Commit Graph

2463 Commits

Author SHA1 Message Date
Sunil Muthuswamy 6dc2a774cb x86/Hyper-V: Support for free page reporting
Linux has support for free page reporting now (36e66c554b) for
virtualized environment. On Hyper-V when virtually backed VMs are
configured, Hyper-V will advertise cold memory discard capability,
when supported. This patch adds the support to hook into the free
page reporting infrastructure and leverage the Hyper-V cold memory
discard hint hypercall to report/free these pages back to the host.

Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Tested-by: Matheus Castello <matheus@castello.eng.br>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/SN4PR2101MB0880121FA4E2FEC67F35C1DCC0649@SN4PR2101MB0880.namprd21.prod.outlook.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2021-03-24 11:35:24 +00:00
Michael Kelley a620bbaa35 asm-generic/hyperv: Add missing function prototypes per -W1 warnings
Add two function prototypes for -W1 warnings generated by the
kernel test robot.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1615402069-39462-1-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2021-03-11 10:12:22 +00:00
Michael Kelley ec866be6ec clocksource/drivers/hyper-v: Move handling of STIMER0 interrupts
STIMER0 interrupts are most naturally modeled as per-cpu IRQs. But
because x86/x64 doesn't have per-cpu IRQs, the core STIMER0 interrupt
handling machinery is done in code under arch/x86 and Linux IRQs are
not used. Adding support for ARM64 means adding equivalent code
using per-cpu IRQs under arch/arm64.

A better model is to treat per-cpu IRQs as the normal path (which it is
for modern architectures), and the x86/x64 path as the exception. Do this
by incorporating standard Linux per-cpu IRQ allocation into the main
SITMER0 driver code, and bypass it in the x86/x64 exception case. For
x86/x64, special case code is retained under arch/x86, but no STIMER0
interrupt handling code is needed under arch/arm64.

No functional change.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/1614721102-2241-11-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2021-03-08 17:33:00 +00:00
Michael Kelley d608715d47 Drivers: hv: vmbus: Move handling of VMbus interrupts
VMbus interrupts are most naturally modelled as per-cpu IRQs.  But
because x86/x64 doesn't have per-cpu IRQs, the core VMbus interrupt
handling machinery is done in code under arch/x86 and Linux IRQs are
not used.  Adding support for ARM64 means adding equivalent code
using per-cpu IRQs under arch/arm64.

A better model is to treat per-cpu IRQs as the normal path (which it is
for modern architectures), and the x86/x64 path as the exception.  Do this
by incorporating standard Linux per-cpu IRQ allocation into the main VMbus
driver, and bypassing it in the x86/x64 exception case. For x86/x64,
special case code is retained under arch/x86, but no VMbus interrupt
handling code is needed under arch/arm64.

No functional change.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/1614721102-2241-7-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2021-03-08 17:33:00 +00:00
Michael Kelley b548a77427 Drivers: hv: vmbus: Move hyperv_report_panic_msg to arch neutral code
With the new Hyper-V MSR set function, hyperv_report_panic_msg() can be
architecture neutral, so move it out from under arch/x86 and merge into
hv_kmsg_dump(). This move also avoids needing a separate implementation
under arch/arm64.

No functional change.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/1614721102-2241-5-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2021-03-08 17:32:59 +00:00
Michael Kelley f3c5e63c36 Drivers: hv: Redo Hyper-V synthetic MSR get/set functions
Current code defines a separate get and set macro for each Hyper-V
synthetic MSR used by the VMbus driver. Furthermore, the get macro
can't be converted to a standard function because the second argument
is modified in place, which is somewhat bad form.

Redo this by providing a single get and a single set function that
take a parameter specifying the MSR to be operated on. Fixup usage
of the get function. Calling locations are no more complex than before,
but the code under arch/x86 and the upcoming code under arch/arm64
is significantly simplified.

Also standardize the names of Hyper-V synthetic MSRs that are
architecture neutral. But keep the old x86-specific names as aliases
that can be removed later when all references (particularly in KVM
code) have been cleaned up in a separate patch series.

No functional change.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/1614721102-2241-4-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2021-03-08 17:32:59 +00:00
Michael Kelley 5e4e6ddf8d x86/hyper-v: Move hv_message_type to architecture neutral module
The definition of enum hv_message_type includes arch neutral and
x86/x64-specific values. Ideally there would be a way to put the
arch neutral values in an arch neutral module, and the arch
specific values in an arch specific module. But C doesn't provide
a way to extend enum types. As a compromise, move the entire
definition into an arch neutral module, to avoid duplicating the
arch neutral values for x86/x64 and for ARM64.

No functional change.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/1614721102-2241-3-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2021-03-08 17:32:59 +00:00
Michael Kelley ca48739e59 Drivers: hv: vmbus: Move Hyper-V page allocator to arch neutral code
The Hyper-V page allocator functions are implemented in an architecture
neutral way.  Move them into the architecture neutral VMbus module so
a separate implementation for ARM64 is not needed.

No functional change.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/1614721102-2241-2-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2021-03-08 17:32:59 +00:00
Linus Torvalds 8b83369ddc RISC-V Patches for the 5.12 Merge Window
I have a handful of new RISC-V related patches for this merge window:
 
 * A check to ensure drivers are properly using uaccess.  This isn't
   manifesting with any of the drivers I'm currently using, but may catch
   errors in new drivers.
 * Some preliminary support for the FU740, along with the HiFive
   Unleashed it will appear on.
 * NUMA support for RISC-V, which involves making the arm64 code generic.
 * Support for kasan on the vmalloc region.
 * A handful of new drivers for the Kendryte K210, along with the DT
   plumbing required to boot on a handful of K210-based boards.
 * Support for allocating ASIDs.
 * Preliminary support for kernels larger than 128MiB.
 * Various other improvements to our KASAN support, including the
   utilization of huge pages when allocating the KASAN regions.
 
 We may have already found a bug with the KASAN_VMALLOC code, but it's
 passing my tests.  There's a fix in the works, but that will probably
 miss the merge window.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEKzw3R0RoQ7JKlDp6LhMZ81+7GIkFAmA4hXATHHBhbG1lckBk
 YWJiZWx0LmNvbQAKCRAuExnzX7sYifryD/0SfXGOfj93Cxq7I7AYhhzCN7lJ5jvv
 iEQScTlPqU9nfvYodo4EDq0fp+5LIPpTL/XBHtqVjzv0FqRNa28Ea0K7kO8HuXc4
 BaUd0m/DqyB4Gfgm4qjc5bDneQ1ZYxVXprYERWNQ5Fj+tdWhaQGOW64N/TVodjjj
 NgJtTqbIAcjJqjUtttM8TZN5U1TgwLo+KCqw3iYW12lV1YKBBuvrwvSdD6jnFdIQ
 AzG/wRGZhxLoFxgBB/NEsZxDoSd6ztiwxLhS9lX4okZVsryyIdOE70Q/MflfiTlU
 xE+AdxQXTMUiiqYSmHeDD6PDb57GT/K3hnjI1yP+lIZpbInsi29JKow1qjyYjfHl
 9cSSKYCIXHL7jKU6pgt34G1O5N5+fgqHQhNbfKvlrQ2UPlfs/tWdKHpFIP/z9Jlr
 0vCAou7NSEB9zZGqzO63uBLXoN8yfL8FT3uRnnRvoRpfpex5dQX2QqPLQ7327D7N
 GUG31nd1PHTJPdxJ1cI4SO24PqPpWDWY9uaea+0jv7ivGClVadZPco/S3ZKloguT
 lazYUvyA4oRrSAyln785Rd8vg4CinqTxMtIyZbRMbNkgzVQARi9a8rjvu4n9qms2
 2wlXDFi8nR8B4ih5n79dSiiLM9ay9GJDxMcf9VxIxSAYZV2fJALnpK6gV2fzRBUe
 +k/uv8BIsFmlwQ==
 =CutX
 -----END PGP SIGNATURE-----

Merge tag 'riscv-for-linus-5.12-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V updates from Palmer Dabbelt:
 "A handful of new RISC-V related patches for this merge window:

   - A check to ensure drivers are properly using uaccess. This isn't
     manifesting with any of the drivers I'm currently using, but may
     catch errors in new drivers.

   - Some preliminary support for the FU740, along with the HiFive
     Unleashed it will appear on.

   - NUMA support for RISC-V, which involves making the arm64 code
     generic.

   - Support for kasan on the vmalloc region.

   - A handful of new drivers for the Kendryte K210, along with the DT
     plumbing required to boot on a handful of K210-based boards.

   - Support for allocating ASIDs.

   - Preliminary support for kernels larger than 128MiB.

   - Various other improvements to our KASAN support, including the
     utilization of huge pages when allocating the KASAN regions.

  We may have already found a bug with the KASAN_VMALLOC code, but it's
  passing my tests. There's a fix in the works, but that will probably
  miss the merge window.

* tag 'riscv-for-linus-5.12-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (75 commits)
  riscv: Improve kasan population by using hugepages when possible
  riscv: Improve kasan population function
  riscv: Use KASAN_SHADOW_INIT define for kasan memory initialization
  riscv: Improve kasan definitions
  riscv: Get rid of MAX_EARLY_MAPPING_SIZE
  soc: canaan: Sort the Makefile alphabetically
  riscv: Disable KSAN_SANITIZE for vDSO
  riscv: Remove unnecessary declaration
  riscv: Add Canaan Kendryte K210 SD card defconfig
  riscv: Update Canaan Kendryte K210 defconfig
  riscv: Add Kendryte KD233 board device tree
  riscv: Add SiPeed MAIXDUINO board device tree
  riscv: Add SiPeed MAIX GO board device tree
  riscv: Add SiPeed MAIX DOCK board device tree
  riscv: Add SiPeed MAIX BiT board device tree
  riscv: Update Canaan Kendryte K210 device tree
  dt-bindings: add resets property to dw-apb-timer
  dt-bindings: fix sifive gpio properties
  dt-bindings: update sifive uart compatible string
  dt-bindings: update sifive clint compatible string
  ...
2021-02-26 10:28:35 -08:00
Linus Torvalds 2bd3f4eeb3 orphan-handling fix for v5.12-rc1
- Define SANTIZER_DISCARDS with CONFIG_GCOV_KERNEL=y (Nathan Chancellor)
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEpcP2jyKd1g9yPm4TiXL039xtwCYFAmA4FAEACgkQiXL039xt
 wCZqSQ//RLjz6rY03RdEMYY6oINrQQkZz82bVgJ8yxACErlmzXTOxf0UvVk+OgCk
 x99e7X1INSNj6mJDPe60cu+5bwZA1etx2aWAuE2BYVWm8AyHFK+A51qjXkH6GQEk
 w6Fv7LEgGItFzBJfEnpsDLRZ9RLjrW6dnJ94weIODcvfaf9Nkh/igjegy4X9GSU9
 n2Pb3u02jCeBlAJY3ChLHIt/uvrMqhwN0P0qQLGfNUGrLevOEJTBacgMWlYWLE1I
 KmLlDaRBS43zPsbpvkFykVHGvW7ISmxNmrUstCa2UPVanEOC9XhvnPRiNz2pqy1i
 aFkUkvf5b+JiHurLMJL9DrBID/tRQreaUMex93kAQSB6x0KwfP8047Zv0MnbXzxb
 /NlwggGUUDuT8I3AnhyxeZ0o37XnTj1Gcb1mdPYVWJhSs2D2N1wwA5U8ySrS5BXc
 xo0/n4LzJ6oAPPNKxZRJxx03zlWafx52JruKAXkuqrqgf4BTYHTjrBsCGLewNAwC
 D1oZB98CLSY9GHoBnwU55+CeBflXrUN3Msgsw7S6JG/keQMEEIFpzLmxwIss1hhi
 503L0O9ZDRH9fddkFJ7AYtz5PDcgwbipSbN7+4HMUlbrRIbBrqaR7Q9F82Aw1hxe
 peih0G5izT5EM8bsrB/DSegj4IQD9wUr/NB4CJb24kHTgV0G9Ls=
 =A/Ky
 -----END PGP SIGNATURE-----

Merge tag 'orphan-handling-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull orphan handling fix from Kees Cook:
 "Another case of bogus .eh_frame emission was noticed under
  CONFIG_GCOV_KERNEL=y.

  Summary:

   - Define SANITIZER_DISCARDS with CONFIG_GCOV_KERNEL=y (Nathan
     Chancellor)"

* tag 'orphan-handling-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  vmlinux.lds.h: Define SANITIZER_DISCARDS with CONFIG_GCOV_KERNEL=y
2021-02-26 10:12:19 -08:00
Nathan Chancellor f5b6a74d9c vmlinux.lds.h: Define SANTIZER_DISCARDS with CONFIG_GCOV_KERNEL=y
clang produces .eh_frame sections when CONFIG_GCOV_KERNEL is enabled,
even when -fno-asynchronous-unwind-tables is in KBUILD_CFLAGS:

$ make CC=clang vmlinux
...
ld: warning: orphan section `.eh_frame' from `init/main.o' being placed in section `.eh_frame'
ld: warning: orphan section `.eh_frame' from `init/version.o' being placed in section `.eh_frame'
ld: warning: orphan section `.eh_frame' from `init/do_mounts.o' being placed in section `.eh_frame'
ld: warning: orphan section `.eh_frame' from `init/do_mounts_initrd.o' being placed in section `.eh_frame'
ld: warning: orphan section `.eh_frame' from `init/initramfs.o' being placed in section `.eh_frame'
ld: warning: orphan section `.eh_frame' from `init/calibrate.o' being placed in section `.eh_frame'
ld: warning: orphan section `.eh_frame' from `init/init_task.o' being placed in section `.eh_frame'
...

$ rg "GCOV_KERNEL|GCOV_PROFILE_ALL" .config
CONFIG_GCOV_KERNEL=y
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
CONFIG_GCOV_PROFILE_ALL=y

This was already handled for a couple of other options in
commit d812db7828 ("vmlinux.lds.h: Avoid KASAN and KCSAN's unwanted
sections") and there is an open LLVM bug for this issue. Take advantage
of that section for this config as well so that there are no more orphan
warnings.

Link: https://bugs.llvm.org/show_bug.cgi?id=46478
Link: https://github.com/ClangBuiltLinux/linux/issues/1069
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Fangrui Song <maskray@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Fixes: d812db7828 ("vmlinux.lds.h: Avoid KASAN and KCSAN's unwanted sections")
Cc: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210130004650.2682422-1-nathan@kernel.org
2021-02-25 13:15:25 -08:00
Linus Torvalds a6525b9999 - added n64 block driver
- fix for ubsan warnings
 - fix for bcm63xx platform
 - update of linux-mips mailinglist
 -----BEGIN PGP SIGNATURE-----
 
 iQJOBAABCAA4FiEEbt46xwy6kEcDOXoUeZbBVTGwZHAFAmA3+WoaHHRzYm9nZW5k
 QGFscGhhLmZyYW5rZW4uZGUACgkQeZbBVTGwZHB+mw/9HVN4BVGO6PM62ZH/WOYc
 M6G8i0Bfa/ZO0XLiFMMUVlRtDkbXWaNbNIzO6f3ud6Me1+D3aLW8j4yhhVs+yki0
 SuspDPDAwtnmsE1DMnr21eL+p5VSaMhdCLdL2pAWErLHBy3oXLSJ1kajhuMs+vVp
 2Zq7k1rjJdiYAULep21VDi0CQfTTudFOCkJs0AqbSA6tmPiFZXp8Y/rDOHAu2wro
 6iNd4qkh9ASpFgWWWBVuPmsKbTNAEaYIcjGMMm692sraKYOKxqeaCfwyG2odMNFk
 If8tnFJgRg+wdS+ZUnX/R9cxrSrZ/QeoUOl6qGUnJWodhlGpm/nSjYSYm5mS7mVX
 FPnG2NWjw6pvhf3reupyS4JqcdLJ9Ldk8KJZe8rLXIcrgd90kuMj0ahoc8NY04rs
 /ZMVLWZ72XgFvEJeCWdXWvVf21gi3F0MGFJiGPHXTk1leDhNLRFR+ExaEPRjt1HK
 KENlBNuXzO790EyfDe/Z7Abq3r4wf17RmXHcoU1FLSRxBtIT8gwF2E4jZB6gzlh7
 WaXVHAkxyP0AO11Zo6h/eWaeeulH8lnPSKVvDL4px/apsvnlE56IPClBAMT3Fhhy
 ZEiFIiT7eJzs4reDnB9PxxySR4v79xQTdv9jRi1f3wVRQiNaqkGdcrAaj9SVeck5
 FsD/Desev/Hu1+maUlY221g=
 =KT2b
 -----END PGP SIGNATURE-----

Merge tag 'mips_5.12_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull more MIPS updates from Thomas Bogendoerfer:

 - added n64 block driver

 - fix for ubsan warnings

 - fix for bcm63xx platform

 - update of linux-mips mailinglist

* tag 'mips_5.12_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  arch: mips: update references to current linux-mips list
  mips: bmips: init clocks earlier
  vmlinux.lds.h: catch even more instrumentation symbols into .data
  n64: store dev instance into disk private data
  n64: cleanup n64cart_probe()
  n64: cosmetics changes
  n64: remove curly brackets
  n64: use sector SECTOR_SHIFT instead 512
  n64: use enums for reg
  n64: move module param at the top
  n64: move module info at the end
  n64: use pr_fmt to avoid duplicate string
  block: Add n64 cart driver
2021-02-25 12:18:21 -08:00
Linus Torvalds 6fbd6cf85a Kbuild updates for v5.12
- Fix false-positive build warnings for ARCH=ia64 builds
 
  - Optimize dictionary size for module compression with xz
 
  - Check the compiler and linker versions in Kconfig
 
  - Fix misuse of extra-y
 
  - Support DWARF v5 debug info
 
  - Clamp SUBLEVEL to 255 because stable releases 4.4.x and 4.9.x
    exceeded the limit
 
  - Add generic syscall{tbl,hdr}.sh for cleanups across arches
 
  - Minor cleanups of genksyms
 
  - Minor cleanups of Kconfig
 -----BEGIN PGP SIGNATURE-----
 
 iQJJBAABCgAzFiEEbmPs18K1szRHjPqEPYsBB53g2wYFAmA3zhgVHG1hc2FoaXJv
 eUBrZXJuZWwub3JnAAoJED2LAQed4NsG0C4P/A5hUNFdkYI+EffAWZiHn69t0S8j
 M1GQkZildKu/yOfm6hp3mNwgHmYgw0aAuch1htkJuv+5rXRtoK77yw0xKbUqNHyO
 VqkJWQPVUXJbWIDiu332NaETHbFTWCnPZKGmzcbVOBHbYsXUJPp17gROQ9ke0fQN
 Ae6OV5WINhoS8UnjESWb3qOO87MdQTZ+9mP+NMnVh4kV1SUeMAXLFwFll66KZTkj
 GXB330N3p9L0wQVljhXpQ/YPOd76wJNPhJWJ9+hKLFbWsedovzlHb+duprh1z1xe
 7LLaq9dEbXxe1Uz0qmK76lupXxilYMyUupTW9HIYtIsY8br8DIoBOG0bn46LVnuL
 /m+UQNfUFCYYePT7iZQNNc1DISQJrxme3bjq0PJzZTDukNnHJVahnj9x4RoNaF8j
 Dc+JME0r2i8Ccp28vgmaRgzvSsb8Xtw5icwRdwzIpyt1ubs/+tkd/GSaGzQo30Q8
 m8y1WOjovHNX7OGnOaOWBGoQAX/2k/VHeAediMsPqWUoOxwsLHYxG/4KtgwbJ5vc
 gu/Fyk1GRDklZPpLdYFVvz8TGnqSDogJgF+7WolJ6YvPGAUIDAfd5Ky2sWayddlm
 wchc3sKDVyh3lov23h0WQVTvLO9xl+NZ6THxoAGdYeQ0DUu5OxwH8qje/UpWuo1a
 DchhNN+g5pa6n56Z
 =sLxb
 -----END PGP SIGNATURE-----

Merge tag 'kbuild-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Fix false-positive build warnings for ARCH=ia64 builds

 - Optimize dictionary size for module compression with xz

 - Check the compiler and linker versions in Kconfig

 - Fix misuse of extra-y

 - Support DWARF v5 debug info

 - Clamp SUBLEVEL to 255 because stable releases 4.4.x and 4.9.x
   exceeded the limit

 - Add generic syscall{tbl,hdr}.sh for cleanups across arches

 - Minor cleanups of genksyms

 - Minor cleanups of Kconfig

* tag 'kbuild-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (38 commits)
  initramfs: Remove redundant dependency of RD_ZSTD on BLK_DEV_INITRD
  kbuild: remove deprecated 'always' and 'hostprogs-y/m'
  kbuild: parse C= and M= before changing the working directory
  kbuild: reuse this-makefile to define abs_srctree
  kconfig: unify rule of config, menuconfig, nconfig, gconfig, xconfig
  kconfig: omit --oldaskconfig option for 'make config'
  kconfig: fix 'invalid option' for help option
  kconfig: remove dead code in conf_askvalue()
  kconfig: clean up nested if-conditionals in check_conf()
  kconfig: Remove duplicate call to sym_get_string_value()
  Makefile: Remove # characters from compiler string
  Makefile: reuse CC_VERSION_TEXT
  kbuild: check the minimum linker version in Kconfig
  kbuild: remove ld-version macro
  scripts: add generic syscallhdr.sh
  scripts: add generic syscalltbl.sh
  arch: syscalls: remove $(srctree)/ prefix from syscall tables
  arch: syscalls: add missing FORCE and fix 'targets' to make if_changed work
  gen_compile_commands: prune some directories
  kbuild: simplify access to the kernel's version
  ...
2021-02-25 10:17:31 -08:00
Linus Torvalds 29c395c77a Rework of the X86 irq stack handling:
The irq stack switching was moved out of the ASM entry code in course of
   the entry code consolidation. It ended up being suboptimal in various
   ways.
 
   - Make the stack switching inline so the stackpointer manipulation is not
     longer at an easy to find place.
 
   - Get rid of the unnecessary indirect call.
 
   - Avoid the double stack switching in interrupt return and reuse the
     interrupt stack for softirq handling.
 
   - A objtool fix for CONFIG_FRAME_POINTER=y builds where it got confused
     about the stack pointer manipulation.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAmA21OcTHHRnbHhAbGlu
 dXRyb25peC5kZQAKCRCmGPVMDXSYoaX0D/9S0ud6oqbsIvI8LwhvYub63a2cjKP9
 liHAJ7xwMYYVwzf0skwsPb/QE6+onCzdq0upJkgG/gEYm2KbiaMWZ4GgHdj0O7ER
 qXKJONDd36AGxSEdaVzLY5kPuD/mkomGk5QdaZaTmjruthkNzg4y/N2wXUBIMZR0
 FdpSpp5fGspSZCn/DXDx6FjClwpLI53VclvDs6DcZ2DIBA0K+F/cSLb1UQoDLE1U
 hxGeuNa+GhKeeZ5C+q5giho1+ukbwtjMW9WnKHAVNiStjm0uzdqq7ERGi/REvkcB
 LY62u5uOSW1zIBMmzUjDDQEqvypB0iFxFCpN8g9sieZjA0zkaUioRTQyR+YIQ8Cp
 l8LLir0dVQivR1bHghHDKQJUpdw/4zvDj4mMH10XHqbcOtIxJDOJHC5D00ridsAz
 OK0RlbAJBl9FTdLNfdVReBCoehYAO8oefeyMAG12nZeSh5XVUWl238rvzmzIYNhG
 cEtkSx2wIUNEA+uSuI+xvfmwpxL7voTGvqmiRDCAFxyO7Bl/GBu9OEBFA1eOvHB+
 +wTmPDMswRetQNh4QCRXzk1JzP1Wk5CobUL9iinCWFoTJmnsPPSOWlosN6ewaNXt
 kYFpRLy5xt9EP7dlfgBSjiRlthDhTdMrFjD5bsy1vdm1w7HKUo82lHa4O8Hq3PHS
 tinKICUqRsbjig==
 =Sqr1
 -----END PGP SIGNATURE-----

Merge tag 'x86-entry-2021-02-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 irq entry updates from Thomas Gleixner:
 "The irq stack switching was moved out of the ASM entry code in course
  of the entry code consolidation. It ended up being suboptimal in
  various ways.

  This reworks the X86 irq stack handling:

   - Make the stack switching inline so the stackpointer manipulation is
     not longer at an easy to find place.

   - Get rid of the unnecessary indirect call.

   - Avoid the double stack switching in interrupt return and reuse the
     interrupt stack for softirq handling.

   - A objtool fix for CONFIG_FRAME_POINTER=y builds where it got
     confused about the stack pointer manipulation"

* tag 'x86-entry-2021-02-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool: Fix stack-swizzle for FRAME_POINTER=y
  um: Enforce the usage of asm-generic/softirq_stack.h
  x86/softirq/64: Inline do_softirq_own_stack()
  softirq: Move do_softirq_own_stack() to generic asm header
  softirq: Move __ARCH_HAS_DO_SOFTIRQ to Kconfig
  x86: Select CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK
  x86/softirq: Remove indirection in do_softirq_own_stack()
  x86/entry: Use run_sysvec_on_irqstack_cond() for XEN upcall
  x86/entry: Convert device interrupts to inline stack switching
  x86/entry: Convert system vectors to irq stack macro
  x86/irq: Provide macro for inlining irq stack switching
  x86/apic: Split out spurious handling code
  x86/irq/64: Adjust the per CPU irq stack pointer by 8
  x86/irq: Sanitize irq stack tracking
  x86/entry: Fix instrumentation annotation
2021-02-24 16:32:23 -08:00
Linus Torvalds 21a6ab2131 Modules updates for v5.12
Summary of modules changes for the 5.12 merge window:
 
 - Retire EXPORT_UNUSED_SYMBOL() and EXPORT_SYMBOL_GPL_FUTURE(). These export
   types were introduced between 2006 - 2008. All the of the unused symbols have
   been long removed and gpl future symbols were converted to gpl quite a long
   time ago, and I don't believe these export types have been used ever since.
   So, I think it should be safe to retire those export types now. (Christoph Hellwig)
 
 - Refactor and clean up some aged code cruft in the module loader (Christoph Hellwig)
 
 - Build {,module_}kallsyms_on_each_symbol only when livepatching is enabled, as
   it is the only caller (Christoph Hellwig)
 
 - Unexport find_module() and module_mutex and fix the last module
   callers to not rely on these anymore. Make module_mutex internal to
   the module loader. (Christoph Hellwig)
 
 - Harden ELF checks on module load and validate ELF structures before checking
   the module signature (Frank van der Linden)
 
 - Fix undefined symbol warning for clang (Fangrui Song)
 
 - Fix smatch warning (Dan Carpenter)
 
 Signed-off-by: Jessica Yu <jeyu@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJEBAABCAAuFiEEVrp26glSWYuDNrCUwEV+OM47wXIFAmA0/KMQHGpleXVAa2Vy
 bmVsLm9yZwAKCRDARX44zjvBcu0uD/4nmRp18EKAtdUZivsZHat0aEWGlkmrVueY
 5huYw6iwM8b/wIAl3xwLki1Iv0/l0a83WXZhLG4ekl0/Nj8kgllA+jtBrZWpoLMH
 CZusN5dS9YwwyD2vu3ak83ARcehcDEPeA9thvc3uRFGis6Hi4bt1rkzGdrzsgqR4
 tybfN4qaQx4ZAKFxA8bnS58l7QTFwUzTxJfM6WWzl1Q+mLZDr/WP+loJ/f1/oFFg
 ufN31KrqqFpdQY5UKq5P4H8FVq/eXE1Mwl8vo3HsnAj598fznyPUmA3D/j+N4GuR
 sTGBVZ9CSehUj7uZRs+Qgg6Bd+y3o44N29BrdZWA6K3ieTeQQpA+VgPUNrDBjGhP
 J/9Y4ms4PnuNEWWRaa73m9qsVqAsjh9+T2xp9PYn9uWLCM8BvQFtWcY7tw4/nB0/
 INmyiP/tIRpwWkkBl47u1TPR09FzBBGDZjBiSn3lm3VX+zCYtHoma5jWyejG11cf
 ybDrTsci9ANyHNP2zFQsUOQJkph78PIal0i3k4ODqGJvaC0iEIH3Xjv+0dmE14rq
 kGRrG/HN6HhMZPjashudVUktyTZ63+PJpfFlQbcUzdvjQQIkzW0vrCHMWx9vD1xl
 Na7vZLl4Nb03WSJp6saY6j2YSRKL0poGETzGqrsUAHEhpEOPHduaiCVlAr/EmeMk
 p6SrWv8+UQ==
 =T29Q
 -----END PGP SIGNATURE-----

Merge tag 'modules-for-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux

Pull module updates from Jessica Yu:

 - Retire EXPORT_UNUSED_SYMBOL() and EXPORT_SYMBOL_GPL_FUTURE(). These
   export types were introduced between 2006 - 2008. All the of the
   unused symbols have been long removed and gpl future symbols were
   converted to gpl quite a long time ago, and I don't believe these
   export types have been used ever since. So, I think it should be safe
   to retire those export types now (Christoph Hellwig)

 - Refactor and clean up some aged code cruft in the module loader
   (Christoph Hellwig)

 - Build {,module_}kallsyms_on_each_symbol only when livepatching is
   enabled, as it is the only caller (Christoph Hellwig)

 - Unexport find_module() and module_mutex and fix the last module
   callers to not rely on these anymore. Make module_mutex internal to
   the module loader (Christoph Hellwig)

 - Harden ELF checks on module load and validate ELF structures before
   checking the module signature (Frank van der Linden)

 - Fix undefined symbol warning for clang (Fangrui Song)

 - Fix smatch warning (Dan Carpenter)

* tag 'modules-for-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
  module: potential uninitialized return in module_kallsyms_on_each_symbol()
  module: remove EXPORT_UNUSED_SYMBOL*
  module: remove EXPORT_SYMBOL_GPL_FUTURE
  module: move struct symsearch to module.c
  module: pass struct find_symbol_args to find_symbol
  module: merge each_symbol_section into find_symbol
  module: remove each_symbol_in_section
  module: mark module_mutex static
  kallsyms: only build {,module_}kallsyms_on_each_symbol when required
  kallsyms: refactor {,module_}kallsyms_on_each_symbol
  module: use RCU to synchronize find_module
  module: unexport find_module and module_mutex
  drm: remove drm_fb_helper_modinit
  powerpc/powernv: remove get_cxl_module
  module: harden ELF info handling
  module: Ignore _GLOBAL_OFFSET_TABLE_ when warning for undefined symbols
2021-02-23 10:15:33 -08:00
Linus Torvalds 79db4d2293 clang-lto series for v5.12-rc1
- Clang LTO build infrastructure and arm64-specific enablement (Sami Tolvanen)
 - Recursive build CC_FLAGS_LTO fix (Alexander Lobakin)
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEpcP2jyKd1g9yPm4TiXL039xtwCYFAmA0OEYACgkQiXL039xt
 wCYGJw/8CcyvQUGmXYEZVDLMahKz93RYijiGuSTVnhl0pNAyfOojaZ8Z//eD1VNA
 s82azW1XybbA6RnPGD7YQzYz27cSF2qUFDmplwVfE4mwBnPXzRxtVBDLSxksP1HS
 77sCOu91QhbovPCWET4dSHLJB3DVc78FiW4lVlRgrglyAz+dut1iXYar5e7VNoS0
 S4MwnqwteHC6YXP619rubhpdDoj7njuw1uxRIaodt9S/zRSpl5MCUgHmzQusgezs
 yWDdPHPWHnF7xxKgwSvE7AKZPdOnIxKxRi6Yd6vUIyrYB3qLZkFe75nUsgMroAhs
 /Bgrn69U2McMiJsOdh0ERzP2VNYfvMacBQ308nb45j83Bgv5l6uj8QOZU4ZogmXV
 PsDzsfUe9GsxgYexfozGX61rpd6JinzQKVyoDW3oTT54fbBxO3uDqT8kOBw72dPT
 9nkOxTzyb+UO0dpb/MhXLGkGcv8+lTA5ffVIKUx5UxKngRbukc3dxwVJgO4HmucK
 bwVQGD83D+/if5/JL9WtQRjDwFEn+IFmdv+3cAXkRo4IIS18LPZB1MJncTeWr8Z9
 HlkuDXlJOncUWCABGd1IKu1j0S2HpXV4qhqQXJ6PdfOvUPEaD9qgqEAjD5FxxyXF
 wpaV2MWya5i1FGwD5UKhi8hVnAFJyF0/w+enjiPwlmIbjdyEVXE=
 =6peY
 -----END PGP SIGNATURE-----

Merge tag 'clang-lto-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull clang LTO updates from Kees Cook:
 "Clang Link Time Optimization.

  This is built on the work done preparing for LTO by arm64 folks,
  tracing folks, etc. This includes the core changes as well as the
  remaining pieces for arm64 (LTO has been the default build method on
  Android for about 3 years now, as it is the prerequisite for the
  Control Flow Integrity protections).

  While x86 LTO enablement is done, it depends on some pending objtool
  clean-ups. It's possible that I'll send a "part 2" pull request for
  LTO that includes x86 support.

  For merge log posterity, and as detailed in commit dc5723b02e
  ("kbuild: add support for Clang LTO"), here is the lt;dr to do an LTO
  build:

        make LLVM=1 LLVM_IAS=1 defconfig
        scripts/config -e LTO_CLANG_THIN
        make LLVM=1 LLVM_IAS=1

  (To do a cross-compile of arm64, add "CROSS_COMPILE=aarch64-linux-gnu-"
  and "ARCH=arm64" to the "make" command lines.)

  Summary:

   - Clang LTO build infrastructure and arm64-specific enablement (Sami
     Tolvanen)

   - Recursive build CC_FLAGS_LTO fix (Alexander Lobakin)"

* tag 'clang-lto-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  kbuild: prevent CC_FLAGS_LTO self-bloating on recursive rebuilds
  arm64: allow LTO to be selected
  arm64: disable recordmcount with DYNAMIC_FTRACE_WITH_REGS
  arm64: vdso: disable LTO
  drivers/misc/lkdtm: disable LTO for rodata.o
  efi/libstub: disable LTO
  scripts/mod: disable LTO for empty.c
  modpost: lto: strip .lto from module names
  PCI: Fix PREL32 relocations for LTO
  init: lto: fix PREL32 relocations
  init: lto: ensure initcall ordering
  kbuild: lto: add a default list of used symbols
  kbuild: lto: merge module sections
  kbuild: lto: limit inlining
  kbuild: lto: fix module versioning
  kbuild: add support for Clang LTO
  tracing: move function tracer options to Kconfig
2021-02-23 09:28:51 -08:00
Alexander Lobakin 49387f6288 vmlinux.lds.h: catch even more instrumentation symbols into .data
LKP caught another bunch of orphaned instrumentation symbols [0]:

mipsel-linux-ld: warning: orphan section `.data.$LPBX1' from
`init/main.o' being placed in section `.data.$LPBX1'
mipsel-linux-ld: warning: orphan section `.data.$LPBX0' from
`init/main.o' being placed in section `.data.$LPBX0'
mipsel-linux-ld: warning: orphan section `.data.$LPBX1' from
`init/do_mounts.o' being placed in section `.data.$LPBX1'
mipsel-linux-ld: warning: orphan section `.data.$LPBX0' from
`init/do_mounts.o' being placed in section `.data.$LPBX0'
mipsel-linux-ld: warning: orphan section `.data.$LPBX1' from
`init/do_mounts_initrd.o' being placed in section `.data.$LPBX1'
mipsel-linux-ld: warning: orphan section `.data.$LPBX0' from
`init/do_mounts_initrd.o' being placed in section `.data.$LPBX0'
mipsel-linux-ld: warning: orphan section `.data.$LPBX1' from
`init/initramfs.o' being placed in section `.data.$LPBX1'
mipsel-linux-ld: warning: orphan section `.data.$LPBX0' from
`init/initramfs.o' being placed in section `.data.$LPBX0'
mipsel-linux-ld: warning: orphan section `.data.$LPBX1' from
`init/calibrate.o' being placed in section `.data.$LPBX1'
mipsel-linux-ld: warning: orphan section `.data.$LPBX0' from
`init/calibrate.o' being placed in section `.data.$LPBX0'

[...]

Soften the wildcard to .data.$L* to grab these ones into .data too.

[0] https://lore.kernel.org/lkml/202102231519.lWPLPveV-lkp@intel.com

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-23 13:23:11 +01:00
Linus Torvalds 04471d3f18 This pull request contains the following changes for UML:
- Many cleanups and fixes for our virtio code
 - Add support for a pseudo RTC
 - Fix for a possible jailbreak
 - Minor fixes (spelling, header files)
 -----BEGIN PGP SIGNATURE-----
 
 iQJKBAABCAA0FiEEdgfidid8lnn52cLTZvlZhesYu8EFAmAyu0oWHHJpY2hhcmRA
 c2lnbWEtc3Rhci5hdAAKCRBm+VmF6xi7wd5jD/9sb/5xYhXCSfTdPS/eIrWvBQoc
 B8rxLfRpYW1Yvzz4R60/vKe8/td5I1/AvlprLp/1AJeawl49vCbSOqwdjn+58Uqb
 rlagZ2Ikilfn5lVIsxPf8fjbleonvBe8qVA30gJKgCYdYuAcXLs404jZ8MMvwZ0g
 t4G7BUc7bq19+UVF06kwefzC64c1WgPiHTmO6DT6RcXoFKq/x6i1FN4QnMEoiKQi
 SsficYHo7FsIhJZKtgTfujzEInLyMMuZ9mTJU/3wwUveLWArG0NRtIttC6FPvhi4
 xx5RlTfC/Jzoqi9Qo14bLqV6KcOU/J7Oi4bDpYyhNggF/QfhnNgT8MGPwx5f+Gso
 8OJg3MsZw70480EBH7/xLSdhZ3ih178Rr/asmiJkwLOYm5zJ22yqtx/jXQBlGOz3
 FHPgTMJcRMzosGqSrhl+KxFdrK1uSLbcFZS3Sp8PUGdtgPPu19Proz2SPdHzt1Mj
 QJY30nRKKUoTLnRYnQV3VSa7uZXGVAK+HtkpRl/ubTKbGcSF8rdl4fYhOPnmAsKQ
 F4HBXwqKBht7eKN2BsNNTLz86OFBopn8eFqq8XxwOqF9O7DZitU0sOboWJyMUY2u
 /QzKxtSAUnNg6Ab+whKhAvkwktJ7IrVJh1JENWDy0pRoCGdF135ajic0bpFDCjqV
 ohOT/Ol+p4/ClLgxiw==
 =e5Qa
 -----END PGP SIGNATURE-----

Merge tag 'for-linux-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

Pull UML updates from Richard Weinberger:

 - Many cleanups and fixes for our virtio code

 - Add support for a pseudo RTC

 - Fix for a possible jailbreak

 - Minor fixes (spelling, header files)

* tag 'for-linux-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: irq.h: include <asm-generic/irq.h>
  um: io.h: include <linux/types.h>
  um: add a pseudo RTC
  um: remove process stub VMA
  um: rework userspace stubs to not hard-code stub location
  um: separate child and parent errors in clone stub
  um: defer killing userspace on page table update failures
  um: mm: check more comprehensively for stub changes
  um: print register names in wait_for_stub
  um: hostfs: use a kmem cache for inodes
  mm: Remove arch_remap() and mm-arch-hooks.h
  um: fix spelling mistake in Kconfig "privleges" -> "privileges"
  um: virtio: allow devices to be configured for wakeup
  um: time-travel: rework interrupt handling in ext mode
  um: virtio: disable VQs during suspend
  um: virtio: fix handling of messages without payload
  um: virtio: clean up a comment
2021-02-21 13:53:00 -08:00
Linus Torvalds 3e10585335 x86:
- Support for userspace to emulate Xen hypercalls
 - Raise the maximum number of user memslots
 - Scalability improvements for the new MMU.  Instead of the complex
   "fast page fault" logic that is used in mmu.c, tdp_mmu.c uses an
   rwlock so that page faults are concurrent, but the code that can run
   against page faults is limited.  Right now only page faults take the
   lock for reading; in the future this will be extended to some
   cases of page table destruction.  I hope to switch the default MMU
   around 5.12-rc3 (some testing was delayed due to Chinese New Year).
 - Cleanups for MAXPHYADDR checks
 - Use static calls for vendor-specific callbacks
 - On AMD, use VMLOAD/VMSAVE to save and restore host state
 - Stop using deprecated jump label APIs
 - Workaround for AMD erratum that made nested virtualization unreliable
 - Support for LBR emulation in the guest
 - Support for communicating bus lock vmexits to userspace
 - Add support for SEV attestation command
 - Miscellaneous cleanups
 
 PPC:
 - Support for second data watchpoint on POWER10
 - Remove some complex workarounds for buggy early versions of POWER9
 - Guest entry/exit fixes
 
 ARM64
 - Make the nVHE EL2 object relocatable
 - Cleanups for concurrent translation faults hitting the same page
 - Support for the standard TRNG hypervisor call
 - A bunch of small PMU/Debug fixes
 - Simplification of the early init hypercall handling
 
 Non-KVM changes (with acks):
 - Detection of contended rwlocks (implemented only for qrwlocks,
   because KVM only needs it for x86)
 - Allow __DISABLE_EXPORTS from assembly code
 - Provide a saner follow_pfn replacements for modules
 -----BEGIN PGP SIGNATURE-----
 
 iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmApSRgUHHBib256aW5p
 QHJlZGhhdC5jb20ACgkQv/vSX3jHroOc7wf9FnlinKoTFaSk7oeuuhF/CoCVwSFs
 Z9+A2sNI99tWHQxFR6dyDkEFeQoXnqSxfLHtUVIdH/JnTg0FkEvFz3NK+0PzY1PF
 PnGNbSoyhP58mSBG4gbBAxdF3ZJZMB8GBgYPeR62PvMX2dYbcHqVBNhlf6W4MQK4
 5mAUuAnbf19O5N267sND+sIg3wwJYwOZpRZB7PlwvfKAGKf18gdBz5dQ/6Ej+apf
 P7GODZITjqM5Iho7SDm/sYJlZprFZT81KqffwJQHWFMEcxFgwzrnYPx7J3gFwRTR
 eeh9E61eCBDyCTPpHROLuNTVBqrAioCqXLdKOtO5gKvZI3zmomvAsZ8uXQ==
 =uFZU
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Paolo Bonzini:
 "x86:

   - Support for userspace to emulate Xen hypercalls

   - Raise the maximum number of user memslots

   - Scalability improvements for the new MMU.

     Instead of the complex "fast page fault" logic that is used in
     mmu.c, tdp_mmu.c uses an rwlock so that page faults are concurrent,
     but the code that can run against page faults is limited. Right now
     only page faults take the lock for reading; in the future this will
     be extended to some cases of page table destruction. I hope to
     switch the default MMU around 5.12-rc3 (some testing was delayed
     due to Chinese New Year).

   - Cleanups for MAXPHYADDR checks

   - Use static calls for vendor-specific callbacks

   - On AMD, use VMLOAD/VMSAVE to save and restore host state

   - Stop using deprecated jump label APIs

   - Workaround for AMD erratum that made nested virtualization
     unreliable

   - Support for LBR emulation in the guest

   - Support for communicating bus lock vmexits to userspace

   - Add support for SEV attestation command

   - Miscellaneous cleanups

  PPC:

   - Support for second data watchpoint on POWER10

   - Remove some complex workarounds for buggy early versions of POWER9

   - Guest entry/exit fixes

  ARM64:

   - Make the nVHE EL2 object relocatable

   - Cleanups for concurrent translation faults hitting the same page

   - Support for the standard TRNG hypervisor call

   - A bunch of small PMU/Debug fixes

   - Simplification of the early init hypercall handling

  Non-KVM changes (with acks):

   - Detection of contended rwlocks (implemented only for qrwlocks,
     because KVM only needs it for x86)

   - Allow __DISABLE_EXPORTS from assembly code

   - Provide a saner follow_pfn replacements for modules"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (192 commits)
  KVM: x86/xen: Explicitly pad struct compat_vcpu_info to 64 bytes
  KVM: selftests: Don't bother mapping GVA for Xen shinfo test
  KVM: selftests: Fix hex vs. decimal snafu in Xen test
  KVM: selftests: Fix size of memslots created by Xen tests
  KVM: selftests: Ignore recently added Xen tests' build output
  KVM: selftests: Add missing header file needed by xAPIC IPI tests
  KVM: selftests: Add operand to vmsave/vmload/vmrun in svm.c
  KVM: SVM: Make symbol 'svm_gp_erratum_intercept' static
  locking/arch: Move qrwlock.h include after qspinlock.h
  KVM: PPC: Book3S HV: Fix host radix SLB optimisation with hash guests
  KVM: PPC: Book3S HV: Ensure radix guest has no SLB entries
  KVM: PPC: Don't always report hash MMU capability for P9 < DD2.2
  KVM: PPC: Book3S HV: Save and restore FSCR in the P9 path
  KVM: PPC: remove unneeded semicolon
  KVM: PPC: Book3S HV: Use POWER9 SLBIA IH=6 variant to clear SLB
  KVM: PPC: Book3S HV: No need to clear radix host SLB before loading HPT guest
  KVM: PPC: Book3S HV: Fix radix guest SLB side channel
  KVM: PPC: Book3S HV: Remove support for running HPT guest on RPT host without mixed mode support
  KVM: PPC: Book3S HV: Introduce new capability for 2nd DAWR
  KVM: PPC: Book3S HV: Add infrastructure to support 2nd DAWR
  ...
2021-02-21 13:31:43 -08:00
Linus Torvalds 9c5b80b795 hyperv-next for 5.12
-----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCAAxFiEEIbPD0id6easf0xsudhRwX5BBoF4FAmArly8THHdlaS5saXVA
 a2VybmVsLm9yZwAKCRB2FHBfkEGgXkRfCADB0PA4xlfVF0Na/iZoBFdNFr3EMU4K
 NddGJYyk0o+gipUIj2xu7TksVw8c1/cWilXOUBe7oZRKw2/fC/0hpDwvLpPtD/wP
 +Tc2DcIgwquMvsSksyqpMOb0YjNNhWCx9A9xPWawpUdg20IfbK/ekRHlFI5MsEww
 7tFS+MHY4QbsPv0WggoK61PGnhGCBt/85Lv4I08ZGohA6uirwC4fNIKp83SgFNtf
 1hHbvpapAFEXwZiKFbzwpue20jWJg+tlTiEFpen3exjBICoagrLLaz3F0SZJvbxl
 2YY32zbBsQe4Izre5PVuOlMoNFRom9NSzEzdZT10g7HNtVrwKVNLcohS
 =MyO4
 -----END PGP SIGNATURE-----

Merge tag 'hyperv-next-signed-20210216' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

Pull Hyper-V updates from Wei Liu:

 - VMBus hardening patches from Andrea Parri and Andres Beltran.

 - Patches to make Linux boot as the root partition on Microsoft
   Hypervisor from Wei Liu.

 - One patch to add a new sysfs interface to support hibernation on
   Hyper-V from Dexuan Cui.

 - Two miscellaneous clean-up patches from Colin and Gustavo.

* tag 'hyperv-next-signed-20210216' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: (31 commits)
  Revert "Drivers: hv: vmbus: Copy packets sent by Hyper-V out of the ring buffer"
  iommu/hyperv: setup an IO-APIC IRQ remapping domain for root partition
  x86/hyperv: implement an MSI domain for root partition
  asm-generic/hyperv: import data structures for mapping device interrupts
  asm-generic/hyperv: introduce hv_device_id and auxiliary structures
  asm-generic/hyperv: update hv_interrupt_entry
  asm-generic/hyperv: update hv_msi_entry
  x86/hyperv: implement and use hv_smp_prepare_cpus
  x86/hyperv: provide a bunch of helper functions
  ACPI / NUMA: add a stub function for node_to_pxm()
  x86/hyperv: handling hypercall page setup for root
  x86/hyperv: extract partition ID from Microsoft Hypervisor if necessary
  x86/hyperv: allocate output arg pages if required
  clocksource/hyperv: use MSR-based access if running as root
  Drivers: hv: vmbus: skip VMBus initialization if Linux is root
  x86/hyperv: detect if Linux is the root partition
  asm-generic/hyperv: change HV_CPU_POWER_MANAGEMENT to HV_CPU_MANAGEMENT
  hv: hyperv.h: Replace one-element array with flexible-array in struct icmsg_negotiate
  hv_netvsc: Restrict configurations on isolated guests
  Drivers: hv: vmbus: Enforce 'VMBus version >= 5.2' on isolated guests
  ...
2021-02-21 13:24:39 -08:00
Linus Torvalds 2671fe5e1d - added support for Nintendo N64
- added support for Realtek RTL83XX SoCs
 - kaslr support for Loongson64
 - first steps to get rid of set_fs()
 - DMA runtime coherent/non-coherent selection cleanup
 - cleanups and fixes
 -----BEGIN PGP SIGNATURE-----
 
 iQJOBAABCAA4FiEEbt46xwy6kEcDOXoUeZbBVTGwZHAFAmAvmm8aHHRzYm9nZW5k
 QGFscGhhLmZyYW5rZW4uZGUACgkQeZbBVTGwZHCbwQ//aCn2l/GuXvKFuGkbTMSW
 tqrnN4WNVpqK96BHlbS1CLzBj1Qzf9znXq4SBuK2ga3Gks/WOrG9vcOhARX3k5C3
 dWi5TQzCKChjKmGxUij3mmIxE41L3vpZ2TOKCVVG8M+/0rMsWClNXfU/Bc9B4n4Y
 VhZsd3KEjI+SezWT6h1Hw4bmhq2OPTH4CzZMA6Dpq3gZjmNBj1z5SMtLM0XA60dL
 jkXYxYeMcPEWOoX69z2Gf1XFRWQNbCfnM3OHHeLeNo9eG4ZQbv4OlZLisXI81r71
 0DWe/b/RZM0NdkgfSUM+Yen8KPgj4JcfA3cM6yKZClmF0IvrvvC4LvEBmCSoSfId
 uQvPAwEoCFm0iuGhcL7XHCxL8QUKelrOWgzRzeMiVfX6XdSwW9evytjqQ5hYl5ov
 lwIfmuK6Zc/c9mGLzbYG4b73eW1Kwhb9g+wvJRK44rFHZh5ztoYPgoB5Y+ECo9zO
 nIfc9FjeyMIjLJEKSybYf8BZlyLUJPprUBLx0xHdL4cXCb62Im947F4d6uTwDyNI
 oprIptQBMcJUwxSdIyreH5KyuV0Kyb20akmUB0wo6lx1+ilAQ0UsP9zTIkM4ihEN
 Lu85RdX973iIJ9M9fS00LLOPn9Osu5QSMw0LcSHTr7Eme83WrfGY3juxf61SJcE4
 ZxYki79OFzK8gFxEjstFqpY=
 =kQfQ
 -----END PGP SIGNATURE-----

Merge tag 'mips_5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS updates from Thomas Bogendoerfer:

 - added support for Nintendo N64

 - added support for Realtek RTL83XX SoCs

 - kaslr support for Loongson64

 - first steps to get rid of set_fs()

 - DMA runtime coherent/non-coherent selection cleanup

 - cleanups and fixes

* tag 'mips_5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (98 commits)
  Revert "MIPS: Add basic support for ptrace single step"
  vmlinux.lds.h: catch more UBSAN symbols into .data
  MIPS: kernel: Drop kgdb_call_nmi_hook
  MAINTAINERS: Add git tree for KVM/mips
  MIPS: Use common way to parse elfcorehdr
  MIPS: Simplify EVA cache handling
  Revert "MIPS: kernel: {ftrace,kgdb}: Set correct address limit for cache flushes"
  MIPS: remove CONFIG_DMA_PERDEV_COHERENT
  MIPS: remove CONFIG_DMA_MAYBE_COHERENT
  driver core: lift dma_default_coherent into common code
  MIPS: refactor the runtime coherent vs noncoherent DMA indicators
  MIPS/alchemy: factor out the DMA coherent setup
  MIPS/malta: simplify plat_setup_iocoherency
  MIPS: Add basic support for ptrace single step
  MAINTAINERS: replace non-matching patterns for loongson{2,3}
  MIPS: Make check condition for SDBBP consistent with EJTAG spec
  mips: Replace lkml.org links with lore
  Revert "MIPS: microMIPS: Fix the judgment of mm_jr16_op and mm_jalr_op"
  MIPS: crash_dump.c: Simplify copy_oldmem_page()
  Revert "mips: Manually call fdt_init_reserved_mem() method"
  ...
2021-02-21 13:18:26 -08:00
Linus Torvalds 657bd90c93 Scheduler updates for v5.12:
[ NOTE: unfortunately this tree had to be freshly rebased today,
         it's a same-content tree of 82891be90f3c (-next published)
         merged with v5.11.
 
         The main reason for the rebase was an authorship misattribution
         problem with a new commit, which we noticed in the last minute,
         and which we didn't want to be merged upstream. The offending
         commit was deep in the tree, and dependent commits had to be
         rebased as well. ]
 
 - Core scheduler updates:
 
   - Add CONFIG_PREEMPT_DYNAMIC: this in its current form adds the
     preempt=none/voluntary/full boot options (default: full),
     to allow distros to build a PREEMPT kernel but fall back to
     close to PREEMPT_VOLUNTARY (or PREEMPT_NONE) runtime scheduling
     behavior via a boot time selection.
 
     There's also the /debug/sched_debug switch to do this runtime.
 
     This feature is implemented via runtime patching (a new variant of static calls).
 
     The scope of the runtime patching can be best reviewed by looking
     at the sched_dynamic_update() function in kernel/sched/core.c.
 
     ( Note that the dynamic none/voluntary mode isn't 100% identical,
       for example preempt-RCU is available in all cases, plus the
       preempt count is maintained in all models, which has runtime
       overhead even with the code patching. )
 
     The PREEMPT_VOLUNTARY/PREEMPT_NONE models, used by the vast majority
     of distributions, are supposed to be unaffected.
 
   - Fix ignored rescheduling after rcu_eqs_enter(). This is a bug that
     was found via rcutorture triggering a hang. The bug is that
     rcu_idle_enter() may wake up a NOCB kthread, but this happens after
     the last generic need_resched() check. Some cpuidle drivers fix it
     by chance but many others don't.
 
     In true 2020 fashion the original bug fix has grown into a 5-patch
     scheduler/RCU fix series plus another 16 RCU patches to address
     the underlying issue of missed preemption events. These are the
     initial fixes that should fix current incarnations of the bug.
 
   - Clean up rbtree usage in the scheduler, by providing & using the following
     consistent set of rbtree APIs:
 
      partial-order; less() based:
        - rb_add(): add a new entry to the rbtree
        - rb_add_cached(): like rb_add(), but for a rb_root_cached
 
      total-order; cmp() based:
        - rb_find(): find an entry in an rbtree
        - rb_find_add(): find an entry, and add if not found
 
        - rb_find_first(): find the first (leftmost) matching entry
        - rb_next_match(): continue from rb_find_first()
        - rb_for_each(): iterate a sub-tree using the previous two
 
   - Improve the SMP/NUMA load-balancer: scan for an idle sibling in a single pass.
     This is a 4-commit series where each commit improves one aspect of the idle
     sibling scan logic.
 
   - Improve the cpufreq cooling driver by getting the effective CPU utilization
     metrics from the scheduler
 
   - Improve the fair scheduler's active load-balancing logic by reducing the number
     of active LB attempts & lengthen the load-balancing interval. This improves
     stress-ng mmapfork performance.
 
   - Fix CFS's estimated utilization (util_est) calculation bug that can result in
     too high utilization values
 
 - Misc updates & fixes:
 
    - Fix the HRTICK reprogramming & optimization feature
    - Fix SCHED_SOFTIRQ raising race & warning in the CPU offlining code
    - Reduce dl_add_task_root_domain() overhead
    - Fix uprobes refcount bug
    - Process pending softirqs in flush_smp_call_function_from_idle()
    - Clean up task priority related defines, remove *USER_*PRIO and
      USER_PRIO()
    - Simplify the sched_init_numa() deduplication sort
    - Documentation updates
    - Fix EAS bug in update_misfit_status(), which degraded the quality
      of energy-balancing
    - Smaller cleanups
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmAtHBsRHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1itgg/+NGed12pgPjYBzesdou60Lvx7LZLGjfOt
 M1F1EnmQGn/hEH2fCY6ZoqIZQTVltm7GIcBNabzYTzlaHZsdtyuDUJBZyj19vTlk
 zekcj7WVt+qvfjChaNwEJhQ9nnOM/eohMgEOHMAAJd9zlnQvve7NOLQ56UDM+kn/
 9taFJ5ZPvb4avP6C5p3KivvKex6Bjof/Tl0m3utpNyPpI/qK3FyGxwdgCxU0yepT
 ABWQX5ZQCufFvo1bgnBPfqyzab4MqhoM3bNKBsLQfuAlssG1xRv4KQOev4dRwrt9
 pXJikV5C9yez5d2lGe5p0ltH5IZS/l9x2yI/ZQj3OUDTFyV1ic6WfFAqJgDzVF8E
 i/vvA4NPQiI241Bkps+ErcCw4aVOgiY6TWli74cHjLUIX0+As6aHrFWXGSxUmiHB
 WR+B8KmdfzRTTlhOxMA+cvlpZcKCfxWkJJmXzr/lDZzIuKPqM3QCE2wD9sixkfVo
 JNICT0IvZghWOdbMEfZba8Psh/e2LVI9RzdpEiuYJz1ZrVlt1hO0M6jBxY0hMz9n
 k54z81xODw0a8P2FHMtpmB1vhAeqCmvwA6DO8z0Oxs0DFi+KM2bLf2efHsCKafI+
 Bm5v9YFaOk/55R76hJVh+aYLlyFgFkKd+P/niJTPDnxOk3SqJuXvTrql1HeGHkNr
 kYgQa23dsZk=
 =pyaG
 -----END PGP SIGNATURE-----

Merge tag 'sched-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler updates from Ingo Molnar:
 "Core scheduler updates:

   - Add CONFIG_PREEMPT_DYNAMIC: this in its current form adds the
     preempt=none/voluntary/full boot options (default: full), to allow
     distros to build a PREEMPT kernel but fall back to close to
     PREEMPT_VOLUNTARY (or PREEMPT_NONE) runtime scheduling behavior via
     a boot time selection.

     There's also the /debug/sched_debug switch to do this runtime.

     This feature is implemented via runtime patching (a new variant of
     static calls).

     The scope of the runtime patching can be best reviewed by looking
     at the sched_dynamic_update() function in kernel/sched/core.c.

     ( Note that the dynamic none/voluntary mode isn't 100% identical,
       for example preempt-RCU is available in all cases, plus the
       preempt count is maintained in all models, which has runtime
       overhead even with the code patching. )

     The PREEMPT_VOLUNTARY/PREEMPT_NONE models, used by the vast
     majority of distributions, are supposed to be unaffected.

   - Fix ignored rescheduling after rcu_eqs_enter(). This is a bug that
     was found via rcutorture triggering a hang. The bug is that
     rcu_idle_enter() may wake up a NOCB kthread, but this happens after
     the last generic need_resched() check. Some cpuidle drivers fix it
     by chance but many others don't.

     In true 2020 fashion the original bug fix has grown into a 5-patch
     scheduler/RCU fix series plus another 16 RCU patches to address the
     underlying issue of missed preemption events. These are the initial
     fixes that should fix current incarnations of the bug.

   - Clean up rbtree usage in the scheduler, by providing & using the
     following consistent set of rbtree APIs:

       partial-order; less() based:
         - rb_add(): add a new entry to the rbtree
         - rb_add_cached(): like rb_add(), but for a rb_root_cached

       total-order; cmp() based:
         - rb_find(): find an entry in an rbtree
         - rb_find_add(): find an entry, and add if not found

         - rb_find_first(): find the first (leftmost) matching entry
         - rb_next_match(): continue from rb_find_first()
         - rb_for_each(): iterate a sub-tree using the previous two

   - Improve the SMP/NUMA load-balancer: scan for an idle sibling in a
     single pass. This is a 4-commit series where each commit improves
     one aspect of the idle sibling scan logic.

   - Improve the cpufreq cooling driver by getting the effective CPU
     utilization metrics from the scheduler

   - Improve the fair scheduler's active load-balancing logic by
     reducing the number of active LB attempts & lengthen the
     load-balancing interval. This improves stress-ng mmapfork
     performance.

