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 13 #include "qemu/osdep.h" 14 #include "sysemu/hostmem.h" 15 #include "qapi/error.h" 16 #include "qemu/module.h" 17 #include "qom/object_interfaces.h" 18 19 static bool 20 ram_backend_memory_alloc(HostMemoryBackend *backend, Error **errp) 21 { 22 g_autofree char *name = NULL; 23 uint32_t ram_flags; 24 25 if (!backend->size) { 26 error_setg(errp, "can't create backend with size 0"); 27 return false; 28 } 29 30 name = host_memory_backend_get_name(backend); 31 ram_flags = backend->share ? RAM_SHARED : 0; 32 ram_flags |= backend->reserve ? 0 : RAM_NORESERVE; 33 return memory_region_init_ram_flags_nomigrate(&backend->mr, OBJECT(backend), 34 name, backend->size, 35 ram_flags, errp); 36 } 37 38 static void 39 ram_backend_class_init(ObjectClass *oc, void *data) 40 { 41 HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc); 42 43 bc->alloc = ram_backend_memory_alloc; 44 } 45 46 static 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 52 static void register_types(void) 53 { 54 type_register_static(&ram_backend_info); 55 } 56 57 type_init(register_types); 58