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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 "qemu/error-report.h" | |
28 | #include "hw/hw.h" | |
29 | #include "hw/pci/msi.h" | |
30 | #include "hw/s390x/adapter.h" | |
31 | #include "exec/gdbstub.h" | |
32 | #include "sysemu/kvm_int.h" | |
33 | #include "qemu/bswap.h" | |
34 | #include "exec/memory.h" | |
35 | #include "exec/ram_addr.h" | |
36 | #include "exec/address-spaces.h" | |
37 | #include "qemu/event_notifier.h" | |
38 | #include "trace.h" | |
39 | #include "hw/irq.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 KVM_COALESCED_MMIO_MAX. We | |
49 | * need to use the real host PAGE_SIZE, as that's what KVM will use. | |
50 | */ | |
51 | #define PAGE_SIZE getpagesize() | |
52 | ||
53 | //#define DEBUG_KVM | |
54 | ||
55 | #ifdef DEBUG_KVM | |
56 | #define DPRINTF(fmt, ...) \ | |
57 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
58 | #else | |
59 | #define DPRINTF(fmt, ...) \ | |
60 | do { } while (0) | |
61 | #endif | |
62 | ||
63 | #define KVM_MSI_HASHTAB_SIZE 256 | |
64 | ||
65 | struct KVMState | |
66 | { | |
67 | AccelState parent_obj; | |
68 | ||
69 | int nr_slots; | |
70 | int fd; | |
71 | int vmfd; | |
72 | int coalesced_mmio; | |
73 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; | |
74 | bool coalesced_flush_in_progress; | |
75 | int broken_set_mem_region; | |
76 | int vcpu_events; | |
77 | int robust_singlestep; | |
78 | int debugregs; | |
79 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
80 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; | |
81 | #endif | |
82 | int many_ioeventfds; | |
83 | int intx_set_mask; | |
84 | /* The man page (and posix) say ioctl numbers are signed int, but | |
85 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
86 | * unsigned, and treating them as signed here can break things */ | |
87 | unsigned irq_set_ioctl; | |
88 | unsigned int sigmask_len; | |
89 | GHashTable *gsimap; | |
90 | #ifdef KVM_CAP_IRQ_ROUTING | |
91 | struct kvm_irq_routing *irq_routes; | |
92 | int nr_allocated_irq_routes; | |
93 | uint32_t *used_gsi_bitmap; | |
94 | unsigned int gsi_count; | |
95 | QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; | |
96 | #endif | |
97 | KVMMemoryListener memory_listener; | |
98 | }; | |
99 | ||
100 | KVMState *kvm_state; | |
101 | bool kvm_kernel_irqchip; | |
102 | bool kvm_split_irqchip; | |
103 | bool kvm_async_interrupts_allowed; | |
104 | bool kvm_halt_in_kernel_allowed; | |
105 | bool kvm_eventfds_allowed; | |
106 | bool kvm_irqfds_allowed; | |
107 | bool kvm_resamplefds_allowed; | |
108 | bool kvm_msi_via_irqfd_allowed; | |
109 | bool kvm_gsi_routing_allowed; | |
110 | bool kvm_gsi_direct_mapping; | |
111 | bool kvm_allowed; | |
112 | bool kvm_readonly_mem_allowed; | |
113 | bool kvm_vm_attributes_allowed; | |
114 | bool kvm_direct_msi_allowed; | |
115 | bool kvm_ioeventfd_any_length_allowed; | |
116 | ||
117 | static const KVMCapabilityInfo kvm_required_capabilites[] = { | |
118 | KVM_CAP_INFO(USER_MEMORY), | |
119 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
120 | KVM_CAP_LAST_INFO | |
121 | }; | |
122 | ||
123 | static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml) | |
124 | { | |
125 | KVMState *s = kvm_state; | |
126 | int i; | |
127 | ||
128 | for (i = 0; i < s->nr_slots; i++) { | |
129 | if (kml->slots[i].memory_size == 0) { | |
130 | return &kml->slots[i]; | |
131 | } | |
132 | } | |
133 | ||
134 | return NULL; | |
135 | } | |
136 | ||
137 | bool kvm_has_free_slot(MachineState *ms) | |
138 | { | |
139 | KVMState *s = KVM_STATE(ms->accelerator); | |
140 | ||
141 | return kvm_get_free_slot(&s->memory_listener); | |
142 | } | |
143 | ||
144 | static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml) | |
145 | { | |
146 | KVMSlot *slot = kvm_get_free_slot(kml); | |
147 | ||
148 | if (slot) { | |
149 | return slot; | |
150 | } | |
151 | ||
152 | fprintf(stderr, "%s: no free slot available\n", __func__); | |
153 | abort(); | |
154 | } | |
155 | ||
156 | static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml, | |
157 | hwaddr start_addr, | |
158 | hwaddr end_addr) | |
159 | { | |
160 | KVMState *s = kvm_state; | |
161 | int i; | |
162 | ||
163 | for (i = 0; i < s->nr_slots; i++) { | |
164 | KVMSlot *mem = &kml->slots[i]; | |
165 | ||
166 | if (start_addr == mem->start_addr && | |
167 | end_addr == mem->start_addr + mem->memory_size) { | |
168 | return mem; | |
169 | } | |
170 | } | |
171 | ||
172 | return NULL; | |
173 | } | |
174 | ||
175 | /* | |
176 | * Find overlapping slot with lowest start address | |
177 | */ | |
178 | static KVMSlot *kvm_lookup_overlapping_slot(KVMMemoryListener *kml, | |
179 | hwaddr start_addr, | |
180 | hwaddr end_addr) | |
181 | { | |
182 | KVMState *s = kvm_state; | |
183 | KVMSlot *found = NULL; | |
184 | int i; | |
185 | ||
186 | for (i = 0; i < s->nr_slots; i++) { | |
187 | KVMSlot *mem = &kml->slots[i]; | |
188 | ||
189 | if (mem->memory_size == 0 || | |
190 | (found && found->start_addr < mem->start_addr)) { | |
191 | continue; | |
192 | } | |
193 | ||
194 | if (end_addr > mem->start_addr && | |
195 | start_addr < mem->start_addr + mem->memory_size) { | |
196 | found = mem; | |
197 | } | |
198 | } | |
199 | ||
200 | return found; | |
201 | } | |
202 | ||
203 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, | |
204 | hwaddr *phys_addr) | |
205 | { | |
206 | KVMMemoryListener *kml = &s->memory_listener; | |
207 | int i; | |
208 | ||
209 | for (i = 0; i < s->nr_slots; i++) { | |
210 | KVMSlot *mem = &kml->slots[i]; | |
211 | ||
212 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { | |
213 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
214 | return 1; | |
215 | } | |
216 | } | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot) | |
222 | { | |
223 | KVMState *s = kvm_state; | |
224 | struct kvm_userspace_memory_region mem; | |
225 | ||
226 | mem.slot = slot->slot | (kml->as_id << 16); | |
227 | mem.guest_phys_addr = slot->start_addr; | |
228 | mem.userspace_addr = (unsigned long)slot->ram; | |
229 | mem.flags = slot->flags; | |
230 | ||
231 | if (slot->memory_size && mem.flags & KVM_MEM_READONLY) { | |
232 | /* Set the slot size to 0 before setting the slot to the desired | |
233 | * value. This is needed based on KVM commit 75d61fbc. */ | |
234 | mem.memory_size = 0; | |
235 | kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
236 | } | |
237 | mem.memory_size = slot->memory_size; | |
238 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
239 | } | |
240 | ||
241 | int kvm_init_vcpu(CPUState *cpu) | |
242 | { | |
243 | KVMState *s = kvm_state; | |
244 | long mmap_size; | |
245 | int ret; | |
246 | ||
247 | DPRINTF("kvm_init_vcpu\n"); | |
248 | ||
249 | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)kvm_arch_vcpu_id(cpu)); | |
250 | if (ret < 0) { | |
251 | DPRINTF("kvm_create_vcpu failed\n"); | |
252 | goto err; | |
253 | } | |
254 | ||
255 | cpu->kvm_fd = ret; | |
256 | cpu->kvm_state = s; | |
257 | cpu->kvm_vcpu_dirty = true; | |
258 | ||
259 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
260 | if (mmap_size < 0) { | |
261 | ret = mmap_size; | |
262 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
263 | goto err; | |
264 | } | |
265 | ||
266 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
267 | cpu->kvm_fd, 0); | |
268 | if (cpu->kvm_run == MAP_FAILED) { | |
269 | ret = -errno; | |
270 | DPRINTF("mmap'ing vcpu state failed\n"); | |
271 | goto err; | |
272 | } | |
273 | ||
274 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { | |
275 | s->coalesced_mmio_ring = | |
276 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; | |
277 | } | |
278 | ||
279 | ret = kvm_arch_init_vcpu(cpu); | |
280 | err: | |
281 | return ret; | |
282 | } | |
283 | ||
284 | /* | |
285 | * dirty pages logging control | |
286 | */ | |
287 | ||
288 | static int kvm_mem_flags(MemoryRegion *mr) | |
289 | { | |
290 | bool readonly = mr->readonly || memory_region_is_romd(mr); | |
291 | int flags = 0; | |
292 | ||
293 | if (memory_region_get_dirty_log_mask(mr) != 0) { | |
294 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
295 | } | |
296 | if (readonly && kvm_readonly_mem_allowed) { | |
297 | flags |= KVM_MEM_READONLY; | |
298 | } | |
299 | return flags; | |
300 | } | |
301 | ||
302 | static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, | |
303 | MemoryRegion *mr) | |
304 | { | |
305 | int old_flags; | |
306 | ||
307 | old_flags = mem->flags; | |
308 | mem->flags = kvm_mem_flags(mr); | |
309 | ||
310 | /* If nothing changed effectively, no need to issue ioctl */ | |
311 | if (mem->flags == old_flags) { | |
312 | return 0; | |
313 | } | |
314 | ||
315 | return kvm_set_user_memory_region(kml, mem); | |
316 | } | |
317 | ||
318 | static int kvm_section_update_flags(KVMMemoryListener *kml, | |
319 | MemoryRegionSection *section) | |
320 | { | |
321 | hwaddr phys_addr = section->offset_within_address_space; | |
322 | ram_addr_t size = int128_get64(section->size); | |
323 | KVMSlot *mem = kvm_lookup_matching_slot(kml, phys_addr, phys_addr + size); | |
324 | ||
325 | if (mem == NULL) { | |
326 | return 0; | |
327 | } else { | |
328 | return kvm_slot_update_flags(kml, mem, section->mr); | |
329 | } | |
330 | } | |
331 | ||
332 | static void kvm_log_start(MemoryListener *listener, | |
333 | MemoryRegionSection *section, | |
334 | int old, int new) | |
335 | { | |
336 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
337 | int r; | |
338 | ||
339 | if (old != 0) { | |
340 | return; | |
341 | } | |
342 | ||
343 | r = kvm_section_update_flags(kml, section); | |
344 | if (r < 0) { | |
345 | abort(); | |
346 | } | |
347 | } | |
348 | ||
349 | static void kvm_log_stop(MemoryListener *listener, | |
350 | MemoryRegionSection *section, | |
351 | int old, int new) | |
352 | { | |
353 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
354 | int r; | |
355 | ||
356 | if (new != 0) { | |
357 | return; | |
358 | } | |
359 | ||
360 | r = kvm_section_update_flags(kml, section); | |
361 | if (r < 0) { | |
362 | abort(); | |
363 | } | |
364 | } | |
365 | ||
366 | /* get kvm's dirty pages bitmap and update qemu's */ | |
367 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, | |
368 | unsigned long *bitmap) | |
369 | { | |
370 | ram_addr_t start = section->offset_within_region + section->mr->ram_addr; | |
371 | ram_addr_t pages = int128_get64(section->size) / getpagesize(); | |
372 | ||
373 | cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); | |
374 | return 0; | |
375 | } | |
376 | ||
377 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) | |
378 | ||
379 | /** | |
380 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
381 | * This function updates qemu's dirty bitmap using | |
382 | * memory_region_set_dirty(). This means all bits are set | |
383 | * to dirty. | |
384 | * | |
385 | * @start_add: start of logged region. | |
386 | * @end_addr: end of logged region. | |
387 | */ | |
388 | static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, | |
389 | MemoryRegionSection *section) | |
390 | { | |
391 | KVMState *s = kvm_state; | |
392 | unsigned long size, allocated_size = 0; | |
393 | struct kvm_dirty_log d = {}; | |
394 | KVMSlot *mem; | |
395 | int ret = 0; | |
396 | hwaddr start_addr = section->offset_within_address_space; | |
397 | hwaddr end_addr = start_addr + int128_get64(section->size); | |
398 | ||
399 | d.dirty_bitmap = NULL; | |
400 | while (start_addr < end_addr) { | |
401 | mem = kvm_lookup_overlapping_slot(kml, start_addr, end_addr); | |
402 | if (mem == NULL) { | |
403 | break; | |
404 | } | |
405 | ||
406 | /* XXX bad kernel interface alert | |
407 | * For dirty bitmap, kernel allocates array of size aligned to | |
408 | * bits-per-long. But for case when the kernel is 64bits and | |
409 | * the userspace is 32bits, userspace can't align to the same | |
410 | * bits-per-long, since sizeof(long) is different between kernel | |
411 | * and user space. This way, userspace will provide buffer which | |
412 | * may be 4 bytes less than the kernel will use, resulting in | |
413 | * userspace memory corruption (which is not detectable by valgrind | |
414 | * too, in most cases). | |
415 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
416 | * a hope that sizeof(long) wont become >8 any time soon. | |
417 | */ | |
418 | size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
419 | /*HOST_LONG_BITS*/ 64) / 8; | |
420 | if (!d.dirty_bitmap) { | |
421 | d.dirty_bitmap = g_malloc(size); | |
422 | } else if (size > allocated_size) { | |
423 | d.dirty_bitmap = g_realloc(d.dirty_bitmap, size); | |
424 | } | |
425 | allocated_size = size; | |
426 | memset(d.dirty_bitmap, 0, allocated_size); | |
427 | ||
428 | d.slot = mem->slot | (kml->as_id << 16); | |
429 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { | |
430 | DPRINTF("ioctl failed %d\n", errno); | |
431 | ret = -1; | |
432 | break; | |
433 | } | |
434 | ||
435 | kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); | |
436 | start_addr = mem->start_addr + mem->memory_size; | |
437 | } | |
438 | g_free(d.dirty_bitmap); | |
439 | ||
440 | return ret; | |
441 | } | |
442 | ||
443 | static void kvm_coalesce_mmio_region(MemoryListener *listener, | |
444 | MemoryRegionSection *secion, | |
445 | hwaddr start, hwaddr size) | |
446 | { | |
447 | KVMState *s = kvm_state; | |
448 | ||
449 | if (s->coalesced_mmio) { | |
450 | struct kvm_coalesced_mmio_zone zone; | |
451 | ||
452 | zone.addr = start; | |
453 | zone.size = size; | |
454 | zone.pad = 0; | |
455 | ||
456 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
457 | } | |
458 | } | |
459 | ||
460 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, | |
461 | MemoryRegionSection *secion, | |
462 | hwaddr start, hwaddr size) | |
463 | { | |
464 | KVMState *s = kvm_state; | |
465 | ||
466 | if (s->coalesced_mmio) { | |
467 | struct kvm_coalesced_mmio_zone zone; | |
468 | ||
469 | zone.addr = start; | |
470 | zone.size = size; | |
471 | zone.pad = 0; | |
472 | ||
473 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
474 | } | |
475 | } | |
476 | ||
477 | int kvm_check_extension(KVMState *s, unsigned int extension) | |
478 | { | |
479 | int ret; | |
480 | ||
481 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
482 | if (ret < 0) { | |
483 | ret = 0; | |
484 | } | |
485 | ||
486 | return ret; | |
487 | } | |
488 | ||
489 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) | |
490 | { | |
491 | int ret; | |
492 | ||
493 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
494 | if (ret < 0) { | |
495 | /* VM wide version not implemented, use global one instead */ | |
496 | ret = kvm_check_extension(s, extension); | |
497 | } | |
498 | ||
499 | return ret; | |
500 | } | |
501 | ||
502 | static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) | |
503 | { | |
504 | #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) | |
505 | /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN | |
506 | * endianness, but the memory core hands them in target endianness. | |
507 | * For example, PPC is always treated as big-endian even if running | |
508 | * on KVM and on PPC64LE. Correct here. | |
509 | */ | |
510 | switch (size) { | |
511 | case 2: | |
512 | val = bswap16(val); | |
513 | break; | |
514 | case 4: | |
515 | val = bswap32(val); | |
516 | break; | |
517 | } | |
518 | #endif | |
519 | return val; | |
520 | } | |
521 | ||
522 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, | |
523 | bool assign, uint32_t size, bool datamatch) | |
524 | { | |
525 | int ret; | |
526 | struct kvm_ioeventfd iofd = { | |
527 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
528 | .addr = addr, | |
529 | .len = size, | |
530 | .flags = 0, | |
531 | .fd = fd, | |
532 | }; | |
533 | ||
534 | if (!kvm_enabled()) { | |
535 | return -ENOSYS; | |
536 | } | |
537 | ||
538 | if (datamatch) { | |
539 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
540 | } | |
541 | if (!assign) { | |
542 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
543 | } | |
544 | ||
545 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
546 | ||
547 | if (ret < 0) { | |
548 | return -errno; | |
549 | } | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, | |
555 | bool assign, uint32_t size, bool datamatch) | |
556 | { | |
557 | struct kvm_ioeventfd kick = { | |
558 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
559 | .addr = addr, | |
560 | .flags = KVM_IOEVENTFD_FLAG_PIO, | |
561 | .len = size, | |
562 | .fd = fd, | |
563 | }; | |
564 | int r; | |
565 | if (!kvm_enabled()) { | |
566 | return -ENOSYS; | |
567 | } | |
568 | if (datamatch) { | |
569 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
570 | } | |
571 | if (!assign) { | |
572 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
573 | } | |
574 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
575 | if (r < 0) { | |
576 | return r; | |
577 | } | |
578 | return 0; | |
579 | } | |
580 | ||
581 | ||
582 | static int kvm_check_many_ioeventfds(void) | |
583 | { | |
584 | /* Userspace can use ioeventfd for io notification. This requires a host | |
585 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
586 | * support SIGIO it cannot interrupt the vcpu. | |
587 | * | |
588 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
589 | * can avoid creating too many ioeventfds. | |
590 | */ | |
591 | #if defined(CONFIG_EVENTFD) | |
592 | int ioeventfds[7]; | |
593 | int i, ret = 0; | |
594 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
595 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
596 | if (ioeventfds[i] < 0) { | |
597 | break; | |
598 | } | |
599 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); | |
600 | if (ret < 0) { | |
601 | close(ioeventfds[i]); | |
602 | break; | |
603 | } | |
604 | } | |
605 | ||
606 | /* Decide whether many devices are supported or not */ | |
607 | ret = i == ARRAY_SIZE(ioeventfds); | |
608 | ||
609 | while (i-- > 0) { | |
610 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); | |
611 | close(ioeventfds[i]); | |
612 | } | |
613 | return ret; | |
614 | #else | |
615 | return 0; | |
616 | #endif | |
617 | } | |
618 | ||
619 | static const KVMCapabilityInfo * | |
620 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
621 | { | |
622 | while (list->name) { | |
623 | if (!kvm_check_extension(s, list->value)) { | |
624 | return list; | |
625 | } | |
626 | list++; | |
627 | } | |
628 | return NULL; | |
629 | } | |
630 | ||
631 | static void kvm_set_phys_mem(KVMMemoryListener *kml, | |
632 | MemoryRegionSection *section, bool add) | |
633 | { | |
634 | KVMState *s = kvm_state; | |
635 | KVMSlot *mem, old; | |
636 | int err; | |
637 | MemoryRegion *mr = section->mr; | |
638 | bool writeable = !mr->readonly && !mr->rom_device; | |
639 | hwaddr start_addr = section->offset_within_address_space; | |
640 | ram_addr_t size = int128_get64(section->size); | |
641 | void *ram = NULL; | |
642 | unsigned delta; | |
643 | ||
644 | /* kvm works in page size chunks, but the function may be called | |
645 | with sub-page size and unaligned start address. Pad the start | |
646 | address to next and truncate size to previous page boundary. */ | |
647 | delta = qemu_real_host_page_size - (start_addr & ~qemu_real_host_page_mask); | |
648 | delta &= ~qemu_real_host_page_mask; | |
649 | if (delta > size) { | |
650 | return; | |
651 | } | |
652 | start_addr += delta; | |
653 | size -= delta; | |
654 | size &= qemu_real_host_page_mask; | |
655 | if (!size || (start_addr & ~qemu_real_host_page_mask)) { | |
656 | return; | |
657 | } | |
658 | ||
659 | if (!memory_region_is_ram(mr)) { | |
660 | if (writeable || !kvm_readonly_mem_allowed) { | |
661 | return; | |
662 | } else if (!mr->romd_mode) { | |
663 | /* If the memory device is not in romd_mode, then we actually want | |
664 | * to remove the kvm memory slot so all accesses will trap. */ | |
665 | add = false; | |
666 | } | |
667 | } | |
668 | ||
669 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta; | |
670 | ||
671 | while (1) { | |
672 | mem = kvm_lookup_overlapping_slot(kml, start_addr, start_addr + size); | |
673 | if (!mem) { | |
674 | break; | |
675 | } | |
676 | ||
677 | if (add && start_addr >= mem->start_addr && | |
678 | (start_addr + size <= mem->start_addr + mem->memory_size) && | |
679 | (ram - start_addr == mem->ram - mem->start_addr)) { | |
680 | /* The new slot fits into the existing one and comes with | |
681 | * identical parameters - update flags and done. */ | |
682 | kvm_slot_update_flags(kml, mem, mr); | |
683 | return; | |
684 | } | |
685 | ||
686 | old = *mem; | |
687 | ||
688 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
689 | kvm_physical_sync_dirty_bitmap(kml, section); | |
690 | } | |
691 | ||
692 | /* unregister the overlapping slot */ | |
693 | mem->memory_size = 0; | |
694 | err = kvm_set_user_memory_region(kml, mem); | |
695 | if (err) { | |
696 | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n", | |
697 | __func__, strerror(-err)); | |
698 | abort(); | |
699 | } | |
700 | ||
701 | /* Workaround for older KVM versions: we can't join slots, even not by | |
702 | * unregistering the previous ones and then registering the larger | |
703 | * slot. We have to maintain the existing fragmentation. Sigh. | |
704 | * | |
705 | * This workaround assumes that the new slot starts at the same | |
706 | * address as the first existing one. If not or if some overlapping | |
707 | * slot comes around later, we will fail (not seen in practice so far) | |
708 | * - and actually require a recent KVM version. */ | |
709 | if (s->broken_set_mem_region && | |
710 | old.start_addr == start_addr && old.memory_size < size && add) { | |
711 | mem = kvm_alloc_slot(kml); | |
712 | mem->memory_size = old.memory_size; | |
713 | mem->start_addr = old.start_addr; | |
714 | mem->ram = old.ram; | |
715 | mem->flags = kvm_mem_flags(mr); | |
716 | ||
717 | err = kvm_set_user_memory_region(kml, mem); | |
718 | if (err) { | |
719 | fprintf(stderr, "%s: error updating slot: %s\n", __func__, | |
720 | strerror(-err)); | |
721 | abort(); | |
722 | } | |
723 | ||
724 | start_addr += old.memory_size; | |
725 | ram += old.memory_size; | |
726 | size -= old.memory_size; | |
727 | continue; | |
728 | } | |
729 | ||
730 | /* register prefix slot */ | |
731 | if (old.start_addr < start_addr) { | |
732 | mem = kvm_alloc_slot(kml); | |
733 | mem->memory_size = start_addr - old.start_addr; | |
734 | mem->start_addr = old.start_addr; | |
735 | mem->ram = old.ram; | |
736 | mem->flags = kvm_mem_flags(mr); | |
737 | ||
738 | err = kvm_set_user_memory_region(kml, mem); | |
739 | if (err) { | |
740 | fprintf(stderr, "%s: error registering prefix slot: %s\n", | |
741 | __func__, strerror(-err)); | |
742 | #ifdef TARGET_PPC | |
743 | fprintf(stderr, "%s: This is probably because your kernel's " \ | |
744 | "PAGE_SIZE is too big. Please try to use 4k " \ | |
745 | "PAGE_SIZE!\n", __func__); | |
746 | #endif | |
747 | abort(); | |
748 | } | |
749 | } | |
750 | ||
751 | /* register suffix slot */ | |
752 | if (old.start_addr + old.memory_size > start_addr + size) { | |
753 | ram_addr_t size_delta; | |
754 | ||
755 | mem = kvm_alloc_slot(kml); | |
756 | mem->start_addr = start_addr + size; | |
757 | size_delta = mem->start_addr - old.start_addr; | |
758 | mem->memory_size = old.memory_size - size_delta; | |
759 | mem->ram = old.ram + size_delta; | |
760 | mem->flags = kvm_mem_flags(mr); | |
761 | ||
762 | err = kvm_set_user_memory_region(kml, mem); | |
763 | if (err) { | |
764 | fprintf(stderr, "%s: error registering suffix slot: %s\n", | |
765 | __func__, strerror(-err)); | |
766 | abort(); | |
767 | } | |
768 | } | |
769 | } | |
770 | ||
771 | /* in case the KVM bug workaround already "consumed" the new slot */ | |
772 | if (!size) { | |
773 | return; | |
774 | } | |
775 | if (!add) { | |
776 | return; | |
777 | } | |
778 | mem = kvm_alloc_slot(kml); | |
779 | mem->memory_size = size; | |
780 | mem->start_addr = start_addr; | |
781 | mem->ram = ram; | |
782 | mem->flags = kvm_mem_flags(mr); | |
783 | ||
784 | err = kvm_set_user_memory_region(kml, mem); | |
785 | if (err) { | |
786 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
787 | strerror(-err)); | |
788 | abort(); | |
789 | } | |
790 | } | |
791 | ||
792 | static void kvm_region_add(MemoryListener *listener, | |
793 | MemoryRegionSection *section) | |
794 | { | |
795 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
796 | ||
797 | memory_region_ref(section->mr); | |
798 | kvm_set_phys_mem(kml, section, true); | |
799 | } | |
800 | ||
801 | static void kvm_region_del(MemoryListener *listener, | |
802 | MemoryRegionSection *section) | |
803 | { | |
804 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
805 | ||
806 | kvm_set_phys_mem(kml, section, false); | |
807 | memory_region_unref(section->mr); | |
808 | } | |
809 | ||
810 | static void kvm_log_sync(MemoryListener *listener, | |
811 | MemoryRegionSection *section) | |
812 | { | |
813 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
814 | int r; | |
815 | ||
816 | r = kvm_physical_sync_dirty_bitmap(kml, section); | |
817 | if (r < 0) { | |
818 | abort(); | |
819 | } | |
820 | } | |
821 | ||
822 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, | |
823 | MemoryRegionSection *section, | |
824 | bool match_data, uint64_t data, | |
825 | EventNotifier *e) | |
826 | { | |
827 | int fd = event_notifier_get_fd(e); | |
828 | int r; | |
829 | ||
830 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, | |
831 | data, true, int128_get64(section->size), | |
832 | match_data); | |
833 | if (r < 0) { | |
834 | fprintf(stderr, "%s: error adding ioeventfd: %s\n", | |
835 | __func__, strerror(-r)); | |
836 | abort(); | |
837 | } | |
838 | } | |
839 | ||
840 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, | |
841 | MemoryRegionSection *section, | |
842 | bool match_data, uint64_t data, | |
843 | EventNotifier *e) | |
844 | { | |
845 | int fd = event_notifier_get_fd(e); | |
846 | int r; | |
847 | ||
848 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, | |
849 | data, false, int128_get64(section->size), | |
850 | match_data); | |
851 | if (r < 0) { | |
852 | abort(); | |
853 | } | |
854 | } | |
855 | ||
856 | static void kvm_io_ioeventfd_add(MemoryListener *listener, | |
857 | MemoryRegionSection *section, | |
858 | bool match_data, uint64_t data, | |
859 | EventNotifier *e) | |
860 | { | |
861 | int fd = event_notifier_get_fd(e); | |
862 | int r; | |
863 | ||
864 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, | |
865 | data, true, int128_get64(section->size), | |
866 | match_data); | |
867 | if (r < 0) { | |
868 | fprintf(stderr, "%s: error adding ioeventfd: %s\n", | |
869 | __func__, strerror(-r)); | |
870 | abort(); | |
871 | } | |
872 | } | |
873 | ||
874 | static void kvm_io_ioeventfd_del(MemoryListener *listener, | |
875 | MemoryRegionSection *section, | |
876 | bool match_data, uint64_t data, | |
877 | EventNotifier *e) | |
878 | ||
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, false, int128_get64(section->size), | |
885 | match_data); | |
886 | if (r < 0) { | |
887 | abort(); | |
888 | } | |
889 | } | |
890 | ||
891 | void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, | |
892 | AddressSpace *as, int as_id) | |
893 | { | |
894 | int i; | |
895 | ||
896 | kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); | |
897 | kml->as_id = as_id; | |
898 | ||
899 | for (i = 0; i < s->nr_slots; i++) { | |
900 | kml->slots[i].slot = i; | |
901 | } | |
902 | ||
903 | kml->listener.region_add = kvm_region_add; | |
904 | kml->listener.region_del = kvm_region_del; | |
905 | kml->listener.log_start = kvm_log_start; | |
906 | kml->listener.log_stop = kvm_log_stop; | |
907 | kml->listener.log_sync = kvm_log_sync; | |
908 | kml->listener.priority = 10; | |
909 | ||
910 | memory_listener_register(&kml->listener, as); | |
911 | } | |
912 | ||
913 | static MemoryListener kvm_io_listener = { | |
914 | .eventfd_add = kvm_io_ioeventfd_add, | |
915 | .eventfd_del = kvm_io_ioeventfd_del, | |
916 | .priority = 10, | |
917 | }; | |
918 | ||
919 | static void kvm_handle_interrupt(CPUState *cpu, int mask) | |
920 | { | |
921 | cpu->interrupt_request |= mask; | |
922 | ||
923 | if (!qemu_cpu_is_self(cpu)) { | |
924 | qemu_cpu_kick(cpu); | |
925 | } | |
926 | } | |
927 | ||
928 | int kvm_set_irq(KVMState *s, int irq, int level) | |
929 | { | |
930 | struct kvm_irq_level event; | |
931 | int ret; | |
932 | ||
933 | assert(kvm_async_interrupts_enabled()); | |
934 | ||
935 | event.level = level; | |
936 | event.irq = irq; | |
937 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); | |
938 | if (ret < 0) { | |
939 | perror("kvm_set_irq"); | |
940 | abort(); | |
941 | } | |
942 | ||
943 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; | |
944 | } | |
945 | ||
946 | #ifdef KVM_CAP_IRQ_ROUTING | |
947 | typedef struct KVMMSIRoute { | |
948 | struct kvm_irq_routing_entry kroute; | |
949 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
950 | } KVMMSIRoute; | |
951 | ||
952 | static void set_gsi(KVMState *s, unsigned int gsi) | |
953 | { | |
954 | s->used_gsi_bitmap[gsi / 32] |= 1U << (gsi % 32); | |
955 | } | |
956 | ||
957 | static void clear_gsi(KVMState *s, unsigned int gsi) | |
958 | { | |
959 | s->used_gsi_bitmap[gsi / 32] &= ~(1U << (gsi % 32)); | |
960 | } | |
961 | ||
962 | void kvm_init_irq_routing(KVMState *s) | |
963 | { | |
964 | int gsi_count, i; | |
965 | ||
966 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; | |
967 | if (gsi_count > 0) { | |
968 | unsigned int gsi_bits, i; | |
969 | ||
970 | /* Round up so we can search ints using ffs */ | |
971 | gsi_bits = ALIGN(gsi_count, 32); | |
972 | s->used_gsi_bitmap = g_malloc0(gsi_bits / 8); | |
973 | s->gsi_count = gsi_count; | |
974 | ||
975 | /* Mark any over-allocated bits as already in use */ | |
976 | for (i = gsi_count; i < gsi_bits; i++) { | |
977 | set_gsi(s, i); | |
978 | } | |
979 | } | |
980 | ||
981 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
982 | s->nr_allocated_irq_routes = 0; | |
983 | ||
984 | if (!kvm_direct_msi_allowed) { | |
985 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { | |
986 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
987 | } | |
988 | } | |
989 | ||
990 | kvm_arch_init_irq_routing(s); | |
991 | } | |
992 | ||
993 | void kvm_irqchip_commit_routes(KVMState *s) | |
994 | { | |
995 | int ret; | |
996 | ||
997 | s->irq_routes->flags = 0; | |
998 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); | |
999 | assert(ret == 0); | |
1000 | } | |
1001 | ||
1002 | static void kvm_add_routing_entry(KVMState *s, | |
1003 | struct kvm_irq_routing_entry *entry) | |
1004 | { | |
1005 | struct kvm_irq_routing_entry *new; | |
1006 | int n, size; | |
1007 | ||
1008 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
1009 | n = s->nr_allocated_irq_routes * 2; | |
1010 | if (n < 64) { | |
1011 | n = 64; | |
1012 | } | |
1013 | size = sizeof(struct kvm_irq_routing); | |
1014 | size += n * sizeof(*new); | |
1015 | s->irq_routes = g_realloc(s->irq_routes, size); | |
1016 | s->nr_allocated_irq_routes = n; | |
1017 | } | |
1018 | n = s->irq_routes->nr++; | |
1019 | new = &s->irq_routes->entries[n]; | |
1020 | ||
1021 | *new = *entry; | |
1022 | ||
1023 | set_gsi(s, entry->gsi); | |
1024 | } | |
1025 | ||
1026 | static int kvm_update_routing_entry(KVMState *s, | |
1027 | struct kvm_irq_routing_entry *new_entry) | |
1028 | { | |
1029 | struct kvm_irq_routing_entry *entry; | |
1030 | int n; | |
1031 | ||
1032 | for (n = 0; n < s->irq_routes->nr; n++) { | |
1033 | entry = &s->irq_routes->entries[n]; | |
1034 | if (entry->gsi != new_entry->gsi) { | |
1035 | continue; | |
1036 | } | |
1037 | ||
1038 | if(!memcmp(entry, new_entry, sizeof *entry)) { | |
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | *entry = *new_entry; | |
1043 | ||
1044 | kvm_irqchip_commit_routes(s); | |
1045 | ||
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | return -ESRCH; | |
1050 | } | |
1051 | ||
1052 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) | |
1053 | { | |
1054 | struct kvm_irq_routing_entry e = {}; | |
1055 | ||
1056 | assert(pin < s->gsi_count); | |
1057 | ||
1058 | e.gsi = irq; | |
1059 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1060 | e.flags = 0; | |
1061 | e.u.irqchip.irqchip = irqchip; | |
1062 | e.u.irqchip.pin = pin; | |
1063 | kvm_add_routing_entry(s, &e); | |
1064 | } | |
1065 | ||
1066 | void kvm_irqchip_release_virq(KVMState *s, int virq) | |
1067 | { | |
1068 | struct kvm_irq_routing_entry *e; | |
1069 | int i; | |
1070 | ||
1071 | if (kvm_gsi_direct_mapping()) { | |
1072 | return; | |
1073 | } | |
1074 | ||
1075 | for (i = 0; i < s->irq_routes->nr; i++) { | |
1076 | e = &s->irq_routes->entries[i]; | |
1077 | if (e->gsi == virq) { | |
1078 | s->irq_routes->nr--; | |
1079 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1080 | } | |
1081 | } | |
1082 | clear_gsi(s, virq); | |
1083 | } | |
1084 | ||
1085 | static unsigned int kvm_hash_msi(uint32_t data) | |
1086 | { | |
1087 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1088 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1089 | return data & 0xff; | |
1090 | } | |
1091 | ||
1092 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1093 | { | |
1094 | KVMMSIRoute *route, *next; | |
1095 | unsigned int hash; | |
1096 | ||
1097 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1098 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1099 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1100 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1101 | g_free(route); | |
1102 | } | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | static int kvm_irqchip_get_virq(KVMState *s) | |
1107 | { | |
1108 | uint32_t *word = s->used_gsi_bitmap; | |
1109 | int max_words = ALIGN(s->gsi_count, 32) / 32; | |
1110 | int i, zeroes; | |
1111 | ||
1112 | /* | |
1113 | * PIC and IOAPIC share the first 16 GSI numbers, thus the available | |
1114 | * GSI numbers are more than the number of IRQ route. Allocating a GSI | |
1115 | * number can succeed even though a new route entry cannot be added. | |
1116 | * When this happens, flush dynamic MSI entries to free IRQ route entries. | |
1117 | */ | |
1118 | if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) { | |
1119 | kvm_flush_dynamic_msi_routes(s); | |
1120 | } | |
1121 | ||
1122 | /* Return the lowest unused GSI in the bitmap */ | |
1123 | for (i = 0; i < max_words; i++) { | |
1124 | zeroes = ctz32(~word[i]); | |
1125 | if (zeroes == 32) { | |
1126 | continue; | |
1127 | } | |
1128 | ||
1129 | return zeroes + i * 32; | |
1130 | } | |
1131 | return -ENOSPC; | |
1132 | ||
1133 | } | |
1134 | ||
1135 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1136 | { | |
1137 | unsigned int hash = kvm_hash_msi(msg.data); | |
1138 | KVMMSIRoute *route; | |
1139 | ||
1140 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1141 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1142 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
1143 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { | |
1144 | return route; | |
1145 | } | |
1146 | } | |
1147 | return NULL; | |
1148 | } | |
1149 | ||
1150 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1151 | { | |
1152 | struct kvm_msi msi; | |
1153 | KVMMSIRoute *route; | |
1154 | ||
1155 | if (kvm_direct_msi_allowed) { | |
1156 | msi.address_lo = (uint32_t)msg.address; | |
1157 | msi.address_hi = msg.address >> 32; | |
1158 | msi.data = le32_to_cpu(msg.data); | |
1159 | msi.flags = 0; | |
1160 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1161 | ||
1162 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1163 | } | |
1164 | ||
1165 | route = kvm_lookup_msi_route(s, msg); | |
1166 | if (!route) { | |
1167 | int virq; | |
1168 | ||
1169 | virq = kvm_irqchip_get_virq(s); | |
1170 | if (virq < 0) { | |
1171 | return virq; | |
1172 | } | |
1173 | ||
1174 | route = g_malloc0(sizeof(KVMMSIRoute)); | |
1175 | route->kroute.gsi = virq; | |
1176 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1177 | route->kroute.flags = 0; | |
1178 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1179 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
1180 | route->kroute.u.msi.data = le32_to_cpu(msg.data); | |
1181 | ||
1182 | kvm_add_routing_entry(s, &route->kroute); | |
1183 | kvm_irqchip_commit_routes(s); | |
1184 | ||
1185 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1186 | entry); | |
1187 | } | |
1188 | ||
1189 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1190 | ||
1191 | return kvm_set_irq(s, route->kroute.gsi, 1); | |
1192 | } | |
1193 | ||
1194 | int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg, PCIDevice *dev) | |
1195 | { | |
1196 | struct kvm_irq_routing_entry kroute = {}; | |
1197 | int virq; | |
1198 | ||
1199 | if (kvm_gsi_direct_mapping()) { | |
