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05330448 AL |
1 | /* |
2 | * QEMU KVM support | |
3 | * | |
4 | * Copyright IBM, Corp. 2008 | |
5832d1f2 | 5 | * Red Hat, Inc. 2008 |
05330448 AL |
6 | * |
7 | * Authors: | |
8 | * Anthony Liguori <aliguori@us.ibm.com> | |
5832d1f2 | 9 | * Glauber Costa <gcosta@redhat.com> |
05330448 AL |
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> | |
984b5181 | 19 | #include <stdarg.h> |
05330448 AL |
20 | |
21 | #include <linux/kvm.h> | |
22 | ||
23 | #include "qemu-common.h" | |
24 | #include "sysemu.h" | |
e22a25c9 | 25 | #include "gdbstub.h" |
05330448 AL |
26 | #include "kvm.h" |
27 | ||
f65ed4c1 AL |
28 | /* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */ |
29 | #define PAGE_SIZE TARGET_PAGE_SIZE | |
30 | ||
05330448 AL |
31 | //#define DEBUG_KVM |
32 | ||
33 | #ifdef DEBUG_KVM | |
34 | #define dprintf(fmt, ...) \ | |
35 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
36 | #else | |
37 | #define dprintf(fmt, ...) \ | |
38 | do { } while (0) | |
39 | #endif | |
40 | ||
34fc643f AL |
41 | typedef struct KVMSlot |
42 | { | |
43 | target_phys_addr_t start_addr; | |
44 | ram_addr_t memory_size; | |
45 | ram_addr_t phys_offset; | |
46 | int slot; | |
47 | int flags; | |
48 | } KVMSlot; | |
05330448 | 49 | |
5832d1f2 AL |
50 | typedef struct kvm_dirty_log KVMDirtyLog; |
51 | ||
05330448 AL |
52 | int kvm_allowed = 0; |
53 | ||
54 | struct KVMState | |
55 | { | |
56 | KVMSlot slots[32]; | |
57 | int fd; | |
58 | int vmfd; | |
f65ed4c1 | 59 | int coalesced_mmio; |
e22a25c9 AL |
60 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
61 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; | |
62 | #endif | |
05330448 AL |
63 | }; |
64 | ||
65 | static KVMState *kvm_state; | |
66 | ||
67 | static KVMSlot *kvm_alloc_slot(KVMState *s) | |
68 | { | |
69 | int i; | |
70 | ||
71 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
62d60e8c AL |
72 | /* KVM private memory slots */ |
73 | if (i >= 8 && i < 12) | |
74 | continue; | |
05330448 AL |
75 | if (s->slots[i].memory_size == 0) |
76 | return &s->slots[i]; | |
77 | } | |
78 | ||
d3f8d37f AL |
79 | fprintf(stderr, "%s: no free slot available\n", __func__); |
80 | abort(); | |
81 | } | |
82 | ||
83 | static KVMSlot *kvm_lookup_matching_slot(KVMState *s, | |
84 | target_phys_addr_t start_addr, | |
85 | target_phys_addr_t end_addr) | |
86 | { | |
87 | int i; | |
88 | ||
89 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
90 | KVMSlot *mem = &s->slots[i]; | |
91 | ||
92 | if (start_addr == mem->start_addr && | |
93 | end_addr == mem->start_addr + mem->memory_size) { | |
94 | return mem; | |
95 | } | |
96 | } | |
97 | ||
05330448 AL |
98 | return NULL; |
99 | } | |
100 | ||
101 | static KVMSlot *kvm_lookup_slot(KVMState *s, target_phys_addr_t start_addr) | |
102 | { | |
103 | int i; | |
104 | ||
105 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
106 | KVMSlot *mem = &s->slots[i]; | |
107 | ||
34fc643f AL |
108 | if (start_addr >= mem->start_addr && |
109 | start_addr < (mem->start_addr + mem->memory_size)) | |
05330448 AL |
110 | return mem; |
111 | } | |
112 | ||
113 | return NULL; | |
114 | } | |
115 | ||
5832d1f2 AL |
116 | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
117 | { | |
118 | struct kvm_userspace_memory_region mem; | |
119 | ||
120 | mem.slot = slot->slot; | |
121 | mem.guest_phys_addr = slot->start_addr; | |
122 | mem.memory_size = slot->memory_size; | |
5579c7f3 | 123 | mem.userspace_addr = (unsigned long)qemu_get_ram_ptr(slot->phys_offset); |
5832d1f2 AL |
124 | mem.flags = slot->flags; |
125 | ||
126 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
127 | } | |
128 | ||
129 | ||
05330448 AL |
130 | int kvm_init_vcpu(CPUState *env) |
131 | { | |
132 | KVMState *s = kvm_state; | |
133 | long mmap_size; | |
134 | int ret; | |
135 | ||
136 | dprintf("kvm_init_vcpu\n"); | |
137 | ||
984b5181 | 138 | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
05330448 AL |
139 | if (ret < 0) { |
140 | dprintf("kvm_create_vcpu failed\n"); | |
141 | goto err; | |
142 | } | |
143 | ||
144 | env->kvm_fd = ret; | |
145 | env->kvm_state = s; | |
146 | ||
147 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
148 | if (mmap_size < 0) { | |
149 | dprintf("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
150 | goto err; | |
151 | } | |
152 | ||
153 | env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
154 | env->kvm_fd, 0); | |
155 | if (env->kvm_run == MAP_FAILED) { | |
156 | ret = -errno; | |
157 | dprintf("mmap'ing vcpu state failed\n"); | |
158 | goto err; | |
159 | } | |
160 | ||
161 | ret = kvm_arch_init_vcpu(env); | |
162 | ||
163 | err: | |
164 | return ret; | |
165 | } | |
166 | ||
f5d6f51b AL |
167 | int kvm_sync_vcpus(void) |
168 | { | |
169 | CPUState *env; | |
170 | ||
171 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
172 | int ret; | |
173 | ||
174 | ret = kvm_arch_put_registers(env); | |
175 | if (ret) | |
176 | return ret; | |
177 | } | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
5832d1f2 AL |
182 | /* |
183 | * dirty pages logging control | |
184 | */ | |
d3f8d37f AL |
185 | static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, |
186 | ram_addr_t size, unsigned flags, | |
5832d1f2 AL |
187 | unsigned mask) |
188 | { | |
189 | KVMState *s = kvm_state; | |
d3f8d37f | 190 | KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); |
5832d1f2 | 191 | if (mem == NULL) { |
d3f8d37f AL |
192 | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" |
193 | TARGET_FMT_plx "\n", __func__, phys_addr, | |
194 | phys_addr + size - 1); | |
5832d1f2 AL |
195 | return -EINVAL; |
196 | } | |
197 | ||
198 | flags = (mem->flags & ~mask) | flags; | |
199 | /* Nothing changed, no need to issue ioctl */ | |
200 | if (flags == mem->flags) | |
201 | return 0; | |
202 | ||
203 | mem->flags = flags; | |
204 | ||
205 | return kvm_set_user_memory_region(s, mem); | |
206 | } | |
207 | ||
d3f8d37f | 208 | int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size) |
5832d1f2 | 209 | { |
d3f8d37f | 210 | return kvm_dirty_pages_log_change(phys_addr, size, |
5832d1f2 AL |
211 | KVM_MEM_LOG_DIRTY_PAGES, |
212 | KVM_MEM_LOG_DIRTY_PAGES); | |
213 | } | |
214 | ||
d3f8d37f | 215 | int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size) |
5832d1f2 | 216 | { |
d3f8d37f | 217 | return kvm_dirty_pages_log_change(phys_addr, size, |
5832d1f2 AL |
218 | 0, |
219 | KVM_MEM_LOG_DIRTY_PAGES); | |
220 | } | |
221 | ||
222 | /** | |
223 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
224 | * This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty(). | |
