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 "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 HostMemoryBackend HostMemoryBackend; 31 typedef struct HostMemoryBackendClass HostMemoryBackendClass; 32 33 /** 34 * HostMemoryBackendClass: 35 * @parent_class: opaque parent class container 36 */ 37 struct HostMemoryBackendClass { 38 ObjectClass parent_class; 39 40 void (*alloc)(HostMemoryBackend *backend, Error **errp); 41 }; 42 43 /** 44 * @HostMemoryBackend 45 * 46 * @parent: opaque parent object container 47 * @size: amount of memory backend provides 48 * @mr: MemoryRegion representing host memory belonging to backend 49 */ 50 struct HostMemoryBackend { 51 /* private */ 52 Object parent; 53 54 /* protected */ 55 uint64_t size; 56 bool merge, dump, use_canonical_path; 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 67 void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped); 68 bool host_memory_backend_is_mapped(HostMemoryBackend *backend); 69 size_t host_memory_backend_pagesize(HostMemoryBackend *memdev); 70 char *host_memory_backend_get_name(HostMemoryBackend *backend); 71 72 #endif 73