Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-18 17:12:55 +00:00
Code Issues Packages Projects Releases Wiki Activity
650,474 Commits 7 Branches 865 Tags 6.5 GiB
292d386743
Commit Graph

1233 Commits

Author SHA1 Message Date
Linus Torvalds
292d386743 Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 boot updates from Ingo Molnar:
 "Misc updates:

   - fix e820 error handling

   - convert page table setup code from assembly to C

   - fix kexec environment bug

   - ... plus small cleanups"

* 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/kconfig: Remove misleading note regarding hibernation and KASLR
  x86/boot: Fix KASLR and memmap= collision
  x86/e820/32: Fix e820_search_gap() error handling on x86-32
  x86/boot/32: Convert the 32-bit pgtable setup code from assembly to C
  x86/e820: Make e820_search_gap() static and remove unused variables
 2017-02-20 14:04:37 -08:00
Niklas Cassel
5773ebfee7 x86/kconfig: Remove misleading note regarding hibernation and KASLR 
There used to be a restriction with KASLR and hibernation, but this is no
longer true, and since commit:

  65fe935dd2 ("x86/KASLR, x86/power: Remove x86 hibernation restrictions")

the parameter "kaslr" does no longer exist.

Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Niklas Cassel <niklass@axis.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1486399429-23078-1-git-send-email-niklass@axis.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2017-02-07 10:39:58 +01:00
Borislav Petkov
d4b2ac63b0 x86/ras/inject: Make it depend on X86_LOCAL_APIC=y 
... and get rid of the annoying:

  arch/x86/kernel/cpu/mcheck/mce-inject.c:97:13: warning: ‘mce_irq_ipi’ defined but not used [-Wunused-function]

when doing randconfig builds.

Signed-off-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>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Yazen Ghannam <Yazen.Ghannam@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20170123183514.13356-2-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2017-01-24 09:14:52 +01:00
Linus Torvalds
eb254f323b Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 cache allocation interface from Thomas Gleixner:
 "This provides support for Intel's Cache Allocation Technology, a cache
  partitioning mechanism.

  The interface is odd, but the hardware interface of that CAT stuff is
  odd as well.

  We tried hard to come up with an abstraction, but that only allows
  rather simple partitioning, but no way of sharing and dealing with the
  per package nature of this mechanism.

  In the end we decided to expose the allocation bitmaps directly so all
  combinations of the hardware can be utilized.

  There are two ways of associating a cache partition:

   - Task

     A task can be added to a resource group. It uses the cache
     partition associated to the group.

   - CPU

     All tasks which are not member of a resource group use the group to
     which the CPU they are running on is associated with.

     That allows for simple CPU based partitioning schemes.

  The main expected user sare:

   - Virtualization so a VM can only trash only the associated part of
     the cash w/o disturbing others

   - Real-Time systems to seperate RT and general workloads.

   - Latency sensitive enterprise workloads

   - In theory this also can be used to protect against cache side
     channel attacks"

[ Intel RDT is "Resource Director Technology". The interface really is
  rather odd and very specific, which delayed this pull request while I
  was thinking about it. The pull request itself came in early during
  the merge window, I just delayed it until things had calmed down and I
  had more time.

  But people tell me they'll use this, and the good news is that it is
  _so_ specific that it's rather independent of anything else, and no
  user is going to depend on the interface since it's pretty rare. So if
  push comes to shove, we can just remove the interface and nothing will
  break ]

* 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits)
  x86/intel_rdt: Implement show_options() for resctrlfs
  x86/intel_rdt: Call intel_rdt_sched_in() with preemption disabled
  x86/intel_rdt: Update task closid immediately on CPU in rmdir and unmount
  x86/intel_rdt: Fix setting of closid when adding CPUs to a group
  x86/intel_rdt: Update percpu closid immeditately on CPUs affected by changee
  x86/intel_rdt: Reset per cpu closids on unmount
  x86/intel_rdt: Select KERNFS when enabling INTEL_RDT_A
  x86/intel_rdt: Prevent deadlock against hotplug lock
  x86/intel_rdt: Protect info directory from removal
  x86/intel_rdt: Add info files to Documentation
  x86/intel_rdt: Export the minimum number of set mask bits in sysfs
  x86/intel_rdt: Propagate error in rdt_mount() properly
  x86/intel_rdt: Add a missing #include
  MAINTAINERS: Add maintainer for Intel RDT resource allocation
  x86/intel_rdt: Add scheduler hook
  x86/intel_rdt: Add schemata file
  x86/intel_rdt: Add tasks files
  x86/intel_rdt: Add cpus file
  x86/intel_rdt: Add mkdir to resctrl file system
  x86/intel_rdt: Add "info" files to resctrl file system
  ...
 2016-12-22 09:25:45 -08:00
Linus Torvalds
8421c60446 platform-drivers-x86 for 4.10-2 
Move and add registration for the mlx-platform driver. Introduce button and lid
 drivers for the surface3 (different from the surface3-pro). Add BXT PMIC TMU
 support. Add Y700 to existing ideapad-laptop quirk.
 
 ideapad-laptop:
  - Add Y700 15-ACZ to no_hw_rfkill DMI list
 
 surface3_button:
  - Introduce button support for the Surface 3
 
 surface3-wmi:
  - Add custom surface3 platform device for controlling LID
  - Balance locking on error path
 
 mlx-platform:
  - Add mlxcpld-hotplug driver registration
  - Fix semicolon.cocci warnings
  - Move module from arch/x86
 
 platform/x86:
  - Add Whiskey Cove PMIC TMU support
 -----BEGIN PGP SIGNATURE-----
 
 iQEcBAABAgAGBQJYVxXxAAoJEKbMaAwKp364mDAIAL750zoO/liY1qfFGktkY2zS
 xknJqh4UeIVW6iN9hEq7jQD3jkFl7hNuXgFyogLZgJQge8gfufsOD7ljkhp2wVF2
 3Ir437f4GdcUeuhO6PwuPZnn++Y6oH2rLZc1d+5anZRikW470tnXitrXs5hsqG57
 74KiSFa+v+Uj1kqU4Gjt0QDSfmQc185Wn5xieHPpZrcjDaut+N4t06+MDMcH7fjk
 6nJ+tvo/dreZojA+AklljaNB2BioIGbEOGamnxOJ9Rjs0jV2d0A1c/6XBHDe+Xtu
 SkWqvjdrLOSxAjErBpB97VYnYihjCDXfl+DIABOdumGO6hJz01DvbZ+VVLwGM0E=
 =YH31
 -----END PGP SIGNATURE-----

Merge tag 'platform-drivers-x86-v4.10-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86

Pull more x86 platform driver updates from Darren Hart:
 "Move and add registration for the mlx-platform driver. Introduce
  button and lid drivers for the surface3 (different from the
  surface3-pro). Add BXT PMIC TMU support. Add Y700 to existing
  ideapad-laptop quirk.

  Summary:

  ideapad-laptop:
   - Add Y700 15-ACZ to no_hw_rfkill DMI list

  surface3_button:
   - Introduce button support for the Surface 3

  surface3-wmi:
   - Add custom surface3 platform device for controlling LID
   - Balance locking on error path

  mlx-platform:
   - Add mlxcpld-hotplug driver registration
   - Fix semicolon.cocci warnings
   - Move module from arch/x86

  platform/x86:
   - Add Whiskey Cove PMIC TMU support"

* tag 'platform-drivers-x86-v4.10-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86:
  platform/x86: surface3-wmi: Balance locking on error path
  platform/x86: Add Whiskey Cove PMIC TMU support
  platform/x86: ideapad-laptop: Add Y700 15-ACZ to no_hw_rfkill DMI list
  platform/x86: Introduce button support for the Surface 3
  platform/x86: Add custom surface3 platform device for controlling LID
  platform/x86: mlx-platform: Add mlxcpld-hotplug driver registration
  platform/x86: mlx-platform: Fix semicolon.cocci warnings
  platform/x86: mlx-platform: Move module from arch/x86
 2016-12-18 15:45:33 -08:00
Vadim Pasternak
6613d18e90 platform/x86: mlx-platform: Move module from arch/x86 
Since mlx-platform is not an architectural driver, it is moved out
of arch/x86/platform to drivers/platform/x86.
Relevant Makefile and Kconfig are updated.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 2016-12-16 23:30:24 +02:00
Linus Torvalds
e7aa8c2eb1 These are the documentation changes for 4.10. 
It's another busy cycle for the docs tree, as the sphinx conversion
 continues.  Highlights include:
 
  - Further work on PDF output, which remains a bit of a pain but should be
    more solid now.
 
