1 /* 2 * Physical memory management API 3 * 4 * Copyright 2011 Red Hat, Inc. and/or its affiliates 5 * 6 * Authors: 7 * Avi Kivity <avi@redhat.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 * 12 */ 13 14 #ifndef MEMORY_H 15 #define MEMORY_H 16 17 #ifndef CONFIG_USER_ONLY 18 19 #define DIRTY_MEMORY_VGA 0 20 #define DIRTY_MEMORY_CODE 1 21 #define DIRTY_MEMORY_MIGRATION 2 22 #define DIRTY_MEMORY_NUM 3 /* num of dirty bits */ 23 24 #include <stdint.h> 25 #include <stdbool.h> 26 #include "qemu-common.h" 27 #include "exec/cpu-common.h" 28 #ifndef CONFIG_USER_ONLY 29 #include "exec/hwaddr.h" 30 #endif 31 #include "exec/memattrs.h" 32 #include "qemu/queue.h" 33 #include "qemu/int128.h" 34 #include "qemu/notify.h" 35 #include "qapi/error.h" 36 #include "qom/object.h" 37 #include "qemu/rcu.h" 38 39 #define MAX_PHYS_ADDR_SPACE_BITS 62 40 #define MAX_PHYS_ADDR (((hwaddr)1 << MAX_PHYS_ADDR_SPACE_BITS) - 1) 41 42 #define TYPE_MEMORY_REGION "qemu:memory-region" 43 #define MEMORY_REGION(obj) \ 44 OBJECT_CHECK(MemoryRegion, (obj), TYPE_MEMORY_REGION) 45 46 typedef struct MemoryRegionOps MemoryRegionOps; 47 typedef struct MemoryRegionMmio MemoryRegionMmio; 48 49 struct MemoryRegionMmio { 50 CPUReadMemoryFunc *read[3]; 51 CPUWriteMemoryFunc *write[3]; 52 }; 53 54 typedef struct IOMMUTLBEntry IOMMUTLBEntry; 55 56 /* See address_space_translate: bit 0 is read, bit 1 is write. */ 57 typedef enum { 58 IOMMU_NONE = 0, 59 IOMMU_RO = 1, 60 IOMMU_WO = 2, 61 IOMMU_RW = 3, 62 } IOMMUAccessFlags; 63 64 struct IOMMUTLBEntry { 65 AddressSpace *target_as; 66 hwaddr iova; 67 hwaddr translated_addr; 68 hwaddr addr_mask; /* 0xfff = 4k translation */ 69 IOMMUAccessFlags perm; 70 }; 71 72 /* New-style MMIO accessors can indicate that the transaction failed. 73 * A zero (MEMTX_OK) response means success; anything else is a failure 74 * of some kind. The memory subsystem will bitwise-OR together results 75 * if it is synthesizing an operation from multiple smaller accesses. 76 */ 77 #define MEMTX_OK 0 78 #define MEMTX_ERROR (1U << 0) /* device returned an error */ 79 #define MEMTX_DECODE_ERROR (1U << 1) /* nothing at that address */ 80 typedef uint32_t MemTxResult; 81 82 /* 83 * Memory region callbacks 84 */ 85 struct MemoryRegionOps { 86 /* Read from the memory region. @addr is relative to @mr; @size is 87 * in bytes. */ 88 uint64_t (*read)(void *opaque, 89 hwaddr addr, 90 unsigned size); 91 /* Write to the memory region. @addr is relative to @mr; @size is 92 * in bytes. */ 93 void (*write)(void *opaque, 94 hwaddr addr, 95 uint64_t data, 96 unsigned size); 97 98 MemTxResult (*read_with_attrs)(void *opaque, 99 hwaddr addr, 100 uint64_t *data, 101 unsigned size, 102 MemTxAttrs attrs); 103 MemTxResult (*write_with_attrs)(void *opaque, 104 hwaddr addr, 105 uint64_t data, 106 unsigned size, 107 MemTxAttrs attrs); 108 109 enum device_endian endianness; 110 /* Guest-visible constraints: */ 111 struct { 112 /* If nonzero, specify bounds on access sizes beyond which a machine 113 * check is thrown. 114 */ 115 unsigned min_access_size; 116 unsigned max_access_size; 117 /* If true, unaligned accesses are supported. Otherwise unaligned 118 * accesses throw machine checks. 119 */ 120 bool unaligned; 121 /* 122 * If present, and returns #false, the transaction is not accepted 123 * by the device (and results in machine dependent behaviour such 124 * as a machine check exception). 125 */ 126 bool (*accepts)(void *opaque, hwaddr addr, 127 unsigned size, bool is_write); 128 } valid; 129 /* Internal implementation constraints: */ 130 struct { 131 /* If nonzero, specifies the minimum size implemented. Smaller sizes 132 * will be rounded upwards and a partial result will be returned. 133 */ 134 unsigned min_access_size; 135 /* If nonzero, specifies the maximum size implemented. Larger sizes 136 * will be done as a series of accesses with smaller sizes. 137 */ 138 unsigned max_access_size; 139 /* If true, unaligned accesses are supported. Otherwise all accesses 140 * are converted to (possibly multiple) naturally aligned accesses. 141 */ 142 bool unaligned; 143 } impl; 144 145 /* If .read and .write are not present, old_mmio may be used for 146 * backwards compatibility with old mmio registration 147 */ 148 const MemoryRegionMmio old_mmio; 149 }; 150 151 typedef struct MemoryRegionIOMMUOps MemoryRegionIOMMUOps; 152 153 struct MemoryRegionIOMMUOps { 154 /* Return a TLB entry that contains a given address. */ 155 IOMMUTLBEntry (*translate)(MemoryRegion *iommu, hwaddr addr, bool is_write); 156 }; 157 158 typedef struct CoalescedMemoryRange CoalescedMemoryRange; 159 typedef struct MemoryRegionIoeventfd MemoryRegionIoeventfd; 160 161 struct MemoryRegion { 162 Object parent_obj; 163 /* All fields are private - violators will be prosecuted */ 164 const MemoryRegionOps *ops; 165 const MemoryRegionIOMMUOps *iommu_ops; 166 void *opaque; 167 MemoryRegion *container; 168 Int128 size; 169 hwaddr addr; 170 void (*destructor)(MemoryRegion *mr); 171 ram_addr_t ram_addr; 172 uint64_t align; 173 bool subpage; 174 bool terminates; 175 bool romd_mode; 176 bool ram; 177 bool skip_dump; 178 bool readonly; /* For RAM regions */ 179 bool enabled; 180 bool rom_device; 181 bool warning_printed; /* For reservations */ 182 bool flush_coalesced_mmio; 183 MemoryRegion *alias; 184 hwaddr alias_offset; 185 int32_t priority; 186 bool may_overlap; 187 QTAILQ_HEAD(subregions, MemoryRegion) subregions; 188 QTAILQ_ENTRY(MemoryRegion) subregions_link; 189 QTAILQ_HEAD(coalesced_ranges, CoalescedMemoryRange) coalesced; 190 const char *name; 191 uint8_t dirty_log_mask; 192 unsigned ioeventfd_nb; 193 MemoryRegionIoeventfd *ioeventfds; 194 NotifierList iommu_notify; 195 }; 196 197 /** 198 * MemoryListener: callbacks structure for updates to the physical memory map 199 * 200 * Allows a component to adjust to changes in the guest-visible memory map. 201 * Use with memory_listener_register() and memory_listener_unregister(). 