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Date:   Fri, 18 Nov 2022 16:49:45 +0000
From:   Will Deacon <will@kernel.org>
To:     Rob Herring <robh@kernel.org>
Cc:     Namhyung Kim <namhyung@kernel.org>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Jiri Olsa <jolsa@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Marc Zyngier <maz@kernel.org>,
        Oliver Upton <oliver.upton@linux.dev>,
        Ingo Molnar <mingo@redhat.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        James Morse <james.morse@arm.com>,
        Alexandru Elisei <alexandru.elisei@arm.com>,
        kvmarm@lists.linux.dev, linux-perf-users@vger.kernel.org,
        linux-kernel@vger.kernel.org, James Clark <james.clark@arm.com>,
        Mark Brown <broonie@kernel.org>,
        linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH v3 7/8] perf: Add perf_event_attr::config3
Message-ID: <20221118164943.GA4872@willie-the-truck>
References: <20220825-arm-spe-v8-7-v3-0-87682f78caac@kernel.org>
 <20220825-arm-spe-v8-7-v3-7-87682f78caac@kernel.org>
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On Fri, Nov 04, 2022 at 10:55:07AM -0500, Rob Herring wrote:
> 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.
> 
> Tested-by: James Clark <james.clark@arm.com>
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
> v3:
>  - No change
> v2:
>  - Drop tools/ side update
> ---
>  include/uapi/linux/perf_event.h | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
> index 85be78e0e7f6..b2b1d7b54097 100644
> --- a/include/uapi/linux/perf_event.h
> +++ b/include/uapi/linux/perf_event.h
> @@ -374,6 +374,7 @@ 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:
> @@ -515,6 +516,8 @@ struct perf_event_attr {
>  	 * truncated accordingly on 32 bit architectures.
>  	 */
>  	__u64	sig_data;
> +
> +	__u64	config3; /* extension of config2 */

I need an ack from the perf core maintainers before I can take this.

Will