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authorShannon Zhao <shannon.zhao@linaro.org>2015-09-11 15:18:05 +0800
committerMarc Zyngier <marc.zyngier@arm.com>2016-02-29 18:34:21 +0000
commit5f0a714a2b63c25ffba5d832773f3ca4f0d02e21 (patch)
treed6120aa7da15b3ef5ae1ef7d0471eef506b0367e /virt
parent2aa36e9840d71710f06b3c29634f044fde8bcbe5 (diff)
downloadlinux-5f0a714a2b63c25ffba5d832773f3ca4f0d02e21.tar.gz
arm64: KVM: Free perf event of PMU when destroying vcpu
When KVM frees VCPU, it needs to free the perf_event of PMU. Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/pmu.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c
index 1dbbc2c51559..9b83857da195 100644
--- a/virt/kvm/arm/pmu.c
+++ b/virt/kvm/arm/pmu.c
@@ -101,6 +101,27 @@ void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu)
}
}
+/**
+ * kvm_pmu_vcpu_destroy - free perf event of PMU for cpu
+ * @vcpu: The vcpu pointer
+ *
+ */
+void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu)
+{
+ int i;
+ struct kvm_pmu *pmu = &vcpu->arch.pmu;
+
+ for (i = 0; i < ARMV8_PMU_MAX_COUNTERS; i++) {
+ struct kvm_pmc *pmc = &pmu->pmc[i];
+
+ if (pmc->perf_event) {
+ perf_event_disable(pmc->perf_event);
+ perf_event_release_kernel(pmc->perf_event);
+ pmc->perf_event = NULL;
+ }
+ }
+}
+
u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
{
u64 val = vcpu_sys_reg(vcpu, PMCR_EL0) >> ARMV8_PMU_PMCR_N_SHIFT;