blob: b8e55cdbd0f89078b01bb1575416173ce909526b [file] [log] [blame]
Igor Mammedov1f070482014-06-06 17:54:29 +02001/*
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 */
Markus Armbruster0b8fa322019-05-23 16:35:07 +020012
Peter Maydell9c058332016-01-29 17:49:54 +000013#include "qemu/osdep.h"
Igor Mammedov1f070482014-06-06 17:54:29 +020014#include "sysemu/hostmem.h"
Markus Armbrusterda34e652016-03-14 09:01:28 +010015#include "qapi/error.h"
Markus Armbruster0b8fa322019-05-23 16:35:07 +020016#include "qemu/module.h"
Igor Mammedov1f070482014-06-06 17:54:29 +020017#include "qom/object_interfaces.h"
18
Igor Mammedov1f070482014-06-06 17:54:29 +020019static void
Hu Taobd9262d2014-06-10 19:15:19 +080020ram_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
Igor Mammedov1f070482014-06-06 17:54:29 +020021{
David Hildenbrand7f863cb2021-05-10 13:43:18 +020022 uint32_t ram_flags;
Marc-André Lureaufa0cb342018-09-12 16:18:00 +040023 char *name;
Igor Mammedov1f070482014-06-06 17:54:29 +020024
25 if (!backend->size) {
26 error_setg(errp, "can't create backend with size 0");
27 return;
28 }
29
Marc-André Lureaufa0cb342018-09-12 16:18:00 +040030 name = host_memory_backend_get_name(backend);
David Hildenbrand7f863cb2021-05-10 13:43:18 +020031 ram_flags = backend->share ? RAM_SHARED : 0;
David Hildenbrand9181fb72021-05-10 13:43:23 +020032 ram_flags |= backend->reserve ? 0 : RAM_NORESERVE;
David Hildenbrand7f863cb2021-05-10 13:43:18 +020033 memory_region_init_ram_flags_nomigrate(&backend->mr, OBJECT(backend), name,
34 backend->size, ram_flags, errp);
Marc-André Lureaufa0cb342018-09-12 16:18:00 +040035 g_free(name);
Igor Mammedov1f070482014-06-06 17:54:29 +020036}
37
38static void
39ram_backend_class_init(ObjectClass *oc, void *data)
40{
Hu Taobd9262d2014-06-10 19:15:19 +080041 HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
Igor Mammedov1f070482014-06-06 17:54:29 +020042
Hu Taobd9262d2014-06-10 19:15:19 +080043 bc->alloc = ram_backend_memory_alloc;
Igor Mammedov1f070482014-06-06 17:54:29 +020044}
45
46static const TypeInfo ram_backend_info = {
47 .name = TYPE_MEMORY_BACKEND_RAM,
48 .parent = TYPE_MEMORY_BACKEND,
49 .class_init = ram_backend_class_init,
50};
51
52static void register_types(void)
53{
54 type_register_static(&ram_backend_info);
55}
56
57type_init(register_types);