We'd like all architectures to convert to ARCH_ATOMIC, as once all
architectures are converted it will be possible to make significant
cleanups to the atomics headers, and this will make it much easier to
generically enable atomic functionality (e.g. debug logic in the
instrumented wrappers).

As a step towards that, this patch migrates alpha to ARCH_ATOMIC. The
arch code provides arch_{atomic,atomic64,xchg,cmpxchg}*(), and common
code wraps these with optional instrumentation to provide the regular
functions.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-15-mark.rutland@arm.com

We'd like all architectures to convert to ARCH_ATOMIC, as once all
architectures are converted it will be possible to make significant
cleanups to the atomics headers, and this will make it much easier to
generically enable atomic functionality (e.g. debug logic in the
instrumented wrappers).

As a step towards that, this patch migrates alpha to ARCH_ATOMIC. The
arch code provides arch_{atomic,atomic64,xchg,cmpxchg}*(), and common
code wraps these with optional instrumentation to provide the regular
functions.

Note: xchg_local() is NOT currently part of the generic atomic
arch_atomic API, and is not instrumented.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-14-mark.rutland@arm.com

We'd like all architectures to convert to ARCH_ATOMIC, as this will
enable functionality, and once all architectures are converted it will
be possible to make significant cleanups to the atomic headers.

A number of architectures use asm-generic/cmpxchg.h or
asm-generic/cmpxhg-local.h, and it's impractical to convert the headers
and all these architectures in one go. To make it possible to convert
them one-by-one, let's make the asm-generic implementation function as
either cmpxchg*() or arch_cmpxchg*() depending on whether ARCH_ATOMIC is
selected. To do this, the generic implementations are prefixed as
generic_cmpxchg_*(), and preprocessor definitions map
cmpxchg_*()/arch_cmpxchg_*() onto these as appropriate.

Once all users are moved over to ARCH_ATOMIC the ifdeffery in the header
can be simplified and/or removed entirely.

For existing users (none of which select ARCH_ATOMIC), there should be
no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-13-mark.rutland@arm.com

The asm-generic implementations of cmpxchg_local() and cmpxchg64_local()
use a `_generic` suffix to distinguish themselves from arch code or
wrappers used elsewhere.

Subsequent patches will add ARCH_ATOMIC support to these
implementations, and will distinguish more functions with a `generic`
portion. To align with how ARCH_ATOMIC uses an `arch_` prefix, it would
be helpful to use a `generic_` prefix rather than a `_generic` suffix.

In preparation for this, this patch renames the existing functions to
make `generic` a prefix rather than a suffix. There should be no
functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-12-mark.rutland@arm.com

We'd like all architectures to convert to ARCH_ATOMIC, as this will
enable functionality, and once all architectures are converted it will
be possible to make significant cleanups to the atomic headers.

A number of architectures use asm-generic/atomic64.h, and it's
impractical to convert the header and all these architectures in one go.
To make it possible to convert them one-by-one, let's make the
asm-generic implementation function as either atomic64_*() or
arch_atomic64_*() depending on whether ARCH_ATOMIC is selected. To do
this, the generic implementations are prefixed as generic_atomic64_*(),
and preprocessor definitions map atomic64_*()/arch_atomic64_*() onto
these as appropriate.

Once all users are moved over to ARCH_ATOMIC the ifdeffery in the header
can be simplified and/or removed entirely.

For existing users (none of which select ARCH_ATOMIC), there should be
no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-11-mark.rutland@arm.com

We'd like all architectures to convert to ARCH_ATOMIC, as this will
enable functionality, and once all architectures are converted it will
be possible to make significant cleanups to the atomic headers.

A number of architectures use asm-generic/atomic.h, and it's impractical
to convert the header and all these architectures in one go. To make it
possible to convert them one-by-one, let's make the asm-generic
implementation function as either atomic_*() or arch_atomic_*()
depending on whether ARCH_ATOMIC is selected. To do this, the C
implementations are prefixed as generic_atomic_*(), and preprocessor
definitions map atomic_*()/arch_atomic_*() onto these as
appropriate.

Once all users are moved over to ARCH_ATOMIC the ifdeffery in the header
can be simplified and/or removed entirely.

