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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: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
hifive-unleashed-5.1
Radim Krčmář 2017-10-06 19:25:53 +02:00 committed by Paolo Bonzini
parent 46bea48ac2
commit 86bbc1e6d7
1 changed files with 3 additions and 0 deletions
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3
arch/x86/kvm/lapic.c
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@ -1549,6 +1549,9 @@ static bool start_hv_timer(struct kvm_lapic *apic)
if (!apic_lvtt_period(apic) && atomic_read(&ktimer->pending))
return false;
if (!ktimer->tscdeadline)
return false;
r = kvm_x86_ops->set_hv_timer(apic->vcpu, ktimer->tscdeadline);
if (r < 0)
return false;