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