diff options
| -rw-r--r-- | hw/hw.h | 4 | ||||
| -rw-r--r-- | hw/qdev.c | 16 | ||||
| -rw-r--r-- | hw/qdev.h | 4 | ||||
| -rw-r--r-- | savevm.c | 20 |
4 files changed, 39 insertions, 5 deletions
diff --git a/hw/hw.h b/hw/hw.h index 2d397243d1..fc2d1849d7 100644 --- a/hw/hw.h +++ b/hw/hw.h @@ -758,5 +758,9 @@ extern void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, void *opaque); extern int vmstate_register(int instance_id, const VMStateDescription *vmsd, void *base); +extern int vmstate_register_with_alias_id(int instance_id, + const VMStateDescription *vmsd, + void *base, int alias_id, + int required_for_version); void vmstate_unregister(const VMStateDescription *vmsd, void *opaque); #endif diff --git a/hw/qdev.c b/hw/qdev.c index d3bf0fa43d..af17486976 100644 --- a/hw/qdev.c +++ b/hw/qdev.c @@ -93,6 +93,7 @@ static DeviceState *qdev_create_from_info(BusState *bus, DeviceInfo *info) assert(bus->allow_hotplug); dev->hotplugged = 1; } + dev->instance_id_alias = -1; dev->state = DEV_STATE_CREATED; return dev; } @@ -278,12 +279,23 @@ int qdev_init(DeviceState *dev) return rc; } qemu_register_reset(qdev_reset, dev); - if (dev->info->vmsd) - vmstate_register(-1, dev->info->vmsd, dev); + if (dev->info->vmsd) { + vmstate_register_with_alias_id(-1, dev->info->vmsd, dev, + dev->instance_id_alias, + dev->alias_required_for_version); + } dev->state = DEV_STATE_INITIALIZED; 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; +} + int qdev_unplug(DeviceState *dev) { if (!dev->parent_bus->allow_hotplug) { diff --git a/hw/qdev.h b/hw/qdev.h index d8fbc739a0..a44060e54c 100644 --- a/hw/qdev.h +++ b/hw/qdev.h @@ -44,6 +44,8 @@ struct DeviceState { QLIST_HEAD(, BusState) child_bus; int num_child_bus; QLIST_ENTRY(DeviceState) sibling; + int instance_id_alias; + int alias_required_for_version; }; typedef void (*bus_dev_printfn)(Monitor *mon, DeviceState *dev, int indent); @@ -112,6 +114,8 @@ int qdev_device_help(QemuOpts *opts); DeviceState *qdev_device_add(QemuOpts *opts); int qdev_init(DeviceState *dev) QEMU_WARN_UNUSED_RESULT; void qdev_init_nofail(DeviceState *dev); +void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id, + int required_for_version); int qdev_unplug(DeviceState *dev); void qdev_free(DeviceState *dev); int qdev_simple_unplug_cb(DeviceState *dev); diff --git a/savevm.c b/savevm.c index 74e553c53d..dc20390b8f 100644 --- a/savevm.c +++ b/savevm.c @@ -991,6 +991,7 @@ typedef struct SaveStateEntry { QTAILQ_ENTRY(SaveStateEntry) entry; char idstr[256]; int instance_id; + int alias_id; int version_id; int section_id; SaveSetParamsHandler *set_params; @@ -1079,11 +1080,16 @@ void unregister_savevm(const char *idstr, void *opaque) } } -int vmstate_register(int instance_id, const VMStateDescription *vmsd, - void *opaque) +int vmstate_register_with_alias_id(int instance_id, + const VMStateDescription *vmsd, + void *opaque, int alias_id, + int required_for_version) { SaveStateEntry *se; + /* If this triggers, alias support can be dropped for the vmsd. */ + assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); + se = qemu_mallocz(sizeof(SaveStateEntry)); pstrcpy(se->idstr, sizeof(se->idstr), vmsd->name); se->version_id = vmsd->version_id; @@ -1093,6 +1099,7 @@ int vmstate_register(int instance_id, const VMStateDescription *vmsd, se->load_state = NULL; se->opaque = opaque; se->vmsd = vmsd; + se->alias_id = alias_id; if (instance_id == -1) { se->instance_id = calculate_new_instance_id(vmsd->name); @@ -1104,6 +1111,12 @@ int vmstate_register(int instance_id, const VMStateDescription *vmsd, return 0; } +int vmstate_register(int instance_id, const VMStateDescription *vmsd, + void *opaque) +{ + return vmstate_register_with_alias_id(instance_id, vmsd, opaque, -1, 0); +} + void vmstate_unregister(const VMStateDescription *vmsd, void *opaque) { SaveStateEntry *se, *new_se; @@ -1433,7 +1446,8 @@ static SaveStateEntry *find_se(const char *idstr, int instance_id) QTAILQ_FOREACH(se, &savevm_handlers, entry) { if (!strcmp(se->idstr, idstr) && - instance_id == se->instance_id) + (instance_id == se->instance_id || + instance_id == se->alias_id)) return se; } return NULL; |