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093bc2cd AK |
1 | /* |
2 | * Physical memory management API | |
3 | * | |
4 | * Copyright 2011 Red Hat, Inc. and/or its affiliates | |
5 | * | |
6 | * Authors: | |
7 | * Avi Kivity <avi@redhat.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
14 | #ifndef MEMORY_H | |
15 | #define MEMORY_H | |
16 | ||
17 | #ifndef CONFIG_USER_ONLY | |
18 | ||
1ab4c8ce JQ |
19 | #define DIRTY_MEMORY_VGA 0 |
20 | #define DIRTY_MEMORY_CODE 1 | |
21 | #define DIRTY_MEMORY_MIGRATION 2 | |
22 | #define DIRTY_MEMORY_NUM 3 /* num of dirty bits */ | |
23 | ||
022c62cb | 24 | #include "exec/cpu-common.h" |
ce927ed9 | 25 | #ifndef CONFIG_USER_ONLY |
022c62cb | 26 | #include "exec/hwaddr.h" |
ce927ed9 | 27 | #endif |
cc05c43a | 28 | #include "exec/memattrs.h" |
1de7afc9 | 29 | #include "qemu/queue.h" |
1de7afc9 | 30 | #include "qemu/int128.h" |
06866575 | 31 | #include "qemu/notify.h" |
b4fefef9 | 32 | #include "qom/object.h" |
374f2981 | 33 | #include "qemu/rcu.h" |
093bc2cd | 34 | |
07bdaa41 PB |
35 | #define RAM_ADDR_INVALID (~(ram_addr_t)0) |
36 | ||
052e87b0 PB |
37 | #define MAX_PHYS_ADDR_SPACE_BITS 62 |
38 | #define MAX_PHYS_ADDR (((hwaddr)1 << MAX_PHYS_ADDR_SPACE_BITS) - 1) | |
39 | ||
b4fefef9 PC |
40 | #define TYPE_MEMORY_REGION "qemu:memory-region" |
41 | #define MEMORY_REGION(obj) \ | |
42 | OBJECT_CHECK(MemoryRegion, (obj), TYPE_MEMORY_REGION) | |
43 | ||
093bc2cd | 44 | typedef struct MemoryRegionOps MemoryRegionOps; |
74901c3b | 45 | typedef struct MemoryRegionMmio MemoryRegionMmio; |
093bc2cd | 46 | |
74901c3b AK |
47 | struct MemoryRegionMmio { |
48 | CPUReadMemoryFunc *read[3]; | |
49 | CPUWriteMemoryFunc *write[3]; | |
50 | }; | |
51 | ||
30951157 AK |
52 | typedef struct IOMMUTLBEntry IOMMUTLBEntry; |
53 | ||
54 | /* See address_space_translate: bit 0 is read, bit 1 is write. */ | |
55 | typedef enum { | |
56 | IOMMU_NONE = 0, | |
57 | IOMMU_RO = 1, | |
58 | IOMMU_WO = 2, | |
59 | IOMMU_RW = 3, | |
60 | } IOMMUAccessFlags; | |
61 | ||
62 | struct IOMMUTLBEntry { | |
63 | AddressSpace *target_as; | |
64 | hwaddr iova; | |
65 | hwaddr translated_addr; | |
66 | hwaddr addr_mask; /* 0xfff = 4k translation */ | |
67 | IOMMUAccessFlags perm; | |
68 | }; | |
69 | ||
cc05c43a PM |
70 | /* New-style MMIO accessors can indicate that the transaction failed. |
71 | * A zero (MEMTX_OK) response means success; anything else is a failure | |
72 | * of some kind. The memory subsystem will bitwise-OR together results | |
73 | * if it is synthesizing an operation from multiple smaller accesses. | |
74 | */ | |
75 | #define MEMTX_OK 0 | |
76 | #define MEMTX_ERROR (1U << 0) /* device returned an error */ | |
77 | #define MEMTX_DECODE_ERROR (1U << 1) /* nothing at that address */ | |
78 | typedef uint32_t MemTxResult; | |
79 | ||
093bc2cd AK |
80 | /* |
81 | * Memory region callbacks | |
82 | */ | |
83 | struct MemoryRegionOps { | |
84 | /* Read from the memory region. @addr is relative to @mr; @size is | |
85 | * in bytes. */ | |
86 | uint64_t (*read)(void *opaque, | |
a8170e5e | 87 | hwaddr addr, |
093bc2cd AK |
88 | unsigned size); |
89 | /* Write to the memory region. @addr is relative to @mr; @size is | |
90 | * in bytes. */ | |
91 | void (*write)(void *opaque, | |
a8170e5e | 92 | hwaddr addr, |
093bc2cd AK |
93 | uint64_t data, |
94 | unsigned size); | |
95 | ||
cc05c43a PM |
96 | MemTxResult (*read_with_attrs)(void *opaque, |
97 | hwaddr addr, | |
98 | uint64_t *data, | |
99 | unsigned size, | |
100 | MemTxAttrs attrs); | |
101 | MemTxResult (*write_with_attrs)(void *opaque, | |
102 | hwaddr addr, | |
103 | uint64_t data, | |
104 | unsigned size, | |
105 | MemTxAttrs attrs); | |
106 | ||
093bc2cd AK |
107 | enum device_endian endianness; |
108 | /* Guest-visible constraints: */ | |
109 | struct { | |
110 | /* If nonzero, specify bounds on access sizes beyond which a machine | |
111 | * check is thrown. | |
112 | */ | |
113 | unsigned min_access_size; | |
114 | unsigned max_access_size; | |
115 | /* If true, unaligned accesses are supported. Otherwise unaligned | |
116 | * accesses throw machine checks. | |
117 | */ | |
118 | bool unaligned; | |
897fa7cf AK |
119 | /* |
120 | * If present, and returns #false, the transaction is not accepted | |
121 | * by the device (and results in machine dependent behaviour such | |
122 | * as a machine check exception). | |
123 | */ | |
a8170e5e | 124 | bool (*accepts)(void *opaque, hwaddr addr, |
897fa7cf | 125 | unsigned size, bool is_write); |
093bc2cd AK |
126 | } valid; |
127 | /* Internal implementation constraints: */ | |
128 | struct { | |
129 | /* If nonzero, specifies the minimum size implemented. Smaller sizes | |
130 | * will be rounded upwards and a partial result will be returned. | |
131 | */ | |
132 | unsigned min_access_size; | |
133 | /* If nonzero, specifies the maximum size implemented. Larger sizes | |
134 | * will be done as a series of accesses with smaller sizes. | |
135 | */ | |
136 | unsigned max_access_size; | |
137 | /* If true, unaligned accesses are supported. Otherwise all accesses | |
138 | * are converted to (possibly multiple) naturally aligned accesses. | |
139 | */ | |
edc1ba7a | 140 | bool unaligned; |
093bc2cd | 141 | } impl; |
627a0e90 | 142 | |
74901c3b AK |
143 | /* If .read and .write are not present, old_mmio may be used for |
144 | * backwards compatibility with old mmio registration | |
145 | */ | |
146 | const MemoryRegionMmio old_mmio; | |
093bc2cd AK |
147 | }; |
148 | ||
30951157 AK |
149 | typedef struct MemoryRegionIOMMUOps MemoryRegionIOMMUOps; |
150 | ||
151 | struct MemoryRegionIOMMUOps { | |
152 | /* Return a TLB entry that contains a given address. */ | |
8d7b8cb9 | 153 | IOMMUTLBEntry (*translate)(MemoryRegion *iommu, hwaddr addr, bool is_write); |
f682e9c2 AK |
154 | /* Returns minimum supported page size */ |
155 | uint64_t (*get_min_page_size)(MemoryRegion *iommu); | |
d22d8956 AK |
156 | /* Called when the first notifier is set */ |
157 | void (*notify_started)(MemoryRegion *iommu); | |
158 | /* Called when the last notifier is removed */ | |
159 | void (*notify_stopped)(MemoryRegion *iommu); | |
30951157 AK |
160 | }; |
161 | ||
093bc2cd | 162 | typedef struct CoalescedMemoryRange CoalescedMemoryRange; |
3e9d69e7 | 163 | typedef struct MemoryRegionIoeventfd MemoryRegionIoeventfd; |
093bc2cd AK |
164 | |
165 | struct MemoryRegion { | |
b4fefef9 | 166 | Object parent_obj; |
a676854f | 167 | |
093bc2cd | 168 | /* All fields are private - violators will be prosecuted */ |
a676854f PB |
169 | |
170 | /* The following fields should fit in a cache line */ | |
171 | bool romd_mode; | |
172 | bool ram; | |
173 | bool subpage; | |
174 | bool readonly; /* For RAM regions */ | |
175 | bool rom_device; | |
176 | bool flush_coalesced_mmio; | |
177 | bool global_locking; | |
178 | uint8_t dirty_log_mask; | |
58eaa217 | 179 | RAMBlock *ram_block; |
612263cf | 180 | Object *owner; |
30951157 | 181 | const MemoryRegionIOMMUOps *iommu_ops; |
a676854f PB |
182 | |
183 | const MemoryRegionOps *ops; | |
093bc2cd | 184 | void *opaque; |
feca4ac1 | 185 | MemoryRegion *container; |
08dafab4 | 186 | Int128 size; |
a8170e5e | 187 | hwaddr addr; |
545e92e0 | 188 | void (*destructor)(MemoryRegion *mr); |
a2b257d6 | 189 | uint64_t align; |
14a3c10a | 190 | bool terminates; |
e4dc3f59 | 191 | bool skip_dump; |
6bba19ba | 192 | bool enabled; |
1660e72d | 193 | bool warning_printed; /* For reservations */ |
deb809ed | 194 | uint8_t vga_logging_count; |
093bc2cd | 195 | MemoryRegion *alias; |
a8170e5e | 196 | hwaddr alias_offset; |
d33382da | 197 | int32_t priority; |
093bc2cd AK |
198 | QTAILQ_HEAD(subregions, MemoryRegion) subregions; |
199 | QTAILQ_ENTRY(MemoryRegion) subregions_link; | |
200 | QTAILQ_HEAD(coalesced_ranges, CoalescedMemoryRange) coalesced; | |
302fa283 | 201 | const char *name; |
3e9d69e7 AK |
202 | unsigned ioeventfd_nb; |
203 | MemoryRegionIoeventfd *ioeventfds; | |
06866575 | 204 | NotifierList iommu_notify; |
093bc2cd AK |
205 | }; |
206 | ||
c2fc83e8 PB |
207 | /** |
208 | * MemoryListener: callbacks structure for updates to the physical memory map | |
209 | * | |
210 | * Allows a component to adjust to changes in the guest-visible memory map. | |
211 | * Use with memory_listener_register() and memory_listener_unregister(). | |
212 | */ | |
213 | struct MemoryListener { | |
214 | void (*begin)(MemoryListener *listener); | |
