| Message ID | 1453712015-3989-2-git-send-email-feng.wu@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
2016-01-25 16:53+0800, Feng Wu: > 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 Kr?má? <rkrcmar@redhat.com> -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index e2951b6..a4b4aa4 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -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;
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> --- v4: - Don't need to Set SN before changing back to remapped mode arch/x86/kvm/vmx.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)