KVM: nVMX: Move "vmcs12 to shadow/evmcs sync" to helper function

...so that the function doesn't need to be created when moving the
nested code out of vmx.c.

Signed-off-by: Sean Christopherson <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>

Author: Sean Christopherson

arch/x86/kvm/vmx/vmx.c

@@ -9113,6 +9113,30 @@ static void vmx_update_hv_timer(struct kvm_vcpu *vcpu)
 	vmx->loaded_vmcs->hv_timer_armed = false;
 }
 
+static void nested_sync_from_vmcs12(struct kvm_vcpu *vcpu)
+{
+	struct vcpu_vmx *vmx = to_vmx(vcpu);
+
+	/*
+	 * hv_evmcs may end up being not mapped after migration (when
+	 * L2 was running), map it here to make sure vmcs12 changes are
+	 * properly reflected.
+	 */
+	if (vmx->nested.enlightened_vmcs_enabled && !vmx->nested.hv_evmcs)
+		nested_vmx_handle_enlightened_vmptrld(vcpu, false);
+
+	if (vmx->nested.hv_evmcs) {
+		copy_vmcs12_to_enlightened(vmx);
+		/* All fields are clean */
+		vmx->nested.hv_evmcs->hv_clean_fields |=
+			HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL;
+	} else {
+		copy_vmcs12_to_shadow(vmx);
+	}
+
+	vmx->nested.need_vmcs12_sync = false;
+}
+
 static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
 {
 	struct vcpu_vmx *vmx = to_vmx(vcpu);
@@ -9133,26 +9157,8 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
 		vmcs_write32(PLE_WINDOW, vmx->ple_window);
 	}
 
-	if (vmx->nested.need_vmcs12_sync) {
-		/*
-		 * hv_evmcs may end up being not mapped after migration (when
-		 * L2 was running), map it here to make sure vmcs12 changes are
-		 * properly reflected.
-		 */
-		if (vmx->nested.enlightened_vmcs_enabled &&
-		    !vmx->nested.hv_evmcs)
-			nested_vmx_handle_enlightened_vmptrld(vcpu, false);
-
-		if (vmx->nested.hv_evmcs) {
-			copy_vmcs12_to_enlightened(vmx);
-			/* All fields are clean */
-			vmx->nested.hv_evmcs->hv_clean_fields |=
-				HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL;
-		} else {
-			copy_vmcs12_to_shadow(vmx);
-		}
-		vmx->nested.need_vmcs12_sync = false;
-	}
+	if (vmx->nested.need_vmcs12_sync)
+		nested_sync_from_vmcs12(vcpu);
 
 	if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty))
 		vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]);