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 using signed integers limits us to physical addresses at most
58 * 63 bits wide. They are needed for negative offsetting in aliases
59 * (large MemoryRegion::alias_offset).
66 static AddrRange
addrrange_make(Int128 start
, Int128 size
)
68 return (AddrRange
) { start
, size
};
71 static bool addrrange_equal(AddrRange r1
, AddrRange r2
)
73 return int128_eq(r1
.start
, r2
.start
) && int128_eq(r1
.size
, r2
.size
);
76 static Int128
addrrange_end(AddrRange r
)
78 return int128_add(r
.start
, r
.size
);
81 static AddrRange
addrrange_shift(AddrRange range
, Int128 delta
)
83 int128_addto(&range
.start
, delta
);
87 static bool addrrange_contains(AddrRange range
, Int128 addr
)
89 return int128_ge(addr
, range
.start
)
90 && int128_lt(addr
, addrrange_end(range
));
93 static bool addrrange_intersects(AddrRange r1
, AddrRange r2
)
95 return addrrange_contains(r1
, r2
.start
)
96 || addrrange_contains(r2
, r1
.start
);
99 static AddrRange
addrrange_intersection(AddrRange r1
, AddrRange r2
)
101 Int128 start
= int128_max(r1
.start
, r2
.start
);
102 Int128 end
= int128_min(addrrange_end(r1
), addrrange_end(r2
));
103 return addrrange_make(start
, int128_sub(end
, start
));
106 enum ListenerDirection
{ Forward
, Reverse
};
108 static bool memory_listener_match(MemoryListener
*listener
,
109 MemoryRegionSection
*section
)
111 return !listener
->address_space_filter
112 || listener
->address_space_filter
== section
->address_space
;
115 #define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
117 MemoryListener *_listener; \
119 switch (_direction) { \
121 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
122 if (_listener->_callback) { \
123 _listener->_callback(_listener, ##_args); \
128 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
129 memory_listeners, link) { \
130 if (_listener->_callback) { \
131 _listener->_callback(_listener, ##_args); \
140 #define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \
142 MemoryListener *_listener; \
144 switch (_direction) { \
146 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
147 if (_listener->_callback \
148 && memory_listener_match(_listener, _section)) { \
149 _listener->_callback(_listener, _section, ##_args); \
154 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
155 memory_listeners, link) { \
156 if (_listener->_callback \
157 && memory_listener_match(_listener, _section)) { \
158 _listener->_callback(_listener, _section, ##_args); \
167 /* No need to ref/unref .mr, the FlatRange keeps it alive. */
168 #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \
169 MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \
171 .address_space = (as), \
172 .offset_within_region = (fr)->offset_in_region, \
173 .size = (fr)->addr.size, \
174 .offset_within_address_space = int128_get64((fr)->addr.start), \
175 .readonly = (fr)->readonly, \
178 struct CoalescedMemoryRange
{
180 QTAILQ_ENTRY(CoalescedMemoryRange
) link
;
183 struct MemoryRegionIoeventfd
{
190 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a
,
191 MemoryRegionIoeventfd b
)
193 if (int128_lt(a
.addr
.start
, b
.addr
.start
)) {
195 } else if (int128_gt(a
.addr
.start
, b
.addr
.start
)) {
197 } else if (int128_lt(a
.addr
.size
, b
.addr
.size
)) {
199 } else if (int128_gt(a
.addr
.size
, b
.addr
.size
)) {
201 } else if (a
.match_data
< b
.match_data
) {
203 } else if (a
.match_data
> b
.match_data
) {
205 } else if (a
.match_data
) {
206 if (a
.data
< b
.data
) {
208 } else if (a
.data
> b
.data
) {
214 } else if (a
.e
> b
.e
) {
220 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a
,
221 MemoryRegionIoeventfd b
)
223 return !memory_region_ioeventfd_before(a
, b
)
224 && !memory_region_ioeventfd_before(b
, a
);
227 typedef struct FlatRange FlatRange
;
228 typedef struct FlatView FlatView
;
230 /* Range of memory in the global map. Addresses are absolute. */
233 hwaddr offset_in_region
;
235 uint8_t dirty_log_mask
;
240 /* Flattened global view of current active memory hierarchy. Kept in sorted
247 unsigned nr_allocated
;
250 typedef struct AddressSpaceOps AddressSpaceOps
;
252 #define FOR_EACH_FLAT_RANGE(var, view) \
253 for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
255 static bool flatrange_equal(FlatRange
*a
, FlatRange
*b
)
257 return a
->mr
== b
->mr
258 && addrrange_equal(a
->addr
, b
->addr
)
259 && a
->offset_in_region
== b
->offset_in_region
260 && a
->romd_mode
== b
->romd_mode
261 && a
->readonly
== b
->readonly
;
264 static void flatview_init(FlatView
*view
)
269 view
->nr_allocated
= 0;
272 /* Insert a range into a given position. Caller is responsible for maintaining
275 static void flatview_insert(FlatView
*view
, unsigned pos
, FlatRange
*range
)
277 if (view
->nr
== view
->nr_allocated
) {
278 view
->nr_allocated
= MAX(2 * view
->nr
, 10);
279 view
->ranges
= g_realloc(view
->ranges
,
280 view
->nr_allocated
* sizeof(*view
->ranges
));
282 memmove(view
->ranges
+ pos
+ 1, view
->ranges
+ pos
,
283 (view
->nr
- pos
) * sizeof(FlatRange
));
284 view
->ranges
[pos
] = *range
;
285 memory_region_ref(range
->mr
);
289 static void flatview_destroy(FlatView
*view
)
293 for (i
= 0; i
< view
->nr
; i
++) {
294 memory_region_unref(view
->ranges
[i
].mr
);
296 g_free(view
->ranges
);
300 static void flatview_ref(FlatView
*view
)
302 atomic_inc(&view
->ref
);
305 static void flatview_unref(FlatView
*view
)
307 if (atomic_fetch_dec(&view
->ref
) == 1) {
308 flatview_destroy(view
);
312 static bool can_merge(FlatRange
*r1
, FlatRange
*r2
)
314 return int128_eq(addrrange_end(r1
->addr
), r2
->addr
.start
)
316 && int128_eq(int128_add(int128_make64(r1
->offset_in_region
),
318 int128_make64(r2
->offset_in_region
))
319 && r1
->dirty_log_mask
== r2
