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 "sysemu/sysemu.h" /* for MAX_NODES */ 16 #include "qom/object.h" 17 #include "qapi/error.h" 18 #include "exec/memory.h" 19 #include "qemu/option.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 * @id: unique identification string in memdev namespace 49 * @mr: MemoryRegion representing host memory belonging to backend 50 */ 51 struct HostMemoryBackend { 52 /* private */ 53 Object parent; 54 55 /* protected */ 56 uint64_t size; 57 bool merge, dump; 58 bool prealloc, force_prealloc; 59 DECLARE_BITMAP(host_nodes, MAX_NODES + 1); 60 HostMemPolicy policy; 61 62 MemoryRegion mr; 63 }; 64 65 MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend, 66 Error **errp); 67 68 #endif 69