This patch set allows usermode to disable PMU virtualization on individual x86 VMs. When disabled, the PMU is not advertised to or accessible from the guest. v5: https://lore.kernel.org/kvm/20220123184541.993212-1-daviddunn@xxxxxxxxxx/ v5 -> v6 * resolve minor conflicts that were queued after v5 was reviewed v4 -> v5 * Remove automatic CPUID adjustment when PMU disabled [Like] * Update documentation and changelog to reflect above. * Update documentation to document arg[0] and return values. [Like]. David Dunn (3): KVM: x86: Provide per VM capability for disabling PMU virtualization KVM: selftests: Allow creation of selftest VM without vcpus KVM: selftests: Verify disabling PMU virtualization via KVM_CAP_CONFIG_PMU Documentation/virt/kvm/api.rst | 22 ++++++++++++ arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/svm/pmu.c | 2 +- arch/x86/kvm/vmx/pmu_intel.c | 2 +- arch/x86/kvm/x86.c | 12 +++++++ include/uapi/linux/kvm.h | 4 +++ tools/include/uapi/linux/kvm.h | 4 +++ .../selftests/kvm/include/kvm_util_base.h | 3 ++ tools/testing/selftests/kvm/lib/kvm_util.c | 35 +++++++++++++++---- .../kvm/x86_64/pmu_event_filter_test.c | 35 +++++++++++++++++++ 10 files changed, 112 insertions(+), 8 deletions(-) -- 2.35.0.263.gb82422642f-goog
