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 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 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 63 bool host_memory_backend_mr_inited(HostMemoryBackend *backend); 64 MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend); 65 66 void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped); 67 bool host_memory_backend_is_mapped(HostMemoryBackend *backend); 68 size_t host_memory_backend_pagesize(HostMemoryBackend *memdev); 69 char *host_memory_backend_get_name(HostMemoryBackend *backend); 70 71 #endif 72