  - Five more DocBook template files converted to Sphinx.  Only 27 to go...
    Lots of plain-text files have also been converted and integrated.
 
  - Images in binary formats have been replaced with more source-friendly
    versions.
 
  - Various bits of organizational work, including the renaming of various
    files discussed at the kernel summit.
 
  - New documentation for the device_link mechanism.
 
 ...and, of course, lots of typo fixes and small updates.
 -----BEGIN PGP SIGNATURE-----
 
 iQIcBAABAgAGBQJYTbl7AAoJEI3ONVYwIuV63NIP/REwzThnGWFJMRSuq8Ieq2r9
 sFSQsaGTGlhyKiDoEooo+SO/Za3uTonjK+e7WZg8mhdiEdamta5aociU/71C1Yy/
 T9ur0FhcGblrvZ1NidSDvCLwuECZOMMei7mgLZ9a+KCpc4ANqqTVZSUm1blKcqhF
 XelhVXxBa0ar35l/pVzyCxkdNXRWXv+MJZE8hp5XAdTdr11DS7UY9zrZdH31axtf
 BZlbYJrvB8WPydU6myTjRpirA17Hu7uU64MsL3bNIEiRQ+nVghEzQC8uxeUCvfVx
 r0H5AgGGQeir+e8GEv2T20SPZ+dumXs+y/HehKNb3jS3gV0mo+pKPeUhwLIxr+Zh
 QY64gf+jYf5ISHwAJRnU0Ima72ehObzSbx9Dko10nhq2OvbR5f83gjz9t9jKYFU7
 RDowICA8lwqyRbHRoVfyoW8CpVhWFpMFu3yNeJMckeTish3m7ANqzaWslbsqIP5G
 zxgFMIrVVSbeae+sUeygtEJAnWI09aZ4tuaUXYtGWwu6ikC/3aV6DryP4bthG2LF
 A19uV4nMrLuuh8g2wiTHHjMfjYRwvSn+f9yaolwJhwyNDXQzRPy+ZJ3W/6olOkXC
 bAxTmVRCW5GA/fmSrfXmW1KbnxlWfP2C62hzZQ09UHxzTHdR97oFLDQdZhKo1uwf
 pmSJR0hVeRUmA4uw6+Su
 =A0EV
 -----END PGP SIGNATURE-----

Merge tag 'docs-4.10' of git://git.lwn.net/linux

Pull documentation update from Jonathan Corbet:
 "These are the documentation changes for 4.10.

  It's another busy cycle for the docs tree, as the sphinx conversion
  continues. Highlights include:

   - Further work on PDF output, which remains a bit of a pain but
     should be more solid now.

   - Five more DocBook template files converted to Sphinx. Only 27 to
     go... Lots of plain-text files have also been converted and
     integrated.

   - Images in binary formats have been replaced with more
     source-friendly versions.

   - Various bits of organizational work, including the renaming of
     various files discussed at the kernel summit.

   - New documentation for the device_link mechanism.

  ... and, of course, lots of typo fixes and small updates"

* tag 'docs-4.10' of git://git.lwn.net/linux: (193 commits)
  dma-buf: Extract dma-buf.rst
  Update Documentation/00-INDEX
  docs: 00-INDEX: document directories/files with no docs
  docs: 00-INDEX: remove non-existing entries
  docs: 00-INDEX: add missing entries for documentation files/dirs
  docs: 00-INDEX: consolidate process/ and admin-guide/ description
  scripts: add a script to check if Documentation/00-INDEX is sane
  Docs: change sh -> awk in REPORTING-BUGS
  Documentation/core-api/device_link: Add initial documentation
  core-api: remove an unexpected unident
  ppc/idle: Add documentation for powersave=off
  Doc: Correct typo, "Introdution" => "Introduction"
  Documentation/atomic_ops.txt: convert to ReST markup
  Documentation/local_ops.txt: convert to ReST markup
  Documentation/assoc_array.txt: convert to ReST markup
  docs-rst: parse-headers.pl: cleanup the documentation
  docs-rst: fix media cleandocs target
  docs-rst: media/Makefile: reorganize the rules
  docs-rst: media: build SVG from graphviz files
  docs-rst: replace bayer.png by a SVG image
  ...
 2016-12-12 21:58:13 -08:00
Linus Torvalds
5fc0363d43 Merge branch 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 build updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Makefile improvements (Paul Bolle)

   - KConfig cleanups to better separate 32-bit only, 64-bit only and
     generic feature enablement sections (Ingo Molnar)"

* 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/build: Remove three unneeded genhdr-y entries
  x86/build: Don't use $(LINUXINCLUDE) twice
  x86/kconfig: Sort the 'config X86' selects alphabetically
  x86/kconfig: Clean up 32-bit compat options
  x86/kconfig: Clean up IA32_EMULATION select
  x86/kconfig, x86/pkeys: Move pkeys selects to X86_INTEL_MEMORY_PROTECTION_KEYS
  x86/kconfig: Move 64-bit only arch Kconfig selects to 'config X86_64'
  x86/kconfig: Move 32-bit only arch Kconfig selects to 'config X86_32'
 2016-12-12 14:16:19 -08:00
Linus Torvalds
df5f0f0a02 Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 RAS updates from Ingo Molnar:
 "The main changes in this development cycle were:

   - more AMD northbridge support work, mostly in preparation for Fam17h
     CPUs (Yazen Ghannam, Borislav Petkov)

   - cleanups/refactorings and fixes (Borislav Petkov, Tony Luck,
     Yinghai Lu)"

* 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce: Include the PPIN in MCE records when available
  x86/mce/AMD: Add system physical address translation for AMD Fam17h
  x86/amd_nb: Add SMN and Indirect Data Fabric access for AMD Fam17h
  x86/amd_nb: Add Fam17h Data Fabric as "Northbridge"
  x86/amd_nb: Make all exports EXPORT_SYMBOL_GPL
  x86/amd_nb: Make amd_northbridges internal to amd_nb.c
  x86/mce/AMD: Reset Threshold Limit after logging error
  x86/mce/AMD: Fix HWID_MCATYPE calculation by grouping arguments
  x86/MCE: Correct TSC timestamping of error records
  x86/RAS: Hide SMCA bank names
  x86/RAS: Rename smca_bank_names to smca_names
  x86/RAS: Simplify SMCA HWID descriptor struct
  x86/RAS: Simplify SMCA bank descriptor struct
  x86/MCE: Dump MCE to dmesg if no consumers
  x86/RAS: Add TSC timestamp to the injected MCE
  x86/MCE: Do not look at panic_on_oops in the severity grading
 2016-12-12 12:58:50 -08:00
Ingo Molnar
0a21fc1214 sched/x86: Make CONFIG_SCHED_MC_PRIO=y easier to enable 
Right now CONFIG_SCHED_MC_PRIO has X86_INTEL_PSTATE as a dependency,
which is not enabled by default and which hides the CONFIG_SCHED_MC_PRIO
hardware-enabling feature.

