LXR qemu/backends/hostmem-ram.c

   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
  20static void
  21ram_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(&backend->mr, OBJECT(backend), path,
  32                           backend->size, errp);
  33    g_free(path);
  34}
  35
  36static void
  37ram_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
  44static 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
  50static void register_types(void)
  51{
  52    type_register_static(&ram_backend_info);
  53}
  54
  55type_init(register_types);
  56