   - Fix CFS's estimated utilization (util_est) calculation bug that can
     result in too high utilization values

  Misc updates & fixes:

   - Fix the HRTICK reprogramming & optimization feature

   - Fix SCHED_SOFTIRQ raising race & warning in the CPU offlining code

   - Reduce dl_add_task_root_domain() overhead

   - Fix uprobes refcount bug

   - Process pending softirqs in flush_smp_call_function_from_idle()

   - Clean up task priority related defines, remove *USER_*PRIO and
     USER_PRIO()

   - Simplify the sched_init_numa() deduplication sort

   - Documentation updates

   - Fix EAS bug in update_misfit_status(), which degraded the quality
     of energy-balancing

   - Smaller cleanups"

* tag 'sched-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (51 commits)
  sched,x86: Allow !PREEMPT_DYNAMIC
  entry/kvm: Explicitly flush pending rcuog wakeup before last rescheduling point
  entry: Explicitly flush pending rcuog wakeup before last rescheduling point
  rcu/nocb: Trigger self-IPI on late deferred wake up before user resume
  rcu/nocb: Perform deferred wake up before last idle's need_resched() check
  rcu: Pull deferred rcuog wake up to rcu_eqs_enter() callers
  sched/features: Distinguish between NORMAL and DEADLINE hrtick
  sched/features: Fix hrtick reprogramming
  sched/deadline: Reduce rq lock contention in dl_add_task_root_domain()
  uprobes: (Re)add missing get_uprobe() in __find_uprobe()
  smp: Process pending softirqs in flush_smp_call_function_from_idle()
  sched: Harden PREEMPT_DYNAMIC
  static_call: Allow module use without exposing static_call_key
  sched: Add /debug/sched_preempt
  preempt/dynamic: Support dynamic preempt with preempt= boot option
  preempt/dynamic: Provide irqentry_exit_cond_resched() static call
  preempt/dynamic: Provide preempt_schedule[_notrace]() static calls
  preempt/dynamic: Provide cond_resched() and might_resched() static calls
  preempt: Introduce CONFIG_PREEMPT_DYNAMIC
  static_call: Provide DEFINE_STATIC_CALL_RET0()
  ...
2021-02-21 12:35:04 -08:00
Linus Torvalds 7b15c27e2f These changes fix MM (soft-)dirty bit management in the procfs code & clean up the API.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmAtAgsRHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1gOnA/9GKJblgi88Qb23YwGKp0OfCMdLfx8FJa+
 dq0AB0jgzc8v2J8IITSs/qo/8o25IE9IPTjTfItn0E0jxz7Y8J16urb/vyWX6O2s
 jb4riT5fIRCXvhv9DooxSQerZePaOJXbHYa2BBk8yqNJPGbd5kr0SUGn3BQnBQhR
 0yAfqjrzBLMGzzSO+kK0nhGQH8BJZgYu94CHNnUZJtWcIb2ZC6lzZ7Lz0zi6ueRJ
 81JblV4NCOC9uy9I9odOwESu2TIxT9afq1C/6COyrKYx3sWY6xPOGQTxYZe1LITE
 lb57/95qc7SOIj7Y3aL4YRSVRYRihEU31qlAltwP4fEnz49qdHJOR1HQmjKVG8xs
 Uaa6kCYFeTKmh4SRRr8ZR/hUkebrFUT+9+db6LmBs/i4Kt09T+ZurXC4jqmUHMFn
 2nYCDH6RX153V1YwcHGkr4OWaUVWZwAZl+t0zIo7o7wQdkoAD75ydecW2R3nLMN7
 p1ofGPXmT8Wh4en8LngBawO/4bBuunezh4L3vpz0/EU3viK5+DRsyNKf+d+Tti28
 XCe7ID0GDGq7nIzSZxuyIxmAbWJxjI+7gWT2WUudrJxJ2rUUxPQms8GsQD54IMh5
 UILv9GMBNuV8iA/2c3B52ff5iFl7kp+SxVS3MRC6zTudIV9VV6bb7WpFb8FLOhsH
 3sEo0qDFab4=
 =qcXO
 -----END PGP SIGNATURE-----

Merge tag 'core-mm-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull tlb gather updates from Ingo Molnar:
 "Theses fix MM (soft-)dirty bit management in the procfs code & clean
  up the TLB gather API"

* tag 'core-mm-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/ldt: Use tlb_gather_mmu_fullmm() when freeing LDT page-tables
  tlb: arch: Remove empty __tlb_remove_tlb_entry() stubs
  tlb: mmu_gather: Remove start/end arguments from tlb_gather_mmu()
  tlb: mmu_gather: Introduce tlb_gather_mmu_fullmm()
  tlb: mmu_gather: Remove unused start/end arguments from tlb_finish_mmu()
  mm: proc: Invalidate TLB after clearing soft-dirty page state
2021-02-21 12:19:56 -08:00
Linus Torvalds 02f9fc286e Power management updates for 5.12-rc1
- Add new power capping facility called DTPM (Dynamic Thermal Power
    Management), based on the existing power capping framework, to
    allow aggregate power constraints to be applied to sets of devices
    in a distributed manner, along with a CPU backend driver based on
    the Energy Model (Daniel Lezcano, Dan Carpenter, Colin Ian King).
 
  - Add AlderLake Mobile support to the Intel RAPL power capping
    driver and make it use the topology interface when laying out the
    system topology (Zhang Rui, Yunfeng Ye).
 
  - Drop the cpufreq tango driver belonging to a platform that is not
    supported any more (Arnd Bergmann).
 
  - Drop the redundant CPUFREQ_STICKY and CPUFREQ_PM_NO_WARN cpufreq
    driver flags (Viresh Kumar).
 
  - Update cpufreq drivers:
 
    * Fix max CPU frequency discovery in the intel_pstate driver and
      make janitorial changes in it (Chen Yu, Rafael Wysocki, Nigel
      Christian).
 
    * Fix resource leaks in the brcmstb-avs-cpufreq driver (Christophe
      JAILLET).
 
    * Make the tegra20 driver use the resource-managed API (Dmitry
      Osipenko).
 
    * Enable boost support in the qcom-hw driver (Shawn Guo).
 
  - Update the operating performance points (OPP) framework:
 
    * Clean up the OPP core (Dmitry Osipenko, Viresh Kumar).
 
    * Extend the OPP API by adding new helpers to it (Dmitry Osipenko,
      Viresh Kumar).
 
    * Allow required OPPs to be used for devfreq devices and update
      the devfreq governor code accordingly (Saravana Kannan).
 
    * Prepare the framework for introducing new dev_pm_opp_set_opp()
      helper (Viresh Kumar).
 
    * Drop dev_pm_opp_set_bw() and update related drivers (Viresh
      Kumar).
 
    * Allow lazy linking of required-OPPs (Viresh Kumar).
 
  - Simplify and clean up devfreq somewhat (Lukasz Luba, Yang Li,
    Pierre Kuo).
 
  - Update the generic power domains (genpd) framework:
 
    * Use device's next wakeup to determine domain idle state (Lina
      Iyer).
 
    * Improve initialization and debug (Dmitry Osipenko).
 
    * Simplify computations (Abaci Team).
 
  - Make janitorial changes in the core code handling system sleep
    and PM-runtime (Bhaskar Chowdhury, Bjorn Helgaas, Rikard Falkeborn,
    Zqiang).
 
  - Update the MAINTAINERS entry for the exynos cpuidle driver and
    drop DEBUG definition from intel_idle (Krzysztof Kozlowski, Tom
    Rix).
 
  - Extend the PM clock layer to cover clocks that must sleep (Nicolas
    Pitre).
 
  - Update the cpupower utility:
 
    * Update cpupower command, add support for AMD family 0x19 and clean
      up the code to remove many of the family checks to make future
      family updates easier (Nathan Fontenot, Robert Richter).
 
    * Add Makefile dependencies for install targets to allow building
      cpupower in parallel rather than serially (Ivan Babrou).
 
  - Make janitorial changes in power management Kconfig (Lukasz Luba).
 -----BEGIN PGP SIGNATURE-----
 
 iQJGBAABCAAwFiEE4fcc61cGeeHD/fCwgsRv/nhiVHEFAmAquvMSHHJqd0Byand5
 c29ja2kubmV0AAoJEILEb/54YlRx7MEQAIFx7WGu0TquvYYbX1Op4oxHaN5wLZba
 XZjh5g4dSn+fKF+WXO4+Ze8VwFx2E6p2650OYJ9A3H83yqjWz5x0CoYm++LTWkWJ
 CRPhyAL2JzrqDL2oJ/7XdK41cz/DT1p2B5cdOVeI4OaLhTzLa4TAO3EwCA/Eyayb
 qumbp6vt3G3zfSDLMA8Wa/HDNaWcN0/NDdnhlj9zlT27COyFJJUARa1jGA/5+2BK
 k/LP7homFIPf8vTGMkL/JuHU7Fsqa2vCFEzB22xyD8GE59dHoXYTlKA2pOr/2lJM
 VV5h0FDS6lFbkp6AQDHwh5tsGusT7dREFXebBUWtmETZmB9iQZXAo4k+MnUbYGSt
 stYFdDJpQkK42icF7uhJE1xuZkQ16xBm02pBvlJWMSyYyHCHhUH83VxhA11szA5/
 glLHfhhdbAa1BKmFHuTEZiwCAssY+YmoAvUpgLW04csJ4s4+my7VCgVe6jOILv2H
 0PdakYam/UEXPoDR4bAdJePZQvwbeUQUtmZ/oYb7Ab2ztfFcpVtZ5T0QeKazXkiZ
 BDtJ+XQJAhZOmLL4u2owGdevvjQU+68QZF1NfMoOTW2K7bcok3pVjj5uKRkfir6F
 R74mzHNNKOWBO9NwByinrMNJqHqPxfbREvg92Xi7GGDtt+rD7/K3K4Au+9W9MxwL
 AvUhPGadUZT1
 =9xhj
 -----END PGP SIGNATURE-----

Merge tag 'pm-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "These add a new power capping facility allowing aggregate power
  constraints to be applied to sets of devices in a distributed manner,
  add a new CPU ID to the RAPL power capping driver and improve it, drop
  a cpufreq driver belonging to a platform that is not supported any
  more, drop two redundant cpufreq driver flags, update cpufreq drivers
  (intel_pstate, brcmstb-avs, qcom-hw), update the operating performance
  points (OPP) framework (code cleanups, new helpers, devfreq-related
  modifications), clean up devfreq, extend the PM clock layer, update
  the cpupower utility and make assorted janitorial changes.

  Specifics:

   - Add new power capping facility called DTPM (Dynamic Thermal Power
     Management), based on the existing power capping framework, to
     allow aggregate power constraints to be applied to sets of devices
     in a distributed manner, along with a CPU backend driver based on
     the Energy Model (Daniel Lezcano, Dan Carpenter, Colin Ian King).

   - Add AlderLake Mobile support to the Intel RAPL power capping driver
     and make it use the topology interface when laying out the system
     topology (Zhang Rui, Yunfeng Ye).

   - Drop the cpufreq tango driver belonging to a platform that is not
     supported any more (Arnd Bergmann).

   - Drop the redundant CPUFREQ_STICKY and CPUFREQ_PM_NO_WARN cpufreq
     driver flags (Viresh Kumar).

   - Update cpufreq drivers:

      * Fix max CPU frequency discovery in the intel_pstate driver and
        make janitorial changes in it (Chen Yu, Rafael Wysocki, Nigel
        Christian).

      * Fix resource leaks in the brcmstb-avs-cpufreq driver (Christophe
        JAILLET).

      * Make the tegra20 driver use the resource-managed API (Dmitry
        Osipenko).

      * Enable boost support in the qcom-hw driver (Shawn Guo).

   - Update the operating performance points (OPP) framework:

      * Clean up the OPP core (Dmitry Osipenko, Viresh Kumar).

      * Extend the OPP API by adding new helpers to it (Dmitry Osipenko,
        Viresh Kumar).

      * Allow required OPPs to be used for devfreq devices and update
        the devfreq governor code accordingly (Saravana Kannan).

      * Prepare the framework for introducing new dev_pm_opp_set_opp()
        helper (Viresh Kumar).

      * Drop dev_pm_opp_set_bw() and update related drivers (Viresh
        Kumar).

      * Allow lazy linking of required-OPPs (Viresh Kumar).

   - Simplify and clean up devfreq somewhat (Lukasz Luba, Yang Li,
     Pierre Kuo).

   - Update the generic power domains (genpd) framework:

      * Use device's next wakeup to determine domain idle state (Lina
        Iyer).

      * Improve initialization and debug (Dmitry Osipenko).

      * Simplify computations (Abaci Team).

   - Make janitorial changes in the core code handling system sleep and
     PM-runtime (Bhaskar Chowdhury, Bjorn Helgaas, Rikard Falkeborn,
     Zqiang).

   - Update the MAINTAINERS entry for the exynos cpuidle driver and drop
     DEBUG definition from intel_idle (Krzysztof Kozlowski, Tom Rix).

   - Extend the PM clock layer to cover clocks that must sleep (Nicolas
     Pitre).

   - Update the cpupower utility:

      * Update cpupower command, add support for AMD family 0x19 and
        clean up the code to remove many of the family checks to make
        future family updates easier (Nathan Fontenot, Robert Richter).

      * Add Makefile dependencies for install targets to allow building
        cpupower in parallel rather than serially (Ivan Babrou).

   - Make janitorial changes in power management Kconfig (Lukasz Luba)"

* tag 'pm-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (89 commits)
  MAINTAINERS: cpuidle: exynos: include header in file pattern
  powercap: intel_rapl: Use topology interface in rapl_init_domains()
  powercap: intel_rapl: Use topology interface in rapl_add_package()
  PM: sleep: Constify static struct attribute_group
  PM: Kconfig: remove unneeded "default n" options
  PM: EM: update Kconfig description and drop "default n" option
  cpufreq: Remove unused flag CPUFREQ_PM_NO_WARN
  cpufreq: Remove CPUFREQ_STICKY flag
  PM / devfreq: Add required OPPs support to passive governor
  PM / devfreq: Cache OPP table reference in devfreq
  OPP: Add function to look up required OPP's for a given OPP
  PM / devfreq: rk3399_dmc: Remove unneeded semicolon
  opp: Replace ENOTSUPP with EOPNOTSUPP
  opp: Fix "foo * bar" should be "foo *bar"
  opp: Don't ignore clk_get() errors other than -ENOENT
  opp: Update bandwidth requirements based on scaling up/down
  opp: Allow lazy-linking of required-opps
  opp: Remove dev_pm_opp_set_bw()
  devfreq: tegra30: Migrate to dev_pm_opp_set_opp()
  drm: msm: Migrate to dev_pm_opp_set_opp()
  ...
2021-02-20 21:42:18 -08:00
Linus Torvalds 584ce3c9b4 SoC platform removal
There are a lot of platforms that have not seen any interesting code
 changes in the past five years or more.
 
 I made a list and asked around which ones are no longer in use [1], and
 received confirmation about six ARM platforms and the TI C6x architecture
 that have all reached the end of their life upstream, with no known
 users remaining:
 
  - efm32 -- added in 2011, first Cortex-M, no notable changes after 2013
  - picoxcell -- added in 2011, abandoned after 2012 acquisition
  - prima2 -- added in 20111, no notable changes since 2015
  - tango -- added in 2015, sporadic changes until 2017, but abandoned
  - u300 -- added in 2009, no notable changes since 2013
  - zx --added in 2015 for both 32, 2017 for 64 bit, no notable changes
  - arch/c6x -- added in 2011, but work stalled soon after that
 
 A number of other platforms on the original list turned out to still
 have users. In some cases there are out-of-tree patches and users
 that plan to contribute them in the future, in other cases the code
 is complete and works reliably.
 
 [1] https://lore.kernel.org/lkml/CAK8P3a2DZ8xQp7R=H=wewHnT2=a_=M53QsZOueMVEf7tOZLKNg@mail.gmail.com/
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEiK/NIGsWEZVxh/FrYKtH/8kJUicFAmApiR8ACgkQYKtH/8kJ
 Uifl7A//RZVyxUSlbD/StS6oEOmkZH8j0L7yeYOKkSHGZI+6Dqxo6rooKymbeflk
 jJvDVQqLcrclT/7rWsKesdN8aW+ilfWrby5nDsWivsROrTw3DdvZgkjh7KYz7tA/
 OxygKQu4W9I+ywJltR4ykTUxXohjU+duHPuZJawQk64xE3Q0MWxJlQQ2kHJYVJRu
 /rWgNDQaI2d8HFhhEVsn4PC0RLWfUuBevKEuRYqZwM/oB/HuYjY+uTUGe2RhlgWb
 sbcoD93JP2MghSypq33/UtEl4Uk7Wpdv2bshTTv8DL5ToltY7wD8qIIh+aSJk9hP
 0FG3NTia7e9dqQQR2bskspGxP73iIuSN1exAbm/Ten5sysy6IsESmzqZRxXv+7Z1
 q1Oyc4wYaotJPAxMOE00RMLiRa5domI8V6Y10I5uyOcmpRvwWK2WfCOE7D3WSQ5M
 i1JiqLnC5JtJ0vyVBeRKo99zZImeXXrmS0n+fcARGtcKwAqKSvKxFcLTmkj3KqHv
 L4Xgy5f83QrMZWmldX7IiwWjTar2geBM7pFgG/z3R6JqkaxWiDHxyok6j1WUCE7b
 MViRZ8wT7JC5sIkHuwXZ4jvAXPqHq6J1rmJreU6N/jzmv/PTQoUnQ3C/MbDNhuv8
 NDVSRgrPcd/T0BrBkzIWk3t+Oh6ikDgflWsWkqIRFG0vCNx+KdM=
 =pf3b
 -----END PGP SIGNATURE-----

Merge tag 'arm-platform-removal-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC platform removals from Arnd Bergmann:
 "There are a lot of platforms that have not seen any interesting code
  changes in the past five years or more.

  I made a list and asked around which ones are no longer in use, and
  received confirmation about six ARM platforms and the TI C6x
  architecture that have all reached the end of their life upstream,
  with no known users remaining:

   - efm32 - added in 2011, first Cortex-M, no notable changes after 2013

   - picoxcell - added in 2011, abandoned after 2012 acquisition

   - prima2 - added in 20111, no notable changes since 2015

   - tango - added in 2015, sporadic changes until 2017, but abandoned

   - u300 - added in 2009, no notable changes since 2013

   - zx - added in 2015 for both 32, 2017 for 64 bit, no notable changes

   - arch/c6x - added in 2011, but work stalled soon after that

  A number of other platforms on the original list turned out to still
  have users. In some cases there are out-of-tree patches and users that
  plan to contribute them in the future, in other cases the code is
  complete and works reliably"

Link: https://lore.kernel.org/lkml/CAK8P3a2DZ8xQp7R=H=wewHnT2=a_=M53QsZOueMVEf7tOZLKNg@mail.gmail.com/

* tag 'arm-platform-removal-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: remove u300 platform
  ARM: remove tango platform
  ARM: remove zte zx platform
  ARM: remove sirf prima2/atlas platforms
  c6x: remove architecture
  MAINTAINERS: Remove deleted platform efm32
  ARM: drop efm32 platform
  ARM: Remove PicoXcell platform support
  ARM: dts: Remove PicoXcell platforms
2021-02-20 18:16:30 -08:00
Josh Poimboeuf 73f44fe19d static_call: Allow module use without exposing static_call_key
When exporting static_call_key; with EXPORT_STATIC_CALL*(), the module
can use static_call_update() to change the function called.  This is
not desirable in general.

Not exporting static_call_key however also disallows usage of
static_call(), since objtool needs the key to construct the
static_call_site.

Solve this by allowing objtool to create the static_call_site using
the trampoline address when it builds a module and cannot find the
static_call_key symbol. The module loader will then try and map the
trampole back to a key before it constructs the normal sites list.

Doing this requires a trampoline -> key associsation, so add another
magic section that keeps those.

Originally-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20210127231837.ifddpn7rhwdaepiu@treble
2021-02-17 14:12:42 +01:00
Alexander Lobakin fa07eca8d8 vmlinux.lds.h: catch more UBSAN symbols into .data
LKP triggered lots of LD orphan warnings [0]:

mipsel-linux-ld: warning: orphan section `.data.$Lubsan_data299' from
`init/do_mounts_rd.o' being placed in section `.data.$Lubsan_data299'
mipsel-linux-ld: warning: orphan section `.data.$Lubsan_data183' from
`init/do_mounts_rd.o' being placed in section `.data.$Lubsan_data183'
mipsel-linux-ld: warning: orphan section `.data.$Lubsan_type3' from
`init/do_mounts_rd.o' being placed in section `.data.$Lubsan_type3'
mipsel-linux-ld: warning: orphan section `.data.$Lubsan_type2' from
`init/do_mounts_rd.o' being placed in section `.data.$Lubsan_type2'
mipsel-linux-ld: warning: orphan section `.data.$Lubsan_type0' from
`init/do_mounts_rd.o' being placed in section `.data.$Lubsan_type0'

[...]

Seems like "unnamed data" isn't the only type of symbols that UBSAN
instrumentation can emit.
Catch these into .data with the wildcard as well.

[0] https://lore.kernel.org/linux-mm/202102160741.k57GCNSR-lkp@intel.com

Fixes: f41b233de0 ("vmlinux.lds.h: catch UBSAN's "unnamed data" into data")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-16 17:10:48 +01:00
Nick Desaulniers 3c4fa46b30 vmlinux.lds.h: add DWARF v5 sections
We expect toolchains to produce these new debug info sections as part of
DWARF v5. Add explicit placements to prevent the linker warnings from
--orphan-section=warn.

Compilers may produce such sections with explicit -gdwarf-5, or based on
the implicit default version of DWARF when -g is used via DEBUG_INFO.
This implicit default changes over time, and has changed to DWARF v5
with GCC 11.

.debug_sup was mentioned in review, but without compilers producing it
today, let's wait to add it until it becomes necessary.

Cc: stable@vger.kernel.org
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1922707
Reported-by: Chris Murphy <lists@colorremedies.com>
Suggested-by: Fangrui Song <maskray@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Mark Wielaard <mark@klomp.org>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2021-02-16 12:01:45 +09:00
Rafael J. Wysocki a9a939cb34 Merge branches 'powercap' and 'pm-misc'
* powercap:
  powercap: intel_rapl: Use topology interface in rapl_init_domains()
  powercap: intel_rapl: Use topology interface in rapl_add_package()
  powercap/intel_rapl: add support for AlderLake Mobile
  powercap/drivers/dtpm: Fix size of object being allocated
  powercap/drivers/dtpm: Fix an IS_ERR() vs NULL check
  powercap/drivers/dtpm: Fix some missing unlock bugs
  powercap/drivers/dtpm: Fix a double shift bug
  powercap/drivers/dtpm: Fix __udivdi3 and __aeabi_uldivmod unresolved symbols
  powercap/drivers/dtpm: Add CPU energy model based support
  powercap/drivers/dtpm: Add API for dynamic thermal power management
  Documentation/powercap/dtpm: Add documentation for dtpm
  units: Add Watt units

* pm-misc:
  PM: Kconfig: remove unneeded "default n" options
  PM: EM: update Kconfig description and drop "default n" option
2021-02-15 18:50:01 +01:00
Christophe Leroy 731ecea3e5 mm: Remove arch_remap() and mm-arch-hooks.h
powerpc was the last provider of arch_remap() and the last
user of mm-arch-hooks.h.

Since commit 526a9c4a72 ("powerpc/vdso: Provide vdso_remap()"),
arch_remap() hence mm-arch-hooks.h are not used anymore.

Remove them.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Richard Weinberger <richard@nod.at>
2021-02-12 21:27:43 +01:00
Paolo Bonzini 8c6e67bec3 KVM/arm64 updates for Linux 5.12
- Make the nVHE EL2 object relocatable, resulting in much more
   maintainable code
 - Handle concurrent translation faults hitting the same page
   in a more elegant way
 - Support for the standard TRNG hypervisor call
 - A bunch of small PMU/Debug fixes
 - Allow the disabling of symbol export from assembly code
 - Simplification of the early init hypercall handling
 -----BEGIN PGP SIGNATURE-----
 
 iQJDBAABCgAtFiEEn9UcU+C1Yxj9lZw9I9DQutE9ekMFAmAmjqEPHG1hekBrZXJu
 ZWwub3JnAAoJECPQ0LrRPXpDoUEQAIrJ7YF4v4gz06a0HG9+b6fbmykHyxlG7jfm
 trvctfaiKzOybKoY5odPpNFzhbYOOdXXqYipyTHGwBYtGSy9G/9SjMKSUrfln2Ni
 lr1wBqapr9TE+SVKoR8pWWuZxGGbHVa7brNuMbMsMi1wwAsM2/n70H9PXrdq3QiK
 Ge1DWLso2oEfhtTwqNKa4dwB2MHjBhBFhhq+Nq5pslm6mmxJaYqz7pyBmw/C+2cc
 oU/6kpAa1yPAauptWXtYXJYOMHihxgEa1IdK3Gl0hUyFyu96xVkwH/KFsj+bRs23
 QGGCSdy4313hzaoGaSOTK22R98Aeg0wI9a6tcCBvVVjTAztnlu1FPtUZr8e/F7uc
 +r8xVJUJFiywt3Zktf/D7YDK9LuMMqFnj0BkI4U9nIBY59XZRNhENsBCmjru5lnL
 iXa5cuta03H4emfssIChLpgn0XHFas6t5dFXBPGbXyw0qsQchTw98iQX9LVxefUK
 rOUGPIN4nE9ESRIZe0SPlAVeCtNP8cLH7+0YG9MJ1QeDVYaUsnvy9Ln/ox+514mR
 5y2KJ6y7xnLB136SKCzPDDloYtz7BDiJq6a/RPiXKGheKoxy+N+BSe58yWCqFZYE
 Fx/cGUr7oSg39U7gCboog6BDp5e2CXBfbRllg6P47bZFfdPNwzNEzHvk49VltMxx
 Rl2W05bk
 =6EwV
 -----END PGP SIGNATURE-----

Merge tag 'kvmarm-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 updates for Linux 5.12

- Make the nVHE EL2 object relocatable, resulting in much more
  maintainable code
- Handle concurrent translation faults hitting the same page
  in a more elegant way
- Support for the standard TRNG hypervisor call
- A bunch of small PMU/Debug fixes
- Allow the disabling of symbol export from assembly code
- Simplification of the early init hypercall handling
2021-02-12 11:23:44 -05:00
Ingo Molnar a3251c1a36 Merge branch 'x86/paravirt' into x86/entry
Merge in the recent paravirt changes to resolve conflicts caused
by objtool annotations.

Conflicts:
	arch/x86/xen/xen-asm.S

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2021-02-12 13:36:43 +01:00
Waiman Long d8d0da4eee locking/arch: Move qrwlock.h include after qspinlock.h
include/asm-generic/qrwlock.h was trying to get arch_spin_is_locked via
asm-generic/qspinlock.h.  However, this does not work because architectures
might be using queued rwlocks but not queued spinlocks (csky), or because they
might be defining their own queued_* macros before including asm/qspinlock.h.

To fix this, ensure that asm/spinlock.h always includes qrwlock.h after
defining arch_spin_is_locked (either directly for csky, or via
asm/qspinlock.h for other architectures).  The only inclusion elsewhere
is in kernel/locking/qrwlock.c.  That one is really unnecessary because
the file is only compiled in SMP configurations (config QUEUED_RWLOCKS
depends on SMP) and in that case linux/spinlock.h already includes
asm/qrwlock.h if needed, via asm/spinlock.h.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Waiman Long <longman@redhat.com>
Fixes: 26128cb6c7 ("locking/rwlocks: Add contention detection for rwlocks")
Tested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Ben Gardon <bgardon@google.com>
[Add arch/sparc and kernel/locking parts per discussion with Waiman. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-02-11 07:59:54 -05:00
Wei Liu 466a9c3f88 asm-generic/hyperv: import data structures for mapping device interrupts
Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Co-Developed-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210203150435.27941-15-wei.liu@kernel.org
2021-02-11 08:47:06 +00:00
Wei Liu 12434e5fb6 asm-generic/hyperv: introduce hv_device_id and auxiliary structures
We will need to identify the device we want Microsoft Hypervisor to
manipulate.  Introduce the data structures for that purpose.

They will be used in a later patch.

Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Co-Developed-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210203150435.27941-14-wei.liu@kernel.org
2021-02-11 08:47:06 +00:00
Wei Liu b59fb7b60d asm-generic/hyperv: update hv_interrupt_entry
We will soon use the same structure to handle IO-APIC interrupts as
well. Introduce an enum to identify the source and a data structure for
IO-APIC RTE.

While at it, update pci-hyperv.c to use the enum.

No functional change.

Signed-off-by: Wei Liu <wei.liu@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210203150435.27941-13-wei.liu@kernel.org
2021-02-11 08:47:06 +00:00
Wei Liu d589ae61bc asm-generic/hyperv: update hv_msi_entry
We will soon need to access fields inside the MSI address and MSI data
fields. Introduce hv_msi_address_register and hv_msi_data_register.

Fix up one user of hv_msi_entry in mshyperv.h.

No functional change expected.

Signed-off-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210203150435.27941-12-wei.liu@kernel.org
2021-02-11 08:47:06 +00:00
Wei Liu 86b5ec3552 x86/hyperv: provide a bunch of helper functions
They are used to deposit pages into Microsoft Hypervisor and bring up
logical and virtual processors.

Signed-off-by: Lillian Grassin-Drake <ligrassi@microsoft.com>
Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Co-Developed-by: Lillian Grassin-Drake <ligrassi@microsoft.com>
Co-Developed-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Co-Developed-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210203150435.27941-10-wei.liu@kernel.org
2021-02-11 08:47:06 +00:00
Wei Liu 99a0f46af6 x86/hyperv: extract partition ID from Microsoft Hypervisor if necessary
We will need the partition ID for executing some hypercalls later.

Signed-off-by: Lillian Grassin-Drake <ligrassi@microsoft.com>
Co-Developed-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210203150435.27941-7-wei.liu@kernel.org
2021-02-11 08:47:06 +00:00
Wei Liu 8f1d14cb83 asm-generic/hyperv: change HV_CPU_POWER_MANAGEMENT to HV_CPU_MANAGEMENT
This makes the name match Hyper-V TLFS.

Signed-off-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210203150435.27941-2-wei.liu@kernel.org
2021-02-11 08:47:05 +00:00
Andrea Parri (Microsoft) a6c76bb08d x86/hyperv: Load/save the Isolation Configuration leaf
If bit 22 of Group B Features is set, the guest has access to the
Isolation Configuration CPUID leaf.  On x86, the first four bits
of EAX in this leaf provide the isolation type of the partition;
we entail three isolation types: 'SNP' (hardware-based isolation),
'VBS' (software-based isolation), and 'NONE' (no isolation).

Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: x86@kernel.org
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/r/20210201144814.2701-2-parri.andrea@gmail.com
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2021-02-11 08:47:05 +00:00
Thomas Gleixner db1cc7aede softirq: Move do_softirq_own_stack() to generic asm header
To avoid include recursion hell move the do_softirq_own_stack() related
content into a generic asm header and include it from all places in arch/
which need the prototype.

This allows architectures to provide an inline implementation of
do_softirq_own_stack() without introducing a lot of #ifdeffery all over the
place.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210210002513.289960691@linutronix.de
2021-02-10 23:34:16 +01:00
Fangrui Song 793f49a87a firmware_loader: align .builtin_fw to 8
arm64 references the start address of .builtin_fw (__start_builtin_fw)
with a pair of R_AARCH64_ADR_PREL_PG_HI21/R_AARCH64_LDST64_ABS_LO12_NC
relocations.  The compiler is allowed to emit the
R_AARCH64_LDST64_ABS_LO12_NC relocation because struct builtin_fw in
include/linux/firmware.h is 8-byte aligned.

The R_AARCH64_LDST64_ABS_LO12_NC relocation requires the address to be a
multiple of 8, which may not be the case if .builtin_fw is empty.
Unconditionally align .builtin_fw to fix the linker error.  32-bit
architectures could use ALIGN(4) but that would add unnecessary
complexity, so just use ALIGN(8).

Link: https://lkml.kernel.org/r/20201208054646.2913063-1-maskray@google.com
Link: https://github.com/ClangBuiltLinux/linux/issues/1204
Fixes: 5658c76 ("firmware: allow firmware files to be built into kernel image")
Signed-off-by: Fangrui Song <maskray@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-02-09 17:26:44 -08:00
Christoph Hellwig 367948220f module: remove EXPORT_UNUSED_SYMBOL*
EXPORT_UNUSED_SYMBOL* is not actually used anywhere.  Remove the
unused functionality as we generally just remove unused code anyway.

Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
2021-02-08 12:28:07 +01:00
Christoph Hellwig f1c3d73e97 module: remove EXPORT_SYMBOL_GPL_FUTURE
As far as I can tell this has never been used at all, and certainly
not any time recently.

Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
2021-02-08 12:28:02 +01:00
Ben Gardon 26128cb6c7 locking/rwlocks: Add contention detection for rwlocks
rwlocks do not currently have any facility to detect contention
like spinlocks do. In order to allow users of rwlocks to better manage
latency, add contention detection for queued rwlocks.

CC: Ingo Molnar <mingo@redhat.com>
CC: Will Deacon <will@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Davidlohr Bueso <dbueso@suse.de>
Acked-by: Waiman Long <longman@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20210202185734.1680553-7-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-02-04 05:27:42 -05:00
Quentin Perret 54effa6532 asm-generic: export: Stub EXPORT_SYMBOL with __DISABLE_EXPORTS
It is currently possible to stub EXPORT_SYMBOL() macros in C code using
__DISABLE_EXPORTS, which is necessary to run in constrained environments
such as the EFI stub or the decompressor. But this currently doesn't
apply to exports from assembly, which can lead to somewhat confusing
situations.

Consolidate the __DISABLE_EXPORTS infrastructure by checking it from
asm-generic/export.h as well.

Signed-off-by: Quentin Perret <qperret@google.com>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210203141931.615898-2-qperret@google.com
2021-02-03 16:42:57 +00:00
Will Deacon d8b450530b tlb: mmu_gather: Introduce tlb_gather_mmu_fullmm()
Passing the range '0, -1' to tlb_gather_mmu() sets the 'fullmm' flag,
which indicates that the mm_struct being operated on is going away. In
this case, some architectures (such as arm64) can elide TLB invalidation
by ensuring that the TLB tag (ASID) associated with this mm is not
immediately reclaimed. Although this behaviour is documented in
asm-generic/tlb.h, it's subtle and easily missed.

Introduce tlb_gather_mmu_fullmm() to make it clearer that this is for the
entire mm and WARN() if tlb_gather_mmu() is called with the 'fullmm'
address range.

Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Yu Zhao <yuzhao@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lkml.kernel.org/r/20210127235347.1402-4-will@kernel.org
2021-01-29 20:02:29 +01:00
Arnd Bergmann a579fcfa8e c6x: remove architecture
The c6x architecture was added to the kernel in 2011 at a time when
running Linux on DSPs was widely seen as the logical evolution.
It appears the trend has gone back to running Linux on Arm based SoCs
with DSP, using a better supported software ecosystem, and having better
real-time behavior for the DSP code. An example of this is TI's own
Keystone2 platform.

The upstream kernel port appears to no longer have any users. Mark
Salter remained avaialable to review patches, but mentioned that
he no longer has access to working hardware himself. Without any
users, it's best to just remove the code completely to reduce the
work for cross-architecture code changes.

Many thanks to Mark for maintaining the code for the past ten years.

Link: https://lore.kernel.org/lkml/41dc7795afda9f776d8cd0d3075f776cf586e97c.camel@redhat.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-01-20 09:30:45 +01:00
Alexander Lobakin f41b233de0 vmlinux.lds.h: catch UBSAN's "unnamed data" into data
When building kernel with both LD_DEAD_CODE_DATA_ELIMINATION and
UBSAN, LLVM stack generates lots of "unnamed data" sections:

ld.lld: warning: net/built-in.a(netfilter/utils.o): (.data.$__unnamed_2)
is being placed in '.data.$__unnamed_2'
ld.lld: warning: net/built-in.a(netfilter/utils.o): (.data.$__unnamed_3)
is being placed in '.data.$__unnamed_3'
ld.lld: warning: net/built-in.a(netfilter/utils.o): (.data.$__unnamed_4)
is being placed in '.data.$__unnamed_4'
ld.lld: warning: net/built-in.a(netfilter/utils.o): (.data.$__unnamed_5)
is being placed in '.data.$__unnamed_5'

[...]

Also handle this by adding the related sections to generic definitions.

Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-01-15 15:27:54 +01:00
Alexander Lobakin 9a427556fb vmlinux.lds.h: catch compound literals into data and BSS
When building kernel with LD_DEAD_CODE_DATA_ELIMINATION, LLVM stack
generates separate sections for compound literals, just like in case
with enabled LTO [0]:

ld.lld: warning: drivers/built-in.a(mtd/nand/spi/gigadevice.o):
(.data..compoundliteral.14) is being placed in
'.data..compoundliteral.14'
ld.lld: warning: drivers/built-in.a(mtd/nand/spi/gigadevice.o):
(.data..compoundliteral.15) is being placed in
'.data..compoundliteral.15'
ld.lld: warning: drivers/built-in.a(mtd/nand/spi/gigadevice.o):
(.data..compoundliteral.16) is being placed in
'.data..compoundliteral.16'
ld.lld: warning: drivers/built-in.a(mtd/nand/spi/gigadevice.o):
(.data..compoundliteral.17) is being placed in
'.data..compoundliteral.17'

[...]

Handle this by adding the related sections to generic definitions
as suggested by Sami [0].

[0] https://lore.kernel.org/lkml/20201211184633.3213045-3-samitolvanen@google.com

Suggested-by: Sami Tolvanen <samitolvanen@google.com>
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-01-15 15:27:54 +01:00
Atish Patra ae3c107cd8
numa: Move numa implementation to common code
ARM64 numa implementation is generic enough that RISC-V can reuse that
implementation with very minor cosmetic changes. This will help both
ARM64 and RISC-V in terms of maintanace and feature improvement

Move the numa implementation code to common directory so that both ISAs
can reuse this. This doesn't introduce any function changes for ARM64.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2021-01-14 15:08:55 -08:00
Sami Tolvanen dc5723b02e kbuild: add support for Clang LTO
This change adds build system support for Clang's Link Time
Optimization (LTO). With -flto, instead of ELF object files, Clang
produces LLVM bitcode, which is compiled into native code at link
time, allowing the final binary to be optimized globally. For more
details, see:

  https://llvm.org/docs/LinkTimeOptimization.html

The Kconfig option CONFIG_LTO_CLANG is implemented as a choice,
which defaults to LTO being disabled. To use LTO, the architecture
must select ARCH_SUPPORTS_LTO_CLANG and support:

  - compiling with Clang,
  - compiling all assembly code with Clang's integrated assembler,
  - and linking with LLD.

While using CONFIG_LTO_CLANG_FULL results in the best runtime
performance, the compilation is not scalable in time or
memory. CONFIG_LTO_CLANG_THIN enables ThinLTO, which allows
parallel optimization and faster incremental builds. ThinLTO is
used by default if the architecture also selects
ARCH_SUPPORTS_LTO_CLANG_THIN:

  https://clang.llvm.org/docs/ThinLTO.html

To enable LTO, LLVM tools must be used to handle bitcode files, by
passing LLVM=1 and LLVM_IAS=1 options to make:

  $ make LLVM=1 LLVM_IAS=1 defconfig
  $ scripts/config -e LTO_CLANG_THIN
  $ make LLVM=1 LLVM_IAS=1

To prepare for LTO support with other compilers, common parts are
gated behind the CONFIG_LTO option, and LTO can be disabled for
specific files by filtering out CC_FLAGS_LTO.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20201211184633.3213045-3-samitolvanen@google.com
2021-01-14 08:21:08 -08:00
Arnd Bergmann c35a824c31 arm64: make atomic helpers __always_inline
With UBSAN enabled and building with clang, there are occasionally
warnings like

WARNING: modpost: vmlinux.o(.text+0xc533ec): Section mismatch in reference from the function arch_atomic64_or() to the variable .init.data:numa_nodes_parsed
The function arch_atomic64_or() references
the variable __initdata numa_nodes_parsed.
This is often because arch_atomic64_or lacks a __initdata
annotation or the annotation of numa_nodes_parsed is wrong.

for functions that end up not being inlined as intended but operating
on __initdata variables. Mark these as __always_inline, along with
the corresponding asm-generic wrappers.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210108092024.4034860-1-arnd@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2021-01-13 15:09:06 +00:00
Randy Dunlap 87dbc209ea local64.h: make <asm/local64.h> mandatory
Make <asm-generic/local64.h> mandatory in include/asm-generic/Kbuild and
remove all arch/*/include/asm/local64.h arch-specific files since they
only #include <asm-generic/local64.h>.

This fixes build errors on arch/c6x/ and arch/nios2/ for
block/blk-iocost.c.

Build-tested on 21 of 25 arch-es.  (tools problems on the others)

Yes, we could even rename <asm-generic/local64.h> to
<linux/local64.h> and change all #includes to use
<linux/local64.h> instead.

Link: https://lkml.kernel.org/r/20201227024446.17018-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <jacquiot.aurelien@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-29 15:36:49 -08:00
Daniel Lezcano a20d0ef97a powercap/drivers/dtpm: Add API for dynamic thermal power management
On the embedded world, the complexity of the SoC leads to an
increasing number of hotspots which need to be monitored and mitigated
as a whole in order to prevent the temperature to go above the
normative and legally stated 'skin temperature'.

Another aspect is to sustain the performance for a given power budget,
for example virtual reality where the user can feel dizziness if the
GPU performance is capped while a big CPU is processing something
else. Or reduce the battery charging because the dissipated power is
too high compared with the power consumed by other devices.

The userspace is the most adequate place to dynamically act on the
different devices by limiting their power given an application
profile: it has the knowledge of the platform.

These userspace daemons are in charge of the Dynamic Thermal Power
Management (DTPM).

Nowadays, the dtpm daemons are abusing the thermal framework as they
act on the cooling device state to force a specific and arbitrary
state without taking care of the governor decisions. Given the closed
loop of some governors that can confuse the logic or directly enter in
a decision conflict.

As the number of cooling device support is limited today to the CPU
and the GPU, the dtpm daemons have little control on the power
dissipation of the system. The out of tree solutions are hacking
around here and there in the drivers, in the frameworks to have
control on the devices. The common solution is to declare them as
cooling devices.

There is no unification of the power limitation unit, opaque states
are used.

This patch provides a way to create a hierarchy of constraints using
the powercap framework. The devices which are registered as power
limit-able devices are represented in this hierarchy as a tree. They
are linked together with intermediate nodes which are just there to
propagate the constraint to the children.

The leaves of the tree are the real devices, the intermediate nodes
are virtual, aggregating the children constraints and power
characteristics.

Each node have a weight on a 2^10 basis, in order to reflect the
percentage of power distribution of the children's node. This
percentage is used to dispatch the power limit to the children.

The weight is computed against the max power of the siblings.

This simple approach allows to do a fair distribution of the power
limit.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-12-22 19:50:40 +01:00
Linus Torvalds e2ae634014 RISC-V Patches for the 5.11 Merge Window, Part 1
We have a handful of new kernel features for 5.11:
 
 * Support for the contiguous memory allocator.
 * Support for IRQ Time Accounting
 * Support for stack tracing
 * Support for strict /dev/mem
 * Support for kernel section protection
 
 I'm being a bit conservative on the cutoff for this round due to the
 timing, so this is all the new development I'm going to take for this
 cycle (even if some of it probably normally would have been OK).  There
 are, however, some fixes on the list that I will likely be sending along
 either later this week or early next week.
 
 There is one issue in here: one of my test configurations
 (PREEMPT{,_DEBUG}=y) fails to boot on QEMU 5.0.0 (from April) as of the
 .text.init alignment patch.  With any luck we'll sort out the issue, but
 given how many bugs get fixed all over the place and how unrelated those
 features seem my guess is that we're just running into something that's
 been lurking for a while and has already been fixed in the newer QEMU
 (though I wouldn't be surprised if it's one of these implicit
 assumptions we have in the boot flow).  If it was hardware I'd be
 strongly inclined to look more closely, but given that users can upgrade
 their simulators I'm less worried about it.
 
 There are two merge conflicts, both in build files.  They're both a bit
 clunky: arch/riscv/Kconfig is out of order (I have a script that's
 supposed to keep them in order, I'll fix it) and lib/Makefile is out of
 order (though GENERIC_LIB here doesn't mean quite what it does above).
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEKzw3R0RoQ7JKlDp6LhMZ81+7GIkFAl/cHO4THHBhbG1lckBk
 YWJiZWx0LmNvbQAKCRAuExnzX7sYiTlmD/4uDyNHBM1XH/XD4fSEwTYJvGLqt/Jo
 vtrGR/fm0SlQFUKCcywSzxcVAeGn56CACbEIDYLuL4xXRJmbwEuaRrHVx2sEhS9p
 pNhy+wus/SgDz5EUAawMyR2AEWgzl77hY5T/+AAo4yv65SGGBfsIdz5noIVwGNqW
 r0g5cw2O99z0vwu1aSrK4isWHconG9MfQnnVyepPSh67pyWS4aUCr1K3vLiqD2dE
 XcgtwdcgzUIY5aEoJNrWo5qTrcaG8m6MRNCDAKJ6MKdDA2wdGIN868G0wQnoURRm
 Y+yW7w3P20kM0b87zH50jujTWg38NBKOfaXb0mAfawZMapL60veTVmvs2kNtFXCy
 F6JWRkgTiRnGY72FtRR0igWXT5M7fz0EiLFXLMItGcgj79TUget4l/3sRMN47S/O
 cA/WiwptJH3mh8IkL6z5ZxWEThdOrbFt8F1T+Gyq/ayblcPnJaLn/wrWoeOwviWR
 fvEC7smuF5SBTbWZK5tBOP21Nvhb7bfr49Sgr8Tvdjl15tz97qK+2tsLXwkBoQnJ
 wU45jcXfzr5wgiGBOQANRite5bLsJ0TuOrTgA5gsGpv+JSDGbpcJbm0833x00nX/
 3GsW5xr+vsLCvljgPAtKsyDNRlGQu908Gxrat2+s8u92bLr1bwn30uKL5h6i/n1w
 QgWATuPPGXZZdw==
 =GWIH
 -----END PGP SIGNATURE-----

Merge tag 'riscv-for-linus-5.11-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V updates from Palmer Dabbelt:
 "We have a handful of new kernel features for 5.11:

   - Support for the contiguous memory allocator.

   - Support for IRQ Time Accounting

   - Support for stack tracing

   - Support for strict /dev/mem

   - Support for kernel section protection

  I'm being a bit conservative on the cutoff for this round due to the
  timing, so this is all the new development I'm going to take for this
  cycle (even if some of it probably normally would have been OK). There
  are, however, some fixes on the list that I will likely be sending
  along either later this week or early next week.

  There is one issue in here: one of my test configurations
  (PREEMPT{,_DEBUG}=y) fails to boot on QEMU 5.0.0 (from April) as of
  the .text.init alignment patch.

  With any luck we'll sort out the issue, but given how many bugs get
  fixed all over the place and how unrelated those features seem my
  guess is that we're just running into something that's been lurking
  for a while and has already been fixed in the newer QEMU (though I
  wouldn't be surprised if it's one of these implicit assumptions we
  have in the boot flow). If it was hardware I'd be strongly inclined to
  look more closely, but given that users can upgrade their simulators
  I'm less worried about it"

* tag 'riscv-for-linus-5.11-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  arm64: Use the generic devmem_is_allowed()
  arm: Use the generic devmem_is_allowed()
  RISC-V: Use the new generic devmem_is_allowed()
  lib: Add a generic version of devmem_is_allowed()
  riscv: Fixed kernel test robot warning
  riscv: kernel: Drop unused clean rule
  riscv: provide memmove implementation
  RISC-V: Move dynamic relocation section under __init
  RISC-V: Protect all kernel sections including init early
  RISC-V: Align the .init.text section
  RISC-V: Initialize SBI early
  riscv: Enable ARCH_STACKWALK
  riscv: Make stack walk callback consistent with generic code
  riscv: Cleanup stacktrace
  riscv: Add HAVE_IRQ_TIME_ACCOUNTING
  riscv: Enable CMA support
  riscv: Ignore Image.* and loader.bin
  riscv: Clean up boot dir
  riscv: Fix compressed Image formats build
  RISC-V: Add kernel image sections to the resource tree
2020-12-18 10:43:07 -08:00
Linus Torvalds 157807123c asm-generic: mmu-context cleanup
This is a cleanup series from Nicholas Piggin, preparing for
 later changes. The asm/mmu_context.h header are generalized
 and common code moved to asm-gneneric/mmu_context.h.
 
 This saves a bit of code and makes it easier to change in
 the future.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEo6/YBQwIrVS28WGKmmx57+YAGNkFAl/Y1LsACgkQmmx57+YA
 GNm6kBAAq4/n6nuNnh6b9LhjXaZRG75gEyW7JvHl8KE5wmZHwDHqbwiQgU1b3lUs
 JJGbfKqi5ASKxNg6MpfYodmCOqeTUUYG0FUCb6lMhcxxMdfLTLYBvkNd6Y143M+T
 boi5b/iz+OUQdNPzlVeSsUEVsD59FIXmP/GhscWZN9VAyf/aLV2MDBIOhrDSJlPo
 ObexnP0Iw1E1NRQYDQ6L2dKTHa6XmHyUtw40ABPmd/6MSd1S+D+j3FGg+CYmvnzG
 k9g8FbNby8xtUfc0pZV4W/322WN8cDFF9bc04eTDZiAv1bk9lmfvWJ2bWjs3s2qt
 RO/suiZEOAta/WUX9vVLgYn2td00ef+AyjNUgffiUfvQfl++fiCDFTGl+MoCLjbh
 xQUPcRuRdED7bMKNrC0CcDOSwWEBWVXvkU/szBLDeE1sPjXzGQ80q1Y72k9y961I
 mqg7FrHqjZsxT9luXMAzClHNhXAtvehkJZBIdHlFok83EFoTQp48Da4jaDuOOhlq
 p/lkPJWOHegIQMWtGwRyGmG1qzil7b/QBNAPLgu9pF4TA+ySRBEB2BOr2jRSkj6N
 mNTHQbSYxBoktdt+VhtrSsxR+i8lwlegx+RNRFmKK3VH5da2nfiBaOY7zBQQHxCK
 yxQvXvsljSVpfkFKLc/S2nLQL1zTkRfFKV1Xmd3+3owR+EoqM60=
 =NpMX
 -----END PGP SIGNATURE-----

Merge tag 'asm-generic-mmu-context-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic mmu-context cleanup from Arnd Bergmann:
 "This is a cleanup series from Nicholas Piggin, preparing for later
  changes. The asm/mmu_context.h header are generalized and common code
  moved to asm-gneneric/mmu_context.h.

  This saves a bit of code and makes it easier to change in the future"

* tag 'asm-generic-mmu-context-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (25 commits)
  h8300: Fix generic mmu_context build
  m68k: mmu_context: Fix Sun-3 build
  xtensa: use asm-generic/mmu_context.h for no-op implementations
  x86: use asm-generic/mmu_context.h for no-op implementations
  um: use asm-generic/mmu_context.h for no-op implementations
  sparc: use asm-generic/mmu_context.h for no-op implementations
  sh: use asm-generic/mmu_context.h for no-op implementations
  s390: use asm-generic/mmu_context.h for no-op implementations
  riscv: use asm-generic/mmu_context.h for no-op implementations
  powerpc: use asm-generic/mmu_context.h for no-op implementations
  parisc: use asm-generic/mmu_context.h for no-op implementations
  openrisc: use asm-generic/mmu_context.h for no-op implementations
  nios2: use asm-generic/mmu_context.h for no-op implementations
  nds32: use asm-generic/mmu_context.h for no-op implementations
  mips: use asm-generic/mmu_context.h for no-op implementations
  microblaze: use asm-generic/mmu_context.h for no-op implementations
  m68k: use asm-generic/mmu_context.h for no-op implementations
  ia64: use asm-generic/mmu_context.h for no-op implementations
  hexagon: use asm-generic/mmu_context.h for no-op implementations
  csky: use asm-generic/mmu_context.h for no-op implementations
  ...
2020-12-15 23:58:04 -08:00
Linus Torvalds e2dc495734 asm-generic cleanups for v5.11
These are a couple of compiler warning fixes to make 'make W=2'
 less noisy, as well as some fixes to code comments in asm-generic.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEo6/YBQwIrVS28WGKmmx57+YAGNkFAl/Y10UACgkQmmx57+YA
 GNmJ8A/6A5iIFTJu48fEb4aVDXkW3WLsgRJ+pPt+sFqNhLJu6yi+HftNPhvfaXuJ
 1/S2uqAc2VA8WbHn+KTqPk5SsBh5urI6c4DXxTDHihMT6lIqjRbhKIoIaFx7Vl8d
 1CERQTqgJMmGNjrZkOnD3qsud9tbUh/dJZl3UuDYmYmgPw/p+y79mGIwAzvHYsU9
 QdazdV6v22ceagp2QSLYTr7LN6pShijyXqcJ4ko9Zhzpj1TNsBF97nKIww/vMm3k
 XRLBDbPfTcGrUtQmDQ+lVWPNpFbiR2iZuC/CBy4e0MbpQP5l9zoVG7d60Imvi/17
 9+vWmvng9ehFiyM5fRYG67L+cKVbPhVMW1TmUpxg88KvznudHKgV0jwXRZV2EO10
 /RpVQIJ0rLODx2myEZd8Rqhv2UVmjJmViPq7Hr/D8C+JcwdtfcPnziQteBOB0piz
 QI1h0me+0Yj90nLpjWBGCwUnFh+8/SAoKkwViCxA+Jmn6/34hh0/5w9ExoI+4Frr
 8KlHu5wZ6O0mqWT0INrbeb0nmktFOL9tGwTrHa8Z723osB1nuVtTAvHxWCOSlVDd
 XkuViDLkcJn4B+7EcUoR1YY9wCwK5eHcvA/h/44Y7xU5k4OEJP5hFhXy4ew2CCbE
 OpazsuCABkpno/WbLoJSdEA+2Dv/uiN5ChNjACgWBN2M4LlKBGs=
 =c2xf
 -----END PGP SIGNATURE-----

Merge tag 'asm-generic-cleanup-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic cleanups from Arnd Bergmann:
 "These are a couple of compiler warning fixes to make 'make W=2' less
  noisy, as well as some fixes to code comments in asm-generic"

* tag 'asm-generic-cleanup-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  syscalls: Fix file comments for syscalls implemented in kernel/sys.c
  ctype.h: remove duplicate isdigit() helper
  qspinlock: use signed temporaries for cmpxchg
  asm-generic: fix ffs -Wshadow warning
  asm-generic: percpu: avoid Wshadow warning
  asm-generic/sembuf: Update architecture related information in comment
2020-12-15 23:41:19 -08:00
Christophe Leroy 0a571b085f asm-generic: force inlining of get_order() to work around gcc10 poor decision
When building mpc885_ads_defconfig with gcc 10.1,
the function get_order() appears 50 times in vmlinux:

  [linux]# ppc-linux-objdump -x vmlinux | grep get_order | wc -l
  50

  [linux]# size vmlinux
     text	   data	    bss	    dec	    hex	filename
  3842620	 675624	 135160	4653404	 47015c	vmlinux

In the old days, marking a function 'static inline' was forcing GCC to
inline, but since commit ac7c3e4ff4 ("compiler: enable
CONFIG_OPTIMIZE_INLINING forcibly") GCC may decide to not inline a
function.

It looks like GCC 10 is taking poor decisions on this.

get_order() compiles into the following tiny function, occupying 20
bytes of text.

  0000007c <get_order>:
    7c:   38 63 ff ff     addi    r3,r3,-1
    80:   54 63 a3 3e     rlwinm  r3,r3,20,12,31
    84:   7c 63 00 34     cntlzw  r3,r3
    88:   20 63 00 20     subfic  r3,r3,32
    8c:   4e 80 00 20     blr

By forcing get_order() to be __always_inline, the size of text is
reduced by 1940 bytes, that is almost twice the space occupied by
50 times get_order()

  [linux-powerpc]# size vmlinux
     text	   data	    bss	    dec	    hex	filename
  3840680	 675588	 135176	4651444	 46f9b4	vmlinux

Link: https://lkml.kernel.org/r/96c6172d619c51acc5c1c4884b80785c59af4102.1602949927.git.christophe.leroy@csgroup.eu
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Cc: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15 22:46:15 -08:00
Linus Torvalds 2cffa11e2a Generic interrupt and irqchips subsystem:
Core:
 
      - Consolidation and robustness changes for irq time accounting
 
      - Cleanup and consolidation of irq stats
 
      - Remove the fasteoi IPI flow which has been proved useless
 
      - Provide an interface for converting legacy interrupt mechanism into
        irqdomains
 
  Drivers:
 
      The rare event of not having completely new chip driver code, just new
      DT bindings and extensions of existing drivers to accomodate new
      variants!
 
      - Preliminary support for managed interrupts on platform devices
 
      - Correctly identify allocation of MSIs proxyied by another device
 
      - Generalise the Ocelot support to new SoCs
 
      - Improve GICv4.1 vcpu entry, matching the corresponding KVM optimisation
 
      - Work around spurious interrupts on Qualcomm PDC
 
      - Random fixes and cleanups
 
 Thanks,
 
 	tglx
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl/YwZgTHHRnbHhAbGlu
 dXRyb25peC5kZQAKCRCmGPVMDXSYoW4CD/90rTi1OQrMe3nb5okVjUZmktz/K3BN
 Cl5+evFiXiNoH+yJSMIVP+8eMAtBH6RgoaD0EUtSYmgzb9h/JRRQYwtPxobXcMb2
 2xcWyLPJkVJL431JKNM8BBRYjLA2VnQ6Ia+Kx3BxqpgKXn5+cEMh1dwIy27Ll2rj
 +2NHAQe1sHL7o/KcCDhYqbVIDjw5K/d7YPwjEuPeEoNv1DOxrOCdCEfgFN0jBtRE
 CoaRTBskeAaHIzHNp47Mxyz43g4tA/D8kB68X0OjpEykVkPUbgNK1FHSwaPbIsFT
 FTSPU3zg8Q6DZ+RGyjNJykIFgUbirlJxARk2c6Ct8Kc3DN6K1jQt4EsU7CXRCc98
 BTBjUNeFeNj3irZ4GHhyMKOQJCA1Z5nCRfBUGiW6gK8183us3BLfH5DM1zEsAYUh
 DCp+UKsLuXhbB80EWq7kl82/2mNGZ8En8EerE6XJA7Z3JN8FplOHEuLezYYzwzbb
 RIes971Vc50J2u2Wf/M2c3PDz3D/4FzfwUeA4LJfTnmOL09RYZ8CsqSckpx4ku/F
 XiBnjwtGEpDXWJ8z13DC7yONrxFGByV19+sqHTBlub5DmIs0gXjhC0dKAPAruUIS
 iCC+Vx6xLgOpTDu8shFsjibbi9Hb6vuZrF2Te+WR5Rf7d80C0J4b5K5PS4daUjr6
 IuD2tz+3CtPjHw==
 =iytv
 -----END PGP SIGNATURE-----

Merge tag 'irq-core-2020-12-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq updates from Thomas Gleixner:
 "Generic interrupt and irqchips subsystem updates. Unusually, there is
  not a single completely new irq chip driver, just new DT bindings and
  extensions of existing drivers to accomodate new variants!

  Core:

   - Consolidation and robustness changes for irq time accounting

   - Cleanup and consolidation of irq stats

   - Remove the fasteoi IPI flow which has been proved useless

   - Provide an interface for converting legacy interrupt mechanism into
     irqdomains

  Drivers:

   - Preliminary support for managed interrupts on platform devices

   - Correctly identify allocation of MSIs proxyied by another device

   - Generalise the Ocelot support to new SoCs

   - Improve GICv4.1 vcpu entry, matching the corresponding KVM
     optimisation

   - Work around spurious interrupts on Qualcomm PDC

   - Random fixes and cleanups"

* tag 'irq-core-2020-12-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (54 commits)
  irqchip/qcom-pdc: Fix phantom irq when changing between rising/falling
  driver core: platform: Add devm_platform_get_irqs_affinity()
  ACPI: Drop acpi_dev_irqresource_disabled()
  resource: Add irqresource_disabled()
  genirq/affinity: Add irq_update_affinity_desc()
  irqchip/gic-v3-its: Flag device allocation as proxied if behind a PCI bridge
  irqchip/gic-v3-its: Tag ITS device as shared if allocating for a proxy device
  platform-msi: Track shared domain allocation
  irqchip/ti-sci-intr: Fix freeing of irqs
  irqchip/ti-sci-inta: Fix printing of inta id on probe success
  drivers/irqchip: Remove EZChip NPS interrupt controller
  Revert "genirq: Add fasteoi IPI flow"
  irqchip/hip04: Make IPIs use handle_percpu_devid_irq()
  irqchip/bcm2836: Make IPIs use handle_percpu_devid_irq()
  irqchip/armada-370-xp: Make IPIs use handle_percpu_devid_irq()
  irqchip/gic, gic-v3: Make SGIs use handle_percpu_devid_irq()
  irqchip/ocelot: Add support for Jaguar2 platforms
  irqchip/ocelot: Add support for Serval platforms
  irqchip/ocelot: Add support for Luton platforms
  irqchip/ocelot: prepare to support more SoC
  ...
2020-12-15 15:03:31 -08:00
Thomas Gleixner 3c41e57a1e irqchip updates for Linux 5.11
- Preliminary support for managed interrupts on platform devices
 - Correctly identify allocation of MSIs proxyied by another device
 - Remove the fasteoi IPI flow which has been proved useless
 - Generalise the Ocelot support to new SoCs
 - Improve GICv4.1 vcpu entry, matching the corresponding KVM optimisation
 - Work around spurious interrupts on Qualcomm PDC
 - Random fixes and cleanups
 -----BEGIN PGP SIGNATURE-----
 
 iQJDBAABCgAtFiEEn9UcU+C1Yxj9lZw9I9DQutE9ekMFAl/Uxq8PHG1hekBrZXJu
 ZWwub3JnAAoJECPQ0LrRPXpDoW0P/0ZMDvFPxrfnJD46exUgUOPuuFF8jZxAlxD8
 7UExqar7u6yX7bbq394jPgtOOxldDagfCx/jCXgb9ja7DK5EHKRcrfjaDT8knHi2
 Keg5RaRMRi9TVltvWQTxAkXwSv0Atl881qqsndPeZCez0GNZp+HB34s+rNkZwBOu
 MBrWihMQOSv5QE6milsNc7HXLSHM1eLZ7Y2XgumNtKrIGEX9yZI7qwdMofwP8Za3
 ayMOvc1WAWaTJI7Mg5ac1yTCVbqLmRHhCtws6c6DMgaRu6SI0itmbpQzkDuJJIe3
 k9h4KQPaKAFcQsoo3GV0MKTMm63eq82XT3CAdv+htYRY1z95D2+nzNK+mJtsGptX
 gJ2zeJkUb4u+yVtNguL9qjo5ssCXV/6IybJxv6baaEFnSwQMUwqa066NdxmtqfIe
 1BOWnc153a7SRbQ34M9/llje+v8YJbueGMS2RFR2LQ6IjjpaHsXh+YCZokfA/kdk
 zGbOUD5WWFtFD1T3UoaJ4gFt+pzHjNqym4CcEj4S1Vf5y+POUkNmC+GYK+xfm2Fp
 WJMbdIUxJhHFRD9L1ShtfAVUSbp712VOOdILp9rYAkOdqfb51BVUiMUP++s2dGp1
 ZIT78qt7kTKT1CxbDdFAjzsi7RoMqdSGYgKmG4sVprELeZnFwq47nBkBr8XEQ1TT
 0ccEUOY8
 =7Z24
 -----END PGP SIGNATURE-----

Merge tag 'irqchip-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/core

Pull irqchip updates for 5.11 from Marc Zyngier:

  - Preliminary support for managed interrupts on platform devices
  - Correctly identify allocation of MSIs proxyied by another device
  - Remove the fasteoi IPI flow which has been proved useless
  - Generalise the Ocelot support to new SoCs
  - Improve GICv4.1 vcpu entry, matching the corresponding KVM optimisation
  - Work around spurious interrupts on Qualcomm PDC
  - Random fixes and cleanups

Link: https://lore.kernel.org/r/20201212135626.1479884-1-maz@kernel.org
2020-12-15 10:48:07 +01:00
Linus Torvalds 148842c98a Yet another large set of x86 interrupt management updates:
- Simplification and distangling of the MSI related functionality
 
    - Let IO/APIC construct the RTE entries from an MSI message instead of
      having IO/APIC specific code in the interrupt remapping drivers
 
    - Make the retrieval of the parent interrupt domain (vector or remap
      unit) less hardcoded and use the relevant irqdomain callbacks for
      selection.
 
    - Allow the handling of more than 255 CPUs without a virtualized IOMMU
      when the hypervisor supports it. This has made been possible by the
      above modifications and also simplifies the existing workaround in the
      HyperV specific virtual IOMMU.
 
    - Cleanup of the historical timer_works() irq flags related
      inconsistencies.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl/Xxd8THHRnbHhAbGlu
 dXRyb25peC5kZQAKCRCmGPVMDXSYoYpOD/9C5TppNlPMUyx2SflH6bxt37pJEpln
 +hYTKsk+jSThntr5mfj+GifGvgmHOVBTGnlDUnUnrpN7TQmLFBzwTOtnBLW53AO2
 16/u0+Xci4LNCtEkaymf0Rq4MfsfriXHPJr0A/CnZ0tpHSf5QKHAiitSiGujdMlb
 gbq43+zXd+jNkH7vkOLPX/7dZVI1hNASQEevJu2tRR4xYTuXFdBxvLgYkHtYKKrK
 R1sbs6nI6yIzye2u4m4xGu29SxgUft+zdUf+UehJKM3yFmf51d9qpkX+kLaTWuaL
 VPsMItbn0kdvxwXQWO6DYnIAAnVKCklyHQJTZCoNq9Fe91OoByak1CEVspSOa1av
 JmycNSch4IYWasR4vVCB1gbb+V9SejcKu5SV3CDrEDqwkOIpfiqpriUXSCJTLlFd
 QOEDOLuuk/79Qs//J/tb/nJ4IuKv8WPudDfIlMro8wUsAr67DjD4mnXprZ+svwWx
 Ct/0/Memk+BSa0cw6pvg24BUZGN6zrufkBu2HKT9GOXRUdNkdLkiPhT8mK4T/O0l
 f90QCLjPSOJ/K/pLEWdUHEPmgC5Q9RsXOmwVGqX+RbjfP7mYTJXlmWnBb+cFNch0
 xFIH3SxVGylxxT06NX3SkvinrHj10CoAlmneefBlLtx6dF+2P84DAMZSF0OFToVI
 c2KMg5zoesI4bg==
 =8Gfs
 -----END PGP SIGNATURE-----

Merge tag 'x86-apic-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 apic updates from Thomas Gleixner:
 "Yet another large set of x86 interrupt management updates:

   - Simplification and distangling of the MSI related functionality

   - Let IO/APIC construct the RTE entries from an MSI message instead
     of having IO/APIC specific code in the interrupt remapping drivers

   - Make the retrieval of the parent interrupt domain (vector or remap
     unit) less hardcoded and use the relevant irqdomain callbacks for
     selection.

   - Allow the handling of more than 255 CPUs without a virtualized
     IOMMU when the hypervisor supports it. This has made been possible
     by the above modifications and also simplifies the existing
     workaround in the HyperV specific virtual IOMMU.

   - Cleanup of the historical timer_works() irq flags related
     inconsistencies"

* tag 'x86-apic-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (42 commits)
  x86/ioapic: Cleanup the timer_works() irqflags mess
  iommu/hyper-v: Remove I/O-APIC ID check from hyperv_irq_remapping_select()
  iommu/amd: Fix IOMMU interrupt generation in X2APIC mode
  iommu/amd: Don't register interrupt remapping irqdomain when IR is disabled
  iommu/amd: Fix union of bitfields in intcapxt support
  x86/ioapic: Correct the PCI/ISA trigger type selection
  x86/ioapic: Use I/O-APIC ID for finding irqdomain, not index
  x86/hyperv: Enable 15-bit APIC ID if the hypervisor supports it
  x86/kvm: Enable 15-bit extension when KVM_FEATURE_MSI_EXT_DEST_ID detected
  iommu/hyper-v: Disable IRQ pseudo-remapping if 15 bit APIC IDs are available
  x86/apic: Support 15 bits of APIC ID in MSI where available
  x86/ioapic: Handle Extended Destination ID field in RTE
  iommu/vt-d: Simplify intel_irq_remapping_select()
  x86: Kill all traces of irq_remapping_get_irq_domain()
  x86/ioapic: Use irq_find_matching_fwspec() to find remapping irqdomain
  x86/hpet: Use irq_find_matching_fwspec() to find remapping irqdomain
  iommu/hyper-v: Implement select() method on remapping irqdomain
  iommu/vt-d: Implement select() method on remapping irqdomain
  iommu/amd: Implement select() method on remapping irqdomain
  x86/apic: Add select() method on vector irqdomain
  ...
2020-12-14 18:59:53 -08:00
Linus Torvalds edd7ab7684 The new preemtible kmap_local() implementation:
- Consolidate all kmap_atomic() internals into a generic implementation
     which builds the base for the kmap_local() API and make the
     kmap_atomic() interface wrappers which handle the disabling/enabling of
     preemption and pagefaults.
 
   - Switch the storage from per-CPU to per task and provide scheduler
     support for clearing mapping when scheduling out and restoring them
     when scheduling back in.
 
   - Merge the migrate_disable/enable() code, which is also part of the
     scheduler pull request. This was required to make the kmap_local()
     interface available which does not disable preemption when a mapping
     is established. It has to disable migration instead to guarantee that
     the virtual address of the mapped slot is the same accross preemption.
 
   - Provide better debug facilities: guard pages and enforced utilization
     of the mapping mechanics on 64bit systems when the architecture allows
     it.
 
   - Provide the new kmap_local() API which can now be used to cleanup the
     kmap_atomic() usage sites all over the place. Most of the usage sites
     do not require the implicit disabling of preemption and pagefaults so
     the penalty on 64bit and 32bit non-highmem systems is removed and quite
     some of the code can be simplified. A wholesale conversion is not
     possible because some usage depends on the implicit side effects and
     some need to be cleaned up because they work around these side effects.
 
     The migrate disable side effect is only effective on highmem systems
     and when enforced debugging is enabled. On 64bit and 32bit non-highmem
     systems the overhead is completely avoided.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl/XyQwTHHRnbHhAbGlu
 dXRyb25peC5kZQAKCRCmGPVMDXSYoUolD/9+R+BX96fGir+I8rG9dc3cbLw5meSi
 0I/Nq3PToZMs2Iqv50DsoaPYHHz/M6fcAO9LRIgsE9jRbnY93GnsBM0wU9Y8yQaT
 4wUzOG5WHaLDfqIkx/CN9coUl458oEiwOEbn79A2FmPXFzr7IpkufnV3ybGDwzwP
 p73bjMJMPPFrsa9ig87YiYfV/5IAZHi82PN8Cq1v4yNzgXRP3Tg6QoAuCO84ZnWF
 RYlrfKjcJ2xPdn+RuYyXolPtxr1hJQ0bOUpe4xu/UfeZjxZ7i1wtwLN9kWZe8CKH
 +x4Lz8HZZ5QMTQ9sCHOLtKzu2MceMcpISzoQH4/aFQCNMgLn1zLbS790XkYiQCuR
 ne9Cua+IqgYfGMG8cq8+bkU9HCNKaXqIBgPEKE/iHYVmqzCOqhW5Cogu4KFekf6V
 Wi7pyyUdX2en8BAWpk5NHc8de9cGcc+HXMq2NIcgXjVWvPaqRP6DeITERTZLJOmz
 XPxq5oPLGl7wdm7z+ICIaNApy8zuxpzb6sPLNcn7l5OeorViORlUu08AN8587wAj
 FiVjp6ZYomg+gyMkiNkDqFOGDH5TMENpOFoB0hNNEyJwwS0xh6CgWuwZcv+N8aPO
 HuS/P+tNANbD8ggT4UparXYce7YCtgOf3IG4GA3JJYvYmJ6pU+AZOWRoDScWq4o+
 +jlfoJhMbtx5Gg==
 =n71I
 -----END PGP SIGNATURE-----

Merge tag 'core-mm-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull kmap updates from Thomas Gleixner:
 "The new preemtible kmap_local() implementation:

   - Consolidate all kmap_atomic() internals into a generic
     implementation which builds the base for the kmap_local() API and
     make the kmap_atomic() interface wrappers which handle the
     disabling/enabling of preemption and pagefaults.

   - Switch the storage from per-CPU to per task and provide scheduler
     support for clearing mapping when scheduling out and restoring them
     when scheduling back in.

   - Merge the migrate_disable/enable() code, which is also part of the
     scheduler pull request. This was required to make the kmap_local()
     interface available which does not disable preemption when a
     mapping is established. It has to disable migration instead to
     guarantee that the virtual address of the mapped slot is the same
     across preemption.

   - Provide better debug facilities: guard pages and enforced
     utilization of the mapping mechanics on 64bit systems when the
     architecture allows it.

   - Provide the new kmap_local() API which can now be used to cleanup
     the kmap_atomic() usage sites all over the place. Most of the usage
     sites do not require the implicit disabling of preemption and
     pagefaults so the penalty on 64bit and 32bit non-highmem systems is
     removed and quite some of the code can be simplified. A wholesale
     conversion is not possible because some usage depends on the
     implicit side effects and some need to be cleaned up because they
     work around these side effects.

     The migrate disable side effect is only effective on highmem
     systems and when enforced debugging is enabled. On 64bit and 32bit
     non-highmem systems the overhead is completely avoided"

* tag 'core-mm-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
  ARM: highmem: Fix cache_is_vivt() reference
  x86/crashdump/32: Simplify copy_oldmem_page()
  io-mapping: Provide iomap_local variant
  mm/highmem: Provide kmap_local*
  sched: highmem: Store local kmaps in task struct
  x86: Support kmap_local() forced debugging
  mm/highmem: Provide CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP
  mm/highmem: Provide and use CONFIG_DEBUG_KMAP_LOCAL
  microblaze/mm/highmem: Add dropped #ifdef back
  xtensa/mm/highmem: Make generic kmap_atomic() work correctly
  mm/highmem: Take kmap_high_get() properly into account
  highmem: High implementation details and document API
  Documentation/io-mapping: Remove outdated blurb
  io-mapping: Cleanup atomic iomap
  mm/highmem: Remove the old kmap_atomic cruft
  highmem: Get rid of kmap_types.h
  xtensa/mm/highmem: Switch to generic kmap atomic
  sparc/mm/highmem: Switch to generic kmap atomic
  powerpc/mm/highmem: Switch to generic kmap atomic
  nds32/mm/highmem: Switch to generic kmap atomic
  ...
2020-12-14 18:35:53 -08:00
Linus Torvalds 76d4acf22b perf/kprobes updates:
- Make kretprobes lockless to avoid the rp->lock performance and potential
    lock ordering issues.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl/XvuYTHHRnbHhAbGlu
 dXRyb25peC5kZQAKCRCmGPVMDXSYoV3XEADA3yp4ApabrdSMK+JpTM053mM3NCCk
 VLZEdh5+ydvPfgTWZcgLDfL4P4MVySDKf40pSVgZOA73uDWhdO4jcMoJgl9Du4Nq
 qfvz6Atj0a8XEgAFNh1IWGGAHydIwKOQZJyjFT5Kh94QNOErF2PJGAMnoMYpdJsj
 E7kgDM+vmWJk0GE+OYTzsAYQ99XhLfUAO9f8WoRirxyNgga6bu0arRYWZSX3Sg/h
 oDUHeizyrrURUBgxJBewCxvCsy4TTfefwZFUBLK5gm3zRJLKDT2O8wiy+KzlRQqA
 kYV3fSx8fYETlSOJWJC8S01MLpxslGdenIdRgNc63C021DtwMGM83FCl0DLnPMeg
 iX5u+0Qg77rnJ8zh0cgSxyP6EgZzrUW8+DjZagge3PAnTXwYRv95pOJahJifDVmF
 mo2RJ2Me+XbqeB4BYoLivvWpXdsWOvtXl3BTA6ZLV+K823lMPYcZO/cXHIUYHhtu
 ExrZ+aw3opt43KT5sNQmPll7d1UsMD4/761L7gysIYK0RthunmlWpAnnfLTbRdPe
 ELKIHcuSCGkGfRs07/oPbbOpMorhel+3alW0B6Vzar0/0nw3fPX/yPIkCh7s941o
 G0UIPquvBGk3u0bZKZZ7QJPjT0ktdQpQs69+J2ARXWvApAGKnkOlPsNSI9TbPE3D
 ZIguKqSyzqJwuA==
 =PDBa
 -----END PGP SIGNATURE-----

Merge tag 'perf-kprobes-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf/kprobes updates from Thomas Gleixner:
 "Make kretprobes lockless to avoid the rp->lock performance and
  potential lock ordering issues"

* tag 'perf-kprobes-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/atomics: Regenerate the atomics-check SHA1's
  kprobes: Replace rp->free_instance with freelist
  freelist: Implement lockless freelist
  asm-generic/atomic: Add try_cmpxchg() fallbacks
  kprobes: Remove kretprobe hash
  llist: Add nonatomic __llist_add() and __llist_dell_all()
2020-12-14 17:41:38 -08:00
Linus Torvalds 1ac0884d54 A set of updates for entry/exit handling:
- More generalization of entry/exit functionality
 
  - The consolidation work to reclaim TIF flags on x86 and also for non-x86
    specific TIF flags which are solely relevant for syscall related work
    and have been moved into their own storage space. The x86 specific part
    had to be merged in to avoid a major conflict.
 
  - The TIF_NOTIFY_SIGNAL work which replaces the inefficient signal
    delivery mode of task work and results in an impressive performance
    improvement for io_uring. The non-x86 consolidation of this is going to
    come seperate via Jens.
 
  - The selective syscall redirection facility which provides a clean and
    efficient way to support the non-Linux syscalls of WINE by catching them
    at syscall entry and redirecting them to the user space emulation. This
    can be utilized for other purposes as well and has been designed
    carefully to avoid overhead for the regular fastpath. This includes the
    core changes and the x86 support code.
 
  - Simplification of the context tracking entry/exit handling for the users
    of the generic entry code which guarantee the proper ordering and
    protection.
 
  - Preparatory changes to make the generic entry code accomodate S390
    specific requirements which are mostly related to their syscall restart
    mechanism.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl/XoPoTHHRnbHhAbGlu
 dXRyb25peC5kZQAKCRCmGPVMDXSYoe0tD/4jSKHIogVM9kVpiYfwjDGS1NluaBXn
 71ZoASbX9GZebyGandMyF2QP1iJ24ZO0RztBwHEVH6fyomKB2iFNedssCpO9yfWV
 3eFRpOvMpbszY2W2bd0QG3GrqaTttjVfB4ahkGLzqeSbchdob6hZpNDYtBZnujA6
 GSnrrurfJkCGoQny+yJQYdQJXQU+BIX90B2a2Q+jW123Luy/iHXC1f/krZSA1m14
 fC9xYLSUjPphTzh2ZOW+C3DgdjOL5PfAm/6F+DArt4GtLgrEGD7R74aLSFhvetky
 dn5QtG+yAsz1i0cc5Wu/JBcT9tOkY92rPYSyLI9bYQUSQ/bMyuprz6oYKj3dubsu
 ZSsKPdkNFPIniL4fLdCMWZcIXX5xgnrxKjdgXZXW3gtrcxSns8w8uED3Sh7dgE08
 pgIeq67E5g/OB8kJXH1VxdewmeQb9cOmnzzHwNO7TrrGbBKjDTYHNdYOKf1dUTTK
 ZX1UjLfGwxTkMYAbQD1k0JGZ2OLRshzSaH5BW/ZKa3bvJW6yYOq+/YT8B8hbJ8U3
 vThlO75/55IJxS5r5Y3vZd/IHdsYbPuETD+TA8tNYtPqNZasW8nnk4TYctWqzDuO
 /Ka1wvWYid3c6ySznQn4zSyRjr968AfHeZ9YTUMhWufy5waXVmdBMG41u3IKfsVt
 osyzNc4EK19/Mg==
 =hsjV
 -----END PGP SIGNATURE-----

Merge tag 'core-entry-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull core entry/exit updates from Thomas Gleixner:
 "A set of updates for entry/exit handling:

   - More generalization of entry/exit functionality

   - The consolidation work to reclaim TIF flags on x86 and also for
     non-x86 specific TIF flags which are solely relevant for syscall
     related work and have been moved into their own storage space. The
     x86 specific part had to be merged in to avoid a major conflict.

   - The TIF_NOTIFY_SIGNAL work which replaces the inefficient signal
     delivery mode of task work and results in an impressive performance
     improvement for io_uring. The non-x86 consolidation of this is
     going to come seperate via Jens.

   - The selective syscall redirection facility which provides a clean
     and efficient way to support the non-Linux syscalls of WINE by
     catching them at syscall entry and redirecting them to the user
     space emulation. This can be utilized for other purposes as well
     and has been designed carefully to avoid overhead for the regular
     fastpath. This includes the core changes and the x86 support code.

   - Simplification of the context tracking entry/exit handling for the
     users of the generic entry code which guarantee the proper ordering
     and protection.

   - Preparatory changes to make the generic entry code accomodate S390
     specific requirements which are mostly related to their syscall
     restart mechanism"

* tag 'core-entry-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
  entry: Add syscall_exit_to_user_mode_work()
  entry: Add exit_to_user_mode() wrapper
  entry_Add_enter_from_user_mode_wrapper
  entry: Rename exit_to_user_mode()
  entry: Rename enter_from_user_mode()
  docs: Document Syscall User Dispatch
  selftests: Add benchmark for syscall user dispatch
  selftests: Add kselftest for syscall user dispatch
  entry: Support Syscall User Dispatch on common syscall entry
  kernel: Implement selective syscall userspace redirection
  signal: Expose SYS_USER_DISPATCH si_code type
  x86: vdso: Expose sigreturn address on vdso to the kernel
  MAINTAINERS: Add entry for common entry code
  entry: Fix boot for !CONFIG_GENERIC_ENTRY
  x86: Support HAVE_CONTEXT_TRACKING_OFFSTACK
  context_tracking: Only define schedule_user() on !HAVE_CONTEXT_TRACKING_OFFSTACK archs
  sched: Detect call to schedule from critical entry code
  context_tracking: Don't implement exception_enter/exit() on CONFIG_HAVE_CONTEXT_TRACKING_OFFSTACK
  context_tracking: Introduce HAVE_CONTEXT_TRACKING_OFFSTACK
  x86: Reclaim unused x86 TI flags
  ...
2020-12-14 17:13:53 -08:00
Palmer Dabbelt 7d95a88f92
Add and use a generic version of devmem_is_allowed()
As part of adding STRICT_DEVMEM support to the RISC-V port, Zong provided an
implementation of devmem_is_allowed() that's exactly the same as the version in
a handful of other ports.  Rather than duplicate code, I've put a generic
version of this in lib/ and used it for the RISC-V port.

* palmer/generic-devmem:
  arm64: Use the generic devmem_is_allowed()
  arm: Use the generic devmem_is_allowed()
  RISC-V: Use the new generic devmem_is_allowed()
  lib: Add a generic version of devmem_is_allowed()
2020-12-11 12:30:26 -08:00
Palmer Dabbelt 527701eda5
lib: Add a generic version of devmem_is_allowed()
As part of adding support for STRICT_DEVMEM to the RISC-V port, Zong
provided a devmem_is_allowed() implementation that's exactly the same as
all the others I checked.  Instead I'm adding a generic version, which
will soon be used.

Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-12-11 12:28:08 -08:00
Marc Zyngier 91f90daa4f platform-msi: Track shared domain allocation
We have two flavours of platform-MSI:

- MSIs generated by devices for themselves (the usual case)

- MSIs generated on behalf of other devices, as the generating
  device is some form of bridge (either a wire-to-MSI bridge,
  or even a non-transparent PCI bridge that repaints the PCI
  requester ID).

In the latter case, the underlying interrupt architecture may need
to track this in order to keep the mapping alive even when no MSI
are currently being generated.

Add a set of flags to the generic msi_alloc_info_t structure, as
well as the MSI_ALLOC_FLAGS_PROXY_DEVICE flag that will get
advertized by the platform-MSI code when allocating an irqdomain
for a device.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/20201129135208.680293-2-maz@kernel.org
2020-12-11 14:47:50 +00:00
Thomas Gleixner 6e799cb69a mm/highmem: Provide and use CONFIG_DEBUG_KMAP_LOCAL
CONFIG_KMAP_LOCAL can be enabled by x86/32bit even if CONFIG_HIGHMEM is not
enabled for temporary MMIO space mappings.

Provide it as a seperate config option which depends on CONFIG_KMAP_LOCAL
and let CONFIG_DEBUG_HIGHMEM select it.

This won't increase the debug coverage of this significantly but it paves
the way to do so.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20201118204006.869487226@linutronix.de
2020-11-24 14:42:08 +01:00
Thomas Gleixner e091bc90cd irqstat: Move declaration into asm-generic/hardirq.h
Move the declaration of the irq_cpustat per cpu variable to
asm-generic/hardirq.h and remove the now empty linux/irq_cpustat.h header.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20201113141733.737377332@linutronix.de
2020-11-23 10:31:06 +01:00
Thomas Gleixner 1adb99eabc asm-generic/irqstat: Add optional __nmi_count member
Add an optional __nmi_count member to irq_cpustat_t so more architectures
can use the generic version.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20201113141733.501611990@linutronix.de
2020-11-23 10:31:06 +01:00
Gabriel Krisman Bertazi 785dc4eb7f audit: Migrate to use SYSCALL_WORK flag
On architectures using the generic syscall entry code the architecture
independent syscall work is moved to flags in thread_info::syscall_work.
This removes architecture dependencies and frees up TIF bits.

Define SYSCALL_WORK_SYSCALL_AUDIT, use it in the generic entry code and
convert the code which uses the TIF specific helper functions to use the
new *_syscall_work() helpers which either resolve to the new mode for users
of the generic entry code or to the TIF based functions for the other
architectures.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20201116174206.2639648-9-krisman@collabora.com
2020-11-16 21:53:16 +01:00
Gabriel Krisman Bertazi 64c19ba29b ptrace: Migrate to use SYSCALL_TRACE flag
On architectures using the generic syscall entry code the architecture
independent syscall work is moved to flags in thread_info::syscall_work.
This removes architecture dependencies and frees up TIF bits.

Define SYSCALL_WORK_SYSCALL_TRACE, use it in the generic entry code and
convert the code which uses the TIF specific helper functions to use the
new *_syscall_work() helpers which either resolve to the new mode for users
of the generic entry code or to the TIF based functions for the other
architectures.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20201116174206.2639648-7-krisman@collabora.com
2020-11-16 21:53:16 +01:00
Gabriel Krisman Bertazi 23d67a5485 seccomp: Migrate to use SYSCALL_WORK flag
On architectures using the generic syscall entry code the architecture
independent syscall work is moved to flags in thread_info::syscall_work.
This removes architecture dependencies and frees up TIF bits.

Define SYSCALL_WORK_SECCOMP, use it in the generic entry code and convert
the code which uses the TIF specific helper functions to use the new
*_syscall_work() helpers which either resolve to the new mode for users of
the generic entry code or to the TIF based functions for the other
architectures.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20201116174206.2639648-5-krisman@collabora.com
2020-11-16 21:53:15 +01:00
Linus Torvalds a50cf15906 Merge branch 'for-5.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu
Pull percpu fix and cleanup from Dennis Zhou:
 "A fix for a Wshadow warning in the asm-generic percpu macros came in
  and then I tacked on the removal of flexible array initializers in the
  percpu allocator"

* 'for-5.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
  percpu: convert flexible array initializers to use struct_size()
  asm-generic: percpu: avoid Wshadow warning
2020-11-15 08:57:19 -08:00
Arvind Sankar 3347acc6fc compiler.h: fix barrier_data() on clang
Commit 815f0ddb34 ("include/linux/compiler*.h: make compiler-*.h
mutually exclusive") neglected to copy barrier_data() from
compiler-gcc.h into compiler-clang.h.

The definition in compiler-gcc.h was really to work around clang's more
aggressive optimization, so this broke barrier_data() on clang, and
consequently memzero_explicit() as well.

For example, this results in at least the memzero_explicit() call in
lib/crypto/sha256.c:sha256_transform() being optimized away by clang.

Fix this by moving the definition of barrier_data() into compiler.h.

Also move the gcc/clang definition of barrier() into compiler.h,
__memory_barrier() is icc-specific (and barrier() is already defined
using it in compiler-intel.h) and doesn't belong in compiler.h.

[rdunlap@infradead.org: fix ALPHA builds when SMP is not enabled]

Link: https://lkml.kernel.org/r/20201101231835.4589-1-rdunlap@infradead.org
Fixes: 815f0ddb34 ("include/linux/compiler*.h: make compiler-*.h mutually exclusive")
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20201014212631.207844-1-nivedita@alum.mit.edu
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-11-14 11:26:03 -08:00
Ingo Molnar a70a04b384 locking/atomics: Regenerate the atomics-check SHA1's
The include/asm-generic/atomic-instrumented.h checksum got out
of sync, so regenerate it. (No change to actual code.)

Also make scripts/atomic/gen-atomics.sh executable, to make
it easier to use.

The auto-generated atomic header signatures are now fine:

  thule:~/tip> scripts/atomic/check-atomics.sh
  thule:~/tip>

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-11-07 13:20:41 +01:00
Ingo Molnar 666fab4a3e Merge branch 'linus' into perf/kprobes
Conflicts:
	include/asm-generic/atomic-instrumented.h
	kernel/kprobes.c

Use the upstream atomic-instrumented.h checksum, and pick
the kprobes version of kernel/kprobes.c, which effectively
reverts this upstream workaround:

  645f224e7ba2: ("kprobes: Tell lockdep about kprobe nesting")

Since the new code *should* be fine without nesting.

Knock on wood ...

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-11-07 13:20:17 +01:00
Thomas Gleixner d7029e4549 highmem: Get rid of kmap_types.h
The header is not longer used and on alpha, ia64, openrisc, parisc and um
it was completely unused anyway as these architectures have no highmem
support.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20201103095858.422094352@linutronix.de
2020-11-06 23:14:58 +01:00
Thomas Gleixner 4f8b96cd47 asm-generic: Provide kmap_size.h
kmap_types.h is a misnomer because the old atomic MAP based array does not
exist anymore and the whole indirection of architectures including
kmap_types.h is inconinstent and does not allow to provide guard page
debugging for this misfeature.

Add a common header file which defines the mapping stack size for all
architectures. Will be used when converting architectures over to a
generic kmap_local/atomic implementation.

The array size is chosen with the following constraints in mind:

    - The deepest nest level in one context is 3 according to code
      inspection.

    - The worst case nesting for the upcoming reemptible version would be:

      2 maps in task context and a fault inside
      2 maps in the fault handler
      3 maps in softirq
      2 maps in interrupt

So a total of 16 is sufficient and probably overestimated.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: https://lore.kernel.org/r/20201103095857.078043987@linutronix.de
2020-11-06 23:14:54 +01:00
Linus Torvalds 11ad2a73de asm-generic: fixes for v5.10
There is one small bugfix, fixing a build regression for RISC-V
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEo6/YBQwIrVS28WGKmmx57+YAGNkFAl+cNsoACgkQmmx57+YA
 GNnVXQ//WuMPr7/bUDtSKzDNZKqV7dig7Cjv0bIr3A+LA3ximoJRvMNAe3XJDj0Y
 /OmIOf3I0fGwWhm2omujC4DfYzzimGq/aOq2RlOrqvnr06y4HtWiblnFZQjf0i9T
 v0j1jQLR4gZFazbr7p9n0Ib2sLK96d+2Yhb8m1pxrN1vG26D3Yrd4hHZCUi8CT+H
 b++i1X+FkXLdtjiR5yvIXCFbAU5ykvKBf/Hw4qr+5IZuxl2L1Lv3tXaTI77MiA1Y
 jJSc/l+kFc8RMYaOoK2GRuuIxiAwJwxLyPOeS6yBcHxlJ0bqQjbcpNTRok073fFf
 Ilnb4mL4qlWlf+w3EGd8cZ+kL/pY+48B8c0EyZ3h/P0FyDEMstWlxDZ4H/yfNtxC
 d/uCHh8wNAHPwAtLgeC26jE9XY6YYxYIQ96tcxaM6Okdwpp0O/7j9jH6u1Ph/bTJ
 Xio0olowJWmeC8LihJJ9tzAv8E/Yp3GdufWjm4Ruvcdg0pGnP0Wx+u1sJUWmb0Kh
 ho2M1pI/jx/Gmn2BZ02d9timAj4Z/zM84JcFbsucvkzlqic8eMi44a/LH4MlK7H4
 yofX1MRTlxJTaXCwoTkFiO08iJlOa4SwHdkByfxdyEX66SJELhVz04tR5Jz19V5u
 ++ATlVq89jVxpLdHCUAjf7LOHwfXzFyiLyCN3no+/SEUJoz1pTA=
 =vygx
 -----END PGP SIGNATURE-----

Merge tag 'asm-generic-fixes-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic fix from Arnd Bergmann:
 "One small bugfix, fixing a build regression for RISC-V"

* tag 'asm-generic-fixes-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic: mark __{get,put}_user_fn as __always_inline
2020-10-30 13:11:46 -07:00
Thomas Gleixner 8073c1ac82 genirq/msi: Allow shadow declarations of msi_msg:: $member
Architectures like x86 have their MSI messages in various bits of the data,
address_lo and address_hi field. Composing or decomposing these messages
with bitmasks and shifts is possible, but unreadable gunk.

Allow architectures to provide an architecture specific representation for
each member of msi_msg. Provide empty defaults for each and stick them into
an union.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20201024213535.443185-12-dwmw2@infradead.org
2020-10-28 20:26:25 +01:00
Kees Cook 3e6631485f vmlinux.lds.h: Keep .ctors.* with .ctors
Under some circumstances, the compiler generates .ctors.* sections. This
is seen doing a cross compile of x86_64 from a powerpc64el host:

x86_64-linux-gnu-ld: warning: orphan section `.ctors.65435' from `kernel/trace/trace_clock.o' being
placed in section `.ctors.65435'
x86_64-linux-gnu-ld: warning: orphan section `.ctors.65435' from `kernel/trace/ftrace.o' being
placed in section `.ctors.65435'
x86_64-linux-gnu-ld: warning: orphan section `.ctors.65435' from `kernel/trace/ring_buffer.o' being
placed in section `.ctors.65435'

Include these orphans along with the regular .ctors section.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Tested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: 83109d5d5f ("x86/build: Warn on orphan section placement")
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20201005025720.2599682-1-keescook@chromium.org
2020-10-27 11:13:41 -07:00
Christoph Hellwig 0bcd0a2be8 asm-generic: mark __{get,put}_user_fn as __always_inline
Without the explicit __always_inline, some RISC-V configs place the
functions out of line, triggering the BUILD_BUG_ON checks in the
function.

Fixes: 11129e8ed4 ("riscv: use memcpy based uaccess for nommu again")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2020-10-27 16:13:09 +01:00
Arnd Bergmann 29813a2297 asm-generic: percpu: avoid Wshadow warning
Nesting macros that use the same local variable names causes
warnings when building with "make W=2":

include/asm-generic/percpu.h:117:14: warning: declaration of '__ret' shadows a previous local [-Wshadow]
include/asm-generic/percpu.h:126:14: warning: declaration of '__ret' shadows a previous local [-Wshadow]

These are fairly harmless, but since the warning comes from
a global header, the warning happens every time the headers
are included, which is fairly annoying.

Rename the variables to avoid shadowing and shut up the warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
2020-10-26 23:54:48 +00:00
Arnd Bergmann f44ca0871b qspinlock: use signed temporaries for cmpxchg
When building with W=2, the build log is flooded with

include/asm-generic/qrwlock.h:65:56: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg_acquire' differ in signedness [-Wpointer-sign]
include/asm-generic/qrwlock.h:92:53: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg_acquire' differ in signedness [-Wpointer-sign]
include/asm-generic/qspinlock.h:68:55: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg_acquire' differ in signedness [-Wpointer-sign]
include/asm-generic/qspinlock.h:82:52: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg_acquire' differ in signedness [-Wpointer-sign]

The atomics are built on top of signed integers, but the caller
doesn't actually care. Just use signed types as well.

Fixes: 27df89689e ("locking/spinlocks: Remove an instruction from spin and write locks")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2020-10-26 20:19:48 +01:00
Arnd Bergmann 6f6573a404 asm-generic: fix ffs -Wshadow warning
gcc -Wshadow warns about the ffs() definition that has the
same name as the global ffs() built-in:

include/asm-generic/bitops/builtin-ffs.h:13:28: warning: declaration of 'ffs' shadows a built-in function [-Wshadow]

This is annoying because 'make W=2' warns every time this
header gets included.

Change it to use a #define instead, making callers directly
reference the builtin.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2020-10-26 17:00:29 +01:00
Arnd Bergmann 80b4707a2f asm-generic: percpu: avoid Wshadow warning
Nesting macros that use the same local variable names causes
warnings when building with "make W=2":

include/asm-generic/percpu.h:117:14: warning: declaration of '__ret' shadows a previous local [-Wshadow]
include/asm-generic/percpu.h:126:14: warning: declaration of '__ret' shadows a previous local [-Wshadow]

These are fairly harmless, but since the warning comes from
a global header, the warning happens every time the headers
are included, which is fairly annoying.

Rename the variables to avoid shadowing and shut up the warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2020-10-26 16:49:12 +01:00
Nicholas Piggin 94f89922e1 asm-generic: add generic MMU versions of mmu context functions
Many of these are no-ops on many architectures, so extend mmu_context.h
to cover MMU and NOMMU, and split the NOMMU bits out to nommu_context.h

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: linux-arch@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2020-10-26 16:45:03 +01:00
Joe Perches 33def8498f treewide: Convert macro and uses of __section(foo) to __section("foo")
Use a more generic form for __section that requires quotes to avoid
complications with clang and gcc differences.

Remove the quote operator # from compiler_attributes.h __section macro.

Convert all unquoted __section(foo) uses to quoted __section("foo").
Also convert __attribute__((section("foo"))) uses to __section("foo")
even if the __attribute__ has multiple list entry forms.

Conversion done using the script at:

    https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.pl

Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@gooogle.com>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-25 14:51:49 -07:00
Linus Torvalds 0593c1b459 RISC-V Patches for the 5.10 Merge Window, Part 2
This actually just contains a single patch set:
 
 * The remainder of Christoph's work to remove set_fs, including the RISC-V
   portion.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEKzw3R0RoQ7JKlDp6LhMZ81+7GIkFAl+TtGcTHHBhbG1lckBk
 YWJiZWx0LmNvbQAKCRAuExnzX7sYiS1rD/97L4HvdLpNOOcbk3ecGEe0l1VMx9JE
 twhJyifurCf7w70WwgOjNL5sl1OnoDjUjFni0GyrN5+FycocAHd9o1+fqvaEwRaZ
 BFusgHkzuRhf+hSCwYov1spPuJbp4bKH6yat169uLrskjEZkhk0Dc2lVMHXb3Sn4
 4AzmSz6i58KkX1BLnSAlo6JPbFm2NaEswxWrcifcbjJ1lsvPYOgjR3SH5StXxO2a
 sggsOtUeKsHkHwTsxeSGzcqxwEuxsjNN75BPT11E1Ip9XS2qv6XzalVVWiXIdcff
 beJ8y5RuBb7OkbgFcmTXyr/RNoOIPq1xiIGzWu5ITi9PX7TTIdUFHGFaGE8LIRSY
 PuNOnP3pz+0r/bBscXFSba6zPLeACNYraJxtcc6sfLlkUmHDwQDTu1ChHYNW6H7N
 JHPcMy8wdootYO2nwdNDCCOE0Tes5OkeW+5pw7qhSv+6ZkY+9i2jKVkhx19oq81X
 Be9rrADNt3y9jGlu3xjvL5naN6OlTWWFh9r6M9LSDpvqIHrraaabJqkzM1LPLzu+
 +NJ8lKBbbyzIwXyg/+yVecO58UWqMzbOdvdnZHrd2wUTEHotKuF8L8RV/QKrAtK1
 5K9s00eKnTge1Lhm1NcaseI8yZrgpcOr9zFJW1IEoxPzpy+leM1VuMKG43MxMKR2
 Ed0ldco9ht64Jg==
 =EaJX
 -----END PGP SIGNATURE-----

Merge tag 'riscv-for-linus-5.10-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull more RISC-V updates from Palmer Dabbelt:
 "Just a single patch set: the remainder of Christoph's work to remove
  set_fs, including the RISC-V portion"

* tag 'riscv-for-linus-5.10-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: remove address space overrides using set_fs()
  riscv: implement __get_kernel_nofault and __put_user_nofault
  riscv: refactor __get_user and __put_user
  riscv: use memcpy based uaccess for nommu again
  asm-generic: make the set_fs implementation optional
  asm-generic: add nommu implementations of __{get,put}_kernel_nofault
  asm-generic: improve the nommu {get,put}_user handling
  uaccess: provide a generic TASK_SIZE_MAX definition
2020-10-24 10:57:57 -07:00
Linus Torvalds 746b25b1aa Kbuild updates for v5.10
- Support 'make compile_commands.json' to generate the compilation
    database more easily, avoiding stale entries
 
  - Support 'make clang-analyzer' and 'make clang-tidy' for static checks
    using clang-tidy
 
  - Preprocess scripts/modules.lds.S to allow CONFIG options in the module
    linker script
 
  - Drop cc-option tests from compiler flags supported by our minimal
    GCC/Clang versions
 
  - Use always 12-digits commit hash for CONFIG_LOCALVERSION_AUTO=y
 
  - Use sha1 build id for both BFD linker and LLD
 
  - Improve deb-pkg for reproducible builds and rootless builds
 
  - Remove stale, useless scripts/namespace.pl
 
  - Turn -Wreturn-type warning into error
 
  - Fix build error of deb-pkg when CONFIG_MODULES=n
 
  - Replace 'hostname' command with more portable 'uname -n'
 
  - Various Makefile cleanups
 -----BEGIN PGP SIGNATURE-----
 
 iQJJBAABCgAzFiEEbmPs18K1szRHjPqEPYsBB53g2wYFAl+RfS0VHG1hc2FoaXJv
 eUBrZXJuZWwub3JnAAoJED2LAQed4NsGG1QP/2hzoMzK1YXErPUhGrhYU1rxz7Nu
 HkLTIkyKF1HPwSJf5XyNW/FTBI4SDlkNoVg/weEDCS1yFxxpvQLIck8ChzA1kIIM
 P+1IfBWOTzqn91XsapU2zwSno3gylphVchVIvYAB3oLUotGeMSluy1cQtBRzyA5D
 rj2Q7H8fzkzk3YoBcBC/BOKDlfo/usqQ1X/gsfRFwN/BJxeZSYoujNBE7KtHaDsd
 8K/ggBIqmST4NBn+M8c11d8CxzvWbtG1gq3EkUL5nG8T13DsGn1EFC0SPt85bkvv
 f9YywfJi37HixhZzK6tXYjN/PWoiEY6z90mhd0NtZghQT7kQMiTQ3sWrM8dX3ssf
 phBzO94uFQDjhyxOaSSsCoI/TIciAPo4+G8PNjcaEtj63IEfhEz/dnlstYwY5Y9P
 Pp3aZtVjSGJwGW2u2EUYj6paFVqjf6DXQjQKPNHnsYCEidIvFTjjguRGvx9gl6mx
 yd8oseOsAtOEf0alRe9MMdvN17O3UrRAxgBdap7fktg02TLVRGxZIbuwKmBf29ho
 ORl9zeFkYBn6XQFyuItJoXy/kYFyHDaBEPYCRQcY4dwqcjZIiAc/FhYbqYthJ59L
 5vLN2etmDIVSuUv1J5nBqHHGCqJChykbqg7riQ651dCNKw4gZB8ctCay2lXhBXMg
 1mqOcoG5WWL7//F+
 =tZRN
 -----END PGP SIGNATURE-----

Merge tag 'kbuild-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Support 'make compile_commands.json' to generate the compilation
   database more easily, avoiding stale entries

 - Support 'make clang-analyzer' and 'make clang-tidy' for static checks
   using clang-tidy

 - Preprocess scripts/modules.lds.S to allow CONFIG options in the
   module linker script

 - Drop cc-option tests from compiler flags supported by our minimal
   GCC/Clang versions

 - Use always 12-digits commit hash for CONFIG_LOCALVERSION_AUTO=y

 - Use sha1 build id for both BFD linker and LLD

 - Improve deb-pkg for reproducible builds and rootless builds

 - Remove stale, useless scripts/namespace.pl

 - Turn -Wreturn-type warning into error

 - Fix build error of deb-pkg when CONFIG_MODULES=n

 - Replace 'hostname' command with more portable 'uname -n'

 - Various Makefile cleanups

* tag 'kbuild-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (34 commits)
  kbuild: Use uname for LINUX_COMPILE_HOST detection
  kbuild: Only add -fno-var-tracking-assignments for old GCC versions
  kbuild: remove leftover comment for filechk utility
  treewide: remove DISABLE_LTO
  kbuild: deb-pkg: clean up package name variables
  kbuild: deb-pkg: do not build linux-headers package if CONFIG_MODULES=n
  kbuild: enforce -Werror=return-type
  scripts: remove namespace.pl
  builddeb: Add support for all required debian/rules targets
  builddeb: Enable rootless builds
  builddeb: Pass -n to gzip for reproducible packages
  kbuild: split the build log of kallsyms
  kbuild: explicitly specify the build id style
  scripts/setlocalversion: make git describe output more reliable
  kbuild: remove cc-option test of -Werror=date-time
  kbuild: remove cc-option test of -fno-stack-check
  kbuild: remove cc-option test of -fno-strict-overflow
  kbuild: move CFLAGS_{KASAN,UBSAN,KCSAN} exports to relevant Makefiles
  kbuild: remove redundant CONFIG_KASAN check from scripts/Makefile.kasan
  kbuild: do not create built-in objects for external module builds
  ...
2020-10-22 13:13:57 -07:00
Linus Torvalds 00937f36b0 pci-v5.10-changes
-----BEGIN PGP SIGNATURE-----
 
 iQJIBAABCgAyFiEEgMe7l+5h9hnxdsnuWYigwDrT+vwFAl+QUFkUHGJoZWxnYWFz
 QGdvb2dsZS5jb20ACgkQWYigwDrT+vw6SQ/9FHiAlHIa48/l5ZweqAuN3XnU8hoO
 sqMoJE8eqTkIYIT0aQdW6b1sDB0YE6b4UVxzg+UL/E0qYeJqgIUakig7QkyyF1qU
 aT5hq2ic+lk88G7AAxK3kgQGPk+JvP1EFIyOu6HBWzzDDzgLme1Iuh/5ulc2/lo+
 E4biy0WOnI8vMfCieXGK4bSpc17Rn0+3N4cuVwZXBlntsvicE90VqeWBzqti1sk5
 R6gkZuW+EIUNHHL7TLlkCeYZq6QNbXWzhfKCiaGW2wW4eJ4Ek1/ncQjyTbCFytKU
 7OIYvrH20XO3L5GEfJ5fdbWErI1dRpoHO4NmhWljyBcVh44VYnM2ixhA7TuJ+TOk
 OtMbtoJAlP+QDlVdAW6rmRYmMPLFK/AQl5Aq7ftY22b2rYXqP20BobPy2MpDT71T
 sGC8z0ABl/ijo23g3I+3/2VzP/RzGhZJ0ZqagrXj8jHtg8SVy2fLcR5nr/dlrgFk
 TG83zML6ui1KViyx5nzElaEtw18aTqP61CNQxijQtNoYwKBTtRKNTrdRr4Qo7Hi6
 6S+No3+4z8Kf8d90y0LkJQqr7JRkG6nI3AhXHO3rxXpXJOD2+QzlpwBZTQnASqq7
 3kC1doUPmN97rFUYPQWWyOs6xSMcGbGIz8Uus3shH6yDtNxgpnIVoctH55hTEh6w
 nSY/4ssIfzJxZCE=
 =RCFo
 -----END PGP SIGNATURE-----

Merge tag 'pci-v5.10-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Enumeration:
   - Print IRQ number used by PCIe Link Bandwidth Notification (Dongdong
     Liu)
   - Add schedule point in pci_read_config() to reduce max latency
     (Jiang Biao)
   - Add Kconfig options for MPS/MRRS strategy (Jim Quinlan)

  Resource management:
   - Fix pci_iounmap() memory leak when !CONFIG_GENERIC_IOMAP (Lorenzo
     Pieralisi)

  PCIe native device hotplug:
   - Reduce noisiness on hot removal (Lukas Wunner)

  Power management:
   - Revert "PCI/PM: Apply D2 delay as milliseconds, not microseconds"
     that was done on the basis of spec typo (Bjorn Helgaas)
   - Rename pci_dev.d3_delay to d3hot_delay to remove D3hot/D3cold
     ambiguity (Krzysztof Wilczyński)
   - Remove unused pcibios_pm_ops (Vaibhav Gupta)

  IOMMU:
   - Enable Translation Blocking for external devices to harden against
     DMA attacks (Rajat Jain)

  Error handling:
   - Add an ACPI APEI notifier chain for vendor CPER records to enable
     device-specific error handling (Shiju Jose)

  ASPM:
   - Remove struct aspm_register_info to simplify code (Saheed O.
     Bolarinwa)

  Amlogic Meson PCIe controller driver:
   - Build as module by default (Kevin Hilman)

  Ampere Altra PCIe controller driver:
   - Add MCFG quirk to work around non-standard ECAM implementation
     (Tuan Phan)

  Broadcom iProc PCIe controller driver:
   - Set affinity mask on MSI interrupts (Mark Tomlinson)

  Broadcom STB PCIe controller driver:
   - Make PCIE_BRCMSTB depend on ARCH_BRCMSTB (Jim Quinlan)
   - Add DT bindings for more Brcmstb chips (Jim Quinlan)
   - Add bcm7278 register info (Jim Quinlan)
   - Add bcm7278 PERST# support (Jim Quinlan)
   - Add suspend and resume pm_ops (Jim Quinlan)
   - Add control of rescal reset (Jim Quinlan)
   - Set additional internal memory DMA viewport sizes (Jim Quinlan)
   - Accommodate MSI for older chips (Jim Quinlan)
   - Set bus max burst size by chip type (Jim Quinlan)
   - Add support for bcm7211, bcm7216, bcm7445, bcm7278 (Jim Quinlan)

  Freescale i.MX6 PCIe controller driver:
   - Use dev_err_probe() to reduce redundant messages (Anson Huang)

  Freescale Layerscape PCIe controller driver:
   - Enforce 4K DMA buffer alignment in endpoint test (Hou Zhiqiang)
   - Add DT compatible strings for ls1088a, ls2088a (Xiaowei Bao)
   - Add endpoint support for ls1088a, ls2088a (Xiaowei Bao)
   - Add endpoint test support for lS1088a (Xiaowei Bao)
   - Add MSI-X support for ls1088a (Xiaowei Bao)

  HiSilicon HIP PCIe controller driver:
   - Handle HIP-specific errors via ACPI APEI (Yicong Yang)

  HiSilicon Kirin PCIe controller driver:
   - Return -EPROBE_DEFER if the GPIO isn't ready (Bean Huo)

  Intel VMD host bridge driver:
   - Factor out physical offset, bus offset, IRQ domain, IRQ allocation
     (Jon Derrick)
   - Use generic PCI PM correctly (Jon Derrick)

  Marvell Aardvark PCIe controller driver:
   - Fix compilation on s390 (Pali Rohár)
   - Implement driver 'remove' function and allow to build it as module
     (Pali Rohár)
   - Move PCIe reset card code to advk_pcie_train_link() (Pali Rohár)
   - Convert mvebu a3700 internal SMCC firmware return codes to errno
     (Pali Rohár)
   - Fix initialization with old Marvell's Arm Trusted Firmware (Pali
     Rohár)

  Microsoft Hyper-V host bridge driver:
   - Fix hibernation in case interrupts are not re-created (Dexuan Cui)

  NVIDIA Tegra PCIe controller driver:
   - Stop checking return value of debugfs_create() functions (Greg
     Kroah-Hartman)
   - Convert to use DEFINE_SEQ_ATTRIBUTE macro (Liu Shixin)

  Qualcomm PCIe controller driver:
   - Reset PCIe to work around Qsdk U-Boot issue (Ansuel Smith)

  Renesas R-Car PCIe controller driver:
   - Add DT documentation for r8a774a1, r8a774b1, r8a774e1 endpoints
     (Lad Prabhakar)
   - Add RZ/G2M, RZ/G2N, RZ/G2H IDs to endpoint test (Lad Prabhakar)
   - Add DT support for r8a7742 (Lad Prabhakar)

  Socionext UniPhier Pro5 controller driver:
   - Add DT descriptions of iATU register (host and endpoint) (Kunihiko
     Hayashi)

  Synopsys DesignWare PCIe controller driver:
   - Add link up check in dw_child_pcie_ops.map_bus() (racy, but seems
     unavoidable) (Hou Zhiqiang)
   - Fix endpoint Header Type check so multi-function devices work (Hou
     Zhiqiang)
   - Skip PCIE_MSI_INTR0* programming if MSI is disabled (Jisheng Zhang)
   - Stop leaking MSI page in suspend/resume (Jisheng Zhang)
   - Add common iATU register support instead of keystone-specific code
     (Kunihiko Hayashi)
   - Major config space access and other cleanups in dwc core and
     drivers that use it (al, exynos, histb, imx6, intel-gw, keystone,
     kirin, meson, qcom, tegra) (Rob Herring)
   - Add multiple PFs support for endpoint (Xiaowei Bao)
   - Add MSI-X doorbell mode in endpoint mode (Xiaowei Bao)

  Miscellaneous:
   - Use fallthrough pseudo-keyword (Gustavo A. R. Silva)
   - Fix "0 used as NULL pointer" warnings (Gustavo Pimentel)
   - Fix "cast truncates bits from constant value" warnings (Gustavo
     Pimentel)
   - Remove redundant zeroing for sg_init_table() (Julia Lawall)
   - Use scnprintf(), not snprintf(), in sysfs "show" functions
     (Krzysztof Wilczyński)
   - Remove unused assignments (Krzysztof Wilczyński)
   - Fix "0 used as NULL pointer" warning (Krzysztof Wilczyński)
   - Simplify bool comparisons (Krzysztof Wilczyński)
   - Use for_each_child_of_node() and for_each_node_by_name() (Qinglang
     Miao)
   - Simplify return expressions (Qinglang Miao)"

* tag 'pci-v5.10-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (147 commits)
  PCI: vmd: Update VMD PM to correctly use generic PCI PM
  PCI: vmd: Create IRQ allocation helper
  PCI: vmd: Create IRQ Domain configuration helper
  PCI: vmd: Create bus offset configuration helper
  PCI: vmd: Create physical offset helper
  PCI: v3-semi: Remove unneeded break
  PCI: dwc: Add link up check in dw_child_pcie_ops.map_bus()
  PCI/ASPM: Remove struct pcie_link_state.l1ss
  PCI/ASPM: Remove struct aspm_register_info.l1ss_cap
  PCI/ASPM: Pass L1SS Capabilities value, not struct aspm_register_info
  PCI/ASPM: Remove struct aspm_register_info.l1ss_ctl1
  PCI/ASPM: Remove struct aspm_register_info.l1ss_ctl2 (unused)
  PCI/ASPM: Remove struct aspm_register_info.l1ss_cap_ptr
  PCI/ASPM: Remove struct aspm_register_info.latency_encoding
  PCI/ASPM: Remove struct aspm_register_info.enabled
  PCI/ASPM: Remove struct aspm_register_info.support
  PCI/ASPM: Use 'parent' and 'child' for readability
  PCI/ASPM: Move LTR path check to where it's used
  PCI/ASPM: Move pci_clear_and_set_dword() earlier
  PCI: dwc: Fix MSI page leakage in suspend/resume
  ...
2020-10-22 12:41:00 -07:00
Linus Torvalds 7cf726a594 linux-kselftest-kunit-5.10-rc1
This Kunit update for Linux 5.10-rc1 consists of:
 
 - add Kunit to kernel_init() and remove KUnit from init calls entirely.
   This addresses the concern Kunit would not work correctly during
   late init phase.
 - add a linker section where KUnit can put references to its test suites.
   This patch is the first step in transitioning to dispatching all KUnit
   tests from a centralized executor rather than having each as its own
   separate late_initcall.
 - add a centralized executor to dispatch tests rather than relying on
   late_initcall to schedule each test suite separately. Centralized
   execution is for built-in tests only; modules will execute tests when
   loaded.
 - convert bitfield test to use KUnit framework
 - Documentation updates for naming guidelines and how kunit_test_suite()
   works.
 - add test plan to KUnit TAP format
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEPZKym/RZuOCGeA/kCwJExA0NQxwFAl+Mr68ACgkQCwJExA0N
 Qxy7HxAAuToPP6uUHwTC3KzVVE4hjP9a3t4hiD7kP/gI0umN+2nrccm6Vx6E+r9t
 Jkjiv9Yxj3riOkE5jJ8KriAx228mwz3N1yBEDfpp+8iCWOK3iOuFKKTTWOoZY4hf
 Enlf7n4Yp2TOEmIH0xwh/H67zl0+3FwT3fGWC6DDPXHuw+X+mGphCl9XPB70rZcT
 q/s0dwx1CmWBm30MgFXN+SZ7CgLP13lRAvkVO4t56/O1SkTbpCe7U1zqT2p5UoOY
 x7qvzs3pdCaWbpCsAqFWr46iECDHuVQjIgLuddOF/OgWVcCZlv7T7ESd7IDPHUPx
 DD3zYG0ODV0jKZHmpwkSojSbu3z6v5FnfhLpAcaHoEMBeRu5UIar7EjPHwqrqiU7
 JqE7dBECmcD308sr9u0w44DK15nmsD3+njrBQ/AJmsWdg0wtnMvA01nAHKObbk0n
 33aIu4Iny1dH35/rt9dV2DKT09f5r0ANCjoJMX8gu/li66FHGfULOaqr6KLLqi5X
 VPgHCKzyT9nD+Bc2LYzRWmhhAj+5Iwyglgpe9ZiOlPQ5i+hLvfPPAZxVYSbVA1Sk
 aVZi+ibKUqHSBfXcaLf/OKX7Csf4zni3F+WfFT5ZIC4Y6iEF+0tvS2HW2/pcUAN/
 OSPYYmyqhwYIl8tvbQENgBsyU/K1rECxJpqWAznJLRCebkY5a/s=
 =0Sco
 -----END PGP SIGNATURE-----

Merge tag 'linux-kselftest-kunit-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull more Kunit updates from Shuah Khan:

 - add Kunit to kernel_init() and remove KUnit from init calls entirely.

   This addresses the concern that Kunit would not work correctly during
   late init phase.

 - add a linker section where KUnit can put references to its test
   suites.

   This is the first step in transitioning to dispatching all KUnit
   tests from a centralized executor rather than having each as its own
   separate late_initcall.

 - add a centralized executor to dispatch tests rather than relying on
   late_initcall to schedule each test suite separately. Centralized
   execution is for built-in tests only; modules will execute tests when
   loaded.

 - convert bitfield test to use KUnit framework

 - Documentation updates for naming guidelines and how
   kunit_test_suite() works.

 - add test plan to KUnit TAP format

* tag 'linux-kselftest-kunit-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  lib: kunit: Fix compilation test when using TEST_BIT_FIELD_COMPILE
  lib: kunit: add bitfield test conversion to KUnit
  Documentation: kunit: add a brief blurb about kunit_test_suite
  kunit: test: add test plan to KUnit TAP format
  init: main: add KUnit to kernel init
  kunit: test: create a single centralized executor for all tests
  vmlinux.lds.h: add linker section for KUnit test suites
  Documentation: kunit: Add naming guidelines
2020-10-18 14:45:59 -07:00
Linus Torvalds 2d0f6b0aab hyperv-next for 5.10, part 2
-----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCAAxFiEEIbPD0id6easf0xsudhRwX5BBoF4FAl+IfF4THHdlaS5saXVA
 a2VybmVsLm9yZwAKCRB2FHBfkEGgXgdnCACUnI5sKbEN/uEvWz4JGJzTSwr20VHt
 FkzpbeS4A9vHgl4hXVvGc4eMrwF/RtWY6RrLlJauZSQA1mjU0paAjf2noBFYX41m
 zHX6f8awJrPd0cFChrOKcAlPnQy5OHYTJb7id2EakGGIrd0rmR/TkVAdEku23SDD
 N7wheh5dVLnkSPwfiERz8Iq0CswMrSjgTljKnwU7XqUqwcNt+7rLRDFAH/M3NG/x
 omBrWO8k6t2r0h4otqCQZIyCSLwPO+Wdb9BSaA147eOFHHbhqZlHNJYjIkMROZau
 CJn7S0nZorsAUvka3l7W8nyMQmK4PXOh36bwkXzpkV4b+lgit0euXIzA
 =H2vc
 -----END PGP SIGNATURE-----

Merge tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

Pull another Hyper-V update from Wei Liu:
 "One patch from Michael to get VMbus interrupt from ACPI DSDT"

* tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  Drivers: hv: vmbus: Add parsing of VMbus interrupt in ACPI DSDT
2020-10-15 15:48:06 -07:00
Linus Torvalds 5a32c3413d dma-mapping updates for 5.10
- rework the non-coherent DMA allocator
  - move private definitions out of <linux/dma-mapping.h>
  - lower CMA_ALIGNMENT (Paul Cercueil)
  - remove the omap1 dma address translation in favor of the common
    code
  - make dma-direct aware of multiple dma offset ranges (Jim Quinlan)
  - support per-node DMA CMA areas (Barry Song)
  - increase the default seg boundary limit (Nicolin Chen)
  - misc fixes (Robin Murphy, Thomas Tai, Xu Wang)
  - various cleanups
 -----BEGIN PGP SIGNATURE-----
 
 iQI/BAABCgApFiEEgdbnc3r/njty3Iq9D55TZVIEUYMFAl+IiPwLHGhjaEBsc3Qu
 ZGUACgkQD55TZVIEUYPKEQ//TM8vxjucnRl/pklpMin49dJorwiVvROLhQqLmdxw
 286ZKpVzYYAPc7LnNqwIBugnFZiXuHu8xPKQkIiOa2OtNDTwhKNoBxOAmOJaV6DD
 8JfEtZYeX5mKJ/Nqd2iSkIqOvCwZ9Wzii+aytJ2U88wezQr1fnyF4X49MegETEey
 FHWreSaRWZKa0MMRu9AQ0QxmoNTHAQUNaPc0PeqEtPULybfkGOGw4/ghSB7WcKrA
 gtKTuooNOSpVEHkTas2TMpcBp6lxtOjFqKzVN0ml+/nqq5NeTSDx91VOCX/6Cj76
 mXIg+s7fbACTk/BmkkwAkd0QEw4fo4tyD6Bep/5QNhvEoAriTuSRbhvLdOwFz0EF
 vhkF0Rer6umdhSK7nPd7SBqn8kAnP4vBbdmB68+nc3lmkqysLyE4VkgkdH/IYYQI
 6TJ0oilXWFmU6DT5Rm4FBqCvfcEfU2dUIHJr5wZHqrF2kLzoZ+mpg42fADoG4GuI
 D/oOsz7soeaRe3eYfWybC0omGR6YYPozZJ9lsfftcElmwSsFrmPsbO1DM5IBkj1B
 gItmEbOB9ZK3RhIK55T/3u1UWY3Uc/RVr+kchWvADGrWnRQnW0kxYIqDgiOytLFi
 JZNH8uHpJIwzoJAv6XXSPyEUBwXTG+zK37Ce769HGbUEaUrE71MxBbQAQsK8mDpg
 7fM=
 =Bkf/
 -----END PGP SIGNATURE-----

Merge tag 'dma-mapping-5.10' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping updates from Christoph Hellwig:

 - rework the non-coherent DMA allocator

 - move private definitions out of <linux/dma-mapping.h>

 - lower CMA_ALIGNMENT (Paul Cercueil)

 - remove the omap1 dma address translation in favor of the common code

 - make dma-direct aware of multiple dma offset ranges (Jim Quinlan)

 - support per-node DMA CMA areas (Barry Song)

 - increase the default seg boundary limit (Nicolin Chen)

 - misc fixes (Robin Murphy, Thomas Tai, Xu Wang)

 - various cleanups

* tag 'dma-mapping-5.10' of git://git.infradead.org/users/hch/dma-mapping: (63 commits)
  ARM/ixp4xx: add a missing include of dma-map-ops.h
  dma-direct: simplify the DMA_ATTR_NO_KERNEL_MAPPING handling
  dma-direct: factor out a dma_direct_alloc_from_pool helper
  dma-direct check for highmem pages in dma_direct_alloc_pages
  dma-mapping: merge <linux/dma-noncoherent.h> into <linux/dma-map-ops.h>
  dma-mapping: move large parts of <linux/dma-direct.h> to kernel/dma
  dma-mapping: move dma-debug.h to kernel/dma/
  dma-mapping: remove <asm/dma-contiguous.h>
  dma-mapping: merge <linux/dma-contiguous.h> into <linux/dma-map-ops.h>
  dma-contiguous: remove dma_contiguous_set_default
  dma-contiguous: remove dev_set_cma_area
  dma-contiguous: remove dma_declare_contiguous
  dma-mapping: split <linux/dma-mapping.h>
  cma: decrease CMA_ALIGNMENT lower limit to 2
  firewire-ohci: use dma_alloc_pages
  dma-iommu: implement ->alloc_noncoherent
  dma-mapping: add new {alloc,free}_noncoherent dma_map_ops methods
  dma-mapping: add a new dma_alloc_pages API
  dma-mapping: remove dma_cache_sync
  53c700: convert to dma_alloc_noncoherent
  ...
2020-10-15 14:43:29 -07:00
Michael Kelley 626b901f60 Drivers: hv: vmbus: Add parsing of VMbus interrupt in ACPI DSDT
On ARM64, Hyper-V now specifies the interrupt to be used by VMbus
in the ACPI DSDT.  This information is not used on x86 because the
interrupt vector must be hardcoded.  But update the generic
VMbus driver to do the parsing and pass the information to the
architecture specific code that sets up the Linux IRQ.  Update
consumers of the interrupt to get it from an architecture specific
function.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1597434304-40631-1-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2020-10-14 19:14:51 +00:00
Linus Torvalds e18afa5bfa Merge branch 'work.quota-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull compat quotactl cleanups from Al Viro:
 "More Christoph's compat cleanups: quotactl(2)"

* 'work.quota-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  quota: simplify the quotactl compat handling
  compat: add a compat_need_64bit_alignment_fixup() helper
  compat: lift compat_s64 and compat_u64 to <asm-generic/compat.h>
2020-10-12 16:37:13 -07:00
Linus Torvalds c90578360c Merge branch 'work.csum_and_copy' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull copy_and_csum cleanups from Al Viro:
 "Saner calling conventions for csum_and_copy_..._user() and friends"

[ Removing 800+ lines of code and cleaning stuff up is good  - Linus ]

* 'work.csum_and_copy' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  ppc: propagate the calling conventions change down to csum_partial_copy_generic()
  amd64: switch csum_partial_copy_generic() to new calling conventions
  sparc64: propagate the calling convention changes down to __csum_partial_copy_...()
  xtensa: propagate the calling conventions change down into csum_partial_copy_generic()
  mips: propagate the calling convention change down into __csum_partial_copy_..._user()
  mips: __csum_partial_copy_kernel() has no users left
  mips: csum_and_copy_{to,from}_user() are never called under KERNEL_DS
  sparc32: propagate the calling conventions change down to __csum_partial_copy_sparc_generic()
  i386: propagate the calling conventions change down to csum_partial_copy_generic()
  sh: propage the calling conventions change down to csum_partial_copy_generic()
  m68k: get rid of zeroing destination on error in csum_and_copy_from_user()
  arm: propagate the calling convention changes down to csum_partial_copy_from_user()
  alpha: propagate the calling convention changes down to csum_partial_copy.c helpers
  saner calling conventions for csum_and_copy_..._user()
  csum_and_copy_..._user(): pass 0xffffffff instead of 0 as initial sum
  csum_partial_copy_nocheck(): drop the last argument
  unify generic instances of csum_partial_copy_nocheck()
  icmp_push_reply(): reorder adding the checksum up
  skb_copy_and_csum_bits(): don't bother with the last argument
2020-10-12 16:24:13 -07:00
Linus Torvalds dd502a8107 This tree introduces static_call(), which is the idea of static_branch()
applied to indirect function calls. Remove a data load (indirection) by
 modifying the text.
 
