linux-kernel - Re: [PATCH] perf: arm_cspmu: Reject events meant for other PMUs

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Message-ID: <f3661af2-7fdf-d828-ef88-5732a370c0c@os.amperecomputing.com>
Date:   Tue, 7 Nov 2023 14:12:58 -0800 (PST)
From:   Ilkka Koskinen <ilkka@...amperecomputing.com>
To:     Catalin Marinas <catalin.marinas@....com>
cc:     Besar Wicaksono <bwicaksono@...dia.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Robin Murphy <robin.murphy@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Raag Jadav <raag.jadav@...el.com>,
        Ilkka Koskinen <ilkka@...amperecomputing.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf: arm_cspmu: Reject events meant for other PMUs


Hi Catalin,

On Tue, 7 Nov 2023, Catalin Marinas wrote:
> On Thu, 02 Nov 2023 17:16:54 -0700, Ilkka Koskinen wrote:
>> Coresight PMU driver didn't reject events meant for other PMUs.
>> This caused some of the Core PMU events disappearing from
>> the output of "perf list". In addition, trying to run e.g.
>>
>>      $ perf stat -e r2 sleep 1
>>
>> made Coresight PMU driver to handle the event instead of letting
>> Core PMU driver to deal with it.
>>
>> [...]
>
> Applied to arm64 (for-next/core), thanks!

Just wanted to ask if you are planning to submit this patch for 6.7-rcX as 
a fix? We have found out that one can even crash AmpereOne by running
"perf stat -C 1 sleep 1" without the patch.

Cheers, Ilkka

>
> [1/1] perf: arm_cspmu: Reject events meant for other PMUs
>      https://git.kernel.org/arm64/c/15c7ef7341a2
>
> -- 
> Catalin
>
>