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
  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#define TYPE_MEMORY_BACKEND_RAM "memory-backend-ram"
  20
  21static void
  22ram_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
  23{
  24    char *name;
  25
  26    if (!backend->size) {
  27        error_setg(errp, "can't create backend with size 0");
  28        return;
  29    }
  30
  31    name = host_memory_backend_get_name(backend);
  32    memory_region_init_ram_shared_nomigrate(&backend->mr, OBJECT(backend), name,
  33                           backend->size, backend->share, errp);
  34    g_free(name);
  35}
  36
  37static void
  38ram_backend_class_init(ObjectClass *oc, void *data)
  39{
  40    HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
  41
  42    bc->alloc = ram_backend_memory_alloc;
  43}
  44
  45static const TypeInfo ram_backend_info = {
  46    .name = TYPE_MEMORY_BACKEND_RAM,
  47    .parent = TYPE_MEMORY_BACKEND,
  48    .class_init = ram_backend_class_init,
  49};
  50
  51static void register_types(void)
  52{
  53    type_register_static(&ram_backend_info);
  54}
  55
  56type_init(register_types);
  57