Commit Graph

125267 Commits

Author SHA1 Message Date
David S. Miller 4f6deb8cba sparc: Don't leak context bits into thread->fault_address
On pre-Niagara systems, we fetch the fault address on data TLB
exceptions from the TLB_TAG_ACCESS register.  But this register also
contains the context ID assosciated with the fault in the low 13 bits
of the register value.

This propagates into current_thread_info()->fault_address and can
cause trouble later on.

So clear the low 13-bits out of the TLB_TAG_ACCESS value in the cases
where it matters.

Reported-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-27 17:50:26 -07:00
Linus Torvalds 7ae0ae4a02 spi: Updates for v4.8
Quite a lot of cleanup and maintainence work going on this release in
 various drivers, and also a fix for a nasty locking issue in the core:
 
  - A fix for locking issues when external drivers explicitly locked the
    bus with spi_bus_lock() - we were using the same lock to both control
    access to the physical bus in multi-threaded I/O operations and
    exclude multiple callers.  Confusion between these two caused us to
    have scenarios where we were dropping locks.  These are fixed by
    splitting into two separate locks like should have been done
    originally, making everything much clearer and correct.
  - Support for DMA in spi_flash_read().
  - Support for instantiating spidev on ACPI systems, including some test
    devices used in Windows validation.
  - Use of the core DMA mapping functionality in the McSPI driver.
  - Start of support for ThunderX SPI controllers, involving a very big
    set of changes to the Cavium driver.
  - Support for Braswell, Exynos 5433, Kaby Lake, Merrifield, RK3036,
    RK3228, RK3368 controllers.
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Merge tag 'spi-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "Quite a lot of cleanup and maintainence work going on this release in
  various drivers, and also a fix for a nasty locking issue in the core:

   - A fix for locking issues when external drivers explicitly locked
     the bus with spi_bus_lock() - we were using the same lock to both
     control access to the physical bus in multi-threaded I/O operations
     and exclude multiple callers.

     Confusion between these two caused us to have scenarios where we
     were dropping locks.  These are fixed by splitting into two
     separate locks like should have been done originally, making
     everything much clearer and correct.

   - Support for DMA in spi_flash_read().

   - Support for instantiating spidev on ACPI systems, including some
     test devices used in Windows validation.

   - Use of the core DMA mapping functionality in the McSPI driver.

   - Start of support for ThunderX SPI controllers, involving a very big
     set of changes to the Cavium driver.

   - Support for Braswell, Exynos 5433, Kaby Lake, Merrifield, RK3036,
     RK3228, RK3368 controllers"

* tag 'spi-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (64 commits)
  spi: Split bus and I/O locking
  spi: octeon: Split driver into Octeon specific and common parts
  spi: octeon: Move include file from arch/mips to drivers/spi
  spi: octeon: Put register offsets into a struct
  spi: octeon: Store system clock freqency in struct octeon_spi
  spi: octeon: Convert driver to use readq()/writeq() functions
  spi: pic32-sqi: fixup wait_for_completion_timeout return handling
  spi: pic32: fixup wait_for_completion_timeout return handling
  spi: rockchip: limit transfers to (64K - 1) bytes
  spi: xilinx: Return IRQ_NONE if no interrupts were detected
  spi: xilinx: Handle errors from platform_get_irq()
  spi: s3c64xx: restore removed comments
  spi: s3c64xx: add Exynos5433 compatible for ioclk handling
  spi: s3c64xx: use error code from clk_prepare_enable()
  spi: s3c64xx: rename goto labels to meaningful names
  spi: s3c64xx: document the clocks and the clock-name property
  spi: s3c64xx: add exynos5433 spi compatible
  spi: s3c64xx: fix reference leak to master in s3c64xx_spi_remove()
  spi: spi-sh: Remove deprecated create_singlethread_workqueue
  spi: spi-topcliff-pch: Remove deprecated create_singlethread_workqueue
  ...
2016-07-27 14:11:43 -07:00
Linus Torvalds 607e11ab66 New LED class driver:
- LED driver for TI LP3952 6-Channel Color LED
 
 LED core improvements:
 - Only descend into leds directory when CONFIG_NEW_LEDS is set
 - Add no-op gpio_led_register_device when LED subsystem is disabled
 - MAINTAINERS: Add file patterns for led device tree bindings
 
 LED Trigger core improvements:
 - return error if invalid trigger name is provided via sysfs
 
 LED class drivers improvements
 - is31fl32xx: define complete i2c_device_id table
 - is31fl32xx: fix typo in id and match table names
 - leds-gpio: Set of_node for created LED devices
 - pca9532: Add device tree support
 
 Conversion of IDE trigger to common disk trigger:
 - leds: convert IDE trigger to common disk trigger
 - leds: documentation: 'ide-disk' to 'disk-activity'
 - unicore32: use the new LED disk activity trigger
 - parisc: use the new LED disk activity trigger
 - mips: use the new LED disk activity trigger
 - arm: use the new LED disk activity trigger
 - powerpc: use the new LED disk activity trigger
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Merge tag 'leds_for_4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds

Pull LED updates from Jacek Anaszewski:
 "New LED class driver:
   - LED driver for TI LP3952 6-Channel Color LED

  LED core improvements:
   - Only descend into leds directory when CONFIG_NEW_LEDS is set
   - Add no-op gpio_led_register_device when LED subsystem is disabled
   - MAINTAINERS: Add file patterns for led device tree bindings

  LED Trigger core improvements:
   - return error if invalid trigger name is provided via sysfs

  LED class drivers improvements
   - is31fl32xx: define complete i2c_device_id table
   - is31fl32xx: fix typo in id and match table names
   - leds-gpio: Set of_node for created LED devices
   - pca9532: Add device tree support

  Conversion of IDE trigger to common disk trigger:
   - leds: convert IDE trigger to common disk trigger
   - leds: documentation: 'ide-disk' to 'disk-activity'
   - unicore32: use the new LED disk activity trigger
   - parisc: use the new LED disk activity trigger
   - mips: use the new LED disk activity trigger
   - arm: use the new LED disk activity trigger
   - powerpc: use the new LED disk activity trigger"

* tag 'leds_for_4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
  leds: is31fl32xx: define complete i2c_device_id table
  leds: is31fl32xx: fix typo in id and match table names
  leds: LED driver for TI LP3952 6-Channel Color LED
  leds: leds-gpio: Set of_node for created LED devices
  leds: triggers: return error if invalid trigger name is provided via sysfs
  leds: Only descend into leds directory when CONFIG_NEW_LEDS is set
  leds: Add no-op gpio_led_register_device when LED subsystem is disabled
  unicore32: use the new LED disk activity trigger
  parisc: use the new LED disk activity trigger
  mips: use the new LED disk activity trigger
  arm: use the new LED disk activity trigger
  powerpc: use the new LED disk activity trigger
  leds: documentation: 'ide-disk' to 'disk-activity'
  leds: convert IDE trigger to common disk trigger
  leds: pca9532: Add device tree support
  MAINTAINERS: Add file patterns for led device tree bindings
2016-07-27 14:03:52 -07:00
Linus Torvalds c79a14defb * Altera Arria10 ethernet FIFO buffer support (Thor Thayer)
* Minor cleanups
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Merge tag 'edac_for_4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp

Pull EDAC updates from Borislav Petkov:
 "This last cycle, Thor was busy adding Arria10 eth FIFO support to the
  altera_edac driver along with other improvements.  We have two
  cleanups/fixes too.

  Summary:

   - Altera Arria10 ethernet FIFO buffer support (Thor Thayer)

   - Minor cleanups"

* tag 'edac_for_4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
  ARM: dts: Add Arria10 Ethernet EDAC devicetree entry
  EDAC, altera: Add Arria10 Ethernet EDAC support
  EDAC, altera: Add Arria10 ECC memory init functions
  Documentation: dt: socfpga: Add Arria10 Ethernet binding
  EDAC, altera: Drop some ifdeffery
  EDAC, altera: Add panic flag check to A10 IRQ
  EDAC, altera: Check parent status for Arria10 EDAC block
  EDAC, altera: Make all private data structures static
  EDAC: Correct channel count limit
  EDAC, amd64_edac: Init opstate at the proper time during init
  EDAC, altera: Handle Arria10 SDRAM child node
  EDAC, altera: Add ECC Manager IRQ controller support
  Documentation: dt: socfpga: Add interrupt-controller to ecc-manager
2016-07-27 13:40:47 -07:00
Linus Torvalds 6e8d666e92 Disable "maybe-uninitialized" warning globally
Several build configurations had already disabled this warning because
it generates a lot of false positives.  But some had not, and it was
still enabled for "allmodconfig" builds, for example.

Looking at the warnings produced, every single one I looked at was a
false positive, and the warnings are frequent enough (and big enough)
that they can easily hide real problems that you don't notice in the
noise generated by -Wmaybe-uninitialized.

The warning is good in theory, but this is a classic case of a warning
that causes more problems than the warning can solve.

If gcc gets better at avoiding false positives, we may be able to
re-enable this warning.  But as is, we're better off without it, and I
want to be able to see the *real* warnings.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-27 13:17:41 -07:00
Linus Torvalds 468fc7ed55 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:

 1) Unified UDP encapsulation offload methods for drivers, from
    Alexander Duyck.

 2) Make DSA binding more sane, from Andrew Lunn.

 3) Support QCA9888 chips in ath10k, from Anilkumar Kolli.

 4) Several workqueue usage cleanups, from Bhaktipriya Shridhar.

 5) Add XDP (eXpress Data Path), essentially running BPF programs on RX
    packets as soon as the device sees them, with the option to mirror
    the packet on TX via the same interface.  From Brenden Blanco and
    others.

 6) Allow qdisc/class stats dumps to run lockless, from Eric Dumazet.

 7) Add VLAN support to b53 and bcm_sf2, from Florian Fainelli.

 8) Simplify netlink conntrack entry layout, from Florian Westphal.

 9) Add ipv4 forwarding support to mlxsw spectrum driver, from Ido
    Schimmel, Yotam Gigi, and Jiri Pirko.

10) Add SKB array infrastructure and convert tun and macvtap over to it.
    From Michael S Tsirkin and Jason Wang.

11) Support qdisc packet injection in pktgen, from John Fastabend.

12) Add neighbour monitoring framework to TIPC, from Jon Paul Maloy.

13) Add NV congestion control support to TCP, from Lawrence Brakmo.

14) Add GSO support to SCTP, from Marcelo Ricardo Leitner.

15) Allow GRO and RPS to function on macsec devices, from Paolo Abeni.

16) Support MPLS over IPV4, from Simon Horman.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1622 commits)
  xgene: Fix build warning with ACPI disabled.
  be2net: perform temperature query in adapter regardless of its interface state
  l2tp: Correctly return -EBADF from pppol2tp_getname.
  net/mlx5_core/health: Remove deprecated create_singlethread_workqueue
  net: ipmr/ip6mr: update lastuse on entry change
  macsec: ensure rx_sa is set when validation is disabled
  tipc: dump monitor attributes
  tipc: add a function to get the bearer name
  tipc: get monitor threshold for the cluster
  tipc: make cluster size threshold for monitoring configurable
  tipc: introduce constants for tipc address validation
  net: neigh: disallow transition to NUD_STALE if lladdr is unchanged in neigh_update()
  MAINTAINERS: xgene: Add driver and documentation path
  Documentation: dtb: xgene: Add MDIO node
  dtb: xgene: Add MDIO node
  drivers: net: xgene: ethtool: Use phy_ethtool_gset and sset
  drivers: net: xgene: Use exported functions
  drivers: net: xgene: Enable MDIO driver
  drivers: net: xgene: Add backward compatibility
  drivers: net: phy: xgene: Add MDIO driver
  ...
2016-07-27 12:03:20 -07:00
Linus Torvalds 08fd8c1768 xen: features and fixes for 4.8-rc0
- ACPI support for guests on ARM platforms.
 - Generic steal time support for arm and x86.
 - Support cases where kernel cpu is not Xen VCPU number (e.g., if
   in-guest kexec is used).
 - Use the system workqueue instead of a custom workqueue in various
   places.
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Merge tag 'for-linus-4.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from David Vrabel:
 "Features and fixes for 4.8-rc0:

   - ACPI support for guests on ARM platforms.
   - Generic steal time support for arm and x86.
   - Support cases where kernel cpu is not Xen VCPU number (e.g., if
     in-guest kexec is used).
   - Use the system workqueue instead of a custom workqueue in various
     places"

* tag 'for-linus-4.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (47 commits)
  xen: add static initialization of steal_clock op to xen_time_ops
  xen/pvhvm: run xen_vcpu_setup() for the boot CPU
  xen/evtchn: use xen_vcpu_id mapping
  xen/events: fifo: use xen_vcpu_id mapping
  xen/events: use xen_vcpu_id mapping in events_base
  x86/xen: use xen_vcpu_id mapping when pointing vcpu_info to shared_info
  x86/xen: use xen_vcpu_id mapping for HYPERVISOR_vcpu_op
  xen: introduce xen_vcpu_id mapping
  x86/acpi: store ACPI ids from MADT for future usage
  x86/xen: update cpuid.h from Xen-4.7
  xen/evtchn: add IOCTL_EVTCHN_RESTRICT
  xen-blkback: really don't leak mode property
  xen-blkback: constify instance of "struct attribute_group"
  xen-blkfront: prefer xenbus_scanf() over xenbus_gather()
  xen-blkback: prefer xenbus_scanf() over xenbus_gather()
  xen: support runqueue steal time on xen
  arm/xen: add support for vm_assist hypercall
  xen: update xen headers
  xen-pciback: drop superfluous variables
  xen-pciback: short-circuit read path used for merging write values
  ...
2016-07-27 11:35:37 -07:00
Linus Torvalds e831101a73 arm64 updates for 4.8:
- Kexec support for arm64
 - Kprobes support
 - Expose MIDR_EL1 and REVIDR_EL1 CPU identification registers to sysfs
 - Trapping of user space cache maintenance operations and emulation in
   the kernel (CPU errata workaround)
 - Clean-up of the early page tables creation (kernel linear mapping, EFI
   run-time maps) to avoid splitting larger blocks (e.g. pmds) into
   smaller ones (e.g. ptes)
 - VDSO support for CLOCK_MONOTONIC_RAW in clock_gettime()
 - ARCH_HAS_KCOV enabled for arm64
 - Optimise IP checksum helpers
 - SWIOTLB optimisation to only allocate/initialise the buffer if the
   available RAM is beyond the 32-bit mask
 - Properly handle the "nosmp" command line argument
 - Fix for the initialisation of the CPU debug state during early boot
 - vdso-offsets.h build dependency workaround
 - Build fix when RANDOMIZE_BASE is enabled with MODULES off
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Catalin Marinas:

 - Kexec support for arm64

 - Kprobes support

 - Expose MIDR_EL1 and REVIDR_EL1 CPU identification registers to sysfs

 - Trapping of user space cache maintenance operations and emulation in
   the kernel (CPU errata workaround)

 - Clean-up of the early page tables creation (kernel linear mapping,
   EFI run-time maps) to avoid splitting larger blocks (e.g.  pmds) into
   smaller ones (e.g.  ptes)

 - VDSO support for CLOCK_MONOTONIC_RAW in clock_gettime()

 - ARCH_HAS_KCOV enabled for arm64

 - Optimise IP checksum helpers

 - SWIOTLB optimisation to only allocate/initialise the buffer if the
   available RAM is beyond the 32-bit mask

 - Properly handle the "nosmp" command line argument

 - Fix for the initialisation of the CPU debug state during early boot

 - vdso-offsets.h build dependency workaround

 - Build fix when RANDOMIZE_BASE is enabled with MODULES off

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (64 commits)
  arm64: arm: Fix-up the removal of the arm64 regs_query_register_name() prototype
  arm64: Only select ARM64_MODULE_PLTS if MODULES=y
  arm64: mm: run pgtable_page_ctor() on non-swapper translation table pages
  arm64: mm: make create_mapping_late() non-allocating
  arm64: Honor nosmp kernel command line option
  arm64: Fix incorrect per-cpu usage for boot CPU
  arm64: kprobes: Add KASAN instrumentation around stack accesses
  arm64: kprobes: Cleanup jprobe_return
  arm64: kprobes: Fix overflow when saving stack
  arm64: kprobes: WARN if attempting to step with PSTATE.D=1
  arm64: debug: remove unused local_dbg_{enable, disable} macros
  arm64: debug: remove redundant spsr manipulation
  arm64: debug: unmask PSTATE.D earlier
  arm64: localise Image objcopy flags
  arm64: ptrace: remove extra define for CPSR's E bit
  kprobes: Add arm64 case in kprobe example module
  arm64: Add kernel return probes support (kretprobes)
  arm64: Add trampoline code for kretprobes
  arm64: kprobes instruction simulation support
  arm64: Treat all entry code as non-kprobe-able
  ...
2016-07-27 11:16:05 -07:00
Linus Torvalds f9abf53af4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Pull tile architecture updates from Chris Metcalf:
 "A few stray changes"

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  tile: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO
  tile: support gcc 7 optimization to use __multi3
  tile 32-bit big-endian: fix bugs in syscall argument order
  tile: allow disabling CONFIG_EARLY_PRINTK
2016-07-27 10:54:11 -07:00
Borislav Petkov 4a1a8e1b8f x86/asm, x86/microcode: Add __PAGE_OFFSET_BASE define on 32-bit
... in order to avoid #ifdeffery in code computing the ASLR randomization
offset. Remove that #ifdeffery in the microcode loader.

Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nicolai Stange <nicstange@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Garnier <thgarnie@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160727120939.GA18911@nazgul.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-27 14:59:59 +02:00
Ingo Molnar df15929f8f Merge branch 'linus' into x86/microcode, to pick up merge window changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-27 12:35:35 +02:00
Andy Lutomirski 609c19a385 x86/ptrace: Stop setting TS_COMPAT in ptrace code
Setting TS_COMPAT in ptrace is wrong: if we happen to do it during
syscall entry, then we'll confuse seccomp and audit.  (The former
isn't a security problem: seccomp is currently entirely insecure if a
malicious ptracer is attached.)  As a minimal fix, this patch adds a
new flag TS_I386_REGS_POKED that handles the ptrace special case.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pedro Alves <palves@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/5383ebed38b39fa37462139e337aff7f2314d1ca.1469599803.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-27 11:09:43 +02:00
Catalin Marinas fd6380b750 arm64: arm: Fix-up the removal of the arm64 regs_query_register_name() prototype
Commit 0a8ea52c3e ("arm64: Add HAVE_REGS_AND_STACK_ACCESS_API
feature") inadvertently removed the arch/arm prototype instead of the
arm64 one introduced by the original patch. There should not be any
bisection issues since this function is not called from anywhere else
(it could as well be removed from arch/arm at some point).

Fixes: 0a8ea52c3e ("arm64: Add HAVE_REGS_AND_STACK_ACCESS_API feature")
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-27 08:15:42 +01:00
Linus Torvalds 0e06f5c0de Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton:

 - a few misc bits

 - ocfs2

 - most(?) of MM

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (125 commits)
  thp: fix comments of __pmd_trans_huge_lock()
  cgroup: remove unnecessary 0 check from css_from_id()
  cgroup: fix idr leak for the first cgroup root
  mm: memcontrol: fix documentation for compound parameter
  mm: memcontrol: remove BUG_ON in uncharge_list
  mm: fix build warnings in <linux/compaction.h>
  mm, thp: convert from optimistic swapin collapsing to conservative
  mm, thp: fix comment inconsistency for swapin readahead functions
  thp: update Documentation/{vm/transhuge,filesystems/proc}.txt
  shmem: split huge pages beyond i_size under memory pressure
  thp: introduce CONFIG_TRANSPARENT_HUGE_PAGECACHE
  khugepaged: add support of collapse for tmpfs/shmem pages
  shmem: make shmem_inode_info::lock irq-safe
  khugepaged: move up_read(mmap_sem) out of khugepaged_alloc_page()
  thp: extract khugepaged from mm/huge_memory.c
  shmem, thp: respect MADV_{NO,}HUGEPAGE for file mappings
  shmem: add huge pages support
  shmem: get_unmapped_area align huge page
  shmem: prepare huge= mount option and sysfs knob
  mm, rmap: account shmem thp pages
  ...
2016-07-26 19:55:54 -07:00
Linus Torvalds 6097d55e10 regulator: Updates for v4.8
A quiet regulator API release, a few new drivers and some fixes but
 nothing too notable.  There will also be some updates for the PWM
 regulator coming through the PWM tree which provide much smoother
 operation when taking over an already running PWM regulator after boot
 using some new PWM APIs.
 
  - Support for configuration of the initial suspend state from DT.
  - New drivers for Mediatek MT6323, Ricoh RN5T567 and X-Powers AXP809.
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Merge tag 'regulator-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator updates from Mark Brown:
 "A quiet regulator API release, a few new drivers and some fixes but
  nothing too notable.  There will also be some updates for the PWM
  regulator coming through the PWM tree which provide much smoother
  operation when taking over an already running PWM regulator after boot
  using some new PWM APIs.

  Summary:

   - Support for configuration of the initial suspend state from DT.

   - New drivers for Mediatek MT6323, Ricoh RN5T567 and X-Powers AXP809"

* tag 'regulator-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: (38 commits)
  regulator: da9053/52: Fix incorrectly stated minimum and maximum voltage limits
  regulator: mt6323: Constify struct regulator_ops
  regulator: mt6323: Fix module description
  regulator: mt6323: Add support for MT6323 regulator
  regulator: Add document for MT6323 regulator
  regulator: da9210: addition of device tree support
  regulator: act8865: Fix missing of_node_put() in act8865_pdata_from_dt()
  regulator: qcom_smd: Avoid overlapping linear voltage ranges
  regulator: s2mps11: Fix the voltage linear range for s2mps15
  regulator: pwm: Fix regulator ramp delay for continuous mode
  regulator: da9211: add descriptions for da9212/da9214
  mfd: rn5t618: Register restart handler
  mfd: rn5t618: Register power off callback optionally
  regulator: rn5t618: Add RN5T567 PMIC support
  mfd: rn5t618: Add Ricoh RN5T567 PMIC support
  ARM: dts: meson: minix-neo-x8: define PMIC as power controller
  regulator: tps65218: force set power-up/down strobe to 3 for dcdc3
  regulator: tps65218: Enable suspend configuration
  regulator: tps65217: Enable suspend configuration
  regulator: qcom_spmi: Add support for get_mode/set_mode on switches
  ...
2016-07-26 19:40:43 -07:00
Linus Torvalds 1cd04d293c This is the bulk of GPIO changes for the v4.8 kernel cycle.
Core changes:
 
 - The big item is of course the completion of the character
   device ABI. It has now replaced and surpassed the former
   unmaintainable sysfs ABI: we can now hammer (bitbang)
   individual lines or sets of lines and read individual lines
   or sets of lines from userspace, and we can also register
   to listen to GPIO events from userspace. As a tie-in we
   have two new tools in tools/gpio: gpio-hammer and
   gpio-event-mon that illustrate the proper use of the new
   ABI. As someone said: the wild west days of GPIO are now
   over.
 
 - Continued to remove the pointless
   ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB Kconfig symbols.
   I'm patching hexagon, openrisc, powerpc, sh, unicore,
   ia64 and microblaze. These are either ACKed by their
   maintainers or patched anyways after a grace period and
   no response from maintainers. Some archs (ARM) come in from
   their trees, and others (x86) are still not fixed, so I
   might send a second pull request to root it out later in
   this merge window, or just defer to v4.9.
 
 - The GPIO tools are moved to the tools build system.
 
 New drivers:
 
 - New driver for the MAX77620/MAX20024.
 
 - New driver for the Intel Merrifield.
 
 - Enabled PCA953x for the TI PCA9536.
 
 - Enabled PCA953x for the Intel Edison.
 
 - Enabled R8A7792 in the RCAR driver.
 
 Driver improvements:
 
 - The STMPE and F7188x now supports the .get_direction()
   callback.
 
 - The Xilinx driver supports setting multiple lines at
   once.
 
 - ACPI support for the Vulcan GPIO controller.
 
 - The MMIO GPIO driver supports device tree probing.
 
 - The Acer One 10 is supported through the _DEP ACPI
   attribute.
 
 Cleanups:
 
 - A major cleanup of the OF/DT support code. It is way
   easier to read and understand now, probably this improves
   performance too.
 
 - Drop a few redundant .owner assignments.
 
 - Remove CLPS711x boardfile support: we are 100% DT.
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Merge tag 'gpio-v4.8-1' 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 changes for the v4.8 kernel cycle.  The big
  news is the completion of the chardev ABI which I'm very happy about
  and apart from that it's an ordinary, quite busy cycle.  The details
  are below.

  The patches are tested in linux-next for some time, patches to other
  subsystem mostly have ACKs.

  I got overly ambitious with configureing lines as input for IRQ lines
  but it turns out that some controllers have their interrupt-enable and
  input-enabling in orthogonal settings so the assumption that all IRQ
  lines are input lines does not hold.  Oh well, revert and back to the
  drawing board with that.

  Core changes:

   - The big item is of course the completion of the character device
     ABI.  It has now replaced and surpassed the former unmaintainable
     sysfs ABI: we can now hammer (bitbang) individual lines or sets of
     lines and read individual lines or sets of lines from userspace,
     and we can also register to listen to GPIO events from userspace.

     As a tie-in we have two new tools in tools/gpio: gpio-hammer and
     gpio-event-mon that illustrate the proper use of the new ABI.  As
     someone said: the wild west days of GPIO are now over.

   - Continued to remove the pointless ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB
     Kconfig symbols.  I'm patching hexagon, openrisc, powerpc, sh,
     unicore, ia64 and microblaze.  These are either ACKed by their
     maintainers or patched anyways after a grace period and no response
     from maintainers.

     Some archs (ARM) come in from their trees, and others (x86) are
     still not fixed, so I might send a second pull request to root it
     out later in this merge window, or just defer to v4.9.

   - The GPIO tools are moved to the tools build system.

  New drivers:

   - New driver for the MAX77620/MAX20024.

   - New driver for the Intel Merrifield.

   - Enabled PCA953x for the TI PCA9536.

   - Enabled PCA953x for the Intel Edison.

   - Enabled R8A7792 in the RCAR driver.

  Driver improvements:

   - The STMPE and F7188x now supports the .get_direction() callback.

   - The Xilinx driver supports setting multiple lines at once.

   - ACPI support for the Vulcan GPIO controller.

   - The MMIO GPIO driver supports device tree probing.

   - The Acer One 10 is supported through the _DEP ACPI attribute.

  Cleanups:

   - A major cleanup of the OF/DT support code.  It is way easier to
     read and understand now, probably this improves performance too.

   - Drop a few redundant .owner assignments.

   - Remove CLPS711x boardfile support: we are 100% DT"

* tag 'gpio-v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (67 commits)
  MAINTAINERS: Add INTEL MERRIFIELD GPIO entry
  gpio: dwapb: add missing fwnode_handle_put() in dwapb_gpio_get_pdata()
  gpio: merrifield: Protect irq_ack() and gpio_set() by lock
  gpio: merrifield: Introduce GPIO driver to support Merrifield
  gpio: intel-mid: Make it depend to X86_INTEL_MID
  gpio: intel-mid: Sort header block alphabetically
  gpio: intel-mid: Remove potentially harmful code
  gpio: rcar: add R8A7792 support
  gpiolib: remove duplicated include from gpiolib.c
  Revert "gpio: convince line to become input in irq helper"
  gpiolib: of_find_gpio(): Don't discard errors
  gpio: of: Allow overriding the device node
  gpio: free handles in fringe cases
  gpio: tps65218: Add platform_device_id table
  gpio: max77620: get gpio value based on direction
  gpio: lynxpoint: avoid potential warning on error path
  tools/gpio: add install section
  tools/gpio: move to tools buildsystem
  gpio: intel-mid: switch to devm_gpiochip_add_data()
  gpio: 74x164: Use spi_write() helper instead of open coding
  ...
2016-07-26 19:16:01 -07:00
Linus Torvalds 9c1958fc32 media updates for v4.8-rc1
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Merge tag 'media/v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:

 - new framework support for HDMI CEC and remote control support

 - new encoding codec driver for Mediatek SoC

 - new frontend driver: helene tuner

 - added support for NetUp almost universal devices, with supports
   DVB-C/S/S2/T/T2 and ISDB-T

 - the mn88472 frontend driver got promoted from staging

 - a new driver for RCar video input

 - some soc_camera legacy drivers got removed: timb, omap1, mx2, mx3

 - lots of driver cleanups, improvements and fixups

* tag 'media/v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (377 commits)
  [media] cec: always check all_device_types and features
  [media] cec: poll should check if there is room in the tx queue
  [media] vivid: support monitor all mode
  [media] cec: fix test for unconfigured adapter in main message loop
  [media] cec: limit the size of the transmit queue
  [media] cec: zero unused msg part after msg->len
  [media] cec: don't set fh to NULL in CEC_TRANSMIT
  [media] cec: clear all status fields before transmit and always fill in sequence
  [media] cec: CEC_RECEIVE overwrote the timeout field
  [media] cxd2841er: Reading SNR for DVB-C added
  [media] cxd2841er: Reading BER and UCB for DVB-C added
  [media] cxd2841er: fix switch-case for DVB-C
  [media] cxd2841er: fix signal strength scale for ISDB-T
  [media] cxd2841er: adjust the dB scale for DVB-C
  [media] cxd2841er: provide signal strength for DVB-C
  [media] cxd2841er: fix BER report via DVBv5 stats API
  [media] mb86a20s: apply mask to val after checking for read failure
  [media] airspy: fix error logic during device register
  [media] s5p-cec/TODO: add TODO item
  [media] cec/TODO: drop comment about sphinx documentation
  ...
2016-07-26 18:59:59 -07:00
Linus Torvalds 1b3fc0bef8 pstore subsystem updates for v4.8
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Merge tag 'pstore-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull pstore subsystem updates from Kees Cook:
 "This expands the supported compressors, fixes some bugs, and finally
  adds DT bindings"

* tag 'pstore-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  pstore/ram: add Device Tree bindings
  efi-pstore: implement efivars_pstore_exit()
  pstore: drop file opened reference count
  pstore: add lzo/lz4 compression support
  pstore: Cleanup pstore_dump()
  pstore: Enable compression on normal path (again)
  ramoops: Only unregister when registered
2016-07-26 18:48:23 -07:00
Linus Torvalds e663107fa1 ACPI material for v4.8-rc1
- Support for ACPI SSDT overlays allowing Secondary System
    Description Tables (SSDTs) to be loaded at any time from EFI
    variables or via configfs (Octavian Purdila, Mika Westerberg).
 
  - Support for the ACPI LPI (Low-Power Idle) feature introduced in
    ACPI 6.0 and allowing processor idle states to be represented in
    ACPI tables in a hierarchical way (with the help of Processor
    Container objects) and support for ACPI idle states management
    on ARM64, based on LPI (Sudeep Holla).
 
  - General improvements of ACPI support for NUMA and ARM64 support
    for ACPI-based NUMA (Hanjun Guo, David Daney, Robert Richter).
 
  - General improvements of the ACPI table upgrade mechanism and
    ARM64 support for that feature (Aleksey Makarov, Jon Masters).
 
  - Support for the Boot Error Record Table (BERT) in APEI and
    improvements of kernel messages printed by the error injection
    code (Huang Ying, Borislav Petkov).
 
  - New driver for the Intel Broxton WhiskeyCove PMIC operation
    region and support for the REGS operation region on Broxton,
    PMIC code cleanups (Bin Gao, Felipe Balbi, Paul Gortmaker).
 
  - New driver for the power participant device which is part of the
    Dynamic Power and Thermal Framework (DPTF) and DPTF-related code
    reorganization (Srinivas Pandruvada).
 
  - Support for the platform-initiated graceful shutdown feature
    introduced in ACPI 6.1 (Prashanth Prakash).
 
  - ACPI button driver update related to lid input events generated
    automatically on initialization and system resume that have been
    problematic for some time (Lv Zheng).
 
  - ACPI EC driver cleanups (Lv Zheng).
 
  - Documentation of the ACPICA release automation process and the
    in-kernel ACPI AML debugger (Lv Zheng).
 
  - New blacklist entry and two fixes for the ACPI backlight driver
    (Alex Hung, Arvind Yadav, Ralf Gerbig).
 
  - Cleanups of the ACPI pci_slot driver (Joe Perches, Paul Gortmaker).
 
  - ACPI CPPC code changes to make it more robust against possible
    defects in ACPI tables and new symbol definitions for PCC (Hoan
    Tran).
 
  - System reboot code modification to execute the ACPI _PTS (Prepare
    To Sleep) method in addition to _TTS (Ocean He).
 
  - ACPICA-related change to carry out lock ordering checks in ACPICA
    if ACPICA debug is enabled in the kernel (Lv Zheng).
 
  - Assorted minor fixes and cleanups (Andy Shevchenko, Baoquan He,
    Bhaktipriya Shridhar, Paul Gortmaker, Rafael Wysocki).
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Merge tag 'acpi-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI updates from Rafael Wysocki:
 "The new feaures here are the support for ACPI overlays (allowing ACPI
  tables to be loaded at any time from EFI variables or via configfs)
  and the LPI (Low-Power Idle) support.  Also notable is the ACPI-based
  NUMA support for ARM64.

  Apart from that we have two new drivers, for the DPTF (Dynamic Power
  and Thermal Framework) power participant device and for the Intel
  Broxton WhiskeyCove PMIC, some more PMIC-related changes, support for
  the Boot Error Record Table (BERT) in APEI and support for
  platform-initiated graceful shutdown.

  Plus two new pieces of documentation and usual assorted fixes and
  cleanups in quite a few places.

  Specifics:

   - Support for ACPI SSDT overlays allowing Secondary System
     Description Tables (SSDTs) to be loaded at any time from EFI
     variables or via configfs (Octavian Purdila, Mika Westerberg).

   - Support for the ACPI LPI (Low-Power Idle) feature introduced in
     ACPI 6.0 and allowing processor idle states to be represented in
     ACPI tables in a hierarchical way (with the help of Processor
     Container objects) and support for ACPI idle states management on
     ARM64, based on LPI (Sudeep Holla).

   - General improvements of ACPI support for NUMA and ARM64 support for
     ACPI-based NUMA (Hanjun Guo, David Daney, Robert Richter).

   - General improvements of the ACPI table upgrade mechanism and ARM64
     support for that feature (Aleksey Makarov, Jon Masters).

   - Support for the Boot Error Record Table (BERT) in APEI and
     improvements of kernel messages printed by the error injection code
     (Huang Ying, Borislav Petkov).

   - New driver for the Intel Broxton WhiskeyCove PMIC operation region
     and support for the REGS operation region on Broxton, PMIC code
     cleanups (Bin Gao, Felipe Balbi, Paul Gortmaker).

   - New driver for the power participant device which is part of the
     Dynamic Power and Thermal Framework (DPTF) and DPTF-related code
     reorganization (Srinivas Pandruvada).

   - Support for the platform-initiated graceful shutdown feature
     introduced in ACPI 6.1 (Prashanth Prakash).

   - ACPI button driver update related to lid input events generated
     automatically on initialization and system resume that have been
     problematic for some time (Lv Zheng).

   - ACPI EC driver cleanups (Lv Zheng).

   - Documentation of the ACPICA release automation process and the
     in-kernel ACPI AML debugger (Lv Zheng).

   - New blacklist entry and two fixes for the ACPI backlight driver
     (Alex Hung, Arvind Yadav, Ralf Gerbig).

   - Cleanups of the ACPI pci_slot driver (Joe Perches, Paul Gortmaker).

   - ACPI CPPC code changes to make it more robust against possible
     defects in ACPI tables and new symbol definitions for PCC (Hoan
     Tran).

   - System reboot code modification to execute the ACPI _PTS (Prepare
     To Sleep) method in addition to _TTS (Ocean He).

   - ACPICA-related change to carry out lock ordering checks in ACPICA
     if ACPICA debug is enabled in the kernel (Lv Zheng).

   - Assorted minor fixes and cleanups (Andy Shevchenko, Baoquan He,
     Bhaktipriya Shridhar, Paul Gortmaker, Rafael Wysocki)"

* tag 'acpi-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (71 commits)
  ACPI: enable ACPI_PROCESSOR_IDLE on ARM64
  arm64: add support for ACPI Low Power Idle(LPI)
  drivers: firmware: psci: initialise idle states using ACPI LPI
  cpuidle: introduce CPU_PM_CPU_IDLE_ENTER macro for ARM{32, 64}
  arm64: cpuidle: drop __init section marker to arm_cpuidle_init
  ACPI / processor_idle: Add support for Low Power Idle(LPI) states
  ACPI / processor_idle: introduce ACPI_PROCESSOR_CSTATE
  ACPI / DPTF: move int340x_thermal.c to the DPTF folder
  ACPI / DPTF: Add DPTF power participant driver
  ACPI / lpat: make it explicitly non-modular
  ACPI / dock: make dock explicitly non-modular
  ACPI / PCI: make pci_slot explicitly non-modular
  ACPI / PMIC: remove modular references from non-modular code
  ACPICA: Linux: Enable ACPI_MUTEX_DEBUG for Linux kernel
  ACPI: Rename configfs.c to acpi_configfs.c to prevent link error
  ACPI / debugger: Add AML debugger documentation
  ACPI: Add documentation describing ACPICA release automation
  ACPI: add support for loading SSDTs via configfs
  ACPI: add support for configfs
  efi / ACPI: load SSTDs from EFI variables
  ...
2016-07-26 17:56:45 -07:00
Linus Torvalds 6453dbdda3 Power management material for v4.8-rc1
- Rework the cpufreq governor interface to make it more straightforward
    and modify the conservative governor to avoid using transition
    notifications (Rafael Wysocki).
 
  - Rework the handling of frequency tables by the cpufreq core to make
    it more efficient (Viresh Kumar).
 
  - Modify the schedutil governor to reduce the number of wakeups it
    causes to occur in cases when the CPU frequency doesn't need to be
    changed (Steve Muckle, Viresh Kumar).
 
  - Fix some minor issues and clean up code in the cpufreq core and
    governors (Rafael Wysocki, Viresh Kumar).
 
  - Add Intel Broxton support to the intel_pstate driver (Srinivas
    Pandruvada).
 
  - Fix problems related to the config TDP feature and to the validity
    of the MSR_HWP_INTERRUPT register in intel_pstate (Jan Kiszka,
    Srinivas Pandruvada).
 
  - Make intel_pstate update the cpu_frequency tracepoint even if
    the frequency doesn't change to avoid confusing powertop (Rafael
    Wysocki).
 
  - Clean up the usage of __init/__initdata in intel_pstate, mark some
    of its internal variables as __read_mostly and drop an unused
    structure element from it (Jisheng Zhang, Carsten Emde).
 
  - Clean up the usage of some duplicate MSR symbols in intel_pstate
    and turbostat (Srinivas Pandruvada).
 
  - Update/fix the powernv, s3c24xx and mvebu cpufreq drivers (Akshay
    Adiga, Viresh Kumar, Ben Dooks).
 
  - Fix a regression (introduced during the 4.5 cycle) in the
    pcc-cpufreq driver by reverting the problematic commit (Andreas
    Herrmann).
 
  - Add support for Intel Denverton to intel_idle, clean up Broxton
    support in it and make it explicitly non-modular (Jacob Pan,
    Jan Beulich, Paul Gortmaker).
 
  - Add support for Denverton and Ivy Bridge server to the Intel RAPL
    power capping driver and make it more careful about the handing
    of MSRs that may not be present (Jacob Pan, Xiaolong Wang).
 
  - Fix resume from hibernation on x86-64 by making the CPU offline
    during resume avoid using MONITOR/MWAIT in the "play dead" loop
    which may lead to an inadvertent "revival" of a "dead" CPU and
    a page fault leading to a kernel crash from it (Rafael Wysocki).
 
  - Make memory management during resume from hibernation more
    straightforward (Rafael Wysocki).
 
  - Add debug features that should help to detect problems related
    to hibernation and resume from it (Rafael Wysocki, Chen Yu).
 
  - Clean up hibernation core somewhat (Rafael Wysocki).
 
  - Prevent KASAN from instrumenting the hibernation core which leads
    to large numbers of false-positives from it (James Morse).
 
  - Prevent PM (hibernate and suspend) notifiers from being called
    during the cleanup phase if they have not been called during the
    corresponding preparation phase which is possible if one of the
    other notifiers returns an error at that time (Lianwei Wang).
 
  - Improve suspend-related debug printout in the tasks freezer and
    clean up suspend-related console handling (Roger Lu, Borislav
    Petkov).
 
  - Update the AnalyzeSuspend script in the kernel sources to
    version 4.2 (Todd Brandt).
 
  - Modify the generic power domains framework to make it handle
    system suspend/resume better (Ulf Hansson).
 
  - Make the runtime PM framework avoid resuming devices synchronously
    when user space changes the runtime PM settings for them and
    improve its error reporting (Rafael Wysocki, Linus Walleij).
 
  - Fix error paths in devfreq drivers (exynos, exynos-ppmu, exynos-bus)
    and in the core, make some devfreq code explicitly non-modular and
    change some of it into tristate (Bartlomiej Zolnierkiewicz,
    Peter Chen, Paul Gortmaker).
 
  - Add DT support to the generic PM clocks management code and make
    it export some more symbols (Jon Hunter, Paul Gortmaker).
 
  - Make the PCI PM core code slightly more robust against possible
    driver errors (Andy Shevchenko).
 
  - Make it possible to change DESTDIR and PREFIX in turbostat
    (Andy Shevchenko).
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Merge tag 'pm-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael  Wysocki:
 "Again, the majority of changes go into the cpufreq subsystem, but
  there are no big features this time.  The cpufreq changes that stand
  out somewhat are the governor interface rework and improvements
  related to the handling of frequency tables.  Apart from those, there
  are fixes and new device/CPU IDs in drivers, cleanups and an
  improvement of the new schedutil governor.

  Next, there are some changes in the hibernation core, including a fix
  for a nasty problem related to the MONITOR/MWAIT usage by CPU offline
  during resume from hibernation, a few core improvements related to
  memory management during resume, a couple of additional debug features
  and cleanups.

  Finally, we have some fixes and cleanups in the devfreq subsystem,
  generic power domains framework improvements related to system
  suspend/resume, support for some new chips in intel_idle and in the
  power capping RAPL driver, a new version of the AnalyzeSuspend utility
  and some assorted fixes and cleanups.

  Specifics:

   - Rework the cpufreq governor interface to make it more
     straightforward and modify the conservative governor to avoid using
     transition notifications (Rafael Wysocki).

   - Rework the handling of frequency tables by the cpufreq core to make
     it more efficient (Viresh Kumar).

   - Modify the schedutil governor to reduce the number of wakeups it
     causes to occur in cases when the CPU frequency doesn't need to be
     changed (Steve Muckle, Viresh Kumar).

   - Fix some minor issues and clean up code in the cpufreq core and
     governors (Rafael Wysocki, Viresh Kumar).

   - Add Intel Broxton support to the intel_pstate driver (Srinivas
     Pandruvada).

   - Fix problems related to the config TDP feature and to the validity
     of the MSR_HWP_INTERRUPT register in intel_pstate (Jan Kiszka,
     Srinivas Pandruvada).

   - Make intel_pstate update the cpu_frequency tracepoint even if the
     frequency doesn't change to avoid confusing powertop (Rafael
     Wysocki).

   - Clean up the usage of __init/__initdata in intel_pstate, mark some
     of its internal variables as __read_mostly and drop an unused
     structure element from it (Jisheng Zhang, Carsten Emde).

   - Clean up the usage of some duplicate MSR symbols in intel_pstate
     and turbostat (Srinivas Pandruvada).

   - Update/fix the powernv, s3c24xx and mvebu cpufreq drivers (Akshay
     Adiga, Viresh Kumar, Ben Dooks).

   - Fix a regression (introduced during the 4.5 cycle) in the
     pcc-cpufreq driver by reverting the problematic commit (Andreas
     Herrmann).

   - Add support for Intel Denverton to intel_idle, clean up Broxton
     support in it and make it explicitly non-modular (Jacob Pan, Jan
     Beulich, Paul Gortmaker).

   - Add support for Denverton and Ivy Bridge server to the Intel RAPL
     power capping driver and make it more careful about the handing of
     MSRs that may not be present (Jacob Pan, Xiaolong Wang).

   - Fix resume from hibernation on x86-64 by making the CPU offline
     during resume avoid using MONITOR/MWAIT in the "play dead" loop
     which may lead to an inadvertent "revival" of a "dead" CPU and a
     page fault leading to a kernel crash from it (Rafael Wysocki).

   - Make memory management during resume from hibernation more
     straightforward (Rafael Wysocki).

   - Add debug features that should help to detect problems related to
     hibernation and resume from it (Rafael Wysocki, Chen Yu).

   - Clean up hibernation core somewhat (Rafael Wysocki).

   - Prevent KASAN from instrumenting the hibernation core which leads
     to large numbers of false-positives from it (James Morse).

   - Prevent PM (hibernate and suspend) notifiers from being called
     during the cleanup phase if they have not been called during the
     corresponding preparation phase which is possible if one of the
     other notifiers returns an error at that time (Lianwei Wang).

   - Improve suspend-related debug printout in the tasks freezer and
     clean up suspend-related console handling (Roger Lu, Borislav
     Petkov).

   - Update the AnalyzeSuspend script in the kernel sources to version
     4.2 (Todd Brandt).

   - Modify the generic power domains framework to make it handle system
     suspend/resume better (Ulf Hansson).

   - Make the runtime PM framework avoid resuming devices synchronously
     when user space changes the runtime PM settings for them and
     improve its error reporting (Rafael Wysocki, Linus Walleij).

   - Fix error paths in devfreq drivers (exynos, exynos-ppmu,
     exynos-bus) and in the core, make some devfreq code explicitly
     non-modular and change some of it into tristate (Bartlomiej
     Zolnierkiewicz, Peter Chen, Paul Gortmaker).

   - Add DT support to the generic PM clocks management code and make it
     export some more symbols (Jon Hunter, Paul Gortmaker).

   - Make the PCI PM core code slightly more robust against possible
     driver errors (Andy Shevchenko).

   - Make it possible to change DESTDIR and PREFIX in turbostat (Andy
     Shevchenko)"

* tag 'pm-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (89 commits)
  Revert "cpufreq: pcc-cpufreq: update default value of cpuinfo_transition_latency"
  PM / hibernate: Introduce test_resume mode for hibernation
  cpufreq: export cpufreq_driver_resolve_freq()
  cpufreq: Disallow ->resolve_freq() for drivers providing ->target_index()
  PCI / PM: check all fields in pci_set_platform_pm()
  cpufreq: acpi-cpufreq: use cached frequency mapping when possible
  cpufreq: schedutil: map raw required frequency to driver frequency
  cpufreq: add cpufreq_driver_resolve_freq()
  cpufreq: intel_pstate: Check cpuid for MSR_HWP_INTERRUPT
  intel_pstate: Update cpu_frequency tracepoint every time
  cpufreq: intel_pstate: clean remnant struct element
  PM / tools: scripts: AnalyzeSuspend v4.2
  x86 / hibernate: Use hlt_play_dead() when resuming from hibernation
  cpufreq: powernv: Replacing pstate_id with frequency table index
  intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max_pstate()
  PM / hibernate: Image data protection during restoration
  PM / hibernate: Add missing braces in __register_nosave_region()
  PM / hibernate: Clean up comments in snapshot.c
  PM / hibernate: Clean up function headers in snapshot.c
  PM / hibernate: Add missing braces in hibernate_setup()
  ...
2016-07-26 17:29:07 -07:00
Catalin Marinas b9c220b589 arm64: Only select ARM64_MODULE_PLTS if MODULES=y
Selecting CONFIG_RANDOMIZE_BASE=y and CONFIG_MODULES=n fails to build
the module PLTs support:

  CC      arch/arm64/kernel/module-plts.o
/work/Linux/linux-2.6-aarch64/arch/arm64/kernel/module-plts.c: In function ‘module_emit_plt_entry’:
/work/Linux/linux-2.6-aarch64/arch/arm64/kernel/module-plts.c:32:49: error: dereferencing pointer to incomplete type ‘struct module’

This patch selects ARM64_MODULE_PLTS conditionally only if MODULES is
enabled.

Fixes: f80fb3a3d5 ("arm64: add support for kernel ASLR")
Cc: <stable@vger.kernel.org> # 4.6+
Reported-by: Jeff Vander Stoep <jeffv@google.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-27 00:20:32 +01:00
Kirill A. Shutemov dcddffd41d mm: do not pass mm_struct into handle_mm_fault
We always have vma->vm_mm around.

Link: http://lkml.kernel.org/r/1466021202-61880-8-git-send-email-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26 16:19:19 -07:00
Vladimir Davydov 3e79ec7ddc arch: x86: charge page tables to kmemcg
Page tables can bite a relatively big chunk off system memory and their
allocations are easy to trigger from userspace, so they should be
accounted to kmemcg.

This patch marks page table allocations as __GFP_ACCOUNT for x86.  Note
we must not charge allocations of kernel page tables, because they can
be shared among processes from different cgroups so accounting them to a
particular one can pin other cgroups for indefinitely long.  So we clear
__GFP_ACCOUNT flag if a page table is allocated for the kernel.

Link: http://lkml.kernel.org/r/7d5c54f6a2bcbe76f03171689440003d87e6c742.1464079538.git.vdavydov@virtuozzo.com
Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26 16:19:19 -07:00
Aneesh Kumar K.V e77b0852b5 mm/mmu_gather: track page size with mmu gather and force flush if page size change
This allows an arch which needs to do special handing with respect to
different page size when flushing tlb to implement the same in mmu
gather.

Link: http://lkml.kernel.org/r/1465049193-22197-3-git-send-email-aneesh.kumar@linux.vnet.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Hugh Dickins <hughd@google.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: David Rientjes <rientjes@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26 16:19:19 -07:00
Aneesh Kumar K.V e9d55e1570 mm: change the interface for __tlb_remove_page()
This updates the generic and arch specific implementation to return true
if we need to do a tlb flush.  That means if a __tlb_remove_page
indicate a flush is needed, the page we try to remove need to be tracked
and added again after the flush.  We need to track it because we have
already update the pte to none and we can't just loop back.

This change is done to enable us to do a tlb_flush when we try to flush
a range that consists of different page sizes.  For architectures like
ppc64, we can do a range based tlb flush and we need to track page size
for that.  When we try to remove a huge page, we will force a tlb flush
and starts a new mmu gather.

[aneesh.kumar@linux.vnet.ibm.com: mm-change-the-interface-for-__tlb_remove_page-v3]
  Link: http://lkml.kernel.org/r/1465049193-22197-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1464860389-29019-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Hugh Dickins <hughd@google.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: David Rientjes <rientjes@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26 16:19:19 -07:00
Aneesh Kumar K.V 9af3f56ba1 powerpc/mm: check for irq disabled() only if DEBUG_VM is enabled
We don't need to check this always.  The idea here is to capture the
wrong usage of find_linux_pte_or_hugepte and we can do that by
occasionally running with DEBUG_VM enabled.

Link: http://lkml.kernel.org/r/1464692688-6612-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26 16:19:19 -07:00
Sudip Mukherjee a44ce52363 m32r: add __ucmpdi2 to fix build failure
We are having build failure with m32r and the error message being:

  ERROR: "__ucmpdi2" [lib/842/842_decompress.ko] undefined!
  ERROR: "__ucmpdi2" [fs/btrfs/btrfs.ko] undefined!
  ERROR: "__ucmpdi2" [drivers/scsi/sd_mod.ko] undefined!
  ERROR: "__ucmpdi2" [drivers/media/i2c/adv7842.ko] undefined!
  ERROR: "__ucmpdi2" [drivers/md/bcache/bcache.ko] undefined!
  ERROR: "__ucmpdi2" [drivers/iio/imu/inv_mpu6050/inv-mpu6050.ko] undefined!

__ucmpdi2 is introduced to m32r architecture taking example from other
architectures like h8300, microblaze, mips.

Link: http://lkml.kernel.org/r/1465509213-4280-1-git-send-email-sudipm.mukherjee@gmail.com
Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26 16:19:19 -07:00
Kees Cook c965b105bf kbuild: abort build on bad stack protector flag
Before, the stack protector flag was sanity checked before .config had
been reprocessed.  This meant the build couldn't be aborted early, and
only a warning could be emitted followed later by the compiler blowing
up with an unknown flag.  This has caused a lot of confusion over time,
so this splits the flag selection from sanity checking and performs the
sanity checking after the make has been restarted from a reprocessed
.config, so builds can be aborted as early as possible now.

Additionally moves the x86-specific sanity check to the same location,
since it suffered from the same warn-then-wait-for-compiler-failure
problem.

Link: http://lkml.kernel.org/r/20160712223043.GA11664@www.outflux.net
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Michal Marek <mmarek@suse.com>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26 16:19:19 -07:00
Michal Hocko 397b080bb7 arm: get rid of superfluous __GFP_REPEAT
__GFP_REPEAT has a rather weak semantic but since it has been introduced
around 2.6.12 it has been ignored for low order allocations.

PGALLOC_GFP uses __GFP_REPEAT but none of the allocation which uses this
flag is for more than order-2.  This means that this flag has never been
actually useful here because it has always been used only for
PAGE_ALLOC_COSTLY requests.

Link: http://lkml.kernel.org/r/1464599699-30131-5-git-send-email-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26 16:19:19 -07:00
Linus Torvalds 3fc9d69093 Merge branch 'for-4.8/drivers' of git://git.kernel.dk/linux-block
Pull block driver updates from Jens Axboe:
 "This branch also contains core changes.  I've come to the conclusion
  that from 4.9 and forward, I'll be doing just a single branch.  We
  often have dependencies between core and drivers, and it's hard to
  always split them up appropriately without pulling core into drivers
  when that happens.

  That said, this contains:

   - separate secure erase type for the core block layer, from
     Christoph.

   - set of discard fixes, from Christoph.

   - bio shrinking fixes from Christoph, as a followup up to the
     op/flags change in the core branch.

   - map and append request fixes from Christoph.

   - NVMeF (NVMe over Fabrics) code from Christoph.  This is pretty
     exciting!

   - nvme-loop fixes from Arnd.

   - removal of ->driverfs_dev from Dan, after providing a
     device_add_disk() helper.

   - bcache fixes from Bhaktipriya and Yijing.

   - cdrom subchannel read fix from Vchannaiah.

   - set of lightnvm updates from Wenwei, Matias, Johannes, and Javier.

   - set of drbd updates and fixes from Fabian, Lars, and Philipp.

   - mg_disk error path fix from Bart.

   - user notification for failed device add for loop, from Minfei.

