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savevm: Migrate RAM based on name/offset
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1 /*
2  * QEMU System Emulator
3  *
4  * Copyright (c) 2003-2008 Fabrice Bellard
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 #include <stdint.h>
25 #include <stdarg.h>
26 #ifndef _WIN32
27 #include <sys/types.h>
28 #include <sys/mman.h>
29 #endif
30 #include "config.h"
31 #include "monitor.h"
32 #include "sysemu.h"
33 #include "arch_init.h"
34 #include "audio/audio.h"
35 #include "hw/pc.h"
36 #include "hw/pci.h"
37 #include "hw/audiodev.h"
38 #include "kvm.h"
39 #include "migration.h"
40 #include "net.h"
41 #include "gdbstub.h"
42 #include "hw/smbios.h"
43
44 #ifdef TARGET_SPARC
45 int graphic_width = 1024;
46 int graphic_height = 768;
47 int graphic_depth = 8;
48 #else
49 int graphic_width = 800;
50 int graphic_height = 600;
51 int graphic_depth = 15;
52 #endif
53
54 const char arch_config_name[] = CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf";
55
56 #if defined(TARGET_ALPHA)
57 #define QEMU_ARCH QEMU_ARCH_ALPHA
58 #elif defined(TARGET_ARM)
59 #define QEMU_ARCH QEMU_ARCH_ARM
60 #elif defined(TARGET_CRIS)
61 #define QEMU_ARCH QEMU_ARCH_CRIS
62 #elif defined(TARGET_I386)
63 #define QEMU_ARCH QEMU_ARCH_I386
64 #elif defined(TARGET_M68K)
65 #define QEMU_ARCH QEMU_ARCH_M68K
66 #elif defined(TARGET_MICROBLAZE)
67 #define QEMU_ARCH QEMU_ARCH_MICROBLAZE
68 #elif defined(TARGET_MIPS)
69 #define QEMU_ARCH QEMU_ARCH_MIPS
70 #elif defined(TARGET_PPC)
71 #define QEMU_ARCH QEMU_ARCH_PPC
72 #elif defined(TARGET_S390X)
73 #define QEMU_ARCH QEMU_ARCH_S390X
74 #elif defined(TARGET_SH4)
75 #define QEMU_ARCH QEMU_ARCH_SH4
76 #elif defined(TARGET_SPARC)
77 #define QEMU_ARCH QEMU_ARCH_SPARC
78 #endif
79
80 const uint32_t arch_type = QEMU_ARCH;
81
82 /***********************************************************/
83 /* ram save/restore */
84
85 #define RAM_SAVE_FLAG_FULL      0x01 /* Obsolete, not used anymore */
86 #define RAM_SAVE_FLAG_COMPRESS  0x02
87 #define RAM_SAVE_FLAG_MEM_SIZE  0x04
88 #define RAM_SAVE_FLAG_PAGE      0x08
89 #define RAM_SAVE_FLAG_EOS       0x10
90
91 static int is_dup_page(uint8_t *page, uint8_t ch)
92 {
93     uint32_t val = ch << 24 | ch << 16 | ch << 8 | ch;
94     uint32_t *array = (uint32_t *)page;
95     int i;
96
97     for (i = 0; i < (TARGET_PAGE_SIZE / 4); i++) {
98         if (array[i] != val) {
99             return 0;
100         }
101     }
102
103     return 1;
104 }
105
106 static int ram_save_block(QEMUFile *f)
107 {
108     static ram_addr_t current_addr = 0;
109     ram_addr_t saved_addr = current_addr;
110     ram_addr_t addr = 0;
111     uint64_t total_ram = ram_bytes_total();
112     int bytes_sent = 0;
113
114     while (addr < total_ram) {
115         if (cpu_physical_memory_get_dirty(current_addr, MIGRATION_DIRTY_FLAG)) {
116             RAMBlock *block;
117             ram_addr_t offset;
118             uint8_t *p;
119
120             cpu_physical_memory_reset_dirty(current_addr,
121                                             current_addr + TARGET_PAGE_SIZE,
122                                             MIGRATION_DIRTY_FLAG);
123
124             QLIST_FOREACH(block, &ram_list.blocks, next) {
125                 if (current_addr - block->offset < block->length)
126                     break;
127             }
128             offset = current_addr - block->offset;
129             p = block->host + offset;
130
131             if (is_dup_page(p, *p)) {
132                 qemu_put_be64(f, offset | RAM_SAVE_FLAG_COMPRESS);
133                 qemu_put_byte(f, strlen(block->idstr));
134                 qemu_put_buffer(f, (uint8_t *)block->idstr,
135                                 strlen(block->idstr));
136                 qemu_put_byte(f, *p);
137                 bytes_sent = 1;
138             } else {
139                 qemu_put_be64(f, offset | RAM_SAVE_FLAG_PAGE);
140                 qemu_put_byte(f, strlen(block->idstr));
141                 qemu_put_buffer(f, (uint8_t *)block->idstr,
142                                 strlen(block->idstr));
143                 qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
144                 bytes_sent = TARGET_PAGE_SIZE;
