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

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commit d2286ba7d5 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wanpeng Li
2020-07-31 11:12:19 +08:00
committed by Chris
parent 1c3fb4f8f1
commit 8def349d22
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/lapic.c
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@@ -1756,7 +1756,7 @@ 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;