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 "qom/object_interfaces.h" 14 15 #define TYPE_MEMORY_BACKEND_RAM "memory-backend-ram" 16 17 18 static void 19 ram_backend_memory_alloc(HostMemoryBackend *backend, Error **errp) 20 { 21 char *path; 22 23 if (!backend->size) { 24 error_setg(errp, "can't create backend with size 0"); 25 return; 26 } 27 28 path = object_get_canonical_path_component(OBJECT(backend)); 29 memory_region_init_ram(&backend->mr, OBJECT(backend), path, 30 backend->size); 31 g_free(path); 32 } 33 34 static void 35 ram_backend_class_init(ObjectClass *oc, void *data) 36 { 37 HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc); 38 39 bc->alloc = ram_backend_memory_alloc; 40 } 41 42 static const TypeInfo ram_backend_info = { 43 .name = TYPE_MEMORY_BACKEND_RAM, 44 .parent = TYPE_MEMORY_BACKEND, 45 .class_init = ram_backend_class_init, 46 }; 47 48 static void register_types(void) 49 { 50 type_register_static(&ram_backend_info); 51 } 52 53 type_init(register_types); 54