202 */ 203 struct MemoryListener { 204 void (*begin)(MemoryListener *listener); 205 void (*commit)(MemoryListener *listener); 206 void (*region_add)(MemoryListener *listener, MemoryRegionSection *section); 207 void (*region_del)(MemoryListener *listener, MemoryRegionSection *section); 208 void (*region_nop)(MemoryListener *listener, MemoryRegionSection *section); 209 void (*log_start)(MemoryListener *listener, MemoryRegionSection *section, 210 int old, int new); 211 void (*log_stop)(MemoryListener *listener, MemoryRegionSection *section, 212 int old, int new); 213 void (*log_sync)(MemoryListener *listener, MemoryRegionSection *section); 214 void (*log_global_start)(MemoryListener *listener); 215 void (*log_global_stop)(MemoryListener *listener); 216 void (*eventfd_add)(MemoryListener *listener, MemoryRegionSection *section, 217 bool match_data, uint64_t data, EventNotifier *e); 218 void (*eventfd_del)(MemoryListener *listener, MemoryRegionSection *section, 219 bool match_data, uint64_t data, EventNotifier *e); 220 void (*coalesced_mmio_add)(MemoryListener *listener, MemoryRegionSection *section, 221 hwaddr addr, hwaddr len); 222 void (*coalesced_mmio_del)(MemoryListener *listener, MemoryRegionSection *section, 223 hwaddr addr, hwaddr len); 224 /* Lower = earlier (during add), later (during del) */ 225 unsigned priority; 226 AddressSpace *address_space_filter; 227 QTAILQ_ENTRY(MemoryListener) link; 228 }; 229 230 /** 231 * AddressSpace: describes a mapping of addresses to #MemoryRegion objects 232 */ 233 struct AddressSpace { 234 /* All fields are private. */ 235 struct rcu_head rcu; 236 char *name; 237 MemoryRegion *root; 238 239 /* Accessed via RCU. */ 240 struct FlatView *current_map; 241 242 int ioeventfd_nb; 243 struct MemoryRegionIoeventfd *ioeventfds; 244 struct AddressSpaceDispatch *dispatch; 245 struct AddressSpaceDispatch *next_dispatch; 246 MemoryListener dispatch_listener; 247 248 QTAILQ_ENTRY(AddressSpace) address_spaces_link; 249 }; 250 251 /** 252 * MemoryRegionSection: describes a fragment of a #MemoryRegion 253 * 254 * @mr: the region, or %NULL if empty 255 * @address_space: the address space the region is mapped in 256 * @offset_within_region: the beginning of the section, relative to @mr's start 257 * @size: the size of the section; will not exceed @mr's boundaries 258 * @offset_within_address_space: the address of the first byte of the section 259 * relative to the region's address space 260 * @readonly: writes to this section are ignored 261 */ 262 struct MemoryRegionSection { 263 MemoryRegion *mr; 264 AddressSpace *address_space; 265 hwaddr offset_within_region; 266 Int128 size; 267 hwaddr offset_within_address_space; 268 bool readonly; 269 }; 270 271 /** 272 * memory_region_init: Initialize a memory region 273 * 274 * The region typically acts as a container for other memory regions. Use 275 * memory_region_add_subregion() to add subregions. 276 * 277 * @mr: the #MemoryRegion to be initialized 278 * @owner: the object that tracks the region's reference count 279 * @name: used for debugging; not visible to the user or ABI 280 * @size: size of the region; any subregions beyond this size will be clipped 281 */ 282 void memory_region_init(MemoryRegion *mr, 283 struct Object *owner, 284 const char *name, 285 uint64_t size); 286 287 /** 288 * memory_region_ref: Add 1 to a memory region's reference count 289 * 290 * Whenever memory regions are accessed outside the BQL, they need to be 291 * preserved against hot-unplug. MemoryRegions actually do not have their 292 * own reference count; they piggyback on a QOM object, their "owner". 293 * This function adds a reference to the owner. 294 * 295 * All MemoryRegions must have an owner if they can disappear, even if the 296 * device they belong to operates exclusively under the BQL. This is because 297 * the region could be returned at any time by memory_region_find, and this 298 * is usually under guest control. 299 * 300 * @mr: the #MemoryRegion 301 */ 302 void memory_region_ref(MemoryRegion *mr); 303 304 /** 305 * memory_region_unref: Remove 1 to a memory region's reference count 306 * 307 * Whenever memory regions are accessed outside the BQL, they need to be 308 * preserved against hot-unplug. MemoryRegions actually do not have their 309 * own reference count; they piggyback on a QOM object, their "owner". 310 * This function removes a reference to the owner and possibly destroys it. 311 * 312 * @mr: the #MemoryRegion 313 */ 314 void memory_region_unref(MemoryRegion *mr); 315 316 /** 317 * memory_region_init_io: Initialize an I/O memory region. 318 * 319 * Accesses into the region will cause the callbacks in @ops to be called. 320 * if @size is nonzero, subregions will be clipped to @size. 321 * 322 * @mr: the #MemoryRegion to be initialized. 323 * @owner: the object that tracks the region's reference count 324 * @ops: a structure containing read and write callbacks to be used when 325 * I/O is performed on the region. 326 * @opaque: passed to to the read and write callbacks of the @ops structure. 327 * @name: used for debugging; not visible to the user or ABI 328 * @size: size of the region. 329 */ 330 void memory_region_init_io(MemoryRegion *mr, 331 struct Object *owner, 332 const MemoryRegionOps *ops, 333 void *opaque, 334 const char *name, 335 uint64_t size); 336 337 /** 338 * memory_region_init_ram: Initialize RAM memory region. Accesses into the 339 * region will modify memory directly. 340 * 341 * @mr: the #MemoryRegion to be initialized. 342 * @owner: the object that tracks the region's reference count 343 * @name: the name of the region. 344 * @size: size of the region. 345 * @errp: pointer to Error*, to store an error if it happens. 346 */ 347 void memory_region_init_ram(MemoryRegion *mr, 348 struct Object *owner, 349 const char *name, 350 uint64_t size, 351 Error **errp); 352 353 /** 354 * memory_region_init_resizeable_ram: Initialize memory region with resizeable 355 * RAM. Accesses into the region will 356 * modify memory directly. Only an initial 357 * portion of this RAM is actually used. 358 * The used size can change across reboots. 