memory.c

   1 /*
   2  * Physical memory management
   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  * Contributions after 2012-01-13 are licensed under the terms of the
  13  * GNU GPL, version 2 or (at your option) any later version.
  14  */
  15
  16 #include "exec/memory.h"
  17 #include "exec/address-spaces.h"
  18 #include "exec/ioport.h"
  19 #include "qapi/visitor.h"
  20 #include "qemu/bitops.h"
  21 #include "qom/object.h"
  22 #include "trace.h"
  23 #include <assert.h>
  24
  25 #include "exec/memory-internal.h"
  26 #include "exec/ram_addr.h"
  27 #include "sysemu/sysemu.h"
  28
  29 //#define DEBUG_UNASSIGNED
  30
  31 static unsigned memory_region_transaction_depth;
  32 static bool memory_region_update_pending;
  33 static bool ioeventfd_update_pending;
  34 static bool global_dirty_log = false;
  35
  36 static QTAILQ_HEAD(memory_listeners, MemoryListener) memory_listeners
  37     = QTAILQ_HEAD_INITIALIZER(memory_listeners);
  38
  39 static QTAILQ_HEAD(, AddressSpace) address_spaces
  40     = QTAILQ_HEAD_INITIALIZER(address_spaces);
  41
  42 typedef struct AddrRange AddrRange;
  43
  44 /*
  45  * Note that signed integers are needed for negative offsetting in aliases
  46  * (large MemoryRegion::alias_offset).
  47  */
  48 struct AddrRange {
  49     Int128 start;
  50     Int128 size;
  51 };
  52
  53 static AddrRange addrrange_make(Int128 start, Int128 size)
  54 {
  55     return (AddrRange) { start, size };
  56 }
  57
  58 static bool addrrange_equal(AddrRange r1, AddrRange r2)
  59 {
  60     return int128_eq(r1.start, r2.start) && int128_eq(r1.size, r2.size);
  61 }
  62
  63 static Int128 addrrange_end(AddrRange r)
  64 {
  65     return int128_add(r.start, r.size);
  66 }
  67
  68 static AddrRange addrrange_shift(AddrRange range, Int128 delta)
  69 {
  70     int128_addto(&range.start, delta);
  71     return range;
  72 }
  73
  74 static bool addrrange_contains(AddrRange range, Int128 addr)
  75 {
  76     return int128_ge(addr, range.start)
  77         && int128_lt(addr, addrrange_end(range));
  78 }
  79
  80 static bool addrrange_intersects(AddrRange r1, AddrRange r2)
  81 {
  82     return addrrange_contains(r1, r2.start)
  83         || addrrange_contains(r2, r1.start);
  84 }
  85
  86 static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2)
  87 {
  88     Int128 start = int128_max(r1.start, r2.start);
  89     Int128 end = int128_min(addrrange_end(r1), addrrange_end(r2));
  90     return addrrange_make(start, int128_sub(end, start));
  91 }
  92
  93 enum ListenerDirection { Forward, Reverse };
  94
  95 static bool memory_listener_match(MemoryListener *listener,
  96                                   MemoryRegionSection *section)
  97 {
  98     return !listener->address_space_filter
  99         || listener->address_space_filter == section->address_space;
 100 }
 101
 102 #define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...)    \
 103     do {                                                                \
 104         MemoryListener *_listener;                                      \
 105                                                                         \
 106         switch (_direction) {                                           \
 107         case Forward:                                                   \
 108             QTAILQ_FOREACH(_listener, &memory_listeners, link) {        \
 109                 if (_listener->_callback) {                             \
 110                     _listener->_callback(_listener, ##_args);           \
 111                 }                                                       \
 112             }                                                           \
 113             break;                                                      \
 114         case Reverse:                                                   \
 115             QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners,        \
 116                                    memory_listeners, link) {            \
 117                 if (_listener->_callback) {                             \
 118                     _listener->_callback(_listener, ##_args);           \
 119                 }                                                       \
 120             }                                                           \
 121             break;                                                      \
 122         default:                                                        \
 123             abort();                                                    \
 124         }                                                               \
 125     } while (0)
 126
 127 #define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \
 128     do {                                                                \
 129         MemoryListener *_listener;                                      \
 130                                                                         \
 131         switch (_direction) {                                           \
 132         case Forward:                                                   \
 133             QTAILQ_FOREACH(_listener, &memory_listeners, link) {        \
 134                 if (_listener->_callback                                \
 135                     && memory_listener_match(_listener, _section)) {    \
 136                     _listener->_callback(_listener, _section, ##_args); \
 137                 }                                                       \
 138             }                                                           \
 139             break;                                                      \
 140         case Reverse:                                                   \
 141             QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners,        \
 142                                    memory_listeners, link) {            \
 143                 if (_listener->_callback                                \
 144                     && memory_listener_match(_listener, _section)) {    \
 145                     _listener->_callback(_listener, _section, ##_args); \
 146                 }                                                       \
 147             }                                                           \
 148             break;                                                      \
 149         default:                                                        \
 150             abort();                                                    \
 151         }                                                               \
 152     } while (0)
 153
 154 /* No need to ref/unref .mr, the FlatRange keeps it alive.  */
 155 #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback)            \
 156     MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) {       \
 157         .mr = (fr)->mr,                                                 \
 158         .address_space = (as),                                          \
 159         .offset_within_region = (fr)->offset_in_region,                 \
 160         .size = (fr)->addr.size,                                        \
 161         .offset_within_address_space = int128_get64((fr)->addr.start),  \
 162         .readonly = (fr)->readonly,                                     \
 163               }))
 164
 165 struct CoalescedMemoryRange {
 166     AddrRange addr;
 167     QTAILQ_ENTRY(CoalescedMemoryRange) link;
 168 };
 169
 170 struct MemoryRegionIoeventfd {
 171     AddrRange addr;
 172     bool match_data;
 173     uint64_t data;
 174     EventNotifier *e;
 175 };
 176
 177 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a,
 178                                            MemoryRegionIoeventfd b)
 179 {
 180     if (int128_lt(a.addr.start, b.addr.start)) {
 181         return true;
 182     } else if (int128_gt(a.addr.start, b.addr.start)) {
 183         return false;
 184     } else if (int128_lt(a.addr.size, b.addr.size)) {
 185         return true;
 186     } else if (int128_gt(a.addr.size, b.addr.size)) {
 187         return false;
 188     } else if (a.match_data < b.match_data) {
 189         return true;
 190     } else  if (a.match_data > b.match_data) {
 191         return false;
 192     } else if (a.match_data) {
 193         if (a.data < b.data) {
 194             return true;
 195         } else if (a.data > b.data) {
 196             return false;
 197         }
 198     }
 199     if (a.e < b.e) {
 200         return true;
 201     } else if (a.e > b.e) {
 202         return false;
 203     }
 204     return false;
 205 }
 206
 207 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a,
 208                                           MemoryRegionIoeventfd b)
 209 {
 210     return !memory_region_ioeventfd_before(a, b)
 211         && !memory_region_ioeventfd_before(b, a);
 212 }
 213
 214 typedef struct FlatRange FlatRange;
 215 typedef struct FlatView FlatView;
 216
 217 /* Range of memory in the global map.  Addresses are absolute. */
 218 struct FlatRange {
 219     MemoryRegion *mr;
 220     hwaddr offset_in_region;
 221     AddrRange addr;
 222     uint8_t dirty_log_mask;
 223     bool romd_mode;
 224     bool readonly;
 225 };
 226
 227 /* Flattened global view of current active memory hierarchy.  Kept in sorted
 228  * order.
 229  */
 230 struct FlatView {
 231     struct rcu_head rcu;
 232     unsigned ref;
 233     FlatRange *ranges;
 234     unsigned nr;
 235     unsigned nr_allocated;
 236 };
 237
 238 typedef struct AddressSpaceOps AddressSpaceOps;
 239
 240 #define FOR_EACH_FLAT_RANGE(var, view)          \
 241     for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
 242
 243 static bool flatrange_equal(FlatRange *a, FlatRange *b)
 244 {
 245     return a->mr == b->mr
 246         && addrrange_equal(a->addr, b->addr)
 247         && a->offset_in_region == b->offset_in_region
 248         && a->romd_mode == b->romd_mode
 249         && a->readonly == b->readonly;
 250 }
 251
 252 static void flatview_init(FlatView *view)
 253 {
 254     view->ref = 1;
 255     view->ranges = NULL;
 256     view->nr = 0;
 257     view->nr_allocated = 0;
 258 }
 259
 260 /* Insert a range into a given position.  Caller is responsible for maintaining
 261  * sorting order.
 262  */
 263 static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range)
 264 {
 265     if (view->nr == view->nr_allocated) {
 266         view->nr_allocated = MAX(2 * view->nr, 10);
 267         view->ranges = g_realloc(view->ranges,
 268                                     view->nr_allocated * sizeof(*view->ranges));
 269     }
 270     memmove(view->ranges + pos + 1, view->ranges + pos,
 271             (view->nr - pos) * sizeof(FlatRange));
 272     view->ranges[pos] = *range;
 273     memory_region_ref(range->mr);
 274     ++view->nr;
 275 }
 276
 277 static void flatview_destroy(FlatView *view)
 278 {
 279     int i;
 280
 281     for (i = 0; i < view->nr; i++) {
 282         memory_region_unref(view->ranges[i].mr);
 283     }
 284     g_free(view->ranges);
 285     g_free(view);
 286 }
 287
 288 static void flatview_ref(FlatView *view)
 289 {
 290     atomic_inc(&view->ref);
 291 }
 292
 293 static void flatview_unref(FlatView *view)
 294 {
 295     if (atomic_fetch_dec(&view->ref) == 1) {
 296         flatview_destroy(view);
 297     }
 298 }
 299
 300 static bool can_merge(FlatRange *r1, FlatRange *r2)
 301 {
 302     return int128_eq(addrrange_end(r1->addr), r2->addr.start)
 303         && r1->mr == r2->mr
 304         && int128_eq(int128_add(int128_make64(r1->offset_in_region),
 305                                 r1->addr.size),
 306                      int128_make64(r2->offset_in_region))
 307         && r1->dirty_log_mask == r2->dirty_log_mask
 308         && r1->romd_mode == r2->romd_mode
 309         && r1->readonly == r2->readonly;
 310 }
 311
 312 /* Attempt to simplify a view by merging adjacent ranges */
 313 static void flatview_simplify(FlatView *view)
 314 {
 315     unsigned i, j;
 316
 317     i = 0;
 318     while (i < view->nr) {
 319         j = i + 1;
 320         while (j < view->nr
 321                && can_merge(&view->ranges[j-1], &view->ranges[j])) {
 322             int128_addto(&view->ranges[i].addr.size, view->ranges[j].addr.size);
 323             ++j;
 324         }
 325         ++i;
 326         memmove(&view->ranges[i], &view->ranges[j],
 327                 (view->nr - j) * sizeof(view->ranges[j]));
 328         view->nr -= j - i;
 329     }
 330 }
 331
 332 static bool memory_region_big_endian(MemoryRegion *mr)
 333 {
 334 #ifdef TARGET_WORDS_BIGENDIAN
 335     return mr->ops->endianness != DEVICE_LITTLE_ENDIAN;
 336 #else
 337     return mr->ops->endianness == DEVICE_BIG_ENDIAN;
 338 #endif
 339 }
 340
 341 static bool memory_region_wrong_endianness(MemoryRegion *mr)
 342 {
 343 #ifdef TARGET_WORDS_BIGENDIAN
 344     return mr->ops->endianness == DEVICE_LITTLE_ENDIAN;
 345 #else
 346     return mr->ops->endianness == DEVICE_BIG_ENDIAN;
 347 #endif
 348 }
 349
 350 static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size)
 351 {
 352     if (memory_region_wrong_endianness(mr)) {
 353         switch (size) {
 354         case 1:
 355             break;
 356         case 2:
 357             *data = bswap16(*data);
 358             break;
 359         case 4:
 360             *data = bswap32(*data);
 361             break;
 362         case 8:
 363             *data = bswap64(*data);
 364             break;
 365         default:
 366             abort();
 367         }
 368     }
 369 }
 370
 371 static MemTxResult memory_region_oldmmio_read_accessor(MemoryRegion *mr,
 372                                                        hwaddr addr,
 373                                                        uint64_t *value,
 374                                                        unsigned size,
 375                                                        unsigned shift,
 376                                                        uint64_t mask,
 377                                                        MemTxAttrs attrs)
 378 {
 379     uint64_t tmp;
 380
 381     tmp = mr->ops->old_mmio.read[ctz32(size)](mr->opaque, addr);
 382     trace_memory_region_ops_read(mr, addr, tmp, size);
 383     *value |= (tmp & mask) << shift;
 384     return MEMTX_OK;
 385 }
 386
 387 static MemTxResult  memory_region_read_accessor(MemoryRegion *mr,
 388                                                 hwaddr addr,
 389                                                 uint64_t *value,
 390                                                 unsigned size,
 391                                                 unsigned shift,
 392                                                 uint64_t mask,
 393                                                 MemTxAttrs attrs)
 394 {
 395     uint64_t tmp;
 396
 397     if (mr->flush_coalesced_mmio) {
 398         qemu_flush_coalesced_mmio_buffer();
 399     }
 400     tmp = mr->ops->read(mr->opaque, addr, size);
 401     trace_memory_region_ops_read(mr, addr, tmp, size);
 402     *value |= (tmp & mask) << shift;
 403     return MEMTX_OK;
 404 }
 405
 406 static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
 407                                                           hwaddr addr,
 408                                                           uint64_t *value,
 409                                                           unsigned size,
 410                                                           unsigned shift,
 411                                                           uint64_t mask,
 412                                                           MemTxAttrs attrs)
 413 {
 414     uint64_t tmp = 0;
 415     MemTxResult r;
 416
 417     if (mr->flush_coalesced_mmio) {
 418         qemu_flush_coalesced_mmio_buffer();
 419     }
 420     r = mr->ops->read_with_attrs(mr->opaque, addr, &tmp, size, attrs);
 421     trace_memory_region_ops_read(mr, addr, tmp, size);
 422     *value |= (tmp & mask) << shift;
 423     return r;
 424 }
 425
 426 static MemTxResult memory_region_oldmmio_write_accessor(MemoryRegion *mr,
 427                                                         hwaddr addr,
 428                                                         uint64_t *value,
 429                                                         unsigned size,
 430                                                         unsigned shift,
 431                                                         uint64_t mask,
 432                                                         MemTxAttrs attrs)
 433 {
 434     uint64_t tmp;
 435
 436     tmp = (*value >> shift) & mask;
 437     trace_memory_region_ops_write(mr, addr, tmp, size);
 438     mr->ops->old_mmio.write[ctz32(size)](mr->opaque, addr, tmp);
 439     return MEMTX_OK;
 440 }
 441
 442 static MemTxResult memory_region_write_accessor(MemoryRegion *mr,
 443                                                 hwaddr addr,
 444                                                 uint64_t *value,
 445                                                 unsigned size,
 446                                                 unsigned shift,
 447                                                 uint64_t mask,
 448                                                 MemTxAttrs attrs)
 449 {
 450     uint64_t tmp;
 451
 452     if (mr->flush_coalesced_mmio) {
 453         qemu_flush_coalesced_mmio_buffer();
 454     }
 455     tmp = (*value >> shift) & mask;
 456     trace_memory_region_ops_write(mr, addr, tmp, size);
 457     mr->ops->write(mr->opaque, addr, tmp, size);
 458     return MEMTX_OK;
 459 }
 460
 461 static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr,
 462                                                            hwaddr addr,
 463                                                            uint64_t *value,
 464                                                            unsigned size,
 465                                                            unsigned shift,
 466                                                            uint64_t mask,
 467                                                            MemTxAttrs attrs)
 468 {
 469     uint64_t tmp;
 470
 471     if (mr->flush_coalesced_mmio) {
 472         qemu_flush_coalesced_mmio_buffer();
 473     }
 474     tmp = (*value >> shift) & mask;
 475     trace_memory_region_ops_write(mr, addr, tmp, size);
 476     return mr->ops->write_with_attrs(mr->opaque, addr, tmp, size, attrs);
 477 }
 478
 479 static MemTxResult access_with_adjusted_size(hwaddr addr,
 480                                       uint64_t *value,
 481                                       unsigned size,
 482                                       unsigned access_size_min,
 483                                       unsigned access_size_max,
 484                                       MemTxResult (*access)(MemoryRegion *mr,
 485                                                             hwaddr addr,
 486                                                             uint64_t *value,
 487                                                             unsigned size,
 488                                                             unsigned shift,
 489                                                             uint64_t mask,
 490                                                             MemTxAttrs attrs),
 491                                       MemoryRegion *mr,
 492                                       MemTxAttrs attrs)
 493 {
 494     uint64_t access_mask;
 495     unsigned access_size;
 496     unsigned i;
 497     MemTxResult r = MEMTX_OK;
 498
 499     if (!access_size_min) {
 500         access_size_min = 1;
 501     }
 502     if (!access_size_max) {
 503         access_size_max = 4;
 504     }
 505
 506     /* FIXME: support unaligned access? */
 507     access_size = MAX(MIN(size, access_size_max), access_size_min);
 508     access_mask = -1ULL >> (64 - access_size * 8);
 509     if (memory_region_big_endian(mr)) {
 510         for (i = 0; i < size; i += access_size) {
 511             r |= access(mr, addr + i, value, access_size,
 512                         (size - access_size - i) * 8, access_mask, attrs);
 513         }
 514     } else {
 515         for (i = 0; i < size; i += access_size) {
 516             r |= access(mr, addr + i, value, access_size, i * 8,
 517                         access_mask, attrs);
 518         }
 519     }
 520     return r;
 521 }
 522
 523 static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
 524 {
 525     AddressSpace *as;
 526
 527     while (mr->container) {
 528         mr = mr->container;
 529     }
 530     QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
 531         if (mr == as->root) {
 532             return as;
 533         }
 534     }
 535     return NULL;
 536 }
 537
 538 /* Render a memory region into the global view.  Ranges in @view obscure
 539  * ranges in @mr.
 540  */
 541 static void render_memory_region(FlatView *view,
 542                                  MemoryRegion *mr,
 543                                  Int128 base,
 544                                  AddrRange clip,
 545                                  bool readonly)
 546 {
 547     MemoryRegion *subregion;
 548     unsigned i;
 549     hwaddr offset_in_region;
 550     Int128 remain;
 551     Int128 now;
 552     FlatRange fr;
 553     AddrRange tmp;
 554
 555     if (!mr->enabled) {
 556         return;
 557     }
 558
 559     int128_addto(&base, int128_make64(mr->addr));
 560     readonly |= mr->readonly;
 561
 562     tmp = addrrange_make(base, mr->size);
 563
 564     if (!addrrange_intersects(tmp, clip)) {
 565         return;
 566     }
 567
 568     clip = addrrange_intersection(tmp, clip);
 569
 570     if (mr->alias) {
 571         int128_subfrom(&base, int128_make64(mr->alias->addr));
 572         int128_subfrom(&base, int128_make64(mr->alias_offset));
 573         render_memory_region(view, mr->alias, base, clip, readonly);
 574         return;
 575     }
 576
 577     /* Render subregions in priority order. */
 578     QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
 579         render_memory_region(view, subregion, base, clip, readonly);
 580     }
 581
 582     if (!mr->terminates) {
 583         return;
 584     }
 585
 586     offset_in_region = int128_get64(int128_sub(clip.start, base));
 587     base = clip.start;
 588     remain = clip.size;
 589
 590     fr.mr = mr;
 591     fr.dirty_log_mask = mr->dirty_log_mask;
 592     fr.romd_mode = mr->romd_mode;
 593     fr.readonly = readonly;
 594
 595     /* Render the region itself into any gaps left by the current view. */
 596     for (i = 0; i < view->nr && int128_nz(remain); ++i) {
 597         if (int128_ge(base, addrrange_end(view->ranges[i].addr))) {
 598             continue;
 599         }
 600         if (int128_lt(base, view->ranges[i].addr.start)) {
 601             now = int128_min(remain,
 602                              int128_sub(view->ranges[i].addr.start, base));
 603             fr.offset_in_region = offset_in_region;
 604             fr.addr = addrrange_make(base, now);
 605             flatview_insert(view, i, &fr);
 606             ++i;
 607             int128_addto(&base, now);
 608             offset_in_region += int128_get64(now);
 609             int128_subfrom(&remain, now);
 610         }
 611         now = int128_sub(int128_min(int128_add(base, remain),
 612                                     addrrange_end(view->ranges[i].addr)),
 613                          base);
 614         int128_addto(&base, now);
 615         offset_in_region += int128_get64(now);
 616         int128_subfrom(&remain, now);
 617     }
 618     if (int128_nz(remain)) {
 619         fr.offset_in_region = offset_in_region;
 620         fr.addr = addrrange_make(base, remain);
 621         flatview_insert(view, i, &fr);
 622     }
 623 }
 624
 625 /* Render a memory topology into a list of disjoint absolute ranges. */
 626 static FlatView *generate_memory_topology(MemoryRegion *mr)
 627 {
 628     FlatView *view;
 629
 630     view = g_new(FlatView, 1);
 631     flatview_init(view);
 632
 633     if (mr) {
 634         render_memory_region(view, mr, int128_zero(),
 635                              addrrange_make(int128_zero(), int128_2_64()), false);
 636     }
 637     flatview_simplify(view);
 638
 639     return view;
 640 }
 641
 642 static void address_space_add_del_ioeventfds(AddressSpace *as,
 643                                              MemoryRegionIoeventfd *fds_new,
 644                                              unsigned fds_new_nb,
 645                                              MemoryRegionIoeventfd *fds_old,
 646                                              unsigned fds_old_nb)
 647 {
 648     unsigned iold, inew;
 649     MemoryRegionIoeventfd *fd;
 650     MemoryRegionSection section;
 651
 652     /* Generate a symmetric difference of the old and new fd sets, adding
 653      * and deleting as necessary.
 654      */
 655
 656     iold = inew = 0;
 657     while (iold < fds_old_nb || inew < fds_new_nb) {
 658         if (iold < fds_old_nb
 659             && (inew == fds_new_nb
 660                 || memory_region_ioeventfd_before(fds_old[iold],
 661                                                   fds_new[inew]))) {
 662             fd = &fds_old[iold];
 663             section = (MemoryRegionSection) {
 664                 .address_space = as,
 665                 .offset_within_address_space = int128_get64(fd->addr.start),
 666                 .size = fd->addr.size,
 667             };
 668             MEMORY_LISTENER_CALL(eventfd_del, Forward, &section,
 669                                  fd->match_data, fd->data, fd->e);
 670             ++iold;
 671         } else if (inew < fds_new_nb
 672                    && (iold == fds_old_nb
 673                        || memory_region_ioeventfd_before(fds_new[inew],
 674                                                          fds_old[iold]))) {
 675             fd = &fds_new[inew];
 676             section = (MemoryRegionSection) {
 677                 .address_space = as,
 678                 .offset_within_address_space = int128_get64(fd->addr.start),
 679                 .size = fd->addr.size,
 680             };
 681             MEMORY_LISTENER_CALL(eventfd_add, Reverse, &section,
 682                                  fd->match_data, fd->data, fd->e);
 683             ++inew;
 684         } else {
 685             ++iold;
 686             ++inew;
 687         }
 688     }
 689 }
 690
 691 static FlatView *address_space_get_flatview(AddressSpace *as)
 692 {
 693     FlatView *view;
 694
 695     rcu_read_lock();
 696     view = atomic_rcu_read(&as->current_map);
 697     flatview_ref(view);
 698     rcu_read_unlock();
 699     return view;
 700 }
 701
 702 static void address_space_update_ioeventfds(AddressSpace *as)
 703 {
 704     FlatView *view;
 705     FlatRange *fr;
 706     unsigned ioeventfd_nb = 0;
 707     MemoryRegionIoeventfd *ioeventfds = NULL;
 708     AddrRange tmp;
 709     unsigned i;
 710
 711     view = address_space_get_flatview(as);
 712     FOR_EACH_FLAT_RANGE(fr, view) {
 713         for (i = 0; i < fr->mr->ioeventfd_nb; ++i) {
 714             tmp = addrrange_shift(fr->mr->ioeventfds[i].addr,
 715                                   int128_sub(fr->addr.start,
 716                                              int128_make64(fr->offset_in_region)));
 717             if (addrrange_intersects(fr->addr, tmp)) {
 718                 ++ioeventfd_nb;
 719                 ioeventfds = g_realloc(ioeventfds,
 720                                           ioeventfd_nb * sizeof(*ioeventfds));
 721                 ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i];
 722                 ioeventfds[ioeventfd_nb-1].addr = tmp;
 723             }
 724         }
 725     }
 726
 727     address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb,
 728                                      as->ioeventfds, as->ioeventfd_nb);
 729
 730     g_free(as->ioeventfds);
 731     as->ioeventfds = ioeventfds;
 732     as->ioeventfd_nb = ioeventfd_nb;
 733     flatview_unref(view);
 734 }
 735
 736 static void address_space_update_topology_pass(AddressSpace *as,
 737                                                const FlatView *old_view,
 738                                                const FlatView *new_view,
 739                                                bool adding)
 740 {
 741     unsigned iold, inew;
 742     FlatRange *frold, *frnew;
 743
 744     /* Generate a symmetric difference of the old and new memory maps.
 745      * Kill ranges in the old map, and instantiate ranges in the new map.
 746      */
 747     iold = inew = 0;
 748     while (iold < old_view->nr || inew < new_view->nr) {
 749         if (iold < old_view->nr) {
 750             frold = &old_view->ranges[iold];
 751         } else {
 752             frold = NULL;
 753         }
 754         if (inew < new_view->nr) {
 755             frnew = &new_view->ranges[inew];
 756         } else {
 757             frnew = NULL;
 758         }
 759
 760         if (frold
 761             && (!frnew
 762                 || int128_lt(frold->addr.start, frnew->addr.start)
 763                 || (int128_eq(frold->addr.start, frnew->addr.start)
 764                     && !flatrange_equal(frold, frnew)))) {
 765             /* In old but not in new, or in both but attributes changed. */
 766
 767             if (!adding) {
 768                 MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del);
 769             }
 770
 771             ++iold;
 772         } else if (frold && frnew && flatrange_equal(frold, frnew)) {
 773             /* In both and unchanged (except logging may have changed) */
 774
 775             if (adding) {
 776                 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop);
 777                 if (frold->dirty_log_mask && !frnew->dirty_log_mask) {
 778                     MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop);
 779                 } else if (frnew->dirty_log_mask && !frold->dirty_log_mask) {
 780                     MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start);
 781                 }
 782             }
 783
 784             ++iold;
 785             ++inew;
 786         } else {
 787             /* In new */
 788
 789             if (adding) {
 790                 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add);
 791             }
 792
 793             ++inew;
 794         }
 795     }
 796 }
 797
 798
 799 static void address_space_update_topology(AddressSpace *as)
 800 {
 801     FlatView *old_view = address_space_get_flatview(as);
 802     FlatView *new_view = generate_memory_topology(as->root);
 803
 804     address_space_update_topology_pass(as, old_view, new_view, false);
 805     address_space_update_topology_pass(as, old_view, new_view, true);
 806
 807     /* Writes are protected by the BQL.  */
 808     atomic_rcu_set(&as->current_map, new_view);
 809     call_rcu(old_view, flatview_unref, rcu);
 810
 811     /* Note that all the old MemoryRegions are still alive up to this
 812      * point.  This relieves most MemoryListeners from the need to
 813      * ref/unref the MemoryRegions they get---unless they use them
 814      * outside the iothread mutex, in which case precise reference
 815      * counting is necessary.
