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19#ifndef RAM_ADDR_H
20#define RAM_ADDR_H
21
22#ifndef CONFIG_USER_ONLY
23#include "hw/xen/xen.h"
24#include "exec/ramlist.h"
25
26struct RAMBlock {
27 struct rcu_head rcu;
28 struct MemoryRegion *mr;
29 uint8_t *host;
30 ram_addr_t offset;
31 ram_addr_t used_length;
32 ram_addr_t max_length;
33 void (*resized)(const char*, uint64_t length, void *host);
34 uint32_t flags;
35
36 char idstr[256];
37
38 QLIST_ENTRY(RAMBlock) next;
39 QLIST_HEAD(, RAMBlockNotifier) ramblock_notifiers;
40 int fd;
41 size_t page_size;
42
43 unsigned long *bmap;
44
45
46
47
48
49 unsigned long *unsentmap;
50
51 unsigned long *receivedmap;
52};
53
54static inline bool offset_in_ramblock(RAMBlock *b, ram_addr_t offset)
55{
56 return (b && b->host && offset < b->used_length) ? true : false;
57}
58
59static inline void *ramblock_ptr(RAMBlock *block, ram_addr_t offset)
60{
61 assert(offset_in_ramblock(block, offset));
62 return (char *)block->host + offset;
63}
64
65static inline unsigned long int ramblock_recv_bitmap_offset(void *host_addr,
66 RAMBlock *rb)
67{
68 uint64_t host_addr_offset =
69 (uint64_t)(uintptr_t)(host_addr - (void *)rb->host);
70 return host_addr_offset >> TARGET_PAGE_BITS;
71}
72
73long qemu_getrampagesize(void);
74unsigned long last_ram_page(void);
75RAMBlock *qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
76 bool share, const char *mem_path,
77 Error **errp);
78RAMBlock *qemu_ram_alloc_from_fd(ram_addr_t size, MemoryRegion *mr,
79 bool share, int fd,
80 Error **errp);
81RAMBlock *qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
82 MemoryRegion *mr, Error **errp);
83RAMBlock *qemu_ram_alloc(ram_addr_t size, bool share, MemoryRegion *mr,
84 Error **errp);
85RAMBlock *qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t max_size,
86 void (*resized)(const char*,
87 uint64_t length,
88 void *host),
89 MemoryRegion *mr, Error **errp);
90void qemu_ram_free(RAMBlock *block);
91
92int qemu_ram_resize(RAMBlock *block, ram_addr_t newsize, Error **errp);
93
94#define DIRTY_CLIENTS_ALL ((1 << DIRTY_MEMORY_NUM) - 1)
95#define DIRTY_CLIENTS_NOCODE (DIRTY_CLIENTS_ALL & ~(1 << DIRTY_MEMORY_CODE))
96
97static inline bool cpu_physical_memory_get_dirty(ram_addr_t start,
98 ram_addr_t length,
99 unsigned client)
100{
101 DirtyMemoryBlocks *blocks;
102 unsigned long end, page;
103 unsigned long idx, offset, base;
104 bool dirty = false;
105
106 assert(client < DIRTY_MEMORY_NUM);
107
108 end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
109 page = start >> TARGET_PAGE_BITS;
110
111 rcu_read_lock();
112
113 blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);
114
115 idx = page / DIRTY_MEMORY_BLOCK_SIZE;
116 offset = page % DIRTY_MEMORY_BLOCK_SIZE;
117 base = page - offset;
118 while (page < end) {
119 unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE);
120 unsigned long num = next - base;
121 unsigned long found = find_next_bit(blocks->blocks[idx], num, offset);
122 if (found < num) {
123 dirty = true;
124 break;
125 }
126
127 page = next;
128 idx++;
129 offset = 0;
130 base += DIRTY_MEMORY_BLOCK_SIZE;
131 }
132
133 rcu_read_unlock();
134
135 return dirty;
136}
137
138static inline bool cpu_physical_memory_all_dirty(ram_addr_t start,
139 ram_addr_t length,
140 unsigned client)
141{
142 DirtyMemoryBlocks *blocks;
143 unsigned long end, page;
144 unsigned long idx, offset, base;
145 bool dirty = true;
146
147 assert(client < DIRTY_MEMORY_NUM);
148
149 end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
150 page = start >> TARGET_PAGE_BITS;
151
152 rcu_read_lock();
153
154 blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);
155
156 idx = page / DIRTY_MEMORY_BLOCK_SIZE;
157 offset = page % DIRTY_MEMORY_BLOCK_SIZE;
158 base = page - offset;
159 while (page < end) {
160 unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE);
161 unsigned long num = next - base;
162 unsigned long found = find_next_zero_bit(blocks->blocks[idx], num, offset);
163 if (found < num) {
164 dirty = false;
165 break;
166 }
167
168 page = next;
169 idx++;
170 offset = 0;
171 base += DIRTY_MEMORY_BLOCK_SIZE;
172 }
173
174 rcu_read_unlock();
175
176 return dirty;
177}
178
179static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
180 unsigned client)
181{
182 return cpu_physical_memory_get_dirty(addr, 1, client);
183}
184
185static inline bool cpu_physical_memory_is_clean(ram_addr_t addr)
186{
187 bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA);
188 bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE);
189 bool migration =
190 cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
191 return !(vga && code && migration);
192}
193
194static inline uint8_t cpu_physical_memory_range_includes_clean(ram_addr_t start,
195 ram_addr_t length,
196 uint8_t mask)
197{
198 uint8_t ret = 0;
199
200 if (mask & (1 << DIRTY_MEMORY_VGA) &&
201 !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_VGA)) {
202 ret |= (1 << DIRTY_MEMORY_VGA);
203 }
204 if (mask & (1 << DIRTY_MEMORY_CODE) &&
205 !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_CODE)) {
206 ret |= (1 << DIRTY_MEMORY_CODE);
207 }
208 if (mask & (1 << DIRTY_MEMORY_MIGRATION) &&
209 !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_MIGRATION)) {
210 ret |= (1 << DIRTY_MEMORY_MIGRATION);
211 }
212 return ret;
213}
214
215static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
216 unsigned client)
217{
218 unsigned long page, idx, offset;
219 DirtyMemoryBlocks *blocks;
220
221 assert(client < DIRTY_MEMORY_NUM);
222
223 page = addr >> TARGET_PAGE_BITS;
224 idx = page / DIRTY_MEMORY_BLOCK_SIZE;
225 offset = page % DIRTY_MEMORY_BLOCK_SIZE;
226
227 rcu_read_lock();
228
229 blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);
230
231 set_bit_atomic(offset, blocks->blocks[idx]);
232
233 rcu_read_unlock();
234}
235
236static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
237 ram_addr_t length,
238 uint8_t mask)
239{
240 DirtyMemoryBlocks *blocks[DIRTY_MEMORY_NUM];
241 unsigned long end, page;
242 unsigned long idx, offset, base;
243 int i;
244
245 if (!mask && !xen_enabled()) {
246 return;
247 }
248
249 end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
250 page = start >> TARGET_PAGE_BITS;
251
252 rcu_read_lock();
253
254 for (i = 0; i < DIRTY_MEMORY_NUM; i++) {
255 blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i]);
256 }
257
258 idx = page / DIRTY_MEMORY_BLOCK_SIZE;
259 offset = page % DIRTY_MEMORY_BLOCK_SIZE;
260 base = page - offset;
261 while (page < end) {
262 unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE);
263
264 if (likely(mask & (1 << DIRTY_MEMORY_MIGRATION))) {
265 bitmap_set_atomic(blocks[DIRTY_MEMORY_MIGRATION]->blocks[idx],
266 offset, next - page);
267 }
268 if (unlikely(mask & (1 << DIRTY_MEMORY_VGA))) {
269 bitmap_set_atomic(blocks[DIRTY_MEMORY_VGA]->blocks[idx],
270 offset, next - page);
271 }
272 if (unlikely(mask & (1 << DIRTY_MEMORY_CODE))) {
273 bitmap_set_atomic(blocks[DIRTY_MEMORY_CODE]->blocks[idx],
274 offset, next - page);
275 }
276
277 page = next;
278 idx++;
279 offset = 0;
280 base += DIRTY_MEMORY_BLOCK_SIZE;
281 }
282
283 rcu_read_unlock();
284
285 xen_hvm_modified_memory(start, length);
286}
287
288#if !defined(_WIN32)
289static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
290 ram_addr_t start,
291 ram_addr_t pages)
292{
293 unsigned long i, j;
294 unsigned long page_number, c;
295 hwaddr addr;
296 ram_addr_t ram_addr;
297 unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
298 unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
299 unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
300
301
302 if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) &&
303 (hpratio == 1)) {
304 unsigned long **blocks[DIRTY_MEMORY_NUM];
305 unsigned long idx;
306 unsigned long offset;
307 long k;
