Knock wood, _this_ is the final of fixes and tests for PMU counters. New in v10 is a small refactor to treat FIXED as a value, not a flag, when emulating RDPMC. Everything else is the same as v9 (although rebased, but there were no conflicts). v10: - Collect review. [Dapeng] - Treat the FIXED type in RDPMC's ECX as a value, not a flag. [Jim] v9: - https://lore.kernel.org/all/20231202000417.922113-1-seanjc@xxxxxxxxxx - Collect reviews. [Dapeng, Kan] - Fix a 63:31 => 63:32 typo in a changelog. [Dapeng] - Actually check that forced emulation is enabled before trying to force emulation on RDPMC. [Jinrong] - Fix the aformentioned priority inversion issue. - Completely drop "support" for fast RDPMC, in quotes because KVM doesn't actually support RDPMC for non-architectural PMUs. I had left the code in v8 because I didn't fully grok what the early emulator check was doing, i.e. wasn't 100% confident it was dead code. v8: - https://lore.kernel.org/all/20231110021306.1269082-1-seanjc@xxxxxxxxxx - Collect reviews. [Jim, Dapeng, Kan] - Tweak names for the RDPMC flags in the selftests #defines. - Get the event selectors used to virtualize fixed straight from perf instead of hardcoding the (wrong) selectors in KVM. [Kan] - Rename an "eventsel" field to "event" for a patch that gets blasted away in the end anyways. [Jim] - Add patches to fix RDPMC emulation and to test the behavior on Intel. I spot tested on AMD and spent ~30 minutes trying to squeeze in the bare minimum AMD support, but the PMU implementations between Intel and AMD are juuuust different enough to make adding AMD support non- trivial, and this series is already way too big. v7: - https://lore.kernel.org/all/20231108003135.546002-1-seanjc@xxxxxxxxxx - 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@xxxxxxxxxx - 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@xxxxxxxxxx v4: https://lore.kernel.org/all/20230911114347.85882-1-cloudliang@xxxxxxxxxxx v3: https://lore.kernel.org/kvm/20230814115108.45741-1-cloudliang@xxxxxxxxxxx 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 (22): 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: x86/pmu: Get eventsel for fixed counters from perf KVM: x86/pmu: Don't ignore bits 31:30 for RDPMC index on AMD KVM: x86/pmu: Prioritize VMX interception over #GP on RDPMC due to bad index KVM: x86/pmu: Apply "fast" RDPMC only to Intel PMUs KVM: x86/pmu: Disallow "fast" RDPMC for architectural Intel PMUs KVM: x86/pmu: Treat "fixed" PMU type in RDPMC as index as a value, not flag KVM: x86/pmu: Explicitly check for RDPMC of unsupported Intel PMC types 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 KVM: selftests: Add a forced emulation variation of KVM_ASM_SAFE() KVM: selftests: Add helpers for safe and safe+forced RDMSR, RDPMC, and XGETBV KVM: selftests: Extend PMU counters test to validate RDPMC after WRMSR arch/x86/include/asm/kvm-x86-pmu-ops.h | 3 +- arch/x86/kvm/emulate.c | 2 +- arch/x86/kvm/kvm_emulate.h | 2 +- arch/x86/kvm/pmu.c | 20 +- arch/x86/kvm/pmu.h | 5 +- arch/x86/kvm/svm/pmu.c | 17 +- arch/x86/kvm/vmx/pmu_intel.c | 178 +++-- arch/x86/kvm/x86.c | 9 +- tools/testing/selftests/kvm/Makefile | 2 + .../selftests/kvm/include/kvm_util_base.h | 4 + tools/testing/selftests/kvm/include/pmu.h | 97 +++ .../selftests/kvm/include/x86_64/processor.h | 148 ++++- 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 | 617 ++++++++++++++++++ .../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 +- 20 files changed, 1097 insertions(+), 291 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: 1c6d984f523f67ecfad1083bb04c55d91977bb15 -- 2.43.0.472.g3155946c3a-goog