Select X86_INTEL_PSTATE instead, plus its dependency (CPU_FREQ), if the
user enables CONFIG_SCHED_MC_PRIO=y.

(Also align the CONFIG_SCHED_MC_PRIO Kconfig help text in standard style.)

Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: bp@suse.de
Cc: jolsa@redhat.com
Cc: linux-acpi@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: rjw@rjwysocki.net
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-11-30 08:36:10 +01:00
Tim Chen
de966cf4a4 sched/x86: Change CONFIG_SCHED_ITMT to CONFIG_SCHED_MC_PRIO 
Rename CONFIG_SCHED_ITMT for Intel Turbo Boost Max Technology 3.0
to CONFIG_SCHED_MC_PRIO.  This makes the configuration extensible
in future to other architectures that wish to similarly establish
CPU core priorities support in the scheduler.

The description in Kconfig is updated to reflect this change with
added details for better clarity.  The configuration is explicitly
default-y, to enable the feature on CPUs that have this feature.

It has no effect on non-TBM3 CPUs.

Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bp@suse.de
Cc: jolsa@redhat.com
Cc: linux-acpi@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: rjw@rjwysocki.net
Link: http://lkml.kernel.org/r/2b2ee29d93e3f162922d72d0165a1405864fbb23.1480444902.git.tim.c.chen@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-11-30 08:27:08 +01:00
Tim Chen
5e76b2ab36 x86: Enable Intel Turbo Boost Max Technology 3.0 
On platforms supporting Intel Turbo Boost Max Technology 3.0, the maximum
turbo frequencies of some cores in a CPU package may be higher than for
the other cores in the same package.  In that case, better performance
(and possibly lower energy consumption as well) can be achieved by
making the scheduler prefer to run tasks on the CPUs with higher max
turbo frequencies.

To that end, set up a core priority metric to abstract the core
preferences based on the maximum turbo frequency.  In that metric,
the cores with higher maximum turbo frequencies are higher-priority
than the other cores in the same package and that causes the scheduler
to favor them when making load-balancing decisions using the asymmertic
packing approach.  At the same time, the priority of SMT threads with a
higher CPU number is reduced so as to avoid scheduling tasks on all of
the threads that belong to a favored core before all of the other cores
have been given a task to run.

The priority metric will be initialized by the P-state driver with the
help of the sched_set_itmt_core_prio() function.  The P-state driver
will also determine whether or not ITMT is supported by the platform
and will call sched_set_itmt_support() to indicate that.

Co-developed-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Co-developed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Cc: linux-pm@vger.kernel.org
Cc: peterz@infradead.org
Cc: jolsa@redhat.com
Cc: rjw@rjwysocki.net
Cc: linux-acpi@vger.kernel.org
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: bp@suse.de
Link: http://lkml.kernel.org/r/cd401ccdff88f88c8349314febdc25d51f7c48f7.1479844244.git.tim.c.chen@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 2016-11-24 20:44:19 +01:00
Yazen Ghannam
f5382de9d4 x86/mce/AMD: Add system physical address translation for AMD Fam17h 
The Unified Memory Controllers (UMCs) on Fam17h log a normalized address
in their MCA_ADDR registers. We need to convert that normalized address
to a system physical address in order to support a few facilities:

1) To offline poisoned pages in DRAM proactively in the deferred error
   handler.

2) To print sysaddr and page info for DRAM ECC errors in EDAC.

[ Boris: fixes/cleanups ontop:

  * hi_addr_offset = 0 - no need for that branch. Stick it all under the
    HiAddrOffsetEn case. It confines hi_addr_offset's declaration too.

  * Move variables to the innermost scope they're used at so that we save
    on stack and not blow it up immediately on function entry.

  * Do not modify *sys_addr prematurely - we want to not exit early and
    have modified *sys_addr some, which callers get to see. We either
    convert to a sys_addr or we don't do anything. And we signal that with
    the retval of the function.

  * Rename label out -> out_err - because it is the error path.

  * No need to pr_err of the conversion failed case: imagine a
    sparsely-populated machine with UMCs which don't have DIMMs. Callers
    should look at the retval instead and issue a printk only when really
    necessary. No need for useless info in dmesg.

  * s/temp_reg/tmp/ and other variable names shortening => shorter code.

  * Use BIT() everywhere.

  * Make error messages more informative.

  *  Small build fix for the !CONFIG_X86_MCE_AMD case.

  * ... and more minor cleanups.
]

Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Aravind Gopalakrishnan <aravindksg.lkml@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20161122111133.mjzpvzhf7o7yl2oa@pd.tnic
[ Typo fixes. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-11-22 12:30:16 +01:00
Thomas Gleixner
59fe5a77d4 x86/intel_rdt: Select KERNFS when enabling INTEL_RDT_A 
arch/x86/kernel/cpu/intel_rdt_rdtgroup.c: In function 'rdtgroup_kn_lock_live':
arch/x86/kernel/cpu/intel_rdt_rdtgroup.c:658:2: error: implicit declaration of
function 'kernfs_break_active_protection' [-Werror=implicit-function-declaration]

Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Shaohua Li <shli@fb.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
 2016-11-15 18:35:49 +01:00
Ingo Molnar
c763ea2650 x86/kconfig: Sort the 'config X86' selects alphabetically 
This organizes the list a bit, plus reduces future conflicts (if people
remember to insert new options alphabetically that is).

Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-11-15 10:56:20 +01:00
Ingo Molnar
953fee1d82 x86/kconfig: Clean up 32-bit compat options 
Introduce a 'COMPAT_32' helper config value for 'X86_32 || IA32_EMULATION'
and use it.

Also move some selects to this new option, to remove more selects from
the generic X86 section.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-11-15 10:55:03 +01:00
Ingo Molnar
39f88911b9 x86/kconfig: Clean up IA32_EMULATION select 
Move a 'if IA32_EMULATION' select from the generic X86 section
to the IA32_EMULATION option.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-11-15 10:52:21 +01:00
Ingo Molnar
52c8e6017c x86/kconfig, x86/pkeys: Move pkeys selects to X86_INTEL_MEMORY_PROTECTION_KEYS 
Move the pkeys selects from the generic x86 config section to
the X86_INTEL_MEMORY_PROTECTION_KEYS section.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-11-15 10:34:08 +01:00
Ingo Molnar
d94e068573 x86/kconfig: Move 64-bit only arch Kconfig selects to 'config X86_64' 
These are easier to read when they come next to the X86_64 config.

Note that all remaining 'if X86_64' config options in the generic
section are in principle suitable for activation on 32-bit, but have
not been ported yet.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-11-15 10:34:02 +01:00
Ingo Molnar
341c787e34 x86/kconfig: Move 32-bit only arch Kconfig selects to 'config X86_32' 
These are easier to read when they come next to the X86_32 config.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-11-15 10:33:30 +01:00
Fenghua Yu
78e99b4a2b x86/intel_rdt: Add CONFIG, Makefile, and basic initialization 
Introduce CONFIG_INTEL_RDT_A (default: no, dependent on CPU_SUP_INTEL) to
control inclusion of Resource Director Technology in the build.

