[PATCH v7 00/19] KVM: x86/pmu: selftests: Fixes and new tests

Sean Christopherson
2023-11-08T00:31:40Z

Round 7! Fix bugs where KVM incorrectly refuses to virtualize fixed
counters and events whose encodings match unsupported arch events, and add
a PMU counters selftest to verify

As an aside, my hope is that in the long term, we can build out the PMU
selftests and deprecate the PMU tests in KUT so that we have everything
in-kernel and in one spot.

v7:
- Drop patches that unnecessarily sanitized supported CPUID. [Jim]
- Purge the array of architectural event encodings. [Jim, Dapeng]
- Clean up pmu.h to remove useless macros, and make it easier to use the
new macros. [Jim]
- Port more of pmu_event_filter_test.c to pmu.h macros. [Jim, Jinrong]
- Clean up test comments and error messages. [Jim]
- Sanity check the value provided to vcpu_set_cpuid_property(). [Jim]

v6:
- https://lore.kernel.org/all/20231104000239.367005-1-seanjc@google.com
- Test LLC references/misses with CFLUSH{OPT}. [Jim]
- Make the tests play nice without PERF_CAPABILITIES. [Mingwei]
- Don't squash eventsels that happen to match an unsupported arch event. [Kan]
- Test PMC counters with forced emulation (don't ask how long it took me to
figure out how to read integer module params).

v5: https://lore.kernel.org/all/20231024002633.2540714-1-seanjc@google.com
v4: https://lore.kernel.org/all/20230911114347.85882-1-cloudliang@tencent.com
v3: https://lore.kernel.org/kvm/20230814115108.45741-1-cloudliang@tencent.com

Jinrong Liang (7):
KVM: selftests: Add vcpu_set_cpuid_property() to set properties
KVM: selftests: Add pmu.h and lib/pmu.c for common PMU assets
KVM: selftests: Test Intel PMU architectural events on gp counters
KVM: selftests: Test Intel PMU architectural events on fixed counters
KVM: selftests: Test consistency of CPUID with num of gp counters
KVM: selftests: Test consistency of CPUID with num of fixed counters
KVM: selftests: Add functional test for Intel's fixed PMU counters

Sean Christopherson (12):
KVM: x86/pmu: Always treat Fixed counters as available when supported
KVM: x86/pmu: Allow programming events that match unsupported arch
events
KVM: x86/pmu: Remove KVM's enumeration of Intel's architectural
encodings
KVM: x86/pmu: Setup fixed counters' eventsel during PMU initialization
KVM: selftests: Drop the "name" param from KVM_X86_PMU_FEATURE()
KVM: selftests: Extend {kvm,this}_pmu_has() to support fixed counters
KVM: selftests: Expand PMU counters test to verify LLC events
KVM: selftests: Add a helper to query if the PMU module param is
enabled
KVM: selftests: Add helpers to read integer module params
KVM: selftests: Query module param to detect FEP in MSR filtering test
KVM: selftests: Move KVM_FEP macro into common library header
KVM: selftests: Test PMC virtualization with forced emulation

arch/x86/include/asm/kvm-x86-pmu-ops.h | 1 -
arch/x86/kvm/pmu.c | 1 -
arch/x86/kvm/pmu.h | 1 -
arch/x86/kvm/svm/pmu.c | 6 -
arch/x86/kvm/vmx/pmu_intel.c | 107 +---
tools/testing/selftests/kvm/Makefile | 2 +
.../selftests/kvm/include/kvm_util_base.h | 4 +
tools/testing/selftests/kvm/include/pmu.h | 95 +++
.../selftests/kvm/include/x86_64/processor.h | 82 ++-
tools/testing/selftests/kvm/lib/kvm_util.c | 62 +-
tools/testing/selftests/kvm/lib/pmu.c | 31 +
.../selftests/kvm/lib/x86_64/processor.c | 15 +-
.../selftests/kvm/x86_64/pmu_counters_test.c | 568 ++++++++++++++++++
.../kvm/x86_64/pmu_event_filter_test.c | 143 ++---
.../smaller_maxphyaddr_emulation_test.c | 2 +-
.../kvm/x86_64/userspace_msr_exit_test.c | 29 +-
.../selftests/kvm/x86_64/vmx_pmu_caps_test.c | 2 +-
17 files changed, 912 insertions(+), 239 deletions(-)
create mode 100644 tools/testing/selftests/kvm/include/pmu.h
create mode 100644 tools/testing/selftests/kvm/lib/pmu.c
create mode 100644 tools/testing/selftests/kvm/x86_64/pmu_counters_test.c

base-commit: 45b890f7689eb0aba454fc5831d2d79763781677
--
2.42.0.869.gea05f2083d-goog