[PATCH v2] KVM: LAPIC: Advancing the timer expiration on guest initiated write

[Wanpeng Li]

From: Wanpeng Li <wanpengli@xxxxxxxxxxx>

Advancing the timer expiration should only be necessary on guest initiated 
writes. When we cancel the timer and clear .pending during state restore, 
clear expired_tscdeadline as well.

Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>
Signed-off-by: Wanpeng Li <wanpengli@xxxxxxxxxxx>
---
v1 -> v2:
 * update patch description

 arch/x86/kvm/lapic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 45d40bf..f2b6e79 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2595,6 +2595,7 @@ int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s)
 
 	apic_update_ppr(apic);
 	hrtimer_cancel(&apic->lapic_timer.timer);
+	apic->lapic_timer.expired_tscdeadline = 0;
 	apic_update_lvtt(apic);
 	apic_manage_nmi_watchdog(apic, kvm_lapic_get_reg(apic, APIC_LVT0));
 	update_divide_count(apic);
-- 
2.7.4