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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 | ||
022c62cb | 19 | #include "exec/cpu-common.h" |
ce927ed9 | 20 | #ifndef CONFIG_USER_ONLY |
022c62cb | 21 | #include "exec/hwaddr.h" |
ce927ed9 | 22 | #endif |
cc05c43a | 23 | #include "exec/memattrs.h" |
0987d735 | 24 | #include "exec/ramlist.h" |
1de7afc9 | 25 | #include "qemu/queue.h" |
1de7afc9 | 26 | #include "qemu/int128.h" |
06866575 | 27 | #include "qemu/notify.h" |
b4fefef9 | 28 | #include "qom/object.h" |
374f2981 | 29 | #include "qemu/rcu.h" |
093bc2cd | 30 | |
07bdaa41 PB |
31 | #define RAM_ADDR_INVALID (~(ram_addr_t)0) |
32 | ||
052e87b0 PB |
33 | #define MAX_PHYS_ADDR_SPACE_BITS 62 |
34 | #define MAX_PHYS_ADDR (((hwaddr)1 << MAX_PHYS_ADDR_SPACE_BITS) - 1) | |
35 | ||
b4fefef9 PC |
36 | #define TYPE_MEMORY_REGION "qemu:memory-region" |
37 | #define MEMORY_REGION(obj) \ | |
38 | OBJECT_CHECK(MemoryRegion, (obj), TYPE_MEMORY_REGION) | |
39 | ||
093bc2cd | 40 | typedef struct MemoryRegionOps MemoryRegionOps; |
74901c3b | 41 | typedef struct MemoryRegionMmio MemoryRegionMmio; |
093bc2cd | 42 | |
74901c3b AK |
43 | struct MemoryRegionMmio { |
44 | CPUReadMemoryFunc *read[3]; | |
45 | CPUWriteMemoryFunc *write[3]; | |
46 | }; | |
47 | ||
30951157 AK |
48 | typedef struct IOMMUTLBEntry IOMMUTLBEntry; |
49 | ||
50 | /* See address_space_translate: bit 0 is read, bit 1 is write. */ | |
51 | typedef enum { | |
52 | IOMMU_NONE = 0, | |
53 | IOMMU_RO = 1, | |
54 | IOMMU_WO = 2, | |
55 | IOMMU_RW = 3, | |
56 | } IOMMUAccessFlags; | |
57 | ||
58 | struct IOMMUTLBEntry { | |
59 | AddressSpace *target_as; | |
60 | hwaddr iova; | |
61 | hwaddr translated_addr; | |
62 | hwaddr addr_mask; /* 0xfff = 4k translation */ | |
63 | IOMMUAccessFlags perm; | |
64 | }; | |
65 | ||
cdb30812 PX |
66 | /* |
67 | * Bitmap for different IOMMUNotifier capabilities. Each notifier can | |
68 | * register with one or multiple IOMMU Notifier capability bit(s). | |
69 | */ | |
70 | typedef enum { | |
71 | IOMMU_NOTIFIER_NONE = 0, | |
72 | /* Notify cache invalidations */ | |
73 | IOMMU_NOTIFIER_UNMAP = 0x1, | |
74 | /* Notify entry changes (newly created entries) */ | |
75 | IOMMU_NOTIFIER_MAP = 0x2, | |
76 | } IOMMUNotifierFlag; | |
77 | ||
78 | #define IOMMU_NOTIFIER_ALL (IOMMU_NOTIFIER_MAP | IOMMU_NOTIFIER_UNMAP) | |
79 | ||
80 | struct IOMMUNotifier { | |
81 | void (*notify)(struct IOMMUNotifier *notifier, IOMMUTLBEntry *data); | |
82 | IOMMUNotifierFlag notifier_flags; | |
83 | QLIST_ENTRY(IOMMUNotifier) node; | |
84 | }; | |
85 | typedef struct IOMMUNotifier IOMMUNotifier; | |
86 | ||
cc05c43a PM |
87 | /* New-style MMIO accessors can indicate that the transaction failed. |
88 | * A zero (MEMTX_OK) response means success; anything else is a failure | |
89 | * of some kind. The memory subsystem will bitwise-OR together results | |
90 | * if it is synthesizing an operation from multiple smaller accesses. | |
91 | */ | |
92 | #define MEMTX_OK 0 | |
93 | #define MEMTX_ERROR (1U << 0) /* device returned an error */ | |
94 | #define MEMTX_DECODE_ERROR (1U << 1) /* nothing at that address */ | |
95 | typedef uint32_t MemTxResult; | |
96 | ||
093bc2cd AK |
97 | /* |
98 | * Memory region callbacks | |
99 | */ | |
100 | struct MemoryRegionOps { | |
101 | /* Read from the memory region. @addr is relative to @mr; @size is | |
102 | * in bytes. */ | |
103 | uint64_t (*read)(void *opaque, | |
a8170e5e | 104 | hwaddr addr, |
093bc2cd AK |
105 | unsigned size); |
106 | /* Write to the memory region. @addr is relative to @mr; @size is | |
107 | * in bytes. */ | |
108 | void (*write)(void *opaque, | |
a8170e5e | 109 | hwaddr addr, |
093bc2cd AK |
110 | uint64_t data, |
111 | unsigned size); | |
112 | ||
cc05c43a PM |
113 | MemTxResult (*read_with_attrs)(void *opaque, |
114 | hwaddr addr, | |
115 | uint64_t *data, | |
116 | unsigned size, | |
117 | MemTxAttrs attrs); | |
118 | MemTxResult (*write_with_attrs)(void *opaque, | |
119 | hwaddr addr, | |
120 | uint64_t data, | |
121 | unsigned size, | |
122 | MemTxAttrs attrs); | |
123 | ||
093bc2cd AK |
124 | enum device_endian endianness; |
125 | /* Guest-visible constraints: */ | |
126 | struct { | |
127 | /* If nonzero, specify bounds on access sizes beyond which a machine | |
128 | * check is thrown. | |
129 | */ | |
130 | unsigned min_access_size; | |
131 | unsigned max_access_size; | |
132 | /* If true, unaligned accesses are supported. Otherwise unaligned | |
133 | * accesses throw machine checks. | |
134 | */ | |
135 | bool unaligned; | |
897fa7cf AK |
136 | /* |
137 | * If present, and returns #false, the transaction is not accepted | |
138 | * by the device (and results in machine dependent behaviour such | |
139 | * as a machine check exception). | |
140 | */ | |
a8170e5e | 141 | bool (*accepts)(void *opaque, hwaddr addr, |
897fa7cf | 142 | unsigned size, bool is_write); |
093bc2cd AK |
143 | } valid; |
144 | /* Internal implementation constraints: */ | |
145 | struct { | |
146 | /* If nonzero, specifies the minimum size implemented. Smaller sizes | |
147 | * will be rounded upwards and a partial result will be returned. | |
148 | */ | |
149 | unsigned min_access_size; | |
150 | /* If nonzero, specifies the maximum size implemented. Larger sizes | |
151 | * will be done as a series of accesses with smaller sizes. | |
152 | */ | |
153 | unsigned max_access_size; | |
154 | /* If true, unaligned accesses are supported. Otherwise all accesses | |
155 | * are converted to (possibly multiple) naturally aligned accesses. | |
156 | */ | |
edc1ba7a | 157 | bool unaligned; |
093bc2cd | 158 | } impl; |
627a0e90 | 159 | |
74901c3b AK |
160 | /* If .read and .write are not present, old_mmio may be used for |
161 | * backwards compatibility with old mmio registration | |
162 | */ | |
163 | const MemoryRegionMmio old_mmio; | |
093bc2cd AK |
164 | }; |
165 | ||
30951157 AK |
166 | typedef struct MemoryRegionIOMMUOps MemoryRegionIOMMUOps; |
167 | ||
168 | struct MemoryRegionIOMMUOps { | |
169 | /* Return a TLB entry that contains a given address. */ | |
8d7b8cb9 | 170 | IOMMUTLBEntry (*translate)(MemoryRegion *iommu, hwaddr addr, bool is_write); |
f682e9c2 AK |
171 | /* Returns minimum supported page size */ |
172 | uint64_t (*get_min_page_size)(MemoryRegion *iommu); | |
5bf3d319 PX |
173 | /* Called when IOMMU Notifier flag changed */ |
174 | void (*notify_flag_changed)(MemoryRegion *iommu, | |
175 | IOMMUNotifierFlag old_flags, | |
176 | IOMMUNotifierFlag new_flags); | |
30951157 AK |
177 | }; |
178 | ||
093bc2cd | 179 | typedef struct CoalescedMemoryRange CoalescedMemoryRange; |
3e9d69e7 | 180 | typedef struct MemoryRegionIoeventfd MemoryRegionIoeventfd; |
093bc2cd AK |
181 | |
182 | struct MemoryRegion { | |
b4fefef9 | 183 | Object parent_obj; |
a676854f | 184 | |
093bc2cd | 185 | /* All fields are private - violators will be prosecuted */ |
a676854f PB |
186 | |
187 | /* The following fields should fit in a cache line */ | |
188 | bool romd_mode; | |
189 | bool ram; | |
190 | bool subpage; | |
191 | bool readonly; /* For RAM regions */ | |
192 | bool rom_device; | |
193 | bool flush_coalesced_mmio; | |
194 | bool global_locking; | |
195 | uint8_t dirty_log_mask; | |
58eaa217 | 196 | RAMBlock *ram_block; |
612263cf | 197 | Object *owner; |
30951157 | 198 | const MemoryRegionIOMMUOps *iommu_ops; |
a676854f PB |
199 | |
200 | const MemoryRegionOps *ops; | |
093bc2cd | 201 | void *opaque; |
feca4ac1 | 202 | MemoryRegion *container; |
08dafab4 | 203 | Int128 size; |
a8170e5e | 204 | hwaddr addr; |
545e92e0 | 205 | void (*destructor)(MemoryRegion *mr); |
a2b257d6 | 206 | uint64_t align; |
14a3c10a | 207 | bool terminates; |
21e00fa5 | 208 | bool ram_device; |
6bba19ba | 209 | bool enabled; |
1660e72d | 210 | bool warning_printed; /* For reservations */ |
deb809ed | 211 | uint8_t vga_logging_count; |
093bc2cd | 212 | MemoryRegion *alias; |
a8170e5e | 213 | hwaddr alias_offset; |
d33382da | 214 | int32_t priority; |
093bc2cd AK |
215 | QTAILQ_HEAD(subregions, MemoryRegion) subregions; |
216 | QTAILQ_ENTRY(MemoryRegion) subregions_link; | |
217 | QTAILQ_HEAD(coalesced_ranges, CoalescedMemoryRange) coalesced; | |
302fa283 | 218 | const char *name; |
3e9d69e7 AK |
219 | unsigned ioeventfd_nb; |
220 | MemoryRegionIoeventfd *ioeventfds; | |
cdb30812 | 221 | QLIST_HEAD(, IOMMUNotifier) iommu_notify; |
5bf3d319 | 222 | IOMMUNotifierFlag iommu_notify_flags; |
093bc2cd AK |
223 | }; |
224 | ||
c2fc83e8 PB |
225 | /** |
226 | * MemoryListener: callbacks structure for updates to the physical memory map | |
227 | * | |
228 | * Allows a component to adjust to changes in the guest-visible memory map. | |
229 | * Use with memory_listener_register() and memory_listener_unregister(). | |
230 | */ | |
231 | struct MemoryListener { | |
232 | void (*begin)(MemoryListener *listener); | |
233 | void (*commit)(MemoryListener *listener); | |
234 | void (*region_add)(MemoryListener *listener, MemoryRegionSection *section); | |
235 | void (*region_del)(MemoryListener *listener, MemoryRegionSection *section); | |
236 | void (*region_nop)(MemoryListener *listener, MemoryRegionSection *section); | |
b2dfd71c PB |
237 | void (*log_start)(MemoryListener *listener, MemoryRegionSection *section, |
238 | int old, int new); | |
239 | void (*log_stop)(MemoryListener *listener, MemoryRegionSection *section, | |
240 | int old, int new); | |
c2fc83e8 PB |
241 | void (*log_sync)(MemoryListener *listener, MemoryRegionSection *section); |
242 | void (*log_global_start)(MemoryListener *listener); | |
243 | void (*log_global_stop)(MemoryListener *listener); | |
244 | void (*eventfd_add)(MemoryListener *listener, MemoryRegionSection *section, | |
245 | bool match_data, uint64_t data, EventNotifier *e); | |
246 | void (*eventfd_del)(MemoryListener *listener, MemoryRegionSection *section, | |
247 | bool match_data, uint64_t data, EventNotifier *e); | |
248 | void (*coalesced_mmio_add)(MemoryListener *listener, MemoryRegionSection *section, | |
249 | hwaddr addr, hwaddr len); | |
250 | void (*coalesced_mmio_del)(MemoryListener *listener, MemoryRegionSection *section, | |
251 | hwaddr addr, hwaddr len); | |
252 | /* Lower = earlier (during add), later (during del) */ | |
253 | unsigned priority; | |
d45fa784 | 254 | AddressSpace *address_space; |
c2fc83e8 | 255 | QTAILQ_ENTRY(MemoryListener) link; |
9a54635d | 256 | QTAILQ_ENTRY(MemoryListener) link_as; |
c2fc83e8 PB |
257 | }; |
258 | ||
9ad2bbc1 AK |
259 | /** |
260 | * AddressSpace: describes a mapping of addresses to #MemoryRegion objects | |
261 | */ | |
262 | struct AddressSpace { | |
263 | /* All fields are private. */ | |
374f2981 | 264 | struct rcu_head rcu; |
7dca8043 | 265 | char *name; |
9ad2bbc1 | 266 | MemoryRegion *root; |
f0c02d15 PC |
267 | int ref_count; |
268 | bool malloced; | |
374f2981 PB |
269 | |
270 | /* Accessed via RCU. */ | |
9ad2bbc1 | 271 | struct FlatView *current_map; |
374f2981 | 272 | |
9ad2bbc1 AK |
273 | int ioeventfd_nb; |
274 | struct MemoryRegionIoeventfd *ioeventfds; | |
ac1970fb | 275 | struct AddressSpaceDispatch *dispatch; |
00752703 | 276 | struct AddressSpaceDispatch *next_dispatch; |
89ae337a | 277 | MemoryListener dispatch_listener; |
9a54635d | 278 | QTAILQ_HEAD(memory_listeners_as, MemoryListener) listeners; |
0d673e36 | 279 | QTAILQ_ENTRY(AddressSpace) address_spaces_link; |
9ad2bbc1 AK |
280 | }; |
281 | ||
e2177955 AK |
282 | /** |
283 | * MemoryRegionSection: describes a fragment of a #MemoryRegion | |
284 | * | |
285 | * @mr: the region, or %NULL if empty | |
7664e80c | 286 | * @address_space: the address space the region is mapped in |
e2177955 AK |
287 | * @offset_within_region: the beginning of the section, relative to @mr's start |
288 | * @size: the size of the section; will not exceed @mr's boundaries | |
289 | * @offset_within_address_space: the address of the first byte of the section | |
290 | * relative to the region's address space | |
7a8499e8 | 291 | * @readonly: writes to this section are ignored |
e2177955 AK |
292 | */ |
293 | struct MemoryRegionSection { | |
294 | MemoryRegion *mr; | |
f6790af6 | 295 | AddressSpace *address_space; |
a8170e5e | 296 | hwaddr offset_within_region; |
052e87b0 | 297 | Int128 size; |
a8170e5e | 298 | hwaddr offset_within_address_space; |
7a8499e8 | 299 | bool readonly; |
e2177955 AK |
300 | }; |
301 | ||
093bc2cd AK |
302 | /** |
303 | * memory_region_init: Initialize a memory region | |
304 | * | |
69ddaf66 | 305 | * The region typically acts as a container for other memory regions. Use |
093bc2cd AK |
306 | * memory_region_add_subregion() to add subregions. |
307 | * | |
308 | * @mr: the #MemoryRegion to be initialized | |
2c9b15ca | 309 | * @owner: the object that tracks the region's reference count |
093bc2cd AK |
310 | * @name: used for debugging; not visible to the user or ABI |
311 | * @size: size of the region; any subregions beyond this size will be clipped | |
312 | */ | |
313 | void memory_region_init(MemoryRegion *mr, | |
2c9b15ca | 314 | struct Object *owner, |
093bc2cd AK |
315 | const char *name, |
316 | uint64_t size); | |
46637be2 PB |
317 | |
318 | /** | |
319 | * memory_region_ref: Add 1 to a memory region's reference count | |
320 | * | |
321 | * Whenever memory regions are accessed outside the BQL, they need to be | |
322 | * preserved against hot-unplug. MemoryRegions actually do not have their | |
323 | * own reference count; they piggyback on a QOM object, their "owner". | |
324 | * This function adds a reference to the owner. | |
325 | * | |
326 | * All MemoryRegions must have an owner if they can disappear, even if the | |
327 | * device they belong to operates exclusively under the BQL. This is because | |
328 | * the region could be returned at any time by memory_region_find, and this | |
329 | * is usually under guest control. | |
330 | * | |
331 | * @mr: the #MemoryRegion | |
332 | */ | |
333 | void memory_region_ref(MemoryRegion *mr); | |
334 | ||
335 | /** | |
336 | * memory_region_unref: Remove 1 to a memory region's reference count | |
337 | * | |
338 | * Whenever memory regions are accessed outside the BQL, they need to be | |
339 | * preserved against hot-unplug. MemoryRegions actually do not have their | |
340 | * own reference count; they piggyback on a QOM object, their "owner". | |
341 | * This function removes a reference to the owner and possibly destroys it. | |
342 | * | |
343 | * @mr: the #MemoryRegion | |
344 | */ | |
345 | void memory_region_unref(MemoryRegion *mr); | |
346 | ||
093bc2cd AK |
347 | /** |
348 | * memory_region_init_io: Initialize an I/O memory region. | |
349 | * | |
69ddaf66 | 350 | * Accesses into the region will cause the callbacks in @ops to be called. |
093bc2cd AK |
351 | * if @size is nonzero, subregions will be clipped to @size. |
352 | * | |
353 | * @mr: the #MemoryRegion to be initialized. | |
2c9b15ca | 354 | * @owner: the object that tracks the region's reference count |
093bc2cd AK |
355 | * @ops: a structure containing read and write callbacks to be used when |
356 | * I/O is performed on the region. | |
b6af0975 | 357 | * @opaque: passed to the read and write callbacks of the @ops structure. |
093bc2cd AK |
358 | * @name: used for debugging; not visible to the user or ABI |
359 | * @size: size of the region. | |
360 | */ | |
361 | void memory_region_init_io(MemoryRegion *mr, | |
2c9b15ca | 362 | struct Object *owner, |
093bc2cd AK |
363 | const MemoryRegionOps *ops, |
364 | void *opaque, | |
365 | const char *name, | |
366 | uint64_t size); | |
367 | ||
368 | /** | |
369 | * memory_region_init_ram: Initialize RAM memory region. Accesses into the | |
69ddaf66 | 370 | * region will modify memory directly. |
093bc2cd AK |
371 | * |
372 | * @mr: the #MemoryRegion to be initialized. | |
2c9b15ca | 373 | * @owner: the object that tracks the region's reference count |
e8f5fe2d DDAG |
374 | * @name: Region name, becomes part of RAMBlock name used in migration stream |
375 | * must be unique within any device | |
093bc2cd | 376 | * @size: size of the region. |
49946538 | 377 | * @errp: pointer to Error*, to store an error if it happens. |
093bc2cd AK |
378 | */ |
379 | void memory_region_init_ram(MemoryRegion *mr, | |
2c9b15ca | 380 | struct Object *owner, |
093bc2cd | 381 | const char *name, |
49946538 HT |
382 | uint64_t size, |
383 | Error **errp); | |
093bc2cd | 384 | |
60786ef3 MT |
385 | /** |
386 | * memory_region_init_resizeable_ram: Initialize memory region with resizeable | |
387 | * RAM. Accesses into the region will | |
388 | * modify memory directly. Only an initial | |
389 | * portion of this RAM is actually used. | |
390 | * The used size can change across reboots. | |
391 | * | |
392 | * @mr: the #MemoryRegion to be initialized. | |
393 | * @owner: the object that tracks the region's reference count | |
e8f5fe2d DDAG |
394 | * @name: Region name, becomes part of RAMBlock name used in migration stream |
395 | * must be unique within any device | |
60786ef3 MT |
396 | * @size: used size of the region. |
397 | * @max_size: max size of the region. | |
398 | * @resized: callback to notify owner about used size change. | |
399 | * @errp: pointer to Error*, to store an error if it happens. | |
400 | */ | |
401 | void memory_region_init_resizeable_ram(MemoryRegion *mr, | |
402 | struct Object *owner, | |
403 | const char *name, | |
404 | uint64_t size, | |
405 | uint64_t max_size, | |
406 | void (*resized)(const char*, | |
407 | uint64_t length, | |
408 | void *host), | |
409 | Error **errp); | |
0b183fc8 PB |
410 | #ifdef __linux__ |
411 | /** | |
412 | * memory_region_init_ram_from_file: Initialize RAM memory region with a | |
413 | * mmap-ed backend. | |
414 | * | |
415 | * @mr: the #MemoryRegion to be initialized. | |
416 | * @owner: the object that tracks the region's reference count | |
e8f5fe2d DDAG |
417 | * @name: Region name, becomes part of RAMBlock name used in migration stream |
418 | * must be unique within any device | |
0b183fc8 | 419 | * @size: size of the region. |
dbcb8981 | 420 | * @share: %true if memory must be mmaped with the MAP_SHARED flag |
0b183fc8 | 421 | * @path: the path in which to allocate the RAM. |
7f56e740 | 422 | * @errp: pointer to Error*, to store an error if it happens. |
0b183fc8 PB |
423 | */ |
424 | void memory_region_init_ram_from_file(MemoryRegion *mr, | |
425 | struct Object *owner, | |
426 | const char *name, | |
427 | uint64_t size, | |
dbcb8981 | 428 | bool share, |
7f56e740 PB |
429 | const char *path, |
430 | Error **errp); | |
0b183fc8 PB |
431 | #endif |
432 | ||
093bc2cd | 433 | /** |
1a7e8cae BZ |
434 | * memory_region_init_ram_ptr: Initialize RAM memory region from a |
435 | * user-provided pointer. Accesses into the | |
436 | * region will modify memory directly. | |
093bc2cd AK |
437 | * |
438 | * @mr: the #MemoryRegion to be initialized. | |
2c9b15ca | 439 | * @owner: the object that tracks the region's reference count |
e8f5fe2d DDAG |
440 | * @name: Region name, becomes part of RAMBlock name used in migration stream |
441 | * must be unique within any device | |
093bc2cd AK |
442 | * @size: size of the region. |
443 | * @ptr: memory to be mapped; must contain at least @size bytes. | |
444 | */ | |
445 | void memory_region_init_ram_ptr(MemoryRegion *mr, | |
2c9b15ca | 446 | struct Object *owner, |
093bc2cd AK |
447 | const char *name, |
448 | uint64_t size, | |
449 | void *ptr); | |
450 | ||
21e00fa5 AW |
451 | /** |
452 | * memory_region_init_ram_device_ptr: Initialize RAM device memory region from | |
453 | * a user-provided pointer. | |
454 | * | |
455 | * A RAM device represents a mapping to a physical device, such as to a PCI | |
456 | * MMIO BAR of an vfio-pci assigned device. The memory region may be mapped | |
457 | * into the VM address space and access to the region will modify memory | |
458 | * directly. However, the memory region should not be included in a memory | |
459 | * dump (device may not be enabled/mapped at the time of the dump), and | |
460 | * operations incompatible with manipulating MMIO should be avoided. Replaces | |
461 | * skip_dump flag. | |
462 | * | |
463 | * @mr: the #MemoryRegion to be initialized. | |
464 | * @owner: the object that tracks the region's reference count | |
465 | * @name: the name of the region. | |
466 | * @size: size of the region. | |
467 | * @ptr: memory to be mapped; must contain at least @size bytes. | |
468 | */ | |
469 | void memory_region_init_ram_device_ptr(MemoryRegion *mr, | |
470 | struct Object *owner, | |
471 | const char *name, | |
472 | uint64_t size, | |
473 | void *ptr); | |
474 | ||
093bc2cd AK |
475 | /** |
476 | * memory_region_init_alias: Initialize a memory region that aliases all or a | |
477 | * part of another memory region. | |
478 | * | |
479 | * @mr: the #MemoryRegion to be initialized. | |
2c9b15ca | 480 | * @owner: the object that tracks the region's reference count |
093bc2cd AK |
481 | * @name: used for debugging; not visible to the user or ABI |
482 | * @orig: the region to be referenced; @mr will be equivalent to | |
483 | * @orig between @offset and @offset + @size - 1. | |
484 | * @offset: start of the section in @orig to be referenced. | |
485 | * @size: size of the region. | |
486 | */ | |
487 | void memory_region_init_alias(MemoryRegion *mr, | |
2c9b15ca | 488 | struct Object *owner, |
093bc2cd AK |
489 | const char *name, |
490 | MemoryRegion *orig, | |
a8170e5e | 491 | hwaddr offset, |
093bc2cd | 492 | uint64_t size); |
d0a9b5bc | 493 | |
a1777f7f PM |
494 | /** |
495 | * memory_region_init_rom: Initialize a ROM memory region. | |
496 | * | |
497 | * This has the same effect as calling memory_region_init_ram() | |
498 | * and then marking the resulting region read-only with | |
499 | * memory_region_set_readonly(). | |
500 | * | |
501 | * @mr: the #MemoryRegion to be initialized. | |
502 | * @owner: the object that tracks the region's reference count | |
e8f5fe2d DDAG |
503 | * @name: Region name, becomes part of RAMBlock name used in migration stream |
504 | * must be unique within any device | |
a1777f7f PM |
505 | * @size: size of the region. |
506 | * @errp: pointer to Error*, to store an error if it happens. | |
507 | */ | |
508 | void memory_region_init_rom(MemoryRegion *mr, | |
509 | struct Object *owner, | |
510 | const char *name, | |
511 | uint64_t size, | |
512 | Error **errp); | |
513 | ||
d0a9b5bc AK |
514 | /** |
515 | * memory_region_init_rom_device: Initialize a ROM memory region. Writes are | |
516 | * handled via callbacks. | |
517 | * | |
518 | * @mr: the #MemoryRegion to be initialized. | |
2c9b15ca | 519 | * @owner: the object that tracks the region's reference count |
39e0b03d | 520 | * @ops: callbacks for write access handling (must not be NULL). |
e8f5fe2d DDAG |
521 | * @name: Region name, becomes part of RAMBlock name used in migration stream |
522 | * must be unique within any device | |
d0a9b5bc | 523 | * @size: size of the region. |
33e0eb52 | 524 | * @errp: pointer to Error*, to store an error if it happens. |
d0a9b5bc AK |
525 | */ |
526 | void memory_region_init_rom_device(MemoryRegion *mr, | |
2c9b15ca | 527 | struct Object *owner, |
d0a9b5bc | 528 | const MemoryRegionOps *ops, |
75f5941c | 529 | void *opaque, |
d0a9b5bc | 530 | const char *name, |
33e0eb52 HT |
531 | uint64_t size, |
532 | Error **errp); | |
d0a9b5bc | 533 | |
1660e72d JK |
534 | /** |
535 | * memory_region_init_reservation: Initialize a memory region that reserves | |
536 | * I/O space. | |
537 | * | |
538 | * A reservation region primariy serves debugging purposes. It claims I/O | |
539 | * space that is not supposed to be handled by QEMU itself. Any access via | |
540 | * the memory API will cause an abort(). | |
6d6d2abf PF |
541 | * This function is deprecated. Use memory_region_init_io() with NULL |
542 | * callbacks instead. | |
1660e72d JK |
543 | * |
544 | * @mr: the #MemoryRegion to be initialized | |
2c9b15ca | 545 | * @owner: the object that tracks the region's reference count |
1660e72d JK |
546 | * @name: used for debugging; not visible to the user or ABI |
547 | * @size: size of the region. | |
548 | */ | |
6d6d2abf PF |
549 | static inline void memory_region_init_reservation(MemoryRegion *mr, |
550 | Object *owner, | |
1660e72d | 551 | const char *name, |
6d6d2abf PF |
552 | uint64_t size) |
553 | { | |
554 | memory_region_init_io(mr, owner, NULL, mr, name, size); | |
555 | } | |
30951157 AK |
556 | |
557 | /** | |
558 | * memory_region_init_iommu: Initialize a memory region that translates | |
559 | * addresses | |
560 | * | |
561 | * An IOMMU region translates addresses and forwards accesses to a target | |
562 | * memory region. | |
563 | * | |
564 | * @mr: the #MemoryRegion to be initialized | |
2c9b15ca | 565 | * @owner: the object that tracks the region's reference count |
30951157 AK |
566 | * @ops: a function that translates addresses into the @target region |
567 | * @name: used for debugging; not visible to the user or ABI | |
568 | * @size: size of the region. | |
569 | */ | |
570 | void memory_region_init_iommu(MemoryRegion *mr, | |
2c9b15ca | 571 | struct Object *owner, |
30951157 AK |
572 | const MemoryRegionIOMMUOps *ops, |
573 | const char *name, | |
574 | uint64_t size); | |
575 | ||
803c0816 PB |
576 | /** |
577 | * memory_region_owner: get a memory region's owner. | |
578 | * | |
579 | * @mr: the memory region being queried. | |
580 | */ | |
581 | struct Object *memory_region_owner(MemoryRegion *mr); | |
582 | ||
093bc2cd AK |
583 | /** |
584 | * memory_region_size: get a memory region's size. | |
585 | * | |
586 | * @mr: the memory region being queried. | |
587 | */ | |
588 | uint64_t memory_region_size(MemoryRegion *mr); | |
589 | ||
8ea9252a AK |
590 | /** |
591 | * memory_region_is_ram: check whether a memory region is random access | |
592 | * | |
593 | * Returns %true is a memory region is random access. | |
594 | * | |
595 | * @mr: the memory region being queried | |
596 | */ | |
1619d1fe PB |
597 | static inline bool memory_region_is_ram(MemoryRegion *mr) |
598 | { | |
599 | return mr->ram; | |
600 | } | |
8ea9252a | 601 | |
e4dc3f59 | 602 | /** |
21e00fa5 | 603 | * memory_region_is_ram_device: check whether a memory region is a ram device |
e4dc3f59 | 604 | * |
21e00fa5 | 605 | * Returns %true is a memory region is a device backed ram region |
e4dc3f59 ND |
606 | * |
607 | * @mr: the memory region being queried | |
608 | */ | |
21e00fa5 | 609 | bool memory_region_is_ram_device(MemoryRegion *mr); |
e4dc3f59 | 610 | |
fd062573 | 611 | /** |
5f9a5ea1 | 612 | * memory_region_is_romd: check whether a memory region is in ROMD mode |
fd062573 | 613 | * |
5f9a5ea1 | 614 | * Returns %true if a memory region is a ROM device and currently set to allow |
fd062573 BS |
615 | * direct reads. |
616 | * | |
617 | * @mr: the memory region being queried | |
618 | */ | |
619 | static inline bool memory_region_is_romd(MemoryRegion *mr) | |
620 | { | |
5f9a5ea1 | 621 | return mr->rom_device && mr->romd_mode; |
fd062573 BS |
622 | } |
623 | ||
30951157 AK |
624 | /** |
625 | * memory_region_is_iommu: check whether a memory region is an iommu | |
626 | * | |
627 | * Returns %true is a memory region is an iommu. | |
628 | * | |
629 | * @mr: the memory region being queried | |
630 | */ | |
1619d1fe PB |
631 | static inline bool memory_region_is_iommu(MemoryRegion *mr) |
632 | { | |
12d37882 JW |
633 | if (mr->alias) { |
634 | return memory_region_is_iommu(mr->alias); | |
635 | } | |
1619d1fe PB |
636 | return mr->iommu_ops; |
637 | } | |
638 | ||
30951157 | 639 | |
f682e9c2 AK |
640 | /** |
641 | * memory_region_iommu_get_min_page_size: get minimum supported page size | |
642 | * for an iommu | |
643 | * | |
644 | * Returns minimum supported page size for an iommu. | |
645 | * | |
646 | * @mr: the memory region being queried | |
647 | */ | |
648 | uint64_t memory_region_iommu_get_min_page_size(MemoryRegion *mr); | |
649 | ||
06866575 DG |
650 | /** |
651 | * memory_region_notify_iommu: notify a change in an IOMMU translation entry. | |
652 | * | |
cdb30812 PX |
653 | * The notification type will be decided by entry.perm bits: |
654 | * | |
655 | * - For UNMAP (cache invalidation) notifies: set entry.perm to IOMMU_NONE. | |
656 | * - For MAP (newly added entry) notifies: set entry.perm to the | |
657 | * permission of the page (which is definitely !IOMMU_NONE). | |
658 | * | |
659 | * Note: for any IOMMU implementation, an in-place mapping change | |
660 | * should be notified with an UNMAP followed by a MAP. | |
661 | * | |
06866575 DG |
662 | * @mr: the memory region that was changed |
663 | * @entry: the new entry in the IOMMU translation table. The entry | |
664 | * replaces all old entries for the same virtual I/O address range. | |
665 | * Deleted entries have .@perm == 0. | |
666 | */ | |
667 | void memory_region_notify_iommu(MemoryRegion *mr, | |
668 | IOMMUTLBEntry entry); | |
669 | ||
670 | /** | |
671 | * memory_region_register_iommu_notifier: register a notifier for changes to | |
672 | * IOMMU translation entries. | |
673 | * | |
674 | * @mr: the memory region to observe | |
cdb30812 PX |
675 | * @n: the IOMMUNotifier to be added; the notify callback receives a |
676 | * pointer to an #IOMMUTLBEntry as the opaque value; the pointer | |
677 | * ceases to be valid on exit from the notifier. | |
06866575 | 678 | */ |
cdb30812 PX |
679 | void memory_region_register_iommu_notifier(MemoryRegion *mr, |
680 | IOMMUNotifier *n); | |
06866575 | 681 | |
a788f227 DG |
682 | /** |
683 | * memory_region_iommu_replay: replay existing IOMMU translations to | |
f682e9c2 AK |
684 | * a notifier with the minimum page granularity returned by |
685 | * mr->iommu_ops->get_page_size(). | |
a788f227 DG |
686 | * |
687 | * @mr: the memory region to observe | |
688 | * @n: the notifier to which to replay iommu mappings | |
a788f227 DG |
689 | * @is_write: Whether to treat the replay as a translate "write" |
690 | * through the iommu | |
691 | */ | |
cdb30812 PX |
692 | void memory_region_iommu_replay(MemoryRegion *mr, IOMMUNotifier *n, |
693 | bool is_write); | |
a788f227 | 694 | |
06866575 DG |
695 | /** |
696 | * memory_region_unregister_iommu_notifier: unregister a notifier for | |
697 | * changes to IOMMU translation entries. | |
698 | * | |
d22d8956 AK |
699 | * @mr: the memory region which was observed and for which notity_stopped() |
700 | * needs to be called | |
06866575 DG |
701 | * @n: the notifier to be removed. |
702 | */ | |
cdb30812 PX |
703 | void memory_region_unregister_iommu_notifier(MemoryRegion *mr, |
704 | IOMMUNotifier *n); | |
06866575 | 705 | |
8991c79b AK |
706 | /** |
707 | * memory_region_name: get a memory region's name | |
708 | * | |
709 | * Returns the string that was used to initialize the memory region. | |
710 | * | |
711 | * @mr: the memory region being queried | |
712 | */ | |
5d546d4b | 713 | const char *memory_region_name(const MemoryRegion *mr); |
8991c79b | 714 | |
55043ba3 AK |
715 | /** |
716 | * memory_region_is_logging: return whether a memory region is logging writes | |
717 | * | |
2d1a35be | 718 | * Returns %true if the memory region is logging writes for the given client |
55043ba3 AK |
719 | * |
720 | * @mr: the memory region being queried | |
2d1a35be | 721 | * @client: the client being queried |
55043ba3 | 722 | */ |
2d1a35be PB |
723 | bool memory_region_is_logging(MemoryRegion *mr, uint8_t client); |
724 | ||
725 | /** | |
726 | * memory_region_get_dirty_log_mask: return the clients for which a | |
727 | * memory region is logging writes. | |
728 | * | |
677e7805 PB |
729 | * Returns a bitmap of clients, in which the DIRTY_MEMORY_* constants |
730 | * are the bit indices. | |
2d1a35be PB |
731 | * |
732 | * @mr: the memory region being queried | |
733 | */ | |
734 | uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr); | |
55043ba3 | 735 | |
ce7923da AK |
736 | /** |
737 | * memory_region_is_rom: check whether a memory region is ROM | |
738 | * | |
739 | * Returns %true is a memory region is read-only memory. | |
740 | * | |
741 | * @mr: the memory region being queried | |
742 | */ | |
1619d1fe PB |
743 | static inline bool memory_region_is_rom(MemoryRegion *mr) |
744 | { | |
745 | return mr->ram && mr->readonly; | |
746 | } | |
747 | ||
ce7923da | 748 | |
a35ba7be PB |
749 | /** |
750 | * memory_region_get_fd: Get a file descriptor backing a RAM memory region. | |
751 | * | |
752 | * Returns a file descriptor backing a file-based RAM memory region, | |
753 | * or -1 if the region is not a file-based RAM memory region. | |
754 | * | |
755 | * @mr: the RAM or alias memory region being queried. | |
756 | */ | |
757 | int memory_region_get_fd(MemoryRegion *mr); | |
758 | ||
4ff87573 PB |
759 | /** |
760 | * memory_region_set_fd: Mark a RAM memory region as backed by a | |
761 | * file descriptor. | |
762 | * | |
763 | * This function is typically used after memory_region_init_ram_ptr(). | |
764 | * | |
765 | * @mr: the memory region being queried. | |
766 | * @fd: the file descriptor that backs @mr. | |
767 | */ | |
768 | void memory_region_set_fd(MemoryRegion *mr, int fd); | |
769 | ||
07bdaa41 PB |
770 | /** |
771 | * memory_region_from_host: Convert a pointer into a RAM memory region | |
772 | * and an offset within it. | |
773 | * | |
774 | * Given a host pointer inside a RAM memory region (created with | |
775 | * memory_region_init_ram() or memory_region_init_ram_ptr()), return | |
776 | * the MemoryRegion and the offset within it. | |
777 | * | |
778 | * Use with care; by the time this function returns, the returned pointer is | |
779 | * not protected by RCU anymore. If the caller is not within an RCU critical | |
780 | * section and does not hold the iothread lock, it must have other means of | |
781 | * protecting the pointer, such as a reference to the region that includes | |
782 | * the incoming ram_addr_t. | |
783 | * | |
784 | * @mr: the memory region being queried. | |
785 | */ | |
786 | MemoryRegion *memory_region_from_host(void *ptr, ram_addr_t *offset); | |
787 | ||
093bc2cd AK |
788 | /** |
789 | * memory_region_get_ram_ptr: Get a pointer into a RAM memory region. | |
790 | * | |
791 | * Returns a host pointer to a RAM memory region (created with | |
49b24afc PB |
792 | * memory_region_init_ram() or memory_region_init_ram_ptr()). |
793 | * | |
794 | * Use with care; by the time this function returns, the returned pointer is | |
795 | * not protected by RCU anymore. If the caller is not within an RCU critical | |
796 | * section and does not hold the iothread lock, it must have other means of | |
797 | * protecting the pointer, such as a reference to the region that includes | |
798 | * the incoming ram_addr_t. | |
093bc2cd AK |
799 | * |
800 | * @mr: the memory region being queried. | |
801 | */ | |
802 | void *memory_region_get_ram_ptr(MemoryRegion *mr); | |
803 | ||
37d7c084 PB |
804 | /* memory_region_ram_resize: Resize a RAM region. |
805 | * | |
806 | * Only legal before guest might have detected the memory size: e.g. on | |
807 | * incoming migration, or right after reset. | |
808 | * | |
809 | * @mr: a memory region created with @memory_region_init_resizeable_ram. | |
810 | * @newsize: the new size the region | |
811 | * @errp: pointer to Error*, to store an error if it happens. | |
812 | */ | |
813 | void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, | |
814 | Error **errp); | |
815 | ||
093bc2cd AK |
816 | /** |
817 | * memory_region_set_log: Turn dirty logging on or off for a region. | |
818 | * | |
819 | * Turns dirty logging on or off for a specified client (display, migration). | |
820 | * Only meaningful for RAM regions. | |
821 | * | |
822 | * @mr: the memory region being updated. | |
823 | * @log: whether dirty logging is to be enabled or disabled. | |
dbddac6d | 824 | * @client: the user of the logging information; %DIRTY_MEMORY_VGA only. |
093bc2cd AK |
825 | */ |
826 | void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client); | |
827 | ||
828 | /** | |
cd7a45c9 BS |
829 | * memory_region_get_dirty: Check whether a range of bytes is dirty |
830 | * for a specified client. | |
093bc2cd | 831 | * |
cd7a45c9 | 832 | * Checks whether a range of bytes has been written to since the last |
093bc2cd AK |
833 | * call to memory_region_reset_dirty() with the same @client. Dirty logging |
834 | * must be enabled. | |
835 | * | |
836 | * @mr: the memory region being queried. | |
837 | * @addr: the address (relative to the start of the region) being queried. | |
cd7a45c9 | 838 | * @size: the size of the range being queried. |
093bc2cd AK |
839 | * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or |
840 | * %DIRTY_MEMORY_VGA. | |
841 | */ | |
a8170e5e AK |
842 | bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr, |
843 | hwaddr size, unsigned client); | |
093bc2cd AK |
844 | |
845 | /** | |
fd4aa979 | 846 | * memory_region_set_dirty: Mark a range of bytes as dirty in a memory region. |
093bc2cd | 847 | * |
fd4aa979 BS |
848 | * Marks a range of bytes as dirty, after it has been dirtied outside |
849 | * guest code. | |
093bc2cd | 850 | * |
fd4aa979 | 851 | * @mr: the memory region being dirtied. |
093bc2cd | 852 | * @addr: the address (relative to the start of the region) being dirtied. |
fd4aa979 | 853 | * @size: size of the range being dirtied. |
093bc2cd | 854 | */ |
a8170e5e AK |
855 | void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr, |
856 | hwaddr size); | |
093bc2cd | 857 | |
6c279db8 JQ |
858 | /** |
859 | * memory_region_test_and_clear_dirty: Check whether a range of bytes is dirty | |
860 | * for a specified client. It clears them. | |
861 | * | |
862 | * Checks whether a range of bytes has been written to since the last | |
863 | * call to memory_region_reset_dirty() with the same @client. Dirty logging | |
864 | * must be enabled. | |
865 | * | |
866 | * @mr: the memory region being queried. | |
867 | * @addr: the address (relative to the start of the region) being queried. | |
868 | * @size: the size of the range being queried. | |
869 | * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or | |
870 | * %DIRTY_MEMORY_VGA. | |
871 | */ | |
872 | bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr, | |
873 | hwaddr size, unsigned client); | |
093bc2cd AK |
874 | /** |
875 | * memory_region_sync_dirty_bitmap: Synchronize a region's dirty bitmap with | |
876 | * any external TLBs (e.g. kvm) | |
877 | * | |
878 | * Flushes dirty information from accelerators such as kvm and vhost-net | |
879 | * and makes it available to users of the memory API. | |
880 | * | |
881 | * @mr: the region being flushed. | |
882 | */ | |
883 | void memory_region_sync_dirty_bitmap(MemoryRegion *mr); | |
884 | ||
885 | /** | |
886 | * memory_region_reset_dirty: Mark a range of pages as clean, for a specified | |
887 | * client. | |
888 | * | |
889 | * Marks a range of pages as no longer dirty. | |
890 | * | |
891 | * @mr: the region being updated. | |
892 | * @addr: the start of the subrange being cleaned. | |
893 | * @size: the size of the subrange being cleaned. | |
894 | * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or | |
895 | * %DIRTY_MEMORY_VGA. | |
896 | */ | |
a8170e5e AK |
897 | void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr, |
898 | hwaddr size, unsigned client); | |
093bc2cd AK |
899 | |
900 | /** | |
901 | * memory_region_set_readonly: Turn a memory region read-only (or read-write) | |
902 | * | |
903 | * Allows a memory region to be marked as read-only (turning it into a ROM). | |
904 | * only useful on RAM regions. | |
905 | * | |
906 | * @mr: the region being updated. | |
907 | * @readonly: whether rhe region is to be ROM or RAM. | |
908 | */ | |
909 | void memory_region_set_readonly(MemoryRegion *mr, bool readonly); | |
910 | ||
d0a9b5bc | 911 | /** |
5f9a5ea1 | 912 | * memory_region_rom_device_set_romd: enable/disable ROMD mode |
d0a9b5bc AK |
913 | * |
914 | * Allows a ROM device (initialized with memory_region_init_rom_device() to | |
5f9a5ea1 JK |
915 | * set to ROMD mode (default) or MMIO mode. When it is in ROMD mode, the |
916 | * device is mapped to guest memory and satisfies read access directly. | |
917 | * When in MMIO mode, reads are forwarded to the #MemoryRegion.read function. | |
918 | * Writes are always handled by the #MemoryRegion.write function. | |
d0a9b5bc AK |
919 | * |
920 | * @mr: the memory region to be updated | |
5f9a5ea1 | 921 | * @romd_mode: %true to put the region into ROMD mode |
d0a9b5bc | 922 | */ |
5f9a5ea1 | 923 | void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode); |
d0a9b5bc | 924 | |
093bc2cd AK |
925 | /** |
926 | * memory_region_set_coalescing: Enable memory coalescing for the region. | |
927 | * | |
928 | * Enabled writes to a region to be queued for later processing. MMIO ->write | |
929 | * callbacks may be delayed until a non-coalesced MMIO is issued. | |
930 | * Only useful for IO regions. Roughly similar to write-combining hardware. | |
931 | * | |
932 | * @mr: the memory region to be write coalesced | |
933 | */ | |
934 | void memory_region_set_coalescing(MemoryRegion *mr); | |
935 | ||
936 | /** | |
937 | * memory_region_add_coalescing: Enable memory coalescing for a sub-range of | |
938 | * a region. | |
939 | * | |
940 | * Like memory_region_set_coalescing(), but works on a sub-range of a region. | |
941 | * Multiple calls can be issued coalesced disjoint ranges. | |
942 | * | |
943 | * @mr: the memory region to be updated. | |
944 | * @offset: the start of the range within the region to be coalesced. | |
945 | * @size: the size of the subrange to be coalesced. | |
946 | */ | |
947 | void memory_region_add_coalescing(MemoryRegion *mr, | |
a8170e5e | 948 | hwaddr offset, |
093bc2cd AK |
949 | uint64_t size); |
950 | ||
951 | /** | |
952 | * memory_region_clear_coalescing: Disable MMIO coalescing for the region. | |
953 | * | |
954 | * Disables any coalescing caused by memory_region_set_coalescing() or | |
955 | * memory_region_add_coalescing(). Roughly equivalent to uncacheble memory | |
956 | * hardware. | |
957 | * | |
958 | * @mr: the memory region to be updated. | |
959 | */ | |
960 | void memory_region_clear_coalescing(MemoryRegion *mr); | |
961 | ||
d410515e JK |
962 | /** |
963 | * memory_region_set_flush_coalesced: Enforce memory coalescing flush before | |
964 | * accesses. | |
965 | * | |
966 | * Ensure that pending coalesced MMIO request are flushed before the memory | |
967 | * region is accessed. This property is automatically enabled for all regions | |
968 | * passed to memory_region_set_coalescing() and memory_region_add_coalescing(). | |
969 | * | |
970 | * @mr: the memory region to be updated. | |
971 | */ | |
972 | void memory_region_set_flush_coalesced(MemoryRegion *mr); | |
973 | ||
974 | /** | |
975 | * memory_region_clear_flush_coalesced: Disable memory coalescing flush before | |
976 | * accesses. | |
977 | * | |
978 | * Clear the automatic coalesced MMIO flushing enabled via | |
979 | * memory_region_set_flush_coalesced. Note that this service has no effect on | |
980 | * memory regions that have MMIO coalescing enabled for themselves. For them, | |
981 | * automatic flushing will stop once coalescing is disabled. | |
982 | * | |
983 | * @mr: the memory region to be updated. | |
984 | */ | |
985 | void memory_region_clear_flush_coalesced(MemoryRegion *mr); | |
986 | ||
196ea131 JK |
987 | /** |
988 | * memory_region_set_global_locking: Declares the access processing requires | |
989 | * QEMU's global lock. | |
990 | * | |
991 | * When this is invoked, accesses to the memory region will be processed while | |
992 | * holding the global lock of QEMU. This is the default behavior of memory | |
993 | * regions. | |
994 | * | |
995 | * @mr: the memory region to be updated. | |
996 | */ | |
997 | void memory_region_set_global_locking(MemoryRegion *mr); | |
998 | ||
999 | /** | |
1000 | * memory_region_clear_global_locking: Declares that access processing does | |
1001 | * not depend on the QEMU global lock. | |
1002 | * | |
1003 | * By clearing this property, accesses to the memory region will be processed | |
1004 | * outside of QEMU's global lock (unless the lock is held on when issuing the | |
1005 | * access request). In this case, the device model implementing the access | |
1006 | * handlers is responsible for synchronization of concurrency. | |
1007 | * | |
1008 | * @mr: the memory region to be updated. | |
1009 | */ | |
1010 | void memory_region_clear_global_locking(MemoryRegion *mr); | |
1011 | ||
3e9d69e7 AK |
1012 | /** |
1013 | * memory_region_add_eventfd: Request an eventfd to be triggered when a word | |
1014 | * is written to a location. | |
1015 | * | |
1016 | * Marks a word in an IO region (initialized with memory_region_init_io()) | |
1017 | * as a trigger for an eventfd event. The I/O callback will not be called. | |
69ddaf66 | 1018 | * The caller must be prepared to handle failure (that is, take the required |
3e9d69e7 AK |
1019 | * action if the callback _is_ called). |
1020 | * | |
1021 | * @mr: the memory region being updated. | |
1022 | * @addr: the address within @mr that is to be monitored | |
1023 | * @size: the size of the access to trigger the eventfd | |
1024 | * @match_data: whether to match against @data, instead of just @addr | |
1025 | * @data: the data to match against the guest write | |
1026 | * @fd: the eventfd to be triggered when @addr, @size, and @data all match. | |
1027 | **/ | |
1028 | void memory_region_add_eventfd(MemoryRegion *mr, | |
a8170e5e | 1029 | hwaddr addr, |
3e9d69e7 AK |
1030 | unsigned size, |
1031 | bool match_data, | |
1032 | uint64_t data, | |
753d5e14 | 1033 | EventNotifier *e); |
3e9d69e7 AK |
1034 | |
1035 | /** | |
69ddaf66 | 1036 | * memory_region_del_eventfd: Cancel an eventfd. |
3e9d69e7 | 1037 | * |
69ddaf66 ASRJ |
1038 | * Cancels an eventfd trigger requested by a previous |
1039 | * memory_region_add_eventfd() call. | |
3e9d69e7 AK |
1040 | * |
1041 | * @mr: the memory region being updated. | |
1042 | * @addr: the address within @mr that is to be monitored | |
1043 | * @size: the size of the access to trigger the eventfd | |
1044 | * @match_data: whether to match against @data, instead of just @addr | |
1045 | * @data: the data to match against the guest write | |
1046 | * @fd: the eventfd to be triggered when @addr, @size, and @data all match. | |
1047 | */ | |
1048 | void memory_region_del_eventfd(MemoryRegion *mr, | |
a8170e5e | 1049 | hwaddr addr, |
3e9d69e7 AK |
1050 | unsigned size, |
1051 | bool match_data, | |
1052 | uint64_t data, | |
753d5e14 PB |
1053 | EventNotifier *e); |
1054 | ||
093bc2cd | 1055 | /** |
69ddaf66 | 1056 | * memory_region_add_subregion: Add a subregion to a container. |
093bc2cd | 1057 | * |
69ddaf66 | 1058 | * Adds a subregion at @offset. The subregion may not overlap with other |
093bc2cd AK |
1059 | * subregions (except for those explicitly marked as overlapping). A region |
1060 | * may only be added once as a subregion (unless removed with | |
1061 | * memory_region_del_subregion()); use memory_region_init_alias() if you | |
1062 | * want a region to be a subregion in multiple locations. | |
1063 | * | |
1064 | * @mr: the region to contain the new subregion; must be a container | |
1065 | * initialized with memory_region_init(). | |
1066 | * @offset: the offset relative to @mr where @subregion is added. | |
1067 | * @subregion: the subregion to be added. | |
1068 | */ | |
1069 | void memory_region_add_subregion(MemoryRegion *mr, | |
a8170e5e | 1070 | hwaddr offset, |
093bc2cd AK |
1071 | MemoryRegion *subregion); |
1072 | /** | |
1a7e8cae BZ |
1073 | * memory_region_add_subregion_overlap: Add a subregion to a container |
1074 | * with overlap. | |
093bc2cd | 1075 | * |
69ddaf66 | 1076 | * Adds a subregion at @offset. The subregion may overlap with other |
093bc2cd AK |
1077 | * subregions. Conflicts are resolved by having a higher @priority hide a |
1078 | * lower @priority. Subregions without priority are taken as @priority 0. | |
1079 | * A region may only be added once as a subregion (unless removed with | |
1080 | * memory_region_del_subregion()); use memory_region_init_alias() if you | |
1081 | * want a region to be a subregion in multiple locations. | |
1082 | * | |
1083 | * @mr: the region to contain the new subregion; must be a container | |
1084 | * initialized with memory_region_init(). | |
1085 | * @offset: the offset relative to @mr where @subregion is added. | |
1086 | * @subregion: the subregion to be added. | |
1087 | * @priority: used for resolving overlaps; highest priority wins. | |
1088 | */ | |
1089 | void memory_region_add_subregion_overlap(MemoryRegion *mr, | |
a8170e5e | 1090 | hwaddr offset, |
093bc2cd | 1091 | MemoryRegion *subregion, |
a1ff8ae0 | 1092 | int priority); |
e34911c4 AK |
1093 | |
1094 | /** | |
1095 | * memory_region_get_ram_addr: Get the ram address associated with a memory | |
1096 | * region | |
e34911c4 | 1097 | */ |
7ebb2745 | 1098 | ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr); |
e34911c4 | 1099 | |
a2b257d6 | 1100 | uint64_t memory_region_get_alignment(const MemoryRegion *mr); |
093bc2cd AK |
1101 | /** |
1102 | * memory_region_del_subregion: Remove a subregion. | |
1103 | * | |
1104 | * Removes a subregion from its container. | |
1105 | * | |
1106 | * @mr: the container to be updated. | |
1107 | * @subregion: the region being removed; must be a current subregion of @mr. | |
1108 | */ | |
1109 | void memory_region_del_subregion(MemoryRegion *mr, | |
1110 | MemoryRegion *subregion); | |
1111 | ||
6bba19ba AK |
1112 | /* |
1113 | * memory_region_set_enabled: dynamically enable or disable a region | |
1114 | * | |
1115 | * Enables or disables a memory region. A disabled memory region | |
1116 | * ignores all accesses to itself and its subregions. It does not | |
1117 | * obscure sibling subregions with lower priority - it simply behaves as | |
1118 | * if it was removed from the hierarchy. | |
1119 | * | |
1120 | * Regions default to being enabled. | |
1121 | * | |
1122 | * @mr: the region to be updated | |
1123 | * @enabled: whether to enable or disable the region | |
1124 | */ | |
1125 | void memory_region_set_enabled(MemoryRegion *mr, bool enabled); | |
1126 | ||
2282e1af AK |
1127 | /* |
1128 | * memory_region_set_address: dynamically update the address of a region | |
1129 | * | |
feca4ac1 | 1130 | * Dynamically updates the address of a region, relative to its container. |
2282e1af AK |
1131 | * May be used on regions are currently part of a memory hierarchy. |
1132 | * | |
1133 | * @mr: the region to be updated | |
feca4ac1 | 1134 | * @addr: new address, relative to container region |
2282e1af | 1135 | */ |
a8170e5e | 1136 | void memory_region_set_address(MemoryRegion *mr, hwaddr addr); |
2282e1af | 1137 | |
e7af4c67 MT |
1138 | /* |
1139 | * memory_region_set_size: dynamically update the size of a region. | |
1140 | * | |
1141 | * Dynamically updates the size of a region. | |
1142 | * | |
1143 | * @mr: the region to be updated | |
1144 | * @size: used size of the region. | |
1145 | */ | |
1146 | void memory_region_set_size(MemoryRegion *mr, uint64_t size); | |
1147 | ||
4703359e AK |
1148 | /* |
1149 | * memory_region_set_alias_offset: dynamically update a memory alias's offset | |
1150 | * | |
1151 | * Dynamically updates the offset into the target region that an alias points | |
1152 | * to, as if the fourth argument to memory_region_init_alias() has changed. | |
1153 | * | |
1154 | * @mr: the #MemoryRegion to be updated; should be an alias. | |
1155 | * @offset: the new offset into the target memory region | |
1156 | */ | |
1157 | void memory_region_set_alias_offset(MemoryRegion *mr, | |
a8170e5e | 1158 | hwaddr offset); |
4703359e | 1159 | |
3ce10901 | 1160 | /** |
feca4ac1 PB |
1161 | * memory_region_present: checks if an address relative to a @container |
1162 | * translates into #MemoryRegion within @container | |
3ce10901 | 1163 | * |
feca4ac1 | 1164 | * Answer whether a #MemoryRegion within @container covers the address |
3ce10901 PB |
1165 | * @addr. |
1166 | * | |
feca4ac1 PB |
1167 | * @container: a #MemoryRegion within which @addr is a relative address |
1168 | * @addr: the area within @container to be searched | |
3ce10901 | 1169 | */ |
feca4ac1 | 1170 | bool memory_region_present(MemoryRegion *container, hwaddr addr); |
3ce10901 | 1171 | |
eed2bacf IM |
1172 | /** |
1173 | * memory_region_is_mapped: returns true if #MemoryRegion is mapped | |
1174 | * into any address space. | |
1175 | * | |
1176 | * @mr: a #MemoryRegion which should be checked if it's mapped | |
1177 | */ | |
1178 | bool memory_region_is_mapped(MemoryRegion *mr); | |
1179 | ||
e2177955 | 1180 | /** |
73034e9e PB |
1181 | * memory_region_find: translate an address/size relative to a |
1182 | * MemoryRegion into a #MemoryRegionSection. | |
e2177955 | 1183 | * |
73034e9e PB |
1184 | * Locates the first #MemoryRegion within @mr that overlaps the range |
1185 | * given by @addr and @size. | |
e2177955 AK |
1186 | * |
1187 | * Returns a #MemoryRegionSection that describes a contiguous overlap. | |
1188 | * It will have the following characteristics: | |
e2177955 AK |
1189 | * .@size = 0 iff no overlap was found |
1190 | * .@mr is non-%NULL iff an overlap was found | |
1191 | * | |
73034e9e PB |
1192 | * Remember that in the return value the @offset_within_region is |
1193 | * relative to the returned region (in the .@mr field), not to the | |
1194 | * @mr argument. | |
1195 | * | |
1196 | * Similarly, the .@offset_within_address_space is relative to the | |
1197 | * address space that contains both regions, the passed and the | |
1198 | * returned one. However, in the special case where the @mr argument | |
feca4ac1 | 1199 | * has no container (and thus is the root of the address space), the |
73034e9e PB |
1200 | * following will hold: |
1201 | * .@offset_within_address_space >= @addr | |
1202 | * .@offset_within_address_space + .@size <= @addr + @size | |
1203 | * | |
1204 | * @mr: a MemoryRegion within which @addr is a relative address | |
1205 | * @addr: start of the area within @as to be searched | |
e2177955 AK |
1206 | * @size: size of the area to be searched |
1207 | */ | |
73034e9e | 1208 | MemoryRegionSection memory_region_find(MemoryRegion *mr, |
a8170e5e | 1209 | hwaddr addr, uint64_t size); |
e2177955 | 1210 | |
86e775c6 | 1211 | /** |
9c1f8f44 | 1212 | * memory_global_dirty_log_sync: synchronize the dirty log for all memory |
86e775c6 | 1213 | * |
9c1f8f44 | 1214 | * Synchronizes the dirty page log for all address spaces. |
86e775c6 | 1215 | */ |
9c1f8f44 | 1216 | void memory_global_dirty_log_sync(void); |
86e775c6 | 1217 | |
69ddaf66 ASRJ |
1218 | /** |
1219 | * memory_region_transaction_begin: Start a transaction. | |
1220 | * | |
1221 | * During a transaction, changes will be accumulated and made visible | |
dabdf394 | 1222 | * only when the transaction ends (is committed). |
4ef4db86 AK |
1223 | */ |
1224 | void memory_region_transaction_begin(void); | |
69ddaf66 ASRJ |
1225 | |
1226 | /** | |
1227 | * memory_region_transaction_commit: Commit a transaction and make changes | |
1228 | * visible to the guest. | |
4ef4db86 AK |
1229 | */ |
1230 | void memory_region_transaction_commit(void); | |
1231 | ||
7664e80c AK |
1232 | /** |
1233 | * memory_listener_register: register callbacks to be called when memory | |
1234 | * sections are mapped or unmapped into an address | |
1235 | * space | |
1236 | * | |
1237 | * @listener: an object containing the callbacks to be called | |
7376e582 | 1238 | * @filter: if non-%NULL, only regions in this address space will be observed |
7664e80c | 1239 | */ |
f6790af6 | 1240 | void memory_listener_register(MemoryListener *listener, AddressSpace *filter); |
7664e80c AK |
1241 | |
1242 | /** | |
1243 | * memory_listener_unregister: undo the effect of memory_listener_register() | |
1244 | * | |
1245 | * @listener: an object containing the callbacks to be removed | |
1246 | */ | |
1247 | void memory_listener_unregister(MemoryListener *listener); | |
1248 | ||
1249 | /** | |
1250 | * memory_global_dirty_log_start: begin dirty logging for all regions | |
1251 | */ | |
1252 | void memory_global_dirty_log_start(void); | |
1253 | ||
1254 | /** | |
1a7e8cae | 1255 | * memory_global_dirty_log_stop: end dirty logging for all regions |
7664e80c AK |
1256 | */ |
1257 | void memory_global_dirty_log_stop(void); | |
1258 | ||
57bb40c9 | 1259 | void mtree_info(fprintf_function mon_printf, void *f, bool flatview); |
314e2987 | 1260 | |
3b643495 PM |
1261 | /** |
1262 | * memory_region_dispatch_read: perform a read directly to the specified | |
1263 | * MemoryRegion. | |
1264 | * | |
1265 | * @mr: #MemoryRegion to access | |
1266 | * @addr: address within that region | |
1267 | * @pval: pointer to uint64_t which the data is written to | |
1268 | * @size: size of the access in bytes | |
1269 | * @attrs: memory transaction attributes to use for the access | |
1270 | */ | |
1271 | MemTxResult memory_region_dispatch_read(MemoryRegion *mr, | |
1272 | hwaddr addr, | |
1273 | uint64_t *pval, | |
1274 | unsigned size, | |
1275 | MemTxAttrs attrs); | |
1276 | /** | |
1277 | * memory_region_dispatch_write: perform a write directly to the specified | |
1278 | * MemoryRegion. | |
1279 | * | |
1280 | * @mr: #MemoryRegion to access | |
1281 | * @addr: address within that region | |
1282 | * @data: data to write | |
1283 | * @size: size of the access in bytes | |
1284 | * @attrs: memory transaction attributes to use for the access | |
1285 | */ | |
1286 | MemTxResult memory_region_dispatch_write(MemoryRegion *mr, | |
1287 | hwaddr addr, | |
1288 | uint64_t data, | |
1289 | unsigned size, | |
1290 | MemTxAttrs attrs); | |
1291 | ||
9ad2bbc1 AK |
1292 | /** |
1293 | * address_space_init: initializes an address space | |
1294 | * | |
1295 | * @as: an uninitialized #AddressSpace | |
67cc32eb | 1296 | * @root: a #MemoryRegion that routes addresses for the address space |
7dca8043 AK |
1297 | * @name: an address space name. The name is only used for debugging |
1298 | * output. | |
9ad2bbc1 | 1299 | */ |
7dca8043 | 1300 | void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name); |
9ad2bbc1 | 1301 | |
f0c02d15 PC |
1302 | /** |
1303 | * address_space_init_shareable: return an address space for a memory region, | |
1304 | * creating it if it does not already exist | |
1305 | * | |
1306 | * @root: a #MemoryRegion that routes addresses for the address space | |
1307 | * @name: an address space name. The name is only used for debugging | |
1308 | * output. | |
1309 | * | |
1310 | * This function will return a pointer to an existing AddressSpace | |
1311 | * which was initialized with the specified MemoryRegion, or it will | |
1312 | * create and initialize one if it does not already exist. The ASes | |
1313 | * are reference-counted, so the memory will be freed automatically | |
1314 | * when the AddressSpace is destroyed via address_space_destroy. | |
1315 | */ | |
1316 | AddressSpace *address_space_init_shareable(MemoryRegion *root, | |
1317 | const char *name); | |
83f3c251 AK |
1318 | |
1319 | /** | |
1320 | * address_space_destroy: destroy an address space | |
1321 | * | |
1322 | * Releases all resources associated with an address space. After an address space | |
1323 | * is destroyed, its root memory region (given by address_space_init()) may be destroyed | |
1324 | * as well. | |
1325 | * | |
1326 | * @as: address space to be destroyed | |
1327 | */ | |
1328 | void address_space_destroy(AddressSpace *as); | |
1329 | ||
ac1970fb AK |
1330 | /** |
1331 | * address_space_rw: read from or write to an address space. | |
1332 | * | |
5c9eb028 PM |
1333 | * Return a MemTxResult indicating whether the operation succeeded |
1334 | * or failed (eg unassigned memory, device rejected the transaction, | |
1335 | * IOMMU fault). | |
fd8aaa76 | 1336 | * |
ac1970fb AK |
1337 | * @as: #AddressSpace to be accessed |
1338 | * @addr: address within that address space | |
5c9eb028 | 1339 | * @attrs: memory transaction attributes |
ac1970fb AK |
1340 | * @buf: buffer with the data transferred |
1341 | * @is_write: indicates the transfer direction | |
1342 | */ | |
5c9eb028 PM |
1343 | MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, |
1344 | MemTxAttrs attrs, uint8_t *buf, | |
1345 | int len, bool is_write); | |
ac1970fb AK |
1346 | |
1347 | /** | |
1348 | * address_space_write: write to address space. | |
1349 | * | |
5c9eb028 PM |
1350 | * Return a MemTxResult indicating whether the operation succeeded |
1351 | * or failed (eg unassigned memory, device rejected the transaction, | |
1352 | * IOMMU fault). | |
fd8aaa76 | 1353 | * |
ac1970fb AK |
1354 | * @as: #AddressSpace to be accessed |
1355 | * @addr: address within that address space | |
5c9eb028 | 1356 | * @attrs: memory transaction attributes |
ac1970fb AK |
1357 | * @buf: buffer with the data transferred |
1358 | */ | |
5c9eb028 PM |
1359 | MemTxResult address_space_write(AddressSpace *as, hwaddr addr, |
1360 | MemTxAttrs attrs, | |
1361 | const uint8_t *buf, int len); | |
ac1970fb | 1362 | |
3cc8f884 | 1363 | /* address_space_ld*: load from an address space |
50013115 PM |
1364 | * address_space_st*: store to an address space |
1365 | * | |
1366 | * These functions perform a load or store of the byte, word, | |
1367 | * longword or quad to the specified address within the AddressSpace. | |
1368 | * The _le suffixed functions treat the data as little endian; | |
1369 | * _be indicates big endian; no suffix indicates "same endianness | |
1370 | * as guest CPU". | |
1371 | * | |
1372 | * The "guest CPU endianness" accessors are deprecated for use outside | |
1373 | * target-* code; devices should be CPU-agnostic and use either the LE | |
1374 | * or the BE accessors. | |
1375 | * | |
1376 | * @as #AddressSpace to be accessed | |
1377 | * @addr: address within that address space | |
1378 | * @val: data value, for stores | |
1379 | * @attrs: memory transaction attributes | |
1380 | * @result: location to write the success/failure of the transaction; | |
1381 | * if NULL, this information is discarded | |
1382 | */ | |
1383 | uint32_t address_space_ldub(AddressSpace *as, hwaddr addr, | |
1384 | MemTxAttrs attrs, MemTxResult *result); | |
1385 | uint32_t address_space_lduw_le(AddressSpace *as, hwaddr addr, | |
1386 | MemTxAttrs attrs, MemTxResult *result); | |
1387 | uint32_t address_space_lduw_be(AddressSpace *as, hwaddr addr, | |
1388 | MemTxAttrs attrs, MemTxResult *result); | |
1389 | uint32_t address_space_ldl_le(AddressSpace *as, hwaddr addr, | |
1390 | MemTxAttrs attrs, MemTxResult *result); | |
1391 | uint32_t address_space_ldl_be(AddressSpace *as, hwaddr addr, | |
1392 | MemTxAttrs attrs, MemTxResult *result); | |
1393 | uint64_t address_space_ldq_le(AddressSpace *as, hwaddr addr, | |
1394 | MemTxAttrs attrs, MemTxResult *result); | |
1395 | uint64_t address_space_ldq_be(AddressSpace *as, hwaddr addr, | |
1396 | MemTxAttrs attrs, MemTxResult *result); | |
1397 | void address_space_stb(AddressSpace *as, hwaddr addr, uint32_t val, | |
1398 | MemTxAttrs attrs, MemTxResult *result); | |
1399 | void address_space_stw_le(AddressSpace *as, hwaddr addr, uint32_t val, | |
1400 | MemTxAttrs attrs, MemTxResult *result); | |
1401 | void address_space_stw_be(AddressSpace *as, hwaddr addr, uint32_t val, | |
1402 | MemTxAttrs attrs, MemTxResult *result); | |
1403 | void address_space_stl_le(AddressSpace *as, hwaddr addr, uint32_t val, | |
1404 | MemTxAttrs attrs, MemTxResult *result); | |
1405 | void address_space_stl_be(AddressSpace *as, hwaddr addr, uint32_t val, | |
1406 | MemTxAttrs attrs, MemTxResult *result); | |
1407 | void address_space_stq_le(AddressSpace *as, hwaddr addr, uint64_t val, | |
1408 | MemTxAttrs attrs, MemTxResult *result); | |
1409 | void address_space_stq_be(AddressSpace *as, hwaddr addr, uint64_t val, | |
1410 | MemTxAttrs attrs, MemTxResult *result); | |
1411 | ||
0ce265ff PB |
1412 | uint32_t ldub_phys(AddressSpace *as, hwaddr addr); |
1413 | uint32_t lduw_le_phys(AddressSpace *as, hwaddr addr); | |
1414 | uint32_t lduw_be_phys(AddressSpace *as, hwaddr addr); | |
1415 | uint32_t ldl_le_phys(AddressSpace *as, hwaddr addr); | |
1416 | uint32_t ldl_be_phys(AddressSpace *as, hwaddr addr); | |
1417 | uint64_t ldq_le_phys(AddressSpace *as, hwaddr addr); | |
1418 | uint64_t ldq_be_phys(AddressSpace *as, hwaddr addr); | |
1419 | void stb_phys(AddressSpace *as, hwaddr addr, uint32_t val); | |
1420 | void stw_le_phys(AddressSpace *as, hwaddr addr, uint32_t val); | |
1421 | void stw_be_phys(AddressSpace *as, hwaddr addr, uint32_t val); | |
1422 | void stl_le_phys(AddressSpace *as, hwaddr addr, uint32_t val); | |
1423 | void stl_be_phys(AddressSpace *as, hwaddr addr, uint32_t val); | |
1424 | void stq_le_phys(AddressSpace *as, hwaddr addr, uint64_t val); | |
1425 | void stq_be_phys(AddressSpace *as, hwaddr addr, uint64_t val); | |
1426 | ||
1f4e496e PB |
1427 | struct MemoryRegionCache { |
1428 | hwaddr xlat; | |
1f4e496e | 1429 | hwaddr len; |
90c4fe5f | 1430 | AddressSpace *as; |
1f4e496e PB |
1431 | }; |
1432 | ||
90c4fe5f | 1433 | #define MEMORY_REGION_CACHE_INVALID ((MemoryRegionCache) { .as = NULL }) |
5eba0404 | 1434 | |
1f4e496e PB |
1435 | /* address_space_cache_init: prepare for repeated access to a physical |
1436 | * memory region | |
1437 | * | |
1438 | * @cache: #MemoryRegionCache to be filled | |
1439 | * @as: #AddressSpace to be accessed | |
1440 | * @addr: address within that address space | |
1441 | * @len: length of buffer | |
1442 | * @is_write: indicates the transfer direction | |
1443 | * | |
1444 | * Will only work with RAM, and may map a subset of the requested range by | |
1445 | * returning a value that is less than @len. On failure, return a negative | |
1446 | * errno value. | |
1447 | * | |
1448 | * Because it only works with RAM, this function can be used for | |
1449 | * read-modify-write operations. In this case, is_write should be %true. | |
1450 | * | |
1451 | * Note that addresses passed to the address_space_*_cached functions | |
1452 | * are relative to @addr. | |
1453 | */ | |
1454 | int64_t address_space_cache_init(MemoryRegionCache *cache, | |
1455 | AddressSpace *as, | |
1456 | hwaddr addr, | |
1457 | hwaddr len, | |
1458 | bool is_write); | |
1459 | ||
1460 | /** | |
1461 | * address_space_cache_invalidate: complete a write to a #MemoryRegionCache | |
1462 | * | |
1463 | * @cache: The #MemoryRegionCache to operate on. | |
1464 | * @addr: The first physical address that was written, relative to the | |
1465 | * address that was passed to @address_space_cache_init. | |
1466 | * @access_len: The number of bytes that were written starting at @addr. | |
1467 | */ | |
1468 | void address_space_cache_invalidate(MemoryRegionCache *cache, | |
1469 | hwaddr addr, | |
1470 | hwaddr access_len); | |
1471 | ||
1472 | /** | |
1473 | * address_space_cache_destroy: free a #MemoryRegionCache | |
1474 | * | |
1475 | * @cache: The #MemoryRegionCache whose memory should be released. | |
1476 | */ | |
1477 | void address_space_cache_destroy(MemoryRegionCache *cache); | |
1478 | ||
1479 | /* address_space_ld*_cached: load from a cached #MemoryRegion | |
1480 | * address_space_st*_cached: store into a cached #MemoryRegion | |
1481 | * | |
1482 | * These functions perform a load or store of the byte, word, | |
1483 | * longword or quad to the specified address. The address is | |
1484 | * a physical address in the AddressSpace, but it must lie within | |
1485 | * a #MemoryRegion that was mapped with address_space_cache_init. | |
1486 | * | |
1487 | * The _le suffixed functions treat the data as little endian; | |
1488 | * _be indicates big endian; no suffix indicates "same endianness | |
1489 | * as guest CPU". | |
1490 | * | |
1491 | * The "guest CPU endianness" accessors are deprecated for use outside | |
1492 | * target-* code; devices should be CPU-agnostic and use either the LE | |
1493 | * or the BE accessors. | |
1494 | * | |
1495 | * @cache: previously initialized #MemoryRegionCache to be accessed | |
1496 | * @addr: address within the address space | |
1497 | * @val: data value, for stores | |
1498 | * @attrs: memory transaction attributes | |
1499 | * @result: location to write the success/failure of the transaction; | |
1500 | * if NULL, this information is discarded | |
1501 | */ | |
1502 | uint32_t address_space_ldub_cached(MemoryRegionCache *cache, hwaddr addr, | |
1503 | MemTxAttrs attrs, MemTxResult *result); | |
1504 | uint32_t address_space_lduw_le_cached(MemoryRegionCache *cache, hwaddr addr, | |
1505 | MemTxAttrs attrs, MemTxResult *result); | |
1506 | uint32_t address_space_lduw_be_cached(MemoryRegionCache *cache, hwaddr addr, | |
1507 | MemTxAttrs attrs, MemTxResult *result); | |
1508 | uint32_t address_space_ldl_le_cached(MemoryRegionCache *cache, hwaddr addr, | |
1509 | MemTxAttrs attrs, MemTxResult *result); | |
1510 | uint32_t address_space_ldl_be_cached(MemoryRegionCache *cache, hwaddr addr, | |
1511 | MemTxAttrs attrs, MemTxResult *result); | |
1512 | uint64_t address_space_ldq_le_cached(MemoryRegionCache *cache, hwaddr addr, | |
1513 | MemTxAttrs attrs, MemTxResult *result); | |
1514 | uint64_t address_space_ldq_be_cached(MemoryRegionCache *cache, hwaddr addr, | |
1515 | MemTxAttrs attrs, MemTxResult *result); | |
1516 | void address_space_stb_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val, | |
1517 | MemTxAttrs attrs, MemTxResult *result); | |
1518 | void address_space_stw_le_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val, | |
1519 | MemTxAttrs attrs, MemTxResult *result); | |
1520 | void address_space_stw_be_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val, | |
1521 | MemTxAttrs attrs, MemTxResult *result); | |
1522 | void address_space_stl_le_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val, | |
1523 | MemTxAttrs attrs, MemTxResult *result); | |
1524 | void address_space_stl_be_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val, | |
1525 | MemTxAttrs attrs, MemTxResult *result); | |
1526 | void address_space_stq_le_cached(MemoryRegionCache *cache, hwaddr addr, uint64_t val, | |
1527 | MemTxAttrs attrs, MemTxResult *result); | |
1528 | void address_space_stq_be_cached(MemoryRegionCache *cache, hwaddr addr, uint64_t val, | |
1529 | MemTxAttrs attrs, MemTxResult *result); | |
1530 | ||
1531 | uint32_t ldub_phys_cached(MemoryRegionCache *cache, hwaddr addr); | |
1532 | uint32_t lduw_le_phys_cached(MemoryRegionCache *cache, hwaddr addr); | |
1533 | uint32_t lduw_be_phys_cached(MemoryRegionCache *cache, hwaddr addr); | |
1534 | uint32_t ldl_le_phys_cached(MemoryRegionCache *cache, hwaddr addr); | |
1535 | uint32_t ldl_be_phys_cached(MemoryRegionCache *cache, hwaddr addr); | |
1536 | uint64_t ldq_le_phys_cached(MemoryRegionCache *cache, hwaddr addr); | |
1537 | uint64_t ldq_be_phys_cached(MemoryRegionCache *cache, hwaddr addr); | |
1538 | void stb_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val); | |
1539 | void stw_le_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val); | |
1540 | void stw_be_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val); | |
1541 | void stl_le_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val); | |
1542 | void stl_be_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val); | |
1543 | void stq_le_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint64_t val); | |
1544 | void stq_be_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint64_t val); | |
052c8fa9 JW |
1545 | /* address_space_get_iotlb_entry: translate an address into an IOTLB |
1546 | * entry. Should be called from an RCU critical section. | |
1547 | */ | |
1548 | IOMMUTLBEntry address_space_get_iotlb_entry(AddressSpace *as, hwaddr addr, | |
1549 | bool is_write); | |
1f4e496e | 1550 | |
149f54b5 | 1551 | /* address_space_translate: translate an address range into an address space |
41063e1e PB |
1552 | * into a MemoryRegion and an address range into that section. Should be |
1553 | * called from an RCU critical section, to avoid that the last reference | |
1554 | * to the returned region disappears after address_space_translate returns. | |
149f54b5 PB |
1555 | * |
1556 | * @as: #AddressSpace to be accessed | |
1557 | * @addr: address within that address space | |
1558 | * @xlat: pointer to address within the returned memory region section's | |
1559 | * #MemoryRegion. | |
1560 | * @len: pointer to length | |
1561 | * @is_write: indicates the transfer direction | |
1562 | */ | |
5c8a00ce PB |
1563 | MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr, |
1564 | hwaddr *xlat, hwaddr *len, | |
1565 | bool is_write); | |
149f54b5 | 1566 | |
51644ab7 PB |
1567 | /* address_space_access_valid: check for validity of accessing an address |
1568 | * space range | |
1569 | * | |
30951157 AK |
1570 | * Check whether memory is assigned to the given address space range, and |
1571 | * access is permitted by any IOMMU regions that are active for the address | |
1572 | * space. | |
51644ab7 PB |
1573 | * |
1574 | * For now, addr and len should be aligned to a page size. This limitation | |
1575 | * will be lifted in the future. | |
1576 | * | |
1577 | * @as: #AddressSpace to be accessed | |
1578 | * @addr: address within that address space | |
1579 | * @len: length of the area to be checked | |
1580 | * @is_write: indicates the transfer direction | |
1581 | */ | |
1582 | bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write); | |
1583 | ||
ac1970fb AK |
1584 | /* address_space_map: map a physical memory region into a host virtual address |
1585 | * | |
1586 | * May map a subset of the requested range, given by and returned in @plen. | |
1587 | * May return %NULL if resources needed to perform the mapping are exhausted. | |
1588 | * Use only for reads OR writes - not for read-modify-write operations. | |
1589 | * Use cpu_register_map_client() to know when retrying the map operation is | |
1590 | * likely to succeed. | |
1591 | * | |
1592 | * @as: #AddressSpace to be accessed | |
1593 | * @addr: address within that address space | |
1594 | * @plen: pointer to length of buffer; updated on return | |
1595 | * @is_write: indicates the transfer direction | |
1596 | */ | |
a8170e5e AK |
1597 | void *address_space_map(AddressSpace *as, hwaddr addr, |
1598 | hwaddr *plen, bool is_write); | |
ac1970fb AK |
1599 | |
1600 | /* address_space_unmap: Unmaps a memory region previously mapped by address_space_map() | |
1601 | * | |
1602 | * Will also mark the memory as dirty if @is_write == %true. @access_len gives | |
1603 | * the amount of memory that was actually read or written by the caller. | |
1604 | * | |
1605 | * @as: #AddressSpace used | |
1606 | * @addr: address within that address space | |
1607 | * @len: buffer length as returned by address_space_map() | |
1608 | * @access_len: amount of data actually transferred | |
1609 | * @is_write: indicates the transfer direction | |
1610 | */ | |
a8170e5e AK |
1611 | void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len, |
1612 | int is_write, hwaddr access_len); | |
ac1970fb AK |
1613 | |
1614 | ||
a203ac70 PB |
1615 | /* Internal functions, part of the implementation of address_space_read. */ |
1616 | MemTxResult address_space_read_continue(AddressSpace *as, hwaddr addr, | |
1617 | MemTxAttrs attrs, uint8_t *buf, | |
1618 | int len, hwaddr addr1, hwaddr l, | |
1619 | MemoryRegion *mr); | |
3cc8f884 PB |
1620 | MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr, |
1621 | MemTxAttrs attrs, uint8_t *buf, int len); | |
0878d0e1 | 1622 | void *qemu_map_ram_ptr(RAMBlock *ram_block, ram_addr_t addr); |
3cc8f884 PB |
1623 | |
1624 | static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write) | |
1625 | { | |
1626 | if (is_write) { | |
4a2e242b AW |
1627 | return memory_region_is_ram(mr) && |
1628 | !mr->readonly && !memory_region_is_ram_device(mr); | |
3cc8f884 | 1629 | } else { |
4a2e242b AW |
1630 | return (memory_region_is_ram(mr) && !memory_region_is_ram_device(mr)) || |
1631 | memory_region_is_romd(mr); | |
3cc8f884 | 1632 | } |
3cc8f884 PB |
1633 | } |
1634 | ||
1635 | /** | |
1636 | * address_space_read: read from an address space. | |
1637 | * | |
1638 | * Return a MemTxResult indicating whether the operation succeeded | |
1639 | * or failed (eg unassigned memory, device rejected the transaction, | |
1640 | * IOMMU fault). | |
1641 | * | |
1642 | * @as: #AddressSpace to be accessed | |
1643 | * @addr: address within that address space | |
1644 | * @attrs: memory transaction attributes | |
1645 | * @buf: buffer with the data transferred | |
1646 | */ | |
1647 | static inline __attribute__((__always_inline__)) | |
1648 | MemTxResult address_space_read(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, | |
1649 | uint8_t *buf, int len) | |
1650 | { | |
1651 | MemTxResult result = MEMTX_OK; | |
1652 | hwaddr l, addr1; | |
1653 | void *ptr; | |
1654 | MemoryRegion *mr; | |
1655 | ||
1656 | if (__builtin_constant_p(len)) { | |
1657 | if (len) { | |
1658 | rcu_read_lock(); | |
1659 | l = len; | |
1660 | mr = address_space_translate(as, addr, &addr1, &l, false); | |
1661 | if (len == l && memory_access_is_direct(mr, false)) { | |
0878d0e1 | 1662 | ptr = qemu_map_ram_ptr(mr->ram_block, addr1); |
3cc8f884 PB |
1663 | memcpy(buf, ptr, len); |
1664 | } else { | |
1665 | result = address_space_read_continue(as, addr, attrs, buf, len, | |
1666 | addr1, l, mr); | |
1667 | } | |
1668 | rcu_read_unlock(); | |
1669 | } | |
1670 | } else { | |
1671 | result = address_space_read_full(as, addr, attrs, buf, len); | |
1672 | } | |
1673 | return result; | |
1674 | } | |
a203ac70 | 1675 | |
1f4e496e PB |
1676 | /** |
1677 | * address_space_read_cached: read from a cached RAM region | |
1678 | * | |
1679 | * @cache: Cached region to be addressed | |
1680 | * @addr: address relative to the base of the RAM region | |
1681 | * @buf: buffer with the data transferred | |
1682 | * @len: length of the data transferred | |
1683 | */ | |
1684 | static inline void | |
1685 | address_space_read_cached(MemoryRegionCache *cache, hwaddr addr, | |
1686 | void *buf, int len) | |
1687 | { | |
1688 | assert(addr < cache->len && len <= cache->len - addr); | |
90c4fe5f | 1689 | address_space_read(cache->as, cache->xlat + addr, MEMTXATTRS_UNSPECIFIED, buf, len); |
1f4e496e PB |
1690 | } |
1691 | ||
1692 | /** | |
1693 | * address_space_write_cached: write to a cached RAM region | |
1694 | * | |
1695 | * @cache: Cached region to be addressed | |
1696 | * @addr: address relative to the base of the RAM region | |
1697 | * @buf: buffer with the data transferred | |
1698 | * @len: length of the data transferred | |
1699 | */ | |
1700 | static inline void | |
1701 | address_space_write_cached(MemoryRegionCache *cache, hwaddr addr, | |
1702 | void *buf, int len) | |
1703 | { | |
1704 | assert(addr < cache->len && len <= cache->len - addr); | |
90c4fe5f | 1705 | address_space_write(cache->as, cache->xlat + addr, MEMTXATTRS_UNSPECIFIED, buf, len); |
1f4e496e PB |
1706 | } |
1707 | ||
093bc2cd AK |
1708 | #endif |
1709 | ||
1710 | #endif |