1200 | return kvm_arch_msi_data_to_gsi(msg.data); | |
1201 | } | |
1202 | ||
1203 | if (!kvm_gsi_routing_enabled()) { | |
1204 | return -ENOSYS; | |
1205 | } | |
1206 | ||
1207 | virq = kvm_irqchip_get_virq(s); | |
1208 | if (virq < 0) { | |
1209 | return virq; | |
1210 | } | |
1211 | ||
1212 | kroute.gsi = virq; | |
1213 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1214 | kroute.flags = 0; | |
1215 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1216 | kroute.u.msi.address_hi = msg.address >> 32; | |
1217 | kroute.u.msi.data = le32_to_cpu(msg.data); | |
1218 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { | |
1219 | kvm_irqchip_release_virq(s, virq); | |
1220 | return -EINVAL; | |
1221 | } | |
1222 | ||
1223 | kvm_add_routing_entry(s, &kroute); | |
1224 | kvm_irqchip_commit_routes(s); | |
1225 | ||
1226 | return virq; | |
1227 | } | |
1228 | ||
1229 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, | |
1230 | PCIDevice *dev) | |
1231 | { | |
1232 | struct kvm_irq_routing_entry kroute = {}; | |
1233 | ||
1234 | if (kvm_gsi_direct_mapping()) { | |
1235 | return 0; | |
1236 | } | |
1237 | ||
1238 | if (!kvm_irqchip_in_kernel()) { | |
1239 | return -ENOSYS; | |
1240 | } | |
1241 | ||
1242 | kroute.gsi = virq; | |
1243 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1244 | kroute.flags = 0; | |
1245 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1246 | kroute.u.msi.address_hi = msg.address >> 32; | |
1247 | kroute.u.msi.data = le32_to_cpu(msg.data); | |
1248 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { | |
1249 | return -EINVAL; | |
1250 | } | |
1251 | ||
1252 | return kvm_update_routing_entry(s, &kroute); | |
1253 | } | |
1254 | ||
1255 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, | |
1256 | bool assign) | |
1257 | { | |
1258 | struct kvm_irqfd irqfd = { | |
1259 | .fd = fd, | |
1260 | .gsi = virq, | |
1261 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
1262 | }; | |
1263 | ||
1264 | if (rfd != -1) { | |
1265 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
1266 | irqfd.resamplefd = rfd; | |
1267 | } | |
1268 | ||
1269 | if (!kvm_irqfds_enabled()) { | |
1270 | return -ENOSYS; | |
1271 | } | |
1272 | ||
1273 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
1274 | } | |
1275 | ||
1276 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) | |
1277 | { | |
1278 | struct kvm_irq_routing_entry kroute = {}; | |
1279 | int virq; | |
1280 | ||
1281 | if (!kvm_gsi_routing_enabled()) { | |
1282 | return -ENOSYS; | |
1283 | } | |
1284 | ||
1285 | virq = kvm_irqchip_get_virq(s); | |
1286 | if (virq < 0) { | |
1287 | return virq; | |
1288 | } | |
1289 | ||
1290 | kroute.gsi = virq; | |
1291 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
1292 | kroute.flags = 0; | |
1293 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
1294 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
1295 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
1296 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
1297 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
1298 | ||
1299 | kvm_add_routing_entry(s, &kroute); | |
1300 | ||
1301 | return virq; | |
1302 | } | |
1303 | ||
1304 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) | |
1305 | { | |
1306 | struct kvm_irq_routing_entry kroute = {}; | |
1307 | int virq; | |
1308 | ||
1309 | if (!kvm_gsi_routing_enabled()) { | |
1310 | return -ENOSYS; | |
1311 | } | |
1312 | if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) { | |
1313 | return -ENOSYS; | |
1314 | } | |
1315 | virq = kvm_irqchip_get_virq(s); | |
1316 | if (virq < 0) { | |
1317 | return virq; | |
1318 | } | |
1319 | ||
1320 | kroute.gsi = virq; | |
1321 | kroute.type = KVM_IRQ_ROUTING_HV_SINT; | |
1322 | kroute.flags = 0; | |
1323 | kroute.u.hv_sint.vcpu = vcpu; | |
1324 | kroute.u.hv_sint.sint = sint; | |
1325 | ||
1326 | kvm_add_routing_entry(s, &kroute); | |
1327 | kvm_irqchip_commit_routes(s); | |
1328 | ||
1329 | return virq; | |
1330 | } | |
1331 | ||
1332 | #else /* !KVM_CAP_IRQ_ROUTING */ | |
1333 | ||
1334 | void kvm_init_irq_routing(KVMState *s) | |
1335 | { | |
1336 | } | |
1337 | ||
1338 | void kvm_irqchip_release_virq(KVMState *s, int virq) | |
1339 | { | |
1340 | } | |
1341 | ||
1342 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1343 | { | |
1344 | abort(); | |
1345 | } | |
1346 | ||
1347 | int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) | |
1348 | { | |
1349 | return -ENOSYS; | |
1350 | } | |
1351 | ||
1352 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) | |
1353 | { | |
1354 | return -ENOSYS; | |
1355 | } | |
1356 | ||
1357 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) | |
1358 | { | |
1359 | return -ENOSYS; | |
1360 | } | |
1361 | ||
1362 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) | |
1363 | { | |
1364 | abort(); | |
1365 | } | |
1366 | ||
1367 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
1368 | { | |
1369 | return -ENOSYS; | |
1370 | } | |
1371 | #endif /* !KVM_CAP_IRQ_ROUTING */ | |
1372 | ||
1373 | int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, | |
1374 | EventNotifier *rn, int virq) | |
1375 | { | |
1376 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), | |
1377 | rn ? event_notifier_get_fd(rn) : -1, virq, true); | |
1378 | } | |
1379 | ||
1380 | int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, | |
1381 | int virq) | |
1382 | { | |
1383 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq, | |
1384 | false); | |
1385 | } | |
1386 | ||
1387 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, | |
1388 | EventNotifier *rn, qemu_irq irq) | |
1389 | { | |
1390 | gpointer key, gsi; | |
1391 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1392 | ||
1393 | if (!found) { | |
1394 | return -ENXIO; | |
1395 | } | |
1396 | return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi)); | |
1397 | } | |
1398 | ||
1399 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, | |
1400 | qemu_irq irq) | |
1401 | { | |
1402 | gpointer key, gsi; | |
1403 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1404 | ||
1405 | if (!found) { | |
1406 | return -ENXIO; | |
1407 | } | |
1408 | return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); | |
1409 | } | |
1410 | ||
1411 | void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) | |
1412 | { | |
1413 | g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); | |
1414 | } | |
1415 | ||
1416 | static void kvm_irqchip_create(MachineState *machine, KVMState *s) | |
1417 | { | |
1418 | int ret; | |
1419 | ||
1420 | if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) { | |
1421 | ; | |
1422 | } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) { | |
1423 | ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0); | |
1424 | if (ret < 0) { | |
1425 | fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret)); | |
1426 | exit(1); | |
1427 | } | |
1428 | } else { | |
1429 | return; | |
1430 | } | |
1431 | ||
1432 | /* First probe and see if there's a arch-specific hook to create the | |
1433 | * in-kernel irqchip for us */ | |
1434 | ret = kvm_arch_irqchip_create(machine, s); | |
1435 | if (ret == 0) { | |
1436 | if (machine_kernel_irqchip_split(machine)) { | |
1437 | perror("Split IRQ chip mode not supported."); | |
1438 | exit(1); | |
1439 | } else { | |
1440 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1441 | } | |
1442 | } | |
1443 | if (ret < 0) { | |
1444 | fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret)); | |
1445 | exit(1); | |
1446 | } | |
1447 | ||
1448 | kvm_kernel_irqchip = true; | |
1449 | /* If we have an in-kernel IRQ chip then we must have asynchronous | |
1450 | * interrupt delivery (though the reverse is not necessarily true) | |
1451 | */ | |
1452 | kvm_async_interrupts_allowed = true; | |
1453 | kvm_halt_in_kernel_allowed = true; | |
1454 | ||
1455 | kvm_init_irq_routing(s); | |
1456 | ||
1457 | s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); | |
1458 | } | |
1459 | ||
1460 | /* Find number of supported CPUs using the recommended | |
1461 | * procedure from the kernel API documentation to cope with | |
1462 | * older kernels that may be missing capabilities. | |
1463 | */ | |
1464 | static int kvm_recommended_vcpus(KVMState *s) | |
1465 | { | |
1466 | int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS); | |
1467 | return (ret) ? ret : 4; | |
1468 | } | |
1469 | ||
1470 | static int kvm_max_vcpus(KVMState *s) | |
1471 | { | |
1472 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
1473 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
1474 | } | |
1475 | ||
1476 | static int kvm_init(MachineState *ms) | |
1477 | { | |
1478 | MachineClass *mc = MACHINE_GET_CLASS(ms); | |
1479 | static const char upgrade_note[] = | |
1480 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1481 | "(see http://sourceforge.net/projects/kvm).\n"; | |
1482 | struct { | |
1483 | const char *name; | |
1484 | int num; | |
1485 | } num_cpus[] = { | |
1486 | { "SMP", smp_cpus }, | |
1487 | { "hotpluggable", max_cpus }, | |
1488 | { NULL, } | |
1489 | }, *nc = num_cpus; | |
1490 | int soft_vcpus_limit, hard_vcpus_limit; | |
1491 | KVMState *s; | |
1492 | const KVMCapabilityInfo *missing_cap; | |
1493 | int ret; | |
