linux-kernel - Re: [PATCH v3 3/4] RISC-V: Added generic pmu-events mapfile

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Date:   Wed, 8 Jun 2022 11:45:53 +0100
From:   John Garry <john.garry@...wei.com>
To:     Nikita Shubin <nikita.shubin@...uefel.me>
CC:     Genevieve Chan <genevieve.chan@...rfivetech.com>,
        João Mário Domingos 
        <joao.mario@...nico.ulisboa.pt>,
        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@...nel.org>,
        "Namhyung Kim" <namhyung@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        "Palmer Dabbelt" <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:PERFORMANCE EVENTS SUBSYSTEM" 
        <linux-perf-users@...r.kernel.org>,
        "open list:RISC-V ARCHITECTURE" <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH v3 3/4] RISC-V: Added generic pmu-events mapfile

On 07/06/2022 14:16, Nikita Shubin wrote:
> From: João Mário Domingos <joao.mario@...nico.ulisboa.pt>
> 
> The pmu-events now supports custom events for RISC-V, plus the cycle,
> time and instret events were defined.
> 
> Signed-off-by: João Mário Domingos <joao.mario@...nico.ulisboa.pt>
> Tested-by: Nikita Shubin <n.shubin@...ro.com>
> ---
>   tools/perf/pmu-events/arch/riscv/mapfile.csv  | 14 +++++++++++++
>   .../pmu-events/arch/riscv/riscv-generic.json  | 20 +++++++++++++++++++
>   2 files changed, 34 insertions(+)
>   create mode 100644 tools/perf/pmu-events/arch/riscv/mapfile.csv
>   create mode 100644 tools/perf/pmu-events/arch/riscv/riscv-generic.json
> 
> diff --git a/tools/perf/pmu-events/arch/riscv/mapfile.csv b/tools/perf/pmu-events/arch/riscv/mapfile.csv
> new file mode 100644
> index 000000000000..4f2aa199d9cb
> --- /dev/null
> +++ b/tools/perf/pmu-events/arch/riscv/mapfile.csv
> @@ -0,0 +1,14 @@
> +# Format:
> +#	MIDR,Version,JSON/file/pathname,Type
> +#
> +# where
> +#	MIDR	Processor version

ARM, no?

> +#		Variant[23:20] and Revision [3:0] should be zero.
> +#	Version could be used to track version of JSON file
> +#		but currently unused.
> +#	JSON/file/pathname is the path to JSON file, relative
> +#		to tools/perf/pmu-events/arch/riscv/.
> +#	Type is core, uncore etc
> +#
> +#
> +#Family-model,Version,Filename,EventType
> diff --git a/tools/perf/pmu-events/arch/riscv/riscv-generic.json b/tools/perf/pmu-events/arch/riscv/riscv-generic.json
> new file mode 100644
> index 000000000000..013e50efad99
> --- /dev/null
> +++ b/tools/perf/pmu-events/arch/riscv/riscv-generic.json

where or how are these referenced?

> @@ -0,0 +1,20 @@
> +[
> +  {
> +    "PublicDescription": "CPU Cycles",
> +    "EventCode": "0x00",
> +    "EventName": "riscv_cycles",
> +    "BriefDescription": "CPU cycles RISC-V generic counter"
> +  },
> +  {
> +    "PublicDescription": "CPU Time",
> +      "EventCode": "0x01",
> +      "EventName": "riscv_time",
> +      "BriefDescription": "CPU time RISC-V generic counter"
> +  },
> +  {
> +    "PublicDescription": "CPU Instructions",
> +      "EventCode": "0x02",
> +      "EventName": "riscv_instret",
> +      "BriefDescription": "CPU retired instructions RISC-V generic counter"
> +  }
> +]
> \ No newline at end of file