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rcu: Use automatic rc_read unlock in core memory/exec code
[mirror_qemu.git] / memory.c
1 /*
2 * Physical memory management
3 *
4 * Copyright 2011 Red Hat, Inc. and/or its affiliates
5 *
6 * Authors:
7 * Avi Kivity <avi@redhat.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
11 *
12 * Contributions after 2012-01-13 are licensed under the terms of the
13 * GNU GPL, version 2 or (at your option) any later version.
14 */
15
16 #include "qemu/osdep.h"
17 #include "qapi/error.h"
18 #include "cpu.h"
19 #include "exec/memory.h"
20 #include "exec/address-spaces.h"
21 #include "qapi/visitor.h"
22 #include "qemu/bitops.h"
23 #include "qemu/error-report.h"
24 #include "qemu/main-loop.h"
25 #include "qemu/qemu-print.h"
26 #include "qom/object.h"
27 #include "trace-root.h"
28
29 #include "exec/memory-internal.h"
30 #include "exec/ram_addr.h"
31 #include "sysemu/kvm.h"
32 #include "sysemu/runstate.h"
33 #include "sysemu/tcg.h"
34 #include "sysemu/accel.h"
35 #include "hw/boards.h"
36 #include "migration/vmstate.h"
37
38 //#define DEBUG_UNASSIGNED
39
40 static unsigned memory_region_transaction_depth;
41 static bool memory_region_update_pending;
42 static bool ioeventfd_update_pending;
43 bool global_dirty_log;
44
45 static QTAILQ_HEAD(, MemoryListener) memory_listeners
46 = QTAILQ_HEAD_INITIALIZER(memory_listeners);
47
48 static QTAILQ_HEAD(, AddressSpace) address_spaces
49 = QTAILQ_HEAD_INITIALIZER(address_spaces);
50
51 static GHashTable *flat_views;
52
53 typedef struct AddrRange AddrRange;
54
55 /*
56 * Note that signed integers are needed for negative offsetting in aliases
57 * (large MemoryRegion::alias_offset).
58 */
59 struct AddrRange {
60 Int128 start;
61 Int128 size;
62 };
63
64 static AddrRange addrrange_make(Int128 start, Int128 size)
65 {
66 return (AddrRange) { start, size };
67 }
68
69 static bool addrrange_equal(AddrRange r1, AddrRange r2)
70 {
71 return int128_eq(r1.start, r2.start) && int128_eq(r1.size, r2.size);
72 }
73
74 static Int128 addrrange_end(AddrRange r)
75 {
76 return int128_add(r.start, r.size);
77 }
78
79 static AddrRange addrrange_shift(AddrRange range, Int128 delta)
80 {
81 int128_addto(&range.start, delta);
82 return range;
83 }
84
85 static bool addrrange_contains(AddrRange range, Int128 addr)
86 {
87 return int128_ge(addr, range.start)
88 && int128_lt(addr, addrrange_end(range));
89 }
90
91 static bool addrrange_intersects(AddrRange r1, AddrRange r2)
92 {
93 return addrrange_contains(r1, r2.start)
94 || addrrange_contains(r2, r1.start);
95 }
96
97 static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2)
98 {
99 Int128 start = int128_max(r1.start, r2.start);
100 Int128 end = int128_min(addrrange_end(r1), addrrange_end(r2));
101 return addrrange_make(start, int128_sub(end, start));
102 }
103
104 enum ListenerDirection { Forward, Reverse };
105
106 #define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
107 do { \
108 MemoryListener *_listener; \
109 \
110 switch (_direction) { \
111 case Forward: \
112 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
113 if (_listener->_callback) { \
114 _listener->_callback(_listener, ##_args); \
115 } \
116 } \
117 break; \
118 case Reverse: \
119 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, link) { \
120 if (_listener->_callback) { \
121 _listener->_callback(_listener, ##_args); \
122 } \
123 } \
124 break; \
125 default: \
126 abort(); \
127 } \
128 } while (0)
129
130 #define MEMORY_LISTENER_CALL(_as, _callback, _direction, _section, _args...) \
131 do { \
132 MemoryListener *_listener; \
133 \
134 switch (_direction) { \
135 case Forward: \
136 QTAILQ_FOREACH(_listener, &(_as)->listeners, link_as) { \
137 if (_listener->_callback) { \
138 _listener->_callback(_listener, _section, ##_args); \
139 } \
140 } \
141 break; \
142 case Reverse: \
143 QTAILQ_FOREACH_REVERSE(_listener, &(_as)->listeners, link_as) { \
144 if (_listener->_callback) { \
145 _listener->_callback(_listener, _section, ##_args); \
146 } \
147 } \
148 break; \
149 default: \
150 abort(); \
151 } \
152 } while (0)
153
154 /* No need to ref/unref .mr, the FlatRange keeps it alive. */
155 #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback, _args...) \
156 do { \
157 MemoryRegionSection mrs = section_from_flat_range(fr, \
158 address_space_to_flatview(as)); \
159 MEMORY_LISTENER_CALL(as, callback, dir, &mrs, ##_args); \
160 } while(0)
161
162 struct CoalescedMemoryRange {
163 AddrRange addr;
164 QTAILQ_ENTRY(CoalescedMemoryRange) link;
165 };
166
167 struct MemoryRegionIoeventfd {
168 AddrRange addr;
169 bool match_data;
170 uint64_t data;
171 EventNotifier *e;
172 };
173
174 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd *a,
175 MemoryRegionIoeventfd *b)
176 {
177 if (int128_lt(a->addr.start, b->addr.start)) {
178 return true;
179 } else if (int128_gt(a->addr.start, b->addr.start)) {
180 return false;
181 } else if (int128_lt(a->addr.size, b->addr.size)) {
182 return true;
183 } else if (int128_gt(a->addr.size, b->addr.size)) {
184 return false;
185 } else if (a->match_data < b->match_data) {
186 return true;
187 } else if (a->match_data > b->match_data) {
188 return false;
189 } else if (a->match_data) {
190 if (a->data < b->data) {
191 return true;
192 } else if (a->data > b->data) {
193 return false;
194 }
195 }
196 if (a->e < b->e) {
197 return true;
198 } else if (a->e > b->e) {
199 return false;
200 }
201 return false;
202 }
203
204 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd *a,
205 MemoryRegionIoeventfd *b)
206 {
207 return !memory_region_ioeventfd_before(a, b)
208 && !memory_region_ioeventfd_before(b, a);
209 }
210
211 /* Range of memory in the global map. Addresses are absolute. */
212 struct FlatRange {
213 MemoryRegion *mr;
214 hwaddr offset_in_region;
215 AddrRange addr;
216 uint8_t dirty_log_mask;
217 bool romd_mode;
218 bool readonly;
219 bool nonvolatile;
220 };
221
222 #define FOR_EACH_FLAT_RANGE(var, view) \
223 for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
224
225 static inline MemoryRegionSection
226 section_from_flat_range(FlatRange *fr, FlatView *fv)
227 {
228 return (MemoryRegionSection) {
229 .mr = fr->mr,
230 .fv = fv,
231 .offset_within_region = fr->offset_in_region,
232 .size = fr->addr.size,
233 .offset_within_address_space = int128_get64(fr->addr.start),
234 .readonly = fr->readonly,
235 .nonvolatile = fr->nonvolatile,
236 };
237 }
238
239 static bool flatrange_equal(FlatRange *a, FlatRange *b)
240 {
241 return a->mr == b->mr
242 && addrrange_equal(a->addr, b->addr)
243 && a->offset_in_region == b->offset_in_region
244 && a->romd_mode == b->romd_mode
245 && a->readonly == b->readonly
246 && a->nonvolatile == b->nonvolatile;
247 }
248
249 static FlatView *flatview_new(MemoryRegion *mr_root)
250 {
251 FlatView *view;
252
253 view = g_new0(FlatView, 1);
254 view->ref = 1;
255 view->root = mr_root;
256 memory_region_ref(mr_root);
257 trace_flatview_new(view, mr_root);
258
259 return view;
260 }
261
262 /* Insert a range into a given position. Caller is responsible for maintaining
263 * sorting order.
264 */
265 static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range)
266 {
267 if (view->nr == view->nr_allocated) {
268 view->nr_allocated = MAX(2 * view->nr, 10);
269 view->ranges = g_realloc(view->ranges,
270 view->nr_allocated * sizeof(*view->ranges));
271 }
272 memmove(view->ranges + pos + 1, view->ranges + pos,
273 (view->nr - pos) * sizeof(FlatRange));
274 view->ranges[pos] = *range;
275 memory_region_ref(range->mr);
276 ++view->nr;
277 }
278
279 static void flatview_destroy(FlatView *view)
280 {
281 int i;
282
283 trace_flatview_destroy(view, view->root);
284 if (view->dispatch) {
285 address_space_dispatch_free(view->dispatch);
286 }
287 for (i = 0; i < view->nr; i++) {
288 memory_region_unref(view->ranges[i].mr);
289 }
290 g_free(view->ranges);
291 memory_region_unref(view->root);
292 g_free(view);
293 }
294
295 static bool flatview_ref(FlatView *view)
296 {
297 return atomic_fetch_inc_nonzero(&view->ref) > 0;
298 }
299
300 void flatview_unref(FlatView *view)
301 {
302 if (atomic_fetch_dec(&view->ref) == 1) {
303 trace_flatview_destroy_rcu(view, view->root);
304 assert(view->root);
305 call_rcu(view, flatview_destroy, rcu);
306 }
307 }
308
309 static bool can_merge(FlatRange *r1, FlatRange *r2)
310 {
311 return int128_eq(addrrange_end(r1->addr), r2->addr.start)
312 && r1->mr == r2->mr
313 && int128_eq(int128_add(int128_make64(r1->offset_in_region),
314 r1->addr.size),
315 int128_make64(r2->offset_in_region))
316 && r1->dirty_log_mask == r2->dirty_log_mask
317 && r1->romd_mode == r2->romd_mode
318 && r1->readonly == r2->readonly
319 && r1->nonvolatile == r2->nonvolatile;
320 }
321
322 /* Attempt to simplify a view by merging adjacent ranges */
323 static void flatview_simplify(FlatView *view)
324 {
325 unsigned i, j, k;
326
327 i = 0;
328 while (i < view->nr) {
329 j = i + 1;
330 while (j < view->nr
331 && can_merge(&view->ranges[j-1], &view->ranges[j])) {
332 int128_addto(&view->ranges[i].addr.size, view->ranges[j].addr.size);
333 ++j;
334 }
335 ++i;
336 for (k = i; k < j; k++) {
337 memory_region_unref(view->ranges[k].mr);
338 }
339 memmove(&view->ranges[i], &view->ranges[j],
340 (view->nr - j) * sizeof(view->ranges[j]));
341 view->nr -= j - i;
342 }
343 }
344
345 static 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
354 static void adjust_endianness(MemoryRegion *mr, uint64_t *data, MemOp op)
355 {
356 if ((op & MO_BSWAP) != devend_memop(mr->ops->endianness)) {
357 switch (op & MO_SIZE) {
358 case MO_8:
359 break;
360 case MO_16:
361 *data = bswap16(*data);
362 break;
363 case MO_32:
364 *data = bswap32(*data);
365 break;
366 case MO_64:
367 *data = bswap64(*data);
368 break;
369 default:
370 g_assert_not_reached();
371 }
372 }
373 }
374
375 static inline void memory_region_shift_read_access(uint64_t *value,
376 signed shift,
377 uint64_t mask,
378 uint64_t tmp)
379 {
380 if (shift >= 0) {
381 *value |= (tmp & mask) << shift;
382 } else {
383 *value |= (tmp & mask) >> -shift;
384 }
385 }
386
387 static inline uint64_t memory_region_shift_write_access(uint64_t *value,
388 signed shift,
389 uint64_t mask)
390 {
391 uint64_t tmp;
392
393 if (shift >= 0) {
394 tmp = (*value >> shift) & mask;
395 } else {
396 tmp = (*value << -shift) & mask;
397 }
398
399 return tmp;
400 }
401
402 static hwaddr memory_region_to_absolute_addr(MemoryRegion *mr, hwaddr offset)
403 {
404 MemoryRegion *root;
405 hwaddr abs_addr = offset;
406
407 abs_addr += mr->addr;
408 for (root = mr; root->container; ) {
409 root = root->container;
410 abs_addr += root->addr;
411 }
412
413 return abs_addr;
414 }
415
416 static int get_cpu_index(void)
417 {
418 if (current_cpu) {
419 return current_cpu->cpu_index;
420 }
421 return -1;
422 }
423
424 static MemTxResult memory_region_read_accessor(MemoryRegion *mr,
425 hwaddr addr,
426 uint64_t *value,
427 unsigned size,
428 signed shift,
429 uint64_t mask,
430 MemTxAttrs attrs)
431 {
432 uint64_t tmp;
433
434 tmp = mr->ops->read(mr->opaque, addr, size);
435 if (mr->subpage) {
436 trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size);
437 } else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED) {
438 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
439 trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
440 }
441 memory_region_shift_read_access(value, shift, mask, tmp);
442 return MEMTX_OK;
443 }
444
445 static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
446 hwaddr addr,
447 uint64_t *value,
448 unsigned size,
449 signed shift,
450 uint64_t mask,
451 MemTxAttrs attrs)
452 {
453 uint64_t tmp = 0;
454 MemTxResult r;
455
456 r = mr->ops->read_with_attrs(mr->opaque, addr, &tmp, size, attrs);
457 if (mr->subpage) {
458 trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size);
459 } else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED) {
460 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
461 trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
462 }
463 memory_region_shift_read_access(value, shift, mask, tmp);
464 return r;
465 }
466
467 static MemTxResult memory_region_write_accessor(MemoryRegion *mr,
468 hwaddr addr,
469 uint64_t *value,
470 unsigned size,
471 signed shift,
472 uint64_t mask,
473 MemTxAttrs attrs)
474 {
475 uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
476
477 if (mr->subpage) {
478 trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
479 } else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED) {
480 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
481 trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
482 }
483 mr->ops->write(mr->opaque, addr, tmp, size);
484 return MEMTX_OK;
485 }
486
487 static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr,
488 hwaddr addr,
489 uint64_t *value,
490 unsigned size,
491 signed shift,
492 uint64_t mask,
493 MemTxAttrs attrs)
494 {
495 uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
496
497 if (mr->subpage) {
498 trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
499 } else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED) {
500 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
501 trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
502 }
503 return mr->ops->write_with_attrs(mr->opaque, addr, tmp, size, attrs);
504 }
505
506 static MemTxResult access_with_adjusted_size(hwaddr addr,
507 uint64_t *value,
508 unsigned size,
509 unsigned access_size_min,
510 unsigned access_size_max,
511 MemTxResult (*access_fn)
512 (MemoryRegion *mr,
513 hwaddr addr,
514 uint64_t *value,
515 unsigned size,
516 signed shift,
517 uint64_t mask,
518 MemTxAttrs attrs),
519 MemoryRegion *mr,
520 MemTxAttrs attrs)
521 {
522 uint64_t access_mask;
523 unsigned access_size;
524 unsigned i;
525 MemTxResult r = MEMTX_OK;
526
527 if (!access_size_min) {
528 access_size_min = 1;
529 }
530 if (!access_size_max) {
531 access_size_max = 4;
532 }
533
534 /* FIXME: support unaligned access? */
535 access_size = MAX(MIN(size, access_size_max), access_size_min);
536 access_mask = MAKE_64BIT_MASK(0, access_size * 8);
537 if (memory_region_big_endian(mr)) {
538 for (i = 0; i < size; i += access_size) {
539 r |= access_fn(mr, addr + i, value, access_size,
540 (size - access_size - i) * 8, access_mask, attrs);
541 }
542 } else {
543 for (i = 0; i < size; i += access_size) {
544 r |= access_fn(mr, addr + i, value, access_size, i * 8,
545 access_mask, attrs);
546 }
547 }
548 return r;
549 }
550
551 static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
552 {
553 AddressSpace *as;
554
555 while (mr->container) {
556 mr = mr->container;
557 }
558 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
559 if (mr == as->root) {
560 return as;
561 }
562 }
563 return NULL;
564 }
565
566 /* Render a memory region into the global view. Ranges in @view obscure
567 * ranges in @mr.
568 */
569 static void render_memory_region(FlatView *view,
570 MemoryRegion *mr,
571 Int128 base,
572 AddrRange clip,
573 bool readonly,
574 bool nonvolatile)
575 {
576 MemoryRegion *subregion;
577 unsigned i;
578 hwaddr offset_in_region;
579 Int128 remain;
580 Int128 now;
581 FlatRange fr;
582 AddrRange tmp;
583
584 if (!mr->enabled) {
585 return;
586 }
587
588 int128_addto(&base, int128_make64(mr->addr));
589 readonly |= mr->readonly;
590 nonvolatile |= mr->nonvolatile;
591
592 tmp = addrrange_make(base, mr->size);
593
594 if (!addrrange_intersects(tmp, clip)) {
595 return;
596 }
597
598 clip = addrrange_intersection(tmp, clip);
599
600 if (mr->alias) {
601 int128_subfrom(&base, int128_make64(mr->alias->addr));
602 int128_subfrom(&base, int128_make64(mr->alias_offset));
603 render_memory_region(view, mr->alias, base, clip,
604 readonly, nonvolatile);
605 return;
606 }
607
608 /* Render subregions in priority order. */
609 QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
610 render_memory_region(view, subregion, base, clip,
611 readonly, nonvolatile);
612 }
613
614 if (!mr->terminates) {
615 return;
616 }
617
618 offset_in_region = int128_get64(int128_sub(clip.start, base));
619 base = clip.start;
620 remain = clip.size;
621
622 fr.mr = mr;
623 fr.dirty_log_mask = memory_region_get_dirty_log_mask(mr);
624 fr.romd_mode = mr->romd_mode;
625 fr.readonly = readonly;
626 fr.nonvolatile = nonvolatile;
627
628 /* Render the region itself into any gaps left by the current view. */
629 for (i = 0; i < view->nr && int128_nz(remain); ++i) {
630 if (int128_ge(base, addrrange_end(view->ranges[i].addr))) {
631 continue;
632 }
633 if (int128_lt(base, view->ranges[i].addr.start)) {
634 now = int128_min(remain,
635 int128_sub(view->ranges[i].addr.start, base));
636 fr.offset_in_region = offset_in_region;
637 fr.addr = addrrange_make(base, now);
638 flatview_insert(view, i, &fr);
639 ++i;
640 int128_addto(&base, now);
641 offset_in_region += int128_get64(now);
642 int128_subfrom(&remain, now);
643 }
644 now = int128_sub(int128_min(int128_add(base, remain),
645 addrrange_end(view->ranges[i].addr)),
646 base);
647 int128_addto(&base, now);
648 offset_in_region += int128_get64(now);
649 int128_subfrom(&remain, now);
650 }
651 if (int128_nz(remain)) {
652 fr.offset_in_region = offset_in_region;
653 fr.addr = addrrange_make(base, remain);
654 flatview_insert(view, i, &fr);
655 }
656 }
657
658 static MemoryRegion *memory_region_get_flatview_root(MemoryRegion *mr)
659 {
660 while (mr->enabled) {
661 if (mr->alias) {
662 if (!mr->alias_offset && int128_ge(mr->size, mr->alias->size)) {
663 /* The alias is included in its entirety. Use it as
664 * the "real" root, so that we can share more FlatViews.
665 */
666 mr = mr->alias;
667 continue;
668 }
669 } else if (!mr->terminates) {
670 unsigned int found = 0;
671 MemoryRegion *child, *next = NULL;
672 QTAILQ_FOREACH(child, &mr->subregions, subregions_link) {
673 if (child->enabled) {
674 if (++found > 1) {
675 next = NULL;
676 break;
677 }
678 if (!child->addr && int128_ge(mr->size, child->size)) {
679 /* A child is included in its entirety. If it's the only
680 * enabled one, use it in the hope of finding an alias down the
681 * way. This will also let us share FlatViews.
682 */
683 next = child;
684 }
685 }
686 }
687 if (found == 0) {
688 return NULL;
689 }
690 if (next) {
691 mr = next;
692 continue;
693 }
694 }
695
696 return mr;
697 }
698
699 return NULL;
700 }
701
702 /* Render a memory topology into a list of disjoint absolute ranges. */
703 static FlatView *generate_memory_topology(MemoryRegion *mr)
704 {
705 int i;
706 FlatView *view;
707
708 view = flatview_new(mr);
709
710 if (mr) {
711 render_memory_region(view, mr, int128_zero(),
712 addrrange_make(int128_zero(), int128_2_64()),
713 false, false);
714 }
715 flatview_simplify(view);
716
717 view->dispatch = address_space_dispatch_new(view);
718 for (i = 0; i < view->nr; i++) {
719 MemoryRegionSection mrs =
720 section_from_flat_range(&view->ranges[i], view);
721 flatview_add_to_dispatch(view, &mrs);
722 }
723 address_space_dispatch_compact(view->dispatch);
724 g_hash_table_replace(flat_views, mr, view);
725
726 return view;
727 }
728
729 static void address_space_add_del_ioeventfds(AddressSpace *as,
730 MemoryRegionIoeventfd *fds_new,
731 unsigned fds_new_nb,
732 MemoryRegionIoeventfd *fds_old,
733 unsigned fds_old_nb)
734 {
735 unsigned iold, inew;
736 MemoryRegionIoeventfd *fd;
737 MemoryRegionSection section;
738
739 /* Generate a symmetric difference of the old and new fd sets, adding
740 * and deleting as necessary.
741 */
742
743 iold = inew = 0;
744 while (iold < fds_old_nb || inew < fds_new_nb) {
745 if (iold < fds_old_nb
746 && (inew == fds_new_nb
747 || memory_region_ioeventfd_before(&fds_old[iold],
748 &fds_new[inew]))) {
749 fd = &fds_old[iold];
750 section = (MemoryRegionSection) {
751 .fv = address_space_to_flatview(as),
752 .offset_within_address_space = int128_get64(fd->addr.start),
753 .size = fd->addr.size,
754 };
755 MEMORY_LISTENER_CALL(as, eventfd_del, Forward, &section,
756 fd->match_data, fd->data, fd->e);
757 ++iold;
758 } else if (inew < fds_new_nb
759 && (iold == fds_old_nb
760 || memory_region_ioeventfd_before(&fds_new[inew],
761 &fds_old[iold]))) {
762 fd = &fds_new[inew];
763 section = (MemoryRegionSection) {
764 .fv = address_space_to_flatview(as),
765 .offset_within_address_space = int128_get64(fd->addr.start),
766 .size = fd->addr.size,
767 };
768 MEMORY_LISTENER_CALL(as, eventfd_add, Reverse, &section,
769 fd->match_data, fd->data, fd->e);
770 ++inew;
771 } else {
772 ++iold;
773 ++inew;
774 }
775 }
776 }
777
778 FlatView *address_space_get_flatview(AddressSpace *as)
779 {
780 FlatView *view;
781
782 RCU_READ_LOCK_GUARD();
783 do {
784 view = address_space_to_flatview(as);
785 /* If somebody has replaced as->current_map concurrently,
786 * flatview_ref returns false.
787 */
788 } while (!flatview_ref(view));
789 return view;
790 }
791
792 static void address_space_update_ioeventfds(AddressSpace *as)
793 {
794 FlatView *view;
795 FlatRange *fr;
796 unsigned ioeventfd_nb = 0;
797 MemoryRegionIoeventfd *ioeventfds = NULL;
798 AddrRange tmp;
799 unsigned i;
800
801 view = address_space_get_flatview(as);
802 FOR_EACH_FLAT_RANGE(fr, view) {
803 for (i = 0; i < fr->mr->ioeventfd_nb; ++i) {
804 tmp = addrrange_shift(fr->mr->ioeventfds[i].addr,
805 int128_sub(fr->addr.start,
806 int128_make64(fr->offset_in_region)));
807 if (addrrange_intersects(fr->addr, tmp)) {
808 ++ioeventfd_nb;
809 ioeventfds = g_realloc(ioeventfds,
810 ioeventfd_nb * sizeof(*ioeventfds));
811 ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i];
812 ioeventfds[ioeventfd_nb-1].addr = tmp;
813 }
814 }
815 }
816
817 address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb,
818 as->ioeventfds, as->ioeventfd_nb);
819
820 g_free(as->ioeventfds);
821 as->ioeventfds = ioeventfds;
822 as->ioeventfd_nb = ioeventfd_nb;
823 flatview_unref(view);
824 }
825
826 /*
827 * Notify the memory listeners about the coalesced IO change events of
828 * range `cmr'. Only the part that has intersection of the specified
829 * FlatRange will be sent.
830 */
831 static void flat_range_coalesced_io_notify(FlatRange *fr, AddressSpace *as,
832 CoalescedMemoryRange *cmr, bool add)
833 {
834 AddrRange tmp;
835
836 tmp = addrrange_shift(cmr->addr,
837 int128_sub(fr->addr.start,
838 int128_make64(fr->offset_in_region)));
839 if (!addrrange_intersects(tmp, fr->addr)) {
840 return;
841 }
842 tmp = addrrange_intersection(tmp, fr->addr);
843
844 if (add) {
845 MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, coalesced_io_add,
846 int128_get64(tmp.start),
847 int128_get64(tmp.size));
848 } else {
849 MEMORY_LISTENER_UPDATE_REGION(fr, as, Reverse, coalesced_io_del,
850 int128_get64(tmp.start),
851 int128_get64(tmp.size));
852 }
853 }
854
855 static void flat_range_coalesced_io_del(FlatRange *fr, AddressSpace *as)
856 {
857 CoalescedMemoryRange *cmr;
858
859 QTAILQ_FOREACH(cmr, &fr->mr->coalesced, link) {
860 flat_range_coalesced_io_notify(fr, as, cmr, false);
861 }
862 }
863
864 static void flat_range_coalesced_io_add(FlatRange *fr, AddressSpace *as)
865 {
866 MemoryRegion *mr = fr->mr;
867 CoalescedMemoryRange *cmr;
868
869 if (QTAILQ_EMPTY(&mr->coalesced)) {
870 return;
871 }
872
873 QTAILQ_FOREACH(cmr, &mr->coalesced, link) {
874 flat_range_coalesced_io_notify(fr, as, cmr, true);
875 }
876 }
877
878 static void address_space_update_topology_pass(AddressSpace *as,
879 const FlatView *old_view,
880 const FlatView *new_view,
881 bool adding)
882 {
883 unsigned iold, inew;
884 FlatRange *frold, *frnew;
885
886 /* Generate a symmetric difference of the old and new memory maps.
