linux-kernel - [PATCH v2 0/7] perf: Arm SPEv1.2 support

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Message-Id: <20220825-arm-spe-v8-7-v2-0-e37322d68ac0@kernel.org>
Date:   Wed, 19 Oct 2022 14:11:23 -0500
From:   Rob Herring <robh@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>,
        James Morse <james.morse@....com>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Marc Zyngier <maz@...nel.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Will Deacon <will@...nel.org>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     kvmarm@...ts.cs.columbia.edu, kvmarm@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH v2 0/7] perf: Arm SPEv1.2 support

This series adds support for Arm SPEv1.2 which is part of the
Armv8.7/Armv9.2 architecture. There's 2 new features that affect the 
kernel: a new event filter bit, branch 'not taken', and an inverted 
event filter register. 

Since this support adds new registers and fields, first the SPE register 
defines are converted to automatic generation.

Note that the 'config3' addition in sysfs format files causes SPE to 
break. A stable fix e552b7be12ed ("perf: Skip and warn on unknown format 
'configN' attrs") landed in v6.1-rc1.

The perf tool side changes are available here[1].

Tested on FVP.

[1] https://lore.kernel.org/all/20220914-arm-perf-tool-spe1-2-v2-v4-0-83c098e6212e@kernel.org/

Signed-off-by: Rob Herring <robh@...nel.org>
---
Changes in v2:
- Convert the SPE register defines to automatic generation
- Fixed access to SYS_PMSNEVFR_EL1 when not present
- Rebase on v6.1-rc1
- Link to v1: https://lore.kernel.org/r/20220825-arm-spe-v8-7-v1-0-c75b8d92e692@kernel.org

---
Rob Herring (7):
      perf: arm_spe: Use feature numbering for PMSEVFR_EL1 defines
      arm64: Drop SYS_ from SPE register defines
      arm64/sysreg: Convert SPE registers to automatic generation
      perf: arm_spe: Drop BIT() and use FIELD_GET/PREP accessors
      perf: arm_spe: Support new SPEv1.2/v8.7 'not taken' event
      perf: Add perf_event_attr::config3
      perf: arm_spe: Add support for SPEv1.2 inverted event filtering

 arch/arm64/include/asm/el2_setup.h |   6 +-
 arch/arm64/include/asm/sysreg.h    |  99 +++------------------------
 arch/arm64/kvm/debug.c             |   2 +-
 arch/arm64/kvm/hyp/nvhe/debug-sr.c |   2 +-
 arch/arm64/tools/sysreg            | 116 +++++++++++++++++++++++++++++++
 drivers/perf/arm_spe_pmu.c         | 136 ++++++++++++++++++++++++-------------
 include/uapi/linux/perf_event.h    |   3 +
 7 files changed, 224 insertions(+), 140 deletions(-)
---
base-commit: 9abf2313adc1ca1b6180c508c25f22f9395cc780
change-id: 20220825-arm-spe-v8-7-fedf04e16f23

Best regards,
-- 
Rob Herring <robh@...nel.org>