diff options
Diffstat (limited to 'virt/kvm/arm/pmu.c')
| -rw-r--r-- | virt/kvm/arm/pmu.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c index 591a11d1bd13..023286101fef 100644 --- a/virt/kvm/arm/pmu.c +++ b/virt/kvm/arm/pmu.c @@ -149,6 +149,37 @@ void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) } } +static u64 kvm_pmu_overflow_status(struct kvm_vcpu *vcpu) +{ + u64 reg = 0; + + if ((vcpu_sys_reg(vcpu, PMCR_EL0) & ARMV8_PMU_PMCR_E)) + reg = vcpu_sys_reg(vcpu, PMOVSSET_EL0); + reg &= vcpu_sys_reg(vcpu, PMCNTENSET_EL0); + reg &= vcpu_sys_reg(vcpu, PMINTENSET_EL1); + reg &= kvm_pmu_valid_counter_mask(vcpu); + + return reg; +} + +/** + * kvm_pmu_overflow_set - set PMU overflow interrupt + * @vcpu: The vcpu pointer + * @val: the value guest writes to PMOVSSET register + */ +void kvm_pmu_overflow_set(struct kvm_vcpu *vcpu, u64 val) +{ + u64 reg; + + if (val == 0) + return; + + vcpu_sys_reg(vcpu, PMOVSSET_EL0) |= val; + reg = kvm_pmu_overflow_status(vcpu); + if (reg != 0) + kvm_vcpu_kick(vcpu); +} + static bool kvm_pmu_counter_is_enabled(struct kvm_vcpu *vcpu, u64 select_idx) { return (vcpu_sys_reg(vcpu, PMCR_EL0) & ARMV8_PMU_PMCR_E) && |