887 * Kill ranges in the old map, and instantiate ranges in the new map.
888 */
889 iold = inew = 0;
890 while (iold < old_view->nr || inew < new_view->nr) {
891 if (iold < old_view->nr) {
892 frold = &old_view->ranges[iold];
893 } else {
894 frold = NULL;
895 }
896 if (inew < new_view->nr) {
897 frnew = &new_view->ranges[inew];
898 } else {
899 frnew = NULL;
900 }
901
902 if (frold
903 && (!frnew
904 || int128_lt(frold->addr.start, frnew->addr.start)
905 || (int128_eq(frold->addr.start, frnew->addr.start)
906 && !flatrange_equal(frold, frnew)))) {
907 /* In old but not in new, or in both but attributes changed. */
908
909 if (!adding) {
910 flat_range_coalesced_io_del(frold, as);
911 MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del);
912 }
913
914 ++iold;
915 } else if (frold && frnew && flatrange_equal(frold, frnew)) {
916 /* In both and unchanged (except logging may have changed) */
917
918 if (adding) {
919 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop);
920 if (frnew->dirty_log_mask & ~frold->dirty_log_mask) {
921 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start,
922 frold->dirty_log_mask,
923 frnew->dirty_log_mask);
924 }
925 if (frold->dirty_log_mask & ~frnew->dirty_log_mask) {
926 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop,
927 frold->dirty_log_mask,
928 frnew->dirty_log_mask);
929 }
930 }
931
932 ++iold;
933 ++inew;
934 } else {
935 /* In new */
936
937 if (adding) {
938 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add);
939 flat_range_coalesced_io_add(frnew, as);
940 }
941
942 ++inew;
943 }
944 }
945 }
946
947 static void flatviews_init(void)
948 {
949 static FlatView *empty_view;
950
951 if (flat_views) {
952 return;
953 }
954
955 flat_views = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL,
956 (GDestroyNotify) flatview_unref);
957 if (!empty_view) {
958 empty_view = generate_memory_topology(NULL);
959 /* We keep it alive forever in the global variable. */
960 flatview_ref(empty_view);
961 } else {
962 g_hash_table_replace(flat_views, NULL, empty_view);
963 flatview_ref(empty_view);
964 }
965 }
966
967 static void flatviews_reset(void)
968 {
969 AddressSpace *as;
970
971 if (flat_views) {
972 g_hash_table_unref(flat_views);
973 flat_views = NULL;
974 }
975 flatviews_init();
976
977 /* Render unique FVs */
978 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
979 MemoryRegion *physmr = memory_region_get_flatview_root(as->root);
980
981 if (g_hash_table_lookup(flat_views, physmr)) {
982 continue;
983 }
984
985 generate_memory_topology(physmr);
986 }
987 }
988
989 static void address_space_set_flatview(AddressSpace *as)
990 {
991 FlatView *old_view = address_space_to_flatview(as);
992 MemoryRegion *physmr = memory_region_get_flatview_root(as->root);
993 FlatView *new_view = g_hash_table_lookup(flat_views, physmr);
994
995 assert(new_view);
996
997 if (old_view == new_view) {
998 return;
999 }
1000
1001 if (old_view) {
1002 flatview_ref(old_view);
1003 }
1004
1005 flatview_ref(new_view);
1006
1007 if (!QTAILQ_EMPTY(&as->listeners)) {
1008 FlatView tmpview = { .nr = 0 }, *old_view2 = old_view;
1009
1010 if (!old_view2) {
1011 old_view2 = &tmpview;
1012 }
1013 address_space_update_topology_pass(as, old_view2, new_view, false);
1014 address_space_update_topology_pass(as, old_view2, new_view, true);
1015 }
1016
1017 /* Writes are protected by the BQL. */
1018 atomic_rcu_set(&as->current_map, new_view);
1019 if (old_view) {
1020 flatview_unref(old_view);
1021 }
1022
1023 /* Note that all the old MemoryRegions are still alive up to this
1024 * point. This relieves most MemoryListeners from the need to
1025 * ref/unref the MemoryRegions they get---unless they use them
1026 * outside the iothread mutex, in which case precise reference
1027 * counting is necessary.
1028 */
1029 if (old_view) {
1030 flatview_unref(old_view);
1031 }
1032 }
1033
1034 static void address_space_update_topology(AddressSpace *as)
1035 {
1036 MemoryRegion *physmr = memory_region_get_flatview_root(as->root);
1037
1038 flatviews_init();
1039 if (!g_hash_table_lookup(flat_views, physmr)) {
1040 generate_memory_topology(physmr);
1041 }
1042 address_space_set_flatview(as);
1043 }
1044
1045 void memory_region_transaction_begin(void)
1046 {
1047 qemu_flush_coalesced_mmio_buffer();
1048 ++memory_region_transaction_depth;
1049 }
1050
1051 void memory_region_transaction_commit(void)
1052 {
1053 AddressSpace *as;
1054
1055 assert(memory_region_transaction_depth);
1056 assert(qemu_mutex_iothread_locked());
1057
1058 --memory_region_transaction_depth;
1059 if (!memory_region_transaction_depth) {
1060 if (memory_region_update_pending) {
1061 flatviews_reset();
1062
1063 MEMORY_LISTENER_CALL_GLOBAL(begin, Forward);
1064
1065 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1066 address_space_set_flatview(as);
1067 address_space_update_ioeventfds(as);
1068 }
1069 memory_region_update_pending = false;
1070 ioeventfd_update_pending = false;
1071 MEMORY_LISTENER_CALL_GLOBAL(commit, Forward);
1072 } else if (ioeventfd_update_pending) {
1073 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1074 address_space_update_ioeventfds(as);
1075 }
1076 ioeventfd_update_pending = false;
1077 }
1078 }
1079 }
1080
1081 static void memory_region_destructor_none(MemoryRegion *mr)
1082 {
1083 }
1084
1085 static void memory_region_destructor_ram(MemoryRegion *mr)
1086 {
1087 qemu_ram_free(mr->ram_block);
1088 }
1089
1090 static bool memory_region_need_escape(char c)
1091 {
1092 return c == '/' || c == '[' || c == '\\' || c == ']';
1093 }
1094
1095 static char *memory_region_escape_name(const char *name)
1096 {
1097 const char *p;
1098 char *escaped, *q;
1099 uint8_t c;
1100 size_t bytes = 0;
1101
1102 for (p = name; *p; p++) {
1103 bytes += memory_region_need_escape(*p) ? 4 : 1;
1104 }
1105 if (bytes == p - name) {
1106 return g_memdup(name, bytes + 1);
1107 }
1108
1109 escaped = g_malloc(bytes + 1);
1110 for (p = name, q = escaped; *p; p++) {
1111 c = *p;
1112 if (unlikely(memory_region_need_escape(c))) {
1113 *q++ = '\\';
1114 *q++ = 'x';
1115 *q++ = "0123456789abcdef"[c >> 4];
1116 c = "0123456789abcdef"[c & 15];
1117 }
1118 *q++ = c;
1119 }
1120 *q = 0;
1121 return escaped;
1122 }
1123
1124 static void memory_region_do_init(MemoryRegion *mr,
1125 Object *owner,
1126 const char *name,
1127 uint64_t size)
1128 {
1129 mr->size = int128_make64(size);
1130 if (size == UINT64_MAX) {
1131 mr->size = int128_2_64();
1132 }
1133 mr->name = g_strdup(name);
1134 mr->owner = owner;
1135 mr->ram_block = NULL;
1136
1137 if (name) {
1138 char *escaped_name = memory_region_escape_name(name);
1139 char *name_array = g_strdup_printf("%s[*]", escaped_name);
1140
1141 if (!owner) {
1142 owner = container_get(qdev_get_machine(), "/unattached");
1143 }
1144
1145 object_property_add_child(owner, name_array, OBJECT(mr), &error_abort);
1146 object_unref(OBJECT(mr));
1147 g_free(name_array);
1148 g_free(escaped_name);
1149 }
1150 }
1151
1152 void memory_region_init(MemoryRegion *mr,
1153 Object *owner,
1154 const char *name,
1155 uint64_t size)
1156 {
1157 object_initialize(mr, sizeof(*mr), TYPE_MEMORY_REGION);
1158 memory_region_do_init(mr, owner, name, size);
1159 }
1160
1161 static void memory_region_get_addr(Object *obj, Visitor *v, const char *name,
1162 void *opaque, Error **errp)
1163 {
1164 MemoryRegion *mr = MEMORY_REGION(obj);
1165 uint64_t value = mr->addr;
1166
1167 visit_type_uint64(v, name, &value, errp);
1168 }
1169
1170 static void memory_region_get_container(Object *obj, Visitor *v,
1171 const char *name, void *opaque,
1172 Error **errp)
1173 {
1174 MemoryRegion *mr = MEMORY_REGION(obj);
1175 gchar *path = (gchar *)"";
1176
1177 if (mr->container) {
1178 path = object_get_canonical_path(OBJECT(mr->container));
1179 }
1180 visit_type_str(v, name, &path, errp);
1181 if (mr->container) {
1182 g_free(path);
1183 }
1184 }
1185
1186 static Object *memory_region_resolve_container(Object *obj, void *opaque,
1187 const char *part)
1188 {
1189 MemoryRegion *mr = MEMORY_REGION(obj);
1190
1191 return OBJECT(mr->container);
1192 }
1193
1194 static void memory_region_get_priority(Object *obj, Visitor *v,
1195 const char *name, void *opaque,
1196 Error **errp)
1197 {
1198 MemoryRegion *mr = MEMORY_REGION(obj);
1199 int32_t value = mr->priority;
1200
1201 visit_type_int32(v, name, &value, errp);
1202 }
1203
1204 static void memory_region_get_size(Object *obj, Visitor *v, const char *name,
1205 void *opaque, Error **errp)
1206 {
1207 MemoryRegion *mr = MEMORY_REGION(obj);
1208 uint64_t value = memory_region_size(mr);
1209
1210 visit_type_uint64(v, name, &value, errp);
1211 }
1212
1213 static void memory_region_initfn(Object *obj)
1214 {
1215 MemoryRegion *mr = MEMORY_REGION(obj);
1216 ObjectProperty *op;
1217
1218 mr->ops = &unassigned_mem_ops;
1219 mr->enabled = true;
1220 mr->romd_mode = true;
1221 mr->global_locking = true;
1222 mr->destructor = memory_region_destructor_none;
1223 QTAILQ_INIT(&mr->subregions);
1224 QTAILQ_INIT(&mr->coalesced);
1225
1226 op = object_property_add(OBJECT(mr), "container",
1227 "link<" TYPE_MEMORY_REGION ">",
1228 memory_region_get_container,
1229 NULL, /* memory_region_set_container */
1230 NULL, NULL, &error_abort);
1231 op->resolve = memory_region_resolve_container;
1232
1233 object_property_add(OBJECT(mr), "addr", "uint64",
1234 memory_region_get_addr,
1235 NULL, /* memory_region_set_addr */
1236 NULL, NULL, &error_abort);
1237 object_property_add(OBJECT(mr), "priority", "uint32",
1238 memory_region_get_priority,
1239 NULL, /* memory_region_set_priority */
1240 NULL, NULL, &error_abort);
1241 object_property_add(OBJECT(mr), "size", "uint64",
1242 memory_region_get_size,
1243 NULL, /* memory_region_set_size, */
1244 NULL, NULL, &error_abort);
1245 }
1246
1247 static void iommu_memory_region_initfn(Object *obj)
1248 {
1249 MemoryRegion *mr = MEMORY_REGION(obj);
1250
1251 mr->is_iommu = true;
1252 }
1253
1254 static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
1255 unsigned size)
1256 {
1257 #ifdef DEBUG_UNASSIGNED
1258 printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
1259 #endif
1260 if (current_cpu != NULL) {
1261 bool is_exec = current_cpu->mem_io_access_type == MMU_INST_FETCH;
1262 cpu_unassigned_access(current_cpu, addr, false, is_exec, 0, size);
1263 }
1264 return 0;
1265 }
1266
1267 static void unassigned_mem_write(void *opaque, hwaddr addr,
1268 uint64_t val, unsigned size)
1269 {
1270 #ifdef DEBUG_UNASSIGNED
1271 printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val);
1272 #endif
1273 if (current_cpu != NULL) {
1274 cpu_unassigned_access(current_cpu, addr, true, false, 0, size);
1275 }
1276 }
1277
1278 static bool unassigned_mem_accepts(void *opaque, hwaddr addr,
1279 unsigned size, bool is_write,
1280 MemTxAttrs attrs)
1281 {
1282 return false;
1283 }
1284
1285 const MemoryRegionOps unassigned_mem_ops = {
1286 .valid.accepts = unassigned_mem_accepts,
1287 .endianness = DEVICE_NATIVE_ENDIAN,
1288 };
1289
1290 static uint64_t memory_region_ram_device_read(void *opaque,
1291 hwaddr addr, unsigned size)
1292 {
1293 MemoryRegion *mr = opaque;
1294 uint64_t data = (uint64_t)~0;
1295
1296 switch (size) {
1297 case 1:
1298 data = *(uint8_t *)(mr->ram_block->host + addr);
1299 break;
1300 case 2:
1301 data = *(uint16_t *)(mr->ram_block->host + addr);
1302 break;
1303 case 4:
1304 data = *(uint32_t *)(mr->ram_block->host + addr);
1305 break;
1306 case 8:
1307 data = *(uint64_t *)(mr->ram_block->host + addr);
1308 break;
1309 }
1310
1311 trace_memory_region_ram_device_read(get_cpu_index(), mr, addr, data, size);
1312
1313 return data;
1314 }
1315
