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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/atomic.h" | |
25 | #include "qemu/option.h" | |
26 | #include "qemu/config-file.h" | |
27 | #include "sysemu/sysemu.h" | |
28 | #include "sysemu/accel.h" | |
29 | #include "hw/hw.h" | |
30 | #include "hw/pci/msi.h" | |
31 | #include "hw/s390x/adapter.h" | |
32 | #include "exec/gdbstub.h" | |
33 | #include "sysemu/kvm.h" | |
34 | #include "qemu/bswap.h" | |
35 | #include "exec/memory.h" | |
36 | #include "exec/ram_addr.h" | |
37 | #include "exec/address-spaces.h" | |
38 | #include "qemu/event_notifier.h" | |
39 | #include "trace.h" | |
40 | ||
41 | #include "hw/boards.h" | |
42 | ||
43 | /* This check must be after config-host.h is included */ | |
44 | #ifdef CONFIG_EVENTFD | |
45 | #include <sys/eventfd.h> | |
46 | #endif | |
47 | ||
48 | /* KVM uses PAGE_SIZE in its definition of COALESCED_MMIO_MAX */ | |
49 | #define PAGE_SIZE TARGET_PAGE_SIZE | |
50 | ||
51 | //#define DEBUG_KVM | |
52 | ||
53 | #ifdef DEBUG_KVM | |
54 | #define DPRINTF(fmt, ...) \ | |
55 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
56 | #else | |
57 | #define DPRINTF(fmt, ...) \ | |
58 | do { } while (0) | |
59 | #endif | |
60 | ||
61 | #define KVM_MSI_HASHTAB_SIZE 256 | |
62 | ||
63 | typedef struct KVMSlot | |
64 | { | |
65 | hwaddr start_addr; | |
66 | ram_addr_t memory_size; | |
67 | void *ram; | |
68 | int slot; | |
69 | int flags; | |
70 | } KVMSlot; | |
71 | ||
72 | typedef struct kvm_dirty_log KVMDirtyLog; | |
73 | ||
74 | struct KVMState | |
75 | { | |
76 | AccelState parent_obj; | |
77 | ||
78 | KVMSlot *slots; | |
79 | int nr_slots; | |
80 | int fd; | |
81 | int vmfd; | |
82 | int coalesced_mmio; | |
83 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; | |
84 | bool coalesced_flush_in_progress; | |
85 | int broken_set_mem_region; | |
86 | int migration_log; | |
87 | int vcpu_events; | |
88 | int robust_singlestep; | |
89 | int debugregs; | |
90 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
91 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; | |
92 | #endif | |
93 | int pit_state2; | |
94 | int xsave, xcrs; | |
95 | int many_ioeventfds; | |
96 | int intx_set_mask; | |
97 | /* The man page (and posix) say ioctl numbers are signed int, but | |
98 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
99 | * unsigned, and treating them as signed here can break things */ | |
100 | unsigned irq_set_ioctl; | |
101 | unsigned int sigmask_len; | |
102 | #ifdef KVM_CAP_IRQ_ROUTING | |
103 | struct kvm_irq_routing *irq_routes; | |
104 | int nr_allocated_irq_routes; | |
105 | uint32_t *used_gsi_bitmap; | |
106 | unsigned int gsi_count; | |
107 | QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; | |
108 | bool direct_msi; | |
109 | #endif | |
110 | }; | |
111 | ||
112 | #define TYPE_KVM_ACCEL ACCEL_CLASS_NAME("kvm") | |
113 | ||
114 | #define KVM_STATE(obj) \ | |
115 | OBJECT_CHECK(KVMState, (obj), TYPE_KVM_ACCEL) | |
116 | ||
117 | KVMState *kvm_state; | |
118 | bool kvm_kernel_irqchip; | |
119 | bool kvm_async_interrupts_allowed; | |
120 | bool kvm_halt_in_kernel_allowed; | |
121 | bool kvm_eventfds_allowed; | |
122 | bool kvm_irqfds_allowed; | |
123 | bool kvm_msi_via_irqfd_allowed; | |
124 | bool kvm_gsi_routing_allowed; | |
125 | bool kvm_gsi_direct_mapping; | |
126 | bool kvm_allowed; | |
127 | bool kvm_readonly_mem_allowed; | |
128 | ||
129 | static const KVMCapabilityInfo kvm_required_capabilites[] = { | |
130 | KVM_CAP_INFO(USER_MEMORY), | |
131 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
132 | KVM_CAP_LAST_INFO | |
133 | }; | |
134 | ||
135 | static KVMSlot *kvm_get_free_slot(KVMState *s) | |
136 | { | |
137 | int i; | |
138 | ||
139 | for (i = 0; i < s->nr_slots; i++) { | |
140 | if (s->slots[i].memory_size == 0) { | |
141 | return &s->slots[i]; | |
142 | } | |
143 | } | |
144 | ||
145 | return NULL; | |
146 | } | |
147 | ||
148 | bool kvm_has_free_slot(MachineState *ms) | |
149 | { | |
150 | return kvm_get_free_slot(KVM_STATE(ms->accelerator)); | |
151 | } | |
152 | ||
153 | static KVMSlot *kvm_alloc_slot(KVMState *s) | |
154 | { | |
155 | KVMSlot *slot = kvm_get_free_slot(s); | |
156 | ||
157 | if (slot) { | |
158 | return slot; | |
159 | } | |
160 | ||
161 | fprintf(stderr, "%s: no free slot available\n", __func__); | |
162 | abort(); | |
163 | } | |
164 | ||
165 | static KVMSlot *kvm_lookup_matching_slot(KVMState *s, | |
166 | hwaddr start_addr, | |
167 | hwaddr end_addr) | |
168 | { | |
169 | int i; | |
170 | ||
171 | for (i = 0; i < s->nr_slots; i++) { | |
172 | KVMSlot *mem = &s->slots[i]; | |
173 | ||
174 | if (start_addr == mem->start_addr && | |
175 | end_addr == mem->start_addr + mem->memory_size) { | |
176 | return mem; | |
177 | } | |
178 | } | |
179 | ||
180 | return NULL; | |
181 | } | |
182 | ||
183 | /* | |
184 | * Find overlapping slot with lowest start address | |
185 | */ | |
186 | static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s, | |
187 | hwaddr start_addr, | |
188 | hwaddr end_addr) | |
189 | { | |
190 | KVMSlot *found = NULL; | |
191 | int i; | |
192 | ||
193 | for (i = 0; i < s->nr_slots; i++) { | |
194 | KVMSlot *mem = &s->slots[i]; | |
195 | ||
196 | if (mem->memory_size == 0 || | |
197 | (found && found->start_addr < mem->start_addr)) { | |
198 | continue; | |
199 | } | |
200 | ||
201 | if (end_addr > mem->start_addr && | |
202 | start_addr < mem->start_addr + mem->memory_size) { | |
203 | found = mem; | |
204 | } | |
205 | } | |
206 | ||
207 | return found; | |
208 | } | |
209 | ||
210 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, | |
211 | hwaddr *phys_addr) | |
212 | { | |
213 | int i; | |
214 | ||
215 | for (i = 0; i < s->nr_slots; i++) { | |
216 | KVMSlot *mem = &s->slots[i]; | |
217 | ||
218 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { | |
219 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
220 | return 1; | |
221 | } | |
222 | } | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) | |
228 | { | |
229 | struct kvm_userspace_memory_region mem; | |
230 | ||
231 | mem.slot = slot->slot; | |
232 | mem.guest_phys_addr = slot->start_addr; | |
233 | mem.userspace_addr = (unsigned long)slot->ram; | |
234 | mem.flags = slot->flags; | |
235 | if (s->migration_log) { | |
236 | mem.flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
237 | } | |
238 | ||
239 | if (slot->memory_size && mem.flags & KVM_MEM_READONLY) { | |
240 | /* Set the slot size to 0 before setting the slot to the desired | |
241 | * value. This is needed based on KVM commit 75d61fbc. */ | |
242 | mem.memory_size = 0; | |
243 | kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
244 | } | |
245 | mem.memory_size = slot->memory_size; | |
246 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
247 | } | |
248 | ||
249 | int kvm_init_vcpu(CPUState *cpu) | |
250 | { | |
251 | KVMState *s = kvm_state; | |
252 | long mmap_size; | |
253 | int ret; | |
254 | ||
255 | DPRINTF("kvm_init_vcpu\n"); | |
256 | ||
257 | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)kvm_arch_vcpu_id(cpu)); | |
258 | if (ret < 0) { | |
259 | DPRINTF("kvm_create_vcpu failed\n"); | |
260 | goto err; | |
261 | } | |
262 | ||
263 | cpu->kvm_fd = ret; | |
264 | cpu->kvm_state = s; | |
265 | cpu->kvm_vcpu_dirty = true; | |
266 | ||
267 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
268 | if (mmap_size < 0) { | |
269 | ret = mmap_size; | |
270 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
271 | goto err; | |
272 | } | |
273 | ||
274 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
275 | cpu->kvm_fd, 0); | |
276 | if (cpu->kvm_run == MAP_FAILED) { | |
277 | ret = -errno; | |
278 | DPRINTF("mmap'ing vcpu state failed\n"); | |
279 | goto err; | |
280 | } | |
281 | ||
282 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { | |
283 | s->coalesced_mmio_ring = | |
284 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; | |
285 | } | |
286 | ||
287 | ret = kvm_arch_init_vcpu(cpu); | |
288 | err: | |
289 | return ret; | |
290 | } | |
291 | ||
292 | /* | |
293 | * dirty pages logging control | |
294 | */ | |
295 | ||
296 | static int kvm_mem_flags(KVMState *s, bool log_dirty, bool readonly) | |
297 | { | |
298 | int flags = 0; | |
299 | flags = log_dirty ? KVM_MEM_LOG_DIRTY_PAGES : 0; | |
300 | if (readonly && kvm_readonly_mem_allowed) { | |
301 | flags |= KVM_MEM_READONLY; | |
302 | } | |
303 | return flags; | |
304 | } | |
305 | ||
306 | static int kvm_slot_dirty_pages_log_change(KVMSlot *mem, bool log_dirty) | |
307 | { | |
308 | KVMState *s = kvm_state; | |
309 | int flags, mask = KVM_MEM_LOG_DIRTY_PAGES; | |
310 | int old_flags; | |
311 | ||
312 | old_flags = mem->flags; | |
313 | ||
314 | flags = (mem->flags & ~mask) | kvm_mem_flags(s, log_dirty, false); | |
315 | mem->flags = flags; | |
316 | ||
317 | /* If nothing changed effectively, no need to issue ioctl */ | |
318 | if (s->migration_log) { | |
319 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
320 | } | |
321 | ||
322 | if (flags == old_flags) { | |
323 | return 0; | |
324 | } | |
325 | ||
326 | return kvm_set_user_memory_region(s, mem); | |
327 | } | |
328 | ||
329 | static int kvm_dirty_pages_log_change(hwaddr phys_addr, | |
330 | ram_addr_t size, bool log_dirty) | |
331 | { | |
332 | KVMState *s = kvm_state; | |
333 | KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); | |
334 | ||
335 | if (mem == NULL) { | |
336 | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" | |
337 | TARGET_FMT_plx "\n", __func__, phys_addr, | |
338 | (hwaddr)(phys_addr + size - 1)); | |
339 | return -EINVAL; | |
340 | } | |
341 | return kvm_slot_dirty_pages_log_change(mem, log_dirty); | |
342 | } | |
343 | ||
344 | static void kvm_log_start(MemoryListener *listener, | |
345 | MemoryRegionSection *section) | |
346 | { | |
347 | int r; | |
348 | ||
349 | r = kvm_dirty_pages_log_change(section->offset_within_address_space, | |
350 | int128_get64(section->size), true); | |
351 | if (r < 0) { | |
352 | abort(); | |
353 | } | |
354 | } | |
355 | ||
356 | static void kvm_log_stop(MemoryListener *listener, | |
357 | MemoryRegionSection *section) | |
358 | { | |
359 | int r; | |
360 | ||
361 | r = kvm_dirty_pages_log_change(section->offset_within_address_space, | |
362 | int128_get64(section->size), false); | |
363 | if (r < 0) { | |
364 | abort(); | |
365 | } | |
366 | } | |
367 | ||
368 | static int kvm_set_migration_log(int enable) | |
369 | { | |
370 | KVMState *s = kvm_state; | |
371 | KVMSlot *mem; | |
372 | int i, err; | |
373 | ||
374 | s->migration_log = enable; | |
375 | ||
376 | for (i = 0; i < s->nr_slots; i++) { | |
377 | mem = &s->slots[i]; | |
378 | ||
379 | if (!mem->memory_size) { | |
380 | continue; | |
381 | } | |
382 | if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) { | |
383 | continue; | |
384 | } | |
385 | err = kvm_set_user_memory_region(s, mem); | |
386 | if (err) { | |
387 | return err; | |
388 | } | |
389 | } | |
390 | return 0; | |
391 | } | |
392 | ||
393 | /* get kvm's dirty pages bitmap and update qemu's */ | |
394 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, | |
395 | unsigned long *bitmap) | |
396 | { | |
397 | ram_addr_t start = section->offset_within_region + section->mr->ram_addr; | |
398 | ram_addr_t pages = int128_get64(section->size) / getpagesize(); | |
399 | ||
400 | cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); | |
401 | return 0; | |
402 | } | |
403 | ||
404 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) | |
405 | ||
406 | /** | |
407 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
408 | * This function updates qemu's dirty bitmap using | |
409 | * memory_region_set_dirty(). This means all bits are set | |
410 | * to dirty. | |
411 | * | |
412 | * @start_add: start of logged region. | |
413 | * @end_addr: end of logged region. | |
414 | */ | |
415 | static int kvm_physical_sync_dirty_bitmap(MemoryRegionSection *section) | |
416 | { | |
417 | KVMState *s = kvm_state; | |
418 | unsigned long size, allocated_size = 0; | |
419 | KVMDirtyLog d; | |
420 | KVMSlot *mem; | |
421 | int ret = 0; | |
422 | hwaddr start_addr = section->offset_within_address_space; | |
423 | hwaddr end_addr = start_addr + int128_get64(section->size); | |
424 | ||
425 | d.dirty_bitmap = NULL; | |
426 | while (start_addr < end_addr) { | |
427 | mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); | |
428 | if (mem == NULL) { | |
429 | break; | |
430 | } | |
431 | ||
432 | /* XXX bad kernel interface alert | |
433 | * For dirty bitmap, kernel allocates array of size aligned to | |
434 | * bits-per-long. But for case when the kernel is 64bits and | |
435 | * the userspace is 32bits, userspace can't align to the same | |
436 | * bits-per-long, since sizeof(long) is different between kernel | |
437 | * and user space. This way, userspace will provide buffer which | |
438 | * may be 4 bytes less than the kernel will use, resulting in | |
439 | * userspace memory corruption (which is not detectable by valgrind | |
440 | * too, in most cases). | |
441 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
442 | * a hope that sizeof(long) wont become >8 any time soon. | |
443 | */ | |
444 | size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
445 | /*HOST_LONG_BITS*/ 64) / 8; | |
446 | if (!d.dirty_bitmap) { | |
447 | d.dirty_bitmap = g_malloc(size); | |
448 | } else if (size > allocated_size) { | |
449 | d.dirty_bitmap = g_realloc(d.dirty_bitmap, size); | |
450 | } | |
451 | allocated_size = size; | |
452 | memset(d.dirty_bitmap, 0, allocated_size); | |
453 | ||
454 | d.slot = mem->slot; | |
455 | ||
456 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { | |
457 | DPRINTF("ioctl failed %d\n", errno); | |
458 | ret = -1; | |
459 | break; | |
460 | } | |
461 | ||
462 | kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); | |
463 | start_addr = mem->start_addr + mem->memory_size; | |
464 | } | |
465 | g_free(d.dirty_bitmap); | |
466 | ||
467 | return ret; | |
468 | } | |
469 | ||
470 | static void kvm_coalesce_mmio_region(MemoryListener *listener, | |
471 | MemoryRegionSection *secion, | |
472 | hwaddr start, hwaddr size) | |
473 | { | |
474 | KVMState *s = kvm_state; | |
475 | ||
476 | if (s->coalesced_mmio) { | |
477 | struct kvm_coalesced_mmio_zone zone; | |
478 | ||
479 | zone.addr = start; | |
480 | zone.size = size; | |
481 | zone.pad = 0; | |
482 | ||
483 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
484 | } | |
485 | } | |
486 | ||
487 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, | |
488 | MemoryRegionSection *secion, | |
489 | hwaddr start, hwaddr size) | |
490 | { | |
491 | KVMState *s = kvm_state; | |
492 | ||
493 | if (s->coalesced_mmio) { | |
494 | struct kvm_coalesced_mmio_zone zone; | |
495 | ||
496 | zone.addr = start; | |
497 | zone.size = size; | |
498 | zone.pad = 0; | |
499 | ||
500 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
501 | } | |
502 | } | |
503 | ||
504 | int kvm_check_extension(KVMState *s, unsigned int extension) | |
505 | { | |
506 | int ret; | |
507 | ||
508 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
509 | if (ret < 0) { | |
510 | ret = 0; | |
511 | } | |
512 | ||
513 | return ret; | |
514 | } | |
515 | ||
516 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) | |
517 | { | |
518 | int ret; | |
519 | ||
520 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
521 | if (ret < 0) { | |
522 | /* VM wide version not implemented, use global one instead */ | |
523 | ret = kvm_check_extension(s, extension); | |
524 | } | |
525 | ||
526 | return ret; | |
527 | } | |
528 | ||
529 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, | |
530 | bool assign, uint32_t size, bool datamatch) | |
531 | { | |
532 | int ret; | |
533 | struct kvm_ioeventfd iofd; | |
534 | ||
535 | iofd.datamatch = datamatch ? val : 0; | |
536 | iofd.addr = addr; | |
537 | iofd.len = size; | |
538 | iofd.flags = 0; | |
539 | iofd.fd = fd; | |
540 | ||
541 | if (!kvm_enabled()) { | |
542 | return -ENOSYS; | |
543 | } | |
544 | ||
545 | if (datamatch) { | |
546 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
547 | } | |
548 | if (!assign) { | |
549 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
550 | } | |
551 | ||
552 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
553 | ||
554 | if (ret < 0) { | |
555 | return -errno; | |
556 | } | |
557 | ||
558 | return 0; | |
559 | } | |
560 | ||
561 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, | |
562 | bool assign, uint32_t size, bool datamatch) | |
563 | { | |
564 | struct kvm_ioeventfd kick = { | |
565 | .datamatch = datamatch ? val : 0, | |
566 | .addr = addr, | |
567 | .flags = KVM_IOEVENTFD_FLAG_PIO, | |
568 | .len = size, | |
569 | .fd = fd, | |
570 | }; | |
571 | int r; | |
572 | if (!kvm_enabled()) { | |
573 | return -ENOSYS; | |
574 | } | |
575 | if (datamatch) { | |
576 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
577 | } | |
578 | if (!assign) { | |
579 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
580 | } | |
581 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
582 | if (r < 0) { | |
583 | return r; | |
584 | } | |
585 | return 0; | |
586 | } | |
587 | ||
588 | ||
589 | static int kvm_check_many_ioeventfds(void) | |
590 | { | |
591 | /* Userspace can use ioeventfd for io notification. This requires a host | |
592 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
593 | * support SIGIO it cannot interrupt the vcpu. | |
594 | * | |
595 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
596 | * can avoid creating too many ioeventfds. | |
597 | */ | |
598 | #if defined(CONFIG_EVENTFD) | |
599 | int ioeventfds[7]; | |
600 | int i, ret = 0; | |
601 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
602 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
603 | if (ioeventfds[i] < 0) { | |
604 | break; | |
605 | } | |
606 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); | |
607 | if (ret < 0) { | |
608 | close(ioeventfds[i]); | |
609 | break; | |
610 | } | |
611 | } | |
612 | ||
613 | /* Decide whether many devices are supported or not */ | |
614 | ret = i == ARRAY_SIZE(ioeventfds); | |
615 | ||
616 | while (i-- > 0) { | |
617 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); | |
618 | close(ioeventfds[i]); | |
619 | } | |
620 | return ret; | |
621 | #else | |
622 | return 0; | |
623 | #endif | |
624 | } | |
625 | ||
626 | static const KVMCapabilityInfo * | |
627 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
628 | { | |
629 | while (list->name) { | |
630 | if (!kvm_check_extension(s, list->value)) { | |
631 | return list; | |
632 | } | |
633 | list++; | |
634 | } | |
635 | return NULL; | |
636 | } | |
637 | ||
638 | static void kvm_set_phys_mem(MemoryRegionSection *section, bool add) | |
639 | { | |
640 | KVMState *s = kvm_state; | |
641 | KVMSlot *mem, old; | |
642 | int err; | |
643 | MemoryRegion *mr = section->mr; | |
644 | bool log_dirty = memory_region_is_logging(mr); | |
645 | bool writeable = !mr->readonly && !mr->rom_device; | |
646 | bool readonly_flag = mr->readonly || memory_region_is_romd(mr); | |
647 | hwaddr start_addr = section->offset_within_address_space; | |
648 | ram_addr_t size = int128_get64(section->size); | |
649 | void *ram = NULL; | |
650 | unsigned delta; | |
651 | ||
652 | /* kvm works in page size chunks, but the function may be called | |
653 | with sub-page size and unaligned start address. Pad the start | |
654 | address to next and truncate size to previous page boundary. */ | |
655 | delta = (TARGET_PAGE_SIZE - (start_addr & ~TARGET_PAGE_MASK)); | |
656 | delta &= ~TARGET_PAGE_MASK; | |
657 | if (delta > size) { | |
658 | return; | |
659 | } | |
660 | start_addr += delta; | |
661 | size -= delta; | |
662 | size &= TARGET_PAGE_MASK; | |
663 | if (!size || (start_addr & ~TARGET_PAGE_MASK)) { | |
664 | return; | |
665 | } | |
666 | ||
667 | if (!memory_region_is_ram(mr)) { | |
668 | if (writeable || !kvm_readonly_mem_allowed) { | |
669 | return; | |
670 | } else if (!mr->romd_mode) { | |
671 | /* If the memory device is not in romd_mode, then we actually want | |
672 | * to remove the kvm memory slot so all accesses will trap. */ | |
673 | add = false; | |
674 | } | |
675 | } | |
676 | ||
677 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta; | |
678 | ||
679 | while (1) { | |
680 | mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); | |
681 | if (!mem) { | |
682 | break; | |
683 | } | |
684 | ||
685 | if (add && start_addr >= mem->start_addr && | |
686 | (start_addr + size <= mem->start_addr + mem->memory_size) && | |
687 | (ram - start_addr == mem->ram - mem->start_addr)) { | |
688 | /* The new slot fits into the existing one and comes with | |
689 | * identical parameters - update flags and done. */ | |
690 | kvm_slot_dirty_pages_log_change(mem, log_dirty); | |
691 | return; | |
692 | } | |
693 | ||
694 | old = *mem; | |
695 | ||
696 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
697 | kvm_physical_sync_dirty_bitmap(section); | |
698 | } | |
699 | ||
700 | /* unregister the overlapping slot */ | |
701 | mem->memory_size = 0; | |
702 | err = kvm_set_user_memory_region(s, mem); | |
703 | if (err) { | |
704 | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n", | |
705 | __func__, strerror(-err)); | |
706 | abort(); | |
707 | } | |
708 | ||
709 | /* Workaround for older KVM versions: we can't join slots, even not by | |
710 | * unregistering the previous ones and then registering the larger | |
711 | * slot. We have to maintain the existing fragmentation. Sigh. | |
712 | * | |
713 | * This workaround assumes that the new slot starts at the same | |
714 | * address as the first existing one. If not or if some overlapping | |
715 | * slot comes around later, we will fail (not seen in practice so far) | |
716 | * - and actually require a recent KVM version. */ | |
717 | if (s->broken_set_mem_region && | |
718 | old.start_addr == start_addr && old.memory_size < size && add) { | |
719 | mem = kvm_alloc_slot(s); | |
720 | mem->memory_size = old.memory_size; | |
721 | mem->start_addr = old.start_addr; | |
722 | mem->ram = old.ram; | |
723 | mem->flags = kvm_mem_flags(s, log_dirty, readonly_flag); | |
724 | ||
725 | err = kvm_set_user_memory_region(s, mem); | |
726 | if (err) { | |
727 | fprintf(stderr, "%s: error updating slot: %s\n", __func__, | |
728 | strerror(-err)); | |
729 | abort(); | |
730 | } | |
731 | ||
732 | start_addr += old.memory_size; | |
733 | ram += old.memory_size; | |
734 | size -= old.memory_size; | |
735 | continue; | |
736 | } | |
737 | ||
738 | /* register prefix slot */ | |
739 | if (old.start_addr < start_addr) { | |
740 | mem = kvm_alloc_slot(s); | |
741 | mem->memory_size = start_addr - old.start_addr; | |
742 | mem->start_addr = old.start_addr; | |
743 | mem->ram = old.ram; | |
744 | mem->flags = kvm_mem_flags(s, log_dirty, readonly_flag); | |
745 | ||
746 | err = kvm_set_user_memory_region(s, mem); | |
747 | if (err) { | |
748 | fprintf(stderr, "%s: error registering prefix slot: %s\n", | |
749 | __func__, strerror(-err)); | |
750 | #ifdef TARGET_PPC | |
751 | fprintf(stderr, "%s: This is probably because your kernel's " \ | |
752 | "PAGE_SIZE is too big. Please try to use 4k " \ | |
753 | "PAGE_SIZE!\n", __func__); | |
754 | #endif | |
755 | abort(); | |
756 | } | |
757 | } | |
758 | ||
759 | /* register suffix slot */ | |
760 | if (old.start_addr + old.memory_size > start_addr + size) { | |
761 | ram_addr_t size_delta; | |
762 | ||
763 | mem = kvm_alloc_slot(s); | |
764 | mem->start_addr = start_addr + size; | |
765 | size_delta = mem->start_addr - old.start_addr; | |
766 | mem->memory_size = old.memory_size - size_delta; | |
767 | mem->ram = old.ram + size_delta; | |
768 | mem->flags = kvm_mem_flags(s, log_dirty, readonly_flag); | |
769 | ||
770 | err = kvm_set_user_memory_region(s, mem); | |
771 | if (err) { | |
772 | fprintf(stderr, "%s: error registering suffix slot: %s\n", | |
773 | __func__, strerror(-err)); | |
774 | abort(); | |
775 | } | |
776 | } | |
777 | } | |
778 | ||
779 | /* in case the KVM bug workaround already "consumed" the new slot */ | |
780 | if (!size) { | |
781 | return; | |
782 | } | |
783 | if (!add) { | |
784 | return; | |
785 | } | |
786 | mem = kvm_alloc_slot(s); | |
787 | mem->memory_size = size; | |
788 | mem->start_addr = start_addr; | |
789 | mem->ram = ram; | |
790 | mem->flags = kvm_mem_flags(s, log_dirty, readonly_flag); | |
791 | ||
792 | err = kvm_set_user_memory_region(s, mem); | |
793 | if (err) { | |
794 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
795 | strerror(-err)); | |
796 | abort(); | |
797 | } | |
798 | } | |
799 | ||
800 | static void kvm_region_add(MemoryListener *listener, | |
801 | MemoryRegionSection *section) | |
802 | { | |
803 | memory_region_ref(section->mr); | |
804 | kvm_set_phys_mem(section, true); | |
805 | } | |
806 | ||
807 | static void kvm_region_del(MemoryListener *listener, | |
808 | MemoryRegionSection *section) | |
809 | { | |
810 | kvm_set_phys_mem(section, false); | |
811 | memory_region_unref(section->mr); | |
812 | } | |
813 | ||
814 | static void kvm_log_sync(MemoryListener *listener, | |
815 | MemoryRegionSection *section) | |
816 | { | |
817 | int r; | |
818 | ||
819 | r = kvm_physical_sync_dirty_bitmap(section); | |
820 | if (r < 0) { | |
821 | abort(); | |
822 | } | |
823 | } | |
824 | ||
825 | static void kvm_log_global_start(struct MemoryListener *listener) | |
826 | { | |
827 | int r; | |
828 | ||
829 | r = kvm_set_migration_log(1); | |
830 | assert(r >= 0); | |
831 | } | |
832 | ||
833 | static void kvm_log_global_stop(struct MemoryListener *listener) | |
834 | { | |
835 | int r; | |
836 | ||
837 | r = kvm_set_migration_log(0); | |
838 | assert(r >= 0); | |
839 | } | |
840 | ||
841 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, | |
842 | MemoryRegionSection *section, | |
843 | bool match_data, uint64_t data, | |
844 | EventNotifier *e) | |
845 | { | |
