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qapi: Fix misspelled section tags in doc comments
[qemu/armbru.git] / softmmu / memory.c
blobb1a6cae6f58370015253d894b96b92788cad1c29
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 "qemu/log.h"
18 #include "qapi/error.h"
19 #include "exec/memory.h"
20 #include "qapi/visitor.h"
21 #include "qemu/bitops.h"
22 #include "qemu/error-report.h"
23 #include "qemu/main-loop.h"
24 #include "qemu/qemu-print.h"
25 #include "qom/object.h"
26 #include "trace.h"
27
28 #include "exec/memory-internal.h"
29 #include "exec/ram_addr.h"
30 #include "sysemu/kvm.h"
31 #include "sysemu/runstate.h"
32 #include "sysemu/tcg.h"
33 #include "qemu/accel.h"
34 #include "hw/boards.h"
35 #include "migration/vmstate.h"
36 #include "exec/address-spaces.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 unsigned int global_dirty_tracking;
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 if (int128_eq(a->addr.start, b->addr.start) &&
208 (!int128_nz(a->addr.size) || !int128_nz(b->addr.size) ||
209 (int128_eq(a->addr.size, b->addr.size) &&
210 (a->match_data == b->match_data) &&
211 ((a->match_data && (a->data == b->data)) || !a->match_data) &&
212 (a->e == b->e))))
213 return true;
214
215 return false;
216 }
217
218 /* Range of memory in the global map. Addresses are absolute. */
219 struct FlatRange {
220 MemoryRegion *mr;
221 hwaddr offset_in_region;
222 AddrRange addr;
223 uint8_t dirty_log_mask;
224 bool romd_mode;
225 bool readonly;
226 bool nonvolatile;
227 };
228
229 #define FOR_EACH_FLAT_RANGE(var, view) \
230 for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
231
232 static inline MemoryRegionSection
233 section_from_flat_range(FlatRange *fr, FlatView *fv)
234 {
235 return (MemoryRegionSection) {
236 .mr = fr->mr,
237 .fv = fv,
238 .offset_within_region = fr->offset_in_region,
239 .size = fr->addr.size,
240 .offset_within_address_space = int128_get64(fr->addr.start),
241 .readonly = fr->readonly,
242 .nonvolatile = fr->nonvolatile,
243 };
244 }
245
246 static bool flatrange_equal(FlatRange *a, FlatRange *b)
247 {
248 return a->mr == b->mr
249 && addrrange_equal(a->addr, b->addr)
250 && a->offset_in_region == b->offset_in_region
251 && a->romd_mode == b->romd_mode
252 && a->readonly == b->readonly
253 && a->nonvolatile == b->nonvolatile;
254 }
255
256 static FlatView *flatview_new(MemoryRegion *mr_root)
257 {
258 FlatView *view;
259
260 view = g_new0(FlatView, 1);
261 view->ref = 1;
262 view->root = mr_root;
263 memory_region_ref(mr_root);
264 trace_flatview_new(view, mr_root);
265
266 return view;
267 }
268
269 /* Insert a range into a given position. Caller is responsible for maintaining
270 * sorting order.
271 */
272 static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range)
273 {
274 if (view->nr == view->nr_allocated) {
275 view->nr_allocated = MAX(2 * view->nr, 10);
276 view->ranges = g_realloc(view->ranges,
277 view->nr_allocated * sizeof(*view->ranges));
278 }
279 memmove(view->ranges + pos + 1, view->ranges + pos,
280 (view->nr - pos) * sizeof(FlatRange));
281 view->ranges[pos] = *range;
282 memory_region_ref(range->mr);
283 ++view->nr;
284 }
285
286 static void flatview_destroy(FlatView *view)
287 {
288 int i;
289
290 trace_flatview_destroy(view, view->root);
291 if (view->dispatch) {
292 address_space_dispatch_free(view->dispatch);
293 }
294 for (i = 0; i < view->nr; i++) {
295 memory_region_unref(view->ranges[i].mr);
296 }
297 g_free(view->ranges);
298 memory_region_unref(view->root);
299 g_free(view);
300 }
301
302 static bool flatview_ref(FlatView *view)
303 {
304 return qatomic_fetch_inc_nonzero(&view->ref) > 0;
305 }
306
307 void flatview_unref(FlatView *view)
308 {
309 if (qatomic_fetch_dec(&view->ref) == 1) {
310 trace_flatview_destroy_rcu(view, view->root);
311 assert(view->root);
312 call_rcu(view, flatview_destroy, rcu);
313 }
314 }
315
316 static bool can_merge(FlatRange *r1, FlatRange *r2)
317 {
318 return int128_eq(addrrange_end(r1->addr), r2->addr.start)
319 && r1->mr == r2->mr
320 && int128_eq(int128_add(int128_make64(r1->offset_in_region),
321 r1->addr.size),
322 int128_make64(r2->offset_in_region))
323 && r1->dirty_log_mask == r2->dirty_log_mask
324 && r1->romd_mode == r2->romd_mode
325 && r1->readonly == r2->readonly
326 && r1->nonvolatile == r2->nonvolatile;
327 }
328
329 /* Attempt to simplify a view by merging adjacent ranges */
330 static void flatview_simplify(FlatView *view)
331 {
332 unsigned i, j, k;
333
334 i = 0;
335 while (i < view->nr) {
336 j = i + 1;
337 while (j < view->nr
338 && can_merge(&view->ranges[j-1], &view->ranges[j])) {
339 int128_addto(&view->ranges[i].addr.size, view->ranges[j].addr.size);
340 ++j;
341 }
342 ++i;
343 for (k = i; k < j; k++) {
344 memory_region_unref(view->ranges[k].mr);
345 }
346 memmove(&view->ranges[i], &view->ranges[j],
347 (view->nr - j) * sizeof(view->ranges[j]));
348 view->nr -= j - i;
349 }
350 }
351
352 static bool memory_region_big_endian(MemoryRegion *mr)
353 {
354 #if TARGET_BIG_ENDIAN
355 return mr->ops->endianness != DEVICE_LITTLE_ENDIAN;
356 #else
357 return mr->ops->endianness == DEVICE_BIG_ENDIAN;
358 #endif
359 }
360
361 static void adjust_endianness(MemoryRegion *mr, uint64_t *data, MemOp op)
362 {
363 if ((op & MO_BSWAP) != devend_memop(mr->ops->endianness)) {
364 switch (op & MO_SIZE) {
365 case MO_8:
366 break;
367 case MO_16:
368 *data = bswap16(*data);
369 break;
370 case MO_32:
371 *data = bswap32(*data);
372 break;
373 case MO_64:
374 *data = bswap64(*data);
375 break;
376 default:
377 g_assert_not_reached();
378 }
379 }
380 }
381
382 static inline void memory_region_shift_read_access(uint64_t *value,
383 signed shift,
384 uint64_t mask,
385 uint64_t tmp)
386 {
387 if (shift >= 0) {
388 *value |= (tmp & mask) << shift;
389 } else {
390 *value |= (tmp & mask) >> -shift;
391 }
392 }
393
394 static inline uint64_t memory_region_shift_write_access(uint64_t *value,
395 signed shift,
396 uint64_t mask)
397 {
398 uint64_t tmp;
399
400 if (shift >= 0) {
401 tmp = (*value >> shift) & mask;
402 } else {
403 tmp = (*value << -shift) & mask;
404 }
405
406 return tmp;
407 }
408
409 static hwaddr memory_region_to_absolute_addr(MemoryRegion *mr, hwaddr offset)
410 {
411 MemoryRegion *root;
412 hwaddr abs_addr = offset;
413
414 abs_addr += mr->addr;
415 for (root = mr; root->container; ) {
416 root = root->container;
417 abs_addr += root->addr;
418 }
419
420 return abs_addr;
421 }
422
423 static int get_cpu_index(void)
424 {
425 if (current_cpu) {
426 return current_cpu->cpu_index;
427 }
428 return -1;
429 }
430
431 static MemTxResult memory_region_read_accessor(MemoryRegion *mr,
432 hwaddr addr,
433 uint64_t *value,
434 unsigned size,
435 signed shift,
436 uint64_t mask,
437 MemTxAttrs attrs)
438 {
439 uint64_t tmp;
440
441 tmp = mr->ops->read(mr->opaque, addr, size);
442 if (mr->subpage) {
443 trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size);
444 } else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_READ)) {
445 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
446 trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size,
447 memory_region_name(mr));
448 }
449 memory_region_shift_read_access(value, shift, mask, tmp);
450 return MEMTX_OK;
451 }
452
453 static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
454 hwaddr addr,
455 uint64_t *value,
456 unsigned size,
457 signed shift,
458 uint64_t mask,
459 MemTxAttrs attrs)
460 {
461 uint64_t tmp = 0;
462 MemTxResult r;
463
464 r = mr->ops->read_with_attrs(mr->opaque, addr, &tmp, size, attrs);
465 if (mr->subpage) {
466 trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size);
467 } else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_READ)) {
468 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
469 trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size,
470 memory_region_name(mr));
471 }
472 memory_region_shift_read_access(value, shift, mask, tmp);
473 return r;
474 }
475
476 static MemTxResult memory_region_write_accessor(MemoryRegion *mr,
477 hwaddr addr,
478 uint64_t *value,
479 unsigned size,
480 signed shift,
481 uint64_t mask,
482 MemTxAttrs attrs)
483 {
484 uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
485
486 if (mr->subpage) {
487 trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
488 } else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_WRITE)) {
489 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
490 trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size,
491 memory_region_name(mr));
492 }
493 mr->ops->write(mr->opaque, addr, tmp, size);
494 return MEMTX_OK;
495 }
496
497 static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr,
498 hwaddr addr,
499 uint64_t *value,
500 unsigned size,
501 signed shift,
502 uint64_t mask,
503 MemTxAttrs attrs)
504 {
505 uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
506
507 if (mr->subpage) {
508 trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
509 } else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_WRITE)) {
510 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
511 trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size,
512 memory_region_name(mr));
513 }
514 return mr->ops->write_with_attrs(mr->opaque, addr, tmp, size, attrs);
515 }
516
517 static MemTxResult access_with_adjusted_size(hwaddr addr,
518 uint64_t *value,
519 unsigned size,
520 unsigned access_size_min,
521 unsigned access_size_max,
522 MemTxResult (*access_fn)
523 (MemoryRegion *mr,
524 hwaddr addr,
525 uint64_t *value,
526 unsigned size,
527 signed shift,
528 uint64_t mask,
529 MemTxAttrs attrs),
530 MemoryRegion *mr,
531 MemTxAttrs attrs)
532 {
533 uint64_t access_mask;
534 unsigned access_size;
535 unsigned i;
536 MemTxResult r = MEMTX_OK;
537
538 if (!access_size_min) {
539 access_size_min = 1;
540 }
541 if (!access_size_max) {
542 access_size_max = 4;
543 }
544
545 /* FIXME: support unaligned access? */
546 access_size = MAX(MIN(size, access_size_max), access_size_min);
547 access_mask = MAKE_64BIT_MASK(0, access_size * 8);
548 if (memory_region_big_endian(mr)) {
549 for (i = 0; i < size; i += access_size) {
550 r |= access_fn(mr, addr + i, value, access_size,
551 (size - access_size - i) * 8, access_mask, attrs);
552 }
553 } else {
554 for (i = 0; i < size; i += access_size) {
555 r |= access_fn(mr, addr + i, value, access_size, i * 8,
556 access_mask, attrs);
557 }
558 }
559 return r;
560 }
561
562 static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
563 {
564 AddressSpace *as;
565
566 while (mr->container) {
567 mr = mr->container;
568 }
569 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
570 if (mr == as->root) {
571 return as;
572 }
573 }
574 return NULL;
575 }
576
577 /* Render a memory region into the global view. Ranges in @view obscure
578 * ranges in @mr.
579 */
580 static void render_memory_region(FlatView *view,
581 MemoryRegion *mr,
582 Int128 base,
583 AddrRange clip,
584 bool readonly,
585 bool nonvolatile)
586 {
587 MemoryRegion *subregion;
588 unsigned i;
589 hwaddr offset_in_region;
590 Int128 remain;
591 Int128 now;
592 FlatRange fr;
593 AddrRange tmp;
594
595 if (!mr->enabled) {
596 return;
597 }
598
599 int128_addto(&base, int128_make64(mr->addr));
600 readonly |= mr->readonly;
601 nonvolatile |= mr->nonvolatile;
602
603 tmp = addrrange_make(base, mr->size);
604
605 if (!addrrange_intersects(tmp, clip)) {
606 return;
607 }
608
609 clip = addrrange_intersection(tmp, clip);
610
611 if (mr->alias) {
612 int128_subfrom(&base, int128_make64(mr->alias->addr));
613 int128_subfrom(&base, int128_make64(mr->alias_offset));
614 render_memory_region(view, mr->alias, base, clip,
615 readonly, nonvolatile);
616 return;
617 }
618
619 /* Render subregions in priority order. */
620 QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
621 render_memory_region(view, subregion, base, clip,
622 readonly, nonvolatile);
623 }
624
625 if (!mr->terminates) {
626 return;
627 }
628
629 offset_in_region = int128_get64(int128_sub(clip.start, base));
630 base = clip.start;
631 remain = clip.size;
632
633 fr.mr = mr;
634 fr.dirty_log_mask = memory_region_get_dirty_log_mask(mr);
635 fr.romd_mode = mr->romd_mode;
636 fr.readonly = readonly;
637 fr.nonvolatile = nonvolatile;
638
639 /* Render the region itself into any gaps left by the current view. */
640 for (i = 0; i < view->nr && int128_nz(remain); ++i) {
641 if (int128_ge(base, addrrange_end(view->ranges[i].addr))) {
642 continue;
643 }
644 if (int128_lt(base, view->ranges[i].addr.start)) {
645 now = int128_min(remain,
646 int128_sub(view->ranges[i].addr.start, base));
647 fr.offset_in_region = offset_in_region;
648 fr.addr = addrrange_make(base, now);
649 flatview_insert(view, i, &fr);
650 ++i;
651 int128_addto(&base, now);
652 offset_in_region += int128_get64(now);
653 int128_subfrom(&remain, now);
654 }
655 now = int128_sub(int128_min(int128_add(base, remain),
656 addrrange_end(view->ranges[i].addr)),
657 base);
658 int128_addto(&base, now);
659 offset_in_region += int128_get64(now);
660 int128_subfrom(&remain, now);
661 }
662 if (int128_nz(remain)) {
663 fr.offset_in_region = offset_in_region;
664 fr.addr = addrrange_make(base, remain);
665 flatview_insert(view, i, &fr);
666 }
667 }
668
669 void flatview_for_each_range(FlatView *fv, flatview_cb cb , void *opaque)
670 {
671 FlatRange *fr;
672
673 assert(fv);
674 assert(cb);
675
676 FOR_EACH_FLAT_RANGE(fr, fv) {
677 if (cb(fr->addr.start, fr->addr.size, fr->mr,
678 fr->offset_in_region, opaque)) {
679 break;
680 }
681 }
682 }
683
684 static MemoryRegion *memory_region_get_flatview_root(MemoryRegion *mr)
685 {
686 while (mr->enabled) {
687 if (mr->alias) {
688 if (!mr->alias_offset && int128_ge(mr->size, mr->alias->size)) {
689 /* The alias is included in its entirety. Use it as
690 * the "real" root, so that we can share more FlatViews.
