linux-kernel - [PATCH v2 0/4] arm_pmu: Add PERF_PMU_CAP_EXTENDED_HW

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Message-Id: <20230724134500.970496-1-james.clark@arm.com>
Date:   Mon, 24 Jul 2023 14:44:55 +0100
From:   James Clark <james.clark@....com>
To:     linux-perf-users@...r.kernel.org, irogers@...gle.com,
        anshuman.khandual@....com, will@...nel.org
Cc:     James Clark <james.clark@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2 0/4] arm_pmu: Add PERF_PMU_CAP_EXTENDED_HW_TYPE capability

Changes since v1:

  * Removed "legacy" description of PERF_TYPE_HARDWARE and
    PERF_TYPE_HW_CACHE events
  * Shift down remaining capability bits instead of inserting
    /* Unused */ in the gap (last commit)

Applies to v6.5-rc3

---------------------

This came out of the discussion here [1]. It seems like we can get some
extra big.LITTLE stuff working pretty easily. The test issues mentioned
in the linked thread are actually fairly unrelated and I've fixed them
in a different set on the list.

After adding it in the first commit, the remaining ones tidy up a
related capability that doesn't do anything any more.

I've added a fixes tag for the commit where
PERF_PMU_CAP_EXTENDED_HW_TYPE was originally added because it probably
should have been added to the Arm PMU at the same time. It doesn't apply
cleanly that far back because another capability was added between then,
but the resolution is trivial.

Thanks
James

[1]: https://lore.kernel.org/linux-perf-users/CAP-5=fVkRc9=ySJ=fG-SQ8oAKmE_1mhHHzSASmGHUsda5Qy92A@mail.gmail.com/T/#t

James Clark (4):
  arm_pmu: Add PERF_PMU_CAP_EXTENDED_HW_TYPE capability
  perf/x86: Remove unused PERF_PMU_CAP_HETEROGENEOUS_CPUS capability
  arm_pmu: Remove unused PERF_PMU_CAP_HETEROGENEOUS_CPUS capability
  perf: Remove unused PERF_PMU_CAP_HETEROGENEOUS_CPUS capability

 arch/x86/events/core.c     |  1 -
 drivers/perf/arm_pmu.c     | 10 ++++++----
 include/linux/perf_event.h |  7 +++----
 3 files changed, 9 insertions(+), 9 deletions(-)

-- 
2.34.1