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Diffstat (limited to 'arch/x86/kvm/i8254.c')
-rw-r--r--arch/x86/kvm/i8254.c21
1 files changed, 19 insertions, 2 deletions
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 72bd275a9b5c..c13bb92d3157 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -201,6 +201,9 @@ static int __pit_timer_fn(struct kvm_kpit_state *ps)
if (!atomic_inc_and_test(&pt->pending))
set_bit(KVM_REQ_PENDING_TIMER, &vcpu0->requests);
+ if (!pt->reinject)
+ atomic_set(&pt->pending, 1);
+
if (vcpu0 && waitqueue_active(&vcpu0->wq))
wake_up_interruptible(&vcpu0->wq);
@@ -536,6 +539,16 @@ void kvm_pit_reset(struct kvm_pit *pit)
pit->pit_state.irq_ack = 1;
}
+static void pit_mask_notifer(struct kvm_irq_mask_notifier *kimn, bool mask)
+{
+ struct kvm_pit *pit = container_of(kimn, struct kvm_pit, mask_notifier);
+
+ if (!mask) {
+ atomic_set(&pit->pit_state.pit_timer.pending, 0);
+ pit->pit_state.irq_ack = 1;
+ }
+}
+
struct kvm_pit *kvm_create_pit(struct kvm *kvm)
{
struct kvm_pit *pit;
@@ -545,9 +558,7 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm)
if (!pit)
return NULL;
- mutex_lock(&kvm->lock);
pit->irq_source_id = kvm_request_irq_source_id(kvm);
- mutex_unlock(&kvm->lock);
if (pit->irq_source_id < 0) {
kfree(pit);
return NULL;
@@ -580,10 +591,14 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm)
pit_state->irq_ack_notifier.gsi = 0;
pit_state->irq_ack_notifier.irq_acked = kvm_pit_ack_irq;
kvm_register_irq_ack_notifier(kvm, &pit_state->irq_ack_notifier);
+ pit_state->pit_timer.reinject = true;
mutex_unlock(&pit->pit_state.lock);
kvm_pit_reset(pit);
+ pit->mask_notifier.func = pit_mask_notifer;
+ kvm_register_irq_mask_notifier(kvm, 0, &pit->mask_notifier);
+
return pit;
}
@@ -592,6 +607,8 @@ void kvm_free_pit(struct kvm *kvm)
struct hrtimer *timer;
if (kvm->arch.vpit) {
+ kvm_unregister_irq_mask_notifier(kvm, 0,
+ &kvm->arch.vpit->mask_notifier);
mutex_lock(&kvm->arch.vpit->pit_state.lock);
timer = &kvm->arch.vpit->pit_state.pit_timer.timer;
hrtimer_cancel(timer);