kvm: x86: fix apic_base enable check

Commit e66d2ae7c67bd moved the assignment
vcpu->arch.apic_base = value above a condition with
(vcpu->arch.apic_base ^ value), causing that check
to always fail. Use old_value, vcpu->arch.apic_base's
old value, in the condition instead.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 1673940cf9c3..775702f649ca 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1355,7 +1355,7 @@ void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value)
         vcpu->arch.apic_base = value;
 
         /* update jump label if enable bit changes */
-        if ((vcpu->arch.apic_base ^ value) & MSR_IA32_APICBASE_ENABLE) {
+        if ((old_value ^ value) & MSR_IA32_APICBASE_ENABLE) {
                 if (value & MSR_IA32_APICBASE_ENABLE)
                         static_key_slow_dec_deferred(&apic_hw_disabled);
                 else