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1 | /* | |
2 | * QEMU KVM support | |
3 | * | |
4 | * Copyright IBM, Corp. 2008 | |
5 | * Red Hat, Inc. 2008 | |
6 | * | |
7 | * Authors: | |
8 | * Anthony Liguori <aliguori@us.ibm.com> | |
9 | * Glauber Costa <gcosta@redhat.com> | |
10 | * | |
11 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
12 | * See the COPYING file in the top-level directory. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <sys/types.h> | |
17 | #include <sys/ioctl.h> | |
18 | #include <sys/mman.h> | |
19 | #include <stdarg.h> | |
20 | ||
21 | #include <linux/kvm.h> | |
22 | ||
23 | #include "qemu-common.h" | |
24 | #include "qemu-barrier.h" | |
25 | #include "sysemu.h" | |
26 | #include "hw/hw.h" | |
27 | #include "hw/msi.h" | |
28 | #include "gdbstub.h" | |
29 | #include "kvm.h" | |
30 | #include "bswap.h" | |
31 | #include "memory.h" | |
32 | #include "exec-memory.h" | |
33 | ||
34 | /* This check must be after config-host.h is included */ | |
35 | #ifdef CONFIG_EVENTFD | |
36 | #include <sys/eventfd.h> | |
37 | #endif | |
38 | ||
39 | /* KVM uses PAGE_SIZE in its definition of COALESCED_MMIO_MAX */ | |
40 | #define PAGE_SIZE TARGET_PAGE_SIZE | |
41 | ||
42 | //#define DEBUG_KVM | |
43 | ||
44 | #ifdef DEBUG_KVM | |
45 | #define DPRINTF(fmt, ...) \ | |
46 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
47 | #else | |
48 | #define DPRINTF(fmt, ...) \ | |
49 | do { } while (0) | |
50 | #endif | |
51 | ||
52 | #define KVM_MSI_HASHTAB_SIZE 256 | |
53 | ||
54 | typedef struct KVMSlot | |
55 | { | |
56 | target_phys_addr_t start_addr; | |
57 | ram_addr_t memory_size; | |
58 | void *ram; | |
59 | int slot; | |
60 | int flags; | |
61 | } KVMSlot; | |
62 | ||
63 | typedef struct kvm_dirty_log KVMDirtyLog; | |
64 | ||
65 | typedef struct KVMMSIRoute { | |
66 | struct kvm_irq_routing_entry kroute; | |
67 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
68 | } KVMMSIRoute; | |
69 | ||
70 | struct KVMState | |
71 | { | |
72 | KVMSlot slots[32]; | |
73 | int fd; | |
74 | int vmfd; | |
75 | int coalesced_mmio; | |
76 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; | |
77 | bool coalesced_flush_in_progress; | |
78 | int broken_set_mem_region; | |
79 | int migration_log; | |
80 | int vcpu_events; | |
81 | int robust_singlestep; | |
82 | int debugregs; | |
83 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
84 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; | |
85 | #endif | |
86 | int pit_state2; | |
87 | int xsave, xcrs; | |
88 | int many_ioeventfds; | |
89 | /* The man page (and posix) say ioctl numbers are signed int, but | |
90 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
91 | * unsigned, and treating them as signed here can break things */ | |
92 | unsigned irqchip_inject_ioctl; | |
93 | #ifdef KVM_CAP_IRQ_ROUTING | |
94 | struct kvm_irq_routing *irq_routes; | |
95 | int nr_allocated_irq_routes; | |
96 | uint32_t *used_gsi_bitmap; | |
97 | unsigned int gsi_count; | |
98 | QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; | |
99 | bool direct_msi; | |
100 | #endif | |
101 | }; | |
102 | ||
103 | KVMState *kvm_state; | |
104 | bool kvm_kernel_irqchip; | |
105 | ||
106 | static const KVMCapabilityInfo kvm_required_capabilites[] = { | |
107 | KVM_CAP_INFO(USER_MEMORY), | |
108 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
109 | KVM_CAP_LAST_INFO | |
110 | }; | |
111 | ||
112 | static KVMSlot *kvm_alloc_slot(KVMState *s) | |
113 | { | |
114 | int i; | |
115 | ||
116 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
117 | if (s->slots[i].memory_size == 0) { | |
118 | return &s->slots[i]; | |
119 | } | |
120 | } | |
121 | ||
122 | fprintf(stderr, "%s: no free slot available\n", __func__); | |
123 | abort(); | |
124 | } | |
125 | ||
126 | static KVMSlot *kvm_lookup_matching_slot(KVMState *s, | |
127 | target_phys_addr_t start_addr, | |
128 | target_phys_addr_t end_addr) | |
129 | { | |
130 | int i; | |
131 | ||
132 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
133 | KVMSlot *mem = &s->slots[i]; | |
134 | ||
135 | if (start_addr == mem->start_addr && | |
136 | end_addr == mem->start_addr + mem->memory_size) { | |
137 | return mem; | |
138 | } | |
139 | } | |
140 | ||
141 | return NULL; | |
142 | } | |
143 | ||
144 | /* | |
145 | * Find overlapping slot with lowest start address | |
146 | */ | |
147 | static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s, | |
148 | target_phys_addr_t start_addr, | |
149 | target_phys_addr_t end_addr) | |
150 | { | |
151 | KVMSlot *found = NULL; | |
152 | int i; | |
153 | ||
154 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
155 | KVMSlot *mem = &s->slots[i]; | |
156 | ||
157 | if (mem->memory_size == 0 || | |
158 | (found && found->start_addr < mem->start_addr)) { | |
159 | continue; | |
160 | } | |
161 | ||
162 | if (end_addr > mem->start_addr && | |
163 | start_addr < mem->start_addr + mem->memory_size) { | |
164 | found = mem; | |
165 | } | |
166 | } | |
167 | ||
168 | return found; | |
169 | } | |
170 | ||
171 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, | |
172 | target_phys_addr_t *phys_addr) | |
173 | { | |
174 | int i; | |
175 | ||
176 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
177 | KVMSlot *mem = &s->slots[i]; | |
178 | ||
179 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { | |
180 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
181 | return 1; | |
182 | } | |
183 | } | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) | |
189 | { | |
190 | struct kvm_userspace_memory_region mem; | |
191 | ||
192 | mem.slot = slot->slot; | |
193 | mem.guest_phys_addr = slot->start_addr; | |
194 | mem.memory_size = slot->memory_size; | |
195 | mem.userspace_addr = (unsigned long)slot->ram; | |
196 | mem.flags = slot->flags; | |
197 | if (s->migration_log) { | |
198 | mem.flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
199 | } | |
200 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
201 | } | |
202 | ||
203 | static void kvm_reset_vcpu(void *opaque) | |
204 | { | |
205 | CPUArchState *env = opaque; | |
206 | ||
207 | kvm_arch_reset_vcpu(env); | |
208 | } | |
209 | ||
210 | int kvm_init_vcpu(CPUArchState *env) | |
211 | { | |
212 | KVMState *s = kvm_state; | |
213 | long mmap_size; | |
214 | int ret; | |
215 | ||
216 | DPRINTF("kvm_init_vcpu\n"); | |
217 | ||
218 | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); | |
219 | if (ret < 0) { | |
220 | DPRINTF("kvm_create_vcpu failed\n"); | |
221 | goto err; | |
222 | } | |
223 | ||
224 | env->kvm_fd = ret; | |
225 | env->kvm_state = s; | |
226 | env->kvm_vcpu_dirty = 1; | |
227 | ||
228 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
229 | if (mmap_size < 0) { | |
230 | ret = mmap_size; | |
231 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
232 | goto err; | |
233 | } | |
234 | ||
235 | env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
236 | env->kvm_fd, 0); | |
237 | if (env->kvm_run == MAP_FAILED) { | |
238 | ret = -errno; | |
239 | DPRINTF("mmap'ing vcpu state failed\n"); | |
240 | goto err; | |
241 | } | |
242 | ||
243 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { | |
244 | s->coalesced_mmio_ring = | |
