2 * Physical memory management
4 * Copyright 2011 Red Hat, Inc. and/or its affiliates
7 * Avi Kivity <avi@redhat.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
12 * Contributions after 2012-01-13 are licensed under the terms of the
13 * GNU GPL, version 2 or (at your option) any later version.
16 #include "exec/memory.h"
17 #include "exec/address-spaces.h"
18 #include "exec/ioport.h"
19 #include "qapi/visitor.h"
20 #include "qemu/bitops.h"
21 #include "qom/object.h"
25 #include "exec/memory-internal.h"
26 #include "exec/ram_addr.h"
27 #include "sysemu/sysemu.h"
29 static unsigned memory_region_transaction_depth
;
30 static bool memory_region_update_pending
;
31 static bool ioeventfd_update_pending
;
32 static bool global_dirty_log
= false;
34 /* flat_view_mutex is taken around reading as->current_map; the critical
35 * section is extremely short, so I'm using a single mutex for every AS.
36 * We could also RCU for the read-side.
38 * The BQL is taken around transaction commits, hence both locks are taken
39 * while writing to as->current_map (with the BQL taken outside).
41 static QemuMutex flat_view_mutex
;
43 static QTAILQ_HEAD(memory_listeners
, MemoryListener
) memory_listeners
44 = QTAILQ_HEAD_INITIALIZER(memory_listeners
);
46 static QTAILQ_HEAD(, AddressSpace
) address_spaces
47 = QTAILQ_HEAD_INITIALIZER(address_spaces
);
49 static void memory_init(void)
51 qemu_mutex_init(&flat_view_mutex
);
54 typedef struct AddrRange AddrRange
;
57 * Note that signed integers are needed for negative offsetting in aliases
58 * (large MemoryRegion::alias_offset).
65 static AddrRange
addrrange_make(Int128 start
, Int128 size
)
67 return (AddrRange
) { start
, size
};
70 static bool addrrange_equal(AddrRange r1
, AddrRange r2
)
72 return int128_eq(r1
.start
, r2
.start
) && int128_eq(r1
.size
, r2
.size
);
75 static Int128
addrrange_end(AddrRange r
)
77 return int128_add(r
.start
, r
.size
);
80 static AddrRange
addrrange_shift(AddrRange range
, Int128 delta
)
82 int128_addto(&range
.start
, delta
);
86 static bool addrrange_contains(AddrRange range
, Int128 addr
)
88 return int128_ge(addr
, range
.start
)
89 && int128_lt(addr
, addrrange_end(range
));
92 static bool addrrange_intersects(AddrRange r1
, AddrRange r2
)
94 return addrrange_contains(r1
, r2
.start
)
95 || addrrange_contains(r2
, r1
.start
);
98 static AddrRange
addrrange_intersection(AddrRange r1
, AddrRange r2
)
100 Int128 start
= int128_max(r1
.start
, r2
.start
);
101 Int128 end
= int128_min(addrrange_end(r1
), addrrange_end(r2
));
102 return addrrange_make(start
, int128_sub(end
, start
));
105 enum ListenerDirection
{ Forward
, Reverse
};
107 static bool memory_listener_match(MemoryListener
*listener
,
108 MemoryRegionSection
*section
)
110 return !listener
->address_space_filter
111 || listener
->address_space_filter
== section
->address_space
;
114 #define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
116 MemoryListener *_listener; \
118 switch (_direction) { \
120 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
121 if (_listener->_callback) { \
122 _listener->_callback(_listener, ##_args); \
127 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
128 memory_listeners, link) { \
129 if (_listener->_callback) { \
130 _listener->_callback(_listener, ##_args); \
139 #define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \
141 MemoryListener *_listener; \
143 switch (_direction) { \
145 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
146 if (_listener->_callback \
147 && memory_listener_match(_listener, _section)) { \
148 _listener->_callback(_listener, _section, ##_args); \
153 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
154 memory_listeners, link) { \
155 if (_listener->_callback \
156 && memory_listener_match(_listener, _section)) { \
157 _listener->_callback(_listener, _section, ##_args); \
166 /* No need to ref/unref .mr, the FlatRange keeps it alive. */
167 #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \
168 MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \
170 .address_space = (as), \
171 .offset_within_region = (fr)->offset_in_region, \
172 .size = (fr)->addr.size, \
173 .offset_within_address_space = int128_get64((fr)->addr.start), \
174 .readonly = (fr)->readonly, \
177 struct CoalescedMemoryRange
{
179 QTAILQ_ENTRY(CoalescedMemoryRange
) link
;
182 struct MemoryRegionIoeventfd
{
189 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a
,
190 MemoryRegionIoeventfd b
)
192 if (int128_lt(a
.addr
.start
, b
.addr
.start
)) {
194 } else if (int128_gt(a
.addr
.start
, b
.addr
.start
)) {
196 } else if (int128_lt(a
.addr
.size
, b
.addr
.size
)) {
198 } else if (int128_gt(a
.addr
.size
, b
.addr
.size
)) {
200 } else if (a
.match_data
< b
.match_data
) {
202 } else if (a
.match_data
> b
.match_data
) {
204 } else if (a
.match_data
) {
205 if (a
.data
< b
.data
) {
207 } else if (a
.data
> b
.data
) {
213 } else if (a
.e
> b
.e
) {
219 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a
,
220 MemoryRegionIoeventfd b
)
222 return !memory_region_ioeventfd_before(a
, b
)
223 && !memory_region_ioeventfd_before(b
, a
);
226 typedef struct FlatRange FlatRange
;
227 typedef struct FlatView FlatView
;
229 /* Range of memory in the global map. Addresses are absolute. */
232 hwaddr offset_in_region
;
234 uint8_t dirty_log_mask
;
239 /* Flattened global view of current active memory hierarchy. Kept in sorted
246 unsigned nr_allocated
;
249 typedef struct AddressSpaceOps AddressSpaceOps
;
251 #define FOR_EACH_FLAT_RANGE(var, view) \
252 for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
254 static bool flatrange_equal(FlatRange
*a
, FlatRange
*b
)
256 return a
->mr
== b
->mr
257 && addrrange_equal(a
->addr
, b
->addr
)
258 && a
->offset_in_region
== b
->offset_in_region
259 && a
->romd_mode
== b
->romd_mode
260 && a
->readonly
== b
->readonly
;
263 static void flatview_init(FlatView
*view
)
268 view
->nr_allocated
= 0;
271 /* Insert a range into a given position. Caller is responsible for maintaining
274 static void flatview_insert(FlatView
*view
, unsigned pos
, FlatRange
*range
)
276 if (view
->nr
== view
->nr_allocated
) {
277 view
->nr_allocated
= MAX(2 * view
->nr
, 10);
278 view
->ranges
= g_realloc(view
->ranges
,
279 view
->nr_allocated
* sizeof(*view
->ranges
));
281 memmove(view
->ranges
+ pos
+ 1, view
->ranges
+ pos
,
282 (view
->nr
- pos
) * sizeof(FlatRange
));
283 view
->ranges
[pos
