linux-kernel - Re: [PATCH v3 02/15] perf/x86/amd: Add IBS OP

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Date:   Thu, 29 Sep 2022 21:41:36 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Ravi Bangoria <ravi.bangoria@....com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>, Joe Mario <jmario@...hat.com>,
        Leo Yan <leo.yan@...aro.org>, alisaidi@...zon.com,
        Andi Kleen <ak@...ux.intel.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        dave.hansen@...ux.intel.com, "H. Peter Anvin" <hpa@...or.com>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>, x86@...nel.org,
        linux-perf-users <linux-perf-users@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Sandipan Das <sandipan.das@....com>, ananth.narayan@....com,
        Kim Phillips <kim.phillips@....com>, santosh.shukla@....com
Subject: Re: [PATCH v3 02/15] perf/x86/amd: Add IBS OP_DATA2 DataSrc bit definitions

Hi Ravi,

On Wed, Sep 28, 2022 at 2:59 AM Ravi Bangoria <ravi.bangoria@....com> wrote:
>
> IBS_OP_DATA2 DataSrc provides detail about location of the data
> being accessed from by load ops. Define macros for legacy and
> extended DataSrc values.
>
> Signed-off-by: Ravi Bangoria <ravi.bangoria@....com>
> ---
>  arch/x86/include/asm/amd-ibs.h | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/arch/x86/include/asm/amd-ibs.h b/arch/x86/include/asm/amd-ibs.h
> index f3eb098d63d4..cb2a5e113daa 100644
> --- a/arch/x86/include/asm/amd-ibs.h
> +++ b/arch/x86/include/asm/amd-ibs.h
> @@ -6,6 +6,22 @@
>
>  #include <asm/msr-index.h>
>
> +/* IBS_OP_DATA2 DataSrc */
> +#define IBS_DATA_SRC_LOC_CACHE                  2
> +#define IBS_DATA_SRC_DRAM                       3
> +#define IBS_DATA_SRC_REM_CACHE                  4
> +#define IBS_DATA_SRC_IO                                 7
> +
> +/* IBS_OP_DATA2 DataSrc Extension */
> +#define IBS_DATA_SRC_EXT_LOC_CACHE              1
> +#define IBS_DATA_SRC_EXT_NEAR_CCX_CACHE                 2
> +#define IBS_DATA_SRC_EXT_DRAM                   3
> +#define IBS_DATA_SRC_EXT_FAR_CCX_CACHE          5

Is 4 undefined intentionally?

Thanks,
Namhyung


> +#define IBS_DATA_SRC_EXT_PMEM                   6
> +#define IBS_DATA_SRC_EXT_IO                     7
> +#define IBS_DATA_SRC_EXT_EXT_MEM                8
> +#define IBS_DATA_SRC_EXT_PEER_AGENT_MEM                12
> +
>  /*
>   * IBS Hardware MSRs
>   */
> --
> 2.31.1
>