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migration: push qemu_savevm_state_cancel out of qemu_savevm_state_*
[qemu.git] / memory.c
blob92a2196b7e01f6146a7f4390d4ec59b054ac2e9e
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 "qemu/bitops.h"
20 #include "sysemu/kvm.h"
21 #include <assert.h>
22
23 #include "exec/memory-internal.h"
24
25 static unsigned memory_region_transaction_depth;
26 static bool memory_region_update_pending;
27 static bool global_dirty_log = false;
28
29 static QTAILQ_HEAD(memory_listeners, MemoryListener) memory_listeners
30 = QTAILQ_HEAD_INITIALIZER(memory_listeners);
31
32 static QTAILQ_HEAD(, AddressSpace) address_spaces
33 = QTAILQ_HEAD_INITIALIZER(address_spaces);
34
35 typedef struct AddrRange AddrRange;
36
37 /*
38 * Note using signed integers limits us to physical addresses at most
39 * 63 bits wide. They are needed for negative offsetting in aliases
40 * (large MemoryRegion::alias_offset).
41 */
42 struct AddrRange {
43 Int128 start;
44 Int128 size;
45 };
46
47 static AddrRange addrrange_make(Int128 start, Int128 size)
48 {
49 return (AddrRange) { start, size };
50 }
51
52 static bool addrrange_equal(AddrRange r1, AddrRange r2)
53 {
54 return int128_eq(r1.start, r2.start) && int128_eq(r1.size, r2.size);
55 }
56
57 static Int128 addrrange_end(AddrRange r)
58 {
59 return int128_add(r.start, r.size);
60 }
61
62 static AddrRange addrrange_shift(AddrRange range, Int128 delta)
63 {
64 int128_addto(&range.start, delta);
65 return range;
66 }
67
68 static bool addrrange_contains(AddrRange range, Int128 addr)
69 {
70 return int128_ge(addr, range.start)
71 && int128_lt(addr, addrrange_end(range));
72 }
73
74 static bool addrrange_intersects(AddrRange r1, AddrRange r2)
75 {
76 return addrrange_contains(r1, r2.start)
77 || addrrange_contains(r2, r1.start);
78 }
79
80 static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2)
81 {
82 Int128 start = int128_max(r1.start, r2.start);
83 Int128 end = int128_min(addrrange_end(r1), addrrange_end(r2));
84 return addrrange_make(start, int128_sub(end, start));
85 }
86
87 enum ListenerDirection { Forward, Reverse };
88
89 static bool memory_listener_match(MemoryListener *listener,
90 MemoryRegionSection *section)
91 {
92 return !listener->address_space_filter
93 || listener->address_space_filter == section->address_space;
94 }
95
96 #define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
97 do { \
98 MemoryListener *_listener; \
99 \
100 switch (_direction) { \
101 case Forward: \
102 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
103 if (_listener->_callback) { \
104 _listener->_callback(_listener, ##_args); \
105 } \
106 } \
107 break; \
108 case Reverse: \
109 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
110 memory_listeners, link) { \
111 if (_listener->_callback) { \
112 _listener->_callback(_listener, ##_args); \
113 } \
114 } \
115 break; \
116 default: \
117 abort(); \
118 } \
119 } while (0)
120
121 #define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \
122 do { \
123 MemoryListener *_listener; \
124 \
125 switch (_direction) { \
126 case Forward: \
127 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
128 if (_listener->_callback \
129 && memory_listener_match(_listener, _section)) { \
130 _listener->_callback(_listener, _section, ##_args); \
131 } \
132 } \
133 break; \
134 case Reverse: \
135 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
136 memory_listeners, link) { \
137 if (_listener->_callback \
138 && memory_listener_match(_listener, _section)) { \
139 _listener->_callback(_listener, _section, ##_args); \
140 } \
141 } \
142 break; \
143 default: \
144 abort(); \
145 } \
146 } while (0)
147
148 #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \
149 MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \
150 .mr = (fr)->mr, \
151 .address_space = (as), \
152 .offset_within_region = (fr)->offset_in_region, \
153 .size = int128_get64((fr)->addr.size), \
154 .offset_within_address_space = int128_get64((fr)->addr.start), \
155 .readonly = (fr)->readonly, \
156 }))
157
158 struct CoalescedMemoryRange {
159 AddrRange addr;
160 QTAILQ_ENTRY(CoalescedMemoryRange) link;
161 };
162
163 struct MemoryRegionIoeventfd {
164 AddrRange addr;
165 bool match_data;
166 uint64_t data;
167 EventNotifier *e;
168 };
169
170 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a,
171 MemoryRegionIoeventfd b)
172 {
173 if (int128_lt(a.addr.start, b.addr.start)) {
174 return true;
175 } else if (int128_gt(a.addr.start, b.addr.start)) {
176 return false;
177 } else if (int128_lt(a.addr.size, b.addr.size)) {
178 return true;
179 } else if (int128_gt(a.addr.size, b.addr.size)) {
180 return false;
181 } else if (a.match_data < b.match_data) {
182 return true;
183 } else if (a.match_data > b.match_data) {
184 return false;
185 } else if (a.match_data) {
186 if (a.data < b.data) {
187 return true;
188 } else if (a.data > b.data) {
189 return false;
190 }
191 }
192 if (a.e < b.e) {
193 return true;
194 } else if (a.e > b.e) {
195 return false;
196 }
197 return false;
198 }
199
200 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a,
201 MemoryRegionIoeventfd b)
202 {
203 return !memory_region_ioeventfd_before(a, b)
204 && !memory_region_ioeventfd_before(b, a);
205 }
206
207 typedef struct FlatRange FlatRange;
208 typedef struct FlatView FlatView;
209
210 /* Range of memory in the global map. Addresses are absolute. */
211 struct FlatRange {
212 MemoryRegion *mr;
213 hwaddr offset_in_region;
214 AddrRange addr;
215 uint8_t dirty_log_mask;
216 bool readable;
217 bool readonly;
218 };
219
220 /* Flattened global view of current active memory hierarchy. Kept in sorted
221 * order.
222 */
223 struct FlatView {
224 FlatRange *ranges;
225 unsigned nr;
226 unsigned nr_allocated;
227 };
228
229 typedef struct AddressSpaceOps AddressSpaceOps;
230
231 #define FOR_EACH_FLAT_RANGE(var, view) \
232 for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
233
234 static bool flatrange_equal(FlatRange *a, FlatRange *b)
235 {
236 return a->mr == b->mr
237 && addrrange_equal(a->addr, b->addr)
238 && a->offset_in_region == b->offset_in_region
239 && a->readable == b->readable
240 && a->readonly == b->readonly;
241 }
242
243 static void flatview_init(FlatView *view)
244 {
245 view->ranges = NULL;
246 view->nr = 0;
247 view->nr_allocated = 0;
248 }
249
250 /* Insert a range into a given position. Caller is responsible for maintaining
251 * sorting order.
