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

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Message-ID: <ZUtdfkISdtWtJsV8@arm.com>
Date:   Wed, 8 Nov 2023 10:05:50 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     Ilkka Koskinen <ilkka@...amperecomputing.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>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf: arm_cspmu: Reject events meant for other PMUs

On Tue, Nov 07, 2023 at 02:12:58PM -0800, Ilkka Koskinen wrote:
> 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.

Yes, I'll send it for 6.7-rc1 (probably tomorrow).

-- 
Catalin