Simple init() routine just checks which features are present. If they are
pr_info() one line summary for each feature for now.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: "Ravi V Shankar" <ravi.v.shankar@intel.com>
Cc: "Tony Luck" <tony.luck@intel.com>
Cc: "David Carrillo-Cisneros" <davidcc@google.com>
Cc: "Sai Prakhya" <sai.praneeth.prakhya@intel.com>
Cc: "Peter Zijlstra" <peterz@infradead.org>
Cc: "Stephane Eranian" <eranian@google.com>
Cc: "Dave Hansen" <dave.hansen@intel.com>
Cc: "Shaohua Li" <shli@fb.com>
Cc: "Nilay Vaish" <nilayvaish@gmail.com>
Cc: "Vikas Shivappa" <vikas.shivappa@linux.intel.com>
Cc: "Ingo Molnar" <mingo@elte.hu>
Cc: "Borislav Petkov" <bp@suse.de>
Cc: "H. Peter Anvin" <h.peter.anvin@intel.com>
Link: http://lkml.kernel.org/r/1477142405-32078-7-git-send-email-fenghua.yu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 2016-10-26 23:12:38 +02:00
Mauro Carvalho Chehab
8c27ceff36 docs: fix locations of several documents that got moved 
The previous patch renamed several files that are cross-referenced
along the Kernel documentation. Adjust the links to point to
the right places.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
 2016-10-24 08:12:35 -02:00
Vineet Gupta
51a021244b atomic64: no need for CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 
This came to light when implementing native 64-bit atomics for ARCv2.

The atomic64 self-test code uses CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
to check whether atomic64_dec_if_positive() is available.  It seems it
was needed when not every arch defined it.  However as of current code
the Kconfig option seems needless

 - for CONFIG_GENERIC_ATOMIC64 it is auto-enabled in lib/Kconfig and a
   generic definition of API is present lib/atomic64.c
 - arches with native 64-bit atomics select it in arch/*/Kconfig and
   define the API in their headers

So I see no point in keeping the Kconfig option

Compile tested for:
 - blackfin (CONFIG_GENERIC_ATOMIC64)
 - x86 (!CONFIG_GENERIC_ATOMIC64)
 - ia64

Link: http://lkml.kernel.org/r/1473703083-8625-3-git-send-email-vgupta@synopsys.com
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Ming Lin <ming.l@ssi.samsung.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-10-07 18:46:30 -07:00
Yisheng Xie
461a718432 mm/hugetlb: introduce ARCH_HAS_GIGANTIC_PAGE 
Avoid making ifdef get pretty unwieldy if many ARCHs support gigantic
page.  No functional change with this patch.

Link: http://lkml.kernel.org/r/1475227569-63446-2-git-send-email-xieyisheng1@huawei.com
Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
Suggested-by: Michal Hocko <mhocko@suse.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-10-07 18:46:29 -07:00
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)
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJX9pOwAAoJEFmIoMA60/r8NfMQAMEMYK3yv/RQtcQvtB26L2eJ
 Zn6eJXZPFDsaP+uRYrZEEphHccGFJgmtnOEYjo5XH+wUovmj8BxIy58APEGij/69
 iJyaXkI2jRVCOFna6WLJKS0jM6/Lw40RdwrANqHfvzR9N8pEjDD36BglshFNK/pK
 07dYNtI+/sq1j5K1UE6bK4uiAURiPc2SfK4/+M4Mg4SfZMQgLIvpT8VHdercYSXN
 eGA0SHGNm8qIK2JArwa293z6zB0Kw05juLayZHai6PwDqqNMvzgzS4pChGJl4klH
 fFe3bhlBVR2SGh9nuHMgIMWKGKGkjWBjwS1p0ENDgdpBVPXmDIc7Ka8Q0BqAFz+F
 YOmj4BtR8U3mOj942bxYZYqqqt02Brlu+/YkY6+OtNjKWi7w0s24dd5vEfBl2nVV
 T2klW4P9MuCnsutfrxkFL8voJRCIdV3fohwLHfHVfNTZN+bSZnlo9MiywbgQlexV
 5BKIA5z9E87bhvo7Mr8VCZjjEV0E3RrT4sgaJyQhGUGIpuZDiZFHSujBo53jRSdy
 jvIb22cQtmQJAkafID6djcMbXh+LIhXqUfH1ZVqpJFFMJN43zB7dwaMwrLsZgqTi
 ZV7VxZJVN7U6JCQvtNvwLBeKT82T7jxVZoSIogc/UR0gelb6jPN/yiTX5TUzMgPs
 HW7F3hv0AdmYKPcGZJAP
 =0Aq4
 -----END PGP SIGNATURE-----

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
Keith Busch
181ffd19cc x86/PCI: VMD: Move VMD driver to drivers/pci/host 
Move the driver source and Kconfig to the PCI host bridge drivers directory
and move the config option to a more appropriate sub-menu instead of
occupying the top-level location.

Update the Kconfig option with the X86_64 dependency that was implicitly
included from the previous location, and add information about the module
name when built as a loadable module.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Jon Derrick <jonathan.derrick@intel.com>
 2016-10-04 12:26:37 -05:00
Linus Torvalds
a6c4e4cd44 Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 platform changes from Ingo Molnar:
 "The main changes in this cycle were:

   - SGI UV updates (Andrew Banman)

   - Intel MID updates (Andy Shevchenko)

   - Initial Mellanox systems platform (Vadim Pasternak)"

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/platform/mellanox: Fix return value check in mlxplat_init()
  x86/platform/mellanox: Introduce support for Mellanox systems platform
  x86/platform/uv/BAU: Add UV4-specific functions
  x86/platform/uv/BAU: Fix payload queue setup on UV4 hardware
  x86/platform/uv/BAU: Disable software timeout on UV4 hardware
  x86/platform/uv/BAU: Populate ->uvhub_version with UV4 version information
  x86/platform/uv/BAU: Use generic function pointers
  x86/platform/uv/BAU: Add generic function pointers
  x86/platform/uv/BAU: Convert uv_physnodeaddr() use to uv_gpa_to_offset()
  x86/platform/uv/BAU: Clean up pq_init()
  x86/platform/uv/BAU: Clean up and update printks
  x86/platform/uv/BAU: Clean up vertical alignment
  x86/platform/intel-mid: Keep SRAM powered on at boot
  x86/platform/intel-mid: Add Intel Penwell to ID table
  x86/cpu: Rename Merrifield2 to Moorefield
  x86/platform/intel-mid: Implement power off sequence
  x86/platform/intel-mid: Enable SD card detection on Merrifield
  x86/platform/intel-mid: Enable WiFi on Intel Edison
  x86/platform/intel-mid: Run PWRMU command immediately
 2016-10-03 17:22:25 -07:00
Linus Torvalds
1a4a2bc460 Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull low-level x86 updates from Ingo Molnar:
 "In this cycle this topic tree has become one of those 'super topics'
  that accumulated a lot of changes:

   - Add CONFIG_VMAP_STACK=y support to the core kernel and enable it on
     x86 - preceded by an array of changes. v4.8 saw preparatory changes
     in this area already - this is the rest of the work. Includes the
     thread stack caching performance optimization. (Andy Lutomirski)

   - switch_to() cleanups and all around enhancements. (Brian Gerst)

   - A large number of dumpstack infrastructure enhancements and an
     unwinder abstraction. The secret long term plan is safe(r) live
     patching plus maybe another attempt at debuginfo based unwinding -
     but all these current bits are standalone enhancements in a frame
     pointer based debug environment as well. (Josh Poimboeuf)

   - More __ro_after_init and const annotations. (Kees Cook)

   - Enable KASLR for the vmemmap memory region. (Thomas Garnier)"

[ The virtually mapped stack changes are pretty fundamental, and not
  x86-specific per se, even if they are only used on x86 right now. ]

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits)
  x86/asm: Get rid of __read_cr4_safe()
  thread_info: Use unsigned long for flags
  x86/alternatives: Add stack frame dependency to alternative_call_2()
  x86/dumpstack: Fix show_stack() task pointer regression
  x86/dumpstack: Remove dump_trace() and related callbacks
  x86/dumpstack: Convert show_trace_log_lvl() to use the new unwinder
  oprofile/x86: Convert x86_backtrace() to use the new unwinder
  x86/stacktrace: Convert save_stack_trace_*() to use the new unwinder
  perf/x86: Convert perf_callchain_kernel() to use the new unwinder
  x86/unwind: Add new unwind interface and implementations
  x86/dumpstack: Remove NULL task pointer convention
  fork: Optimize task creation by caching two thread stacks per CPU if CONFIG_VMAP_STACK=y
  sched/core: Free the stack early if CONFIG_THREAD_INFO_IN_TASK
  lib/syscall: Pin the task stack in collect_syscall()
  x86/process: Pin the target stack in get_wchan()
  x86/dumpstack: Pin the target stack when dumping it
  kthread: Pin the stack via try_get_task_stack()/put_task_stack() in to_live_kthread() function
  sched/core: Add try_get_task_stack() and put_task_stack()
  x86/entry/64: Fix a minor comment rebase error
  iommu/amd: Don't put completion-wait semaphore on stack
  ...
 2016-10-03 16:13:28 -07:00
Peter Zijlstra
cfd8983f03 x86, locking/spinlocks: Remove ticket (spin)lock implementation 
We've unconditionally used the queued spinlock for many releases now.

Its time to remove the old ticket lock code.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <waiman.long@hpe.com>
Cc: Waiman.Long@hpe.com
Cc: david.vrabel@citrix.com
Cc: dhowells@redhat.com
Cc: pbonzini@redhat.com
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/20160518184302.GO3193@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-09-30 10:56:00 +02:00
Vadim Pasternak
58cbbee239 x86/platform/mellanox: Introduce support for Mellanox systems platform 
Enable system support for the Mellanox Technologies platform, which
provides support for the next Mellanox basic systems: "msx6710",
"msx6720", "msb7700", "msn2700", "msx1410", "msn2410", "msb7800",
"msn2740", "msn2100" and also various number of derivative systems from
the above basic types.

The Kconfig controlling compilation of this code is: MLX_PLATFORM

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Cc: jiri@resnulli.us
Cc: gregkh@linuxfoundation.org
Cc: platform-driver-x86@vger.kernel.org
Cc: geert@linux-m68k.org
Cc: linux@roeck-us.net
Cc: akpm@linux-foundation.org
Cc: mchehab@kernel.org
Cc: davem@davemloft.net
Cc: kvalo@codeaurora.org
Link: http://lkml.kernel.org/r/1474578822-33805-1-git-send-email-vadimp@mellanox.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 2016-09-22 22:13:10 +02:00
Andy Lutomirski
15f4eae70d x86: Move thread_info into task_struct 
Now that most of the thread_info users have been cleaned up,
this is straightforward.

Most of this code was written by Linus.

Originally-from: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jann Horn <jann@thejh.net>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/a50eab40abeaec9cb9a9e3cbdeafd32190206654.1473801993.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-09-15 08:25:13 +02:00
Ingo Molnar
d4b80afbba Merge branch 'linus' into x86/asm, to pick up recent fixes 
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-09-15 08:24:53 +02:00
Josh Poimboeuf
0d025d271e mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS 
There are three usercopy warnings which are currently being silenced for
gcc 4.6 and newer:

1) "copy_from_user() buffer size is too small" compile warning/error

   This is a static warning which happens when object size and copy size
   are both const, and copy size > object size.  I didn't see any false
   positives for this one.  So the function warning attribute seems to
   be working fine here.

   Note this scenario is always a bug and so I think it should be
   changed to *always* be an error, regardless of
   CONFIG_DEBUG_STRICT_USER_COPY_CHECKS.

2) "copy_from_user() buffer size is not provably correct" compile warning

   This is another static warning which happens when I enable
   __compiletime_object_size() for new compilers (and
   CONFIG_DEBUG_STRICT_USER_COPY_CHECKS).  It happens when object size
   is const, but copy size is *not*.  In this case there's no way to
   compare the two at build time, so it gives the warning.  (Note the
   warning is a byproduct of the fact that gcc has no way of knowing
   whether the overflow function will be called, so the call isn't dead
   code and the warning attribute is activated.)

   So this warning seems to only indicate "this is an unusual pattern,
   maybe you should check it out" rather than "this is a bug".

   I get 102(!) of these warnings with allyesconfig and the
   __compiletime_object_size() gcc check removed.  I don't know if there
   are any real bugs hiding in there, but from looking at a small
   sample, I didn't see any.  According to Kees, it does sometimes find
   real bugs.  But the false positive rate seems high.

3) "Buffer overflow detected" runtime warning

   This is a runtime warning where object size is const, and copy size >
   object size.

All three warnings (both static and runtime) were completely disabled
for gcc 4.6 with the following commit:

  2fb0815c9e ("gcc4: disable __compiletime_object_size for GCC 4.6+")

That commit mistakenly assumed that the false positives were caused by a
gcc bug in __compiletime_object_size().  But in fact,
__compiletime_object_size() seems to be working fine.  The false
positives were instead triggered by #2 above.  (Though I don't have an
explanation for why the warnings supposedly only started showing up in
gcc 4.6.)

So remove warning #2 to get rid of all the false positives, and re-enable
warnings #1 and #3 by reverting the above commit.

Furthermore, since #1 is a real bug which is detected at compile time,
upgrade it to always be an error.

Having done all that, CONFIG_DEBUG_STRICT_USER_COPY_CHECKS is no longer
needed.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Byungchul Park <byungchul.park@lge.com>
Cc: Nilay Vaish <nilayvaish@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-08-30 10:10:21 -07:00
Josh Poimboeuf
e4a744ef2f ftrace: Remove CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST from config 
Make HAVE_FUNCTION_GRAPH_FP_TEST a normal define, independent from
kconfig.  This removes some config file pollution and simplifies the
checking for the fp test.

Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Byungchul Park <byungchul.park@lge.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nilay Vaish <nilayvaish@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/2c4e5f05054d6d367f702fd153af7a0109dd5c81.1471607358.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-08-24 12:15:13 +02:00
Andy Lutomirski
e37e43a497 x86/mm/64: Enable vmapped stacks (CONFIG_HAVE_ARCH_VMAP_STACK=y) 
This allows x86_64 kernels to enable vmapped stacks by setting
HAVE_ARCH_VMAP_STACK=y - which enables the CONFIG_VMAP_STACK=y
high level Kconfig option.

There are a couple of interesting bits:

First, x86 lazily faults in top-level paging entries for the vmalloc
area.  This won't work if we get a page fault while trying to access
the stack: the CPU will promote it to a double-fault and we'll die.
To avoid this problem, probe the new stack when switching stacks and
forcibly populate the pgd entry for the stack when switching mms.

Second, once we have guard pages around the stack, we'll want to
detect and handle stack overflow.

I didn't enable it on x86_32.  We'd need to rework the double-fault
code a bit and I'm concerned about running out of vmalloc virtual
addresses under some workloads.

This patch, by itself, will behave somewhat erratically when the
stack overflows while RSP is still more than a few tens of bytes
above the bottom of the stack.  Specifically, we'll get #PF and make
it to no_context and them oops without reliably triggering a
double-fault, and no_context doesn't know about stack overflows.
The next patch will improve that case.

