Commit Graph

556 Commits

Author SHA1 Message Date
Johannes Weiner 759496ba64 arch: mm: pass userspace fault flag to generic fault handler
Unlike global OOM handling, memory cgroup code will invoke the OOM killer
in any OOM situation because it has no way of telling faults occuring in
kernel context - which could be handled more gracefully - from
user-triggered faults.

Pass a flag that identifies faults originating in user space from the
architecture-specific fault handlers to generic code so that memcg OOM
handling can be improved.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: azurIt <azurit@pobox.sk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-12 15:38:01 -07:00
Johannes Weiner 871341023c arch: mm: do not invoke OOM killer on kernel fault OOM
Kernel faults are expected to handle OOM conditions gracefully (gup,
uaccess etc.), so they should never invoke the OOM killer.  Reserve this
for faults triggered in user context when it is the only option.

Most architectures already do this, fix up the remaining few.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: azurIt <azurit@pobox.sk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-12 15:38:01 -07:00
Naoya Horiguchi 83467efbdb mm: migrate: check movability of hugepage in unmap_and_move_huge_page()
Currently hugepage migration works well only for pmd-based hugepages
(mainly due to lack of testing,) so we had better not enable migration of
other levels of hugepages until we are ready for it.

Some users of hugepage migration (mbind, move_pages, and migrate_pages) do
page table walk and check pud/pmd_huge() there, so they are safe.  But the
other users (softoffline and memory hotremove) don't do this, so without
this patch they can try to migrate unexpected types of hugepages.

To prevent this, we introduce hugepage_migration_support() as an
architecture dependent check of whether hugepage are implemented on a pmd
basis or not.  And on some architecture multiple sizes of hugepages are
available, so hugepage_migration_support() also checks hugepage size.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Rik van Riel <riel@redhat.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:57:49 -07:00
Linus Torvalds 31f7c3a688 Device tree core updates for v3.12
Generally minor changes. A bunch of bug fixes, particularly for
 initialization and some refactoring. Most notable change if feeding the
 entire flattened tree into the random pool at boot. May not be
 significant, but shouldn't hurt either.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJSL12LAAoJEEFnBt12D9kB64gP/RBipnYbo3RPanHg+lE/J1V7
 KSVFNGKWJHxTg47VVC1YJGIG21jqxAilpdS2MQL5FP7iyd+IzvtHpQiJgp+2G+pq
 di06yrdyrYErxRgZgGQi8IpR538ZzOEVLCKJGdb09YelkRzPT5au7CC1MAsX3qco
 yba7PHk0/Nc4hZE4aGbgR1DlRmn86ob7mM0KFE/LORaSN2BueMgWcwKhQXYNGyoh
 assX4yNhAbUG6Bgw7paBLDGqHh8c5Ei5AppU8yPb+N094jgYHBJryUoDlzzUHD23
 qqiEqHhUKT0TpgHNs8KH0WZFugcmjKvYEbzdzadBxqfXnJN4fKSEcdfF3iz4T14j
 U6EZks89GoHwA523OghUZkKNOqlsUdWfdKz+8/grQqKisYwDcf3fCxEYk/4weDCQ
 b6fFlOv6+AI3btjXp6F511ZKxyT4ZZzkHjp/ZSrhBygyamNZfax0ma0j+ZS9AZql
 kPxQS0nOve6NKaP7vXxMmW5sGMnL19ER/Hm31wthGcWI43GVebUdklnzfGaEeSjs
 pmP8oiCNemceqVpiPKxcOxiguf/eyIjP1SFXbguASygUmQeTDbbJ8n1FYznCitue
 xJgWttKWsEf/aMR3eJtQ3aBmHR3rijAV4E28Wlq8XMkocwvpQm2zMocS2Z5BJ80S
 hi1kQVy8+RxNX96tOSp1
 =GSWl
 -----END PGP SIGNATURE-----

Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux

Pull device tree core updates from Grant Likely:
 "Generally minor changes.  A bunch of bug fixes, particularly for
  initialization and some refactoring.  Most notable change if feeding
  the entire flattened tree into the random pool at boot.  May not be
  significant, but shouldn't hurt either"

Tim Bird questions whether the boot time cost of the random feeding may
be noticeable.  And "add_device_randomness()" is definitely not some
speed deamon of a function.

* tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux:
  of/platform: add error reporting to of_amba_device_create()
  irq/of: Fix comment typo for irq_of_parse_and_map
  of: Feed entire flattened device tree into the random pool
  of/fdt: Clean up casting in unflattening path
  of/fdt: Remove duplicate memory clearing on FDT unflattening
  gpio: implement gpio-ranges binding document fix
  of: call __of_parse_phandle_with_args from of_parse_phandle
  of: introduce of_parse_phandle_with_fixed_args
  of: move of_parse_phandle()
  of: move documentation of of_parse_phandle_with_args
  of: Fix missing memory initialization on FDT unflattening
  of: consolidate definition of early_init_dt_alloc_memory_arch()
  of: Make of_get_phy_mode() return int i.s.o. const int
  include: dt-binding: input: create a DT header defining key codes.
  of/platform: Staticize of_platform_device_create_pdata()
  of: Specify initrd location using 64-bit
  dt: Typo fix
  OF: make of_property_for_each_{u32|string}() use parameters if OF is not enabled
2013-09-10 13:53:52 -07:00
Linus Torvalds 576c25eb59 - User tagged pointers support (top 8-bit of user pointers automatically
ignored by the CPU).
 - Kernel mode NEON (no users for arm64 yet but work in progress).
 - arm64 kernel Image header extended to accommodate future EFI stub.
 - Remove BogoMIPS reporting (not relevant, it's just the timer
   frequency).
 - Clean-up (EM_AARCH64/EM_ARM to elf-em.h, ELF notes in read-only
   segment, unused variable).
 - Bug-fixes (RAM boundaries not 2MB aligned, perf, includes).
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJSKgPAAAoJEGvWsS0AyF7x4QgP/1Mgb1BwkRaDcIif45hp0ERh
 qg/9nAGb3XJWkmxNvqoZK2rDtY1mCJcIf/SvlcJLASV6DBfdSEoXNNEQs+n4zwg0
 ifStpq1u/Evf0TXeMeUSATgulHoIZswdXrn/exCBmJq3nlOB3Suee8gas0MCjm4Q
 JhcDiXjUpCE5yjKSS6BxXewB7BVSYMvhlWTDECRo27Uo4lyAzvak/aUfQHatS9Ho
 dpr9/yVl5eSsKJqdgMHfUr0LC6rEg0z6xJOHa8gACSOl4qTUCAI1wKtRYcQ0IQ+l
 7FBm6DYFcgT+ZjwnvQjGYvhvTHKo+qXq7WJLPJPHJLxeA9MmQoXYrroDo80Yv7K8
 7tciBbLHO24K0P6bDDtHesMXRIgWStMPhGWzLrLNPmleL2i9w85eSKt3lSMwAq+t
 SdzwJuWYL1iB9XFRom3Ls4NpcVK6RjJ+y/KnI0IIH+ytuDZNM/deXZ4WiUBjYoUm
 yCMA5vX7GgNHI7PDgLNRYzGBFNwZPPx6J6M2FsgGDFcyH5ZHMuod4WcNZU3IqxV9
 refehXBwC5xrXEbkxFBb3UB5Wf7ekVCh/roVnXBoEjdlSE3b+h9W8MCBUn9AbCgt
 WaFr+YaHMq3m2goMPlfLqOGC9tfXSFvNN9AssZIzJaS+zseW9Blf8irb9mFPkE8G
 PiGFtfUkxGR2gwKO7P2g
 =5w0G
 -----END PGP SIGNATURE-----

Merge tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull ARM64 update from Catalin Marinas:
 - User tagged pointers support (top 8-bit of user pointers
   automatically ignored by the CPU).
 - Kernel mode NEON (no users for arm64 yet but work in progress).
 - arm64 kernel Image header extended to accommodate future EFI stub.
 - Remove BogoMIPS reporting (not relevant, it's just the timer
   frequency).
 - Clean-up (EM_AARCH64/EM_ARM to elf-em.h, ELF notes in read-only
   segment, unused variable).
 - Bug-fixes (RAM boundaries not 2MB aligned, perf, includes).

* tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  Documentation/arm64: clarify requirements for DTB placement
  arm64: mm: permit use of tagged pointers at EL0
  Move the EM_ARM and EM_AARCH64 definitions to uapi/linux/elf-em.h
  arm64: Remove unused cpu_name ascii in arch/arm64/mm/proc.S
  arm64: delay: don't bother reporting bogomips in /proc/cpuinfo
  arm64: Fix mapping of memory banks not ending on a PMD_SIZE boundary
  arm64: move elf notes into readonly segment
  arm64: Enable interrupts in the EL0 undef handler
  arm64: Expand arm64 image header
  ARM64: include: asm: include "asm/types.h" in "pgtable-2level-types.h" and "pgtable-3level-types.h"
  arm64: add support for kernel mode NEON
  arm64: perf: fix ARMv8 EVTYPE_MASK to include NSH bit
  arm64: perf: fix group validation when using enable_on_exec
2013-09-06 11:09:44 -07:00
Linus Torvalds ac3c1c4f1c Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer changes from Ingo Molnar:
 "Various clocksource driver updates: extend the core with memory mapped
  hardware (mmio) support and add new (ARM) Moxart SoC and sun4i
  hardware support"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
  clocksource: arch_timer: Add support for memory mapped timers
  clocksource: arch_timer: Push the read/write wrappers deeper
  Documentation: Add memory mapped ARM architected timer binding
  clocksource: arch_timer: Pass clock event to set_mode callback
  clocksource: arch_timer: Make register accessors less error-prone
  ARM: clocksource: moxart: documentation: Update device tree bindings document
  ARM: clocksource: moxart: Add bitops.h include
  ARM: clocksource: moxart: documentation: Fix device tree bindings document
  ARM: clocksource: Add support for MOXA ART SoCs
  clocksource: cadence_ttc: Reuse clocksource as sched_clock
  clocksource: cadence_ttc: Remove unused header
  clocksource: sun4i: Fix bug when switching from periodic to oneshot modes
  clocksource: sun4i: Cleanup parent clock setup
  clocksource: sun4i: Remove TIMER_SCAL variable
  clocksource: sun4i: Factor out some timer code
  clocksource: sun4i: Fix the next event code
  clocksource: sun4i: Don't forget to enable the clock we use
  clocksource: sun4i: Add clocksource and sched clock drivers
  clocksource: sun4i: rename AUTORELOAD define to RELOAD
  clocksource: sun4i: Wrap macros arguments in parenthesis
  ...
2013-09-04 08:38:26 -07:00
Will Deacon d50240a5f6 arm64: mm: permit use of tagged pointers at EL0
TCR.TBI0 can be used to cause hardware address translation to ignore the
top byte of userspace virtual addresses. Whilst not especially useful in
standard C programs, this can be used by JITs to `tag' pointers with
various pieces of metadata.

This patch enables this bit for AArch64 Linux, and adds a new file to
Documentation/arm64/ which describes some potential caveats when using
tagged virtual addresses.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-09-03 10:18:02 +01:00
Dan Aloni 909e3ee411 Move the EM_ARM and EM_AARCH64 definitions to uapi/linux/elf-em.h
Signed-off-by: Dan Aloni <alonid@stratoscale.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-09-02 16:35:50 +01:00
Catalin Marinas f3a1d7d53d arm64: Remove unused cpu_name ascii in arch/arm64/mm/proc.S
This string has been moved to arch/arm64/kernel/cputable.c.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-09-02 16:33:54 +01:00
Will Deacon 326b16db9f arm64: delay: don't bother reporting bogomips in /proc/cpuinfo
We always use a timer-backed delay loop for arm64, so don't bother
reporting a bogomips value which appears to confuse some people.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-08-30 18:47:07 +01:00
Grant Likely a1727da599 of: consolidate definition of early_init_dt_alloc_memory_arch()
Most architectures use the same implementation. Collapse the common ones
into a single weak function that can be overridden.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-28 21:18:32 +01:00
Grant Likely 8be137f266 Linux 3.11-rc7
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.19 (GNU/Linux)
 
 iQEcBAABAgAGBQJSGqS5AAoJEHm+PkMAQRiGFxEH/3VrqF6WAkcviNiW/0DCdO8k
 v6Wi7Sp5LxVkwzmOCHCV1tTHwLRlH3cB9YmJlGQ0kHCREaAuEQAB0xJXIW7dnyYj
 Qq7KoRZEMe3wizmjEsj8qsrhfMLzHjBw67hBz2znwW/4P7YdgzwD7KRiEat+yRC9
 ON3nNL2zIqpfk92RXvVrSVl4KMEM+WNbOfiffgBiEP24Ja1MJMFH1d4i6hNOaB0x
 9Pb3Lw8let92x+8Ao5jnjKdKMgVsoZWbN/TgQR8zZOHM38AGGiDgk18vMz+L+hpS
 jqfjckxj1m30jGq0qZ9ZbMZx3IGif4KccVr30MqNHJpwi6Q24qXvT3YfA3HkstM=
 =nAab
 -----END PGP SIGNATURE-----

Merge tag 'v3.11-rc7' into devicetree/next

Linux 3.11-rc7
2013-08-28 20:18:13 +01:00
Catalin Marinas e25208f77c arm64: Fix mapping of memory banks not ending on a PMD_SIZE boundary
The map_mem() function limits the current memblock limit to PGDIR_SIZE
(the initial swapper_pg_dir mapping) to avoid create_mapping()
allocating memory from unmapped areas. However, if the first block is
within PGDIR_SIZE and not ending on a PMD_SIZE boundary, when 4K page
configuration is enabled, create_mapping() will try to allocate a pte
page. Such page may be returned by memblock_alloc() from the end of such
bank (or any subsequent bank within PGDIR_SIZE) which is not mapped yet.

The patch limits the current memblock limit to the aligned end of the
first bank and gradually increases it as more memory is mapped. It also
ensures that the start of the first bank is aligned to PMD_SIZE to avoid
pte page allocation for this mapping.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: "Leizhen (ThunderTown, Euler)" <thunder.leizhen@huawei.com>
Tested-by: "Leizhen (ThunderTown, Euler)" <thunder.leizhen@huawei.com>
2013-08-28 10:47:00 +01:00
Mark Salter c80b7ee852 arm64: move elf notes into readonly segment
The current vmlinux.lds.S places the notes sections between the
end of rw data and start of bss. This means that _edata doesn't
really point to the end of data. Since notes are read-only, this
patch moves them to the read-only segment so that _edata does
point to the end of initialized rw data.

Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-08-27 17:34:09 +01:00
Catalin Marinas 2600e130b3 arm64: Enable interrupts in the EL0 undef handler
do_undefinstr() has to be called with interrupts disabled since it may
read the instruction from the user address space which could lead to a
data abort and subsequent might_sleep() warning in do_page_fault().

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-08-22 11:47:37 +01:00
Roy Franz 4370eec05a arm64: Expand arm64 image header
Expand the arm64 image header to allow for co-existance with
PE/COFF header required by the EFI stub.  The PE/COFF format
requires the "MZ" header to be at offset 0, and the offset
to the PE/COFF header to be at offset 0x3c.  The image
header is expanded to allow 2 instructions at the beginning
to accommodate a benign intruction at offset 0 that includes
the "MZ" header, a magic number, and the offset to the PE/COFF
header.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-08-22 11:45:04 +01:00
Chen Gang 360b35a874 ARM64: include: asm: include "asm/types.h" in "pgtable-2level-types.h" and "pgtable-3level-types.h"
Need include "asm/types.h", just like arm has done, or can not pass
compiling, the related error:

  In file included from arch/arm64/include/asm/page.h:37:0,
                   from drivers/staging/lustre/include/linux/lnet/linux/lib-lnet.h:42,
                   from drivers/staging/lustre/include/linux/lnet/lib-lnet.h:44,
                   from drivers/staging/lustre/lnet/lnet/api-ni.c:38:
  arch/arm64/include/asm/pgtable-2level-types.h:19:1: error: unknown type name ‘u64
  arch/arm64/include/asm/pgtable-2level-types.h:20:1: error: unknown type name ‘u64’

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-08-22 11:44:41 +01:00
Linus Torvalds 7d06bafc4a Perf backend fixes for arm64 where the user can cause kernel panic
(discovered with Vince's fuzzing tool).
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJSE6M4AAoJEGvWsS0AyF7x7ZQP/3A+t3bH2fn6TmxzFyRRsi2i
 YbqX+OP+iGUrtzJQ9cR/cznml0yxePqFKXp76MWvtHkS9eMIcNhyWwhJRuDEV9Rx
 8PJq2yA9eNxYjDvhA+2vtbEEsHaYdu3O+w7tMoHxaBhveeDZIgk+/5YnSuLmDE2i
 HEEW2KYjiH7ILr5YhMJNotMIwyn5xg9r2nC96bDnLN0kjB4Khlaat5bikkn6DOrN
 39EQYV8R7fJSa6t3yYXnO4DBuMrqKdsswQR+JdkQfGCFxYz+BruF+v73f+zlVEd6
 a7Ie86Mjk/Gto7MzItU6PDqLnrTg3alTxYxCJQFj5SKtYX/+vzNicmmeG90PvPUV
 KQc5rVNIYEHu05J8wTHrwZRDFlpr4mllqy6KtmcWDfqgYg5wzj139PEBL4gyw4wb
 9qWk/ti/Nezk039Oh2EV/gUuZuHe2+a/4k2lbJqy8uUqsPvQtifDM6tJS1TgExG5
 X9AGfRMVtBmQH8K/6oVc+S5sXwlddcRBviTzggpvkY6KgJL6kWOuTBla0KKHvrQc
 Ok34e3Bxk5WuUnCa5rxaAW6Ewt9HqolMqL+Bgd0tvD5WKIRvT4pBG0a7mIhzeymM
 Uh1n7FOLLfSNIVm7YU/v6yPJ8v8w+QpJtzX17VzZf1ASHj5JUh6RRoX6Rwshaplv
 q6CA672f7Q7g5sG3HwOz
 =Lajp
 -----END PGP SIGNATURE-----

Merge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull arm64 perf fixes from Catalin Marinas:
 "Perf backend fixes for arm64 where the user can cause kernel panic
  (discovered with Vince's fuzzing tool)"

* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: perf: fix event validation for software group leaders
  arm64: perf: fix array out of bounds access in armpmu_map_hw_event()
2013-08-21 16:36:32 -07:00
Linus Torvalds 69bbe136a9 Fixes for ARM and aarch64.
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.13 (GNU/Linux)
 
 iQIcBAABAgAGBQJSEoS0AAoJEBvWZb6bTYbyE/8P/izUr1XtKBqtVuqVBMewEkeB
 SBgvJ2w681f4d+1waVAEPqWVGKHDvSOQC54sG6Y3fWHKijKGLiQhLaY3Y1WaLlO1
 B+duREwCwHaApjrpYoKhkyGQVpgyIfHBVe8d2TM9Q2bRuYNZEEcOtfdXk+Qfr6WR
 2kN+67ivJzAXvjs0uuRyJtXXq9cemcOnngsAfBlJz+j6UbiEdQ3l569D3wQU1jS2
 lUxxCEdtBDKDXkJUbTYvtJNYR48caqVXhYBTjpmY04207iSHmacUytOXO3rRA3OL
 fFhm/QeKVZND0XrJDUOMFzosWdUVdP5Qd5PtYoV/gEydNJMMpPs+dFKv+RXzrWlm
 2S2PWbFlkFT8yM+xwh6uKnLQ1aj614dkK2vKlp9GwDuwWiaod71C8ouTJvanNHGt
 pWgktFlfD+npSc3QDeXG5QB78pTSeyJfZBeVvA+U/etX+vjdfFWZ3bHMScrAE4DX
 xsdvtfamo0m9v2yZsnKzRWtCQq9No5FRb/c31w7yUzSXNBtyNR0Vft9gmiLo4HYa
 FQ0wC2UPyaKbfYtX0orpWnN3u4vaylGw2HuzK+2Mwi2HL+AMI6Piu//nrTbqb/i+
 1a6OARWvv9BQdbcuzBqznUdcllbmRl94kA5zXPvAz0dOBPQFU4X/t6dkxxH+8JFj
 mA/c2PHEyOtuFDOoqZxE
 =RlHG
 -----END PGP SIGNATURE-----

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

Pull kvm fixes from Paolo Bonzini:
 "Fixes for ARM and aarch64.

  This pull request is coming a bit later than I would have preferred,
  because I and Gleb happened to have holidays around the same weeks of
  August...  sorry about that"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: ARM: Squash len warning
  arm64: KVM: use 'int' instead of 'u32' for variable 'target' in kvm_host.h.
  arm64: KVM: add missing dsb before invalidating Stage-2 TLBs
  arm64: KVM: perform save/restore of PAR_EL1
  arm64: KVM: fix 2-level page tables unmapping
  ARM: KVM: Fix unaligned unmap_range leak
  ARM: KVM: Fix 64-bit coprocessor handling
2013-08-21 16:35:37 -07:00
Thomas Gleixner cfb6d656d5 Merge branch 'timers/clockevents-next' of git://git.linaro.org/people/dlezcano/clockevents into timers/core
* Support for memory mapped arch_timers
* Trivial fixes to the moxart timer code
* Documentation updates

Trivial conflicts in drivers/clocksource/arm_arch_timer.c. Fixed up
the newly added __cpuinit annotations as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-08-21 14:59:23 +02:00
Ard Biesheuvel 4cfb361364 arm64: add support for kernel mode NEON
Add <asm/neon.h> containing kernel_neon_begin/kernel_neon_end function
declarations and corresponding definitions in fpsimd.c

These are needed to wrap uses of NEON in kernel mode. The names are
identical to the ones used in arm/ so code using intrinsics or
vectorized by GCC can be shared between arm and arm64.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-08-20 12:12:26 +01:00
Will Deacon 178cd9ce37 arm64: perf: fix ARMv8 EVTYPE_MASK to include NSH bit
This is a port of f2fe09b055 ("ARM: 7663/1: perf: fix ARMv7 EVTYPE_MASK
to include NSH bit") to arm64, which fixes the broken evtype mask to
include the NSH bit, allowing profiling at EL2.

Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-08-20 12:12:25 +01:00
Will Deacon 8455e6ec70 arm64: perf: fix group validation when using enable_on_exec
This is a port of cb2d8b342a ("ARM: 7698/1: perf: fix group validation
when using enable_on_exec") to arm64, which fixes the event validation
checking so that events in the OFF state are still considered when
enable_on_exec is true.

Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-08-20 12:12:25 +01:00
Will Deacon ee7538a008 arm64: perf: fix event validation for software group leaders
This is a port of c95eb3184e ("ARM: 7809/1: perf: fix event validation
for software group leaders") to arm64, which fixes a panic in the arm64
perf backend found as a result of Vince's fuzzing tool.

Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-08-20 12:05:57 +01:00
Will Deacon 868f6fea8f arm64: perf: fix array out of bounds access in armpmu_map_hw_event()
This is a port of d9f966357b ("ARM: 7810/1: perf: Fix array out of
bounds access in armpmu_map_hw_event()") to arm64, which fixes an oops
in the arm64 perf backend found as a result of Vince's fuzzing tool.

Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-08-20 12:05:57 +01:00
Linus Torvalds 2b047252d0 Fix TLB gather virtual address range invalidation corner cases
Ben Tebulin reported:

 "Since v3.7.2 on two independent machines a very specific Git
  repository fails in 9/10 cases on git-fsck due to an SHA1/memory
  failures.  This only occurs on a very specific repository and can be
  reproduced stably on two independent laptops.  Git mailing list ran
  out of ideas and for me this looks like some very exotic kernel issue"

and bisected the failure to the backport of commit 53a59fc67f ("mm:
limit mmu_gather batching to fix soft lockups on !CONFIG_PREEMPT").

That commit itself is not actually buggy, but what it does is to make it
much more likely to hit the partial TLB invalidation case, since it
introduces a new case in tlb_next_batch() that previously only ever
happened when running out of memory.

The real bug is that the TLB gather virtual memory range setup is subtly
buggered.  It was introduced in commit 597e1c3580 ("mm/mmu_gather:
enable tlb flush range in generic mmu_gather"), and the range handling
was already fixed at least once in commit e6c495a96c ("mm: fix the TLB
range flushed when __tlb_remove_page() runs out of slots"), but that fix
was not complete.

The problem with the TLB gather virtual address range is that it isn't
set up by the initial tlb_gather_mmu() initialization (which didn't get
the TLB range information), but it is set up ad-hoc later by the
functions that actually flush the TLB.  And so any such case that forgot
to update the TLB range entries would potentially miss TLB invalidates.

Rather than try to figure out exactly which particular ad-hoc range
setup was missing (I personally suspect it's the hugetlb case in
zap_huge_pmd(), which didn't have the same logic as zap_pte_range()
did), this patch just gets rid of the problem at the source: make the
TLB range information available to tlb_gather_mmu(), and initialize it
when initializing all the other tlb gather fields.

This makes the patch larger, but conceptually much simpler.  And the end
result is much more understandable; even if you want to play games with
partial ranges when invalidating the TLB contents in chunks, now the
range information is always there, and anybody who doesn't want to
bother with it won't introduce subtle bugs.

Ben verified that this fixes his problem.

Reported-bisected-and-tested-by: Ben Tebulin <tebulin@googlemail.com>
Build-testing-by: Stephen Rothwell <sfr@canb.auug.org.au>
Build-testing-by: Richard Weinberger <richard.weinberger@gmail.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-08-16 08:52:46 -07:00
Chen Gang 6c8c0c4dc0 arm64: KVM: use 'int' instead of 'u32' for variable 'target' in kvm_host.h.
'target' will be set to '-1' in kvm_arch_vcpu_init(), and it need check
'target' whether less than zero or not in kvm_vcpu_initialized().

So need define target as 'int' instead of 'u32', just like ARM has done.

The related warning:

  arch/arm64/kvm/../../../arch/arm/kvm/arm.c:497:2: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]

Signed-off-by: Chen Gang <gang.chen@asianux.com>
[Marc: reformated the Subject line to fit the series]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-08-09 13:42:43 +01:00
Marc Zyngier f142e5eeb7 arm64: KVM: add missing dsb before invalidating Stage-2 TLBs
When performing a Stage-2 TLB invalidation, it is necessary to
make sure the write to the page tables is observable by all CPUs.

For this purpose, add dsb instructions to __kvm_tlb_flush_vmid_ipa
and __kvm_flush_vm_context before doing the TLB invalidation itself.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-08-09 13:19:28 +01:00
Marc Zyngier 1bbd805498 arm64: KVM: perform save/restore of PAR_EL1
Not saving PAR_EL1 is an unfortunate oversight. If the guest
performs an AT* operation and gets scheduled out before reading
the result of the translation from PAREL1, it could become
corrupted by another guest or the host.

Saving this register is made slightly more complicated as KVM also
uses it on the permission fault handling path, leading to an ugly
"stash and restore" sequence. Fortunately, this is already a slow
path so we don't really care. Also, Linux doesn't do any AT*
operation, so Linux guests are not impacted by this bug.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-08-09 13:19:28 +01:00
Stephen Boyd 60faddf6eb clocksource: arch_timer: Push the read/write wrappers deeper
We're going to introduce support to read and write the memory
mapped timer registers in the next patch, so push the cp15
read/write functions one level deeper. This simplifies the next
patch and makes it clearer what's going on.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <Marc.Zyngier@arm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
2013-08-01 01:13:37 +02:00
Stephen Boyd e09f3cc018 clocksource: arch_timer: Make register accessors less error-prone
Using an enum for the register we wish to access allows newer
compilers to determine if we've forgotten a case in our switch
statement. This allows us to remove the BUILD_BUG() instances in
the arm64 port, avoiding problems where optimizations may not
happen.

To try and force better code generation we're currently marking
the accessor functions as inline, but newer compilers can ignore
the inline keyword unless it's marked __always_inline. Luckily on
arm and arm64 inline is __always_inline, but let's make
everything __always_inline to be explicit.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <Marc.Zyngier@arm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
2013-08-01 01:13:35 +02:00
Feng Kan 845ad05ec3 arm64: Change kernel stack size to 16K
Written by Catalin Marinas, tested by APM on storm platform. This is needed
because of the failures encountered when running SpecWeb benchmark test.

Signed-off-by: Feng Kan <fkan@apm.com>
Acked-by: Kumar Sankaran <ksankaran@apm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-07-26 13:37:29 +01:00
Santosh Shilimkar 374d5c9964 of: Specify initrd location using 64-bit
On some PAE architectures, the entire range of physical memory could reside
outside the 32-bit limit.  These systems need the ability to specify the
initrd location using 64-bit numbers.

This patch globally modifies the early_init_dt_setup_initrd_arch() function to
use 64-bit numbers instead of the current unsigned long.

There has been quite a bit of debate about whether to use u64 or phys_addr_t.
It was concluded to stick to u64 to be consistent with rest of the device
tree code. As summarized by Geert, "The address to load the initrd is decided
by the bootloader/user and set at that point later in time. The dtb should not
be tied to the kernel you are booting"

More details on the discussion can be found here:
https://lkml.org/lkml/2013/6/20/690
https://lkml.org/lkml/2012/9/13/544

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-07-24 11:10:01 +01:00
Catalin Marinas b0946fc846 arm64: Fix definition of arm_pm_restart to match the declaration
Commit ff70130 (arm64: use common reboot infrastructure) converted the
arm_pm_restart declaration to the new reboot infrastructure but missed
the actual definition.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-07-23 11:05:10 +01:00
Mark Rutland 82b2f495fb arm64: virt: ensure visibility of __boot_cpu_mode
Secondary CPUs write to __boot_cpu_mode with caches disabled, and thus a
cached value of __boot_cpu_mode may be incoherent with that in memory.
This could lead to a failure to detect mismatched boot modes.

This patch adds flushing to ensure that writes by secondaries to
__boot_cpu_mode are made visible before we test against it.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <cdall@cs.columbia.edu>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-07-23 11:00:24 +01:00
Linus Torvalds 89d0abe3d6 - Post -rc1 update to the common reboot infrastructure.
- Fixes (user cache maintenance fault handling, !COMPAT compilation, CPU
   online and interrupt hanlding).
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJR6WGUAAoJEGvWsS0AyF7xaMQP/3WSpcEUQ+k8wCbjzkbpnQJ3
 Z0Ufz0XeBUgmaZNwYFjnpVTm/R04F1gcsoA5qE//6iMkbcpbM2sWVN/uQvY3l+fQ
 haJmCWZ7PIXxm3vbKrcSBiJ+WKpvUkzlL+Q1upmQWFCxkP6noejCsvazM5lPgt1q
 1Vr5/9q87TOfxG8Udki3pPqRazd4YwQJx6JCZ46P+mlqQk9gxDoQ7RRXy9Viv+SV
 6Jq5Lt8Qj7iXmq8DDTYdF7DHE7rnIhdCUhJu7UN1G/O7U4s9nlUbv55fHMY76ZAn
 BddgNtIsMsvfIxlYZ6f0r2ccrgPHaDTLVW/q0VkwdP8jD2EQWAK7gI21OgQm0ebl
 OL+t29zdx9nidpI+cCTlwejh8i7vRsoxgYki5qfnYR3SHL5HhQSHrUTZvEFr+u4I
 ceXnDmTZ46HmPSCC6/5cFiXxsw1zbBxSB7rNFvXmF2Jr7F3TvAxCWvrIfmrmYdrC
 bw4UMBB15SaJud3maqVGhj6aVo4bEand4g++Dk0ytXbGq+5Ke5CktmPOmzNLVu9p
 R8tHDyp9szFP0eqqF1/XTZx2rsHvop7D1QUpQVgFC+mRWI3gjtFPtShW1GgbQQ+P
 t7gvHJQ2SF1BRTSf6KH/cqXDgHzpg3VuP2moM7YbR0/qvRf7Eh/M3Hrg/s6xCeKr
 ywmW7/+McIz3kDsk1gUM
 =M4kj
 -----END PGP SIGNATURE-----

Merge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull arm64 fixes from Catalin Marinas:
 - Post -rc1 update to the common reboot infrastructure.
 - Fixes (user cache maintenance fault handling, !COMPAT compilation,
   CPU online and interrupt hanlding).

* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: use common reboot infrastructure
  arm64: mm: don't treat user cache maintenance faults as writes
  arm64: add '#ifdef CONFIG_COMPAT' for aarch32_break_handler()
  arm64: Only enable local interrupts after the CPU is marked online
2013-07-19 15:08:53 -07:00
Marc Zyngier ff701306cd arm64: use common reboot infrastructure
Commit 7b6d864b48 (reboot: arm: change reboot_mode to use enum
reboot_mode) changed the way reboot is handled on arm, which has a
direct impact on arm64 as we share the reset driver on the VE platform.

The obvious fix is to move arm64 to use the same infrastructure.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
[catalin.marinas@arm.com: removed reboot_mode = REBOOT_HARD default setting]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-07-19 15:57:08 +01:00
Will Deacon db6f41063c arm64: mm: don't treat user cache maintenance faults as writes
On arm64, cache maintenance faults appear as data aborts with the CM
bit set in the ESR. The WnR bit, usually used to distinguish between
faulting loads and stores, always reads as 1 and (slightly confusingly)
the instructions are treated as reads by the architecture.

This patch fixes our fault handling code to treat cache maintenance
faults in the same way as loads.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-07-19 15:49:44 +01:00
Chen Gang c783c2815e arm64: add '#ifdef CONFIG_COMPAT' for aarch32_break_handler()
If 'COMPAT' not defined, aarch32_break_handler() cannot pass compiling,
and it can work independent with 'COMPAT', so remove dummy definition.

The related error:

  arch/arm64/kernel/debug-monitors.c:249:5: error: redefinition of ‘aarch32_break_handler’
  In file included from arch/arm64/kernel/debug-monitors.c:29:0:
  /root/linux-next/arch/arm64/include/asm/debug-monitors.h:89:12: note: previous definition of ‘aarch32_break_handler’ was here

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-07-19 15:49:43 +01:00
Catalin Marinas 53ae3acd43 arm64: Only enable local interrupts after the CPU is marked online
There is a slight chance that (timer) interrupts are triggered before a
secondary CPU has been marked online with implications on softirq thread
affinity.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Kirill Tkhai <tkhai@yandex.ru>
2013-07-19 15:49:42 +01:00
Paul Gortmaker b8c6453aaf arm64: delete __cpuinit usage from all users
The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications.  For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.

After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out.  Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.

Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
are flagged as __cpuinit  -- so if we remove the __cpuinit from
arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
content into no-ops as early as possible, since that will get rid
of these warnings.  In any case, they are temporary and harmless.

This removes all the arch/arm64 uses of the __cpuinit macros from
all C files.  Currently arm64 does not have any __CPUINIT used in
assembly files.

[1] https://lkml.org/lkml/2013/5/20/589

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2013-07-14 19:36:52 -04:00
Linus Torvalds 64fb6d9aa0 Merge tag 'kvm-3.11-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull more KVM changes from Gleb Natapov:
 "A fix for a bug that prevents some guests from working on old Intel
  CPUs and a patch that integrates ARM64 KVM, merged via ARM64 tree,
  into Kconfig."

* tag 'kvm-3.11-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: VMX: mark unusable segment as nonpresent
  arm64: KVM: Kconfig integration
2013-07-10 18:17:41 -07:00
Michel Lespinasse 98d1e64f95 mm: remove free_area_cache
Since all architectures have been converted to use vm_unmapped_area(),
there is no remaining use for the free_area_cache.

Signed-off-by: Michel Lespinasse <walken@google.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-10 18:11:34 -07:00
Linus Torvalds 16984ce15e tmem hypercall for arm and arm64
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.10 (GNU/Linux)
 
 iQIcBAABAgAGBQJR1qpUAAoJEIlPj0hw4a6Q2qUP/0GUvRJZnx5bJlhy4GZ3OfmD
 o6FIbSwmGDWg71L/Ey9xZO0I9oQVe2fyt4azRZ1aCewf16xkmSIYa46Cye7VlMa2
 BOVqB8oEse7ui2nG85NLarvi/GJYa0NnRetDjo4/4zMk34MVdX0g9RQZPLDcVpcK
 LaPNDqDM5CqjWwYrrcDoo6GqO47xsVM4hteDBR0PvZu1bIdTUOW5AuxBTMxxnOPX
 K27sNI2JoKe0G9v9XU75yYIMWhumJZfJjQJFgSWdLme6659cJjwcjeZPuXxfwAkW
 0m3pMtr1mmxMzdBXox+46rvlIxg/NSg2kp0fWLt4zbXPxdPOn+GO+fBe19ACA+4C
 Nm5TSLDybnSpLrbVt4wH3lE46/12CMnLUNsG5A9S+S098qh6FanTKU2xjPFCzWnh
 7JHf9f/wQT/N8IhhwWDSgdeqaClujtqkfOouNk12y7cqSzQBFxfkmQx3ytguo7X3
 /hZa+5yCj9EgOvbvZ4+2vZ/irXJiJwhY3Bgwwxa/tKW2a0wvOKIBC4ysO25/u4CO
 XXbOCHiDhV+My7C5zsqPxrKKNnPLCgszebp8xRrqEI8SZkHM57tiFXvVpM1kZf92
 QLLOVs7O/wXGav220qeiqAvd2dnxtbKhcFrvGYxTbU+noo+6Q8Y/bc5qLBD8B39q
 8u5GNwQeesR5S92mBXTg
 =XQbF
 -----END PGP SIGNATURE-----

Merge tag 'xenarm-for-3.11-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/sstabellini/xen

Pull Xen ARM update rom Stefano Stabellini:
 "Just one commit this time: the implementation of the tmem hypercall
  for arm and arm64"

* tag 'xenarm-for-3.11-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/sstabellini/xen:
  xen/arm and xen/arm64: implement HYPERVISOR_tmem_op
2013-07-06 12:38:42 -07:00
Marc Zyngier c3eb5b1444 arm64: KVM: Kconfig integration
Finally plug KVM/arm64 into the config system, making it possible
to enable KVM support on AArch64 CPUs.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-07-04 14:40:26 +02:00
Stefano Stabellini 176455e9a9 xen/arm and xen/arm64: implement HYPERVISOR_tmem_op
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2013-07-04 11:41:12 +00:00
Jiang Liu 6879ea83c6 mm/microblaze: prepare for removing num_physpages and simplify mem_init()
Prepare for removing num_physpages and simplify mem_init().

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-03 16:07:36 -07:00
Jiang Liu bee4ebd117 mm/ARM64: prepare for removing num_physpages and simplify mem_init()
Prepare for removing num_physpages and simplify mem_init().

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-03 16:07:35 -07:00
Jiang Liu 0c98853473 mm: concentrate modification of totalram_pages into the mm core
Concentrate code to modify totalram_pages into the mm core, so the arch
memory initialized code doesn't need to take care of it.  With these
changes applied, only following functions from mm core modify global
variable totalram_pages: free_bootmem_late(), free_all_bootmem(),
free_all_bootmem_node(), adjust_managed_page_count().

With this patch applied, it will be much more easier for us to keep
totalram_pages and zone->managed_pages in consistence.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: David Howells <dhowells@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: <sworddragon2@aol.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Jianguo Wu <wujianguo@huawei.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michel Lespinasse <walken@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-03 16:07:33 -07:00
Jiang Liu 9af5b80765 mm/ARM64: kill poison_init_mem()
Use free_reserved_area() to poison initmem memory pages and kill
poison_init_mem() on ARM64.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: <sworddragon2@aol.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Jianguo Wu <wujianguo@huawei.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michel Lespinasse <walken@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-03 16:07:32 -07:00
Jiang Liu dbe67df4ba mm: enhance free_reserved_area() to support poisoning memory with zero
Address more review comments from last round of code review.
1) Enhance free_reserved_area() to support poisoning freed memory with
   pattern '0'. This could be used to get rid of poison_init_mem()
   on ARM64.
2) A previous patch has disabled memory poison for initmem on s390
   by mistake, so restore to the original behavior.
3) Remove redundant PAGE_ALIGN() when calling free_reserved_area().

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: <sworddragon2@aol.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Jianguo Wu <wujianguo@huawei.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michel Lespinasse <walken@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-03 16:07:32 -07:00
Jiang Liu 11199692d8 mm: change signature of free_reserved_area() to fix building warnings
Change signature of free_reserved_area() according to Russell King's
suggestion to fix following build warnings:

  arch/arm/mm/init.c: In function 'mem_init':
  arch/arm/mm/init.c:603:2: warning: passing argument 1 of 'free_reserved_area' makes integer from pointer without a cast [enabled by default]
    free_reserved_area(__va(PHYS_PFN_OFFSET), swapper_pg_dir, 0, NULL);
    ^
  In file included from include/linux/mman.h:4:0,
                   from arch/arm/mm/init.c:15:
  include/linux/mm.h:1301:22: note: expected 'long unsigned int' but argument is of type 'void *'
   extern unsigned long free_reserved_area(unsigned long start, unsigned long end,

   mm/page_alloc.c: In function 'free_reserved_area':
>> mm/page_alloc.c:5134:3: warning: passing argument 1 of 'virt_to_phys' makes pointer from integer without a cast [enabled by default]
   In file included from arch/mips/include/asm/page.h:49:0,
                    from include/linux/mmzone.h:20,
                    from include/linux/gfp.h:4,
                    from include/linux/mm.h:8,
                    from mm/page_alloc.c:18:
   arch/mips/include/asm/io.h:119:29: note: expected 'const volatile void *' but argument is of type 'long unsigned int'
   mm/page_alloc.c: In function 'free_area_init_nodes':
   mm/page_alloc.c:5030:34: warning: array subscript is below array bounds [-Warray-bounds]

Also address some minor code review comments.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: <sworddragon2@aol.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Jianguo Wu <wujianguo@huawei.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michel Lespinasse <walken@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-03 16:07:32 -07:00
Linus Torvalds 1873e50028 Main features:
- KVM and Xen ports to AArch64
 - Hugetlbfs and transparent huge pages support for arm64
 - Applied Micro X-Gene Kconfig entry and dts file
 - Cache flushing improvements
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJR0bZAAAoJEGvWsS0AyF7xTEEP/R/aRoqWwbVAMlwAhujq616O
 t4RzIyBXZXqxS9I+raokCX4mgYxdeisJlzN2hoq73VEX2BQlXZoYh8vmfY9WeNSM
 2pdfif2HF7oo9ymCRyqfuhbumPrTyJhpbguzOYrxPqpp2f1hv2D8hbUJEFj429yL
 UjqTFoONngfouZmAlwrPGZQKhBI95vvN53yvDMH0PWfvpm07DKGIQMYp20y0pj8j
 slhLH3bh2kfpS1cf23JtH6IICwWD2pXW0POo569CfZry6bI74xve+Trcsm7iPnsO
 PSI1P046ME1mu3SBbKwiPIdN/FQqWwTHW07fvMmH/xuXu3Zs/mxgzi7vDzDrVvTg
 PJSbKWD6N/IPPwKS/gCUmWWDASO0bXx3KlDuRZqAjbRojs0UPUOTUhzJM/BHUms1
 vY2QS9lAm02LmZZrk1LeKKP85gB+qKQvHuOVhIOldWeLGKtsNufz1kynz6YTqsLq
 uUB55KwbhQ7q8+aoY6lWujqiTXMoLkBgGdjHs2I407PAv7ZjlhRWk2fIry7xJifp
 rKu2cIlWsRe4CGvGI410NvIJFrGvJAV4wA43sgBDjPumyILgT/5jw9r3RpJEBZZs
 akw/Bl1CbL+gMjyoPUWgcWZdRkUCE0eLrgyMOmaYfst8cOTaWw4dWLvUG/bBZg+Y
 mGnuEQUQtAPadk8P/Sv3
 =PZ/e
 -----END PGP SIGNATURE-----

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull ARM64 updates from Catalin Marinas:
 "Main features:
   - KVM and Xen ports to AArch64
   - Hugetlbfs and transparent huge pages support for arm64
   - Applied Micro X-Gene Kconfig entry and dts file
   - Cache flushing improvements

  For arm64 huge pages support, there are x86 changes moving part of
  arch/x86/mm/hugetlbpage.c into mm/hugetlb.c to be re-used by arm64"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: (66 commits)
  arm64: Add initial DTS for APM X-Gene Storm SOC and APM Mustang board
  arm64: Add defines for APM ARMv8 implementation
  arm64: Enable APM X-Gene SOC family in the defconfig
  arm64: Add Kconfig option for APM X-Gene SOC family
  arm64/Makefile: provide vdso_install target
  ARM64: mm: THP support.
  ARM64: mm: Raise MAX_ORDER for 64KB pages and THP.
  ARM64: mm: HugeTLB support.
  ARM64: mm: Move PTE_PROT_NONE bit.
  ARM64: mm: Make PAGE_NONE pages read only and no-execute.
  ARM64: mm: Restore memblock limit when map_mem finished.
  mm: thp: Correct the HPAGE_PMD_ORDER check.
  x86: mm: Remove general hugetlb code from x86.
  mm: hugetlb: Copy general hugetlb code from x86 to mm.
  x86: mm: Remove x86 version of huge_pmd_share.
  mm: hugetlb: Copy huge_pmd_share from x86 to mm.
  arm64: KVM: document kernel object mappings in HYP
  arm64: KVM: MAINTAINERS update
  arm64: KVM: userspace API documentation
  arm64: KVM: enable initialization of a 32bit vcpu
  ...
2013-07-03 10:31:38 -07:00
Linus Torvalds fb2af0020a Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM updates from Russell King:
 "This contains the usual updates from other people (listed below) and
  the usual random muddle of miscellaneous ARM updates which cover some
  low priority bug fixes and performance improvements.

  I've started to put the pull request wording into the merge commits,
  which are:

   - NoMMU stuff:

     This includes the following series sent earlier to the list:
      - nommu-fixes
      - R7 Support
      - MPU support

     I've left out the ARCH_MULTIPLATFORM/!MMU stuff that Arnd and I
     were discussing today until we've reached a conclusion/that's had
     some more review.

     This is rebased (and re-tested) on your devel-stable branch because
     otherwise there were going to be conflicts with Uwe's V7M work now
     that you've merged that.  I've included the fix for limiting MPU to
     CPU_V7.

   - Huge page support

     These changes bring both HugeTLB support and Transparent HugePage
     (THP) support to ARM.  Only long descriptors (LPAE) are supported
     in this series.

     The code has been tested on an Arndale board (Exynos 5250).

   - LPAE updates

     Please pull these miscellaneous LPAE fixes I've been collecting for
     a while now for 3.11.  They've been tested and reviewed by quite a
     few people, and most of the patches are pretty trivial.  -- Will Deacon.

   - arch_timer cleanups

     Please pull these arch_timer cleanups I've been holding onto for a
     while.  They're the same as my last posting, but have been rebased
     to v3.10-rc3.

   - mpidr linearisation (multiprocessor id register - identifies which
     CPU number we are in the system)

     This patch series that implements MPIDR linearization through a
     simple hashing algorithm and updates current cpu_{suspend}/{resume}
     code to use the newly created hash structures to retrieve context
     pointers.  It represents a stepping stone for the implementation of
     power management code on forthcoming multi-cluster ARM systems.

