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authorJan Kiszka <jan.kiszka@siemens.com>2013-04-14 21:04:26 +0200
committerGleb Natapov <gleb@redhat.com>2013-04-22 11:10:49 +0300
commitea8ceb8354e1c84a13cf2a8e915dc74f96759393 (patch)
treec200b09a828deaac744f403f76c235ede613ad7e /arch
parent2505dc9fad44491ac4ce06290f358c030abe6be3 (diff)
KVM: nVMX: Fix conditions for NMI injection
The logic for checking if interrupts can be injected has to be applied also on NMIs. The difference is that if NMI interception is on these events are consumed and blocked by the VM exit. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/vmx.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 451ab2a57ca0..11ea3cbbb78c 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -4392,6 +4392,12 @@ static bool nested_exit_on_intr(struct kvm_vcpu *vcpu)
PIN_BASED_EXT_INTR_MASK;
}
+static bool nested_exit_on_nmi(struct kvm_vcpu *vcpu)
+{
+ return get_vmcs12(vcpu)->pin_based_vm_exec_control &
+ PIN_BASED_NMI_EXITING;
+}
+
static void enable_irq_window(struct kvm_vcpu *vcpu)
{
u32 cpu_based_vm_exec_control;
@@ -4517,6 +4523,26 @@ static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
static int vmx_nmi_allowed(struct kvm_vcpu *vcpu)
{
+ if (is_guest_mode(vcpu)) {
+ struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
+
+ if (to_vmx(vcpu)->nested.nested_run_pending)
+ return 0;
+ if (nested_exit_on_nmi(vcpu)) {
+ nested_vmx_vmexit(vcpu);
+ vmcs12->vm_exit_reason = EXIT_REASON_EXCEPTION_NMI;
+ vmcs12->vm_exit_intr_info = NMI_VECTOR |
+ INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK;
+ /*
+ * The NMI-triggered VM exit counts as injection:
+ * clear this one and block further NMIs.
+ */
+ vcpu->arch.nmi_pending = 0;
+ vmx_set_nmi_mask(vcpu, true);
+ return 0;
+ }
+ }
+
if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked)
return 0;