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| author | Feng Wu <feng.wu@intel.com> | 2016-01-25 16:53:32 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-02-09 13:24:39 +0100 |
| commit | 23a1c2579b575b228a6c685dfe93f296d3d5e0e1 (patch) | |
| tree | f7d2cc2663160e37028015bab9db1b96997dc946 /arch/x86/kvm/vmx.c | |
| parent | b51012deb390528d89d426f328d84618683f5d73 (diff) | |
| download | lwn-23a1c2579b575b228a6c685dfe93f296d3d5e0e1.tar.gz lwn-23a1c2579b575b228a6c685dfe93f296d3d5e0e1.zip | |
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: Feng Wu <feng.wu@intel.com>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 15 |
1 files changed, 14 insertions, 1 deletions
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; |