245 | (void *)env->kvm_run + s->coalesced_mmio * PAGE_SIZE; | |
246 | } | |
247 | ||
248 | ret = kvm_arch_init_vcpu(env); | |
249 | if (ret == 0) { | |
250 | qemu_register_reset(kvm_reset_vcpu, env); | |
251 | kvm_arch_reset_vcpu(env); | |
252 | } | |
253 | err: | |
254 | return ret; | |
255 | } | |
256 | ||
257 | /* | |
258 | * dirty pages logging control | |
259 | */ | |
260 | ||
261 | static int kvm_mem_flags(KVMState *s, bool log_dirty) | |
262 | { | |
263 | return log_dirty ? KVM_MEM_LOG_DIRTY_PAGES : 0; | |
264 | } | |
265 | ||
266 | static int kvm_slot_dirty_pages_log_change(KVMSlot *mem, bool log_dirty) | |
267 | { | |
268 | KVMState *s = kvm_state; | |
269 | int flags, mask = KVM_MEM_LOG_DIRTY_PAGES; | |
270 | int old_flags; | |
271 | ||
272 | old_flags = mem->flags; | |
273 | ||
274 | flags = (mem->flags & ~mask) | kvm_mem_flags(s, log_dirty); | |
275 | mem->flags = flags; | |
276 | ||
277 | /* If nothing changed effectively, no need to issue ioctl */ | |
278 | if (s->migration_log) { | |
279 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
280 | } | |
281 | ||
282 | if (flags == old_flags) { | |
283 | return 0; | |
284 | } | |
285 | ||
286 | return kvm_set_user_memory_region(s, mem); | |
287 | } | |
288 | ||
289 | static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, | |
290 | ram_addr_t size, bool log_dirty) | |
291 | { | |
292 | KVMState *s = kvm_state; | |
293 | KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); | |
294 | ||
295 | if (mem == NULL) { | |
296 | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" | |
297 | TARGET_FMT_plx "\n", __func__, phys_addr, | |
298 | (target_phys_addr_t)(phys_addr + size - 1)); | |
299 | return -EINVAL; | |
300 | } | |
301 | return kvm_slot_dirty_pages_log_change(mem, log_dirty); | |
302 | } | |
303 | ||
304 | static void kvm_log_start(MemoryListener *listener, | |
305 | MemoryRegionSection *section) | |
306 | { | |
307 | int r; | |
308 | ||
309 | r = kvm_dirty_pages_log_change(section->offset_within_address_space, | |
310 | section->size, true); | |
311 | if (r < 0) { | |
312 | abort(); | |
313 | } | |
314 | } | |
315 | ||
316 | static void kvm_log_stop(MemoryListener *listener, | |
317 | MemoryRegionSection *section) | |
318 | { | |
319 | int r; | |
320 | ||
321 | r = kvm_dirty_pages_log_change(section->offset_within_address_space, | |
322 | section->size, false); | |
323 | if (r < 0) { | |
324 | abort(); | |
325 | } | |
326 | } | |
327 | ||
328 | static int kvm_set_migration_log(int enable) | |
329 | { | |
330 | KVMState *s = kvm_state; | |
331 | KVMSlot *mem; | |
332 | int i, err; | |
333 | ||
334 | s->migration_log = enable; | |
335 | ||
336 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
337 | mem = &s->slots[i]; | |
338 | ||
339 | if (!mem->memory_size) { | |
340 | continue; | |
341 | } | |
342 | if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) { | |
343 | continue; | |
344 | } | |
345 | err = kvm_set_user_memory_region(s, mem); | |
346 | if (err) { | |
347 | return err; | |
348 | } | |
349 | } | |
350 | return 0; | |
351 | } | |
352 | ||
353 | /* get kvm's dirty pages bitmap and update qemu's */ | |
354 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, | |
355 | unsigned long *bitmap) | |
356 | { | |
357 | unsigned int i, j; | |
358 | unsigned long page_number, c; | |
359 | target_phys_addr_t addr, addr1; | |
360 | unsigned int len = ((section->size / TARGET_PAGE_SIZE) + HOST_LONG_BITS - 1) / HOST_LONG_BITS; | |
361 | unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE; | |
362 | ||
363 | /* | |
364 | * bitmap-traveling is faster than memory-traveling (for addr...) | |
365 | * especially when most of the memory is not dirty. | |
366 | */ | |
367 | for (i = 0; i < len; i++) { | |
368 | if (bitmap[i] != 0) { | |
369 | c = leul_to_cpu(bitmap[i]); | |
370 | do { | |
371 | j = ffsl(c) - 1; | |
372 | c &= ~(1ul << j); | |
373 | page_number = (i * HOST_LONG_BITS + j) * hpratio; | |
374 | addr1 = page_number * TARGET_PAGE_SIZE; | |
375 | addr = section->offset_within_region + addr1; | |
376 | memory_region_set_dirty(section->mr, addr, | |
377 | TARGET_PAGE_SIZE * hpratio); | |
378 | } while (c != 0); | |
379 | } | |
380 | } | |
381 | return 0; | |
382 | } | |
383 | ||
384 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) | |
385 | ||
386 | /** | |
387 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
388 | * This function updates qemu's dirty bitmap using | |
389 | * memory_region_set_dirty(). This means all bits are set | |
390 | * to dirty. | |
391 | * | |
392 | * @start_add: start of logged region. | |
393 | * @end_addr: end of logged region. | |
394 | */ | |
395 | static int kvm_physical_sync_dirty_bitmap(MemoryRegionSection *section) | |
396 | { | |
397 | KVMState *s = kvm_state; | |
398 | unsigned long size, allocated_size = 0; | |
399 | KVMDirtyLog d; | |
400 | KVMSlot *mem; | |
401 | int ret = 0; | |
402 | target_phys_addr_t start_addr = section->offset_within_address_space; | |
403 | target_phys_addr_t end_addr = start_addr + section->size; | |
404 | ||
405 | d.dirty_bitmap = NULL; | |
406 | while (start_addr < end_addr) { | |
407 | mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); | |
408 | if (mem == NULL) { | |
409 | break; | |
410 | } | |
411 | ||
412 | /* XXX bad kernel interface alert | |
413 | * For dirty bitmap, kernel allocates array of size aligned to | |
414 | * bits-per-long. But for case when the kernel is 64bits and | |
415 | * the userspace is 32bits, userspace can't align to the same | |
416 | * bits-per-long, since sizeof(long) is different between kernel | |
417 | * and user space. This way, userspace will provide buffer which | |
418 | * may be 4 bytes less than the kernel will use, resulting in | |
419 | * userspace memory corruption (which is not detectable by valgrind | |
420 | * too, in most cases). | |
421 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
422 | * a hope that sizeof(long) wont become >8 any time soon. | |
423 | */ | |
424 | size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
425 | /*HOST_LONG_BITS*/ 64) / 8; | |
426 | if (!d.dirty_bitmap) { | |
427 | d.dirty_bitmap = g_malloc(size); | |
428 | } else if (size > allocated_size) { | |
429 | d.dirty_bitmap = g_realloc(d.dirty_bitmap, size); | |
430 | } | |
431 | allocated_size = size; | |
432 | memset(d.dirty_bitmap, 0, allocated_size); | |
433 | ||
434 | d.slot = mem->slot; | |
435 | ||
436 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { | |
437 | DPRINTF("ioctl failed %d\n", errno); | |
438 | ret = -1; | |
439 | break; | |
440 | } | |
441 | ||
442 | kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); | |
443 | start_addr = mem->start_addr + mem->memory_size; | |
444 | } | |
445 | g_free(d.dirty_bitmap); | |
446 | ||
447 | return ret; | |
448 | } | |
449 | ||
450 | int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) | |
451 | { | |
452 | int ret = -ENOSYS; | |
453 | KVMState *s = kvm_state; | |
454 | ||
455 | if (s->coalesced_mmio) { | |
456 | struct kvm_coalesced_mmio_zone zone; | |
457 | ||
458 | zone.addr = start; | |
459 | zone.size = size; | |
460 | zone.pad = 0; | |
461 | ||
462 | ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
