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exec: change some APIs to take AddressSpaceDispatch
[mirror_qemu.git] / exec.c
1 /*
2 * Virtual page mapping
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19 #include "config.h"
20 #ifdef _WIN32
21 #include <windows.h>
22 #else
23 #include <sys/types.h>
24 #include <sys/mman.h>
25 #endif
26
27 #include "qemu-common.h"
28 #include "cpu.h"
29 #include "tcg.h"
30 #include "hw/hw.h"
31 #include "hw/qdev.h"
32 #include "qemu/osdep.h"
33 #include "sysemu/kvm.h"
34 #include "hw/xen/xen.h"
35 #include "qemu/timer.h"
36 #include "qemu/config-file.h"
37 #include "exec/memory.h"
38 #include "sysemu/dma.h"
39 #include "exec/address-spaces.h"
40 #if defined(CONFIG_USER_ONLY)
41 #include <qemu.h>
42 #else /* !CONFIG_USER_ONLY */
43 #include "sysemu/xen-mapcache.h"
44 #include "trace.h"
45 #endif
46 #include "exec/cpu-all.h"
47
48 #include "exec/cputlb.h"
49 #include "translate-all.h"
50
51 #include "exec/memory-internal.h"
52
53 //#define DEBUG_SUBPAGE
54
55 #if !defined(CONFIG_USER_ONLY)
56 int phys_ram_fd;
57 static int in_migration;
58
59 RAMList ram_list = { .blocks = QTAILQ_HEAD_INITIALIZER(ram_list.blocks) };
60
61 static MemoryRegion *system_memory;
62 static MemoryRegion *system_io;
63
64 AddressSpace address_space_io;
65 AddressSpace address_space_memory;
66
67 MemoryRegion io_mem_rom, io_mem_notdirty;
68 static MemoryRegion io_mem_unassigned;
69
70 #endif
71
72 CPUArchState *first_cpu;
73 /* current CPU in the current thread. It is only valid inside
74 cpu_exec() */
75 DEFINE_TLS(CPUArchState *,cpu_single_env);
76 /* 0 = Do not count executed instructions.
77 1 = Precise instruction counting.
78 2 = Adaptive rate instruction counting. */
79 int use_icount;
80
81 #if !defined(CONFIG_USER_ONLY)
82
83 typedef struct PhysPageEntry PhysPageEntry;
84
85 struct PhysPageEntry {
86 uint16_t is_leaf : 1;
87 /* index into phys_sections (is_leaf) or phys_map_nodes (!is_leaf) */
88 uint16_t ptr : 15;
89 };
90
91 typedef PhysPageEntry Node[L2_SIZE];
92
93 struct AddressSpaceDispatch {
94 /* This is a multi-level map on the physical address space.
95 * The bottom level has pointers to MemoryRegionSections.
96 */
97 PhysPageEntry phys_map;
98 Node *nodes;
99 MemoryRegionSection *sections;
100 AddressSpace *as;
101 };
102
103 #define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK)
104 typedef struct subpage_t {
105 MemoryRegion iomem;
106 AddressSpace *as;
107 hwaddr base;
108 uint16_t sub_section[TARGET_PAGE_SIZE];
109 } subpage_t;
110
111 #define PHYS_SECTION_UNASSIGNED 0
112 #define PHYS_SECTION_NOTDIRTY 1
113 #define PHYS_SECTION_ROM 2
114 #define PHYS_SECTION_WATCH 3
115
116 typedef struct PhysPageMap {
117 unsigned sections_nb;
118 unsigned sections_nb_alloc;
119 unsigned nodes_nb;
120 unsigned nodes_nb_alloc;
121 Node *nodes;
122 MemoryRegionSection *sections;
123 } PhysPageMap;
124
125 static PhysPageMap *prev_map;
126 static PhysPageMap next_map;
127
128 #define PHYS_MAP_NODE_NIL (((uint16_t)~0) >> 1)
129
130 static void io_mem_init(void);
131 static void memory_map_init(void);
132 static void *qemu_safe_ram_ptr(ram_addr_t addr);
133
134 static MemoryRegion io_mem_watch;
135 #endif
136
137 #if !defined(CONFIG_USER_ONLY)
138
139 static void phys_map_node_reserve(unsigned nodes)
140 {
141 if (next_map.nodes_nb + nodes > next_map.nodes_nb_alloc) {
142 next_map.nodes_nb_alloc = MAX(next_map.nodes_nb_alloc * 2,
143 16);
144 next_map.nodes_nb_alloc = MAX(next_map.nodes_nb_alloc,
145 next_map.nodes_nb + nodes);
146 next_map.nodes = g_renew(Node, next_map.nodes,
147 next_map.nodes_nb_alloc);
148 }
149 }
150
151 static uint16_t phys_map_node_alloc(void)
152 {
153 unsigned i;
154 uint16_t ret;
155
156 ret = next_map.nodes_nb++;
157 assert(ret != PHYS_MAP_NODE_NIL);
158 assert(ret != next_map.nodes_nb_alloc);
159 for (i = 0; i < L2_SIZE; ++i) {
160 next_map.nodes[ret][i].is_leaf = 0;
161 next_map.nodes[ret][i].ptr = PHYS_MAP_NODE_NIL;
162 }
163 return ret;
164 }
165
166 static void phys_page_set_level(PhysPageEntry *lp, hwaddr *index,
167 hwaddr *nb, uint16_t leaf,
168 int level)
169 {
170 PhysPageEntry *p;
171 int i;
172 hwaddr step = (hwaddr)1 << (level * L2_BITS);
173
174 if (!lp->is_leaf && lp->ptr == PHYS_MAP_NODE_NIL) {
175 lp->ptr = phys_map_node_alloc();
176 p = next_map.nodes[lp->ptr];
177 if (level == 0) {
178 for (i = 0; i < L2_SIZE; i++) {
179 p[i].is_leaf = 1;
180 p[i].ptr = PHYS_SECTION_UNASSIGNED;
181 }
182 }
183 } else {
184 p = next_map.nodes[lp->ptr];
185 }
186 lp = &p[(*index >> (level * L2_BITS)) & (L2_SIZE - 1)];
187
188 while (*nb && lp < &p[L2_SIZE]) {
189 if ((*index & (step - 1)) == 0 && *nb >= step) {
190 lp->is_leaf = true;
191 lp->ptr = leaf;
192 *index += step;
193 *nb -= step;
194 } else {
195 phys_page_set_level(lp, index, nb, leaf, level - 1);
196 }
197 ++lp;
198 }
199 }
200
201 static void phys_page_set(AddressSpaceDispatch *d,
202 hwaddr index, hwaddr nb,
203 uint16_t leaf)
204 {
205 /* Wildly overreserve - it doesn't matter much. */
206 phys_map_node_reserve(3 * P_L2_LEVELS);
207
208 phys_page_set_level(&d->phys_map, &index, &nb, leaf, P_L2_LEVELS - 1);
209 }
210
211 static MemoryRegionSection *phys_page_find(PhysPageEntry lp, hwaddr index,
212 Node *nodes, MemoryRegionSection *sections)
213 {
214 PhysPageEntry *p;
215 int i;
216
217 for (i = P_L2_LEVELS - 1; i >= 0 && !lp.is_leaf; i--) {
218 if (lp.ptr == PHYS_MAP_NODE_NIL) {
219 return &sections[PHYS_SECTION_UNASSIGNED];
220 }
221 p = nodes[lp.ptr];
222 lp = p[(index >> (i * L2_BITS)) & (L2_SIZE - 1)];
223 }
224 return &sections[lp.ptr];
225 }
226
227 bool memory_region_is_unassigned(MemoryRegion *mr)
228 {
229 return mr != &io_mem_rom && mr != &io_mem_notdirty && !mr->rom_device
230 && mr != &io_mem_watch;
231 }
232
233 static MemoryRegionSection *address_space_lookup_region(AddressSpaceDispatch *d,
234 hwaddr addr,
235 bool resolve_subpage)
236 {
237 MemoryRegionSection *section;
238 subpage_t *subpage;
239
240 section = phys_page_find(d->phys_map, addr >> TARGET_PAGE_BITS,
241 d->nodes, d->sections);
242 if (resolve_subpage && section->mr->subpage) {
243 subpage = container_of(section->mr, subpage_t, iomem);
244 section = &d->sections[subpage->sub_section[SUBPAGE_IDX(addr)]];
245 }
246 return section;
247 }
248
249 static MemoryRegionSection *
250 address_space_translate_internal(AddressSpaceDispatch *d, hwaddr addr, hwaddr *xlat,
251 hwaddr *plen, bool resolve_subpage)
252 {
253 MemoryRegionSection *section;
254 Int128 diff;
255
256 section = address_space_lookup_region(d, addr, resolve_subpage);
257 /* Compute offset within MemoryRegionSection */
258 addr -= section->offset_within_address_space;
259
260 /* Compute offset within MemoryRegion */
261 *xlat = addr + section->offset_within_region;
262
263 diff = int128_sub(section->mr->size, int128_make64(addr));
264 *plen = int128_get64(int128_min(diff, int128_make64(*plen)));
265 return section;
266 }
267
268 MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr,
269 hwaddr *xlat, hwaddr *plen,
270 bool is_write)
271 {
272 IOMMUTLBEntry iotlb;
273 MemoryRegionSection *section;
274 MemoryRegion *mr;
275 hwaddr len = *plen;
276
277 for (;;) {
278 section = address_space_translate_internal(as->dispatch, addr, &addr, plen, true);
279 mr = section->mr;
280
281 if (!mr->iommu_ops) {
282 break;
283 }
284
285 iotlb = mr->iommu_ops->translate(mr, addr);
286 addr = ((iotlb.translated_addr & ~iotlb.addr_mask)
287 | (addr & iotlb.addr_mask));
288 len = MIN(len, (addr | iotlb.addr_mask) - addr + 1);
289 if (!(iotlb.perm & (1 << is_write))) {
290 mr = &io_mem_unassigned;
291 break;
292 }
293
294 as = iotlb.target_as;
295 }
296
297 *plen = len;
298 *xlat = addr;
299 return mr;
300 }
301
302 MemoryRegionSection *
303 address_space_translate_for_iotlb(AddressSpace *as, hwaddr addr, hwaddr *xlat,
304 hwaddr *plen)
305 {
306 MemoryRegionSection *section;
307 section = address_space_translate_internal(as->dispatch, addr, xlat, plen, false);
308
309 assert(!section->mr->iommu_ops);
310 return section;
311 }
312 #endif
313
314 void cpu_exec_init_all(void)
315 {
316 #if !defined(CONFIG_USER_ONLY)
317 qemu_mutex_init(&ram_list.mutex);
318 memory_map_init();
319 io_mem_init();
320 #endif
321 }
322
323 #if !defined(CONFIG_USER_ONLY)
324
325 static int cpu_common_post_load(void *opaque, int version_id)
326 {
327 CPUState *cpu = opaque;