145             }
146
147             break;
148         }
149         addr += TARGET_PAGE_SIZE;
150         current_addr = (saved_addr + addr) % total_ram;
151     }
152
153     return bytes_sent;
154 }
155
156 static uint64_t bytes_transferred;
157
158 static ram_addr_t ram_save_remaining(void)
159 {
160     ram_addr_t addr;
161     ram_addr_t count = 0;
162     uint64_t total_ram = ram_bytes_total();
163
164     for (addr = 0; addr < total_ram; addr += TARGET_PAGE_SIZE) {
165         if (cpu_physical_memory_get_dirty(addr, MIGRATION_DIRTY_FLAG)) {
166             count++;
167         }
168     }
169
170     return count;
171 }
172
173 uint64_t ram_bytes_remaining(void)
174 {
175     return ram_save_remaining() * TARGET_PAGE_SIZE;
176 }
177
178 uint64_t ram_bytes_transferred(void)
179 {
180     return bytes_transferred;
181 }
182
183 uint64_t ram_bytes_total(void)
184 {
185     RAMBlock *block;
186     uint64_t total = 0;
187
188     QLIST_FOREACH(block, &ram_list.blocks, next)
189         total += block->length;
190
191     return total;
192 }
193
194 int ram_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque)
195 {
196     ram_addr_t addr;
197     uint64_t bytes_transferred_last;
198     double bwidth = 0;
199     uint64_t expected_time = 0;
200
201     if (stage < 0) {
202         cpu_physical_memory_set_dirty_tracking(0);
203         return 0;
204     }
205
206     if (cpu_physical_sync_dirty_bitmap(0, TARGET_PHYS_ADDR_MAX) != 0) {
207         qemu_file_set_error(f);
208         return 0;
209     }
210
211     if (stage == 1) {
212         RAMBlock *block;
213         uint64_t total_ram = ram_bytes_total();
214         bytes_transferred = 0;
215
216         /* Make sure all dirty bits are set */
217         for (addr = 0; addr < total_ram; addr += TARGET_PAGE_SIZE) {
218             if (!cpu_physical_memory_get_dirty(addr, MIGRATION_DIRTY_FLAG)) {
219                 cpu_physical_memory_set_dirty(addr);
220             }
221         }
222
223         /* Enable dirty memory tracking */
224         cpu_physical_memory_set_dirty_tracking(1);
225
226         qemu_put_be64(f, total_ram | RAM_SAVE_FLAG_MEM_SIZE);
227
228         QLIST_FOREACH(block, &ram_list.blocks, next) {
229             qemu_put_byte(f, strlen(block->idstr));
230             qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
231             qemu_put_be64(f, block->length);
232         }
233     }
234
235     bytes_transferred_last = bytes_transferred;
236     bwidth = qemu_get_clock_ns(rt_clock);
237
238     while (!qemu_file_rate_limit(f)) {
239         int bytes_sent;
240
241         bytes_sent = ram_save_block(f);
242         bytes_transferred += bytes_sent;
243         if (bytes_sent == 0) { /* no more blocks */
244             break;
245         }
246     }
247
248     bwidth = qemu_get_clock_ns(rt_clock) - bwidth;
249     bwidth = (bytes_transferred - bytes_transferred_last) / bwidth;
250
251     /* if we haven't transferred anything this round, force expected_time to a
252      * a very high value, but without crashing */
253     if (bwidth == 0) {
254         bwidth = 0.000001;
255     }
256
257     /* try transferring iterative blocks of memory */
258     if (stage == 3) {
259         int bytes_sent;
260
261         /* flush all remaining blocks regardless of rate limiting */
262         while ((bytes_sent = ram_save_block(f)) != 0) {
263             bytes_transferred += bytes_sent;
264         }
265         cpu_physical_memory_set_dirty_tracking(0);
266     }
267
268     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
269
270     expected_time = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
271
272     return (stage == 2) && (expected_time <= migrate_max_downtime());
273 }
274
275 int ram_load(QEMUFile *f, void *opaque, int version_id)
276 {
277     ram_addr_t addr;
278     int flags;
279
280     if (version_id < 3 || version_id > 4) {
281         return -EINVAL;
282     }
283
284     do {
285         addr = qemu_get_be64(f);
286
287         flags = addr & ~TARGET_PAGE_MASK;
288         addr &= TARGET_PAGE_MASK;
289
290         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
291             if (version_id == 3) {
292                 if (addr != ram_bytes_total()) {
293                     return -EINVAL;
294                 }
295             } else {
296                 /* Synchronize RAM block list */
297                 char id[256];
298                 ram_addr_t length;
299                 ram_addr_t total_ram_bytes = addr;
300
301                 while (total_ram_bytes) {
302                     RAMBlock *block;
303                     uint8_t len;
304
305                     len = qemu_get_byte(f);
306                     qemu_get_buffer(f, (uint8_t *)id, len);
307                     id[len] = 0;
308                     length = qemu_get_be64(f);
309
310                     QLIST_FOREACH(block, &ram_list.blocks, next) {
311                         if (!strncmp(id, block->idstr, sizeof(id))) {
312                             if (block->length != length)
313                                 return -EINVAL;
314                             break;
315                         }
316                     }
317
318                     if (!block) {
319                         if (!qemu_ram_alloc(NULL, id, length))
320                             return -ENOMEM;
321                     }
322
323                     total_ram_bytes -= length;
324                 }
325             }
326         }
327
328         if (flags & RAM_SAVE_FLAG_COMPRESS) {
329             void *host;
330             uint8_t ch;
331
332             if (version_id == 3) {
333                 host = qemu_get_ram_ptr(addr);
334             } else {
335                 RAMBlock *block;
336                 char id[256];
337                 uint8_t len;
338
339                 len = qemu_get_byte(f);
340                 qemu_get_buffer(f, (uint8_t *)id, len);
341                 id[len] = 0;
342
343                 QLIST_FOREACH(block, &ram_list.blocks, next) {
344                     if (!strncmp(id, block->idstr, sizeof(id)))
345                         break;
346                 }
347                 if (!block)
348                     return -EINVAL;
349
350                 host = block->host + addr;
351             }
352             ch = qemu_get_byte(f);
353             memset(host, ch, TARGET_PAGE_SIZE);
354 #ifndef _WIN32
355             if (ch == 0 &&
356                 (!kvm_enabled() || kvm_has_sync_mmu())) {
357                 madvise(host, TARGET_PAGE_SIZE, MADV_DONTNEED);
358             }
359 #endif
360         } else if (flags & RAM_SAVE_FLAG_PAGE) {
361             void *host;
362
363             if (version_id == 3) {
364                 host = qemu_get_ram_ptr(addr);
365             } else {
366                 RAMBlock *block;
367                 char id[256];
368                 uint8_t len;
369
370                 len = qemu_get_byte(f);
371                 qemu_get_buffer(f, (uint8_t *)id, len);
372                 id[len] = 0;
373
374                 QLIST_FOREACH(block, &ram_list.blocks, next) {
375                     if (!strncmp(id, block->idstr, sizeof(id)))
376                         break;
377                 }
378                 if (!block)
379                     return -EINVAL;
380
381                 host = block->host + addr;
382             }
383             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
384         }
385         if (qemu_file_has_error(f)) {
386             return -EIO;
387         }
388     } while (!(flags & RAM_SAVE_FLAG_EOS));
389
390     return 0;
391 }
392
393 void qemu_service_io(void)
394 {
395     qemu_notify_event();
396 }
397
398 #ifdef HAS_AUDIO
399 struct soundhw soundhw[] = {
400 #ifdef HAS_AUDIO_CHOICE
401 #if defined(TARGET_I386) || defined(TARGET_MIPS)
402     {
403         "pcspk",
404         "PC speaker",
405         0,
406         1,
407         { .init_isa = pcspk_audio_init }
408     },
409 #endif
410
411 #ifdef CONFIG_SB16
412     {
413         "sb16",
414         "Creative Sound Blaster 16",
415         0,
416         1,
417         { .init_isa = SB16_init }
418     },
419 #endif
420
421 #ifdef CONFIG_CS4231A
422     {
423         "cs4231a",
424         "CS4231A",
425         0,
426         1,
427         { .init_isa = cs4231a_init }
428     },
429 #endif
430
431 #ifdef CONFIG_ADLIB
432     {
433         "adlib",
434 #ifdef HAS_YMF262
