linux-kernel - Re: [PATCH v10 0/5] perf: arm

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Message-ID: <aR503-f-ZrnWzZh2@google.com>
Date: Wed, 19 Nov 2025 17:54:39 -0800
From: Namhyung Kim <namhyung@...nel.org>
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>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>, Leo Yan <leo.yan@....com>,
	Anshuman Khandual <anshuman.khandual@....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 v10 0/5] perf: arm_spe: Armv8.8 SPE features

Hello,

On Tue, Nov 11, 2025 at 11:37:54AM +0000, James Clark wrote:
> Support SPE_FEAT_FDS data source filtering.

What's the state of this series?  I can merge the tools part (3, 4, 5)
once the kernel part lands somewhere.

Thanks,
Namhyung

> 
> ---
> Changes in v10:
> - Pick up Peter's ack
> - Slightly clarify commit message regarding the difference between the
>   data source filter and the data source
> - Link to v9: https://lore.kernel.org/r/20251029-james-perf-feat_spe_eft-v9-0-d22536b9cf94@linaro.org
> 
> Changes in v9:
> - Fix another typo in docs: s/data_src_filter/inv_data_src_filter/g
> - Drop already applied patches for other features. Only the data source
>   filtering patches remain.
> - Rebase on latest perf-tools-next
> - Link to v8: https://lore.kernel.org/r/20250901-james-perf-feat_spe_eft-v8-0-2e2738f24559@linaro.org
> 
> Changes in v8:
> - Define __spe_vers_imp before it's used
> - "disable traps to PMSDSFR" -> "disable traps of PMSDSFR to EL2"
> - Link to v7: https://lore.kernel.org/r/20250814-james-perf-feat_spe_eft-v7-0-6a743f7fa259@linaro.org
> 
> Changes in v7:
> - Fix typo in docs: s/data_src_filter/inv_data_src_filter/g
> - Pickup trailers
> - Link to v6: https://lore.kernel.org/r/20250808-james-perf-feat_spe_eft-v6-0-6daf498578c8@linaro.org
> 
> Changes in v6:
> - Rebase to resolve conflict with BRBE changes in el2_setup.h
> - Link to v5: https://lore.kernel.org/r/20250721-james-perf-feat_spe_eft-v5-0-a7bc533485a1@linaro.org
> 
> Changes in v5:
> - Forgot to pickup tags from v4
> - Forgot to drop test and review tags on v4 patches that were
>   significantly modified
> - Update commit message for data source filtering to mention inversion
> - Link to v4: https://lore.kernel.org/r/20250721-james-perf-feat_spe_eft-v4-0-0a527410f8fd@linaro.org
> 
> Changes in v4:
> - Rewrite "const u64 feat_spe_eft_bits" inline
> - Invert data source filter so that it's possible to exclude all data
>   sources without adding an additional 'enable filter' flag
> - Add a macro in el2_setup.h to check for an SPE version
> - Probe valid filter bits instead of hardcoding them
> - Take in Leo's commit to expose the filter bits as it depends on the
>   new filter probing
> - Link to v3: https://lore.kernel.org/r/20250605-james-perf-feat_spe_eft-v3-0-71b0c9f98093@linaro.org
> 
> Changes in v3:
> - Use PMSIDR_EL1_FDS instead of 1 << PMSIDR_EL1_FDS_SHIFT
> - Add VNCR offsets
> - Link to v2: https://lore.kernel.org/r/20250529-james-perf-feat_spe_eft-v2-0-a01a9baad06a@linaro.org
> 
> Changes in v2:
> - Fix detection of FEAT_SPE_FDS in el2_setup.h
> - Pickup Marc Z's sysreg change instead which matches the json
> - Restructure and expand docs changes
> - Link to v1: https://lore.kernel.org/r/20250506-james-perf-feat_spe_eft-v1-0-dd480e8e4851@linaro.org
> 
> ---
> James Clark (5):
>       perf: Add perf_event_attr::config4
>       perf: arm_spe: Add support for filtering on data source
>       tools headers UAPI: Sync linux/perf_event.h with the kernel sources
>       perf tools: Add support for perf_event_attr::config4
>       perf docs: arm-spe: Document new SPE filtering features
> 
>  drivers/perf/arm_spe_pmu.c                |  37 +++++++++++
>  include/uapi/linux/perf_event.h           |   2 +
>  tools/include/uapi/linux/perf_event.h     |   2 +
>  tools/perf/Documentation/perf-arm-spe.txt | 104 +++++++++++++++++++++++++++---
>  tools/perf/tests/parse-events.c           |  13 +++-
>  tools/perf/util/parse-events.c            |  11 ++++
>  tools/perf/util/parse-events.h            |   1 +
>  tools/perf/util/parse-events.l            |   1 +
>  tools/perf/util/pmu.c                     |   8 +++
>  tools/perf/util/pmu.h                     |   1 +
>  10 files changed, 170 insertions(+), 10 deletions(-)
> ---
> base-commit: 081006b7c8e19406dc6674c6b6d086764d415b5c
> change-id: 20250312-james-perf-feat_spe_eft-66cdf4d8fe99
> 
> Best regards,
> -- 
> James Clark <james.clark@...aro.org>
>