     It has been tested on TC2 (dual cluster A15xA7 system), iMX6q,
     OMAP4 and Tegra, with processors hitting low-power states requiring
     warm-boot resume through the cpu_resume code path"

* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (77 commits)
  ARM: 7775/1: mm: Remove do_sect_fault from LPAE code
  ARM: 7777/1: Avoid extra calls to the C compiler
  ARM: 7774/1: Fix dtb dependency to use order-only prerequisites
  ARM: 7770/1: remove residual ARMv2 support from decompressor
  ARM: 7769/1: Cortex-A15: fix erratum 798181 implementation
  ARM: 7768/1: prevent risks of out-of-bound access in ASID allocator
  ARM: 7767/1: let the ASID allocator handle suspended animation
  ARM: 7766/1: versatile: don't mark pen as __INIT
  ARM: 7765/1: perf: Record the user-mode PC in the call chain.
  ARM: 7735/2: Preserve the user r/w register TPIDRURW on context switch and fork
  ARM: kernel: implement stack pointer save array through MPIDR hashing
  ARM: kernel: build MPIDR hash function data structure
  ARM: mpu: Ensure that MPU depends on CPU_V7
  ARM: mpu: protect the vectors page with an MPU region
  ARM: mpu: Allow enabling of the MPU via kconfig
  ARM: 7758/1: introduce config HAS_BANDGAP
  ARM: 7757/1: mm: don't flush icache in switch_mm with hardware broadcasting
  ARM: 7751/1: zImage: don't overwrite ourself with a page table
  ARM: 7749/1: spinlock: retry trylock operation if strex fails on free lock
  ARM: 7748/1: oabi: handle faults when loading swi instruction from userspace
  ...
2013-07-03 09:46:29 -07:00
Linus Torvalds e13053f506 Merge branch 'sched-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull voluntary preemption fixes from Ingo Molnar:
 "This tree contains a speedup which is achieved through better
  might_sleep()/might_fault() preemption point annotations for uaccess
  functions, by Michael S Tsirkin:

  1. The only reason uaccess routines might sleep is if they fault.
     Make this explicit for all architectures.

  2. A voluntary preemption point in uaccess functions means compiler
     can't inline them efficiently, this breaks assumptions that they
     are very fast and small that e.g.  net code seems to make.  Remove
     this preemption point so behaviour matches with what callers
     assume.

  3. Accesses (e.g through socket ops) to kernel memory with KERNEL_DS
     like net/sunrpc does will never sleep.  Remove an unconditinal
     might_sleep() in the might_fault() inline in kernel.h (used when
     PROVE_LOCKING is not set).

  4. Accesses with pagefault_disable() return EFAULT but won't cause
     caller to sleep.  Check for that and thus avoid might_sleep() when
     PROVE_LOCKING is set.

  These changes offer a nice speedup for CONFIG_PREEMPT_VOLUNTARY=y
  kernels, here's a network bandwidth measurement between a virtual
  machine and the host:

   before:
        incoming: 7122.77   Mb/s
        outgoing: 8480.37   Mb/s

   after:
        incoming: 8619.24   Mb/s   [ +21.0% ]
        outgoing: 9455.42   Mb/s   [ +11.5% ]

  I kept these changes in a separate tree, separate from scheduler
  changes, because it's a mixed MM and scheduler topic"

* 'sched-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  mm, sched: Allow uaccess in atomic with pagefault_disable()
  mm, sched: Drop voluntary schedule from might_fault()
  x86: uaccess s/might_sleep/might_fault/
  tile: uaccess s/might_sleep/might_fault/
  powerpc: uaccess s/might_sleep/might_fault/
  mn10300: uaccess s/might_sleep/might_fault/
  microblaze: uaccess s/might_sleep/might_fault/
  m32r: uaccess s/might_sleep/might_fault/
  frv: uaccess s/might_sleep/might_fault/
  arm64: uaccess s/might_sleep/might_fault/
  asm-generic: uaccess s/might_sleep/might_fault/
2013-07-02 16:19:24 -07:00
Linus Torvalds 63580e51bb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull VFS patches (part 1) from Al Viro:
 "The major change in this pile is ->readdir() replacement with
  ->iterate(), dealing with ->f_pos races in ->readdir() instances for
  good.

  There's a lot more, but I'd prefer to split the pull request into
  several stages and this is the first obvious cutoff point."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (67 commits)
  [readdir] constify ->actor
  [readdir] ->readdir() is gone
  [readdir] convert ecryptfs
  [readdir] convert coda
  [readdir] convert ocfs2
  [readdir] convert fatfs
  [readdir] convert xfs
  [readdir] convert btrfs
  [readdir] convert hostfs
  [readdir] convert afs
  [readdir] convert ncpfs
  [readdir] convert hfsplus
  [readdir] convert hfs
  [readdir] convert befs
  [readdir] convert cifs
  [readdir] convert freevxfs
  [readdir] convert fuse
  [readdir] convert hpfs
  reiserfs: switch reiserfs_readdir_dentry to inode
  reiserfs: is_privroot_deh() needs only directory inode, actually
  ...
2013-07-02 09:28:37 -07:00
Catalin Marinas aa729dccb5 Merge branch 'for-next/hugepages' of git://git.linaro.org/people/stevecapper/linux into upstream-hugepages
* 'for-next/hugepages' of git://git.linaro.org/people/stevecapper/linux:
  ARM64: mm: THP support.
  ARM64: mm: Raise MAX_ORDER for 64KB pages and THP.
  ARM64: mm: HugeTLB support.
  ARM64: mm: Move PTE_PROT_NONE bit.
  ARM64: mm: Make PAGE_NONE pages read only and no-execute.
  ARM64: mm: Restore memblock limit when map_mem finished.
  mm: thp: Correct the HPAGE_PMD_ORDER check.
  x86: mm: Remove general hugetlb code from x86.
  mm: hugetlb: Copy general hugetlb code from x86 to mm.
  x86: mm: Remove x86 version of huge_pmd_share.
  mm: hugetlb: Copy huge_pmd_share from x86 to mm.

Conflicts:
	arch/arm64/Kconfig
	arch/arm64/include/asm/pgtable-hwdef.h
	arch/arm64/include/asm/pgtable.h
2013-07-01 11:20:58 +01:00
Russell King 3c0c01ab74 Merge branch 'devel-stable' into for-next
Conflicts:
	arch/arm/Makefile
	arch/arm/include/asm/glue-proc.h
2013-06-29 11:44:43 +01:00
Al Viro 40d158e618 consolidate io_remap_pfn_range definitions
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29 12:46:35 +04:00
Vinayak Kale ee877b5321 arm64: Add initial DTS for APM X-Gene Storm SOC and APM Mustang board
This patch adds initial DTS files required for APM Mustang board.

Signed-off-by: Kumar Sankaran <ksankaran@apm.com>
Signed-off-by: Loc Ho <lho@apm.com>
Signed-off-by: Feng Kan <fkan@apm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-20 17:03:59 +01:00
Vinayak Kale 4ad637a452 arm64: Add defines for APM ARMv8 implementation
This patch adds defines for APM CPU implementer ID and APM CPU part numbers in asm/cputype.h

Signed-off-by: Kumar Sankaran <ksankaran@apm.com>
Signed-off-by: Loc Ho <lho@apm.com>
Signed-off-by: Feng Kan <fkan@apm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-20 17:03:59 +01:00
Vinayak Kale c1db16dc9e arm64: Enable APM X-Gene SOC family in the defconfig
This patch enables APM X-Gene SOC family in the defconfig. It also enables 8250 serial driver needed by X-Gene SOC family.

Signed-off-by: Kumar Sankaran <ksankaran@apm.com>
Signed-off-by: Loc Ho <lho@apm.com>
Signed-off-by: Feng Kan <fkan@apm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-20 17:03:59 +01:00
Vinayak Kale 1594285383 arm64: Add Kconfig option for APM X-Gene SOC family
This patch adds arm64/Kconfig option for APM X-Gene SOC family.

Signed-off-by: Kumar Sankaran <ksankaran@apm.com>
Signed-off-by: Loc Ho <lho@apm.com>
Signed-off-by: Feng Kan <fkan@apm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-20 17:02:09 +01:00
Jed Davis abc4125418 perf: arm64: Record the user-mode PC in the call chain.
With this change, we no longer lose the innermost entry in the user-mode
part of the call chain.  See also the x86 port, which includes the ip,
and the corresponding change in arch/arm.

Signed-off-by: Jed Davis <jld@mozilla.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-20 10:16:39 +01:00
Kyle McMartin 3c01742a8a arm64/Makefile: provide vdso_install target
Provide a vdso_install target in the arm64 Makefile, as other architectures
with a vdso do.

Signed-off-by: Kyle McMartin <kyle@redhat.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-19 17:54:06 +01:00
Steve Capper af07484863 ARM64: mm: THP support.
Bring Transparent HugePage support to ARM. The size of a
transparent huge page depends on the normal page size. A
transparent huge page is always represented as a pmd.

If PAGE_SIZE is 4KB, THPs are 2MB.
If PAGE_SIZE is 64KB, THPs are 512MB.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-14 09:52:41 +01:00
Steve Capper d03bb1455f ARM64: mm: Raise MAX_ORDER for 64KB pages and THP.
The buddy allocator has a default MAX_ORDER of 11, which is too
low to allocate enough memory for 512MB Transparent HugePages if
our base page size is 64KB.

This patch introduces MAX_ZONE_ORDER and sets it to 14 when 64KB
pages are used in conjuction with THP, otherwise the default value
of 11 is used.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-14 09:52:40 +01:00
Steve Capper 084bd29810 ARM64: mm: HugeTLB support.
Add huge page support to ARM64, different huge page sizes are
supported depending on the size of normal pages:

PAGE_SIZE is 4KB:
   2MB - (pmds) these can be allocated at any time.
1024MB - (puds) usually allocated on bootup with the command line
         with something like: hugepagesz=1G hugepages=6

PAGE_SIZE is 64KB:
 512MB - (pmds) usually allocated on bootup via command line.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-14 09:52:40 +01:00
Steve Capper 59911ca432 ARM64: mm: Move PTE_PROT_NONE bit.
Under ARM64, PTEs can be broadly categorised as follows:
   - Present and valid: Bit #0 is set. The PTE is valid and memory
     access to the region may fault.

   - Present and invalid: Bit #0 is clear and bit #1 is set.
     Represents present memory with PROT_NONE protection. The PTE
     is an invalid entry, and the user fault handler will raise a
     SIGSEGV.

   - Not present (file or swap): Bits #0 and #1 are clear.
     Memory represented has been paged out. The PTE is an invalid
     entry, and the fault handler will try and re-populate the
     memory where necessary.

Huge PTEs are block descriptors that have bit #1 clear. If we wish
to represent PROT_NONE huge PTEs we then run into a problem as
there is no way to distinguish between regular and huge PTEs if we
set bit #1.

To resolve this ambiguity this patch moves PTE_PROT_NONE from
bit #1 to bit #2 and moves PTE_FILE from bit #2 to bit #3. The
number of swap/file bits is reduced by 1 as a consequence, leaving
60 bits for file and swap entries.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-14 09:52:19 +01:00
Steve Capper 072b1b62a6 ARM64: mm: Make PAGE_NONE pages read only and no-execute.
If we consider the following code sequence:

	my_pte = pte_modify(entry, myprot);
	x = pte_write(my_pte);
	y = pte_exec(my_pte);

If myprot comes from a PROT_NONE page, then x and y will both be
true which is undesireable behaviour.

This patch sets the no-execute and read-only bits for PAGE_NONE
such that the code above will return false for both x and y.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-14 09:42:46 +01:00
Steve Capper f6bc87c39d ARM64: mm: Restore memblock limit when map_mem finished.
In paging_init the memblock limit is set to restrict any addresses
returned by early_alloc to fit within the initial direct kernel
mapping in swapper_pg_dir. This allows map_mem to allocate puds,
pmds and ptes from the initial direct kernel mapping.

The limit stays low after paging_init() though, meaning any
bootmem allocations will be from a restricted subset of memory.
Gigabyte huge pages, for instance, are normally allocated from
bootmem as their order (18) is too large for the default buddy
allocator (MAX_ORDER = 11).

This patch restores the memblock limit when map_mem has finished,
allowing gigabyte huge pages (and other objects) to be allocated
from all of bootmem.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-14 09:40:39 +01:00
Catalin Marinas 63917f0b5b Merge branch 'kvm-arm64/kvm-for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into upstream
* 'kvm-arm64/kvm-for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms: (33 commits)
  arm64: KVM: document kernel object mappings in HYP
  arm64: KVM: MAINTAINERS update
  arm64: KVM: userspace API documentation
  arm64: KVM: enable initialization of a 32bit vcpu
  arm64: KVM: 32bit guest fault injection
  arm64: KVM: 32bit specific register world switch
  arm64: KVM: CPU specific 32bit coprocessor access
  arm64: KVM: 32bit handling of coprocessor traps
  arm64: KVM: 32bit conditional execution emulation
  arm64: KVM: 32bit GP register access
  arm64: KVM: define 32bit specific registers
  arm64: KVM: Build system integration
  arm64: KVM: PSCI implementation
  arm64: KVM: Plug the arch timer
  ARM: KVM: timer: allow DT matching for ARMv8 cores
  arm64: KVM: Plug the VGIC
  arm64: KVM: Exit handling
  arm64: KVM: HYP mode world switch implementation
  arm64: KVM: hypervisor initialization code
  arm64: KVM: guest one-reg interface
  ...

Conflicts:
	arch/arm64/Makefile
2013-06-12 16:48:38 +01:00
Marc Zyngier 0d854a60b1 arm64: KVM: enable initialization of a 32bit vcpu
Wire the init of a 32bit vcpu by allowing 32bit modes in pstate,
and providing sensible defaults out of reset state.

This feature is of course conditioned by the presence of 32bit
capability on the physical CPU, and is checked by the KVM_CAP_ARM_EL1_32BIT
capability.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:42:18 +01:00
Marc Zyngier e82e030556 arm64: KVM: 32bit guest fault injection
Add fault injection capability for 32bit guests.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:42:18 +01:00
Marc Zyngier b4afad06c1 arm64: KVM: 32bit specific register world switch
Allow registers specific to 32bit guests to be saved/restored
during the world switch.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:42:17 +01:00
Marc Zyngier 06c7654d2f arm64: KVM: CPU specific 32bit coprocessor access
Enable handling of CPU specific 32bit coprocessor access. Not much
here either.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:42:16 +01:00
Marc Zyngier 62a89c4495 arm64: KVM: 32bit handling of coprocessor traps
Provide the necessary infrastructure to trap coprocessor accesses that
occur when running 32bit guests.

Also wire SMC and HVC trapped in 32bit mode while were at it.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:42:16 +01:00
Marc Zyngier 27b190bd9f arm64: KVM: 32bit conditional execution emulation
As conditional instructions can trap on AArch32, add the thinest
possible emulation layer to keep 32bit guests happy.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:42:15 +01:00
Marc Zyngier b547631fc6 arm64: KVM: 32bit GP register access
Allow access to the 32bit register file through the usual API.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:42:14 +01:00
Marc Zyngier 40033a614e arm64: KVM: define 32bit specific registers
Define the 32bit specific registers (SPSRs, cp15...).

Most CPU registers are directly mapped to a 64bit register
(r0->x0...). Only the SPSRs have separate registers.

cp15 registers are also mapped into their 64bit counterpart in most
cases.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:42:13 +01:00
Marc Zyngier 6211753fdf arm64: KVM: Build system integration
Only the Makefile is plugged in. The Kconfig stuff is in a separate
patch to allow for an easier merge process.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:42:09 +01:00
Marc Zyngier dcd2e40c1e arm64: KVM: PSCI implementation
Wire the PSCI backend into the exit handling code.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:40:32 +01:00
Marc Zyngier 003300de6c arm64: KVM: Plug the arch timer
Add support for the in-kernel timer emulation.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:40:32 +01:00
Marc Zyngier 1f17f3b604 arm64: KVM: Plug the VGIC
Add support for the in-kernel GIC emulation.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:40:30 +01:00
Marc Zyngier c4b1afd022 arm64: KVM: Exit handling
Handle the exit of a VM, decoding the exit reason from HYP mode
and calling the corresponding handler.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:40:30 +01:00
Marc Zyngier 55c7401d92 arm64: KVM: HYP mode world switch implementation
The HYP mode world switch in all its glory.

Implements save/restore of host/guest registers, EL2 trapping,
IPA resolution, and additional services (tlb invalidation).

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-12 16:39:55 +01:00
Catalin Marinas d822d2a1e3 Introduce Xen support to ARM64
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.10 (GNU/Linux)
 
 iQIcBAABAgAGBQJRsbjNAAoJEIlPj0hw4a6Q3wYP/i6YVChCoYRhUWqWt4wRnw8I
 bWgwPXWwfc+nJLNP4nwp2ULro/f2hu0KOWZjl/HahPUKt88rD/e0y+bSb4nm4R2h
 /NzuMB3EllwAqeW7a1xOLzAB4y9h0t0iYVhg3joJ+sHaZk9hX3NZ2InmhniFCgaD
 cQFAXCPkpuLYxm9PClD/LCCx4UoZxz5BewM4DujSoK7jTcRFPyrivM/HLpgkgVXx
 1onHTzH4m0iS7INSD5A28tmUvk3G/TwomkO4C55Iu6l4fSUjegmGMmWQvk6cWBoz
 3UHI8YbG7pL4f/EKZAJdeK3Q/SaR1+V0q4IY+OJwPZUtBlNmXfCFUsljWqSw5kye
 LzhA4zmJOSYYr4g+wRE228IzxZsw8izvH/+bM/7gLcMJfd535tVoVYvxmMj5L9mh
 e1hb9AS4BvZNVzCyzb74x2NjscE55k9CgnK35DRSxr42Faap8c34Q43fYy2OWVX/
 4NfsH6NovQNmaxwTM4Y/G0c9zagFbTpxM4tuJvBqkc9eeuX22mHoGmzNQkXkGIA4
 cqjvgLNjqMnfFS9Wzf1lDIYwcxJFfCgukDaNFW28wLhXpj73hMW/maIlnuzjLEEA
 ZRA28VSaGGnxckYTBo0LBs5uW0Ef+la676cOp96O4Ei9AFHladej1p+sXKqIQZ0I
 xpyN01RtUy439hGKaNSx
 =uMi/
 -----END PGP SIGNATURE-----

Merge tag 'xen-arm64-3.1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/sstabellini/xen into upstream

Introduce Xen support to ARM64

* tag 'xen-arm64-3.1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/sstabellini/xen:
  MAINTAINERS: add myself as arm64/xen maintainer
  arm64/xen: introduce CONFIG_XEN and hypercall.S on ARM64
  arm64/xen: use XEN_IO_PROTO_ABI_ARM on ARM64
  arm64/xen: implement ioremap_cached on arm64
  arm64/xen: introduce asm/xen header files on arm64
  arm/xen: define xen_remap as ioremap_cached
2013-06-12 16:11:35 +01:00
Will Deacon 1442b6ed24 arm64: debug: consolidate software breakpoint handlers
The software breakpoint handlers are hooked in directly from ptrace,
which makes it difficult to add additional handlers for things like
kprobes and kgdb.

This patch moves the handling code into debug-monitors.c, where we can
dispatch to different debug subsystems more easily.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-12 11:23:02 +01:00
Will Deacon adace89562 arm64: extable: sort the exception table at build time
As is done for other architectures, sort the exception table at
build-time rather than during boot.

Since sortextable appears to be a standalone C program relying on the
host elf.h to provide EM_AARCH64, I've had to add a conditional check in
order to allow cross-compilation on machines that aren't running a
bleeding-edge libc-dev.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-12 11:23:01 +01:00
Will Deacon 73150c983a arm64: device: add iommu pointer to device archdata
When using an IOMMU for device mappings, it is necessary to keep a
pointer between the device and the IOMMU to which it is attached in
order to obtain the correct IOMMU when attaching the device to a domain.

This patch adds an iommu pointer to the dev_archdata structure, in a
similar manner to other architectures (ARM, PowerPC, x86, ...).

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-11 18:15:55 +01:00
Will Deacon 9ab6d02fdd arm64: pgtable: use pte_index instead of __pte_index
pte_index is a useful helper outside of arch/arm64, for things like the
ARM SMMU driver, so rename __pte_index to pte_index to be consistent
with both arch/arm/ and also the definitions of pmd_index and pgd_index.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-11 18:15:24 +01:00
Chen Gang 6916b14ea1 arm64: kernel: compiling issue, need delete read_current_timer()
Under arm64, we will calibrate the delay loop statically using a known
timer frequency, so delete read_current_timer(), or it will cause
compiling issue with allmodconfig.

The related error:
  ERROR: "read_current_timer" [lib/rbtree_test.ko] undefined!
  ERROR: "read_current_timer" [lib/interval_tree_test.ko] undefined!
  ERROR: "read_current_timer" [fs/ext4/ext4.ko] undefined!
  ERROR: "read_current_timer" [crypto/tcrypt.ko] undefined!

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-10 17:58:20 +01:00
Will Deacon 737c16dffc arm64: mm: don't bother invalidating the icache in switch_mm
We don't support software broadcast of cache maintenance operations, so
this flush is not required (__sync_icache_dcache will always affect all
CPUs).

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-07 18:00:11 +01:00
Catalin Marinas 4ecf7ccb19 arm64: spinlock: retry trylock operation if strex fails on free lock
An exclusive store instruction may fail for reasons other than lock
contention (e.g. a cache eviction during the critical section) so, in
line with other architectures using similar exclusive instructions
(alpha, mips, powerpc), retry the trylock operation if the lock appears
to be free but the strex reported failure.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Tony Thompson <anthony.thompson@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
2013-06-07 17:58:31 +01:00
Catalin Marinas ebd88367de arm64: Remove __flush_dcache_page()
This function is only used in __sync_icache_dcache(), so remove it and
call __flush_dcache_area() directly. The flush_icache_user_range()
function is not used in the arm64 kernel.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Will Deacon <will.deacon@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
2013-06-07 17:58:30 +01:00
Catalin Marinas 7249b79f6b arm64: Do not flush the D-cache for anonymous pages
The D-cache on AArch64 is VIPT non-aliasing, so there is no need to
flush it for anonymous pages.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Will Deacon <will.deacon@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
2013-06-07 17:58:29 +01:00
Catalin Marinas b5b6c9e914 arm64: Avoid cache flushing in flush_dcache_page()
The flush_dcache_page() function is called when the kernel modified a
page cache page. Since the D-cache on AArch64 does not have aliases
this function can simply mark the page as dirty for later flushing via
set_pte_at()/__sync_icache_dcache() if the page is executable (to ensure
the I-D cache coherency).

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Will Deacon <will.deacon@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
2013-06-07 17:58:28 +01:00
Damian Hobson-Garcia d25749afc6 arm64: Provide default implementation for dma_{alloc,free}_attrs
Most architectures that define CONFIG_HAS_DMA, have implementations for
both dma_alloc_attrs() and dma_free_attrs().  All achitectures that do
not define CONFIG_HAS_DMA also have both of these definitions provided
by dma-mapping-broken.h.

Add default implementations for these functions on arm64.

Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-07 17:57:23 +01:00
Marc Zyngier 092bd143cb arm64: KVM: hypervisor initialization code
Provide EL2 with page tables and stack, and set the vectors
to point to the full blown world-switch code.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:40 +01:00
Marc Zyngier 2f4a07c5f9 arm64: KVM: guest one-reg interface
Let userspace play with the guest registers.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:39 +01:00
Marc Zyngier d7246bf357 arm64: KVM: MMIO access backend
Define the necessary structures to perform an MMIO access.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:38 +01:00
Marc Zyngier 4f8d6632ec arm64: KVM: kvm_arch and kvm_vcpu_arch definitions
Provide the architecture dependent structures for VM and
vcpu abstractions.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:38 +01:00
Marc Zyngier f4672752c3 arm64: KVM: virtual CPU reset
Provide the reset code for a virtual CPU booted in 64bit mode.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:37 +01:00
Marc Zyngier b990a9d315 arm64: KVM: CPU specific system registers handling
Add the support code for CPU specific system registers. Not much
here yet.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:37 +01:00
Marc Zyngier 7c8c5e6a91 arm64: KVM: system register handling
Provide 64bit system register handling, modeled after the cp15
handling for ARM.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:36 +01:00
Marc Zyngier 54f81d0eb9 arm64: KVM: user space interface
Provide the kvm.h file that defines the user space visible
interface.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:35 +01:00
Marc Zyngier 37c437532b arm64: KVM: architecture specific MMU backend
Define the arm64 specific MMU backend:
- HYP/kernel VA offset
- S2 4/64kB definitions
- S2 page table populating and flushing
- icache cleaning

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:35 +01:00
Marc Zyngier aa8eff9bfb arm64: KVM: fault injection into a guest
Implement the injection of a fault (undefined, data abort or
prefetch abort) into a 64bit guest.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:34 +01:00
Marc Zyngier 83a4979483 arm64: KVM: Basic ESR_EL2 helpers and vcpu register access
Implements helpers for dealing with the EL2 syndrome register as
well as accessing the vcpu registers.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:34 +01:00
Marc Zyngier fd9fc9f73c arm64: KVM: system register definitions for 64bit guests
Define the saved/restored registers for 64bit guests.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:33 +01:00
Marc Zyngier 0369f6a34b arm64: KVM: EL2 register definitions
Define all the useful bitfields for EL2 registers.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:32 +01:00
Marc Zyngier 2240bbb697 arm64: KVM: HYP mode idmap support
Add the necessary infrastructure for identity-mapped HYP page
tables. Idmap-ed code must be in the ".hyp.idmap.text" linker
section.

The rest of the HYP ends up in ".hyp.text".

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:32 +01:00
Marc Zyngier 363116073a arm64: KVM: define HYP and Stage-2 translation page flags
Add HYP and S2 page flags, for both normal and device memory.

Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-06-07 14:03:31 +01:00
Stefano Stabellini aa42aa1389 arm64/xen: introduce CONFIG_XEN and hypercall.S on ARM64
Introduce CONFIG_XEN and the implementation of hypercall.S (that is
the only ARMv8 specific code in Xen support for ARM).

Compile enlighten.c and grant_table.c from arch/arm.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
2013-06-07 10:39:52 +00:00
Stefano Stabellini 22d4102f77 arm64/xen: implement ioremap_cached on arm64
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2013-06-07 10:39:50 +00:00
Stefano Stabellini 9f54ad6652 arm64/xen: introduce asm/xen header files on arm64
asm/xen/hypercall.h, asm/xen/hypervisor.h, asm/xen/interface.h and
asm/xen/page.h are identical so to avoid code duplication we are just
including the original arm header files here.

asm/xen/events.h is slightly different, so introduce a different file
here (use xchg to implement xchg_xen_ulong and pass regs->pstate to
raw_irqs_disabled_flags).

Also introduce asm/hypervisor.h and asm/sync_bitops.h.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
2013-06-07 10:39:45 +00:00
Mark Rutland 0d651e4e65 clocksource: arch_timer: use virtual counters
Switching between reading the virtual or physical counters is
problematic, as some core code wants a view of time before we're fully
set up. Using a function pointer and switching the source after the
first read can make time appear to go backwards, and having a check in
the read function is an unfortunate block on what we want to be a fast
path.

Instead, this patch makes us always use the virtual counters. If we're a
guest, or don't have hyp mode, we'll use the virtual timers, and as such
don't care about CNTVOFF as long as it doesn't change in such a way as
to make time appear to travel backwards. As the guest will use the
virtual timers, a (potential) KVM host must use the physical timers
(which can wake up the host even if they fire while a guest is
executing), and hence a host must have CNTVOFF set to zero so as to have
a consistent view of time between the physical timers and virtual
counters.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Rob Herring <rob.herring@calxeda.com>
2013-06-07 10:20:28 +01:00
Mark Rutland 9955ac47f4 arm64: don't kill the kernel on a bad esr from el0
Rather than completely killing the kernel if we receive an esr value we
can't deal with in the el0 handlers, send the process a SIGILL and log
the esr value in the hope that we can debug it. If we receive a bad esr
from el1, we'll die() as before.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: stable@vger.kernel.org
2013-05-31 16:04:51 +01:00
Mark Rutland 381cc2b970 arm64: treat unhandled compat el0 traps as undef
Currently, if a compat process reads or writes from/to a disabled
cp15/cp14 register, the trap is not handled by the el0_sync_compat
handler, and the kernel will head to bad_mode, where it will die(), and
oops(). For 64 bit processes, disabled system register accesses are
currently treated as unhandled instructions.

This patch modifies entry.S to treat these unhandled traps as undefined
instructions, sending a SIGILL to userspace. This gives processes a
chance to handle this and stop using inaccessible registers, and
prevents further issues in the kernel as a result of the die().

Reported-by: Johannes Jensen <Johannes.Jensen@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-05-31 16:04:44 +01:00
Michael S. Tsirkin 56d2ef789f arm64: uaccess s/might_sleep/might_fault/
The only reason uaccess routines might sleep
is if they fault. Make this explicit.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1369577426-26721-2-git-send-email-mst@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-05-28 09:41:06 +02:00
Catalin Marinas 953dbbed9e arm64: Do not report user faults for handled signals
Currently user faults (page, undefined instruction) are always reported
even though the user may have a signal handler for them. This patch adds
unhandled_signal() check together with printk_ratelimit() for these
cases.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-05-24 17:31:04 +01:00
Chen Gang 726dcaa158 arm64: kernel: compiling issue, need 'EXPORT_SYMBOL(clear_page)'
Need 'EXPORT_SYMBOL(clear_page)' if building with allmodconfig.

The related errors:
  ERROR: "clear_page" [fs/ocfs2/dlm/ocfs2_dlm.ko] undefined!
  ERROR: "clear_page" [fs/ntfs/ntfs.ko] undefined!
  ERROR: "clear_page" [fs/gfs2/gfs2.ko] undefined!
  ERROR: "clear_page" [fs/fuse/fuse.ko] undefined!
  ERROR: "clear_page" [fs/ext3/ext3.ko] undefined!
  ERROR: "clear_page" [fs/ext2/ext2.ko] undefined!
  ERROR: "clear_page" [fs/exofs/libore.ko] undefined!
  ERROR: "clear_page" [fs/exofs/exofs.ko] undefined!
  ERROR: "clear_page" [drivers/block/brd.ko] undefined!

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-05-24 17:31:03 +01:00
Will Deacon 3126976be6 arm64: debug: fix mdscr.ss check when enabling debug exceptions
When we take an exception at EL1, we only want to enable debug
exceptions if we're not currently stepping, otherwise we can easily get
stuck in a loop stepping into interrupt handlers.

Unfortunately, the current code tests the wrong bit in the mdscr, so fix
that.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-05-17 18:24:19 +01:00
Catalin Marinas 02e3cba685 arm64: Do not source kernel/time/Kconfig explicitly
As per commit 764e0da1 (timers: Fixup the Kconfig consolidation
fallout), init/Kconfig already includes kernel/time/Kconfig, so no need
to do it explicitly for arm64.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-05-14 15:44:51 +01:00
Sukanto Ghosh b4fed07968 arm64: mm: Fix operands of clz in __flush_dcache_all
The format of the lower 32-bits of the 64-bit operand to 'dc cisw' is
unchanged from ARMv7 architecture and the upper bits are RES0. This
implies that the 'way' field of the operand of 'dc cisw' occupies the
bit-positions [31 .. (32-A)]. Due to the use of 64-bit extended operands
to 'clz', the existing implementation of __flush_dcache_all is incorrectly
placing the 'way' field in the bit-positions [63 .. (64-A)].

Signed-off-by: Sukanto Ghosh <sghosh@apm.com>
Tested-by: Anup Patel <anup.patel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: stable@vger.kernel.org
2013-05-14 15:44:50 +01:00
Catalin Marinas c560ecfe96 arm64: Invoke the of_platform_populate() at arch_initcall() level
The of_platform_populate() is currently invoked at device_initcall()
level. There are however drivers that use platform_driver_probe()
directly and they need the devices to be populated. This patch makes the
of_platform_populate() and arch_initcall().

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Benoit Lecardonnel <Benoit.Lecardonnel@synopsys.com>
Tested-by: Benoit Lecardonnel <Benoit.Lecardonnel@synopsys.com>
2013-05-14 15:44:46 +01:00
Will Deacon 9c413e25d9 arm64: debug: clear mdscr_el1 instead of taking the OS lock
During boot, we take the debug OS lock before interrupts are enabled.
This is required to prevent clearing of PSTATE.D on the interrupt entry
path, which could result in spurious debug exceptions before we've got
round to resetting things like the hardware breakpoints registers to a
sane state.

A problem with this approach is that taking the OS lock prevents an
external JTAG debugger from debugging the system, which is especially
irritating during boot, where JTAG debugging can be most useful.

This patch clears mdscr_el1 rather than taking the lock, clearing the
MDE and KDE bits and preventing self-hosted hardware debug exceptions
from occurring.

Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: stable@vger.kernel.org
2013-05-13 11:44:56 +01:00
Chen Gang 182a6f73ec arm64: Fix duplicate definition of early_console
When compiling with allmodconfig. early_console is already defined as an
extern global pointer. Need let it point to the object which we intend
to (like arm32 done).

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-05-13 11:44:53 +01:00
Linus Torvalds 3644bc2ec7 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull stray syscall bits from Al Viro:
 "Several syscall-related commits that were missing from the original"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal:
  switch compat_sys_sysctl to COMPAT_SYSCALL_DEFINE
  unicore32: just use mmap_pgoff()...
  unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE
  x86, vm86: fix VM86 syscalls: use SYSCALL_DEFINEx(...)
2013-05-10 09:21:05 -07:00
Al Viro 91c2e0bcae unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-05-09 13:46:38 -04:00
Linus Torvalds 5647ac0ad4 Removal of GENERIC_GPIO for v3.10
GENERIC_GPIO now synonymous with GPIOLIB. There are no longer any valid
 cases for enableing GENERIC_GPIO without GPIOLIB, even though it is
 possible to do so which has been causing confusion and breakage. This
 branch does the work to completely eliminate GENERIC_GPIO.
 
 However, it is not trivial to just create a branch to remove it. Over
 the course of the v3.9 cycle more code referencing GENERIC_GPIO has been
 added to linux-next that conflicts with this branch. The following must
 be done to resolve the conflicts when merging this branch into mainline:
 
 * "git grep CONFIG_GENERIC_GPIO" should return 0 hits. Matches should be
   replaced with CONFIG_GPIOLIB
 * "git grep '\bGENERIC_GPIO\b'" should return 1 hit in the Chinese
   documentation.
 * Selectors of GENERIC_GPIO should be turned into selectors of GPIOLIB
 * definitions of the option in architecture Kconfig code should be deleted.
 
 Stephen has 3 merge fixup patches[1] that do the above. They are currently
 applicable on mainline as of May 2nd.
 
 [1] http://www.mail-archive.com/linux-kernel@vger.kernel.org/msg428056.html
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJRifUnAAoJEEFnBt12D9kBs2YP/0U6+ia+xYvkVaJc28PDVIzn
 OReZNcJOYU8D5voxz0voaRD0EdcPwjbMu9Kp9aXMHlk4VxevF+8jCc/us0bIjtO1
 VcB5VmSCIhMhxdnBlum11Mk7Vr5MCweyl9NBsypnPt8cl4obMBZHf2yzoodFktNb
 wtyYlOb6FALtc6iDbOO6dG3w9F7FAOLvskUFzdv89m8mupTsBu9jw9NqFDbJHOex
 rxq0Sdd+kWF/nkJVcV5Y6jIdletRlhpipefMJ9diexreHvwqh+c4kJEYZaXgB5+m
 ha95cPbReK1d+RqzM3A8d4irzSVSmq4k7ijI6QkFOr48+AH7XsgKv5so885LKzMN
 IIXg2Phm9i0H8+ecEvhcc4oIYBHJiEKK54Y0qUD9dqbFoDGPTCSqMHdSSMbpAY+J
 bIIXlVzj1En3PPNUJLPt8q8Qz6WxCT9mDST3QSGYnD4o90HT+1R9j92RxGL6McOq
 rUOyJDwmzFvpBvKK4raGdOU435M+ps2NPKKNIRaIGQPPY9rM1kN4YqvhXukEsC9L
 3a3+3cQLh7iKxBHncxeQsJfethP1CPkJnzvF9r+ZZLf2rcPH4pbQIE2uO0XnX/nd
 5/DKi0nGgAJ//GMMzdo3RiOA5zGFjIZ/KMvfhQldpP6qFJRhqdGi6FPlAcwr1z1n
 YnCByPwwlvfC4LTXFOGL
 =xodc
 -----END PGP SIGNATURE-----

Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux

Pull removal of GENERIC_GPIO from Grant Likely:
 "GENERIC_GPIO now synonymous with GPIOLIB.  There are no longer any
  valid cases for enableing GENERIC_GPIO without GPIOLIB, even though it
  is possible to do so which has been causing confusion and breakage.
  This branch does the work to completely eliminate GENERIC_GPIO."

* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux:
  gpio: update gpio Chinese documentation
  Remove GENERIC_GPIO config option
  Convert selectors of GENERIC_GPIO to GPIOLIB
  blackfin: force use of gpiolib
  m68k: coldfire: use gpiolib
  mips: pnx833x: remove requirement for GENERIC_GPIO
  openrisc: default GENERIC_GPIO to false
  avr32: default GENERIC_GPIO to false
  xtensa: remove explicit selection of GENERIC_GPIO
  sh: replace CONFIG_GENERIC_GPIO by CONFIG_GPIOLIB
  powerpc: remove redundant GENERIC_GPIO selection
  unicore32: default GENERIC_GPIO to false
  unicore32: remove unneeded select GENERIC_GPIO
  arm: plat-orion: use GPIO driver on CONFIG_GPIOLIB
  arm: remove redundant GENERIC_GPIO selection
  mips: alchemy: require gpiolib
  mips: txx9: change GENERIC_GPIO to GPIOLIB
  mips: loongson: use GPIO driver on CONFIG_GPIOLIB
  mips: remove redundant GENERIC_GPIO select
2013-05-09 09:59:16 -07:00
Linus Torvalds 3d15b798ea - Since drivers/irqchip/irq-gic.c no longer has dependencies on arm32
specifics (the 'gic' branch merged), it can be enabled on arm64.
 - Enable arm64 support for poweroff/restart (for code under
   drivers/power/reset/).
 - Fixes (dts file, exception handling, bitops)
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJRijNyAAoJEGvWsS0AyF7x+McP/1ckDkp5Bz5vOI+3cY7kaDxs
 P11k7bDhwv4Xiucxlgk0D2C9xJlQRwknXjR4DRvdluFF0XE9/ZrM6PE96jQLZzh+
 NNQXdD6sYxj6l5UJxymDsxP+5ZMdYCOUmNI6iC+vMrrvfXGNA4QgFBjldsAFINFu
 CFQu9Xke1JXy0TvP9QDYCVDzT025rjxuQCzAr3MShy7dPZEkavtBHqfCVg0qz6LN
 lTmX/mh66KT2M5NrQiMAfuBlwIy/cX8ahOk5znLJo2kekZz5BvehYIPswADNU3K+
 rZkZ1hsaQzDA5XHRw/NFcMr/5mDXVxQ9TG555kB5uBsT0dp3kTpCItmHxzVCp6YG
 2TUgXG7qz/EecFf2CtjuvPwGy+cyT62ROOAGBxWZitwe9kXuPvim+sF2xJZvf7ak
 +z7W75xrWZinGiw5WlKoGt4FNwyGloU5LO0NC61AXJo4cUpHUIjGHiYHGi9ft9UQ
 33BNZdPcbwQ1CQhTsayzrzG2mFR1NrBIr0TzJLzARn13rAtFx1Ay8qRIe+b0D1uZ
 zPP0sdydYdYUQm/Dj7gj5zl8sgj5E3szYVlqgOaMMqxw7d+J2iHH+CVaJehFDO/g
 scmYBmt1mlENgaNaa+8VXWcQH8oo7KLb0F3gaUnYpybM+u4fiM/UoVTsX0pC4GGH
 Gl+tuKc7FC7yaXMdzhKU
 =qd94
 -----END PGP SIGNATURE-----

Merge tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull arm64 update from Catalin Marinas:

 - Since drivers/irqchip/irq-gic.c no longer has dependencies on arm32
   specifics (the 'gic' branch merged), it can be enabled on arm64.

 - Enable arm64 support for poweroff/restart (for code under
   drivers/power/reset/).

 - Fixes (dts file, exception handling, bitops)

* tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: Treat the bitops index argument as an 'int'
  arm64: Ignore the 'write' ESR flag on cache maintenance faults
  arm64: dts: fix #address-cells for foundation-v8
  arm64: vexpress: Add support for poweroff/restart
  arm64: Enable support for the ARM GIC interrupt controller
2013-05-08 15:15:27 -07:00
Catalin Marinas 420c158dcf arm64: Treat the bitops index argument as an 'int'
The bitops prototype use an 'int' as the bit index type but the asm
implementation assume it to be a 'long'. Since the compiler does not
guarantee zeroing the upper 32-bits in a register when used as 'int',
change the bitops implementation accordingly.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-05-08 10:33:17 +01:00
Catalin Marinas 0e7f7bcc3f arm64: Ignore the 'write' ESR flag on cache maintenance faults
ESR.WnR bit is always set on data cache maintenance faults even though
the page is not required to have write permission. If a translation
fault (page not yet mapped) happens for read-only user address range,
Linux incorrectly assumes a permission fault. This patch adds the check
of the ESR.CM bit during the page fault handling to ignore the 'write'
flag.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Tim Northover <Tim.Northover@arm.com>
Cc: stable@vger.kernel.org
2013-05-08 10:33:16 +01:00
Mark Rutland ed1f23637a arm64: dts: fix #address-cells for foundation-v8
Commit 90556ca1 ("arm64: vexpress: Add dts files for the ARMv8 RTSM
models") added foundation-v8.dts, but erroneously set
/cpus/#address-cells = <1> while providing two cells in each cpus/cpu@N
node's reg property.

As of commit ea393a2e ("arm64: smp: honour #address-size when parsing
CPU reg property") we read in as many address cells as specified rather
than always reading two. This means that for foundation-v8.dts, we only
read the first reg cell (zero) for each cpu node, and receive a lot of
warnings at boot of the form "/cpus/cpu@1: duplicate cpu reg properties
in the DT".

This patch corrects foundation-v8.dts to have the correct value for
/cpus/#address-cells.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Tested-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-05-08 10:23:01 +01:00
Catalin Marinas aa1e8ec1d2 arm64: vexpress: Add support for poweroff/restart
This patch adds the arm_pm_poweroff definition expected by the
vexpress-poweroff.c driver and enables the latter for arm64.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Pawel Moll <pawel.moll@arm.com>
2013-05-08 10:23:00 +01:00
Catalin Marinas c4188edc9e arm64: Enable support for the ARM GIC interrupt controller
This patch enables ARM_GIC on the arm64 kernel.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-05-08 10:22:59 +01:00
Linus Torvalds 1bf25e78af ARM: arm-soc: late cleanups
These are cleanups and smaller changes that either depend on earlier
 feature branches or came in late during the development cycle.
 We normally try to get all cleanups early, so these are the exceptions:
 
 - A follow-up on the clocksource reworks, hopefully the last time
   we need to merge clocksource subsystem changes through arm-soc.
   A first set of patches was part of the original 3.10 arm-soc cleanup
   series because of interdependencies with timer drivers now moved out
   of arch/arm.
 
 - Migrating the SPEAr13xx platform away from using auxdata for DMA
   channel descriptions towards using information in device tree,
   based on the earlier SPEAr multiplatform series
 
 - A few follow-ups on the Atmel SAMA5 support and other changes
   for Atmel at91 based on the larger at91 reworks.
 
 - Moving the armada irqchip implementation to drivers/irqchip
 
 - Several OMAP cleanups following up on the larger series already
   merged in 3.10.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIVAwUAUYj5U2CrR//JCVInAQLNIRAAvsCtYOmXTxkRBxdtNEUUbkEjx71Se7q0
 h9PR8vqlkbYwONkJ8a6j8pKq/WJDmLpHQWg/moBsvlGc6uEVBPBFhCWHs1+yGUzX
 GhnJOaIKh3+651hIoXccS+/YZ16e1EAzdCM7+1QegPTldsRGkTOiwXgmR51kmPrz
 6cZ8P5MFqMrWIy4XqWhOBbMDCY/An05IHMpniGIamUg2/uB921Z0wNFvDrnsg97u
 DsVEwimyCJ0j7aO4TH+fkvsjoGWnIhxPtpaIm8iff6TPRI49deRb3zYpnIONm+oG
 /cQrRf3BNW+aiTuRCTEjdBNGtcrYgN6CLWWjzgMhv1itSlX8swBcOhuNJRCGNQRI
 v3wL4aEBxUpPGGL8erc2GIW7pe29YC2UEYI2z1X/5MEzYO589zkkG2k+/3HQVUwp
 dnYpQxhjRMvh4mcodBJFRjzH1Z7agKUwtoKalAHRRH7r5gJDkpL3zLoMhYPTG5IZ
 OwU+aYf+dDxh2kKW0zs8a/qL97UTHjlTRUC9LPoumvJ7LlKeDfzEn7DHUm2gggiu
 dO9ye/NF/xEXoDXTl0Qp2wJ6/sbPSLyCYCIMdP/gJjWUiDDqqZ0VRaKL7vE/JWrd
 NJ7k5yunX8/kRgfqgRFLDdFnPj1JeYHlmexsq4l9TPbPstoIcbw8u1v9sr8aZF+Z
 agh9u4e7QU8=
 =HWfp
 -----END PGP SIGNATURE-----

Merge tag 'cleanup-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC late cleanups from Arnd Bergmann:
 "These are cleanups and smaller changes that either depend on earlier
  feature branches or came in late during the development cycle.  We
  normally try to get all cleanups early, so these are the exceptions:

   - A follow-up on the clocksource reworks, hopefully the last time we
     need to merge clocksource subsystem changes through arm-soc.

     A first set of patches was part of the original 3.10 arm-soc
     cleanup series because of interdependencies with timer drivers now
     moved out of arch/arm.

   - Migrating the SPEAr13xx platform away from using auxdata for DMA
     channel descriptions towards using information in device tree,
     based on the earlier SPEAr multiplatform series

   - A few follow-ups on the Atmel SAMA5 support and other changes for
     Atmel at91 based on the larger at91 reworks.

   - Moving the armada irqchip implementation to drivers/irqchip

   - Several OMAP cleanups following up on the larger series already
     merged in 3.10."

* tag 'cleanup-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (50 commits)
  ARM: OMAP4: change the device names in usb_bind_phy
  ARM: OMAP2+: Fix mismerge for timer.c between ff931c82 and da4a686a
  ARM: SPEAr: conditionalize SMP code
  ARM: arch_timer: Silence debug preempt warnings
  ARM: OMAP: remove unused variable
  serial: amba-pl011: fix !CONFIG_DMA_ENGINE case
  ata: arasan: remove the need for platform_data
  ARM: at91/sama5d34ek.dts: remove not needed compatibility string
  ARM: at91: dts: add MCI DMA support
  ARM: at91: dts: add i2c dma support
  ARM: at91: dts: set #dma-cells to the correct value
  ARM: at91: suspend both memory controllers on at91sam9263
  irqchip: armada-370-xp: slightly cleanup irq controller driver
  irqchip: armada-370-xp: move IRQ handler to avoid forward declaration
  irqchip: move IRQ driver for Armada 370/XP
  ARM: mvebu: move L2 cache initialization in init_early()
  devtree: add binding documentation for sp804
  ARM: integrator-cp: convert use CLKSRC_OF for timer init
  ARM: versatile: use OF init for sp804 timer
  ARM: versatile: add versatile dtbs to dtbs target
  ...
2013-05-07 11:22:14 -07:00
Linus Torvalds 08d7676083 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull compat cleanup from Al Viro:
 "Mostly about syscall wrappers this time; there will be another pile
  with patches in the same general area from various people, but I'd
  rather push those after both that and vfs.git pile are in."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal:
  syscalls.h: slightly reduce the jungles of macros
  get rid of union semop in sys_semctl(2) arguments
  make do_mremap() static
  sparc: no need to sign-extend in sync_file_range() wrapper
  ppc compat wrappers for add_key(2) and request_key(2) are pointless
  x86: trim sys_ia32.h
  x86: sys32_kill and sys32_mprotect are pointless
  get rid of compat_sys_semctl() and friends in case of ARCH_WANT_OLD_COMPAT_IPC
  merge compat sys_ipc instances
  consolidate compat lookup_dcookie()
  convert vmsplice to COMPAT_SYSCALL_DEFINE
  switch getrusage() to COMPAT_SYSCALL_DEFINE
  switch epoll_pwait to COMPAT_SYSCALL_DEFINE
  convert sendfile{,64} to COMPAT_SYSCALL_DEFINE
  switch signalfd{,4}() to COMPAT_SYSCALL_DEFINE
  make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect
  make HAVE_SYSCALL_WRAPPERS unconditional
  consolidate cond_syscall and SYSCALL_ALIAS declarations
  teach SYSCALL_DEFINE<n> how to deal with long long/unsigned long long
  get rid of duplicate logics in __SC_....[1-6] definitions
2013-05-01 07:21:43 -07:00
Tejun Heo a43cb95d54 dump_stack: unify debug information printed by show_regs()
show_regs() is inherently arch-dependent but it does make sense to print
generic debug information and some archs already do albeit in slightly
different forms.  This patch introduces a generic function to print debug
information from show_regs() so that different archs print out the same
information and it's much easier to modify what's printed.

show_regs_print_info() prints out the same debug info as dump_stack()
does plus task and thread_info pointers.