435         "Yamaha YMF262 (OPL3)",
436 #else
437         "Yamaha YM3812 (OPL2)",
438 #endif
439         0,
440         1,
441         { .init_isa = Adlib_init }
442     },
443 #endif
444
445 #ifdef CONFIG_GUS
446     {
447         "gus",
448         "Gravis Ultrasound GF1",
449         0,
450         1,
451         { .init_isa = GUS_init }
452     },
453 #endif
454
455 #ifdef CONFIG_AC97
456     {
457         "ac97",
458         "Intel 82801AA AC97 Audio",
459         0,
460         0,
461         { .init_pci = ac97_init }
462     },
463 #endif
464
465 #ifdef CONFIG_ES1370
466     {
467         "es1370",
468         "ENSONIQ AudioPCI ES1370",
469         0,
470         0,
471         { .init_pci = es1370_init }
472     },
473 #endif
474
475 #endif /* HAS_AUDIO_CHOICE */
476
477     { NULL, NULL, 0, 0, { NULL } }
478 };
479
480 void select_soundhw(const char *optarg)
481 {
482     struct soundhw *c;
483
484     if (*optarg == '?') {
485     show_valid_cards:
486
487         printf("Valid sound card names (comma separated):\n");
488         for (c = soundhw; c->name; ++c) {
489             printf ("%-11s %s\n", c->name, c->descr);
490         }
491         printf("\n-soundhw all will enable all of the above\n");
492         exit(*optarg != '?');
493     }
494     else {
495         size_t l;
496         const char *p;
497         char *e;
498         int bad_card = 0;
499
500         if (!strcmp(optarg, "all")) {
501             for (c = soundhw; c->name; ++c) {
502                 c->enabled = 1;
503             }
504             return;
505         }
506
507         p = optarg;
508         while (*p) {
509             e = strchr(p, ',');
510             l = !e ? strlen(p) : (size_t) (e - p);
511
512             for (c = soundhw; c->name; ++c) {
513                 if (!strncmp(c->name, p, l) && !c->name[l]) {
514                     c->enabled = 1;
515                     break;
516                 }
517             }
518
519             if (!c->name) {
520                 if (l > 80) {
521                     fprintf(stderr,
522                             "Unknown sound card name (too big to show)\n");
523                 }
524                 else {
525                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
526                             (int) l, p);
527                 }
528                 bad_card = 1;
529             }
530             p += l + (e != NULL);
531         }
532
533         if (bad_card) {
534             goto show_valid_cards;
535         }
536     }
537 }
538 #else
539 void select_soundhw(const char *optarg)
540 {
541 }
542 #endif
543
544 int qemu_uuid_parse(const char *str, uint8_t *uuid)
545 {
546     int ret;
547
548     if (strlen(str) != 36) {
549         return -1;
550     }
551
552     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
553                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
554                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
555                  &uuid[15]);
556
557     if (ret != 16) {
558         return -1;
559     }
560 #ifdef TARGET_I386
561     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);
562 #endif
563     return 0;
564 }
565
566 void do_acpitable_option(const char *optarg)
567 {
568 #ifdef TARGET_I386
569     if (acpi_table_add(optarg) < 0) {
570         fprintf(stderr, "Wrong acpi table provided\n");
571         exit(1);
572     }
573 #endif
574 }
575
576 void do_smbios_option(const char *optarg)
577 {
578 #ifdef TARGET_I386
579     if (smbios_entry_add(optarg) < 0) {
580         fprintf(stderr, "Wrong smbios provided\n");
581         exit(1);
582     }
583 #endif
584 }
585
586 void cpudef_init(void)
587 {
588 #if defined(cpudef_setup)
589     cpudef_setup(); /* parse cpu definitions in target config file */
590 #endif
591 }
592
593 int audio_available(void)
594 {
595 #ifdef HAS_AUDIO
596     return 1;
597 #else
598     return 0;
599 #endif
600 }
601
602 int kvm_available(void)
603 {
604 #ifdef CONFIG_KVM
605     return 1;
606 #else
607     return 0;
608 #endif
609 }
610
611 int xen_available(void)
612 {
613 #ifdef CONFIG_XEN
614     return 1;
615 #else
616     return 0;
617 #endif
618 }
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