KVM: x86: really disarm lapic timer when clearing TMICT

preemption timer only looks at tscdeadline and could inject already
disarmed timer.

Signed-off-by: Radim Krčmář <[email protected]>
Reviewed-by: Wanpeng Li <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 39c1ae11ce1d98c86d0fc798c2c7ec49781bae45..96ade848ae0b660c3fd534e5884ca58f2f277d2d 100644 (file)
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1489,8 +1489,10 @@ static bool set_target_expiration(struct kvm_lapic *apic)
        apic->lapic_timer.period = (u64)kvm_lapic_get_reg(apic, APIC_TMICT)
                * APIC_BUS_CYCLE_NS * apic->divide_count;
 
-       if (!apic->lapic_timer.period)
+       if (!apic->lapic_timer.period) {
+               apic->lapic_timer.tscdeadline = 0;
                return false;
+       }
 
        limit_periodic_timer_frequency(apic);