252 */
253 static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range)
254 {
255 if (view->nr == view->nr_allocated) {
256 view->nr_allocated = MAX(2 * view->nr, 10);
257 view->ranges = g_realloc(view->ranges,
258 view->nr_allocated * sizeof(*view->ranges));
259 }
260 memmove(view->ranges + pos + 1, view->ranges + pos,
261 (view->nr - pos) * sizeof(FlatRange));
262 view->ranges[pos] = *range;
263 ++view->nr;
264 }
265
266 static void flatview_destroy(FlatView *view)
267 {
268 g_free(view->ranges);
269 }
270
271 static bool can_merge(FlatRange *r1, FlatRange *r2)
272 {
273 return int128_eq(addrrange_end(r1->addr), r2->addr.start)
274 && r1->mr == r2->mr
275 && int128_eq(int128_add(int128_make64(r1->offset_in_region),
276 r1->addr.size),
277 int128_make64(r2->offset_in_region))
278 && r1->dirty_log_mask == r2->dirty_log_mask
279 && r1->readable == r2->readable
280 && r1->readonly == r2->readonly;
281 }
282
283 /* Attempt to simplify a view by merging ajacent ranges */
284 static void flatview_simplify(FlatView *view)
285 {
286 unsigned i, j;
287
288 i = 0;
289 while (i < view->nr) {
290 j = i + 1;
291 while (j < view->nr
292 && can_merge(&view->ranges[j-1], &view->ranges[j])) {
293 int128_addto(&view->ranges[i].addr.size, view->ranges[j].addr.size);
294 ++j;
295 }
296 ++i;
297 memmove(&view->ranges[i], &view->ranges[j],
298 (view->nr - j) * sizeof(view->ranges[j]));
299 view->nr -= j - i;
300 }
301 }
302
303 static void memory_region_read_accessor(void *opaque,
304 hwaddr addr,
305 uint64_t *value,
306 unsigned size,
307 unsigned shift,
308 uint64_t mask)
309 {
310 MemoryRegion *mr = opaque;
311 uint64_t tmp;
312
313 if (mr->flush_coalesced_mmio) {
314 qemu_flush_coalesced_mmio_buffer();
315 }
316 tmp = mr->ops->read(mr->opaque, addr, size);
317 *value |= (tmp & mask) << shift;
318 }
319
320 static void memory_region_write_accessor(void *opaque,
321 hwaddr addr,
322 uint64_t *value,
323 unsigned size,
324 unsigned shift,
325 uint64_t mask)
326 {
327 MemoryRegion *mr = opaque;
328 uint64_t tmp;
329
330 if (mr->flush_coalesced_mmio) {
331 qemu_flush_coalesced_mmio_buffer();
332 }
333 tmp = (*value >> shift) & mask;
334 mr->ops->write(mr->opaque, addr, tmp, size);
335 }
336
337 static void access_with_adjusted_size(hwaddr addr,
338 uint64_t *value,
339 unsigned size,
340 unsigned access_size_min,
341 unsigned access_size_max,
342 void (*access)(void *opaque,
343 hwaddr addr,
344 uint64_t *value,
345 unsigned size,
346 unsigned shift,
347 uint64_t mask),
348 void *opaque)
349 {
350 uint64_t access_mask;
351 unsigned access_size;
352 unsigned i;
353
354 if (!access_size_min) {
355 access_size_min = 1;
356 }
357 if (!access_size_max) {
358 access_size_max = 4;
359 }
360 access_size = MAX(MIN(size, access_size_max), access_size_min);
361 access_mask = -1ULL >> (64 - access_size * 8);
362 for (i = 0; i < size; i += access_size) {
363 /* FIXME: big-endian support */
364 access(opaque, addr + i, value, access_size, i * 8, access_mask);
365 }
366 }
367
368 static const MemoryRegionPortio *find_portio(MemoryRegion *mr, uint64_t offset,
369 unsigned width, bool write)
370 {
371 const MemoryRegionPortio *mrp;
372
373 for (mrp = mr->ops->old_portio; mrp->size; ++mrp) {
374 if (offset >= mrp->offset && offset < mrp->offset + mrp->len
375 && width == mrp->size
376 && (write ? (bool)mrp->write : (bool)mrp->read)) {
377 return mrp;
378 }
379 }
380 return NULL;
381 }
382
383 static void memory_region_iorange_read(IORange *iorange,
384 uint64_t offset,
385 unsigned width,
386 uint64_t *data)
387 {
388 MemoryRegionIORange *mrio
389 = container_of(iorange, MemoryRegionIORange, iorange);
390 MemoryRegion *mr = mrio->mr;
391
392 offset += mrio->offset;
393 if (mr->ops->old_portio) {
394 const MemoryRegionPortio *mrp = find_portio(mr, offset - mrio->offset,
395 width, false);
396
397 *data = ((uint64_t)1 << (width * 8)) - 1;
398 if (mrp) {
399 *data = mrp->read(mr->opaque, offset);
400 } else if (width == 2) {
401 mrp = find_portio(mr, offset - mrio->offset, 1, false);
402 assert(mrp);
403 *data = mrp->read(mr->opaque, offset) |
404 (mrp->read(mr->opaque, offset + 1) << 8);
405 }
406 return;
407 }
408 *data = 0;
409 access_with_adjusted_size(offset, data, width,
410 mr->ops->impl.min_access_size,
411 mr->ops->impl.max_access_size,
412 memory_region_read_accessor, mr);
413 }
414
415 static void memory_region_iorange_write(IORange *iorange,
416 uint64_t offset,
417 unsigned width,
418 uint64_t data)
419 {
420 MemoryRegionIORange *mrio
421 = container_of(iorange, MemoryRegionIORange, iorange);
422 MemoryRegion *mr = mrio->mr;
423
424 offset += mrio->offset;
425 if (mr->ops->old_portio) {
426 const MemoryRegionPortio *mrp = find_portio(mr, offset - mrio->offset,
427 width, true);
428
429 if (mrp) {
430 mrp->write(mr->opaque, offset, data);
431 } else if (width == 2) {
432 mrp = find_portio(mr, offset - mrio->offset, 1, true);
433 assert(mrp);
434 mrp->write(mr->opaque, offset, data & 0xff);
435 mrp->write(mr->opaque, offset + 1, data >> 8);
436 }
437 return;
438 }
439 access_with_adjusted_size(offset, &data, width,
440 mr->ops->impl.min_access_size,
441 mr->ops->impl.max_access_size,
442 memory_region_write_accessor, mr);
443 }
444
445 static void memory_region_iorange_destructor(IORange *iorange)
446 {
447 g_free(container_of(iorange, MemoryRegionIORange, iorange));
448 }
449
450 const IORangeOps memory_region_iorange_ops = {
451 .read = memory_region_iorange_read,
452 .write = memory_region_iorange_write,
453 .destructor = memory_region_iorange_destructor,
454 };
455
456 static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
457 {
458 AddressSpace *as;
459
460 while (mr->parent) {
461 mr = mr->parent;
462 }
463 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
464 if (mr == as->root) {
465 return as;
466 }
467 }
468 abort();
469 }
470
471 /* Render a memory region into the global view. Ranges in @view obscure
472 * ranges in @mr.
473 */
474 static void render_memory_region(FlatView *view,
475 MemoryRegion *mr,
476 Int128 base,
477 AddrRange clip,
478 bool readonly)
479 {
480 MemoryRegion *subregion;
481 unsigned i;
482 hwaddr offset_in_region;
483 Int128 remain;
484 Int128 now;
485 FlatRange fr;
486 AddrRange tmp;
487
488 if (!mr->enabled) {
489 return;
490 }
491
492 int128_addto(&base, int128_make64(mr->addr));
493 readonly |= mr->readonly;
494
495 tmp = addrrange_make(base, mr->size);
496
497 if (!addrrange_intersects(tmp, clip)) {
498 return;
499 }
500
501 clip = addrrange_intersection(tmp, clip);
502
503 if (mr->alias) {
504 int128_subfrom(&base, int128_make64(mr->alias->addr));
505 int128_subfrom(&base, int128_make64(mr->alias_offset));
506 render_memory_region(view, mr->alias, base, clip, readonly);
507 return;
508 }
509
510 /* Render subregions in priority order. */
511 QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
512 render_memory_region(view, subregion, base, clip, readonly);
513 }
514
515 if (!mr->terminates) {
516 return;
517 }
518
519 offset_in_region = int128_get64(int128_sub(clip.start, base));
520 base = clip.start;
521 remain = clip.size;
522
523 /* Render the region itself into any gaps left by the current view. */
524 for (i = 0; i < view->nr && int128_nz(remain); ++i) {
525 if (int128_ge(base, addrrange_end(view->ranges[i].addr))) {
526 continue;
527 }
528 if (int128_lt(base, view->ranges[i].addr.start)) {
529 now = int128_min(remain,
530 int128_sub(view->ranges[i].addr.start, base));
531 fr.mr = mr;
532 fr.offset_in_region = offset_in_region;
533 fr.addr = addrrange_make(base, now);
534 fr.dirty_log_mask = mr->dirty_log_mask;
535 fr.readable = mr->readable;
536 fr.readonly = readonly;
537 flatview_insert(view, i, &fr);
538 ++i;
539 int128_addto(&base, now);
540 offset_in_region += int128_get64(now);
541 int128_subfrom(&remain, now);
542 }
543 now = int128_sub(int128_min(int128_add(base, remain),
544 addrrange_end(view->ranges[i].addr)),
545 base);
546 int128_addto(&base, now);
547 offset_in_region += int128_get64(now);
548 int128_subfrom(&remain, now);
549 }
550 if (int128_nz(remain)) {
551 fr.mr = mr;
552 fr.offset_in_region = offset_in_region;
553 fr.addr = addrrange_make(base, remain);
554 fr.dirty_log_mask = mr->dirty_log_mask;
555 fr.readable = mr->readable;
556 fr.readonly = readonly;
557 flatview_insert(view, i, &fr);
558 }
559 }
560
561 /* Render a memory topology into a list of disjoint absolute ranges. */
562 static FlatView generate_memory_topology(MemoryRegion *mr)
563 {
564 FlatView view;
565
566 flatview_init(&view);
567
568 if (mr) {
569 render_memory_region(&view, mr, int128_zero(),
570 addrrange_make(int128_zero(), int128_2_64()), false);
571 }
572 flatview_simplify(&view);
573
574 return view;
575 }
576
577 static void address_space_add_del_ioeventfds(AddressSpace *as,
578 MemoryRegionIoeventfd *fds_new,
579 unsigned fds_new_nb,
580 MemoryRegionIoeventfd *fds_old,
581 unsigned fds_old_nb)
582 {
583 unsigned iold, inew;
584 MemoryRegionIoeventfd *fd;
585 MemoryRegionSection section;
586
587 /* Generate a symmetric difference of the old and new fd sets, adding
588 * and deleting as necessary.
589 */
590
591 iold = inew = 0;
592 while (iold < fds_old_nb || inew < fds_new_nb) {
593 if (iold < fds_old_nb
594 && (inew == fds_new_nb
595 || memory_region_ioeventfd_before(fds_old[iold],
596 fds_new[inew]))) {
597 fd = &fds_old[iold];
598 section = (MemoryRegionSection) {
599 .address_space = as,
600 .offset_within_address_space = int128_get64(fd->addr.start),
601 .size = int128_get64(fd->addr.size),
602 };
603 MEMORY_LISTENER_CALL(eventfd_del, Forward, &section,
604 fd->match_data, fd->data, fd->e);
605 ++iold;
606 } else if (inew < fds_new_nb
607 && (iold == fds_old_nb
608 || memory_region_ioeventfd_before(fds_new[inew],
609 fds_old[iold]))) {
610 fd = &fds_new[inew];
611 section = (MemoryRegionSection) {
612 .address_space = as,
613 .offset_within_address_space = int128_get64(fd->addr.start),
614 .size = int128_get64(fd->addr.size),
615 };
616 MEMORY_LISTENER_CALL(eventfd_add, Reverse, &section,
617 fd->match_data, fd->data, fd->e);
618 ++inew;
619 } else {
620 ++iold;
621 ++inew;
622 }
623 }
624 }
625
626 static void address_space_update_ioeventfds(AddressSpace *as)
627 {
628 FlatRange *fr;
629 unsigned ioeventfd_nb = 0;
630 MemoryRegionIoeventfd *ioeventfds = NULL;
631 AddrRange tmp;
632 unsigned i;
633
634 FOR_EACH_FLAT_RANGE(fr, as->current_map) {
635 for (i = 0; i < fr->mr->ioeventfd_nb; ++i) {
636 tmp = addrrange_shift(fr->mr->ioeventfds[i].addr,
637 int128_sub(fr->addr.start,
638 int128_make64(fr->offset_in_region)));
639 if (addrrange_intersects(fr->addr, tmp)) {
640 ++ioeventfd_nb;
641 ioeventfds = g_realloc(ioeventfds,
642 ioeventfd_nb * sizeof(*ioeventfds));
643 ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i];
644 ioeventfds[ioeventfd_nb-1].addr = tmp;
645 }
646 }
647 }
648
649 address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb,
650 as->ioeventfds, as->ioeventfd_nb);
651
652 g_free(as->ioeventfds);
653 as->ioeventfds = ioeventfds;
654 as->ioeventfd_nb = ioeventfd_nb;
655 }
656
657 static void address_space_update_topology_pass(AddressSpace *as,
658 FlatView old_view,
659 FlatView new_view,
660 bool adding)
661 {
662 unsigned iold, inew;
663 FlatRange *frold, *frnew;
664
665 /* Generate a symmetric difference of the old and new memory maps.
666 * Kill ranges in the old map, and instantiate ranges in the new map.
667 */
668 iold = inew = 0;
669 while (iold < old_view.nr || inew < new_view.nr) {
670 if (iold < old_view.nr) {
671 frold = &old_view.ranges[iold];
672 } else {
673 frold = NULL;
674 }
675 if (inew < new_view.nr) {
676 frnew = &new_view.ranges[inew];
677 } else {
678 frnew = NULL;
679 }
680
681 if (frold
682 && (!frnew
683 || int128_lt(frold->addr.start, frnew->addr.start)
684 || (int128_eq(frold->addr.start, frnew->addr.start)
685 && !flatrange_equal(frold, frnew)))) {
686 /* In old, but (not in new, or in new but attributes changed). */
687
688 if (!adding) {
689 MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del);
690 }
691
692 ++iold;
693 } else if (frold && frnew && flatrange_equal(frold, frnew)) {
694 /* In both (logging may have changed) */
695
696 if (adding) {
697 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop);
698 if (frold->dirty_log_mask && !frnew->dirty_log_mask) {
699 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop);
700 } else if (frnew->dirty_log_mask && !frold->dirty_log_mask) {
701 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start);
702 }
703 }
704
705 ++iold;
706 ++inew;
707 } else {
708 /* In new */
709
710 if (adding) {
711 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add);
712 }
713
714 ++inew;
715 }
716 }
717 }
718
719
720 static void address_space_update_topology(AddressSpace *as)
721 {
722 FlatView old_view = *as->current_map;
723 FlatView new_view = generate_memory_topology(as->root);
724
725 address_space_update_topology_pass(as, old_view, new_view, false);
726 address_space_update_topology_pass(as, old_view, new_view, true);
727
728 *as->current_map = new_view;
729 flatview_destroy(&old_view);
730 address_space_update_ioeventfds(as);
731 }
732
733 void memory_region_transaction_begin(void)
734 {
735 qemu_flush_coalesced_mmio_buffer();
736 ++memory_region_transaction_depth;
737 }
738
739 void memory_region_transaction_commit(void)
740 {
741 AddressSpace *as;
742
743 assert(memory_region_transaction_depth);
744 --memory_region_transaction_depth;
745 if (!memory_region_transaction_depth && memory_region_update_pending) {
746 memory_region_update_pending = false;
747 MEMORY_LISTENER_CALL_GLOBAL(begin, Forward);
748
749 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
750 address_space_update_topology(as);
751 }
752
753 MEMORY_LISTENER_CALL_GLOBAL(commit, Forward);
754 }
755 }
756
757 static void memory_region_destructor_none(MemoryRegion *mr)
758 {
759 }
760
761 static void memory_region_destructor_ram(MemoryRegion *mr)
762 {
763 qemu_ram_free(mr->ram_addr);
764 }
765
766 static void memory_region_destructor_ram_from_ptr(MemoryRegion *mr)
767 {
768 qemu_ram_free_from_ptr(mr->ram_addr);
769 }
770
771 static void memory_region_destructor_iomem(MemoryRegion *mr)
772 {
773 }
774
775 static void memory_region_destructor_rom_device(MemoryRegion *mr)
776 {
777 qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK);
778 }
779
780 static bool memory_region_wrong_endianness(MemoryRegion *mr)
781 {
782 #ifdef TARGET_WORDS_BIGENDIAN
783 return mr->ops->endianness == DEVICE_LITTLE_ENDIAN;
784 #else
785 return mr->ops->endianness == DEVICE_BIG_ENDIAN;
786 #endif
787 }
788
789 void memory_region_init(MemoryRegion *mr,
790 const char *name,
791 uint64_t size)
792 {
793 mr->ops = NULL;
794 mr->parent = NULL;
795 mr->size = int128_make64(size);
796 if (size == UINT64_MAX) {
797 mr->size = int128_2_64();
798 }
799 mr->addr = 0;
800 mr->subpage = false;
801 mr->enabled = true;
802 mr->terminates = false;
803 mr->ram = false;
804 mr->readable = true;
805 mr->readonly = false;
806 mr->rom_device = false;
807 mr->destructor = memory_region_destructor_none;
808 mr->priority = 0;
809 mr->may_overlap = false;
810 mr->alias = NULL;
811 QTAILQ_INIT(&mr->subregions);
812 memset(&mr->subregions_link, 0, sizeof mr->subregions_link);
813 QTAILQ_INIT(&mr->coalesced);
814 mr->name = g_strdup(name);
815 mr->dirty_log_mask = 0;
816 mr->ioeventfd_nb = 0;
817 mr->ioeventfds = NULL;
818 mr->flush_coalesced_mmio = false;
819 }
820
821 static bool memory_region_access_valid(MemoryRegion *mr,
822 hwaddr addr,
823 unsigned size,
824 bool is_write)
825 {
826 if (mr->ops->valid.accepts
827 && !mr->ops->valid.accepts(mr->opaque, addr, size, is_write)) {
828 return false;
829 }
830
831 if (!mr->ops->valid.unaligned && (addr & (size - 1))) {
832 return false;
833 }
834
835 /* Treat zero as compatibility all valid */
836 if (!mr->ops->valid.max_access_size) {
837 return true;
838 }
839
840 if (size > mr->ops->valid.max_access_size
841 || size < mr->ops->valid.min_access_size) {
842 return false;
843 }
844 return true;
845 }
846
847 static uint64_t memory_region_dispatch_read1(MemoryRegion *mr,
848 hwaddr addr,
849 unsigned size)
850 {
851 uint64_t data = 0;
852
853 if (!memory_region_access_valid(mr, addr, size, false)) {
854 return -1U; /* FIXME: better signalling */
855 }
856
857 if (!mr->ops->read) {
858 return mr->ops->old_mmio.read[ctz32(size)](mr->opaque, addr);
859 }
860
861 /* FIXME: support unaligned access */
862 access_with_adjusted_size(addr, &data, size,
863 mr->ops->impl.min_access_size,
864 mr->ops->impl.max_access_size,
865 memory_region_read_accessor, mr);
866
867 return data;
868 }
869
870 static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size)
871 {
872 if (memory_region_wrong_endianness(mr)) {
873 switch (size) {
874 case 1:
875 break;
876 case 2:
877 *data = bswap16(*data);
878 break;
879 case 4:
880 *data = bswap32(*data);
881 break;
882 default:
883 abort();
884 }
885 }
886 }
887
888 static uint64_t memory_region_dispatch_read(MemoryRegion *mr,
889 hwaddr addr,
890 unsigned size)
891 {
892 uint64_t ret;
893
894 ret = memory_region_dispatch_read1(mr, addr, size);
895 adjust_endianness(mr, &ret, size);
896 return ret;
897 }
898
899 static void memory_region_dispatch_write(MemoryRegion *mr,
900 hwaddr addr,
901 uint64_t data,
902 unsigned size)
903 {
904 if (!memory_region_access_valid(mr, addr, size, true)) {
905 return; /* FIXME: better signalling */
906 }
907
908 adjust_endianness(mr, &data, size);
909
910 if (!mr->ops->write) {
911 mr->ops->old_mmio.write[ctz32(size)](mr->opaque, addr, data);
912 return;
913 }
914
915 /* FIXME: support unaligned access */
916 access_with_adjusted_size(addr, &data, size,
917 mr->ops->impl.min_access_size,
918 mr->ops->impl.max_access_size,
919 memory_region_write_accessor, mr);
920 }
921
922 void memory_region_init_io(MemoryRegion *mr,
923 const MemoryRegionOps *ops,
924 void *opaque,
925 const char *name,
926 uint64_t size)
927 {
928 memory_region_init(mr, name, size);
929 mr->ops = ops;
930 mr->opaque = opaque;
931 mr->terminates = true;
932 mr->destructor = memory_region_destructor_iomem;
933 mr->ram_addr = ~(ram_addr_t)0;
934 }
935
936 void memory_region_init_ram(MemoryRegion *mr,
937 const char *name,
938 uint64_t size)
939 {
940 memory_region_init(mr, name, size);
941 mr->ram = true;
942 mr->terminates = true;
943 mr->destructor = memory_region_destructor_ram;
944 mr->ram_addr = qemu_ram_alloc(size, mr);
945 }
946
947 void memory_region_init_ram_ptr(MemoryRegion *mr,
948 const char *name,
949 uint64_t size,
950 void *ptr)
951 {
952 memory_region_init(mr, name, size);
953 mr->ram = true;
954 mr->terminates = true;
955 mr->destructor = memory_region_destructor_ram_from_ptr;
956 mr->ram_addr = qemu_ram_alloc_from_ptr(size, ptr, mr);
957 }
958
959 void memory_region_init_alias(MemoryRegion *mr,
960 const char *name,
961 MemoryRegion *orig,
962 hwaddr offset,
963 uint64_t size)
964 {
965 memory_region_init(mr, name, size);
966 mr->alias = orig;
967 mr->alias_offset = offset;
968 }
969
970 void memory_region_init_rom_device(MemoryRegion *mr,
971 const MemoryRegionOps *ops,
972 void *opaque,
973 const char *name,
974 uint64_t size)
975 {
976 memory_region_init(mr, name, size);
977 mr->ops = ops;
978 mr->opaque = opaque;
979 mr->terminates = true;
980 mr->rom_device = true;
981 mr->destructor = memory_region_destructor_rom_device;
982 mr->ram_addr = qemu_ram_alloc(size, mr);
983 }
984
985 static uint64_t invalid_read(void *opaque, hwaddr addr,
986 unsigned size)
987 {
988 MemoryRegion *mr = opaque;
989
990 if (!mr->warning_printed) {
991 fprintf(stderr, "Invalid read from memory region %s\n", mr->name);
992 mr->warning_printed = true;
993 }
994 return -1U;
995 }
996
997 static void invalid_write(void *opaque, hwaddr addr, uint64_t data,
998 unsigned size)
999 {
1000 MemoryRegion *mr = opaque;
1001
1002 if (!mr->warning_printed) {
1003 fprintf(stderr, "Invalid write to memory region %s\n", mr->name);
1004 mr->warning_printed = true;
1005 }
1006 }
1007
1008 static const MemoryRegionOps reservation_ops = {
1009 .read = invalid_read,
1010 .write = invalid_write,
1011 .endianness = DEVICE_NATIVE_ENDIAN,
1012 };
1013
1014 void memory_region_init_reservation(MemoryRegion *mr,
1015 const char *name,
1016 uint64_t size)
1017 {
1018 memory_region_init_io(mr, &reservation_ops, mr, name, size);
1019 }
1020
1021 void memory_region_destroy(MemoryRegion *mr)
1022 {
1023 assert(QTAILQ_EMPTY(&mr->subregions));
1024 assert(memory_region_transaction_depth == 0);
1025 mr->destructor(mr);
1026 memory_region_clear_coalescing(mr);
1027 g_free((char *)mr->name);
1028 g_free(mr->ioeventfds);
1029 }
1030
1031 uint64_t memory_region_size(MemoryRegion *mr)
1032 {
1033 if (int128_eq(mr->size, int128_2_64())) {
1034 return UINT64_MAX;
1035 }
1036 return int128_get64(mr->size);
1037 }
1038
1039 const char *memory_region_name(MemoryRegion *mr)
1040 {
1041 return mr->name;
1042 }
1043
1044 bool memory_region_is_ram(MemoryRegion *mr)
1045 {
1046 return mr->ram;
1047 }
1048
1049 bool memory_region_is_logging(MemoryRegion *mr)
1050 {
1051 return mr->dirty_log_mask;
1052 }
1053
1054 bool memory_region_is_rom(MemoryRegion *mr)
1055 {
1056 return mr->ram && mr->readonly;
1057 }
1058
1059 void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
1060 {
1061 uint8_t mask = 1 << client;
1062
1063 memory_region_transaction_begin();
1064 mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask);
1065 memory_region_update_pending |= mr->enabled;
1066 memory_region_transaction_commit();
1067 }
1068
1069 bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr,
1070 hwaddr size, unsigned client)
1071 {
1072 assert(mr->terminates);
1073 return cpu_physical_memory_get_dirty(mr->ram_addr + addr, size,
1074 1 << client);
1075 }
1076
1077 void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
1078 hwaddr size)
1079 {
1080 assert(mr->terminates);
1081 return cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size, -1);
1082 }
1083
1084 bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,
1085 hwaddr size, unsigned client)
1086 {
1087 bool ret;
1088 assert(mr->terminates);
1089 ret = cpu_physical_memory_get_dirty(mr->ram_addr + addr, size,
1090 1 << client);
1091 if (ret) {
1092 cpu_physical_memory_reset_dirty(mr->ram_addr + addr,
1093 mr->ram_addr + addr + size,
1094 1 << client);
1095 }
1096 return ret;
1097 }
1098
1099
1100 void memory_region_sync_dirty_bitmap(MemoryRegion *mr)
1101 {
1102 AddressSpace *as;
1103 FlatRange *fr;
1104
1105 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1106 FOR_EACH_FLAT_RANGE(fr, as->current_map) {
1107 if (fr->mr == mr) {
1108 MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
1109 }
1110 }
1111 }
1112 }
1113
1114 void memory_region_set_readonly(MemoryRegion *mr, bool readonly)
1115 {
1116 if (mr->readonly != readonly) {
1117 memory_region_transaction_begin();
1118 mr->readonly = readonly;
1119 memory_region_update_pending |= mr->enabled;
1120 memory_region_transaction_commit();
1121 }
1122 }
1123
1124 void memory_region_rom_device_set_readable(MemoryRegion *mr, bool readable)
1125 {
1126 if (mr->readable != readable) {
1127 memory_region_transaction_begin();
1128 mr->readable = readable;
1129 memory_region_update_pending |= mr->enabled;
1130 memory_region_transaction_commit();
1131 }
1132 }
1133
1134 void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
1135 hwaddr size, unsigned client)
1136 {
1137 assert(mr->terminates);
1138 cpu_physical_memory_reset_dirty(mr->ram_addr + addr,
1139 mr->ram_addr + addr + size,
1140 1 << client);
1141 }
1142
1143 void *memory_region_get_ram_ptr(MemoryRegion *mr)
1144 {
1145 if (mr->alias) {
1146 return memory_region_get_ram_ptr(mr->alias) + mr->alias_offset;
1147 }
1148
1149 assert(mr->terminates);
1150
1151 return qemu_get_ram_ptr(mr->ram_addr & TARGET_PAGE_MASK);
1152 }
1153
1154 static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpace *as)
1155 {
1156 FlatRange *fr;
1157 CoalescedMemoryRange *cmr;
1158 AddrRange tmp;
1159 MemoryRegionSection section;
1160
1161 FOR_EACH_FLAT_RANGE(fr, as->current_map) {
1162 if (fr->mr == mr) {
1163 section = (MemoryRegionSection) {
1164 .address_space = as,
1165 .offset_within_address_space = int128_get64(fr->addr.start),
1166 .size = int128_get64(fr->addr.size),
1167 };
1168
1169 MEMORY_LISTENER_CALL(coalesced_mmio_del, Reverse, &section,
1170 int128_get64(fr->addr.start),
1171 int128_get64(fr->addr.size));
1172 QTAILQ_FOREACH(cmr, &mr->coalesced, link) {
1173 tmp = addrrange_shift(cmr->addr,
1174 int128_sub(fr->addr.start,
1175 int128_make64(fr->offset_in_region)));
1176 if (!addrrange_intersects(tmp, fr->addr)) {
1177 continue;
1178 }
1179 tmp = addrrange_intersection(tmp, fr->addr);
1180 MEMORY_LISTENER_CALL(coalesced_mmio_add, Forward, &section,
1181 int128_get64(tmp.start),
1182 int128_get64(tmp.size));
1183 }
1184 }
1185 }
1186 }
1187
1188 static void memory_region_update_coalesced_range(MemoryRegion *mr)
1189 {
1190 AddressSpace *as;
1191
1192 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1193 memory_region_update_coalesced_range_as(mr, as);
1194 }
1195 }
1196
1197 void memory_region_set_coalescing(MemoryRegion *mr)
1198 {
1199 memory_region_clear_coalescing(mr);
1200 memory_region_add_coalescing(mr, 0, int128_get64(mr->size));
1201 }
1202
1203 void memory_region_add_coalescing(MemoryRegion *mr,
1204 hwaddr offset,
1205 uint64_t size)
1206 {
1207 CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr));
1208
1209 cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size));
1210 QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link);
1211 memory_region_update_coalesced_range(mr);
1212 memory_region_set_flush_coalesced(mr);
1213 }
1214
1215 void memory_region_clear_coalescing(MemoryRegion *mr)
1216 {
1217 CoalescedMemoryRange *cmr;
1218
1219 qemu_flush_coalesced_mmio_buffer();
1220 mr->flush_coalesced_mmio = false;
1221
1222 while (!QTAILQ_EMPTY(&mr->coalesced)) {
1223 cmr = QTAILQ_FIRST(&mr->coalesced);
1224 QTAILQ_REMOVE(&mr->coalesced, cmr, link);
1225 g_free(cmr);
1226 }
1227 memory_region_update_coalesced_range(mr);
1228 }
1229
1230 void memory_region_set_flush_coalesced(MemoryRegion *mr)
1231 {
1232 mr->flush_coalesced_mmio = true;
1233 }
1234
1235 void memory_region_clear_flush_coalesced(MemoryRegion *mr)
1236 {
1237 qemu_flush_coalesced_mmio_buffer();
1238 if (QTAILQ_EMPTY(&mr->coalesced)) {
1239 mr->flush_coalesced_mmio = false;
1240 }
1241 }
1242
1243 void memory_region_add_eventfd(MemoryRegion *mr,
1244 hwaddr addr,
1245 unsigned size,
1246 bool match_data,
1247 uint64_t data,
1248 EventNotifier *e)
1249 {
1250 MemoryRegionIoeventfd mrfd = {
1251 .addr.start = int128_make64(addr),
1252 .addr.size = int128_make64(size),
1253 .match_data = match_data,
1254 .data = data,
1255 .e = e,
1256 };
1257 unsigned i;
1258
1259 adjust_endianness(mr, &mrfd.data, size);
1260 memory_region_transaction_begin();
1261 for (i = 0; i < mr->ioeventfd_nb; ++i) {
1262 if (memory_region_ioeventfd_before(mrfd, mr->ioeventfds[i])) {
1263 break;
1264 }
1265 }
1266 ++mr->ioeventfd_nb;
1267 mr->ioeventfds = g_realloc(mr->ioeventfds,
1268 sizeof(*mr->ioeventfds) * mr->ioeventfd_nb);
1269 memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i],
1270 sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i));
1271 mr->ioeventfds[i] = mrfd;
1272 memory_region_update_pending |= mr->enabled;
1273 memory_region_transaction_commit();
1274 }
1275
1276 void memory_region_del_eventfd(MemoryRegion *mr,
1277 hwaddr addr,
1278 unsigned size,
1279 bool match_data,
1280 uint64_t data,
1281 EventNotifier *e)
1282 {
1283 MemoryRegionIoeventfd mrfd = {
1284 .addr.start = int128_make64(addr),
1285 .addr.size = int128_make64(size),
1286 .match_data = match_data,
1287 .data = data,
1288 .e = e,
1289 };
1290 unsigned i;
1291
1292 adjust_endianness(mr, &mrfd.data, size);
1293 memory_region_transaction_begin();
1294 for (i = 0; i < mr->ioeventfd_nb; ++i) {
1295 if (memory_region_ioeventfd_equal(mrfd, mr->ioeventfds[i])) {
1296 break;
1297 }
1298 }
1299 assert(i != mr->ioeventfd_nb);
1300 memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1],
1301 sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1)));
1302 --mr->ioeventfd_nb;
1303 mr->ioeventfds = g_realloc(mr->ioeventfds,
1304 sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1);
1305 memory_region_update_pending |= mr->enabled;
1306 memory_region_transaction_commit();
1307 }
1308
1309 static void memory_region_add_subregion_common(MemoryRegion *mr,
1310 hwaddr offset,
1311 MemoryRegion *subregion)
1312 {
1313 MemoryRegion *other;
1314
1315 memory_region_transaction_begin();
1316
1317 assert(!subregion->parent);
1318 subregion->parent = mr;
1319 subregion->addr = offset;
1320 QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
1321 if (subregion->may_overlap || other->may_overlap) {
1322 continue;
1323 }
1324 if (int128_gt(int128_make64(offset),