1494 | int type = 0; | |
1495 | const char *kvm_type; | |
1496 | ||
1497 | s = KVM_STATE(ms->accelerator); | |
1498 | ||
1499 | /* | |
1500 | * On systems where the kernel can support different base page | |
1501 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
1502 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
1503 | * page size for the system though. | |
1504 | */ | |
1505 | assert(TARGET_PAGE_SIZE <= getpagesize()); | |
1506 | ||
1507 | s->sigmask_len = 8; | |
1508 | ||
1509 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
1510 | QTAILQ_INIT(&s->kvm_sw_breakpoints); | |
1511 | #endif | |
1512 | s->vmfd = -1; | |
1513 | s->fd = qemu_open("/dev/kvm", O_RDWR); | |
1514 | if (s->fd == -1) { | |
1515 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
1516 | ret = -errno; | |
1517 | goto err; | |
1518 | } | |
1519 | ||
1520 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
1521 | if (ret < KVM_API_VERSION) { | |
1522 | if (ret >= 0) { | |
1523 | ret = -EINVAL; | |
1524 | } | |
1525 | fprintf(stderr, "kvm version too old\n"); | |
1526 | goto err; | |
1527 | } | |
1528 | ||
1529 | if (ret > KVM_API_VERSION) { | |
1530 | ret = -EINVAL; | |
1531 | fprintf(stderr, "kvm version not supported\n"); | |
1532 | goto err; | |
1533 | } | |
1534 | ||
1535 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); | |
1536 | ||
1537 | /* If unspecified, use the default value */ | |
1538 | if (!s->nr_slots) { | |
1539 | s->nr_slots = 32; | |
1540 | } | |
1541 | ||
1542 | /* check the vcpu limits */ | |
1543 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
1544 | hard_vcpus_limit = kvm_max_vcpus(s); | |
1545 | ||
1546 | while (nc->name) { | |
1547 | if (nc->num > soft_vcpus_limit) { | |
1548 | fprintf(stderr, | |
1549 | "Warning: Number of %s cpus requested (%d) exceeds " | |
1550 | "the recommended cpus supported by KVM (%d)\n", | |
1551 | nc->name, nc->num, soft_vcpus_limit); | |
1552 | ||
1553 | if (nc->num > hard_vcpus_limit) { | |
1554 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " | |
1555 | "the maximum cpus supported by KVM (%d)\n", | |
1556 | nc->name, nc->num, hard_vcpus_limit); | |
1557 | exit(1); | |
1558 | } | |
1559 | } | |
1560 | nc++; | |
1561 | } | |
1562 | ||
1563 | kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type"); | |
1564 | if (mc->kvm_type) { | |
1565 | type = mc->kvm_type(kvm_type); | |
1566 | } else if (kvm_type) { | |
1567 | ret = -EINVAL; | |
1568 | fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type); | |
1569 | goto err; | |
1570 | } | |
1571 | ||
1572 | do { | |
1573 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); | |
1574 | } while (ret == -EINTR); | |
1575 | ||
1576 | if (ret < 0) { | |
1577 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, | |
1578 | strerror(-ret)); | |
1579 | ||
1580 | #ifdef TARGET_S390X | |
1581 | if (ret == -EINVAL) { | |
1582 | fprintf(stderr, | |
1583 | "Host kernel setup problem detected. Please verify:\n"); | |
1584 | fprintf(stderr, "- for kernels supporting the switch_amode or" | |
1585 | " user_mode parameters, whether\n"); | |
1586 | fprintf(stderr, | |
1587 | " user space is running in primary address space\n"); | |
1588 | fprintf(stderr, | |
1589 | "- for kernels supporting the vm.allocate_pgste sysctl, " | |
1590 | "whether it is enabled\n"); | |
1591 | } | |
1592 | #endif | |
1593 | goto err; | |
1594 | } | |
1595 | ||
1596 | s->vmfd = ret; | |
1597 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); | |
1598 | if (!missing_cap) { | |
1599 | missing_cap = | |
1600 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
1601 | } | |
1602 | if (missing_cap) { | |
1603 | ret = -EINVAL; | |
1604 | fprintf(stderr, "kvm does not support %s\n%s", | |
1605 | missing_cap->name, upgrade_note); | |
1606 | goto err; | |
1607 | } | |
1608 | ||
1609 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); | |
1610 | ||
1611 | s->broken_set_mem_region = 1; | |
1612 | ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); | |
1613 | if (ret > 0) { | |
1614 | s->broken_set_mem_region = 0; | |
1615 | } | |
1616 | ||
1617 | #ifdef KVM_CAP_VCPU_EVENTS | |
1618 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
1619 | #endif | |
1620 | ||
1621 | s->robust_singlestep = | |
1622 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
1623 | ||
1624 | #ifdef KVM_CAP_DEBUGREGS | |
1625 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
1626 | #endif | |
1627 | ||
1628 | #ifdef KVM_CAP_IRQ_ROUTING | |
1629 | kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); | |
1630 | #endif | |
1631 | ||
1632 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); | |
1633 | ||
1634 | s->irq_set_ioctl = KVM_IRQ_LINE; | |
1635 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { | |
1636 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; | |
1637 | } | |
1638 | ||
1639 | #ifdef KVM_CAP_READONLY_MEM | |
1640 | kvm_readonly_mem_allowed = | |
1641 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
1642 | #endif | |
1643 | ||
1644 | kvm_eventfds_allowed = | |
1645 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
1646 | ||
1647 | kvm_irqfds_allowed = | |
1648 | (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); | |
1649 | ||
1650 | kvm_resamplefds_allowed = | |
1651 | (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); | |
1652 | ||
1653 | kvm_vm_attributes_allowed = | |
1654 | (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); | |
1655 | ||
1656 | kvm_ioeventfd_any_length_allowed = | |
1657 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0); | |
1658 | ||
1659 | ret = kvm_arch_init(ms, s); | |
1660 | if (ret < 0) { | |
1661 | goto err; | |
1662 | } | |
1663 | ||
1664 | if (machine_kernel_irqchip_allowed(ms)) { | |
1665 | kvm_irqchip_create(ms, s); | |
1666 | } | |
1667 | ||
1668 | kvm_state = s; | |
1669 | ||
1670 | if (kvm_eventfds_allowed) { | |
1671 | s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; | |
1672 | s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; | |
1673 | } | |
1674 | s->memory_listener.listener.coalesced_mmio_add = kvm_coalesce_mmio_region; | |
1675 | s->memory_listener.listener.coalesced_mmio_del = kvm_uncoalesce_mmio_region; | |
1676 | ||
1677 | kvm_memory_listener_register(s, &s->memory_listener, | |
1678 | &address_space_memory, 0); | |
1679 | memory_listener_register(&kvm_io_listener, | |
1680 | &address_space_io); | |
1681 | ||
1682 | s->many_ioeventfds = kvm_check_many_ioeventfds(); | |
1683 | ||
1684 | cpu_interrupt_handler = kvm_handle_interrupt; | |
1685 | ||
1686 | return 0; | |
1687 | ||
1688 | err: | |
1689 | assert(ret < 0); | |
1690 | if (s->vmfd >= 0) { | |
1691 | close(s->vmfd); | |
1692 | } | |
1693 | if (s->fd != -1) { | |
1694 | close(s->fd); | |
1695 | } | |
1696 | g_free(s->memory_listener.slots); | |
1697 | ||
1698 | return ret; | |
1699 | } | |
1700 | ||
1701 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) | |
1702 | { | |
1703 | s->sigmask_len = sigmask_len; | |
1704 | } | |
1705 | ||
1706 | static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, | |
1707 | int size, uint32_t count) | |
1708 | { | |
1709 | int i; | |
1710 | uint8_t *ptr = data; | |
1711 | ||
1712 | for (i = 0; i < count; i++) { | |
1713 | address_space_rw(&address_space_io, port, attrs, | |
1714 | ptr, size, | |
1715 | direction == KVM_EXIT_IO_OUT); | |
1716 | ptr += size; | |
1717 | } | |
1718 | } | |
1719 | ||
1720 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) | |
1721 | { | |
1722 | fprintf(stderr, "KVM internal error. Suberror: %d\n", | |
1723 | run->internal.suberror); | |
1724 | ||
1725 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { | |
1726 | int i; | |
1727 | ||
1728 | for (i = 0; i < run->internal.ndata; ++i) { | |
1729 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
1730 | i, (uint64_t)run->internal.data[i]); | |
1731 | } | |
1732 | } | |
1733 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { | |
1734 | fprintf(stderr, "emulation failure\n"); | |
1735 | if (!kvm_arch_stop_on_emulation_error(cpu)) { | |
1736 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); | |
1737 | return EXCP_INTERRUPT; | |
1738 | } | |
1739 | } | |
1740 | /* FIXME: Should trigger a qmp message to let management know | |
1741 | * something went wrong. | |
1742 | */ | |
1743 | return -1; | |
1744 | } | |
1745 | ||
1746 | void kvm_flush_coalesced_mmio_buffer(void) | |
1747 | { | |
1748 | KVMState *s = kvm_state; | |
1749 | ||
1750 | if (s->coalesced_flush_in_progress) { | |
1751 | return; | |
1752 | } | |
1753 | ||
1754 | s->coalesced_flush_in_progress = true; | |
1755 | ||
1756 | if (s->coalesced_mmio_ring) { | |
1757 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
1758 | while (ring->first != ring->last) { | |
1759 | struct kvm_coalesced_mmio *ent; | |
1760 | ||
1761 | ent = &ring->coalesced_mmio[ring->first]; | |
1762 | ||
1763 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
1764 | smp_wmb(); | |
1765 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; | |
1766 | } | |
1767 | } | |
1768 | ||
1769 | s->coalesced_flush_in_progress = false; | |
1770 | } | |
1771 | ||
1772 | static void do_kvm_cpu_synchronize_state(void *arg) | |
1773 | { | |
1774 | CPUState *cpu = arg; | |
1775 | ||
