memory.h

   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 #include <stdint.h>
  20 #include <stdbool.h>
  21 #include "qemu-common.h"
  22 #include "cpu-common.h"
  23 #include "targphys.h"
  24 #include "qemu-queue.h"
  25 #include "iorange.h"
  26 #include "ioport.h"
  27 #include "int128.h"
  28
  29 typedef struct MemoryRegionOps MemoryRegionOps;
  30 typedef struct MemoryRegion MemoryRegion;
  31 typedef struct MemoryRegionPortio MemoryRegionPortio;
  32 typedef struct MemoryRegionMmio MemoryRegionMmio;
  33
  34 /* Must match *_DIRTY_FLAGS in cpu-all.h.  To be replaced with dynamic
  35  * registration.
  36  */
  37 #define DIRTY_MEMORY_VGA       0
  38 #define DIRTY_MEMORY_CODE      1
  39 #define DIRTY_MEMORY_MIGRATION 3
  40
  41 struct MemoryRegionMmio {
  42     CPUReadMemoryFunc *read[3];
  43     CPUWriteMemoryFunc *write[3];
  44 };
  45
  46 /*
  47  * Memory region callbacks
  48  */
  49 struct MemoryRegionOps {
  50     /* Read from the memory region. @addr is relative to @mr; @size is
  51      * in bytes. */
  52     uint64_t (*read)(void *opaque,
  53                      target_phys_addr_t addr,
  54                      unsigned size);
  55     /* Write to the memory region. @addr is relative to @mr; @size is
  56      * in bytes. */
  57     void (*write)(void *opaque,
  58                   target_phys_addr_t addr,
  59                   uint64_t data,
  60                   unsigned size);
  61
  62     enum device_endian endianness;
  63     /* Guest-visible constraints: */
  64     struct {
  65         /* If nonzero, specify bounds on access sizes beyond which a machine
  66          * check is thrown.
  67          */
  68         unsigned min_access_size;
  69         unsigned max_access_size;
  70         /* If true, unaligned accesses are supported.  Otherwise unaligned
  71          * accesses throw machine checks.
  72          */
  73          bool unaligned;
  74         /*
  75          * If present, and returns #false, the transaction is not accepted
  76          * by the device (and results in machine dependent behaviour such
  77          * as a machine check exception).
  78          */
  79         bool (*accepts)(void *opaque, target_phys_addr_t addr,
  80                         unsigned size, bool is_write);
  81     } valid;
  82     /* Internal implementation constraints: */
  83     struct {
  84         /* If nonzero, specifies the minimum size implemented.  Smaller sizes
  85          * will be rounded upwards and a partial result will be returned.
  86          */
  87         unsigned min_access_size;
  88         /* If nonzero, specifies the maximum size implemented.  Larger sizes
  89          * will be done as a series of accesses with smaller sizes.
  90          */
  91         unsigned max_access_size;
  92         /* If true, unaligned accesses are supported.  Otherwise all accesses
  93          * are converted to (possibly multiple) naturally aligned accesses.
