]>
Commit | Line | Data |
---|---|---|
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" | |
d33a1810 | 25 | #include "hw/hw.h" |
e22a25c9 | 26 | #include "gdbstub.h" |
05330448 AL |
27 | #include "kvm.h" |
28 | ||
f65ed4c1 AL |
29 | /* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */ |
30 | #define PAGE_SIZE TARGET_PAGE_SIZE | |
31 | ||
05330448 AL |
32 | //#define DEBUG_KVM |
33 | ||
34 | #ifdef DEBUG_KVM | |
35 | #define dprintf(fmt, ...) \ | |
36 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
37 | #else | |
38 | #define dprintf(fmt, ...) \ | |
39 | do { } while (0) | |
40 | #endif | |
41 | ||
34fc643f AL |
42 | typedef struct KVMSlot |
43 | { | |
c227f099 AL |
44 | target_phys_addr_t start_addr; |
45 | ram_addr_t memory_size; | |
46 | ram_addr_t phys_offset; | |
34fc643f AL |
47 | int slot; |
48 | int flags; | |
49 | } KVMSlot; | |
05330448 | 50 | |
5832d1f2 AL |
51 | typedef struct kvm_dirty_log KVMDirtyLog; |
52 | ||
05330448 AL |
53 | int kvm_allowed = 0; |
54 | ||
55 | struct KVMState | |
56 | { | |
57 | KVMSlot slots[32]; | |
58 | int fd; | |
59 | int vmfd; | |
4c0960c0 | 60 | int regs_modified; |
f65ed4c1 | 61 | int coalesced_mmio; |
e69917e2 | 62 | int broken_set_mem_region; |
4495d6a7 | 63 | int migration_log; |
e22a25c9 AL |
64 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
65 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; | |
66 | #endif | |
6f725c13 GC |
67 | int irqchip_in_kernel; |
68 | int pit_in_kernel; | |
05330448 AL |
69 | }; |
70 | ||
71 | static KVMState *kvm_state; | |
72 | ||
73 | static KVMSlot *kvm_alloc_slot(KVMState *s) | |
74 | { | |
75 | int i; | |
76 | ||
77 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
62d60e8c AL |
78 | /* KVM private memory slots */ |
79 | if (i >= 8 && i < 12) | |
80 | continue; | |
05330448 AL |
81 | if (s->slots[i].memory_size == 0) |
82 | return &s->slots[i]; | |
83 | } | |
84 | ||
d3f8d37f AL |
85 | fprintf(stderr, "%s: no free slot available\n", __func__); |
86 | abort(); | |
87 | } | |
88 | ||
89 | static KVMSlot *kvm_lookup_matching_slot(KVMState *s, | |
c227f099 AL |
90 | target_phys_addr_t start_addr, |
91 | target_phys_addr_t end_addr) | |
d3f8d37f AL |
92 | { |
93 | int i; | |
94 | ||
95 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
96 | KVMSlot *mem = &s->slots[i]; | |
97 | ||
98 | if (start_addr == mem->start_addr && | |
99 | end_addr == mem->start_addr + mem->memory_size) { | |
100 | return mem; | |
101 | } | |
102 | } | |
103 | ||
05330448 AL |
104 | return NULL; |
105 | } | |
106 | ||
6152e2ae AL |
107 | /* |
108 | * Find overlapping slot with lowest start address | |
109 | */ | |
110 | static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s, | |
c227f099 AL |
111 | target_phys_addr_t start_addr, |
112 | target_phys_addr_t end_addr) | |
05330448 | 113 | { |
6152e2ae | 114 | KVMSlot *found = NULL; |
05330448 AL |
115 | int i; |
116 | ||
117 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
118 | KVMSlot *mem = &s->slots[i]; | |
119 | ||
6152e2ae AL |
120 | if (mem->memory_size == 0 || |
121 | (found && found->start_addr < mem->start_addr)) { | |
122 | continue; | |
123 | } | |
124 | ||
125 | if (end_addr > mem->start_addr && | |
126 | start_addr < mem->start_addr + mem->memory_size) { | |
127 | found = mem; | |
128 | } | |
05330448 AL |
129 | } |
130 | ||
6152e2ae | 131 | return found; |
05330448 AL |
132 | } |
133 | ||
5832d1f2 AL |
134 | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
135 | { | |
136 | struct kvm_userspace_memory_region mem; | |
137 | ||
138 | mem.slot = slot->slot; | |
139 | mem.guest_phys_addr = slot->start_addr; | |
140 | mem.memory_size = slot->memory_size; | |
5579c7f3 | 141 | mem.userspace_addr = (unsigned long)qemu_get_ram_ptr(slot->phys_offset); |
5832d1f2 | 142 | mem.flags = slot->flags; |
4495d6a7 JK |
143 | if (s->migration_log) { |
144 | mem.flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
145 | } | |
5832d1f2 AL |
146 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
147 | } | |
148 | ||
8d2ba1fb JK |
149 | static void kvm_reset_vcpu(void *opaque) |
150 | { | |
151 | CPUState *env = opaque; | |
152 | ||
caa5af0f | 153 | kvm_arch_reset_vcpu(env); |
8d2ba1fb JK |
154 | if (kvm_arch_put_registers(env)) { |
155 | fprintf(stderr, "Fatal: kvm vcpu reset failed\n"); | |
156 | abort(); | |
157 | } | |
158 | } | |
5832d1f2 | 159 | |
6f725c13 GC |
160 | int kvm_irqchip_in_kernel(void) |
161 | { | |
162 | return kvm_state->irqchip_in_kernel; | |
163 | } | |
164 | ||
165 | int kvm_pit_in_kernel(void) | |
166 | { | |
167 | return kvm_state->pit_in_kernel; | |
168 | } | |
169 | ||
170 | ||
05330448 AL |
171 | int kvm_init_vcpu(CPUState *env) |
172 | { | |
173 | KVMState *s = kvm_state; | |
174 | long mmap_size; | |
175 | int ret; | |
176 | ||
177 | dprintf("kvm_init_vcpu\n"); | |
178 | ||
984b5181 | 179 | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
05330448 AL |
180 | if (ret < 0) { |
181 | dprintf("kvm_create_vcpu failed\n"); | |
182 | goto err; | |
183 | } | |
184 | ||
185 | env->kvm_fd = ret; | |
186 | env->kvm_state = s; | |
187 | ||
188 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
189 | if (mmap_size < 0) { | |
190 | dprintf("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
191 | goto err; | |
192 | } | |
193 | ||
194 | env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
195 | env->kvm_fd, 0); | |
196 | if (env->kvm_run == MAP_FAILED) { | |
197 | ret = -errno; | |
198 | dprintf("mmap'ing vcpu state failed\n"); | |
199 | goto err; | |
200 | } | |
201 | ||
202 | ret = kvm_arch_init_vcpu(env); | |
8d2ba1fb | 203 | if (ret == 0) { |
a08d4367 | 204 | qemu_register_reset(kvm_reset_vcpu, env); |
caa5af0f | 205 | kvm_arch_reset_vcpu(env); |
8d2ba1fb JK |
206 | ret = kvm_arch_put_registers(env); |
207 | } | |
05330448 AL |
208 | err: |
209 | return ret; | |
210 | } | |
211 | ||
5832d1f2 AL |
212 | /* |
213 | * dirty pages logging control | |
214 | */ | |
c227f099 AL |
215 | static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, |
216 | ram_addr_t size, int flags, int mask) | |
5832d1f2 AL |
217 | { |
218 | KVMState *s = kvm_state; | |
d3f8d37f | 219 | KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); |
4495d6a7 JK |
220 | int old_flags; |
221 | ||
5832d1f2 | 222 | if (mem == NULL) { |
d3f8d37f AL |
223 | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" |
224 | TARGET_FMT_plx "\n", __func__, phys_addr, | |
c227f099 | 225 | (target_phys_addr_t)(phys_addr + size - 1)); |
5832d1f2 AL |
226 | return -EINVAL; |
227 | } | |
228 | ||
4495d6a7 | 229 | old_flags = mem->flags; |
5832d1f2 | 230 | |
4495d6a7 | 231 | flags = (mem->flags & ~mask) | flags; |
5832d1f2 AL |
232 | mem->flags = flags; |
233 | ||
4495d6a7 JK |
234 | /* If nothing changed effectively, no need to issue ioctl */ |
235 | if (s->migration_log) { | |
236 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
237 | } | |
238 | if (flags == old_flags) { | |
239 | return 0; | |
240 | } | |
241 | ||
5832d1f2 AL |
242 | return kvm_set_user_memory_region(s, mem); |
243 | } | |
244 | ||
c227f099 | 245 | int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size) |
5832d1f2 | 246 | { |
d3f8d37f | 247 | return kvm_dirty_pages_log_change(phys_addr, size, |
5832d1f2 AL |
248 | KVM_MEM_LOG_DIRTY_PAGES, |
249 | KVM_MEM_LOG_DIRTY_PAGES); | |
250 | } | |
251 | ||
c227f099 | 252 | int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size) |
5832d1f2 | 253 | { |
d3f8d37f | 254 | return kvm_dirty_pages_log_change(phys_addr, size, |
5832d1f2 AL |
255 | 0, |
256 | KVM_MEM_LOG_DIRTY_PAGES); | |
257 | } | |
258 | ||
4495d6a7 JK |
259 | int kvm_set_migration_log(int enable) |
260 | { | |
261 | KVMState *s = kvm_state; | |
262 | KVMSlot *mem; | |
263 | int i, err; | |
264 | ||
265 | s->migration_log = enable; | |
266 | ||
267 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
268 | mem = &s->slots[i]; | |
269 | ||
270 | if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) { | |
271 | continue; | |
272 | } | |
273 | err = kvm_set_user_memory_region(s, mem); | |
274 | if (err) { | |
275 | return err; | |
276 | } | |
277 | } | |
278 | return 0; | |
279 | } | |
280 | ||
96c1606b AG |
281 | static int test_le_bit(unsigned long nr, unsigned char *addr) |
282 | { | |
283 | return (addr[nr >> 3] >> (nr & 7)) & 1; | |
284 | } | |
285 | ||
5832d1f2 AL |
286 | /** |
287 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
288 | * This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty(). | |
