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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" | |
25 | #include "kvm.h" | |
26 | ||
f65ed4c1 AL |
27 | /* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */ |
28 | #define PAGE_SIZE TARGET_PAGE_SIZE | |
29 | ||
05330448 AL |
30 | //#define DEBUG_KVM |
31 | ||
32 | #ifdef DEBUG_KVM | |
33 | #define dprintf(fmt, ...) \ | |
34 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
35 | #else | |
36 | #define dprintf(fmt, ...) \ | |
37 | do { } while (0) | |
38 | #endif | |
39 | ||
34fc643f AL |
40 | typedef struct KVMSlot |
41 | { | |
42 | target_phys_addr_t start_addr; | |
43 | ram_addr_t memory_size; | |
44 | ram_addr_t phys_offset; | |
45 | int slot; | |
46 | int flags; | |
47 | } KVMSlot; | |
05330448 | 48 | |
5832d1f2 AL |
49 | typedef struct kvm_dirty_log KVMDirtyLog; |
50 | ||
05330448 AL |
51 | int kvm_allowed = 0; |
52 | ||
53 | struct KVMState | |
54 | { | |
55 | KVMSlot slots[32]; | |
56 | int fd; | |
57 | int vmfd; | |
f65ed4c1 | 58 | int coalesced_mmio; |
05330448 AL |
59 | }; |
60 | ||
61 | static KVMState *kvm_state; | |
62 | ||
63 | static KVMSlot *kvm_alloc_slot(KVMState *s) | |
64 | { | |
65 | int i; | |
66 | ||
67 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
62d60e8c AL |
68 | /* KVM private memory slots */ |
69 | if (i >= 8 && i < 12) | |
70 | continue; | |
05330448 AL |
71 | if (s->slots[i].memory_size == 0) |
72 | return &s->slots[i]; | |
73 | } | |
74 | ||
75 | return NULL; | |
76 | } | |
77 | ||
78 | static KVMSlot *kvm_lookup_slot(KVMState *s, target_phys_addr_t start_addr) | |
79 | { | |
80 | int i; | |
81 | ||
82 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
83 | KVMSlot *mem = &s->slots[i]; | |
84 | ||
34fc643f AL |
85 | if (start_addr >= mem->start_addr && |
86 | start_addr < (mem->start_addr + mem->memory_size)) | |
05330448 AL |
87 | return mem; |
88 | } | |
89 | ||
90 | return NULL; | |
91 | } | |
92 | ||
5832d1f2 AL |
93 | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
94 | { | |
95 | struct kvm_userspace_memory_region mem; | |
96 | ||
97 | mem.slot = slot->slot; | |
98 | mem.guest_phys_addr = slot->start_addr; | |
99 | mem.memory_size = slot->memory_size; | |
100 | mem.userspace_addr = (unsigned long)phys_ram_base + slot->phys_offset; | |
101 | mem.flags = slot->flags; | |
102 | ||
103 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
104 | } | |
105 | ||
106 | ||
05330448 AL |
107 | int kvm_init_vcpu(CPUState *env) |
108 | { | |
109 | KVMState *s = kvm_state; | |
110 | long mmap_size; | |
111 | int ret; | |
112 | ||
113 | dprintf("kvm_init_vcpu\n"); | |
114 | ||
984b5181 | 115 | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
05330448 AL |
116 | if (ret < 0) { |
117 | dprintf("kvm_create_vcpu failed\n"); | |
118 | goto err; | |
119 | } | |
120 | ||
121 | env->kvm_fd = ret; | |
122 | env->kvm_state = s; | |
123 | ||
124 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
125 | if (mmap_size < 0) { | |
126 | dprintf("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
127 | goto err; | |
128 | } | |
129 | ||
130 | env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
131 | env->kvm_fd, 0); | |
132 | if (env->kvm_run == MAP_FAILED) { | |
133 | ret = -errno; | |
134 | dprintf("mmap'ing vcpu state failed\n"); | |
135 | goto err; | |
136 | } | |
137 | ||
138 | ret = kvm_arch_init_vcpu(env); | |
139 | ||
140 | err: | |
141 | return ret; | |
142 | } | |
143 | ||
f5d6f51b AL |
144 | int kvm_sync_vcpus(void) |
145 | { | |
146 | CPUState *env; | |
147 | ||
148 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
149 | int ret; | |
150 | ||
151 | ret = kvm_arch_put_registers(env); | |
152 | if (ret) | |
153 | return ret; | |
154 | } | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
5832d1f2 AL |
159 | /* |
160 | * dirty pages logging control | |
161 | */ | |
162 | static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, target_phys_addr_t end_addr, | |
163 | unsigned flags, | |
164 | unsigned mask) | |
165 | { | |
166 | KVMState *s = kvm_state; | |
167 | KVMSlot *mem = kvm_lookup_slot(s, phys_addr); | |
168 | if (mem == NULL) { | |
169 | dprintf("invalid parameters %llx-%llx\n", phys_addr, end_addr); | |
170 | return -EINVAL; | |
171 | } | |
172 | ||
173 | flags = (mem->flags & ~mask) | flags; | |
174 | /* Nothing changed, no need to issue ioctl */ | |
175 | if (flags == mem->flags) | |
176 | return 0; | |
177 | ||
178 | mem->flags = flags; | |
179 | ||
180 | return kvm_set_user_memory_region(s, mem); | |
181 | } | |
182 | ||
183 | int kvm_log_start(target_phys_addr_t phys_addr, target_phys_addr_t end_addr) | |
184 | { | |
185 | return kvm_dirty_pages_log_change(phys_addr, end_addr, | |
186 | KVM_MEM_LOG_DIRTY_PAGES, | |
187 | KVM_MEM_LOG_DIRTY_PAGES); | |
188 | } | |
189 | ||
190 | int kvm_log_stop(target_phys_addr_t phys_addr, target_phys_addr_t end_addr) | |
191 | { | |
192 | return kvm_dirty_pages_log_change(phys_addr, end_addr, | |
193 | 0, | |
194 | KVM_MEM_LOG_DIRTY_PAGES); | |
195 | } | |
196 | ||
197 | /** | |
198 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
199 | * This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty(). | |
200 | * This means all bits are set to dirty. | |
201 | * | |
202 | * @start_add: start of logged region. This is what we use to search the memslot | |
203 | * @end_addr: end of logged region. | |
204 | */ | |
205 | void kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, target_phys_addr_t end_addr) | |
206 | { | |
207 | KVMState *s = kvm_state; | |
208 | KVMDirtyLog d; | |
209 | KVMSlot *mem = kvm_lookup_slot(s, start_addr); | |
210 | unsigned long alloc_size; | |
211 | ram_addr_t addr; | |
212 | target_phys_addr_t phys_addr = start_addr; | |
213 | ||
214 | dprintf("sync addr: %llx into %lx\n", start_addr, mem->phys_offset); | |
215 | if (mem == NULL) { | |
216 | fprintf(stderr, "BUG: %s: invalid parameters\n", __func__); | |
217 | return; | |
218 | } | |
219 | ||
220 | alloc_size = mem->memory_size >> TARGET_PAGE_BITS / sizeof(d.dirty_bitmap); | |
221 | d.dirty_bitmap = qemu_mallocz(alloc_size); | |
222 | ||
5832d1f2 AL |
223 | d.slot = mem->slot; |
224 | dprintf("slot %d, phys_addr %llx, uaddr: %llx\n", | |
225 | d.slot, mem->start_addr, mem->phys_offset); | |
226 | ||
227 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { | |
228 | dprintf("ioctl failed %d\n", errno); | |
229 | goto out; | |
230 | } | |
231 | ||
232 | phys_addr = start_addr; | |
233 | for (addr = mem->phys_offset; phys_addr < end_addr; phys_addr+= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { | |
234 | unsigned long *bitmap = (unsigned long *)d.dirty_bitmap; | |
235 | unsigned nr = (phys_addr - start_addr) >> TARGET_PAGE_BITS; | |
236 | unsigned word = nr / (sizeof(*bitmap) * 8); | |
237 | unsigned bit = nr % (sizeof(*bitmap) * 8); | |
238 | if ((bitmap[word] >> bit) & 1) | |
239 | cpu_physical_memory_set_dirty(addr); | |
240 | } | |
241 | out: | |
242 | qemu_free(d.dirty_bitmap); | |
243 | } | |
244 | ||
f65ed4c1 AL |
245 | int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) |
246 | { | |
247 | int ret = -ENOSYS; | |
248 | #ifdef KVM_CAP_COALESCED_MMIO | |
249 | KVMState *s = kvm_state; | |
250 | ||
251 | if (s->coalesced_mmio) { | |
252 | struct kvm_coalesced_mmio_zone zone; | |
253 | ||
254 | zone.addr = start; | |
255 | zone.size = size; | |
256 | ||
257 | ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
258 | } | |
259 | #endif | |
260 | ||
261 | return ret; | |
262 | } | |
263 | ||
264 | int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) | |
265 | { | |
266 | int ret = -ENOSYS; | |
267 | #ifdef KVM_CAP_COALESCED_MMIO | |
268 | KVMState *s = kvm_state; | |
269 | ||
270 | if (s->coalesced_mmio) { | |
271 | struct kvm_coalesced_mmio_zone zone; | |
272 | ||
273 | zone.addr = start; | |
274 | zone.size = size; | |
275 | ||
276 | ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
277 | } | |
278 | #endif | |
279 | ||
280 | return ret; | |
281 | } | |
282 | ||
05330448 AL |
283 | int kvm_init(int smp_cpus) |
284 | { | |
285 | KVMState *s; | |
286 | int ret; | |
287 | int i; | |
288 | ||
289 | if (smp_cpus > 1) | |
290 | return -EINVAL; | |
291 | ||
292 | s = qemu_mallocz(sizeof(KVMState)); | |
05330448 AL |
293 | |
294 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) | |
295 | s->slots[i].slot = i; | |
296 | ||
297 | s->vmfd = -1; | |
298 | s->fd = open("/dev/kvm", O_RDWR); | |
299 | if (s->fd == -1) { | |
300 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
301 | ret = -errno; | |
302 | goto err; | |
303 | } | |
304 | ||
305 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
306 | if (ret < KVM_API_VERSION) { | |
307 | if (ret > 0) | |
308 | ret = -EINVAL; | |
309 | fprintf(stderr, "kvm version too old\n"); | |
310 | goto err; | |
311 | } | |
312 | ||
313 | if (ret > KVM_API_VERSION) { | |
314 | ret = -EINVAL; | |
315 | fprintf(stderr, "kvm version not supported\n"); | |
316 | goto err; | |
317 | } | |
318 | ||
319 | s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0); | |
320 | if (s->vmfd < 0) | |
321 | goto err; | |
322 | ||
323 | /* initially, KVM allocated its own memory and we had to jump through | |
324 | * hooks to make phys_ram_base point to this. Modern versions of KVM | |
325 | * just use a user allocated buffer so we can use phys_ram_base | |
326 | * unmodified. Make sure we have a sufficiently modern version of KVM. | |
327 | */ | |
984b5181 | 328 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_USER_MEMORY); |
05330448 AL |
329 | if (ret <= 0) { |
330 | if (ret == 0) | |
331 | ret = -EINVAL; | |
332 | fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n"); | |
333 | goto err; | |
334 | } | |
335 | ||
d85dc283 AL |