846 | int fd = event_notifier_get_fd(e); | |
847 | int r; | |
848 | ||
849 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, | |
850 | data, true, int128_get64(section->size), | |
851 | match_data); | |
852 | if (r < 0) { | |
853 | fprintf(stderr, "%s: error adding ioeventfd: %s\n", | |
854 | __func__, strerror(-r)); | |
855 | abort(); | |
856 | } | |
857 | } | |
858 | ||
859 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, | |
860 | MemoryRegionSection *section, | |
861 | bool match_data, uint64_t data, | |
862 | EventNotifier *e) | |
863 | { | |
864 | int fd = event_notifier_get_fd(e); | |
865 | int r; | |
866 | ||
867 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, | |
868 | data, false, int128_get64(section->size), | |
869 | match_data); | |
870 | if (r < 0) { | |
871 | abort(); | |
872 | } | |
873 | } | |
874 | ||
875 | static void kvm_io_ioeventfd_add(MemoryListener *listener, | |
876 | MemoryRegionSection *section, | |
877 | bool match_data, uint64_t data, | |
878 | EventNotifier *e) | |
879 | { | |
880 | int fd = event_notifier_get_fd(e); | |
881 | int r; | |
882 | ||
883 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, | |
884 | data, true, int128_get64(section->size), | |
885 | match_data); | |
886 | if (r < 0) { | |
887 | fprintf(stderr, "%s: error adding ioeventfd: %s\n", | |
888 | __func__, strerror(-r)); | |
889 | abort(); | |
890 | } | |
891 | } | |
892 | ||
893 | static void kvm_io_ioeventfd_del(MemoryListener *listener, | |
894 | MemoryRegionSection *section, | |
895 | bool match_data, uint64_t data, | |
896 | EventNotifier *e) | |
897 | ||
898 | { | |
899 | int fd = event_notifier_get_fd(e); | |
900 | int r; | |
901 | ||
902 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, | |
903 | data, false, int128_get64(section->size), | |
904 | match_data); | |
905 | if (r < 0) { | |
906 | abort(); | |
907 | } | |
908 | } | |
909 | ||
910 | static MemoryListener kvm_memory_listener = { | |
911 | .region_add = kvm_region_add, | |
912 | .region_del = kvm_region_del, | |
913 | .log_start = kvm_log_start, | |
914 | .log_stop = kvm_log_stop, | |
915 | .log_sync = kvm_log_sync, | |
916 | .log_global_start = kvm_log_global_start, | |
917 | .log_global_stop = kvm_log_global_stop, | |
918 | .eventfd_add = kvm_mem_ioeventfd_add, | |
919 | .eventfd_del = kvm_mem_ioeventfd_del, | |
920 | .coalesced_mmio_add = kvm_coalesce_mmio_region, | |
921 | .coalesced_mmio_del = kvm_uncoalesce_mmio_region, | |
922 | .priority = 10, | |
923 | }; | |
924 | ||
925 | static MemoryListener kvm_io_listener = { | |
926 | .eventfd_add = kvm_io_ioeventfd_add, | |
927 | .eventfd_del = kvm_io_ioeventfd_del, | |
928 | .priority = 10, | |
929 | }; | |
930 | ||
931 | static void kvm_handle_interrupt(CPUState *cpu, int mask) | |
932 | { | |
933 | cpu->interrupt_request |= mask; | |
934 | ||
935 | if (!qemu_cpu_is_self(cpu)) { | |
936 | qemu_cpu_kick(cpu); | |
937 | } | |
938 | } | |
939 | ||
940 | int kvm_set_irq(KVMState *s, int irq, int level) | |
941 | { | |
942 | struct kvm_irq_level event; | |
943 | int ret; | |
944 | ||
945 | assert(kvm_async_interrupts_enabled()); | |
946 | ||
947 | event.level = level; | |
948 | event.irq = irq; | |
949 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); | |
950 | if (ret < 0) { | |
951 | perror("kvm_set_irq"); | |
952 | abort(); | |
953 | } | |
954 | ||
955 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; | |
956 | } | |
957 | ||
958 | #ifdef KVM_CAP_IRQ_ROUTING | |
959 | typedef struct KVMMSIRoute { | |
960 | struct kvm_irq_routing_entry kroute; | |
961 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
962 | } KVMMSIRoute; | |
963 | ||
964 | static void set_gsi(KVMState *s, unsigned int gsi) | |
965 | { | |
966 | s->used_gsi_bitmap[gsi / 32] |= 1U << (gsi % 32); | |
967 | } | |
968 | ||
969 | static void clear_gsi(KVMState *s, unsigned int gsi) | |
970 | { | |
971 | s->used_gsi_bitmap[gsi / 32] &= ~(1U << (gsi % 32)); | |
972 | } | |
973 | ||
974 | void kvm_init_irq_routing(KVMState *s) | |
975 | { | |
976 | int gsi_count, i; | |
977 | ||
978 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; | |
979 | if (gsi_count > 0) { | |
980 | unsigned int gsi_bits, i; | |
981 | ||
982 | /* Round up so we can search ints using ffs */ | |
983 | gsi_bits = ALIGN(gsi_count, 32); | |
984 | s->used_gsi_bitmap = g_malloc0(gsi_bits / 8); | |
985 | s->gsi_count = gsi_count; | |
986 | ||
987 | /* Mark any over-allocated bits as already in use */ | |
988 | for (i = gsi_count; i < gsi_bits; i++) { | |
989 | set_gsi(s, i); | |
990 | } | |
991 | } | |
992 | ||
993 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
994 | s->nr_allocated_irq_routes = 0; | |
995 | ||
996 | if (!s->direct_msi) { | |
997 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { | |
998 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
999 | } | |
1000 | } | |
1001 | ||
1002 | kvm_arch_init_irq_routing(s); | |
1003 | } | |
1004 | ||
1005 | void kvm_irqchip_commit_routes(KVMState *s) | |
1006 | { | |
1007 | int ret; | |
1008 | ||
1009 | s->irq_routes->flags = 0; | |
1010 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); | |
1011 | assert(ret == 0); | |
1012 | } | |
1013 | ||
1014 | static void kvm_add_routing_entry(KVMState *s, | |
1015 | struct kvm_irq_routing_entry *entry) | |
1016 | { | |
1017 | struct kvm_irq_routing_entry *new; | |
1018 | int n, size; | |
1019 | ||
1020 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
1021 | n = s->nr_allocated_irq_routes * 2; | |
1022 | if (n < 64) { | |
1023 | n = 64; | |
1024 | } | |
1025 | size = sizeof(struct kvm_irq_routing); | |
1026 | size += n * sizeof(*new); | |
1027 | s->irq_routes = g_realloc(s->irq_routes, size); | |
1028 | s->nr_allocated_irq_routes = n; | |
1029 | } | |
1030 | n = s->irq_routes->nr++; | |
1031 | new = &s->irq_routes->entries[n]; | |
1032 | ||
1033 | *new = *entry; | |
1034 | ||
1035 | set_gsi(s, entry->gsi); | |
1036 | } | |
1037 | ||
1038 | static int kvm_update_routing_entry(KVMState *s, | |
1039 | struct kvm_irq_routing_entry *new_entry) | |
1040 | { | |
1041 | struct kvm_irq_routing_entry *entry; | |
1042 | int n; | |
1043 | ||
1044 | for (n = 0; n < s->irq_routes->nr; n++) { | |
1045 | entry = &s->irq_routes->entries[n]; | |
1046 | if (entry->gsi != new_entry->gsi) { | |
1047 | continue; | |
1048 | } | |
1049 | ||
1050 | if(!memcmp(entry, new_entry, sizeof *entry)) { | |
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | *entry = *new_entry; | |
1055 | ||
1056 | kvm_irqchip_commit_routes(s); | |
1057 | ||
1058 | return 0; | |
1059 | } | |
1060 | ||
1061 | return -ESRCH; | |
1062 | } | |
1063 | ||
1064 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) | |
1065 | { | |
1066 | struct kvm_irq_routing_entry e = {}; | |
1067 | ||
1068 | assert(pin < s->gsi_count); | |
1069 | ||
1070 | e.gsi = irq; | |
1071 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1072 | e.flags = 0; | |
1073 | e.u.irqchip.irqchip = irqchip; | |
1074 | e.u.irqchip.pin = pin; | |
1075 | kvm_add_routing_entry(s, &e); | |
1076 | } | |
1077 | ||
1078 | void kvm_irqchip_release_virq(KVMState *s, int virq) | |
1079 | { | |
1080 | struct kvm_irq_routing_entry *e; | |
1081 | int i; | |
1082 | ||
1083 | if (kvm_gsi_direct_mapping()) { | |
1084 | return; | |
1085 | } | |
1086 | ||
1087 | for (i = 0; i < s->irq_routes->nr; i++) { | |
1088 | e = &s->irq_routes->entries[i]; | |
1089 | if (e->gsi == virq) { | |
1090 | s->irq_routes->nr--; | |
1091 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1092 | } | |
1093 | } | |
1094 | clear_gsi(s, virq); | |
1095 | } | |
1096 | ||
1097 | static unsigned int kvm_hash_msi(uint32_t data) | |
1098 | { | |
1099 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1100 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1101 | return data & 0xff; | |
1102 | } | |
1103 | ||
1104 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1105 | { | |
1106 | KVMMSIRoute *route, *next; | |
1107 | unsigned int hash; | |
1108 | ||
1109 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1110 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1111 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1112 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1113 | g_free(route); | |
1114 | } | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | static int kvm_irqchip_get_virq(KVMState *s) | |
1119 | { | |
1120 | uint32_t *word = s->used_gsi_bitmap; | |
1121 | int max_words = ALIGN(s->gsi_count, 32) / 32; | |
1122 | int i, bit; | |
1123 | bool retry = true; | |
1124 | ||
1125 | again: | |
1126 | /* Return the lowest unused GSI in the bitmap */ | |
1127 | for (i = 0; i < max_words; i++) { | |
