linux-kernel - Re: [PATCH v4 0/5] RISC-V: Create unique identification for SoC PMU

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Date:   Fri, 24 Jun 2022 10:05:34 -0700
From:   Atish Patra <atishp@...shpatra.org>
To:     Nikita Shubin <nikita.shubin@...uefel.me>
Cc:     Anup Patel <anup@...infault.org>,
        João Mário Domingos 
        <joao.mario@...nico.ulisboa.pt>, linux <linux@...ro.com>,
        Nikita Shubin <n.shubin@...ro.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        linux-perf-users@...r.kernel.org,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Mark Rutland <mark.rutland@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Will Deacon <will@...nel.org>
Subject: Re: [PATCH v4 0/5] RISC-V: Create unique identification for SoC PMU

On Fri, Jun 24, 2022 at 9:01 AM Nikita Shubin <nikita.shubin@...uefel.me> wrote:
>
> From: Nikita Shubin <n.shubin@...ro.com>
>
> This series aims to provide matching vendor SoC with corresponded JSON bindings.
>
> The ID string is proposed to be in form of MVENDORID-MARCHID-MIMPID, for example
> for Sifive Unmatched the corresponding string will be:
>
> 0x489-0x8000000000000007-0x[[:xdigit:]]+,v1,sifive/u74,core
>
> Where MIMPID can vary as all impl supported the same number of events, this might not
> be true for all future SoC however.
>
> Also added 3 counters which are standart for all RISC-V implementations and SBI firmware
> events prerry names, as any firmware that supports SBI PMU should also support firmare
> events.
>
> Link: https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/riscv-sbi.adoc
> Link: https://patchwork.kernel.org/project/linux-riscv/list/?series=648017
> ---
> v3->v4:
> - drop pmuid in riscv_pmu_sbi, we are using /proc/cpuinfo
> - rework util/header.c to use /proc/cpuinfo
> - add SBI firmware events
> - add firmware and std arch events to U74 pmu bindings
> - change U74 id string and description in mapfile.csv
> ---
> Nikita Shubin (5):
>   drivers/perf: riscv_pmu_sbi: perf format
>   perf tools riscv: Add support for get_cpuid_str function
>   perf arch events: riscv arch std event files
>   perf arch events: riscv sbi firmare std event files
>   perf vendor events riscv: add Sifive U74 JSON file
>
>  drivers/perf/riscv_pmu_sbi.c                  |  20 +++
>  tools/perf/arch/riscv/util/Build              |   1 +
>  tools/perf/arch/riscv/util/header.c           | 109 ++++++++++++++
>  tools/perf/pmu-events/arch/riscv/mapfile.csv  |  17 +++
>  .../pmu-events/arch/riscv/riscv-generic.json  |  20 +++
>  .../arch/riscv/riscv-sbi-firmware.json        | 134 ++++++++++++++++++
>  .../arch/riscv/sifive/u74/firmware.json       |  68 +++++++++
>  .../arch/riscv/sifive/u74/generic.json        |  11 ++
>  .../arch/riscv/sifive/u74/instructions.json   |  92 ++++++++++++
>  .../arch/riscv/sifive/u74/memory.json         |  32 +++++
>  .../arch/riscv/sifive/u74/microarch.json      |  57 ++++++++
>  11 files changed, 561 insertions(+)
>  create mode 100644 tools/perf/arch/riscv/util/header.c
>  create mode 100644 tools/perf/pmu-events/arch/riscv/mapfile.csv
>  create mode 100644 tools/perf/pmu-events/arch/riscv/riscv-generic.json
>  create mode 100644 tools/perf/pmu-events/arch/riscv/riscv-sbi-firmware.json
>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/u74/firmware.json
>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/u74/generic.json
>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/u74/instructions.json
>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/u74/memory.json
>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/u74/microarch.json
>
> --
> 2.35.1
>

Thanks Nikita for reworking on the patches. It is good to specify that
this series now depends
on Anup's patch[1] that adds the mvendorid/mimpid to the /proc/cpuinfo.

[1] https://lkml.org/lkml/2022/6/20/498

-- 
Regards,
Atish