[PATCH v5 0/3] drivers/perf: hisi: Updates for HiSilicon uncore PMUs

[Yushan Wang]

This patchset adds support for the ITS PMU and a new version of MN PMU.

The ITS (Interrupt Translation Service) PMU counts the number and
latency of interrupts routed to the ITS by category (LPI/SGI/PPI), and
collects micro-op statistics for the ITS itself. It supports filtering
counters by a 32-bit interrupt id (int_id).

The new MN PMU version (HIP13) adds a cycles event, used for MN metric
computation.

Changes:

v5:
- Reworked the ITS PMU global INT_ID filter handling per Sashiko review.
  Implement a get_event_idx() override that returns -EAGAIN when a
  newcomer disagrees with the currently-scheduled events on the filter,
  so perf time-multiplexes them instead of running them together.
- Reset the global INT_ID filter to disabled at probe, so unfiltered
  events do not inherit a stale filter left by prior state.
- Dropped the now-unused struct hisi_its_pmu wrapper, filter_lock and
  event->destroy callback.
Link to v4: https://lore.kernel.org/all/20260724025238.3411328-1-wangyushan12@huawei.com/
Link to Sashiko review report: https://sashiko.dev/#/patchset/20260724025238.3411328-1-wangyushan12%40huawei.com

v4:
- Moved unnecessary cpuhp states for each PMU drivers to hisi_uncore_pmu
  framework as suggested by Robin.
Link to v3: https://lore.kernel.org/all/20260713125647.2958626-1-wangyushan12@huawei.com/
Link to Sashiko review report: https://sashiko.dev/#/patchset/20260713125647.2958626-1-wangyushan12%40huawei.com

v3:
- Added check_filter callback to refuse new filtered events when there
  are already filtered ones running as per Sashiko.
Link to v2: https://lore.kernel.org/all/20260612093812.1249049-1-wangyushan12@huawei.com/
Link to Sashiko review report: https://sashiko.dev/#/message/20260612093812.1249049-1-wangyushan12%40huawei.com

v2:
- Added int_en filter to tell if int_id is used, enabling filtering
  interrupt with 0 int_id per Sashiko.
- Changed event format width to align with register width per Sashiko.
Link to v1: https://lore.kernel.org/all/20260423152959.1458563-1-wangyushan12@huawei.com/
Link to Sashiko review report: https://sashiko.dev/#/patchset/20260423152959.1458563-1-wangyushan12%40huawei.com

Yifan Wu (1):
  drivers/perf: hisi: Add cycle event for HIP13 MN PMU

Yushan Wang (2):
  drivers/perf: hisi: Consolidate uncore PMU cpuhp states
  drivers/perf: hisi: Add support for uncore ITS PMU

 Documentation/admin-guide/perf/hisi-pmu.rst   |  16 +
 drivers/perf/hisilicon/Makefile               |   2 +-
 drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c  |  34 +-
 drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c |  34 +-
 drivers/perf/hisilicon/hisi_uncore_hha_pmu.c  |  34 +-
 drivers/perf/hisilicon/hisi_uncore_its_pmu.c  | 379 ++++++++++++++++++
 drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c  |  21 +-
 drivers/perf/hisilicon/hisi_uncore_mn_pmu.c   |  98 +++--
 drivers/perf/hisilicon/hisi_uncore_noc_pmu.c  |  35 +-
 drivers/perf/hisilicon/hisi_uncore_pa_pmu.c   |  34 +-
 drivers/perf/hisilicon/hisi_uncore_pmu.c      |  25 ++
 drivers/perf/hisilicon/hisi_uncore_pmu.h      |   2 +
 drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c |  34 +-
 drivers/perf/hisilicon/hisi_uncore_uc_pmu.c   |  36 +-
 include/linux/cpuhotplug.h                    |   6 -
 15 files changed, 519 insertions(+), 271 deletions(-)
 create mode 100644 drivers/perf/hisilicon/hisi_uncore_its_pmu.c

-- 
2.33.0