359 * 360 * @mr: the #MemoryRegion to be initialized. 361 * @owner: the object that tracks the region's reference count 362 * @name: the name of the region. 363 * @size: used size of the region. 364 * @max_size: max size of the region. 365 * @resized: callback to notify owner about used size change. 366 * @errp: pointer to Error*, to store an error if it happens. 367 */ 368 void memory_region_init_resizeable_ram(MemoryRegion *mr, 369 struct Object *owner, 370 const char *name, 371 uint64_t size, 372 uint64_t max_size, 373 void (*resized)(const char*, 374 uint64_t length, 375 void *host), 376 Error **errp); 377 #ifdef __linux__ 378 /** 379 * memory_region_init_ram_from_file: Initialize RAM memory region with a 380 * mmap-ed backend. 381 * 382 * @mr: the #MemoryRegion to be initialized. 383 * @owner: the object that tracks the region's reference count 384 * @name: the name of the region. 385 * @size: size of the region. 386 * @share: %true if memory must be mmaped with the MAP_SHARED flag 387 * @path: the path in which to allocate the RAM. 388 * @errp: pointer to Error*, to store an error if it happens. 389 */ 390 void memory_region_init_ram_from_file(MemoryRegion *mr, 391 struct Object *owner, 392 const char *name, 393 uint64_t size, 394 bool share, 395 const char *path, 396 Error **errp); 397 #endif 398 399 /** 400 * memory_region_init_ram_ptr: Initialize RAM memory region from a 401 * user-provided pointer. Accesses into the 402 * region will modify memory directly. 403 * 404 * @mr: the #MemoryRegion to be initialized. 405 * @owner: the object that tracks the region's reference count 406 * @name: the name of the region. 407 * @size: size of the region. 408 * @ptr: memory to be mapped; must contain at least @size bytes. 409 */ 410 void memory_region_init_ram_ptr(MemoryRegion *mr, 411 struct Object *owner, 412 const char *name, 413 uint64_t size, 414 void *ptr); 415 416 /** 417 * memory_region_init_alias: Initialize a memory region that aliases all or a 418 * part of another memory region. 419 * 420 * @mr: the #MemoryRegion to be initialized. 421 * @owner: the object that tracks the region's reference count 422 * @name: used for debugging; not visible to the user or ABI 423 * @orig: the region to be referenced; @mr will be equivalent to 424 * @orig between @offset and @offset + @size - 1. 425 * @offset: start of the section in @orig to be referenced. 426 * @size: size of the region. 427 */ 428 void memory_region_init_alias(MemoryRegion *mr, 429 struct Object *owner, 430 const char *name, 431 MemoryRegion *orig, 432 hwaddr offset, 433 uint64_t size); 434 435 /** 436 * memory_region_init_rom_device: Initialize a ROM memory region. Writes are 437 * handled via callbacks. 438 * 439 * @mr: the #MemoryRegion to be initialized. 440 * @owner: the object that tracks the region's reference count 441 * @ops: callbacks for write access handling. 442 * @name: the name of the region. 443 * @size: size of the region. 444 * @errp: pointer to Error*, to store an error if it happens. 445 */ 446 void memory_region_init_rom_device(MemoryRegion *mr, 447 struct Object *owner, 448 const MemoryRegionOps *ops, 449 void *opaque, 450 const char *name, 451 uint64_t size, 452 Error **errp); 453 454 /** 455 * memory_region_init_reservation: Initialize a memory region that reserves 456 * I/O space. 457 * 458 * A reservation region primariy serves debugging purposes. It claims I/O 459 * space that is not supposed to be handled by QEMU itself. Any access via 460 * the memory API will cause an abort(). 461 * 462 * @mr: the #MemoryRegion to be initialized 463 * @owner: the object that tracks the region's reference count 464 * @name: used for debugging; not visible to the user or ABI 465 * @size: size of the region. 466 */ 467 void memory_region_init_reservation(MemoryRegion *mr, 468 struct Object *owner, 469 const char *name, 470 uint64_t size); 471 472 /** 473 * memory_region_init_iommu: Initialize a memory region that translates 474 * addresses 475 * 476 * An IOMMU region translates addresses and forwards accesses to a target 477 * memory region. 478 * 479 * @mr: the #MemoryRegion to be initialized 480 * @owner: the object that tracks the region's reference count 481 * @ops: a function that translates addresses into the @target region 482 * @name: used for debugging; not visible to the user or ABI 483 * @size: size of the region. 484 */ 485 void memory_region_init_iommu(MemoryRegion *mr, 486 struct Object *owner, 487 const MemoryRegionIOMMUOps *ops, 488 const char *name, 489 uint64_t size); 490 491 /** 492 * memory_region_owner: get a memory region's owner. 493 * 494 * @mr: the memory region being queried. 495 */ 496 struct Object *memory_region_owner(MemoryRegion *mr); 497 498 /** 499 * memory_region_size: get a memory region's size. 500 * 501 * @mr: the memory region being queried. 502 */ 503 uint64_t memory_region_size(MemoryRegion *mr); 504 505 /** 506 * memory_region_is_ram: check whether a memory region is random access 507 * 508 * Returns %true is a memory region is random access. 509 * 510 * @mr: the memory region being queried 511 */ 512 bool memory_region_is_ram(MemoryRegion *mr); 513 514 /** 515 * memory_region_is_skip_dump: check whether a memory region should not be 516 * dumped 517 * 518 * Returns %true is a memory region should not be dumped(e.g. VFIO BAR MMAP). 519 * 520 * @mr: the memory region being queried 521 */ 522 bool memory_region_is_skip_dump(MemoryRegion *mr); 523 524 /** 525 * memory_region_set_skip_dump: Set skip_dump flag, dump will ignore this memory 526 * region 527 * 528 * @mr: the memory region being queried 529 */ 530 void memory_region_set_skip_dump(MemoryRegion *mr); 531 532 /** 533 * memory_region_is_romd: check whether a memory region is in ROMD mode 534 * 535 * Returns %true if a memory region is a ROM device and currently set to allow 536 * direct reads. 537 * 538 * @mr: the memory region being queried 539 */ 540 static inline bool memory_region_is_romd(MemoryRegion *mr) 541 { 542 return mr->rom_device && mr->romd_mode; 543 } 544 545 /** 546 * memory_region_is_iommu: check whether a memory region is an iommu 547 * 548 * Returns %true is a memory region is an iommu. 549 * 550 * @mr: the memory region being queried 551 */ 552 bool memory_region_is_iommu(MemoryRegion *mr); 553 554 /** 555 * memory_region_notify_iommu: notify a change in an IOMMU translation entry. 556 * 557 * @mr: the memory region that was changed 558 * @entry: the new entry in the IOMMU translation table. The entry 559 * replaces all old entries for the same virtual I/O address range. 560 * Deleted entries have .@perm == 0. 561 */ 562 void memory_region_notify_iommu(MemoryRegion *mr, 563 IOMMUTLBEntry entry); 564 565 /** 566 * memory_region_register_iommu_notifier: register a notifier for changes to 567 * IOMMU translation entries. 568 * 569 * @mr: the memory region to observe 570 * @n: the notifier to be added; the notifier receives a pointer to an 571 * #IOMMUTLBEntry as the opaque value; the pointer ceases to be 572 * valid on exit from the notifier. 573 */ 574 void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n); 575 576 /** 577 * memory_region_unregister_iommu_notifier: unregister a notifier for 578 * changes to IOMMU translation entries. 579 * 580 * @n: the notifier to be removed. 581 */ 582 void memory_region_unregister_iommu_notifier(Notifier *n); 583 584 /** 585 * memory_region_name: get a memory region's name 586 * 587 * Returns the string that was used to initialize the memory region. 588 * 589 * @mr: the memory region being queried 590 */ 591 const char *memory_region_name(const MemoryRegion *mr); 592 593 /** 594 * memory_region_is_logging: return whether a memory region is logging writes 595 * 596 * Returns %true if the memory region is logging writes for the given client 597 * 598 * @mr: the memory region being queried 599 * @client: the client being queried 600 */ 601 bool memory_region_is_logging(MemoryRegion *mr, uint8_t client); 602 603 /** 604 * memory_region_get_dirty_log_mask: return the clients for which a 605 * memory region is logging writes. 606 * 607 * Returns a bitmap of clients, in which the DIRTY_MEMORY_* constants 608 * are the bit indices. 609 * 610 * @mr: the memory region being queried 611 */ 612 uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr); 613 614 /** 615 * memory_region_is_rom: check whether a memory region is ROM 616 * 617 * Returns %true is a memory region is read-only memory. 618 * 619 * @mr: the memory region being queried 620 */ 621 bool memory_region_is_rom(MemoryRegion *mr); 622 623 /** 624 * memory_region_get_fd: Get a file descriptor backing a RAM memory region. 625 * 626 * Returns a file descriptor backing a file-based RAM memory region, 627 * or -1 if the region is not a file-based RAM memory region. 628 * 629 * @mr: the RAM or alias memory region being queried. 630 */ 631 int memory_region_get_fd(MemoryRegion *mr); 632 633 /** 634 * memory_region_get_ram_ptr: Get a pointer into a RAM memory region. 635 * 636 * Returns a host pointer to a RAM memory region (created with 637 * memory_region_init_ram() or memory_region_init_ram_ptr()). Use with 638 * care. 639 * 640 * @mr: the memory region being queried. 641 */ 642 void *memory_region_get_ram_ptr(MemoryRegion *mr); 643 644 /* memory_region_ram_resize: Resize a RAM region. 645 * 646 * Only legal before guest might have detected the memory size: e.g. on 647 * incoming migration, or right after reset. 648 * 649 * @mr: a memory region created with @memory_region_init_resizeable_ram. 650 * @newsize: the new size the region 651 * @errp: pointer to Error*, to store an error if it happens. 652 */ 653 void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, 654 Error **errp); 655 656 /** 657 * memory_region_set_log: Turn dirty logging on or off for a region. 658 * 659 * Turns dirty logging on or off for a specified client (display, migration). 660 * Only meaningful for RAM regions. 661 * 662 * @mr: the memory region being updated. 663 * @log: whether dirty logging is to be enabled or disabled. 664 * @client: the user of the logging information; %DIRTY_MEMORY_VGA only. 665 */ 666 void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client); 667 668 /** 669 * memory_region_get_dirty: Check whether a range of bytes is dirty 670 * for a specified client. 671 * 672 * Checks whether a range of bytes has been written to since the last 673 * call to memory_region_reset_dirty() with the same @client. Dirty logging 674 * must be enabled. 675 * 676 * @mr: the memory region being queried. 677 * @addr: the address (relative to the start of the region) being queried. 678 * @size: the size of the range being queried. 679 * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or 680 * %DIRTY_MEMORY_VGA. 681 */ 682 bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr, 683 hwaddr size, unsigned client); 684 685 /** 686 * memory_region_set_dirty: Mark a range of bytes as dirty in a memory region. 687 * 688 * Marks a range of bytes as dirty, after it has been dirtied outside 689 * guest code. 690 * 691 * @mr: the memory region being dirtied. 692 * @addr: the address (relative to the start of the region) being dirtied. 693 * @size: size of the range being dirtied. 694 */ 695 void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr, 696 hwaddr size); 697 698 /** 699 * memory_region_test_and_clear_dirty: Check whether a range of bytes is dirty 700 * for a specified client. It clears them. 701 * 702 * Checks whether a range of bytes has been written to since the last 703 * call to memory_region_reset_dirty() with the same @client. Dirty logging 704 * must be enabled. 705 * 706 * @mr: the memory region being queried. 707 * @addr: the address (relative to the start of the region) being queried. 