] = *range
;
284 memory_region_ref(range
->mr
);
288 static void flatview_destroy(FlatView
*view
)
292 for (i
= 0; i
< view
->nr
; i
++) {
293 memory_region_unref(view
->ranges
[i
].mr
);
295 g_free(view
->ranges
);
299 static void flatview_ref(FlatView
*view
)
301 atomic_inc(&view
->ref
);
304 static void flatview_unref(FlatView
*view
)
306 if (atomic_fetch_dec(&view
->ref
) == 1) {
307 flatview_destroy(view
);
311 static bool can_merge(FlatRange
*r1
, FlatRange
*r2
)
313 return int128_eq(addrrange_end(r1
->addr
), r2
->addr
.start
)
315 && int128_eq(int128_add(int128_make64(r1
->offset_in_region
),
317 int128_make64(r2
->offset_in_region
))
318 && r1
->dirty_log_mask
== r2
->dirty_log_mask
319 && r1
->romd_mode
== r2
->romd_mode
320 && r1
->readonly
== r2
->readonly
;
323 /* Attempt to simplify a view by merging adjacent ranges */
324 static void flatview_simplify(FlatView
*view
)
329 while (i
< view
->nr
) {
332 && can_merge(&view
->ranges
[j
-1], &view
->ranges
[j
])) {
333 int128_addto(&view
->ranges
[i
].addr
.size
, view
->ranges
[j
].addr
.size
);
337 memmove(&view
->ranges
[i
], &view
->ranges
[j
],
338 (view
->nr
- j
) * sizeof(view
->ranges
[j
]));
343 static bool memory_region_big_endian(MemoryRegion
*mr
)
345 #ifdef TARGET_WORDS_BIGENDIAN
346 return mr
->ops
->endianness
!= DEVICE_LITTLE_ENDIAN
;
348 return mr
->ops
->endianness
== DEVICE_BIG_ENDIAN
;
352 static bool memory_region_wrong_endianness(MemoryRegion
*mr
)
354 #ifdef TARGET_WORDS_BIGENDIAN
355 return mr
->ops
->endianness
== DEVICE_LITTLE_ENDIAN
;
357 return mr
->ops
->endianness
== DEVICE_BIG_ENDIAN
;
361 static void adjust_endianness(MemoryRegion
*mr
, uint64_t *data
, unsigned size
)
363 if (memory_region_wrong_endianness(mr
)) {
368 *data
= bswap16(*data
);
371 *data
= bswap32(*data
);
374 *data
= bswap64(*data
);
382 static void memory_region_oldmmio_read_accessor(MemoryRegion
*mr
,
391 tmp
= mr
->ops
->old_mmio
.read
[ctz32(size
)](mr
->opaque
, addr
);
392 trace_memory_region_ops_read(mr
, addr
, tmp
, size
);
393 *value
|= (tmp
& mask
) << shift
;
396 static void memory_region_read_accessor(MemoryRegion
*mr
,
405 if (mr
->flush_coalesced_mmio
) {
406 qemu_flush_coalesced_mmio_buffer();
408 tmp
= mr
->ops
->read(mr
->opaque
, addr
, size
);
409 trace_memory_region_ops_read(mr
, addr
, tmp
, size
);
410 *value
|= (tmp
& mask
) << shift
;
413 static void memory_region_oldmmio_write_accessor(MemoryRegion
*mr
,
422 tmp
= (*value
>> shift
) & mask
;
423 trace_memory_region_ops_write(mr
, addr
, tmp
, size
);
424 mr
->ops
->old_mmio
.write
[ctz32(size
)](mr
->opaque
, addr
, tmp
);
427 static void memory_region_write_accessor(MemoryRegion
*mr
,
436 if (mr
->flush_coalesced_mmio
) {
437 qemu_flush_coalesced_mmio_buffer();
439 tmp
= (*value
>> shift
) & mask
;
440 trace_memory_region_ops_write(mr
, addr
, tmp
, size
);
441 mr
->ops
->write(mr
->opaque
, addr
, tmp
, size
);
444 static void access_with_adjusted_size(hwaddr addr
,
447 unsigned access_size_min
,
448 unsigned access_size_max
,
449 void (*access
)(MemoryRegion
*mr
,
457 uint64_t access_mask
;
458 unsigned access_size
;
461 if (!access_size_min
) {
464 if (!access_size_max
) {
468 /* FIXME: support unaligned access? */
469 access_size
= MAX(MIN(size
, access_size_max
), access_size_min
);
470 access_mask
= -1ULL >> (64 - access_size
* 8);
471 if (memory_region_big_endian(mr
)) {
472 for (i
= 0; i
< size
; i
+= access_size
) {
473 access(mr
, addr
+ i
, value
, access_size
,
474 (size
- access_size
- i
) * 8, access_mask
);
477 for (i
= 0; i
< size
; i
+= access_size
) {
478 access(mr
, addr
+ i
, value
, access_size
, i
* 8, access_mask
);
483 static AddressSpace
*memory_region_to_address_space(MemoryRegion
*mr
)
487 while (mr
->container
) {
490 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
491 if (mr
== as
->root
) {
498 /* Render a memory region into the global view. Ranges in @view obscure
501 static void render_memory_region(FlatView
*view
,
507 MemoryRegion
*subregion
;
509 hwaddr offset_in_region
;
519 int128_addto(&base
, int128_make64(mr
->addr
));
520 readonly
|= mr
->readonly
;
522 tmp
= addrrange_make(base
, mr
->size
);
524 if (!addrrange_intersects(tmp
, clip
)) {
528 clip
= addrrange_intersection(tmp
, clip
);
531 int128_subfrom(&base
, int128_make64(mr
->alias
->addr
));
532 int128_subfrom(&base
, int128_make64(mr
->alias_offset
));
533 render_memory_region(view
, mr
->alias
, base
, clip
, readonly
);
537 /* Render subregions in priority order. */
538 QTAILQ_FOREACH(subregion
, &mr
->subregions
, subregions_link
) {
539 render_memory_region(view
, subregion
, base
, clip
, readonly
);
542 if (!mr
->terminates
) {
546 offset_in_region
= int128_get64(int128_sub(clip
.start
, base
));
551 fr
.dirty_log_mask
= mr
->dirty_log_mask
;
552 fr
.romd_mode
= mr
->romd_mode
;
553 fr
.readonly
= readonly
;
555 /* Render the region itself into any gaps left by the current view. */
556 for (i
= 0; i
< view
->nr
&& int128_nz(remain
); ++i
) {
557 if (int128_ge(base
, addrrange_end(view
->ranges
[i
].addr
))) {
560 if (int128_lt(base
, view
->ranges
[i
].addr
.start
)) {
561 now
= int128_min(remain
,
562 int128_sub(view
->ranges
[i
].addr
.start
, base
));
563 fr
.offset_in_region
= offset_in_region
;
564 fr
.addr
= addrrange_make(base
, now
);
565 flatview_insert(view
, i
, &fr
);
567 int128_addto(&base
, now
);
568 offset_in_region
+= int128_get64(now
);
569 int128_subfrom(&remain
, now
);
571 now
= int128_sub(int128_min(int128_add(base
, remain
),
572 addrrange_end(view
->ranges
[i
].addr
)),
574 int128_addto(&base
, now
);
575 offset_in_region
+= int128_get64(now
);
576 int128_subfrom(&remain
, now
);
578 if (int128_nz(remain
)) {
579 fr
.offset_in_region
= offset_in_region
;
580 fr
.addr
= addrrange_make(base
, remain
);
581 flatview_insert(view
, i
, &fr
);
585 /* Render a memory topology into a list of disjoint absolute ranges. */
586 static FlatView
*generate_memory_topology(MemoryRegion
*mr
)
590 view
= g_new(FlatView
, 1);
594 render_memory_region(view
, mr
, int128_zero(),
595 addrrange_make(int128_zero(), int128_2_64()), false);
597 flatview_simplify(view
);
602 static void address_space_add_del_ioeventfds(AddressSpace
*as
,
603 MemoryRegionIoeventfd
*fds_new
,
605 MemoryRegionIoeventfd
*fds_old
,
609 MemoryRegionIoeventfd
*fd
;
610 MemoryRegionSection section
;
612 /* Generate a symmetric difference of the old and new fd sets, adding
613 * and deleting as necessary.
617 while (iold
< fds_old_nb
|| inew
< fds_new_nb
) {
618 if (iold
< fds_old_nb
619 && (inew
== fds_new_nb
620 || memory_region_ioeventfd_before(fds_old
[iold
],
623 section
= (MemoryRegionSection
) {
625 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
626 .size
= fd
->addr
.size
,
628 MEMORY_LISTENER_CALL(eventfd_del
, Forward
, §ion
,
629 fd
->match_data
, fd
->data
, fd
->e
);
631 } else if (inew
< fds_new_nb
632 && (iold
== fds_old_nb
633 || memory_region_ioeventfd_before(fds_new
[inew
],
636 section
= (MemoryRegionSection
) {
638 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
639 .size
= fd
->addr
.size
,
641 MEMORY_LISTENER_CALL(eventfd_add
, Reverse
, §ion
,
642 fd
->match_data
, fd
->data
, fd
->e
);
651 static FlatView
*address_space_get_flatview(AddressSpace
*as
)
655 qemu_mutex_lock(&flat_view_mutex
);
656 view
= as
->current_map
;
658 qemu_mutex_unlock(&flat_view_mutex
);
662 static void address_space_update_ioeventfds(AddressSpace
*as
)
666 unsigned ioeventfd_nb
= 0;
667 MemoryRegionIoeventfd
*ioeventfds
= NULL
;
671 view
= address_space_get_flatview(as
);
672 FOR_EACH_FLAT_RANGE(fr
, view
) {
673 for (i
= 0; i
< fr
->mr
->ioeventfd_nb
; ++i
) {
674 tmp
= addrrange_shift(fr
->mr
->ioeventfds
[i
].addr
,
675 int128_sub(fr
->addr
.start
,
676 int128_make64(fr
->offset_in_region
)));
677 if (addrrange_intersects(fr
->addr
, tmp
)) {
679 ioeventfds
= g_realloc(ioeventfds
,
680 ioeventfd_nb
* sizeof(*ioeventfds
));
681 ioeventfds
[ioeventfd_nb
-1] = fr
->mr
->ioeventfds
[i
];
682 ioeventfds
[ioeventfd_nb
-1].addr
= tmp
;
687 address_space_add_del_ioeventfds(as
, ioeventfds
, ioeventfd_nb
,
688 as
->ioeventfds
, as
->ioeventfd_nb
);
690 g_free(as
->ioeventfds
);
691 as
->ioeventfds
= ioeventfds
;
692 as
->ioeventfd_nb
= ioeventfd_nb
;
693 flatview_unref(view
);
696 static void address_space_update_topology_pass(AddressSpace
*as
,
697 const FlatView
*old_view
,
698 const FlatView
*new_view
,
702 FlatRange
*frold
, *frnew
;
704 /* Generate a symmetric difference of the old and new memory maps.
705 * Kill ranges in the old map, and instantiate ranges in the new map.
708 while (iold
< old_view
->nr
|| inew
< new_view
->nr
) {
709 if (iold
< old_view
->nr
) {
710 frold
= &old_view
->ranges
[iold
];
714 if (inew
< new_view
->nr
) {
715 frnew
= &new_view
->ranges
[inew
];
722 || int128_lt(frold
->addr
.start
, frnew
->addr
.start
)
723 || (int128_eq(frold
->addr
.start
, frnew
->addr
.start
)
724 && !flatrange_equal(frold
, frnew
)))) {
725 /* In old but not in new, or in both but attributes changed. */
728 MEMORY_LISTENER_UPDATE_REGION(frold
, as
, Reverse
, region_del
);
732 } else if (frold
&& frnew
&& flatrange_equal(frold
, frnew
)) {
733 /* In both and unchanged (except logging may have changed) */
736 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_nop
);
737 if (frold
->dirty_log_mask
&& !frnew
->dirty_log_mask
) {
738 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Reverse
, log_stop
);
739 } else if (frnew
->dirty_log_mask
&& !frold
->dirty_log_mask
) {
740 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, log_start
);
750 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_add
);
759 static void address_space_update_topology(AddressSpace
*as
)
761 FlatView
*old_view
= address_space_get_flatview(as
);
762 FlatView
*new_view
= generate_memory_topology(as
->root
);
764 address_space_update_topology_pass(as
, old_view
, new_view
, false);
765 address_space_update_topology_pass(as
, old_view
, new_view
, true);
767 qemu_mutex_lock(&flat_view_mutex
);
768 flatview_unref(as
->current_map
);
769 as
->current_map
= new_view
;
770 qemu_mutex_unlock(&flat_view_mutex
);
772 /* Note that all the old MemoryRegions are still alive up to this
773 * point. This relieves most MemoryListeners from the need to
774 * ref/unref the MemoryRegions they get---unless they use them
775 * outside the iothread mutex, in which case precise reference
776 * counting is necessary.
778 flatview_unref(old_view
);
780 address_space_update_ioeventfds(as
);
783 void memory_region_transaction_begin(void)
785 qemu_flush_coalesced_mmio_buffer();
786 ++memory_region_transaction_depth
;
789 static void memory_region_clear_pending(void)
791 memory_region_update_pending
= false;
792 ioeventfd_update_pending
= false;
795 void memory_region_transaction_commit(void)
799 assert(memory_region_transaction_depth
);
800 --memory_region_transaction_depth
;
801 if (!memory_region_transaction_depth
) {
802 if (memory_region_update_pending
) {
803 MEMORY_LISTENER_CALL_GLOBAL(begin
, Forward
);
805 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
806 address_space_update_topology(as
);
809 MEMORY_LISTENER_CALL_GLOBAL(commit
, Forward
);
810 } else if (ioeventfd_update_pending
) {
811 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
812 address_space_update_ioeventfds(as
);
815 memory_region_clear_pending();
819 static void memory_region_destructor_none(MemoryRegion
*mr
)
823 static void memory_region_destructor_ram(MemoryRegion
*mr
)
825 qemu_ram_free(mr
->ram_addr
);
828 static void memory_region_destructor_alias(MemoryRegion
*mr
)
830 memory_region_unref(mr
->alias
);
833 static void memory_region_destructor_ram_from_ptr(MemoryRegion
*mr
)
835 qemu_ram_free_from_ptr(mr
->ram_addr
);
838 static void memory_region_destructor_rom_device(MemoryRegion
*mr
)
840 qemu_ram_free(mr
->ram_addr
& TARGET_PAGE_MASK
);
843 static bool memory_region_need_escape(char c
)
845 return c
== '/' || c
== '[' || c
== '\\' || c
== ']';
848 static char *memory_region_escape_name(const char *name
)
855 for (p
= name
; *p
; p
++) {
856 bytes
+= memory_region_need_escape(*p
) ? 4 : 1;
858 if (bytes
== p
- name
) {
859 return g_memdup(name
, bytes
+ 1);
862 escaped
= g_malloc(bytes
+ 1);
863 for (p
= name
, q
= escaped
; *p
; p
++) {
865 if (unlikely(memory_region_need_escape(c
))) {
868 *q
++ = "0123456789abcdef"[c
>> 4];
869 c
= "0123456789abcdef"[c
& 15];
877 void memory_region_init(MemoryRegion
*mr
,
883 owner
= qdev_get_machine();
886 object_initialize(mr
, sizeof(*mr
), TYPE_MEMORY_REGION
);
887 mr
->size
= int128_make64(size
);
888 if (size
== UINT64_MAX
) {
889 mr
->size
= int128_2_64();
891 mr
->name
= g_strdup(name
);
894 char *escaped_name
= memory_region_escape_name(name
);
895 char *name_array
= g_strdup_printf("%s[*]", escaped_name
);
896 object_property_add_child(owner
, name_array
, OBJECT(mr
), &error_abort
);
897 object_unref(OBJECT(mr
));
899 g_free(escaped_name
);
903 static void memory_region_get_addr(Object
*obj
, Visitor
*v
, void *opaque
,
904 const char *name
, Error
**errp
)
906 MemoryRegion
*mr
= MEMORY_REGION(obj
);
907 uint64_t value
= mr
->addr
;
909 visit_type_uint64(v
, &value
, name
, errp
);
912 static void memory_region_get_container(Object
*obj
, Visitor
*v
, void *opaque
,
913 const char *name
, Error
**errp
)
915 MemoryRegion
*mr
= MEMORY_REGION(obj
);
916 gchar
*path
= (gchar
*)"";
919 path
= object_get_canonical_path(OBJECT(mr
->container
));
921 visit_type_str(v
, &path
, name
, errp
);
927 static Object
*memory_region_resolve_container(Object
*obj
, void *opaque
,
930 MemoryRegion
*mr
= MEMORY_REGION(obj
);
932 return OBJECT(mr
->container
);
935 static void memory_region_get_priority(Object
*obj
, Visitor
*v
, void *opaque
,
936 const char *name
, Error
**errp
)
938 MemoryRegion
*mr
= MEMORY_REGION(obj
);
939 int32_t value
= mr
->priority
;
941 visit_type_int32(v
, &value
, name
, errp
);
944 static bool memory_region_get_may_overlap(Object
*obj
, Error
**errp
)
946 MemoryRegion
*mr
= MEMORY_REGION(obj
);
948 return mr
->may_overlap
;
951 static void memory_region_get_size(Object
*obj
, Visitor
*v
, void *opaque
,
952 const char *name
, Error
**errp
)
954 MemoryRegion
*mr
= MEMORY_REGION(obj
);
955 uint64_t value
= memory_region_size(mr
);
957 visit_type_uint64(v
, &value
, name
, errp
);
960 static void memory_region_initfn(Object
*obj
)
962 MemoryRegion
*mr
= MEMORY_REGION(obj
);
965 mr
->ops
= &unassigned_mem_ops
;
967 mr
->romd_mode
= true;
968 mr
->destructor
= memory_region_destructor_none
;
969 QTAILQ_INIT(&mr
->subregions
);
970 QTAILQ_INIT(&mr
->coalesced
);
972 op
= object_property_add(OBJECT(mr
), "container",
973 "link<" TYPE_MEMORY_REGION
">",
974 memory_region_get_container
,
975 NULL
, /* memory_region_set_container */
976 NULL
, NULL
, &error_abort
);
977 op
->resolve
= memory_region_resolve_container
;
979 object_property_add(OBJECT(mr
), "addr", "uint64",
980 memory_region_get_addr
,
981 NULL
, /* memory_region_set_addr */
982 NULL
, NULL
, &error_abort
);
983 object_property_add(OBJECT(mr
), "priority", "uint32",
984 memory_region_get_priority
,
985 NULL
, /* memory_region_set_priority */
986 NULL
, NULL
, &error_abort
);
987 object_property_add_bool(OBJECT(mr
), "may-overlap",
988 memory_region_get_may_overlap
,
989 NULL
, /* memory_region_set_may_overlap */
991 object_property_add(OBJECT(mr
), "size", "uint64",
992 memory_region_get_size
,
993 NULL
, /* memory_region_set_size, */
994 NULL
, NULL
, &error_abort
);
997 static int qemu_target_backtrace(target_ulong
*array
, size_t size
)
1001 #if defined(TARGET_ARM)
1002 CPUArchState
*env
= current_cpu
->env_ptr
;
1003 array
[0] = env
->regs
[15];
1004 array
[1] = env
->regs
[14];
1005 #elif defined(TARGET_MIPS)
1006 CPUArchState
*env
= current_cpu
->env_ptr
;
1007 array
[0] = env
->active_tc
.PC
;
1008 array
[1] = env
->active_tc
.gpr
[31];
1018 #include "disas/disas.h"
1019 const char *qemu_sprint_backtrace(char *buffer
, size_t length
)
1023 target_ulong caller
[2];
1025 qemu_target_backtrace(caller
, 2);
1026 symbol
= lookup_symbol(caller
[0]);
1027 p
+= sprintf(p
, "[%s]", symbol
);
1028 symbol
= lookup_symbol(caller
[1]);
1029 p
+= sprintf(p
, "[%s]", symbol
);
1031 p
+= sprintf(p
, "[cpu not running]");
1033 assert((p
- buffer
) < length
);
1037 static uint64_t unassigned_mem_read(void *opaque
, hwaddr addr
,
1040 if (trace_unassigned
) {
1042 fprintf(stderr
, "Unassigned mem read " TARGET_FMT_plx
" %s\n",
1043 addr
, qemu_sprint_backtrace(buffer
, sizeof(buffer
)));
1046 if (current_cpu
!= NULL
) {
1047 cpu_unassigned_access(current_cpu
, addr
, false, false, 0, size
);
1052 static void unassigned_mem_write(void *opaque
, hwaddr addr
,
1053 uint64_t val
, unsigned size
)
1055 if (trace_unassigned
) {
1057 fprintf(stderr
, "Unassigned mem write " TARGET_FMT_plx
1058 " = 0x%" PRIx64
" %s\n",
1059 addr
, val
, qemu_sprint_backtrace(buffer
, sizeof(buffer
)));
1061 if (current_cpu
!= NULL
) {
1062 cpu_unassigned_access(current_cpu
, addr
, true, false, 0, size
);
1066 static bool unassigned_mem_accepts(void *opaque
, hwaddr addr
,
1067 unsigned size
, bool is_write
)
1072 const MemoryRegionOps unassigned_mem_ops
= {
1073 .valid
.accepts
= unassigned_mem_accepts
,
1074 .endianness
= DEVICE_NATIVE_ENDIAN
,
1077 bool memory_region_access_valid(MemoryRegion
*mr
,
1082 int access_size_min
, access_size_max
;
1085 if (!mr
->ops
->valid
.unaligned
&& (addr
& (size
- 1))) {
1086 fprintf(stderr
, "Misaligned i/o with size %u for memory region %s\n",
1091 if (!mr
->ops
->valid
.accepts
) {
1095 access_size_min
= mr
->ops
->valid
.min_access_size
;
1096 if (!mr
->ops
->valid
.min_access_size
) {
1097 access_size_min
= 1;
1100 access_size_max
= mr
->ops
->valid
.max_access_size
;
1101 if (!mr
->ops
->valid
.max_access_size
) {
1102 access_size_max
= 4;
1105 access_size
= MAX(MIN(size
, access_size_max
), access_size_min
);
1106 for (i
= 0; i
< size
; i
+= access_size
) {
1107 if (!mr
->ops
->valid
.accepts(mr
->opaque
, addr
+ i
, access_size
,
1116 static uint64_t memory_region_dispatch_read1(MemoryRegion
*mr
,
1122 if (mr
->ops
->read
) {
1123 access_with_adjusted_size(addr
, &data
, size
,
1124 mr
->ops
->impl
.min_access_size
,
1125 mr
->ops
->impl
.max_access_size
,
1126 memory_region_read_accessor
, mr
);
1128 access_with_adjusted_size(addr
, &data
, size
, 1, 4,
1129 memory_region_oldmmio_read_accessor
, mr
);
1135 static bool memory_region_dispatch_read(MemoryRegion
*mr
,
1140 if (!memory_region_access_valid(mr
, addr
, size
, false)) {
1141 *pval
= unassigned_mem_read(mr
, addr
, size
);
1145 *pval
= memory_region_dispatch_read1(mr
, addr
, size
);
1146 adjust_endianness(mr
, pval
, size
);
1150 static bool memory_region_dispatch_write(MemoryRegion
*mr
,
1155 if (!memory_region_access_valid(mr
, addr
, size
, true)) {
1156 unassigned_mem_write(mr
, addr
, data
, size
);
1160 adjust_endianness(mr
, &data
, size
);
1162 if (mr
->ops
->write
) {
1163 access_with_adjusted_size(addr
, &data
, size
,
1164 mr
->ops
->impl
.min_access_size
,
1165 mr
->ops
->impl
.max_access_size
,
1166 memory_region_write_accessor
, mr
);
1168 access_with_adjusted_size(addr
, &data
, size
, 1, 4,
1169 memory_region_oldmmio_write_accessor
, mr
);
1174 void memory_region_init_io(MemoryRegion
*mr
,
1176 const MemoryRegionOps
*ops
,
1181 memory_region_init(mr
, owner
, name
, size
);
1183 mr
->opaque
= opaque
;
1184 mr
->terminates
= true;
1185 mr
->ram_addr
= ~(ram_addr_t
)0;
1188 void memory_region_init_ram(MemoryRegion
*mr
,
1194 memory_region_init(mr
, owner
, name
, size
);
1196 mr
->terminates
= true;
1197 mr
->destructor
= memory_region_destructor_ram
;
1198 mr
->ram_addr
= qemu_ram_alloc(size
, mr
, errp
);
1202 void memory_region_init_ram_from_file(MemoryRegion
*mr
,
1203 struct Object
*owner
,
1210 memory_region_init(mr
, owner
, name
, size
);
1212 mr
->terminates
= true;
1213 mr
->destructor
= memory_region_destructor_ram
;
1214 mr
->ram_addr
= qemu_ram_alloc_from_file(size
, mr
, share
, path
, errp
);
1218 void memory_region_init_ram_ptr(MemoryRegion
*mr
,
1224 memory_region_init(mr
, owner
, name
, size
);
1226 mr
->terminates
= true;
1227 mr
->destructor
= memory_region_destructor_ram_from_ptr
;
1229 /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
1230 assert(ptr
!= NULL
);
1231 mr
->ram_addr
= qemu_ram_alloc_from_ptr(size
, ptr
, mr
, &error_abort
);
1234 void memory_region_set_skip_dump(MemoryRegion
*mr
)
1236 mr
->skip_dump
= true;
1239 void memory_region_init_alias(MemoryRegion
*mr
,
1246 memory_region_init(mr
, owner
, name
, size
);
1247 memory_region_ref(orig
);
1248 mr
->destructor
= memory_region_destructor_alias
;
1250 mr
->alias_offset
= offset
;
1253 void memory_region_init_rom_device(MemoryRegion
*mr
,
1255 const MemoryRegionOps
*ops
,
1261 memory_region_init(mr
, owner
, name
, size
);
1263 mr
->opaque
= opaque
;
1264 mr
->terminates
= true;
1265 mr
->rom_device
= true;
1266 mr
->destructor
= memory_region_destructor_rom_device
;
1267 mr
->ram_addr
= qemu_ram_alloc(size
, mr
, errp
);
1270 void memory_region_init_iommu(MemoryRegion
*mr
,
1272 const MemoryRegionIOMMUOps
*ops
,
1276 memory_region_init(mr
, owner
, name
, size
);
1277 mr
->iommu_ops
= ops
,
1278 mr
->terminates
= true; /* then re-forwards */
1279 notifier_list_init(&mr
->iommu_notify
);
1282 void memory_region_init_reservation(MemoryRegion
*mr
,
1287 memory_region_init_io(mr
, owner
, &unassigned_mem_ops
, mr
, name
, size
);
1290 static void memory_region_finalize(Object
*obj
)
1292 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1294 assert(QTAILQ_EMPTY(&mr
->subregions
));
1295 assert(memory_region_transaction_depth
== 0);
1297 memory_region_clear_coalescing(mr
);
1298 g_free((char *)mr
->name
);
1299 g_free(mr
->ioeventfds
);
1302 Object
*memory_region_owner(MemoryRegion
*mr
)
1304 Object
*obj
= OBJECT(mr
);
1308 void memory_region_ref(MemoryRegion
*mr
)
1310 /* MMIO callbacks most likely will access data that belongs
1311 * to the owner, hence the need to ref/unref the owner whenever
1312 * the memory region is in use.
1314 * The memory region is a child of its owner. As long as the
1315 * owner doesn't call unparent itself on the memory region,
1316 * ref-ing the owner will also keep the memory region alive.
1317 * Memory regions without an owner are supposed to never go away,
1318 * but we still ref/unref them for debugging purposes.
1320 Object
*obj
= OBJECT(mr
);
1321 if (obj
&& obj
->parent
) {
1322 object_ref(obj
->parent
);
1328 void memory_region_unref(MemoryRegion
*mr
)
1330 Object
*obj
= OBJECT(mr
);
1331 if (obj
&& obj
->parent
) {
1332 object_unref(obj
->parent
);
1338 uint64_t memory_region_size(MemoryRegion
*mr
)
1340 if (int128_eq(mr
->size
, int128_2_64())) {
1343 return int128_get64(mr
->size
);
1346 const char *memory_region_name(const MemoryRegion
*mr
)
1349 ((MemoryRegion
*)mr
)->name
=
1350 object_get_canonical_path_component(OBJECT(mr
));
1355 bool memory_region_is_ram(MemoryRegion
*mr
)
1360 bool memory_region_is_skip_dump(MemoryRegion
*mr
)
1362 return mr
->skip_dump
;
1365 bool memory_region_is_logging(MemoryRegion
*mr
)
1367 return mr
->dirty_log_mask
;
1370 bool memory_region_is_rom(MemoryRegion
*mr
)
1372 return mr
->ram
&& mr
->readonly
;
1375 bool memory_region_is_iommu(MemoryRegion
*mr
)
1377 return mr
->iommu_ops
;
1380 void memory_region_register_iommu_notifier(MemoryRegion
*mr
, Notifier
*n
)
1382 notifier_list_add(&mr
->iommu_notify
, n
);
1385 void memory_region_unregister_iommu_notifier(Notifier
*n
)
1390 void memory_region_notify_iommu(MemoryRegion
*mr
,
1391 IOMMUTLBEntry entry
)
1393 assert(memory_region_is_iommu(mr
));
1394 notifier_list_notify(&mr
->iommu_notify
, &entry
);
1397 void memory_region_set_log(MemoryRegion
*mr
, bool log
, unsigned client
)
1399 uint8_t mask
= 1 << client
;
1401 memory_region_transaction_begin();
1402 mr
->dirty_log_mask
= (mr
->dirty_log_mask
& ~mask
) | (log
* mask
);
1403 memory_region_update_pending
|= mr
->enabled
;
1404 memory_region_transaction_commit();
1407 bool memory_region_get_dirty(MemoryRegion
*mr
, hwaddr addr
,
1408 hwaddr size
, unsigned client
)
1410 assert(mr
->terminates
);
1411 return cpu_physical_memory_get_dirty(mr
->ram_addr
+ addr
, size
, client
);
1414 void memory_region_set_dirty(MemoryRegion
*mr
, hwaddr addr
,
1417 assert(mr
->terminates
);
1418 cpu_physical_memory_set_dirty_range(mr
->ram_addr
+ addr
, size
);
1421 bool memory_region_test_and_clear_dirty(MemoryRegion
*mr
, hwaddr addr
,
1422 hwaddr size
, unsigned client
)
1425 assert(mr
->terminates
);
1426 ret
= cpu_physical_memory_get_dirty(mr
->ram_addr
+ addr
, size
, client
);
1428 cpu_physical_memory_reset_dirty(mr
->ram_addr
+ addr
, size
, client
);
1434 void memory_region_sync_dirty_bitmap(MemoryRegion
*mr
)
1439 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1440 FlatView
*view
= address_space_get_flatview(as
);
1441 FOR_EACH_FLAT_RANGE(fr
, view
) {
1443 MEMORY_LISTENER_UPDATE_REGION(fr
, as
, Forward
, log_sync
);
1446 flatview_unref(view
);
1450 void memory_region_set_readonly(MemoryRegion
*mr
, bool readonly
)
1452 if (mr
->readonly
!= readonly
) {
1453 memory_region_transaction_begin();
1454 mr
->readonly
= readonly
;
1455 memory_region_update_pending
|= mr
->enabled
;
1456 memory_region_transaction_commit();
1460 void memory_region_rom_device_set_romd(MemoryRegion
*mr
, bool romd_mode
)
1462 if (mr
->romd_mode
!= romd_mode
) {
1463 memory_region_transaction_begin();
1464 mr
->romd_mode
= romd_mode
;
1465 memory_region_update_pending
|= mr
->enabled
;
1466 memory_region_transaction_commit();
1470 void memory_region_reset_dirty(MemoryRegion
*mr
, hwaddr addr
,
1471 hwaddr size
, unsigned client
)
1473 assert(mr
->terminates
);
1474 cpu_physical_memory_reset_dirty(mr
->ram_addr
+ addr
, size
, client
);
1477 int memory_region_get_fd(MemoryRegion
*mr
)
1480 return memory_region_get_fd(mr
->alias
);
1483 assert(mr
->terminates
);
1485 return qemu_get_ram_fd(mr
->ram_addr
& TARGET_PAGE_MASK
);
1488 void *memory_region_get_ram_ptr(MemoryRegion
*mr
)
1491 return memory_region_get_ram_ptr(mr
->alias
) + mr
->alias_offset
;
1494 assert(mr
->terminates
);
1496 return qemu_get_ram_ptr(mr
->ram_addr
& TARGET_PAGE_MASK
);
1499 static void memory_region_update_coalesced_range_as(MemoryRegion
*mr
, AddressSpace
*as
)
1503 CoalescedMemoryRange
*cmr
;
1505 MemoryRegionSection section
;
1507 view
= address_space_get_flatview(as
);
1508 FOR_EACH_FLAT_RANGE(fr
, view
) {
1510 section
= (MemoryRegionSection
) {
1511 .address_space
= as
,
1512 .offset_within_address_space
= int128_get64(fr
->addr
.start
),
1513 .size
= fr
->addr
.size
,
1516 MEMORY_LISTENER_CALL(coalesced_mmio_del
, Reverse
, §ion
,
1517 int128_get64(fr
->addr
.start
),
1518 int128_get64(fr
->addr
.size
));
1519 QTAILQ_FOREACH(cmr
, &mr
->coalesced
, link
) {
1520 tmp
= addrrange_shift(cmr
->addr
,
1521 int128_sub(fr
->addr
.start
,
1522 int128_make64(fr
->offset_in_region
)));
1523 if (!addrrange_intersects(tmp
, fr
->addr
)) {
1526 tmp
= addrrange_intersection(tmp
, fr
->addr
);
1527 MEMORY_LISTENER_CALL(coalesced_mmio_add
, Forward
, §ion
,
1528 int128_get64(tmp
.start
),
1529 int128_get64(tmp
.size
));
1533 flatview_unref(view
);
1536 static void memory_region_update_coalesced_range(MemoryRegion
*mr
)
1540 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1541 memory_region_update_coalesced_range_as(mr
, as
);
1545 void memory_region_set_coalescing(MemoryRegion
*mr
)
1547 memory_region_clear_coalescing(mr
);
1548 memory_region_add_coalescing(mr
, 0, int128_get64(mr
->size
));
1551 void memory_region_add_coalescing(MemoryRegion
*mr
,
1555 CoalescedMemoryRange
*cmr
= g_malloc(sizeof(*cmr
));
1557 cmr
->addr
= addrrange_make(int128_make64(offset
), int128_make64(size
));
1558 QTAILQ_INSERT_TAIL(&mr
->coalesced
, cmr
, link
);
1559 memory_region_update_coalesced_range(mr
);
1560 memory_region_set_flush_coalesced(mr
);
1563 void memory_region_clear_coalescing(MemoryRegion
*mr
)
1565 CoalescedMemoryRange
*cmr
;
1566 bool updated
= false;
1568 qemu_flush_coalesced_mmio_buffer();
1569 mr
->flush_coalesced_mmio
= false;
1571 while (!QTAILQ_EMPTY(&mr
->coalesced
)) {
1572 cmr
= QTAILQ_FIRST(&mr
->coalesced
);
1573 QTAILQ_REMOVE(&mr
->coalesced
, cmr
, link
);
1579 memory_region_update_coalesced_range(mr
);
1583 void memory_region_set_flush_coalesced(MemoryRegion
*mr
)
1585 mr
->flush_coalesced_mmio
= true;
1588 void memory_region_clear_flush_coalesced(MemoryRegion
*mr
)
1590 qemu_flush_coalesced_mmio_buffer();
1591 if (QTAILQ_EMPTY(&mr
->coalesced
)) {
1592 mr
->flush_coalesced_mmio
= false;
1596 void memory_region_add_eventfd(MemoryRegion
*mr
,
1603 MemoryRegionIoeventfd mrfd
= {
1604 .addr
.start
= int128_make64(addr
),
1605 .addr
.size
= int128_make64(size
),
1606 .match_data
= match_data
,
1612 adjust_endianness(mr
, &mrfd
.data
, size
);
1613 memory_region_transaction_begin();
1614 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
1615 if (memory_region_ioeventfd_before(mrfd
, mr
->ioeventfds
[i
])) {
1620 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
1621 sizeof(*mr
->ioeventfds
) * mr
->ioeventfd_nb
);
1622 memmove(&mr
->ioeventfds
[i
+1], &mr
->ioeventfds
[i
],
1623 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
-1 - i
));
1624 mr
->ioeventfds
[i
] = mrfd
;
1625 ioeventfd_update_pending
|= mr
->enabled
;
1626 memory_region_transaction_commit();
1629 void memory_region_del_eventfd(MemoryRegion
*mr
,
1636 MemoryRegionIoeventfd mrfd
= {
1637 .addr
.start
= int128_make64(addr
),
1638 .addr
.size
= int128_make64(size
),
1639 .match_data
= match_data
,
1645 adjust_endianness(mr
, &mrfd
.data
, size
);
1646 memory_region_transaction_begin();
1647 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
1648 if (memory_region_ioeventfd_equal(mrfd
, mr
->ioeventfds
[i
])) {
1652 assert(i
!= mr
->ioeventfd_nb
);
1653 memmove(&mr
->ioeventfds
[i
], &mr
->ioeventfds
[i
+1],
1654 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
- (i
+1)));
1656 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
1657 sizeof(*mr
->ioeventfds
)*mr
->ioeventfd_nb
+ 1);
1658 ioeventfd_update_pending
|= mr
->enabled
;
1659 memory_region_transaction_commit();
1662 static void memory_region_update_container_subregions(MemoryRegion
*subregion
)
1664 hwaddr offset
= subregion
->addr
;
1665 MemoryRegion
*mr
= subregion
->container
;
1666 MemoryRegion
*other
;
1668 memory_region_transaction_begin();
1670 memory_region_ref(subregion
);
1671 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
1672 if (subregion
->may_overlap
|| other
->may_overlap
) {
1675 if (int128_ge(int128_make64(offset
),
1676 int128_add(int128_make64(other
->addr
), other
->size
))
1677 || int128_le(int128_add(int128_make64(offset
), subregion
->size
),
1678 int128_make64(other
->addr
))) {
1682 printf("warning: subregion collision %llx/%llx (%s) "
1683 "vs %llx/%llx (%s)\n",
1684 (unsigned long long)offset
,
1685 (unsigned long long)int128_get64(subregion
->size
),
1687 (unsigned long long)other
->addr
,
1688 (unsigned long long)int128_get64(other
->size
),
1692 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
1693 if (subregion
->priority
>= other
->priority
) {
1694 QTAILQ_INSERT_BEFORE(other
, subregion
, subregions_link
);
1698 QTAILQ_INSERT_TAIL(&mr
->subregions
, subregion
, subregions_link
);
1700 memory_region_update_pending
|= mr
->enabled
&& subregion
->enabled
;
1701 memory_region_transaction_commit();
1704 static void memory_region_add_subregion_common(MemoryRegion
*mr
,
1706 MemoryRegion
*subregion
)
1708 assert(!subregion
->container
);
1709 subregion
->container
= mr
;
1710 subregion
->addr
= offset
;
1711 memory_region_update_container_subregions(subregion
);
1714 void memory_region_add_subregion(MemoryRegion
*mr
,
1716 MemoryRegion
*subregion
)
1718 subregion
->may_overlap
= false;
1719 subregion
->priority
= 0;
1720 memory_region_add_subregion_common(mr
, offset
, subregion
);
1723 void memory_region_add_subregion_overlap(MemoryRegion
*mr
,
1725 MemoryRegion
*subregion
,
1728 subregion
->may_overlap
= true;
1729 subregion
->priority
= priority
;
1730 memory_region_add_subregion_common(mr
, offset
, subregion
);
1733 void memory_region_del_subregion(MemoryRegion
*mr
,
1734 MemoryRegion
*subregion
)
1736 memory_region_transaction_begin();
1737 assert(subregion
->container
== mr
);
1738 subregion
->container
= NULL
;
1739 QTAILQ_REMOVE(&mr
->subregions
, subregion
, subregions_link
);
1740 memory_region_unref(subregion
);
1741 memory_region_update_pending
|= mr
->enabled
&& subregion
->enabled
;
1742 memory_region_transaction_commit();
1745 void memory_region_set_enabled(MemoryRegion
*mr
, bool enabled
)
1747 if (enabled
== mr
->enabled
) {
1750 memory_region_transaction_begin();
1751 mr
->enabled
= enabled
;
1752 memory_region_update_pending
= true;
1753 memory_region_transaction_commit();
1756 static void memory_region_readd_subregion(MemoryRegion
*mr
)
1758 MemoryRegion
*container
= mr
->container
;
1761 memory_region_transaction_begin();
1762 memory_region_ref(mr
);
1763 memory_region_del_subregion(container
, mr
);
1764 mr
->container
= container
;
1765 memory_region_update_container_subregions(mr
);
1766 memory_region_unref(mr
);
1767 memory_region_transaction_commit();
1771 void memory_region_set_address(MemoryRegion
*mr
, hwaddr addr
)
1773 if (addr
!= mr
->addr
) {
1775 memory_region_readd_subregion(mr
);
1779 void memory_region_set_alias_offset(MemoryRegion
*mr
, hwaddr offset
)
1783 if (offset
== mr
->alias_offset
) {
1787 memory_region_transaction_begin();
1788 mr
->alias_offset
= offset
;
1789 memory_region_update_pending
|= mr
->enabled
;
1790 memory_region_transaction_commit();
1793 ram_addr_t
memory_region_get_ram_addr(MemoryRegion
*mr
)
1795 return mr
->ram_addr
;
1798 uint64_t memory_region_get_alignment(const MemoryRegion
*mr
)
1803 static int cmp_flatrange_addr(const void *addr_
, const void *fr_
)
1805 const AddrRange
*addr
= addr_
;
1806 const FlatRange
*fr
= fr_
;
1808 if (int128_le(addrrange_end(*addr
), fr
->addr
.start
)) {
1810 } else if (int128_ge(addr
->start
, addrrange_end(fr
->addr
))) {
1816 static FlatRange
*flatview_lookup(FlatView
*view
, AddrRange addr
)
1818 return bsearch(&addr
, view
->ranges
, view
->nr
,
1819 sizeof(FlatRange
), cmp_flatrange_addr
);
1822 bool memory_region_present(MemoryRegion
*container
, hwaddr addr
)
1824 MemoryRegion
*mr
= memory_region_find(container
, addr
, 1).mr
;
1825 if (!mr
|| (mr
== container
)) {
1828 memory_region_unref(mr
);
1832 bool memory_region_is_mapped(MemoryRegion
*mr
)
1834 return mr
->container
? true : false;
1837 MemoryRegionSection
memory_region_find(MemoryRegion
*mr
,
1838 hwaddr addr
, uint64_t size
)
1840 MemoryRegionSection ret
= { .mr
= NULL
};
1848 for (root
= mr
; root
->container
; ) {
1849 root
= root
->container
;
1853 as
= memory_region_to_address_space(root
);
1857 range
= addrrange_make(int128_make64(addr
), int128_make64(size
));
1859 view
= address_space_get_flatview(as
);
1860 fr
= flatview_lookup(view
, range
);
1862 flatview_unref(view
);
1866 while (fr
> view
->ranges
&& addrrange_intersects(fr
[-1].addr
, range
)) {
1871 ret
.address_space
= as
;
1872 range
= addrrange_intersection(range
, fr
->addr
);
1873 ret
.offset_within_region
= fr
->offset_in_region
;
1874 ret
.offset_within_region
+= int128_get64(int128_sub(range
.start
,
1876 ret
.size
= range
.size
;
1877 ret
.offset_within_address_space
= int128_get64(range
.start
);
1878 ret
.readonly
= fr
->readonly
;
1879 memory_region_ref(ret
.mr
);
1881 flatview_unref(view
);
1885 void address_space_sync_dirty_bitmap(AddressSpace
*as
)
1890 view
= address_space_get_flatview(as
);
1891 FOR_EACH_FLAT_RANGE(fr
, view
) {
1892 MEMORY_LISTENER_UPDATE_REGION(fr
, as
, Forward
, log_sync
);
1894 flatview_unref(view
);
1897 void memory_global_dirty_log_start(void)
1899 global_dirty_log
= true;
1900 MEMORY_LISTENER_CALL_GLOBAL(log_global_start
, Forward
);
1903 void memory_global_dirty_log_stop(void)
1905 global_dirty_log
= false;
1906 MEMORY_LISTENER_CALL_GLOBAL(log_global_stop
, Reverse
);
1909 static void listener_add_address_space(MemoryListener
*listener
,
1915 if (listener
->address_space_filter
1916 && listener
->address_space_filter
!= as
) {
1920 if (global_dirty_log
) {
1921 if (listener
->log_global_start
) {
1922 listener
->log_global_start(listener
);
1926 view
= address_space_get_flatview(as
);
1927 FOR_EACH_FLAT_RANGE(fr
, view
) {
1928 MemoryRegionSection section
= {
1930 .address_space
= as
,
1931 .offset_within_region
= fr
->offset_in_region
,
1932 .size
= fr
->addr
.size
,
1933 .offset_within_address_space
= int128_get64(fr
->addr
.start
),
1934 .readonly
= fr
->readonly
,
1936 if (listener
->region_add
) {
1937 listener
->region_add(listener
, §ion
);
1940 flatview_unref(view
);
1943 void memory_listener_register(MemoryListener
*listener
, AddressSpace
*filter
)
1945 MemoryListener
*other
= NULL
;
1948 listener
->address_space_filter
= filter
;
1949 if (QTAILQ_EMPTY(&memory_listeners
)
1950 || listener
->priority
>= QTAILQ_LAST(&memory_listeners
,
1951 memory_listeners
)->priority
) {
1952 QTAILQ_INSERT_TAIL(&memory_listeners
, listener
, link
);
1954 QTAILQ_FOREACH(other
, &memory_listeners
, link
) {
1955 if (listener
->priority
< other
->priority
) {
1959 QTAILQ_INSERT_BEFORE(other
, listener
, link
);
1962 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1963 listener_add_address_space(listener
, as
);
1967 void memory_listener_unregister(MemoryListener
*listener
)
1969 QTAILQ_REMOVE(&memory_listeners
, listener
, link
);
1972 void address_space_init(AddressSpace
*as
, MemoryRegion
*root
, const char *name
)
1974 if (QTAILQ_EMPTY(&address_spaces
)) {
1978 memory_region_transaction_begin();
1980 as
->current_map
= g_new(FlatView
, 1);
1981 flatview_init(as
->current_map
);
1982 as
->ioeventfd_nb
= 0;
1983 as
->ioeventfds
= NULL
;
1984 QTAILQ_INSERT_TAIL(&address_spaces
, as
, address_spaces_link
);
1985 as
->name
= g_strdup(name
? name
: "anonymous");
1986 address_space_init_dispatch(as
);
1987 memory_region_update_pending
|= root
->enabled
;
1988 memory_region_transaction_commit();
1991 void address_space_destroy(AddressSpace
*as
)
1993 MemoryListener
*listener
;
1995 /* Flush out anything from MemoryListeners listening in on this */
1996 memory_region_transaction_begin();
1998 memory_region_transaction_commit();
1999 QTAILQ_REMOVE(&address_spaces
, as
, address_spaces_link
);
2000 address_space_destroy_dispatch(as
);
2002 QTAILQ_FOREACH(listener
, &memory_listeners
, link
) {
2003 assert(listener
->address_space_filter
!= as
);
2006 flatview_unref(as
->current_map
);
2008 g_free(as
->ioeventfds
);
2011 bool io_mem_read(MemoryRegion
*mr
, hwaddr addr
, uint64_t *pval
, unsigned size
)
2013 return memory_region_dispatch_read(mr
, addr
, pval
, size
);
2016 bool io_mem_write(MemoryRegion
*mr
, hwaddr addr
,
2017 uint64_t val
, unsigned size
)
2019 return memory_region_dispatch_write(mr
, addr
, val
, size
);
2022 typedef struct MemoryRegionList MemoryRegionList
;
2024 struct MemoryRegionList
{
2025 const MemoryRegion
*mr
;
2026 QTAILQ_ENTRY(MemoryRegionList
) queue
;
2029 typedef QTAILQ_HEAD(queue
, MemoryRegionList
) MemoryRegionListHead
;
2031 static void mtree_print_mr(fprintf_function mon_printf
, void *f
,
2032 const MemoryRegion
*mr
, unsigned int level
,
2034 MemoryRegionListHead
*alias_print_queue
)
2036 MemoryRegionList
*new_ml
, *ml
, *next_ml
;
2037 MemoryRegionListHead submr_print_queue
;
2038 const MemoryRegion
*submr
;
2041 if (!mr
|| !mr
->enabled
) {
2045 for (i
= 0; i
< level
; i
++) {
2050 MemoryRegionList
*ml
;
2053 /* check if the alias is already in the queue */
2054 QTAILQ_FOREACH(ml
, alias_print_queue
, queue
) {
2055 if (ml
->mr
== mr
->alias
) {
2061 ml
= g_new(MemoryRegionList
, 1);
2063 QTAILQ_INSERT_TAIL(alias_print_queue
, ml
, queue
);
2065 mon_printf(f
, TARGET_FMT_plx
"-" TARGET_FMT_plx
2066 " (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx
2067 "-" TARGET_FMT_plx
"\n",
2070 + (int128_nz(mr
->size
) ?
2071 (hwaddr
)int128_get64(int128_sub(mr
->size
,
2072 int128_one())) : 0),
2074 mr
->romd_mode
? 'R' : '-',
2075 !mr
->readonly
&& !(mr
->rom_device
&& mr
->romd_mode
) ? 'W'
2077 memory_region_name(mr
),
2078 memory_region_name(mr
->alias
),
2081 + (int128_nz(mr
->size
) ?
2082 (hwaddr
)int128_get64(int128_sub(mr
->size
,
2083 int128_one())) : 0));
2086 TARGET_FMT_plx
"-" TARGET_FMT_plx
" (prio %d, %c%c): %s\n",
2089 + (int128_nz(mr
->size
) ?
2090 (hwaddr
)int128_get64(int128_sub(mr
->size
,
2091 int128_one())) : 0),
2093 mr
->romd_mode
? 'R' : '-',
2094 !mr
->readonly
&& !(mr
->rom_device
&& mr
->romd_mode
) ? 'W'
2096 memory_region_name(mr
));
2099 QTAILQ_INIT(&submr_print_queue
);
2101 QTAILQ_FOREACH(submr
, &mr
->subregions
, subregions_link
) {
2102 new_ml
= g_new(MemoryRegionList
, 1);
2104 QTAILQ_FOREACH(ml
, &submr_print_queue
, queue
) {
2105 if (new_ml
->mr
->addr
< ml
->mr
->addr
||
2106 (new_ml
->mr
->addr
== ml
->mr
->addr
&&
2107 new_ml
->mr
->priority
> ml
->mr
->priority
)) {
2108 QTAILQ_INSERT_BEFORE(ml
, new_ml
, queue
);
2114 QTAILQ_INSERT_TAIL(&submr_print_queue
, new_ml
, queue
);
2118 QTAILQ_FOREACH(ml
, &submr_print_queue
, queue
) {
2119 mtree_print_mr(mon_printf
, f
, ml
->mr
, level
+ 1, base
+ mr
->addr
,
2123 QTAILQ_FOREACH_SAFE(ml
, &submr_print_queue
, queue
, next_ml
) {
2128 void mtree_info(fprintf_function mon_printf
, void *f
)
2130 MemoryRegionListHead ml_head
;
2131 MemoryRegionList
*ml
, *ml2
;
2134 QTAILQ_INIT(&ml_head
);
2136 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
2137 mon_printf(f
, "%s\n", as
->name
);
2138 mtree_print_mr(mon_printf
, f
, as
->root
, 0, 0, &ml_head
);
2141 mon_printf(f
, "aliases\n");
2142 /* print aliased regions */
2143 QTAILQ_FOREACH(ml
, &ml_head
, queue
) {
2144 mon_printf(f
, "%s\n", memory_region_name(ml
->mr
));
2145 mtree_print_mr(mon_printf
, f
, ml
->mr
, 0, 0, &ml_head
);
2148 QTAILQ_FOREACH_SAFE(ml
, &ml_head
, queue
, ml2
) {
2153 static const TypeInfo memory_region_info
= {
2154 .parent
= TYPE_OBJECT
,
2155 .name
= TYPE_MEMORY_REGION
,
2156 .instance_size
= sizeof(MemoryRegion
),
2157 .instance_init
= memory_region_initfn
,
2158 .instance_finalize
= memory_region_finalize
,
2161 static void memory_register_types(void)
2163 type_register_static(&memory_region_info
);
2166 type_init(memory_register_types
)