1316 static void memory_region_ram_device_write(void *opaque, hwaddr addr,
1317 uint64_t data, unsigned size)
1318 {
1319 MemoryRegion *mr = opaque;
1320
1321 trace_memory_region_ram_device_write(get_cpu_index(), mr, addr, data, size);
1322
1323 switch (size) {
1324 case 1:
1325 *(uint8_t *)(mr->ram_block->host + addr) = (uint8_t)data;
1326 break;
1327 case 2:
1328 *(uint16_t *)(mr->ram_block->host + addr) = (uint16_t)data;
1329 break;
1330 case 4:
1331 *(uint32_t *)(mr->ram_block->host + addr) = (uint32_t)data;
1332 break;
1333 case 8:
1334 *(uint64_t *)(mr->ram_block->host + addr) = data;
1335 break;
1336 }
1337 }
1338
1339 static const MemoryRegionOps ram_device_mem_ops = {
1340 .read = memory_region_ram_device_read,
1341 .write = memory_region_ram_device_write,
1342 .endianness = DEVICE_HOST_ENDIAN,
1343 .valid = {
1344 .min_access_size = 1,
1345 .max_access_size = 8,
1346 .unaligned = true,
1347 },
1348 .impl = {
1349 .min_access_size = 1,
1350 .max_access_size = 8,
1351 .unaligned = true,
1352 },
1353 };
1354
1355 bool memory_region_access_valid(MemoryRegion *mr,
1356 hwaddr addr,
1357 unsigned size,
1358 bool is_write,
1359 MemTxAttrs attrs)
1360 {
1361 int access_size_min, access_size_max;
1362 int access_size, i;
1363
1364 if (!mr->ops->valid.unaligned && (addr & (size - 1))) {
1365 return false;
1366 }
1367
1368 if (!mr->ops->valid.accepts) {
1369 return true;
1370 }
1371
1372 access_size_min = mr->ops->valid.min_access_size;
1373 if (!mr->ops->valid.min_access_size) {
1374 access_size_min = 1;
1375 }
1376
1377 access_size_max = mr->ops->valid.max_access_size;
1378 if (!mr->ops->valid.max_access_size) {
1379 access_size_max = 4;
1380 }
1381
1382 access_size = MAX(MIN(size, access_size_max), access_size_min);
1383 for (i = 0; i < size; i += access_size) {
1384 if (!mr->ops->valid.accepts(mr->opaque, addr + i, access_size,
1385 is_write, attrs)) {
1386 return false;
1387 }
1388 }
1389
1390 return true;
1391 }
1392
1393 static MemTxResult memory_region_dispatch_read1(MemoryRegion *mr,
1394 hwaddr addr,
1395 uint64_t *pval,
1396 unsigned size,
1397 MemTxAttrs attrs)
1398 {
1399 *pval = 0;
1400
1401 if (mr->ops->read) {
1402 return access_with_adjusted_size(addr, pval, size,
1403 mr->ops->impl.min_access_size,
1404 mr->ops->impl.max_access_size,
1405 memory_region_read_accessor,
1406 mr, attrs);
1407 } else {
1408 return access_with_adjusted_size(addr, pval, size,
1409 mr->ops->impl.min_access_size,
1410 mr->ops->impl.max_access_size,
1411 memory_region_read_with_attrs_accessor,
1412 mr, attrs);
1413 }
1414 }
1415
1416 MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
1417 hwaddr addr,
1418 uint64_t *pval,
1419 MemOp op,
1420 MemTxAttrs attrs)
1421 {
1422 unsigned size = memop_size(op);
1423 MemTxResult r;
1424
1425 if (!memory_region_access_valid(mr, addr, size, false, attrs)) {
1426 *pval = unassigned_mem_read(mr, addr, size);
1427 return MEMTX_DECODE_ERROR;
1428 }
1429
1430 r = memory_region_dispatch_read1(mr, addr, pval, size, attrs);
1431 adjust_endianness(mr, pval, op);
1432 return r;
1433 }
1434
1435 /* Return true if an eventfd was signalled */
1436 static bool memory_region_dispatch_write_eventfds(MemoryRegion *mr,
1437 hwaddr addr,
1438 uint64_t data,
1439 unsigned size,
1440 MemTxAttrs attrs)
1441 {
1442 MemoryRegionIoeventfd ioeventfd = {
1443 .addr = addrrange_make(int128_make64(addr), int128_make64(size)),
1444 .data = data,
1445 };
1446 unsigned i;
1447
1448 for (i = 0; i < mr->ioeventfd_nb; i++) {
1449 ioeventfd.match_data = mr->ioeventfds[i].match_data;
1450 ioeventfd.e = mr->ioeventfds[i].e;
1451
1452 if (memory_region_ioeventfd_equal(&ioeventfd, &mr->ioeventfds[i])) {
1453 event_notifier_set(ioeventfd.e);
1454 return true;
1455 }
1456 }
1457
1458 return false;
1459 }
1460
1461 MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
1462 hwaddr addr,
1463 uint64_t data,
1464 MemOp op,
1465 MemTxAttrs attrs)
1466 {
1467 unsigned size = memop_size(op);
1468
1469 if (!memory_region_access_valid(mr, addr, size, true, attrs)) {
1470 unassigned_mem_write(mr, addr, data, size);
1471 return MEMTX_DECODE_ERROR;
1472 }
1473
1474 adjust_endianness(mr, &data, op);
1475
1476 if ((!kvm_eventfds_enabled()) &&
1477 memory_region_dispatch_write_eventfds(mr, addr, data, size, attrs)) {
1478 return MEMTX_OK;
1479 }
1480
1481 if (mr->ops->write) {
1482 return access_with_adjusted_size(addr, &data, size,
1483 mr->ops->impl.min_access_size,
1484 mr->ops->impl.max_access_size,
1485 memory_region_write_accessor, mr,
1486 attrs);
1487 } else {
1488 return
1489 access_with_adjusted_size(addr, &data, size,
1490 mr->ops->impl.min_access_size,
1491 mr->ops->impl.max_access_size,
1492 memory_region_write_with_attrs_accessor,
1493 mr, attrs);
1494 }
1495 }
1496
1497 void memory_region_init_io(MemoryRegion *mr,
1498 Object *owner,
1499 const MemoryRegionOps *ops,
1500 void *opaque,
1501 const char *name,
1502 uint64_t size)
1503 {
1504 memory_region_init(mr, owner, name, size);
1505 mr->ops = ops ? ops : &unassigned_mem_ops;
1506 mr->opaque = opaque;
1507 mr->terminates = true;
1508 }
1509
1510 void memory_region_init_ram_nomigrate(MemoryRegion *mr,
1511 Object *owner,
1512 const char *name,
1513 uint64_t size,
1514 Error **errp)
1515 {
1516 memory_region_init_ram_shared_nomigrate(mr, owner, name, size, false, errp);
1517 }
1518
1519 void memory_region_init_ram_shared_nomigrate(MemoryRegion *mr,
1520 Object *owner,
1521 const char *name,
1522 uint64_t size,
1523 bool share,
1524 Error **errp)
1525 {
1526 Error *err = NULL;
1527 memory_region_init(mr, owner, name, size);
1528 mr->ram = true;
1529 mr->terminates = true;
1530 mr->destructor = memory_region_destructor_ram;
1531 mr->ram_block = qemu_ram_alloc(size, share, mr, &err);
1532 mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
1533 if (err) {
1534 mr->size = int128_zero();
1535 object_unparent(OBJECT(mr));
1536 error_propagate(errp, err);
1537 }
1538 }
1539
1540 void memory_region_init_resizeable_ram(MemoryRegion *mr,
1541 Object *owner,
1542 const char *name,
1543 uint64_t size,
1544 uint64_t max_size,
1545 void (*resized)(const char*,
1546 uint64_t length,
1547 void *host),
1548 Error **errp)
1549 {
1550 Error *err = NULL;
1551 memory_region_init(mr, owner, name, size);
1552 mr->ram = true;
1553 mr->terminates = true;
1554 mr->destructor = memory_region_destructor_ram;
1555 mr->ram_block = qemu_ram_alloc_resizeable(size, max_size, resized,
1556 mr, &err);
1557 mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
1558 if (err) {
1559 mr->size = int128_zero();
1560 object_unparent(OBJECT(mr));
1561 error_propagate(errp, err);
1562 }
1563 }
1564
1565 #ifdef CONFIG_POSIX
1566 void memory_region_init_ram_from_file(MemoryRegion *mr,
1567 struct Object *owner,
1568 const char *name,
1569 uint64_t size,
1570 uint64_t align,
1571 uint32_t ram_flags,
1572 const char *path,
1573 Error **errp)
1574 {
1575 Error *err = NULL;
1576 memory_region_init(mr, owner, name, size);
1577 mr->ram = true;
1578 mr->terminates = true;
1579 mr->destructor = memory_region_destructor_ram;
1580 mr->align = align;
1581 mr->ram_block = qemu_ram_alloc_from_file(size, mr, ram_flags, path, &err);
1582 mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
1583 if (err) {
1584 mr->size = int128_zero();
1585 object_unparent(OBJECT(mr));
1586 error_propagate(errp, err);
1587 }
1588 }
1589
1590 void memory_region_init_ram_from_fd(MemoryRegion *mr,
1591 struct Object *owner,
1592 const char *name,
1593 uint64_t size,
1594 bool share,
1595 int fd,
1596 Error **errp)
1597 {
1598 Error *err = NULL;
1599 memory_region_init(mr, owner, name, size);
1600 mr->ram = true;
1601 mr->terminates = true;
1602 mr->destructor = memory_region_destructor_ram;
1603 mr->ram_block = qemu_ram_alloc_from_fd(size, mr,
1604 share ? RAM_SHARED : 0,
1605 fd, &err);
1606 mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
1607 if (err) {
1608 mr->size = int128_zero();
1609 object_unparent(OBJECT(mr));
1610 error_propagate(errp, err);
1611 }
1612 }
1613 #endif
1614
1615 void memory_region_init_ram_ptr(MemoryRegion *mr,
1616 Object *owner,
1617 const char *name,
1618 uint64_t size,
1619 void *ptr)
1620 {
1621 memory_region_init(mr, owner, name, size);
1622 mr->ram = true;
1623 mr->terminates = true;
1624 mr->destructor = memory_region_destructor_ram;
1625 mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
1626
1627 /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
1628 assert(ptr != NULL);
1629 mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal);
1630 }
1631
1632 void memory_region_init_ram_device_ptr(MemoryRegion *mr,
1633 Object *owner,
1634 const char *name,
1635 uint64_t size,
1636 void *ptr)
1637 {
1638 memory_region_init(mr, owner, name, size);
1639 mr->ram = true;
1640 mr->terminates = true;
1641 mr->ram_device = true;
1642 mr->ops = &ram_device_mem_ops;
1643 mr->opaque = mr;
1644 mr->destructor = memory_region_destructor_ram;
1645 mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
1646 /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
1647 assert(ptr != NULL);
1648 mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal);
1649 }
1650
1651 void memory_region_init_alias(MemoryRegion *mr,
1652 Object *owner,
1653 const char *name,
1654 MemoryRegion *orig,
1655 hwaddr offset,
1656 uint64_t size)
1657 {
1658 memory_region_init(mr, owner, name, size);
1659 mr->alias = orig;
1660 mr->alias_offset = offset;
1661 }
1662
1663 void memory_region_init_rom_nomigrate(MemoryRegion *mr,
1664 struct Object *owner,
1665 const char *name,
1666 uint64_t size,
1667 Error **errp)
1668 {
1669 Error *err = NULL;
1670 memory_region_init(mr, owner, name, size);
1671 mr->ram = true;
1672 mr->readonly = true;
1673 mr->terminates = true;
1674 mr->destructor = memory_region_destructor_ram;
1675 mr->ram_block = qemu_ram_alloc(size, false, mr, &err);
1676 mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
1677 if (err) {
1678 mr->size = int128_zero();
1679 object_unparent(OBJECT(mr));
1680 error_propagate(errp, err);
1681 }
1682 }
1683
1684 void memory_region_init_rom_device_nomigrate(MemoryRegion *mr,
1685 Object *owner,
1686 const MemoryRegionOps *ops,
1687 void *opaque,
1688 const char *name,
1689 uint64_t size,
1690 Error **errp)
1691 {
1692 Error *err = NULL;
1693 assert(ops);
1694 memory_region_init(mr, owner, name, size);
1695 mr->ops = ops;
1696 mr->opaque = opaque;
1697 mr->terminates = true;
1698 mr->rom_device = true;
1699 mr->destructor = memory_region_destructor_ram;
1700 mr->ram_block = qemu_ram_alloc(size, false, mr, &err);
1701 if (err) {
1702 mr->size = int128_zero();
1703 object_unparent(OBJECT(mr));
1704 error_propagate(errp, err);
1705 }
1706 }
1707
1708 void memory_region_init_iommu(void *_iommu_mr,
1709 size_t instance_size,
1710 const char *mrtypename,
1711 Object *owner,
1712 const char *name,
1713 uint64_t size)
1714 {
1715 struct IOMMUMemoryRegion *iommu_mr;
1716 struct MemoryRegion *mr;
1717
1718 object_initialize(_iommu_mr, instance_size, mrtypename);
1719 mr = MEMORY_REGION(_iommu_mr);
1720 memory_region_do_init(mr, owner, name, size);
1721 iommu_mr = IOMMU_MEMORY_REGION(mr);
1722 mr->terminates = true; /* then re-forwards */
1723 QLIST_INIT(&iommu_mr->iommu_notify);
1724 iommu_mr->iommu_notify_flags = IOMMU_NOTIFIER_NONE;
1725 }
1726
1727 static void memory_region_finalize(Object *obj)
1728 {
1729 MemoryRegion *mr = MEMORY_REGION(obj);
1730
1731 assert(!mr->container);
1732
1733 /* We know the region is not visible in any address space (it
1734 * does not have a container and cannot be a root either because
1735 * it has no references, so we can blindly clear mr->enabled.
