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 typedef struct AddrRange AddrRange
;
34 * Note using signed integers limits us to physical addresses at most
35 * 63 bits wide. They are needed for negative offsetting in aliases
36 * (large MemoryRegion::alias_offset).
43 static AddrRange
addrrange_make(Int128 start
, Int128 size
)
45 return (AddrRange
) { start
, size
};
48 static bool addrrange_equal(AddrRange r1
, AddrRange r2
)
50 return int128_eq(r1
.start
, r2
.start
) && int128_eq(r1
.size
, r2
.size
);
53 static Int128
addrrange_end(AddrRange r
)
55 return int128_add(r
.start
, r
.size
);
58 static AddrRange
addrrange_shift(AddrRange range
, Int128 delta
)
60 int128_addto(&range
.start
, delta
);
64 static bool addrrange_contains(AddrRange range
, Int128 addr
)
66 return int128_ge(addr
, range
.start
)
67 && int128_lt(addr
, addrrange_end(range
));
70 static bool addrrange_intersects(AddrRange r1
, AddrRange r2
)
72 return addrrange_contains(r1
, r2
.start
)
73 || addrrange_contains(r2
, r1
.start
);
76 static AddrRange
addrrange_intersection(AddrRange r1
, AddrRange r2
)
78 Int128 start
= int128_max(r1
.start
, r2
.start
);
79 Int128 end
= int128_min(addrrange_end(r1
), addrrange_end(r2
));
80 return addrrange_make(start
, int128_sub(end
, start
));
83 enum ListenerDirection
{ Forward
, Reverse
};
85 static bool memory_listener_match(MemoryListener
*listener
,
86 MemoryRegionSection
*section
)
88 return !listener
->address_space_filter
89 || listener
->address_space_filter
== section
->address_space
;
92 #define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
94 MemoryListener *_listener; \
96 switch (_direction) { \
98 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
99 _listener->_callback(_listener, ##_args); \
103 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
104 memory_listeners, link) { \
105 _listener->_callback(_listener, ##_args); \
113 #define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \
115 MemoryListener *_listener; \
117 switch (_direction) { \
119 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
120 if (memory_listener_match(_listener, _section)) { \
121 _listener->_callback(_listener, _section, ##_args); \
126 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
127 memory_listeners, link) { \
128 if (memory_listener_match(_listener, _section)) { \
129 _listener->_callback(_listener, _section, ##_args); \
138 #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \
139 MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \
141 .address_space = (as)->root, \
142 .offset_within_region = (fr)->offset_in_region, \
143 .size = int128_get64((fr)->addr.size), \
144 .offset_within_address_space = int128_get64((fr)->addr.start), \
145 .readonly = (fr)->readonly, \
148 struct CoalescedMemoryRange
{
150 QTAILQ_ENTRY(CoalescedMemoryRange
) link
;
153 struct MemoryRegionIoeventfd
{
160 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a
,
161 MemoryRegionIoeventfd b
)
163 if (int128_lt(a
.addr
.start
, b
.addr
.start
)) {
165 } else if (int128_gt(a
.addr
.start
, b
.addr
.start
)) {
167 } else if (int128_lt(a
.addr
.size
, b
.addr
.size
)) {
169 } else if (int128_gt(a
.addr
.size
, b
.addr
.size
)) {
171 } else if (a
.match_data
< b
.match_data
) {
173 } else if (a
.match_data
> b
.match_data
) {
175 } else if (a
.match_data
) {
176 if (a
.data
< b
.data
) {
178 } else if (a
.data
> b
.data
) {
184 } else if (a
.e
> b
.e
) {
190 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a
,
191 MemoryRegionIoeventfd b
)
193 return !memory_region_ioeventfd_before(a
, b
)
194 && !memory_region_ioeventfd_before(b
, a
);
197 typedef struct FlatRange FlatRange
;
198 typedef struct FlatView FlatView
;
200 /* Range of memory in the global map. Addresses are absolute. */
203 target_phys_addr_t offset_in_region
;
205 uint8_t dirty_log_mask
;
210 /* Flattened global view of current active memory hierarchy. Kept in sorted
216 unsigned nr_allocated
;
219 typedef struct AddressSpace AddressSpace
;
220 typedef struct AddressSpaceOps AddressSpaceOps
;
222 /* A system address space - I/O, memory, etc. */
223 struct AddressSpace
{
225 FlatView
*current_map
;
227 MemoryRegionIoeventfd
*ioeventfds
;
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 AddressSpace address_space_memory
;
369 static const MemoryRegionPortio
*find_portio(MemoryRegion
*mr
, uint64_t offset
,
370 unsigned width
, bool write
)
372 const MemoryRegionPortio
*mrp
;
374 for (mrp
= mr
->ops
->old_portio
; mrp
->size
; ++mrp
) {
375 if (offset
>= mrp
->offset
&& offset
< mrp
->offset
+ mrp
->len
376 && width
== mrp
->size
377 && (write
? (bool)mrp
->write
: (bool)mrp
->read
)) {
384 static void memory_region_iorange_read(IORange
*iorange
,
389 MemoryRegionIORange
*mrio
390 = container_of(iorange
, MemoryRegionIORange
, iorange
);
391 MemoryRegion
*mr
= mrio
->mr
;
393 offset
+= mrio
->offset
;
394 if (mr
->ops
->old_portio
) {
395 const MemoryRegionPortio
*mrp
= find_portio(mr
, offset
- mrio
->offset
,
398 *data
= ((uint64_t)1 << (width
* 8)) - 1;
400 *data
= mrp
->read(mr
->opaque
, offset
);
401 } else if (width
== 2) {
402 mrp
= find_portio(mr
, offset
- mrio
->offset
, 1, false);
404 *data
= mrp
->read(mr
->opaque
, offset
) |
405 (mrp
->read(mr
->opaque
, offset
+ 1) << 8);
410 access_with_adjusted_size(offset
, data
, width
,
411 mr
->ops
->impl
.min_access_size
,
412 mr
->ops
->impl
.max_access_size
,
413 memory_region_read_accessor
, mr
);
416 static void memory_region_iorange_write(IORange
*iorange
,
421 MemoryRegionIORange
*mrio
422 = container_of(iorange
, MemoryRegionIORange
, iorange
);
423 MemoryRegion
*mr
= mrio
->mr
;
425 offset
+= mrio
->offset
;
426 if (mr
->ops
->old_portio
) {
427 const MemoryRegionPortio
*mrp
= find_portio(mr
, offset
- mrio
->offset
,
431 mrp
->write(mr
->opaque
, offset
, data
);
432 } else if (width
== 2) {
433 mrp
= find_portio(mr
, offset
- mrio
->offset
, 1, true);
435 mrp
->write(mr
->opaque
, offset
, data
& 0xff);
436 mrp
->write(mr
->opaque
, offset
+ 1, data
>> 8);
440 access_with_adjusted_size(offset
, &data
, width
,
441 mr
->ops
->impl
.min_access_size
,
442 mr
->ops
->impl
.max_access_size
,
443 memory_region_write_accessor
, mr
);
446 static void memory_region_iorange_destructor(IORange
*iorange
)
448 g_free(container_of(iorange
, MemoryRegionIORange
, iorange
));
451 const IORangeOps memory_region_iorange_ops
= {
452 .read
= memory_region_iorange_read
,
453 .write
= memory_region_iorange_write
,
454 .destructor
= memory_region_iorange_destructor
,
457 static AddressSpace address_space_io
;
459 static AddressSpace
*memory_region_to_address_space(MemoryRegion
*mr
)
464 if (mr
== address_space_memory
.root
) {
465 return &address_space_memory
;
467 if (mr
== address_space_io
.root
) {
468 return &address_space_io
;
473 /* Render a memory region into the global view. Ranges in @view obscure
476 static void render_memory_region(FlatView
*view
,
482 MemoryRegion
*subregion
;
484 target_phys_addr_t offset_in_region
;
494 int128_addto(&base
, int128_make64(mr
->addr
));
495 readonly
|= mr
->readonly
;
497 tmp
= addrrange_make(base
, mr
->size
);
499 if (!addrrange_intersects(tmp
, clip
)) {
503 clip
= addrrange_intersection(tmp
, clip
);
506 int128_subfrom(&base
, int128_make64(mr
->alias
->addr
));
507 int128_subfrom(&base
, int128_make64(mr
->alias_offset
));
508 render_memory_region(view
, mr
->alias
, base
, clip
, readonly
);
512 /* Render subregions in priority order. */
513 QTAILQ_FOREACH(subregion
, &mr
->subregions
, subregions_link
) {
514 render_memory_region(view
, subregion
, base
, clip
, readonly
);
517 if (!mr
->terminates
) {
521 offset_in_region
= int128_get64(int128_sub(clip
.start
, base
));
525 /* Render the region itself into any gaps left by the current view. */
526 for (i
= 0; i
< view
->nr
&& int128_nz(remain
); ++i
) {
527 if (int128_ge(base
, addrrange_end(view
->ranges
[i
].addr
))) {
530 if (int128_lt(base
, view
->ranges
[i
].addr
.start
)) {
531 now
= int128_min(remain
,
532 int128_sub(view
->ranges
[i
].addr
.start
, base
));
534 fr
.offset_in_region
= offset_in_region
;
535 fr
.addr
= addrrange_make(base
, now
);
536 fr
.dirty_log_mask
= mr
->dirty_log_mask
;
537 fr
.readable
= mr
->readable
;
538 fr
.readonly
= readonly
;
539 flatview_insert(view
, i
, &fr
);
541 int128_addto(&base
, now
);
542 offset_in_region
+= int128_get64(now
);
543 int128_subfrom(&remain
, now
);
545 if (int128_eq(base
, view
->ranges
[i
].addr
.start
)) {
546 now
= int128_min(remain
, view
->ranges
[i
].addr
.size
);
547 int128_addto(&base
, now
);
548 offset_in_region
+= int128_get64(now
);
549 int128_subfrom(&remain
, now
);
552 if (int128_nz(remain
)) {
554 fr
.offset_in_region
= offset_in_region
;
555 fr
.addr
= addrrange_make(base
, remain
);
556 fr
.dirty_log_mask
= mr
->dirty_log_mask
;
557 fr
.readable
= mr
->readable
;
558 fr
.readonly
= readonly
;
559 flatview_insert(view
, i
, &fr
);
563 /* Render a memory topology into a list of disjoint absolute ranges. */
564 static FlatView
generate_memory_topology(MemoryRegion
*mr
)
568 flatview_init(&view
);
570 render_memory_region(&view
, mr
, int128_zero(),
571 addrrange_make(int128_zero(), int128_2_64()), false);
572 flatview_simplify(&view
);
577 static void address_space_add_del_ioeventfds(AddressSpace
*as
,
578 MemoryRegionIoeventfd
*fds_new
,
580 MemoryRegionIoeventfd
*fds_old
,
584 MemoryRegionIoeventfd
*fd
;
585 MemoryRegionSection section
;
587 /* Generate a symmetric difference of the old and new fd sets, adding
588 * and deleting as necessary.