* Archs which didn't print debug info now do.

  alpha, arc, blackfin, c6x, cris, frv, h8300, hexagon, ia64, m32r,
  metag, microblaze, mn10300, openrisc, parisc, score, sh64, sparc,
  um, xtensa

* Already prints debug info.  Replaced with show_regs_print_info().
  The printed information is superset of what used to be there.

  arm, arm64, avr32, mips, powerpc, sh32, tile, unicore32, x86

* s390 is special in that it used to print arch-specific information
  along with generic debug info.  Heiko and Martin think that the
  arch-specific extra isn't worth keeping s390 specfic implementation.
  Converted to use the generic version.

Note that now all archs print the debug info before actual register
dumps.

An example BUG() dump follows.

 kernel BUG at /work/os/work/kernel/workqueue.c:4841!
 invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
 Modules linked in:
 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #7
 Hardware name: empty empty/S3992, BIOS 080011  10/26/2007
 task: ffff88007c85e040 ti: ffff88007c860000 task.ti: ffff88007c860000
 RIP: 0010:[<ffffffff8234a07e>]  [<ffffffff8234a07e>] init_workqueues+0x4/0x6
 RSP: 0000:ffff88007c861ec8  EFLAGS: 00010246
 RAX: ffff88007c861fd8 RBX: ffffffff824466a8 RCX: 0000000000000001
 RDX: 0000000000000046 RSI: 0000000000000001 RDI: ffffffff8234a07a
 RBP: ffff88007c861ec8 R08: 0000000000000000 R09: 0000000000000000
 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8234a07a
 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 FS:  0000000000000000(0000) GS:ffff88007dc00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
 CR2: ffff88015f7ff000 CR3: 00000000021f1000 CR4: 00000000000007f0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
 Stack:
  ffff88007c861ef8 ffffffff81000312 ffffffff824466a8 ffff88007c85e650
  0000000000000003 0000000000000000 ffff88007c861f38 ffffffff82335e5d
  ffff88007c862080 ffffffff8223d8c0 ffff88007c862080 ffffffff81c47760
 Call Trace:
  [<ffffffff81000312>] do_one_initcall+0x122/0x170
  [<ffffffff82335e5d>] kernel_init_freeable+0x9b/0x1c8
  [<ffffffff81c47760>] ? rest_init+0x140/0x140
  [<ffffffff81c4776e>] kernel_init+0xe/0xf0
  [<ffffffff81c6be9c>] ret_from_fork+0x7c/0xb0
  [<ffffffff81c47760>] ? rest_init+0x140/0x140
  ...

v2: Typo fix in x86-32.

v3: CPU number dropped from show_regs_print_info() as
    dump_stack_print_info() has been updated to print it.  s390
    specific implementation dropped as requested by s390 maintainers.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>		[tile bits]
Acked-by: Richard Kuo <rkuo@codeaurora.org>		[hexagon bits]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-30 17:04:02 -07:00
Tejun Heo 196779b9b4 dump_stack: consolidate dump_stack() implementations and unify their behaviors
Both dump_stack() and show_stack() are currently implemented by each
architecture.  show_stack(NULL, NULL) dumps the backtrace for the
current task as does dump_stack().  On some archs, dump_stack() prints
extra information - pid, utsname and so on - in addition to the
backtrace while the two are identical on other archs.

The usages in arch-independent code of the two functions indicate
show_stack(NULL, NULL) should print out bare backtrace while
dump_stack() is used for debugging purposes when something went wrong,
so it does make sense to print additional information on the task which
triggered dump_stack().

There's no reason to require archs to implement two separate but mostly
identical functions.  It leads to unnecessary subtle information.

This patch expands the dummy fallback dump_stack() implementation in
lib/dump_stack.c such that it prints out debug information (taken from
x86) and invokes show_stack(NULL, NULL) and drops arch-specific
dump_stack() implementations in all archs except blackfin.  Blackfin's
dump_stack() does something wonky that I don't understand.

Debug information can be printed separately by calling
dump_stack_print_info() so that arch-specific dump_stack()
implementation can still emit the same debug information.  This is used
in blackfin.

This patch brings the following behavior changes.

* On some archs, an extra level in backtrace for show_stack() could be
  printed.  This is because the top frame was determined in
  dump_stack() on those archs while generic dump_stack() can't do that
  reliably.  It can be compensated by inlining dump_stack() but not
  sure whether that'd be necessary.

* Most archs didn't use to print debug info on dump_stack().  They do
  now.

An example WARN dump follows.

 WARNING: at kernel/workqueue.c:4841 init_workqueues+0x35/0x505()
 Hardware name: empty
 Modules linked in:
 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #9
  0000000000000009 ffff88007c861e08 ffffffff81c614dc ffff88007c861e48
  ffffffff8108f50f ffffffff82228240 0000000000000040 ffffffff8234a03c
  0000000000000000 0000000000000000 0000000000000000 ffff88007c861e58
 Call Trace:
  [<ffffffff81c614dc>] dump_stack+0x19/0x1b
  [<ffffffff8108f50f>] warn_slowpath_common+0x7f/0xc0
  [<ffffffff8108f56a>] warn_slowpath_null+0x1a/0x20
  [<ffffffff8234a071>] init_workqueues+0x35/0x505
  ...

v2: CPU number added to the generic debug info as requested by s390
    folks and dropped the s390 specific dump_stack().  This loses %ksp
    from the debug message which the maintainers think isn't important
    enough to keep the s390-specific dump_stack() implementation.

    dump_stack_print_info() is moved to kernel/printk.c from
    lib/dump_stack.c.  Because linkage is per objecct file,
    dump_stack_print_info() living in the same lib file as generic
    dump_stack() means that archs which implement custom dump_stack()
    - at this point, only blackfin - can't use dump_stack_print_info()
    as that will bring in the generic version of dump_stack() too.  v1
    The v1 patch broke build on blackfin due to this issue.  The build
    breakage was reported by Fengguang Wu.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>	[s390 bits]
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Richard Kuo <rkuo@codeaurora.org>		[hexagon bits]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-30 17:04:02 -07:00
Linus Torvalds c9ef713993 Main features:
- Versatile Express SoC (model) support - DT files and Kconfig entries
   (there are no arch/arm64/mach-* directories). The bulk of the code has
   already been moved to drivers/ as part of the ARM SoC clean-up.
 - Basic multi-cluster support (CPU logical map initialised from the DT).
 - Simple earlyprintk support for UART 8250/16550 and FastModel console
   output.
 - Optimised kernel library bitops and string functions.
 - Automatic initialisation of the irqchip and clocks via DT.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJRf+a/AAoJEGvWsS0AyF7x4cAP/199we5Q3IvXnOiyoiJSwk/v
 FJ8i+B/cICd8LiSRhpUkDYDWboBWq+LkG+SxmhPGjvWp0GXt6RFgSuT7okQrQy4l
 a3UpRNLAc7HRamehreWqdIXuD1JwkrUwRC5hxVjQBrI0Q2JeQgEbghtFwiK2qRAg
 yLo9PPRfrBHq3jEJXhaiHyb/oQm9jNUbgJ5KSes6gjgwBtnsATiaSyLe5FbZqzIV
 aYPKblFMUjR38TQE7uAxWtA8hPDG558dkiBJfs1GHRtkGt7odrEvAdscxw0mjDSd
 rvP+XW8URVDYUhZVSaDKB8z4l436jCSAg3GYCWf/CC+sQDdxBBa1Lp5ADg/xQLrh
 L+oICtDeX3v3LGhGs0x4RG4hdvyCATyHI+P/bIKA9sWUWbKTTCqEQahG0puyiun+
 7nB89xGKZDIcy7yc+2UivHXIsTIRXETLmEFDKciit3f7ua4maoIvJ8oOHkJaPJRQ
 imWRRg1BVMvq3L1IPCwuoIirasXzcrAkONw5Gw5ZHKVps0+xarNd4T/RWp1rmjXt
 R4ZdgWNMyC3PHoP7CwG9h7Ia4CUYuaxqnmWQRALrHahr1Cxb/rnU98xadjkkBTwX
 Xh1b6fdz4yKXgVBiirfPPRA3xjSYJkwEBqFwO5IAPhYulUw10U56+K0I77ixYQ8G
 IDtjzKiHu/P05Nwncgn6
 =Uvte
 -----END PGP SIGNATURE-----

Merge tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull arm64 update from Catalin Marinas:
 "Main features:

   - Versatile Express SoC (model) support - DT files and Kconfig
     entries (there are no arch/arm64/mach-* directories).  The bulk of
     the code has already been moved to drivers/ as part of the ARM SoC
     clean-up.

   - Basic multi-cluster support (CPU logical map initialised from the
     DT)

   - Simple earlyprintk support for UART 8250/16550 and FastModel
     console output

   - Optimised kernel library bitops and string functions.

   - Automatic initialisation of the irqchip and clocks via DT"

* tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: (26 commits)
  arm64: Use acquire/release semantics instead of explicit DMB
  arm64: klib: bitops: fix unpredictable stxr usage
  arm64: vexpress: Enable ARMv8 RTSM model (SoC) support
  arm64: vexpress: Add dts files for the ARMv8 RTSM models
  arm64: Survive invalid cpu enable-methods
  arm64: mm: Correct show_pte behaviour
  arm64: Fix compat types affecting struct compat_stat
  arm64: Execute DSB during thread switching for TLB/cache maintenance
  arm64: compiling issue, need add include/asm/vga.h file
  arm64: smp: honour #address-size when parsing CPU reg property
  arm64: Define cmpxchg64 and cmpxchg64_local for outside use
  arm64: Define readq and writeq for driver module using
  arm64: Fix task tracing
  arm64: add explicit symbols to ESR_EL1 decoding
  arm64: Use irqchip_init() for interrupt controller initialisation
  arm64: psci: Use the MPIDR values from cpu_logical_map for cpu ids.
  arm64: klib: Optimised atomic bitops
  arm64: klib: Optimised string functions
  arm64: klib: Optimised memory functions
  arm64: head: match all affinity levels in the pen of the secondaries
  ...
2013-04-30 10:10:48 -07:00
Catalin Marinas 16c85a1fd7 arm64: Use acquire/release semantics instead of explicit DMB
This patch changes the test_and_*_bit functions to use the
load-acquire/store-release instructions instead of explicit DMB.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-04-30 15:58:37 +01:00
Mark Rutland c47d6a04e6 arm64: klib: bitops: fix unpredictable stxr usage
We're currently relying on unpredictable behaviour in our testops
(test_and_*_bit), as stxr is unpredictable when the status register and
the source register are the same

This patch changes reallocates the status register so as to bring us back into
the realm of predictable behaviour. Boot tested on an AEMv8 model.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-04-30 15:53:01 +01:00
Linus Torvalds 8700c95adb Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull SMP/hotplug changes from Ingo Molnar:
 "This is a pretty large, multi-arch series unifying and generalizing
  the various disjunct pieces of idle routines that architectures have
  historically copied from each other and have grown in random, wildly
  inconsistent and sometimes buggy directions:

   101 files changed, 455 insertions(+), 1328 deletions(-)

  this went through a number of review and test iterations before it was
  committed, it was tested on various architectures, was exposed to
  linux-next for quite some time - nevertheless it might cause problems
  on architectures that don't read the mailing lists and don't regularly
  test linux-next.

  This cat herding excercise was motivated by the -rt kernel, and was
  brought to you by Thomas "the Whip" Gleixner."

* 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits)
  idle: Remove GENERIC_IDLE_LOOP config switch
  um: Use generic idle loop
  ia64: Make sure interrupts enabled when we "safe_halt()"
  sparc: Use generic idle loop
  idle: Remove unused ARCH_HAS_DEFAULT_IDLE
  bfin: Fix typo in arch_cpu_idle()
  xtensa: Use generic idle loop
  x86: Use generic idle loop
  unicore: Use generic idle loop
  tile: Use generic idle loop
  tile: Enter idle with preemption disabled
  sh: Use generic idle loop
  score: Use generic idle loop
  s390: Use generic idle loop
  powerpc: Use generic idle loop
  parisc: Use generic idle loop
  openrisc: Use generic idle loop
  mn10300: Use generic idle loop
  mips: Use generic idle loop
  microblaze: Use generic idle loop
  ...
2013-04-30 07:50:17 -07:00
Johannes Weiner 0aad818b2d sparse-vmemmap: specify vmemmap population range in bytes
The sparse code, when asking the architecture to populate the vmemmap,
specifies the section range as a starting page and a number of pages.

This is an awkward interface, because none of the arch-specific code
actually thinks of the range in terms of 'struct page' units and always
translates it to bytes first.

In addition, later patches mix huge page and regular page backing for
the vmemmap.  For this, they need to call vmemmap_populate_basepages()
on sub-section ranges with PAGE_SIZE and PMD_SIZE in mind.  But these
are not necessarily multiples of the 'struct page' size and so this unit
is too coarse.

Just translate the section range into bytes once in the generic sparse
code, then pass byte ranges down the stack.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Ben Hutchings <ben@decadent.org.uk>
Cc: Bernhard Schmidt <Bernhard.Schmidt@lrz.de>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: David S. Miller <davem@davemloft.net>
Tested-by: David S. Miller <davem@davemloft.net>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29 15:54:35 -07:00
Jiang Liu 83db0384a9 mm/ARM: use common help functions to free reserved pages
Use common help functions to free reserved pages.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29 15:54:29 -07:00
Catalin Marinas 1ae90e7905 arm64: vexpress: Enable ARMv8 RTSM model (SoC) support
This patch adds the necessary Kconfig entries to enable support for the
ARMv8 software model (Versatile Express platform) together with the
defconfig update.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2013-04-26 14:44:05 +01:00
Pawel Moll 90556ca1eb arm64: vexpress: Add dts files for the ARMv8 RTSM models
This patch adds the DTS files for the ARMv8 RTSM and Foundation models.

Signed-off-by: Pawel Moll <Pawel.Moll@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2013-04-26 14:32:03 +01:00
Mark Rutland 39a90ca639 arm64: Survive invalid cpu enable-methods
Currently, if you pass the kernel a dtb where a cpu node has an
unsupported enable-method property (e.g. "not-psci"), it'll explode
horribly, as it iterates over the enable_ops array incorrectly. It
increments the pointer *at* the current element, rather than
incrementing the pointer *to* the current element. As the first two
elements pointed to structures that were contiguous in memory, this
happened to be equivalent. However the third element is NULL, so when
the list is exhausted, smp_get_enable_ops generates the wrong pointer,
and dereferences an arbitrary portion of memory, which currently happens
to contain zero.

This patch fixes this by indirecting the pointer one level, so we
iterate over the array elements correctly, avoiding the below panic:

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-04-25 17:45:54 +01:00
Steve Capper 4339e3f389 arm64: mm: Correct show_pte behaviour
show_pte makes use of the *_none_or_clear_bad style functions. If a
pgd, pud or pmd is identified as being bad, it will then be cleared.

As show_pte appears to be called from either the user or kernel
fault handlers this side effect can lead to unpredictable behaviour;
especially as TLB entries are not invalidated.

This patch removes the page table sanitisation from show_pte. If a
bad pgd, pud or pmd is encountered it is left unmodified.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-04-25 17:45:52 +01:00
Catalin Marinas f15a2a12d0 arm64: Fix compat types affecting struct compat_stat
The compat_stat structure doesn't match the arch/arm/ struct stat
definition. This patch fixes the compat types and struct compat_stat
definition accordingly.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
2013-04-25 17:45:50 +01:00
Catalin Marinas 5108c67c37 arm64: Execute DSB during thread switching for TLB/cache maintenance
The DSB following TLB or cache maintenance ops must be run on the same
CPU. With kernel preemption enabled or for user-space cache maintenance
this may not be the case. This patch adds an explicit DSB in the
__switch_to() function.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-04-25 17:45:48 +01:00
Chen Gang 4b3ea2e04d arm64: compiling issue, need add include/asm/vga.h file
For compiling with allmodconfig, need vga.h file, so generate it which
just only include the asm-generic one.

It is firstly used by drivers/gpu/drm/drm_irq.c.

The related error:
include/video/vga.h:22:21: fatal error: asm/vga.h: No such file or directory

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-04-25 17:45:47 +01:00
Will Deacon 72aea393a2 arm64: smp: honour #address-size when parsing CPU reg property
For systems where the top 32-bits of the MPIDR are all zero, we should
allow the device-tree to specify an #address-size of 0x1 for the CPU reg
property and then zero extend the value there.

Without this patch, kvmtool breaks with the recent mpidr parsing code
introduced in 4c7aa00213 ("arm64: kernel: initialise cpu_logical_map
from the DT").

Acked-by: Javi Merino <javi.merino@arm.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-04-25 17:45:43 +01:00
Chen Gang a84b086b87 arm64: Define cmpxchg64 and cmpxchg64_local for outside use
Drivers use cmpxchg64, cmpxchg64_local to perform 64-bit operation, so
they can cross 32-bit and 64-bit platforms (it is a standard way).

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-04-23 11:47:26 +01:00
Chen Gang 12f883989c arm64: Define readq and writeq for driver module using
when compiling with allmodconfig, CONFIG_64BIT=y the file
drivers/base/regmap/regmap-mmio.c will use readq and writeq so we need
implement these functions.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-04-19 13:57:46 +01:00
Olof Johansson c3e0c873d0 This is the 2nd part of ARM timer clean-ups for 3.10. This series has
the following changes:
 
 - Add sched_clock selection logic to select the highest frequency clock
 - Use full 64-bit arch timer counter for sched_clock
 - Convert arch timer, sp804 and integrator-cp timers to CLKSRC_OF and
 adapt all users to use clocksource_of_init
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQEcBAABAgAGBQJRZx0aAAoJEMhvYp4jgsXiB7MH/AutBUa40yuzTA1RzaDxYTX7
 m1NrjmsTI8pFLX6VTvtwNXdT1AJ0JbzPxu35E1Y8xsu8tnx/RjG/hhqq8R2rXd5t
 oqilT46SPBZpKBSrPSuEQde5v8XlKT5kEcUlg47bHGB1JrI9Ip14okRcg5aCJJzu
 Pb25NqxTWS+vFTNV7C+UzuJ72lJ24FHQXK4AbZqaWcaokGCRLP1QE1s83jY7mpX7
 zd5xWMPygKR8oYNPVhxoD1ajUo5cqVHtcXFRnWy1o/T/8ZPqCuSOsyJokScPHzwa
 vUwoAn2OQSFLJZgITu8+9JSlLxW40BdMHaJ+jTlOXMGDq6RHZY1FHAy8PTf43wU=
 =QjNu
 -----END PGP SIGNATURE-----

Merge tag 'clksrc-cleanup-for-3.10-part2' of git://sources.calxeda.com/kernel/linux into late/clksrc

This is the 2nd part of ARM timer clean-ups for 3.10. This series has
the following changes:

- Add sched_clock selection logic to select the highest frequency clock
- Use full 64-bit arch timer counter for sched_clock
- Convert arch timer, sp804 and integrator-cp timers to CLKSRC_OF and
adapt all users to use clocksource_of_init

* tag 'clksrc-cleanup-for-3.10-part2' of git://sources.calxeda.com/kernel/linux:
  devtree: add binding documentation for sp804
  ARM: integrator-cp: convert use CLKSRC_OF for timer init
  ARM: versatile: use OF init for sp804 timer
  ARM: versatile: add versatile dtbs to dtbs target
  ARM: vexpress: remove extra timer-sp control register clearing
  ARM: dts: vexpress: disable CA9 core tile sp804 timer
  ARM: vexpress: remove sp804 OF init
  ARM: highbank: use OF init for sp804 timer
  ARM: timer-sp: convert to use CLKSRC_OF init
  OF: add empty of_device_is_available for !OF
  ARM: convert arm/arm64 arch timer to use CLKSRC_OF init
  ARM: make machine_desc->init_time default to clocksource_of_init
  ARM: arch_timer: use full 64-bit counter for sched_clock
  ARM: make sched_clock just call a function pointer
  ARM: sched_clock: allow changing to higher frequency counter

Signed-off-by: Olof Johansson <olof@lixom.net>

This has a nasty set of conflicts with the exynos MCT code, which was
moved in a separate branch, and then fixed up when merged in, but still
conflicts a bit here. It should have been sorted out by this merge though.
2013-04-17 10:10:01 -07:00
Christopher Covington 3325732f3b arm64: Fix task tracing
For accurate accounting call contextidr_thread_switch before a
task is scheduled, rather than after, when the 'next' variable has a
different meaning since we switched the stacks.

Signed-off-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-04-17 16:11:35 +01:00
Marc Zyngier 5c1ce6f7c2 arm64: add explicit symbols to ESR_EL1 decoding
The ESR_EL1 decoding process is a bit cryptic, and KVM has also
a need for the same constants.

Add a new esr.h file containing the appropriate exception classes
constants, and change entry.S to use it. Fix a small bug in the
EL1 breakpoint check while we're at it.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-04-17 15:58:25 +01:00
Thomas Gleixner d190e8195b idle: Remove GENERIC_IDLE_LOOP config switch
All archs are converted over. Remove the config switch and the
fallback code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-17 10:39:38 +02:00
Alexandre Courbot 7fd2bf3d32 Remove GENERIC_GPIO config option
GENERIC_GPIO has been made equivalent to GPIOLIB in architecture code
and all driver code has been switch to depend on GPIOLIB. It is thus
safe to have GENERIC_GPIO removed.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
2013-04-16 18:47:19 +09:00
Rob Herring 0583fe478a ARM: convert arm/arm64 arch timer to use CLKSRC_OF init
This converts arm and arm64 to use CLKSRC_OF DT based initialization for
the arch timer. A new function arch_timer_arch_init is added to allow for
arch specific setup.

This has a side effect of enabling sched_clock on omap5 and exynos5. There
should not be any reason not to use the arch timers for sched_clock.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Simon Horman <horms@verge.net.au>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-omap@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2013-04-11 15:11:15 -05:00
Thomas Gleixner 0087298f68 arm64: Use generic idle loop
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: http://lkml.kernel.org/r/20130321215233.887563095@linutronix.de
2013-04-08 17:39:24 +02:00
Linus Torvalds d3f72cfb7a Fix IS_ENABLED() usage typo (missing CONFIG_ prefix).
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJRVDu5AAoJEGvWsS0AyF7xcOQP/3vv9Qy0ib2szZlks/B9rpSw
 XrIIrvx4KpS5NRhuqbFWxZWYi2X4UkzCSnrL+odo75Jr0Hz7e/P12MS72/E4oo0i
 Dp6lfrqCqYE5lD0o7pX0j/UeXqW9BFKJHaF/Lc6qksxI9JNgN61MD6JztBPehVgk
 1kvOr+8gQ48983ainI/H9ti5MhzePiDyCHhqLAh1cnwi27dBlGklP4TFmJ1OSoxN
 R8gaUN/H9D3aM67nWISDRrur0aKTcBqclykRtyNwnkf+MJH4UM8sQdE26unuTe+M
 ypZlry+Kt+hQaQGfM/9IXKoga8OY70oYX402PzRoFMIs73U9e5OCt/h0eOrpSQjg
 sCSTFxiwRU62fz8hgv1a4k3sJOZMvf5dgfr8Gr12sPU8EFD54rkiyWUvp9/RxG8X
 jh4SXSSiNRUoRcegkU/ZICqW/thsVZLB0+7GbJ4M6K6iUGr79Du//TBqas8kvApC
 MmnUQfRyy3tY38BaH1dhz0lv2L0H/src7+fojmFE/ael+ynNBz/uu2siRq3da/Uc
 gRHPLceTxs9Zc178QefbWnDVsseEYCQcKQjof7+bELVh3of6tlQ7RFZ6E92dMX1z
 shVpo8AoK56gIGEhQZ9Vj2LIyJJlTZPBEbWGN7pDvYYXzAEG/cL3OmJnccOfAgCs
 5jk0ybbBoSaW1lyZBuWu
 =vQtd
 -----END PGP SIGNATURE-----

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull arm64 fix from Catalin Marinas:
 "Fix IS_ENABLED() usage typo (missing CONFIG_ prefix)."