708 * @size: the size of the range being queried. 709 * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or 710 * %DIRTY_MEMORY_VGA. 711 */ 712 bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr, 713 hwaddr size, unsigned client); 714 /** 715 * memory_region_sync_dirty_bitmap: Synchronize a region's dirty bitmap with 716 * any external TLBs (e.g. kvm) 717 * 718 * Flushes dirty information from accelerators such as kvm and vhost-net 719 * and makes it available to users of the memory API. 720 * 721 * @mr: the region being flushed. 722 */ 723 void memory_region_sync_dirty_bitmap(MemoryRegion *mr); 724 725 /** 726 * memory_region_reset_dirty: Mark a range of pages as clean, for a specified 727 * client. 728 * 729 * Marks a range of pages as no longer dirty. 730 * 731 * @mr: the region being updated. 732 * @addr: the start of the subrange being cleaned. 733 * @size: the size of the subrange being cleaned. 734 * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or 735 * %DIRTY_MEMORY_VGA. 736 */ 737 void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr, 738 hwaddr size, unsigned client); 739 740 /** 741 * memory_region_set_readonly: Turn a memory region read-only (or read-write) 742 * 743 * Allows a memory region to be marked as read-only (turning it into a ROM). 744 * only useful on RAM regions. 745 * 746 * @mr: the region being updated. 747 * @readonly: whether rhe region is to be ROM or RAM. 748 */ 749 void memory_region_set_readonly(MemoryRegion *mr, bool readonly); 750 751 /** 752 * memory_region_rom_device_set_romd: enable/disable ROMD mode 753 * 754 * Allows a ROM device (initialized with memory_region_init_rom_device() to 755 * set to ROMD mode (default) or MMIO mode. When it is in ROMD mode, the 756 * device is mapped to guest memory and satisfies read access directly. 757 * When in MMIO mode, reads are forwarded to the #MemoryRegion.read function. 758 * Writes are always handled by the #MemoryRegion.write function. 759 * 760 * @mr: the memory region to be updated 761 * @romd_mode: %true to put the region into ROMD mode 762 */ 763 void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode); 764 765 /** 766 * memory_region_set_coalescing: Enable memory coalescing for the region. 767 * 768 * Enabled writes to a region to be queued for later processing. MMIO ->write 769 * callbacks may be delayed until a non-coalesced MMIO is issued. 770 * Only useful for IO regions. Roughly similar to write-combining hardware. 771 * 772 * @mr: the memory region to be write coalesced 773 */ 774 void memory_region_set_coalescing(MemoryRegion *mr); 775 776 /** 777 * memory_region_add_coalescing: Enable memory coalescing for a sub-range of 778 * a region. 779 * 780 * Like memory_region_set_coalescing(), but works on a sub-range of a region. 781 * Multiple calls can be issued coalesced disjoint ranges. 782 * 783 * @mr: the memory region to be updated. 784 * @offset: the start of the range within the region to be coalesced. 785 * @size: the size of the subrange to be coalesced. 786 */ 787 void memory_region_add_coalescing(MemoryRegion *mr, 788 hwaddr offset, 789 uint64_t size); 790 791 /** 792 * memory_region_clear_coalescing: Disable MMIO coalescing for the region. 793 * 794 * Disables any coalescing caused by memory_region_set_coalescing() or 795 * memory_region_add_coalescing(). Roughly equivalent to uncacheble memory 796 * hardware. 797 * 798 * @mr: the memory region to be updated. 799 */ 800 void memory_region_clear_coalescing(MemoryRegion *mr); 801 802 /** 803 * memory_region_set_flush_coalesced: Enforce memory coalescing flush before 804 * accesses. 805 * 806 * Ensure that pending coalesced MMIO request are flushed before the memory 807 * region is accessed. This property is automatically enabled for all regions 808 * passed to memory_region_set_coalescing() and memory_region_add_coalescing(). 809 * 810 * @mr: the memory region to be updated. 811 */ 812 void memory_region_set_flush_coalesced(MemoryRegion *mr); 813 814 /** 815 * memory_region_clear_flush_coalesced: Disable memory coalescing flush before 816 * accesses. 817 * 818 * Clear the automatic coalesced MMIO flushing enabled via 819 * memory_region_set_flush_coalesced. Note that this service has no effect on 820 * memory regions that have MMIO coalescing enabled for themselves. For them, 821 * automatic flushing will stop once coalescing is disabled. 822 * 823 * @mr: the memory region to be updated. 824 */ 825 void memory_region_clear_flush_coalesced(MemoryRegion *mr); 826 827 /** 828 * memory_region_add_eventfd: Request an eventfd to be triggered when a word 829 * is written to a location. 830 * 831 * Marks a word in an IO region (initialized with memory_region_init_io()) 832 * as a trigger for an eventfd event. The I/O callback will not be called. 833 * The caller must be prepared to handle failure (that is, take the required 834 * action if the callback _is_ called). 835 * 836 * @mr: the memory region being updated. 837 * @addr: the address within @mr that is to be monitored 838 * @size: the size of the access to trigger the eventfd 839 * @match_data: whether to match against @data, instead of just @addr 840 * @data: the data to match against the guest write 841 * @fd: the eventfd to be triggered when @addr, @size, and @data all match. 842 **/ 843 void memory_region_add_eventfd(MemoryRegion *mr, 844 hwaddr addr, 845 unsigned size, 846 bool match_data, 847 uint64_t data, 848 EventNotifier *e); 849 850 /** 851 * memory_region_del_eventfd: Cancel an eventfd. 852 * 853 * Cancels an eventfd trigger requested by a previous 854 * memory_region_add_eventfd() call. 855 * 856 * @mr: the memory region being updated. 857 * @addr: the address within @mr that is to be monitored 858 * @size: the size of the access to trigger the eventfd 859 * @match_data: whether to match against @data, instead of just @addr 860 * @data: the data to match against the guest write 861 * @fd: the eventfd to be triggered when @addr, @size, and @data all match. 