From: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Report NMIs as allowed when the vCPU is in L2 and L2 is being run with
Exit-on-NMI enabled, as NMIs are always unblocked from L1's perspective
in this case.
Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Message-Id: <20200423022550.15113-7-sean.j.christopherson@xxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
arch/x86/kvm/vmx/nested.c | 5 -----
arch/x86/kvm/vmx/nested.h | 5 +++++
arch/x86/kvm/vmx/vmx.c | 3 +++
3 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 182e5209a1f6..9edd9464fedf 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -698,11 +698,6 @@ static bool nested_exit_intr_ack_set(struct kvm_vcpu *vcpu)
VM_EXIT_ACK_INTR_ON_EXIT;
}
-static bool nested_exit_on_nmi(struct kvm_vcpu *vcpu)
-{
- return nested_cpu_has_nmi_exiting(get_vmcs12(vcpu));
-}
-
static int nested_vmx_check_apic_access_controls(struct kvm_vcpu *vcpu,
struct vmcs12 *vmcs12)
{
diff --git a/arch/x86/kvm/vmx/nested.h b/arch/x86/kvm/vmx/nested.h
index 7ce9572c3d3a..5cc72ae0e277 100644
--- a/arch/x86/kvm/vmx/nested.h
+++ b/arch/x86/kvm/vmx/nested.h
@@ -225,6 +225,11 @@ static inline bool nested_cpu_has_save_preemption_timer(struct vmcs12 *vmcs12)
VM_EXIT_SAVE_VMX_PREEMPTION_TIMER;
}
+static inline bool nested_exit_on_nmi(struct kvm_vcpu *vcpu)
+{
+ return nested_cpu_has_nmi_exiting(get_vmcs12(vcpu));
+}
+
/*
* In nested virtualization, check if L1 asked to exit on external interrupts.
* For most existing hypervisors, this will always return true.
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index c33317bfc1cf..37b1986a4e8f 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4516,6 +4516,9 @@ static bool vmx_nmi_allowed(struct kvm_vcpu *vcpu)
if (to_vmx(vcpu)->nested.nested_run_pending)
return false;
+ if (is_guest_mode(vcpu) && nested_exit_on_nmi(vcpu))
+ return true;
+
if (!enable_vnmi &&
to_vmx(vcpu)->loaded_vmcs->soft_vnmi_blocked)
return false;
--
2.18.2
