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; 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 71