KVM: LAPIC: Prevent setting the tscdeadline timer if the lapic is hw disabled

Prevent setting the tscdeadline timer if the lapic is hw disabled.

Fixes: bce87cce88 (KVM: x86: consolidate different ways to test for in-kernel LAPIC)
Cc: <stable@vger.kernel.org>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1596165141-28874-1-git-send-email-wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 5bf72fc86a8e9f2a348330d95b61aa044e3a5979..4ce2ddd26c0b735d7100a68059f3680f37303af4 100644 (file)
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2195,7 +2195,7 @@ void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data)
 {
        struct kvm_lapic *apic = vcpu->arch.apic;
 
-       if (!lapic_in_kernel(vcpu) || apic_lvtt_oneshot(apic) ||
+       if (!kvm_apic_present(vcpu) || apic_lvtt_oneshot(apic) ||
                        apic_lvtt_period(apic))
                return;