linux-kernel - Re: [PATCH 0/2] arm64: perf: Expose Cortex-A53 micro architectural events

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Message-ID: <7055181b-5587-8fc9-2a9b-80e0293e4489@gmail.com>
Date:   Fri, 5 Apr 2019 09:14:55 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Jiri Olsa <jolsa@...hat.com>, Robin Murphy <robin.murphy@....com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        "open list:PERFORMANCE EVENTS SUBSYSTEM" 
        <linux-kernel@...r.kernel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH 0/2] arm64: perf: Expose Cortex-A53 micro architectural
 events

On 4/5/19 5:36 AM, Jiri Olsa wrote:
> On Fri, Apr 05, 2019 at 10:36:20AM +0100, Robin Murphy wrote:
>> Hi Florian,
>>
>> On 05/04/2019 00:25, Florian Fainelli wrote:
>>> Hi all,
>>>
>>> This patch series adds support for the Cortex-A53 micro architectural
>>> events that I recently had to use for some debugging exercise.
>>>
>>> Events from 0xC0 - 0xD2 are exposed, others could easily be added later
>>> if we wanted to.
>>
>> As far as I'm aware (which admittedly is not all-the-way far) these events
>> should already be understood by userspace, per
>> tools/perf/pmu-events/arch/arm64/arm/cortex-a53/* - is there a specific
>> reason to need in-kernel definitions?
> 
> right, we store events in perf tools in json files, please
> check commits changelogs under tools/perf/pmu-events/arch

Whoops, indeed no reason for making them part of the kernel, I will
investigate why the build system did not copy those files and update
them as necessary, thanks both for your feedback.
-- 
Florian