   - NVMe in general:
        + NVMe delay quirk from Guilherme.
        + SR-IOV support and command retry limits from Keith.
        + fix for memory-less NUMA node from Masayoshi.
        + use UINT_MAX for discard sectors, from Minfei.
        + cancel IO fixes from Ming.
        + don't allocate unused major, from Neil.
        + error code fixup from Dan.
        + use constants for PSDT/FUSE from James.
        + variable init fix from Jay.
        + fabrics fixes from Ming, Sagi, and Wei.
        + various fixes"

* 'for-4.8/drivers' of git://git.kernel.dk/linux-block: (115 commits)
  nvme/pci: Provide SR-IOV support
  nvme: initialize variable before logical OR'ing it
  block: unexport various bio mapping helpers
  scsi/osd: open code blk_make_request
  target: stop using blk_make_request
  block: simplify and export blk_rq_append_bio
  block: ensure bios return from blk_get_request are properly initialized
  virtio_blk: use blk_rq_map_kern
  memstick: don't allow REQ_TYPE_BLOCK_PC requests
  block: shrink bio size again
  block: simplify and cleanup bvec pool handling
  block: get rid of bio_rw and READA
  block: don't ignore -EOPNOTSUPP blkdev_issue_write_same
  block: introduce BLKDEV_DISCARD_ZERO to fix zeroout
  NVMe: don't allocate unused nvme_major
  nvme: avoid crashes when node 0 is memoryless node.
  nvme: Limit command retries
  loop: Make user notify for adding loop device failed
  nvme-loop: fix nvme-loop Kconfig dependencies
  nvmet: fix return value check in nvmet_subsys_alloc()
  ...
2016-07-26 15:37:51 -07:00
Kees Cook a519167e75 gcc-plugins: disable under COMPILE_TEST
Since adding the gcc plugin development headers is required for the
gcc plugin support, we should ease into this new kernel build dependency
more slowly. For now, disable the gcc plugins under COMPILE_TEST so that
all*config builds will skip it.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-27 00:08:54 +02:00
Linus Torvalds d05d7f4079 Merge branch 'for-4.8/core' of git://git.kernel.dk/linux-block
Pull core block updates from Jens Axboe:

   - the big change is the cleanup from Mike Christie, cleaning up our
     uses of command types and modified flags.  This is what will throw
     some merge conflicts

   - regression fix for the above for btrfs, from Vincent

   - following up to the above, better packing of struct request from
     Christoph

   - a 2038 fix for blktrace from Arnd

   - a few trivial/spelling fixes from Bart Van Assche

   - a front merge check fix from Damien, which could cause issues on
     SMR drives

   - Atari partition fix from Gabriel

   - convert cfq to highres timers, since jiffies isn't granular enough
     for some devices these days.  From Jan and Jeff

   - CFQ priority boost fix idle classes, from me

   - cleanup series from Ming, improving our bio/bvec iteration

   - a direct issue fix for blk-mq from Omar

   - fix for plug merging not involving the IO scheduler, like we do for
     other types of merges.  From Tahsin

   - expose DAX type internally and through sysfs.  From Toshi and Yigal

* 'for-4.8/core' of git://git.kernel.dk/linux-block: (76 commits)
  block: Fix front merge check
  block: do not merge requests without consulting with io scheduler
  block: Fix spelling in a source code comment
  block: expose QUEUE_FLAG_DAX in sysfs
  block: add QUEUE_FLAG_DAX for devices to advertise their DAX support
  Btrfs: fix comparison in __btrfs_map_block()
  block: atari: Return early for unsupported sector size
  Doc: block: Fix a typo in queue-sysfs.txt
  cfq-iosched: Charge at least 1 jiffie instead of 1 ns
  cfq-iosched: Fix regression in bonnie++ rewrite performance
  cfq-iosched: Convert slice_resid from u64 to s64
  block: Convert fifo_time from ulong to u64
  blktrace: avoid using timespec
  block/blk-cgroup.c: Declare local symbols static
  block/bio-integrity.c: Add #include "blk.h"
  block/partition-generic.c: Remove a set-but-not-used variable
  block: bio: kill BIO_MAX_SIZE
  cfq-iosched: temporarily boost queue priority for idle classes
  block: drbd: avoid to use BIO_MAX_SIZE
  block: bio: remove BIO_MAX_SECTORS
  ...
2016-07-26 15:03:07 -07:00
Kees Cook 228d96c603 kbuild: Abort build on bad stack protector flag
Before, the stack protector flag was sanity checked before .config had
been reprocessed. This meant the build couldn't be aborted early, and
only a warning could be emitted followed later by the compiler blowing
up with an unknown flag. This has caused a lot of confusion over time,
so this splits the flag selection from sanity checking and performs the
sanity checking after the make has been restarted from a reprocessed
.config, so builds can be aborted as early as possible now.

Additionally moves the x86-specific sanity check to the same location,
since it suffered from the same warn-then-wait-for-compiler-failure
problem.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-26 23:50:59 +02:00
Linus Torvalds 75a442efb1 Merge branch 'for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata updates from Tejun Heo:
 "libata saw quite a bit of activities in this cycle:

   - SMR drive support still being worked on

   - bug fixes and improvements to misc SCSI command emulation

   - some low level driver updates"

* 'for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: (39 commits)
  libata-scsi: better style in ata_msense_*()
  AHCI: Clear GHC.IS to prevent unexpectly asserting INTx
  ata: sata_dwc_460ex: remove redundant dev_err call
  ata: define ATA_PROT_* in terms of ATA_PROT_FLAG_*
  libata: remove ATA_PROT_FLAG_DATA
  libata: remove ata_is_nodata
  ata: make lba_{28,48}_ok() use ATA_MAX_SECTORS{,_LBA48}
  libata-scsi: minor cleanup for ata_scsi_zbc_out_xlat
  libata-scsi: Fix ZBC management out command translation
  libata-scsi: Fix translation of REPORT ZONES command
  ata: Handle ATA NCQ NO-DATA commands correctly
  libata-eh: decode all taskfile protocols
  ata: fixup ATA_PROT_NODATA
  libsas: use ata_is_ncq() and ata_has_dma() accessors
  libata: use ata_is_ncq() accessors
  libata: return boolean values from ata_is_*
  libata-scsi: avoid repeated calculation of number of TRIM ranges
  libata-scsi: reject WRITE SAME (16) with n_block that exceeds limit
  libata-scsi: rename ata_msense_ctl_mode() to ata_msense_control()
  libata-scsi: fix D_SENSE bit relection in control mode page
  ...
2016-07-26 14:39:40 -07:00
Thomas Petazzoni 76f6386b25 arm64: dts: marvell: Add Aardvark PCIe support for Armada 3700
Add the SoC-level description of the PCIe controller found on the Marvell
Armada 3700 and enable this PCIe controller on the development board for
this SoC.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-26 16:20:35 -05:00
Linus Torvalds bbce2ad2d7 Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
 "Here is the crypto update for 4.8:

  API:
   - first part of skcipher low-level conversions
   - add KPP (Key-agreement Protocol Primitives) interface.

  Algorithms:
   - fix IPsec/cryptd reordering issues that affects aesni
   - RSA no longer does explicit leading zero removal
   - add SHA3
   - add DH
   - add ECDH
   - improve DRBG performance by not doing CTR by hand

  Drivers:
   - add x86 AVX2 multibuffer SHA256/512
   - add POWER8 optimised crc32c
   - add xts support to vmx
   - add DH support to qat
   - add RSA support to caam
   - add Layerscape support to caam
   - add SEC1 AEAD support to talitos
   - improve performance by chaining requests in marvell/cesa
   - add support for Araneus Alea I USB RNG
   - add support for Broadcom BCM5301 RNG
   - add support for Amlogic Meson RNG
   - add support Broadcom NSP SoC RNG"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (180 commits)
  crypto: vmx - Fix aes_p8_xts_decrypt build failure
  crypto: vmx - Ignore generated files
  crypto: vmx - Adding support for XTS
  crypto: vmx - Adding asm subroutines for XTS
  crypto: skcipher - add comment for skcipher_alg->base
  crypto: testmgr - Print akcipher algorithm name
  crypto: marvell - Fix wrong flag used for GFP in mv_cesa_dma_add_iv_op
  crypto: nx - off by one bug in nx_of_update_msc()
  crypto: rsa-pkcs1pad - fix rsa-pkcs1pad request struct
  crypto: scatterwalk - Inline start/map/done
  crypto: scatterwalk - Remove unnecessary BUG in scatterwalk_start
  crypto: scatterwalk - Remove unnecessary advance in scatterwalk_pagedone
  crypto: scatterwalk - Fix test in scatterwalk_done
  crypto: api - Optimise away crypto_yield when hard preemption is on
  crypto: scatterwalk - add no-copy support to copychunks
  crypto: scatterwalk - Remove scatterwalk_bytes_sglen
  crypto: omap - Stop using crypto scatterwalk_bytes_sglen
  crypto: skcipher - Remove top-level givcipher interface
  crypto: user - Remove crypto_lookup_skcipher call
  crypto: cts - Convert to skcipher
  ...
2016-07-26 13:40:17 -07:00
Rob Herring e973f4ec13 xtensa: Partially Revert "xtensa: Remove unnecessary of_platform_populate with default match table"
This partially reverts commit 69d99e6c0d keeping only the main
purpose of the original commit which is the removal of
of_platform_populate() call. The moving of of_clk_init() caused changes
in the initialization order breaking booting.

Fixes: 69d99e6c0d ("xtensa: Remove unnecessary of_platform_populate with default match table")
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Tested-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2016-07-26 15:04:01 -05:00
Linus Torvalds 015cd867e5 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Martin Schwidefsky:
 "There are a couple of new things for s390 with this merge request:

   - a new scheduling domain "drawer" is added to reflect the unusual
     topology found on z13 machines.  Performance tests showed up to 8
     percent gain with the additional domain.

   - the new crc-32 checksum crypto module uses the vector-galois-field
     multiply and sum SIMD instruction to speed up crc-32 and crc-32c.

   - proper __ro_after_init support, this requires RO_AFTER_INIT_DATA in
     the generic vmlinux.lds linker script definitions.

   - kcov instrumentation support.  A prerequisite for that is the
     inline assembly basic block cleanup, which is the reason for the
     net/iucv/iucv.c change.

   - support for 2GB pages is added to the hugetlbfs backend.

  Then there are two removals:

   - the oprofile hardware sampling support is dead code and is removed.
     The oprofile user space uses the perf interface nowadays.

   - the ETR clock synchronization is removed, this has been superseeded
     be the STP clock synchronization.  And it always has been
     "interesting" code..

  And the usual bug fixes and cleanups"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (82 commits)
  s390/pci: Delete an unnecessary check before the function call "pci_dev_put"
  s390/smp: clean up a condition
  s390/cio/chp : Remove deprecated create_singlethread_workqueue
  s390/chsc: improve channel path descriptor determination
  s390/chsc: sanitize fmt check for chp_desc determination
  s390/cio: make fmt1 channel path descriptor optional
  s390/chsc: fix ioctl CHSC_INFO_CU command
  s390/cio/device_ops: fix kernel doc
  s390/cio: allow to reset channel measurement block
  s390/console: Make preferred console handling more consistent
  s390/mm: fix gmap tlb flush issues
  s390/mm: add support for 2GB hugepages
  s390: have unique symbol for __switch_to address
  s390/cpuinfo: show maximum thread id
  s390/ptrace: clarify bits in the per_struct
  s390: stack address vs thread_info
  s390: remove pointless load within __switch_to
  s390: enable kcov support
  s390/cpumf: use basic block for ecctr inline assembly
  s390/hypfs: use basic block for diag inline assembly
  ...
2016-07-26 12:22:51 -07:00
Linus Torvalds 85802a49a8 This merge introduces three patches that are later reverted,
- Switching of MSR_TSC_AUX in SVM was thought to cause a host
    misbehavior, but it was later cleared of those doubts and the patch
    moved code to a hot path, so we reverted it.  That patch also needed
    a fix for 32 bit builds and both were reverted in one go.
 
  - Al Viro noticed that a fix for a leak in an error path was not valid
    with the given API and provided a better fix, so the original patch
    was reverted.
 
 Then there are two VMX fixes that move code around because VMCS was not
 accessed between vcpu_load() and vcpu_put(), a simple ARM VHE fix, and
 two one-liners for PML and MTRR.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM leftovers from Radim Krčmář:
 "This is a combination of two pull requests for 4.7-rc8 that were not
  merged due to looking hairy.  I have changed the tag message to focus
  on circumstances of contained reverts as they were likely the reason
  behind rejection.

  This merge introduces three patches that are later reverted,

   - Switching of MSR_TSC_AUX in SVM was thought to cause a host
     misbehavior, but it was later cleared of those doubts and the patch
     moved code to a hot path, so we reverted it.  That patch also
     needed a fix for 32 bit builds and both were reverted in one go.

   - Al Viro noticed that a fix for a leak in an error path was not
     valid with the given API and provided a better fix, so the original
     patch was reverted.

  Then there are two VMX fixes that move code around because VMCS was
  not accessed between vcpu_load() and vcpu_put(), a simple ARM VHE fix,
  and two one-liners for PML and MTRR"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  arm64: KVM: VHE: Context switch MDSCR_EL1
  KVM: VMX: handle PML full VMEXIT that occurs during event delivery
  Revert "KVM: SVM: fix trashing of MSR_TSC_AUX"
  KVM: SVM: do not set MSR_TSC_AUX on 32-bit builds
  KVM: don't use anon_inode_getfd() before possible failures
  Revert "KVM: release anon file in failure path of vm creation"
  KVM: release anon file in failure path of vm creation
  KVM: nVMX: Fix memory corruption when using VMCS shadowing
  kvm: vmx: ensure VMCS is current while enabling PML
  KVM: SVM: fix trashing of MSR_TSC_AUX
  KVM: MTRR: fix kvm_mtrr_check_gfn_range_consistency page fault
2016-07-26 11:50:42 -07:00
Borislav Petkov efaad554b4 x86/microcode/intel: Fix initrd loading with CONFIG_RANDOMIZE_MEMORY=y
CONFIG_RANDOMIZE_MEMORY=y randomizes the physical memmap and thus the
address where the initrd is located. Therefore, we need to add the
offset KASLR put us to in order to find the initrd again on the AP path.

In the future, we will get rid of the initrd address caching and query
the address on both the BSP and AP paths but that would need more work.

Thanks to Nicolai Stange for the good bisection and debugging work.

Reported-and-tested-by: Nicolai Stange <nicstange@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160726095138.3470-1-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-26 19:32:57 +02:00
Linus Torvalds 37e13a1ebe Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
 "This tree contains tooling fixes plus some additions:

   - fixes to the vdso2c build environment that Stephen Rothwell is
     using for the linux-next build (Arnaldo Carvalho de Melo)

   - AVX-512 instruction mappings (Adrian Hunter)

   - misc fixes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Revert "perf tools: event.h needs asm/perf_regs.h"
  x86: Make the vdso2c compiler use the host architecture headers
  tools build: Fix objtool build with ARCH=x86_64
  objtool: Always use host headers
  objtool: Use tools/scripts/Makefile.arch to get ARCH and HOSTARCH
  tools build: Add HOSTARCH Makefile variable
  perf tests kmod-path: Fix build on ubuntu:16.04-x-armhf
  perf tools: Add AVX-512 instructions to the new instructions test
  perf tools: Add AVX-512 support to the instruction decoder used by Intel PT
  x86/insn: Add AVX-512 support to the instruction decoder
  x86/insn: perf tools: Fix vcvtph2ps instruction decoding
2016-07-26 10:26:29 -07:00
Guenter Roeck d02014b2b7 xtensa: Fix build error due to missing include file
Commit 69d99e6c0d ("xtensa: Remove unnecessary of_platform_populate
with default match table") dropped various include files from
arch/xtensa/kernel/setup.c. This results in the following build error.

arch/xtensa/kernel/setup.c: In function ‘xtensa_dt_io_area’:
arch/xtensa/kernel/setup.c:213:2: error:
	implicit declaration of function ‘of_read_ulong’

Fixes: 69d99e6c0d ("xtensa: Remove unnecessary of_platform_populate with default match table")
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2016-07-26 11:51:24 -05:00
Juergen Gross d34c30cc1f xen: add static initialization of steal_clock op to xen_time_ops
pv_time_ops might be overwritten with xen_time_ops after the
steal_clock operation has been initialized already. To prevent calling
a now uninitialized function pointer add the steal_clock static
initialization to xen_time_ops.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-07-26 14:07:06 +01:00
Dave Airlie 5e580523d9 Linux 4.7
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Backmerge tag 'v4.7' into drm-next

Linux 4.7

As requested by Daniel Vetter as the conflicts were getting messy.
2016-07-26 17:26:29 +10:00
Iyappan Subramanian 8e694cd276 dtb: xgene: Add MDIO node
Added mdio node for mdio driver.  Also added phy-handle
reference to the ethernet nodes.

Removed unused clock node from storm sgenet1.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Tested-by: Fushen Chen <fchen@apm.com>
Tested-by: Toan Le <toanle@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-25 21:51:44 -07:00
Linus Torvalds e65805251f Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq updates from Thomas Gleixner:
 "The irq department delivers:

   - new core infrastructure to allow better management of multi-queue
     devices (interrupt spreading, node aware descriptor allocation ...)

   - a new interrupt flow handler to support the new fangled Intel VMD
     devices.

   - yet another new interrupt controller driver.

   - a series of fixes which addresses sparse warnings, missing
     includes, missing static declarations etc from Ben Dooks.

   - a fix for the error handling in the hierarchical domain allocation
     code.

   - the usual pile of small updates to core and driver code"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (46 commits)
  genirq: Fix missing irq allocation affinity hint
  irqdomain: Fix irq_domain_alloc_irqs_recursive() error handling
  irq/Documentation: Correct result of echnoing 5 to smp_affinity
  MAINTAINERS: Remove Jiang Liu from irq domains
  genirq/msi: Fix broken debug output
  genirq: Add a helper to spread an affinity mask for MSI/MSI-X vectors
  genirq/msi: Make use of affinity aware allocations
  genirq: Use affinity hint in irqdesc allocation
  genirq: Add affinity hint to irq allocation
  genirq: Introduce IRQD_AFFINITY_MANAGED flag
  genirq/msi: Remove unused MSI_FLAG_IDENTITY_MAP
  irqchip/s3c24xx: Fixup IO accessors for big endian
  irqchip/exynos-combiner: Fix usage of __raw IO
  irqdomain: Fix disposal of mappings for interrupt hierarchies
  irqchip/aspeed-vic: Add irq controller for Aspeed
  doc/devicetree: Add Aspeed VIC bindings
  x86/PCI/VMD: Use untracked irq handler
  genirq: Add untracked irq handler
  irqchip/mips-gic: Populate irq_domain names
  irqchip/gicv3-its: Implement two-level(indirect) device table support
  ...
2016-07-25 21:35:03 -07:00
Anton Blanchard dd57023747 powerpc: Improve comment explaining why we modify VRSAVE
The comment explaining why we modify VRSAVE is misleading, glibc
does rely on the behaviour. Update the comment.

Signed-off-by: Anton Blanchard <anton@samba.org>
Reviewed-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-26 14:16:19 +10:00
Michael Ellerman 1a1cee843c powerpc/mm: Drop unused externs for hpte_init_beat[_v3]()
We removed the BEAT support in 2015 in commit bf4981a006 ("powerpc:
Remove the celleb support"). These externs are unused since then.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-26 14:16:18 +10:00
Michael Ellerman 6364e84e85 powerpc/mm: Rename hpte_init_lpar() and move the fallback to a header
hpte_init_lpar() is part of the pseries platform, so name it as such.

Move the fallback implementation for when PSERIES=n into the header,
dropping the weak implementation. The panic() is now handled by the
calling code.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-26 14:16:18 +10:00
Michael Ellerman 7353644fa9 powerpc/mm: Fix build break when PPC_NATIVE=n
The recent commit to rework the hash MMU setup broke the build when
CONFIG_PPC_NATIVE=n. Fix it by adding an IS_ENABLED() check before
calling hpte_init_native().

Removing the else clause opens the possibility that we don't set any
ops, which would probably lead to a strange crash later. So add a check
that we correctly initialised at least one member of the struct.

Fixes: 166dd7d3fb ("powerpc/64: Move MMU backend selection out of platform code")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-26 14:16:08 +10:00
Linus Torvalds 55392c4c06 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
 "This update provides the following changes:

   - The rework of the timer wheel which addresses the shortcomings of
     the current wheel (cascading, slow search for next expiring timer,
     etc).  That's the first major change of the wheel in almost 20
     years since Finn implemted it.

   - A large overhaul of the clocksource drivers init functions to
     consolidate the Device Tree initialization

   - Some more Y2038 updates

   - A capability fix for timerfd

   - Yet another clock chip driver

   - The usual pile of updates, comment improvements all over the place"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (130 commits)
  tick/nohz: Optimize nohz idle enter
  clockevents: Make clockevents_subsys static
  clocksource/drivers/time-armada-370-xp: Fix return value check
  timers: Implement optimization for same expiry time in mod_timer()
  timers: Split out index calculation
  timers: Only wake softirq if necessary
  timers: Forward the wheel clock whenever possible
  timers/nohz: Remove pointless tick_nohz_kick_tick() function
  timers: Optimize collect_expired_timers() for NOHZ
  timers: Move __run_timers() function
  timers: Remove set_timer_slack() leftovers
  timers: Switch to a non-cascading wheel
  timers: Reduce the CPU index space to 256k
  timers: Give a few structs and members proper names
  hlist: Add hlist_is_singular_node() helper
  signals: Use hrtimer for sigtimedwait()
  timers: Remove the deprecated mod_timer_pinned() API
  timers, net/ipv4/inet: Initialize connection request timers as pinned
  timers, drivers/tty/mips_ejtag: Initialize the poll timer as pinned
  timers, drivers/tty/metag_da: Initialize the poll timer as pinned
  ...
2016-07-25 20:43:12 -07:00
Linus Torvalds c410614c90 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fix from Ingo Molnar:
 "Leftover fix from the v4.7 cycle: adds a reboot quirk"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/reboot: Add Dell Optiplex 7450 AIO reboot quirk
2016-07-25 20:06:38 -07:00
Linus Torvalds 5f22004ba9 Merge branch 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 timer updates from Ingo Molnar:
 "The main change in this tree is the reworking, fixing and extension of
  the TSC frequency enumeration code (by Len Brown)"

* 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/tsc: Remove the unused check_tsc_disabled()
  x86/tsc: Enumerate BXT tsc_khz via CPUID
  x86/tsc: Enumerate SKL cpu_khz and tsc_khz via CPUID
  x86/tsc_msr: Remove irqoff around MSR-based TSC enumeration
  x86/tsc_msr: Add Airmont reference clock values
  x86/tsc_msr: Correct Silvermont reference clock values
  x86/tsc_msr: Update comments, expand definitions
  x86/tsc_msr: Remove debugging messages
  x86/tsc_msr: Identify Intel-specific code
  Revert "x86/tsc: Add missing Cherrytrail frequency to the table"
2016-07-25 19:41:35 -07:00
Linus Torvalds 8e466955d6 Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Intel-SoC enhancements (Andy Shevchenko)

   - Intel CPU symbolic model definition rework (Dave Hansen)

   - ... other misc changes"

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits)
  x86/sfi: Enable enumeration of SD devices
  x86/pci: Use MRFLD abbreviation for Merrifield
  x86/platform/intel-mid: Make vertical indentation consistent
  x86/platform/intel-mid: Mark regulators explicitly defined
  x86/platform/intel-mid: Rename mrfl.c to mrfld.c
  x86/platform/intel-mid: Enable spidev on Intel Edison boards
  x86/platform/intel-mid: Extend PWRMU to support Penwell
  x86/pci, x86/platform/intel_mid_pci: Remove duplicate power off code
  x86/platform/intel-mid: Add pinctrl for Intel Merrifield
  x86/platform/intel-mid: Enable GPIO expanders on Edison
  x86/platform/intel-mid: Add Power Management Unit driver
  x86/platform/atom/punit: Enable support for Merrifield
  x86/platform/intel_mid_pci: Rework IRQ0 workaround
  x86, thermal: Clean up and fix CPU model detection for intel_soc_dts_thermal
  x86, mmc: Use Intel family name macros for mmc driver
  x86/intel_telemetry: Use Intel family name macros for telemetry driver
  x86/acpi/lss: Use Intel family name macros for the acpi_lpss driver
  x86/cpufreq: Use Intel family name macros for the intel_pstate cpufreq driver
  x86/platform: Use new Intel model number macros
  x86/intel_idle: Use Intel family macros for intel_idle
  ...
2016-07-25 19:15:35 -07:00
Linus Torvalds 2d724ffddd Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fpu updates from Ingo Molnar:
 "The main x86 FPU changes in this cycle were:

   - a large series of cleanups, fixes and enhancements to re-enable the
     XSAVES instruction on Intel CPUs - which is the most advanced
     instruction to do FPU context switches (Yu-cheng Yu, Fenghua Yu)

   - Add FPU tracepoints for the FPU state machine (Dave Hansen)"

* 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fpu: Do not BUG_ON() in early FPU code
  x86/fpu/xstate: Re-enable XSAVES
  x86/fpu/xstate: Fix fpstate_init() for XRSTORS
  x86/fpu/xstate: Return NULL for disabled xstate component address
  x86/fpu/xstate: Fix __fpu_restore_sig() for XSAVES
  x86/fpu/xstate: Fix xstate_offsets, xstate_sizes for non-extended xstates
  x86/fpu/xstate: Fix XSTATE component offset print out
  x86/fpu/xstate: Fix PTRACE frames for XSAVES
  x86/fpu/xstate: Fix supervisor xstate component offset
  x86/fpu/xstate: Align xstate components according to CPUID
  x86/fpu/xstate: Copy xstate registers directly to the signal frame when compacted format is in use
  x86/fpu/xstate: Keep init_fpstate.xsave.header.xfeatures as zero for init optimization
  x86/fpu/xstate: Rename 'xstate_size' to 'fpu_kernel_xstate_size', to distinguish it from 'fpu_user_xstate_size'
  x86/fpu/xstate: Define and use 'fpu_user_xstate_size'
  x86/fpu: Add tracepoints to dump FPU state at key points
2016-07-25 18:48:27 -07:00
Linus Torvalds 36e635cb21 Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 stackdump update from Ingo Molnar:
 "A number of stackdump enhancements"

* 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/dumpstack: Add show_stack_regs() and use it
  printk: Make the printk*once() variants return a value
  x86/dumpstack: Honor supplied @regs arg
2016-07-25 18:18:04 -07:00
Linus Torvalds c265cc5c3c Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cleanups from Ingo Molnar:
 "Three small cleanups"

* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  lguest: Read offset of device_cap later
  lguest: Read length of device_cap later
  x86: Do away with ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB
2016-07-25 18:06:00 -07:00
Linus Torvalds 80f09cf5c1 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 build system fix and a cleanup"

* 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  kbuild: Remove stale asm-generic wrappers
  kbuild, x86: Track generated headers with generated-y
2016-07-25 18:00:18 -07:00
Linus Torvalds 77cd3d0c43 Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 boot updates from Ingo Molnar:
 "The main changes:

   - add initial commits to randomize kernel memory section virtual
     addresses, enabled via a new kernel option: RANDOMIZE_MEMORY
     (Thomas Garnier, Kees Cook, Baoquan He, Yinghai Lu)

   - enhance KASLR (RANDOMIZE_BASE) physical memory randomization (Kees
     Cook)

   - EBDA/BIOS region boot quirk cleanups (Andy Lutomirski, Ingo Molnar)

   - misc cleanups/fixes"

