KVM: x86: Account for failing enable_irq_window for NMI window request
With VMX, enable_irq_window can now return -EBUSY, in which case an
immediate exit shall be requested before entering the guest. Account for
this also in enable_nmi_window which uses enable_irq_window in absence
of vnmi support, e.g.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 96f914e..94f35d2 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5756,7 +5756,8 @@
/* enable NMI/IRQ window open exits if needed */
if (vcpu->arch.nmi_pending)
- kvm_x86_ops->enable_nmi_window(vcpu);
+ req_immediate_exit =
+ kvm_x86_ops->enable_nmi_window(vcpu) != 0;
else if (kvm_cpu_has_injectable_intr(vcpu) || req_int_win)
req_immediate_exit =
kvm_x86_ops->enable_irq_window(vcpu) != 0;