linux-kernel - Re: [PATCH] perf cs-etm: Bump minimum OpenCSD version to ensure a bugfix is present

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Date:   Thu, 23 Nov 2023 11:31:26 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     James Clark <james.clark@....com>,
        linux-perf-users@...r.kernel.org,
        John Garry <john.g.garry@...cle.com>,
        Will Deacon <will@...nel.org>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf cs-etm: Bump minimum OpenCSD version to ensure a
 bugfix is present

Em Sun, Sep 03, 2023 at 08:36:35PM -0700, Ian Rogers escreveu:
> On Fri, Sep 1, 2023 at 6:37 AM James Clark <james.clark@....com> wrote:
> >
> > Since commit d927ef5004ef ("perf cs-etm: Add exception level consistency
> > check"), the exception that was added to Perf will be triggered unless
> > the following bugfix from OpenCSD is present:
> >
> >  - _Version 1.2.1_:
> >   - __Bugfix__:
> >     ETM4x / ETE - output of context elements to client can in some
> >     circumstances be delayed until after subsequent atoms have been
> >     processed leading to incorrect memory decode access via the client
> >     callbacks. Fixed to flush context elements immediately they are
> >     committed.
> >
> > Rather than remove the assert and silently fail, just increase the
> > minimum version requirement to avoid hard to debug issues and
> > regressions.
> >
> > Signed-off-by: James Clark <james.clark@....com>
> 
> Reviewed-by: Ian Rogers <irogers@...gle.com>

Thanks, applied to perf-tools-next.

- Arnaldo