Skip events which have been missed by the guest.
Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Index: kvm-new/arch/x86/kvm/timer.c
===================================================================
--- kvm-new.orig/arch/x86/kvm/timer.c
+++ kvm-new/arch/x86/kvm/timer.c
@@ -58,6 +58,21 @@ void kvm_timer_ack(struct kvm_timer *kti
ktimer->can_inject = true;
}
+static void no_reinject_adjust(struct kvm_timer *ktimer, ktime_t expire)
+{
+ u64 unacked_events, delta;
+ ktime_t now;
+
+ now = ktime_get();
+ delta = ktime_to_ns(ktime_sub(now, expire));
+ unacked_events = 0;
+
+ if (now.tv64 > expire.tv64)
+ unacked_events = div_u64(delta, ktimer->period);
+ if (unacked_events > 1)
+ ktimer->acked_events += unacked_events-1;
+}
+
static ktime_t periodic_timer_next_event(struct kvm_timer *ktimer)
{
ktime_t last_acked_event;
@@ -136,6 +151,8 @@ void kvm_inject_pending_timer_irqs(struc
ktimer->ops->inject(ktimer);
if (!ktimer->periodic)
list_del_init(&ktimer->vcpu_timer);
+ else if (unlikely(!ktimer->reinject))
+ no_reinject_adjust(ktimer, expire);
}
}
--
--
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