backend:hostmem: replace hostmemory with host_memory
[qemu.git] / backends / hostmem.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 "sysemu/hostmem.h"
13 #include "sysemu/sysemu.h"
14 #include "qapi/visitor.h"
15 #include "qapi/qmp/qerror.h"
16 #include "qemu/config-file.h"
17 #include "qom/object_interfaces.h"
18
19 static void
20 host_memory_backend_get_size(Object *obj, Visitor *v, void *opaque,
21 const char *name, Error **errp)
22 {
23 HostMemoryBackend *backend = MEMORY_BACKEND(obj);
24 uint64_t value = backend->size;
25
26 visit_type_size(v, &value, name, errp);
27 }
28
29 static void
30 host_memory_backend_set_size(Object *obj, Visitor *v, void *opaque,
31 const char *name, Error **errp)
32 {
33 HostMemoryBackend *backend = MEMORY_BACKEND(obj);
34 Error *local_err = NULL;
35 uint64_t value;
36
37 if (memory_region_size(&backend->mr)) {
38 error_setg(&local_err, "cannot change property value");
39 goto out;
40 }
41
42 visit_type_size(v, &value, name, &local_err);
43 if (local_err) {
44 goto out;
45 }
46 if (!value) {
47 error_setg(&local_err, "Property '%s.%s' doesn't take value '%"
48 PRIu64 "'", object_get_typename(obj), name, value);
49 goto out;
50 }
51 backend->size = value;
52 out:
53 error_propagate(errp, local_err);
54 }
55
56 static void host_memory_backend_init(Object *obj)
57 {
58 object_property_add(obj, "size", "int",
59 host_memory_backend_get_size,
60 host_memory_backend_set_size, NULL, NULL, NULL);
61 }
62
63 static void host_memory_backend_finalize(Object *obj)
64 {
65 HostMemoryBackend *backend = MEMORY_BACKEND(obj);
66
67 if (memory_region_size(&backend->mr)) {
68 memory_region_destroy(&backend->mr);
69 }
70 }
71
72 MemoryRegion *
73 host_memory_backend_get_memory(HostMemoryBackend *backend, Error **errp)
74 {
75 return memory_region_size(&backend->mr) ? &backend->mr : NULL;
76 }
77
78 static const TypeInfo host_memory_backend_info = {
79 .name = TYPE_MEMORY_BACKEND,
80 .parent = TYPE_OBJECT,
81 .abstract = true,
82 .class_size = sizeof(HostMemoryBackendClass),
83 .instance_size = sizeof(HostMemoryBackend),
84 .instance_init = host_memory_backend_init,
85 .instance_finalize = host_memory_backend_finalize,
86 .interfaces = (InterfaceInfo[]) {
87 { TYPE_USER_CREATABLE },
88 { }
89 }
90 };
91
92 static void register_types(void)
93 {
94 type_register_static(&host_memory_backend_info);
95 }
96
97 type_init(register_types);