225 | * This means all bits are set to dirty. | |
226 | * | |
d3f8d37f | 227 | * @start_add: start of logged region. |
5832d1f2 AL |
228 | * @end_addr: end of logged region. |
229 | */ | |
d3f8d37f AL |
230 | void kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, |
231 | target_phys_addr_t end_addr) | |
5832d1f2 AL |
232 | { |
233 | KVMState *s = kvm_state; | |
234 | KVMDirtyLog d; | |
d3f8d37f | 235 | KVMSlot *mem = kvm_lookup_matching_slot(s, start_addr, end_addr); |
5832d1f2 AL |
236 | unsigned long alloc_size; |
237 | ram_addr_t addr; | |
238 | target_phys_addr_t phys_addr = start_addr; | |
239 | ||
d3f8d37f AL |
240 | dprintf("sync addr: " TARGET_FMT_lx " into %lx\n", start_addr, |
241 | mem->phys_offset); | |
5832d1f2 | 242 | if (mem == NULL) { |
d3f8d37f AL |
243 | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" |
244 | TARGET_FMT_plx "\n", __func__, phys_addr, end_addr - 1); | |
5832d1f2 AL |
245 | return; |
246 | } | |
247 | ||
248 | alloc_size = mem->memory_size >> TARGET_PAGE_BITS / sizeof(d.dirty_bitmap); | |
249 | d.dirty_bitmap = qemu_mallocz(alloc_size); | |
250 | ||
5832d1f2 AL |
251 | d.slot = mem->slot; |
252 | dprintf("slot %d, phys_addr %llx, uaddr: %llx\n", | |
253 | d.slot, mem->start_addr, mem->phys_offset); | |
254 | ||
255 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { | |
256 | dprintf("ioctl failed %d\n", errno); | |
257 | goto out; | |
258 | } | |
259 | ||
260 | phys_addr = start_addr; | |
261 | for (addr = mem->phys_offset; phys_addr < end_addr; phys_addr+= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { | |
262 | unsigned long *bitmap = (unsigned long *)d.dirty_bitmap; | |
263 | unsigned nr = (phys_addr - start_addr) >> TARGET_PAGE_BITS; | |
264 | unsigned word = nr / (sizeof(*bitmap) * 8); | |
265 | unsigned bit = nr % (sizeof(*bitmap) * 8); | |
266 | if ((bitmap[word] >> bit) & 1) | |
267 | cpu_physical_memory_set_dirty(addr); | |
268 | } | |
269 | out: | |
270 | qemu_free(d.dirty_bitmap); | |
271 | } | |
272 | ||
f65ed4c1 AL |
273 | int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) |
274 | { | |
275 | int ret = -ENOSYS; | |
276 | #ifdef KVM_CAP_COALESCED_MMIO | |
277 | KVMState *s = kvm_state; | |
278 | ||
279 | if (s->coalesced_mmio) { | |
280 | struct kvm_coalesced_mmio_zone zone; | |
281 | ||
282 | zone.addr = start; | |
283 | zone.size = size; | |
284 | ||
285 | ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
286 | } | |
287 | #endif | |
288 | ||
289 | return ret; | |
290 | } | |
291 | ||
292 | int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) | |
293 | { | |
294 | int ret = -ENOSYS; | |
295 | #ifdef KVM_CAP_COALESCED_MMIO | |
296 | KVMState *s = kvm_state; | |
297 | ||
298 | if (s->coalesced_mmio) { | |
299 | struct kvm_coalesced_mmio_zone zone; | |
300 | ||
301 | zone.addr = start; | |
302 | zone.size = size; | |
303 | ||
304 | ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
305 | } | |
306 | #endif | |
307 | ||
308 | return ret; | |
309 | } | |
310 | ||
05330448 AL |
311 | int kvm_init(int smp_cpus) |
312 | { | |
313 | KVMState *s; | |
314 | int ret; | |
315 | int i; | |
316 | ||
317 | if (smp_cpus > 1) | |
318 | return -EINVAL; | |
319 | ||
320 | s = qemu_mallocz(sizeof(KVMState)); | |
05330448 | 321 | |
e22a25c9 AL |
