3 files changed, 9 insertions, 54 deletions

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 487e1dcdce33..6259d7467648 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2498,15 +2498,13 @@ static void do_interrupt_requests(struct kvm_vcpu *vcpu,
         }
         if (vcpu->arch.nmi_injected) {
                 vmx_inject_nmi(vcpu);
-                if (vcpu->arch.nmi_pending || kvm_run->request_nmi_window)
+                if (vcpu->arch.nmi_pending)
                         enable_nmi_window(vcpu);
                 else if (vcpu->arch.irq_summary
                          || kvm_run->request_interrupt_window)
                         enable_irq_window(vcpu);
                 return;
         }
-        if (!vcpu->arch.nmi_window_open || kvm_run->request_nmi_window)
-                enable_nmi_window(vcpu);
 
         if (vcpu->arch.interrupt_window_open) {
                 if (vcpu->arch.irq_summary && !vcpu->arch.interrupt.pending)
@@ -3040,14 +3038,6 @@ static int handle_nmi_window(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
         vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
         ++vcpu->stat.nmi_window_exits;
 
-        /*
-         * If the user space waits to inject a NMI, exit as soon as possible
-         */
-        if (kvm_run->request_nmi_window && !vcpu->arch.nmi_pending) {
-                kvm_run->exit_reason = KVM_EXIT_NMI_WINDOW_OPEN;
-                return 0;
-        }
-
         return 1;
 }
 
@@ -3162,7 +3152,7 @@ static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
                         vmx->soft_vnmi_blocked = 0;
                         vcpu->arch.nmi_window_open = 1;
                 } else if (vmx->vnmi_blocked_time > 1000000000LL &&
-                    (kvm_run->request_nmi_window || vcpu->arch.nmi_pending)) {
+                           vcpu->arch.nmi_pending) {
                         /*
                          * This CPU don't support us in finding the end of an
                          * NMI-blocked window if the guest runs with IRQs
@@ -3175,16 +3165,6 @@ static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
                         vmx->soft_vnmi_blocked = 0;
                         vmx->vcpu.arch.nmi_window_open = 1;
                 }
-
-                /*
-                 * If the user space waits to inject an NNI, exit ASAP
-                 */
-                if (vcpu->arch.nmi_window_open && kvm_run->request_nmi_window
-                    && !vcpu->arch.nmi_pending) {
-                        kvm_run->exit_reason = KVM_EXIT_NMI_WINDOW_OPEN;
-                        ++vcpu->stat.nmi_window_exits;
-                        return 0;
-                }
         }
 
         if (exit_reason < kvm_vmx_max_exit_handlers
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 10302d3bd415..0e6aa8141dcd 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2887,37 +2887,18 @@ static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
                 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
 }
 
-/*
- * Check if userspace requested a NMI window, and that the NMI window
- * is open.
- *
- * No need to exit to userspace if we already have a NMI queued.
- */
-static int dm_request_for_nmi_injection(struct kvm_vcpu *vcpu,
-                                        struct kvm_run *kvm_run)
-{
-        return (!vcpu->arch.nmi_pending &&
-                kvm_run->request_nmi_window &&
-                vcpu->arch.nmi_window_open);
-}
-
 static void post_kvm_run_save(struct kvm_vcpu *vcpu,
                               struct kvm_run *kvm_run)
 {
         kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
         kvm_run->cr8 = kvm_get_cr8(vcpu);
         kvm_run->apic_base = kvm_get_apic_base(vcpu);
-        if (irqchip_in_kernel(vcpu->kvm)) {
+        if (irqchip_in_kernel(vcpu->kvm))
                 kvm_run->ready_for_interrupt_injection = 1;
-                kvm_run->ready_for_nmi_injection = 1;
-        } else {
+        else
                 kvm_run->ready_for_interrupt_injection =
                                         (vcpu->arch.interrupt_window_open &&
                                          vcpu->arch.irq_summary == 0);
-                kvm_run->ready_for_nmi_injection =
-                                        (vcpu->arch.nmi_window_open &&
-                                         vcpu->arch.nmi_pending == 0);
-        }
 }
 
 static void vapic_enter(struct kvm_vcpu *vcpu)
@@ -3093,11 +3074,6 @@ static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
                 }
 
                 if (r > 0) {
-                        if (dm_request_for_nmi_injection(vcpu, kvm_run)) {
-                                r = -EINTR;
-                                kvm_run->exit_reason = KVM_EXIT_NMI;
-                                ++vcpu->stat.request_nmi_exits;
-                        }
                         if (dm_request_for_irq_injection(vcpu, kvm_run)) {
                                 r = -EINTR;
                                 kvm_run->exit_reason = KVM_EXIT_INTR;
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 48807767e726..35525ac63337 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -84,21 +84,18 @@ struct kvm_irqchip {
 #define KVM_EXIT_S390_RESET       14
 #define KVM_EXIT_DCR              15
 #define KVM_EXIT_NMI              16
-#define KVM_EXIT_NMI_WINDOW_OPEN  17
 
 /* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */
 struct kvm_run {
         /* in */
         __u8 request_interrupt_window;
-        __u8 request_nmi_window;
-        __u8 padding1[6];
+        __u8 padding1[7];
 
         /* out */
         __u32 exit_reason;
         __u8 ready_for_interrupt_injection;
         __u8 if_flag;
-        __u8 ready_for_nmi_injection;
-        __u8 padding2;
+        __u8 padding2[2];
 
         /* in (pre_kvm_run), out (post_kvm_run) */
         __u64 cr8;
@@ -391,12 +388,14 @@ struct kvm_trace_rec {
 #define KVM_CAP_DEVICE_ASSIGNMENT 17
 #endif
 #define KVM_CAP_IOMMU 18
-#define KVM_CAP_NMI 19
 #if defined(CONFIG_X86)
 #define KVM_CAP_DEVICE_MSI 20
 #endif
 /* Bug in KVM_SET_USER_MEMORY_REGION fixed: */
 #define KVM_CAP_DESTROY_MEMORY_REGION_WORKS 21
+#if defined(CONFIG_X86)
+#define KVM_CAP_USER_NMI 22
+#endif
 
 /*
  * ioctls for VM fds