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.
17 #include "exec-memory.h"
23 #include "memory-internal.h"
25 unsigned memory_region_transaction_depth
= 0;
26 static bool global_dirty_log
= false;
28 static QTAILQ_HEAD(memory_listeners
, MemoryListener
) memory_listeners
29 = QTAILQ_HEAD_INITIALIZER(memory_listeners
);
31 static QTAILQ_HEAD(, AddressSpace
) address_spaces
32 = QTAILQ_HEAD_INITIALIZER(address_spaces
);
34 typedef struct AddrRange AddrRange
;
37 * Note using signed integers limits us to physical addresses at most
38 * 63 bits wide. They are needed for negative offsetting in aliases
39 * (large MemoryRegion::alias_offset).
46 static AddrRange
addrrange_make(Int128 start
, Int128 size
)
48 return (AddrRange
) { start
, size
};
51 static bool addrrange_equal(AddrRange r1
, AddrRange r2
)
53 return int128_eq(r1
.start
, r2
.start
) && int128_eq(r1
.size
, r2
.size
);
56 static Int128
addrrange_end(AddrRange r
)
58 return int128_add(r
.start
, r
.size
);
61 static AddrRange
addrrange_shift(AddrRange range
, Int128 delta
)
63 int128_addto(&range
.start
, delta
);
67 static bool addrrange_contains(AddrRange range
, Int128 addr
)
69 return int128_ge(addr
, range
.start
)
70 && int128_lt(addr
, addrrange_end(range
));
73 static bool addrrange_intersects(AddrRange r1
, AddrRange r2
)
75 return addrrange_contains(r1
, r2
.start
)
76 || addrrange_contains(r2
, r1
.start
);
79 static AddrRange
addrrange_intersection(AddrRange r1
, AddrRange r2
)
81 Int128 start
= int128_max(r1
.start
, r2
.start
);
82 Int128 end
= int128_min(addrrange_end(r1
), addrrange_end(r2
));
83 return addrrange_make(start
, int128_sub(end
, start
));
86 enum ListenerDirection
{ Forward
, Reverse
};
88 static bool memory_listener_match(MemoryListener
*listener
,
89 MemoryRegionSection
*section
)
91 return !listener
->address_space_filter
92 || listener
->address_space_filter
== section
->address_space
;
95 #define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
97 MemoryListener *_listener; \
99 switch (_direction) { \
101 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
102 if (_listener->_callback) { \
103 _listener->_callback(_listener, ##_args); \
108 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
109 memory_listeners, link) { \
110 if (_listener->_callback) { \
111 _listener->_callback(_listener, ##_args); \
120 #define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \
122 MemoryListener *_listener; \
124 switch (_direction) { \
126 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
127 if (_listener->_callback \
128 && memory_listener_match(_listener, _section)) { \
129 _listener->_callback(_listener, _section, ##_args); \
134 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
135 memory_listeners, link) { \
136 if (_listener->_callback \
137 && memory_listener_match(_listener, _section)) { \
138 _listener->_callback(_listener, _section, ##_args); \
147 #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \
148 MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \
150 .address_space = (as), \
151 .offset_within_region = (fr)->offset_in_region, \
152 .size = int128_get64((fr)->addr.size), \
153 .offset_within_address_space = int128_get64((fr)->addr.start), \
154 .readonly = (fr)->readonly, \
157 struct CoalescedMemoryRange
{
159 QTAILQ_ENTRY(CoalescedMemoryRange
) link
;
162 struct MemoryRegionIoeventfd
{
169 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a
,
170 MemoryRegionIoeventfd b
)
172 if (int128_lt(a
.addr
.start
, b
.addr
.start
)) {
174 } else if (int128_gt(a
.addr
.start
, b
.addr
.start
)) {
176 } else if (int128_lt(a
.addr
.size
, b
.addr
.size
)) {
178 } else if (int128_gt(a
.addr
.size
, b
.addr
.size
)) {
180 } else if (a
.match_data
< b
.match_data
) {
182 } else if (a
.match_data
> b
.match_data
) {
184 } else if (a
.match_data
) {
185 if (a
.data
< b
.data
) {
187 } else if (a
.data
> b
.data
) {
193 } else if (a
.e
> b
.e
) {
199 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a
,
200 MemoryRegionIoeventfd b
)
202 return !memory_region_ioeventfd_before(a
, b
)
203 && !memory_region_ioeventfd_before(b
, a
);
206 typedef struct FlatRange FlatRange
;
207 typedef struct FlatView FlatView
;
209 /* Range of memory in the global map. Addresses are absolute. */
212 target_phys_addr_t offset_in_region
;
214 uint8_t dirty_log_mask
;
219 /* Flattened global view of current active memory hierarchy. Kept in sorted
225 unsigned nr_allocated
;
228 typedef struct AddressSpaceOps AddressSpaceOps
;
230 #define FOR_EACH_FLAT_RANGE(var, view) \
231 for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
233 static bool flatrange_equal(FlatRange
*a
, FlatRange
*b
)
235 return a
->mr
== b
->mr
236 && addrrange_equal(a
->addr
, b
->addr
)
237 && a
->offset_in_region
== b
->offset_in_region
238 && a
->readable
== b
->readable
239 && a
->readonly
== b
->readonly
;
242 static void flatview_init(FlatView
*view
)
246 view
->nr_allocated
= 0;
249 /* Insert a range into a given position. Caller is responsible for maintaining
252 static void flatview_insert(FlatView
*view
, unsigned pos
, FlatRange
*range
)
254 if (view
->nr
== view
->nr_allocated
) {
255 view
->nr_allocated
= MAX(2 * view
->nr
, 10);
256 view
->ranges
= g_realloc(view
->ranges
,
257 view
->nr_allocated
* sizeof(*view
->ranges
));
259 memmove(view
->ranges
+ pos
+ 1, view
->ranges
+ pos
,
260 (view
->nr
- pos
) * sizeof(FlatRange
));
261 view
->ranges
[pos
] = *range
;
265 static void flatview_destroy(FlatView
*view
)
267 g_free(view
->ranges
);
270 static bool can_merge(FlatRange
*r1
, FlatRange
*r2
)
272 return int128_eq(addrrange_end(r1
->addr
), r2
->addr
.start
)
274 && int128_eq(int128_add(int128_make64(r1
->offset_in_region
),
276 int128_make64(r2
->offset_in_region
))
277 && r1
->dirty_log_mask
== r2
->dirty_log_mask
278 && r1
->readable
== r2
->readable
279 && r1
->readonly
== r2
->readonly
;
282 /* Attempt to simplify a view by merging ajacent ranges */
283 static void flatview_simplify(FlatView
*view
)
288 while (i
< view
->nr
) {
291 && can_merge(&view
->ranges
[j
-1], &view
->ranges
[j
])) {
292 int128_addto(&view
->ranges
[i
].addr
.size
, view
->ranges
[j
].addr
.size
);
296 memmove(&view
->ranges
[i
], &view
->ranges
[j
],
297 (view
->nr
- j
) * sizeof(view
->ranges
[j
]));
302 static void memory_region_read_accessor(void *opaque
,
303 target_phys_addr_t addr
,
309 MemoryRegion
*mr
= opaque
;
312 if (mr
->flush_coalesced_mmio
) {
313 qemu_flush_coalesced_mmio_buffer();
315 tmp
= mr
->ops
->read(mr
->opaque
, addr
, size
);
316 *value
|= (tmp
& mask
) << shift
;
319 static void memory_region_write_accessor(void *opaque
,
320 target_phys_addr_t addr
,
326 MemoryRegion
*mr
= opaque
;
329 if (mr
->flush_coalesced_mmio
) {
330 qemu_flush_coalesced_mmio_buffer();
332 tmp
= (*value
>> shift
) & mask
;
333 mr
->ops
->write(mr
->opaque
, addr
, tmp
, size
);
336 static void access_with_adjusted_size(target_phys_addr_t addr
,
339 unsigned access_size_min
,
340 unsigned access_size_max
,
341 void (*access
)(void *opaque
,
342 target_phys_addr_t addr
,
349 uint64_t access_mask
;
350 unsigned access_size
;
353 if (!access_size_min
) {
356 if (!access_size_max
) {
359 access_size
= MAX(MIN(size
, access_size_max
), access_size_min
);
360 access_mask
= -1ULL >> (64 - access_size
* 8);
361 for (i
= 0; i
< size
; i
+= access_size
) {
362 /* FIXME: big-endian support */
363 access(opaque
, addr
+ i
, value
, access_size
, i
* 8, access_mask
);
367 static const MemoryRegionPortio
*find_portio(MemoryRegion
*mr
, uint64_t offset
,
368 unsigned width
, bool write
)
370 const MemoryRegionPortio
*mrp
;
372 for (mrp
= mr
->ops
->old_portio
; mrp
->size
; ++mrp
) {
373 if (offset
>= mrp
->offset
&& offset
< mrp
->offset
+ mrp
->len
374 && width
== mrp
->size
375 && (write
? (bool)mrp
->write
: (bool)mrp
->read
)) {
382 static void memory_region_iorange_read(IORange
*iorange
,
387 MemoryRegionIORange
*mrio
388 = container_of(iorange
, MemoryRegionIORange
, iorange
);
389 MemoryRegion
*mr
= mrio
->mr
;
391 offset
+= mrio
->offset
;
392 if (mr
->ops
->old_portio
) {
393 const MemoryRegionPortio
*mrp
= find_portio(mr
, offset
- mrio
->offset
,
396 *data
= ((uint64_t)1 << (width
* 8)) - 1;
398 *data
= mrp
->read(mr
->opaque
, offset
);
399 } else if (width
== 2) {
400 mrp
= find_portio(mr
, offset
- mrio
->offset
, 1, false);
402 *data
= mrp
->read(mr
->opaque
, offset
) |
403 (mrp
->read(mr
->opaque
, offset
+ 1) << 8);
408 access_with_adjusted_size(offset
, data
, width
,
409 mr
->ops
->impl
.min_access_size
,
410 mr
->ops
->impl
.max_access_size
,
411 memory_region_read_accessor
, mr
);
414 static void memory_region_iorange_write(IORange
*iorange
,
419 MemoryRegionIORange
*mrio
420 = container_of(iorange
, MemoryRegionIORange
, iorange
);
421 MemoryRegion
*mr
= mrio
->mr
;
423 offset
+= mrio
->offset
;
424 if (mr
->ops
->old_portio
) {
425 const MemoryRegionPortio
*mrp
= find_portio(mr
, offset
- mrio
->offset
,
429 mrp
->write(mr
->opaque
, offset
, data
);
430 } else if (width
== 2) {
431 mrp
= find_portio(mr
, offset
- mrio
->offset
, 1, true);
433 mrp
->write(mr
->opaque
, offset
, data
& 0xff);
434 mrp
->write(mr
->opaque
, offset
+ 1, data
>> 8);
438 access_with_adjusted_size(offset
, &data
, width
,
439 mr
->ops
->impl
.min_access_size
,
440 mr
->ops
->impl
.max_access_size
,
441 memory_region_write_accessor
, mr
);
444 static void memory_region_iorange_destructor(IORange
*iorange
)
446 g_free(container_of(iorange
, MemoryRegionIORange
, iorange
));
449 const IORangeOps memory_region_iorange_ops
= {
450 .read
= memory_region_iorange_read
,
451 .write
= memory_region_iorange_write
