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.
15 #include "exec-memory.h"
21 unsigned memory_region_transaction_depth
= 0;
23 typedef struct AddrRange AddrRange
;
26 * Note using signed integers limits us to physical addresses at most
27 * 63 bits wide. They are needed for negative offsetting in aliases
28 * (large MemoryRegion::alias_offset).
35 static AddrRange
addrrange_make(int64_t start
, int64_t size
)
37 return (AddrRange
) { start
, size
};
40 static bool addrrange_equal(AddrRange r1
, AddrRange r2
)
42 return r1
.start
== r2
.start
&& r1
.size
== r2
.size
;
45 static int64_t addrrange_end(AddrRange r
)
47 return r
.start
+ r
.size
;
50 static AddrRange
addrrange_shift(AddrRange range
, int64_t delta
)
56 static bool addrrange_intersects(AddrRange r1
, AddrRange r2
)
58 return (r1
.start
>= r2
.start
&& r1
.start
< r2
.start
+ r2
.size
)
59 || (r2
.start
>= r1
.start
&& r2
.start
< r1
.start
+ r1
.size
);
62 static AddrRange
addrrange_intersection(AddrRange r1
, AddrRange r2
)
64 int64_t start
= MAX(r1
.start
, r2
.start
);
65 /* off-by-one arithmetic to prevent overflow */
66 int64_t end
= MIN(addrrange_end(r1
) - 1, addrrange_end(r2
) - 1);
67 return addrrange_make(start
, end
- start
+ 1);
70 struct CoalescedMemoryRange
{
72 QTAILQ_ENTRY(CoalescedMemoryRange
) link
;
75 struct MemoryRegionIoeventfd
{
82 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a
,
83 MemoryRegionIoeventfd b
)
85 if (a
.addr
.start
< b
.addr
.start
) {
87 } else if (a
.addr
.start
> b
.addr
.start
) {
89 } else if (a
.addr
.size
< b
.addr
.size
) {
91 } else if (a
.addr
.size
> b
.addr
.size
) {
93 } else if (a
.match_data
< b
.match_data
) {
95 } else if (a
.match_data
> b
.match_data
) {
97 } else if (a
.match_data
) {
98 if (a
.data
< b
.data
) {
100 } else if (a
.data
> b
.data
) {
106 } else if (a
.fd
> b
.fd
) {
112 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a
,
113 MemoryRegionIoeventfd b
)
115 return !memory_region_ioeventfd_before(a
, b
)
116 && !memory_region_ioeventfd_before(b
, a
);
119 typedef struct FlatRange FlatRange
;
120 typedef struct FlatView FlatView
;
122 /* Range of memory in the global map. Addresses are absolute. */
125 target_phys_addr_t offset_in_region
;
127 uint8_t dirty_log_mask
;
130 /* Flattened global view of current active memory hierarchy. Kept in sorted
136 unsigned nr_allocated
;
139 typedef struct AddressSpace AddressSpace
;
140 typedef struct AddressSpaceOps AddressSpaceOps
;
142 /* A system address space - I/O, memory, etc. */
143 struct AddressSpace
{
144 const AddressSpaceOps
*ops
;
146 FlatView current_map
;
148 MemoryRegionIoeventfd
*ioeventfds
;
151 struct AddressSpaceOps
{
152 void (*range_add
)(AddressSpace
*as
, FlatRange
*fr
);
153 void (*range_del
)(AddressSpace
*as
, FlatRange
*fr
);
154 void (*log_start
)(AddressSpace
*as
, FlatRange
*fr
);
155 void (*log_stop
)(AddressSpace
*as
, FlatRange
*fr
);
156 void (*ioeventfd_add
)(AddressSpace
*as
, MemoryRegionIoeventfd
*fd
);
157 void (*ioeventfd_del
)(AddressSpace
*as
, MemoryRegionIoeventfd
*fd
);
160 #define FOR_EACH_FLAT_RANGE(var, view) \
