arm interconnect pmu drivers · Supported

Maintainers

• M Robin Murphy <robin.murphy@arm.com>

Paths

• F Documentation/admin-guide/perf/arm-cmn.rst
• F Documentation/admin-guide/perf/arm-ni.rst
• F Documentation/devicetree/bindings/perf/arm,cmn.yaml
• F Documentation/devicetree/bindings/perf/arm,ni.yaml
• F drivers/perf/arm-cmn.c
• F drivers/perf/arm-ni.c
• F tools/perf/pmu-events/arch/arm64/arm/cmn/

Last 30 days

Most active threads (last 7 days)

• WARM2d [PATCH v2 0/2] perf: Generic hotplug/cpumask for system PMUs
  2026-07-24 17:49 · 1 reply in 7d · Robin Murphy <robin.murphy@arm.com>
• COOLING4d [PATCH 0/2] perf: Generic hotplug/cpumask for system PMUs
  2026-07-22 17:24 · 1 reply in 7d · Robin Murphy <robin.murphy@arm.com>

Active reviewers (last 30 days)

• Ilkka Koskinen <hidden>
  2 attestations (2 Reviewed-by) · last on 2026-06-30
• Robin Murphy <robin.murphy@arm.com>
  1 attestation (1 Reviewed-by) · last on 2026-06-30

Recent patches

Most-recent 30 patches in this subsystem on linux-arm-kernel (capped at 30), ordered by date desc.