1128 | bit = ffs(~word[i]); | |
1129 | if (!bit) { | |
1130 | continue; | |
1131 | } | |
1132 | ||
1133 | return bit - 1 + i * 32; | |
1134 | } | |
1135 | if (!s->direct_msi && retry) { | |
1136 | retry = false; | |
1137 | kvm_flush_dynamic_msi_routes(s); | |
1138 | goto again; | |
1139 | } | |
1140 | return -ENOSPC; | |
1141 | ||
1142 | } | |
1143 | ||
1144 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1145 | { | |
1146 | unsigned int hash = kvm_hash_msi(msg.data); | |
1147 | KVMMSIRoute *route; | |
1148 | ||
1149 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1150 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1151 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
1152 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { | |
1153 | return route; | |
1154 | } | |
1155 | } | |
1156 | return NULL; | |
1157 | } | |
1158 | ||
1159 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1160 | { | |
1161 | struct kvm_msi msi; | |
1162 | KVMMSIRoute *route; | |
1163 | ||
1164 | if (s->direct_msi) { | |
1165 | msi.address_lo = (uint32_t)msg.address; | |
1166 | msi.address_hi = msg.address >> 32; | |
1167 | msi.data = le32_to_cpu(msg.data); | |
1168 | msi.flags = 0; | |
1169 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1170 | ||
1171 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1172 | } | |
1173 | ||
1174 | route = kvm_lookup_msi_route(s, msg); | |
1175 | if (!route) { | |
1176 | int virq; | |
1177 | ||
1178 | virq = kvm_irqchip_get_virq(s); | |
1179 | if (virq < 0) { | |
1180 | return virq; | |
1181 | } | |
1182 | ||
1183 | route = g_malloc0(sizeof(KVMMSIRoute)); | |
1184 | route->kroute.gsi = virq; | |
1185 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1186 | route->kroute.flags = 0; | |
1187 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1188 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
1189 | route->kroute.u.msi.data = le32_to_cpu(msg.data); | |
1190 | ||
1191 | kvm_add_routing_entry(s, &route->kroute); | |
1192 | kvm_irqchip_commit_routes(s); | |
1193 | ||
1194 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1195 | entry); | |
1196 | } | |
1197 | ||
1198 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1199 | ||
1200 | return kvm_set_irq(s, route->kroute.gsi, 1); | |
1201 | } | |
1202 | ||
1203 | int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) | |
1204 | { | |
1205 | struct kvm_irq_routing_entry kroute = {}; | |
1206 | int virq; | |
1207 | ||
1208 | if (kvm_gsi_direct_mapping()) { | |
1209 | return msg.data & 0xffff; | |
1210 | } | |
1211 | ||
1212 | if (!kvm_gsi_routing_enabled()) { | |
1213 | return -ENOSYS; | |
1214 | } | |
1215 | ||
1216 | virq = kvm_irqchip_get_virq(s); | |
1217 | if (virq < 0) { | |
1218 | return virq; | |
1219 | } | |
1220 | ||
1221 | kroute.gsi = virq; | |
1222 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1223 | kroute.flags = 0; | |
1224 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1225 | kroute.u.msi.address_hi = msg.address >> 32; | |
1226 | kroute.u.msi.data = le32_to_cpu(msg.data); | |
1227 | ||
1228 | kvm_add_routing_entry(s, &kroute); | |
1229 | kvm_irqchip_commit_routes(s); | |
1230 | ||
1231 | return virq; | |
1232 | } | |
1233 | ||
1234 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
1235 | { | |
1236 | struct kvm_irq_routing_entry kroute = {}; | |
1237 | ||
1238 | if (kvm_gsi_direct_mapping()) { | |
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | if (!kvm_irqchip_in_kernel()) { | |
1243 | return -ENOSYS; | |
1244 | } | |
1245 | ||
1246 | kroute.gsi = virq; | |
1247 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1248 | kroute.flags = 0; | |
1249 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1250 | kroute.u.msi.address_hi = msg.address >> 32; | |
1251 | kroute.u.msi.data = le32_to_cpu(msg.data); | |
1252 | ||
1253 | return kvm_update_routing_entry(s, &kroute); | |
1254 | } | |
1255 | ||
1256 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, | |
1257 | bool assign) | |
1258 | { | |
1259 | struct kvm_irqfd irqfd = { | |
1260 | .fd = fd, | |
1261 | .gsi = virq, | |
1262 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
1263 | }; | |
1264 | ||
1265 | if (rfd != -1) { | |
1266 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
1267 | irqfd.resamplefd = rfd; | |
1268 | } | |
1269 | ||
1270 | if (!kvm_irqfds_enabled()) { | |
1271 | return -ENOSYS; | |
1272 | } | |
1273 | ||
1274 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
1275 | } | |
1276 | ||
1277 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) | |
1278 | { | |
1279 | struct kvm_irq_routing_entry kroute; | |
1280 | int virq; | |
1281 | ||
1282 | if (!kvm_gsi_routing_enabled()) { | |
1283 | return -ENOSYS; | |
1284 | } | |
1285 | ||
1286 | virq = kvm_irqchip_get_virq(s); | |
1287 | if (virq < 0) { | |
1288 | return virq; | |
1289 | } | |
1290 | ||
1291 | kroute.gsi = virq; | |
1292 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
1293 | kroute.flags = 0; | |
1294 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
1295 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
1296 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
1297 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
1298 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
1299 | ||
1300 | kvm_add_routing_entry(s, &kroute); | |
1301 | kvm_irqchip_commit_routes(s); | |
1302 | ||
1303 | return virq; | |
1304 | } | |
1305 | ||
1306 | #else /* !KVM_CAP_IRQ_ROUTING */ | |
1307 | ||
1308 | void kvm_init_irq_routing(KVMState *s) | |
1309 | { | |
1310 | } | |
1311 | ||
1312 | void kvm_irqchip_release_virq(KVMState *s, int virq) | |
1313 | { | |
1314 | } | |
1315 | ||
1316 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1317 | { | |
1318 | abort(); | |
1319 | } | |
1320 | ||
1321 | int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) | |
1322 | { | |
1323 | return -ENOSYS; | |
1324 | } | |
1325 | ||
1326 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) | |
1327 | { | |
1328 | return -ENOSYS; | |
1329 | } | |
1330 | ||
1331 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) | |
1332 | { | |
1333 | abort(); | |
1334 | } | |
1335 | ||
1336 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
1337 | { | |
1338 | return -ENOSYS; | |
1339 | } | |
1340 | #endif /* !KVM_CAP_IRQ_ROUTING */ | |
1341 | ||
1342 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, | |
1343 | EventNotifier *rn, int virq) | |
1344 | { | |
1345 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), | |
1346 | rn ? event_notifier_get_fd(rn) : -1, virq, true); | |
1347 | } | |
1348 | ||
1349 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq) | |
1350 | { | |
1351 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq, | |
1352 | false); | |
1353 | } | |
1354 | ||
1355 | static int kvm_irqchip_create(KVMState *s) | |
1356 | { | |
1357 | int ret; | |
1358 | ||
1359 | if (!qemu_opt_get_bool(qemu_get_machine_opts(), "kernel_irqchip", true) || | |
1360 | (!kvm_check_extension(s, KVM_CAP_IRQCHIP) && | |
1361 | (kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0) < 0))) { | |
1362 | return 0; | |
1363 | } | |
1364 | ||
1365 | /* First probe and see if there's a arch-specific hook to create the | |
1366 | * in-kernel irqchip for us */ | |
1367 | ret = kvm_arch_irqchip_create(s); | |
1368 | if (ret < 0) { | |
1369 | return ret; | |
1370 | } else if (ret == 0) { | |
1371 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1372 | if (ret < 0) { | |
1373 | fprintf(stderr, "Create kernel irqchip failed\n"); | |
1374 | return ret; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | kvm_kernel_irqchip = true; | |
1379 | /* If we have an in-kernel IRQ chip then we must have asynchronous | |
1380 | * interrupt delivery (though the reverse is not necessarily true) | |
1381 | */ | |
1382 | kvm_async_interrupts_allowed = true; | |
1383 | kvm_halt_in_kernel_allowed = true; | |
1384 | ||
1385 | kvm_init_irq_routing(s); | |
1386 | ||
1387 | return 0; | |
1388 | } | |
1389 | ||
1390 | /* Find number of supported CPUs using the recommended | |
1391 | * procedure from the kernel API documentation to cope with | |
1392 | * older kernels that may be missing capabilities. | |
1393 | */ | |
1394 | static int kvm_recommended_vcpus(KVMState *s) | |
1395 | { | |
1396 | int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS); | |
1397 | return (ret) ? ret : 4; | |
1398 | } | |
1399 | ||
1400 | static int kvm_max_vcpus(KVMState *s) | |
1401 | { | |
1402 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
1403 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
1404 | } | |
1405 | ||
1406 | static int kvm_init(MachineState *ms) | |