215 | void (*commit)(MemoryListener *listener); | |
216 | void (*region_add)(MemoryListener *listener, MemoryRegionSection *section); | |
217 | void (*region_del)(MemoryListener *listener, MemoryRegionSection *section); | |
218 | void (*region_nop)(MemoryListener *listener, MemoryRegionSection *section); | |
b2dfd71c PB |
219 | void (*log_start)(MemoryListener *listener, MemoryRegionSection *section, |
220 | int old, int new); | |
221 | void (*log_stop)(MemoryListener *listener, MemoryRegionSection *section, | |
222 | int old, int new); | |
c2fc83e8 PB |
223 | void (*log_sync)(MemoryListener *listener, MemoryRegionSection *section); |
224 | void (*log_global_start)(MemoryListener *listener); | |
225 | void (*log_global_stop)(MemoryListener *listener); | |
226 | void (*eventfd_add)(MemoryListener *listener, MemoryRegionSection *section, | |
227 | bool match_data, uint64_t data, EventNotifier *e); | |
228 | void (*eventfd_del)(MemoryListener *listener, MemoryRegionSection *section, | |
229 | bool match_data, uint64_t data, EventNotifier *e); | |
230 | void (*coalesced_mmio_add)(MemoryListener *listener, MemoryRegionSection *section, | |
231 | hwaddr addr, hwaddr len); | |
232 | void (*coalesced_mmio_del)(MemoryListener *listener, MemoryRegionSection *section, | |
233 | hwaddr addr, hwaddr len); | |
234 | /* Lower = earlier (during add), later (during del) */ | |
235 | unsigned priority; | |
236 | AddressSpace *address_space_filter; | |
237 | QTAILQ_ENTRY(MemoryListener) link; | |
238 | }; | |
239 | ||
9ad2bbc1 AK |
240 | /** |
241 | * AddressSpace: describes a mapping of addresses to #MemoryRegion objects | |
242 | */ | |
243 | struct AddressSpace { | |
244 | /* All fields are private. */ | |
374f2981 | 245 | struct rcu_head rcu; |
7dca8043 | 246 | char *name; |
9ad2bbc1 | 247 | MemoryRegion *root; |
f0c02d15 PC |
248 | int ref_count; |
249 | bool malloced; | |
374f2981 PB |
250 | |
251 | /* Accessed via RCU. */ | |
9ad2bbc1 | 252 | struct FlatView *current_map; |
374f2981 | 253 | |
9ad2bbc1 AK |
254 | int ioeventfd_nb; |
255 | struct MemoryRegionIoeventfd *ioeventfds; | |
ac1970fb | 256 | struct AddressSpaceDispatch *dispatch; |
00752703 | 257 | struct AddressSpaceDispatch *next_dispatch; |
89ae337a PB |
258 | MemoryListener dispatch_listener; |
259 | ||
0d673e36 | 260 | QTAILQ_ENTRY(AddressSpace) address_spaces_link; |
9ad2bbc1 AK |
261 | }; |
262 | ||
e2177955 AK |
263 | /** |
264 | * MemoryRegionSection: describes a fragment of a #MemoryRegion | |
265 | * | |
266 | * @mr: the region, or %NULL if empty | |
7664e80c | 267 | * @address_space: the address space the region is mapped in |
e2177955 AK |
268 | * @offset_within_region: the beginning of the section, relative to @mr's start |
269 | * @size: the size of the section; will not exceed @mr's boundaries | |
270 | * @offset_within_address_space: the address of the first byte of the section | |
271 | * relative to the region's address space | |
7a8499e8 | 272 | * @readonly: writes to this section are ignored |
e2177955 AK |
273 | */ |
274 | struct MemoryRegionSection { | |
275 | MemoryRegion *mr; | |
f6790af6 | 276 | AddressSpace *address_space; |
a8170e5e | 277 | hwaddr offset_within_region; |
052e87b0 | 278 | Int128 size; |
a8170e5e | 279 | hwaddr offset_within_address_space; |
7a8499e8 | 280 | bool readonly; |
e2177955 AK |
281 | }; |
282 | ||
093bc2cd AK |
283 | /** |
284 | * memory_region_init: Initialize a memory region | |
285 | * | |
69ddaf66 | 286 | * The region typically acts as a container for other memory regions. Use |
093bc2cd AK |
287 | * memory_region_add_subregion() to add subregions. |
288 | * | |
289 | * @mr: the #MemoryRegion to be initialized | |
2c9b15ca | 290 | * @owner: the object that tracks the region's reference count |
093bc2cd AK |
291 | * @name: used for debugging; not visible to the user or ABI |
292 | * @size: size of the region; any subregions beyond this size will be clipped | |
293 | */ | |
294 | void memory_region_init(MemoryRegion *mr, | |
2c9b15ca | 295 | struct Object *owner, |
093bc2cd AK |
296 | const char *name, |
297 | uint64_t size); | |
46637be2 PB |
298 | |
299 | /** | |
300 | * memory_region_ref: Add 1 to a memory region's reference count | |
301 | * | |
302 | * Whenever memory regions are accessed outside the BQL, they need to be | |
303 | * preserved against hot-unplug. MemoryRegions actually do not have their | |
304 | * own reference count; they piggyback on a QOM object, their "owner". | |
305 | * This function adds a reference to the owner. | |
306 | * | |
307 | * All MemoryRegions must have an owner if they can disappear, even if the | |
308 | * device they belong to operates exclusively under the BQL. This is because | |
309 | * the region could be returned at any time by memory_region_find, and this | |
310 | * is usually under guest control. | |
311 | * | |
312 | * @mr: the #MemoryRegion | |
313 | */ | |
314 | void memory_region_ref(MemoryRegion *mr); | |
315 | ||
316 | /** | |
317 | * memory_region_unref: Remove 1 to a memory region's reference count | |
318 | * | |
319 | * Whenever memory regions are accessed outside the BQL, they need to be | |
320 | * preserved against hot-unplug. MemoryRegions actually do not have their | |
321 | * own reference count; they piggyback on a QOM object, their "owner". | |
322 | * This function removes a reference to the owner and possibly destroys it. | |
323 | * | |
324 | * @mr: the #MemoryRegion | |
325 | */ | |
326 | void memory_region_unref(MemoryRegion *mr); | |
327 | ||
093bc2cd AK |
328 | /** |
329 | * memory_region_init_io: Initialize an I/O memory region. | |
330 | * | |
69ddaf66 | 331 | * Accesses into the region will cause the callbacks in @ops to be called. |
093bc2cd AK |
332 | * if @size is nonzero, subregions will be clipped to @size. |
333 | * | |
334 | * @mr: the #MemoryRegion to be initialized. | |
2c9b15ca | 335 | * @owner: the object that tracks the region's reference count |
093bc2cd AK |
336 | * @ops: a structure containing read and write callbacks to be used when |
337 | * I/O is performed on the region. | |
b6af0975 | 338 | * @opaque: passed to the read and write callbacks of the @ops structure. |
093bc2cd AK |
339 | * @name: used for debugging; not visible to the user or ABI |
340 | * @size: size of the region. | |
341 | */ | |
342 | void memory_region_init_io(MemoryRegion *mr, | |
2c9b15ca | 343 | struct Object *owner, |
093bc2cd AK |
344 | const MemoryRegionOps *ops, |
345 | void *opaque, | |
346 | const char *name, | |
347 | uint64_t size); | |
348 | ||
349 | /** | |
350 | * memory_region_init_ram: Initialize RAM memory region. Accesses into the | |
69ddaf66 | 351 | * region will modify memory directly. |
093bc2cd AK |
352 | * |
353 | * @mr: the #MemoryRegion to be initialized. | |
2c9b15ca | 354 | * @owner: the object that tracks the region's reference count |
c5705a77 | 355 | * @name: the name of the region. |
093bc2cd | 356 | * @size: size of the region. |
49946538 | 357 | * @errp: pointer to Error*, to store an error if it happens. |
093bc2cd AK |
358 | */ |
359 | void memory_region_init_ram(MemoryRegion *mr, | |
2c9b15ca | 360 | struct Object *owner, |
093bc2cd | 361 | const char *name, |
49946538 HT |
362 | uint64_t size, |
363 | Error **errp); | |
093bc2cd | 364 | |
60786ef3 MT |
365 | /** |
366 | * memory_region_init_resizeable_ram: Initialize memory region with resizeable | |
367 | * RAM. Accesses into the region will | |
368 | * modify memory directly. Only an initial | |
369 | * portion of this RAM is actually used. | |
370 | * The used size can change across reboots. | |
371 | * | |
372 | * @mr: the #MemoryRegion to be initialized. | |
373 | * @owner: the object that tracks the region's reference count | |
374 | * @name: the name of the region. | |
375 | * @size: used size of the region. | |
376 | * @max_size: max size of the region. | |
377 | * @resized: callback to notify owner about used size change. | |
378 | * @errp: pointer to Error*, to store an error if it happens. | |
379 | */ | |
380 | void memory_region_init_resizeable_ram(MemoryRegion *mr, | |
381 | struct Object *owner, | |
382 | const char *name, | |
383 | uint64_t size, | |
384 | uint64_t max_size, | |
385 | void (*resized)(const char*, | |
386 | uint64_t length, | |
387 | void *host), | |
388 | Error **errp); | |
0b183fc8 PB |
389 | #ifdef __linux__ |