463 | } | |
464 | ||
465 | return ret; | |
466 | } | |
467 | ||
468 | int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) | |
469 | { | |
470 | int ret = -ENOSYS; | |
471 | KVMState *s = kvm_state; | |
472 | ||
473 | if (s->coalesced_mmio) { | |
474 | struct kvm_coalesced_mmio_zone zone; | |
475 | ||
476 | zone.addr = start; | |
477 | zone.size = size; | |
478 | zone.pad = 0; | |
479 | ||
480 | ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
481 | } | |
482 | ||
483 | return ret; | |
484 | } | |
485 | ||
486 | int kvm_check_extension(KVMState *s, unsigned int extension) | |
487 | { | |
488 | int ret; | |
489 | ||
490 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
491 | if (ret < 0) { | |
492 | ret = 0; | |
493 | } | |
494 | ||
495 | return ret; | |
496 | } | |
497 | ||
498 | static int kvm_check_many_ioeventfds(void) | |
499 | { | |
500 | /* Userspace can use ioeventfd for io notification. This requires a host | |
501 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
502 | * support SIGIO it cannot interrupt the vcpu. | |
503 | * | |
504 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
505 | * can avoid creating too many ioeventfds. | |
506 | */ | |
507 | #if defined(CONFIG_EVENTFD) | |
508 | int ioeventfds[7]; | |
509 | int i, ret = 0; | |
510 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
511 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
512 | if (ioeventfds[i] < 0) { | |
513 | break; | |
514 | } | |
515 | ret = kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, true); | |
516 | if (ret < 0) { | |
517 | close(ioeventfds[i]); | |
518 | break; | |
519 | } | |
520 | } | |
521 | ||
522 | /* Decide whether many devices are supported or not */ | |
523 | ret = i == ARRAY_SIZE(ioeventfds); | |
524 | ||
525 | while (i-- > 0) { | |
526 | kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, false); | |
527 | close(ioeventfds[i]); | |
528 | } | |
529 | return ret; | |
530 | #else | |
531 | return 0; | |
532 | #endif | |
533 | } | |
534 | ||
535 | static const KVMCapabilityInfo * | |
536 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
537 | { | |
538 | while (list->name) { | |
539 | if (!kvm_check_extension(s, list->value)) { | |
540 | return list; | |
541 | } | |
542 | list++; | |
543 | } | |
544 | return NULL; | |
545 | } | |
546 | ||
547 | static void kvm_set_phys_mem(MemoryRegionSection *section, bool add) | |
548 | { | |
549 | KVMState *s = kvm_state; | |
550 | KVMSlot *mem, old; | |
551 | int err; | |
552 | MemoryRegion *mr = section->mr; | |
553 | bool log_dirty = memory_region_is_logging(mr); | |
554 | target_phys_addr_t start_addr = section->offset_within_address_space; | |
555 | ram_addr_t size = section->size; | |
556 | void *ram = NULL; | |
557 | unsigned delta; | |
558 | ||
559 | /* kvm works in page size chunks, but the function may be called | |
560 | with sub-page size and unaligned start address. */ | |
561 | delta = TARGET_PAGE_ALIGN(size) - size; | |
562 | if (delta > size) { | |
563 | return; | |
564 | } | |
565 | start_addr += delta; | |
566 | size -= delta; | |
567 | size &= TARGET_PAGE_MASK; | |
568 | if (!size || (start_addr & ~TARGET_PAGE_MASK)) { | |
569 | return; | |
570 | } | |
571 | ||
572 | if (!memory_region_is_ram(mr)) { | |
573 | return; | |
574 | } | |
575 | ||
576 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta; | |
577 | ||
578 | while (1) { | |
579 | mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); | |
580 | if (!mem) { | |
581 | break; | |
582 | } | |
583 | ||
584 | if (add && start_addr >= mem->start_addr && | |
585 | (start_addr + size <= mem->start_addr + mem->memory_size) && | |
586 | (ram - start_addr == mem->ram - mem->start_addr)) { | |
587 | /* The new slot fits into the existing one and comes with | |
588 | * identical parameters - update flags and done. */ | |
589 | kvm_slot_dirty_pages_log_change(mem, log_dirty); | |
590 | return; | |
591 | } | |
592 | ||
593 | old = *mem; | |
594 | ||
595 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
596 | kvm_physical_sync_dirty_bitmap(section); | |
597 | } | |
598 | ||
599 | /* unregister the overlapping slot */ | |
600 | mem->memory_size = 0; | |
601 | err = kvm_set_user_memory_region(s, mem); | |
602 | if (err) { | |
603 | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n", | |
604 | __func__, strerror(-err)); | |
605 | abort(); | |
606 | } | |
607 | ||
608 | /* Workaround for older KVM versions: we can't join slots, even not by | |
609 | * unregistering the previous ones and then registering the larger | |
610 | * slot. We have to maintain the existing fragmentation. Sigh. | |
611 | * | |
612 | * This workaround assumes that the new slot starts at the same | |
613 | * address as the first existing one. If not or if some overlapping | |
614 | * slot comes around later, we will fail (not seen in practice so far) | |
615 | * - and actually require a recent KVM version. */ | |
616 | if (s->broken_set_mem_region && | |
617 | old.start_addr == start_addr && old.memory_size < size && add) { | |
618 | mem = kvm_alloc_slot(s); | |
619 | mem->memory_size = old.memory_size; | |
620 | mem->start_addr = old.start_addr; | |
621 | mem->ram = old.ram; | |
622 | mem->flags = kvm_mem_flags(s, log_dirty); | |
623 | ||
624 | err = kvm_set_user_memory_region(s, mem); | |
625 | if (err) { | |
626 | fprintf(stderr, "%s: error updating slot: %s\n", __func__, | |
627 | strerror(-err)); | |
628 | abort(); | |
629 | } | |
630 | ||
631 | start_addr += old.memory_size; | |
632 | ram += old.memory_size; | |
633 | size -= old.memory_size; | |
634 | continue; | |
635 | } | |
636 | ||
637 | /* register prefix slot */ | |
638 | if (old.start_addr < start_addr) { | |
639 | mem = kvm_alloc_slot(s); | |
640 | mem->memory_size = start_addr - old.start_addr; | |
641 | mem->start_addr = old.start_addr; | |
642 | mem->ram = old.ram; | |
643 | mem->flags = kvm_mem_flags(s, log_dirty); | |
644 | ||
645 | err = kvm_set_user_memory_region(s, mem); | |
646 | if (err) { | |
647 | fprintf(stderr, "%s: error registering prefix slot: %s\n", | |
648 | __func__, strerror(-err)); | |
649 | #ifdef TARGET_PPC | |
650 | fprintf(stderr, "%s: This is probably because your kernel's " \ | |
651 | "PAGE_SIZE is too big. Please try to use 4k " \ | |
652 | "PAGE_SIZE!\n", __func__); | |
653 | #endif | |
654 | abort(); | |
655 | } | |
656 | } | |
657 | ||
658 | /* register suffix slot */ | |
659 | if (old.start_addr + old.memory_size > start_addr + size) { | |
660 | ram_addr_t size_delta; | |
661 | ||
662 | mem = kvm_alloc_slot(s); | |
663 | mem->start_addr = start_addr + size; | |
664 | size_delta = mem->start_addr - old.start_addr; | |
665 | mem->memory_size = old.memory_size - size_delta; | |
666 | mem->ram = old.ram + size_delta; | |
667 | mem->flags = kvm_mem_flags(s, log_dirty); | |
668 | ||
669 | err = kvm_set_user_memory_region(s, mem); | |
670 | if (err) { | |
671 | fprintf(stderr, "%s: error registering suffix slot: %s\n", | |
672 | __func__, strerror(-err)); | |
673 | abort(); | |
674 | } | |
675 | } | |
676 | } | |
677 | ||
678 | /* in case the KVM bug workaround already "consumed" the new slot */ | |
679 | if (!size) { | |
