[RFC,09/13] hw/nvme: add experimental device x-nvme-ctrl

diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index 6a4f07b8d114..ec63338b5bfc 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -6551,8 +6551,28 @@  void nvme_attach_ns(NvmeState *n, NvmeNamespace *ns)
 
 static void nvme_realize(PCIDevice *pci_dev, Error **errp)
 {
-    NvmeCtrl *ctrl = NVME_DEVICE(pci_dev);
-    NvmeState *n = NVME_STATE(ctrl);
+    NvmeState *n = NVME_STATE(pci_dev);
+
+    if (nvme_check_constraints(n, errp)) {
+        return;
+    }
+
+    nvme_init_state(n);
+    if (nvme_init_pci(n, pci_dev, errp)) {
+        return;
+    }
+
+    if (nvme_init_subsys(n, errp)) {
+        return;
+    }
+
+    nvme_init_ctrl(n, pci_dev);
+}
+
+static void nvme_legacy_realize(PCIDevice *pci_dev, Error **errp)
+{
+    NvmeState *n = NVME_STATE(pci_dev);
+    NvmeCtrlLegacyDevice *ctrl = NVME_DEVICE_LEGACY(n);
 
     if (ctrl->namespace.blkconf.blk && n->subsys) {
         error_setg(errp, "subsystem support is unavailable with legacy "
@@ -6575,6 +6595,7 @@  static void nvme_realize(PCIDevice *pci_dev, Error **errp)
     if (nvme_init_subsys(n, errp)) {
         return;
     }
+
     nvme_init_ctrl(n, pci_dev);
 
     /* setup a namespace if the controller drive property was given */
@@ -6629,24 +6650,40 @@  static Property nvme_state_props[] = {
     DEFINE_PROP_LINK("subsys", NvmeState, subsys, TYPE_NVME_SUBSYS,
                      NvmeSubsystem *),
     DEFINE_PROP_STRING("serial", NvmeState, params.serial),
-    DEFINE_PROP_UINT32("cmb_size_mb", NvmeState, params.cmb_size_mb, 0),
-    DEFINE_PROP_UINT32("num_queues", NvmeState, params.num_queues, 0),
-    DEFINE_PROP_UINT32("max_ioqpairs", NvmeState, params.max_ioqpairs, 64),
-    DEFINE_PROP_UINT16("msix_qsize", NvmeState, params.msix_qsize, 65),
     DEFINE_PROP_UINT8("aerl", NvmeState, params.aerl, 3),
-    DEFINE_PROP_UINT32("aer_max_queued", NvmeState, params.aer_max_queued, 64),
     DEFINE_PROP_UINT8("mdts", NvmeState, params.mdts, 7),
-    DEFINE_PROP_UINT8("vsl", NvmeState, params.vsl, 7),
-    DEFINE_PROP_BOOL("use-intel-id", NvmeState, params.use_intel_id, false),
     DEFINE_PROP_BOOL("legacy-cmb", NvmeState, params.legacy_cmb, false),
-    DEFINE_PROP_UINT8("zoned.zasl", NvmeState, params.zasl, 0),
-    DEFINE_PROP_BOOL("zoned.auto_transition", NvmeState,
-                     params.auto_transition_zones, true),
     DEFINE_PROP_END_OF_LIST(),
 };
 
 static Property nvme_props[] = {
-    DEFINE_BLOCK_PROPERTIES(NvmeCtrl, namespace.blkconf),
+    DEFINE_PROP_UINT32("cmb-size-mb", NvmeState, params.cmb_size_mb, 0),
+    DEFINE_PROP_UINT32("max-aen-retention", NvmeState, params.aer_max_queued, 64),
+    DEFINE_PROP_UINT32("max-ioqpairs", NvmeState, params.max_ioqpairs, 64),
+    DEFINE_PROP_UINT16("msix-vectors", NvmeState, params.msix_qsize, 2048),
+
+    /* nvm command set specific properties */
+    DEFINE_PROP_UINT8("nvm-vsl", NvmeState, params.vsl, 7),
+
+    /* zoned command set specific properties */
+    DEFINE_PROP_UINT8("zoned-zasl", NvmeState, params.zasl, 0),
+    DEFINE_PROP_BOOL("zoned-auto-transition-zones", NvmeState,
+                     params.auto_transition_zones, true),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static Property nvme_legacy_props[] = {
+    DEFINE_BLOCK_PROPERTIES(NvmeCtrlLegacyDevice, namespace.blkconf),
+    DEFINE_PROP_UINT32("cmb_size_mb", NvmeState, params.cmb_size_mb, 0),
+    DEFINE_PROP_UINT32("num_queues", NvmeState, params.num_queues, 0),
+    DEFINE_PROP_UINT32("aer_max_queued", NvmeState, params.aer_max_queued, 64),
+    DEFINE_PROP_UINT32("max_ioqpairs", NvmeState, params.max_ioqpairs, 64),
+    DEFINE_PROP_UINT16("msix_qsize", NvmeState, params.msix_qsize, 65),
+    DEFINE_PROP_BOOL("use-intel-id", NvmeState, params.use_intel_id, false),
+    DEFINE_PROP_UINT8("vsl", NvmeState, params.vsl, 7),
+    DEFINE_PROP_UINT8("zoned.zasl", NvmeState, params.zasl, 0),
+    DEFINE_PROP_BOOL("zoned.auto_transition", NvmeState,
+                     params.auto_transition_zones, true),
     DEFINE_PROP_END_OF_LIST(),
 };
 