1776 | if (!cpu->kvm_vcpu_dirty) { | |
1777 | kvm_arch_get_registers(cpu); | |
1778 | cpu->kvm_vcpu_dirty = true; | |
1779 | } | |
1780 | } | |
1781 | ||
1782 | void kvm_cpu_synchronize_state(CPUState *cpu) | |
1783 | { | |
1784 | if (!cpu->kvm_vcpu_dirty) { | |
1785 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, cpu); | |
1786 | } | |
1787 | } | |
1788 | ||
1789 | static void do_kvm_cpu_synchronize_post_reset(void *arg) | |
1790 | { | |
1791 | CPUState *cpu = arg; | |
1792 | ||
1793 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); | |
1794 | cpu->kvm_vcpu_dirty = false; | |
1795 | } | |
1796 | ||
1797 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) | |
1798 | { | |
1799 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, cpu); | |
1800 | } | |
1801 | ||
1802 | static void do_kvm_cpu_synchronize_post_init(void *arg) | |
1803 | { | |
1804 | CPUState *cpu = arg; | |
1805 | ||
1806 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); | |
1807 | cpu->kvm_vcpu_dirty = false; | |
1808 | } | |
1809 | ||
1810 | void kvm_cpu_synchronize_post_init(CPUState *cpu) | |
1811 | { | |
1812 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, cpu); | |
1813 | } | |
1814 | ||
1815 | int kvm_cpu_exec(CPUState *cpu) | |
1816 | { | |
1817 | struct kvm_run *run = cpu->kvm_run; | |
1818 | int ret, run_ret; | |
1819 | ||
1820 | DPRINTF("kvm_cpu_exec()\n"); | |
1821 | ||
1822 | if (kvm_arch_process_async_events(cpu)) { | |
1823 | cpu->exit_request = 0; | |
1824 | return EXCP_HLT; | |
1825 | } | |
1826 | ||
1827 | qemu_mutex_unlock_iothread(); | |
1828 | ||
1829 | do { | |
1830 | MemTxAttrs attrs; | |
1831 | ||
1832 | if (cpu->kvm_vcpu_dirty) { | |
1833 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); | |
1834 | cpu->kvm_vcpu_dirty = false; | |
1835 | } | |
1836 | ||
1837 | kvm_arch_pre_run(cpu, run); | |
1838 | if (cpu->exit_request) { | |
1839 | DPRINTF("interrupt exit requested\n"); | |
1840 | /* | |
1841 | * KVM requires us to reenter the kernel after IO exits to complete | |
1842 | * instruction emulation. This self-signal will ensure that we | |
1843 | * leave ASAP again. | |
1844 | */ | |
1845 | qemu_cpu_kick_self(); | |
1846 | } | |
1847 | ||
1848 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); | |
1849 | ||
1850 | attrs = kvm_arch_post_run(cpu, run); | |
1851 | ||
1852 | if (run_ret < 0) { | |
1853 | if (run_ret == -EINTR || run_ret == -EAGAIN) { | |
1854 | DPRINTF("io window exit\n"); | |
1855 | ret = EXCP_INTERRUPT; | |
1856 | break; | |
1857 | } | |
1858 | fprintf(stderr, "error: kvm run failed %s\n", | |
1859 | strerror(-run_ret)); | |
1860 | #ifdef TARGET_PPC | |
1861 | if (run_ret == -EBUSY) { | |
1862 | fprintf(stderr, | |
1863 | "This is probably because your SMT is enabled.\n" | |
1864 | "VCPU can only run on primary threads with all " | |
1865 | "secondary threads offline.\n"); | |
1866 | } | |
1867 | #endif | |
1868 | ret = -1; | |
1869 | break; | |
1870 | } | |
1871 | ||
1872 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); | |
1873 | switch (run->exit_reason) { | |
1874 | case KVM_EXIT_IO: | |
1875 | DPRINTF("handle_io\n"); | |
1876 | /* Called outside BQL */ | |
1877 | kvm_handle_io(run->io.port, attrs, | |
1878 | (uint8_t *)run + run->io.data_offset, | |
1879 | run->io.direction, | |
1880 | run->io.size, | |
1881 | run->io.count); | |
1882 | ret = 0; | |
1883 | break; | |
1884 | case KVM_EXIT_MMIO: | |
1885 | DPRINTF("handle_mmio\n"); | |
1886 | /* Called outside BQL */ | |
1887 | address_space_rw(&address_space_memory, | |
1888 | run->mmio.phys_addr, attrs, | |
1889 | run->mmio.data, | |
1890 | run->mmio.len, | |
1891 | run->mmio.is_write); | |
1892 | ret = 0; | |
1893 | break; | |
1894 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
1895 | DPRINTF("irq_window_open\n"); | |
1896 | ret = EXCP_INTERRUPT; | |
1897 | break; | |
1898 | case KVM_EXIT_SHUTDOWN: | |
1899 | DPRINTF("shutdown\n"); | |
1900 | qemu_system_reset_request(); | |
1901 | ret = EXCP_INTERRUPT; | |
1902 | break; | |
1903 | case KVM_EXIT_UNKNOWN: | |
1904 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", | |
1905 | (uint64_t)run->hw.hardware_exit_reason); | |
1906 | ret = -1; | |
1907 | break; | |
1908 | case KVM_EXIT_INTERNAL_ERROR: | |
1909 | ret = kvm_handle_internal_error(cpu, run); | |
1910 | break; | |
1911 | case KVM_EXIT_SYSTEM_EVENT: | |
1912 | switch (run->system_event.type) { | |
1913 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
1914 | qemu_system_shutdown_request(); | |
1915 | ret = EXCP_INTERRUPT; | |
1916 | break; | |
1917 | case KVM_SYSTEM_EVENT_RESET: | |
1918 | qemu_system_reset_request(); | |
1919 | ret = EXCP_INTERRUPT; | |
1920 | break; | |
1921 | case KVM_SYSTEM_EVENT_CRASH: | |
1922 | qemu_mutex_lock_iothread(); | |
1923 | qemu_system_guest_panicked(); | |
1924 | qemu_mutex_unlock_iothread(); | |
1925 | ret = 0; | |
1926 | break; | |
1927 | default: | |
1928 | DPRINTF("kvm_arch_handle_exit\n"); | |
1929 | ret = kvm_arch_handle_exit(cpu, run); | |
1930 | break; | |
1931 | } | |
1932 | break; | |
1933 | default: | |
1934 | DPRINTF("kvm_arch_handle_exit\n"); | |
1935 | ret = kvm_arch_handle_exit(cpu, run); | |
1936 | break; | |
1937 | } | |
1938 | } while (ret == 0); | |
1939 | ||
1940 | qemu_mutex_lock_iothread(); | |
1941 | ||
1942 | if (ret < 0) { | |
1943 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); | |
1944 | vm_stop(RUN_STATE_INTERNAL_ERROR); | |
1945 | } | |
1946 | ||
1947 | cpu->exit_request = 0; | |
1948 | return ret; | |
1949 | } | |
1950 | ||
1951 | int kvm_ioctl(KVMState *s, int type, ...) | |
1952 | { | |
1953 | int ret; | |
1954 | void *arg; | |
1955 | va_list ap; | |
1956 | ||
1957 | va_start(ap, type); | |
1958 | arg = va_arg(ap, void *); | |
1959 | va_end(ap); | |
1960 | ||
1961 | trace_kvm_ioctl(type, arg); | |
1962 | ret = ioctl(s->fd, type, arg); | |
1963 | if (ret == -1) { | |
1964 | ret = -errno; | |
1965 | } | |
1966 | return ret; | |
1967 | } | |
1968 | ||
1969 | int kvm_vm_ioctl(KVMState *s, int type, ...) | |
1970 | { | |
1971 | int ret; | |
1972 | void *arg; | |
1973 | va_list ap; | |
1974 | ||
1975 | va_start(ap, type); | |
1976 | arg = va_arg(ap, void *); | |
1977 | va_end(ap); | |
1978 | ||
1979 | trace_kvm_vm_ioctl(type, arg); | |
1980 | ret = ioctl(s->vmfd, type, arg); | |
1981 | if (ret == -1) { | |
1982 | ret = -errno; | |
1983 | } | |
1984 | return ret; | |
1985 | } | |
1986 | ||
1987 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) | |
1988 | { | |
1989 | int ret; | |
1990 | void *arg; | |
1991 | va_list ap; | |
1992 | ||
1993 | va_start(ap, type); | |
1994 | arg = va_arg(ap, void *); | |
1995 | va_end(ap); | |
1996 | ||
1997 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); | |
1998 | ret = ioctl(cpu->kvm_fd, type, arg); | |
1999 | if (ret == -1) { | |
2000 | ret = -errno; | |
2001 | } | |
2002 | return ret; | |
2003 | } | |
2004 | ||
2005 | int kvm_device_ioctl(int fd, int type, ...) | |
2006 | { | |
2007 | int ret; | |
2008 | void *arg; | |
2009 | va_list ap; | |
2010 | ||
2011 | va_start(ap, type); | |
2012 | arg = va_arg(ap, void *); | |
2013 | va_end(ap); | |
2014 | ||
2015 | trace_kvm_device_ioctl(fd, type, arg); | |
2016 | ret = ioctl(fd, type, arg); | |
2017 | if (ret == -1) { | |
2018 | ret = -errno; | |
2019 | } | |
2020 | return ret; | |
2021 | } | |
2022 | ||
2023 | int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) | |
2024 | { | |
2025 | int ret; | |
2026 | struct kvm_device_attr attribute = { | |
2027 | .group = group, | |
2028 | .attr = attr, | |
2029 | }; | |
2030 | ||
2031 | if (!kvm_vm_attributes_allowed) { | |
2032 | return 0; | |
2033 | } | |
2034 | ||
2035 | ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); | |
2036 | /* kvm returns 0 on success for HAS_DEVICE_ATTR */ | |
2037 | return ret ? 0 : 1; | |
2038 | } | |
2039 | ||
2040 | int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) | |
2041 | { | |
2042 | struct kvm_device_attr attribute = { | |
2043 | .group = group, | |
2044 | .attr = attr, | |
2045 | .flags = 0, | |
2046 | }; | |
2047 | ||
2048 | return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; | |
2049 | } | |
2050 | ||
2051 | void kvm_device_access(int fd, int group, uint64_t attr, | |
2052 | void *val, bool write) | |
2053 | { | |
2054 | struct kvm_device_attr kvmattr; | |
2055 | int err; | |
2056 | ||
2057 | kvmattr.flags = 0; | |
2058 | kvmattr.group = group; | |
2059 | kvmattr.attr = attr; | |
2060 | kvmattr.addr = (uintptr_t)val; | |
2061 | ||
2062 | err = kvm_device_ioctl(fd, | |
2063 | write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, | |
2064 | &kvmattr); | |
2065 | if (err < 0) { | |
2066 | error_report("KVM_%s_DEVICE_ATTR failed: %s", | |
2067 | write ? "SET" : "GET", strerror(-err)); | |
2068 | error_printf("Group %d attr 0x%016" PRIx64, group, attr); | |
2069 | abort(); | |
2070 | } | |
2071 | } | |
2072 | ||
2073 | int kvm_has_sync_mmu(void) | |
2074 | { | |
2075 | return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); | |
2076 | } | |
2077 | ||
2078 | int kvm_has_vcpu_events(void) | |
2079 | { | |
2080 | return kvm_state->vcpu_events; | |
2081 | } | |
2082 | ||
2083 | int kvm_has_robust_singlestep(void) | |
2084 | { | |
2085 | return kvm_state->robust_singlestep; | |