592 while (iold
< fds_old_nb
|| inew
< fds_new_nb
) {
593 if (iold
< fds_old_nb
594 && (inew
== fds_new_nb
595 || memory_region_ioeventfd_before(fds_old
[iold
],
598 section
= (MemoryRegionSection
) {
599 .address_space
= as
->root
,
600 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
601 .size
= int128_get64(fd
->addr
.size
),
603 MEMORY_LISTENER_CALL(eventfd_del
, Forward
, §ion
,
604 fd
->match_data
, fd
->data
, fd
->e
);
606 } else if (inew
< fds_new_nb
607 && (iold
== fds_old_nb
608 || memory_region_ioeventfd_before(fds_new
[inew
],
611 section
= (MemoryRegionSection
) {
612 .address_space
= as
->root
,
613 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
614 .size
= int128_get64(fd
->addr
.size
),
616 MEMORY_LISTENER_CALL(eventfd_add
, Reverse
, §ion
,
617 fd
->match_data
, fd
->data
, fd
->e
);
626 static void address_space_update_ioeventfds(AddressSpace
*as
)
629 unsigned ioeventfd_nb
= 0;
630 MemoryRegionIoeventfd
*ioeventfds
= NULL
;
634 FOR_EACH_FLAT_RANGE(fr
, as
->current_map
) {
635 for (i
= 0; i
< fr
->mr
->ioeventfd_nb
; ++i
) {
636 tmp
= addrrange_shift(fr
->mr
->ioeventfds
[i
].addr
,
637 int128_sub(fr
->addr
.start
,
638 int128_make64(fr
->offset_in_region
)));
639 if (addrrange_intersects(fr
->addr
, tmp
)) {
641 ioeventfds
= g_realloc(ioeventfds
,
642 ioeventfd_nb
* sizeof(*ioeventfds
));
643 ioeventfds
[ioeventfd_nb
-1] = fr
->mr
->ioeventfds
[i
];
644 ioeventfds
[ioeventfd_nb
-1].addr
= tmp
;
649 address_space_add_del_ioeventfds(as
, ioeventfds
, ioeventfd_nb
,
650 as
->ioeventfds
, as
->ioeventfd_nb
);
652 g_free(as
->ioeventfds
);
653 as
->ioeventfds
= ioeventfds
;
654 as
->ioeventfd_nb
= ioeventfd_nb
;
657 static void address_space_update_topology_pass(AddressSpace
*as
,
663 FlatRange
*frold
, *frnew
;
665 /* Generate a symmetric difference of the old and new memory maps.
666 * Kill ranges in the old map, and instantiate ranges in the new map.
669 while (iold
< old_view
.nr
|| inew
< new_view
.nr
) {
670 if (iold
< old_view
.nr
) {
671 frold
= &old_view
.ranges
[iold
];
675 if (inew
< new_view
.nr
) {
676 frnew
= &new_view
.ranges
[inew
];
683 || int128_lt(frold
->addr
.start
, frnew
->addr
.start
)
684 || (int128_eq(frold
->addr
.start
, frnew
->addr
.start
)
685 && !flatrange_equal(frold
, frnew
)))) {
686 /* In old, but (not in new, or in new but attributes changed). */
689 MEMORY_LISTENER_UPDATE_REGION(frold
, as
, Reverse
, region_del
);
693 } else if (frold
&& frnew
&& flatrange_equal(frold
, frnew
)) {
694 /* In both (logging may have changed) */
697 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_nop
);
698 if (frold
->dirty_log_mask
&& !frnew
->dirty_log_mask
) {
699 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Reverse
, log_stop
);
700 } else if (frnew
->dirty_log_mask
&& !frold
->dirty_log_mask
) {
701 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, log_start
);
711 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_add
);
720 static void address_space_update_topology(AddressSpace
*as
)
722 FlatView old_view
= *as
->current_map
;
723 FlatView new_view
= generate_memory_topology(as
->root
);
725 address_space_update_topology_pass(as
, old_view
, new_view
, false);
726 address_space_update_topology_pass(as
, old_view
, new_view
, true);
728 *as
->current_map
= new_view
;
729 flatview_destroy(&old_view
);
730 address_space_update_ioeventfds(as
);
733 void memory_region_transaction_begin(void)
735 qemu_flush_coalesced_mmio_buffer();
736 ++memory_region_transaction_depth
;
739 void memory_region_transaction_commit(void)
741 assert(memory_region_transaction_depth
);
742 --memory_region_transaction_depth
;
743 if (!memory_region_transaction_depth
) {
744 MEMORY_LISTENER_CALL_GLOBAL(begin
, Forward
);
746 if (address_space_memory
.root
) {
747 address_space_update_topology(&address_space_memory
);
749 if (address_space_io
.root
) {
750 address_space_update_topology(&address_space_io
);
753 MEMORY_LISTENER_CALL_GLOBAL(commit
, Forward
);
757 static void memory_region_destructor_none(MemoryRegion
*mr
)
761 static void memory_region_destructor_ram(MemoryRegion
*mr
)
763 qemu_ram_free(mr
->ram_addr
);
766 static void memory_region_destructor_ram_from_ptr(MemoryRegion