For existing users (none of which select ARCH_ATOMIC), there should be
no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-10-mark.rutland@arm.com

Now that asm-generic/atomic.h is only used by architectures without any
architecture-specific atomic definitions, we know that there will be no
architecture-specific implementations to override, and can remove the
ifdeffery this has previously required, bringing it into line with
asm-generic/atomic64.h.

At the same time, we can implement atomic_add() and atomic_sub()
directly using ATOMIC_OP(), since we know architectures won't provide
atomic_add_return() or atomic_sub_return().

There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-9-mark.rutland@arm.com

Since commit:

  560cb12a ("locking,arch: Rewrite generic atomic support")

... we conditionally include <linux/irqflags.h> before defining atomics
using locking, and hence do not need to do so unconditionally later in
the header.

This patch removes the redundant include.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-8-mark.rutland@arm.com

The commentary in asm-generic/atomic.h is stale; let's bring it up-to
date:

* The block comment at the start of the file mentions this is only
  usable on UP systems, but is immediately followed by an SMP
  implementation using cmpxchg. Let's delete the misleading statement.

* A comment near the end of the file was originally at the top of the
  file, but over time rework has shuffled it near the end, and it's long
  been superceded by the block comment at the top of the file. Let's
  remove it.

* Since asm-generic/atomic.h isn't the canonical documentation for the
  atomic ops, and since the existing comments are not in kerneldoc
  format, we don't need to document the semantics of each operation here
  (and this would be better done in a centralised document). Let's
  remove these comments.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-7-mark.rutland@arm.com

OpenRISC is the only architecture which uses asm-generic/atomic.h and
also provides its own implementation of some functions, requiring
ifdeferry in the asm-generic header. As OpenRISC provides the vast
majority of functions itself, it would be simpler overall if it also
provided the few functions it cribs from asm-generic.

This patch decouples OpenRISC from asm-generic/atomic.h. Subsequent
patches will simplify the asm-generic implementation and remove the now
unnecessary ifdeferry.

There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Stafford Horne <shorne@gmail.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-6-mark.rutland@arm.com

Microblaze provides its own implementation of atomic_dec_if_positive(),
but nothing else. For a while now, the conditional inc/dec ops have been
optional, and the core code will provide generic implementations using
the code templates in scripts/atomic/fallbacks/.

For simplicity, and for consistency with the other conditional atomic
ops, let's drop the microblaze implementation of
atomic_dec_if_positive(), and use the generic implementation.

With that, we can also drop the local asm/atomic.h and asm/cmpxchg.h
headers, as asm-generic/atomic.h is mandatory-y, and we can pull in
asm-generic/cmpxchg.h via generic-y. This matches what nios2 and nds32
do today.

There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-5-mark.rutland@arm.com

As h8300's implementation of the atomics isn't using any arch-specific
functionality, and its implementation of cmpxchg only uses assembly to
non-atomically swap two elements in memory, we may as well use the
asm-generic atomic.h and cmpxchg.h, and avoid the duplicate code.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-4-mark.rutland@arm.com

As xchg*() and cmpxchg*() may be instrumented by atomic-instrumented.h,
it's necessary to include <linux/atomic.h> to use these, rather than
<asm/cmpxchg.h>, which is effectively an arch-internal header.

In a couple of places we include <asm/cmpxchg.h>, but get away with this
as <linux/atomic.h> gets pulled in inidrectly by another include. Before
we convert more architectures to use atomic-instrumented.h, let's fix
these up to use <linux/atomic.h> so that we don't make things more
fragile.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-3-mark.rutland@arm.com

Subsequent patches will move architectures over to the ARCH_ATOMIC API,
after preparing the asm-generic atomic implementations to function with
or without ARCH_ATOMIC.

As some architectures use the asm-generic implementations exclusively
(and don't have a local atomic.h), and to avoid the risk that
ARCH_ATOMIC isn't defined in some cases we expect, let's make the
ARCH_ATOMIC macro a Kconfig symbol instead, so that we can guarantee it
is consistently available where needed.