* 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Simplify EBDA-vs-BIOS reservation logic
  x86/boot: Clarify what x86_legacy_features.reserve_bios_regions does
  x86/boot: Reorganize and clean up the BIOS area reservation code
  x86/mm: Do not reference phys addr beyond kernel
  x86/mm: Add memory hotplug support for KASLR memory randomization
  x86/mm: Enable KASLR for vmalloc memory regions
  x86/mm: Enable KASLR for physical mapping memory regions
  x86/mm: Implement ASLR for kernel memory regions
  x86/mm: Separate variable for trampoline PGD
  x86/mm: Add PUD VA support for physical mapping
  x86/mm: Update physical mapping variable names
  x86/mm: Refactor KASLR entropy functions
  x86/KASLR: Fix boot crash with certain memory configurations
  x86/boot/64: Add forgotten end of function marker
  x86/KASLR: Allow randomization below the load address
  x86/KASLR: Extend kernel image physical address randomization to addresses larger than 4G
  x86/KASLR: Randomize virtual address separately
  x86/KASLR: Clarify identity map interface
  x86/boot: Refuse to build with data relocations
  x86/KASLR, x86/power: Remove x86 hibernation restrictions
2016-07-25 17:32:28 -07:00
Linus Torvalds 0f657262d5 Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 mm updates from Ingo Molnar:
 "Various x86 low level modifications:

   - preparatory work to support virtually mapped kernel stacks (Andy
     Lutomirski)

   - support for 64-bit __get_user() on 32-bit kernels (Benjamin
     LaHaise)

   - (involved) workaround for Knights Landing CPU erratum (Dave Hansen)

   - MPX enhancements (Dave Hansen)

   - mremap() extension to allow remapping of the special VDSO vma, for
     purposes of user level context save/restore (Dmitry Safonov)

   - hweight and entry code cleanups (Borislav Petkov)

   - bitops code generation optimizations and cleanups with modern GCC
     (H. Peter Anvin)

   - syscall entry code optimizations (Paolo Bonzini)"

* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (43 commits)
  x86/mm/cpa: Add missing comment in populate_pdg()
  x86/mm/cpa: Fix populate_pgd(): Stop trying to deallocate failed PUDs
  x86/syscalls: Add compat_sys_preadv64v2/compat_sys_pwritev64v2
  x86/smp: Remove unnecessary initialization of thread_info::cpu
  x86/smp: Remove stack_smp_processor_id()
  x86/uaccess: Move thread_info::addr_limit to thread_struct
  x86/dumpstack: Rename thread_struct::sig_on_uaccess_error to sig_on_uaccess_err
  x86/uaccess: Move thread_info::uaccess_err and thread_info::sig_on_uaccess_err to thread_struct
  x86/dumpstack: When OOPSing, rewind the stack before do_exit()
  x86/mm/64: In vmalloc_fault(), use CR3 instead of current->active_mm
  x86/dumpstack/64: Handle faults when printing the "Stack: " part of an OOPS
  x86/dumpstack: Try harder to get a call trace on stack overflow
  x86/mm: Remove kernel_unmap_pages_in_pgd() and efi_cleanup_page_tables()
  x86/mm/cpa: In populate_pgd(), don't set the PGD entry until it's populated
  x86/mm/hotplug: Don't remove PGD entries in remove_pagetable()
  x86/mm: Use pte_none() to test for empty PTE
  x86/mm: Disallow running with 32-bit PTEs to work around erratum
  x86/mm: Ignore A/D bits in pte/pmd/pud_none()
  x86/mm: Move swap offset/type up in PTE to work around erratum
  x86/entry: Inline enter_from_user_mode()
  ...
2016-07-25 15:34:18 -07:00
Linus Torvalds 425dbc6db3 Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/apic updates from Ingo Molnar:
 "Misc cleanups and a small fix"

* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/apic: Remove the unused struct apic::apic_id_mask field
  x86/apic: Fix misspelled APIC
  x86/ioapic: Simplify ioapic_setup_resources()
2016-07-25 15:09:08 -07:00
Linus Torvalds cca08cd66c Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:

 - introduce and use task_rcu_dereference()/try_get_task_struct() to fix
   and generalize task_struct handling (Oleg Nesterov)

 - do various per entity load tracking (PELT) fixes and optimizations
   (Peter Zijlstra)

 - cputime virt-steal time accounting enhancements/fixes (Wanpeng Li)

 - introduce consolidated cputime output file cpuacct.usage_all and
   related refactorings (Zhao Lei)

 - ... plus misc fixes and enhancements

* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/core: Panic on scheduling while atomic bugs if kernel.panic_on_warn is set
  sched/cpuacct: Introduce cpuacct.usage_all to show all CPU stats together
  sched/cpuacct: Use loop to consolidate code in cpuacct_stats_show()
  sched/cpuacct: Merge cpuacct_usage_index and cpuacct_stat_index enums
  sched/fair: Rework throttle_count sync
  sched/core: Fix sched_getaffinity() return value kerneldoc comment
  sched/fair: Reorder cgroup creation code
  sched/fair: Apply more PELT fixes
  sched/fair: Fix PELT integrity for new tasks
  sched/cgroup: Fix cpu_cgroup_fork() handling
  sched/fair: Fix PELT integrity for new groups
  sched/fair: Fix and optimize the fork() path
  sched/cputime: Add steal time support to full dynticks CPU time accounting
  sched/cputime: Fix prev steal time accouting during CPU hotplug
  KVM: Fix steal clock warp during guest CPU hotplug
  sched/debug: Always show 'nr_migrations'
  sched/fair: Use task_rcu_dereference()
  sched/api: Introduce task_rcu_dereference() and try_get_task_struct()
  sched/idle: Optimize the generic idle loop
  sched/fair: Fix the wrong throttled clock time for cfs_rq_clock_task()
2016-07-25 13:59:34 -07:00
Kees Cook 74e630a758 Linux 4.7
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Merge tag 'v4.7' into for-linus/pstore

Linux 4.7
2016-07-25 13:50:36 -07:00
Linus Torvalds 7e4dc77b28 Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
 "With over 300 commits it's been a busy cycle - with most of the work
  concentrated on the tooling side (as it should).

  The main kernel side enhancements were:

   - Add per event callchain limit: Recently we introduced a sysctl to
     tune the max-stack for all events for which callchains were
     requested:

       $ sysctl kernel.perf_event_max_stack
       kernel.perf_event_max_stack = 127

     Now this patch introduces a way to configure this per event, i.e.
     this becomes possible:

       $ perf record -e sched:*/max-stack=2/ -e block:*/max-stack=10/ -a

     allowing finer tuning of how much buffer space callchains use.

     This uses an u16 from the reserved space at the end, leaving
     another u16 for future use.

     There has been interest in even finer tuning, namely to control the
     max stack for kernel and userspace callchains separately.  Further
     discussion is needed, we may for instance use the remaining u16 for
     that and when it is present, assume that the sample_max_stack
     introduced in this patch applies for the kernel, and the u16 left
     is used for limiting the userspace callchain (Arnaldo Carvalho de
     Melo)

   - Optimize AUX event (hardware assisted side-band event) delivery
     (Kan Liang)

   - Rework Intel family name macro usage (this is partially x86 arch
     work) (Dave Hansen)

   - Refine and fix Intel LBR support (David Carrillo-Cisneros)

   - Add support for Intel 'TopDown' events (Andi Kleen)

   - Intel uncore PMU driver fixes and enhancements (Kan Liang)

   - ... other misc changes.

  Here's an incomplete list of the tooling enhancements (but there's
  much more, see the shortlog and the git log for details):

   - Support cross unwinding, i.e.  collecting '--call-graph dwarf'
     perf.data files in one machine and then doing analysis in another
     machine of a different hardware architecture.  This enables, for
     instance, to do:

       $ perf record -a --call-graph dwarf

     on a x86-32 or aarch64 system and then do 'perf report' on it on a
     x86_64 workstation (He Kuang)

   - Allow reading from a backward ring buffer (one setup via
     sys_perf_event_open() with perf_event_attr.write_backward = 1)
     (Wang Nan)

   - Finish merging initial SDT (Statically Defined Traces) support, see
     cset comments for details about how it all works (Masami Hiramatsu)

   - Support attaching eBPF programs to tracepoints (Wang Nan)

   - Add demangling of symbols in programs written in the Rust language
     (David Tolnay)

   - Add support for tracepoints in the python binding, including an
     example, that sets up and parses sched:sched_switch events,
     tools/perf/python/tracepoint.py (Jiri Olsa)

   - Introduce --stdio-color to set up the color output mode selection
     in 'annotate' and 'report', allowing emit color escape sequences
     when redirecting the output of these tools (Arnaldo Carvalho de
     Melo)

   - Add 'callindent' option to 'perf script -F', to indent the Intel PT
     call stack, making this output more ftrace-like (Adrian Hunter,
     Andi Kleen)

   - Allow dumping the object files generated by llvm when processing
     eBPF scriptlet events (Wang Nan)

   - Add stackcollapse.py script to help generating flame graphs (Paolo
     Bonzini)

   - Add --ldlat option to 'perf mem' to specify load latency for loads
     event (e.g. cpu/mem-loads/ ) (Jiri Olsa)

   - Tooling support for Intel TopDown counters, recently added to the
     kernel (Andi Kleen)"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (303 commits)
  perf tests: Add is_printable_array test
  perf tools: Make is_printable_array global
  perf script python: Fix string vs byte array resolving
  perf probe: Warn unmatched function filter correctly
  perf cpu_map: Add more helpers
  perf stat: Balance opening and reading events
  tools: Copy linux/{hash,poison}.h and check for drift
  perf tools: Remove include/linux/list.h from perf's MANIFEST
  tools: Copy the bitops files accessed from the kernel and check for drift
  Remove: kernel unistd*h files from perf's MANIFEST, not used
  perf tools: Remove tools/perf/util/include/linux/const.h
  perf tools: Remove tools/perf/util/include/asm/byteorder.h
  perf tools: Add missing linux/compiler.h include to perf-sys.h
  perf jit: Remove some no-op error handling
  perf jit: Add missing curly braces
  objtool: Initialize variable to silence old compiler
  objtool: Add -I$(srctree)/tools/arch/$(ARCH)/include/uapi
  perf record: Add --tail-synthesize option
  perf session: Don't warn about out of order event if write_backward is used
  perf tools: Enable overwrite settings
  ...
2016-07-25 13:20:41 -07:00
Linus Torvalds 89e7eb098a Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS updates from Ingo Molnar:
 "The biggest change in this cycle was an enhancement by Yazen Ghannam
  to reduce the number of MCE error injection related IPIs.

  The rest are smaller fixes"

* 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce: Fix mce_rdmsrl() warning message
  x86/RAS/AMD: Reduce the number of IPIs when prepping error injection
  x86/mce/AMD: Increase size of the bank_map type
  x86/mce: Do not use bank 1 for APEI generated error logs
2016-07-25 13:13:19 -07:00
Linus Torvalds c86ad14d30 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
 "The locking tree was busier in this cycle than the usual pattern - a
  couple of major projects happened to coincide.

  The main changes are:

   - implement the atomic_fetch_{add,sub,and,or,xor}() API natively
     across all SMP architectures (Peter Zijlstra)

   - add atomic_fetch_{inc/dec}() as well, using the generic primitives
     (Davidlohr Bueso)

   - optimize various aspects of rwsems (Jason Low, Davidlohr Bueso,
     Waiman Long)

   - optimize smp_cond_load_acquire() on arm64 and implement LSE based
     atomic{,64}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}()
     on arm64 (Will Deacon)

   - introduce smp_acquire__after_ctrl_dep() and fix various barrier
     mis-uses and bugs (Peter Zijlstra)

   - after discovering ancient spin_unlock_wait() barrier bugs in its
     implementation and usage, strengthen its semantics and update/fix
     usage sites (Peter Zijlstra)

   - optimize mutex_trylock() fastpath (Peter Zijlstra)

   - ... misc fixes and cleanups"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (67 commits)
  locking/atomic: Introduce inc/dec variants for the atomic_fetch_$op() API
  locking/barriers, arch/arm64: Implement LDXR+WFE based smp_cond_load_acquire()
  locking/static_keys: Fix non static symbol Sparse warning
  locking/qspinlock: Use __this_cpu_dec() instead of full-blown this_cpu_dec()
  locking/atomic, arch/tile: Fix tilepro build
  locking/atomic, arch/m68k: Remove comment
  locking/atomic, arch/arc: Fix build
  locking/Documentation: Clarify limited control-dependency scope
  locking/atomic, arch/rwsem: Employ atomic_long_fetch_add()
  locking/atomic, arch/qrwlock: Employ atomic_fetch_add_acquire()
  locking/atomic, arch/mips: Convert to _relaxed atomics
  locking/atomic, arch/alpha: Convert to _relaxed atomics
  locking/atomic: Remove the deprecated atomic_{set,clear}_mask() functions
  locking/atomic: Remove linux/atomic.h:atomic_fetch_or()
  locking/atomic: Implement atomic{,64,_long}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}()
  locking/atomic: Fix atomic64_relaxed() bits
  locking/atomic, arch/xtensa: Implement atomic_fetch_{add,sub,and,or,xor}()
  locking/atomic, arch/x86: Implement atomic{,64}_fetch_{add,sub,and,or,xor}()
  locking/atomic, arch/tile: Implement atomic{,64}_fetch_{add,sub,and,or,xor}()
  locking/atomic, arch/sparc: Implement atomic{,64}_fetch_{add,sub,and,or,xor}()
  ...
2016-07-25 12:41:29 -07:00
Linus Torvalds a2303849a6 Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI updates from Ingo Molnar:
 "The biggest change in this cycle were SGI/UV related changes that
  clean up and fix UV boot quirks and problems.

  There's also various smaller cleanups and refinements"

* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi: Reorganize the GUID table to make it easier to read
  x86/efi: Remove the unused efi_get_time() function
  x86/efi: Update efi_thunk() to use the the arch_efi_call_virt*() macros
  x86/uv: Update uv_bios_call() to use efi_call_virt_pointer()
  efi: Convert efi_call_virt() to efi_call_virt_pointer()
  x86/efi: Remove unused variable 'efi'
  efi: Document #define FOO_PROTOCOL_GUID layout
  efibc: Report more information in the error messages
2016-07-25 12:30:01 -07:00
Sebastian Andrzej Siewior fbb0e4da96 ia64: salinfo: use a waitqueue instead a sema down/up combo
The only purpose of down_try_lock() followed by up() seems to be to wake
up a possible reader. This patch replaces it with a wake-queue. There is
no locking around cpumask_empty() and the test is re-done in case there
was no hit.
With wait_event_interruptible_lock_irq(,&data_saved_lock) we would probably
be able to get rid of the `retry` label. However we still can return CPU
X which is valid now but later (after the lock dropped) the event may
have been removed because the CPU went offline.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2016-07-25 09:55:32 -07:00
Ard Biesheuvel 1378dc3d4b arm64: mm: run pgtable_page_ctor() on non-swapper translation table pages
The kernel page table creation routines are accessible to other subsystems
(e.g., EFI) via the create_pgd_mapping() entry point, which allows mappings
to be created that are not covered by init_mm.

Since generic code such as apply_to_page_range() may expect translation
table pages that are not associated with init_mm to be covered by fully
constructed struct pages, add a call to pgtable_page_ctor() in the alloc
function used by create_pgd_mapping. Since it is no longer used by
create_mapping_late(), also update the name of this function to better
reflect its purpose.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laura Abbott <labbott@redhat.com>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-25 17:43:36 +01:00
Ard Biesheuvel 258a1605c7 arm64: mm: make create_mapping_late() non-allocating
The only purpose served by create_mapping_late() is to remap the already
mapped .text and .rodata kernel segments with read-only permissions. Since
we no longer allow block mappings to be split or merged,
create_mapping_late() should not pass an allocation function pointer into
__create_pgd_mapping(). So pass NULL instead.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laura Abbott <labbott@redhat.com>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-25 17:42:53 +01:00
James Hogan cdf8b46330 tile: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO
AT_VECTOR_SIZE_ARCH should be defined with the maximum number of
NEW_AUX_ENT entries that ARCH_DLINFO can contain, but it wasn't defined
for tile at all even though ARCH_DLINFO will contain one NEW_AUX_ENT for
the VDSO address.

This shouldn't be a problem as AT_VECTOR_SIZE_BASE includes space for
AT_BASE_PLATFORM which tile doesn't use, but lets define it now and add
the comment above ARCH_DLINFO as found in several other architectures to
remind future modifiers of ARCH_DLINFO to keep AT_VECTOR_SIZE_ARCH up to
date.

Fixes: 4a556f4f56 ("tile: implement gettimeofday() via vDSO")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com>
2016-07-25 12:15:06 -04:00
Stephen Rothwell d51306f1a3 x86: Make the vdso2c compiler use the host architecture headers
To be clear: this is a ppc64le hosted, x86_64 target cross build.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160723150845.3af8e452@canb.auug.org.au
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-07-25 10:02:21 -03:00
Guenter Roeck 20ff3ada47 MIPS: ath79: Add missing include file
Commit ddd0ce87bf ("mips: Remove unnecessary of_platform_populate with
default match table") dropped the include of linux/clk-provider.h from
arch/mips/ath79/setup.c. This results in the following build error.

arch/mips/ath79/setup.c: In function 'ath79_of_plat_time_init':
arch/mips/ath79/setup.c:232:2: error:
	implicit declaration of function 'of_clk_init'

Fixes: ddd0ce87bf ("mips: Remove unnecessary of_platform_populate with default match table")
Cc: Rob Herring <robh@kernel.org>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Rob Herring <robh@kernel.org>
2016-07-25 07:49:13 -05:00
Vitaly Kuznetsov ee42d665d3 xen/pvhvm: run xen_vcpu_setup() for the boot CPU
Historically we didn't call VCPUOP_register_vcpu_info for CPU0 for
PVHVM guests (while we had it for PV and ARM guests). This is usually
fine as we can use vcpu info in the shared_info page but when we try
booting on a vCPU with Xen's vCPU id > 31 (e.g. when we try to kdump
after crashing on this CPU) we're not able to boot.

Switch to always doing VCPUOP_register_vcpu_info for the boot CPU.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-07-25 13:34:23 +01:00
Vitaly Kuznetsov e15a862193 x86/xen: use xen_vcpu_id mapping when pointing vcpu_info to shared_info
shared_info page has space for 32 vcpu info slots for first 32 vCPUs
but these are the first 32 vCPUs from Xen's perspective and we should
map them accordingly with the newly introduced xen_vcpu_id mapping.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-07-25 13:33:40 +01:00
Vitaly Kuznetsov ad5475f9fa x86/xen: use xen_vcpu_id mapping for HYPERVISOR_vcpu_op
HYPERVISOR_vcpu_op() passes Linux's idea of vCPU id as a parameter
while Xen's idea is expected. In some cases these ideas diverge so we
need to do remapping.

Convert all callers of HYPERVISOR_vcpu_op() to use xen_vcpu_nr().

Leave xen_fill_possible_map() and xen_filter_cpu_maps() intact as
they're only being called by PV guests before perpu areas are
initialized. While the issue could be solved by switching to
early_percpu for xen_vcpu_id I think it's not worth it: PV guests will
probably never get to the point where their idea of vCPU id diverges
from Xen's.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-07-25 13:32:34 +01:00
Vitaly Kuznetsov 88e957d6e4 xen: introduce xen_vcpu_id mapping
It may happen that Xen's and Linux's ideas of vCPU id diverge. In
particular, when we crash on a secondary vCPU we may want to do kdump
and unlike plain kexec where we do migrate_to_reboot_cpu() we try
booting on the vCPU which crashed. This doesn't work very well for
PVHVM guests as we have a number of hypercalls where we pass vCPU id
as a parameter. These hypercalls either fail or do something
unexpected.

To solve the issue introduce percpu xen_vcpu_id mapping. ARM and PV
guests get direct mapping for now. Boot CPU for PVHVM guest gets its
id from CPUID. With secondary CPUs it is a bit more
trickier. Currently, we initialize IPI vectors before these CPUs boot
so we can't use CPUID. Use ACPI ids from MADT instead.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-07-25 13:31:16 +01:00
Vitaly Kuznetsov 3e9e57fad3 x86/acpi: store ACPI ids from MADT for future usage
Currently we don't save ACPI ids (unlike LAPIC ids which go to
x86_cpu_to_apicid) from MADT and we may need this information later.
Particularly, ACPI ids is the only existent way for a PVHVM Xen guest
to figure out Xen's idea of its vCPUs ids before these CPUs boot and
in some cases these ids diverge from Linux's cpu ids.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-07-25 13:30:53 +01:00
Vitaly Kuznetsov de2f5537b3 x86/xen: update cpuid.h from Xen-4.7
Update cpuid.h header from xen hypervisor tree to get
XEN_HVM_CPUID_VCPU_ID_PRESENT definition.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-07-25 13:30:45 +01:00
Rafael J. Wysocki bc841e260c Merge branch 'pm-cpu'
* pm-cpu:
  x86: remove duplicate turbo ratio limit MSRs
  tools/power turbostat: Replace MSR_NHM_TURBO_RATIO_LIMIT
  cpufreq: intel_pstate: Replace MSR_NHM_TURBO_RATIO_LIMIT
2016-07-25 13:46:30 +02:00
Rafael J. Wysocki 9def970ead Merge branch 'pm-cpufreq'
* pm-cpufreq: (41 commits)
  Revert "cpufreq: pcc-cpufreq: update default value of cpuinfo_transition_latency"
  cpufreq: export cpufreq_driver_resolve_freq()
  cpufreq: Disallow ->resolve_freq() for drivers providing ->target_index()
  cpufreq: acpi-cpufreq: use cached frequency mapping when possible
  cpufreq: schedutil: map raw required frequency to driver frequency
  cpufreq: add cpufreq_driver_resolve_freq()
  cpufreq: intel_pstate: Check cpuid for MSR_HWP_INTERRUPT
  intel_pstate: Update cpu_frequency tracepoint every time
  cpufreq: intel_pstate: clean remnant struct element
  cpufreq: powernv: Replacing pstate_id with frequency table index
  intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max_pstate()
  cpufreq: Reuse new freq-table helpers
  cpufreq: Handle sorted frequency tables more efficiently
  cpufreq: Drop redundant check from cpufreq_update_current_freq()
  intel_pstate: Declare pid_params/pstate_funcs/hwp_active __read_mostly
  intel_pstate: add __init/__initdata marker to some functions/variables
  intel_pstate: Fix incorrect placement of __initdata
  cpufreq: mvebu: fix integer to pointer cast
  cpufreq: intel_pstate: Broxton support
  cpufreq: conservative: Do not use transition notifications
  ...
2016-07-25 13:46:08 +02:00
Rafael J. Wysocki 9fedbb3b6b Merge branch 'x86/cpu' from tip 2016-07-25 13:45:39 +02:00
Rafael J. Wysocki 7f234a4d8a Merge branches 'pm-sleep' and 'pm-tools'
* pm-sleep:
  PM / hibernate: Introduce test_resume mode for hibernation
  x86 / hibernate: Use hlt_play_dead() when resuming from hibernation
  PM / hibernate: Image data protection during restoration
  PM / hibernate: Add missing braces in __register_nosave_region()
  PM / hibernate: Clean up comments in snapshot.c
  PM / hibernate: Clean up function headers in snapshot.c
  PM / hibernate: Add missing braces in hibernate_setup()
  PM / hibernate: Recycle safe pages after image restoration
  PM / hibernate: Simplify mark_unsafe_pages()
  PM / hibernate: Do not free preallocated safe pages during image restore
  PM / suspend: show workqueue state in suspend flow
  PM / sleep: make PM notifiers called symmetrically
  PM / sleep: Make pm_prepare_console() return void
  PM / Hibernate: Don't let kasan instrument snapshot.c

* pm-tools:
  PM / tools: scripts: AnalyzeSuspend v4.2
  tools/turbostat: allow user to alter DESTDIR and PREFIX
2016-07-25 13:44:32 +02:00
Rafael J. Wysocki 6149dffcb5 Merge branches 'acpi-processor', 'acpi-cppc', 'acpi-apei' and 'acpi-sleep'
* acpi-processor:
  ACPI: enable ACPI_PROCESSOR_IDLE on ARM64
  arm64: add support for ACPI Low Power Idle(LPI)
  drivers: firmware: psci: initialise idle states using ACPI LPI
  cpuidle: introduce CPU_PM_CPU_IDLE_ENTER macro for ARM{32, 64}
  arm64: cpuidle: drop __init section marker to arm_cpuidle_init
  ACPI / processor_idle: Add support for Low Power Idle(LPI) states
  ACPI / processor_idle: introduce ACPI_PROCESSOR_CSTATE

* acpi-cppc:
  mailbox: pcc: Add PCC request and free channel declarations
  ACPI / CPPC: Prevent cpc_desc_ptr points to the invalid data
  ACPI: CPPC: Return error if _CPC is invalid on a CPU

* acpi-apei:
  ACPI / APEI: Add Boot Error Record Table (BERT) support
  ACPI / einj: Make error paths more talkative
  ACPI / einj: Convert EINJ_PFX to proper pr_fmt

* acpi-sleep:
  ACPI: Execute _PTS before system reboot
2016-07-25 13:42:25 +02:00
Rafael J. Wysocki d5f017b796 Merge branch 'acpi-tables'
* acpi-tables:
  ACPI: Rename configfs.c to acpi_configfs.c to prevent link error
  ACPI: add support for loading SSDTs via configfs
  ACPI: add support for configfs
  efi / ACPI: load SSTDs from EFI variables
  spi / ACPI: add support for ACPI reconfigure notifications
  i2c / ACPI: add support for ACPI reconfigure notifications
  ACPI: add support for ACPI reconfiguration notifiers
  ACPI / scan: fix enumeration (visited) flags for bus rescans
  ACPI / documentation: add SSDT overlays documentation
  ACPI: ARM64: support for ACPI_TABLE_UPGRADE
  ACPI / tables: introduce ARCH_HAS_ACPI_TABLE_UPGRADE
  ACPI / tables: move arch-specific symbol to asm/acpi.h
  ACPI / tables: table upgrade: refactor function definitions
  ACPI / tables: table upgrade: use cacheable map for tables

Conflicts:
	arch/arm64/include/asm/acpi.h
2016-07-25 13:41:01 +02:00
Rafael J. Wysocki d85f4eb699 Merge branch 'acpi-numa'
* acpi-numa:
  ACPI / NUMA: Enable ACPI based NUMA on ARM64
  arm64, ACPI, NUMA: NUMA support based on SRAT and SLIT
  ACPI / processor: Add acpi_map_madt_entry()
  ACPI / NUMA: Improve SRAT error detection and add messages
  ACPI / NUMA: Move acpi_numa_memory_affinity_init() to drivers/acpi/numa.c
  ACPI / NUMA: remove unneeded acpi_numa=1
  ACPI / NUMA: move bad_srat() and srat_disabled() to drivers/acpi/numa.c
  x86 / ACPI / NUMA: cleanup acpi_numa_processor_affinity_init()
  arm64, NUMA: Cleanup NUMA disabled messages
  arm64, NUMA: rework numa_add_memblk()
  ACPI / NUMA: move acpi_numa_slit_init() to drivers/acpi/numa.c
  ACPI / NUMA: Move acpi_numa_arch_fixup() to ia64 only
  ACPI / NUMA: remove duplicate NULL check
  ACPI / NUMA: Replace ACPI_DEBUG_PRINT() with pr_debug()
  ACPI / NUMA: Use pr_fmt() instead of printk
2016-07-25 13:40:39 +02:00
Greg Ungerer f987e5a13c m68k: use same start_thread() on MMU and no-MMU
The MMU and no-MMU versions of start_thread() are now identical, so use
the same common code for both.

Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
2016-07-25 14:40:40 +10:00
Greg Ungerer 120c4d95b2 m68k: fix file path comment
Remove the wrong full path name of this file.

Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
2016-07-25 14:40:35 +10:00
Greg Ungerer 89e6ffd9f0 m68k: fix bFLT executable running on MMU enabled systems
Even after recent changes to support running flat format executables on
MMU enabled systems (by nicolas.pitre@linaro.org) they still failed to
run on m68k/ColdFire MMU enabled systems. On trying to run a flat format
binary the application would immediately crash with a SIGSEGV.

Code to setup the D5 register with the base of the application data
region was only in the non-MMU code path, so it was not being set for
the MMU enabled case. Flat binaries on m68k/ColdFire use this to support
GOT/PIC flat built application code.

Fix this so that D5 is always setup when loading/running a bFLT executable
on m68k systems.

Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
2016-07-25 14:40:28 +10:00
Linus Torvalds b7545b79a1 USB update for 4.8-rc1
Here's the big USB driver update for 4.8-rc1.  Lots of the normal stuff
 in here, musb, gadget, xhci, and other updates and fixes.  All of the
 details are in the shortlog.
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB updates from Greg KH:
 "Here's the big USB driver update for 4.8-rc1.  Lots of the normal
  stuff in here, musb, gadget, xhci, and other updates and fixes.  All
  of the details are in the shortlog.

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

* tag 'usb-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (169 commits)
  cdc-acm: beautify probe()
  cdc-wdm: use the common CDC parser
  cdc-acm: cleanup error handling
  cdc-acm: use the common parser
  usbnet: move the CDC parser into USB core
  usb: musb: sunxi: Simplify dr_mode handling
  usb: musb: sunxi: make unexported symbols static
  usb: musb: cppi41: add dma channel tracepoints
  usb: musb: cppi41: move struct cppi41_dma_channel to header
  usb: musb: cleanup cppi_dma header
  usb: musb: gadget: add usb-request tracepoints
  usb: musb: host: add urb tracepoints
  usb: musb: add tracepoints to dump interrupt events
  usb: musb: add tracepoints for register access
  usb: musb: dsps: use musb register read/write wrappers instead
  usb: musb: switch dev_dbg to tracepoints
  usb: musb: add tracepoints support for debugging
  usb: quirks: Add no-lpm quirk for Elan
  phy: rcar-gen3-usb2: fix mutex_lock calling in interrupt
  phy: rockhip-usb: use devm_add_action_or_reset()
  ...
2016-07-24 17:22:18 -07:00
Linus Torvalds 721413aff2 TTY/Serial driver update for 4.8-rc1
Here is the big tty and serial driver update for 4.8-rc1.
 
 Lots of good cleanups from Jiri on a number of vt and other tty related
 things, and the normal driver updates.  Full details are in the
 shortlog.
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver updates from Greg KH:
 "Here is the big tty and serial driver update for 4.8-rc1.

  Lots of good cleanups from Jiri on a number of vt and other tty
  related things, and the normal driver updates.  Full details are in
  the shortlog.

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

* tag 'tty-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (90 commits)
  tty/serial: atmel: enforce tasklet init and termination sequences
  serial: sh-sci: Stop transfers in sci_shutdown()
  serial: 8250_ingenic: drop #if conditional surrounding earlycon code
  serial: 8250_mtk: drop !defined(MODULE) conditional
  serial: 8250_uniphier: drop !defined(MODULE) conditional
  earlycon: mark earlycon code as __used iif the caller is built-in
  tty/serial/8250: use mctrl_gpio helpers
  serial: mctrl_gpio: enable API usage only for initialized mctrl_gpios struct
  serial: mctrl_gpio: add modem control read routine
  tty/serial/8250: make UART_MCR register access consistent
  serial: 8250_mid: Read RX buffer on RX DMA timeout for DNV
  serial: 8250_dma: Export serial8250_rx_dma_flush()
  dmaengine: hsu: Export hsu_dma_get_status()
  tty: serial: 8250: add CON_CONSDEV to flags
  tty: serial: samsung: add byte-order aware bit functions
  tty: serial: samsung: fixup accessors for endian
  serial: sirf: make fifo functions static
  serial: mps2-uart: make driver explicitly non-modular
  serial: mvebu-uart: free the IRQ in ->shutdown()
  serial/bcm63xx_uart: use correct alias naming
  ...
2016-07-24 17:14:37 -07:00
Jan Glauber 22cc1b6b35 spi: octeon: Move include file from arch/mips to drivers/spi
Move the register definitions to the drivers directory because they
are only used there.

Signed-off-by: Jan Glauber <jglauber@cavium.com>
Tested-by: Steven J. Hill <steven.hill@cavium.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-07-24 21:54:29 +01:00
Dan Williams 0606263f24 Merge branch 'for-4.8/libnvdimm' into libnvdimm-for-next 2016-07-24 08:05:44 -07:00
James Hogan 2f8f8c04e8 MIPS: tlbex: Avoid duplicated single_insn_swpd
The expression "uasm_in_compat_space_p(swpd) && !uasm_rel_lo(swpd)" is
used twice in build_get_pgd_vmalloc64(), one of which is assigned to the
local variable single_insn_swpd. Update the other use to just use
single_insn_swpd instead to remove the duplication.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13779/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 13:16:00 +02:00
James Hogan f7d9afea6c MIPS: uasm: Handle low values in uasm_in_compat_space_p()
uasm_in_compat_space_p() determines whether the given value is in the
32-bit compatibility part of the 64-bit address space, i.e. is in 32-bit
sign-extended form, however it only handles the top half of the value
space (corresponding to the kernel compatibility segments in the upper
half of the address space). Since values < 2^31 (corresponding to the
low 2GiB of the address space) can also be handled using 32-bit
instructions (e.g. a LUI and ADDIU) rather than convoluted 64-bit
immediate generation, rewrite it with a cast to check whether the
address matches its 32-bit sign extended form.

This allows UASM_i_LA to be used to generate arbitrary 32-bit immediates
more efficiently on 64-bit CPUs, i.e. more like the li (load immediate)
pseudo-instruction.

For example this code to load the immediate (ST0_EXL | KSU_USER |
ST0_BEV | ST0_KX) into k0 with UASM_i_LA():

 lui        k0,0x0
 dsll       k0,k0,0x10
 daddiu     k0,k0,64
 dsll       k0,k0,0x10
 daddiu     k0,k0,146

Changes to this more efficient version:

 lui        k0,0x40
 addiu      k0,k0,146

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13778/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 13:15:28 +02:00
Sergey Ryazanov af1d8666c5 MIPS: Add default configuration for ath25
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/13700/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:45:59 +02:00
James Hogan e9cbf6299e MIPS: Fix MSA asm warnings in control reg accessors
Building an MSA capable kernel with a toolchain that supports MSA
produces warnings such as this:

  CC      arch/mips/kernel/cpu-probe.o
{standard input}: Assembler messages:
{standard input}:4786: Warning: the `msa' extension requires 64-bit FPRs

This is due to ".set msa" without ".set fp=64" in the inline assembly of
control register accessors, since MSA requires the 64-bit FPU registers
(FR=1). Add the missing fp=64 in these functions to silence the
warnings.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13554/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:45:00 +02:00
Zubair Lutfullah Kakakhel 645c7827e6 MIPS: Pistachio: Remove plat_setup_iocoherency
The Pistachio SoC does not have an IOCU.  Hence, DMA is non-coherent.

Remove the function checking for iocoherency and select
CONFIG_DMA_NONCOHERENT in Kconfig

This code is probably accidentally inherited from Malta.

Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Reviewed-by: James Hartley <james.hartley@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13433/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:41:22 +02:00
Hauke Mehrtens 7bf0d5e8e6 MIPS: Lantiq: Register IRQ handler for virtual IRQ number
We used the hardware IRQ number to register the IRQ handler and not the
virtual one. This probably caused some problems because the hardware
IRQ numbers are only unique for each IRQ controller and not in the
system. The virtual IRQ number is managed by Linux and unique in the
system. This was probably the reason there was a gab of 8 IRQ numbers added
before the numbers used for the lantiq IRQ controller. With the current
setup the hardware and the virtual IRQ numbers are the same.

Reported-by: Thomas Langer <thomas.langer@intel.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: John Crispin <john@phrozen.org>
Cc: thomas.langer@intel.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13539/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:39:59 +02:00
Linus Walleij 666dc36764 MIPS: Delete use of ARCH_WANT_OPTIONAL_GPIOLIB
The Loongson1 added a new instance of ARCH_WANT_OPTIONAL_GPIOLIB
which is no longer required to have GPIOLIB available in
Kconfig. Delete it.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13543/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:38:18 +02:00
John Crispin f97e5e8ef8 MIPS: Lantiq: Use the real EXIN count
We runtime load the available external interrupts into an array and store
the number inside exin_avail. Some of the code however uses MAX_EIU for
looping over the array which may partially be 0. This is a cosmetic fix as
the existing code works as is. It is just nicer to only loop over the array
elements that were actually populated during probe.

Signed-off-by: John Crispin <john@phrozen.org>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/13602/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:31:58 +02:00
John Crispin fe46e5032e MIPS: Lantiq: Fix eiu interrupt loading code
Using of_irq_count to load the irq index from the devicetree is incorrect.
This will cause the kernel to map them regardless, even if they dont
actually get used. Change the code to use of_property_count_u32_elems()
instead which is the correct API to use in this case.

Signed-off-by: John Crispin <john@phrozen.org>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/13601/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:31:44 +02:00
John Crispin f0bbe4dc5c MIPS: Lantiq: Fix eiu interrupt loading code
Using of_irq_count to load the irq index from the devicetree is incorrect.
This will cause the kernel to map them regardless, even if they dont
actually get used. Change the code to use of_property_count_u32_elems()
instead which is the correct API to use in this case.

Signed-off-by: John Crispin <john@phrozen.org>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/13601/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:30:28 +02:00
Matt Redfearn 7840d6188b MIPS: Move CPU Hotplug config option into submenu
The KConfig option HOTPLUG_CPU should appear in the "Kernel Type"
submenu. Relocate it to where SMP support is configured.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13751/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:22:20 +02:00
Matt Redfearn 0d2808f338 MIPS: smp-cps: Add support for CPU hotplug of MIPSr6 processors
Introduce support for hotplug of Virtual Processors in MIPSr6 systems.
The method is simpler than the VPE parallel from the now-deprecated MT
ASE, it can now simply write the VP_STOP register with the mask of VPs
to halt, and use the VP_RUNNING register to determine when the VP has
halted.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Reviewed-by: Paul Burton <paul.burton@imgtec.com>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13752/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:19:57 +02:00
Matt Redfearn 9736c6152e MIPS: smp-cps: Allow booting of CPU other than VP0 within a core
The boot_core function was hardcoded to always start VP0 when starting
a core via the CPC. When hotplugging a CPU this may not be the desired
behaviour.

Make boot_core receive the VP ID to start running on the core, such that
alternate VPs can be started via CPU hotplug.
Also ensure that all other VPs within the core are stopped before
bringing the core out of reset so that only the desired VP starts.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Reviewed-by: Paul Burton <paul.burton@imgtec.com>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13750/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:19:12 +02:00
Huacai Chen 3ef0665398 MIPS: hpet: Increase HPET_MIN_PROG_DELTA and decrease HPET_MIN_CYCLES
At first, we prefer to use mips clockevent device, so we decrease the
rating of hpet clockevent device.

For hpet, if HPET_MIN_PROG_DELTA (minimum delta of hpet programming) is
too small and HPET_MIN_CYCLES (threshold of -ETIME checking) is too
large, then hpet_next_event() can easily return -ETIME. After commit
c6eb3f70d4 ("hrtimer: Get rid of hrtimer softirq") this will cause
a RCU stall.

So, HPET_MIN_PROG_DELTA must be sufficient that we don't re-trip the
-ETIME check -- if we do, we will return -ETIME, forward the next event
time, try to set it, return -ETIME again, and basically lock the system
up. Meanwhile, HPET_MIN_CYCLES doesn't need to be too large, 16 cycles
is enough.

This solution is similar to commit f9eccf2461 ("clocksource/drivers
/vt8500: Increase the minimum delta").

By the way, this patch ensures hpet count/compare to be 32-bit long.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J . Hill <Steven.Hill@imgtec.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13819/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:01:00 +02:00
Huacai Chen 07d69579e7 MIPS: Don't register r4k sched clock when CPUFREQ enabled
Don't register r4k sched clock when CPUFREQ enabled because sched clock
need a constant frequency.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J . Hill <Steven.Hill@caviumnetworks.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13820/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 12:00:15 +02:00
Huacai Chen 6dabf2b7a5 MIPS: Fix r4k clockevents registration
CPUFreq need min_delta_ticks/max_delta_ticks to be initialized, and
this can be done by clockevents_config_and_register().

Cc: stable@vger.kernel.org
Signed-off-by: Heiher <r@hev.cc>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J . Hill <Steven.Hill@imgtec.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: stable@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13817/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-24 11:59:48 +02:00
David S. Miller de0ba9a0d8 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Just several instances of overlapping changes.

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-24 00:53:32 -04:00
Andy Lutomirski 55920d31f1 x86/mm/cpa: Add missing comment in populate_pdg()
In commit:

  21cbc2822aa1 ("x86/mm/cpa: Unbreak populate_pgd(): stop trying to deallocate failed PUDs")

I intended to add this comment, but I failed at using git.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/242baf8612394f4e31216f96d13c4d2e9b90d1b7.1469293159.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-23 21:17:10 +02:00
Andy Lutomirski 530dd8d4b9 x86/mm/cpa: Fix populate_pgd(): Stop trying to deallocate failed PUDs
Valdis Kletnieks bisected a boot failure back to this recent commit:

  360cb4d155 ("x86/mm/cpa: In populate_pgd(), don't set the PGD entry until it's populated")

I broke the case where a PUD table got allocated -- populate_pud()
would wander off a pgd_none entry and get lost.  I'm not sure how
this survived my testing.

Fix the original issue in a much simpler way.  The problem
was that, if we allocated a PUD table, failed to populate it, and
freed it, another CPU could potentially keep using the PGD entry we
installed (either by copying it via vmalloc_fault or by speculatively
caching it).  There's a straightforward fix: simply leave the
top-level entry in place if this happens.  This can't waste any
significant amount of memory -- there are at most 256 entries like
this systemwide and, as a practical matter, if we hit this failure
path repeatedly, we're likely to reuse the same page anyway.

For context, this is a reversion with this hunk added in:

	if (ret < 0) {
+		/*
+		 * Leave the PUD page in place in case some other CPU or thread
+		 * already found it, but remove any useless entries we just
+		 * added to it.
+		 */
-		unmap_pgd_range(cpa->pgd, addr,
+		unmap_pud_range(pgd_entry, addr,
			        addr + (cpa->numpages << PAGE_SHIFT));
		return ret;
	}

This effectively open-codes what the now-deleted unmap_pgd_range()
function used to do except that unmap_pgd_range() used to try to
free the page as well.

Reported-by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Mike Krinkin <krinkin.m.u@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hp.com>
Link: http://lkml.kernel.org/r/21cbc2822aa18aa812c0215f4231dbf5f65afa7f.1469249789.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-23 21:13:25 +02:00
Dan Williams fd1d961dd6 x86/insn: remove pcommit
The pcommit instruction is being deprecated in favor of either ADR
(asynchronous DRAM refresh: flush-on-power-fail) at the platform level, or
posted-write-queue flush addresses as defined by the ACPI 6.x NFIT (NVDIMM
Firmware Interface Table).

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Acked-by: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-07-23 11:04:23 -07:00
Dan Williams dfa169bbee Revert "KVM: x86: add pcommit support"
This reverts commit 8b3e34e46a.

Given the deprecation of the pcommit instruction, the relevant VMX
features and CPUID bits are not going to be rolled into the SDM.  Remove
their usage from KVM.

Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-07-23 11:04:23 -07:00
Marc Zyngier 4c47eb1c18 arm64: KVM: VHE: Context switch MDSCR_EL1
The kprobe enablement work has uncovered that changes made by
a guest to MDSCR_EL1 were propagated to the host when VHE was
enabled, leading to unexpected exception being delivered.

Moving this register to the list of registers that are always
context-switched fixes the issue.

Fixes: 9c6c356832 ("arm64: KVM: VHE: Split save/restore of registers shared between guest and host")
Cc: stable@vger.kernel.org #4.6
Reported-by: Tirumalesh Chalamarla <Tirumalesh.Chalamarla@cavium.com>
Tested-by: Tirumalesh Chalamarla <Tirumalesh.Chalamarla@cavium.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2016-07-23 18:07:12 +02:00
Linus Torvalds 23218843d9 m68k updates for 4.8
- Assorted spelling fixes,
   - Defconfig updates.
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Merge tag 'm68k-for-v4.8-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k

Pull m68k upddates from Geert Uytterhoeven:
 - assorted spelling fixes
 - defconfig updates

* tag 'm68k-for-v4.8-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k/defconfig: Update defconfigs for v4.7-rc2
  m68k: Assorted spelling fixes
2016-07-23 12:39:08 +09:00
Linus Torvalds 7825e0c429 ARM: SoC fixes
A handful of fixes before final release:
 
 Marvell Armada:
  - One to fix a typo in the devicetree specifying memory ranges for the
    crypto engine
  - Two to deal with marking PCI and device-memory as strongly ordered to
    avoid hardware deadlocks, in particular when enabling above crypto driver.
  - Compile fix for PM
 
 Allwinner:
  - DT clock fixes to deal with u-boot-enabled framebuffer (simplefb).
  - Make R8 (C.H.I.P. SoC) inherit system compatibility from A13 to
    make clocks register proper.
 
 Tegra:
  - Fix SD card voltage setting on the Tegra3 Beaver dev board
 
 Misc:
  - Two maintainers updates for STM32 and STi platforms.
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Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "A handful of fixes before final release:

  Marvell Armada:
   - One to fix a typo in the devicetree specifying memory ranges for
     the crypto engine
   - Two to deal with marking PCI and device-memory as strongly ordered
     to avoid hardware deadlocks, in particular when enabling above
     crypto driver.
   - Compile fix for PM

  Allwinner:
   - DT clock fixes to deal with u-boot-enabled framebuffer (simplefb).
   - Make R8 (C.H.I.P. SoC) inherit system compatibility from A13 to
     make clocks register proper.

  Tegra:
   - Fix SD card voltage setting on the Tegra3 Beaver dev board

  Misc:
   - Two maintainers updates for STM32 and STi platforms"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: tegra: beaver: Allow SD card voltage to be changed
  MAINTAINERS: update STi maintainer list
  MAINTAINERS: update STM32 maintainers list
  ARM: mvebu: compile pm code conditionally
  ARM: dts: sun7i: Fix pll3x2 and pll7x2 not having a parent clock
  ARM: dts: sunxi: Add pll3 to simplefb nodes clocks lists
  ARM: dts: armada-38x: fix MBUS_ID for crypto SRAM on Armada 385 Linksys
  ARM: mvebu: map PCI I/O regions strongly ordered
  ARM: mvebu: fix HW I/O coherency related deadlocks
  ARM: sunxi/dt: make the CHIP inherit from allwinner,sun5i-a13
2016-07-23 12:32:50 +09:00
Sebastian Andrzej Siewior bdab88e006 powerpc/numa: Convert to hotplug state machine
Install the callbacks via the state machine. On the boot cpu the callback is
invoked manually because cpuhp is not up yet and everything must be
preinitialized before additional CPUs are up.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Bharata B Rao <bharata@linux.vnet.ibm.com>
Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Christophe Jaillet <christophe.jaillet@wanadoo.fr>
Cc: Anton Blanchard <anton@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160718140727.GA13132@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-07-22 21:53:17 +02:00
Stefan Agner 0a6f366a82 ARM: dts: fix STMicroelectronics compatible strings
Replace the non-standard vendor prefix stm with st for
STMicroelectronics. The drivers do not specify the vendor prefixes
since the I2C Core strips them away from the DT provided compatible
string. Therefore, changing existing device trees does not have any
impact on device detection.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Rob Herring <robh@kernel.org>
2016-07-22 14:53:16 -05:00
Stefan Agner 5edc2aae16 powerpc/dts: fix STMicroelectronics compatible strings
Replace the non-standard vendor prefix stm and st-micro with st for
STMicroelectronics. The drivers do not specify the vendor prefixes
since the I2C Core strips them away from the DT provided compatible
string. Therefore, changing existing device trees does not have any
impact on device detection.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Rob Herring <robh@kernel.org>
2016-07-22 14:53:05 -05:00
Radim Krčmář 912902ce78 KVM/ARM changes for Linux 4.8
- GICv3 ITS emulation
 - Simpler idmap management that fixes potential TLB conflicts
 - Honor the kernel protection in HYP mode
 - Removal of the old vgic implementation
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Merge tag 'kvm-arm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into next

KVM/ARM changes for Linux 4.8

- GICv3 ITS emulation
- Simpler idmap management that fixes potential TLB conflicts
- Honor the kernel protection in HYP mode
- Removal of the old vgic implementation
2016-07-22 20:27:26 +02:00
Eric Auger 180ae7b118 KVM: arm/arm64: Enable irqchip routing
This patch adds compilation and link against irqchip.

Main motivation behind using irqchip code is to enable MSI
routing code. In the future irqchip routing may also be useful
when targeting multiple irqchips.

Routing standard callbacks now are implemented in vgic-irqfd:
- kvm_set_routing_entry
- kvm_set_irq
- kvm_set_msi

They only are supported with new_vgic code.

Both HAVE_KVM_IRQCHIP and HAVE_KVM_IRQ_ROUTING are defined.
KVM_CAP_IRQ_ROUTING is advertised and KVM_SET_GSI_ROUTING is allowed.

So from now on IRQCHIP routing is enabled and a routing table entry
must exist for irqfd injection to succeed for a given SPI. This patch
builds a default flat irqchip routing table (gsi=irqchip.pin) covering
all the VGIC SPI indexes. This routing table is overwritten by the
first first user-space call to KVM_SET_GSI_ROUTING ioctl.

MSI routing setup is not yet allowed.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-07-22 18:52:01 +01:00
Eric Auger d9565a7399 KVM: Move kvm_setup_default/empty_irq_routing declaration in arch specific header
kvm_setup_default_irq_routing and kvm_setup_empty_irq_routing are
not used by generic code. So let's move the declarations in x86 irq.h
header instead of kvm_host.h.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Suggested-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-07-22 18:52:00 +01:00
Andy Lutomirski 6a79296cb1 x86/boot: Simplify EBDA-vs-BIOS reservation logic
Both the intent and the effect of reserve_bios_regions() is simple:
reserve the range from the apparent BIOS start (suitably filtered)
through 1MB and, if the EBDA start address is sensible, extend that
reservation downward to cover the EBDA as well.

The code is overcomplicated, though, and contains head-scratchers
like:

	if (ebda_start < BIOS_START_MIN)
		ebda_start = BIOS_START_MAX;

That snipped is trying to say "if ebda_start < BIOS_START_MIN,
ignore it".

Simplify it: reorder the code so that it makes sense.  This should
have no functional effect under any circumstances.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Mario Limonciello <mario_limonciello@dell.com>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hp.com>
Link: http://lkml.kernel.org/r/ef89c0c761be20ead8bd9a3275743e6259b6092a.1469135598.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-22 11:46:01 +02:00
Andy Lutomirski 30f027398b x86/boot: Clarify what x86_legacy_features.reserve_bios_regions does
It doesn't just control probing for the EBDA -- it controls whether we
detect and reserve the <1MB BIOS regions in general.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Mario Limonciello <mario_limonciello@dell.com>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hp.com>
Link: http://lkml.kernel.org/r/55bd591115498440d461857a7b64f349a5d911f3.1469135598.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-22 11:46:01 +02:00
Sudeep Holla 5a611ed969 arm64: add support for ACPI Low Power Idle(LPI)
This patch adds appropriate callbacks to support ACPI Low Power Idle
(LPI) on ARM64.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-07-21 23:29:38 +02:00
Sudeep Holla ce3ad71026 arm64: cpuidle: drop __init section marker to arm_cpuidle_init
Commit ea389daa7f (arm64: cpuidle: add __init section marker to
arm_cpuidle_init) added the __init annotation to arm_cpuidle_init
as it was not needed after booting which was correct at that time.

However with the introduction of ACPI LPI support, this will be used
from cpuhotplug path in ACPI processor driver.

This patch drops the __init annotation from arm_cpuidle_init to avoid
the following warning:

WARNING: vmlinux.o(.text+0x113c8): Section mismatch in reference from the
	function acpi_processor_ffh_lpi_probe() to the function
	.init.text:arm_cpuidle_init()

The function acpi_processor_ffh_lpi_probe() references
the function __init arm_cpuidle_init().

This is often because acpi_processor_ffh_lpi_probe() lacks a __init
annotation or the annotation of arm_cpuidle_init is wrong.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-07-21 23:29:37 +02:00
Catalin Marinas a95b0644b3 Merge branch 'for-next/kprobes' into for-next/core
* kprobes:
  arm64: kprobes: Add KASAN instrumentation around stack accesses
  arm64: kprobes: Cleanup jprobe_return
  arm64: kprobes: Fix overflow when saving stack
  arm64: kprobes: WARN if attempting to step with PSTATE.D=1
  kprobes: Add arm64 case in kprobe example module
  arm64: Add kernel return probes support (kretprobes)
  arm64: Add trampoline code for kretprobes
  arm64: kprobes instruction simulation support
  arm64: Treat all entry code as non-kprobe-able
  arm64: Blacklist non-kprobe-able symbol
  arm64: Kprobes with single stepping support
  arm64: add conditional instruction simulation support
  arm64: Add more test functions to insn.c
  arm64: Add HAVE_REGS_AND_STACK_ACCESS_API feature
2016-07-21 18:20:41 +01:00
Dave Hansen ec3ed4a210 x86/fpu: Do not BUG_ON() in early FPU code
I don't think it is really possible to have a system where CPUID
enumerates support for XSAVE but that it does not have FP/SSE
(they are "legacy" features and always present).

But, I did manage to hit this case in qemu when I enabled its
somewhat shaky XSAVE support.  The bummer is that the FPU is set
up before we parse the command-line or have *any* console support
including earlyprintk.  That turned what should have been an easy
thing to debug in to a bit more of an odyssey.

So a BUG() here is worthless.  All it does it guarantee that
if/when we hit this case we have an empty console.  So, remove
the BUG() and try to limp along by disabling XSAVE and trying to
continue.  Add a comment on why we are doing this, and also add
a common "out_disable" path for leaving fpu__init_system_xstate().

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160720194551.63BB2B58@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-21 18:18:45 +02:00
Suzuki K Poulose e75118a7b5 arm64: Honor nosmp kernel command line option
Passing "nosmp" should boot the kernel with a single processor, without
provision to enable secondary CPUs even if they are present. "nosmp" is
implemented by setting maxcpus=0. At the moment we still mark the secondary
CPUs present even with nosmp, which allows the userspace to bring them
up. This patch corrects the smp_prepare_cpus() to honor the maxcpus == 0.

Commit 44dbcc93ab ("arm64: Fix behavior of maxcpus=N") fixed the
behavior for maxcpus >= 1, but broke maxcpus = 0.

