LXR qemu/include/sysemu/hostmem.h

   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#ifndef SYSEMU_HOSTMEM_H
  14#define SYSEMU_HOSTMEM_H
  15
  16#include "sysemu/sysemu.h" /* for MAX_NODES */
  17#include "qapi/qapi-types-machine.h"
  18#include "qom/object.h"
  19#include "exec/memory.h"
  20#include "qemu/bitmap.h"
  21
  22#define TYPE_MEMORY_BACKEND "memory-backend"
  23#define MEMORY_BACKEND(obj) \
  24    OBJECT_CHECK(HostMemoryBackend, (obj), TYPE_MEMORY_BACKEND)
  25#define MEMORY_BACKEND_GET_CLASS(obj) \
  26    OBJECT_GET_CLASS(HostMemoryBackendClass, (obj), TYPE_MEMORY_BACKEND)
  27#define MEMORY_BACKEND_CLASS(klass) \
  28    OBJECT_CLASS_CHECK(HostMemoryBackendClass, (klass), TYPE_MEMORY_BACKEND)
  29
  30typedef struct HostMemoryBackend HostMemoryBackend;
  31typedef struct HostMemoryBackendClass HostMemoryBackendClass;
  32
  33/**
  34 * HostMemoryBackendClass:
  35 * @parent_class: opaque parent class container
  36 */
  37struct HostMemoryBackendClass {
  38    ObjectClass parent_class;
  39
  40    void (*alloc)(HostMemoryBackend *backend, Error **errp);
  41};
  42
  43/**
  44 * @HostMemoryBackend
  45 *
  46 * @parent: opaque parent object container
  47 * @size: amount of memory backend provides
  48 * @mr: MemoryRegion representing host memory belonging to backend
  49 */
  50struct HostMemoryBackend {
  51    /* private */
  52    Object parent;
  53
  54    /* protected */
  55    uint64_t size;
  56    bool merge, dump, use_canonical_path;
  57    bool prealloc, force_prealloc, is_mapped, share;
  58    DECLARE_BITMAP(host_nodes, MAX_NODES + 1);
  59    HostMemPolicy policy;
  60
  61    MemoryRegion mr;
  62};
  63
  64bool host_memory_backend_mr_inited(HostMemoryBackend *backend);
  65MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend);
  66
  67void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped);
  68bool host_memory_backend_is_mapped(HostMemoryBackend *backend);
  69size_t host_memory_backend_pagesize(HostMemoryBackend *memdev);
  70char *host_memory_backend_get_name(HostMemoryBackend *backend);
  71
  72#endif
  73