qemu: Introduce qemuDomainDeviceDefValidateControllerSATA

Move the SATA controller check from command line building to
controller def validation. This includes copying the SATA
skip check found in qemuBuildSkipController.

src/qemu/qemu_command.c

@@ -2693,12 +2693,6 @@ qemuBuildControllerDevStr(const virDomainDef *domainDef,
         break;
 
     case VIR_DOMAIN_CONTROLLER_TYPE_SATA:
-        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_ICH9_AHCI)) {
-            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                           _("SATA is not supported with this "
-                             "QEMU binary"));
-            goto error;
-        }
         virBufferAsprintf(&buf, "ahci,id=%s", def->info.alias);
         break;
 

src/qemu/qemu_domain.c

@@ -4386,6 +4386,24 @@ qemuDomainDeviceDefValidateControllerPCI(const virDomainControllerDef *controlle
 }
 
 
+static int
+qemuDomainDeviceDefValidateControllerSATA(const virDomainControllerDef *controller,
+                                          const virDomainDef *def,
+                                          virQEMUCapsPtr qemuCaps)
+{
+    /* first SATA controller on Q35 machines is implicit */
+    if (controller->idx == 0 && qemuDomainIsQ35(def))
+        return 0;
+
+    if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_ICH9_AHCI)) {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                       _("SATA is not supported with this QEMU binary"));
+        return -1;
+    }
+    return 0;
+}
+
+
 static int
 qemuDomainDeviceDefValidateController(const virDomainControllerDef *controller,
                                       const virDomainDef *def,
@@ -4418,8 +4436,12 @@ qemuDomainDeviceDefValidateController(const virDomainControllerDef *controller,
                                                        qemuCaps);
         break;
 
-    case VIR_DOMAIN_CONTROLLER_TYPE_FDC:
     case VIR_DOMAIN_CONTROLLER_TYPE_SATA:
+        ret = qemuDomainDeviceDefValidateControllerSATA(controller, def,
+                                                        qemuCaps);
+        break;
+
+    case VIR_DOMAIN_CONTROLLER_TYPE_FDC:
     case VIR_DOMAIN_CONTROLLER_TYPE_VIRTIO_SERIAL:
     case VIR_DOMAIN_CONTROLLER_TYPE_CCID:
     case VIR_DOMAIN_CONTROLLER_TYPE_USB: