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 #ifndef QEMU_RAM_H
  13 #define QEMU_RAM_H
  14
  15 #include "qom/object.h"
  16 #include "qapi/error.h"
  17 #include "exec/memory.h"
  18 #include "qemu/option.h"
  19
  20 #define TYPE_MEMORY_BACKEND "memory-backend"
  21 #define MEMORY_BACKEND(obj) \
  22     OBJECT_CHECK(HostMemoryBackend, (obj), TYPE_MEMORY_BACKEND)
  23 #define MEMORY_BACKEND_GET_CLASS(obj) \
  24     OBJECT_GET_CLASS(HostMemoryBackendClass, (obj), TYPE_MEMORY_BACKEND)
  25 #define MEMORY_BACKEND_CLASS(klass) \
  26     OBJECT_CLASS_CHECK(HostMemoryBackendClass, (klass), TYPE_MEMORY_BACKEND)
  27
  28 typedef struct HostMemoryBackend HostMemoryBackend;
  29 typedef struct HostMemoryBackendClass HostMemoryBackendClass;
  30
  31 /**
  32  * HostMemoryBackendClass:
  33  * @parent_class: opaque parent class container
  34  */
  35 struct HostMemoryBackendClass {
  36     ObjectClass parent_class;
  37
  38     void (*alloc)(HostMemoryBackend *backend, Error **errp);
  39 };
  40
  41 /**
  42  * @HostMemoryBackend
  43  *
  44  * @parent: opaque parent object container
  45  * @size: amount of memory backend provides
  46  * @id: unique identification string in memdev namespace
  47  * @mr: MemoryRegion representing host memory belonging to backend
  48  */
  49 struct HostMemoryBackend {
  50     /* private */
  51     Object parent;
  52
  53     /* protected */
  54     uint64_t size;
  55
  56     MemoryRegion mr;
  57 };
  58
  59 MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend,
  60                                              Error **errp);
  61
  62 #endif