KVM: VMX: Define a VMX glue macro for kvm_complete_insn_gp()

JIRA: https://issues.redhat.com/browse/RHEL-47242

commit 1a81d9d
Author: Vishal Verma <vishal.l.verma@intel.com>
Date:   Tue Mar 18 00:35:08 2025 -0600

    KVM: VMX: Define a VMX glue macro for kvm_complete_insn_gp()

    Define kvm_complete_insn_gp() as vmx_complete_emulated_msr() and use the
    glue wrapper in vt_complete_emulated_msr() so that VT's
    .complete_emulated_msr() implementation follows the soon-to-be-standard
    pattern of:

        vt_abc:
            if (is_td())
                return tdx_abc();
            return vmx_abc();

    This will allow generating such wrappers via a macro, which in turn will
    make it trivially easy to skip the wrappers entirely when KVM_INTEL_TDX=n.

    Suggested-by: Sean Christopherson <seanjc@google.com>
    Link: https://lore.kernel.org/kvm/Z6v9yjWLNTU6X90d@google.com/
    Cc: Sean Christopherson <seanjc@google.com>
    Cc: Rick Edgecombe <rick.p.edgecombe@intel.com>
    Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
    Link: https://lore.kernel.org/r/20250318-vverma7-cleanup_x86_ops-v2-3-701e82d6b779@intel.com
    [sean: massage shortlog+changelog]
    Signed-off-by: Sean Christopherson <seanjc@google.com>

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>

Author: Maxim Levitsky

arch/x86/kvm/vmx/main.c

@@ -240,7 +240,7 @@ static int vt_complete_emulated_msr(struct kvm_vcpu *vcpu, int err)
 	if (is_td_vcpu(vcpu))
 		return tdx_complete_emulated_msr(vcpu, err);
 
-	return kvm_complete_insn_gp(vcpu, err);
+	return vmx_complete_emulated_msr(vcpu, err);
 }
 
 #ifdef CONFIG_KVM_SMM

arch/x86/kvm/vmx/x86_ops.h

@@ -57,6 +57,7 @@ void vmx_prepare_switch_to_guest(struct kvm_vcpu *vcpu);
 void vmx_update_exception_bitmap(struct kvm_vcpu *vcpu);
 int vmx_get_feature_msr(u32 msr, u64 *data);
 int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
+#define vmx_complete_emulated_msr kvm_complete_insn_gp
 u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg);
 void vmx_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
 void vmx_set_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);