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/numa.h"
  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 HostMemoryBackendClass HostMemoryBackendClass;
  31
  32/**
  33 * HostMemoryBackendClass:
  34 * @parent_class: opaque parent class container
  35 */
  36struct HostMemoryBackendClass {
  37    ObjectClass parent_class;
  38
  39    void (*alloc)(HostMemoryBackend *backend, Error **errp);
  40};
  41
  42/**
  43 * @HostMemoryBackend
  44 *
  45 * @parent: opaque parent object container
  46 * @size: amount of memory backend provides
  47 * @mr: MemoryRegion representing host memory belonging to backend
  48 */
  49struct HostMemoryBackend {
  50    /* private */
  51    Object parent;
  52
  53    /* protected */
  54    uint64_t size;
  55    bool merge, dump, use_canonical_path;
  56    bool prealloc, force_prealloc, is_mapped, share;
  57    DECLARE_BITMAP(host_nodes, MAX_NODES + 1);
  58    HostMemPolicy policy;
  59
  60    MemoryRegion mr;
  61};
  62
  63bool host_memory_backend_mr_inited(HostMemoryBackend *backend);
  64MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend);
  65
  66void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped);
  67bool host_memory_backend_is_mapped(HostMemoryBackend *backend);
  68size_t host_memory_backend_pagesize(HostMemoryBackend *memdev);
  69char *host_memory_backend_get_name(HostMemoryBackend *backend);
  70
  71#endif
  72