289 | * This means all bits are set to dirty. | |
290 | * | |
d3f8d37f | 291 | * @start_add: start of logged region. |
5832d1f2 AL |
292 | * @end_addr: end of logged region. |
293 | */ | |
c227f099 AL |
294 | int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, |
295 | target_phys_addr_t end_addr) | |
5832d1f2 AL |
296 | { |
297 | KVMState *s = kvm_state; | |
151f7749 | 298 | unsigned long size, allocated_size = 0; |
c227f099 AL |
299 | target_phys_addr_t phys_addr; |
300 | ram_addr_t addr; | |
151f7749 JK |
301 | KVMDirtyLog d; |
302 | KVMSlot *mem; | |
303 | int ret = 0; | |
5832d1f2 | 304 | |
151f7749 JK |
305 | d.dirty_bitmap = NULL; |
306 | while (start_addr < end_addr) { | |
307 | mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); | |
308 | if (mem == NULL) { | |
309 | break; | |
310 | } | |
5832d1f2 | 311 | |
151f7749 JK |
312 | size = ((mem->memory_size >> TARGET_PAGE_BITS) + 7) / 8; |
313 | if (!d.dirty_bitmap) { | |
314 | d.dirty_bitmap = qemu_malloc(size); | |
315 | } else if (size > allocated_size) { | |
316 | d.dirty_bitmap = qemu_realloc(d.dirty_bitmap, size); | |
317 | } | |
318 | allocated_size = size; | |
319 | memset(d.dirty_bitmap, 0, allocated_size); | |
5832d1f2 | 320 | |
151f7749 | 321 | d.slot = mem->slot; |
5832d1f2 | 322 | |
6e489f3f | 323 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
151f7749 JK |
324 | dprintf("ioctl failed %d\n", errno); |
325 | ret = -1; | |
326 | break; | |
327 | } | |
5832d1f2 | 328 | |
151f7749 JK |
329 | for (phys_addr = mem->start_addr, addr = mem->phys_offset; |
330 | phys_addr < mem->start_addr + mem->memory_size; | |
331 | phys_addr += TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { | |
96c1606b | 332 | unsigned char *bitmap = (unsigned char *)d.dirty_bitmap; |
151f7749 | 333 | unsigned nr = (phys_addr - mem->start_addr) >> TARGET_PAGE_BITS; |
151f7749 | 334 | |
96c1606b | 335 | if (test_le_bit(nr, bitmap)) { |
151f7749 JK |
336 | cpu_physical_memory_set_dirty(addr); |
337 | } | |
338 | } | |
339 | start_addr = phys_addr; | |
5832d1f2 | 340 | } |
5832d1f2 | 341 | qemu_free(d.dirty_bitmap); |
151f7749 JK |
342 | |
343 | return ret; | |
5832d1f2 AL |
344 | } |
345 | ||
c227f099 | 346 | int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) |
f65ed4c1 AL |
347 | { |
348 | int ret = -ENOSYS; | |
349 | #ifdef KVM_CAP_COALESCED_MMIO | |
350 | KVMState *s = kvm_state; | |
351 | ||
352 | if (s->coalesced_mmio) { | |
353 | struct kvm_coalesced_mmio_zone zone; | |
354 | ||
355 | zone.addr = start; | |
356 | zone.size = size; | |
357 | ||
358 | ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
359 | } | |
360 | #endif | |
361 | ||
362 | return ret; | |
363 | } | |
364 | ||
c227f099 | 365 | int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) |
f65ed4c1 AL |
366 | { |
367 | int ret = -ENOSYS; | |
368 | #ifdef KVM_CAP_COALESCED_MMIO | |
369 | KVMState *s = kvm_state; | |
370 | ||
371 | if (s->coalesced_mmio) { | |
372 | struct kvm_coalesced_mmio_zone zone; | |
373 | ||
374 | zone.addr = start; | |
375 | zone.size = size; | |
376 | ||
377 | ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
378 | } | |
379 | #endif | |
380 | ||
381 | return ret; | |
382 | } | |
383 | ||
ad7b8b33 AL |
384 | int kvm_check_extension(KVMState *s, unsigned int extension) |
385 | { | |
386 | int ret; | |
387 | ||
388 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
389 | if (ret < 0) { | |
390 | ret = 0; | |
391 | } | |
392 | ||
393 | return ret; | |
394 | } | |
395 | ||
05330448 AL |
396 | int kvm_init(int smp_cpus) |
397 | { | |
168ccc11 JK |
398 | static const char upgrade_note[] = |
399 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
400 | "(see http://sourceforge.net/projects/kvm).\n"; | |
05330448 AL |
401 | KVMState *s; |
402 | int ret; | |
403 | int i; | |
404 | ||
9f8fd694 MM |
405 | if (smp_cpus > 1) { |
406 | fprintf(stderr, "No SMP KVM support, use '-smp 1'\n"); | |
05330448 | 407 | return -EINVAL; |
9f8fd694 | 408 | } |
05330448 AL |
409 | |
410 | s = qemu_mallocz(sizeof(KVMState)); | |
05330448 | 411 | |
e22a25c9 | 412 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 413 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 414 | #endif |
05330448 AL |
415 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) |
416 | s->slots[i].slot = i; | |
417 | ||
418 | s->vmfd = -1; | |
419 | s->fd = open("/dev/kvm", O_RDWR); | |
420 | if (s->fd == -1) { | |
421 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
422 | ret = -errno; | |
423 | goto err; | |
424 | } | |
425 | ||
426 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
427 | if (ret < KVM_API_VERSION) { | |
428 | if (ret > 0) | |
429 | ret = -EINVAL; | |
430 | fprintf(stderr, "kvm version too old\n"); | |
431 | goto err; | |
432 | } | |
433 | ||
434 | if (ret > KVM_API_VERSION) { | |
435 | ret = -EINVAL; | |
436 | fprintf(stderr, "kvm version not supported\n"); | |
437 | goto err; | |
438 | } | |
439 | ||
440 | s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0); | |
441 | if (s->vmfd < 0) | |
442 | goto err; | |
443 | ||
444 | /* initially, KVM allocated its own memory and we had to jump through | |
445 | * hooks to make phys_ram_base point to this. Modern versions of KVM | |
5579c7f3 | 446 | * just use a user allocated buffer so we can use regular pages |
05330448 AL |
447 | * unmodified. Make sure we have a sufficiently modern version of KVM. |
448 | */ | |
ad7b8b33 AL |
449 | if (!kvm_check_extension(s, KVM_CAP_USER_MEMORY)) { |
450 | ret = -EINVAL; | |
168ccc11 JK |
451 | fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n%s", |
452 | upgrade_note); | |
05330448 AL |
453 | goto err; |
454 | } | |
455 | ||
d85dc283 AL |
456 | /* There was a nasty bug in < kvm-80 that prevents memory slots from being |
457 | * destroyed properly. Since we rely on this capability, refuse to work | |
458 | * with any kernel without this capability. */ | |
ad7b8b33 AL |
459 | if (!kvm_check_extension(s, KVM_CAP_DESTROY_MEMORY_REGION_WORKS)) { |
460 | ret = -EINVAL; | |
d85dc283 AL |
461 | |
462 | fprintf(stderr, | |
168ccc11 JK |
463 | "KVM kernel module broken (DESTROY_MEMORY_REGION).\n%s", |
464 | upgrade_note); | |
d85dc283 AL |
465 | goto err; |
466 | } | |
467 | ||
f65ed4c1 | 468 | #ifdef KVM_CAP_COALESCED_MMIO |
ad7b8b33 AL |
469 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
470 | #else | |
471 | s->coalesced_mmio = 0; | |
f65ed4c1 AL |
472 | #endif |
473 | ||
e69917e2 JK |
474 | s->broken_set_mem_region = 1; |
475 | #ifdef KVM_CAP_JOIN_MEMORY_REGIONS_WORKS | |
476 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); | |
477 | if (ret > 0) { | |
478 | s->broken_set_mem_region = 0; | |
479 | } | |
480 | #endif | |
481 | ||
05330448 AL |
482 | ret = kvm_arch_init(s, smp_cpus); |
483 | if (ret < 0) | |
484 | goto err; | |
485 | ||
486 | kvm_state = s; | |
487 | ||
488 | return 0; | |
489 | ||
490 | err: | |
491 | if (s) { | |
492 | if (s->vmfd != -1) | |
493 | close(s->vmfd); | |
494 | if (s->fd != -1) | |
495 | close(s->fd); | |
496 | } | |
497 | qemu_free(s); | |
498 | ||
499 | return ret; | |
500 | } | |
501 | ||
afcea8cb BS |
502 | static int kvm_handle_io(uint16_t port, void *data, int direction, int size, |
503 | uint32_t count) | |
05330448 AL |
504 | { |
505 | int i; | |
506 | uint8_t *ptr = data; | |
507 | ||
508 | for (i = 0; i < count; i++) { | |
509 | if (direction == KVM_EXIT_IO_IN) { | |
510 | switch (size) { | |
511 | case 1: | |
afcea8cb | 512 | stb_p(ptr, cpu_inb(port)); |
05330448 AL |
513 | break; |
514 | case 2: | |
afcea8cb | 515 | stw_p(ptr, cpu_inw(port)); |
05330448 AL |
516 | break; |
517 | case 4: | |
afcea8cb | 518 | stl_p(ptr, cpu_inl(port)); |
05330448 AL |
519 | break; |
520 | } | |
521 | } else { | |
522 | switch (size) { | |
523 | case 1: | |
afcea8cb | 524 | cpu_outb(port, ldub_p(ptr)); |
05330448 AL |
525 | break; |
526 | case 2: | |
afcea8cb | 527 | cpu_outw(port, lduw_p(ptr)); |
05330448 AL |
528 | break; |
529 | case 4: | |
afcea8cb | 530 | cpu_outl(port, ldl_p(ptr)); |
05330448 AL |
531 | break; |
532 | } | |
533 | } | |
534 | ||
535 | ptr += size; | |
536 | } | |
537 | ||
538 | return 1; | |
539 | } | |
540 | ||
f65ed4c1 AL |
541 | static void kvm_run_coalesced_mmio(CPUState *env, struct kvm_run *run) |
542 | { | |
543 | #ifdef KVM_CAP_COALESCED_MMIO | |
544 | KVMState *s = kvm_state; | |
545 | if (s->coalesced_mmio) { | |
546 | struct kvm_coalesced_mmio_ring *ring; | |
547 | ||
548 | ring = (void *)run + (s->coalesced_mmio * TARGET_PAGE_SIZE); | |