 They give the flexibility of function pointers, but with better
 performance. (This is especially important for cases where
 retpolines would otherwise be used, as retpolines can be pretty
 slow.)
 
 API overview:
 
   DECLARE_STATIC_CALL(name, func);
   DEFINE_STATIC_CALL(name, func);
   DEFINE_STATIC_CALL_NULL(name, typename);
 
   static_call(name)(args...);
   static_call_cond(name)(args...);
   static_call_update(name, func);
 
 x86 is supported via text patching, otherwise basic indirect calls are used,
 with function pointers.
 
 There's a second variant using inline code patching, inspired by jump-labels,
 implemented on x86 as well.
 
 The new APIs are utilized in the x86 perf code, a heavy user of function pointers,
 where static calls speed up the PMU handler by 4.2% (!).
 
 The generic implementation is not really excercised on other architectures,
 outside of the trivial test_static_call_init() self-test.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAl+EfAQRHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1iEAw//divHeVCJnHhV+YBbuI9ROUsERkzu8VhK
 O1DEmW68Fvj7pszT8NZsMjtkt97ZtxDRK7aCJiiup0eItG9qCJ8lpCLb84ZbizHV
 HhCbhBLrpxSvTrWlQnkgP1OkPAbtoryIjVlZzWhjye2MY8UEbVnZWyviBolbAAxH
 Fk1Yi56fIMu19GO+9Ohzy9E2VDnVEH1iMx5YWoLD2H88Qbq/yEMP+U2tIj8hIVKT
 Y/jdogihNXRIau6QB+YPfDPisdty+RHxfU7zct4Rv8cFF5ylglZB5fD34C3sUQF2
 WqsaYz7zjUj9f02F8pw8hIaAT7InzArPhlNVITxf2oMfmdrNqBptnSCddZqCJLvv
 oDGew21k50Zcbqkv9amclpxXH5tTpRvJeqit2pz/85GMeqBRuhzHUAkCpht5YA73
 qJsHWS3z+qIxKi0tDbhDJswuwa51q5sgdUUwo1uCr3wT3DGDlqNhCAZBzX14dcty
 0shDSbv13TCwqAcb7asPzEoPwE15cwa+x+viGEIL901pyZKyQYjs/abDU26It3BW
 roWRkuVJZ9/QMdZJs1v7kaXw1L8YiKIDkBgke+xbfrDwEvvjudQkl2LUL66DB11j
 RJU3GyxKClvdY06SSRh/H13fqZLNKh1JZ0nPEWSTJECDFN9zcDjrDrod/7PFOcpY
 NAlawLoGG+s=
 =JvpF
 -----END PGP SIGNATURE-----

Merge tag 'core-static_call-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull static call support from Ingo Molnar:
 "This introduces static_call(), which is the idea of static_branch()
  applied to indirect function calls. Remove a data load (indirection)
  by modifying the text.

  They give the flexibility of function pointers, but with better
  performance. (This is especially important for cases where retpolines
  would otherwise be used, as retpolines can be pretty slow.)

  API overview:

      DECLARE_STATIC_CALL(name, func);
      DEFINE_STATIC_CALL(name, func);
      DEFINE_STATIC_CALL_NULL(name, typename);

      static_call(name)(args...);
      static_call_cond(name)(args...);
      static_call_update(name, func);

  x86 is supported via text patching, otherwise basic indirect calls are
  used, with function pointers.

  There's a second variant using inline code patching, inspired by
  jump-labels, implemented on x86 as well.

  The new APIs are utilized in the x86 perf code, a heavy user of
  function pointers, where static calls speed up the PMU handler by
  4.2% (!).

  The generic implementation is not really excercised on other
  architectures, outside of the trivial test_static_call_init()
  self-test"

* tag 'core-static_call-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
  static_call: Fix return type of static_call_init
  tracepoint: Fix out of sync data passing by static caller
  tracepoint: Fix overly long tracepoint names
  x86/perf, static_call: Optimize x86_pmu methods
  tracepoint: Optimize using static_call()
  static_call: Allow early init
  static_call: Add some validation
  static_call: Handle tail-calls
  static_call: Add static_call_cond()
  x86/alternatives: Teach text_poke_bp() to emulate RET
  static_call: Add simple self-test for static calls
  x86/static_call: Add inline static call implementation for x86-64
  x86/static_call: Add out-of-line static call implementation
  static_call: Avoid kprobes on inline static_call()s
  static_call: Add inline static call infrastructure
  static_call: Add basic static call infrastructure
  compiler.h: Make __ADDRESSABLE() symbol truly unique
  jump_label,module: Fix module lifetime for __jump_label_mod_text_reserved()
  module: Properly propagate MODULE_STATE_COMING failure
  module: Fix up module_notifier return values
  ...
2020-10-12 13:58:15 -07:00
Linus Torvalds 34eb62d868 Orphan link sections were a long-standing source of obscure bugs,
because the heuristics that various linkers & compilers use to handle them
 (include these bits into the output image vs discarding them silently)
 are both highly idiosyncratic and also version dependent.
 
 Instead of this historically problematic mess, this tree by Kees Cook (et al)
 adds build time asserts and build time warnings if there's any orphan section
 in the kernel or if a section is not sized as expected.
 
 And because we relied on so many silent assumptions in this area, fix a metric
 ton of dependencies and some outright bugs related to this, before we can
 finally enable the checks on the x86, ARM and ARM64 platforms.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAl+Edv4RHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1hiKBAApdJEOaK7hMc3013DYNctklIxEPJL2mFJ
 11YJRIh4pUJTF0TE+EHT/D+rSIuRsyuoSmOQBQ61/wVSnyG067GjjVJRqh/eYaJ1
 fDhJi2FuHOjXl+CiN0KxzBjjp+V4NhF7jHT59tpQSvfZeg7FjteoxfztxaCp5ek3
 S3wHB3CC4c4jE3lfjHem1E9/PwT4kwPYx1c3gAUdEqJdjkihjX9fWusfjLeqW6/d
 Y5VkApi6bL9XiZUZj5l0dEIweLJJ86+PkKJqpo3spxxEak1LSn1MEix+lcJ8e1Kg
 sb/bEEivDcmFlFWOJnn0QLquCR0Cx5bz1pwsL0tuf0yAd4+sXX5IMuGUysZlEdKM
 BHL9h5HbevGF4BScwZwZH7lyEg7q67s5KnRu4hxy0Swfcj7y0oT/9lXqpbpZ2DqO
 Hd+bRRQKIbqnTMp0hcit9LfpLp93vj0dBlaV5ocAJJlu62u9VnwGG5HQuZ5giLUr
 kA1SLw63Y1wopFRxgFyER8les7eLsu0zxHeK44rRVlVnfI99OMTOgVNicmDFy3Fm
 AfcnfJG0BqBEJGQz5es34uQQKKBwFPtC9NztopI62KiwOspYYZyrO1BNxdOc6DlS
 mIHrmO89HMXuid5eolvLaFqUWirHoWO8TlycgZxUWVHc2txVPjAEU/axouU/dSSU
 w/6GpzAa+7g=
 =fXAw
 -----END PGP SIGNATURE-----

Merge tag 'core-build-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull orphan section checking from Ingo Molnar:
 "Orphan link sections were a long-standing source of obscure bugs,
  because the heuristics that various linkers & compilers use to handle
  them (include these bits into the output image vs discarding them
  silently) are both highly idiosyncratic and also version dependent.

  Instead of this historically problematic mess, this tree by Kees Cook
  (et al) adds build time asserts and build time warnings if there's any
  orphan section in the kernel or if a section is not sized as expected.

  And because we relied on so many silent assumptions in this area, fix
  a metric ton of dependencies and some outright bugs related to this,
  before we can finally enable the checks on the x86, ARM and ARM64
  platforms"

* tag 'core-build-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
  x86/boot/compressed: Warn on orphan section placement
  x86/build: Warn on orphan section placement
  arm/boot: Warn on orphan section placement
  arm/build: Warn on orphan section placement
  arm64/build: Warn on orphan section placement
  x86/boot/compressed: Add missing debugging sections to output
  x86/boot/compressed: Remove, discard, or assert for unwanted sections
  x86/boot/compressed: Reorganize zero-size section asserts
  x86/build: Add asserts for unwanted sections
  x86/build: Enforce an empty .got.plt section
  x86/asm: Avoid generating unused kprobe sections
  arm/boot: Handle all sections explicitly
  arm/build: Assert for unwanted sections
  arm/build: Add missing sections
  arm/build: Explicitly keep .ARM.attributes sections
  arm/build: Refactor linker script headers
  arm64/build: Assert for unwanted sections
  arm64/build: Add missing DWARF sections
  arm64/build: Use common DISCARDS in linker script
  arm64/build: Remove .eh_frame* sections due to unwind tables
  ...
2020-10-12 13:39:19 -07:00
Peter Zijlstra 29f006fdef asm-generic/atomic: Add try_cmpxchg() fallbacks
Only x86 provides try_cmpxchg() outside of the atomic_t interfaces,
provide generic fallbacks to create this interface from the widely
available cmpxchg() function.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/159870621515.1229682.15506193091065001742.stgit@devnote2
2020-10-12 18:27:27 +02:00
Brendan Higgins 90a025a859 vmlinux.lds.h: add linker section for KUnit test suites
Add a linker section where KUnit can put references to its test suites.
This patch is the first step in transitioning to dispatching all KUnit
tests from a centralized executor rather than having each as its own
separate late_initcall.

Co-developed-by: Iurii Zaikin <yzaikin@google.com>
Signed-off-by: Iurii Zaikin <yzaikin@google.com>
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2020-10-09 14:37:15 -06:00
Ingo Molnar d6c4c11348 Merge branch 'kcsan' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into locking/core
Pull KCSAN updates for v5.10 from Paul E. McKenney:

 - Improve kernel messages.

 - Be more permissive with bitops races under KCSAN_ASSUME_PLAIN_WRITES_ATOMIC=y.

 - Optimize debugfs stat counters.

 - Introduce the instrument_*read_write() annotations, to provide a
   finer description of certain ops - using KCSAN's compound instrumentation.
   Use them for atomic RNW and bitops, where appropriate.
   Doing this might find new races.
   (Depends on the compiler having tsan-compound-read-before-write=1 support.)

 - Support atomic built-ins, which will help certain architectures, such as s390.

 - Misc enhancements and smaller fixes.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-10-09 08:56:02 +02:00
Christoph Hellwig 5db5d93089 dma-mapping: remove <asm/dma-contiguous.h>
Just provide a weak default definition of dma_contiguous_early_fixup and
let arm override it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-06 07:07:05 +02:00
Lorenzo Pieralisi f5810e5c32 asm-generic/io.h: Fix !CONFIG_GENERIC_IOMAP pci_iounmap() implementation
For arches that do not select CONFIG_GENERIC_IOMAP, the current
pci_iounmap() function does nothing causing obvious memory leaks
for mapped regions that are backed by MMIO physical space.

In order to detect if a mapped pointer is IO vs MMIO, a check must made
available to the pci_iounmap() function so that it can actually detect
whether the pointer has to be unmapped.

In configurations where CONFIG_HAS_IOPORT_MAP && !CONFIG_GENERIC_IOMAP,
a mapped port is detected using an ioport_map() stub defined in
asm-generic/io.h.

Use the same logic to implement a stub (ie __pci_ioport_unmap()) that
detects if the passed in pointer in pci_iounmap() is IO vs MMIO to
iounmap conditionally and call it in pci_iounmap() fixing the issue.

Leave __pci_ioport_unmap() as a NOP for all other config options.

Tested-by: George Cherian <george.cherian@marvell.com>
Link: https://lore.kernel.org/lkml/20200905024811.74701-1-yangyingliang@huawei.com
Link: https://lore.kernel.org/lkml/20200824132046.3114383-1-george.cherian@marvell.com
Link: https://lore.kernel.org/r/a9daf8d8444d0ebd00bc6d64e336ec49dbb50784.1600254147.git.lorenzo.pieralisi@arm.com
Reported-by: George Cherian <george.cherian@marvell.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: George Cherian <george.cherian@marvell.com>
Cc: Will Deacon <will@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Yang Yingliang <yangyingliang@huawei.com>
2020-10-05 09:44:16 +01:00
Christoph Hellwig 3c57fa13f6
asm-generic: make the set_fs implementation optional
Put all the set_fs related code under CONFIG_SET_FS so that
asm-generic/uaccess.h can be used for set_fs-less builds.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-10-04 10:27:02 -07:00
Christoph Hellwig 2d2d255467
asm-generic: add nommu implementations of __{get,put}_kernel_nofault
Add native implementations of __{get,put}_kernel_nofault using
{get,put}_unaligned, just like the {get,put}_user implementations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-10-04 10:26:57 -07:00
Christoph Hellwig 931de11f5a
asm-generic: improve the nommu {get,put}_user handling
Instead of reusing raw_{copy,to}_from_user implement separate handlers
using {get,put}_unaligned.  This ensures unaligned access is handled
correctly, and avoid the need for the small constant size optimization
in raw_{copy,to}_from_user.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-10-04 10:26:43 -07:00
Masahiro Yamada 596b0474d3 kbuild: preprocess module linker script
There was a request to preprocess the module linker script like we
do for the vmlinux one. (https://lkml.org/lkml/2020/8/21/512)

The difference between vmlinux.lds and module.lds is that the latter
is needed for external module builds, thus must be cleaned up by
'make mrproper' instead of 'make clean'. Also, it must be created
by 'make modules_prepare'.

You cannot put it in arch/$(SRCARCH)/kernel/, which is cleaned up by
'make clean'. I moved arch/$(SRCARCH)/kernel/module.lds to
arch/$(SRCARCH)/include/asm/module.lds.h, which is included from
scripts/module.lds.S.

scripts/module.lds is fine because 'make clean' keeps all the
build artifacts under scripts/.

You can add arch-specific sections in <asm/module.lds.h>.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Jessica Yu <jeyu@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Jessica Yu <jeyu@kernel.org>
2020-09-25 00:36:41 +09:00
Tony Ambardar 65c2043989 bpf: Prevent .BTF section elimination
Systems with memory or disk constraints often reduce the kernel footprint
by configuring LD_DEAD_CODE_DATA_ELIMINATION. However, this can result in
removal of any BTF information.

Use the KEEP() macro to preserve the BTF data as done with other important
sections, while still allowing for smaller kernels.

Fixes: 90ceddcb49 ("bpf: Support llvm-objcopy for vmlinux BTF")
Signed-off-by: Tony Ambardar <Tony.Ambardar@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/a635b5d3e2da044e7b51ec1315e8910fbce0083f.1600417359.git.Tony.Ambardar@gmail.com
2020-09-21 21:50:44 +02:00
Christoph Hellwig cc7886d25b compat: lift compat_s64 and compat_u64 to <asm-generic/compat.h>
lift the compat_s64 and compat_u64 definitions into common code using the
COMPAT_FOR_U64_ALIGNMENT symbol for the x86 special case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-09-17 13:00:46 -04:00
Josh Poimboeuf 1e7e478838 x86/static_call: Add inline static call implementation for x86-64
Add the inline static call implementation for x86-64. The generated code
is identical to the out-of-line case, except we move the trampoline into
it's own section.

Objtool uses the trampoline naming convention to detect all the call
sites. It then annotates those call sites in the .static_call_sites
section.

During boot (and module init), the call sites are patched to call
directly into the destination function.  The temporary trampoline is
then no longer used.

[peterz: merged trampolines, put trampoline in section]

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20200818135804.864271425@infradead.org
2020-09-01 09:58:05 +02:00
Josh Poimboeuf 9183c3f9ed static_call: Add inline static call infrastructure
Add infrastructure for an arch-specific CONFIG_HAVE_STATIC_CALL_INLINE
option, which is a faster version of CONFIG_HAVE_STATIC_CALL.  At
runtime, the static call sites are patched directly, rather than using
the out-of-line trampolines.

Compared to out-of-line static calls, the performance benefits are more
modest, but still measurable.  Steven Rostedt did some tracepoint
measurements:

  https://lkml.kernel.org/r/20181126155405.72b4f718@gandalf.local.home

This code is heavily inspired by the jump label code (aka "static
jumps"), as some of the concepts are very similar.

For more details, see the comments in include/linux/static_call.h.

[peterz: simplified interface; merged trampolines]

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20200818135804.684334440@infradead.org
2020-09-01 09:58:04 +02:00
Nick Desaulniers eff8728fe6 vmlinux.lds.h: Add PGO and AutoFDO input sections
Basically, consider .text.{hot|unlikely|unknown}.* part of .text, too.

When compiling with profiling information (collected via PGO
instrumentations or AutoFDO sampling), Clang will separate code into
.text.hot, .text.unlikely, or .text.unknown sections based on profiling
information. After D79600 (clang-11), these sections will have a
trailing `.` suffix, ie.  .text.hot., .text.unlikely., .text.unknown..

When using -ffunction-sections together with profiling infomation,
either explicitly (FGKASLR) or implicitly (LTO), code may be placed in
sections following the convention:
.text.hot.<foo>, .text.unlikely.<bar>, .text.unknown.<baz>
where <foo>, <bar>, and <baz> are functions.  (This produces one section
per function; we generally try to merge these all back via linker script
so that we don't have 50k sections).

For the above cases, we need to teach our linker scripts that such
sections might exist and that we'd explicitly like them grouped
together, otherwise we can wind up with code outside of the
_stext/_etext boundaries that might not be mapped properly for some
architectures, resulting in boot failures.

If the linker script is not told about possible input sections, then
where the section is placed as output is a heuristic-laiden mess that's
non-portable between linkers (ie. BFD and LLD), and has resulted in many
hard to debug bugs.  Kees Cook is working on cleaning this up by adding
--orphan-handling=warn linker flag used in ARCH=powerpc to additional
architectures. In the case of linker scripts, borrowing from the Zen of
Python: explicit is better than implicit.

Also, ld.bfd's internal linker script considers .text.hot AND
.text.hot.* to be part of .text, as well as .text.unlikely and
.text.unlikely.*. I didn't see support for .text.unknown.*, and didn't
see Clang producing such code in our kernel builds, but I see code in
LLVM that can produce such section names if profiling information is
missing. That may point to a larger issue with generating or collecting
profiles, but I would much rather be safe and explicit than have to
debug yet another issue related to orphan section placement.

Reported-by: Jian Cai <jiancai@google.com>
Suggested-by: Fāng-ruì Sòng <maskray@google.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Luis Lozano <llozano@google.com>
Tested-by: Manoj Gupta <manojgupta@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: linux-arch@vger.kernel.org
Cc: stable@vger.kernel.org
Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=add44f8d5c5c05e08b11e033127a744d61c26aee
Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=1de778ed23ce7492c523d5850c6c6dbb34152655
Link: https://reviews.llvm.org/D79600
Link: https://bugs.chromium.org/p/chromium/issues/detail?id=1084760
Link: https://lore.kernel.org/r/20200821194310.3089815-7-keescook@chromium.org

Debugged-by: Luis Lozano <llozano@google.com>
2020-09-01 09:50:35 +02:00
Kees Cook a840c4de56 vmlinux.lds.h: Add .symtab, .strtab, and .shstrtab to ELF_DETAILS
When linking vmlinux with LLD, the synthetic sections .symtab, .strtab,
and .shstrtab are listed as orphaned. Add them to the ELF_DETAILS section
so there will be no warnings when --orphan-handling=warn is used more
widely. (They are added above comment as it is the more common
order[1].)

ld.lld: warning: <internal>:(.symtab) is being placed in '.symtab'
ld.lld: warning: <internal>:(.shstrtab) is being placed in '.shstrtab'
ld.lld: warning: <internal>:(.strtab) is being placed in '.strtab'

[1] https://lore.kernel.org/lkml/20200622224928.o2a7jkq33guxfci4@google.com/

Reported-by: Fangrui Song <maskray@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/r/20200821194310.3089815-6-keescook@chromium.org
2020-09-01 09:50:35 +02:00
Kees Cook c604abc3f6 vmlinux.lds.h: Split ELF_DETAILS from STABS_DEBUG
The .comment section doesn't belong in STABS_DEBUG. Split it out into a
new macro named ELF_DETAILS. This will gain other non-debug sections
that need to be accounted for when linking with --orphan-handling=warn.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/r/20200821194310.3089815-5-keescook@chromium.org
2020-09-01 09:50:35 +02:00
Kees Cook d812db7828 vmlinux.lds.h: Avoid KASAN and KCSAN's unwanted sections
KASAN (-fsanitize=kernel-address) and KCSAN (-fsanitize=thread)
produce unwanted[1] .eh_frame and .init_array.* sections. Add them to
COMMON_DISCARDS, except with CONFIG_CONSTRUCTORS, which wants to keep
.init_array.* sections.

[1] https://bugs.llvm.org/show_bug.cgi?id=46478

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Marco Elver <elver@google.com>
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/r/20200821194310.3089815-4-keescook@chromium.org
2020-09-01 09:50:35 +02:00
Kees Cook dfbe69689b vmlinux.lds.h: Add .gnu.version* to COMMON_DISCARDS
For vmlinux linking, no architecture uses the .gnu.version* sections,
so remove it via the COMMON_DISCARDS macro in preparation for adding
--orphan-handling=warn more widely. This is a work-around for what
appears to be a bug[1] in ld.bfd which warns for this synthetic section
even when none is found in input objects, and even when no section is
emitted for an output object[2].

[1] https://sourceware.org/bugzilla/show_bug.cgi?id=26153
[2] https://lore.kernel.org/lkml/202006221524.CEB86E036B@keescook/

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Fangrui Song <maskray@google.com>
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/r/20200821194310.3089815-3-keescook@chromium.org
2020-09-01 09:50:35 +02:00
Kees Cook 03c2b85cb7 vmlinux.lds.h: Create COMMON_DISCARDS
Collect the common DISCARD sections for architectures that need more
specialized discard control than what the standard DISCARDS section
provides.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/r/20200821194310.3089815-2-keescook@chromium.org
2020-09-01 09:50:34 +02:00
Marco Elver 068df05363 bitops, kcsan: Partially revert instrumentation for non-atomic bitops
Previous to the change to distinguish read-write accesses, when
CONFIG_KCSAN_ASSUME_PLAIN_WRITES_ATOMIC=y is set, KCSAN would consider
the non-atomic bitops as atomic. We want to partially revert to this
behaviour, but with one important distinction: report racing
modifications, since lost bits due to non-atomicity are certainly
possible.

Given the operations here only modify a single bit, assuming
non-atomicity of the writer is sufficient may be reasonable for certain
usage (and follows the permissible nature of the "assume plain writes
atomic" rule). In other words:

	1. We want non-atomic read-modify-write races to be reported;
	   this is accomplished by kcsan_check_read(), where any
	   concurrent write (atomic or not) will generate a report.

	2. We do not want to report races with marked readers, but -do-
	   want to report races with unmarked readers; this is
	   accomplished by the instrument_write() ("assume atomic
	   write" with Kconfig option set).

With the above rules, when KCSAN_ASSUME_PLAIN_WRITES_ATOMIC is selected,
it is hoped that KCSAN's reporting behaviour is better aligned with
current expected permissible usage for non-atomic bitops.

Note that, a side-effect of not telling KCSAN that the accesses are
read-writes, is that this information is not displayed in the access
summary in the report. It is, however, visible in inline-expanded stack
traces. For now, it does not make sense to introduce yet another special
case to KCSAN's runtime, only to cater to the case here.

Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Daniel Axtens <dja@axtens.net>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2020-08-24 15:10:24 -07:00
Marco Elver 3570a1bcf4 locking/atomics: Use read-write instrumentation for atomic RMWs
Use instrument_atomic_read_write() for atomic RMW ops.

Cc: Will Deacon <will@kernel.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: <linux-arch@vger.kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2020-08-24 15:09:59 -07:00
Marco Elver b159eeccb7 asm-generic/bitops: Use instrument_read_write() where appropriate
Use the new instrument_read_write() where appropriate.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2020-08-24 15:09:59 -07:00
Al Viro 6e41c585e3 unify generic instances of csum_partial_copy_nocheck()
quite a few architectures have the same csum_partial_copy_nocheck() -
simply memcpy() the data and then return the csum of the copy.

hexagon, parisc, ia64, s390, um: explicitly spelled out that way.

arc, arm64, csky, h8300, m68k/nommu, microblaze, mips/GENERIC_CSUM, nds32,
nios2, openrisc, riscv, unicore32: end up picking the same thing spelled
out in lib/checksum.h (with varying amounts of perversions along the way).

everybody else (alpha, arm, c6x, m68k/mmu, mips/!GENERIC_CSUM, powerpc,
sh, sparc, x86, xtensa) have non-generic variants.  For all except c6x
the declaration is in their asm/checksum.h.  c6x uses the wrapper
from asm-generic/checksum.h that would normally lead to the lib/checksum.h
instance, but in case of c6x we end up using an asm function from arch/c6x
instead.

Screw that mess - have architectures with private instances define
_HAVE_ARCH_CSUM_AND_COPY in their asm/checksum.h and have the default
one right in net/checksum.h conditional on _HAVE_ARCH_CSUM_AND_COPY
*not* defined.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-08-20 15:45:14 -04:00
Krzysztof Kozlowski 8f28ca6bd8 iomap: constify ioreadX() iomem argument (as in generic implementation)
Patch series "iomap: Constify ioreadX() iomem argument", v3.

The ioread8/16/32() and others have inconsistent interface among the
architectures: some taking address as const, some not.

It seems there is nothing really stopping all of them to take pointer to
const.

This patch (of 4):

The ioreadX() and ioreadX_rep() helpers have inconsistent interface.  On
some architectures void *__iomem address argument is a pointer to const,
on some not.

Implementations of ioreadX() do not modify the memory under the address so
they can be converted to a "const" version for const-safety and
consistency among architectures.

[krzk@kernel.org: sh: clk: fix assignment from incompatible pointer type for ioreadX()]
  Link: http://lkml.kernel.org/r/20200723082017.24053-1-krzk@kernel.org
[akpm@linux-foundation.org: fix drivers/mailbox/bcm-pdc-mailbox.c]
  Link: http://lkml.kernel.org/r/202007132209.Rxmv4QyS%25lkp@intel.com

Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Jon Mason <jdmason@kudzu.us>
Cc: Allen Hubbe <allenbh@gmail.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Link: http://lkml.kernel.org/r/20200709072837.5869-1-krzk@kernel.org
Link: http://lkml.kernel.org/r/20200709072837.5869-2-krzk@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-14 19:56:57 -07:00
Romain Naour 7f897acbe5 include/asm-generic/vmlinux.lds.h: align ro_after_init
Since the patch [1], building the kernel using a toolchain built with
binutils 2.33.1 prevents booting a sh4 system under Qemu.  Apply the patch
provided by Alan Modra [2] that fix alignment of rodata.

[1] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=ebd2263ba9a9124d93bbc0ece63d7e0fae89b40e
[2] https://www.sourceware.org/ml/binutils/2019-12/msg00112.html

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alan Modra <amodra@gmail.com>
Cc: Bin Meng <bin.meng@windriver.com>
Cc: Chen Zhou <chenzhou10@huawei.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Cc: Rich Felker <dalias@libc.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: <stable@vger.kernel.org>
Link: https://marc.info/?l=linux-sh&m=158429470221261
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-14 19:56:57 -07:00
Mike Rapoport 9922c1deff asm-generic: pgalloc.h: use correct #ifdef to enable pud_alloc_one()
The #ifdef statement that guards the generic version of pud_alloc_one() by
mistake used __HAVE_ARCH_PUD_FREE instead of __HAVE_ARCH_PUD_ALLOC_ONE.

Fix it.

Fixes: d9e8b92967 ("asm-generic: pgalloc: provide generic pud_alloc_one() and pud_free_one()")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20200812191415.GE163101@linux.ibm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-14 19:56:55 -07:00
Linus Torvalds e1d74fbe50 OpenRISC updates for 5.9
A few patches all over the place during this cycle, mostly bug and
 sparse warning fixes for OpenRISC, but a few enhancements too.  Note,
 there are 2 non OpenRISC specific fixups.
 
 Non OpenRISC fixes:
 
  - In init we need to align the init_task correctly to fix an issue with
    MUTEX_FLAGS, reviewed by Peter Z.  No one picked this up so I kept it
    on my tree.
  - In asm-generic/io.h I fixed up some sparse warnings, OK'd by Arnd.
    Arnd asked to merge it via my tree.
 
 OpenRISC fixes:
 
  - Many fixes for OpenRISC sprase warnings.
  - Add support OpenRISC SMP tlb flushing rather than always flushing the
    entire TLB on every CPU.
  - Fix bug when dumping stack via /proc/xxx/stack of user threads.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEE2cRzVK74bBA6Je/xw7McLV5mJ+QFAl829wgACgkQw7McLV5m
 J+RvMg/+Ik9jmHiCoDilVzB5yqJ0Ea8oLjg75V9eBE3YtnYJMAbDHb8ye2OsYrlp
 QhrAHFi8PB7nJQphod3XXt8Y5JWMYjKIgdazybVQtUlD5IAXgYAR6/IxJ1DVzxa0
 AzJ7TGmYSxnhW7GzbRU5xjgdIi5cKQjBUcVM/blDQB6/GZ4wY3OBxK1pn0kNXMPU
 gnS+0yPDlwXaZw67YmbF5kF34lvEe0knkOaxxP/S0t2ROb6Xu0PJCEDTbdcGApsB
 2xdm0dJwK50ulS0/HWxC18vC/R7d1b0qjR+xvisjydHbZawEN2Kcf3mOCSAETSTk
 ST1WFxuTAObqdyc4F15tdsqFvbchPtCH9UAjkkSbmRxGVOKQa88NmW1A+s0hj4BX
 enf6I9SYzqiU/WkuFDwSnJ4NETOpPaUVqZbi3WTUfljyXmOdqXbT+416YxViOXpx
 OtSyGVN18qs8wjsWlWiGyhM/eAnHwr9q0q1kJ8VZTh+nQSnQFmuWjHSfRan2PkmQ
 nnbvXHXJcgWYVlk+JZLOnhOB3zrkH5xmlM2UakVUvP92ESnnSmBCC0RLA0k6kGZ3
 PkFBbY4etbA7Ug8r1KueOaqHKwJpTpIb4tU75y3KXyi05FeLEln1doC5M4EQUPDy
 eXzdWj6afuEKmAPILiEYlSVXO3t8iIncVBkK7isaR37dURNnJWE=
 =0MlF
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://github.com/openrisc/linux

Pull OpenRISC updates from Stafford Horne:
 "A few patches all over the place during this cycle, mostly bug and
  sparse warning fixes for OpenRISC, but a few enhancements too. Note,
  there are 2 non OpenRISC specific fixups.

  Non OpenRISC fixes:

   - In init we need to align the init_task correctly to fix an issue
     with MUTEX_FLAGS, reviewed by Peter Z. No one picked this up so I
     kept it on my tree.

   - In asm-generic/io.h I fixed up some sparse warnings, OK'd by Arnd.
     Arnd asked to merge it via my tree.

  OpenRISC fixes:

   - Many fixes for OpenRISC sprase warnings.

   - Add support OpenRISC SMP tlb flushing rather than always flushing
     the entire TLB on every CPU.

   - Fix bug when dumping stack via /proc/xxx/stack of user threads"

* tag 'for-linus' of git://github.com/openrisc/linux:
  openrisc: uaccess: Add user address space check to access_ok
  openrisc: signal: Fix sparse address space warnings
  openrisc: uaccess: Remove unused macro __addr_ok
  openrisc: uaccess: Use static inline function in access_ok
  openrisc: uaccess: Fix sparse address space warnings
  openrisc: io: Fixup defines and move include to the end
  asm-generic/io.h: Fix sparse warnings on big-endian architectures
  openrisc: Implement proper SMP tlb flushing
  openrisc: Fix oops caused when dumping stack
  openrisc: Add support for external initrd images
  init: Align init_task to avoid conflict with MUTEX_FLAGS
  openrisc: fix __user in raw_copy_to_user()'s prototype
2020-08-14 14:04:53 -07:00
Linus Torvalds cd94257d7a hyperv-fixes for 5.9-rc
-----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCAAxFiEEIbPD0id6easf0xsudhRwX5BBoF4FAl82Y6cTHHdlaS5saXVA
 a2VybmVsLm9yZwAKCRB2FHBfkEGgXlcxCACP21ZI7RZvQBcFtTj5MWa0uwoofFqF
 JDG0MvZ5zFKIJFX0pwlZIUrZY5aVJ1NwCDgCI0EXbZEazTaNCD2knFPqrLe3WUFY
 mSDF9df7oW9UvTe9L4g3rYAdqsrkbgqhBypm9Vpbcazg/Ki6QVCgAhIo1lbq62+m
 J2/0kLO1lVY6opr6vyobaWbm/Y4b0fbrx7N6KwUDhZUYGLGKaOc+WvsZinNl4XW6
 VPiEVQUApvVxwG43rLNXjPe83DtassJ2GevSS1whXnZ+K0bViWhyYicbqEl9iV1i
 nlNIkEMX5A1rdwV1zEAGyY/zWi+fi2+IdKGGEbtyUsely1vHtZuaDCiQ
 =DE2Y
 -----END PGP SIGNATURE-----

Merge tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

Pull hyper-v fixes from Wei Liu:

 - fix oops reporting on Hyper-V

 - make objtool happy

* tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  x86/hyperv: Make hv_setup_sched_clock inline
  Drivers: hv: vmbus: Only notify Hyper-V for die events that are oops
2020-08-14 13:31:25 -07:00
Linus Torvalds 7a02c8d45b Merge branch 'parisc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull more parisc updates from Helge Deller:

 - Oscar Carter contributed a patch which fixes parisc's usage of
   dereference_function_descriptor() and thus will allow using the
   -Wcast-function-type compiler option in the top-level Makefile

 - Sven Schnelle fixed a bug in the SBA code to prevent crashes during
   kexec

 - John David Anglin provided implementations for __smp_store_release()
   and __smp_load_acquire barriers() which avoids using the sync
   assembler instruction and thus speeds up barrier paths

 - Some whitespace cleanups in parisc's atomic.h header file

* 'parisc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Implement __smp_store_release and __smp_load_acquire barriers
  parisc: mask out enable and reserved bits from sba imask
  parisc: Whitespace cleanups in atomic.h
  parisc/kernel/ftrace: Remove function callback casts
  sections.h: dereference_function_descriptor() returns void pointer
2020-08-12 12:41:15 -07:00
Christoph Hellwig 428e2976a5 uaccess: remove segment_eq
segment_eq is only used to implement uaccess_kernel.  Just open code
uaccess_kernel in the arch uaccess headers and remove one layer of
indirection.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Greentime Hu <green.hu@gmail.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Link: http://lkml.kernel.org/r/20200710135706.537715-5-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-12 10:57:58 -07:00
Michael Kelley b9d8cf2eb3 x86/hyperv: Make hv_setup_sched_clock inline
Make hv_setup_sched_clock inline so the reference to pv_ops works
correctly with objtool updates to detect noinstr violations.
See https://lore.kernel.org/patchwork/patch/1283635/

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/1597022991-24088-1-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2020-08-11 10:41:15 +00:00
Helge Deller 60e5da629a sections.h: dereference_function_descriptor() returns void pointer
The function dereference_function_descriptor() takes on hppa64, ppc64
and ia64 a pointer to a function descriptor and returns a (void) pointer
to the dereferenced function.
To make cross-arch coding easier, on all other architectures the
dereference_function_descriptor() macro should return a void pointer
too.

Signed-off-by: Helge Deller <deller@gmx.de>
2020-08-11 12:06:15 +02:00
Linus Torvalds 81e11336d9 Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton:

 - a few MM hotfixes

 - kthread, tools, scripts, ntfs and ocfs2

 - some of MM

Subsystems affected by this patch series: kthread, tools, scripts, ntfs,
ocfs2 and mm (hofixes, pagealloc, slab-generic, slab, slub, kcsan,
debug, pagecache, gup, swap, shmem, memcg, pagemap, mremap, mincore,
sparsemem, vmalloc, kasan, pagealloc, hugetlb and vmscan).

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (162 commits)
  mm: vmscan: consistent update to pgrefill
  mm/vmscan.c: fix typo
  khugepaged: khugepaged_test_exit() check mmget_still_valid()
  khugepaged: retract_page_tables() remember to test exit
  khugepaged: collapse_pte_mapped_thp() protect the pmd lock
  khugepaged: collapse_pte_mapped_thp() flush the right range
  mm/hugetlb: fix calculation of adjust_range_if_pmd_sharing_possible
  mm: thp: replace HTTP links with HTTPS ones
  mm/page_alloc: fix memalloc_nocma_{save/restore} APIs
  mm/page_alloc.c: skip setting nodemask when we are in interrupt
  mm/page_alloc: fallbacks at most has 3 elements
  mm/page_alloc: silence a KASAN false positive
  mm/page_alloc.c: remove unnecessary end_bitidx for [set|get]_pfnblock_flags_mask()
  mm/page_alloc.c: simplify pageblock bitmap access
  mm/page_alloc.c: extract the common part in pfn_to_bitidx()
  mm/page_alloc.c: replace the definition of NR_MIGRATETYPE_BITS with PB_migratetype_bits
  mm/shuffle: remove dynamic reconfiguration
  mm/memory_hotplug: document why shuffle_zone() is relevant
  mm/page_alloc: remove nr_free_pagecache_pages()
  mm: remove vm_total_pages
  ...
2020-08-07 11:39:33 -07:00
Mike Rapoport f9cb654cb5 asm-generic: pgalloc: provide generic pgd_free()
Most architectures define pgd_free() as a wrapper for free_page().

Provide a generic version in asm-generic/pgalloc.h and enable its use for
most architectures.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>	[m68k]
Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Matthew Wilcox <willy@infradead.org>
Link: http://lkml.kernel.org/r/20200627143453.31835-7-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-07 11:33:26 -07:00
Mike Rapoport d9e8b92967 asm-generic: pgalloc: provide generic pud_alloc_one() and pud_free_one()
Several architectures define pud_alloc_one() as a wrapper for
__get_free_page() and pud_free() as a wrapper for free_page().

Provide a generic implementation in asm-generic/pgalloc.h and use it where
appropriate.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Matthew Wilcox <willy@infradead.org>
Link: http://lkml.kernel.org/r/20200627143453.31835-6-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-07 11:33:26 -07:00
Mike Rapoport 1355c31eeb asm-generic: pgalloc: provide generic pmd_alloc_one() and pmd_free_one()
For most architectures that support >2 levels of page tables,
pmd_alloc_one() is a wrapper for __get_free_pages(), sometimes with
__GFP_ZERO and sometimes followed by memset(0) instead.

More elaborate versions on arm64 and x86 account memory for the user page
tables and call to pgtable_pmd_page_ctor() as the part of PMD page
initialization.

Move the arm64 version to include/asm-generic/pgalloc.h and use the
generic version on several architectures.

The pgtable_pmd_page_ctor() is a NOP when ARCH_ENABLE_SPLIT_PMD_PTLOCK is
not enabled, so there is no functional change for most architectures
except of the addition of __GFP_ACCOUNT for allocation of user page
tables.

The pmd_free() is a wrapper for free_page() in all the cases, so no
functional change here.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Link: http://lkml.kernel.org/r/20200627143453.31835-5-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-07 11:33:26 -07:00
Mike Rapoport ca15ca406f mm: remove unneeded includes of <asm/pgalloc.h>
Patch series "mm: cleanup usage of <asm/pgalloc.h>"

Most architectures have very similar versions of pXd_alloc_one() and
pXd_free_one() for intermediate levels of page table.  These patches add
generic versions of these functions in <asm-generic/pgalloc.h> and enable
use of the generic functions where appropriate.

In addition, functions declared and defined in <asm/pgalloc.h> headers are
used mostly by core mm and early mm initialization in arch and there is no
actual reason to have the <asm/pgalloc.h> included all over the place.
The first patch in this series removes unneeded includes of
<asm/pgalloc.h>

In the end it didn't work out as neatly as I hoped and moving
pXd_alloc_track() definitions to <asm-generic/pgalloc.h> would require
unnecessary changes to arches that have custom page table allocations, so
I've decided to move lib/ioremap.c to mm/ and make pgalloc-track.h local
to mm/.

This patch (of 8):

In most cases <asm/pgalloc.h> header is required only for allocations of
page table memory.  Most of the .c files that include that header do not
use symbols declared in <asm/pgalloc.h> and do not require that header.

As for the other header files that used to include <asm/pgalloc.h>, it is
possible to move that include into the .c file that actually uses symbols
from <asm/pgalloc.h> and drop the include from the header file.

The process was somewhat automated using

	sed -i -E '/[<"]asm\/pgalloc\.h/d' \
                $(grep -L -w -f /tmp/xx \
                        $(git grep -E -l '[<"]asm/pgalloc\.h'))

where /tmp/xx contains all the symbols defined in
arch/*/include/asm/pgalloc.h.

[rppt@linux.ibm.com: fix powerpc warning]

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>	[m68k]
Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Matthew Wilcox <willy@infradead.org>
Link: http://lkml.kernel.org/r/20200627143453.31835-1-rppt@kernel.org
Link: http://lkml.kernel.org/r/20200627143453.31835-2-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-07 11:33:26 -07:00
Linus Torvalds 25d8d4eeca powerpc updates for 5.9
- Add support for (optionally) using queued spinlocks & rwlocks.
 
  - Support for a new faster system call ABI using the scv instruction on Power9
    or later.
 
  - Drop support for the PROT_SAO mmap/mprotect flag as it will be unsupported on
    Power10 and future processors, leaving us with no way to implement the
    functionality it requests. This risks breaking userspace, though we believe
    it is unused in practice.
 
  - A bug fix for, and then the removal of, our custom stack expansion checking.
    We now allow stack expansion up to the rlimit, like other architectures.
 
  - Remove the remnants of our (previously disabled) topology update code, which
    tried to react to NUMA layout changes on virtualised systems, but was prone
    to crashes and other problems.
 
  - Add PMU support for Power10 CPUs.
 
  - A change to our signal trampoline so that we don't unbalance the link stack
    (branch return predictor) in the signal delivery path.
 
  - Lots of other cleanups, refactorings, smaller features and so on as usual.
 
 Thanks to:
   Abhishek Goel, Alastair D'Silva, Alexander A. Klimov, Alexey Kardashevskiy,
   Alistair Popple, Andrew Donnellan, Aneesh Kumar K.V, Anju T Sudhakar, Anton
   Blanchard, Arnd Bergmann, Athira Rajeev, Balamuruhan S, Bharata B Rao, Bill
   Wendling, Bin Meng, Cédric Le Goater, Chris Packham, Christophe Leroy,
   Christoph Hellwig, Daniel Axtens, Dan Williams, David Lamparter, Desnes A.
   Nunes do Rosario, Erhard F., Finn Thain, Frederic Barrat, Ganesh Goudar,
   Gautham R. Shenoy, Geoff Levand, Greg Kurz, Gustavo A. R. Silva, Hari Bathini,
   Harish, Imre Kaloz, Joel Stanley, Joe Perches, John Crispin, Jordan Niethe,
   Kajol Jain, Kamalesh Babulal, Kees Cook, Laurent Dufour, Leonardo Bras, Li
   RongQing, Madhavan Srinivasan, Mahesh Salgaonkar, Mark Cave-Ayland, Michal
   Suchanek, Milton Miller, Mimi Zohar, Murilo Opsfelder Araujo, Nathan
   Chancellor, Nathan Lynch, Naveen N. Rao, Nayna Jain, Nicholas Piggin, Oliver
   O'Halloran, Palmer Dabbelt, Pedro Miraglia Franco de Carvalho, Philippe
   Bergheaud, Pingfan Liu, Pratik Rajesh Sampat, Qian Cai, Qinglang Miao, Randy
   Dunlap, Ravi Bangoria, Sachin Sant, Sam Bobroff, Sandipan Das, Santosh
   Sivaraj, Satheesh Rajendran, Shirisha Ganta, Sourabh Jain, Srikar Dronamraju,
   Stan Johnson, Stephen Rothwell, Thadeu Lima de Souza Cascardo, Thiago Jung
   Bauermann, Tom Lane, Vaibhav Jain, Vladis Dronov, Wei Yongjun, Wen Xiong,
   YueHaibing.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCAAxFiEEJFGtCPCthwEv2Y/bUevqPMjhpYAFAl8tOxATHG1wZUBlbGxl
 cm1hbi5pZC5hdQAKCRBR6+o8yOGlgDQfEAClXHWf6hnxB84bEu39D51NkVotL1IG
 BRWFvyix+xHuUkHIouBPAAMl6ngY5X6wkYd+Z+CY9zHNtdSDoVlJE30YXdMQA/dE
 L/rYxR1884yGR/uU/3wusboO68ReXwcKQPmKOymUfh0zH7ujyJsSWLpXFK1YDC5d
 2TVVTi0Q+P5ucMHDh0L+AHirIxZvtZSp43+J7xLtywsj+XAxJWCTGo5WCJbdgbCA
 Qbv3aOkVyUa3EgsbdM/STPpv82ebqT+PHxeSIO4Jw6ZODtKRH0R5YsWCApuY9eZ+
 ebY9RLmgv9ZAhJqB2fv9A5NDcMoGpZNmjM7HrWpXwULKQpkBGHCzJ9FcSdHVMOx8
 nbVMFjt4uzLwV1w8lFYslQ2tNH/uH2o9BlryV1RLpiiKokDAJO/NOsWN9y0u/I4J
 EmAM5DSX2LgVvvas96IlGK8KX4xkOkf8FLX/H5UDvvAfloH8J4CZXk/CWCab/nqY
 KEHPnMmYvQZ1w9SzyZg9sO/1p6Bl1Gmm75Jv2F1lBiRW/42VcGBI/qLsJ4lC59Fc
 KbwufYNYYG38wbxDLW1HAPJhRonxIcaZj3EEqk7aTiLZ55nNbu8e2k32CpNXTGqt
 npOhzJHimcq7L6+878ZW+xpbZwogIEUdRSsmwb6aT8za3ShnYwSA2Q3LYxh9xyGH
 j3GifvPq6Efp3Q==
 =QMY1
 -----END PGP SIGNATURE-----

Merge tag 'powerpc-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - Add support for (optionally) using queued spinlocks & rwlocks.

 - Support for a new faster system call ABI using the scv instruction on
   Power9 or later.

 - Drop support for the PROT_SAO mmap/mprotect flag as it will be
   unsupported on Power10 and future processors, leaving us with no way
   to implement the functionality it requests. This risks breaking
   userspace, though we believe it is unused in practice.

 - A bug fix for, and then the removal of, our custom stack expansion
   checking. We now allow stack expansion up to the rlimit, like other
   architectures.

 - Remove the remnants of our (previously disabled) topology update
   code, which tried to react to NUMA layout changes on virtualised
   systems, but was prone to crashes and other problems.

 - Add PMU support for Power10 CPUs.

 - A change to our signal trampoline so that we don't unbalance the link
   stack (branch return predictor) in the signal delivery path.

 - Lots of other cleanups, refactorings, smaller features and so on as
   usual.

Thanks to: Abhishek Goel, Alastair D'Silva, Alexander A. Klimov, Alexey
Kardashevskiy, Alistair Popple, Andrew Donnellan, Aneesh Kumar K.V, Anju
T Sudhakar, Anton Blanchard, Arnd Bergmann, Athira Rajeev, Balamuruhan
S, Bharata B Rao, Bill Wendling, Bin Meng, Cédric Le Goater, Chris
Packham, Christophe Leroy, Christoph Hellwig, Daniel Axtens, Dan
Williams, David Lamparter, Desnes A. Nunes do Rosario, Erhard F., Finn
Thain, Frederic Barrat, Ganesh Goudar, Gautham R. Shenoy, Geoff Levand,
Greg Kurz, Gustavo A. R. Silva, Hari Bathini, Harish, Imre Kaloz, Joel
Stanley, Joe Perches, John Crispin, Jordan Niethe, Kajol Jain, Kamalesh
Babulal, Kees Cook, Laurent Dufour, Leonardo Bras, Li RongQing, Madhavan
Srinivasan, Mahesh Salgaonkar, Mark Cave-Ayland, Michal Suchanek, Milton
Miller, Mimi Zohar, Murilo Opsfelder Araujo, Nathan Chancellor, Nathan
Lynch, Naveen N. Rao, Nayna Jain, Nicholas Piggin, Oliver O'Halloran,
Palmer Dabbelt, Pedro Miraglia Franco de Carvalho, Philippe Bergheaud,
Pingfan Liu, Pratik Rajesh Sampat, Qian Cai, Qinglang Miao, Randy
Dunlap, Ravi Bangoria, Sachin Sant, Sam Bobroff, Sandipan Das, Santosh
Sivaraj, Satheesh Rajendran, Shirisha Ganta, Sourabh Jain, Srikar
Dronamraju, Stan Johnson, Stephen Rothwell, Thadeu Lima de Souza
Cascardo, Thiago Jung Bauermann, Tom Lane, Vaibhav Jain, Vladis Dronov,
Wei Yongjun, Wen Xiong, YueHaibing.

* tag 'powerpc-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (337 commits)
  selftests/powerpc: Fix pkey syscall redefinitions
  powerpc: Fix circular dependency between percpu.h and mmu.h
  powerpc/powernv/sriov: Fix use of uninitialised variable
  selftests/powerpc: Skip vmx/vsx/tar/etc tests on older CPUs
  powerpc/40x: Fix assembler warning about r0
  powerpc/papr_scm: Add support for fetching nvdimm 'fuel-gauge' metric
  powerpc/papr_scm: Fetch nvdimm performance stats from PHYP
  cpuidle: pseries: Fixup exit latency for CEDE(0)
  cpuidle: pseries: Add function to parse extended CEDE records
  cpuidle: pseries: Set the latency-hint before entering CEDE
  selftests/powerpc: Fix online CPU selection
  powerpc/perf: Consolidate perf_callchain_user_[64|32]()
  powerpc/pseries/hotplug-cpu: Remove double free in error path
  powerpc/pseries/mobility: Add pr_debug() for device tree changes
  powerpc/pseries/mobility: Set pr_fmt()
  powerpc/cacheinfo: Warn if cache object chain becomes unordered
  powerpc/cacheinfo: Improve diagnostics about malformed cache lists
  powerpc/cacheinfo: Use name@unit instead of full DT path in debug messages
  powerpc/cacheinfo: Set pr_fmt()
  powerpc: fix function annotations to avoid section mismatch warnings with gcc-10
  ...
2020-08-07 10:33:50 -07:00
Linus Torvalds 921d2597ab s390: implement diag318
x86:
 * Report last CPU for debugging
 * Emulate smaller MAXPHYADDR in the guest than in the host
 * .noinstr and tracing fixes from Thomas
 * nested SVM page table switching optimization and fixes
 
 Generic:
 * Unify shadow MMU cache data structures across architectures
 -----BEGIN PGP SIGNATURE-----
 
 iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAl8pC+oUHHBib256aW5p
 QHJlZGhhdC5jb20ACgkQv/vSX3jHroNcOwgAjomqtEqQNlp7DdZT7VyyklzbxX1/
 ud7v+oOJ8K4sFlf64lSthjPo3N9rzZCcw+yOXmuyuITngXOGc3tzIwXpCzpLtuQ1
 WO1Ql3B/2dCi3lP5OMmsO1UAZqy9pKLg1dfeYUPk48P5+p7d/NPmk+Em5kIYzKm5
 JsaHfCp2EEXomwmljNJ8PQ1vTjIQSSzlgYUBZxmCkaaX7zbEUMtxAQCStHmt8B84
 33LczwXBm3viSWrzsoBV37I70+tseugiSGsCfUyupXOvq55d6D9FCqtCb45Hn4Vh
 Ik8ggKdalsk/reiGEwNw1/3nr6mRMkHSbl+Mhc4waOIFf9dn0urgQgOaDg==
 =YVx0
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Paolo Bonzini:
 "s390:
   - implement diag318

  x86:
   - Report last CPU for debugging
   - Emulate smaller MAXPHYADDR in the guest than in the host
   - .noinstr and tracing fixes from Thomas
   - nested SVM page table switching optimization and fixes

  Generic:
   - Unify shadow MMU cache data structures across architectures"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (127 commits)
  KVM: SVM: Fix sev_pin_memory() error handling
  KVM: LAPIC: Set the TDCR settable bits
  KVM: x86: Specify max TDP level via kvm_configure_mmu()
  KVM: x86/mmu: Rename max_page_level to max_huge_page_level
  KVM: x86: Dynamically calculate TDP level from max level and MAXPHYADDR
  KVM: VXM: Remove temporary WARN on expected vs. actual EPTP level mismatch
  KVM: x86: Pull the PGD's level from the MMU instead of recalculating it
  KVM: VMX: Make vmx_load_mmu_pgd() static
  KVM: x86/mmu: Add separate helper for shadow NPT root page role calc
  KVM: VMX: Drop a duplicate declaration of construct_eptp()
  KVM: nSVM: Correctly set the shadow NPT root level in its MMU role
  KVM: Using macros instead of magic values
  MIPS: KVM: Fix build error caused by 'kvm_run' cleanup
  KVM: nSVM: remove nonsensical EXITINFO1 adjustment on nested NPF
  KVM: x86: Add a capability for GUEST_MAXPHYADDR < HOST_MAXPHYADDR support
  KVM: VMX: optimize #PF injection when MAXPHYADDR does not match
  KVM: VMX: Add guest physical address check in EPT violation and misconfig
  KVM: VMX: introduce vmx_need_pf_intercept
  KVM: x86: update exception bitmap on CPUID changes
  KVM: x86: rename update_bp_intercept to update_exception_bitmap
  ...
2020-08-06 12:59:31 -07:00
Linus Torvalds 47ec5303d7 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from David Miller:

 1) Support 6Ghz band in ath11k driver, from Rajkumar Manoharan.

 2) Support UDP segmentation in code TSO code, from Eric Dumazet.

 3) Allow flashing different flash images in cxgb4 driver, from Vishal
    Kulkarni.

 4) Add drop frames counter and flow status to tc flower offloading,
    from Po Liu.

 5) Support n-tuple filters in cxgb4, from Vishal Kulkarni.

 6) Various new indirect call avoidance, from Eric Dumazet and Brian
    Vazquez.

 7) Fix BPF verifier failures on 32-bit pointer arithmetic, from
    Yonghong Song.

 8) Support querying and setting hardware address of a port function via
    devlink, use this in mlx5, from Parav Pandit.

 9) Support hw ipsec offload on bonding slaves, from Jarod Wilson.

10) Switch qca8k driver over to phylink, from Jonathan McDowell.

11) In bpftool, show list of processes holding BPF FD references to
    maps, programs, links, and btf objects. From Andrii Nakryiko.

12) Several conversions over to generic power management, from Vaibhav
    Gupta.

13) Add support for SO_KEEPALIVE et al. to bpf_setsockopt(), from Dmitry
    Yakunin.

14) Various https url conversions, from Alexander A. Klimov.

15) Timestamping and PHC support for mscc PHY driver, from Antoine
    Tenart.

16) Support bpf iterating over tcp and udp sockets, from Yonghong Song.

17) Support 5GBASE-T i40e NICs, from Aleksandr Loktionov.

18) Add kTLS RX HW offload support to mlx5e, from Tariq Toukan.

19) Fix the ->ndo_start_xmit() return type to be netdev_tx_t in several
    drivers. From Luc Van Oostenryck.

20) XDP support for xen-netfront, from Denis Kirjanov.

21) Support receive buffer autotuning in MPTCP, from Florian Westphal.

22) Support EF100 chip in sfc driver, from Edward Cree.

23) Add XDP support to mvpp2 driver, from Matteo Croce.

24) Support MPTCP in sock_diag, from Paolo Abeni.

25) Commonize UDP tunnel offloading code by creating udp_tunnel_nic
    infrastructure, from Jakub Kicinski.

26) Several pci_ --> dma_ API conversions, from Christophe JAILLET.

27) Add FLOW_ACTION_POLICE support to mlxsw, from Ido Schimmel.

28) Add SK_LOOKUP bpf program type, from Jakub Sitnicki.

29) Refactor a lot of networking socket option handling code in order to
    avoid set_fs() calls, from Christoph Hellwig.

30) Add rfc4884 support to icmp code, from Willem de Bruijn.

31) Support TBF offload in dpaa2-eth driver, from Ioana Ciornei.

32) Support XDP_REDIRECT in qede driver, from Alexander Lobakin.

33) Support PCI relaxed ordering in mlx5 driver, from Aya Levin.

34) Support TCP syncookies in MPTCP, from Flowian Westphal.

35) Fix several tricky cases of PMTU handling wrt. briding, from Stefano
    Brivio.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2056 commits)
  net: thunderx: initialize VF's mailbox mutex before first usage
  usb: hso: remove bogus check for EINPROGRESS
  usb: hso: no complaint about kmalloc failure
  hso: fix bailout in error case of probe
  ip_tunnel_core: Fix build for archs without _HAVE_ARCH_IPV6_CSUM
  selftests/net: relax cpu affinity requirement in msg_zerocopy test
  mptcp: be careful on subflow creation
  selftests: rtnetlink: make kci_test_encap() return sub-test result
  selftests: rtnetlink: correct the final return value for the test
  net: dsa: sja1105: use detected device id instead of DT one on mismatch
  tipc: set ub->ifindex for local ipv6 address
  ipv6: add ipv6_dev_find()
  net: openvswitch: silence suspicious RCU usage warning
  Revert "vxlan: fix tos value before xmit"
  ptp: only allow phase values lower than 1 period
  farsync: switch from 'pci_' to 'dma_' API
  wan: wanxl: switch from 'pci_' to 'dma_' API
  hv_netvsc: do not use VF device if link is down
  dpaa2-eth: Fix passing zero to 'PTR_ERR' warning
  net: macb: Properly handle phylink on at91sam9x
  ...
2020-08-05 20:13:21 -07:00
Linus Torvalds 1785d11612 Char/Misc driver patches for 5.9-rc1
Here is the large set of char and misc and other driver subsystem
 patches for 5.9-rc1.  Lots of new driver submissions in here, and
 cleanups and features for existing drivers.
 
 Highlights are:
 	- habanalabs driver updates
 	- coresight driver updates
 	- nvmem driver updates
 	- huge number of "W=1" build warning cleanups from Lee Jones
 	- dyndbg updates
 	- virtbox driver fixes and updates
 	- soundwire driver updates
 	- mei driver updates
 	- phy driver updates
 	- fpga driver updates
 	- lots of smaller individual misc/char driver cleanups and fixes
 
 Full details are in the shortlog.
 
 All of these have been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 
 iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCXylccQ8cZ3JlZ0Brcm9h
 aC5jb20ACgkQMUfUDdst+ymofgCfZ1CxNWd0ZVM0YIn8cY9gO6ON7MsAnRq48hvn
 Vjf4rKM73GC11bVF4Gyy
 =Xq1R
 -----END PGP SIGNATURE-----

Merge tag 'char-misc-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the large set of char and misc and other driver subsystem
  patches for 5.9-rc1. Lots of new driver submissions in here, and
  cleanups and features for existing drivers.

  Highlights are:
   - habanalabs driver updates
   - coresight driver updates
   - nvmem driver updates
   - huge number of "W=1" build warning cleanups from Lee Jones
   - dyndbg updates
   - virtbox driver fixes and updates
   - soundwire driver updates
   - mei driver updates
   - phy driver updates
   - fpga driver updates
   - lots of smaller individual misc/char driver cleanups and fixes

  Full details are in the shortlog.

  All of these have been in linux-next with no reported issues"

* tag 'char-misc-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (322 commits)
  habanalabs: remove unused but set variable 'ctx_asid'
  nvmem: qcom-spmi-sdam: Enable multiple devices
  dt-bindings: nvmem: SID: add binding for A100's SID controller
  nvmem: update Kconfig description
  nvmem: qfprom: Add fuse blowing support
  dt-bindings: nvmem: Add properties needed for blowing fuses
  dt-bindings: nvmem: qfprom: Convert to yaml
  nvmem: qfprom: use NVMEM_DEVID_AUTO for multiple instances
  nvmem: core: add support to auto devid
  nvmem: core: Add nvmem_cell_read_u8()
  nvmem: core: Grammar fixes for help text
  nvmem: sc27xx: add sc2730 efuse support
  nvmem: Enforce nvmem stride in the sysfs interface
  MAINTAINERS: Add git tree for NVMEM FRAMEWORK
  nvmem: sprd: Fix return value of sprd_efuse_probe()
  drivers: android: Fix the SPDX comment style
  drivers: android: Fix a variable declaration coding style issue
  drivers: android: Remove braces for a single statement if-else block
  drivers: android: Remove the use of else after return
  drivers: android: Fix a variable declaration coding style issue
  ...
2020-08-05 11:43:47 -07:00
Linus Torvalds 9ecc6ea491 seccomp updates for v5.9-rc1
- Improved selftest coverage, timeouts, and reporting
 - Add EPOLLHUP support for SECCOMP_RET_USER_NOTIF (Christian Brauner)
 - Refactor __scm_install_fd() into __receive_fd() and fix buggy callers
 - Introduce "addfd" command for SECCOMP_RET_USER_NOTIF (Sargun Dhillon)
 -----BEGIN PGP SIGNATURE-----
 
 iQJKBAABCgA0FiEEpcP2jyKd1g9yPm4TiXL039xtwCYFAl8oZcQWHGtlZXNjb29r
 QGNocm9taXVtLm9yZwAKCRCJcvTf3G3AJomDD/4x3j7eXREcXDsHOmlgEaHWGx4l
 JldHFQhV5GjmD7gOkPcoZSG7NfG7F6VpwAJg7ZoR3qUkem7K8DFucxqgo1RldCot
 nigleeLX6JeMS0Z+iwjAVZd+5t4xG4J/7GGDHIIMiG5qvwJ0Yf64o1bkjaB2Q/Bv
 tluBg0WF32kFMG/ZwyY/V2QDbbue97CFPflybOh1o2nWbVzmUlFEEum3UUvZsxc8
 smMsattJyuAV7kcEKzKrs8b010NdFZqwdbub5Np9W3XEXGBYMdIPoNsOQGmB9wby
 j2ui0lzboXRG997jM7TCd1l/XZAv8aAwvPplw3FJRybzkOGs9NDyLMoz87yJpR1T
 xp511vnMyMbyKIGdungkt7cIyzaictHwaYzznsmuNdCPEjTaIQJr1ctsa4GEgtqf
 pnkktZ9YbMCcHU0CtZ8GlOVqA9wE+FUm0/u0zgikzJQsB+HcNItiARTTTHRyco7p
 VJCqK8o4Zx4ELV7QNkSH4nhFkVgRopvrvBiPAGro/qwGOofBg8W8wM8O1+V/MDmp
 zSU22v4SncT1Xb7dtmdJqDEeHfDikhaCAb4Je2hsGQWzbdAqwHGlpa7vpk9x3Q5r
 L+XyP+Z+rPHlXYyypJwUvvOQhXOmP0zYxcEHxByqIBfXiwy+3dN4tDDfatWbccwl
 uTlTDM8kmQn6QzSztA==
 =yb55
 -----END PGP SIGNATURE-----

Merge tag 'seccomp-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull seccomp updates from Kees Cook:
 "There are a bunch of clean ups and selftest improvements along with
  two major updates to the SECCOMP_RET_USER_NOTIF filter return:
  EPOLLHUP support to more easily detect the death of a monitored
  process, and being able to inject fds when intercepting syscalls that
  expect an fd-opening side-effect (needed by both container folks and
  Chrome). The latter continued the refactoring of __scm_install_fd()
  started by Christoph, and in the process found and fixed a handful of
  bugs in various callers.

   - Improved selftest coverage, timeouts, and reporting

   - Add EPOLLHUP support for SECCOMP_RET_USER_NOTIF (Christian Brauner)

   - Refactor __scm_install_fd() into __receive_fd() and fix buggy
     callers

   - Introduce 'addfd' command for SECCOMP_RET_USER_NOTIF (Sargun
     Dhillon)"

* tag 'seccomp-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (30 commits)
  selftests/seccomp: Test SECCOMP_IOCTL_NOTIF_ADDFD
  seccomp: Introduce addfd ioctl to seccomp user notifier
  fs: Expand __receive_fd() to accept existing fd
  pidfd: Replace open-coded receive_fd()
  fs: Add receive_fd() wrapper for __receive_fd()
  fs: Move __scm_install_fd() to __receive_fd()
  net/scm: Regularize compat handling of scm_detach_fds()
  pidfd: Add missing sock updates for pidfd_getfd()
  net/compat: Add missing sock updates for SCM_RIGHTS
  selftests/seccomp: Check ENOSYS under tracing
  selftests/seccomp: Refactor to use fixture variants
  selftests/harness: Clean up kern-doc for fixtures
  seccomp: Use -1 marker for end of mode 1 syscall list
  seccomp: Fix ioctl number for SECCOMP_IOCTL_NOTIF_ID_VALID
  selftests/seccomp: Rename user_trap_syscall() to user_notif_syscall()
  selftests/seccomp: Make kcmp() less required
  seccomp: Use pr_fmt
  selftests/seccomp: Improve calibration loop
  selftests/seccomp: use 90s as timeout
  selftests/seccomp: Expand benchmark to per-filter measurements
  ...
2020-08-04 14:11:08 -07:00
Stafford Horne c1d55d5013 asm-generic/io.h: Fix sparse warnings on big-endian architectures
On big-endian architectures like OpenRISC, sparse outputs below warnings on
asm-generic/io.h.  This is due to io statements like:

  __raw_writel(cpu_to_le32(value), PCI_IOBASE + addr);

The __raw_writel() function expects native endianness, however
cpu_to_le32() returns __le32.  On little-endian machines these match up
and there is no issue.  However, on big-endian we get warnings, for IO
that is defined as little-endian the mismatch is expected.

The fix I propose is to __force to native endian.

Warnings:

./include/asm-generic/io.h:166:15: warning: cast to restricted __le16
./include/asm-generic/io.h:166:15: warning: cast to restricted __le16
./include/asm-generic/io.h:166:15: warning: cast to restricted __le16
./include/asm-generic/io.h:166:15: warning: cast to restricted __le16
./include/asm-generic/io.h:179:15: warning: cast to restricted __le32
./include/asm-generic/io.h:179:15: warning: cast to restricted __le32
./include/asm-generic/io.h:179:15: warning: cast to restricted __le32
./include/asm-generic/io.h:179:15: warning: cast to restricted __le32
./include/asm-generic/io.h:179:15: warning: cast to restricted __le32
./include/asm-generic/io.h:179:15: warning: cast to restricted __le32
./include/asm-generic/io.h:215:22: warning: incorrect type in argument 1 (different base types)
./include/asm-generic/io.h:215:22:    expected unsigned short [usertype] value
./include/asm-generic/io.h:215:22:    got restricted __le16 [usertype]
./include/asm-generic/io.h:225:22: warning: incorrect type in argument 1 (different base types)
./include/asm-generic/io.h:225:22:    expected unsigned int [usertype] value
./include/asm-generic/io.h:225:22:    got restricted __le32 [usertype]

Signed-off-by: Stafford Horne <shorne@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2020-08-04 12:52:23 +09:00
Linus Torvalds e4cbce4d13 The main changes in this cycle were:
- Improve uclamp performance by using a static key for the fast path
 
  - Add the "sched_util_clamp_min_rt_default" sysctl, to optimize for
    better power efficiency of RT tasks on battery powered devices.
    (The default is to maximize performance & reduce RT latencies.)
 
  - Improve utime and stime tracking accuracy, which had a fixed boundary
    of error, which created larger and larger relative errors as the values
    become larger. This is now replaced with more precise arithmetics,
    using the new mul_u64_u64_div_u64() helper in math64.h.
 
  - Improve the deadline scheduler, such as making it capacity aware
 
  - Improve frequency-invariant scheduling
 
  - Misc cleanups in energy/power aware scheduling
 
  - Add sched_update_nr_running tracepoint to track changes to nr_running
 
  - Documentation additions and updates
 
  - Misc cleanups and smaller fixes
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAl8oJDURHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1ixLg//bqWzFlfWirvngTgDxDnplwUTyKXmMCcq
 R1IYhlyK2O5FxvhbRmdmW11W3yzyTPvgCs6Q/70negGaPNe2w1OxfxiK9NMKz5eu
 M1LoXas7pL5g7Pr/ZxxHk/8VqJLV4t9MkodiiInmV6lTaznT3sU6a/kpYQjJyFnG
 Tuu9jd6JhdRKmePDJnNmUBoGQ7JiOQDcX4HtkcQ3OA+An3624tmJzbW1yts+uj7J
 ZWo2EY60RfbA9MxQXGPOaR/nAjngWs4Q6tddAh10mftsPq1gR2iFUKju1d31MQt/
 RHLdiqJf+AyUC4popKG7a+7ilCKMBwPociSreTJNPyEUQ1X4AM3vUVk4yjUoiDph
 k2WdsCF8/JRdhXg0NnrpPUqOaAbQj53EeXnitEb92E7WyTZgLOvAtpV//xZo6utp
 2QHerfrQ9SoGQjz/ho78za5vQtV1x25yDhd+X4XV4QEhIy85G9/2JCpC/Kc/TXLf
 OO7A4X69XztKTEJhP60g8ldCPUe4N2vbh1vKY6oAD8AFQVVNZ6n7375/Qa//b0/k
 ++hcYkPc2EK97/aBFdvzDgqb7aUo7Mtn2ibke16sQU4szulaoRuAHQG4jdGKMwbD
 dk2VBoxyxeYFXWHsNneSe87+ha3sd0dSN0ul1EB/SlFrVELMvy634YXnMYGW8ima
 PzyPB0ezpuA=
 =PbO7
 -----END PGP SIGNATURE-----

Merge tag 'sched-core-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler updates from Ingo Molnar:

 - Improve uclamp performance by using a static key for the fast path

 - Add the "sched_util_clamp_min_rt_default" sysctl, to optimize for
   better power efficiency of RT tasks on battery powered devices.
   (The default is to maximize performance & reduce RT latencies.)

 - Improve utime and stime tracking accuracy, which had a fixed boundary
   of error, which created larger and larger relative errors as the
   values become larger. This is now replaced with more precise
   arithmetics, using the new mul_u64_u64_div_u64() helper in math64.h.

 - Improve the deadline scheduler, such as making it capacity aware

 - Improve frequency-invariant scheduling

 - Misc cleanups in energy/power aware scheduling

 - Add sched_update_nr_running tracepoint to track changes to nr_running

 - Documentation additions and updates

 - Misc cleanups and smaller fixes

* tag 'sched-core-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (54 commits)
  sched/doc: Factorize bits between sched-energy.rst & sched-capacity.rst
  sched/doc: Document capacity aware scheduling
  sched: Document arch_scale_*_capacity()
  arm, arm64: Fix selection of CONFIG_SCHED_THERMAL_PRESSURE
  Documentation/sysctl: Document uclamp sysctl knobs
  sched/uclamp: Add a new sysctl to control RT default boost value
  sched/uclamp: Fix a deadlock when enabling uclamp static key
  sched: Remove duplicated tick_nohz_full_enabled() check
  sched: Fix a typo in a comment
  sched/uclamp: Remove unnecessary mutex_init()
  arm, arm64: Select CONFIG_SCHED_THERMAL_PRESSURE
  sched: Cleanup SCHED_THERMAL_PRESSURE kconfig entry
  arch_topology, sched/core: Cleanup thermal pressure definition
  trace/events/sched.h: fix duplicated word
  linux/sched/mm.h: drop duplicated words in comments
  smp: Fix a potential usage of stale nr_cpus
  sched/fair: update_pick_idlest() Select group with lowest group_util when idle_cpus are equal
  sched: nohz: stop passing around unused "ticks" parameter.
  sched: Better document ttwu()
  sched: Add a tracepoint to track rq->nr_running
  ...
2020-08-03 14:58:38 -07:00
Linus Torvalds 9ba19ccd2d These were the main changes in this cycle:
- LKMM updates: mostly documentation changes, but also some new litmus tests for atomic ops.
 
  - KCSAN updates: the most important change is that GCC 11 now has all fixes in place
                   to support KCSAN, so GCC support can be enabled again. Also more annotations.
 
  - futex updates: minor cleanups and simplifications
 
  - seqlock updates: merge preparatory changes/cleanups for the 'associated locks' facilities.
 
  - lockdep updates:
     - simplify IRQ trace event handling
     - add various new debug checks
     - simplify header dependencies, split out <linux/lockdep_types.h>, decouple
       lockdep from other low level headers some more
     - fix NMI handling
 
  - misc cleanups and smaller fixes
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAl8n9/wRHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1hZFQ//dD+AKw9Nym+WbylovmeD0qxWxPyeN/jG
 vBVDTOJIJLtZTkZf6YHcYOJlPwaMDYUQluqTPQhsaQZy/NoEb5NM2cFAj2R9gjyT
 O8665T1dvhW9Sh353mBpuwviqdrnvCeHTBEcglSlFY7hxToYAflUN0+DXGVtNys8
 PFNf3L9SHT0GLVC8+di/eJzQaRqxiB0Pq7kvh2RvPJM/dcQNA9Ho3CCNO5j6qGoY
 u7OnMT8xJXkgbdjjUO4RO0v9VjMuNthZ2JiONDgvgKtJfIL2wt5YXIv1EYX0GuWp
 WZgIzE4o1G7GJOOzKpFfZFyK8grHu2fWgK1plvodWjlLkBmltJZ1qyOM+wngd/m2
 TgtPo73/YFbxFUbbBpkb0eiIaH2t99kMvfCWd05+GiPCtzn9UL9GfFRWd42vonwc
 sQWjFrHKlnuzifUfNcLmKg7R2nUtF3Dm/SydiTJ+9NtH/QA17YJKWnlE1moulNtQ
 p7H7+8UdcvSQ7F38A74v2IYNIyDsv5qcE8ar4QHdaanBBX/LCyD0UlfgsgxEReXf
 GDKkpx7LFQlI6Y2YB+dZgkCwhNBl3/OQ3v6hC95B37fA67dAIQyPIWHiHbaM+029
 gghqU4GcUcbjSnHPzl9PPL+hi9MyXrMjpb7CBXytg4NI4EE1waHR+0kX14V8ndRj
 MkWQOKPUgB0=
 =3MTT
 -----END PGP SIGNATURE-----

Merge tag 'locking-core-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Ingo Molnar:

 - LKMM updates: mostly documentation changes, but also some new litmus
   tests for atomic ops.

 - KCSAN updates: the most important change is that GCC 11 now has all
   fixes in place to support KCSAN, so GCC support can be enabled again.
   Also more annotations.

 - futex updates: minor cleanups and simplifications

 - seqlock updates: merge preparatory changes/cleanups for the
   'associated locks' facilities.

 - lockdep updates:
    - simplify IRQ trace event handling
    - add various new debug checks
    - simplify header dependencies, split out <linux/lockdep_types.h>,
      decouple lockdep from other low level headers some more
    - fix NMI handling

 - misc cleanups and smaller fixes

* tag 'locking-core-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (60 commits)
  kcsan: Improve IRQ state trace reporting
  lockdep: Refactor IRQ trace events fields into struct
  seqlock: lockdep assert non-preemptibility on seqcount_t write
  lockdep: Add preemption enabled/disabled assertion APIs
  seqlock: Implement raw_seqcount_begin() in terms of raw_read_seqcount()
  seqlock: Add kernel-doc for seqcount_t and seqlock_t APIs
  seqlock: Reorder seqcount_t and seqlock_t API definitions
  seqlock: seqcount_t latch: End read sections with read_seqcount_retry()
  seqlock: Properly format kernel-doc code samples
  Documentation: locking: Describe seqlock design and usage
  locking/qspinlock: Do not include atomic.h from qspinlock_types.h
  locking/atomic: Move ATOMIC_INIT into linux/types.h
  lockdep: Move list.h inclusion into lockdep.h
  locking/lockdep: Fix TRACE_IRQFLAGS vs. NMIs
  futex: Remove unused or redundant includes
  futex: Consistently use fshared as boolean
  futex: Remove needless goto's
  futex: Remove put_futex_key()
  rwsem: fix commas in initialisation
  docs: locking: Replace HTTP links with HTTPS ones
  ...
2020-08-03 14:39:35 -07:00
Linus Torvalds 5ece08178d A single commit that separates out the instrumentation_begin()/end() bits from compiler.h.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAl8n8LQRHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1hvyA//akThywKHuyy9XDnHv4Llo6SgYmbxByX/
 krBPttId3feRwwiw4v+pbE9USQ4JAJUA0inciSJqO9xHFuz43h/QYQwdwShgGghS
 BvYVxYhLXVojIgxItZQ0XtxuRu2dpR1Rg4m1K6GXuAfdOiV+2C9fubIyDfSPa6n6
 82Sk/RgjXCklw6KB3evq5eRXPHHP4oSnvMRDD+SgPumDnsfwgcULvgHbLmr5yTHR
 0Zp1r4bkt0RsSpccyCTS48Kx4SuFZa8m6lsQLzEJw7y7ctukYiC7nP2uo+uZfGHg
 FwcRI2u0tWCQR4stc4upgBlB4cs84NlUXVHyy3zJeWcaBmHP5w4NkiEode+mtJIs
 Y/tovbcpCyHBFAnjeCD19GWZlx8pVtixusghcV2tchD+l/28stktIJZ2hgK59YYI
 TRd0F7SYhU0wQw8V3XdzjbKG6tXHKVNx7Y0Dj/arnHldN+WaD3ENpuPbpobDAtNg
 2EqbsUqDk4acoh8nBh7A0AJdm+C+ddLQqMo0kz9JvN3LXGQX/3Nvs2BuWB4TAlgm
 EIPaSa7c54TAletjwAGD39Si1TU26dSs5Jeaf84u2hsvBRM044mQNS9HzwLijysj
 ilW3N5zm4uAF1QOsWUvMUM65y1qFewibkt4v7yysmEJAaZWpWfkK7U57dTx3qTIj
 AQ1rsZxBg3s=
 =Lzcg
 -----END PGP SIGNATURE-----

Merge tag 'core-headers-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull header cleanup from Ingo Molnar:
 "Separate out the instrumentation_begin()/end() bits from compiler.h"

* tag 'core-headers-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  compiler.h: Move instrumentation_begin()/end() to new <linux/instrumentation.h> header
2020-08-03 14:25:40 -07:00
Linus Torvalds 145ff1ec09 arm64 and cross-arch updates for 5.9:
- Removal of the tremendously unpopular read_barrier_depends() barrier,
   which is a NOP on all architectures apart from Alpha, in favour of
   allowing architectures to override READ_ONCE() and do whatever dance
   they need to do to ensure address dependencies provide LOAD ->
   LOAD/STORE ordering. This work also offers a potential solution if
   compilers are shown to convert LOAD -> LOAD address dependencies into
   control dependencies (e.g. under LTO), as weakly ordered architectures
   will effectively be able to upgrade READ_ONCE() to smp_load_acquire().
   The latter case is not used yet, but will be discussed further at LPC.
 
 - Make the MSI/IOMMU input/output ID translation PCI agnostic, augment
   the MSI/IOMMU ACPI/OF ID mapping APIs to accept an input ID
   bus-specific parameter and apply the resulting changes to the device
   ID space provided by the Freescale FSL bus.
 
 - arm64 support for TLBI range operations and translation table level
   hints (part of the ARMv8.4 architecture version).
 
 - Time namespace support for arm64.
 
 - Export the virtual and physical address sizes in vmcoreinfo for
   makedumpfile and crash utilities.
 
 - CPU feature handling cleanups and checks for programmer errors
   (overlapping bit-fields).
 
 - ACPI updates for arm64: disallow AML accesses to EFI code regions and
   kernel memory.
 
 - perf updates for arm64.
 
 - Miscellaneous fixes and cleanups, most notably PLT counting
   optimisation for module loading, recordmcount fix to ignore
   relocations other than R_AARCH64_CALL26, CMA areas reserved for
   gigantic pages on 16K and 64K configurations.
 
 - Trivial typos, duplicate words.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEE5RElWfyWxS+3PLO2a9axLQDIXvEFAl8oTcsACgkQa9axLQDI
 XvEj6hAAkn39mO5xrR/Vhpg3DyFPk63ZlMSX9SsOeVyaLbovT6stTs1XAZXPpnkt
 rV3gwACyGSrqH6+uey9pHgHJuPF2TdrGEVK08yVKo9KGW/6yXSIncdKFE4jUJ/WJ
 wF5j7eMET2aGzcpm5AlzMmq6HOrKB8nZac9H8/x6H+Ox2WdgJkEjOkDvyqACUyum
 N3FsTZkWj2pIkTXHNgDZ8KjxVLO8HlFaB2hkxFDl9NPlX2UTCQJ8Tg1KiPLafKaK
 gUvH4usQDFdb5RU/UWogre37J4emO0ZTApZOyju+U+PMMWlWVHjZ4isUIS9zz/AE
 JNZ23dnKZX2HrYa5p8HZx175zwj/vXUqUHCZPLvQXaAudCEhF8BVljPiG0e80FV5
 GHFUgUbylKspp01I/9L+2JvsG96Mr0e+P3Sx7L2HTI42cmtoSa14+MpoSRj7zlft
 Qcl8hfrVOjCjUnFRHa/1y1cGvnD9GbgnKJR7zgVxl9bD/Jd48r1HUtwRORZCzWFr
 mRPVbPS72fWxMzMV9DZYJm02jJY9kLX2BMl49njbB8MhAhzOvrMVzoVVtMMeRFLR
 XHeJpmg36W09FiRGe7LRXlkXIhCQzQG2bJfiphuupCfhjRAitPoq8I925G6Pig60
 c8RWaXGU7PrEsdMNrL83vekvGKgqrkoFkRVtsCoQ2X6Hvu/XdYI=
 =mh79
 -----END PGP SIGNATURE-----

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 and cross-arch updates from Catalin Marinas:
 "Here's a slightly wider-spread set of updates for 5.9.

  Going outside the usual arch/arm64/ area is the removal of
  read_barrier_depends() series from Will and the MSI/IOMMU ID
  translation series from Lorenzo.

  The notable arm64 updates include ARMv8.4 TLBI range operations and
  translation level hint, time namespace support, and perf.

  Summary:

   - Removal of the tremendously unpopular read_barrier_depends()
     barrier, which is a NOP on all architectures apart from Alpha, in
     favour of allowing architectures to override READ_ONCE() and do
     whatever dance they need to do to ensure address dependencies
     provide LOAD -> LOAD/STORE ordering.

     This work also offers a potential solution if compilers are shown
     to convert LOAD -> LOAD address dependencies into control
     dependencies (e.g. under LTO), as weakly ordered architectures will
     effectively be able to upgrade READ_ONCE() to smp_load_acquire().
     The latter case is not used yet, but will be discussed further at
     LPC.

   - Make the MSI/IOMMU input/output ID translation PCI agnostic,
     augment the MSI/IOMMU ACPI/OF ID mapping APIs to accept an input ID
     bus-specific parameter and apply the resulting changes to the
     device ID space provided by the Freescale FSL bus.

   - arm64 support for TLBI range operations and translation table level
     hints (part of the ARMv8.4 architecture version).

   - Time namespace support for arm64.

   - Export the virtual and physical address sizes in vmcoreinfo for
     makedumpfile and crash utilities.

   - CPU feature handling cleanups and checks for programmer errors
     (overlapping bit-fields).

   - ACPI updates for arm64: disallow AML accesses to EFI code regions
     and kernel memory.

   - perf updates for arm64.

   - Miscellaneous fixes and cleanups, most notably PLT counting
     optimisation for module loading, recordmcount fix to ignore
     relocations other than R_AARCH64_CALL26, CMA areas reserved for
     gigantic pages on 16K and 64K configurations.

   - Trivial typos, duplicate words"

Link: http://lkml.kernel.org/r/20200710165203.31284-1-will@kernel.org
Link: http://lkml.kernel.org/r/20200619082013.13661-1-lorenzo.pieralisi@arm.com

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (82 commits)
  arm64: use IRQ_STACK_SIZE instead of THREAD_SIZE for irq stack
  arm64/mm: save memory access in check_and_switch_context() fast switch path
  arm64: sigcontext.h: delete duplicated word
  arm64: ptrace.h: delete duplicated word
  arm64: pgtable-hwdef.h: delete duplicated words
  bus: fsl-mc: Add ACPI support for fsl-mc
  bus/fsl-mc: Refactor the MSI domain creation in the DPRC driver
  of/irq: Make of_msi_map_rid() PCI bus agnostic
  of/irq: make of_msi_map_get_device_domain() bus agnostic
  dt-bindings: arm: fsl: Add msi-map device-tree binding for fsl-mc bus
  of/device: Add input id to of_dma_configure()
  of/iommu: Make of_map_rid() PCI agnostic
  ACPI/IORT: Add an input ID to acpi_dma_configure()
  ACPI/IORT: Remove useless PCI bus walk
  ACPI/IORT: Make iort_msi_map_rid() PCI agnostic
  ACPI/IORT: Make iort_get_device_domain IRQ domain agnostic
  ACPI/IORT: Make iort_match_node_callback walk the ACPI namespace for NC
  arm64: enable time namespace support
  arm64/vdso: Restrict splitting VVAR VMA
  arm64/vdso: Handle faults on timens page
  ...
2020-08-03 14:11:08 -07:00
David S. Miller bd0b33b248 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Resolved kernel/bpf/btf.c using instructions from merge commit
69138b34a7

Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-02 01:02:12 -07:00
Catalin Marinas 0e4cd9f265 Merge branch 'for-next/read-barrier-depends' into for-next/core
* for-next/read-barrier-depends:
  : Allow architectures to override __READ_ONCE()
  arm64: Reduce the number of header files pulled into vmlinux.lds.S
  compiler.h: Move compiletime_assert() macros into compiler_types.h
  checkpatch: Remove checks relating to [smp_]read_barrier_depends()
  include/linux: Remove smp_read_barrier_depends() from comments
  tools/memory-model: Remove smp_read_barrier_depends() from informal doc
  Documentation/barriers/kokr: Remove references to [smp_]read_barrier_depends()
  Documentation/barriers: Remove references to [smp_]read_barrier_depends()
  locking/barriers: Remove definitions for [smp_]read_barrier_depends()
  alpha: Replace smp_read_barrier_depends() usage with smp_[r]mb()
  vhost: Remove redundant use of read_barrier_depends() barrier
  asm/rwonce: Don't pull <asm/barrier.h> into 'asm-generic/rwonce.h'
  asm/rwonce: Remove smp_read_barrier_depends() invocation
  alpha: Override READ_ONCE() with barriered implementation
  asm/rwonce: Allow __READ_ONCE to be overridden by the architecture
  compiler.h: Split {READ,WRITE}_ONCE definitions out into rwonce.h
  tools: bpf: Use local copy of headers including uapi/linux/filter.h
2020-07-31 18:09:57 +01:00
Ingo Molnar 28cff52eae Merge branch 'linus' into locking/core, to resolve conflict
Conflicts:
	arch/arm/include/asm/percpu.h

As Stephen Rothwell noted, there's a conflict between this commit
in locking/core:

  a21ee6055c ("lockdep: Change hardirq{s_enabled,_context} to per-cpu variables")

and this fresh upstream commit:

  aa54ea903a ("ARM: percpu.h: fix build error")

a21ee6055c is a simpler solution to the dependency problem and doesn't
further increase header hell - so this conflict resolution effectively
reverts aa54ea903a and uses the a21ee6055c solution.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-07-31 12:16:09 +02:00
Peter Zijlstra f05d67179d Merge branch 'locking/header' 2020-07-29 16:14:21 +02:00
Herbert Xu 459e39538e locking/qspinlock: Do not include atomic.h from qspinlock_types.h
This patch breaks a header loop involving qspinlock_types.h.
The issue is that qspinlock_types.h includes atomic.h, which then
eventually includes kernel.h which could lead back to the original
file via spinlock_types.h.

As ATOMIC_INIT is now defined by linux/types.h, there is no longer
any need to include atomic.h from qspinlock_types.h.  This also
allows the CONFIG_PARAVIRT hack to be removed since it was trying
to prevent exactly this loop.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Link: https://lkml.kernel.org/r/20200729123316.GC7047@gondor.apana.org.au
2020-07-29 16:14:19 +02:00
Herbert Xu 7ca8cf5347 locking/atomic: Move ATOMIC_INIT into linux/types.h
This patch moves ATOMIC_INIT from asm/atomic.h into linux/types.h.
This allows users of atomic_t to use ATOMIC_INIT without having to
include atomic.h as that way may lead to header loops.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Link: https://lkml.kernel.org/r/20200729123105.GB7047@gondor.apana.org.au
2020-07-29 16:14:18 +02:00
Linus Torvalds 6ba1b005ff asm-generic: bugfix for v5.8
This is a single bugfix for a regression introduced through a
 typo in the v5.8 merge window, leading to incorrect data
 returned from inl() on some architectures.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEo6/YBQwIrVS28WGKmmx57+YAGNkFAl8gGBEACgkQmmx57+YA
 GNldaQ//efCqrYB0DYmj0NVuSWnO5ol84agWMjGM6lfBPRetxpVfprM1u8Auwe8Q
 GAGsEFn3thMj4DTIWaBGc4iCbXikjWTKQUzzsz1U05+JVf+lXVwmWTWpfZ1wAdnl
 UNjeP9m0pvCgbCmfmPo3vjwc6UYlHDcBIXxzagpLEjPqtvQL/SpEgT3GJGoThrqR
 bH/l2vJ+ajsw/cIaVd6xwLdasaPBqvl1gelUnkeMvPJddb9K7DKeNbU0N+yz4m5b
 9+rb5o3rXdIIEfS1njqCZoHEs7vEoRvGrSggEDXJyHjD/wd2+1C6sEyF7vOJBrmC
 gVcFuu3vNLtrHPUo+vI16ZWcS6rpxRJ+5QC7/Lyj3aC8QtbYoGUoHzNLPPYBraUH
 tqB/gBqOrh8FDcRs1WqrvXaflhVxWnU9119c98faLI6W1ZthU2/9XH1ZUfF3LjEp
 7O3kqrgbzpZp/QrbvPI4hG3xCMh+1whkh4aTw7cCVxu1io/eGjG2bjA2Yutnib3c
 0EdBZ58W4bjxO4Os3UB9zlrg4B1wGDZWwu4F5vcJfnU8ghHpcOlSmwutzGVuFQLZ
 tJlZLJysFilVxdnkiAIuJzh7uj8AjGWeHvUwwn+X/UQ19p5FwhqHDDIjOJtJuak6
 +idjl37eRPzY6/IDoUUZwURpUxFA57nx8AvvBGmjgZ4vswsfF6c=
 =XnT4
 -----END PGP SIGNATURE-----

Merge tag 'asm-generic-fixes-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic into master

Pull asm-generic bugfix from Arnd Bergmann:
 "A single bugfix for a regression introduced through a typo in the v5.8
  merge window, leading to incorrect data returned from inl() on some
  architectures"

* tag 'asm-generic-fixes-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  io: Fix return type of _inb and _inl
2020-07-28 11:55:53 -07:00
Greg Kroah-Hartman 65a9bde6ed Linux 5.8-rc7
-----BEGIN PGP SIGNATURE-----
 
 iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAl8d8h4eHHRvcnZhbGRz
 QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGd0sH/2iktYhMwPxzzpnb
 eI3OuTX/mRn4vUFOfpx9dmGVleMfKkpbvnn3IY7wA62Qfv7J7lkFRa1Bd1DlqXfW
 yyGTGDSKG5chiRCOU3s9ni92M4xIzFlrojyt/dIK2lUGMzUPI9FGlZRGQLKqqwLh
 2syOXRWbcQ7e52IHtDSy3YBNveKRsP4NyqV+GxGiex18SMB/M3Pw9EMH614eDPsE
 QAGQi5uGv4hPJtFHgXgUyBPLFHIyFAiVxhFRIj7u2DSEKY79+wO1CGWFiFvdTY4B
 CbqKXLffY3iQdFsLJkj9Dl8cnOQnoY44V0EBzhhORxeOp71StUVaRwQMFa5tp48G
 171s5Hs=
 =BQIl
 -----END PGP SIGNATURE-----

Merge 5.8-rc7 into char-misc-next

This should resolve the merge/build issues reported when trying to
create linux-next.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-27 11:49:37 +02:00
Stafford Horne 214ba3584b io: Fix return type of _inb and _inl
The return type of functions _inb, _inw and _inl are all u16 which looks
wrong.  This patch makes them u8, u16 and u32 respectively.

The original commit text for these does not indicate that these should
be all forced to u16.

Fixes: f009c89df7 ("io: Provide _inX() and _outX()")
Signed-off-by: Stafford Horne <shorne@gmail.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2020-07-27 10:32:29 +02:00
Nicholas Piggin 20c0e8269e powerpc/pseries: Implement paravirt qspinlocks for SPLPAR
This implements the generic paravirt qspinlocks using H_PROD and
H_CONFER to kick and wait.

This uses an un-directed yield to any CPU rather than the directed
yield to a pre-empted lock holder that paravirtualised simple
spinlocks use, that requires no kick hcall. This is something that
could be investigated and improved in future.

Performance results can be found in the commit which added queued
spinlocks.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200724131423.1362108-5-npiggin@gmail.com
2020-07-27 00:01:29 +10:00
Nicholas Piggin aa65ff6b18 powerpc/64s: Implement queued spinlocks and rwlocks
These have shown significantly improved performance and fairness when
spinlock contention is moderate to high on very large systems.

With this series including subsequent patches, on a 16 socket 1536
thread POWER9, a stress test such as same-file open/close from all
CPUs gets big speedups, 11620op/s aggregate with simple spinlocks vs
384158op/s (33x faster), where the difference in throughput between
the fastest and slowest thread goes from 7x to 1.4x.

Thanks to the fast path being identical in terms of atomics and
barriers (after a subsequent optimisation patch), single threaded
performance is not changed (no measurable difference).

On smaller systems, performance and fairness seems to be generally
improved. Using dbench on tmpfs as a test (that starts to run into
kernel spinlock contention), a 2-socket OpenPOWER POWER9 system was
tested with bare metal and KVM guest configurations. Results can be
found here:

https://github.com/linuxppc/issues/issues/305#issuecomment-663487453

Observations are:

- Queued spinlocks are equal when contention is insignificant, as
  expected and as measured with microbenchmarks.

- When there is contention, on bare metal queued spinlocks have better
  throughput and max latency at all points.

- When virtualised, queued spinlocks are slightly worse approaching
  peak throughput, but significantly better throughput and max latency
  at all points beyond peak, until queued spinlock maximum latency
  rises when clients are 2x vCPUs.

The regressions haven't been analysed very well yet, there are a lot
of things that can be tuned, particularly the paravirtualised locking,
but the numbers already look like a good net win even on relatively
small systems.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200724131423.1362108-4-npiggin@gmail.com
2020-07-27 00:01:23 +10:00
David S. Miller a57066b1a0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
The UDP reuseport conflict was a little bit tricky.

The net-next code, via bpf-next, extracted the reuseport handling
into a helper so that the BPF sk lookup code could invoke it.

At the same time, the logic for reuseport handling of unconnected
sockets changed via commit efc6b6f6c3
which changed the logic to carry on the reuseport result into the
rest of the lookup loop if we do not return immediately.

This requires moving the reuseport_has_conns() logic into the callers.

While we are here, get rid of inline directives as they do not belong
in foo.c files.

The other changes were cases of more straightforward overlapping
modifications.

Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-25 17:49:04 -07:00
Jim Cromie e5ebffe18e dyndbg: rename __verbose section to __dyndbg
dyndbg populates its callsite info into __verbose section, change that
to a more specific and descriptive name, __dyndbg.

Also, per checkpatch:
  simplify __attribute(..) to __section(__dyndbg) declaration.

and 1 spelling fix, decriptor

Acked-by: <jbaron@akamai.com>
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Link: https://lore.kernel.org/r/20200719231058.1586423-6-jim.cromie@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-24 17:00:08 +02:00
Ingo Molnar d19e789f06 compiler.h: Move instrumentation_begin()/end() to new <linux/instrumentation.h> header
Linus pointed out that compiler.h - which is a key header that gets included in every
single one of the 28,000+ kernel files during a kernel build - was bloated in:

  655389666643: ("vmlinux.lds.h: Create section for protection against instrumentation")

Linus noted:

 > I have pulled this, but do we really want to add this to a header file
 > that is _so_ core that it gets included for basically every single
 > file built?
 >
 > I don't even see those instrumentation_begin/end() things used
 > anywhere right now.
 >
 > It seems excessive. That 53 lines is maybe not a lot, but it pushed
 > that header file to over 12kB, and while it's mostly comments, it's
 > extra IO and parsing basically for _every_ single file compiled in the
 > kernel.
 >
 > For what appears to be absolutely zero upside right now, and I really
 > don't see why this should be in such a core header file!

Move these primitives into a new header: <linux/instrumentation.h>, and include that
header in the headers that make use of it.

Unfortunately one of these headers is asm-generic/bug.h, which does get included
in a lot of places, similarly to compiler.h. So the de-bloating effect isn't as
good as we'd like it to be - but at least the interfaces are defined separately.

No change to functionality intended.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200604071921.GA1361070@gmail.com
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
2020-07-24 13:56:23 +02:00
Peter Zijlstra 015dc08918 Merge branch 'sched/urgent' 2020-07-22 10:22:02 +02:00
Joerg Roedel de2b41be8f x86, vmlinux.lds: Page-align end of ..page_aligned sections
On x86-32 the idt_table with 256 entries needs only 2048 bytes. It is
page-aligned, but the end of the .bss..page_aligned section is not
guaranteed to be page-aligned.

As a result, objects from other .bss sections may end up on the same 4k
page as the idt_table, and will accidentially get mapped read-only during
boot, causing unexpected page-faults when the kernel writes to them.

This could be worked around by making the objects in the page aligned
sections page sized, but that's wrong.

Explicit sections which store only page aligned objects have an implicit
guarantee that the object is alone in the page in which it is placed. That
works for all objects except the last one. That's inconsistent.

Enforcing page sized objects for these sections would wreckage memory
sanitizers, because the object becomes artificially larger than it should
be and out of bound access becomes legit.

Align the end of the .bss..page_aligned and .data..page_aligned section on
page-size so all objects places in these sections are guaranteed to have
their own page.

[ tglx: Amended changelog ]

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20200721093448.10417-1-joro@8bytes.org
2020-07-22 09:38:37 +02:00
Will Deacon 93fab07c22 locking/barriers: Remove definitions for [smp_]read_barrier_depends()
There are no remaining users of [smp_]read_barrier_depends(), so
remove it from the generic implementation of 'barrier.h'.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
2020-07-21 10:50:36 +01:00
Will Deacon 002dff36ac asm/rwonce: Don't pull <asm/barrier.h> into 'asm-generic/rwonce.h'
Now that 'smp_read_barrier_depends()' has gone the way of the Norwegian
Blue, drop the inclusion of <asm/barrier.h> in 'asm-generic/rwonce.h'.

This requires fixups to some architecture vdso headers which were
previously relying on 'asm/barrier.h' coming in via 'linux/compiler.h'.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Will Deacon <will@kernel.org>
2020-07-21 10:50:36 +01:00
Will Deacon 3c9184109e asm/rwonce: Remove smp_read_barrier_depends() invocation
Alpha overrides __READ_ONCE() directly, so there's no need to use
smp_read_barrier_depends() in the core code. This also means that
__READ_ONCE() can be relied upon to provide dependency ordering.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
2020-07-21 10:50:35 +01:00
Will Deacon b78b331a3f asm/rwonce: Allow __READ_ONCE to be overridden by the architecture
The meat and potatoes of READ_ONCE() is defined by the __READ_ONCE()
macro, which uses a volatile casts in an attempt to avoid tearing of
byte, halfword, word and double-word accesses. Allow this to be
overridden by the architecture code in the case that things like memory
barriers are also required.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
2020-07-21 10:50:35 +01:00
Will Deacon e506ea4512 compiler.h: Split {READ,WRITE}_ONCE definitions out into rwonce.h
In preparation for allowing architectures to define their own
implementation of the READ_ONCE() macro, move the generic
{READ,WRITE}_ONCE() definitions out of the unwieldy 'linux/compiler.h'
file and into a new 'rwonce.h' header under 'asm-generic'.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
2020-07-21 10:50:35 +01:00
Christoph Hellwig f1bfd71c86 arch, net: remove the last csum_partial_copy() leftovers
Most of the tree only uses and implements csum_partial_copy_nocheck,
but the c6x and lib/checksum.c implement a csum_partial_copy that
isn't used anywere except to define csum_partial_copy.  Get rid of
this pointless alias.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-20 17:45:32 -07:00
Linus Torvalds a570f41989 arm64 fixes for -rc6
- Fix kernel text addresses for relocatable images booting using EFI
   and with KASLR disabled so that they match the vmlinux ELF binary.
 
 - Fix unloading and unbinding of PMU driver modules.
 
 - Fix generic mmiowb() when writeX() is called from preemptible context
   (reported by the riscv folks).
 
 - Fix ptrace hardware single-step interactions with signal handlers,
   system calls and reverse debugging.
 
 - Fix reporting of 64-bit x0 register for 32-bit tasks via 'perf_regs'.
 
 - Add comments describing syscall entry/exit tracing ABI.
 -----BEGIN PGP SIGNATURE-----
 
 iQFEBAABCgAuFiEEPxTL6PPUbjXGY88ct6xw3ITBYzQFAl8RgvsQHHdpbGxAa2Vy
 bmVsLm9yZwAKCRC3rHDchMFjNKNcB/9wsRJDxQDsCbV83xn5LrpR2qCs6G1UkVWT
 7peEQ21Brh60DamHlr9FdwPrIO/C62tQItU/hjCyk5oXZP3soW4J5vAXujP8wPrL
 bPe5933HuYkgRnnInCcrACmOnIacO9HGns8OoOKtSdZ6HCaKarL9V4hOfzWVSn7L
 RicX+xdn89lzZ+AD2MXYq1Q6mLcpKWx9wa0PSiYL+rGjsUqhwHvJcsYcSMp95/Ay
 ZSK27jmxjjTXNW56hE/svz4dzkBvL+8ezwodhjZtz2co8PdGhH2Azbq3QtHeICy+
 JB7lSx8A1sYIF3ASAhDYglCOCNlTb1dDN5LYfRwMWZ8cQfnRVdeV
 =o4Ve
 -----END PGP SIGNATURE-----

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux into master

Pull arm64 fixes from Will Deacon:
 "A batch of arm64 fixes.

  Although the diffstat is a bit larger than we'd usually have at this
  stage, a decent amount of it is the addition of comments describing
  our syscall tracing behaviour, and also a sweep across all the modular
  arm64 PMU drivers to make them rebust against unloading and unbinding.

  There are a couple of minor things kicking around at the moment (CPU
  errata and module PLTs for very large modules), but I'm not expecting
  any significant changes now for us in 5.8.

   - Fix kernel text addresses for relocatable images booting using EFI
     and with KASLR disabled so that they match the vmlinux ELF binary.

   - Fix unloading and unbinding of PMU driver modules.

   - Fix generic mmiowb() when writeX() is called from preemptible
     context (reported by the riscv folks).

   - Fix ptrace hardware single-step interactions with signal handlers,
     system calls and reverse debugging.

   - Fix reporting of 64-bit x0 register for 32-bit tasks via
     'perf_regs'.

   - Add comments describing syscall entry/exit tracing ABI"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  drivers/perf: Prevent forced unbinding of PMU drivers
  asm-generic/mmiowb: Allow mmiowb_set_pending() when preemptible()
  arm64: Use test_tsk_thread_flag() for checking TIF_SINGLESTEP
  arm64: ptrace: Use NO_SYSCALL instead of -1 in syscall_trace_enter()
  arm64: syscall: Expand the comment about ptrace and syscall(-1)
  arm64: ptrace: Add a comment describing our syscall entry/exit trap ABI
  arm64: compat: Ensure upper 32 bits of x0 are zero on syscall return
  arm64: ptrace: Override SPSR.SS when single-stepping is enabled
  arm64: ptrace: Consistently use pseudo-singlestep exceptions
  drivers/perf: Fix kernel panic when rmmod PMU modules during perf sampling
  efi/libstub/arm64: Retain 2MB kernel Image alignment if !KASLR
2020-07-17 15:27:52 -07:00
Will Deacon bd024e82e4 asm-generic/mmiowb: Allow mmiowb_set_pending() when preemptible()
Although mmiowb() is concerned only with serialising MMIO writes occuring
in contexts where a spinlock is held, the call to mmiowb_set_pending()
from the MMIO write accessors can occur in preemptible contexts, such
as during driver probe() functions where ordering between CPUs is not
usually a concern, assuming that the task migration path provides the
necessary ordering guarantees.

Unfortunately, the default implementation of mmiowb_set_pending() is not
preempt-safe, as it makes use of a a per-cpu variable to track its
internal state. This has been reported to generate the following splat
on riscv:

 | BUG: using smp_processor_id() in preemptible [00000000] code: swapper/0/1
 | caller is regmap_mmio_write32le+0x1c/0x46
 | CPU: 3 PID: 1 Comm: swapper/0 Not tainted 5.8.0-rc3-hfu+ #1
 | Call Trace:
 |  walk_stackframe+0x0/0x7a
 |  dump_stack+0x6e/0x88
 |  regmap_mmio_write32le+0x18/0x46
 |  check_preemption_disabled+0xa4/0xaa
 |  regmap_mmio_write32le+0x18/0x46
 |  regmap_mmio_write+0x26/0x44
 |  regmap_write+0x28/0x48
 |  sifive_gpio_probe+0xc0/0x1da

Although it's possible to fix the driver in this case, other splats have
been seen from other drivers, including the infamous 8250 UART, and so
it's better to address this problem in the mmiowb core itself.

Fix mmiowb_set_pending() by using the raw_cpu_ptr() to get at the mmiowb
state and then only updating the 'mmiowb_pending' field if we are not
preemptible (i.e. we have a non-zero nesting count).

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Guo Ren <guoren@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Reported-by: Palmer Dabbelt <palmer@dabbelt.com>
Reported-by: Emil Renner Berthing <kernel@esmil.dk>
Tested-by: Emil Renner Berthing <kernel@esmil.dk>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
Link: https://lore.kernel.org/r/20200716112816.7356-1-will@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2020-07-17 10:02:03 +01:00
Aneesh Kumar K.V 3e79f082eb libnvdimm/nvdimm/flush: Allow architecture to override the flush barrier
Architectures like ppc64 provide persistent memory specific barriers
that will ensure that all stores for which the modifications are
written to persistent storage by preceding dcbfps and dcbstps
instructions have updated persistent storage before any data
access or data transfer caused by subsequent instructions is initiated.
This is in addition to the ordering done by wmb()

Update nvdimm core such that architecture can use barriers other than
wmb to ensure all previous writes are architecturally visible for
the platform buffer flush.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200701072235.223558-5-aneesh.kumar@linux.ibm.com
2020-07-16 13:00:22 +10:00
David S. Miller 07dd1b7e68 Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Alexei Starovoitov says:

====================
pull-request: bpf-next 2020-07-13

The following pull-request contains BPF updates for your *net-next* tree.

We've added 36 non-merge commits during the last 7 day(s) which contain
a total of 62 files changed, 2242 insertions(+), 468 deletions(-).

The main changes are:

1) Avoid trace_printk warning banner by switching bpf_trace_printk to use
   its own tracing event, from Alan.

2) Better libbpf support on older kernels, from Andrii.

3) Additional AF_XDP stats, from Ciara.

4) build time resolution of BTF IDs, from Jiri.

5) BPF_CGROUP_INET_SOCK_RELEASE hook, from Stanislav.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-13 18:04:05 -07:00
Jiri Olsa 5a2798ab32 bpf: Add BTF_ID_LIST/BTF_ID/BTF_ID_UNUSED macros
Adding support to generate .BTF_ids section that will hold BTF
ID lists for verifier.

Adding macros that will help to define lists of BTF ID values
placed in .BTF_ids section. They are initially filled with zeros
(during compilation) and resolved later during the linking phase
by resolve_btfids tool.

Following defines list of one BTF ID value:

  BTF_ID_LIST(bpf_skb_output_btf_ids)
  BTF_ID(struct, sk_buff)

It also defines following variable to access the list:

  extern u32 bpf_skb_output_btf_ids[];

The BTF_ID_UNUSED macro defines 4 zero bytes. It's used when we
want to define 'unused' entry in BTF_ID_LIST, like:

  BTF_ID_LIST(bpf_skb_output_btf_ids)
  BTF_ID(struct, sk_buff)
  BTF_ID_UNUSED
  BTF_ID(struct, task_struct)

Suggested-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200711215329.41165-4-jolsa@kernel.org
2020-07-13 10:42:02 -07:00
Kees Cook fe4bfff86e seccomp: Use -1 marker for end of mode 1 syscall list
The terminator for the mode 1 syscalls list was a 0, but that could be
a valid syscall number (e.g. x86_64 __NR_read). By luck, __NR_read was
listed first and the loop construct would not test it, so there was no
bug. However, this is fragile. Replace the terminator with -1 instead,
and make the variable name for mode 1 syscall lists more descriptive.

Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Will Drewry <wad@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
2020-07-10 16:01:52 -07:00
Sean Christopherson 2aa9c199cf KVM: Move x86's version of struct kvm_mmu_memory_cache to common code
Move x86's 'struct kvm_mmu_memory_cache' to common code in anticipation
of moving the entire x86 implementation code to common KVM and reusing
it for arm64 and MIPS.  Add a new architecture specific asm/kvm_types.h
to control the existence and parameters of the struct.  The new header
is needed to avoid a chicken-and-egg problem with asm/kvm_host.h as all
architectures define instances of the struct in their vCPU structs.

Add an asm-generic version of kvm_types.h to avoid having empty files on
PPC and s390 in the long term, and for arm64 and mips in the short term.

Suggested-by: Christoffer Dall <christoffer.dall@arm.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200703023545.8771-15-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-07-09 13:29:42 -04:00
Peter Zijlstra 85c2ce9104 sched, vmlinux.lds: Increase STRUCT_ALIGNMENT to 64 bytes for GCC-4.9
For some mysterious reason GCC-4.9 has a 64 byte section alignment for
structures, all other GCC versions (and Clang) tested (including 4.8
and 5.0) are fine with the 32 bytes alignment.

Getting this right is important for the new SCHED_DATA macro that
creates an explicitly ordered array of 'struct sched_class' in the
linker script and expect pointer arithmetic to work.

Fixes: c3a340f7e7 ("sched: Have sched_class_highest define by vmlinux.lds.h")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200630144905.GX4817@hirez.programming.kicks-ass.net
2020-07-08 11:39:00 +02:00
Peter Zijlstra faa2fd7cba Merge branch 'sched/urgent' 2020-07-08 11:38:59 +02:00
Peter Zijlstra (Intel) 2631ed00b0 tlb: mmu_gather: add tlb_flush_*_range APIs
tlb_flush_{pte|pmd|pud|p4d}_range() adjust the tlb->start and
tlb->end, then set corresponding cleared_*.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Zhenyu Ye <yezhenyu2@huawei.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20200625080314.230-5-yezhenyu2@huawei.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-07-07 11:23:46 +01:00
Stephen Rothwell 8dbdd5049c make asm-generic/cacheflush.h more standalone
Some s390 builds get these warnings:

  include/asm-generic/cacheflush.h:16:42: warning: 'struct mm_struct' declared inside parameter list will not be visible outside of this definition or declaration
  include/asm-generic/cacheflush.h:22:46: warning: 'struct mm_struct' declared inside parameter list will not be visible outside of this definition or declaration
  include/asm-generic/cacheflush.h:28:45: warning: 'struct vm_area_struct' declared inside parameter list will not be visible outside of this definition or declaration
  include/asm-generic/cacheflush.h:36:44: warning: 'struct vm_area_struct' declared inside parameter list will not be visible outside of this definition or declaration
  include/asm-generic/cacheflush.h:44:45: warning: 'struct page' declared inside parameter list will not be visible outside of this definition or declaration
  include/asm-generic/cacheflush.h:52:50: warning: 'struct address_space' declared inside parameter list will not be visible outside of this definition or declaration
  include/asm-generic/cacheflush.h:58:52: warning: 'struct address_space' declared inside parameter list will not be visible outside of this definition or declaration
  include/asm-generic/cacheflush.h:75:17: warning: 'struct page' declared inside parameter list will not be visible outside of this definition or declaration
  include/asm-generic/cacheflush.h:74:45: warning: 'struct vm_area_struct' declared inside parameter list will not be visible outside of this definition or declaration
  include/asm-generic/cacheflush.h:82:16: warning: 'struct page' declared inside parameter list will not be visible outside of this definition or declaration
  include/asm-generic/cacheflush.h:81:50: warning: 'struct vm_area_struct' declared inside parameter list will not be visible outside of this definition or declaration

Forward declare the named structs to get rid of these.

Link: http://lkml.kernel.org/r/20200623135714.4dae4b8a@canb.auug.org.au
Fixes: e0cf615d72 ("asm-generic: don't include <linux/mm.h> in cacheflush.h")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-26 00:27:37 -07:00
Steven Rostedt (VMware) c3a340f7e7 sched: Have sched_class_highest define by vmlinux.lds.h
Now that the sched_class descriptors are defined by the linker script, and
this needs to be aware of the existance of stop_sched_class when SMP is
enabled or not, as it is used as the "highest" priority when defined. Move
the declaration of sched_class_highest to the same location in the linker
script that inserts stop_sched_class, and this will also make it easier to
see what should be defined as the highest class, as this linker script
location defines the priorities as well.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191219214558.682913590@goodmis.org
2020-06-25 13:45:44 +02:00
Steven Rostedt (VMware) 590d697963 sched: Force the address order of each sched class descriptor
In order to make a micro optimization in pick_next_task(), the order of the
sched class descriptor address must be in the same order as their priority
to each other. That is:

 &idle_sched_class < &fair_sched_class < &rt_sched_class <
 &dl_sched_class < &stop_sched_class

In order to guarantee this order of the sched class descriptors, add each
one into their own data section and force the order in the linker script.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/157675913272.349305.8936736338884044103.stgit@localhost.localdomain
2020-06-25 13:45:43 +02:00
Christophe Leroy 481e980a7c mm: Allow arches to provide ptep_get()
Since commit 9e343b467c ("READ_ONCE: Enforce atomicity for
{READ,WRITE}_ONCE() memory accesses") it is not possible anymore to
use READ_ONCE() to access complex page table entries like the one
defined for powerpc 8xx with 16k size pages.

Define a ptep_get() helper that architectures can override instead
of performing a READ_ONCE() on the page table entry pointer.

Fixes: 9e343b467c ("READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/087fa12b6e920e32315136b998aa834f99242695.1592225558.git.christophe.leroy@csgroup.eu
2020-06-20 22:14:53 +10:00
Linus Torvalds 076f14be7f The X86 entry, exception and interrupt code rework
This all started about 6 month ago with the attempt to move the Posix CPU
 timer heavy lifting out of the timer interrupt code and just have lockless
 quick checks in that code path. Trivial 5 patches.
 
 This unearthed an inconsistency in the KVM handling of task work and the
 review requested to move all of this into generic code so other
 architectures can share.
 
 Valid request and solved with another 25 patches but those unearthed
 inconsistencies vs. RCU and instrumentation.
 
 Digging into this made it obvious that there are quite some inconsistencies
 vs. instrumentation in general. The int3 text poke handling in particular
 was completely unprotected and with the batched update of trace events even
 more likely to expose to endless int3 recursion.
 
 In parallel the RCU implications of instrumenting fragile entry code came
 up in several discussions.
 
 The conclusion of the X86 maintainer team was to go all the way and make
 the protection against any form of instrumentation of fragile and dangerous
 code pathes enforcable and verifiable by tooling.
 
 A first batch of preparatory work hit mainline with commit d5f744f9a2.
 
 The (almost) full solution introduced a new code section '.noinstr.text'
 into which all code which needs to be protected from instrumentation of all
 sorts goes into. Any call into instrumentable code out of this section has
 to be annotated. objtool has support to validate this. Kprobes now excludes
 this section fully which also prevents BPF from fiddling with it and all
 'noinstr' annotated functions also keep ftrace off. The section, kprobes
 and objtool changes are already merged.
 
 The major changes coming with this are:
 
     - Preparatory cleanups
 
     - Annotating of relevant functions to move them into the noinstr.text
       section or enforcing inlining by marking them __always_inline so the
       compiler cannot misplace or instrument them.
 
     - Splitting and simplifying the idtentry macro maze so that it is now
       clearly separated into simple exception entries and the more
       interesting ones which use interrupt stacks and have the paranoid
       handling vs. CR3 and GS.
 
     - Move quite some of the low level ASM functionality into C code:
 
        - enter_from and exit to user space handling. The ASM code now calls
          into C after doing the really necessary ASM handling and the return
 	 path goes back out without bells and whistels in ASM.
 
        - exception entry/exit got the equivivalent treatment
 
        - move all IRQ tracepoints from ASM to C so they can be placed as
          appropriate which is especially important for the int3 recursion
          issue.
 
     - Consolidate the declaration and definition of entry points between 32
       and 64 bit. They share a common header and macros now.
 
     - Remove the extra device interrupt entry maze and just use the regular
       exception entry code.
 
     - All ASM entry points except NMI are now generated from the shared header
       file and the corresponding macros in the 32 and 64 bit entry ASM.
 
     - The C code entry points are consolidated as well with the help of
       DEFINE_IDTENTRY*() macros. This allows to ensure at one central point
       that all corresponding entry points share the same semantics. The
       actual function body for most entry points is in an instrumentable
       and sane state.
 
       There are special macros for the more sensitive entry points,
       e.g. INT3 and of course the nasty paranoid #NMI, #MCE, #DB and #DF.
       They allow to put the whole entry instrumentation and RCU handling
       into safe places instead of the previous pray that it is correct
       approach.
 
     - The INT3 text poke handling is now completely isolated and the
       recursion issue banned. Aside of the entry rework this required other
       isolation work, e.g. the ability to force inline bsearch.
 
     - Prevent #DB on fragile entry code, entry relevant memory and disable
       it on NMI, #MC entry, which allowed to get rid of the nested #DB IST
       stack shifting hackery.
 
     - A few other cleanups and enhancements which have been made possible
       through this and already merged changes, e.g. consolidating and
       further restricting the IDT code so the IDT table becomes RO after
       init which removes yet another popular attack vector
 
     - About 680 lines of ASM maze are gone.
 
 There are a few open issues:
 
    - An escape out of the noinstr section in the MCE handler which needs
      some more thought but under the aspect that MCE is a complete
      trainwreck by design and the propability to survive it is low, this was
      not high on the priority list.
 
    - Paravirtualization
 
      When PV is enabled then objtool complains about a bunch of indirect
      calls out of the noinstr section. There are a few straight forward
      ways to fix this, but the other issues vs. general correctness were
      more pressing than parawitz.
 
    - KVM
 
      KVM is inconsistent as well. Patches have been posted, but they have
      not yet been commented on or picked up by the KVM folks.
 
    - IDLE
 
      Pretty much the same problems can be found in the low level idle code
      especially the parts where RCU stopped watching. This was beyond the
      scope of the more obvious and exposable problems and is on the todo
      list.
 
 The lesson learned from this brain melting exercise to morph the evolved
 code base into something which can be validated and understood is that once
 again the violation of the most important engineering principle
 "correctness first" has caused quite a few people to spend valuable time on
 problems which could have been avoided in the first place. The "features
 first" tinkering mindset really has to stop.
 
 With that I want to say thanks to everyone involved in contributing to this
 effort. Special thanks go to the following people (alphabetical order):
 
    Alexandre Chartre
    Andy Lutomirski
    Borislav Petkov
    Brian Gerst
    Frederic Weisbecker
    Josh Poimboeuf
    Juergen Gross
    Lai Jiangshan
    Macro Elver
    Paolo Bonzini
    Paul McKenney
    Peter Zijlstra
    Vitaly Kuznetsov
    Will Deacon
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl7j510THHRnbHhAbGlu
 dXRyb25peC5kZQAKCRCmGPVMDXSYoU2WD/4refvaNm08fG7aiVYem3JJzr0+Pq5O
 /opwnI/1D973ApApj5W/Nd53sN5tVqOiXncSKgywRBWZxRCAGjVYypl9rjpvXu4l
 HlMjhEKBmWkDryxxrM98Vr7hl3hnId5laR56oFfH+G4LUsItaV6Uak/HfXZ4Mq1k
 iYVbEtl2CN+KJjvSgZ6Y1l853Ab5mmGvmeGNHHWCj8ZyjF3cOLoelDTQNnsb0wXM
 crKXBcXJSsCWKYyJ5PTvB82crQCET7Su+LgwK06w/ZbW1//2hVIjSCiN5o/V+aRJ
 06BZNMj8v9tfglkN8LEQvRIjTlnEQ2sq3GxbrVtA53zxkzbBCBJQ96w8yYzQX0ux
 yhqQ/aIZJ1wTYEjJzSkftwLNMRHpaOUnKvJndXRKAYi+eGI7syF61qcZSYGKuAQ/
 bK3b/CzU6QWr1235oTADxh4isEwxA0Pg5wtJCfDDOG0MJ9ALMSOGUkhoiz5EqpkU
 mzFAwfG/Uj7hRjlkms7Yj2OjZfnU7iypj63GgpXghLjr5ksRFKEOMw8e1GXltVHs
 zzwghUjqp2EPq0VOOQn3lp9lol5Prc3xfFHczKpO+CJW6Rpa4YVdqJmejBqJy/on
 Hh/T/ST3wa2qBeAw89vZIeWiUJZZCsQ0f//+2hAbzJY45Y6DuR9vbTAPb9agRgOM
 xg+YaCfpQqFc1A==
 =llba
 -----END PGP SIGNATURE-----

Merge tag 'x86-entry-2020-06-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 entry updates from Thomas Gleixner:
 "The x86 entry, exception and interrupt code rework

  This all started about 6 month ago with the attempt to move the Posix
  CPU timer heavy lifting out of the timer interrupt code and just have
  lockless quick checks in that code path. Trivial 5 patches.

  This unearthed an inconsistency in the KVM handling of task work and
  the review requested to move all of this into generic code so other
  architectures can share.

  Valid request and solved with another 25 patches but those unearthed
  inconsistencies vs. RCU and instrumentation.

  Digging into this made it obvious that there are quite some
  inconsistencies vs. instrumentation in general. The int3 text poke
  handling in particular was completely unprotected and with the batched
  update of trace events even more likely to expose to endless int3
  recursion.

  In parallel the RCU implications of instrumenting fragile entry code
  came up in several discussions.

  The conclusion of the x86 maintainer team was to go all the way and
  make the protection against any form of instrumentation of fragile and
  dangerous code pathes enforcable and verifiable by tooling.

  A first batch of preparatory work hit mainline with commit
  d5f744f9a2 ("Pull x86 entry code updates from Thomas Gleixner")

  That (almost) full solution introduced a new code section
  '.noinstr.text' into which all code which needs to be protected from
  instrumentation of all sorts goes into. Any call into instrumentable
  code out of this section has to be annotated. objtool has support to
  validate this.

  Kprobes now excludes this section fully which also prevents BPF from
  fiddling with it and all 'noinstr' annotated functions also keep
  ftrace off. The section, kprobes and objtool changes are already
  merged.

  The major changes coming with this are:

    - Preparatory cleanups

    - Annotating of relevant functions to move them into the
      noinstr.text section or enforcing inlining by marking them
      __always_inline so the compiler cannot misplace or instrument
      them.

    - Splitting and simplifying the idtentry macro maze so that it is
      now clearly separated into simple exception entries and the more
      interesting ones which use interrupt stacks and have the paranoid
      handling vs. CR3 and GS.

    - Move quite some of the low level ASM functionality into C code:

       - enter_from and exit to user space handling. The ASM code now
         calls into C after doing the really necessary ASM handling and
         the return path goes back out without bells and whistels in
         ASM.

       - exception entry/exit got the equivivalent treatment

       - move all IRQ tracepoints from ASM to C so they can be placed as
         appropriate which is especially important for the int3
         recursion issue.

    - Consolidate the declaration and definition of entry points between
      32 and 64 bit. They share a common header and macros now.

    - Remove the extra device interrupt entry maze and just use the
      regular exception entry code.

    - All ASM entry points except NMI are now generated from the shared
      header file and the corresponding macros in the 32 and 64 bit
      entry ASM.

    - The C code entry points are consolidated as well with the help of
      DEFINE_IDTENTRY*() macros. This allows to ensure at one central
      point that all corresponding entry points share the same
      semantics. The actual function body for most entry points is in an
      instrumentable and sane state.

      There are special macros for the more sensitive entry points, e.g.
      INT3 and of course the nasty paranoid #NMI, #MCE, #DB and #DF.
      They allow to put the whole entry instrumentation and RCU handling
      into safe places instead of the previous pray that it is correct
      approach.

