tests: virtio-9p: add version operation test
[qemu.git] / backends / hostmem-ram.c
1 /*
2 * QEMU Host Memory Backend
3 *
4 * Copyright (C) 2013-2014 Red Hat Inc
5 *
6 * Authors:
7 * Igor Mammedov <imammedo@redhat.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
11 */
12 #include "qemu/osdep.h"
13 #include "sysemu/hostmem.h"
14 #include "qapi/error.h"
15 #include "qom/object_interfaces.h"
16
17 #define TYPE_MEMORY_BACKEND_RAM "memory-backend-ram"
18
19
20 static void
21 ram_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
22 {
23 char *path;
24
25 if (!backend->size) {
26 error_setg(errp, "can't create backend with size 0");
27 return;
28 }
29
30 path = object_get_canonical_path_component(OBJECT(backend));
31 memory_region_init_ram(&backend->mr, OBJECT(backend), path,
32 backend->size, errp);
33 g_free(path);
34 }
35
36 static void
37 ram_backend_class_init(ObjectClass *oc, void *data)
38 {
39 HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
40
41 bc->alloc = ram_backend_memory_alloc;
42 }
43
44 static const TypeInfo ram_backend_info = {
45 .name = TYPE_MEMORY_BACKEND_RAM,
46 .parent = TYPE_MEMORY_BACKEND,
47 .class_init = ram_backend_class_init,
48 };
49
50 static void register_types(void)
51 {
52 type_register_static(&ram_backend_info);
53 }
54
55 type_init(register_types);