Patchwork [04/12] qdev: rename qdev.c to qdev-core.c

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Submitter Eduardo Habkost
Date Oct. 16, 2012, 7:08 p.m.
Message ID <1350414523-8117-5-git-send-email-ehabkost@redhat.com>
Download mbox | patch
Permalink /patch/191878/
State New
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Comments

Eduardo Habkost - Oct. 16, 2012, 7:08 p.m.
Just to make clear that it's the qdev core code, corresponding to
qdev-core.h.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 hw/Makefile.objs |   2 +-
 hw/qdev-core.c   | 716 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 hw/qdev.c        | 716 -------------------------------------------------------
 3 files changed, 717 insertions(+), 717 deletions(-)
 create mode 100644 hw/qdev-core.c
 delete mode 100644 hw/qdev.c

Patch

diff --git a/hw/Makefile.objs b/hw/Makefile.objs
index 16f23c0..70f2014 100644
--- a/hw/Makefile.objs
+++ b/hw/Makefile.objs
@@ -180,7 +180,7 @@  common-obj-$(CONFIG_SD) += sd.o
 common-obj-y += bt.o bt-l2cap.o bt-sdp.o bt-hci.o bt-hid.o
 common-obj-y += bt-hci-csr.o
 common-obj-y += msmouse.o ps2.o
-common-obj-y += qdev.o qdev-properties.o qdev-monitor.o
+common-obj-y += qdev-core.o qdev-properties.o qdev-monitor.o
 common-obj-y += qdev-system.o qdev-properties-system.o
 common-obj-$(CONFIG_BRLAPI) += baum.o
 
diff --git a/hw/qdev-core.c b/hw/qdev-core.c
new file mode 100644
index 0000000..ee19dd5
--- /dev/null
+++ b/hw/qdev-core.c
@@ -0,0 +1,716 @@ 
+/*
+ *  Dynamic device configuration and creation.
+ *
+ *  Copyright (c) 2009 CodeSourcery
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* The theory here is that it should be possible to create a machine without
+   knowledge of specific devices.  Historically board init routines have
+   passed a bunch of arguments to each device, requiring the board know
+   exactly which device it is dealing with.  This file provides an abstract
+   API for device configuration and initialization.  Devices will generally
+   inherit from a particular bus (e.g. PCI or I2C) rather than
+   this API directly.  */
+
+#include "qdev.h"
+#include "sysemu.h"
+#include "error.h"
+#include "qapi/qapi-visit-core.h"
+
+int qdev_hotplug = 0;
+static bool qdev_hot_added = false;
+static bool qdev_hot_removed = false;
+
+const VMStateDescription *qdev_get_vmsd(DeviceState *dev)
+{
+    DeviceClass *dc = DEVICE_GET_CLASS(dev);
+    return dc->vmsd;
+}
+
+const char *qdev_fw_name(DeviceState *dev)
+{
+    DeviceClass *dc = DEVICE_GET_CLASS(dev);
+
+    if (dc->fw_name) {
+        return dc->fw_name;
+    }
+
+    return object_get_typename(OBJECT(dev));
+}
+
+static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
+                                     Error **errp);
+
+static void bus_remove_child(BusState *bus, DeviceState *child)
+{
+    BusChild *kid;
+
+    QTAILQ_FOREACH(kid, &bus->children, sibling) {
+        if (kid->child == child) {
+            char name[32];
+
+            snprintf(name, sizeof(name), "child[%d]", kid->index);
+            QTAILQ_REMOVE(&bus->children, kid, sibling);
+            object_property_del(OBJECT(bus), name, NULL);
+            g_free(kid);
+            return;
+        }
+    }
+}
+
+static void bus_add_child(BusState *bus, DeviceState *child)
+{
+    char name[32];
+    BusChild *kid = g_malloc0(sizeof(*kid));
+
+    if (qdev_hotplug) {
+        assert(bus->allow_hotplug);
+    }
+
+    kid->index = bus->max_index++;
+    kid->child = child;
+
+    QTAILQ_INSERT_HEAD(&bus->children, kid, sibling);
+
+    snprintf(name, sizeof(name), "child[%d]", kid->index);
+    object_property_add_link(OBJECT(bus), name,
+                             object_get_typename(OBJECT(child)),
+                             (Object **)&kid->child,
+                             NULL);
+}
+
+void qdev_set_parent_bus(DeviceState *dev, BusState *bus)
+{
+    dev->parent_bus = bus;
+    bus_add_child(bus, dev);
+}
+
+/* Initialize a device.  Device properties should be set before calling
+   this function.  IRQs and MMIO regions should be connected/mapped after
+   calling this function.
+   On failure, destroy the device and return negative value.
+   Return 0 on success.  */
+int qdev_init(DeviceState *dev)
+{
+    DeviceClass *dc = DEVICE_GET_CLASS(dev);
+    int rc;
+
+    assert(dev->state == DEV_STATE_CREATED);
+
+    rc = dc->init(dev);
+    if (rc < 0) {
+        qdev_free(dev);
+        return rc;
+    }
+
+    if (!OBJECT(dev)->parent) {
+        static int unattached_count = 0;
+        gchar *name = g_strdup_printf("device[%d]", unattached_count++);
+
+        object_property_add_child(container_get(qdev_get_machine(),
+                                                "/unattached"),
+                                  name, OBJECT(dev), NULL);
+        g_free(name);
+    }
+
+    if (qdev_get_vmsd(dev)) {
+        vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
+                                       dev->instance_id_alias,
+                                       dev->alias_required_for_version);
+    }
+    dev->state = DEV_STATE_INITIALIZED;
+    if (dev->hotplugged) {
+        device_reset(dev);
+    }
+    return 0;
+}
+
+void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
+                                 int required_for_version)
+{
+    assert(dev->state == DEV_STATE_CREATED);
+    dev->instance_id_alias = alias_id;
+    dev->alias_required_for_version = required_for_version;
+}
+
+void qdev_unplug(DeviceState *dev, Error **errp)
+{
+    DeviceClass *dc = DEVICE_GET_CLASS(dev);
+
+    if (!dev->parent_bus->allow_hotplug) {
+        error_set(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
+        return;
+    }
+    assert(dc->unplug != NULL);
+
+    qdev_hot_removed = true;
+
+    if (dc->unplug(dev) < 0) {
+        error_set(errp, QERR_UNDEFINED_ERROR);
+        return;
+    }
+}
+
+static int qdev_reset_one(DeviceState *dev, void *opaque)
+{
+    device_reset(dev);
+
+    return 0;
+}
+
+static int qbus_reset_one(BusState *bus, void *opaque)
+{
+    BusClass *bc = BUS_GET_CLASS(bus);
+    if (bc->reset) {
+        return bc->reset(bus);
+    }
+    return 0;
+}
+
+void qdev_reset_all(DeviceState *dev)
+{
+    qdev_walk_children(dev, qdev_reset_one, qbus_reset_one, NULL);
+}
+
+void qbus_reset_all_fn(void *opaque)
+{
+    BusState *bus = opaque;
+    qbus_walk_children(bus, qdev_reset_one, qbus_reset_one, NULL);
+}
+
+/* can be used as ->unplug() callback for the simple cases */
+int qdev_simple_unplug_cb(DeviceState *dev)
+{
+    /* just zap it */
+    qdev_free(dev);
+    return 0;
+}
+
+
+/* Like qdev_init(), but terminate program via error_report() instead of
+   returning an error value.  This is okay during machine creation.
+   Don't use for hotplug, because there callers need to recover from
+   failure.  Exception: if you know the device's init() callback can't
+   fail, then qdev_init_nofail() can't fail either, and is therefore
+   usable even then.  But relying on the device implementation that
+   way is somewhat unclean, and best avoided.  */
+void qdev_init_nofail(DeviceState *dev)
+{
+    const char *typename = object_get_typename(OBJECT(dev));
+
+    if (qdev_init(dev) < 0) {
+        error_report("Initialization of device %s failed", typename);
+        exit(1);
+    }
+}
+
+/* Unlink device from bus and free the structure.  */
+void qdev_free(DeviceState *dev)
+{
+    object_delete(OBJECT(dev));
+}
+
+void qdev_machine_creation_done(void)
+{
+    /*
+     * ok, initial machine setup is done, starting from now we can
+     * only create hotpluggable devices
+     */
+    qdev_hotplug = 1;
+}
+
+bool qdev_machine_modified(void)
+{
+    return qdev_hot_added || qdev_hot_removed;
+}
+
+BusState *qdev_get_parent_bus(DeviceState *dev)
+{
+    return dev->parent_bus;
+}
+
+BusState *qdev_get_child_bus(DeviceState *dev, const char *name)
+{
+    BusState *bus;
+
+    QLIST_FOREACH(bus, &dev->child_bus, sibling) {
+        if (strcmp(name, bus->name) == 0) {
+            return bus;
+        }
+    }
+    return NULL;
+}
+
+int qbus_walk_children(BusState *bus, qdev_walkerfn *devfn,
+                       qbus_walkerfn *busfn, void *opaque)
+{
+    BusChild *kid;
+    int err;
+
+    if (busfn) {
+        err = busfn(bus, opaque);
+        if (err) {
+            return err;
+        }
+    }
+
+    QTAILQ_FOREACH(kid, &bus->children, sibling) {
+        err = qdev_walk_children(kid->child, devfn, busfn, opaque);
+        if (err < 0) {
+            return err;
+        }
+    }
+
+    return 0;
+}
+
+int qdev_walk_children(DeviceState *dev, qdev_walkerfn *devfn,
+                       qbus_walkerfn *busfn, void *opaque)
+{
+    BusState *bus;
+    int err;
+
+    if (devfn) {
+        err = devfn(dev, opaque);
+        if (err) {
+            return err;
+        }
+    }
+
+    QLIST_FOREACH(bus, &dev->child_bus, sibling) {
+        err = qbus_walk_children(bus, devfn, busfn, opaque);
+        if (err < 0) {
+            return err;
+        }
+    }
+
+    return 0;
+}
+
+DeviceState *qdev_find_recursive(BusState *bus, const char *id)
+{
+    BusChild *kid;
+    DeviceState *ret;
+    BusState *child;
+
+    QTAILQ_FOREACH(kid, &bus->children, sibling) {
+        DeviceState *dev = kid->child;
+
+        if (dev->id && strcmp(dev->id, id) == 0) {
+            return dev;
+        }
+
+        QLIST_FOREACH(child, &dev->child_bus, sibling) {
+            ret = qdev_find_recursive(child, id);
+            if (ret) {
+                return ret;
+            }
+        }
+    }
+    return NULL;
+}
+
+static void qbus_realize(BusState *bus)
+{
+    const char *typename = object_get_typename(OBJECT(bus));
+    char *buf;
+    int i,len;
+
+    if (bus->name) {
+        /* use supplied name */
+    } else if (bus->parent && bus->parent->id) {
+        /* parent device has id -> use it for bus name */
+        len = strlen(bus->parent->id) + 16;
+        buf = g_malloc(len);
+        snprintf(buf, len, "%s.%d", bus->parent->id, bus->parent->num_child_bus);
+        bus->name = buf;
+    } else {
+        /* no id -> use lowercase bus type for bus name */
+        len = strlen(typename) + 16;
+        buf = g_malloc(len);
+        len = snprintf(buf, len, "%s.%d", typename,
+                       bus->parent ? bus->parent->num_child_bus : 0);
+        for (i = 0; i < len; i++)
+            buf[i] = qemu_tolower(buf[i]);
+        bus->name = buf;
+    }
+
+    if (bus->parent) {
+        QLIST_INSERT_HEAD(&bus->parent->child_bus, bus, sibling);
+        bus->parent->num_child_bus++;
+        object_property_add_child(OBJECT(bus->parent), bus->name, OBJECT(bus), NULL);
+    } else if (bus != sysbus_get_default()) {
+        /* TODO: once all bus devices are qdevified,
+           only reset handler for main_system_bus should be registered here. */
+        qemu_register_reset(qbus_reset_all_fn, bus);
+    }
+}
+
+void qbus_create_inplace(BusState *bus, const char *typename,
+                         DeviceState *parent, const char *name)
+{
+    object_initialize(bus, typename);
+
+    bus->parent = parent;
+    bus->name = name ? g_strdup(name) : NULL;
+    qbus_realize(bus);
+}
+
+BusState *qbus_create(const char *typename, DeviceState *parent, const char *name)
+{
+    BusState *bus;
+
+    bus = BUS(object_new(typename));
+    bus->qom_allocated = true;
+
+    bus->parent = parent;
+    bus->name = name ? g_strdup(name) : NULL;
+    qbus_realize(bus);
+
+    return bus;
+}
+
+void qbus_free(BusState *bus)
+{
+    if (bus->qom_allocated) {
+        object_delete(OBJECT(bus));
+    } else {
+        object_finalize(OBJECT(bus));
+        if (bus->glib_allocated) {
+            g_free(bus);
+        }
+    }
+}
+
+static char *bus_get_fw_dev_path(BusState *bus, DeviceState *dev)
+{
+    BusClass *bc = BUS_GET_CLASS(bus);
+
+    if (bc->get_fw_dev_path) {
+        return bc->get_fw_dev_path(dev);
+    }
+
+    return NULL;
+}
+
+static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size)
+{
+    int l = 0;
+
+    if (dev && dev->parent_bus) {
+        char *d;
+        l = qdev_get_fw_dev_path_helper(dev->parent_bus->parent, p, size);
+        d = bus_get_fw_dev_path(dev->parent_bus, dev);
+        if (d) {
+            l += snprintf(p + l, size - l, "%s", d);
+            g_free(d);
+        } else {
+            l += snprintf(p + l, size - l, "%s", object_get_typename(OBJECT(dev)));
+        }
+    }
+    l += snprintf(p + l , size - l, "/");
+
+    return l;
+}
+
+char* qdev_get_fw_dev_path(DeviceState *dev)
+{
+    char path[128];
+    int l;
+
+    l = qdev_get_fw_dev_path_helper(dev, path, 128);
+
+    path[l-1] = '\0';
+
+    return g_strdup(path);
+}
+
+char *qdev_get_dev_path(DeviceState *dev)
+{
+    BusClass *bc;
+
+    if (!dev || !dev->parent_bus) {
+        return NULL;
+    }
+
+    bc = BUS_GET_CLASS(dev->parent_bus);
+    if (bc->get_dev_path) {
+        return bc->get_dev_path(dev);
+    }
+
+    return NULL;
+}
+
+/**
+ * Legacy property handling
+ */
+
+static void qdev_get_legacy_property(Object *obj, Visitor *v, void *opaque,
+                                     const char *name, Error **errp)
+{
+    DeviceState *dev = DEVICE(obj);
+    Property *prop = opaque;
+
+    char buffer[1024];
+    char *ptr = buffer;
+
+    prop->info->print(dev, prop, buffer, sizeof(buffer));
+    visit_type_str(v, &ptr, name, errp);
+}
+
+static void qdev_set_legacy_property(Object *obj, Visitor *v, void *opaque,
+                                     const char *name, Error **errp)
+{
+    DeviceState *dev = DEVICE(obj);
+    Property *prop = opaque;
+    Error *local_err = NULL;
+    char *ptr = NULL;
+    int ret;
+
+    if (dev->state != DEV_STATE_CREATED) {
+        error_set(errp, QERR_PERMISSION_DENIED);
+        return;
+    }
+
+    visit_type_str(v, &ptr, name, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    ret = prop->info->parse(dev, prop, ptr);
+    error_set_from_qdev_prop_error(errp, ret, dev, prop, ptr);
+    g_free(ptr);
+}
+
+/**
+ * @qdev_add_legacy_property - adds a legacy property
+ *
+ * Do not use this is new code!  Properties added through this interface will
+ * be given names and types in the "legacy" namespace.
+ *
+ * Legacy properties are string versions of other OOM properties.  The format
+ * of the string depends on the property type.
+ */
+void qdev_property_add_legacy(DeviceState *dev, Property *prop,
+                              Error **errp)
+{
+    gchar *name, *type;
+
+    /* Register pointer properties as legacy properties */
+    if (!prop->info->print && !prop->info->parse &&
+        (prop->info->set || prop->info->get)) {
+        return;
+    }
+
+    name = g_strdup_printf("legacy-%s", prop->name);
+    type = g_strdup_printf("legacy<%s>",
+                           prop->info->legacy_name ?: prop->info->name);
+
+    object_property_add(OBJECT(dev), name, type,
+                        prop->info->print ? qdev_get_legacy_property : prop->info->get,
+                        prop->info->parse ? qdev_set_legacy_property : prop->info->set,
+                        NULL,
+                        prop, errp);
+
+    g_free(type);
+    g_free(name);
+}
+
+/**
+ * @qdev_property_add_static - add a @Property to a device.
+ *
+ * Static properties access data in a struct.  The actual type of the
+ * property and the field depends on the property type.
+ */
+void qdev_property_add_static(DeviceState *dev, Property *prop,
+                              Error **errp)
+{
+    Error *local_err = NULL;
+    Object *obj = OBJECT(dev);
+
+    /*
+     * TODO qdev_prop_ptr does not have getters or setters.  It must
+     * go now that it can be replaced with links.  The test should be
+     * removed along with it: all static properties are read/write.
+     */
+    if (!prop->info->get && !prop->info->set) {
+        return;
+    }
+
+    object_property_add(obj, prop->name, prop->info->name,
+                        prop->info->get, prop->info->set,
+                        prop->info->release,
+                        prop, &local_err);
+
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+    if (prop->qtype == QTYPE_NONE) {
+        return;
+    }
+
+    if (prop->qtype == QTYPE_QBOOL) {
+        object_property_set_bool(obj, prop->defval, prop->name, &local_err);
+    } else if (prop->info->enum_table) {
+        object_property_set_str(obj, prop->info->enum_table[prop->defval],
+                                prop->name, &local_err);
+    } else if (prop->qtype == QTYPE_QINT) {
+        object_property_set_int(obj, prop->defval, prop->name, &local_err);
+    }
+    assert_no_error(local_err);
+}
+
+static void device_initfn(Object *obj)
+{
+    DeviceState *dev = DEVICE(obj);
+    ObjectClass *class;
+    Property *prop;
+
+    if (qdev_hotplug) {
+        dev->hotplugged = 1;
+        qdev_hot_added = true;
+    }
+
+    dev->instance_id_alias = -1;
+    dev->state = DEV_STATE_CREATED;
+
+    class = object_get_class(OBJECT(dev));
+    do {
+        for (prop = DEVICE_CLASS(class)->props; prop && prop->name; prop++) {
+            qdev_property_add_legacy(dev, prop, NULL);
+            qdev_property_add_static(dev, prop, NULL);
+        }
+        class = object_class_get_parent(class);
+    } while (class != object_class_by_name(TYPE_DEVICE));
+    qdev_prop_set_globals(dev);
+
+    object_property_add_link(OBJECT(dev), "parent_bus", TYPE_BUS,
+                             (Object **)&dev->parent_bus, NULL);
+}
+
+/* Unlink device from bus and free the structure.  */
+static void device_finalize(Object *obj)
+{
+    DeviceState *dev = DEVICE(obj);
+    BusState *bus;
+    DeviceClass *dc = DEVICE_GET_CLASS(dev);
+
+    if (dev->state == DEV_STATE_INITIALIZED) {
+        while (dev->num_child_bus) {
+            bus = QLIST_FIRST(&dev->child_bus);
+            qbus_free(bus);
+        }
+        if (qdev_get_vmsd(dev)) {
+            vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
+        }
+        if (dc->exit) {
+            dc->exit(dev);
+        }
+        if (dev->opts) {
+            qemu_opts_del(dev->opts);
+        }
+    }
+    if (dev->parent_bus) {
+        bus_remove_child(dev->parent_bus, dev);
+    }
+}
+
+static void device_class_base_init(ObjectClass *class, void *data)
+{
+    DeviceClass *klass = DEVICE_CLASS(class);
+
+    /* We explicitly look up properties in the superclasses,
+     * so do not propagate them to the subclasses.
+     */
+    klass->props = NULL;
+}
+
+void device_reset(DeviceState *dev)
+{
+    DeviceClass *klass = DEVICE_GET_CLASS(dev);
+
+    if (klass->reset) {
+        klass->reset(dev);
+    }
+}
+
+Object *qdev_get_machine(void)
+{
+    static Object *dev;
+
+    if (dev == NULL) {
+        dev = container_get(object_get_root(), "/machine");
+    }
+
+    return dev;
+}
+
+static TypeInfo device_type_info = {
+    .name = TYPE_DEVICE,
+    .parent = TYPE_OBJECT,
+    .instance_size = sizeof(DeviceState),
+    .instance_init = device_initfn,
+    .instance_finalize = device_finalize,
+    .class_base_init = device_class_base_init,
+    .abstract = true,
+    .class_size = sizeof(DeviceClass),
+};
+
+static void qbus_initfn(Object *obj)
+{
+    BusState *bus = BUS(obj);
+
+    QTAILQ_INIT(&bus->children);
+}
+
+static void qbus_finalize(Object *obj)
+{
+    BusState *bus = BUS(obj);
+    BusChild *kid;
+
+    while ((kid = QTAILQ_FIRST(&bus->children)) != NULL) {
+        DeviceState *dev = kid->child;
+        qdev_free(dev);
+    }
+    if (bus->parent) {
+        QLIST_REMOVE(bus, sibling);
+        bus->parent->num_child_bus--;
+    } else {
+        assert(bus != sysbus_get_default()); /* main_system_bus is never freed */
+        qemu_unregister_reset(qbus_reset_all_fn, bus);
+    }
+    g_free((char *)bus->name);
+}
+
+static const TypeInfo bus_info = {
+    .name = TYPE_BUS,
+    .parent = TYPE_OBJECT,
+    .instance_size = sizeof(BusState),
+    .abstract = true,
+    .class_size = sizeof(BusClass),
+    .instance_init = qbus_initfn,
+    .instance_finalize = qbus_finalize,
+};
+
+static void qdev_register_types(void)
+{
+    type_register_static(&bus_info);
+    type_register_static(&device_type_info);
+}
+
+type_init(qdev_register_types)
diff --git a/hw/qdev.c b/hw/qdev.c
deleted file mode 100644
index ee19dd5..0000000
--- a/hw/qdev.c
+++ /dev/null
@@ -1,716 +0,0 @@ 
-/*
- *  Dynamic device configuration and creation.
- *
- *  Copyright (c) 2009 CodeSourcery
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>.
- */
-
-/* The theory here is that it should be possible to create a machine without
-   knowledge of specific devices.  Historically board init routines have
-   passed a bunch of arguments to each device, requiring the board know
-   exactly which device it is dealing with.  This file provides an abstract
-   API for device configuration and initialization.  Devices will generally
-   inherit from a particular bus (e.g. PCI or I2C) rather than
-   this API directly.  */
-
-#include "qdev.h"
-#include "sysemu.h"
-#include "error.h"
-#include "qapi/qapi-visit-core.h"
-
-int qdev_hotplug = 0;
-static bool qdev_hot_added = false;
-static bool qdev_hot_removed = false;
-
-const VMStateDescription *qdev_get_vmsd(DeviceState *dev)
-{
-    DeviceClass *dc = DEVICE_GET_CLASS(dev);
-    return dc->vmsd;
-}
-
-const char *qdev_fw_name(DeviceState *dev)
-{
-    DeviceClass *dc = DEVICE_GET_CLASS(dev);
-
-    if (dc->fw_name) {
-        return dc->fw_name;
-    }
-
-    return object_get_typename(OBJECT(dev));
-}
-
-static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
-                                     Error **errp);
-
-static void bus_remove_child(BusState *bus, DeviceState *child)
-{
-    BusChild *kid;
-
-    QTAILQ_FOREACH(kid, &bus->children, sibling) {
-        if (kid->child == child) {
-            char name[32];
-
-            snprintf(name, sizeof(name), "child[%d]", kid->index);
-            QTAILQ_REMOVE(&bus->children, kid, sibling);
-            object_property_del(OBJECT(bus), name, NULL);
-            g_free(kid);
-            return;
-        }
-    }
-}
-
-static void bus_add_child(BusState *bus, DeviceState *child)
-{
-    char name[32];
-    BusChild *kid = g_malloc0(sizeof(*kid));
-
-    if (qdev_hotplug) {
-        assert(bus->allow_hotplug);
-    }
-
-    kid->index = bus->max_index++;
-    kid->child = child;
-
-    QTAILQ_INSERT_HEAD(&bus->children, kid, sibling);
-
-    snprintf(name, sizeof(name), "child[%d]", kid->index);
-    object_property_add_link(OBJECT(bus), name,
-                             object_get_typename(OBJECT(child)),
-                             (Object **)&kid->child,
-                             NULL);
-}
-
-void qdev_set_parent_bus(DeviceState *dev, BusState *bus)
-{
-    dev->parent_bus = bus;
-    bus_add_child(bus, dev);
-}
-
-/* Initialize a device.  Device properties should be set before calling
-   this function.  IRQs and MMIO regions should be connected/mapped after
-   calling this function.
-   On failure, destroy the device and return negative value.
-   Return 0 on success.  */
-int qdev_init(DeviceState *dev)
-{
-    DeviceClass *dc = DEVICE_GET_CLASS(dev);
-    int rc;
-
-    assert(dev->state == DEV_STATE_CREATED);
-
-    rc = dc->init(dev);
-    if (rc < 0) {
-        qdev_free(dev);
-        return rc;
-    }
-
-    if (!OBJECT(dev)->parent) {
-        static int unattached_count = 0;
-        gchar *name = g_strdup_printf("device[%d]", unattached_count++);
-
-        object_property_add_child(container_get(qdev_get_machine(),
-                                                "/unattached"),
-                                  name, OBJECT(dev), NULL);
-        g_free(name);
-    }
-
-    if (qdev_get_vmsd(dev)) {
-        vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
-                                       dev->instance_id_alias,
-                                       dev->alias_required_for_version);
-    }
-    dev->state = DEV_STATE_INITIALIZED;
-    if (dev->hotplugged) {
-        device_reset(dev);
-    }
-    return 0;
-}
-
-void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
-                                 int required_for_version)
-{
-    assert(dev->state == DEV_STATE_CREATED);
-    dev->instance_id_alias = alias_id;
-    dev->alias_required_for_version = required_for_version;
-}
-
-void qdev_unplug(DeviceState *dev, Error **errp)
-{
-    DeviceClass *dc = DEVICE_GET_CLASS(dev);
-
-    if (!dev->parent_bus->allow_hotplug) {
-        error_set(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
-        return;
-    }
-    assert(dc->unplug != NULL);
-
-    qdev_hot_removed = true;
-
-    if (dc->unplug(dev) < 0) {
-        error_set(errp, QERR_UNDEFINED_ERROR);
-        return;
-    }
-}
-
-static int qdev_reset_one(DeviceState *dev, void *opaque)
-{
-    device_reset(dev);
-
-    return 0;
-}
-
-static int qbus_reset_one(BusState *bus, void *opaque)
-{
-    BusClass *bc = BUS_GET_CLASS(bus);
-    if (bc->reset) {
-        return bc->reset(bus);
-    }
-    return 0;
-}
-
-void qdev_reset_all(DeviceState *dev)
-{
-    qdev_walk_children(dev, qdev_reset_one, qbus_reset_one, NULL);
-}
-
-void qbus_reset_all_fn(void *opaque)
-{
-    BusState *bus = opaque;
-    qbus_walk_children(bus, qdev_reset_one, qbus_reset_one, NULL);
-}
-
-/* can be used as ->unplug() callback for the simple cases */
-int qdev_simple_unplug_cb(DeviceState *dev)
-{
-    /* just zap it */
-    qdev_free(dev);
-    return 0;
-}
-
-
-/* Like qdev_init(), but terminate program via error_report() instead of
-   returning an error value.  This is okay during machine creation.
