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Commit Graph

229 Commits

Author SHA1 Message Date
gengdongjiu
c4335fdd38 ACPI: APEI: fix the wrong iteration of generic error status block
The revision 0x300 generic error data entry is different
from the old version, but currently iterating through the
GHES estatus blocks does not take into account this difference.
This will lead to failure to get the right data entry if GHES
has revision 0x300 error data entry.

Update the GHES estatus iteration macro to properly increment using
acpi_hest_get_next(), and correct the iteration termination condition
because the status block data length only includes error data
length.

Convert the CPER estatus checking and printing iteration logic
to use same macro.

Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Tested-by: Tyler Baicar <tbaicar@codeaurora.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-08-24 03:29:46 +02:00
Loc Ho
bdb9458a33 ACPI: APEI: Enable APEI multiple GHES source to share a single external IRQ
X-Gene platforms describe multiple GHES error sources with the same
hardware error notification type (external interrupt) and interrupt
number.

Change the GHES interrupt request to support sharing the same IRQ.

This change includs contributions from Tuan Phan <tphan@apm.com>.

Signed-off-by: Loc Ho <lho@apm.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-31 13:09:39 +02:00
Linus Torvalds
55a7b2125c arm64 updates for 4.13:
- RAS reporting via GHES/APEI (ACPI)
 - Indirect ftrace trampolines for modules
 - Improvements to kernel fault reporting
 - Page poisoning
 - Sigframe cleanups and preparation for SVE context
 - Core dump fixes
 - Sparse fixes (mainly relating to endianness)
 - xgene SoC PMU v3 driver
 - Misc cleanups and non-critical fixes
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Will Deacon:

 - RAS reporting via GHES/APEI (ACPI)

 - Indirect ftrace trampolines for modules

 - Improvements to kernel fault reporting

 - Page poisoning

 - Sigframe cleanups and preparation for SVE context

 - Core dump fixes

 - Sparse fixes (mainly relating to endianness)

 - xgene SoC PMU v3 driver

 - Misc cleanups and non-critical fixes

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (75 commits)
  arm64: fix endianness annotation for 'struct jit_ctx' and friends
  arm64: cpuinfo: constify attribute_group structures.
  arm64: ptrace: Fix incorrect get_user() use in compat_vfp_set()
  arm64: ptrace: Remove redundant overrun check from compat_vfp_set()
  arm64: ptrace: Avoid setting compat FP[SC]R to garbage if get_user fails
  arm64: fix endianness annotation for __apply_alternatives()/get_alt_insn()
  arm64: fix endianness annotation in get_kaslr_seed()
  arm64: add missing conversion to __wsum in ip_fast_csum()
  arm64: fix endianness annotation in acpi_parking_protocol.c
  arm64: use readq() instead of readl() to read 64bit entry_point
  arm64: fix endianness annotation for reloc_insn_movw() & reloc_insn_imm()
  arm64: fix endianness annotation for aarch64_insn_write()
  arm64: fix endianness annotation in aarch64_insn_read()
  arm64: fix endianness annotation in call_undef_hook()
  arm64: fix endianness annotation for debug-monitors.c
  ras: mark stub functions as 'inline'
  arm64: pass endianness info to sparse
  arm64: ftrace: fix !CONFIG_ARM64_MODULE_PLTS kernels
  arm64: signal: Allow expansion of the signal frame
  acpi: apei: check for pending errors when probing GHES entries
  ...
2017-07-05 17:09:27 -07:00
Linus Torvalds
4422d80ed7 Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS updates from Thomas Gleixner:
 "The RAS updates for the 4.13 merge window:

   - Cleanup of the MCE injection facility (Borsilav Petkov)

   - Rework of the AMD/SMCA handling (Yazen Ghannam)

   - Enhancements for ACPI/APEI to handle new notitication types (Shiju
     Jose)

   - atomic_t to refcount_t conversion (Elena Reshetova)

   - A few fixes and enhancements all over the place"

* 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  RAS/CEC: Check the correct variable in the debugfs error handling
  x86/mce: Always save severity in machine_check_poll()
  x86/MCE, xen/mcelog: Make /dev/mcelog registration messages more precise
  x86/mce: Update bootlog description to reflect behavior on AMD
  x86/mce: Don't disable MCA banks when offlining a CPU on AMD
  x86/mce/mce-inject: Preset the MCE injection struct
  x86/mce: Clean up include files
  x86/mce: Get rid of register_mce_write_callback()
  x86/mce: Merge mce_amd_inj into mce-inject
  x86/mce/AMD: Use saved threshold block info in interrupt handler
  x86/mce/AMD: Use msr_stat when clearing MCA_STATUS
  x86/mce/AMD: Carve out SMCA bank configuration
  x86/mce/AMD: Redo error logging from APIC LVT interrupt handlers
  x86/mce: Convert threshold_bank.cpus from atomic_t to refcount_t
  RAS: Make local function parse_ras_param() static
  ACPI/APEI: Handle GSIV and GPIO notification types
2017-07-03 18:33:03 -07:00
Tyler Baicar
77b246b32b acpi: apei: check for pending errors when probing GHES entries
Check for pending errors when probing GHES entries. It is possible
that a fatal error is already pending at this point, so we should
handle it as soon as the driver is probed. This also avoids a
potential issue if there was an interrupt that was already
cleared for an error since the GHES driver wasn't present.

Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-06-22 20:19:59 +01:00
Tyler Baicar
621f48e40e arm/arm64: KVM: add guest SEA support
Currently external aborts are unsupported by the guest abort
handling. Add handling for SEAs so that the host kernel reports
SEAs which occur in the guest kernel.

When an SEA occurs in the guest kernel, the guest exits and is
routed to kvm_handle_guest_abort(). Prior to this patch, a print
message of an unsupported FSC would be printed and nothing else
would happen. With this patch, the code gets routed to the APEI
handling of SEAs in the host kernel to report the SEA information.

Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-06-22 18:22:05 +01:00
Tyler Baicar
e9279e83ad trace, ras: add ARM processor error trace event
Currently there are trace events for the various RAS
errors with the exception of ARM processor type errors.
Add a new trace event for such errors so that the user
will know when they occur. These trace events are
consistent with the ARM processor error section type
defined in UEFI 2.6 spec section N.2.4.4.

Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-06-22 18:22:05 +01:00
Tyler Baicar
297b64c743 ras: acpi / apei: generate trace event for unrecognized CPER section
The UEFI spec includes non-standard section type support in the
Common Platform Error Record. This is defined in section N.2.3 of
UEFI version 2.5.

Currently if the CPER section's type (UUID) does not match any
section type that the kernel knows how to parse, a trace event is
not generated.

Generate a trace event which contains the raw error data for
non-standard section type error records.

Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
CC: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Tested-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-06-22 18:22:04 +01:00
Jonathan (Zhixiong) Zhang
2fb5853e44 acpi: apei: panic OS with fatal error status block
Even if an error status block's severity is fatal, the kernel does not
honor the severity level and panic.

With the firmware first model, the platform could inform the OS about a
fatal hardware error through the non-NMI GHES notification type. The OS
should panic when a hardware error record is received with this
severity.

Call panic() after CPER data in error status block is printed if
severity is fatal, before each error section is handled.

Signed-off-by: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
Reviewed-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-06-22 18:22:04 +01:00
Tyler Baicar
7edda0886b acpi: apei: handle SEA notification type for ARMv8
ARM APEI extension proposal added SEA (Synchronous External Abort)
notification type for ARMv8.
Add a new GHES error source handling function for SEA. If an error
source's notification type is SEA, then this function can be registered
into the SEA exception handler. That way GHES will parse and report
SEA exceptions when they occur.
An SEA can interrupt code that had interrupts masked and is treated as
an NMI. To aid this the page of address space for mapping APEI buffers
while in_nmi() is always reserved, and ghes_ioremap_pfn_nmi() is
changed to use the helper methods to find the prot_t to map with in
the same way as ghes_ioremap_pfn_irq().

Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
CC: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Reviewed-by: James Morse <james.morse@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-06-22 18:22:03 +01:00
Tyler Baicar
bbcc2e7b64 ras: acpi/apei: cper: add support for generic data v3 structure
The ACPI 6.1 spec adds a new revision of the generic error data
entry structure. Add support to handle the new structure as well
as properly verify and iterate through the generic data entries.

Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
CC: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-06-22 15:43:47 +01:00
Tyler Baicar
42aa560446 acpi: apei: read ack upon ghes record consumption
A RAS (Reliability, Availability, Serviceability) controller
may be a separate processor running in parallel with OS
execution, and may generate error records for consumption by
the OS. If the RAS controller produces multiple error records,
then they may be overwritten before the OS has consumed them.

The Generic Hardware Error Source (GHES) v2 structure
introduces the capability for the OS to acknowledge the
consumption of the error record generated by the RAS
controller. A RAS controller supporting GHESv2 shall wait for
the acknowledgment before writing a new error record, thus
eliminating the race condition.

Add support for parsing of GHESv2 sub-tables as well.

Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
CC: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Reviewed-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-06-22 15:43:47 +01:00
Andy Shevchenko
5b53696a30 ACPI / APEI: Switch to use new generic UUID API
There are new types and helpers that are supposed to be used in new code.

As a preparation to get rid of legacy types and API functions do
the conversion here.

Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2017-06-05 19:42:02 +02:00
Shiju Jose
7bf130e4a0 ACPI/APEI: Handle GSIV and GPIO notification types
System Controller Interrupts are received by ACPI's error device, which
in turn notifies the GHES code. The same is true of APEI's GSIV and
GPIO notification types. Add support for GSIV and GPIO sharing the SCI
register/unregister/notifier code. Rename the list and notifier to show
this is no longer just SCI, but anything from the Hardware Error Device.

Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
[ Rewrite commit log. ]
Signed-off-by: James Morse <james.morse@arm.com>
[ Some small cleanups ontop. ]
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Tyler Baicar <tbaicar@codeaurora.org>
Reviewed-by: James Morse <james.morse@arm.com>
Link: http://lkml.kernel.org/r/86258A5CC0A3704780874CF6004BA8A62E695201@FRAEML521-MBX.china.huawei.com
Cc: "Guohanjun (Hanjun Guo)" <guohanjun@huawei.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: "Zhengqiang (turing)" <zhengqiang10@huawei.com>
Cc: "fu.wei@linaro.org" <fu.wei@linaro.org>
Cc: "xuwei (O)" <xuwei5@hisilicon.com>
Cc: Gabriele Paoloni <gabriele.paoloni@huawei.com>
Cc: Geliang Tang <geliangtang@gmail.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Punit Agrawal <punit.agrawal@arm.com>
Cc: linux-acpi@vger.kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2017-05-21 21:55:12 +02:00
Michal Hocko
752ade68cb treewide: use kv[mz]alloc* rather than opencoded variants
There are many code paths opencoding kvmalloc.  Let's use the helper
instead.  The main difference to kvmalloc is that those users are
usually not considering all the aspects of the memory allocator.  E.g.
allocation requests <= 32kB (with 4kB pages) are basically never failing
and invoke OOM killer to satisfy the allocation.  This sounds too
disruptive for something that has a reasonable fallback - the vmalloc.
On the other hand those requests might fallback to vmalloc even when the
memory allocator would succeed after several more reclaim/compaction
attempts previously.  There is no guarantee something like that happens
though.

This patch converts many of those places to kv[mz]alloc* helpers because
they are more conservative.

Link: http://lkml.kernel.org/r/20170306103327.2766-2-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> # Xen bits
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Andreas Dilger <andreas.dilger@intel.com> # Lustre
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> # KVM/s390
Acked-by: Dan Williams <dan.j.williams@intel.com> # nvdim
Acked-by: David Sterba <dsterba@suse.com> # btrfs
Acked-by: Ilya Dryomov <idryomov@gmail.com> # Ceph
Acked-by: Tariq Toukan <tariqt@mellanox.com> # mlx4
Acked-by: Leon Romanovsky <leonro@mellanox.com> # mlx5
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Santosh Raspatur <santosh@chelsio.com>
Cc: Hariprasad S <hariprasad@chelsio.com>
Cc: Yishai Hadas <yishaih@mellanox.com>
Cc: Oleg Drokin <oleg.drokin@intel.com>
Cc: "Yan, Zheng" <zyan@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-05-08 17:15:13 -07:00
Linus Torvalds
2575be8ad3 - constify compression structures; Bhumika Goyal
- restore powerpc dumping; Ankit Kumar
 - fix more bugs in the rarely exercises module unloading logic
 - reorganize filesystem locking to fix problems noticed by lockdep
 - refactor internal pstore APIs to make development and review easier:
   - improve error reporting
   - add kernel-doc structure and function comments
   - avoid insane argument passing by using a common record structure
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Merge tag 'pstore-v4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull pstore updates from Kees Cook:
 "This has a large internal refactoring along with several smaller
  fixes.

   - constify compression structures; Bhumika Goyal

   - restore powerpc dumping; Ankit Kumar

   - fix more bugs in the rarely exercises module unloading logic

   - reorganize filesystem locking to fix problems noticed by lockdep

   - refactor internal pstore APIs to make development and review
     easier:
      - improve error reporting
      - add kernel-doc structure and function comments
      - avoid insane argument passing by using a common record
        structure"

* tag 'pstore-v4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (23 commits)
  pstore: Solve lockdep warning by moving inode locks
  pstore: Fix flags to enable dumps on powerpc
  pstore: Remove unused vmalloc.h in pmsg
  pstore: simplify write_user_compat()
  pstore: Remove write_buf() callback
  pstore: Replace arguments for write_buf_user() API
  pstore: Replace arguments for write_buf() API
  pstore: Replace arguments for erase() API
  pstore: Do not duplicate record metadata
  pstore: Allocate records on heap instead of stack
  pstore: Pass record contents instead of copying
  pstore: Always allocate buffer for decompression
  pstore: Replace arguments for write() API
  pstore: Replace arguments for read() API
  pstore: Switch pstore_mkfile to pass record
  pstore: Move record decompression to function
  pstore: Extract common arguments into structure
  pstore: Add kernel-doc for struct pstore_info
  pstore: Improve register_pstore() error reporting
  pstore: Avoid race in module unloading
  ...
2017-05-02 10:35:45 -07:00
Linus Torvalds
3dee9fb2a4 Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS updates from Ingo Molnar:
 "The main changes in this cycle were:

   - add the 'Corrected Errors Collector' kernel feature which collect
     and monitor correctable errors statistics and will preemptively
     (soft-)offline physical pages that have a suspiciously high error
     count.

   - handle MCE errors during kexec() more gracefully

   - factor out and deprecate the /dev/mcelog driver

   - ... plus misc fixes and cleanpus"

* 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce: Check MCi_STATUS[MISCV] for usable addr on Intel only
  ACPI/APEI: Use setup_deferrable_timer()
  x86/mce: Update notifier priority check
  x86/mce: Enable PPIN for Knights Landing/Mill
  x86/mce: Do not register notifiers with invalid prio
  x86/mce: Factor out and deprecate the /dev/mcelog driver
  RAS: Add a Corrected Errors Collector
  x86/mce: Rename mce_log to mce_log_buffer
  x86/mce: Rename mce_log()'s argument
  x86/mce: Init some CPU features early
  x86/mce: Handle broadcasted MCE gracefully with kexec
2017-05-01 20:48:33 -07:00
Geliang Tang
7237c75b27 ACPI/APEI: Use setup_deferrable_timer()
Use setup_deferrable_timer() instead of init_timer_deferrable() to
simplify the code.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Tested-by: Tyler Baicar <tbaicar@codeaurora.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Len Brown <lenb@kernel.org>
Cc: linux-acpi@vger.kernel.org
Link: http://lkml.kernel.org/r/3afa5498142ef68256023257dad37b9f8352e65e.1489060803.git.geliangtang@gmail.com
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2017-04-19 12:00:14 +02:00
James Morse
7d64f82cce ACPI / APEI: Add missing synchronize_rcu() on NOTIFY_SCI removal
When removing a GHES device notified by SCI, list_del_rcu() is used,
ghes_remove() should call synchronize_rcu() before it goes on to call
kfree(ghes), otherwise concurrent RCU readers may still hold this list
entry after it has been freed.

Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: "Huang, Ying" <ying.huang@intel.com>
Fixes: 81e88fdc43 (ACPI, APEI, Generic Hardware Error Source POLL/IRQ/NMI notification type support)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-03-28 23:43:42 +02:00
Kees Cook
a61072aae6 pstore: Replace arguments for erase() API
This removes the argument list for the erase() callback and replaces it
with a pointer to the backend record details to be removed.

Signed-off-by: Kees Cook <keescook@chromium.org>
2017-03-07 14:01:00 -08:00
Kees Cook
76cc9580e3 pstore: Replace arguments for write() API
Similar to the pstore_info read() callback, there were too many arguments.
This switches to the new struct pstore_record pointer instead. This adds
"reason" and "part" to the record structure as well.

Signed-off-by: Kees Cook <keescook@chromium.org>
2017-03-07 14:00:56 -08:00
Kees Cook
125cc42baf pstore: Replace arguments for read() API
The argument list for the pstore_read() interface is unwieldy. This changes
passes the new struct pstore_record instead. The erst backend was already
doing something similar internally.

Signed-off-by: Kees Cook <keescook@chromium.org>
2017-03-07 14:00:55 -08:00
Linus Torvalds
1827adb11a Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull sched.h split-up from Ingo Molnar:
 "The point of these changes is to significantly reduce the
  <linux/sched.h> header footprint, to speed up the kernel build and to
  have a cleaner header structure.

  After these changes the new <linux/sched.h>'s typical preprocessed
  size goes down from a previous ~0.68 MB (~22K lines) to ~0.45 MB (~15K
  lines), which is around 40% faster to build on typical configs.

  Not much changed from the last version (-v2) posted three weeks ago: I
  eliminated quirks, backmerged fixes plus I rebased it to an upstream
  SHA1 from yesterday that includes most changes queued up in -next plus
  all sched.h changes that were pending from Andrew.

  I've re-tested the series both on x86 and on cross-arch defconfigs,
  and did a bisectability test at a number of random points.

  I tried to test as many build configurations as possible, but some
  build breakage is probably still left - but it should be mostly
  limited to architectures that have no cross-compiler binaries
  available on kernel.org, and non-default configurations"

* 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (146 commits)
  sched/headers: Clean up <linux/sched.h>
  sched/headers: Remove #ifdefs from <linux/sched.h>
  sched/headers: Remove the <linux/topology.h> include from <linux/sched.h>
  sched/headers, hrtimer: Remove the <linux/wait.h> include from <linux/hrtimer.h>
  sched/headers, x86/apic: Remove the <linux/pm.h> header inclusion from <asm/apic.h>
  sched/headers, timers: Remove the <linux/sysctl.h> include from <linux/timer.h>
  sched/headers: Remove <linux/magic.h> from <linux/sched/task_stack.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/init.h>
  sched/core: Remove unused prefetch_stack()
  sched/headers: Remove <linux/rculist.h> from <linux/sched.h>
  sched/headers: Remove the 'init_pid_ns' prototype from <linux/sched.h>
  sched/headers: Remove <linux/signal.h> from <linux/sched.h>
  sched/headers: Remove <linux/rwsem.h> from <linux/sched.h>
  sched/headers: Remove the runqueue_is_locked() prototype
  sched/headers: Remove <linux/sched.h> from <linux/sched/hotplug.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/debug.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/nohz.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/stat.h>
  sched/headers: Remove the <linux/gfp.h> include from <linux/sched.h>
  sched/headers: Remove <linux/rtmutex.h> from <linux/sched.h>
  ...
2017-03-03 10:16:38 -08:00
Ingo Molnar
e601757102 sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>
We are going to split <linux/sched/clock.h> out of <linux/sched.h>, which
will have to be picked up from other headers and .c files.

Create a trivial placeholder <linux/sched/clock.h> file that just
maps to <linux/sched.h> to make this patch obviously correct and
bisectable.

Include the new header in the files that are going to need it.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-03-02 08:42:27 +01:00
Huang Ying
41139ac3cd ACPI: APEI: Fix BERT resources conflict with ACPI NVS area
It was reported that on some machines, there is overlap between ACPI
NVS area and BERT address range.  This appears reasonable because BERT
contents need to be non-volatile across reboot.  But this will cause
resources conflict in current Linux kernel implementation because the
ACPI NVS area is marked as busy.  The resource conflict is fixed via
excluding the ACPI NVS area when requesting IO resources for BERT.
When accessing the BERT contents, the whole BERT address range will be
ioremapped and accessed.

Reported-and-tested-by: Hans Kristian Rosbach <hansr@raskesider.no>
Signed-off-by: Ying Huang <ying.huang@intel.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-02-27 22:53:11 +01:00
Colin Ian King
d222678426 ACPI, APEI, EINJ: fix malformed newline escape
The pr_warn message has a malformed newline escape, add in the
missing \

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-01-31 22:39:54 +01:00
Tomasz Nowicki
9f9a35a7b6 ACPI / APEI / ARM64: APEI initial support for ARM64
This patch provides APEI arch-specific bits for ARM64

Meanwhile,
 (1) Move HEST type (ACPI_HEST_TYPE_IA32_CORRECTED_CHECK) checking to
     a generic place.
 (2) Select HAVE_ACPI_APEI when EFI and ACPI is set on ARM64, because
     arch_apei_get_mem_attribute is using efi_mem_attributes() on
     ARM64.

Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Tested-by: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Signed-off-by: Fu Wei <fu.wei@linaro.org>
[ Fu Wei: improve && upstream ]
Acked-by: Hanjun Guo <hanjun.guo@linaro.org>
Tested-by: Tyler Baicar <tbaicar@codeaurora.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-12-02 00:24:34 +01:00
Prarit Bhargava
a545715d2d ACPI / APEI: Fix NMI notification handling
When removing and adding cpu 0 on a system with GHES NMI the following stack
trace is seen when re-adding the cpu:

WARNING: CPU: 0 PID: 0 at arch/x86/kernel/apic/apic.c:1349 setup_local_APIC+
Modules linked in: nfsv3 rpcsec_gss_krb5 nfsv4 nfs fscache coretemp intel_ra
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.0-rc6+ #2
Call Trace:
 dump_stack+0x63/0x8e
 __warn+0xd1/0xf0
 warn_slowpath_null+0x1d/0x20
 setup_local_APIC+0x275/0x370
 apic_ap_setup+0xe/0x20
 start_secondary+0x48/0x180
 set_init_arg+0x55/0x55
 early_idt_handler_array+0x120/0x120
 x86_64_start_reservations+0x2a/0x2c
 x86_64_start_kernel+0x13d/0x14c

During the cpu bringup, wakeup_cpu_via_init_nmi() is called and issues an
NMI on CPU 0.  The GHES NMI handler, ghes_notify_nmi() runs the
ghes_proc_irq_work work queue which ends up setting IRQ_WORK_VECTOR
(0xf6).  The "faulty" IR line set at arch/x86/kernel/apic/apic.c:1349 is  also
0xf6 (specifically APIC IRR for irqs 255 to 224 is 0x400000) which confirms
that something has set the IRQ_WORK_VECTOR line prior to the APIC being
initialized.

Commit 2383844d48 ("GHES: Elliminate double-loop in the NMI handler")
incorrectly modified the behavior such that the handler returns
NMI_HANDLED only if an error was processed, and incorrectly runs the ghes
work queue for every NMI.

This patch modifies the ghes_proc_irq_work() to run as it did prior to
2383844d48 ("GHES: Elliminate double-loop in the NMI handler") by
properly returning NMI_HANDLED and only calling the work queue if
NMI_HANDLED has been set.

Fixes: 2383844d48 (GHES: Elliminate double-loop in the NMI handler)
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-12-02 00:20:02 +01:00
Punit Agrawal
806487a8fc ACPI / APEI: Fix incorrect return value of ghes_proc()
Although ghes_proc() tests for errors while reading the error status,
it always return success (0). Fix this by propagating the return
value.

Fixes: d334a49113 (ACPI, APEI, Generic Hardware Error Source memory error support)
Signed-of-by: Punit Agrawal <punit.agrawa.@arm.com>
Tested-by: Tyler Baicar <tbaicar@codeaurora.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
[ rjw: Subject ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-10-24 14:32:14 +02:00
Linus Torvalds
e6e3d8f8f4 PCI changes for the v4.9 merge window:
Enumeration
     microblaze: Add multidomain support for procfs (Bharat Kumar Gogada)
 
   Resource management
     Ignore requested alignment for PROBE_ONLY and fixed resources (Yongji Xie)
     Ignore requested alignment for VF BARs (Yongji Xie)
 
   PCI device hotplug
     Make core explicitly non-modular (Paul Gortmaker)
 
   PCIe native device hotplug
     Rename pcie_isr() locals for clarity (Bjorn Helgaas)
     Return IRQ_NONE when we can't read interrupt status (Bjorn Helgaas)
     Remove unnecessary guard (Bjorn Helgaas)
     Clean up dmesg "Slot(%s)" messages (Bjorn Helgaas)
     Remove useless pciehp_get_latch_status() calls (Bjorn Helgaas)
     Clear attention LED on device add (Keith Busch)
     Allow exclusive userspace control of indicators (Keith Busch)
     Process all hotplug events before looking for new ones (Mayurkumar Patel)
     Don't re-read Slot Status when queuing hotplug event (Mayurkumar Patel)
     Don't re-read Slot Status when handling surprise event (Mayurkumar Patel)
     Make explicitly non-modular (Paul Gortmaker)
 
   Power management
     Afford direct-complete to devices with non-standard PM (Lukas Wunner)
     Query platform firmware for device power state (Lukas Wunner)
     Recognize D3cold in pci_update_current_state() (Lukas Wunner)
     Avoid unnecessary resume after direct-complete (Lukas Wunner)
     Make explicitly non-modular (Paul Gortmaker)
 
   Virtualization
     Mark Atheros AR9580 to avoid bus reset (Maik Broemme)
     Check for pci_setup_device() failure in pci_iov_add_virtfn() (Po Liu)
 
   MSI
     Enable PCI_MSI_IRQ_DOMAIN support for ARC (Joao Pinto)
 
   AER
     Remove aerdriver.nosourceid kernel parameter (Bjorn Helgaas)
     Remove aerdriver.forceload kernel parameter (Bjorn Helgaas)
     Fix aer_probe() kernel-doc comment (Cao jin)
     Add bus flag to skip source ID matching (Jon Derrick)
     Avoid memory allocation in interrupt handling path (Jon Derrick)
     Cache capability position (Keith Busch)
     Make explicitly non-modular (Paul Gortmaker)
     Remove duplicate AER severity translation (Tyler Baicar)
     Send correct severity to calculate AER severity (Tyler Baicar)
 
   Precision Time Measurement
     Add Precision Time Measurement (PTM) support (Jonathan Yong)
     Add PTM clock granularity information (Bjorn Helgaas)
     Add pci_enable_ptm() for drivers to enable PTM on endpoints (Bjorn Helgaas)
 
   Generic host bridge driver
     Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
     Make explicitly non-modular (Paul Gortmaker)
 
   Altera host bridge driver
     Remove redundant platform_get_resource() return value check (Bjorn Helgaas)
     Poll for link training status after retraining the link (Ley Foon Tan)
     Rework config accessors for use without a struct pci_bus (Ley Foon Tan)
     Move retrain from fixup to altera_pcie_host_init() (Ley Foon Tan)
     Make MSI explicitly non-modular (Paul Gortmaker)
     Make explicitly non-modular (Paul Gortmaker)
     Relax device number checking to allow SR-IOV (Po Liu)
 
   ARM Versatile host bridge driver
     Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
 
   Axis ARTPEC-6 host bridge driver
     Drop __init from artpec6_add_pcie_port() (Niklas Cassel)
 
   Freescale i.MX6 host bridge driver
     Make explicitly non-modular (Paul Gortmaker)
 
   Intel VMD host bridge driver
     Add quirk for AER to ignore source ID (Jon Derrick)
     Allocate IRQ lists with correct MSI-X count (Jon Derrick)
     Convert to use pci_alloc_irq_vectors() API (Jon Derrick)
     Eliminate vmd_vector member from list type (Jon Derrick)
     Eliminate index member from IRQ list (Jon Derrick)
     Synchronize with RCU freeing MSI IRQ descs (Keith Busch)
     Request userspace control of PCIe hotplug indicators (Keith Busch)
     Move VMD driver to drivers/pci/host (Keith Busch)
 