322 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
323 | TAILQ_INIT(&s->kvm_sw_breakpoints); | |
324 | #endif | |
05330448 AL |
325 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) |
326 | s->slots[i].slot = i; | |
327 | ||
328 | s->vmfd = -1; | |
329 | s->fd = open("/dev/kvm", O_RDWR); | |
330 | if (s->fd == -1) { | |
331 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
332 | ret = -errno; | |
333 | goto err; | |
334 | } | |
335 | ||
336 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
337 | if (ret < KVM_API_VERSION) { | |
338 | if (ret > 0) | |
339 | ret = -EINVAL; | |
340 | fprintf(stderr, "kvm version too old\n"); | |
341 | goto err; | |
342 | } | |
343 | ||
344 | if (ret > KVM_API_VERSION) { | |
345 | ret = -EINVAL; | |
346 | fprintf(stderr, "kvm version not supported\n"); | |
347 | goto err; | |
348 | } | |
349 | ||
350 | s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0); | |
351 | if (s->vmfd < 0) | |
352 | goto err; | |
353 | ||
354 | /* initially, KVM allocated its own memory and we had to jump through | |
355 | * hooks to make phys_ram_base point to this. Modern versions of KVM | |
5579c7f3 | 356 | * just use a user allocated buffer so we can use regular pages |
05330448 AL |
357 | * unmodified. Make sure we have a sufficiently modern version of KVM. |
358 | */ | |
984b5181 | 359 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_USER_MEMORY); |
05330448 AL |
360 | if (ret <= 0) { |
361 | if (ret == 0) | |
362 | ret = -EINVAL; | |
363 | fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n"); | |
364 | goto err; | |
365 | } | |
366 | ||
d85dc283 AL |
367 | /* There was a nasty bug in < kvm-80 that prevents memory slots from being |
368 | * destroyed properly. Since we rely on this capability, refuse to work | |
369 | * with any kernel without this capability. */ | |
370 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, | |
371 | KVM_CAP_DESTROY_MEMORY_REGION_WORKS); | |
372 | if (ret <= 0) { | |
373 | if (ret == 0) | |
374 | ret = -EINVAL; | |
375 | ||
376 | fprintf(stderr, | |
377 | "KVM kernel module broken (DESTROY_MEMORY_REGION)\n" | |
378 | "Please upgrade to at least kvm-81.\n"); | |
379 | goto err; | |
380 | } | |
381 | ||
f65ed4c1 AL |
382 | s->coalesced_mmio = 0; |
383 | #ifdef KVM_CAP_COALESCED_MMIO | |
384 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_COALESCED_MMIO); | |
385 | if (ret > 0) | |
386 | s->coalesced_mmio = ret; | |
387 | #endif | |
388 | ||
05330448 AL |
389 | ret = kvm_arch_init(s, smp_cpus); |
390 | if (ret < 0) | |
391 | goto err; | |
392 | ||
393 | kvm_state = s; | |
394 | ||
395 | return 0; | |
396 | ||
397 | err: | |
398 | if (s) { | |
399 | if (s->vmfd != -1) | |
400 | close(s->vmfd); | |
401 | if (s->fd != -1) | |
402 | close(s->fd); | |
403 | } | |
404 | qemu_free(s); | |
405 | ||
406 | return ret; | |
407 | } | |
408 | ||
409 | static int kvm_handle_io(CPUState *env, uint16_t port, void *data, | |
410 | int direction, int size, uint32_t count) | |
411 | { | |
412 | int i; | |
413 | uint8_t *ptr = data; | |
414 | ||
415 | for (i = 0; i < count; i++) { | |
416 | if (direction == KVM_EXIT_IO_IN) { | |
417 | switch (size) { | |
418 | case 1: | |
419 | stb_p(ptr, cpu_inb(env, port)); | |
420 | break; | |
421 | case 2: | |
422 | stw_p(ptr, cpu_inw(env, port)); | |