1736 * memory_region_set_enabled instead could trigger a transaction
1737 * and cause an infinite loop.
1738 */
1739 mr->enabled = false;
1740 memory_region_transaction_begin();
1741 while (!QTAILQ_EMPTY(&mr->subregions)) {
1742 MemoryRegion *subregion = QTAILQ_FIRST(&mr->subregions);
1743 memory_region_del_subregion(mr, subregion);
1744 }
1745 memory_region_transaction_commit();
1746
1747 mr->destructor(mr);
1748 memory_region_clear_coalescing(mr);
1749 g_free((char *)mr->name);
1750 g_free(mr->ioeventfds);
1751 }
1752
1753 Object *memory_region_owner(MemoryRegion *mr)
1754 {
1755 Object *obj = OBJECT(mr);
1756 return obj->parent;
1757 }
1758
1759 void memory_region_ref(MemoryRegion *mr)
1760 {
1761 /* MMIO callbacks most likely will access data that belongs
1762 * to the owner, hence the need to ref/unref the owner whenever
1763 * the memory region is in use.
1764 *
1765 * The memory region is a child of its owner. As long as the
1766 * owner doesn't call unparent itself on the memory region,
1767 * ref-ing the owner will also keep the memory region alive.
1768 * Memory regions without an owner are supposed to never go away;
1769 * we do not ref/unref them because it slows down DMA sensibly.
1770 */
1771 if (mr && mr->owner) {
1772 object_ref(mr->owner);
1773 }
1774 }
1775
1776 void memory_region_unref(MemoryRegion *mr)
1777 {
1778 if (mr && mr->owner) {
1779 object_unref(mr->owner);
1780 }
1781 }
1782
1783 uint64_t memory_region_size(MemoryRegion *mr)
1784 {
1785 if (int128_eq(mr->size, int128_2_64())) {
1786 return UINT64_MAX;
1787 }
1788 return int128_get64(mr->size);
1789 }
1790
1791 const char *memory_region_name(const MemoryRegion *mr)
1792 {
1793 if (!mr->name) {
1794 ((MemoryRegion *)mr)->name =
1795 object_get_canonical_path_component(OBJECT(mr));
1796 }
1797 return mr->name;
1798 }
1799
1800 bool memory_region_is_ram_device(MemoryRegion *mr)
1801 {
1802 return mr->ram_device;
1803 }
1804
1805 uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr)
1806 {
1807 uint8_t mask = mr->dirty_log_mask;
1808 if (global_dirty_log && mr->ram_block) {
1809 mask |= (1 << DIRTY_MEMORY_MIGRATION);
1810 }
1811 return mask;
1812 }
1813
1814 bool memory_region_is_logging(MemoryRegion *mr, uint8_t client)
1815 {
1816 return memory_region_get_dirty_log_mask(mr) & (1 << client);
1817 }
1818
1819 static int memory_region_update_iommu_notify_flags(IOMMUMemoryRegion *iommu_mr,
1820 Error **errp)
1821 {
1822 IOMMUNotifierFlag flags = IOMMU_NOTIFIER_NONE;
1823 IOMMUNotifier *iommu_notifier;
1824 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
1825 int ret = 0;
1826
1827 IOMMU_NOTIFIER_FOREACH(iommu_notifier, iommu_mr) {
1828 flags |= iommu_notifier->notifier_flags;
1829 }
1830
1831 if (flags != iommu_mr->iommu_notify_flags && imrc->notify_flag_changed) {
1832 ret = imrc->notify_flag_changed(iommu_mr,
1833 iommu_mr->iommu_notify_flags,
1834 flags, errp);
1835 }
1836
1837 if (!ret) {
1838 iommu_mr->iommu_notify_flags = flags;
1839 }
1840 return ret;
1841 }
1842
1843 int memory_region_register_iommu_notifier(MemoryRegion *mr,
1844 IOMMUNotifier *n, Error **errp)
1845 {
1846 IOMMUMemoryRegion *iommu_mr;
1847 int ret;
1848
1849 if (mr->alias) {
1850 return memory_region_register_iommu_notifier(mr->alias, n, errp);
1851 }
1852
1853 /* We need to register for at least one bitfield */
1854 iommu_mr = IOMMU_MEMORY_REGION(mr);
1855 assert(n->notifier_flags != IOMMU_NOTIFIER_NONE);
1856 assert(n->start <= n->end);
1857 assert(n->iommu_idx >= 0 &&
1858 n->iommu_idx < memory_region_iommu_num_indexes(iommu_mr));
1859
1860 QLIST_INSERT_HEAD(&iommu_mr->iommu_notify, n, node);
1861 ret = memory_region_update_iommu_notify_flags(iommu_mr, errp);
1862 if (ret) {
1863 QLIST_REMOVE(n, node);
1864 }
1865 return ret;
1866 }
1867
1868 uint64_t memory_region_iommu_get_min_page_size(IOMMUMemoryRegion *iommu_mr)
1869 {
1870 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
1871
1872 if (imrc->get_min_page_size) {
1873 return imrc->get_min_page_size(iommu_mr);
1874 }
1875 return TARGET_PAGE_SIZE;
1876 }
1877
1878 void memory_region_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n)
1879 {
1880 MemoryRegion *mr = MEMORY_REGION(iommu_mr);
1881 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
1882 hwaddr addr, granularity;
1883 IOMMUTLBEntry iotlb;
1884
1885 /* If the IOMMU has its own replay callback, override */
1886 if (imrc->replay) {
1887 imrc->replay(iommu_mr, n);
1888 return;
1889 }
1890
1891 granularity = memory_region_iommu_get_min_page_size(iommu_mr);
1892
1893 for (addr = 0; addr < memory_region_size(mr); addr += granularity) {
1894 iotlb = imrc->translate(iommu_mr, addr, IOMMU_NONE, n->iommu_idx);
1895 if (iotlb.perm != IOMMU_NONE) {
1896 n->notify(n, &iotlb);
1897 }
1898
1899 /* if (2^64 - MR size) < granularity, it's possible to get an
1900 * infinite loop here. This should catch such a wraparound */
1901 if ((addr + granularity) < addr) {
1902 break;
1903 }
1904 }
1905 }
1906
1907 void memory_region_unregister_iommu_notifier(MemoryRegion *mr,
1908 IOMMUNotifier *n)
1909 {
1910 IOMMUMemoryRegion *iommu_mr;
1911
1912 if (mr->alias) {
1913 memory_region_unregister_iommu_notifier(mr->alias, n);
1914 return;
1915 }
1916 QLIST_REMOVE(n, node);
1917 iommu_mr = IOMMU_MEMORY_REGION(mr);
1918 memory_region_update_iommu_notify_flags(iommu_mr, NULL);
1919 }
1920
1921 void memory_region_notify_one(IOMMUNotifier *notifier,
1922 IOMMUTLBEntry *entry)
1923 {
1924 IOMMUNotifierFlag request_flags;
1925 hwaddr entry_end = entry->iova + entry->addr_mask;
1926
1927 /*
1928 * Skip the notification if the notification does not overlap
1929 * with registered range.
1930 */
1931 if (notifier->start > entry_end || notifier->end < entry->iova) {
1932 return;
1933 }
1934
1935 assert(entry->iova >= notifier->start && entry_end <= notifier->end);
1936
1937 if (entry->perm & IOMMU_RW) {
1938 request_flags = IOMMU_NOTIFIER_MAP;
1939 } else {
1940 request_flags = IOMMU_NOTIFIER_UNMAP;
1941 }
1942
1943 if (notifier->notifier_flags & request_flags) {
1944 notifier->notify(notifier, entry);
1945 }
1946 }
1947
1948 void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr,
1949 int iommu_idx,
1950 IOMMUTLBEntry entry)
1951 {
1952 IOMMUNotifier *iommu_notifier;
1953
1954 assert(memory_region_is_iommu(MEMORY_REGION(iommu_mr)));
1955
1956 IOMMU_NOTIFIER_FOREACH(iommu_notifier, iommu_mr) {
1957 if (iommu_notifier->iommu_idx == iommu_idx) {
1958 memory_region_notify_one(iommu_notifier, &entry);
1959 }
1960 }
1961 }
1962
1963 int memory_region_iommu_get_attr(IOMMUMemoryRegion *iommu_mr,
1964 enum IOMMUMemoryRegionAttr attr,
1965 void *data)
1966 {
1967 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
1968
1969 if (!imrc->get_attr) {
1970 return -EINVAL;
1971 }
1972
1973 return imrc->get_attr(iommu_mr, attr, data);
1974 }
1975
1976 int memory_region_iommu_attrs_to_index(IOMMUMemoryRegion *iommu_mr,
1977 MemTxAttrs attrs)
1978 {
1979 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
1980
1981 if (!imrc->attrs_to_index) {
1982 return 0;
1983 }
1984
1985 return imrc->attrs_to_index(iommu_mr, attrs);
1986 }
1987
1988 int memory_region_iommu_num_indexes(IOMMUMemoryRegion *iommu_mr)
1989 {
1990 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
1991
1992 if (!imrc->num_indexes) {
1993 return 1;
1994 }
1995
1996 return imrc->num_indexes(iommu_mr);
1997 }
1998
1999 void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
2000 {
2001 uint8_t mask = 1 << client;
2002 uint8_t old_logging;
2003
2004 assert(client == DIRTY_MEMORY_VGA);
2005 old_logging = mr->vga_logging_count;
2006 mr->vga_logging_count += log ? 1 : -1;
2007 if (!!old_logging == !!mr->vga_logging_count) {
2008 return;
2009 }
2010
2011 memory_region_transaction_begin();
2012 mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask);
2013 memory_region_update_pending |= mr->enabled;
2014 memory_region_transaction_commit();
2015 }
2016
2017 void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
2018 hwaddr size)
2019 {
2020 assert(mr->ram_block);
2021 cpu_physical_memory_set_dirty_range(memory_region_get_ram_addr(mr) + addr,
2022 size,
2023 memory_region_get_dirty_log_mask(mr));
2024 }
2025
2026 static void memory_region_sync_dirty_bitmap(MemoryRegion *mr)
2027 {
2028 MemoryListener *listener;
2029 AddressSpace *as;
2030 FlatView *view;
2031 FlatRange *fr;
2032
2033 /* If the same address space has multiple log_sync listeners, we
2034 * visit that address space's FlatView multiple times. But because
2035 * log_sync listeners are rare, it's still cheaper than walking each
2036 * address space once.
2037 */
2038 QTAILQ_FOREACH(listener, &memory_listeners, link) {
2039 if (!listener->log_sync) {
2040 continue;
2041 }
2042 as = listener->address_space;
2043 view = address_space_get_flatview(as);
2044 FOR_EACH_FLAT_RANGE(fr, view) {
2045 if (fr->dirty_log_mask && (!mr || fr->mr == mr)) {
2046 MemoryRegionSection mrs = section_from_flat_range(fr, view);
2047 listener->log_sync(listener, &mrs);
2048 }
2049 }
2050 flatview_unref(view);
2051 }
2052 }
2053
2054 void memory_region_clear_dirty_bitmap(MemoryRegion *mr, hwaddr start,
2055 hwaddr len)
2056 {
2057 MemoryRegionSection mrs;
2058 MemoryListener *listener;
2059 AddressSpace *as;
2060 FlatView *view;
2061 FlatRange *fr;
2062 hwaddr sec_start, sec_end, sec_size;
2063
2064 QTAILQ_FOREACH(listener, &memory_listeners, link) {
2065 if (!listener->log_clear) {
2066 continue;
2067 }
2068 as = listener->address_space;
2069 view = address_space_get_flatview(as);
2070 FOR_EACH_FLAT_RANGE(fr, view) {
2071 if (!fr->dirty_log_mask || fr->mr != mr) {
2072 /*
2073 * Clear dirty bitmap operation only applies to those
2074 * regions whose dirty logging is at least enabled
2075 */
2076 continue;
2077 }
2078
2079 mrs = section_from_flat_range(fr, view);
2080
2081 sec_start = MAX(mrs.offset_within_region, start);
2082 sec_end = mrs.offset_within_region + int128_get64(mrs.size);
2083 sec_end = MIN(sec_end, start + len);
2084
2085 if (sec_start >= sec_end) {
2086 /*
2087 * If this memory region section has no intersection
2088 * with the requested range, skip.