   Marvell Aardvark host bridge driver
     Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
     Remove redundant dev_err call in advk_pcie_probe() (Wei Yongjun)
 
   Microsoft Hyper-V host bridge driver
     Use zero-length array in struct pci_packet (Dexuan Cui)
     Use pci_function_description[0] in struct definitions (Dexuan Cui)
     Remove the unused 'wrk' in struct hv_pcibus_device (Dexuan Cui)
     Handle vmbus_sendpacket() failure in hv_compose_msi_msg() (Dexuan Cui)
     Handle hv_pci_generic_compl() error case (Dexuan Cui)
     Use list_move_tail() instead of list_del() + list_add_tail() (Wei Yongjun)
 
   NVIDIA Tegra host bridge driver
     Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
     Remove redundant _data suffix (Thierry Reding)
     Use of_device_get_match_data() (Thierry Reding)
 
   Qualcomm host bridge driver
     Make explicitly non-modular (Paul Gortmaker)
 
   Renesas R-Car host bridge driver
     Consolidate register space lookup and ioremap (Bjorn Helgaas)
     Don't disable/unprepare clocks on prepare/enable failure (Geert Uytterhoeven)
     Add multi-MSI support (Grigory Kletsko)
     Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
     Fix some checkpatch warnings (Sergei Shtylyov)
     Try increasing PCIe link speed to 5 GT/s at boot (Sergei Shtylyov)
 
   Rockchip host bridge driver
     Add DT bindings for Rockchip PCIe controller (Shawn Lin)
     Add Rockchip PCIe controller support (Shawn Lin)
     Improve the deassert sequence of four reset pins (Shawn Lin)
     Fix wrong transmitted FTS count (Shawn Lin)
     Increase the Max Credit update interval (Rajat Jain)
 
   Samsung Exynos host bridge driver
     Make explicitly non-modular (Paul Gortmaker)
 
   ST Microelectronics SPEAr13xx host bridge driver
     Make explicitly non-modular (Paul Gortmaker)
 
   Synopsys DesignWare host bridge driver
     Return data directly from dw_pcie_readl_rc() (Bjorn Helgaas)
     Exchange viewport of `MEMORYs' and `CFGs/IOs' (Dong Bo)
     Check LTSSM training bit before deciding link is up (Jisheng Zhang)
     Move link wait definitions to .c file (Joao Pinto)
     Wait for iATU enable (Joao Pinto)
     Add iATU Unroll feature (Joao Pinto)
     Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
     Make explicitly non-modular (Paul Gortmaker)
     Relax device number checking to allow SR-IOV (Po Liu)
     Keep viewport fixed for IO transaction if num_viewport > 2 (Pratyush Anand)
     Remove redundant platform_get_resource() return value check (Wei Yongjun)
 
   TI DRA7xx host bridge driver
     Make explicitly non-modular (Paul Gortmaker)
 
   TI Keystone host bridge driver
     Propagate request_irq() failure (Wei Yongjun)
 
   Xilinx AXI host bridge driver
     Keep both legacy and MSI interrupt domain references (Bharat Kumar Gogada)
     Clear interrupt register for invalid interrupt (Bharat Kumar Gogada)
     Clear correct MSI set bit (Bharat Kumar Gogada)
     Dispose of MSI virtual IRQ (Bharat Kumar Gogada)
     Make explicitly non-modular (Paul Gortmaker)
     Relax device number checking to allow SR-IOV (Po Liu)
 
   Xilinx NWL host bridge driver
     Expand error logging (Bharat Kumar Gogada)
     Enable all MSI interrupts using MSI mask (Bharat Kumar Gogada)
     Make explicitly non-modular (Paul Gortmaker)
 
   Miscellaneous
     Drop CONFIG_KEXEC_CORE ifdeffery (Lukas Wunner)
     portdrv: Make explicitly non-modular (Paul Gortmaker)
     Make DPC explicitly non-modular (Paul Gortmaker)
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Merge tag 'pci-v4.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Summary of PCI changes for the v4.9 merge window:

  Enumeration:
   - microblaze: Add multidomain support for procfs (Bharat Kumar Gogada)

  Resource management:
   - Ignore requested alignment for PROBE_ONLY and fixed resources (Yongji Xie)
   - Ignore requested alignment for VF BARs (Yongji Xie)

  PCI device hotplug:
   - Make core explicitly non-modular (Paul Gortmaker)

  PCIe native device hotplug:
   - Rename pcie_isr() locals for clarity (Bjorn Helgaas)
   - Return IRQ_NONE when we can't read interrupt status (Bjorn Helgaas)
   - Remove unnecessary guard (Bjorn Helgaas)
   - Clean up dmesg "Slot(%s)" messages (Bjorn Helgaas)
   - Remove useless pciehp_get_latch_status() calls (Bjorn Helgaas)
   - Clear attention LED on device add (Keith Busch)
   - Allow exclusive userspace control of indicators (Keith Busch)
   - Process all hotplug events before looking for new ones (Mayurkumar Patel)
   - Don't re-read Slot Status when queuing hotplug event (Mayurkumar Patel)
   - Don't re-read Slot Status when handling surprise event (Mayurkumar Patel)
   - Make explicitly non-modular (Paul Gortmaker)

  Power management:
   - Afford direct-complete to devices with non-standard PM (Lukas Wunner)
   - Query platform firmware for device power state (Lukas Wunner)
   - Recognize D3cold in pci_update_current_state() (Lukas Wunner)
   - Avoid unnecessary resume after direct-complete (Lukas Wunner)
   - Make explicitly non-modular (Paul Gortmaker)

  Virtualization:
   - Mark Atheros AR9580 to avoid bus reset (Maik Broemme)
   - Check for pci_setup_device() failure in pci_iov_add_virtfn() (Po Liu)

  MSI:
   - Enable PCI_MSI_IRQ_DOMAIN support for ARC (Joao Pinto)

  AER:
   - Remove aerdriver.nosourceid kernel parameter (Bjorn Helgaas)
   - Remove aerdriver.forceload kernel parameter (Bjorn Helgaas)
   - Fix aer_probe() kernel-doc comment (Cao jin)
   - Add bus flag to skip source ID matching (Jon Derrick)
   - Avoid memory allocation in interrupt handling path (Jon Derrick)
   - Cache capability position (Keith Busch)
   - Make explicitly non-modular (Paul Gortmaker)
   - Remove duplicate AER severity translation (Tyler Baicar)
   - Send correct severity to calculate AER severity (Tyler Baicar)

  Precision Time Measurement:
   - Add Precision Time Measurement (PTM) support (Jonathan Yong)
   - Add PTM clock granularity information (Bjorn Helgaas)
   - Add pci_enable_ptm() for drivers to enable PTM on endpoints (Bjorn Helgaas)

  Generic host bridge driver:
   - Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
   - Make explicitly non-modular (Paul Gortmaker)

  Altera host bridge driver:
   - Remove redundant platform_get_resource() return value check (Bjorn Helgaas)
   - Poll for link training status after retraining the link (Ley Foon Tan)
   - Rework config accessors for use without a struct pci_bus (Ley Foon Tan)
   - Move retrain from fixup to altera_pcie_host_init() (Ley Foon Tan)
   - Make MSI explicitly non-modular (Paul Gortmaker)
   - Make explicitly non-modular (Paul Gortmaker)
   - Relax device number checking to allow SR-IOV (Po Liu)

  ARM Versatile host bridge driver:
   - Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)

  Axis ARTPEC-6 host bridge driver:
   - Drop __init from artpec6_add_pcie_port() (Niklas Cassel)

  Freescale i.MX6 host bridge driver:
   - Make explicitly non-modular (Paul Gortmaker)

  Intel VMD host bridge driver:
   - Add quirk for AER to ignore source ID (Jon Derrick)
   - Allocate IRQ lists with correct MSI-X count (Jon Derrick)
   - Convert to use pci_alloc_irq_vectors() API (Jon Derrick)
   - Eliminate vmd_vector member from list type (Jon Derrick)
   - Eliminate index member from IRQ list (Jon Derrick)
   - Synchronize with RCU freeing MSI IRQ descs (Keith Busch)
   - Request userspace control of PCIe hotplug indicators (Keith Busch)
   - Move VMD driver to drivers/pci/host (Keith Busch)

  Marvell Aardvark host bridge driver:
   - Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
   - Remove redundant dev_err call in advk_pcie_probe() (Wei Yongjun)

  Microsoft Hyper-V host bridge driver:
   - Use zero-length array in struct pci_packet (Dexuan Cui)
   - Use pci_function_description[0] in struct definitions (Dexuan Cui)
   - Remove the unused 'wrk' in struct hv_pcibus_device (Dexuan Cui)
   - Handle vmbus_sendpacket() failure in hv_compose_msi_msg() (Dexuan Cui)
   - Handle hv_pci_generic_compl() error case (Dexuan Cui)
   - Use list_move_tail() instead of list_del() + list_add_tail() (Wei Yongjun)

  NVIDIA Tegra host bridge driver:
   - Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
   - Remove redundant _data suffix (Thierry Reding)
   - Use of_device_get_match_data() (Thierry Reding)

  Qualcomm host bridge driver:
   - Make explicitly non-modular (Paul Gortmaker)

  Renesas R-Car host bridge driver:
   - Consolidate register space lookup and ioremap (Bjorn Helgaas)
   - Don't disable/unprepare clocks on prepare/enable failure (Geert Uytterhoeven)
   - Add multi-MSI support (Grigory Kletsko)
   - Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
   - Fix some checkpatch warnings (Sergei Shtylyov)
   - Try increasing PCIe link speed to 5 GT/s at boot (Sergei Shtylyov)