423 | break; | |
424 | case 4: | |
425 | stl_p(ptr, cpu_inl(env, port)); | |
426 | break; | |
427 | } | |
428 | } else { | |
429 | switch (size) { | |
430 | case 1: | |
431 | cpu_outb(env, port, ldub_p(ptr)); | |
432 | break; | |
433 | case 2: | |
434 | cpu_outw(env, port, lduw_p(ptr)); | |
435 | break; | |
436 | case 4: | |
437 | cpu_outl(env, port, ldl_p(ptr)); | |
438 | break; | |
439 | } | |
440 | } | |
441 | ||
442 | ptr += size; | |
443 | } | |
444 | ||
445 | return 1; | |
446 | } | |
447 | ||
f65ed4c1 AL |
448 | static void kvm_run_coalesced_mmio(CPUState *env, struct kvm_run *run) |
449 | { | |
450 | #ifdef KVM_CAP_COALESCED_MMIO | |
451 | KVMState *s = kvm_state; | |
452 | if (s->coalesced_mmio) { | |
453 | struct kvm_coalesced_mmio_ring *ring; | |
454 | ||
455 | ring = (void *)run + (s->coalesced_mmio * TARGET_PAGE_SIZE); | |
456 | while (ring->first != ring->last) { | |
457 | struct kvm_coalesced_mmio *ent; | |
458 | ||
459 | ent = &ring->coalesced_mmio[ring->first]; | |
460 | ||
461 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
462 | /* FIXME smp_wmb() */ | |
463 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; | |
464 | } | |
465 | } | |
466 | #endif | |
467 | } | |
468 | ||
05330448 AL |
469 | int kvm_cpu_exec(CPUState *env) |
470 | { | |
471 | struct kvm_run *run = env->kvm_run; | |
472 | int ret; | |
473 | ||
474 | dprintf("kvm_cpu_exec()\n"); | |
475 | ||
476 | do { | |
477 | kvm_arch_pre_run(env, run); | |
478 | ||
be214e6c | 479 | if (env->exit_request) { |
05330448 AL |
480 | dprintf("interrupt exit requested\n"); |
481 | ret = 0; | |
482 | break; | |
483 | } | |
484 | ||
485 | ret = kvm_vcpu_ioctl(env, KVM_RUN, 0); | |
486 | kvm_arch_post_run(env, run); | |
487 | ||
488 | if (ret == -EINTR || ret == -EAGAIN) { | |
489 | dprintf("io window exit\n"); | |
490 | ret = 0; | |
491 | break; | |
492 | } | |
493 | ||
494 | if (ret < 0) { | |
495 | dprintf("kvm run failed %s\n", strerror(-ret)); | |
496 | abort(); | |
497 | } | |
498 | ||
f65ed4c1 AL |
499 | kvm_run_coalesced_mmio(env, run); |
500 | ||
05330448 AL |
501 | ret = 0; /* exit loop */ |
502 | switch (run->exit_reason) { | |
503 | case KVM_EXIT_IO: | |
504 | dprintf("handle_io\n"); | |
505 | ret = kvm_handle_io(env, run->io.port, | |
506 | (uint8_t *)run + run->io.data_offset, | |
507 | run->io.direction, | |
508 | run->io.size, | |
509 | run->io.count); | |
510 | break; | |
511 | case KVM_EXIT_MMIO: | |
512 | dprintf("handle_mmio\n"); | |
513 | cpu_physical_memory_rw(run->mmio.phys_addr, | |
514 | run->mmio.data, | |
515 | run->mmio.len, | |
516 | run->mmio.is_write); | |
517 | ret = 1; | |
518 | break; | |
519 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
520 | dprintf("irq_window_open\n"); | |
521 | break; | |
522 | case KVM_EXIT_SHUTDOWN: | |
523 | dprintf("shutdown\n"); | |
524 | qemu_system_reset_request(); | |
525 | ret = 1; | |
526 | break; | |
527 | case KVM_EXIT_UNKNOWN: | |
528 | dprintf("kvm_exit_unknown\n"); | |
529 | break; | |
530 | case KVM_EXIT_FAIL_ENTRY: | |
531 | dprintf("kvm_exit_fail_entry\n"); | |
532 | break; | |
533 | case KVM_EXIT_EXCEPTION: | |
534 | dprintf("kvm_exit_exception\n"); | |
535 | break; | |
536 | case KVM_EXIT_DEBUG: | |
537 | dprintf("kvm_exit_debug\n"); | |
e22a25c9 AL |
538 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
