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Commit 23a1c257 authored by Feng Wu's avatar Feng Wu Committed by Paolo Bonzini
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KVM: Recover IRTE to remapped mode if the interrupt is not single-destination 



When the interrupt is not single destination any more, we need
to change back IRTE to remapped mode explicitly.

Signed-off-by: default avatarFeng Wu <feng.wu@intel.com>
Reviewed-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent b51012de

arch/x86/kvm/vmx.c

+14 −1
Original line number Diff line number Diff line
@@ -10764,8 +10764,21 @@ static int vmx_update_pi_irte(struct kvm *kvm, unsigned int host_irq, 
		 */



		kvm_set_msi_irq(e, &irq);

		if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu))

		if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu)) {

			/*

			 * Make sure the IRTE is in remapped mode if

			 * we don't handle it in posted mode.

			 */

			ret = irq_set_vcpu_affinity(host_irq, NULL);

			if (ret < 0) {

				printk(KERN_INFO

				   "failed to back to remapped mode, irq: %u\n",

				   host_irq);

				goto out;

			}



			continue;

		}



		vcpu_info.pi_desc_addr = __pa(vcpu_to_pi_desc(vcpu));

		vcpu_info.vector = irq.vector;