1 /* 2 * QEMU memory mapping 3 * 4 * Copyright Fujitsu, Corp. 2011, 2012 5 * 6 * Authors: 7 * Wen Congyang <wency@cn.fujitsu.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 14 #ifndef MEMORY_MAPPING_H 15 #define MEMORY_MAPPING_H 16 17 #include "qemu/queue.h" 18 #include "exec/cpu-common.h" 19 20 typedef struct GuestPhysBlock { 21 /* visible to guest, reflects PCI hole, etc */ 22 hwaddr target_start; 23 24 /* implies size */ 25 hwaddr target_end; 26 27 /* points into host memory */ 28 uint8_t *host_addr; 29 30 /* points to the MemoryRegion that this block belongs to */ 31 MemoryRegion *mr; 32 33 QTAILQ_ENTRY(GuestPhysBlock) next; 34 } GuestPhysBlock; 35 36 /* point-in-time snapshot of guest-visible physical mappings */ 37 typedef struct GuestPhysBlockList { 38 unsigned num; 39 QTAILQ_HEAD(, GuestPhysBlock) head; 40 } GuestPhysBlockList; 41 42 /* The physical and virtual address in the memory mapping are contiguous. */ 43 typedef struct MemoryMapping { 44 hwaddr phys_addr; 45 vaddr virt_addr; 46 ram_addr_t length; 47 QTAILQ_ENTRY(MemoryMapping) next; 48 } MemoryMapping; 49 50 struct MemoryMappingList { 51 unsigned int num; 52 MemoryMapping *last_mapping; 53 QTAILQ_HEAD(, MemoryMapping) head; 54 }; 55 56 /* 57 * add or merge the memory region [phys_addr, phys_addr + length) into the 58 * memory mapping's list. The region's virtual address starts with virt_addr, 59 * and is contiguous. The list is sorted by phys_addr. 60 */ 61 void memory_mapping_list_add_merge_sorted(MemoryMappingList *list, 62 hwaddr phys_addr, 63 hwaddr virt_addr, 64 ram_addr_t length); 65 66 void memory_mapping_list_free(MemoryMappingList *list); 67 68 void memory_mapping_list_init(MemoryMappingList *list); 69 70 void guest_phys_blocks_free(GuestPhysBlockList *list); 71 void guest_phys_blocks_init(GuestPhysBlockList *list); 72 void guest_phys_blocks_append(GuestPhysBlockList *list); 73 74 bool qemu_get_guest_memory_mapping(MemoryMappingList *list, 75 const GuestPhysBlockList *guest_phys_blocks, 76 Error **errp); 77 78 /* get guest's memory mapping without do paging(virtual address is 0). */ 79 void qemu_get_guest_simple_memory_mapping(MemoryMappingList *list, 80 const GuestPhysBlockList *guest_phys_blocks); 81 82 void memory_mapping_filter(MemoryMappingList *list, int64_t begin, 83 int64_t length); 84 85 #endif 86