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  ARM64: early_printk: Fix check for CONFIG_ARM64_64K_PAGES
2013-03-28 13:45:49 -07:00
Catalin Marinas d4784be3b2 Merge branch 'arm64-klib' into upstream
* arm64-klib:
  arm64: klib: Optimised atomic bitops
  arm64: klib: Optimised string functions
  arm64: klib: Optimised memory functions
2013-03-28 16:13:26 +00:00
Catalin Marinas e851b58cb7 arm64: Use irqchip_init() for interrupt controller initialisation
This patch uses the generic irqchip_init() function for initialising the
interrupt controller on arm64. It also adds several definitions required
by the ARM GIC irqchip driver but does not enable ARM_GIC yet.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-26 16:02:23 +00:00
Liviu Dudau a9a193ffe5 arm64: psci: Use the MPIDR values from cpu_logical_map for cpu ids.
With the (re)introduction of cpu_logical_map in arm64 we switch to
the use of MPIDR values to identify CPUs. Update the psci code to
do that.

Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-26 11:58:10 +00:00
Ben Hutchings d17cfb34dc ARM64: early_printk: Fix check for CONFIG_ARM64_64K_PAGES
The 'CONFIG_' prefix is not implicit in IS_ENABLED().

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-25 17:59:57 +00:00
Catalin Marinas 6247958653 arm64: klib: Optimised atomic bitops
This patch implements the AArch64-specific atomic bitops functions using
exclusive memory accesses to avoid locking.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-21 17:39:31 +00:00
Catalin Marinas 2b8cac814c arm64: klib: Optimised string functions
This patch introduces AArch64-specific string functions (strchr,
strrchr).

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-21 17:39:30 +00:00
Catalin Marinas 4a8992271c arm64: klib: Optimised memory functions
This patch introduces AArch64-specific memory functions (memcpy,
memmove, memchr, memset). These functions are not optimised for any CPU
implementation but can be used as a starting point once hardware is
available.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-21 17:39:29 +00:00
Javi Merino 0359b0e2d0 arm64: head: match all affinity levels in the pen of the secondaries
The reg property of the cpu nodes in the DT now contains all the
affinity levels in (MPIDR[39:32] and MPIDR[23:0]) and that's what
boot_secondary() writes in the pen, so increase the mask in
secondary_holding_pen accordingly.

Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-20 18:09:42 +00:00
Javi Merino 4c7aa00213 arm64: kernel: initialise cpu_logical_map from the DT
When booting the kernel, the cpu logical id map must be initialised
using device tree data passed by FW or through an embedded blob.

This patch parses the reg property in device tree "cpu" nodes,
retrieves the corresponding CPUs hardware identifiers (MPIDR) and
initialises the cpu logical map accordingly.

The device tree HW identifiers are considered valid if all CPU nodes
contain a "reg" property, there are no duplicate "reg" entries and the
DT defines a CPU node whose "reg" property defines affinity levels
that matches those of the boot CPU.

The primary CPU is assigned cpu logical number 0 to keep the current
convention valid.

Based on a0ae024050 (ARM: kernel: add
device tree init map function).

Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-20 17:26:24 +00:00
Javi Merino 3e98fdacc5 arm64: kernel: make the pen of the secondary a 64-bit unsigned value
Change the prototype of write_pen_release() accordingly and clarify
that's holding the hardware id of the secondary that's going to boot.
This is in preparation of getting HWIDs parsed from the DT.

Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-20 17:22:12 +00:00
Catalin Marinas de79a64d61 arm64: Initialise the clocks described via DT
This patch adds an arch_initcall() for the of_clk_init() clock
initialisation.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-20 16:46:43 +00:00
Anup Patel e53f2f4b57 arm64: add support for 8250/16550 earlyprintk
This patch adds support for using earlyprintk with 8250/16550 UART
ports. The 8250/16550 UART can either have 8-bit or 32-bit aligned
registers which is HW vendor dependent.

Kernel args for 8-bit aligned regs: earlyprintk=uart8250-8bit,<phys_address>

Kernel args for 32-bit aligned regs: earlyprintk=uart8250-32bit,<phys_address>

Signed-off-by: Anup Patel <anup.patel@linaro.org>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-20 16:46:42 +00:00
Marc Zyngier 0492f72508 arm64: early_printk: add support for FastModel console output
Enable early_printk to use the FastModel semihosting to output
the early kernel messages. Works both for host and guest kernels.

To use this feature, pass "early_printk=smh" to the kernel.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-20 16:46:42 +00:00
Marc Zyngier d9c1951f40 arm64: add read_cpuid_{implementor,part_number,mpidr}
In order to preserve some kind of source compatibility between
arm and arm64, introduce read_cpuid_{implementor,part_number,mpidr}
which are used on KVM to find out which CPU we're running on.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-20 16:46:42 +00:00
Paul Bolle 792072066d arm64: Kconfig.debug: Remove unused CONFIG_DEBUG_ERRORS
The Kconfig entry for DEBUG_ERRORS is a verbatim copy of the former arm
entry for that symbol. It got removed in v2.6.39 because it wasn't
actually used anywhere. There are still no users of DEBUG_ERRORS so
remove this entry too.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
[catalin.marinas@arm.com: removed option from defconfig]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-19 16:19:19 +00:00
Paul Bolle 63b7743fdd arm64: Do not select GENERIC_HARDIRQS_NO_DEPRECATED
Config option GENERIC_HARDIRQS_NO_DEPRECATED was removed in commit
78c8982564 ("genirq: Remove the now obsolete
config options and select statements"), but the select was accidentally
reintroduced in commit 8c2c3df31e ("arm64:
Build infrastructure").

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-19 15:39:46 +00:00
Andreas Schwab 18931c8927 arm64: fix padding computation in struct ucontext
The expression to compute the padding needed to fill the uc_sigmask field
to 1024 bits actually computes the padding needed for 1080 bits.
Fortunately, due to the 16-byte alignment of the following field
(uc_mcontext) the definition in glibc contains enough bytes of padding
after uc_sigmask so that the overall offsets and size match in both
definitions.

Signed-off-by: Andreas Schwab <schwab@suse.de>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-18 10:42:16 +00:00
Catalin Marinas a2c91547b5 arm64: Fix build error with !SMP
The __atomic_hash is only defined when SMP is enabled but the
arm64ksyms.c exports it even for the UP case.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-18 10:42:14 +00:00
Catalin Marinas 0d96724e29 arm64: Removed unused variable in compat_setup_rt_frame()
Recent clean-up of the compat signal code left an unused 'stack'
variable.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-03-18 10:12:56 +00:00
Al Viro d5dc77bfee consolidate compat lookup_dcookie()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-03-03 23:00:23 -05:00
Linus Torvalds 14cc0b55b7 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull signal/compat fixes from Al Viro:
 "Fixes for several regressions introduced in the last signal.git pile,
  along with fixing bugs in truncate and ftruncate compat (on just about
  anything biarch at least one of those two had been done wrong)."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal:
  compat: restore timerfd settime and gettime compat syscalls
  [regression] braino in "sparc: convert to ksignal"
  fix compat truncate/ftruncate
  switch lseek to COMPAT_SYSCALL_DEFINE
  lseek() and truncate() on sparc really need sign extension
2013-03-02 08:34:06 -08:00
Linus Torvalds 4c8c225abf GPIO changes for Linux 3.9
This branch contains the usual set of individual driver improvements and
 bug fixes, as well as updates to the core code. The more notable changes
 include:
 
 - Internally add new API for referencing GPIOs by gpio_desc instead of
   number. Eventually this will become a public API
 - ACPI GPIO binding support
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJRK77kAAoJEEFnBt12D9kBwZ0P/iJ++tvmUg9mt9qzN0Le0Q02
 TKCQpgOivxng03oTcLIQRK46PNPWdq2zDb1v5seqXKxdMjRd++WLxPxj4eRZNdqA
 J0K820KvqYSLAqEUDwqO288ciOyP6ThDfeT+SUUUCOwFHkFCVS0xYuxLjcX0evah
 pcXuIu6nev2Yo/RivgXVaVkOTVBf7ssR7rTpdkDl/RvK2BMZTfpmt4fAXdDcCb9k
 JlBeSC6Ifx6iUcl+lV+jA0PeA7vOEHBhXWqoy5ivtNPcBbPL//cz0ZdAL0jfVtgn
 17RPugskNv/s2uVJlhiyKA3kF2IzbE3pKGxyl2Teb4Xus398pqqaHPtiLNeKIiSV
 KUJRIu2mGdvb4Vyvno0e5Vll9PcUPX0uIeQ2uzrMAB7XtI4EHw7d9+qwj4qOI6Dg
 edCFNcI9zTeuU/Z3fAg/+ufdIY7muQz8OsKnh3R8fY29SVSa+6o6TT+tgX5M7tjH
 IEI11RaYQQEJSri9bAR0vE1nsFleWsoW6QljVIHLpNS/tBz/S8KYpbQ5qPNXknxf
 lgD0FzkNYPWWi9D3wNutwNeaktCacRfcCTH1Z4FzE+PmxoYeiCzf/4pjFbxU06dm
 WJ7i8E0SRrVW+cM8z7M+Lj6emqtQ5En0bg5ZTo75SM2X+9sNrWtw3UMQ7Ea4gxKM
 362n9tWp2k626DixWzBd
 =JN4M
 -----END PGP SIGNATURE-----

Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux

Pull GPIO changes from Grant Likely:
 "This branch contains the usual set of individual driver improvements
  and bug fixes, as well as updates to the core code.  The more notable
  changes include:

   - Internally add new API for referencing GPIOs by gpio_desc instead
     of number.  Eventually this will become a public API

   - ACPI GPIO binding support"

* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux: (33 commits)
  arm64: select ARCH_WANT_OPTIONAL_GPIOLIB
  gpio: em: Use irq_domain_add_simple() to fix runtime error
  gpio: using common order: let 'static const' instead of 'const static'
  gpio/vt8500: memory cleanup missing
  gpiolib: Fix locking on gpio debugfs files
  gpiolib: let gpio_chip reference its descriptors
  gpiolib: use descriptors internally
  gpiolib: use gpio_chips list in gpiochip_find_base
  gpiolib: use gpio_chips list in sysfs ops
  gpiolib: use gpio_chips list in gpiochip_find
  gpiolib: use gpio_chips list in gpiolib_sysfs_init
  gpiolib: link all gpio_chips using a list
  gpio/langwell: cleanup driver
  gpio/langwell: Add Cloverview ids to pci device table
  gpio/lynxpoint: add chipset gpio driver.
  gpiolib: add missing braces in gpio_direction_show
  gpiolib-acpi: Fix error checks in interrupt requesting
  gpio: mpc8xxx: don't set IRQ_TYPE_NONE when creating irq mapping
  gpiolib: remove gpiochip_reserve()
  arm: pxa: tosa: do not use gpiochip_reserve()
  ...
2013-02-26 09:35:29 -08:00
Linus Torvalds 9043a2650c The sweeping change is to make add_taint() explicitly indicate whether to disable
lockdep, but it's a mechanical change.
 
 Cheers,
 Rusty.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJRJAcuAAoJENkgDmzRrbjxsw0P/3eXb+LddYnx0V0uHYdKpCUf
 4vdW7X0fX3Z+aUK69IWRL/6ahoO4TpaHYGHBDjEoivyQ0GDq14X7JNWsYYt3LdMf
 3wmDgRc2cn/mZOJbFeVpNV8ox5l/xc0CUvV+iQ8tMjfQItXMXgWUFZKMECsXKSO6
 eex3lrw9M2jAX2uL8LQPp9W8xtKu24nSZRC6tH5riE/8fCzi1cZPPAqfxP5c8Lee
 ZXtbCRSyAFENZLpKyMe1PC7HvtJyi5NDn9xwOQiXULZV/VOlvP94DGBLIKCM/6dn
 4QvZxpG0P0uOlpCgRAVLyh/z7g4XY4VF/fHopLCmEcqLsvgD+V2LQpQ9zWUalLPC
 Z+pUpz2vu0gIddPU1nR8R6oGpEdJ8O12aJle62p/RSXWZGx12qUQ+Tamu0tgKcv1
 AsiJfbUGNDYfxgU6sHsoQjl2f68LTVckCU1C1LqEbW/S104EIORtGx30CHM4LRiO
 32kDC5TtgYDBKQAIqJ4bL48ZMh+9W3uX40p7xzOI5khHQjvswUKa3jcxupU0C1uv
 lx8KXo7pn8WT33QGysWC782wJCgJuzSc2vRn+KQoqoynuHGM6agaEtR59gil3QWO
 rQEcxH63BBRDgHlg4FM9IkJwwsnC3PWKL8gbX0uAWXAPMbgapJkuuGZAwt0WDGVK
 +GszxsFkCjlW0mK0egTb
 =tiSY
 -----END PGP SIGNATURE-----

Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull module update from Rusty Russell:
 "The sweeping change is to make add_taint() explicitly indicate whether
  to disable lockdep, but it's a mechanical change."

* tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  MODSIGN: Add option to not sign modules during modules_install
  MODSIGN: Add -s <signature> option to sign-file
  MODSIGN: Specify the hash algorithm on sign-file command line
  MODSIGN: Simplify Makefile with a Kconfig helper
  module: clean up load_module a little more.
  modpost: Ignore ARC specific non-alloc sections
  module: constify within_module_*
  taint: add explicit flag to show whether lock dep is still OK.
  module: printk message when module signature fail taints kernel.
2013-02-25 15:41:43 -08:00
Al Viro 3f6d078d4a fix compat truncate/ftruncate
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-25 09:24:55 -05:00
Al Viro 561c673197 switch lseek to COMPAT_SYSCALL_DEFINE
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-24 10:52:26 -05:00
Linus Torvalds 9e2d59ad58 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull signal handling cleanups from Al Viro:
 "This is the first pile; another one will come a bit later and will
  contain SYSCALL_DEFINE-related patches.

   - a bunch of signal-related syscalls (both native and compat)
     unified.

   - a bunch of compat syscalls switched to COMPAT_SYSCALL_DEFINE
     (fixing several potential problems with missing argument
     validation, while we are at it)

   - a lot of now-pointless wrappers killed

   - a couple of architectures (cris and hexagon) forgot to save
     altstack settings into sigframe, even though they used the
     (uninitialized) values in sigreturn; fixed.

   - microblaze fixes for delivery of multiple signals arriving at once

   - saner set of helpers for signal delivery introduced, several
     architectures switched to using those."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (143 commits)
  x86: convert to ksignal
  sparc: convert to ksignal
  arm: switch to struct ksignal * passing
  alpha: pass k_sigaction and siginfo_t using ksignal pointer
  burying unused conditionals
  make do_sigaltstack() static
  arm64: switch to generic old sigaction() (compat-only)
  arm64: switch to generic compat rt_sigaction()
  arm64: switch compat to generic old sigsuspend
  arm64: switch to generic compat rt_sigqueueinfo()
  arm64: switch to generic compat rt_sigpending()
  arm64: switch to generic compat rt_sigprocmask()
  arm64: switch to generic sigaltstack
  sparc: switch to generic old sigsuspend
  sparc: COMPAT_SYSCALL_DEFINE does all sign-extension as well as SYSCALL_DEFINE
  sparc: kill sign-extending wrappers for native syscalls
  kill sparc32_open()
  sparc: switch to use of generic old sigaction
  sparc: switch sys_compat_rt_sigaction() to COMPAT_SYSCALL_DEFINE
  mips: switch to generic sys_fork() and sys_clone()
  ...
2013-02-23 18:50:11 -08:00
Tang Chen 0197518cd3 memory-hotplug: remove memmap of sparse-vmemmap
Introduce a new API vmemmap_free() to free and remove vmemmap
pagetables.  Since pagetable implements are different, each architecture
has to provide its own version of vmemmap_free(), just like
vmemmap_populate().

Note: vmemmap_free() is not implemented for ia64, ppc, s390, and sparc.

[mhocko@suse.cz: fix implicit declaration of remove_pagetable]
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Jianguo Wu <wujianguo@huawei.com>
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Jiang Liu <jiang.liu@huawei.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Wu Jianguo <wujianguo@huawei.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-23 17:50:12 -08:00
Arnd Bergmann 9170100ee4 arm64: select ARCH_WANT_OPTIONAL_GPIOLIB
An architecture should not unconditionally enable 'GENERIC_GPIO'
without providing an implementation. In case of arm64, selecting
ARCH_WANT_OPTIONAL_GPIOLIB is the right solution, because it
lets us enable GPIOLIB when configuring the kernel, and that
implicitly turns on GENERIC_GPIO.

Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-22 14:12:10 +00:00
Linus Torvalds 8b5628ab83 arm-soc: virtualization changes
This contains parts of the ARM KVM support that have dependencies on
 other patches merged through the arm-soc tree. In combination with
 patches coming through Russell's tree, this will finally add full
 support for the kernel based virtual machine on ARM,  which has
 been awaited for some time now.
 
 Further, we now have a separate platform for virtual machines
 and qemu booting that is used by both Xen and KVM, separating
 these from the Versatile Express reference implementation.
 Obviously, this new platform is multiplatform capable so it
 can be combined with existing machines in the same kernel.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIVAwUAUSUyWmCrR//JCVInAQIomBAAohivsGbHStveQpeYe8H2IH7Oa2/w1YGm
 x8sJEGARj/qpqKSDaMf4NJ/wcpn5AMgUqx4S4kR3p3MG5whr1Wxx7Bdl7FUPpCnY
 uLwD2RsEEfSHDobKIoBcrFZDFPyW+be/nAYFfBUhEUFs8VTot2i4fMhu4HdRUWCt
 e24ig6jHD/dMMPk0dL7SqZ/Hv/bhwhD9ZOckjKDdFlXJQ36nYWTCb6FbsAysNg+x
 zMV3v+cSwngJZHGu3A9oy0KR0COm6aLb5FsJrS3Ni/mYHF/O75tKJGgXkF6JiuVe
 DI5jtVyfT2effUH9I8R7hzkzYPi47XnOjhtZiIlGvBqhcPGu1tBxDy8+H4D0TZ94
 ySUhNPutl6+BTmNjJag61hPZ66kY8yPJkpreHZdvRBZaZMSNLzMnhgdyQRzwbrDL
 VFDxot+zyB8KE7ffsZ2KTr+nwcVCC2XmgYhihRujn8m1u4NF2PYZOIWCuAyPaVEn
 zH1FztrMwXrXbHb0g4kXmZkewzqEHV2GrFzZCNkTjANTcwkB/xLcvSnloxUYGrLv
 URHnJbXM9FyehcY6rlSNMAdwrxa9fFMqmUb08WLv9cxHNYPBg9UN5vIGzjLfOUeK
 ur+i63pgtF8pYy7MaLj+Pa5g19Xk8GHWH4KEQOr6T4yz6z7gyDrjcPDi9fVFGd5E
 u9lP8aNKXcM=
 =u9F0
 -----END PGP SIGNATURE-----

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

Pull ARM virtualization changes:
 "This contains parts of the ARM KVM support that have dependencies on
  other patches merged through the arm-soc tree.  In combination with
  patches coming through Russell's tree, this will finally add full
  support for the kernel based virtual machine on ARM, which has been
  awaited for some time now.

  Further, we now have a separate platform for virtual machines and qemu
  booting that is used by both Xen and KVM, separating these from the
  Versatile Express reference implementation.  Obviously, this new
  platform is multiplatform capable so it can be combined with existing
  machines in the same kernel."

* tag 'virt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (38 commits)
  ARM: arch_timer: include linux/errno.h
  arm: arch_timer: add missing inline in stub function
  ARM: KVM: arch_timers: Wire the init code and config option
  ARM: KVM: arch_timers: Add timer world switch
  ARM: KVM: arch_timers: Add guest timer core support
  ARM: KVM: Add VGIC configuration option
  ARM: KVM: VGIC initialisation code
  ARM: KVM: VGIC control interface world switch
  ARM: KVM: VGIC interrupt injection
  ARM: KVM: vgic: retire queued, disabled interrupts
  ARM: KVM: VGIC virtual CPU interface management
  ARM: KVM: VGIC distributor handling
  ARM: KVM: VGIC accept vcpu and dist base addresses from user space
  ARM: KVM: Initial VGIC infrastructure code
  ARM: KVM: Keep track of currently running vcpus
  KVM: ARM: Introduce KVM_ARM_SET_DEVICE_ADDR ioctl
  ARM: gic: add __ASSEMBLY__ guard to C definitions
  ARM: gic: define GICH offsets for VGIC support
  ARM: gic: add missing distributor defintions
  ARM: mach-virt: fixup machine descriptor after removal of sys_timer
  ...
2013-02-21 15:40:16 -08:00
Linus Torvalds 79a69d342d - SMP support for the PSCI booting protocol (power state coordination
interface).
 - Simple earlyprintk support.
 - Platform devices populated by default from the DT (SoC-agnostic).
 - CONTEXTIDR support (used by external trace tools).
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJRJOI1AAoJEGvWsS0AyF7xzfwP/0vyy1BE9oBWsISu/ITCfMa0
 X6nffGoh1bcq2TqwqYD3M9gH5HJkd/JzyGDyuJdZB72XOB2Z0eiZYTs1E46MhP8g
 17FH0QJG0D5hi32byDM8A1NC+z2Ep6YRDQzlvG1F2StsLDJqZIL0tsSdld8L7gu6
 F/IS6NQy2eGmCcFvX7MCBRien53dPxYhrQfzKcUcCsWZDy1HfSoOBZE4XhZO3eTL
 HiAMDtqb1mTxsHOHHehJLOcEeFH4U7FM1k525VFzrFgCoZ10N85X57guzhnK63Bj
 zmdlP0CvVZDt/vGU08ZJDDWahGzDo6i1tLF66ZDy888zG/QjM2AdGjz99YH/L2so
 TrqGvVtX89doV5isvmS0mJjDx42QwO9881DlrDSMumWu2iVtwmRWcrdZ5MPSyrKU
 bhrDU57/EvHTMbNScaA4SrPVhM2kIoUUYJBLDxiaKfk577mjFod/gfhgg7Mc0I67
 q3jWv9NdcODmX5FAWXZ2jQ0Lz1PsVHNNjpZZQY3TKMLbSLgk+Vcsu07quWxtJl6K
 QqOGAS9QWX6jb1qIxw8NdB0qbGpGR2jIHBRtMNNB65luPm8EqH4bHmGWy6fUahJr
 8UJBUA+v5kRjYwtO6AAtzaJavYePRhAqMIGUu8eoatPzN5JOObp9RAtYuQZNTN9v
 asKJKRGfD8kwBSeovt+X
 =2prj
 -----END PGP SIGNATURE-----

Merge tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull arm64 patches from Catalin Marinas:

 - SMP support for the PSCI booting protocol (power state coordination
   interface).

 - Simple earlyprintk support.

 - Platform devices populated by default from the DT (SoC-agnostic).

 - CONTEXTIDR support (used by external trace tools).

* tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: mm: update CONTEXTIDR register to contain PID of current process
  arm64: atomics: fix grossly inconsistent asm constraints for exclusives
  arm64: compat: use compat_uptr_t type for compat_ucontext.uc_link
  arm64: Select ARCH_WANT_FRAME_POINTERS
  arm64: Add kvm_para.h and xor.h generic headers
  arm64: SMP: enable PSCI boot method
  arm64: psci: add support for PSCI invocations from the kernel
  arm64: SMP: rework the SMP code to be enabling method agnostic
  arm64: perf: add guest vs host discrimination
  arm64: add COMPAT_PSR_*_BIT flags
  arm64: Add simple earlyprintk support
  arm64: Populate the platform devices
2013-02-20 14:30:33 -08:00
Linus Torvalds 8793422fd9 ACPI and power management updates for 3.9-rc1
- Rework of the ACPI namespace scanning code from Rafael J. Wysocki
   with contributions from Bjorn Helgaas, Jiang Liu, Mika Westerberg,
   Toshi Kani, and Yinghai Lu.
 
