From 23a1c2579b575b228a6c685dfe93f296d3d5e0e1 Mon Sep 17 00:00:00 2001 From: Feng Wu Date: Mon, 25 Jan 2016 16:53:32 +0800 Subject: [PATCH] KVM: Recover IRTE to remapped mode if the interrupt is not single-destination MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit When the interrupt is not single destination any more, we need to change back IRTE to remapped mode explicitly. Signed-off-by: Feng Wu Reviewed-by: Radim Krčmář Signed-off-by: Paolo Bonzini --- arch/x86/kvm/vmx.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index e2951b6edbbc..a4b4aa4cdc54 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; -- 2.11.0