-   Don't use for hotplug, because there callers need to recover from
-   failure.  Exception: if you know the device's init() callback can't
-   fail, then qdev_init_nofail() can't fail either, and is therefore
-   usable even then.  But relying on the device implementation that
-   way is somewhat unclean, and best avoided.  */
-void qdev_init_nofail(DeviceState *dev)
-{
-    const char *typename = object_get_typename(OBJECT(dev));
-
-    if (qdev_init(dev) < 0) {
-        error_report("Initialization of device %s failed", typename);
-        exit(1);
-    }
-}
-
-/* Unlink device from bus and free the structure.  */
-void qdev_free(DeviceState *dev)
-{
-    object_delete(OBJECT(dev));
-}
-
-void qdev_machine_creation_done(void)
-{
-    /*
-     * ok, initial machine setup is done, starting from now we can
-     * only create hotpluggable devices
-     */
-    qdev_hotplug = 1;
-}
-
-bool qdev_machine_modified(void)
-{
-    return qdev_hot_added || qdev_hot_removed;
-}
-
-BusState *qdev_get_parent_bus(DeviceState *dev)
-{
-    return dev->parent_bus;
-}
-
-BusState *qdev_get_child_bus(DeviceState *dev, const char *name)
-{
-    BusState *bus;
-
-    QLIST_FOREACH(bus, &dev->child_bus, sibling) {
-        if (strcmp(name, bus->name) == 0) {
-            return bus;
-        }
-    }
-    return NULL;
-}
-
-int qbus_walk_children(BusState *bus, qdev_walkerfn *devfn,
-                       qbus_walkerfn *busfn, void *opaque)
-{
-    BusChild *kid;
-    int err;
-
-    if (busfn) {
-        err = busfn(bus, opaque);
-        if (err) {
-            return err;
-        }
-    }
-
-    QTAILQ_FOREACH(kid, &bus->children, sibling) {
-        err = qdev_walk_children(kid->child, devfn, busfn, opaque);
-        if (err < 0) {
-            return err;
-        }
-    }
-
-    return 0;
-}
-
-int qdev_walk_children(DeviceState *dev, qdev_walkerfn *devfn,
-                       qbus_walkerfn *busfn, void *opaque)
-{
-    BusState *bus;
-    int err;
-
-    if (devfn) {
-        err = devfn(dev, opaque);
-        if (err) {
-            return err;
-        }
-    }
-
-    QLIST_FOREACH(bus, &dev->child_bus, sibling) {
-        err = qbus_walk_children(bus, devfn, busfn, opaque);
-        if (err < 0) {
-            return err;
-        }
-    }
-
-    return 0;
-}
-
-DeviceState *qdev_find_recursive(BusState *bus, const char *id)
-{
-    BusChild *kid;
-    DeviceState *ret;
-    BusState *child;
-
-    QTAILQ_FOREACH(kid, &bus->children, sibling) {
-        DeviceState *dev = kid->child;
-
-        if (dev->id && strcmp(dev->id, id) == 0) {
-            return dev;
-        }
-
-        QLIST_FOREACH(child, &dev->child_bus, sibling) {
-            ret = qdev_find_recursive(child, id);
-            if (ret) {
-                return ret;
-            }
-        }
-    }
-    return NULL;
-}
-
-static void qbus_realize(BusState *bus)
-{
-    const char *typename = object_get_typename(OBJECT(bus));
-    char *buf;
-    int i,len;
-
-    if (bus->name) {
-        /* use supplied name */
-    } else if (bus->parent && bus->parent->id) {
-        /* parent device has id -> use it for bus name */
-        len = strlen(bus->parent->id) + 16;
-        buf = g_malloc(len);
-        snprintf(buf, len, "%s.%d", bus->parent->id, bus->parent->num_child_bus);
-        bus->name = buf;
-    } else {
-        /* no id -> use lowercase bus type for bus name */
-        len = strlen(typename) + 16;
-        buf = g_malloc(len);
-        len = snprintf(buf, len, "%s.%d", typename,
-                       bus->parent ? bus->parent->num_child_bus : 0);
-        for (i = 0; i < len; i++)
-            buf[i] = qemu_tolower(buf[i]);
-        bus->name = buf;
-    }
-
-    if (bus->parent) {
-        QLIST_INSERT_HEAD(&bus->parent->child_bus, bus, sibling);
-        bus->parent->num_child_bus++;
-        object_property_add_child(OBJECT(bus->parent), bus->name, OBJECT(bus), NULL);
-    } else if (bus != sysbus_get_default()) {
-        /* TODO: once all bus devices are qdevified,
-           only reset handler for main_system_bus should be registered here. */
-        qemu_register_reset(qbus_reset_all_fn, bus);
-    }
-}
-
-void qbus_create_inplace(BusState *bus, const char *typename,
-                         DeviceState *parent, const char *name)
-{
-    object_initialize(bus, typename);
-
-    bus->parent = parent;
-    bus->name = name ? g_strdup(name) : NULL;
-    qbus_realize(bus);
-}
-
-BusState *qbus_create(const char *typename, DeviceState *parent, const char *name)
-{
-    BusState *bus;
-
-    bus = BUS(object_new(typename));
-    bus->qom_allocated = true;
-
-    bus->parent = parent;
-    bus->name = name ? g_strdup(name) : NULL;
-    qbus_realize(bus);
-
-    return bus;
-}
-
-void qbus_free(BusState *bus)
-{
-    if (bus->qom_allocated) {
-        object_delete(OBJECT(bus));
-    } else {
-        object_finalize(OBJECT(bus));
-        if (bus->glib_allocated) {
-            g_free(bus);
-        }
-    }
-}
-
-static char *bus_get_fw_dev_path(BusState *bus, DeviceState *dev)
-{
-    BusClass *bc = BUS_GET_CLASS(bus);
-
-    if (bc->get_fw_dev_path) {
-        return bc->get_fw_dev_path(dev);
-    }
-
-    return NULL;
-}
-
-static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size)
-{
-    int l = 0;
-
-    if (dev && dev->parent_bus) {
-        char *d;
-        l = qdev_get_fw_dev_path_helper(dev->parent_bus->parent, p, size);
-        d = bus_get_fw_dev_path(dev->parent_bus, dev);
-        if (d) {
-            l += snprintf(p + l, size - l, "%s", d);
-            g_free(d);
-        } else {
-            l += snprintf(p + l, size - l, "%s", object_get_typename(OBJECT(dev)));
-        }
-    }
-    l += snprintf(p + l , size - l, "/");
-
-    return l;
-}
-
-char* qdev_get_fw_dev_path(DeviceState *dev)
-{
-    char path[128];
-    int l;
-
-    l = qdev_get_fw_dev_path_helper(dev, path, 128);
-
-    path[l-1] = '\0';
-
-    return g_strdup(path);
-}
-
-char *qdev_get_dev_path(DeviceState *dev)
-{
-    BusClass *bc;
-
-    if (!dev || !dev->parent_bus) {
-        return NULL;
-    }
-
-    bc = BUS_GET_CLASS(dev->parent_bus);
-    if (bc->get_dev_path) {
-        return bc->get_dev_path(dev);
-    }
-
-    return NULL;
-}
-
-/**
- * Legacy property handling
- */
-
-static void qdev_get_legacy_property(Object *obj, Visitor *v, void *opaque,
-                                     const char *name, Error **errp)
-{
-    DeviceState *dev = DEVICE(obj);
-    Property *prop = opaque;
-
-    char buffer[1024];
-    char *ptr = buffer;
-
-    prop->info->print(dev, prop, buffer, sizeof(buffer));
-    visit_type_str(v, &ptr, name, errp);
-}
-
-static void qdev_set_legacy_property(Object *obj, Visitor *v, void *opaque,
-                                     const char *name, Error **errp)
-{
-    DeviceState *dev = DEVICE(obj);
-    Property *prop = opaque;
-    Error *local_err = NULL;
-    char *ptr = NULL;
-    int ret;
-
-    if (dev->state != DEV_STATE_CREATED) {
-        error_set(errp, QERR_PERMISSION_DENIED);
-        return;
-    }
-
-    visit_type_str(v, &ptr, name, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        return;
-    }
-
-    ret = prop->info->parse(dev, prop, ptr);
-    error_set_from_qdev_prop_error(errp, ret, dev, prop, ptr);
-    g_free(ptr);
-}
-
-/**
- * @qdev_add_legacy_property - adds a legacy property
- *
- * Do not use this is new code!  Properties added through this interface will
- * be given names and types in the "legacy" namespace.
- *
- * Legacy properties are string versions of other OOM properties.  The format
- * of the string depends on the property type.
- */
-void qdev_property_add_legacy(DeviceState *dev, Property *prop,
-                              Error **errp)
-{
-    gchar *name, *type;
-
-    /* Register pointer properties as legacy properties */
-    if (!prop->info->print && !prop->info->parse &&
-        (prop->info->set || prop->info->get)) {
-        return;
-    }
-
-    name = g_strdup_printf("legacy-%s", prop->name);
-    type = g_strdup_printf("legacy<%s>",
-                           prop->info->legacy_name ?: prop->info->name);
-
-    object_property_add(OBJECT(dev), name, type,
-                        prop->info->print ? qdev_get_legacy_property : prop->info->get,
-                        prop->info->parse ? qdev_set_legacy_property : prop->info->set,
-                        NULL,
-                        prop, errp);
-
-    g_free(type);
-    g_free(name);
-}
-
-/**
- * @qdev_property_add_static - add a @Property to a device.
- *
- * Static properties access data in a struct.  The actual type of the
- * property and the field depends on the property type.
- */
-void qdev_property_add_static(DeviceState *dev, Property *prop,
-                              Error **errp)
-{
-    Error *local_err = NULL;
-    Object *obj = OBJECT(dev);
-
-    /*
-     * TODO qdev_prop_ptr does not have getters or setters.  It must
-     * go now that it can be replaced with links.  The test should be
-     * removed along with it: all static properties are read/write.
-     */
-    if (!prop->info->get && !prop->info->set) {
-        return;
-    }
-
-    object_property_add(obj, prop->name, prop->info->name,
-                        prop->info->get, prop->info->set,
-                        prop->info->release,
-                        prop, &local_err);
-
-    if (local_err) {
-        error_propagate(errp, local_err);
-        return;
-    }
-    if (prop->qtype == QTYPE_NONE) {
-        return;
-    }
-
-    if (prop->qtype == QTYPE_QBOOL) {
-        object_property_set_bool(obj, prop->defval, prop->name, &local_err);
-    } else if (prop->info->enum_table) {
-        object_property_set_str(obj, prop->info->enum_table[prop->defval],
-                                prop->name, &local_err);
-    } else if (prop->qtype == QTYPE_QINT) {
-        object_property_set_int(obj, prop->defval, prop->name, &local_err);
-    }
-    assert_no_error(local_err);
-}
-
-static void device_initfn(Object *obj)
-{
-    DeviceState *dev = DEVICE(obj);
-    ObjectClass *class;
-    Property *prop;
-
-    if (qdev_hotplug) {
-        dev->hotplugged = 1;
-        qdev_hot_added = true;
-    }
-
-    dev->instance_id_alias = -1;
-    dev->state = DEV_STATE_CREATED;
-
-    class = object_get_class(OBJECT(dev));
-    do {
-        for (prop = DEVICE_CLASS(class)->props; prop && prop->name; prop++) {
-            qdev_property_add_legacy(dev, prop, NULL);
-            qdev_property_add_static(dev, prop, NULL);
-        }
-        class = object_class_get_parent(class);
-    } while (class != object_class_by_name(TYPE_DEVICE));
-    qdev_prop_set_globals(dev);
-
-    object_property_add_link(OBJECT(dev), "parent_bus", TYPE_BUS,
-                             (Object **)&dev->parent_bus, NULL);
-}
-
-/* Unlink device from bus and free the structure.  */
-static void device_finalize(Object *obj)
-{
-    DeviceState *dev = DEVICE(obj);
-    BusState *bus;
-    DeviceClass *dc = DEVICE_GET_CLASS(dev);
-
-    if (dev->state == DEV_STATE_INITIALIZED) {
-        while (dev->num_child_bus) {
-            bus = QLIST_FIRST(&dev->child_bus);
-            qbus_free(bus);
-        }
-        if (qdev_get_vmsd(dev)) {
-            vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
-        }
-        if (dc->exit) {
-            dc->exit(dev);
-        }
-        if (dev->opts) {
-            qemu_opts_del(dev->opts);
-        }
-    }
-    if (dev->parent_bus) {
-        bus_remove_child(dev->parent_bus, dev);
-    }
-}
-
-static void device_class_base_init(ObjectClass *class, void *data)
-{
-    DeviceClass *klass = DEVICE_CLASS(class);
-
-    /* We explicitly look up properties in the superclasses,
-     * so do not propagate them to the subclasses.
-     */
-    klass->props = NULL;
-}
-
-void device_reset(DeviceState *dev)
-{
-    DeviceClass *klass = DEVICE_GET_CLASS(dev);
-
-    if (klass->reset) {
-        klass->reset(dev);
-    }
-}
-
-Object *qdev_get_machine(void)
-{
-    static Object *dev;
-
-    if (dev == NULL) {
-        dev = container_get(object_get_root(), "/machine");
-    }
-
-    return dev;
-}
-
-static TypeInfo device_type_info = {
-    .name = TYPE_DEVICE,
-    .parent = TYPE_OBJECT,
-    .instance_size = sizeof(DeviceState),
-    .instance_init = device_initfn,
-    .instance_finalize = device_finalize,
-    .class_base_init = device_class_base_init,
-    .abstract = true,
-    .class_size = sizeof(DeviceClass),
-};
-
-static void qbus_initfn(Object *obj)
-{
-    BusState *bus = BUS(obj);
-
-    QTAILQ_INIT(&bus->children);
-}
-
-static void qbus_finalize(Object *obj)
-{
-    BusState *bus = BUS(obj);
-    BusChild *kid;
-
-    while ((kid = QTAILQ_FIRST(&bus->children)) != NULL) {
-        DeviceState *dev = kid->child;
-        qdev_free(dev);
-    }
-    if (bus->parent) {
-        QLIST_REMOVE(bus, sibling);
-        bus->parent->num_child_bus--;
-    } else {
-        assert(bus != sysbus_get_default()); /* main_system_bus is never freed */
-        qemu_unregister_reset(qbus_reset_all_fn, bus);
-    }
-    g_free((char *)bus->name);
-}
-
-static const TypeInfo bus_info = {
-    .name = TYPE_BUS,
-    .parent = TYPE_OBJECT,
-    .instance_size = sizeof(BusState),
-    .abstract = true,
-    .class_size = sizeof(BusClass),
-    .instance_init = qbus_initfn,
-    .instance_finalize = qbus_finalize,
-};
-
-static void qdev_register_types(void)
-{
-    type_register_static(&bus_info);
-    type_register_static(&device_type_info);
-}
-
-type_init(qdev_register_types)