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 #define WANT_EXEC_OBSOLETE
24 #include "exec-obsolete.h"
26 unsigned memory_region_transaction_depth
= 0;
27 static bool memory_region_update_pending
= false;
28 static bool global_dirty_log
= false;
30 static QTAILQ_HEAD(memory_listeners
, MemoryListener
) memory_listeners
31 = QTAILQ_HEAD_INITIALIZER(memory_listeners
);
33 typedef struct AddrRange AddrRange
;
36 * Note using signed integers limits us to physical addresses at most
37 * 63 bits wide. They are needed for negative offsetting in aliases
38 * (large MemoryRegion::alias_offset).
45 static AddrRange
addrrange_make(Int128 start
, Int128 size
)
47 return (AddrRange
) { start
, size
};
50 static bool addrrange_equal(AddrRange r1
, AddrRange r2
)
52 return int128_eq(r1
.start
, r2
.start
) && int128_eq(r1
.size
, r2
.size
);
55 static Int128
addrrange_end(AddrRange r
)
57 return int128_add(r
.start
, r
.size
);
60 static AddrRange
addrrange_shift(AddrRange range
, Int128 delta
)
62 int128_addto(&range
.start
, delta
);
66 static bool addrrange_contains(AddrRange range
, Int128 addr
)
68 return int128_ge(addr
, range
.start
)
69 && int128_lt(addr
, addrrange_end(range
));
72 static bool addrrange_intersects(AddrRange r1
, AddrRange r2
)
74 return addrrange_contains(r1
, r2
.start
)
75 || addrrange_contains(r2
, r1
.start
);
78 static AddrRange
addrrange_intersection(AddrRange r1
, AddrRange r2
)
80 Int128 start
= int128_max(r1
.start
, r2
.start
);
81 Int128 end
= int128_min(addrrange_end(r1
), addrrange_end(r2
));
82 return addrrange_make(start
, int128_sub(end
, start
));
85 enum ListenerDirection
{ Forward
, Reverse
};
87 static bool memory_listener_match(MemoryListener
*listener
,
88 MemoryRegionSection
*section
)
90 return !listener
->address_space_filter
91 || listener
->address_space_filter
== section
->address_space
;
94 #define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
96 MemoryListener *_listener; \
98 switch (_direction) { \
100 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
101 _listener->_callback(_listener, ##_args); \
105 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
106 memory_listeners, link) { \
107 _listener->_callback(_listener, ##_args); \
115 #define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \
117 MemoryListener *_listener; \
119 switch (_direction) { \
121 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
122 if (memory_listener_match(_listener, _section)) { \
123 _listener->_callback(_listener, _section, ##_args); \
128 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
129 memory_listeners, link) { \
130 if (memory_listener_match(_listener, _section)) { \
131 _listener->_callback(_listener, _section, ##_args); \
140 #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \
141 MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \
143 .address_space = (as)->root, \
144 .offset_within_region = (fr)->offset_in_region, \
145 .size = int128_get64((fr)->addr.size), \
146 .offset_within_address_space = int128_get64((fr)->addr.start), \
147 .readonly = (fr)->readonly, \
150 struct CoalescedMemoryRange
{
152 QTAILQ_ENTRY(CoalescedMemoryRange
) link
;
155 struct MemoryRegionIoeventfd
{
162 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a
,
163 MemoryRegionIoeventfd b
)
165 if (int128_lt(a
.addr
.start
, b
.addr
.start
)) {
167 } else if (int128_gt(a
.addr
.start
, b
.addr
.start
)) {
169 } else if (int128_lt(a
.addr
.size
, b
.addr
.size
)) {
171 } else if (int128_gt(a
.addr
.size
, b
.addr
.size
)) {
173 } else if (a
.match_data
< b
.match_data
) {
175 } else if (a
.match_data
> b
.match_data
) {
177 } else if (a
.match_data
) {
178 if (a
.data
< b
.data
) {
180 } else if (a
.data
> b
.data
) {
186 } else if (a
.fd
> b
.fd
) {
192 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a
,
193 MemoryRegionIoeventfd b
)
195 return !memory_region_ioeventfd_before(a
, b
)
196 && !memory_region_ioeventfd_before(b
, a
);
199 typedef struct FlatRange FlatRange
;
200 typedef struct FlatView FlatView
;
202 /* Range of memory in the global map. Addresses are absolute. */
205 target_phys_addr_t offset_in_region
;
207 uint8_t dirty_log_mask
;
212 /* Flattened global view of current active memory hierarchy. Kept in sorted
218 unsigned nr_allocated
;
221 typedef struct AddressSpace AddressSpace
;
222 typedef struct AddressSpaceOps AddressSpaceOps
;
224 /* A system address space - I/O, memory, etc. */
225 struct AddressSpace
{
227 FlatView current_map
;
229 MemoryRegionIoeventfd
*ioeventfds
;
232 #define FOR_EACH_FLAT_RANGE(var, view) \
233 for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
235 static bool flatrange_equal(FlatRange
*a
, FlatRange
*b
)
237 return a
->mr
== b
->mr
238 && addrrange_equal(a
->addr
, b
->addr
)
239 && a
->offset_in_region
== b
->offset_in_region
240 && a
->readable
== b
->readable
241 && a
->readonly
== b
->readonly
;
244 static void flatview_init(FlatView
*view
)
248 view
->nr_allocated
= 0;
251 /* Insert a range into a given position. Caller is responsible for maintaining
254 static void flatview_insert(FlatView
*view
, unsigned pos
, FlatRange
*range
)
256 if (view
->nr
== view
->nr_allocated
) {
257 view
->nr_allocated
= MAX(2 * view
->nr
, 10);
258 view
->ranges
= g_realloc(view
->ranges
,
259 view
->nr_allocated
* sizeof(*view
->ranges
));
261 memmove(view
->ranges
+ pos
+ 1, view
->ranges
+ pos
,
262 (view
->nr
- pos
) * sizeof(FlatRange
));
263 view
->ranges
[pos
] = *range
;
267 static void flatview_destroy(FlatView
*view
)
269 g_free(view
->ranges
);
272 static bool can_merge(FlatRange
*r1
, FlatRange
*r2
)
274 return int128_eq(addrrange_end(r1
->addr
), r2
->addr
.start
)
276 && int128_eq(int128_add(int128_make64(r1
->offset_in_region
),
278 int128_make64(r2
->offset_in_region
))
279 && r1
->dirty_log_mask
== r2
->dirty_log_mask
280 && r1
->readable
== r2
->readable
281 && r1
->readonly
== r2
->readonly
;
284 /* Attempt to simplify a view by merging ajacent ranges */
285 static void flatview_simplify(FlatView
*view
)
290 while (i
< view
->nr
) {
293 && can_merge(&view
->ranges
[j
-1], &view
->ranges
[j
])) {
294 int128_addto(&view
->ranges
[i
].addr
.size
, view
->ranges
[j
].addr
.size
);
298 memmove(&view
->ranges
[i
], &view
->ranges
[j
],
299 (view
->nr
- j
) * sizeof(view
->ranges
[j
]));
304 static void memory_region_read_accessor(void *opaque
,
305 target_phys_addr_t addr
,
311 MemoryRegion
*mr
= opaque
;
314 tmp
= mr
->ops
->read(mr
->opaque
, addr
, size
);
315 *value
|= (tmp
& mask
) << shift
;
318 static void memory_region_write_accessor(void *opaque
,
319 target_phys_addr_t addr
,
325 MemoryRegion
*mr
= opaque
;
328 tmp
= (*value
>> shift
) & mask
;
329 mr
->ops
->write(mr
->opaque
, addr
, tmp
, size
);
332 static void access_with_adjusted_size(target_phys_addr_t addr
,
335 unsigned access_size_min
,
336 unsigned access_size_max
,
337 void (*access
)(void *opaque
,
338 target_phys_addr_t addr
,
345 uint64_t access_mask
;
346 unsigned access_size
;
349 if (!access_size_min
) {
352 if (!access_size_max
) {
355 access_size
= MAX(MIN(size
, access_size_max
), access_size_min
);
356 access_mask
= -1ULL >> (64 - access_size
* 8);
357 for (i
= 0; i
< size
; i
+= access_size
) {
358 /* FIXME: big-endian support */
359 access(opaque
, addr
+ i
, value
, access_size
, i
* 8, access_mask
);
363 static AddressSpace address_space_memory
;
365 static const MemoryRegionPortio
*find_portio(MemoryRegion
*mr
, uint64_t offset
,
366 unsigned width
, bool write
)
368 const MemoryRegionPortio
*mrp
;
370 for (mrp
= mr
->ops
->old_portio
; mrp
->size
; ++mrp
) {
371 if (offset
>= mrp
->offset
&& offset
< mrp
->offset
+ mrp
->len
372 && width
== mrp
->size
373 && (write
? (bool)mrp
->write
: (bool)mrp
->read
)) {
380 static void memory_region_iorange_read(IORange
*iorange
,
385 MemoryRegion
*mr
= container_of(iorange
, MemoryRegion
, iorange
);
387 if (mr
->ops
->old_portio
) {
388 const MemoryRegionPortio
*mrp
= find_portio(mr
, offset
, width
, false);
390 *data
= ((uint64_t)1 << (width
* 8)) - 1;
392 *data
= mrp
->read(mr
->opaque
, offset
);
393 } else if (width
== 2) {
394 mrp
= find_portio(mr
, offset
, 1, false);
396 *data
= mrp
->read(mr
->opaque
, offset
) |
397 (mrp
->read(mr
->opaque
, offset
+ 1) << 8);
402 access_with_adjusted_size(offset
, data
, width
,
403 mr
->ops
->impl
.min_access_size
,
404 mr
->ops
->impl
.max_access_size
,
405 memory_region_read_accessor
, mr
);
408 static void memory_region_iorange_write(IORange
*iorange
,
413 MemoryRegion
*mr
= container_of(iorange
, MemoryRegion
, iorange
);
415 if (mr
->ops
->old_portio
) {
416 const MemoryRegionPortio
*mrp
= find_portio(mr
, offset
, width
, true);
419 mrp
->write(mr
->opaque
, offset
, data
);
420 } else if (width
== 2) {
421 mrp
= find_portio(mr
, offset
, 1, false);
423 mrp
->write(mr
->opaque
, offset
, data
& 0xff);
424 mrp
->write(mr
->opaque
, offset
+ 1, data
>> 8);
428 access_with_adjusted_size(offset
, &data
, width
,
429 mr
->ops
->impl
.min_access_size
,
430 mr
->ops
->impl
.max_access_size
,
431 memory_region_write_accessor
, mr
);
434 const IORangeOps memory_region_iorange_ops
= {
435 .read
= memory_region_iorange_read
,
436 .write
= memory_region_iorange_write
,
439 static AddressSpace address_space_io
;
441 static AddressSpace
*memory_region_to_address_space(MemoryRegion
*mr
)
446 if (mr
== address_space_memory
.root
) {
447 return &address_space_memory
;
449 if (mr
== address_space_io
.root
) {
450 return &address_space_io
;
455 /* Render a memory region into the global view. Ranges in @view obscure
458 static void render_memory_region(FlatView
*view
,
464 MemoryRegion
*subregion
;
466 target_phys_addr_t offset_in_region
;
476 int128_addto(&base
, int128_make64(mr
->addr
));
477 readonly
|= mr
->readonly
;
479 tmp
= addrrange_make(base
, mr
->size
);
481 if (!addrrange_intersects(tmp
, clip
)) {
485 clip
= addrrange_intersection(tmp
, clip
);
488 int128_subfrom(&base
, int128_make64(mr
->alias
->addr
));
489 int128_subfrom(&base
, int128_make64(mr
->alias_offset
));
490 render_memory_region(view
, mr
->alias
, base
, clip
, readonly
);
494 /* Render subregions in priority order. */
495 QTAILQ_FOREACH(subregion
, &mr
->subregions
, subregions_link
) {
496 render_memory_region(view
, subregion
, base
, clip
, readonly
);
499 if (!mr
->terminates
) {
503 offset_in_region
= int128_get64(int128_sub(clip
.start
, base
));
507 /* Render the region itself into any gaps left by the current view. */
508 for (i
= 0; i
< view
->nr
&& int128_nz(remain
); ++i
) {
509 if (int128_ge(base
, addrrange_end(view
->ranges
[i
].addr
))) {
512 if (int128_lt(base
, view
->ranges
[i
].addr
.start
)) {
513 now
= int128_min(remain
,
514 int128_sub(view
->ranges
[i
].addr
.start
, base
));
516 fr
.offset_in_region
= offset_in_region
;
517 fr
.addr
= addrrange_make(base
, now
);
518 fr
.dirty_log_mask
= mr
->dirty_log_mask
;
519 fr
.readable
= mr
->readable
;
520 fr
.readonly
= readonly
;
521 flatview_insert(view
, i
, &fr
);
523 int128_addto(&base
, now
);
524 offset_in_region
+= int128_get64(now
);
525 int128_subfrom(&remain
, now
);
527 if (int128_eq(base
, view
->ranges
[i
].addr
.start
)) {
528 now
= int128_min(remain
, view
->ranges
[i
].addr
.size
);
529 int128_addto(&base
, now
);
530 offset_in_region
+= int128_get64(now
);
531 int128_subfrom(&remain
, now
);
534 if (int128_nz(remain
)) {
536 fr
.offset_in_region
= offset_in_region
;
537 fr
.addr
= addrrange_make(base
, remain
);
538 fr
.dirty_log_mask
= mr
->dirty_log_mask
;
539 fr
.readable
= mr
->readable
;
540 fr
.readonly
= readonly
;
541 flatview_insert(view
, i
, &fr
);
545 /* Render a memory topology into a list of disjoint absolute ranges. */
546 static FlatView
generate_memory_topology(MemoryRegion
*mr
)
550 flatview_init(&view
);
552 render_memory_region(&view
, mr
, int128_zero(),
553 addrrange_make(int128_zero(), int128_2_64()), false);
554 flatview_simplify(&view
);
559 static void address_space_add_del_ioeventfds(AddressSpace
*as
,
560 MemoryRegionIoeventfd
*fds_new
,
562 MemoryRegionIoeventfd
*fds_old
,
566 MemoryRegionIoeventfd
*fd
;
567 MemoryRegionSection section
;
569 /* Generate a symmetric difference of the old and new fd sets, adding
570 * and deleting as necessary.
574 while (iold
< fds_old_nb
|| inew
< fds_new_nb
) {
575 if (iold
< fds_old_nb
576 && (inew
== fds_new_nb
577 || memory_region_ioeventfd_before(fds_old
[iold
],
580 section
= (MemoryRegionSection
) {
581 .address_space
= as
->root
,
582 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
583 .size
= int128_get64(fd
->addr
.size
),
585 MEMORY_LISTENER_CALL(eventfd_del
, Forward
, §ion
,
586 fd
->match_data
, fd
->data
, fd
->fd
);
588 } else if (inew
< fds_new_nb
589 && (iold
== fds_old_nb
590 || memory_region_ioeventfd_before(fds_new
[inew
],
593 section
= (MemoryRegionSection
) {
594 .address_space
= as
->root
,
595 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
596 .size
= int128_get64(fd
->addr
.size
),
598 MEMORY_LISTENER_CALL(eventfd_add
, Reverse
, §ion
,
599 fd
->match_data
, fd
->data
, fd
->fd
);
608 static void address_space_update_ioeventfds(AddressSpace
*as
)
611 unsigned ioeventfd_nb
= 0;
612 MemoryRegionIoeventfd
*ioeventfds
= NULL
;
616 FOR_EACH_FLAT_RANGE(fr
, &as
->current_map
) {
617 for (i
= 0; i
< fr
->mr
->ioeventfd_nb
; ++i
) {
618 tmp
= addrrange_shift(fr
->mr
->ioeventfds
[i
].addr
,
619 int128_sub(fr
->addr
.start
,
620 int128_make64(fr
->offset_in_region
)));
621 if (addrrange_intersects(fr
->addr
, tmp
)) {
623 ioeventfds
= g_realloc(ioeventfds
,
624 ioeventfd_nb
* sizeof(*ioeventfds
));
625 ioeventfds
[ioeventfd_nb
-1] = fr
->mr
->ioeventfds
[i
];
626 ioeventfds
[ioeventfd_nb
-1].addr
= tmp
;
631 address_space_add_del_ioeventfds(as
, ioeventfds
, ioeventfd_nb
,
632 as
->ioeventfds
, as
->ioeventfd_nb
);
634 g_free(as
->ioeventfds
);
635 as
->ioeventfds
= ioeventfds
;
636 as
->ioeventfd_nb
= ioeventfd_nb
;
639 static void address_space_update_topology_pass(AddressSpace
*as
,
645 FlatRange
*frold
, *frnew
;
647 /* Generate a symmetric difference of the old and new memory maps.
648 * Kill ranges in the old map, and instantiate ranges in the new map.
651 while (iold
< old_view
.nr
|| inew
< new_view
.nr
) {
652 if (iold
< old_view
.nr
) {
653 frold
= &old_view
.ranges
[iold
];
657 if (inew
< new_view
.nr
) {
658 frnew
= &new_view
.ranges
[inew
];
665 || int128_lt(frold
->addr
.start
, frnew
->addr
.start
)
666 || (int128_eq(frold
->addr
.start
, frnew
->addr
.start
)
667 && !flatrange_equal(frold
, frnew
)))) {
668 /* In old, but (not in new, or in new but attributes changed). */
671 MEMORY_LISTENER_UPDATE_REGION(frold
, as
, Reverse
, region_del
);
675 } else if (frold
&& frnew
&& flatrange_equal(frold
, frnew
)) {
676 /* In both (logging may have changed) */
679 if (frold
->dirty_log_mask
&& !frnew
->dirty_log_mask
) {
680 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Reverse
, log_stop
);
681 } else if (frnew
->dirty_log_mask
&& !frold
->dirty_log_mask
) {
682 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, log_start
);
692 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_add
);
701 static void address_space_update_topology(AddressSpace
*as
)
703 FlatView old_view
= as
->current_map
;
704 FlatView new_view
= generate_memory_topology(as
->root
);
706 address_space_update_topology_pass(as
, old_view
, new_view
, false);
707 address_space_update_topology_pass(as
, old_view
, new_view
, true);
709 as
->current_map
= new_view
;
710 flatview_destroy(&old_view
);
711 address_space_update_ioeventfds(as
);
714 static void memory_region_update_topology(MemoryRegion
*mr
)
716 if (memory_region_transaction_depth
) {
717 memory_region_update_pending
|= !mr
|| mr
->enabled
;
721 if (mr
&& !mr
->enabled
) {
725 if (address_space_memory
.root
) {
726 address_space_update_topology(&address_space_memory
);
728 if (address_space_io
.root
) {
729 address_space_update_topology(&address_space_io
);
732 memory_region_update_pending
= false;
735 void memory_region_transaction_begin(void)
737 ++memory_region_transaction_depth
;
740 void memory_region_transaction_commit(void)
742 assert(memory_region_transaction_depth
);
743 --memory_region_transaction_depth
;
744 if (!memory_region_transaction_depth
&& memory_region_update_pending
) {
745 memory_region_update_topology(NULL
);
749 static void memory_region_destructor_none(MemoryRegion
*mr
)
753 static void memory_region_destructor_ram(MemoryRegion
*mr
)
755 qemu_ram_free(mr
->ram_addr
);
758 static void memory_region_destructor_ram_from_ptr(MemoryRegion
*mr
)
760 qemu_ram_free_from_ptr(mr
->ram_addr
);
763 static void memory_region_destructor_iomem(MemoryRegion
*mr
)
765 cpu_unregister_io_memory(mr
->ram_addr
);
768 static void memory_region_destructor_rom_device(MemoryRegion
*mr
)
770 qemu_ram_free(mr
->ram_addr
& TARGET_PAGE_MASK
);
771 cpu_unregister_io_memory(mr
->ram_addr
& ~TARGET_PAGE_MASK
);
774 static bool memory_region_wrong_endianness(MemoryRegion
*mr
)
776 #ifdef TARGET_WORDS_BIGENDIAN
777 return mr
->ops
->endianness
== DEVICE_LITTLE_ENDIAN
;
779 return mr
->ops
->endianness
== DEVICE_BIG_ENDIAN
;
783 void memory_region_init(MemoryRegion
*mr
,
789 mr
->size
= int128_make64(size
);
790 if (size
== UINT64_MAX
) {
791 mr
->size
= int128_2_64();
796 mr
->terminates
= false;
799 mr
->readonly
= false;
800 mr
->rom_device
= false;
801 mr
->destructor
= memory_region_destructor_none
;
803 mr
->may_overlap
= false;
805 QTAILQ_INIT(&mr
->subregions
);
806 memset(&mr
->subregions_link
, 0, sizeof mr
->subregions_link
);
807 QTAILQ_INIT(&mr
->coalesced
);
808 mr
->name
= g_strdup(name
);
809 mr
->dirty_log_mask
= 0;
810 mr
->ioeventfd_nb
= 0;
811 mr
->ioeventfds
= NULL
;
814 static bool memory_region_access_valid(MemoryRegion
*mr
,
815 target_phys_addr_t addr
,
819 if (mr
->ops
->valid
.accepts
820 && !mr
->ops
->valid
.accepts(mr
->opaque
, addr
, size
, is_write
)) {
824 if (!mr
->ops
->valid
.unaligned
&& (addr
& (size
- 1))) {
828 /* Treat zero as compatibility all valid */
829 if (!mr
->ops
->valid
.max_access_size
) {
833 if (size
> mr
->ops
->valid
.max_access_size
834 || size
< mr
->ops
->valid
.min_access_size
) {
840 static uint64_t memory_region_dispatch_read1(MemoryRegion
*mr
,
841 target_phys_addr_t addr
,
846 if (!memory_region_access_valid(mr
, addr
, size
, false)) {
847 return -1U; /* FIXME: better signalling */
850 if (!mr
->ops
->read
) {
851 return mr
->ops
->old_mmio
.read
[bitops_ffsl(size
)](mr
->opaque
, addr
);
854 /* FIXME: support unaligned access */
855 access_with_adjusted_size(addr
, &data
, size
,
856 mr
->ops
->impl
.min_access_size
,
857 mr
->ops
->impl
.max_access_size
,
858 memory_region_read_accessor
, mr
);
863 static void adjust_endianness(MemoryRegion
*mr
, uint64_t *data
, unsigned size
)
865 if (memory_region_wrong_endianness(mr
)) {
870 *data
= bswap16(*data
);
873 *data
= bswap32(*data
);
881 static uint64_t memory_region_dispatch_read(MemoryRegion
*mr
,
882 target_phys_addr_t addr
,
887 ret
= memory_region_dispatch_read1(mr
, addr
, size
);
888 adjust_endianness(mr
, &ret
, size
);
892 static void memory_region_dispatch_write(MemoryRegion
*mr
,
893 target_phys_addr_t addr
,
897 if (!memory_region_access_valid(mr
, addr
, size
, true)) {
898 return; /* FIXME: better signalling */
901 adjust_endianness(mr
, &data
, size
);
903 if (!mr
->ops
->write
) {
904 mr
->ops
->old_mmio
.write
[bitops_ffsl(size
)](mr
->opaque
, addr
, data
);
908 /* FIXME: support unaligned access */
909 access_with_adjusted_size(addr
, &data
, size
,
910 mr
->ops
->impl
.min_access_size
,
911 mr
->ops
->impl
.max_access_size
,
912 memory_region_write_accessor
, mr
);
915 void memory_region_init_io(MemoryRegion
*mr
,
916 const MemoryRegionOps
*ops
,
921 memory_region_init(mr
, name
, size
);
924 mr
->terminates
= true;
925 mr
->destructor
= memory_region_destructor_iomem
;
926 mr
->ram_addr
= cpu_register_io_memory(mr
);
929 void memory_region_init_ram(MemoryRegion
*mr
,
933 memory_region_init(mr
, name
, size
);
935 mr
->terminates
= true;
936 mr
->destructor
= memory_region_destructor_ram
;
937 mr
->ram_addr
= qemu_ram_alloc(size
, mr
);
940 void memory_region_init_ram_ptr(MemoryRegion
*mr
,
945 memory_region_init(mr
, name
, size
);
947 mr
->terminates
= true;
948 mr
->destructor
= memory_region_destructor_ram_from_ptr
;
949 mr
->ram_addr
= qemu_ram_alloc_from_ptr(size
, ptr
, mr
);
952 void memory_region_init_alias(MemoryRegion
*mr
,
955 target_phys_addr_t offset
,
958 memory_region_init(mr
, name
, size
);
960 mr
->alias_offset
= offset
;
963 void memory_region_init_rom_device(MemoryRegion
*mr
,
964 const MemoryRegionOps
*ops
,
969 memory_region_init(mr
, name
, size
);
972 mr
->terminates
= true;
973 mr
->rom_device
= true;
974 mr
->destructor
= memory_region_destructor_rom_device
;
975 mr
->ram_addr
= qemu_ram_alloc(size
, mr
);
976 mr
->ram_addr
|= cpu_register_io_memory(mr
);
979 static uint64_t invalid_read(void *opaque
, target_phys_addr_t addr
,
982 MemoryRegion
*mr
= opaque
;
984 if (!mr
->warning_printed
) {
985 fprintf(stderr
, "Invalid read from memory region %s\n", mr
->name
);
986 mr
->warning_printed
= true;
991 static void invalid_write(void *opaque
, target_phys_addr_t addr
, uint64_t data
,
994 MemoryRegion
*mr
= opaque
;
996 if (!mr
->warning_printed
) {
997 fprintf(stderr
, "Invalid write to memory region %s\n", mr
->name
);
998 mr
->warning_printed
= true;
1002 static const MemoryRegionOps reservation_ops
= {
1003 .read
= invalid_read
,
1004 .write
= invalid_write
,
1005 .endianness
= DEVICE_NATIVE_ENDIAN
,
1008 void memory_region_init_reservation(MemoryRegion
*mr
,
1012 memory_region_init_io(mr
, &reservation_ops
, mr
, name
, size
);
1015 void memory_region_destroy(MemoryRegion
*mr
)
1017 assert(QTAILQ_EMPTY(&mr
->subregions
));
1019 memory_region_clear_coalescing(mr
);
1020 g_free((char *)mr
->name
);
1021 g_free(mr
->ioeventfds
);
1024 uint64_t memory_region_size(MemoryRegion
*mr
)
1026 if (int128_eq(mr
->size
, int128_2_64())) {
1029 return int128_get64(mr
->size
);
1032 const char *memory_region_name(MemoryRegion
*mr
)
1037 bool memory_region_is_ram(MemoryRegion
*mr
)
1042 bool memory_region_is_logging(MemoryRegion
*mr
)
1044 return mr
->dirty_log_mask
;
1047 bool memory_region_is_rom(MemoryRegion
*mr
)
1049 return mr
->ram
&& mr
->readonly
;
1052 void memory_region_set_log(MemoryRegion
*mr
, bool log
, unsigned client
)
1054 uint8_t mask
= 1 << client
;
1056 mr
->dirty_log_mask
= (mr
->dirty_log_mask
& ~mask
) | (log
* mask
);
1057 memory_region_update_topology(mr
);
1060 bool memory_region_get_dirty(MemoryRegion
*mr
, target_phys_addr_t addr
,
1061 target_phys_addr_t size
, unsigned client
)
1063 assert(mr
->terminates
);
1064 return cpu_physical_memory_get_dirty(mr
->ram_addr
+ addr
, size
,
1068 void memory_region_set_dirty(MemoryRegion
*mr
, target_phys_addr_t addr
,
1069 target_phys_addr_t size
)
1071 assert(mr
->terminates
);
1072 return cpu_physical_memory_set_dirty_range(mr
->ram_addr
+ addr
, size
, -1);
1075 void memory_region_sync_dirty_bitmap(MemoryRegion
*mr
)
1079 FOR_EACH_FLAT_RANGE(fr
, &address_space_memory
.current_map
) {
1081 MEMORY_LISTENER_UPDATE_REGION(fr
, &address_space_memory
,
1087 void memory_region_set_readonly(MemoryRegion
*mr
, bool readonly
)
1089 if (mr
->readonly
!= readonly
) {
1090 mr
->readonly
= readonly
;
1091 memory_region_update_topology(mr
);
1095 void memory_region_rom_device_set_readable(MemoryRegion
*mr
, bool readable
)
1097 if (mr
->readable
!= readable
) {
1098 mr
->readable
= readable
;
1099 memory_region_update_topology(mr
);
1103 void memory_region_reset_dirty(MemoryRegion
*mr
, target_phys_addr_t addr
,
1104 target_phys_addr_t size
, unsigned client
)
1106 assert(mr
->terminates
);
1107 cpu_physical_memory_reset_dirty(mr
->ram_addr
+ addr
,
1108 mr
->ram_addr
+ addr
+ size
,
1112 void *memory_region_get_ram_ptr(MemoryRegion
*mr
)
1115 return memory_region_get_ram_ptr(mr
->alias
) + mr
->alias_offset
;
1118 assert(mr
->terminates
);
1120 return qemu_get_ram_ptr(mr
->ram_addr
& TARGET_PAGE_MASK
);
1123 static void memory_region_update_coalesced_range(MemoryRegion
*mr
)
1126 CoalescedMemoryRange
*cmr
;
1129 FOR_EACH_FLAT_RANGE(fr
, &address_space_memory
.current_map
) {
1131 qemu_unregister_coalesced_mmio(int128_get64(fr
->addr
.start
),
1132 int128_get64(fr
->addr
.size
));
1133 QTAILQ_FOREACH(cmr
, &mr
->coalesced
, link
) {
1134 tmp
= addrrange_shift(cmr
->addr
,
1135 int128_sub(fr
->addr
.start
,
1136 int128_make64(fr
->offset_in_region
)));
1137 if (!addrrange_intersects(tmp
, fr
->addr
)) {
1140 tmp
= addrrange_intersection(tmp
, fr
->addr
);
1141 qemu_register_coalesced_mmio(int128_get64(tmp
.start
),
1142 int128_get64(tmp
.size
));
1148 void memory_region_set_coalescing(MemoryRegion
*mr
)
1150 memory_region_clear_coalescing(mr
);
1151 memory_region_add_coalescing(mr
, 0, int128_get64(mr
->size
));
1154 void memory_region_add_coalescing(MemoryRegion
*mr
,
1155 target_phys_addr_t offset
,
1158 CoalescedMemoryRange
*cmr
= g_malloc(sizeof(*cmr
));
1160 cmr
->addr
= addrrange_make(int128_make64(offset
), int128_make64(size
));
1161 QTAILQ_INSERT_TAIL(&mr
->coalesced
, cmr
, link
);
1162 memory_region_update_coalesced_range(mr
);
1165 void memory_region_clear_coalescing(MemoryRegion
*mr
)
1167 CoalescedMemoryRange
*cmr
;
1169 while (!QTAILQ_EMPTY(&mr
->coalesced
)) {
1170 cmr
= QTAILQ_FIRST(&mr
->coalesced
);
1171 QTAILQ_REMOVE(&mr
->coalesced
, cmr
, link
);
1174 memory_region_update_coalesced_range(mr
);
1177 void memory_region_add_eventfd(MemoryRegion
*mr
,
1178 target_phys_addr_t addr
,
1184 MemoryRegionIoeventfd mrfd
= {
1185 .addr
.start
= int128_make64(addr
),
1186 .addr
.size
= int128_make64(size
),
1187 .match_data
= match_data
,
1193 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
1194 if (memory_region_ioeventfd_before(mrfd
, mr
->ioeventfds
[i
])) {
1199 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
1200 sizeof(*mr
->ioeventfds
) * mr
->ioeventfd_nb
);
1201 memmove(&mr
->ioeventfds
[i
+1], &mr
->ioeventfds
[i
],
1202 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
-1 - i
));
1203 mr
->ioeventfds
[i
] = mrfd
;
1204 memory_region_update_topology(mr
);
1207 void memory_region_del_eventfd(MemoryRegion
*mr
,
1208 target_phys_addr_t addr
,
1214 MemoryRegionIoeventfd mrfd
= {
1215 .addr
.start
= int128_make64(addr
),
1216 .addr
.size
= int128_make64(size
),
1217 .match_data
= match_data
,
1223 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
1224 if (memory_region_ioeventfd_equal(mrfd
, mr
->ioeventfds
[i
])) {
1228 assert(i
!= mr
->ioeventfd_nb
);
1229 memmove(&mr
->ioeventfds
[i
], &mr
->ioeventfds
[i
+1],
1230 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
- (i
+1)));
1232 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
1233 sizeof(*mr
->ioeventfds
)*mr
->ioeventfd_nb
+ 1);
1234 memory_region_update_topology(mr
);
1237 static void memory_region_add_subregion_common(MemoryRegion
*mr
,
1238 target_phys_addr_t offset
,
1239 MemoryRegion
*subregion
)
1241 MemoryRegion
*other
;
1243 assert(!subregion
->parent
);
1244 subregion
->parent
= mr
;
1245 subregion
->addr
= offset
;
1246 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
1247 if (subregion
->may_overlap
|| other
->may_overlap
) {
1250 if (int128_gt(int128_make64(offset
),
1251 int128_add(int128_make64(other
->addr
), other
->size
))
1252 || int128_le(int128_add(int128_make64(offset
), subregion
->size
),
1253 int128_make64(other
->addr
))) {
1257 printf("warning: subregion collision %llx/%llx (%s) "
1258 "vs %llx/%llx (%s)\n",
1259 (unsigned long long)offset
,
1260 (unsigned long long)int128_get64(subregion
->size
),
1262 (unsigned long long)other
->addr
,
1263 (unsigned long long)int128_get64(other
->size
),
1267 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
1268 if (subregion
->priority
>= other
->priority
) {
1269 QTAILQ_INSERT_BEFORE(other
, subregion
, subregions_link
);
1273 QTAILQ_INSERT_TAIL(&mr
->subregions
, subregion
, subregions_link
);
1275 memory_region_update_topology(mr
);
1279 void memory_region_add_subregion(MemoryRegion
*mr
,
1280 target_phys_addr_t offset
,
1281 MemoryRegion
*subregion
)
1283 subregion
->may_overlap
= false;
1284 subregion
->priority
= 0;
1285 memory_region_add_subregion_common(mr
, offset
, subregion
);
1288 void memory_region_add_subregion_overlap(MemoryRegion
*mr
,
1289 target_phys_addr_t offset
,
1290 MemoryRegion
*subregion
,
1293 subregion
->may_overlap
= true;
1294 subregion
->priority
= priority
;
1295 memory_region_add_subregion_common(mr
, offset
, subregion
);
1298 void memory_region_del_subregion(MemoryRegion
*mr
,
1299 MemoryRegion
*subregion
)
1301 assert(subregion
->parent
== mr
);
1302 subregion
->parent
= NULL
;
1303 QTAILQ_REMOVE(&mr
->subregions
, subregion
, subregions_link
);
1304 memory_region_update_topology(mr
);
1307 void memory_region_set_enabled(MemoryRegion
*mr
, bool enabled
)
1309 if (enabled
== mr
->enabled
) {
1312 mr
->enabled
= enabled
;
1313 memory_region_update_topology(NULL
);
1316 void memory_region_set_address(MemoryRegion
*mr
, target_phys_addr_t addr
)
1318 MemoryRegion
*parent
= mr
->parent
;
1319 unsigned priority
= mr
->priority
;
1320 bool may_overlap
= mr
->may_overlap
;
1322 if (addr
== mr
->addr
|| !parent
) {
1327 memory_region_transaction_begin();
1328 memory_region_del_subregion(parent
, mr
);
1330 memory_region_add_subregion_overlap(parent
, addr
, mr
, priority
);
1332 memory_region_add_subregion(parent
, addr
, mr
);
1334 memory_region_transaction_commit();
1337 void memory_region_set_alias_offset(MemoryRegion
*mr
, target_phys_addr_t offset
)
1339 target_phys_addr_t old_offset
= mr
->alias_offset
;
1342 mr
->alias_offset
= offset
;
1344 if (offset
== old_offset
|| !mr
->parent
) {
1348 memory_region_update_topology(mr
);
1351 ram_addr_t
memory_region_get_ram_addr(MemoryRegion
*mr
)
1353 return mr
->ram_addr
;
1356 static int cmp_flatrange_addr(const void *addr_
, const void *fr_
)
1358 const AddrRange
*addr
= addr_
;
1359 const FlatRange
*fr
= fr_
;
1361 if (int128_le(addrrange_end(*addr
), fr
->addr
.start
)) {
1363 } else if (int128_ge(addr
->start
, addrrange_end(fr
->addr
))) {
1369 static FlatRange
*address_space_lookup(AddressSpace
*as
, AddrRange addr
)
1371 return bsearch(&addr
, as
->current_map
.ranges
, as
->current_map
.nr
,
1372 sizeof(FlatRange
), cmp_flatrange_addr
);
1375 MemoryRegionSection
memory_region_find(MemoryRegion
*address_space
,
1376 target_phys_addr_t addr
, uint64_t size
)
1378 AddressSpace
*as
= memory_region_to_address_space(address_space
);
1379 AddrRange range
= addrrange_make(int128_make64(addr
),
1380 int128_make64(size
));
1381 FlatRange
*fr
= address_space_lookup(as
, range
);
1382 MemoryRegionSection ret
= { .mr
= NULL
, .size
= 0 };
1388 while (fr
> as
->current_map
.ranges
1389 && addrrange_intersects(fr
[-1].addr
, range
)) {
1394 range
= addrrange_intersection(range
, fr
->addr
);
1395 ret
.offset_within_region
= fr
->offset_in_region
;
1396 ret
.offset_within_region
+= int128_get64(int128_sub(range
.start
,
1398 ret
.size
= int128_get64(range
.size
);
1399 ret
.offset_within_address_space
= int128_get64(range
.start
);
1400 ret
.readonly
= fr
->readonly
;
1404 void memory_global_sync_dirty_bitmap(MemoryRegion
*address_space
)
1406 AddressSpace
*as
= memory_region_to_address_space(address_space
);
1409 FOR_EACH_FLAT_RANGE(fr
, &as
->current_map
) {
1410 MEMORY_LISTENER_UPDATE_REGION(fr
, as
, Forward
, log_sync
);
1414 void memory_global_dirty_log_start(void)
1416 global_dirty_log
= true;
1417 MEMORY_LISTENER_CALL_GLOBAL(log_global_start
, Forward
);
1420 void memory_global_dirty_log_stop(void)
1422 global_dirty_log
= false;
1423 MEMORY_LISTENER_CALL_GLOBAL(log_global_stop
, Reverse
);
1426 static void listener_add_address_space(MemoryListener
*listener
,
1431 if (global_dirty_log
) {
1432 listener
->log_global_start(listener
);
1434 FOR_EACH_FLAT_RANGE(fr
, &as
->current_map
) {
1435 MemoryRegionSection section
= {
1437 .address_space
= as
->root
,
1438 .offset_within_region
= fr
->offset_in_region
,
1439 .size
= int128_get64(fr
->addr
.size
),
1440 .offset_within_address_space
= int128_get64(fr
->addr
.start
),
1441 .readonly
= fr
->readonly
,
1443 listener
->region_add(listener
, §ion
);
1447 void memory_listener_register(MemoryListener
*listener
, MemoryRegion
*filter
)
1449 MemoryListener
*other
= NULL
;
1451 listener
->address_space_filter
= filter
;
1452 if (QTAILQ_EMPTY(&memory_listeners
)
1453 || listener
->priority
>= QTAILQ_LAST(&memory_listeners
,
1454 memory_listeners
)->priority
) {
1455 QTAILQ_INSERT_TAIL(&memory_listeners
, listener
, link
);
1457 QTAILQ_FOREACH(other
, &memory_listeners
, link
) {
1458 if (listener
->priority
< other
->priority
) {
1462 QTAILQ_INSERT_BEFORE(other
, listener
, link
);
1464 listener_add_address_space(listener
, &address_space_memory
);
1465 listener_add_address_space(listener
, &address_space_io
);
1468 void memory_listener_unregister(MemoryListener
*listener
)
1470 QTAILQ_REMOVE(&memory_listeners
, listener
, link
);
1473 void set_system_memory_map(MemoryRegion
*mr
)
1475 address_space_memory
.root
= mr
;
1476 memory_region_update_topology(NULL
);
1479 void set_system_io_map(MemoryRegion
*mr
)
1481 address_space_io
.root
= mr
;
1482 memory_region_update_topology(NULL
);
1485 uint64_t io_mem_read(int io_index
, target_phys_addr_t addr
, unsigned size
)
1487 return memory_region_dispatch_read(io_mem_region
[io_index
], addr
, size
);
1490 void io_mem_write(int io_index
, target_phys_addr_t addr
,
1491 uint64_t val
, unsigned size
)
1493 memory_region_dispatch_write(io_mem_region
[io_index
], addr
, val
, size
);
1496 typedef struct MemoryRegionList MemoryRegionList
;
1498 struct MemoryRegionList
{
1499 const MemoryRegion
*mr
;
1501 QTAILQ_ENTRY(MemoryRegionList
) queue
;
1504 typedef QTAILQ_HEAD(queue
, MemoryRegionList
) MemoryRegionListHead
;
1506 static void mtree_print_mr(fprintf_function mon_printf
, void *f
,
1507 const MemoryRegion
*mr
, unsigned int level
,
1508 target_phys_addr_t base
,
1509 MemoryRegionListHead
*alias_print_queue
)
1511 MemoryRegionList
*new_ml
, *ml
, *next_ml
;
1512 MemoryRegionListHead submr_print_queue
;
1513 const MemoryRegion
*submr
;
1520 for (i
= 0; i
< level
; i
++) {
1525 MemoryRegionList
*ml
;
1528 /* check if the alias is already in the queue */
1529 QTAILQ_FOREACH(ml
, alias_print_queue
, queue
) {
1530 if (ml
->mr
== mr
->alias
&& !ml
->printed
) {
1536 ml
= g_new(MemoryRegionList
, 1);
1538 ml
->printed
= false;
1539 QTAILQ_INSERT_TAIL(alias_print_queue
, ml
, queue
);
1541 mon_printf(f
, TARGET_FMT_plx
"-" TARGET_FMT_plx
1542 " (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx
1543 "-" TARGET_FMT_plx
"\n",
1546 + (target_phys_addr_t
)int128_get64(mr
->size
) - 1,
1548 mr
->readable
? 'R' : '-',
1549 !mr
->readonly
&& !(mr
->rom_device
&& mr
->readable
) ? 'W'
1555 + (target_phys_addr_t
)int128_get64(mr
->size
) - 1);
1558 TARGET_FMT_plx
"-" TARGET_FMT_plx
" (prio %d, %c%c): %s\n",
1561 + (target_phys_addr_t
)int128_get64(mr
->size
) - 1,
1563 mr
->readable
? 'R' : '-',
1564 !mr
->readonly
&& !(mr
->rom_device
&& mr
->readable
) ? 'W'
1569 QTAILQ_INIT(&submr_print_queue
);
1571 QTAILQ_FOREACH(submr
, &mr
->subregions
, subregions_link
) {
1572 new_ml
= g_new(MemoryRegionList
, 1);
1574 QTAILQ_FOREACH(ml
, &submr_print_queue
, queue
) {
1575 if (new_ml
->mr
->addr
< ml
->mr
->addr
||
1576 (new_ml
->mr
->addr
== ml
->mr
->addr
&&
1577 new_ml
->mr
->priority
> ml
->mr
->priority
)) {
1578 QTAILQ_INSERT_BEFORE(ml
, new_ml
, queue
);
1584 QTAILQ_INSERT_TAIL(&submr_print_queue
, new_ml
, queue
);
1588 QTAILQ_FOREACH(ml
, &submr_print_queue
, queue
) {
1589 mtree_print_mr(mon_printf
, f
, ml
->mr
, level
+ 1, base
+ mr
->addr
,
1593 QTAILQ_FOREACH_SAFE(ml
, &submr_print_queue
, queue
, next_ml
) {
1598 void mtree_info(fprintf_function mon_printf
, void *f
)
1600 MemoryRegionListHead ml_head
;
1601 MemoryRegionList
*ml
, *ml2
;
1603 QTAILQ_INIT(&ml_head
);
1605 mon_printf(f
, "memory\n");
1606 mtree_print_mr(mon_printf
, f
, address_space_memory
.root
, 0, 0, &ml_head
);
1608 /* print aliased regions */
1609 QTAILQ_FOREACH(ml
, &ml_head
, queue
) {
1611 mon_printf(f
, "%s\n", ml
->mr
->name
);
1612 mtree_print_mr(mon_printf
, f
, ml
->mr
, 0, 0, &ml_head
);
1616 QTAILQ_FOREACH_SAFE(ml
, &ml_head
, queue
, ml2
) {
1620 if (address_space_io
.root
&&
1621 !QTAILQ_EMPTY(&address_space_io
.root
->subregions
)) {
1622 QTAILQ_INIT(&ml_head
);
1623 mon_printf(f
, "I/O\n");
1624 mtree_print_mr(mon_printf
, f
, address_space_io
.root
, 0, 0, &ml_head
);