Thank you to Nadav and Brian for helping me pay enough attention to
the SDM to hopefully get this right.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nadav Amit <nadav.amit@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/c88f3e2920b18e6cc621d772a04a62c06869037e.1470907718.git.luto@kernel.org
[ Minor edits. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-08-24 12:11:42 +02:00
Linus Torvalds
1eccfa090e Implements HARDENED_USERCOPY verification of copy_to_user/copy_from_user 
bounds checking for most architectures on SLAB and SLUB.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 Comment: Kees Cook <kees@outflux.net>
 
 iQIcBAABCgAGBQJXl9tlAAoJEIly9N/cbcAm5BoP/ikTtDp2bFw1sn92yHTnIWzl
 O+dcKVAeRgjfnSvPfb1JITpaM58exQSaDsPBeR0DbVzU1zDdhLcwHHiQupFh98Ka
 vBZthbrlL/u4NB26enEEW0iyA32BsxYBMnIu0z5ux9RbZflmQwGQ0c0rvy3dJ7/b
 FzB5ayVST5y/a0m6/sImeeExh78GU9rsMb1XmJRMwlJAy6miDz/F9TP0LnuW6PhG
 J5XC99ygNJS1pQBLACRsrZw6ImgBxXnWCok6tWPMxFfD+rJBU2//wqS+HozyMWHL
 iYP7+ytVo/ZVok4114X/V4Oof3a6wqgpBuYrivJ228QO+UsLYbYLo6sZ8kRK7VFm
 9GgHo/8rWB1T9lBbSaa7UL5r0dVNNLjFGS42vwV+YlgUMQ1A35VRojO0jUnJSIQU
 Ug1IxKmylLd0nEcwD8/l3DXeQABsfL8GsoKW0OtdTZtW4RND4gzq34LK6t7hvayF
 kUkLg1OLNdUJwOi16M/rhugwYFZIMfoxQtjkRXKWN4RZ2QgSHnx2lhqNmRGPAXBG
 uy21wlzUTfLTqTpoeOyHzJwyF2qf2y4nsziBMhvmlrUvIzW1LIrYUKCNT4HR8Sh5
 lC2WMGYuIqaiu+NOF3v6CgvKd9UW+mxMRyPEybH8mEgfm+FLZlWABiBjIUpSEZuB
 JFfuMv1zlljj/okIQRg8
 =USIR
 -----END PGP SIGNATURE-----

Merge tag 'usercopy-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull usercopy protection from Kees Cook:
 "Tbhis implements HARDENED_USERCOPY verification of copy_to_user and
  copy_from_user bounds checking for most architectures on SLAB and
  SLUB"

* tag 'usercopy-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  mm: SLUB hardened usercopy support
  mm: SLAB hardened usercopy support
  s390/uaccess: Enable hardened usercopy
  sparc/uaccess: Enable hardened usercopy
  powerpc/uaccess: Enable hardened usercopy
  ia64/uaccess: Enable hardened usercopy
  arm64/uaccess: Enable hardened usercopy
  ARM: uaccess: Enable hardened usercopy
  x86/uaccess: Enable hardened usercopy
  mm: Hardened usercopy
  mm: Implement stack frame object validation
  mm: Add is_migrate_cma_page
 2016-08-08 14:48:14 -07:00
Linus Torvalds
6c84239d59 RTC for 4.8 
Cleanups:
  - huge cleanup of rtc-generic and char/genrtc this allowed to cleanup rtc-cmos,
   rtc-sh, rtc-m68k, rtc-powerpc and rtc-parisc
  - move mn10300 to rtc-cmos
 
 Subsystem:
  - fix wakealarms after hibernate
  - multiples fixes for rctest
  - simplify implementations of .read_alarm
 
 New drivers:
  - Maxim MAX6916
 
 Drivers:
  - ds1307: fix weekday
  - m41t80: add wakeup support
  - pcf85063: add support for PCF85063A variant
  - rv8803: extend i2c fix and other fixes
  - s35390a: fix alarm reading, this fixes instant reboot after shutdown for QNAP
    TS-41x
  - s3c: clock fixes
 -----BEGIN PGP SIGNATURE-----
 
 iQIcBAABCgAGBQJXokhIAAoJENiigzvaE+LCZqQP+wWzintN/N1u3dKiVB7iSdwq
 +S/jAXD9wW8OK9PI60/YUGRYeUXmZW9t4XYg1VKCxU9KpVC17LgOtDyXD8BufP1V
 uREJEzZw9O7zCCjeHp/ICFjBkc62Net6ZDOO+ZyXPNfddpS1Xq1uUgXLZc/202UR
 ID/kewu0pJRDnoxyqznWn9+8D33w/ygXs2slY2Ive0ONtjdgxGcsj2rNbb2RYn2z
 OP7br3lLg7qkFh4TtXb61eh/9GYIk6wzP/CrX5l/jH4SjQnrIk5g/X/Cd1qQ/qso
 JZzFoonOKvIp5Gw/+fZ9NP3YFcnkoRMv4NjZV8PAmsYLds+ibRiBcoB8u6FmiJV7
 WW5uopgPkfCGN5BV3+QHwJDVe+WlgnlzaT5zPUCcP5KWusDts4fWIgzP7vrtAzf4
 3OJLrgSGdBeOqWnJD21nxKUD27JOseX7D+BFtwxR4lMsXHqlHJfETpZ8gts1ZGH3
 2U353j/jkZvGWmc6dMcuxOXT2K4VqpYeIIqs0IcLu6hM9crtR89zPR2Iu1AilfDW
 h2NroF+Q//SgMMzWoTEG6Tn7RAc7MthgA/tRCFZF9CBMzNs988w0CTHnKsIHmjpU
 UKkMeJGAC9YrPYIcqrg0oYsmLUWXc8JuZbGJBnei3BzbaMTlcwIN9qj36zfq6xWc
 TMLpbWEoIsgFIZMP/hAP
 =rpGB
 -----END PGP SIGNATURE-----

Merge tag 'rtc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

Pull RTC updates from Alexandre Belloni:
 "RTC for 4.8

  Cleanups:
   - huge cleanup of rtc-generic and char/genrtc this allowed to cleanup
     rtc-cmos, rtc-sh, rtc-m68k, rtc-powerpc and rtc-parisc
   - move mn10300 to rtc-cmos

  Subsystem:
   - fix wakealarms after hibernate
   - multiples fixes for rctest
   - simplify implementations of .read_alarm

  New drivers:
   - Maxim MAX6916

  Drivers:
   - ds1307: fix weekday
   - m41t80: add wakeup support
   - pcf85063: add support for PCF85063A variant
   - rv8803: extend i2c fix and other fixes
   - s35390a: fix alarm reading, this fixes instant reboot after
     shutdown for QNAP TS-41x
   - s3c: clock fixes"

* tag 'rtc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (65 commits)
  rtc: rv8803: Clear V1F when setting the time
  rtc: rv8803: Stop the clock while setting the time
  rtc: rv8803: Always apply the I²C workaround
  rtc: rv8803: Fix read day of week
  rtc: rv8803: Remove the check for valid time
  rtc: rv8803: Kconfig: Indicate rx8900 support
  rtc: asm9260: remove .owner field for driver
  rtc: at91sam9: Fix missing spin_lock_init()
  rtc: m41t80: add suspend handlers for alarm IRQ
  rtc: m41t80: make it a real error message
  rtc: pcf85063: Add support for the PCF85063A device
  rtc: pcf85063: fix year range
  rtc: hym8563: in .read_alarm set .tm_sec to 0 to signal minute accuracy
  rtc: explicitly set tm_sec = 0 for drivers with minute accurancy
  rtc: s3c: Add s3c_rtc_{enable/disable}_clk in s3c_rtc_setfreq()
  rtc: s3c: Remove unnecessary call to disable already disabled clock
  rtc: abx80x: use devm_add_action_or_reset()
  rtc: m41t80: use devm_add_action_or_reset()
  rtc: fix a typo and reduce three empty lines to one
  rtc: s35390a: improve two comments in .set_alarm
  ...
 2016-08-05 09:48:22 -04:00
Linus Torvalds
f716a85cd6 Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 
Pull kbuild updates from Michal Marek:

 - GCC plugin support by Emese Revfy from grsecurity, with a fixup from
   Kees Cook.  The plugins are meant to be used for static analysis of
   the kernel code.  Two plugins are provided already.

 - reduction of the gcc commandline by Arnd Bergmann.