691 */
692 mr = mr->alias;
693 continue;
694 }
695 } else if (!mr->terminates) {
696 unsigned int found = 0;
697 MemoryRegion *child, *next = NULL;
698 QTAILQ_FOREACH(child, &mr->subregions, subregions_link) {
699 if (child->enabled) {
700 if (++found > 1) {
701 next = NULL;
702 break;
703 }
704 if (!child->addr && int128_ge(mr->size, child->size)) {
705 /* A child is included in its entirety. If it's the only
706 * enabled one, use it in the hope of finding an alias down the
707 * way. This will also let us share FlatViews.
708 */
709 next = child;
710 }
711 }
712 }
713 if (found == 0) {
714 return NULL;
715 }
716 if (next) {
717 mr = next;
718 continue;
719 }
720 }
721
722 return mr;
723 }
724
725 return NULL;
726 }
727
728 /* Render a memory topology into a list of disjoint absolute ranges. */
729 static FlatView *generate_memory_topology(MemoryRegion *mr)
730 {
731 int i;
732 FlatView *view;
733
734 view = flatview_new(mr);
735
736 if (mr) {
737 render_memory_region(view, mr, int128_zero(),
738 addrrange_make(int128_zero(), int128_2_64()),
739 false, false);
740 }
741 flatview_simplify(view);
742
743 view->dispatch = address_space_dispatch_new(view);
744 for (i = 0; i < view->nr; i++) {
745 MemoryRegionSection mrs =
746 section_from_flat_range(&view->ranges[i], view);
747 flatview_add_to_dispatch(view, &mrs);
748 }
749 address_space_dispatch_compact(view->dispatch);
750 g_hash_table_replace(flat_views, mr, view);
751
752 return view;
753 }
754
755 static void address_space_add_del_ioeventfds(AddressSpace *as,
756 MemoryRegionIoeventfd *fds_new,
757 unsigned fds_new_nb,
758 MemoryRegionIoeventfd *fds_old,
759 unsigned fds_old_nb)
760 {
761 unsigned iold, inew;
762 MemoryRegionIoeventfd *fd;
763 MemoryRegionSection section;
764
765 /* Generate a symmetric difference of the old and new fd sets, adding
766 * and deleting as necessary.
767 */
768
769 iold = inew = 0;
770 while (iold < fds_old_nb || inew < fds_new_nb) {
771 if (iold < fds_old_nb
772 && (inew == fds_new_nb
773 || memory_region_ioeventfd_before(&fds_old[iold],
774 &fds_new[inew]))) {
775 fd = &fds_old[iold];
776 section = (MemoryRegionSection) {
777 .fv = address_space_to_flatview(as),
778 .offset_within_address_space = int128_get64(fd->addr.start),
779 .size = fd->addr.size,
780 };
781 MEMORY_LISTENER_CALL(as, eventfd_del, Forward, &section,
782 fd->match_data, fd->data, fd->e);
783 ++iold;
784 } else if (inew < fds_new_nb
785 && (iold == fds_old_nb
786 || memory_region_ioeventfd_before(&fds_new[inew],
787 &fds_old[iold]))) {
788 fd = &fds_new[inew];
789 section = (MemoryRegionSection) {
790 .fv = address_space_to_flatview(as),
791 .offset_within_address_space = int128_get64(fd->addr.start),
792 .size = fd->addr.size,
793 };
794 MEMORY_LISTENER_CALL(as, eventfd_add, Reverse, &section,
795 fd->match_data, fd->data, fd->e);
796 ++inew;
797 } else {
798 ++iold;
799 ++inew;
800 }
801 }
802 }
803
804 FlatView *address_space_get_flatview(AddressSpace *as)
805 {
806 FlatView *view;
807
808 RCU_READ_LOCK_GUARD();
809 do {
810 view = address_space_to_flatview(as);
811 /* If somebody has replaced as->current_map concurrently,
812 * flatview_ref returns false.
813 */
814 } while (!flatview_ref(view));
815 return view;
816 }
817
818 static void address_space_update_ioeventfds(AddressSpace *as)
819 {
820 FlatView *view;
821 FlatRange *fr;
822 unsigned ioeventfd_nb = 0;
823 unsigned ioeventfd_max;
824 MemoryRegionIoeventfd *ioeventfds;
825 AddrRange tmp;
826 unsigned i;
827
828 /*
829 * It is likely that the number of ioeventfds hasn't changed much, so use
830 * the previous size as the starting value, with some headroom to avoid
831 * gratuitous reallocations.
832 */
833 ioeventfd_max = QEMU_ALIGN_UP(as->ioeventfd_nb, 4);
834 ioeventfds = g_new(MemoryRegionIoeventfd, ioeventfd_max);
835
836 view = address_space_get_flatview(as);
837 FOR_EACH_FLAT_RANGE(fr, view) {
838 for (i = 0; i < fr->mr->ioeventfd_nb; ++i) {
839 tmp = addrrange_shift(fr->mr->ioeventfds[i].addr,
840 int128_sub(fr->addr.start,
841 int128_make64(fr->offset_in_region)));
842 if (addrrange_intersects(fr->addr, tmp)) {
843 ++ioeventfd_nb;
844 if (ioeventfd_nb > ioeventfd_max) {
845 ioeventfd_max = MAX(ioeventfd_max * 2, 4);
846 ioeventfds = g_realloc(ioeventfds,
847 ioeventfd_max * sizeof(*ioeventfds));
848 }
849 ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i];
850 ioeventfds[ioeventfd_nb-1].addr = tmp;
851 }
852 }
853 }
854
855 address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb,
856 as->ioeventfds, as->ioeventfd_nb);
857
858 g_free(as->ioeventfds);
859 as->ioeventfds = ioeventfds;
860 as->ioeventfd_nb = ioeventfd_nb;
861 flatview_unref(view);
862 }
863
864 /*
865 * Notify the memory listeners about the coalesced IO change events of
866 * range `cmr'. Only the part that has intersection of the specified
867 * FlatRange will be sent.
868 */
869 static void flat_range_coalesced_io_notify(FlatRange *fr, AddressSpace *as,
870 CoalescedMemoryRange *cmr, bool add)
871 {
872 AddrRange tmp;
873
874 tmp = addrrange_shift(cmr->addr,
875 int128_sub(fr->addr.start,
876 int128_make64(fr->offset_in_region)));
877 if (!addrrange_intersects(tmp, fr->addr)) {
878 return;
879 }
880 tmp = addrrange_intersection(tmp, fr->addr);
881
882 if (add) {
883 MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, coalesced_io_add,
884 int128_get64(tmp.start),
885 int128_get64(tmp.size));
886 } else {
887 MEMORY_LISTENER_UPDATE_REGION(fr, as, Reverse, coalesced_io_del,
888 int128_get64(tmp.start),
889 int128_get64(tmp.size));
890 }
891 }
892
893 static void flat_range_coalesced_io_del(FlatRange *fr, AddressSpace *as)
894 {
895 CoalescedMemoryRange *cmr;
896
897 QTAILQ_FOREACH(cmr, &fr->mr->coalesced, link) {
898 flat_range_coalesced_io_notify(fr, as, cmr, false);
899 }
900 }
901
902 static void flat_range_coalesced_io_add(FlatRange *fr, AddressSpace *as)
903 {
904 MemoryRegion *mr = fr->mr;
905 CoalescedMemoryRange *cmr;
906
907 if (QTAILQ_EMPTY(&mr->coalesced)) {
908 return;
909 }
910
911 QTAILQ_FOREACH(cmr, &mr->coalesced, link) {
912 flat_range_coalesced_io_notify(fr, as, cmr, true);
913 }
914 }
915
916 static void address_space_update_topology_pass(AddressSpace *as,
917 const FlatView *old_view,
918 const FlatView *new_view,
919 bool adding)
920 {
921 unsigned iold, inew;
922 FlatRange *frold, *frnew;
923
924 /* Generate a symmetric difference of the old and new memory maps.
925 * Kill ranges in the old map, and instantiate ranges in the new map.
926 */
927 iold = inew = 0;
928 while (iold < old_view->nr || inew < new_view->nr) {
929 if (iold < old_view->nr) {
930 frold = &old_view->ranges[iold];
931 } else {
932 frold = NULL;
933 }
934 if (inew < new_view->nr) {
935 frnew = &new_view->ranges[inew];
936 } else {
937 frnew = NULL;
938 }
939
940 if (frold
941 && (!frnew
942 || int128_lt(frold->addr.start, frnew->addr.start)
943 || (int128_eq(frold->addr.start, frnew->addr.start)
944 && !flatrange_equal(frold, frnew)))) {
945 /* In old but not in new, or in both but attributes changed. */
946
947 if (!adding) {
948 flat_range_coalesced_io_del(frold, as);
949 MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del);
950 }
951
952 ++iold;
953 } else if (frold && frnew && flatrange_equal(frold, frnew)) {
954 /* In both and unchanged (except logging may have changed) */
955
956 if (adding) {
957 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop);
958 if (frnew->dirty_log_mask & ~frold->dirty_log_mask) {
959 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start,
960 frold->dirty_log_mask,
961 frnew->dirty_log_mask);
962 }
963 if (frold->dirty_log_mask & ~frnew->dirty_log_mask) {
964 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop,
965 frold->dirty_log_mask,
966 frnew->dirty_log_mask);
967 }
968 }
969
970 ++iold;
971 ++inew;
972 } else {
973 /* In new */
974
975 if (adding) {
976 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add);
977 flat_range_coalesced_io_add(frnew, as);
978 }
979
980 ++inew;
981 }
982 }
983 }
984
985 static void flatviews_init(void)
986 {
987 static FlatView *empty_view;
988
989 if (flat_views) {
990 return;
991 }
992
993 flat_views = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL,
994 (GDestroyNotify) flatview_unref);
995 if (!empty_view) {
996 empty_view = generate_memory_topology(NULL);
997 /* We keep it alive forever in the global variable. */
998 flatview_ref(empty_view);
999 } else {
1000 g_hash_table_replace(flat_views, NULL, empty_view);
1001 flatview_ref(empty_view);
1002 }
1003 }
1004
1005 static void flatviews_reset(void)
1006 {
1007 AddressSpace *as;
1008
1009 if (flat_views) {
1010 g_hash_table_unref(flat_views);
1011 flat_views = NULL;
1012 }
1013 flatviews_init();
1014
1015 /* Render unique FVs */
1016 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1017 MemoryRegion *physmr = memory_region_get_flatview_root(as->root);
1018
1019 if (g_hash_table_lookup(flat_views, physmr)) {
1020 continue;
1021 }
1022
1023 generate_memory_topology(physmr);
1024 }
1025 }
1026
1027 static void address_space_set_flatview(AddressSpace *as)
1028 {
1029 FlatView *old_view = address_space_to_flatview(as);
1030 MemoryRegion *physmr = memory_region_get_flatview_root(as->root);
1031 FlatView *new_view = g_hash_table_lookup(flat_views, physmr);
1032
1033 assert(new_view);
1034
1035 if (old_view == new_view) {
1036 return;
1037 }
1038
1039 if (old_view) {
1040 flatview_ref(old_view);
1041 }
1042
1043 flatview_ref(new_view);
1044
1045 if (!QTAILQ_EMPTY(&as->listeners)) {
1046 FlatView tmpview = { .nr = 0 }, *old_view2 = old_view;
1047
1048 if (!old_view2) {
1049 old_view2 = &tmpview;
1050 }
1051 address_space_update_topology_pass(as, old_view2, new_view, false);
1052 address_space_update_topology_pass(as, old_view2, new_view, true);
1053 }
1054
1055 /* Writes are protected by the BQL. */
1056 qatomic_rcu_set(&as->current_map, new_view);
1057 if (old_view) {
1058 flatview_unref(old_view);
1059 }
1060
1061 /* Note that all the old MemoryRegions are still alive up to this
1062 * point. This relieves most MemoryListeners from the need to
1063 * ref/unref the MemoryRegions they get---unless they use them
1064 * outside the iothread mutex, in which case precise reference
1065 * counting is necessary.
1066 */
1067 if (old_view) {
1068 flatview_unref(old_view);
1069 }
1070 }
1071
1072 static void address_space_update_topology(AddressSpace *as)
1073 {
1074 MemoryRegion *physmr = memory_region_get_flatview_root(as->root);
1075
1076 flatviews_init();
1077 if (!g_hash_table_lookup(flat_views, physmr)) {
1078 generate_memory_topology(physmr);
1079 }
1080 address_space_set_flatview(as);
1081 }
1082
1083 void memory_region_transaction_begin(void)
1084 {
1085 qemu_flush_coalesced_mmio_buffer();
1086 ++memory_region_transaction_depth;
1087 }
1088
1089 void memory_region_transaction_commit(void)
1090 {
1091 AddressSpace *as;
1092
1093 assert(memory_region_transaction_depth);
1094 assert(qemu_mutex_iothread_locked());
1095
1096 --memory_region_transaction_depth;
1097 if (!memory_region_transaction_depth) {
1098 if (memory_region_update_pending) {
1099 flatviews_reset();
1100
1101 MEMORY_LISTENER_CALL_GLOBAL(begin, Forward);
1102
1103 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1104 address_space_set_flatview(as);
1105 address_space_update_ioeventfds(as);
1106 }
1107 memory_region_update_pending = false;
1108 ioeventfd_update_pending = false;
1109 MEMORY_LISTENER_CALL_GLOBAL(commit, Forward);
1110 } else if (ioeventfd_update_pending) {
1111 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1112 address_space_update_ioeventfds(as);
1113 }
1114 ioeventfd_update_pending = false;
1115 }
1116 }
1117 }
1118
1119 static void memory_region_destructor_none(MemoryRegion *mr)
1120 {
1121 }
1122
1123 static void memory_region_destructor_ram(MemoryRegion *mr)
1124 {
1125 qemu_ram_free(mr->ram_block);
1126 }
1127
1128 static bool memory_region_need_escape(char c)
1129 {
1130 return c == '/' || c == '[' || c == '\\' || c == ']';
1131 }
1132
1133 static char *memory_region_escape_name(const char *name)
1134 {
1135 const char *p;
1136 char *escaped, *q;
1137 uint8_t c;
1138 size_t bytes = 0;
1139
1140 for (p = name; *p; p++) {
1141 bytes += memory_region_need_escape(*p) ? 4 : 1;
1142 }
1143 if (bytes == p - name) {
1144 return g_memdup(name, bytes + 1);
1145 }
1146
1147 escaped = g_malloc(bytes + 1);
1148 for (p = name, q = escaped; *p; p++) {
1149 c = *p;
1150 if (unlikely(memory_region_need_escape(c))) {
1151 *q++ = '\\';
1152 *q++ = 'x';
1153 *q++ = "0123456789abcdef"[c >> 4];
1154 c = "0123456789abcdef"[c & 15];
1155 }
1156 *q++ = c;
1157 }
1158 *q = 0;
1159 return escaped;
1160 }
1161
1162 static void memory_region_do_init(MemoryRegion *mr,
1163 Object *owner,
1164 const char *name,
1165 uint64_t size)
1166 {
1167 mr->size = int128_make64(size);
1168 if (size == UINT64_MAX) {
1169 mr->size = int128_2_64();
1170 }
1171 mr->name = g_strdup(name);
1172 mr->owner = owner;
1173 mr->ram_block = NULL;
1174
1175 if (name) {
1176 char *escaped_name = memory_region_escape_name(name);
1177 char *name_array = g_strdup_printf("%s[*]", escaped_name);
1178
1179 if (!owner) {
1180 owner = container_get(qdev_get_machine(), "/unattached");
1181 }
1182
1183 object_property_add_child(owner, name_array, OBJECT(mr));
1184 object_unref(OBJECT(mr));
1185 g_free(name_array);
1186 g_free(escaped_name);
1187 }
1188 }
1189
1190 void memory_region_init(MemoryRegion *mr,
1191 Object *owner,
1192 const char *name,
1193 uint64_t size)
1194 {
1195 object_initialize(mr, sizeof(*mr), TYPE_MEMORY_REGION);
1196 memory_region_do_init(mr, owner, name, size);
1197 }
1198
1199 static void memory_region_get_container(Object *obj, Visitor *v,
1200 const char *name, void *opaque,
1201 Error **errp)
1202 {
1203 MemoryRegion *mr = MEMORY_REGION(obj);
1204 char *path = (char *)"";
1205
1206 if (mr->container) {
1207 path = object_get_canonical_path(OBJECT(mr->container));
1208 }
1209 visit_type_str(v, name, &path, errp);
1210 if (mr->container) {
1211 g_free(path);
1212 }
1213 }
1214
1215 static Object *memory_region_resolve_container(Object *obj, void *opaque,
1216 const char *part)
1217 {
1218 MemoryRegion *mr = MEMORY_REGION(obj);
1219
1220 return OBJECT(mr->container);
1221 }
1222
1223 static void memory_region_get_priority(Object *obj, Visitor *v,
1224 const char *name, void *opaque,
1225 Error **errp)
1226 {
1227 MemoryRegion *mr = MEMORY_REGION(obj);
1228 int32_t value = mr->priority;
1229
1230 visit_type_int32(v, name, &value, errp);
1231 }
1232
1233 static void memory_region_get_size(Object *obj, Visitor *v, const char *name,
1234 void *opaque, Error **errp)
1235 {
1236 MemoryRegion *mr = MEMORY_REGION(obj);
1237 uint64_t value = memory_region_size(mr);
1238
1239 visit_type_uint64(v, name, &value, errp);
1240 }
1241
1242 static void memory_region_initfn(Object *obj)
1243 {
1244 MemoryRegion *mr = MEMORY_REGION(obj);
1245 ObjectProperty *op;
1246
1247 mr->ops = &unassigned_mem_ops;
1248 mr->enabled = true;
1249 mr->romd_mode = true;
1250 mr->destructor = memory_region_destructor_none;
1251 QTAILQ_INIT(&mr->subregions);
1252 QTAILQ_INIT(&mr->coalesced);
1253
1254 op = object_property_add(OBJECT(mr), "container",
1255 "link<" TYPE_MEMORY_REGION ">",
1256 memory_region_get_container,
1257 NULL, /* memory_region_set_container */
1258 NULL, NULL);
1259 op->resolve = memory_region_resolve_container;
1260
1261 object_property_add_uint64_ptr(OBJECT(mr), "addr",
1262 &mr->addr, OBJ_PROP_FLAG_READ);
1263 object_property_add(OBJECT(mr), "priority", "uint32",
1264 memory_region_get_priority,
1265 NULL, /* memory_region_set_priority */
1266 NULL, NULL);
1267 object_property_add(OBJECT(mr), "size", "uint64",
1268 memory_region_get_size,
1269 NULL, /* memory_region_set_size, */
1270 NULL, NULL);
1271 }
1272
1273 static void iommu_memory_region_initfn(Object *obj)
1274 {
1275 MemoryRegion *mr = MEMORY_REGION(obj);
1276
1277 mr->is_iommu = true;
1278 }
1279
1280 static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
1281 unsigned size)
1282 {
1283 #ifdef DEBUG_UNASSIGNED
1284 printf("Unassigned mem read " HWADDR_FMT_plx "\n", addr);
1285 #endif
1286 return 0;
1287 }
1288
1289 static void unassigned_mem_write(void *opaque, hwaddr addr,
1290 uint64_t val, unsigned size)
1291 {
1292 #ifdef DEBUG_UNASSIGNED
1293 printf("Unassigned mem write " HWADDR_FMT_plx " = 0x%"PRIx64"\n", addr, val);
1294 #endif
1295 }
1296
1297 static bool unassigned_mem_accepts(void *opaque, hwaddr addr,
1298 unsigned size, bool is_write,
1299 MemTxAttrs attrs)
1300 {
1301 return false;
1302 }
1303
1304 const MemoryRegionOps unassigned_mem_ops = {
1305 .valid.accepts = unassigned_mem_accepts,
1306 .endianness = DEVICE_NATIVE_ENDIAN,
1307 };
1308
1309 static uint64_t memory_region_ram_device_read(void *opaque,
1310 hwaddr addr, unsigned size)
1311 {
1312 MemoryRegion *mr = opaque;
1313 uint64_t data = (uint64_t)~0;
1314
1315 switch (size) {
1316 case 1:
1317 data = *(uint8_t *)(mr->ram_block->host + addr);
1318 break;
1319 case 2:
1320 data = *(uint16_t *)(mr->ram_block->host + addr);
1321 break;
1322 case 4:
1323 data = *(uint32_t *)(mr->ram_block->host + addr);
1324 break;
1325 case 8:
1326 data = *(uint64_t *)(mr->ram_block->host + addr);
1327 break;
1328 }
1329
1330 trace_memory_region_ram_device_read(get_cpu_index(), mr, addr, data, size);
1331
1332 return data;
1333 }
1334
1335 static void memory_region_ram_device_write(void *opaque, hwaddr addr,
1336 uint64_t data, unsigned size)
1337 {
1338 MemoryRegion *mr = opaque;
1339
1340 trace_memory_region_ram_device_write(get_cpu_index(), mr, addr, data, size);
1341
1342 switch (size) {
1343 case 1:
1344 *(uint8_t *)(mr->ram_block->host + addr) = (uint8_t)data;
1345 break;
1346 case 2:
1347 *(uint16_t *)(mr->ram_block->host + addr) = (uint16_t)data;
1348 break;
1349 case 4:
1350 *(uint32_t *)(mr->ram_block->host + addr) = (uint32_t)data;
1351 break;
1352 case 8:
1353 *(uint64_t *)(mr->ram_block->host + addr) = data;
1354 break;
1355 }
1356 }
1357
1358 static const MemoryRegionOps ram_device_mem_ops = {
1359 .read = memory_region_ram_device_read,
1360 .write = memory_region_ram_device_write,
1361 .endianness = DEVICE_HOST_ENDIAN,
1362 .valid = {
1363 .min_access_size = 1,
1364 .max_access_size = 8,
1365 .unaligned = true,
1366 },
1367 .impl = {
1368 .min_access_size = 1,
1369 .max_access_size = 8,
1370 .unaligned = true,
1371 },
1372 };
1373
1374 bool memory_region_access_valid(MemoryRegion *mr,
1375 hwaddr addr,
1376 unsigned size,
1377 bool is_write,
1378 MemTxAttrs attrs)
1379 {
1380 if (mr->ops->valid.accepts
1381 && !mr->ops->valid.accepts(mr->opaque, addr, size, is_write, attrs)) {
1382 qemu_log_mask(LOG_GUEST_ERROR, "Invalid %s at addr 0x%" HWADDR_PRIX
1383 ", size %u, region '%s', reason: rejected\n",
1384 is_write ? "write" : "read",
1385 addr, size, memory_region_name(mr));
1386 return false;
1387 }
1388
1389 if (!mr->ops->valid.unaligned && (addr & (size - 1))) {
1390 qemu_log_mask(LOG_GUEST_ERROR, "Invalid %s at addr 0x%" HWADDR_PRIX
1391 ", size %u, region '%s', reason: unaligned\n",
1392 is_write ? "write" : "read",
1393 addr, size, memory_region_name(mr));
1394 return false;
1395 }
1396
1397 /* Treat zero as compatibility all valid */
1398 if (!mr->ops->valid.max_access_size) {
1399 return true;
1400 }
1401
1402 if (size > mr->ops->valid.max_access_size
1403 || size < mr->ops->valid.min_access_size) {
1404 qemu_log_mask(LOG_GUEST_ERROR, "Invalid %s at addr 0x%" HWADDR_PRIX
1405 ", size %u, region '%s', reason: invalid size "
1406 "(min:%u max:%u)\n",
1407 is_write ? "write" : "read",
1408 addr, size, memory_region_name(mr),
1409 mr->ops->valid.min_access_size,
1410 mr->ops->valid.max_access_size);
1411 return false;
1412 }
1413 return true;
1414 }
1415
1416 static MemTxResult memory_region_dispatch_read1(MemoryRegion *mr,
1417 hwaddr addr,
1418 uint64_t *pval,
1419 unsigned size,
1420 MemTxAttrs attrs)
1421 {
1422 *pval = 0;
1423
1424 if (mr->ops->read) {
1425 return access_with_adjusted_size(addr, pval, size,
1426 mr->ops->impl.min_access_size,
1427 mr->ops->impl.max_access_size,
1428 memory_region_read_accessor,
1429 mr, attrs);
1430 } else {
1431 return access_with_adjusted_size(addr, pval, size,
1432 mr->ops->impl.min_access_size,
1433 mr->ops->impl.max_access_size,
1434 memory_region_read_with_attrs_accessor,
1435 mr, attrs);
1436 }
1437 }
1438
1439 MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
1440 hwaddr addr,
1441 uint64_t *pval,
1442 MemOp op,
1443 MemTxAttrs attrs)
1444 {
1445 unsigned size = memop_size(op);
1446 MemTxResult r;
1447
1448 if (mr->alias) {
1449 return memory_region_dispatch_read(mr->alias,
1450 mr->alias_offset + addr,
1451 pval, op, attrs);
1452 }
1453 if (!memory_region_access_valid(mr, addr, size, false, attrs)) {
1454 *pval = unassigned_mem_read(mr, addr, size);
1455 return MEMTX_DECODE_ERROR;
1456 }
1457
1458 r = memory_region_dispatch_read1(mr, addr, pval, size, attrs);
1459 adjust_endianness(mr, pval, op);
1460 return r;
1461 }
1462
1463 /* Return true if an eventfd was signalled */
1464 static bool memory_region_dispatch_write_eventfds(MemoryRegion *mr,
1465 hwaddr addr,
1466 uint64_t data,
1467 unsigned size,
1468 MemTxAttrs attrs)
1469 {
1470 MemoryRegionIoeventfd ioeventfd = {
1471 .addr = addrrange_make(int128_make64(addr), int128_make64(size)),
1472 .data = data,
1473 };
1474 unsigned i;
1475
1476 for (i = 0; i < mr->ioeventfd_nb; i++) {
1477 ioeventfd.match_data = mr->ioeventfds[i].match_data;
1478 ioeventfd.e = mr->ioeventfds[i].e;
1479
1480 if (memory_region_ioeventfd_equal(&ioeventfd, &mr->ioeventfds[i])) {
1481 event_notifier_set(ioeventfd.e);
1482 return true;
1483 }
1484 }
1485
1486 return false;
1487 }
1488
1489 MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
1490 hwaddr addr,
1491 uint64_t data,
1492 MemOp op,
1493 MemTxAttrs attrs)
1494 {
1495 unsigned size = memop_size(op);
1496
1497 if (mr->alias) {
1498 return memory_region_dispatch_write(mr->alias,
1499 mr->alias_offset + addr,
1500 data, op, attrs);
1501 }
1502 if (!memory_region_access_valid(mr, addr, size, true, attrs)) {
1503 unassigned_mem_write(mr, addr, data, size);
1504 return MEMTX_DECODE_ERROR;
1505 }
1506
1507 adjust_endianness(mr, &data, op);
1508
1509 if ((!kvm_eventfds_enabled()) &&
1510 memory_region_dispatch_write_eventfds(mr, addr, data, size, attrs)) {
1511 return MEMTX_OK;
1512 }
1513
1514 if (mr->ops->write) {
1515 return access_with_adjusted_size(addr, &data, size,
1516 mr->ops->impl.min_access_size,
1517 mr->ops->impl.max_access_size,
1518 memory_region_write_accessor, mr,
1519 attrs);
1520 } else {
1521 return
1522 access_with_adjusted_size(addr, &data, size,
1523 mr->ops->impl.min_access_size,
1524 mr->ops->impl.max_access_size,
1525 memory_region_write_with_attrs_accessor,
1526 mr, attrs);
1527 }
1528 }
1529
1530 void memory_region_init_io(MemoryRegion *mr,
1531 Object *owner,
1532 const MemoryRegionOps *ops,
1533 void *opaque,
1534 const char *name,
1535 uint64_t size)
1536 {
1537 memory_region_init(mr, owner, name, size);
1538 mr->ops = ops ? ops : &unassigned_mem_ops;
1539 mr->opaque = opaque;
1540 mr->terminates = true;
1541 }
1542
1543 void memory_region_init_ram_nomigrate(MemoryRegion *mr,
1544 Object *owner,
1545 const char *name,
1546 uint64_t size,
1547 Error **errp)
1548 {
1549 memory_region_init_ram_flags_nomigrate(mr, owner, name, size, 0, errp);
1550 }
1551
1552 void memory_region_init_ram_flags_nomigrate(MemoryRegion *mr,
1553 Object *owner,
1554 const char *name,
1555 uint64_t size,
1556 uint32_t ram_flags,
1557 Error **errp)
1558 {
1559 Error *err = NULL;
1560 memory_region_init(mr, owner, name, size);
1561 mr->ram = true;
1562 mr->terminates = true;
1563 mr->destructor = memory_region_destructor_ram;
1564 mr->ram_block = qemu_ram_alloc(size, ram_flags, mr, &err);
1565 if (err) {
1566 mr->size = int128_zero();
1567 object_unparent(OBJECT(mr));
1568 error_propagate(errp, err);
1569 }
1570 }
1571
1572 void memory_region_init_resizeable_ram(MemoryRegion *mr,
1573 Object *owner,
1574 const char *name,
1575 uint64_t size,
1576 uint64_t max_size,
1577 void (*resized)(const char*,
1578 uint64_t length,
1579 void *host),
1580 Error **errp)
1581 {
1582 Error *err = NULL;
1583 memory_region_init(mr, owner, name, size);
1584 mr->ram = true;
1585 mr->terminates = true;
1586 mr->destructor = memory_region_destructor_ram;
1587 mr->ram_block = qemu_ram_alloc_resizeable(size, max_size, resized,
1588 mr, &err);
1589 if (err) {
1590 mr->size = int128_zero();
1591 object_unparent(OBJECT(mr));
1592 error_propagate(errp, err);
1593 }
1594 }
1595
1596 #ifdef CONFIG_POSIX
1597 void memory_region_init_ram_from_file(MemoryRegion *mr,
1598 Object *owner,
1599 const char *name,
1600 uint64_t size,
1601 uint64_t align,
1602 uint32_t ram_flags,
1603 const char *path,
1604 bool readonly,
1605 Error **errp)
1606 {
1607 Error *err = NULL;
1608 memory_region_init(mr, owner, name, size);
1609 mr->ram = true;
1610 mr->readonly = readonly;
1611 mr->terminates = true;
1612 mr->destructor = memory_region_destructor_ram;
1613 mr->align = align;
1614 mr->ram_block = qemu_ram_alloc_from_file(size, mr, ram_flags, path,
1615 readonly, &err);
1616 if (err) {
1617 mr->size = int128_zero();
1618 object_unparent(OBJECT(mr));
1619 error_propagate(errp, err);
1620 }
1621 }
1622
1623 void memory_region_init_ram_from_fd(MemoryRegion *mr,
1624 Object *owner,
1625 const char *name,
1626 uint64_t size,
1627 uint32_t ram_flags,
1628 int fd,
1629 ram_addr_t offset,
1630 Error **errp)
1631 {
1632 Error *err = NULL;
1633 memory_region_init(mr, owner, name, size);
1634 mr->ram = true;
1635 mr->terminates = true;
1636 mr->destructor = memory_region_destructor_ram;
1637 mr->ram_block = qemu_ram_alloc_from_fd(size, mr, ram_flags, fd, offset,
1638 false, &err);
1639 if (err) {
1640 mr->size = int128_zero();
1641 object_unparent(OBJECT(mr));
1642 error_propagate(errp, err);
1643 }
1644 }
1645 #endif
1646
1647 void memory_region_init_ram_ptr(MemoryRegion *mr,
1648 Object *owner,
1649 const char *name,
1650 uint64_t size,
1651 void *ptr)
1652 {
1653 memory_region_init(mr, owner, name, size);
1654 mr->ram = true;
1655 mr->terminates = true;
1656 mr->destructor = memory_region_destructor_ram;
1657
1658 /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
1659 assert(ptr != NULL);
1660 mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal);
1661 }
1662
1663 void memory_region_init_ram_device_ptr(MemoryRegion *mr,
1664 Object *owner,
1665 const char *name,
1666 uint64_t size,
1667 void *ptr)
1668 {
1669 memory_region_init(mr, owner, name, size);
1670 mr->ram = true;
1671 mr->terminates = true;
1672 mr->ram_device = true;
1673 mr->ops = &ram_device_mem_ops;
1674 mr->opaque = mr;
1675 mr->destructor = memory_region_destructor_ram;
1676
1677 /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
1678 assert(ptr != NULL);
1679 mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal);
1680 }
1681
1682 void memory_region_init_alias(MemoryRegion *mr,
1683 Object *owner,
1684 const char *name,
1685 MemoryRegion *orig,
1686 hwaddr offset,
1687 uint64_t size)
1688 {
1689 memory_region_init(mr, owner, name, size);
1690 mr->alias = orig;
1691 mr->alias_offset = offset;
1692 }
1693
1694 void memory_region_init_rom_nomigrate(MemoryRegion *mr,
1695 Object *owner,
1696 const char *name,
1697 uint64_t size,
1698 Error **errp)
1699 {
1700 memory_region_init_ram_flags_nomigrate(mr, owner, name, size, 0, errp);
1701 mr->readonly = true;
1702 }
1703
1704 void memory_region_init_rom_device_nomigrate(MemoryRegion *mr,
1705 Object *owner,
1706 const MemoryRegionOps *ops,
1707 void *opaque,
1708 const char *name,
1709 uint64_t size,
1710 Error **errp)
1711 {
1712 Error *err = NULL;
1713 assert(ops);
1714 memory_region_init(mr, owner, name, size);
1715 mr->ops = ops;
1716 mr->opaque = opaque;
1717 mr->terminates = true;
1718 mr->rom_device = true;
1719 mr->destructor = memory_region_destructor_ram;
1720 mr->ram_block = qemu_ram_alloc(size, 0, mr, &err);
1721 if (err) {
1722 mr->size = int128_zero();
1723 object_unparent(OBJECT(mr));
1724 error_propagate(errp, err);
1725 }
1726 }
1727
1728 void memory_region_init_iommu(void *_iommu_mr,
1729 size_t instance_size,
1730 const char *mrtypename,
1731 Object *owner,
1732 const char *name,
1733 uint64_t size)
1734 {
1735 struct IOMMUMemoryRegion *iommu_mr;
1736 struct MemoryRegion *mr;
1737
1738 object_initialize(_iommu_mr, instance_size, mrtypename);
1739 mr = MEMORY_REGION(_iommu_mr);
1740 memory_region_do_init(mr, owner, name, size);
1741 iommu_mr = IOMMU_MEMORY_REGION(mr);
1742 mr->terminates = true; /* then re-forwards */
1743 QLIST_INIT(&iommu_mr->iommu_notify);
1744 iommu_mr->iommu_notify_flags = IOMMU_NOTIFIER_NONE;
1745 }
1746
1747 static void memory_region_finalize(Object *obj)
1748 {
1749 MemoryRegion *mr = MEMORY_REGION(obj);
1750
1751 assert(!mr->container);
1752
1753 /* We know the region is not visible in any address space (it
1754 * does not have a container and cannot be a root either because
1755 * it has no references, so we can blindly clear mr->enabled.
1756 * memory_region_set_enabled instead could trigger a transaction
1757 * and cause an infinite loop.
1758 */
1759 mr->enabled = false;
1760 memory_region_transaction_begin();
1761 while (!QTAILQ_EMPTY(&mr->subregions)) {
1762 MemoryRegion *subregion = QTAILQ_FIRST(&mr->subregions);
1763 memory_region_del_subregion(mr, subregion);
1764 }
1765 memory_region_transaction_commit();
1766
1767 mr->destructor(mr);
1768 memory_region_clear_coalescing(mr);
1769 g_free((char *)mr->name);
1770 g_free(mr->ioeventfds);
1771 }
1772
1773 Object *memory_region_owner(MemoryRegion *mr)
1774 {
1775 Object *obj = OBJECT(mr);
1776 return obj->parent;
1777 }
1778
1779 void memory_region_ref(MemoryRegion *mr)
1780 {
1781 /* MMIO callbacks most likely will access data that belongs
1782 * to the owner, hence the need to ref/unref the owner whenever
1783 * the memory region is in use.
1784 *
1785 * The memory region is a child of its owner. As long as the
1786 * owner doesn't call unparent itself on the memory region,
1787 * ref-ing the owner will also keep the memory region alive.
1788 * Memory regions without an owner are supposed to never go away;
1789 * we do not ref/unref them because it slows down DMA sensibly.
1790 */
1791 if (mr && mr->owner) {
1792 object_ref(mr->owner);
1793 }
1794 }
1795
1796 void memory_region_unref(MemoryRegion *mr)
1797 {
1798 if (mr && mr->owner) {
1799 object_unref(mr->owner);
1800 }
1801 }
1802
1803 uint64_t memory_region_size(MemoryRegion *mr)
1804 {
1805 if (int128_eq(mr->size, int128_2_64())) {
1806 return UINT64_MAX;
1807 }
1808 return int128_get64(mr->size);
1809 }
1810
1811 const char *memory_region_name(const MemoryRegion *mr)
1812 {
1813 if (!mr->name) {
1814 ((MemoryRegion *)mr)->name =
1815 g_strdup(object_get_canonical_path_component(OBJECT(mr)));
1816 }
1817 return mr->name;
1818 }
1819
1820 bool memory_region_is_ram_device(MemoryRegion *mr)
1821 {
1822 return mr->ram_device;
1823 }
1824
1825 bool memory_region_is_protected(MemoryRegion *mr)
1826 {
1827 return mr->ram && (mr->ram_block->flags & RAM_PROTECTED);
1828 }
1829
1830 uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr)
1831 {
1832 uint8_t mask = mr->dirty_log_mask;
1833 RAMBlock *rb = mr->ram_block;
1834
1835 if (global_dirty_tracking && ((rb && qemu_ram_is_migratable(rb)) ||
1836 memory_region_is_iommu(mr))) {
1837 mask |= (1 << DIRTY_MEMORY_MIGRATION);
1838 }
1839
1840 if (tcg_enabled() && rb) {
1841 /* TCG only cares about dirty memory logging for RAM, not IOMMU. */
1842 mask |= (1 << DIRTY_MEMORY_CODE);
1843 }
1844 return mask;
1845 }
1846
1847 bool memory_region_is_logging(MemoryRegion *mr, uint8_t client)
1848 {
1849 return memory_region_get_dirty_log_mask(mr) & (1 << client);
1850 }
1851
1852 static int memory_region_update_iommu_notify_flags(IOMMUMemoryRegion *iommu_mr,
1853 Error **errp)
1854 {
1855 IOMMUNotifierFlag flags = IOMMU_NOTIFIER_NONE;
1856 IOMMUNotifier *iommu_notifier;
1857 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
1858 int ret = 0;
1859
1860 IOMMU_NOTIFIER_FOREACH(iommu_notifier, iommu_mr) {
1861 flags |= iommu_notifier->notifier_flags;
1862 }
1863
1864 if (flags != iommu_mr->iommu_notify_flags && imrc->notify_flag_changed) {
1865 ret = imrc->notify_flag_changed(iommu_mr,
1866 iommu_mr->iommu_notify_flags,
1867 flags, errp);
1868 }
1869
1870 if (!ret) {
1871 iommu_mr->iommu_notify_flags = flags;
1872 }
1873 return ret;
1874 }
1875
1876 int memory_region_iommu_set_page_size_mask(IOMMUMemoryRegion *iommu_mr,
1877 uint64_t page_size_mask,
1878 Error **errp)
1879 {
1880 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
1881 int ret = 0;
1882
1883 if (imrc->iommu_set_page_size_mask) {
1884 ret = imrc->iommu_set_page_size_mask(iommu_mr, page_size_mask, errp);
1885 }
1886 return ret;
1887 }
1888
1889 int memory_region_register_iommu_notifier(MemoryRegion *mr,
1890 IOMMUNotifier *n, Error **errp)
1891 {
1892 IOMMUMemoryRegion *iommu_mr;
1893 int ret;
1894
1895 if (mr->alias) {
1896 return memory_region_register_iommu_notifier(mr->alias, n, errp);
1897 }
1898
1899 /* We need to register for at least one bitfield */
1900 iommu_mr = IOMMU_MEMORY_REGION(mr);
1901 assert(n->notifier_flags != IOMMU_NOTIFIER_NONE);
1902 assert(n->start <= n->end);
1903 assert(n->iommu_idx >= 0 &&
1904 n->iommu_idx < memory_region_iommu_num_indexes(iommu_mr));
1905
1906 QLIST_INSERT_HEAD(&iommu_mr->iommu_notify, n, node);
1907 ret = memory_region_update_iommu_notify_flags(iommu_mr, errp);
1908 if (ret) {
1909 QLIST_REMOVE(n, node);
1910 }
1911 return ret;
1912 }
1913
1914 uint64_t memory_region_iommu_get_min_page_size(IOMMUMemoryRegion *iommu_mr)
1915 {
1916 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
1917
1918 if (imrc->get_min_page_size) {
1919 return imrc->get_min_page_size(iommu_mr);
1920 }
1921 return TARGET_PAGE_SIZE;
1922 }
1923
1924 void memory_region_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n)
1925 {
1926 MemoryRegion *mr = MEMORY_REGION(iommu_mr);
1927 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
1928 hwaddr addr, granularity;
1929 IOMMUTLBEntry iotlb;
1930
1931 /* If the IOMMU has its own replay callback, override */
1932 if (imrc->replay) {
1933 imrc->replay(iommu_mr, n);
1934 return;
1935 }
1936
1937 granularity = memory_region_iommu_get_min_page_size(iommu_mr);
1938
1939 for (addr = 0; addr < memory_region_size(mr); addr += granularity) {
1940 iotlb = imrc->translate(iommu_mr, addr, IOMMU_NONE, n->iommu_idx);
1941 if (iotlb.perm != IOMMU_NONE) {
1942 n->notify(n, &iotlb);
1943 }
1944
1945 /* if (2^64 - MR size) < granularity, it's possible to get an
1946 * infinite loop here. This should catch such a wraparound */
1947 if ((addr + granularity) < addr) {
1948 break;
1949 }
1950 }
1951 }
1952
1953 void memory_region_unregister_iommu_notifier(MemoryRegion *mr,
1954 IOMMUNotifier *n)
1955 {
1956 IOMMUMemoryRegion *iommu_mr;
1957
1958 if (mr->alias) {
1959 memory_region_unregister_iommu_notifier(mr->alias, n);
1960 return;
1961 }
1962 QLIST_REMOVE(n, node);
1963 iommu_mr = IOMMU_MEMORY_REGION(mr);
1964 memory_region_update_iommu_notify_flags(iommu_mr, NULL);
1965 }
1966
1967 void memory_region_notify_iommu_one(IOMMUNotifier *notifier,
1968 IOMMUTLBEvent *event)
1969 {
1970 IOMMUTLBEntry *entry = &event->entry;
1971 hwaddr entry_end = entry->iova + entry->addr_mask;
1972 IOMMUTLBEntry tmp = *entry;
1973
1974 if (event->type == IOMMU_NOTIFIER_UNMAP) {
1975 assert(entry->perm == IOMMU_NONE);
1976 }
1977
1978 /*
1979 * Skip the notification if the notification does not overlap
1980 * with registered range.
1981 */
1982 if (notifier->start > entry_end || notifier->end < entry->iova) {
1983 return;
1984 }
1985
1986 if (notifier->notifier_flags & IOMMU_NOTIFIER_DEVIOTLB_UNMAP) {
1987 /* Crop (iova, addr_mask) to range */
1988 tmp.iova = MAX(tmp.iova, notifier->start);
1989 tmp.addr_mask = MIN(entry_end, notifier->end) - tmp.iova;
1990 } else {
1991 assert(entry->iova >= notifier->start && entry_end <= notifier->end);
1992 }
1993
1994 if (event->type & notifier->notifier_flags) {
1995 notifier->notify(notifier, &tmp);
1996 }
1997 }
1998
1999 void memory_region_unmap_iommu_notifier_range(IOMMUNotifier *notifier)
2000 {
2001 IOMMUTLBEvent event;
2002
2003 event.type = IOMMU_NOTIFIER_UNMAP;
2004 event.entry.target_as = &address_space_memory;
2005 event.entry.iova = notifier->start;
2006 event.entry.perm = IOMMU_NONE;
2007 event.entry.addr_mask = notifier->end - notifier->start;
2008
2009 memory_region_notify_iommu_one(notifier, &event);
2010 }
2011
2012 void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr,
2013 int iommu_idx,
2014 IOMMUTLBEvent event)
2015 {
2016 IOMMUNotifier *iommu_notifier;
2017
2018 assert(memory_region_is_iommu(MEMORY_REGION(iommu_mr)));
2019
2020 IOMMU_NOTIFIER_FOREACH(iommu_notifier, iommu_mr) {
2021 if (iommu_notifier->iommu_idx == iommu_idx) {
2022 memory_region_notify_iommu_one(iommu_notifier, &event);
2023 }
2024 }
2025 }
2026
2027 int memory_region_iommu_get_attr(IOMMUMemoryRegion *iommu_mr,
2028 enum IOMMUMemoryRegionAttr attr,
2029 void *data)
2030 {
2031 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
2032
2033 if (!imrc->get_attr) {
2034 return -EINVAL;
2035 }
2036
2037 return imrc->get_attr(iommu_mr, attr, data);
2038 }
2039
2040 int memory_region_iommu_attrs_to_index(IOMMUMemoryRegion *iommu_mr,
2041 MemTxAttrs attrs)
2042 {
2043 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
2044
2045 if (!imrc->attrs_to_index) {
2046 return 0;
2047 }
2048
2049 return imrc->attrs_to_index(iommu_mr, attrs);
2050 }
2051
2052 int memory_region_iommu_num_indexes(IOMMUMemoryRegion *iommu_mr)
2053 {
2054 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
2055
2056 if (!imrc->num_indexes) {
2057 return 1;
2058 }
2059
2060 return imrc->num_indexes(iommu_mr);
2061 }
2062
2063 RamDiscardManager *memory_region_get_ram_discard_manager(MemoryRegion *mr)
2064 {
2065 if (!memory_region_is_mapped(mr) || !memory_region_is_ram(mr)) {
2066 return NULL;
2067 }
2068 return mr->rdm;
2069 }
2070
2071 void memory_region_set_ram_discard_manager(MemoryRegion *mr,
2072 RamDiscardManager *rdm)
2073 {
2074 g_assert(memory_region_is_ram(mr) && !memory_region_is_mapped(mr));
2075 g_assert(!rdm || !mr->rdm);
2076 mr->rdm = rdm;
2077 }
2078
2079 uint64_t ram_discard_manager_get_min_granularity(const RamDiscardManager *rdm,
2080 const MemoryRegion *mr)
2081 {
2082 RamDiscardManagerClass *rdmc = RAM_DISCARD_MANAGER_GET_CLASS(rdm);
2083
2084 g_assert(rdmc->get_min_granularity);
2085 return rdmc->get_min_granularity(rdm, mr);
2086 }
2087
2088 bool ram_discard_manager_is_populated(const RamDiscardManager *rdm,
2089 const MemoryRegionSection *section)
2090 {
2091 RamDiscardManagerClass *rdmc = RAM_DISCARD_MANAGER_GET_CLASS(rdm);
2092
2093 g_assert(rdmc->is_populated);
2094 return rdmc->is_populated(rdm, section);
2095 }
2096
2097 int ram_discard_manager_replay_populated(const RamDiscardManager *rdm,
2098 MemoryRegionSection *section,
2099 ReplayRamPopulate replay_fn,
2100 void *opaque)
2101 {
2102 RamDiscardManagerClass *rdmc = RAM_DISCARD_MANAGER_GET_CLASS(rdm);
2103
2104 g_assert(rdmc->replay_populated);
2105 return rdmc->replay_populated(rdm, section, replay_fn, opaque);
2106 }
2107
2108 void ram_discard_manager_replay_discarded(const RamDiscardManager *rdm,
2109 MemoryRegionSection *section,
2110 ReplayRamDiscard replay_fn,
2111 void *opaque)
2112 {
2113 RamDiscardManagerClass *rdmc = RAM_DISCARD_MANAGER_GET_CLASS(rdm);
2114
2115 g_assert(rdmc->replay_discarded);
2116 rdmc->replay_discarded(rdm, section, replay_fn, opaque);
2117 }
2118
2119 void ram_discard_manager_register_listener(RamDiscardManager *rdm,
2120 RamDiscardListener *rdl,
2121 MemoryRegionSection *section)
2122 {
2123 RamDiscardManagerClass *rdmc = RAM_DISCARD_MANAGER_GET_CLASS(rdm);
2124
2125 g_assert(rdmc->register_listener);
2126 rdmc->register_listener(rdm, rdl, section);
2127 }
2128
2129 void ram_discard_manager_unregister_listener(RamDiscardManager *rdm,
2130 RamDiscardListener *rdl)
2131 {
2132 RamDiscardManagerClass *rdmc = RAM_DISCARD_MANAGER_GET_CLASS(rdm);
2133
2134 g_assert(rdmc->unregister_listener);
2135 rdmc->unregister_listener(rdm, rdl);
2136 }
2137
2138 /* Called with rcu_read_lock held. */
2139 bool memory_get_xlat_addr(IOMMUTLBEntry *iotlb, void **vaddr,
2140 ram_addr_t *ram_addr, bool *read_only,
2141 bool *mr_has_discard_manager)
2142 {
2143 MemoryRegion *mr;
2144 hwaddr xlat;
2145 hwaddr len = iotlb->addr_mask + 1;
2146 bool writable = iotlb->perm & IOMMU_WO;
2147
2148 if (mr_has_discard_manager) {
2149 *mr_has_discard_manager = false;
2150 }
2151 /*
2152 * The IOMMU TLB entry we have just covers translation through
2153 * this IOMMU to its immediate target. We need to translate
2154 * it the rest of the way through to memory.
2155 */
2156 mr = address_space_translate(&address_space_memory, iotlb->translated_addr,
2157 &xlat, &len, writable, MEMTXATTRS_UNSPECIFIED);
2158 if (!memory_region_is_ram(mr)) {
2159 error_report("iommu map to non memory area %" HWADDR_PRIx "", xlat);
2160 return false;
2161 } else if (memory_region_has_ram_discard_manager(mr)) {
2162 RamDiscardManager *rdm = memory_region_get_ram_discard_manager(mr);
2163 MemoryRegionSection tmp = {
2164 .mr = mr,
2165 .offset_within_region = xlat,
2166 .size = int128_make64(len),
2167 };
2168 if (mr_has_discard_manager) {
2169 *mr_has_discard_manager = true;
2170 }
2171 /*
2172 * Malicious VMs can map memory into the IOMMU, which is expected
2173 * to remain discarded. vfio will pin all pages, populating memory.
2174 * Disallow that. vmstate priorities make sure any RamDiscardManager
2175 * were already restored before IOMMUs are restored.
2176 */
2177 if (!ram_discard_manager_is_populated(rdm, &tmp)) {
2178 error_report("iommu map to discarded memory (e.g., unplugged via"
2179 " virtio-mem): %" HWADDR_PRIx "",
2180 iotlb->translated_addr);
2181 return false;
2182 }
2183 }
2184
2185 /*
2186 * Translation truncates length to the IOMMU page size,
2187 * check that it did not truncate too much.
2188 */
2189 if (len & iotlb->addr_mask) {
2190 error_report("iommu has granularity incompatible with target AS");
2191 return false;
2192 }
2193
2194 if (vaddr) {
2195 *vaddr = memory_region_get_ram_ptr(mr) + xlat;
2196 }
2197
2198 if (ram_addr) {
2199 *ram_addr = memory_region_get_ram_addr(mr) + xlat;
2200 }
2201
2202 if (read_only) {
2203 *read_only = !writable || mr->readonly;
2204 }
2205
2206 return true;
2207 }
2208
2209 void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
2210 {
2211 uint8_t mask = 1 << client;
2212 uint8_t old_logging;
2213
2214 assert(client == DIRTY_MEMORY_VGA);
2215 old_logging = mr->vga_logging_count;
2216 mr->vga_logging_count += log ? 1 : -1;
2217 if (!!old_logging == !!mr->vga_logging_count) {
2218 return;
2219 }
2220
2221 memory_region_transaction_begin();
2222 mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask);
2223 memory_region_update_pending |= mr->enabled;
2224 memory_region_transaction_commit();
2225 }
2226
2227 void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
2228 hwaddr size)
2229 {
2230 assert(mr->ram_block);
2231 cpu_physical_memory_set_dirty_range(memory_region_get_ram_addr(mr) + addr,
2232 size,
2233 memory_region_get_dirty_log_mask(mr));
2234 }
2235
2236 /*
2237 * If memory region `mr' is NULL, do global sync. Otherwise, sync
2238 * dirty bitmap for the specified memory region.
2239 */
2240 static void memory_region_sync_dirty_bitmap(MemoryRegion *mr)
2241 {
2242 MemoryListener *listener;
2243 AddressSpace *as;
2244 FlatView *view;
2245 FlatRange *fr;
2246
2247 /* If the same address space has multiple log_sync listeners, we
2248 * visit that address space's FlatView multiple times. But because
2249 * log_sync listeners are rare, it's still cheaper than walking each
2250 * address space once.
2251 */
2252 QTAILQ_FOREACH(listener, &memory_listeners, link) {
2253 if (listener->log_sync) {
2254 as = listener->address_space;
2255 view = address_space_get_flatview(as);
2256 FOR_EACH_FLAT_RANGE(fr, view) {
2257 if (fr->dirty_log_mask && (!mr || fr->mr == mr)) {
2258 MemoryRegionSection mrs = section_from_flat_range(fr, view);
2259 listener->log_sync(listener, &mrs);
2260 }
2261 }
2262 flatview_unref(view);
2263 trace_memory_region_sync_dirty(mr ? mr->name : "(all)", listener->name, 0);
2264 } else if (listener->log_sync_global) {
2265 /*
2266 * No matter whether MR is specified, what we can do here
2267 * is to do a global sync, because we are not capable to
2268 * sync in a finer granularity.
2269 */
2270 listener->log_sync_global(listener);
2271 trace_memory_region_sync_dirty(mr ? mr->name : "(all)", listener->name, 1);
2272 }
2273 }
2274 }
2275
2276 void memory_region_clear_dirty_bitmap(MemoryRegion *mr, hwaddr start,
2277 hwaddr len)
2278 {
2279 MemoryRegionSection mrs;
2280 MemoryListener *listener;
2281 AddressSpace *as;
2282 FlatView *view;
2283 FlatRange *fr;
2284 hwaddr sec_start, sec_end, sec_size;
2285
2286 QTAILQ_FOREACH(listener, &memory_listeners, link) {
2287 if (!listener->log_clear) {
2288 continue;
2289 }
2290 as = listener->address_space;
2291 view = address_space_get_flatview(as);
2292 FOR_EACH_FLAT_RANGE(fr, view) {
2293 if (!fr->dirty_log_mask || fr->mr != mr) {
2294 /*
2295 * Clear dirty bitmap operation only applies to those
2296 * regions whose dirty logging is at least enabled
2297 */
2298 continue;
2299 }
2300
2301 mrs = section_from_flat_range(fr, view);
2302
2303 sec_start = MAX(mrs.offset_within_region, start);
2304 sec_end = mrs.offset_within_region + int128_get64(mrs.size);
2305 sec_end = MIN(sec_end, start + len);
2306
2307 if (sec_start >= sec_end) {
2308 /*
2309 * If this memory region section has no intersection
2310 * with the requested range, skip.
2311 */
2312 continue;
2313 }
2314
2315 /* Valid case; shrink the section if needed */
2316 mrs.offset_within_address_space +=
2317 sec_start - mrs.offset_within_region;
2318 mrs.offset_within_region = sec_start;
2319 sec_size = sec_end - sec_start;
2320 mrs.size = int128_make64(sec_size);
2321 listener->log_clear(listener, &mrs);
2322 }
2323 flatview_unref(view);
2324 }
2325 }
2326
2327 DirtyBitmapSnapshot *memory_region_snapshot_and_clear_dirty(MemoryRegion *mr,
2328 hwaddr addr,
2329 hwaddr size,
2330 unsigned client)
2331 {
2332 DirtyBitmapSnapshot *snapshot;
2333 assert(mr->ram_block);
2334 memory_region_sync_dirty_bitmap(mr);
2335 snapshot = cpu_physical_memory_snapshot_and_clear_dirty(mr, addr, size, client);
2336 memory_global_after_dirty_log_sync();
2337 return snapshot;
2338 }
2339
2340 bool memory_region_snapshot_get_dirty(MemoryRegion *mr, DirtyBitmapSnapshot *snap,
2341 hwaddr addr, hwaddr size)
2342 {
2343 assert(mr->ram_block);
2344 return cpu_physical_memory_snapshot_get_dirty(snap,
2345 memory_region_get_ram_addr(mr) + addr, size);
2346 }
2347
2348 void memory_region_set_readonly(MemoryRegion *mr, bool readonly)
2349 {
2350 if (mr->readonly != readonly) {
2351 memory_region_transaction_begin();
2352 mr->readonly = readonly;
2353 memory_region_update_pending |= mr->enabled;
2354 memory_region_transaction_commit();
2355 }
2356 }
2357
2358 void memory_region_set_nonvolatile(MemoryRegion *mr, bool nonvolatile)
2359 {
2360 if (mr->nonvolatile != nonvolatile) {
2361 memory_region_transaction_begin();
2362 mr->nonvolatile = nonvolatile;
2363 memory_region_update_pending |= mr->enabled;
2364 memory_region_transaction_commit();
2365 }
2366 }
2367
2368 void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode)
2369 {
2370 if (mr->romd_mode != romd_mode) {
2371 memory_region_transaction_begin();
2372 mr->romd_mode = romd_mode;
2373 memory_region_update_pending |= mr->enabled;
2374 memory_region_transaction_commit();
2375 }
2376 }
2377
2378 void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
2379 hwaddr size, unsigned client)
2380 {
2381 assert(mr->ram_block);
2382 cpu_physical_memory_test_and_clear_dirty(
2383 memory_region_get_ram_addr(mr) + addr, size, client);
2384 }
2385
2386 int memory_region_get_fd(MemoryRegion *mr)
2387 {
2388 RCU_READ_LOCK_GUARD();
2389 while (mr->alias) {
2390 mr = mr->alias;
2391 }
2392 return mr->ram_block->fd;
2393 }
2394
2395 void *memory_region_get_ram_ptr(MemoryRegion *mr)
2396 {
2397 uint64_t offset = 0;
2398
2399 RCU_READ_LOCK_GUARD();
2400 while (mr->alias) {
2401 offset += mr->alias_offset;
2402 mr = mr->alias;
2403 }
2404 assert(mr->ram_block);
2405 return qemu_map_ram_ptr(mr->ram_block, offset);
2406 }
2407
2408 MemoryRegion *memory_region_from_host(void *ptr, ram_addr_t *offset)
2409 {
2410 RAMBlock *block;
2411
2412 block = qemu_ram_block_from_host(ptr, false, offset);
2413 if (!block) {
2414 return NULL;
2415 }
2416
2417 return block->mr;
2418 }
2419
2420 ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr)
2421 {
2422 return mr->ram_block ? mr->ram_block->offset : RAM_ADDR_INVALID;
2423 }
2424
2425 void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, Error **errp)
2426 {
2427 assert(mr->ram_block);
2428
2429 qemu_ram_resize(mr->ram_block, newsize, errp);
2430 }
2431
2432 void memory_region_msync(MemoryRegion *mr, hwaddr addr, hwaddr size)
2433 {
2434 if (mr->ram_block) {
2435 qemu_ram_msync(mr->ram_block, addr, size);
2436 }
2437 }
2438
2439 void memory_region_writeback(MemoryRegion *mr, hwaddr addr, hwaddr size)
2440 {
2441 /*
2442 * Might be extended case needed to cover
2443 * different types of memory regions
2444 */
2445 if (mr->dirty_log_mask) {
2446 memory_region_msync(mr, addr, size);
2447 }
2448 }
2449
2450 /*
2451 * Call proper memory listeners about the change on the newly
2452 * added/removed CoalescedMemoryRange.
2453 */
2454 static void memory_region_update_coalesced_range(MemoryRegion *mr,
2455 CoalescedMemoryRange *cmr,
2456 bool add)
2457 {
2458 AddressSpace *as;
2459 FlatView *view;
2460 FlatRange *fr;
2461
2462 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
2463 view = address_space_get_flatview(as);
2464 FOR_EACH_FLAT_RANGE(fr, view) {
2465 if (fr->mr == mr) {
2466 flat_range_coalesced_io_notify(fr, as, cmr, add);
2467 }
2468 }
2469 flatview_unref(view);
2470 }
2471 }
2472
2473 void memory_region_set_coalescing(MemoryRegion *mr)
2474 {
2475 memory_region_clear_coalescing(mr);
2476 memory_region_add_coalescing(mr, 0, int128_get64(mr->size));
2477 }
2478
2479 void memory_region_add_coalescing(MemoryRegion *mr,
2480 hwaddr offset,
2481 uint64_t size)
2482 {
2483 CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr));
2484
2485 cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size));
2486 QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link);
2487 memory_region_update_coalesced_range(mr, cmr, true);
2488 memory_region_set_flush_coalesced(mr);
2489 }
2490
2491 void memory_region_clear_coalescing(MemoryRegion *mr)
2492 {
2493 CoalescedMemoryRange *cmr;
2494
2495 if (QTAILQ_EMPTY(&mr->coalesced)) {
2496 return;
2497 }
2498
2499 qemu_flush_coalesced_mmio_buffer();
2500 mr->flush_coalesced_mmio = false;
2501
2502 while (!QTAILQ_EMPTY(&mr->coalesced)) {
2503 cmr = QTAILQ_FIRST(&mr->coalesced);
2504 QTAILQ_REMOVE(&mr->coalesced, cmr, link);
2505 memory_region_update_coalesced_range(mr, cmr, false);
2506 g_free(cmr);
2507 }
2508 }
2509
2510 void memory_region_set_flush_coalesced(MemoryRegion *mr)
2511 {
2512 mr->flush_coalesced_mmio = true;
2513 }
2514
2515 void memory_region_clear_flush_coalesced(MemoryRegion *mr)
2516 {
2517 qemu_flush_coalesced_mmio_buffer();
2518 if (QTAILQ_EMPTY(&mr->coalesced)) {
2519 mr->flush_coalesced_mmio = false;
2520 }
2521 }
2522
2523 static bool userspace_eventfd_warning;
2524
2525 void memory_region_add_eventfd(MemoryRegion *mr,
2526 hwaddr addr,
2527 unsigned size,
2528 bool match_data,
2529 uint64_t data,
2530 EventNotifier *e)
2531 {
2532 MemoryRegionIoeventfd mrfd = {
2533 .addr.start = int128_make64(addr),
2534 .addr.size = int128_make64(size),
2535 .match_data = match_data,
2536 .data = data,
2537 .e = e,
2538 };
2539 unsigned i;
2540
2541 if (kvm_enabled() && (!(kvm_eventfds_enabled() ||
2542 userspace_eventfd_warning))) {
2543 userspace_eventfd_warning = true;
2544 error_report("Using eventfd without MMIO binding in KVM. "
2545 "Suboptimal performance expected");
2546 }
2547
2548 if (size) {
2549 adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE);
2550 }
2551 memory_region_transaction_begin();
2552 for (i = 0; i < mr->ioeventfd_nb; ++i) {
2553 if (memory_region_ioeventfd_before(&mrfd, &mr->ioeventfds[i])) {
2554 break;
2555 }
2556 }
2557 ++mr->ioeventfd_nb;
2558 mr->ioeventfds = g_realloc(mr->ioeventfds,
2559 sizeof(*mr->ioeventfds) * mr->ioeventfd_nb);
2560 memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i],
2561 sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i));
2562 mr->ioeventfds[i] = mrfd;
2563 ioeventfd_update_pending |= mr->enabled;
2564 memory_region_transaction_commit();
2565 }
2566
2567 void memory_region_del_eventfd(MemoryRegion *mr,
2568 hwaddr addr,
2569 unsigned size,
2570 bool match_data,
2571 uint64_t data,
2572 EventNotifier *e)
2573 {
2574 MemoryRegionIoeventfd mrfd = {
2575 .addr.start = int128_make64(addr),
2576 .addr.size = int128_make64(size),
2577 .match_data = match_data,
2578 .data = data,
2579 .e = e,
2580 };
2581 unsigned i;
2582
2583 if (size) {
2584 adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE);
2585 }
2586 memory_region_transaction_begin();
2587 for (i = 0; i < mr->ioeventfd_nb; ++i) {
2588 if (memory_region_ioeventfd_equal(&mrfd, &mr->ioeventfds[i])) {
2589 break;
2590 }
2591 }
2592 assert(i != mr->ioeventfd_nb);
2593 memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1],
2594 sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1)));
2595 --mr->ioeventfd_nb;
2596 mr->ioeventfds = g_realloc(mr->ioeventfds,
2597 sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1);
2598 ioeventfd_update_pending |= mr->enabled;
2599 memory_region_transaction_commit();
2600 }
2601
2602 static void memory_region_update_container_subregions(MemoryRegion *subregion)
2603 {
2604 MemoryRegion *mr = subregion->container;
2605 MemoryRegion *other;
2606
2607 memory_region_transaction_begin();
2608
2609 memory_region_ref(subregion);
2610 QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
2611 if (subregion->priority >= other->priority) {
2612 QTAILQ_INSERT_BEFORE(other, subregion, subregions_link);
2613 goto done;
2614 }
2615 }
2616 QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link);
2617 done:
2618 memory_region_update_pending |= mr->enabled && subregion->enabled;
2619 memory_region_transaction_commit();
2620 }
2621
2622 static void memory_region_add_subregion_common(MemoryRegion *mr,
2623 hwaddr offset,
2624 MemoryRegion *subregion)
2625 {
2626 MemoryRegion *alias;
2627
2628 assert(!subregion->container);
2629 subregion->container = mr;
2630 for (alias = subregion->alias; alias; alias = alias->alias) {
2631 alias->mapped_via_alias++;
2632 }
2633 subregion->addr = offset;
2634 memory_region_update_container_subregions(subregion);
2635 }
2636
2637 void memory_region_add_subregion(MemoryRegion *mr,
2638 hwaddr offset,
2639 MemoryRegion *subregion)
2640 {
2641 subregion->priority = 0;
2642 memory_region_add_subregion_common(mr, offset, subregion);
2643 }
2644
2645 void memory_region_add_subregion_overlap(MemoryRegion *mr,
2646 hwaddr offset,
2647 MemoryRegion *subregion,
2648 int priority)
2649 {
2650 subregion->priority = priority;
2651 memory_region_add_subregion_common(mr, offset, subregion);
2652 }
2653
2654 void memory_region_del_subregion(MemoryRegion *mr,
2655 MemoryRegion *subregion)
2656 {
2657 MemoryRegion *alias;
2658
2659 memory_region_transaction_begin();
2660 assert(subregion->container == mr);
2661 subregion->container = NULL;
2662 for (alias = subregion->alias; alias; alias = alias->alias) {
2663 alias->mapped_via_alias--;
2664 assert(alias->mapped_via_alias >= 0);
2665 }
2666 QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link);
2667 memory_region_unref(subregion);
2668 memory_region_update_pending |= mr->enabled && subregion->enabled;
2669 memory_region_transaction_commit();
2670 }
2671
2672 void memory_region_set_enabled(MemoryRegion *mr, bool enabled)
2673 {
2674 if (enabled == mr->enabled) {
2675 return;
2676 }
2677 memory_region_transaction_begin();
2678 mr->enabled = enabled;
2679 memory_region_update_pending = true;
2680 memory_region_transaction_commit();
2681 }
2682
2683 void memory_region_set_size(MemoryRegion *mr, uint64_t size)
2684 {
2685 Int128 s = int128_make64(size);
2686
2687 if (size == UINT64_MAX) {
2688 s = int128_2_64();
2689 }
2690 if (int128_eq(s, mr->size)) {
2691 return;
2692 }
2693 memory_region_transaction_begin();
2694 mr->size = s;
2695 memory_region_update_pending = true;
2696 memory_region_transaction_commit();
2697 }
2698
2699 static void memory_region_readd_subregion(MemoryRegion *mr)
2700 {
2701 MemoryRegion *container = mr->container;
2702
2703 if (container) {
2704 memory_region_transaction_begin();
2705 memory_region_ref(mr);
2706 memory_region_del_subregion(container, mr);
2707 memory_region_add_subregion_common(container, mr->addr, mr);
2708 memory_region_unref(mr);
2709 memory_region_transaction_commit();
2710 }
2711 }
2712
2713 void memory_region_set_address(MemoryRegion *mr, hwaddr addr)
2714 {
2715 if (addr != mr->addr) {
2716 mr->addr = addr;
2717 memory_region_readd_subregion(mr);
2718 }
2719 }
2720
2721 void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset)
2722 {
2723 assert(mr->alias);
2724
2725 if (offset == mr->alias_offset) {
2726 return;
2727 }
2728
2729 memory_region_transaction_begin();
2730 mr->alias_offset = offset;
2731 memory_region_update_pending |= mr->enabled;
2732 memory_region_transaction_commit();
2733 }
2734
2735 uint64_t memory_region_get_alignment(const MemoryRegion *mr)
2736 {
2737 return mr->align;
2738 }
2739
2740 static int cmp_flatrange_addr(const void *addr_, const void *fr_)
2741 {
2742 const AddrRange *addr = addr_;
2743 const FlatRange *fr = fr_;
2744
2745 if (int128_le(addrrange_end(*addr), fr->addr.start)) {
2746 return -1;
2747 } else if (int128_ge(addr->start, addrrange_end(fr->addr))) {
2748 return 1;
2749 }
2750 return 0;
2751 }
2752
2753 static FlatRange *flatview_lookup(FlatView *view, AddrRange addr)
2754 {
2755 return bsearch(&addr, view->ranges, view->nr,
2756 sizeof(FlatRange), cmp_flatrange_addr);
2757 }
2758
2759 bool memory_region_is_mapped(MemoryRegion *mr)
2760 {
2761 return !!mr->container || mr->mapped_via_alias;
2762 }
2763
2764 /* Same as memory_region_find, but it does not add a reference to the
2765 * returned region. It must be called from an RCU critical section.
2766 */
2767 static MemoryRegionSection memory_region_find_rcu(MemoryRegion *mr,
2768 hwaddr addr, uint64_t size)
2769 {
2770 MemoryRegionSection ret = { .mr = NULL };
2771 MemoryRegion *root;
2772 AddressSpace *as;
2773 AddrRange range;
2774 FlatView *view;
2775 FlatRange *fr;
2776
2777 addr += mr->addr;
2778 for (root = mr; root->container; ) {
2779 root = root->container;
2780 addr += root->addr;
2781 }
2782
2783 as = memory_region_to_address_space(root);
2784 if (!as) {
2785 return ret;
2786 }
2787 range = addrrange_make(int128_make64(addr), int128_make64(size));
2788
2789 view = address_space_to_flatview(as);
2790 fr = flatview_lookup(view, range);
2791 if (!fr) {
2792 return ret;
2793 }
2794
2795 while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) {
2796 --fr;
2797 }
2798
2799 ret.mr = fr->mr;
2800 ret.fv = view;
2801 range = addrrange_intersection(range, fr->addr);
2802 ret.offset_within_region = fr->offset_in_region;
2803 ret.offset_within_region += int128_get64(int128_sub(range.start,
2804 fr->addr.start));
2805 ret.size = range.size;
2806 ret.offset_within_address_space = int128_get64(range.start);
2807 ret.readonly = fr->readonly;
2808 ret.nonvolatile = fr->nonvolatile;
2809 return ret;
2810 }
2811
2812 MemoryRegionSection memory_region_find(MemoryRegion *mr,
2813 hwaddr addr, uint64_t size)
2814 {
2815 MemoryRegionSection ret;
2816 RCU_READ_LOCK_GUARD();
2817 ret = memory_region_find_rcu(mr, addr, size);
2818 if (ret.mr) {
2819 memory_region_ref(ret.mr);
2820 }
2821 return ret;
2822 }
2823
2824 MemoryRegionSection *memory_region_section_new_copy(MemoryRegionSection *s)
2825 {
2826 MemoryRegionSection *tmp = g_new(MemoryRegionSection, 1);
2827
2828 *tmp = *s;
2829 if (tmp->mr) {
2830 memory_region_ref(tmp->mr);
2831 }
2832 if (tmp->fv) {
2833 bool ret = flatview_ref(tmp->fv);
2834
2835 g_assert(ret);
2836 }
2837 return tmp;
2838 }
2839
2840 void memory_region_section_free_copy(MemoryRegionSection *s)
2841 {
2842 if (s->fv) {
2843 flatview_unref(s->fv);
2844 }
2845 if (s->mr) {
2846 memory_region_unref(s->mr);
2847 }
2848 g_free(s);
2849 }
2850
2851 bool memory_region_present(MemoryRegion *container, hwaddr addr)
2852 {
2853 MemoryRegion *mr;
2854
2855 RCU_READ_LOCK_GUARD();
2856 mr = memory_region_find_rcu(container, addr, 1).mr;
2857 return mr && mr != container;
2858 }
2859
2860 void memory_global_dirty_log_sync(void)
2861 {
2862 memory_region_sync_dirty_bitmap(NULL);
2863 }
2864
2865 void memory_global_after_dirty_log_sync(void)
2866 {
2867 MEMORY_LISTENER_CALL_GLOBAL(log_global_after_sync, Forward);
2868 }
2869
2870 /*
2871 * Dirty track stop flags that are postponed due to VM being stopped. Should
2872 * only be used within vmstate_change hook.
2873 */
2874 static unsigned int postponed_stop_flags;
2875 static VMChangeStateEntry *vmstate_change;
2876 static void memory_global_dirty_log_stop_postponed_run(void);
2877
2878 void memory_global_dirty_log_start(unsigned int flags)
2879 {
2880 unsigned int old_flags;
2881
2882 assert(flags && !(flags & (~GLOBAL_DIRTY_MASK)));
2883
2884 if (vmstate_change) {
2885 /* If there is postponed stop(), operate on it first */
2886 postponed_stop_flags &= ~flags;
2887 memory_global_dirty_log_stop_postponed_run();
2888 }
2889
2890 flags &= ~global_dirty_tracking;
2891 if (!flags) {
2892 return;
2893 }
2894
2895 old_flags = global_dirty_tracking;
2896 global_dirty_tracking |= flags;
2897 trace_global_dirty_changed(global_dirty_tracking);
2898
2899 if (!old_flags) {
2900 MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward);
2901 memory_region_transaction_begin();
2902 memory_region_update_pending = true;
2903 memory_region_transaction_commit();
2904 }
2905 }
2906
2907 static void memory_global_dirty_log_do_stop(unsigned int flags)
2908 {
2909 assert(flags && !(flags & (~GLOBAL_DIRTY_MASK)));
2910 assert((global_dirty_tracking & flags) == flags);
2911 global_dirty_tracking &= ~flags;
2912
2913 trace_global_dirty_changed(global_dirty_tracking);
2914
2915 if (!global_dirty_tracking) {
2916 memory_region_transaction_begin();
2917 memory_region_update_pending = true;
2918 memory_region_transaction_commit();
2919 MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse);
2920 }
2921 }
2922
2923 /*
2924 * Execute the postponed dirty log stop operations if there is, then reset
2925 * everything (including the flags and the vmstate change hook).
2926 */
2927 static void memory_global_dirty_log_stop_postponed_run(void)
2928 {
2929 /* This must be called with the vmstate handler registered */
2930 assert(vmstate_change);
2931
2932 /* Note: postponed_stop_flags can be cleared in log start routine */
2933 if (postponed_stop_flags) {
2934 memory_global_dirty_log_do_stop(postponed_stop_flags);
2935 postponed_stop_flags = 0;
2936 }
2937
2938 qemu_del_vm_change_state_handler(vmstate_change);
2939 vmstate_change = NULL;
2940 }
2941
2942 static void memory_vm_change_state_handler(void *opaque, bool running,
2943 RunState state)
2944 {
2945 if (running) {
2946 memory_global_dirty_log_stop_postponed_run();
2947 }
2948 }
2949
2950 void memory_global_dirty_log_stop(unsigned int flags)
2951 {
2952 if (!runstate_is_running()) {
2953 /* Postpone the dirty log stop, e.g., to when VM starts again */
2954 if (vmstate_change) {
2955 /* Batch with previous postponed flags */
2956 postponed_stop_flags |= flags;
2957 } else {
2958 postponed_stop_flags = flags;
2959 vmstate_change = qemu_add_vm_change_state_handler(
2960 memory_vm_change_state_handler, NULL);
2961 }
2962 return;
2963 }
2964
2965 memory_global_dirty_log_do_stop(flags);
2966 }
2967
2968 static void listener_add_address_space(MemoryListener *listener,
2969 AddressSpace *as)
2970 {
2971 FlatView *view;
2972 FlatRange *fr;
2973
2974 if (listener->begin) {
2975 listener->begin(listener);
2976 }
2977 if (global_dirty_tracking) {
2978 if (listener->log_global_start) {
2979 listener->log_global_start(listener);
2980 }
2981 }
2982
2983 view = address_space_get_flatview(as);
2984 FOR_EACH_FLAT_RANGE(fr, view) {
2985 MemoryRegionSection section = section_from_flat_range(fr, view);
2986
2987 if (listener->region_add) {
2988 listener->region_add(listener, &section);
2989 }
2990 if (fr->dirty_log_mask && listener->log_start) {
2991 listener->log_start(listener, &section, 0, fr->dirty_log_mask);
2992 }
2993 }
2994 if (listener->commit) {
2995 listener->commit(listener);
2996 }
2997 flatview_unref(view);
2998 }
2999
3000 static void listener_del_address_space(MemoryListener *listener,
3001 AddressSpace *as)
3002 {
3003 FlatView *view;
3004 FlatRange *fr;
3005
3006 if (listener->begin) {
3007 listener->begin(listener);
3008 }
3009 view = address_space_get_flatview(as);
3010 FOR_EACH_FLAT_RANGE(fr, view) {
3011 MemoryRegionSection section = section_from_flat_range(fr, view);
3012
3013 if (fr->dirty_log_mask && listener->log_stop) {
3014 listener->log_stop(listener, &section, fr->dirty_log_mask, 0);
3015 }
3016 if (listener->region_del) {
3017 listener->region_del(listener, &section);
3018 }
3019 }
3020 if (listener->commit) {
3021 listener->commit(listener);
3022 }
3023 flatview_unref(view);
3024 }
3025
3026 void memory_listener_register(MemoryListener *listener, AddressSpace *as)
3027 {
3028 MemoryListener *other = NULL;
3029
3030 /* Only one of them can be defined for a listener */
3031 assert(!(listener->log_sync && listener->log_sync_global));
3032
3033 listener->address_space = as;
3034 if (QTAILQ_EMPTY(&memory_listeners)
3035 || listener->priority >= QTAILQ_LAST(&memory_listeners)->priority) {
3036 QTAILQ_INSERT_TAIL(&memory_listeners, listener, link);
3037 } else {
3038 QTAILQ_FOREACH(other, &memory_listeners, link) {
3039 if (listener->priority < other->priority) {
3040 break;
3041 }
3042 }
3043 QTAILQ_INSERT_BEFORE(other, listener, link);
3044 }
3045
3046 if (QTAILQ_EMPTY(&as->listeners)
3047 || listener->priority >= QTAILQ_LAST(&as->listeners)->priority) {
3048 QTAILQ_INSERT_TAIL(&as->listeners, listener, link_as);
3049 } else {
3050 QTAILQ_FOREACH(other, &as->listeners, link_as) {
3051 if (listener->priority < other->priority) {
3052 break;
3053 }
3054 }
3055 QTAILQ_INSERT_BEFORE(other, listener, link_as);
3056 }
3057
3058 listener_add_address_space(listener, as);
3059 }
3060
3061 void memory_listener_unregister(MemoryListener *listener)
3062 {
3063 if (!listener->address_space) {
3064 return;
3065 }
3066
3067 listener_del_address_space(listener, listener->address_space);
3068 QTAILQ_REMOVE(&memory_listeners, listener, link);
3069 QTAILQ_REMOVE(&listener->address_space->listeners, listener, link_as);
3070 listener->address_space = NULL;
3071 }
3072
3073 void address_space_remove_listeners(AddressSpace *as)
3074 {
3075 while (!QTAILQ_EMPTY(&as->listeners)) {
3076 memory_listener_unregister(QTAILQ_FIRST(&as->listeners));
3077 }
3078 }
3079
3080 void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name)
3081 {
3082 memory_region_ref(root);
3083 as->root = root;
3084 as->current_map = NULL;
3085 as->ioeventfd_nb = 0;
3086 as->ioeventfds = NULL;
3087 QTAILQ_INIT(&as->listeners);
3088 QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link);
3089 as->name = g_strdup(name ? name : "anonymous");
3090 address_space_update_topology(as);
3091 address_space_update_ioeventfds(as);
3092 }
3093
3094 static void do_address_space_destroy(AddressSpace *as)
3095 {
3096 assert(QTAILQ_EMPTY(&as->listeners));
3097
3098 flatview_unref(as->current_map);
3099 g_free(as->name);
3100 g_free(as->ioeventfds);
3101 memory_region_unref(as->root);
3102 }
3103
3104 void address_space_destroy(AddressSpace *as)
3105 {
3106 MemoryRegion *root = as->root;
3107
3108 /* Flush out anything from MemoryListeners listening in on this */
3109 memory_region_transaction_begin();
3110 as->root = NULL;
3111 memory_region_transaction_commit();
3112 QTAILQ_REMOVE(&address_spaces, as, address_spaces_link);
3113
3114 /* At this point, as->dispatch and as->current_map are dummy
3115 * entries that the guest should never use. Wait for the old
3116 * values to expire before freeing the data.
3117 */
3118 as->root = root;
3119 call_rcu(as, do_address_space_destroy, rcu);
3120 }
3121
3122 static const char *memory_region_type(MemoryRegion *mr)
3123 {
3124 if (mr->alias) {
3125 return memory_region_type(mr->alias);
3126 }
3127 if (memory_region_is_ram_device(mr)) {
3128 return "ramd";
3129 } else if (memory_region_is_romd(mr)) {
3130 return "romd";
3131 } else if (memory_region_is_rom(mr)) {
3132 return "rom";
3133 } else if (memory_region_is_ram(mr)) {
3134 return "ram";
3135 } else {
3136 return "i/o";
3137 }
3138 }
3139
3140 typedef struct MemoryRegionList MemoryRegionList;
3141
3142 struct MemoryRegionList {
3143 const MemoryRegion *mr;
3144 QTAILQ_ENTRY(MemoryRegionList) mrqueue;
3145 };
3146
3147 typedef QTAILQ_HEAD(, MemoryRegionList) MemoryRegionListHead;
3148
3149 #define MR_SIZE(size) (int128_nz(size) ? (hwaddr)int128_get64( \
3150 int128_sub((size), int128_one())) : 0)
3151 #define MTREE_INDENT " "
3152
3153 static void mtree_expand_owner(const char *label, Object *obj)
3154 {
3155 DeviceState *dev = (DeviceState *) object_dynamic_cast(obj, TYPE_DEVICE);
3156
3157 qemu_printf(" %s:{%s", label, dev ? "dev" : "obj");
3158 if (dev && dev->id) {
3159 qemu_printf(" id=%s", dev->id);
3160 } else {
3161 char *canonical_path = object_get_canonical_path(obj);
3162 if (canonical_path) {
3163 qemu_printf(" path=%s", canonical_path);
3164 g_free(canonical_path);
3165 } else {
3166 qemu_printf(" type=%s", object_get_typename(obj));
3167 }
3168 }
3169 qemu_printf("}");
3170 }
3171
3172 static void mtree_print_mr_owner(const MemoryRegion *mr)
3173 {
3174 Object *owner = mr->owner;
3175 Object *parent = memory_region_owner((MemoryRegion *)mr);
3176
3177 if (!owner && !parent) {
3178 qemu_printf(" orphan");
3179 return;
3180 }
3181 if (owner) {
3182 mtree_expand_owner("owner", owner);
3183 }
3184 if (parent && parent != owner) {
3185 mtree_expand_owner("parent", parent);
3186 }
3187 }
3188
3189 static void mtree_print_mr(const MemoryRegion *mr, unsigned int level,
3190 hwaddr base,
3191 MemoryRegionListHead *alias_print_queue,
3192 bool owner, bool display_disabled)
3193 {
3194 MemoryRegionList *new_ml, *ml, *next_ml;
3195 MemoryRegionListHead submr_print_queue;
3196 const MemoryRegion *submr;
3197 unsigned int i;
3198 hwaddr cur_start, cur_end;
3199
3200 if (!mr) {
3201 return;
3202 }
3203
3204 cur_start = base + mr->addr;
3205 cur_end = cur_start + MR_SIZE(mr->size);
3206
3207 /*
3208 * Try to detect overflow of memory region. This should never
3209 * happen normally. When it happens, we dump something to warn the
3210 * user who is observing this.