390 | /** | |
391 | * memory_region_init_ram_from_file: Initialize RAM memory region with a | |
392 | * mmap-ed backend. | |
393 | * | |
394 | * @mr: the #MemoryRegion to be initialized. | |
395 | * @owner: the object that tracks the region's reference count | |
396 | * @name: the name of the region. | |
397 | * @size: size of the region. | |
dbcb8981 | 398 | * @share: %true if memory must be mmaped with the MAP_SHARED flag |
0b183fc8 | 399 | * @path: the path in which to allocate the RAM. |
7f56e740 | 400 | * @errp: pointer to Error*, to store an error if it happens. |
0b183fc8 PB |
401 | */ |
402 | void memory_region_init_ram_from_file(MemoryRegion *mr, | |
403 | struct Object *owner, | |
404 | const char *name, | |
405 | uint64_t size, | |
dbcb8981 | 406 | bool share, |
7f56e740 PB |
407 | const char *path, |
408 | Error **errp); | |
0b183fc8 PB |
409 | #endif |
410 | ||
093bc2cd | 411 | /** |
1a7e8cae BZ |
412 | * memory_region_init_ram_ptr: Initialize RAM memory region from a |
413 | * user-provided pointer. Accesses into the | |
414 | * region will modify memory directly. | |
093bc2cd AK |
415 | * |
416 | * @mr: the #MemoryRegion to be initialized. | |
2c9b15ca | 417 | * @owner: the object that tracks the region's reference count |
c5705a77 | 418 | * @name: the name of the region. |
093bc2cd AK |
419 | * @size: size of the region. |
420 | * @ptr: memory to be mapped; must contain at least @size bytes. | |
421 | */ | |
422 | void memory_region_init_ram_ptr(MemoryRegion *mr, | |
2c9b15ca | 423 | struct Object *owner, |
093bc2cd AK |
424 | const char *name, |
425 | uint64_t size, | |
426 | void *ptr); | |
427 | ||
428 | /** | |
429 | * memory_region_init_alias: Initialize a memory region that aliases all or a | |
430 | * part of another memory region. | |
431 | * | |
432 | * @mr: the #MemoryRegion to be initialized. | |
2c9b15ca | 433 | * @owner: the object that tracks the region's reference count |
093bc2cd AK |
434 | * @name: used for debugging; not visible to the user or ABI |
435 | * @orig: the region to be referenced; @mr will be equivalent to | |
436 | * @orig between @offset and @offset + @size - 1. | |
437 | * @offset: start of the section in @orig to be referenced. | |
438 | * @size: size of the region. | |
439 | */ | |
440 | void memory_region_init_alias(MemoryRegion *mr, | |
2c9b15ca | 441 | struct Object *owner, |
093bc2cd AK |
442 | const char *name, |
443 | MemoryRegion *orig, | |
a8170e5e | 444 | hwaddr offset, |
093bc2cd | 445 | uint64_t size); |
d0a9b5bc | 446 | |
a1777f7f PM |
447 | /** |
448 | * memory_region_init_rom: Initialize a ROM memory region. | |
449 | * | |
450 | * This has the same effect as calling memory_region_init_ram() | |
451 | * and then marking the resulting region read-only with | |
452 | * memory_region_set_readonly(). | |
453 | * | |
454 | * @mr: the #MemoryRegion to be initialized. | |
455 | * @owner: the object that tracks the region's reference count | |
456 | * @name: the name of the region. | |
457 | * @size: size of the region. | |
458 | * @errp: pointer to Error*, to store an error if it happens. | |
459 | */ | |
460 | void memory_region_init_rom(MemoryRegion *mr, | |
461 | struct Object *owner, | |
462 | const char *name, | |
463 | uint64_t size, | |
464 | Error **errp); | |
465 | ||
d0a9b5bc AK |
466 | /** |
467 | * memory_region_init_rom_device: Initialize a ROM memory region. Writes are | |
468 | * handled via callbacks. | |
469 | * | |
6d6d2abf PF |
470 | * If NULL callbacks pointer is given, then I/O space is not supposed to be |
471 | * handled by QEMU itself. Any access via the memory API will cause an abort(). | |
472 | * | |
d0a9b5bc | 473 | * @mr: the #MemoryRegion to be initialized. |
2c9b15ca | 474 | * @owner: the object that tracks the region's reference count |
d0a9b5bc | 475 | * @ops: callbacks for write access handling. |
c5705a77 | 476 | * @name: the name of the region. |
d0a9b5bc | 477 | * @size: size of the region. |
33e0eb52 | 478 | * @errp: pointer to Error*, to store an error if it happens. |
d0a9b5bc AK |
479 | */ |
480 | void memory_region_init_rom_device(MemoryRegion *mr, | |
2c9b15ca | 481 | struct Object *owner, |
d0a9b5bc | 482 | const MemoryRegionOps *ops, |
75f5941c | 483 | void *opaque, |
d0a9b5bc | 484 | const char *name, |
33e0eb52 HT |
485 | uint64_t size, |
486 | Error **errp); | |
d0a9b5bc | 487 | |
1660e72d JK |
488 | /** |
489 | * memory_region_init_reservation: Initialize a memory region that reserves | |
490 | * I/O space. | |
491 | * | |
492 | * A reservation region primariy serves debugging purposes. It claims I/O | |
493 | * space that is not supposed to be handled by QEMU itself. Any access via | |
494 | * the memory API will cause an abort(). | |
6d6d2abf PF |
495 | * This function is deprecated. Use memory_region_init_io() with NULL |
496 | * callbacks instead. | |
1660e72d JK |
497 | * |
498 | * @mr: the #MemoryRegion to be initialized | |
2c9b15ca | 499 | * @owner: the object that tracks the region's reference count |
1660e72d JK |
500 | * @name: used for debugging; not visible to the user or ABI |
501 | * @size: size of the region. | |
502 | */ | |
6d6d2abf PF |
503 | static inline void memory_region_init_reservation(MemoryRegion *mr, |
504 | Object *owner, | |
1660e72d | 505 | const char *name, |
6d6d2abf PF |
506 | uint64_t size) |
507 | { | |
508 | memory_region_init_io(mr, owner, NULL, mr, name, size); | |
509 | } | |
30951157 AK |
510 | |
511 | /** | |
512 | * memory_region_init_iommu: Initialize a memory region that translates | |
513 | * addresses | |
514 | * | |
515 | * An IOMMU region translates addresses and forwards accesses to a target | |
516 | * memory region. | |
517 | * | |
518 | * @mr: the #MemoryRegion to be initialized | |
2c9b15ca | 519 | * @owner: the object that tracks the region's reference count |
30951157 AK |
520 | * @ops: a function that translates addresses into the @target region |
521 | * @name: used for debugging; not visible to the user or ABI | |
522 | * @size: size of the region. | |
523 | */ | |
524 | void memory_region_init_iommu(MemoryRegion *mr, | |
2c9b15ca | 525 | struct Object *owner, |
30951157 AK |
526 | const MemoryRegionIOMMUOps *ops, |
527 | const char *name, | |
528 | uint64_t size); | |
529 | ||
803c0816 PB |
530 | /** |
531 | * memory_region_owner: get a memory region's owner. | |
532 | * | |
533 | * @mr: the memory region being queried. | |
534 | */ | |
535 | struct Object *memory_region_owner(MemoryRegion *mr); | |
536 | ||
093bc2cd AK |
537 | /** |
538 | * memory_region_size: get a memory region's size. | |
539 | * | |
540 | * @mr: the memory region being queried. | |
541 | */ | |
542 | uint64_t memory_region_size(MemoryRegion *mr); | |
543 | ||
8ea9252a AK |
544 | /** |
545 | * memory_region_is_ram: check whether a memory region is random access | |
546 | * | |
547 | * Returns %true is a memory region is random access. | |
548 | * | |
549 | * @mr: the memory region being queried | |
550 | */ | |
1619d1fe PB |
551 | static inline bool memory_region_is_ram(MemoryRegion *mr) |
552 | { | |
553 | return mr->ram; | |
554 | } | |
8ea9252a | 555 | |
e4dc3f59 ND |
556 | /** |
557 | * memory_region_is_skip_dump: check whether a memory region should not be | |
558 | * dumped | |
559 | * | |
560 | * Returns %true is a memory region should not be dumped(e.g. VFIO BAR MMAP). | |
561 | * | |
562 | * @mr: the memory region being queried | |
563 | */ | |
564 | bool memory_region_is_skip_dump(MemoryRegion *mr); | |
565 | ||
566 | /** | |
567 | * memory_region_set_skip_dump: Set skip_dump flag, dump will ignore this memory | |
568 | * region | |
569 | * | |
570 | * @mr: the memory region being queried | |
571 | */ | |
572 | void memory_region_set_skip_dump(MemoryRegion *mr); | |
573 | ||
fd062573 | 574 | /** |
5f9a5ea1 | 575 | * memory_region_is_romd: check whether a memory region is in ROMD mode |
fd062573 | 576 | * |
5f9a5ea1 | 577 | * Returns %true if a memory region is a ROM device and currently set to allow |
fd062573 BS |
578 | * direct reads. |
579 | * | |
580 | * @mr: the memory region being queried | |
581 | */ | |
582 | static inline bool memory_region_is_romd(MemoryRegion *mr) | |
583 | { | |
5f9a5ea1 | 584 | return mr->rom_device && mr->romd_mode; |
fd062573 BS |
585 | } |
586 | ||
30951157 AK |
587 | /** |
588 | * memory_region_is_iommu: check whether a memory region is an iommu | |
