[PATCH v3 3/8] KVM: VMX: Move the shared NMI handler/trampoline to common code

[Sean Christopherson <seanjc@google.com>]

Move vmx_handle_nmi() to main.c to capture that it's a common handler and
to allow guarding against incorrectly using to_vmx().

Opportunistically use a "vt" prefix instead of "vmx" to communicate that
it's a shared handler.

No functional change intended.

Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Tested-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kvm/vmx/common.h |  2 +-
 arch/x86/kvm/vmx/main.c   | 11 +++++++++++
 arch/x86/kvm/vmx/tdx.c    |  2 +-
 arch/x86/kvm/vmx/vmx.c    | 13 +------------
 4 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/arch/x86/kvm/vmx/common.h b/arch/x86/kvm/vmx/common.h
index 88f637c81353..4b1d46eafd0f 100644
--- a/arch/x86/kvm/vmx/common.h
+++ b/arch/x86/kvm/vmx/common.h
@@ -189,6 +189,6 @@ static inline void __vmx_deliver_posted_interrupt(struct kvm_vcpu *vcpu,
 	kvm_vcpu_trigger_posted_interrupt(vcpu, POSTED_INTR_VECTOR);
 }
 
-noinstr void vmx_handle_nmi(struct kvm_vcpu *vcpu);
+noinstr void vt_handle_nmi(struct kvm_vcpu *vcpu);
 
 #endif /* __KVM_X86_VMX_COMMON_H */
diff --git a/arch/x86/kvm/vmx/main.c b/arch/x86/kvm/vmx/main.c
index 9614f43e7987..b1069a8e30a7 100644
--- a/arch/x86/kvm/vmx/main.c
+++ b/arch/x86/kvm/vmx/main.c
@@ -947,6 +947,17 @@ static void vt_handle_exit_irqoff(struct kvm_vcpu *vcpu)
 	}
 }
 
+noinstr void vt_handle_nmi(struct kvm_vcpu *vcpu)
+{
+	if ((u16)vmx_get_exit_reason(vcpu).basic != EXIT_REASON_EXCEPTION_NMI ||
+	    !is_nmi(vmx_get_intr_info(vcpu)))
+		return;
+
+	kvm_before_interrupt(vcpu, KVM_HANDLING_NMI);
+	x86_entry_from_kvm(EVENT_TYPE_NMI, NMI_VECTOR);
+	kvm_after_interrupt(vcpu);
+}
+
 #define VMX_REQUIRED_APICV_INHIBITS				\
 	(BIT(APICV_INHIBIT_REASON_DISABLED) |			\
 	 BIT(APICV_INHIBIT_REASON_ABSENT) |			\
diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
index b272c20586a7..46b0e798f8b9 100644
--- a/arch/x86/kvm/vmx/tdx.c
+++ b/arch/x86/kvm/vmx/tdx.c
@@ -974,7 +974,7 @@ static noinstr void tdx_vcpu_enter_exit(struct kvm_vcpu *vcpu)
 	tdx->exit_gpa = tdx->vp_enter_args.r8;
 	vt->exit_intr_info = tdx->vp_enter_args.r9;
 
-	vmx_handle_nmi(vcpu);
+	vt_handle_nmi(vcpu);
 
 	guest_state_exit_irqoff();
 }
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index adf2bc13bed2..a06dd2d77f10 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7363,17 +7363,6 @@ static fastpath_t vmx_exit_handlers_fastpath(struct kvm_vcpu *vcpu,
 	}
 }
 
-noinstr void vmx_handle_nmi(struct kvm_vcpu *vcpu)
-{
-	if ((u16)vmx_get_exit_reason(vcpu).basic != EXIT_REASON_EXCEPTION_NMI ||
-	    !is_nmi(vmx_get_intr_info(vcpu)))
-		return;
-
-	kvm_before_interrupt(vcpu, KVM_HANDLING_NMI);
-	x86_entry_from_kvm(EVENT_TYPE_NMI, NMI_VECTOR);
-	kvm_after_interrupt(vcpu);
-}
-
 static noinstr void vmx_vcpu_enter_exit(struct kvm_vcpu *vcpu,
 					unsigned int flags)
 {
@@ -7406,7 +7395,7 @@ static noinstr void vmx_vcpu_enter_exit(struct kvm_vcpu *vcpu,
 	if (likely(!vmx_get_exit_reason(vcpu).failed_vmentry))
 		vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
 
-	vmx_handle_nmi(vcpu);
+	vt_handle_nmi(vcpu);
 
 out:
 	guest_state_exit_irqoff();
-- 
2.55.0.979.g7e5102b832-goog