,
452 .destructor
= memory_region_iorange_destructor
,
455 static AddressSpace
*memory_region_to_address_space(MemoryRegion
*mr
)
462 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
463 if (mr
== as
->root
) {
470 /* Render a memory region into the global view. Ranges in @view obscure
473 static void render_memory_region(FlatView
*view
,
479 MemoryRegion
*subregion
;
481 target_phys_addr_t offset_in_region
;
491 int128_addto(&base
, int128_make64(mr
->addr
));
492 readonly
|= mr
->readonly
;
494 tmp
= addrrange_make(base
, mr
->size
);
496 if (!addrrange_intersects(tmp
, clip
)) {
500 clip
= addrrange_intersection(tmp
, clip
);
503 int128_subfrom(&base
, int128_make64(mr
->alias
->addr
));
504 int128_subfrom(&base
, int128_make64(mr
->alias_offset
));
505 render_memory_region(view
, mr
->alias
, base
, clip
, readonly
);
509 /* Render subregions in priority order. */
510 QTAILQ_FOREACH(subregion
, &mr
->subregions
, subregions_link
) {
511 render_memory_region(view
, subregion
, base
, clip
, readonly
);
514 if (!mr
->terminates
) {
518 offset_in_region
= int128_get64(int128_sub(clip
.start
, base
));
522 /* Render the region itself into any gaps left by the current view. */
523 for (i
= 0; i
< view
->nr
&& int128_nz(remain
); ++i
) {
524 if (int128_ge(base
, addrrange_end(view
->ranges
[i
].addr
))) {
527 if (int128_lt(base
, view
->ranges
[i
].addr
.start
)) {
528 now
= int128_min(remain
,
529 int128_sub(view
->ranges
[i
].addr
.start
, base
));
531 fr
.offset_in_region
= offset_in_region
;
532 fr
.addr
= addrrange_make(base
, now
);
533 fr
.dirty_log_mask
= mr
->dirty_log_mask
;
534 fr
.readable
= mr
->readable
;
535 fr
.readonly
= readonly
;
536 flatview_insert(view
, i
, &fr
);
538 int128_addto(&base
, now
);
539 offset_in_region
+= int128_get64(now
);
540 int128_subfrom(&remain
, now
);
542 if (int128_eq(base
, view
->ranges
[i
].addr
.start
)) {
543 now
= int128_min(remain
, view
->ranges
[i
].addr
.size
);
544 int128_addto(&base
, now
);
545 offset_in_region
+= int128_get64(now
);
546 int128_subfrom(&remain
, now
);
549 if (int128_nz(remain
)) {
551 fr
.offset_in_region
= offset_in_region
;
552 fr
.addr
= addrrange_make(base
, remain
);
553 fr
.dirty_log_mask
= mr
->dirty_log_mask
;
554 fr
.readable
= mr
->readable
;
555 fr
.readonly
= readonly
;
556 flatview_insert(view
, i
, &fr
);
560 /* Render a memory topology into a list of disjoint absolute ranges. */
561 static FlatView
generate_memory_topology(MemoryRegion
*mr
)
565 flatview_init(&view
);
567 render_memory_region(&view
, mr
, int128_zero(),
568 addrrange_make(int128_zero(), int128_2_64()), false);
569 flatview_simplify(&view
);
574 static void address_space_add_del_ioeventfds(AddressSpace
*as
,
575 MemoryRegionIoeventfd
*fds_new
,
577 MemoryRegionIoeventfd
*fds_old
,
581 MemoryRegionIoeventfd
*fd
;
582 MemoryRegionSection section
;
584 /* Generate a symmetric difference of the old and new fd sets, adding
585 * and deleting as necessary.
589 while (iold
< fds_old_nb
|| inew
< fds_new_nb
) {
590 if (iold
< fds_old_nb
591 && (inew
== fds_new_nb
592 || memory_region_ioeventfd_before(fds_old
[iold
],
595 section
= (MemoryRegionSection
) {
597 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
598 .size
= int128_get64(fd
->addr
.size
),
600 MEMORY_LISTENER_CALL(eventfd_del
, Forward
, §ion
,
601 fd
->match_data
, fd
->data
, fd
->e
);
603 } else if (inew
< fds_new_nb
604 && (iold
== fds_old_nb
605 || memory_region_ioeventfd_before(fds_new
[inew
],
608 section
= (MemoryRegionSection
) {
610 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
611 .size
= int128_get64(fd
->addr
.size
),
613 MEMORY_LISTENER_CALL(eventfd_add
, Reverse
, §ion
,
614 fd
->match_data
, fd
->data
, fd
->e
);
623 static void address_space_update_ioeventfds(AddressSpace
*as
)
626 unsigned ioeventfd_nb
= 0;
627 MemoryRegionIoeventfd
*ioeventfds
= NULL
;
631 FOR_EACH_FLAT_RANGE(fr
, as
->current_map
) {
632 for (i
= 0; i
< fr
->mr
->ioeventfd_nb
; ++i
) {
633 tmp
= addrrange_shift(fr
->mr
->ioeventfds
[i
].addr
,
634 int128_sub(fr
->addr
.start
,
635 int128_make64(fr
->offset_in_region
)));
636 if (addrrange_intersects(fr
->addr
, tmp
)) {
638 ioeventfds
= g_realloc(ioeventfds
,
639 ioeventfd_nb
* sizeof(*ioeventfds
));
640 ioeventfds
[ioeventfd_nb
-1] = fr
->mr
->ioeventfds
[i
];
641 ioeventfds
[ioeventfd_nb
-1].addr
= tmp
;
646 address_space_add_del_ioeventfds(as
, ioeventfds
, ioeventfd_nb
,
647 as
->ioeventfds
, as
->ioeventfd_nb
);
649 g_free(as
->ioeventfds
);
650 as
->ioeventfds
= ioeventfds
;
651 as
->ioeventfd_nb
= ioeventfd_nb
;
654 static void address_space_update_topology_pass(AddressSpace
*as
,
660 FlatRange
*frold
, *frnew
;
662 /* Generate a symmetric difference of the old and new memory maps.
663 * Kill ranges in the old map, and instantiate ranges in the new map.
