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 "qom/object.h"
  18 #include "exec/memory.h"
  19 #include "qemu/bitmap.h"
  20
  21 #define TYPE_MEMORY_BACKEND "memory-backend"
  22 #define MEMORY_BACKEND(obj) \
  23     OBJECT_CHECK(HostMemoryBackend, (obj), TYPE_MEMORY_BACKEND)
  24 #define MEMORY_BACKEND_GET_CLASS(obj) \
  25     OBJECT_GET_CLASS(HostMemoryBackendClass, (obj), TYPE_MEMORY_BACKEND)
  26 #define MEMORY_BACKEND_CLASS(klass) \
  27     OBJECT_CLASS_CHECK(HostMemoryBackendClass, (klass), TYPE_MEMORY_BACKEND)
  28
  29 typedef struct HostMemoryBackend HostMemoryBackend;
  30 typedef struct HostMemoryBackendClass HostMemoryBackendClass;
  31
  32 /**
  33  * HostMemoryBackendClass:
  34  * @parent_class: opaque parent class container
  35  */
  36 struct 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  */
  49 struct HostMemoryBackend {
  50     /* private */
  51     Object parent;
  52
  53     /* protected */
  54     char *id;
  55     uint64_t size;
  56     bool merge, dump;
  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
  64 bool host_memory_backend_mr_inited(HostMemoryBackend *backend);
  65 MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend,
  66                                              Error **errp);
  67
  68 void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped);
  69 bool host_memory_backend_is_mapped(HostMemoryBackend *backend);
  70 #endif