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KVM: Recover IRTE to remapped mode if the interrupt is not single-destination

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

Signed-off-by: Feng Wu <feng.wu@intel.com>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Feng Wu 2016-01-25 16:53:32 +08:00 committed by Paolo Bonzini
parent b51012deb3
commit 23a1c2579b
1 changed files with 14 additions and 1 deletions
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15
arch/x86/kvm/vmx.c
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@ -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;