666 while (iold
< old_view
.nr
|| inew
< new_view
.nr
) {
667 if (iold
< old_view
.nr
) {
668 frold
= &old_view
.ranges
[iold
];
672 if (inew
< new_view
.nr
) {
673 frnew
= &new_view
.ranges
[inew
];
680 || int128_lt(frold
->addr
.start
, frnew
->addr
.start
)
681 || (int128_eq(frold
->addr
.start
, frnew
->addr
.start
)
682 && !flatrange_equal(frold
, frnew
)))) {
683 /* In old, but (not in new, or in new but attributes changed). */
686 MEMORY_LISTENER_UPDATE_REGION(frold
, as
, Reverse
, region_del
);
690 } else if (frold
&& frnew
&& flatrange_equal(frold
, frnew
)) {
691 /* In both (logging may have changed) */
694 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_nop
);
695 if (frold
->dirty_log_mask
&& !frnew
->dirty_log_mask
) {
696 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Reverse
, log_stop
);
697 } else if (frnew
->dirty_log_mask
&& !frold
->dirty_log_mask
) {
698 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, log_start
);
708 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_add
);
717 static void address_space_update_topology(AddressSpace
*as
)
719 FlatView old_view
= *as
->current_map
;
720 FlatView new_view
= generate_memory_topology(as
->root
);
722 address_space_update_topology_pass(as
, old_view
, new_view
, false);
723 address_space_update_topology_pass(as
, old_view
, new_view
, true);
725 *as
->current_map
= new_view
;
726 flatview_destroy(&old_view
);
727 address_space_update_ioeventfds(as
);
730 void memory_region_transaction_begin(void)
732 qemu_flush_coalesced_mmio_buffer();
733 ++memory_region_transaction_depth
;
736 void memory_region_transaction_commit(void)
740 assert(memory_region_transaction_depth
);
741 --memory_region_transaction_depth
;
742 if (!memory_region_transaction_depth
) {
743 MEMORY_LISTENER_CALL_GLOBAL(begin
, Forward
);
745 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
746 address_space_update_topology(as
);
749 MEMORY_LISTENER_CALL_GLOBAL(commit
, Forward
);
753 static void memory_region_destructor_none(MemoryRegion
*mr
)
757 static void memory_region_destructor_ram(MemoryRegion
*mr
)
759 qemu_ram_free(mr
->ram_addr
);
762 static void memory_region_destructor_ram_from_ptr(MemoryRegion
*mr
)
764 qemu_ram_free_from_ptr(mr
->ram_addr
);
767 static void memory_region_destructor_iomem(MemoryRegion
*mr
)
771 static void memory_region_destructor_rom_device(MemoryRegion
*mr
)
773 qemu_ram_free(mr
->ram_addr
& TARGET_PAGE_MASK
);
776 static bool memory_region_wrong_endianness(MemoryRegion
*mr
)
778 #ifdef TARGET_WORDS_BIGENDIAN
779 return mr
->ops
->endianness
== DEVICE_LITTLE_ENDIAN
;
781 return mr
->ops
->endianness
== DEVICE_BIG_ENDIAN
;
785 void memory_region_init(MemoryRegion
*mr
,
791 mr
->size
= int128_make64(size
);
792 if (size
== UINT64_MAX
) {
793 mr
->size
= int128_2_64();
798 mr
->terminates
= false;
801 mr
->readonly
= false;
802 mr
->rom_device
= false;
803 mr
->destructor
= memory_region_destructor_none
;
805 mr
->may_overlap
= false;
807 QTAILQ_INIT(&mr
->subregions
);
808 memset(&mr
->subregions_link
, 0, sizeof mr
->subregions_link
);
809 QTAILQ_INIT(&mr
->coalesced
);
810 mr
->name
= g_strdup(name
);
811 mr
->dirty_log_mask
= 0;
812 mr
->ioeventfd_nb
= 0;
813 mr
->ioeventfds
= NULL
;
814 mr
->flush_coalesced_mmio
= false;
817 static bool memory_region_access_valid(MemoryRegion
*mr
,
818 target_phys_addr_t addr
,
822 if (mr
->ops
->valid
.accepts
823 && !mr
->ops
->valid
.accepts(mr
->opaque
, addr
, size
, is_write
)) {
827 if (!mr
->ops
->valid
.unaligned
&& (addr
& (size
- 1))) {
831 /* Treat zero as compatibility all valid */
832 if (!mr
->ops
->valid
.max_access_size
) {
836 if (size
> mr
->ops
->valid
.max_access_size
837 || size
< mr
->ops
->valid
.min_access_size
) {
843 static uint64_t memory_region_dispatch_read1(MemoryRegion
*mr
,
844 target_phys_addr_t addr
,
849 if (!memory_region_access_valid(mr
, addr
, size
, false)) {
850 return -1U; /* FIXME: better signalling */
853 if (!mr
->ops
->read
) {
854 return mr
->ops
->old_mmio
.read
[bitops_ffsl(size
)](mr
->opaque
, addr
);
857 /* FIXME: support unaligned access */
858 access_with_adjusted_size(addr
, &data
, size
,
859 mr
->ops
->impl
.min_access_size
,
860 mr
->ops
->impl
.max_access_size
,
861 memory_region_read_accessor
, mr
);
866 static void adjust_endianness(MemoryRegion
*mr
, uint64_t *data
, unsigned size
)
868 if (memory_region_wrong_endianness(mr
)) {
873 *data
= bswap16(*data
);
876 *data
= bswap32(*data
);
884 static uint64_t memory_region_dispatch_read(MemoryRegion
*mr
,
885 target_phys_addr_t addr
,
890 ret
= memory_region_dispatch_read1(mr
, addr
, size
);
891 adjust_endianness(mr
, &ret
, size
);