161 for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
163 static bool flatrange_equal(FlatRange
*a
, FlatRange
*b
)
165 return a
->mr
== b
->mr
166 && addrrange_equal(a
->addr
, b
->addr
)
167 && a
->offset_in_region
== b
->offset_in_region
;
170 static void flatview_init(FlatView
*view
)
174 view
->nr_allocated
= 0;
177 /* Insert a range into a given position. Caller is responsible for maintaining
180 static void flatview_insert(FlatView
*view
, unsigned pos
, FlatRange
*range
)
182 if (view
->nr
== view
->nr_allocated
) {
183 view
->nr_allocated
= MAX(2 * view
->nr
, 10);
184 view
->ranges
= qemu_realloc(view
->ranges
,
185 view
->nr_allocated
* sizeof(*view
->ranges
));
187 memmove(view
->ranges
+ pos
+ 1, view
->ranges
+ pos
,
188 (view
->nr
- pos
) * sizeof(FlatRange
));
189 view
->ranges
[pos
] = *range
;
193 static void flatview_destroy(FlatView
*view
)
195 qemu_free(view
->ranges
);
198 static bool can_merge(FlatRange
*r1
, FlatRange
*r2
)
200 return addrrange_end(r1
->addr
) == r2
->addr
.start
202 && r1
->offset_in_region
+ r1
->addr
.size
== r2
->offset_in_region
203 && r1
->dirty_log_mask
== r2
->dirty_log_mask
;
206 /* Attempt to simplify a view by merging ajacent ranges */
207 static void flatview_simplify(FlatView
*view
)
212 while (i
< view
->nr
) {
215 && can_merge(&view
->ranges
[j
-1], &view
->ranges
[j
])) {
216 view
->ranges
[i
].addr
.size
+= view
->ranges
[j
].addr
.size
;
220 memmove(&view
->ranges
[i
], &view
->ranges
[j
],
221 (view
->nr
- j
) * sizeof(view
->ranges
[j
]));
226 static void memory_region_prepare_ram_addr(MemoryRegion
*mr
);
228 static void as_memory_range_add(AddressSpace
*as
, FlatRange
*fr
)
230 ram_addr_t phys_offset
, region_offset
;
232 memory_region_prepare_ram_addr(fr
->mr
);
234 phys_offset
= fr
->mr
->ram_addr
;
235 region_offset
= fr
->offset_in_region
;
236 /* cpu_register_physical_memory_log() wants region_offset for
237 * mmio, but prefers offseting phys_offset for RAM. Humour it.
239 if ((phys_offset
& ~TARGET_PAGE_MASK
) <= IO_MEM_ROM
) {
240 phys_offset
+= region_offset
;
244 cpu_register_physical_memory_log(fr
->addr
.start
,
251 static void as_memory_range_del(AddressSpace
*as
, FlatRange
*fr
)
253 if (fr
->dirty_log_mask
) {
254 cpu_physical_sync_dirty_bitmap(fr
->addr
.start
,
255 fr
->addr
.start
+ fr
->addr
.size
);
257 cpu_register_physical_memory(fr
->addr
.start
, fr
->addr
.size
,
261 static void as_memory_log_start(AddressSpace
*as
, FlatRange
*fr
)
263 cpu_physical_log_start(fr
->addr
.start
, fr
->addr
.size
);
266 static void as_memory_log_stop(AddressSpace
*as
, FlatRange
*fr
)
268 cpu_physical_log_stop(fr
->addr
.start
, fr
->addr
.size
);
271 static void as_memory_ioeventfd_add(AddressSpace
*as
, MemoryRegionIoeventfd
*fd
)
275 assert(fd
->match_data
&& fd
->addr
.size
== 4);
277 r
= kvm_set_ioeventfd_mmio_long(fd
->fd
, fd
->addr
.start
, fd
->data
, true);
283 static void as_memory_ioeventfd_del(AddressSpace
*as
, MemoryRegionIoeventfd
*fd
)
287 r
= kvm_set_ioeventfd_mmio_long(fd
->fd
, fd
->addr
.start
, fd
->data
, false);
293 static const AddressSpaceOps address_space_ops_memory
