KVM: nSVM: Hide more stuff under CONFIG_KVM_HYPERV/CONFIG_HYPERV

'struct hv_vmcb_enlightenments' in VMCB only make sense when either
CONFIG_KVM_HYPERV or CONFIG_HYPERV is enabled.

No functional change intended.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Tested-by: Jeremi Piotrowski <jpiotrowski@linux.microsoft.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lore.kernel.org/r/20231205103630.1391318-17-vkuznets@redhat.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

Author: vittyvk

arch/x86/kvm/svm/nested.c

@@ -187,7 +187,6 @@ void recalc_intercepts(struct vcpu_svm *svm)
  */
 static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
 {
-	struct hv_vmcb_enlightenments *hve = &svm->nested.ctl.hv_enlightenments;
 	int i;
 
 	/*
@@ -198,11 +197,16 @@ static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
 	 * - Nested hypervisor (L1) is using Hyper-V emulation interface and
 	 * tells KVM (L0) there were no changes in MSR bitmap for L2.
 	 */
-	if (!svm->nested.force_msr_bitmap_recalc &&
-	    kvm_hv_hypercall_enabled(&svm->vcpu) &&
-	    hve->hv_enlightenments_control.msr_bitmap &&
-	    (svm->nested.ctl.clean & BIT(HV_VMCB_NESTED_ENLIGHTENMENTS)))
-		goto set_msrpm_base_pa;
+#ifdef CONFIG_KVM_HYPERV
+	if (!svm->nested.force_msr_bitmap_recalc) {
+		struct hv_vmcb_enlightenments *hve = &svm->nested.ctl.hv_enlightenments;
+
+		if (kvm_hv_hypercall_enabled(&svm->vcpu) &&
+		    hve->hv_enlightenments_control.msr_bitmap &&
+		    (svm->nested.ctl.clean & BIT(HV_VMCB_NESTED_ENLIGHTENMENTS)))
+			goto set_msrpm_base_pa;
+	}
+#endif
 
 	if (!(vmcb12_is_intercept(&svm->nested.ctl, INTERCEPT_MSR_PROT)))
 		return true;
@@ -230,7 +234,9 @@ static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
 
 	svm->nested.force_msr_bitmap_recalc = false;
 
+#ifdef CONFIG_KVM_HYPERV
 set_msrpm_base_pa:
+#endif
 	svm->vmcb->control.msrpm_base_pa = __sme_set(__pa(svm->nested.msrpm));
 
 	return true;
@@ -378,12 +384,14 @@ void __nested_copy_vmcb_control_to_cache(struct kvm_vcpu *vcpu,
 	to->msrpm_base_pa &= ~0x0fffULL;
 	to->iopm_base_pa  &= ~0x0fffULL;
 
+#ifdef CONFIG_KVM_HYPERV
 	/* Hyper-V extensions (Enlightened VMCB) */
 	if (kvm_hv_hypercall_enabled(vcpu)) {
 		to->clean = from->clean;
 		memcpy(&to->hv_enlightenments, &from->hv_enlightenments,
 		       sizeof(to->hv_enlightenments));
 	}
+#endif
 }
 
 void nested_copy_vmcb_control_to_cache(struct vcpu_svm *svm,

arch/x86/kvm/svm/svm.h

@@ -148,7 +148,9 @@ struct vmcb_ctrl_area_cached {
 	u64 virt_ext;
 	u32 clean;
 	union {
+#if IS_ENABLED(CONFIG_HYPERV) || IS_ENABLED(CONFIG_KVM_HYPERV)
 		struct hv_vmcb_enlightenments hv_enlightenments;
+#endif
 		u8 reserved_sw[32];
 	};
 };