@@ -6702,7 +6739,6 @@  static void nvme_state_class_init(ObjectClass *oc, void *data)
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc);
 
-    pc->realize = nvme_realize;
     pc->exit = nvme_exit;
     pc->class_id = PCI_CLASS_STORAGE_EXPRESS;
     pc->revision = 2;
@@ -6736,25 +6772,45 @@  static const TypeInfo nvme_state_info = {
 static void nvme_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
+    PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc);
+
+    pc->realize = nvme_realize;
+
     device_class_set_props(dc, nvme_props);
 }
 
-static void nvme_instance_init(Object *obj)
-{
-    NvmeCtrl *ctrl = NVME_DEVICE(obj);
-
-    device_add_bootindex_property(obj, &ctrl->namespace.blkconf.bootindex,
-                                  "bootindex", "/namespace@1,0",
-                                  DEVICE(obj));
-}
-
 static const TypeInfo nvme_info = {
     .name = TYPE_NVME_DEVICE,
     .parent = TYPE_NVME_STATE,
     .class_init = nvme_class_init,
     .instance_size = sizeof(NvmeCtrl),
-    .instance_init = nvme_instance_init,
-    .class_init = nvme_class_init,
+};
+
+static void nvme_legacy_instance_init(Object *obj)
+{
+    NvmeCtrlLegacyDevice *ctrl = NVME_DEVICE_LEGACY(obj);
+
+    device_add_bootindex_property(obj, &ctrl->namespace.blkconf.bootindex,
+                                  "bootindex", "/namespace@1,0",
+                                  DEVICE(obj));
+}
+
+static void nvme_legacy_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+    PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc);
+
+    pc->realize = nvme_legacy_realize;
+
+    device_class_set_props(dc, nvme_legacy_props);
+}
+
+static const TypeInfo nvme_legacy_info = {
+    .name = TYPE_NVME_DEVICE_LEGACY,
+    .parent = TYPE_NVME_STATE,
+    .class_init = nvme_legacy_class_init,
+    .instance_size = sizeof(NvmeCtrlLegacyDevice),
+    .instance_init = nvme_legacy_instance_init,
 };
 
 static const TypeInfo nvme_bus_info = {
@@ -6763,11 +6819,12 @@  static const TypeInfo nvme_bus_info = {
     .instance_size = sizeof(NvmeBus),
 };
 
-static void nvme_register_types(void)
+static void register_types(void)
 {
     type_register_static(&nvme_state_info);
     type_register_static(&nvme_info);
+    type_register_static(&nvme_legacy_info);
     type_register_static(&nvme_bus_info);
 }
 
-type_init(nvme_register_types)
+type_init(register_types)
diff --git a/hw/nvme/nvme.h b/hw/nvme/nvme.h
index 980a471e195f..629a8ccab9f8 100644
--- a/hw/nvme/nvme.h
+++ b/hw/nvme/nvme.h
@@ -35,9 +35,12 @@  typedef struct NvmeNamespace NvmeNamespace;
 #define TYPE_NVME_STATE "nvme-state"
 OBJECT_DECLARE_SIMPLE_TYPE(NvmeState, NVME_STATE)
 
-#define TYPE_NVME_DEVICE "nvme"
+#define TYPE_NVME_DEVICE "x-nvme-ctrl"
 OBJECT_DECLARE_SIMPLE_TYPE(NvmeCtrl, NVME_DEVICE)
 
+#define TYPE_NVME_DEVICE_LEGACY "nvme"
+OBJECT_DECLARE_SIMPLE_TYPE(NvmeCtrlLegacyDevice, NVME_DEVICE_LEGACY)
+
 #define TYPE_NVME_BUS "nvme-bus"
 OBJECT_DECLARE_SIMPLE_TYPE(NvmeBus, NVME_BUS)
 
@@ -457,12 +460,16 @@  typedef struct NvmeState {
 
 typedef struct NvmeCtrl {
     NvmeState parent_obj;
+} NvmeCtrl;
+
+typedef struct NvmeCtrlLegacyDevice {
+    NvmeState parent_obj;
 
     NvmeBus bus;
 
     /* for use with legacy single namespace (-device nvme,drive=...) setups */
     NvmeNamespaceDevice namespace;
-} NvmeCtrl;
+} NvmeCtrlLegacyDevice;
 
 static inline NvmeNamespace *nvme_ns(NvmeState *n, uint32_t nsid)
 {