1325 int128_add(int128_make64(other->addr), other->size))
1326 || int128_le(int128_add(int128_make64(offset), subregion->size),
1327 int128_make64(other->addr))) {
1328 continue;
1329 }
1330 #if 0
1331 printf("warning: subregion collision %llx/%llx (%s) "
1332 "vs %llx/%llx (%s)\n",
1333 (unsigned long long)offset,
1334 (unsigned long long)int128_get64(subregion->size),
1335 subregion->name,
1336 (unsigned long long)other->addr,
1337 (unsigned long long)int128_get64(other->size),
1338 other->name);
1339 #endif
1340 }
1341 QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
1342 if (subregion->priority >= other->priority) {
1343 QTAILQ_INSERT_BEFORE(other, subregion, subregions_link);
1344 goto done;
1345 }
1346 }
1347 QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link);
1348 done:
1349 memory_region_update_pending |= mr->enabled && subregion->enabled;
1350 memory_region_transaction_commit();
1351 }
1352
1353
1354 void memory_region_add_subregion(MemoryRegion *mr,
1355 hwaddr offset,
1356 MemoryRegion *subregion)
1357 {
1358 subregion->may_overlap = false;
1359 subregion->priority = 0;
1360 memory_region_add_subregion_common(mr, offset, subregion);
1361 }
1362
1363 void memory_region_add_subregion_overlap(MemoryRegion *mr,
1364 hwaddr offset,
1365 MemoryRegion *subregion,
1366 unsigned priority)
1367 {
1368 subregion->may_overlap = true;
1369 subregion->priority = priority;
1370 memory_region_add_subregion_common(mr, offset, subregion);
1371 }
1372
1373 void memory_region_del_subregion(MemoryRegion *mr,
1374 MemoryRegion *subregion)
1375 {
1376 memory_region_transaction_begin();
1377 assert(subregion->parent == mr);
1378 subregion->parent = NULL;
1379 QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link);
1380 memory_region_update_pending |= mr->enabled && subregion->enabled;
1381 memory_region_transaction_commit();
1382 }
1383
1384 void memory_region_set_enabled(MemoryRegion *mr, bool enabled)
1385 {
1386 if (enabled == mr->enabled) {
1387 return;
1388 }
1389 memory_region_transaction_begin();
1390 mr->enabled = enabled;
1391 memory_region_update_pending = true;
1392 memory_region_transaction_commit();
1393 }
1394
1395 void memory_region_set_address(MemoryRegion *mr, hwaddr addr)
1396 {
1397 MemoryRegion *parent = mr->parent;
1398 unsigned priority = mr->priority;
1399 bool may_overlap = mr->may_overlap;
1400
1401 if (addr == mr->addr || !parent) {
1402 mr->addr = addr;
1403 return;
1404 }
1405
1406 memory_region_transaction_begin();
1407 memory_region_del_subregion(parent, mr);
1408 if (may_overlap) {
1409 memory_region_add_subregion_overlap(parent, addr, mr, priority);
1410 } else {
1411 memory_region_add_subregion(parent, addr, mr);
1412 }
1413 memory_region_transaction_commit();
1414 }
1415
1416 void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset)
1417 {
1418 assert(mr->alias);
1419
1420 if (offset == mr->alias_offset) {
1421 return;
1422 }
1423
1424 memory_region_transaction_begin();
1425 mr->alias_offset = offset;
1426 memory_region_update_pending |= mr->enabled;
1427 memory_region_transaction_commit();
1428 }
1429
1430 ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr)
1431 {
1432 return mr->ram_addr;
1433 }
1434
1435 static int cmp_flatrange_addr(const void *addr_, const void *fr_)
1436 {
1437 const AddrRange *addr = addr_;
1438 const FlatRange *fr = fr_;
1439
1440 if (int128_le(addrrange_end(*addr), fr->addr.start)) {
1441 return -1;
1442 } else if (int128_ge(addr->start, addrrange_end(fr->addr))) {
1443 return 1;
1444 }
1445 return 0;
1446 }
1447
1448 static FlatRange *address_space_lookup(AddressSpace *as, AddrRange addr)
1449 {
1450 return bsearch(&addr, as->current_map->ranges, as->current_map->nr,
1451 sizeof(FlatRange), cmp_flatrange_addr);
1452 }
1453
1454 MemoryRegionSection memory_region_find(MemoryRegion *address_space,
1455 hwaddr addr, uint64_t size)
1456 {
1457 AddressSpace *as = memory_region_to_address_space(address_space);
1458 AddrRange range = addrrange_make(int128_make64(addr),
1459 int128_make64(size));
1460 FlatRange *fr = address_space_lookup(as, range);
1461 MemoryRegionSection ret = { .mr = NULL, .size = 0 };
1462
1463 if (!fr) {
1464 return ret;
1465 }
1466
1467 while (fr > as->current_map->ranges
1468 && addrrange_intersects(fr[-1].addr, range)) {
1469 --fr;
1470 }
1471
1472 ret.mr = fr->mr;
1473 range = addrrange_intersection(range, fr->addr);
1474 ret.offset_within_region = fr->offset_in_region;
1475 ret.offset_within_region += int128_get64(int128_sub(range.start,
1476 fr->addr.start));
1477 ret.size = int128_get64(range.size);
1478 ret.offset_within_address_space = int128_get64(range.start);
1479 ret.readonly = fr->readonly;
1480 return ret;
1481 }
1482
1483 void memory_global_sync_dirty_bitmap(MemoryRegion *address_space)
1484 {
1485 AddressSpace *as = memory_region_to_address_space(address_space);
1486 FlatRange *fr;
1487
1488 FOR_EACH_FLAT_RANGE(fr, as->current_map) {
1489 MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
1490 }
1491 }
1492
1493 void memory_global_dirty_log_start(void)
1494 {
1495 global_dirty_log = true;
1496 MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward);
1497 }
1498
1499 void memory_global_dirty_log_stop(void)
1500 {
1501 global_dirty_log = false;
1502 MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse);
1503 }
1504
1505 static void listener_add_address_space(MemoryListener *listener,
1506 AddressSpace *as)
1507 {
1508 FlatRange *fr;
1509
1510 if (listener->address_space_filter
1511 && listener->address_space_filter != as) {
1512 return;
1513 }
1514
1515 if (global_dirty_log) {
1516 if (listener->log_global_start) {
1517 listener->log_global_start(listener);
1518 }
1519 }
1520
1521 FOR_EACH_FLAT_RANGE(fr, as->current_map) {
1522 MemoryRegionSection section = {
1523 .mr = fr->mr,
1524 .address_space = as,
1525 .offset_within_region = fr->offset_in_region,
