linux-kernel - Re: [PATCH 00/20] perf vendors events arm64: Multiple Arm CPUs

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Date:   Wed, 18 May 2022 09:15:21 +0100
From:   John Garry <john.garry@...wei.com>
To:     Robin Murphy <robin.murphy@....com>,
        Nick Forrington <nick.forrington@....com>,
        <linux-kernel@...r.kernel.org>, <linux-perf-users@...r.kernel.org>,
        <acme@...nel.org>
CC:     Will Deacon <will@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        "Namhyung Kim" <namhyung@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        James Clark <james.clark@....com>,
        Andrew Kilroy <andrew.kilroy@....com>
Subject: Re: [PATCH 00/20] perf vendors events arm64: Multiple Arm CPUs

On 17/05/2022 15:32, Robin Murphy wrote:
> 
> On 2022-05-10 11:47, Nick Forrington wrote:
>> Add Performance Monitoring Unit event data for the Arm CPUs listed
>> below.
>>
>> Changesets are dependent due to incremental updates to the common events
>> file and mapfile.csv.
>>
>> Data is sourced from https://github.com/ARM-software/data
>>
>> Nick Forrington (20):
>>    perf vendors events arm64: Arm Cortex-A5
>>    perf vendors events arm64: Arm Cortex-A7
>>    perf vendors events arm64: Arm Cortex-A8
>>    perf vendors events arm64: Arm Cortex-A9
>>    perf vendors events arm64: Arm Cortex-A15
>>    perf vendors events arm64: Arm Cortex-A17
>>    perf vendors events arm64: Arm Cortex-A32
> 
> Obligatory question over anything relating to the above CPUs being in an 
> "arch/arm64" directory... ;)

If we were to add to arm32/arm then the common event numbers and maybe 
other JSONs in future would need to be duplicated.

Would there be any reason to add to arm32/arm apart to from being 
strictly proper? Maybe if lots of other 32b support for other vendors 
came along then it could make sense (to separate them out).

thanks,
John