From: Julian Stecklina Date: Mon, 16 Jan 2012 13:02:20 +0000 (+0100) Subject: KVM: Don't mistreat edge-triggered INIT IPI as INIT de-assert. (LAPIC) X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a52315e1d549dad80ff443151927226c11fd8c2b;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git KVM: Don't mistreat edge-triggered INIT IPI as INIT de-assert. (LAPIC) If the guest programs an IPI with level=0 (de-assert) and trig_mode=0 (edge), it is erroneously treated as INIT de-assert and ignored, but to quote the spec: "For this delivery mode [INIT de-assert], the level flag must be set to 0 and trigger mode flag to 1." Signed-off-by: Julian Stecklina Signed-off-by: Marcelo Tosatti Signed-off-by: Avi Kivity --- diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index cfdc6e0ef002..3ee1d83c695d 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -433,7 +433,7 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, break; case APIC_DM_INIT: - if (level) { + if (!trig_mode || level) { result = 1; vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; kvm_make_request(KVM_REQ_EVENT, vcpu);