diff options
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/pmu.c | 8 | ||||
| -rw-r--r-- | virt/kvm/async_pf.c | 13 |
2 files changed, 17 insertions, 4 deletions
diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c index 6e9c40eea208..69ccce308458 100644 --- a/virt/kvm/arm/pmu.c +++ b/virt/kvm/arm/pmu.c @@ -305,7 +305,7 @@ void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) continue; type = vcpu_sys_reg(vcpu, PMEVTYPER0_EL0 + i) & ARMV8_PMU_EVTYPE_EVENT; - if ((type == ARMV8_PMU_EVTYPE_EVENT_SW_INCR) + if ((type == ARMV8_PMUV3_PERFCTR_SW_INCR) && (enable & BIT(i))) { reg = vcpu_sys_reg(vcpu, PMEVCNTR0_EL0 + i) + 1; reg = lower_32_bits(reg); @@ -379,7 +379,8 @@ void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data, eventsel = data & ARMV8_PMU_EVTYPE_EVENT; /* Software increment event does't need to be backed by a perf event */ - if (eventsel == ARMV8_PMU_EVTYPE_EVENT_SW_INCR) + if (eventsel == ARMV8_PMUV3_PERFCTR_SW_INCR && + select_idx != ARMV8_PMU_CYCLE_IDX) return; memset(&attr, 0, sizeof(struct perf_event_attr)); @@ -391,7 +392,8 @@ void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data, attr.exclude_kernel = data & ARMV8_PMU_EXCLUDE_EL1 ? 1 : 0; attr.exclude_hv = 1; /* Don't count EL2 events */ attr.exclude_host = 1; /* Don't count host events */ - attr.config = eventsel; + attr.config = (select_idx == ARMV8_PMU_CYCLE_IDX) ? + ARMV8_PMUV3_PERFCTR_CPU_CYCLES : eventsel; counter = kvm_pmu_get_counter_value(vcpu, select_idx); /* The initial sample period (overflow count) of an event. */ diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c index 8035cc1eb955..efeceb0a222d 100644 --- a/virt/kvm/async_pf.c +++ b/virt/kvm/async_pf.c @@ -91,6 +91,7 @@ static void async_pf_execute(struct work_struct *work) spin_lock(&vcpu->async_pf.lock); list_add_tail(&apf->link, &vcpu->async_pf.done); + apf->vcpu = NULL; spin_unlock(&vcpu->async_pf.lock); /* @@ -113,6 +114,8 @@ static void async_pf_execute(struct work_struct *work) void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu) { + spin_lock(&vcpu->async_pf.lock); + /* cancel outstanding work queue item */ while (!list_empty(&vcpu->async_pf.queue)) { struct kvm_async_pf *work = @@ -120,6 +123,14 @@ void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu) typeof(*work), queue); list_del(&work->queue); + /* + * We know it's present in vcpu->async_pf.done, do + * nothing here. + */ + if (!work->vcpu) + continue; + + spin_unlock(&vcpu->async_pf.lock); #ifdef CONFIG_KVM_ASYNC_PF_SYNC flush_work(&work->work); #else @@ -129,9 +140,9 @@ void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu) kmem_cache_free(async_pf_cache, work); } #endif + spin_lock(&vcpu->async_pf.lock); } - spin_lock(&vcpu->async_pf.lock); while (!list_empty(&vcpu->async_pf.done)) { struct kvm_async_pf *work = list_first_entry(&vcpu->async_pf.done, |