KVM: VMX: Move interrupt post-processing to vmx_complete_interrupts()

Instead of looking at failed injections in the vm entry path, move
processing to the exit path in vmx_complete_interrupts().  This simplifes
the logic and removes any state that is hidden in vmx registers.

Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index ed4fe8e..e8fed9b 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1002,17 +1002,9 @@ static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
 
 static int vmx_get_irq(struct kvm_vcpu *vcpu)
 {
-       struct vcpu_vmx *vmx = to_vmx(vcpu);
-       u32 idtv_info_field;
-
-       idtv_info_field = vmx->idt_vectoring_info;
-       if (idtv_info_field & INTR_INFO_VALID_MASK) {
-               if (is_external_interrupt(idtv_info_field))
-                       return idtv_info_field & VECTORING_INFO_VECTOR_MASK;
-               else
-                       printk(KERN_DEBUG "pending exception: not handled yet\n");
-       }
-       return -1;
+       if (!vcpu->arch.interrupt.pending)
+               return -1;
+       return vcpu->arch.interrupt.nr;
 }
 
 static __init int cpu_has_kvm_support(void)
@@ -2293,7 +2285,7 @@ static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
                cr2 = vmcs_readl(EXIT_QUALIFICATION);
                KVMTRACE_3D(PAGE_FAULT, vcpu, error_code, (u32)cr2,
                            (u32)((u64)cr2 >> 32), handler);
-               if (vect_info & VECTORING_INFO_VALID_MASK)
+               if (vcpu->arch.interrupt.pending || vcpu->arch.exception.pending)
                        kvm_mmu_unprotect_page_virt(vcpu, cr2);
                return kvm_mmu_page_fault(vcpu, cr2, error_code);
        }
@@ -2864,51 +2856,20 @@ static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
                        kvm_queue_exception(&vmx->vcpu, vector);
                vmx->idt_vectoring_info = 0;
        }
+       kvm_clear_interrupt_queue(&vmx->vcpu);
+       if (idtv_info_valid && type == INTR_TYPE_EXT_INTR) {
+               kvm_queue_interrupt(&vmx->vcpu, vector);
+               vmx->idt_vectoring_info = 0;
+       }
 }
 
 static void vmx_intr_assist(struct kvm_vcpu *vcpu)
 {
-       struct vcpu_vmx *vmx = to_vmx(vcpu);
-       u32 idtv_info_field, intr_info_field;
-       int vector;
+       u32 intr_info_field;
 
        update_tpr_threshold(vcpu);
 
        intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD);
-       idtv_info_field = vmx->idt_vectoring_info;
-       if (intr_info_field & INTR_INFO_VALID_MASK) {
-               if (idtv_info_field & INTR_INFO_VALID_MASK) {
-                       /* TODO: fault when IDT_Vectoring */
-                       if (printk_ratelimit())
-                               printk(KERN_ERR "Fault when IDT_Vectoring\n");
-               }
-               enable_intr_window(vcpu);
-               return;
-       }
-       if (unlikely(idtv_info_field & INTR_INFO_VALID_MASK)) {
-               if ((idtv_info_field & VECTORING_INFO_TYPE_MASK)
-                   == INTR_TYPE_EXT_INTR
-                   && vcpu->arch.rmode.active) {
-                       u8 vect = idtv_info_field & VECTORING_INFO_VECTOR_MASK;
-
-                       vmx_inject_irq(vcpu, vect);
-                       enable_intr_window(vcpu);
-                       return;
-               }
-
-               KVMTRACE_1D(REDELIVER_EVT, vcpu, idtv_info_field, handler);
-
-               vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field
-                               & ~INTR_INFO_RESVD_BITS_MASK);
-               vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
-                               vmcs_read32(VM_EXIT_INSTRUCTION_LEN));
-
-               if (unlikely(idtv_info_field & INTR_INFO_DELIVER_CODE_MASK))
-                       vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE,
-                               vmcs_read32(IDT_VECTORING_ERROR_CODE));
-               enable_intr_window(vcpu);
-               return;
-       }
        if (cpu_has_virtual_nmis()) {
                if (vcpu->arch.nmi_pending && !vcpu->arch.nmi_injected) {
                        if (vmx_nmi_enabled(vcpu)) {
@@ -2925,14 +2886,16 @@ static void vmx_intr_assist(struct kvm_vcpu *vcpu)
                        return;
                }
        }
-       if (!kvm_cpu_has_interrupt(vcpu))
-               return;
-       if (vmx_irq_enabled(vcpu)) {
-               vector = kvm_cpu_get_interrupt(vcpu);
-               vmx_inject_irq(vcpu, vector);
-               kvm_timer_intr_post(vcpu, vector);
-       } else
-               enable_irq_window(vcpu);
+       if (!vcpu->arch.interrupt.pending && kvm_cpu_has_interrupt(vcpu)) {
+               if (vmx_irq_enabled(vcpu))
+                       kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu));
+               else
+                       enable_irq_window(vcpu);
+       }
+       if (vcpu->arch.interrupt.pending) {
+               vmx_inject_irq(vcpu, vcpu->arch.interrupt.nr);
+               kvm_timer_intr_post(vcpu, vcpu->arch.interrupt.nr);
+       }
 }
 
 /*