 - IS_ENABLED / IS_REACHABLE macro enhancements by Masahiro Yamada

 - bin2c fix by Michael Tautschnig

 - setlocalversion fix by Wolfram Sang

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  gcc-plugins: disable under COMPILE_TEST
  kbuild: Abort build on bad stack protector flag
  scripts: Fix size mismatch of kexec_purgatory_size
  kbuild: make samples depend on headers_install
  Kbuild: don't add obj tree in additional includes
  Kbuild: arch: look for generated headers in obtree
  Kbuild: always prefix objtree in LINUXINCLUDE
  Kbuild: avoid duplicate include path
  Kbuild: don't add ../../ to include path
  vmlinux.lds.h: replace config_enabled() with IS_ENABLED()
  kconfig.h: allow to use IS_{ENABLE,REACHABLE} in macro expansion
  kconfig.h: use already defined macros for IS_REACHABLE() define
  export.h: use __is_defined() to check if __KSYM_* is defined
  kconfig.h: use __is_defined() to check if MODULE is defined
  kbuild: setlocalversion: print error to STDERR
  Add sancov plugin
  Add Cyclomatic complexity GCC plugin
  GCC plugin infrastructure
  Shared library support
 2016-08-02 16:37:12 -04:00
Linus Torvalds
e663107fa1 ACPI material for v4.8-rc1 
- Support for ACPI SSDT overlays allowing Secondary System
    Description Tables (SSDTs) to be loaded at any time from EFI
    variables or via configfs (Octavian Purdila, Mika Westerberg).
 
  - Support for the ACPI LPI (Low-Power Idle) feature introduced in
    ACPI 6.0 and allowing processor idle states to be represented in
    ACPI tables in a hierarchical way (with the help of Processor
    Container objects) and support for ACPI idle states management
    on ARM64, based on LPI (Sudeep Holla).
 
  - General improvements of ACPI support for NUMA and ARM64 support
    for ACPI-based NUMA (Hanjun Guo, David Daney, Robert Richter).
 
  - General improvements of the ACPI table upgrade mechanism and
    ARM64 support for that feature (Aleksey Makarov, Jon Masters).
 
  - Support for the Boot Error Record Table (BERT) in APEI and
    improvements of kernel messages printed by the error injection
    code (Huang Ying, Borislav Petkov).
 
  - New driver for the Intel Broxton WhiskeyCove PMIC operation
    region and support for the REGS operation region on Broxton,
    PMIC code cleanups (Bin Gao, Felipe Balbi, Paul Gortmaker).
 
  - New driver for the power participant device which is part of the
    Dynamic Power and Thermal Framework (DPTF) and DPTF-related code
    reorganization (Srinivas Pandruvada).
 
  - Support for the platform-initiated graceful shutdown feature
    introduced in ACPI 6.1 (Prashanth Prakash).
 
  - ACPI button driver update related to lid input events generated
    automatically on initialization and system resume that have been
    problematic for some time (Lv Zheng).
 
  - ACPI EC driver cleanups (Lv Zheng).
 
  - Documentation of the ACPICA release automation process and the
    in-kernel ACPI AML debugger (Lv Zheng).
 
  - New blacklist entry and two fixes for the ACPI backlight driver
    (Alex Hung, Arvind Yadav, Ralf Gerbig).
 
  - Cleanups of the ACPI pci_slot driver (Joe Perches, Paul Gortmaker).
 
  - ACPI CPPC code changes to make it more robust against possible
    defects in ACPI tables and new symbol definitions for PCC (Hoan
    Tran).
 
  - System reboot code modification to execute the ACPI _PTS (Prepare
    To Sleep) method in addition to _TTS (Ocean He).
 
  - ACPICA-related change to carry out lock ordering checks in ACPICA
    if ACPICA debug is enabled in the kernel (Lv Zheng).
 
  - Assorted minor fixes and cleanups (Andy Shevchenko, Baoquan He,
    Bhaktipriya Shridhar, Paul Gortmaker, Rafael Wysocki).
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.22 (GNU/Linux)
 
 iQIcBAABCAAGBQJXl8A7AAoJEILEb/54YlRxF0kQAI6mH0yan60Osu4598+VNvgv
 wxOWl1TEbKd+LaJkofRZ+FPzZkQf5c/h/8Oo8Q3LEpFhjkARhhX7ThDjS5v2Nx6v
 I/icQ64ynPUPrw6hGNVrmec9ofZjiAs3j3Rt2bEiae+YN6guvfhWE+kBCHo2G/nN
 o4BSaxYjkphUTDSi4/5BfaocV2sl3apvwjtAj8zgGn4RD81bFFLnblynHkqJVcoN
 HAfm7QTVjT01Zkv565OSZgK8CFcD8Ky2KKKBQvcIW8zQmD6IXaoTHSYSwL0SH+oK
 bxUZUmWVfFWw4kDTAY9mw0QwtWz9ODTWh/WMhs3itWRRN5qHfogs99rCVYFtFufQ
 ODVy4wpt4wmpzZVhyUDTTigAhznPAtCam6EpL1YeNbtyrRN4evvZVFHBZJnmhosX
 zI9iLF4eqdnJZKvh+L1VFU+py8aAZpz1ZEOatNMI+xdhArbGm7v89cldzaRkJhuW
 LZr+JqYQGaOZS5qSnymwJL1KfF66+2QGpzdvzJN5FNIDACoqanATbZ/Iie2ENcM+
 WwCEWrGJFDmM30raBNNcvx0yHFtVkcNbOymla4paVg7i29nu88Ynw4Z6seIIP11C
 DryzLFhw+3jdTg2zK/te/wkhciJ0F+iZjo6VXywSMnwatf36bpdp4r4JLUVfEo2t
 8DOGKyFMLYY1zOPMK9Th
 =YwbM
 -----END PGP SIGNATURE-----

Merge tag 'acpi-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

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

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

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

  Specifics:

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

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

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

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

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

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

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

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

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

   - ACPI EC driver cleanups (Lv Zheng).

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

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

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

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

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

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

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

* tag 'acpi-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (71 commits)
  ACPI: enable ACPI_PROCESSOR_IDLE on ARM64
  arm64: add support for ACPI Low Power Idle(LPI)
  drivers: firmware: psci: initialise idle states using ACPI LPI
  cpuidle: introduce CPU_PM_CPU_IDLE_ENTER macro for ARM{32, 64}
  arm64: cpuidle: drop __init section marker to arm_cpuidle_init
  ACPI / processor_idle: Add support for Low Power Idle(LPI) states
  ACPI / processor_idle: introduce ACPI_PROCESSOR_CSTATE
  ACPI / DPTF: move int340x_thermal.c to the DPTF folder
  ACPI / DPTF: Add DPTF power participant driver
  ACPI / lpat: make it explicitly non-modular
  ACPI / dock: make dock explicitly non-modular
  ACPI / PCI: make pci_slot explicitly non-modular
  ACPI / PMIC: remove modular references from non-modular code
  ACPICA: Linux: Enable ACPI_MUTEX_DEBUG for Linux kernel
  ACPI: Rename configfs.c to acpi_configfs.c to prevent link error
  ACPI / debugger: Add AML debugger documentation
  ACPI: Add documentation describing ACPICA release automation
  ACPI: add support for loading SSDTs via configfs
  ACPI: add support for configfs
  efi / ACPI: load SSTDs from EFI variables
  ...
 2016-07-26 17:56:45 -07:00
Kees Cook
5b710f34e1 x86/uaccess: Enable hardened usercopy 
Enables CONFIG_HARDENED_USERCOPY checks on x86. This is done both in
copy_*_user() and __copy_*_user() because copy_*_user() actually calls
down to _copy_*_user() and not __copy_*_user().

Based on code from PaX and grsecurity.

