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
  19static void
  20ram_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
  21{
  22    char *name;
  23
  24    if (!backend->size) {
  25        error_setg(errp, "can't create backend with size 0");
  26        return;
  27    }
  28
  29    name = host_memory_backend_get_name(backend);
  30    memory_region_init_ram_shared_nomigrate(&backend->mr, OBJECT(backend), name,
  31                           backend->size, backend->share, errp);
  32    g_free(name);
  33}
  34
  35static void
  36ram_backend_class_init(ObjectClass *oc, void *data)
  37{
  38    HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
  39
  40    bc->alloc = ram_backend_memory_alloc;
  41}
  42
  43static const TypeInfo ram_backend_info = {
  44    .name = TYPE_MEMORY_BACKEND_RAM,
  45    .parent = TYPE_MEMORY_BACKEND,
  46    .class_init = ram_backend_class_init,
  47};
  48
  49static void register_types(void)
  50{
  51    type_register_static(&ram_backend_info);
  52}
  53
  54type_init(register_types);
  55