1526 .size = int128_get64(fr->addr.size),
1527 .offset_within_address_space = int128_get64(fr->addr.start),
1528 .readonly = fr->readonly,
1529 };
1530 if (listener->region_add) {
1531 listener->region_add(listener, &section);
1532 }
1533 }
1534 }
1535
1536 void memory_listener_register(MemoryListener *listener, AddressSpace *filter)
1537 {
1538 MemoryListener *other = NULL;
1539 AddressSpace *as;
1540
1541 listener->address_space_filter = filter;
1542 if (QTAILQ_EMPTY(&memory_listeners)
1543 || listener->priority >= QTAILQ_LAST(&memory_listeners,
1544 memory_listeners)->priority) {
1545 QTAILQ_INSERT_TAIL(&memory_listeners, listener, link);
1546 } else {
1547 QTAILQ_FOREACH(other, &memory_listeners, link) {
1548 if (listener->priority < other->priority) {
1549 break;
1550 }
1551 }
1552 QTAILQ_INSERT_BEFORE(other, listener, link);
1553 }
1554
1555 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1556 listener_add_address_space(listener, as);
1557 }
1558 }
1559
1560 void memory_listener_unregister(MemoryListener *listener)
1561 {
1562 QTAILQ_REMOVE(&memory_listeners, listener, link);
1563 }
1564
1565 void address_space_init(AddressSpace *as, MemoryRegion *root)
1566 {
1567 memory_region_transaction_begin();
1568 as->root = root;
1569 as->current_map = g_new(FlatView, 1);
1570 flatview_init(as->current_map);
1571 QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link);
1572 as->name = NULL;
1573 memory_region_transaction_commit();
1574 address_space_init_dispatch(as);
1575 }
1576
1577 void address_space_destroy(AddressSpace *as)
1578 {
1579 /* Flush out anything from MemoryListeners listening in on this */
1580 memory_region_transaction_begin();
1581 as->root = NULL;
1582 memory_region_transaction_commit();
1583 QTAILQ_REMOVE(&address_spaces, as, address_spaces_link);
1584 address_space_destroy_dispatch(as);
1585 flatview_destroy(as->current_map);
1586 g_free(as->current_map);
1587 }
1588
1589 uint64_t io_mem_read(MemoryRegion *mr, hwaddr addr, unsigned size)
1590 {
1591 return memory_region_dispatch_read(mr, addr, size);
1592 }
1593
1594 void io_mem_write(MemoryRegion *mr, hwaddr addr,
1595 uint64_t val, unsigned size)
1596 {
1597 memory_region_dispatch_write(mr, addr, val, size);
1598 }
1599
1600 typedef struct MemoryRegionList MemoryRegionList;
1601
1602 struct MemoryRegionList {
1603 const MemoryRegion *mr;
1604 bool printed;
1605 QTAILQ_ENTRY(MemoryRegionList) queue;
1606 };
1607
1608 typedef QTAILQ_HEAD(queue, MemoryRegionList) MemoryRegionListHead;
1609
1610 static void mtree_print_mr(fprintf_function mon_printf, void *f,
1611 const MemoryRegion *mr, unsigned int level,
1612 hwaddr base,
1613 MemoryRegionListHead *alias_print_queue)
1614 {
1615 MemoryRegionList *new_ml, *ml, *next_ml;
1616 MemoryRegionListHead submr_print_queue;
1617 const MemoryRegion *submr;
1618 unsigned int i;
1619
1620 if (!mr || !mr->enabled) {
1621 return;
1622 }
1623
1624 for (i = 0; i < level; i++) {
1625 mon_printf(f, " ");
1626 }
1627
1628 if (mr->alias) {
1629 MemoryRegionList *ml;
1630 bool found = false;
1631
1632 /* check if the alias is already in the queue */
1633 QTAILQ_FOREACH(ml, alias_print_queue, queue) {
1634 if (ml->mr == mr->alias && !ml->printed) {
1635 found = true;
1636 }
1637 }
1638
1639 if (!found) {
1640 ml = g_new(MemoryRegionList, 1);
1641 ml->mr = mr->alias;
1642 ml->printed = false;
1643 QTAILQ_INSERT_TAIL(alias_print_queue, ml, queue);
1644 }
1645 mon_printf(f, TARGET_FMT_plx "-" TARGET_FMT_plx
1646 " (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx
1647 "-" TARGET_FMT_plx "\n",
1648 base + mr->addr,
1649 base + mr->addr
1650 + (hwaddr)int128_get64(mr->size) - 1,
1651 mr->priority,
1652 mr->readable ? 'R' : '-',
1653 !mr->readonly && !(mr->rom_device && mr->readable) ? 'W'
1654 : '-',
1655 mr->name,
1656 mr->alias->name,
1657 mr->alias_offset,
1658 mr->alias_offset
1659 + (hwaddr)int128_get64(mr->size) - 1);
1660 } else {
1661 mon_printf(f,
1662 TARGET_FMT_plx "-" TARGET_FMT_plx " (prio %d, %c%c): %s\n",
1663 base + mr->addr,
1664 base + mr->addr
1665 + (hwaddr)int128_get64(mr->size) - 1,
1666 mr->priority,
1667 mr->readable ? 'R' : '-',
1668 !mr->readonly && !(mr->rom_device && mr->readable) ? 'W'
1669 : '-',
1670 mr->name);
1671 }
1672
1673 QTAILQ_INIT(&submr_print_queue);
1674
1675 QTAILQ_FOREACH(submr, &mr->subregions, subregions_link) {
1676 new_ml = g_new(MemoryRegionList, 1);
1677 new_ml->mr = submr;
1678 QTAILQ_FOREACH(ml, &submr_print_queue, queue) {
1679 if (new_ml->mr->addr < ml->mr->addr ||
1680 (new_ml->mr->addr == ml->mr->addr &&
1681 new_ml->mr->priority > ml->mr->priority)) {
1682 QTAILQ_INSERT_BEFORE(ml, new_ml, queue);
1683 new_ml = NULL;
1684 break;
1685 }
1686 }
1687 if (new_ml) {
1688 QTAILQ_INSERT_TAIL(&submr_print_queue, new_ml, queue);
1689 }
1690 }
1691
1692 QTAILQ_FOREACH(ml, &submr_print_queue, queue) {
1693 mtree_print_mr(mon_printf, f, ml->mr, level + 1, base + mr->addr,
1694 alias_print_queue);
1695 }
1696
1697 QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, queue, next_ml) {
1698 g_free(ml);
1699 }
1700 }
1701
1702 void mtree_info(fprintf_function mon_printf, void *f)
1703 {
1704 MemoryRegionListHead ml_head;
1705 MemoryRegionList *ml, *ml2;
1706 AddressSpace *as;
1707
1708 QTAILQ_INIT(&ml_head);
1709
1710 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1711 if (!as->name) {
1712 continue;
1713 }
1714 mon_printf(f, "%s\n", as->name);
1715 mtree_print_mr(mon_printf, f, as->root, 0, 0, &ml_head);
1716 }
1717
1718 mon_printf(f, "aliases\n");
1719 /* print aliased regions */
1720 QTAILQ_FOREACH(ml, &ml_head, queue) {
1721 if (!ml->printed) {
1722 mon_printf(f, "%s\n", ml->mr->name);
1723 mtree_print_mr(mon_printf, f, ml->mr, 0, 0, &ml_head);
1724 }
1725 }
1726
1727 QTAILQ_FOREACH_SAFE(ml, &ml_head, queue, ml2) {
1728 g_free(ml);
1729 }
1730 }
QEmu