895 static void memory_region_dispatch_write(MemoryRegion
*mr
,
896 target_phys_addr_t addr
,
900 if (!memory_region_access_valid(mr
, addr
, size
, true)) {
901 return; /* FIXME: better signalling */
904 adjust_endianness(mr
, &data
, size
);
906 if (!mr
->ops
->write
) {
907 mr
->ops
->old_mmio
.write
[bitops_ffsl(size
)](mr
->opaque
, addr
, data
);
911 /* FIXME: support unaligned access */
912 access_with_adjusted_size(addr
, &data
, size
,
913 mr
->ops
->impl
.min_access_size
,
914 mr
->ops
->impl
.max_access_size
,
915 memory_region_write_accessor
, mr
);
918 void memory_region_init_io(MemoryRegion
*mr
,
919 const MemoryRegionOps
*ops
,
924 memory_region_init(mr
, name
, size
);
927 mr
->terminates
= true;
928 mr
->destructor
= memory_region_destructor_iomem
;
929 mr
->ram_addr
= ~(ram_addr_t
)0;
932 void memory_region_init_ram(MemoryRegion
*mr
,
936 memory_region_init(mr
, name
, size
);
938 mr
->terminates
= true;
939 mr
->destructor
= memory_region_destructor_ram
;
940 mr
->ram_addr
= qemu_ram_alloc(size
, mr
);
943 void memory_region_init_ram_ptr(MemoryRegion
*mr
,
948 memory_region_init(mr
, name
, size
);
950 mr
->terminates
= true;
951 mr
->destructor
= memory_region_destructor_ram_from_ptr
;
952 mr
->ram_addr
= qemu_ram_alloc_from_ptr(size
, ptr
, mr
);
955 void memory_region_init_alias(MemoryRegion
*mr
,
958 target_phys_addr_t offset
,
961 memory_region_init(mr
, name
, size
);
963 mr
->alias_offset
= offset
;
966 void memory_region_init_rom_device(MemoryRegion
*mr
,
967 const MemoryRegionOps
*ops
,
972 memory_region_init(mr
, name
, size
);
975 mr
->terminates
= true;
976 mr
->rom_device
= true;
977 mr
->destructor
= memory_region_destructor_rom_device
;
978 mr
->ram_addr
= qemu_ram_alloc(size
, mr
);
981 static uint64_t invalid_read(void *opaque
, target_phys_addr_t addr
,
984 MemoryRegion
*mr
= opaque
;
986 if (!mr
->warning_printed
) {
987 fprintf(stderr
, "Invalid read from memory region %s\n", mr
->name
);
988 mr
->warning_printed
= true;
993 static void invalid_write(void *opaque
, target_phys_addr_t addr
, uint64_t data
,
996 MemoryRegion
*mr
= opaque
;
998 if (!mr
->warning_printed
) {
999 fprintf(stderr
, "Invalid write to memory region %s\n", mr
->name
);
1000 mr
->warning_printed
= true;
1004 static const MemoryRegionOps reservation_ops
= {
1005 .read
= invalid_read
,
1006 .write
= invalid_write
,
1007 .endianness
= DEVICE_NATIVE_ENDIAN
,
1010 void memory_region_init_reservation(MemoryRegion
*mr
,
1014 memory_region_init_io(mr
, &reservation_ops
, mr
, name
, size
);
1017 void memory_region_destroy(MemoryRegion
*mr
)
1019 assert(QTAILQ_EMPTY(&mr
->subregions
));
1021 memory_region_clear_coalescing(mr
);
1022 g_free((char *)mr
->name
);
1023 g_free(mr
->ioeventfds
);
1026 uint64_t memory_region_size(MemoryRegion
*mr
)
1028 if (int128_eq(mr
->size
, int128_2_64())) {
1031 return int128_get64(mr
->size
);
1034 const char *memory_region_name(MemoryRegion
*mr
)
1039 bool memory_region_is_ram(MemoryRegion
*mr
)
1044 bool memory_region_is_logging(MemoryRegion
*mr
)
1046 return mr
->dirty_log_mask
;
1049 bool memory_region_is_rom(MemoryRegion
*mr
)
1051 return mr
->ram
&& mr
->readonly
;
1054 void memory_region_set_log(MemoryRegion
*mr
, bool log
, unsigned client
)
1056 uint8_t mask
= 1 << client
;
1058 memory_region_transaction_begin();
1059 mr
->dirty_log_mask
= (mr
->dirty_log_mask
& ~mask
) | (log
* mask
);
1060 memory_region_transaction_commit();
1063 bool memory_region_get_dirty(MemoryRegion
*mr
, target_phys_addr_t addr
,
1064 target_phys_addr_t size
, unsigned client
)
1066 assert(mr
->terminates
);
1067 return cpu_physical_memory_get_dirty(mr
->ram_addr
+ addr
, size
,
1071 void memory_region_set_dirty(MemoryRegion
*mr
, target_phys_addr_t addr
,
1072 target_phys_addr_t size
)
1074 assert(mr
->terminates
);
1075 return cpu_physical_memory_set_dirty_range(mr
->ram_addr
+ addr
, size
, -1);
1078 void memory_region_sync_dirty_bitmap(MemoryRegion
*mr
)
1083 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1084 FOR_EACH_FLAT_RANGE(fr
, as
->current_map
) {
1086 MEMORY_LISTENER_UPDATE_REGION(fr
, as
, Forward
, log_sync
);
1092 void memory_region_set_readonly(MemoryRegion
*mr
, bool readonly
)
1094 if (mr
->readonly
!= readonly
) {
1095 memory_region_transaction_begin();
1096 mr
->readonly
= readonly
;
1097 memory_region_transaction_commit();
1101 void memory_region_rom_device_set_readable(MemoryRegion
*mr
, bool readable
)
1103 if (mr
->readable
!= readable
) {
1104 memory_region_transaction_begin();
1105 mr
->readable
= readable
;
1106 memory_region_transaction_commit();
1110 void memory_region_reset_dirty(MemoryRegion
*mr
, target_phys_addr_t addr
,
1111 target_phys_addr_t size
