linux-kernel - [RFC V1 00/11] arm64/perf: Enable branch stack sampling

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Message-Id: <1642998653-21377-1-git-send-email-anshuman.khandual@arm.com>
Date:   Mon, 24 Jan 2022 10:00:42 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     Anshuman Khandual <anshuman.khandual@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        linux-perf-users@...r.kernel.org
Subject: [RFC V1 00/11] arm64/perf: Enable branch stack sampling

This series enables perf branch stack sampling support on arm64 platform
via a new arch feature called Branch Record Buffer Extension (BRBE). All
relevant register definitions could be accessed here.

https://developer.arm.com/documentation/ddi0601/2021-12/AArch64-Registers

The last two patches extend the perf ABI to accommodate additional branch
information that can be captured in BRBE. This series applies on v5.17-rc1.

Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-perf-users@...r.kernel.org
Cc: linux-kernel@...r.kernel.org

Anshuman Khandual (11):
  perf: Consolidate branch sample filter helpers
  arm64/perf: Add register definitions for BRBE
  arm64/perf: Update struct arm_pmu for BRBE
  arm64/perf: Update struct pmu_hw_events for BRBE
  arm64/perf: Detect support for BRBE
  arm64/perf: Drive BRBE from perf event states
  arm64/perf: Add BRBE driver
  arm64/perf: Enable branch stack sampling
  perf: Add more generic branch types
  perf: Expand perf_branch_entry.type
  perf: Capture branch privilege information

 arch/arm64/include/asm/sysreg.h          | 216 ++++++++++++
 arch/arm64/kernel/perf_event.c           |  48 +++
 arch/x86/events/intel/lbr.c              |   4 +-
 drivers/perf/Kconfig                     |  11 +
 drivers/perf/Makefile                    |   1 +
 drivers/perf/arm_pmu.c                   |  65 +++-
 drivers/perf/arm_pmu_brbe.c              | 432 +++++++++++++++++++++++
 drivers/perf/arm_pmu_brbe.h              | 259 ++++++++++++++
 drivers/perf/arm_pmu_platform.c          |  34 ++
 include/linux/perf/arm_pmu.h             |  49 +++
 include/linux/perf_event.h               |  24 ++
 include/uapi/linux/perf_event.h          |  26 +-
 kernel/events/core.c                     |   9 +-
 tools/include/uapi/linux/perf_event.h    |  26 +-
 tools/perf/Documentation/perf-record.txt |   1 +
 tools/perf/util/branch.c                 |  13 +-
 tools/perf/util/parse-branch-options.c   |   1 +
 17 files changed, 1202 insertions(+), 17 deletions(-)
 create mode 100644 drivers/perf/arm_pmu_brbe.c
 create mode 100644 drivers/perf/arm_pmu_brbe.h

-- 
2.25.1