539 | if (kvm_arch_debug(&run->debug.arch)) { | |
540 | gdb_set_stop_cpu(env); | |
541 | vm_stop(EXCP_DEBUG); | |
542 | env->exception_index = EXCP_DEBUG; | |
543 | return 0; | |
544 | } | |
545 | /* re-enter, this exception was guest-internal */ | |
546 | ret = 1; | |
547 | #endif /* KVM_CAP_SET_GUEST_DEBUG */ | |
05330448 AL |
548 | break; |
549 | default: | |
550 | dprintf("kvm_arch_handle_exit\n"); | |
551 | ret = kvm_arch_handle_exit(env, run); | |
552 | break; | |
553 | } | |
554 | } while (ret > 0); | |
555 | ||
be214e6c AJ |
556 | if (env->exit_request) { |
557 | env->exit_request = 0; | |
becfc390 AL |
558 | env->exception_index = EXCP_INTERRUPT; |
559 | } | |
560 | ||
05330448 AL |
561 | return ret; |
562 | } | |
563 | ||
564 | void kvm_set_phys_mem(target_phys_addr_t start_addr, | |
565 | ram_addr_t size, | |
566 | ram_addr_t phys_offset) | |
567 | { | |
568 | KVMState *s = kvm_state; | |
569 | ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; | |
570 | KVMSlot *mem; | |
571 | ||
d3f8d37f AL |
572 | if (start_addr & ~TARGET_PAGE_MASK) { |
573 | fprintf(stderr, "Only page-aligned memory slots supported\n"); | |
574 | abort(); | |
575 | } | |
576 | ||
05330448 AL |
577 | /* KVM does not support read-only slots */ |
578 | phys_offset &= ~IO_MEM_ROM; | |
579 | ||
580 | mem = kvm_lookup_slot(s, start_addr); | |
581 | if (mem) { | |
494ada42 | 582 | if (flags >= IO_MEM_UNASSIGNED) { |
05330448 | 583 | mem->memory_size = 0; |
34fc643f AL |
584 | mem->start_addr = start_addr; |
585 | mem->phys_offset = 0; | |
05330448 AL |
586 | mem->flags = 0; |
587 | ||
34fc643f AL |
588 | kvm_set_user_memory_region(s, mem); |
589 | } else if (start_addr >= mem->start_addr && | |
590 | (start_addr + size) <= (mem->start_addr + | |
62d60e8c AL |
591 | mem->memory_size)) { |
592 | KVMSlot slot; | |
593 | target_phys_addr_t mem_start; | |
594 | ram_addr_t mem_size, mem_offset; | |
595 | ||
596 | /* Not splitting */ | |
34fc643f AL |
597 | if ((phys_offset - (start_addr - mem->start_addr)) == |
598 | mem->phys_offset) | |
62d60e8c AL |
599 | return; |
600 | ||
601 | /* unregister whole slot */ | |
602 | memcpy(&slot, mem, sizeof(slot)); | |
603 | mem->memory_size = 0; | |
34fc643f | 604 | kvm_set_user_memory_region(s, mem); |
62d60e8c AL |
605 | |
606 | /* register prefix slot */ | |
34fc643f AL |
607 | mem_start = slot.start_addr; |
608 | mem_size = start_addr - slot.start_addr; | |
609 | mem_offset = slot.phys_offset; | |
62d60e8c AL |
610 | if (mem_size) |
611 | kvm_set_phys_mem(mem_start, mem_size, mem_offset); | |
612 | ||
613 | /* register new slot */ | |
614 | kvm_set_phys_mem(start_addr, size, phys_offset); | |
615 | ||
616 | /* register suffix slot */ | |
617 | mem_start = start_addr + size; | |
618 | mem_offset += mem_size + size; | |
619 | mem_size = slot.memory_size - mem_size - size; | |
620 | if (mem_size) | |
621 | kvm_set_phys_mem(mem_start, mem_size, mem_offset); | |
622 | ||
05330448 | 623 | return; |
62d60e8c AL |
624 | } else { |
625 | printf("Registering overlapping slot\n"); | |
626 | abort(); | |
627 | } | |
05330448 | 628 | } |
05330448 AL |
629 | /* KVM does not need to know about this memory */ |
630 | if (flags >= IO_MEM_UNASSIGNED) | |
631 | return; | |
632 | ||
633 | mem = kvm_alloc_slot(s); | |
