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Commit 86bbc1e6 authored by Radim Krčmář's avatar Radim Krčmář Committed by Paolo Bonzini
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KVM: x86: handle 0 write to TSC_DEADLINE MSR 



0 should disable the timer, but start_hv_timer will recognize it as an
expired timer instead.

Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
Reviewed-by: default avatarWanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 46bea48a

arch/x86/kvm/lapic.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -1549,6 +1549,9 @@ static bool start_hv_timer(struct kvm_lapic *apic) 
	if (!apic_lvtt_period(apic) && atomic_read(&ktimer->pending))

	if (!apic_lvtt_period(apic) && atomic_read(&ktimer->pending))

		return false;

		return false;





	if (!ktimer->tscdeadline)

		return false;



	r = kvm_x86_ops->set_hv_timer(apic->vcpu, ktimer->tscdeadline);

	r = kvm_x86_ops->set_hv_timer(apic->vcpu, ktimer->tscdeadline);

	if (r < 0)

	if (r < 0)

		return false;

		return false;