  94          */
  95          bool unaligned;
  96     } impl;
  97
  98     /* If .read and .write are not present, old_portio may be used for
  99      * backwards compatibility with old portio registration
 100      */
 101     const MemoryRegionPortio *old_portio;
 102     /* If .read and .write are not present, old_mmio may be used for
 103      * backwards compatibility with old mmio registration
 104      */
 105     const MemoryRegionMmio old_mmio;
 106 };
 107
 108 typedef struct CoalescedMemoryRange CoalescedMemoryRange;
 109 typedef struct MemoryRegionIoeventfd MemoryRegionIoeventfd;
 110
 111 struct MemoryRegion {
 112     /* All fields are private - violators will be prosecuted */
 113     const MemoryRegionOps *ops;
 114     void *opaque;
 115     MemoryRegion *parent;
 116     Int128 size;
 117     target_phys_addr_t addr;
 118     void (*destructor)(MemoryRegion *mr);
 119     ram_addr_t ram_addr;
 120     IORange iorange;
 121     bool subpage;
 122     bool terminates;
 123     bool readable;
 124     bool ram;
 125     bool readonly; /* For RAM regions */
 126     bool enabled;
 127     bool rom_device;
 128     bool warning_printed; /* For reservations */
 129     MemoryRegion *alias;
 130     target_phys_addr_t alias_offset;
 131     unsigned priority;
 132     bool may_overlap;
 133     QTAILQ_HEAD(subregions, MemoryRegion) subregions;
 134     QTAILQ_ENTRY(MemoryRegion) subregions_link;
 135     QTAILQ_HEAD(coalesced_ranges, CoalescedMemoryRange) coalesced;
 136     const char *name;
 137     uint8_t dirty_log_mask;
 138     unsigned ioeventfd_nb;
 139     MemoryRegionIoeventfd *ioeventfds;
 140 };
 141
 142 struct MemoryRegionPortio {
 143     uint32_t offset;
 144     uint32_t len;
 145     unsigned size;
 146     IOPortReadFunc *read;
 147     IOPortWriteFunc *write;
 148 };
 149
 150 #define PORTIO_END_OF_LIST() { }
 151
 152 typedef struct MemoryRegionSection MemoryRegionSection;
 153
 154 /**
 155  * MemoryRegionSection: describes a fragment of a #MemoryRegion
 156  *
 157  * @mr: the region, or %NULL if empty
 158  * @address_space: the address space the region is mapped in
 159  * @offset_within_region: the beginning of the section, relative to @mr's start
 160  * @size: the size of the section; will not exceed @mr's boundaries
 161  * @offset_within_address_space: the address of the first byte of the section
 162  *     relative to the region's address space
 163  * @readonly: writes to this section are ignored
 164  */
 165 struct MemoryRegionSection {
 166     MemoryRegion *mr;
 167     MemoryRegion *address_space;
 168     target_phys_addr_t offset_within_region;
 169     uint64_t size;
 170     target_phys_addr_t offset_within_address_space;
 171     bool readonly;
 172 };
 173
 174 typedef struct MemoryListener MemoryListener;
 175
 176 /**
 177  * MemoryListener: callbacks structure for updates to the physical memory map
 178  *
 179  * Allows a component to adjust to changes in the guest-visible memory map.
 180  * Use with memory_listener_register() and memory_listener_unregister().
 181  */
 182 struct MemoryListener {
 183     void (*begin)(MemoryListener *listener);
 184     void (*commit)(MemoryListener *listener);
 185     void (*region_add)(MemoryListener *listener, MemoryRegionSection *section);
 186     void (*region_del)(MemoryListener *listener, MemoryRegionSection *section);
 187     void (*region_nop)(MemoryListener *listener, MemoryRegionSection *section);
 188     void (*log_start)(MemoryListener *listener, MemoryRegionSection *section);
 189     void (*log_stop)(MemoryListener *listener, MemoryRegionSection *section);
 190     void (*log_sync)(MemoryListener *listener, MemoryRegionSection *section);
 191     void (*log_global_start)(MemoryListener *listener);
 192     void (*log_global_stop)(MemoryListener *listener);
 193     void (*eventfd_add)(MemoryListener *listener, MemoryRegionSection *section,
 194                         bool match_data, uint64_t data, int fd);
 195     void (*eventfd_del)(MemoryListener *listener, MemoryRegionSection *section,
 196                         bool match_data, uint64_t data, int fd);
 197     /* Lower = earlier (during add), later (during del) */
 198     unsigned priority;
 199     MemoryRegion *address_space_filter;
 200     QTAILQ_ENTRY(MemoryListener) link;
 201 };
 202
 203 /**
 204  * memory_region_init: Initialize a memory region
 205  *
 206  * The region typically acts as a container for other memory regions.  Use
 207  * memory_region_add_subregion() to add subregions.
 208  *
 209  * @mr: the #MemoryRegion to be initialized
 210  * @name: used for debugging; not visible to the user or ABI
 211  * @size: size of the region; any subregions beyond this size will be clipped
 212  */
 213 void memory_region_init(MemoryRegion *mr,
 214                         const char *name,
 215                         uint64_t size);
 216 /**
 217  * memory_region_init_io: Initialize an I/O memory region.
 218  *
 219  * Accesses into the region will cause the callbacks in @ops to be called.
 220  * if @size is nonzero, subregions will be clipped to @size.
 221  *
 222  * @mr: the #MemoryRegion to be initialized.
 223  * @ops: a structure containing read and write callbacks to be used when
 224  *       I/O is performed on the region.
 225  * @opaque: passed to to the read and write callbacks of the @ops structure.
 226  * @name: used for debugging; not visible to the user or ABI
 227  * @size: size of the region.
 228  */
 229 void memory_region_init_io(MemoryRegion *mr,
 230                            const MemoryRegionOps *ops,
 231                            void *opaque,
 232                            const char *name,
 233                            uint64_t size);
 234
 235 /**
 236  * memory_region_init_ram:  Initialize RAM memory region.  Accesses into the
 237  *                          region will modify memory directly.
 238  *
 239  * @mr: the #MemoryRegion to be initialized.
 240  * @name: the name of the region.
 241  * @size: size of the region.
 242  */
 243 void memory_region_init_ram(MemoryRegion *mr,
 244                             const char *name,
 245                             uint64_t size);
 246
 247 /**
 248  * memory_region_init_ram:  Initialize RAM memory region from a user-provided.
 249  *                          pointer.  Accesses into the region will modify
 250  *                          memory directly.
 251  *
 252  * @mr: the #MemoryRegion to be initialized.
 253  * @name: the name of the region.
 254  * @size: size of the region.
 255  * @ptr: memory to be mapped; must contain at least @size bytes.
 256  */
 257 void memory_region_init_ram_ptr(MemoryRegion *mr,
 258                                 const char *name,
 259                                 uint64_t size,
 260                                 void *ptr);
 261
 262 /**
 263  * memory_region_init_alias: Initialize a memory region that aliases all or a
 264  *                           part of another memory region.
 265  *
 266  * @mr: the #MemoryRegion to be initialized.
 267  * @name: used for debugging; not visible to the user or ABI
 268  * @orig: the region to be referenced; @mr will be equivalent to
 269  *        @orig between @offset and @offset + @size - 1.
 270  * @offset: start of the section in @orig to be referenced.
 271  * @size: size of the region.
 272  */
 273 void memory_region_init_alias(MemoryRegion *mr,
 274                               const char *name,
 275                               MemoryRegion *orig,
 276                               target_phys_addr_t offset,
 277                               uint64_t size);
 278
 279 /**
 280  * memory_region_init_rom_device:  Initialize a ROM memory region.  Writes are
 281  *                                 handled via callbacks.
 282  *
 283  * @mr: the #MemoryRegion to be initialized.
 284  * @ops: callbacks for write access handling.
 285  * @name: the name of the region.
 286  * @size: size of the region.
 287  */
 288 void memory_region_init_rom_device(MemoryRegion *mr,
 289                                    const MemoryRegionOps *ops,
 290                                    void *opaque,
 291                                    const char *name,
 292                                    uint64_t size);
 293
 294 /**
 295  * memory_region_init_reservation: Initialize a memory region that reserves
 296  *                                 I/O space.
 297  *
 298  * A reservation region primariy serves debugging purposes.  It claims I/O
 299  * space that is not supposed to be handled by QEMU itself.  Any access via
 300  * the memory API will cause an abort().
 301  *
 302  * @mr: the #MemoryRegion to be initialized
 303  * @name: used for debugging; not visible to the user or ABI
 304  * @size: size of the region.
 305  */
 306 void memory_region_init_reservation(MemoryRegion *mr,
 307                                     const char *name,
 308                                     uint64_t size);
 309 /**
 310  * memory_region_destroy: Destroy a memory region and reclaim all resources.
