1 #include <linux/kvm_host.h>
3 #include <linux/hrtimer.h>
4 #include <asm/atomic.h>
7 static int __kvm_timer_fn(struct kvm_vcpu *vcpu, struct kvm_timer *ktimer)
10 wait_queue_head_t *q = &vcpu->wq;
13 * There is a race window between reading and incrementing, but we do
14 * not care about potentially loosing timer events in the !reinject
17 if (ktimer->reinject || !atomic_read(&ktimer->pending)) {
18 atomic_inc(&ktimer->pending);
19 /* FIXME: this code should not know anything about vcpus */
20 set_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests);
23 if (waitqueue_active(q))
24 wake_up_interruptible(q);
26 if (ktimer->t_ops->is_periodic(ktimer)) {
27 hrtimer_add_expires_ns(&ktimer->timer, ktimer->period);
34 enum hrtimer_restart kvm_timer_fn(struct hrtimer *data)
37 struct kvm_vcpu *vcpu;
38 struct kvm_timer *ktimer = container_of(data, struct kvm_timer, timer);
42 return HRTIMER_NORESTART;
44 restart_timer = __kvm_timer_fn(vcpu, ktimer);
46 return HRTIMER_RESTART;
48 return HRTIMER_NORESTART;