 816      */
 817     flatview_unref(old_view);
 818
 819     address_space_update_ioeventfds(as);
 820 }
 821
 822 void memory_region_transaction_begin(void)
 823 {
 824     qemu_flush_coalesced_mmio_buffer();
 825     ++memory_region_transaction_depth;
 826 }
 827
 828 static void memory_region_clear_pending(void)
 829 {
 830     memory_region_update_pending = false;
 831     ioeventfd_update_pending = false;
 832 }
 833
 834 void memory_region_transaction_commit(void)
 835 {
 836     AddressSpace *as;
 837
 838     assert(memory_region_transaction_depth);
 839     --memory_region_transaction_depth;
 840     if (!memory_region_transaction_depth) {
 841         if (memory_region_update_pending) {
 842             MEMORY_LISTENER_CALL_GLOBAL(begin, Forward);
 843
 844             QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
 845                 address_space_update_topology(as);
 846             }
 847
 848             MEMORY_LISTENER_CALL_GLOBAL(commit, Forward);
 849         } else if (ioeventfd_update_pending) {
 850             QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
 851                 address_space_update_ioeventfds(as);
 852             }
 853         }
 854         memory_region_clear_pending();
 855    }
 856 }
 857
 858 static void memory_region_destructor_none(MemoryRegion *mr)
 859 {
 860 }
 861
 862 static void memory_region_destructor_ram(MemoryRegion *mr)
 863 {
 864     qemu_ram_free(mr->ram_addr);
 865 }
 866
 867 static void memory_region_destructor_alias(MemoryRegion *mr)
 868 {
 869     memory_region_unref(mr->alias);
 870 }
 871
 872 static void memory_region_destructor_ram_from_ptr(MemoryRegion *mr)
 873 {
 874     qemu_ram_free_from_ptr(mr->ram_addr);
 875 }
 876
 877 static void memory_region_destructor_rom_device(MemoryRegion *mr)
 878 {
 879     qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK);
 880 }
 881
 882 static bool memory_region_need_escape(char c)
 883 {
 884     return c == '/' || c == '[' || c == '\\' || c == ']';
 885 }
 886
 887 static char *memory_region_escape_name(const char *name)
 888 {
 889     const char *p;
 890     char *escaped, *q;
 891     uint8_t c;
 892     size_t bytes = 0;
 893
 894     for (p = name; *p; p++) {
 895         bytes += memory_region_need_escape(*p) ? 4 : 1;
 896     }
 897     if (bytes == p - name) {
 898        return g_memdup(name, bytes + 1);
 899     }
 900
 901     escaped = g_malloc(bytes + 1);
 902     for (p = name, q = escaped; *p; p++) {
 903         c = *p;
 904         if (unlikely(memory_region_need_escape(c))) {
 905             *q++ = '\\';
 906             *q++ = 'x';
 907             *q++ = "0123456789abcdef"[c >> 4];
 908             c = "0123456789abcdef"[c & 15];
 909         }
 910         *q++ = c;
 911     }
 912     *q = 0;
 913     return escaped;
 914 }
 915
 916 void memory_region_init(MemoryRegion *mr,
 917                         Object *owner,
 918                         const char *name,
 919                         uint64_t size)
 920 {
 921     if (!owner) {
 922         owner = container_get(qdev_get_machine(), "/unattached");
 923     }
 924
 925     object_initialize(mr, sizeof(*mr), TYPE_MEMORY_REGION);
 926     mr->size = int128_make64(size);
 927     if (size == UINT64_MAX) {
 928         mr->size = int128_2_64();
 929     }
 930     mr->name = g_strdup(name);
 931
 932     if (name) {
 933         char *escaped_name = memory_region_escape_name(name);
 934         char *name_array = g_strdup_printf("%s[*]", escaped_name);
 935         object_property_add_child(owner, name_array, OBJECT(mr), &error_abort);
 936         object_unref(OBJECT(mr));
 937         g_free(name_array);
 938         g_free(escaped_name);
 939     }
 940 }
 941
 942 static void memory_region_get_addr(Object *obj, Visitor *v, void *opaque,
 943                                    const char *name, Error **errp)
 944 {
 945     MemoryRegion *mr = MEMORY_REGION(obj);
 946     uint64_t value = mr->addr;
 947
 948     visit_type_uint64(v, &value, name, errp);
 949 }
 950
 951 static void memory_region_get_container(Object *obj, Visitor *v, void *opaque,
 952                                         const char *name, Error **errp)
 953 {
 954     MemoryRegion *mr = MEMORY_REGION(obj);
 955     gchar *path = (gchar *)"";
 956
 957     if (mr->container) {
 958         path = object_get_canonical_path(OBJECT(mr->container));
 959     }
 960     visit_type_str(v, &path, name, errp);
 961     if (mr->container) {
 962         g_free(path);
 963     }
 964 }
 965
 966 static Object *memory_region_resolve_container(Object *obj, void *opaque,
 967                                                const char *part)
 968 {
 969     MemoryRegion *mr = MEMORY_REGION(obj);
 970
 971     return OBJECT(mr->container);
 972 }
 973
 974 static void memory_region_get_priority(Object *obj, Visitor *v, void *opaque,
 975                                        const char *name, Error **errp)
 976 {
 977     MemoryRegion *mr = MEMORY_REGION(obj);
 978     int32_t value = mr->priority;
 979
 980     visit_type_int32(v, &value, name, errp);
 981 }
 982
 983 static bool memory_region_get_may_overlap(Object *obj, Error **errp)
 984 {
 985     MemoryRegion *mr = MEMORY_REGION(obj);
 986
 987     return mr->may_overlap;
 988 }
 989
 990 static void memory_region_get_size(Object *obj, Visitor *v, void *opaque,
 991                                    const char *name, Error **errp)
 992 {
 993     MemoryRegion *mr = MEMORY_REGION(obj);
 994     uint64_t value = memory_region_size(mr);
 995
 996     visit_type_uint64(v, &value, name, errp);
 997 }
 998
 999 static void memory_region_initfn(Object *obj)
1000 {
1001     MemoryRegion *mr = MEMORY_REGION(obj);
1002     ObjectProperty *op;
1003
1004     mr->ops = &unassigned_mem_ops;
1005     mr->enabled = true;
1006     mr->romd_mode = true;
1007     mr->destructor = memory_region_destructor_none;
1008     QTAILQ_INIT(&mr->subregions);
1009     QTAILQ_INIT(&mr->coalesced);
1010
1011     op = object_property_add(OBJECT(mr), "container",
1012                              "link<" TYPE_MEMORY_REGION ">",
1013                              memory_region_get_container,
1014                              NULL, /* memory_region_set_container */
1015                              NULL, NULL, &error_abort);
1016     op->resolve = memory_region_resolve_container;
1017
1018     object_property_add(OBJECT(mr), "addr", "uint64",
1019                         memory_region_get_addr,
1020                         NULL, /* memory_region_set_addr */
1021                         NULL, NULL, &error_abort);
1022     object_property_add(OBJECT(mr), "priority", "uint32",
1023                         memory_region_get_priority,
1024                         NULL, /* memory_region_set_priority */
1025                         NULL, NULL, &error_abort);
1026     object_property_add_bool(OBJECT(mr), "may-overlap",
1027                              memory_region_get_may_overlap,
1028                              NULL, /* memory_region_set_may_overlap */
1029                              &error_abort);
1030     object_property_add(OBJECT(mr), "size", "uint64",
1031                         memory_region_get_size,
1032                         NULL, /* memory_region_set_size, */
1033                         NULL, NULL, &error_abort);
1034 }
1035
1036 static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
1037                                     unsigned size)
1038 {
1039 #ifdef DEBUG_UNASSIGNED
1040     printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
1041 #endif
1042     if (current_cpu != NULL) {
1043         cpu_unassigned_access(current_cpu, addr, false, false, 0, size);
1044     }
1045     return 0;
1046 }
1047
1048 static void unassigned_mem_write(void *opaque, hwaddr addr,
1049                                  uint64_t val, unsigned size)
1050 {
1051 #ifdef DEBUG_UNASSIGNED
1052     printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val);
1053 #endif
1054     if (current_cpu != NULL) {
1055         cpu_unassigned_access(current_cpu, addr, true, false, 0, size);
1056     }
1057 }
1058
1059 static bool unassigned_mem_accepts(void *opaque, hwaddr addr,
1060                                    unsigned size, bool is_write)
1061 {
1062     return false;
1063 }
1064
1065 const MemoryRegionOps unassigned_mem_ops = {
1066     .valid.accepts = unassigned_mem_accepts,
1067     .endianness = DEVICE_NATIVE_ENDIAN,
1068 };
1069
1070 bool memory_region_access_valid(MemoryRegion *mr,
1071                                 hwaddr addr,
1072                                 unsigned size,
1073                                 bool is_write)
1074 {
1075     int access_size_min, access_size_max;
1076     int access_size, i;
1077
1078     if (!mr->ops->valid.unaligned && (addr & (size - 1))) {
1079         return false;
1080     }
1081
1082     if (!mr->ops->valid.accepts) {
1083         return true;
1084     }
1085
1086     access_size_min = mr->ops->valid.min_access_size;
1087     if (!mr->ops->valid.min_access_size) {
1088         access_size_min = 1;
1089     }
1090
1091     access_size_max = mr->ops->valid.max_access_size;
1092     if (!mr->ops->valid.max_access_size) {
1093         access_size_max = 4;
1094     }
1095
1096     access_size = MAX(MIN(size, access_size_max), access_size_min);
1097     for (i = 0; i < size; i += access_size) {
1098         if (!mr->ops->valid.accepts(mr->opaque, addr + i, access_size,
1099                                     is_write)) {
1100             return false;
1101         }
1102     }
1103
1104     return true;
1105 }
1106
1107 static MemTxResult memory_region_dispatch_read1(MemoryRegion *mr,
1108                                                 hwaddr addr,
1109                                                 uint64_t *pval,
1110                                                 unsigned size,
1111                                                 MemTxAttrs attrs)
1112 {
1113     *pval = 0;
1114
1115     if (mr->ops->read) {
1116         return access_with_adjusted_size(addr, pval, size,
1117                                          mr->ops->impl.min_access_size,
1118                                          mr->ops->impl.max_access_size,
1119                                          memory_region_read_accessor,
1120                                          mr, attrs);
1121     } else if (mr->ops->read_with_attrs) {
1122         return access_with_adjusted_size(addr, pval, size,
1123                                          mr->ops->impl.min_access_size,
1124                                          mr->ops->impl.max_access_size,
1125                                          memory_region_read_with_attrs_accessor,
1126                                          mr, attrs);
1127     } else {
1128         return access_with_adjusted_size(addr, pval, size, 1, 4,
1129                                          memory_region_oldmmio_read_accessor,
1130                                          mr, attrs);
1131     }
1132 }
1133
1134 MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
1135                                         hwaddr addr,
1136                                         uint64_t *pval,
1137                                         unsigned size,
1138                                         MemTxAttrs attrs)
1139 {
1140     MemTxResult r;
1141
1142     if (!memory_region_access_valid(mr, addr, size, false)) {
1143         *pval = unassigned_mem_read(mr, addr, size);
1144         return MEMTX_DECODE_ERROR;
1145     }
1146
1147     r = memory_region_dispatch_read1(mr, addr, pval, size, attrs);
1148     adjust_endianness(mr, pval, size);
1149     return r;
1150 }
1151
1152 MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
1153                                          hwaddr addr,
1154                                          uint64_t data,
1155                                          unsigned size,
1156                                          MemTxAttrs attrs)
1157 {
1158     if (!memory_region_access_valid(mr, addr, size, true)) {
1159         unassigned_mem_write(mr, addr, data, size);
1160         return MEMTX_DECODE_ERROR;
1161     }
1162
1163     adjust_endianness(mr, &data, size);
1164
1165     if (mr->ops->write) {
1166         return access_with_adjusted_size(addr, &data, size,
1167                                          mr->ops->impl.min_access_size,
1168                                          mr->ops->impl.max_access_size,
1169                                          memory_region_write_accessor, mr,
1170                                          attrs);
1171     } else if (mr->ops->write_with_attrs) {
1172         return
1173             access_with_adjusted_size(addr, &data, size,
1174                                       mr->ops->impl.min_access_size,
1175                                       mr->ops->impl.max_access_size,
1176                                       memory_region_write_with_attrs_accessor,
1177                                       mr, attrs);
1178     } else {
1179         return access_with_adjusted_size(addr, &data, size, 1, 4,
1180                                          memory_region_oldmmio_write_accessor,
1181                                          mr, attrs);
1182     }
1183 }
1184
1185 void memory_region_init_io(MemoryRegion *mr,
1186                            Object *owner,
1187                            const MemoryRegionOps *ops,
1188                            void *opaque,
1189                            const char *name,
1190                            uint64_t size)
1191 {
1192     memory_region_init(mr, owner, name, size);
1193     mr->ops = ops;
1194     mr->opaque = opaque;
1195     mr->terminates = true;
1196     mr->ram_addr = ~(ram_addr_t)0;
1197 }
1198
1199 void memory_region_init_ram(MemoryRegion *mr,
1200                             Object *owner,
1201                             const char *name,
1202                             uint64_t size,
1203                             Error **errp)
1204 {
1205     memory_region_init(mr, owner, name, size);
1206     mr->ram = true;
1207     mr->terminates = true;
1208     mr->destructor = memory_region_destructor_ram;
1209     mr->ram_addr = qemu_ram_alloc(size, mr, errp);
1210 }
1211
1212 void memory_region_init_resizeable_ram(MemoryRegion *mr,
1213                                        Object *owner,
1214                                        const char *name,
1215                                        uint64_t size,
1216                                        uint64_t max_size,
1217                                        void (*resized)(const char*,
1218                                                        uint64_t length,
1219                                                        void *host),
1220                                        Error **errp)
1221 {
1222     memory_region_init(mr, owner, name, size);
1223     mr->ram = true;
1224     mr->terminates = true;
1225     mr->destructor = memory_region_destructor_ram;
1226     mr->ram_addr = qemu_ram_alloc_resizeable(size, max_size, resized, mr, errp);
1227 }
1228
1229 #ifdef __linux__
1230 void memory_region_init_ram_from_file(MemoryRegion *mr,
1231                                       struct Object *owner,
1232                                       const char *name,
1233                                       uint64_t size,
1234                                       bool share,
1235                                       const char *path,
1236                                       Error **errp)
1237 {
1238     memory_region_init(mr, owner, name, size);
1239     mr->ram = true;
1240     mr->terminates = true;
1241     mr->destructor = memory_region_destructor_ram;
1242     mr->ram_addr = qemu_ram_alloc_from_file(size, mr, share, path, errp);
1243 }
1244 #endif
1245
1246 void memory_region_init_ram_ptr(MemoryRegion *mr,
1247                                 Object *owner,
1248                                 const char *name,
1249                                 uint64_t size,
1250                                 void *ptr)
1251 {
1252     memory_region_init(mr, owner, name, size);
1253     mr->ram = true;
1254     mr->terminates = true;
1255     mr->destructor = memory_region_destructor_ram_from_ptr;
1256
1257     /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL.  */
1258     assert(ptr != NULL);
1259     mr->ram_addr = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_abort);
1260 }
1261
1262 void memory_region_set_skip_dump(MemoryRegion *mr)
1263 {
1264     mr->skip_dump = true;
1265 }
1266
1267 void memory_region_init_alias(MemoryRegion *mr,
1268                               Object *owner,
1269                               const char *name,
1270                               MemoryRegion *orig,
1271                               hwaddr offset,
1272                               uint64_t size)
1273 {
1274     memory_region_init(mr, owner, name, size);
1275     memory_region_ref(orig);
1276     mr->destructor = memory_region_destructor_alias;
1277     mr->alias = orig;
1278     mr->alias_offset = offset;
1279 }
1280
1281 void memory_region_init_rom_device(MemoryRegion *mr,
1282                                    Object *owner,
1283                                    const MemoryRegionOps *ops,
1284                                    void *opaque,
1285                                    const char *name,
1286                                    uint64_t size,
1287                                    Error **errp)
1288 {
1289     memory_region_init(mr, owner, name, size);
1290     mr->ops = ops;
1291     mr->opaque = opaque;
1292     mr->terminates = true;
1293     mr->rom_device = true;
1294     mr->destructor = memory_region_destructor_rom_device;
1295     mr->ram_addr = qemu_ram_alloc(size, mr, errp);
1296 }
1297
1298 void memory_region_init_iommu(MemoryRegion *mr,
1299                               Object *owner,
1300                               const MemoryRegionIOMMUOps *ops,
1301                               const char *name,
1302                               uint64_t size)
1303 {
1304     memory_region_init(mr, owner, name, size);
1305     mr->iommu_ops = ops,
1306     mr->terminates = true;  /* then re-forwards */
1307     notifier_list_init(&mr->iommu_notify);
1308 }
1309
1310 void memory_region_init_reservation(MemoryRegion *mr,
1311                                     Object *owner,
1312                                     const char *name,
1313                                     uint64_t size)
1314 {
1315     memory_region_init_io(mr, owner, &unassigned_mem_ops, mr, name, size);
1316 }
1317
1318 static void memory_region_finalize(Object *obj)
1319 {
1320     MemoryRegion *mr = MEMORY_REGION(obj);
1321
1322     assert(QTAILQ_EMPTY(&mr->subregions));
1323     mr->destructor(mr);
1324     memory_region_clear_coalescing(mr);
1325     g_free((char *)mr->name);
1326     g_free(mr->ioeventfds);
1327 }
1328
1329 Object *memory_region_owner(MemoryRegion *mr)
1330 {
1331     Object *obj = OBJECT(mr);
1332     return obj->parent;
1333 }
1334
1335 void memory_region_ref(MemoryRegion *mr)
1336 {
1337     /* MMIO callbacks most likely will access data that belongs
1338      * to the owner, hence the need to ref/unref the owner whenever
1339      * the memory region is in use.
1340      *
1341      * The memory region is a child of its owner.  As long as the
1342      * owner doesn't call unparent itself on the memory region,
1343      * ref-ing the owner will also keep the memory region alive.
1344      * Memory regions without an owner are supposed to never go away,
1345      * but we still ref/unref them for debugging purposes.