 311  *
 312  * @mr: the region to be destroyed.  May not currently be a subregion
 313  *      (see memory_region_add_subregion()) or referenced in an alias
 314  *      (see memory_region_init_alias()).
 315  */
 316 void memory_region_destroy(MemoryRegion *mr);
 317
 318 /**
 319  * memory_region_size: get a memory region's size.
 320  *
 321  * @mr: the memory region being queried.
 322  */
 323 uint64_t memory_region_size(MemoryRegion *mr);
 324
 325 /**
 326  * memory_region_is_ram: check whether a memory region is random access
 327  *
 328  * Returns %true is a memory region is random access.
 329  *
 330  * @mr: the memory region being queried
 331  */
 332 bool memory_region_is_ram(MemoryRegion *mr);
 333
 334 /**
 335  * memory_region_name: get a memory region's name
 336  *
 337  * Returns the string that was used to initialize the memory region.
 338  *
 339  * @mr: the memory region being queried
 340  */
 341 const char *memory_region_name(MemoryRegion *mr);
 342
 343 /**
 344  * memory_region_is_logging: return whether a memory region is logging writes
 345  *
 346  * Returns %true if the memory region is logging writes
 347  *
 348  * @mr: the memory region being queried
 349  */
 350 bool memory_region_is_logging(MemoryRegion *mr);
 351
 352 /**
 353  * memory_region_is_rom: check whether a memory region is ROM
 354  *
 355  * Returns %true is a memory region is read-only memory.
 356  *
 357  * @mr: the memory region being queried
 358  */
 359 bool memory_region_is_rom(MemoryRegion *mr);
 360
 361 /**
 362  * memory_region_get_ram_ptr: Get a pointer into a RAM memory region.
 363  *
 364  * Returns a host pointer to a RAM memory region (created with
 365  * memory_region_init_ram() or memory_region_init_ram_ptr()).  Use with
 366  * care.
 367  *
 368  * @mr: the memory region being queried.
 369  */
 370 void *memory_region_get_ram_ptr(MemoryRegion *mr);
 371
 372 /**
 373  * memory_region_set_log: Turn dirty logging on or off for a region.
 374  *
 375  * Turns dirty logging on or off for a specified client (display, migration).
 376  * Only meaningful for RAM regions.
 377  *
 378  * @mr: the memory region being updated.
 379  * @log: whether dirty logging is to be enabled or disabled.
 380  * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or
 381  *          %DIRTY_MEMORY_VGA.
 382  */
 383 void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client);
 384
 385 /**
 386  * memory_region_get_dirty: Check whether a range of bytes is dirty
 387  *                          for a specified client.
 388  *
 389  * Checks whether a range of bytes has been written to since the last
 390  * call to memory_region_reset_dirty() with the same @client.  Dirty logging
 391  * must be enabled.
 392  *
 393  * @mr: the memory region being queried.
 394  * @addr: the address (relative to the start of the region) being queried.
 395  * @size: the size of the range being queried.
 396  * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or
 397  *          %DIRTY_MEMORY_VGA.
 398  */
 399 bool memory_region_get_dirty(MemoryRegion *mr, target_phys_addr_t addr,
 400                              target_phys_addr_t size, unsigned client);
 401
 402 /**
 403  * memory_region_set_dirty: Mark a range of bytes as dirty in a memory region.
 404  *
 405  * Marks a range of bytes as dirty, after it has been dirtied outside
 406  * guest code.
 407  *
 408  * @mr: the memory region being dirtied.
 409  * @addr: the address (relative to the start of the region) being dirtied.
 410  * @size: size of the range being dirtied.
 411  */
 412 void memory_region_set_dirty(MemoryRegion *mr, target_phys_addr_t addr,
 413                              target_phys_addr_t size);
 414
 415 /**
 416  * memory_region_sync_dirty_bitmap: Synchronize a region's dirty bitmap with
 417  *                                  any external TLBs (e.g. kvm)
 418  *
 419  * Flushes dirty information from accelerators such as kvm and vhost-net
 420  * and makes it available to users of the memory API.
 421  *
 422  * @mr: the region being flushed.
 423  */
 424 void memory_region_sync_dirty_bitmap(MemoryRegion *mr);
 425
 426 /**
 427  * memory_region_reset_dirty: Mark a range of pages as clean, for a specified
 428  *                            client.
 429  *
 430  * Marks a range of pages as no longer dirty.
 431  *
 432  * @mr: the region being updated.
 433  * @addr: the start of the subrange being cleaned.
 434  * @size: the size of the subrange being cleaned.
 435  * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or
 436  *          %DIRTY_MEMORY_VGA.
 437  */
 438 void memory_region_reset_dirty(MemoryRegion *mr, target_phys_addr_t addr,
 439                                target_phys_addr_t size, unsigned client);
 440
 441 /**
 442  * memory_region_set_readonly: Turn a memory region read-only (or read-write)
 443  *
 444  * Allows a memory region to be marked as read-only (turning it into a ROM).
 445  * only useful on RAM regions.
 446  *
 447  * @mr: the region being updated.
 448  * @readonly: whether rhe region is to be ROM or RAM.
 449  */
 450 void memory_region_set_readonly(MemoryRegion *mr, bool readonly);
 451
 452 /**
 453  * memory_region_rom_device_set_readable: enable/disable ROM readability
 454  *
 455  * Allows a ROM device (initialized with memory_region_init_rom_device() to
 456  * to be marked as readable (default) or not readable.  When it is readable,
 457  * the device is mapped to guest memory.  When not readable, reads are
 458  * forwarded to the #MemoryRegion.read function.
 459  *
 460  * @mr: the memory region to be updated
 461  * @readable: whether reads are satisified directly (%true) or via callbacks
 462  *            (%false)
 463  */
 464 void memory_region_rom_device_set_readable(MemoryRegion *mr, bool readable);
 465
 466 /**
 467  * memory_region_set_coalescing: Enable memory coalescing for the region.
 468  *
 469  * Enabled writes to a region to be queued for later processing. MMIO ->write
 470  * callbacks may be delayed until a non-coalesced MMIO is issued.
 471  * Only useful for IO regions.  Roughly similar to write-combining hardware.
 472  *
 473  * @mr: the memory region to be write coalesced
 474  */
 475 void memory_region_set_coalescing(MemoryRegion *mr);
 476
 477 /**
 478  * memory_region_add_coalescing: Enable memory coalescing for a sub-range of
 479  *                               a region.
 480  *
 481  * Like memory_region_set_coalescing(), but works on a sub-range of a region.
 482  * Multiple calls can be issued coalesced disjoint ranges.
 483  *
 484  * @mr: the memory region to be updated.
 485  * @offset: the start of the range within the region to be coalesced.
 486  * @size: the size of the subrange to be coalesced.
 487  */
 488 void memory_region_add_coalescing(MemoryRegion *mr,
 489                                   target_phys_addr_t offset,
 490                                   uint64_t size);
 491
 492 /**
 493  * memory_region_clear_coalescing: Disable MMIO coalescing for the region.
 494  *
 495  * Disables any coalescing caused by memory_region_set_coalescing() or
 496  * memory_region_add_coalescing().  Roughly equivalent to uncacheble memory
 497  * hardware.
 498  *
 499  * @mr: the memory region to be updated.
 500  */
 501 void memory_region_clear_coalescing(MemoryRegion *mr);
 502
 503 /**
 504  * memory_region_add_eventfd: Request an eventfd to be triggered when a word
 505  *                            is written to a location.
 506  *
 507  * Marks a word in an IO region (initialized with memory_region_init_io())
 508  * as a trigger for an eventfd event.  The I/O callback will not be called.
 509  * The caller must be prepared to handle failure (that is, take the required
 510  * action if the callback _is_ called).
 511  *
 512  * @mr: the memory region being updated.
 513  * @addr: the address within @mr that is to be monitored
 514  * @size: the size of the access to trigger the eventfd
 515  * @match_data: whether to match against @data, instead of just @addr
 516  * @data: the data to match against the guest write
 517  * @fd: the eventfd to be triggered when @addr, @size, and @data all match.