328
329 /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
330 version_id is increased. */
331 cpu->interrupt_request &= ~0x01;
332 tlb_flush(cpu->env_ptr, 1);
333
334 return 0;
335 }
336
337 const VMStateDescription vmstate_cpu_common = {
338 .name = "cpu_common",
339 .version_id = 1,
340 .minimum_version_id = 1,
341 .minimum_version_id_old = 1,
342 .post_load = cpu_common_post_load,
343 .fields = (VMStateField []) {
344 VMSTATE_UINT32(halted, CPUState),
345 VMSTATE_UINT32(interrupt_request, CPUState),
346 VMSTATE_END_OF_LIST()
347 }
348 };
349
350 #endif
351
352 CPUState *qemu_get_cpu(int index)
353 {
354 CPUArchState *env = first_cpu;
355 CPUState *cpu = NULL;
356
357 while (env) {
358 cpu = ENV_GET_CPU(env);
359 if (cpu->cpu_index == index) {
360 break;
361 }
362 env = env->next_cpu;
363 }
364
365 return env ? cpu : NULL;
366 }
367
368 void qemu_for_each_cpu(void (*func)(CPUState *cpu, void *data), void *data)
369 {
370 CPUArchState *env = first_cpu;
371
372 while (env) {
373 func(ENV_GET_CPU(env), data);
374 env = env->next_cpu;
375 }
376 }
377
378 void cpu_exec_init(CPUArchState *env)
379 {
380 CPUState *cpu = ENV_GET_CPU(env);
381 CPUClass *cc = CPU_GET_CLASS(cpu);
382 CPUArchState **penv;
383 int cpu_index;
384
385 #if defined(CONFIG_USER_ONLY)
386 cpu_list_lock();
387 #endif
388 env->next_cpu = NULL;
389 penv = &first_cpu;
390 cpu_index = 0;
391 while (*penv != NULL) {
392 penv = &(*penv)->next_cpu;
393 cpu_index++;
394 }
395 cpu->cpu_index = cpu_index;
396 cpu->numa_node = 0;
397 QTAILQ_INIT(&env->breakpoints);
398 QTAILQ_INIT(&env->watchpoints);
399 #ifndef CONFIG_USER_ONLY
400 cpu->thread_id = qemu_get_thread_id();
401 #endif
402 *penv = env;
403 #if defined(CONFIG_USER_ONLY)
404 cpu_list_unlock();
405 #endif
406 vmstate_register(NULL, cpu_index, &vmstate_cpu_common, cpu);
407 #if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
408 register_savevm(NULL, "cpu", cpu_index, CPU_SAVE_VERSION,
409 cpu_save, cpu_load, env);
410 assert(cc->vmsd == NULL);
411 #endif
412 if (cc->vmsd != NULL) {
413 vmstate_register(NULL, cpu_index, cc->vmsd, cpu);
414 }
415 }
416
417 #if defined(TARGET_HAS_ICE)
418 #if defined(CONFIG_USER_ONLY)
419 static void breakpoint_invalidate(CPUArchState *env, target_ulong pc)
420 {
421 tb_invalidate_phys_page_range(pc, pc + 1, 0);
422 }
423 #else
424 static void breakpoint_invalidate(CPUArchState *env, target_ulong pc)
425 {
426 tb_invalidate_phys_addr(cpu_get_phys_page_debug(env, pc) |
427 (pc & ~TARGET_PAGE_MASK));
428 }
429 #endif
430 #endif /* TARGET_HAS_ICE */
431
432 #if defined(CONFIG_USER_ONLY)
433 void cpu_watchpoint_remove_all(CPUArchState *env, int mask)
434
435 {
436 }
437
438 int cpu_watchpoint_insert(CPUArchState *env, target_ulong addr, target_ulong len,
439 int flags, CPUWatchpoint **watchpoint)
440 {
441 return -ENOSYS;
442 }
443 #else
444 /* Add a watchpoint. */
445 int cpu_watchpoint_insert(CPUArchState *env, target_ulong addr, target_ulong len,
446 int flags, CPUWatchpoint **watchpoint)
447 {
448 target_ulong len_mask = ~(len - 1);
449 CPUWatchpoint *wp;
450
451 /* sanity checks: allow power-of-2 lengths, deny unaligned watchpoints */
452 if ((len & (len - 1)) || (addr & ~len_mask) ||
453 len == 0 || len > TARGET_PAGE_SIZE) {
454 fprintf(stderr, "qemu: tried to set invalid watchpoint at "
455 TARGET_FMT_lx ", len=" TARGET_FMT_lu "\n", addr, len);
456 return -EINVAL;
457 }
458 wp = g_malloc(sizeof(*wp));
459
460 wp->vaddr = addr;
461 wp->len_mask = len_mask;
462 wp->flags = flags;
463
464 /* keep all GDB-injected watchpoints in front */
465 if (flags & BP_GDB)
466 QTAILQ_INSERT_HEAD(&env->watchpoints, wp, entry);
467 else
468 QTAILQ_INSERT_TAIL(&env->watchpoints, wp, entry);
469
470 tlb_flush_page(env, addr);
471
472 if (watchpoint)
473 *watchpoint = wp;
474 return 0;
475 }
476
477 /* Remove a specific watchpoint. */
478 int cpu_watchpoint_remove(CPUArchState *env, target_ulong addr, target_ulong len,
479 int flags)
480 {
481 target_ulong len_mask = ~(len - 1);
482 CPUWatchpoint *wp;
483
484 QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
485 if (addr == wp->vaddr && len_mask == wp->len_mask
486 && flags == (wp->flags & ~BP_WATCHPOINT_HIT)) {
487 cpu_watchpoint_remove_by_ref(env, wp);
488 return 0;
489 }
490 }
491 return -ENOENT;
492 }
493
494 /* Remove a specific watchpoint by reference. */
495 void cpu_watchpoint_remove_by_ref(CPUArchState *env, CPUWatchpoint *watchpoint)
496 {
497 QTAILQ_REMOVE(&env->watchpoints, watchpoint, entry);
498
499 tlb_flush_page(env, watchpoint->vaddr);
500
501 g_free(watchpoint);
502 }
503
504 /* Remove all matching watchpoints. */
505 void cpu_watchpoint_remove_all(CPUArchState *env, int mask)
506 {
507 CPUWatchpoint *wp, *next;
508
509 QTAILQ_FOREACH_SAFE(wp, &env->watchpoints, entry, next) {
510 if (wp->flags & mask)
511 cpu_watchpoint_remove_by_ref(env, wp);
512 }
513 }
514 #endif
515
516 /* Add a breakpoint. */
517 int cpu_breakpoint_insert(CPUArchState *env, target_ulong pc, int flags,
518 CPUBreakpoint **breakpoint)
519 {
520 #if defined(TARGET_HAS_ICE)
521 CPUBreakpoint *bp;
522
523 bp = g_malloc(sizeof(*bp));
524
525 bp->pc = pc;
526 bp->flags = flags;
527
528 /* keep all GDB-injected breakpoints in front */
529 if (flags & BP_GDB)
530 QTAILQ_INSERT_HEAD(&env->breakpoints, bp, entry);
531 else
532 QTAILQ_INSERT_TAIL(&env->breakpoints, bp, entry);
533
534 breakpoint_invalidate(env, pc);
535
536 if (breakpoint)
537 *breakpoint = bp;
538 return 0;
539 #else
540 return -ENOSYS;
541 #endif
542 }
543
544 /* Remove a specific breakpoint. */
545 int cpu_breakpoint_remove(CPUArchState *env, target_ulong pc, int flags)
546 {
547 #if defined(TARGET_HAS_ICE)
548 CPUBreakpoint *bp;
549
550 QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
551 if (bp->pc == pc && bp->flags == flags) {
552 cpu_breakpoint_remove_by_ref(env, bp);
553 return 0;
554 }
555 }
556 return -ENOENT;
557 #else
558 return -ENOSYS;
559 #endif
560 }
561
562 /* Remove a specific breakpoint by reference. */
563 void cpu_breakpoint_remove_by_ref(CPUArchState *env, CPUBreakpoint *breakpoint)
564 {
565 #if defined(TARGET_HAS_ICE)
566 QTAILQ_REMOVE(&env->breakpoints, breakpoint, entry);
567
568 breakpoint_invalidate(env, breakpoint->pc);
569
570 g_free(breakpoint);
571 #endif
572 }
573
574 /* Remove all matching breakpoints. */
575 void cpu_breakpoint_remove_all(CPUArchState *env, int mask)
576 {
577 #if defined(TARGET_HAS_ICE)
578 CPUBreakpoint *bp, *next;
579
580 QTAILQ_FOREACH_SAFE(bp, &env->breakpoints, entry, next) {
581 if (bp->flags & mask)
582 cpu_breakpoint_remove_by_ref(env, bp);
583 }
584 #endif
585 }
586
587 /* enable or disable single step mode. EXCP_DEBUG is returned by the
588 CPU loop after each instruction */
589 void cpu_single_step(CPUArchState *env, int enabled)
590 {
591 #if defined(TARGET_HAS_ICE)
592 if (env->singlestep_enabled != enabled) {
593 env->singlestep_enabled = enabled;
594 if (kvm_enabled())
595 kvm_update_guest_debug(env, 0);
596 else {
597 /* must flush all the translated code to avoid inconsistencies */
598 /* XXX: only flush what is necessary */
599 tb_flush(env);
600 }
601 }
602 #endif
603 }
604
605 void cpu_abort(CPUArchState *env, const char *fmt, ...)
606 {
607 CPUState *cpu = ENV_GET_CPU(env);
608 va_list ap;
609 va_list ap2;
610
611 va_start(ap, fmt);
612 va_copy(ap2, ap);
613 fprintf(stderr, "qemu: fatal: ");
614 vfprintf(stderr, fmt, ap);
615 fprintf(stderr, "\n");
616 cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_FPU | CPU_DUMP_CCOP);
617 if (qemu_log_enabled()) {
618 qemu_log("qemu: fatal: ");
619 qemu_log_vprintf(fmt, ap2);
620 qemu_log("\n");
621 log_cpu_state(env, CPU_DUMP_FPU | CPU_DUMP_CCOP);
622 qemu_log_flush();
623 qemu_log_close();
624 }
625 va_end(ap2);
626 va_end(ap);
627 #if defined(CONFIG_USER_ONLY)
628 {
629 struct sigaction act;
630 sigfillset(&act.sa_mask);
631 act.sa_handler = SIG_DFL;
632 sigaction(SIGABRT, &act, NULL);
633 }
634 #endif
635 abort();
636 }
637
638 CPUArchState *cpu_copy(CPUArchState *env)
639 {
640 CPUArchState *new_env = cpu_init(env->cpu_model_str);
641 CPUArchState *next_cpu = new_env->next_cpu;
642 #if defined(TARGET_HAS_ICE)
643 CPUBreakpoint *bp;
644 CPUWatchpoint *wp;
645 #endif
646
647 memcpy(new_env, env, sizeof(CPUArchState));
648
649 /* Preserve chaining. */
650 new_env->next_cpu = next_cpu;
651
652 /* Clone all break/watchpoints.