589 | * | |
590 | * Returns %true is a memory region is an iommu. | |
591 | * | |
592 | * @mr: the memory region being queried | |
593 | */ | |
1619d1fe PB |
594 | static inline bool memory_region_is_iommu(MemoryRegion *mr) |
595 | { | |
596 | return mr->iommu_ops; | |
597 | } | |
598 | ||
30951157 | 599 | |
f682e9c2 AK |
600 | /** |
601 | * memory_region_iommu_get_min_page_size: get minimum supported page size | |
602 | * for an iommu | |
603 | * | |
604 | * Returns minimum supported page size for an iommu. | |
605 | * | |
606 | * @mr: the memory region being queried | |
607 | */ | |
608 | uint64_t memory_region_iommu_get_min_page_size(MemoryRegion *mr); | |
609 | ||
06866575 DG |
610 | /** |
611 | * memory_region_notify_iommu: notify a change in an IOMMU translation entry. | |
612 | * | |
613 | * @mr: the memory region that was changed | |
614 | * @entry: the new entry in the IOMMU translation table. The entry | |
615 | * replaces all old entries for the same virtual I/O address range. | |
616 | * Deleted entries have .@perm == 0. | |
617 | */ | |
618 | void memory_region_notify_iommu(MemoryRegion *mr, | |
619 | IOMMUTLBEntry entry); | |
620 | ||
621 | /** | |
622 | * memory_region_register_iommu_notifier: register a notifier for changes to | |
623 | * IOMMU translation entries. | |
624 | * | |
625 | * @mr: the memory region to observe | |
626 | * @n: the notifier to be added; the notifier receives a pointer to an | |
627 | * #IOMMUTLBEntry as the opaque value; the pointer ceases to be | |
628 | * valid on exit from the notifier. | |
629 | */ | |
630 | void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n); | |
631 | ||
a788f227 DG |
632 | /** |
633 | * memory_region_iommu_replay: replay existing IOMMU translations to | |
f682e9c2 AK |
634 | * a notifier with the minimum page granularity returned by |
635 | * mr->iommu_ops->get_page_size(). | |
a788f227 DG |
636 | * |
637 | * @mr: the memory region to observe | |
638 | * @n: the notifier to which to replay iommu mappings | |
a788f227 DG |
639 | * @is_write: Whether to treat the replay as a translate "write" |
640 | * through the iommu | |
641 | */ | |
f682e9c2 | 642 | void memory_region_iommu_replay(MemoryRegion *mr, Notifier *n, bool is_write); |
a788f227 | 643 | |
06866575 DG |
644 | /** |
645 | * memory_region_unregister_iommu_notifier: unregister a notifier for | |
646 | * changes to IOMMU translation entries. | |
647 | * | |
d22d8956 AK |
648 | * @mr: the memory region which was observed and for which notity_stopped() |
649 | * needs to be called | |
06866575 DG |
650 | * @n: the notifier to be removed. |
651 | */ | |
d22d8956 | 652 | void memory_region_unregister_iommu_notifier(MemoryRegion *mr, Notifier *n); |
06866575 | 653 | |
8991c79b AK |
654 | /** |
655 | * memory_region_name: get a memory region's name | |
656 | * | |
657 | * Returns the string that was used to initialize the memory region. | |
658 | * | |
659 | * @mr: the memory region being queried | |
660 | */ | |
5d546d4b | 661 | const char *memory_region_name(const MemoryRegion *mr); |
8991c79b | 662 | |
55043ba3 AK |
663 | /** |
664 | * memory_region_is_logging: return whether a memory region is logging writes | |
665 | * | |
2d1a35be | 666 | * Returns %true if the memory region is logging writes for the given client |
55043ba3 AK |
667 | * |
668 | * @mr: the memory region being queried | |
2d1a35be | 669 | * @client: the client being queried |
55043ba3 | 670 | */ |
2d1a35be PB |
671 | bool memory_region_is_logging(MemoryRegion *mr, uint8_t client); |
672 | ||
673 | /** | |
674 | * memory_region_get_dirty_log_mask: return the clients for which a | |
675 | * memory region is logging writes. | |
676 | * | |
677e7805 PB |
677 | * Returns a bitmap of clients, in which the DIRTY_MEMORY_* constants |
678 | * are the bit indices. | |
2d1a35be PB |
679 | * |
680 | * @mr: the memory region being queried | |
681 | */ | |
682 | uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr); | |
55043ba3 | 683 | |
ce7923da AK |
684 | /** |
685 | * memory_region_is_rom: check whether a memory region is ROM | |
686 | * | |
687 | * Returns %true is a memory region is read-only memory. | |
688 | * | |
689 | * @mr: the memory region being queried | |
690 | */ | |
1619d1fe PB |
691 | static inline bool memory_region_is_rom(MemoryRegion *mr) |
692 | { | |
693 | return mr->ram && mr->readonly; | |
694 | } | |
695 | ||
ce7923da | 696 | |
a35ba7be PB |
697 | /** |
698 | * memory_region_get_fd: Get a file descriptor backing a RAM memory region. | |
699 | * | |
700 | * Returns a file descriptor backing a file-based RAM memory region, | |
701 | * or -1 if the region is not a file-based RAM memory region. | |
702 | * | |
703 | * @mr: the RAM or alias memory region being queried. | |
704 | */ | |
705 | int memory_region_get_fd(MemoryRegion *mr); | |
706 | ||
4ff87573 PB |
707 | /** |
708 | * memory_region_set_fd: Mark a RAM memory region as backed by a | |
709 | * file descriptor. | |
710 | * | |
711 | * This function is typically used after memory_region_init_ram_ptr(). | |
712 | * | |
713 | * @mr: the memory region being queried. | |
714 | * @fd: the file descriptor that backs @mr. | |
715 | */ | |
716 | void memory_region_set_fd(MemoryRegion *mr, int fd); | |
717 | ||
07bdaa41 PB |
718 | /** |
719 | * memory_region_from_host: Convert a pointer into a RAM memory region | |
720 | * and an offset within it. | |
721 | * | |
722 | * Given a host pointer inside a RAM memory region (created with | |
723 | * memory_region_init_ram() or memory_region_init_ram_ptr()), return | |
724 | * the MemoryRegion and the offset within it. | |
725 | * | |
726 | * Use with care; by the time this function returns, the returned pointer is | |
727 | * not protected by RCU anymore. If the caller is not within an RCU critical | |
728 | * section and does not hold the iothread lock, it must have other means of | |
729 | * protecting the pointer, such as a reference to the region that includes | |
730 | * the incoming ram_addr_t. | |
731 | * | |
732 | * @mr: the memory region being queried. | |
733 | */ | |
734 | MemoryRegion *memory_region_from_host(void *ptr, ram_addr_t *offset); | |
735 | ||
093bc2cd AK |
736 | /** |
737 | * memory_region_get_ram_ptr: Get a pointer into a RAM memory region. | |
738 | * | |
739 | * Returns a host pointer to a RAM memory region (created with | |
49b24afc PB |
740 | * memory_region_init_ram() or memory_region_init_ram_ptr()). |
741 | * | |
742 | * Use with care; by the time this function returns, the returned pointer is | |
743 | * not protected by RCU anymore. If the caller is not within an RCU critical | |
744 | * section and does not hold the iothread lock, it must have other means of | |
745 | * protecting the pointer, such as a reference to the region that includes | |
746 | * the incoming ram_addr_t. | |
093bc2cd AK |
747 | * |
748 | * @mr: the memory region being queried. | |
749 | */ | |
750 | void *memory_region_get_ram_ptr(MemoryRegion *mr); | |
751 | ||
37d7c084 PB |
752 | /* memory_region_ram_resize: Resize a RAM region. |
753 | * | |
754 | * Only legal before guest might have detected the memory size: e.g. on | |
755 | * incoming migration, or right after reset. | |
756 | * | |
757 | * @mr: a memory region created with @memory_region_init_resizeable_ram. | |
758 | * @newsize: the new size the region | |
759 | * @errp: pointer to Error*, to store an error if it happens. | |
760 | */ | |
761 | void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, | |
762 | Error **errp); | |
763 | ||
093bc2cd AK |
764 | /** |
765 | * memory_region_set_log: Turn dirty logging on or off for a region. | |
766 | * | |
767 | * Turns dirty logging on or off for a specified client (display, migration). | |
768 | * Only meaningful for RAM regions. | |
769 | * | |
770 | * @mr: the memory region being updated. | |
771 | * @log: whether dirty logging is to be enabled or disabled. | |
dbddac6d | 772 | * @client: the user of the logging information; %DIRTY_MEMORY_VGA only. |
093bc2cd AK |
773 | */ |
774 | void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client); | |
775 | ||
776 | /** | |
cd7a45c9 BS |
777 | * memory_region_get_dirty: Check whether a range of bytes is dirty |
778 | * for a specified client. | |
093bc2cd | 779 | * |
cd7a45c9 | 780 | * Checks whether a range of bytes has been written to since the last |
093bc2cd AK |