 - ACPI power resources handling and ACPI device PM update from
   Rafael J. Wysocki.
 
 - ACPICA update to version 20130117 from Bob Moore and Lv Zheng
   with contributions from Aaron Lu, Chao Guan, Jesper Juhl, and
   Tim Gardner.
 
 - Support for Intel Lynxpoint LPSS from Mika Westerberg.
 
 - cpuidle update from Len Brown including Intel Haswell support, C1
   state for intel_idle, removal of global pm_idle.
 
 - cpuidle fixes and cleanups from Daniel Lezcano.
 
 - cpufreq fixes and cleanups from Viresh Kumar and Fabio Baltieri
   with contributions from Stratos Karafotis and Rickard Andersson.
 
 - Intel P-states driver for Sandy Bridge processors from
   Dirk Brandewie.
 
 - cpufreq driver for Marvell Kirkwood SoCs from Andrew Lunn.
 
 - cpufreq fixes related to ordering issues between acpi-cpufreq and
   powernow-k8 from Borislav Petkov and Matthew Garrett.
 
 - cpufreq support for Calxeda Highbank processors from Mark Langsdorf
   and Rob Herring.
 
 - cpufreq driver for the Freescale i.MX6Q SoC and cpufreq-cpu0 update
   from Shawn Guo.
 
 - cpufreq Exynos fixes and cleanups from Jonghwan Choi, Sachin Kamat,
   and Inderpal Singh.
 
 - Support for "lightweight suspend" from Zhang Rui.
 
 - Removal of the deprecated power trace API from Paul Gortmaker.
 
 - Assorted updates from Andreas Fleig, Colin Ian King,
   Davidlohr Bueso, Joseph Salisbury, Kees Cook, Li Fei,
   Nishanth Menon, ShuoX Liu, Srinivas Pandruvada, Tejun Heo,
   Thomas Renninger, and Yasuaki Ishimatsu.
 
 /
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.19 (GNU/Linux)
 
 iQIcBAABAgAGBQJRIsArAAoJEKhOf7ml8uNsD6MP/j7C4NA+GTq6RdwoJt+Yki0K
 9Ep8I4pEuRFoN/oskv24EyQhpGJIk6UxWcJ/DWFBc+1VhmKORta7k2Idv/wlJA77
 s7AcDveA9xcDh+TVfbh87TeuiMSXiSdDZbiaQO+wMizWJAF3F84AnjiAqqqyQcSK
 bA5/Siz/vWlt9PyYDaQtHTVE4lpvPuVcQdYewsdaH2PsmUjvIg/TUzg28CTrdyvv
 eHOdBK9R0/OLQLhzRbL0VOGJ//wEl+HJRO0QEhTKPgdQ1e/VH/4Zu5WSzF8P/x4C
 s2f8U4IKQqulDuDHXtpMpelFm7hRWgsOqZLkcyXLs+0dvSM9CTPO6P0ZaImxUctk
 5daHWEsXUnCErDQawt1mcZP8l6qnxofMQIfLXyPVzvlSnHyToTmrtXa1v2u4AuL/
 hOo4MYWsFNUmRdtGFFGlExGgEDZ4G5NwiYjRBl/6XJ3v4nhnnMbuzxP8scpoe5m1
 8tjroJHZFUUs/mFU/H+oRbHzSzXPmp1sddNaTg4OpVmTn3DDh6ljnFhiItd1Ndw0
 5ldVbSe6ETq5RoK0TbzvQOeVpa9F3JfqbrXLQPqfd2iz/No41LQYG1uShRYuXKuA
 wfEcc+c9VMd3FILu05pGwBnU8VS9VbxTYMz7xDxg6b29Ywnb7u+Q1ycCk2gFYtkS
 E2oZDuyewTJxaskzYsNr
 =wijn
 -----END PGP SIGNATURE-----

Merge tag 'pm+acpi-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management updates from Rafael Wysocki:

 - Rework of the ACPI namespace scanning code from Rafael J.  Wysocki
   with contributions from Bjorn Helgaas, Jiang Liu, Mika Westerberg,
   Toshi Kani, and Yinghai Lu.

 - ACPI power resources handling and ACPI device PM update from Rafael
   J Wysocki.

 - ACPICA update to version 20130117 from Bob Moore and Lv Zheng with
   contributions from Aaron Lu, Chao Guan, Jesper Juhl, and Tim Gardner.

 - Support for Intel Lynxpoint LPSS from Mika Westerberg.

 - cpuidle update from Len Brown including Intel Haswell support, C1
   state for intel_idle, removal of global pm_idle.

 - cpuidle fixes and cleanups from Daniel Lezcano.

 - cpufreq fixes and cleanups from Viresh Kumar and Fabio Baltieri with
   contributions from Stratos Karafotis and Rickard Andersson.

 - Intel P-states driver for Sandy Bridge processors from Dirk
   Brandewie.

 - cpufreq driver for Marvell Kirkwood SoCs from Andrew Lunn.

 - cpufreq fixes related to ordering issues between acpi-cpufreq and
   powernow-k8 from Borislav Petkov and Matthew Garrett.

 - cpufreq support for Calxeda Highbank processors from Mark Langsdorf
   and Rob Herring.

 - cpufreq driver for the Freescale i.MX6Q SoC and cpufreq-cpu0 update
   from Shawn Guo.

 - cpufreq Exynos fixes and cleanups from Jonghwan Choi, Sachin Kamat,
   and Inderpal Singh.

 - Support for "lightweight suspend" from Zhang Rui.

 - Removal of the deprecated power trace API from Paul Gortmaker.

 - Assorted updates from Andreas Fleig, Colin Ian King, Davidlohr Bueso,
   Joseph Salisbury, Kees Cook, Li Fei, Nishanth Menon, ShuoX Liu,
   Srinivas Pandruvada, Tejun Heo, Thomas Renninger, and Yasuaki
   Ishimatsu.

* tag 'pm+acpi-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (267 commits)
  PM idle: remove global declaration of pm_idle
  unicore32 idle: delete stray pm_idle comment
  openrisc idle: delete pm_idle
  mn10300 idle: delete pm_idle
  microblaze idle: delete pm_idle
  m32r idle: delete pm_idle, and other dead idle code
  ia64 idle: delete pm_idle
  cris idle: delete idle and pm_idle
  ARM64 idle: delete pm_idle
  ARM idle: delete pm_idle
  blackfin idle: delete pm_idle
  sparc idle: rename pm_idle to sparc_idle
  sh idle: rename global pm_idle to static sh_idle
  x86 idle: rename global pm_idle to static x86_idle
  APM idle: register apm_cpu_idle via cpuidle
  cpufreq / intel_pstate: Add kernel command line option disable intel_pstate.
  cpufreq / intel_pstate: Change to disallow module build
  tools/power turbostat: display SMI count by default
  intel_idle: export both C1 and C1E
  ACPI / hotplug: Fix concurrency issues and memory leaks
  ...
2013-02-20 11:26:56 -08:00
Linus Torvalds b7133a9a10 Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq core changes from Ingo Molnar:
 "The biggest changes are the IRQ-work and printk changes from Frederic
  Weisbecker, which prepare the code for 'full dynticks' (the ability to
  stop or slow down the periodic tick arbitrarily, not just in idle time
  as today):

   - Don't stop tick with irq works pending.  This fix is generally
     useful and concerns archs that can't raise self IPIs.

   - Flush irq works before CPU offlining.

   - Introduce "lazy" irq works that can wait for the next tick to be
     executed, unless it's stopped.

   - Implement klogd wake up using irq work.  This removes the ad-hoc
     printk_tick()/printk_needs_cpu() hooks and make it working even in
     dynticks mode.

   - Cleanups and fixes."

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Export enable/disable_percpu_irq()
  arch Kconfig: Remove references to IRQ_PER_CPU
  irq_work: Remove return value from the irq_work_queue() function
  genirq: Avoid deadlock in spurious handling
  printk: Wake up klogd using irq_work
  irq_work: Make self-IPIs optable
  irq_work: Warn if there's still work on cpu_down
  irq_work: Flush work on CPU_DYING
  irq_work: Don't stop the tick with pending works
  nohz: Add API to check tick state
  irq_work: Remove CONFIG_HAVE_IRQ_WORK
  irq_work: Fix racy check on work pending flag
  irq_work: Fix racy IRQ_WORK_BUSY flag setting
2013-02-19 17:47:58 -08:00
Len Brown dc883ca34a ARM64 idle: delete pm_idle
pm_idle() on arm64 was a synonym for default_idle(),
so remove it and invoke default_idle() directly.

Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2013-02-17 23:37:05 -05:00
Al Viro d64008a8f3 burying unused conditionals
__ARCH_WANT_SYS_RT_SIGACTION,
__ARCH_WANT_SYS_RT_SIGSUSPEND,
__ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND,
__ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL - not used anymore
CONFIG_GENERIC_{SIGALTSTACK,COMPAT_RT_SIG{ACTION,QUEUEINFO,PENDING,PROCMASK}} -
can be assumed always set.
2013-02-14 09:21:15 -05:00
Al Viro 51682036d0 arm64: switch to generic old sigaction() (compat-only)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-14 09:17:54 -05:00
Al Viro 02323a9d92 arm64: switch to generic compat rt_sigaction()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-14 09:17:53 -05:00
Al Viro 84b9e9b402 arm64: switch compat to generic old sigsuspend
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-14 09:17:53 -05:00
Al Viro 4cd2b2fa61 arm64: switch to generic compat rt_sigqueueinfo()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-14 09:17:53 -05:00
Al Viro 67cf48fe25 arm64: switch to generic compat rt_sigpending()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-14 09:17:52 -05:00
Al Viro 630cfbbbe6 arm64: switch to generic compat rt_sigprocmask()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-14 09:17:52 -05:00
Al Viro 207bdae452 arm64: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-14 09:17:29 -05:00
Will Deacon ec45d1cfd3 arm64: mm: update CONTEXTIDR register to contain PID of current process
This patch is a port of 575320d62 ("ARM: 7445/1: mm: update CONTEXTIDR
register to contain PID of current process") from ARM that introduces a
new Kconfig option which, when enabled, causes the kernel to write the
PID of the current task into the CONTEXTIDR register on context switch.
This is useful when analysing hardware trace, since writes to this
register can be configured to emit an event into the trace stream.

Signed-off-by: Will Deacon <will.deacon@arm.com>
[catalin.marinas@arm.com: contextidr_thread_switch() moved to mmu_context.h]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-02-11 18:24:18 +00:00
Will Deacon 3a0310eb36 arm64: atomics: fix grossly inconsistent asm constraints for exclusives
Our uses of inline asm constraints for atomic operations are fairly
wild and varied. We basically need to guarantee the following:

  1. Any instructions with barrier implications
     (load-acquire/store-release) have a "memory" clobber

  2. When performing exclusive accesses, the addresing mode is generated
     using the "Q" constraint

  3. Atomic blocks which use the condition flags, have a "cc" clobber

This patch addresses these concerns which, as well as fixing the
semantics of the code, stops GCC complaining about impossible asm
constraints.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-02-11 18:16:41 +00:00
Will Deacon c0e01d5d8f arm64: compat: use compat_uptr_t type for compat_ucontext.uc_link
struct compat_ucontext * is a 64-bit pointer, so we need to use a
compat_uptr_t instead to avoid declaring a structure incompatible with
what AArch32 userspace expects.

Cc: <stable@vger.kernel.org>
Reported-by: Edmund Grimley-Evans <Edmund.Grimley-Evans@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-02-11 12:39:16 +00:00
Will Deacon 9e02e394c7 Merge branch 'for-will/arch-timer-unification' of git://linux-arm.org/linux-mr into for-arm-soc/arch-timers 2013-02-01 10:28:36 +00:00
Mark Rutland 1aee5d7a81 arm64: move from arm_generic to arm_arch_timer
The arch_timer driver supports a superset of the functionality of the
arm_generic driver, and is not tied to a particular arch.

This patch moves arm64 to use the arch_timer driver, gaining additional
functionality in doing so, and removes the (now unused) arm_generic
driver. Timer-related hooks specific to arm64 are moved into
arch/arm64/kernel/time.c.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2013-01-31 15:51:59 +00:00
Mark Rutland 1dac0dd71c arm64: arm_generic: prevent reading stale time
Currently arch_counter_get_cnt{p,v}ct can be speculated, allowing for
stale time values to be read. This could be problematic for the delay
loop and other sensitive functions, as the time delta could jump around
unexpectedly.

This patch adds isbs to arch_counter_get_cnt{p,v}ct, preventing this
possibility.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-31 15:51:49 +00:00
Catalin Marinas b6f3598140 arm64: Select ARCH_WANT_FRAME_POINTERS
The compiler generates framepointers by default anyway but this is to
avoid a kbuild warning.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-29 18:25:41 +00:00
Catalin Marinas aac67a922e arm64: Add kvm_para.h and xor.h generic headers
Required for make allyesconfig.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-29 17:39:15 +00:00
Marc Zyngier 0459ca9b7a arm64: SMP: enable PSCI boot method
Wire the PSCI implementation into the SMP secondary startup
code.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-29 16:56:37 +00:00
Will Deacon e790f1deb2 arm64: psci: add support for PSCI invocations from the kernel
This patch adds support for the Power State Coordination Interface
defined by ARM, allowing Linux to request CPU-centric power-management
operations from firmware implementing the PSCI protocol.

Signed-off-by: Will Deacon <will.deacon@arm.com>
[Marc: s/u32/u64/ in the relevant spots, and switch from an initcall
 to an simpler init function]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-29 16:56:37 +00:00
Marc Zyngier d329de3f2a arm64: SMP: rework the SMP code to be enabling method agnostic
In order to introduce PSCI support, let the SMP code handle
multiple enabling methods. This also allow CPUs to be booted
using different methods (though this feels a bit weird...).

In the process, move the spin-table code to its own file.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-29 16:56:37 +00:00
Marc Zyngier 75e424620a arm64: perf: add guest vs host discrimination
Add minimal guest support to perf, so it can distinguish whether
the PMU interrupt was in the host or the guest, as well as collecting
some very basic information (guest PC, user vs kernel mode).

This is not feature complete though, as it doesn't support backtracing
in the guest.

Based on the x86 implementation, tested with KVM/arm64.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-29 16:56:17 +00:00
Marc Zyngier 10a3cc2f76 arm64: add COMPAT_PSR_*_BIT flags
In order to mess with the processor state when running 32bit
guests, define all the AArch32 PSR flags.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-29 16:56:17 +00:00
Ingo Molnar 786133f6e8 Merge branch 'core/irq_work' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into irq/core
irq_work fixes and cleanups, in preparation for full dyntics support.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-01-24 12:48:41 +01:00
Catalin Marinas 2475ff9d2c arm64: Add simple earlyprintk support
This patch adds support for "earlyprintk=" parameter on the kernel
command line. The format is:

  earlyprintk=<name>[,<addr>][,<options>]

where <name> is the name of the (UART) device, e.g. "pl011", <addr> is
the I/O address. The <options> aren't currently used.

The mapping of the earlyprintk device is done very early during kernel
boot and there are restrictions on which functions it can call. A
special early_io_map() function is added which creates the mapping from
the pre-defined EARLY_IOBASE to the device I/O address passed via the
kernel parameter. The pgd entry corresponding to EARLY_IOBASE is
pre-populated in head.S during kernel boot.

Only PL011 is currently supported and it is assumed that the interface
is already initialised by the boot loader before the kernel is started.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2013-01-22 17:51:01 +00:00
Catalin Marinas d6bafb9b82 arm64: Populate the platform devices
This patch add a device_initcall() to populate the platform devices
(of_default_bus_match_table). This allows SoC implementations that do
not require earlier initcalls to avoid any platform-specific code under
arch/arm64.

GIC and generic timer initialisation is done via FDT and CPU notifiers
independently of the SoC code.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2013-01-22 17:51:00 +00:00
Will Deacon 9cf2b72b25 arm64: elf: fix core dumping to match what glibc expects
The kernel's internal definition of ELF_NGREG uses struct pt_regs, which
means that we disagree with userspace on the size of coredumps since
glibc correctly uses the user-visible struct user_pt_regs.

This patch fixes our ELF_NGREG definition to use struct user_pt_regs
and introduces our own ELF_CORE_COPY_REGS to convert between the user
and kernel structure definitions.

Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-22 17:50:59 +00:00
Rusty Russell 373d4d0997 taint: add explicit flag to show whether lock dep is still OK.
Fix up all callers as they were before, with make one change: an
unsigned module taints the kernel, but doesn't turn off lockdep.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2013-01-21 17:17:57 +10:30
Linus Torvalds a6d3bd274b - Page protection fixes, including proper PAGE_NONE handling
- Timezone vdso sequence counting fix
 - Additional compat syscall wiring
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJQ9ZopAAoJEGvWsS0AyF7xQe8QAJScJBZpw8VZxh+/5fREQ1A4
 5QSFAEx/jNWBbVBU/Ak5DJOZq89RSruI5Jzf2t4SVWcC8YdUOoNEfUoj6R0Xj/9A
 GLwc4dE5QZiYBO5GkfhbYMWTDyVopgesf3cpg9IXGsO7wQBp2a7q67xFo7yMV92h
 lSRDzN0CT0/i1utbNc3F/Sp59Xe+5nQP4I5NkaVnEkG6ZB+IDxK8eqbbjEpd6Yqb
 upUPQFVHKBK7hy7Xb1UhmbZM3N7tURALb2RdKdDsTrE8X554scMfpKLIzCsjyFMU
 wrJodeS/cyRpIepUhfTtupfJOCUIEAv8QDK99zKSFV8F/A+0EzQ0fc9ee8rH1i/h
 Wxu5VTFruRtOi1mH04r9cOm5kZDDyv02gqjrA0cWrWYLwWOT07DgXE92yMHvS2z9
 WcyxrgkjvLZMARIDFJj5pK04u+djz/U4qWovfl2nk9aPDwk2CkW0eDTqyzyUwbHi
 dUN7YIim2fHRB4HIUSCaauAdXVbaPPmPWBZape2IeDmY/c48MnZlgZgLIUOUfL+T
 DAzhpm4J5i3Kx43rjnqepBkf8sOfxV4Mq4ZGit1wQZSnwqKYDGTpUr8bP2wmuPTj
 wSmwO5dIyDeDe/gwik/fZuLdR9325clEaKfcZtNzIlbEfDMl8uRtrRzH04rWrXZL
 F167yWzGgYLm6IDNdovR
 =v7NF
 -----END PGP SIGNATURE-----

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull arm64 fixes from Catalin Marinas:
 - Page protection fixes, including proper PAGE_NONE handling
 - Timezone vdso sequence counting fix
 - Additional compat syscall wiring

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: compat: add syscall table entries for new syscalls
  arm64: mm: introduce present, faulting entries for PAGE_NONE
  arm64: mm: only wrprotect clean ptes if they are present
  arm64: vdso: remove broken, redundant sequence counting for timezones
2013-01-16 09:44:40 -08:00
Will Deacon 72d0ac048f arm64: compat: add syscall table entries for new syscalls
There have been a number of new syscalls introduced to arch/arm/ since
the compat layer was implemented for arm64, so add pointers to the
relevant functions to the compat syscall table.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-15 17:15:16 +00:00
Stephen Warren d0b6a548f7 arm64: dts: prevent *.dtb from always being rebuilt
if_changed (used by the *.dts->*.dtc rule) rebuilds files if they aren't
contained in $(targets). (make V=2 indicates this). Add $(dtb-y) to
$(targets) to prevent *.dtb from always being rebuilt. Note

This fixes a regression introduced by the .dtb rule rework in da4cbc6
"arm64: use new common dtc rule", although since arm64 doesn't actually
have any *.dts yet, this isn't a critical issue.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2013-01-14 08:08:28 -06:00
Will Deacon a6fadf7e67 arm64: mm: introduce present, faulting entries for PAGE_NONE
This is mostly a port of dbf62d5006 ("ARM: mm: introduce L_PTE_VALID
for page table entries") and 26ffd0d43b ("ARM: mm: introduce present,
faulting entries for PAGE_NONE") from ARM, which makes use of present,
faulting page table entries for page table entries mapped as PROT_NONE.

The main difference with this implementation is that we can make use of
the two pte type bits in order to avoid allocating a software bit for
identifying PROT_NONE pages, instead reserving the 10b suffix for these
types of mappings.

This is required to prevent users from accessing such pages via syscalls
such as read/write over a pipe.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-10 10:48:48 +00:00
Will Deacon 02522463c8 arm64: mm: only wrprotect clean ptes if they are present
Marking non-present ptes as read-only can corrupt file ptes, breaking
things like swap and file mappings.

This patch ensures that we only manipulate user pte bits when the pte
is marked present.

Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-10 10:43:44 +00:00
Will Deacon bdba0051eb arm64: vdso: remove broken, redundant sequence counting for timezones
This patch is an arm64 version of ce73ec6db4 ("powerpc/vdso: Remove
redundant locking in update_vsyscall_tz()").

Timezone data is not protected, so the sequence counter is not required
to ensure consistency. Furthermore, having multiple paths updating the
counter leads to a race between update_vsyscall and update_vsyscall_tz,
so remove the timezone sequence counting from both the kernel and the
vdso.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-10 10:43:43 +00:00
Linus Torvalds 5f243b9b46 - Missing include in asm/compat.h.
- Kconfig updates.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJQ5vVfAAoJEGvWsS0AyF7xUq4P/12v8hr2fpdPJ7BMA7OCSZli
 kR+CKl0zl0g8Lzf5o6ruHO1ml6M+Q7cLgiOljxHikVnq53//MRKaTKpxVrhVR5/Y
 vzcHR+U7R0h7B34L4E5dD8KIeiHjYxIN9KF7oHjGSxvJg654r5Md1owgWIn6vasp
 t/Q0bSZHEosVkQlkFfydtSIzp79M/UPWGZiKjQSzKLEyOT92w6nphxfVSLmklDST
 qqWZUXBNXUEc95MEXqqc2VVejwtCww+qd+CvNXiLv4R5JTiD5UZTiSoG5C2hkEqO
 HMn7/fYyUWB0kEWN2wDPDGYosYLyyo5f+6peNVEMUfAKJQpLb4hSaaf5rAvMP7rT
 wg0vhFnLzl3ovwF0d+0hN7j2TN7yoYk/2rHmrqSdJqfra/KSf2WLEd9q+QtBxRi5
 BGUDiaGQq0mrp6WmxsqH4dGiq2WIVEg5DLGnJ6SIrML/MIXRfH8D91H7pQvH3rga
 VcJR0f/ZPPQMOgR0djUlhQ2fctd9ouupKluioJzRtW8ATOTSWEvD2W735FoL8QCK
 f0TvF/0vNQ0I8OkX805kB/ArKRJN5AZYvQsZxWiAkUv7/AFOvAqjwl0+ks5vqqyJ
 klXgvlZtgiO+/3bJ5fGsX9vOyQ0DaIxXVOsLwa2L5Fi2uBpwVYaZUuKT1yGqNGop
 6PxnDy/7sZlPAqUqKIVe
 =05eO
 -----END PGP SIGNATURE-----

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull ARM64 fixes from Catalin Marinas:
 - Missing include in asm/compat.h.
 - Kconfig updates.

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: Always select ARM_AMBA and GENERIC_GPIO
  arm64: Keep the ARM64 Kconfig selects sorted
  arm64: Include linux/ptrace.h in asm/compat.h
2013-01-04 10:41:54 -08:00
Catalin Marinas 25c92a37a8 arm64: Always select ARM_AMBA and GENERIC_GPIO
Needed for most SoCs.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-04 13:20:09 +00:00
Greg Kroah-Hartman b881bc469b ARCH: drivers remove __dev* attributes.
This fixes up all of the smaller arches that had __dev* markings for
their platform-specific drivers.

CONFIG_HOTPLUG is going away as an option.  As a result, the __dev*
markings need to be removed.

This change removes the use of __devinit, __devexit_p, __devinitdata,
__devinitconst, and __devexit from these drivers.

Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.

Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Bob Liu <lliubbo@gmail.com>
Cc: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Myron Stowe <myron.stowe@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Yong Zhang <yong.zhang0@gmail.com>
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Jan Glauber <jang@linux.vnet.ibm.com>
Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-03 15:57:13 -08:00
Catalin Marinas db2789b500 arm64: Keep the ARM64 Kconfig selects sorted
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-02 12:37:17 +00:00
Catalin Marinas 7ae42c96cf arm64: Include linux/ptrace.h in asm/compat.h
Commit 9b064fc3f9 (new helper:
compat_user_stack_pointer()) introduces a call to current_pt_regs()
which is defined in linux/ptrace.h, not currently included asm/compat.h.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-02 11:50:19 +00:00
Linus Torvalds 54d46ea993 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull signal handling cleanups from Al Viro:
 "sigaltstack infrastructure + conversion for x86, alpha and um,
  COMPAT_SYSCALL_DEFINE infrastructure.

  Note that there are several conflicts between "unify
  SS_ONSTACK/SS_DISABLE definitions" and UAPI patches in mainline;
  resolution is trivial - just remove definitions of SS_ONSTACK and
  SS_DISABLED from arch/*/uapi/asm/signal.h; they are all identical and
  include/uapi/linux/signal.h contains the unified variant."

Fixed up conflicts as per Al.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal:
  alpha: switch to generic sigaltstack
  new helpers: __save_altstack/__compat_save_altstack, switch x86 and um to those
  generic compat_sys_sigaltstack()
  introduce generic sys_sigaltstack(), switch x86 and um to it
  new helper: compat_user_stack_pointer()
  new helper: restore_altstack()
  unify SS_ONSTACK/SS_DISABLE definitions
  new helper: current_user_stack_pointer()
  missing user_stack_pointer() instances
  Bury the conditionals from kernel_thread/kernel_execve series
  COMPAT_SYSCALL_DEFINE: infrastructure
2012-12-20 18:05:28 -08:00
Linus Torvalds 787314c35f IOMMU Updates for Linux v3.8
A few new features this merge-window. The most important one is
 probably, that dma-debug now warns if a dma-handle is not checked with
 dma_mapping_error by the device driver. This requires minor changes to
 some architectures which make use of dma-debug. Most of these changes
 have the respective Acks by the Arch-Maintainers.
 Besides that there are updates to the AMD IOMMU driver for refactor the
 IOMMU-Groups support and to make sure it does not trigger a hardware
 erratum.
 The OMAP changes (for which I pulled in a branch from Tony Lindgren's
 tree) have a conflict in linux-next with the arm-soc tree. The conflict
 is in the file arch/arm/mach-omap2/clock44xx_data.c which is deleted in
 the arm-soc tree. It is safe to delete the file too so solve the
 conflict. Similar changes are done in the arm-soc tree in the common
 clock framework migration. A missing hunk from the patch in the IOMMU
 tree will be submitted as a seperate patch when the merge-window is
 closed.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJQzbQQAAoJECvwRC2XARrjXCIP/2RxBzbVOiaPOorl+ZWbsZ41
 lzWiXsCHJkh4BK4/qGsVeKhiNd9LcbQUlhywnBbhWxym3spzmjGtvU2Hcg8QiO/M
 R83r9S4e8Z6DnF9Gcats1Ns9BufgpyhLXg3XoXPxtyHOgRS59fvYi6xXOxyX30Dy
 uhbj+WL6UD0zvOMNztEnM1p6UhX+XlpvzKDTR5+G5xKdVPkcgeiaKSwqz739caTn
 QE2NpqIh+8Mwuu1nIapk8h07xhUYU5eGMXa38u1LvDwSHsrsCMLC+lXIjtInn7Gw
 Bv+XcCHgtOaoPQwwk/xd2HVwJQxO9HNb5YX51EIjwP0C5S/3yW9Ji1RgqFb6Ewqq
 jIkF6ckwUheLWsBGkw5UknI/f7RX3MDiTWkziYLIniYKKewm+ymGfgIqPt2TzLIO
 tMZZiIssKvy7wOXQ5JjpYJg5Xmrau6opNwdEguC8pWkJT7qsn+3SeLjMt0Lh9IoY
 +37DOgOLb3O3/vnZJ3i0KMRZBfVeaRj5HaGmlxFCYUZCNQymIPTih9Jtqm+WuVcu
 YaGQCTtynsQ0JVh8YEekLzSfgd3OODP68fyCg1CQNixEgvUi2hd/toX2/Z1wkkSA
 JC9bZarcoPkSWqaTAA2HvmaaxvRR+0UbhFPopFTQarVV0MVLZWBxoyuKy/nMrmMd
 UgTzrDYy74UKdrSTwIXg
 =pPHZ
 -----END PGP SIGNATURE-----

Merge tag 'iommu-updates-v3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU updates from Joerg Roedel:
 "A few new features this merge-window.  The most important one is
  probably, that dma-debug now warns if a dma-handle is not checked with
  dma_mapping_error by the device driver.  This requires minor changes
  to some architectures which make use of dma-debug.  Most of these
  changes have the respective Acks by the Arch-Maintainers.

  Besides that there are updates to the AMD IOMMU driver for refactor
  the IOMMU-Groups support and to make sure it does not trigger a
  hardware erratum.

  The OMAP changes (for which I pulled in a branch from Tony Lindgren's
  tree) have a conflict in linux-next with the arm-soc tree.  The
  conflict is in the file arch/arm/mach-omap2/clock44xx_data.c which is
  deleted in the arm-soc tree.  It is safe to delete the file too so
  solve the conflict.  Similar changes are done in the arm-soc tree in
  the common clock framework migration.  A missing hunk from the patch
  in the IOMMU tree will be submitted as a seperate patch when the
  merge-window is closed."

* tag 'iommu-updates-v3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (29 commits)
  ARM: dma-mapping: support debug_dma_mapping_error
  ARM: OMAP4: hwmod data: ipu and dsp to use parent clocks instead of leaf clocks
  iommu/omap: Adapt to runtime pm
  iommu/omap: Migrate to hwmod framework
  iommu/omap: Keep mmu enabled when requested
  iommu/omap: Remove redundant clock handling on ISR
  iommu/amd: Remove obsolete comment
  iommu/amd: Don't use 512GB pages
  iommu/tegra: smmu: Move bus_set_iommu after probe for multi arch
  iommu/tegra: gart: Move bus_set_iommu after probe for multi arch
  iommu/tegra: smmu: Remove unnecessary PTC/TLB flush all
  tile: dma_debug: add debug_dma_mapping_error support
  sh: dma_debug: add debug_dma_mapping_error support
  powerpc: dma_debug: add debug_dma_mapping_error support
  mips: dma_debug: add debug_dma_mapping_error support
  microblaze: dma-mapping: support debug_dma_mapping_error
  ia64: dma_debug: add debug_dma_mapping_error support
  c6x: dma_debug: add debug_dma_mapping_error support
  ARM64: dma_debug: add debug_dma_mapping_error support
  intel-iommu: Prevent devices with RMRRs from being placed into SI Domain
  ...
2012-12-20 10:07:25 -08:00
Al Viro 9b064fc3f9 new helper: compat_user_stack_pointer()
Compat counterpart of current_user_stack_pointer(); for most of the biarch
architectures those two are identical, but e.g. arm64 and arm use different
registers for stack pointer...

Note that amd64 variants of current_user_stack_pointer/compat_user_stack_pointer
do *not* rely on pt_regs having been through FIXUP_TOP_OF_STACK.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-12-19 18:07:40 -05:00
Al Viro ae903caae2 Bury the conditionals from kernel_thread/kernel_execve series
All architectures have
	CONFIG_GENERIC_KERNEL_THREAD
	CONFIG_GENERIC_KERNEL_EXECVE
	__ARCH_WANT_SYS_EXECVE
None of them have __ARCH_WANT_KERNEL_EXECVE and there are only two callers
of kernel_execve() (which is a trivial wrapper for do_execve() now) left.
Kill the conditionals and make both callers use do_execve().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-12-19 18:07:38 -05:00
Catalin Marinas 0ad50c3896 compat: generic compat_sys_sched_rr_get_interval() implementation
This function is used by sparc, powerpc tile and arm64 for compat support.
 The patch adds a generic implementation with a wrapper for PowerPC to do
the u32->int sign extension.

The reason for a single patch covering powerpc, tile, sparc and arm64 is
to keep it bisectable, otherwise kernel building may fail with mismatched
function declarations.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>  [for tile]
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-17 17:15:18 -08:00
Joerg Roedel 9c6ecf6a3a Merge branches 'iommu/fixes', 'dma-debug', 'x86/amd', 'x86/vt-d', 'arm/tegra' and 'arm/omap' into next 2012-12-16 12:24:09 +01:00
Linus Torvalds 9977d9b379 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull big execve/kernel_thread/fork unification series from Al Viro:
 "All architectures are converted to new model.  Quite a bit of that
  stuff is actually shared with architecture trees; in such cases it's
  literally shared branch pulled by both, not a cherry-pick.

  A lot of ugliness and black magic is gone (-3KLoC total in this one):

   - kernel_thread()/kernel_execve()/sys_execve() redesign.

     We don't do syscalls from kernel anymore for either kernel_thread()
     or kernel_execve():

     kernel_thread() is essentially clone(2) with callback run before we
     return to userland, the callbacks either never return or do
     successful do_execve() before returning.

     kernel_execve() is a wrapper for do_execve() - it doesn't need to
     do transition to user mode anymore.

     As a result kernel_thread() and kernel_execve() are
     arch-independent now - they live in kernel/fork.c and fs/exec.c
     resp.  sys_execve() is also in fs/exec.c and it's completely
     architecture-independent.

   - daemonize() is gone, along with its parts in fs/*.c

   - struct pt_regs * is no longer passed to do_fork/copy_process/
     copy_thread/do_execve/search_binary_handler/->load_binary/do_coredump.

   - sys_fork()/sys_vfork()/sys_clone() unified; some architectures
     still need wrappers (ones with callee-saved registers not saved in
     pt_regs on syscall entry), but the main part of those suckers is in
     kernel/fork.c now."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (113 commits)
  do_coredump(): get rid of pt_regs argument
  print_fatal_signal(): get rid of pt_regs argument
  ptrace_signal(): get rid of unused arguments
  get rid of ptrace_signal_deliver() arguments
  new helper: signal_pt_regs()
  unify default ptrace_signal_deliver
  flagday: kill pt_regs argument of do_fork()
  death to idle_regs()
  don't pass regs to copy_process()
  flagday: don't pass regs to copy_thread()
  bfin: switch to generic vfork, get rid of pointless wrappers
  xtensa: switch to generic clone()
  openrisc: switch to use of generic fork and clone
  unicore32: switch to generic clone(2)
  score: switch to generic fork/vfork/clone
  c6x: sanitize copy_thread(), get rid of clone(2) wrapper, switch to generic clone()
  take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.h
  mn10300: switch to generic fork/vfork/clone
  h8300: switch to generic fork/vfork/clone
  tile: switch to generic clone()
  ...

Conflicts:
	arch/microblaze/include/asm/Kbuild
2012-12-12 12:22:13 -08:00
Linus Torvalds 97ebe8f55a Main AArch64 changes:
- Generic execve, kernel_thread, fork/vfork/clone.
 - Preparatory patches for KVM support (initialising EL2 mode for later
   installing KVM support, hypervisor stub).
 - Signal handling corner case fix (alternative signal stack set up for a
   SEGV handler, which is raised in response to RLIMIT_STACK being
   reached).
 - Sub-nanosecond timer error fix.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJQx1TPAAoJEGvWsS0AyF7xSrEP/R7KPhKSKIJKW0n3nP/uGe5g
 isUiTM+y4koGzeHShao8I7VUXZLJptYHiviy12Rf0S/IK0L25P1p29ABLndd8SPB
 5lqQehLz35bAIzmRXypvz4szpCwlRXPzEcHX7cnid0Nv27A9hVpfssYM2HIKLIJN
 1AXZAxjlNmPHCc+hd+QOnP8d7h6KGiZWqiC1lsuU12Ma4oZIwiS225oxUdMg5d4I
 AxfWAvVLy14eNxDRqBgA0W2Jxe62TD82LrgD4tP88mbwWsFIyE5dea2yYShOJnBe
 mwLWw4Jovfe5VLSn00yggqM5JPp36sM/7Bka5EZaGKY2HllVtSwqnshUChG3fw3/
 fepN4nB0L8lPgTMfQAUjNKqZWgt2vwIGC+7GLX+Sg6/kOidRaxsQgU710gNvceZu
 E417RTtW4WM8IA+euCTiq3huJt7iOt8APSblpPWnrf8M7ntJKV4ESTOhtN30mR2D
 ZYeMZp1DYrET3Pxkd+bMdaRYGhMqAlpfCF096H+A4FscicbDLC+KincWtW/YpOXE
 voWDxE/Rd+3nAhCVL+A2HUSw9lNddsFvxRR9hQWfQ3uvMiDp7AS6O4EAYcK60GiA
 YsEnksMQr/ksscNf/7nvpY6DBNkeuZjj9IGfbFYVqWZ80f//8NEoJCNDzNPlATHU
 ddPpD5ZayUQ3UUMulQGg
 =fQ+2
 -----END PGP SIGNATURE-----

Merge tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull ARM64 updates from Catalin Marinas:

 - Generic execve, kernel_thread, fork/vfork/clone.

 - Preparatory patches for KVM support (initialising EL2 mode for later
   installing KVM support, hypervisor stub).

 - Signal handling corner case fix (alternative signal stack set up for
   a SEGV handler, which is raised in response to RLIMIT_STACK being
   reached).

 - Sub-nanosecond timer error fix.

* tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: (30 commits)
  arm64: Update the MAINTAINERS entry
  arm64: compat for clock_adjtime(2) is miswired
  arm64: move FP-SIMD save/restore code to a macro
  arm64: hyp: initialize vttbr_el2 to zero
  arm64: add hypervisor stub
  arm64: record boot mode when entering the kernel
  arm64: move vector entry macro to assembler.h
  arm64: add AArch32 execution modes to ptrace.h
  arm64: expand register mapping between AArch32 and AArch64
  arm64: generic timer: use virtual counter instead of physical at EL0
  arm64: vdso: defer shifting of nanosecond component of timespec
  arm64: vdso: rework __do_get_tspec register allocation and return shift
  arm64: vdso: check sequence counter even for coarse realtime operations
  arm64: vdso: fix clocksource mask when extracting bottom 56 bits
  ARM64: Remove incorrect Kconfig symbol HAVE_SPARSE_IRQ
  Documentation: Fixes a word in Documentation/arm64/memory.txt
  arm64: Make !dirty ptes read-only
  arm64: Convert empty flush_cache_{mm,page} functions to static inline
  arm64: signal: let the compiler inline compat_get_sigframe
  arm64: signal: return struct rt_sigframe from get_sigframe
  ...

Conflicts:
	arch/arm64/include/asm/unistd32.h
2012-12-12 07:49:02 -08:00
Linus Torvalds 090f8ccba3 Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
 "Lots of activity:

   211 files changed, 8328 insertions(+), 4116 deletions(-)

  most of it on the tooling side.

  Main changes:

   * ftrace enhancements and fixes from Steve Rostedt.

   * uprobes fixes, cleanups and preparation for the ARM port from Oleg
     Nesterov.

   * UAPI fixes, from David Howels - prepares the arch/x86 UAPI
     transition

   * Separate perf tests into multiple objects, one per test, from Jiri
     Olsa.

   * Make hardware event translations available in sysfs, from Jiri
     Olsa.

   * Fixes to /proc/pid/maps parsing, preparatory to supporting data
     maps, from Namhyung Kim

   * Implement ui_progress for GTK, from Namhyung Kim

   * Add framework for automated perf_event_attr tests, where tools with
     different command line options will be run from a 'perf test', via
     python glue, and the perf syscall will be intercepted to verify
     that the perf_event_attr fields set by the tool are those expected,
     from Jiri Olsa

   * Add a 'link' method for hists, so that we can have the leader with
     buckets for all the entries in all the hists.  This new method is
     now used in the default 'diff' output, making the sum of the
     'baseline' column be 100%, eliminating blind spots.

   * libtraceevent fixes for compiler warnings trying to make perf it
     build on some distros, like fedora 14, 32-bit, some of the warnings
     really pointed to real bugs.

   * Add a browser for 'perf script' and make it available from the
     report and annotate browsers.  It does filtering to find the
     scripts that handle events found in the perf.data file used.  From
     Feng Tang

   * perf inject changes to allow showing where a task sleeps, from
     Andrew Vagin.

   * Makefile improvements from Namhyung Kim.

   * Add --pre and --post command hooks in 'stat', from Peter Zijlstra.

   * Don't stop synthesizing threads when one vanishes, this is for the
     existing threads when we start a tool like trace.

   * Use sched:sched_stat_runtime to provide a thread summary, this
     produces the same output as the 'trace summary' subcommand of
     tglx's original "trace" tool.

   * Support interrupted syscalls in 'trace'

   * Add an event duration column and filter in 'trace'.

   * There are references to the man pages in some tools, so try to
     build Documentation when installing, warning the user if that is
     not possible, from Borislav Petkov.

   * Give user better message if precise is not supported, from David
     Ahern.

   * Try to find cross-built objdump path by using the session
     environment information in the perf.data file header, from Irina
     Tirdea, original patch and idea by Namhyung Kim.

   * Diplays more output on features check for make V=1, so that one can
     figure out what is happening by looking at gcc output, etc.  From
     Jiri Olsa.

   * Add on_exit implementation for systems without one, e.g.  Android,
     from Bernhard Rosenkraenzer.

   * Only process events for vcpus of interest, helps handling large
     number of events, from David Ahern.

   * Cross compilation fixes for Android, from Irina Tirdea.

   * Add documentation on compiling for Android, from Irina Tirdea.

   * perf diff improvements from Jiri Olsa.

   * Target (task/user/cpu/syswide) handling improvements, from Namhyung
     Kim.

   * Add support in 'trace' for tracing workload given by command line,
     from Namhyung Kim.

   * ... and much more."

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (194 commits)
  uprobes: Use percpu_rw_semaphore to fix register/unregister vs dup_mmap() race
  perf evsel: Introduce is_group_member method
  perf powerpc: Use uapi/unistd.h to fix build error
  tools: Pass the target in descend
  tools: Honour the O= flag when tool build called from a higher Makefile
  tools: Define a Makefile function to do subdir processing
  perf ui: Always compile browser setup code
  perf ui: Add ui_progress__finish()
  perf ui gtk: Implement ui_progress functions
  perf ui: Introduce generic ui_progress helper
  perf ui tui: Move progress.c under ui/tui directory
  perf tools: Add basic event modifier sanity check
  perf tools: Omit group members from perf_evlist__disable/enable
  perf tools: Ensure single disable call per event in record comand
  perf tools: Fix 'disabled' attribute config for record command
  perf tools: Fix attributes for '{}' defined event groups
  perf tools: Use sscanf for parsing /proc/pid/maps
  perf tools: Add gtk.<command> config option for launching GTK browser
  perf tools: Fix compile error on NO_NEWT=1 build
  perf hists: Initialize all of he->stat with zeroes
  ...
2012-12-11 18:14:31 -08:00
Linus Torvalds b58ed041a3 Device tree changes for v3.8
Bug fixes, little cleanups, and documentation changes. The most invasive
 thing here touches a bunch of the arch directories to use a common build
 rule for .dtb files. There are no major changes to functionality here
 other than a ew new helper functions.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJQx2/sAAoJEEFnBt12D9kB8aYP/iInsIXDi6c0sGRNgYoFBZUH
 pGZH/PGcZjDD2WPUOos56KTDsWt2kIZm/4ck1mBmXMD5pKM4znIQyMTkhKFiyO0l
 CARwCjyRuaHQJHt88Pcaqhk34HGLgV7ntImMHwpIn0mNbjx7hruk9aU9Jqdcd32j
 2ANbUYU9ikgq0e9s/+xQfB6QZxH1zecQkMalhQWvihtVybpG3xW67IROZv/69uL0
 OtHZZJ7nCwXcEb84rcEHU781tO0CoQhr/pId7DirQEKaD8oNLHsejFEgGEFfFrvZ
 eFmJP/YmZh7Ll+NNTMHnQwyDNa2LFuLazbjaqCqUHQgcw9daFFeP5ga3Uqp7WZbU
 4kIxBQJ3byELnttFVQbsMQag+IAgmgfp8YdJFk3VTJDJKwpMJAO1sQeoEUHnnWAr
 cyyCzROaFt1hUkhRiXso+IYNLvb60o0/2NJRTiObPdljy9OSXW6O3wFEGk9F/6u0
 jgl9tisfLUL0orKnJ5tR3kbHaJKQd+6HgBRJNiuB+9FYO43j1cY/sYggSNCkiCMy
 RvlGYDCJ+lfmZdZ4T+QYLpjsOenFosV0JZGU6MVlZmEGzTtLyhALZQKNHuxLw1Nc
 oTe8Fx5aJrWEYe/HGqm4C43DqEiQUCmZ9NPae0JyfocmjuwARSnepvWe1XZNa/8t
 aNfK6UkTO/IL3zOtOHfd
 =LB3n
 -----END PGP SIGNATURE-----

Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux-2.6

Pull device tree changes from Grant Likely:
 "Here are the DT changes I've got queued up for v3.8.  As described
  below, there are a lot of bug fixes here and documentation updates but
  nothing major:

  Bug fixes, little cleanups, and documentation changes.  The most
  invasive thing here touches a bunch of the arch directories to use a
  common build rule for .dtb files.  There are no major changes to
  functionality here other than a few new helper functions."

* tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux-2.6: (34 commits)
  arm64: Fix the dtbs target building
  mtd: nand: davinci: fix the binding documentation
  rtc: rtc-mv: Add the device tree binding documentation
  devicetree/bindings: Move gpio-leds binding into leds directory
  of/vendor-prefixes: add Imagination Technologies
  microblaze: use new common dtc rule
  c6x: use new common dtc rule
  openrisc: use new common dtc rule
  arm64: Add dtbs target for building all the enabled dtb files
  arm64: use new common dtc rule
  ARM: dt: change .dtb build rules to build in dts directory
  kbuild: centralize .dts->.dtb rule
  Fix build when CONFIG_W1_MASTER_GPIO=m b exporting "allnodes"
  of/spi: Honour "status=disabled" property of device
  of_mdio: Honour "status=disabled" property of device
  of_i2c: Honour "status=disabled" property of device
  powerpc: Fix fallout from device_node->name constification
  of: add 'const' for of_parse_phandle parameter *np
  Documentation: correct of_platform_populate() argument list
  script: dtc: clean generated files
  ...
2012-12-11 11:30:41 -08:00
Catalin Marinas 58fea354d8 arm64: Fix the dtbs target building
The arch/arm64/Makefile was not passing the right target to the
boot/dts/Makefile.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-12-10 20:24:57 -06:00
Ingo Molnar cc1b39dbf9 Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core
Pull ftrace updates from Steve Rostedt.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-12-08 15:54:35 +01:00
Al Viro 18a80376dd arm64: compat for clock_adjtime(2) is miswired
struct timex is different on arm and arm64; adjtimex(2) takes care to
convert, clock_adjtime(2) doesn't...

Signed-off-by: Al Viro <viro@ZenIV.linux.org.uk>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: <stable@vger.kernel.org>
2012-12-05 12:04:59 +00:00
Marc Zyngier cfc5180e5a arm64: move FP-SIMD save/restore code to a macro
In order to be able to reuse the save-restore code in KVM, move
it to a pair of macros, similar to what the 32bit code does.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05 11:26:50 +00:00
Marc Zyngier 7dbfbe5b2f arm64: hyp: initialize vttbr_el2 to zero
The architecture doesn't mandate any reset value for vttbr_el2.
Better set it to a known value before some HYP code gets confused.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2012-12-05 11:26:50 +00:00