There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-2-mark.rutland@arm.com

After pagefaulting in futex_wake_op() both branches do cond_resched()
before retry. Deduplicate it as compilers cannot figure it out themself.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Davidlohr Bueso <dbueso@suse.de>
Link: https://lore.kernel.org/r/9b2588c1fd33c91fb01c4e348a3b647ab2c8baab.1621258128.git.asml.silence@gmail.com

Improve futex timeout testing by checking all the operations that
supports timeout and their available modes.
Signed-off-by: André Almeida <andrealmeid@collabora.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210427135328.11013-3-andrealmeid@collabora.com

When building selftests, the build system will install uapi linux
headers at usr/include in kernel source's root directory. When building
with a different output folder, the headers will be installed at
kselftests/usr/include.

Add both paths so we can build the tests using up-to-date headers.

Currently, this is uncommon to happen since it's rare to find a
build system with an outdated futex header, but it happens
when testing new futex operations.
Signed-off-by: André Almeida <andrealmeid@collabora.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210427135328.11013-2-andrealmeid@collabora.com

A few snuck through.
Signed-off-by: Ingo Molnar <mingo@kernel.org>

Pull btrfs fix from David Sterba:
 "Handle transaction start error in btrfs_fileattr_set()

  This is fix for code introduced by the new fileattr merge"

* tag 'for-5.13-rc1-part2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: handle transaction start error in btrfs_fileattr_set

Add error handling in btrfs_fileattr_set in case of an error while
starting a transaction. This fixes btrfs/232 which otherwise used to
fail with below signature on Power.

  btrfs/232 [ 1119.474650] run fstests btrfs/232 at 2021-04-21 02:21:22
  <...>
  [ 1366.638585] BUG: Unable to handle kernel data access on read at 0xffffffffffffff86
  [ 1366.638768] Faulting instruction address: 0xc0000000009a5c88
  cpu 0x0: Vector: 380 (Data SLB Access) at [c000000014f177b0]
      pc: c0000000009a5c88: btrfs_update_root_times+0x58/0xc0
      lr: c0000000009a5c84: btrfs_update_root_times+0x54/0xc0
      <...>
      pid   = 24881, comm = fsstress
	   btrfs_update_inode+0xa0/0x140
	   btrfs_fileattr_set+0x5d0/0x6f0
	   vfs_fileattr_set+0x2a8/0x390
	   do_vfs_ioctl+0x1290/0x1ac0
	   sys_ioctl+0x6c/0x120
	   system_call_exception+0x3d4/0x410
	   system_call_common+0xec/0x278

Fixes: 97fc2977 ("btrfs: convert to fileattr")
Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Merge tag 'perf-tools-fixes-for-v5.13-2021-05-10' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Fix swapping of cpu_map and stat_config records.

 - Fix dynamic libbpf linking.

 - Disallow -c and -F option at the same time in 'perf record'.

 - Update headers with the kernel originals.

 - Silence warning for JSON ArchStd files.

 - Fix a build error on arm64 with clang.

* tag 'perf-tools-fixes-for-v5.13-2021-05-10' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  tools headers UAPI: Sync perf_event.h with the kernel sources
  tools headers cpufeatures: Sync with the kernel sources
  tools include UAPI powerpc: Sync errno.h with the kernel headers
  tools arch: Update arch/x86/lib/mem{cpy,set}_64.S copies used in 'perf bench mem memcpy'
  tools headers UAPI: Sync linux/prctl.h with the kernel sources
  tools headers UAPI: Sync files changed by landlock, quotactl_path and mount_settattr new syscalls
  perf tools: Fix a build error on arm64 with clang
  tools headers kvm: Sync kvm headers with the kernel sources
  tools headers UAPI: Sync linux/kvm.h with the kernel sources
  perf tools: Fix dynamic libbpf link
  perf session: Fix swapping of cpu_map and stat_config records
  perf jevents: Silence warning for ArchStd files
  perf record: Disallow -c and -F option at the same time
  tools arch x86: Sync the msr-index.h copy with the kernel sources
  tools headers UAPI: Sync drm/i915_drm.h with the kernel sources
  tools headers UAPI: Update tools's copy of drm.h headers

Pull btrfs fixes from David Sterba:
 "First batch of various fixes, here's a list of notable ones:

   - fix unmountable seed device after fstrim

   - fix silent data loss in zoned mode due to ordered extent splitting

   - fix race leading to unpersisted data and metadata on fsync

   - fix deadlock when cloning inline extents and using qgroups"

* tag 'for-5.13-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: initialize return variable in cleanup_free_space_cache_v1
  btrfs: zoned: sanity check zone type
  btrfs: fix unmountable seed device after fstrim
  btrfs: fix deadlock when cloning inline extents and using qgroups
  btrfs: fix race leading to unpersisted data and metadata on fsync
  btrfs: do not consider send context as valid when trying to flush qgroups
  btrfs: zoned: fix silent data loss after failure splitting ordered extent

Pull kvm fixes from Paolo Bonzini:

 - Lots of bug fixes.

