linux-kernel - Re: [PATCH v2 0/5] perf arm-spe: Introduce metadata version 2

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Message-ID: <61d9e213-d2ca-48c9-b176-03e7d01524c9@arm.com>
Date: Thu, 26 Sep 2024 17:20:49 +0100
From: Leo Yan <leo.yan@....com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
 James Clark <james.clark@...aro.org>, Mike Leach <mike.leach@...aro.org>,
 Will Deacon <will@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
 Mark Rutland <mark.rutland@....com>, Jiri Olsa <jolsa@...nel.org>,
 Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
 "Liang, Kan" <kan.liang@...ux.intel.com>,
 linux-arm-kernel@...ts.infradead.org, linux-perf-users@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/5] perf arm-spe: Introduce metadata version 2

On 9/14/24 22:54, Leo Yan wrote:
> This patch series enhances Arm SPE metadata in the Perf file to a
> version 2 format and maintains backward compatibility for metadata v1.
> 
> The version 2 metadata contains a global structure with fields for
> metadata header version number, header size, CPU numbers. It also
> expands to store per-CPU metadata, which includes the CPU logical
> number in the kernel, MIDR, and capacity values associated with Arm SPE.
> 
> This patch set has been tested the perf to decode the Arm SPE metadata
> v1 and v2.
> 
> Changes from v1:
> - Dropped LDS bit exposing from Arm SPE driver (Will Deacon).
> - To simplify the change, this series did not include multiple AUX event
>    support.

Hi Arnaldo, Namhyung,

Gentle ping. There is a bit backlog for Arm SPE patches, so I would
like to bring up this series and the series [1] for the Arm SPE data
source refactoring (which is dependent on the current series).

Please kindly review and pick it up if it is fine for you.

Thanks,
Leo

[1] https://lore.kernel.org/linux-perf-users/20240914220901.756177-1-leo.yan@arm.com/


> Leo Yan (5):
>    perf arm-spe: Define metadata header version 2
>    perf arm-spe: Calculate meta data size
>    perf arm-spe: Save per CPU information in metadata
>    perf arm-spe: Support metadata version 2
>    perf arm-spe: Dump metadata with version 2
> 
>   tools/perf/arch/arm64/util/arm-spe.c | 106 ++++++++++++++++++-
>   tools/perf/util/arm-spe.c            | 151 +++++++++++++++++++++++++--
>   tools/perf/util/arm-spe.h            |  38 ++++++-
>   3 files changed, 281 insertions(+), 14 deletions(-)
>