Fixes: 44dbcc93ab ("arm64: Fix behavior of maxcpus=N")
Cc: <stable@vger.kernel.org> # 4.7+
Cc: Will Deacon <will.deacon@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
[catalin.marinas@arm.com: updated code comment]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-21 16:48:37 +01:00
Suzuki K Poulose 9113c2aa05 arm64: Fix incorrect per-cpu usage for boot CPU
In smp_prepare_boot_cpu(), we invoke cpuinfo_store_boot_cpu to  store
the cpuinfo in a per-cpu ptr, before initialising the per-cpu offset for
the boot CPU. This patch reorders the sequence to make sure we initialise
the per-cpu offset before accessing the per-cpu area.

Commit 4b998ff188 ("arm64: Delay cpuinfo_store_boot_cpu") fixed the
issue where we modified the per-cpu area even before the kernel initialises
the per-cpu areas, but failed to wait until the boot cpu updated it's
offset.

Fixes: 4b998ff188 ("arm64: Delay cpuinfo_store_boot_cpu")
Cc: <stable@vger.kernel.org> # 4.4+
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-21 15:59:16 +01:00
Arnd Bergmann d95eabc7b8 Renesas ARM Based SoC DT Fixes for v4.8
* Corrections to r8a7792
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Merge tag 'renesas-dt-fixes-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/dt

Merge "Renesas ARM Based SoC DT Fixes for v4.8" from Simon Horman:

* Corrections to r8a7792

* tag 'renesas-dt-fixes-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: dts: r8a7792: remove ADSP clock
  ARM: dts: r8a7792: add PLL1 divided by 2 clock
2016-07-21 14:40:28 +02:00
Baruch Siach 17bd274e39 ARM: mps2: fix typo
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2016-07-21 14:39:21 +02:00
Adrian Hunter 25af37f4e1 x86/insn: Add AVX-512 support to the instruction decoder
Add support for Intel's AVX-512 instructions to the instruction decoder.

AVX-512 instructions are documented in Intel Architecture Instruction
Set Extensions Programming Reference (February 2016).

AVX-512 instructions are identified by a EVEX prefix which, for the
purpose of instruction decoding, can be treated as though it were a
4-byte VEX prefix.

Existing instructions which can now accept an EVEX prefix need not be
further annotated in the op code map (x86-opcode-map.txt). In the case
of new instructions, the op code map is updated accordingly.

Also add associated Mask Instructions that are used to manipulate mask
registers used in AVX-512 instructions.

The 'perf tools' instruction decoder is updated in a subsequent patch.
And a representative set of instructions is added to the perf tools new
instructions test in a subsequent patch.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: X86 ML <x86@kernel.org>
Link: http://lkml.kernel.org/r/1469003437-32706-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-07-21 09:37:11 -03:00
Arnd Bergmann 1b2d8b94c8 mvebu dt for 4.8 (part 1)
Fix dts for the clearfog board (Armada 388 SoC based)
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Merge tag 'mvebu-dt-4.8-1' of git://git.infradead.org/linux-mvebu into next/dt

Merge "mvebu dt for 4.8 (part 1)" from Gregory CLEMENT:

Fix dts for the clearfog board (Armada 388 SoC based)

* tag 'mvebu-dt-4.8-1' of git://git.infradead.org/linux-mvebu:
  ARM: dts: armada-388-clearfog: remove duplicate mdio entry
2016-07-21 14:36:51 +02:00
Arnd Bergmann 262a5d84b2 Allwinner DT changes for 4.8, take 2
Another set of changes for the 4.8 merge window, among which:
   - Reworking of the DT for the tablets based on Allwinner reference design
     and q8 designs to avoid duplication as much as possible
   - Renaming a DT merged in the first PR for consistency
   - Enable a few devices on some boards
   - New boards: Polaroid MID2407PXE03, inet86dz
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Merge tag 'sunxi-dt-for-4.8-2-bis' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into next/dt

Merge "Allwinner DT changes for 4.8, take 2" from Maxime Ripard:

Another set of changes for the 4.8 merge window, among which:
  - Reworking of the DT for the tablets based on Allwinner reference design
    and q8 designs to avoid duplication as much as possible
  - Renaming a DT merged in the first PR for consistency
  - Enable a few devices on some boards
  - New boards: Polaroid MID2407PXE03, inet86dz

* tag 'sunxi-dt-for-4.8-2-bis' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux: (21 commits)
  ARM: dts: sun8i: Add dts file for inet86dz board
  ARM: dts: sun8i: Add dts file for Polaroid MID2407PXE03 tablet
  ARM: dts: sun8i: Use sun8i-reference-design-tablet for ga10h dts
  ARM: dts: sun8i: Use sun8i-reference-design-tablet for polaroid mid2809pxe04
  ARM: dts: sun8i: reference-design-tablet: Add drivevbus-supply
  ARM: dts: Copy sun8i-q8-common.dtsi sun8i-reference-design-tablet.dtsi
  ARM: dts: sun5i: Use sun5i-reference-design-tablet.dtsi for utoo p66 dts
  ARM: dts: sun5i: Use sun5i-reference-design-tablet.dtsi for dit4350 dts
  ARM: dts: sun5i: reference-design-tablet: Remove mention of q8
  ARM: dts: sun5i: reference-design-tablet: Set lradc vref to avcc
  ARM: dts: sun5i: Rename sun5i-q8-common.dtsi sun5i-reference-design-tablet.dtsi
  ARM: dts: sun5i: Move q8 display bits to sun5i-a13-q8-tablet.dts
  ARM: dts: sunxi: Rename sunxi-q8-common.dtsi sunxi-reference-design-tablet.dtsi
  ARM: dts: sun7i: bananapi-m1-plus: red LED is power LED
  ARM: dts: sun7i: bananapi-m1-plus: Unify suffix for board specific labels
  ARM: dts: sun7i: bananapi-m1-plus: Reindent whole file using tabs
  ARM: dts: sun7i: lamobo-r1: Enable audio codec
  ARM: dts: sun7i: lamobo-r1: Fix GPIO flags in reg_ahci_5v
  ARM: dts: sun8i-h3: Rename sinovoip-bpi-m2-plus to bananapi-m2-plus
  ARM: dts: sun7i: lamobo-r1: Remove usb1 vbus regulator
  ...
2016-07-21 14:35:09 +02:00
Petar Jovanovic bcfc8f0d4a MIPS: traps: return correct si code for accessing nonmapped addresses
find_vma() returns the first VMA which satisfies fault_addr < vm_end, but
it does not guarantee fault_addr is actually within VMA. Therefore, kernel
has to check that before it chooses correct si code on return.

Signed-off-by: Petar Jovanovic <petar.jovanovic@rt-rk.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13808/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-21 14:27:32 +02:00
Catalin Marinas f7e35c5ba4 arm64: kprobes: Add KASAN instrumentation around stack accesses
This patch disables KASAN around the memcpy from/to the kernel or IRQ
stacks to avoid warnings like below:

BUG: KASAN: stack-out-of-bounds in setjmp_pre_handler+0xe4/0x170 at addr ffff800935cbbbc0
Read of size 128 by task swapper/0/1
page:ffff7e0024d72ec0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x1000000000000000()
page dumped because: kasan: bad access detected
CPU: 4 PID: 1 Comm: swapper/0 Not tainted 4.7.0-rc4+ #1
Hardware name: ARM Juno development board (r0) (DT)
Call trace:
[<ffff20000808ad88>] dump_backtrace+0x0/0x280
[<ffff20000808b01c>] show_stack+0x14/0x20
[<ffff200008563a64>] dump_stack+0xa4/0xc8
[<ffff20000824a1fc>] kasan_report_error+0x4fc/0x528
[<ffff20000824a5e8>] kasan_report+0x40/0x48
[<ffff20000824948c>] check_memory_region+0x144/0x1a0
[<ffff200008249814>] memcpy+0x34/0x68
[<ffff200008c3ee2c>] setjmp_pre_handler+0xe4/0x170
[<ffff200008c3ec5c>] kprobe_breakpoint_handler+0xec/0x1d8
[<ffff2000080853a4>] brk_handler+0x5c/0xa0
[<ffff2000080813f0>] do_debug_exception+0xa0/0x138

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-21 11:47:53 +01:00
Marc Zyngier 3b7d14e9f3 arm64: kprobes: Cleanup jprobe_return
jprobe_return seems to have aged badly. Comments referring to
non-existent behaviours, and a dangerous habit of messing
with registers without telling the compiler.

This patches applies the following remedies:
- Fix the comments to describe the actual behaviour
- Tidy up the asm sequence to directly assign the
  stack pointer without clobbering extra registers
- Mark the rest of the function as unreachable() so
  that the compiler knows that there is no need for
  an epilogue
- Stop making jprobe_return_break a global function
  (you really don't want to call that guy, and it isn't
  even a function).

Tested with tcp_probe.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-21 11:47:52 +01:00
Alastair D'Silva 4a1202765d powerpc: Add module autoloading based on CPU features
This patch provides the necessary infrastructure to allow drivers
to be automatically loaded via udev. It implements the minimum
required to be able to use module_cpu_feature_match() to trigger
the GENERIC_CPU_AUTOPROBE mechanisms.

The features exposed are a mirror of the cpu_user_features
(converted to an offset from a mask). This decision was made to
ensure that the behavior between features for module loading and
userspace are consistent.

Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
[mpe: Only define the bits we currently need]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 20:33:57 +10:00
Alexey Kardashevskiy 802a345183 powerpc/powernv/ioda: Fix endianness when reading TCEs
The iommu_table_ops::exchange() callback writes new TCE to the table and
returns old value and permission mask. The old TCE value is correctly
converted from BE to CPU endian; however permission mask was calculated
from BE value and therefore always returned DMA_NONE which could cause
memory leak on LE systems using VFIO SPAPR TCE IOMMU v1 driver.

This fixes pnv_tce_xchg() to have @oldtce a CPU endian.

Fixes: 05c6cfb9dc ("powerpc/iommu/powernv: Release replaced TCE")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 20:21:06 +10:00
Sukadev Bhattiprolu 0eab46be21 powerpc/mm: Add memory barrier in __hugepte_alloc()
__hugepte_alloc() uses kmem_cache_zalloc() to allocate a zeroed PTE
and proceeds to use the newly allocated PTE. Add a memory barrier to
make sure that the other CPUs see a properly initialized PTE.

Based on a fix suggested by James Dykman.

Reported-by: James Dykman <jdykman@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Tested-by: James Dykman <jdykman@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 20:13:28 +10:00
Michael Ellerman 31278b17a0 powerpc/modules: Never restore r2 for a mprofile-kernel style mcount() call
In the module loader we process relocations, and for long jumps we
generate trampolines (aka stubs). At the call site for one of these
trampolines we usually need to generate a load instruction to restore
the TOC pointer into r2.

There is one exception however, which is calls to mcount() using the
mprofile-kernel ABI, they handle the TOC inside the stub, and so for
them we do not generate a TOC load.

The bug is in how the code in restore_r2() decides if it needs to
generate the TOC load. It does so by looking for a nop following the
branch, and if it sees a nop, it replaces it with the load. In general
the compiler has no reason to generate a nop following the mcount()
call and so that check works OK.

However if we combine a jump label at the start of a function, with an
early return, such that GCC applies the shrink-wrapping optimisation, we
can then end up with an mcount call followed immediately by a nop.
However the nop is not there for a TOC load, it is for the jump label.

That confuses restore_r2() into replacing the jump label nop with a TOC
load, which in turn confuses ftrace into replacing the mcount call with
a b +8 (fixed in the previous commit). The end result is we jump over
the jump label, which if it was supposed to return means we incorrectly
run the body of the function.

We have seen this in practice with some yet-to-be-merged patches that
use jump labels more extensively.

The fix is relatively simple, in restore_r2() we check for an
mprofile-kernel style mcount() call first, before looking for the
presence of a nop.

Fixes: 153086644f ("powerpc/ftrace: Add support for -mprofile-kernel ftrace ABI")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 20:10:42 +10:00
Michael Ellerman 9d63610951 powerpc/ftrace: Separate the heuristics for checking call sites
In __ftrace_make_nop() (the 64-bit version), we have code to deal with
two ftrace ABIs. There is the original ABI, which looks mostly like a
function call, and then the mprofile-kernel ABI which is just a branch.

The code tries to handle both cases, by looking for the presence of a
load to restore the TOC pointer (PPC_INST_LD_TOC). If we detect the TOC
load, we assume the call site is for an mcount() call using the old ABI.
That means we patch the mcount() call with a b +8, to branch over the
TOC load.

However if the kernel was built with mprofile-kernel, then there will
never be a call site using the original ftrace ABI. If for some reason
we do see a TOC load, then it's there for a good reason, and we should
not jump over it.

So split the code, using the existing CC_USING_MPROFILE_KERNEL. Kernels
built with mprofile-kernel will only look for, and expect, the new ABI,
and similarly for the original ABI.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 20:10:37 +10:00
Dan Carpenter 008d0cf1ec MIPS: Octeon: Off by one in octeon_irq_gpio_map()
It should be >= ARRAY_SIZE() instead of > ARRAY_SIZE().

Fixes: 64b139f97c ('MIPS: OCTEON: irq: add CIB and other fixes')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-mips@linux-mips.org
Cc: kernel-janitors@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13813/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-21 11:20:10 +02:00
Benjamin Herrenschmidt b1923caa6e powerpc: Merge 32-bit and 64-bit setup_arch()
There is little enough differences now.

mpe: Add a/p/k/setup.h to contain the prototypes and empty versions of
functions we need, rather than using weak functions. Add a few other
empty versions to avoid as many #ifdefs as possible in the code.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 19:17:46 +10:00
Benjamin Herrenschmidt 009776baa1 powerpc/64: Make a few boot functions __init
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 19:17:25 +10:00
Benjamin Herrenschmidt f7b9ebb79e powerpc: Re-order setup_panic()
Do it right after probe_machine() since it's about testing ppc_md,
and put the test in the common code.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 19:17:23 +10:00
Benjamin Herrenschmidt e39afba3aa powerpc: Re-order the call to smp_setup_cpu_maps()
It makes more sense to do it before intializing xmon() as xmon might
use the info in there. We do want to register the console early
though in case we want some functioning printk's in the cpu map setup.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 19:14:32 +10:00
Benjamin Herrenschmidt 8f212cb26f powerpc/32: Move cache info inits to a separate function
Matches 64-bit. Also move the call to the same spot as ppc64

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 19:14:32 +10:00
Benjamin Herrenschmidt fa745a129c powerpc/64: Move the content of setup_system() to setup_arch()
And kill setup_system().

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 19:14:29 +10:00
Daniel Borkmann b4e76f7e6d bpf, mips: fix off-by-one in ctx offset allocation
Dan Carpenter reported [1] a static checker warning that ctx->offsets[]
may be accessed off by one from build_body(), since it's allocated with
fp->len * sizeof(*ctx.offsets) as length. The cBPF arm and ppc code
doesn't have this issue as claimed, so only mips seems to be affected and
should like most other JITs allocate with fp->len + 1. A few number of
JITs (x86, sparc, arm64) handle this differently, where they only require
fp->len array elements.

  [1] http://www.spinics.net/lists/mips/msg64193.html

Fixes: c6610de353 ("MIPS: net: Add BPF JIT")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: ast@kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13814/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-21 11:12:34 +02:00
Benjamin Herrenschmidt 9df549afea powerpc/64: Move setting of {i,d}cache_bsize to initialize_cache_info()
Also remove the completely osbolete comment. We *do* look in the
device-tree.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 19:08:06 +10:00
Benjamin Herrenschmidt bf1b61fb57 powerpc/64: Move the boot time info banner to a separate function
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 19:08:05 +10:00
Benjamin Herrenschmidt f2d576948d powerpc: Get rid of ppc_md.init_early()
It is now called right after platform probe, so the probe function
can just do the job.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 19:07:26 +10:00
Benjamin Herrenschmidt 5657138404 powerpc: Move 32-bit probe() machine to later in the boot process
This converts all the 32-bit platforms to use the expanded device-tree
which is a pretty mechanical change. Unlike 64-bit, the 32-bit kernel
didn't rely on platform initializations to setup the MMU since it
sets it up entirely before probe_machine() so the move has comparatively
less consequences though it's a bigger patch.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 19:06:42 +10:00
Dan Carpenter 58a7e1c140 MIPS: RM7000: Double locking bug in rm7k_tc_disable()
We obviously intended to enable IRQs again at the end.

Fixes: 745aef5df1 ('MIPS: RM7000: Add support for tertiary cache')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13815/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-21 10:59:46 +02:00
Benjamin Herrenschmidt 406b0b6ae3 powerpc/64: Move 64-bit probe_machine() to later in the boot process
We no long need the machine type that early, so we can move probe_machine()
to after the device-tree has been expanded. This will allow further
consolidation.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:59:22 +10:00
Benjamin Herrenschmidt 84b62c72fa powerpc: Ensure that ppc_md is empty before probing for machine type
Anything in there will be overwritten, so it helps catching nasty
bugs if we check that it's indeed full of NULL's before we do so.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:59:21 +10:00
Benjamin Herrenschmidt 7025776ed1 powerpc/mm: Move hash table ops to a separate structure
Moving probe_machine() to after mmu init will cause the ppc_md
fields relative to the hash table management to be overwritten.

Since we have essentially disconnected the machine type from
the hash backend ops, finish the job by moving them to a different
structure.

The only callback that didn't quite fix is update_partition_table
since this is not specific to hash, so I moved it to a standalone
variable for now. We can revisit later if needed.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[mpe: Fix ppc64e build failure in kexec]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:59:09 +10:00
Benjamin Herrenschmidt b521f576df powerpc/pmac: Remove spurrious machine type test
pmac_declare_of_platform_devices() is already a machine initcall, thus
it won't be called on a non-powermac machine. Testing for chrp there
is pointless.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:58:26 +10:00
Benjamin Herrenschmidt 2b4e3ad8f5 powerpc/mm/hash64: Don't test for machine type to detect HEA special case
Instead, check for FW_FEATURE_SPLPAR. This should be roughtly equivalent
as all pseries machiens that can have an HEA also support SPLPAR and
no other machine type does.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:58:25 +10:00
Benjamin Herrenschmidt 5556ecf5e9 powerpc/mm/hash: Don't use machine_is() early during boot
Use the device-tree instead as we'll be moving probe_machine()
out of early_setup

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:58:21 +10:00
Benjamin Herrenschmidt 388dc1c3f0 powerpc/pasemi: Remove IOBMAP allocation from platform probe()
These days, memblocks is available later, so we can just allocate it
as part of iob_init.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:56:38 +10:00
Benjamin Herrenschmidt 166dd7d3fb powerpc/64: Move MMU backend selection out of platform code
We move it into early_mmu_init() based on firmware features. For PS3,
we have to move the setting of these into early_init_devtree().

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:56:38 +10:00
Benjamin Herrenschmidt 91b6fad5cf powerpc/pmac: Remove early allocation of the SMU command buffer
The SMU command buffer needs to be allocated below 2G using memblock.

In the past, this had to be done very early from the arch code as
memblock wasn't available past that point. That is no longer the
case though, smu_init() is called from setup_arch() when memblock
is still functional these days. So move the allocation to the
SMU driver itself.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:56:38 +10:00
Benjamin Herrenschmidt d3cbff1b5a powerpc: Put exception configuration in a common place
The various calls to establish exception endianness and AIL are
now done from a single point using already established CPU and FW
feature bits to decide what to do.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:56:31 +10:00
Benjamin Herrenschmidt 3808a88985 powerpc: Move FW feature probing out of pseries probe()
We move the function itself to pseries/firmware.c and call it along
with almost all other flat device-tree parsers from early_init_devtree()

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[mpe: Move #ifdefs into the header by providing pseries_probe_fw_features()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:56:13 +10:00
Benjamin Herrenschmidt c40785ad30 powerpc/dart: Use a cachable DART
Instead of punching a hole in the linear mapping, just use normal
cachable memory, and apply the flush sequence documented in the
CPC625 (aka U3) user manual.

This allows us to remove quite a bit of code related to the early
allocation of the DART and the hole in the linear mapping. We can
also get rid of the copy of the DART for suspend/resume as the
original memory can just be saved/restored now, as long as we
properly sync the caches.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[mpe: Integrate dart_init() fix to return ENODEV when DART disabled]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:55:54 +10:00
Benjamin Herrenschmidt de4cf3de59 powerpc: Move 64-bit memory reserves to setup_arch()
There is really no need to do them that early, early_setup() runs
before MMU is on, we should do the strict minimum there to get the
MMU going.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:54:55 +10:00
Benjamin Herrenschmidt c4bd6cb87c powerpc: Move 64-bit feature fixup earlier
Make it part of early_setup() as we really want the feature fixups
to be applied before we turn on the MMU since they can have an impact
on the various assembly path related to MMU management and interrupts.

This makes 64-bit match what 32-bit does.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:54:55 +10:00
Matt Redfearn 253aced6d2 MIPS: Octeon: cavium_octeon_defconfig: Enable OCTEON SATA
Commit a2127e400e ("libata: support AHCI on OCTEON platform") added a
driver for the OCTEON AHCI controller. Enable this driver in the OCTEON
defconfig.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13816/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-07-21 10:54:04 +02:00
Benjamin Herrenschmidt 9402c68461 powerpc: Factor do_feature_fixup calls
32 and 64-bit do a similar set of calls early on, we move it all to
a single common function to make the boot code more readable.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-21 18:51:42 +10:00
Ingo Molnar edce21216a x86/boot: Reorganize and clean up the BIOS area reservation code
So the reserve_ebda_region() code has accumulated a number of
problems over the years that make it really difficult to read
and understand:

- The calculation of 'lowmem' and 'ebda_addr' is an unnecessarily
  interleaved mess of first lowmem, then ebda_addr, then lowmem tweaks...

- 'lowmem' here means 'super low mem' - i.e. 16-bit addressable memory. In other
  parts of the x86 code 'lowmem' means 32-bit addressable memory... This makes it
  super confusing to read.

- It does not help at all that we have various memory range markers, half of which
  are 'start of range', half of which are 'end of range' - but this crucial
  property is not obvious in the naming at all ... gave me a headache trying to
  understand all this.

- Also, the 'ebda_addr' name sucks: it highlights that it's an address (which is
  obvious, all values here are addresses!), while it does not highlight that it's
  the _start_ of the EBDA region ...

- 'BIOS_LOWMEM_KILOBYTES' says a lot of things, except that this is the only value
  that is a pointer to a value, not a memory range address!

- The function name itself is a misnomer: it says 'reserve_ebda_region()' while
  its main purpose is to reserve all the firmware ROM typically between 640K and
  1MB, while the 'EBDA' part is only a small part of that ...

- Likewise, the paravirt quirk flag name 'ebda_search' is misleading as well: this
  too should be about whether to reserve firmware areas in the paravirt case.

- In fact thinking about this as 'end of RAM' is confusing: what this function
  *really* wants to reserve is firmware data and code areas! Once the thinking is
  inverted from a mixed 'ram' and 'reserved firmware area' notion to a pure
  'reserved area' notion everything becomes a lot clearer.

To improve all this rewrite the whole code (without changing the logic):

- Firstly invert the naming from 'lowmem end' to 'BIOS reserved area start'
  and propagate this concept through all the variable names and constants.

	BIOS_RAM_SIZE_KB_PTR		// was: BIOS_LOWMEM_KILOBYTES

	BIOS_START_MIN			// was: INSANE_CUTOFF

	ebda_start			// was: ebda_addr
	bios_start			// was: lowmem

	BIOS_START_MAX			// was: LOWMEM_CAP

- Then clean up the name of the function itself by renaming it
  to reserve_bios_regions() and renaming the ::ebda_search paravirt
  flag to ::reserve_bios_regions.

- Fix up all the comments (fix typos), harmonize and simplify their
  formulation and remove comments that become unnecessary due to
  the much better naming all around.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-21 10:11:57 +02:00
Mark Brown a485f5fc8c Merge remote-tracking branches 'regulator/topic/qcom-spmi', 'regulator/topic/rn5t618', 'regulator/topic/tps65218' and 'regulator/topic/twl' into regulator-next 2016-07-20 18:02:08 +01:00
Marc Zyngier ab4c1325d4 arm64: kprobes: Fix overflow when saving stack
The MIN_STACK_SIZE macro tries evaluate how much stack space needs
to be saved in the jprobes_stack array, sized at 128 bytes.

When using the IRQ stack, said macro can happily return up to
IRQ_STACK_SIZE, which is 16kB. Mayhem follows.

This patch fixes things by getting rid of the crazy macro and
limiting the copy to be at most the size of the jprobes_stack
array, no matter which stack we're on.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-20 17:54:35 +01:00
Vladimir Kondratiev b4dff28740 ARC: dma: fix address translation in arc_dma_free
page should be calculated using physical address.
If platform uses non-trivial dma-to-phys memory translation,
dma_handle should be converted to physicval address before
calculation of page.

Failing to do so results in struct page * pointing to
wrong or non-existent memory.

Fixes: f2e3d55397 ("ARC: dma: reintroduce platform specific dma<->phys")
Cc: stable@vger.kernel.org #4.6+
Signed-off-by: Vladimir Kondratiev <vladimir.kondratiev@intel.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-07-20 09:54:22 -07:00
Adrian Hunter 6f6ef07f41 x86/insn: perf tools: Fix vcvtph2ps instruction decoding
vcvtph2ps does not have an immediate operand, so remove the erroneous
'Ib' from its opcode map entry. Add vcvtph2ps to the perf tools new
instructions test to verify it.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: X86 ML <x86@kernel.org>
Link: http://lkml.kernel.org/r/1469003437-32706-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-07-20 09:57:46 -03:00
Peter Zijlstra 08e237fa56 x86/cpu: Add workaround for MONITOR instruction erratum on Goldmont based CPUs
Monitored cached line may not wake up from mwait on certain
Goldmont based CPUs. This patch will avoid calling
current_set_polling_and_test() and thereby not set the TIF_ flag.
The result is that we'll always send IPIs for wakeups.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1468867270-18493-1-git-send-email-jacob.jun.pan@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-20 09:48:40 +02:00
Ingo Molnar 4fffe71dd9 Merge branch 'linus' into x86/cpu, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-20 09:46:42 +02:00
Paul Gortmaker a47177d360 x86, crypto: Restore MODULE_LICENSE() to glue_helper.c so it loads
In commit:

  eb008eb6f8 ("x86: Audit and remove any remaining unnecessary uses of module.h")

... we looked for instances of module.h that were not supporting anything
more than exported symbols.

To facilitate the exchange of module.h to the much smaller export.h
we occasionally remove tags like MODULE_AUTHOR() etc. which in the case
of built in files, are no-ops and hence that is fine, assuming the
info is already in the comments at the top of the file..

However the error here is that I overlooked that this file was used
not as a driver, but as a library of functions, and hence has no
explicit modular linkage functions or similar, making it _appear_
non-modular.  We can see that in retrospect with:

  arch/x86/crypto/Makefile:obj-$(CONFIG_CRYPTO_GLUE_HELPER_X86) += glue_helper.o

  crypto/Kconfig:config CRYPTO_GLUE_HELPER_X86
  crypto/Kconfig: tristate

Since we removed what was an active MODULE_LICENSE(), the module failed
to load and then automated testing showed the missing glue helpers as:

  glue_helper: Unknown symbol blkcipher_walk_done (err 0)
  glue_helper: Unknown symbol blkcipher_walk_virt (err 0)
  glue_helper: Unknown symbol kernel_fpu_end (err 0)
  glue_helper: Unknown symbol kernel_fpu_begin (err 0)
  glue_helper: Unknown symbol blkcipher_walk_virt_block (err 0)

So we do a partial revert of that change to just this one file, and
watch for similar MODULE_LICENSE() only cases in future audits.

