KVM: VMX: Dump VMCS on unexpected #VE

Dump the VMCS on an unexpected #VE, otherwise it's practically impossible
to figure out why the #VE occurred.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20240518000430.1118488-6-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx/vmx.c

@@ -5217,8 +5217,10 @@ static int handle_exception_nmi(struct kvm_vcpu *vcpu)
 	if (is_invalid_opcode(intr_info))
 		return handle_ud(vcpu);
 
-	if (WARN_ON_ONCE(is_ve_fault(intr_info)))
+	if (WARN_ON_ONCE(is_ve_fault(intr_info))) {
+		dump_vmcs(vcpu);
 		return 1;
+	}
 
 	error_code = 0;
 	if (intr_info & INTR_INFO_DELIVER_CODE_MASK)