 518  **/
 519 void memory_region_add_eventfd(MemoryRegion *mr,
 520                                target_phys_addr_t addr,
 521                                unsigned size,
 522                                bool match_data,
 523                                uint64_t data,
 524                                int fd);
 525
 526 /**
 527  * memory_region_del_eventfd: Cancel an eventfd.
 528  *
 529  * Cancels an eventfd trigger requested by a previous
 530  * memory_region_add_eventfd() call.
 531  *
 532  * @mr: the memory region being updated.
 533  * @addr: the address within @mr that is to be monitored
 534  * @size: the size of the access to trigger the eventfd
 535  * @match_data: whether to match against @data, instead of just @addr
 536  * @data: the data to match against the guest write
 537  * @fd: the eventfd to be triggered when @addr, @size, and @data all match.
 538  */
 539 void memory_region_del_eventfd(MemoryRegion *mr,
 540                                target_phys_addr_t addr,
 541                                unsigned size,
 542                                bool match_data,
 543                                uint64_t data,
 544                                int fd);
 545 /**
 546  * memory_region_add_subregion: Add a subregion to a container.
 547  *
 548  * Adds a subregion at @offset.  The subregion may not overlap with other
 549  * subregions (except for those explicitly marked as overlapping).  A region
 550  * may only be added once as a subregion (unless removed with
 551  * memory_region_del_subregion()); use memory_region_init_alias() if you
 552  * want a region to be a subregion in multiple locations.
 553  *
 554  * @mr: the region to contain the new subregion; must be a container
 555  *      initialized with memory_region_init().
 556  * @offset: the offset relative to @mr where @subregion is added.
 557  * @subregion: the subregion to be added.
 558  */
 559 void memory_region_add_subregion(MemoryRegion *mr,
 560                                  target_phys_addr_t offset,
 561                                  MemoryRegion *subregion);
 562 /**
 563  * memory_region_add_subregion: Add a subregion to a container, with overlap.
 564  *
 565  * Adds a subregion at @offset.  The subregion may overlap with other
 566  * subregions.  Conflicts are resolved by having a higher @priority hide a
 567  * lower @priority. Subregions without priority are taken as @priority 0.
 568  * A region may only be added once as a subregion (unless removed with
 569  * memory_region_del_subregion()); use memory_region_init_alias() if you
 570  * want a region to be a subregion in multiple locations.
 571  *
 572  * @mr: the region to contain the new subregion; must be a container
 573  *      initialized with memory_region_init().
 574  * @offset: the offset relative to @mr where @subregion is added.
 575  * @subregion: the subregion to be added.
 576  * @priority: used for resolving overlaps; highest priority wins.
 577  */
 578 void memory_region_add_subregion_overlap(MemoryRegion *mr,
 579                                          target_phys_addr_t offset,
 580                                          MemoryRegion *subregion,
 581                                          unsigned priority);
 582
 583 /**
 584  * memory_region_get_ram_addr: Get the ram address associated with a memory
 585  *                             region
 586  *
 587  * DO NOT USE THIS FUNCTION.  This is a temporary workaround while the Xen
 588  * code is being reworked.
 589  */
 590 ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr);
 591
 592 /**
 593  * memory_region_del_subregion: Remove a subregion.
 594  *
 595  * Removes a subregion from its container.
 596  *
 597  * @mr: the container to be updated.
 598  * @subregion: the region being removed; must be a current subregion of @mr.
 599  */
 600 void memory_region_del_subregion(MemoryRegion *mr,
 601                                  MemoryRegion *subregion);
 602
 603 /*
 604  * memory_region_set_enabled: dynamically enable or disable a region
 605  *
 606  * Enables or disables a memory region.  A disabled memory region
 607  * ignores all accesses to itself and its subregions.  It does not
 608  * obscure sibling subregions with lower priority - it simply behaves as
 609  * if it was removed from the hierarchy.
 610  *
 611  * Regions default to being enabled.
