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| author | Shannon Zhao <shannon.zhao@linaro.org> | 2015-09-11 11:30:22 +0800 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-02-29 18:34:21 +0000 |
| commit | 2aa36e9840d71710f06b3c29634f044fde8bcbe5 (patch) | |
| tree | aa646883c34800a0e363cbbb9d14df78407d3e59 /virt | |
| parent | b02386eb7dac7555a208d81aef2a0e5c6f0f8085 (diff) | |
| download | linux-2aa36e9840d71710f06b3c29634f044fde8bcbe5.tar.bz2 | |
arm64: KVM: Reset PMU state when resetting vcpu
When resetting vcpu, it needs to reset the PMU state to initial status.
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 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c index 74e858c42ae1..1dbbc2c51559 100644 --- a/virt/kvm/arm/pmu.c +++ b/virt/kvm/arm/pmu.c @@ -84,6 +84,23 @@ static void kvm_pmu_stop_counter(struct kvm_vcpu *vcpu, struct kvm_pmc *pmc) } } +/** + * kvm_pmu_vcpu_reset - reset pmu state for cpu + * @vcpu: The vcpu pointer + * + */ +void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) +{ + int i; + struct kvm_pmu *pmu = &vcpu->arch.pmu; + + for (i = 0; i < ARMV8_PMU_MAX_COUNTERS; i++) { + kvm_pmu_stop_counter(vcpu, &pmu->pmc[i]); + pmu->pmc[i].idx = i; + pmu->pmc[i].bitmask = 0xffffffffUL; + } +} + u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu) { u64 val = vcpu_sys_reg(vcpu, PMCR_EL0) >> ARMV8_PMU_PMCR_N_SHIFT; |