[v2,09/13] KVM: x86: reset lapic base in kvm_lapic_reset

Commit Message

Radim Krčmář July 7, 2016, 5:15 p.m. UTC

LAPIC is reset in xAPIC mode and the surrounding code expects that.
KVM never resets after initialization.  This patch is just for sanity.

Reviewed-by: Paolo Bonzini <[e-mail]>
Signed-off-by: Radim Krčmář <[e-mail]>
---
 v2: r-b Paolo

 arch/x86/kvm/lapic.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Patch

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 0fce77fdbe91..3c2a8c113054 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1763,8 +1763,11 @@  void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event)
 	/* Stop the timer in case it's a reset to an active apic */
 	hrtimer_cancel(&apic->lapic_timer.timer);
 
-	if (!init_event)
+	if (!init_event) {
+		kvm_lapic_set_base(vcpu, APIC_DEFAULT_PHYS_BASE |
+		                         MSR_IA32_APICBASE_ENABLE);
 		kvm_apic_set_xapic_id(apic, vcpu->vcpu_id);
+	}
 	kvm_apic_set_version(apic->vcpu);
 
 	for (i = 0; i < KVM_APIC_LVT_NUM; i++)
@@ -1903,9 +1906,6 @@  int kvm_create_lapic(struct kvm_vcpu *vcpu)
 	 * thinking that APIC satet has changed.
 	 */
 	vcpu->arch.apic_base = MSR_IA32_APICBASE_ENABLE;
-	kvm_lapic_set_base(vcpu,
-			APIC_DEFAULT_PHYS_BASE | MSR_IA32_APICBASE_ENABLE);
-
 	static_key_slow_inc(&apic_sw_disabled.key); /* sw disabled at reset */
 	kvm_lapic_reset(vcpu, false);
 	kvm_iodevice_init(&apic->dev, &apic_mmio_ops);