*mr
)
768 qemu_ram_free_from_ptr(mr
->ram_addr
);
771 static void memory_region_destructor_iomem(MemoryRegion
*mr
)
775 static void memory_region_destructor_rom_device(MemoryRegion
*mr
)
777 qemu_ram_free(mr
->ram_addr
& TARGET_PAGE_MASK
);
780 static bool memory_region_wrong_endianness(MemoryRegion
*mr
)
782 #ifdef TARGET_WORDS_BIGENDIAN
783 return mr
->ops
->endianness
== DEVICE_LITTLE_ENDIAN
;
785 return mr
->ops
->endianness
== DEVICE_BIG_ENDIAN
;
789 void memory_region_init(MemoryRegion
*mr
,
795 mr
->size
= int128_make64(size
);
796 if (size
== UINT64_MAX
) {
797 mr
->size
= int128_2_64();
802 mr
->terminates
= false;
805 mr
->readonly
= false;
806 mr
->rom_device
= false;
807 mr
->destructor
= memory_region_destructor_none
;
809 mr
->may_overlap
= false;
811 QTAILQ_INIT(&mr
->subregions
);
812 memset(&mr
->subregions_link
, 0, sizeof mr
->subregions_link
);
813 QTAILQ_INIT(&mr
->coalesced
);
814 mr
->name
= g_strdup(name
);
815 mr
->dirty_log_mask
= 0;
816 mr
->ioeventfd_nb
= 0;
817 mr
->ioeventfds
= NULL
;
818 mr
->flush_coalesced_mmio
= false;
821 static bool memory_region_access_valid(MemoryRegion
*mr
,
822 target_phys_addr_t addr
,
826 if (mr
->ops
->valid
.accepts
827 && !mr
->ops
->valid
.accepts(mr
->opaque
, addr
, size
, is_write
)) {
831 if (!mr
->ops
->valid
.unaligned
&& (addr
& (size
- 1))) {
835 /* Treat zero as compatibility all valid */
836 if (!mr
->ops
->valid
.max_access_size
) {
840 if (size
> mr
->ops
->valid
.max_access_size
841 || size
< mr
->ops
->valid
.min_access_size
) {
847 static uint64_t memory_region_dispatch_read1(MemoryRegion
*mr
,
848 target_phys_addr_t addr
,
853 if (!memory_region_access_valid(mr
, addr
, size
, false)) {
854 return -1U; /* FIXME: better signalling */
857 if (!mr
->ops
->read
) {
858 return mr
->ops
->old_mmio
.read
[bitops_ffsl(size
)](mr
->opaque
, addr
);
861 /* FIXME: support unaligned access */
862 access_with_adjusted_size(addr
, &data
, size
,
863 mr
->ops
->impl
.min_access_size
,
864 mr
->ops
->impl
.max_access_size
,
865 memory_region_read_accessor
, mr
);
870 static void adjust_endianness(MemoryRegion
*mr
, uint64_t *data
, unsigned size
)
872 if (memory_region_wrong_endianness(mr
)) {
877 *data
= bswap16(*data
);
880 *data
= bswap32(*data
);
888 static uint64_t memory_region_dispatch_read(MemoryRegion
*mr
,
889 target_phys_addr_t addr
,
894 ret
= memory_region_dispatch_read1(mr
, addr
, size
);
895 adjust_endianness(mr
, &ret
, size
);
899 static void memory_region_dispatch_write(MemoryRegion
*mr
,
900 target_phys_addr_t addr
,
904 if (!memory_region_access_valid(mr
, addr
, size
, true)) {
905 return; /* FIXME: better signalling */
908 adjust_endianness(mr
, &data
, size
);
910 if (!mr
->ops
->write
) {
911 mr
->ops
->old_mmio
.write
[bitops_ffsl(size
)](mr
->opaque
, addr
, data
);
915 /* FIXME: support unaligned access */
916 access_with_adjusted_size(addr
, &data
, size
,
917 mr
->ops
->impl
.min_access_size
,
918 mr
->ops
->impl
.max_access_size
,
919 memory_region_write_accessor
, mr
);
922 void memory_region_init_io(MemoryRegion
*mr
,
923 const MemoryRegionOps
*ops
,
928 memory_region_init(mr
, name
, size
);
931 mr
->terminates
= true;
932 mr
->destructor
= memory_region_destructor_iomem
;
933 mr
->ram_addr
= ~(ram_addr_t
)0;
936 void memory_region_init_ram(MemoryRegion
*mr
,
940 memory_region_init(mr
, name
, size
);
942 mr
->terminates
= true;
943 mr
->destructor
= memory_region_destructor_ram
;
944 mr
->ram_addr
= qemu_ram_alloc(size
, mr
);
947 void memory_region_init_ram_ptr(MemoryRegion
*mr
,
952 memory_region_init(mr
, name
, size
);
954 mr
->terminates
= true;
955 mr
->destructor
= memory_region_destructor_ram_from_ptr
;
956 mr
->ram_addr
= qemu_ram_alloc_from_ptr(size
, ptr
, mr
);
959 void memory_region_init_alias(MemoryRegion
*mr
,
962 target_phys_addr_t offset
,
965 memory_region_init(mr
, name
, size
);
967 mr
->alias_offset
= offset
;
970 void memory_region_init_rom_device(MemoryRegion
*mr
,
971 const MemoryRegionOps
*ops
,
976 memory_region_init(mr
, name
, size
);
979 mr
->terminates
= true;
980 mr
->rom_device
= true;
981 mr
->destructor
= memory_region_destructor_rom_device
;
982 mr
->ram_addr
= qemu_ram_alloc(size
, mr
);
985 static uint64_t invalid_read(void *opaque
, target_phys_addr_t addr
,
988 MemoryRegion
*mr
= opaque
;
990 if (!mr
->warning_printed
) {
991 fprintf(stderr
, "Invalid read from memory region %s\n", mr
->name
);
992 mr
->warning_printed
= true;
997 static void invalid_write(void *opaque
, target_phys_addr_t addr
, uint64_t data
,
1000 MemoryRegion
*mr
= opaque
;
1002 if (!mr
->warning_printed
) {
1003 fprintf(stderr
, "Invalid write to memory region %s\n", mr
->name
);
1004 mr
->warning_printed
= true;
1008 static const MemoryRegionOps reservation_ops
= {
1009 .read
= invalid_read
,
1010 .write
= invalid_write
,
1011 .endianness
= DEVICE_NATIVE_ENDIAN
,
1014 void memory_region_init_reservation(MemoryRegion
*mr
,
1018 memory_region_init_io(mr
, &reservation_ops
, mr
, name
, size
);
1021 void memory_region_destroy(MemoryRegion
*mr
)
1023 assert(QTAILQ_EMPTY(&mr
->subregions
));
1025 memory_region_clear_coalescing(mr
);
1026 g_free((char *)mr
->name
);
1027 g_free(mr
->ioeventfds
);
1030 uint64_t memory_region_size(MemoryRegion
*mr
)
1032 if (int128_eq(mr
->size
, int128_2_64())) {
1035 return int128_get64(mr
->size
);
1038 const char *memory_region_name(MemoryRegion
*mr
)
1043 bool memory_region_is_ram(MemoryRegion
*mr
)
1048 bool memory_region_is_logging(MemoryRegion
*mr
)
1050 return mr
->dirty_log_mask
;
1053 bool memory_region_is_rom(MemoryRegion
*mr
)
1055 return mr
->ram
&& mr
->readonly
;
1058 void memory_region_set_log(MemoryRegion
*mr
, bool log
, unsigned client
)
1060 uint8_t mask
= 1 << client
;
1062 memory_region_transaction_begin();
1063 mr
->dirty_log_mask
= (mr
->dirty_log_mask
& ~mask
) | (log
* mask
);
1064 memory_region_transaction_commit();
1067 bool memory_region_get_dirty(MemoryRegion
*mr
, target_phys_addr_t addr
,
1068 target_phys_addr_t size
, unsigned client
)
1070 assert(mr
->terminates
);
1071 return cpu_physical_memory_get_dirty(mr
->ram_addr
+ addr
, size
,
1075 void memory_region_set_dirty(MemoryRegion
*mr
, target_phys_addr_t addr
,
1076 target_phys_addr_t size
)
1078 assert(mr
->terminates
);
1079 return cpu_physical_memory_set_dirty_range(mr
->ram_addr
+ addr
, size
, -1);
1082 void memory_region_sync_dirty_bitmap(MemoryRegion
*mr
)
1086 FOR_EACH_FLAT_RANGE(fr
, address_space_memory
.current_map
) {
1088 MEMORY_LISTENER_UPDATE_REGION(fr
, &address_space_memory
,
1094 void memory_region_set_readonly(MemoryRegion
*mr
, bool readonly
)
1096 if (mr
->readonly
!= readonly
) {
1097 memory_region_transaction_begin();
1098 mr
->readonly
= readonly
;
1099 memory_region_transaction_commit();
1103 void memory_region_rom_device_set_readable(MemoryRegion
*mr
, bool readable
)
1105 if (mr
->readable
!= readable
) {
1106 memory_region_transaction_begin();
1107 mr
->readable
= readable
;
1108 memory_region_transaction_commit();
1112 void memory_region_reset_dirty(MemoryRegion
*mr
, target_phys_addr_t addr
,
1113 target_phys_addr_t size
, unsigned client
)
1115 assert(mr
->terminates
);
1116 cpu_physical_memory_reset_dirty(mr
->ram_addr
+ addr
,
1117 mr
->ram_addr
+ addr
+ size
,
1121 void *memory_region_get_ram_ptr(MemoryRegion
*mr
)
1124 return memory_region_get_ram_ptr(mr
->alias
) + mr
->alias_offset
;
1127 assert(mr
->terminates
);
1129 return qemu_get_ram_ptr(mr
->ram_addr
& TARGET_PAGE_MASK
);
1132 static void memory_region_update_coalesced_range(MemoryRegion
*mr
)
1135 CoalescedMemoryRange
*cmr
;
1138 FOR_EACH_FLAT_RANGE(fr
, address_space_memory
.current_map
) {
1140 qemu_unregister_coalesced_mmio(int128_get64(fr
->addr
.start
),
1141 int128_get64(fr
->addr
.size
));
1142 QTAILQ_FOREACH(cmr
, &mr
->coalesced
, link
) {
1143 tmp
= addrrange_shift(cmr
->addr
,
1144 int128_sub(fr
->addr
.start
,
1145 int128_make64(fr
->offset_in_region
)));
1146 if (!addrrange_intersects(tmp
, fr
->addr
)) {
1149 tmp
= addrrange_intersection(tmp
, fr
->addr
);
1150 qemu_register_coalesced_mmio(int128_get64(tmp
.start
),
1151 int128_get64(tmp
.size
));
1157 void memory_region_set_coalescing(MemoryRegion
*mr
)
1159 memory_region_clear_coalescing(mr
);
1160 memory_region_add_coalescing(mr
, 0, int128_get64(mr
->size
));
1163 void memory_region_add_coalescing(MemoryRegion
*mr
,
1164 target_phys_addr_t offset
,
1167 CoalescedMemoryRange
*cmr
= g_malloc(sizeof(*cmr
));
1169 cmr
->addr
= addrrange_make(int128_make64(offset
), int128_make64(size
));
1170 QTAILQ_INSERT_TAIL(&mr
->coalesced
, cmr
, link
);
1171 memory_region_update_coalesced_range(mr
);
1172 memory_region_set_flush_coalesced(mr
);
1175 void memory_region_clear_coalescing(MemoryRegion
*mr
)
1177 CoalescedMemoryRange
*cmr
;
1179 qemu_flush_coalesced_mmio_buffer();
1180 mr
->flush_coalesced_mmio
= false;
1182 while (!QTAILQ_EMPTY(&mr
->coalesced
)) {
1183 cmr
= QTAILQ_FIRST(&mr
->coalesced
);
1184 QTAILQ_REMOVE(&mr
->coalesced
, cmr
, link
);
1187 memory_region_update_coalesced_range(mr
);
1190 void memory_region_set_flush_coalesced(MemoryRegion
*mr
)
1192 mr
->flush_coalesced_mmio
= true;
1195 void memory_region_clear_flush_coalesced(MemoryRegion
*mr
)
1197 qemu_flush_coalesced_mmio_buffer();
1198 if (QTAILQ_EMPTY(&mr
->coalesced
)) {
1199 mr
->flush_coalesced_mmio
= false;
1203 void memory_region_add_eventfd(MemoryRegion
*mr
,
1204 target_phys_addr_t addr
,
1210 MemoryRegionIoeventfd mrfd
= {
1211 .addr
.start
= int128_make64(addr
),
1212 .addr
.size
= int128_make64(size
),
1213 .match_data
= match_data
,
1219 memory_region_transaction_begin();
1220 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
1221 if (memory_region_ioeventfd_before(mrfd
, mr
->ioeventfds
[i
])) {
1226 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
1227 sizeof(*mr
->ioeventfds
) * mr
->ioeventfd_nb
);
1228 memmove(&mr
->ioeventfds
[i
+1], &mr
->ioeventfds
[i
],
1229 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
-1 - i
));
1230 mr
->ioeventfds
[i
] = mrfd
;
1231 memory_region_transaction_commit();
1234 void memory_region_del_eventfd(MemoryRegion
*mr
,
1235 target_phys_addr_t addr
,
1241 MemoryRegionIoeventfd mrfd
= {
1242 .addr
.start
= int128_make64(addr
),
1243 .addr
.size
= int128_make64(size
),
1244 .match_data
= match_data
,
1250 memory_region_transaction_begin();
1251 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
1252 if (memory_region_ioeventfd_equal(mrfd
, mr
->ioeventfds
[i
])) {
1256 assert(i
!= mr
->ioeventfd_nb
);
1257 memmove(&mr
->ioeventfds
[i
], &mr
->ioeventfds
[i
+1],
1258 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
- (i
+1)));
1260 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
1261 sizeof(*mr
->ioeventfds
)*mr
->ioeventfd_nb
+ 1);
1262 memory_region_transaction_commit();
1265 static void memory_region_add_subregion_common(MemoryRegion
*mr
,
1266 target_phys_addr_t offset
,
1267 MemoryRegion
*subregion
)
1269 MemoryRegion
*other
;
1271 memory_region_transaction_begin();
1273 assert(!subregion
->parent
);
1274 subregion
->parent
= mr
;
1275 subregion
->addr
= offset
;
1276 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
1277 if (subregion
->may_overlap
|| other
->may_overlap
) {
1280 if (int128_gt(int128_make64(offset
),
1281 int128_add(int128_make64(other
->addr
), other
->size
))
1282 || int128_le(int128_add(int128_make64(offset
), subregion
->size
),
1283 int128_make64(other
->addr
))) {
1287 printf("warning: subregion collision %llx/%llx (%s) "
1288 "vs %llx/%llx (%s)\n",
1289 (unsigned long long)offset
,
1290 (unsigned long long)int128_get64(subregion
->size
),
1292 (unsigned long long)other
->addr
,
1293 (unsigned long long)int128_get64(other
->size
),
1297 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
1298 if (subregion
->priority
>= other
->priority
) {
1299 QTAILQ_INSERT_BEFORE(other
, subregion
, subregions_link
);
1303 QTAILQ_INSERT_TAIL(&mr
->subregions
, subregion
, subregions_link
);
1305 memory_region_transaction_commit();
1309 void memory_region_add_subregion(MemoryRegion
*mr
,
1310 target_phys_addr_t offset
,
1311 MemoryRegion
*subregion
)
1313 subregion
->may_overlap
= false;
1314 subregion
->priority
= 0;
1315 memory_region_add_subregion_common(mr
, offset
, subregion
);
1318 void memory_region_add_subregion_overlap(MemoryRegion
*mr
,
1319 target_phys_addr_t offset
,
1320 MemoryRegion
*subregion
,
1323 subregion
->may_overlap
= true;
1324 subregion
->priority
= priority
;
1325 memory_region_add_subregion_common(mr