680 | return; | |
681 | } | |
682 | if (!add) { | |
683 | return; | |
684 | } | |
685 | mem = kvm_alloc_slot(s); | |
686 | mem->memory_size = size; | |
687 | mem->start_addr = start_addr; | |
688 | mem->ram = ram; | |
689 | mem->flags = kvm_mem_flags(s, log_dirty); | |
690 | ||
691 | err = kvm_set_user_memory_region(s, mem); | |
692 | if (err) { | |
693 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
694 | strerror(-err)); | |
695 | abort(); | |
696 | } | |
697 | } | |
698 | ||
699 | static void kvm_begin(MemoryListener *listener) | |
700 | { | |
701 | } | |
702 | ||
703 | static void kvm_commit(MemoryListener *listener) | |
704 | { | |
705 | } | |
706 | ||
707 | static void kvm_region_add(MemoryListener *listener, | |
708 | MemoryRegionSection *section) | |
709 | { | |
710 | kvm_set_phys_mem(section, true); | |
711 | } | |
712 | ||
713 | static void kvm_region_del(MemoryListener *listener, | |
714 | MemoryRegionSection *section) | |
715 | { | |
716 | kvm_set_phys_mem(section, false); | |
717 | } | |
718 | ||
719 | static void kvm_region_nop(MemoryListener *listener, | |
720 | MemoryRegionSection *section) | |
721 | { | |
722 | } | |
723 | ||
724 | static void kvm_log_sync(MemoryListener *listener, | |
725 | MemoryRegionSection *section) | |
726 | { | |
727 | int r; | |
728 | ||
729 | r = kvm_physical_sync_dirty_bitmap(section); | |
730 | if (r < 0) { | |
731 | abort(); | |
732 | } | |
733 | } | |
734 | ||
735 | static void kvm_log_global_start(struct MemoryListener *listener) | |
736 | { | |
737 | int r; | |
738 | ||
739 | r = kvm_set_migration_log(1); | |
740 | assert(r >= 0); | |
741 | } | |
742 | ||
743 | static void kvm_log_global_stop(struct MemoryListener *listener) | |
744 | { | |
745 | int r; | |
746 | ||
747 | r = kvm_set_migration_log(0); | |
748 | assert(r >= 0); | |
749 | } | |
750 | ||
751 | static void kvm_mem_ioeventfd_add(MemoryRegionSection *section, | |
752 | bool match_data, uint64_t data, int fd) | |
753 | { | |
754 | int r; | |
755 | ||
756 | assert(match_data && section->size <= 8); | |
757 | ||
758 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, | |
759 | data, true, section->size); | |
760 | if (r < 0) { | |
761 | abort(); | |
762 | } | |
763 | } | |
764 | ||
765 | static void kvm_mem_ioeventfd_del(MemoryRegionSection *section, | |
766 | bool match_data, uint64_t data, int fd) | |
767 | { | |
768 | int r; | |
769 | ||
770 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, | |
771 | data, false, section->size); | |
772 | if (r < 0) { | |
773 | abort(); | |
774 | } | |
775 | } | |
776 | ||
777 | static void kvm_io_ioeventfd_add(MemoryRegionSection *section, | |
778 | bool match_data, uint64_t data, int fd) | |
779 | { | |
780 | int r; | |
781 | ||
782 | assert(match_data && section->size == 2); | |
783 | ||
784 | r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space, | |
785 | data, true); | |
786 | if (r < 0) { | |
787 | abort(); | |
788 | } | |
789 | } | |
790 | ||
791 | static void kvm_io_ioeventfd_del(MemoryRegionSection *section, | |
792 | bool match_data, uint64_t data, int fd) | |
793 | ||
794 | { | |
795 | int r; | |
796 | ||
797 | r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space, | |
798 | data, false); | |
799 | if (r < 0) { | |
800 | abort(); | |
801 | } | |
802 | } | |
803 | ||
804 | static void kvm_eventfd_add(MemoryListener *listener, | |
805 | MemoryRegionSection *section, | |
806 | bool match_data, uint64_t data, int fd) | |
807 | { | |
808 | if (section->address_space == get_system_memory()) { | |
809 | kvm_mem_ioeventfd_add(section, match_data, data, fd); | |
810 | } else { | |
811 | kvm_io_ioeventfd_add(section, match_data, data, fd); | |
812 | } | |
813 | } | |
814 | ||
815 | static void kvm_eventfd_del(MemoryListener *listener, | |
816 | MemoryRegionSection *section, | |
817 | bool match_data, uint64_t data, int fd) | |
818 | { | |
819 | if (section->address_space == get_system_memory()) { | |
820 | kvm_mem_ioeventfd_del(section, match_data, data, fd); | |
821 | } else { | |
822 | kvm_io_ioeventfd_del(section, match_data, data, fd); | |
823 | } | |
824 | } | |
825 | ||
826 | static MemoryListener kvm_memory_listener = { | |
827 | .begin = kvm_begin, | |
828 | .commit = kvm_commit, | |
829 | .region_add = kvm_region_add, | |
830 | .region_del = kvm_region_del, | |
831 | .region_nop = kvm_region_nop, | |
832 | .log_start = kvm_log_start, | |
833 | .log_stop = kvm_log_stop, | |
834 | .log_sync = kvm_log_sync, | |
835 | .log_global_start = kvm_log_global_start, | |
836 | .log_global_stop = kvm_log_global_stop, | |
837 | .eventfd_add = kvm_eventfd_add, | |
838 | .eventfd_del = kvm_eventfd_del, | |
839 | .priority = 10, | |
840 | }; | |
841 | ||
842 | static void kvm_handle_interrupt(CPUArchState *env, int mask) | |
843 | { | |
844 | env->interrupt_request |= mask; | |
845 | ||
846 | if (!qemu_cpu_is_self(env)) { | |
847 | qemu_cpu_kick(env); | |
848 | } | |
849 | } | |
850 | ||
851 | int kvm_irqchip_set_irq(KVMState *s, int irq, int level) | |
852 | { | |
853 | struct kvm_irq_level event; | |
854 | int ret; | |
855 | ||
856 | assert(kvm_irqchip_in_kernel()); | |
857 | ||
858 | event.level = level; | |
859 | event.irq = irq; | |
860 | ret = kvm_vm_ioctl(s, s->irqchip_inject_ioctl, &event); | |
861 | if (ret < 0) { | |
862 | perror("kvm_set_irqchip_line"); | |
863 | abort(); | |
864 | } | |
865 | ||
866 | return (s->irqchip_inject_ioctl == KVM_IRQ_LINE) ? 1 : event.status; | |
867 | } | |
868 | ||
869 | #ifdef KVM_CAP_IRQ_ROUTING | |
870 | static void set_gsi(KVMState *s, unsigned int gsi) | |
871 | { | |
872 | s->used_gsi_bitmap[gsi / 32] |= 1U << (gsi % 32); | |
873 | } | |
874 | ||
875 | static void clear_gsi(KVMState *s, unsigned int gsi) | |
876 | { | |
877 | s->used_gsi_bitmap[gsi / 32] &= ~(1U << (gsi % 32)); | |
878 | } | |
879 | ||
880 | static void kvm_init_irq_routing(KVMState *s) | |
881 | { | |
882 | int gsi_count, i; | |
883 | ||
884 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING); | |
885 | if (gsi_count > 0) { | |
886 | unsigned int gsi_bits, i; | |
887 | ||
888 | /* Round up so we can search ints using ffs */ | |
889 | gsi_bits = ALIGN(gsi_count, 32); | |
890 | s->used_gsi_bitmap = g_malloc0(gsi_bits / 8); | |
891 | s->gsi_count = gsi_count; | |
892 | ||
893 | /* Mark any over-allocated bits as already in use */ | |
894 | for (i = gsi_count; i < gsi_bits; i++) { | |
895 | set_gsi(s, i); | |
896 | } | |
897 | } | |
898 | ||
899 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
900 | s->nr_allocated_irq_routes = 0; | |
901 | ||
902 | if (!s->direct_msi) { | |
903 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { | |
904 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
905 | } | |
906 | } | |
907 | ||
908 | kvm_arch_init_irq_routing(s); | |
909 | } | |
910 | ||
911 | static void kvm_irqchip_commit_routes(KVMState *s) | |
912 | { | |
913 | int ret; | |
914 | ||
915 | s->irq_routes->flags = 0; | |
916 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); | |
917 | assert(ret == 0); | |
918 | } | |
919 | ||
920 | static void kvm_add_routing_entry(KVMState *s, | |
921 | struct kvm_irq_routing_entry *entry) | |
922 | { | |
923 | struct kvm_irq_routing_entry *new; | |
924 | int n, size; | |
925 | ||
926 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
927 | n = s->nr_allocated_irq_routes * 2; | |
928 | if (n < 64) { | |
929 | n = 64; | |
930 | } | |
931 | size = sizeof(struct kvm_irq_routing); | |
932 | size += n * sizeof(*new); | |
933 | s->irq_routes = g_realloc(s->irq_routes, size); | |
934 | s->nr_allocated_irq_routes = n; | |
935 | } | |
936 | n = s->irq_routes->nr++; | |
937 | new = &s->irq_routes->entries[n]; | |
938 | memset(new, 0, sizeof(*new)); | |
939 | new->gsi = entry->gsi; | |
940 | new->type = entry->type; | |
941 | new->flags = entry->flags; | |
942 | new->u = entry->u; | |
943 | ||
944 | set_gsi(s, entry->gsi); | |
945 | ||
946 | kvm_irqchip_commit_routes(s); | |
947 | } | |
948 | ||
949 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) | |
950 | { | |
951 | struct kvm_irq_routing_entry e; | |
952 | ||
953 | assert(pin < s->gsi_count); | |
954 | ||
955 | e.gsi = irq; | |
956 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
957 | e.flags = 0; | |
958 | e.u.irqchip.irqchip = irqchip; | |
959 | e.u.irqchip.pin = pin; | |
960 | kvm_add_routing_entry(s, &e); | |
961 | } | |
962 | ||
963 | void kvm_irqchip_release_virq(KVMState *s, int virq) | |
964 | { | |
965 | struct kvm_irq_routing_entry *e; | |
966 | int i; | |
967 | ||
968 | for (i = 0; i < s->irq_routes->nr; i++) { | |
969 | e = &s->irq_routes->entries[i]; | |
970 | if (e->gsi == virq) { | |
971 | s->irq_routes->nr--; | |
972 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
973 | } | |
974 | } | |
975 | clear_gsi(s, virq); | |
976 | ||
977 | kvm_irqchip_commit_routes(s); | |
978 | } | |
979 | ||
980 | static unsigned int kvm_hash_msi(uint32_t data) | |
981 | { | |
982 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
983 | * repeat the mistake of not providing a direct MSI injection API. */ | |
984 | return data & 0xff; | |
985 | } | |
986 | ||
987 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
988 | { | |
989 | KVMMSIRoute *route, *next; | |
990 | unsigned int hash; | |
991 | ||
992 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
993 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
994 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
995 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
996 | g_free(route); | |
997 | } | |
998 | } | |
999 | } | |
1000 | ||
1001 | static int kvm_irqchip_get_virq(KVMState *s) | |
1002 | { | |
1003 | uint32_t *word = s->used_gsi_bitmap; | |
1004 | int max_words = ALIGN(s->gsi_count, 32) / 32; | |
1005 | int i, bit; | |
1006 | bool retry = true; | |
1007 | ||
1008 | again: | |
1009 | /* Return the lowest unused GSI in the bitmap */ | |
1010 | for (i = 0; i < max_words; i++) { | |
1011 | bit = ffs(~word[i]); | |
1012 | if (!bit) { | |
1013 | continue; | |
1014 | } | |
1015 | ||
1016 | return bit - 1 + i * 32; | |
1017 | } | |
1018 | if (!s->direct_msi && retry) { | |
1019 | retry = false; | |
1020 | kvm_flush_dynamic_msi_routes(s); | |
1021 | goto again; | |
1022 | } | |
1023 | return -ENOSPC; | |
1024 | ||
1025 | } | |
1026 | ||
1027 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1028 | { | |
1029 | unsigned int hash = kvm_hash_msi(msg.data); | |
1030 | KVMMSIRoute *route; | |
1031 | ||
1032 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1033 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1034 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
1035 | route->kroute.u.msi.data == msg.data) { | |
1036 | return route; | |
1037 | } | |
1038 | } | |
1039 | return NULL; | |
1040 | } | |
1041 | ||
1042 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1043 | { | |
1044 | struct kvm_msi msi; | |
1045 | KVMMSIRoute *route; | |
1046 | ||
1047 | if (s->direct_msi) { | |
1048 | msi.address_lo = (uint32_t)msg.address; | |
1049 | msi.address_hi = msg.address >> 32; | |
1050 | msi.data = msg.data; | |
1051 | msi.flags = 0; | |
1052 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1053 | ||
1054 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1055 | } | |
1056 | ||
1057 | route = kvm_lookup_msi_route(s, msg); | |
1058 | if (!route) { | |
1059 | int virq; | |
1060 | ||
1061 | virq = kvm_irqchip_get_virq(s); | |
1062 | if (virq < 0) { | |
1063 | return virq; | |
1064 | } | |
1065 | ||
1066 | route = g_malloc(sizeof(KVMMSIRoute)); | |
1067 | route->kroute.gsi = virq; | |
1068 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1069 | route->kroute.flags = 0; | |
1070 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1071 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
1072 | route->kroute.u.msi.data = msg.data; | |
1073 | ||
1074 | kvm_add_routing_entry(s, &route->kroute); | |
1075 | ||
1076 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1077 | entry); | |
1078 | } | |
1079 | ||
1080 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1081 | ||
1082 | return kvm_irqchip_set_irq(s, route->kroute.gsi, 1); | |
1083 | } | |
1084 | ||
1085 | int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) | |
1086 | { | |
1087 | struct kvm_irq_routing_entry kroute; | |
1088 | int virq; | |
1089 | ||
1090 | if (!kvm_irqchip_in_kernel()) { | |
1091 | return -ENOSYS; | |
1092 | } | |
1093 | ||
1094 | virq = kvm_irqchip_get_virq(s); | |
1095 | if (virq < 0) { | |
1096 | return virq; | |
1097 | } | |
1098 | ||
1099 | kroute.gsi = virq; | |
1100 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1101 | kroute.flags = 0; | |
1102 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1103 | kroute.u.msi.address_hi = msg.address >> 32; | |
1104 | kroute.u.msi.data = msg.data; | |
1105 | ||
1106 | kvm_add_routing_entry(s, &kroute); | |
1107 | ||
1108 | return virq; | |
1109 | } | |
1110 | ||
1111 | #else /* !KVM_CAP_IRQ_ROUTING */ | |
1112 | ||
1113 | static void kvm_init_irq_routing(KVMState *s) | |
1114 | { | |
1115 | } | |
1116 | ||
1117 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1118 | { | |
1119 | abort(); | |
1120 | } | |
1121 | ||
1122 | int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) | |
1123 | { | |
1124 | abort(); | |
1125 | } | |
1126 | #endif /* !KVM_CAP_IRQ_ROUTING */ | |
1127 | ||
1128 | static int kvm_irqchip_create(KVMState *s) | |
1129 | { | |
1130 | QemuOptsList *list = qemu_find_opts("machine"); | |
1131 | int ret; | |
1132 | ||
1133 | if (QTAILQ_EMPTY(&list->head) || | |
1134 | !qemu_opt_get_bool(QTAILQ_FIRST(&list->head), | |
1135 | "kernel_irqchip", true) || | |
1136 | !kvm_check_extension(s, KVM_CAP_IRQCHIP)) { | |
1137 | return 0; | |
1138 | } | |
1139 | ||
1140 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1141 | if (ret < 0) { | |
1142 | fprintf(stderr, "Create kernel irqchip failed\n"); | |
1143 | return ret; | |
1144 | } | |
1145 | ||
1146 | s->irqchip_inject_ioctl = KVM_IRQ_LINE; | |
1147 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { | |
1148 | s->irqchip_inject_ioctl = KVM_IRQ_LINE_STATUS; | |
1149 | } | |
1150 | kvm_kernel_irqchip = true; | |
1151 | ||
1152 | kvm_init_irq_routing(s); | |
1153 | ||
1154 | return 0; | |
1155 | } | |
1156 | ||
1157 | int kvm_init(void) | |
1158 | { | |
1159 | static const char upgrade_note[] = | |
1160 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1161 | "(see http://sourceforge.net/projects/kvm).\n"; | |
1162 | KVMState *s; | |
1163 | const KVMCapabilityInfo *missing_cap; | |
1164 | int ret; | |
1165 | int i; | |
1166 | ||
1167 | s = g_malloc0(sizeof(KVMState)); | |
1168 | ||
1169 | /* | |
1170 | * On systems where the kernel can support different base page | |
1171 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
1172 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
1173 | * page size for the system though. | |
1174 | */ | |
1175 | assert(TARGET_PAGE_SIZE <= getpagesize()); | |
1176 | ||
1177 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
1178 | QTAILQ_INIT(&s->kvm_sw_breakpoints); | |
1179 | #endif | |
1180 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
1181 | s->slots[i].slot = i; | |
1182 | } | |
1183 | s->vmfd = -1; | |
1184 | s->fd = qemu_open("/dev/kvm", O_RDWR); | |
1185 | if (s->fd == -1) { | |
1186 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
1187 | ret = -errno; | |
1188 | goto err; | |
1189 | } | |
1190 | ||
1191 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
1192 | if (ret < KVM_API_VERSION) { | |
1193 | if (ret > 0) { | |
1194 | ret = -EINVAL; | |
1195 | } | |
1196 | fprintf(stderr, "kvm version too old\n"); | |
1197 | goto err; | |
1198 | } | |
1199 | ||
1200 | if (ret > KVM_API_VERSION) { | |
1201 | ret = -EINVAL; | |
1202 | fprintf(stderr, "kvm version not supported\n"); | |
1203 | goto err; | |
1204 | } | |
1205 | ||
1206 | s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0); | |
1207 | if (s->vmfd < 0) { | |
1208 | #ifdef TARGET_S390X | |
1209 | fprintf(stderr, "Please add the 'switch_amode' kernel parameter to " | |
1210 | "your host kernel command line\n"); | |
1211 | #endif | |
1212 | ret = s->vmfd; | |
1213 | goto err; | |
1214 | } | |
1215 | ||
1216 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); | |
1217 | if (!missing_cap) { | |
1218 | missing_cap = | |
1219 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
1220 | } | |
1221 | if (missing_cap) { | |
1222 | ret = -EINVAL; | |
1223 | fprintf(stderr, "kvm does not support %s\n%s", | |
1224 | missing_cap->name, upgrade_note); | |
1225 | goto err; | |
1226 | } | |
1227 | ||
1228 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); | |
1229 | ||
1230 | s->broken_set_mem_region = 1; | |
1231 | ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); | |
1232 | if (ret > 0) { | |
1233 | s->broken_set_mem_region = 0; | |
1234 | } | |
1235 | ||
1236 | #ifdef KVM_CAP_VCPU_EVENTS | |
1237 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
1238 | #endif | |
1239 | ||
1240 | s->robust_singlestep = | |
1241 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
1242 | ||
1243 | #ifdef KVM_CAP_DEBUGREGS | |
1244 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
1245 | #endif | |
1246 | ||
1247 | #ifdef KVM_CAP_XSAVE | |
1248 | s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE); | |
1249 | #endif | |
1250 | ||
1251 | #ifdef KVM_CAP_XCRS | |
1252 | s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS); | |
1253 | #endif | |
1254 | ||
1255 | #ifdef KVM_CAP_PIT_STATE2 | |
1256 | s->pit_state2 = kvm_check_extension(s, KVM_CAP_PIT_STATE2); | |
1257 | #endif | |
1258 | ||
1259 | s->direct_msi = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); | |
1260 | ||
1261 | ret = kvm_arch_init(s); | |
1262 | if (ret < 0) { | |
1263 | goto err; | |
1264 | } | |
1265 | ||
1266 | ret = kvm_irqchip_create(s); | |
1267 | if (ret < 0) { | |
1268 | goto err; | |
1269 | } | |
1270 | ||
1271 | kvm_state = s; | |
1272 | memory_listener_register(&kvm_memory_listener, NULL); | |
1273 | ||
1274 | s->many_ioeventfds = kvm_check_many_ioeventfds(); | |
1275 | ||
1276 | cpu_interrupt_handler = kvm_handle_interrupt; | |
1277 | ||
1278 | return 0; | |
1279 | ||
1280 | err: | |
1281 | if (s) { | |
1282 | if (s->vmfd >= 0) { | |
1283 | close(s->vmfd); | |
1284 | } | |
1285 | if (s->fd != -1) { | |
1286 | close(s->fd); | |
1287 | } | |
1288 | } | |
1289 | g_free(s); | |
1290 | ||
1291 | return ret; | |
1292 | } | |
1293 | ||
1294 | static void kvm_handle_io(uint16_t port, void *data, int direction, int size, | |
1295 | uint32_t count) | |
1296 | { | |
1297 | int i; | |
1298 | uint8_t *ptr = data; | |
1299 | ||
1300 | for (i = 0; i < count; i++) { | |
1301 | if (direction == KVM_EXIT_IO_IN) { | |
1302 | switch (size) { | |
1303 | case 1: | |
1304 | stb_p(ptr, cpu_inb(port)); | |
1305 | break; | |
1306 | case 2: | |
1307 | stw_p(ptr, cpu_inw(port)); | |
1308 | break; | |
1309 | case 4: | |
1310 | stl_p(ptr, cpu_inl(port)); | |
1311 | break; | |
1312 | } | |
1313 | } else { | |
1314 | switch (size) { | |
1315 | case 1: | |
1316 | cpu_outb(port, ldub_p(ptr)); | |
1317 | break; | |
1318 | case 2: | |
1319 | cpu_outw(port, lduw_p(ptr)); | |
1320 | break; | |
1321 | case 4: | |
1322 | cpu_outl(port, ldl_p(ptr)); | |
1323 | break; | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | ptr += size; | |
1328 | } | |
1329 | } | |
1330 | ||
1331 | static int kvm_handle_internal_error(CPUArchState *env, struct kvm_run *run) | |
1332 | { | |
1333 | fprintf(stderr, "KVM internal error."); | |
1334 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { | |
1335 | int i; | |
1336 | ||
1337 | fprintf(stderr, " Suberror: %d\n", run->internal.suberror); | |
1338 | for (i = 0; i < run->internal.ndata; ++i) { | |
1339 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
1340 | i, (uint64_t)run->internal.data[i]); | |
1341 | } | |
1342 | } else { | |
1343 | fprintf(stderr, "\n"); | |
1344 | } | |
1345 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { | |
1346 | fprintf(stderr, "emulation failure\n"); | |
1347 | if (!kvm_arch_stop_on_emulation_error(env)) { | |
1348 | cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); | |
1349 | return EXCP_INTERRUPT; | |
1350 | } | |
1351 | } | |
1352 | /* FIXME: Should trigger a qmp message to let management know | |
1353 | * something went wrong. | |
1354 | */ | |
1355 | return -1; | |
1356 | } | |
1357 | ||
1358 | void kvm_flush_coalesced_mmio_buffer(void) | |
1359 | { | |
1360 | KVMState *s = kvm_state; | |
1361 | ||
1362 | if (s->coalesced_flush_in_progress) { | |
1363 | return; | |
1364 | } | |
1365 | ||
1366 | s->coalesced_flush_in_progress = true; | |
1367 | ||
1368 | if (s->coalesced_mmio_ring) { | |
1369 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
1370 | while (ring->first != ring->last) { | |
1371 | struct kvm_coalesced_mmio *ent; | |
1372 | ||
1373 | ent = &ring->coalesced_mmio[ring->first]; | |
1374 | ||
1375 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
1376 | smp_wmb(); | |
1377 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; | |
1378 | } | |
1379 | } | |
1380 | ||
1381 | s->coalesced_flush_in_progress = false; | |
1382 | } | |
1383 | ||
1384 | static void do_kvm_cpu_synchronize_state(void *_env) | |
1385 | { | |
1386 | CPUArchState *env = _env; | |
1387 | ||
1388 | if (!env->kvm_vcpu_dirty) { | |
1389 | kvm_arch_get_registers(env); | |
1390 | env->kvm_vcpu_dirty = 1; | |
1391 | } | |
1392 | } | |
1393 | ||
1394 | void kvm_cpu_synchronize_state(CPUArchState *env) | |
1395 | { | |
1396 | if (!env->kvm_vcpu_dirty) { | |
1397 | run_on_cpu(env, do_kvm_cpu_synchronize_state, env); | |
1398 | } | |
1399 | } | |
1400 | ||
1401 | void kvm_cpu_synchronize_post_reset(CPUArchState *env) | |
1402 | { | |
1403 | kvm_arch_put_registers(env, KVM_PUT_RESET_STATE); | |
1404 | env->kvm_vcpu_dirty = 0; | |
1405 | } | |
1406 | ||
1407 | void kvm_cpu_synchronize_post_init(CPUArchState *env) | |
1408 | { | |
1409 | kvm_arch_put_registers(env, KVM_PUT_FULL_STATE); | |
1410 | env->kvm_vcpu_dirty = 0; | |
1411 | } | |
1412 | ||
1413 | int kvm_cpu_exec(CPUArchState *env) | |
1414 | { | |
1415 | struct kvm_run *run = env->kvm_run; | |
1416 | int ret, run_ret; | |
1417 | ||
1418 | DPRINTF("kvm_cpu_exec()\n"); | |
1419 | ||
1420 | if (kvm_arch_process_async_events(env)) { | |
1421 | env->exit_request = 0; | |
1422 | return EXCP_HLT; | |
1423 | } | |
1424 | ||
1425 | do { | |
1426 | if (env->kvm_vcpu_dirty) { | |
1427 | kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE); | |
1428 | env->kvm_vcpu_dirty = 0; | |
1429 | } | |
1430 | ||
1431 | kvm_arch_pre_run(env, run); | |
1432 | if (env->exit_request) { | |
1433 | DPRINTF("interrupt exit requested\n"); | |
1434 | /* | |
1435 | * KVM requires us to reenter the kernel after IO exits to complete | |
1436 | * instruction emulation. This self-signal will ensure that we | |
1437 | * leave ASAP again. | |
1438 | */ | |
1439 | qemu_cpu_kick_self(); | |
1440 | } | |
1441 | qemu_mutex_unlock_iothread(); | |
1442 | ||
1443 | run_ret = kvm_vcpu_ioctl(env, KVM_RUN, 0); | |
1444 | ||
1445 | qemu_mutex_lock_iothread(); | |
1446 | kvm_arch_post_run(env, run); | |
1447 | ||
1448 | kvm_flush_coalesced_mmio_buffer(); | |
1449 | ||
1450 | if (run_ret < 0) { | |
1451 | if (run_ret == -EINTR || run_ret == -EAGAIN) { | |
1452 | DPRINTF("io window exit\n"); | |
1453 | ret = EXCP_INTERRUPT; | |
1454 | break; | |
1455 | } | |
1456 | fprintf(stderr, "error: kvm run failed %s\n", | |
1457 | strerror(-run_ret)); | |
1458 | abort(); | |
1459 | } | |
1460 | ||
1461 | switch (run->exit_reason) { | |
1462 | case KVM_EXIT_IO: | |
1463 | DPRINTF("handle_io\n"); | |
1464 | kvm_handle_io(run->io.port, | |
1465 | (uint8_t *)run + run->io.data_offset, | |
1466 | run->io.direction, | |
1467 | run->io.size, | |
1468 | run->io.count); | |
1469 | ret = 0; | |
1470 | break; | |
1471 | case KVM_EXIT_MMIO: | |
1472 | DPRINTF("handle_mmio\n"); | |
1473 | cpu_physical_memory_rw(run->mmio.phys_addr, | |
1474 | run->mmio.data, | |
1475 | run->mmio.len, | |
1476 | run->mmio.is_write); | |
1477 | ret = 0; | |
1478 | break; | |
1479 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
1480 | DPRINTF("irq_window_open\n"); | |
1481 | ret = EXCP_INTERRUPT; | |
1482 | break; | |
1483 | case KVM_EXIT_SHUTDOWN: | |
1484 | DPRINTF("shutdown\n"); | |
1485 | qemu_system_reset_request(); | |
1486 | ret = EXCP_INTERRUPT; | |
1487 | break; | |
1488 | case KVM_EXIT_UNKNOWN: | |
1489 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", | |
1490 | (uint64_t)run->hw.hardware_exit_reason); | |
1491 | ret = -1; | |
1492 | break; | |
1493 | case KVM_EXIT_INTERNAL_ERROR: | |
1494 | ret = kvm_handle_internal_error(env, run); | |
1495 | break; | |
1496 | default: | |
1497 | DPRINTF("kvm_arch_handle_exit\n"); | |
1498 | ret = kvm_arch_handle_exit(env, run); | |
1499 | break; | |
1500 | } | |
1501 | } while (ret == 0); | |
1502 | ||
1503 | if (ret < 0) { | |
1504 | cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); | |
1505 | vm_stop(RUN_STATE_INTERNAL_ERROR); | |
1506 | } | |
1507 | ||
1508 | env->exit_request = 0; | |
1509 | return ret; | |
1510 | } | |
1511 | ||
1512 | int kvm_ioctl(KVMState *s, int type, ...) | |
1513 | { | |
1514 | int ret; | |
1515 | void *arg; | |
1516 | va_list ap; | |
1517 | ||
1518 | va_start(ap, type); | |
1519 | arg = va_arg(ap, void *); | |
1520 | va_end(ap); | |
1521 | ||
1522 | ret = ioctl(s->fd, type, arg); | |
1523 | if (ret == -1) { | |
1524 | ret = -errno; | |
1525 | } | |
1526 | return ret; | |
1527 | } | |
1528 | ||
1529 | int kvm_vm_ioctl(KVMState *s, int type, ...) | |
1530 | { | |
1531 | int ret; | |
1532 | void *arg; | |
1533 | va_list ap; | |
1534 | ||
1535 | va_start(ap, type); | |
1536 | arg = va_arg(ap, void *); | |
1537 | va_end(ap); | |
1538 | ||
1539 | ret = ioctl(s->vmfd, type, arg); | |
1540 | if (ret == -1) { | |
1541 | ret = -errno; | |
1542 | } | |
1543 | return ret; | |
1544 | } | |
1545 | ||
1546 | int kvm_vcpu_ioctl(CPUArchState *env, int type, ...) | |
1547 | { | |
1548 | int ret; | |
1549 | void *arg; | |
1550 | va_list ap; | |
1551 | ||
1552 | va_start(ap, type); | |
1553 | arg = va_arg(ap, void *); | |
1554 | va_end(ap); | |
1555 | ||
1556 | ret = ioctl(env->kvm_fd, type, arg); | |
1557 | if (ret == -1) { | |
1558 | ret = -errno; | |
1559 | } | |
1560 | return ret; | |
1561 | } | |
1562 | ||
1563 | int kvm_has_sync_mmu(void) | |
1564 | { | |
1565 | return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); | |
1566 | } | |
1567 | ||
1568 | int kvm_has_vcpu_events(void) | |
1569 | { | |
1570 | return kvm_state->vcpu_events; | |
1571 | } | |
1572 | ||
1573 | int kvm_has_robust_singlestep(void) | |
1574 | { | |
1575 | return kvm_state->robust_singlestep; | |
1576 | } | |
1577 | ||
1578 | int kvm_has_debugregs(void) | |
1579 | { | |
1580 | return kvm_state->debugregs; | |
1581 | } | |
1582 | ||
1583 | int kvm_has_xsave(void) | |
1584 | { | |
1585 | return kvm_state->xsave; | |
1586 | } | |
1587 | ||
1588 | int kvm_has_xcrs(void) | |
1589 | { | |
1590 | return kvm_state->xcrs; | |
1591 | } | |
1592 | ||
1593 | int kvm_has_pit_state2(void) | |
1594 | { | |
1595 | return kvm_state->pit_state2; | |
1596 | } | |
1597 | ||
1598 | int kvm_has_many_ioeventfds(void) | |
1599 | { | |
1600 | if (!kvm_enabled()) { | |
1601 | return 0; | |
1602 | } | |
1603 | return kvm_state->many_ioeventfds; | |
1604 | } | |
1605 | ||
1606 | int kvm_has_gsi_routing(void) | |
1607 | { | |
1608 | #ifdef KVM_CAP_IRQ_ROUTING | |
1609 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); | |
1610 | #else | |
1611 | return false; | |
1612 | #endif | |
1613 | } | |
1614 | ||
1615 | int kvm_allows_irq0_override(void) | |
1616 | { | |
1617 | return !kvm_irqchip_in_kernel() || kvm_has_gsi_routing(); | |
1618 | } | |
1619 | ||
1620 | void kvm_setup_guest_memory(void *start, size_t size) | |
1621 | { | |
1622 | if (!kvm_has_sync_mmu()) { | |
1623 | int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK); | |
1624 | ||
1625 | if (ret) { | |
1626 | perror("qemu_madvise"); | |
1627 | fprintf(stderr, | |
1628 | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n"); | |
1629 | exit(1); | |
1630 | } | |
1631 | } | |
1632 | } | |
1633 | ||
1634 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
1635 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUArchState *env, | |
1636 | target_ulong pc) | |
1637 | { | |
1638 | struct kvm_sw_breakpoint *bp; | |
1639 | ||
1640 | QTAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { | |
1641 | if (bp->pc == pc) { | |
1642 | return bp; | |
1643 | } | |
1644 | } | |
1645 | return NULL; | |
1646 | } | |
1647 | ||
1648 | int kvm_sw_breakpoints_active(CPUArchState *env) | |
1649 | { | |
1650 | return !QTAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints); | |