  Rockchip host bridge driver:
   - Add DT bindings for Rockchip PCIe controller (Shawn Lin)
   - Add Rockchip PCIe controller support (Shawn Lin)
   - Improve the deassert sequence of four reset pins (Shawn Lin)
   - Fix wrong transmitted FTS count (Shawn Lin)
   - Increase the Max Credit update interval (Rajat Jain)

  Samsung Exynos host bridge driver:
   - Make explicitly non-modular (Paul Gortmaker)

  ST Microelectronics SPEAr13xx host bridge driver:
   - Make explicitly non-modular (Paul Gortmaker)

  Synopsys DesignWare host bridge driver:
   - Return data directly from dw_pcie_readl_rc() (Bjorn Helgaas)
   - Exchange viewport of `MEMORYs' and `CFGs/IOs' (Dong Bo)
   - Check LTSSM training bit before deciding link is up (Jisheng Zhang)
   - Move link wait definitions to .c file (Joao Pinto)
   - Wait for iATU enable (Joao Pinto)
   - Add iATU Unroll feature (Joao Pinto)
   - Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
   - Make explicitly non-modular (Paul Gortmaker)
   - Relax device number checking to allow SR-IOV (Po Liu)
   - Keep viewport fixed for IO transaction if num_viewport > 2 (Pratyush Anand)
   - Remove redundant platform_get_resource() return value check (Wei Yongjun)

  TI DRA7xx host bridge driver:
   - Make explicitly non-modular (Paul Gortmaker)

  TI Keystone host bridge driver:
   - Propagate request_irq() failure (Wei Yongjun)

  Xilinx AXI host bridge driver:
   - Keep both legacy and MSI interrupt domain references (Bharat Kumar Gogada)
   - Clear interrupt register for invalid interrupt (Bharat Kumar Gogada)
   - Clear correct MSI set bit (Bharat Kumar Gogada)
   - Dispose of MSI virtual IRQ (Bharat Kumar Gogada)
   - Make explicitly non-modular (Paul Gortmaker)
   - Relax device number checking to allow SR-IOV (Po Liu)

  Xilinx NWL host bridge driver:
   - Expand error logging (Bharat Kumar Gogada)
   - Enable all MSI interrupts using MSI mask (Bharat Kumar Gogada)
   - Make explicitly non-modular (Paul Gortmaker)

  Miscellaneous:
   - Drop CONFIG_KEXEC_CORE ifdeffery (Lukas Wunner)
   - portdrv: Make explicitly non-modular (Paul Gortmaker)
   - Make DPC explicitly non-modular (Paul Gortmaker)"

* tag 'pci-v4.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (105 commits)
  x86/PCI: VMD: Move VMD driver to drivers/pci/host
  PCI: rockchip: Fix wrong transmitted FTS count
  PCI: rockchip: Improve the deassert sequence of four reset pins
  PCI: rockchip: Increase the Max Credit update interval
  PCI: rcar: Try increasing PCIe link speed to 5 GT/s at boot
  PCI/AER: Fix aer_probe() kernel-doc comment
  PCI: Ignore requested alignment for VF BARs
  PCI: Ignore requested alignment for PROBE_ONLY and fixed resources
  PCI: Avoid unnecessary resume after direct-complete
  PCI: Recognize D3cold in pci_update_current_state()
  PCI: Query platform firmware for device power state
  PCI: Afford direct-complete to devices with non-standard PM
  PCI/AER: Cache capability position
  PCI/AER: Avoid memory allocation in interrupt handling path
  x86/PCI: VMD: Request userspace control of PCIe hotplug indicators
  PCI: pciehp: Allow exclusive userspace control of indicators
  ACPI / APEI: Send correct severity to calculate AER severity
  PCI/AER: Remove duplicate AER severity translation
  x86/PCI: VMD: Synchronize with RCU freeing MSI IRQ descs
  x86/PCI: VMD: Eliminate index member from IRQ list
  ...
2016-10-07 11:46:37 -07:00
Tyler Baicar
2458d66b24 ACPI / APEI: Send correct severity to calculate AER severity
Currently the AER severity is calculated by calling cper_severity_to_aer(),
but the parameter sent is actually the GHES severity.  This causes the AER
severity to be incorrect.

Fix the parameter to be the CPER severity instead of the GHES severity.

Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
2016-09-20 14:36:59 -05:00
Namhyung Kim
c950fd6f20 pstore: Split pstore fragile flags
This patch adds new PSTORE_FLAGS for each pstore type so that they can
be enabled separately.  This is a preparation for ongoing virtio-pstore
work to support those types flexibly.

The PSTORE_FLAGS_FRAGILE is changed to PSTORE_FLAGS_DMESG to preserve the
original behavior.

Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Len Brown <lenb@kernel.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: linux-acpi@vger.kernel.org
Cc: linux-efi@vger.kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
[kees: retained "FRAGILE" for now to make merges easier]
Signed-off-by: Kees Cook <keescook@chromium.org>
2016-09-08 15:01:08 -07:00
Linus Torvalds
1b3fc0bef8 pstore subsystem updates for v4.8
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Merge tag 'pstore-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

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

* tag 'pstore-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  pstore/ram: add Device Tree bindings
  efi-pstore: implement efivars_pstore_exit()
  pstore: drop file opened reference count
  pstore: add lzo/lz4 compression support
  pstore: Cleanup pstore_dump()
  pstore: Enable compression on normal path (again)
  ramoops: Only unregister when registered
2016-07-26 18:48:23 -07:00
Huang Ying
a3e2acc5e3 ACPI / APEI: Add Boot Error Record Table (BERT) support
ACPI/APEI is designed to verifiy/report H/W errors, like Corrected
Error(CE) and Uncorrected Error(UC). It contains four tables: HEST,
ERST, EINJ and BERT. The first three tables have been merged for
a long time, but because of lacking BIOS support for BERT, the
support for BERT is pending until now. Recently on ARM 64 platform
it is has been supported. So here we come.

Under normal circumstances, when a hardware error occurs, kernel will
be notified via NMI, MCE or some other method, then kernel will
process the error condition, report it, and recover it if possible.
But sometime, the situation is so bad, so that firmware may choose to
reset directly without notifying Linux kernel.

Linux kernel can use the Boot Error Record Table (BERT) to get the
un-notified hardware errors that occurred in a previous boot. In this
patch, the error information is reported via printk.

For more information about BERT, please refer to ACPI Specification
version 6.0, section 18.3.1:
  http://www.uefi.org/sites/default/files/resources/ACPI_6.0.pdf

The following log is a BERT record after system reboot because of hitting
a fatal memory error:
BERT: Error records from previous boot:
[Hardware Error]: It has been corrected by h/w and requires no further action
[Hardware Error]: event severity: corrected
[Hardware Error]:  Error 0, type: recoverable
[Hardware Error]:   section_type: memory error
[Hardware Error]:   error_status: 0x0000000000000400
[Hardware Error]:   physical_address: 0xffffffffffffffff
[Hardware Error]:   card: 1 module: 2 bank: 3 row: 1 column: 2 bit_position: 5
[Hardware Error]:   error_type: 2, single-bit ECC

[Tomasz Nowicki: Clear error status at the end of error handling]
[Tony: Applied some cleanups suggested by Fu Wei]
[Fu Wei: delete EXPORT_SYMBOL_GPL(bert_disable), improve the code]

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Chen, Gong <gong.chen@linux.intel.com>
Tested-by: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Signed-off-by: Fu Wei <fu.wei@linaro.org>
Tested-by: Tyler Baicar <tbaicar@codeaurora.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-06-29 23:35:05 +02:00
Borislav Petkov
dba648300e ACPI / einj: Make error paths more talkative
It is absolutely unfriendly when one sees this:

  # modprobe einj
  modprobe: ERROR: could not insert 'einj': No such device

without anything in dmesg to tell one why the load failed.

Beef up the error handling of the init function to be more user-friendly
when the load fails.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-06-23 23:41:38 +02:00
Borislav Petkov
b2f740baa4 ACPI / einj: Convert EINJ_PFX to proper pr_fmt
... and remove it from the pr_* calls.

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-06-23 23:41:38 +02:00
Geliang Tang
8cfc8ddc99 pstore: add lzo/lz4 compression support
Like zlib compression in pstore, this patch added lzo and lz4
compression support so that users can have more options and better
compression ratio.

The original code treats the compressed data together with the
uncompressed ECC correction notice by using zlib decompress. The
ECC correction notice is missing in the decompression process. The
treatment also makes lzo and lz4 not working. So I treat them
separately by using pstore_decompress() to treat the compressed
data, and memcpy() to treat the uncompressed ECC correction notice.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
2016-06-02 10:59:31 -07:00
Linus Torvalds
277edbabf6 Power management and ACPI material for v4.6-rc1, part 1
- Redesign of cpufreq governors and the intel_pstate driver to
    make them use callbacks invoked by the scheduler to trigger CPU
    frequency evaluation instead of using per-CPU deferrable timers
    for that purpose (Rafael Wysocki).
 
  - Reorganization and cleanup of cpufreq governor code to make it
    more straightforward and fix some concurrency problems in it
    (Rafael Wysocki, Viresh Kumar).
 
  - Cleanup and improvements of locking in the cpufreq core (Viresh
    Kumar).
 
  - Assorted cleanups in the cpufreq core (Rafael Wysocki, Viresh
    Kumar, Eric Biggers).
 
