KVM x86/pmu changes for 6.4. Hiding in the pile of selftests changes are a
a handful of small-but-important fixes.
Note, this superficially conflicts with the PRED_CMD/FLUSH_CMD changes
sitting in kvm/next due to "KVM: VMX: Refactor intel_pmu_{g,}set_msr() to
align with other helpers". The resolution I have been using when preparing
kvm-x86/next for linux-next is to replace a "return 0" with a "break".
The following changes since commit d8708b80fa0e6e21bc0c9e7276ad0bccef73b6e7:
KVM: Change return type of kvm_arch_vm_ioctl() to "int" (2023-03-16 10:18:07 -0400)
are available in the Git repository at:
https://github.com/kvm-x86/linux.git tags/kvm-x86-pmu-6.4
for you to fetch changes up to 457bd7af1a17182e7f1f97eeb5d9107f8699e99d:
KVM: selftests: Test the PMU event "Instructions retired" (2023-04-14 13:21:38 -0700)
----------------------------------------------------------------
KVM x86 PMU changes for 6.4:
- Disallow virtualizing legacy LBRs if architectural LBRs are available,
the two are mutually exclusive in hardware
- Disallow writes to immutable feature MSRs (notably PERF_CAPABILITIES)
after KVM_RUN, and overhaul the vmx_pmu_caps selftest to better
validate PERF_CAPABILITIES
- Apply PMU filters to emulated events and add test coverage to the
pmu_event_filter selftest
- Misc cleanups and fixes
----------------------------------------------------------------
Aaron Lewis (5):
KVM: x86/pmu: Prevent the PMU from counting disallowed events
KVM: selftests: Add a common helper for the PMU event filter guest code
KVM: selftests: Add helpers for PMC asserts in PMU event filter test
KVM: selftests: Print detailed info in PMU event filter asserts
KVM: selftests: Test the PMU event "Instructions retired"
Like Xu (4):
KVM: x86/pmu: Zero out pmu->all_valid_pmc_idx each time it's refreshed
KVM: x86/pmu: Rename pmc_is_enabled() to pmc_is_globally_enabled()
KVM: x86/pmu: Rewrite reprogram_counters() to improve performance
KVM: x86/pmu: Fix a typo in kvm_pmu_request_counter_reprogam()
Mathias Krause (1):
KVM: x86: Shrink struct kvm_pmu
Sean Christopherson (25):
KVM: x86/pmu: Disallow legacy LBRs if architectural LBRs are available
KVM: x86: Rename kvm_init_msr_list() to clarify it inits multiple lists
KVM: x86: Add a helper to query whether or not a vCPU has ever run
KVM: x86: Add macros to track first...last VMX feature MSRs
KVM: x86: Generate set of VMX feature MSRs using first/last definitions
KVM: selftests: Split PMU caps sub-tests to avoid writing MSR after KVM_RUN
KVM: x86: Disallow writes to immutable feature MSRs after KVM_RUN
KVM: x86/pmu: WARN and bug the VM if PMU is refreshed after vCPU has run
KVM: x86/pmu: Zero out LBR capabilities during PMU refresh
KVM: selftests: Move 0/initial value PERF_CAPS checks to dedicated sub-test
KVM: selftests: Assert that full-width PMC writes are supported if PDCM=1
KVM: selftests: Print out failing MSR and value in vcpu_set_msr()
KVM: selftests: Verify KVM preserves userspace writes to "durable" MSRs
KVM: selftests: Drop now-redundant checks on PERF_CAPABILITIES writes
KVM: selftests: Test all fungible features in PERF_CAPABILITIES
KVM: selftests: Test all immutable non-format bits in PERF_CAPABILITIES
KVM: selftests: Expand negative testing of guest writes to PERF_CAPABILITIES
KVM: selftests: Test post-KVM_RUN writes to PERF_CAPABILITIES
KVM: selftests: Drop "all done!" printf() from PERF_CAPABILITIES test
KVM: selftests: Refactor LBR_FMT test to avoid use of separate macro
KVM: selftests: Add negative testcase for PEBS format in PERF_CAPABILITIES
KVM: selftests: Verify LBRs are disabled if vPMU is disabled
KVM: VMX: Refactor intel_pmu_{g,}set_msr() to align with other helpers
KVM: selftests: Use error codes to signal errors in PMU event filter test
KVM: selftests: Copy full counter values from guest in PMU event filter test
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/kvm/cpuid.c | 2 +-
arch/x86/kvm/mmu/mmu.c | 2 +-
arch/x86/kvm/pmu.c | 21 +-
arch/x86/kvm/pmu.h | 2 +-
arch/x86/kvm/svm/pmu.c | 2 +-
arch/x86/kvm/svm/svm.c | 2 +-
arch/x86/kvm/vmx/pmu_intel.c | 135 ++++++-----
arch/x86/kvm/vmx/vmx.c | 16 +-
arch/x86/kvm/x86.c | 102 ++++++---
arch/x86/kvm/x86.h | 13 ++
.../selftests/kvm/include/x86_64/processor.h | 41 +++-
.../selftests/kvm/x86_64/pmu_event_filter_test.c | 252 ++++++++++++---------
.../selftests/kvm/x86_64/vmx_pmu_caps_test.c | 248 ++++++++++++++++----
14 files changed, 565 insertions(+), 275 deletions(-)