Reported-by: kernel test robot <xiaolong.ye@intel.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-crypto@vger.kernel.org
Cc: lkp@01.org
Fixes: eb008eb6f8 ("x86: Audit and remove any remaining unnecessary uses of module.h")
Link: http://lkml.kernel.org/r/20160719144243.GK21225@windriver.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-20 09:39:50 +02:00
Alexey Brodkin 627c88b68f ARC: typo fix in mm/ioremap.c
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-07-19 13:57:34 -07:00
Will Deacon 44bd887ce1 arm64: kprobes: WARN if attempting to step with PSTATE.D=1
Stepping with PSTATE.D=1 is bad news. The step won't generate a debug
exception and we'll likely walk off into random data structures. This
should never happen, but when it does, it's a PITA to debug. Add a
WARN_ON to shout if we realise this is about to take place.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 17:00:29 +01:00
Will Deacon 2572214170 arm64: debug: remove unused local_dbg_{enable, disable} macros
The debug enable/disable macros are not used anywhere in the kernel, so
remove them from irqflags.h

Reported-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 16:59:40 +01:00
Will Deacon 6b68e14e71 arm64: debug: remove redundant spsr manipulation
There is no need to explicitly clear the SS bit immediately before
setting it unconditionally.

Reported-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 16:58:56 +01:00
Will Deacon 2ce39ad151 arm64: debug: unmask PSTATE.D earlier
Clearing PSTATE.D is one of the requirements for generating a debug
exception. The arm64 booting protocol requires that PSTATE.D is set,
since many of the debug registers (for example, the hw_breakpoint
registers) are UNKNOWN out of reset and could potentially generate
spurious, fatal debug exceptions in early boot code if PSTATE.D was
clear. Once the debug registers have been safely initialised, PSTATE.D
is cleared, however this is currently broken for two reasons:

(1) The boot CPU clears PSTATE.D in a postcore_initcall and secondary
    CPUs clear PSTATE.D in secondary_start_kernel. Since the initcall
    runs after SMP (and the scheduler) have been initialised, there is
    no guarantee that it is actually running on the boot CPU. In this
    case, the boot CPU is left with PSTATE.D set and is not capable of
    generating debug exceptions.

(2) In a preemptible kernel, we may explicitly schedule on the IRQ
    return path to EL1. If an IRQ occurs with PSTATE.D set in the idle
    thread, then we may schedule the kthread_init thread, run the
    postcore_initcall to clear PSTATE.D and then context switch back
    to the idle thread before returning from the IRQ. The exception
    return path will then restore PSTATE.D from the stack, and set it
    again.

This patch fixes the problem by moving the clearing of PSTATE.D earlier
to proc.S. This has the desirable effect of clearing it in one place for
all CPUs, long before we have to worry about the scheduler or any
exception handling. We ensure that the previous reset of MDSCR_EL1 has
completed before unmasking the exception, so that any spurious
exceptions resulting from UNKNOWN debug registers are not generated.

Without this patch applied, the kprobes selftests have been seen to fail
under KVM, where we end up attempting to step the OOL instruction buffer
with PSTATE.D set and therefore fail to complete the step.

Cc: <stable@vger.kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Reported-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 16:56:46 +01:00
Mark Rutland f8fa70f392 arm64: localise Image objcopy flags
We currently define OBJCOPYFLAGS in the top-level arm64 Makefile, and
thus these flags will be passed to all uses of objcopy, kernel-wide, for
which they are not explicitly overridden. The flags we set are intended
for converting vmlinux (and ELF) into Image (a raw binary), and thus the
flags chosen are problematic for some other uses which do not expect a
raw binary result, e.g. the upcoming lkdtm rodata test:

  http://www.openwall.com/lists/kernel-hardening/2016/06/08/2

This patch localises the objcopy flags such that they are only used for
the vmlinux -> Image conversion.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Kees Cook <keescook@chromium.org>
Tested-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 15:30:23 +01:00
Vladimir Murzin 9df53ff2bb arm64: ptrace: remove extra define for CPSR's E bit
...and do not confuse source navigation tools ;)

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 15:27:43 +01:00
Sandeepa Prabhu fcfd708b8c arm64: Add kernel return probes support (kretprobes)
The pre-handler of this special 'trampoline' kprobe executes the return
probe handler functions and restores original return address in ELR_EL1.
This way the saved pt_regs still hold the original register context to be
carried back to the probed kernel function.

Signed-off-by: Sandeepa Prabhu <sandeepa.s.prabhu@gmail.com>
Signed-off-by: David A. Long <dave.long@linaro.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 15:03:22 +01:00
William Cohen da6a91252a arm64: Add trampoline code for kretprobes
The trampoline code is used by kretprobes to capture a return from a probed
function.  This is done by saving the registers, calling the handler, and
restoring the registers. The code then returns to the original saved caller
return address. It is necessary to do this directly instead of using a
software breakpoint because the code used in processing that breakpoint
could itself be kprobe'd and cause a problematic reentry into the debug
exception handler.

Signed-off-by: William Cohen <wcohen@redhat.com>
Signed-off-by: David A. Long <dave.long@linaro.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
[catalin.marinas@arm.com: removed unnecessary masking of the PSTATE bits]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 15:03:22 +01:00
Sandeepa Prabhu 39a67d49ba arm64: kprobes instruction simulation support
Kprobes needs simulation of instructions that cannot be stepped
from a different memory location, e.g.: those instructions
that uses PC-relative addressing. In simulation, the behaviour
of the instruction is implemented using a copy of pt_regs.

The following instruction categories are simulated:
 - All branching instructions(conditional, register, and immediate)
 - Literal access instructions(load-literal, adr/adrp)

Conditional execution is limited to branching instructions in
ARM v8. If conditions at PSTATE do not match the condition fields
of opcode, the instruction is effectively NOP.

Thanks to Will Cohen for assorted suggested changes.

Signed-off-by: Sandeepa Prabhu <sandeepa.s.prabhu@gmail.com>
Signed-off-by: William Cohen <wcohen@redhat.com>
Signed-off-by: David A. Long <dave.long@linaro.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
[catalin.marinas@arm.com: removed linux/module.h include]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 15:03:21 +01:00
Pratyush Anand 888b3c8720 arm64: Treat all entry code as non-kprobe-able
Entry symbols are not kprobe safe. So blacklist them for kprobing.

Signed-off-by: Pratyush Anand <panand@redhat.com>
Signed-off-by: David A. Long <dave.long@linaro.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
[catalin.marinas@arm.com: Do not include syscall wrappers in .entry.text]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 15:03:21 +01:00
Pratyush Anand 44b53f67c9 arm64: Blacklist non-kprobe-able symbol
Add all function symbols which are called from do_debug_exception under
NOKPROBE_SYMBOL, as they can not kprobed.

Signed-off-by: Pratyush Anand <panand@redhat.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 15:03:20 +01:00
Sandeepa Prabhu 2dd0e8d2d2 arm64: Kprobes with single stepping support
Add support for basic kernel probes(kprobes) and jump probes
(jprobes) for ARM64.

Kprobes utilizes software breakpoint and single step debug
exceptions supported on ARM v8.

A software breakpoint is placed at the probe address to trap the
kernel execution into the kprobe handler.

ARM v8 supports enabling single stepping before the break exception
return (ERET), with next PC in exception return address (ELR_EL1). The
kprobe handler prepares an executable memory slot for out-of-line
execution with a copy of the original instruction being probed, and
enables single stepping. The PC is set to the out-of-line slot address
before the ERET. With this scheme, the instruction is executed with the
exact same register context except for the PC (and DAIF) registers.

Debug mask (PSTATE.D) is enabled only when single stepping a recursive
kprobe, e.g.: during kprobes reenter so that probed instruction can be
single stepped within the kprobe handler -exception- context.
The recursion depth of kprobe is always 2, i.e. upon probe re-entry,
any further re-entry is prevented by not calling handlers and the case
counted as a missed kprobe).

Single stepping from the x-o-l slot has a drawback for PC-relative accesses
like branching and symbolic literals access as the offset from the new PC
(slot address) may not be ensured to fit in the immediate value of
the opcode. Such instructions need simulation, so reject
probing them.

Instructions generating exceptions or cpu mode change are rejected
for probing.

Exclusive load/store instructions are rejected too.  Additionally, the
code is checked to see if it is inside an exclusive load/store sequence
(code from Pratyush).

System instructions are mostly enabled for stepping, except MSR/MRS
accesses to "DAIF" flags in PSTATE, which are not safe for
probing.

This also changes arch/arm64/include/asm/ptrace.h to use
include/asm-generic/ptrace.h.

Thanks to Steve Capper and Pratyush Anand for several suggested
Changes.

Signed-off-by: Sandeepa Prabhu <sandeepa.s.prabhu@gmail.com>
Signed-off-by: David A. Long <dave.long@linaro.org>
Signed-off-by: Pratyush Anand <panand@redhat.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 15:03:20 +01:00
David A. Long 2af3ec08b4 arm64: add conditional instruction simulation support
Cease using the arm32 arm_check_condition() function and replace it with
a local version for use in deprecated instruction support on arm64. Also
make the function table used by this available for future use by kprobes
and/or uprobes.

This function is derived from code written by Sandeepa Prabhu.

Signed-off-by: Sandeepa Prabhu <sandeepa.s.prabhu@gmail.com>
Signed-off-by: David A. Long <dave.long@linaro.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 15:03:19 +01:00
David A. Long d59bee8872 arm64: Add more test functions to insn.c
Certain instructions are hard to execute correctly out-of-line (as in
kprobes).  Test functions are added to insn.[hc] to identify these.  The
instructions include any that use PC-relative addressing, change the PC,
or change interrupt masking. For efficiency and simplicity test
functions are also added for small collections of related instructions.

Signed-off-by: David A. Long <dave.long@linaro.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 15:03:19 +01:00
David A. Long 0a8ea52c3e arm64: Add HAVE_REGS_AND_STACK_ACCESS_API feature
Add HAVE_REGS_AND_STACK_ACCESS_API feature for arm64, including supporting
functions and defines.

Signed-off-by: David A. Long <dave.long@linaro.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
[catalin.marinas@arm.com: Remove unused functions]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-19 15:03:18 +01:00
Wei Yongjun f6329088b3 x86/apic: Remove duplicated include from probe_64.c
Remove duplicated include.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Link: http://lkml.kernel.org/r/1468929740-8999-1-git-send-email-weiyj_lk@163.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-07-19 16:02:31 +02:00
Wei Yongjun 2384d1d832 x86/ce4100: Remove duplicated include from ce4100.c
Remove duplicated include.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Link: http://lkml.kernel.org/r/1468929731-8900-1-git-send-email-weiyj_lk@163.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-07-19 16:02:17 +02:00
Kevin Hao 27d1149667 powerpc/32: Remove RELOCATABLE_PPC32
It is seldom used in the kernel code and can be easily replaced by
either RELOCATABLE or PPC32. So there is no reason to keep a separate
kernel option for this.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-19 20:17:07 +10:00
Kevin Hao 4c91bd6eea powerpc: Merge the RELOCATABLE config entries for ppc32 and ppc64
It makes no sense to keep two separate RELOCATABLE config entries for
ppc32 and ppc64 respectively. Merge them into one and move it to a
common place.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-19 20:16:59 +10:00
Kevin Hao da42307146 powerpc/32/booke: Fix the build error when CRASH_DUMP is enabled
In the current code, the RELOCATABLE will be forcedly enabled when
enabling CRASH_DUMP. But for ppc32, the RELOCABLE also depend on
ADVANCED_OPTIONS and select NONSTATIC_KERNEL. This will cause the
following build error when CRASH_DUMP=y && ADVANCED_OPTIONS=n because
the select of NONSTATIC_KERNEL doesn't take effect.

  arch/powerpc/include/asm/io.h: In function 'virt_to_phys':
  arch/powerpc/include/asm/page.h:113:26: error: 'virt_phys_offset' undeclared (first use in this function)
   #define VIRT_PHYS_OFFSET virt_phys_offset
                          ^
It doesn't have any strong reasons to make the RELOCATABLE depend on
ADVANCED_OPTIONS. So remove this dependency to fix this issue.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-19 20:16:36 +10:00
John Allen 1dc7595666 powerpc/pseries: Use kernel hotplug queue for PowerVM hotplug events
The sysfs interface used to handle PowerVM hotplug events should use the
hotplug queue as well. PRRN events will soon be placing many hotplug
events on the queue at once and we will need ordinary hotplug events to
use the queue as well in order to ensure these events will still be handled
and that proper serialization is maintained during the PRRN event.

Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-19 20:12:31 +10:00
John Allen b7d9eb397b powerpc/pseries: Add support for hotplug interrupt source
Add handler for new hotplug interrupt. For memory and CPU hotplug events,
we will add the hotplug errorlog to the hotplug workqueue. Since PCI
hotplug is not currently supported in the kernel, PCI hotplug events are
written to the rtas_log_bug and are handled by rtas_errd.

Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-19 20:12:30 +10:00
John Allen 9054619ef5 powerpc/pseries: Add pseries hotplug workqueue
In support of PAPR changes to add a new hotplug interrupt, introduce a
hotplug workqueue to avoid processing hotplug events in interrupt context.
We will also take advantage of the queue on PowerVM to ensure hotplug
events initiated from different sources (HMC and PRRN events) are handled
and serialized properly.

Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-19 20:12:30 +10:00
Ian Munsie c2ca9f6b4c powerpc/powernv: Fix pci-cxl.c build when CONFIG_MODULES=n
pnv_cxl_enable_phb_kernel_api() grabs a reference to the cxl module to
prevent it from being unloaded after the PHB has been switched to CX4
mode. This breaks the build when CONFIG_MODULES=n as module_mutex
doesn't exist.

However, if we don't have modules, we don't need to protect against the
case of the cxl module being unloaded. As such, split the relevant code
out into a function surrounded with #if IS_MODULE(CXL) so we don't try
to compile it if cxl isn't being compiled as a module.

Fixes: 5918dbc9b4ec ("powerpc/powernv: Add support for the cxl kernel api on the real phb")
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-19 20:12:28 +10:00
Aneesh Kumar K.V a4b349540a powerpc/mm: Cleanup LPCR defines
This makes it easy to verify we are not overloading the bits.
No functionality change by this patch.

mpe: Cleanup more. Completely fixup whitespace, convert all UL values to
ASM_CONST(), and replace all occurrences of 63-x with the actual shift.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-19 20:12:28 +10:00
Stephen Rothwell a203800d97 x86/headers: Include spinlock_types.h in x8664_ksyms_64.c for missing spinlock_t
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-next@vger.kernel.org
Fixes: 186f43608a ("x86/kernel: Audit and remove any unnecessary uses of module.h")
Link: http://lkml.kernel.org/r/20160718182922.7b41f923@canb.auug.org.au
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-19 09:59:07 +02:00
Geert Uytterhoeven 6bd80f3723 m68k/defconfig: Update defconfigs for v4.7-rc2
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2016-07-19 09:35:54 +02:00
Andy Lutomirski 57f90c3dfc x86/vdso: Error out if the vDSO isn't a valid DSO
Some distros has been playing with toolchain changes that can affect
the type of ELF objects built.  Occasionally, this goes wrong and
the vDSO ends up not being a DSO at all.  This causes the kernel to
end up broken in a surprisingly subtle way -- glibc apparently
silently ignores a vDSO that isn't a DSO, so everything works,
albeit slowly, until users try a different libc implementation.

Make the kernel build process a bit more robust: fail outright if
the vDSO isn't ET_DYN or is missing its PT_DYNAMIC segment.  I've
never seen this in an unmodified kernel.

See: https://github.com/docker/docker/issues/23378

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/8a30e0a07c3b47ff917a8daa2df5e407cc0c6698.1468878336.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-19 08:50:24 +02:00
Arnd Bergmann 58ab5e0c2c Kbuild: arch: look for generated headers in obtree
There are very few files that need add an -I$(obj) gcc for the preprocessor
or the assembler. For C files, we add always these for both the objtree and
srctree, but for the other ones we require the Makefile to add them, and
Kbuild then adds it for both trees.

As a preparation for changing the meaning of the -I$(obj) directive to
only refer to the srctree, this changes the two instances in arch/x86 to use
an explictit $(objtree) prefix where needed, otherwise we won't find the
headers any more, as reported by the kbuild 0day builder.

arch/x86/realmode/rm/realmode.lds.S:75:20: fatal error: pasyms.h: No such file or directory

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-18 21:31:35 +02:00
Andre Przywara 0e4e82f154 KVM: arm64: vgic-its: Enable ITS emulation as a virtual MSI controller
Now that all ITS emulation functionality is in place, we advertise
MSI functionality to userland and also the ITS device to the guest - if
userland has configured that.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-07-18 18:14:38 +01:00
Andre Przywara 1085fdc68c KVM: arm64: vgic-its: Introduce new KVM ITS device
Introduce a new KVM device that represents an ARM Interrupt Translation
Service (ITS) controller. Since there can be multiple of this per guest,
we can't piggy back on the existing GICv3 distributor device, but create
a new type of KVM device.
On the KVM_CREATE_DEVICE ioctl we allocate and initialize the ITS data
structure and store the pointer in the kvm_device data.
Upon an explicit init ioctl from userland (after having setup the MMIO
address) we register the handlers with the kvm_io_bus framework.
Any reference to an ITS thus has to go via this interface.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-07-18 18:14:35 +01:00
Andre Przywara b46f01ce4d KVM: arm/arm64: Extend arch CAP checks to allow per-VM capabilities
KVM capabilities can be a per-VM property, though ARM/ARM64 currently
does not pass on the VM pointer to the architecture specific
capability handlers.
Add a "struct kvm*" parameter to those function to later allow proper
per-VM capability reporting.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Eric Auger <eric.auger@linaro.org>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-07-18 18:10:31 +01:00
David Hildenbrand 9acc317b18 KVM: s390: let ptff intercepts result in cc=3
We don't emulate ptff subfunctions, therefore react on any attempt of
execution by setting cc=3 (Requested function not available).

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-07-18 14:15:00 +02:00
David Hildenbrand 6502a34cfd KVM: s390: allow user space to handle instr 0x0000
We will use illegal instruction 0x0000 for handling 2 byte sw breakpoints
from user space. As it can be enabled dynamically via a capability,
let's move setting of ICTL_OPEREXC to the post creation step, so we avoid
any races when enabling that capability just while adding new cpus.

Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-07-18 14:15:00 +02:00
Hans de Goede de427ad223 ARM: dts: sun8i: Add dts file for inet86dz board
The inet86dz board is a board used in 7" tablets from various oems.

These tablets are a23 based 7" tablets featuring a 1024x600 LCD,
512MB RAM, 4G NAND, rtl8188etv usb wifi, gsl1680 touchschreen,
micro-sd slot, 3.5mm headphone jack and a micro-usb otg connector
which doubles as charging port.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:51 +02:00
Hans de Goede 3e48bb211c ARM: dts: sun8i: Add dts file for Polaroid MID2407PXE03 tablet
The Polaroid MID2407PXE03 is an a23 based 7" tablet based on a M86_MB V2.0
PCB, featuring a 800x480 LCD, 512MB RAM, 4G NAND, esp8089 wifi, gsl1680
touchschreen, micro-sd slot, 3.5mm headphone jack and a micro-usb otg
connector which doubles as charging port.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:50 +02:00
Hans de Goede 8bb55cf157 ARM: dts: sun8i: Use sun8i-reference-design-tablet for ga10h dts
This results in quite a nice cleanup for this dts file.

As an added bonus this also enables backlight, regulator and full otg
support. I've tested that all these works as advertised.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:50 +02:00
Hans de Goede a0e4eb4b81 ARM: dts: sun8i: Use sun8i-reference-design-tablet for polaroid mid2809pxe04
This results in quite a nice cleanup for this dts file.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:49 +02:00
Hans de Goede 672244fa72 ARM: dts: sun8i: reference-design-tablet: Add drivevbus-supply
Add a drivevbus-supply property so that the drivevbus regulator
reports the right voltage value.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:48 +02:00
Hans de Goede edbc6f1f1d ARM: dts: Copy sun8i-q8-common.dtsi sun8i-reference-design-tablet.dtsi
Copy sun8i-q8-common.dtsi to sun8i-reference-design-tablet.dtsi. This
is part of renaming all the sun?i-q8-common.dtsi files to
sun?i-reference-design-tablet.dtsi since most of the hw-config in there
is shared by all sunxi tablets.

Note that in this case we keep sun5i-q8-common.dtsi as it is shared
between a23 / a33 q8 tablets. Also we leave the usb-wifi config in
there (rather then in sun8i-reference-design-tablet.dtsi) as most
sun8i tablets use sdio wifi rather then usb wifi.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:48 +02:00
Hans de Goede 147c6163da ARM: dts: sun5i: Use sun5i-reference-design-tablet.dtsi for utoo p66 dts
This results in a nice cleanup for this dts file.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:47 +02:00
Hans de Goede f51203b253 ARM: dts: sun5i: Use sun5i-reference-design-tablet.dtsi for dit4350 dts
This results in quite a nice cleanup for this dts file.

Note as a side-effect this also enables the on board speaker / headphones
out. I've tested that this works as advertised.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:47 +02:00
Hans de Goede 86ee097432 ARM: dts: sun5i: reference-design-tablet: Remove mention of q8
Remove all mention of q8 from sun5i-reference-design-tablet.dtsi.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:47 +02:00
Hans de Goede 83c9942688 ARM: dts: sun5i: reference-design-tablet: Set lradc vref to avcc
Set lradc vref to the actual avcc ldo, rather then to the fixed 3v0
regulator from common-regulators.dtsi.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:46 +02:00
Hans de Goede 875be91de1 ARM: dts: sun5i: Rename sun5i-q8-common.dtsi sun5i-reference-design-tablet.dtsi
Rename sun5i-q8-common.dtsi to sun5i-reference-design-tablet.dtsi. This
is part of renaming all the sun?i-q8-common.dtsi files to
sun?i-reference-design-tablet.dtsi since most of the hw-config in there
is shared by all sunxi tablets.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:45 +02:00
Hans de Goede f4a51e0ff7 ARM: dts: sun5i: Move q8 display bits to sun5i-a13-q8-tablet.dts
This is a preparation patch for renaming sun5i-q8-common.dtsi to
sun5i-reference-design-tablet.dtsi and sharing it between all
the A13 tablet dts files.

Since we only have a panel config for the 18 tablets (for now) move
this to the q8 specific dts file.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:45 +02:00
Hans de Goede 110af36aa0 ARM: dts: sunxi: Rename sunxi-q8-common.dtsi sunxi-reference-design-tablet.dtsi
Rename sunxi-q8-common.dtsi to sunxi-reference-design-tablet.dtsi. This
is part of renaming all the sun?i-q8-common.dtsi files to
sun?i-reference-design-tablet.dtsi since most of the hw-config in there
is shared by all sunxi tablets.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-07-18 11:39:44 +02:00
Markus Elfring 64a40c8400 s390/pci: Delete an unnecessary check before the function call "pci_dev_put"
The pci_dev_put() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-07-18 10:17:24 +02:00
Dan Carpenter 61282affd2 s390/smp: clean up a condition
I can never remember precedence rules.  Let's add some parenthesis so
this code is more clear.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-07-18 10:17:23 +02:00
Matthew McClintock f0d9d0f4b4 watchdog: qcom: add option for standalone watchdog not in timer block
Commit 0dfd582e02 ("watchdog: qcom: use timer devicetree
binding") moved to use the watchdog as a subset timer
register block. Some devices have the watchdog completely
standalone with slightly different register offsets as
well so let's account for the differences here.

The existing "kpss-standalone" compatible string doesn't
make it entirely clear exactly what the device is so
rename to "kpss-wdt" to reflect watchdog timer
functionality. Also update ipq4019 DTS with an SoC
specific compatible.

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Thomas Pedersen <twp@codeaurora.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2016-07-17 21:03:08 +02:00
Matthew McClintock 6e062696d7 watchdog: qcom: update device tree bindings
Update the compatible string to align with driver and also
add SoC specific string to DTS.

CC: linux-watchdog@vger.kernel.org
Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Thomas Pedersen <twp@codeaurora.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2016-07-17 21:03:00 +02:00
Aneesh Kumar K.V b275bfb269 powerpc/mm/radix: Add a kernel command line to disable radix
This patch adds the kernel command line disable_radix which disable
the radix MMU mode even if firmware indicates radix support via
ibm,pa-features device tree node.

This helps in testing different MMU mode easily.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:55 +10:00
Aneesh Kumar K.V 912cc87a65 powerpc/mm/radix: Add LPID based tlb flush helpers
We add a tlb flush variant, to flush LPID mappings.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:55 +10:00
Aneesh Kumar K.V 83209bc861 powerpc/mm/radix: Update machine call back to support new HCALL.
This update the machine dep callback such that we can use the same
callback to register process table. The interface is updated such that
we can easily call H_REGISTER_PROC_TBL hcall. The HCALL itself is
introduced in a later patch.

No functionality change introduced by this patch.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:54 +10:00
Aneesh Kumar K.V 09cf5bcb0c powerpc/mm/radix: Update PID switch sequence
Update the PID switch as per ISA doc. slbia is needed in radix to
invalidate any implementation specific lookaside information.
We use the .long format due to build errors with the below compiler
version.

gcc (Ubuntu 5.3.1-14ubuntu2.1) 5.3.1 20160413
GNU assembler (GNU Binutils for Ubuntu) 2.26

CC      arch/powerpc/mm//mmu_context_book3s64.o
{standard input}: Assembler messages:
{standard input}:506: Error: junk at end of line: `0x7'
scripts/Makefile.build:291: recipe for target 'arch/powerpc/mm//mmu_context_book3s64.o' failed
make[1]: *** [arch/powerpc/mm//mmu_context_book3s64.o] Error 1
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:53 +10:00
Aneesh Kumar K.V 4b7a350480 powerpc/mm/hash: Update SDR1 size encoding as documented in ISA 3.0
ISA 3.0 document hash table size in bytes = 2^(HTABSIZE + 18)

No functionality change by this patch.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:53 +10:00
Aneesh Kumar K.V 56547411a0 powerpc/mm: Print formation regarding the the MMU mode
This helps in easily identifying the MMU mode with which the kernel
is operating.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:52 +10:00
Aneesh Kumar K.V accfad7d0a powerpc/mm: Clear top 16 bits of va only on older cpus
As per ISA, we need to do this only for architecture version 2.02 and
earlier. This continued to work even for 2.07. But let's not do this for
anything after 2.02. ISA 3.0 requires these top bits to be not cleared.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:52 +10:00
Aneesh Kumar K.V e21fc93b70 powerpc/mm: Compile out radix related functions if RADIX_MMU is disabled
Currently we depend on mmu_has_feature to evalute to zero based on
MMU_FTRS_POSSIBLE mask. In a later patch, we want to update
radix_enabled() to runtime update the conditional operation to a jump
instruction. This implies we cannot depend on MMU_FTRS_POSSIBLE mask.
Instead define radix_enabled to return 0 if RADIX_MMU is not enabled.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:51 +10:00
Aneesh Kumar K.V 66c570f545 powerpc/mm: use _raw variant of page table accessors
This switch few of the page table accessor to use the __raw variant
and does the cpu to big endian conversion of constants. This helps in
generating better code.

