linux-kernel - Re: [PATCH V5 21/25] perf: Introduce PERF_TYPE_HARDWARE_PMU and PERF_TYPE_HW_CACHE

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Date:   Fri, 9 Apr 2021 17:51:56 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Liang, Kan" <kan.liang@...ux.intel.com>
Cc:     mingo@...nel.org, linux-kernel@...r.kernel.org, acme@...nel.org,
        tglx@...utronix.de, bp@...en8.de, namhyung@...nel.org,
        jolsa@...hat.com, ak@...ux.intel.com, yao.jin@...ux.intel.com,
        alexander.shishkin@...ux.intel.com, adrian.hunter@...el.com,
        ricardo.neri-calderon@...ux.intel.com,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH V5 21/25] perf: Introduce PERF_TYPE_HARDWARE_PMU and
 PERF_TYPE_HW_CACHE_PMU

On Fri, Apr 09, 2021 at 11:24:07AM -0400, Liang, Kan wrote:

> diff --git a/include/uapi/linux/perf_event.h
> b/include/uapi/linux/perf_event.h
> index ad15e40..7ec80ac9 100644
> --- a/include/uapi/linux/perf_event.h
> +++ b/include/uapi/linux/perf_event.h
> @@ -38,6 +38,20 @@ enum perf_type_id {
>  };
> 
>  /*
> + * attr.config layout for type PERF_TYPE_HARDWARE and PERF_TYPE_HW_CACHE
> + * PERF_TYPE_HARDWARE:			0xEE000000AA
> + *					AA: hardware event ID
> + *					EE: PMU type ID
> + * PERF_TYPE_HW_CACHE:			0xEE00DDCCBB
> + *					BB: hardware cache ID
> + *					CC: hardware cache op ID
> + *					DD: hardware cache op result ID
> + *					EE: PMU type ID

it's: 0xEEEEEEEE00DDCCBB and 0xEEEEEEEE000000AA