summaryrefslogtreecommitdiff
path: root/virt/kvm/arm/pmu.c
diff options
context:
space:
mode:
Diffstat (limited to 'virt/kvm/arm/pmu.c')
-rw-r--r--virt/kvm/arm/pmu.c43
1 files changed, 15 insertions, 28 deletions
diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c
index fc8a723ff387..8a9c42366db7 100644
--- a/virt/kvm/arm/pmu.c
+++ b/virt/kvm/arm/pmu.c
@@ -203,11 +203,15 @@ static u64 kvm_pmu_overflow_status(struct kvm_vcpu *vcpu)
return reg;
}
-static void kvm_pmu_check_overflow(struct kvm_vcpu *vcpu)
+static void kvm_pmu_update_state(struct kvm_vcpu *vcpu)
{
struct kvm_pmu *pmu = &vcpu->arch.pmu;
- bool overflow = !!kvm_pmu_overflow_status(vcpu);
+ bool overflow;
+
+ if (!kvm_arm_pmu_v3_ready(vcpu))
+ return;
+ overflow = !!kvm_pmu_overflow_status(vcpu);
if (pmu->irq_level == overflow)
return;
@@ -215,33 +219,11 @@ static void kvm_pmu_check_overflow(struct kvm_vcpu *vcpu)
if (likely(irqchip_in_kernel(vcpu->kvm))) {
int ret = kvm_vgic_inject_irq(vcpu->kvm, vcpu->vcpu_id,
- pmu->irq_num, overflow,
- &vcpu->arch.pmu);
+ pmu->irq_num, overflow, pmu);
WARN_ON(ret);
}
}
-/**
- * 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)
-{
- if (val == 0)
- return;
-
- vcpu_sys_reg(vcpu, PMOVSSET_EL0) |= val;
- kvm_pmu_check_overflow(vcpu);
-}
-
-static void kvm_pmu_update_state(struct kvm_vcpu *vcpu)
-{
- if (!kvm_arm_pmu_v3_ready(vcpu))
- return;
- kvm_pmu_check_overflow(vcpu);
-}
-
bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
{
struct kvm_pmu *pmu = &vcpu->arch.pmu;
@@ -303,7 +285,7 @@ static inline struct kvm_vcpu *kvm_pmc_to_vcpu(struct kvm_pmc *pmc)
}
/**
- * When perf event overflows, call kvm_pmu_overflow_set to set overflow status.
+ * When the perf event overflows, set the overflow status and inform the vcpu.
*/
static void kvm_pmu_perf_overflow(struct perf_event *perf_event,
struct perf_sample_data *data,
@@ -313,7 +295,12 @@ static void kvm_pmu_perf_overflow(struct perf_event *perf_event,
struct kvm_vcpu *vcpu = kvm_pmc_to_vcpu(pmc);
int idx = pmc->idx;
- kvm_pmu_overflow_set(vcpu, BIT(idx));
+ vcpu_sys_reg(vcpu, PMOVSSET_EL0) |= BIT(idx);
+
+ if (kvm_pmu_overflow_status(vcpu)) {
+ kvm_make_request(KVM_REQ_IRQ_PENDING, vcpu);
+ kvm_vcpu_kick(vcpu);
+ }
}
/**
@@ -341,7 +328,7 @@ void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val)
reg = lower_32_bits(reg);
vcpu_sys_reg(vcpu, PMEVCNTR0_EL0 + i) = reg;
if (!reg)
- kvm_pmu_overflow_set(vcpu, BIT(i));
+ vcpu_sys_reg(vcpu, PMOVSSET_EL0) |= BIT(i);
}
}
}