1346      */
1347     Object *obj = OBJECT(mr);
1348     if (obj && obj->parent) {
1349         object_ref(obj->parent);
1350     } else {
1351         object_ref(obj);
1352     }
1353 }
1354
1355 void memory_region_unref(MemoryRegion *mr)
1356 {
1357     Object *obj = OBJECT(mr);
1358     if (obj && obj->parent) {
1359         object_unref(obj->parent);
1360     } else {
1361         object_unref(obj);
1362     }
1363 }
1364
1365 uint64_t memory_region_size(MemoryRegion *mr)
1366 {
1367     if (int128_eq(mr->size, int128_2_64())) {
1368         return UINT64_MAX;
1369     }
1370     return int128_get64(mr->size);
1371 }
1372
1373 const char *memory_region_name(const MemoryRegion *mr)
1374 {
1375     if (!mr->name) {
1376         ((MemoryRegion *)mr)->name =
1377             object_get_canonical_path_component(OBJECT(mr));
1378     }
1379     return mr->name;
1380 }
1381
1382 bool memory_region_is_ram(MemoryRegion *mr)
1383 {
1384     return mr->ram;
1385 }
1386
1387 bool memory_region_is_skip_dump(MemoryRegion *mr)
1388 {
1389     return mr->skip_dump;
1390 }
1391
1392 bool memory_region_is_logging(MemoryRegion *mr)
1393 {
1394     return mr->dirty_log_mask;
1395 }
1396
1397 bool memory_region_is_rom(MemoryRegion *mr)
1398 {
1399     return mr->ram && mr->readonly;
1400 }
1401
1402 bool memory_region_is_iommu(MemoryRegion *mr)
1403 {
1404     return mr->iommu_ops;
1405 }
1406
1407 void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n)
1408 {
1409     notifier_list_add(&mr->iommu_notify, n);
1410 }
1411
1412 void memory_region_unregister_iommu_notifier(Notifier *n)
1413 {
1414     notifier_remove(n);
1415 }
1416
1417 void memory_region_notify_iommu(MemoryRegion *mr,
1418                                 IOMMUTLBEntry entry)
1419 {
1420     assert(memory_region_is_iommu(mr));
1421     notifier_list_notify(&mr->iommu_notify, &entry);
1422 }
1423
1424 void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
1425 {
1426     uint8_t mask = 1 << client;
1427
1428     memory_region_transaction_begin();
1429     mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask);
1430     memory_region_update_pending |= mr->enabled;
1431     memory_region_transaction_commit();
1432 }
1433
1434 bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr,
1435                              hwaddr size, unsigned client)
1436 {
1437     assert(mr->terminates);
1438     return cpu_physical_memory_get_dirty(mr->ram_addr + addr, size, client);
1439 }
1440
1441 void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
1442                              hwaddr size)
1443 {
1444     assert(mr->terminates);
1445     cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size);
1446 }
1447
1448 bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,
1449                                         hwaddr size, unsigned client)
1450 {
1451     bool ret;
1452     assert(mr->terminates);
1453     ret = cpu_physical_memory_get_dirty(mr->ram_addr + addr, size, client);
1454     if (ret) {
1455         cpu_physical_memory_reset_dirty(mr->ram_addr + addr, size, client);
1456     }
1457     return ret;
1458 }
1459
1460
1461 void memory_region_sync_dirty_bitmap(MemoryRegion *mr)
1462 {
1463     AddressSpace *as;
1464     FlatRange *fr;
1465
1466     QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1467         FlatView *view = address_space_get_flatview(as);
1468         FOR_EACH_FLAT_RANGE(fr, view) {
1469             if (fr->mr == mr) {
1470                 MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
1471             }
1472         }
1473         flatview_unref(view);
1474     }
1475 }
1476
1477 void memory_region_set_readonly(MemoryRegion *mr, bool readonly)
1478 {
1479     if (mr->readonly != readonly) {
1480         memory_region_transaction_begin();
1481         mr->readonly = readonly;
1482         memory_region_update_pending |= mr->enabled;
1483         memory_region_transaction_commit();
1484     }
1485 }
1486
1487 void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode)
1488 {
1489     if (mr->romd_mode != romd_mode) {
1490         memory_region_transaction_begin();
1491         mr->romd_mode = romd_mode;
1492         memory_region_update_pending |= mr->enabled;
1493         memory_region_transaction_commit();
1494     }
1495 }
1496
1497 void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
1498                                hwaddr size, unsigned client)
1499 {
1500     assert(mr->terminates);
1501     cpu_physical_memory_reset_dirty(mr->ram_addr + addr, size, client);
1502 }
1503
1504 int memory_region_get_fd(MemoryRegion *mr)
1505 {
1506     if (mr->alias) {
1507         return memory_region_get_fd(mr->alias);
1508     }
1509
1510     assert(mr->terminates);
1511
1512     return qemu_get_ram_fd(mr->ram_addr & TARGET_PAGE_MASK);
1513 }
1514
1515 void *memory_region_get_ram_ptr(MemoryRegion *mr)
1516 {
1517     if (mr->alias) {
1518         return memory_region_get_ram_ptr(mr->alias) + mr->alias_offset;
1519     }
1520
1521     assert(mr->terminates);
1522
1523     return qemu_get_ram_ptr(mr->ram_addr & TARGET_PAGE_MASK);
1524 }
1525
1526 void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, Error **errp)
1527 {
1528     assert(mr->terminates);
1529
1530     qemu_ram_resize(mr->ram_addr, newsize, errp);
1531 }
1532
1533 static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpace *as)
1534 {
1535     FlatView *view;
1536     FlatRange *fr;
1537     CoalescedMemoryRange *cmr;
1538     AddrRange tmp;
1539     MemoryRegionSection section;
1540
1541     view = address_space_get_flatview(as);
1542     FOR_EACH_FLAT_RANGE(fr, view) {
1543         if (fr->mr == mr) {
1544             section = (MemoryRegionSection) {
1545                 .address_space = as,
1546                 .offset_within_address_space = int128_get64(fr->addr.start),
1547                 .size = fr->addr.size,
1548             };
1549
1550             MEMORY_LISTENER_CALL(coalesced_mmio_del, Reverse, &section,
1551                                  int128_get64(fr->addr.start),
1552                                  int128_get64(fr->addr.size));
1553             QTAILQ_FOREACH(cmr, &mr->coalesced, link) {
1554                 tmp = addrrange_shift(cmr->addr,
1555                                       int128_sub(fr->addr.start,
1556                                                  int128_make64(fr->offset_in_region)));
1557                 if (!addrrange_intersects(tmp, fr->addr)) {
1558                     continue;
1559                 }
1560                 tmp = addrrange_intersection(tmp, fr->addr);
1561                 MEMORY_LISTENER_CALL(coalesced_mmio_add, Forward, &section,
1562                                      int128_get64(tmp.start),
1563                                      int128_get64(tmp.size));
1564             }
1565         }
1566     }
1567     flatview_unref(view);
1568 }
1569
1570 static void memory_region_update_coalesced_range(MemoryRegion *mr)
1571 {
1572     AddressSpace *as;
1573
1574     QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1575         memory_region_update_coalesced_range_as(mr, as);
1576     }
1577 }
1578
1579 void memory_region_set_coalescing(MemoryRegion *mr)
1580 {
1581     memory_region_clear_coalescing(mr);
1582     memory_region_add_coalescing(mr, 0, int128_get64(mr->size));
1583 }
1584
1585 void memory_region_add_coalescing(MemoryRegion *mr,
1586                                   hwaddr offset,
1587                                   uint64_t size)
1588 {
1589     CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr));
1590
1591     cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size));
1592     QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link);
1593     memory_region_update_coalesced_range(mr);
1594     memory_region_set_flush_coalesced(mr);
1595 }
1596
1597 void memory_region_clear_coalescing(MemoryRegion *mr)
1598 {
1599     CoalescedMemoryRange *cmr;
1600     bool updated = false;
1601
1602     qemu_flush_coalesced_mmio_buffer();
1603     mr->flush_coalesced_mmio = false;
1604
1605     while (!QTAILQ_EMPTY(&mr->coalesced)) {
1606         cmr = QTAILQ_FIRST(&mr->coalesced);
1607         QTAILQ_REMOVE(&mr->coalesced, cmr, link);
1608         g_free(cmr);
1609         updated = true;
1610     }
1611
1612     if (updated) {
1613         memory_region_update_coalesced_range(mr);
1614     }
1615 }
1616
1617 void memory_region_set_flush_coalesced(MemoryRegion *mr)
1618 {
1619     mr->flush_coalesced_mmio = true;
1620 }
1621
1622 void memory_region_clear_flush_coalesced(MemoryRegion *mr)
1623 {
1624     qemu_flush_coalesced_mmio_buffer();
1625     if (QTAILQ_EMPTY(&mr->coalesced)) {
1626         mr->flush_coalesced_mmio = false;
1627     }
1628 }
1629
1630 void memory_region_add_eventfd(MemoryRegion *mr,
1631                                hwaddr addr,
1632                                unsigned size,
1633                                bool match_data,
1634                                uint64_t data,
1635                                EventNotifier *e)
1636 {
1637     MemoryRegionIoeventfd mrfd = {
1638         .addr.start = int128_make64(addr),
1639         .addr.size = int128_make64(size),
1640         .match_data = match_data,
1641         .data = data,
1642         .e = e,
1643     };
1644     unsigned i;
1645
1646     adjust_endianness(mr, &mrfd.data, size);
1647     memory_region_transaction_begin();
1648     for (i = 0; i < mr->ioeventfd_nb; ++i) {
1649         if (memory_region_ioeventfd_before(mrfd, mr->ioeventfds[i])) {
1650             break;
1651         }
1652     }
1653     ++mr->ioeventfd_nb;
1654     mr->ioeventfds = g_realloc(mr->ioeventfds,
1655                                   sizeof(*mr->ioeventfds) * mr->ioeventfd_nb);
1656     memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i],
1657             sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i));
1658     mr->ioeventfds[i] = mrfd;
1659     ioeventfd_update_pending |= mr->enabled;
1660     memory_region_transaction_commit();
1661 }
1662
1663 void memory_region_del_eventfd(MemoryRegion *mr,
1664                                hwaddr addr,
1665                                unsigned size,
1666                                bool match_data,
1667                                uint64_t data,
1668                                EventNotifier *e)
1669 {
1670     MemoryRegionIoeventfd mrfd = {
1671         .addr.start = int128_make64(addr),
1672         .addr.size = int128_make64(size),
1673         .match_data = match_data,
1674         .data = data,
1675         .e = e,
1676     };
1677     unsigned i;
1678
1679     adjust_endianness(mr, &mrfd.data, size);
1680     memory_region_transaction_begin();
1681     for (i = 0; i < mr->ioeventfd_nb; ++i) {
1682         if (memory_region_ioeventfd_equal(mrfd, mr->ioeventfds[i])) {
1683             break;
1684         }
1685     }
1686     assert(i != mr->ioeventfd_nb);
1687     memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1],
1688             sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1)));
1689     --mr->ioeventfd_nb;
1690     mr->ioeventfds = g_realloc(mr->ioeventfds,
1691                                   sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1);
1692     ioeventfd_update_pending |= mr->enabled;
1693     memory_region_transaction_commit();
1694 }
1695
1696 static void memory_region_update_container_subregions(MemoryRegion *subregion)
1697 {
1698     hwaddr offset = subregion->addr;
1699     MemoryRegion *mr = subregion->container;
1700     MemoryRegion *other;
1701
1702     memory_region_transaction_begin();
1703
1704     memory_region_ref(subregion);
1705     QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
1706         if (subregion->may_overlap || other->may_overlap) {
1707             continue;
1708         }
1709         if (int128_ge(int128_make64(offset),
1710                       int128_add(int128_make64(other->addr), other->size))
1711             || int128_le(int128_add(int128_make64(offset), subregion->size),
1712                          int128_make64(other->addr))) {
1713             continue;
1714         }
1715 #if 0
1716         printf("warning: subregion collision %llx/%llx (%s) "
1717                "vs %llx/%llx (%s)\n",
1718                (unsigned long long)offset,
1719                (unsigned long long)int128_get64(subregion->size),
1720                subregion->name,
1721                (unsigned long long)other->addr,
1722                (unsigned long long)int128_get64(other->size),
1723                other->name);
1724 #endif
1725     }
1726     QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
1727         if (subregion->priority >= other->priority) {
1728             QTAILQ_INSERT_BEFORE(other, subregion, subregions_link);
1729             goto done;
1730         }
1731     }
1732     QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link);
1733 done:
1734     memory_region_update_pending |= mr->enabled && subregion->enabled;
1735     memory_region_transaction_commit();
1736 }
1737
1738 static void memory_region_add_subregion_common(MemoryRegion *mr,
1739                                                hwaddr offset,
1740                                                MemoryRegion *subregion)
1741 {
1742     assert(!subregion->container);
1743     subregion->container = mr;
1744     subregion->addr = offset;
1745     memory_region_update_container_subregions(subregion);
1746 }
1747
1748 void memory_region_add_subregion(MemoryRegion *mr,
1749                                  hwaddr offset,
1750                                  MemoryRegion *subregion)
1751 {
1752     subregion->may_overlap = false;
1753     subregion->priority = 0;
1754     memory_region_add_subregion_common(mr, offset, subregion);
1755 }
1756
1757 void memory_region_add_subregion_overlap(MemoryRegion *mr,
1758                                          hwaddr offset,
1759                                          MemoryRegion *subregion,
1760                                          int priority)
1761 {
1762     subregion->may_overlap = true;
1763     subregion->priority = priority;
1764     memory_region_add_subregion_common(mr, offset, subregion);
1765 }
1766
1767 void memory_region_del_subregion(MemoryRegion *mr,
1768                                  MemoryRegion *subregion)
1769 {
1770     memory_region_transaction_begin();
1771     assert(subregion->container == mr);
1772     subregion->container = NULL;
1773     QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link);
1774     memory_region_unref(subregion);
1775     memory_region_update_pending |= mr->enabled && subregion->enabled;
1776     memory_region_transaction_commit();
1777 }
1778
1779 void memory_region_set_enabled(MemoryRegion *mr, bool enabled)
1780 {
1781     if (enabled == mr->enabled) {
1782         return;
1783     }
1784     memory_region_transaction_begin();
1785     mr->enabled = enabled;
1786     memory_region_update_pending = true;
1787     memory_region_transaction_commit();
1788 }
1789
1790 void memory_region_set_size(MemoryRegion *mr, uint64_t size)
1791 {
1792     Int128 s = int128_make64(size);
1793
1794     if (size == UINT64_MAX) {
1795         s = int128_2_64();
1796     }
1797     if (int128_eq(s, mr->size)) {
1798         return;
1799     }
1800     memory_region_transaction_begin();
1801     mr->size = s;
1802     memory_region_update_pending = true;
1803     memory_region_transaction_commit();
1804 }
1805
1806 static void memory_region_readd_subregion(MemoryRegion *mr)
1807 {
1808     MemoryRegion *container = mr->container;
1809
1810     if (container) {
1811         memory_region_transaction_begin();
1812         memory_region_ref(mr);
1813         memory_region_del_subregion(container, mr);
1814         mr->container = container;
1815         memory_region_update_container_subregions(mr);
1816         memory_region_unref(mr);
1817         memory_region_transaction_commit();
1818     }
1819 }
1820
1821 void memory_region_set_address(MemoryRegion *mr, hwaddr addr)
1822 {
1823     if (addr != mr->addr) {
1824         mr->addr = addr;
1825         memory_region_readd_subregion(mr);
1826     }
1827 }
1828
1829 void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset)
1830 {
1831     assert(mr->alias);
1832
1833     if (offset == mr->alias_offset) {
1834         return;
1835     }
1836
1837     memory_region_transaction_begin();
1838     mr->alias_offset = offset;
1839     memory_region_update_pending |= mr->enabled;
1840     memory_region_transaction_commit();
1841 }
1842
1843 ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr)
1844 {
1845     return mr->ram_addr;
1846 }
1847
1848 uint64_t memory_region_get_alignment(const MemoryRegion *mr)
1849 {
1850     return mr->align;
1851 }
1852
1853 static int cmp_flatrange_addr(const void *addr_, const void *fr_)
1854 {
1855     const AddrRange *addr = addr_;
1856     const FlatRange *fr = fr_;
1857
1858     if (int128_le(addrrange_end(*addr), fr->addr.start)) {
1859         return -1;
1860     } else if (int128_ge(addr->start, addrrange_end(fr->addr))) {
1861         return 1;
1862     }
1863     return 0;
1864 }
1865
1866 static FlatRange *flatview_lookup(FlatView *view, AddrRange addr)
1867 {
1868     return bsearch(&addr, view->ranges, view->nr,
1869                    sizeof(FlatRange), cmp_flatrange_addr);
1870 }
1871
1872 bool memory_region_present(MemoryRegion *container, hwaddr addr)
1873 {
1874     MemoryRegion *mr = memory_region_find(container, addr, 1).mr;
1875     if (!mr || (mr == container)) {
1876         return false;
1877     }
1878     memory_region_unref(mr);
1879     return true;
1880 }
1881
1882 bool memory_region_is_mapped(MemoryRegion *mr)
1883 {
1884     return mr->container ? true : false;
1885 }
1886
1887 MemoryRegionSection memory_region_find(MemoryRegion *mr,
1888                                        hwaddr addr, uint64_t size)
1889 {
1890     MemoryRegionSection ret = { .mr = NULL };
1891     MemoryRegion *root;
1892     AddressSpace *as;
1893     AddrRange range;
1894     FlatView *view;
1895     FlatRange *fr;
1896
1897     addr += mr->addr;
1898     for (root = mr; root->container; ) {
1899         root = root->container;
1900         addr += root->addr;
1901     }
1902
1903     as = memory_region_to_address_space(root);
1904     if (!as) {
1905         return ret;
1906     }
1907     range = addrrange_make(int128_make64(addr), int128_make64(size));
1908
1909     rcu_read_lock();
1910     view = atomic_rcu_read(&as->current_map);
1911     fr = flatview_lookup(view, range);
1912     if (!fr) {
1913         goto out;
1914     }
1915
1916     while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) {
1917         --fr;
1918     }
1919
1920     ret.mr = fr->mr;
1921     ret.address_space = as;
1922     range = addrrange_intersection(range, fr->addr);
1923     ret.offset_within_region = fr->offset_in_region;
1924     ret.offset_within_region += int128_get64(int128_sub(range.start,
1925                                                         fr->addr.start));
1926     ret.size = range.size;
1927     ret.offset_within_address_space = int128_get64(range.start);
1928     ret.readonly = fr->readonly;
1929     memory_region_ref(ret.mr);
1930 out:
1931     rcu_read_unlock();
1932     return ret;
1933 }
1934
1935 void address_space_sync_dirty_bitmap(AddressSpace *as)
1936 {
1937     FlatView *view;
1938     FlatRange *fr;
1939
1940     view = address_space_get_flatview(as);
1941     FOR_EACH_FLAT_RANGE(fr, view) {
1942         MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
1943     }
1944     flatview_unref(view);
1945 }
1946
1947 void memory_global_dirty_log_start(void)
1948 {
1949     global_dirty_log = true;
1950     MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward);
1951 }
1952
1953 void memory_global_dirty_log_stop(void)
1954 {
1955     global_dirty_log = false;
1956     MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse);
1957 }
1958
1959 static void listener_add_address_space(MemoryListener *listener,
1960                                        AddressSpace *as)
1961 {
1962     FlatView *view;
1963     FlatRange *fr;
1964
1965     if (listener->address_space_filter
1966         && listener->address_space_filter != as) {
1967         return;
1968     }
1969
1970     if (global_dirty_log) {
1971         if (listener->log_global_start) {
1972             listener->log_global_start(listener);
1973         }
1974     }
1975
1976     view = address_space_get_flatview(as);
1977     FOR_EACH_FLAT_RANGE(fr, view) {
1978         MemoryRegionSection section = {
1979             .mr = fr->mr,
1980             .address_space = as,
1981             .offset_within_region = fr->offset_in_region,
1982             .size = fr->addr.size,
1983             .offset_within_address_space = int128_get64(fr->addr.start),
1984             .readonly = fr->readonly,
1985         };
1986         if (listener->region_add) {
1987             listener->region_add(listener, &section);
1988         }
1989     }
1990     flatview_unref(view);
1991 }
1992
1993 void memory_listener_register(MemoryListener *listener, AddressSpace *filter)
1994 {
1995     MemoryListener *other = NULL;
1996     AddressSpace *as;
1997
1998     listener->address_space_filter = filter;
1999     if (QTAILQ_EMPTY(&memory_listeners)
2000         || listener->priority >= QTAILQ_LAST(&memory_listeners,
2001                                              memory_listeners)->priority) {
2002         QTAILQ_INSERT_TAIL(&memory_listeners, listener, link);
2003     } else {
2004         QTAILQ_FOREACH(other, &memory_listeners, link) {
2005             if (listener->priority < other->priority) {
2006                 break;
2007             }
2008         }
2009         QTAILQ_INSERT_BEFORE(other, listener, link);
2010     }
2011
2012     QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
2013         listener_add_address_space(listener, as);
2014     }
2015 }
2016
2017 void memory_listener_unregister(MemoryListener *listener)
2018 {
2019     QTAILQ_REMOVE(&memory_listeners, listener, link);
2020 }
2021
2022 void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name)
2023 {
2024     memory_region_ref(root);
2025     memory_region_transaction_begin();
2026     as->root = root;
2027     as->current_map = g_new(FlatView, 1);
2028     flatview_init(as->current_map);
2029     as->ioeventfd_nb = 0;
2030     as->ioeventfds = NULL;
2031     QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link);
2032     as->name = g_strdup(name ? name : "anonymous");
2033     address_space_init_dispatch(as);
2034     memory_region_update_pending |= root->enabled;
2035     memory_region_transaction_commit();
2036 }
2037
2038 static void do_address_space_destroy(AddressSpace *as)
2039 {
2040     MemoryListener *listener;
2041
2042     address_space_destroy_dispatch(as);
2043
2044     QTAILQ_FOREACH(listener, &memory_listeners, link) {
2045         assert(listener->address_space_filter != as);
2046     }
2047
2048     flatview_unref(as->current_map);
2049     g_free(as->name);
2050     g_free(as->ioeventfds);
2051     memory_region_unref(as->root);
2052 }
2053
2054 void address_space_destroy(AddressSpace *as)
2055 {
2056     MemoryRegion *root = as->root;
2057
2058     /* Flush out anything from MemoryListeners listening in on this */
2059     memory_region_transaction_begin();
2060     as->root = NULL;
2061     memory_region_transaction_commit();
2062     QTAILQ_REMOVE(&address_spaces, as, address_spaces_link);
2063     address_space_unregister(as);
2064
2065     /* At this point, as->dispatch and as->current_map are dummy
2066      * entries that the guest should never use.  Wait for the old
2067      * values to expire before freeing the data.
2068      */
2069     as->root = root;
2070     call_rcu(as, do_address_space_destroy, rcu);
2071 }
2072
2073 typedef struct MemoryRegionList MemoryRegionList;
2074
2075 struct MemoryRegionList {
2076     const MemoryRegion *mr;
2077     QTAILQ_ENTRY(MemoryRegionList) queue;
2078 };
2079
2080 typedef QTAILQ_HEAD(queue, MemoryRegionList) MemoryRegionListHead;
2081
2082 static void mtree_print_mr(fprintf_function mon_printf, void *f,
2083                            const MemoryRegion *mr, unsigned int level,
2084                            hwaddr base,
2085                            MemoryRegionListHead *alias_print_queue)
2086 {
2087     MemoryRegionList *new_ml, *ml, *next_ml;
2088     MemoryRegionListHead submr_print_queue;
2089     const MemoryRegion *submr;
2090     unsigned int i;
2091
2092     if (!mr) {
2093         return;
2094     }
2095
2096     for (i = 0; i < level; i++) {
2097         mon_printf(f, "  ");
2098     }
2099
2100     if (mr->alias) {
2101         MemoryRegionList *ml;
2102         bool found = false;
2103
2104         /* check if the alias is already in the queue */
2105         QTAILQ_FOREACH(ml, alias_print_queue, queue) {
2106             if (ml->mr == mr->alias) {
2107                 found = true;
2108             }
2109         }
2110
2111         if (!found) {
2112             ml = g_new(MemoryRegionList, 1);
2113             ml->mr = mr->alias;
2114             QTAILQ_INSERT_TAIL(alias_print_queue, ml, queue);
2115         }
2116         mon_printf(f, TARGET_FMT_plx "-" TARGET_FMT_plx
2117                    " (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx
2118                    "-" TARGET_FMT_plx "%s\n",
2119                    base + mr->addr,
2120                    base + mr->addr
2121                    + (int128_nz(mr->size) ?
2122                       (hwaddr)int128_get64(int128_sub(mr->size,
2123                                                       int128_one())) : 0),
2124                    mr->priority,
2125                    mr->romd_mode ? 'R' : '-',
2126                    !mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W'
2127                                                                        : '-',
2128                    memory_region_name(mr),
2129                    memory_region_name(mr->alias),
2130                    mr->alias_offset,
2131                    mr->alias_offset
2132                    + (int128_nz(mr->size) ?
2133                       (hwaddr)int128_get64(int128_sub(mr->size,
2134                                                       int128_one())) : 0),
2135                    mr->enabled ? "" : " [disabled]");
2136     } else {
2137         mon_printf(f,
2138                    TARGET_FMT_plx "-" TARGET_FMT_plx " (prio %d, %c%c): %s%s\n",
2139                    base + mr->addr,
2140                    base + mr->addr
2141                    + (int128_nz(mr->size) ?
2142                       (hwaddr)int128_get64(int128_sub(mr->size,
2143                                                       int128_one())) : 0),
2144                    mr->priority,
2145                    mr->romd_mode ? 'R' : '-',
2146                    !mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W'
2147                                                                        : '-',
2148                    memory_region_name(mr),
2149                    mr->enabled ? "" : " [disabled]");
2150     }
2151
2152     QTAILQ_INIT(&submr_print_queue);
2153
2154     QTAILQ_FOREACH(submr, &mr->subregions, subregions_link) {
2155         new_ml = g_new(MemoryRegionList, 1);
2156         new_ml->mr = submr;
2157         QTAILQ_FOREACH(ml, &submr_print_queue, queue) {
2158             if (new_ml->mr->addr < ml->mr->addr ||
2159                 (new_ml->mr->addr == ml->mr->addr &&
2160                  new_ml->mr->priority > ml->mr->priority)) {
2161                 QTAILQ_INSERT_BEFORE(ml, new_ml, queue);
2162                 new_ml = NULL;
2163                 break;
2164             }
2165         }
2166         if (new_ml) {
2167             QTAILQ_INSERT_TAIL(&submr_print_queue, new_ml, queue);
2168         }
2169     }
2170
2171     QTAILQ_FOREACH(ml, &submr_print_queue, queue) {
2172         mtree_print_mr(mon_printf, f, ml->mr, level + 1, base + mr->addr,
2173                        alias_print_queue);
2174     }
2175
2176     QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, queue, next_ml) {
2177         g_free(ml);
2178     }
2179 }
2180
2181 void mtree_info(fprintf_function mon_printf, void *f)
2182 {
2183     MemoryRegionListHead ml_head;
2184     MemoryRegionList *ml, *ml2;
2185     AddressSpace *as;
2186
2187     QTAILQ_INIT(&ml_head);
2188
2189     QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
2190         mon_printf(f, "address-space: %s\n", as->name);
2191         mtree_print_mr(mon_printf, f, as->root, 1, 0, &ml_head);
2192         mon_printf(f, "\n");
2193     }
2194
2195     /* print aliased regions */
2196     QTAILQ_FOREACH(ml, &ml_head, queue) {
2197         mon_printf(f, "memory-region: %s\n", memory_region_name(ml->mr));
2198         mtree_print_mr(mon_printf, f, ml->mr, 1, 0, &ml_head);
2199         mon_printf(f, "\n");
2200     }
2201
2202     QTAILQ_FOREACH_SAFE(ml, &ml_head, queue, ml2) {
2203         g_free(ml);
2204     }
2205 }
2206
2207 static const TypeInfo memory_region_info = {
2208     .parent             = TYPE_OBJECT,
2209     .name               = TYPE_MEMORY_REGION,
2210     .instance_size      = sizeof(MemoryRegion),
2211     .instance_init      = memory_region_initfn,
2212     .instance_finalize  = memory_region_finalize,
2213 };
2214
2215 static void memory_register_types(void)
2216 {
2217     type_register_static(&memory_region_info);
2218 }
2219
2220 type_init(memory_register_types)