xref: /qemu/include/sysemu/hostmem.h (revision 52ea63de)
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 "sysemu/sysemu.h" /* for MAX_NODES */
16 #include "qom/object.h"
17 #include "exec/memory.h"
18 #include "qemu/option.h"
19 #include "qemu/bitmap.h"
20 
21 #define TYPE_MEMORY_BACKEND "memory-backend"
22 #define MEMORY_BACKEND(obj) \
23     OBJECT_CHECK(HostMemoryBackend, (obj), TYPE_MEMORY_BACKEND)
24 #define MEMORY_BACKEND_GET_CLASS(obj) \
25     OBJECT_GET_CLASS(HostMemoryBackendClass, (obj), TYPE_MEMORY_BACKEND)
26 #define MEMORY_BACKEND_CLASS(klass) \
27     OBJECT_CLASS_CHECK(HostMemoryBackendClass, (klass), TYPE_MEMORY_BACKEND)
28 
29 typedef struct HostMemoryBackend HostMemoryBackend;
30 typedef struct HostMemoryBackendClass HostMemoryBackendClass;
31 
32 /**
33  * HostMemoryBackendClass:
34  * @parent_class: opaque parent class container
35  */
36 struct HostMemoryBackendClass {
37     ObjectClass parent_class;
38 
39     void (*alloc)(HostMemoryBackend *backend, Error **errp);
40 };
41 
42 /**
43  * @HostMemoryBackend
44  *
45  * @parent: opaque parent object container
46  * @size: amount of memory backend provides
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     DECLARE_BITMAP(host_nodes, MAX_NODES + 1);
58     HostMemPolicy policy;
59 
60     MemoryRegion mr;
61 };
62 
63 MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend,
64                                              Error **errp);
65 
66 #endif
67