• WARM2d [PATCH v2 2/2] perf/arm-cmn: Switch to generic cpumask
  2026-07-24 · Robin Murphy <robin.murphy@arm.com>
• COOLING4d [PATCH 2/2] perf/arm-cmn: Switch to generic cpumask
  2026-07-22 · Robin Murphy <robin.murphy@arm.com>
• COLD17d [PATCH 5/5] perf/arm-cmn: Support CMN S3 r2
  2026-06-30 · Robin Murphy <robin.murphy@arm.com>
• COLD17d [PATCH 4/5] perf/arm-cmn: Add new filters
  2026-06-30 · Robin Murphy <robin.murphy@arm.com>
• COLD17d [PATCH 2/5] perf/arm-cmn: Refactor event filter programming
  2026-06-30 · Robin Murphy <robin.murphy@arm.com>
• COLD17d [PATCH 3/5] perf/arm-cmn: Refactor event filter data
  2026-06-30 · Robin Murphy <robin.murphy@arm.com>
• COLD17d [PATCH 1/5] perf/arm-cmn: Rename filter variables for clarity
  2026-06-30 · Robin Murphy <robin.murphy@arm.com>
• COOLING4d REVIEWED: 7 (6M) [PATCH v6 2/2] perf/arm-cmn: Add workarounds for CMN-S3 on Graviton5
  2026-06-30 · Robin Murphy <robin.murphy@arm.com>
• COOLING4d REVIEWED: 1 (0M) [PATCH v6 1/2] perf/arm-cmn: Move DTM index data out of hw_perf_event
  2026-06-30 · Robin Murphy <robin.murphy@arm.com>
• COLD53d REVIEWED: 7 (6M) [PATCH v5 2/2] perf/arm-cmn: Add workarounds for CMN-S3 on Graviton5
  2026-06-03 · Aviv Bakal <hidden>
• COLD53d REVIEWED: 1 (0M) [PATCH v5 1/2] perf/arm-cmn: Move DTM index data out of hw_perf_event
  2026-06-03 · Aviv Bakal <hidden>
• COLD53d [PATCH v4 2/2] perf/arm-cmn: Add workarounds for CMN-S3 on Graviton5
  2026-05-31 · Aviv Bakal <hidden>
• COLD53d [PATCH v4 1/2] perf/arm-cmn: Move DTM index data out of hw_perf_event
  2026-05-31 · Aviv Bakal <hidden>
• COLD53d Re: [PATCH v3 1/2] perf/arm-cmn: Move struct arm_cmn_hw_event into struct hw_perf_event
  2026-05-29 · Robin Murphy <robin.murphy@arm.com>
• COLD52d [PATCH] perf/arm-cmn: Fix DVM node events
  2026-05-29 · Robin Murphy <robin.murphy@arm.com>
• COLD53d [PATCH v3 2/2] perf/arm-cmn: Add workarounds for CMN-S3 on Graviton5
  2026-05-24 · Aviv Bakal <hidden>
• COLD53d [PATCH v3 1/2] perf/arm-cmn: Move struct arm_cmn_hw_event into struct hw_perf_event
  2026-05-24 · Aviv Bakal <hidden>
• COLD53d [PATCH v2] perf/arm-cmn: Add workarounds for CMN-S3 on Graviton5
  2026-05-04 · Aviv Bakal <hidden>
• COLD53d [PATCH] perf/arm-cmn: Add workarounds for CMN-S3 on Graviton5
  2026-05-03 · Aviv Bakal <hidden>
• STALE122d [PATCH] perf/arm-cmn: Fix incorrect error check for devm_ioremap()
  2026-03-26 · Chen Ni <hidden>
• STALE122d [PATCH] perf/arm-cmn: Fix resource_size_t printk specifier in arm_cmn_init_dtc()
  2026-03-26 · Nathan Chancellor <nathan@kernel.org>
• DORMANTno replies REVIEWED: 1 (0M) FAILED: Patch "perf/arm-cmn: Reject unsupported hardware configurations" failed to apply to 6.1-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org>
• DORMANTno replies REVIEWED: 1 (0M) FAILED: Patch "perf/arm-cmn: Reject unsupported hardware configurations" failed to apply to 6.6-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org>
• DORMANTno replies REVIEWED: 1 (0M) FAILED: Patch "perf/arm-cmn: Reject unsupported hardware configurations" failed to apply to 6.12-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org>
• STALE124d [PATCH] perf/arm-cmn: Stop claiming entire iomem region
  2026-02-19 · Robin Murphy <robin.murphy@arm.com>
• STALE165d REVIEWED: 11 (10M) [PATCH AUTOSEL 6.19-6.1] perf/arm-cmn: Support CMN-600AE
  2026-02-11 · Sasha Levin <sashal@kernel.org>
• STALE173d REVIEWED: 1 (0M) [PATCH v2] perf/arm-cmn: Reject unsupported hardware configurations
  2026-02-03 · Robin Murphy <robin.murphy@arm.com>
• STALE177d [PATCH] perf/arm-cmn: Reject unsupported hardware configurations
  2026-01-29 · Robin Murphy <robin.murphy@arm.com>
• STALE181d [PATCH 2/2] dt-bindings/perf: Drop irqs for clock domains without a PMU instance
  2026-01-26 · Baisheng Gao <hidden>
• STALE181d [PATCH 1/2] perf/arm-ni: Don't crash in probing clock domains without a PMU instance
  2026-01-26 · Baisheng Gao <hidden>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• STALE173d REVIEWED: 1 (0M) [PATCH v2] perf/arm-cmn: Reject unsupported hardware configurations
  2026-02-03 · Robin Murphy <robin.murphy@arm.com> · 1 Reviewed-by
• STALE165d REVIEWED: 11 (10M) [PATCH AUTOSEL 6.19-6.1] perf/arm-cmn: Support CMN-600AE
  2026-02-11 · Sasha Levin <sashal@kernel.org> · 1 Reviewed-by, 1 Tested-by
• DORMANTno replies REVIEWED: 1 (0M) FAILED: Patch "perf/arm-cmn: Reject unsupported hardware configurations" failed to apply to 6.12-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org> · 1 Reviewed-by
• DORMANTno replies REVIEWED: 1 (0M) FAILED: Patch "perf/arm-cmn: Reject unsupported hardware configurations" failed to apply to 6.6-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org> · 1 Reviewed-by
• DORMANTno replies REVIEWED: 1 (0M) FAILED: Patch "perf/arm-cmn: Reject unsupported hardware configurations" failed to apply to 6.1-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org> · 1 Reviewed-by
• COLD53d REVIEWED: 7 (6M) [PATCH v5 2/2] perf/arm-cmn: Add workarounds for CMN-S3 on Graviton5
  2026-06-03 · Aviv Bakal <hidden> · 2 Reviewed-by
• COOLING4d REVIEWED: 7 (6M) [PATCH v6 2/2] perf/arm-cmn: Add workarounds for CMN-S3 on Graviton5
  2026-06-30 · Robin Murphy <robin.murphy@arm.com> · 2 Reviewed-by

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• COLD53d Re: [PATCH v3 1/2] perf/arm-cmn: Move struct arm_cmn_hw_event into struct hw_perf_event
  2026-05-29 · Robin Murphy <robin.murphy@arm.com>