  - intel_pstate driver updates including fixes, optimizations and a
    modification to make it enable enable hardware-coordinated P-state
    selection (HWP) by default if supported by the processor (Philippe
    Longepe, Srinivas Pandruvada, Rafael Wysocki, Viresh Kumar, Felipe
    Franciosi).
 
  - Operating Performance Points (OPP) framework updates to improve
    its handling of voltage regulators and device clocks and updates
    of the cpufreq-dt driver on top of that (Viresh Kumar, Jon Hunter).
 
  - Updates of the powernv cpufreq driver to fix initialization
    and cleanup problems in it and correct its worker thread handling
    with respect to CPU offline, new powernv_throttle tracepoint
    (Shilpasri Bhat).
 
  - ACPI cpufreq driver optimization and cleanup (Rafael Wysocki).
 
  - ACPICA updates including one fix for a regression introduced
    by previos changes in the ACPICA code (Bob Moore, Lv Zheng,
    David Box, Colin Ian King).
 
  - Support for installing ACPI tables from initrd (Lv Zheng).
 
  - Optimizations of the ACPI CPPC code (Prashanth Prakash, Ashwin
    Chaugule).
 
  - Support for _HID(ACPI0010) devices (ACPI processor containers)
    and ACPI processor driver cleanups (Sudeep Holla).
 
  - Support for ACPI-based enumeration of the AMBA bus (Graeme Gregory,
    Aleksey Makarov).
 
  - Modification of the ACPI PCI IRQ management code to make it treat
    255 in the Interrupt Line register as "not connected" on x86 (as
    per the specification) and avoid attempts to use that value as
    a valid interrupt vector (Chen Fan).
 
  - ACPI APEI fixes related to resource leaks (Josh Hunt).
 
  - Removal of modularity from a few ACPI drivers (BGRT, GHES,
    intel_pmic_crc) that cannot be built as modules in practice (Paul
    Gortmaker).
 
  - PNP framework update to make it treat ACPI_RESOURCE_TYPE_SERIAL_BUS
    as a valid resource type (Harb Abdulhamid).
 
  - New device ID (future AMD I2C controller) in the ACPI driver for
    AMD SoCs (APD) and in the designware I2C driver (Xiangliang Yu).
 
  - Assorted ACPI cleanups (Colin Ian King, Kaiyen Chang, Oleg Drokin).
 
  - cpuidle menu governor optimization to avoid a square root
    computation in it (Rasmus Villemoes).
 
  - Fix for potential use-after-free in the generic device properties
    framework (Heikki Krogerus).
 
  - Updates of the generic power domains (genpd) framework including
    support for multiple power states of a domain, fixes and debugfs
    output improvements (Axel Haslam, Jon Hunter, Laurent Pinchart,
    Geert Uytterhoeven).
 
  - Intel RAPL power capping driver updates to reduce IPI overhead in
    it (Jacob Pan).
 
  - System suspend/hibernation code cleanups (Eric Biggers, Saurabh
    Sengar).
 
  - Year 2038 fix for the process freezer (Abhilash Jindal).
 
  - turbostat utility updates including new features (decoding of more
    registers and CPUID fields, sub-second intervals support, GFX MHz
    and RC6 printout, --out command line option), fixes (syscall jitter
    detection and workaround, reductioin of the number of syscalls made,
    fixes related to Xeon x200 processors, compiler warning fixes) and
    cleanups (Len Brown, Hubert Chrzaniuk, Chen Yu).
 
 /
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Merge tag 'pm+acpi-4.6-rc1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management and ACPI updates from Rafael Wysocki:
 "This time the majority of changes go into cpufreq and they are
  significant.

  First off, the way CPU frequency updates are triggered is different
  now.  Instead of having to set up and manage a deferrable timer for
  each CPU in the system to evaluate and possibly change its frequency
  periodically, cpufreq governors set up callbacks to be invoked by the
  scheduler on a regular basis (basically on utilization updates).  The
  "old" governors, "ondemand" and "conservative", still do all of their
  work in process context (although that is triggered by the scheduler
  now), but intel_pstate does it all in the callback invoked by the
  scheduler with no need for any additional asynchronous processing.

  Of course, this eliminates the overhead related to the management of
  all those timers, but also it allows the cpufreq governor code to be
  simplified quite a bit.  On top of that, the common code and data
  structures used by the "ondemand" and "conservative" governors are
  cleaned up and made more straightforward and some long-standing and
  quite annoying problems are addressed.  In particular, the handling of
  governor sysfs attributes is modified and the related locking becomes
  more fine grained which allows some concurrency problems to be avoided
  (particularly deadlocks with the core cpufreq code).

  In principle, the new mechanism for triggering frequency updates
  allows utilization information to be passed from the scheduler to
  cpufreq.  Although the current code doesn't make use of it, in the
  works is a new cpufreq governor that will make decisions based on the
  scheduler's utilization data.  That should allow the scheduler and
  cpufreq to work more closely together in the long run.

  In addition to the core and governor changes, cpufreq drivers are
  updated too.  Fixes and optimizations go into intel_pstate, the
  cpufreq-dt driver is updated on top of some modification in the
  Operating Performance Points (OPP) framework and there are fixes and
  other updates in the powernv cpufreq driver.

  Apart from the cpufreq updates there is some new ACPICA material,
  including a fix for a problem introduced by previous ACPICA updates,
  and some less significant changes in the ACPI code, like CPPC code
  optimizations, ACPI processor driver cleanups and support for loading
  ACPI tables from initrd.

  Also updated are the generic power domains framework, the Intel RAPL
  power capping driver and the turbostat utility and we have a bunch of
  traditional assorted fixes and cleanups.

  Specifics:

   - Redesign of cpufreq governors and the intel_pstate driver to make
     them use callbacks invoked by the scheduler to trigger CPU
     frequency evaluation instead of using per-CPU deferrable timers for
     that purpose (Rafael Wysocki).

   - Reorganization and cleanup of cpufreq governor code to make it more
     straightforward and fix some concurrency problems in it (Rafael
     Wysocki, Viresh Kumar).

   - Cleanup and improvements of locking in the cpufreq core (Viresh
     Kumar).

   - Assorted cleanups in the cpufreq core (Rafael Wysocki, Viresh
     Kumar, Eric Biggers).

   - intel_pstate driver updates including fixes, optimizations and a
     modification to make it enable enable hardware-coordinated P-state
     selection (HWP) by default if supported by the processor (Philippe
     Longepe, Srinivas Pandruvada, Rafael Wysocki, Viresh Kumar, Felipe
     Franciosi).

   - Operating Performance Points (OPP) framework updates to improve its
     handling of voltage regulators and device clocks and updates of the
     cpufreq-dt driver on top of that (Viresh Kumar, Jon Hunter).

   - Updates of the powernv cpufreq driver to fix initialization and
     cleanup problems in it and correct its worker thread handling with
     respect to CPU offline, new powernv_throttle tracepoint (Shilpasri
     Bhat).

   - ACPI cpufreq driver optimization and cleanup (Rafael Wysocki).

   - ACPICA updates including one fix for a regression introduced by
     previos changes in the ACPICA code (Bob Moore, Lv Zheng, David Box,
     Colin Ian King).

   - Support for installing ACPI tables from initrd (Lv Zheng).

   - Optimizations of the ACPI CPPC code (Prashanth Prakash, Ashwin
     Chaugule).

   - Support for _HID(ACPI0010) devices (ACPI processor containers) and
     ACPI processor driver cleanups (Sudeep Holla).

   - Support for ACPI-based enumeration of the AMBA bus (Graeme Gregory,
     Aleksey Makarov).

   - Modification of the ACPI PCI IRQ management code to make it treat
     255 in the Interrupt Line register as "not connected" on x86 (as
     per the specification) and avoid attempts to use that value as a
     valid interrupt vector (Chen Fan).

   - ACPI APEI fixes related to resource leaks (Josh Hunt).

   - Removal of modularity from a few ACPI drivers (BGRT, GHES,
     intel_pmic_crc) that cannot be built as modules in practice (Paul
     Gortmaker).

   - PNP framework update to make it treat ACPI_RESOURCE_TYPE_SERIAL_BUS
     as a valid resource type (Harb Abdulhamid).

   - New device ID (future AMD I2C controller) in the ACPI driver for
     AMD SoCs (APD) and in the designware I2C driver (Xiangliang Yu).

   - Assorted ACPI cleanups (Colin Ian King, Kaiyen Chang, Oleg Drokin).

   - cpuidle menu governor optimization to avoid a square root
     computation in it (Rasmus Villemoes).

   - Fix for potential use-after-free in the generic device properties
     framework (Heikki Krogerus).

   - Updates of the generic power domains (genpd) framework including
     support for multiple power states of a domain, fixes and debugfs
     output improvements (Axel Haslam, Jon Hunter, Laurent Pinchart,
     Geert Uytterhoeven).

   - Intel RAPL power capping driver updates to reduce IPI overhead in
     it (Jacob Pan).

   - System suspend/hibernation code cleanups (Eric Biggers, Saurabh
     Sengar).

   - Year 2038 fix for the process freezer (Abhilash Jindal).

