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Date:   Wed, 8 Jun 2022 16:51:14 +0100
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Subject: Re: [PATCH v3 3/4] RISC-V: Added generic pmu-events mapfile
To:     Nikita Shubin <nikita.shubin@maquefel.me>
CC:     Genevieve Chan <genevieve.chan@starfivetech.com>,
        =?UTF-8?B?Sm/Do28gTcOhcmlvIERvbWluZ29z?= 
        <joao.mario@tecnico.ulisboa.pt>,
        Nikita Shubin <n.shubin@yadro.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        "Namhyung Kim" <namhyung@kernel.org>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        "Palmer Dabbelt" <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        <linux-kernel@vger.kernel.org>, <linux-perf-users@vger.kernel.org>,
        <linux-riscv@lists.infradead.org>,
        Atish Patra <atishp@atishpatra.org>
References: <20220607131648.29439-1-nikita.shubin@maquefel.me>
 <20220607131648.29439-4-nikita.shubin@maquefel.me>
 <9e981523-6032-fd24-08f9-0ef771cd1c2e@huawei.com>
 <20220608174107.7b94e545@redslave.neermore.group>
From:   John Garry <john.garry@huawei.com>
In-Reply-To: <20220608174107.7b94e545@redslave.neermore.group>
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On 08/06/2022 15:41, Nikita Shubin wrote:
>>> mat:
>>> +#	MIDR,Version,JSON/file/pathname,Type
>>> +#
>>> +# where
>>> +#	MIDR	Processor version
>> ARM, no?

I'm just saying that MIDR is for ARM, so please ensure that this term is 
correct for riscv

> I've messed with --cc-cmd badly and didn't include every one in cover
> letter, sorry for that, attaching link to cover letter:
> 
> https://lore.kernel.org/all/20220607131648.29439-1-nikita.shubin@maquefel.me/
> 
> They are ARM inspired indeed.
> 
> 
>>> +#		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?
> Currently they are not referenced in this version of series at all,

ok, right, so a general kernel policy is not to include code which is 
not referenced.

> their purpose is to be used like "ArchStdEvent".
> 
> Through any RISCV implementation should have at least these 3 events.

Thanks,
John