= {
294 .range_add
= as_memory_range_add
,
295 .range_del
= as_memory_range_del
,
296 .log_start
= as_memory_log_start
,
297 .log_stop
= as_memory_log_stop
,
298 .ioeventfd_add
= as_memory_ioeventfd_add
,
299 .ioeventfd_del
= as_memory_ioeventfd_del
,
302 static AddressSpace address_space_memory
= {
303 .ops
= &address_space_ops_memory
,
306 static const MemoryRegionPortio
*find_portio(MemoryRegion
*mr
, uint64_t offset
,
307 unsigned width
, bool write
)
309 const MemoryRegionPortio
*mrp
;
311 for (mrp
= mr
->ops
->old_portio
; mrp
->size
; ++mrp
) {
312 if (offset
>= mrp
->offset
&& offset
< mrp
->offset
+ mrp
->len
313 && width
== mrp
->size
314 && (write
? (bool)mrp
->write
: (bool)mrp
->read
)) {
321 static void memory_region_iorange_read(IORange
*iorange
,
326 MemoryRegion
*mr
= container_of(iorange
, MemoryRegion
, iorange
);
328 if (mr
->ops
->old_portio
) {
329 const MemoryRegionPortio
*mrp
= find_portio(mr
, offset
, width
, false);
331 *data
= ((uint64_t)1 << (width
* 8)) - 1;
333 *data
= mrp
->read(mr
->opaque
, offset
- mrp
->offset
);
337 *data
= mr
->ops
->read(mr
->opaque
, offset
, width
);
340 static void memory_region_iorange_write(IORange
*iorange
,
345 MemoryRegion
*mr
= container_of(iorange
, MemoryRegion
, iorange
);
347 if (mr
->ops
->old_portio
) {
348 const MemoryRegionPortio
*mrp
= find_portio(mr
, offset
, width
, true);
351 mrp
->write(mr
->opaque
, offset
- mrp
->offset
, data
);
355 mr
->ops
->write(mr
->opaque
, offset
, data
, width
);
358 static const IORangeOps memory_region_iorange_ops
= {
359 .read
= memory_region_iorange_read
,
360 .write
= memory_region_iorange_write
,
363 static void as_io_range_add(AddressSpace
*as
, FlatRange
*fr
)
365 iorange_init(&fr
->mr
->iorange
, &memory_region_iorange_ops
,
366 fr
->addr
.start
,fr
->addr
.size
);
367 ioport_register(&fr
->mr
->iorange
);
370 static void as_io_range_del(AddressSpace
*as
, FlatRange
*fr
)
372 isa_unassign_ioport(fr
->addr
.start
, fr
->addr
.size
);
375 static void as_io_ioeventfd_add(AddressSpace
*as
, MemoryRegionIoeventfd
*fd
)
379 assert(fd
->match_data
&& fd
->addr
.size
== 2);
381 r
= kvm_set_ioeventfd_pio_word(fd
->fd
, fd
->addr
.start
, fd
->data
, true);
387 static void as_io_ioeventfd_del(AddressSpace
*as
, MemoryRegionIoeventfd
*fd
)
391 r
= kvm_set_ioeventfd_pio_word(fd
->fd
, fd
->addr
.start
, fd
->data
, false);
397 static const AddressSpaceOps address_space_ops_io
= {
398 .range_add
= as_io_range_add
,
399 .range_del
= as_io_range_del
,
400 .ioeventfd_add
= as_io_ioeventfd_add
,
401 .ioeventfd_del
= as_io_ioeventfd_del
,
404 static AddressSpace address_space_io
= {
405 .ops
= &address_space_ops_io
,
408 /* Render a memory region into the global view. Ranges in @view obscure
411 static void render_memory_region(FlatView
*view
,
413 target_phys_addr_t base
,
416 MemoryRegion
*subregion
;
418 target_phys_addr_t offset_in_region
;
426 tmp
= addrrange_make(base
, mr
->size
);
428 if (!addrrange_intersects(tmp
, clip
)) {
432 clip
= addrrange_intersection(tmp
, clip
);
435 base
-= mr
->alias
->addr
;
436 base
-= mr
->alias_offset
;
437 render_memory_region(view
, mr
->alias
, base
, clip
);
441 /* Render subregions in priority order. */
442 QTAILQ_FOREACH(subregion
, &mr
->subregions
, subregions_link
) {
443 render_memory_region(view
, subregion
, base
, clip
);
446 if (!mr
->terminates
) {
450 offset_in_region
= clip
.start
- base
;
454 /* Render the region itself into any gaps left by the current view. */
455 for (i
= 0; i
< view
->nr
&& remain
; ++i
) {
456 if (base
>= addrrange_end(view
->ranges
[i
].addr
)) {
459 if (base
< view
->ranges
[i
].addr
.start
) {
460 now
= MIN(remain
, view
->ranges
[i
].addr
.start
- base
);
462 fr
.offset_in_region
= offset_in_region
;
463 fr
.addr
= addrrange_make(base
, now
);
464 fr
.dirty_log_mask
= mr
->dirty_log_mask
;
465 flatview_insert(view
, i
, &fr
);
468 offset_in_region
+= now
;
471 if (base
== view
->ranges
[i
].addr
.start
) {
472 now
= MIN(remain
, view
->ranges
[i
].addr
.size
);
474 offset_in_region
+= now
;
480 fr
.offset_in_region
= offset_in_region
;
481 fr
.addr
= addrrange_make(base
, remain
);
482 fr
.dirty_log_mask
= mr
->dirty_log_mask
;
483 flatview_insert(view
, i
, &fr
);
487 /* Render a memory topology into a list of disjoint absolute ranges. */
488 static FlatView
generate_memory_topology(MemoryRegion
*mr
)
492 flatview_init(&view
);
494 render_memory_region(&view
, mr
, 0, addrrange_make(0, INT64_MAX
));
495 flatview_simplify(&view
);
500 static void address_space_add_del_ioeventfds(AddressSpace
*as
,
501 MemoryRegionIoeventfd
*fds_new
,
503 MemoryRegionIoeventfd
*fds_old
,
508 /* Generate a symmetric difference of the old and new fd sets, adding
509 * and deleting as necessary.
513 while (iold
< fds_old_nb
|| inew
< fds_new_nb
) {
514 if (iold
< fds_old_nb
515 && (inew
== fds_new_nb
516 || memory_region_ioeventfd_before(fds_old
[iold
],
518 as
->ops
->ioeventfd_del(as
, &fds_old
[iold
]);
520 } else if (inew
< fds_new_nb
521 && (iold
== fds_old_nb
522 || memory_region_ioeventfd_before(fds_new
[inew
],
524 as
->ops
->ioeventfd_add(as
, &fds_new
[inew
]);
533 static void address_space_update_ioeventfds(AddressSpace
*as
)
536 unsigned ioeventfd_nb
= 0;
537 MemoryRegionIoeventfd
*ioeventfds
= NULL
;
541 FOR_EACH_FLAT_RANGE(fr
, &as
->current_map
) {
542 for (i
= 0; i
< fr
->mr
->ioeventfd_nb
; ++i
) {
543 tmp
= addrrange_shift(fr
->mr
->ioeventfds
[i
].addr
,
544 fr
->addr
.start
- fr
->offset_in_region
);
545 if (addrrange_intersects(fr
->addr
, tmp
)) {
547 ioeventfds
= qemu_realloc(ioeventfds
,
548 ioeventfd_nb
* sizeof(*ioeventfds
));
549 ioeventfds
[ioeventfd_nb
-1] = fr
->mr
->ioeventfds
[i
];
550 ioeventfds
[ioeventfd_nb
-1].addr
= tmp
;
555 address_space_add_del_ioeventfds(as
, ioeventfds
, ioeventfd_nb
,
556 as
->ioeventfds
, as
->ioeventfd_nb
);
558 qemu_free(as
->ioeventfds
);
559 as
->ioeventfds
= ioeventfds
;
560 as
->ioeventfd_nb
= ioeventfd_nb
;
563 static void address_space_update_topology_pass(AddressSpace
*as
,
569 FlatRange
*frold
, *frnew
;
571 /* Generate a symmetric difference of the old and new memory maps.
572 * Kill ranges in the old map, and instantiate ranges in the new map.
575 while (iold
< old_view
.nr
|| inew
< new_view
.nr
) {
576 if (iold
< old_view
.nr
) {
577 frold
= &old_view
.ranges
[iold
];
581 if (inew
< new_view
.nr
) {
582 frnew
= &new_view
.ranges
[inew
];
589 || frold
->addr
.start
< frnew
->addr
.start
590 || (frold
->addr
.start
== frnew
->addr
.start
591 && !flatrange_equal(frold
, frnew
)))) {
592 /* In old, but (not in new, or in new but attributes changed). */
595 as
->ops
->range_del(as
, frold
);
599 } else if (frold
&& frnew
&& flatrange_equal(frold
, frnew
)) {
600 /* In both (logging may have changed) */
603 if (frold
->dirty_log_mask
&& !frnew
->dirty_log_mask
) {
604 as
->ops
->log_stop(as
, frnew
);
605 } else if (frnew
->dirty_log_mask
&& !frold
->dirty_log_mask
) {
606 as
->ops
->log_start(as
, frnew
);
616 as
->ops
->range_add(as
, frnew
);
625 static void address_space_update_topology(AddressSpace
*as
)
627 FlatView old_view
= as
->current_map
;
628 FlatView new_view
= generate_memory_topology(as
->root
);
630 address_space_update_topology_pass(as
, old_view
, new_view
, false);
631 address_space_update_topology_pass(as
, old_view
, new_view
, true);
633 as
->current_map
= new_view
;
634 flatview_destroy(&old_view
);
635 address_space_update_ioeventfds(as
);
638 static void memory_region_update_topology(void)
640 if (memory_region_transaction_depth
) {
644 if (address_space_memory
.root
) {
645 address_space_update_topology(&address_space_memory
);
647 if (address_space_io
.root
) {
648 address_space_update_topology(&address_space_io
);
652 void memory_region_transaction_begin(void)
654 ++memory_region_transaction_depth
;
657 void memory_region_transaction_commit(void)
659 assert(memory_region_transaction_depth
);
660 --memory_region_transaction_depth
;
661 memory_region_update_topology();
664 static void memory_region_destructor_none(MemoryRegion
*mr
)
668 static void memory_region_destructor_ram(MemoryRegion
*mr
)
670 qemu_ram_free(mr
->ram_addr
);
673 static void memory_region_destructor_ram_from_ptr(MemoryRegion
*mr
)
675 qemu_ram_free_from_ptr(mr
->ram_addr
);
678 static void memory_region_destructor_iomem(MemoryRegion
*mr
)
680 cpu_unregister_io_memory(mr
->ram_addr
);
683 void memory_region_init(MemoryRegion
*mr
,
692 mr
->terminates
= false;
693 mr
->destructor
= memory_region_destructor_none
;
695 mr
->may_overlap
= false;
697 QTAILQ_INIT(&mr
->subregions
);
698 memset(&mr
->subregions_link
, 0, sizeof mr
->subregions_link
);
699 QTAILQ_INIT(&mr
->coalesced
);
700 mr
->name
= qemu_strdup(name
);
701 mr
->dirty_log_mask
= 0;
702 mr
->ioeventfd_nb
= 0;
703 mr
->ioeventfds
= NULL
;
706 static bool memory_region_access_valid(MemoryRegion
*mr
,
707 target_phys_addr_t addr
,
710 if (!mr
->ops
->valid
.unaligned
&& (addr
& (size
- 1))) {
714 /* Treat zero as compatibility all valid */
715 if (!mr
->ops
->valid
.max_access_size
) {
719 if (size
> mr
->ops
->valid
.max_access_size
720 || size
< mr
->ops
->valid
.min_access_size
) {
726 static uint32_t memory_region_read_thunk_n(void *_mr
,
727 target_phys_addr_t addr
,
730 MemoryRegion
*mr
= _mr
;
731 unsigned access_size
, access_size_min
, access_size_max
;
732 uint64_t access_mask
;
733 uint32_t data
= 0, tmp
;
736 if (!memory_region_access_valid(mr
, addr
, size
)) {
737 return -1U; /* FIXME: better signalling */
740 if (!mr
->ops
->read
) {
741 return mr
->ops
->old_mmio
.read
[bitops_ffsl(size
)](mr
->opaque
, addr
);
744 /* FIXME: support unaligned access */
746 access_size_min
= mr
->ops
->impl
.min_access_size
;
747 if (!access_size_min
) {
750 access_size_max
= mr
->ops
->impl
.max_access_size
;
751 if (!access_size_max
) {
754 access_size
= MAX(MIN(size
, access_size_max
), access_size_min
);
755 access_mask
= -1ULL >> (64 - access_size
* 8);
757 for (i
= 0; i
< size
; i
+= access_size
) {
758 /* FIXME: big-endian support */
759 tmp
= mr
->ops
->read(mr
->opaque
, addr
+ i
, access_size
);
760 data
|= (tmp
& access_mask
) << (i
* 8);
766 static void memory_region_write_thunk_n(void *_mr
,
767 target_phys_addr_t addr
,
771 MemoryRegion
*mr
= _mr
;
772 unsigned access_size
, access_size_min
, access_size_max
;
773 uint64_t access_mask
;
776 if (!memory_region_access_valid(mr
, addr
, size
)) {
777 return; /* FIXME: better signalling */
780 if (!mr
->ops
->write
) {
781 mr
->ops
->old_mmio
.write
[bitops_ffsl(size
)](mr
->opaque
, addr
, data
);
785 /* FIXME: support unaligned access */
787 access_size_min
= mr
->ops
->impl
.min_access_size
;
788 if (!access_size_min
) {
791 access_size_max
= mr
->ops
->impl
.max_access_size
;
792 if (!access_size_max
) {
795 access_size
= MAX(MIN(size
, access_size_max
), access_size_min
);
796 access_mask
= -1ULL >> (64 - access_size
* 8);
798 for (i
= 0; i
< size
; i
+= access_size
) {
799 /* FIXME: big-endian support */
800 mr
->ops
->write(mr
->opaque
, addr
+ i
, (data
>> (i
* 8)) & access_mask
,
805 static uint32_t memory_region_read_thunk_b(void *mr
, target_phys_addr_t addr
)
807 return memory_region_read_thunk_n(mr
, addr
, 1);
810 static uint32_t memory_region_read_thunk_w(void *mr
, target_phys_addr_t addr
)
812 return memory_region_read_thunk_n(mr
, addr
, 2);
815 static uint32_t memory_region_read_thunk_l(void *mr
, target_phys_addr_t addr
)
817 return memory_region_read_thunk_n(mr
, addr
, 4);
820 static void memory_region_write_thunk_b(void *mr
, target_phys_addr_t addr
,
823 memory_region_write_thunk_n(mr
, addr
, 1, data
);
826 static void memory_region_write_thunk_w(void *mr
, target_phys_addr_t addr
,
829 memory_region_write_thunk_n(mr
, addr
, 2, data
);
832 static void memory_region_write_thunk_l(void *mr
, target_phys_addr_t addr
,
835 memory_region_write_thunk_n(mr
, addr
, 4, data
);
838 static CPUReadMemoryFunc
* const memory_region_read_thunk
[] = {
839 memory_region_read_thunk_b
,
840 memory_region_read_thunk_w
,
841 memory_region_read_thunk_l
,
844 static CPUWriteMemoryFunc
* const memory_region_write_thunk
[] = {
845 memory_region_write_thunk_b
,
846 memory_region_write_thunk_w
,
847 memory_region_write_thunk_l
,
850 static void memory_region_prepare_ram_addr(MemoryRegion
*mr
)
852 if (mr
->backend_registered
) {
856 mr
->destructor
= memory_region_destructor_iomem
;
857 mr
->ram_addr
= cpu_register_io_memory(memory_region_read_thunk
,
858 memory_region_write_thunk
,
860 mr
->ops
->endianness
);
861 mr
->backend_registered
= true;
864 void memory_region_init_io(MemoryRegion
*mr
,
865 const MemoryRegionOps
*ops
,
870 memory_region_init(mr
, name
, size
);
873 mr
->terminates
= true;
874 mr
->backend_registered
= false;
877 void memory_region_init_ram(MemoryRegion
*mr
,
882 memory_region_init(mr
, name
, size
);
883 mr
->terminates
= true;
884 mr
->destructor
= memory_region_destructor_ram
;
885 mr
->ram_addr
= qemu_ram_alloc(dev
, name
, size
);
886 mr
->backend_registered
= true;
889 void memory_region_init_ram_ptr(MemoryRegion
*mr
,
895 memory_region_init(mr
, name
, size
);
896 mr
->terminates
= true;
897 mr
->destructor
= memory_region_destructor_ram_from_ptr
;
898 mr
->ram_addr
= qemu_ram_alloc_from_ptr(dev
, name
, size
, ptr
);
899 mr
->backend_registered
= true;
902 void memory_region_init_alias(MemoryRegion
*mr
,
905 target_phys_addr_t offset
,
908 memory_region_init(mr
, name
, size
);
910 mr
->alias_offset
= offset
;
913 void memory_region_destroy(MemoryRegion
*mr
)
915 assert(QTAILQ_EMPTY(&mr
->subregions
));
917 memory_region_clear_coalescing(mr
);
918 qemu_free((char *)mr
->name
);
919 qemu_free(mr
->ioeventfds
);
922 uint64_t memory_region_size(MemoryRegion
*mr
)
927 void memory_region_set_offset(MemoryRegion
*mr
, target_phys_addr_t offset
)
932 void memory_region_set_log(MemoryRegion
*mr
, bool log
, unsigned client
)
934 uint8_t mask
= 1 << client
;
936 mr
->dirty_log_mask
= (mr
->dirty_log_mask
& ~mask
) | (log
* mask
);
937 memory_region_update_topology();
940 bool memory_region_get_dirty(MemoryRegion
*mr
, target_phys_addr_t addr
,
943 assert(mr
->terminates
);
944 return cpu_physical_memory_get_dirty(mr
->ram_addr
+ addr
, 1 << client
);
947 void memory_region_set_dirty(MemoryRegion
*mr
, target_phys_addr_t addr
)
949 assert(mr
->terminates
);
950 return cpu_physical_memory_set_dirty(mr
->ram_addr
+ addr
);
953 void memory_region_sync_dirty_bitmap(MemoryRegion
*mr
)
957 FOR_EACH_FLAT_RANGE(fr
, &address_space_memory
.current_map
) {
959 cpu_physical_sync_dirty_bitmap(fr
->addr
.start
,
960 fr
->addr
.start
+ fr
->addr
.size
);
965 void memory_region_set_readonly(MemoryRegion
*mr
, bool readonly
)
970 void memory_region_reset_dirty(MemoryRegion
*mr
, target_phys_addr_t addr
,
971 target_phys_addr_t size
, unsigned client
)
973 assert(mr
->terminates
);
974 cpu_physical_memory_reset_dirty(mr
->ram_addr
+ addr
,
975 mr
->ram_addr
+ addr
+ size
,
979 void *memory_region_get_ram_ptr(MemoryRegion
*mr
)
982 return memory_region_get_ram_ptr(mr
->alias
) + mr
->alias_offset
;
985 assert(mr
->terminates
);
987 return qemu_get_ram_ptr(mr
->ram_addr
);
990 static void memory_region_update_coalesced_range(MemoryRegion
*mr
)
993 CoalescedMemoryRange
*cmr
;
996 FOR_EACH_FLAT_RANGE(fr
, &address_space_memory
.current_map
) {
998 qemu_unregister_coalesced_mmio(fr
->addr
.start
, fr
->addr
.size
);
999 QTAILQ_FOREACH(cmr
, &mr
->coalesced
, link
) {
1000 tmp
= addrrange_shift(cmr
->addr
,
1001 fr
->addr
.start
- fr
->offset_in_region
);
1002 if (!addrrange_intersects(tmp
, fr
->addr
)) {
1005 tmp
= addrrange_intersection(tmp
, fr
->addr
);
1006 qemu_register_coalesced_mmio(tmp
.start
, tmp
.size
);
1012 void memory_region_set_coalescing(MemoryRegion
*mr
)
1014 memory_region_clear_coalescing(mr
);
1015 memory_region_add_coalescing(mr
, 0, mr
->size
);
1018 void memory_region_add_coalescing(MemoryRegion
*mr
,
1019 target_phys_addr_t offset
,
1022 CoalescedMemoryRange
*cmr
= qemu_malloc(sizeof(*cmr
));
1024 cmr
->addr
= addrrange_make(offset
, size
);
1025 QTAILQ_INSERT_TAIL(&mr
->coalesced
, cmr
, link
);
1026 memory_region_update_coalesced_range(mr
);
1029 void memory_region_clear_coalescing(MemoryRegion
*mr
)
1031 CoalescedMemoryRange
*cmr
;
1033 while (!QTAILQ_EMPTY(&mr
->coalesced
)) {
1034 cmr
= QTAILQ_FIRST(&mr
->coalesced
);
1035 QTAILQ_REMOVE(&mr
->coalesced
, cmr
, link
);
1038 memory_region_update_coalesced_range(mr
);
1041 void memory_region_add_eventfd(MemoryRegion
*mr
,
1042 target_phys_addr_t addr
,
1048 MemoryRegionIoeventfd mrfd
= {
1051 .match_data
= match_data
,
1057 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
1058 if (memory_region_ioeventfd_before(mrfd
, mr
->ioeventfds
[i
])) {
1063 mr
->ioeventfds
= qemu_realloc(mr
->ioeventfds
,
1064 sizeof(*mr
->ioeventfds
) * mr
->ioeventfd_nb
);
1065 memmove(&mr
->ioeventfds
[i
+1], &mr
->ioeventfds
[i
],
1066 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
-1 - i
));
1067 mr
->ioeventfds
[i
] = mrfd
;
1068 memory_region_update_topology();
1071 void memory_region_del_eventfd(MemoryRegion
*mr
,
1072 target_phys_addr_t addr
,
1078 MemoryRegionIoeventfd mrfd
= {
1081 .match_data
= match_data
,
1087 for (i
= 0; i
< mr
->ioeventfd_nb
; ++i
) {
1088 if (memory_region_ioeventfd_equal(mrfd
, mr
->ioeventfds
[i
])) {
1092 assert(i
!= mr
->ioeventfd_nb
);
1093 memmove(&mr
->ioeventfds
[i
], &mr
->ioeventfds
[i
+1],
1094 sizeof(*mr
->ioeventfds
) * (mr
->ioeventfd_nb
- (i
+1)));
1096 mr
->ioeventfds
= qemu_realloc(mr
->ioeventfds
,
1097 sizeof(*mr
->ioeventfds
)*mr
->ioeventfd_nb
+ 1);
1098 memory_region_update_topology();
1101 static void memory_region_add_subregion_common(MemoryRegion
*mr
,
1102 target_phys_addr_t offset
,
1103 MemoryRegion
*subregion
)
1105 MemoryRegion
*other
;
1107 assert(!subregion
->parent
);
1108 subregion
->parent
= mr
;
1109 subregion
->addr
= offset
;
1110 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
1111 if (subregion
->may_overlap
|| other
->may_overlap
) {
1114 if (offset
>= other
->offset
+ other
->size
1115 || offset
+ subregion
->size
<= other
->offset
) {
1118 printf("warning: subregion collision %llx/%llx vs %llx/%llx\n",
1119 (unsigned long long)offset
,
1120 (unsigned long long)subregion
->size
,
1121 (unsigned long long)other
->offset
,
1122 (unsigned long long)other
->size
);
1124 QTAILQ_FOREACH(other
, &mr
->subregions
, subregions_link
) {
1125 if (subregion
->priority
>= other
->priority
) {
1126 QTAILQ_INSERT_BEFORE(other
, subregion
, subregions_link
);
1130 QTAILQ_INSERT_TAIL(&mr
->subregions
, subregion
, subregions_link
);
1132 memory_region_update_topology();
1136 void memory_region_add_subregion(MemoryRegion
*mr
,
1137 target_phys_addr_t offset
,
1138 MemoryRegion
*subregion
)
1140 subregion
->may_overlap
= false;
1141 subregion
->priority
= 0;
1142 memory_region_add_subregion_common(mr
, offset
, subregion
);
1145 void memory_region_add_subregion_overlap(MemoryRegion
*mr
,
1146 target_phys_addr_t offset
,
1147 MemoryRegion
*subregion
,
1150 subregion
->may_overlap
= true;
1151 subregion
->priority
= priority
;
1152 memory_region_add_subregion_common(mr
, offset
, subregion
);
1155 void memory_region_del_subregion(MemoryRegion
*mr
,
1156 MemoryRegion
*subregion
)
1158 assert(subregion
->parent
== mr
);
1159 subregion
->parent
= NULL
;
1160 QTAILQ_REMOVE(&mr
->subregions
, subregion
, subregions_link
);
1161 memory_region_update_topology();
1164 void set_system_memory_map(MemoryRegion
*mr
)
1166 address_space_memory
.root
= mr
;
1167 memory_region_update_topology();
1170 void set_system_io_map(MemoryRegion
*mr
)
1172 address_space_io
.root
= mr
;
1173 memory_region_update_topology();