862 */ 863 void memory_region_del_eventfd(MemoryRegion *mr, 864 hwaddr addr, 865 unsigned size, 866 bool match_data, 867 uint64_t data, 868 EventNotifier *e); 869 870 /** 871 * memory_region_add_subregion: Add a subregion to a container. 872 * 873 * Adds a subregion at @offset. The subregion may not overlap with other 874 * subregions (except for those explicitly marked as overlapping). A region 875 * may only be added once as a subregion (unless removed with 876 * memory_region_del_subregion()); use memory_region_init_alias() if you 877 * want a region to be a subregion in multiple locations. 878 * 879 * @mr: the region to contain the new subregion; must be a container 880 * initialized with memory_region_init(). 881 * @offset: the offset relative to @mr where @subregion is added. 882 * @subregion: the subregion to be added. 883 */ 884 void memory_region_add_subregion(MemoryRegion *mr, 885 hwaddr offset, 886 MemoryRegion *subregion); 887 /** 888 * memory_region_add_subregion_overlap: Add a subregion to a container 889 * with overlap. 890 * 891 * Adds a subregion at @offset. The subregion may overlap with other 892 * subregions. Conflicts are resolved by having a higher @priority hide a 893 * lower @priority. Subregions without priority are taken as @priority 0. 894 * A region may only be added once as a subregion (unless removed with 895 * memory_region_del_subregion()); use memory_region_init_alias() if you 896 * want a region to be a subregion in multiple locations. 897 * 898 * @mr: the region to contain the new subregion; must be a container 899 * initialized with memory_region_init(). 900 * @offset: the offset relative to @mr where @subregion is added. 901 * @subregion: the subregion to be added. 902 * @priority: used for resolving overlaps; highest priority wins. 903 */ 904 void memory_region_add_subregion_overlap(MemoryRegion *mr, 905 hwaddr offset, 906 MemoryRegion *subregion, 907 int priority); 908 909 /** 910 * memory_region_get_ram_addr: Get the ram address associated with a memory 911 * region 912 * 913 * DO NOT USE THIS FUNCTION. This is a temporary workaround while the Xen 914 * code is being reworked. 915 */ 916 ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr); 917 918 uint64_t memory_region_get_alignment(const MemoryRegion *mr); 919 /** 920 * memory_region_del_subregion: Remove a subregion. 921 * 922 * Removes a subregion from its container. 923 * 924 * @mr: the container to be updated. 925 * @subregion: the region being removed; must be a current subregion of @mr. 926 */ 927 void memory_region_del_subregion(MemoryRegion *mr, 928 MemoryRegion *subregion); 929 930 /* 931 * memory_region_set_enabled: dynamically enable or disable a region 932 * 933 * Enables or disables a memory region. A disabled memory region 934 * ignores all accesses to itself and its subregions. It does not 935 * obscure sibling subregions with lower priority - it simply behaves as 936 * if it was removed from the hierarchy. 937 * 938 * Regions default to being enabled. 939 * 940 * @mr: the region to be updated 941 * @enabled: whether to enable or disable the region 942 */ 943 void memory_region_set_enabled(MemoryRegion *mr, bool enabled); 944 945 /* 946 * memory_region_set_address: dynamically update the address of a region 947 * 948 * Dynamically updates the address of a region, relative to its container. 949 * May be used on regions are currently part of a memory hierarchy. 950 * 951 * @mr: the region to be updated 952 * @addr: new address, relative to container region 953 */ 954 void memory_region_set_address(MemoryRegion *mr, hwaddr addr); 955 956 /* 957 * memory_region_set_size: dynamically update the size of a region. 958 * 959 * Dynamically updates the size of a region. 960 * 961 * @mr: the region to be updated 962 * @size: used size of the region. 963 */ 964 void memory_region_set_size(MemoryRegion *mr, uint64_t size); 965 966 /* 967 * memory_region_set_alias_offset: dynamically update a memory alias's offset 968 * 969 * Dynamically updates the offset into the target region that an alias points 970 * to, as if the fourth argument to memory_region_init_alias() has changed. 971 * 972 * @mr: the #MemoryRegion to be updated; should be an alias. 973 * @offset: the new offset into the target memory region 974 */ 975 void memory_region_set_alias_offset(MemoryRegion *mr, 976 hwaddr offset); 977 978 /** 979 * memory_region_present: checks if an address relative to a @container 980 * translates into #MemoryRegion within @container 981 * 982 * Answer whether a #MemoryRegion within @container covers the address 983 * @addr. 984 * 985 * @container: a #MemoryRegion within which @addr is a relative address 986 * @addr: the area within @container to be searched 987 */ 988 bool memory_region_present(MemoryRegion *container, hwaddr addr); 989 990 /** 991 * memory_region_is_mapped: returns true if #MemoryRegion is mapped 992 * into any address space. 993 * 994 * @mr: a #MemoryRegion which should be checked if it's mapped 995 */ 996 bool memory_region_is_mapped(MemoryRegion *mr); 997 998 /** 999 * memory_region_find: translate an address/size relative to a 1000 * MemoryRegion into a #MemoryRegionSection. 1001 * 1002 * Locates the first #MemoryRegion within @mr that overlaps the range 1003 * given by @addr and @size. 1004 * 1005 * Returns a #MemoryRegionSection that describes a contiguous overlap. 1006 * It will have the following characteristics: 1007 * .@size = 0 iff no overlap was found 1008 * .@mr is non-%NULL iff an overlap was found 1009 * 1010 * Remember that in the return value the @offset_within_region is 1011 * relative to the returned region (in the .@mr field), not to the 1012 * @mr argument. 1013 * 1014 * Similarly, the .@offset_within_address_space is relative to the 1015 * address space that contains both regions, the passed and the 1016 * returned one. However, in the special case where the @mr argument 1017 * has no container (and thus is the root of the address space), the 1018 * following will hold: 1019 * .