diff options
Diffstat (limited to 'arch/x86/kvm/vmx/posted_intr.c')
| -rw-r--r-- | arch/x86/kvm/vmx/posted_intr.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx/posted_intr.c b/arch/x86/kvm/vmx/posted_intr.c index 07e5fcf5a5aa..237a1f40f939 100644 --- a/arch/x86/kvm/vmx/posted_intr.c +++ b/arch/x86/kvm/vmx/posted_intr.c @@ -177,11 +177,24 @@ static void pi_enable_wakeup_handler(struct kvm_vcpu *vcpu) local_irq_restore(flags); } +static bool vmx_needs_pi_wakeup(struct kvm_vcpu *vcpu) +{ + /* + * The default posted interrupt vector does nothing when + * invoked outside guest mode. Return whether a blocked vCPU + * can be the target of posted interrupts, as is the case when + * using either IPI virtualization or VT-d PI, so that the + * notification vector is switched to the one that calls + * back to the pi_wakeup_handler() function. + */ + return vmx_can_use_ipiv(vcpu) || vmx_can_use_vtd_pi(vcpu->kvm); +} + void vmx_vcpu_pi_put(struct kvm_vcpu *vcpu) { struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); - if (!vmx_can_use_vtd_pi(vcpu->kvm)) + if (!vmx_needs_pi_wakeup(vcpu)) return; if (kvm_vcpu_is_blocking(vcpu) && !vmx_interrupt_blocked(vcpu)) |