    - The INT3 text poke handling is now completely isolated and the
      recursion issue banned. Aside of the entry rework this required
      other isolation work, e.g. the ability to force inline bsearch.

    - Prevent #DB on fragile entry code, entry relevant memory and
      disable it on NMI, #MC entry, which allowed to get rid of the
      nested #DB IST stack shifting hackery.

    - A few other cleanups and enhancements which have been made
      possible through this and already merged changes, e.g.
      consolidating and further restricting the IDT code so the IDT
      table becomes RO after init which removes yet another popular
      attack vector

    - About 680 lines of ASM maze are gone.

  There are a few open issues:

   - An escape out of the noinstr section in the MCE handler which needs
     some more thought but under the aspect that MCE is a complete
     trainwreck by design and the propability to survive it is low, this
     was not high on the priority list.

   - Paravirtualization

     When PV is enabled then objtool complains about a bunch of indirect
     calls out of the noinstr section. There are a few straight forward
     ways to fix this, but the other issues vs. general correctness were
     more pressing than parawitz.

   - KVM

     KVM is inconsistent as well. Patches have been posted, but they
     have not yet been commented on or picked up by the KVM folks.

   - IDLE

     Pretty much the same problems can be found in the low level idle
     code especially the parts where RCU stopped watching. This was
     beyond the scope of the more obvious and exposable problems and is
     on the todo list.

  The lesson learned from this brain melting exercise to morph the
  evolved code base into something which can be validated and understood
  is that once again the violation of the most important engineering
  principle "correctness first" has caused quite a few people to spend
  valuable time on problems which could have been avoided in the first
  place. The "features first" tinkering mindset really has to stop.

  With that I want to say thanks to everyone involved in contributing to
  this effort. Special thanks go to the following people (alphabetical
  order): Alexandre Chartre, Andy Lutomirski, Borislav Petkov, Brian
  Gerst, Frederic Weisbecker, Josh Poimboeuf, Juergen Gross, Lai
  Jiangshan, Macro Elver, Paolo Bonzin,i Paul McKenney, Peter Zijlstra,
  Vitaly Kuznetsov, and Will Deacon"

* tag 'x86-entry-2020-06-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (142 commits)
  x86/entry: Force rcu_irq_enter() when in idle task
  x86/entry: Make NMI use IDTENTRY_RAW
  x86/entry: Treat BUG/WARN as NMI-like entries
  x86/entry: Unbreak __irqentry_text_start/end magic
  x86/entry: __always_inline CR2 for noinstr
  lockdep: __always_inline more for noinstr
  x86/entry: Re-order #DB handler to avoid *SAN instrumentation
  x86/entry: __always_inline arch_atomic_* for noinstr
  x86/entry: __always_inline irqflags for noinstr
  x86/entry: __always_inline debugreg for noinstr
  x86/idt: Consolidate idt functionality
  x86/idt: Cleanup trap_init()
  x86/idt: Use proper constants for table size
  x86/idt: Add comments about early #PF handling
  x86/idt: Mark init only functions __init
  x86/entry: Rename trace_hardirqs_off_prepare()
  x86/entry: Clarify irq_{enter,exit}_rcu()
  x86/entry: Remove DBn stacks
  x86/entry: Remove debug IDT frobbing
  x86/entry: Optimize local_db_save() for virt
  ...
2020-06-13 10:05:47 -07:00
Thomas Gleixner 37d1a04b13 Rebase locking/kcsan to locking/urgent
Merge the state of the locking kcsan branch before the read/write_once()
and the atomics modifications got merged.

Squash the fallout of the rebase on top of the read/write once and atomic
fallback work into the merge. The history of the original branch is
preserved in tag locking-kcsan-2020-06-02.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2020-06-11 20:02:46 +02:00
Thomas Gleixner 5916d5f9b3 bug: Annotate WARN/BUG/stackfail as noinstr safe
Warnings, bugs and stack protection fails from noinstr sections, e.g. low
level and early entry code, are likely to be fatal.

Mark them as "safe" to be invoked from noinstr protected code to avoid
annotating all usage sites. Getting the information out is important.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200505134100.376598577@linutronix.de
2020-06-11 15:14:36 +02:00
Linus Torvalds 4152d146ee Merge branch 'rwonce/rework' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux
Pull READ/WRITE_ONCE rework from Will Deacon:
 "This the READ_ONCE rework I've been working on for a while, which
  bumps the minimum GCC version and improves code-gen on arm64 when
  stack protector is enabled"

[ Side note: I'm _really_ tempted to raise the minimum gcc version to
  4.9, so that we can just say that we require _Generic() support.

  That would allow us to more cleanly handle a lot of the cases where we
  depend on very complex macros with 'sizeof' or __builtin_choose_expr()
  with __builtin_types_compatible_p() etc.

  This branch has a workaround for sparse not handling _Generic(),
  either, but that was already fixed in the sparse development branch,
  so it's really just gcc-4.9 that we'd require.   - Linus ]

* 'rwonce/rework' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux:
  compiler_types.h: Use unoptimized __unqual_scalar_typeof for sparse
  compiler_types.h: Optimize __unqual_scalar_typeof compilation time
  compiler.h: Enforce that READ_ONCE_NOCHECK() access size is sizeof(long)
  compiler-types.h: Include naked type in __pick_integer_type() match
  READ_ONCE: Fix comment describing 2x32-bit atomicity
  gcov: Remove old GCC 3.4 support
  arm64: barrier: Use '__unqual_scalar_typeof' for acquire/release macros
  locking/barriers: Use '__unqual_scalar_typeof' for load-acquire macros
  READ_ONCE: Drop pointer qualifiers when reading from scalar types
  READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses
  READ_ONCE: Simplify implementations of {READ,WRITE}_ONCE()
  arm64: csum: Disable KASAN for do_csum()
  fault_inject: Don't rely on "return value" from WRITE_ONCE()
  net: tls: Avoid assigning 'const' pointer to non-const pointer
  netfilter: Avoid assigning 'const' pointer to non-const pointer
  compiler/gcc: Raise minimum GCC version for kernel builds to 4.8
2020-06-10 14:46:54 -07:00
Mike Rapoport 974b9b2c68 mm: consolidate pte_index() and pte_offset_*() definitions
All architectures define pte_index() as

	(address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)

and all architectures define pte_offset_kernel() as an entry in the array
of PTEs indexed by the pte_index().

For the most architectures the pte_offset_kernel() implementation relies
on the availability of pmd_page_vaddr() that converts a PMD entry value to
the virtual address of the page containing PTEs array.

Let's move x86 definitions of the PTE accessors to the generic place in
<linux/pgtable.h> and then simply drop the respective definitions from the
other architectures.

The architectures that didn't provide pmd_page_vaddr() are updated to have
that defined.

The generic implementation of pte_offset_kernel() can be overridden by an
architecture and alpha makes use of this because it has special ordering
requirements for its version of pte_offset_kernel().

[rppt@linux.ibm.com: v2]
  Link: http://lkml.kernel.org/r/20200514170327.31389-11-rppt@kernel.org
[rppt@linux.ibm.com: update]
  Link: http://lkml.kernel.org/r/20200514170327.31389-12-rppt@kernel.org
[rppt@linux.ibm.com: update]
  Link: http://lkml.kernel.org/r/20200514170327.31389-13-rppt@kernel.org
[akpm@linux-foundation.org: fix x86 warning]
[sfr@canb.auug.org.au: fix powerpc build]
  Link: http://lkml.kernel.org/r/20200607153443.GB738695@linux.ibm.com

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-10-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-09 09:39:14 -07:00
Mike Rapoport ca5999fde0 mm: introduce include/linux/pgtable.h
The include/linux/pgtable.h is going to be the home of generic page table
manipulation functions.

Start with moving asm-generic/pgtable.h to include/linux/pgtable.h and
make the latter include asm/pgtable.h.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-3-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-09 09:39:13 -07:00
Christoph Hellwig 1268c33382 asm-generic: add a flush_icache_user_range stub
Define flush_icache_user_range to flush_icache_range unless the
architecture provides its own implementation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: http://lkml.kernel.org/r/20200515143646.3857579-21-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-08 11:05:58 -07:00
Christoph Hellwig 885f7f8e30 mm: rename flush_icache_user_range to flush_icache_user_page
The function currently known as flush_icache_user_range only operates on
a single page.  Rename it to flush_icache_user_page as we'll need the
name flush_icache_user_range for something else soon.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20200515143646.3857579-20-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-08 11:05:58 -07:00
Christoph Hellwig 76b3b58fac asm-generic: improve the flush_dcache_page stub
There is a magic ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE cpp symbol that
guards non-stub availability of flush_dcache_pagge.  Use that to check
if flush_dcache_pagg is implemented.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: http://lkml.kernel.org/r/20200515143646.3857579-8-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-08 11:05:57 -07:00
Christoph Hellwig e0cf615d72 asm-generic: don't include <linux/mm.h> in cacheflush.h
This seems to lead to some crazy include loops when using
asm-generic/cacheflush.h on more architectures, so leave it to the arch
header for now.

[hch@lst.de: fix warning]
  Link: http://lkml.kernel.org/r/20200520173520.GA11199@lst.de

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Will Deacon <will@kernel.org>
Cc: Nick Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: http://lkml.kernel.org/r/20200515143646.3857579-7-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-08 11:05:57 -07:00
Christoph Hellwig 92a73bd29a asm-generic: fix the inclusion guards for cacheflush.h
cacheflush.h uses a somewhat to generic include guard name that clashes
with various arch files.  Use a more specific one.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: http://lkml.kernel.org/r/20200515143646.3857579-6-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-08 11:05:57 -07:00
Linus Torvalds 7ae77150d9 powerpc updates for 5.8
- Support for userspace to send requests directly to the on-chip GZIP
    accelerator on Power9.
 
  - Rework of our lockless page table walking (__find_linux_pte()) to make it
    safe against parallel page table manipulations without relying on an IPI for
    serialisation.
 
  - A series of fixes & enhancements to make our machine check handling more
    robust.
 
  - Lots of plumbing to add support for "prefixed" (64-bit) instructions on
    Power10.
 
  - Support for using huge pages for the linear mapping on 8xx (32-bit).
 
  - Remove obsolete Xilinx PPC405/PPC440 support, and an associated sound driver.
 
  - Removal of some obsolete 40x platforms and associated cruft.
 
  - Initial support for booting on Power10.
 
  - Lots of other small features, cleanups & fixes.
 
 Thanks to:
   Alexey Kardashevskiy, Alistair Popple, Andrew Donnellan, Andrey Abramov,
   Aneesh Kumar K.V, Balamuruhan S, Bharata B Rao, Bulent Abali, Cédric Le
   Goater, Chen Zhou, Christian Zigotzky, Christophe JAILLET, Christophe Leroy,
   Dmitry Torokhov, Emmanuel Nicolet, Erhard F., Gautham R. Shenoy, Geoff Levand,
   George Spelvin, Greg Kurz, Gustavo A. R. Silva, Gustavo Walbon, Haren Myneni,
   Hari Bathini, Joel Stanley, Jordan Niethe, Kajol Jain, Kees Cook, Leonardo
   Bras, Madhavan Srinivasan., Mahesh Salgaonkar, Markus Elfring, Michael
   Neuling, Michal Simek, Nathan Chancellor, Nathan Lynch, Naveen N. Rao,
   Nicholas Piggin, Oliver O'Halloran, Paul Mackerras, Pingfan Liu, Qian Cai, Ram
   Pai, Raphael Moreira Zinsly, Ravi Bangoria, Sam Bobroff, Sandipan Das, Segher
   Boessenkool, Stephen Rothwell, Sukadev Bhattiprolu, Tyrel Datwyler, Wolfram
   Sang, Xiongfeng Wang.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCAAxFiEEJFGtCPCthwEv2Y/bUevqPMjhpYAFAl7aYZ8THG1wZUBlbGxl
 cm1hbi5pZC5hdQAKCRBR6+o8yOGlgPiKD/9zNCuZLFMAFrIdbm0HlYA2RGYZFT75
 GUHsqYyei1pxA7PgM3KwJiXELVODsBv0eQbgNh1tbecKrxPRegN/cywd1KLjPZ7I
 v5/qweQP8MvR0RhzjbhvUcO0jq/f8u2LbJr5mUfVzjU6tAvrvcWo3oZqDElsekCS
 kgyOH3r1vZ2PLTMiGFhb0gWi2iqc+6BHU1AFCGPCMjB1Vu5d5+54VvZ/6lllGsOF
 yg9CBXmmVvQ+Bn6tH4zdEB78FYxnAIwBqlbmL79i5ca+HQJ0Sw6HuPRy9XYq35p6
 2EiXS4Wrgp7i7+1TN3HO362u5Onb8TSyQU7NS6yCFPoJ6JQxcJMBIw6mHhnXOPuZ
 CrjgcdwUMjx8uDoKmX1Epbfuex2w+AysW+4yBHPFiSgl3klKC3D0wi95mR485w2F
 rN8uzJtrDeFKcYZJG7IoB/cgFCCPKGf9HaXr8q0S/jBKMffx91ul3cfzlfdIXOCw
 FDNw/+ZX7UD6ddFEG12ZTO+vdL8yf1uCRT/DIZwUiDMIA0+M6F4nc7j3lfyZfoO1
 65f9UlhoLxScq7VH2fKH4UtZatO9cPID2z1CmiY4UbUIPtFDepSuYClgLF+Duf4b
 rkfxhKU0+Ja1zNH5XNc+L+Bc5/W4lFiJXz02dYIjtHoUpWkc1aToOETVwzggYFNM
 G3PXIBOI0jRgRw==
 =o0WU
 -----END PGP SIGNATURE-----

Merge tag 'powerpc-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - Support for userspace to send requests directly to the on-chip GZIP
   accelerator on Power9.

 - Rework of our lockless page table walking (__find_linux_pte()) to
   make it safe against parallel page table manipulations without
   relying on an IPI for serialisation.

 - A series of fixes & enhancements to make our machine check handling
   more robust.

 - Lots of plumbing to add support for "prefixed" (64-bit) instructions
   on Power10.

 - Support for using huge pages for the linear mapping on 8xx (32-bit).

 - Remove obsolete Xilinx PPC405/PPC440 support, and an associated sound
   driver.

 - Removal of some obsolete 40x platforms and associated cruft.

 - Initial support for booting on Power10.

 - Lots of other small features, cleanups & fixes.

Thanks to: Alexey Kardashevskiy, Alistair Popple, Andrew Donnellan,
Andrey Abramov, Aneesh Kumar K.V, Balamuruhan S, Bharata B Rao, Bulent
Abali, Cédric Le Goater, Chen Zhou, Christian Zigotzky, Christophe
JAILLET, Christophe Leroy, Dmitry Torokhov, Emmanuel Nicolet, Erhard F.,
Gautham R. Shenoy, Geoff Levand, George Spelvin, Greg Kurz, Gustavo A.
R. Silva, Gustavo Walbon, Haren Myneni, Hari Bathini, Joel Stanley,
Jordan Niethe, Kajol Jain, Kees Cook, Leonardo Bras, Madhavan
Srinivasan., Mahesh Salgaonkar, Markus Elfring, Michael Neuling, Michal
Simek, Nathan Chancellor, Nathan Lynch, Naveen N. Rao, Nicholas Piggin,
Oliver O'Halloran, Paul Mackerras, Pingfan Liu, Qian Cai, Ram Pai,
Raphael Moreira Zinsly, Ravi Bangoria, Sam Bobroff, Sandipan Das, Segher
Boessenkool, Stephen Rothwell, Sukadev Bhattiprolu, Tyrel Datwyler,
Wolfram Sang, Xiongfeng Wang.

* tag 'powerpc-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (299 commits)
  powerpc/pseries: Make vio and ibmebus initcalls pseries specific
  cxl: Remove dead Kconfig options
  powerpc: Add POWER10 architected mode
  powerpc/dt_cpu_ftrs: Add MMA feature
  powerpc/dt_cpu_ftrs: Enable Prefixed Instructions
  powerpc/dt_cpu_ftrs: Advertise support for ISA v3.1 if selected
  powerpc: Add support for ISA v3.1
  powerpc: Add new HWCAP bits
  powerpc/64s: Don't set FSCR bits in INIT_THREAD
  powerpc/64s: Save FSCR to init_task.thread.fscr after feature init
  powerpc/64s: Don't let DT CPU features set FSCR_DSCR
  powerpc/64s: Don't init FSCR_DSCR in __init_FSCR()
  powerpc/32s: Fix another build failure with CONFIG_PPC_KUAP_DEBUG
  powerpc/module_64: Use special stub for _mcount() with -mprofile-kernel
  powerpc/module_64: Simplify check for -mprofile-kernel ftrace relocations
  powerpc/module_64: Consolidate ftrace code
  powerpc/32: Disable KASAN with pages bigger than 16k
  powerpc/uaccess: Don't set KUEP by default on book3s/32
  powerpc/uaccess: Don't set KUAP by default on book3s/32
  powerpc/8xx: Reduce time spent in allow_user_access() and friends
  ...
2020-06-05 12:39:30 -07:00
Linus Torvalds 828f3e18e1 ARM/SoC: drivers for v5.7
These are updates to SoC specific drivers that did not have
 another subsystem maintainer tree to go through for some
 reason:
 
 - Some bus and memory drivers for the MIPS P5600 based
   Baikal-T1 SoC that is getting added through the MIPS tree.
 
 - There are new soc_device identification drivers for TI K3,
   Qualcomm MSM8939
 
 - New reset controller drivers for NXP i.MX8MP, Renesas
   RZ/G1H, and Hisilicon hi6220
 
 - The SCMI firmware interface can now work across ARM SMC/HVC
   as a transport.
 
 - Mediatek platforms now use a new driver for their "MMSYS"
   hardware block that controls clocks and some other aspects
   in behalf of the media and gpu drivers.
 
 - Some Tegra processors have improved power management
   support, including getting woken up by the PMIC and cluster
   power down during idle.
 
 - A new v4l staging driver for Tegra is added.
 
 - Cleanups and minor bugfixes for TI, NXP, Hisilicon,
   Mediatek, and Tegra.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEo6/YBQwIrVS28WGKmmx57+YAGNkFAl7XvgAACgkQmmx57+YA
 GNmj/hAAnAJ/hYehLfgCe711HUntgeRkaoTVpCt8BJNMdxsa23sn3V6k5+WYn1uG
 PtlgpefZEMHLUEEVDegR4nZXLG0Pzu1SR12KW34YPcQKkNo/+vlQ9zYUajnJ/KX6
 10zdLSIzHfk1VtXKvvQQ8xFyE+S/trGmjC57E6gfoCUT3rl1maD+ccVXUBaz9oob
 wuMxGXQAl57mio5yT1OfSk6Fev39xRE2dN1hzP7KUYhsemZajBwBBW5wVJZCsCB8
 LCGmxVkavM7BV4r2NokbBDs5rlfedBl/P/IPd9Is5a5tuGUkSsVRG9zqShxYLGM3
 S06az6POQFwXKFJoUKW0dK/Koy0D7BK+vhUBPzFv4HZ8iDCVf6Jju2MJ02GMqHPj
 OOrXaCbLYrvN/edVUWeeFywqwMbYTRwC4DxyTq5m7HxEB004xTOhs0rX5aR0u4n1
 bbsR97LguolwH9iEMzd3F3jCiKBcMecH3lAh5WcrtwlFIRrNhbWoGDoA/4TuORFS
 b11rgsTRIJ5Vc++D1HnSnx0ZZvUzyluMvygdALnSgVah6xYe6KVw9Kg/wioAJ04G
 uSTidqP3qRhsyET2HQo7CxdVfZbKfP25iKCKrdhQziztKvhF8qrUmZKloXOodRw+
 ewYSRmv8c324OYYit1X43oAdW8dntq1XbSIauaqxEb4JC7x/xRY=
 =44Jc
 -----END PGP SIGNATURE-----

Merge tag 'arm-drivers-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM/SoC driver updates from Arnd Bergmann:
 "These are updates to SoC specific drivers that did not have another
  subsystem maintainer tree to go through for some reason:

   - Some bus and memory drivers for the MIPS P5600 based Baikal-T1 SoC
     that is getting added through the MIPS tree.

   - There are new soc_device identification drivers for TI K3, Qualcomm
     MSM8939

   - New reset controller drivers for NXP i.MX8MP, Renesas RZ/G1H, and
     Hisilicon hi6220

   - The SCMI firmware interface can now work across ARM SMC/HVC as a
     transport.

   - Mediatek platforms now use a new driver for their "MMSYS" hardware
     block that controls clocks and some other aspects in behalf of the
     media and gpu drivers.

   - Some Tegra processors have improved power management support,
     including getting woken up by the PMIC and cluster power down
     during idle.

   - A new v4l staging driver for Tegra is added.

   - Cleanups and minor bugfixes for TI, NXP, Hisilicon, Mediatek, and
     Tegra"

* tag 'arm-drivers-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (155 commits)
  clk: sprd: fix compile-testing
  bus: bt1-axi: Build the driver into the kernel
  bus: bt1-apb: Build the driver into the kernel
  bus: bt1-axi: Use sysfs_streq instead of strncmp
  bus: bt1-axi: Optimize the return points in the driver
  bus: bt1-apb: Use sysfs_streq instead of strncmp
  bus: bt1-apb: Use PTR_ERR_OR_ZERO to return from request-regs method
  bus: bt1-apb: Fix show/store callback identations
  bus: bt1-apb: Include linux/io.h
  dt-bindings: memory: Add Baikal-T1 L2-cache Control Block binding
  memory: Add Baikal-T1 L2-cache Control Block driver
  bus: Add Baikal-T1 APB-bus driver
  bus: Add Baikal-T1 AXI-bus driver
  dt-bindings: bus: Add Baikal-T1 APB-bus binding
  dt-bindings: bus: Add Baikal-T1 AXI-bus binding
  staging: tegra-video: fix V4L2 dependency
  tee: fix crypto select
  drivers: soc: ti: knav_qmss_queue: Make knav_gp_range_ops static
  soc: ti: add k3 platforms chipid module driver
  dt-bindings: soc: ti: add binding for k3 platforms chipid module
  ...
2020-06-04 19:56:20 -07:00
Mike Rapoport f089dcc742 mm: remove __ARCH_HAS_5LEVEL_HACK and include/asm-generic/5level-fixup.h
There are no architectures that use include/asm-generic/5level-fixup.h
therefore it can be removed along with __ARCH_HAS_5LEVEL_HACK define and
the code it surrounds

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: James Morse <james.morse@arm.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Julien Thierry <julien.thierry.kdev@gmail.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200414153455.21744-15-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-04 19:06:21 -07:00
Mike Rapoport ee7767430e asm-generic: remove pgtable-nop4d-hack.h
No architecture defines __ARCH_USE_5LEVEL_HACK and therefore
pgtable-nop4d-hack.h will be never actually included.

Remove it.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: James Morse <james.morse@arm.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Julien Thierry <julien.thierry.kdev@gmail.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200414153455.21744-14-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-04 19:06:21 -07:00
Linus Torvalds ee01c4d72a Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:
 "More mm/ work, plenty more to come

  Subsystems affected by this patch series: slub, memcg, gup, kasan,
  pagealloc, hugetlb, vmscan, tools, mempolicy, memblock, hugetlbfs,
  thp, mmap, kconfig"

* akpm: (131 commits)
  arm64: mm: use ARCH_HAS_DEBUG_WX instead of arch defined
  x86: mm: use ARCH_HAS_DEBUG_WX instead of arch defined
  riscv: support DEBUG_WX
  mm: add DEBUG_WX support
  drivers/base/memory.c: cache memory blocks in xarray to accelerate lookup
  mm/thp: rename pmd_mknotpresent() as pmd_mkinvalid()
  powerpc/mm: drop platform defined pmd_mknotpresent()
  mm: thp: don't need to drain lru cache when splitting and mlocking THP
  hugetlbfs: get unmapped area below TASK_UNMAPPED_BASE for hugetlbfs
  sparc32: register memory occupied by kernel as memblock.memory
  include/linux/memblock.h: fix minor typo and unclear comment
  mm, mempolicy: fix up gup usage in lookup_node
  tools/vm/page_owner_sort.c: filter out unneeded line
  mm: swap: memcg: fix memcg stats for huge pages
  mm: swap: fix vmstats for huge pages
  mm: vmscan: limit the range of LRU type balancing
  mm: vmscan: reclaim writepage is IO cost
  mm: vmscan: determine anon/file pressure balance at the reclaim root
  mm: balance LRU lists based on relative thrashing
  mm: only count actual rotations as LRU reclaim cost
  ...
2020-06-03 20:24:15 -07:00
Anshuman Khandual be51e3fde5 arm64/mm: drop __HAVE_ARCH_HUGE_PTEP_GET
Patch series "mm/hugetlb: Add some new generic fallbacks", v3.

This series adds the following new generic fallbacks.  Before that it
drops __HAVE_ARCH_HUGE_PTEP_GET from arm64 platform.

1. is_hugepage_only_range()
2. arch_clear_hugepage_flags()

After this arm (32 bit) remains the sole platform defining it's own
huge_ptep_get() via __HAVE_ARCH_HUGE_PTEP_GET.

This patch (of 3):

Platform specific huge_ptep_get() is required only when fetching the huge
PTE involves more than just dereferencing the page table pointer.  This is
not the case on arm64 platform.  Hence huge_ptep_pte() can be dropped
along with it's __HAVE_ARCH_HUGE_PTEP_GET subscription.  Before that, it
updates the generic huge_ptep_get() with READ_ONCE() which will prevent
known page table issues with THP on arm64.

Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/1588907271-11920-1-git-send-email-anshuman.khandual@arm.com
Link: http://lkml.kernel.org/r//1506527369-19535-1-git-send-email-will.deacon@arm.com/
Link: http://lkml.kernel.org/r/1588907271-11920-2-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-03 20:09:46 -07:00
Linus Torvalds 039aeb9deb ARM:
- Move the arch-specific code into arch/arm64/kvm
 - Start the post-32bit cleanup
 - Cherry-pick a few non-invasive pre-NV patches
 
 x86:
 - Rework of TLB flushing
 - Rework of event injection, especially with respect to nested virtualization
 - Nested AMD event injection facelift, building on the rework of generic code
 and fixing a lot of corner cases
 - Nested AMD live migration support
 - Optimization for TSC deadline MSR writes and IPIs
 - Various cleanups
 - Asynchronous page fault cleanups (from tglx, common topic branch with tip tree)
 - Interrupt-based delivery of asynchronous "page ready" events (host side)
 - Hyper-V MSRs and hypercalls for guest debugging
 - VMX preemption timer fixes
 
 s390:
 - Cleanups
 
 Generic:
 - switch vCPU thread wakeup from swait to rcuwait
 
 The other architectures, and the guest side of the asynchronous page fault
 work, will come next week.
 -----BEGIN PGP SIGNATURE-----
 
 iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAl7VJcYUHHBib256aW5p
 QHJlZGhhdC5jb20ACgkQv/vSX3jHroPf6QgAq4wU5wdd1lTGz/i3DIhNVJNJgJlp
 ozLzRdMaJbdbn5RpAK6PEBd9+pt3+UlojpFB3gpJh2Nazv2OzV4yLQgXXXyyMEx1
 5Hg7b4UCJYDrbkCiegNRv7f/4FWDkQ9dx++RZITIbxeskBBCEI+I7GnmZhGWzuC4
 7kj4ytuKAySF2OEJu0VQF6u0CvrNYfYbQIRKBXjtOwuRK4Q6L63FGMJpYo159MBQ
 asg3B1jB5TcuGZ9zrjL5LkuzaP4qZZHIRs+4kZsH9I6MODHGUxKonrkablfKxyKy
 CFK+iaHCuEXXty5K0VmWM3nrTfvpEjVjbMc7e1QGBQ5oXsDM0pqn84syRg==
 =v7Wn
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
 "ARM:
   - Move the arch-specific code into arch/arm64/kvm

   - Start the post-32bit cleanup

   - Cherry-pick a few non-invasive pre-NV patches

  x86:
   - Rework of TLB flushing

   - Rework of event injection, especially with respect to nested
     virtualization

   - Nested AMD event injection facelift, building on the rework of
     generic code and fixing a lot of corner cases

   - Nested AMD live migration support

   - Optimization for TSC deadline MSR writes and IPIs

   - Various cleanups

   - Asynchronous page fault cleanups (from tglx, common topic branch
     with tip tree)

   - Interrupt-based delivery of asynchronous "page ready" events (host
     side)

   - Hyper-V MSRs and hypercalls for guest debugging

   - VMX preemption timer fixes

  s390:
   - Cleanups

  Generic:
   - switch vCPU thread wakeup from swait to rcuwait

  The other architectures, and the guest side of the asynchronous page
  fault work, will come next week"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (256 commits)
  KVM: selftests: fix rdtsc() for vmx_tsc_adjust_test
  KVM: check userspace_addr for all memslots
  KVM: selftests: update hyperv_cpuid with SynDBG tests
  x86/kvm/hyper-v: Add support for synthetic debugger via hypercalls
  x86/kvm/hyper-v: enable hypercalls regardless of hypercall page
  x86/kvm/hyper-v: Add support for synthetic debugger interface
  x86/hyper-v: Add synthetic debugger definitions
  KVM: selftests: VMX preemption timer migration test
  KVM: nVMX: Fix VMX preemption timer migration
  x86/kvm/hyper-v: Explicitly align hcall param for kvm_hyperv_exit
  KVM: x86/pmu: Support full width counting
  KVM: x86/pmu: Tweak kvm_pmu_get_msr to pass 'struct msr_data' in
  KVM: x86: announce KVM_FEATURE_ASYNC_PF_INT
  KVM: x86: acknowledgment mechanism for async pf page ready notifications
  KVM: x86: interrupt based APF 'page ready' event delivery
  KVM: introduce kvm_read_guest_offset_cached()
  KVM: rename kvm_arch_can_inject_async_page_present() to kvm_arch_can_dequeue_async_page_present()
  KVM: x86: extend struct kvm_vcpu_pv_apf_data with token info
  Revert "KVM: async_pf: Fix #DF due to inject "Page not Present" and "Page Ready" exceptions simultaneously"
  KVM: VMX: Replace zero-length array with flexible-array
  ...
2020-06-03 15:13:47 -07:00
Linus Torvalds 6b2591c212 hyperv-next for 5.8
-----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCAAxFiEEIbPD0id6easf0xsudhRwX5BBoF4FAl7WhbkTHHdlaS5saXVA
 a2VybmVsLm9yZwAKCRB2FHBfkEGgXlUnB/0R8dBVSeRfNmyJaadBWKFc/LffwKLD
 CQ8PVv22ffkCaEYV2tpnhS6NmkERLNdson4Uo02tVUsjOJ4CrWHTn7aKqYWZyA+O
 qv/PiD9TBXJVYMVP2kkyaJlK5KoqeAWBr2kM16tT0cxQmlhE7g0Xo2wU9vhRbU+4
 i4F0jffe4lWps65TK392CsPr6UEv1HSel191Py5zLzYqChT+L8WfahmBt3chhsV5
 TIUJYQvBwxecFRla7yo+4sUn37ZfcTqD1hCWSr0zs4psW0ge7d80kuaNZS+EqxND
 fGm3Bp1BlUuDKsJ/D+AaHLCR47PUZ9t9iMDjZS/ovYglLFwi+h3tAV+W
 =LwVR
 -----END PGP SIGNATURE-----

Merge tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

Pull hyper-v updates from Wei Liu:

 - a series from Andrea to support channel reassignment

 - a series from Vitaly to clean up Vmbus message handling

 - a series from Michael to clean up and augment hyperv-tlfs.h

 - patches from Andy to clean up GUID usage in Hyper-V code

 - a few other misc patches

* tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: (29 commits)
  Drivers: hv: vmbus: Resolve more races involving init_vp_index()
  Drivers: hv: vmbus: Resolve race between init_vp_index() and CPU hotplug
  vmbus: Replace zero-length array with flexible-array
  Driver: hv: vmbus: drop a no long applicable comment
  hyper-v: Switch to use UUID types directly
  hyper-v: Replace open-coded variant of %*phN specifier
  hyper-v: Supply GUID pointer to printf() like functions
  hyper-v: Use UUID API for exporting the GUID (part 2)
  asm-generic/hyperv: Add definitions for Get/SetVpRegister hypercalls
  x86/hyperv: Split hyperv-tlfs.h into arch dependent and independent files
  x86/hyperv: Remove HV_PROCESSOR_POWER_STATE #defines
  KVM: x86: hyperv: Remove duplicate definitions of Reference TSC Page
  drivers: hv: remove redundant assignment to pointer primary_channel
  scsi: storvsc: Re-init stor_chns when a channel interrupt is re-assigned
  Drivers: hv: vmbus: Introduce the CHANNELMSG_MODIFYCHANNEL message type
  Drivers: hv: vmbus: Synchronize init_vp_index() vs. CPU hotplug
  Drivers: hv: vmbus: Remove the unused HV_LOCALIZED channel affinity logic
  PCI: hv: Prepare hv_compose_msi_msg() for the VMBus-channel-interrupt-to-vCPU reassignment functionality
  Drivers: hv: vmbus: Use a spin lock for synchronizing channel scheduling vs. channel removal
  hv_utils: Always execute the fcopy and vss callbacks in a tasklet
  ...
2020-06-03 15:00:05 -07:00
Linus Torvalds 8226f11318 MIPS updates for v5.8:
- added support for MIPSr5 and P5600 cores
 - converted Loongson PCI driver into a PCI host driver using the generic
   PCI framework
 - added emulation of CPUCFG command for Loogonson64 cpus
 - removed of LASAT, PMC MSP71xx and NEC MARKEINS/EMMA
 - ioremap cleanup
 - fix for a race between two threads faulting the same page
 - various cleanups and fixes
 -----BEGIN PGP SIGNATURE-----
 
 iQJOBAABCAA4FiEEbt46xwy6kEcDOXoUeZbBVTGwZHAFAl7WK54aHHRzYm9nZW5k
 QGFscGhhLmZyYW5rZW4uZGUACgkQeZbBVTGwZHAbjA/9EEFeqNg9UNUH6/TS18QV
 qkxKp0+LC4Jk+SduzLyYsYy6l/dSaKYl8m9jyJsWjM6BvBZTcMJJOnzIPRafI0s+
 MK8GCSZunAkm25DsDvfobQUkbQ/UHjY/fuRpNslbDcsYqIKv90hUMd21ccXY6KC5
 RY+aMlpjgksg1X8JJ7k1Rs05sXyUPqpESteyqehF1b/+Iyv7H2L3v5EvQwvPDs6f
 TyVgNJU2B3RCU6/uAcWmHdVLxXd+Y8fM0vC8DCO0pg0rGf4be0FbZztHmeq6r2wy
 g7wsO7acKWGzulFQD5ftVSQ6i8KHIDNDePmDMtU5oFcXkzUDdGvd3j3Gst19/nve
 ZftNmQHOY1JqGUOhdq1fDG/4M3Vc5bvh3W6eMG22TuMLEWsOF8teY8uUa/vxOb+B
 2NsJ9q6ylRS7RDWWOrApJWfFYPvhr5wlLxT+azWNa9y3bjV8vDLjNdU0mRLA1nsu
 yLzYMwIhtWfZhkJZ+xJVSmQ6LjAHDN5TF/LEx/9itLg5t9wrEosFPAtOv8V15hy4
 KBNvvWeoy7RRmBTNuKh7r9Ui4jw7GgxL4D1OwzCsF//GAiGyuuh0zMuUE8EXA6K5
 MpdGt+bSOcLl8ILTtGir8e4MXLawDH8n94f8QWLb9FcOvU4KHUjRKU7EQ6dyD5dk
 a7xskGLXWdVO3IJ/Xvxcaeo=
 =eAtN
 -----END PGP SIGNATURE-----

Merge tag 'mips_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS updates from Thomas Bogendoerfer:

 - added support for MIPSr5 and P5600 cores

 - converted Loongson PCI driver into a PCI host driver using the
   generic PCI framework

 - added emulation of CPUCFG command for Loogonson64 cpus

 - removed of LASAT, PMC MSP71xx and NEC MARKEINS/EMMA

 - ioremap cleanup

 - fix for a race between two threads faulting the same page

 - various cleanups and fixes

* tag 'mips_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (143 commits)
  MIPS: ralink: drop ralink_clk_init for mt7621
  MIPS: ralink: bootrom: mark a function as __init to save some memory
  MIPS: Loongson64: Reorder CPUCFG model match arms
  MIPS: Expose Loongson CPUCFG availability via HWCAP
  MIPS: Loongson64: Guard against future cores without CPUCFG
  MIPS: Fix build warning about "PTR_STR" redefinition
  MIPS: Loongson64: Remove not used pci.c
  MIPS: Loongson64: Define PCI_IOBASE
  MIPS: CPU_LOONGSON2EF need software to maintain cache consistency
  MIPS: DTS: Fix build errors used with various configs
  MIPS: Loongson64: select NO_EXCEPT_FILL
  MIPS: Fix IRQ tracing when call handle_fpe() and handle_msa_fpe()
  MIPS: mm: add page valid judgement in function pte_modify
  mm/memory.c: Add memory read privilege on page fault handling
  mm/memory.c: Update local TLB if PTE entry exists
  MIPS: Do not flush tlb page when updating PTE entry
  MIPS: ingenic: Default to a generic board
  MIPS: ingenic: Add support for GCW Zero prototype
  MIPS: ingenic: DTS: Add memory info of GCW Zero
  MIPS: Loongson64: Switch to generic PCI driver
  ...
2020-06-03 13:32:21 -07:00
Linus Torvalds 94709049fb Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton:
 "A few little subsystems and a start of a lot of MM patches.

  Subsystems affected by this patch series: squashfs, ocfs2, parisc,
  vfs. With mm subsystems: slab-generic, slub, debug, pagecache, gup,
  swap, memcg, pagemap, memory-failure, vmalloc, kasan"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (128 commits)
  kasan: move kasan_report() into report.c
  mm/mm_init.c: report kasan-tag information stored in page->flags
  ubsan: entirely disable alignment checks under UBSAN_TRAP
  kasan: fix clang compilation warning due to stack protector
  x86/mm: remove vmalloc faulting
  mm: remove vmalloc_sync_(un)mappings()
  x86/mm/32: implement arch_sync_kernel_mappings()
  x86/mm/64: implement arch_sync_kernel_mappings()
  mm/ioremap: track which page-table levels were modified
  mm/vmalloc: track which page-table levels were modified
  mm: add functions to track page directory modifications
  s390: use __vmalloc_node in stack_alloc
  powerpc: use __vmalloc_node in alloc_vm_stack
  arm64: use __vmalloc_node in arch_alloc_vmap_stack
  mm: remove vmalloc_user_node_flags
  mm: switch the test_vmalloc module to use __vmalloc_node
  mm: remove __vmalloc_node_flags_caller
  mm: remove both instances of __vmalloc_node_flags
  mm: remove the prot argument to __vmalloc_node
  mm: remove the pgprot argument to __vmalloc
  ...
2020-06-02 12:21:36 -07:00
Joerg Roedel d862613800 mm: add functions to track page directory modifications
Patch series "mm: Get rid of vmalloc_sync_(un)mappings()", v3.

After the recent issue with vmalloc and tracing code[1] on x86 and a
long history of previous issues related to the vmalloc_sync_mappings()
interface, I thought the time has come to remove it.  Please see [2],
[3], and [4] for some other issues in the past.

The patches add tracking of page-table directory changes to the vmalloc
and ioremap code.  Depending on which page-table levels changes have
been made, a new per-arch function is called:
arch_sync_kernel_mappings().

On x86-64 with 4-level paging, this function will not be called more
than 64 times in a systems runtime (because vmalloc-space takes 64 PGD
entries which are only populated, but never cleared).

As a side effect this also allows to get rid of vmalloc faults on x86,
making it safe to touch vmalloc'ed memory in the page-fault handler.
Note that this potentially includes per-cpu memory.

This patch (of 7):

Add page-table allocation functions which will keep track of changed
directory entries.  They are needed for new PGD, P4D, PUD, and PMD
entries and will be used in vmalloc and ioremap code to decide whether
any changes in the kernel mappings need to be synchronized between
page-tables in the system.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20200515140023.25469-1-joro@8bytes.org
Link: http://lkml.kernel.org/r/20200515140023.25469-2-joro@8bytes.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-02 10:59:11 -07:00
Christoph Hellwig cca98e9f8b mm: enforce that vmap can't map pages executable
To help enforcing the W^X protection don't allow remapping existing pages
as executable.

x86 bits from Peter Zijlstra, arm64 bits from Mark Rutland.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Mark Rutland <mark.rutland@arm.com>.
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Gao Xiang <xiang@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Michael Kelley <mikelley@microsoft.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Link: http://lkml.kernel.org/r/20200414131348.444715-20-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-02 10:59:11 -07:00
Linus Torvalds 4b01285e16 Merge branch 'uaccess.csum' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull uaccess/csum updates from Al Viro:
 "Regularize the sitation with uaccess checksum primitives:

   - fold csum_partial_... into csum_and_copy_..._user()

   - on x86 collapse several access_ok()/stac()/clac() into
     user_access_begin()/user_access_end()"

* 'uaccess.csum' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  default csum_and_copy_to_user(): don't bother with access_ok()
  take the dummy csum_and_copy_from_user() into net/checksum.h
  arm: switch to csum_and_copy_from_user()
  sh32: convert to csum_and_copy_from_user()
  m68k: convert to csum_and_copy_from_user()
  xtensa: switch to providing csum_and_copy_from_user()
  sparc: switch to providing csum_and_copy_from_user()
  parisc: turn csum_partial_copy_from_user() into csum_and_copy_from_user()
  alpha: turn csum_partial_copy_from_user() into csum_and_copy_from_user()
  ia64: turn csum_partial_copy_from_user() into csum_and_copy_from_user()
  ia64: csum_partial_copy_nocheck(): don't abuse csum_partial_copy_from_user()
  x86: switch 32bit csum_and_copy_to_user() to user_access_{begin,end}()
  x86: switch both 32bit and 64bit to providing csum_and_copy_from_user()
  x86_64: csum_..._copy_..._user(): switch to unsafe_..._user()
  get rid of csum_partial_copy_to_user()
2020-06-01 16:03:37 -07:00
Linus Torvalds 0bd957eb11 Various kprobes updates, mostly centered around cleaning up the no-instrumentation
logic, instead of the current per debug facility blacklist, use the more generic
 .noinstr.text approach, combined with a 'noinstr' marker for functions.
 
 Also add instrumentation_begin()/end() to better manage the exact place in entry
 code where instrumentation may be used.
 
 Also add a kprobes blacklist for modules.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAl7U/KERHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1h6xg//bnWhJzrxlOr89d7c5pEUeZehTscZ4OxU
 HyiWnfgd6bHJGHiB8TRHZInJFys/Y0UG+xzQvCP2YCIHW42tguD3u0wQ1rOrA6im
 VkDxUwHn72avqnBq+knMwtqiKQjxJrPe+YpikWOgb4B+9jQwLARzTArhs+aoWBRn
 a9jRP1jcuS26F/9wxctFoHVvKZ7Vv+HCgtNzequHsd1e0J8ElvDRk+QkfkaZopl5
 cQ44TIfzR8xjJuGqW45hXwOw5PPjhZHwytSoFquSMb57txoWL2devn7S38VaCWv7
 /fqmQAnQqlW5eG5ipJ0zWY1n0uLZLRrIecfA1INY8fdJeFFr6cxaN6FM1GhVZ93I
 GjZZFYwxDv9IftpeSyCaIzF1zISV+as3r9sMKMt89us77XazRiobjWCi1aE9a1rX
 QRv1nTjmypWg65IMV+nfIT26riP6YXSZ3uXQJPwm+kzEjJJl0LSi2AfjWQadcHeZ
 Z8svSIepP4oJBJ9tJlZ3K7kHBV3E0G4SV3fnHaUYGrp9gheqhe33U0VWfILcvq7T
 zIhtZXzqRGaMKuw0IFy2xITCQyEZAXwTedtSSeyXt0CN/hwhaxbrd38HhKOBw8WH
 k+OAmXZ+lgSO5ZvkoxgV6QgHtjsif3ICcHNelJtcbRA80/3oj/QwJ5dAVR61EDZa
 3Jn8mMxvCn0=
 =25Vr
 -----END PGP SIGNATURE-----

Merge tag 'core-kprobes-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull kprobes updates from Ingo Molnar:
 "Various kprobes updates, mostly centered around cleaning up the
  no-instrumentation logic.

  Instead of the current per debug facility blacklist, use the more
  generic .noinstr.text approach, combined with a 'noinstr' marker for
  functions.

  Also add instrumentation_begin()/end() to better manage the exact
  place in entry code where instrumentation may be used.

  And add a kprobes blacklist for modules"

* tag 'core-kprobes-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  kprobes: Prevent probes in .noinstr.text section
  vmlinux.lds.h: Create section for protection against instrumentation
  samples/kprobes: Add __kprobes and NOKPROBE_SYMBOL() for handlers.
  kprobes: Support NOKPROBE_SYMBOL() in modules
  kprobes: Support __kprobes blacklist in modules
  kprobes: Lock kprobe_mutex while showing kprobe_blacklist
2020-06-01 12:45:04 -07:00
Al Viro 5904122c46 take the dummy csum_and_copy_from_user() into net/checksum.h
now that can be done conveniently - all non-trivial cases have
_HAVE_ARCH_COPY_AND_CSUM_FROM_USER defined, so the fallback in
net/checksum.h is used only for dummy (copy_from_user, then
csum_partial) implementation.  Allowing us to get rid of all
dummy instances, both of csum_and_copy_from_user() and
csum_partial_copy_from_user().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-05-29 16:11:50 -04:00
Arnd Bergmann 4377748c7b include/asm-generic/topology.h: guard cpumask_of_node() macro argument
drivers/hwmon/amd_energy.c:195:15: error: invalid operands to binary expression ('void' and 'int')
                                        (channel - data->nr_cpus));
                                        ~~~~~~~~~^~~~~~~~~~~~~~~~~
include/asm-generic/topology.h:51:42: note: expanded from macro 'cpumask_of_node'
    #define cpumask_of_node(node)       ((void)node, cpu_online_mask)
                                               ^~~~
include/linux/cpumask.h:618:72: note: expanded from macro 'cpumask_first_and'
 #define cpumask_first_and(src1p, src2p) cpumask_next_and(-1, (src1p), (src2p))
                                                                       ^~~~~

Fixes: f0b848ce6f ("cpumask: Introduce cpumask_of_{node,pcibus} to replace {node,pcibus}_to_cpumask")
Fixes: 8abee9566b ("hwmon: Add amd_energy driver to report energy counters")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Link: http://lkml.kernel.org/r/20200527134623.930247-1-arnd@arndb.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-28 11:35:41 -07:00
Bibo Mao 44bf431b47 mm/memory.c: Add memory read privilege on page fault handling
Here add pte_sw_mkyoung function to make page readable on MIPS
platform during page fault handling. This patch improves page
fault latency about 10% on my MIPS machine with lmbench
lat_pagefault case.

It is noop function on other arches, there is no negative
influence on those architectures.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-05-27 13:06:40 +02:00
Bibo Mao 7df6769743 mm/memory.c: Update local TLB if PTE entry exists
If two threads concurrently fault at the same page, the thread that
won the race updates the PTE and its local TLB. For now, the other
thread gives up, simply does nothing, and continues.

It could happen that this second thread triggers another fault, whereby
it only updates its local TLB while handling the fault. Instead of
triggering another fault, let's directly update the local TLB of the
second thread. Function update_mmu_tlb is used here to update local
TLB on the second thread, and it is defined as empty on other arches.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-05-27 13:06:09 +02:00
Arnd Bergmann e1d908a761 ARM64: hisi: SoC driver updates for 5.8
- Generate consistent behaviour for logic_pio by defining and using
   generic _inX() and _outX() in asm-generic/io.h which have per-arch
   overrideable barriers.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJevjd1AAoJEAvIV27ZiWZcyoUQAIDN4NeFM7lIpjDCNgS3P7W6
 WG+5EP/BHdnnCBarRYqaZR2B2pnwiTkHKMkDpe8aoaE51udT9bJA8dp162V2eEy0
 j/0rOOxR14k2Nj+BoNpsHbJllPQLVPkXehOpwsUhm1qGiE5w8nwZ4iG/BaW97Nbj
 TcPYnesviuRf1ghNLNyjYmkuT2zou7shJqCpKHt58o+O3S3RT7c+fbbfBy+DVSmx
 3yBersTVOklHQIqCuGPFzy/+qtMQh1iAiRVefkrYG/WOyare4Rc8DZfs0hf8Ljdr
 AJdIGBB/12H+jPUn3wdpdi0vrJ6ClUaacRvGz3Ba30eMDRFsH9ZStwWZXIO8Zoz9
 wl7kOFwX8UaHO881jvF/LTSYm+7cs/FfCV4MLCHQBx2zepxxQwM3/LAvV5zgVUA0
 ZUqgUVeEOTS/WTEE8420oHtL7p/zidG1K1cZSZoh727xoBsC9r5aGw14ceLK+Y9j
 FknxIhqITdO9BRp5vkBgQwBMDDK5SkBFdB3ZT2oZkXYzJzFxD2BHQAsFNcR7oaio
 zyQVPL7RdK40EN/WASF69m/SB4uefPPxvvSUvP77ucjMdvF006CPE+H8oS+OWZPr
 HUhp0rLZNP3bgYv2R4Ln+1CzOS8Llfb8o+tqg/C0qWFp5kadW6469xitkvlppBJA
 uBLmjjElHLg4mWG9vhvf
 =kbAg
 -----END PGP SIGNATURE-----

Merge tag 'hisi-drivers-for-5.8' of git://github.com/hisilicon/linux-hisi into arm/drivers

ARM64: hisi: SoC driver updates for 5.8

- Generate consistent behaviour for logic_pio by defining and using
  generic _inX() and _outX() in asm-generic/io.h which have per-arch
  overrideable barriers.

* tag 'hisi-drivers-for-5.8' of git://github.com/hisilicon/linux-hisi:
  logic_pio: Use _inX() and _outX()
  logic_pio: Improve macro argument name
  io: Provide _inX() and _outX()
2020-05-26 00:32:10 +02:00
Michael Kelley 88b42da6e3 asm-generic/hyperv: Add definitions for Get/SetVpRegister hypercalls
Add definitions for GetVpRegister and SetVpRegister hypercalls, which
are implemented for both x86 and ARM64.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20200422195737.10223-5-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2020-05-20 09:13:58 +00:00
Michael Kelley c55a844f46 x86/hyperv: Split hyperv-tlfs.h into arch dependent and independent files
In preparation for adding ARM64 support, split hyperv-tlfs.h into
architecture dependent and architecture independent files, similar
to what has been done with mshyperv.h. Move architecture independent
definitions into include/asm-generic/hyperv-tlfs.h.  The split will
avoid duplicating significant lines of code in the ARM64 version of
hyperv-tlfs.h.  The split has no functional impact.

Some of the common definitions have "X64" in the symbol name.  Change
these to remove the "X64" in the architecture independent version of
hyperv-tlfs.h, but add aliases with the "X64" in the x86 version so
that x86 code will continue to compile.  A later patch set will
change all the references and allow removal of the aliases.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20200422195737.10223-4-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2020-05-20 09:13:58 +00:00
Thomas Gleixner 6553896666 vmlinux.lds.h: Create section for protection against instrumentation
Some code pathes, especially the low level entry code, must be protected
against instrumentation for various reasons:

 - Low level entry code can be a fragile beast, especially on x86.

 - With NO_HZ_FULL RCU state needs to be established before using it.

Having a dedicated section for such code allows to validate with tooling
that no unsafe functions are invoked.

Add the .noinstr.text section and the noinstr attribute to mark
functions. noinstr implies notrace. Kprobes will gain a section check
later.

Provide also a set of markers: instrumentation_begin()/end()

These are used to mark code inside a noinstr function which calls
into regular instrumentable text section as safe.

The instrumentation markers are only active when CONFIG_DEBUG_ENTRY is
enabled as the end marker emits a NOP to prevent the compiler from merging
the annotation points. This means the objtool verification requires a
kernel compiled with this option.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200505134100.075416272@linutronix.de
2020-05-19 15:47:20 +02:00
John Garry f009c89df7 io: Provide _inX() and _outX()
Since commit a7851aa54c ("io: change outX() to have their own IO barrier
overrides") and commit 87fe2d543f ("io: change inX() to have their own
IO barrier overrides"), the outX and inX functions have memory barriers
which can be overridden.

However, the generic logic_pio lib has continued to use readl/writel et al
for IO port accesses, which has weaker barriers on arm64.

Provide generic _inX() and _outX(), which can be used by logic pio.

For consistency, we check for !defined({in,out}X) && !defined(_{in,out}X),
for defining _{in,out}X, while a check for just !defined({in,out}X) should
suffice.

Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
2020-05-07 14:54:18 +08:00
Aneesh Kumar K.V 93a98695f2 mm: change pmdp_huge_get_and_clear_full take vm_area_struct as arg
We will use this in later patch to do tlb flush when clearing pmd entries.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200505071729.54912-22-aneesh.kumar@linux.ibm.com
2020-05-05 21:20:13 +10:00
Masahiro Yamada 62d0fd591d arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h>
As the bug report [1] pointed out, <linux/vermagic.h> must be included
after <linux/module.h>.

I believe we should not impose any include order restriction. We often
sort include directives alphabetically, but it is just coding style
convention. Technically, we can include header files in any order by
making every header self-contained.

Currently, arch-specific MODULE_ARCH_VERMAGIC is defined in
<asm/module.h>, which is not included from <linux/vermagic.h>.

Hence, the straight-forward fix-up would be as follows:

|--- a/include/linux/vermagic.h
|+++ b/include/linux/vermagic.h
|@@ -1,5 +1,6 @@
| /* SPDX-License-Identifier: GPL-2.0 */
| #include <generated/utsrelease.h>
|+#include <linux/module.h>
|
| /* Simply sanity version stamp for modules. */
| #ifdef CONFIG_SMP

This works enough, but for further cleanups, I split MODULE_ARCH_VERMAGIC
definitions into <asm/vermagic.h>.

With this, <linux/module.h> and <linux/vermagic.h> will be orthogonal,
and the location of MODULE_ARCH_VERMAGIC definitions will be consistent.

For arc and ia64, MODULE_PROC_FAMILY is only used for defining
MODULE_ARCH_VERMAGIC. I squashed it.

For hexagon, nds32, and xtensa, I removed <asm/modules.h> entirely
because they contained nothing but MODULE_ARCH_VERMAGIC definition.
Kbuild will automatically generate <asm/modules.h> at build-time,
wrapping <asm-generic/module.h>.

[1] https://lore.kernel.org/lkml/20200411155623.GA22175@zn.tnic

Reported-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Jessica Yu <jeyu@kernel.org>
2020-04-23 10:50:26 +09:00
Will Deacon 549887271a locking/barriers: Use '__unqual_scalar_typeof' for load-acquire macros
Passing volatile-qualified pointers to the asm-generic implementations of
the load-acquire macros results in a re-load from the stack due to the
temporary result variable inheriting the volatile semantics thanks to the
use of 'typeof()'.

Define these temporary variables using 'unqual_scalar_typeof' to drop
the volatile qualifier in the case that they are scalar types.

Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Will Deacon <will@kernel.org>
2020-04-16 12:28:34 +01:00
Linus Torvalds 8632e9b564 hyperv-fixes for 5.7-rc1
-----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCAAxFiEEIbPD0id6easf0xsudhRwX5BBoF4FAl6ViNsTHHdlaS5saXVA
 a2VybmVsLm9yZwAKCRB2FHBfkEGgXuXIB/4nuYRCt4d/XaeHF6dCWU45ThG+tNs7
 p/OnBPZmknI0SnZ4uR/XW5caHEFj7g9ndYh+M1afZ/zKdsc+syMSDT5XhuhC/GKV
 fQRW0qO8N+IAqXbLzJxyBg6fH2anwfe3w2uy2cKDEZk6d4FD5atTWhRY6R4ISq0l
 g7pUyvQN1q+G6KH2snmOaZL8mybFkbHrmwtAZzcjzdzqasdLFiQB8EEFkONG66t9
 HeNTyUF0mnbGBIePQLSZSHLj5p4yHG/9pa3jgqO5dsmIdsBvoaVNqEi3pCm1s/5n
 BH9FWn6fTwpcKvtF385yzBiFFlzBVgXbetxuSmxxOkWW4P+db5B/GL2Y
 =fjSF
 -----END PGP SIGNATURE-----

Merge tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

Pull hyperv fixes from Wei Liu:

 - a series from Tianyu Lan to fix crash reporting on Hyper-V

 - three miscellaneous cleanup patches

* tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  x86/Hyper-V: Report crash data in die() when panic_on_oops is set
  x86/Hyper-V: Report crash register data when sysctl_record_panic_msg is not set
  x86/Hyper-V: Report crash register data or kmsg before running crash kernel
  x86/Hyper-V: Trigger crash enlightenment only once during system crash.
  x86/Hyper-V: Free hv_panic_page when fail to register kmsg dump
  x86/Hyper-V: Unload vmbus channel in hv panic callback
  x86: hyperv: report value of misc_features
  hv_debugfs: Make hv_debug_root static
  hv: hyperv_vmbus.h: Replace zero-length array with flexible-array member
2020-04-14 11:58:04 -07:00
Ingo Molnar 3b02a051d2 Linux 5.7-rc1
-----BEGIN PGP SIGNATURE-----
 
 iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAl6TbaUeHHRvcnZhbGRz
 QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGhgkH/iWpiKvosA20HJjC
 rBqYeJPxQsgZTuBieWJ+MeVxbpcF7RlM4c+glyvg3QJhHwIEG58dl6LBrQbAyBAR
 aFHNojr1iAYOruVCGnU3pA008YZiwUIDv/ZQ4DF8fmIU2vI2mJ6qHBv3XDl4G2uR
 Nwz8Eu9AgIwZM5coomVOSmoWyFy7Vxmb7W+3t5VmKsvOWx4ib9kyQtOIkvQDEl7j
 XCbWfI0xDQr6LFOm4jnCi5R/LhJ2LIqqIvHHrunbpszM8IwK797jCXz4im+dmd5Y
 +km46N7a8pDqri36xXz1gdBAU3eG7Pt1NyvfjwRVTdX4GquQ2MT0GoojxbLxUP3y
 3pEsQuE=
 =whbL
 -----END PGP SIGNATURE-----

Merge tag 'v5.7-rc1' into locking/kcsan, to resolve conflicts and refresh

Resolve these conflicts:

	arch/x86/Kconfig
	arch/x86/kernel/Makefile

Do a minor "evil merge" to move the KCSAN entry up a bit by a few lines
in the Kconfig to reduce the probability of future conflicts.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-04-13 09:44:39 +02:00
Tianyu Lan f3a99e761e x86/Hyper-V: Report crash data in die() when panic_on_oops is set
When oops happens with panic_on_oops unset, the oops
thread is killed by die() and system continues to run.
In such case, guest should not report crash register
data to host since system still runs. Check panic_on_oops
and return directly in hyperv_report_panic() when the function
is called in the die() and panic_on_oops is unset. Fix it.

Fixes: 7ed4325a44 ("Drivers: hv: vmbus: Make panic reporting to be more useful")
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20200406155331.2105-7-Tianyu.Lan@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2020-04-11 17:19:07 +01:00
Peter Xu 2e3d5dc508 userfaultfd: wp: add pmd_swp_*uffd_wp() helpers
Adding these missing helpers for uffd-wp operations with pmd
swap/migration entries.

Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Bobby Powers <bobbypowers@gmail.com>
Cc: Brian Geffon <bgeffon@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Denis Plotnikov <dplotnikov@virtuozzo.com>
Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Kirill A . Shutemov" <kirill@shutemov.name>
Cc: Martin Cracauer <cracauer@cons.org>
Cc: Marty McFadden <mcfadden8@llnl.gov>
Cc: Maya Gokhale <gokhale2@llnl.gov>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Shaohua Li <shli@fb.com>
Link: http://lkml.kernel.org/r/20200220163112.11409-10-peterx@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-07 10:43:39 -07:00
Andrea Arcangeli 5a281062af userfaultfd: wp: add WP pagetable tracking to x86
Accurate userfaultfd WP tracking is possible by tracking exactly which
virtual memory ranges were writeprotected by userland.  We can't relay
only on the RW bit of the mapped pagetable because that information is
destroyed by fork() or KSM or swap.  If we were to relay on that, we'd
need to stay on the safe side and generate false positive wp faults for
every swapped out page.

[peterx@redhat.com: append _PAGE_UFD_WP to _PAGE_CHG_MASK]
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Bobby Powers <bobbypowers@gmail.com>
Cc: Brian Geffon <bgeffon@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Denis Plotnikov <dplotnikov@virtuozzo.com>
Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Kirill A . Shutemov" <kirill@shutemov.name>
Cc: Martin Cracauer <cracauer@cons.org>
Cc: Marty McFadden <mcfadden8@llnl.gov>
Cc: Maya Gokhale <gokhale2@llnl.gov>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Shaohua Li <shli@fb.com>
Link: http://lkml.kernel.org/r/20200220163112.11409-4-peterx@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-07 10:43:39 -07:00
Anshuman Khandual 03911132aa mm/vma: replace all remaining open encodings with is_vm_hugetlb_page()
This replaces all remaining open encodings with is_vm_hugetlb_page().

Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Will Deacon <will@kernel.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Nick Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Rich Felker <dalias@libc.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/1582520593-30704-4-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-07 10:43:37 -07:00
Linus Torvalds 828907ef25 This is the bulk of GPIO development for the v5.7 kernel cycle.
Core and userspace API:
 
 - The userspace API KFIFOs have been imoproved with locks that
   do not block interrupts. This makes us better at getting
   events to userspace without blocking or disturbing new events
   arriving in the same time. This was reviewed by the KFIFO
   maintainer Stefani. This is a generic improvement which
   paves the road for similar improvements in other subsystems.
 
 - We provide a new ioctl() for monitoring changes in the line
   information, such as when multiple clients are taking lines
   and giving them back, possibly reconfiguring them in the
   process: we can now monitor that and not get stuck with stale
   static information.
 
 - An example tool 'gpio-watch' is provided to showcase this
   functionality.
 
 - Timestamps for events are switched to ktime_get_ns() which is
   monotonic. We previously had a 'realtime' stamp which could
   move forward and *backward* in time, which probably would just
   cause silent bugs and weird behaviour. In the long run we
   see two relevant timestamps: ktime_get_ns() or the timestamp
   sometimes provided by the GPIO hardware itself, if that
   exists.
 
 - Device Tree overlay support for GPIO hogs. On systems that
   load overlays, these overlays can now contain hogs, and will
   then be respected.
 
 - Handle pin control interaction with nonexisting pin ranges
   in the GPIO library core instead of in the individual
   drivers.
 
 New drivers:
 
 - New driver for the Mellanox BlueField 2 GPIO controller.
 