549 | while (ring->first != ring->last) { | |
550 | struct kvm_coalesced_mmio *ent; | |
551 | ||
552 | ent = &ring->coalesced_mmio[ring->first]; | |
553 | ||
554 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
555 | /* FIXME smp_wmb() */ | |
556 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; | |
557 | } | |
558 | } | |
559 | #endif | |
560 | } | |
561 | ||
4c0960c0 AK |
562 | void kvm_cpu_synchronize_state(CPUState *env) |
563 | { | |
564 | if (!env->kvm_state->regs_modified) { | |
565 | kvm_arch_get_registers(env); | |
566 | env->kvm_state->regs_modified = 1; | |
567 | } | |
568 | } | |
569 | ||
05330448 AL |
570 | int kvm_cpu_exec(CPUState *env) |
571 | { | |
572 | struct kvm_run *run = env->kvm_run; | |
573 | int ret; | |
574 | ||
575 | dprintf("kvm_cpu_exec()\n"); | |
576 | ||
577 | do { | |
be214e6c | 578 | if (env->exit_request) { |
05330448 AL |
579 | dprintf("interrupt exit requested\n"); |
580 | ret = 0; | |
581 | break; | |
582 | } | |
583 | ||
4c0960c0 AK |
584 | if (env->kvm_state->regs_modified) { |
585 | kvm_arch_put_registers(env); | |
586 | env->kvm_state->regs_modified = 0; | |
587 | } | |
588 | ||
8c14c173 | 589 | kvm_arch_pre_run(env, run); |
d549db5a | 590 | qemu_mutex_unlock_iothread(); |
05330448 | 591 | ret = kvm_vcpu_ioctl(env, KVM_RUN, 0); |
d549db5a | 592 | qemu_mutex_lock_iothread(); |
05330448 AL |
593 | kvm_arch_post_run(env, run); |
594 | ||
595 | if (ret == -EINTR || ret == -EAGAIN) { | |
596 | dprintf("io window exit\n"); | |
597 | ret = 0; | |
598 | break; | |
599 | } | |
600 | ||
601 | if (ret < 0) { | |
602 | dprintf("kvm run failed %s\n", strerror(-ret)); | |
603 | abort(); | |
604 | } | |
605 | ||
f65ed4c1 AL |
606 | kvm_run_coalesced_mmio(env, run); |
607 | ||
05330448 AL |
608 | ret = 0; /* exit loop */ |
609 | switch (run->exit_reason) { | |
610 | case KVM_EXIT_IO: | |
611 | dprintf("handle_io\n"); | |
afcea8cb | 612 | ret = kvm_handle_io(run->io.port, |
05330448 AL |
613 | (uint8_t *)run + run->io.data_offset, |
614 | run->io.direction, | |
615 | run->io.size, | |
616 | run->io.count); | |
617 | break; | |
618 | case KVM_EXIT_MMIO: | |
619 | dprintf("handle_mmio\n"); | |
620 | cpu_physical_memory_rw(run->mmio.phys_addr, | |
621 | run->mmio.data, | |
622 | run->mmio.len, | |
623 | run->mmio.is_write); | |
624 | ret = 1; | |
625 | break; | |
626 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
627 | dprintf("irq_window_open\n"); | |
628 | break; | |
629 | case KVM_EXIT_SHUTDOWN: | |
630 | dprintf("shutdown\n"); | |
631 | qemu_system_reset_request(); | |
632 | ret = 1; | |
633 | break; | |
634 | case KVM_EXIT_UNKNOWN: | |
635 | dprintf("kvm_exit_unknown\n"); | |
636 | break; | |
637 | case KVM_EXIT_FAIL_ENTRY: | |
638 | dprintf("kvm_exit_fail_entry\n"); | |
639 | break; | |
640 | case KVM_EXIT_EXCEPTION: | |
641 | dprintf("kvm_exit_exception\n"); | |
642 | break; | |
643 | case KVM_EXIT_DEBUG: | |
644 | dprintf("kvm_exit_debug\n"); | |
e22a25c9 AL |
645 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
646 | if (kvm_arch_debug(&run->debug.arch)) { | |
647 | gdb_set_stop_cpu(env); | |
648 | vm_stop(EXCP_DEBUG); | |
649 | env->exception_index = EXCP_DEBUG; | |
650 | return 0; | |
651 | } | |
652 | /* re-enter, this exception was guest-internal */ | |
653 | ret = 1; | |
654 | #endif /* KVM_CAP_SET_GUEST_DEBUG */ | |
05330448 AL |
655 | break; |
656 | default: | |
657 | dprintf("kvm_arch_handle_exit\n"); | |
658 | ret = kvm_arch_handle_exit(env, run); | |
659 | break; | |
660 | } | |
661 | } while (ret > 0); | |
662 | ||
be214e6c AJ |
663 | if (env->exit_request) { |
664 | env->exit_request = 0; | |
becfc390 AL |
665 | env->exception_index = EXCP_INTERRUPT; |
666 | } | |
667 | ||
05330448 AL |
668 | return ret; |
669 | } | |
670 | ||
c227f099 AL |
671 | void kvm_set_phys_mem(target_phys_addr_t start_addr, |
672 | ram_addr_t size, | |
673 | ram_addr_t phys_offset) | |
05330448 AL |
674 | { |
675 | KVMState *s = kvm_state; | |
c227f099 | 676 | ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; |
6152e2ae AL |
677 | KVMSlot *mem, old; |
678 | int err; | |
05330448 | 679 | |
d3f8d37f | 680 | if (start_addr & ~TARGET_PAGE_MASK) { |
e6f4afe0 JK |
681 | if (flags >= IO_MEM_UNASSIGNED) { |
