KVM: Remove internal timer abstraction
kvm_timer_fn(), the sole inhabitant of timer.c, is only used by lapic.c. Move
it there to make it easier to hack on it.
struct kvm_timer is a thin wrapper around hrtimer, and only adds obfuscation.
Move near its two users (with different names) to prepare for simplification.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index ad7fff7..61ed32c 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1262,6 +1262,34 @@
.write = apic_mmio_write,
};
+static enum hrtimer_restart apic_timer_fn(struct hrtimer *data)
+{
+ struct kvm_timer *ktimer = container_of(data, struct kvm_timer, timer);
+ struct kvm_vcpu *vcpu = ktimer->vcpu;
+ wait_queue_head_t *q = &vcpu->wq;
+
+ /*
+ * There is a race window between reading and incrementing, but we do
+ * not care about potentially losing timer events in the !reinject
+ * case anyway. Note: KVM_REQ_PENDING_TIMER is implicitly checked
+ * in vcpu_enter_guest.
+ */
+ if (ktimer->reinject || !atomic_read(&ktimer->pending)) {
+ atomic_inc(&ktimer->pending);
+ /* FIXME: this code should not know anything about vcpus */
+ kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
+ }
+
+ if (waitqueue_active(q))
+ wake_up_interruptible(q);
+
+ if (ktimer->t_ops->is_periodic(ktimer)) {
+ hrtimer_add_expires_ns(&ktimer->timer, ktimer->period);
+ return HRTIMER_RESTART;
+ } else
+ return HRTIMER_NORESTART;
+}
+
int kvm_create_lapic(struct kvm_vcpu *vcpu)
{
struct kvm_lapic *apic;
@@ -1285,7 +1313,7 @@
hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC,
HRTIMER_MODE_ABS);
- apic->lapic_timer.timer.function = kvm_timer_fn;
+ apic->lapic_timer.timer.function = apic_timer_fn;
apic->lapic_timer.t_ops = &lapic_timer_ops;
apic->lapic_timer.kvm = vcpu->kvm;
apic->lapic_timer.vcpu = vcpu;