   - turbostat utility updates including new features (decoding of more
     registers and CPUID fields, sub-second intervals support, GFX MHz
     and RC6 printout, --out command line option), fixes (syscall jitter
     detection and workaround, reductioin of the number of syscalls
     made, fixes related to Xeon x200 processors, compiler warning
     fixes) and cleanups (Len Brown, Hubert Chrzaniuk, Chen Yu)"

* tag 'pm+acpi-4.6-rc1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (182 commits)
  tools/power turbostat: bugfix: TDP MSRs print bits fixing
  tools/power turbostat: correct output for MSR_NHM_SNB_PKG_CST_CFG_CTL dump
  tools/power turbostat: call __cpuid() instead of __get_cpuid()
  tools/power turbostat: indicate SMX and SGX support
  tools/power turbostat: detect and work around syscall jitter
  tools/power turbostat: show GFX%rc6
  tools/power turbostat: show GFXMHz
  tools/power turbostat: show IRQs per CPU
  tools/power turbostat: make fewer systems calls
  tools/power turbostat: fix compiler warnings
  tools/power turbostat: add --out option for saving output in a file
  tools/power turbostat: re-name "%Busy" field to "Busy%"
  tools/power turbostat: Intel Xeon x200: fix turbo-ratio decoding
  tools/power turbostat: Intel Xeon x200: fix erroneous bclk value
  tools/power turbostat: allow sub-sec intervals
  ACPI / APEI: ERST: Fixed leaked resources in erst_init
  ACPI / APEI: Fix leaked resources
  intel_pstate: Do not skip samples partially
  intel_pstate: Remove freq calculation from intel_pstate_calc_busy()
  intel_pstate: Move intel_pstate_calc_busy() into get_target_pstate_use_performance()
  ...
2016-03-16 14:10:53 -07:00
Rafael J. Wysocki
bdeabccdf9 Merge branches 'acpi-ec', 'acpi-fan', 'acpi-video' and 'acpi-misc'
* acpi-ec:
  ACPI / EC: Deny write access unless requested by module param

* acpi-fan:
  ACPI / fan: Make struct dev_pm_ops const

* acpi-video:
  ACPI / video: remove unused device_decode array

* acpi-misc:
  ACPI / util: remove redundant check if element is NULL
  ACPI: Add acpi_force_32bit_fadt_addr option to force 32 bit FADT addresses
  drivers/acpi: make pmic/intel_pmic_crc.c explicitly non-modular
  drivers/acpi: make apei/ghes.c more explicitly non-modular
  drivers/acpi: make bgrt driver explicitly non-modular
2016-03-14 14:21:23 +01:00
Josh Hunt
3a03d126ec ACPI / APEI: ERST: Fixed leaked resources in erst_init
erst_init currently leaks resources allocated from its call to
apei_resources_init(). The data allocated there gets copied
into apei_resources_all and can be freed when we're done with it.

Signed-off-by: Josh Hunt <johunt@akamai.com>
Reviewed-by: Chen, Gong <gong.chen@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-03-11 00:14:16 +01:00
Josh Hunt
e56c92565d ACPI / APEI: Fix leaked resources
We leak the NVS and arch resources (if used), in apei_resources_request.
They are allocated to make sure we exclude them from the APEI resources,
but they are never freed at the end of the function. Free them now.

Signed-off-by: Josh Hunt <johunt@akamai.com>
Reviewed-by: Chen, Gong <gong.chen@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-03-11 00:13:25 +01:00
Paul Gortmaker
020bf066a6 drivers/acpi: make apei/ghes.c more explicitly non-modular
The Kconfig currently controlling compilation of this code is:

config ACPI_APEI_GHES
      bool "APEI Generic Hardware Error Source"

...meaning that it currently is not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.

We replace module.h with moduleparam.h as we are keeping the
pre-existing module_param that the file has, as currently that is
the easiest way to maintain compatibility with the existing boot
arg use cases.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-03-09 23:46:07 +01:00
Toshi Kani
4650bac1fc ACPI/EINJ: Allow memory error injection to NVDIMM
In the case of memory error injection, einj_error_inject()
checks if a target address is System RAM. Change this check to
allow injecting a memory error into NVDIMM memory by calling
region_intersects() with IORES_DESC_PERSISTENT_MEMORY. This
enables memory error testing on both System RAM and NVDIMM.

In addition, page_is_ram() is replaced with region_intersects()
with IORESOURCE_SYSTEM_RAM, so that it can verify a target
address range with the requested size.

Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: linux-acpi@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-mm <linux-mm@kvack.org>
Cc: linux-nvdimm@lists.01.org
Link: http://lkml.kernel.org/r/1453841853-11383-18-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-30 09:50:00 +01:00
Tetsuo Handa
1d5cfdb076 tree wide: use kvfree() than conditional kfree()/vfree()
There are many locations that do

  if (memory_was_allocated_by_vmalloc)
    vfree(ptr);
  else
    kfree(ptr);

but kvfree() can handle both kmalloc()ed memory and vmalloc()ed memory
using is_vmalloc_addr().  Unless callers have special reasons, we can
replace this branch with kvfree().  Please check and reply if you found
problems.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Jan Kara <jack@suse.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Acked-by: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Acked-by: David Rientjes <rientjes@google.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Oleg Drokin <oleg.drokin@intel.com>
Cc: Boris Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-22 17:02:18 -08:00
Ingo Molnar
c7d77a7980 Merge branch 'x86/urgent' into core/efi, to pick up a pending EFI fix
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-10-14 16:05:18 +02:00
Jonathan (Zhixiong) Zhang
8ece249a81 acpi/apei: Use appropriate pgprot_t to map GHES memory
If the ACPI APEI firmware handles hardware error first (called
"firmware first handling"), the firmware updates the GHES memory
region with hardware error record (called "generic hardware
error record"). Essentially the firmware writes hardware error
records in the GHES memory region, triggers an NMI/interrupt,
then the GHES driver goes off and grabs the error record from
the GHES region.

The kernel currently maps the GHES memory region as cacheable
(PAGE_KERNEL) for all architectures. However, on some arm64
platforms, there is a mismatch between how the kernel maps the
GHES region (PAGE_KERNEL) and how the firmware maps it
(EFI_MEMORY_UC, ie. uncacheable), leading to the possibility of
the kernel GHES driver reading stale data from the cache when it
receives the interrupt.

With stale data being read, the kernel is unaware there is new
hardware error to be handled when there actually is; this may
lead to further damage in various scenarios, such as error
propagation caused data corruption. If uncorrected error (such
as double bit ECC error) happened in memory operation and if the
kernel is unaware of such an event happening, errorneous data may
be propagated to the disk.

Instead GHES memory region should be mapped with page protection
type according to what is returned from arch_apei_get_mem_attribute().

Signed-off-by: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
[ Small stylistic tweaks. ]
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1441372302-23242-3-git-send-email-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-09-14 11:40:04 +02:00
Jarkko Nikula
4c62dbbce9 ACPI: Remove FSF mailing addresses
There is no need to carry potentially outdated Free Software Foundation
mailing address in file headers since the COPYING file includes it.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-07-08 02:27:32 +02:00
Linus Torvalds
43c9fad942 Power management and ACPI material for v4.2-rc1
- ACPICA update to upstream revision 20150515 including basic
    support for ACPI 6 features: new ACPI tables introduced by
    ACPI 6 (STAO, XENV, WPBT, NFIT, IORT), changes related to the
    other tables (DTRM, FADT, LPIT, MADT), new predefined names
    (_BTH, _CR3, _DSD, _LPI, _MTL, _PRR, _RDI, _RST, _TFP, _TSN),
    fixes and cleanups (Bob Moore, Lv Zheng).
 
  - ACPI device power management core code update to follow ACPI 6
    which reflects the ACPI device power management implementation
    in Windows (Rafael J Wysocki).
 
  - Rework of the backlight interface selection logic to reduce the
    number of kernel command line options and improve the handling
    of DMI quirks that may be involved in that and to make the
    code generally more straightforward (Hans de Goede).
 
  - Fixes for the ACPI Embedded Controller (EC) driver related to
    the handling of EC transactions (Lv Zheng).
 
  - Fix for a regression related to the ACPI resources management
    and resulting from a recent change of ACPI initialization code
    ordering (Rafael J Wysocki).
 
  - Fix for a system initialization regression related to ACPI
    introduced during the 3.14 cycle and caused by running the
    code that switches the platform over to the ACPI mode too
    early in the initialization sequence (Rafael J Wysocki).
 
  - Support for the ACPI _CCA device configuration object related
    to DMA cache coherence (Suravee Suthikulpanit).
 
  - ACPI/APEI fixes and cleanups (Jiri Kosina, Borislav Petkov).
 
  - ACPI battery driver cleanups (Luis Henriques, Mathias Krause).
 
  - ACPI processor driver cleanups (Hanjun Guo).
 
  - Cleanups and documentation update related to the ACPI device
    properties interface based on _DSD (Rafael J Wysocki).
 
  - ACPI device power management fixes (Rafael J Wysocki).
 
  - Assorted cleanups related to ACPI (Dominik Brodowski. Fabian
    Frederick, Lorenzo Pieralisi, Mathias Krause, Rafael J Wysocki).
 
  - Fix for a long-standing issue causing General Protection Faults
    to be generated occasionally on return to user space after resume
    from ACPI-based suspend-to-RAM on 32-bit x86 (Ingo Molnar).
 
  - Fix to make the suspend core code return -EBUSY consistently in
    all cases when system suspend is aborted due to wakeup detection
    (Ruchi Kandoi).
 
  - Support for automated device wakeup IRQ handling allowing drivers
    to make their PM support more starightforward (Tony Lindgren).
 
  - New tracepoints for suspend-to-idle tracing and rework of the
    prepare/complete callbacks tracing in the PM core (Todd E Brandt,
    Rafael J Wysocki).
 
  - Wakeup sources framework enhancements (Jin Qian).
 
  - New macro for noirq system PM callbacks (Grygorii Strashko).
 
  - Assorted cleanups related to system suspend (Rafael J Wysocki).
 
  - cpuidle core cleanups to make the code more efficient (Rafael J
    Wysocki).
 
  - powernv/pseries cpuidle driver update (Shilpasri G Bhat).
 
  - cpufreq core fixes related to CPU online/offline that should
    reduce the overhead of these operations quite a bit, unless the
    CPU in question is physically going away (Viresh Kumar, Saravana
    Kannan).
 
  - Serialization of cpufreq governor callbacks to avoid race
    conditions in some cases (Viresh Kumar).
 
  - intel_pstate driver fixes and cleanups (Doug Smythies, Prarit
    Bhargava, Joe Konno).
 
  - cpufreq driver (arm_big_little, cpufreq-dt, qoriq) updates (Sudeep
    Holla, Felipe Balbi, Tang Yuantian).
 
  - Assorted cleanups in cpufreq drivers and core (Shailendra Verma,
    Fabian Frederick, Wang Long).
 
  - New Device Tree bindings for representing Operating Performance
    Points (Viresh Kumar).
 
  - Updates for the common clock operations support code in the PM
    core (Rajendra Nayak, Geert Uytterhoeven).
 
  - PM domains core code update (Geert Uytterhoeven).
 
  - Intel Knights Landing support for the RAPL (Running Average Power
    Limit) power capping driver (Dasaratharaman Chandramouli).
 
  - Fixes related to the floor frequency setting on Atom SoCs in the
    RAPL power capping driver (Ajay Thomas).
 
  - Runtime PM framework documentation update (Ben Dooks).
 
  - cpupower tool fix (Herton R Krzesinski).
 
 /
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Merge tag 'pm+acpi-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management and ACPI updates from Rafael Wysocki:
 "The rework of backlight interface selection API from Hans de Goede
  stands out from the number of commits and the number of affected
  places perspective.  The cpufreq core fixes from Viresh Kumar are
  quite significant too as far as the number of commits goes and because
  they should reduce CPU online/offline overhead quite a bit in the
  majority of cases.

  From the new featues point of view, the ACPICA update (to upstream
  revision 20150515) adding support for new ACPI 6 material to ACPICA is
  the one that matters the most as some new significant features will be
  based on it going forward.  Also included is an update of the ACPI
  device power management core to follow ACPI 6 (which in turn reflects
  the Windows' device PM implementation), a PM core extension to support
  wakeup interrupts in a more generic way and support for the ACPI _CCA
  device configuration object.

  The rest is mostly fixes and cleanups all over and some documentation
  updates, including new DT bindings for Operating Performance Points.

  There is one fix for a regression introduced in the 4.1 cycle, but it
  adds quite a number of lines of code, it wasn't really ready before
  Thursday and you were on vacation, so I refrained from pushing it on
  the last minute for 4.1.

  Specifics:

   - ACPICA update to upstream revision 20150515 including basic support
     for ACPI 6 features: new ACPI tables introduced by ACPI 6 (STAO,
     XENV, WPBT, NFIT, IORT), changes related to the other tables (DTRM,
     FADT, LPIT, MADT), new predefined names (_BTH, _CR3, _DSD, _LPI,
     _MTL, _PRR, _RDI, _RST, _TFP, _TSN), fixes and cleanups (Bob Moore,
     Lv Zheng).

   - ACPI device power management core code update to follow ACPI 6
     which reflects the ACPI device power management implementation in
     Windows (Rafael J Wysocki).

   - rework of the backlight interface selection logic to reduce the
     number of kernel command line options and improve the handling of
     DMI quirks that may be involved in that and to make the code
     generally more straightforward (Hans de Goede).

   - fixes for the ACPI Embedded Controller (EC) driver related to the
     handling of EC transactions (Lv Zheng).

   - fix for a regression related to the ACPI resources management and
     resulting from a recent change of ACPI initialization code ordering
     (Rafael J Wysocki).

   - fix for a system initialization regression related to ACPI
     introduced during the 3.14 cycle and caused by running the code
     that switches the platform over to the ACPI mode too early in the
     initialization sequence (Rafael J Wysocki).

   - support for the ACPI _CCA device configuration object related to
     DMA cache coherence (Suravee Suthikulpanit).

   - ACPI/APEI fixes and cleanups (Jiri Kosina, Borislav Petkov).

   - ACPI battery driver cleanups (Luis Henriques, Mathias Krause).

   - ACPI processor driver cleanups (Hanjun Guo).

   - cleanups and documentation update related to the ACPI device
     properties interface based on _DSD (Rafael J Wysocki).

   - ACPI device power management fixes (Rafael J Wysocki).

   - assorted cleanups related to ACPI (Dominik Brodowski, Fabian
     Frederick, Lorenzo Pieralisi, Mathias Krause, Rafael J Wysocki).

   - fix for a long-standing issue causing General Protection Faults to
     be generated occasionally on return to user space after resume from
     ACPI-based suspend-to-RAM on 32-bit x86 (Ingo Molnar).

   - fix to make the suspend core code return -EBUSY consistently in all
     cases when system suspend is aborted due to wakeup detection (Ruchi
     Kandoi).

   - support for automated device wakeup IRQ handling allowing drivers
     to make their PM support more starightforward (Tony Lindgren).

   - new tracepoints for suspend-to-idle tracing and rework of the
     prepare/complete callbacks tracing in the PM core (Todd E Brandt,
     Rafael J Wysocki).

   - wakeup sources framework enhancements (Jin Qian).

   - new macro for noirq system PM callbacks (Grygorii Strashko).

   - assorted cleanups related to system suspend (Rafael J Wysocki).

   - cpuidle core cleanups to make the code more efficient (Rafael J
     Wysocki).

   - powernv/pseries cpuidle driver update (Shilpasri G Bhat).

   - cpufreq core fixes related to CPU online/offline that should reduce
     the overhead of these operations quite a bit, unless the CPU in
     question is physically going away (Viresh Kumar, Saravana Kannan).

   - serialization of cpufreq governor callbacks to avoid race
     conditions in some cases (Viresh Kumar).

   - intel_pstate driver fixes and cleanups (Doug Smythies, Prarit
     Bhargava, Joe Konno).

   - cpufreq driver (arm_big_little, cpufreq-dt, qoriq) updates (Sudeep
     Holla, Felipe Balbi, Tang Yuantian).

   - assorted cleanups in cpufreq drivers and core (Shailendra Verma,
     Fabian Frederick, Wang Long).

   - new Device Tree bindings for representing Operating Performance
     Points (Viresh Kumar).

   - updates for the common clock operations support code in the PM core
     (Rajendra Nayak, Geert Uytterhoeven).

   - PM domains core code update (Geert Uytterhoeven).

   - Intel Knights Landing support for the RAPL (Running Average Power
     Limit) power capping driver (Dasaratharaman Chandramouli).

   - fixes related to the floor frequency setting on Atom SoCs in the
     RAPL power capping driver (Ajay Thomas).

   - runtime PM framework documentation update (Ben Dooks).

   - cpupower tool fix (Herton R Krzesinski)"

* tag 'pm+acpi-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (194 commits)
  cpuidle: powernv/pseries: Auto-promotion of snooze to deeper idle state
  x86: Load __USER_DS into DS/ES after resume
  PM / OPP: Add binding for 'opp-suspend'
  PM / OPP: Allow multiple OPP tables to be passed via DT
  PM / OPP: Add new bindings to address shortcomings of existing bindings
  ACPI: Constify ACPI device IDs in documentation
  ACPI / enumeration: Document the rules regarding the PRP0001 device ID
  ACPI / video: Make acpi_video_unregister_backlight() private
  acpi-video-detect: Remove old API
  toshiba-acpi: Port to new backlight interface selection API
  thinkpad-acpi: Port to new backlight interface selection API
  sony-laptop: Port to new backlight interface selection API
  samsung-laptop: Port to new backlight interface selection API
  msi-wmi: Port to new backlight interface selection API
  msi-laptop: Port to new backlight interface selection API
  intel-oaktrail: Port to new backlight interface selection API
  ideapad-laptop: Port to new backlight interface selection API
  fujitsu-laptop: Port to new backlight interface selection API
  eeepc-laptop: Port to new backlight interface selection API
  dell-wmi: Port to new backlight interface selection API
  ...
2015-06-23 14:18:07 -07:00
Stephen Rothwell
d6472302f2 x86/mm: Decouple <linux/vmalloc.h> from <asm/io.h>
Nothing in <asm/io.h> uses anything from <linux/vmalloc.h>, so
remove it from there and fix up the resulting build problems
triggered on x86 {64|32}-bit {def|allmod|allno}configs.

The breakages were triggering in places where x86 builds relied
on vmalloc() facilities but did not include <linux/vmalloc.h>
explicitly and relied on the implicit inclusion via <asm/io.h>.

Also add:

  - <linux/init.h> to <linux/io.h>
  - <asm/pgtable_types> to <asm/io.h>

... which were two other implicit header file dependencies.

Suggested-by: David Miller <davem@davemloft.net>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
[ Tidied up the changelog. ]
Acked-by: David Miller <davem@davemloft.net>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Colin Cross <ccross@android.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: James E.J. Bottomley <JBottomley@odin.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Kristen Carlson Accardi <kristen@linux.intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Suma Ramars <sramars@cisco.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-06-03 12:02:00 +02:00
Jiri Kosina
6fe9e7c26a GHES: Make NMI handler have a single reader
Since GHES sources are global, we theoretically need only a single CPU
reading them per NMI instead of a thundering herd of CPUs waiting on a
spinlock in NMI context for no reason at all.

Do that.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Borislav Petkov <bp@suse.de>
2015-04-27 21:35:33 +02:00