, unsigned client
)
1113 assert(mr
->terminates
);
1114 cpu_physical_memory_reset_dirty(mr
->ram_addr
+ addr
,
1115 mr
->ram_addr
+ addr
+ size
,
1119 void *memory_region_get_ram_ptr(MemoryRegion
*mr
)
1122 return memory_region_get_ram_ptr(mr
->alias
) + mr
->alias_offset
;
1125 assert(mr
->terminates
);
1127 return qemu_get_ram_ptr(mr
->ram_addr
& TARGET_PAGE_MASK
);
1130 static void memory_region_update_coalesced_range_as(MemoryRegion
*mr
, AddressSpace
*as
)
1133 CoalescedMemoryRange
*cmr
;
1135 MemoryRegionSection section
;
1137 FOR_EACH_FLAT_RANGE(fr
, as
->current_map
) {
1139 section
= (MemoryRegionSection
) {
1140 .address_space
= as
,
1141 .offset_within_address_space
= int128_get64(fr
->addr
.start
),
1142 .size
= int128_get64(fr
->addr
.size
),
1145 MEMORY_LISTENER_CALL(coalesced_mmio_del
, Reverse
, §ion
,
1146 int128_get64(fr
->addr
.start
),
1147 int128_get64(fr
->addr
.size
));
1148 QTAILQ_FOREACH(cmr
, &mr
->coalesced
, link
) {
1149 tmp
= addrrange_shift(cmr
->addr
,
1150 int128_sub(fr
->addr
.start
,
1151 int128_make64(fr
->offset_in_region
)));
1152 if (!addrrange_intersects(tmp
, fr
->addr
)) {
1155 tmp
= addrrange_intersection(tmp
, fr
->addr
);
1156 MEMORY_LISTENER_CALL(coalesced_mmio_add
, Forward
, §ion
,
1157 int128_get64(tmp
.start
),
1158 int128_get64(tmp
.size
));
1164 static void memory_region_update_coalesced_range(MemoryRegion
*mr
)
1168 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1169 memory_region_update_coalesced_range_as(mr
, as
);
1173 void memory_region_set_coalescing(MemoryRegion
*mr
)
1175 memory_region_clear_coalescing(mr
);
1176 memory_region_add_coalescing(mr
, 0, int128_get64(mr
->size
));
1179 void memory_region_add_coalescing(MemoryRegion
*mr
,
1180 target_phys_addr_t offset
,
1183 CoalescedMemoryRange
*cmr
= g_malloc(sizeof(*cmr
));
1185 cmr
->addr
= addrrange_make(int128_make64(offset
), int128_make64(size
));
1186 QTAILQ_INSERT_TAIL(&mr
->coalesced
, cmr
, link
);
1187 memory_region_update_coalesced_range(mr
);
1188 memory_region_set_flush_coalesced(mr
);
1191 void memory_region_clear_coalescing(MemoryRegion
*mr
)
1193 CoalescedMemoryRange
*cmr
;
1195 qemu_flush_coalesced_mmio_buffer();
1196 mr
->flush_coalesced_mmio
= false;
1198 while (!QTAILQ_EMPTY(&mr
->coalesced
)) {
1199 cmr
= QTAILQ_FIRST(&mr
->coalesced
);
1200 QTAILQ_REMOVE(&mr
->coalesced
, cmr
, link
);
1203 memory_region_update_coalesced_range(mr
);
1206 void memory_region_set_flush_coalesced(MemoryRegion
*mr
)
1208 mr
->flush_coalesced_mmio
= true;
1211 void memory_region_clear_flush_coalesced(MemoryRegion
*mr
)
1213 qemu_flush_coalesced_mmio_buffer();
1214 if (QTAILQ_EMPTY(&mr
->coalesced
)) {
1215 mr
->flush_coalesced_mmio
= false;
1219 void memory_region_add_eventfd(MemoryRegion
*mr
,
1220 target_phys_addr_t addr
,
1226 MemoryRegionIoeventfd mrfd
= {
1227 .addr
.start
= int128_make64(addr
),
1228 .addr
.size
= int128_make64(size
),
1229 .match_data
= match_data
,
1235 memory_region_transaction_begin();
1236 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
1237 if (memory_region_ioeventfd_before(mrfd
, mr
->ioeventfds
[i
])) {
1242 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
1243 sizeof(*mr
->ioeventfds
) * mr
->ioeventfd_nb
);
1244 memmove(&mr
->ioeventfds
[i
+1], &mr
->ioeventfds
[i
],
1245 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
-1 - i
));
1246 mr
->ioeventfds
[i
] = mrfd
;
1247 memory_region_transaction_commit();
1250 void memory_region_del_eventfd(MemoryRegion
*mr
,
1251 target_phys_addr_t addr
,
1257 MemoryRegionIoeventfd mrfd
= {
1258 .addr
.start
= int128_make64(addr
),
1259 .addr
.size
= int128_make64(size
),
1260 .match_data
= match_data
,
1266 memory_region_transaction_begin();
1267 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
1268 if (memory_region_ioeventfd_equal(mrfd
, mr
->ioeventfds
[i
])) {
1272 assert(i
!= mr
->ioeventfd_nb
);
1273 memmove(&mr
->ioeventfds
[i
], &mr
->ioeventfds
[i
+1],
1274 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
- (i
+1)));
1276 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
1277 sizeof(*mr
->ioeventfds
)*mr
->ioeventfd_nb
+ 1);
1278 memory_region_transaction_commit();
1281 static void memory_region_add_subregion_common(MemoryRegion
*mr
,
1282 target_phys_addr_t offset
,
1283 MemoryRegion
*subregion
)
1285 MemoryRegion
*other
;
1287 memory_region_transaction_begin();
1289 assert(!subregion
->parent
);
1290 subregion
->parent
= mr
;
1291 subregion
->addr
= offset
;
1292 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
1293 if (subregion
->may_overlap
|| other
->may_overlap
) {
1296 if (int128_gt(int128_make64(offset
),
1297 int128_add(int128_make64(other
->addr
), other
->size
))
1298 || int128_le(int128_add(int128_make64(offset
), subregion
->size
),
1299 int128_make64(other
->addr
))) {
1303 printf("warning: subregion collision %llx/%llx (%s) "
1304 "vs %llx/%llx (%s)\n",
1305 (unsigned long long)offset
,
1306 (unsigned long long)int128_get64(subregion
->size
),
1308 (unsigned long long)other
->addr
,
1309 (unsigned long long)int128_get64(other
->size
),
1313 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
1314 if (subregion
->priority
>= other
->priority
) {
1315 QTAILQ_INSERT_BEFORE(other
, subregion
, subregions_link
);
1319 QTAILQ_INSERT_TAIL(&mr
->subregions
, subregion
, subregions_link
);
1321 memory_region_transaction_commit();
1325 void memory_region_add_subregion(MemoryRegion
*mr
,
1326 target_phys_addr_t offset
,
1327 MemoryRegion
*subregion
)
1329 subregion
->may_overlap
= false;
1330 subregion
->priority
= 0;
1331 memory_region_add_subregion_common(mr
, offset
, subregion
);
1334 void memory_region_add_subregion_overlap(MemoryRegion
*mr
,
1335 target_phys_addr_t offset
,
1336 MemoryRegion
*subregion
,
1339 subregion
->may_overlap
= true;
1340 subregion
->priority
= priority
;
1341 memory_region_add_subregion_common(mr
, offset
, subregion
);
1344 void memory_region_del_subregion(MemoryRegion
*mr
,
1345 MemoryRegion
*subregion
)
1347 memory_region_transaction_begin();
1348 assert(subregion
->parent
== mr
);
1349 subregion
->parent
= NULL
;
1350 QTAILQ_REMOVE(&mr
->subregions
, subregion
, subregions_link
);
1351 memory_region_transaction_commit();
1354 void memory_region_set_enabled(MemoryRegion
*mr
, bool enabled
)
1356 if (enabled
== mr
->enabled
) {
1359 memory_region_transaction_begin();
1360 mr
->enabled
= enabled
;
1361 memory_region_transaction_commit();
1364 void memory_region_set_address(MemoryRegion
*mr
, target_phys_addr_t addr
)
1366 MemoryRegion
*parent
= mr
->parent
;
1367 unsigned priority
= mr
->priority
;
1368 bool may_overlap
= mr
->may_overlap
;
1370 if (addr
== mr
->addr
|| !parent
) {
1375 memory_region_transaction_begin();
1376 memory_region_del_subregion(parent
, mr
);
1378 memory_region_add_subregion_overlap(parent
, addr
, mr
, priority
);
1380 memory_region_add_subregion(parent
, addr
, mr
);
1382 memory_region_transaction_commit();
1385 void memory_region_set_alias_offset(MemoryRegion
*mr
, target_phys_addr_t offset
)
1389 if (offset
== mr
->alias_offset
) {
1393 memory_region_transaction_begin();
1394 mr
->alias_offset
= offset
;
1395 memory_region_transaction_commit();
1398 ram_addr_t
memory_region_get_ram_addr(MemoryRegion
*mr
)
1400 return mr
->ram_addr
;
1403 static int cmp_flatrange_addr(const void *addr_
, const void *fr_
)
1405 const AddrRange
*addr
= addr_
;
1406 const FlatRange
*fr
= fr_
;
1408 if (int128_le(addrrange_end(*addr
), fr
->addr
.start
)) {
1410 } else if (int128_ge(addr
->start
, addrrange_end(fr
->addr
))) {
1416 static FlatRange
*address_space_lookup(AddressSpace
*as
, AddrRange addr
)
1418 return bsearch(&addr
, as
->current_map
->ranges
, as
->current_map
->nr
,
1419 sizeof(FlatRange
), cmp_flatrange_addr
);
1422 MemoryRegionSection
memory_region_find(MemoryRegion
*address_space
,
1423 target_phys_addr_t addr
, uint64_t size
)
1425 AddressSpace
*as
= memory_region_to_address_space(address_space
);
1426 AddrRange range
= addrrange_make(int128_make64(addr
),
1427 int128_make64(size
));
1428 FlatRange
*fr
= address_space_lookup(as
, range
);
1429 MemoryRegionSection ret
= { .mr
= NULL
, .size
= 0 };
1435 while (fr
> as
->current_map
->ranges
1436 && addrrange_intersects(fr
[-1].addr
, range
)) {
1441 range
= addrrange_intersection(range
, fr
->addr
);
1442 ret
.offset_within_region
= fr
->offset_in_region
;
1443 ret
.offset_within_region
+= int128_get64(int128_sub(range
.start
,
1445 ret
.size
= int128_get64(range
.size
);
1446 ret
.offset_within_address_space
= int128_get64(range
.start
);
1447 ret
.readonly
= fr
->readonly
;
1451 void memory_global_sync_dirty_bitmap(MemoryRegion
*address_space
)
1453 AddressSpace
*as
= memory_region_to_address_space(address_space
);
1456 FOR_EACH_FLAT_RANGE(fr
, as
->current_map
) {
1457 MEMORY_LISTENER_UPDATE_REGION(fr
, as
, Forward
, log_sync
);
1461 void memory_global_dirty_log_start(void)
1463 global_dirty_log
= true;
1464 MEMORY_LISTENER_CALL_GLOBAL(log_global_start
, Forward
);
1467 void memory_global_dirty_log_stop(void)
1469 global_dirty_log
= false;
1470 MEMORY_LISTENER_CALL_GLOBAL(log_global_stop
, Reverse
);
1473 static void listener_add_address_space(MemoryListener
*listener
,
1478 if (listener
->address_space_filter
1479 && listener
->address_space_filter
!= as
) {
1483 if (global_dirty_log
) {
1484 if (listener