634 | mem->memory_size = size; | |
34fc643f AL |
635 | mem->start_addr = start_addr; |
636 | mem->phys_offset = phys_offset; | |
05330448 AL |
637 | mem->flags = 0; |
638 | ||
34fc643f | 639 | kvm_set_user_memory_region(s, mem); |
05330448 AL |
640 | /* FIXME deal with errors */ |
641 | } | |
642 | ||
984b5181 | 643 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
644 | { |
645 | int ret; | |
984b5181 AL |
646 | void *arg; |
647 | va_list ap; | |
05330448 | 648 | |
984b5181 AL |
649 | va_start(ap, type); |
650 | arg = va_arg(ap, void *); | |
651 | va_end(ap); | |
652 | ||
653 | ret = ioctl(s->fd, type, arg); | |
05330448 AL |
654 | if (ret == -1) |
655 | ret = -errno; | |
656 | ||
657 | return ret; | |
658 | } | |
659 | ||
984b5181 | 660 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
661 | { |
662 | int ret; | |
984b5181 AL |
663 | void *arg; |
664 | va_list ap; | |
665 | ||
666 | va_start(ap, type); | |
667 | arg = va_arg(ap, void *); | |
668 | va_end(ap); | |
05330448 | 669 | |
984b5181 | 670 | ret = ioctl(s->vmfd, type, arg); |
05330448 AL |
671 | if (ret == -1) |
672 | ret = -errno; | |
673 | ||
674 | return ret; | |
675 | } | |
676 | ||
984b5181 | 677 | int kvm_vcpu_ioctl(CPUState *env, int type, ...) |
05330448 AL |
678 | { |
679 | int ret; | |
984b5181 AL |
680 | void *arg; |
681 | va_list ap; | |
682 | ||
683 | va_start(ap, type); | |
684 | arg = va_arg(ap, void *); | |
685 | va_end(ap); | |
05330448 | 686 | |
984b5181 | 687 | ret = ioctl(env->kvm_fd, type, arg); |
05330448 AL |
688 | if (ret == -1) |
689 | ret = -errno; | |
690 | ||
691 | return ret; | |
692 | } | |
bd322087 AL |
693 | |
694 | int kvm_has_sync_mmu(void) | |
695 | { | |
a9c11522 | 696 | #ifdef KVM_CAP_SYNC_MMU |
bd322087 AL |
697 | KVMState *s = kvm_state; |
698 | ||
bd322087 AL |
699 | if (kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_SYNC_MMU) > 0) |
700 | return 1; | |
701 | #endif | |
702 | ||
703 | return 0; | |
704 | } | |
e22a25c9 AL |
705 | |
706 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
707 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env, | |
708 | target_ulong pc) | |
709 | { | |
710 | struct kvm_sw_breakpoint *bp; | |
711 | ||
712 | TAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { | |
713 | if (bp->pc == pc) | |
714 | return bp; | |
715 | } | |
716 | return NULL; | |
717 | } | |
718 | ||
719 | int kvm_sw_breakpoints_active(CPUState *env) | |
720 | { | |
721 | return !TAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints); | |
722 | } | |
723 | ||
724 | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) | |
725 | { | |
726 | struct kvm_guest_debug dbg; | |
727 | ||
728 | dbg.control = 0; | |
729 | if (env->singlestep_enabled) | |
730 | dbg.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; | |
731 | ||
732 | kvm_arch_update_guest_debug(env, &dbg); | |
733 | dbg.control |= reinject_trap; | |
734 | ||
735 | return kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg); | |
736 | } | |
737 | ||
738 | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr, | |
739 | target_ulong len, int type) | |
740 | { | |
741 | struct kvm_sw_breakpoint *bp; | |
742 | CPUState *env; | |
743 | int err; | |
744 | ||
745 | if (type == GDB_BREAKPOINT_SW) { | |
746 | bp = kvm_find_sw_breakpoint(current_env, addr); | |