2086 | } | |
2087 | ||
2088 | int kvm_has_debugregs(void) | |
2089 | { | |
2090 | return kvm_state->debugregs; | |
2091 | } | |
2092 | ||
2093 | int kvm_has_many_ioeventfds(void) | |
2094 | { | |
2095 | if (!kvm_enabled()) { | |
2096 | return 0; | |
2097 | } | |
2098 | return kvm_state->many_ioeventfds; | |
2099 | } | |
2100 | ||
2101 | int kvm_has_gsi_routing(void) | |
2102 | { | |
2103 | #ifdef KVM_CAP_IRQ_ROUTING | |
2104 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); | |
2105 | #else | |
2106 | return false; | |
2107 | #endif | |
2108 | } | |
2109 | ||
2110 | int kvm_has_intx_set_mask(void) | |
2111 | { | |
2112 | return kvm_state->intx_set_mask; | |
2113 | } | |
2114 | ||
2115 | void kvm_setup_guest_memory(void *start, size_t size) | |
2116 | { | |
2117 | if (!kvm_has_sync_mmu()) { | |
2118 | int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK); | |
2119 | ||
2120 | if (ret) { | |
2121 | perror("qemu_madvise"); | |
2122 | fprintf(stderr, | |
2123 | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n"); | |
2124 | exit(1); | |
2125 | } | |
2126 | } | |
2127 | } | |
2128 | ||
2129 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
2130 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, | |
2131 | target_ulong pc) | |
2132 | { | |
2133 | struct kvm_sw_breakpoint *bp; | |
2134 | ||
2135 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { | |
2136 | if (bp->pc == pc) { | |
2137 | return bp; | |
2138 | } | |
2139 | } | |
2140 | return NULL; | |
2141 | } | |
2142 | ||
2143 | int kvm_sw_breakpoints_active(CPUState *cpu) | |
2144 | { | |
2145 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); | |
2146 | } | |
2147 | ||
2148 | struct kvm_set_guest_debug_data { | |
2149 | struct kvm_guest_debug dbg; | |
2150 | CPUState *cpu; | |
2151 | int err; | |
2152 | }; | |
2153 | ||
2154 | static void kvm_invoke_set_guest_debug(void *data) | |
2155 | { | |
2156 | struct kvm_set_guest_debug_data *dbg_data = data; | |
2157 | ||
2158 | dbg_data->err = kvm_vcpu_ioctl(dbg_data->cpu, KVM_SET_GUEST_DEBUG, | |
2159 | &dbg_data->dbg); | |
2160 | } | |
2161 | ||
2162 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) | |
2163 | { | |
2164 | struct kvm_set_guest_debug_data data; | |
2165 | ||
2166 | data.dbg.control = reinject_trap; | |
2167 | ||
2168 | if (cpu->singlestep_enabled) { | |
2169 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; | |
2170 | } | |
2171 | kvm_arch_update_guest_debug(cpu, &data.dbg); | |
2172 | data.cpu = cpu; | |
2173 | ||
2174 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, &data); | |
2175 | return data.err; | |
2176 | } | |
2177 | ||
2178 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, | |
2179 | target_ulong len, int type) | |
2180 | { | |
2181 | struct kvm_sw_breakpoint *bp; | |
2182 | int err; | |
2183 | ||
2184 | if (type == GDB_BREAKPOINT_SW) { | |
2185 | bp = kvm_find_sw_breakpoint(cpu, addr); | |
2186 | if (bp) { | |
2187 | bp->use_count++; | |
2188 | return 0; | |
2189 | } | |
2190 | ||
2191 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); | |
2192 | bp->pc = addr; | |
2193 | bp->use_count = 1; | |
2194 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); | |
2195 | if (err) { | |
2196 | g_free(bp); | |
2197 | return err; | |
2198 | } | |
2199 | ||
2200 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); | |
2201 | } else { | |
2202 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
2203 | if (err) { | |
2204 | return err; | |
2205 | } | |
2206 | } | |
2207 | ||
2208 | CPU_FOREACH(cpu) { | |
2209 | err = kvm_update_guest_debug(cpu, 0); | |
2210 | if (err) { | |
2211 | return err; | |
2212 | } | |
2213 | } | |
2214 | return 0; | |
2215 | } | |
2216 | ||
2217 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, | |
2218 | target_ulong len, int type) | |
2219 | { | |
2220 | struct kvm_sw_breakpoint *bp; | |
2221 | int err; | |
2222 | ||
2223 | if (type == GDB_BREAKPOINT_SW) { | |
2224 | bp = kvm_find_sw_breakpoint(cpu, addr); | |
2225 | if (!bp) { | |
2226 | return -ENOENT; | |
2227 | } | |
2228 | ||
2229 | if (bp->use_count > 1) { | |
2230 | bp->use_count--; | |
2231 | return 0; | |
2232 | } | |
2233 | ||
2234 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); | |
2235 | if (err) { | |
2236 | return err; | |
2237 | } | |
2238 | ||
2239 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); | |
2240 | g_free(bp); | |
2241 | } else { | |
2242 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
2243 | if (err) { | |
2244 | return err; | |
2245 | } | |
2246 | } | |
2247 | ||
2248 | CPU_FOREACH(cpu) { | |
2249 | err = kvm_update_guest_debug(cpu, 0); | |
2250 | if (err) { | |
2251 | return err; | |
2252 | } | |
2253 | } | |
2254 | return 0; | |
2255 | } | |
2256 | ||
2257 | void kvm_remove_all_breakpoints(CPUState *cpu) | |
2258 | { | |
2259 | struct kvm_sw_breakpoint *bp, *next; | |
2260 | KVMState *s = cpu->kvm_state; | |
2261 | CPUState *tmpcpu; | |
2262 | ||
2263 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { | |
2264 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { | |
2265 | /* Try harder to find a CPU that currently sees the breakpoint. */ | |
2266 | CPU_FOREACH(tmpcpu) { | |
2267 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
2268 | break; | |
2269 | } | |
2270 | } | |
2271 | } | |
2272 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); | |
2273 | g_free(bp); | |
2274 | } | |
2275 | kvm_arch_remove_all_hw_breakpoints(); | |
2276 | ||
2277 | CPU_FOREACH(cpu) { | |
2278 | kvm_update_guest_debug(cpu, 0); | |
2279 | } | |
2280 | } | |
2281 | ||
2282 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2283 | ||
2284 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) | |
2285 | { | |
2286 | return -EINVAL; | |
2287 | } | |
2288 | ||
2289 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, | |
2290 | target_ulong len, int type) | |
2291 | { | |
2292 | return -EINVAL; | |
2293 | } | |
2294 | ||
2295 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, | |
2296 | target_ulong len, int type) | |
2297 | { | |
2298 | return -EINVAL; | |
2299 | } | |
2300 | ||
2301 | void kvm_remove_all_breakpoints(CPUState *cpu) | |
2302 | { | |
2303 | } | |
2304 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2305 | ||
2306 | int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) | |
2307 | { | |
2308 | KVMState *s = kvm_state; | |
2309 | struct kvm_signal_mask *sigmask; | |
2310 | int r; | |
2311 | ||
2312 | if (!sigset) { | |
2313 | return kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, NULL); | |
2314 | } | |
2315 | ||
2316 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); | |
2317 | ||
2318 | sigmask->len = s->sigmask_len; | |
2319 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); | |
2320 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); | |
2321 | g_free(sigmask); | |
2322 | ||
2323 | return r; | |
2324 | } | |
2325 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) | |
2326 | { | |
2327 | return kvm_arch_on_sigbus_vcpu(cpu, code, addr); | |
2328 | } | |
2329 | ||
2330 | int kvm_on_sigbus(int code, void *addr) | |
2331 | { | |
2332 | return kvm_arch_on_sigbus(code, addr); | |
2333 | } | |
2334 | ||
2335 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
2336 | { | |
2337 | int ret; | |
2338 | struct kvm_create_device create_dev; | |
2339 | ||
2340 | create_dev.type = type; | |
2341 | create_dev.fd = -1; | |
2342 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
2343 | ||
2344 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
2345 | return -ENOTSUP; | |
2346 | } | |
2347 | ||
2348 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
2349 | if (ret) { | |
2350 | return ret; | |
2351 | } | |
2352 | ||
2353 | return test ? 0 : create_dev.fd; | |
2354 | } | |
2355 | ||
2356 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) | |
2357 | { | |
2358 | struct kvm_one_reg reg; | |
2359 | int r; | |
2360 | ||
2361 | reg.id = id; | |
2362 | reg.addr = (uintptr_t) source; | |
2363 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
2364 | if (r) { | |
2365 | trace_kvm_failed_reg_set(id, strerror(r)); | |
2366 | } | |
2367 | return r; | |
2368 | } | |
2369 | ||
2370 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
2371 | { | |
2372 | struct kvm_one_reg reg; | |
2373 | int r; | |
2374 | ||
2375 | reg.id = id; | |
2376 | reg.addr = (uintptr_t) target; | |
2377 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
2378 | if (r) { | |
2379 | trace_kvm_failed_reg_get(id, strerror(r)); | |
2380 | } | |
2381 | return r; | |
2382 | } | |
2383 | ||
2384 | static void kvm_accel_class_init(ObjectClass *oc, void *data) | |
2385 | { | |
2386 | AccelClass *ac = ACCEL_CLASS(oc); | |
2387 | ac->name = "KVM"; | |
2388 | ac->init_machine = kvm_init; | |
2389 | ac->allowed = &kvm_allowed; | |
2390 | } | |
2391 | ||
2392 | static const TypeInfo kvm_accel_type = { | |
2393 | .name = TYPE_KVM_ACCEL, | |
2394 | .parent = TYPE_ACCEL, | |
2395 | .class_init = kvm_accel_class_init, | |
2396 | .instance_size = sizeof(KVMState), | |
2397 | }; | |
2398 | ||
2399 | static void kvm_type_init(void) | |
2400 | { | |
2401 | type_register_static(&kvm_accel_type); | |
2402 | } | |
2403 | ||
2404 | type_init(kvm_type_init); |