308 long nr = BITS_TO_LONGS(pages);
309
310 idx = (start >> TARGET_PAGE_BITS) / DIRTY_MEMORY_BLOCK_SIZE;
311 offset = BIT_WORD((start >> TARGET_PAGE_BITS) %
312 DIRTY_MEMORY_BLOCK_SIZE);
313
314 rcu_read_lock();
315
316 for (i = 0; i < DIRTY_MEMORY_NUM; i++) {
317 blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i])->blocks;
318 }
319
320 for (k = 0; k < nr; k++) {
321 if (bitmap[k]) {
322 unsigned long temp = leul_to_cpu(bitmap[k]);
323
324 atomic_or(&blocks[DIRTY_MEMORY_MIGRATION][idx][offset], temp);
325 atomic_or(&blocks[DIRTY_MEMORY_VGA][idx][offset], temp);
326 if (tcg_enabled()) {
327 atomic_or(&blocks[DIRTY_MEMORY_CODE][idx][offset], temp);
328 }
329 }
330
331 if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) {
332 offset = 0;
333 idx++;
334 }
335 }
336
337 rcu_read_unlock();
338
339 xen_hvm_modified_memory(start, pages << TARGET_PAGE_BITS);
340 } else {
341 uint8_t clients = tcg_enabled() ? DIRTY_CLIENTS_ALL : DIRTY_CLIENTS_NOCODE;
342
343
344
345
346 for (i = 0; i < len; i++) {
347 if (bitmap[i] != 0) {
348 c = leul_to_cpu(bitmap[i]);
349 do {
350 j = ctzl(c);
351 c &= ~(1ul << j);
352 page_number = (i * HOST_LONG_BITS + j) * hpratio;
353 addr = page_number * TARGET_PAGE_SIZE;
354 ram_addr = start + addr;
355 cpu_physical_memory_set_dirty_range(ram_addr,
356 TARGET_PAGE_SIZE * hpratio, clients);
357 } while (c != 0);
358 }
359 }
360 }
361}
362#endif
363
364bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start,
365 ram_addr_t length,
366 unsigned client);
367
368DirtyBitmapSnapshot *cpu_physical_memory_snapshot_and_clear_dirty
369 (ram_addr_t start, ram_addr_t length, unsigned client);
370
371bool cpu_physical_memory_snapshot_get_dirty(DirtyBitmapSnapshot *snap,
372 ram_addr_t start,
373 ram_addr_t length);
374
375static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
376 ram_addr_t length)
377{
378 cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_MIGRATION);
379 cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_VGA);
380 cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_CODE);
381}
382
383
384static inline
385uint64_t cpu_physical_memory_sync_dirty_bitmap(RAMBlock *rb,
386 ram_addr_t start,
387 ram_addr_t length,
388 uint64_t *real_dirty_pages)
389{
390 ram_addr_t addr;
391 unsigned long word = BIT_WORD((start + rb->offset) >> TARGET_PAGE_BITS);
392 uint64_t num_dirty = 0;
393 unsigned long *dest = rb->bmap;
394
395
396 if (((word * BITS_PER_LONG) << TARGET_PAGE_BITS) ==
397 (start + rb->offset) &&
398 !(length & ((BITS_PER_LONG << TARGET_PAGE_BITS) - 1))) {
399 int k;
400 int nr = BITS_TO_LONGS(length >> TARGET_PAGE_BITS);
401 unsigned long * const *src;
402 unsigned long idx = (word * BITS_PER_LONG) / DIRTY_MEMORY_BLOCK_SIZE;
403 unsigned long offset = BIT_WORD((word * BITS_PER_LONG) %
404 DIRTY_MEMORY_BLOCK_SIZE);
405 unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
406
407 rcu_read_lock();
408
409 src = atomic_rcu_read(
410 &ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION])->blocks;
411
412 for (k = page; k < page + nr; k++) {
413 if (src[idx][offset]) {
414 unsigned long bits = atomic_xchg(&src[idx][offset], 0);
415 unsigned long new_dirty;
416 *real_dirty_pages += ctpopl(bits);
417 new_dirty = ~dest[k];
418 dest[k] |= bits;
419 new_dirty &= bits;
420 num_dirty += ctpopl(new_dirty);
421 }
422
423 if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) {
424 offset = 0;
425 idx++;
426 }
427 }
428
429 rcu_read_unlock();
430 } else {
431 ram_addr_t offset = rb->offset;
432
433 for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) {
434 if (cpu_physical_memory_test_and_clear_dirty(
435 start + addr + offset,
436 TARGET_PAGE_SIZE,
437 DIRTY_MEMORY_MIGRATION)) {
438 *real_dirty_pages += 1;
439 long k = (start + addr) >> TARGET_PAGE_BITS;
440 if (!test_and_set_bit(k, dest)) {
441 num_dirty++;
442 }
443 }
444 }
445 }
446
447 return num_dirty;
448}
449#endif
450#endif
451
