Re: [PATCH v10 0/5] perf: arm_spe: Armv8.8 SPE features

[James Clark]

On 20/11/2025 1:54 am, Namhyung Kim wrote:
> 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

The SPE driver part was blocked on Peter's ack for the config4 change. 
He's given it now so Will should be able to take the driver.

Thanks
James

> > ---
> > 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@xxxxxxxxxx
> >
> > 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@xxxxxxxxxx
> >
> > 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@xxxxxxxxxx
> >
> > 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@xxxxxxxxxx
> >
> > 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@xxxxxxxxxx
> >
> > 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@xxxxxxxxxx
> >
> > 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@xxxxxxxxxx
> >
> > 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@xxxxxxxxxx
> >
> > 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@xxxxxxxxxx
> >
> > ---
> > 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@xxxxxxxxxx>