For ex: a pgd_none(pgd) check with and without fix is listed below

Without fix:
------------
   2240:	20 00 61 eb 	ld      r27,32(r1)
/* PGD level */
typedef struct { __be64 pgd; } pgd_t;
static inline unsigned long pgd_val(pgd_t x)
{
	return be64_to_cpu(x.pgd);

    2244:	22 00 66 78 	rldicl  r6,r3,32,32
    2248:	3e 40 7d 54 	rotlwi  r29,r3,8
    224c:	0e c0 7d 50 	rlwimi  r29,r3,24,0,7
    2250:	3e 40 c5 54 	rotlwi  r5,r6,8
    2254:	2e c4 7d 50 	rlwimi  r29,r3,24,16,23
    2258:	0e c0 c5 50 	rlwimi  r5,r6,24,0,7
    225c:	2e c4 c5 50 	rlwimi  r5,r6,24,16,23
    2260:	c6 07 bd 7b 	rldicr  r29,r29,32,31
    2264:	78 2b bd 7f 	or      r29,r29,r5
		if (pgd_none(pgd))
    2268:	00 00 bd 2f 	cmpdi   cr7,r29,0
    226c:	54 03 9e 41 	beq     cr7,25c0 <__get_user_pages_fast+0x500>

With fix:
---------
    2370:	20 00 61 eb 	ld      r27,32(r1)
		if (pgd_none(pgd))
    2374:	00 00 bd 2f 	cmpdi   cr7,r29,0
    2378:	a8 03 9e 41 	beq     cr7,2720 <__get_user_pages_fast+0x530>
			break;
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:51 +10:00
Aneesh Kumar K.V bf16cdf48a powerpc/mm/radix: Update LPCR HR bit as per ISA
PowerISA 3.0 requires the MMU mode (radix vs. hash) of the hypervisor
to be mirrored in the LPCR register, in addition to the partition table.
This is done to avoid fetching from the table when deciding, among other
things, how to perform transitions to HV mode on some interrupts.
So let's set it up appropriately

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:50 +10:00
Balbir Singh 8cd6d3c23e powerpc/mm: Fix .long's in tlb-radix.c to more meaningful
The .longs with the shifts are harder to read, use more meaningful names
for the opcodes. PPC_TLBIE_5 is introduced for the 5 opcode variation of
the instruction due to an existing op-code for the 2 opcode variant.

Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:50 +10:00
Benjamin Herrenschmidt 9a1a70ae15 powerpc/pci: Don't try to allocate resources that will be reassigned
When we know we will reassign all resources, trying (and failing)
to allocate them initially is fairly pointless and leads to a lot
of scary messages in the kernel log

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:49 +10:00
Benjamin Herrenschmidt 08a45b320a powerpc/powernv/pci: Check status of a PHB before using it
If the firmware encounters an error (internal or HW) during initialization
of a PHB, it might leave the device-node in the tree but mark it disabled
using the "status" property. We should check it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:49 +10:00
Benjamin Herrenschmidt a1339faf72 powerpc/powernv/pci: Use the device-tree to get available range of M64's
M64's are the configurable 64-bit windows that cover the 64-bit MMIO
space. We used to hard code 16 windows. Newer chips might have a
variable number and might need to reserve some as well (for example
on PHB4/POWER9, M32 and M64 are actually unified and we use M64#0
to map the 32-bit space).

So newer OPALs will provide a property we can use to know what range
of windows is available. The property is named so that it can
eventually support multiple ranges but we only use the first one for
now.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:48 +10:00
Benjamin Herrenschmidt f0228c4130 powerpc/powernv/pci: Fallback to OPAL for TCE invalidations
If we don't find registers for the PHB or don't know the model
specific invalidation method, use OPAL calls instead.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:48 +10:00
Benjamin Herrenschmidt fd141d1a99 powerpc/powernv/pci: Rework accessing the TCE invalidate register
It's architected, always in a known place, so there is no need
to keep a separate pointer to it, we use the existing "regs",
and we complement it with a real mode variant.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

# Conflicts:
#	arch/powerpc/platforms/powernv/pci-ioda.c
#	arch/powerpc/platforms/powernv/pci.h
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:47 +10:00
Benjamin Herrenschmidt 08acce1cab powerpc/powernv/pci: Remove SWINV constants and obsolete TCE code
We have some obsolete code in pnv_pci_p7ioc_tce_invalidate()
to handle some internal lab tools that have stopped being
useful a long time ago. Remove that along with the definition
and test for the TCE_PCI_SWINV_* flags whose value is basically
always the same.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:47 +10:00
Benjamin Herrenschmidt a34ab7c328 powerpc/powernv/pci: Rename TCE invalidation calls
The TCE invalidation functions are fairly implementation specific,
and while the IODA specs more/less describe the register, in practice
various implementation workarounds may be required. So name the
functions after the target PHB.

Note today and for the foreseeable future, there's a 1:1 relationship
between an IODA version and a PHB implementation. There exist another
variant of IODA1 (Torrent) but we never supported in with OPAL and
never will.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:46 +10:00
Benjamin Herrenschmidt 69c592ed40 powerpc/opal: Add real mode call wrappers
Replace the old generic opal_call_realmode() with proper per-call
wrappers similar to the normal ones and convert callers.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:46 +10:00
Benjamin Herrenschmidt b7d6bf4fdd powerpc/pseries/pci: Remove obsolete SW invalidate
That was used by some old IBM internal bringup tools and is
no longer relevant.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:45 +10:00
Benjamin Herrenschmidt fb111334e4 powerpc/powernv: Discover IODA3 PHBs
We instanciate them as IODA2. We also change the MSI EOI hack
to only kick on PHB3 since it will not be needed on any new
implementation.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:45 +10:00
Benjamin Herrenschmidt d74361881f powerpc/xics: Add ICP OPAL backend
This adds a new XICS backend that uses OPAL calls, which can be
used when we don't have native support for the platform interrupt
controller.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:45 +10:00
Benjamin Herrenschmidt 1d607bb3bd powerpc/irq: Add mechanism to force a replay of interrupts
Calling this function with interrupts soft-disabled will cause
a replay of the external interrupt vector when they are re-enabled.

This will be used by the OPAL XICS backend (and latter by the native
XIVE code) to handle EOI signaling that there are more interrupts to
fetch from the hardware since the hardware won't issue another HW
interrupt in that case.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:44 +10:00
Benjamin Herrenschmidt 9baaef0a22 powerpc/irq: Add support for HV virtualization interrupts
This will be delivering external interrupts from the XIVE to the
Hypervisor. We treat it as a normal external interrupt for the
lazy irq disable code (so it will be replayed as a 0x500) and
route it to do_IRQ.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:44 +10:00
Benjamin Herrenschmidt b88d4bce2b powerpc/book64s: Move a few exception common handlers to make room
This moves the CBE RAS and facility unavailable "common" handlers
down to after the FWNMI page.

This frees up some space in the very demanded spaces before the
relocation-on vectors and before the FWNMI page. They are still
within 64K of __start, so CONFIG_RELOCATABLE should still work.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-17 16:42:34 +10:00
Paul Gortmaker 00677f826b x86/platform: Delete extraneous MODULE_* tags fromm ts5500
This file doesn't do anything modular and hence while the tristate
Kconfig used for the gpio portion is fine, it recently got swept up in
an audit of files using the module.h header but not using any modular
registration functions.

However it is not compiled in any of the normal build coverage, and
so some remaining extraneous MODULE macro use were not found until a
randconfig from the kbuild robot came across it.

Here we remove the remaining no-op MODULE macros from the built in
portion of code relating to this Kconfig option.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Savoir-faire Linux Inc. <kernel@savoirfairelinux.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kbuild-all@01.org
Cc: linux-kernel@vger.kernel.org
Fixes: cc3ae7b0af ("x86/platform: Audit and remove any unnecessary uses of module.h")
Link: http://lkml.kernel.org/r/20160715235318.GD10758@windriver.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-16 22:41:00 +02:00
Cao, Lei b244c9fc25 KVM: VMX: handle PML full VMEXIT that occurs during event delivery
With PML enabled, guest will shut down if a PML full VMEXIT occurs during
event delivery. According to Intel SDM 27.2.3, PML full VMEXIT can occur when
event is being delivered through IDT, so KVM should not exit to user space
with error. Instead, it should let EXIT_REASON_PML_FULL go through and the
event will be re-injected on the next VMENTRY.

Signed-off-by: Lei Cao <lei.cao@stratus.com>
Cc: stable@vger.kernel.org
Fixes: 843e433057 ("KVM: VMX: Add PML support in VMX")
[Shortened the summary and Cc'd stable.]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2016-07-16 15:27:40 +02:00
Radim Krčmář 6a907cd0ad Revert "KVM: SVM: fix trashing of MSR_TSC_AUX"
This reverts commit 9770404a00.

The reverted patch is not needed as only userspace uses RDTSCP and
MSR_TSC_AUX is in host_save_user_msrs[] and therefore properly saved in
svm_vcpu_load() and restored in svm_vcpu_put() before every switch to
userspace.

The reverted patch did not allow the kernel to use RDTSCP in the future,
because of missed trashing in svm_set_msr() and 64-bit ifdef.

This reverts commit 2b23c3a6e3.

2b23c3a6e3 ("KVM: SVM: do not set MSR_TSC_AUX on 32-bit builds") is a
build fix for 9770404a00 and reverting them separately would only
break more bisections.

Cc: stable@vger.kernel.org
2016-07-16 15:26:54 +02:00
Daniel Borkmann 7e3f977edd perf, events: add non-linear data support for raw records
This patch adds support for non-linear data on raw records. It
extends raw records to have one or multiple fragments that will
be written linearly into the ring slot, where each fragment can
optionally have a custom callback handler to walk and extract
complex, possibly non-linear data.

If a callback handler is provided for a fragment, then the new
__output_custom() will be used instead of __output_copy() for
the perf_output_sample() part. perf_prepare_sample() does all
the size calculation only once, so perf_output_sample() doesn't
need to redo the same work anymore, meaning real_size and padding
will be cached in the raw record. The raw record becomes 32 bytes
in size without holes; to not increase it further and to avoid
doing unnecessary recalculations in fast-path, we can reuse
next pointer of the last fragment, idea here is borrowed from
ZERO_OR_NULL_PTR(), which should keep the perf_output_sample()
path for PERF_SAMPLE_RAW minimal.

This facility is needed for BPF's event output helper as a first
user that will, in a follow-up, add an additional perf_raw_frag
to its perf_raw_record in order to be able to more efficiently
dump skb context after a linear head meta data related to it.
skbs can be non-linear and thus need a custom output function to
dump buffers. Currently, the skb data needs to be copied twice;
with the help of __output_custom() this work only needs to be
done once. Future users could be things like XDP/BPF programs
that work on different context though and would thus also have
a different callback function.

The few users of raw records are adapted to initialize their frag
data from the raw record itself, no change in behavior for them.
The code is based upon a PoC diff provided by Peter Zijlstra [1].

  [1] http://thread.gmane.org/gmane.linux.network/421294

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-15 14:23:56 -07:00
Arnd Bergmann cd06b2a573 DT Changes for 4.8 #3:
- Lot of fixes for dtc warnings
  - Separate dtb compilation for ARMv4 and ARMv5
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Merge tag 'at91-ab-4.8-dt3' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux into next/dt

Merge "DT Changes for 4.8 #3" from Alexandre Belloni:
 - Lot of fixes for dtc warnings
 - Separate dtb compilation for ARMv4 and ARMv5

* tag 'at91-ab-4.8-dt3' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  ARM: dts: at91: Don't build unnecessary dtbs
  ARM: dts: at91: sama5d3x: separate motherboard gmac and emac definitions
  ARM: dts: at91: at91sam9g25ek: fix isi endpoint node
  ARM: dts: at91: move isi definition to at91sam9g25ek
  ARM: dts: at91: fix i2c-gpio node name
  ARM: dts: at91: vinco: fix regulator name
  ARM: dts: at91: ariag25 : fix onewire node
  ARM: dts: at91: sama5d4_ma5d4evk: fix regulator names
  ARM: dts: at91: sama5d4_ma5d4: fix regulator names
  ARM: dts: at91: sama5d4_xplained: fix regulator names
  ARM: dts: at91: sama5d3_xplained: fix regulator name
  ARM: dts: at91: sama5d4ek: remove useless lcd_bus
  ARM: dts: at91: Fix USB endpoint nodes
  Documentation: dt: usb: atmel-usb: add unit-address
  ARM: dts: at91: Fix ADC trigger nodes
  Documentation: dt: iio: at91_adc: fix trigger node names
2016-07-15 23:00:19 +02:00
Rafael J. Wysocki 406f992e4a x86 / hibernate: Use hlt_play_dead() when resuming from hibernation
On Intel hardware, native_play_dead() uses mwait_play_dead() by
default and only falls back to the other methods if that fails.
That also happens during resume from hibernation, when the restore
(boot) kernel runs disable_nonboot_cpus() to take all of the CPUs
except for the boot one offline.

However, that is problematic, because the address passed to
__monitor() in mwait_play_dead() is likely to be written to in the
last phase of hibernate image restoration and that causes the "dead"
CPU to start executing instructions again.  Unfortunately, the page
containing the address in that CPU's instruction pointer may not be
valid any more at that point.

First, that page may have been overwritten with image kernel memory
contents already, so the instructions the CPU attempts to execute may
simply be invalid.  Second, the page tables previously used by that
CPU may have been overwritten by image kernel memory contents, so the
address in its instruction pointer is impossible to resolve then.

A report from Varun Koyyalagunta and investigation carried out by
Chen Yu show that the latter sometimes happens in practice.

To prevent it from happening, temporarily change the smp_ops.play_dead
pointer during resume from hibernation so that it points to a special
"play dead" routine which uses hlt_play_dead() and avoids the
inadvertent "revivals" of "dead" CPUs this way.

A slightly unpleasant consequence of this change is that if the
system is hibernated with one or more CPUs offline, it will generally
draw more power after resume than it did before hibernation, because
the physical state entered by CPUs via hlt_play_dead() is higher-power
than the mwait_play_dead() one in the majority of cases.  It is
possible to work around this, but it is unclear how much of a problem
that's going to be in practice, so the workaround will be implemented
later if it turns out to be necessary.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=106371
Reported-by: Varun Koyyalagunta <cpudebug@centtech.com>
Original-by: Chen Yu <yu.c.chen@intel.com>
Tested-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 22:42:48 +02:00
Arnd Bergmann 7e03e116e7 arm64: remove duplicate PWM entry in defconfig
We merged two patches that both enabled CONFIG_PWM, leading to a harmless
warning:

arch/arm64/configs/defconfig:352:warning: override: reassigning to symbol PWM

This removes one of the two identical lines to avoid the warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2016-07-15 22:33:40 +02:00
Benjamin Herrenschmidt 9fedd3f880 powerpc/powernv: Add XICS emulation APIs
OPAL provides an emulated XICS interrupt controller to
use as a fallback on newer processors that don't have a
XICS. It's meant as a way to provide backward compatibility
with future processors. Add the corresponding interfaces.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:43 +10:00
Shreyas B. Prabhu c0691f9dd2 powerpc/powernv: Use deepest stop state when cpu is offlined
If hardware supports stop state, use the deepest stop state when
the cpu is offlined.

Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:42 +10:00
Shreyas B. Prabhu bcef83a00d powerpc/powernv: Add platform support for stop instruction
POWER ISA v3 defines a new idle processor core mechanism. In summary,
 a) new instruction named stop is added. This instruction replaces
	instructions like nap, sleep, rvwinkle.
 b) new per thread SPR named Processor Stop Status and Control Register
	(PSSCR) is added which controls the behavior of stop instruction.

PSSCR layout:
----------------------------------------------------------
| PLS | /// | SD | ESL | EC | PSLL | /// | TR | MTL | RL |
----------------------------------------------------------
0      4     41   42    43   44     48    54   56    60

PSSCR key fields:
	Bits 0:3  - Power-Saving Level Status. This field indicates the lowest
	power-saving state the thread entered since stop instruction was last
	executed.

	Bit 42 - Enable State Loss
	0 - No state is lost irrespective of other fields
	1 - Allows state loss

	Bits 44:47 - Power-Saving Level Limit
	This limits the power-saving level that can be entered into.

	Bits 60:63 - Requested Level
	Used to specify which power-saving level must be entered on executing
	stop instruction

This patch adds support for stop instruction and PSSCR handling.

Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:41 +10:00
Shreyas B. Prabhu 0dfffb48ce powerpc/powernv: abstraction for saving SPRs before entering deep idle states
Create a function for saving SPRs before entering deep idle states.
This function can be reused for POWER9 deep idle states.

Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:40 +10:00
Shreyas B. Prabhu 4eae2c9ae5 powerpc/powernv: Make pnv_powersave_common more generic
pnv_powersave_common does common steps needed before entering idle
state and eventually changes MSR to MSR_IDLE and does rfid to
pnv_enter_arch207_idle_mode.

Move the updation of HSTATE_HWTHREAD_STATE to pnv_powersave_common
from pnv_enter_arch207_idle_mode and make it more generic by passing the
rfid address as a function parameter.

Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:40 +10:00
Shreyas B. Prabhu 5fa6b6bd7a powerpc/powernv: Rename reusable idle functions to hardware agnostic names
Functions like power7_wakeup_loss, power7_wakeup_noloss,
power7_wakeup_tb_loss are used by POWER7 and POWER8 hardware. They can
also be used by POWER9. Hence rename these functions hardware agnostic
names.

Suggested-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:39 +10:00
Shreyas B. Prabhu 83289f909a powerpc/powernv: Rename idle_power7.S to idle_book3s.S
idle_power7.S handles idle entry/exit for POWER7, POWER8 and in next
patch for POWER9. Rename the file to a non-hardware specific
name.

Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:39 +10:00
Shreyas B. Prabhu 1706567117 powerpc/kvm: make hypervisor state restore a function
In the current code, when the thread wakes up in reset vector, some
of the state restore code and check for whether a thread needs to
branch to kvm is duplicated. Reorder the code such that this
duplication is avoided.

At a higher level this is what the change looks like-

Before this patch -
power7_wakeup_tb_loss:
	restore hypervisor state
	if (thread needed by kvm)
		goto kvm_start_guest
	restore nvgprs, cr, pc
	rfid to process context

power7_wakeup_loss:
	restore nvgprs, cr, pc
	rfid to process context

reset vector:
	if (waking from deep idle states)
		goto power7_wakeup_tb_loss
	else
		if (thread needed by kvm)
			goto kvm_start_guest
		goto power7_wakeup_loss

After this patch -
power7_wakeup_tb_loss:
	restore hypervisor state
	return

power7_restore_hyp_resource():
	if (waking from deep idle states)
		goto power7_wakeup_tb_loss
	return

power7_wakeup_loss:
	restore nvgprs, cr, pc
	rfid to process context

reset vector:
	power7_restore_hyp_resource()
	if (thread needed by kvm)
                goto kvm_start_guest
	goto power7_wakeup_loss

Reviewed-by: Paul Mackerras <paulus@samba.org>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:38 +10:00
Shreyas B. Prabhu bfd1b7ae5e powerpc/powernv: Use PNV_THREAD_WINKLE macro while requesting for winkle
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:38 +10:00
Stewart Smith ec5619fdba powerpc/lib: Clarify that adde is an instruction and we mean plural
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:37 +10:00
Nathan Fontenot fdb4f6e99f powerpc/pseries: Remove call to memblock_add()
The call to memblock_add is not needed, this is already done by
memory_add(). This patch removes this call which shrinks
dlpar_add_lmb_memory() enough that it can be merged into dlpar_add_lmb().

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:37 +10:00
Nathan Fontenot ec99907244 powerpc/pseries: Auto-online hotplugged memory
A recent update (commit id 31bc3858ea) allows for automatically
onlining memory that is added. This patch sets the config option
CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE=y for pseries and updates the
pseries memory hotplug code so that DLPAR added memory can be
automatically onlined instead of explicitly onlining the memory.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:37 +10:00
Nathan Fontenot c05a5a4096 powerpc/pseries: Dynamic add entires to associativity lookup array
Dynamically add entries to the associativity lookup array

The ibm,associativity-lookup-arrays property may only contain
associativity arrays for LMBs present at boot time. When hotplug
adding a LMB its associativity array may not be in the associativity
lookup array, this patch adds the ability to add new entries to the
associativity lookup array.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-15 20:18:26 +10:00
Arnd Bergmann 7aff0f29cd ARM: dts: at91: Don't build unnecessary dtbs
Building both ARMv4 and ARMv5 dtbs when SOC_SAM_V4_V5 is an issue for
kernelci because it will then attempt to boot ARMv4 kernels on at91sam9
which doesn't work.

Use CONFIG_SOC_AT91RM9200 and CONFIG_SOC_AT91SAM9 instead.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-15 11:23:59 +02:00
Alexandre Belloni 94197ad713 ARM: dts: at91: sama5d3x: separate motherboard gmac and emac definitions
Separate the definitions for the emac and the gmac in different files and
include them in the final board dts that uses them.

Solves:
Warning (unit_address_vs_reg): Node /ahb/apb/ethernet@f0028000 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /ahb/apb/ethernet@f802c000 has a unit name, but no reg property

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-15 11:23:46 +02:00
Alexandre Belloni 81c940d9be ARM: dts: at91: at91sam9g25ek: fix isi endpoint node
Add a reg property in the endpoint node as documented in
Documentation/devicetree/bindings/media/video-interfaces.txt

Solves:
Warning (unit_address_vs_reg): Node /ahb/apb/isi@f8048000/port/endpoint@0 has a unit name, but no reg property

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-15 11:23:45 +02:00
Alexandre Belloni efedc4893b ARM: dts: at91: move isi definition to at91sam9g25ek
The ISI is only present on the at91sam9g25, move the definition to the
at91sam9g25ek board dts to avoid warnings.

Solves the following warning for other 9x5ek boards:
Warning (unit_address_vs_reg): Node /ahb/apb/isi@f8048000 has a unit name, but no reg property

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-15 11:23:45 +02:00
Alexandre Belloni e152e3f7f4 ARM: dts: at91: fix i2c-gpio node name
i2c-gpio doesn't need a reg property. Change the node names to i2c-gpio-x
as used in other dts to remove the unit-address.

Solves:
Warning (unit_address_vs_reg): Node /i2c@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /i2c@1 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /i2c@2 has a unit name, but no reg property

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-15 11:23:44 +02:00
Joe Perches fb2bb461e2 metag: Remove duplicate KERN_<LEVEL> prefix
Use a bare printk to avoid a duplicate KERN_<LEVEL> in logging output.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
2016-07-15 09:55:49 +01:00
Andrea Gelmini 986724dd35 metag: Fix typos
Fix typos in metag architecture.

[james.hogan@imgtec.com: squashed patches and fixed "detailed"]

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
2016-07-15 09:55:49 +01:00
Anna-Maria Gleixner ecd8081f6f ARC/time: Convert to hotplug state machine
Install the callbacks via the state machine.

Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: linux-snps-arc@lists.infradead.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153338.391826254@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:41:46 +02:00
Sebastian Andrzej Siewior 6b2c28471d x86/x2apic: Convert to CPU hotplug state machine
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Len Brown <len.brown@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathias Krause <minipli@googlemail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153337.736898691@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:41:42 +02:00
Richard Cochran ae6a8a2ed7 x86/tboot: Convert to hotplug state machine
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.

Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Gang Wei <gang.wei@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ning Sun <ning.sun@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard L Maliszewski <richard.l.maliszewski@intel.com>
Cc: Shane Wang <shane.wang@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: rt@linutronix.de
Cc: tboot-devel@lists.sourceforge.net
Link: http://lkml.kernel.org/r/20160713153337.400227322@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:40:30 +02:00
Sebastian Andrzej Siewior 27c01a8c73 arm64/armv8 deprecated: Convert to hotplug state machine
Install the callbacks via the state machine.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Jisheng Zhang <jszhang@marvell.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Shengjiu Wang <shengjiu.wang@freescale.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153337.311115906@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:40:30 +02:00
Richard Cochran 65264e3bc3 MIPS/Loongson-3: Convert oprofile to hotplug state machine
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.

Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <rric@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: oprofile-list@lists.sf.net
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153337.054827168@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:40:29 +02:00
Richard Cochran 4761adb6f4 arm/xen: Convert to hotplug state machine
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.

The get_cpu() in xen_starting_cpu() boils down to preempt_disable() since
we already know the CPU we run on. Disabling preemption shouldn't be required
here from what I see since it we don't switch CPUs while invoking the function.

Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: rt@linutronix.de
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/20160713153336.971559670@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:40:28 +02:00
Richard Cochran 26b8768868 arm/twd: Convert to hotplug state machine
Install the callbacks via the state machine. The callbacks won't be invoked on
already online CPUs.

Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Eric Anholt <eric@anholt.net>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153336.881124821@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:40:28 +02:00
Richard Cochran 9eeb226477 arm/l2c: Convert to hotplug state machine
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.

Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Brad Mouring <brad.mouring@ni.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153336.801270887@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:40:28 +02:00
Richard Cochran 04d045a681 metag/perf: Convert to hotplug state machine
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.

Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-metag@vger.kernel.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153336.717395164@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:40:27 +02:00
Thomas Gleixner e5b61bafe7 arm: Convert VFP hotplug notifiers to state machine
Straight forward conversion plus commentary why code which is executed
in hotplug callbacks needs to be invoked before installing them.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153335.713612993@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:40:22 +02:00
Sebastian Andrzej Siewior 148b9e2abe x86/apb_timer: Convert to hotplug state machine
Install the callbacks via the state machine. There is no setup just one
teardown callback. Remove the silly comment about the workqueue up dependency.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153335.625342983@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:40:22 +02:00
Sebastian Andrzej Siewior 251a5fd64b x86/kvm/kvmclock: Convert to hotplug state machine
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.

We assumed that the priority ordering was ment to invoke the online
callback as the last step. In the original code this also invoked the
down prepare callback as the last step. With the symmetric state
machine the down prepare callback is now the first step.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Radim Krcmar <rkrcmar@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm@vger.kernel.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153335.542880859@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:40:21 +02:00
Anna-Maria Gleixner 162e52a117 KVM/x86: Remove superfluous SMP function call
Since the following commit:

  1cf4f629d9 ("cpu/hotplug: Move online calls to hotplugged cpu")

... the CPU_ONLINE and CPU_DOWN_PREPARE notifiers are always run on the hot
plugged CPU, and as of commit:

  3b9d6da67e ("cpu/hotplug: Fix rollback during error-out in __cpu_disable()")

the CPU_DOWN_FAILED notifier also runs on the hot plugged CPU.  This patch
converts the SMP functional calls into direct calls.

smp_function_call_single() executes the function with interrupts
disabled. This calling convention is not preserved because there
is no reason to do so.

Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Radim Krcmar <rkrcmar@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm@vger.kernel.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153335.452527104@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:40:21 +02:00
Wei Jiangang 102bb9fef6 x86/apic: Remove the unused struct apic::apic_id_mask field
The only user verify_local_APIC() had been removed by commit:

  4399c03c67 ("x86/apic: Remove verify_local_APIC()")

... so there is no need to keep it.

Signed-off-by: Wei Jiangang <weijg.fnst@cn.fujitsu.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: boris.ostrovsky@oracle.com
Cc: bsd@redhat.com
Cc: david.vrabel@citrix.com
Cc: jgross@suse.com
Cc: konrad.wilk@oracle.com
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/1468463046-20849-1-git-send-email-weijg.fnst@cn.fujitsu.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:39:05 +02:00
Ingo Molnar 07ccdcd34a Merge branch 'linus' into x86/apic, to refresh the branch
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:38:54 +02:00