->dirty_log_mask
320 && r1
->romd_mode
== r2
->romd_mode
321 && r1
->readonly
== r2
->readonly
;
324 /* Attempt to simplify a view by merging adjacent ranges */
325 static void flatview_simplify(FlatView
*view
)
330 while (i
< view
->nr
) {
333 && can_merge(&view
->ranges
[j
-1], &view
->ranges
[j
])) {
334 int128_addto(&view
->ranges
[i
].addr
.size
, view
->ranges
[j
].addr
.size
);
338 memmove(&view
->ranges
[i
], &view
->ranges
[j
],
339 (view
->nr
- j
) * sizeof(view
->ranges
[j
]));
344 static bool memory_region_big_endian(MemoryRegion
*mr
)
346 #ifdef TARGET_WORDS_BIGENDIAN
347 return mr
->ops
->endianness
!= DEVICE_LITTLE_ENDIAN
;
349 return mr
->ops
->endianness
== DEVICE_BIG_ENDIAN
;
353 static bool memory_region_wrong_endianness(MemoryRegion
*mr
)
355 #ifdef TARGET_WORDS_BIGENDIAN
356 return mr
->ops
->endianness
== DEVICE_LITTLE_ENDIAN
;
358 return mr
->ops
->endianness
== DEVICE_BIG_ENDIAN
;
362 static void adjust_endianness(MemoryRegion
*mr
, uint64_t *data
, unsigned size
)
364 if (memory_region_wrong_endianness(mr
)) {
369 *data
= bswap16(*data
);
372 *data
= bswap32(*data
);
375 *data
= bswap64(*data
);
383 static void memory_region_oldmmio_read_accessor(MemoryRegion
*mr
,
392 tmp
= mr
->ops
->old_mmio
.read
[ctz32(size
)](mr
->opaque
, addr
);
393 trace_memory_region_ops_read(mr
, addr
, tmp
, size
);
394 *value
|= (tmp
& mask
) << shift
;
397 static void memory_region_read_accessor(MemoryRegion
*mr
,
406 if (mr
->flush_coalesced_mmio
) {
407 qemu_flush_coalesced_mmio_buffer();
409 tmp
= mr
->ops
->read(mr
->opaque
, addr
, size
);
410 trace_memory_region_ops_read(mr
, addr
, tmp
, size
);
411 *value
|= (tmp
& mask
) << shift
;
414 static void memory_region_oldmmio_write_accessor(MemoryRegion
*mr
,
423 tmp
= (*value
>> shift
) & mask
;
424 trace_memory_region_ops_write(mr
, addr
, tmp
, size
);
425 mr
->ops
->old_mmio
.write
[ctz32(size
)](mr
->opaque
, addr
, tmp
);
428 static void memory_region_write_accessor(MemoryRegion
*mr
,
437 if (mr
->flush_coalesced_mmio
) {
438 qemu_flush_coalesced_mmio_buffer();
440 tmp
= (*value
>> shift
) & mask
;
441 trace_memory_region_ops_write(mr
, addr
, tmp
, size
);
442 mr
->ops
->write(mr
->opaque
, addr
, tmp
, size
);
445 static void access_with_adjusted_size(hwaddr addr
,
448 unsigned access_size_min
,
449 unsigned access_size_max
,
450 void (*access
)(MemoryRegion
*mr
,
458 uint64_t access_mask
;
459 unsigned access_size
;
462 if (!access_size_min
) {
465 if (!access_size_max
) {
469 /* FIXME: support unaligned access? */
470 access_size
= MAX(MIN(size
, access_size_max
), access_size_min
);
471 access_mask
= -1ULL >> (64 - access_size
* 8);
472 if (memory_region_big_endian(mr
)) {
473 for (i
= 0; i
< size
; i
+= access_size
) {
474 access(mr
, addr
+ i
, value
, access_size
,
475 (size
- access_size
- i
) * 8, access_mask
);
478 for (i
= 0; i
< size
; i
+= access_size
) {
479 access(mr
, addr
+ i
, value
, access_size
, i
* 8, access_mask
);
484 static AddressSpace
*memory_region_to_address_space(MemoryRegion
*mr
)
488 while (mr
->container
) {
491 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
492 if (mr
== as
->root
) {
499 /* Render a memory region into the global view. Ranges in @view obscure
502 static void render_memory_region(FlatView
*view
,
508 MemoryRegion
*subregion
;
510 hwaddr offset_in_region
;
520 int128_addto(&base
, int128_make64(mr
->addr
));
521 readonly
|= mr
->readonly
;
523 tmp
= addrrange_make(base
, mr
->size
);
525 if (!addrrange_intersects(tmp
, clip
)) {
529 clip
= addrrange_intersection(tmp
, clip
);
532 int128_subfrom(&base
, int128_make64(mr
->alias
->addr
));
533 int128_subfrom(&base
, int128_make64(mr
->alias_offset
));
534 render_memory_region(view
, mr
->alias
, base
, clip
, readonly
);
538 /* Render subregions in priority order. */
539 QTAILQ_FOREACH(subregion
, &mr
->subregions
, subregions_link
) {
540 render_memory_region(view
, subregion
, base
, clip
, readonly
);
543 if (!mr
->terminates
) {
547 offset_in_region
= int128_get64(int128_sub(clip
.start
, base
));
552 fr
.dirty_log_mask
= mr
->dirty_log_mask
;
553 fr
.romd_mode
= mr
->romd_mode
;
554 fr
.readonly
= readonly
;
556 /* Render the region itself into any gaps left by the current view. */
557 for (i
= 0; i
< view
->nr
&& int128_nz(remain
); ++i
) {
558 if (int128_ge(base
, addrrange_end(view
->ranges
[i
].addr
))) {
561 if (int128_lt(base
, view
->ranges
[i
].addr
.start
)) {
562 now
= int128_min(remain
,
563 int128_sub(view
->ranges
[i
].addr
.start
, base
));
564 fr
.offset_in_region
= offset_in_region
;
565 fr
.addr
= addrrange_make(base
, now
);
566 flatview_insert(view
, i
, &fr
);
568 int128_addto(&base
, now
);
569 offset_in_region
+= int128_get64(now
);
570 int128_subfrom(&remain
, now
);
572 now
= int128_sub(int128_min(int128_add(base
, remain
),
573 addrrange_end(view
->ranges
[i
].addr
)),
575 int128_addto(&base
, now
);
576 offset_in_region
+= int128_get64(now
);
577 int128_subfrom(&remain
, now
);
579 if (int128_nz(remain
)) {
580 fr
.offset_in_region
= offset_in_region
;
581 fr
.addr
= addrrange_make(base
, remain
);
582 flatview_insert(view
, i
, &fr
);
586 /* Render a memory topology into a list of disjoint absolute ranges. */
587 static FlatView
*generate_memory_topology(MemoryRegion
*mr
)
591 view
= g_new(FlatView
, 1);
595 render_memory_region(view
, mr
, int128_zero(),
596 addrrange_make(int128_zero(), int128_2_64()), false);
598 flatview_simplify(view
);
603 static void address_space_add_del_ioeventfds(AddressSpace
*as
,
604 MemoryRegionIoeventfd
*fds_new
,
606 MemoryRegionIoeventfd
*fds_old
,
610 MemoryRegionIoeventfd
*fd
;
611 MemoryRegionSection section
;
613 /* Generate a symmetric difference of the old and new fd sets, adding
614 * and deleting as necessary.
618 while (iold
< fds_old_nb
|| inew
< fds_new_nb
) {
619 if (iold
< fds_old_nb
620 && (inew
== fds_new_nb
621 || memory_region_ioeventfd_before(fds_old
[iold
],
624 section
= (MemoryRegionSection
) {
626 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
627 .size
= fd
->addr
.size
,
629 MEMORY_LISTENER_CALL(eventfd_del
, Forward
, §ion
,
630 fd
->match_data
, fd
->data
, fd
->e
);
632 } else if (inew
< fds_new_nb
633 && (iold
== fds_old_nb
634 || memory_region_ioeventfd_before(fds_new
[inew
],
637 section
= (MemoryRegionSection
) {
639 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
640 .size
= fd
->addr
.size
,
642 MEMORY_LISTENER_CALL(eventfd_add
, Reverse
, §ion
,
643 fd
->match_data
, fd
->data
, fd
->e
);
652 static FlatView
*address_space_get_flatview(AddressSpace
*as
)
656 qemu_mutex_lock(&flat_view_mutex
);
657 view
= as
->current_map
;
659 qemu_mutex_unlock(&flat_view_mutex
);
663 static void address_space_update_ioeventfds(AddressSpace
*as
)
667 unsigned ioeventfd_nb
= 0;
668 MemoryRegionIoeventfd
*ioeventfds
= NULL
;
672 view
= address_space_get_flatview(as
);
673 FOR_EACH_FLAT_RANGE(fr
, view
) {
674 for (i
= 0; i
< fr
->mr
->ioeventfd_nb
; ++i
) {
675 tmp
= addrrange_shift(fr
->mr
->ioeventfds
[i
].addr
,
676 int128_sub(fr
->addr
.start
,
677 int128_make64(fr
->offset_in_region
)));
678 if (addrrange_intersects(fr
->addr
, tmp
)) {
680 ioeventfds
= g_realloc(ioeventfds
,
681 ioeventfd_nb
* sizeof(*ioeventfds
));
682 ioeventfds
[ioeventfd_nb
-1] = fr
->mr
->ioeventfds
[i
];
683 ioeventfds
[ioeventfd_nb
-1].addr
= tmp
;
688 address_space_add_del_ioeventfds(as
, ioeventfds
, ioeventfd_nb
,
689 as
->ioeventfds
, as
->ioeventfd_nb
);
691 g_free(as
->ioeventfds
);
692 as
->ioeventfds
= ioeventfds
;
693 as
->ioeventfd_nb
= ioeventfd_nb
;
694 flatview_unref(view
);
697 static void address_space_update_topology_pass(AddressSpace
*as
,
698 const FlatView
*old_view
,
699 const FlatView
*new_view
,
703 FlatRange
*frold
, *frnew
;
705 /* Generate a symmetric difference of the old and new memory maps.
706 * Kill ranges in the old map, and instantiate ranges in the new map.
709 while (iold
< old_view
->nr
|| inew
< new_view
->nr
) {
710 if (iold
< old_view
->nr
) {
711 frold
= &old_view
->ranges
[iold
];
715 if (inew
< new_view
->nr
) {
716 frnew
= &new_view
->ranges
[inew
];
723 || int128_lt(frold
->addr
.start
, frnew
->addr
.start
)
724 || (int128_eq(frold
->addr
.start
, frnew
->addr
.start
)
725 && !flatrange_equal(frold
, frnew
)))) {
726 /* In old but not in new, or in both but attributes changed. */
729 MEMORY_LISTENER_UPDATE_REGION(frold
, as
, Reverse
, region_del
);
733 } else if (frold
&& frnew
&& flatrange_equal(frold
, frnew
)) {
734 /* In both and unchanged (except logging may have changed) */
737 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_nop
);
738 if (frold
->dirty_log_mask
&& !frnew
->dirty_log_mask
) {
739 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Reverse
, log_stop
);
740 } else if (frnew
->dirty_log_mask
&& !frold
->dirty_log_mask
) {
741 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, log_start
);
751 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_add
);
760 static void address_space_update_topology(AddressSpace
*as
)
762 FlatView
*old_view
= address_space_get_flatview(as
);
763 FlatView
*new_view
= generate_memory_topology(as
->root
);
765 address_space_update_topology_pass(as
, old_view
, new_view
, false);
766 address_space_update_topology_pass(as
, old_view
, new_view
, true);
768 qemu_mutex_lock(&flat_view_mutex
);
769 flatview_unref(as
->current_map
);
770 as
->current_map
= new_view
;
771 qemu_mutex_unlock(&flat_view_mutex
);
773 /* Note that all the old MemoryRegions are still alive up to this
774 * point. This relieves most MemoryListeners from the need to
775 * ref/unref the MemoryRegions they get---unless they use them
776 * outside the iothread mutex, in which case precise reference
777 * counting is necessary.
779 flatview_unref(old_view
);
781 address_space_update_ioeventfds(as
);
784 void memory_region_transaction_begin(void)
786 qemu_flush_coalesced_mmio_buffer();
787 ++memory_region_transaction_depth
;
790 static void memory_region_clear_pending(void)
792 memory_region_update_pending
= false;
793 ioeventfd_update_pending
= false;
796 void memory_region_transaction_commit(void)
800 assert(memory_region_transaction_depth
);
801 --memory_region_transaction_depth
;
802 if (!memory_region_transaction_depth
) {
803 if (memory_region_update_pending
) {
804 MEMORY_LISTENER_CALL_GLOBAL(begin
, Forward
);
806 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
807 address_space_update_topology(as
);
810 MEMORY_LISTENER_CALL_GLOBAL(commit
, Forward
);
811 } else if (ioeventfd_update_pending
) {
812 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
813 address_space_update_ioeventfds(as
);
816 memory_region_clear_pending();
820 static void memory_region_destructor_none(MemoryRegion
*mr
)
824 static void memory_region_destructor_ram(MemoryRegion
*mr
)
826 qemu_ram_free(mr
->ram_addr
);
829 static void memory_region_destructor_alias(MemoryRegion
*mr
)
831 memory_region_unref(mr
->alias
);
834 static void memory_region_destructor_ram_from_ptr(MemoryRegion
*mr
)
836 qemu_ram_free_from_ptr(mr
->ram_addr
);
839 static void memory_region_destructor_rom_device(MemoryRegion
*mr
)
841 qemu_ram_free(mr
->ram_addr
& TARGET_PAGE_MASK
);
844 static bool memory_region_need_escape(char c
)
846 return c
== '/' || c
== '[' || c
== '\\' || c
== ']';
849 static char *memory_region_escape_name(const char *name
)
856 for (p
= name
; *p
; p
++) {
857 bytes
+= memory_region_need_escape(*p
) ? 4 : 1;
859 if (bytes
== p
- name
) {
860 return g_memdup(name
, bytes
+ 1);
863 escaped
= g_malloc(bytes
+ 1);
864 for (p
= name
, q
= escaped
; *p
; p
++) {
866 if (unlikely(memory_region_need_escape(c
))) {
869 *q
++ = "0123456789abcdef"[c
>> 4];
870 c
= "0123456789abcdef"[c
& 15];
878 static void object_property_add_child_array(Object
*owner
,
883 char *base_name
= memory_region_escape_name(name
);
886 char *full_name
= g_strdup_printf("%s[%d]", base_name
, i
);
887 Error
*local_err
= NULL
;
889 object_property_add_child(owner
, full_name
, child
, &local_err
);
895 error_free(local_err
);
902 void memory_region_init(MemoryRegion
*mr
,
908 owner
= qdev_get_machine();
911 object_initialize(mr
, sizeof(*mr
), TYPE_MEMORY_REGION
);
912 mr
->size
= int128_make64(size
);
913 if (size
== UINT64_MAX
) {
914 mr
->size
= int128_2_64();
916 mr
->name
= g_strdup(name
);
919 object_property_add_child_array(owner
, name
, OBJECT(mr
));
920 object_unref(OBJECT(mr
));
924 static void memory_region_get_addr(Object
*obj
, Visitor
*v
, void *opaque
,
925 const char *name
, Error
**errp
)
927 MemoryRegion
*mr
= MEMORY_REGION(obj
);
928 uint64_t value
= mr
->addr
;
930 visit_type_uint64(v
, &value
, name
, errp
);
933 static void memory_region_get_container(Object
*obj
, Visitor
*v
, void *opaque
,
934 const char *name
, Error
**errp
)
936 MemoryRegion
*mr
= MEMORY_REGION(obj
);
937 gchar
*path
= (gchar
*)"";
940 path
= object_get_canonical_path(OBJECT(mr
->container
));
942 visit_type_str(v
, &path
, name
, errp
);
948 static Object
*memory_region_resolve_container(Object
*obj
, void *opaque
,
951 MemoryRegion
*mr
= MEMORY_REGION(obj
);
953 return OBJECT(mr
->container
);
956 static void memory_region_get_priority(Object
*obj
, Visitor
*v
, void *opaque
,
957 const char *name
, Error
**errp
)
959 MemoryRegion
*mr
= MEMORY_REGION(obj
);
960 int32_t value
= mr
->priority
;
962 visit_type_int32(v
, &value
, name
, errp
);
965 static bool memory_region_get_may_overlap(Object
*obj
, Error
**errp
)
967 MemoryRegion
*mr
= MEMORY_REGION(obj
);
969 return mr
->may_overlap
;
972 static void memory_region_get_size(Object
*obj
, Visitor
*v
, void *opaque
,
973 const char *name
, Error
**errp
)
975 MemoryRegion
*mr
= MEMORY_REGION(obj
);
976 uint64_t value
= memory_region_size(mr
);
978 visit_type_uint64(v
, &value
, name
, errp
);
981 static void memory_region_initfn(Object
*obj
)
983 MemoryRegion
*mr
= MEMORY_REGION(obj
);
986 mr
->ops
= &unassigned_mem_ops
;
988 mr
->romd_mode
= true;
989 mr
->destructor
= memory_region_destructor_none
;
990 QTAILQ_INIT(&mr
->subregions
);
991 QTAILQ_INIT(&mr
->coalesced
);
993 op
= object_property_add(OBJECT(mr
), "container",
994 "link<" TYPE_MEMORY_REGION
">",
995 memory_region_get_container
,
996 NULL
, /* memory_region_set_container */
997 NULL
, NULL
, &error_abort
);
998 op
->resolve
= memory_region_resolve_container
;
1000 object_property_add(OBJECT(mr
), "addr", "uint64",
1001 memory_region_get_addr
,
1002 NULL
, /* memory_region_set_addr */
1003 NULL
, NULL
, &error_abort
);
1004 object_property_add(OBJECT(mr
), "priority", "uint32",
1005 memory_region_get_priority
,
1006 NULL
, /* memory_region_set_priority */
1007 NULL
, NULL
, &error_abort
);
1008 object_property_add_bool(OBJECT(mr
), "may-overlap",
1009 memory_region_get_may_overlap
,
1010 NULL
, /* memory_region_set_may_overlap */
1012 object_property_add(OBJECT(mr
), "size", "uint64",
1013 memory_region_get_size
,
1014 NULL
, /* memory_region_set_size, */
1015 NULL
, NULL
, &error_abort
);
1018 static int qemu_target_backtrace(target_ulong
*array
, size_t size
)
1022 #if defined(TARGET_ARM)
1023 CPUArchState
*env
= current_cpu
->env_ptr
;
1024 array
[0] = env
->regs
[15];
1025 array
[1] = env
->regs
[14];
1026 #elif defined(TARGET_MIPS)
1027 CPUArchState
*env
= current_cpu
->env_ptr
;
1028 array
[0] = env
->active_tc
.PC
;
1029 array
[1] = env
->active_tc
.gpr
[31];
1039 #include "disas/disas.h"
1040 const char *qemu_sprint_backtrace(char *buffer
, size_t length
)
1044 target_ulong caller
[2];
1046 qemu_target_backtrace(caller
, 2);
1047 symbol
= lookup_symbol(caller
[0]);
1048 p
+= sprintf(p
, "[%s]", symbol
);
1049 symbol
= lookup_symbol(caller
[1]);
1050 p
+= sprintf(p
, "[%s]", symbol
);
1052 p
+= sprintf(p
, "[cpu not running]");
1054 assert((p
- buffer
) < length
);
1058 static uint64_t unassigned_mem_read(void *opaque
, hwaddr addr
,
1061 if (trace_unassigned
) {
1063 fprintf(stderr
, "Unassigned mem read " TARGET_FMT_plx
" %s\n",
1064 addr
, qemu_sprint_backtrace(buffer
, sizeof(buffer
)));
1067 if (current_cpu
!= NULL
) {
1068 cpu_unassigned_access(current_cpu
, addr
, false, false, 0, size
);
1073 static void unassigned_mem_write(void *opaque
, hwaddr addr
,
1074 uint64_t val
, unsigned size
)
1076 if (trace_unassigned
) {
1078 fprintf(stderr
, "Unassigned mem write " TARGET_FMT_plx
1079 " = 0x%" PRIx64
" %s\n",
1080 addr
, val
, qemu_sprint_backtrace(buffer
, sizeof(buffer
)));
1082 if (current_cpu
!= NULL
) {
1083 cpu_unassigned_access(current_cpu
, addr
, true, false, 0, size
);
1087 static bool unassigned_mem_accepts(void *opaque
, hwaddr addr
,
1088 unsigned size
, bool is_write
)
1093 const MemoryRegionOps unassigned_mem_ops
= {
1094 .valid
.accepts
= unassigned_mem_accepts
,
1095 .endianness
= DEVICE_NATIVE_ENDIAN
,
1098 bool memory_region_access_valid(MemoryRegion
*mr
,
1103 int access_size_min
, access_size_max
;
1106 if (!mr
->ops
->valid
.unaligned
&& (addr
& (size
- 1))) {
1107 fprintf(stderr
, "Misaligned i/o with size %u for memory region %s\n",
1112 if (!mr
->ops
->valid
.accepts
) {
1116 access_size_min
= mr
->ops
->valid
.min_access_size
;
1117 if (!mr
->ops
->valid
.min_access_size
) {
1118 access_size_min
= 1;
1121 access_size_max
= mr
->ops
->valid
.max_access_size
;
1122 if (!mr
->ops
->valid
.max_access_size
) {
1123 access_size_max
= 4;
1126 access_size
= MAX(MIN(size
, access_size_max
), access_size_min
);
1127 for (i
= 0; i
< size
; i
+= access_size
) {
1128 if (!mr
->ops
->valid
.accepts(mr
->opaque
, addr
+ i
, access_size
,
1137 static uint64_t memory_region_dispatch_read1(MemoryRegion
*mr
,
1143 if (mr
->ops
->read
) {
1144 access_with_adjusted_size(addr
, &data
, size
,
1145 mr
->ops
->impl
.min_access_size
,
1146 mr
->ops
->impl
.max_access_size
,
1147 memory_region_read_accessor
, mr
);
1149 access_with_adjusted_size(addr
, &data
, size
, 1, 4,
1150 memory_region_oldmmio_read_accessor
, mr
);
1156 static bool memory_region_dispatch_read(MemoryRegion
*mr
,
1161 if (!memory_region_access_valid(mr
, addr
, size
, false)) {
1162 *pval
= unassigned_mem_read(mr
, addr
, size
);
1166 *pval
= memory_region_dispatch_read1(mr
, addr
, size
);
1167 adjust_endianness(mr
, pval
, size
);
1171 static bool memory_region_dispatch_write(MemoryRegion
*mr
,
1176 if (!memory_region_access_valid(mr
, addr
, size
, true)) {
1177 unassigned_mem_write(mr
, addr
, data
, size
);
1181 adjust_endianness(mr
, &data
, size
);
1183 if (mr
->ops
->write
) {
1184 access_with_adjusted_size(addr
, &data
, size
,
1185 mr
->ops
->impl
.min_access_size
,
1186 mr
->ops
->impl
.max_access_size
,
1187 memory_region_write_accessor
, mr
);
1189 access_with_adjusted_size(addr
, &data
, size
, 1, 4,
1190 memory_region_oldmmio_write_accessor
, mr
);
1195 void memory_region_init_io(MemoryRegion
*mr
,
1197 const MemoryRegionOps
*ops
,
1202 memory_region_init(mr
, owner
, name
, size
);
1204 mr
->opaque
= opaque
;
1205 mr
->terminates
= true;
1206 mr
->ram_addr
= ~(ram_addr_t
)0;
1209 void memory_region_init_ram(MemoryRegion
*mr
,
1214 memory_region_init(mr
, owner
, name
, size
);
1216 mr
->terminates
= true;
1217 mr
->destructor
= memory_region_destructor_ram
;
1218 mr
->ram_addr
= qemu_ram_alloc(size
, mr
);
1222 void memory_region_init_ram_from_file(MemoryRegion
*mr
,
1223 struct Object
*owner
,
1230 memory_region_init(mr
, owner
, name
, size
);
1232 mr
->terminates
= true;
1233 mr
->destructor
= memory_region_destructor_ram
;
1234 mr
->ram_addr
= qemu_ram_alloc_from_file(size
, mr
, share
, path
, errp
);
1238 void memory_region_init_ram_ptr(MemoryRegion
*mr
,
1244 memory_region_init(mr
, owner
, name
, size
);
1246 mr
->terminates
= true;
1247 mr
->destructor
= memory_region_destructor_ram_from_ptr
;
1248 mr
->ram_addr
= qemu_ram_alloc_from_ptr(size
, ptr
, mr
);
1251 void memory_region_init_alias(MemoryRegion
*mr
,
1258 memory_region_init(mr
, owner
, name
, size
);
1259 memory_region_ref(orig
);
1260 mr
->destructor
= memory_region_destructor_alias
;
1262 mr
->alias_offset
= offset
;
1265 void memory_region_init_rom_device(MemoryRegion
*mr
,
1267 const MemoryRegionOps
*ops
,
1272 memory_region_init(mr
, owner
, name
, size
);
1274 mr
->opaque
= opaque
;
1275 mr
->terminates
= true;
1276 mr
->rom_device
= true;
1277 mr
->destructor
= memory_region_destructor_rom_device
;
1278 mr
->ram_addr
= qemu_ram_alloc(size
, mr
);
1281 void memory_region_init_iommu(MemoryRegion
*mr
,
1283 const MemoryRegionIOMMUOps
*ops
,
1287 memory_region_init(mr
, owner
, name
, size
);
1288 mr
->iommu_ops
= ops
,
1289 mr
->terminates
= true; /* then re-forwards */
1290 notifier_list_init(&mr
->iommu_notify
);
1293 void memory_region_init_reservation(MemoryRegion
*mr
,
1298 memory_region_init_io(mr
, owner
, &unassigned_mem_ops
, mr
, name
, size
);
1301 static void memory_region_finalize(Object
*obj
)
1303 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1305 assert(QTAILQ_EMPTY(&mr
->subregions
));
1306 assert(memory_region_transaction_depth
== 0);
1308 memory_region_clear_coalescing(mr
);
1309 g_free((char *)mr
->name
);
1310 g_free(mr
->ioeventfds
);
1313 void memory_region_destroy(MemoryRegion
*mr
)
1315 object_unparent(OBJECT(mr
));
1319 Object
*memory_region_owner(MemoryRegion
*mr
)
1321 Object
*obj
= OBJECT(mr
);
1325 void memory_region_ref(MemoryRegion
*mr
)
1327 /* MMIO callbacks most likely will access data that belongs
1328 * to the owner, hence the need to ref/unref the owner whenever
1329 * the memory region is in use.
1331 * The memory region is a child of its owner. As long as the
1332 * owner doesn't call unparent itself on the memory region,
1333 * ref-ing the owner will also keep the memory region alive.
1334 * Memory regions without an owner are supposed to never go away,
1335 * but we still ref/unref them for debugging purposes.
1337 Object
*obj
= OBJECT(mr
);
1338 if (obj
&& obj
->parent
) {
1339 object_ref(obj
->parent
);
1345 void memory_region_unref(MemoryRegion
*mr
)
1347 Object
*obj
= OBJECT(mr
);
1348 if (obj
&& obj
->parent
) {
1349 object_unref(obj
->parent
);
1355 uint64_t memory_region_size(MemoryRegion
*mr
)
1357 if (int128_eq(mr
->size
, int128_2_64())) {
1360 return int128_get64(mr
->size
);
1363 const char *memory_region_name(MemoryRegion
*mr
)
1368 bool memory_region_is_ram(MemoryRegion
*mr
)
1373 bool memory_region_is_logging(MemoryRegion
*mr
)
1375 return mr
->dirty_log_mask
;
1378 bool memory_region_is_rom(MemoryRegion
*mr
)
1380 return mr
->ram
&& mr
->readonly
;
1383 bool memory_region_is_iommu(MemoryRegion
*mr
)
1385 return mr
->iommu_ops
;
1388 void memory_region_register_iommu_notifier(MemoryRegion
*mr
, Notifier
*n
)
1390 notifier_list_add(&mr
->iommu_notify
, n
);
1393 void memory_region_unregister_iommu_notifier(Notifier
*n
)
1398 void memory_region_notify_iommu(MemoryRegion
*mr
,
1399 IOMMUTLBEntry entry
)
1401 assert(memory_region_is_iommu(mr
));
1402 notifier_list_notify(&mr
->iommu_notify
, &entry
);
1405 void memory_region_set_log(MemoryRegion
*mr
, bool log
, unsigned client
)
1407 uint8_t mask
= 1 << client
;
1409 memory_region_transaction_begin();
1410 mr
->dirty_log_mask
= (mr
->dirty_log_mask
& ~mask
) | (log
* mask
);
1411 memory_region_update_pending
|= mr
->enabled
;
1412 memory_region_transaction_commit();
1415 bool memory_region_get_dirty(MemoryRegion
*mr
, hwaddr addr
,
1416 hwaddr size
, unsigned client
)
1418 assert(mr
->terminates
);
1419 return cpu_physical_memory_get_dirty(mr
->ram_addr
+ addr
, size
, client
);
1422 void memory_region_set_dirty(MemoryRegion
*mr
, hwaddr addr
,
1425 assert(mr
->terminates
);
1426 cpu_physical_memory_set_dirty_range(mr
->ram_addr
+ addr
, size
);
1429 bool memory_region_test_and_clear_dirty(MemoryRegion
*mr
, hwaddr addr
,
1430 hwaddr size
, unsigned client
)
1433 assert(mr
->terminates
);
1434 ret
= cpu_physical_memory_get_dirty(mr
->ram_addr
+ addr
, size
, client
);
1436 cpu_physical_memory_reset_dirty(mr
->ram_addr
+ addr
, size
, client
);
1442 void memory_region_sync_dirty_bitmap(MemoryRegion
*mr
)
1447 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1448 FlatView
*view
= address_space_get_flatview(as
);
1449 FOR_EACH_FLAT_RANGE(fr
, view
) {
1451 MEMORY_LISTENER_UPDATE_REGION(fr
, as
, Forward
, log_sync
);
1454 flatview_unref(view
);
1458 void memory_region_set_readonly(MemoryRegion
*mr
, bool readonly
)
1460 if (mr
->readonly
!= readonly
) {
1461 memory_region_transaction_begin();
1462 mr
->readonly
= readonly
;
1463 memory_region_update_pending
|= mr
->enabled
;
1464 memory_region_transaction_commit();
1468 void memory_region_rom_device_set_romd(MemoryRegion
*mr
, bool romd_mode
)
1470 if (mr
->romd_mode
!= romd_mode
) {
1471 memory_region_transaction_begin();
1472 mr
->romd_mode
= romd_mode
;
1473 memory_region_update_pending
|= mr
->enabled
;
1474 memory_region_transaction_commit();
1478 void memory_region_reset_dirty(MemoryRegion
*mr
, hwaddr addr
,
1479 hwaddr size
, unsigned client
)
1481 assert(mr
->terminates
);
1482 cpu_physical_memory_reset_dirty(mr
->ram_addr
+ addr
, size
, client
);
1485 int memory_region_get_fd(MemoryRegion
*mr
)
1488 return memory_region_get_fd(mr
->alias
);
1491 assert(mr
->terminates
);
1493 return qemu_get_ram_fd(mr
->ram_addr
& TARGET_PAGE_MASK
);
1496 void *memory_region_get_ram_ptr(MemoryRegion
*mr
)
1499 return memory_region_get_ram_ptr(mr
->alias
) + mr
->alias_offset
;
1502 assert(mr
->terminates
);
1504 return qemu_get_ram_ptr(mr
->ram_addr
& TARGET_PAGE_MASK
);
1507 static void memory_region_update_coalesced_range_as(MemoryRegion
*mr
, AddressSpace
*as
)
1511 CoalescedMemoryRange
*cmr
;
1513 MemoryRegionSection section
;
1515 view
= address_space_get_flatview(as
);
1516 FOR_EACH_FLAT_RANGE(fr
, view
) {
1518 section
= (MemoryRegionSection
) {
1519 .address_space
= as
,
1520 .offset_within_address_space
= int128_get64(fr
->addr
.start
),
1521 .size
= fr
->addr
.size
,
1524 MEMORY_LISTENER_CALL(coalesced_mmio_del
, Reverse
, §ion
,
1525 int128_get64(fr
->addr
.start
),
1526 int128_get64(fr
->addr
.size
));
1527 QTAILQ_FOREACH(cmr
, &mr
->coalesced
, link
) {
1528 tmp
= addrrange_shift(cmr
->addr
,
1529 int128_sub(fr
->addr
.start
,
1530 int128_make64(fr
->offset_in_region
)));
1531 if (!addrrange_intersects(tmp
, fr
->addr
)) {
1534 tmp
= addrrange_intersection(tmp
, fr
->addr
);
1535 MEMORY_LISTENER_CALL(coalesced_mmio_add
, Forward
, §ion
,
1536 int128_get64(tmp
.start
),
1537 int128_get64(tmp
.size
));
1541 flatview_unref(view
);
1544 static void memory_region_update_coalesced_range(MemoryRegion
*mr
)
1548 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1549 memory_region_update_coalesced_range_as(mr
, as
);
1553 void memory_region_set_coalescing(MemoryRegion
*mr
)
1555 memory_region_clear_coalescing(mr
);
1556 memory_region_add_coalescing(mr
, 0, int128_get64(mr
->size
));
1559 void memory_region_add_coalescing(MemoryRegion
*mr
,
1563 CoalescedMemoryRange
*cmr
= g_malloc(sizeof(*cmr
));
1565 cmr
->addr
= addrrange_make(int128_make64(offset
), int128_make64(size
));
1566 QTAILQ_INSERT_TAIL(&mr
->coalesced
, cmr
, link
);
1567 memory_region_update_coalesced_range(mr
);
1568 memory_region_set_flush_coalesced(mr
);
1571 void memory_region_clear_coalescing(MemoryRegion
*mr
)
1573 CoalescedMemoryRange
*cmr
;
1574 bool updated
= false;
1576 qemu_flush_coalesced_mmio_buffer();
1577 mr
->flush_coalesced_mmio
= false;
1579 while (!QTAILQ_EMPTY(&mr
->coalesced
)) {
1580 cmr
= QTAILQ_FIRST(&mr
->coalesced
);
1581 QTAILQ_REMOVE(&mr
->coalesced
, cmr
, link
);
1587 memory_region_update_coalesced_range(mr
);
1591 void memory_region_set_flush_coalesced(MemoryRegion
*mr
)
1593 mr
->flush_coalesced_mmio
= true;
1596 void memory_region_clear_flush_coalesced(MemoryRegion
*mr
)
1598 qemu_flush_coalesced_mmio_buffer();
1599 if (QTAILQ_EMPTY(&mr
->coalesced
)) {
1600 mr
->flush_coalesced_mmio
= false;
1604 void memory_region_add_eventfd(MemoryRegion
*mr
,
1611 MemoryRegionIoeventfd mrfd
= {
1612 .addr
.start
= int128_make64(addr
),
1613 .addr
.size
= int128_make64(size
),
1614 .match_data
= match_data
,
1620 adjust_endianness(mr
, &mrfd
.data
, size
);
1621 memory_region_transaction_begin();
1622 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
1623 if (memory_region_ioeventfd_before(mrfd
, mr
->ioeventfds
[i
])) {
1628 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
1629 sizeof(*mr
->ioeventfds
) * mr
->ioeventfd_nb
);
1630 memmove(&mr
->ioeventfds
[i
+1], &mr
->ioeventfds
[i
],
1631 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
-1 - i
));
1632 mr
->ioeventfds
[i
] = mrfd
;
1633 ioeventfd_update_pending
|= mr
->enabled
;
1634 memory_region_transaction_commit();
1637 void memory_region_del_eventfd(MemoryRegion
*mr
,
1644 MemoryRegionIoeventfd mrfd
= {
1645 .addr
.start
= int128_make64(addr
),
1646 .addr
.size
= int128_make64(size
),
1647 .match_data
= match_data
,
1653 adjust_endianness(mr
, &mrfd
.data
, size
);
1654 memory_region_transaction_begin();
1655 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
1656 if (memory_region_ioeventfd_equal(mrfd
, mr
->ioeventfds
[i
])) {
1660 assert(i
!= mr
->ioeventfd_nb
);
1661 memmove(&mr
->ioeventfds
[i
], &mr
->ioeventfds
[i
+1],
1662 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
- (i
+1)));
1664 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
1665 sizeof(*mr
->ioeventfds
)*mr
->ioeventfd_nb
+ 1);
1666 ioeventfd_update_pending
|= mr
->enabled
;
1667 memory_region_transaction_commit();
1670 static void memory_region_update_container_subregions(MemoryRegion
*subregion
)
1672 hwaddr offset
= subregion
->addr
;
1673 MemoryRegion
*mr
= subregion
->container
;
1674 MemoryRegion
*other
;
1676 memory_region_transaction_begin();
1678 memory_region_ref(subregion
);
1679 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
1680 if (subregion
->may_overlap
|| other
->may_overlap
) {
1683 if (int128_ge(int128_make64(offset
),
1684 int128_add(int128_make64(other
->addr
), other
->size
))
1685 || int128_le(int128_add(int128_make64(offset
), subregion
->size
),
1686 int128_make64(other
->addr
))) {
1690 printf("warning: subregion collision %llx/%llx (%s) "
1691 "vs %llx/%llx (%s)\n",
1692 (unsigned long long)offset
,
1693 (unsigned long long)int128_get64(subregion
->size
),
1695 (unsigned long long)other
->addr
,
1696 (unsigned long long)int128_get64(other
->size
),
1700 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
1701 if (subregion
->priority
>= other
->priority
) {
1702 QTAILQ_INSERT_BEFORE(other
, subregion
, subregions_link
);
1706 QTAILQ_INSERT_TAIL(&mr
->subregions
, subregion
, subregions_link
);
1708 memory_region_update_pending
|= mr
->enabled
&& subregion
->enabled
;
1709 memory_region_transaction_commit();
1712 static void memory_region_add_subregion_common(MemoryRegion
*mr
,
1714 MemoryRegion
*subregion
)
1716 assert(!subregion
->container
);
1717 subregion
->container
= mr
;
1718 subregion
->addr
= offset
;
1719 memory_region_update_container_subregions(subregion
);
1722 void memory_region_add_subregion(MemoryRegion
*mr
,
1724 MemoryRegion
*subregion
)
1726 subregion
->may_overlap
= false;
1727 subregion
->priority
= 0;
1728 memory_region_add_subregion_common(mr
, offset
, subregion
);
1731 void memory_region_add_subregion_overlap(MemoryRegion
*mr
,
1733 MemoryRegion
*subregion
,
1736 subregion
->may_overlap
= true;
1737 subregion
->priority
= priority
;
1738 memory_region_add_subregion_common(mr
, offset
, subregion
);
1741 void memory_region_del_subregion(MemoryRegion
*mr
,
1742 MemoryRegion
*subregion
)
1744 memory_region_transaction_begin();
1745 assert(subregion
->container
== mr
);
1746 subregion
->container
= NULL
;
1747 QTAILQ_REMOVE(&mr
->subregions
, subregion
, subregions_link
);
1748 memory_region_unref(subregion
);
1749 memory_region_update_pending
|= mr
->enabled
&& subregion
->enabled
;
1750 memory_region_transaction_commit();
1753 void memory_region_set_enabled(MemoryRegion
*mr
, bool enabled
)
1755 if (enabled
== mr
->enabled
) {
1758 memory_region_transaction_begin();
1759 mr
->enabled
= enabled
;
1760 memory_region_update_pending
= true;
1761 memory_region_transaction_commit();
1764 static void memory_region_readd_subregion(MemoryRegion
*mr
)
1766 MemoryRegion
*container
= mr
->container
;
1769 memory_region_transaction_begin();
1770 memory_region_ref(mr
);
1771 memory_region_del_subregion(container
, mr
);
1772 mr
->container
= container
;
1773 memory_region_update_container_subregions(mr
);
1774 memory_region_unref(mr
);
1775 memory_region_transaction_commit();
1779 void memory_region_set_address(MemoryRegion
*mr
, hwaddr addr
)
1781 if (addr
!= mr
->addr
) {
1783 memory_region_readd_subregion(mr
);
1787 void memory_region_set_alias_offset(MemoryRegion
*mr
, hwaddr offset
)
1791 if (offset
== mr
->alias_offset
) {
1795 memory_region_transaction_begin();
1796 mr
->alias_offset
= offset
;
1797 memory_region_update_pending
|= mr
->enabled
;
1798 memory_region_transaction_commit();
1801 ram_addr_t
memory_region_get_ram_addr(MemoryRegion
*mr
)
1803 return mr
->ram_addr
;
1806 static int cmp_flatrange_addr(const void *addr_
, const void *fr_
)
1808 const AddrRange
*addr
= addr_
;
1809 const FlatRange
*fr
= fr_
;
1811 if (int128_le(addrrange_end(*addr
), fr
->addr
.start
)) {
1813 } else if (int128_ge(addr
->start
, addrrange_end(fr
->addr
))) {
1819 static FlatRange
*flatview_lookup(FlatView
*view
, AddrRange addr
)
1821 return bsearch(&addr
, view
->ranges
, view
->nr
,
1822 sizeof(FlatRange
), cmp_flatrange_addr
);
1825 bool memory_region_present(MemoryRegion
*container
, hwaddr addr
)
1827 MemoryRegion
*mr
= memory_region_find(container
, addr
, 1).mr
;
1828 if (!mr
|| (mr
== container
)) {
1831 memory_region_unref(mr
);
1835 bool memory_region_is_mapped(MemoryRegion
*mr
)
1837 return mr
->container
? true : false;
1840 MemoryRegionSection
memory_region_find(MemoryRegion
*mr
,
1841 hwaddr addr
, uint64_t size
)
1843 MemoryRegionSection ret
= { .mr
= NULL
};
1851 for (root
= mr
; root
->container
; ) {
1852 root
= root
->container
;
1856 as
= memory_region_to_address_space(root
);
1860 range
= addrrange_make(int128_make64(addr
), int128_make64(size
));
1862 view
= address_space_get_flatview(as
);
1863 fr
= flatview_lookup(view
, range
);
1865 flatview_unref(view
);
1869 while (fr
> view
->ranges
&& addrrange_intersects(fr
[-1].addr
, range
)) {
1874 ret
.address_space
= as
;
1875 range
= addrrange_intersection(range
, fr
->addr
);
1876 ret
.offset_within_region
= fr
->offset_in_region
;
1877 ret
.offset_within_region
+= int128_get64(int128_sub(range
.start
,
1879 ret
.size
= range
.size
;
1880 ret
.offset_within_address_space
= int128_get64(range
.start
);
1881 ret
.readonly
= fr
->readonly
;
1882 memory_region_ref(ret
.mr
);
1884 flatview_unref(view
);
1888 void address_space_sync_dirty_bitmap(AddressSpace
*as
)
1893 view
= address_space_get_flatview(as
);
1894 FOR_EACH_FLAT_RANGE(fr
, view
) {
1895 MEMORY_LISTENER_UPDATE_REGION(fr
, as
, Forward
, log_sync
);
1897 flatview_unref(view
);
1900 void memory_global_dirty_log_start(void)
1902 global_dirty_log
= true;
1903 MEMORY_LISTENER_CALL_GLOBAL(log_global_start
, Forward
);
1906 void memory_global_dirty_log_stop(void)
1908 global_dirty_log
= false;
1909 MEMORY_LISTENER_CALL_GLOBAL(log_global_stop
, Reverse
);
1912 static void listener_add_address_space(MemoryListener
*listener
,
1918 if (listener
->address_space_filter
1919 && listener
->address_space_filter
!= as
) {
1923 if (global_dirty_log
) {
1924 if (listener
->log_global_start
) {
1925 listener
->log_global_start(listener
);
1929 view
= address_space_get_flatview(as
);
1930 FOR_EACH_FLAT_RANGE(fr
, view
) {
1931 MemoryRegionSection section
= {
1933 .address_space
= as
,
1934 .offset_within_region
= fr
->offset_in_region
,
1935 .size
= fr
->addr
.size
,
1936 .offset_within_address_space
= int128_get64(fr
->addr
.start
),
1937 .readonly
= fr
->readonly
,
1939 if (listener
->region_add
) {
1940 listener
->region_add(listener
, §ion
);
1943 flatview_unref(view
);
1946 void memory_listener_register(MemoryListener
*listener
, AddressSpace
*filter
)
1948 MemoryListener
*other
= NULL
;
1951 listener
->address_space_filter
= filter
;
1952 if (QTAILQ_EMPTY(&memory_listeners
)
1953 || listener
->priority
>= QTAILQ_LAST(&memory_listeners
,
1954 memory_listeners
)->priority
) {
1955 QTAILQ_INSERT_TAIL(&memory_listeners
, listener
, link
);
1957 QTAILQ_FOREACH(other
, &memory_listeners
, link
) {
1958 if (listener
->priority
< other
->priority
) {
1962 QTAILQ_INSERT_BEFORE(other
, listener
, link
);
1965 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1966 listener_add_address_space(listener
, as
);
1970 void memory_listener_unregister(MemoryListener
*listener
)
1972 QTAILQ_REMOVE(&memory_listeners
, listener
, link
);
1975 void address_space_init(AddressSpace
*as
, MemoryRegion
*root
, const char *name
)
1977 if (QTAILQ_EMPTY(&address_spaces
)) {
1981 memory_region_transaction_begin();
1983 as
->current_map
= g_new(FlatView
, 1);
1984 flatview_init(as
->current_map
);
1985 as
->ioeventfd_nb
= 0;
1986 as
->ioeventfds
= NULL
;
1987 QTAILQ_INSERT_TAIL(&address_spaces
, as
, address_spaces_link
);
1988 as
->name
= g_strdup(name
? name
: "anonymous");
1989 address_space_init_dispatch(as
);
1990 memory_region_update_pending
|= root
->enabled
;
1991 memory_region_transaction_commit();
1994 void address_space_destroy(AddressSpace
*as
)
1996 MemoryListener
*listener
;
1998 /* Flush out anything from MemoryListeners listening in on this */
1999 memory_region_transaction_begin();
2001 memory_region_transaction_commit();
2002 QTAILQ_REMOVE(&address_spaces
, as
, address_spaces_link
);
2003 address_space_destroy_dispatch(as
);
2005 QTAILQ_FOREACH(listener
, &memory_listeners
, link
) {
2006 assert(listener
->address_space_filter
!= as
);
2009 flatview_unref(as
->current_map
);
2011 g_free(as
->ioeventfds
);
2014 bool io_mem_read(MemoryRegion
*mr
, hwaddr addr
, uint64_t *pval
, unsigned size
)
2016 return memory_region_dispatch_read(mr
, addr
, pval
, size
);
2019 bool io_mem_write(MemoryRegion
*mr
, hwaddr addr
,
2020 uint64_t val
, unsigned size
)
2022 return memory_region_dispatch_write(mr
, addr
, val
, size
);
2025 typedef struct MemoryRegionList MemoryRegionList
;
2027 struct MemoryRegionList
{
2028 const MemoryRegion
*mr
;
2030 QTAILQ_ENTRY(MemoryRegionList
) queue
;
2033 typedef QTAILQ_HEAD(queue
, MemoryRegionList
) MemoryRegionListHead
;
2035 static void mtree_print_mr(fprintf_function mon_printf
, void *f
,
2036 const MemoryRegion
*mr
, unsigned int level
,
2038 MemoryRegionListHead
*alias_print_queue
)
2040 MemoryRegionList
*new_ml
, *ml
, *next_ml
;
2041 MemoryRegionListHead submr_print_queue
;
2042 const MemoryRegion
*submr
;
2045 if (!mr
|| !mr
->enabled
) {
2049 for (i
= 0; i
< level
; i
++) {
2054 MemoryRegionList
*ml
;
2057 /* check if the alias is already in the queue */
2058 QTAILQ_FOREACH(ml
, alias_print_queue
, queue
) {
2059 if (ml
->mr
== mr
->alias
&& !ml
->printed
) {
2065 ml
= g_new(MemoryRegionList
, 1);
2067 ml
->printed
= false;
2068 QTAILQ_INSERT_TAIL(alias_print_queue
, ml
, queue
);
2070 mon_printf(f
, TARGET_FMT_plx
"-" TARGET_FMT_plx
2071 " (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx
2072 "-" TARGET_FMT_plx
"\n",
2075 + (int128_nz(mr
->size
) ?
2076 (hwaddr
)int128_get64(int128_sub(mr
->size
,
2077 int128_one())) : 0),
2079 mr
->romd_mode
? 'R' : '-',
2080 !mr
->readonly
&& !(mr
->rom_device
&& mr
->romd_mode
) ? 'W'
2086 + (int128_nz(mr
->size
) ?
2087 (hwaddr
)int128_get64(int128_sub(mr
->size
,
2088 int128_one())) : 0));
2091 TARGET_FMT_plx
"-" TARGET_FMT_plx
" (prio %d, %c%c): %s\n",
2094 + (int128_nz(mr
->size
) ?
2095 (hwaddr
)int128_get64(int128_sub(mr
->size
,
2096 int128_one())) : 0),
2098 mr
->romd_mode
? 'R' : '-',
2099 !mr
->readonly
&& !(mr
->rom_device
&& mr
->romd_mode
) ? 'W'
2104 QTAILQ_INIT(&submr_print_queue
);
2106 QTAILQ_FOREACH(submr
, &mr
->subregions
, subregions_link
) {
2107 new_ml
= g_new(MemoryRegionList
, 1);
2109 QTAILQ_FOREACH(ml
, &submr_print_queue
, queue
) {
2110 if (new_ml
->mr
->addr
< ml
->mr
->addr
||
2111 (new_ml
->mr
->addr
== ml
->mr
->addr
&&
2112 new_ml
->mr
->priority
> ml
->mr
->priority
)) {
2113 QTAILQ_INSERT_BEFORE(ml
, new_ml
, queue
);
2119 QTAILQ_INSERT_TAIL(&submr_print_queue
, new_ml
, queue
);
2123 QTAILQ_FOREACH(ml
, &submr_print_queue
, queue
) {
2124 mtree_print_mr(mon_printf
, f
, ml
->mr
, level
+ 1, base
+ mr
->addr
,
2128 QTAILQ_FOREACH_SAFE(ml
, &submr_print_queue
, queue
, next_ml
) {
2133 void mtree_info(fprintf_function mon_printf
, void *f
)
2135 MemoryRegionListHead ml_head
;
2136 MemoryRegionList
*ml
, *ml2
;
2139 QTAILQ_INIT(&ml_head
);
2141 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
2142 mon_printf(f
, "%s\n", as
->name
);
2143 mtree_print_mr(mon_printf
, f
, as
->root
, 0, 0, &ml_head
);
2146 mon_printf(f
, "aliases\n");
2147 /* print aliased regions */
2148 QTAILQ_FOREACH(ml
, &ml_head
, queue
) {
2150 mon_printf(f
, "%s\n", ml
->mr
->name
);
2151 mtree_print_mr(mon_printf
, f
, ml
->mr
, 0, 0, &ml_head
);
2155 QTAILQ_FOREACH_SAFE(ml
, &ml_head
, queue
, ml2
) {
2160 static const TypeInfo memory_region_info
= {
2161 .parent
= TYPE_OBJECT
,
2162 .name
= TYPE_MEMORY_REGION
,
2163 .instance_size
= sizeof(MemoryRegion
),
2164 .instance_init
= memory_region_initfn
,
2165 .instance_finalize
= memory_region_finalize
,
2168 static void memory_register_types(void)
2170 type_register_static(&memory_region_info
);
2173 type_init(memory_register_types
)