 Driver improvements:
 
 - Introduce the BGPIOF_NO_SET_ON_INPUT flag to the generic
   MMIO GPIO library and use this flag in the MT7621 driver.
 
 - Texas Instruments OMAP CPU power management improvements,
   such as blocking of idle on pending GPIO interrupts.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEElDRnuGcz/wPCXQWMQRCzN7AZXXMFAl6IWUAACgkQQRCzN7AZ
 XXPReQ//WUHALqbLOL/DZR8kVyygVZXV8JC4jcuMQgX+Mvm1DQuGp1T8VPlG1wC7
 vy5eTz3oPc+jAaHGQgGiSGdPRQtDkAW5+Wo4hzcHJ5ATlzT7cgNywK3Jk6+YlPlF
 CuhHB6aPEymQ45/GseUwEb5AuWWKS03P3XdOBj2IdDhuRHRfyjHi+31s0lh6bfNs
 kC2eP+VtddVqLbOdPE1GKjZi+Iq9ffFRmiNTduHbl3o6ZoE6WnMvn2wsC6zPpJr4
 AM8zpj9JFUq1DYaQf8bJJLTm8lItcyyUUhq8oKUxBpecjWfhUYwEYHGxqWIk9fbM
 oyJ3zBlU0G7bc4gu1VG3cTacUf//BTmQG3iZNSSw9w17I1hOMX9wNJan22VkEbJD
 8X+6AcgkldNwnAVWcVgg1lkfgdxlWURMYXl1uQPQZSj2SQL6gFcdkAhKwlgl8jOi
 RctUfZ69tD+4ul2b+MhL6BtIk16o2RIBJF53ESxrR4qftRZ3ywW4JQ/AwNoQalxM
 Xg8U3axFm8kitOzemVoXGr/AIee9KpcA4NK8yQLEPmSFgBaVzaVlP9Q7Klr7QGXg
 RvK45uRULrWnvSyoVY7Ox+ie1NiG8JAbaxKBxkV8n+z+gVMh82xcyQX+5SgWxwW0
 dzeEx1B0mCW4WDAK29CcdQVE6m4K2u/fabhZq5IhgS1mQoTC894=
 =EFm/
 -----END PGP SIGNATURE-----

Merge tag 'gpio-v5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO development for the v5.7 kernel cycle.

  Core and userspace API:

   - The userspace API KFIFOs have been imoproved with locks that do not
     block interrupts. This makes us better at getting events to
     userspace without blocking or disturbing new events arriving in the
     same time. This was reviewed by the KFIFO maintainer Stefani. This
     is a generic improvement which paves the road for similar
     improvements in other subsystems.

   - We provide a new ioctl() for monitoring changes in the line
     information, such as when multiple clients are taking lines and
     giving them back, possibly reconfiguring them in the process: we
     can now monitor that and not get stuck with stale static
     information.

   - An example tool 'gpio-watch' is provided to showcase this
     functionality.

   - Timestamps for events are switched to ktime_get_ns() which is
     monotonic. We previously had a 'realtime' stamp which could move
     forward and *backward* in time, which probably would just cause
     silent bugs and weird behaviour. In the long run we see two
     relevant timestamps: ktime_get_ns() or the timestamp sometimes
     provided by the GPIO hardware itself, if that exists.

   - Device Tree overlay support for GPIO hogs. On systems that load
     overlays, these overlays can now contain hogs, and will then be
     respected.

   - Handle pin control interaction with nonexisting pin ranges in the
     GPIO library core instead of in the individual drivers.

  New drivers:

   - New driver for the Mellanox BlueField 2 GPIO controller.

  Driver improvements:

   - Introduce the BGPIOF_NO_SET_ON_INPUT flag to the generic MMIO GPIO
     library and use this flag in the MT7621 driver.

   - Texas Instruments OMAP CPU power management improvements, such as
     blocking of idle on pending GPIO interrupts"

* tag 'gpio-v5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (59 commits)
  Revert "gpio: eic-sprd: Use devm_platform_ioremap_resource()"
  pinctrl: Unconditionally assign .request()/.free()
  gpio: Unconditionally assign .request()/.free()
  gpio: export of_pinctrl_get to modules
  pinctrl: Define of_pinctrl_get() dummy for !PINCTRL
  gpio: Rename variable in core APIs
  gpio: Avoid using pin ranges with !PINCTRL
  gpiolib: Remove unused gpio_chip parameter from gpio_set_bias()
  gpiolib: Pass gpio_desc to gpio_set_config()
  gpiolib: Introduce gpiod_set_config()
  tools: gpio: Fix out-of-tree build regression
  gpio: gpiolib: fix a doc warning
  gpio: tegra186: Add Tegra194 pin ranges for GG.0 and GG.1
  gpio: tegra186: Add support for pin ranges
  gpio: Support GPIO controllers without pin-ranges
  ARM: integrator: impd1: Use GPIO_LOOKUP() helper macro
  gpio: brcmstb: support gpio-line-names property
  tools: gpio: Fix typo in gpio-utils
  tools: gpio-hammer: Apply scripts/Lindent and retain good changes
  gpiolib: gpio_name_to_desc: factor out !name check
  ...
2020-04-04 10:27:00 -07:00
Masahiro Yamada 630f289b71 asm-generic: make more kernel-space headers mandatory
Change a header to mandatory-y if both of the following are met:

[1] At least one architecture (except um) specifies it as generic-y in
    arch/*/include/asm/Kbuild

[2] Every architecture (except um) either has its own implementation
    (arch/*/include/asm/*.h) or specifies it as generic-y in
    arch/*/include/asm/Kbuild

This commit was generated by the following shell script.

----------------------------------->8-----------------------------------

arches=$(cd arch; ls -1 | sed -e '/Kconfig/d' -e '/um/d')

tmpfile=$(mktemp)

grep "^mandatory-y +=" include/asm-generic/Kbuild > $tmpfile

find arch -path 'arch/*/include/asm/Kbuild' |
	xargs sed -n 's/^generic-y += \(.*\)/\1/p' | sort -u |
while read header
do
	mandatory=yes

	for arch in $arches
	do
		if ! grep -q "generic-y += $header" arch/$arch/include/asm/Kbuild &&
			! [ -f arch/$arch/include/asm/$header ]; then
			mandatory=no
			break
		fi
	done

	if [ "$mandatory" = yes ]; then
		echo "mandatory-y += $header" >> $tmpfile

		for arch in $arches
		do
			sed -i "/generic-y += $header/d" arch/$arch/include/asm/Kbuild
		done
	fi

done

sed -i '/^mandatory-y +=/d' include/asm-generic/Kbuild

LANG=C sort $tmpfile >> include/asm-generic/Kbuild

----------------------------------->8-----------------------------------

One obvious benefit is the diff stat:

 25 files changed, 52 insertions(+), 557 deletions(-)

It is tedious to list generic-y for each arch that needs it.

So, mandatory-y works like a fallback default (by just wrapping
asm-generic one) when arch does not have a specific header
implementation.

See the following commits:

def3f7cefe
a1b39bae16

It is tedious to convert headers one by one, so I processed by a shell
script.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: http://lkml.kernel.org/r/20200210175452.5030-1-masahiroy@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-02 09:35:25 -07:00
Linus Torvalds 29d9f30d4c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from David Miller:
 "Highlights:

   1) Fix the iwlwifi regression, from Johannes Berg.

   2) Support BSS coloring and 802.11 encapsulation offloading in
      hardware, from John Crispin.

   3) Fix some potential Spectre issues in qtnfmac, from Sergey
      Matyukevich.

   4) Add TTL decrement action to openvswitch, from Matteo Croce.

   5) Allow paralleization through flow_action setup by not taking the
      RTNL mutex, from Vlad Buslov.

   6) A lot of zero-length array to flexible-array conversions, from
      Gustavo A. R. Silva.

   7) Align XDP statistics names across several drivers for consistency,
      from Lorenzo Bianconi.

   8) Add various pieces of infrastructure for offloading conntrack, and
      make use of it in mlx5 driver, from Paul Blakey.

   9) Allow using listening sockets in BPF sockmap, from Jakub Sitnicki.

  10) Lots of parallelization improvements during configuration changes
      in mlxsw driver, from Ido Schimmel.

  11) Add support to devlink for generic packet traps, which report
      packets dropped during ACL processing. And use them in mlxsw
      driver. From Jiri Pirko.

  12) Support bcmgenet on ACPI, from Jeremy Linton.

  13) Make BPF compatible with RT, from Thomas Gleixnet, Alexei
      Starovoitov, and your's truly.

  14) Support XDP meta-data in virtio_net, from Yuya Kusakabe.

  15) Fix sysfs permissions when network devices change namespaces, from
      Christian Brauner.

  16) Add a flags element to ethtool_ops so that drivers can more simply
      indicate which coalescing parameters they actually support, and
      therefore the generic layer can validate the user's ethtool
      request. Use this in all drivers, from Jakub Kicinski.

  17) Offload FIFO qdisc in mlxsw, from Petr Machata.

  18) Support UDP sockets in sockmap, from Lorenz Bauer.

  19) Fix stretch ACK bugs in several TCP congestion control modules,
      from Pengcheng Yang.

  20) Support virtual functiosn in octeontx2 driver, from Tomasz
      Duszynski.

  21) Add region operations for devlink and use it in ice driver to dump
      NVM contents, from Jacob Keller.

  22) Add support for hw offload of MACSEC, from Antoine Tenart.

  23) Add support for BPF programs that can be attached to LSM hooks,
      from KP Singh.

  24) Support for multiple paths, path managers, and counters in MPTCP.
      From Peter Krystad, Paolo Abeni, Florian Westphal, Davide Caratti,
      and others.

  25) More progress on adding the netlink interface to ethtool, from
      Michal Kubecek"

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2121 commits)
  net: ipv6: rpl_iptunnel: Fix potential memory leak in rpl_do_srh_inline
  cxgb4/chcr: nic-tls stats in ethtool
  net: dsa: fix oops while probing Marvell DSA switches
  net/bpfilter: remove superfluous testing message
  net: macb: Fix handling of fixed-link node
  net: dsa: ksz: Select KSZ protocol tag
  netdevsim: dev: Fix memory leak in nsim_dev_take_snapshot_write
  net: stmmac: add EHL 2.5Gbps PCI info and PCI ID
  net: stmmac: add EHL PSE0 & PSE1 1Gbps PCI info and PCI ID
  net: stmmac: create dwmac-intel.c to contain all Intel platform
  net: dsa: bcm_sf2: Support specifying VLAN tag egress rule
  net: dsa: bcm_sf2: Add support for matching VLAN TCI
  net: dsa: bcm_sf2: Move writing of CFP_DATA(5) into slicing functions
  net: dsa: bcm_sf2: Check earlier for FLOW_EXT and FLOW_MAC_EXT
  net: dsa: bcm_sf2: Disable learning for ASP port
  net: dsa: b53: Deny enslaving port 7 for 7278 into a bridge
  net: dsa: b53: Prevent tagged VLAN on port 7 for 7278
  net: dsa: b53: Restore VLAN entries upon (re)configuration
  net: dsa: bcm_sf2: Fix overflow checks
  hv_netvsc: Remove unnecessary round_up for recv_completion_cnt
  ...
2020-03-31 17:29:33 -07:00
Linus Torvalds 97cddfc345 Merge branch 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 build updates from Ingo Molnar:
 "A handful of updates: two linker script cleanups and a stock
  defconfig+allmodconfig bootability fix"

* 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/vdso: Discard .note.gnu.property sections in vDSO
  x86, vmlinux.lds: Add RUNTIME_DISCARD_EXIT to generic DISCARDS
  x86/Kconfig: Make CMDLINE_OVERRIDE depend on non-empty CMDLINE
2020-03-31 10:51:12 -07:00
Linus Torvalds dbb381b619 timekeeping and timer updates:
Core:
 
   - Consolidation of the vDSO build infrastructure to address the
     difficulties of cross-builds for ARM64 compat vDSO libraries by
     restricting the exposure of header content to the vDSO build.
 
     This is achieved by splitting out header content into separate
     headers. which contain only the minimaly required information which is
     necessary to build the vDSO. These new headers are included from the
     kernel headers and the vDSO specific files.
 
   - Enhancements to the generic vDSO library allowing more fine grained
     control over the compiled in code, further reducing architecture
     specific storage and preparing for adopting the generic library by PPC.
 
   - Cleanup and consolidation of the exit related code in posix CPU timers.
 
   - Small cleanups and enhancements here and there
 
  Drivers:
 
   - The obligatory new drivers: Ingenic JZ47xx and X1000 TCU support
 
   - Correct the clock rate of PIT64b global clock
 
   - setup_irq() cleanup
 
   - Preparation for PWM and suspend support for the TI DM timer
 
   - Expand the fttmr010 driver to support ast2600 systems
 
   - The usual small fixes, enhancements and cleanups all over the place
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl6B+QETHHRnbHhAbGlu
 dXRyb25peC5kZQAKCRCmGPVMDXSYofJ5D/94s5fpaqiuNcaAsLq2D3DRIrTnqxx7
 yEeAOPcbYV1bM1SgY/M83L5yGc2S8ny787e26abwRTCZhZV3eAmRTphIFFIZR0Xk
 xS+i67odscbdJTRtztKj3uQ9rFxefszRuphyaa89pwSY9nnyMWLcahGSQOGs0LJK
 hvmgwPjyM1drNfPxgPiaFg7vDr2XxNATpQr/FBt+BhelvVan8TlAfrkcNPiLr++Y
 Axz925FP7jMaRRbZ1acji34gLiIAZk0jLCUdbix7YkPrqDB4GfO+v8Vez+fGClbJ
 uDOYeR4r1+Be/BtSJtJ2tHqtsKCcAL6agtaE2+epZq5HbzaZFRvBFaxgFNF8WVcn
 3FFibdEMdsRNfZTUVp5wwgOLN0UIqE/7LifE12oLEL2oFB5H2PiNEUw3E02XHO11
 rL3zgHhB6Ke1sXKPCjSGdmIQLbxZmV5kOlQFy7XuSeo5fmRapVzKNffnKcftIliF
 1HNtZbgdA+3tdxMFCqoo1QX+kotl9kgpslmdZ0qHAbaRb3xqLoSskbqEjFRMuSCC
 8bjJrwboD9T5GPfwodSCgqs/58CaSDuqPFbIjCay+p90Fcg6wWAkZtyG04ZLdPRc
 GgNNdN4gjTD9bnrRi8cH47z1g8OO4vt4K4SEbmjo8IlDW+9jYMxuwgR88CMeDXd7
 hu7aKsr2I2q/WQ==
 =5o9G
 -----END PGP SIGNATURE-----

Merge tag 'timers-core-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timekeeping and timer updates from Thomas Gleixner:
 "Core:

   - Consolidation of the vDSO build infrastructure to address the
     difficulties of cross-builds for ARM64 compat vDSO libraries by
     restricting the exposure of header content to the vDSO build.

     This is achieved by splitting out header content into separate
     headers. which contain only the minimaly required information which
     is necessary to build the vDSO. These new headers are included from
     the kernel headers and the vDSO specific files.

   - Enhancements to the generic vDSO library allowing more fine grained
     control over the compiled in code, further reducing architecture
     specific storage and preparing for adopting the generic library by
     PPC.

   - Cleanup and consolidation of the exit related code in posix CPU
     timers.

   - Small cleanups and enhancements here and there

  Drivers:

   - The obligatory new drivers: Ingenic JZ47xx and X1000 TCU support

   - Correct the clock rate of PIT64b global clock

   - setup_irq() cleanup

   - Preparation for PWM and suspend support for the TI DM timer

   - Expand the fttmr010 driver to support ast2600 systems

   - The usual small fixes, enhancements and cleanups all over the
     place"

* tag 'timers-core-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (80 commits)
  Revert "clocksource/drivers/timer-probe: Avoid creating dead devices"
  vdso: Fix clocksource.h macro detection
  um: Fix header inclusion
  arm64: vdso32: Enable Clang Compilation
  lib/vdso: Enable common headers
  arm: vdso: Enable arm to use common headers
  x86/vdso: Enable x86 to use common headers
  mips: vdso: Enable mips to use common headers
  arm64: vdso32: Include common headers in the vdso library
  arm64: vdso: Include common headers in the vdso library
  arm64: Introduce asm/vdso/processor.h
  arm64: vdso32: Code clean up
  linux/elfnote.h: Replace elf.h with UAPI equivalent
  scripts: Fix the inclusion order in modpost
  common: Introduce processor.h
  linux/ktime.h: Extract common header for vDSO
  linux/jiffies.h: Extract common header for vDSO
  linux/time64.h: Extract common header for vDSO
  linux/time32.h: Extract common header for vDSO
  linux/time.h: Extract common header for vDSO
  ...
2020-03-30 18:51:47 -07:00
Thomas Gleixner cf226c42b2 Merge branch 'uaccess.futex' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs into locking/core
Pull uaccess futex cleanups for Al Viro:

     Consolidate access_ok() usage and the futex uaccess function zoo.
2020-03-28 11:59:24 +01:00
Al Viro a251b2d513 generic arch_futex_atomic_op_inuser() doesn't need access_ok()
uses get_user() and put_user() for memory accesses

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-03-27 23:58:55 -04:00
Al Viro a08971e948 futex: arch_futex_atomic_op_inuser() calling conventions change
Move access_ok() in and pagefault_enable()/pagefault_disable() out.
Mechanical conversion only - some instances don't really need
a separate access_ok() at all (e.g. the ones only using
get_user()/put_user(), or architectures where access_ok()
is always true); we'll deal with that in followups.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-03-27 23:58:51 -04:00
H.J. Lu 84d5f77fc2 x86, vmlinux.lds: Add RUNTIME_DISCARD_EXIT to generic DISCARDS
In the x86 kernel, .exit.text and .exit.data sections are discarded at
runtime, not by the linker. Add RUNTIME_DISCARD_EXIT to generic DISCARDS
and define it in the x86 kernel linker script to keep them.

The sections are added before the DISCARD directive so document here
only the situation explicitly as this change doesn't have any effect on
the generated kernel. Also, other architectures like ARM64 will use it
too so generalize the approach with the RUNTIME_DISCARD_EXIT define.

 [ bp: Massage and extend commit message. ]

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20200326193021.255002-1-hjl.tools@gmail.com
2020-03-27 11:52:11 +01:00
Marco Elver 27f937cc81 asm-generic, kcsan: Add KCSAN instrumentation for bitops
Add explicit KCSAN checks for bitops.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-03-21 09:41:46 +01:00
Marco Elver ed8af2e4d2 asm-generic, atomic-instrumented: Use generic instrumented.h
This switches atomic-instrumented.h to use the generic instrumentation
wrappers provided by instrumented.h.

No functional change intended.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Marco Elver <elver@google.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-03-21 09:41:42 +01:00
Ingo Molnar a4654e9bde Merge branch 'x86/kdump' into locking/kcsan, to resolve conflicts
Conflicts:
	arch/x86/purgatory/Makefile

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-03-21 09:24:41 +01:00
Fangrui Song 90ceddcb49 bpf: Support llvm-objcopy for vmlinux BTF
Simplify gen_btf logic to make it work with llvm-objcopy. The existing
'file format' and 'architecture' parsing logic is brittle and does not
work with llvm-objcopy/llvm-objdump.

'file format' output of llvm-objdump>=11 will match GNU objdump, but
'architecture' (bfdarch) may not.

.BTF in .tmp_vmlinux.btf is non-SHF_ALLOC. Add the SHF_ALLOC flag
because it is part of vmlinux image used for introspection. C code
can reference the section via linker script defined __start_BTF and
__stop_BTF. This fixes a small problem that previous .BTF had the
SHF_WRITE flag (objcopy -I binary -O elf* synthesized .data).

Additionally, `objcopy -I binary` synthesized symbols
_binary__btf_vmlinux_bin_start and _binary__btf_vmlinux_bin_stop (not
used elsewhere) are replaced with more commonplace __start_BTF and
__stop_BTF.

Add 2>/dev/null because GNU objcopy (but not llvm-objcopy) warns
"empty loadable segment detected at vaddr=0xffffffff81000000, is this intentional?"

We use a dd command to change the e_type field in the ELF header from
ET_EXEC to ET_REL so that lld will accept .btf.vmlinux.bin.o.  Accepting
ET_EXEC as an input file is an extremely rare GNU ld feature that lld
does not intend to support, because this is error-prone.

The output section description .BTF in include/asm-generic/vmlinux.lds.h
avoids potential subtle orphan section placement issues and suppresses
--orphan-handling=warn warnings.

Fixes: df786c9b94 ("bpf: Force .BTF section start to zero when dumping from vmlinux")
Fixes: cb0cc635c7 ("powerpc: Include .BTF section")
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Fangrui Song <maskray@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Stanislav Fomichev <sdf@google.com>
Tested-by: Andrii Nakryiko <andriin@fb.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Link: https://github.com/ClangBuiltLinux/linux/issues/871
Link: https://lore.kernel.org/bpf/20200318222746.173648-1-maskray@google.com
2020-03-19 12:32:38 +01:00
Will Deacon 5d0c9b0eb8 asm-generic/bitops: Update stale comment
The comment in 'asm-generic/bitops.h' states that you should "recode
these in the native assembly language, if at all possible". This is
pretty crappy advice now that the generic implementation is defined in
terms of atomic_long_t rather than a spinlock, so update the comment and
hopefully save future architecture maintainers a bit of work.

Reported-by: Stefan Asserhall <stefana@xilinx.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200213093927.1836-1-will@kernel.org
2020-03-06 11:06:19 +01:00
Thomas Gleixner c7a18100bd lib/vdso: Avoid highres update if clocksource is not VDSO capable
If the current clocksource is not VDSO capable there is no point in
updating the high resolution parts of the VDSO data.

Replace the architecture specific check with a check for a VDSO capable
clocksource and skip the update if there is none.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lkml.kernel.org/r/20200207124403.563379423@linutronix.de
2020-02-17 20:12:17 +01:00
Thomas Gleixner f86fd32db7 lib/vdso: Cleanup clock mode storage leftovers
Now that all architectures are converted to use the generic storage the
helpers and conditionals can be removed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lkml.kernel.org/r/20200207124403.470699892@linutronix.de
2020-02-17 20:12:17 +01:00
Andy Shevchenko 046e14afb3 gpio: Avoid kernel.h inclusion where it's possible
Inclusion of kernel.h increases the mess with the header dependencies.
Avoid kernel.h inclusion where it's possible.

Besides that, clean up a bit other inclusions inside GPIO subsystem headers.
It includes:
 - removal pin control bits (forward declaration and header) from linux/gpio.h
 - removal of.h from asm-generic/gpio.h
 - use of explicit headers in gpio/consumer.h
 - add FIXME note with regard to gpio.h inclusion in of_gpio,h

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200205134336.20197-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-02-10 12:58:36 +01:00
Linus Torvalds 153b5c566d Microblaze patches for 5.6-rc1
- Enable CMA
 - Add support for MB v11
 - Defconfig updates
 - Minor fixes
 -----BEGIN PGP SIGNATURE-----
 
 iF0EABECAB0WIQQbPNTMvXmYlBPRwx7KSWXLKUoMIQUCXjlJ1gAKCRDKSWXLKUoM
 IWy9AJ4tauV9sUb+zNadrYxI+2zemRstUwCfQ49LG4kHpFCv8ldSTmhBPJY/3MI=
 =QpT4
 -----END PGP SIGNATURE-----

Merge tag 'microblaze-v5.6-rc1' of git://git.monstr.eu/linux-2.6-microblaze

Pull Microblaze update from Michal Simek:

 - enable CMA

 - add support for MB v11

 - defconfig updates

 - minor fixes

* tag 'microblaze-v5.6-rc1' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Add ID for Microblaze v11
  microblaze: Prevent the overflow of the start
  microblaze: Wire CMA allocator
  asm-generic: Make dma-contiguous.h a mandatory include/asm header
  microblaze: Sync defconfig with latest Kconfig layout
  microblaze: defconfig: Disable EXT2 driver and Enable EXT3 & EXT4 drivers
  microblaze: Align comments with register usage
2020-02-04 11:58:07 +00:00
Michal Simek def3f7cefe asm-generic: Make dma-contiguous.h a mandatory include/asm header
dma-continuguous.h is generic for all architectures except arm32 which has
its own version.

Similar change was done for msi.h by commit a1b39bae16
("asm-generic: Make msi.h a mandatory include/asm header")

Suggested-by: Christoph Hellwig <hch@infradead.org>
Link: https://lore.kernel.org/linux-arm-kernel/20200117080446.GA8980@lst.de/T/#m92bb56b04161057635d4142e1b3b9b6b0a70122e
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Paul Walmsley <paul.walmsley@sifive.com> # for arch/riscv
2020-02-04 11:38:59 +01:00
Linus Torvalds cc12071ff3 Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:
 "The rest of MM and the rest of everything else: hotfixes, ipc, misc,
  procfs, lib, cleanups, arm"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (67 commits)
  ARM: dma-api: fix max_pfn off-by-one error in __dma_supported()
  treewide: remove redundant IS_ERR() before error code check
  include/linux/cpumask.h: don't calculate length of the input string
  lib: new testcases for bitmap_parse{_user}
  lib: rework bitmap_parse()
  lib: make bitmap_parse_user a wrapper on bitmap_parse
  lib: add test for bitmap_parse()
  bitops: more BITS_TO_* macros
  lib/string: add strnchrnul()
  proc: convert everything to "struct proc_ops"
  proc: decouple proc from VFS with "struct proc_ops"
  asm-generic/tlb: provide MMU_GATHER_TABLE_FREE
  asm-generic/tlb: rename HAVE_MMU_GATHER_NO_GATHER
  asm-generic/tlb: rename HAVE_MMU_GATHER_PAGE_SIZE
  asm-generic/tlb: rename HAVE_RCU_TABLE_FREE
  asm-generic/tlb: add missing CONFIG symbol
  asm-gemeric/tlb: remove stray function declarations
  asm-generic/tlb: avoid potential double flush
  mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush
  powerpc/mmu_gather: enable RCU_TABLE_FREE even for !SMP case
  ...
2020-02-04 07:24:48 +00:00
Peter Zijlstra 0d6e24d430 asm-generic/tlb: provide MMU_GATHER_TABLE_FREE
As described in the comment, the correct order for freeing pages is:

 1) unhook page
 2) TLB invalidate page
 3) free page

This order equally applies to page directories.

Currently there are two correct options:

 - use tlb_remove_page(), when all page directores are full pages and
   there are no futher contraints placed by things like software
   walkers (HAVE_FAST_GUP).

 - use MMU_GATHER_RCU_TABLE_FREE and tlb_remove_table() when the
   architecture does not do IPI based TLB invalidate and has
   HAVE_FAST_GUP (or software TLB fill).

This however leaves architectures that don't have page based directories
but don't need RCU in a bind.  For those, provide MMU_GATHER_TABLE_FREE,
which provides the independent batching for directories without the
additional RCU freeing.

Link: http://lkml.kernel.org/r/20200116064531.483522-10-aneesh.kumar@linux.ibm.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04 03:05:26 +00:00
Peter Zijlstra 580a586c40 asm-generic/tlb: rename HAVE_MMU_GATHER_NO_GATHER
Towards a more consistent naming scheme.

Link: http://lkml.kernel.org/r/20200116064531.483522-9-aneesh.kumar@linux.ibm.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04 03:05:26 +00:00
Peter Zijlstra 3af4bd0337 asm-generic/tlb: rename HAVE_MMU_GATHER_PAGE_SIZE
Towards a more consistent naming scheme.

Link: http://lkml.kernel.org/r/20200116064531.483522-8-aneesh.kumar@linux.ibm.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04 03:05:26 +00:00
Peter Zijlstra ff2e6d7259 asm-generic/tlb: rename HAVE_RCU_TABLE_FREE
Towards a more consistent naming scheme.

[akpm@linux-foundation.org: fix sparc64 Kconfig]
Link: http://lkml.kernel.org/r/20200116064531.483522-7-aneesh.kumar@linux.ibm.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04 03:05:26 +00:00
Peter Zijlstra 491a49ff14 asm-gemeric/tlb: remove stray function declarations
We removed the actual functions a while ago.

Link: http://lkml.kernel.org/r/20200116064531.483522-5-aneesh.kumar@linux.ibm.com
Fixes: 1808d65b55 ("asm-generic/tlb: Remove arch_tlb*_mmu()")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04 03:05:26 +00:00
Peter Zijlstra 0758cd8304 asm-generic/tlb: avoid potential double flush
Aneesh reported that:

	tlb_flush_mmu()
	  tlb_flush_mmu_tlbonly()
	    tlb_flush()			<-- #1
	  tlb_flush_mmu_free()
	    tlb_table_flush()
	      tlb_table_invalidate()
		tlb_flush_mmu_tlbonly()
		  tlb_flush()		<-- #2

does two TLBIs when tlb->fullmm, because __tlb_reset_range() will not
clear tlb->end in that case.

Observe that any caller to __tlb_adjust_range() also sets at least one of
the tlb->freed_tables || tlb->cleared_p* bits, and those are
unconditionally cleared by __tlb_reset_range().

Change the condition for actually issuing TLBI to having one of those bits
set, as opposed to having tlb->end != 0.

Link: http://lkml.kernel.org/r/20200116064531.483522-4-aneesh.kumar@linux.ibm.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reported-by: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04 03:05:26 +00:00
Peter Zijlstra 0ed1325967 mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush
Architectures for which we have hardware walkers of Linux page table
should flush TLB on mmu gather batch allocation failures and batch flush.
Some architectures like POWER supports multiple translation modes (hash
and radix) and in the case of POWER only radix translation mode needs the
above TLBI.  This is because for hash translation mode kernel wants to
avoid this extra flush since there are no hardware walkers of linux page
table.  With radix translation, the hardware also walks linux page table
and with that, kernel needs to make sure to TLB invalidate page walk cache
before page table pages are freed.

More details in commit d86564a2f0 ("mm/tlb, x86/mm: Support invalidating
TLB caches for RCU_TABLE_FREE")

The changes to sparc are to make sure we keep the old behavior since we
are now removing HAVE_RCU_TABLE_NO_INVALIDATE.  The default value for
tlb_needs_table_invalidate is to always force an invalidate and sparc can
avoid the table invalidate.  Hence we define tlb_needs_table_invalidate to
false for sparc architecture.

Link: http://lkml.kernel.org/r/20200116064531.483522-3-aneesh.kumar@linux.ibm.com
Fixes: a46cc7a90f ("powerpc/mm/radix: Improve TLB/PWC flushes")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>	[powerpc]
Cc: <stable@vger.kernel.org>	[4.14+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04 03:05:26 +00:00
Steven Price 93fab1b22e mm: add generic p?d_leaf() macros
Patch series "Generic page walk and ptdump", v17.

Many architectures current have a debugfs file for dumping the kernel page
tables.  Currently each architecture has to implement custom functions for
this because the details of walking the page tables used by the kernel are
different between architectures.

This series extends the capabilities of walk_page_range() so that it can
deal with the page tables of the kernel (which have no VMAs and can
contain larger huge pages than exist for user space).  A generic PTDUMP
implementation is the implemented making use of the new functionality of
walk_page_range() and finally arm64 and x86 are switch to using it,
removing the custom table walkers.

To enable a generic page table walker to walk the unusual mappings of the
kernel we need to implement a set of functions which let us know when the
walker has reached the leaf entry.  After a suggestion from Will Deacon
I've chosen the name p?d_leaf() as this (hopefully) describes the purpose
(and is a new name so has no historic baggage).  Some architectures have
p?d_large macros but this is easily confused with "large pages".

This series ends with a generic PTDUMP implemention for arm64 and x86.

Mostly this is a clean up and there should be very little functional
change.  The exceptions are:

* arm64 PTDUMP debugfs now displays pages which aren't present (patch 22).

* arm64 has the ability to efficiently process KASAN pages (which
  previously only x86 implemented).  This means that the combination of
  KASAN and DEBUG_WX is now useable.

This patch (of 23):

Exposing the pud/pgd levels of the page tables to walk_page_range() means
we may come across the exotic large mappings that come with large areas of
contiguous memory (such as the kernel's linear map).

For architectures that don't provide all p?d_leaf() macros, provide
generic do nothing default that are suitable where there cannot be leaf
pages at that level.  Futher patches will add implementations for
individual architectures.

The name p?d_leaf() is chosen to minimize the confusion with existing uses
of "large" pages and "huge" pages which do not necessary mean that the
entry is a leaf (for example it may be a set of contiguous entries that
only take 1 TLB slot).  For the purpose of walking the page tables we
don't need to know how it will be represented in the TLB, but we do need
to know for sure if it is a leaf of the tree.

Link: http://lkml.kernel.org/r/20191218162402.45610-2-steven.price@arm.com
Signed-off-by: Steven Price <steven.price@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morse <james.morse@arm.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Zong Li <zong.li@sifive.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04 03:05:24 +00:00
Linus Torvalds 322bf2d344 Merge branch 'for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu
Pull percpu updates from Dennis Zhou:
 "Separate out variables that can be decrypted into their own page
  anytime encryption can be enabled and fix __percpu annotations in
  asm-generic for sparse"

* 'for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
  percpu: Separate decrypted varaibles anytime encryption can be enabled
  percpu: fix __percpu annotation in asm-generic
2020-02-03 22:27:33 +00:00
Linus Torvalds ddaefe8947 Modules updates for v5.6
Summary of modules changes for the 5.6 merge window:
 
 - Add "MS" (SHF_MERGE|SHF_STRINGS) section flags to __ksymtab_strings to
   indicate to the linker that it can perform string deduplication (i.e.,
   duplicate strings are reduced to a single copy in the string table).
   This means any repeated namespace string would be merged to just one
   entry in __ksymtab_strings.
 
 - Various code cleanups and small fixes (fix small memleak in error path,
   improve moduleparam docs, silence rcu warnings, improve error logging)
 
 Signed-off-by: Jessica Yu <jeyu@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJEBAABCAAuFiEEVrp26glSWYuDNrCUwEV+OM47wXIFAl40TvwQHGpleXVAa2Vy
 bmVsLm9yZwAKCRDARX44zjvBcigxD/4/ksGeXvf3tcsRc5M5S33Tws25vcHeByz/
 WEX1f7ZnXukCApFdnpUbVkjiH7EM0+T6lGumv4NPJht+ggP8JoY9hMkBqMmd0js/
 +R9U6o0vB4LW8zU68RwE0TS4qphpmpJz16HlhTPtIk4Vo0GBxnEYMMMcVWIeqq1W
 m3KcEUudv9/Y7IFawDNRJcUWI1jD2vcfaavbU6XbTw82ARiiScZFrWYzf1PGYJ6L
 XvJNwCVh8TDbS4C5kaNWp2LiGXegjKClosdisCIjkQr/3e+Rg1jOGHpa6B2+Vow2
 ttq6lmcikNpcCkCV1tFz+ex2LLsLBMAO939c2C0LIhnnIxVgSkDU0pWn3psAxiOl
 lRqHtQN42dRlOtBwZ9JoKTT9Wi3H/Lx0FCxg5OdblrSlOqH+GxQjBLkgtvmn/ZAh
 /dReehUoqbL55GieZuPPyostg3upCDE27IQZdFrZLWbE0VGiIyU9p6GYo7Tssuo2
 Tr8kmhYUF9o1AnlzVQgGgZF73PpM6vhmEnn/dipZrgFI//2A3xkAfi5JdhGLKsFi
 UsaeTX3q/AmnC8dqaNayiftSgaK/4hdSboW1hgWLLD98H608s7Bl1reTmXPxSyWj
 RvBVP0vp5+u9EItfkAG6jbEpM5ZtyFDUc+5KNfJhym6vaplp5H+krIrT2Li+oLUu
 d/eifJ/1vA==
 =boqg
 -----END PGP SIGNATURE-----

Merge tag 'modules-for-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux

Pull module updates from Jessica Yu:
 "Summary of modules changes for the 5.6 merge window:

   - Add "MS" (SHF_MERGE|SHF_STRINGS) section flags to __ksymtab_strings
     to indicate to the linker that it can perform string deduplication
     (i.e., duplicate strings are reduced to a single copy in the string
     table). This means any repeated namespace string would be merged to
     just one entry in __ksymtab_strings.

   - Various code cleanups and small fixes (fix small memleak in error
     path, improve moduleparam docs, silence rcu warnings, improve error
     logging)"

* tag 'modules-for-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
  module.h: Annotate mod_kallsyms with __rcu
  module: avoid setting info->name early in case we can fall back to info->mod->name
  modsign: print module name along with error message
  kernel/module: Fix memleak in module_add_modinfo_attrs()
  export.h: reduce __ksymtab_strings string duplication by using "MS" section flags
  moduleparam: fix kerneldoc
  modules: lockdep: Suppress suspicious RCU usage warning
2020-01-31 11:42:13 -08:00
Luc Van Oostenryck becef184df percpu: fix __percpu annotation in asm-generic
The generic implementation of raw_cpu_generic_add_return() is:

        #define raw_cpu_generic_add_return(pcp, val)            \
        ({                                                      \
                typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp));       \
                                                                \
                *__p += val;                                    \
                *__p;                                           \
        })

where the 'pcp' argument is a __percpu lvalue.
There, the variable '__p' is declared as a __percpu pointer
the type of the address of 'pcp') but:
1) the value assigned to it, the return value of raw_cpu_ptr(), is
   a plain (__kernel) pointer, not a __percpu one.
2) this variable is dereferenced just after while a __percpu
   pointer is implicitly __noderef.

So, fix the declaration of the 'pcp' variable to its correct type:
the plain (non-percpu) pointer corresponding to pcp's address,
using the fact that typeof() ignores the address space and the
'noderef' attribute of its agument.

Same for raw_cpu_generic_xchg(), raw_cpu_generic_cmpxchg() &
raw_cpu_generic_cmpxchg_double().

This removes 209 warnings on ARM, 525 on ARM64, 220 on x86 &
more than 2600 on ppc64 (all of them with the default config).

Cc: Tejun Heo <tj@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Reported-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
2020-01-31 11:15:59 -08:00
Linus Torvalds ccaaaf6fe5 MPX requires recompiling applications, which requires compiler support.
Unfortunately, GCC 9.1 is expected to be be released without support for
 MPX.  This means that there was only a relatively small window where
 folks could have ever used MPX.  It failed to gain wide adoption in the
 industry, and Linux was the only mainstream OS to ever support it widely.
 
 Support for the feature may also disappear on future processors.
 
 This set completes the process that we started during the 5.4 merge window.
 -----BEGIN PGP SIGNATURE-----
 
 iQIcBAABCAAGBQJeK1/pAAoJEGg1lTBwyZKwgC8QAIiVn1d7A9Uj/WpnpgfCChCZ
 9XiV6Ak999qD9fbAcrgNfPjieaD4mtokocSRVJuRgJu5iLnIJCINlozLPe4yVl7P
 7zebnxkLq0CIA8d56bEUoFlC0J+oWYlDVQePZzNQsSk5KHVGXVLpF6U4vDVzZeQy
 cprgvdeY+ehB7G6IIo0MWTg5ylKYAsOAyVvK8NIGpKY2k6/YqCnsptnsVE7bvlHy
 TrEOiUWLv+hh0bMkZdP1PwKQKEuMO/IZly0HtviFbMN7T4TB1spfg7ELoBucEq3T
 s4EVbYRe+nIE4tuEAveaX3CgxJek8cY5MlticskdaKSEACBwabdOF55qsZy0u+WA
 PYC4iUIXfbOH8OgieKWtGX4IuSkRYdQ2nP4BOpe4ZX4+zvU7zOCIyVSKRrwkX8cc
 ADtWI5FAtB36KCgUuWnHGHNZpOxPTbTLBuBataFY4Q2uBNJEBJpscZ5H9ObtyGFU
 ZjlzqFnM0nFNDKEI1EEtv9jLzgZTU1RQ46s7EFeSeEQ2/s9wJ3+s5sBlVbljsmus
 o658bLOEaRWC/aF15dgmEXW9GAO6uifNdmbzGnRn7oEMYyFQPTWbZvi1zGz58QaG
 Y6WTtigVtsSrHS4wpYd+p+n1W06VnB6J3BpBM4G1VQv1Vm0dNd1tUOfkqOzPjg7c
 33Itmsz2LaW1mb67GlgZ
 =g4cC
 -----END PGP SIGNATURE-----

Merge tag 'mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-mpx

Pull x86 MPX removal from Dave Hansen:
 "MPX requires recompiling applications, which requires compiler
  support. Unfortunately, GCC 9.1 is expected to be be released without
  support for MPX. This means that there was only a relatively small
  window where folks could have ever used MPX. It failed to gain wide
  adoption in the industry, and Linux was the only mainstream OS to ever
  support it widely.

  Support for the feature may also disappear on future processors.

  This set completes the process that we started during the 5.4 merge
  window when the MPX prctl()s were removed. XSAVE support is left in
  place, which allows MPX-using KVM guests to continue to function"

* tag 'mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-mpx:
  x86/mpx: remove MPX from arch/x86
  mm: remove arch_bprm_mm_init() hook
  x86/mpx: remove bounds exception code
  x86/mpx: remove build infrastructure
  x86/alternatives: add missing insn.h include
2020-01-30 16:11:50 -08:00
Linus Torvalds a56c41e5d7 Two fixes for the generic VDSO code which missed 5.5:
- Make the update to the coarse timekeeper unconditional. This is required
    because the coarse timekeeper interfaces in the VDSO do not depend on a
    VDSO capable clocksource. If the system does not have a VDSO capable
    clocksource and the update is depending on the VDSO capable clocksource,
    the coarse VDSO interfaces would operate on stale data forever.
 
  - Invert the logic of __arch_update_vdso_data() to avoid further head
    scratching. Tripped over this several times while analyzing the update
    problem above.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl4vXzUTHHRnbHhAbGlu
 dXRyb25peC5kZQAKCRCmGPVMDXSYodbPD/4km+XOhsbefcn1Xo6SAQV9akPhKSHY
 h1gfjpe4UD+Uj4WfmpERHcCJA3sYtZSjNyEWkwagH1XjB+rcLc3JE8XvhPCZTXCx
 g/OQlww1ef6mBZ5nslpPUZs8i0HppoV7Sa955QxR/jWuOIEssg5c+XGqP8xX8AhX
 TqBOUcJd0LhqCGt76Gb6LHnOEshE8e6ptZ0xayzMZsab3LJTEaJCrsoDpADQ1q8A
 hMjiL3CG9/e12qKYhODFTbyc/wgyGQYK8g6sb9E1Twd2Tw2+ikRbtZuQd3HQv4jV
 SiVtmMqLu6IH+G608zeNIn/67/WX9zYqUZ3fZgSjBwXWoB84Gyj11KLnjmCgS6SH
 0ddOQKPn8VyQc2anG4obRtMNB+TjJvGnB4QSL2ROJB7Zx6EYMsduhXwIbaNZDDro
 nIh6Xvl6iyb0lkhd9zCR7ak7UHJg4ECJsVKK3kAMIHJM4f53d/DwT+ZaHbJZa/2a
 OLoBGpBkJoE1X40dXou+0FUyUFRla42+ho99nCU580EyK/ZAuZEqKjjez9QIh4vN
 L/I6uEHGBw9myB40nb0DFhRIFR97BUkRTRA3VhyX0CYIE3gUL43zNFsdvcugsxRy
 4/Cf7tqhQcSjYjJxpLTRRWt2t6QvDoWfTnrwiPqSepcO17uV8WHLrxK4mT2i8Vjc
 PIq7OgZlp09gQA==
 =ONO4
 -----END PGP SIGNATURE-----

Merge tag 'timers-urgent-2020-01-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer fixes from Thomas Gleixner:
 "Two fixes for the generic VDSO code which missed 5.5:

   - Make the update to the coarse timekeeper unconditional.

     This is required because the coarse timekeeper interfaces in the
     VDSO do not depend on a VDSO capable clocksource. If the system
     does not have a VDSO capable clocksource and the update is
     depending on the VDSO capable clocksource, the coarse VDSO
     interfaces would operate on stale data forever.

   - Invert the logic of __arch_update_vdso_data() to avoid further head
     scratching.

     Tripped over this several times while analyzing the update problem
     above"

* tag 'timers-urgent-2020-01-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  lib/vdso: Update coarse timekeeper unconditionally
  lib/vdso: Make __arch_update_vdso_data() logic understandable
2020-01-27 16:37:40 -08:00
Linus Torvalds 6a1000bd27 ioremap changes for 5.6
- remove ioremap_nocache given that is is equivalent to
    ioremap everywhere
 -----BEGIN PGP SIGNATURE-----
 
 iQI/BAABCgApFiEEgdbnc3r/njty3Iq9D55TZVIEUYMFAl4vKHwLHGhjaEBsc3Qu
 ZGUACgkQD55TZVIEUYMPGBAAuVNUZaZfWYHpiVP2oRcUQUguFiD3NTbknsyzV2oH
 J9P0GfeENSKwE9OOhZ7XIjnCZAJwQgTK/ppQY5yiQ/KAtYyyXjXEJ6jqqjiTDInr
 +3+I3t/LhkgrK7tMrb7ylTGa/d7KhaciljnOXC8+b75iddvM9I1z2pbHDbppZMS9
 wT4RXL/cFtRb85AfOyPLybcka3f5P2gGvQz38qyimhJYEzHDXZu9VO1Bd20f8+Xf
 eLBKX0o6yWMhcaPLma8tm0M0zaXHEfLHUKLSOkiOk+eHTWBZ3b/w5nsOQZYZ7uQp
 25yaClbameAn7k5dHajduLGEJv//ZjLRWcN3HJWJ5vzO111aHhswpE7JgTZJSVWI
 ggCVkytD3ESXapvswmACSeCIDMmiJMzvn6JvwuSMVB7a6e5mcqTuGo/FN+DrBF/R
 IP+/gY/T7zIIOaljhQVkiEIIwiD/akYo0V9fheHTBnqcKEDTHV4WjKbeF6aCwcO+
 b8inHyXZSKSMG//UlDuN84/KH/o1l62oKaB1uDIYrrL8JVyjAxctWt3GOt5KgSFq
 wVz1lMw4kIvWtC/Sy2H4oB+RtODLp6yJDqmvmPkeJwKDUcd/1JKf0KsZ8j3FpGei
 /rEkBEss0KBKyFAgBSRO2jIpdj2epgcBcsdB/r5mlhcn8L77AS6mHbA173kY4pQ/
 Kdg=
 =TUCJ
 -----END PGP SIGNATURE-----

Merge tag 'ioremap-5.6' of git://git.infradead.org/users/hch/ioremap

Pull ioremap updates from Christoph Hellwig:
 "Remove the ioremap_nocache API (plus wrappers) that are always
  identical to ioremap"

* tag 'ioremap-5.6' of git://git.infradead.org/users/hch/ioremap:
  remove ioremap_nocache and devm_ioremap_nocache
  MIPS: define ioremap_nocache to ioremap
2020-01-27 13:03:00 -08:00
Ingo Molnar 7add7875a8 Merge branch 'kcsan.2020.01.07a' into locking/kcsan
Pull KCSAN updates from Paul E. McKenney:

 - UBSAN fixes
 - inlining updates
 - documentation updates

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-01-24 09:35:51 +01:00
Dave Hansen 42222eae17 mm: remove arch_bprm_mm_init() hook
From: Dave Hansen <dave.hansen@linux.intel.com>

MPX is being removed from the kernel due to a lack of support
in the toolchain going forward (gcc).

arch_bprm_mm_init() is used at execve() time.  The only non-stub
implementation is on x86 for MPX.  Remove the hook entirely from
all architectures and generic code.

Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: x86@kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-arch@vger.kernel.org
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
2020-01-23 10:41:16 -08:00
Ingo Molnar 837171fe77 Linux 5.5-rc7
-----BEGIN PGP SIGNATURE-----
 
 iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAl4k7i8eHHRvcnZhbGRz
 QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGvk0IAKRenVOdiudY77SQ
 VZjsteyrYTTQtPPv494ToIRjR0XQ+gYp8vyWzXTUC5Nm9Y9U3VzDqUPUjWszrSXE
 6mU+tzcMc9qwuUxnIFn8zfg64ygw+37sn/w3xqeH4QmF9Z5Wl3EX3SdXTs7jp3RS
 VxiztkUNI5ZBV2GDtla5K/9qLPqCQnUYXIiyi5lAtBtiitZDVXFp7dy7hMgEiaEO
 +78K5Kh3xlt5ndDsBFOlwIb2Oof3KL7bBXntdbSBc/bjol6IRvAgln48HWCv59G2
 jzAp2tj2KobX9GRAEPj+v4TQZEW0SXDNDi8MgQsM+3DYVCTmANsv57CBKRuf01+F
 nB1kAys=
 =zSnJ
 -----END PGP SIGNATURE-----

Merge tag 'v5.5-rc7' into locking/kcsan, to refresh the tree

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-01-20 08:42:47 +01:00
Thomas Gleixner 9a6b55ac4a lib/vdso: Make __arch_update_vdso_data() logic understandable
The function name suggests that this is a boolean checking whether the
architecture asks for an update of the VDSO data, but it works the other
way round. To spare further confusion invert the logic.

Fixes: 44f57d788e ("timekeeping: Provide a generic update_vsyscall() implementation")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20200114185946.656652824@linutronix.de
2020-01-17 15:53:50 +01:00
Marco Elver c020395b66 asm-generic/atomic: Use __always_inline for pure wrappers
Prefer __always_inline for atomic wrappers. When building for size
(CC_OPTIMIZE_FOR_SIZE), some compilers appear to be less inclined to
inline even relatively small static inline functions that are assumed to
be inlinable such as atomic ops. This can cause problems, for example in
UACCESS regions.

By using __always_inline, we let the real implementation and not the
wrapper determine the final inlining preference.

For x86 tinyconfig we observe:
- vmlinux baseline: 1316204
- vmlinux with patch: 1315988 (-216 bytes)

This came up when addressing UACCESS warnings with CC_OPTIMIZE_FOR_SIZE
in the KCSAN runtime:
http://lkml.kernel.org/r/58708908-84a0-0a81-a836-ad97e33dbb62@infradead.org

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Marco Elver <elver@google.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2020-01-07 07:47:23 -08:00
Christoph Hellwig 4bdc0d676a remove ioremap_nocache and devm_ioremap_nocache
ioremap has provided non-cached semantics by default since the Linux 2.6
days, so remove the additional ioremap_nocache interface.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2020-01-06 09:45:59 +01:00
Mike Rapoport 4f0bd80813 asm-generic/nds32: don't redefine cacheflush primitives
The commit c296d4dc13 ("asm-generic: fix a compilation warning") changed
asm-generic/cachflush.h to use static inlines instead of macros and as a
result the nds32 build with CONFIG_CPU_CACHE_ALIASING=n fails:

  CC      init/main.o
In file included from arch/nds32/include/asm/cacheflush.h:43,
                 from include/linux/highmem.h:12,
                 from include/linux/pagemap.h:11,
                 from include/linux/blkdev.h:16,
                 from include/linux/blk-cgroup.h:23,
                 from include/linux/writeback.h:14,
                 from init/main.c:44:
include/asm-generic/cacheflush.h:50:20: error: static declaration of 'flush_icache_range' follows non-static declaration
 static inline void flush_icache_range(unsigned long start, unsigned long end)
                    ^~~~~~~~~~~~~~~~~~
In file included from include/linux/highmem.h:12,
                 from include/linux/pagemap.h:11,
                 from include/linux/blkdev.h:16,
                 from include/linux/blk-cgroup.h:23,
                 from include/linux/writeback.h:14,
                 from init/main.c:44:
arch/nds32/include/asm/cacheflush.h:11:6: note: previous declaration of 'flush_icache_range' was here
 void flush_icache_range(unsigned long start, unsigned long end);
      ^~~~~~~~~~~~~~~~~~

Surround the inline functions in asm-generic/cacheflush.h by ifdef's so
that architectures could override them and add the required overrides to
nds32.

Fixes: c296d4dc13 ("asm-generic: fix a compilation warning")
Link: https://lore.kernel.org/lkml/201912212139.yptX8CsV%25lkp@intel.com/
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Greentime Hu <green.hu@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-12-30 11:18:43 +01:00
Ingo Molnar 28336be568 Linux 5.5-rc4
-----BEGIN PGP SIGNATURE-----
 
 iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAl4JNtkeHHRvcnZhbGRz
 QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGdN0H/3UI6LHOx1ol3/7L
 TwgMibg2pNxNU05bowDjQt92+Hgj9JM0TeFBsfr5hLaeKBgeVCPr5xK/vH09NlKu
 otVGbhBLpl9OAUu9znTfbt4bcqhJKlr/K0mS5e1vPsXvZ3wdHS27trwjgyu16/pP
 NJwkcs5/VRYVC/SrZay2NvheKN+DoGSd4+ZlJprwtAAVMdbEvoaGqRLGKLfLeDMc
 Z04w8AKhnKIxSkt+eEmuW9+pAQJUAkk4QVjixcJe8q0QpA1XIj965yvE8+XpjbLo
 eFxupmZq4S2JdCjsa+iBferJ5juR1FVhbHSbZtLsTtkPVegI9ug911WQ+KiCqErI
 VkiKUl8=
 =rNsn
 -----END PGP SIGNATURE-----

Merge tag 'v5.5-rc4' into locking/kcsan, to resolve conflicts

Conflicts:
	init/main.c
	lib/Kconfig.debug

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-30 08:10:51 +01:00
Jessica Yu ce2b617ce8 export.h: reduce __ksymtab_strings string duplication by using "MS" section flags
Commit c3a6cf19e6 ("export: avoid code duplication in
include/linux/export.h") refactors export.h quite nicely, but introduces
a slight increase in memory usage due to using the empty string ""
instead of NULL to indicate that an exported symbol has no namespace. As
mentioned in that commit, this meant an increase of 1 byte per exported
symbol without a namespace. For example, if a kernel configuration has
about 10k exported symbols, this would mean that the size of
__ksymtab_strings would increase by roughly 10kB.

We can alleviate this situation by utilizing the SHF_MERGE and
SHF_STRING section flags. SHF_MERGE|SHF_STRING indicate to the linker
that the data in the section are null-terminated strings that can be
merged to eliminate duplication. More specifically, from the binutils
documentation - "for sections with both M and S, a string which is a
suffix of a larger string is considered a duplicate. Thus "def" will be
merged with "abcdef"; A reference to the first "def" will be changed to
a reference to "abcdef"+3". Thus, all the empty strings would be merged
as well as any strings that can be merged according to the cited method
above. For example, "memset" and "__memset" would be merged to just
"__memset" in __ksymtab_strings.

As of v5.4-rc5, the following statistics were gathered with x86
defconfig with approximately 10.7k exported symbols.

Size of __ksymtab_strings in vmlinux:
-------------------------------------
v5.4-rc5: 213834 bytes
v5.4-rc5 with commit c3a6cf19e695: 224455 bytes
v5.4-rc5 with this patch: 205759 bytes

So, we already see memory savings of ~8kB compared to vanilla -rc5 and
savings of nearly 18.7kB compared to -rc5 with commit c3a6cf19e6 on top.

Unfortunately, as of this writing, strings will not get deduplicated for
kernel modules, as ld does not do the deduplication for
SHF_MERGE|SHF_STRINGS sections for relocatable files (ld -r), which
kernel modules are. A patch for ld is currently being worked on to
hopefully allow for string deduplication in relocatable files in the
future.

Suggested-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Matthias Maennich <maennich@google.com>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
2019-12-16 10:35:33 +01:00
Linus Torvalds 43a2898631 powerpc updates for 5.5 #2
A few commits splitting the KASAN instrumented bitops header in
 three, to match the split of the asm-generic bitops headers.
 
 This is needed on powerpc because we use asm-generic/bitops/non-atomic.h,
 for the non-atomic bitops, whereas the existing KASAN instrumented
 bitops assume all the underlying operations are provided by the arch
 as arch_foo() versions.
 
 Thanks to:
   Daniel Axtens & Christophe Leroy.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCAAxFiEEJFGtCPCthwEv2Y/bUevqPMjhpYAFAl3qN0wTHG1wZUBlbGxl
 cm1hbi5pZC5hdQAKCRBR6+o8yOGlgLWFD/4/e3CO1oWjQdDGjgvhydhmhjMQqI9m
 EINQjg3hl0ceig1HzsgjVdWI4TOf7bXbaQRf8m2pFWpA+iSx4KpjlnXzNjfUDapO
 JqzKYfVSdi0o6OAFigDYuN1V5F2jAgrM7/w5PKpVuiAABcgJNcEY59tgEMTdj9r0
 9H3OekYv0UnZ5ZNsUhCibKVvVLdbtys3ALrm1YETAauCkY/lpNk6afcr33t0iw2l
 WAdd2sfWvw4tBn+35ZrNnv7z4hQ423Imd+lyuI5zhMBOOGspgMxlGGeIn370WyAi
 00Jl66TRot6EtWGDVzV10bjB53qDhHrtNIk0NG2QMBB8vdTjBMtXfJnVc3Q8iVZ9
 GkpdvMLNAlmxa4AuzpdHAOUQK48aggQzDmJkGp/JdYT6+WwTa5SLZcsy+njHGyjU
 It+728FnStilM1XvjnaN9pljqANEcN4/YIycK55XGDsZS9fVRMY/QMAQZbdLHfzc
 nB54Q/8vtPc9H69ws3U3g0ogVtYi5ca5RpTPiYU6WUQfEe9mjZdEgglsHC1y8ef2
 9J3Muv4ASDGLjKN+G4dvKLCIgF+QKtsvwrtSztQq6wVnXUxuUQBEQSCaMPN9PN5g
 Hlkjk95WevXcHyXeE2r8cXndUTboIgWRMZp0AHao44du3EziPMCvE0tFAHOEWfV0
 8Oty9Fo5QSb1Mw==
 =FCVX
 -----END PGP SIGNATURE-----

Merge tag 'powerpc-5.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull more powerpc updates from Michael Ellerman:
 "A few commits splitting the KASAN instrumented bitops header in three,
  to match the split of the asm-generic bitops headers.

  This is needed on powerpc because we use the generic bitops for the
  non-atomic case only, whereas the existing KASAN instrumented bitops
  assume all the underlying operations are provided by the arch as
  arch_foo() versions.

  Thanks to: Daniel Axtens & Christophe Leroy"

* tag 'powerpc-5.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  docs/core-api: Remove possibly confusing sub-headings from Bit Operations
  powerpc: support KASAN instrumentation of bitops
  kasan: support instrumented bitops combined with generic bitops
2019-12-06 13:36:31 -08:00
Mike Rapoport f949286c66 mm: remove __ARCH_HAS_4LEVEL_HACK and include/asm-generic/4level-fixup.h
There are no architectures that use include/asm-generic/4level-fixup.h
therefore it can be removed along with __ARCH_HAS_4LEVEL_HACK define.

Link: http://lkml.kernel.org/r/1572938135-31886-14-git-send-email-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Anatoly Pugachev <matorola@gmail.com>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Peter Rosin <peda@axentia.se>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rolf Eike Beer <eike-kernel@sf-tec.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Sam Creasey <sammy@sammy.net>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-04 19:44:15 -08:00
William Breathitt Gray 169c474fb2 bitops: introduce the for_each_set_clump8 macro
Pach series "Introduce the for_each_set_clump8 macro", v18.

While adding GPIO get_multiple/set_multiple callback support for various
drivers, I noticed a pattern of looping manifesting that would be useful
standardized as a macro.

This patchset introduces the for_each_set_clump8 macro and utilizes it
in several GPIO drivers.  The for_each_set_clump macro8 facilitates a
for-loop syntax that iterates over a memory region entire groups of set
bits at a time.

For example, suppose you would like to iterate over a 32-bit integer 8
bits at a time, skipping over 8-bit groups with no set bit, where
XXXXXXXX represents the current 8-bit group:

    Example:        10111110 00000000 11111111 00110011
    First loop:     10111110 00000000 11111111 XXXXXXXX
    Second loop:    10111110 00000000 XXXXXXXX 00110011
    Third loop:     XXXXXXXX 00000000 11111111 00110011

Each iteration of the loop returns the next 8-bit group that has at
least one set bit.

The for_each_set_clump8 macro has four parameters:

    * start: set to the bit offset of the current clump
    * clump: set to the current clump value
    * bits: bitmap to search within
    * size: bitmap size in number of bits

In this version of the patchset, the for_each_set_clump macro has been
reimplemented and simplified based on the suggestions provided by Rasmus
Villemoes and Andy Shevchenko in the version 4 submission.

In particular, the function of the for_each_set_clump macro has been
restricted to handle only 8-bit clumps; the drivers that use the
for_each_set_clump macro only handle 8-bit ports so a generic
for_each_set_clump implementation is not necessary.  Thus, a solution
for large clumps (i.e.  those larger than the width of a bitmap word)
can be postponed until a driver appears that actually requires such a
generic for_each_set_clump implementation.

For what it's worth, a semi-generic for_each_set_clump (i.e.  for clumps
smaller than the width of a bitmap word) can be implemented by simply
replacing the hardcoded '8' and '0xFF' instances with respective
variables.  I have not yet had a need for such an implementation, and
since it falls short of a true generic for_each_set_clump function, I
have decided to forgo such an implementation for now.

In addition, the bitmap_get_value8 and bitmap_set_value8 functions are
introduced to get and set 8-bit values respectively.  Their use is based
on the behavior suggested in the patchset version 4 review.

This patch (of 14):

This macro iterates for each 8-bit group of bits (clump) with set bits,
within a bitmap memory region.  For each iteration, "start" is set to
the bit offset of the found clump, while the respective clump value is
stored to the location pointed by "clump".  Additionally, the
bitmap_get_value8 and bitmap_set_value8 functions are introduced to
respectively get and set an 8-bit value in a bitmap memory region.

[gustavo@embeddedor.com: fix potential sign-extension overflow]
  Link: http://lkml.kernel.org/r/20191015184657.GA26541@embeddedor
[akpm@linux-foundation.org: s/ULL/UL/, per Joe]
[vilhelm.gray@gmail.com: add for_each_set_clump8 documentation]
  Link: http://lkml.kernel.org/r/20191016161825.301082-1-vilhelm.gray@gmail.com
Link: http://lkml.kernel.org/r/893c3b4f03266c9496137cc98ac2b1bd27f92c73.1570641097.git.vilhelm.gray@gmail.com
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Suggested-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Suggested-by: Lukas Wunner <lukas@wunner.de>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Phil Reid <preid@electromag.com.au>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Mathias Duckeck <m.duckeck@kunbus.de>
Cc: Morten Hein Tiljeset <morten.tiljeset@prevas.dk>
Cc: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-04 19:44:12 -08:00
Linus Torvalds 388c645a33 SPDX fix for 5.5-rc1
Here is a single SPDX fixup for 5.5-rc1
 
 It resolves an issue where we had missed a few .h files with the
 auto-tagging scripts because they had "GPL" text in strings within the
 file themselves.  This single patch fixes up the issue and provides the
 proper SPDX tags at the top of them as needed.
 