 612  *
 613  * @mr: the region to be updated
 614  * @enabled: whether to enable or disable the region
 615  */
 616 void memory_region_set_enabled(MemoryRegion *mr, bool enabled);
 617
 618 /*
 619  * memory_region_set_address: dynamically update the address of a region
 620  *
 621  * Dynamically updates the address of a region, relative to its parent.
 622  * May be used on regions are currently part of a memory hierarchy.
 623  *
 624  * @mr: the region to be updated
 625  * @addr: new address, relative to parent region
 626  */
 627 void memory_region_set_address(MemoryRegion *mr, target_phys_addr_t addr);
 628
 629 /*
 630  * memory_region_set_alias_offset: dynamically update a memory alias's offset
 631  *
 632  * Dynamically updates the offset into the target region that an alias points
 633  * to, as if the fourth argument to memory_region_init_alias() has changed.
 634  *
 635  * @mr: the #MemoryRegion to be updated; should be an alias.
 636  * @offset: the new offset into the target memory region
 637  */
 638 void memory_region_set_alias_offset(MemoryRegion *mr,
 639                                     target_phys_addr_t offset);
 640
 641 /**
 642  * memory_region_find: locate a MemoryRegion in an address space
 643  *
 644  * Locates the first #MemoryRegion within an address space given by
 645  * @address_space that overlaps the range given by @addr and @size.
 646  *
 647  * Returns a #MemoryRegionSection that describes a contiguous overlap.
 648  * It will have the following characteristics:
 649  *    .@offset_within_address_space >= @addr
 650  *    .@offset_within_address_space + .@size <= @addr + @size
 651  *    .@size = 0 iff no overlap was found
 652  *    .@mr is non-%NULL iff an overlap was found
 653  *
 654  * @address_space: a top-level (i.e. parentless) region that contains
 655  *       the region to be found
 656  * @addr: start of the area within @address_space to be searched
 657  * @size: size of the area to be searched
 658  */
 659 MemoryRegionSection memory_region_find(MemoryRegion *address_space,
 660                                        target_phys_addr_t addr, uint64_t size);
 661
 662
 663 /**
 664  * memory_global_sync_dirty_bitmap: synchronize the dirty log for all memory
 665  *
 666  * Synchronizes the dirty page log for an entire address space.
 667  * @address_space: a top-level (i.e. parentless) region that contains the
 668  *       memory being synchronized
 669  */
 670 void memory_global_sync_dirty_bitmap(MemoryRegion *address_space);
 671
 672 /**
 673  * memory_region_transaction_begin: Start a transaction.
 674  *
 675  * During a transaction, changes will be accumulated and made visible
 676  * only when the transaction ends (is committed).
 677  */
 678 void memory_region_transaction_begin(void);
 679
 680 /**
 681  * memory_region_transaction_commit: Commit a transaction and make changes
 682  *                                   visible to the guest.
 683  */
 684 void memory_region_transaction_commit(void);
 685
 686 /**
 687  * memory_listener_register: register callbacks to be called when memory
 688  *                           sections are mapped or unmapped into an address
 689  *                           space
 690  *
 691  * @listener: an object containing the callbacks to be called
 692  * @filter: if non-%NULL, only regions in this address space will be observed
 693  */
 694 void memory_listener_register(MemoryListener *listener, MemoryRegion *filter);
 695
 696 /**
 697  * memory_listener_unregister: undo the effect of memory_listener_register()
 698  *
 699  * @listener: an object containing the callbacks to be removed
 700  */
 701 void memory_listener_unregister(MemoryListener *listener);
 702
 703 /**
 704  * memory_global_dirty_log_start: begin dirty logging for all regions
 705  */
 706 void memory_global_dirty_log_start(void);
 707
 708 /**
 709  * memory_global_dirty_log_stop: begin dirty logging for all regions
 710  */
 711 void memory_global_dirty_log_stop(void);
 712
 713 void mtree_info(fprintf_function mon_printf, void *f);
 714
 715 #endif
 716
 717 #endif