1407 | { | |
1408 | MachineClass *mc = MACHINE_GET_CLASS(ms); | |
1409 | static const char upgrade_note[] = | |
1410 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1411 | "(see http://sourceforge.net/projects/kvm).\n"; | |
1412 | struct { | |
1413 | const char *name; | |
1414 | int num; | |
1415 | } num_cpus[] = { | |
1416 | { "SMP", smp_cpus }, | |
1417 | { "hotpluggable", max_cpus }, | |
1418 | { NULL, } | |
1419 | }, *nc = num_cpus; | |
1420 | int soft_vcpus_limit, hard_vcpus_limit; | |
1421 | KVMState *s; | |
1422 | const KVMCapabilityInfo *missing_cap; | |
1423 | int ret; | |
1424 | int i, type = 0; | |
1425 | const char *kvm_type; | |
1426 | ||
1427 | s = KVM_STATE(ms->accelerator); | |
1428 | ||
1429 | /* | |
1430 | * On systems where the kernel can support different base page | |
1431 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
1432 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
1433 | * page size for the system though. | |
1434 | */ | |
1435 | assert(TARGET_PAGE_SIZE <= getpagesize()); | |
1436 | page_size_init(); | |
1437 | ||
1438 | s->sigmask_len = 8; | |
1439 | ||
1440 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
1441 | QTAILQ_INIT(&s->kvm_sw_breakpoints); | |
1442 | #endif | |
1443 | s->vmfd = -1; | |
1444 | s->fd = qemu_open("/dev/kvm", O_RDWR); | |
1445 | if (s->fd == -1) { | |
1446 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
1447 | ret = -errno; | |
1448 | goto err; | |
1449 | } | |
1450 | ||
1451 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
1452 | if (ret < KVM_API_VERSION) { | |
1453 | if (ret >= 0) { | |
1454 | ret = -EINVAL; | |
1455 | } | |
1456 | fprintf(stderr, "kvm version too old\n"); | |
1457 | goto err; | |
1458 | } | |
1459 | ||
1460 | if (ret > KVM_API_VERSION) { | |
1461 | ret = -EINVAL; | |
1462 | fprintf(stderr, "kvm version not supported\n"); | |
1463 | goto err; | |
1464 | } | |
1465 | ||
1466 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); | |
1467 | ||
1468 | /* If unspecified, use the default value */ | |
1469 | if (!s->nr_slots) { | |
1470 | s->nr_slots = 32; | |
1471 | } | |
1472 | ||
1473 | s->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); | |
1474 | ||
1475 | for (i = 0; i < s->nr_slots; i++) { | |
1476 | s->slots[i].slot = i; | |
1477 | } | |
1478 | ||
1479 | /* check the vcpu limits */ | |
1480 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
1481 | hard_vcpus_limit = kvm_max_vcpus(s); | |
1482 | ||
1483 | while (nc->name) { | |
1484 | if (nc->num > soft_vcpus_limit) { | |
1485 | fprintf(stderr, | |
1486 | "Warning: Number of %s cpus requested (%d) exceeds " | |
1487 | "the recommended cpus supported by KVM (%d)\n", | |
1488 | nc->name, nc->num, soft_vcpus_limit); | |
1489 | ||
1490 | if (nc->num > hard_vcpus_limit) { | |
1491 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " | |
1492 | "the maximum cpus supported by KVM (%d)\n", | |
1493 | nc->name, nc->num, hard_vcpus_limit); | |
1494 | exit(1); | |
1495 | } | |
1496 | } | |
1497 | nc++; | |
1498 | } | |
1499 | ||
1500 | kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type"); | |
1501 | if (mc->kvm_type) { | |
1502 | type = mc->kvm_type(kvm_type); | |
1503 | } else if (kvm_type) { | |
1504 | ret = -EINVAL; | |
1505 | fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type); | |
1506 | goto err; | |
1507 | } | |
1508 | ||
1509 | do { | |
1510 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); | |
1511 | } while (ret == -EINTR); | |
1512 | ||
1513 | if (ret < 0) { | |
1514 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, | |
1515 | strerror(-ret)); | |
1516 | ||
1517 | #ifdef TARGET_S390X | |
1518 | fprintf(stderr, "Please add the 'switch_amode' kernel parameter to " | |
1519 | "your host kernel command line\n"); | |
1520 | #endif | |
1521 | goto err; | |
1522 | } | |
1523 | ||
1524 | s->vmfd = ret; | |
1525 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); | |
1526 | if (!missing_cap) { | |
1527 | missing_cap = | |
1528 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
1529 | } | |
1530 | if (missing_cap) { | |
1531 | ret = -EINVAL; | |
1532 | fprintf(stderr, "kvm does not support %s\n%s", | |
1533 | missing_cap->name, upgrade_note); | |
1534 | goto err; | |
1535 | } | |
1536 | ||
1537 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); | |
1538 | ||
1539 | s->broken_set_mem_region = 1; | |
1540 | ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); | |
1541 | if (ret > 0) { | |
1542 | s->broken_set_mem_region = 0; | |
1543 | } | |
1544 | ||
1545 | #ifdef KVM_CAP_VCPU_EVENTS | |
1546 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
1547 | #endif | |
1548 | ||
1549 | s->robust_singlestep = | |
1550 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
1551 | ||
1552 | #ifdef KVM_CAP_DEBUGREGS | |
1553 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
1554 | #endif | |
1555 | ||
1556 | #ifdef KVM_CAP_XSAVE | |
1557 | s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE); | |
1558 | #endif | |
1559 | ||
1560 | #ifdef KVM_CAP_XCRS | |
1561 | s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS); | |
1562 | #endif | |
1563 | ||
1564 | #ifdef KVM_CAP_PIT_STATE2 | |
1565 | s->pit_state2 = kvm_check_extension(s, KVM_CAP_PIT_STATE2); | |
1566 | #endif | |
1567 | ||
1568 | #ifdef KVM_CAP_IRQ_ROUTING | |
1569 | s->direct_msi = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); | |
1570 | #endif | |
1571 | ||
1572 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); | |
1573 | ||
1574 | s->irq_set_ioctl = KVM_IRQ_LINE; | |
1575 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { | |
1576 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; | |
1577 | } | |
1578 | ||
1579 | #ifdef KVM_CAP_READONLY_MEM | |
1580 | kvm_readonly_mem_allowed = | |
1581 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
1582 | #endif | |
1583 | ||
1584 | kvm_eventfds_allowed = | |
1585 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
1586 | ||
1587 | ret = kvm_arch_init(s); | |
1588 | if (ret < 0) { | |
1589 | goto err; | |
1590 | } | |
1591 | ||
1592 | ret = kvm_irqchip_create(s); | |
1593 | if (ret < 0) { | |
1594 | goto err; | |
1595 | } | |
1596 | ||
1597 | kvm_state = s; | |
1598 | memory_listener_register(&kvm_memory_listener, &address_space_memory); | |
1599 | memory_listener_register(&kvm_io_listener, &address_space_io); | |
1600 | ||
1601 | s->many_ioeventfds = kvm_check_many_ioeventfds(); | |
1602 | ||
1603 | cpu_interrupt_handler = kvm_handle_interrupt; | |
1604 | ||
1605 | return 0; | |
1606 | ||
1607 | err: | |
1608 | assert(ret < 0); | |
1609 | if (s->vmfd >= 0) { | |
1610 | close(s->vmfd); | |
1611 | } | |
1612 | if (s->fd != -1) { | |
1613 | close(s->fd); | |
1614 | } | |
1615 | g_free(s->slots); | |
1616 | ||
1617 | return ret; | |
1618 | } | |
1619 | ||
1620 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) | |
1621 | { | |
1622 | s->sigmask_len = sigmask_len; | |
1623 | } | |
1624 | ||
1625 | static void kvm_handle_io(uint16_t port, void *data, int direction, int size, | |
1626 | uint32_t count) | |
1627 | { | |
1628 | int i; | |
1629 | uint8_t *ptr = data; | |
1630 | ||
1631 | for (i = 0; i < count; i++) { | |
1632 | address_space_rw(&address_space_io, port, ptr, size, | |
1633 | direction == KVM_EXIT_IO_OUT); | |
1634 | ptr += size; | |
1635 | } | |
1636 | } | |
1637 | ||
1638 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) | |
1639 | { | |
1640 | fprintf(stderr, "KVM internal error. Suberror: %d\n", | |
1641 | run->internal.suberror); | |
1642 | ||
1643 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { | |
1644 | int i; | |
1645 | ||
1646 | for (i = 0; i < run->internal.ndata; ++i) { | |
1647 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
1648 | i, (uint64_t)run->internal.data[i]); | |
1649 | } | |
1650 | } | |
1651 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { | |
1652 | fprintf(stderr, "emulation failure\n"); | |
1653 | if (!kvm_arch_stop_on_emulation_error(cpu)) { | |
1654 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); | |
1655 | return EXCP_INTERRUPT; | |
1656 | } | |
1657 | } | |
1658 | /* FIXME: Should trigger a qmp message to let management know | |
1659 | * something went wrong. | |
1660 | */ | |
1661 | return -1; | |
1662 | } | |
1663 | ||
1664 | void kvm_flush_coalesced_mmio_buffer(void) | |
1665 | { | |
1666 | KVMState *s = kvm_state; | |
1667 | ||
1668 | if (s->coalesced_flush_in_progress) { | |
1669 | return; | |
1670 | } | |
1671 | ||
1672 | s->coalesced_flush_in_progress = true; | |
1673 | ||
1674 | if (s->coalesced_mmio_ring) { | |
1675 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
1676 | while (ring->first != ring->last) { | |
1677 | struct kvm_coalesced_mmio *ent; | |
1678 | ||
1679 | ent = &ring->coalesced_mmio[ring->first]; | |
1680 | ||
1681 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
1682 | smp_wmb(); | |
1683 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; | |
1684 | } | |
1685 | } | |
1686 | ||
1687 | s->coalesced_flush_in_progress = false; | |
1688 | } | |
1689 | ||
1690 | static void do_kvm_cpu_synchronize_state(void *arg) | |
1691 | { | |
1692 | CPUState *cpu = arg; | |
1693 | ||
1694 | if (!cpu->kvm_vcpu_dirty) { | |
1695 | kvm_arch_get_registers(cpu); | |
1696 | cpu->kvm_vcpu_dirty = true; | |
1697 | } | |
1698 | } | |
1699 | ||
1700 | void kvm_cpu_synchronize_state(CPUState *cpu) | |
1701 | { | |
1702 | if (!cpu->kvm_vcpu_dirty) { | |
1703 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, cpu); | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | static void do_kvm_cpu_synchronize_post_reset(void *arg) | |
1708 | { | |
1709 | CPUState *cpu = arg; | |
1710 | ||
1711 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); | |
1712 | cpu->kvm_vcpu_dirty = false; | |
1713 | } | |
1714 | ||
1715 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) | |
1716 | { | |
1717 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, cpu); | |
1718 | } | |
1719 | ||
1720 | static void do_kvm_cpu_synchronize_post_init(void *arg) | |
1721 | { | |
1722 | CPUState *cpu = arg; | |
1723 | ||
1724 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); | |
1725 | cpu->kvm_vcpu_dirty = false; | |
1726 | } | |
1727 | ||
1728 | void kvm_cpu_synchronize_post_init(CPUState *cpu) | |
1729 | { | |
1730 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, cpu); | |
1731 | } | |
1732 | ||
1733 | void kvm_cpu_clean_state(CPUState *cpu) | |
1734 | { | |
1735 | cpu->kvm_vcpu_dirty = false; | |
1736 | } | |
1737 | ||
1738 | int kvm_cpu_exec(CPUState *cpu) | |
1739 | { | |
1740 | struct kvm_run *run = cpu->kvm_run; | |
1741 | int ret, run_ret; | |
1742 | ||
1743 | DPRINTF("kvm_cpu_exec()\n"); | |
1744 | ||
1745 | if (kvm_arch_process_async_events(cpu)) { | |
1746 | cpu->exit_request = 0; | |
1747 | return EXCP_HLT; | |
1748 | } | |
1749 | ||
1750 | do { | |
1751 | if (cpu->kvm_vcpu_dirty) { | |
1752 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); | |
1753 | cpu->kvm_vcpu_dirty = false; | |
1754 | } | |
1755 | ||
1756 | kvm_arch_pre_run(cpu, run); | |
1757 | if (cpu->exit_request) { | |
1758 | DPRINTF("interrupt exit requested\n"); | |
1759 | /* | |
1760 | * KVM requires us to reenter the kernel after IO exits to complete | |
1761 | * instruction emulation. This self-signal will ensure that we | |
1762 | * leave ASAP again. | |
1763 | */ | |
1764 | qemu_cpu_kick_self(); | |
1765 | } | |
1766 | qemu_mutex_unlock_iothread(); | |
1767 | ||
1768 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); | |
1769 | ||
1770 | qemu_mutex_lock_iothread(); | |
1771 | kvm_arch_post_run(cpu, run); | |
1772 | ||
1773 | if (run_ret < 0) { | |
1774 | if (run_ret == -EINTR || run_ret == -EAGAIN) { | |
1775 | DPRINTF("io window exit\n"); | |
1776 | ret = EXCP_INTERRUPT; | |
1777 | break; | |
1778 | } | |
1779 | fprintf(stderr, "error: kvm run failed %s\n", | |
1780 | strerror(-run_ret)); | |
1781 | ret = -1; | |
1782 | break; | |
1783 | } | |
1784 | ||
1785 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); | |
1786 | switch (run->exit_reason) { | |
1787 | case KVM_EXIT_IO: | |
1788 | DPRINTF("handle_io\n"); | |
1789 | kvm_handle_io(run->io.port, | |
1790 | (uint8_t *)run + run->io.data_offset, | |
1791 | run->io.direction, | |
1792 | run->io.size, | |
1793 | run->io.count); | |
1794 | ret = 0; | |
1795 | break; | |
1796 | case KVM_EXIT_MMIO: | |
1797 | DPRINTF("handle_mmio\n"); | |
1798 | cpu_physical_memory_rw(run->mmio.phys_addr, | |
1799 | run->mmio.data, | |
1800 | run->mmio.len, | |
1801 | run->mmio.is_write); | |
1802 | ret = 0; | |
1803 | break; | |
1804 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
1805 | DPRINTF("irq_window_open\n"); | |
1806 | ret = EXCP_INTERRUPT; | |
1807 | break; | |
1808 | case KVM_EXIT_SHUTDOWN: | |
1809 | DPRINTF("shutdown\n"); | |
1810 | qemu_system_reset_request(); | |
1811 | ret = EXCP_INTERRUPT; | |
1812 | break; | |
1813 | case KVM_EXIT_UNKNOWN: | |
1814 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", | |
1815 | (uint64_t)run->hw.hardware_exit_reason); | |
1816 | ret = -1; | |
1817 | break; | |
1818 | case KVM_EXIT_INTERNAL_ERROR: | |
1819 | ret = kvm_handle_internal_error(cpu, run); | |
1820 | break; | |
1821 | case KVM_EXIT_SYSTEM_EVENT: | |
1822 | switch (run->system_event.type) { | |
1823 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
1824 | qemu_system_shutdown_request(); | |
1825 | ret = EXCP_INTERRUPT; | |
1826 | break; | |
1827 | case KVM_SYSTEM_EVENT_RESET: | |
1828 | qemu_system_reset_request(); | |
1829 | ret = EXCP_INTERRUPT; | |
1830 | break; | |
1831 | default: | |
1832 | DPRINTF("kvm_arch_handle_exit\n"); | |
1833 | ret = kvm_arch_handle_exit(cpu, run); | |
1834 | break; | |
1835 | } | |
1836 | break; | |
1837 | default: | |
1838 | DPRINTF("kvm_arch_handle_exit\n"); | |
1839 | ret = kvm_arch_handle_exit(cpu, run); | |
1840 | break; | |
1841 | } | |
1842 | } while (ret == 0); | |
1843 | ||
1844 | if (ret < 0) { | |
1845 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); | |
1846 | vm_stop(RUN_STATE_INTERNAL_ERROR); | |
1847 | } | |
1848 | ||
1849 | cpu->exit_request = 0; | |
1850 | return ret; | |
1851 | } | |
1852 | ||
1853 | int kvm_ioctl(KVMState *s, int type, ...) | |
1854 | { | |
1855 | int ret; | |
1856 | void *arg; | |
1857 | va_list ap; | |
1858 | ||
1859 | va_start(ap, type); | |
1860 | arg = va_arg(ap, void *); | |
1861 | va_end(ap); | |
1862 | ||
1863 | trace_kvm_ioctl(type, arg); | |
1864 | ret = ioctl(s->fd, type, arg); | |
1865 | if (ret == -1) { | |
1866 | ret = -errno; | |
1867 | } | |
1868 | return ret; | |
1869 | } | |
1870 | ||
1871 | int kvm_vm_ioctl(KVMState *s, int type, ...) | |
1872 | { | |
1873 | int ret; | |
1874 | void *arg; | |
1875 | va_list ap; | |
1876 | ||
1877 | va_start(ap, type); | |
1878 | arg = va_arg(ap, void *); | |
1879 | va_end(ap); | |
1880 | ||
1881 | trace_kvm_vm_ioctl(type, arg); | |
1882 | ret = ioctl(s->vmfd, type, arg); | |
1883 | if (ret == -1) { | |
1884 | ret = -errno; | |
1885 | } | |
1886 | return ret; | |
1887 | } | |
1888 | ||
1889 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) | |
1890 | { | |
1891 | int ret; | |
1892 | void *arg; | |
1893 | va_list ap; | |
1894 | ||
1895 | va_start(ap, type); | |
1896 | arg = va_arg(ap, void *); | |
1897 | va_end(ap); | |
1898 | ||
1899 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); | |
1900 | ret = ioctl(cpu->kvm_fd, type, arg); | |
1901 | if (ret == -1) { | |
1902 | ret = -errno; | |
1903 | } | |
1904 | return ret; | |
1905 | } | |
1906 | ||
1907 | int kvm_device_ioctl(int fd, int type, ...) | |
1908 | { | |
1909 | int ret; | |
1910 | void *arg; | |
1911 | va_list ap; | |
1912 | ||
1913 | va_start(ap, type); | |
1914 | arg = va_arg(ap, void *); | |
1915 | va_end(ap); | |
1916 | ||
1917 | trace_kvm_device_ioctl(fd, type, arg); | |
1918 | ret = ioctl(fd, type, arg); | |
1919 | if (ret == -1) { | |
1920 | ret = -errno; | |
1921 | } | |
1922 | return ret; | |
1923 | } | |
1924 | ||
1925 | int kvm_has_sync_mmu(void) | |
1926 | { | |
1927 | return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); | |
1928 | } | |
1929 | ||
1930 | int kvm_has_vcpu_events(void) | |
1931 | { | |
1932 | return kvm_state->vcpu_events; | |
1933 | } | |
1934 | ||
1935 | int kvm_has_robust_singlestep(void) | |
1936 | { | |
1937 | return kvm_state->robust_singlestep; | |
1938 | } | |
1939 | ||
1940 | int kvm_has_debugregs(void) | |
1941 | { | |
1942 | return kvm_state->debugregs; | |
1943 | } | |
1944 | ||
1945 | int kvm_has_xsave(void) | |
1946 | { | |
1947 | return kvm_state->xsave; | |
1948 | } | |
1949 | ||
1950 | int kvm_has_xcrs(void) | |
1951 | { | |
1952 | return kvm_state->xcrs; | |
1953 | } | |
1954 | ||
1955 | int kvm_has_pit_state2(void) | |
1956 | { | |
1957 | return kvm_state->pit_state2; | |
1958 | } | |
1959 | ||
1960 | int kvm_has_many_ioeventfds(void) | |
1961 | { | |
1962 | if (!kvm_enabled()) { | |
1963 | return 0; | |
1964 | } | |
1965 | return kvm_state->many_ioeventfds; | |
1966 | } | |
1967 | ||
1968 | int kvm_has_gsi_routing(void) | |
1969 | { | |
1970 | #ifdef KVM_CAP_IRQ_ROUTING | |
1971 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); | |
1972 | #else | |
1973 | return false; | |
1974 | #endif | |
1975 | } | |
1976 | ||
1977 | int kvm_has_intx_set_mask(void) | |
1978 | { | |
1979 | return kvm_state->intx_set_mask; | |
1980 | } | |
1981 | ||
1982 | void kvm_setup_guest_memory(void *start, size_t size) | |
1983 | { | |
1984 | if (!kvm_has_sync_mmu()) { | |
1985 | int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK); | |
1986 | ||
1987 | if (ret) { | |
1988 | perror("qemu_madvise"); | |
1989 | fprintf(stderr, | |
1990 | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n"); | |
1991 | exit(1); | |
1992 | } | |
1993 | } | |
1994 | } | |
1995 | ||
1996 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
1997 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, | |
1998 | target_ulong pc) | |
1999 | { | |
2000 | struct kvm_sw_breakpoint *bp; | |
2001 | ||
2002 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { | |
2003 | if (bp->pc == pc) { | |
2004 | return bp; | |
2005 | } | |
2006 | } | |
2007 | return NULL; | |
2008 | } | |
2009 | ||
2010 | int kvm_sw_breakpoints_active(CPUState *cpu) | |
2011 | { | |
2012 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); | |
2013 | } | |
2014 | ||
2015 | struct kvm_set_guest_debug_data { | |
2016 | struct kvm_guest_debug dbg; | |
2017 | CPUState *cpu; | |
2018 | int err; | |
2019 | }; | |
2020 | ||
2021 | static void kvm_invoke_set_guest_debug(void *data) | |
2022 | { | |
2023 | struct kvm_set_guest_debug_data *dbg_data = data; | |
2024 | ||
2025 | dbg_data->err = kvm_vcpu_ioctl(dbg_data->cpu, KVM_SET_GUEST_DEBUG, | |
2026 | &dbg_data->dbg); | |
2027 | } | |
2028 | ||
2029 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) | |
2030 | { | |
2031 | struct kvm_set_guest_debug_data data; | |
2032 | ||
2033 | data.dbg.control = reinject_trap; | |
2034 | ||
2035 | if (cpu->singlestep_enabled) { | |
2036 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; | |
2037 | } | |
2038 | kvm_arch_update_guest_debug(cpu, &data.dbg); | |
2039 | data.cpu = cpu; | |
2040 | ||
2041 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, &data); | |
2042 | return data.err; | |
2043 | } | |
2044 | ||
2045 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, | |
2046 | target_ulong len, int type) | |
2047 | { | |
2048 | struct kvm_sw_breakpoint *bp; | |
2049 | int err; | |
2050 | ||
2051 | if (type == GDB_BREAKPOINT_SW) { | |
2052 | bp = kvm_find_sw_breakpoint(cpu, addr); | |
2053 | if (bp) { | |
2054 | bp->use_count++; | |
2055 | return 0; | |
2056 | } | |
2057 | ||
2058 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); | |
2059 | if (!bp) { | |
2060 | return -ENOMEM; | |
2061 | } | |
2062 | ||
2063 | bp->pc = addr; | |
2064 | bp->use_count = 1; | |
2065 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); | |
2066 | if (err) { | |
2067 | g_free(bp); | |
2068 | return err; | |
2069 | } | |
2070 | ||
2071 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); | |
2072 | } else { | |
2073 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
2074 | if (err) { | |
2075 | return err; | |
2076 | } | |
2077 | } | |
2078 | ||
2079 | CPU_FOREACH(cpu) { | |
2080 | err = kvm_update_guest_debug(cpu, 0); | |
2081 | if (err) { | |
2082 | return err; | |
2083 | } | |
2084 | } | |
2085 | return 0; | |
2086 | } | |
2087 | ||
2088 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, | |
2089 | target_ulong len, int type) | |
2090 | { | |
2091 | struct kvm_sw_breakpoint *bp; | |
2092 | int err; | |
2093 | ||
2094 | if (type == GDB_BREAKPOINT_SW) { | |
2095 | bp = kvm_find_sw_breakpoint(cpu, addr); | |
2096 | if (!bp) { | |
2097 | return -ENOENT; | |
2098 | } | |
2099 | ||
2100 | if (bp->use_count > 1) { | |
2101 | bp->use_count--; | |
2102 | return 0; | |
2103 | } | |
2104 | ||
2105 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); | |
2106 | if (err) { | |
2107 | return err; | |
2108 | } | |
2109 | ||
2110 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); | |
2111 | g_free(bp); | |
2112 | } else { | |
2113 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
2114 | if (err) { | |
2115 | return err; | |
2116 | } | |
2117 | } | |
2118 | ||
2119 | CPU_FOREACH(cpu) { | |
2120 | err = kvm_update_guest_debug(cpu, 0); | |
2121 | if (err) { | |
2122 | return err; | |
2123 | } | |
2124 | } | |
2125 | return 0; | |
2126 | } | |
2127 | ||
2128 | void kvm_remove_all_breakpoints(CPUState *cpu) | |
2129 | { | |
2130 | struct kvm_sw_breakpoint *bp, *next; | |
2131 | KVMState *s = cpu->kvm_state; | |
2132 | CPUState *tmpcpu; | |
2133 | ||
2134 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { | |
2135 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { | |
2136 | /* Try harder to find a CPU that currently sees the breakpoint. */ | |
2137 | CPU_FOREACH(tmpcpu) { | |
2138 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
2139 | break; | |
2140 | } | |
2141 | } | |
2142 | } | |
2143 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); | |
2144 | g_free(bp); | |
2145 | } | |
2146 | kvm_arch_remove_all_hw_breakpoints(); | |
2147 | ||
2148 | CPU_FOREACH(cpu) { | |
2149 | kvm_update_guest_debug(cpu, 0); | |
2150 | } | |
2151 | } | |
2152 | ||
2153 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2154 | ||
2155 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) | |
2156 | { | |
2157 | return -EINVAL; | |
2158 | } | |
2159 | ||
2160 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, | |
2161 | target_ulong len, int type) | |
2162 | { | |
2163 | return -EINVAL; | |
2164 | } | |
2165 | ||
2166 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, | |
2167 | target_ulong len, int type) | |
2168 | { | |
2169 | return -EINVAL; | |
2170 | } | |
2171 | ||
2172 | void kvm_remove_all_breakpoints(CPUState *cpu) | |
2173 | { | |
2174 | } | |
2175 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2176 | ||
2177 | int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) | |
2178 | { | |
2179 | KVMState *s = kvm_state; | |
2180 | struct kvm_signal_mask *sigmask; | |
2181 | int r; | |
2182 | ||
2183 | if (!sigset) { | |
2184 | return kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, NULL); | |
2185 | } | |
2186 | ||
2187 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); | |
2188 | ||
2189 | sigmask->len = s->sigmask_len; | |
2190 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); | |
2191 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); | |
2192 | g_free(sigmask); | |
2193 | ||
2194 | return r; | |
2195 | } | |
2196 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) | |
2197 | { | |
2198 | return kvm_arch_on_sigbus_vcpu(cpu, code, addr); | |
2199 | } | |
2200 | ||
2201 | int kvm_on_sigbus(int code, void *addr) | |
2202 | { | |
2203 | return kvm_arch_on_sigbus(code, addr); | |
2204 | } | |
2205 | ||
2206 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
2207 | { | |
2208 | int ret; | |
2209 | struct kvm_create_device create_dev; | |
2210 | ||
2211 | create_dev.type = type; | |
2212 | create_dev.fd = -1; | |
2213 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
2214 | ||
2215 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
2216 | return -ENOTSUP; | |
2217 | } | |
2218 | ||
2219 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
2220 | if (ret) { | |
2221 | return ret; | |
2222 | } | |
2223 | ||
2224 | return test ? 0 : create_dev.fd; | |
2225 | } | |
2226 | ||
2227 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) | |
2228 | { | |
2229 | struct kvm_one_reg reg; | |
2230 | int r; | |
2231 | ||
2232 | reg.id = id; | |
2233 | reg.addr = (uintptr_t) source; | |
2234 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
2235 | if (r) { | |
2236 | trace_kvm_failed_reg_set(id, strerror(r)); | |
2237 | } | |
2238 | return r; | |
2239 | } | |
2240 | ||
2241 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
2242 | { | |
2243 | struct kvm_one_reg reg; | |
2244 | int r; | |
2245 | ||
2246 | reg.id = id; | |
2247 | reg.addr = (uintptr_t) target; | |
2248 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
2249 | if (r) { | |
2250 | trace_kvm_failed_reg_get(id, strerror(r)); | |
2251 | } | |
2252 | return r; | |
2253 | } | |
2254 | ||
2255 | static void kvm_accel_class_init(ObjectClass *oc, void *data) | |
2256 | { | |
2257 | AccelClass *ac = ACCEL_CLASS(oc); | |
2258 | ac->name = "KVM"; | |
2259 | ac->init_machine = kvm_init; | |
2260 | ac->allowed = &kvm_allowed; | |
2261 | } | |
2262 | ||
2263 | static const TypeInfo kvm_accel_type = { | |
2264 | .name = TYPE_KVM_ACCEL, | |
2265 | .parent = TYPE_ACCEL, | |
2266 | .class_init = kvm_accel_class_init, | |
2267 | .instance_size = sizeof(KVMState), | |
2268 | }; | |
2269 | ||
2270 | static void kvm_type_init(void) | |
2271 | { | |
2272 | type_register_static(&kvm_accel_type); | |
2273 | } | |
2274 | ||
2275 | type_init(kvm_type_init); |