 - Fix virtualization of RDPID

 - Virtualization of DR6_BUS_LOCK, which on bare metal is new to this
   release

 - More nested virtualization migration fixes (nSVM and eVMCS)

 - Fix for KVM guest hibernation

 - Fix for warning in SEV-ES SRCU usage

 - Block KVM from loading on AMD machines with 5-level page tables, due
   to the APM not mentioning how host CR4.LA57 exactly impacts the
   guest.

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (48 commits)
  KVM: SVM: Move GHCB unmapping to fix RCU warning
  KVM: SVM: Invert user pointer casting in SEV {en,de}crypt helpers
  kvm: Cap halt polling at kvm->max_halt_poll_ns
  tools/kvm_stat: Fix documentation typo
  KVM: x86: Prevent deadlock against tk_core.seq
  KVM: x86: Cancel pvclock_gtod_work on module removal
  KVM: x86: Prevent KVM SVM from loading on kernels with 5-level paging
  KVM: X86: Expose bus lock debug exception to guest
  KVM: X86: Add support for the emulation of DR6_BUS_LOCK bit
  KVM: PPC: Book3S HV: Fix conversion to gfn-based MMU notifier callbacks
  KVM: x86: Hide RDTSCP and RDPID if MSR_TSC_AUX probing failed
  KVM: x86: Tie Intel and AMD behavior for MSR_TSC_AUX to guest CPU model
  KVM: x86: Move uret MSR slot management to common x86
  KVM: x86: Export the number of uret MSRs to vendor modules
  KVM: VMX: Disable loading of TSX_CTRL MSR the more conventional way
  KVM: VMX: Use common x86's uret MSR list as the one true list
  KVM: VMX: Use flag to indicate "active" uret MSRs instead of sorting list
  KVM: VMX: Configure list of user return MSRs at module init
  KVM: x86: Add support for RDPID without RDTSCP
  KVM: SVM: Probe and load MSR_TSC_AUX regardless of RDTSCP support in host
  ...

To pick up the changes in:

  2b26f0aa ("perf: Support only inheriting events if cloned with CLONE_THREAD")
  2e498d0a ("perf: Add support for event removal on exec")
  547b6098 ("perf: aux: Add flags for the buffer format")
  55bcf6ef ("perf: Extend PERF_TYPE_HARDWARE and PERF_TYPE_HW_CACHE")
  7dde5176 ("perf: aux: Add CoreSight PMU buffer formats")
  97ba62b2 ("perf: Add support for SIGTRAP on perf events")
  d0d1dd62 ("perf core: Add PERF_COUNT_SW_CGROUP_SWITCHES event")

Also change the expected sizeof(struct perf_event_attr) from 120 to 128 due to
fields being added for the SIGTRAP changes.

Addressing this perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/perf_event.h' differs from latest version at 'include/uapi/linux/perf_event.h'
  diff -u tools/include/uapi/linux/perf_event.h include/uapi/linux/perf_event.h

Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Marco Elver <elver@google.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

To pick the changes from:

  4e629211 ("x86/paravirt: Add new features for paravirt patching")
  a161545a ("x86/cpufeatures: Enumerate Intel Hybrid Technology feature bit")
  a89dfde3 ("x86: Remove dynamic NOP selection")
  b8921dcc ("x86/cpufeatures: Add SGX1 and SGX2 sub-features")
  f21d4d3b ("x86/cpufeatures: Enumerate #DB for bus lock detection")
  f333374e ("x86/cpufeatures: Add the Virtual SPEC_CTRL feature")

This only causes these perf files to be rebuilt:

  CC       /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o
  CC       /tmp/build/perf/bench/mem-memset-x86-64-asm.o

And addresses this perf build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h'
  diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h

Cc: Babu Moger <babu.moger@amd.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

To pick the change in:

  7de21e67 ("powerpc: fix EDEADLOCK redefinition error in uapi/asm/errno.h")

That will make the errno number -> string tables to pick this change on powerpc.

Silencing this perf build warning:

  Warning: Kernel ABI header at 'tools/arch/powerpc/include/uapi/asm/errno.h' differs from latest version at 'arch/powerpc/include/uapi/asm/errno.h'
  diff -u tools/arch/powerpc/include/uapi/asm/errno.h arch/powerpc/include/uapi/asm/errno.h

Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Tony Ambardar <tony.ambardar@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

To bring in the change made in this cset:

 5e21a3ec ("x86/alternative: Merge include files")

This just silences these perf tools build warnings, no change in the tools:

  Warning: Kernel ABI header at 'tools/arch/x86/lib/memcpy_64.S' differs from latest version at 'arch/x86/lib/memcpy_64.S'
  diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S
  Warning: Kernel ABI header at 'tools/arch/x86/lib/memset_64.S' differs from latest version at 'arch/x86/lib/memset_64.S'
  diff -u tools/arch/x86/lib/memset_64.S arch/x86/lib/memset_64.S

Cc: Borislav Petkov <bp@suse.de>
Cc: Juergen Gross <jgross@suse.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

To pick a new prctl introduced in:

  20169862 ("arm64: Introduce prctl(PR_PAC_{SET,GET}_ENABLED_KEYS)")

That results in

  $ grep prctl tools/perf/trace/beauty/*.sh
  tools/perf/trace/beauty/prctl_option.sh:printf "static const char *prctl_options[] = {\n"
  tools/perf/trace/beauty/prctl_option.sh:egrep $regex ${header_dir}/prctl.h | grep -v PR_SET_PTRACER | \
  tools/perf/trace/beauty/prctl_option.sh:printf "static const char *prctl_set_mm_options[] = {\n"
  tools/perf/trace/beauty/prctl_option.sh:egrep $regex ${header_dir}/prctl.h | \
  tools/perf/trace/beauty/x86_arch_prctl.sh:prctl_arch_header=${x86_header_dir}/prctl.h
  tools/perf/trace/beauty/x86_arch_prctl.sh:	printf "#define x86_arch_prctl_codes_%d_offset %s\n" $idx $first_entry
  tools/perf/trace/beauty/x86_arch_prctl.sh:	printf "static const char *x86_arch_prctl_codes_%d[] = {\n" $idx
  tools/perf/trace/beauty/x86_arch_prctl.sh:	egrep -q $regex ${prctl_arch_header} && \
  tools/perf/trace/beauty/x86_arch_prctl.sh:	(egrep $regex ${prctl_arch_header} | \
  $ tools/perf/trace/beauty/prctl_option.sh > before
  $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h
  $ tools/perf/trace/beauty/prctl_option.sh > after
  $ diff -u before after
  --- before	2021-05-09 10:06:10.064559675 -0300
  +++ after	2021-05-09 10:06:21.319791396 -0300
  @@ -54,6 +54,8 @@
   	[57] = "SET_IO_FLUSHER",
   	[58] = "GET_IO_FLUSHER",
   	[59] = "SET_SYSCALL_USER_DISPATCH",
  +	[60] = "PAC_SET_ENABLED_KEYS",
  +	[61] = "PAC_GET_ENABLED_KEYS",
   };
   static const char *prctl_set_mm_options[] = {
   	[1] = "START_CODE",
  $

Now users can do:

  # perf trace -e syscalls:sys_enter_prctl --filter "option==PAC_GET_ENABLED_KEYS"
^C#
  # trace -v -e syscalls:sys_enter_prctl --filter "option==PAC_GET_ENABLED_KEYS"
  New filter for syscalls:sys_enter_prctl: (option==0x3d) && (common_pid != 5519 && common_pid != 3404)
^C#

And also when prctl appears in a session, its options will be
translated to the string.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Peter Collingbourne <pcc@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

To pick the changes in these csets:

  a49f4f81 ("arch: Wire up Landlock syscalls")
  2a186721 ("fs: add mount_setattr()")
  fa8b9007 ("quota: wire up quotactl_path")

That silences these perf build warnings and add support for those new
syscalls in tools such as 'perf trace'.

For instance, this is now possible:

  # ~acme/bin/perf trace -v -e landlock*
  event qualifier tracepoint filter: (common_pid != 129365 && common_pid != 3502) && (id == 444 || id == 445 || id == 446)
  ^C#

That is tha filter expression attached to the raw_syscalls:sys_{enter,exit}
tracepoints.

  $ grep landlock tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
  444	common	landlock_create_ruleset	sys_landlock_create_ruleset
  445	common	landlock_add_rule	sys_landlock_add_rule
  446	common	landlock_restrict_self	sys_landlock_restrict_self
  $

This addresses these perf build warnings:

  Warning: Kernel ABI header at 'tools/include/uapi/asm-generic/unistd.h' differs from latest version at 'include/uapi/asm-generic/unistd.h'
  diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h
  Warning: Kernel ABI header at 'tools/perf/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version at 'arch/x86/entry/syscalls/syscall_64.tbl'
  diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
  Warning: Kernel ABI header at 'tools/perf/arch/powerpc/entry/syscalls/syscall.tbl' differs from latest version at 'arch/powerpc/kernel/syscalls/syscall.tbl'
  diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
  Warning: Kernel ABI header at 'tools/perf/arch/s390/entry/syscalls/syscall.tbl' differs from latest version at 'arch/s390/kernel/syscalls/syscall.tbl'
  diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl
  Warning: Kernel ABI header at 'tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl' differs from latest version at 'arch/mips/kernel/syscalls/syscall_n64.tbl'
  diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl arch/mips/kernel/syscalls/syscall_n64.tbl

Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: James Morris <jamorris@linux.microsoft.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Mickaël Salaün <mic@linux.microsoft.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Since clang's -Wmissing-field-initializers warns if a data
structure is initialized with a signle NULL as below,

 ----
 tools/perf $ make CC=clang LLVM=1
 ...
 arch/arm64/util/kvm-stat.c:74:9: error: missing field 'ops' initializer [-Werror,-Wmissing-field-initializers]
         { NULL },
                ^
 1 error generated.
 ----

add another field initializer expressly as same as other
arch's kvm-stat.c code.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Anders Roxell <anders.roxell@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Link: http://lore.kernel.org/lkml/162037767540.94840.15758657049033010518.stgit@devnote2Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

To pick the changes in:

  3c0c2ad1 ("KVM: VMX: Add basic handling of VM-Exit from SGX enclave")

None of them trigger any changes in tooling, this time this is just to silence
these perf build warnings:

  Warning: Kernel ABI header at 'tools/arch/x86/include/uapi/asm/vmx.h' differs from latest version at 'arch/x86/include/uapi/asm/vmx.h'
  diff -u tools/arch/x86/include/uapi/asm/vmx.h arch/x86/include/uapi/asm/vmx.h

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

To pick the changes in:

  15fb7de1 ("KVM: SVM: Add KVM_SEV_RECEIVE_UPDATE_DATA command")
  3bf72569 ("KVM: arm64: Add support for the KVM PTP service")
  4cfdd47d ("KVM: SVM: Add KVM_SEV SEND_START command")
  54526d1f ("KVM: x86: Support KVM VMs sharing SEV context")
  5569e2e7 ("KVM: SVM: Add support for KVM_SEV_SEND_CANCEL command")
  8b13c364 ("KVM: introduce KVM_CAP_SET_GUEST_DEBUG2")
  af43cbbf ("KVM: SVM: Add support for KVM_SEV_RECEIVE_START command")
  d3d1af85 ("KVM: SVM: Add KVM_SEND_UPDATE_DATA command")
  fe7e9488 ("KVM: x86: Add capability to grant VM access to privileged SGX attribute")

That don't cause any change in tooling as it doesn't introduce any new
ioctl.