@offset_within_address_space >= @addr 1020 * .@offset_within_address_space + .@size <= @addr + @size 1021 * 1022 * @mr: a MemoryRegion within which @addr is a relative address 1023 * @addr: start of the area within @as to be searched 1024 * @size: size of the area to be searched 1025 */ 1026 MemoryRegionSection memory_region_find(MemoryRegion *mr, 1027 hwaddr addr, uint64_t size); 1028 1029 /** 1030 * address_space_sync_dirty_bitmap: synchronize the dirty log for all memory 1031 * 1032 * Synchronizes the dirty page log for an entire address space. 1033 * @as: the address space that contains the memory being synchronized 1034 */ 1035 void address_space_sync_dirty_bitmap(AddressSpace *as); 1036 1037 /** 1038 * memory_region_transaction_begin: Start a transaction. 1039 * 1040 * During a transaction, changes will be accumulated and made visible 1041 * only when the transaction ends (is committed). 1042 */ 1043 void memory_region_transaction_begin(void); 1044 1045 /** 1046 * memory_region_transaction_commit: Commit a transaction and make changes 1047 * visible to the guest. 1048 */ 1049 void memory_region_transaction_commit(void); 1050 1051 /** 1052 * memory_listener_register: register callbacks to be called when memory 1053 * sections are mapped or unmapped into an address 1054 * space 1055 * 1056 * @listener: an object containing the callbacks to be called 1057 * @filter: if non-%NULL, only regions in this address space will be observed 1058 */ 1059 void memory_listener_register(MemoryListener *listener, AddressSpace *filter); 1060 1061 /** 1062 * memory_listener_unregister: undo the effect of memory_listener_register() 1063 * 1064 * @listener: an object containing the callbacks to be removed 1065 */ 1066 void memory_listener_unregister(MemoryListener *listener); 1067 1068 /** 1069 * memory_global_dirty_log_start: begin dirty logging for all regions 1070 */ 1071 void memory_global_dirty_log_start(void); 1072 1073 /** 1074 * memory_global_dirty_log_stop: end dirty logging for all regions 1075 */ 1076 void memory_global_dirty_log_stop(void); 1077 1078 void mtree_info(fprintf_function mon_printf, void *f); 1079 1080 /** 1081 * memory_region_dispatch_read: perform a read directly to the specified 1082 * MemoryRegion. 1083 * 1084 * @mr: #MemoryRegion to access 1085 * @addr: address within that region 1086 * @pval: pointer to uint64_t which the data is written to 1087 * @size: size of the access in bytes 1088 * @attrs: memory transaction attributes to use for the access 1089 */ 1090 MemTxResult memory_region_dispatch_read(MemoryRegion *mr, 1091 hwaddr addr, 1092 uint64_t *pval, 1093 unsigned size, 1094 MemTxAttrs attrs); 1095 /** 1096 * memory_region_dispatch_write: perform a write directly to the specified 1097 * MemoryRegion. 1098 * 1099 * @mr: #MemoryRegion to access 1100 * @addr: address within that region 1101 * @data: data to write 1102 * @size: size of the access in bytes 1103 * @attrs: memory transaction attributes to use for the access 1104 */ 1105 MemTxResult memory_region_dispatch_write(MemoryRegion *mr, 1106 hwaddr addr, 1107 uint64_t data, 1108 unsigned size, 1109 MemTxAttrs attrs); 1110 1111 /** 1112 * address_space_init: initializes an address space 1113 * 1114 * @as: an uninitialized #AddressSpace 1115 * @root: a #MemoryRegion that routes addesses for the address space 1116 * @name: an address space name. The name is only used for debugging 1117 * output. 1118 */ 1119 void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name); 1120 1121 1122 /** 1123 * address_space_destroy: destroy an address space 1124 * 1125 * Releases all resources associated with an address space. After an address space 1126 * is destroyed, its root memory region (given by address_space_init()) may be destroyed 1127 * as well. 1128 * 1129 * @as: address space to be destroyed 1130 */ 1131 void address_space_destroy(AddressSpace *as); 1132 1133 /** 1134 * address_space_rw: read from or write to an address space. 1135 * 1136 * Return a MemTxResult indicating whether the operation succeeded 1137 * or failed (eg unassigned memory, device rejected the transaction, 1138 * IOMMU fault). 1139 * 1140 * @as: #AddressSpace to be accessed 1141 * @addr: address within that address space 1142 * @attrs: memory transaction attributes 1143 * @buf: buffer with the data transferred 1144 * @is_write: indicates the transfer direction 1145 */ 1146 MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, 1147 MemTxAttrs attrs, uint8_t *buf, 1148 int len, bool is_write); 1149 1150 /** 1151 * address_space_write: write to address space. 1152 * 1153 * Return a MemTxResult indicating whether the operation succeeded 1154 * or failed (eg unassigned memory, device rejected the transaction, 1155 * IOMMU fault). 1156 * 1157 * @as: #AddressSpace to be accessed 1158 * @addr: address within that address space 1159 * @attrs: memory transaction attributes 1160 * @buf: buffer with the data transferred 1161 */ 1162 MemTxResult address_space_write(AddressSpace *as, hwaddr addr, 1163 MemTxAttrs attrs, 1164 const uint8_t *buf, int len); 1165 1166 /** 1167 * address_space_read: read from an address space. 1168 * 1169 * Return a MemTxResult indicating whether the operation succeeded 1170 * or failed (eg unassigned memory, device rejected the transaction, 1171 * IOMMU fault). 1172 * 1173 * @as: #AddressSpace to be accessed 1174 * @addr: address within that address space 1175 * @attrs: memory transaction attributes 1176 * @buf: buffer with the data transferred 1177 */ 1178 MemTxResult address_space_read(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, 1179 uint8_t *buf, int len); 1180 1181 /** 1182 * address_space_ld*: load from an address space 1183 * address_space_st*: store to an address space 1184 * 1185 * These functions perform a load or store of the byte, word, 1186 * longword or quad to the specified address within the AddressSpace. 