linux-kernel - Re: [PATCH v3 06/10] perf: Add perf_event

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Message-ID: <CAP-5=fVZjqapNHhZ_Gro39JmJ-57nEun-SQhM_rd=MkQbx3GLA@mail.gmail.com>
Date: Mon, 30 Jun 2025 08:35:20 -0700
From: Ian Rogers <irogers@...gle.com>
To: James Clark <james.clark@...aro.org>
Cc: Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, Jonathan Corbet <corbet@....net>, Marc Zyngier <maz@...nel.org>, 
	Oliver Upton <oliver.upton@...ux.dev>, Joey Gouly <joey.gouly@....com>, 
	Suzuki K Poulose <suzuki.poulose@....com>, Zenghui Yu <yuzenghui@...wei.com>, 
	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Adrian Hunter <adrian.hunter@...el.com>, leo.yan@....com, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org, linux-doc@...r.kernel.org, 
	kvmarm@...ts.linux.dev
Subject: Re: [PATCH v3 06/10] perf: Add perf_event_attr::config4

On Thu, Jun 5, 2025 at 3:50 AM James Clark <james.clark@...aro.org> wrote:
>
> Arm FEAT_SPE_FDS adds the ability to filter on the data source of a
> packet using 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 'config4' field.
>
> Reviewed-by: Leo Yan <leo.yan@....com>
> Tested-by: Leo Yan <leo.yan@....com>
> Signed-off-by: James Clark <james.clark@...aro.org>

Reviewed-by: Ian Rogers <irogers@...gle.com>

Thanks,
Ian

> ---
>  include/uapi/linux/perf_event.h | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
> index 78a362b80027..0d0ed85ad8cb 100644
> --- a/include/uapi/linux/perf_event.h
> +++ b/include/uapi/linux/perf_event.h
> @@ -382,6 +382,7 @@ enum perf_event_read_format {
>  #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 */
> +#define PERF_ATTR_SIZE_VER9                    144     /* add: config4 */
>
>  /*
>   * 'struct perf_event_attr' contains various attributes that define
> @@ -543,6 +544,7 @@ struct perf_event_attr {
>         __u64   sig_data;
>
>         __u64   config3; /* extension of config2 */
> +       __u64   config4; /* extension of config3 */
>  };
>
>  /*
>
> --
> 2.34.1
>