336 | /* There was a nasty bug in < kvm-80 that prevents memory slots from being |
337 | * destroyed properly. Since we rely on this capability, refuse to work | |
338 | * with any kernel without this capability. */ | |
339 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, | |
340 | KVM_CAP_DESTROY_MEMORY_REGION_WORKS); | |
341 | if (ret <= 0) { | |
342 | if (ret == 0) | |
343 | ret = -EINVAL; | |
344 | ||
345 | fprintf(stderr, | |
346 | "KVM kernel module broken (DESTROY_MEMORY_REGION)\n" | |
347 | "Please upgrade to at least kvm-81.\n"); | |
348 | goto err; | |
349 | } | |
350 | ||
f65ed4c1 AL |
351 | s->coalesced_mmio = 0; |
352 | #ifdef KVM_CAP_COALESCED_MMIO | |
353 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_COALESCED_MMIO); | |
354 | if (ret > 0) | |
355 | s->coalesced_mmio = ret; | |
356 | #endif | |
357 | ||
05330448 AL |
358 | ret = kvm_arch_init(s, smp_cpus); |
359 | if (ret < 0) | |
360 | goto err; | |
361 | ||
362 | kvm_state = s; | |
363 | ||
364 | return 0; | |
365 | ||
366 | err: | |
367 | if (s) { | |
368 | if (s->vmfd != -1) | |
369 | close(s->vmfd); | |
370 | if (s->fd != -1) | |
371 | close(s->fd); | |
372 | } | |
373 | qemu_free(s); | |
374 | ||
375 | return ret; | |
376 | } | |
377 | ||
378 | static int kvm_handle_io(CPUState *env, uint16_t port, void *data, | |
379 | int direction, int size, uint32_t count) | |
380 | { | |
381 | int i; | |
382 | uint8_t *ptr = data; | |
383 | ||
384 | for (i = 0; i < count; i++) { | |
385 | if (direction == KVM_EXIT_IO_IN) { | |
386 | switch (size) { | |
387 | case 1: | |
388 | stb_p(ptr, cpu_inb(env, port)); | |
389 | break; | |
390 | case 2: | |
391 | stw_p(ptr, cpu_inw(env, port)); | |
392 | break; | |
393 | case 4: | |
394 | stl_p(ptr, cpu_inl(env, port)); | |
395 | break; | |
396 | } | |
397 | } else { | |
398 | switch (size) { | |
399 | case 1: | |
400 | cpu_outb(env, port, ldub_p(ptr)); | |
401 | break; | |
402 | case 2: | |
403 | cpu_outw(env, port, lduw_p(ptr)); | |
404 | break; | |
405 | case 4: | |
406 | cpu_outl(env, port, ldl_p(ptr)); | |
407 | break; | |
408 | } | |
409 | } | |
410 | ||
411 | ptr += size; | |
412 | } | |
413 | ||
414 | return 1; | |
415 | } | |
416 | ||
f65ed4c1 AL |
417 | static void kvm_run_coalesced_mmio(CPUState *env, struct kvm_run *run) |
418 | { | |
419 | #ifdef KVM_CAP_COALESCED_MMIO | |
420 | KVMState *s = kvm_state; | |
421 | if (s->coalesced_mmio) { | |
422 | struct kvm_coalesced_mmio_ring *ring; | |
423 | ||
424 | ring = (void *)run + (s->coalesced_mmio * TARGET_PAGE_SIZE); | |
425 | while (ring->first != ring->last) { | |
426 | struct kvm_coalesced_mmio *ent; | |
427 | ||
428 | ent = &ring->coalesced_mmio[ring->first]; | |
429 | ||
430 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
431 | /* FIXME smp_wmb() */ | |
432 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; | |
433 | } | |
434 | } | |
435 | #endif | |
436 | } | |
437 | ||
05330448 AL |
438 | int kvm_cpu_exec(CPUState *env) |
439 | { | |
440 | struct kvm_run *run = env->kvm_run; | |
441 | int ret; | |
442 | ||
443 | dprintf("kvm_cpu_exec()\n"); | |
444 | ||
445 | do { | |
446 | kvm_arch_pre_run(env, run); | |
447 | ||
448 | if ((env->interrupt_request & CPU_INTERRUPT_EXIT)) { | |
