[0/4] kvm: x86/pmu: Introduce and test masked events

Message

Aaron Lewis May 23, 2022, 9:41 p.m. UTC

This series introduces the concept of masked events to the pmu event filter.
Masked events can help reduce the number of events needed in the events field
of a pmu_event_filter by allowing a more generic matching method to be used
for the unit mask when filtering guest events in the pmu.  With masked
events, if an eventsel should be restricted from the guest, instead of
having to add a new eventsel for every unit mask, one encoded event can be
added that matches all possible unit masks. 

Aaron Lewis (4):
  kvm: x86/pmu: Introduce masked events to the pmu event filter
  selftests: kvm/x86: Add flags when creating a pmu event filter
  selftests: kvm/x86: Add testing for masked events
  selftests: kvm/x86: Add testing for KVM_SET_PMU_EVENT_FILTER

 Documentation/virt/kvm/api.rst                |  46 +++++-
 arch/x86/include/uapi/asm/kvm.h               |   8 +
 arch/x86/kvm/pmu.c                            | 128 +++++++++++++--
 arch/x86/kvm/pmu.h                            |   1 +
 arch/x86/kvm/svm/pmu.c                        |  12 ++
 arch/x86/kvm/vmx/pmu_intel.c                  |  12 ++
 .../kvm/x86_64/pmu_event_filter_test.c        | 147 +++++++++++++++++-
 7 files changed, 332 insertions(+), 22 deletions(-)