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