->log_global_start
) {
1485 listener
->log_global_start(listener
);
1489 FOR_EACH_FLAT_RANGE(fr
, as
->current_map
) {
1490 MemoryRegionSection section
= {
1492 .address_space
= as
,
1493 .offset_within_region
= fr
->offset_in_region
,
1494 .size
= int128_get64(fr
->addr
.size
),
1495 .offset_within_address_space
= int128_get64(fr
->addr
.start
),
1496 .readonly
= fr
->readonly
,
1498 if (listener
->region_add
) {
1499 listener
->region_add(listener
, §ion
);
1504 void memory_listener_register(MemoryListener
*listener
, AddressSpace
*filter
)
1506 MemoryListener
*other
= NULL
;
1509 listener
->address_space_filter
= filter
;
1510 if (QTAILQ_EMPTY(&memory_listeners
)
1511 || listener
->priority
>= QTAILQ_LAST(&memory_listeners
,
1512 memory_listeners
)->priority
) {
1513 QTAILQ_INSERT_TAIL(&memory_listeners
, listener
, link
);
1515 QTAILQ_FOREACH(other
, &memory_listeners
, link
) {
1516 if (listener
->priority
< other
->priority
) {
1520 QTAILQ_INSERT_BEFORE(other
, listener
, link
);
1523 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1524 listener_add_address_space(listener
, as
);
1528 void memory_listener_unregister(MemoryListener
*listener
)
1530 QTAILQ_REMOVE(&memory_listeners
, listener
, link
);
1533 void address_space_init(AddressSpace
*as
, MemoryRegion
*root
)
1535 memory_region_transaction_begin();
1537 as
->current_map
= g_new(FlatView
, 1);
1538 flatview_init(as
->current_map
);
1539 QTAILQ_INSERT_TAIL(&address_spaces
, as
, address_spaces_link
);
1541 memory_region_transaction_commit();
1542 address_space_init_dispatch(as
);
1545 uint64_t io_mem_read(MemoryRegion
*mr
, target_phys_addr_t addr
, unsigned size
)
1547 return memory_region_dispatch_read(mr
, addr
, size
);
1550 void io_mem_write(MemoryRegion
*mr
, target_phys_addr_t addr
,
1551 uint64_t val
, unsigned size
)
1553 memory_region_dispatch_write(mr
, addr
, val
, size
);
1556 typedef struct MemoryRegionList MemoryRegionList
;
1558 struct MemoryRegionList
{
1559 const MemoryRegion
*mr
;
1561 QTAILQ_ENTRY(MemoryRegionList
) queue
;
1564 typedef QTAILQ_HEAD(queue
, MemoryRegionList
) MemoryRegionListHead
;
1566 static void mtree_print_mr(fprintf_function mon_printf
, void *f
,
1567 const MemoryRegion
*mr
, unsigned int level
,
1568 target_phys_addr_t base
,
1569 MemoryRegionListHead
*alias_print_queue
)
1571 MemoryRegionList
*new_ml
, *ml
, *next_ml
;
1572 MemoryRegionListHead submr_print_queue
;
1573 const MemoryRegion
*submr
;
1580 for (i
= 0; i
< level
; i
++) {
1585 MemoryRegionList
*ml
;
1588 /* check if the alias is already in the queue */
1589 QTAILQ_FOREACH(ml
, alias_print_queue
, queue
) {
1590 if (ml
->mr
== mr
->alias
&& !ml
->printed
) {
1596 ml
= g_new(MemoryRegionList
, 1);
1598 ml
->printed
= false;
1599 QTAILQ_INSERT_TAIL(alias_print_queue
, ml
, queue
);
1601 mon_printf(f
, TARGET_FMT_plx
"-" TARGET_FMT_plx
1602 " (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx
1603 "-" TARGET_FMT_plx
"\n",
1606 + (target_phys_addr_t
)int128_get64(mr
->size
) - 1,
1608 mr
->readable
? 'R' : '-',
1609 !mr
->readonly
&& !(mr
->rom_device
&& mr
->readable
) ? 'W'
1615 + (target_phys_addr_t
)int128_get64(mr
->size
) - 1);
1618 TARGET_FMT_plx
"-" TARGET_FMT_plx
" (prio %d, %c%c): %s\n",
1621 + (target_phys_addr_t
)int128_get64(mr
->size
) - 1,
1623 mr
->readable
? 'R' : '-',
1624 !mr
->readonly
&& !(mr
->rom_device
&& mr
->readable
) ? 'W'
1629 QTAILQ_INIT(&submr_print_queue
);
1631 QTAILQ_FOREACH(submr
, &mr
->subregions
, subregions_link
) {
1632 new_ml
= g_new(MemoryRegionList
, 1);
1634 QTAILQ_FOREACH(ml
, &submr_print_queue
, queue
) {
1635 if (new_ml
->mr
->addr
< ml
->mr
->addr
||
1636 (new_ml
->mr
->addr
== ml
->mr
->addr
&&
1637 new_ml
->mr
->priority
> ml
->mr
->priority
)) {
1638 QTAILQ_INSERT_BEFORE(ml
, new_ml
, queue
);
1644 QTAILQ_INSERT_TAIL(&submr_print_queue
, new_ml
, queue
);
1648 QTAILQ_FOREACH(ml
, &submr_print_queue
, queue
) {
1649 mtree_print_mr(mon_printf
, f
, ml
->mr
, level
+ 1, base
+ mr
->addr
,
1653 QTAILQ_FOREACH_SAFE(ml
, &submr_print_queue
, queue
, next_ml
) {
1658 void mtree_info(fprintf_function mon_printf
, void *f
)
1660 MemoryRegionListHead ml_head
;
1661 MemoryRegionList
*ml
, *ml2
;
1664 QTAILQ_INIT(&ml_head
);
1666 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1670 mon_printf(f
, "%s\n", as
->name
);
1671 mtree_print_mr(mon_printf
, f
, as
->root
, 0, 0, &ml_head
);
1674 mon_printf(f
, "aliases\n");
1675 /* print aliased regions */
1676 QTAILQ_FOREACH(ml
, &ml_head
, queue
) {
1678 mon_printf(f
, "%s\n", ml
->mr
->name
);
1679 mtree_print_mr(mon_printf
, f
, ml
->mr
, 0, 0, &ml_head
);
1683 QTAILQ_FOREACH_SAFE(ml
, &ml_head
, queue
, ml2
) {