linux-kernel - [PATCH v4 00/12] perf: arm

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Message-Id: <20250721-james-perf-feat_spe_eft-v4-0-0a527410f8fd@linaro.org>
Date: Mon, 21 Jul 2025 13:53:31 +0100
From: James Clark <james.clark@...aro.org>
To: Catalin Marinas <catalin.marinas@....com>, 
 Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>, 
 Jonathan Corbet <corbet@....net>, Marc Zyngier <maz@...nel.org>, 
 Oliver Upton <oliver.upton@...ux.dev>, Joey Gouly <joey.gouly@....com>, 
 Suzuki K Poulose <suzuki.poulose@....com>, 
 Zenghui Yu <yuzenghui@...wei.com>, Peter Zijlstra <peterz@...radead.org>, 
 Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Namhyung Kim <namhyung@...nel.org>, 
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
 Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, 
 Adrian Hunter <adrian.hunter@...el.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-perf-users@...r.kernel.org, linux-doc@...r.kernel.org, 
 kvmarm@...ts.linux.dev, Leo Yan <leo.yan@....com>, 
 James Clark <james.clark@...aro.org>
Subject: [PATCH v4 00/12] perf: arm_spe: Armv8.8 SPE features

Support 3 new SPE features: FEAT_SPEv1p4 filters, FEAT_SPE_EFT extended
filtering, and SPE_FEAT_FDS data source filtering. The features are
independent can be applied separately:

  * Prerequisite sysreg changes - patch 1
  * FEAT_SPEv1p4 - patches 2 - 3
  * FEAT_SPE_EFT - patch 4
  * FEAT_SPE_FDS - patches 5 - 9
  * FEAT_SPE_FDS Perf tool changes - patches 10 - 12

The first two features will work with old Perfs but a Perf change to
parse the new config4 is required for the last feature.

---
Changes in v4:
- Rewrite "const u64 feat_spe_eft_bits" inline
- Invert data source filter so that it's possible to exclude all data
  sources without adding an additional 'enable filter' flag
- Add a macro in el2_setup.h to check for an SPE version
- Probe valid filter bits instead of hardcoding them
- Take in Leo's commit to expose the filter bits as it depends on the
  new filter probing
- Link to v3: https://lore.kernel.org/r/20250605-james-perf-feat_spe_eft-v3-0-71b0c9f98093@linaro.org

Changes in v3:
- Use PMSIDR_EL1_FDS instead of 1 << PMSIDR_EL1_FDS_SHIFT
- Add VNCR offsets
- Link to v2: https://lore.kernel.org/r/20250529-james-perf-feat_spe_eft-v2-0-a01a9baad06a@linaro.org

Changes in v2:
- Fix detection of FEAT_SPE_FDS in el2_setup.h
- Pickup Marc Z's sysreg change instead which matches the json
- Restructure and expand docs changes
- Link to v1: https://lore.kernel.org/r/20250506-james-perf-feat_spe_eft-v1-0-dd480e8e4851@linaro.org

---
James Clark (11):
      arm64: sysreg: Add new PMSFCR_EL1 fields and PMSDSFR_EL1 register
      perf: arm_spe: Support FEAT_SPEv1p4 filters
      perf: arm_spe: Add support for FEAT_SPE_EFT extended filtering
      arm64/boot: Factor out a macro to check SPE version
      arm64/boot: Enable EL2 requirements for SPE_FEAT_FDS
      KVM: arm64: Add trap configs for PMSDSFR_EL1
      perf: Add perf_event_attr::config4
      perf: arm_spe: Add support for filtering on data source
      tools headers UAPI: Sync linux/perf_event.h with the kernel sources
      perf tools: Add support for perf_event_attr::config4
      perf docs: arm-spe: Document new SPE filtering features

Leo Yan (1):
      perf: arm_spe: Expose event filter

 Documentation/arch/arm64/booting.rst      |  11 +++
 arch/arm64/include/asm/el2_setup.h        |  28 ++++--
 arch/arm64/include/asm/sysreg.h           |   9 --
 arch/arm64/include/asm/vncr_mapping.h     |   2 +
 arch/arm64/kvm/emulate-nested.c           |   1 +
 arch/arm64/kvm/sys_regs.c                 |   1 +
 arch/arm64/tools/sysreg                   |  13 ++-
 drivers/perf/arm_spe_pmu.c                | 148 ++++++++++++++++++++++++++----
 include/uapi/linux/perf_event.h           |   2 +
 tools/include/uapi/linux/perf_event.h     |   2 +
 tools/perf/Documentation/perf-arm-spe.txt | 104 +++++++++++++++++++--
 tools/perf/tests/parse-events.c           |  14 ++-
 tools/perf/util/parse-events.c            |  11 +++
 tools/perf/util/parse-events.h            |   1 +
 tools/perf/util/parse-events.l            |   1 +
 tools/perf/util/pmu.c                     |   8 ++
 tools/perf/util/pmu.h                     |   1 +
 17 files changed, 312 insertions(+), 45 deletions(-)
---
base-commit: 89be9a83ccf1f88522317ce02f854f30d6115c41
change-id: 20250312-james-perf-feat_spe_eft-66cdf4d8fe99

Best regards,
-- 
James Clark <james.clark@...aro.org>