682 | if (!kvm_lookup_overlapping_slot(s, start_addr, | |
683 | start_addr + size)) { | |
684 | return; | |
685 | } | |
686 | fprintf(stderr, "Unaligned split of a KVM memory slot\n"); | |
687 | } else { | |
688 | fprintf(stderr, "Only page-aligned memory slots supported\n"); | |
689 | } | |
d3f8d37f AL |
690 | abort(); |
691 | } | |
692 | ||
05330448 AL |
693 | /* KVM does not support read-only slots */ |
694 | phys_offset &= ~IO_MEM_ROM; | |
695 | ||
6152e2ae AL |
696 | while (1) { |
697 | mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); | |
698 | if (!mem) { | |
699 | break; | |
700 | } | |
62d60e8c | 701 | |
6152e2ae AL |
702 | if (flags < IO_MEM_UNASSIGNED && start_addr >= mem->start_addr && |
703 | (start_addr + size <= mem->start_addr + mem->memory_size) && | |
704 | (phys_offset - start_addr == mem->phys_offset - mem->start_addr)) { | |
705 | /* The new slot fits into the existing one and comes with | |
706 | * identical parameters - nothing to be done. */ | |
05330448 | 707 | return; |
6152e2ae AL |
708 | } |
709 | ||
710 | old = *mem; | |
711 | ||
712 | /* unregister the overlapping slot */ | |
713 | mem->memory_size = 0; | |
714 | err = kvm_set_user_memory_region(s, mem); | |
715 | if (err) { | |
716 | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n", | |
717 | __func__, strerror(-err)); | |
62d60e8c AL |
718 | abort(); |
719 | } | |
6152e2ae AL |
720 | |
721 | /* Workaround for older KVM versions: we can't join slots, even not by | |
722 | * unregistering the previous ones and then registering the larger | |
723 | * slot. We have to maintain the existing fragmentation. Sigh. | |
724 | * | |
725 | * This workaround assumes that the new slot starts at the same | |
726 | * address as the first existing one. If not or if some overlapping | |
727 | * slot comes around later, we will fail (not seen in practice so far) | |
728 | * - and actually require a recent KVM version. */ | |
e69917e2 JK |
729 | if (s->broken_set_mem_region && |
730 | old.start_addr == start_addr && old.memory_size < size && | |
6152e2ae AL |
731 | flags < IO_MEM_UNASSIGNED) { |
732 | mem = kvm_alloc_slot(s); | |
733 | mem->memory_size = old.memory_size; | |
734 | mem->start_addr = old.start_addr; | |
735 | mem->phys_offset = old.phys_offset; | |
736 | mem->flags = 0; | |
737 | ||
738 | err = kvm_set_user_memory_region(s, mem); | |
739 | if (err) { | |
740 | fprintf(stderr, "%s: error updating slot: %s\n", __func__, | |
741 | strerror(-err)); | |
742 | abort(); | |
743 | } | |
744 | ||
745 | start_addr += old.memory_size; | |
746 | phys_offset += old.memory_size; | |
747 | size -= old.memory_size; | |
748 | continue; | |
749 | } | |
750 | ||
751 | /* register prefix slot */ | |
752 | if (old.start_addr < start_addr) { | |
753 | mem = kvm_alloc_slot(s); | |
754 | mem->memory_size = start_addr - old.start_addr; | |
755 | mem->start_addr = old.start_addr; | |
756 | mem->phys_offset = old.phys_offset; | |
757 | mem->flags = 0; | |
758 | ||
759 | err = kvm_set_user_memory_region(s, mem); | |
760 | if (err) { | |
761 | fprintf(stderr, "%s: error registering prefix slot: %s\n", | |
762 | __func__, strerror(-err)); | |
763 | abort(); | |
764 | } | |
765 | } | |
766 | ||
767 | /* register suffix slot */ | |
768 | if (old.start_addr + old.memory_size > start_addr + size) { | |
c227f099 | 769 | ram_addr_t size_delta; |
6152e2ae AL |
770 | |
771 | mem = kvm_alloc_slot(s); | |
772 | mem->start_addr = start_addr + size; | |
773 | size_delta = mem->start_addr - old.start_addr; | |
774 | mem->memory_size = old.memory_size - size_delta; | |
775 | mem->phys_offset = old.phys_offset + size_delta; | |
776 | mem->flags = 0; | |
777 | ||
778 | err = kvm_set_user_memory_region(s, mem); | |
779 | if (err) { | |
780 | fprintf(stderr, "%s: error registering suffix slot: %s\n", | |
781 | __func__, strerror(-err)); | |
782 | abort(); | |
783 | } | |
784 | } | |
05330448 | 785 | } |
6152e2ae AL |
786 | |
787 | /* in case the KVM bug workaround already "consumed" the new slot */ | |
788 | if (!size) | |
789 | return; | |
790 | ||
05330448 AL |
791 | /* KVM does not need to know about this memory */ |
792 | if (flags >= IO_MEM_UNASSIGNED) | |
793 | return; | |
794 | ||
795 | mem = kvm_alloc_slot(s); | |
796 | mem->memory_size = size; | |
