2 * Physical memory management
4 * Copyright 2011 Red Hat, Inc. and/or its affiliates
7 * Avi Kivity <avi@redhat.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
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.
16 #include "qemu/osdep.h"
17 #include "qapi/error.h"
18 #include "qemu-common.h"
20 #include "exec/memory.h"
21 #include "exec/address-spaces.h"
22 #include "exec/ioport.h"
23 #include "qapi/visitor.h"
24 #include "qemu/bitops.h"
25 #include "qemu/error-report.h"
26 #include "qom/object.h"
29 #include "exec/memory-internal.h"
30 #include "exec/ram_addr.h"
31 #include "sysemu/kvm.h"
32 #include "sysemu/sysemu.h"
34 //#define DEBUG_UNASSIGNED
36 #define RAM_ADDR_INVALID (~(ram_addr_t)0)
38 static unsigned memory_region_transaction_depth;
39 static bool memory_region_update_pending;
40 static bool ioeventfd_update_pending;
41 static bool global_dirty_log = false;
43 static QTAILQ_HEAD(memory_listeners, MemoryListener) memory_listeners
44 = QTAILQ_HEAD_INITIALIZER(memory_listeners);
46 static QTAILQ_HEAD(, AddressSpace) address_spaces
47 = QTAILQ_HEAD_INITIALIZER(address_spaces);
49 typedef struct AddrRange AddrRange;
52 * Note that signed integers are needed for negative offsetting in aliases
53 * (large MemoryRegion::alias_offset).
60 static AddrRange addrrange_make(Int128 start, Int128 size)
62 return (AddrRange) { start, size };
65 static bool addrrange_equal(AddrRange r1, AddrRange r2)
67 return int128_eq(r1.start, r2.start) && int128_eq(r1.size, r2.size);
70 static Int128 addrrange_end(AddrRange r)
72 return int128_add(r.start, r.size);
75 static AddrRange addrrange_shift(AddrRange range, Int128 delta)
77 int128_addto(&range.start, delta);
81 static bool addrrange_contains(AddrRange range, Int128 addr)
83 return int128_ge(addr, range.start)
84 && int128_lt(addr, addrrange_end(range));
87 static bool addrrange_intersects(AddrRange r1, AddrRange r2)
89 return addrrange_contains(r1, r2.start)
90 || addrrange_contains(r2, r1.start);
93 static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2)
95 Int128 start = int128_max(r1.start, r2.start);
96 Int128 end = int128_min(addrrange_end(r1), addrrange_end(r2));
97 return addrrange_make(start, int128_sub(end, start));
100 enum ListenerDirection { Forward, Reverse };
102 static bool memory_listener_match(MemoryListener *listener,
103 MemoryRegionSection *section)
105 return !listener->address_space_filter
106 || listener->address_space_filter == section->address_space;
109 #define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
111 MemoryListener *_listener; \
113 switch (_direction) { \
115 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
116 if (_listener->_callback) { \
117 _listener->_callback(_listener, ##_args); \
122 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
123 memory_listeners, link) { \
124 if (_listener->_callback) { \
125 _listener->_callback(_listener, ##_args); \
134 #define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \
136 MemoryListener *_listener; \
138 switch (_direction) { \
140 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
141 if (_listener->_callback \
142 && memory_listener_match(_listener, _section)) { \
143 _listener->_callback(_listener, _section, ##_args); \
148 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
149 memory_listeners, link) { \
150 if (_listener->_callback \
151 && memory_listener_match(_listener, _section)) { \
152 _listener->_callback(_listener, _section, ##_args); \
161 /* No need to ref/unref .mr, the FlatRange keeps it alive. */
162 #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback, _args...) \
163 MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \
165 .address_space = (as), \
166 .offset_within_region = (fr)->offset_in_region, \
167 .size = (fr)->addr.size, \
168 .offset_within_address_space = int128_get64((fr)->addr.start), \
169 .readonly = (fr)->readonly, \
172 struct CoalescedMemoryRange {
174 QTAILQ_ENTRY(CoalescedMemoryRange) link;
177 struct MemoryRegionIoeventfd {
184 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a,
185 MemoryRegionIoeventfd b)
187 if (int128_lt(a.addr.start, b.addr.start)) {
189 } else if (int128_gt(a.addr.start, b.addr.start)) {
191 } else if (int128_lt(a.addr.size, b.addr.size)) {
193 } else if (int128_gt(a.addr.size, b.addr.size)) {
195 } else if (a.match_data < b.match_data) {
197 } else if (a.match_data > b.match_data) {
199 } else if (a.match_data) {
200 if (a.data < b.data) {
202 } else if (a.data > b.data) {
208 } else if (a.e > b.e) {
214 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a,
215 MemoryRegionIoeventfd b)
217 return !memory_region_ioeventfd_before(a, b)
218 && !memory_region_ioeventfd_before(b, a);
221 typedef struct FlatRange FlatRange;
222 typedef struct FlatView FlatView;
224 /* Range of memory in the global map. Addresses are absolute. */
227 hwaddr offset_in_region;
229 uint8_t dirty_log_mask;
234 /* Flattened global view of current active memory hierarchy. Kept in sorted
242 unsigned nr_allocated;
245 typedef struct AddressSpaceOps AddressSpaceOps;
247 #define FOR_EACH_FLAT_RANGE(var, view) \
248 for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
250 static bool flatrange_equal(FlatRange *a, FlatRange *b)
252 return a->mr == b->mr
253 && addrrange_equal(a->addr, b->addr)
254 && a->offset_in_region == b->offset_in_region
255 && a->romd_mode == b->romd_mode
256 && a->readonly == b->readonly;
259 static void flatview_init(FlatView *view)
264 view->nr_allocated = 0;
267 /* Insert a range into a given position. Caller is responsible for maintaining
270 static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range)
272 if (view->nr == view->nr_allocated) {
273 view->nr_allocated = MAX(2 * view->nr, 10);
274 view->ranges = g_realloc(view->ranges,
275 view->nr_allocated * sizeof(*view->ranges));
277 memmove(view->ranges + pos + 1, view->ranges + pos,
278 (view->nr - pos) * sizeof(FlatRange));
279 view->ranges[pos] = *range;
280 memory_region_ref(range->mr);
284 static void flatview_destroy(FlatView *view)
288 for (i = 0; i < view->nr; i++) {
289 memory_region_unref(view->ranges[i].mr);
291 g_free(view->ranges);
295 static void flatview_ref(FlatView *view)
297 atomic_inc(&view->ref);
300 static void flatview_unref(FlatView *view)
302 if (atomic_fetch_dec(&view->ref) == 1) {
303 flatview_destroy(view);
307 static bool can_merge(FlatRange *r1, FlatRange *r2)
309 return int128_eq(addrrange_end(r1->addr), r2->addr.start)
311 && int128_eq(int128_add(int128_make64(r1->offset_in_region),
313 int128_make64(r2->offset_in_region))
314 && r1->dirty_log_mask == r2->dirty_log_mask
315 && r1->romd_mode == r2->romd_mode
316 && r1->readonly == r2->readonly;
319 /* Attempt to simplify a view by merging adjacent ranges */
320 static void flatview_simplify(FlatView *view)
325 while (i < view->nr) {
328 && can_merge(&view->ranges[j-1], &view->ranges[j])) {
329 int128_addto(&view->ranges[i].addr.size, view->ranges[j].addr.size);
333 memmove(&view->ranges[i], &view->ranges[j],
334 (view->nr - j) * sizeof(view->ranges[j]));
339 static bool memory_region_big_endian(MemoryRegion *mr)
341 #ifdef TARGET_WORDS_BIGENDIAN
342 return mr->ops->endianness != DEVICE_LITTLE_ENDIAN;
344 return mr->ops->endianness == DEVICE_BIG_ENDIAN;
348 static bool memory_region_wrong_endianness(MemoryRegion *mr)
350 #ifdef TARGET_WORDS_BIGENDIAN
351 return mr->ops->endianness == DEVICE_LITTLE_ENDIAN;
353 return mr->ops->endianness == DEVICE_BIG_ENDIAN;
357 static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size)
359 if (memory_region_wrong_endianness(mr)) {
364 *data = bswap16(*data);
367 *data = bswap32(*data);
370 *data = bswap64(*data);
378 static hwaddr memory_region_to_absolute_addr(MemoryRegion *mr, hwaddr offset)
381 hwaddr abs_addr = offset;
383 abs_addr += mr->addr;
384 for (root = mr; root->container; ) {
385 root = root->container;
386 abs_addr += root->addr;
392 static int get_cpu_index(void)
395 return current_cpu->cpu_index;
400 static MemTxResult memory_region_oldmmio_read_accessor(MemoryRegion *mr,
410 tmp = mr->ops->old_mmio.read[ctz32(size)](mr->opaque, addr);
412 trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size);
413 } else if (mr == &io_mem_notdirty) {
414 /* Accesses to code which has previously been translated into a TB show
415 * up in the MMIO path, as accesses to the io_mem_notdirty
417 trace_memory_region_tb_read(get_cpu_index(), addr, tmp, size);
418 } else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED) {
419 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
420 trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
422 *value |= (tmp & mask) << shift;
426 static MemTxResult memory_region_read_accessor(MemoryRegion *mr,
436 tmp = mr->ops->read(mr->opaque, addr, size);
438 trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size);
439 } else if (mr == &io_mem_notdirty) {
440 /* Accesses to code which has previously been translated into a TB show
441 * up in the MMIO path, as accesses to the io_mem_notdirty
443 trace_memory_region_tb_read(get_cpu_index(), addr, tmp, size);
444 } else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED) {
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);
448 *value |= (tmp & mask) << shift;
452 static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
463 r = mr->ops->read_with_attrs(mr->opaque, addr, &tmp, size, attrs);
465 trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size);
466 } else if (mr == &io_mem_notdirty) {
467 /* Accesses to code which has previously been translated into a TB show
468 * up in the MMIO path, as accesses to the io_mem_notdirty
470 trace_memory_region_tb_read(get_cpu_index(), addr, tmp, size);
471 } else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED) {
472 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
473 trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
475 *value |= (tmp & mask) << shift;
479 static MemTxResult memory_region_oldmmio_write_accessor(MemoryRegion *mr,
489 tmp = (*value >> shift) & mask;
491 trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
492 } else if (mr == &io_mem_notdirty) {
493 /* Accesses to code which has previously been translated into a TB show
494 * up in the MMIO path, as accesses to the io_mem_notdirty
496 trace_memory_region_tb_write(get_cpu_index(), addr, tmp, size);
497 } else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED) {
498 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
499 trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
501 mr->ops->old_mmio.write[ctz32(size)](mr->opaque, addr, tmp);
505 static MemTxResult memory_region_write_accessor(MemoryRegion *mr,
515 tmp = (*value >> shift) & mask;
517 trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
518 } else if (mr == &io_mem_notdirty) {
519 /* Accesses to code which has previously been translated into a TB show
520 * up in the MMIO path, as accesses to the io_mem_notdirty
522 trace_memory_region_tb_write(get_cpu_index(), addr, tmp, size);
523 } else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED) {
524 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
525 trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
527 mr->ops->write(mr->opaque, addr, tmp, size);
531 static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr,
541 tmp = (*value >> shift) & mask;
543 trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
544 } else if (mr == &io_mem_notdirty) {
545 /* Accesses to code which has previously been translated into a TB show
546 * up in the MMIO path, as accesses to the io_mem_notdirty
548 trace_memory_region_tb_write(get_cpu_index(), addr, tmp, size);
549 } else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED) {
550 hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
551 trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
553 return mr->ops->write_with_attrs(mr->opaque, addr, tmp, size, attrs);
556 static MemTxResult access_with_adjusted_size(hwaddr addr,
559 unsigned access_size_min,
560 unsigned access_size_max,
561 MemTxResult (*access)(MemoryRegion *mr,
571 uint64_t access_mask;
572 unsigned access_size;
574 MemTxResult r = MEMTX_OK;
576 if (!access_size_min) {
579 if (!access_size_max) {
583 /* FIXME: support unaligned access? */
584 access_size = MAX(MIN(size, access_size_max), access_size_min);
585 access_mask = -1ULL >> (64 - access_size * 8);
586 if (memory_region_big_endian(mr)) {
587 for (i = 0; i < size; i += access_size) {
588 r |= access(mr, addr + i, value, access_size,
589 (size - access_size - i) * 8, access_mask, attrs);
592 for (i = 0; i < size; i += access_size) {
593 r |= access(mr, addr + i, value, access_size, i * 8,
600 static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
604 while (mr->container) {
607 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
608 if (mr == as->root) {
615 /* Render a memory region into the global view. Ranges in @view obscure
618 static void render_memory_region(FlatView *view,
624 MemoryRegion *subregion;
626 hwaddr offset_in_region;
636 int128_addto(&base, int128_make64(mr->addr));
637 readonly |= mr->readonly;
639 tmp = addrrange_make(base, mr->size);
641 if (!addrrange_intersects(tmp, clip)) {
645 clip = addrrange_intersection(tmp, clip);
648 int128_subfrom(&base, int128_make64(mr->alias->addr));
649 int128_subfrom(&base, int128_make64(mr->alias_offset));
650 render_memory_region(view, mr->alias, base, clip, readonly);
654 /* Render subregions in priority order. */
655 QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
656 render_memory_region(view, subregion, base, clip, readonly);
659 if (!mr->terminates) {
663 offset_in_region = int128_get64(int128_sub(clip.start, base));
668 fr.dirty_log_mask = memory_region_get_dirty_log_mask(mr);
669 fr.romd_mode = mr->romd_mode;
670 fr.readonly = readonly;
672 /* Render the region itself into any gaps left by the current view. */
673 for (i = 0; i < view->nr && int128_nz(remain); ++i) {
674 if (int128_ge(base, addrrange_end(view->ranges[i].addr))) {
677 if (int128_lt(base, view->ranges[i].addr.start)) {
678 now = int128_min(remain,
679 int128_sub(view->ranges[i].addr.start, base));
680 fr.offset_in_region = offset_in_region;
681 fr.addr = addrrange_make(base, now);
682 flatview_insert(view, i, &fr);
684 int128_addto(&base, now);
685 offset_in_region += int128_get64(now);
686 int128_subfrom(&remain, now);
688 now = int128_sub(int128_min(int128_add(base, remain),
689 addrrange_end(view->ranges[i].addr)),
691 int128_addto(&base, now);
692 offset_in_region += int128_get64(now);
693 int128_subfrom(&remain, now);
695 if (int128_nz(remain)) {
696 fr.offset_in_region = offset_in_region;
697 fr.addr = addrrange_make(base, remain);
698 flatview_insert(view, i, &fr);
702 /* Render a memory topology into a list of disjoint absolute ranges. */
703 static FlatView *generate_memory_topology(MemoryRegion *mr)
707 view = g_new(FlatView, 1);
711 render_memory_region(view, mr, int128_zero(),
712 addrrange_make(int128_zero(), int128_2_64()), false);
714 flatview_simplify(view);
719 static void address_space_add_del_ioeventfds(AddressSpace *as,
720 MemoryRegionIoeventfd *fds_new,
722 MemoryRegionIoeventfd *fds_old,
726 MemoryRegionIoeventfd *fd;
727 MemoryRegionSection section;
729 /* Generate a symmetric difference of the old and new fd sets, adding
730 * and deleting as necessary.
734 while (iold < fds_old_nb || inew < fds_new_nb) {
735 if (iold < fds_old_nb
736 && (inew == fds_new_nb
737 || memory_region_ioeventfd_before(fds_old[iold],
740 section = (MemoryRegionSection) {
742 .offset_within_address_space = int128_get64(fd->addr.start),
743 .size = fd->addr.size,
745 MEMORY_LISTENER_CALL(eventfd_del, Forward, §ion,
746 fd->match_data, fd->data, fd->e);
748 } else if (inew < fds_new_nb
749 && (iold == fds_old_nb
750 || memory_region_ioeventfd_before(fds_new[inew],
753 section = (MemoryRegionSection) {
755 .offset_within_address_space = int128_get64(fd->addr.start),
756 .size = fd->addr.size,
758 MEMORY_LISTENER_CALL(eventfd_add, Reverse, §ion,
759 fd->match_data, fd->data, fd->e);
768 static FlatView *address_space_get_flatview(AddressSpace *as)
773 view = atomic_rcu_read(&as->current_map);
779 static void address_space_update_ioeventfds(AddressSpace *as)
783 unsigned ioeventfd_nb = 0;
784 MemoryRegionIoeventfd *ioeventfds = NULL;
788 view = address_space_get_flatview(as);
789 FOR_EACH_FLAT_RANGE(fr, view) {
790 for (i = 0; i < fr->mr->ioeventfd_nb; ++i) {
791 tmp = addrrange_shift(fr->mr->ioeventfds[i].addr,
792 int128_sub(fr->addr.start,
793 int128_make64(fr->offset_in_region)));
794 if (addrrange_intersects(fr->addr, tmp)) {
796 ioeventfds = g_realloc(ioeventfds,
797 ioeventfd_nb * sizeof(*ioeventfds));
798 ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i];
799 ioeventfds[ioeventfd_nb-1].addr = tmp;
804 address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb,
805 as->ioeventfds, as->ioeventfd_nb);
807 g_free(as->ioeventfds);
808 as->ioeventfds = ioeventfds;
809 as->ioeventfd_nb = ioeventfd_nb;
810 flatview_unref(view);
813 static void address_space_update_topology_pass(AddressSpace *as,
814 const FlatView *old_view,
815 const FlatView *new_view,
819 FlatRange *frold, *frnew;
821 /* Generate a symmetric difference of the old and new memory maps.
822 * Kill ranges in the old map, and instantiate ranges in the new map.
825 while (iold < old_view->nr || inew < new_view->nr) {
826 if (iold < old_view->nr) {
827 frold = &old_view->ranges[iold];
831 if (inew < new_view->nr) {
832 frnew = &new_view->ranges[inew];
839 || int128_lt(frold->addr.start, frnew->addr.start)
840 || (int128_eq(frold->addr.start, frnew->addr.start)
841 && !flatrange_equal(frold, frnew)))) {
842 /* In old but not in new, or in both but attributes changed. */
845 MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del);
849 } else if (frold && frnew && flatrange_equal(frold, frnew)) {
850 /* In both and unchanged (except logging may have changed) */
853 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop);
854 if (frnew->dirty_log_mask & ~frold->dirty_log_mask) {
855 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start,
856 frold->dirty_log_mask,
857 frnew->dirty_log_mask);
859 if (frold->dirty_log_mask & ~frnew->dirty_log_mask) {
860 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop,
861 frold->dirty_log_mask,
862 frnew->dirty_log_mask);
872 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add);
881 static void address_space_update_topology(AddressSpace *as)
883 FlatView *old_view = address_space_get_flatview(as);
884 FlatView *new_view = generate_memory_topology(as->root);
886 address_space_update_topology_pass(as, old_view, new_view, false);
887 address_space_update_topology_pass(as, old_view, new_view, true);
889 /* Writes are protected by the BQL. */
890 atomic_rcu_set(&as->current_map, new_view);
891 call_rcu(old_view, flatview_unref, rcu);
893 /* Note that all the old MemoryRegions are still alive up to this
894 * point. This relieves most MemoryListeners from the need to
895 * ref/unref the MemoryRegions they get---unless they use them
896 * outside the iothread mutex, in which case precise reference
897 * counting is necessary.
899 flatview_unref(old_view);
901 address_space_update_ioeventfds(as);
904 void memory_region_transaction_begin(void)
906 qemu_flush_coalesced_mmio_buffer();
907 ++memory_region_transaction_depth;
910 static void memory_region_clear_pending(void)
912 memory_region_update_pending = false;
913 ioeventfd_update_pending = false;
916 void memory_region_transaction_commit(void)
920 assert(memory_region_transaction_depth);
921 --memory_region_transaction_depth;
922 if (!memory_region_transaction_depth) {
923 if (memory_region_update_pending) {
924 MEMORY_LISTENER_CALL_GLOBAL(begin, Forward);
926 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
927 address_space_update_topology(as);
930 MEMORY_LISTENER_CALL_GLOBAL(commit, Forward);
931 } else if (ioeventfd_update_pending) {
932 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
933 address_space_update_ioeventfds(as);
936 memory_region_clear_pending();
940 static void memory_region_destructor_none(MemoryRegion *mr)
944 static void memory_region_destructor_ram(MemoryRegion *mr)
946 qemu_ram_free(mr->ram_block);
949 static void memory_region_destructor_rom_device(MemoryRegion *mr)
951 qemu_ram_free(mr->ram_block);
954 static bool memory_region_need_escape(char c)
956 return c == '/' || c == '[' || c == '\\' || c == ']';
959 static char *memory_region_escape_name(const char *name)
966 for (p = name; *p; p++) {
967 bytes += memory_region_need_escape(*p) ? 4 : 1;
969 if (bytes == p - name) {
970 return g_memdup(name, bytes + 1);
973 escaped = g_malloc(bytes + 1);
974 for (p = name, q = escaped; *p; p++) {
976 if (unlikely(memory_region_need_escape(c))) {
979 *q++ = "0123456789abcdef"[c >> 4];
980 c = "0123456789abcdef"[c & 15];
988 void memory_region_init(MemoryRegion *mr,
993 object_initialize(mr, sizeof(*mr), TYPE_MEMORY_REGION);
994 mr->size = int128_make64(size);
995 if (size == UINT64_MAX) {
996 mr->size = int128_2_64();
998 mr->name = g_strdup(name);
1000 mr->ram_block = NULL;
1003 char *escaped_name = memory_region_escape_name(name);
1004 char *name_array = g_strdup_printf("%s[*]", escaped_name);
1007 owner = container_get(qdev_get_machine(), "/unattached");
1010 object_property_add_child(owner, name_array, OBJECT(mr), &error_abort);
1011 object_unref(OBJECT(mr));
1013 g_free(escaped_name);
1017 static void memory_region_get_addr(Object *obj, Visitor *v, const char *name,
1018 void *opaque, Error **errp)
1020 MemoryRegion *mr = MEMORY_REGION(obj);
1021 uint64_t value = mr->addr;
1023 visit_type_uint64(v, name, &value, errp);
1026 static void memory_region_get_container(Object *obj, Visitor *v,
1027 const char *name, void *opaque,
1030 MemoryRegion *mr = MEMORY_REGION(obj);
1031 gchar *path = (gchar *)"";
1033 if (mr->container) {
1034 path = object_get_canonical_path(OBJECT(mr->container));
1036 visit_type_str(v, name, &path, errp);
1037 if (mr->container) {
1042 static Object *memory_region_resolve_container(Object *obj, void *opaque,
1045 MemoryRegion *mr = MEMORY_REGION(obj);
1047 return OBJECT(mr->container);
1050 static void memory_region_get_priority(Object *obj, Visitor *v,
1051 const char *name, void *opaque,
1054 MemoryRegion *mr = MEMORY_REGION(obj);
1055 int32_t value = mr->priority;
1057 visit_type_int32(v, name, &value, errp);
1060 static bool memory_region_get_may_overlap(Object *obj, Error **errp)
1062 MemoryRegion *mr = MEMORY_REGION(obj);
1064 return mr->may_overlap;
1067 static void memory_region_get_size(Object *obj, Visitor *v, const char *name,
1068 void *opaque, Error **errp)
1070 MemoryRegion *mr = MEMORY_REGION(obj);
1071 uint64_t value = memory_region_size(mr);
1073 visit_type_uint64(v, name, &value, errp);
1076 static void memory_region_initfn(Object *obj)
1078 MemoryRegion *mr = MEMORY_REGION(obj);
1081 mr->ops = &unassigned_mem_ops;
1083 mr->romd_mode = true;
1084 mr->global_locking = true;
1085 mr->destructor = memory_region_destructor_none;
1086 QTAILQ_INIT(&mr->subregions);
1087 QTAILQ_INIT(&mr->coalesced);
1089 op = object_property_add(OBJECT(mr), "container",
1090 "link<" TYPE_MEMORY_REGION ">",
1091 memory_region_get_container,
1092 NULL, /* memory_region_set_container */
1093 NULL, NULL, &error_abort);
1094 op->resolve = memory_region_resolve_container;
1096 object_property_add(OBJECT(mr), "addr", "uint64",
1097 memory_region_get_addr,
1098 NULL, /* memory_region_set_addr */
1099 NULL, NULL, &error_abort);
1100 object_property_add(OBJECT(mr), "priority", "uint32",
1101 memory_region_get_priority,
1102 NULL, /* memory_region_set_priority */
1103 NULL, NULL, &error_abort);
1104 object_property_add_bool(OBJECT(mr), "may-overlap",
1105 memory_region_get_may_overlap,
1106 NULL, /* memory_region_set_may_overlap */
1108 object_property_add(OBJECT(mr), "size", "uint64",
1109 memory_region_get_size,
1110 NULL, /* memory_region_set_size, */
1111 NULL, NULL, &error_abort);
1114 static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
1117 #ifdef DEBUG_UNASSIGNED
1118 printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
1120 if (current_cpu != NULL) {
1121 cpu_unassigned_access(current_cpu, addr, false, false, 0, size);
1126 static void unassigned_mem_write(void *opaque, hwaddr addr,
1127 uint64_t val, unsigned size)
1129 #ifdef DEBUG_UNASSIGNED
1130 printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val);
1132 if (current_cpu != NULL) {
1133 cpu_unassigned_access(current_cpu, addr, true, false, 0, size);
1137 static bool unassigned_mem_accepts(void *opaque, hwaddr addr,
1138 unsigned size, bool is_write)
1143 const MemoryRegionOps unassigned_mem_ops = {
1144 .valid.accepts = unassigned_mem_accepts,
1145 .endianness = DEVICE_NATIVE_ENDIAN,
1148 bool memory_region_access_valid(MemoryRegion *mr,
1153 int access_size_min, access_size_max;
1156 if (!mr->ops->valid.unaligned && (addr & (size - 1))) {
1160 if (!mr->ops->valid.accepts) {
1164 access_size_min = mr->ops->valid.min_access_size;
1165 if (!mr->ops->valid.min_access_size) {
1166 access_size_min = 1;
1169 access_size_max = mr->ops->valid.max_access_size;
1170 if (!mr->ops->valid.max_access_size) {
1171 access_size_max = 4;
1174 access_size = MAX(MIN(size, access_size_max), access_size_min);
1175 for (i = 0; i < size; i += access_size) {
1176 if (!mr->ops->valid.accepts(mr->opaque, addr + i, access_size,
1185 static MemTxResult memory_region_dispatch_read1(MemoryRegion *mr,
1193 if (mr->ops->read) {
1194 return access_with_adjusted_size(addr, pval, size,
1195 mr->ops->impl.min_access_size,
1196 mr->ops->impl.max_access_size,
1197 memory_region_read_accessor,
1199 } else if (mr->ops->read_with_attrs) {
1200 return access_with_adjusted_size(addr, pval, size,
1201 mr->ops->impl.min_access_size,
1202 mr->ops->impl.max_access_size,
1203 memory_region_read_with_attrs_accessor,
1206 return access_with_adjusted_size(addr, pval, size, 1, 4,
1207 memory_region_oldmmio_read_accessor,
1212 MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
1220 if (!memory_region_access_valid(mr, addr, size, false)) {
1221 *pval = unassigned_mem_read(mr, addr, size);
1222 return MEMTX_DECODE_ERROR;
1225 r = memory_region_dispatch_read1(mr, addr, pval, size, attrs);
1226 adjust_endianness(mr, pval, size);
1230 /* Return true if an eventfd was signalled */
1231 static bool memory_region_dispatch_write_eventfds(MemoryRegion *mr,
1237 MemoryRegionIoeventfd ioeventfd = {
1238 .addr = addrrange_make(int128_make64(addr), int128_make64(size)),
1243 for (i = 0; i < mr->ioeventfd_nb; i++) {
1244 ioeventfd.match_data = mr->ioeventfds[i].match_data;
1245 ioeventfd.e = mr->ioeventfds[i].e;
1247 if (memory_region_ioeventfd_equal(ioeventfd, mr->ioeventfds[i])) {
1248 event_notifier_set(ioeventfd.e);
1256 MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
1262 if (!memory_region_access_valid(mr, addr, size, true)) {
1263 unassigned_mem_write(mr, addr, data, size);
1264 return MEMTX_DECODE_ERROR;
1267 adjust_endianness(mr, &data, size);
1269 if ((!kvm_eventfds_enabled()) &&
1270 memory_region_dispatch_write_eventfds(mr, addr, data, size, attrs)) {
1274 if (mr->ops->write) {
1275 return access_with_adjusted_size(addr, &data, size,
1276 mr->ops->impl.min_access_size,
1277 mr->ops->impl.max_access_size,
1278 memory_region_write_accessor, mr,
1280 } else if (mr->ops->write_with_attrs) {
1282 access_with_adjusted_size(addr, &data, size,
1283 mr->ops->impl.min_access_size,
1284 mr->ops->impl.max_access_size,
1285 memory_region_write_with_attrs_accessor,
1288 return access_with_adjusted_size(addr, &data, size, 1, 4,
1289 memory_region_oldmmio_write_accessor,
1294 void memory_region_init_io(MemoryRegion *mr,
1296 const MemoryRegionOps *ops,
1301 memory_region_init(mr, owner, name, size);
1302 mr->ops = ops ? ops : &unassigned_mem_ops;
1303 mr->opaque = opaque;
1304 mr->terminates = true;
1307 void memory_region_init_ram(MemoryRegion *mr,
1313 memory_region_init(mr, owner, name, size);
1315 mr->terminates = true;
1316 mr->destructor = memory_region_destructor_ram;
1317 mr->ram_block = qemu_ram_alloc(size, mr, errp);
1318 mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
1321 void memory_region_init_resizeable_ram(MemoryRegion *mr,
1326 void (*resized)(const char*,
1331 memory_region_init(mr, owner, name, size);
1333 mr->terminates = true;
1334 mr->destructor = memory_region_destructor_ram;
1335 mr->ram_block = qemu_ram_alloc_resizeable(size, max_size, resized,
1337 mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
1341 void memory_region_init_ram_from_file(MemoryRegion *mr,
1342 struct Object *owner,
1349 memory_region_init(mr, owner, name, size);
1351 mr->terminates = true;
1352 mr->destructor = memory_region_destructor_ram;
1353 mr->ram_block = qemu_ram_alloc_from_file(size, mr, share, path, errp);
1354 mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
1358 void memory_region_init_ram_ptr(MemoryRegion *mr,
1364 memory_region_init(mr, owner, name, size);
1366 mr->terminates = true;
1367 mr->destructor = memory_region_destructor_ram;
1368 mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
1370 /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
1371 assert(ptr != NULL);
1372 mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal);
1375 void memory_region_set_skip_dump(MemoryRegion *mr)
1377 mr->skip_dump = true;
1380 void memory_region_init_alias(MemoryRegion *mr,
1387 memory_region_init(mr, owner, name, size);
1389 mr->alias_offset = offset;
1392 void memory_region_init_rom_device(MemoryRegion *mr,
1394 const MemoryRegionOps *ops,
1400 memory_region_init(mr, owner, name, size);
1402 mr->opaque = opaque;
1403 mr->terminates = true;
1404 mr->rom_device = true;
1405 mr->destructor = memory_region_destructor_rom_device;
1406 mr->ram_block = qemu_ram_alloc(size, mr, errp);
1409 void memory_region_init_iommu(MemoryRegion *mr,
1411 const MemoryRegionIOMMUOps *ops,
1415 memory_region_init(mr, owner, name, size);
1416 mr->iommu_ops = ops,
1417 mr->terminates = true; /* then re-forwards */
1418 notifier_list_init(&mr->iommu_notify);
1421 static void memory_region_finalize(Object *obj)
1423 MemoryRegion *mr = MEMORY_REGION(obj);
1425 assert(!mr->container);
1427 /* We know the region is not visible in any address space (it
1428 * does not have a container and cannot be a root either because
1429 * it has no references, so we can blindly clear mr->enabled.
1430 * memory_region_set_enabled instead could trigger a transaction
1431 * and cause an infinite loop.
1433 mr->enabled = false;
1434 memory_region_transaction_begin();
1435 while (!QTAILQ_EMPTY(&mr->subregions)) {
1436 MemoryRegion *subregion = QTAILQ_FIRST(&mr->subregions);
1437 memory_region_del_subregion(mr, subregion);
1439 memory_region_transaction_commit();
1442 memory_region_clear_coalescing(mr);
1443 g_free((char *)mr->name);
1444 g_free(mr->ioeventfds);
1447 Object *memory_region_owner(MemoryRegion *mr)
1449 Object *obj = OBJECT(mr);
1453 void memory_region_ref(MemoryRegion *mr)
1455 /* MMIO callbacks most likely will access data that belongs
1456 * to the owner, hence the need to ref/unref the owner whenever
1457 * the memory region is in use.
1459 * The memory region is a child of its owner. As long as the
1460 * owner doesn't call unparent itself on the memory region,
1461 * ref-ing the owner will also keep the memory region alive.
1462 * Memory regions without an owner are supposed to never go away;
1463 * we do not ref/unref them because it slows down DMA sensibly.
1465 if (mr && mr->owner) {
1466 object_ref(mr->owner);
1470 void memory_region_unref(MemoryRegion *mr)
1472 if (mr && mr->owner) {
1473 object_unref(mr->owner);
1477 uint64_t memory_region_size(MemoryRegion *mr)
1479 if (int128_eq(mr->size, int128_2_64())) {
1482 return int128_get64(mr->size);
1485 const char *memory_region_name(const MemoryRegion *mr)
1488 ((MemoryRegion *)mr)->name =
1489 object_get_canonical_path_component(OBJECT(mr));
1494 bool memory_region_is_skip_dump(MemoryRegion *mr)
1496 return mr->skip_dump;
1499 uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr)
1501 uint8_t mask = mr->dirty_log_mask;
1502 if (global_dirty_log) {
1503 mask |= (1 << DIRTY_MEMORY_MIGRATION);
1508 bool memory_region_is_logging(MemoryRegion *mr, uint8_t client)
1510 return memory_region_get_dirty_log_mask(mr) & (1 << client);
1513 void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n)
1515 notifier_list_add(&mr->iommu_notify, n);
1518 void memory_region_iommu_replay(MemoryRegion *mr, Notifier *n,
1519 hwaddr granularity, bool is_write)
1522 IOMMUTLBEntry iotlb;
1524 for (addr = 0; addr < memory_region_size(mr); addr += granularity) {
1525 iotlb = mr->iommu_ops->translate(mr, addr, is_write);
1526 if (iotlb.perm != IOMMU_NONE) {
1527 n->notify(n, &iotlb);
1530 /* if (2^64 - MR size) < granularity, it's possible to get an
1531 * infinite loop here. This should catch such a wraparound */
1532 if ((addr + granularity) < addr) {
1538 void memory_region_unregister_iommu_notifier(Notifier *n)
1543 void memory_region_notify_iommu(MemoryRegion *mr,
1544 IOMMUTLBEntry entry)
1546 assert(memory_region_is_iommu(mr));
1547 notifier_list_notify(&mr->iommu_notify, &entry);
1550 void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
1552 uint8_t mask = 1 << client;
1553 uint8_t old_logging;
1555 assert(client == DIRTY_MEMORY_VGA);
1556 old_logging = mr->vga_logging_count;
1557 mr->vga_logging_count += log ? 1 : -1;
1558 if (!!old_logging == !!mr->vga_logging_count) {
1562 memory_region_transaction_begin();
1563 mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask);
1564 memory_region_update_pending |= mr->enabled;
1565 memory_region_transaction_commit();
1568 bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr,
1569 hwaddr size, unsigned client)
1571 assert(mr->ram_block);
1572 return cpu_physical_memory_get_dirty(memory_region_get_ram_addr(mr) + addr,
1576 void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
1579 assert(mr->ram_block);
1580 cpu_physical_memory_set_dirty_range(memory_region_get_ram_addr(mr) + addr,
1582 memory_region_get_dirty_log_mask(mr));
1585 bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,
1586 hwaddr size, unsigned client)
1588 assert(mr->ram_block);
1589 return cpu_physical_memory_test_and_clear_dirty(
1590 memory_region_get_ram_addr(mr) + addr, size, client);
1594 void memory_region_sync_dirty_bitmap(MemoryRegion *mr)
1599 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1600 FlatView *view = address_space_get_flatview(as);
1601 FOR_EACH_FLAT_RANGE(fr, view) {
1603 MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
1606 flatview_unref(view);
1610 void memory_region_set_readonly(MemoryRegion *mr, bool readonly)
1612 if (mr->readonly != readonly) {
1613 memory_region_transaction_begin();
1614 mr->readonly = readonly;
1615 memory_region_update_pending |= mr->enabled;
1616 memory_region_transaction_commit();
1620 void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode)
1622 if (mr->romd_mode != romd_mode) {
1623 memory_region_transaction_begin();
1624 mr->romd_mode = romd_mode;
1625 memory_region_update_pending |= mr->enabled;
1626 memory_region_transaction_commit();
1630 void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
1631 hwaddr size, unsigned client)
1633 assert(mr->ram_block);
1634 cpu_physical_memory_test_and_clear_dirty(
1635 memory_region_get_ram_addr(mr) + addr, size, client);
1638 int memory_region_get_fd(MemoryRegion *mr)
1641 return memory_region_get_fd(mr->alias);
1644 assert(mr->ram_block);
1646 return qemu_get_ram_fd(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK);
1649 void *memory_region_get_ram_ptr(MemoryRegion *mr)
1652 uint64_t offset = 0;
1656 offset += mr->alias_offset;
1659 assert(mr->ram_block);
1660 ptr = qemu_get_ram_ptr(mr->ram_block,
1661 memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK);
1664 return ptr + offset;
1667 ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr)
1669 return mr->ram_block ? mr->ram_block->offset : RAM_ADDR_INVALID;
1672 void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, Error **errp)
1674 assert(mr->ram_block);
1676 qemu_ram_resize(mr->ram_block, newsize, errp);
1679 static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpace *as)
1683 CoalescedMemoryRange *cmr;
1685 MemoryRegionSection section;
1687 view = address_space_get_flatview(as);
1688 FOR_EACH_FLAT_RANGE(fr, view) {
1690 section = (MemoryRegionSection) {
1691 .address_space = as,
1692 .offset_within_address_space = int128_get64(fr->addr.start),
1693 .size = fr->addr.size,
1696 MEMORY_LISTENER_CALL(coalesced_mmio_del, Reverse, §ion,
1697 int128_get64(fr->addr.start),
1698 int128_get64(fr->addr.size));
1699 QTAILQ_FOREACH(cmr, &mr->coalesced, link) {
1700 tmp = addrrange_shift(cmr->addr,
1701 int128_sub(fr->addr.start,
1702 int128_make64(fr->offset_in_region)));
1703 if (!addrrange_intersects(tmp, fr->addr)) {
1706 tmp = addrrange_intersection(tmp, fr->addr);
1707 MEMORY_LISTENER_CALL(coalesced_mmio_add, Forward, §ion,
1708 int128_get64(tmp.start),
1709 int128_get64(tmp.size));
1713 flatview_unref(view);
1716 static void memory_region_update_coalesced_range(MemoryRegion *mr)
1720 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1721 memory_region_update_coalesced_range_as(mr, as);
1725 void memory_region_set_coalescing(MemoryRegion *mr)
1727 memory_region_clear_coalescing(mr);
1728 memory_region_add_coalescing(mr, 0, int128_get64(mr->size));
1731 void memory_region_add_coalescing(MemoryRegion *mr,
1735 CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr));
1737 cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size));
1738 QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link);
1739 memory_region_update_coalesced_range(mr);
1740 memory_region_set_flush_coalesced(mr);
1743 void memory_region_clear_coalescing(MemoryRegion *mr)
1745 CoalescedMemoryRange *cmr;
1746 bool updated = false;
1748 qemu_flush_coalesced_mmio_buffer();
1749 mr->flush_coalesced_mmio = false;
1751 while (!QTAILQ_EMPTY(&mr->coalesced)) {
1752 cmr = QTAILQ_FIRST(&mr->coalesced);
1753 QTAILQ_REMOVE(&mr->coalesced, cmr, link);
1759 memory_region_update_coalesced_range(mr);
1763 void memory_region_set_flush_coalesced(MemoryRegion *mr)
1765 mr->flush_coalesced_mmio = true;
1768 void memory_region_clear_flush_coalesced(MemoryRegion *mr)
1770 qemu_flush_coalesced_mmio_buffer();
1771 if (QTAILQ_EMPTY(&mr->coalesced)) {
1772 mr->flush_coalesced_mmio = false;
1776 void memory_region_set_global_locking(MemoryRegion *mr)
1778 mr->global_locking = true;
1781 void memory_region_clear_global_locking(MemoryRegion *mr)
1783 mr->global_locking = false;
1786 static bool userspace_eventfd_warning;
1788 void memory_region_add_eventfd(MemoryRegion *mr,
1795 MemoryRegionIoeventfd mrfd = {
1796 .addr.start = int128_make64(addr),
1797 .addr.size = int128_make64(size),
1798 .match_data = match_data,
1804 if (kvm_enabled() && (!(kvm_eventfds_enabled() ||
1805 userspace_eventfd_warning))) {
1806 userspace_eventfd_warning = true;
1807 error_report("Using eventfd without MMIO binding in KVM. "
1808 "Suboptimal performance expected");
1812 adjust_endianness(mr, &mrfd.data, size);
1814 memory_region_transaction_begin();
1815 for (i = 0; i < mr->ioeventfd_nb; ++i) {
1816 if (memory_region_ioeventfd_before(mrfd, mr->ioeventfds[i])) {
1821 mr->ioeventfds = g_realloc(mr->ioeventfds,
1822 sizeof(*mr->ioeventfds) * mr->ioeventfd_nb);
1823 memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i],
1824 sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i));
1825 mr->ioeventfds[i] = mrfd;
1826 ioeventfd_update_pending |= mr->enabled;
1827 memory_region_transaction_commit();
1830 void memory_region_del_eventfd(MemoryRegion *mr,
1837 MemoryRegionIoeventfd mrfd = {
1838 .addr.start = int128_make64(addr),
1839 .addr.size = int128_make64(size),
1840 .match_data = match_data,
1847 adjust_endianness(mr, &mrfd.data, size);
1849 memory_region_transaction_begin();
1850 for (i = 0; i < mr->ioeventfd_nb; ++i) {
1851 if (memory_region_ioeventfd_equal(mrfd, mr->ioeventfds[i])) {
1855 assert(i != mr->ioeventfd_nb);
1856 memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1],
1857 sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1)));
1859 mr->ioeventfds = g_realloc(mr->ioeventfds,
1860 sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1);
1861 ioeventfd_update_pending |= mr->enabled;
1862 memory_region_transaction_commit();
1865 static void memory_region_update_container_subregions(MemoryRegion *subregion)
1867 hwaddr offset = subregion->addr;
1868 MemoryRegion *mr = subregion->container;
1869 MemoryRegion *other;
1871 memory_region_transaction_begin();
1873 memory_region_ref(subregion);
1874 QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
1875 if (subregion->may_overlap || other->may_overlap) {
1878 if (int128_ge(int128_make64(offset),
1879 int128_add(int128_make64(other->addr), other->size))
1880 || int128_le(int128_add(int128_make64(offset), subregion->size),
1881 int128_make64(other->addr))) {
1885 printf("warning: subregion collision %llx/%llx (%s) "
1886 "vs %llx/%llx (%s)\n",
1887 (unsigned long long)offset,
1888 (unsigned long long)int128_get64(subregion->size),
1890 (unsigned long long)other->addr,
1891 (unsigned long long)int128_get64(other->size),
1895 QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
1896 if (subregion->priority >= other->priority) {
1897 QTAILQ_INSERT_BEFORE(other, subregion, subregions_link);
1901 QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link);
1903 memory_region_update_pending |= mr->enabled && subregion->enabled;
1904 memory_region_transaction_commit();
1907 static void memory_region_add_subregion_common(MemoryRegion *mr,
1909 MemoryRegion *subregion)
1911 assert(!subregion->container);
1912 subregion->container = mr;
1913 subregion->addr = offset;
1914 memory_region_update_container_subregions(subregion);
1917 void memory_region_add_subregion(MemoryRegion *mr,
1919 MemoryRegion *subregion)
1921 subregion->may_overlap = false;
1922 subregion->priority = 0;
1923 memory_region_add_subregion_common(mr, offset, subregion);
1926 void memory_region_add_subregion_overlap(MemoryRegion *mr,
1928 MemoryRegion *subregion,
1931 subregion->may_overlap = true;
1932 subregion->priority = priority;
1933 memory_region_add_subregion_common(mr, offset, subregion);
1936 void memory_region_del_subregion(MemoryRegion *mr,
1937 MemoryRegion *subregion)
1939 memory_region_transaction_begin();
1940 assert(subregion->container == mr);
1941 subregion->container = NULL;
1942 QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link);
1943 memory_region_unref(subregion);
1944 memory_region_update_pending |= mr->enabled && subregion->enabled;
1945 memory_region_transaction_commit();
1948 void memory_region_set_enabled(MemoryRegion *mr, bool enabled)
1950 if (enabled == mr->enabled) {
1953 memory_region_transaction_begin();
1954 mr->enabled = enabled;
1955 memory_region_update_pending = true;
1956 memory_region_transaction_commit();
1959 void memory_region_set_size(MemoryRegion *mr, uint64_t size)
1961 Int128 s = int128_make64(size);
1963 if (size == UINT64_MAX) {
1966 if (int128_eq(s, mr->size)) {
1969 memory_region_transaction_begin();
1971 memory_region_update_pending = true;
1972 memory_region_transaction_commit();
1975 static void memory_region_readd_subregion(MemoryRegion *mr)
1977 MemoryRegion *container = mr->container;
1980 memory_region_transaction_begin();
1981 memory_region_ref(mr);
1982 memory_region_del_subregion(container, mr);
1983 mr->container = container;
1984 memory_region_update_container_subregions(mr);
1985 memory_region_unref(mr);
1986 memory_region_transaction_commit();
1990 void memory_region_set_address(MemoryRegion *mr, hwaddr addr)
1992 if (addr != mr->addr) {
1994 memory_region_readd_subregion(mr);
1998 void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset)
2002 if (offset == mr->alias_offset) {
2006 memory_region_transaction_begin();
2007 mr->alias_offset = offset;
2008 memory_region_update_pending |= mr->enabled;
2009 memory_region_transaction_commit();
2012 uint64_t memory_region_get_alignment(const MemoryRegion *mr)
2017 static int cmp_flatrange_addr(const void *addr_, const void *fr_)
2019 const AddrRange *addr = addr_;
2020 const FlatRange *fr = fr_;
2022 if (int128_le(addrrange_end(*addr), fr->addr.start)) {
2024 } else if (int128_ge(addr->start, addrrange_end(fr->addr))) {
2030 static FlatRange *flatview_lookup(FlatView *view, AddrRange addr)
2032 return bsearch(&addr, view->ranges, view->nr,
2033 sizeof(FlatRange), cmp_flatrange_addr);
2036 bool memory_region_is_mapped(MemoryRegion *mr)
2038 return mr->container ? true : false;
2041 /* Same as memory_region_find, but it does not add a reference to the
2042 * returned region. It must be called from an RCU critical section.
2044 static MemoryRegionSection memory_region_find_rcu(MemoryRegion *mr,
2045 hwaddr addr, uint64_t size)
2047 MemoryRegionSection ret = { .mr = NULL };
2055 for (root = mr; root->container; ) {
2056 root = root->container;
2060 as = memory_region_to_address_space(root);
2064 range = addrrange_make(int128_make64(addr), int128_make64(size));
2066 view = atomic_rcu_read(&as->current_map);
2067 fr = flatview_lookup(view, range);
2072 while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) {
2077 ret.address_space = as;
2078 range = addrrange_intersection(range, fr->addr);
2079 ret.offset_within_region = fr->offset_in_region;
2080 ret.offset_within_region += int128_get64(int128_sub(range.start,
2082 ret.size = range.size;
2083 ret.offset_within_address_space = int128_get64(range.start);
2084 ret.readonly = fr->readonly;
2088 MemoryRegionSection memory_region_find(MemoryRegion *mr,
2089 hwaddr addr, uint64_t size)
2091 MemoryRegionSection ret;
2093 ret = memory_region_find_rcu(mr, addr, size);
2095 memory_region_ref(ret.mr);
2101 bool memory_region_present(MemoryRegion *container, hwaddr addr)
2106 mr = memory_region_find_rcu(container, addr, 1).mr;
2108 return mr && mr != container;
2111 void address_space_sync_dirty_bitmap(AddressSpace *as)
2116 view = address_space_get_flatview(as);
2117 FOR_EACH_FLAT_RANGE(fr, view) {
2118 MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
2120 flatview_unref(view);
2123 void memory_global_dirty_log_start(void)
2125 global_dirty_log = true;
2127 MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward);
2129 /* Refresh DIRTY_LOG_MIGRATION bit. */
2130 memory_region_transaction_begin();
2131 memory_region_update_pending = true;
2132 memory_region_transaction_commit();
2135 void memory_global_dirty_log_stop(void)
2137 global_dirty_log = false;
2139 /* Refresh DIRTY_LOG_MIGRATION bit. */
2140 memory_region_transaction_begin();
2141 memory_region_update_pending = true;
2142 memory_region_transaction_commit();
2144 MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse);
2147 static void listener_add_address_space(MemoryListener *listener,
2153 if (listener->address_space_filter
2154 && listener->address_space_filter != as) {
2158 if (listener->begin) {
2159 listener->begin(listener);
2161 if (global_dirty_log) {
2162 if (listener->log_global_start) {
2163 listener->log_global_start(listener);
2167 view = address_space_get_flatview(as);
2168 FOR_EACH_FLAT_RANGE(fr, view) {
2169 MemoryRegionSection section = {
2171 .address_space = as,
2172 .offset_within_region = fr->offset_in_region,
2173 .size = fr->addr.size,
2174 .offset_within_address_space = int128_get64(fr->addr.start),
2175 .readonly = fr->readonly,
2177 if (fr->dirty_log_mask && listener->log_start) {
2178 listener->log_start(listener, §ion, 0, fr->dirty_log_mask);
2180 if (listener->region_add) {
2181 listener->region_add(listener, §ion);
2184 if (listener->commit) {
2185 listener->commit(listener);
2187 flatview_unref(view);
2190 void memory_listener_register(MemoryListener *listener, AddressSpace *filter)
2192 MemoryListener *other = NULL;
2195 listener->address_space_filter = filter;
2196 if (QTAILQ_EMPTY(&memory_listeners)
2197 || listener->priority >= QTAILQ_LAST(&memory_listeners,
2198 memory_listeners)->priority) {
2199 QTAILQ_INSERT_TAIL(&memory_listeners, listener, link);
2201 QTAILQ_FOREACH(other, &memory_listeners, link) {
2202 if (listener->priority < other->priority) {
2206 QTAILQ_INSERT_BEFORE(other, listener, link);
2209 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
2210 listener_add_address_space(listener, as);
2214 void memory_listener_unregister(MemoryListener *listener)
2216 QTAILQ_REMOVE(&memory_listeners, listener, link);
2219 void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name)
2221 memory_region_ref(root);
2222 memory_region_transaction_begin();
2225 as->malloced = false;
2226 as->current_map = g_new(FlatView, 1);
2227 flatview_init(as->current_map);
2228 as->ioeventfd_nb = 0;
2229 as->ioeventfds = NULL;
2230 QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link);
2231 as->name = g_strdup(name ? name : "anonymous");
2232 address_space_init_dispatch(as);
2233 memory_region_update_pending |= root->enabled;
2234 memory_region_transaction_commit();
2237 static void do_address_space_destroy(AddressSpace *as)
2239 MemoryListener *listener;
2240 bool do_free = as->malloced;
2242 address_space_destroy_dispatch(as);
2244 QTAILQ_FOREACH(listener, &memory_listeners, link) {
2245 assert(listener->address_space_filter != as);
2248 flatview_unref(as->current_map);
2250 g_free(as->ioeventfds);
2251 memory_region_unref(as->root);
2257 AddressSpace *address_space_init_shareable(MemoryRegion *root, const char *name)
2261 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
2262 if (root == as->root && as->malloced) {
2268 as = g_malloc0(sizeof *as);
2269 address_space_init(as, root, name);
2270 as->malloced = true;
2274 void address_space_destroy(AddressSpace *as)
2276 MemoryRegion *root = as->root;
2279 if (as->ref_count) {
2282 /* Flush out anything from MemoryListeners listening in on this */
2283 memory_region_transaction_begin();
2285 memory_region_transaction_commit();
2286 QTAILQ_REMOVE(&address_spaces, as, address_spaces_link);
2287 address_space_unregister(as);
2289 /* At this point, as->dispatch and as->current_map are dummy
2290 * entries that the guest should never use. Wait for the old
2291 * values to expire before freeing the data.
2294 call_rcu(as, do_address_space_destroy, rcu);
2297 typedef struct MemoryRegionList MemoryRegionList;
2299 struct MemoryRegionList {
2300 const MemoryRegion *mr;
2301 QTAILQ_ENTRY(MemoryRegionList) queue;
2304 typedef QTAILQ_HEAD(queue, MemoryRegionList) MemoryRegionListHead;
2306 static void mtree_print_mr(fprintf_function mon_printf, void *f,
2307 const MemoryRegion *mr, unsigned int level,
2309 MemoryRegionListHead *alias_print_queue)
2311 MemoryRegionList *new_ml, *ml, *next_ml;
2312 MemoryRegionListHead submr_print_queue;
2313 const MemoryRegion *submr;
2320 for (i = 0; i < level; i++) {
2325 MemoryRegionList *ml;
2328 /* check if the alias is already in the queue */
2329 QTAILQ_FOREACH(ml, alias_print_queue, queue) {
2330 if (ml->mr == mr->alias) {
2336 ml = g_new(MemoryRegionList, 1);
2338 QTAILQ_INSERT_TAIL(alias_print_queue, ml, queue);
2340 mon_printf(f, TARGET_FMT_plx "-" TARGET_FMT_plx
2341 " (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx
2342 "-" TARGET_FMT_plx "%s\n",
2345 + (int128_nz(mr->size) ?
2346 (hwaddr)int128_get64(int128_sub(mr->size,
2347 int128_one())) : 0),
2349 mr->romd_mode ? 'R' : '-',
2350 !mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W'
2352 memory_region_name(mr),
2353 memory_region_name(mr->alias),
2356 + (int128_nz(mr->size) ?
2357 (hwaddr)int128_get64(int128_sub(mr->size,
2358 int128_one())) : 0),
2359 mr->enabled ? "" : " [disabled]");
2362 TARGET_FMT_plx "-" TARGET_FMT_plx " (prio %d, %c%c): %s%s\n",
2365 + (int128_nz(mr->size) ?
2366 (hwaddr)int128_get64(int128_sub(mr->size,
2367 int128_one())) : 0),
2369 mr->romd_mode ? 'R' : '-',
2370 !mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W'
2372 memory_region_name(mr),
2373 mr->enabled ? "" : " [disabled]");
2376 QTAILQ_INIT(&submr_print_queue);
2378 QTAILQ_FOREACH(submr, &mr->subregions, subregions_link) {
2379 new_ml = g_new(MemoryRegionList, 1);
2381 QTAILQ_FOREACH(ml, &submr_print_queue, queue) {
2382 if (new_ml->mr->addr < ml->mr->addr ||
2383 (new_ml->mr->addr == ml->mr->addr &&
2384 new_ml->mr->priority > ml->mr->priority)) {
2385 QTAILQ_INSERT_BEFORE(ml, new_ml, queue);
2391 QTAILQ_INSERT_TAIL(&submr_print_queue, new_ml, queue);
2395 QTAILQ_FOREACH(ml, &submr_print_queue, queue) {
2396 mtree_print_mr(mon_printf, f, ml->mr, level + 1, base + mr->addr,
2400 QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, queue, next_ml) {
2405 void mtree_info(fprintf_function mon_printf, void *f)
2407 MemoryRegionListHead ml_head;
2408 MemoryRegionList *ml, *ml2;
2411 QTAILQ_INIT(&ml_head);
2413 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
2414 mon_printf(f, "address-space: %s\n", as->name);
2415 mtree_print_mr(mon_printf, f, as->root, 1, 0, &ml_head);
2416 mon_printf(f, "\n");
2419 /* print aliased regions */
2420 QTAILQ_FOREACH(ml, &ml_head, queue) {
2421 mon_printf(f, "memory-region: %s\n", memory_region_name(ml->mr));
2422 mtree_print_mr(mon_printf, f, ml->mr, 1, 0, &ml_head);
2423 mon_printf(f, "\n");
2426 QTAILQ_FOREACH_SAFE(ml, &ml_head, queue, ml2) {
2431 static const TypeInfo memory_region_info = {
2432 .parent = TYPE_OBJECT,
2433 .name = TYPE_MEMORY_REGION,
2434 .instance_size = sizeof(MemoryRegion),
2435 .instance_init = memory_region_initfn,
2436 .instance_finalize = memory_region_finalize,
2439 static void memory_register_types(void)
2441 type_register_static(&memory_region_info);
2444 type_init(memory_register_types)