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 "qemu/osdep.h"
18 #include "qapi/error.h"
19 #include "exec/memory.h"
20 #include "qapi/visitor.h"
21 #include "qemu/bitops.h"
22 #include "qemu/error-report.h"
23 #include "qemu/main-loop.h"
24 #include "qemu/qemu-print.h"
25 #include "qom/object.h"
28 #include "exec/memory-internal.h"
29 #include "exec/ram_addr.h"
30 #include "sysemu/kvm.h"
31 #include "sysemu/runstate.h"
32 #include "sysemu/tcg.h"
33 #include "qemu/accel.h"
34 #include "hw/boards.h"
35 #include "migration/vmstate.h"
36 #include "exec/address-spaces.h"
38 //#define DEBUG_UNASSIGNED
40 static unsigned memory_region_transaction_depth
;
41 static bool memory_region_update_pending
;
42 static bool ioeventfd_update_pending
;
43 unsigned int global_dirty_tracking
;
45 static QTAILQ_HEAD(, MemoryListener
) memory_listeners
46 = QTAILQ_HEAD_INITIALIZER(memory_listeners
);
48 static QTAILQ_HEAD(, AddressSpace
) address_spaces
49 = QTAILQ_HEAD_INITIALIZER(address_spaces
);
51 static GHashTable
*flat_views
;
53 typedef struct AddrRange AddrRange
;
56 * Note that signed integers are needed for negative offsetting in aliases
57 * (large MemoryRegion::alias_offset).
64 static AddrRange
addrrange_make(Int128 start
, Int128 size
)
66 return (AddrRange
) { start
, size
};
69 static bool addrrange_equal(AddrRange r1
, AddrRange r2
)
71 return int128_eq(r1
.start
, r2
.start
) && int128_eq(r1
.size
, r2
.size
);
74 static Int128
addrrange_end(AddrRange r
)
76 return int128_add(r
.start
, r
.size
);
79 static AddrRange
addrrange_shift(AddrRange range
, Int128 delta
)
81 int128_addto(&range
.start
, delta
);
85 static bool addrrange_contains(AddrRange range
, Int128 addr
)
87 return int128_ge(addr
, range
.start
)
88 && int128_lt(addr
, addrrange_end(range
));
91 static bool addrrange_intersects(AddrRange r1
, AddrRange r2
)
93 return addrrange_contains(r1
, r2
.start
)
94 || addrrange_contains(r2
, r1
.start
);
97 static AddrRange
addrrange_intersection(AddrRange r1
, AddrRange r2
)
99 Int128 start
= int128_max(r1
.start
, r2
.start
);
100 Int128 end
= int128_min(addrrange_end(r1
), addrrange_end(r2
));
101 return addrrange_make(start
, int128_sub(end
, start
));
104 enum ListenerDirection
{ Forward
, Reverse
};
106 #define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
108 MemoryListener *_listener; \
110 switch (_direction) { \
112 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
113 if (_listener->_callback) { \
114 _listener->_callback(_listener, ##_args); \
119 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, link) { \
120 if (_listener->_callback) { \
121 _listener->_callback(_listener, ##_args); \
130 #define MEMORY_LISTENER_CALL(_as, _callback, _direction, _section, _args...) \
132 MemoryListener *_listener; \
134 switch (_direction) { \
136 QTAILQ_FOREACH(_listener, &(_as)->listeners, link_as) { \
137 if (_listener->_callback) { \
138 _listener->_callback(_listener, _section, ##_args); \
143 QTAILQ_FOREACH_REVERSE(_listener, &(_as)->listeners, link_as) { \
144 if (_listener->_callback) { \
145 _listener->_callback(_listener, _section, ##_args); \
154 /* No need to ref/unref .mr, the FlatRange keeps it alive. */
155 #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback, _args...) \
157 MemoryRegionSection mrs = section_from_flat_range(fr, \
158 address_space_to_flatview(as)); \
159 MEMORY_LISTENER_CALL(as, callback, dir, &mrs, ##_args); \
162 struct CoalescedMemoryRange
{
164 QTAILQ_ENTRY(CoalescedMemoryRange
) link
;
167 struct MemoryRegionIoeventfd
{
174 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd
*a
,
175 MemoryRegionIoeventfd
*b
)
177 if (int128_lt(a
->addr
.start
, b
->addr
.start
)) {
179 } else if (int128_gt(a
->addr
.start
, b
->addr
.start
)) {
181 } else if (int128_lt(a
->addr
.size
, b
->addr
.size
)) {
183 } else if (int128_gt(a
->addr
.size
, b
->addr
.size
)) {
185 } else if (a
->match_data
< b
->match_data
) {
187 } else if (a
->match_data
> b
->match_data
) {
189 } else if (a
->match_data
) {
190 if (a
->data
< b
->data
) {
192 } else if (a
->data
> b
->data
) {
198 } else if (a
->e
> b
->e
) {
204 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd
*a
,
205 MemoryRegionIoeventfd
*b
)
207 if (int128_eq(a
->addr
.start
, b
->addr
.start
) &&
208 (!int128_nz(a
->addr
.size
) || !int128_nz(b
->addr
.size
) ||
209 (int128_eq(a
->addr
.size
, b
->addr
.size
) &&
210 (a
->match_data
== b
->match_data
) &&
211 ((a
->match_data
&& (a
->data
== b
->data
)) || !a
->match_data
) &&
218 /* Range of memory in the global map. Addresses are absolute. */
221 hwaddr offset_in_region
;
223 uint8_t dirty_log_mask
;
229 #define FOR_EACH_FLAT_RANGE(var, view) \
230 for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
232 static inline MemoryRegionSection
233 section_from_flat_range(FlatRange
*fr
, FlatView
*fv
)
235 return (MemoryRegionSection
) {
238 .offset_within_region
= fr
->offset_in_region
,
239 .size
= fr
->addr
.size
,
240 .offset_within_address_space
= int128_get64(fr
->addr
.start
),
241 .readonly
= fr
->readonly
,
242 .nonvolatile
= fr
->nonvolatile
,
246 static bool flatrange_equal(FlatRange
*a
, FlatRange
*b
)
248 return a
->mr
== b
->mr
249 && addrrange_equal(a
->addr
, b
->addr
)
250 && a
->offset_in_region
== b
->offset_in_region
251 && a
->romd_mode
== b
->romd_mode
252 && a
->readonly
== b
->readonly
253 && a
->nonvolatile
== b
->nonvolatile
;
256 static FlatView
*flatview_new(MemoryRegion
*mr_root
)
260 view
= g_new0(FlatView
, 1);
262 view
->root
= mr_root
;
263 memory_region_ref(mr_root
);
264 trace_flatview_new(view
, mr_root
);
269 /* Insert a range into a given position. Caller is responsible for maintaining
272 static void flatview_insert(FlatView
*view
, unsigned pos
, FlatRange
*range
)
274 if (view
->nr
== view
->nr_allocated
) {
275 view
->nr_allocated
= MAX(2 * view
->nr
, 10);
276 view
->ranges
= g_realloc(view
->ranges
,
277 view
->nr_allocated
* sizeof(*view
->ranges
));
279 memmove(view
->ranges
+ pos
+ 1, view
->ranges
+ pos
,
280 (view
->nr
- pos
) * sizeof(FlatRange
));
281 view
->ranges
[pos
] = *range
;
282 memory_region_ref(range
->mr
);
286 static void flatview_destroy(FlatView
*view
)
290 trace_flatview_destroy(view
, view
->root
);
291 if (view
->dispatch
) {
292 address_space_dispatch_free(view
->dispatch
);
294 for (i
= 0; i
< view
->nr
; i
++) {
295 memory_region_unref(view
->ranges
[i
].mr
);
297 g_free(view
->ranges
);
298 memory_region_unref(view
->root
);
302 static bool flatview_ref(FlatView
*view
)
304 return qatomic_fetch_inc_nonzero(&view
->ref
) > 0;
307 void flatview_unref(FlatView
*view
)
309 if (qatomic_fetch_dec(&view
->ref
) == 1) {
310 trace_flatview_destroy_rcu(view
, view
->root
);
312 call_rcu(view
, flatview_destroy
, rcu
);
316 static bool can_merge(FlatRange
*r1
, FlatRange
*r2
)
318 return int128_eq(addrrange_end(r1
->addr
), r2
->addr
.start
)
320 && int128_eq(int128_add(int128_make64(r1
->offset_in_region
),
322 int128_make64(r2
->offset_in_region
))
323 && r1
->dirty_log_mask
== r2
->dirty_log_mask
324 && r1
->romd_mode
== r2
->romd_mode
325 && r1
->readonly
== r2
->readonly
326 && r1
->nonvolatile
== r2
->nonvolatile
;
329 /* Attempt to simplify a view by merging adjacent ranges */
330 static void flatview_simplify(FlatView
*view
)
335 while (i
< view
->nr
) {
338 && can_merge(&view
->ranges
[j
-1], &view
->ranges
[j
])) {
339 int128_addto(&view
->ranges
[i
].addr
.size
, view
->ranges
[j
].addr
.size
);
343 for (k
= i
; k
< j
; k
++) {
344 memory_region_unref(view
->ranges
[k
].mr
);
346 memmove(&view
->ranges
[i
], &view
->ranges
[j
],
347 (view
->nr
- j
) * sizeof(view
->ranges
[j
]));
352 static bool memory_region_big_endian(MemoryRegion
*mr
)
354 #if TARGET_BIG_ENDIAN
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
, MemOp op
)
363 if ((op
& MO_BSWAP
) != devend_memop(mr
->ops
->endianness
)) {
364 switch (op
& MO_SIZE
) {
368 *data
= bswap16(*data
);
371 *data
= bswap32(*data
);
374 *data
= bswap64(*data
);
377 g_assert_not_reached();
382 static inline void memory_region_shift_read_access(uint64_t *value
,
388 *value
|= (tmp
& mask
) << shift
;
390 *value
|= (tmp
& mask
) >> -shift
;
394 static inline uint64_t memory_region_shift_write_access(uint64_t *value
,
401 tmp
= (*value
>> shift
) & mask
;
403 tmp
= (*value
<< -shift
) & mask
;
409 static hwaddr
memory_region_to_absolute_addr(MemoryRegion
*mr
, hwaddr offset
)
412 hwaddr abs_addr
= offset
;
414 abs_addr
+= mr
->addr
;
415 for (root
= mr
; root
->container
; ) {
416 root
= root
->container
;
417 abs_addr
+= root
->addr
;
423 static int get_cpu_index(void)
426 return current_cpu
->cpu_index
;
431 static MemTxResult
memory_region_read_accessor(MemoryRegion
*mr
,
441 tmp
= mr
->ops
->read(mr
->opaque
, addr
, size
);
443 trace_memory_region_subpage_read(get_cpu_index(), mr
, addr
, tmp
, size
);
444 } else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_READ
)) {
445 hwaddr abs_addr
= memory_region_to_absolute_addr(mr
, addr
);
446 trace_memory_region_ops_read(get_cpu_index(), mr
, abs_addr
, tmp
, size
,
447 memory_region_name(mr
));
449 memory_region_shift_read_access(value
, shift
, mask
, tmp
);
453 static MemTxResult
memory_region_read_with_attrs_accessor(MemoryRegion
*mr
,
464 r
= mr
->ops
->read_with_attrs(mr
->opaque
, addr
, &tmp
, size
, attrs
);
466 trace_memory_region_subpage_read(get_cpu_index(), mr
, addr
, tmp
, size
);
467 } else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_READ
)) {
468 hwaddr abs_addr
= memory_region_to_absolute_addr(mr
, addr
);
469 trace_memory_region_ops_read(get_cpu_index(), mr
, abs_addr
, tmp
, size
,
470 memory_region_name(mr
));
472 memory_region_shift_read_access(value
, shift
, mask
, tmp
);
476 static MemTxResult
memory_region_write_accessor(MemoryRegion
*mr
,
484 uint64_t tmp
= memory_region_shift_write_access(value
, shift
, mask
);
487 trace_memory_region_subpage_write(get_cpu_index(), mr
, addr
, tmp
, size
);
488 } else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_WRITE
)) {
489 hwaddr abs_addr
= memory_region_to_absolute_addr(mr
, addr
);
490 trace_memory_region_ops_write(get_cpu_index(), mr
, abs_addr
, tmp
, size
,
491 memory_region_name(mr
));
493 mr
->ops
->write(mr
->opaque
, addr
, tmp
, size
);
497 static MemTxResult
memory_region_write_with_attrs_accessor(MemoryRegion
*mr
,
505 uint64_t tmp
= memory_region_shift_write_access(value
, shift
, mask
);
508 trace_memory_region_subpage_write(get_cpu_index(), mr
, addr
, tmp
, size
);
509 } else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_WRITE
)) {
510 hwaddr abs_addr
= memory_region_to_absolute_addr(mr
, addr
);
511 trace_memory_region_ops_write(get_cpu_index(), mr
, abs_addr
, tmp
, size
,
512 memory_region_name(mr
));
514 return mr
->ops
->write_with_attrs(mr
->opaque
, addr
, tmp
, size
, attrs
);
517 static MemTxResult
access_with_adjusted_size(hwaddr addr
,
520 unsigned access_size_min
,
521 unsigned access_size_max
,
522 MemTxResult (*access_fn
)
533 uint64_t access_mask
;
534 unsigned access_size
;
536 MemTxResult r
= MEMTX_OK
;
537 bool reentrancy_guard_applied
= false;
539 if (!access_size_min
) {
542 if (!access_size_max
) {
546 /* Do not allow more than one simultaneous access to a device's IO Regions */
547 if (mr
->dev
&& !mr
->disable_reentrancy_guard
&&
548 !mr
->ram_device
&& !mr
->ram
&& !mr
->rom_device
&& !mr
->readonly
) {
549 if (mr
->dev
->mem_reentrancy_guard
.engaged_in_io
) {
550 warn_report_once("Blocked re-entrant IO on MemoryRegion: "
551 "%s at addr: 0x%" HWADDR_PRIX
,
552 memory_region_name(mr
), addr
);
553 return MEMTX_ACCESS_ERROR
;
555 mr
->dev
->mem_reentrancy_guard
.engaged_in_io
= true;
556 reentrancy_guard_applied
= true;
559 /* FIXME: support unaligned access? */
560 access_size
= MAX(MIN(size
, access_size_max
), access_size_min
);
561 access_mask
= MAKE_64BIT_MASK(0, access_size
* 8);
562 if (memory_region_big_endian(mr
)) {
563 for (i
= 0; i
< size
; i
+= access_size
) {
564 r
|= access_fn(mr
, addr
+ i
, value
, access_size
,
565 (size
- access_size
- i
) * 8, access_mask
, attrs
);
568 for (i
= 0; i
< size
; i
+= access_size
) {
569 r
|= access_fn(mr
, addr
+ i
, value
, access_size
, i
* 8,
573 if (mr
->dev
&& reentrancy_guard_applied
) {
574 mr
->dev
->mem_reentrancy_guard
.engaged_in_io
= false;
579 static AddressSpace
*memory_region_to_address_space(MemoryRegion
*mr
)
583 while (mr
->container
) {
586 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
587 if (mr
== as
->root
) {
594 /* Render a memory region into the global view. Ranges in @view obscure
597 static void render_memory_region(FlatView
*view
,
604 MemoryRegion
*subregion
;
606 hwaddr offset_in_region
;
616 int128_addto(&base
, int128_make64(mr
->addr
));
617 readonly
|= mr
->readonly
;
618 nonvolatile
|= mr
->nonvolatile
;
620 tmp
= addrrange_make(base
, mr
->size
);
622 if (!addrrange_intersects(tmp
, clip
)) {
626 clip
= addrrange_intersection(tmp
, clip
);
629 int128_subfrom(&base
, int128_make64(mr
->alias
->addr
));
630 int128_subfrom(&base
, int128_make64(mr
->alias_offset
));
631 render_memory_region(view
, mr
->alias
, base
, clip
,
632 readonly
, nonvolatile
);
636 /* Render subregions in priority order. */
637 QTAILQ_FOREACH(subregion
, &mr
->subregions
, subregions_link
) {
638 render_memory_region(view
, subregion
, base
, clip
,
639 readonly
, nonvolatile
);
642 if (!mr
->terminates
) {
646 offset_in_region
= int128_get64(int128_sub(clip
.start
, base
));
651 fr
.dirty_log_mask
= memory_region_get_dirty_log_mask(mr
);
652 fr
.romd_mode
= mr
->romd_mode
;
653 fr
.readonly
= readonly
;
654 fr
.nonvolatile
= nonvolatile
;
656 /* Render the region itself into any gaps left by the current view. */
657 for (i
= 0; i
< view
->nr
&& int128_nz(remain
); ++i
) {
658 if (int128_ge(base
, addrrange_end(view
->ranges
[i
].addr
))) {
661 if (int128_lt(base
, view
->ranges
[i
].addr
.start
)) {
662 now
= int128_min(remain
,
663 int128_sub(view
->ranges
[i
].addr
.start
, base
));
664 fr
.offset_in_region
= offset_in_region
;
665 fr
.addr
= addrrange_make(base
, now
);
666 flatview_insert(view
, i
, &fr
);
668 int128_addto(&base
, now
);
669 offset_in_region
+= int128_get64(now
);
670 int128_subfrom(&remain
, now
);
672 now
= int128_sub(int128_min(int128_add(base
, remain
),
673 addrrange_end(view
->ranges
[i
].addr
)),
675 int128_addto(&base
, now
);
676 offset_in_region
+= int128_get64(now
);
677 int128_subfrom(&remain
, now
);
679 if (int128_nz(remain
)) {
680 fr
.offset_in_region
= offset_in_region
;
681 fr
.addr
= addrrange_make(base
, remain
);
682 flatview_insert(view
, i
, &fr
);
686 void flatview_for_each_range(FlatView
*fv
, flatview_cb cb
, void *opaque
)
693 FOR_EACH_FLAT_RANGE(fr
, fv
) {
694 if (cb(fr
->addr
.start
, fr
->addr
.size
, fr
->mr
,
695 fr
->offset_in_region
, opaque
)) {
701 static MemoryRegion
*memory_region_get_flatview_root(MemoryRegion
*mr
)
703 while (mr
->enabled
) {
705 if (!mr
->alias_offset
&& int128_ge(mr
->size
, mr
->alias
->size
)) {
706 /* The alias is included in its entirety. Use it as
707 * the "real" root, so that we can share more FlatViews.
712 } else if (!mr
->terminates
) {
713 unsigned int found
= 0;
714 MemoryRegion
*child
, *next
= NULL
;
715 QTAILQ_FOREACH(child
, &mr
->subregions
, subregions_link
) {
716 if (child
->enabled
) {
721 if (!child
->addr
&& int128_ge(mr
->size
, child
->size
)) {
722 /* A child is included in its entirety. If it's the only
723 * enabled one, use it in the hope of finding an alias down the
724 * way. This will also let us share FlatViews.
745 /* Render a memory topology into a list of disjoint absolute ranges. */
746 static FlatView
*generate_memory_topology(MemoryRegion
*mr
)
751 view
= flatview_new(mr
);
754 render_memory_region(view
, mr
, int128_zero(),
755 addrrange_make(int128_zero(), int128_2_64()),
758 flatview_simplify(view
);
760 view
->dispatch
= address_space_dispatch_new(view
);
761 for (i
= 0; i
< view
->nr
; i
++) {
762 MemoryRegionSection mrs
=
763 section_from_flat_range(&view
->ranges
[i
], view
);
764 flatview_add_to_dispatch(view
, &mrs
);
766 address_space_dispatch_compact(view
->dispatch
);
767 g_hash_table_replace(flat_views
, mr
, view
);
772 static void address_space_add_del_ioeventfds(AddressSpace
*as
,
773 MemoryRegionIoeventfd
*fds_new
,
775 MemoryRegionIoeventfd
*fds_old
,
779 MemoryRegionIoeventfd
*fd
;
780 MemoryRegionSection section
;
782 /* Generate a symmetric difference of the old and new fd sets, adding
783 * and deleting as necessary.
787 while (iold
< fds_old_nb
|| inew
< fds_new_nb
) {
788 if (iold
< fds_old_nb
789 && (inew
== fds_new_nb
790 || memory_region_ioeventfd_before(&fds_old
[iold
],
793 section
= (MemoryRegionSection
) {
794 .fv
= address_space_to_flatview(as
),
795 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
796 .size
= fd
->addr
.size
,
798 MEMORY_LISTENER_CALL(as
, eventfd_del
, Forward
, §ion
,
799 fd
->match_data
, fd
->data
, fd
->e
);
801 } else if (inew
< fds_new_nb
802 && (iold
== fds_old_nb
803 || memory_region_ioeventfd_before(&fds_new
[inew
],
806 section
= (MemoryRegionSection
) {
807 .fv
= address_space_to_flatview(as
),
808 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
809 .size
= fd
->addr
.size
,
811 MEMORY_LISTENER_CALL(as
, eventfd_add
, Reverse
, §ion
,
812 fd
->match_data
, fd
->data
, fd
->e
);
821 FlatView
*address_space_get_flatview(AddressSpace
*as
)
825 RCU_READ_LOCK_GUARD();
827 view
= address_space_to_flatview(as
);
828 /* If somebody has replaced as->current_map concurrently,
829 * flatview_ref returns false.
831 } while (!flatview_ref(view
));
835 static void address_space_update_ioeventfds(AddressSpace
*as
)
839 unsigned ioeventfd_nb
= 0;
840 unsigned ioeventfd_max
;
841 MemoryRegionIoeventfd
*ioeventfds
;
846 * It is likely that the number of ioeventfds hasn't changed much, so use
847 * the previous size as the starting value, with some headroom to avoid
848 * gratuitous reallocations.
850 ioeventfd_max
= QEMU_ALIGN_UP(as
->ioeventfd_nb
, 4);
851 ioeventfds
= g_new(MemoryRegionIoeventfd
, ioeventfd_max
);
853 view
= address_space_get_flatview(as
);
854 FOR_EACH_FLAT_RANGE(fr
, view
) {
855 for (i
= 0; i
< fr
->mr
->ioeventfd_nb
; ++i
) {
856 tmp
= addrrange_shift(fr
->mr
->ioeventfds
[i
].addr
,
857 int128_sub(fr
->addr
.start
,
858 int128_make64(fr
->offset_in_region
)));
859 if (addrrange_intersects(fr
->addr
, tmp
)) {
861 if (ioeventfd_nb
> ioeventfd_max
) {
862 ioeventfd_max
= MAX(ioeventfd_max
* 2, 4);
863 ioeventfds
= g_realloc(ioeventfds
,
864 ioeventfd_max
* sizeof(*ioeventfds
));
866 ioeventfds
[ioeventfd_nb
-1] = fr
->mr
->ioeventfds
[i
];
867 ioeventfds
[ioeventfd_nb
-1].addr
= tmp
;
872 address_space_add_del_ioeventfds(as
, ioeventfds
, ioeventfd_nb
,
873 as
->ioeventfds
, as
->ioeventfd_nb
);
875 g_free(as
->ioeventfds
);
876 as
->ioeventfds
= ioeventfds
;
877 as
->ioeventfd_nb
= ioeventfd_nb
;
878 flatview_unref(view
);
882 * Notify the memory listeners about the coalesced IO change events of
883 * range `cmr'. Only the part that has intersection of the specified
884 * FlatRange will be sent.
886 static void flat_range_coalesced_io_notify(FlatRange
*fr
, AddressSpace
*as
,
887 CoalescedMemoryRange
*cmr
, bool add
)
891 tmp
= addrrange_shift(cmr
->addr
,
892 int128_sub(fr
->addr
.start
,
893 int128_make64(fr
->offset_in_region
)));
894 if (!addrrange_intersects(tmp
, fr
->addr
)) {
897 tmp
= addrrange_intersection(tmp
, fr
->addr
);
900 MEMORY_LISTENER_UPDATE_REGION(fr
, as
, Forward
, coalesced_io_add
,
901 int128_get64(tmp
.start
),
902 int128_get64(tmp
.size
));
904 MEMORY_LISTENER_UPDATE_REGION(fr
, as
, Reverse
, coalesced_io_del
,
905 int128_get64(tmp
.start
),
906 int128_get64(tmp
.size
));
910 static void flat_range_coalesced_io_del(FlatRange
*fr
, AddressSpace
*as
)
912 CoalescedMemoryRange
*cmr
;
914 QTAILQ_FOREACH(cmr
, &fr
->mr
->coalesced
, link
) {
915 flat_range_coalesced_io_notify(fr
, as
, cmr
, false);
919 static void flat_range_coalesced_io_add(FlatRange
*fr
, AddressSpace
*as
)
921 MemoryRegion
*mr
= fr
->mr
;
922 CoalescedMemoryRange
*cmr
;
924 if (QTAILQ_EMPTY(&mr
->coalesced
)) {
928 QTAILQ_FOREACH(cmr
, &mr
->coalesced
, link
) {
929 flat_range_coalesced_io_notify(fr
, as
, cmr
, true);
933 static void address_space_update_topology_pass(AddressSpace
*as
,
934 const FlatView
*old_view
,
935 const FlatView
*new_view
,
939 FlatRange
*frold
, *frnew
;
941 /* Generate a symmetric difference of the old and new memory maps.
942 * Kill ranges in the old map, and instantiate ranges in the new map.
945 while (iold
< old_view
->nr
|| inew
< new_view
->nr
) {
946 if (iold
< old_view
->nr
) {
947 frold
= &old_view
->ranges
[iold
];
951 if (inew
< new_view
->nr
) {
952 frnew
= &new_view
->ranges
[inew
];
959 || int128_lt(frold
->addr
.start
, frnew
->addr
.start
)
960 || (int128_eq(frold
->addr
.start
, frnew
->addr
.start
)
961 && !flatrange_equal(frold
, frnew
)))) {
962 /* In old but not in new, or in both but attributes changed. */
965 flat_range_coalesced_io_del(frold
, as
);
966 MEMORY_LISTENER_UPDATE_REGION(frold
, as
, Reverse
, region_del
);
970 } else if (frold
&& frnew
&& flatrange_equal(frold
, frnew
)) {
971 /* In both and unchanged (except logging may have changed) */
974 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_nop
);
975 if (frnew
->dirty_log_mask
& ~frold
->dirty_log_mask
) {
976 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, log_start
,
977 frold
->dirty_log_mask
,
978 frnew
->dirty_log_mask
);
980 if (frold
->dirty_log_mask
& ~frnew
->dirty_log_mask
) {
981 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Reverse
, log_stop
,
982 frold
->dirty_log_mask
,
983 frnew
->dirty_log_mask
);
993 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_add
);
994 flat_range_coalesced_io_add(frnew
, as
);
1002 static void flatviews_init(void)
1004 static FlatView
*empty_view
;
1010 flat_views
= g_hash_table_new_full(g_direct_hash
, g_direct_equal
, NULL
,
1011 (GDestroyNotify
) flatview_unref
);
1013 empty_view
= generate_memory_topology(NULL
);
1014 /* We keep it alive forever in the global variable. */
1015 flatview_ref(empty_view
);
1017 g_hash_table_replace(flat_views
, NULL
, empty_view
);
1018 flatview_ref(empty_view
);
1022 static void flatviews_reset(void)
1027 g_hash_table_unref(flat_views
);
1032 /* Render unique FVs */
1033 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1034 MemoryRegion
*physmr
= memory_region_get_flatview_root(as
->root
);
1036 if (g_hash_table_lookup(flat_views
, physmr
)) {
1040 generate_memory_topology(physmr
);
1044 static void address_space_set_flatview(AddressSpace
*as
)
1046 FlatView
*old_view
= address_space_to_flatview(as
);
1047 MemoryRegion
*physmr
= memory_region_get_flatview_root(as
->root
);
1048 FlatView
*new_view
= g_hash_table_lookup(flat_views
, physmr
);
1052 if (old_view
== new_view
) {
1057 flatview_ref(old_view
);
1060 flatview_ref(new_view
);
1062 if (!QTAILQ_EMPTY(&as
->listeners
)) {
1063 FlatView tmpview
= { .nr
= 0 }, *old_view2
= old_view
;
1066 old_view2
= &tmpview
;
1068 address_space_update_topology_pass(as
, old_view2
, new_view
, false);
1069 address_space_update_topology_pass(as
, old_view2
, new_view
, true);
1072 /* Writes are protected by the BQL. */
1073 qatomic_rcu_set(&as
->current_map
, new_view
);
1075 flatview_unref(old_view
);
1078 /* Note that all the old MemoryRegions are still alive up to this
1079 * point. This relieves most MemoryListeners from the need to
1080 * ref/unref the MemoryRegions they get---unless they use them
1081 * outside the iothread mutex, in which case precise reference
1082 * counting is necessary.
1085 flatview_unref(old_view
);
1089 static void address_space_update_topology(AddressSpace
*as
)
1091 MemoryRegion
*physmr
= memory_region_get_flatview_root(as
->root
);
1094 if (!g_hash_table_lookup(flat_views
, physmr
)) {
1095 generate_memory_topology(physmr
);
1097 address_space_set_flatview(as
);
1100 void memory_region_transaction_begin(void)
1102 qemu_flush_coalesced_mmio_buffer();
1103 ++memory_region_transaction_depth
;
1106 void memory_region_transaction_commit(void)
1110 assert(memory_region_transaction_depth
);
1111 assert(qemu_mutex_iothread_locked());
1113 --memory_region_transaction_depth
;
1114 if (!memory_region_transaction_depth
) {
1115 if (memory_region_update_pending
) {
1118 MEMORY_LISTENER_CALL_GLOBAL(begin
, Forward
);
1120 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1121 address_space_set_flatview(as
);
1122 address_space_update_ioeventfds(as
);
1124 memory_region_update_pending
= false;
1125 ioeventfd_update_pending
= false;
1126 MEMORY_LISTENER_CALL_GLOBAL(commit
, Forward
);
1127 } else if (ioeventfd_update_pending
) {
1128 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1129 address_space_update_ioeventfds(as
);
1131 ioeventfd_update_pending
= false;
1136 static void memory_region_destructor_none(MemoryRegion
*mr
)
1140 static void memory_region_destructor_ram(MemoryRegion
*mr
)
1142 qemu_ram_free(mr
->ram_block
);
1145 static bool memory_region_need_escape(char c
)
1147 return c
== '/' || c
== '[' || c
== '\\' || c
== ']';
1150 static char *memory_region_escape_name(const char *name
)
1157 for (p
= name
; *p
; p
++) {
1158 bytes
+= memory_region_need_escape(*p
) ? 4 : 1;
1160 if (bytes
== p
- name
) {
1161 return g_memdup(name
, bytes
+ 1);
1164 escaped
= g_malloc(bytes
+ 1);
1165 for (p
= name
, q
= escaped
; *p
; p
++) {
1167 if (unlikely(memory_region_need_escape(c
))) {
1170 *q
++ = "0123456789abcdef"[c
>> 4];
1171 c
= "0123456789abcdef"[c
& 15];
1179 static void memory_region_do_init(MemoryRegion
*mr
,
1184 mr
->size
= int128_make64(size
);
1185 if (size
== UINT64_MAX
) {
1186 mr
->size
= int128_2_64();
1188 mr
->name
= g_strdup(name
);
1190 mr
->dev
= (DeviceState
*) object_dynamic_cast(mr
->owner
, TYPE_DEVICE
);
1191 mr
->ram_block
= NULL
;
1194 char *escaped_name
= memory_region_escape_name(name
);
1195 char *name_array
= g_strdup_printf("%s[*]", escaped_name
);
1198 owner
= container_get(qdev_get_machine(), "/unattached");
1201 object_property_add_child(owner
, name_array
, OBJECT(mr
));
1202 object_unref(OBJECT(mr
));
1204 g_free(escaped_name
);
1208 void memory_region_init(MemoryRegion
*mr
,
1213 object_initialize(mr
, sizeof(*mr
), TYPE_MEMORY_REGION
);
1214 memory_region_do_init(mr
, owner
, name
, size
);
1217 static void memory_region_get_container(Object
*obj
, Visitor
*v
,
1218 const char *name
, void *opaque
,
1221 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1222 char *path
= (char *)"";
1224 if (mr
->container
) {
1225 path
= object_get_canonical_path(OBJECT(mr
->container
));
1227 visit_type_str(v
, name
, &path
, errp
);
1228 if (mr
->container
) {
1233 static Object
*memory_region_resolve_container(Object
*obj
, void *opaque
,
1236 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1238 return OBJECT(mr
->container
);
1241 static void memory_region_get_priority(Object
*obj
, Visitor
*v
,
1242 const char *name
, void *opaque
,
1245 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1246 int32_t value
= mr
->priority
;
1248 visit_type_int32(v
, name
, &value
, errp
);
1251 static void memory_region_get_size(Object
*obj
, Visitor
*v
, const char *name
,
1252 void *opaque
, Error
**errp
)
1254 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1255 uint64_t value
= memory_region_size(mr
);
1257 visit_type_uint64(v
, name
, &value
, errp
);
1260 static void memory_region_initfn(Object
*obj
)
1262 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1265 mr
->ops
= &unassigned_mem_ops
;
1267 mr
->romd_mode
= true;
1268 mr
->destructor
= memory_region_destructor_none
;
1269 QTAILQ_INIT(&mr
->subregions
);
1270 QTAILQ_INIT(&mr
->coalesced
);
1272 op
= object_property_add(OBJECT(mr
), "container",
1273 "link<" TYPE_MEMORY_REGION
">",
1274 memory_region_get_container
,
1275 NULL
, /* memory_region_set_container */
1277 op
->resolve
= memory_region_resolve_container
;
1279 object_property_add_uint64_ptr(OBJECT(mr
), "addr",
1280 &mr
->addr
, OBJ_PROP_FLAG_READ
);
1281 object_property_add(OBJECT(mr
), "priority", "uint32",
1282 memory_region_get_priority
,
1283 NULL
, /* memory_region_set_priority */
1285 object_property_add(OBJECT(mr
), "size", "uint64",
1286 memory_region_get_size
,
1287 NULL
, /* memory_region_set_size, */
1291 static void iommu_memory_region_initfn(Object
*obj
)
1293 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1295 mr
->is_iommu
= true;
1298 static uint64_t unassigned_mem_read(void *opaque
, hwaddr addr
,
1301 #ifdef DEBUG_UNASSIGNED
1302 printf("Unassigned mem read " HWADDR_FMT_plx
"\n", addr
);
1307 static void unassigned_mem_write(void *opaque
, hwaddr addr
,
1308 uint64_t val
, unsigned size
)
1310 #ifdef DEBUG_UNASSIGNED
1311 printf("Unassigned mem write " HWADDR_FMT_plx
" = 0x%"PRIx64
"\n", addr
, val
);
1315 static bool unassigned_mem_accepts(void *opaque
, hwaddr addr
,
1316 unsigned size
, bool is_write
,
1322 const MemoryRegionOps unassigned_mem_ops
= {
1323 .valid
.accepts
= unassigned_mem_accepts
,
1324 .endianness
= DEVICE_NATIVE_ENDIAN
,
1327 static uint64_t memory_region_ram_device_read(void *opaque
,
1328 hwaddr addr
, unsigned size
)
1330 MemoryRegion
*mr
= opaque
;
1331 uint64_t data
= (uint64_t)~0;
1335 data
= *(uint8_t *)(mr
->ram_block
->host
+ addr
);
1338 data
= *(uint16_t *)(mr
->ram_block
->host
+ addr
);
1341 data
= *(uint32_t *)(mr
->ram_block
->host
+ addr
);
1344 data
= *(uint64_t *)(mr
->ram_block
->host
+ addr
);
1348 trace_memory_region_ram_device_read(get_cpu_index(), mr
, addr
, data
, size
);
1353 static void memory_region_ram_device_write(void *opaque
, hwaddr addr
,
1354 uint64_t data
, unsigned size
)
1356 MemoryRegion
*mr
= opaque
;
1358 trace_memory_region_ram_device_write(get_cpu_index(), mr
, addr
, data
, size
);
1362 *(uint8_t *)(mr
->ram_block
->host
+ addr
) = (uint8_t)data
;
1365 *(uint16_t *)(mr
->ram_block
->host
+ addr
) = (uint16_t)data
;
1368 *(uint32_t *)(mr
->ram_block
->host
+ addr
) = (uint32_t)data
;
1371 *(uint64_t *)(mr
->ram_block
->host
+ addr
) = data
;
1376 static const MemoryRegionOps ram_device_mem_ops
= {
1377 .read
= memory_region_ram_device_read
,
1378 .write
= memory_region_ram_device_write
,
1379 .endianness
= DEVICE_HOST_ENDIAN
,
1381 .min_access_size
= 1,
1382 .max_access_size
= 8,
1386 .min_access_size
= 1,
1387 .max_access_size
= 8,
1392 bool memory_region_access_valid(MemoryRegion
*mr
,
1398 if (mr
->ops
->valid
.accepts
1399 && !mr
->ops
->valid
.accepts(mr
->opaque
, addr
, size
, is_write
, attrs
)) {
1400 qemu_log_mask(LOG_GUEST_ERROR
, "Invalid %s at addr 0x%" HWADDR_PRIX
1401 ", size %u, region '%s', reason: rejected\n",
1402 is_write
? "write" : "read",
1403 addr
, size
, memory_region_name(mr
));
1407 if (!mr
->ops
->valid
.unaligned
&& (addr
& (size
- 1))) {
1408 qemu_log_mask(LOG_GUEST_ERROR
, "Invalid %s at addr 0x%" HWADDR_PRIX
1409 ", size %u, region '%s', reason: unaligned\n",
1410 is_write
? "write" : "read",
1411 addr
, size
, memory_region_name(mr
));
1415 /* Treat zero as compatibility all valid */
1416 if (!mr
->ops
->valid
.max_access_size
) {
1420 if (size
> mr
->ops
->valid
.max_access_size
1421 || size
< mr
->ops
->valid
.min_access_size
) {
1422 qemu_log_mask(LOG_GUEST_ERROR
, "Invalid %s at addr 0x%" HWADDR_PRIX
1423 ", size %u, region '%s', reason: invalid size "
1424 "(min:%u max:%u)\n",
1425 is_write
? "write" : "read",
1426 addr
, size
, memory_region_name(mr
),
1427 mr
->ops
->valid
.min_access_size
,
1428 mr
->ops
->valid
.max_access_size
);
1434 static MemTxResult
memory_region_dispatch_read1(MemoryRegion
*mr
,
1442 if (mr
->ops
->read
) {
1443 return access_with_adjusted_size(addr
, pval
, size
,
1444 mr
->ops
->impl
.min_access_size
,
1445 mr
->ops
->impl
.max_access_size
,
1446 memory_region_read_accessor
,
1449 return access_with_adjusted_size(addr
, pval
, size
,
1450 mr
->ops
->impl
.min_access_size
,
1451 mr
->ops
->impl
.max_access_size
,
1452 memory_region_read_with_attrs_accessor
,
1457 MemTxResult
memory_region_dispatch_read(MemoryRegion
*mr
,
1463 unsigned size
= memop_size(op
);
1467 return memory_region_dispatch_read(mr
->alias
,
1468 mr
->alias_offset
+ addr
,
1471 if (!memory_region_access_valid(mr
, addr
, size
, false, attrs
)) {
1472 *pval
= unassigned_mem_read(mr
, addr
, size
);
1473 return MEMTX_DECODE_ERROR
;
1476 r
= memory_region_dispatch_read1(mr
, addr
, pval
, size
, attrs
);
1477 adjust_endianness(mr
, pval
, op
);
1481 /* Return true if an eventfd was signalled */
1482 static bool memory_region_dispatch_write_eventfds(MemoryRegion
*mr
,
1488 MemoryRegionIoeventfd ioeventfd
= {
1489 .addr
= addrrange_make(int128_make64(addr
), int128_make64(size
)),
1494 for (i
= 0; i
< mr
->ioeventfd_nb
; i
++) {
1495 ioeventfd
.match_data
= mr
->ioeventfds
[i
].match_data
;
1496 ioeventfd
.e
= mr
->ioeventfds
[i
].e
;
1498 if (memory_region_ioeventfd_equal(&ioeventfd
, &mr
->ioeventfds
[i
])) {
1499 event_notifier_set(ioeventfd
.e
);
1507 MemTxResult
memory_region_dispatch_write(MemoryRegion
*mr
,
1513 unsigned size
= memop_size(op
);
1516 return memory_region_dispatch_write(mr
->alias
,
1517 mr
->alias_offset
+ addr
,
1520 if (!memory_region_access_valid(mr
, addr
, size
, true, attrs
)) {
1521 unassigned_mem_write(mr
, addr
, data
, size
);
1522 return MEMTX_DECODE_ERROR
;
1525 adjust_endianness(mr
, &data
, op
);
1527 if ((!kvm_eventfds_enabled()) &&
1528 memory_region_dispatch_write_eventfds(mr
, addr
, data
, size
, attrs
)) {
1532 if (mr
->ops
->write
) {
1533 return access_with_adjusted_size(addr
, &data
, size
,
1534 mr
->ops
->impl
.min_access_size
,
1535 mr
->ops
->impl
.max_access_size
,
1536 memory_region_write_accessor
, mr
,
1540 access_with_adjusted_size(addr
, &data
, size
,
1541 mr
->ops
->impl
.min_access_size
,
1542 mr
->ops
->impl
.max_access_size
,
1543 memory_region_write_with_attrs_accessor
,
1548 void memory_region_init_io(MemoryRegion
*mr
,
1550 const MemoryRegionOps
*ops
,
1555 memory_region_init(mr
, owner
, name
, size
);
1556 mr
->ops
= ops
? ops
: &unassigned_mem_ops
;
1557 mr
->opaque
= opaque
;
1558 mr
->terminates
= true;
1561 void memory_region_init_ram_nomigrate(MemoryRegion
*mr
,
1567 memory_region_init_ram_flags_nomigrate(mr
, owner
, name
, size
, 0, errp
);
1570 void memory_region_init_ram_flags_nomigrate(MemoryRegion
*mr
,
1578 memory_region_init(mr
, owner
, name
, size
);
1580 mr
->terminates
= true;
1581 mr
->destructor
= memory_region_destructor_ram
;
1582 mr
->ram_block
= qemu_ram_alloc(size
, ram_flags
, mr
, &err
);
1584 mr
->size
= int128_zero();
1585 object_unparent(OBJECT(mr
));
1586 error_propagate(errp
, err
);
1590 void memory_region_init_resizeable_ram(MemoryRegion
*mr
,
1595 void (*resized
)(const char*,
1601 memory_region_init(mr
, owner
, name
, size
);
1603 mr
->terminates
= true;
1604 mr
->destructor
= memory_region_destructor_ram
;
1605 mr
->ram_block
= qemu_ram_alloc_resizeable(size
, max_size
, resized
,
1608 mr
->size
= int128_zero();
1609 object_unparent(OBJECT(mr
));
1610 error_propagate(errp
, err
);
1615 void memory_region_init_ram_from_file(MemoryRegion
*mr
,
1626 memory_region_init(mr
, owner
, name
, size
);
1628 mr
->readonly
= readonly
;
1629 mr
->terminates
= true;
1630 mr
->destructor
= memory_region_destructor_ram
;
1632 mr
->ram_block
= qemu_ram_alloc_from_file(size
, mr
, ram_flags
, path
,
1635 mr
->size
= int128_zero();
1636 object_unparent(OBJECT(mr
));
1637 error_propagate(errp
, err
);
1641 void memory_region_init_ram_from_fd(MemoryRegion
*mr
,
1651 memory_region_init(mr
, owner
, name
, size
);
1653 mr
->terminates
= true;
1654 mr
->destructor
= memory_region_destructor_ram
;
1655 mr
->ram_block
= qemu_ram_alloc_from_fd(size
, mr
, ram_flags
, fd
, offset
,
1658 mr
->size
= int128_zero();
1659 object_unparent(OBJECT(mr
));
1660 error_propagate(errp
, err
);
1665 void memory_region_init_ram_ptr(MemoryRegion
*mr
,
1671 memory_region_init(mr
, owner
, name
, size
);
1673 mr
->terminates
= true;
1674 mr
->destructor
= memory_region_destructor_ram
;
1676 /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
1677 assert(ptr
!= NULL
);
1678 mr
->ram_block
= qemu_ram_alloc_from_ptr(size
, ptr
, mr
, &error_fatal
);
1681 void memory_region_init_ram_device_ptr(MemoryRegion
*mr
,
1687 memory_region_init(mr
, owner
, name
, size
);
1689 mr
->terminates
= true;
1690 mr
->ram_device
= true;
1691 mr
->ops
= &ram_device_mem_ops
;
1693 mr
->destructor
= memory_region_destructor_ram
;
1695 /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
1696 assert(ptr
!= NULL
);
1697 mr
->ram_block
= qemu_ram_alloc_from_ptr(size
, ptr
, mr
, &error_fatal
);
1700 void memory_region_init_alias(MemoryRegion
*mr
,
1707 memory_region_init(mr
, owner
, name
, size
);
1709 mr
->alias_offset
= offset
;
1712 void memory_region_init_rom_nomigrate(MemoryRegion
*mr
,
1718 memory_region_init_ram_flags_nomigrate(mr
, owner
, name
, size
, 0, errp
);
1719 mr
->readonly
= true;
1722 void memory_region_init_rom_device_nomigrate(MemoryRegion
*mr
,
1724 const MemoryRegionOps
*ops
,
1732 memory_region_init(mr
, owner
, name
, size
);
1734 mr
->opaque
= opaque
;
1735 mr
->terminates
= true;
1736 mr
->rom_device
= true;
1737 mr
->destructor
= memory_region_destructor_ram
;
1738 mr
->ram_block
= qemu_ram_alloc(size
, 0, mr
, &err
);
1740 mr
->size
= int128_zero();
1741 object_unparent(OBJECT(mr
));
1742 error_propagate(errp
, err
);
1746 void memory_region_init_iommu(void *_iommu_mr
,
1747 size_t instance_size
,
1748 const char *mrtypename
,
1753 struct IOMMUMemoryRegion
*iommu_mr
;
1754 struct MemoryRegion
*mr
;
1756 object_initialize(_iommu_mr
, instance_size
, mrtypename
);
1757 mr
= MEMORY_REGION(_iommu_mr
);
1758 memory_region_do_init(mr
, owner
, name
, size
);
1759 iommu_mr
= IOMMU_MEMORY_REGION(mr
);
1760 mr
->terminates
= true; /* then re-forwards */
1761 QLIST_INIT(&iommu_mr
->iommu_notify
);
1762 iommu_mr
->iommu_notify_flags
= IOMMU_NOTIFIER_NONE
;
1765 static void memory_region_finalize(Object
*obj
)
1767 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1769 assert(!mr
->container
);
1771 /* We know the region is not visible in any address space (it
1772 * does not have a container and cannot be a root either because
1773 * it has no references, so we can blindly clear mr->enabled.
1774 * memory_region_set_enabled instead could trigger a transaction
1775 * and cause an infinite loop.
1777 mr
->enabled
= false;
1778 memory_region_transaction_begin();
1779 while (!QTAILQ_EMPTY(&mr
->subregions
)) {
1780 MemoryRegion
*subregion
= QTAILQ_FIRST(&mr
->subregions
);
1781 memory_region_del_subregion(mr
, subregion
);
1783 memory_region_transaction_commit();
1786 memory_region_clear_coalescing(mr
);
1787 g_free((char *)mr
->name
);
1788 g_free(mr
->ioeventfds
);
1791 Object
*memory_region_owner(MemoryRegion
*mr
)
1793 Object
*obj
= OBJECT(mr
);
1797 void memory_region_ref(MemoryRegion
*mr
)
1799 /* MMIO callbacks most likely will access data that belongs
1800 * to the owner, hence the need to ref/unref the owner whenever
1801 * the memory region is in use.
1803 * The memory region is a child of its owner. As long as the
1804 * owner doesn't call unparent itself on the memory region,
1805 * ref-ing the owner will also keep the memory region alive.
1806 * Memory regions without an owner are supposed to never go away;
1807 * we do not ref/unref them because it slows down DMA sensibly.
1809 if (mr
&& mr
->owner
) {
1810 object_ref(mr
->owner
);
1814 void memory_region_unref(MemoryRegion
*mr
)
1816 if (mr
&& mr
->owner
) {
1817 object_unref(mr
->owner
);
1821 uint64_t memory_region_size(MemoryRegion
*mr
)
1823 if (int128_eq(mr
->size
, int128_2_64())) {
1826 return int128_get64(mr
->size
);
1829 const char *memory_region_name(const MemoryRegion
*mr
)
1832 ((MemoryRegion
*)mr
)->name
=
1833 g_strdup(object_get_canonical_path_component(OBJECT(mr
)));
1838 bool memory_region_is_ram_device(MemoryRegion
*mr
)
1840 return mr
->ram_device
;
1843 bool memory_region_is_protected(MemoryRegion
*mr
)
1845 return mr
->ram
&& (mr
->ram_block
->flags
& RAM_PROTECTED
);
1848 uint8_t memory_region_get_dirty_log_mask(MemoryRegion
*mr
)
1850 uint8_t mask
= mr
->dirty_log_mask
;
1851 RAMBlock
*rb
= mr
->ram_block
;
1853 if (global_dirty_tracking
&& ((rb
&& qemu_ram_is_migratable(rb
)) ||
1854 memory_region_is_iommu(mr
))) {
1855 mask
|= (1 << DIRTY_MEMORY_MIGRATION
);
1858 if (tcg_enabled() && rb
) {
1859 /* TCG only cares about dirty memory logging for RAM, not IOMMU. */
1860 mask
|= (1 << DIRTY_MEMORY_CODE
);
1865 bool memory_region_is_logging(MemoryRegion
*mr
, uint8_t client
)
1867 return memory_region_get_dirty_log_mask(mr
) & (1 << client
);
1870 static int memory_region_update_iommu_notify_flags(IOMMUMemoryRegion
*iommu_mr
,
1873 IOMMUNotifierFlag flags
= IOMMU_NOTIFIER_NONE
;
1874 IOMMUNotifier
*iommu_notifier
;
1875 IOMMUMemoryRegionClass
*imrc
= IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr
);
1878 IOMMU_NOTIFIER_FOREACH(iommu_notifier
, iommu_mr
) {
1879 flags
|= iommu_notifier
->notifier_flags
;
1882 if (flags
!= iommu_mr
->iommu_notify_flags
&& imrc
->notify_flag_changed
) {
1883 ret
= imrc
->notify_flag_changed(iommu_mr
,
1884 iommu_mr
->iommu_notify_flags
,
1889 iommu_mr
->iommu_notify_flags
= flags
;
1894 int memory_region_iommu_set_page_size_mask(IOMMUMemoryRegion
*iommu_mr
,
1895 uint64_t page_size_mask
,
1898 IOMMUMemoryRegionClass
*imrc
= IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr
);
1901 if (imrc
->iommu_set_page_size_mask
) {
1902 ret
= imrc
->iommu_set_page_size_mask(iommu_mr
, page_size_mask
, errp
);
1907 int memory_region_register_iommu_notifier(MemoryRegion
*mr
,
1908 IOMMUNotifier
*n
, Error
**errp
)
1910 IOMMUMemoryRegion
*iommu_mr
;
1914 return memory_region_register_iommu_notifier(mr
->alias
, n
, errp
);
1917 /* We need to register for at least one bitfield */
1918 iommu_mr
= IOMMU_MEMORY_REGION(mr
);
1919 assert(n
->notifier_flags
!= IOMMU_NOTIFIER_NONE
);
1920 assert(n
->start
<= n
->end
);
1921 assert(n
->iommu_idx
>= 0 &&
1922 n
->iommu_idx
< memory_region_iommu_num_indexes(iommu_mr
));
1924 QLIST_INSERT_HEAD(&iommu_mr
->iommu_notify
, n
, node
);
1925 ret
= memory_region_update_iommu_notify_flags(iommu_mr
, errp
);
1927 QLIST_REMOVE(n
, node
);
1932 uint64_t memory_region_iommu_get_min_page_size(IOMMUMemoryRegion
*iommu_mr
)
1934 IOMMUMemoryRegionClass
*imrc
= IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr
);
1936 if (imrc
->get_min_page_size
) {
1937 return imrc
->get_min_page_size(iommu_mr
);
1939 return TARGET_PAGE_SIZE
;
1942 void memory_region_iommu_replay(IOMMUMemoryRegion
*iommu_mr
, IOMMUNotifier
*n
)
1944 MemoryRegion
*mr
= MEMORY_REGION(iommu_mr
);
1945 IOMMUMemoryRegionClass
*imrc
= IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr
);
1946 hwaddr addr
, granularity
;
1947 IOMMUTLBEntry iotlb
;
1949 /* If the IOMMU has its own replay callback, override */
1951 imrc
->replay(iommu_mr
, n
);
1955 granularity
= memory_region_iommu_get_min_page_size(iommu_mr
);
1957 for (addr
= 0; addr
< memory_region_size(mr
); addr
+= granularity
) {
1958 iotlb
= imrc
->translate(iommu_mr
, addr
, IOMMU_NONE
, n
->iommu_idx
);
1959 if (iotlb
.perm
!= IOMMU_NONE
) {
1960 n
->notify(n
, &iotlb
);
1963 /* if (2^64 - MR size) < granularity, it's possible to get an
1964 * infinite loop here. This should catch such a wraparound */
1965 if ((addr
+ granularity
) < addr
) {
1971 void memory_region_unregister_iommu_notifier(MemoryRegion
*mr
,
1974 IOMMUMemoryRegion
*iommu_mr
;
1977 memory_region_unregister_iommu_notifier(mr
->alias
, n
);
1980 QLIST_REMOVE(n
, node
);
1981 iommu_mr
= IOMMU_MEMORY_REGION(mr
);
1982 memory_region_update_iommu_notify_flags(iommu_mr
, NULL
);
1985 void memory_region_notify_iommu_one(IOMMUNotifier
*notifier
,
1986 IOMMUTLBEvent
*event
)
1988 IOMMUTLBEntry
*entry
= &event
->entry
;
1989 hwaddr entry_end
= entry
->iova
+ entry
->addr_mask
;
1990 IOMMUTLBEntry tmp
= *entry
;
1992 if (event
->type
== IOMMU_NOTIFIER_UNMAP
) {
1993 assert(entry
->perm
== IOMMU_NONE
);
1997 * Skip the notification if the notification does not overlap
1998 * with registered range.
2000 if (notifier
->start
> entry_end
|| notifier
->end
< entry
->iova
) {
2004 if (notifier
->notifier_flags
& IOMMU_NOTIFIER_DEVIOTLB_UNMAP
) {
2005 /* Crop (iova, addr_mask) to range */
2006 tmp
.iova
= MAX(tmp
.iova
, notifier
->start
);
2007 tmp
.addr_mask
= MIN(entry_end
, notifier
->end
) - tmp
.iova
;
2009 assert(entry
->iova
>= notifier
->start
&& entry_end
<= notifier
->end
);
2012 if (event
->type
& notifier
->notifier_flags
) {
2013 notifier
->notify(notifier
, &tmp
);
2017 void memory_region_unmap_iommu_notifier_range(IOMMUNotifier
*notifier
)
2019 IOMMUTLBEvent event
;
2021 event
.type
= IOMMU_NOTIFIER_UNMAP
;
2022 event
.entry
.target_as
= &address_space_memory
;
2023 event
.entry
.iova
= notifier
->start
;
2024 event
.entry
.perm
= IOMMU_NONE
;
2025 event
.entry
.addr_mask
= notifier
->end
- notifier
->start
;
2027 memory_region_notify_iommu_one(notifier
, &event
);
2030 void memory_region_notify_iommu(IOMMUMemoryRegion
*iommu_mr
,
2032 IOMMUTLBEvent event
)
2034 IOMMUNotifier
*iommu_notifier
;
2036 assert(memory_region_is_iommu(MEMORY_REGION(iommu_mr
)));
2038 IOMMU_NOTIFIER_FOREACH(iommu_notifier
, iommu_mr
) {
2039 if (iommu_notifier
->iommu_idx
== iommu_idx
) {
2040 memory_region_notify_iommu_one(iommu_notifier
, &event
);
2045 int memory_region_iommu_get_attr(IOMMUMemoryRegion
*iommu_mr
,
2046 enum IOMMUMemoryRegionAttr attr
,
2049 IOMMUMemoryRegionClass
*imrc
= IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr
);
2051 if (!imrc
->get_attr
) {
2055 return imrc
->get_attr(iommu_mr
, attr
, data
);
2058 int memory_region_iommu_attrs_to_index(IOMMUMemoryRegion
*iommu_mr
,
2061 IOMMUMemoryRegionClass
*imrc
= IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr
);
2063 if (!imrc
->attrs_to_index
) {
2067 return imrc
->attrs_to_index(iommu_mr
, attrs
);
2070 int memory_region_iommu_num_indexes(IOMMUMemoryRegion
*iommu_mr
)
2072 IOMMUMemoryRegionClass
*imrc
= IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr
);
2074 if (!imrc
->num_indexes
) {
2078 return imrc
->num_indexes(iommu_mr
);
2081 RamDiscardManager
*memory_region_get_ram_discard_manager(MemoryRegion
*mr
)
2083 if (!memory_region_is_mapped(mr
) || !memory_region_is_ram(mr
)) {
2089 void memory_region_set_ram_discard_manager(MemoryRegion
*mr
,
2090 RamDiscardManager
*rdm
)
2092 g_assert(memory_region_is_ram(mr
) && !memory_region_is_mapped(mr
));
2093 g_assert(!rdm
|| !mr
->rdm
);
2097 uint64_t ram_discard_manager_get_min_granularity(const RamDiscardManager
*rdm
,
2098 const MemoryRegion
*mr
)
2100 RamDiscardManagerClass
*rdmc
= RAM_DISCARD_MANAGER_GET_CLASS(rdm
);
2102 g_assert(rdmc
->get_min_granularity
);
2103 return rdmc
->get_min_granularity(rdm
, mr
);
2106 bool ram_discard_manager_is_populated(const RamDiscardManager
*rdm
,
2107 const MemoryRegionSection
*section
)
2109 RamDiscardManagerClass
*rdmc
= RAM_DISCARD_MANAGER_GET_CLASS(rdm
);
2111 g_assert(rdmc
->is_populated
);
2112 return rdmc
->is_populated(rdm
, section
);
2115 int ram_discard_manager_replay_populated(const RamDiscardManager
*rdm
,
2116 MemoryRegionSection
*section
,
2117 ReplayRamPopulate replay_fn
,
2120 RamDiscardManagerClass
*rdmc
= RAM_DISCARD_MANAGER_GET_CLASS(rdm
);
2122 g_assert(rdmc
->replay_populated
);
2123 return rdmc
->replay_populated(rdm
, section
, replay_fn
, opaque
);
2126 void ram_discard_manager_replay_discarded(const RamDiscardManager
*rdm
,
2127 MemoryRegionSection
*section
,
2128 ReplayRamDiscard replay_fn
,
2131 RamDiscardManagerClass
*rdmc
= RAM_DISCARD_MANAGER_GET_CLASS(rdm
);
2133 g_assert(rdmc
->replay_discarded
);
2134 rdmc
->replay_discarded(rdm
, section
, replay_fn
, opaque
);
2137 void ram_discard_manager_register_listener(RamDiscardManager
*rdm
,
2138 RamDiscardListener
*rdl
,
2139 MemoryRegionSection
*section
)
2141 RamDiscardManagerClass
*rdmc
= RAM_DISCARD_MANAGER_GET_CLASS(rdm
);
2143 g_assert(rdmc
->register_listener
);
2144 rdmc
->register_listener(rdm
, rdl
, section
);
2147 void ram_discard_manager_unregister_listener(RamDiscardManager
*rdm
,
2148 RamDiscardListener
*rdl
)
2150 RamDiscardManagerClass
*rdmc
= RAM_DISCARD_MANAGER_GET_CLASS(rdm
);
2152 g_assert(rdmc
->unregister_listener
);
2153 rdmc
->unregister_listener(rdm
, rdl
);
2156 /* Called with rcu_read_lock held. */
2157 bool memory_get_xlat_addr(IOMMUTLBEntry
*iotlb
, void **vaddr
,
2158 ram_addr_t
*ram_addr
, bool *read_only
,
2159 bool *mr_has_discard_manager
)
2163 hwaddr len
= iotlb
->addr_mask
+ 1;
2164 bool writable
= iotlb
->perm
& IOMMU_WO
;
2166 if (mr_has_discard_manager
) {
2167 *mr_has_discard_manager
= false;
2170 * The IOMMU TLB entry we have just covers translation through
2171 * this IOMMU to its immediate target. We need to translate
2172 * it the rest of the way through to memory.
2174 mr
= address_space_translate(&address_space_memory
, iotlb
->translated_addr
,
2175 &xlat
, &len
, writable
, MEMTXATTRS_UNSPECIFIED
);
2176 if (!memory_region_is_ram(mr
)) {
2177 error_report("iommu map to non memory area %" HWADDR_PRIx
"", xlat
);
2179 } else if (memory_region_has_ram_discard_manager(mr
)) {
2180 RamDiscardManager
*rdm
= memory_region_get_ram_discard_manager(mr
);
2181 MemoryRegionSection tmp
= {
2183 .offset_within_region
= xlat
,
2184 .size
= int128_make64(len
),
2186 if (mr_has_discard_manager
) {
2187 *mr_has_discard_manager
= true;
2190 * Malicious VMs can map memory into the IOMMU, which is expected
2191 * to remain discarded. vfio will pin all pages, populating memory.
2192 * Disallow that. vmstate priorities make sure any RamDiscardManager
2193 * were already restored before IOMMUs are restored.
2195 if (!ram_discard_manager_is_populated(rdm
, &tmp
)) {
2196 error_report("iommu map to discarded memory (e.g., unplugged via"
2197 " virtio-mem): %" HWADDR_PRIx
"",
2198 iotlb
->translated_addr
);
2204 * Translation truncates length to the IOMMU page size,
2205 * check that it did not truncate too much.
2207 if (len
& iotlb
->addr_mask
) {
2208 error_report("iommu has granularity incompatible with target AS");
2213 *vaddr
= memory_region_get_ram_ptr(mr
) + xlat
;
2217 *ram_addr
= memory_region_get_ram_addr(mr
) + xlat
;
2221 *read_only
= !writable
|| mr
->readonly
;
2227 void memory_region_set_log(MemoryRegion
*mr
, bool log
, unsigned client
)
2229 uint8_t mask
= 1 << client
;
2230 uint8_t old_logging
;
2232 assert(client
== DIRTY_MEMORY_VGA
);
2233 old_logging
= mr
->vga_logging_count
;
2234 mr
->vga_logging_count
+= log
? 1 : -1;
2235 if (!!old_logging
== !!mr
->vga_logging_count
) {
2239 memory_region_transaction_begin();
2240 mr
->dirty_log_mask
= (mr
->dirty_log_mask
& ~mask
) | (log
* mask
);
2241 memory_region_update_pending
|= mr
->enabled
;
2242 memory_region_transaction_commit();
2245 void memory_region_set_dirty(MemoryRegion
*mr
, hwaddr addr
,
2248 assert(mr
->ram_block
);
2249 cpu_physical_memory_set_dirty_range(memory_region_get_ram_addr(mr
) + addr
,
2251 memory_region_get_dirty_log_mask(mr
));
2255 * If memory region `mr' is NULL, do global sync. Otherwise, sync
2256 * dirty bitmap for the specified memory region.
2258 static void memory_region_sync_dirty_bitmap(MemoryRegion
*mr
, bool last_stage
)
2260 MemoryListener
*listener
;
2265 /* If the same address space has multiple log_sync listeners, we
2266 * visit that address space's FlatView multiple times. But because
2267 * log_sync listeners are rare, it's still cheaper than walking each
2268 * address space once.
2270 QTAILQ_FOREACH(listener
, &memory_listeners
, link
) {
2271 if (listener
->log_sync
) {
2272 as
= listener
->address_space
;
2273 view
= address_space_get_flatview(as
);
2274 FOR_EACH_FLAT_RANGE(fr
, view
) {
2275 if (fr
->dirty_log_mask
&& (!mr
|| fr
->mr
== mr
)) {
2276 MemoryRegionSection mrs
= section_from_flat_range(fr
, view
);
2277 listener
->log_sync(listener
, &mrs
);
2280 flatview_unref(view
);
2281 trace_memory_region_sync_dirty(mr
? mr
->name
: "(all)", listener
->name
, 0);
2282 } else if (listener
->log_sync_global
) {
2284 * No matter whether MR is specified, what we can do here
2285 * is to do a global sync, because we are not capable to
2286 * sync in a finer granularity.
2288 listener
->log_sync_global(listener
, last_stage
);
2289 trace_memory_region_sync_dirty(mr
? mr
->name
: "(all)", listener
->name
, 1);
2294 void memory_region_clear_dirty_bitmap(MemoryRegion
*mr
, hwaddr start
,
2297 MemoryRegionSection mrs
;
2298 MemoryListener
*listener
;
2302 hwaddr sec_start
, sec_end
, sec_size
;
2304 QTAILQ_FOREACH(listener
, &memory_listeners
, link
) {
2305 if (!listener
->log_clear
) {
2308 as
= listener
->address_space
;
2309 view
= address_space_get_flatview(as
);
2310 FOR_EACH_FLAT_RANGE(fr
, view
) {
2311 if (!fr
->dirty_log_mask
|| fr
->mr
!= mr
) {
2313 * Clear dirty bitmap operation only applies to those
2314 * regions whose dirty logging is at least enabled
2319 mrs
= section_from_flat_range(fr
, view
);
2321 sec_start
= MAX(mrs
.offset_within_region
, start
);
2322 sec_end
= mrs
.offset_within_region
+ int128_get64(mrs
.size
);
2323 sec_end
= MIN(sec_end
, start
+ len
);
2325 if (sec_start
>= sec_end
) {
2327 * If this memory region section has no intersection
2328 * with the requested range, skip.
2333 /* Valid case; shrink the section if needed */
2334 mrs
.offset_within_address_space
+=
2335 sec_start
- mrs
.offset_within_region
;
2336 mrs
.offset_within_region
= sec_start
;
2337 sec_size
= sec_end
- sec_start
;
2338 mrs
.size
= int128_make64(sec_size
);
2339 listener
->log_clear(listener
, &mrs
);
2341 flatview_unref(view
);
2345 DirtyBitmapSnapshot
*memory_region_snapshot_and_clear_dirty(MemoryRegion
*mr
,
2350 DirtyBitmapSnapshot
*snapshot
;
2351 assert(mr
->ram_block
);
2352 memory_region_sync_dirty_bitmap(mr
, false);
2353 snapshot
= cpu_physical_memory_snapshot_and_clear_dirty(mr
, addr
, size
, client
);
2354 memory_global_after_dirty_log_sync();
2358 bool memory_region_snapshot_get_dirty(MemoryRegion
*mr
, DirtyBitmapSnapshot
*snap
,
2359 hwaddr addr
, hwaddr size
)
2361 assert(mr
->ram_block
);
2362 return cpu_physical_memory_snapshot_get_dirty(snap
,
2363 memory_region_get_ram_addr(mr
) + addr
, size
);
2366 void memory_region_set_readonly(MemoryRegion
*mr
, bool readonly
)
2368 if (mr
->readonly
!= readonly
) {
2369 memory_region_transaction_begin();
2370 mr
->readonly
= readonly
;
2371 memory_region_update_pending
|= mr
->enabled
;
2372 memory_region_transaction_commit();
2376 void memory_region_set_nonvolatile(MemoryRegion
*mr
, bool nonvolatile
)
2378 if (mr
->nonvolatile
!= nonvolatile
) {
2379 memory_region_transaction_begin();
2380 mr
->nonvolatile
= nonvolatile
;
2381 memory_region_update_pending
|= mr
->enabled
;
2382 memory_region_transaction_commit();
2386 void memory_region_rom_device_set_romd(MemoryRegion
*mr
, bool romd_mode
)
2388 if (mr
->romd_mode
!= romd_mode
) {
2389 memory_region_transaction_begin();
2390 mr
->romd_mode
= romd_mode
;
2391 memory_region_update_pending
|= mr
->enabled
;
2392 memory_region_transaction_commit();
2396 void memory_region_reset_dirty(MemoryRegion
*mr
, hwaddr addr
,
2397 hwaddr size
, unsigned client
)
2399 assert(mr
->ram_block
);
2400 cpu_physical_memory_test_and_clear_dirty(
2401 memory_region_get_ram_addr(mr
) + addr
, size
, client
);
2404 int memory_region_get_fd(MemoryRegion
*mr
)
2406 RCU_READ_LOCK_GUARD();
2410 return mr
->ram_block
->fd
;
2413 void *memory_region_get_ram_ptr(MemoryRegion
*mr
)
2415 uint64_t offset
= 0;
2417 RCU_READ_LOCK_GUARD();
2419 offset
+= mr
->alias_offset
;
2422 assert(mr
->ram_block
);
2423 return qemu_map_ram_ptr(mr
->ram_block
, offset
);
2426 MemoryRegion
*memory_region_from_host(void *ptr
, ram_addr_t
*offset
)
2430 block
= qemu_ram_block_from_host(ptr
, false, offset
);
2438 ram_addr_t
memory_region_get_ram_addr(MemoryRegion
*mr
)
2440 return mr
->ram_block
? mr
->ram_block
->offset
: RAM_ADDR_INVALID
;
2443 void memory_region_ram_resize(MemoryRegion
*mr
, ram_addr_t newsize
, Error
**errp
)
2445 assert(mr
->ram_block
);
2447 qemu_ram_resize(mr
->ram_block
, newsize
, errp
);
2450 void memory_region_msync(MemoryRegion
*mr
, hwaddr addr
, hwaddr size
)
2452 if (mr
->ram_block
) {
2453 qemu_ram_msync(mr
->ram_block
, addr
, size
);
2457 void memory_region_writeback(MemoryRegion
*mr
, hwaddr addr
, hwaddr size
)
2460 * Might be extended case needed to cover
2461 * different types of memory regions
2463 if (mr
->dirty_log_mask
) {
2464 memory_region_msync(mr
, addr
, size
);
2469 * Call proper memory listeners about the change on the newly
2470 * added/removed CoalescedMemoryRange.
2472 static void memory_region_update_coalesced_range(MemoryRegion
*mr
,
2473 CoalescedMemoryRange
*cmr
,
2480 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
2481 view
= address_space_get_flatview(as
);
2482 FOR_EACH_FLAT_RANGE(fr
, view
) {
2484 flat_range_coalesced_io_notify(fr
, as
, cmr
, add
);
2487 flatview_unref(view
);
2491 void memory_region_set_coalescing(MemoryRegion
*mr
)
2493 memory_region_clear_coalescing(mr
);
2494 memory_region_add_coalescing(mr
, 0, int128_get64(mr
->size
));
2497 void memory_region_add_coalescing(MemoryRegion
*mr
,
2501 CoalescedMemoryRange
*cmr
= g_malloc(sizeof(*cmr
));
2503 cmr
->addr
= addrrange_make(int128_make64(offset
), int128_make64(size
));
2504 QTAILQ_INSERT_TAIL(&mr
->coalesced
, cmr
, link
);
2505 memory_region_update_coalesced_range(mr
, cmr
, true);
2506 memory_region_set_flush_coalesced(mr
);
2509 void memory_region_clear_coalescing(MemoryRegion
*mr
)
2511 CoalescedMemoryRange
*cmr
;
2513 if (QTAILQ_EMPTY(&mr
->coalesced
)) {
2517 qemu_flush_coalesced_mmio_buffer();
2518 mr
->flush_coalesced_mmio
= false;
2520 while (!QTAILQ_EMPTY(&mr
->coalesced
)) {
2521 cmr
= QTAILQ_FIRST(&mr
->coalesced
);
2522 QTAILQ_REMOVE(&mr
->coalesced
, cmr
, link
);
2523 memory_region_update_coalesced_range(mr
, cmr
, false);
2528 void memory_region_set_flush_coalesced(MemoryRegion
*mr
)
2530 mr
->flush_coalesced_mmio
= true;
2533 void memory_region_clear_flush_coalesced(MemoryRegion
*mr
)
2535 qemu_flush_coalesced_mmio_buffer();
2536 if (QTAILQ_EMPTY(&mr
->coalesced
)) {
2537 mr
->flush_coalesced_mmio
= false;
2541 static bool userspace_eventfd_warning
;
2543 void memory_region_add_eventfd(MemoryRegion
*mr
,
2550 MemoryRegionIoeventfd mrfd
= {
2551 .addr
.start
= int128_make64(addr
),
2552 .addr
.size
= int128_make64(size
),
2553 .match_data
= match_data
,
2559 if (kvm_enabled() && (!(kvm_eventfds_enabled() ||
2560 userspace_eventfd_warning
))) {
2561 userspace_eventfd_warning
= true;
2562 error_report("Using eventfd without MMIO binding in KVM. "
2563 "Suboptimal performance expected");
2567 adjust_endianness(mr
, &mrfd
.data
, size_memop(size
) | MO_TE
);
2569 memory_region_transaction_begin();
2570 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
2571 if (memory_region_ioeventfd_before(&mrfd
, &mr
->ioeventfds
[i
])) {
2576 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
2577 sizeof(*mr
->ioeventfds
) * mr
->ioeventfd_nb
);
2578 memmove(&mr
->ioeventfds
[i
+1], &mr
->ioeventfds
[i
],
2579 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
-1 - i
));
2580 mr
->ioeventfds
[i
] = mrfd
;
2581 ioeventfd_update_pending
|= mr
->enabled
;
2582 memory_region_transaction_commit();
2585 void memory_region_del_eventfd(MemoryRegion
*mr
,
2592 MemoryRegionIoeventfd mrfd
= {
2593 .addr
.start
= int128_make64(addr
),
2594 .addr
.size
= int128_make64(size
),
2595 .match_data
= match_data
,
2602 adjust_endianness(mr
, &mrfd
.data
, size_memop(size
) | MO_TE
);
2604 memory_region_transaction_begin();
2605 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
2606 if (memory_region_ioeventfd_equal(&mrfd
, &mr
->ioeventfds
[i
])) {
2610 assert(i
!= mr
->ioeventfd_nb
);
2611 memmove(&mr
->ioeventfds
[i
], &mr
->ioeventfds
[i
+1],
2612 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
- (i
+1)));
2614 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
2615 sizeof(*mr
->ioeventfds
)*mr
->ioeventfd_nb
+ 1);
2616 ioeventfd_update_pending
|= mr
->enabled
;
2617 memory_region_transaction_commit();
2620 static void memory_region_update_container_subregions(MemoryRegion
*subregion
)
2622 MemoryRegion
*mr
= subregion
->container
;
2623 MemoryRegion
*other
;
2625 memory_region_transaction_begin();
2627 memory_region_ref(subregion
);
2628 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
2629 if (subregion
->priority
>= other
->priority
) {
2630 QTAILQ_INSERT_BEFORE(other
, subregion
, subregions_link
);
2634 QTAILQ_INSERT_TAIL(&mr
->subregions
, subregion
, subregions_link
);
2636 memory_region_update_pending
|= mr
->enabled
&& subregion
->enabled
;
2637 memory_region_transaction_commit();
2640 static void memory_region_add_subregion_common(MemoryRegion
*mr
,
2642 MemoryRegion
*subregion
)
2644 MemoryRegion
*alias
;
2646 assert(!subregion
->container
);
2647 subregion
->container
= mr
;
2648 for (alias
= subregion
->alias
; alias
; alias
= alias
->alias
) {
2649 alias
->mapped_via_alias
++;
2651 subregion
->addr
= offset
;
2652 memory_region_update_container_subregions(subregion
);
2655 void memory_region_add_subregion(MemoryRegion
*mr
,
2657 MemoryRegion
*subregion
)
2659 subregion
->priority
= 0;
2660 memory_region_add_subregion_common(mr
, offset
, subregion
);
2663 void memory_region_add_subregion_overlap(MemoryRegion
*mr
,
2665 MemoryRegion
*subregion
,
2668 subregion
->priority
= priority
;
2669 memory_region_add_subregion_common(mr
, offset
, subregion
);
2672 void memory_region_del_subregion(MemoryRegion
*mr
,
2673 MemoryRegion
*subregion
)
2675 MemoryRegion
*alias
;
2677 memory_region_transaction_begin();
2678 assert(subregion
->container
== mr
);
2679 subregion
->container
= NULL
;
2680 for (alias
= subregion
->alias
; alias
; alias
= alias
->alias
) {
2681 alias
->mapped_via_alias
--;
2682 assert(alias
->mapped_via_alias
>= 0);
2684 QTAILQ_REMOVE(&mr
->subregions
, subregion
, subregions_link
);
2685 memory_region_unref(subregion
);
2686 memory_region_update_pending
|= mr
->enabled
&& subregion
->enabled
;
2687 memory_region_transaction_commit();
2690 void memory_region_set_enabled(MemoryRegion
*mr
, bool enabled
)
2692 if (enabled
== mr
->enabled
) {
2695 memory_region_transaction_begin();
2696 mr
->enabled
= enabled
;
2697 memory_region_update_pending
= true;
2698 memory_region_transaction_commit();
2701 void memory_region_set_size(MemoryRegion
*mr
, uint64_t size
)
2703 Int128 s
= int128_make64(size
);
2705 if (size
== UINT64_MAX
) {
2708 if (int128_eq(s
, mr
->size
)) {
2711 memory_region_transaction_begin();
2713 memory_region_update_pending
= true;
2714 memory_region_transaction_commit();
2717 static void memory_region_readd_subregion(MemoryRegion
*mr
)
2719 MemoryRegion
*container
= mr
->container
;
2722 memory_region_transaction_begin();
2723 memory_region_ref(mr
);
2724 memory_region_del_subregion(container
, mr
);
2725 memory_region_add_subregion_common(container
, mr
->addr
, mr
);
2726 memory_region_unref(mr
);
2727 memory_region_transaction_commit();
2731 void memory_region_set_address(MemoryRegion
*mr
, hwaddr addr
)
2733 if (addr
!= mr
->addr
) {
2735 memory_region_readd_subregion(mr
);
2739 void memory_region_set_alias_offset(MemoryRegion
*mr
, hwaddr offset
)
2743 if (offset
== mr
->alias_offset
) {
2747 memory_region_transaction_begin();
2748 mr
->alias_offset
= offset
;
2749 memory_region_update_pending
|= mr
->enabled
;
2750 memory_region_transaction_commit();
2753 uint64_t memory_region_get_alignment(const MemoryRegion
*mr
)
2758 static int cmp_flatrange_addr(const void *addr_
, const void *fr_
)
2760 const AddrRange
*addr
= addr_
;
2761 const FlatRange
*fr
= fr_
;
2763 if (int128_le(addrrange_end(*addr
), fr
->addr
.start
)) {
2765 } else if (int128_ge(addr
->start
, addrrange_end(fr
->addr
))) {
2771 static FlatRange
*flatview_lookup(FlatView
*view
, AddrRange addr
)
2773 return bsearch(&addr
, view
->ranges
, view
->nr
,
2774 sizeof(FlatRange
), cmp_flatrange_addr
);
2777 bool memory_region_is_mapped(MemoryRegion
*mr
)
2779 return !!mr
->container
|| mr
->mapped_via_alias
;
2782 /* Same as memory_region_find, but it does not add a reference to the
2783 * returned region. It must be called from an RCU critical section.
2785 static MemoryRegionSection
memory_region_find_rcu(MemoryRegion
*mr
,
2786 hwaddr addr
, uint64_t size
)
2788 MemoryRegionSection ret
= { .mr
= NULL
};
2796 for (root
= mr
; root
->container
; ) {
2797 root
= root
->container
;
2801 as
= memory_region_to_address_space(root
);
2805 range
= addrrange_make(int128_make64(addr
), int128_make64(size
));
2807 view
= address_space_to_flatview(as
);
2808 fr
= flatview_lookup(view
, range
);
2813 while (fr
> view
->ranges
&& addrrange_intersects(fr
[-1].addr
, range
)) {
2819 range
= addrrange_intersection(range
, fr
->addr
);
2820 ret
.offset_within_region
= fr
->offset_in_region
;
2821 ret
.offset_within_region
+= int128_get64(int128_sub(range
.start
,
2823 ret
.size
= range
.size
;
2824 ret
.offset_within_address_space
= int128_get64(range
.start
);
2825 ret
.readonly
= fr
->readonly
;
2826 ret
.nonvolatile
= fr
->nonvolatile
;
2830 MemoryRegionSection
memory_region_find(MemoryRegion
*mr
,
2831 hwaddr addr
, uint64_t size
)
2833 MemoryRegionSection ret
;
2834 RCU_READ_LOCK_GUARD();
2835 ret
= memory_region_find_rcu(mr
, addr
, size
);
2837 memory_region_ref(ret
.mr
);
2842 MemoryRegionSection
*memory_region_section_new_copy(MemoryRegionSection
*s
)
2844 MemoryRegionSection
*tmp
= g_new(MemoryRegionSection
, 1);
2848 memory_region_ref(tmp
->mr
);
2851 bool ret
= flatview_ref(tmp
->fv
);
2858 void memory_region_section_free_copy(MemoryRegionSection
*s
)
2861 flatview_unref(s
->fv
);
2864 memory_region_unref(s
->mr
);
2869 bool memory_region_present(MemoryRegion
*container
, hwaddr addr
)
2873 RCU_READ_LOCK_GUARD();
2874 mr
= memory_region_find_rcu(container
, addr
, 1).mr
;
2875 return mr
&& mr
!= container
;
2878 void memory_global_dirty_log_sync(bool last_stage
)
2880 memory_region_sync_dirty_bitmap(NULL
, last_stage
);
2883 void memory_global_after_dirty_log_sync(void)
2885 MEMORY_LISTENER_CALL_GLOBAL(log_global_after_sync
, Forward
);
2889 * Dirty track stop flags that are postponed due to VM being stopped. Should
2890 * only be used within vmstate_change hook.
2892 static unsigned int postponed_stop_flags
;
2893 static VMChangeStateEntry
*vmstate_change
;
2894 static void memory_global_dirty_log_stop_postponed_run(void);
2896 void memory_global_dirty_log_start(unsigned int flags
)
2898 unsigned int old_flags
;
2900 assert(flags
&& !(flags
& (~GLOBAL_DIRTY_MASK
)));
2902 if (vmstate_change
) {
2903 /* If there is postponed stop(), operate on it first */
2904 postponed_stop_flags
&= ~flags
;
2905 memory_global_dirty_log_stop_postponed_run();
2908 flags
&= ~global_dirty_tracking
;
2913 old_flags
= global_dirty_tracking
;
2914 global_dirty_tracking
|= flags
;
2915 trace_global_dirty_changed(global_dirty_tracking
);
2918 MEMORY_LISTENER_CALL_GLOBAL(log_global_start
, Forward
);
2919 memory_region_transaction_begin();
2920 memory_region_update_pending
= true;
2921 memory_region_transaction_commit();
2925 static void memory_global_dirty_log_do_stop(unsigned int flags
)
2927 assert(flags
&& !(flags
& (~GLOBAL_DIRTY_MASK
)));
2928 assert((global_dirty_tracking
& flags
) == flags
);
2929 global_dirty_tracking
&= ~flags
;
2931 trace_global_dirty_changed(global_dirty_tracking
);
2933 if (!global_dirty_tracking
) {
2934 memory_region_transaction_begin();
2935 memory_region_update_pending
= true;
2936 memory_region_transaction_commit();
2937 MEMORY_LISTENER_CALL_GLOBAL(log_global_stop
, Reverse
);
2942 * Execute the postponed dirty log stop operations if there is, then reset
2943 * everything (including the flags and the vmstate change hook).
2945 static void memory_global_dirty_log_stop_postponed_run(void)
2947 /* This must be called with the vmstate handler registered */
2948 assert(vmstate_change
);
2950 /* Note: postponed_stop_flags can be cleared in log start routine */
2951 if (postponed_stop_flags
) {
2952 memory_global_dirty_log_do_stop(postponed_stop_flags
);
2953 postponed_stop_flags
= 0;
2956 qemu_del_vm_change_state_handler(vmstate_change
);
2957 vmstate_change
= NULL
;
2960 static void memory_vm_change_state_handler(void *opaque
, bool running
,
2964 memory_global_dirty_log_stop_postponed_run();
2968 void memory_global_dirty_log_stop(unsigned int flags
)
2970 if (!runstate_is_running()) {
2971 /* Postpone the dirty log stop, e.g., to when VM starts again */
2972 if (vmstate_change
) {
2973 /* Batch with previous postponed flags */
2974 postponed_stop_flags
|= flags
;
2976 postponed_stop_flags
= flags
;
2977 vmstate_change
= qemu_add_vm_change_state_handler(
2978 memory_vm_change_state_handler
, NULL
);
2983 memory_global_dirty_log_do_stop(flags
);
2986 static void listener_add_address_space(MemoryListener
*listener
,
2992 if (listener
->begin
) {
2993 listener
->begin(listener
);
2995 if (global_dirty_tracking
) {
2996 if (listener
->log_global_start
) {
2997 listener
->log_global_start(listener
);
3001 view
= address_space_get_flatview(as
);
3002 FOR_EACH_FLAT_RANGE(fr
, view
) {
3003 MemoryRegionSection section
= section_from_flat_range(fr
, view
);
3005 if (listener
->region_add
) {
3006 listener
->region_add(listener
, §ion
);
3008 if (fr
->dirty_log_mask
&& listener
->log_start
) {
3009 listener
->log_start(listener
, §ion
, 0, fr
->dirty_log_mask
);
3012 if (listener
->commit
) {
3013 listener
->commit(listener
);
3015 flatview_unref(view
);
3018 static void listener_del_address_space(MemoryListener
*listener
,
3024 if (listener
->begin
) {
3025 listener
->begin(listener
);
3027 view
= address_space_get_flatview(as
);
3028 FOR_EACH_FLAT_RANGE(fr
, view
) {
3029 MemoryRegionSection section
= section_from_flat_range(fr
, view
);
3031 if (fr
->dirty_log_mask
&& listener
->log_stop
) {
3032 listener
->log_stop(listener
, §ion
, fr
->dirty_log_mask
, 0);
3034 if (listener
->region_del
) {
3035 listener
->region_del(listener
, §ion
);
3038 if (listener
->commit
) {
3039 listener
->commit(listener
);
3041 flatview_unref(view
);
3044 void memory_listener_register(MemoryListener
*listener
, AddressSpace
*as
)
3046 MemoryListener
*other
= NULL
;
3048 /* Only one of them can be defined for a listener */
3049 assert(!(listener
->log_sync
&& listener
->log_sync_global
));
3051 listener
->address_space
= as
;
3052 if (QTAILQ_EMPTY(&memory_listeners
)
3053 || listener
->priority
>= QTAILQ_LAST(&memory_listeners
)->priority
) {
3054 QTAILQ_INSERT_TAIL(&memory_listeners
, listener
, link
);
3056 QTAILQ_FOREACH(other
, &memory_listeners
, link
) {
3057 if (listener
->priority
< other
->priority
) {
3061 QTAILQ_INSERT_BEFORE(other
, listener
, link
);
3064 if (QTAILQ_EMPTY(&as
->listeners
)
3065 || listener
->priority
>= QTAILQ_LAST(&as
->listeners
)->priority
) {
3066 QTAILQ_INSERT_TAIL(&as
->listeners
, listener
, link_as
);
3068 QTAILQ_FOREACH(other
, &as
->listeners
, link_as
) {
3069 if (listener
->priority
< other
->priority
) {
3073 QTAILQ_INSERT_BEFORE(other
, listener
, link_as
);
3076 listener_add_address_space(listener
, as
);
3079 void memory_listener_unregister(MemoryListener
*listener
)
3081 if (!listener
->address_space
) {
3085 listener_del_address_space(listener
, listener
->address_space
);
3086 QTAILQ_REMOVE(&memory_listeners
, listener
, link
);
3087 QTAILQ_REMOVE(&listener
->address_space
->listeners
, listener
, link_as
);
3088 listener
->address_space
= NULL
;
3091 void address_space_remove_listeners(AddressSpace
*as
)
3093 while (!QTAILQ_EMPTY(&as
->listeners
)) {
3094 memory_listener_unregister(QTAILQ_FIRST(&as
->listeners
));
3098 void address_space_init(AddressSpace
*as
, MemoryRegion
*root
, const char *name
)
3100 memory_region_ref(root
);
3102 as
->current_map
= NULL
;
3103 as
->ioeventfd_nb
= 0;
3104 as
->ioeventfds
= NULL
;
3105 QTAILQ_INIT(&as
->listeners
);
3106 QTAILQ_INSERT_TAIL(&address_spaces
, as
, address_spaces_link
);
3107 as
->name
= g_strdup(name
? name
: "anonymous");
3108 address_space_update_topology(as
);
3109 address_space_update_ioeventfds(as
);
3112 static void do_address_space_destroy(AddressSpace
*as
)
3114 assert(QTAILQ_EMPTY(&as
->listeners
));
3116 flatview_unref(as
->current_map
);
3118 g_free(as
->ioeventfds
);
3119 memory_region_unref(as
->root
);
3122 void address_space_destroy(AddressSpace
*as
)
3124 MemoryRegion
*root
= as
->root
;
3126 /* Flush out anything from MemoryListeners listening in on this */
3127 memory_region_transaction_begin();
3129 memory_region_transaction_commit();
3130 QTAILQ_REMOVE(&address_spaces
, as
, address_spaces_link
);
3132 /* At this point, as->dispatch and as->current_map are dummy
3133 * entries that the guest should never use. Wait for the old
3134 * values to expire before freeing the data.
3137 call_rcu(as
, do_address_space_destroy
, rcu
);
3140 static const char *memory_region_type(MemoryRegion
*mr
)
3143 return memory_region_type(mr
->alias
);
3145 if (memory_region_is_ram_device(mr
)) {
3147 } else if (memory_region_is_romd(mr
)) {
3149 } else if (memory_region_is_rom(mr
)) {
3151 } else if (memory_region_is_ram(mr
)) {
3158 typedef struct MemoryRegionList MemoryRegionList
;
3160 struct MemoryRegionList
{
3161 const MemoryRegion
*mr
;
3162 QTAILQ_ENTRY(MemoryRegionList
) mrqueue
;
3165 typedef QTAILQ_HEAD(, MemoryRegionList
) MemoryRegionListHead
;
3167 #define MR_SIZE(size) (int128_nz(size) ? (hwaddr)int128_get64( \
3168 int128_sub((size), int128_one())) : 0)
3169 #define MTREE_INDENT " "
3171 static void mtree_expand_owner(const char *label
, Object
*obj
)
3173 DeviceState
*dev
= (DeviceState
*) object_dynamic_cast(obj
, TYPE_DEVICE
);
3175 qemu_printf(" %s:{%s", label
, dev
? "dev" : "obj");
3176 if (dev
&& dev
->id
) {
3177 qemu_printf(" id=%s", dev
->id
);
3179 char *canonical_path
= object_get_canonical_path(obj
);
3180 if (canonical_path
) {
3181 qemu_printf(" path=%s", canonical_path
);
3182 g_free(canonical_path
);
3184 qemu_printf(" type=%s", object_get_typename(obj
));
3190 static void mtree_print_mr_owner(const MemoryRegion
*mr
)
3192 Object
*owner
= mr
->owner
;
3193 Object
*parent
= memory_region_owner((MemoryRegion
*)mr
);
3195 if (!owner
&& !parent
) {
3196 qemu_printf(" orphan");
3200 mtree_expand_owner("owner", owner
);
3202 if (parent
&& parent
!= owner
) {
3203 mtree_expand_owner("parent", parent
);
3207 static void mtree_print_mr(const MemoryRegion
*mr
, unsigned int level
,
3209 MemoryRegionListHead
*alias_print_queue
,
3210 bool owner
, bool display_disabled
)
3212 MemoryRegionList
*new_ml
, *ml
, *next_ml
;
3213 MemoryRegionListHead submr_print_queue
;
3214 const MemoryRegion
*submr
;
3216 hwaddr cur_start
, cur_end
;
3222 cur_start
= base
+ mr
->addr
;
3223 cur_end
= cur_start
+ MR_SIZE(mr
->size
);
3226 * Try to detect overflow of memory region. This should never
3227 * happen normally. When it happens, we dump something to warn the
3228 * user who is observing this.
3230 if (cur_start
< base
|| cur_end
< cur_start
) {
3231 qemu_printf("[DETECTED OVERFLOW!] ");
3235 MemoryRegionList
*ml
;
3238 /* check if the alias is already in the queue */
3239 QTAILQ_FOREACH(ml
, alias_print_queue
, mrqueue
) {
3240 if (ml
->mr
== mr
->alias
) {
3246 ml
= g_new(MemoryRegionList
, 1);
3248 QTAILQ_INSERT_TAIL(alias_print_queue
, ml
, mrqueue
);
3250 if (mr
->enabled
|| display_disabled
) {
3251 for (i
= 0; i
< level
; i
++) {
3252 qemu_printf(MTREE_INDENT
);
3254 qemu_printf(HWADDR_FMT_plx
"-" HWADDR_FMT_plx
3255 " (prio %d, %s%s): alias %s @%s " HWADDR_FMT_plx
3256 "-" HWADDR_FMT_plx
"%s",
3259 mr
->nonvolatile
? "nv-" : "",
3260 memory_region_type((MemoryRegion
*)mr
),
3261 memory_region_name(mr
),
3262 memory_region_name(mr
->alias
),
3264 mr
->alias_offset
+ MR_SIZE(mr
->size
),
3265 mr
->enabled
? "" : " [disabled]");
3267 mtree_print_mr_owner(mr
);
3272 if (mr
->enabled
|| display_disabled
) {
3273 for (i
= 0; i
< level
; i
++) {
3274 qemu_printf(MTREE_INDENT
);
3276 qemu_printf(HWADDR_FMT_plx
"-" HWADDR_FMT_plx
3277 " (prio %d, %s%s): %s%s",
3280 mr
->nonvolatile
? "nv-" : "",
3281 memory_region_type((MemoryRegion
*)mr
),
3282 memory_region_name(mr
),
3283 mr
->enabled
? "" : " [disabled]");
3285 mtree_print_mr_owner(mr
);
3291 QTAILQ_INIT(&submr_print_queue
);
3293 QTAILQ_FOREACH(submr
, &mr
->subregions
, subregions_link
) {
3294 new_ml
= g_new(MemoryRegionList
, 1);
3296 QTAILQ_FOREACH(ml
, &submr_print_queue
, mrqueue
) {
3297 if (new_ml
->mr
->addr
< ml
->mr
->addr
||
3298 (new_ml
->mr
->addr
== ml
->mr
->addr
&&
3299 new_ml
->mr
->priority
> ml
->mr
->priority
)) {
3300 QTAILQ_INSERT_BEFORE(ml
, new_ml
, mrqueue
);
3306 QTAILQ_INSERT_TAIL(&submr_print_queue
, new_ml
, mrqueue
);
3310 QTAILQ_FOREACH(ml
, &submr_print_queue
, mrqueue
) {
3311 mtree_print_mr(ml
->mr
, level
+ 1, cur_start
,
3312 alias_print_queue
, owner
, display_disabled
);
3315 QTAILQ_FOREACH_SAFE(ml
, &submr_print_queue
, mrqueue
, next_ml
) {
3320 struct FlatViewInfo
{
3327 static void mtree_print_flatview(gpointer key
, gpointer value
,
3330 FlatView
*view
= key
;
3331 GArray
*fv_address_spaces
= value
;
3332 struct FlatViewInfo
*fvi
= user_data
;
3333 FlatRange
*range
= &view
->ranges
[0];
3339 qemu_printf("FlatView #%d\n", fvi
->counter
);
3342 for (i
= 0; i
< fv_address_spaces
->len
; ++i
) {
3343 as
= g_array_index(fv_address_spaces
, AddressSpace
*, i
);
3344 qemu_printf(" AS \"%s\", root: %s",
3345 as
->name
, memory_region_name(as
->root
));
3346 if (as
->root
->alias
) {
3347 qemu_printf(", alias %s", memory_region_name(as
->root
->alias
));
3352 qemu_printf(" Root memory region: %s\n",
3353 view
->root
? memory_region_name(view
->root
) : "(none)");
3356 qemu_printf(MTREE_INDENT
"No rendered FlatView\n\n");
3362 if (range
->offset_in_region
) {
3363 qemu_printf(MTREE_INDENT HWADDR_FMT_plx
"-" HWADDR_FMT_plx
3364 " (prio %d, %s%s): %s @" HWADDR_FMT_plx
,
3365 int128_get64(range
->addr
.start
),
3366 int128_get64(range
->addr
.start
)
3367 + MR_SIZE(range
->addr
.size
),
3369 range
->nonvolatile
? "nv-" : "",
3370 range
->readonly
? "rom" : memory_region_type(mr
),
3371 memory_region_name(mr
),
3372 range
->offset_in_region
);
3374 qemu_printf(MTREE_INDENT HWADDR_FMT_plx
"-" HWADDR_FMT_plx
3375 " (prio %d, %s%s): %s",
3376 int128_get64(range
->addr
.start
),
3377 int128_get64(range
->addr
.start
)
3378 + MR_SIZE(range
->addr
.size
),
3380 range
->nonvolatile
? "nv-" : "",
3381 range
->readonly
? "rom" : memory_region_type(mr
),
3382 memory_region_name(mr
));
3385 mtree_print_mr_owner(mr
);
3389 for (i
= 0; i
< fv_address_spaces
->len
; ++i
) {
3390 as
= g_array_index(fv_address_spaces
, AddressSpace
*, i
);
3391 if (fvi
->ac
->has_memory(current_machine
, as
,
3392 int128_get64(range
->addr
.start
),
3393 MR_SIZE(range
->addr
.size
) + 1)) {
3394 qemu_printf(" %s", fvi
->ac
->name
);
3402 #if !defined(CONFIG_USER_ONLY)
3403 if (fvi
->dispatch_tree
&& view
->root
) {
3404 mtree_print_dispatch(view
->dispatch
, view
->root
);
3411 static gboolean
mtree_info_flatview_free(gpointer key
, gpointer value
,
3414 FlatView
*view
= key
;
3415 GArray
*fv_address_spaces
= value
;
3417 g_array_unref(fv_address_spaces
);
3418 flatview_unref(view
);
3423 static void mtree_info_flatview(bool dispatch_tree
, bool owner
)
3425 struct FlatViewInfo fvi
= {
3427 .dispatch_tree
= dispatch_tree
,
3432 GArray
*fv_address_spaces
;
3433 GHashTable
*views
= g_hash_table_new(g_direct_hash
, g_direct_equal
);
3434 AccelClass
*ac
= ACCEL_GET_CLASS(current_accel());
3436 if (ac
->has_memory
) {
3440 /* Gather all FVs in one table */
3441 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
3442 view
= address_space_get_flatview(as
);
3444 fv_address_spaces
= g_hash_table_lookup(views
, view
);
3445 if (!fv_address_spaces
) {
3446 fv_address_spaces
= g_array_new(false, false, sizeof(as
));
3447 g_hash_table_insert(views
, view
, fv_address_spaces
);
3450 g_array_append_val(fv_address_spaces
, as
);
3454 g_hash_table_foreach(views
, mtree_print_flatview
, &fvi
);
3457 g_hash_table_foreach_remove(views
, mtree_info_flatview_free
, 0);
3458 g_hash_table_unref(views
);
3461 struct AddressSpaceInfo
{
3462 MemoryRegionListHead
*ml_head
;
3467 /* Returns negative value if a < b; zero if a = b; positive value if a > b. */
3468 static gint
address_space_compare_name(gconstpointer a
, gconstpointer b
)
3470 const AddressSpace
*as_a
= a
;
3471 const AddressSpace
*as_b
= b
;
3473 return g_strcmp0(as_a
->name
, as_b
->name
);
3476 static void mtree_print_as_name(gpointer data
, gpointer user_data
)
3478 AddressSpace
*as
= data
;
3480 qemu_printf("address-space: %s\n", as
->name
);
3483 static void mtree_print_as(gpointer key
, gpointer value
, gpointer user_data
)
3485 MemoryRegion
*mr
= key
;
3486 GSList
*as_same_root_mr_list
= value
;
3487 struct AddressSpaceInfo
*asi
= user_data
;
3489 g_slist_foreach(as_same_root_mr_list
, mtree_print_as_name
, NULL
);
3490 mtree_print_mr(mr
, 1, 0, asi
->ml_head
, asi
->owner
, asi
->disabled
);
3494 static gboolean
mtree_info_as_free(gpointer key
, gpointer value
,
3497 GSList
*as_same_root_mr_list
= value
;
3499 g_slist_free(as_same_root_mr_list
);
3504 static void mtree_info_as(bool dispatch_tree
, bool owner
, bool disabled
)
3506 MemoryRegionListHead ml_head
;
3507 MemoryRegionList
*ml
, *ml2
;
3509 GHashTable
*views
= g_hash_table_new(g_direct_hash
, g_direct_equal
);
3510 GSList
*as_same_root_mr_list
;
3511 struct AddressSpaceInfo asi
= {
3512 .ml_head
= &ml_head
,
3514 .disabled
= disabled
,
3517 QTAILQ_INIT(&ml_head
);
3519 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
3520 /* Create hashtable, key=AS root MR, value = list of AS */
3521 as_same_root_mr_list
= g_hash_table_lookup(views
, as
->root
);
3522 as_same_root_mr_list
= g_slist_insert_sorted(as_same_root_mr_list
, as
,
3523 address_space_compare_name
);
3524 g_hash_table_insert(views
, as
->root
, as_same_root_mr_list
);
3527 /* print address spaces */
3528 g_hash_table_foreach(views
, mtree_print_as
, &asi
);
3529 g_hash_table_foreach_remove(views
, mtree_info_as_free
, 0);
3530 g_hash_table_unref(views
);
3532 /* print aliased regions */
3533 QTAILQ_FOREACH(ml
, &ml_head
, mrqueue
) {
3534 qemu_printf("memory-region: %s\n", memory_region_name(ml
->mr
));
3535 mtree_print_mr(ml
->mr
, 1, 0, &ml_head
, owner
, disabled
);
3539 QTAILQ_FOREACH_SAFE(ml
, &ml_head
, mrqueue
, ml2
) {
3544 void mtree_info(bool flatview
, bool dispatch_tree
, bool owner
, bool disabled
)
3547 mtree_info_flatview(dispatch_tree
, owner
);
3549 mtree_info_as(dispatch_tree
, owner
, disabled
);
3553 void memory_region_init_ram(MemoryRegion
*mr
,
3559 DeviceState
*owner_dev
;
3562 memory_region_init_ram_nomigrate(mr
, owner
, name
, size
, &err
);
3564 error_propagate(errp
, err
);
3567 /* This will assert if owner is neither NULL nor a DeviceState.
3568 * We only want the owner here for the purposes of defining a
3569 * unique name for migration. TODO: Ideally we should implement
3570 * a naming scheme for Objects which are not DeviceStates, in
3571 * which case we can relax this restriction.
3573 owner_dev
= DEVICE(owner
);
3574 vmstate_register_ram(mr
, owner_dev
);
3577 void memory_region_init_rom(MemoryRegion
*mr
,
3583 DeviceState
*owner_dev
;
3586 memory_region_init_rom_nomigrate(mr
, owner
, name
, size
, &err
);
3588 error_propagate(errp
, err
);
3591 /* This will assert if owner is neither NULL nor a DeviceState.
3592 * We only want the owner here for the purposes of defining a
3593 * unique name for migration. TODO: Ideally we should implement
3594 * a naming scheme for Objects which are not DeviceStates, in
3595 * which case we can relax this restriction.
3597 owner_dev
= DEVICE(owner
);
3598 vmstate_register_ram(mr
, owner_dev
);
3601 void memory_region_init_rom_device(MemoryRegion
*mr
,
3603 const MemoryRegionOps
*ops
,
3609 DeviceState
*owner_dev
;
3612 memory_region_init_rom_device_nomigrate(mr
, owner
, ops
, opaque
,
3615 error_propagate(errp
, err
);
3618 /* This will assert if owner is neither NULL nor a DeviceState.
3619 * We only want the owner here for the purposes of defining a
3620 * unique name for migration. TODO: Ideally we should implement
3621 * a naming scheme for Objects which are not DeviceStates, in
3622 * which case we can relax this restriction.
3624 owner_dev
= DEVICE(owner
);
3625 vmstate_register_ram(mr
, owner_dev
);
3629 * Support softmmu builds with CONFIG_FUZZ using a weak symbol and a stub for
3630 * the fuzz_dma_read_cb callback
3633 void __attribute__((weak
)) fuzz_dma_read_cb(size_t addr
,
3640 static const TypeInfo memory_region_info
= {
3641 .parent
= TYPE_OBJECT
,
3642 .name
= TYPE_MEMORY_REGION
,
3643 .class_size
= sizeof(MemoryRegionClass
),
3644 .instance_size
= sizeof(MemoryRegion
),
3645 .instance_init
= memory_region_initfn
,
3646 .instance_finalize
= memory_region_finalize
,
3649 static const TypeInfo iommu_memory_region_info
= {
3650 .parent
= TYPE_MEMORY_REGION
,
3651 .name
= TYPE_IOMMU_MEMORY_REGION
,
3652 .class_size
= sizeof(IOMMUMemoryRegionClass
),
3653 .instance_size
= sizeof(IOMMUMemoryRegion
),
3654 .instance_init
= iommu_memory_region_initfn
,
3658 static const TypeInfo ram_discard_manager_info
= {
3659 .parent
= TYPE_INTERFACE
,
3660 .name
= TYPE_RAM_DISCARD_MANAGER
,
3661 .class_size
= sizeof(RamDiscardManagerClass
),
3664 static void memory_register_types(void)
3666 type_register_static(&memory_region_info
);
3667 type_register_static(&iommu_memory_region_info
);
3668 type_register_static(&ram_discard_manager_info
);
3671 type_init(memory_register_types
)