1187 * The _le suffixed functions treat the data as little endian; 1188 * _be indicates big endian; no suffix indicates "same endianness 1189 * as guest CPU". 1190 * 1191 * The "guest CPU endianness" accessors are deprecated for use outside 1192 * target-* code; devices should be CPU-agnostic and use either the LE 1193 * or the BE accessors. 1194 * 1195 * @as #AddressSpace to be accessed 1196 * @addr: address within that address space 1197 * @val: data value, for stores 1198 * @attrs: memory transaction attributes 1199 * @result: location to write the success/failure of the transaction; 1200 * if NULL, this information is discarded 1201 */ 1202 uint32_t address_space_ldub(AddressSpace *as, hwaddr addr, 1203 MemTxAttrs attrs, MemTxResult *result); 1204 uint32_t address_space_lduw_le(AddressSpace *as, hwaddr addr, 1205 MemTxAttrs attrs, MemTxResult *result); 1206 uint32_t address_space_lduw_be(AddressSpace *as, hwaddr addr, 1207 MemTxAttrs attrs, MemTxResult *result); 1208 uint32_t address_space_ldl_le(AddressSpace *as, hwaddr addr, 1209 MemTxAttrs attrs, MemTxResult *result); 1210 uint32_t address_space_ldl_be(AddressSpace *as, hwaddr addr, 1211 MemTxAttrs attrs, MemTxResult *result); 1212 uint64_t address_space_ldq_le(AddressSpace *as, hwaddr addr, 1213 MemTxAttrs attrs, MemTxResult *result); 1214 uint64_t address_space_ldq_be(AddressSpace *as, hwaddr addr, 1215 MemTxAttrs attrs, MemTxResult *result); 1216 void address_space_stb(AddressSpace *as, hwaddr addr, uint32_t val, 1217 MemTxAttrs attrs, MemTxResult *result); 1218 void address_space_stw_le(AddressSpace *as, hwaddr addr, uint32_t val, 1219 MemTxAttrs attrs, MemTxResult *result); 1220 void address_space_stw_be(AddressSpace *as, hwaddr addr, uint32_t val, 1221 MemTxAttrs attrs, MemTxResult *result); 1222 void address_space_stl_le(AddressSpace *as, hwaddr addr, uint32_t val, 1223 MemTxAttrs attrs, MemTxResult *result); 1224 void address_space_stl_be(AddressSpace *as, hwaddr addr, uint32_t val, 1225 MemTxAttrs attrs, MemTxResult *result); 1226 void address_space_stq_le(AddressSpace *as, hwaddr addr, uint64_t val, 1227 MemTxAttrs attrs, MemTxResult *result); 1228 void address_space_stq_be(AddressSpace *as, hwaddr addr, uint64_t val, 1229 MemTxAttrs attrs, MemTxResult *result); 1230 1231 #ifdef NEED_CPU_H 1232 uint32_t address_space_lduw(AddressSpace *as, hwaddr addr, 1233 MemTxAttrs attrs, MemTxResult *result); 1234 uint32_t address_space_ldl(AddressSpace *as, hwaddr addr, 1235 MemTxAttrs attrs, MemTxResult *result); 1236 uint64_t address_space_ldq(AddressSpace *as, hwaddr addr, 1237 MemTxAttrs attrs, MemTxResult *result); 1238 void address_space_stl_notdirty(AddressSpace *as, hwaddr addr, uint32_t val, 1239 MemTxAttrs attrs, MemTxResult *result); 1240 void address_space_stw(AddressSpace *as, hwaddr addr, uint32_t val, 1241 MemTxAttrs attrs, MemTxResult *result); 1242 void address_space_stl(AddressSpace *as, hwaddr addr, uint32_t val, 1243 MemTxAttrs attrs, MemTxResult *result); 1244 void address_space_stq(AddressSpace *as, hwaddr addr, uint64_t val, 1245 MemTxAttrs attrs, MemTxResult *result); 1246 #endif 1247 1248 /* address_space_translate: translate an address range into an address space 1249 * into a MemoryRegion and an address range into that section. Should be 1250 * called from an RCU critical section, to avoid that the last reference 1251 * to the returned region disappears after address_space_translate returns. 1252 * 1253 * @as: #AddressSpace to be accessed 1254 * @addr: address within that address space 1255 * @xlat: pointer to address within the returned memory region section's 1256 * #MemoryRegion. 1257 * @len: pointer to length 1258 * @is_write: indicates the transfer direction 1259 */ 1260 MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr, 1261 hwaddr *xlat, hwaddr *len, 1262 bool is_write); 1263 1264 /* address_space_access_valid: check for validity of accessing an address 1265 * space range 1266 * 1267 * Check whether memory is assigned to the given address space range, and 1268 * access is permitted by any IOMMU regions that are active for the address 1269 * space. 1270 * 1271 * For now, addr and len should be aligned to a page size. This limitation 1272 * will be lifted in the future. 1273 * 1274 * @as: #AddressSpace to be accessed 1275 * @addr: address within that address space 1276 * @len: length of the area to be checked 1277 * @is_write: indicates the transfer direction 1278 */ 1279 bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write); 1280 1281 /* address_space_map: map a physical memory region into a host virtual address 1282 * 1283 * May map a subset of the requested range, given by and returned in @plen. 1284 * May return %NULL if resources needed to perform the mapping are exhausted. 1285 * Use only for reads OR writes - not for read-modify-write operations. 1286 * Use cpu_register_map_client() to know when retrying the map operation is 1287 * likely to succeed. 1288 * 1289 * @as: #AddressSpace to be accessed 1290 * @addr: address within that address space 1291 * @plen: pointer to length of buffer; updated on return 1292 * @is_write: indicates the transfer direction 1293 */ 1294 void *address_space_map(AddressSpace *as, hwaddr addr, 1295 hwaddr *plen, bool is_write); 1296 1297 /* address_space_unmap: Unmaps a memory region previously mapped by address_space_map() 1298 * 1299 * Will also mark the memory as dirty if @is_write == %true. @access_len gives 1300 * the amount of memory that was actually read or written by the caller. 1301 * 1302 * @as: #AddressSpace used 1303 * @addr: address within that address space 1304 * @len: buffer length as returned by address_space_map() 1305 * @access_len: amount of data actually transferred 1306 * @is_write: indicates the transfer direction 1307 */ 1308 void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len, 1309 int is_write, hwaddr access_len); 1310 1311 1312 #endif 1313 1314 #endif 1315