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 "qemu/osdep.h" 13 #include "sysemu/hostmem.h" 14 #include "qapi/error.h" 15 #include "qom/object_interfaces.h" 16 17 #define TYPE_MEMORY_BACKEND_RAM "memory-backend-ram" 18 19 20 static void 21 ram_backend_memory_alloc(HostMemoryBackend *backend, Error **errp) 22 { 23 char *path; 24 25 if (!backend->size) { 26 error_setg(errp, "can't create backend with size 0"); 27 return; 28 } 29 30 path = object_get_canonical_path_component(OBJECT(backend)); 31 memory_region_init_ram_nomigrate(&backend->mr, OBJECT(backend), path, 32 backend->size, errp); 33 g_free(path); 34 } 35 36 static void 37 ram_backend_class_init(ObjectClass *oc, void *data) 38 { 39 HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc); 40 41 bc->alloc = ram_backend_memory_alloc; 42 } 43 44 static const TypeInfo ram_backend_info = { 45 .name = TYPE_MEMORY_BACKEND_RAM, 46 .parent = TYPE_MEMORY_BACKEND, 47 .class_init = ram_backend_class_init, 48 }; 49 50 static void register_types(void) 51 { 52 type_register_static(&ram_backend_info); 53 } 54 55 type_init(register_types); 56