linux-kernel - [RFC PATCH 0/1] perf tools: Add 'm' event modifier for counting

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Date:   Tue, 11 Jan 2022 17:20:47 +0300
From:   Nikita Shubin <nikita.shubin@...uefel.me>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Atish Patra <atishp@...osinc.com>, linux-riscv@...ts.infradead.org,
        linux@...ro.com, Nikita Shubin <n.shubin@...ro.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@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Kajol Jain <kjain@...ux.ibm.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Jin Yao <yao.jin@...ux.intel.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Ian Rogers <irogers@...gle.com>,
        John Garry <john.garry@...wei.com>,
        Riccardo Mancini <rickyman7@...il.com>,
        Song Liu <song@...nel.org>,
        Madhavan Srinivasan <maddy@...ux.ibm.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 0/1] perf tools: Add 'm' event modifier for counting

From: Nikita Shubin <n.shubin@...ro.com>

This patch is a proposal to add Machine Mode modifier that is currently 
available only for RISC-V for perf tool.

We don't currently have a level that is lower than kernel, so i don't 
see we can reuse something existing for this purpose.

The exclude_machine bit seems harmless to as no one will proccess it apart 
of riscv.

Patch depends on Atish Patra PMU series:
https://lwn.net/Articles/879905/
 + some modifications to pass execlude event to SBI PMU extension

Tested with qemu.

Nikita Shubin (1):
  perf tools: Add 'm' event modifier for counting machine

 include/uapi/linux/perf_event.h        |  3 ++-
 tools/include/uapi/linux/perf_event.h  |  3 ++-
 tools/perf/Documentation/perf-list.txt |  1 +
 tools/perf/tests/parse-events.c        | 18 ++++++++++++++++++
 tools/perf/util/evsel.c                |  4 +++-
 tools/perf/util/parse-events.c         | 18 +++++++++++++-----
 tools/perf/util/parse-events.l         |  2 +-
 7 files changed, 40 insertions(+), 9 deletions(-)

-- 
2.31.1