449 | dprintf("interrupt exit requested\n"); | |
450 | ret = 0; | |
451 | break; | |
452 | } | |
453 | ||
454 | ret = kvm_vcpu_ioctl(env, KVM_RUN, 0); | |
455 | kvm_arch_post_run(env, run); | |
456 | ||
457 | if (ret == -EINTR || ret == -EAGAIN) { | |
458 | dprintf("io window exit\n"); | |
459 | ret = 0; | |
460 | break; | |
461 | } | |
462 | ||
463 | if (ret < 0) { | |
464 | dprintf("kvm run failed %s\n", strerror(-ret)); | |
465 | abort(); | |
466 | } | |
467 | ||
f65ed4c1 AL |
468 | kvm_run_coalesced_mmio(env, run); |
469 | ||
05330448 AL |
470 | ret = 0; /* exit loop */ |
471 | switch (run->exit_reason) { | |
472 | case KVM_EXIT_IO: | |
473 | dprintf("handle_io\n"); | |
474 | ret = kvm_handle_io(env, run->io.port, | |
475 | (uint8_t *)run + run->io.data_offset, | |
476 | run->io.direction, | |
477 | run->io.size, | |
478 | run->io.count); | |
479 | break; | |
480 | case KVM_EXIT_MMIO: | |
481 | dprintf("handle_mmio\n"); | |
482 | cpu_physical_memory_rw(run->mmio.phys_addr, | |
483 | run->mmio.data, | |
484 | run->mmio.len, | |
485 | run->mmio.is_write); | |
486 | ret = 1; | |
487 | break; | |
488 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
489 | dprintf("irq_window_open\n"); | |
490 | break; | |
491 | case KVM_EXIT_SHUTDOWN: | |
492 | dprintf("shutdown\n"); | |
493 | qemu_system_reset_request(); | |
494 | ret = 1; | |
495 | break; | |
496 | case KVM_EXIT_UNKNOWN: | |
497 | dprintf("kvm_exit_unknown\n"); | |
498 | break; | |
499 | case KVM_EXIT_FAIL_ENTRY: | |
500 | dprintf("kvm_exit_fail_entry\n"); | |
501 | break; | |
502 | case KVM_EXIT_EXCEPTION: | |
503 | dprintf("kvm_exit_exception\n"); | |
504 | break; | |
505 | case KVM_EXIT_DEBUG: | |
506 | dprintf("kvm_exit_debug\n"); | |
507 | break; | |
508 | default: | |
509 | dprintf("kvm_arch_handle_exit\n"); | |
510 | ret = kvm_arch_handle_exit(env, run); | |
511 | break; | |
512 | } | |
513 | } while (ret > 0); | |
514 | ||
becfc390 AL |
515 | if ((env->interrupt_request & CPU_INTERRUPT_EXIT)) { |
516 | env->interrupt_request &= ~CPU_INTERRUPT_EXIT; | |
517 | env->exception_index = EXCP_INTERRUPT; | |
518 | } | |
519 | ||
05330448 AL |
520 | return ret; |
521 | } | |
522 | ||
523 | void kvm_set_phys_mem(target_phys_addr_t start_addr, | |
524 | ram_addr_t size, | |
525 | ram_addr_t phys_offset) | |
526 | { | |
527 | KVMState *s = kvm_state; | |
528 | ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; | |
529 | KVMSlot *mem; | |
530 | ||
531 | /* KVM does not support read-only slots */ | |
532 | phys_offset &= ~IO_MEM_ROM; | |
533 | ||
534 | mem = kvm_lookup_slot(s, start_addr); | |
535 | if (mem) { | |
a3d6841f | 536 | if ((flags == IO_MEM_UNASSIGNED) || (flags >= TLB_MMIO)) { |
05330448 | 537 | mem->memory_size = 0; |
34fc643f AL |
538 | mem->start_addr = start_addr; |
539 | mem->phys_offset = 0; | |
05330448 AL |
540 | mem->flags = 0; |
541 | ||
34fc643f AL |
542 | kvm_set_user_memory_region(s, mem); |
543 | } else if (start_addr >= mem->start_addr && | |
544 | (start_addr + size) <= (mem->start_addr + | |
62d60e8c AL |
545 | mem->memory_size)) { |
546 | KVMSlot slot; | |
547 | target_phys_addr_t mem_start; | |
548 | ram_addr_t mem_size, mem_offset; | |
549 | ||
550 | /* Not splitting */ | |
34fc643f AL |
551 | if ((phys_offset - (start_addr - mem->start_addr)) == |
552 | mem->phys_offset) | |
62d60e8c AL |
553 | return; |
554 | ||
555 | /* unregister whole slot */ | |
556 | memcpy(&slot, mem, sizeof(slot)); | |
557 | mem->memory_size = 0; | |
34fc643f | 558 | kvm_set_user_memory_region(s, mem); |
62d60e8c AL |
559 | |
560 | /* register prefix slot */ | |
34fc643f AL |
561 | mem_start = slot.start_addr; |
562 | mem_size = start_addr - slot.start_addr; | |
563 | mem_offset = slot.phys_offset; | |
62d60e8c AL |
564 | if (mem_size) |
565 | kvm_set_phys_mem(mem_start, mem_size, mem_offset); | |
566 | ||
567 | /* register new slot */ | |
568 | kvm_set_phys_mem(start_addr, size, phys_offset); | |
569 | ||
570 | /* register suffix slot */ | |
571 | mem_start = start_addr + size; | |
572 | mem_offset += mem_size + size; | |
573 | mem_size = slot.memory_size - mem_size - size; | |
574 | if (mem_size) | |
575 | kvm_set_phys_mem(mem_start, mem_size, mem_offset); | |
576 | ||
05330448 | 577 | return; |
62d60e8c AL |
578 | } else { |
579 | printf("Registering overlapping slot\n"); | |
580 | abort(); | |
581 | } | |
05330448 | 582 | } |
05330448 AL |
583 | /* KVM does not need to know about this memory */ |
584 | if (flags >= IO_MEM_UNASSIGNED) | |
585 | return; | |
586 | ||
587 | mem = kvm_alloc_slot(s); | |
588 | mem->memory_size = size; | |
34fc643f AL |
589 | mem->start_addr = start_addr; |
590 | mem->phys_offset = phys_offset; | |
05330448 AL |
591 | mem->flags = 0; |
592 | ||
34fc643f | 593 | kvm_set_user_memory_region(s, mem); |
05330448 AL |
594 | /* FIXME deal with errors */ |
595 | } | |
596 | ||
984b5181 | 597 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
598 | { |
599 | int ret; | |
984b5181 AL |
600 | void *arg; |
601 | va_list ap; | |
05330448 | 602 | |
984b5181 AL |
603 | va_start(ap, type); |
604 | arg = va_arg(ap, void *); | |
605 | va_end(ap); | |
606 | ||
607 | ret = ioctl(s->fd, type, arg); | |
05330448 AL |
608 | if (ret == -1) |
609 | ret = -errno; | |
610 | ||
611 | return ret; | |
612 | } | |
613 | ||
984b5181 | 614 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
615 | { |
616 | int ret; | |
984b5181 AL |
617 | void *arg; |
618 | va_list ap; | |
619 | ||
620 | va_start(ap, type); | |
621 | arg = va_arg(ap, void *); | |
622 | va_end(ap); | |
05330448 | 623 | |
984b5181 | 624 | ret = ioctl(s->vmfd, type, arg); |
05330448 AL |
625 | if (ret == -1) |
626 | ret = -errno; | |
627 | ||
628 | return ret; | |
629 | } | |
630 | ||
984b5181 | 631 | int kvm_vcpu_ioctl(CPUState *env, int type, ...) |
05330448 AL |
632 | { |
633 | int ret; | |
984b5181 AL |
634 | void *arg; |
635 | va_list ap; | |
636 | ||
637 | va_start(ap, type); | |
638 | arg = va_arg(ap, void *); | |
639 | va_end(ap); | |
05330448 | 640 | |
984b5181 | 641 | ret = ioctl(env->kvm_fd, type, arg); |
05330448 AL |
642 | if (ret == -1) |
643 | ret = -errno; | |
644 | ||
645 | return ret; | |
646 | } | |
bd322087 AL |
647 | |
648 | int kvm_has_sync_mmu(void) | |
649 | { | |
a9c11522 | 650 | #ifdef KVM_CAP_SYNC_MMU |
bd322087 AL |
651 | KVMState *s = kvm_state; |
652 | ||
bd322087 AL |
653 | if (kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_SYNC_MMU) > 0) |
654 | return 1; | |
655 | #endif | |
656 | ||
657 | return 0; | |
658 | } |