653 Note: Once we support ptrace with hw-debug register access, make sure
654 BP_CPU break/watchpoints are handled correctly on clone. */
655 QTAILQ_INIT(&env->breakpoints);
656 QTAILQ_INIT(&env->watchpoints);
657 #if defined(TARGET_HAS_ICE)
658 QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
659 cpu_breakpoint_insert(new_env, bp->pc, bp->flags, NULL);
660 }
661 QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
662 cpu_watchpoint_insert(new_env, wp->vaddr, (~wp->len_mask) + 1,
663 wp->flags, NULL);
664 }
665 #endif
666
667 return new_env;
668 }
669
670 #if !defined(CONFIG_USER_ONLY)
671 static void tlb_reset_dirty_range_all(ram_addr_t start, ram_addr_t end,
672 uintptr_t length)
673 {
674 uintptr_t start1;
675
676 /* we modify the TLB cache so that the dirty bit will be set again
677 when accessing the range */
678 start1 = (uintptr_t)qemu_safe_ram_ptr(start);
679 /* Check that we don't span multiple blocks - this breaks the
680 address comparisons below. */
681 if ((uintptr_t)qemu_safe_ram_ptr(end - 1) - start1
682 != (end - 1) - start) {
683 abort();
684 }
685 cpu_tlb_reset_dirty_all(start1, length);
686
687 }
688
689 /* Note: start and end must be within the same ram block. */
690 void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
691 int dirty_flags)
692 {
693 uintptr_t length;
694
695 start &= TARGET_PAGE_MASK;
696 end = TARGET_PAGE_ALIGN(end);
697
698 length = end - start;
699 if (length == 0)
700 return;
701 cpu_physical_memory_mask_dirty_range(start, length, dirty_flags);
702
703 if (tcg_enabled()) {
704 tlb_reset_dirty_range_all(start, end, length);
705 }
706 }
707
708 static int cpu_physical_memory_set_dirty_tracking(int enable)
709 {
710 int ret = 0;
711 in_migration = enable;
712 return ret;
713 }
714
715 hwaddr memory_region_section_get_iotlb(CPUArchState *env,
716 MemoryRegionSection *section,
717 target_ulong vaddr,
718 hwaddr paddr, hwaddr xlat,
719 int prot,
720 target_ulong *address)
721 {
722 hwaddr iotlb;
723 CPUWatchpoint *wp;
724
725 if (memory_region_is_ram(section->mr)) {
726 /* Normal RAM. */
727 iotlb = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK)
728 + xlat;
729 if (!section->readonly) {
730 iotlb |= PHYS_SECTION_NOTDIRTY;
731 } else {
732 iotlb |= PHYS_SECTION_ROM;
733 }
734 } else {
735 iotlb = section - address_space_memory.dispatch->sections;
736 iotlb += xlat;
737 }
738
739 /* Make accesses to pages with watchpoints go via the
740 watchpoint trap routines. */
741 QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
742 if (vaddr == (wp->vaddr & TARGET_PAGE_MASK)) {
743 /* Avoid trapping reads of pages with a write breakpoint. */
744 if ((prot & PAGE_WRITE) || (wp->flags & BP_MEM_READ)) {
745 iotlb = PHYS_SECTION_WATCH + paddr;
746 *address |= TLB_MMIO;
747 break;
748 }
749 }
750 }
751
752 return iotlb;
753 }
754 #endif /* defined(CONFIG_USER_ONLY) */
755
756 #if !defined(CONFIG_USER_ONLY)
757
758 static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
759 uint16_t section);
760 static subpage_t *subpage_init(AddressSpace *as, hwaddr base);
761
762 static uint16_t phys_section_add(MemoryRegionSection *section)
763 {
764 /* The physical section number is ORed with a page-aligned
765 * pointer to produce the iotlb entries. Thus it should
766 * never overflow into the page-aligned value.
767 */
768 assert(next_map.sections_nb < TARGET_PAGE_SIZE);
769
770 if (next_map.sections_nb == next_map.sections_nb_alloc) {
771 next_map.sections_nb_alloc = MAX(next_map.sections_nb_alloc * 2,
772 16);
773 next_map.sections = g_renew(MemoryRegionSection, next_map.sections,
774 next_map.sections_nb_alloc);
775 }
776 next_map.sections[next_map.sections_nb] = *section;
777 memory_region_ref(section->mr);
778 return next_map.sections_nb++;
779 }
780
781 static void phys_section_destroy(MemoryRegion *mr)
782 {
783 memory_region_unref(mr);
784
785 if (mr->subpage) {
786 subpage_t *subpage = container_of(mr, subpage_t, iomem);
787 memory_region_destroy(&subpage->iomem);
788 g_free(subpage);
789 }
790 }
791
792 static void phys_sections_free(PhysPageMap *map)
793 {
794 while (map->sections_nb > 0) {
795 MemoryRegionSection *section = &map->sections[--map->sections_nb];
796 phys_section_destroy(section->mr);
797 }
798 g_free(map->sections);
799 g_free(map->nodes);
800 g_free(map);
801 }
802
803 static void register_subpage(AddressSpaceDispatch *d, MemoryRegionSection *section)
804 {
805 subpage_t *subpage;
806 hwaddr base = section->offset_within_address_space
807 & TARGET_PAGE_MASK;
808 MemoryRegionSection *existing = phys_page_find(d->phys_map, base >> TARGET_PAGE_BITS,
809 next_map.nodes, next_map.sections);
810 MemoryRegionSection subsection = {
811 .offset_within_address_space = base,
812 .size = int128_make64(TARGET_PAGE_SIZE),
813 };
814 hwaddr start, end;
815
816 assert(existing->mr->subpage || existing->mr == &io_mem_unassigned);
817
818 if (!(existing->mr->subpage)) {
819 subpage = subpage_init(d->as, base);
820 subsection.mr = &subpage->iomem;
821 phys_page_set(d, base >> TARGET_PAGE_BITS, 1,
822 phys_section_add(&subsection));
823 } else {
824 subpage = container_of(existing->mr, subpage_t, iomem);
825 }
826 start = section->offset_within_address_space & ~TARGET_PAGE_MASK;
827 end = start + int128_get64(section->size) - 1;
828 subpage_register(subpage, start, end, phys_section_add(section));
829 }
830
831
832 static void register_multipage(AddressSpaceDispatch *d,
833 MemoryRegionSection *section)
834 {
835 hwaddr start_addr = section->offset_within_address_space;
836 uint16_t section_index = phys_section_add(section);
837 uint64_t num_pages = int128_get64(int128_rshift(section->size,
838 TARGET_PAGE_BITS));
839
840 assert(num_pages);
841 phys_page_set(d, start_addr >> TARGET_PAGE_BITS, num_pages, section_index);
842 }
843
844 static void mem_add(MemoryListener *listener, MemoryRegionSection *section)
845 {
846 AddressSpace *as = container_of(listener, AddressSpace, dispatch_listener);
847 AddressSpaceDispatch *d = as->next_dispatch;
848 MemoryRegionSection now = *section, remain = *section;
849 Int128 page_size = int128_make64(TARGET_PAGE_SIZE);
850
851 if (now.offset_within_address_space & ~TARGET_PAGE_MASK) {
852 uint64_t left = TARGET_PAGE_ALIGN(now.offset_within_address_space)
853 - now.offset_within_address_space;
854
855 now.size = int128_min(int128_make64(left), now.size);
856 register_subpage(d, &now);
857 } else {
858 now.size = int128_zero();
859 }
860 while (int128_ne(remain.size, now.size)) {
861 remain.size = int128_sub(remain.size, now.size);
862 remain.offset_within_address_space += int128_get64(now.size);
863 remain.offset_within_region += int128_get64(now.size);
864 now = remain;
865 if (int128_lt(remain.size, page_size)) {
866 register_subpage(d, &now);
867 } else if (remain.offset_within_region & ~TARGET_PAGE_MASK) {
868 now.size = page_size;
869 register_subpage(d, &now);
870 } else {
871 now.size = int128_and(now.size, int128_neg(page_size));
872 register_multipage(d, &now);
873 }
874 }
875 }
876
877 void qemu_flush_coalesced_mmio_buffer(void)
878 {
879 if (kvm_enabled())
880 kvm_flush_coalesced_mmio_buffer();
881 }
882
883 void qemu_mutex_lock_ramlist(void)
884 {
885 qemu_mutex_lock(&ram_list.mutex);
886 }
887
888 void qemu_mutex_unlock_ramlist(void)
889 {
890 qemu_mutex_unlock(&ram_list.mutex);
891 }
892
893 #if defined(__linux__) && !defined(TARGET_S390X)
894
895 #include <sys/vfs.h>
896
897 #define HUGETLBFS_MAGIC 0x958458f6
898
899 static long gethugepagesize(const char *path)
900 {
901 struct statfs fs;
902 int ret;
903
904 do {
905 ret = statfs(path, &fs);
906 } while (ret != 0 && errno == EINTR);
907
908 if (ret != 0) {
909 perror(path);
910 return 0;
911 }
912
913 if (fs.f_type != HUGETLBFS_MAGIC)
914 fprintf(stderr, "Warning: path not on HugeTLBFS: %s\n", path);
915
916 return fs.f_bsize;
917 }
918
919 static void *file_ram_alloc(RAMBlock *block,
920 ram_addr_t memory,
921 const char *path)
922 {
923 char *filename;
924 char *sanitized_name;
925 char *c;
926 void *area;
927 int fd;
928 #ifdef MAP_POPULATE
929 int flags;
930 #endif
931 unsigned long hpagesize;
932
933 hpagesize = gethugepagesize(path);
934 if (!hpagesize) {
935 return NULL;
936 }
937
938 if (memory < hpagesize) {
939 return NULL;
940 }
941
942 if (kvm_enabled() && !kvm_has_sync_mmu()) {
943 fprintf(stderr, "host lacks kvm mmu notifiers, -mem-path unsupported\n");
944 return NULL;
945 }
946
947 /* Make name safe to use with mkstemp by replacing '/' with '_'. */
948 sanitized_name = g_strdup(block->mr->name);
949 for (c = sanitized_name; *c != '\0'; c++) {
950 if (*c == '/')
951 *c = '_';
952 }
953
954 filename = g_strdup_printf("%s/qemu_back_mem.%s.XXXXXX", path,
955 sanitized_name);
956 g_free(sanitized_name);
957
958 fd = mkstemp(filename);
959 if (fd < 0) {
960 perror("unable to create backing store for hugepages");
961 g_free(filename);
962 return NULL;
963 }
964 unlink(filename);
965 g_free(filename);
966
967 memory = (memory+hpagesize-1) & ~(hpagesize-1);
968
969 /*
970 * ftruncate is not supported by hugetlbfs in older
971 * hosts, so don't bother bailing out on errors.
972 * If anything goes wrong with it under other filesystems,
973 * mmap will fail.
974 */
975 if (ftruncate(fd, memory))
976 perror("ftruncate");
977
978 #ifdef MAP_POPULATE
979 /* NB: MAP_POPULATE won't exhaustively alloc all phys pages in the case
980 * MAP_PRIVATE is requested. For mem_prealloc we mmap as MAP_SHARED
981 * to sidestep this quirk.
