linux-kernel - Re: [PATCH 0/2] arm_pmu: fix fallout from context handling rewrite

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Date:   Thu, 16 Feb 2023 22:14:29 +0000
From:   Will Deacon <will@...nel.org>
To:     Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     catalin.marinas@....com, kernel-team@...roid.com,
        Will Deacon <will@...nel.org>, peterz@...radead.org,
        ravi.bangoria@....com, j@...nau.net, ecurtin@...hat.com,
        lina@...hilina.net, asahi@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] arm_pmu: fix fallout from context handling rewrite

On Thu, 16 Feb 2023 14:12:37 +0000, Mark Rutland wrote:
> Janne reports [1] that perf has been broken on Apple M1 as of commit:
> 
>   bd27568117664b8b ("perf: Rewrite core context handling")
> 
> This is due to changes to pmu::filter_match() and
> arm_pmu::filter_match(), which have been renamed and had their polarity
> inverted, but the conversion was inconsistent, and so in some cases we
> return the opposite result relative to what we had intended. This
> results in consistently losing events on Apple M1.
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/2] arm_pmu: fix event CPU filtering
      https://git.kernel.org/arm64/c/61d038627343
[2/2] arm64: perf: reject CHAIN events at creation time
      https://git.kernel.org/arm64/c/853e2dac25c1

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev