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"
17 #include "qapi/error.h"
18 #include "qemu-common.h"
20 #include "exec/exec-all.h" /* qemu_sprint_backtrace */
21 #include "exec/memory.h"
22 #include "exec/address-spaces.h"
23 #include "exec/ioport.h"
24 #include "qapi/visitor.h"
25 #include "qemu/bitops.h"
26 #include "qemu/error-report.h"
27 #include "qom/object.h"
28 #include "trace-root.h"
30 #include "exec/memory-internal.h"
31 #include "exec/ram_addr.h"
32 #include "sysemu/kvm.h"
33 #include "sysemu/sysemu.h"
34 #include "hw/misc/mmio_interface.h"
35 #include "hw/qdev-properties.h"
36 #include "migration/vmstate.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 static bool global_dirty_log
= false;
45 static QTAILQ_HEAD(memory_listeners
, 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, \
120 memory_listeners, link) { \
121 if (_listener->_callback) { \
122 _listener->_callback(_listener, ##_args); \
131 #define MEMORY_LISTENER_CALL(_as, _callback, _direction, _section, _args...) \
133 MemoryListener *_listener; \
134 struct memory_listeners_as *list = &(_as)->listeners; \
136 switch (_direction) { \
138 QTAILQ_FOREACH(_listener, list, link_as) { \
139 if (_listener->_callback) { \
140 _listener->_callback(_listener, _section, ##_args); \
145 QTAILQ_FOREACH_REVERSE(_listener, list, memory_listeners_as, \
147 if (_listener->_callback) { \
148 _listener->_callback(_listener, _section, ##_args); \
157 /* No need to ref/unref .mr, the FlatRange keeps it alive. */
158 #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback, _args...) \
160 MemoryRegionSection mrs = section_from_flat_range(fr, \
161 address_space_to_flatview(as)); \
162 MEMORY_LISTENER_CALL(as, callback, dir, &mrs, ##_args); \
165 struct CoalescedMemoryRange
{
167 QTAILQ_ENTRY(CoalescedMemoryRange
) link
;
170 struct MemoryRegionIoeventfd
{
177 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a
,
178 MemoryRegionIoeventfd b
)
180 if (int128_lt(a
.addr
.start
, b
.addr
.start
)) {
182 } else if (int128_gt(a
.addr
.start
, b
.addr
.start
)) {
184 } else if (int128_lt(a
.addr
.size
, b
.addr
.size
)) {
186 } else if (int128_gt(a
.addr
.size
, b
.addr
.size
)) {
188 } else if (a
.match_data
< b
.match_data
) {
190 } else if (a
.match_data
> b
.match_data
) {
192 } else if (a
.match_data
) {
193 if (a
.data
< b
.data
) {
195 } else if (a
.data
> b
.data
) {
201 } else if (a
.e
> b
.e
) {
207 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a
,
208 MemoryRegionIoeventfd b
)
210 return !memory_region_ioeventfd_before(a
, b
)
211 && !memory_region_ioeventfd_before(b
, a
);
214 /* Range of memory in the global map. Addresses are absolute. */
217 hwaddr offset_in_region
;
219 uint8_t dirty_log_mask
;
224 typedef struct AddressSpaceOps AddressSpaceOps
;
226 #define FOR_EACH_FLAT_RANGE(var, view) \
227 for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
229 static inline MemoryRegionSection
230 section_from_flat_range(FlatRange
*fr
, FlatView
*fv
)
232 return (MemoryRegionSection
) {
235 .offset_within_region
= fr
->offset_in_region
,
236 .size
= fr
->addr
.size
,
237 .offset_within_address_space
= int128_get64(fr
->addr
.start
),
238 .readonly
= fr
->readonly
,
242 static bool flatrange_equal(FlatRange
*a
, FlatRange
*b
)
244 return a
->mr
== b
->mr
245 && addrrange_equal(a
->addr
, b
->addr
)
246 && a
->offset_in_region
== b
->offset_in_region
247 && a
->romd_mode
== b
->romd_mode
248 && a
->readonly
== b
->readonly
;
251 static FlatView
*flatview_new(MemoryRegion
*mr_root
)
255 view
= g_new0(FlatView
, 1);
257 view
->root
= mr_root
;
258 memory_region_ref(mr_root
);
259 trace_flatview_new(view
, mr_root
);
264 /* Insert a range into a given position. Caller is responsible for maintaining
267 static void flatview_insert(FlatView
*view
, unsigned pos
, FlatRange
*range
)
269 if (view
->nr
== view
->nr_allocated
) {
270 view
->nr_allocated
= MAX(2 * view
->nr
, 10);
271 view
->ranges
= g_realloc(view
->ranges
,
272 view
->nr_allocated
* sizeof(*view
->ranges
));
274 memmove(view
->ranges
+ pos
+ 1, view
->ranges
+ pos
,
275 (view
->nr
- pos
) * sizeof(FlatRange
));
276 view
->ranges
[pos
] = *range
;
277 memory_region_ref(range
->mr
);
281 static void flatview_destroy(FlatView
*view
)
285 trace_flatview_destroy(view
, view
->root
);
286 if (view
->dispatch
) {
287 address_space_dispatch_free(view
->dispatch
);
289 for (i
= 0; i
< view
->nr
; i
++) {
290 memory_region_unref(view
->ranges
[i
].mr
);
292 g_free(view
->ranges
);
293 memory_region_unref(view
->root
);
297 static bool flatview_ref(FlatView
*view
)
299 return atomic_fetch_inc_nonzero(&view
->ref
) > 0;
302 static void flatview_unref(FlatView
*view
)
304 if (atomic_fetch_dec(&view
->ref
) == 1) {
305 trace_flatview_destroy_rcu(view
, view
->root
);
307 call_rcu(view
, flatview_destroy
, rcu
);
311 static bool can_merge(FlatRange
*r1
, FlatRange
*r2
)
313 return int128_eq(addrrange_end(r1
->addr
), r2
->addr
.start
)
315 && int128_eq(int128_add(int128_make64(r1
->offset_in_region
),
317 int128_make64(r2
->offset_in_region
))
318 && r1
->dirty_log_mask
== r2
->dirty_log_mask
319 && r1
->romd_mode
== r2
->romd_mode
320 && r1
->readonly
== r2
->readonly
;
323 /* Attempt to simplify a view by merging adjacent ranges */
324 static void flatview_simplify(FlatView
*view
)
329 while (i
< view
->nr
) {
332 && can_merge(&view
->ranges
[j
-1], &view
->ranges
[j
])) {
333 int128_addto(&view
->ranges
[i
].addr
.size
, view
->ranges
[j
].addr
.size
);
337 memmove(&view
->ranges
[i
], &view
->ranges
[j
],
338 (view
->nr
- j
) * sizeof(view
->ranges
[j
]));
343 static bool memory_region_big_endian(MemoryRegion
*mr
)
345 #ifdef TARGET_WORDS_BIGENDIAN
346 return mr
->ops
->endianness
!= DEVICE_LITTLE_ENDIAN
;
348 return mr
->ops
->endianness
== DEVICE_BIG_ENDIAN
;
352 static bool memory_region_wrong_endianness(MemoryRegion
*mr
)
354 #ifdef TARGET_WORDS_BIGENDIAN
355 return mr
->ops
->endianness
== DEVICE_LITTLE_ENDIAN
;
357 return mr
->ops
->endianness
== DEVICE_BIG_ENDIAN
;
361 static void adjust_endianness(MemoryRegion
*mr
, uint64_t *data
, unsigned size
)
363 if (memory_region_wrong_endianness(mr
)) {
368 *data
= bswap16(*data
);
371 *data
= bswap32(*data
);
374 *data
= bswap64(*data
);
382 static hwaddr
memory_region_to_absolute_addr(MemoryRegion
*mr
, hwaddr offset
)
385 hwaddr abs_addr
= offset
;
387 abs_addr
+= mr
->addr
;
388 for (root
= mr
; root
->container
; ) {
389 root
= root
->container
;
390 abs_addr
+= root
->addr
;
396 static int get_cpu_index(void)
399 return current_cpu
->cpu_index
;
404 static MemTxResult
memory_region_oldmmio_read_accessor(MemoryRegion
*mr
,
414 tmp
= mr
->ops
->old_mmio
.read
[ctz32(size
)](mr
->opaque
, addr
);
416 trace_memory_region_subpage_read(get_cpu_index(), mr
, addr
, tmp
, size
);
417 } else if (mr
== &io_mem_notdirty
) {
418 /* Accesses to code which has previously been translated into a TB show
419 * up in the MMIO path, as accesses to the io_mem_notdirty
421 trace_memory_region_tb_read(get_cpu_index(), addr
, tmp
, size
);
422 } else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED
) {
423 hwaddr abs_addr
= memory_region_to_absolute_addr(mr
, addr
);
424 trace_memory_region_ops_read(get_cpu_index(), mr
, abs_addr
, tmp
, size
);
426 *value
|= (tmp
& mask
) << shift
;
430 static MemTxResult
memory_region_read_accessor(MemoryRegion
*mr
,
440 tmp
= mr
->ops
->read(mr
->opaque
, addr
, size
);
442 trace_memory_region_subpage_read(get_cpu_index(), mr
, addr
, tmp
, size
);
443 } else if (mr
== &io_mem_notdirty
) {
444 /* Accesses to code which has previously been translated into a TB show
445 * up in the MMIO path, as accesses to the io_mem_notdirty
447 trace_memory_region_tb_read(get_cpu_index(), addr
, tmp
, size
);
448 } else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED
) {
449 hwaddr abs_addr
= memory_region_to_absolute_addr(mr
, addr
);
450 trace_memory_region_ops_read(get_cpu_index(), mr
, abs_addr
, tmp
, size
);
452 *value
|= (tmp
& mask
) << shift
;
456 static MemTxResult
memory_region_read_with_attrs_accessor(MemoryRegion
*mr
,
467 r
= mr
->ops
->read_with_attrs(mr
->opaque
, addr
, &tmp
, size
, attrs
);
469 trace_memory_region_subpage_read(get_cpu_index(), mr
, addr
, tmp
, size
);
470 } else if (mr
== &io_mem_notdirty
) {
471 /* Accesses to code which has previously been translated into a TB show
472 * up in the MMIO path, as accesses to the io_mem_notdirty
474 trace_memory_region_tb_read(get_cpu_index(), addr
, tmp
, size
);
475 } else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED
) {
476 hwaddr abs_addr
= memory_region_to_absolute_addr(mr
, addr
);
477 trace_memory_region_ops_read(get_cpu_index(), mr
, abs_addr
, tmp
, size
);
479 *value
|= (tmp
& mask
) << shift
;
483 static MemTxResult
memory_region_oldmmio_write_accessor(MemoryRegion
*mr
,
493 tmp
= (*value
>> shift
) & mask
;
495 trace_memory_region_subpage_write(get_cpu_index(), mr
, addr
, tmp
, size
);
496 } else if (mr
== &io_mem_notdirty
) {
497 /* Accesses to code which has previously been translated into a TB show
498 * up in the MMIO path, as accesses to the io_mem_notdirty
500 trace_memory_region_tb_write(get_cpu_index(), addr
, tmp
, size
);
501 } else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED
) {
502 hwaddr abs_addr
= memory_region_to_absolute_addr(mr
, addr
);
503 trace_memory_region_ops_write(get_cpu_index(), mr
, abs_addr
, tmp
, size
);
505 mr
->ops
->old_mmio
.write
[ctz32(size
)](mr
->opaque
, addr
, tmp
);
509 static MemTxResult
memory_region_write_accessor(MemoryRegion
*mr
,
519 tmp
= (*value
>> shift
) & mask
;
521 trace_memory_region_subpage_write(get_cpu_index(), mr
, addr
, tmp
, size
);
522 } else if (mr
== &io_mem_notdirty
) {
523 /* Accesses to code which has previously been translated into a TB show
524 * up in the MMIO path, as accesses to the io_mem_notdirty
526 trace_memory_region_tb_write(get_cpu_index(), addr
, tmp
, size
);
527 } else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED
) {
528 hwaddr abs_addr
= memory_region_to_absolute_addr(mr
, addr
);
529 trace_memory_region_ops_write(get_cpu_index(), mr
, abs_addr
, tmp
, size
);
531 mr
->ops
->write(mr
->opaque
, addr
, tmp
, size
);
535 static MemTxResult
memory_region_write_with_attrs_accessor(MemoryRegion
*mr
,
545 tmp
= (*value
>> shift
) & mask
;
547 trace_memory_region_subpage_write(get_cpu_index(), mr
, addr
, tmp
, size
);
548 } else if (mr
== &io_mem_notdirty
) {
549 /* Accesses to code which has previously been translated into a TB show
550 * up in the MMIO path, as accesses to the io_mem_notdirty
552 trace_memory_region_tb_write(get_cpu_index(), addr
, tmp
, size
);
553 } else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED
) {
554 hwaddr abs_addr
= memory_region_to_absolute_addr(mr
, addr
);
555 trace_memory_region_ops_write(get_cpu_index(), mr
, abs_addr
, tmp
, size
);
557 return mr
->ops
->write_with_attrs(mr
->opaque
, addr
, tmp
, size
, attrs
);
560 static MemTxResult
access_with_adjusted_size(hwaddr addr
,
563 unsigned access_size_min
,
564 unsigned access_size_max
,
565 MemTxResult (*access_fn
)
576 uint64_t access_mask
;
577 unsigned access_size
;
579 MemTxResult r
= MEMTX_OK
;
581 if (!access_size_min
) {
584 if (!access_size_max
) {
588 /* FIXME: support unaligned access? */
589 access_size
= MAX(MIN(size
, access_size_max
), access_size_min
);
590 access_mask
= -1ULL >> (64 - access_size
* 8);
591 if (memory_region_big_endian(mr
)) {
592 for (i
= 0; i
< size
; i
+= access_size
) {
593 r
|= access_fn(mr
, addr
+ i
, value
, access_size
,
594 (size
- access_size
- i
) * 8, access_mask
, attrs
);
597 for (i
= 0; i
< size
; i
+= access_size
) {
598 r
|= access_fn(mr
, addr
+ i
, value
, access_size
, i
* 8,
605 static AddressSpace
*memory_region_to_address_space(MemoryRegion
*mr
)
609 while (mr
->container
) {
612 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
613 if (mr
== as
->root
) {
620 /* Render a memory region into the global view. Ranges in @view obscure
623 static void render_memory_region(FlatView
*view
,
629 MemoryRegion
*subregion
;
631 hwaddr offset_in_region
;
641 int128_addto(&base
, int128_make64(mr
->addr
));
642 readonly
|= mr
->readonly
;
644 tmp
= addrrange_make(base
, mr
->size
);
646 if (!addrrange_intersects(tmp
, clip
)) {
650 clip
= addrrange_intersection(tmp
, clip
);
653 int128_subfrom(&base
, int128_make64(mr
->alias
->addr
));
654 int128_subfrom(&base
, int128_make64(mr
->alias_offset
));
655 render_memory_region(view
, mr
->alias
, base
, clip
, readonly
);
659 /* Render subregions in priority order. */
660 QTAILQ_FOREACH(subregion
, &mr
->subregions
, subregions_link
) {
661 render_memory_region(view
, subregion
, base
, clip
, readonly
);
664 if (!mr
->terminates
) {
668 offset_in_region
= int128_get64(int128_sub(clip
.start
, base
));
673 fr
.dirty_log_mask
= memory_region_get_dirty_log_mask(mr
);
674 fr
.romd_mode
= mr
->romd_mode
;
675 fr
.readonly
= readonly
;
677 /* Render the region itself into any gaps left by the current view. */
678 for (i
= 0; i
< view
->nr
&& int128_nz(remain
); ++i
) {
679 if (int128_ge(base
, addrrange_end(view
->ranges
[i
].addr
))) {
682 if (int128_lt(base
, view
->ranges
[i
].addr
.start
)) {
683 now
= int128_min(remain
,
684 int128_sub(view
->ranges
[i
].addr
.start
, base
));
685 fr
.offset_in_region
= offset_in_region
;
686 fr
.addr
= addrrange_make(base
, now
);
687 flatview_insert(view
, i
, &fr
);
689 int128_addto(&base
, now
);
690 offset_in_region
+= int128_get64(now
);
691 int128_subfrom(&remain
, now
);
693 now
= int128_sub(int128_min(int128_add(base
, remain
),
694 addrrange_end(view
->ranges
[i
].addr
)),
696 int128_addto(&base
, now
);
697 offset_in_region
+= int128_get64(now
);
698 int128_subfrom(&remain
, now
);
700 if (int128_nz(remain
)) {
701 fr
.offset_in_region
= offset_in_region
;
702 fr
.addr
= addrrange_make(base
, remain
);
703 flatview_insert(view
, i
, &fr
);
707 static MemoryRegion
*memory_region_get_flatview_root(MemoryRegion
*mr
)
709 while (mr
->enabled
) {
711 if (!mr
->alias_offset
&& int128_ge(mr
->size
, mr
->alias
->size
)) {
712 /* The alias is included in its entirety. Use it as
713 * the "real" root, so that we can share more FlatViews.
718 } else if (!mr
->terminates
) {
719 unsigned int found
= 0;
720 MemoryRegion
*child
, *next
= NULL
;
721 QTAILQ_FOREACH(child
, &mr
->subregions
, subregions_link
) {
722 if (child
->enabled
) {
727 if (!child
->addr
&& int128_ge(mr
->size
, child
->size
)) {
728 /* A child is included in its entirety. If it's the only
729 * enabled one, use it in the hope of finding an alias down the
730 * way. This will also let us share FlatViews.
751 /* Render a memory topology into a list of disjoint absolute ranges. */
752 static FlatView
*generate_memory_topology(MemoryRegion
*mr
)
757 view
= flatview_new(mr
);
760 render_memory_region(view
, mr
, int128_zero(),
761 addrrange_make(int128_zero(), int128_2_64()), false);
763 flatview_simplify(view
);
765 view
->dispatch
= address_space_dispatch_new(view
);
766 for (i
= 0; i
< view
->nr
; i
++) {
767 MemoryRegionSection mrs
=
768 section_from_flat_range(&view
->ranges
[i
], view
);
769 flatview_add_to_dispatch(view
, &mrs
);
771 address_space_dispatch_compact(view
->dispatch
);
772 g_hash_table_replace(flat_views
, mr
, view
);
777 static void address_space_add_del_ioeventfds(AddressSpace
*as
,
778 MemoryRegionIoeventfd
*fds_new
,
780 MemoryRegionIoeventfd
*fds_old
,
784 MemoryRegionIoeventfd
*fd
;
785 MemoryRegionSection section
;
787 /* Generate a symmetric difference of the old and new fd sets, adding
788 * and deleting as necessary.
792 while (iold
< fds_old_nb
|| inew
< fds_new_nb
) {
793 if (iold
< fds_old_nb
794 && (inew
== fds_new_nb
795 || memory_region_ioeventfd_before(fds_old
[iold
],
798 section
= (MemoryRegionSection
) {
799 .fv
= address_space_to_flatview(as
),
800 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
801 .size
= fd
->addr
.size
,
803 MEMORY_LISTENER_CALL(as
, eventfd_del
, Forward
, §ion
,
804 fd
->match_data
, fd
->data
, fd
->e
);
806 } else if (inew
< fds_new_nb
807 && (iold
== fds_old_nb
808 || memory_region_ioeventfd_before(fds_new
[inew
],
811 section
= (MemoryRegionSection
) {
812 .fv
= address_space_to_flatview(as
),
813 .offset_within_address_space
= int128_get64(fd
->addr
.start
),
814 .size
= fd
->addr
.size
,
816 MEMORY_LISTENER_CALL(as
, eventfd_add
, Reverse
, §ion
,
817 fd
->match_data
, fd
->data
, fd
->e
);
826 static FlatView
*address_space_get_flatview(AddressSpace
*as
)
832 view
= address_space_to_flatview(as
);
833 /* If somebody has replaced as->current_map concurrently,
834 * flatview_ref returns false.
836 } while (!flatview_ref(view
));
841 static void address_space_update_ioeventfds(AddressSpace
*as
)
845 unsigned ioeventfd_nb
= 0;
846 MemoryRegionIoeventfd
*ioeventfds
= NULL
;
850 view
= address_space_get_flatview(as
);
851 FOR_EACH_FLAT_RANGE(fr
, view
) {
852 for (i
= 0; i
< fr
->mr
->ioeventfd_nb
; ++i
) {
853 tmp
= addrrange_shift(fr
->mr
->ioeventfds
[i
].addr
,
854 int128_sub(fr
->addr
.start
,
855 int128_make64(fr
->offset_in_region
)));
856 if (addrrange_intersects(fr
->addr
, tmp
)) {
858 ioeventfds
= g_realloc(ioeventfds
,
859 ioeventfd_nb
* sizeof(*ioeventfds
));
860 ioeventfds
[ioeventfd_nb
-1] = fr
->mr
->ioeventfds
[i
];
861 ioeventfds
[ioeventfd_nb
-1].addr
= tmp
;
866 address_space_add_del_ioeventfds(as
, ioeventfds
, ioeventfd_nb
,
867 as
->ioeventfds
, as
->ioeventfd_nb
);
869 g_free(as
->ioeventfds
);
870 as
->ioeventfds
= ioeventfds
;
871 as
->ioeventfd_nb
= ioeventfd_nb
;
872 flatview_unref(view
);
875 static void address_space_update_topology_pass(AddressSpace
*as
,
876 const FlatView
*old_view
,
877 const FlatView
*new_view
,
881 FlatRange
*frold
, *frnew
;
883 /* Generate a symmetric difference of the old and new memory maps.
884 * Kill ranges in the old map, and instantiate ranges in the new map.
887 while (iold
< old_view
->nr
|| inew
< new_view
->nr
) {
888 if (iold
< old_view
->nr
) {
889 frold
= &old_view
->ranges
[iold
];
893 if (inew
< new_view
->nr
) {
894 frnew
= &new_view
->ranges
[inew
];
901 || int128_lt(frold
->addr
.start
, frnew
->addr
.start
)
902 || (int128_eq(frold
->addr
.start
, frnew
->addr
.start
)
903 && !flatrange_equal(frold
, frnew
)))) {
904 /* In old but not in new, or in both but attributes changed. */
907 MEMORY_LISTENER_UPDATE_REGION(frold
, as
, Reverse
, region_del
);
911 } else if (frold
&& frnew
&& flatrange_equal(frold
, frnew
)) {
912 /* In both and unchanged (except logging may have changed) */
915 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_nop
);
916 if (frnew
->dirty_log_mask
& ~frold
->dirty_log_mask
) {
917 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, log_start
,
918 frold
->dirty_log_mask
,
919 frnew
->dirty_log_mask
);
921 if (frold
->dirty_log_mask
& ~frnew
->dirty_log_mask
) {
922 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Reverse
, log_stop
,
923 frold
->dirty_log_mask
,
924 frnew
->dirty_log_mask
);
934 MEMORY_LISTENER_UPDATE_REGION(frnew
, as
, Forward
, region_add
);
942 static void flatviews_init(void)
944 static FlatView
*empty_view
;
950 flat_views
= g_hash_table_new_full(g_direct_hash
, g_direct_equal
, NULL
,
951 (GDestroyNotify
) flatview_unref
);
953 empty_view
= generate_memory_topology(NULL
);
954 /* We keep it alive forever in the global variable. */
955 flatview_ref(empty_view
);
957 g_hash_table_replace(flat_views
, NULL
, empty_view
);
958 flatview_ref(empty_view
);
962 static void flatviews_reset(void)
967 g_hash_table_unref(flat_views
);
972 /* Render unique FVs */
973 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
974 MemoryRegion
*physmr
= memory_region_get_flatview_root(as
->root
);
976 if (g_hash_table_lookup(flat_views
, physmr
)) {
980 generate_memory_topology(physmr
);
984 static void address_space_set_flatview(AddressSpace
*as
)
986 FlatView
*old_view
= address_space_to_flatview(as
);
987 MemoryRegion
*physmr
= memory_region_get_flatview_root(as
->root
);
988 FlatView
*new_view
= g_hash_table_lookup(flat_views
, physmr
);
992 if (old_view
== new_view
) {
997 flatview_ref(old_view
);
1000 flatview_ref(new_view
);
1002 if (!QTAILQ_EMPTY(&as
->listeners
)) {
1003 FlatView tmpview
= { .nr
= 0 }, *old_view2
= old_view
;
1006 old_view2
= &tmpview
;
1008 address_space_update_topology_pass(as
, old_view2
, new_view
, false);
1009 address_space_update_topology_pass(as
, old_view2
, new_view
, true);
1012 /* Writes are protected by the BQL. */
1013 atomic_rcu_set(&as
->current_map
, new_view
);
1015 flatview_unref(old_view
);
1018 /* Note that all the old MemoryRegions are still alive up to this
1019 * point. This relieves most MemoryListeners from the need to
1020 * ref/unref the MemoryRegions they get---unless they use them
1021 * outside the iothread mutex, in which case precise reference
1022 * counting is necessary.
1025 flatview_unref(old_view
);
1029 static void address_space_update_topology(AddressSpace
*as
)
1031 MemoryRegion
*physmr
= memory_region_get_flatview_root(as
->root
);
1034 if (!g_hash_table_lookup(flat_views
, physmr
)) {
1035 generate_memory_topology(physmr
);
1037 address_space_set_flatview(as
);
1040 void memory_region_transaction_begin(void)
1042 qemu_flush_coalesced_mmio_buffer();
1043 ++memory_region_transaction_depth
;
1046 void memory_region_transaction_commit(void)
1050 assert(memory_region_transaction_depth
);
1051 assert(qemu_mutex_iothread_locked());
1053 --memory_region_transaction_depth
;
1054 if (!memory_region_transaction_depth
) {
1055 if (memory_region_update_pending
) {
1058 MEMORY_LISTENER_CALL_GLOBAL(begin
, Forward
);
1060 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1061 address_space_set_flatview(as
);
1062 address_space_update_ioeventfds(as
);
1064 memory_region_update_pending
= false;
1065 ioeventfd_update_pending
= false;
1066 MEMORY_LISTENER_CALL_GLOBAL(commit
, Forward
);
1067 } else if (ioeventfd_update_pending
) {
1068 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
1069 address_space_update_ioeventfds(as
);
1071 ioeventfd_update_pending
= false;
1076 static void memory_region_destructor_none(MemoryRegion
*mr
)
1080 static void memory_region_destructor_ram(MemoryRegion
*mr
)
1082 qemu_ram_free(mr
->ram_block
);
1085 static bool memory_region_need_escape(char c
)
1087 return c
== '/' || c
== '[' || c
== '\\' || c
== ']';
1090 static char *memory_region_escape_name(const char *name
)
1097 for (p
= name
; *p
; p
++) {
1098 bytes
+= memory_region_need_escape(*p
) ? 4 : 1;
1100 if (bytes
== p
- name
) {
1101 return g_memdup(name
, bytes
+ 1);
1104 escaped
= g_malloc(bytes
+ 1);
1105 for (p
= name
, q
= escaped
; *p
; p
++) {
1107 if (unlikely(memory_region_need_escape(c
))) {
1110 *q
++ = "0123456789abcdef"[c
>> 4];
1111 c
= "0123456789abcdef"[c
& 15];
1119 static void memory_region_do_init(MemoryRegion
*mr
,
1124 mr
->size
= int128_make64(size
);
1125 if (size
== UINT64_MAX
) {
1126 mr
->size
= int128_2_64();
1128 mr
->name
= g_strdup(name
);
1130 mr
->ram_block
= NULL
;
1133 char *escaped_name
= memory_region_escape_name(name
);
1134 char *name_array
= g_strdup_printf("%s[*]", escaped_name
);
1137 owner
= container_get(qdev_get_machine(), "/unattached");
1140 object_property_add_child(owner
, name_array
, OBJECT(mr
), &error_abort
);
1141 object_unref(OBJECT(mr
));
1143 g_free(escaped_name
);
1147 void memory_region_init(MemoryRegion
*mr
,
1152 object_initialize(mr
, sizeof(*mr
), TYPE_MEMORY_REGION
);
1153 memory_region_do_init(mr
, owner
, name
, size
);
1156 static void memory_region_get_addr(Object
*obj
, Visitor
*v
, const char *name
,
1157 void *opaque
, Error
**errp
)
1159 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1160 uint64_t value
= mr
->addr
;
1162 visit_type_uint64(v
, name
, &value
, errp
);
1165 static void memory_region_get_container(Object
*obj
, Visitor
*v
,
1166 const char *name
, void *opaque
,
1169 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1170 gchar
*path
= (gchar
*)"";
1172 if (mr
->container
) {
1173 path
= object_get_canonical_path(OBJECT(mr
->container
));
1175 visit_type_str(v
, name
, &path
, errp
);
1176 if (mr
->container
) {
1181 static Object
*memory_region_resolve_container(Object
*obj
, void *opaque
,
1184 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1186 return OBJECT(mr
->container
);
1189 static void memory_region_get_priority(Object
*obj
, Visitor
*v
,
1190 const char *name
, void *opaque
,
1193 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1194 int32_t value
= mr
->priority
;
1196 visit_type_int32(v
, name
, &value
, errp
);
1199 static void memory_region_get_size(Object
*obj
, Visitor
*v
, const char *name
,
1200 void *opaque
, Error
**errp
)
1202 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1203 uint64_t value
= memory_region_size(mr
);
1205 visit_type_uint64(v
, name
, &value
, errp
);
1208 static void memory_region_initfn(Object
*obj
)
1210 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1213 mr
->ops
= &unassigned_mem_ops
;
1215 mr
->romd_mode
= true;
1216 mr
->global_locking
= true;
1217 mr
->destructor
= memory_region_destructor_none
;
1218 QTAILQ_INIT(&mr
->subregions
);
1219 QTAILQ_INIT(&mr
->coalesced
);
1221 op
= object_property_add(OBJECT(mr
), "container",
1222 "link<" TYPE_MEMORY_REGION
">",
1223 memory_region_get_container
,
1224 NULL
, /* memory_region_set_container */
1225 NULL
, NULL
, &error_abort
);
1226 op
->resolve
= memory_region_resolve_container
;
1228 object_property_add(OBJECT(mr
), "addr", "uint64",
1229 memory_region_get_addr
,
1230 NULL
, /* memory_region_set_addr */
1231 NULL
, NULL
, &error_abort
);
1232 object_property_add(OBJECT(mr
), "priority", "uint32",
1233 memory_region_get_priority
,
1234 NULL
, /* memory_region_set_priority */
1235 NULL
, NULL
, &error_abort
);
1236 object_property_add(OBJECT(mr
), "size", "uint64",
1237 memory_region_get_size
,
1238 NULL
, /* memory_region_set_size, */
1239 NULL
, NULL
, &error_abort
);
1242 static int qemu_target_backtrace(target_ulong
*array
, size_t size
)
1246 #if defined(TARGET_ARM)
1247 CPUArchState
*env
= current_cpu
->env_ptr
;
1248 array
[0] = env
->regs
[15];
1249 array
[1] = env
->regs
[14];
1250 #elif defined(TARGET_MIPS)
1251 CPUArchState
*env
= current_cpu
->env_ptr
;
1252 array
[0] = env
->active_tc
.PC
;
1253 array
[1] = env
->active_tc
.gpr
[31];
1263 #include "disas/disas.h"
1264 const char *qemu_sprint_backtrace(char *buffer
, size_t length
)
1268 target_ulong caller
[2];
1270 qemu_target_backtrace(caller
, 2);
1271 symbol
= lookup_symbol(caller
[0]);
1272 p
+= sprintf(p
, "[%s]", symbol
);
1273 symbol
= lookup_symbol(caller
[1]);
1274 p
+= sprintf(p
, "[%s]", symbol
);
1276 p
+= sprintf(p
, "[cpu not running]");
1278 assert((p
- buffer
) < length
);
1282 static void iommu_memory_region_initfn(Object
*obj
)
1284 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1286 mr
->is_iommu
= true;
1289 static uint64_t unassigned_mem_read(void *opaque
, hwaddr addr
,
1292 if (trace_unassigned
) {
1294 fprintf(stderr
, "Unassigned mem read " TARGET_FMT_plx
" %s\n",
1295 addr
, qemu_sprint_backtrace(buffer
, sizeof(buffer
)));
1298 if (current_cpu
!= NULL
) {
1299 cpu_unassigned_access(current_cpu
, addr
, false, false, 0, size
);
1304 static void unassigned_mem_write(void *opaque
, hwaddr addr
,
1305 uint64_t val
, unsigned size
)
1307 if (trace_unassigned
) {
1309 fprintf(stderr
, "Unassigned mem write " TARGET_FMT_plx
1310 " = 0x%" PRIx64
" %s\n",
1311 addr
, val
, qemu_sprint_backtrace(buffer
, sizeof(buffer
)));
1313 if (current_cpu
!= NULL
) {
1314 cpu_unassigned_access(current_cpu
, addr
, true, false, 0, size
);
1318 static bool unassigned_mem_accepts(void *opaque
, hwaddr addr
,
1319 unsigned size
, bool is_write
)
1324 const MemoryRegionOps unassigned_mem_ops
= {
1325 .valid
.accepts
= unassigned_mem_accepts
,
1326 .endianness
= DEVICE_NATIVE_ENDIAN
,
1329 static uint64_t memory_region_ram_device_read(void *opaque
,
1330 hwaddr addr
, unsigned size
)
1332 MemoryRegion
*mr
= opaque
;
1333 uint64_t data
= (uint64_t)~0;
1337 data
= *(uint8_t *)(mr
->ram_block
->host
+ addr
);
1340 data
= *(uint16_t *)(mr
->ram_block
->host
+ addr
);
1343 data
= *(uint32_t *)(mr
->ram_block
->host
+ addr
);
1346 data
= *(uint64_t *)(mr
->ram_block
->host
+ addr
);
1350 trace_memory_region_ram_device_read(get_cpu_index(), mr
, addr
, data
, size
);
1355 static void memory_region_ram_device_write(void *opaque
, hwaddr addr
,
1356 uint64_t data
, unsigned size
)
1358 MemoryRegion
*mr
= opaque
;
1360 trace_memory_region_ram_device_write(get_cpu_index(), mr
, addr
, data
, size
);
1364 *(uint8_t *)(mr
->ram_block
->host
+ addr
) = (uint8_t)data
;
1367 *(uint16_t *)(mr
->ram_block
->host
+ addr
) = (uint16_t)data
;
1370 *(uint32_t *)(mr
->ram_block
->host
+ addr
) = (uint32_t)data
;
1373 *(uint64_t *)(mr
->ram_block
->host
+ addr
) = data
;
1378 static const MemoryRegionOps ram_device_mem_ops
= {
1379 .read
= memory_region_ram_device_read
,
1380 .write
= memory_region_ram_device_write
,
1381 .endianness
= DEVICE_HOST_ENDIAN
,
1383 .min_access_size
= 1,
1384 .max_access_size
= 8,
1388 .min_access_size
= 1,
1389 .max_access_size
= 8,
1394 bool memory_region_access_valid(MemoryRegion
*mr
,
1399 int access_size_min
, access_size_max
;
1402 if (!mr
->ops
->valid
.unaligned
&& (addr
& (size
- 1))) {
1403 fprintf(stderr
, "Misaligned i/o to address %08" HWADDR_PRIx
1404 " with size %u for memory region %s\n",
1405 addr
, size
, mr
->name
);
1409 if (!mr
->ops
->valid
.accepts
) {
1413 access_size_min
= mr
->ops
->valid
.min_access_size
;
1414 if (!mr
->ops
->valid
.min_access_size
) {
1415 access_size_min
= 1;
1418 access_size_max
= mr
->ops
->valid
.max_access_size
;
1419 if (!mr
->ops
->valid
.max_access_size
) {
1420 access_size_max
= 4;
1423 access_size
= MAX(MIN(size
, access_size_max
), access_size_min
);
1424 for (i
= 0; i
< size
; i
+= access_size
) {
1425 if (!mr
->ops
->valid
.accepts(mr
->opaque
, addr
+ i
, 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
,
1448 } else if (mr
->ops
->read_with_attrs
) {
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
,
1455 return access_with_adjusted_size(addr
, pval
, size
, 1, 4,
1456 memory_region_oldmmio_read_accessor
,
1461 MemTxResult
memory_region_dispatch_read(MemoryRegion
*mr
,
1469 if (!memory_region_access_valid(mr
, addr
, size
, false)) {
1470 *pval
= unassigned_mem_read(mr
, addr
, size
);
1471 return MEMTX_DECODE_ERROR
;
1474 r
= memory_region_dispatch_read1(mr
, addr
, pval
, size
, attrs
);
1475 adjust_endianness(mr
, pval
, size
);
1479 /* Return true if an eventfd was signalled */
1480 static bool memory_region_dispatch_write_eventfds(MemoryRegion
*mr
,
1486 MemoryRegionIoeventfd ioeventfd
= {
1487 .addr
= addrrange_make(int128_make64(addr
), int128_make64(size
)),
1492 for (i
= 0; i
< mr
->ioeventfd_nb
; i
++) {
1493 ioeventfd
.match_data
= mr
->ioeventfds
[i
].match_data
;
1494 ioeventfd
.e
= mr
->ioeventfds
[i
].e
;
1496 if (memory_region_ioeventfd_equal(ioeventfd
, mr
->ioeventfds
[i
])) {
1497 event_notifier_set(ioeventfd
.e
);
1505 MemTxResult
memory_region_dispatch_write(MemoryRegion
*mr
,
1511 if (!memory_region_access_valid(mr
, addr
, size
, true)) {
1512 unassigned_mem_write(mr
, addr
, data
, size
);
1513 return MEMTX_DECODE_ERROR
;
1516 adjust_endianness(mr
, &data
, size
);
1518 if ((!kvm_eventfds_enabled()) &&
1519 memory_region_dispatch_write_eventfds(mr
, addr
, data
, size
, attrs
)) {
1523 if (mr
->ops
->write
) {
1524 return access_with_adjusted_size(addr
, &data
, size
,
1525 mr
->ops
->impl
.min_access_size
,
1526 mr
->ops
->impl
.max_access_size
,
1527 memory_region_write_accessor
, mr
,
1529 } else if (mr
->ops
->write_with_attrs
) {
1531 access_with_adjusted_size(addr
, &data
, size
,
1532 mr
->ops
->impl
.min_access_size
,
1533 mr
->ops
->impl
.max_access_size
,
1534 memory_region_write_with_attrs_accessor
,
1537 return access_with_adjusted_size(addr
, &data
, size
, 1, 4,
1538 memory_region_oldmmio_write_accessor
,
1543 void memory_region_init_io(MemoryRegion
*mr
,
1545 const MemoryRegionOps
*ops
,
1550 memory_region_init(mr
, owner
, name
, size
);
1551 mr
->ops
= ops
? ops
: &unassigned_mem_ops
;
1552 mr
->opaque
= opaque
;
1553 mr
->terminates
= true;
1556 void memory_region_init_ram_nomigrate(MemoryRegion
*mr
,
1562 memory_region_init_ram_shared_nomigrate(mr
, owner
, name
, size
, false, errp
);
1565 void memory_region_init_ram_shared_nomigrate(MemoryRegion
*mr
,
1572 memory_region_init(mr
, owner
, name
, size
);
1574 mr
->terminates
= true;
1575 mr
->destructor
= memory_region_destructor_ram
;
1576 mr
->ram_block
= qemu_ram_alloc(size
, share
, mr
, errp
);
1577 mr
->dirty_log_mask
= tcg_enabled() ? (1 << DIRTY_MEMORY_CODE
) : 0;
1580 void memory_region_init_resizeable_ram(MemoryRegion
*mr
,
1585 void (*resized
)(const char*,
1590 memory_region_init(mr
, owner
, name
, size
);
1592 mr
->terminates
= true;
1593 mr
->destructor
= memory_region_destructor_ram
;
1594 mr
->ram_block
= qemu_ram_alloc_resizeable(size
, max_size
, resized
,
1596 mr
->dirty_log_mask
= tcg_enabled() ? (1 << DIRTY_MEMORY_CODE
) : 0;
1600 void memory_region_init_ram_from_file(MemoryRegion
*mr
,
1601 struct Object
*owner
,
1609 memory_region_init(mr
, owner
, name
, size
);
1611 mr
->terminates
= true;
1612 mr
->destructor
= memory_region_destructor_ram
;
1614 mr
->ram_block
= qemu_ram_alloc_from_file(size
, mr
, share
, path
, errp
);
1615 mr
->dirty_log_mask
= tcg_enabled() ? (1 << DIRTY_MEMORY_CODE
) : 0;
1618 void memory_region_init_ram_from_fd(MemoryRegion
*mr
,
1619 struct Object
*owner
,
1626 memory_region_init(mr
, owner
, name
, size
);
1628 mr
->terminates
= true;
1629 mr
->destructor
= memory_region_destructor_ram
;
1630 mr
->ram_block
= qemu_ram_alloc_from_fd(size
, mr
, share
, fd
, errp
);
1631 mr
->dirty_log_mask
= tcg_enabled() ? (1 << DIRTY_MEMORY_CODE
) : 0;
1635 void memory_region_init_ram_ptr(MemoryRegion
*mr
,
1641 memory_region_init(mr
, owner
, name
, size
);
1643 mr
->terminates
= true;
1644 mr
->destructor
= memory_region_destructor_ram
;
1645 mr
->dirty_log_mask
= tcg_enabled() ? (1 << DIRTY_MEMORY_CODE
) : 0;
1647 /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
1648 assert(ptr
!= NULL
);
1649 mr
->ram_block
= qemu_ram_alloc_from_ptr(size
, ptr
, mr
, &error_fatal
);
1652 void memory_region_init_ram_device_ptr(MemoryRegion
*mr
,
1658 memory_region_init_ram_ptr(mr
, owner
, name
, size
, ptr
);
1659 mr
->ram_device
= true;
1660 mr
->ops
= &ram_device_mem_ops
;
1664 void memory_region_init_alias(MemoryRegion
*mr
,
1671 memory_region_init(mr
, owner
, name
, size
);
1673 mr
->alias_offset
= offset
;
1676 void memory_region_init_rom_nomigrate(MemoryRegion
*mr
,
1677 struct Object
*owner
,
1682 memory_region_init(mr
, owner
, name
, size
);
1684 mr
->readonly
= true;
1685 mr
->terminates
= true;
1686 mr
->destructor
= memory_region_destructor_ram
;
1687 mr
->ram_block
= qemu_ram_alloc(size
, false, mr
, errp
);
1688 mr
->dirty_log_mask
= tcg_enabled() ? (1 << DIRTY_MEMORY_CODE
) : 0;
1691 void memory_region_init_rom_device_nomigrate(MemoryRegion
*mr
,
1693 const MemoryRegionOps
*ops
,
1700 memory_region_init(mr
, owner
, name
, size
);
1702 mr
->opaque
= opaque
;
1703 mr
->terminates
= true;
1704 mr
->rom_device
= true;
1705 mr
->destructor
= memory_region_destructor_ram
;
1706 mr
->ram_block
= qemu_ram_alloc(size
, false, mr
, errp
);
1709 void memory_region_init_iommu(void *_iommu_mr
,
1710 size_t instance_size
,
1711 const char *mrtypename
,
1716 struct IOMMUMemoryRegion
*iommu_mr
;
1717 struct MemoryRegion
*mr
;
1719 object_initialize(_iommu_mr
, instance_size
, mrtypename
);
1720 mr
= MEMORY_REGION(_iommu_mr
);
1721 memory_region_do_init(mr
, owner
, name
, size
);
1722 iommu_mr
= IOMMU_MEMORY_REGION(mr
);
1723 mr
->terminates
= true; /* then re-forwards */
1724 QLIST_INIT(&iommu_mr
->iommu_notify
);
1725 iommu_mr
->iommu_notify_flags
= IOMMU_NOTIFIER_NONE
;
1728 static void memory_region_finalize(Object
*obj
)
1730 MemoryRegion
*mr
= MEMORY_REGION(obj
);
1732 assert(!mr
->container
);
1734 /* We know the region is not visible in any address space (it
1735 * does not have a container and cannot be a root either because
1736 * it has no references, so we can blindly clear mr->enabled.
1737 * memory_region_set_enabled instead could trigger a transaction
1738 * and cause an infinite loop.
1740 mr
->enabled
= false;
1741 memory_region_transaction_begin();
1742 while (!QTAILQ_EMPTY(&mr
->subregions
)) {
1743 MemoryRegion
*subregion
= QTAILQ_FIRST(&mr
->subregions
);
1744 memory_region_del_subregion(mr
, subregion
);
1746 memory_region_transaction_commit();
1749 memory_region_clear_coalescing(mr
);
1750 g_free((char *)mr
->name
);
1751 g_free(mr
->ioeventfds
);
1754 Object
*memory_region_owner(MemoryRegion
*mr
)
1756 Object
*obj
= OBJECT(mr
);
1760 void memory_region_ref(MemoryRegion
*mr
)
1762 /* MMIO callbacks most likely will access data that belongs
1763 * to the owner, hence the need to ref/unref the owner whenever
1764 * the memory region is in use.
1766 * The memory region is a child of its owner. As long as the
1767 * owner doesn't call unparent itself on the memory region,
1768 * ref-ing the owner will also keep the memory region alive.
1769 * Memory regions without an owner are supposed to never go away;
1770 * we do not ref/unref them because it slows down DMA sensibly.
1772 if (mr
&& mr
->owner
) {
1773 object_ref(mr
->owner
);
1777 void memory_region_unref(MemoryRegion
*mr
)
1779 if (mr
&& mr
->owner
) {
1780 object_unref(mr
->owner
);
1784 uint64_t memory_region_size(MemoryRegion
*mr
)
1786 if (int128_eq(mr
->size
, int128_2_64())) {
1789 return int128_get64(mr
->size
);
1792 const char *memory_region_name(const MemoryRegion
*mr
)
1795 ((MemoryRegion
*)mr
)->name
=
1796 object_get_canonical_path_component(OBJECT(mr
));
1801 bool memory_region_is_ram_device(MemoryRegion
*mr
)
1803 return mr
->ram_device
;
1806 uint8_t memory_region_get_dirty_log_mask(MemoryRegion
*mr
)
1808 uint8_t mask
= mr
->dirty_log_mask
;
1809 if (global_dirty_log
&& mr
->ram_block
) {
1810 mask
|= (1 << DIRTY_MEMORY_MIGRATION
);
1815 bool memory_region_is_logging(MemoryRegion
*mr
, uint8_t client
)
1817 return memory_region_get_dirty_log_mask(mr
) & (1 << client
);
1820 static void memory_region_update_iommu_notify_flags(IOMMUMemoryRegion
*iommu_mr
)
1822 IOMMUNotifierFlag flags
= IOMMU_NOTIFIER_NONE
;
1823 IOMMUNotifier
*iommu_notifier
;
1824 IOMMUMemoryRegionClass
*imrc
= IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr
);
1826 IOMMU_NOTIFIER_FOREACH(iommu_notifier
, iommu_mr
) {
1827 flags
|= iommu_notifier
->notifier_flags
;
1830 if (flags
!= iommu_mr
->iommu_notify_flags
&& imrc
->notify_flag_changed
) {
1831 imrc
->notify_flag_changed(iommu_mr
,
1832 iommu_mr
->iommu_notify_flags
,
1836 iommu_mr
->iommu_notify_flags
= flags
;
1839 void memory_region_register_iommu_notifier(MemoryRegion
*mr
,
1842 IOMMUMemoryRegion
*iommu_mr
;
1845 memory_region_register_iommu_notifier(mr
->alias
, n
);
1849 /* We need to register for at least one bitfield */
1850 iommu_mr
= IOMMU_MEMORY_REGION(mr
);
1851 assert(n
->notifier_flags
!= IOMMU_NOTIFIER_NONE
);
1852 assert(n
->start
<= n
->end
);
1853 QLIST_INSERT_HEAD(&iommu_mr
->iommu_notify
, n
, node
);
1854 memory_region_update_iommu_notify_flags(iommu_mr
);
1857 uint64_t memory_region_iommu_get_min_page_size(IOMMUMemoryRegion
*iommu_mr
)
1859 IOMMUMemoryRegionClass
*imrc
= IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr
);
1861 if (imrc
->get_min_page_size
) {
1862 return imrc
->get_min_page_size(iommu_mr
);
1864 return TARGET_PAGE_SIZE
;
1867 void memory_region_iommu_replay(IOMMUMemoryRegion
*iommu_mr
, IOMMUNotifier
*n
)
1869 MemoryRegion
*mr
= MEMORY_REGION(iommu_mr
);
1870 IOMMUMemoryRegionClass
*imrc
= IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr
);
1871 hwaddr addr
, granularity
;
1872 IOMMUTLBEntry iotlb
;
1874 /* If the IOMMU has its own replay callback, override */
1876 imrc
->replay(iommu_mr
, n
);
1880 granularity
= memory_region_iommu_get_min_page_size(iommu_mr
);
1882 for (addr
= 0; addr
< memory_region_size(mr
); addr
+= granularity
) {
1883 iotlb
= imrc
->translate(iommu_mr
, addr
, IOMMU_NONE
);
1884 if (iotlb
.perm
!= IOMMU_NONE
) {
1885 n
->notify(n
, &iotlb
);
1888 /* if (2^64 - MR size) < granularity, it's possible to get an
1889 * infinite loop here. This should catch such a wraparound */
1890 if ((addr
+ granularity
) < addr
) {
1896 void memory_region_iommu_replay_all(IOMMUMemoryRegion
*iommu_mr
)
1898 IOMMUNotifier
*notifier
;
1900 IOMMU_NOTIFIER_FOREACH(notifier
, iommu_mr
) {
1901 memory_region_iommu_replay(iommu_mr
, notifier
);
1905 void memory_region_unregister_iommu_notifier(MemoryRegion
*mr
,
1908 IOMMUMemoryRegion
*iommu_mr
;
1911 memory_region_unregister_iommu_notifier(mr
->alias
, n
);
1914 QLIST_REMOVE(n
, node
);
1915 iommu_mr
= IOMMU_MEMORY_REGION(mr
);
1916 memory_region_update_iommu_notify_flags(iommu_mr
);
1919 void memory_region_notify_one(IOMMUNotifier
*notifier
,
1920 IOMMUTLBEntry
*entry
)
1922 IOMMUNotifierFlag request_flags
;
1925 * Skip the notification if the notification does not overlap
1926 * with registered range.
1928 if (notifier
->start
> entry
->iova
+ entry
->addr_mask
||
1929 notifier
->end
< entry
->iova
) {
1933 if (entry
->perm
& IOMMU_RW
) {
1934 request_flags
= IOMMU_NOTIFIER_MAP
;
1936 request_flags
= IOMMU_NOTIFIER_UNMAP
;
1939 if (notifier
->notifier_flags
& request_flags
) {
1940 notifier
->notify(notifier
, entry
);
1944 void memory_region_notify_iommu(IOMMUMemoryRegion
*iommu_mr
,
1945 IOMMUTLBEntry entry
)
1947 IOMMUNotifier
*iommu_notifier
;
1949 assert(memory_region_is_iommu(MEMORY_REGION(iommu_mr
)));
1951 IOMMU_NOTIFIER_FOREACH(iommu_notifier
, iommu_mr
) {
1952 memory_region_notify_one(iommu_notifier
, &entry
);
1956 int memory_region_iommu_get_attr(IOMMUMemoryRegion
*iommu_mr
,
1957 enum IOMMUMemoryRegionAttr attr
,
1960 IOMMUMemoryRegionClass
*imrc
= IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr
);
1962 if (!imrc
->get_attr
) {
1966 return imrc
->get_attr(iommu_mr
, attr
, data
);
1969 void memory_region_set_log(MemoryRegion
*mr
, bool log
, unsigned client
)
1971 uint8_t mask
= 1 << client
;
1972 uint8_t old_logging
;
1974 assert(client
== DIRTY_MEMORY_VGA
);
1975 old_logging
= mr
->vga_logging_count
;
1976 mr
->vga_logging_count
+= log
? 1 : -1;
1977 if (!!old_logging
== !!mr
->vga_logging_count
) {
1981 memory_region_transaction_begin();
1982 mr
->dirty_log_mask
= (mr
->dirty_log_mask
& ~mask
) | (log
* mask
);
1983 memory_region_update_pending
|= mr
->enabled
;
1984 memory_region_transaction_commit();
1987 bool memory_region_get_dirty(MemoryRegion
*mr
, hwaddr addr
,
1988 hwaddr size
, unsigned client
)
1990 assert(mr
->ram_block
);
1991 return cpu_physical_memory_get_dirty(memory_region_get_ram_addr(mr
) + addr
,
1995 void memory_region_set_dirty(MemoryRegion
*mr
, hwaddr addr
,
1998 assert(mr
->ram_block
);
1999 cpu_physical_memory_set_dirty_range(memory_region_get_ram_addr(mr
) + addr
,
2001 memory_region_get_dirty_log_mask(mr
));
2004 static void memory_region_sync_dirty_bitmap(MemoryRegion
*mr
)
2006 MemoryListener
*listener
;
2011 /* If the same address space has multiple log_sync listeners, we
2012 * visit that address space's FlatView multiple times. But because
2013 * log_sync listeners are rare, it's still cheaper than walking each
2014 * address space once.
2016 QTAILQ_FOREACH(listener
, &memory_listeners
, link
) {
2017 if (!listener
->log_sync
) {
2020 as
= listener
->address_space
;
2021 view
= address_space_get_flatview(as
);
2022 FOR_EACH_FLAT_RANGE(fr
, view
) {
2023 if (fr
->dirty_log_mask
&& (!mr
|| fr
->mr
== mr
)) {
2024 MemoryRegionSection mrs
= section_from_flat_range(fr
, view
);
2025 listener
->log_sync(listener
, &mrs
);
2028 flatview_unref(view
);
2032 DirtyBitmapSnapshot
*memory_region_snapshot_and_clear_dirty(MemoryRegion
*mr
,
2037 assert(mr
->ram_block
);
2038 memory_region_sync_dirty_bitmap(mr
);
2039 return cpu_physical_memory_snapshot_and_clear_dirty(
2040 memory_region_get_ram_addr(mr
) + addr
, size
, client
);
2043 bool memory_region_snapshot_get_dirty(MemoryRegion
*mr
, DirtyBitmapSnapshot
*snap
,
2044 hwaddr addr
, hwaddr size
)
2046 assert(mr
->ram_block
);
2047 return cpu_physical_memory_snapshot_get_dirty(snap
,
2048 memory_region_get_ram_addr(mr
) + addr
, size
);
2051 void memory_region_set_readonly(MemoryRegion
*mr
, bool readonly
)
2053 if (mr
->readonly
!= readonly
) {
2054 memory_region_transaction_begin();
2055 mr
->readonly
= readonly
;
2056 memory_region_update_pending
|= mr
->enabled
;
2057 memory_region_transaction_commit();
2061 void memory_region_rom_device_set_romd(MemoryRegion
*mr
, bool romd_mode
)
2063 if (mr
->romd_mode
!= romd_mode
) {
2064 memory_region_transaction_begin();
2065 mr
->romd_mode
= romd_mode
;
2066 memory_region_update_pending
|= mr
->enabled
;
2067 memory_region_transaction_commit();
2071 void memory_region_reset_dirty(MemoryRegion
*mr
, hwaddr addr
,
2072 hwaddr size
, unsigned client
)
2074 assert(mr
->ram_block
);
2075 cpu_physical_memory_test_and_clear_dirty(
2076 memory_region_get_ram_addr(mr
) + addr
, size
, client
);
2079 int memory_region_get_fd(MemoryRegion
*mr
)
2087 fd
= mr
->ram_block
->fd
;
2093 void *memory_region_get_ram_ptr(MemoryRegion
*mr
)
2096 uint64_t offset
= 0;
2100 offset
+= mr
->alias_offset
;
2103 assert(mr
->ram_block
);
2104 ptr
= qemu_map_ram_ptr(mr
->ram_block
, offset
);
2110 MemoryRegion
*memory_region_from_host(void *ptr
, ram_addr_t
*offset
)
2114 block
= qemu_ram_block_from_host(ptr
, false, offset
);
2122 ram_addr_t
memory_region_get_ram_addr(MemoryRegion
*mr
)
2124 return mr
->ram_block
? mr
->ram_block
->offset
: RAM_ADDR_INVALID
;
2127 void memory_region_ram_resize(MemoryRegion
*mr
, ram_addr_t newsize
, Error
**errp
)
2129 assert(mr
->ram_block
);
2131 qemu_ram_resize(mr
->ram_block
, newsize
, errp
);
2134 static void memory_region_update_coalesced_range_as(MemoryRegion
*mr
, AddressSpace
*as
)
2138 CoalescedMemoryRange
*cmr
;
2140 MemoryRegionSection section
;
2142 view
= address_space_get_flatview(as
);
2143 FOR_EACH_FLAT_RANGE(fr
, view
) {
2145 section
= (MemoryRegionSection
) {
2147 .offset_within_address_space
= int128_get64(fr
->addr
.start
),
2148 .size
= fr
->addr
.size
,
2151 MEMORY_LISTENER_CALL(as
, coalesced_mmio_del
, Reverse
, §ion
,
2152 int128_get64(fr
->addr
.start
),
2153 int128_get64(fr
->addr
.size
));
2154 QTAILQ_FOREACH(cmr
, &mr
->coalesced
, link
) {
2155 tmp
= addrrange_shift(cmr
->addr
,
2156 int128_sub(fr
->addr
.start
,
2157 int128_make64(fr
->offset_in_region
)));
2158 if (!addrrange_intersects(tmp
, fr
->addr
)) {
2161 tmp
= addrrange_intersection(tmp
, fr
->addr
);
2162 MEMORY_LISTENER_CALL(as
, coalesced_mmio_add
, Forward
, §ion
,
2163 int128_get64(tmp
.start
),
2164 int128_get64(tmp
.size
));
2168 flatview_unref(view
);
2171 static void memory_region_update_coalesced_range(MemoryRegion
*mr
)
2175 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
2176 memory_region_update_coalesced_range_as(mr
, as
);
2180 void memory_region_set_coalescing(MemoryRegion
*mr
)
2182 memory_region_clear_coalescing(mr
);
2183 memory_region_add_coalescing(mr
, 0, int128_get64(mr
->size
));
2186 void memory_region_add_coalescing(MemoryRegion
*mr
,
2190 CoalescedMemoryRange
*cmr
= g_malloc(sizeof(*cmr
));
2192 cmr
->addr
= addrrange_make(int128_make64(offset
), int128_make64(size
));
2193 QTAILQ_INSERT_TAIL(&mr
->coalesced
, cmr
, link
);
2194 memory_region_update_coalesced_range(mr
);
2195 memory_region_set_flush_coalesced(mr
);
2198 void memory_region_clear_coalescing(MemoryRegion
*mr
)
2200 CoalescedMemoryRange
*cmr
;
2201 bool updated
= false;
2203 qemu_flush_coalesced_mmio_buffer();
2204 mr
->flush_coalesced_mmio
= false;
2206 while (!QTAILQ_EMPTY(&mr
->coalesced
)) {
2207 cmr
= QTAILQ_FIRST(&mr
->coalesced
);
2208 QTAILQ_REMOVE(&mr
->coalesced
, cmr
, link
);
2214 memory_region_update_coalesced_range(mr
);
2218 void memory_region_set_flush_coalesced(MemoryRegion
*mr
)
2220 mr
->flush_coalesced_mmio
= true;
2223 void memory_region_clear_flush_coalesced(MemoryRegion
*mr
)
2225 qemu_flush_coalesced_mmio_buffer();
2226 if (QTAILQ_EMPTY(&mr
->coalesced
)) {
2227 mr
->flush_coalesced_mmio
= false;
2231 void memory_region_clear_global_locking(MemoryRegion
*mr
)
2233 mr
->global_locking
= false;
2236 static bool userspace_eventfd_warning
;
2238 void memory_region_add_eventfd(MemoryRegion
*mr
,
2245 MemoryRegionIoeventfd mrfd
= {
2246 .addr
.start
= int128_make64(addr
),
2247 .addr
.size
= int128_make64(size
),
2248 .match_data
= match_data
,
2254 if (kvm_enabled() && (!(kvm_eventfds_enabled() ||
2255 userspace_eventfd_warning
))) {
2256 userspace_eventfd_warning
= true;
2257 error_report("Using eventfd without MMIO binding in KVM. "
2258 "Suboptimal performance expected");
2262 adjust_endianness(mr
, &mrfd
.data
, size
);
2264 memory_region_transaction_begin();
2265 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
2266 if (memory_region_ioeventfd_before(mrfd
, mr
->ioeventfds
[i
])) {
2271 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
2272 sizeof(*mr
->ioeventfds
) * mr
->ioeventfd_nb
);
2273 memmove(&mr
->ioeventfds
[i
+1], &mr
->ioeventfds
[i
],
2274 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
-1 - i
));
2275 mr
->ioeventfds
[i
] = mrfd
;
2276 ioeventfd_update_pending
|= mr
->enabled
;
2277 memory_region_transaction_commit();
2280 void memory_region_del_eventfd(MemoryRegion
*mr
,
2287 MemoryRegionIoeventfd mrfd
= {
2288 .addr
.start
= int128_make64(addr
),
2289 .addr
.size
= int128_make64(size
),
2290 .match_data
= match_data
,
2297 adjust_endianness(mr
, &mrfd
.data
, size
);
2299 memory_region_transaction_begin();
2300 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
2301 if (memory_region_ioeventfd_equal(mrfd
, mr
->ioeventfds
[i
])) {
2305 assert(i
!= mr
->ioeventfd_nb
);
2306 memmove(&mr
->ioeventfds
[i
], &mr
->ioeventfds
[i
+1],
2307 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
- (i
+1)));
2309 mr
->ioeventfds
= g_realloc(mr
->ioeventfds
,
2310 sizeof(*mr
->ioeventfds
)*mr
->ioeventfd_nb
+ 1);
2311 ioeventfd_update_pending
|= mr
->enabled
;
2312 memory_region_transaction_commit();
2315 static void memory_region_update_container_subregions(MemoryRegion
*subregion
)
2317 MemoryRegion
*mr
= subregion
->container
;
2318 MemoryRegion
*other
;
2320 memory_region_transaction_begin();
2322 memory_region_ref(subregion
);
2323 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
2324 if (subregion
->priority
>= other
->priority
) {
2325 QTAILQ_INSERT_BEFORE(other
, subregion
, subregions_link
);
2329 QTAILQ_INSERT_TAIL(&mr
->subregions
, subregion
, subregions_link
);
2331 memory_region_update_pending
|= mr
->enabled
&& subregion
->enabled
;
2332 memory_region_transaction_commit();
2335 static void memory_region_add_subregion_common(MemoryRegion
*mr
,
2337 MemoryRegion
*subregion
)
2339 assert(!subregion
->container
);
2340 subregion
->container
= mr
;
2341 subregion
->addr
= offset
;
2342 memory_region_update_container_subregions(subregion
);
2345 void memory_region_add_subregion(MemoryRegion
*mr
,
2347 MemoryRegion
*subregion
)
2349 subregion
->priority
= 0;
2350 memory_region_add_subregion_common(mr
, offset
, subregion
);
2353 void memory_region_add_subregion_overlap(MemoryRegion
*mr
,
2355 MemoryRegion
*subregion
,
2358 subregion
->priority
= priority
;
2359 memory_region_add_subregion_common(mr
, offset
, subregion
);
2362 void memory_region_del_subregion(MemoryRegion
*mr
,
2363 MemoryRegion
*subregion
)
2365 memory_region_transaction_begin();
2366 assert(subregion
->container
== mr
);
2367 subregion
->container
= NULL
;
2368 QTAILQ_REMOVE(&mr
->subregions
, subregion
, subregions_link
);
2369 memory_region_unref(subregion
);
2370 memory_region_update_pending
|= mr
->enabled
&& subregion
->enabled
;
2371 memory_region_transaction_commit();
2374 void memory_region_set_enabled(MemoryRegion
*mr
, bool enabled
)
2376 if (enabled
== mr
->enabled
) {
2379 memory_region_transaction_begin();
2380 mr
->enabled
= enabled
;
2381 memory_region_update_pending
= true;
2382 memory_region_transaction_commit();
2385 void memory_region_set_size(MemoryRegion
*mr
, uint64_t size
)
2387 Int128 s
= int128_make64(size
);
2389 if (size
== UINT64_MAX
) {
2392 if (int128_eq(s
, mr
->size
)) {
2395 memory_region_transaction_begin();
2397 memory_region_update_pending
= true;
2398 memory_region_transaction_commit();
2401 static void memory_region_readd_subregion(MemoryRegion
*mr
)
2403 MemoryRegion
*container
= mr
->container
;
2406 memory_region_transaction_begin();
2407 memory_region_ref(mr
);
2408 memory_region_del_subregion(container
, mr
);
2409 mr
->container
= container
;
2410 memory_region_update_container_subregions(mr
);
2411 memory_region_unref(mr
);
2412 memory_region_transaction_commit();
2416 void memory_region_set_address(MemoryRegion
*mr
, hwaddr addr
)
2418 if (addr
!= mr
->addr
) {
2420 memory_region_readd_subregion(mr
);
2424 void memory_region_set_alias_offset(MemoryRegion
*mr
, hwaddr offset
)
2428 if (offset
== mr
->alias_offset
) {
2432 memory_region_transaction_begin();
2433 mr
->alias_offset
= offset
;
2434 memory_region_update_pending
|= mr
->enabled
;
2435 memory_region_transaction_commit();
2438 uint64_t memory_region_get_alignment(const MemoryRegion
*mr
)
2443 static int cmp_flatrange_addr(const void *addr_
, const void *fr_
)
2445 const AddrRange
*addr
= addr_
;
2446 const FlatRange
*fr
= fr_
;
2448 if (int128_le(addrrange_end(*addr
), fr
->addr
.start
)) {
2450 } else if (int128_ge(addr
->start
, addrrange_end(fr
->addr
))) {
2456 static FlatRange
*flatview_lookup(FlatView
*view
, AddrRange addr
)
2458 return bsearch(&addr
, view
->ranges
, view
->nr
,
2459 sizeof(FlatRange
), cmp_flatrange_addr
);
2462 bool memory_region_is_mapped(MemoryRegion
*mr
)
2464 return mr
->container
? true : false;
2467 /* Same as memory_region_find, but it does not add a reference to the
2468 * returned region. It must be called from an RCU critical section.
2470 static MemoryRegionSection
memory_region_find_rcu(MemoryRegion
*mr
,
2471 hwaddr addr
, uint64_t size
)
2473 MemoryRegionSection ret
= { .mr
= NULL
};
2481 for (root
= mr
; root
->container
; ) {
2482 root
= root
->container
;
2486 as
= memory_region_to_address_space(root
);
2490 range
= addrrange_make(int128_make64(addr
), int128_make64(size
));
2492 view
= address_space_to_flatview(as
);
2493 fr
= flatview_lookup(view
, range
);
2498 while (fr
> view
->ranges
&& addrrange_intersects(fr
[-1].addr
, range
)) {
2504 range
= addrrange_intersection(range
, fr
->addr
);
2505 ret
.offset_within_region
= fr
->offset_in_region
;
2506 ret
.offset_within_region
+= int128_get64(int128_sub(range
.start
,
2508 ret
.size
= range
.size
;
2509 ret
.offset_within_address_space
= int128_get64(range
.start
);
2510 ret
.readonly
= fr
->readonly
;
2514 MemoryRegionSection
memory_region_find(MemoryRegion
*mr
,
2515 hwaddr addr
, uint64_t size
)
2517 MemoryRegionSection ret
;
2519 ret
= memory_region_find_rcu(mr
, addr
, size
);
2521 memory_region_ref(ret
.mr
);
2527 bool memory_region_present(MemoryRegion
*container
, hwaddr addr
)
2532 mr
= memory_region_find_rcu(container
, addr
, 1).mr
;
2534 return mr
&& mr
!= container
;
2537 void memory_global_dirty_log_sync(void)
2539 memory_region_sync_dirty_bitmap(NULL
);
2542 static VMChangeStateEntry
*vmstate_change
;
2544 void memory_global_dirty_log_start(void)
2546 if (vmstate_change
) {
2547 qemu_del_vm_change_state_handler(vmstate_change
);
2548 vmstate_change
= NULL
;
2551 global_dirty_log
= true;
2553 MEMORY_LISTENER_CALL_GLOBAL(log_global_start
, Forward
);
2555 /* Refresh DIRTY_LOG_MIGRATION bit. */
2556 memory_region_transaction_begin();
2557 memory_region_update_pending
= true;
2558 memory_region_transaction_commit();
2561 static void memory_global_dirty_log_do_stop(void)
2563 global_dirty_log
= false;
2565 /* Refresh DIRTY_LOG_MIGRATION bit. */
2566 memory_region_transaction_begin();
2567 memory_region_update_pending
= true;
2568 memory_region_transaction_commit();
2570 MEMORY_LISTENER_CALL_GLOBAL(log_global_stop
, Reverse
);
2573 static void memory_vm_change_state_handler(void *opaque
, int running
,
2577 memory_global_dirty_log_do_stop();
2579 if (vmstate_change
) {
2580 qemu_del_vm_change_state_handler(vmstate_change
);
2581 vmstate_change
= NULL
;
2586 void memory_global_dirty_log_stop(void)
2588 if (!runstate_is_running()) {
2589 if (vmstate_change
) {
2592 vmstate_change
= qemu_add_vm_change_state_handler(
2593 memory_vm_change_state_handler
, NULL
);
2597 memory_global_dirty_log_do_stop();
2600 static void listener_add_address_space(MemoryListener
*listener
,
2606 if (listener
->begin
) {
2607 listener
->begin(listener
);
2609 if (global_dirty_log
) {
2610 if (listener
->log_global_start
) {
2611 listener
->log_global_start(listener
);
2615 view
= address_space_get_flatview(as
);
2616 FOR_EACH_FLAT_RANGE(fr
, view
) {
2617 MemoryRegionSection section
= section_from_flat_range(fr
, view
);
2619 if (listener
->region_add
) {
2620 listener
->region_add(listener
, §ion
);
2622 if (fr
->dirty_log_mask
&& listener
->log_start
) {
2623 listener
->log_start(listener
, §ion
, 0, fr
->dirty_log_mask
);
2626 if (listener
->commit
) {
2627 listener
->commit(listener
);
2629 flatview_unref(view
);
2632 static void listener_del_address_space(MemoryListener
*listener
,
2638 if (listener
->begin
) {
2639 listener
->begin(listener
);
2641 view
= address_space_get_flatview(as
);
2642 FOR_EACH_FLAT_RANGE(fr
, view
) {
2643 MemoryRegionSection section
= section_from_flat_range(fr
, view
);
2645 if (fr
->dirty_log_mask
&& listener
->log_stop
) {
2646 listener
->log_stop(listener
, §ion
, fr
->dirty_log_mask
, 0);
2648 if (listener
->region_del
) {
2649 listener
->region_del(listener
, §ion
);
2652 if (listener
->commit
) {
2653 listener
->commit(listener
);
2655 flatview_unref(view
);
2658 void memory_listener_register(MemoryListener
*listener
, AddressSpace
*as
)
2660 MemoryListener
*other
= NULL
;
2662 listener
->address_space
= as
;
2663 if (QTAILQ_EMPTY(&memory_listeners
)
2664 || listener
->priority
>= QTAILQ_LAST(&memory_listeners
,
2665 memory_listeners
)->priority
) {
2666 QTAILQ_INSERT_TAIL(&memory_listeners
, listener
, link
);
2668 QTAILQ_FOREACH(other
, &memory_listeners
, link
) {
2669 if (listener
->priority
< other
->priority
) {
2673 QTAILQ_INSERT_BEFORE(other
, listener
, link
);
2676 if (QTAILQ_EMPTY(&as
->listeners
)
2677 || listener
->priority
>= QTAILQ_LAST(&as
->listeners
,
2678 memory_listeners
)->priority
) {
2679 QTAILQ_INSERT_TAIL(&as
->listeners
, listener
, link_as
);
2681 QTAILQ_FOREACH(other
, &as
->listeners
, link_as
) {
2682 if (listener
->priority
< other
->priority
) {
2686 QTAILQ_INSERT_BEFORE(other
, listener
, link_as
);
2689 listener_add_address_space(listener
, as
);
2692 void memory_listener_unregister(MemoryListener
*listener
)
2694 if (!listener
->address_space
) {
2698 listener_del_address_space(listener
, listener
->address_space
);
2699 QTAILQ_REMOVE(&memory_listeners
, listener
, link
);
2700 QTAILQ_REMOVE(&listener
->address_space
->listeners
, listener
, link_as
);
2701 listener
->address_space
= NULL
;
2704 bool memory_region_request_mmio_ptr(MemoryRegion
*mr
, hwaddr addr
)
2708 unsigned offset
= 0;
2709 Object
*new_interface
;
2711 if (!mr
|| !mr
->ops
->request_ptr
) {
2716 * Avoid an update if the request_ptr call
2717 * memory_region_invalidate_mmio_ptr which seems to be likely when we use
2720 memory_region_transaction_begin();
2722 host
= mr
->ops
->request_ptr(mr
->opaque
, addr
- mr
->addr
, &size
, &offset
);
2724 if (!host
|| !size
) {
2725 memory_region_transaction_commit();
2729 new_interface
= object_new("mmio_interface");
2730 qdev_prop_set_uint64(DEVICE(new_interface
), "start", offset
);
2731 qdev_prop_set_uint64(DEVICE(new_interface
), "end", offset
+ size
- 1);
2732 qdev_prop_set_bit(DEVICE(new_interface
), "ro", true);
2733 qdev_prop_set_ptr(DEVICE(new_interface
), "host_ptr", host
);
2734 qdev_prop_set_ptr(DEVICE(new_interface
), "subregion", mr
);
2735 object_property_set_bool(OBJECT(new_interface
), true, "realized", NULL
);
2737 memory_region_transaction_commit();
2741 typedef struct MMIOPtrInvalidate
{
2747 } MMIOPtrInvalidate
;
2749 #define MAX_MMIO_INVALIDATE 10
2750 static MMIOPtrInvalidate mmio_ptr_invalidate_list
[MAX_MMIO_INVALIDATE
];
2752 static void memory_region_do_invalidate_mmio_ptr(CPUState
*cpu
,
2753 run_on_cpu_data data
)
2755 MMIOPtrInvalidate
*invalidate_data
= (MMIOPtrInvalidate
*)data
.host_ptr
;
2756 MemoryRegion
*mr
= invalidate_data
->mr
;
2757 hwaddr offset
= invalidate_data
->offset
;
2758 unsigned size
= invalidate_data
->size
;
2759 MemoryRegionSection section
= memory_region_find(mr
, offset
, size
);
2761 qemu_mutex_lock_iothread();
2763 /* Reset dirty so this doesn't happen later. */
2764 cpu_physical_memory_test_and_clear_dirty(offset
, size
, 1);
2766 if (section
.mr
!= mr
) {
2767 /* memory_region_find add a ref on section.mr */
2768 memory_region_unref(section
.mr
);
2769 if (MMIO_INTERFACE(section
.mr
->owner
)) {
2770 /* We found the interface just drop it. */
2771 object_property_set_bool(section
.mr
->owner
, false, "realized",
2773 object_unref(section
.mr
->owner
);
2774 object_unparent(section
.mr
->owner
);
2778 qemu_mutex_unlock_iothread();
2780 if (invalidate_data
->allocated
) {
2781 g_free(invalidate_data
);
2783 invalidate_data
->busy
= 0;
2787 void memory_region_invalidate_mmio_ptr(MemoryRegion
*mr
, hwaddr offset
,
2791 MMIOPtrInvalidate
*invalidate_data
= NULL
;
2793 for (i
= 0; i
< MAX_MMIO_INVALIDATE
; i
++) {
2794 if (atomic_cmpxchg(&(mmio_ptr_invalidate_list
[i
].busy
), 0, 1) == 0) {
2795 invalidate_data
= &mmio_ptr_invalidate_list
[i
];
2800 if (!invalidate_data
) {
2801 invalidate_data
= g_malloc0(sizeof(MMIOPtrInvalidate
));
2802 invalidate_data
->allocated
= 1;
2805 invalidate_data
->mr
= mr
;
2806 invalidate_data
->offset
= offset
;
2807 invalidate_data
->size
= size
;
2809 async_safe_run_on_cpu(first_cpu
, memory_region_do_invalidate_mmio_ptr
,
2810 RUN_ON_CPU_HOST_PTR(invalidate_data
));
2813 void address_space_init(AddressSpace
*as
, MemoryRegion
*root
, const char *name
)
2815 memory_region_ref(root
);
2817 as
->current_map
= NULL
;
2818 as
->ioeventfd_nb
= 0;
2819 as
->ioeventfds
= NULL
;
2820 QTAILQ_INIT(&as
->listeners
);
2821 QTAILQ_INSERT_TAIL(&address_spaces
, as
, address_spaces_link
);
2822 as
->name
= g_strdup(name
? name
: "anonymous");
2823 address_space_update_topology(as
);
2824 address_space_update_ioeventfds(as
);
2827 static void do_address_space_destroy(AddressSpace
*as
)
2829 assert(QTAILQ_EMPTY(&as
->listeners
));
2831 flatview_unref(as
->current_map
);
2833 g_free(as
->ioeventfds
);
2834 memory_region_unref(as
->root
);
2837 void address_space_destroy(AddressSpace
*as
)
2839 MemoryRegion
*root
= as
->root
;
2841 /* Flush out anything from MemoryListeners listening in on this */
2842 memory_region_transaction_begin();
2844 memory_region_transaction_commit();
2845 QTAILQ_REMOVE(&address_spaces
, as
, address_spaces_link
);
2847 /* At this point, as->dispatch and as->current_map are dummy
2848 * entries that the guest should never use. Wait for the old
2849 * values to expire before freeing the data.
2852 call_rcu(as
, do_address_space_destroy
, rcu
);
2855 static const char *memory_region_type(MemoryRegion
*mr
)
2857 if (memory_region_is_ram_device(mr
)) {
2859 } else if (memory_region_is_romd(mr
)) {
2861 } else if (memory_region_is_rom(mr
)) {
2863 } else if (memory_region_is_ram(mr
)) {
2870 typedef struct MemoryRegionList MemoryRegionList
;
2872 struct MemoryRegionList
{
2873 const MemoryRegion
*mr
;
2874 QTAILQ_ENTRY(MemoryRegionList
) mrqueue
;
2877 typedef QTAILQ_HEAD(mrqueue
, MemoryRegionList
) MemoryRegionListHead
;
2879 #define MR_SIZE(size) (int128_nz(size) ? (hwaddr)int128_get64( \
2880 int128_sub((size), int128_one())) : 0)
2881 #define MTREE_INDENT " "
2883 static void mtree_print_mr(fprintf_function mon_printf
, void *f
,
2884 const MemoryRegion
*mr
, unsigned int level
,
2886 MemoryRegionListHead
*alias_print_queue
)
2888 MemoryRegionList
*new_ml
, *ml
, *next_ml
;
2889 MemoryRegionListHead submr_print_queue
;
2890 const MemoryRegion
*submr
;
2892 hwaddr cur_start
, cur_end
;
2898 for (i
= 0; i
< level
; i
++) {
2899 mon_printf(f
, MTREE_INDENT
);
2902 cur_start
= base
+ mr
->addr
;
2903 cur_end
= cur_start
+ MR_SIZE(mr
->size
);
2906 * Try to detect overflow of memory region. This should never
2907 * happen normally. When it happens, we dump something to warn the
2908 * user who is observing this.
2910 if (cur_start
< base
|| cur_end
< cur_start
) {
2911 mon_printf(f
, "[DETECTED OVERFLOW!] ");
2915 MemoryRegionList
*ml
;
2918 /* check if the alias is already in the queue */
2919 QTAILQ_FOREACH(ml
, alias_print_queue
, mrqueue
) {
2920 if (ml
->mr
== mr
->alias
) {
2926 ml
= g_new(MemoryRegionList
, 1);
2928 QTAILQ_INSERT_TAIL(alias_print_queue
, ml
, mrqueue
);
2930 mon_printf(f
, TARGET_FMT_plx
"-" TARGET_FMT_plx
2931 " (prio %d, %s): alias %s @%s " TARGET_FMT_plx
2932 "-" TARGET_FMT_plx
"%s\n",
2935 memory_region_type((MemoryRegion
*)mr
),
2936 memory_region_name(mr
),
2937 memory_region_name(mr
->alias
),
2939 mr
->alias_offset
+ MR_SIZE(mr
->size
),
2940 mr
->enabled
? "" : " [disabled]");
2943 TARGET_FMT_plx
"-" TARGET_FMT_plx
" (prio %d, %s): %s%s\n",
2946 memory_region_type((MemoryRegion
*)mr
),
2947 memory_region_name(mr
),
2948 mr
->enabled
? "" : " [disabled]");
2951 QTAILQ_INIT(&submr_print_queue
);
2953 QTAILQ_FOREACH(submr
, &mr
->subregions
, subregions_link
) {
2954 new_ml
= g_new(MemoryRegionList
, 1);
2956 QTAILQ_FOREACH(ml
, &submr_print_queue
, mrqueue
) {
2957 if (new_ml
->mr
->addr
< ml
->mr
->addr
||
2958 (new_ml
->mr
->addr
== ml
->mr
->addr
&&
2959 new_ml
->mr
->priority
> ml
->mr
->priority
)) {
2960 QTAILQ_INSERT_BEFORE(ml
, new_ml
, mrqueue
);
2966 QTAILQ_INSERT_TAIL(&submr_print_queue
, new_ml
, mrqueue
);
2970 QTAILQ_FOREACH(ml
, &submr_print_queue
, mrqueue
) {
2971 mtree_print_mr(mon_printf
, f
, ml
->mr
, level
+ 1, cur_start
,
2975 QTAILQ_FOREACH_SAFE(ml
, &submr_print_queue
, mrqueue
, next_ml
) {
2980 struct FlatViewInfo
{
2981 fprintf_function mon_printf
;
2987 static void mtree_print_flatview(gpointer key
, gpointer value
,
2990 FlatView
*view
= key
;
2991 GArray
*fv_address_spaces
= value
;
2992 struct FlatViewInfo
*fvi
= user_data
;
2993 fprintf_function p
= fvi
->mon_printf
;
2995 FlatRange
*range
= &view
->ranges
[0];
3001 p(f
, "FlatView #%d\n", fvi
->counter
);
3004 for (i
= 0; i
< fv_address_spaces
->len
; ++i
) {
3005 as
= g_array_index(fv_address_spaces
, AddressSpace
*, i
);
3006 p(f
, " AS \"%s\", root: %s", as
->name
, memory_region_name(as
->root
));
3007 if (as
->root
->alias
) {
3008 p(f
, ", alias %s", memory_region_name(as
->root
->alias
));
3013 p(f
, " Root memory region: %s\n",
3014 view
->root
? memory_region_name(view
->root
) : "(none)");
3017 p(f
, MTREE_INDENT
"No rendered FlatView\n\n");
3023 if (range
->offset_in_region
) {
3024 p(f
, MTREE_INDENT TARGET_FMT_plx
"-"
3025 TARGET_FMT_plx
" (prio %d, %s): %s @" TARGET_FMT_plx
"\n",
3026 int128_get64(range
->addr
.start
),
3027 int128_get64(range
->addr
.start
) + MR_SIZE(range
->addr
.size
),
3029 range
->readonly
? "rom" : memory_region_type(mr
),
3030 memory_region_name(mr
),
3031 range
->offset_in_region
);
3033 p(f
, MTREE_INDENT TARGET_FMT_plx
"-"
3034 TARGET_FMT_plx
" (prio %d, %s): %s\n",
3035 int128_get64(range
->addr
.start
),
3036 int128_get64(range
->addr
.start
) + MR_SIZE(range
->addr
.size
),
3038 range
->readonly
? "rom" : memory_region_type(mr
),
3039 memory_region_name(mr
));
3044 #if !defined(CONFIG_USER_ONLY)
3045 if (fvi
->dispatch_tree
&& view
->root
) {
3046 mtree_print_dispatch(p
, f
, view
->dispatch
, view
->root
);
3053 static gboolean
mtree_info_flatview_free(gpointer key
, gpointer value
,
3056 FlatView
*view
= key
;
3057 GArray
*fv_address_spaces
= value
;
3059 g_array_unref(fv_address_spaces
);
3060 flatview_unref(view
);
3065 void mtree_info(fprintf_function mon_printf
, void *f
, bool flatview
,
3068 MemoryRegionListHead ml_head
;
3069 MemoryRegionList
*ml
, *ml2
;
3074 struct FlatViewInfo fvi
= {
3075 .mon_printf
= mon_printf
,
3078 .dispatch_tree
= dispatch_tree
3080 GArray
*fv_address_spaces
;
3081 GHashTable
*views
= g_hash_table_new(g_direct_hash
, g_direct_equal
);
3083 /* Gather all FVs in one table */
3084 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
3085 view
= address_space_get_flatview(as
);
3087 fv_address_spaces
= g_hash_table_lookup(views
, view
);
3088 if (!fv_address_spaces
) {
3089 fv_address_spaces
= g_array_new(false, false, sizeof(as
));
3090 g_hash_table_insert(views
, view
, fv_address_spaces
);
3093 g_array_append_val(fv_address_spaces
, as
);
3097 g_hash_table_foreach(views
, mtree_print_flatview
, &fvi
);
3100 g_hash_table_foreach_remove(views
, mtree_info_flatview_free
, 0);
3101 g_hash_table_unref(views
);
3106 QTAILQ_INIT(&ml_head
);
3108 QTAILQ_FOREACH(as
, &address_spaces
, address_spaces_link
) {
3109 mon_printf(f
, "address-space: %s\n", as
->name
);
3110 mtree_print_mr(mon_printf
, f
, as
->root
, 1, 0, &ml_head
);
3111 mon_printf(f
, "\n");
3114 /* print aliased regions */
3115 QTAILQ_FOREACH(ml
, &ml_head
, mrqueue
) {
3116 mon_printf(f
, "memory-region: %s\n", memory_region_name(ml
->mr
));
3117 mtree_print_mr(mon_printf
, f
, ml
->mr
, 1, 0, &ml_head
);
3118 mon_printf(f
, "\n");
3121 QTAILQ_FOREACH_SAFE(ml
, &ml_head
, mrqueue
, ml2
) {
3126 void memory_region_init_ram(MemoryRegion
*mr
,
3127 struct Object
*owner
,
3132 DeviceState
*owner_dev
;
3135 memory_region_init_ram_nomigrate(mr
, owner
, name
, size
, &err
);
3137 error_propagate(errp
, err
);
3140 /* This will assert if owner is neither NULL nor a DeviceState.
3141 * We only want the owner here for the purposes of defining a
3142 * unique name for migration. TODO: Ideally we should implement
3143 * a naming scheme for Objects which are not DeviceStates, in
3144 * which case we can relax this restriction.
3146 owner_dev
= DEVICE(owner
);
3147 vmstate_register_ram(mr
, owner_dev
);
3150 void memory_region_init_rom(MemoryRegion
*mr
,
3151 struct Object
*owner
,
3156 DeviceState
*owner_dev
;
3159 memory_region_init_rom_nomigrate(mr
, owner
, name
, size
, &err
);
3161 error_propagate(errp
, err
);
3164 /* This will assert if owner is neither NULL nor a DeviceState.
3165 * We only want the owner here for the purposes of defining a
3166 * unique name for migration. TODO: Ideally we should implement
3167 * a naming scheme for Objects which are not DeviceStates, in
3168 * which case we can relax this restriction.
3170 owner_dev
= DEVICE(owner
);
3171 vmstate_register_ram(mr
, owner_dev
);
3174 void memory_region_init_rom_device(MemoryRegion
*mr
,
3175 struct Object
*owner
,
3176 const MemoryRegionOps
*ops
,
3182 DeviceState
*owner_dev
;
3185 memory_region_init_rom_device_nomigrate(mr
, owner
, ops
, opaque
,
3188 error_propagate(errp
, err
);
3191 /* This will assert if owner is neither NULL nor a DeviceState.
3192 * We only want the owner here for the purposes of defining a
3193 * unique name for migration. TODO: Ideally we should implement
3194 * a naming scheme for Objects which are not DeviceStates, in
3195 * which case we can relax this restriction.
3197 owner_dev
= DEVICE(owner
);
3198 vmstate_register_ram(mr
, owner_dev
);
3201 static const TypeInfo memory_region_info
= {
3202 .parent
= TYPE_OBJECT
,
3203 .name
= TYPE_MEMORY_REGION
,
3204 .instance_size
= sizeof(MemoryRegion
),
3205 .instance_init
= memory_region_initfn
,
3206 .instance_finalize
= memory_region_finalize
,
3209 static const TypeInfo iommu_memory_region_info
= {
3210 .parent
= TYPE_MEMORY_REGION
,
3211 .name
= TYPE_IOMMU_MEMORY_REGION
,
3212 .class_size
= sizeof(IOMMUMemoryRegionClass
),
3213 .instance_size
= sizeof(IOMMUMemoryRegion
),
3214 .instance_init
= iommu_memory_region_initfn
,
3218 static void memory_register_types(void)
3220 type_register_static(&memory_region_info
);
3221 type_register_static(&iommu_memory_region_info
);
3224 type_init(memory_register_types
)