  $ grep kvm tools/perf/trace/beauty/*.sh
  tools/perf/trace/beauty/kvm_ioctl.sh:printf "static const char *kvm_ioctl_cmds[] = {\n"
  tools/perf/trace/beauty/kvm_ioctl.sh:egrep $regex ${header_dir}/kvm.h	| \
  $
  $ tools/perf/trace/beauty/kvm_ioctl.sh > before
  $ cp include/uapi/linux/kvm.h tools/include/uapi/linux/kvm.h
  $ tools/perf/trace/beauty/kvm_ioctl.sh > after
  $ diff -u before after
  $

This silences this perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h'
  diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h

Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Jianyong Wu <jianyong.wu@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Nathan Tempelman <natet@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steve Rutherford <srutherford@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Justin reported broken build with LIBBPF_DYNAMIC=1.

When linking libbpf dynamically we need to use perf's
hashmap object, because it's not exported in libbpf.so
(only in libbpf.a).

Following build is now passing:

  $ make LIBBPF_DYNAMIC=1
    BUILD:   Doing 'make -j8' parallel build
    ...
  $ ldd perf | grep libbpf
        libbpf.so.0 => /lib64/libbpf.so.0 (0x00007fa7630db000)

Fixes: eee19501 ("perf tools: Grab a copy of libbpf's hashmap")
Reported-by: Justin M. Forbes <jforbes@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210508205020.617984-1-jolsa@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

'data' field in perf_record_cpu_map_data struct is 16-bit
wide and so should be swapped using bswap_16().

'nr' field in perf_record_stat_config struct should be
swapped before being used for size calculation.
Signed-off-by: Dmitry Koshelev <karaghiozis@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210506131244.13328-1-karaghiozis@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

JSON files in the level 1 directory are used for ArchStd events (see
preprocess_arch_std_files), as such they shouldn't be warned about.
Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joakim Zhang <qiangqing.zhang@nxp.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kim Phillips <kim.phillips@amd.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210506225640.1461000-1-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

It's confusing which one is effective when the both options are given.
The current code happens to use -c in this case but users might not be
aware of it.  We can change it to complain about that instead of relying
on the implicit priority.

Before:

  $ perf record -c 111111 -F 99 true
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.031 MB perf.data (8 samples) ]

  $ perf evlist -F
  cycles: sample_period=111111
  $

After:
  $ perf record -c 111111 -F 99 true
  cannot set frequency and period at the same time
  $

So this change can break existing usages, but I think it's rare to have
both options and it'd be better changing them.
Suggested-by: Alexey Alexandrov <aalexand@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210402094020.28164-1-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

To pick up the changes from these csets:

  d0946a88 ("perf/x86/intel: Hybrid PMU support for perf capabilities")

That cause no changes to tooling as it isn't adding any new MSR, just
some capabilities for a pre-existing one:

  $ tools/perf/trace/beauty/tracepoints/x86_msr.sh > before
  $ cp arch/x86/include/asm/msr-index.h tools/arch/x86/include/asm/msr-index.h
  $ tools/perf/trace/beauty/tracepoints/x86_msr.sh > after
  $ diff -u before after
  $

Just silences this perf build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/include/asm/msr-index.h' differs from latest version at 'arch/x86/include/asm/msr-index.h'
  diff -u tools/arch/x86/include/asm/msr-index.h arch/x86/include/asm/msr-index.h

Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

To pick the changes in:

  b5b6f6a6 ("drm/i915/gem: Drop legacy execbuffer support (v2)")

That don't result in any change in tooling as this is just adding a
comment.

Only silences this perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/drm/i915_drm.h' differs from latest version at 'include/uapi/drm/i915_drm.h'
  diff -u tools/include/uapi/drm/i915_drm.h include/uapi/drm/i915_drm.h

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Picking the changes from:

  b603e810 ("drm/uapi: document kernel capabilities")

Doesn't result in any tooling changes:

  $ tools/perf/trace/beauty/drm_ioctl.sh  > before
  $ cp include/uapi/drm/drm.h tools/include/uapi/drm/drm.h
  $ tools/perf/trace/beauty/drm_ioctl.sh  > after
  $ diff -u before after

Silencing these perf build warnings:

  Warning: Kernel ABI header at 'tools/include/uapi/drm/drm.h' differs from latest version at 'include/uapi/drm/drm.h'
  diff -u tools/include/uapi/drm/drm.h include/uapi/drm/drm.h

Cc: Simon Ser <contact@emersion.fr>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>