982 */
983 flags = mem_prealloc ? MAP_POPULATE | MAP_SHARED : MAP_PRIVATE;
984 area = mmap(0, memory, PROT_READ | PROT_WRITE, flags, fd, 0);
985 #else
986 area = mmap(0, memory, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
987 #endif
988 if (area == MAP_FAILED) {
989 perror("file_ram_alloc: can't mmap RAM pages");
990 close(fd);
991 return (NULL);
992 }
993 block->fd = fd;
994 return area;
995 }
996 #endif
997
998 static ram_addr_t find_ram_offset(ram_addr_t size)
999 {
1000 RAMBlock *block, *next_block;
1001 ram_addr_t offset = RAM_ADDR_MAX, mingap = RAM_ADDR_MAX;
1002
1003 assert(size != 0); /* it would hand out same offset multiple times */
1004
1005 if (QTAILQ_EMPTY(&ram_list.blocks))
1006 return 0;
1007
1008 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
1009 ram_addr_t end, next = RAM_ADDR_MAX;
1010
1011 end = block->offset + block->length;
1012
1013 QTAILQ_FOREACH(next_block, &ram_list.blocks, next) {
1014 if (next_block->offset >= end) {
1015 next = MIN(next, next_block->offset);
1016 }
1017 }
1018 if (next - end >= size && next - end < mingap) {
1019 offset = end;
1020 mingap = next - end;
1021 }
1022 }
1023
1024 if (offset == RAM_ADDR_MAX) {
1025 fprintf(stderr, "Failed to find gap of requested size: %" PRIu64 "\n",
1026 (uint64_t)size);
1027 abort();
1028 }
1029
1030 return offset;
1031 }
1032
1033 ram_addr_t last_ram_offset(void)
1034 {
1035 RAMBlock *block;
1036 ram_addr_t last = 0;
1037
1038 QTAILQ_FOREACH(block, &ram_list.blocks, next)
1039 last = MAX(last, block->offset + block->length);
1040
1041 return last;
1042 }
1043
1044 static void qemu_ram_setup_dump(void *addr, ram_addr_t size)
1045 {
1046 int ret;
1047 QemuOpts *machine_opts;
1048
1049 /* Use MADV_DONTDUMP, if user doesn't want the guest memory in the core */
1050 machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
1051 if (machine_opts &&
1052 !qemu_opt_get_bool(machine_opts, "dump-guest-core", true)) {
1053 ret = qemu_madvise(addr, size, QEMU_MADV_DONTDUMP);
1054 if (ret) {
1055 perror("qemu_madvise");
1056 fprintf(stderr, "madvise doesn't support MADV_DONTDUMP, "
1057 "but dump_guest_core=off specified\n");
1058 }
1059 }
1060 }
1061
1062 void qemu_ram_set_idstr(ram_addr_t addr, const char *name, DeviceState *dev)
1063 {
1064 RAMBlock *new_block, *block;
1065
1066 new_block = NULL;
1067 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
1068 if (block->offset == addr) {
1069 new_block = block;
1070 break;
1071 }
1072 }
1073 assert(new_block);
1074 assert(!new_block->idstr[0]);
1075
1076 if (dev) {
1077 char *id = qdev_get_dev_path(dev);
1078 if (id) {
1079 snprintf(new_block->idstr, sizeof(new_block->idstr), "%s/", id);
1080 g_free(id);
1081 }
1082 }
1083 pstrcat(new_block->idstr, sizeof(new_block->idstr), name);
1084
1085 /* This assumes the iothread lock is taken here too. */
1086 qemu_mutex_lock_ramlist();
1087 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
1088 if (block != new_block && !strcmp(block->idstr, new_block->idstr)) {
1089 fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n",
1090 new_block->idstr);
1091 abort();
1092 }
1093 }
1094 qemu_mutex_unlock_ramlist();
1095 }
1096
1097 static int memory_try_enable_merging(void *addr, size_t len)
1098 {
1099 QemuOpts *opts;
1100
1101 opts = qemu_opts_find(qemu_find_opts("machine"), 0);
1102 if (opts && !qemu_opt_get_bool(opts, "mem-merge", true)) {
1103 /* disabled by the user */
1104 return 0;
1105 }
1106
1107 return qemu_madvise(addr, len, QEMU_MADV_MERGEABLE);
1108 }
1109
1110 ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
1111 MemoryRegion *mr)
1112 {
1113 RAMBlock *block, *new_block;
1114
1115 size = TARGET_PAGE_ALIGN(size);
1116 new_block = g_malloc0(sizeof(*new_block));
1117
1118 /* This assumes the iothread lock is taken here too. */
1119 qemu_mutex_lock_ramlist();
1120 new_block->mr = mr;
1121 new_block->offset = find_ram_offset(size);
1122 if (host) {
1123 new_block->host = host;
1124 new_block->flags |= RAM_PREALLOC_MASK;
1125 } else {
1126 if (mem_path) {
1127 #if defined (__linux__) && !defined(TARGET_S390X)
1128 new_block->host = file_ram_alloc(new_block, size, mem_path);
1129 if (!new_block->host) {
1130 new_block->host = qemu_anon_ram_alloc(size);
1131 memory_try_enable_merging(new_block->host, size);
1132 }
1133 #else
1134 fprintf(stderr, "-mem-path option unsupported\n");
1135 exit(1);
1136 #endif
1137 } else {
1138 if (xen_enabled()) {
1139 xen_ram_alloc(new_block->offset, size, mr);
1140 } else if (kvm_enabled()) {
1141 /* some s390/kvm configurations have special constraints */
1142 new_block->host = kvm_ram_alloc(size);
1143 } else {
1144 new_block->host = qemu_anon_ram_alloc(size);
1145 }
1146 memory_try_enable_merging(new_block->host, size);
1147 }
1148 }
1149 new_block->length = size;
1150
1151 /* Keep the list sorted from biggest to smallest block. */
1152 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
1153 if (block->length < new_block->length) {
1154 break;
1155 }
1156 }
1157 if (block) {
1158 QTAILQ_INSERT_BEFORE(block, new_block, next);
1159 } else {
1160 QTAILQ_INSERT_TAIL(&ram_list.blocks, new_block, next);
1161 }
1162 ram_list.mru_block = NULL;
1163
1164 ram_list.version++;
1165 qemu_mutex_unlock_ramlist();
1166
1167 ram_list.phys_dirty = g_realloc(ram_list.phys_dirty,
1168 last_ram_offset() >> TARGET_PAGE_BITS);
1169 memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS),
1170 0, size >> TARGET_PAGE_BITS);
1171 cpu_physical_memory_set_dirty_range(new_block->offset, size, 0xff);
1172
1173 qemu_ram_setup_dump(new_block->host, size);
1174 qemu_madvise(new_block->host, size, QEMU_MADV_HUGEPAGE);
1175
1176 if (kvm_enabled())
1177 kvm_setup_guest_memory(new_block->host, size);
1178
1179 return new_block->offset;
1180 }
1181
1182 ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr)
1183 {
1184 return qemu_ram_alloc_from_ptr(size, NULL, mr);
1185 }
1186
1187 void qemu_ram_free_from_ptr(ram_addr_t addr)
1188 {
1189 RAMBlock *block;
1190
1191 /* This assumes the iothread lock is taken here too. */
1192 qemu_mutex_lock_ramlist();
1193 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
1194 if (addr == block->offset) {
1195 QTAILQ_REMOVE(&ram_list.blocks, block, next);
1196 ram_list.mru_block = NULL;
1197 ram_list.version++;
1198 g_free(block);
1199 break;
1200 }
1201 }
1202 qemu_mutex_unlock_ramlist();
1203 }
1204
1205 void qemu_ram_free(ram_addr_t addr)
1206 {
1207 RAMBlock *block;
1208
1209 /* This assumes the iothread lock is taken here too. */
1210 qemu_mutex_lock_ramlist();
1211 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
1212 if (addr == block->offset) {
1213 QTAILQ_REMOVE(&ram_list.blocks, block, next);
1214 ram_list.mru_block = NULL;
1215 ram_list.version++;
1216 if (block->flags & RAM_PREALLOC_MASK) {
1217 ;
1218 } else if (mem_path) {
1219 #if defined (__linux__) && !defined(TARGET_S390X)
1220 if (block->fd) {
1221 munmap(block->host, block->length);
1222 close(block->fd);
1223 } else {
1224 qemu_anon_ram_free(block->host, block->length);
1225 }
1226 #else
1227 abort();
1228 #endif
1229 } else {
1230 if (xen_enabled()) {
1231 xen_invalidate_map_cache_entry(block->host);
1232 } else {
1233 qemu_anon_ram_free(block->host, block->length);
1234 }
1235 }
1236 g_free(block);
1237 break;
1238 }
1239 }
1240 qemu_mutex_unlock_ramlist();
1241
1242 }
1243
1244 #ifndef _WIN32
1245 void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
1246 {
1247 RAMBlock *block;
1248 ram_addr_t offset;
1249 int flags;
1250 void *area, *vaddr;
1251
1252 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
1253 offset = addr - block->offset;
1254 if (offset < block->length) {
1255 vaddr = block->host + offset;
1256 if (block->flags & RAM_PREALLOC_MASK) {
1257 ;
1258 } else {
1259 flags = MAP_FIXED;
1260 munmap(vaddr, length);
1261 if (mem_path) {
1262 #if defined(__linux__) && !defined(TARGET_S390X)
1263 if (block->fd) {
1264 #ifdef MAP_POPULATE
1265 flags |= mem_prealloc ? MAP_POPULATE | MAP_SHARED :
1266 MAP_PRIVATE;
1267 #else
1268 flags |= MAP_PRIVATE;
1269 #endif
1270 area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
1271 flags, block->fd, offset);
1272 } else {
1273 flags |= MAP_PRIVATE | MAP_ANONYMOUS;
1274 area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
1275 flags, -1, 0);
1276 }
1277 #else
1278 abort();
1279 #endif
1280 } else {
1281 #if defined(TARGET_S390X) && defined(CONFIG_KVM)
1282 flags |= MAP_SHARED | MAP_ANONYMOUS;
1283 area = mmap(vaddr, length, PROT_EXEC|PROT_READ|PROT_WRITE,
1284 flags, -1, 0);
1285 #else
1286 flags |= MAP_PRIVATE | MAP_ANONYMOUS;
1287 area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
1288 flags, -1, 0);
1289 #endif
1290 }
1291 if (area != vaddr) {
1292 fprintf(stderr, "Could not remap addr: "
1293 RAM_ADDR_FMT "@" RAM_ADDR_FMT "\n",
1294 length, addr);
1295 exit(1);
1296 }
1297 memory_try_enable_merging(vaddr, length);
1298 qemu_ram_setup_dump(vaddr, length);
1299 }
1300 return;
1301 }
1302 }
1303 }
1304 #endif /* !_WIN32 */
1305
1306 static RAMBlock *qemu_get_ram_block(ram_addr_t addr)
1307 {
1308 RAMBlock *block;
1309
1310 /* The list is protected by the iothread lock here. */
1311 block = ram_list.mru_block;
1312 if (block && addr - block->offset < block->length) {
1313 goto found;
1314 }
1315 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
1316 if (addr - block->offset < block->length) {
1317 goto found;
1318 }
1319 }
1320
1321 fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr);
1322 abort();
1323
1324 found:
1325 ram_list.mru_block = block;
1326 return block;
1327 }
1328
1329 /* Return a host pointer to ram allocated with qemu_ram_alloc.
