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| author | Shannon Zhao <shannon.zhao@linaro.org> | 2015-09-11 15:18:05 +0800 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-02-29 18:34:21 +0000 |
| commit | 5f0a714a2b63c25ffba5d832773f3ca4f0d02e21 (patch) | |
| tree | d6120aa7da15b3ef5ae1ef7d0471eef506b0367e /virt | |
| parent | 2aa36e9840d71710f06b3c29634f044fde8bcbe5 (diff) | |
| download | lwn-5f0a714a2b63c25ffba5d832773f3ca4f0d02e21.tar.gz lwn-5f0a714a2b63c25ffba5d832773f3ca4f0d02e21.zip | |
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.c | 21 |
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; |