tree 90447070a2e7ebc199f4edbdd68e3991b3201263
parent e6209a3bef793e8fe29c873a7612023916eaa611
author Like Xu <like.xu@linux.intel.com> 1612156237 +0800
committer Paolo Bonzini <pbonzini@redhat.com> 1612434446 -0500

KVM: vmx/pmu: Release guest LBR event via lazy release mechanism

The vPMU uses GUEST_LBR_IN_USE_IDX (bit 58) in 'pmu->pmc_in_use' to
indicate whether a guest LBR event is still needed by the vcpu. If the
vcpu no longer accesses LBR related registers within a scheduling time
slice, and the enable bit of LBR has been unset, vPMU will treat the
guest LBR event as a bland event of a vPMC counter and release it
as usual. Also, the pass-through state of LBR records msrs is cancelled.

Signed-off-by: Like Xu <like.xu@linux.intel.com>
Message-Id: <20210201051039.255478-10-like.xu@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>