1330 With the exception of the softmmu code in this file, this should
1331 only be used for local memory (e.g. video ram) that the device owns,
1332 and knows it isn't going to access beyond the end of the block.
1333
1334 It should not be used for general purpose DMA.
1335 Use cpu_physical_memory_map/cpu_physical_memory_rw instead.
1336 */
1337 void *qemu_get_ram_ptr(ram_addr_t addr)
1338 {
1339 RAMBlock *block = qemu_get_ram_block(addr);
1340
1341 if (xen_enabled()) {
1342 /* We need to check if the requested address is in the RAM
1343 * because we don't want to map the entire memory in QEMU.
1344 * In that case just map until the end of the page.
1345 */
1346 if (block->offset == 0) {
1347 return xen_map_cache(addr, 0, 0);
1348 } else if (block->host == NULL) {
1349 block->host =
1350 xen_map_cache(block->offset, block->length, 1);
1351 }
1352 }
1353 return block->host + (addr - block->offset);
1354 }
1355
1356 /* Return a host pointer to ram allocated with qemu_ram_alloc. Same as
1357 * qemu_get_ram_ptr but do not touch ram_list.mru_block.
1358 *
1359 * ??? Is this still necessary?
1360 */
1361 static void *qemu_safe_ram_ptr(ram_addr_t addr)
1362 {
1363 RAMBlock *block;
1364
1365 /* The list is protected by the iothread lock here. */
1366 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
1367 if (addr - block->offset < block->length) {
1368 if (xen_enabled()) {
1369 /* We need to check if the requested address is in the RAM
1370 * because we don't want to map the entire memory in QEMU.
1371 * In that case just map until the end of the page.
1372 */
1373 if (block->offset == 0) {
1374 return xen_map_cache(addr, 0, 0);
1375 } else if (block->host == NULL) {
1376 block->host =
1377 xen_map_cache(block->offset, block->length, 1);
1378 }
1379 }
1380 return block->host + (addr - block->offset);
1381 }
1382 }
1383
1384 fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr);
1385 abort();
1386
1387 return NULL;
1388 }
1389
1390 /* Return a host pointer to guest's ram. Similar to qemu_get_ram_ptr
1391 * but takes a size argument */
1392 static void *qemu_ram_ptr_length(ram_addr_t addr, ram_addr_t *size)
1393 {
1394 if (*size == 0) {
1395 return NULL;
1396 }
1397 if (xen_enabled()) {
1398 return xen_map_cache(addr, *size, 1);
1399 } else {
1400 RAMBlock *block;
1401
1402 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
1403 if (addr - block->offset < block->length) {
1404 if (addr - block->offset + *size > block->length)
1405 *size = block->length - addr + block->offset;
1406 return block->host + (addr - block->offset);
1407 }
1408 }
1409
1410 fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr);
1411 abort();
1412 }
1413 }
1414
1415 /* Some of the softmmu routines need to translate from a host pointer
1416 (typically a TLB entry) back to a ram offset. */
1417 MemoryRegion *qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr)
1418 {
1419 RAMBlock *block;
1420 uint8_t *host = ptr;
1421
1422 if (xen_enabled()) {
1423 *ram_addr = xen_ram_addr_from_mapcache(ptr);
1424 return qemu_get_ram_block(*ram_addr)->mr;
1425 }
1426
1427 block = ram_list.mru_block;
1428 if (block && block->host && host - block->host < block->length) {
1429 goto found;
1430 }
1431
1432 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
1433 /* This case append when the block is not mapped. */
1434 if (block->host == NULL) {
1435 continue;
1436 }
1437 if (host - block->host < block->length) {
1438 goto found;
1439 }
1440 }
1441
1442 return NULL;
1443
1444 found:
1445 *ram_addr = block->offset + (host - block->host);
1446 return block->mr;
1447 }
1448
1449 static void notdirty_mem_write(void *opaque, hwaddr ram_addr,
1450 uint64_t val, unsigned size)
1451 {
1452 int dirty_flags;
1453 dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr);
1454 if (!(dirty_flags & CODE_DIRTY_FLAG)) {
1455 tb_invalidate_phys_page_fast(ram_addr, size);
1456 dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr);
1457 }
1458 switch (size) {
1459 case 1:
1460 stb_p(qemu_get_ram_ptr(ram_addr), val);
1461 break;
1462 case 2:
1463 stw_p(qemu_get_ram_ptr(ram_addr), val);
1464 break;
1465 case 4:
1466 stl_p(qemu_get_ram_ptr(ram_addr), val);
1467 break;
1468 default:
1469 abort();
1470 }
1471 dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
1472 cpu_physical_memory_set_dirty_flags(ram_addr, dirty_flags);
1473 /* we remove the notdirty callback only if the code has been
1474 flushed */
1475 if (dirty_flags == 0xff)
1476 tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr);
1477 }
1478
1479 static bool notdirty_mem_accepts(void *opaque, hwaddr addr,
1480 unsigned size, bool is_write)
1481 {
1482 return is_write;
1483 }
1484
1485 static const MemoryRegionOps notdirty_mem_ops = {
1486 .write = notdirty_mem_write,
1487 .valid.accepts = notdirty_mem_accepts,
1488 .endianness = DEVICE_NATIVE_ENDIAN,
1489 };
1490
1491 /* Generate a debug exception if a watchpoint has been hit. */
1492 static void check_watchpoint(int offset, int len_mask, int flags)
1493 {
1494 CPUArchState *env = cpu_single_env;
1495 target_ulong pc, cs_base;
1496 target_ulong vaddr;
1497 CPUWatchpoint *wp;
1498 int cpu_flags;
1499
1500 if (env->watchpoint_hit) {
1501 /* We re-entered the check after replacing the TB. Now raise
1502 * the debug interrupt so that is will trigger after the
1503 * current instruction. */
1504 cpu_interrupt(ENV_GET_CPU(env), CPU_INTERRUPT_DEBUG);
1505 return;
1506 }
1507 vaddr = (env->mem_io_vaddr & TARGET_PAGE_MASK) + offset;
1508 QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
1509 if ((vaddr == (wp->vaddr & len_mask) ||
1510 (vaddr & wp->len_mask) == wp->vaddr) && (wp->flags & flags)) {
1511 wp->flags |= BP_WATCHPOINT_HIT;
1512 if (!env->watchpoint_hit) {
1513 env->watchpoint_hit = wp;
1514 tb_check_watchpoint(env);
1515 if (wp->flags & BP_STOP_BEFORE_ACCESS) {
1516 env->exception_index = EXCP_DEBUG;
1517 cpu_loop_exit(env);
1518 } else {
1519 cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags);
1520 tb_gen_code(env, pc, cs_base, cpu_flags, 1);
1521 cpu_resume_from_signal(env, NULL);
1522 }
1523 }
1524 } else {
1525 wp->flags &= ~BP_WATCHPOINT_HIT;
1526 }
1527 }
1528 }
1529
1530 /* Watchpoint access routines. Watchpoints are inserted using TLB tricks,
1531 so these check for a hit then pass through to the normal out-of-line
1532 phys routines. */
1533 static uint64_t watch_mem_read(void *opaque, hwaddr addr,
1534 unsigned size)
1535 {
1536 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~(size - 1), BP_MEM_READ);
1537 switch (size) {
1538 case 1: return ldub_phys(addr);
1539 case 2: return lduw_phys(addr);
1540 case 4: return ldl_phys(addr);
1541 default: abort();
1542 }
1543 }
1544
1545 static void watch_mem_write(void *opaque, hwaddr addr,
1546 uint64_t val, unsigned size)
1547 {
1548 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~(size - 1), BP_MEM_WRITE);
1549 switch (size) {
1550 case 1:
1551 stb_phys(addr, val);
1552 break;
1553 case 2:
1554 stw_phys(addr, val);
1555 break;
1556 case 4:
1557 stl_phys(addr, val);
1558 break;
1559 default: abort();
1560 }
1561 }
1562
1563 static const MemoryRegionOps watch_mem_ops = {
1564 .read = watch_mem_read,
1565 .write = watch_mem_write,
1566 .endianness = DEVICE_NATIVE_ENDIAN,
1567 };
1568
1569 static uint64_t subpage_read(void *opaque, hwaddr addr,
1570 unsigned len)
1571 {
1572 subpage_t *subpage = opaque;
1573 uint8_t buf[4];
1574
1575 #if defined(DEBUG_SUBPAGE)
1576 printf("%s: subpage %p len %d addr " TARGET_FMT_plx "\n", __func__,
1577 subpage, len, addr);
1578 #endif
1579 address_space_read(subpage->as, addr + subpage->base, buf, len);
1580 switch (len) {
1581 case 1:
1582 return ldub_p(buf);
1583 case 2:
1584 return lduw_p(buf);
1585 case 4:
1586 return ldl_p(buf);
1587 default:
1588 abort();
1589 }
1590 }
1591
1592 static void subpage_write(void *opaque, hwaddr addr,
1593 uint64_t value, unsigned len)
1594 {
1595 subpage_t *subpage = opaque;
1596 uint8_t buf[4];
1597
1598 #if defined(DEBUG_SUBPAGE)
1599 printf("%s: subpage %p len %d addr " TARGET_FMT_plx
1600 " value %"PRIx64"\n",
1601 __func__, subpage, len, addr, value);
1602 #endif
1603 switch (len) {
1604 case 1:
1605 stb_p(buf, value);
1606 break;
1607 case 2:
1608 stw_p(buf, value);
1609 break;
1610 case 4:
1611 stl_p(buf, value);
1612 break;
1613 default:
1614 abort();
1615 }
1616 address_space_write(subpage->as, addr + subpage->base, buf, len);
1617 }
1618
1619 static bool subpage_accepts(void *opaque, hwaddr addr,
1620 unsigned size, bool is_write)
1621 {
1622 subpage_t *subpage = opaque;
1623 #if defined(DEBUG_SUBPAGE)
1624 printf("%s: subpage %p %c len %d addr " TARGET_FMT_plx "\n",
1625 __func__, subpage, is_write ? 'w' : 'r', len, addr);
1626 #endif
1627
1628 return address_space_access_valid(subpage->as, addr + subpage->base,
1629 size, is_write);
1630 }
1631
1632 static const MemoryRegionOps subpage_ops = {
1633 .read = subpage_read,
1634 .write = subpage_write,
1635 .valid.accepts = subpage_accepts,
1636 .endianness = DEVICE_NATIVE_ENDIAN,
1637 };
1638
1639 static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
1640 uint16_t section)
1641 {
1642 int idx, eidx;
1643
1644 if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE)
1645 return -1;
1646 idx = SUBPAGE_IDX(start);
1647 eidx = SUBPAGE_IDX(end);
1648 #if defined(DEBUG_SUBPAGE)
1649 printf("%s: %p start %08x end %08x idx %08x eidx %08x mem %ld\n", __func__,
1650 mmio, start, end, idx, eidx, memory);
1651 #endif
1652 for (; idx <= eidx; idx++) {
1653 mmio->sub_section[idx] = section;
1654 }
1655
1656 return 0;
1657 }
1658
1659 static subpage_t *subpage_init(AddressSpace *as, hwaddr base)
1660 {
1661 subpage_t *mmio;
1662
1663 mmio = g_malloc0(sizeof(subpage_t));
1664
1665 mmio->as = as;
1666 mmio->base = base;
1667 memory_region_init_io(&mmio->iomem, NULL, &subpage_ops, mmio,
1668 "subpage", TARGET_PAGE_SIZE);
1669 mmio->iomem.subpage = true;
1670 #if defined(DEBUG_SUBPAGE)
1671 printf("%s: %p base " TARGET_FMT_plx " len %08x %d\n", __func__,
1672 mmio, base, TARGET_PAGE_SIZE, subpage_memory);
1673 #endif
1674 subpage_register(mmio, 0, TARGET_PAGE_SIZE-1, PHYS_SECTION_UNASSIGNED);
1675
1676 return mmio;
1677 }
1678
1679 static uint16_t dummy_section(MemoryRegion *mr)
1680 {
1681 MemoryRegionSection section = {
1682 .mr = mr,
1683 .offset_within_address_space = 0,
1684 .offset_within_region = 0,
1685 .size = int128_2_64(),
1686 };
1687
1688 return phys_section_add(&section);
1689 }
1690
1691 MemoryRegion *iotlb_to_region(hwaddr index)
1692 {
1693 return address_space_memory.dispatch->sections[index & ~TARGET_PAGE_MASK].mr;
1694 }
1695
1696 static void io_mem_init(void)
1697 {
1698 memory_region_init_io(&io_mem_rom, NULL, &unassigned_mem_ops, NULL, "rom", UINT64_MAX);
1699 memory_region_init_io(&io_mem_unassigned, NULL, &unassigned_mem_ops, NULL,
1700 "unassigned", UINT64_MAX);
1701 memory_region_init_io(&io_mem_notdirty, NULL, &notdirty_mem_ops, NULL,
1702 "notdirty", UINT64_MAX);
1703 memory_region_init_io(&io_mem_watch, NULL, &watch_mem_ops, NULL,
1704 "watch", UINT64_MAX);
1705 }
1706
1707 static void mem_begin(MemoryListener *listener)
1708 {
1709 AddressSpace *as = container_of(listener, AddressSpace, dispatch_listener);
1710 AddressSpaceDispatch *d = g_new(AddressSpaceDispatch, 1);
1711
1712 d->phys_map = (PhysPageEntry) { .ptr = PHYS_MAP_NODE_NIL, .is_leaf = 0 };
1713 d->as = as;
1714 as->next_dispatch = d;
1715 }
1716
1717 static void mem_commit(MemoryListener *listener)
1718 {
1719 AddressSpace *as = container_of(listener, AddressSpace, dispatch_listener);
1720 AddressSpaceDispatch *cur = as->dispatch;
1721 AddressSpaceDispatch *next = as->next_dispatch;
1722
1723 next->nodes = next_map.nodes;
1724 next->sections = next_map.sections;
1725
1726 as->dispatch = next;
1727 g_free(cur);
1728 }
1729
1730 static void core_begin(MemoryListener *listener)
1731 {
1732 uint16_t n;
1733
1734 prev_map = g_new(PhysPageMap, 1);
1735 *prev_map = next_map;
1736
1737 memset(&next_map, 0, sizeof(next_map));
1738 n = dummy_section(&io_mem_unassigned);
1739 assert(n == PHYS_SECTION_UNASSIGNED);
1740 n = dummy_section(&io_mem_notdirty);
1741 assert(n == PHYS_SECTION_NOTDIRTY);
1742 n = dummy_section(&io_mem_rom);
1743 assert(n == PHYS_SECTION_ROM);
1744 n = dummy_section(&io_mem_watch);
1745 assert(n == PHYS_SECTION_WATCH);
1746 }
1747
1748 /* This listener's commit run after the other AddressSpaceDispatch listeners'.
1749 * All AddressSpaceDispatch instances have switched to the next map.
1750 */
1751 static void core_commit(MemoryListener *listener)
1752 {
1753 phys_sections_free(prev_map);
1754 }
1755
1756 static void tcg_commit(MemoryListener *listener)
1757 {
1758 CPUArchState *env;
1759
1760 /* since each CPU stores ram addresses in its TLB cache, we must
1761 reset the modified entries */
1762 /* XXX: slow ! */
1763 for(env = first_cpu; env != NULL; env = env->next_cpu) {
1764 tlb_flush(env, 1);
1765 }
1766 }
1767
1768 static void core_log_global_start(MemoryListener *listener)
1769 {
1770 cpu_physical_memory_set_dirty_tracking(1);
1771 }
1772
1773 static void core_log_global_stop(MemoryListener *listener)
1774 {
1775 cpu_physical_memory_set_dirty_tracking(0);
1776 }
1777
1778 static MemoryListener core_memory_listener = {
1779 .begin = core_begin,
1780 .commit = core_commit,
1781 .log_global_start = core_log_global_start,
1782 .log_global_stop = core_log_global_stop,
1783 .priority = 1,
1784 };
1785
1786 static MemoryListener tcg_memory_listener = {
1787 .commit = tcg_commit,
1788 };
1789
1790 void address_space_init_dispatch(AddressSpace *as)
1791 {
1792 as->dispatch = NULL;
1793 as->dispatch_listener = (MemoryListener) {
1794 .begin = mem_begin,
1795 .commit = mem_commit,
1796 .region_add = mem_add,
1797 .region_nop = mem_add,
1798 .priority = 0,
1799 };
1800 memory_listener_register(&as->dispatch_listener, as);
1801 }
1802
1803 void address_space_destroy_dispatch(AddressSpace *as)
1804 {
1805 AddressSpaceDispatch *d = as->dispatch;
1806
1807 memory_listener_unregister(&as->dispatch_listener);
1808 g_free(d);
1809 as->dispatch = NULL;
1810 }
1811
1812 static void memory_map_init(void)
1813 {
1814 system_memory = g_malloc(sizeof(*system_memory));
1815 memory_region_init(system_memory, NULL, "system", INT64_MAX);
1816 address_space_init(&address_space_memory, system_memory, "memory");
1817
1818 system_io = g_malloc(sizeof(*system_io));
1819 memory_region_init(system_io, NULL, "io", 65536);
1820 address_space_init(&address_space_io, system_io, "I/O");
1821
1822 memory_listener_register(&core_memory_listener, &address_space_memory);
1823 memory_listener_register(&tcg_memory_listener, &address_space_memory);
1824 }
1825
1826 MemoryRegion *get_system_memory(void)
1827 {
1828 return system_memory;
1829 }
1830
1831 MemoryRegion *get_system_io(void)
1832 {
1833 return system_io;
1834 }
1835
1836 #endif /* !defined(CONFIG_USER_ONLY) */
1837
1838 /* physical memory access (slow version, mainly for debug) */
1839 #if defined(CONFIG_USER_ONLY)
1840 int cpu_memory_rw_debug(CPUArchState *env, target_ulong addr,
1841 uint8_t *buf, int len, int is_write)
1842 {
1843 int l, flags;
1844 target_ulong page;
1845 void * p;
1846
1847 while (len > 0) {
1848 page = addr & TARGET_PAGE_MASK;
1849 l = (page + TARGET_PAGE_SIZE) - addr;
1850 if (l > len)
1851 l = len;
1852 flags = page_get_flags(page);
1853 if (!(flags & PAGE_VALID))
1854 return -1;
1855 if (is_write) {
1856 if (!(flags & PAGE_WRITE))
1857 return -1;
1858 /* XXX: this code should not depend on lock_user */
1859 if (!(p = lock_user(VERIFY_WRITE, addr, l, 0)))
1860 return -1;
1861 memcpy(p, buf, l);
1862 unlock_user(p, addr, l);
1863 } else {
1864 if (!(flags & PAGE_READ))
1865 return -1;
1866 /* XXX: this code should not depend on lock_user */
1867 if (!(p = lock_user(VERIFY_READ, addr, l, 1)))
1868 return -1;
1869 memcpy(buf, p, l);
1870 unlock_user(p, addr, 0);
1871 }
1872 len -= l;
1873 buf += l;
1874 addr += l;
1875 }
1876 return 0;
1877 }
1878
1879 #else
1880
1881 static void invalidate_and_set_dirty(hwaddr addr,
1882 hwaddr length)
1883 {
1884 if (!cpu_physical_memory_is_dirty(addr)) {
1885 /* invalidate code */
1886 tb_invalidate_phys_page_range(addr, addr + length, 0);
1887 /* set dirty bit */
1888 cpu_physical_memory_set_dirty_flags(addr, (0xff & ~CODE_DIRTY_FLAG));
1889 }
1890 xen_modified_memory(addr, length);
1891 }
1892
1893 static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write)
1894 {
1895 if (memory_region_is_ram(mr)) {
1896 return !(is_write && mr->readonly);
1897 }
1898 if (memory_region_is_romd(mr)) {
1899 return !is_write;
1900 }
1901
1902 return false;
1903 }
1904
1905 static inline int memory_access_size(MemoryRegion *mr, int l, hwaddr addr)
1906 {
1907 if (l >= 4 && (((addr & 3) == 0 || mr->ops->impl.unaligned))) {
1908 return 4;
1909 }
1910 if (l >= 2 && (((addr & 1) == 0) || mr->ops->impl.unaligned)) {
1911 return 2;
1912 }
1913 return 1;
1914 }
1915
1916 bool address_space_rw(AddressSpace *as, hwaddr addr, uint8_t *buf,
1917 int len, bool is_write)
1918 {
1919 hwaddr l;
1920 uint8_t *ptr;
1921 uint64_t val;
1922 hwaddr addr1;
1923 MemoryRegion *mr;
1924 bool error = false;
1925
1926 while (len > 0) {
1927 l = len;
1928 mr = address_space_translate(as, addr, &addr1, &l, is_write);
1929
1930 if (is_write) {
1931 if (!memory_access_is_direct(mr, is_write)) {
1932 l = memory_access_size(mr, l, addr1);
1933 /* XXX: could force cpu_single_env to NULL to avoid
1934 potential bugs */
1935 if (l == 4) {
1936 /* 32 bit write access */
1937 val = ldl_p(buf);
1938 error |= io_mem_write(mr, addr1, val, 4);
1939 } else if (l == 2) {
1940 /* 16 bit write access */
1941 val = lduw_p(buf);
1942 error |= io_mem_write(mr, addr1, val, 2);
1943 } else {
1944 /* 8 bit write access */
1945 val = ldub_p(buf);
1946 error |= io_mem_write(mr, addr1, val, 1);
1947 }
1948 } else {
1949 addr1 += memory_region_get_ram_addr(mr);
1950 /* RAM case */
1951 ptr = qemu_get_ram_ptr(addr1);
1952 memcpy(ptr, buf, l);
1953 invalidate_and_set_dirty(addr1, l);
1954 }
1955 } else {
1956 if (!memory_access_is_direct(mr, is_write)) {
1957 /* I/O case */
1958 l = memory_access_size(mr, l, addr1);
1959 if (l == 4) {
1960 /* 32 bit read access */
1961 error |= io_mem_read(mr, addr1, &val, 4);
1962 stl_p(buf, val);
1963 } else if (l == 2) {
1964 /* 16 bit read access */
1965 error |= io_mem_read(mr, addr1, &val, 2);
1966 stw_p(buf, val);
1967 } else {
1968 /* 8 bit read access */
1969 error |= io_mem_read(mr, addr1, &val, 1);
1970 stb_p(buf, val);
1971 }
1972 } else {
1973 /* RAM case */
1974 ptr = qemu_get_ram_ptr(mr->ram_addr + addr1);
1975 memcpy(buf, ptr, l);
1976 }
1977 }
1978 len -= l;
1979 buf += l;
1980 addr += l;
1981 }
1982
1983 return error;
1984 }
1985
1986 bool address_space_write(AddressSpace *as, hwaddr addr,
1987 const uint8_t *buf, int len)
1988 {
1989 return address_space_rw(as, addr, (uint8_t *)buf, len, true);
1990 }
1991
1992 bool address_space_read(AddressSpace *as, hwaddr addr, uint8_t *buf, int len)
1993 {
1994 return address_space_rw(as, addr, buf, len, false);
1995 }
1996
1997
1998 void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf,
1999 int len, int is_write)
2000 {
2001 address_space_rw(&address_space_memory, addr, buf, len, is_write);
2002 }
2003
2004 /* used for ROM loading : can write in RAM and ROM */
2005 void cpu_physical_memory_write_rom(hwaddr addr,
2006 const uint8_t *buf, int len)
2007 {
2008 hwaddr l;
2009 uint8_t *ptr;
2010 hwaddr addr1;
2011 MemoryRegion *mr;
2012
2013 while (len > 0) {
2014 l = len;
2015 mr = address_space_translate(&address_space_memory,
2016 addr, &addr1, &l, true);
2017
2018 if (!(memory_region_is_ram(mr) ||
2019 memory_region_is_romd(mr))) {
2020 /* do nothing */
2021 } else {
2022 addr1 += memory_region_get_ram_addr(mr);
2023 /* ROM/RAM case */
2024 ptr = qemu_get_ram_ptr(addr1);
2025 memcpy(ptr, buf, l);
2026 invalidate_and_set_dirty(addr1, l);
2027 }
2028 len -= l;
2029 buf += l;
2030 addr += l;
2031 }
2032 }
2033
2034 typedef struct {
2035 MemoryRegion *mr;
2036 void *buffer;
2037 hwaddr addr;
2038 hwaddr len;
2039 } BounceBuffer;
2040
2041 static BounceBuffer bounce;
2042
2043 typedef struct MapClient {
2044 void *opaque;
2045 void (*callback)(void *opaque);
2046 QLIST_ENTRY(MapClient) link;
2047 } MapClient;
2048
2049 static QLIST_HEAD(map_client_list, MapClient) map_client_list
2050 = QLIST_HEAD_INITIALIZER(map_client_list);
2051
2052 void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque))
2053 {
2054 MapClient *client = g_malloc(sizeof(*client));
2055
2056 client->opaque = opaque;
2057 client->callback = callback;
2058 QLIST_INSERT_HEAD(&map_client_list, client, link);
2059 return client;
2060 }
2061
2062 static void cpu_unregister_map_client(void *_client)
2063 {
2064 MapClient *client = (MapClient *)_client;
2065
2066 QLIST_REMOVE(client, link);
2067 g_free(client);
2068 }
2069
2070 static void cpu_notify_map_clients(void)
2071 {
2072 MapClient *client;
2073
2074 while (!QLIST_EMPTY(&map_client_list)) {
2075 client = QLIST_FIRST(&map_client_list);
2076 client->callback(client->opaque);
2077 cpu_unregister_map_client(client);
2078 }
2079 }
2080
2081 bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write)
2082 {
2083 MemoryRegion *mr;
2084 hwaddr l, xlat;
2085
2086 while (len > 0) {
2087 l = len;
2088 mr = address_space_translate(as, addr, &xlat, &l, is_write);
2089 if (!memory_access_is_direct(mr, is_write)) {
2090 l = memory_access_size(mr, l, addr);
2091 if (!memory_region_access_valid(mr, xlat, l, is_write)) {
2092 return false;
2093 }
2094 }
2095
2096 len -= l;
2097 addr += l;
2098 }
2099 return true;
2100 }
2101
2102 /* Map a physical memory region into a host virtual address.
2103 * May map a subset of the requested range, given by and returned in *plen.
2104 * May return NULL if resources needed to perform the mapping are exhausted.
2105 * Use only for reads OR writes - not for read-modify-write operations.
2106 * Use cpu_register_map_client() to know when retrying the map operation is
2107 * likely to succeed.
2108 */
2109 void *address_space_map(AddressSpace *as,
2110 hwaddr addr,
2111 hwaddr *plen,
2112 bool is_write)
2113 {
2114 hwaddr len = *plen;
2115 hwaddr done = 0;
2116 hwaddr l, xlat, base;
2117 MemoryRegion *mr, *this_mr;
2118 ram_addr_t raddr;
2119
2120 if (len == 0) {
2121 return NULL;
2122 }
2123
2124 l = len;
2125 mr = address_space_translate(as, addr, &xlat, &l, is_write);
2126 if (!memory_access_is_direct(mr, is_write)) {
2127 if (bounce.buffer) {
2128 return NULL;
2129 }
2130 bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, TARGET_PAGE_SIZE);
2131 bounce.addr = addr;
2132 bounce.len = l;
2133
2134 memory_region_ref(mr);
2135 bounce.mr = mr;
2136 if (!is_write) {
2137 address_space_read(as, addr, bounce.buffer, l);
2138 }
2139
2140 *plen = l;
2141 return bounce.buffer;
2142 }
2143
2144 base = xlat;
2145 raddr = memory_region_get_ram_addr(mr);
2146
2147 for (;;) {
2148 len -= l;
2149 addr += l;
2150 done += l;
2151 if (len == 0) {
2152 break;
2153 }
2154
2155 l = len;
2156 this_mr = address_space_translate(as, addr, &xlat, &l, is_write);
2157 if (this_mr != mr || xlat != base + done) {
2158 break;
2159 }
2160 }
2161
2162 memory_region_ref(mr);
2163 *plen = done;
2164 return qemu_ram_ptr_length(raddr + base, plen);
2165 }
2166
2167 /* Unmaps a memory region previously mapped by address_space_map().
2168 * Will also mark the memory as dirty if is_write == 1. access_len gives
2169 * the amount of memory that was actually read or written by the caller.
2170 */
2171 void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len,
2172 int is_write, hwaddr access_len)
2173 {
2174 if (buffer != bounce.buffer) {
2175 MemoryRegion *mr;
2176 ram_addr_t addr1;
2177
2178 mr = qemu_ram_addr_from_host(buffer, &addr1);
2179 assert(mr != NULL);
2180 if (is_write) {
2181 while (access_len) {
2182 unsigned l;
2183 l = TARGET_PAGE_SIZE;
2184 if (l > access_len)
2185 l = access_len;
2186 invalidate_and_set_dirty(addr1, l);
2187 addr1 += l;
2188 access_len -= l;
2189 }
2190 }
2191 if (xen_enabled()) {
2192 xen_invalidate_map_cache_entry(buffer);
2193 }
2194 memory_region_unref(mr);
2195 return;
2196 }
2197 if (is_write) {
2198 address_space_write(as, bounce.addr, bounce.buffer, access_len);
2199 }
2200 qemu_vfree(bounce.buffer);
2201 bounce.buffer = NULL;
2202 memory_region_unref(bounce.mr);
2203 cpu_notify_map_clients();
2204 }
2205
2206 void *cpu_physical_memory_map(hwaddr addr,
2207 hwaddr *plen,
2208 int is_write)
2209 {
2210 return address_space_map(&address_space_memory, addr, plen, is_write);
2211 }
2212
2213 void cpu_physical_memory_unmap(void *buffer, hwaddr len,
2214 int is_write, hwaddr access_len)
2215 {
2216 return address_space_unmap(&address_space_memory, buffer, len, is_write, access_len);
2217 }
2218
2219 /* warning: addr must be aligned */
2220 static inline uint32_t ldl_phys_internal(hwaddr addr,
2221 enum device_endian endian)
2222 {
2223 uint8_t *ptr;
2224 uint64_t val;
2225 MemoryRegion *mr;
2226 hwaddr l = 4;
2227 hwaddr addr1;
2228
2229 mr = address_space_translate(&address_space_memory, addr, &addr1, &l,
2230 false);
2231 if (l < 4 || !memory_access_is_direct(mr, false)) {
2232 /* I/O case */
2233 io_mem_read(mr, addr1, &val, 4);
2234 #if defined(TARGET_WORDS_BIGENDIAN)
2235 if (endian == DEVICE_LITTLE_ENDIAN) {
2236 val = bswap32(val);
2237 }
2238 #else
2239 if (endian == DEVICE_BIG_ENDIAN) {
2240 val = bswap32(val);
2241 }
2242 #endif
2243 } else {
2244 /* RAM case */
2245 ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(mr)
2246 & TARGET_PAGE_MASK)
2247 + addr1);
2248 switch (endian) {
2249 case DEVICE_LITTLE_ENDIAN:
2250 val = ldl_le_p(ptr);
2251 break;
2252 case DEVICE_BIG_ENDIAN:
2253 val = ldl_be_p(ptr);
2254 break;
2255 default:
2256 val = ldl_p(ptr);
2257 break;
2258 }
2259 }
2260 return val;
2261 }
2262
2263 uint32_t ldl_phys(hwaddr addr)
2264 {
2265 return ldl_phys_internal(addr, DEVICE_NATIVE_ENDIAN);
2266 }
2267
2268 uint32_t ldl_le_phys(hwaddr addr)
2269 {
2270 return ldl_phys_internal(addr, DEVICE_LITTLE_ENDIAN);
2271 }
2272
2273 uint32_t ldl_be_phys(hwaddr addr)
2274 {
2275 return ldl_phys_internal(addr, DEVICE_BIG_ENDIAN);
2276 }
2277
2278 /* warning: addr must be aligned */
2279 static inline uint64_t ldq_phys_internal(hwaddr addr,
2280 enum device_endian endian)
2281 {
2282 uint8_t *ptr;
2283 uint64_t val;
2284 MemoryRegion *mr;
2285 hwaddr l = 8;
2286 hwaddr addr1;
2287
2288 mr = address_space_translate(&address_space_memory, addr, &addr1, &l,
2289 false);
2290 if (l < 8 || !memory_access_is_direct(mr, false)) {
2291 /* I/O case */
2292 io_mem_read(mr, addr1, &val, 8);
2293 #if defined(TARGET_WORDS_BIGENDIAN)
2294 if (endian == DEVICE_LITTLE_ENDIAN) {
2295 val = bswap64(val);
2296 }
2297 #else
2298 if (endian == DEVICE_BIG_ENDIAN) {
2299 val = bswap64(val);
2300 }
2301 #endif
2302 } else {
2303 /* RAM case */
2304 ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(mr)
2305 & TARGET_PAGE_MASK)
2306 + addr1);
2307 switch (endian) {
2308 case DEVICE_LITTLE_ENDIAN:
2309 val = ldq_le_p(ptr);
2310 break;
2311 case DEVICE_BIG_ENDIAN:
2312 val = ldq_be_p(ptr);
2313 break;
2314 default:
2315 val = ldq_p(ptr);
2316 break;
2317 }
2318 }
2319 return val;
2320 }
2321
2322 uint64_t ldq_phys(hwaddr addr)
2323 {
2324 return ldq_phys_internal(addr, DEVICE_NATIVE_ENDIAN);
2325 }
2326
2327 uint64_t ldq_le_phys(hwaddr addr)
2328 {
2329 return ldq_phys_internal(addr, DEVICE_LITTLE_ENDIAN);
2330 }
2331
2332 uint64_t ldq_be_phys(hwaddr addr)
2333 {
2334 return ldq_phys_internal(addr, DEVICE_BIG_ENDIAN);
2335 }
2336
2337 /* XXX: optimize */
2338 uint32_t ldub_phys(hwaddr addr)
2339 {
2340 uint8_t val;
2341 cpu_physical_memory_read(addr, &val, 1);
2342 return val;
2343 }
2344
2345 /* warning: addr must be aligned */
2346 static inline uint32_t lduw_phys_internal(hwaddr addr,
2347 enum device_endian endian)
2348 {
2349 uint8_t *ptr;
2350 uint64_t val;
2351 MemoryRegion *mr;
2352 hwaddr l = 2;
2353 hwaddr addr1;
2354
2355 mr = address_space_translate(&address_space_memory, addr, &addr1, &l,
2356 false);
2357 if (l < 2 || !memory_access_is_direct(mr, false)) {
2358 /* I/O case */
2359 io_mem_read(mr, addr1, &val, 2);
2360 #if defined(TARGET_WORDS_BIGENDIAN)
2361 if (endian == DEVICE_LITTLE_ENDIAN) {
2362 val = bswap16(val);
2363 }
2364 #else
2365 if (endian == DEVICE_BIG_ENDIAN) {
2366 val = bswap16(val);
2367 }
2368 #endif
2369 } else {
2370 /* RAM case */
2371 ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(mr)
2372 & TARGET_PAGE_MASK)
2373 + addr1);
2374 switch (endian) {
2375 case DEVICE_LITTLE_ENDIAN:
2376 val = lduw_le_p(ptr);
2377 break;
2378 case DEVICE_BIG_ENDIAN:
2379 val = lduw_be_p(ptr);
2380 break;
2381 default:
2382 val = lduw_p(ptr);
2383 break;
2384 }
2385 }
2386 return val;
2387 }
2388
2389 uint32_t lduw_phys(hwaddr addr)
2390 {
2391 return lduw_phys_internal(addr, DEVICE_NATIVE_ENDIAN);
2392 }
2393
2394 uint32_t lduw_le_phys(hwaddr addr)
2395 {
2396 return lduw_phys_internal(addr, DEVICE_LITTLE_ENDIAN);
2397 }
2398
2399 uint32_t lduw_be_phys(hwaddr addr)
2400 {
2401 return lduw_phys_internal(addr, DEVICE_BIG_ENDIAN);
2402 }
2403
2404 /* warning: addr must be aligned. The ram page is not masked as dirty
2405 and the code inside is not invalidated. It is useful if the dirty
2406 bits are used to track modified PTEs */
2407 void stl_phys_notdirty(hwaddr addr, uint32_t val)
2408 {
2409 uint8_t *ptr;
2410 MemoryRegion *mr;
2411 hwaddr l = 4;
2412 hwaddr addr1;
2413
2414 mr = address_space_translate(&address_space_memory, addr, &addr1, &l,
2415 true);
2416 if (l < 4 || !memory_access_is_direct(mr, true)) {
2417 io_mem_write(mr, addr1, val, 4);
2418 } else {
2419 addr1 += memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK;
2420 ptr = qemu_get_ram_ptr(addr1);
2421 stl_p(ptr, val);
2422
2423 if (unlikely(in_migration)) {
2424 if (!cpu_physical_memory_is_dirty(addr1)) {
2425 /* invalidate code */
2426 tb_invalidate_phys_page_range(addr1, addr1 + 4, 0);
2427 /* set dirty bit */
2428 cpu_physical_memory_set_dirty_flags(
2429 addr1, (0xff & ~CODE_DIRTY_FLAG));
2430 }
2431 }
2432 }
2433 }
2434
2435 /* warning: addr must be aligned */
2436 static inline void stl_phys_internal(hwaddr addr, uint32_t val,
2437 enum device_endian endian)
2438 {
2439 uint8_t *ptr;
2440 MemoryRegion *mr;
2441 hwaddr l = 4;
2442 hwaddr addr1;
2443
2444 mr = address_space_translate(&address_space_memory, addr, &addr1, &l,
2445 true);
2446 if (l < 4 || !memory_access_is_direct(mr, true)) {
2447 #if defined(TARGET_WORDS_BIGENDIAN)
2448 if (endian == DEVICE_LITTLE_ENDIAN) {
2449 val = bswap32(val);
2450 }
2451 #else
2452 if (endian == DEVICE_BIG_ENDIAN) {
2453 val = bswap32(val);
2454 }
2455 #endif
2456 io_mem_write(mr, addr1, val, 4);
2457 } else {
2458 /* RAM case */
2459 addr1 += memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK;
2460 ptr = qemu_get_ram_ptr(addr1);
2461 switch (endian) {
2462 case DEVICE_LITTLE_ENDIAN:
2463 stl_le_p(ptr, val);
2464 break;
2465 case DEVICE_BIG_ENDIAN:
2466 stl_be_p(ptr, val);
2467 break;
2468 default:
2469 stl_p(ptr, val);
2470 break;
2471 }
2472 invalidate_and_set_dirty(addr1, 4);
2473 }
2474 }
2475
2476 void stl_phys(hwaddr addr, uint32_t val)
2477 {
2478 stl_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN);
2479 }
2480
2481 void stl_le_phys(hwaddr addr, uint32_t val)
2482 {
2483 stl_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN);
2484 }
2485
2486 void stl_be_phys(hwaddr addr, uint32_t val)
2487 {
2488 stl_phys_internal(addr, val, DEVICE_BIG_ENDIAN);
2489 }
2490
2491 /* XXX: optimize */
2492 void stb_phys(hwaddr addr, uint32_t val)
2493 {
2494 uint8_t v = val;
2495 cpu_physical_memory_write(addr, &v, 1);
2496 }
2497
2498 /* warning: addr must be aligned */
2499 static inline void stw_phys_internal(hwaddr addr, uint32_t val,
2500 enum device_endian endian)
2501 {
2502 uint8_t *ptr;
2503 MemoryRegion *mr;
2504 hwaddr l = 2;
2505 hwaddr addr1;
2506
2507 mr = address_space_translate(&address_space_memory, addr, &addr1, &l,
2508 true);
2509 if (l < 2 || !memory_access_is_direct(mr, true)) {
2510 #if defined(TARGET_WORDS_BIGENDIAN)
2511 if (endian == DEVICE_LITTLE_ENDIAN) {
2512 val = bswap16(val);
2513 }
2514 #else
2515 if (endian == DEVICE_BIG_ENDIAN) {
2516 val = bswap16(val);
2517 }
2518 #endif
2519 io_mem_write(mr, addr1, val, 2);
2520 } else {
2521 /* RAM case */
2522 addr1 += memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK;
2523 ptr = qemu_get_ram_ptr(addr1);
2524 switch (endian) {
2525 case DEVICE_LITTLE_ENDIAN:
2526 stw_le_p(ptr, val);
2527 break;
2528 case DEVICE_BIG_ENDIAN:
2529 stw_be_p(ptr, val);
2530 break;
2531 default:
2532 stw_p(ptr, val);
2533 break;
2534 }
2535 invalidate_and_set_dirty(addr1, 2);
2536 }
2537 }
2538
2539 void stw_phys(hwaddr addr, uint32_t val)
2540 {
2541 stw_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN);
2542 }
2543
2544 void stw_le_phys(hwaddr addr, uint32_t val)
2545 {
2546 stw_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN);
2547 }
2548
2549 void stw_be_phys(hwaddr addr, uint32_t val)
2550 {
2551 stw_phys_internal(addr, val, DEVICE_BIG_ENDIAN);
2552 }
2553
2554 /* XXX: optimize */
2555 void stq_phys(hwaddr addr, uint64_t val)
2556 {
2557 val = tswap64(val);
2558 cpu_physical_memory_write(addr, &val, 8);
2559 }
2560
2561 void stq_le_phys(hwaddr addr, uint64_t val)
2562 {
2563 val = cpu_to_le64(val);
2564 cpu_physical_memory_write(addr, &val, 8);
2565 }
2566
2567 void stq_be_phys(hwaddr addr, uint64_t val)
2568 {
2569 val = cpu_to_be64(val);
2570 cpu_physical_memory_write(addr, &val, 8);
2571 }
2572
2573 /* virtual memory access for debug (includes writing to ROM) */
2574 int cpu_memory_rw_debug(CPUArchState *env, target_ulong addr,
2575 uint8_t *buf, int len, int is_write)
2576 {
2577 int l;
2578 hwaddr phys_addr;
2579 target_ulong page;
2580
2581 while (len > 0) {
2582 page = addr & TARGET_PAGE_MASK;
2583 phys_addr = cpu_get_phys_page_debug(env, page);
2584 /* if no physical page mapped, return an error */
2585 if (phys_addr == -1)
2586 return -1;
2587 l = (page + TARGET_PAGE_SIZE) - addr;
2588 if (l > len)
2589 l = len;
2590 phys_addr += (addr & ~TARGET_PAGE_MASK);
2591 if (is_write)
2592 cpu_physical_memory_write_rom(phys_addr, buf, l);
2593 else
2594 cpu_physical_memory_rw(phys_addr, buf, l, is_write);
2595 len -= l;
2596 buf += l;
2597 addr += l;
2598 }
2599 return 0;
2600 }
2601 #endif
2602
2603 #if !defined(CONFIG_USER_ONLY)
2604
2605 /*
2606 * A helper function for the _utterly broken_ virtio device model to find out if
2607 * it's running on a big endian machine. Don't do this at home kids!
2608 */
2609 bool virtio_is_big_endian(void);
2610 bool virtio_is_big_endian(void)
2611 {
2612 #if defined(TARGET_WORDS_BIGENDIAN)
2613 return true;
2614 #else
2615 return false;
2616 #endif
2617 }
2618
2619 #endif
2620
2621 #ifndef CONFIG_USER_ONLY
2622 bool cpu_physical_memory_is_io(hwaddr phys_addr)
2623 {
2624 MemoryRegion*mr;
2625 hwaddr l = 1;
2626
2627 mr = address_space_translate(&address_space_memory,
2628 phys_addr, &phys_addr, &l, false);
2629
2630 return !(memory_region_is_ram(mr) ||
2631 memory_region_is_romd(mr));
2632 }
2633
2634 void qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque)
2635 {
2636 RAMBlock *block;
2637
2638 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
2639 func(block->host, block->offset, block->length, opaque);
2640 }
2641 }
2642 #endif
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