3211 */
3212 if (cur_start < base || cur_end < cur_start) {
3213 qemu_printf("[DETECTED OVERFLOW!] ");
3214 }
3215
3216 if (mr->alias) {
3217 MemoryRegionList *ml;
3218 bool found = false;
3219
3220 /* check if the alias is already in the queue */
3221 QTAILQ_FOREACH(ml, alias_print_queue, mrqueue) {
3222 if (ml->mr == mr->alias) {
3223 found = true;
3224 }
3225 }
3226
3227 if (!found) {
3228 ml = g_new(MemoryRegionList, 1);
3229 ml->mr = mr->alias;
3230 QTAILQ_INSERT_TAIL(alias_print_queue, ml, mrqueue);
3231 }
3232 if (mr->enabled || display_disabled) {
3233 for (i = 0; i < level; i++) {
3234 qemu_printf(MTREE_INDENT);
3235 }
3236 qemu_printf(HWADDR_FMT_plx "-" HWADDR_FMT_plx
3237 " (prio %d, %s%s): alias %s @%s " HWADDR_FMT_plx
3238 "-" HWADDR_FMT_plx "%s",
3239 cur_start, cur_end,
3240 mr->priority,
3241 mr->nonvolatile ? "nv-" : "",
3242 memory_region_type((MemoryRegion *)mr),
3243 memory_region_name(mr),
3244 memory_region_name(mr->alias),
3245 mr->alias_offset,
3246 mr->alias_offset + MR_SIZE(mr->size),
3247 mr->enabled ? "" : " [disabled]");
3248 if (owner) {
3249 mtree_print_mr_owner(mr);
3250 }
3251 qemu_printf("\n");
3252 }
3253 } else {
3254 if (mr->enabled || display_disabled) {
3255 for (i = 0; i < level; i++) {
3256 qemu_printf(MTREE_INDENT);
3257 }
3258 qemu_printf(HWADDR_FMT_plx "-" HWADDR_FMT_plx
3259 " (prio %d, %s%s): %s%s",
3260 cur_start, cur_end,
3261 mr->priority,
3262 mr->nonvolatile ? "nv-" : "",
3263 memory_region_type((MemoryRegion *)mr),
3264 memory_region_name(mr),
3265 mr->enabled ? "" : " [disabled]");
3266 if (owner) {
3267 mtree_print_mr_owner(mr);
3268 }
3269 qemu_printf("\n");
3270 }
3271 }
3272
3273 QTAILQ_INIT(&submr_print_queue);
3274
3275 QTAILQ_FOREACH(submr, &mr->subregions, subregions_link) {
3276 new_ml = g_new(MemoryRegionList, 1);
3277 new_ml->mr = submr;
3278 QTAILQ_FOREACH(ml, &submr_print_queue, mrqueue) {
3279 if (new_ml->mr->addr < ml->mr->addr ||
3280 (new_ml->mr->addr == ml->mr->addr &&
3281 new_ml->mr->priority > ml->mr->priority)) {
3282 QTAILQ_INSERT_BEFORE(ml, new_ml, mrqueue);
3283 new_ml = NULL;
3284 break;
3285 }
3286 }
3287 if (new_ml) {
3288 QTAILQ_INSERT_TAIL(&submr_print_queue, new_ml, mrqueue);
3289 }
3290 }
3291
3292 QTAILQ_FOREACH(ml, &submr_print_queue, mrqueue) {
3293 mtree_print_mr(ml->mr, level + 1, cur_start,
3294 alias_print_queue, owner, display_disabled);
3295 }
3296
3297 QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, mrqueue, next_ml) {
3298 g_free(ml);
3299 }
3300 }
3301
3302 struct FlatViewInfo {
3303 int counter;
3304 bool dispatch_tree;
3305 bool owner;
3306 AccelClass *ac;
3307 };
3308
3309 static void mtree_print_flatview(gpointer key, gpointer value,
3310 gpointer user_data)
3311 {
3312 FlatView *view = key;
3313 GArray *fv_address_spaces = value;
3314 struct FlatViewInfo *fvi = user_data;
3315 FlatRange *range = &view->ranges[0];
3316 MemoryRegion *mr;
3317 int n = view->nr;
3318 int i;
3319 AddressSpace *as;
3320
3321 qemu_printf("FlatView #%d\n", fvi->counter);
3322 ++fvi->counter;
3323
3324 for (i = 0; i < fv_address_spaces->len; ++i) {
3325 as = g_array_index(fv_address_spaces, AddressSpace*, i);
3326 qemu_printf(" AS \"%s\", root: %s",
3327 as->name, memory_region_name(as->root));
3328 if (as->root->alias) {
3329 qemu_printf(", alias %s", memory_region_name(as->root->alias));
3330 }
3331 qemu_printf("\n");
3332 }
3333
3334 qemu_printf(" Root memory region: %s\n",
3335 view->root ? memory_region_name(view->root) : "(none)");
3336
3337 if (n <= 0) {
3338 qemu_printf(MTREE_INDENT "No rendered FlatView\n\n");
3339 return;
3340 }
3341
3342 while (n--) {
3343 mr = range->mr;
3344 if (range->offset_in_region) {
3345 qemu_printf(MTREE_INDENT HWADDR_FMT_plx "-" HWADDR_FMT_plx
3346 " (prio %d, %s%s): %s @" HWADDR_FMT_plx,
3347 int128_get64(range->addr.start),
3348 int128_get64(range->addr.start)
3349 + MR_SIZE(range->addr.size),
3350 mr->priority,
3351 range->nonvolatile ? "nv-" : "",
3352 range->readonly ? "rom" : memory_region_type(mr),
3353 memory_region_name(mr),
3354 range->offset_in_region);
3355 } else {
3356 qemu_printf(MTREE_INDENT HWADDR_FMT_plx "-" HWADDR_FMT_plx
3357 " (prio %d, %s%s): %s",
3358 int128_get64(range->addr.start),
3359 int128_get64(range->addr.start)
3360 + MR_SIZE(range->addr.size),
3361 mr->priority,
3362 range->nonvolatile ? "nv-" : "",
3363 range->readonly ? "rom" : memory_region_type(mr),
3364 memory_region_name(mr));
3365 }
3366 if (fvi->owner) {
3367 mtree_print_mr_owner(mr);
3368 }
3369
3370 if (fvi->ac) {
3371 for (i = 0; i < fv_address_spaces->len; ++i) {
3372 as = g_array_index(fv_address_spaces, AddressSpace*, i);
3373 if (fvi->ac->has_memory(current_machine, as,
3374 int128_get64(range->addr.start),
3375 MR_SIZE(range->addr.size) + 1)) {
3376 qemu_printf(" %s", fvi->ac->name);
3377 }
3378 }
3379 }
3380 qemu_printf("\n");
3381 range++;
3382 }
3383
3384 #if !defined(CONFIG_USER_ONLY)
3385 if (fvi->dispatch_tree && view->root) {
3386 mtree_print_dispatch(view->dispatch, view->root);
3387 }
3388 #endif
3389
3390 qemu_printf("\n");
3391 }
3392
3393 static gboolean mtree_info_flatview_free(gpointer key, gpointer value,
3394 gpointer user_data)
3395 {
3396 FlatView *view = key;
3397 GArray *fv_address_spaces = value;
3398
3399 g_array_unref(fv_address_spaces);
3400 flatview_unref(view);
3401
3402 return true;
3403 }
3404
3405 static void mtree_info_flatview(bool dispatch_tree, bool owner)
3406 {
3407 struct FlatViewInfo fvi = {
3408 .counter = 0,
3409 .dispatch_tree = dispatch_tree,
3410 .owner = owner,
3411 };
3412 AddressSpace *as;
3413 FlatView *view;
3414 GArray *fv_address_spaces;
3415 GHashTable *views = g_hash_table_new(g_direct_hash, g_direct_equal);
3416 AccelClass *ac = ACCEL_GET_CLASS(current_accel());
3417
3418 if (ac->has_memory) {
3419 fvi.ac = ac;
3420 }
3421
3422 /* Gather all FVs in one table */
3423 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
3424 view = address_space_get_flatview(as);
3425
3426 fv_address_spaces = g_hash_table_lookup(views, view);
3427 if (!fv_address_spaces) {
3428 fv_address_spaces = g_array_new(false, false, sizeof(as));
3429 g_hash_table_insert(views, view, fv_address_spaces);
3430 }
3431
3432 g_array_append_val(fv_address_spaces, as);
3433 }
3434
3435 /* Print */
3436 g_hash_table_foreach(views, mtree_print_flatview, &fvi);
3437
3438 /* Free */
3439 g_hash_table_foreach_remove(views, mtree_info_flatview_free, 0);
3440 g_hash_table_unref(views);
3441 }
3442
3443 struct AddressSpaceInfo {
3444 MemoryRegionListHead *ml_head;
3445 bool owner;
3446 bool disabled;
3447 };
3448
3449 /* Returns negative value if a < b; zero if a = b; positive value if a > b. */
3450 static gint address_space_compare_name(gconstpointer a, gconstpointer b)
3451 {
3452 const AddressSpace *as_a = a;
3453 const AddressSpace *as_b = b;
3454
3455 return g_strcmp0(as_a->name, as_b->name);
3456 }
3457
3458 static void mtree_print_as_name(gpointer data, gpointer user_data)
3459 {
3460 AddressSpace *as = data;
3461
3462 qemu_printf("address-space: %s\n", as->name);
3463 }
3464
3465 static void mtree_print_as(gpointer key, gpointer value, gpointer user_data)
3466 {
3467 MemoryRegion *mr = key;
3468 GSList *as_same_root_mr_list = value;
3469 struct AddressSpaceInfo *asi = user_data;
3470
3471 g_slist_foreach(as_same_root_mr_list, mtree_print_as_name, NULL);
3472 mtree_print_mr(mr, 1, 0, asi->ml_head, asi->owner, asi->disabled);
3473 qemu_printf("\n");
3474 }
3475
3476 static gboolean mtree_info_as_free(gpointer key, gpointer value,
3477 gpointer user_data)
3478 {
3479 GSList *as_same_root_mr_list = value;
3480
3481 g_slist_free(as_same_root_mr_list);
3482
3483 return true;
3484 }
3485
3486 static void mtree_info_as(bool dispatch_tree, bool owner, bool disabled)
3487 {
3488 MemoryRegionListHead ml_head;
3489 MemoryRegionList *ml, *ml2;
3490 AddressSpace *as;
3491 GHashTable *views = g_hash_table_new(g_direct_hash, g_direct_equal);
3492 GSList *as_same_root_mr_list;
3493 struct AddressSpaceInfo asi = {
3494 .ml_head = &ml_head,
3495 .owner = owner,
3496 .disabled = disabled,
3497 };
3498
3499 QTAILQ_INIT(&ml_head);
3500
3501 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
3502 /* Create hashtable, key=AS root MR, value = list of AS */
3503 as_same_root_mr_list = g_hash_table_lookup(views, as->root);
3504 as_same_root_mr_list = g_slist_insert_sorted(as_same_root_mr_list, as,
3505 address_space_compare_name);
3506 g_hash_table_insert(views, as->root, as_same_root_mr_list);
3507 }
3508
3509 /* print address spaces */
3510 g_hash_table_foreach(views, mtree_print_as, &asi);
3511 g_hash_table_foreach_remove(views, mtree_info_as_free, 0);
3512 g_hash_table_unref(views);
3513
3514 /* print aliased regions */
3515 QTAILQ_FOREACH(ml, &ml_head, mrqueue) {
3516 qemu_printf("memory-region: %s\n", memory_region_name(ml->mr));
3517 mtree_print_mr(ml->mr, 1, 0, &ml_head, owner, disabled);
3518 qemu_printf("\n");
3519 }
3520
3521 QTAILQ_FOREACH_SAFE(ml, &ml_head, mrqueue, ml2) {
3522 g_free(ml);
3523 }
3524 }
3525
3526 void mtree_info(bool flatview, bool dispatch_tree, bool owner, bool disabled)
3527 {
3528 if (flatview) {
3529 mtree_info_flatview(dispatch_tree, owner);
3530 } else {
3531 mtree_info_as(dispatch_tree, owner, disabled);
3532 }
3533 }
3534
3535 void memory_region_init_ram(MemoryRegion *mr,
3536 Object *owner,
3537 const char *name,
3538 uint64_t size,
3539 Error **errp)
3540 {
3541 DeviceState *owner_dev;
3542 Error *err = NULL;
3543
3544 memory_region_init_ram_nomigrate(mr, owner, name, size, &err);
3545 if (err) {
3546 error_propagate(errp, err);
3547 return;
3548 }
3549 /* This will assert if owner is neither NULL nor a DeviceState.
3550 * We only want the owner here for the purposes of defining a
3551 * unique name for migration. TODO: Ideally we should implement
3552 * a naming scheme for Objects which are not DeviceStates, in
3553 * which case we can relax this restriction.
3554 */
3555 owner_dev = DEVICE(owner);
3556 vmstate_register_ram(mr, owner_dev);
3557 }
3558
3559 void memory_region_init_rom(MemoryRegion *mr,
3560 Object *owner,
3561 const char *name,
3562 uint64_t size,
3563 Error **errp)
3564 {
3565 DeviceState *owner_dev;
3566 Error *err = NULL;
3567
3568 memory_region_init_rom_nomigrate(mr, owner, name, size, &err);
3569 if (err) {
3570 error_propagate(errp, err);
3571 return;
3572 }
3573 /* This will assert if owner is neither NULL nor a DeviceState.
3574 * We only want the owner here for the purposes of defining a
3575 * unique name for migration. TODO: Ideally we should implement
3576 * a naming scheme for Objects which are not DeviceStates, in
3577 * which case we can relax this restriction.
3578 */
3579 owner_dev = DEVICE(owner);
3580 vmstate_register_ram(mr, owner_dev);
3581 }
3582
3583 void memory_region_init_rom_device(MemoryRegion *mr,
3584 Object *owner,
3585 const MemoryRegionOps *ops,
3586 void *opaque,
3587 const char *name,
3588 uint64_t size,
3589 Error **errp)
3590 {
3591 DeviceState *owner_dev;
3592 Error *err = NULL;
3593
3594 memory_region_init_rom_device_nomigrate(mr, owner, ops, opaque,
3595 name, size, &err);
3596 if (err) {
3597 error_propagate(errp, err);
3598 return;
3599 }
3600 /* This will assert if owner is neither NULL nor a DeviceState.
3601 * We only want the owner here for the purposes of defining a
3602 * unique name for migration. TODO: Ideally we should implement
3603 * a naming scheme for Objects which are not DeviceStates, in
3604 * which case we can relax this restriction.
3605 */
3606 owner_dev = DEVICE(owner);
3607 vmstate_register_ram(mr, owner_dev);
3608 }
3609
3610 /*
3611 * Support softmmu builds with CONFIG_FUZZ using a weak symbol and a stub for
3612 * the fuzz_dma_read_cb callback
3613 */
3614 #ifdef CONFIG_FUZZ
3615 void __attribute__((weak)) fuzz_dma_read_cb(size_t addr,
3616 size_t len,
3617 MemoryRegion *mr)
3618 {
3619 }
3620 #endif
3621
3622 static const TypeInfo memory_region_info = {
3623 .parent = TYPE_OBJECT,
3624 .name = TYPE_MEMORY_REGION,
3625 .class_size = sizeof(MemoryRegionClass),
3626 .instance_size = sizeof(MemoryRegion),
3627 .instance_init = memory_region_initfn,
3628 .instance_finalize = memory_region_finalize,
3629 };
3630
3631 static const TypeInfo iommu_memory_region_info = {
3632 .parent = TYPE_MEMORY_REGION,
3633 .name = TYPE_IOMMU_MEMORY_REGION,
3634 .class_size = sizeof(IOMMUMemoryRegionClass),
3635 .instance_size = sizeof(IOMMUMemoryRegion),
3636 .instance_init = iommu_memory_region_initfn,
3637 .abstract = true,
3638 };
3639
3640 static const TypeInfo ram_discard_manager_info = {
3641 .parent = TYPE_INTERFACE,
3642 .name = TYPE_RAM_DISCARD_MANAGER,
3643 .class_size = sizeof(RamDiscardManagerClass),
3644 };
3645
3646 static void memory_register_types(void)
3647 {
3648 type_register_static(&memory_region_info);
3649 type_register_static(&iommu_memory_region_info);
3650 type_register_static(&ram_discard_manager_info);
3651 }
3652
3653 type_init(memory_register_types)
armbru's QEMU hackery