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