747 | if (bp) { | |
748 | bp->use_count++; | |
749 | return 0; | |
750 | } | |
751 | ||
752 | bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint)); | |
753 | if (!bp) | |
754 | return -ENOMEM; | |
755 | ||
756 | bp->pc = addr; | |
757 | bp->use_count = 1; | |
758 | err = kvm_arch_insert_sw_breakpoint(current_env, bp); | |
759 | if (err) { | |
760 | free(bp); | |
761 | return err; | |
762 | } | |
763 | ||
764 | TAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, | |
765 | bp, entry); | |
766 | } else { | |
767 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
768 | if (err) | |
769 | return err; | |
770 | } | |
771 | ||
772 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
773 | err = kvm_update_guest_debug(env, 0); | |
774 | if (err) | |
775 | return err; | |
776 | } | |
777 | return 0; | |
778 | } | |
779 | ||
780 | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr, | |
781 | target_ulong len, int type) | |
782 | { | |
783 | struct kvm_sw_breakpoint *bp; | |
784 | CPUState *env; | |
785 | int err; | |
786 | ||
787 | if (type == GDB_BREAKPOINT_SW) { | |
788 | bp = kvm_find_sw_breakpoint(current_env, addr); | |
789 | if (!bp) | |
790 | return -ENOENT; | |
791 | ||
792 | if (bp->use_count > 1) { | |
793 | bp->use_count--; | |
794 | return 0; | |
795 | } | |
796 | ||
797 | err = kvm_arch_remove_sw_breakpoint(current_env, bp); | |
798 | if (err) | |
799 | return err; | |
800 | ||
801 | TAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); | |
802 | qemu_free(bp); | |
803 | } else { | |
804 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
805 | if (err) | |
806 | return err; | |
807 | } | |
808 | ||
809 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
810 | err = kvm_update_guest_debug(env, 0); | |
811 | if (err) | |
812 | return err; | |
813 | } | |
814 | return 0; | |
815 | } | |
816 | ||
817 | void kvm_remove_all_breakpoints(CPUState *current_env) | |
818 | { | |
819 | struct kvm_sw_breakpoint *bp, *next; | |
820 | KVMState *s = current_env->kvm_state; | |
821 | CPUState *env; | |
822 | ||
823 | TAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { | |
824 | if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { | |
825 | /* Try harder to find a CPU that currently sees the breakpoint. */ | |
826 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
827 | if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) | |
828 | break; | |
829 | } | |
830 | } | |
831 | } | |
832 | kvm_arch_remove_all_hw_breakpoints(); | |
833 | ||
834 | for (env = first_cpu; env != NULL; env = env->next_cpu) | |
835 | kvm_update_guest_debug(env, 0); | |
836 | } | |
837 | ||
838 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
839 | ||
840 | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) | |
841 | { | |
842 | return -EINVAL; | |
843 | } | |
844 | ||
845 | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr, | |
846 | target_ulong len, int type) | |
847 | { | |
848 | return -EINVAL; | |
849 | } | |
850 | ||
851 | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr, | |
852 | target_ulong len, int type) | |
853 | { | |
854 | return -EINVAL; | |
855 | } | |
856 | ||
857 | void kvm_remove_all_breakpoints(CPUState *current_env) | |
858 | { | |
859 | } | |
860 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ |