diff options
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 64 |
1 files changed, 63 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 8535519d0352..3a14d8a0ee46 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -375,6 +375,23 @@ struct pi_desc { u32 rsvd[7]; } __aligned(64); +static bool pi_test_and_set_on(struct pi_desc *pi_desc) +{ + return test_and_set_bit(POSTED_INTR_ON, + (unsigned long *)&pi_desc->control); +} + +static bool pi_test_and_clear_on(struct pi_desc *pi_desc) +{ + return test_and_clear_bit(POSTED_INTR_ON, + (unsigned long *)&pi_desc->control); +} + +static int pi_test_and_set_pir(int vector, struct pi_desc *pi_desc) +{ + return test_and_set_bit(vector, (unsigned long *)pi_desc->pir); +} + struct vcpu_vmx { struct kvm_vcpu vcpu; unsigned long host_rsp; @@ -639,6 +656,7 @@ static void vmx_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); static bool guest_state_valid(struct kvm_vcpu *vcpu); static u32 vmx_segment_access_rights(struct kvm_segment *var); +static void vmx_sync_pir_to_irr_dummy(struct kvm_vcpu *vcpu); static DEFINE_PER_CPU(struct vmcs *, vmxarea); static DEFINE_PER_CPU(struct vmcs *, current_vmcs); @@ -2846,8 +2864,11 @@ static __init int hardware_setup(void) if (enable_apicv) kvm_x86_ops->update_cr8_intercept = NULL; - else + else { kvm_x86_ops->hwapic_irr_update = NULL; + kvm_x86_ops->deliver_posted_interrupt = NULL; + kvm_x86_ops->sync_pir_to_irr = vmx_sync_pir_to_irr_dummy; + } if (nested) nested_vmx_setup_ctls_msrs(); @@ -3909,6 +3930,45 @@ static int vmx_vm_has_apicv(struct kvm *kvm) } /* + * Send interrupt to vcpu via posted interrupt way. + * 1. If target vcpu is running(non-root mode), send posted interrupt + * notification to vcpu and hardware will sync PIR to vIRR atomically. + * 2. If target vcpu isn't running(root mode), kick it to pick up the + * interrupt from PIR in next vmentry. + */ +static void vmx_deliver_posted_interrupt(struct kvm_vcpu *vcpu, int vector) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + int r; + + if (pi_test_and_set_pir(vector, &vmx->pi_desc)) + return; + + r = pi_test_and_set_on(&vmx->pi_desc); + kvm_make_request(KVM_REQ_EVENT, vcpu); + if (!r && (vcpu->mode == IN_GUEST_MODE)) + apic->send_IPI_mask(get_cpu_mask(vcpu->cpu), + POSTED_INTR_VECTOR); + else + kvm_vcpu_kick(vcpu); +} + +static void vmx_sync_pir_to_irr(struct kvm_vcpu *vcpu) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + + if (!pi_test_and_clear_on(&vmx->pi_desc)) + return; + + kvm_apic_update_irr(vcpu, vmx->pi_desc.pir); +} + +static void vmx_sync_pir_to_irr_dummy(struct kvm_vcpu *vcpu) +{ + return; +} + +/* * Set up the vmcs's constant host-state fields, i.e., host-state fields that * will not change in the lifetime of the guest. * Note that host-state that does change is set elsewhere. E.g., host-state @@ -7784,6 +7844,8 @@ static struct kvm_x86_ops vmx_x86_ops = { .load_eoi_exitmap = vmx_load_eoi_exitmap, .hwapic_irr_update = vmx_hwapic_irr_update, .hwapic_isr_update = vmx_hwapic_isr_update, + .sync_pir_to_irr = vmx_sync_pir_to_irr, + .deliver_posted_interrupt = vmx_deliver_posted_interrupt, .set_tss_addr = vmx_set_tss_addr, .get_tdp_level = get_ept_level, |