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

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Message-ID: <9f90bfc1-3f83-8fc1-f109-114467d4e574@arm.com>
Date:   Fri, 5 Apr 2019 10:36:20 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     Florian Fainelli <f.fainelli@...il.com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     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>,
        Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH 0/2] arm64: perf: Expose Cortex-A53 micro architectural
 events

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?

Robin.

> 
> Thanks!
> 
> Florian Fainelli (2):
>    arm64: perf: Group common ARMv8 v3 PMU events in a macro
>    arm64: perf: Expose Cortex-A53 micro architectural events
> 
>   arch/arm64/kernel/perf_event.c | 241 ++++++++++++++++++++++++---------
>   1 file changed, 179 insertions(+), 62 deletions(-)
>