2089 */
2090 continue;
2091 }
2092
2093 /* Valid case; shrink the section if needed */
2094 mrs.offset_within_address_space +=
2095 sec_start - mrs.offset_within_region;
2096 mrs.offset_within_region = sec_start;
2097 sec_size = sec_end - sec_start;
2098 mrs.size = int128_make64(sec_size);
2099 listener->log_clear(listener, &mrs);
2100 }
2101 flatview_unref(view);
2102 }
2103 }
2104
2105 DirtyBitmapSnapshot *memory_region_snapshot_and_clear_dirty(MemoryRegion *mr,
2106 hwaddr addr,
2107 hwaddr size,
2108 unsigned client)
2109 {
2110 DirtyBitmapSnapshot *snapshot;
2111 assert(mr->ram_block);
2112 memory_region_sync_dirty_bitmap(mr);
2113 snapshot = cpu_physical_memory_snapshot_and_clear_dirty(mr, addr, size, client);
2114 memory_global_after_dirty_log_sync();
2115 return snapshot;
2116 }
2117
2118 bool memory_region_snapshot_get_dirty(MemoryRegion *mr, DirtyBitmapSnapshot *snap,
2119 hwaddr addr, hwaddr size)
2120 {
2121 assert(mr->ram_block);
2122 return cpu_physical_memory_snapshot_get_dirty(snap,
2123 memory_region_get_ram_addr(mr) + addr, size);
2124 }
2125
2126 void memory_region_set_readonly(MemoryRegion *mr, bool readonly)
2127 {
2128 if (mr->readonly != readonly) {
2129 memory_region_transaction_begin();
2130 mr->readonly = readonly;
2131 memory_region_update_pending |= mr->enabled;
2132 memory_region_transaction_commit();
2133 }
2134 }
2135
2136 void memory_region_set_nonvolatile(MemoryRegion *mr, bool nonvolatile)
2137 {
2138 if (mr->nonvolatile != nonvolatile) {
2139 memory_region_transaction_begin();
2140 mr->nonvolatile = nonvolatile;
2141 memory_region_update_pending |= mr->enabled;
2142 memory_region_transaction_commit();
2143 }
2144 }
2145
2146 void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode)
2147 {
2148 if (mr->romd_mode != romd_mode) {
2149 memory_region_transaction_begin();
2150 mr->romd_mode = romd_mode;
2151 memory_region_update_pending |= mr->enabled;
2152 memory_region_transaction_commit();
2153 }
2154 }
2155
2156 void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
2157 hwaddr size, unsigned client)
2158 {
2159 assert(mr->ram_block);
2160 cpu_physical_memory_test_and_clear_dirty(
2161 memory_region_get_ram_addr(mr) + addr, size, client);
2162 }
2163
2164 int memory_region_get_fd(MemoryRegion *mr)
2165 {
2166 int fd;
2167
2168 RCU_READ_LOCK_GUARD();
2169 while (mr->alias) {
2170 mr = mr->alias;
2171 }
2172 fd = mr->ram_block->fd;
2173
2174 return fd;
2175 }
2176
2177 void *memory_region_get_ram_ptr(MemoryRegion *mr)
2178 {
2179 void *ptr;
2180 uint64_t offset = 0;
2181
2182 RCU_READ_LOCK_GUARD();
2183 while (mr->alias) {
2184 offset += mr->alias_offset;
2185 mr = mr->alias;
2186 }
2187 assert(mr->ram_block);
2188 ptr = qemu_map_ram_ptr(mr->ram_block, offset);
2189
2190 return ptr;
2191 }
2192
2193 MemoryRegion *memory_region_from_host(void *ptr, ram_addr_t *offset)
2194 {
2195 RAMBlock *block;
2196
2197 block = qemu_ram_block_from_host(ptr, false, offset);
2198 if (!block) {
2199 return NULL;
2200 }
2201
2202 return block->mr;
2203 }
2204
2205 ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr)
2206 {
2207 return mr->ram_block ? mr->ram_block->offset : RAM_ADDR_INVALID;
2208 }
2209
2210 void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, Error **errp)
2211 {
2212 assert(mr->ram_block);
2213
2214 qemu_ram_resize(mr->ram_block, newsize, errp);
2215 }
2216
2217 /*
2218 * Call proper memory listeners about the change on the newly
2219 * added/removed CoalescedMemoryRange.
2220 */
2221 static void memory_region_update_coalesced_range(MemoryRegion *mr,
2222 CoalescedMemoryRange *cmr,
2223 bool add)
2224 {
2225 AddressSpace *as;
2226 FlatView *view;
2227 FlatRange *fr;
2228
2229 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
2230 view = address_space_get_flatview(as);
2231 FOR_EACH_FLAT_RANGE(fr, view) {
2232 if (fr->mr == mr) {
2233 flat_range_coalesced_io_notify(fr, as, cmr, add);
2234 }
2235 }
2236 flatview_unref(view);
2237 }
2238 }
2239
2240 void memory_region_set_coalescing(MemoryRegion *mr)
2241 {
2242 memory_region_clear_coalescing(mr);
2243 memory_region_add_coalescing(mr, 0, int128_get64(mr->size));
2244 }
2245
2246 void memory_region_add_coalescing(MemoryRegion *mr,
2247 hwaddr offset,
2248 uint64_t size)
2249 {
2250 CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr));
2251
2252 cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size));
2253 QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link);
2254 memory_region_update_coalesced_range(mr, cmr, true);
2255 memory_region_set_flush_coalesced(mr);
2256 }
2257
2258 void memory_region_clear_coalescing(MemoryRegion *mr)
2259 {
2260 CoalescedMemoryRange *cmr;
2261
2262 if (QTAILQ_EMPTY(&mr->coalesced)) {
2263 return;
2264 }
2265
2266 qemu_flush_coalesced_mmio_buffer();
2267 mr->flush_coalesced_mmio = false;
2268
2269 while (!QTAILQ_EMPTY(&mr->coalesced)) {
2270 cmr = QTAILQ_FIRST(&mr->coalesced);
2271 QTAILQ_REMOVE(&mr->coalesced, cmr, link);
2272 memory_region_update_coalesced_range(mr, cmr, false);
2273 g_free(cmr);
2274 }
2275 }
2276
2277 void memory_region_set_flush_coalesced(MemoryRegion *mr)
2278 {
2279 mr->flush_coalesced_mmio = true;
2280 }
2281
2282 void memory_region_clear_flush_coalesced(MemoryRegion *mr)
2283 {
2284 qemu_flush_coalesced_mmio_buffer();
2285 if (QTAILQ_EMPTY(&mr->coalesced)) {
2286 mr->flush_coalesced_mmio = false;
2287 }
2288 }
2289
2290 void memory_region_clear_global_locking(MemoryRegion *mr)
2291 {
2292 mr->global_locking = false;
2293 }
2294
2295 static bool userspace_eventfd_warning;
2296
2297 void memory_region_add_eventfd(MemoryRegion *mr,
2298 hwaddr addr,
2299 unsigned size,
2300 bool match_data,
2301 uint64_t data,
2302 EventNotifier *e)
2303 {
2304 MemoryRegionIoeventfd mrfd = {
2305 .addr.start = int128_make64(addr),
2306 .addr.size = int128_make64(size),
2307 .match_data = match_data,
2308 .data = data,
2309 .e = e,
2310 };
2311 unsigned i;
2312
2313 if (kvm_enabled() && (!(kvm_eventfds_enabled() ||
2314 userspace_eventfd_warning))) {
2315 userspace_eventfd_warning = true;
2316 error_report("Using eventfd without MMIO binding in KVM. "
2317 "Suboptimal performance expected");
2318 }
2319
2320 if (size) {
2321 adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE);
2322 }
2323 memory_region_transaction_begin();
2324 for (i = 0; i < mr->ioeventfd_nb; ++i) {
2325 if (memory_region_ioeventfd_before(&mrfd, &mr->ioeventfds[i])) {
2326 break;
2327 }
2328 }
2329 ++mr->ioeventfd_nb;
2330 mr->ioeventfds = g_realloc(mr->ioeventfds,
2331 sizeof(*mr->ioeventfds) * mr->ioeventfd_nb);
2332 memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i],
2333 sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i));
2334 mr->ioeventfds[i] = mrfd;
2335 ioeventfd_update_pending |= mr->enabled;
2336 memory_region_transaction_commit();
2337 }
2338
2339 void memory_region_del_eventfd(MemoryRegion *mr,
2340 hwaddr addr,
2341 unsigned size,
2342 bool match_data,
2343 uint64_t data,
2344 EventNotifier *e)
2345 {
2346 MemoryRegionIoeventfd mrfd = {
2347 .addr.start = int128_make64(addr),
2348 .addr.size = int128_make64(size),
2349 .match_data = match_data,
2350 .data = data,
2351 .e = e,
2352 };
2353 unsigned i;
2354
2355 if (size) {
2356 adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE);
2357 }
2358 memory_region_transaction_begin();
2359 for (i = 0; i < mr->ioeventfd_nb; ++i) {
2360 if (memory_region_ioeventfd_equal(&mrfd, &mr->ioeventfds[i])) {
2361 break;
2362 }
2363 }
2364 assert(i != mr->ioeventfd_nb);
2365 memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1],
2366 sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1)));
2367 --mr->ioeventfd_nb;
2368 mr->ioeventfds = g_realloc(mr->ioeventfds,
2369 sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1);
2370 ioeventfd_update_pending |= mr->enabled;
2371 memory_region_transaction_commit();
2372 }
2373
2374 static void memory_region_update_container_subregions(MemoryRegion *subregion)
2375 {
2376 MemoryRegion *mr = subregion->container;
2377 MemoryRegion *other;
2378
2379 memory_region_transaction_begin();
2380
2381 memory_region_ref(subregion);
2382 QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
2383 if (subregion->priority >= other->priority) {
2384 QTAILQ_INSERT_BEFORE(other, subregion, subregions_link);
2385 goto done;
2386 }
2387 }
2388 QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link);
2389 done:
2390 memory_region_update_pending |= mr->enabled && subregion->enabled;
2391 memory_region_transaction_commit();
2392 }
2393
2394 static void memory_region_add_subregion_common(MemoryRegion *mr,
2395 hwaddr offset,
2396 MemoryRegion *subregion)
2397 {
2398 assert(!subregion->container);
2399 subregion->container = mr;
2400 subregion->addr = offset;
2401 memory_region_update_container_subregions(subregion);
2402 }
2403
2404 void memory_region_add_subregion(MemoryRegion *mr,
2405 hwaddr offset,
2406 MemoryRegion *subregion)
2407 {
2408 subregion->priority = 0;
2409 memory_region_add_subregion_common(mr, offset, subregion);
2410 }
2411
2412 void memory_region_add_subregion_overlap(MemoryRegion *mr,
2413 hwaddr offset,
2414 MemoryRegion *subregion,
2415 int priority)
2416 {
2417 subregion->priority = priority;
2418 memory_region_add_subregion_common(mr, offset, subregion);
2419 }
2420
2421 void memory_region_del_subregion(MemoryRegion *mr,
2422 MemoryRegion *subregion)
2423 {
2424 memory_region_transaction_begin();
2425 assert(subregion->container == mr);
2426 subregion->container = NULL;
2427 QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link);
2428 memory_region_unref(subregion);
2429 memory_region_update_pending |= mr->enabled && subregion->enabled;
2430 memory_region_transaction_commit();
2431 }
2432
2433 void memory_region_set_enabled(MemoryRegion *mr, bool enabled)
2434 {
2435 if (enabled == mr->enabled) {
2436 return;
2437 }
2438 memory_region_transaction_begin();
2439 mr->enabled = enabled;
2440 memory_region_update_pending = true;
2441 memory_region_transaction_commit();
2442 }
2443
2444 void memory_region_set_size(MemoryRegion *mr, uint64_t size)
2445 {
2446 Int128 s = int128_make64(size);
2447
2448 if (size == UINT64_MAX) {
2449 s = int128_2_64();
2450 }
2451 if (int128_eq(s, mr->size)) {
2452 return;
2453 }
2454 memory_region_transaction_begin();
2455 mr->size = s;
2456 memory_region_update_pending = true;
2457 memory_region_transaction_commit();
2458 }
2459
2460 static void memory_region_readd_subregion(MemoryRegion *mr)
2461 {
2462 MemoryRegion *container = mr->container;
2463
2464 if (container) {
2465 memory_region_transaction_begin();
2466 memory_region_ref(mr);
2467 memory_region_del_subregion(container, mr);
2468 mr->container = container;
2469 memory_region_update_container_subregions(mr);
2470 memory_region_unref(mr);
2471 memory_region_transaction_commit();
2472 }
2473 }
2474
2475 void memory_region_set_address(MemoryRegion *mr, hwaddr addr)
2476 {
2477 if (addr != mr->addr) {
2478 mr->addr = addr;
2479 memory_region_readd_subregion(mr);
2480 }
2481 }
2482
2483 void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset)
2484 {
2485 assert(mr->alias);
2486
2487 if (offset == mr->alias_offset) {
2488 return;
2489 }
2490
2491 memory_region_transaction_begin();
2492 mr->alias_offset = offset;
2493 memory_region_update_pending |= mr->enabled;
2494 memory_region_transaction_commit();
2495 }
2496
2497 uint64_t memory_region_get_alignment(const MemoryRegion *mr)
2498 {
2499 return mr->align;
2500 }
2501
2502 static int cmp_flatrange_addr(const void *addr_, const void *fr_)
2503 {
2504 const AddrRange *addr = addr_;
2505 const FlatRange *fr = fr_;
2506
2507 if (int128_le(addrrange_end(*addr), fr->addr.start)) {
2508 return -1;
2509 } else if (int128_ge(addr->start, addrrange_end(fr->addr))) {
2510 return 1;
2511 }
2512 return 0;
2513 }
2514
2515 static FlatRange *flatview_lookup(FlatView *view, AddrRange addr)
2516 {
2517 return bsearch(&addr, view->ranges, view->nr,
2518 sizeof(FlatRange), cmp_flatrange_addr);
2519 }
2520
2521 bool memory_region_is_mapped(MemoryRegion *mr)
2522 {
2523 return mr->container ? true : false;
2524 }
2525
2526 /* Same as memory_region_find, but it does not add a reference to the
2527 * returned region. It must be called from an RCU critical section.
2528 */
2529 static MemoryRegionSection memory_region_find_rcu(MemoryRegion *mr,
2530 hwaddr addr, uint64_t size)
2531 {
2532 MemoryRegionSection ret = { .mr = NULL };
2533 MemoryRegion *root;
2534 AddressSpace *as;
2535 AddrRange range;
2536 FlatView *view;
2537 FlatRange *fr;
2538
2539 addr += mr->addr;
2540 for (root = mr; root->container; ) {
2541 root = root->container;
2542 addr += root->addr;
2543 }
2544
2545 as = memory_region_to_address_space(root);
2546 if (!as) {
2547 return ret;
2548 }
2549 range = addrrange_make(int128_make64(addr), int128_make64(size));
2550
2551 view = address_space_to_flatview(as);
2552 fr = flatview_lookup(view, range);
2553 if (!fr) {
2554 return ret;
2555 }
2556
2557 while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) {
2558 --fr;
2559 }
2560
2561 ret.mr = fr->mr;
2562 ret.fv = view;
2563 range = addrrange_intersection(range, fr->addr);
2564 ret.offset_within_region = fr->offset_in_region;
2565 ret.offset_within_region += int128_get64(int128_sub(range.start,
2566 fr->addr.start));
2567 ret.size = range.size;
2568 ret.offset_within_address_space = int128_get64(range.start);
2569 ret.readonly = fr->readonly;
2570 ret.nonvolatile = fr->nonvolatile;
2571 return ret;
2572 }
2573
2574 MemoryRegionSection memory_region_find(MemoryRegion *mr,
2575 hwaddr addr, uint64_t size)
2576 {
2577 MemoryRegionSection ret;
2578 RCU_READ_LOCK_GUARD();
2579 ret = memory_region_find_rcu(mr, addr, size);
2580 if (ret.mr) {
2581 memory_region_ref(ret.mr);
2582 }
2583 return ret;
2584 }
2585
2586 bool memory_region_present(MemoryRegion *container, hwaddr addr)
2587 {
2588 MemoryRegion *mr;
2589
2590 RCU_READ_LOCK_GUARD();
2591 mr = memory_region_find_rcu(container, addr, 1).mr;
2592 return mr && mr != container;
2593 }
2594
2595 void memory_global_dirty_log_sync(void)
2596 {
2597 memory_region_sync_dirty_bitmap(NULL);
2598 }
2599
2600 void memory_global_after_dirty_log_sync(void)
2601 {
2602 MEMORY_LISTENER_CALL_GLOBAL(log_global_after_sync, Forward);
2603 }
2604
2605 static VMChangeStateEntry *vmstate_change;
2606
2607 void memory_global_dirty_log_start(void)
2608 {
2609 if (vmstate_change) {
2610 qemu_del_vm_change_state_handler(vmstate_change);
2611 vmstate_change = NULL;
2612 }
2613
2614 global_dirty_log = true;
2615
2616 MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward);
2617
2618 /* Refresh DIRTY_MEMORY_MIGRATION bit. */
2619 memory_region_transaction_begin();
2620 memory_region_update_pending = true;
2621 memory_region_transaction_commit();
2622 }
2623
2624 static void memory_global_dirty_log_do_stop(void)
2625 {
2626 global_dirty_log = false;
2627
2628 /* Refresh DIRTY_MEMORY_MIGRATION bit. */
2629 memory_region_transaction_begin();
2630 memory_region_update_pending = true;
2631 memory_region_transaction_commit();
2632
2633 MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse);
2634 }
2635
2636 static void memory_vm_change_state_handler(void *opaque, int running,
2637 RunState state)
2638 {
2639 if (running) {
2640 memory_global_dirty_log_do_stop();
2641
2642 if (vmstate_change) {
2643 qemu_del_vm_change_state_handler(vmstate_change);
2644 vmstate_change = NULL;
2645 }
2646 }
2647 }
2648
2649 void memory_global_dirty_log_stop(void)
2650 {
2651 if (!runstate_is_running()) {
2652 if (vmstate_change) {
2653 return;
2654 }
2655 vmstate_change = qemu_add_vm_change_state_handler(
2656 memory_vm_change_state_handler, NULL);
2657 return;
2658 }
2659
2660 memory_global_dirty_log_do_stop();
2661 }
2662
2663 static void listener_add_address_space(MemoryListener *listener,
2664 AddressSpace *as)
2665 {
2666 FlatView *view;
2667 FlatRange *fr;
2668
2669 if (listener->begin) {
2670 listener->begin(listener);
2671 }
2672 if (global_dirty_log) {
2673 if (listener->log_global_start) {
2674 listener->log_global_start(listener);
2675 }
2676 }
2677
2678 view = address_space_get_flatview(as);
2679 FOR_EACH_FLAT_RANGE(fr, view) {
2680 MemoryRegionSection section = section_from_flat_range(fr, view);
2681
2682 if (listener->region_add) {
2683 listener->region_add(listener, &section);
2684 }
2685 if (fr->dirty_log_mask && listener->log_start) {
2686 listener->log_start(listener, &section, 0, fr->dirty_log_mask);
2687 }
2688 }
2689 if (listener->commit) {
2690 listener->commit(listener);
2691 }
2692 flatview_unref(view);
2693 }
2694
2695 static void listener_del_address_space(MemoryListener *listener,
2696 AddressSpace *as)
2697 {
2698 FlatView *view;
2699 FlatRange *fr;
2700
2701 if (listener->begin) {
2702 listener->begin(listener);
2703 }
2704 view = address_space_get_flatview(as);
2705 FOR_EACH_FLAT_RANGE(fr, view) {
2706 MemoryRegionSection section = section_from_flat_range(fr, view);
2707
2708 if (fr->dirty_log_mask && listener->log_stop) {
2709 listener->log_stop(listener, &section, fr->dirty_log_mask, 0);
2710 }
2711 if (listener->region_del) {
2712 listener->region_del(listener, &section);
2713 }
2714 }
2715 if (listener->commit) {
2716 listener->commit(listener);
2717 }
2718 flatview_unref(view);
2719 }
2720
2721 void memory_listener_register(MemoryListener *listener, AddressSpace *as)
2722 {
2723 MemoryListener *other = NULL;
2724
2725 listener->address_space = as;
2726 if (QTAILQ_EMPTY(&memory_listeners)
2727 || listener->priority >= QTAILQ_LAST(&memory_listeners)->priority) {
2728 QTAILQ_INSERT_TAIL(&memory_listeners, listener, link);
2729 } else {
2730 QTAILQ_FOREACH(other, &memory_listeners, link) {
2731 if (listener->priority < other->priority) {
2732 break;
2733 }
2734 }
2735 QTAILQ_INSERT_BEFORE(other, listener, link);
2736 }
2737
2738 if (QTAILQ_EMPTY(&as->listeners)
2739 || listener->priority >= QTAILQ_LAST(&as->listeners)->priority) {
2740 QTAILQ_INSERT_TAIL(&as->listeners, listener, link_as);
2741 } else {
2742 QTAILQ_FOREACH(other, &as->listeners, link_as) {
2743 if (listener->priority < other->priority) {
2744 break;
2745 }
2746 }
2747 QTAILQ_INSERT_BEFORE(other, listener, link_as);
2748 }
2749
2750 listener_add_address_space(listener, as);
2751 }
2752
2753 void memory_listener_unregister(MemoryListener *listener)
2754 {
2755 if (!listener->address_space) {
2756 return;
2757 }
2758
2759 listener_del_address_space(listener, listener->address_space);
2760 QTAILQ_REMOVE(&memory_listeners, listener, link);
2761 QTAILQ_REMOVE(&listener->address_space->listeners, listener, link_as);
2762 listener->address_space = NULL;
2763 }
2764
2765 void address_space_remove_listeners(AddressSpace *as)
2766 {
2767 while (!QTAILQ_EMPTY(&as->listeners)) {
2768 memory_listener_unregister(QTAILQ_FIRST(&as->listeners));
2769 }
2770 }
2771
2772 void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name)
2773 {
2774 memory_region_ref(root);
2775 as->root = root;
2776 as->current_map = NULL;
2777 as->ioeventfd_nb = 0;
2778 as->ioeventfds = NULL;
2779 QTAILQ_INIT(&as->listeners);
2780 QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link);
2781 as->name = g_strdup(name ? name : "anonymous");
2782 address_space_update_topology(as);
2783 address_space_update_ioeventfds(as);
2784 }
2785
2786 static void do_address_space_destroy(AddressSpace *as)
2787 {
2788 assert(QTAILQ_EMPTY(&as->listeners));
2789
2790 flatview_unref(as->current_map);
2791 g_free(as->name);
2792 g_free(as->ioeventfds);
2793 memory_region_unref(as->root);
2794 }
2795
2796 void address_space_destroy(AddressSpace *as)
2797 {
2798 MemoryRegion *root = as->root;
2799
2800 /* Flush out anything from MemoryListeners listening in on this */
2801 memory_region_transaction_begin();
2802 as->root = NULL;
2803 memory_region_transaction_commit();
2804 QTAILQ_REMOVE(&address_spaces, as, address_spaces_link);
2805
2806 /* At this point, as->dispatch and as->current_map are dummy
2807 * entries that the guest should never use. Wait for the old
2808 * values to expire before freeing the data.
2809 */
2810 as->root = root;
2811 call_rcu(as, do_address_space_destroy, rcu);
2812 }
2813
2814 static const char *memory_region_type(MemoryRegion *mr)
2815 {
2816 if (memory_region_is_ram_device(mr)) {
2817 return "ramd";
2818 } else if (memory_region_is_romd(mr)) {
2819 return "romd";
2820 } else if (memory_region_is_rom(mr)) {
2821 return "rom";
2822 } else if (memory_region_is_ram(mr)) {
2823 return "ram";
2824 } else {
2825 return "i/o";
2826 }
2827 }
2828
2829 typedef struct MemoryRegionList MemoryRegionList;
2830
2831 struct MemoryRegionList {
2832 const MemoryRegion *mr;
2833 QTAILQ_ENTRY(MemoryRegionList) mrqueue;
2834 };
2835
2836 typedef QTAILQ_HEAD(, MemoryRegionList) MemoryRegionListHead;
2837
2838 #define MR_SIZE(size) (int128_nz(size) ? (hwaddr)int128_get64( \
2839 int128_sub((size), int128_one())) : 0)
2840 #define MTREE_INDENT " "
2841
2842 static void mtree_expand_owner(const char *label, Object *obj)
2843 {
2844 DeviceState *dev = (DeviceState *) object_dynamic_cast(obj, TYPE_DEVICE);
2845
2846 qemu_printf(" %s:{%s", label, dev ? "dev" : "obj");
2847 if (dev && dev->id) {
2848 qemu_printf(" id=%s", dev->id);
2849 } else {
2850 gchar *canonical_path = object_get_canonical_path(obj);
2851 if (canonical_path) {
2852 qemu_printf(" path=%s", canonical_path);
2853 g_free(canonical_path);
2854 } else {
2855 qemu_printf(" type=%s", object_get_typename(obj));
2856 }
2857 }
2858 qemu_printf("}");
2859 }
2860
2861 static void mtree_print_mr_owner(const MemoryRegion *mr)
2862 {
2863 Object *owner = mr->owner;
2864 Object *parent = memory_region_owner((MemoryRegion *)mr);
2865
2866 if (!owner && !parent) {
2867 qemu_printf(" orphan");
2868 return;
2869 }
2870 if (owner) {
2871 mtree_expand_owner("owner", owner);
2872 }
2873 if (parent && parent != owner) {
2874 mtree_expand_owner("parent", parent);
2875 }
2876 }
2877
2878 static void mtree_print_mr(const MemoryRegion *mr, unsigned int level,
2879 hwaddr base,
2880 MemoryRegionListHead *alias_print_queue,
2881 bool owner)
2882 {
2883 MemoryRegionList *new_ml, *ml, *next_ml;
2884 MemoryRegionListHead submr_print_queue;
2885 const MemoryRegion *submr;
2886 unsigned int i;
2887 hwaddr cur_start, cur_end;
2888
2889 if (!mr) {
2890 return;
2891 }
2892
2893 for (i = 0; i < level; i++) {
2894 qemu_printf(MTREE_INDENT);
2895 }
2896
2897 cur_start = base + mr->addr;
2898 cur_end = cur_start + MR_SIZE(mr->size);
2899
2900 /*
2901 * Try to detect overflow of memory region. This should never
2902 * happen normally. When it happens, we dump something to warn the
2903 * user who is observing this.
2904 */
2905 if (cur_start < base || cur_end < cur_start) {
2906 qemu_printf("[DETECTED OVERFLOW!] ");
2907 }
2908
2909 if (mr->alias) {
2910 MemoryRegionList *ml;
2911 bool found = false;
2912
2913 /* check if the alias is already in the queue */
2914 QTAILQ_FOREACH(ml, alias_print_queue, mrqueue) {
2915 if (ml->mr == mr->alias) {
2916 found = true;
2917 }
2918 }
2919
2920 if (!found) {
2921 ml = g_new(MemoryRegionList, 1);
2922 ml->mr = mr->alias;
2923 QTAILQ_INSERT_TAIL(alias_print_queue, ml, mrqueue);
2924 }
2925 qemu_printf(TARGET_FMT_plx "-" TARGET_FMT_plx
2926 " (prio %d, %s%s): alias %s @%s " TARGET_FMT_plx
2927 "-" TARGET_FMT_plx "%s",
2928 cur_start, cur_end,
2929 mr->priority,
2930 mr->nonvolatile ? "nv-" : "",
2931 memory_region_type((MemoryRegion *)mr),
2932 memory_region_name(mr),
2933 memory_region_name(mr->alias),
2934 mr->alias_offset,
2935 mr->alias_offset + MR_SIZE(mr->size),
2936 mr->enabled ? "" : " [disabled]");
2937 if (owner) {
2938 mtree_print_mr_owner(mr);
2939 }
2940 } else {
2941 qemu_printf(TARGET_FMT_plx "-" TARGET_FMT_plx
2942 " (prio %d, %s%s): %s%s",
2943 cur_start, cur_end,
2944 mr->priority,
2945 mr->nonvolatile ? "nv-" : "",
2946 memory_region_type((MemoryRegion *)mr),
2947 memory_region_name(mr),
2948 mr->enabled ? "" : " [disabled]");
2949 if (owner) {
2950 mtree_print_mr_owner(mr);
2951 }
2952 }
2953 qemu_printf("\n");
2954
2955 QTAILQ_INIT(&submr_print_queue);
2956
2957 QTAILQ_FOREACH(submr, &mr->subregions, subregions_link) {
2958 new_ml = g_new(MemoryRegionList, 1);
2959 new_ml->mr = submr;
2960 QTAILQ_FOREACH(ml, &submr_print_queue, mrqueue) {
2961 if (new_ml->mr->addr < ml->mr->addr ||
2962 (new_ml->mr->addr == ml->mr->addr &&
2963 new_ml->mr->priority > ml->mr->priority)) {
2964 QTAILQ_INSERT_BEFORE(ml, new_ml, mrqueue);
2965 new_ml = NULL;
2966 break;
2967 }
2968 }
2969 if (new_ml) {
2970 QTAILQ_INSERT_TAIL(&submr_print_queue, new_ml, mrqueue);
2971 }
2972 }
2973
2974 QTAILQ_FOREACH(ml, &submr_print_queue, mrqueue) {
2975 mtree_print_mr(ml->mr, level + 1, cur_start,
2976 alias_print_queue, owner);
2977 }
2978
2979 QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, mrqueue, next_ml) {
2980 g_free(ml);
2981 }
2982 }
2983
2984 struct FlatViewInfo {
2985 int counter;
2986 bool dispatch_tree;
2987 bool owner;
2988 AccelClass *ac;
2989 const char *ac_name;
2990 };
2991
2992 static void mtree_print_flatview(gpointer key, gpointer value,
2993 gpointer user_data)
2994 {
2995 FlatView *view = key;
2996 GArray *fv_address_spaces = value;
2997 struct FlatViewInfo *fvi = user_data;
2998 FlatRange *range = &view->ranges[0];
2999 MemoryRegion *mr;
3000 int n = view->nr;
3001 int i;
3002 AddressSpace *as;
3003
3004 qemu_printf("FlatView #%d\n", fvi->counter);
3005 ++fvi->counter;
3006
3007 for (i = 0; i < fv_address_spaces->len; ++i) {
3008 as = g_array_index(fv_address_spaces, AddressSpace*, i);
3009 qemu_printf(" AS \"%s\", root: %s",
3010 as->name, memory_region_name(as->root));
3011 if (as->root->alias) {
3012 qemu_printf(", alias %s", memory_region_name(as->root->alias));
3013 }
3014 qemu_printf("\n");
3015 }
3016
3017 qemu_printf(" Root memory region: %s\n",
3018 view->root ? memory_region_name(view->root) : "(none)");
3019
3020 if (n <= 0) {
3021 qemu_printf(MTREE_INDENT "No rendered FlatView\n\n");
3022 return;
3023 }
3024
3025 while (n--) {
3026 mr = range->mr;
3027 if (range->offset_in_region) {
3028 qemu_printf(MTREE_INDENT TARGET_FMT_plx "-" TARGET_FMT_plx
3029 " (prio %d, %s%s): %s @" TARGET_FMT_plx,
3030 int128_get64(range->addr.start),
3031 int128_get64(range->addr.start)
3032 + MR_SIZE(range->addr.size),
3033 mr->priority,
3034 range->nonvolatile ? "nv-" : "",
3035 range->readonly ? "rom" : memory_region_type(mr),
3036 memory_region_name(mr),
3037 range->offset_in_region);
3038 } else {
3039 qemu_printf(MTREE_INDENT TARGET_FMT_plx "-" TARGET_FMT_plx
3040 " (prio %d, %s%s): %s",
3041 int128_get64(range->addr.start),
3042 int128_get64(range->addr.start)
3043 + MR_SIZE(range->addr.size),
3044 mr->priority,
3045 range->nonvolatile ? "nv-" : "",
3046 range->readonly ? "rom" : memory_region_type(mr),
3047 memory_region_name(mr));
3048 }
3049 if (fvi->owner) {
3050 mtree_print_mr_owner(mr);
3051 }
3052
3053 if (fvi->ac) {
3054 for (i = 0; i < fv_address_spaces->len; ++i) {
3055 as = g_array_index(fv_address_spaces, AddressSpace*, i);
3056 if (fvi->ac->has_memory(current_machine, as,
3057 int128_get64(range->addr.start),
3058 MR_SIZE(range->addr.size) + 1)) {
3059 qemu_printf(" %s", fvi->ac_name);
3060 }
3061 }
3062 }
3063 qemu_printf("\n");
3064 range++;
3065 }
3066
3067 #if !defined(CONFIG_USER_ONLY)
3068 if (fvi->dispatch_tree && view->root) {
3069 mtree_print_dispatch(view->dispatch, view->root);
3070 }
3071 #endif
3072
3073 qemu_printf("\n");
3074 }
3075
3076 static gboolean mtree_info_flatview_free(gpointer key, gpointer value,
3077 gpointer user_data)
3078 {
3079 FlatView *view = key;
3080 GArray *fv_address_spaces = value;
3081
3082 g_array_unref(fv_address_spaces);
3083 flatview_unref(view);
3084
3085 return true;
3086 }
3087
3088 void mtree_info(bool flatview, bool dispatch_tree, bool owner)
3089 {
3090 MemoryRegionListHead ml_head;
3091 MemoryRegionList *ml, *ml2;
3092 AddressSpace *as;
3093
3094 if (flatview) {
3095 FlatView *view;
3096 struct FlatViewInfo fvi = {
3097 .counter = 0,
3098 .dispatch_tree = dispatch_tree,
3099 .owner = owner,
3100 };
3101 GArray *fv_address_spaces;
3102 GHashTable *views = g_hash_table_new(g_direct_hash, g_direct_equal);
3103 AccelClass *ac = ACCEL_GET_CLASS(current_machine->accelerator);
3104
3105 if (ac->has_memory) {
3106 fvi.ac = ac;
3107 fvi.ac_name = current_machine->accel ? current_machine->accel :
3108 object_class_get_name(OBJECT_CLASS(ac));
3109 }
3110
3111 /* Gather all FVs in one table */
3112 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
3113 view = address_space_get_flatview(as);
3114
3115 fv_address_spaces = g_hash_table_lookup(views, view);
3116 if (!fv_address_spaces) {
3117 fv_address_spaces = g_array_new(false, false, sizeof(as));
3118 g_hash_table_insert(views, view, fv_address_spaces);
3119 }
3120
3121 g_array_append_val(fv_address_spaces, as);
3122 }
3123
3124 /* Print */
3125 g_hash_table_foreach(views, mtree_print_flatview, &fvi);
3126
3127 /* Free */
3128 g_hash_table_foreach_remove(views, mtree_info_flatview_free, 0);
3129 g_hash_table_unref(views);
3130
3131 return;
3132 }
3133
3134 QTAILQ_INIT(&ml_head);
3135
3136 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
3137 qemu_printf("address-space: %s\n", as->name);
3138 mtree_print_mr(as->root, 1, 0, &ml_head, owner);
3139 qemu_printf("\n");
3140 }
3141
3142 /* print aliased regions */
3143 QTAILQ_FOREACH(ml, &ml_head, mrqueue) {
3144 qemu_printf("memory-region: %s\n", memory_region_name(ml->mr));
3145 mtree_print_mr(ml->mr, 1, 0, &ml_head, owner);
3146 qemu_printf("\n");
3147 }
3148
3149 QTAILQ_FOREACH_SAFE(ml, &ml_head, mrqueue, ml2) {
3150 g_free(ml);
3151 }
3152 }
3153
3154 void memory_region_init_ram(MemoryRegion *mr,
3155 struct Object *owner,
3156 const char *name,
3157 uint64_t size,
3158 Error **errp)
3159 {
3160 DeviceState *owner_dev;
3161 Error *err = NULL;
3162
3163 memory_region_init_ram_nomigrate(mr, owner, name, size, &err);
3164 if (err) {
3165 error_propagate(errp, err);
3166 return;
3167 }
3168 /* This will assert if owner is neither NULL nor a DeviceState.
3169 * We only want the owner here for the purposes of defining a
3170 * unique name for migration. TODO: Ideally we should implement
3171 * a naming scheme for Objects which are not DeviceStates, in
3172 * which case we can relax this restriction.
3173 */
3174 owner_dev = DEVICE(owner);
3175 vmstate_register_ram(mr, owner_dev);
3176 }
3177
3178 void memory_region_init_rom(MemoryRegion *mr,
3179 struct Object *owner,
3180 const char *name,
3181 uint64_t size,
3182 Error **errp)
3183 {
3184 DeviceState *owner_dev;
3185 Error *err = NULL;
3186
3187 memory_region_init_rom_nomigrate(mr, owner, name, size, &err);
3188 if (err) {
3189 error_propagate(errp, err);
3190 return;
3191 }
3192 /* This will assert if owner is neither NULL nor a DeviceState.
3193 * We only want the owner here for the purposes of defining a
3194 * unique name for migration. TODO: Ideally we should implement
3195 * a naming scheme for Objects which are not DeviceStates, in
3196 * which case we can relax this restriction.
3197 */
3198 owner_dev = DEVICE(owner);
3199 vmstate_register_ram(mr, owner_dev);
3200 }
3201
3202 void memory_region_init_rom_device(MemoryRegion *mr,
3203 struct Object *owner,
3204 const MemoryRegionOps *ops,
3205 void *opaque,
3206 const char *name,
3207 uint64_t size,
3208 Error **errp)
3209 {
3210 DeviceState *owner_dev;
3211 Error *err = NULL;
3212
3213 memory_region_init_rom_device_nomigrate(mr, owner, ops, opaque,
3214 name, size, &err);
3215 if (err) {
3216 error_propagate(errp, err);
3217 return;
3218 }
3219 /* This will assert if owner is neither NULL nor a DeviceState.
3220 * We only want the owner here for the purposes of defining a
3221 * unique name for migration. TODO: Ideally we should implement
3222 * a naming scheme for Objects which are not DeviceStates, in
3223 * which case we can relax this restriction.
3224 */
3225 owner_dev = DEVICE(owner);
3226 vmstate_register_ram(mr, owner_dev);
3227 }
3228
3229 static const TypeInfo memory_region_info = {
3230 .parent = TYPE_OBJECT,
3231 .name = TYPE_MEMORY_REGION,
3232 .class_size = sizeof(MemoryRegionClass),
3233 .instance_size = sizeof(MemoryRegion),
3234 .instance_init = memory_region_initfn,
3235 .instance_finalize = memory_region_finalize,
3236 };
3237
3238 static const TypeInfo iommu_memory_region_info = {
3239 .parent = TYPE_MEMORY_REGION,
3240 .name = TYPE_IOMMU_MEMORY_REGION,
3241 .class_size = sizeof(IOMMUMemoryRegionClass),
3242 .instance_size = sizeof(IOMMUMemoryRegion),
3243 .instance_init = iommu_memory_region_initfn,
3244 .abstract = true,
3245 };
3246
3247 static void memory_register_types(void)
3248 {
3249 type_register_static(&memory_region_info);
3250 type_register_static(&iommu_memory_region_info);
3251 }
3252
3253 type_init(memory_register_types)
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