hostmem: allow preallocation of any memory region
[qemu.git] / include / sysemu / hostmem.h
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 #ifndef QEMU_RAM_H
13 #define QEMU_RAM_H
14
15 #include "qom/object.h"
16 #include "qapi/error.h"
17 #include "exec/memory.h"
18 #include "qemu/option.h"
19
20 #define TYPE_MEMORY_BACKEND "memory-backend"
21 #define MEMORY_BACKEND(obj) \
22 OBJECT_CHECK(HostMemoryBackend, (obj), TYPE_MEMORY_BACKEND)
23 #define MEMORY_BACKEND_GET_CLASS(obj) \
24 OBJECT_GET_CLASS(HostMemoryBackendClass, (obj), TYPE_MEMORY_BACKEND)
25 #define MEMORY_BACKEND_CLASS(klass) \
26 OBJECT_CLASS_CHECK(HostMemoryBackendClass, (klass), TYPE_MEMORY_BACKEND)
27
28 typedef struct HostMemoryBackend HostMemoryBackend;
29 typedef struct HostMemoryBackendClass HostMemoryBackendClass;
30
31 /**
32 * HostMemoryBackendClass:
33 * @parent_class: opaque parent class container
34 */
35 struct HostMemoryBackendClass {
36 ObjectClass parent_class;
37
38 void (*alloc)(HostMemoryBackend *backend, Error **errp);
39 };
40
41 /**
42 * @HostMemoryBackend
43 *
44 * @parent: opaque parent object container
45 * @size: amount of memory backend provides
46 * @id: unique identification string in memdev namespace
47 * @mr: MemoryRegion representing host memory belonging to backend
48 */
49 struct HostMemoryBackend {
50 /* private */
51 Object parent;
52
53 /* protected */
54 uint64_t size;
55 bool merge, dump;
56 bool prealloc, force_prealloc;
57
58 MemoryRegion mr;
59 };
60
61 MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend,
62 Error **errp);
63
64 #endif