linux-kernel - Re: [PATCH v4 2/3] perf tools: Sync perf_event

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Date:   Fri, 14 Oct 2022 17:05:36 -0500
From:   Rob Herring <robh@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, Leo Yan <leo.yan@...aro.org>,
        James Clark <james.clark@....com>
Subject: Re: [PATCH v4 2/3] perf tools: Sync perf_event_attr::config3 addition

On Fri, Oct 14, 2022 at 4:51 PM Arnaldo Carvalho de Melo
<acme@...nel.org> wrote:
>
> Em Tue, Oct 04, 2022 at 02:12:36PM -0500, Rob Herring escreveu:
> > Arm SPEv1.2 adds another 64-bits of event filtering control. As the
> > existing perf_event_attr::configN fields are all used up for SPE PMU, an
> > additional field is needed. Add a new 'config3' field.
> >
> > Signed-off-by: Rob Herring <robh@...nel.org>
> > ---
> > This patch is dependent on the kernel side landing first.
> > ---
> >  include/uapi/linux/perf_event.h       | 3 +++
> >  tools/include/uapi/linux/perf_event.h | 3 +++
> >  2 files changed, 6 insertions(+)
> >
> > diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
> > index 03b370062741..b53f9b958235 100644
> > --- a/include/uapi/linux/perf_event.h
> > +++ b/include/uapi/linux/perf_event.h
> > @@ -333,6 +333,7 @@ enum perf_event_read_format {
> >  #define PERF_ATTR_SIZE_VER5  112     /* add: aux_watermark */
> >  #define PERF_ATTR_SIZE_VER6  120     /* add: aux_sample_size */
> >  #define PERF_ATTR_SIZE_VER7  128     /* add: sig_data */
> > +#define PERF_ATTR_SIZE_VER8  136     /* add: config3 */
> >
> >  /*
> >   * Hardware event_id to monitor via a performance monitoring event:
> > @@ -474,6 +475,8 @@ struct perf_event_attr {
> >        * truncated accordingly on 32 bit architectures.
> >        */
> >       __u64   sig_data;
> > +
> > +     __u64   config3; /* extension of config2 */
> >  };
> >
> >  /*
>
>
> I'm removing the above part, as this is for the kernel, not for tooling.

Oops, yes.

>
> Was this part submitted upstream? I couldn't find, so far, where it was
> submitted, can you please clarify?

I have to respin it after rc1. I'm waiting on patch 1 to be accepted first.

You should only take patch 1 (for 6.1/stable) as I've noted in the
patches. I sent the whole thing because Leo asked to see the whole
thing...

Rob