Signed-off-by: Kees Cook <keescook@chromium.org>
Tested-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
 2016-07-26 14:41:48 -07:00
Kees Cook
0f60a8efe4 mm: Implement stack frame object validation 
This creates per-architecture function arch_within_stack_frames() that
should validate if a given object is contained by a kernel stack frame.
Initial implementation is on x86.

This is based on code from PaX.

Signed-off-by: Kees Cook <keescook@chromium.org>
 2016-07-26 14:41:47 -07:00
Linus Torvalds
c265cc5c3c Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 cleanups from Ingo Molnar:
 "Three small cleanups"

* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  lguest: Read offset of device_cap later
  lguest: Read length of device_cap later
  x86: Do away with ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB
 2016-07-25 18:06:00 -07:00
Linus Torvalds
77cd3d0c43 Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 boot updates from Ingo Molnar:
 "The main changes:

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

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

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

   - misc cleanups/fixes"

* 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Simplify EBDA-vs-BIOS reservation logic
  x86/boot: Clarify what x86_legacy_features.reserve_bios_regions does
  x86/boot: Reorganize and clean up the BIOS area reservation code
  x86/mm: Do not reference phys addr beyond kernel
  x86/mm: Add memory hotplug support for KASLR memory randomization
  x86/mm: Enable KASLR for vmalloc memory regions
  x86/mm: Enable KASLR for physical mapping memory regions
  x86/mm: Implement ASLR for kernel memory regions
  x86/mm: Separate variable for trampoline PGD
  x86/mm: Add PUD VA support for physical mapping
  x86/mm: Update physical mapping variable names
  x86/mm: Refactor KASLR entropy functions
  x86/KASLR: Fix boot crash with certain memory configurations
  x86/boot/64: Add forgotten end of function marker
  x86/KASLR: Allow randomization below the load address
  x86/KASLR: Extend kernel image physical address randomization to addresses larger than 4G
  x86/KASLR: Randomize virtual address separately
  x86/KASLR: Clarify identity map interface
  x86/boot: Refuse to build with data relocations
  x86/KASLR, x86/power: Remove x86 hibernation restrictions
 2016-07-25 17:32:28 -07:00
Ingo Molnar
52e31f89cc Merge branch 'linus' into x86/asm, to pick up fixes before merging new changes 
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-07-09 10:43:49 +02:00
Thomas Garnier
90397a4177 x86/mm: Add memory hotplug support for KASLR memory randomization 
Add a new option (CONFIG_RANDOMIZE_MEMORY_PHYSICAL_PADDING) to define
the padding used for the physical memory mapping section when KASLR
memory is enabled. It ensures there is enough virtual address space when
CONFIG_MEMORY_HOTPLUG is used. The default value is 10 terabytes. If
CONFIG_MEMORY_HOTPLUG is not used, no space is reserved increasing the
entropy available.

Signed-off-by: Thomas Garnier <thgarnie@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Alexander Kuleshov <kuleshovmail@gmail.com>
Cc: Alexander Popov <alpopov@ptsecurity.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jan Beulich <JBeulich@suse.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lv Zheng <lv.zheng@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: kernel-hardening@lists.openwall.com
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/1466556426-32664-10-git-send-email-keescook@chromium.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-07-08 17:35:21 +02:00
Thomas Garnier
0483e1fa6e x86/mm: Implement ASLR for kernel memory regions 
Randomizes the virtual address space of kernel memory regions for
x86_64. This first patch adds the infrastructure and does not randomize
any region. The following patches will randomize the physical memory
mapping, vmalloc and vmemmap regions.

This security feature mitigates exploits relying on predictable kernel
addresses. These addresses can be used to disclose the kernel modules
base addresses or corrupt specific structures to elevate privileges
bypassing the current implementation of KASLR. This feature can be
enabled with the CONFIG_RANDOMIZE_MEMORY option.

The order of each memory region is not changed. The feature looks at the
available space for the regions based on different configuration options
and randomizes the base and space between each. The size of the physical
memory mapping is the available physical memory. No performance impact
was detected while testing the feature.

Entropy is generated using the KASLR early boot functions now shared in
the lib directory (originally written by Kees Cook). Randomization is
done on PGD & PUD page table levels to increase possible addresses. The
physical memory mapping code was adapted to support PUD level virtual
addresses. This implementation on the best configuration provides 30,000
possible virtual addresses in average for each memory region.  An
additional low memory page is used to ensure each CPU can start with a
PGD aligned virtual address (for realmode).

x86/dump_pagetable was updated to correctly display each region.

Updated documentation on x86_64 memory layout accordingly.

Performance data, after all patches in the series:

Kernbench shows almost no difference (-+ less than 1%):

Before:

Average Optimal load -j 12 Run (std deviation): Elapsed Time 102.63 (1.2695)
User Time 1034.89 (1.18115) System Time 87.056 (0.456416) Percent CPU 1092.9
(13.892) Context Switches 199805 (3455.33) Sleeps 97907.8 (900.636)

After:

Average Optimal load -j 12 Run (std deviation): Elapsed Time 102.489 (1.10636)
User Time 1034.86 (1.36053) System Time 87.764 (0.49345) Percent CPU 1095
(12.7715) Context Switches 199036 (4298.1) Sleeps 97681.6 (1031.11)

Hackbench shows 0% difference on average (hackbench 90 repeated 10 times):

attemp,before,after 1,0.076,0.069 2,0.072,0.069 3,0.066,0.066 4,0.066,0.068
5,0.066,0.067 6,0.066,0.069 7,0.067,0.066 8,0.063,0.067 9,0.067,0.065
10,0.068,0.071 average,0.0677,0.0677

Signed-off-by: Thomas Garnier <thgarnie@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Alexander Kuleshov <kuleshovmail@gmail.com>
Cc: Alexander Popov <alpopov@ptsecurity.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jan Beulich <JBeulich@suse.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lv Zheng <lv.zheng@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: kernel-hardening@lists.openwall.com
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/1466556426-32664-6-git-send-email-keescook@chromium.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-07-08 17:33:46 +02:00
Ingo Molnar
9e7f7f5425 Merge branch 'x86/mm' into x86/boot, to pick up dependencies 
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-07-08 17:27:47 +02:00
Kees Cook
ed9f007ee6 x86/KASLR: Extend kernel image physical address randomization to addresses larger than 4G 
We want the physical address to be randomized anywhere between
16MB and the top of physical memory (up to 64TB).

This patch exchanges the prior slots[] array for the new slot_areas[]
array, and lifts the limitation of KERNEL_IMAGE_SIZE on the physical
address offset for 64-bit. As before, process_e820_entry() walks
memory and populates slot_areas[], splitting on any detected mem_avoid
collisions.

Finally, since the slots[] array and its associated functions are not
needed any more, so they are removed.

Based on earlier patches by Baoquan He.

Originally-from: Baoquan He <bhe@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: H.J. Lu <hjl.tools@gmail.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1464216334-17200-5-git-send-email-keescook@chromium.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-06-26 12:32:05 +02:00
Arnd Bergmann
d6faca40f4 rtc: move mc146818 helper functions out-of-line 
The mc146818_get_time/mc146818_set_time functions are rather large
inline functions in a global header file and are used in several
drivers and in x86 specific code.

Here we move them into a separate .c file that is compiled whenever
any of the users require it. This also lets us remove the linux/acpi.h
header inclusion from mc146818rtc.h, which in turn avoids some
warnings about duplicate definition of the TRUE/FALSE macros.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
 2016-06-26 01:20:08 +02:00
Aleksey Makarov
91dda51a11 ACPI / tables: introduce ARCH_HAS_ACPI_TABLE_UPGRADE 
We want to use the table upgrade feature in ARM64.
Introduce a new configuration option that allows that.

Signed-off-by: Aleksey Makarov <aleksey.makarov@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2016-06-22 01:16:14 +02:00