 This patch has been in linux-next for many many weeks now with no
 reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 
 iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCXebGqw8cZ3JlZ0Brcm9h
 aC5jb20ACgkQMUfUDdst+yn31wCePtjLIQCW2PCrub9zeZCqUJ62V0sAoK53hYv+
 f3LHw9fd2dzhNCcly7nW
 =MuKu
 -----END PGP SIGNATURE-----

Merge tag 'spdx-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx

Pull SPDX fix from Greg KH:
 "Here is a single SPDX fixup for 5.5-rc1

  It resolves an issue where we had missed a few .h files with the
  auto-tagging scripts because they had "GPL" text in strings within the
  file themselves. This single patch fixes up the issue and provides the
  proper SPDX tags at the top of them as needed.

  This patch has been in linux-next for many many weeks now with no
  reported issues"

* tag 'spdx-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx:
  export,module: add SPDX GPL-2.0 license identifier to headers with no license
2019-12-03 14:20:21 -08:00
Linus Torvalds c3bed3b20e pci-v5.5-changes
-----BEGIN PGP SIGNATURE-----
 
 iQJIBAABCgAyFiEEgMe7l+5h9hnxdsnuWYigwDrT+vwFAl3leXUUHGJoZWxnYWFz
 QGdvb2dsZS5jb20ACgkQWYigwDrT+vyY3g/9FAVVdPEaadNtAhQ/zIxcjozDovKq
 0q7yOA3aTBTUoNEinm88an6p0dcC4gNKtGukXmzVH2Hhxm9kLRdtpZGYY00tpLUB
 9rI7XsgwwHa+hLwsHbIs507sKGFGy5FLr0ChTTGLDEMppnEvjA2hZooYmcB/OgrC
 LlFcwbNKGOk/Si9u2bF2nLO0JDoVHnwzpF99saew/nqc7Lfj9e9IPZFom+VjPBUh
 AOvRp2H7uBN+WQlpLeFeMDDoeXh34lX0kYqIV/cVkXVnknDGYKV2CBTg2aeX7jd0
 QiPHZh6zlW8zNQgaCZRiBAbatVEOnRMRJ++yiqB8hBYp1LMXm6kJ01YSQpXkugoY
 Vp9dtzzTARWV/XkKwD4brw9ZEmIDnO+Ed2x2VbUkPJVcXAvzSQWAx82IU0Iuqmcb
 9qr6U2Zf/Xk5aFlGPYVH8QOG+QqzIbZNRQ7NlhDlITyW4P6QPu0mw374yYP2wDGL
 sP5YSS3YGa0sQcEgDtVnd4z+WTZI4AwXLPaeaLkDhdfHp2FsERUY4TrPs33J99xw
 og4EyokVFzjYzlnBPU6WWn7LL+jj5ccXkL3MA4DR4FJOnNGHh7NXfQUH56rrgsq7
 F9/8shL5DuTbQkde1uSyUG9Iq/RigVLlV5DQavFm3dSXvZi0E16t5alC5URNTzk7
 at8Bogn53QhlmYc=
 =uUXw
 -----END PGP SIGNATURE-----

Merge tag 'pci-v5.5-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Enumeration:

   - Warn if a host bridge has no NUMA info (Yunsheng Lin)

   - Add PCI_STD_NUM_BARS for the number of standard BARs (Denis
     Efremov)

  Resource management:

   - Fix boot-time Embedded Controller GPE storm caused by incorrect
     resource assignment after ACPI Bus Check Notification (Mika
     Westerberg)

   - Protect pci_reassign_bridge_resources() against concurrent
     addition/removal (Benjamin Herrenschmidt)

   - Fix bridge dma_ranges resource list cleanup (Rob Herring)

   - Add "pci=hpmmiosize" and "pci=hpmmioprefsize" parameters to control
     the MMIO and prefetchable MMIO window sizes of hotplug bridges
     independently (Nicholas Johnson)

   - Fix MMIO/MMIO_PREF window assignment that assigned more space than
     desired (Nicholas Johnson)

   - Only enforce bus numbers from bridge EA if the bridge has EA
     devices downstream (Subbaraya Sundeep)

   - Consolidate DT "dma-ranges" parsing and convert all host drivers to
     use shared parsing (Rob Herring)

  Error reporting:

   - Restore AER capability after resume (Mayurkumar Patel)

   - Add PoisonTLPBlocked AER counter (Rajat Jain)

   - Use for_each_set_bit() to simplify AER code (Andy Shevchenko)

   - Fix AER kernel-doc (Andy Shevchenko)

   - Add "pcie_ports=dpc-native" parameter to allow native use of DPC
     even if platform didn't grant control over AER (Olof Johansson)

  Hotplug:

   - Avoid returning prematurely from sysfs requests to enable or
     disable a PCIe hotplug slot (Lukas Wunner)

   - Don't disable interrupts twice when suspending hotplug ports (Mika
     Westerberg)

   - Fix deadlocks when PCIe ports are hot-removed while suspended (Mika
     Westerberg)

  Power management:

   - Remove unnecessary ASPM locking (Bjorn Helgaas)

   - Add support for disabling L1 PM Substates (Heiner Kallweit)

   - Allow re-enabling Clock PM after it has been disabled (Heiner
     Kallweit)

   - Add sysfs attributes for controlling ASPM link states (Heiner
     Kallweit)

   - Remove CONFIG_PCIEASPM_DEBUG, including "link_state" and "clk_ctl"
     sysfs files (Heiner Kallweit)

   - Avoid AMD FCH XHCI USB PME# from D0 defect that prevents wakeup on
     USB 2.0 or 1.1 connect events (Kai-Heng Feng)

   - Move power state check out of pci_msi_supported() (Bjorn Helgaas)

   - Fix incorrect MSI-X masking on resume and revert related nvme quirk
     for Kingston NVME SSD running FW E8FK11.T (Jian-Hong Pan)

   - Always return devices to D0 when thawing to fix hibernation with
     drivers like mlx4 that used legacy power management (previously we
     only did it for drivers with new power management ops) (Dexuan Cui)

   - Clear PCIe PME Status even for legacy power management (Bjorn
     Helgaas)

   - Fix PCI PM documentation errors (Bjorn Helgaas)

   - Use dev_printk() for more power management messages (Bjorn Helgaas)

   - Apply D2 delay as milliseconds, not microseconds (Bjorn Helgaas)

   - Convert xen-platform from legacy to generic power management (Bjorn
     Helgaas)

   - Removed unused .resume_early() and .suspend_late() legacy power
     management hooks (Bjorn Helgaas)

   - Rearrange power management code for clarity (Rafael J. Wysocki)

   - Decode power states more clearly ("4" or "D4" really refers to
     "D3cold") (Bjorn Helgaas)

   - Notice when reading PM Control register returns an error (~0)
     instead of interpreting it as being in D3hot (Bjorn Helgaas)

   - Add missing link delays required by the PCIe spec (Mika Westerberg)

  Virtualization:

   - Move pci_prg_resp_pasid_required() to CONFIG_PCI_PRI (Bjorn
     Helgaas)

   - Allow VFs to use PRI (the PF PRI is shared by the VFs, but the code
     previously didn't recognize that) (Kuppuswamy Sathyanarayanan)

   - Allow VFs to use PASID (the PF PASID capability is shared by the
     VFs, but the code previously didn't recognize that) (Kuppuswamy
     Sathyanarayanan)

   - Disconnect PF and VF ATS enablement, since ATS in PFs and
     associated VFs can be enabled independently (Kuppuswamy
     Sathyanarayanan)

   - Cache PRI and PASID capability offsets (Kuppuswamy Sathyanarayanan)

   - Cache the PRI PRG Response PASID Required bit (Bjorn Helgaas)

   - Consolidate ATS declarations in linux/pci-ats.h (Krzysztof
     Wilczynski)

   - Remove unused PRI and PASID stubs (Bjorn Helgaas)

   - Removed unnecessary EXPORT_SYMBOL_GPL() from ATS, PRI, and PASID
     interfaces that are only used by built-in IOMMU drivers (Bjorn
     Helgaas)

   - Hide PRI and PASID state restoration functions used only inside the
     PCI core (Bjorn Helgaas)

   - Add a DMA alias quirk for the Intel VCA NTB (Slawomir Pawlowski)

   - Serialize sysfs sriov_numvfs reads vs writes (Pierre Crégut)

   - Update Cavium ACS quirk for ThunderX2 and ThunderX3 (George
     Cherian)

   - Fix the UPDCR register address in the Intel ACS quirk (Steffen
     Liebergeld)

   - Unify ACS quirk implementations (Bjorn Helgaas)

  Amlogic Meson host bridge driver:

   - Fix meson PERST# GPIO polarity problem (Remi Pommarel)

   - Add DT bindings for Amlogic Meson G12A (Neil Armstrong)

   - Fix meson clock names to match DT bindings (Neil Armstrong)

   - Add meson support for Amlogic G12A SoC with separate shared PHY
     (Neil Armstrong)

   - Add meson extended PCIe PHY functions for Amlogic G12A USB3+PCIe
     combo PHY (Neil Armstrong)

   - Add arm64 DT for Amlogic G12A PCIe controller node (Neil Armstrong)

   - Add commented-out description of VIM3 USB3/PCIe mux in arm64 DT
     (Neil Armstrong)

  Broadcom iProc host bridge driver:

   - Invalidate iProc PAXB address mapping before programming it
     (Abhishek Shah)

   - Fix iproc-msi and mvebu __iomem annotations (Ben Dooks)

  Cadence host bridge driver:

   - Refactor Cadence PCIe host controller to use as a library for both
     host and endpoint (Tom Joseph)

  Freescale Layerscape host bridge driver:

   - Add layerscape LS1028a support (Xiaowei Bao)

  Intel VMD host bridge driver:

   - Add VMD bus 224-255 restriction decode (Jon Derrick)

   - Add VMD 8086:9A0B device ID (Jon Derrick)

   - Remove Keith from VMD maintainer list (Keith Busch)

  Marvell ARMADA 3700 / Aardvark host bridge driver:

   - Use LTSSM state to build link training flag since Aardvark doesn't
     implement the Link Training bit (Remi Pommarel)

   - Delay before training Aardvark link in case PERST# was asserted
     before the driver probe (Remi Pommarel)

   - Fix Aardvark issues with Root Control reads and writes (Remi
     Pommarel)

   - Don't rely on jiffies in Aardvark config access path since
     interrupts may be disabled (Remi Pommarel)

   - Fix Aardvark big-endian support (Grzegorz Jaszczyk)

  Marvell ARMADA 370 / XP host bridge driver:

   - Make mvebu_pci_bridge_emul_ops static (Ben Dooks)

  Microsoft Hyper-V host bridge driver:

   - Add hibernation support for Hyper-V virtual PCI devices (Dexuan
     Cui)

   - Track Hyper-V pci_protocol_version per-hbus, not globally (Dexuan
     Cui)

   - Avoid kmemleak false positive on hv hbus buffer (Dexuan Cui)

  Mobiveil host bridge driver:

   - Change mobiveil csr_read()/write() function names that conflict
     with riscv arch functions (Kefeng Wang)

  NVIDIA Tegra host bridge driver:

   - Fix Tegra CLKREQ dependency programming (Vidya Sagar)

  Renesas R-Car host bridge driver:

   - Remove unnecessary header include from rcar (Andrew Murray)

   - Tighten register index checking for rcar inbound range programming
     (Marek Vasut)

   - Fix rcar inbound range alignment calculation to improve packing of
     multiple entries (Marek Vasut)

   - Update rcar MACCTLR setting to match documentation (Yoshihiro
     Shimoda)

   - Clear bit 0 of MACCTLR before PCIETCTLR.CFINIT per manual
     (Yoshihiro Shimoda)

   - Add Marek Vasut and Yoshihiro Shimoda as R-Car maintainers (Simon
     Horman)

  Rockchip host bridge driver:

   - Make rockchip 0V9 and 1V8 power regulators non-optional (Robin
     Murphy)

  Socionext UniPhier host bridge driver:

   - Set uniphier to host (RC) mode always (Kunihiko Hayashi)

  Endpoint drivers:

   - Fix endpoint driver sign extension problem when shifting page
     number to phys_addr_t (Alan Mikhak)

  Misc:

   - Add NumaChip SPDX header (Krzysztof Wilczynski)

   - Replace EXTRA_CFLAGS with ccflags-y (Krzysztof Wilczynski)

   - Remove unused includes (Krzysztof Wilczynski)

   - Removed unused sysfs attribute groups (Ben Dooks)

   - Remove PTM and ASPM dependencies on PCIEPORTBUS (Bjorn Helgaas)

   - Add PCIe Link Control 2 register field definitions to replace magic
     numbers in AMDGPU and Radeon CIK/SI (Bjorn Helgaas)

   - Fix incorrect Link Control 2 Transmit Margin usage in AMDGPU and
     Radeon CIK/SI PCIe Gen3 link training (Bjorn Helgaas)

   - Use pcie_capability_read_word() instead of pci_read_config_word()
     in AMDGPU and Radeon CIK/SI (Frederick Lawler)

   - Remove unused pci_irq_get_node() Greg Kroah-Hartman)

   - Make asm/msi.h mandatory and simplify PCI_MSI_IRQ_DOMAIN Kconfig
     (Palmer Dabbelt, Michal Simek)

   - Read all 64 bits of Switchtec part_event_bitmap (Logan Gunthorpe)

   - Fix erroneous intel-iommu dependency on CONFIG_AMD_IOMMU (Bjorn
     Helgaas)

   - Fix bridge emulation big-endian support (Grzegorz Jaszczyk)

   - Fix dwc find_next_bit() usage (Niklas Cassel)

   - Fix pcitest.c fd leak (Hewenliang)

   - Fix typos and comments (Bjorn Helgaas)

   - Fix Kconfig whitespace errors (Krzysztof Kozlowski)"

* tag 'pci-v5.5-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (160 commits)
  PCI: Remove PCI_MSI_IRQ_DOMAIN architecture whitelist
  asm-generic: Make msi.h a mandatory include/asm header
  Revert "nvme: Add quirk for Kingston NVME SSD running FW E8FK11.T"
  PCI/MSI: Fix incorrect MSI-X masking on resume
  PCI/MSI: Move power state check out of pci_msi_supported()
  PCI/MSI: Remove unused pci_irq_get_node()
  PCI: hv: Avoid a kmemleak false positive caused by the hbus buffer
  PCI: hv: Change pci_protocol_version to per-hbus
  PCI: hv: Add hibernation support
  PCI: hv: Reorganize the code in preparation of hibernation
  MAINTAINERS: Remove Keith from VMD maintainer
  PCI/ASPM: Remove PCIEASPM_DEBUG Kconfig option and related code
  PCI/ASPM: Add sysfs attributes for controlling ASPM link states
  PCI: Fix indentation
  drm/radeon: Prefer pcie_capability_read_word()
  drm/radeon: Replace numbers with PCI_EXP_LNKCTL2 definitions
  drm/radeon: Correct Transmit Margin masks
  drm/amdgpu: Prefer pcie_capability_read_word()
  PCI: uniphier: Set mode register to host mode
  drm/amdgpu: Replace numbers with PCI_EXP_LNKCTL2 definitions
  ...
2019-12-03 13:58:22 -08:00
Linus Torvalds 76bb8b0596 Kbuild updates for v5.5
- remove unneeded asm headers from hexagon, ia64
 
  - add 'dir-pkg' target, which works like 'tar-pkg' but skips archiving
 
  - add 'helpnewconfig' target, which shows help for new CONFIG options
 
  - support 'make nsdeps' for external modules
 
  - make rebuilds faster by deleting $(wildcard $^) checks
 
  - remove compile tests for kernel-space headers
 
  - refactor modpost to simplify modversion handling
 
  - make single target builds faster
 
  - optimize and clean up scripts/kallsyms.c
 
  - refactor various Makefiles and scripts
 -----BEGIN PGP SIGNATURE-----
 
 iQJJBAABCgAzFiEEbmPs18K1szRHjPqEPYsBB53g2wYFAl3lKCUVHG1hc2FoaXJv
 eUBrZXJuZWwub3JnAAoJED2LAQed4NsGu9sP/iTW/RjDxbAsu0aP8jFqzLK/xKB/
 NQn/+dD76TjEmjgew9AXszf2rJL+ixKVymGM08FV59Bbguvi8XmAB/QXK21Sjb5j
 rVl3N97TWNkvXM+QJyly23G2UtbubRSPo3g+e70BZrw3lcmrsK+sAmTOL5KtIrNX
 9BHM803JwqsMJyvBwTBBw3UFeeBqb38Qx6gmigfSihuDf6pvjoVDKskpsDno3wX7
 rdiXYxAsKQLQ/P2ym/bV/Oqe90RqRtV/2/WCpLshlwHkiM9huflv6GjgCkkbAx5H
 N3TSptlS7l/2B/XKHgA5ALjHjUlxTGBzLLoevarCd8loKcQXFlgx+vd3nM/WJlHJ
 x9UpTklDwGP9eUBsa9W980tEyUVsFGMAC8EcTdW6NN2IRtuCOSA5N2FYYt8/SDd0
 2b3PhElTJIp4pTWSYN6JZxB1R8n/YBgxLqOJ6N2U6B9CdKFUCHlwGH23QfN89km/
 WEMP85bsaab/dnyxbwelkoYYYyPgUHsC13AbpkHdrDxMbAGO+G1PwpHxC6ErF2en
 wRGrcUxWTfHRykO5aJIQtCB9b1fv73134mTzB5fTYd6GtjepGBSBCO9xb2Iy4sc9
 Y+nHVVDUrihvSOpJgqh677PcLDutOZR8fFCoc1ZMDAbBsDvrb0Qsee6oEidj98xc
 5kXp9YZh/tdh/tdo
 =zUaB
 -----END PGP SIGNATURE-----

Merge tag 'kbuild-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - remove unneeded asm headers from hexagon, ia64

 - add 'dir-pkg' target, which works like 'tar-pkg' but skips archiving

 - add 'helpnewconfig' target, which shows help for new CONFIG options

 - support 'make nsdeps' for external modules

 - make rebuilds faster by deleting $(wildcard $^) checks

 - remove compile tests for kernel-space headers

 - refactor modpost to simplify modversion handling

 - make single target builds faster

 - optimize and clean up scripts/kallsyms.c

 - refactor various Makefiles and scripts

* tag 'kbuild-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (59 commits)
  MAINTAINERS: update Kbuild/Kconfig maintainer's email address
  scripts/kallsyms: remove redundant initializers
  scripts/kallsyms: put check_symbol_range() calls close together
  scripts/kallsyms: make check_symbol_range() void function
  scripts/kallsyms: move ignored symbol types to is_ignored_symbol()
  scripts/kallsyms: move more patterns to the ignored_prefixes array
  scripts/kallsyms: skip ignored symbols very early
  scripts/kallsyms: add const qualifiers where possible
  scripts/kallsyms: make find_token() return (unsigned char *)
  scripts/kallsyms: replace prefix_underscores_count() with strspn()
  scripts/kallsyms: add sym_name() to mitigate cast ugliness
  scripts/kallsyms: remove unneeded length check for prefix matching
  scripts/kallsyms: remove redundant is_arm_mapping_symbol()
  scripts/kallsyms: set relative_base more effectively
  scripts/kallsyms: shrink table before sorting it
  scripts/kallsyms: fix definitely-lost memory leak
  scripts/kallsyms: remove unneeded #ifndef ARRAY_SIZE
  kbuild: make single target builds even faster
  modpost: respect the previous export when 'exported twice' is warned
  modpost: do not set ->preloaded for symbols from Module.symvers
  ...
2019-12-02 17:35:04 -08:00
Linus Torvalds 596cf45cbf Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton:
 "Incoming:

   - a small number of updates to scripts/, ocfs2 and fs/buffer.c

   - most of MM

  I still have quite a lot of material (mostly not MM) staged after
  linux-next due to -next dependencies. I'll send those across next week
  as the preprequisites get merged up"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (135 commits)
  mm/page_io.c: annotate refault stalls from swap_readpage
  mm/Kconfig: fix trivial help text punctuation
  mm/Kconfig: fix indentation
  mm/memory_hotplug.c: remove __online_page_set_limits()
  mm: fix typos in comments when calling __SetPageUptodate()
  mm: fix struct member name in function comments
  mm/shmem.c: cast the type of unmap_start to u64
  mm: shmem: use proper gfp flags for shmem_writepage()
  mm/shmem.c: make array 'values' static const, makes object smaller
  userfaultfd: require CAP_SYS_PTRACE for UFFD_FEATURE_EVENT_FORK
  fs/userfaultfd.c: wp: clear VM_UFFD_MISSING or VM_UFFD_WP during userfaultfd_register()
  userfaultfd: wrap the common dst_vma check into an inlined function
  userfaultfd: remove unnecessary WARN_ON() in __mcopy_atomic_hugetlb()
  userfaultfd: use vma_pagesize for all huge page size calculation
  mm/madvise.c: use PAGE_ALIGN[ED] for range checking
  mm/madvise.c: replace with page_size() in madvise_inject_error()
  mm/mmap.c: make vma_merge() comment more easy to understand
  mm/hwpoison-inject: use DEFINE_DEBUGFS_ATTRIBUTE to define debugfs fops
  autonuma: reduce cache footprint when scanning page tables
  autonuma: fix watermark checking in migrate_balanced_pgdat()
  ...
2019-12-01 20:36:41 -08:00
Thomas Hellstrom 625110b5e9 mm/memory.c: fix a huge pud insertion race during faulting
A huge pud page can theoretically be faulted in racing with pmd_alloc()
in __handle_mm_fault().  That will lead to pmd_alloc() returning an
invalid pmd pointer.

Fix this by adding a pud_trans_unstable() function similar to
pmd_trans_unstable() and check whether the pud is really stable before
using the pmd pointer.

Race:
  Thread 1:             Thread 2:                 Comment
  create_huge_pud()                               Fallback - not taken.
                        create_huge_pud()         Taken.
  pmd_alloc()                                     Returns an invalid pointer.

This will result in user-visible huge page data corruption.

Note that this was caught during a code audit rather than a real
experienced problem.  It looks to me like the only implementation that
currently creates huge pud pagetable entries is dev_dax_huge_fault()
which doesn't appear to care much about private (COW) mappings or
write-tracking which is, I believe, a prerequisite for create_huge_pud()
falling back on thread 1, but not in thread 2.

Link: http://lkml.kernel.org/r/20191115115808.21181-2-thomas_os@shipmail.org
Fixes: a00cc7d9dd ("mm, x86: add support for PUD-sized transparent hugepages")
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-01 06:29:19 -08:00
Thomas Hellstrom bf1a12a809 mm: move the backup x_devmap() functions to asm-generic/pgtable.h
The asm-generic/pgtable.h include file appears to be the correct place for
the backup x_devmap() inline functions.  Moving them here is also
necessary if we want to include x_devmap() in the [pmd|pud]_unstable
functions.  So move the x_devmap() functions to asm-generic/pgtable.h

Link: http://lkml.kernel.org/r/20191115115808.21181-1-thomas_os@shipmail.org
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-01 06:29:19 -08:00
Vineet Gupta f2400abc78 asm-generic/mm: stub out p{4,u}d_clear_bad() if __PAGETABLE_P{4,U}D_FOLDED
This came up when removing __ARCH_HAS_5LEVEL_HACK for ARC as code bloat.
With this patch we see the following code reduction.

| bloat-o-meter2 vmlinux-D-elide-p4d_free_tlb vmlinux-E-elide-p?d_clear_bad
| add/remove: 0/2 grow/shrink: 0/0 up/down: 0/-40 (-40)
| function                                     old     new   delta
| pud_clear_bad                                 20       -     -20
| p4d_clear_bad                                 20       -     -20
| Total: Before=4136930, After=4136890, chg -1.000000%

Link: http://lkml.kernel.org/r/20191016162400.14796-6-vgupta@synopsys.com
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Will Deacon <will@kernel.org>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>
Cc: Nick Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-01 06:29:19 -08:00
Vineet Gupta 3d14f1110a asm-generic/tlb: stub out pmd_free_tlb() if nopmd
This came up when removing __ARCH_HAS_5LEVEL_HACK for ARC as code bloat.
With this patch we see the following code reduction.

| bloat-o-meter2 vmlinux-E-elide-p?d_clear_bad vmlinux-F-elide-pmd_free_tlb
| add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-112 (-112)
| function                                     old     new   delta
| free_pgd_range                               422     310    -112
| Total: Before=4137042, After=4136930, chg -1.000000%

Note that pmd folding can be tricky: In 2-level setup (where pmd is
conceptually folded) most pmd routines are valid and refer to upper levels.
In this patch we can, but see next patch for example where we can't

Link: http://lkml.kernel.org/r/20191016162400.14796-5-vgupta@synopsys.com
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Nick Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-01 06:29:19 -08:00
Vineet Gupta bffd972347 asm-generic/tlb: stub out p4d_free_tlb() if nop4d ...
... independent of __ARCH_HAS_5LEVEL_HACK

This came up when removing __ARCH_HAS_5LEVEL_HACK for ARC as code bloat.
With this patch we see the following code reduction

| bloat-o-meter2 vmlinux-C-elide-pud_free_tlb vmlinux-D-elide-p4d_free_tlb
| add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-104 (-104)
| function                                     old     new   delta
| free_pgd_range                               552     422    -130
| Total: Before=4137172, After=4137042, chg -1.000000%

Link: http://lkml.kernel.org/r/20191016162400.14796-4-vgupta@synopsys.com
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Nick Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-01 06:29:19 -08:00
Vineet Gupta b08861d10b asm-generic/tlb: stub out pud_free_tlb() if nopud ...
... independent of __ARCH_HAS_4LEVEL_HACK

This came up when removing __ARCH_HAS_5LEVEL_HACK for ARC as code bloat.
With this patch we see the following code reduction

| bloat-o-meter2 vmlinux-B-elide-ARCH_USE_5LEVEL_HACK vmlinux-C-elide-pud_free_tlb
| add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-104 (-104)
| function                                     old     new   delta
| free_pgd_range                               656     552    -104
| Total: Before=4137276, After=4137172, chg -1.000000%

Note: The primary change is alternate defintion for pud_free_tlb() but
while there also removed empty stubs for __pud_free_tlb, which is anyhow
called only from pud_free_tlb()

Link: http://lkml.kernel.org/r/20191016162400.14796-3-vgupta@synopsys.com
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Nick Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-01 06:29:19 -08:00
Linus Torvalds 0dd0c8f7db - Support for new VMBus protocols (Andrea Parri).
- Hibernation support (Dexuan Cui).
 - Latency testing framework (Branden Bonaby).
 - Decoupling Hyper-V page size from guest page size (Himadri Pandya).
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEE4n5dijQDou9mhzu83qZv95d3LNwFAl3f5YIACgkQ3qZv95d3
 LNzBww/8Cpv/BnOs2cp56OhC+2++3YlWfmxGnvQb9h52weElgr1AZF33lAynp8BZ
 YssOcDnS/G2iAkNDffbQA7s3WTwIjP1weJibOeKbtcXp4SuhNR3gnJafufNddNDv
 bw8ZReLQV7hy3sHb3OUx0aJk5Mssp0N9ZpxRilyIpLELPfVp63gFebq6s1MQYljk
 BAiNO4SKqsGQGZApt2F4Cc3hX2wU2ZfiDm6SifXiLYITGnvilIn7XFIht+2jJBWS
 CdzRoGXcwhQhlj68XWlc89SOzJb7vVUMO1sr84psfbQ2LbhJU8lfJKRJ4b4lR07Z
 Uv5FYxjr14S65fv7DkzCfWU+uPN/sObG4pPXihlfqcTraOvYLQ6/x8cw+9tGZg4H
 aTtnF40hnO81aKsvPAeIsSzVkoyPaSrt7KKhk+Bw/5EUDTTNp6EbIuL4xwnKt6Rt
 2UpA5HM9guQqNb6OZrjlpZfJgd9bNP4CZLBTfOukmnZpONKr2Wv3wubcwQJ8ibQc
 1WZ5SfN2Wmg999Ski7j9qzHk0tWJxa6SX+2NLEHRKxy2nJSJ1zlAr//bznMyMgH/
 yKPDaSkOFoy0aqiTKV2WzuOY6FGXTrSo5vq8YAgYRgp3xB+5+7zLeqlj3ipXhLYE
 HH/eqB27eSnvi0jpub4TbszGJG0o4Z1aYx3aHYYqrOfWX/A5Vls=
 =oJGE
 -----END PGP SIGNATURE-----

Merge tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

Pull Hyper-V updates from Sasha Levin:

 - support for new VMBus protocols (Andrea Parri)

 - hibernation support (Dexuan Cui)

 - latency testing framework (Branden Bonaby)

 - decoupling Hyper-V page size from guest page size (Himadri Pandya)

* tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: (22 commits)
  Drivers: hv: vmbus: Fix crash handler reset of Hyper-V synic
  drivers/hv: Replace binary semaphore with mutex
  drivers: iommu: hyperv: Make HYPERV_IOMMU only available on x86
  HID: hyperv: Add the support of hibernation
  hv_balloon: Add the support of hibernation
  x86/hyperv: Implement hv_is_hibernation_supported()
  Drivers: hv: balloon: Remove dependencies on guest page size
  Drivers: hv: vmbus: Remove dependencies on guest page size
  x86: hv: Add function to allocate zeroed page for Hyper-V
  Drivers: hv: util: Specify ring buffer size using Hyper-V page size
  Drivers: hv: Specify receive buffer size using Hyper-V page size
  tools: hv: add vmbus testing tool
  drivers: hv: vmbus: Introduce latency testing
  video: hyperv: hyperv_fb: Support deferred IO for Hyper-V frame buffer driver
  video: hyperv: hyperv_fb: Obtain screen resolution from Hyper-V host
  hv_netvsc: Add the support of hibernation
  hv_sock: Add the support of hibernation
  video: hyperv_fb: Add the support of hibernation
  scsi: storvsc: Add the support of hibernation
  Drivers: hv: vmbus: Add module parameter to cap the VMBus version
  ...
2019-11-30 14:50:51 -08:00
Linus Torvalds 7794b1d418 powerpc updates for 5.5
Highlights:
 
  - Infrastructure for secure boot on some bare metal Power9 machines. The
    firmware support is still in development, so the code here won't actually
    activate secure boot on any existing systems.
 
  - A change to xmon (our crash handler / pseudo-debugger) to restrict it to
    read-only mode when the kernel is lockdown'ed, otherwise it's trivial to drop
    into xmon and modify kernel data, such as the lockdown state.
 
  - Support for KASLR on 32-bit BookE machines (Freescale / NXP).
 
  - Fixes for our flush_icache_range() and __kernel_sync_dicache() (VDSO) to work
    with memory ranges >4GB.
 
  - Some reworks of the pseries CMM (Cooperative Memory Management) driver to
    make it behave more like other balloon drivers and enable some cleanups of
    generic mm code.
 
  - A series of fixes to our hardware breakpoint support to properly handle
    unaligned watchpoint addresses.
 
 Plus a bunch of other smaller improvements, fixes and cleanups.
 
 Thanks to:
   Alastair D'Silva, Andrew Donnellan, Aneesh Kumar K.V, Anthony Steinhauser,
   Cédric Le Goater, Chris Packham, Chris Smart, Christophe Leroy, Christopher M.
   Riedl, Christoph Hellwig, Claudio Carvalho, Daniel Axtens, David Hildenbrand,
   Deb McLemore, Diana Craciun, Eric Richter, Geert Uytterhoeven, Greg
   Kroah-Hartman, Greg Kurz, Gustavo L. F. Walbon, Hari Bathini, Harish, Jason
   Yan, Krzysztof Kozlowski, Leonardo Bras, Mathieu Malaterre, Mauro S. M.
   Rodrigues, Michal Suchanek, Mimi Zohar, Nathan Chancellor, Nathan Lynch, Nayna
   Jain, Nick Desaulniers, Oliver O'Halloran, Qian Cai, Rasmus Villemoes, Ravi
   Bangoria, Sam Bobroff, Santosh Sivaraj, Scott Wood, Thomas Huth, Tyrel
   Datwyler, Vaibhav Jain, Valentin Longchamp, YueHaibing.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCAAxFiEEJFGtCPCthwEv2Y/bUevqPMjhpYAFAl3hBycTHG1wZUBlbGxl
 cm1hbi5pZC5hdQAKCRBR6+o8yOGlgApBEACk91MEQDYJ9MF9I6uN+85qb5p4pMsp
 rGzqnpt+XFidbDAc3eP63pYfIDSo3jtkQ2YL7shAnDOTvkO0md+Vqkl9Aq/G6FIf
 lDBlwbgkXMSxS/O2Lpvfn4NZAoK6dKmiV55LSgfliM62X3e2Saeg6TR55wBTgJ6/
 SlYPDwZfcVHOAiFS3UmfB+hkiIZk+AI5Zr5VAZvT2ZmeH36yAWkq4JgJI1uAk6m1
 /7iCnlfUjx/nl/BhnA3kjjmAgGCJ5s/WuVgwFMz47XpMBWGBhLWpMh/NqDTFb8ca
 kpiVQoVPQe2xyO3pL/kOwBy6sii26ftfHDhLKMy1hJdEhVQzS5LerPIMeh1qsU8Q
 hV/Cj+jfsrS/vBDOehj3jwx93t+861PmTOqgLnpYQ6Ltrt+2B/74+fufGMHE1kI3
 Ffo7xvNw4sw6bSziDxDFqUx2P1dFN5D5EJsJsYM98ekkVAAkzNqCDRvfD2QI8Pif
 VXWPYXqtNJTrVPJA0D7Yfo9FDNwhANd0f1zi7r/U5mVXBFUyKOlGqTQSkXgMrVeK
 3I7wHPOVGgdA5UUkfcd3pcuqsY081U9E//o5PUfj8ybO5JCwly8NoatbG+xHmKia
 a72uJT8MjCo9mGCHKDrwi9l/kqms6ZSv8RP+yMhGuB52YoiGc6PpVyab5jXIUd1N
 yTtBlC0YGW1JYw==
 =JHzg
 -----END PGP SIGNATURE-----

Merge tag 'powerpc-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
 "Highlights:

   - Infrastructure for secure boot on some bare metal Power9 machines.
     The firmware support is still in development, so the code here
     won't actually activate secure boot on any existing systems.

   - A change to xmon (our crash handler / pseudo-debugger) to restrict
     it to read-only mode when the kernel is lockdown'ed, otherwise it's
     trivial to drop into xmon and modify kernel data, such as the
     lockdown state.

   - Support for KASLR on 32-bit BookE machines (Freescale / NXP).

   - Fixes for our flush_icache_range() and __kernel_sync_dicache()
     (VDSO) to work with memory ranges >4GB.

   - Some reworks of the pseries CMM (Cooperative Memory Management)
     driver to make it behave more like other balloon drivers and enable
     some cleanups of generic mm code.

   - A series of fixes to our hardware breakpoint support to properly
     handle unaligned watchpoint addresses.

  Plus a bunch of other smaller improvements, fixes and cleanups.

  Thanks to: Alastair D'Silva, Andrew Donnellan, Aneesh Kumar K.V,
  Anthony Steinhauser, Cédric Le Goater, Chris Packham, Chris Smart,
  Christophe Leroy, Christopher M. Riedl, Christoph Hellwig, Claudio
  Carvalho, Daniel Axtens, David Hildenbrand, Deb McLemore, Diana
  Craciun, Eric Richter, Geert Uytterhoeven, Greg Kroah-Hartman, Greg
  Kurz, Gustavo L. F. Walbon, Hari Bathini, Harish, Jason Yan, Krzysztof
  Kozlowski, Leonardo Bras, Mathieu Malaterre, Mauro S. M. Rodrigues,
  Michal Suchanek, Mimi Zohar, Nathan Chancellor, Nathan Lynch, Nayna
  Jain, Nick Desaulniers, Oliver O'Halloran, Qian Cai, Rasmus Villemoes,
  Ravi Bangoria, Sam Bobroff, Santosh Sivaraj, Scott Wood, Thomas Huth,
  Tyrel Datwyler, Vaibhav Jain, Valentin Longchamp, YueHaibing"

* tag 'powerpc-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (144 commits)
  powerpc/fixmap: fix crash with HIGHMEM
  x86/efi: remove unused variables
  powerpc: Define arch_is_kernel_initmem_freed() for lockdep
  powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp
  powerpc: Avoid clang warnings around setjmp and longjmp
  powerpc: Don't add -mabi= flags when building with Clang
  powerpc: Fix Kconfig indentation
  powerpc/fixmap: don't clear fixmap area in paging_init()
  selftests/powerpc: spectre_v2 test must be built 64-bit
  powerpc/powernv: Disable native PCIe port management
  powerpc/kexec: Move kexec files into a dedicated subdir.
  powerpc/32: Split kexec low level code out of misc_32.S
  powerpc/sysdev: drop simple gpio
  powerpc/83xx: map IMMR with a BAT.
  powerpc/32s: automatically allocate BAT in setbat()
  powerpc/ioremap: warn on early use of ioremap()
  powerpc: Add support for GENERIC_EARLY_IOREMAP
  powerpc/fixmap: Use __fix_to_virt() instead of fix_to_virt()
  powerpc/8xx: use the fixmapped IMMR in cpm_reset()
  powerpc/8xx: add __init to cpm1 init functions
  ...
2019-11-30 14:35:43 -08:00
Linus Torvalds a308a71022 generic ioremap support
- clean up various obsolete ioremap and iounmap variants
  - add a new generic ioremap implementation and switch csky, nds32 and
    riscv over to it
 -----BEGIN PGP SIGNATURE-----
 
 iQI/BAABCgApFiEEgdbnc3r/njty3Iq9D55TZVIEUYMFAl3cKcsLHGhjaEBsc3Qu
 ZGUACgkQD55TZVIEUYO1CRAAwFQigsbi0CqqshPWnP0owKV+HA4Xfz/lQZsd7SM/
 BVXhKyDJQum6gp73dW025HCfjidTknsbdCUIP/LNUgAnop3lOlnB31/munDnJJ1H
 6hB1pc+zB9VgbOe0A6TxtxPRm5aE33k1hZIZS99lOh7mY3FvF7mbkkbVoCjdS3Cq
 a9bTX+X+esfUQ5GgaIc2zmz2GLkyFXIeVGs8/CoOX58ESCWQcVZrsQRompo4SgrI
 jqwf47NzdmK8hW4mZ+jdQUiWiAmNs5+2om7Bvi/deFAIFUo1/hLHvQzqEGramq/j
 5SPHax2gWAN3uWYP91QISkUAJWFydwgmUDoTO1M04ov4xLuBrqIQmc43tLjHo2UT
 RwMozWJWN+gkB9zTIboqMPi2qcuDaWcCij7LwHl5zLxPTcOKsrALarL55BQ8MipQ
 x6fpvskrQQvlArNTsRWFRUq0mCtkzE3wMZ9RR3AIETQL2hlAzB1S4gzhD+Z6WTYY
 pXNgkunonVGxwyN/7iJTEl/mvF/+MynGcWqhrwHZLqncyhn/WJJ2USH3nAD1+yjp
 v8v6UUeMXIjUsGAyfTjXy/WXAfwRuSC038AAFcmWKDdh08h4XvPHRficT4U8wr34
 7WzGizHP9f1CqrhYL/4exhPY9X2Yb7HhsFd0bZGG0rRvSillPUp0b8s++m12QuQU
 +VY=
 =ooiA
 -----END PGP SIGNATURE-----

Merge tag 'ioremap-5.5' of git://git.infradead.org/users/hch/ioremap

Pull generic ioremap support from Christoph Hellwig:
 "This adds the remaining bits for an entirely generic ioremap and
  iounmap to lib/ioremap.c. To facilitate that, it cleans up the giant
  mess of weird ioremap variants we had with no users outside the arch
  code.

  For now just the three newest ports use the code, but there is more
  than a handful others that can be converted without too much work.

  Summary:

   - clean up various obsolete ioremap and iounmap variants

   - add a new generic ioremap implementation and switch csky, nds32 and
     riscv over to it"

* tag 'ioremap-5.5' of git://git.infradead.org/users/hch/ioremap: (21 commits)
  nds32: use generic ioremap
  csky: use generic ioremap
  csky: remove ioremap_cache
  riscv: use the generic ioremap code
  lib: provide a simple generic ioremap implementation
  sh: remove __iounmap
  nios2: remove __iounmap
  hexagon: remove __iounmap
  m68k: rename __iounmap and mark it static
  arch: rely on asm-generic/io.h for default ioremap_* definitions
  asm-generic: don't provide ioremap for CONFIG_MMU
  asm-generic: ioremap_uc should behave the same with and without MMU
  xtensa: clean up ioremap
  x86: Clean up ioremap()
  parisc: remove __ioremap
  nios2: remove __ioremap
  alpha: remove the unused __ioremap wrapper
  hexagon: clean up ioremap
  ia64: rename ioremap_nocache to ioremap_uc
  unicore32: remove ioremap_cached
  ...
2019-11-28 10:57:12 -08:00
Linus Torvalds 95f1fa9e34 New tracing features:
- PERAMAENT flag to ftrace_ops when attaching a callback to a function
    As /proc/sys/kernel/ftrace_enabled when set to zero will disable all
    attached callbacks in ftrace, this has a detrimental impact on live
    kernel tracing, as it disables all that it patched. If a ftrace_ops
    is registered to ftrace with the PERMANENT flag set, it will prevent
    ftrace_enabled from being disabled, and if ftrace_enabled is already
    disabled, it will prevent a ftrace_ops with PREMANENT flag set from
    being registered.
 
  - New register_ftrace_direct(). As eBPF would like to register its own
    trampolines to be called by the ftrace nop locations directly,
    without going through the ftrace trampoline, this function has been
    added. This allows for eBPF trampolines to live along side of
    ftrace, perf, kprobe and live patching. It also utilizes the ftrace
    enabled_functions file that keeps track of functions that have been
    modified in the kernel, to allow for security auditing.
 
  - Allow for kernel internal use of ftrace instances. Subsystems in
    the kernel can now create and destroy their own tracing instances
    which allows them to have their own tracing buffer, and be able
    to record events without worrying about other users from writing over
    their data.
 
  - New seq_buf_hex_dump() that lets users use the hex_dump() in their
    seq_buf usage.
 
  - Notifications now added to tracing_max_latency to allow user space
    to know when a new max latency is hit by one of the latency tracers.
 
  - Wider spread use of generic compare operations for use of bsearch and
    friends.
 
  - More synthetic event fields may be defined (32 up from 16)
 
  - Use of xarray for architectures with sparse system calls, for the
    system call trace events.
 
 This along with small clean ups and fixes.
 -----BEGIN PGP SIGNATURE-----
 
 iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCXdwv4BQccm9zdGVkdEBn
 b29kbWlzLm9yZwAKCRAp5XQQmuv6qnB5AP91vsdHQjwE1+/UWG/cO+qFtKvn2QJK
 QmBRIJNH/s+1TAD/fAOhgw+ojSK3o/qc+NpvPTEW9AEwcJL1wacJUn+XbQc=
 =ztql
 -----END PGP SIGNATURE-----

Merge tag 'trace-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:
 "New tracing features:

   - New PERMANENT flag to ftrace_ops when attaching a callback to a
     function.

     As /proc/sys/kernel/ftrace_enabled when set to zero will disable
     all attached callbacks in ftrace, this has a detrimental impact on
     live kernel tracing, as it disables all that it patched. If a
     ftrace_ops is registered to ftrace with the PERMANENT flag set, it
     will prevent ftrace_enabled from being disabled, and if
     ftrace_enabled is already disabled, it will prevent a ftrace_ops
     with PREMANENT flag set from being registered.

   - New register_ftrace_direct().

     As eBPF would like to register its own trampolines to be called by
     the ftrace nop locations directly, without going through the ftrace
     trampoline, this function has been added. This allows for eBPF
     trampolines to live along side of ftrace, perf, kprobe and live
     patching. It also utilizes the ftrace enabled_functions file that
     keeps track of functions that have been modified in the kernel, to
     allow for security auditing.

   - Allow for kernel internal use of ftrace instances.

     Subsystems in the kernel can now create and destroy their own
     tracing instances which allows them to have their own tracing
     buffer, and be able to record events without worrying about other
     users from writing over their data.

   - New seq_buf_hex_dump() that lets users use the hex_dump() in their
     seq_buf usage.

   - Notifications now added to tracing_max_latency to allow user space
     to know when a new max latency is hit by one of the latency
     tracers.

   - Wider spread use of generic compare operations for use of bsearch
     and friends.

   - More synthetic event fields may be defined (32 up from 16)

   - Use of xarray for architectures with sparse system calls, for the
     system call trace events.

  This along with small clean ups and fixes"

* tag 'trace-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (51 commits)
  tracing: Enable syscall optimization for MIPS
  tracing: Use xarray for syscall trace events
  tracing: Sample module to demonstrate kernel access to Ftrace instances.
  tracing: Adding new functions for kernel access to Ftrace instances
  tracing: Fix Kconfig indentation
  ring-buffer: Fix typos in function ring_buffer_producer
  ftrace: Use BIT() macro
  ftrace: Return ENOTSUPP when DYNAMIC_FTRACE_WITH_DIRECT_CALLS is not configured
  ftrace: Rename ftrace_graph_stub to ftrace_stub_graph
  ftrace: Add a helper function to modify_ftrace_direct() to allow arch optimization
  ftrace: Add helper find_direct_entry() to consolidate code
  ftrace: Add another check for match in register_ftrace_direct()
  ftrace: Fix accounting bug with direct->count in register_ftrace_direct()
  ftrace/selftests: Fix spelling mistake "wakeing" -> "waking"
  tracing: Increase SYNTH_FIELDS_MAX for synthetic_events
  ftrace/samples: Add a sample module that implements modify_ftrace_direct()
  ftrace: Add modify_ftrace_direct()
  tracing: Add missing "inline" in stub function of latency_fsnotify()
  tracing: Remove stray tab in TRACE_EVAL_MAP_FILE's help text
  tracing: Use seq_buf_hex_dump() to dump buffers
  ...
2019-11-27 11:42:01 -08:00
Michal Simek a1b39bae16 asm-generic: Make msi.h a mandatory include/asm header
msi.h is generic for all architectures except x86, which has its own
version.  Enabling MSI by adding msi.h to every architecture's Kbuild is
just an additional step which doesn't need to be done.

Make msi.h mandatory in the asm-generic/Kbuild so we don't have to do it
for each architecture.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Link: https://lore.kernel.org/r/c991669e29a79b1a8e28c3b4b3a125801a693de8.1571983829.git.michal.simek@xilinx.com
Tested-by: Paul Walmsley <paul.walmsley@sifive.com> # build only, rv32/rv64
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Waiman Long <longman@redhat.com>
Acked-by: Paul Walmsley <paul.walmsley@sifive.com> # arch/riscv
2019-11-26 13:14:11 -06:00
Linus Torvalds 1d87200446 Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 asm updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Cross-arch changes to move the linker sections for NOTES and
     EXCEPTION_TABLE into the RO_DATA area, where they belong on most
     architectures. (Kees Cook)

   - Switch the x86 linker fill byte from x90 (NOP) to 0xcc (INT3), to
     trap jumps into the middle of those padding areas instead of
     sliding execution. (Kees Cook)

   - A thorough cleanup of symbol definitions within x86 assembler code.
     The rather randomly named macros got streamlined around a
     (hopefully) straightforward naming scheme:

        SYM_START(name, linkage, align...)
        SYM_END(name, sym_type)

        SYM_FUNC_START(name)
        SYM_FUNC_END(name)

        SYM_CODE_START(name)
        SYM_CODE_END(name)

        SYM_DATA_START(name)
        SYM_DATA_END(name)

     etc - with about three times of these basic primitives with some
     label, local symbol or attribute variant, expressed via postfixes.

     No change in functionality intended. (Jiri Slaby)

   - Misc other changes, cleanups and smaller fixes"

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (67 commits)
  x86/entry/64: Remove pointless jump in paranoid_exit
  x86/entry/32: Remove unused resume_userspace label
  x86/build/vdso: Remove meaningless CFLAGS_REMOVE_*.o
  m68k: Convert missed RODATA to RO_DATA
  x86/vmlinux: Use INT3 instead of NOP for linker fill bytes
  x86/mm: Report actual image regions in /proc/iomem
  x86/mm: Report which part of kernel image is freed
  x86/mm: Remove redundant address-of operators on addresses
  xtensa: Move EXCEPTION_TABLE to RO_DATA segment
  powerpc: Move EXCEPTION_TABLE to RO_DATA segment
  parisc: Move EXCEPTION_TABLE to RO_DATA segment
  microblaze: Move EXCEPTION_TABLE to RO_DATA segment
  ia64: Move EXCEPTION_TABLE to RO_DATA segment
  h8300: Move EXCEPTION_TABLE to RO_DATA segment
  c6x: Move EXCEPTION_TABLE to RO_DATA segment
  arm64: Move EXCEPTION_TABLE to RO_DATA segment
  alpha: Move EXCEPTION_TABLE to RO_DATA segment
  x86/vmlinux: Move EXCEPTION_TABLE to RO_DATA segment
  x86/vmlinux: Actually use _etext for the end of the text segment
  vmlinux.lds.h: Allow EXCEPTION_TABLE to live in RO_DATA
  ...
2019-11-26 10:42:40 -08:00
Linus Torvalds 4ba380f616 arm64 updates for 5.5:
- On ARMv8 CPUs without hardware updates of the access flag, avoid
   failing cow_user_page() on PFN mappings if the pte is old. The patches
   introduce an arch_faults_on_old_pte() macro, defined as false on x86.
   When true, cow_user_page() makes the pte young before attempting
   __copy_from_user_inatomic().
 
 - Covert the synchronous exception handling paths in
   arch/arm64/kernel/entry.S to C.
 
 - FTRACE_WITH_REGS support for arm64.
 
 - ZONE_DMA re-introduced on arm64 to support Raspberry Pi 4
 
 - Several kselftest cases specific to arm64, together with a MAINTAINERS
   update for these files (moved to the ARM64 PORT entry).
 
 - Workaround for a Neoverse-N1 erratum where the CPU may fetch stale
   instructions under certain conditions.
 
 - Workaround for Cortex-A57 and A72 errata where the CPU may
   speculatively execute an AT instruction and associate a VMID with the
   wrong guest page tables (corrupting the TLB).
 
 - Perf updates for arm64: additional PMU topologies on HiSilicon
   platforms, support for CCN-512 interconnect, AXI ID filtering in the
   IMX8 DDR PMU, support for the CCPI2 uncore PMU in ThunderX2.
 
 - GICv3 optimisation to avoid a heavy barrier when accessing the
   ICC_PMR_EL1 register.
 
 - ELF HWCAP documentation updates and clean-up.
 
 - SMC calling convention conduit code clean-up.
 
 - KASLR diagnostics printed during boot
 
 - NVIDIA Carmel CPU added to the KPTI whitelist
 
 - Some arm64 mm clean-ups: use generic free_initrd_mem(), remove stale
   macro, simplify calculation in __create_pgd_mapping(), typos.
 
 - Kconfig clean-ups: CMDLINE_FORCE to depend on CMDLINE, choice for
   endinanness to help with allmodconfig.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEE5RElWfyWxS+3PLO2a9axLQDIXvEFAl3YJswACgkQa9axLQDI
 XvFwYg//aTGhNLew3ADgW2TYal7LyqetRROixPBrzqHLu2A8No1+QxHMaKxpZVyf
 pt25tABuLtPHql3qBzE0ltmfbLVsPj/3hULo404EJb9HLRfUnVGn7gcPkc+p4YAr
 IYkYPXJbk6OlJ84vI+4vXmDEF12bWCqamC9qZ+h99qTpMjFXFO17DSJ7xQ8Xic3A
 HHgCh4uA7gpTVOhLxaS6KIw+AZNYwvQxLXch2+wj6agbGX79uw9BeMhqVXdkPq8B
 RTDJpOdS970WOT4cHWOkmXwsqqGRqgsgyu+bRUJ0U72+0y6MX0qSHIUnVYGmNc5q
 Dtox4rryYLvkv/hbpkvjgVhv98q3J1mXt/CalChWB5dG4YwhJKN2jMiYuoAvB3WS
 6dR7Dfupgai9gq1uoKgBayS2O6iFLSa4g58vt3EqUBqmM7W7viGFPdLbuVio4ycn
 CNF2xZ8MZR6Wrh1JfggO7Hc11EJdSqESYfHO6V/pYB4pdpnqJLDoriYHXU7RsZrc
 HvnrIvQWKMwNbqBvpNbWvK5mpBMMX2pEienA3wOqKNH7MbepVsG+npOZTVTtl9tN
 FL0ePb/mKJu/2+gW8ntiqYn7EzjKprRmknOiT2FjWWo0PxgJ8lumefuhGZZbaOWt
 /aTAeD7qKd/UXLKGHF/9v3q4GEYUdCFOXP94szWVPyLv+D9h8L8=
 =TPL9
 -----END PGP SIGNATURE-----

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Catalin Marinas:
 "Apart from the arm64-specific bits (core arch and perf, new arm64
  selftests), it touches the generic cow_user_page() (reviewed by
  Kirill) together with a macro for x86 to preserve the existing
  behaviour on this architecture.

  Summary:

   - On ARMv8 CPUs without hardware updates of the access flag, avoid
     failing cow_user_page() on PFN mappings if the pte is old. The
     patches introduce an arch_faults_on_old_pte() macro, defined as
     false on x86. When true, cow_user_page() makes the pte young before
     attempting __copy_from_user_inatomic().

   - Covert the synchronous exception handling paths in
     arch/arm64/kernel/entry.S to C.

   - FTRACE_WITH_REGS support for arm64.

   - ZONE_DMA re-introduced on arm64 to support Raspberry Pi 4

   - Several kselftest cases specific to arm64, together with a
     MAINTAINERS update for these files (moved to the ARM64 PORT entry).

   - Workaround for a Neoverse-N1 erratum where the CPU may fetch stale
     instructions under certain conditions.

   - Workaround for Cortex-A57 and A72 errata where the CPU may
     speculatively execute an AT instruction and associate a VMID with
     the wrong guest page tables (corrupting the TLB).

   - Perf updates for arm64: additional PMU topologies on HiSilicon
     platforms, support for CCN-512 interconnect, AXI ID filtering in
     the IMX8 DDR PMU, support for the CCPI2 uncore PMU in ThunderX2.

   - GICv3 optimisation to avoid a heavy barrier when accessing the
     ICC_PMR_EL1 register.

   - ELF HWCAP documentation updates and clean-up.

   - SMC calling convention conduit code clean-up.

   - KASLR diagnostics printed during boot

   - NVIDIA Carmel CPU added to the KPTI whitelist

   - Some arm64 mm clean-ups: use generic free_initrd_mem(), remove
     stale macro, simplify calculation in __create_pgd_mapping(), typos.

   - Kconfig clean-ups: CMDLINE_FORCE to depend on CMDLINE, choice for
     endinanness to help with allmodconfig"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (93 commits)
  arm64: Kconfig: add a choice for endianness
  kselftest: arm64: fix spelling mistake "contiguos" -> "contiguous"
  arm64: Kconfig: make CMDLINE_FORCE depend on CMDLINE
  MAINTAINERS: Add arm64 selftests to the ARM64 PORT entry
  arm64: kaslr: Check command line before looking for a seed
  arm64: kaslr: Announce KASLR status on boot
  kselftest: arm64: fake_sigreturn_misaligned_sp
  kselftest: arm64: fake_sigreturn_bad_size
  kselftest: arm64: fake_sigreturn_duplicated_fpsimd
  kselftest: arm64: fake_sigreturn_missing_fpsimd
  kselftest: arm64: fake_sigreturn_bad_size_for_magic0
  kselftest: arm64: fake_sigreturn_bad_magic
  kselftest: arm64: add helper get_current_context
  kselftest: arm64: extend test_init functionalities
  kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht]
  kselftest: arm64: mangle_pstate_invalid_daif_bits
  kselftest: arm64: mangle_pstate_invalid_compat_toggle and common utils
  kselftest: arm64: extend toplevel skeleton Makefile
  drivers/perf: hisi: update the sccl_id/ccl_id for certain HiSilicon platform
  arm64: mm: reserve CMA and crashkernel in ZONE_DMA32
  ...
2019-11-25 15:39:19 -08:00
Dexuan Cui b96f86534f x86/hyperv: Implement hv_is_hibernation_supported()
The API will be used by the hv_balloon and hv_vmbus drivers.

Balloon up/down and hot-add of memory must not be active if the user
wants the Linux VM to support hibernation, because they are incompatible
with hibernation according to Hyper-V team, e.g. upon suspend the
balloon VSP doesn't save any info about the ballooned-out pages (if any);
so, after Linux resumes, Linux balloon VSC expects that the VSP will
return the pages if Linux is under memory pressure, but the VSP will
never do that, since the VSP thinks it never stole the pages from the VM.

So, if the user wants Linux VM to support hibernation, Linux must forbid
balloon up/down and hot-add, and the only functionality of the balloon VSC
driver is reporting the VM's memory pressure to the host.

Ideally, when Linux detects that the user wants it to support hibernation,
the balloon VSC should tell the VSP that it does not support ballooning
and hot-add. However, the current version of the VSP requires the VSC
should support these capabilities, otherwise the capability negotiation
fails and the VSC can not load at all, so with the later changes to the
VSC driver, Linux VM still reports to the VSP that the VSC supports these
capabilities, but the VSC ignores the VSP's requests of balloon up/down
and hot add, and reports an error to the VSP, when applicable. BTW, in
the future the balloon VSP driver will allow the VSC to not support the
capabilities of balloon up/down and hot add.

The ACPI S4 state is not a must for hibernation to work, because Linux is
able to hibernate as long as the system can shut down. However in practice
we decide to artificially use the presence of the virtual ACPI S4 state as
an indicator of the user's intent of using hibernation, because Linux VM
must find a way to know if the user wants to use the hibernation feature
or not.

By default, Hyper-V does not enable the virtual ACPI S4 state; on recent
Hyper-V hosts (e.g. RS5, 19H1), the administrator is able to enable the
state for a VM by WMI commands.

Once all the vmbus and VSC patches for the hibernation feature are
accepted, an extra patch will be submitted to forbid hibernation if the
virtual ACPI S4 state is absent, i.e. hv_is_hibernation_supported() is
false.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-11-21 20:10:45 -05:00
Steven Rostedt (VMware) 46f9469247 ftrace: Rename ftrace_graph_stub to ftrace_stub_graph
The ftrace_graph_stub was created and points to ftrace_stub as a way to
assign the functon graph tracer function pointer to a stub function with a
different prototype than what ftrace_stub has and not trigger the C
verifier. The ftrace_graph_stub was created via the linker script
vmlinux.lds.h. Unfortunately, powerpc already uses the name
ftrace_graph_stub for its internal implementation of the function graph
tracer, and even though powerpc would still build, the change via the linker
script broke function tracer on powerpc from working.

By using the name ftrace_stub_graph, which does not exist anywhere else in
the kernel, this should not be a problem.

Link: https://lore.kernel.org/r/1573849732.5937.136.camel@lca.pw

Fixes: b83b43ffc6 ("fgraph: Fix function type mismatches of ftrace_graph_return using ftrace_stub")
Reorted-by: Qian Cai <cai@lca.pw>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-11-18 11:42:16 -05:00
Marco Elver e75a6795ed locking/atomics, kcsan: Add KCSAN instrumentation
This adds KCSAN instrumentation to atomic-instrumented.h.

Signed-off-by: Marco Elver <elver@google.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2019-11-16 07:23:15 -08:00
Steven Rostedt (VMware) b83b43ffc6 fgraph: Fix function type mismatches of ftrace_graph_return using ftrace_stub
The C compiler is allowing more checks to make sure that function pointers
are assigned to the correct prototype function. Unfortunately, the function
graph tracer uses a special name with its assigned ftrace_graph_return
function pointer that maps to a stub function used by the function tracer
(ftrace_stub). The ftrace_graph_return variable is compared to the
ftrace_stub in some archs to know if the function graph tracer is enabled or
not. This means we can not just simply create a new function stub that
compares it without modifying all the archs.

Instead, have the linker script create a function_graph_stub that maps to
ftrace_stub, and this way we can define the prototype for it to match the
prototype of ftrace_graph_return, and make the compiler checks all happy!

Link: http://lkml.kernel.org/r/20191015090055.789a0aed@gandalf.local.home

Cc: linux-sh@vger.kernel.org
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc:  Rich Felker <dalias@libc.org>
Reported-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-11-14 13:13:43 -05:00
Masahiro Yamada bf49d9dd6f export,module: add SPDX GPL-2.0 license identifier to headers with no license
Commit b24413180f ("License cleanup: add SPDX GPL-2.0 license
identifier to files with no license") took care of a lot of files
without any license information.

These headers were not processed by the tool perhaps because they
contain "GPL" in the code.

I do not see any license boilerplate in them, so they fall back to
GPL version 2 only, which is the project default.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Link: https://lore.kernel.org/r/20191018045053.8424-1-yamada.masahiro@socionext.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-11-14 11:36:53 +08:00
Christoph Hellwig 80b0ca98f9 lib: provide a simple generic ioremap implementation
A lot of architectures reuse the same simple ioremap implementation, so
start lifting the most simple variant to lib/ioremap.c.  It provides
ioremap_prot and iounmap, plus a default ioremap that uses prot_noncached,
although that can be overridden by asm/io.h.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Palmer Dabbelt <palmer@dabbelt.com>
2019-11-11 21:18:20 +01:00
Christoph Hellwig d092a87073 arch: rely on asm-generic/io.h for default ioremap_* definitions
Various architectures that use asm-generic/io.h still defined their
own default versions of ioremap_nocache, ioremap_wt and ioremap_wc
that point back to plain ioremap directly or indirectly.  Remove these
definitions and rely on asm-generic/io.h instead.  For this to work
the backup ioremap_* defintions needs to be changed to purely cpp
macros instea of inlines to cover for architectures like openrisc
that only define ioremap after including <asm-generic/io.h>.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Palmer Dabbelt <palmer@dabbelt.com>
2019-11-11 21:18:19 +01:00
Christoph Hellwig 97c9801a15 asm-generic: don't provide ioremap for CONFIG_MMU
All MMU-enabled ports have a non-trivial ioremap and should thus provide
the prototype for their implementation instead of providing a generic
one unless a different symbol is not defined.  Note that this only
affects sparc32 nds32 as all others do provide their own version.

Also update the kerneldoc comments in asm-generic/io.h to explain the
situation around the default ioremap* implementations correctly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2019-11-11 21:18:19 +01:00
Christoph Hellwig e97133959a asm-generic: ioremap_uc should behave the same with and without MMU
Whatever reason there is for the existence of ioremap_uc, and the fact
that it returns NULL by default on architectures with an MMU applies
equally to nommu architectures, so don't provide different defaults.

In practice the difference is meaningless as the only portable driver
that uses ioremap_uc is atyfb which probably doesn't show up on nommu
devices.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Palmer Dabbelt <palmer@dabbelt.com>
2019-11-11 21:18:12 +01:00