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
  19static void
  20ram_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
  21{
  22    uint32_t ram_flags;
  23    char *name;
  24
  25    if (!backend->size) {
  26        error_setg(errp, "can't create backend with size 0");
  27        return;
  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    memory_region_init_ram_flags_nomigrate(&backend->mr, OBJECT(backend), name,
  34                                           backend->size, ram_flags, errp);
  35    g_free(name);
  36}
  37
  38static void
  39ram_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
  46static 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
  52static void register_types(void)
  53{
  54    type_register_static(&ram_backend_info);
  55}
  56
  57type_init(register_types);
  58