, offset
, subregion
);
1328 void memory_region_del_subregion(MemoryRegion
*mr
,
1329 MemoryRegion
*subregion
)
1331 memory_region_transaction_begin();
1332 assert(subregion
->parent
== mr
);
1333 subregion
->parent
= NULL
;
1334 QTAILQ_REMOVE(&mr
->subregions
, subregion
, subregions_link
);
1335 memory_region_transaction_commit();
1338 void memory_region_set_enabled(MemoryRegion
*mr
, bool enabled
)
1340 if (enabled
== mr
->enabled
) {
1343 memory_region_transaction_begin();
1344 mr
->enabled
= enabled
;
1345 memory_region_transaction_commit();
1348 void memory_region_set_address(MemoryRegion
*mr
, target_phys_addr_t addr
)
1350 MemoryRegion
*parent
= mr
->parent
;
1351 unsigned priority
= mr
->priority
;
1352 bool may_overlap
= mr
->may_overlap
;
1354 if (addr
== mr
->addr
|| !parent
) {
1359 memory_region_transaction_begin();
1360 memory_region_del_subregion(parent
, mr
);
1362 memory_region_add_subregion_overlap(parent
, addr
, mr
, priority
);
1364 memory_region_add_subregion(parent
, addr
, mr
);
1366 memory_region_transaction_commit();
1369 void memory_region_set_alias_offset(MemoryRegion
*mr
, target_phys_addr_t offset
)
1373 if (offset
== mr
->alias_offset
) {
1377 memory_region_transaction_begin();
1378 mr
->alias_offset
= offset
;
1379 memory_region_transaction_commit();
1382 ram_addr_t
memory_region_get_ram_addr(MemoryRegion
*mr
)
1384 return mr
->ram_addr
;
1387 static int cmp_flatrange_addr(const void *addr_
, const void *fr_
)
1389 const AddrRange
*addr
= addr_
;
1390 const FlatRange
*fr
= fr_
;
1392 if (int128_le(addrrange_end(*addr
), fr
->addr
.start
)) {
1394 } else if (int128_ge(addr
->start
, addrrange_end(fr
->addr
))) {
1400 static FlatRange
*address_space_lookup(AddressSpace
*as
, AddrRange addr
)
1402 return bsearch(&addr
, as
->current_map
->ranges
, as
->current_map
->nr
,
1403 sizeof(FlatRange
), cmp_flatrange_addr
);
1406 MemoryRegionSection
memory_region_find(MemoryRegion
*address_space
,
1407 target_phys_addr_t addr
, uint64_t size
)
1409 AddressSpace
*as
= memory_region_to_address_space(address_space
);
1410 AddrRange range
= addrrange_make(int128_make64(addr
),
1411 int128_make64(size
));
1412 FlatRange
*fr
= address_space_lookup(as
, range
);
1413 MemoryRegionSection ret
= { .mr
= NULL
, .size
= 0 };
1419 while (fr
> as
->current_map
->ranges
1420 && addrrange_intersects(fr
[-1].addr
, range
)) {
1425 range
= addrrange_intersection(range
, fr
->addr
);
1426 ret
.offset_within_region
= fr
->offset_in_region
;
1427 ret
.offset_within_region
+= int128_get64(int128_sub(range
.start
,
1429 ret
.size
= int128_get64(range
.size
);
1430 ret
.offset_within_address_space
= int128_get64(range
.start
);
1431 ret
.readonly
= fr
->readonly
;
1435 void memory_global_sync_dirty_bitmap(MemoryRegion
*address_space
)
1437 AddressSpace
*as
= memory_region_to_address_space(address_space
);
1440 FOR_EACH_FLAT_RANGE(fr
, as
->current_map
) {
1441 MEMORY_LISTENER_UPDATE_REGION(fr
, as
, Forward
, log_sync
);
1445 void memory_global_dirty_log_start(void)
1447 global_dirty_log
= true;
1448 MEMORY_LISTENER_CALL_GLOBAL(log_global_start
, Forward
);
1451 void memory_global_dirty_log_stop(void)
1453 global_dirty_log
= false;
1454 MEMORY_LISTENER_CALL_GLOBAL(log_global_stop
, Reverse
);
1457 static void listener_add_address_space(MemoryListener
*listener
,
1466 if (listener
->address_space_filter
1467 && listener
->address_space_filter
!= as
->root
) {
1471 if (global_dirty_log
) {
1472 listener
->log_global_start(listener
);
1474 FOR_EACH_FLAT_RANGE(fr
, as
->current_map
) {
1475 MemoryRegionSection section
= {
1477 .address_space
= as
->root
,
1478 .offset_within_region
= fr
->offset_in_region
,
1479 .size
= int128_get64(fr
->addr
.size
),
1480 .offset_within_address_space
= int128_get64(fr
->addr
.start
),
1481 .readonly
= fr
->readonly
,
1483 listener
->region_add(listener
, §ion
);
1487 void memory_listener_register(MemoryListener
*listener
, MemoryRegion
*filter
)
1489 MemoryListener
*other
= NULL
;
1491 listener
->address_space_filter
= filter
;
1492 if (QTAILQ_EMPTY(&memory_listeners
)
1493 || listener
->priority
>= QTAILQ_LAST(&memory_listeners
,
1494 memory_listeners
)->priority
) {
1495 QTAILQ_INSERT_TAIL(&memory_listeners
, listener
, link
);
1497 QTAILQ_FOREACH(other
, &memory_listeners
, link
) {
1498 if (listener
->priority
< other
->priority
) {
1502 QTAILQ_INSERT_BEFORE(other
, listener
, link
);
1504 listener_add_address_space(listener
, &address_space_memory
);
1505 listener_add_address_space(listener
, &address_space_io
);
1508 void memory_listener_unregister(MemoryListener
*listener
)
1510 QTAILQ_REMOVE(&memory_listeners
, listener
, link
);
1513 static void address_space_init(AddressSpace
*as
, MemoryRegion
*root
)
1515 memory_region_transaction_begin();
1517 as
->current_map
= g_new(FlatView
, 1);
1518 flatview_init(as
->current_map
);
1519 memory_region_transaction_commit();
1522 void set_system_memory_map(MemoryRegion
*mr
)
1524 address_space_init(&address_space_memory
, mr
);
1527 void set_system_io_map(MemoryRegion
*mr
)
1529 address_space_init(&address_space_io
, mr
);
1532 uint64_t io_mem_read(MemoryRegion
*mr
, target_phys_addr_t addr
, unsigned size
)
1534 return memory_region_dispatch_read(mr
, addr
, size
);
1537 void io_mem_write(MemoryRegion
*mr
, target_phys_addr_t addr
,
1538 uint64_t val
, unsigned size
)
1540 memory_region_dispatch_write(mr
, addr
, val
, size
);
1543 typedef struct MemoryRegionList MemoryRegionList
;
1545 struct MemoryRegionList
{
1546 const MemoryRegion
*mr
;
1548 QTAILQ_ENTRY(MemoryRegionList
) queue
;
1551 typedef QTAILQ_HEAD(queue
, MemoryRegionList
) MemoryRegionListHead
;
1553 static void mtree_print_mr(fprintf_function mon_printf
, void *f
,
1554 const MemoryRegion
*mr
, unsigned int level
,
1555 target_phys_addr_t base
,
1556 MemoryRegionListHead
*alias_print_queue
)
1558 MemoryRegionList
*new_ml
, *ml
, *next_ml
;
1559 MemoryRegionListHead submr_print_queue
;
1560 const MemoryRegion
*submr
;
1567 for (i
= 0; i
< level
; i
++) {
1572 MemoryRegionList
*ml
;
1575 /* check if the alias is already in the queue */
1576 QTAILQ_FOREACH(ml
, alias_print_queue
, queue
) {
1577 if (ml
->mr
== mr
->alias
&& !ml
->printed
) {
1583 ml
= g_new(MemoryRegionList
, 1);
1585 ml
->printed
= false;
1586 QTAILQ_INSERT_TAIL(alias_print_queue
, ml
, queue
);
1588 mon_printf(f
, TARGET_FMT_plx
"-" TARGET_FMT_plx
1589 " (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx
1590 "-" TARGET_FMT_plx
"\n",
1593 + (target_phys_addr_t
)int128_get64(mr
->size
) - 1,
1595 mr
->readable
? 'R' : '-',
1596 !mr
->readonly
&& !(mr
->rom_device
&& mr
->readable
) ? 'W'
1602 + (target_phys_addr_t
)int128_get64(mr
->size
) - 1);
1605 TARGET_FMT_plx
"-" TARGET_FMT_plx
" (prio %d, %c%c): %s\n",
1608 + (target_phys_addr_t
)int128_get64(mr
->size
) - 1,
1610 mr
->readable
? 'R' : '-',
1611 !mr
->readonly
&& !(mr
->rom_device
&& mr
->readable
) ? 'W'
1616 QTAILQ_INIT(&submr_print_queue
);
1618 QTAILQ_FOREACH(submr
, &mr
->subregions
, subregions_link
) {
1619 new_ml
= g_new(MemoryRegionList
, 1);
1621 QTAILQ_FOREACH(ml
, &submr_print_queue
, queue
) {
1622 if (new_ml
->mr
->addr
< ml
->mr
->addr
||
1623 (new_ml
->mr
->addr
== ml
->mr
->addr
&&
1624 new_ml
->mr
->priority
> ml
->mr
->priority
)) {
1625 QTAILQ_INSERT_BEFORE(ml
, new_ml
, queue
);
1631 QTAILQ_INSERT_TAIL(&submr_print_queue
, new_ml
, queue
);
1635 QTAILQ_FOREACH(ml
, &submr_print_queue
, queue
) {
1636 mtree_print_mr(mon_printf
, f
, ml
->mr
, level
+ 1, base
+ mr
->addr
,
1640 QTAILQ_FOREACH_SAFE(ml
, &submr_print_queue
, queue
, next_ml
) {
1645 void mtree_info(fprintf_function mon_printf
, void *f
)
1647 MemoryRegionListHead ml_head
;
1648 MemoryRegionList
*ml
, *ml2
;
1650 QTAILQ_INIT(&ml_head
);
1652 mon_printf(f
, "memory\n");
1653 mtree_print_mr(mon_printf
, f
, address_space_memory
.root
, 0, 0, &ml_head
);
1655 if (address_space_io
.root
&&
1656 !QTAILQ_EMPTY(&address_space_io
.root
->subregions
)) {
1657 mon_printf(f
, "I/O\n");
1658 mtree_print_mr(mon_printf
, f
, address_space_io
.root
, 0, 0, &ml_head
);
1661 mon_printf(f
, "aliases\n");
1662 /* print aliased regions */
1663 QTAILQ_FOREACH(ml
, &ml_head
, queue
) {
1665 mon_printf(f
, "%s\n", ml
->mr
->name
);
1666 mtree_print_mr(mon_printf
, f
, ml
->mr
, 0, 0, &ml_head
);
1670 QTAILQ_FOREACH_SAFE(ml
, &ml_head
, queue
, ml2
) {