781 | * call to memory_region_reset_dirty() with the same @client. Dirty logging |
782 | * must be enabled. | |
783 | * | |
784 | * @mr: the memory region being queried. | |
785 | * @addr: the address (relative to the start of the region) being queried. | |
cd7a45c9 | 786 | * @size: the size of the range being queried. |
093bc2cd AK |
787 | * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or |
788 | * %DIRTY_MEMORY_VGA. | |
789 | */ | |
a8170e5e AK |
790 | bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr, |
791 | hwaddr size, unsigned client); | |
093bc2cd AK |
792 | |
793 | /** | |
fd4aa979 | 794 | * memory_region_set_dirty: Mark a range of bytes as dirty in a memory region. |
093bc2cd | 795 | * |
fd4aa979 BS |
796 | * Marks a range of bytes as dirty, after it has been dirtied outside |
797 | * guest code. | |
093bc2cd | 798 | * |
fd4aa979 | 799 | * @mr: the memory region being dirtied. |
093bc2cd | 800 | * @addr: the address (relative to the start of the region) being dirtied. |
fd4aa979 | 801 | * @size: size of the range being dirtied. |
093bc2cd | 802 | */ |
a8170e5e AK |
803 | void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr, |
804 | hwaddr size); | |
093bc2cd | 805 | |
6c279db8 JQ |
806 | /** |
807 | * memory_region_test_and_clear_dirty: Check whether a range of bytes is dirty | |
808 | * for a specified client. It clears them. | |
809 | * | |
810 | * Checks whether a range of bytes has been written to since the last | |
811 | * call to memory_region_reset_dirty() with the same @client. Dirty logging | |
812 | * must be enabled. | |
813 | * | |
814 | * @mr: the memory region being queried. | |
815 | * @addr: the address (relative to the start of the region) being queried. | |
816 | * @size: the size of the range being queried. | |
817 | * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or | |
818 | * %DIRTY_MEMORY_VGA. | |
819 | */ | |
820 | bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr, | |
821 | hwaddr size, unsigned client); | |
093bc2cd AK |
822 | /** |
823 | * memory_region_sync_dirty_bitmap: Synchronize a region's dirty bitmap with | |
824 | * any external TLBs (e.g. kvm) | |
825 | * | |
826 | * Flushes dirty information from accelerators such as kvm and vhost-net | |
827 | * and makes it available to users of the memory API. | |
828 | * | |
829 | * @mr: the region being flushed. | |
830 | */ | |
831 | void memory_region_sync_dirty_bitmap(MemoryRegion *mr); | |
832 | ||
833 | /** | |
834 | * memory_region_reset_dirty: Mark a range of pages as clean, for a specified | |
835 | * client. | |
836 | * | |
837 | * Marks a range of pages as no longer dirty. | |
838 | * | |
839 | * @mr: the region being updated. | |
840 | * @addr: the start of the subrange being cleaned. | |
841 | * @size: the size of the subrange being cleaned. | |
842 | * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or | |
843 | * %DIRTY_MEMORY_VGA. | |
844 | */ | |
a8170e5e AK |
845 | void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr, |
846 | hwaddr size, unsigned client); | |
093bc2cd AK |
847 | |
848 | /** | |
849 | * memory_region_set_readonly: Turn a memory region read-only (or read-write) | |
850 | * | |
851 | * Allows a memory region to be marked as read-only (turning it into a ROM). | |
852 | * only useful on RAM regions. | |
853 | * | |
854 | * @mr: the region being updated. | |
855 | * @readonly: whether rhe region is to be ROM or RAM. | |
856 | */ | |
857 | void memory_region_set_readonly(MemoryRegion *mr, bool readonly); | |
858 | ||
d0a9b5bc | 859 | /** |
5f9a5ea1 | 860 | * memory_region_rom_device_set_romd: enable/disable ROMD mode |
d0a9b5bc AK |
861 | * |
862 | * Allows a ROM device (initialized with memory_region_init_rom_device() to | |
5f9a5ea1 JK |
863 | * set to ROMD mode (default) or MMIO mode. When it is in ROMD mode, the |
864 | * device is mapped to guest memory and satisfies read access directly. | |
865 | * When in MMIO mode, reads are forwarded to the #MemoryRegion.read function. | |
866 | * Writes are always handled by the #MemoryRegion.write function. | |
d0a9b5bc AK |
867 | * |
868 | * @mr: the memory region to be updated | |
5f9a5ea1 | 869 | * @romd_mode: %true to put the region into ROMD mode |
d0a9b5bc | 870 | */ |
5f9a5ea1 | 871 | void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode); |
d0a9b5bc | 872 | |
093bc2cd AK |
873 | /** |
874 | * memory_region_set_coalescing: Enable memory coalescing for the region. | |
875 | * | |
876 | * Enabled writes to a region to be queued for later processing. MMIO ->write | |
877 | * callbacks may be delayed until a non-coalesced MMIO is issued. | |
878 | * Only useful for IO regions. Roughly similar to write-combining hardware. | |
879 | * | |
880 | * @mr: the memory region to be write coalesced | |
881 | */ | |
882 | void memory_region_set_coalescing(MemoryRegion *mr); | |
883 | ||
884 | /** | |
885 | * memory_region_add_coalescing: Enable memory coalescing for a sub-range of | |
886 | * a region. | |
887 | * | |
888 | * Like memory_region_set_coalescing(), but works on a sub-range of a region. | |
889 | * Multiple calls can be issued coalesced disjoint ranges. | |
890 | * | |
891 | * @mr: the memory region to be updated. | |
892 | * @offset: the start of the range within the region to be coalesced. | |
893 | * @size: the size of the subrange to be coalesced. | |
894 | */ | |
895 | void memory_region_add_coalescing(MemoryRegion *mr, | |
a8170e5e | 896 | hwaddr offset, |
093bc2cd AK |
897 | uint64_t size); |
898 | ||
899 | /** | |
900 | * memory_region_clear_coalescing: Disable MMIO coalescing for the region. | |
901 | * | |
902 | * Disables any coalescing caused by memory_region_set_coalescing() or | |
903 | * memory_region_add_coalescing(). Roughly equivalent to uncacheble memory | |
904 | * hardware. | |
905 | * | |
906 | * @mr: the memory region to be updated. | |
907 | */ | |
908 | void memory_region_clear_coalescing(MemoryRegion *mr); | |
909 | ||
d410515e JK |
910 | /** |
911 | * memory_region_set_flush_coalesced: Enforce memory coalescing flush before | |
912 | * accesses. | |
913 | * | |
914 | * Ensure that pending coalesced MMIO request are flushed before the memory | |
915 | * region is accessed. This property is automatically enabled for all regions | |
916 | * passed to memory_region_set_coalescing() and memory_region_add_coalescing(). | |
917 | * | |
918 | * @mr: the memory region to be updated. | |
919 | */ | |
920 | void memory_region_set_flush_coalesced(MemoryRegion *mr); | |
921 | ||
922 | /** | |
923 | * memory_region_clear_flush_coalesced: Disable memory coalescing flush before | |
924 | * accesses. | |
925 | * | |
926 | * Clear the automatic coalesced MMIO flushing enabled via | |
927 | * memory_region_set_flush_coalesced. Note that this service has no effect on | |
928 | * memory regions that have MMIO coalescing enabled for themselves. For them, | |
929 | * automatic flushing will stop once coalescing is disabled. | |
930 | * | |
931 | * @mr: the memory region to be updated. | |
932 | */ | |
933 | void memory_region_clear_flush_coalesced(MemoryRegion *mr); | |
934 | ||
196ea131 JK |
935 | /** |
936 | * memory_region_set_global_locking: Declares the access processing requires | |
937 | * QEMU's global lock. | |
938 | * | |
939 | * When this is invoked, accesses to the memory region will be processed while | |
940 | * holding the global lock of QEMU. This is the default behavior of memory | |
941 | * regions. | |
942 | * | |
943 | * @mr: the memory region to be updated. | |
944 | */ | |
945 | void memory_region_set_global_locking(MemoryRegion *mr); | |
946 | ||
947 | /** | |
948 | * memory_region_clear_global_locking: Declares that access processing does | |
949 | * not depend on the QEMU global lock. | |
950 | * | |
951 | * By clearing this property, accesses to the memory region will be processed | |
952 | * outside of QEMU's global lock (unless the lock is held on when issuing the | |
953 | * access request). In this case, the device model implementing the access | |
954 | * handlers is responsible for synchronization of concurrency. | |
955 | * | |
956 | * @mr: the memory region to be updated. | |
957 | */ | |
958 | void memory_region_clear_global_locking(MemoryRegion *mr); | |
959 | ||
3e9d69e7 AK |
960 | /** |
961 | * memory_region_add_eventfd: Request an eventfd to be triggered when a word | |
