[PATCH v6 0/3] KVM: selftests: aarch64: Introduce pmu_event_filter_test

[Shaoqin Huang]

The test is inspired by the pmu_event_filter_test which implemented by x86. On
the arm64 platform, there is the same ability to set the pmu_event_filter
through the KVM_ARM_VCPU_PMU_V3_FILTER attribute. So add the test for arm64.

The series first create the helper function which can be used
for the vpmu related tests. Then, it implement the test.

Changelog:
----------
v5->v6:
  - Rebased to v6.9-rc1.
  - Collect RB.
  - Add multiple filter test.

v4->v5:
  - Rebased to v6.8-rc6.
  - Refactor the helper function, make it fine-grained and easy to be used.
  - Namimg improvements.
  - Use the kvm_device_attr_set() helper.
  - Make the test descriptor array readable and clean.
  - Delete the patch which moves the pmu related helper to vpmu.h.
  - Remove the kvm_supports_pmu_event_filter() function since nobody will run
  this on a old kernel.

v3->v4:
  - Rebased to the v6.8-rc2.

v2->v3:
  - Check the pmceid in guest code instead of pmu event count since different
  hardware may have different event count result, check pmceid makes it stable
  on different platform.                        [Eric]
  - Some typo fixed and commit message improved.

v1->v2:
  - Improve the commit message.                 [Eric]
  - Fix the bug in [enable|disable]_counter.    [Raghavendra & Marc]
  - Add the check if kvm has attr KVM_ARM_VCPU_PMU_V3_FILTER.
  - Add if host pmu support the test event throught pmceid0.
  - Split the test_invalid_filter() to another patch. [Eric]

v1: https://lore.kernel.org/all/20231123063750.2176250-1-shahuang@xxxxxxxxxx/
v2: https://lore.kernel.org/all/20231129072712.2667337-1-shahuang@xxxxxxxxxx/
v3: https://lore.kernel.org/all/20240116060129.55473-1-shahuang@xxxxxxxxxx/
v4: https://lore.kernel.org/all/20240202025659.5065-1-shahuang@xxxxxxxxxx/
v5: https://lore.kernel.org/all/20240229065625.114207-1-shahuang@xxxxxxxxxx/

Shaoqin Huang (3):
  KVM: selftests: aarch64: Add helper function for the vpmu vcpu
    creation
  KVM: selftests: aarch64: Introduce pmu_event_filter_test
  KVM: selftests: aarch64: Add invalid filter test in
    pmu_event_filter_test

 tools/testing/selftests/kvm/Makefile          |   1 +
 .../kvm/aarch64/pmu_event_filter_test.c       | 336 ++++++++++++++++++
 .../kvm/aarch64/vpmu_counter_access.c         |  33 +-
 .../selftests/kvm/include/aarch64/vpmu.h      |  28 ++
 4 files changed, 372 insertions(+), 26 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c
 create mode 100644 tools/testing/selftests/kvm/include/aarch64/vpmu.h

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2.40.1