[GIT PULL] perf tools fixes for v7.0: 2nd batch

[GIT PULL] perf tools fixes for v7.0: 2nd batch

[Arnaldo Carvalho de Melo]

Hi Linus,

	Please consider pulling,

Best regards,

- Arnaldo

The following changes since commit 04a9f1766954687f0a1b7a0f7184dc4f86edcb30:

  Merge tag 'soc-fixes-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc (2026-03-18 08:28:54 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools.git tags/perf-tools-fixes-for-v7.0-2-2026-03-23

for you to fetch changes up to 493ad070cbcb0d62deed877d90e80e554cac7f01:

  tools headers: Synchronize linux/build_bug.h with the kernel sources (2026-03-22 18:34:39 -0300)

----------------------------------------------------------------
perf tools fixes for v7.0: 2nd batch

o Fix parsing 'overwrite' in command line event definitions in
  big-endian machines by writing correct union member.

o Fix finding default metric in 'perf stat'.

o Fix relative paths for including headers in 'perf kvm stat'.

o Sync header copies with the kernel sources: msr-index.h, kvm,
  build_bug.h.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
--
2.53.0

----------------------------------------------------------------
Arnaldo Carvalho de Melo (5):
      Merge remote-tracking branch 'torvalds/master' into perf-tools
      tools arch x86: Sync the msr-index.h copy with the kernel sources
      tools headers UAPI: Sync linux/kvm.h with the kernel sources
      tools headers UAPI: Sync x86's asm/kvm.h with the kernel sources
      tools headers: Synchronize linux/build_bug.h with the kernel sources

Ian Rogers (1):
      perf metricgroup: Fix metricgroup__has_metric_or_groups()

Leo Yan (2):
      tools headers: Skip arm64 cputype.h check
      perf kvm stat: Fix relative paths for including headers

Thomas Richter (1):
      perf parse-events: Fix big-endian 'overwrite' by writing correct union member

 tools/arch/x86/include/asm/msr-index.h       |  5 +-
 tools/arch/x86/include/uapi/asm/kvm.h        |  1 +
 tools/include/linux/build_bug.h              |  4 +-
 tools/include/uapi/linux/kvm.h               |  8 +++
 tools/perf/check-headers.sh                  |  1 -
 tools/perf/util/kvm-stat-arch/kvm-stat-x86.c |  6 +-
 tools/perf/util/metricgroup.c                |  6 +-
 tools/perf/util/parse-events.c               | 82 ++++++++++++++++++++++------
 8 files changed, 87 insertions(+), 26 deletions(-)

Re: [GIT PULL] perf tools fixes for v7.0: 2nd batch

[Linus Torvalds]

On Mon, 23 Mar 2026 at 03:57, Arnaldo Carvalho de Melo <acme@kernel.org> wrote:
>
>       tools arch x86: Sync the msr-index.h copy with the kernel sources
>       tools headers UAPI: Sync linux/kvm.h with the kernel sources
>       tools headers UAPI: Sync x86's asm/kvm.h with the kernel sources
>       tools headers: Synchronize linux/build_bug.h with the kernel sources

So I think we need to come up with some solution to *not* do this all,
because honestly, it's getting hugely annoying.

And it's not annoying due to the unnecessary diffs per se, but because
this tool header sync then causes 'objtool' - which also uses some of
those headers - to be rebuilt, and then that causes *everything* to be
rebuilt.

Just because the perf tree decided it needed to sync headers for
unexplained reasons.

The docs say "this works surprisingly well". That *used* to be the
case. But with objtool also being affected, it really does *not* work
well at all.

And no, the tools cannot use the kernel headers directly. That
*really* didn't work well, and required synchronizing kernel changes
with tooling changes, and was just a pain.

So the "header copies" solved a real problem, but we need to figure
out something better.

And honestly, the "something better" may be to just remove the
mindless check for "headers aren't 100% sync".

Because 99% of the time nobody cares. This time, for example, the
header changes in question were comments and stuff that was inside a
__KERNEL__ guard.

So how about just at least as a first step trying to remove the
warning that is actively detrimental, and only do header syncs when
there is a *real* reason for them?

                 Linus

Re: [GIT PULL] perf tools fixes for v7.0: 2nd batch

[pr-tracker-bot]

The pull request you sent on Mon, 23 Mar 2026 07:57:25 -0300:

> git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools.git tags/perf-tools-fixes-for-v7.0-2-2026-03-23

has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/26a01984ddc1e67025fd150e845ab61d5271d6b7

Thank you!

-- 
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