962 | * is written to a location. | |
963 | * | |
964 | * Marks a word in an IO region (initialized with memory_region_init_io()) | |
965 | * as a trigger for an eventfd event. The I/O callback will not be called. | |
69ddaf66 | 966 | * The caller must be prepared to handle failure (that is, take the required |
3e9d69e7 AK |
967 | * action if the callback _is_ called). |
968 | * | |
969 | * @mr: the memory region being updated. | |
970 | * @addr: the address within @mr that is to be monitored | |
971 | * @size: the size of the access to trigger the eventfd | |
972 | * @match_data: whether to match against @data, instead of just @addr | |
973 | * @data: the data to match against the guest write | |
974 | * @fd: the eventfd to be triggered when @addr, @size, and @data all match. | |
975 | **/ | |
976 | void memory_region_add_eventfd(MemoryRegion *mr, | |
a8170e5e | 977 | hwaddr addr, |
3e9d69e7 AK |
978 | unsigned size, |
979 | bool match_data, | |
980 | uint64_t data, | |
753d5e14 | 981 | EventNotifier *e); |
3e9d69e7 AK |
982 | |
983 | /** | |
69ddaf66 | 984 | * memory_region_del_eventfd: Cancel an eventfd. |
3e9d69e7 | 985 | * |
69ddaf66 ASRJ |
986 | * Cancels an eventfd trigger requested by a previous |
987 | * memory_region_add_eventfd() call. | |
3e9d69e7 AK |
988 | * |
989 | * @mr: the memory region being updated. | |
990 | * @addr: the address within @mr that is to be monitored | |
991 | * @size: the size of the access to trigger the eventfd | |
992 | * @match_data: whether to match against @data, instead of just @addr | |
993 | * @data: the data to match against the guest write | |
994 | * @fd: the eventfd to be triggered when @addr, @size, and @data all match. | |
995 | */ | |
996 | void memory_region_del_eventfd(MemoryRegion *mr, | |
a8170e5e | 997 | hwaddr addr, |
3e9d69e7 AK |
998 | unsigned size, |
999 | bool match_data, | |
1000 | uint64_t data, | |
753d5e14 PB |
1001 | EventNotifier *e); |
1002 | ||
093bc2cd | 1003 | /** |
69ddaf66 | 1004 | * memory_region_add_subregion: Add a subregion to a container. |
093bc2cd | 1005 | * |
69ddaf66 | 1006 | * Adds a subregion at @offset. The subregion may not overlap with other |
093bc2cd AK |
1007 | * subregions (except for those explicitly marked as overlapping). A region |
1008 | * may only be added once as a subregion (unless removed with | |
1009 | * memory_region_del_subregion()); use memory_region_init_alias() if you | |
1010 | * want a region to be a subregion in multiple locations. | |
1011 | * | |
1012 | * @mr: the region to contain the new subregion; must be a container | |
1013 | * initialized with memory_region_init(). | |
1014 | * @offset: the offset relative to @mr where @subregion is added. | |
1015 | * @subregion: the subregion to be added. | |
1016 | */ | |
1017 | void memory_region_add_subregion(MemoryRegion *mr, | |
a8170e5e | 1018 | hwaddr offset, |
093bc2cd AK |
1019 | MemoryRegion *subregion); |
1020 | /** | |
1a7e8cae BZ |
1021 | * memory_region_add_subregion_overlap: Add a subregion to a container |
1022 | * with overlap. | |
093bc2cd | 1023 | * |
69ddaf66 | 1024 | * Adds a subregion at @offset. The subregion may overlap with other |
093bc2cd AK |
1025 | * subregions. Conflicts are resolved by having a higher @priority hide a |
1026 | * lower @priority. Subregions without priority are taken as @priority 0. | |
1027 | * A region may only be added once as a subregion (unless removed with | |
1028 | * memory_region_del_subregion()); use memory_region_init_alias() if you | |
1029 | * want a region to be a subregion in multiple locations. | |
1030 | * | |
1031 | * @mr: the region to contain the new subregion; must be a container | |
1032 | * initialized with memory_region_init(). | |
1033 | * @offset: the offset relative to @mr where @subregion is added. | |
1034 | * @subregion: the subregion to be added. | |
1035 | * @priority: used for resolving overlaps; highest priority wins. | |
1036 | */ | |
1037 | void memory_region_add_subregion_overlap(MemoryRegion *mr, | |
a8170e5e | 1038 | hwaddr offset, |
093bc2cd | 1039 | MemoryRegion *subregion, |
a1ff8ae0 | 1040 | int priority); |
e34911c4 AK |
1041 | |
1042 | /** | |
1043 | * memory_region_get_ram_addr: Get the ram address associated with a memory | |
1044 | * region | |
e34911c4 | 1045 | */ |
7ebb2745 | 1046 | ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr); |
e34911c4 | 1047 | |
a2b257d6 | 1048 | uint64_t memory_region_get_alignment(const MemoryRegion *mr); |
093bc2cd AK |
1049 | /** |
1050 | * memory_region_del_subregion: Remove a subregion. | |
1051 | * | |
1052 | * Removes a subregion from its container. | |
1053 | * | |
1054 | * @mr: the container to be updated. | |
1055 | * @subregion: the region being removed; must be a current subregion of @mr. | |
1056 | */ | |
1057 | void memory_region_del_subregion(MemoryRegion *mr, | |
1058 | MemoryRegion *subregion); | |
1059 | ||
6bba19ba AK |
1060 | /* |
1061 | * memory_region_set_enabled: dynamically enable or disable a region | |
1062 | * | |
1063 | * Enables or disables a memory region. A disabled memory region | |
1064 | * ignores all accesses to itself and its subregions. It does not | |
1065 | * obscure sibling subregions with lower priority - it simply behaves as | |
1066 | * if it was removed from the hierarchy. | |
1067 | * | |
1068 | * Regions default to being enabled. | |
1069 | * | |
1070 | * @mr: the region to be updated | |
1071 | * @enabled: whether to enable or disable the region | |
1072 | */ | |
1073 | void memory_region_set_enabled(MemoryRegion *mr, bool enabled); | |
1074 | ||
2282e1af AK |
1075 | /* |
1076 | * memory_region_set_address: dynamically update the address of a region | |
1077 | * | |
feca4ac1 | 1078 | * Dynamically updates the address of a region, relative to its container. |
2282e1af AK |
1079 | * May be used on regions are currently part of a memory hierarchy. |
1080 | * | |
1081 | * @mr: the region to be updated | |
feca4ac1 | 1082 | * @addr: new address, relative to container region |
2282e1af | 1083 | */ |
a8170e5e | 1084 | void memory_region_set_address(MemoryRegion *mr, hwaddr addr); |
2282e1af | 1085 | |
e7af4c67 MT |
1086 | /* |
1087 | * memory_region_set_size: dynamically update the size of a region. | |
1088 | * | |
1089 | * Dynamically updates the size of a region. | |
1090 | * | |
1091 | * @mr: the region to be updated | |
1092 | * @size: used size of the region. | |
1093 | */ | |
1094 | void memory_region_set_size(MemoryRegion *mr, uint64_t size); | |
1095 | ||
4703359e AK |
1096 | /* |
1097 | * memory_region_set_alias_offset: dynamically update a memory alias's offset | |
1098 | * | |
1099 | * Dynamically updates the offset into the target region that an alias points | |
1100 | * to, as if the fourth argument to memory_region_init_alias() has changed. | |
1101 | * | |
1102 | * @mr: the #MemoryRegion to be updated; should be an alias. | |
1103 | * @offset: the new offset into the target memory region | |
1104 | */ | |
1105 | void memory_region_set_alias_offset(MemoryRegion *mr, | |
a8170e5e | 1106 | hwaddr offset); |
4703359e | 1107 | |
3ce10901 | 1108 | /** |
feca4ac1 PB |
1109 | * memory_region_present: checks if an address relative to a @container |
1110 | * translates into #MemoryRegion within @container | |
3ce10901 | 1111 | * |
feca4ac1 | 1112 | * Answer whether a #MemoryRegion within @container covers the address |
3ce10901 PB |
1113 | * @addr. |
1114 | * | |
feca4ac1 PB |
1115 | * @container: a #MemoryRegion within which @addr is a relative address |
1116 | * @addr: the area within @container to be searched | |
3ce10901 | 1117 | */ |
feca4ac1 | 1118 | bool memory_region_present(MemoryRegion *container, hwaddr addr); |
3ce10901 | 1119 | |
eed2bacf IM |
1120 | /** |
1121 | * memory_region_is_mapped: returns true if #MemoryRegion is mapped | |
1122 | * into any address space. | |
1123 | * | |
1124 | * @mr: a #MemoryRegion which should be checked if it's mapped | |
1125 | */ | |
1126 | bool memory_region_is_mapped(MemoryRegion *mr); | |
1127 | ||
e2177955 | 1128 | /** |
73034e9e PB |
1129 | * memory_region_find: translate an address/size relative to a |
1130 | * MemoryRegion into a #MemoryRegionSection. | |
e2177955 | 1131 | * |
73034e9e PB |
1132 | * Locates the first #MemoryRegion within @mr that overlaps the range |
1133 | * given by @addr and @size. | |
e2177955 AK |
1134 | * |
1135 | * Returns a #MemoryRegionSection that describes a contiguous overlap. | |
1136 | * It will have the following characteristics: | |
e2177955 AK |
1137 | * .@size = 0 iff no overlap was found |
1138 | * .@mr is non-%NULL iff an overlap was found | |
1139 | * | |
73034e9e PB |
1140 | * Remember that in the return value the @offset_within_region is |
1141 | * relative to the returned region (in the .@mr field), not to the | |
1142 | * @mr argument. | |
1143 | * | |
1144 | * Similarly, the .@offset_within_address_space is relative to the | |
1145 | * address space that contains both regions, the passed and the | |
1146 | * returned one. However, in the special case where the @mr argument | |
feca4ac1 | 1147 | * has no container (and thus is the root of the address space), the |
73034e9e PB |
1148 | * following will hold: |
1149 | * .@offset_within_address_space >= @addr | |
1150 | * .@offset_within_address_space + .@size <= @addr + @size | |
1151 | * | |
1152 | * @mr: a MemoryRegion within which @addr is a relative address | |
1153 | * @addr: start of the area within @as to be searched | |
e2177955 AK |
1154 | * @size: size of the area to be searched |
1155 | */ | |
73034e9e | 1156 | MemoryRegionSection memory_region_find(MemoryRegion *mr, |
a8170e5e | 1157 | hwaddr addr, uint64_t size); |
e2177955 | 1158 | |
86e775c6 | 1159 | /** |
1d671369 | 1160 | * address_space_sync_dirty_bitmap: synchronize the dirty log for all memory |
86e775c6 AK |
1161 | * |
1162 | * Synchronizes the dirty page log for an entire address space. | |
1d671369 | 1163 | * @as: the address space that contains the memory being synchronized |
86e775c6 | 1164 | */ |
1d671369 | 1165 | void address_space_sync_dirty_bitmap(AddressSpace *as); |
86e775c6 | 1166 | |
69ddaf66 ASRJ |
1167 | /** |
1168 | * memory_region_transaction_begin: Start a transaction. | |
1169 | * | |
1170 | * During a transaction, changes will be accumulated and made visible | |
dabdf394 | 1171 | * only when the transaction ends (is committed). |
4ef4db86 AK |
1172 | */ |
1173 | void memory_region_transaction_begin(void); | |
69ddaf66 ASRJ |
1174 | |
1175 | /** | |
1176 | * memory_region_transaction_commit: Commit a transaction and make changes | |
1177 | * visible to the guest. | |
4ef4db86 AK |
1178 | */ |
1179 | void memory_region_transaction_commit(void); | |
1180 | ||
7664e80c AK |
1181 | /** |
1182 | * memory_listener_register: register callbacks to be called when memory | |
1183 | * sections are mapped or unmapped into an address | |
1184 | * space | |
1185 | * | |
1186 | * @listener: an object containing the callbacks to be called | |
7376e582 | 1187 | * @filter: if non-%NULL, only regions in this address space will be observed |
7664e80c | 1188 | */ |
f6790af6 | 1189 | void memory_listener_register(MemoryListener *listener, AddressSpace *filter); |
7664e80c AK |
1190 | |
1191 | /** | |
1192 | * memory_listener_unregister: undo the effect of memory_listener_register() | |
1193 | * | |
1194 | * @listener: an object containing the callbacks to be removed | |
1195 | */ | |
1196 | void memory_listener_unregister(MemoryListener *listener); | |
1197 | ||
1198 | /** | |
1199 | * memory_global_dirty_log_start: begin dirty logging for all regions | |
1200 | */ | |
1201 | void memory_global_dirty_log_start(void); | |
1202 | ||
1203 | /** | |
1a7e8cae | 1204 | * memory_global_dirty_log_stop: end dirty logging for all regions |
7664e80c AK |
1205 | */ |
1206 | void memory_global_dirty_log_stop(void); | |
1207 | ||
314e2987 BS |
1208 | void mtree_info(fprintf_function mon_printf, void *f); |
1209 | ||
3b643495 PM |
1210 | /** |
1211 | * memory_region_dispatch_read: perform a read directly to the specified | |
1212 | * MemoryRegion. | |
1213 | * | |
1214 | * @mr: #MemoryRegion to access | |
1215 | * @addr: address within that region | |
1216 | * @pval: pointer to uint64_t which the data is written to | |
1217 | * @size: size of the access in bytes | |
1218 | * @attrs: memory transaction attributes to use for the access | |
1219 | */ | |
1220 | MemTxResult memory_region_dispatch_read(MemoryRegion *mr, | |
1221 | hwaddr addr, | |
1222 | uint64_t *pval, | |
1223 | unsigned size, | |
1224 | MemTxAttrs attrs); | |
1225 | /** | |
1226 | * memory_region_dispatch_write: perform a write directly to the specified | |
1227 | * MemoryRegion. | |
1228 | * | |
1229 | * @mr: #MemoryRegion to access | |
1230 | * @addr: address within that region | |
1231 | * @data: data to write | |
1232 | * @size: size of the access in bytes | |
1233 | * @attrs: memory transaction attributes to use for the access | |
1234 | */ | |
1235 | MemTxResult memory_region_dispatch_write(MemoryRegion *mr, | |
1236 | hwaddr addr, | |
1237 | uint64_t data, | |
1238 | unsigned size, | |
1239 | MemTxAttrs attrs); | |
1240 | ||
9ad2bbc1 AK |
1241 | /** |
1242 | * address_space_init: initializes an address space | |
1243 | * | |
1244 | * @as: an uninitialized #AddressSpace | |
67cc32eb | 1245 | * @root: a #MemoryRegion that routes addresses for the address space |
7dca8043 AK |
1246 | * @name: an address space name. The name is only used for debugging |
1247 | * output. | |
9ad2bbc1 | 1248 | */ |
7dca8043 | 1249 | void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name); |
9ad2bbc1 | 1250 | |
f0c02d15 PC |
1251 | /** |
1252 | * address_space_init_shareable: return an address space for a memory region, | |
1253 | * creating it if it does not already exist | |
1254 | * | |
1255 | * @root: a #MemoryRegion that routes addresses for the address space | |
1256 | * @name: an address space name. The name is only used for debugging | |
1257 | * output. | |
1258 | * | |
1259 | * This function will return a pointer to an existing AddressSpace | |
1260 | * which was initialized with the specified MemoryRegion, or it will | |
1261 | * create and initialize one if it does not already exist. The ASes | |
1262 | * are reference-counted, so the memory will be freed automatically | |
1263 | * when the AddressSpace is destroyed via address_space_destroy. | |
1264 | */ | |
1265 | AddressSpace *address_space_init_shareable(MemoryRegion *root, | |
1266 | const char *name); | |
83f3c251 AK |
1267 | |
1268 | /** | |
1269 | * address_space_destroy: destroy an address space | |
1270 | * | |
1271 | * Releases all resources associated with an address space. After an address space | |
1272 | * is destroyed, its root memory region (given by address_space_init()) may be destroyed | |
1273 | * as well. | |
1274 | * | |
1275 | * @as: address space to be destroyed | |
1276 | */ | |
1277 | void address_space_destroy(AddressSpace *as); | |
1278 | ||
ac1970fb AK |
1279 | /** |
1280 | * address_space_rw: read from or write to an address space. | |
1281 | * | |
5c9eb028 PM |
1282 | * Return a MemTxResult indicating whether the operation succeeded |
1283 | * or failed (eg unassigned memory, device rejected the transaction, | |
1284 | * IOMMU fault). | |
fd8aaa76 | 1285 | * |
ac1970fb AK |
1286 | * @as: #AddressSpace to be accessed |
1287 | * @addr: address within that address space | |
5c9eb028 | 1288 | * @attrs: memory transaction attributes |
ac1970fb AK |
1289 | * @buf: buffer with the data transferred |
1290 | * @is_write: indicates the transfer direction | |
1291 | */ | |
5c9eb028 PM |
1292 | MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, |
1293 | MemTxAttrs attrs, uint8_t *buf, | |
1294 | int len, bool is_write); | |
ac1970fb AK |
1295 | |
1296 | /** | |
1297 | * address_space_write: write to address space. | |
1298 | * | |
5c9eb028 PM |
1299 | * Return a MemTxResult indicating whether the operation succeeded |
1300 | * or failed (eg unassigned memory, device rejected the transaction, | |
1301 | * IOMMU fault). | |
fd8aaa76 | 1302 | * |
ac1970fb AK |
1303 | * @as: #AddressSpace to be accessed |
1304 | * @addr: address within that address space | |
5c9eb028 | 1305 | * @attrs: memory transaction attributes |
ac1970fb AK |
1306 | * @buf: buffer with the data transferred |
1307 | */ | |
5c9eb028 PM |
1308 | MemTxResult address_space_write(AddressSpace *as, hwaddr addr, |
1309 | MemTxAttrs attrs, | |
1310 | const uint8_t *buf, int len); | |
ac1970fb | 1311 | |
3cc8f884 | 1312 | /* address_space_ld*: load from an address space |
50013115 PM |
1313 | * address_space_st*: store to an address space |
1314 | * | |
1315 | * These functions perform a load or store of the byte, word, | |
1316 | * longword or quad to the specified address within the AddressSpace. | |
1317 | * The _le suffixed functions treat the data as little endian; | |
1318 | * _be indicates big endian; no suffix indicates "same endianness | |
1319 | * as guest CPU". | |
1320 | * | |
1321 | * The "guest CPU endianness" accessors are deprecated for use outside | |
1322 | * target-* code; devices should be CPU-agnostic and use either the LE | |
1323 | * or the BE accessors. | |
1324 | * | |
1325 | * @as #AddressSpace to be accessed | |
1326 | * @addr: address within that address space | |
1327 | * @val: data value, for stores | |
1328 | * @attrs: memory transaction attributes | |
1329 | * @result: location to write the success/failure of the transaction; | |
1330 | * if NULL, this information is discarded | |
1331 | */ | |
1332 | uint32_t address_space_ldub(AddressSpace *as, hwaddr addr, | |
1333 | MemTxAttrs attrs, MemTxResult *result); | |
1334 | uint32_t address_space_lduw_le(AddressSpace *as, hwaddr addr, | |
1335 | MemTxAttrs attrs, MemTxResult *result); | |
1336 | uint32_t address_space_lduw_be(AddressSpace *as, hwaddr addr, | |
1337 | MemTxAttrs attrs, MemTxResult *result); | |
1338 | uint32_t address_space_ldl_le(AddressSpace *as, hwaddr addr, | |
1339 | MemTxAttrs attrs, MemTxResult *result); | |
1340 | uint32_t address_space_ldl_be(AddressSpace *as, hwaddr addr, | |
1341 | MemTxAttrs attrs, MemTxResult *result); | |
1342 | uint64_t address_space_ldq_le(AddressSpace *as, hwaddr addr, | |
1343 | MemTxAttrs attrs, MemTxResult *result); | |
1344 | uint64_t address_space_ldq_be(AddressSpace *as, hwaddr addr, | |
1345 | MemTxAttrs attrs, MemTxResult *result); | |
1346 | void address_space_stb(AddressSpace *as, hwaddr addr, uint32_t val, | |
1347 | MemTxAttrs attrs, MemTxResult *result); | |
1348 | void address_space_stw_le(AddressSpace *as, hwaddr addr, uint32_t val, | |
1349 | MemTxAttrs attrs, MemTxResult *result); | |
1350 | void address_space_stw_be(AddressSpace *as, hwaddr addr, uint32_t val, | |
1351 | MemTxAttrs attrs, MemTxResult *result); | |
1352 | void address_space_stl_le(AddressSpace *as, hwaddr addr, uint32_t val, | |
1353 | MemTxAttrs attrs, MemTxResult *result); | |
1354 | void address_space_stl_be(AddressSpace *as, hwaddr addr, uint32_t val, | |
1355 | MemTxAttrs attrs, MemTxResult *result); | |
1356 | void address_space_stq_le(AddressSpace *as, hwaddr addr, uint64_t val, | |
1357 | MemTxAttrs attrs, MemTxResult *result); | |
1358 | void address_space_stq_be(AddressSpace *as, hwaddr addr, uint64_t val, | |
1359 | MemTxAttrs attrs, MemTxResult *result); | |
1360 | ||
149f54b5 | 1361 | /* address_space_translate: translate an address range into an address space |
41063e1e PB |
1362 | * into a MemoryRegion and an address range into that section. Should be |
1363 | * called from an RCU critical section, to avoid that the last reference | |
1364 | * to the returned region disappears after address_space_translate returns. | |
149f54b5 PB |
1365 | * |
1366 | * @as: #AddressSpace to be accessed | |
1367 | * @addr: address within that address space | |
1368 | * @xlat: pointer to address within the returned memory region section's | |
1369 | * #MemoryRegion. | |
1370 | * @len: pointer to length | |
1371 | * @is_write: indicates the transfer direction | |
1372 | */ | |
5c8a00ce PB |
1373 | MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr, |
1374 | hwaddr *xlat, hwaddr *len, | |
1375 | bool is_write); | |
149f54b5 | 1376 | |
51644ab7 PB |
1377 | /* address_space_access_valid: check for validity of accessing an address |
1378 | * space range | |
1379 | * | |
30951157 AK |
1380 | * Check whether memory is assigned to the given address space range, and |
1381 | * access is permitted by any IOMMU regions that are active for the address | |
1382 | * space. | |
51644ab7 PB |
1383 | * |
1384 | * For now, addr and len should be aligned to a page size. This limitation | |
1385 | * will be lifted in the future. | |
1386 | * | |
1387 | * @as: #AddressSpace to be accessed | |
1388 | * @addr: address within that address space | |
1389 | * @len: length of the area to be checked | |
1390 | * @is_write: indicates the transfer direction | |
1391 | */ | |
1392 | bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write); | |
1393 | ||
ac1970fb AK |
1394 | /* address_space_map: map a physical memory region into a host virtual address |
1395 | * | |
1396 | * May map a subset of the requested range, given by and returned in @plen. | |
1397 | * May return %NULL if resources needed to perform the mapping are exhausted. | |
1398 | * Use only for reads OR writes - not for read-modify-write operations. | |
1399 | * Use cpu_register_map_client() to know when retrying the map operation is | |
1400 | * likely to succeed. | |
1401 | * | |
1402 | * @as: #AddressSpace to be accessed | |
1403 | * @addr: address within that address space | |
1404 | * @plen: pointer to length of buffer; updated on return | |
1405 | * @is_write: indicates the transfer direction | |
1406 | */ | |
a8170e5e AK |
1407 | void *address_space_map(AddressSpace *as, hwaddr addr, |
1408 | hwaddr *plen, bool is_write); | |
ac1970fb AK |
1409 | |
1410 | /* address_space_unmap: Unmaps a memory region previously mapped by address_space_map() | |
1411 | * | |
1412 | * Will also mark the memory as dirty if @is_write == %true. @access_len gives | |
1413 | * the amount of memory that was actually read or written by the caller. | |
1414 | * | |
1415 | * @as: #AddressSpace used | |
1416 | * @addr: address within that address space | |
1417 | * @len: buffer length as returned by address_space_map() | |
1418 | * @access_len: amount of data actually transferred | |
1419 | * @is_write: indicates the transfer direction | |
1420 | */ | |
a8170e5e AK |
1421 | void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len, |
1422 | int is_write, hwaddr access_len); | |
ac1970fb AK |
1423 | |
1424 | ||
a203ac70 PB |
1425 | /* Internal functions, part of the implementation of address_space_read. */ |
1426 | MemTxResult address_space_read_continue(AddressSpace *as, hwaddr addr, | |
1427 | MemTxAttrs attrs, uint8_t *buf, | |
1428 | int len, hwaddr addr1, hwaddr l, | |
1429 | MemoryRegion *mr); | |
3cc8f884 PB |
1430 | MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr, |
1431 | MemTxAttrs attrs, uint8_t *buf, int len); | |
0878d0e1 | 1432 | void *qemu_map_ram_ptr(RAMBlock *ram_block, ram_addr_t addr); |
3cc8f884 PB |
1433 | |
1434 | static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write) | |
1435 | { | |
1436 | if (is_write) { | |
1437 | return memory_region_is_ram(mr) && !mr->readonly; | |
1438 | } else { | |
1439 | return memory_region_is_ram(mr) || memory_region_is_romd(mr); | |
1440 | } | |
3cc8f884 PB |
1441 | } |
1442 | ||
1443 | /** | |
1444 | * address_space_read: read from an address space. | |
1445 | * | |
1446 | * Return a MemTxResult indicating whether the operation succeeded | |
1447 | * or failed (eg unassigned memory, device rejected the transaction, | |
1448 | * IOMMU fault). | |
1449 | * | |
1450 | * @as: #AddressSpace to be accessed | |
1451 | * @addr: address within that address space | |
1452 | * @attrs: memory transaction attributes | |
1453 | * @buf: buffer with the data transferred | |
1454 | */ | |
1455 | static inline __attribute__((__always_inline__)) | |
1456 | MemTxResult address_space_read(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, | |
1457 | uint8_t *buf, int len) | |
1458 | { | |
1459 | MemTxResult result = MEMTX_OK; | |
1460 | hwaddr l, addr1; | |
1461 | void *ptr; | |
1462 | MemoryRegion *mr; | |
1463 | ||
1464 | if (__builtin_constant_p(len)) { | |
1465 | if (len) { | |
1466 | rcu_read_lock(); | |
1467 | l = len; | |
1468 | mr = address_space_translate(as, addr, &addr1, &l, false); | |
1469 | if (len == l && memory_access_is_direct(mr, false)) { | |
0878d0e1 | 1470 | ptr = qemu_map_ram_ptr(mr->ram_block, addr1); |
3cc8f884 PB |
1471 | memcpy(buf, ptr, len); |
1472 | } else { | |
1473 | result = address_space_read_continue(as, addr, attrs, buf, len, | |
1474 | addr1, l, mr); | |
1475 | } | |
1476 | rcu_read_unlock(); | |
1477 | } | |
1478 | } else { | |
1479 | result = address_space_read_full(as, addr, attrs, buf, len); | |
1480 | } | |
1481 | return result; | |
1482 | } | |
a203ac70 | 1483 | |
093bc2cd AK |
1484 | #endif |
1485 | ||
1486 | #endif |