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