1651 | } | |
1652 | ||
1653 | struct kvm_set_guest_debug_data { | |
1654 | struct kvm_guest_debug dbg; | |
1655 | CPUArchState *env; | |
1656 | int err; | |
1657 | }; | |
1658 | ||
1659 | static void kvm_invoke_set_guest_debug(void *data) | |
1660 | { | |
1661 | struct kvm_set_guest_debug_data *dbg_data = data; | |
1662 | CPUArchState *env = dbg_data->env; | |
1663 | ||
1664 | dbg_data->err = kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg); | |
1665 | } | |
1666 | ||
1667 | int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap) | |
1668 | { | |
1669 | struct kvm_set_guest_debug_data data; | |
1670 | ||
1671 | data.dbg.control = reinject_trap; | |
1672 | ||
1673 | if (env->singlestep_enabled) { | |
1674 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; | |
1675 | } | |
1676 | kvm_arch_update_guest_debug(env, &data.dbg); | |
1677 | data.env = env; | |
1678 | ||
1679 | run_on_cpu(env, kvm_invoke_set_guest_debug, &data); | |
1680 | return data.err; | |
1681 | } | |
1682 | ||
1683 | int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr, | |
1684 | target_ulong len, int type) | |
1685 | { | |
1686 | struct kvm_sw_breakpoint *bp; | |
1687 | CPUArchState *env; | |
1688 | int err; | |
1689 | ||
1690 | if (type == GDB_BREAKPOINT_SW) { | |
1691 | bp = kvm_find_sw_breakpoint(current_env, addr); | |
1692 | if (bp) { | |
1693 | bp->use_count++; | |
1694 | return 0; | |
1695 | } | |
1696 | ||
1697 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); | |
1698 | if (!bp) { | |
1699 | return -ENOMEM; | |
1700 | } | |
1701 | ||
1702 | bp->pc = addr; | |
1703 | bp->use_count = 1; | |
1704 | err = kvm_arch_insert_sw_breakpoint(current_env, bp); | |
1705 | if (err) { | |
1706 | g_free(bp); | |
1707 | return err; | |
1708 | } | |
1709 | ||
1710 | QTAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, | |
1711 | bp, entry); | |
1712 | } else { | |
1713 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
1714 | if (err) { | |
1715 | return err; | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1720 | err = kvm_update_guest_debug(env, 0); | |
1721 | if (err) { | |
1722 | return err; | |
1723 | } | |
1724 | } | |
1725 | return 0; | |
1726 | } | |
1727 | ||
1728 | int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr, | |
1729 | target_ulong len, int type) | |
1730 | { | |
1731 | struct kvm_sw_breakpoint *bp; | |
1732 | CPUArchState *env; | |
1733 | int err; | |
1734 | ||
1735 | if (type == GDB_BREAKPOINT_SW) { | |
1736 | bp = kvm_find_sw_breakpoint(current_env, addr); | |
1737 | if (!bp) { | |
1738 | return -ENOENT; | |
1739 | } | |
1740 | ||
1741 | if (bp->use_count > 1) { | |
1742 | bp->use_count--; | |
1743 | return 0; | |
1744 | } | |
1745 | ||
1746 | err = kvm_arch_remove_sw_breakpoint(current_env, bp); | |
1747 | if (err) { | |
1748 | return err; | |
1749 | } | |
1750 | ||
1751 | QTAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); | |
1752 | g_free(bp); | |
1753 | } else { | |
1754 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
1755 | if (err) { | |
1756 | return err; | |
1757 | } | |
1758 | } | |
1759 | ||
1760 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1761 | err = kvm_update_guest_debug(env, 0); | |
1762 | if (err) { | |
1763 | return err; | |
1764 | } | |
1765 | } | |
1766 | return 0; | |
1767 | } | |
1768 | ||
1769 | void kvm_remove_all_breakpoints(CPUArchState *current_env) | |
1770 | { | |
1771 | struct kvm_sw_breakpoint *bp, *next; | |
1772 | KVMState *s = current_env->kvm_state; | |
1773 | CPUArchState *env; | |
1774 | ||
1775 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { | |
1776 | if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { | |
1777 | /* Try harder to find a CPU that currently sees the breakpoint. */ | |
1778 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1779 | if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) { | |
1780 | break; | |
1781 | } | |
1782 | } | |
1783 | } | |
1784 | } | |
1785 | kvm_arch_remove_all_hw_breakpoints(); | |
1786 | ||
1787 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1788 | kvm_update_guest_debug(env, 0); | |
1789 | } | |
1790 | } | |
1791 | ||
1792 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
1793 | ||
1794 | int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap) | |
1795 | { | |
1796 | return -EINVAL; | |
1797 | } | |
1798 | ||
1799 | int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr, | |
1800 | target_ulong len, int type) | |
1801 | { | |
1802 | return -EINVAL; | |
1803 | } | |
1804 | ||
1805 | int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr, | |
1806 | target_ulong len, int type) | |
1807 | { | |
1808 | return -EINVAL; | |
1809 | } | |
1810 | ||
1811 | void kvm_remove_all_breakpoints(CPUArchState *current_env) | |
1812 | { | |
1813 | } | |
1814 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
1815 | ||
1816 | int kvm_set_signal_mask(CPUArchState *env, const sigset_t *sigset) | |
1817 | { | |
1818 | struct kvm_signal_mask *sigmask; | |
1819 | int r; | |
1820 | ||
1821 | if (!sigset) { | |
1822 | return kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, NULL); | |
1823 | } | |
1824 | ||
1825 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); | |
1826 | ||
1827 | sigmask->len = 8; | |
1828 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); | |
1829 | r = kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, sigmask); | |
1830 | g_free(sigmask); | |
1831 | ||
1832 | return r; | |
1833 | } | |
1834 | ||
1835 | int kvm_set_ioeventfd_mmio(int fd, uint32_t addr, uint32_t val, bool assign, | |
1836 | uint32_t size) | |
1837 | { | |
1838 | int ret; | |
1839 | struct kvm_ioeventfd iofd; | |
1840 | ||
1841 | iofd.datamatch = val; | |
1842 | iofd.addr = addr; | |
1843 | iofd.len = size; | |
1844 | iofd.flags = KVM_IOEVENTFD_FLAG_DATAMATCH; | |
1845 | iofd.fd = fd; | |
1846 | ||
1847 | if (!kvm_enabled()) { | |
1848 | return -ENOSYS; | |
1849 | } | |
1850 | ||
1851 | if (!assign) { | |
1852 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
1853 | } | |
1854 | ||
1855 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
1856 | ||
1857 | if (ret < 0) { | |
1858 | return -errno; | |
1859 | } | |
1860 | ||
1861 | return 0; | |
1862 | } | |
1863 | ||
1864 | int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign) | |
1865 | { | |
1866 | struct kvm_ioeventfd kick = { | |
1867 | .datamatch = val, | |
1868 | .addr = addr, | |
1869 | .len = 2, | |
1870 | .flags = KVM_IOEVENTFD_FLAG_DATAMATCH | KVM_IOEVENTFD_FLAG_PIO, | |
1871 | .fd = fd, | |
1872 | }; | |
1873 | int r; | |
1874 | if (!kvm_enabled()) { | |
1875 | return -ENOSYS; | |
1876 | } | |
1877 | if (!assign) { | |
1878 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
1879 | } | |
1880 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
1881 | if (r < 0) { | |
1882 | return r; | |
1883 | } | |
1884 | return 0; | |
1885 | } | |
1886 | ||
1887 | int kvm_on_sigbus_vcpu(CPUArchState *env, int code, void *addr) | |
1888 | { | |
1889 | return kvm_arch_on_sigbus_vcpu(env, code, addr); | |
1890 | } | |
1891 | ||
1892 | int kvm_on_sigbus(int code, void *addr) | |
1893 | { | |
1894 | return kvm_arch_on_sigbus(code, addr); | |
1895 | } |