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

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Message-ID: <20190405123618.GA10844@krava>
Date:   Fri, 5 Apr 2019 14:36:18 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Robin Murphy <robin.murphy@....com>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        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 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

jirka