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authorLike Xu <like.xu@linux.intel.com>2021-02-01 13:10:37 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2021-02-04 05:27:26 -0500
commit9aa4f622460f9287e57804dbeb219bfef29f04a1 (patch)
tree90447070a2e7ebc199f4edbdd68e3991b3201263 /arch/x86/kvm/pmu.c
parente6209a3bef793e8fe29c873a7612023916eaa611 (diff)
downloadlinux-9aa4f622460f9287e57804dbeb219bfef29f04a1.tar.bz2
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>
Diffstat (limited to 'arch/x86/kvm/pmu.c')
-rw-r--r--arch/x86/kvm/pmu.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index 405890c723a1..136dc2f3c5d3 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -476,6 +476,9 @@ void kvm_pmu_cleanup(struct kvm_vcpu *vcpu)
pmc_stop_counter(pmc);
}
+ if (kvm_x86_ops.pmu_ops->cleanup)
+ kvm_x86_ops.pmu_ops->cleanup(vcpu);
+
bitmap_zero(pmu->pmc_in_use, X86_PMC_IDX_MAX);
}