[PATCH v4 00/10] Refactor the common parts to the HiSilicon Uncore PMU core and cleanups

[Yicong Yang <yangyicong@huawei.com>]

From: Yicong Yang <yangyicong@hisilicon.com>

This series mainly contains the refactor of the HiSilicon Uncore PMU by
extracting the common parts from each drivers into the core:
- the retrieving of the PMU topology ID
- the common sysfs attributes like cpumask and identifier

In order to achieve this, we need to do below preparation:
- refactor the detection of associated CPUs for PMUs locates on a SICL
- maintain the topology information in a dedicated data structure
- provides a generic implementation of cpumask/identifier attributes

Besides also include below changes/cleanups in this patchset
- add one new sysfs attributes for better describing the topology information
  of the associated CPUs of the PMU.
- define a symbol namespace for HiSilicon Uncore PMUs to avoid pollute the
  common ones
- two minor nonfunctional cleanups of DDRC PMU

Change since v3:
- Split the associated_cpus refactor patches according to the functions, hope
  will be easier to review
- Drop the use of cpu_online_mask out of cpuhp
Link: https://lore.kernel.org/linux-arm-kernel/20241026072424.29887-1-yangyicong@huawei.com/

Change since v2:
- remove one redundant newline and add Jonathan's tag for Patch 1 and 5
Link: https://lore.kernel.org/linux-arm-kernel/20241022145305.47056-1-yangyicong@huawei.com/

Changes since v1:
Address Jonathan's comments and add tags for some patches
- Provide a generic cpumask/identifier attribute group
- refine the comments/commit as suggested
Link: https://lore.kernel.org/linux-arm-kernel/20241018095745.57057-1-yangyicong@huawei.com/

Junhao He (2):
  drivers/perf: hisi: Fix incorrect variable name "hha_pmu" in DDRC PMU
    driver
  drivers/perf: hisi: Delete redundant blank line of DDRC PMU

Yicong Yang (8):
  drivers/perf: hisi: Define a symbol namespace for HiSilicon Uncore
    PMUs
  drivers/perf: hisi: Don't update the associated_cpus on CPU offline
  drivers/perf: hisi: Migrate to one online CPU if no associated one
    online
  drivers/perf: hisi: Refactor the detection of associated CPUs
  drivers/perf: hisi: Extract topology information to a separate
    structure
  drivers/perf: hisi: Add a common function to retrieve topology from
    firmware
  drivers/perf: hisi: Provide a generic implementation of
    cpumask/identifier
  drivers/perf: hisi: Export associated CPUs of each PMU through sysfs

 Documentation/admin-guide/perf/hisi-pmu.rst   |   5 +-
 drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c  |  42 +----
 drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c |  61 ++-----
 drivers/perf/hisilicon/hisi_uncore_hha_pmu.c  |  48 ++----
 drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c  |  44 ++---
 drivers/perf/hisilicon/hisi_uncore_pa_pmu.c   |  53 ++----
 drivers/perf/hisilicon/hisi_uncore_pmu.c      | 160 +++++++++++++-----
 drivers/perf/hisilicon/hisi_uncore_pmu.h      |  49 +++++-
 drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c |  43 +----
 drivers/perf/hisilicon/hisi_uncore_uc_pmu.c   |  45 ++---
 10 files changed, 248 insertions(+), 302 deletions(-)

-- 
2.24.0