[PATCH 0/7] KVM: x86: Attempt to wrangle PEBS/PMU into submission

Sean Christopherson
2022-06-11T00:58:12Z

Attempt to fix the myriad PEBS/PMU issues in kvm/next. Ideally this would
have been code review feedback, but I missed that boat.

Lightly tested, and I haven't thought through the host_initiated stuff too
deeply, but KUT and selftests are happy.

Sean Christopherson (7):
KVM: x86: Give host userspace full control of MSR_IA32_MISC_ENABLES
KVM: VMX: Give host userspace full control of
MSR_IA32_PERF_CAPABILITIES
Revert "KVM: x86/pmu: Accept 0 for absent PMU MSRs when host-initiated
if !enable_pmu"
Revert "KVM: x86: always allow host-initiated writes to PMU MSRs"
KVM: VMX: Use vcpu_get_perf_capabilities() to get guest-visible value
KVM: x86: Ignore benign host accesses to "unsupported" PEBS and BTS
MSRs
KVM: x86: Ignore benign host writes to "unsupported" F15H_PERF_CTL
MSRs

arch/x86/kvm/pmu.c | 12 ++------
arch/x86/kvm/pmu.h | 4 +--
arch/x86/kvm/svm/pmu.c | 13 ++-------
arch/x86/kvm/vmx/pmu_intel.c | 43 +++++++++++-----------------
arch/x86/kvm/x86.c | 55 ++++++++++++++++++++++++------------
5 files changed, 59 insertions(+), 68 deletions(-)

base-commit: 0cfd9c71371d4c7f96212d20833c36953eccdb91
--
2.36.1.476.g0c4daa206d-goog