34fc643f AL |
797 | mem->start_addr = start_addr; |
798 | mem->phys_offset = phys_offset; | |
05330448 AL |
799 | mem->flags = 0; |
800 | ||
6152e2ae AL |
801 | err = kvm_set_user_memory_region(s, mem); |
802 | if (err) { | |
803 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
804 | strerror(-err)); | |
805 | abort(); | |
806 | } | |
05330448 AL |
807 | } |
808 | ||
984b5181 | 809 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
810 | { |
811 | int ret; | |
984b5181 AL |
812 | void *arg; |
813 | va_list ap; | |
05330448 | 814 | |
984b5181 AL |
815 | va_start(ap, type); |
816 | arg = va_arg(ap, void *); | |
817 | va_end(ap); | |
818 | ||
819 | ret = ioctl(s->fd, type, arg); | |
05330448 AL |
820 | if (ret == -1) |
821 | ret = -errno; | |
822 | ||
823 | return ret; | |
824 | } | |
825 | ||
984b5181 | 826 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
827 | { |
828 | int ret; | |
984b5181 AL |
829 | void *arg; |
830 | va_list ap; | |
831 | ||
832 | va_start(ap, type); | |
833 | arg = va_arg(ap, void *); | |
834 | va_end(ap); | |
05330448 | 835 | |
984b5181 | 836 | ret = ioctl(s->vmfd, type, arg); |
05330448 AL |
837 | if (ret == -1) |
838 | ret = -errno; | |
839 | ||
840 | return ret; | |
841 | } | |
842 | ||
984b5181 | 843 | int kvm_vcpu_ioctl(CPUState *env, int type, ...) |
05330448 AL |
844 | { |
845 | int ret; | |
984b5181 AL |
846 | void *arg; |
847 | va_list ap; | |
848 | ||
849 | va_start(ap, type); | |
850 | arg = va_arg(ap, void *); | |
851 | va_end(ap); | |
05330448 | 852 | |
984b5181 | 853 | ret = ioctl(env->kvm_fd, type, arg); |
05330448 AL |
854 | if (ret == -1) |
855 | ret = -errno; | |
856 | ||
857 | return ret; | |
858 | } | |
bd322087 AL |
859 | |
860 | int kvm_has_sync_mmu(void) | |
861 | { | |
a9c11522 | 862 | #ifdef KVM_CAP_SYNC_MMU |
bd322087 AL |
863 | KVMState *s = kvm_state; |
864 | ||
ad7b8b33 AL |
865 | return kvm_check_extension(s, KVM_CAP_SYNC_MMU); |
866 | #else | |
bd322087 | 867 | return 0; |
ad7b8b33 | 868 | #endif |
bd322087 | 869 | } |
e22a25c9 | 870 | |
6f0437e8 JK |
871 | void kvm_setup_guest_memory(void *start, size_t size) |
872 | { | |
873 | if (!kvm_has_sync_mmu()) { | |
874 | #ifdef MADV_DONTFORK | |
875 | int ret = madvise(start, size, MADV_DONTFORK); | |
876 | ||
877 | if (ret) { | |
878 | perror("madvice"); | |
879 | exit(1); | |
880 | } | |
881 | #else | |
882 | fprintf(stderr, | |
883 | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n"); | |
884 | exit(1); | |
885 | #endif | |
886 | } | |
887 | } | |
888 | ||
e22a25c9 | 889 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
fc5d642f LC |
890 | static void on_vcpu(CPUState *env, void (*func)(void *data), void *data) |
891 | { | |
828566bc | 892 | #ifdef CONFIG_IOTHREAD |
fc5d642f LC |
893 | if (env == cpu_single_env) { |
894 | func(data); | |
895 | return; | |
896 | } | |
897 | abort(); | |
828566bc GC |
898 | #else |
899 | func(data); | |
900 | #endif | |
fc5d642f LC |
901 | } |
902 | ||
e22a25c9 AL |
903 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env, |
904 | target_ulong pc) | |
905 | { | |
906 | struct kvm_sw_breakpoint *bp; | |
907 | ||
72cf2d4f | 908 | QTAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { |
e22a25c9 AL |
909 | if (bp->pc == pc) |
910 | return bp; | |
911 | } | |
912 | return NULL; | |
913 | } | |
914 | ||
915 | int kvm_sw_breakpoints_active(CPUState *env) | |
916 | { | |
72cf2d4f | 917 | return !QTAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
918 | } |
919 | ||
452e4751 GC |
920 | struct kvm_set_guest_debug_data { |
921 | struct kvm_guest_debug dbg; | |
922 | CPUState *env; | |
923 | int err; | |
924 | }; | |
925 | ||
926 | static void kvm_invoke_set_guest_debug(void *data) | |
927 | { | |
928 | struct kvm_set_guest_debug_data *dbg_data = data; | |
b3807725 JK |
929 | CPUState *env = dbg_data->env; |
930 | ||
931 | if (env->kvm_state->regs_modified) { | |
932 | kvm_arch_put_registers(env); | |
933 | env->kvm_state->regs_modified = 0; | |
934 | } | |
935 | dbg_data->err = kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg); | |
452e4751 GC |
936 | } |
937 | ||
e22a25c9 AL |
938 | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
939 | { | |
452e4751 | 940 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 941 | |
452e4751 | 942 | data.dbg.control = 0; |
e22a25c9 | 943 | if (env->singlestep_enabled) |
452e4751 | 944 | data.dbg.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
e22a25c9 | 945 | |
452e4751 GC |
946 | kvm_arch_update_guest_debug(env, &data.dbg); |
947 | data.dbg.control |= reinject_trap; | |
948 | data.env = env; | |
e22a25c9 | 949 | |
452e4751 GC |
950 | on_vcpu(env, kvm_invoke_set_guest_debug, &data); |
951 | return data.err; | |
e22a25c9 AL |
952 | } |
953 | ||
954 | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr, | |
955 | target_ulong len, int type) | |
956 | { | |
957 | struct kvm_sw_breakpoint *bp; | |
958 | CPUState *env; | |
959 | int err; | |
960 | ||
961 | if (type == GDB_BREAKPOINT_SW) { | |
962 | bp = kvm_find_sw_breakpoint(current_env, addr); | |
963 | if (bp) { | |
964 | bp->use_count++; | |
965 | return 0; | |
966 | } | |
967 | ||
968 | bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint)); | |
969 | if (!bp) | |
970 | return -ENOMEM; | |
971 | ||
972 | bp->pc = addr; | |
973 | bp->use_count = 1; | |
974 | err = kvm_arch_insert_sw_breakpoint(current_env, bp); | |
975 | if (err) { | |
976 | free(bp); | |
977 | return err; | |
978 | } | |
979 | ||
72cf2d4f | 980 | QTAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, |
e22a25c9 AL |
981 | bp, entry); |
982 | } else { | |
983 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
984 | if (err) | |
985 | return err; | |
986 | } | |
987 | ||
988 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
989 | err = kvm_update_guest_debug(env, 0); | |
990 | if (err) | |
991 | return err; | |
992 | } | |
993 | return 0; | |
994 | } | |
995 | ||
996 | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr, | |
997 | target_ulong len, int type) | |
998 | { | |
999 | struct kvm_sw_breakpoint *bp; | |
1000 | CPUState *env; | |
1001 | int err; | |
1002 | ||
1003 | if (type == GDB_BREAKPOINT_SW) { | |
1004 | bp = kvm_find_sw_breakpoint(current_env, addr); | |
1005 | if (!bp) | |
1006 | return -ENOENT; | |
1007 | ||
1008 | if (bp->use_count > 1) { | |
1009 | bp->use_count--; | |
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | err = kvm_arch_remove_sw_breakpoint(current_env, bp); | |
1014 | if (err) | |
1015 | return err; | |
1016 | ||
72cf2d4f | 1017 | QTAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); |
e22a25c9 AL |
1018 | qemu_free(bp); |
1019 | } else { | |
1020 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
1021 | if (err) | |
1022 | return err; | |
1023 | } | |
1024 | ||
1025 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1026 | err = kvm_update_guest_debug(env, 0); | |
1027 | if (err) | |
1028 | return err; | |
1029 | } | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | void kvm_remove_all_breakpoints(CPUState *current_env) | |
1034 | { | |
1035 | struct kvm_sw_breakpoint *bp, *next; | |
1036 | KVMState *s = current_env->kvm_state; | |
1037 | CPUState *env; | |
1038 | ||
72cf2d4f | 1039 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
e22a25c9 AL |
1040 | if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { |
1041 | /* Try harder to find a CPU that currently sees the breakpoint. */ | |
1042 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1043 | if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) | |
1044 | break; | |
1045 | } | |
1046 | } | |
1047 | } | |
1048 | kvm_arch_remove_all_hw_breakpoints(); | |
1049 | ||
1050 | for (env = first_cpu; env != NULL; env = env->next_cpu) | |
1051 | kvm_update_guest_debug(env, 0); | |
1052 | } | |
1053 | ||
1054 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
1055 | ||
1056 | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) | |
1057 | { | |
1058 | return -EINVAL; | |
1059 | } | |
1060 | ||
1061 | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr, | |
1062 | target_ulong len, int type) | |
1063 | { | |
1064 | return -EINVAL; | |
1065 | } | |
1066 | ||
1067 | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr, | |
1068 | target_ulong len, int type) | |
1069 | { | |
1070 | return -EINVAL; | |
1071 | } | |
1072 | ||
1073 | void kvm_remove_all_breakpoints(CPUState *current_env) | |
1074 | { | |
1075 | } | |
1076 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ |