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Commit 0669a510 authored by Radim Krčmář's avatar Radim Krčmář Committed by Paolo Bonzini
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KVM: x86: zero apic_arb_prio on reset 



BSP doesn't get INIT so its apic_arb_prio isn't zeroed after reboot.
BSP won't get lowest priority interrupts until other VCPUs get enough
interrupts to match their pre-reboot apic_arb_prio.

That behavior doesn't fit into KVM's round-robin-like interpretation of
lowest priority delivery ... userspace should KVM_SET_LAPIC on reset, so
just zero apic_arb_prio there.

Reported-by: default avatarYuki Shibuya <shibuya.yk@ncos.nec.co.jp>
Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent c75efa97

arch/x86/kvm/lapic.c

+2 −0
Original line number Diff line number Diff line
@@ -1918,6 +1918,8 @@ void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu, 
	kvm_make_request(KVM_REQ_EVENT, vcpu);

	if (ioapic_in_kernel(vcpu->kvm))

		kvm_rtc_eoi_tracking_restore_one(vcpu);



	vcpu->arch.apic_arb_prio = 0;

}



void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu)