2 * QEMU Host Memory Backend
4 * Copyright (C) 2013-2014 Red Hat Inc
7 * Igor Mammedov <imammedo@redhat.com>
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.
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"
20 host_memory_backend_get_size(Object
*obj
, Visitor
*v
, void *opaque
,
21 const char *name
, Error
**errp
)
23 HostMemoryBackend
*backend
= MEMORY_BACKEND(obj
);
24 uint64_t value
= backend
->size
;
26 visit_type_size(v
, &value
, name
, errp
);
30 host_memory_backend_set_size(Object
*obj
, Visitor
*v
, void *opaque
,
31 const char *name
, Error
**errp
)
33 HostMemoryBackend
*backend
= MEMORY_BACKEND(obj
);
34 Error
*local_err
= NULL
;
37 if (memory_region_size(&backend
->mr
)) {
38 error_setg(&local_err
, "cannot change property value");
42 visit_type_size(v
, &value
, name
, &local_err
);
47 error_setg(&local_err
, "Property '%s.%s' doesn't take value '%"
48 PRIu64
"'", object_get_typename(obj
), name
, value
);
51 backend
->size
= value
;
53 error_propagate(errp
, local_err
);
56 static void host_memory_backend_init(Object
*obj
)
58 object_property_add(obj
, "size", "int",
59 host_memory_backend_get_size
,
60 host_memory_backend_set_size
, NULL
, NULL
, NULL
);
63 static void host_memory_backend_finalize(Object
*obj
)
65 HostMemoryBackend
*backend
= MEMORY_BACKEND(obj
);
67 if (memory_region_size(&backend
->mr
)) {
68 memory_region_destroy(&backend
->mr
);
73 host_memory_backend_get_memory(HostMemoryBackend
*backend
, Error
**errp
)
75 return memory_region_size(&backend
->mr
) ? &backend
->mr
: NULL
;
79 host_memory_backend_memory_complete(UserCreatable
*uc
, Error
**errp
)
81 HostMemoryBackend
*backend
= MEMORY_BACKEND(uc
);
82 HostMemoryBackendClass
*bc
= MEMORY_BACKEND_GET_CLASS(uc
);
85 bc
->alloc(backend
, errp
);
90 host_memory_backend_class_init(ObjectClass
*oc
, void *data
)
92 UserCreatableClass
*ucc
= USER_CREATABLE_CLASS(oc
);
94 ucc
->complete
= host_memory_backend_memory_complete
;
97 static const TypeInfo host_memory_backend_info
= {
98 .name
= TYPE_MEMORY_BACKEND
,
99 .parent
= TYPE_OBJECT
,
101 .class_size
= sizeof(HostMemoryBackendClass
),
102 .class_init
= host_memory_backend_class_init
,
103 .instance_size
= sizeof(HostMemoryBackend
),
104 .instance_init
= host_memory_backend_init
,
105 .instance_finalize
= host_memory_backend_finalize
,
106 .interfaces
= (InterfaceInfo
[]) {
107 { TYPE_USER_CREATABLE
},
112 static void register_types(void)
114 type_register_static(&host_memory_backend_info
);
117 type_init(register_types
);