diff options
| author | Avi Kivity <avi@qumranet.com> | 2008-07-02 06:28:55 (GMT) |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-10-15 08:15:13 (GMT) |
| commit | 668f612fa0d8d4120ec5dc0725d7e1ca3152a954 (patch) | |
| tree | b1daa43b36d544abe32f0bb787fc459c85a6f766 /arch/x86/kvm/vmx.c | |
| parent | cf393f75661f4b17451377b353833eb5502a9688 (diff) | |
| download | linux-668f612fa0d8d4120ec5dc0725d7e1ca3152a954.tar.xz | |
KVM: VMX: Move nmi injection failure processing to vm exit path
Instead of processing nmi injection failure in the vm entry path, move
it to the vm exit path (vm_complete_interrupts()). This separates nmi
injection from nmi post-processing, and moves the nmi state from the VT
state into vcpu state (new variable nmi_injected specifying an injection
in progress).
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 49 |
1 files changed, 32 insertions, 17 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 2adfacb..ce13b53 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -2151,7 +2151,6 @@ static void vmx_inject_nmi(struct kvm_vcpu *vcpu) { vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR); - vcpu->arch.nmi_pending = 0; } static void kvm_do_inject_irq(struct kvm_vcpu *vcpu) @@ -2820,8 +2819,11 @@ static void enable_intr_window(struct kvm_vcpu *vcpu) static void vmx_complete_interrupts(struct vcpu_vmx *vmx) { u32 exit_intr_info; + u32 idt_vectoring_info; bool unblock_nmi; u8 vector; + int type; + bool idtv_info_valid; exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); if (cpu_has_virtual_nmis()) { @@ -2836,18 +2838,34 @@ static void vmx_complete_interrupts(struct vcpu_vmx *vmx) vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, GUEST_INTR_STATE_NMI); } + + idt_vectoring_info = vmx->idt_vectoring_info; + idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK; + vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK; + type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK; + if (vmx->vcpu.arch.nmi_injected) { + /* + * SDM 3: 25.7.1.2 + * Clear bit "block by NMI" before VM entry if a NMI delivery + * faulted. + */ + if (idtv_info_valid && type == INTR_TYPE_NMI_INTR) + vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO, + GUEST_INTR_STATE_NMI); + else + vmx->vcpu.arch.nmi_injected = false; + } } static void vmx_intr_assist(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); - u32 idtv_info_field, intr_info_field, exit_intr_info_field; + u32 idtv_info_field, intr_info_field; int vector; update_tpr_threshold(vcpu); intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD); - exit_intr_info_field = vmcs_read32(VM_EXIT_INTR_INFO); idtv_info_field = vmx->idt_vectoring_info; if (intr_info_field & INTR_INFO_VALID_MASK) { if (idtv_info_field & INTR_INFO_VALID_MASK) { @@ -2871,17 +2889,6 @@ static void vmx_intr_assist(struct kvm_vcpu *vcpu) KVMTRACE_1D(REDELIVER_EVT, vcpu, idtv_info_field, handler); - /* - * SDM 3: 25.7.1.2 - * Clear bit "block by NMI" before VM entry if a NMI delivery - * faulted. - */ - if ((idtv_info_field & VECTORING_INFO_TYPE_MASK) - == INTR_TYPE_NMI_INTR && cpu_has_virtual_nmis()) - vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, - vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & - ~GUEST_INTR_STATE_NMI); - vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field & ~INTR_INFO_RESVD_BITS_MASK); vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, @@ -2894,9 +2901,17 @@ static void vmx_intr_assist(struct kvm_vcpu *vcpu) return; } if (cpu_has_virtual_nmis()) { - if (vcpu->arch.nmi_pending) { - if (vmx_nmi_enabled(vcpu)) - vmx_inject_nmi(vcpu); + if (vcpu->arch.nmi_pending && !vcpu->arch.nmi_injected) { + if (vmx_nmi_enabled(vcpu)) { + vcpu->arch.nmi_pending = false; + vcpu->arch.nmi_injected = true; + } else { + enable_intr_window(vcpu); + return; + } + } + if (vcpu->arch.nmi_injected) { + vmx_inject_nmi(vcpu); enable_intr_window(vcpu); return; } |