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