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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 "qemu/osdep.h" | |
17 | #include <sys/ioctl.h> | |
18 | ||
19 | #include <linux/kvm.h> | |
20 | ||
21 | #include "qemu-common.h" | |
22 | #include "qemu/atomic.h" | |
23 | #include "qemu/option.h" | |
24 | #include "qemu/config-file.h" | |
25 | #include "qemu/error-report.h" | |
26 | #include "hw/hw.h" | |
27 | #include "hw/pci/msi.h" | |
28 | #include "hw/pci/msix.h" | |
29 | #include "hw/s390x/adapter.h" | |
30 | #include "exec/gdbstub.h" | |
31 | #include "sysemu/kvm_int.h" | |
32 | #include "qemu/bswap.h" | |
33 | #include "exec/memory.h" | |
34 | #include "exec/ram_addr.h" | |
35 | #include "exec/address-spaces.h" | |
36 | #include "qemu/event_notifier.h" | |
37 | #include "trace.h" | |
38 | #include "hw/irq.h" | |
39 | ||
40 | #include "hw/boards.h" | |
41 | ||
42 | /* This check must be after config-host.h is included */ | |
43 | #ifdef CONFIG_EVENTFD | |
44 | #include <sys/eventfd.h> | |
45 | #endif | |
46 | ||
47 | /* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We | |
48 | * need to use the real host PAGE_SIZE, as that's what KVM will use. | |
49 | */ | |
50 | #define PAGE_SIZE getpagesize() | |
51 | ||
52 | //#define DEBUG_KVM | |
53 | ||
54 | #ifdef DEBUG_KVM | |
55 | #define DPRINTF(fmt, ...) \ | |
56 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
57 | #else | |
58 | #define DPRINTF(fmt, ...) \ | |
59 | do { } while (0) | |
60 | #endif | |
61 | ||
62 | #define KVM_MSI_HASHTAB_SIZE 256 | |
63 | ||
64 | struct KVMParkedVcpu { | |
65 | unsigned long vcpu_id; | |
66 | int kvm_fd; | |
67 | QLIST_ENTRY(KVMParkedVcpu) node; | |
68 | }; | |
69 | ||
70 | struct KVMState | |
71 | { | |
72 | AccelState parent_obj; | |
73 | ||
74 | int nr_slots; | |
75 | int fd; | |
76 | int vmfd; | |
77 | int coalesced_mmio; | |
78 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; | |
79 | bool coalesced_flush_in_progress; | |
80 | int broken_set_mem_region; | |
81 | int vcpu_events; | |
82 | int robust_singlestep; | |
83 | int debugregs; | |
84 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
85 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; | |
86 | #endif | |
87 | int many_ioeventfds; | |
88 | int intx_set_mask; | |
89 | /* The man page (and posix) say ioctl numbers are signed int, but | |
90 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
91 | * unsigned, and treating them as signed here can break things */ | |
92 | unsigned irq_set_ioctl; | |
93 | unsigned int sigmask_len; | |
94 | GHashTable *gsimap; | |
95 | #ifdef KVM_CAP_IRQ_ROUTING | |
96 | struct kvm_irq_routing *irq_routes; | |
97 | int nr_allocated_irq_routes; | |
98 | unsigned long *used_gsi_bitmap; | |
99 | unsigned int gsi_count; | |
100 | QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; | |
101 | #endif | |
102 | KVMMemoryListener memory_listener; | |
103 | QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus; | |
104 | }; | |
105 | ||
106 | KVMState *kvm_state; | |
107 | bool kvm_kernel_irqchip; | |
108 | bool kvm_split_irqchip; | |
109 | bool kvm_async_interrupts_allowed; | |
110 | bool kvm_halt_in_kernel_allowed; | |
111 | bool kvm_eventfds_allowed; | |
112 | bool kvm_irqfds_allowed; | |
113 | bool kvm_resamplefds_allowed; | |
114 | bool kvm_msi_via_irqfd_allowed; | |
115 | bool kvm_gsi_routing_allowed; | |
116 | bool kvm_gsi_direct_mapping; | |
117 | bool kvm_allowed; | |
118 | bool kvm_readonly_mem_allowed; | |
119 | bool kvm_vm_attributes_allowed; | |
120 | bool kvm_direct_msi_allowed; | |
121 | bool kvm_ioeventfd_any_length_allowed; | |
122 | ||
123 | static const KVMCapabilityInfo kvm_required_capabilites[] = { | |
124 | KVM_CAP_INFO(USER_MEMORY), | |
125 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
126 | KVM_CAP_LAST_INFO | |
127 | }; | |
128 | ||
129 | int kvm_get_max_memslots(void) | |
130 | { | |
131 | KVMState *s = KVM_STATE(current_machine->accelerator); | |
132 | ||
133 | return s->nr_slots; | |
134 | } | |
135 | ||
136 | static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml) | |
137 | { | |
138 | KVMState *s = kvm_state; | |
139 | int i; | |
140 | ||
141 | for (i = 0; i < s->nr_slots; i++) { | |
142 | if (kml->slots[i].memory_size == 0) { | |
143 | return &kml->slots[i]; | |
144 | } | |
145 | } | |
146 | ||
147 | return NULL; | |
148 | } | |
149 | ||
150 | bool kvm_has_free_slot(MachineState *ms) | |
151 | { | |
152 | KVMState *s = KVM_STATE(ms->accelerator); | |
153 | ||
154 | return kvm_get_free_slot(&s->memory_listener); | |
155 | } | |
156 | ||
157 | static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml) | |
158 | { | |
159 | KVMSlot *slot = kvm_get_free_slot(kml); | |
160 | ||
161 | if (slot) { | |
162 | return slot; | |
163 | } | |
164 | ||
165 | fprintf(stderr, "%s: no free slot available\n", __func__); | |
166 | abort(); | |
167 | } | |
168 | ||
169 | static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml, | |
170 | hwaddr start_addr, | |
171 | hwaddr end_addr) | |
172 | { | |
173 | KVMState *s = kvm_state; | |
174 | int i; | |
175 | ||
176 | for (i = 0; i < s->nr_slots; i++) { | |
177 | KVMSlot *mem = &kml->slots[i]; | |
178 | ||
179 | if (start_addr == mem->start_addr && | |
180 | end_addr == mem->start_addr + mem->memory_size) { | |
181 | return mem; | |
182 | } | |
183 | } | |
184 | ||
185 | return NULL; | |
186 | } | |
187 | ||
188 | /* | |
189 | * Find overlapping slot with lowest start address | |
190 | */ | |
191 | static KVMSlot *kvm_lookup_overlapping_slot(KVMMemoryListener *kml, | |
192 | hwaddr start_addr, | |
193 | hwaddr end_addr) | |
194 | { | |
195 | KVMState *s = kvm_state; | |
196 | KVMSlot *found = NULL; | |
197 | int i; | |
198 | ||
199 | for (i = 0; i < s->nr_slots; i++) { | |
200 | KVMSlot *mem = &kml->slots[i]; | |
201 | ||
202 | if (mem->memory_size == 0 || | |
203 | (found && found->start_addr < mem->start_addr)) { | |
204 | continue; | |
205 | } | |
206 | ||
207 | if (end_addr > mem->start_addr && | |
208 | start_addr < mem->start_addr + mem->memory_size) { | |
209 | found = mem; | |
210 | } | |
211 | } | |
212 | ||
213 | return found; | |
214 | } | |
215 | ||
216 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, | |
217 | hwaddr *phys_addr) | |
218 | { | |
219 | KVMMemoryListener *kml = &s->memory_listener; | |
220 | int i; | |
221 | ||
222 | for (i = 0; i < s->nr_slots; i++) { | |
223 | KVMSlot *mem = &kml->slots[i]; | |
224 | ||
225 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { | |
226 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
227 | return 1; | |
228 | } | |
229 | } | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot) | |
235 | { | |
236 | KVMState *s = kvm_state; | |
237 | struct kvm_userspace_memory_region mem; | |
238 | ||
239 | mem.slot = slot->slot | (kml->as_id << 16); | |
240 | mem.guest_phys_addr = slot->start_addr; | |
241 | mem.userspace_addr = (unsigned long)slot->ram; | |
242 | mem.flags = slot->flags; | |
243 | ||
244 | if (slot->memory_size && mem.flags & KVM_MEM_READONLY) { | |
245 | /* Set the slot size to 0 before setting the slot to the desired | |
246 | * value. This is needed based on KVM commit 75d61fbc. */ | |
247 | mem.memory_size = 0; | |
248 | kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
249 | } | |
250 | mem.memory_size = slot->memory_size; | |
251 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
252 | } | |
253 | ||
254 | int kvm_destroy_vcpu(CPUState *cpu) | |
255 | { | |
256 | KVMState *s = kvm_state; | |
257 | long mmap_size; | |
258 | struct KVMParkedVcpu *vcpu = NULL; | |
259 | int ret = 0; | |
260 | ||
261 | DPRINTF("kvm_destroy_vcpu\n"); | |
262 | ||
263 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
264 | if (mmap_size < 0) { | |
265 | ret = mmap_size; | |
266 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
267 | goto err; | |
268 | } | |
269 | ||
270 | ret = munmap(cpu->kvm_run, mmap_size); | |
271 | if (ret < 0) { | |
272 | goto err; | |
273 | } | |
274 | ||
275 | vcpu = g_malloc0(sizeof(*vcpu)); | |
276 | vcpu->vcpu_id = kvm_arch_vcpu_id(cpu); | |
277 | vcpu->kvm_fd = cpu->kvm_fd; | |
278 | QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node); | |
279 | err: | |
280 | return ret; | |
281 | } | |
282 | ||
283 | static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id) | |
284 | { | |
285 | struct KVMParkedVcpu *cpu; | |
286 | ||
287 | QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) { | |
288 | if (cpu->vcpu_id == vcpu_id) { | |
289 | int kvm_fd; | |
290 | ||
291 | QLIST_REMOVE(cpu, node); | |
292 | kvm_fd = cpu->kvm_fd; | |
293 | g_free(cpu); | |
294 | return kvm_fd; | |
295 | } | |
296 | } | |
297 | ||
298 | return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id); | |
299 | } | |
300 | ||
301 | int kvm_init_vcpu(CPUState *cpu) | |
302 | { | |
303 | KVMState *s = kvm_state; | |
304 | long mmap_size; | |
305 | int ret; | |
306 | ||
307 | DPRINTF("kvm_init_vcpu\n"); | |
308 | ||
309 | ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu)); | |
310 | if (ret < 0) { | |
311 | DPRINTF("kvm_create_vcpu failed\n"); | |
312 | goto err; | |
313 | } | |
314 | ||
315 | cpu->kvm_fd = ret; | |
316 | cpu->kvm_state = s; | |
317 | cpu->kvm_vcpu_dirty = true; | |
318 | ||
319 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
320 | if (mmap_size < 0) { | |
321 | ret = mmap_size; | |
322 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
323 | goto err; | |
324 | } | |
325 | ||
326 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
327 | cpu->kvm_fd, 0); | |
328 | if (cpu->kvm_run == MAP_FAILED) { | |
329 | ret = -errno; | |
330 | DPRINTF("mmap'ing vcpu state failed\n"); | |
331 | goto err; | |
332 | } | |
333 | ||
334 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { | |
335 | s->coalesced_mmio_ring = | |
336 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; | |
337 | } | |
338 | ||
339 | ret = kvm_arch_init_vcpu(cpu); | |
340 | err: | |
341 | return ret; | |
342 | } | |
343 | ||
344 | /* | |
345 | * dirty pages logging control | |
346 | */ | |
347 | ||
348 | static int kvm_mem_flags(MemoryRegion *mr) | |
349 | { | |
350 | bool readonly = mr->readonly || memory_region_is_romd(mr); | |
351 | int flags = 0; | |
352 | ||
353 | if (memory_region_get_dirty_log_mask(mr) != 0) { | |
354 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
355 | } | |
356 | if (readonly && kvm_readonly_mem_allowed) { | |
357 | flags |= KVM_MEM_READONLY; | |
358 | } | |
359 | return flags; | |
360 | } | |
361 | ||
362 | static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, | |
363 | MemoryRegion *mr) | |
364 | { | |
365 | int old_flags; | |
366 | ||
367 | old_flags = mem->flags; | |
368 | mem->flags = kvm_mem_flags(mr); | |
369 | ||
370 | /* If nothing changed effectively, no need to issue ioctl */ | |
371 | if (mem->flags == old_flags) { | |
372 | return 0; | |
373 | } | |
374 | ||
375 | return kvm_set_user_memory_region(kml, mem); | |
376 | } | |
377 | ||
378 | static int kvm_section_update_flags(KVMMemoryListener *kml, | |
379 | MemoryRegionSection *section) | |
380 | { | |
381 | hwaddr phys_addr = section->offset_within_address_space; | |
382 | ram_addr_t size = int128_get64(section->size); | |
383 | KVMSlot *mem = kvm_lookup_matching_slot(kml, phys_addr, phys_addr + size); | |
384 | ||
385 | if (mem == NULL) { | |
386 | return 0; | |
387 | } else { | |
388 | return kvm_slot_update_flags(kml, mem, section->mr); | |
389 | } | |
390 | } | |
391 | ||
392 | static void kvm_log_start(MemoryListener *listener, | |
393 | MemoryRegionSection *section, | |
394 | int old, int new) | |
395 | { | |
396 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
397 | int r; | |
398 | ||
399 | if (old != 0) { | |
400 | return; | |
401 | } | |
402 | ||
403 | r = kvm_section_update_flags(kml, section); | |
404 | if (r < 0) { | |
405 | abort(); | |
406 | } | |
407 | } | |
408 | ||
409 | static void kvm_log_stop(MemoryListener *listener, | |
410 | MemoryRegionSection *section, | |
411 | int old, int new) | |
412 | { | |
413 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
414 | int r; | |
415 | ||
416 | if (new != 0) { | |
417 | return; | |
418 | } | |
419 | ||
420 | r = kvm_section_update_flags(kml, section); | |
421 | if (r < 0) { | |
422 | abort(); | |
423 | } | |
424 | } | |
425 | ||
426 | /* get kvm's dirty pages bitmap and update qemu's */ | |
427 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, | |
428 | unsigned long *bitmap) | |
429 | { | |
430 | ram_addr_t start = section->offset_within_region + | |
431 | memory_region_get_ram_addr(section->mr); | |
432 | ram_addr_t pages = int128_get64(section->size) / getpagesize(); | |
433 | ||
434 | cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); | |
435 | return 0; | |
436 | } | |
437 | ||
438 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) | |
439 | ||
440 | /** | |
441 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
442 | * This function updates qemu's dirty bitmap using | |
443 | * memory_region_set_dirty(). This means all bits are set | |
444 | * to dirty. | |
445 | * | |
446 | * @start_add: start of logged region. | |
447 | * @end_addr: end of logged region. | |
448 | */ | |
449 | static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, | |
450 | MemoryRegionSection *section) | |
451 | { | |
452 | KVMState *s = kvm_state; | |
453 | unsigned long size, allocated_size = 0; | |
454 | struct kvm_dirty_log d = {}; | |
455 | KVMSlot *mem; | |
456 | int ret = 0; | |
457 | hwaddr start_addr = section->offset_within_address_space; | |
458 | hwaddr end_addr = start_addr + int128_get64(section->size); | |
459 | ||
460 | d.dirty_bitmap = NULL; | |
461 | while (start_addr < end_addr) { | |
462 | mem = kvm_lookup_overlapping_slot(kml, start_addr, end_addr); | |
463 | if (mem == NULL) { | |
464 | break; | |
465 | } | |
466 | ||
467 | /* XXX bad kernel interface alert | |
468 | * For dirty bitmap, kernel allocates array of size aligned to | |
469 | * bits-per-long. But for case when the kernel is 64bits and | |
470 | * the userspace is 32bits, userspace can't align to the same | |
471 | * bits-per-long, since sizeof(long) is different between kernel | |
472 | * and user space. This way, userspace will provide buffer which | |
473 | * may be 4 bytes less than the kernel will use, resulting in | |
474 | * userspace memory corruption (which is not detectable by valgrind | |
475 | * too, in most cases). | |
476 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
477 | * a hope that sizeof(long) won't become >8 any time soon. | |
478 | */ | |
479 | size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
480 | /*HOST_LONG_BITS*/ 64) / 8; | |
481 | if (!d.dirty_bitmap) { | |
482 | d.dirty_bitmap = g_malloc(size); | |
483 | } else if (size > allocated_size) { | |
484 | d.dirty_bitmap = g_realloc(d.dirty_bitmap, size); | |
485 | } | |
486 | allocated_size = size; | |
487 | memset(d.dirty_bitmap, 0, allocated_size); | |
488 | ||
489 | d.slot = mem->slot | (kml->as_id << 16); | |
490 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { | |
491 | DPRINTF("ioctl failed %d\n", errno); | |
492 | ret = -1; | |
493 | break; | |
494 | } | |
495 | ||
496 | kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); | |
497 | start_addr = mem->start_addr + mem->memory_size; | |
498 | } | |
499 | g_free(d.dirty_bitmap); | |
500 | ||
501 | return ret; | |
502 | } | |
503 | ||
504 | static void kvm_coalesce_mmio_region(MemoryListener *listener, | |
505 | MemoryRegionSection *secion, | |
506 | hwaddr start, hwaddr size) | |
507 | { | |
508 | KVMState *s = kvm_state; | |
509 | ||
510 | if (s->coalesced_mmio) { | |
511 | struct kvm_coalesced_mmio_zone zone; | |
512 | ||
513 | zone.addr = start; | |
514 | zone.size = size; | |
515 | zone.pad = 0; | |
516 | ||
517 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
518 | } | |
519 | } | |
520 | ||
521 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, | |
522 | MemoryRegionSection *secion, | |
523 | hwaddr start, hwaddr size) | |
524 | { | |
525 | KVMState *s = kvm_state; | |
526 | ||
527 | if (s->coalesced_mmio) { | |
528 | struct kvm_coalesced_mmio_zone zone; | |
529 | ||
530 | zone.addr = start; | |
531 | zone.size = size; | |
532 | zone.pad = 0; | |
533 | ||
534 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
535 | } | |
536 | } | |
537 | ||
538 | int kvm_check_extension(KVMState *s, unsigned int extension) | |
539 | { | |
540 | int ret; | |
541 | ||
542 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
543 | if (ret < 0) { | |
544 | ret = 0; | |
545 | } | |
546 | ||
547 | return ret; | |
548 | } | |
549 | ||
550 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) | |
551 | { | |
552 | int ret; | |
553 | ||
554 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
555 | if (ret < 0) { | |
556 | /* VM wide version not implemented, use global one instead */ | |
557 | ret = kvm_check_extension(s, extension); | |
558 | } | |
559 | ||
560 | return ret; | |
561 | } | |
562 | ||
563 | static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) | |
564 | { | |
565 | #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) | |
566 | /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN | |
567 | * endianness, but the memory core hands them in target endianness. | |
568 | * For example, PPC is always treated as big-endian even if running | |
569 | * on KVM and on PPC64LE. Correct here. | |
570 | */ | |
571 | switch (size) { | |
572 | case 2: | |
573 | val = bswap16(val); | |
574 | break; | |
575 | case 4: | |
576 | val = bswap32(val); | |
577 | break; | |
578 | } | |
579 | #endif | |
580 | return val; | |
581 | } | |
582 | ||
583 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, | |
584 | bool assign, uint32_t size, bool datamatch) | |
585 | { | |
586 | int ret; | |
587 | struct kvm_ioeventfd iofd = { | |
588 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
589 | .addr = addr, | |
590 | .len = size, | |
591 | .flags = 0, | |
592 | .fd = fd, | |
593 | }; | |
594 | ||
595 | if (!kvm_enabled()) { | |
596 | return -ENOSYS; | |
597 | } | |
598 | ||
599 | if (datamatch) { | |
600 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
601 | } | |
602 | if (!assign) { | |
603 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
604 | } | |
605 | ||
606 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
607 | ||
608 | if (ret < 0) { | |
609 | return -errno; | |
610 | } | |
611 | ||
612 | return 0; | |
613 | } | |
614 | ||
615 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, | |
616 | bool assign, uint32_t size, bool datamatch) | |
617 | { | |
618 | struct kvm_ioeventfd kick = { | |
619 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
620 | .addr = addr, | |
621 | .flags = KVM_IOEVENTFD_FLAG_PIO, | |
622 | .len = size, | |
623 | .fd = fd, | |
624 | }; | |
625 | int r; | |
626 | if (!kvm_enabled()) { | |
627 | return -ENOSYS; | |
628 | } | |
629 | if (datamatch) { | |
630 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
631 | } | |
632 | if (!assign) { | |
633 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
634 | } | |
635 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
636 | if (r < 0) { | |
637 | return r; | |
638 | } | |
639 | return 0; | |
640 | } | |
641 | ||
642 | ||
643 | static int kvm_check_many_ioeventfds(void) | |
644 | { | |
645 | /* Userspace can use ioeventfd for io notification. This requires a host | |
646 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
647 | * support SIGIO it cannot interrupt the vcpu. | |
648 | * | |
649 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
650 | * can avoid creating too many ioeventfds. | |
651 | */ | |
652 | #if defined(CONFIG_EVENTFD) | |
653 | int ioeventfds[7]; | |
654 | int i, ret = 0; | |
655 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
656 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
657 | if (ioeventfds[i] < 0) { | |
658 | break; | |
659 | } | |
660 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); | |
661 | if (ret < 0) { | |
662 | close(ioeventfds[i]); | |
663 | break; | |
664 | } | |
665 | } | |
666 | ||
667 | /* Decide whether many devices are supported or not */ | |
668 | ret = i == ARRAY_SIZE(ioeventfds); | |
669 | ||
670 | while (i-- > 0) { | |
671 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); | |
672 | close(ioeventfds[i]); | |
673 | } | |
674 | return ret; | |
675 | #else | |
676 | return 0; | |
677 | #endif | |
678 | } | |
679 | ||
680 | static const KVMCapabilityInfo * | |
681 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
682 | { | |
683 | while (list->name) { | |
684 | if (!kvm_check_extension(s, list->value)) { | |
685 | return list; | |
686 | } | |
687 | list++; | |
688 | } | |
689 | return NULL; | |
690 | } | |
691 | ||
692 | static void kvm_set_phys_mem(KVMMemoryListener *kml, | |
693 | MemoryRegionSection *section, bool add) | |
694 | { | |
695 | KVMState *s = kvm_state; | |
696 | KVMSlot *mem, old; | |
697 | int err; | |
698 | MemoryRegion *mr = section->mr; | |
699 | bool writeable = !mr->readonly && !mr->rom_device; | |
700 | hwaddr start_addr = section->offset_within_address_space; | |
701 | ram_addr_t size = int128_get64(section->size); | |
702 | void *ram = NULL; | |
703 | unsigned delta; | |
704 | ||
705 | /* kvm works in page size chunks, but the function may be called | |
706 | with sub-page size and unaligned start address. Pad the start | |
707 | address to next and truncate size to previous page boundary. */ | |
708 | delta = qemu_real_host_page_size - (start_addr & ~qemu_real_host_page_mask); | |
709 | delta &= ~qemu_real_host_page_mask; | |
710 | if (delta > size) { | |
711 | return; | |
712 | } | |
713 | start_addr += delta; | |
714 | size -= delta; | |
715 | size &= qemu_real_host_page_mask; | |
716 | if (!size || (start_addr & ~qemu_real_host_page_mask)) { | |
717 | return; | |
718 | } | |
719 | ||
720 | if (!memory_region_is_ram(mr)) { | |
721 | if (writeable || !kvm_readonly_mem_allowed) { | |
722 | return; | |
723 | } else if (!mr->romd_mode) { | |
724 | /* If the memory device is not in romd_mode, then we actually want | |
725 | * to remove the kvm memory slot so all accesses will trap. */ | |
726 | add = false; | |
727 | } | |
728 | } | |
729 | ||
730 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta; | |
731 | ||
732 | while (1) { | |
733 | mem = kvm_lookup_overlapping_slot(kml, start_addr, start_addr + size); | |
734 | if (!mem) { | |
735 | break; | |
736 | } | |
737 | ||
738 | if (add && start_addr >= mem->start_addr && | |
739 | (start_addr + size <= mem->start_addr + mem->memory_size) && | |
740 | (ram - start_addr == mem->ram - mem->start_addr)) { | |
741 | /* The new slot fits into the existing one and comes with | |
742 | * identical parameters - update flags and done. */ | |
743 | kvm_slot_update_flags(kml, mem, mr); | |
744 | return; | |
745 | } | |
746 | ||
747 | old = *mem; | |
748 | ||
749 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
750 | kvm_physical_sync_dirty_bitmap(kml, section); | |
751 | } | |
752 | ||
753 | /* unregister the overlapping slot */ | |
754 | mem->memory_size = 0; | |
755 | err = kvm_set_user_memory_region(kml, mem); | |
756 | if (err) { | |
757 | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n", | |
758 | __func__, strerror(-err)); | |
759 | abort(); | |
760 | } | |
761 | ||
762 | /* Workaround for older KVM versions: we can't join slots, even not by | |
763 | * unregistering the previous ones and then registering the larger | |
764 | * slot. We have to maintain the existing fragmentation. Sigh. | |
765 | * | |
766 | * This workaround assumes that the new slot starts at the same | |
767 | * address as the first existing one. If not or if some overlapping | |
768 | * slot comes around later, we will fail (not seen in practice so far) | |
769 | * - and actually require a recent KVM version. */ | |
770 | if (s->broken_set_mem_region && | |
771 | old.start_addr == start_addr && old.memory_size < size && add) { | |
772 | mem = kvm_alloc_slot(kml); | |
773 | mem->memory_size = old.memory_size; | |
774 | mem->start_addr = old.start_addr; | |
775 | mem->ram = old.ram; | |
776 | mem->flags = kvm_mem_flags(mr); | |
777 | ||
778 | err = kvm_set_user_memory_region(kml, mem); | |
779 | if (err) { | |
780 | fprintf(stderr, "%s: error updating slot: %s\n", __func__, | |
781 | strerror(-err)); | |
782 | abort(); | |
783 | } | |
784 | ||
785 | start_addr += old.memory_size; | |
786 | ram += old.memory_size; | |
787 | size -= old.memory_size; | |
788 | continue; | |
789 | } | |
790 | ||
791 | /* register prefix slot */ | |
792 | if (old.start_addr < start_addr) { | |
793 | mem = kvm_alloc_slot(kml); | |
794 | mem->memory_size = start_addr - old.start_addr; | |
795 | mem->start_addr = old.start_addr; | |
796 | mem->ram = old.ram; | |
797 | mem->flags = kvm_mem_flags(mr); | |
798 | ||
799 | err = kvm_set_user_memory_region(kml, mem); | |
800 | if (err) { | |
801 | fprintf(stderr, "%s: error registering prefix slot: %s\n", | |
802 | __func__, strerror(-err)); | |
803 | #ifdef TARGET_PPC | |
804 | fprintf(stderr, "%s: This is probably because your kernel's " \ | |
805 | "PAGE_SIZE is too big. Please try to use 4k " \ | |
806 | "PAGE_SIZE!\n", __func__); | |
807 | #endif | |
808 | abort(); | |
809 | } | |
810 | } | |
811 | ||
812 | /* register suffix slot */ | |
813 | if (old.start_addr + old.memory_size > start_addr + size) { | |
814 | ram_addr_t size_delta; | |
815 | ||
816 | mem = kvm_alloc_slot(kml); | |
817 | mem->start_addr = start_addr + size; | |
818 | size_delta = mem->start_addr - old.start_addr; | |
819 | mem->memory_size = old.memory_size - size_delta; | |
820 | mem->ram = old.ram + size_delta; | |
821 | mem->flags = kvm_mem_flags(mr); | |
822 | ||
823 | err = kvm_set_user_memory_region(kml, mem); | |
824 | if (err) { | |
825 | fprintf(stderr, "%s: error registering suffix slot: %s\n", | |
826 | __func__, strerror(-err)); | |
827 | abort(); | |
828 | } | |
829 | } | |
830 | } | |
831 | ||
832 | /* in case the KVM bug workaround already "consumed" the new slot */ | |
833 | if (!size) { | |
834 | return; | |
835 | } | |
836 | if (!add) { | |
837 | return; | |
838 | } | |
839 | mem = kvm_alloc_slot(kml); | |
840 | mem->memory_size = size; | |
841 | mem->start_addr = start_addr; | |
842 | mem->ram = ram; | |
843 | mem->flags = kvm_mem_flags(mr); | |
844 | ||
845 | err = kvm_set_user_memory_region(kml, mem); | |
846 | if (err) { | |
847 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
848 | strerror(-err)); | |
849 | abort(); | |
850 | } | |
851 | } | |
852 | ||
853 | static void kvm_region_add(MemoryListener *listener, | |
854 | MemoryRegionSection *section) | |
855 | { | |
856 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
857 | ||
858 | memory_region_ref(section->mr); | |
859 | kvm_set_phys_mem(kml, section, true); | |
860 | } | |
861 | ||
862 | static void kvm_region_del(MemoryListener *listener, | |
863 | MemoryRegionSection *section) | |
864 | { | |
865 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
866 | ||
867 | kvm_set_phys_mem(kml, section, false); | |
868 | memory_region_unref(section->mr); | |
869 | } | |
870 | ||
871 | static void kvm_log_sync(MemoryListener *listener, | |
872 | MemoryRegionSection *section) | |
873 | { | |
874 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
875 | int r; | |
876 | ||
877 | r = kvm_physical_sync_dirty_bitmap(kml, section); | |
878 | if (r < 0) { | |
879 | abort(); | |
880 | } | |
881 | } | |
882 | ||
883 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, | |
884 | MemoryRegionSection *section, | |
885 | bool match_data, uint64_t data, | |
886 | EventNotifier *e) | |
887 | { | |
888 | int fd = event_notifier_get_fd(e); | |
889 | int r; | |
890 | ||
891 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, | |
892 | data, true, int128_get64(section->size), | |
893 | match_data); | |
894 | if (r < 0) { | |
895 | fprintf(stderr, "%s: error adding ioeventfd: %s\n", | |
896 | __func__, strerror(-r)); | |
897 | abort(); | |
898 | } | |
899 | } | |
900 | ||
901 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, | |
902 | MemoryRegionSection *section, | |
903 | bool match_data, uint64_t data, | |
904 | EventNotifier *e) | |
905 | { | |
906 | int fd = event_notifier_get_fd(e); | |
907 | int r; | |
908 | ||
909 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, | |
910 | data, false, int128_get64(section->size), | |
911 | match_data); | |
912 | if (r < 0) { | |
913 | abort(); | |
914 | } | |
915 | } | |
916 | ||
917 | static void kvm_io_ioeventfd_add(MemoryListener *listener, | |
918 | MemoryRegionSection *section, | |
919 | bool match_data, uint64_t data, | |
920 | EventNotifier *e) | |
921 | { | |
922 | int fd = event_notifier_get_fd(e); | |
923 | int r; | |
924 | ||
925 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, | |
926 | data, true, int128_get64(section->size), | |
927 | match_data); | |
928 | if (r < 0) { | |
929 | fprintf(stderr, "%s: error adding ioeventfd: %s\n", | |
930 | __func__, strerror(-r)); | |
931 | abort(); | |
932 | } | |
933 | } | |
934 | ||
935 | static void kvm_io_ioeventfd_del(MemoryListener *listener, | |
936 | MemoryRegionSection *section, | |
937 | bool match_data, uint64_t data, | |
938 | EventNotifier *e) | |
939 | ||
940 | { | |
941 | int fd = event_notifier_get_fd(e); | |
942 | int r; | |
943 | ||
944 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, | |
945 | data, false, int128_get64(section->size), | |
946 | match_data); | |
947 | if (r < 0) { | |
948 | abort(); | |
949 | } | |
950 | } | |
951 | ||
952 | void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, | |
953 | AddressSpace *as, int as_id) | |
954 | { | |
955 | int i; | |
956 | ||
957 | kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); | |
958 | kml->as_id = as_id; | |
959 | ||
960 | for (i = 0; i < s->nr_slots; i++) { | |
961 | kml->slots[i].slot = i; | |
962 | } | |
963 | ||
964 | kml->listener.region_add = kvm_region_add; | |
965 | kml->listener.region_del = kvm_region_del; | |
966 | kml->listener.log_start = kvm_log_start; | |
967 | kml->listener.log_stop = kvm_log_stop; | |
968 | kml->listener.log_sync = kvm_log_sync; | |
969 | kml->listener.priority = 10; | |
970 | ||
971 | memory_listener_register(&kml->listener, as); | |
972 | } | |
973 | ||
974 | static MemoryListener kvm_io_listener = { | |
975 | .eventfd_add = kvm_io_ioeventfd_add, | |
976 | .eventfd_del = kvm_io_ioeventfd_del, | |
977 | .priority = 10, | |
978 | }; | |
979 | ||
980 | static void kvm_handle_interrupt(CPUState *cpu, int mask) | |
981 | { | |
982 | cpu->interrupt_request |= mask; | |
983 | ||
984 | if (!qemu_cpu_is_self(cpu)) { | |
985 | qemu_cpu_kick(cpu); | |
986 | } | |
987 | } | |
988 | ||
989 | int kvm_set_irq(KVMState *s, int irq, int level) | |
990 | { | |
991 | struct kvm_irq_level event; | |
992 | int ret; | |
993 | ||
994 | assert(kvm_async_interrupts_enabled()); | |
995 | ||
996 | event.level = level; | |
997 | event.irq = irq; | |
998 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); | |
999 | if (ret < 0) { | |
1000 | perror("kvm_set_irq"); | |
1001 | abort(); | |
1002 | } | |
1003 | ||
1004 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; | |
1005 | } | |
1006 | ||
1007 | #ifdef KVM_CAP_IRQ_ROUTING | |
1008 | typedef struct KVMMSIRoute { | |
1009 | struct kvm_irq_routing_entry kroute; | |
1010 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
1011 | } KVMMSIRoute; | |
1012 | ||
1013 | static void set_gsi(KVMState *s, unsigned int gsi) | |
1014 | { | |
1015 | set_bit(gsi, s->used_gsi_bitmap); | |
1016 | } | |
1017 | ||
1018 | static void clear_gsi(KVMState *s, unsigned int gsi) | |
1019 | { | |
1020 | clear_bit(gsi, s->used_gsi_bitmap); | |
1021 | } | |
1022 | ||
1023 | void kvm_init_irq_routing(KVMState *s) | |
1024 | { | |
1025 | int gsi_count, i; | |
1026 | ||
1027 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; | |
1028 | if (gsi_count > 0) { | |
1029 | /* Round up so we can search ints using ffs */ | |
1030 | s->used_gsi_bitmap = bitmap_new(gsi_count); | |
1031 | s->gsi_count = gsi_count; | |
1032 | } | |
1033 | ||
1034 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
1035 | s->nr_allocated_irq_routes = 0; | |
1036 | ||
1037 | if (!kvm_direct_msi_allowed) { | |
1038 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { | |
1039 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | kvm_arch_init_irq_routing(s); | |
1044 | } | |
1045 | ||
1046 | void kvm_irqchip_commit_routes(KVMState *s) | |
1047 | { | |
1048 | int ret; | |
1049 | ||
1050 | s->irq_routes->flags = 0; | |
1051 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); | |
1052 | assert(ret == 0); | |
1053 | } | |
1054 | ||
1055 | static void kvm_add_routing_entry(KVMState *s, | |
1056 | struct kvm_irq_routing_entry *entry) | |
1057 | { | |
1058 | struct kvm_irq_routing_entry *new; | |
1059 | int n, size; | |
1060 | ||
1061 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
1062 | n = s->nr_allocated_irq_routes * 2; | |
1063 | if (n < 64) { | |
1064 | n = 64; | |
1065 | } | |
1066 | size = sizeof(struct kvm_irq_routing); | |
1067 | size += n * sizeof(*new); | |
1068 | s->irq_routes = g_realloc(s->irq_routes, size); | |
1069 | s->nr_allocated_irq_routes = n; | |
1070 | } | |
1071 | n = s->irq_routes->nr++; | |
1072 | new = &s->irq_routes->entries[n]; | |
1073 | ||
1074 | *new = *entry; | |
1075 | ||
1076 | set_gsi(s, entry->gsi); | |
1077 | } | |
1078 | ||
1079 | static int kvm_update_routing_entry(KVMState *s, | |
1080 | struct kvm_irq_routing_entry *new_entry) | |
1081 | { | |
1082 | struct kvm_irq_routing_entry *entry; | |
1083 | int n; | |
1084 | ||
1085 | for (n = 0; n < s->irq_routes->nr; n++) { | |
1086 | entry = &s->irq_routes->entries[n]; | |
1087 | if (entry->gsi != new_entry->gsi) { | |
1088 | continue; | |
1089 | } | |
1090 | ||
1091 | if(!memcmp(entry, new_entry, sizeof *entry)) { | |
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | *entry = *new_entry; | |
1096 | ||
1097 | kvm_irqchip_commit_routes(s); | |
1098 | ||
1099 | return 0; | |
1100 | } | |
1101 | ||
1102 | return -ESRCH; | |
1103 | } | |
1104 | ||
1105 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) | |
1106 | { | |
1107 | struct kvm_irq_routing_entry e = {}; | |
1108 | ||
1109 | assert(pin < s->gsi_count); | |
1110 | ||
1111 | e.gsi = irq; | |
1112 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1113 | e.flags = 0; | |
1114 | e.u.irqchip.irqchip = irqchip; | |
1115 | e.u.irqchip.pin = pin; | |
1116 | kvm_add_routing_entry(s, &e); | |
1117 | } | |
1118 | ||
1119 | void kvm_irqchip_release_virq(KVMState *s, int virq) | |
1120 | { | |
1121 | struct kvm_irq_routing_entry *e; | |
1122 | int i; | |
1123 | ||
1124 | if (kvm_gsi_direct_mapping()) { | |
1125 | return; | |
1126 | } | |
1127 | ||
1128 | for (i = 0; i < s->irq_routes->nr; i++) { | |
1129 | e = &s->irq_routes->entries[i]; | |
1130 | if (e->gsi == virq) { | |
1131 | s->irq_routes->nr--; | |
1132 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1133 | } | |
1134 | } | |
1135 | clear_gsi(s, virq); | |
1136 | } | |
1137 | ||
1138 | static unsigned int kvm_hash_msi(uint32_t data) | |
1139 | { | |
1140 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1141 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1142 | return data & 0xff; | |
1143 | } | |
1144 | ||
1145 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1146 | { | |
1147 | KVMMSIRoute *route, *next; | |
1148 | unsigned int hash; | |
1149 | ||
1150 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1151 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1152 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1153 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1154 | g_free(route); | |
1155 | } | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | static int kvm_irqchip_get_virq(KVMState *s) | |
1160 | { | |
1161 | int next_virq; | |
1162 | ||
1163 | /* | |
1164 | * PIC and IOAPIC share the first 16 GSI numbers, thus the available | |
1165 | * GSI numbers are more than the number of IRQ route. Allocating a GSI | |
1166 | * number can succeed even though a new route entry cannot be added. | |
1167 | * When this happens, flush dynamic MSI entries to free IRQ route entries. | |
1168 | */ | |
1169 | if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) { | |
1170 | kvm_flush_dynamic_msi_routes(s); | |
1171 | } | |
1172 | ||
1173 | /* Return the lowest unused GSI in the bitmap */ | |
1174 | next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count); | |
1175 | if (next_virq >= s->gsi_count) { | |
1176 | return -ENOSPC; | |
1177 | } else { | |
1178 | return next_virq; | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1183 | { | |
1184 | unsigned int hash = kvm_hash_msi(msg.data); | |
1185 | KVMMSIRoute *route; | |
1186 | ||
1187 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1188 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1189 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
1190 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { | |
1191 | return route; | |
1192 | } | |
1193 | } | |
1194 | return NULL; | |
1195 | } | |
1196 | ||
1197 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1198 | { | |
1199 | struct kvm_msi msi; | |
1200 | KVMMSIRoute *route; | |
1201 | ||
1202 | if (kvm_direct_msi_allowed) { | |
1203 | msi.address_lo = (uint32_t)msg.address; | |
1204 | msi.address_hi = msg.address >> 32; | |
1205 | msi.data = le32_to_cpu(msg.data); | |
1206 | msi.flags = 0; | |
1207 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1208 | ||
1209 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1210 | } | |
1211 | ||
1212 | route = kvm_lookup_msi_route(s, msg); | |
1213 | if (!route) { | |
1214 | int virq; | |
1215 | ||
1216 | virq = kvm_irqchip_get_virq(s); | |
1217 | if (virq < 0) { | |
1218 | return virq; | |
1219 | } | |
1220 | ||
1221 | route = g_malloc0(sizeof(KVMMSIRoute)); | |
1222 | route->kroute.gsi = virq; | |
1223 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1224 | route->kroute.flags = 0; | |
1225 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1226 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
1227 | route->kroute.u.msi.data = le32_to_cpu(msg.data); | |
1228 | ||
1229 | kvm_add_routing_entry(s, &route->kroute); | |
1230 | kvm_irqchip_commit_routes(s); | |
1231 | ||
1232 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1233 | entry); | |
1234 | } | |
1235 | ||
1236 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1237 | ||
1238 | return kvm_set_irq(s, route->kroute.gsi, 1); | |
1239 | } | |
1240 | ||
1241 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) | |
1242 | { | |
1243 | struct kvm_irq_routing_entry kroute = {}; | |
1244 | int virq; | |
1245 | MSIMessage msg = {0, 0}; | |
1246 | ||
1247 | if (dev) { | |
1248 | if (msix_enabled(dev)) { | |
1249 | msg = msix_get_message(dev, vector); | |
1250 | } else if (msi_enabled(dev)) { | |
1251 | msg = msi_get_message(dev, vector); | |
1252 | } else { | |
1253 | /* Should never happen */ | |
1254 | error_report("%s: unknown interrupt type", __func__); | |
1255 | abort(); | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | if (kvm_gsi_direct_mapping()) { | |
1260 | return kvm_arch_msi_data_to_gsi(msg.data); | |
1261 | } | |
1262 | ||
1263 | if (!kvm_gsi_routing_enabled()) { | |
1264 | return -ENOSYS; | |
1265 | } | |
1266 | ||
1267 | virq = kvm_irqchip_get_virq(s); | |
1268 | if (virq < 0) { | |
1269 | return virq; | |
1270 | } | |
1271 | ||
1272 | kroute.gsi = virq; | |
1273 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1274 | kroute.flags = 0; | |
1275 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1276 | kroute.u.msi.address_hi = msg.address >> 32; | |
1277 | kroute.u.msi.data = le32_to_cpu(msg.data); | |
1278 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { | |
1279 | kvm_irqchip_release_virq(s, virq); | |
1280 | return -EINVAL; | |
1281 | } | |
1282 | ||
1283 | kvm_add_routing_entry(s, &kroute); | |
1284 | kvm_irqchip_commit_routes(s); | |
1285 | ||
1286 | return virq; | |
1287 | } | |
1288 | ||
1289 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, | |
1290 | PCIDevice *dev) | |
1291 | { | |
1292 | struct kvm_irq_routing_entry kroute = {}; | |
1293 | ||
1294 | if (kvm_gsi_direct_mapping()) { | |
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | if (!kvm_irqchip_in_kernel()) { | |
1299 | return -ENOSYS; | |
1300 | } | |
1301 | ||
1302 | kroute.gsi = virq; | |
1303 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1304 | kroute.flags = 0; | |
1305 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1306 | kroute.u.msi.address_hi = msg.address >> 32; | |
1307 | kroute.u.msi.data = le32_to_cpu(msg.data); | |
1308 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { | |
1309 | return -EINVAL; | |
1310 | } | |
1311 | ||
1312 | return kvm_update_routing_entry(s, &kroute); | |
1313 | } | |
1314 | ||
1315 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, | |
1316 | bool assign) | |
1317 | { | |
1318 | struct kvm_irqfd irqfd = { | |
1319 | .fd = fd, | |
1320 | .gsi = virq, | |
1321 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
1322 | }; | |
1323 | ||
1324 | if (rfd != -1) { | |
1325 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
1326 | irqfd.resamplefd = rfd; | |
1327 | } | |
1328 | ||
1329 | if (!kvm_irqfds_enabled()) { | |
1330 | return -ENOSYS; | |
1331 | } | |
1332 | ||
1333 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
1334 | } | |
1335 | ||
1336 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) | |
1337 | { | |
1338 | struct kvm_irq_routing_entry kroute = {}; | |
1339 | int virq; | |
1340 | ||
1341 | if (!kvm_gsi_routing_enabled()) { | |
1342 | return -ENOSYS; | |
1343 | } | |
1344 | ||
1345 | virq = kvm_irqchip_get_virq(s); | |
1346 | if (virq < 0) { | |
1347 | return virq; | |
1348 | } | |
1349 | ||
1350 | kroute.gsi = virq; | |
1351 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
1352 | kroute.flags = 0; | |
1353 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
1354 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
1355 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
1356 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
1357 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
1358 | ||
1359 | kvm_add_routing_entry(s, &kroute); | |
1360 | ||
1361 | return virq; | |
1362 | } | |
1363 | ||
1364 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) | |
1365 | { | |
1366 | struct kvm_irq_routing_entry kroute = {}; | |
1367 | int virq; | |
1368 | ||
1369 | if (!kvm_gsi_routing_enabled()) { | |
1370 | return -ENOSYS; | |
1371 | } | |
1372 | if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) { | |
1373 | return -ENOSYS; | |
1374 | } | |
1375 | virq = kvm_irqchip_get_virq(s); | |
1376 | if (virq < 0) { | |
1377 | return virq; | |
1378 | } | |
1379 | ||
1380 | kroute.gsi = virq; | |
1381 | kroute.type = KVM_IRQ_ROUTING_HV_SINT; | |
1382 | kroute.flags = 0; | |
1383 | kroute.u.hv_sint.vcpu = vcpu; | |
1384 | kroute.u.hv_sint.sint = sint; | |
1385 | ||
1386 | kvm_add_routing_entry(s, &kroute); | |
1387 | kvm_irqchip_commit_routes(s); | |
1388 | ||
1389 | return virq; | |
1390 | } | |
1391 | ||
1392 | #else /* !KVM_CAP_IRQ_ROUTING */ | |
1393 | ||
1394 | void kvm_init_irq_routing(KVMState *s) | |
1395 | { | |
1396 | } | |
1397 | ||
1398 | void kvm_irqchip_release_virq(KVMState *s, int virq) | |
1399 | { | |
1400 | } | |
1401 | ||
1402 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1403 | { | |
1404 | abort(); | |
1405 | } | |
1406 | ||
1407 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) | |
1408 | { | |
1409 | return -ENOSYS; | |
1410 | } | |
1411 | ||
1412 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) | |
1413 | { | |
1414 | return -ENOSYS; | |
1415 | } | |
1416 | ||
1417 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) | |
1418 | { | |
1419 | return -ENOSYS; | |
1420 | } | |
1421 | ||
1422 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) | |
1423 | { | |
1424 | abort(); | |
1425 | } | |
1426 | ||
1427 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
1428 | { | |
1429 | return -ENOSYS; | |
1430 | } | |
1431 | #endif /* !KVM_CAP_IRQ_ROUTING */ | |
1432 | ||
1433 | int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, | |
1434 | EventNotifier *rn, int virq) | |
1435 | { | |
1436 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), | |
1437 | rn ? event_notifier_get_fd(rn) : -1, virq, true); | |
1438 | } | |
1439 | ||
1440 | int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, | |
1441 | int virq) | |
1442 | { | |
1443 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq, | |
1444 | false); | |
1445 | } | |
1446 | ||
1447 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, | |
1448 | EventNotifier *rn, qemu_irq irq) | |
1449 | { | |
1450 | gpointer key, gsi; | |
1451 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1452 | ||
1453 | if (!found) { | |
1454 | return -ENXIO; | |
1455 | } | |
1456 | return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi)); | |
1457 | } | |
1458 | ||
1459 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, | |
1460 | qemu_irq irq) | |
1461 | { | |
1462 | gpointer key, gsi; | |
1463 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1464 | ||
1465 | if (!found) { | |
1466 | return -ENXIO; | |
1467 | } | |
1468 | return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); | |
1469 | } | |
1470 | ||
1471 | void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) | |
1472 | { | |
1473 | g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); | |
1474 | } | |
1475 | ||
1476 | static void kvm_irqchip_create(MachineState *machine, KVMState *s) | |
1477 | { | |
1478 | int ret; | |
1479 | ||
1480 | if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) { | |
1481 | ; | |
1482 | } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) { | |
1483 | ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0); | |
1484 | if (ret < 0) { | |
1485 | fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret)); | |
1486 | exit(1); | |
1487 | } | |
1488 | } else { | |
1489 | return; | |
1490 | } | |
1491 | ||
1492 | /* First probe and see if there's a arch-specific hook to create the | |
1493 | * in-kernel irqchip for us */ | |
1494 | ret = kvm_arch_irqchip_create(machine, s); | |
1495 | if (ret == 0) { | |
1496 | if (machine_kernel_irqchip_split(machine)) { | |
1497 | perror("Split IRQ chip mode not supported."); | |
1498 | exit(1); | |
1499 | } else { | |
1500 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1501 | } | |
1502 | } | |
1503 | if (ret < 0) { | |
1504 | fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret)); | |
1505 | exit(1); | |
1506 | } | |
1507 | ||
1508 | kvm_kernel_irqchip = true; | |
1509 | /* If we have an in-kernel IRQ chip then we must have asynchronous | |
1510 | * interrupt delivery (though the reverse is not necessarily true) | |
1511 | */ | |
1512 | kvm_async_interrupts_allowed = true; | |
1513 | kvm_halt_in_kernel_allowed = true; | |
1514 | ||
1515 | kvm_init_irq_routing(s); | |
1516 | ||
1517 | s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); | |
1518 | } | |
1519 | ||
1520 | /* Find number of supported CPUs using the recommended | |
1521 | * procedure from the kernel API documentation to cope with | |
1522 | * older kernels that may be missing capabilities. | |
1523 | */ | |
1524 | static int kvm_recommended_vcpus(KVMState *s) | |
1525 | { | |
1526 | int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS); | |
1527 | return (ret) ? ret : 4; | |
1528 | } | |
1529 | ||
1530 | static int kvm_max_vcpus(KVMState *s) | |
1531 | { | |
1532 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
1533 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
1534 | } | |
1535 | ||
1536 | static int kvm_max_vcpu_id(KVMState *s) | |
1537 | { | |
1538 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID); | |
1539 | return (ret) ? ret : kvm_max_vcpus(s); | |
1540 | } | |
1541 | ||
1542 | bool kvm_vcpu_id_is_valid(int vcpu_id) | |
1543 | { | |
1544 | KVMState *s = KVM_STATE(current_machine->accelerator); | |
1545 | return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s); | |
1546 | } | |
1547 | ||
1548 | static int kvm_init(MachineState *ms) | |
1549 | { | |
1550 | MachineClass *mc = MACHINE_GET_CLASS(ms); | |
1551 | static const char upgrade_note[] = | |
1552 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1553 | "(see http://sourceforge.net/projects/kvm).\n"; | |
1554 | struct { | |
1555 | const char *name; | |
1556 | int num; | |
1557 | } num_cpus[] = { | |
1558 | { "SMP", smp_cpus }, | |
1559 | { "hotpluggable", max_cpus }, | |
1560 | { NULL, } | |
1561 | }, *nc = num_cpus; | |
1562 | int soft_vcpus_limit, hard_vcpus_limit; | |
1563 | KVMState *s; | |
1564 | const KVMCapabilityInfo *missing_cap; | |
1565 | int ret; | |
1566 | int type = 0; | |
1567 | const char *kvm_type; | |
1568 | ||
1569 | s = KVM_STATE(ms->accelerator); | |
1570 | ||
1571 | /* | |
1572 | * On systems where the kernel can support different base page | |
1573 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
1574 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
1575 | * page size for the system though. | |
1576 | */ | |
1577 | assert(TARGET_PAGE_SIZE <= getpagesize()); | |
1578 | ||
1579 | s->sigmask_len = 8; | |
1580 | ||
1581 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
1582 | QTAILQ_INIT(&s->kvm_sw_breakpoints); | |
1583 | #endif | |
1584 | QLIST_INIT(&s->kvm_parked_vcpus); | |
1585 | s->vmfd = -1; | |
1586 | s->fd = qemu_open("/dev/kvm", O_RDWR); | |
1587 | if (s->fd == -1) { | |
1588 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
1589 | ret = -errno; | |
1590 | goto err; | |
1591 | } | |
1592 | ||
1593 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
1594 | if (ret < KVM_API_VERSION) { | |
1595 | if (ret >= 0) { | |
1596 | ret = -EINVAL; | |
1597 | } | |
1598 | fprintf(stderr, "kvm version too old\n"); | |
1599 | goto err; | |
1600 | } | |
1601 | ||
1602 | if (ret > KVM_API_VERSION) { | |
1603 | ret = -EINVAL; | |
1604 | fprintf(stderr, "kvm version not supported\n"); | |
1605 | goto err; | |
1606 | } | |
1607 | ||
1608 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); | |
1609 | ||
1610 | /* If unspecified, use the default value */ | |
1611 | if (!s->nr_slots) { | |
1612 | s->nr_slots = 32; | |
1613 | } | |
1614 | ||
1615 | /* check the vcpu limits */ | |
1616 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
1617 | hard_vcpus_limit = kvm_max_vcpus(s); | |
1618 | ||
1619 | while (nc->name) { | |
1620 | if (nc->num > soft_vcpus_limit) { | |
1621 | fprintf(stderr, | |
1622 | "Warning: Number of %s cpus requested (%d) exceeds " | |
1623 | "the recommended cpus supported by KVM (%d)\n", | |
1624 | nc->name, nc->num, soft_vcpus_limit); | |
1625 | ||
1626 | if (nc->num > hard_vcpus_limit) { | |
1627 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " | |
1628 | "the maximum cpus supported by KVM (%d)\n", | |
1629 | nc->name, nc->num, hard_vcpus_limit); | |
1630 | exit(1); | |
1631 | } | |
1632 | } | |
1633 | nc++; | |
1634 | } | |
1635 | ||
1636 | kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type"); | |
1637 | if (mc->kvm_type) { | |
1638 | type = mc->kvm_type(kvm_type); | |
1639 | } else if (kvm_type) { | |
1640 | ret = -EINVAL; | |
1641 | fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type); | |
1642 | goto err; | |
1643 | } | |
1644 | ||
1645 | do { | |
1646 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); | |
1647 | } while (ret == -EINTR); | |
1648 | ||
1649 | if (ret < 0) { | |
1650 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, | |
1651 | strerror(-ret)); | |
1652 | ||
1653 | #ifdef TARGET_S390X | |
1654 | if (ret == -EINVAL) { | |
1655 | fprintf(stderr, | |
1656 | "Host kernel setup problem detected. Please verify:\n"); | |
1657 | fprintf(stderr, "- for kernels supporting the switch_amode or" | |
1658 | " user_mode parameters, whether\n"); | |
1659 | fprintf(stderr, | |
1660 | " user space is running in primary address space\n"); | |
1661 | fprintf(stderr, | |
1662 | "- for kernels supporting the vm.allocate_pgste sysctl, " | |
1663 | "whether it is enabled\n"); | |
1664 | } | |
1665 | #endif | |
1666 | goto err; | |
1667 | } | |
1668 | ||
1669 | s->vmfd = ret; | |
1670 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); | |
1671 | if (!missing_cap) { | |
1672 | missing_cap = | |
1673 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
1674 | } | |
1675 | if (missing_cap) { | |
1676 | ret = -EINVAL; | |
1677 | fprintf(stderr, "kvm does not support %s\n%s", | |
1678 | missing_cap->name, upgrade_note); | |
1679 | goto err; | |
1680 | } | |
1681 | ||
1682 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); | |
1683 | ||
1684 | s->broken_set_mem_region = 1; | |
1685 | ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); | |
1686 | if (ret > 0) { | |
1687 | s->broken_set_mem_region = 0; | |
1688 | } | |
1689 | ||
1690 | #ifdef KVM_CAP_VCPU_EVENTS | |
1691 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
1692 | #endif | |
1693 | ||
1694 | s->robust_singlestep = | |
1695 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
1696 | ||
1697 | #ifdef KVM_CAP_DEBUGREGS | |
1698 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
1699 | #endif | |
1700 | ||
1701 | #ifdef KVM_CAP_IRQ_ROUTING | |
1702 | kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); | |
1703 | #endif | |
1704 | ||
1705 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); | |
1706 | ||
1707 | s->irq_set_ioctl = KVM_IRQ_LINE; | |
1708 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { | |
1709 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; | |
1710 | } | |
1711 | ||
1712 | #ifdef KVM_CAP_READONLY_MEM | |
1713 | kvm_readonly_mem_allowed = | |
1714 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
1715 | #endif | |
1716 | ||
1717 | kvm_eventfds_allowed = | |
1718 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
1719 | ||
1720 | kvm_irqfds_allowed = | |
1721 | (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); | |
1722 | ||
1723 | kvm_resamplefds_allowed = | |
1724 | (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); | |
1725 | ||
1726 | kvm_vm_attributes_allowed = | |
1727 | (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); | |
1728 | ||
1729 | kvm_ioeventfd_any_length_allowed = | |
1730 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0); | |
1731 | ||
1732 | ret = kvm_arch_init(ms, s); | |
1733 | if (ret < 0) { | |
1734 | goto err; | |
1735 | } | |
1736 | ||
1737 | if (machine_kernel_irqchip_allowed(ms)) { | |
1738 | kvm_irqchip_create(ms, s); | |
1739 | } | |
1740 | ||
1741 | kvm_state = s; | |
1742 | ||
1743 | if (kvm_eventfds_allowed) { | |
1744 | s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; | |
1745 | s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; | |
1746 | } | |
1747 | s->memory_listener.listener.coalesced_mmio_add = kvm_coalesce_mmio_region; | |
1748 | s->memory_listener.listener.coalesced_mmio_del = kvm_uncoalesce_mmio_region; | |
1749 | ||
1750 | kvm_memory_listener_register(s, &s->memory_listener, | |
1751 | &address_space_memory, 0); | |
1752 | memory_listener_register(&kvm_io_listener, | |
1753 | &address_space_io); | |
1754 | ||
1755 | s->many_ioeventfds = kvm_check_many_ioeventfds(); | |
1756 | ||
1757 | cpu_interrupt_handler = kvm_handle_interrupt; | |
1758 | ||
1759 | return 0; | |
1760 | ||
1761 | err: | |
1762 | assert(ret < 0); | |
1763 | if (s->vmfd >= 0) { | |
1764 | close(s->vmfd); | |
1765 | } | |
1766 | if (s->fd != -1) { | |
1767 | close(s->fd); | |
1768 | } | |
1769 | g_free(s->memory_listener.slots); | |
1770 | ||
1771 | return ret; | |
1772 | } | |
1773 | ||
1774 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) | |
1775 | { | |
1776 | s->sigmask_len = sigmask_len; | |
1777 | } | |
1778 | ||
1779 | static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, | |
1780 | int size, uint32_t count) | |
1781 | { | |
1782 | int i; | |
1783 | uint8_t *ptr = data; | |
1784 | ||
1785 | for (i = 0; i < count; i++) { | |
1786 | address_space_rw(&address_space_io, port, attrs, | |
1787 | ptr, size, | |
1788 | direction == KVM_EXIT_IO_OUT); | |
1789 | ptr += size; | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) | |
1794 | { | |
1795 | fprintf(stderr, "KVM internal error. Suberror: %d\n", | |
1796 | run->internal.suberror); | |
1797 | ||
1798 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { | |
1799 | int i; | |
1800 | ||
1801 | for (i = 0; i < run->internal.ndata; ++i) { | |
1802 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
1803 | i, (uint64_t)run->internal.data[i]); | |
1804 | } | |
1805 | } | |
1806 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { | |
1807 | fprintf(stderr, "emulation failure\n"); | |
1808 | if (!kvm_arch_stop_on_emulation_error(cpu)) { | |
1809 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); | |
1810 | return EXCP_INTERRUPT; | |
1811 | } | |
1812 | } | |
1813 | /* FIXME: Should trigger a qmp message to let management know | |
1814 | * something went wrong. | |
1815 | */ | |
1816 | return -1; | |
1817 | } | |
1818 | ||
1819 | void kvm_flush_coalesced_mmio_buffer(void) | |
1820 | { | |
1821 | KVMState *s = kvm_state; | |
1822 | ||
1823 | if (s->coalesced_flush_in_progress) { | |
1824 | return; | |
1825 | } | |
1826 | ||
1827 | s->coalesced_flush_in_progress = true; | |
1828 | ||
1829 | if (s->coalesced_mmio_ring) { | |
1830 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
1831 | while (ring->first != ring->last) { | |
1832 | struct kvm_coalesced_mmio *ent; | |
1833 | ||
1834 | ent = &ring->coalesced_mmio[ring->first]; | |
1835 | ||
1836 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
1837 | smp_wmb(); | |
1838 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; | |
1839 | } | |
1840 | } | |
1841 | ||
1842 | s->coalesced_flush_in_progress = false; | |
1843 | } | |
1844 | ||
1845 | static void do_kvm_cpu_synchronize_state(void *arg) | |
1846 | { | |
1847 | CPUState *cpu = arg; | |
1848 | ||
1849 | if (!cpu->kvm_vcpu_dirty) { | |
1850 | kvm_arch_get_registers(cpu); | |
1851 | cpu->kvm_vcpu_dirty = true; | |
1852 | } | |
1853 | } | |
1854 | ||
1855 | void kvm_cpu_synchronize_state(CPUState *cpu) | |
1856 | { | |
1857 | if (!cpu->kvm_vcpu_dirty) { | |
1858 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, cpu); | |
1859 | } | |
1860 | } | |
1861 | ||
1862 | static void do_kvm_cpu_synchronize_post_reset(void *arg) | |
1863 | { | |
1864 | CPUState *cpu = arg; | |
1865 | ||
1866 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); | |
1867 | cpu->kvm_vcpu_dirty = false; | |
1868 | } | |
1869 | ||
1870 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) | |
1871 | { | |
1872 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, cpu); | |
1873 | } | |
1874 | ||
1875 | static void do_kvm_cpu_synchronize_post_init(void *arg) | |
1876 | { | |
1877 | CPUState *cpu = arg; | |
1878 | ||
1879 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); | |
1880 | cpu->kvm_vcpu_dirty = false; | |
1881 | } | |
1882 | ||
1883 | void kvm_cpu_synchronize_post_init(CPUState *cpu) | |
1884 | { | |
1885 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, cpu); | |
1886 | } | |
1887 | ||
1888 | int kvm_cpu_exec(CPUState *cpu) | |
1889 | { | |
1890 | struct kvm_run *run = cpu->kvm_run; | |
1891 | int ret, run_ret; | |
1892 | ||
1893 | DPRINTF("kvm_cpu_exec()\n"); | |
1894 | ||
1895 | if (kvm_arch_process_async_events(cpu)) { | |
1896 | cpu->exit_request = 0; | |
1897 | return EXCP_HLT; | |
1898 | } | |
1899 | ||
1900 | qemu_mutex_unlock_iothread(); | |
1901 | ||
1902 | do { | |
1903 | MemTxAttrs attrs; | |
1904 | ||
1905 | if (cpu->kvm_vcpu_dirty) { | |
1906 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); | |
1907 | cpu->kvm_vcpu_dirty = false; | |
1908 | } | |
1909 | ||
1910 | kvm_arch_pre_run(cpu, run); | |
1911 | if (cpu->exit_request) { | |
1912 | DPRINTF("interrupt exit requested\n"); | |
1913 | /* | |
1914 | * KVM requires us to reenter the kernel after IO exits to complete | |
1915 | * instruction emulation. This self-signal will ensure that we | |
1916 | * leave ASAP again. | |
1917 | */ | |
1918 | qemu_cpu_kick_self(); | |
1919 | } | |
1920 | ||
1921 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); | |
1922 | ||
1923 | attrs = kvm_arch_post_run(cpu, run); | |
1924 | ||
1925 | if (run_ret < 0) { | |
1926 | if (run_ret == -EINTR || run_ret == -EAGAIN) { | |
1927 | DPRINTF("io window exit\n"); | |
1928 | ret = EXCP_INTERRUPT; | |
1929 | break; | |
1930 | } | |
1931 | fprintf(stderr, "error: kvm run failed %s\n", | |
1932 | strerror(-run_ret)); | |
1933 | #ifdef TARGET_PPC | |
1934 | if (run_ret == -EBUSY) { | |
1935 | fprintf(stderr, | |
1936 | "This is probably because your SMT is enabled.\n" | |
1937 | "VCPU can only run on primary threads with all " | |
1938 | "secondary threads offline.\n"); | |
1939 | } | |
1940 | #endif | |
1941 | ret = -1; | |
1942 | break; | |
1943 | } | |
1944 | ||
1945 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); | |
1946 | switch (run->exit_reason) { | |
1947 | case KVM_EXIT_IO: | |
1948 | DPRINTF("handle_io\n"); | |
1949 | /* Called outside BQL */ | |
1950 | kvm_handle_io(run->io.port, attrs, | |
1951 | (uint8_t *)run + run->io.data_offset, | |
1952 | run->io.direction, | |
1953 | run->io.size, | |
1954 | run->io.count); | |
1955 | ret = 0; | |
1956 | break; | |
1957 | case KVM_EXIT_MMIO: | |
1958 | DPRINTF("handle_mmio\n"); | |
1959 | /* Called outside BQL */ | |
1960 | address_space_rw(&address_space_memory, | |
1961 | run->mmio.phys_addr, attrs, | |
1962 | run->mmio.data, | |
1963 | run->mmio.len, | |
1964 | run->mmio.is_write); | |
1965 | ret = 0; | |
1966 | break; | |
1967 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
1968 | DPRINTF("irq_window_open\n"); | |
1969 | ret = EXCP_INTERRUPT; | |
1970 | break; | |
1971 | case KVM_EXIT_SHUTDOWN: | |
1972 | DPRINTF("shutdown\n"); | |
1973 | qemu_system_reset_request(); | |
1974 | ret = EXCP_INTERRUPT; | |
1975 | break; | |
1976 | case KVM_EXIT_UNKNOWN: | |
1977 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", | |
1978 | (uint64_t)run->hw.hardware_exit_reason); | |
1979 | ret = -1; | |
1980 | break; | |
1981 | case KVM_EXIT_INTERNAL_ERROR: | |
1982 | ret = kvm_handle_internal_error(cpu, run); | |
1983 | break; | |
1984 | case KVM_EXIT_SYSTEM_EVENT: | |
1985 | switch (run->system_event.type) { | |
1986 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
1987 | qemu_system_shutdown_request(); | |
1988 | ret = EXCP_INTERRUPT; | |
1989 | break; | |
1990 | case KVM_SYSTEM_EVENT_RESET: | |
1991 | qemu_system_reset_request(); | |
1992 | ret = EXCP_INTERRUPT; | |
1993 | break; | |
1994 | case KVM_SYSTEM_EVENT_CRASH: | |
1995 | qemu_mutex_lock_iothread(); | |
1996 | qemu_system_guest_panicked(); | |
1997 | qemu_mutex_unlock_iothread(); | |
1998 | ret = 0; | |
1999 | break; | |
2000 | default: | |
2001 | DPRINTF("kvm_arch_handle_exit\n"); | |
2002 | ret = kvm_arch_handle_exit(cpu, run); | |
2003 | break; | |
2004 | } | |
2005 | break; | |
2006 | default: | |
2007 | DPRINTF("kvm_arch_handle_exit\n"); | |
2008 | ret = kvm_arch_handle_exit(cpu, run); | |
2009 | break; | |
2010 | } | |
2011 | } while (ret == 0); | |
2012 | ||
2013 | qemu_mutex_lock_iothread(); | |
2014 | ||
2015 | if (ret < 0) { | |
2016 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); | |
2017 | vm_stop(RUN_STATE_INTERNAL_ERROR); | |
2018 | } | |
2019 | ||
2020 | cpu->exit_request = 0; | |
2021 | return ret; | |
2022 | } | |
2023 | ||
2024 | int kvm_ioctl(KVMState *s, int type, ...) | |
2025 | { | |
2026 | int ret; | |
2027 | void *arg; | |
2028 | va_list ap; | |
2029 | ||
2030 | va_start(ap, type); | |
2031 | arg = va_arg(ap, void *); | |
2032 | va_end(ap); | |
2033 | ||
2034 | trace_kvm_ioctl(type, arg); | |
2035 | ret = ioctl(s->fd, type, arg); | |
2036 | if (ret == -1) { | |
2037 | ret = -errno; | |
2038 | } | |
2039 | return ret; | |
2040 | } | |
2041 | ||
2042 | int kvm_vm_ioctl(KVMState *s, int type, ...) | |
2043 | { | |
2044 | int ret; | |
2045 | void *arg; | |
2046 | va_list ap; | |
2047 | ||
2048 | va_start(ap, type); | |
2049 | arg = va_arg(ap, void *); | |
2050 | va_end(ap); | |
2051 | ||
2052 | trace_kvm_vm_ioctl(type, arg); | |
2053 | ret = ioctl(s->vmfd, type, arg); | |
2054 | if (ret == -1) { | |
2055 | ret = -errno; | |
2056 | } | |
2057 | return ret; | |
2058 | } | |
2059 | ||
2060 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) | |
2061 | { | |
2062 | int ret; | |
2063 | void *arg; | |
2064 | va_list ap; | |
2065 | ||
2066 | va_start(ap, type); | |
2067 | arg = va_arg(ap, void *); | |
2068 | va_end(ap); | |
2069 | ||
2070 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); | |
2071 | ret = ioctl(cpu->kvm_fd, type, arg); | |
2072 | if (ret == -1) { | |
2073 | ret = -errno; | |
2074 | } | |
2075 | return ret; | |
2076 | } | |
2077 | ||
2078 | int kvm_device_ioctl(int fd, int type, ...) | |
2079 | { | |
2080 | int ret; | |
2081 | void *arg; | |
2082 | va_list ap; | |
2083 | ||
2084 | va_start(ap, type); | |
2085 | arg = va_arg(ap, void *); | |
2086 | va_end(ap); | |
2087 | ||
2088 | trace_kvm_device_ioctl(fd, type, arg); | |
2089 | ret = ioctl(fd, type, arg); | |
2090 | if (ret == -1) { | |
2091 | ret = -errno; | |
2092 | } | |
2093 | return ret; | |
2094 | } | |
2095 | ||
2096 | int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) | |
2097 | { | |
2098 | int ret; | |
2099 | struct kvm_device_attr attribute = { | |
2100 | .group = group, | |
2101 | .attr = attr, | |
2102 | }; | |
2103 | ||
2104 | if (!kvm_vm_attributes_allowed) { | |
2105 | return 0; | |
2106 | } | |
2107 | ||
2108 | ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); | |
2109 | /* kvm returns 0 on success for HAS_DEVICE_ATTR */ | |
2110 | return ret ? 0 : 1; | |
2111 | } | |
2112 | ||
2113 | int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) | |
2114 | { | |
2115 | struct kvm_device_attr attribute = { | |
2116 | .group = group, | |
2117 | .attr = attr, | |
2118 | .flags = 0, | |
2119 | }; | |
2120 | ||
2121 | return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; | |
2122 | } | |
2123 | ||
2124 | void kvm_device_access(int fd, int group, uint64_t attr, | |
2125 | void *val, bool write) | |
2126 | { | |
2127 | struct kvm_device_attr kvmattr; | |
2128 | int err; | |
2129 | ||
2130 | kvmattr.flags = 0; | |
2131 | kvmattr.group = group; | |
2132 | kvmattr.attr = attr; | |
2133 | kvmattr.addr = (uintptr_t)val; | |
2134 | ||
2135 | err = kvm_device_ioctl(fd, | |
2136 | write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, | |
2137 | &kvmattr); | |
2138 | if (err < 0) { | |
2139 | error_report("KVM_%s_DEVICE_ATTR failed: %s", | |
2140 | write ? "SET" : "GET", strerror(-err)); | |
2141 | error_printf("Group %d attr 0x%016" PRIx64, group, attr); | |
2142 | abort(); | |
2143 | } | |
2144 | } | |
2145 | ||
2146 | int kvm_has_sync_mmu(void) | |
2147 | { | |
2148 | return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); | |
2149 | } | |
2150 | ||
2151 | int kvm_has_vcpu_events(void) | |
2152 | { | |
2153 | return kvm_state->vcpu_events; | |
2154 | } | |
2155 | ||
2156 | int kvm_has_robust_singlestep(void) | |
2157 | { | |
2158 | return kvm_state->robust_singlestep; | |
2159 | } | |
2160 | ||
2161 | int kvm_has_debugregs(void) | |
2162 | { | |
2163 | return kvm_state->debugregs; | |
2164 | } | |
2165 | ||
2166 | int kvm_has_many_ioeventfds(void) | |
2167 | { | |
2168 | if (!kvm_enabled()) { | |
2169 | return 0; | |
2170 | } | |
2171 | return kvm_state->many_ioeventfds; | |
2172 | } | |
2173 | ||
2174 | int kvm_has_gsi_routing(void) | |
2175 | { | |
2176 | #ifdef KVM_CAP_IRQ_ROUTING | |
2177 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); | |
2178 | #else | |
2179 | return false; | |
2180 | #endif | |
2181 | } | |
2182 | ||
2183 | int kvm_has_intx_set_mask(void) | |
2184 | { | |
2185 | return kvm_state->intx_set_mask; | |
2186 | } | |
2187 | ||
2188 | void kvm_setup_guest_memory(void *start, size_t size) | |
2189 | { | |
2190 | if (!kvm_has_sync_mmu()) { | |
2191 | int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK); | |
2192 | ||
2193 | if (ret) { | |
2194 | perror("qemu_madvise"); | |
2195 | fprintf(stderr, | |
2196 | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n"); | |
2197 | exit(1); | |
2198 | } | |
2199 | } | |
2200 | } | |
2201 | ||
2202 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
2203 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, | |
2204 | target_ulong pc) | |
2205 | { | |
2206 | struct kvm_sw_breakpoint *bp; | |
2207 | ||
2208 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { | |
2209 | if (bp->pc == pc) { | |
2210 | return bp; | |
2211 | } | |
2212 | } | |
2213 | return NULL; | |
2214 | } | |
2215 | ||
2216 | int kvm_sw_breakpoints_active(CPUState *cpu) | |
2217 | { | |
2218 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); | |
2219 | } | |
2220 | ||
2221 | struct kvm_set_guest_debug_data { | |
2222 | struct kvm_guest_debug dbg; | |
2223 | CPUState *cpu; | |
2224 | int err; | |
2225 | }; | |
2226 | ||
2227 | static void kvm_invoke_set_guest_debug(void *data) | |
2228 | { | |
2229 | struct kvm_set_guest_debug_data *dbg_data = data; | |
2230 | ||
2231 | dbg_data->err = kvm_vcpu_ioctl(dbg_data->cpu, KVM_SET_GUEST_DEBUG, | |
2232 | &dbg_data->dbg); | |
2233 | } | |
2234 | ||
2235 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) | |
2236 | { | |
2237 | struct kvm_set_guest_debug_data data; | |
2238 | ||
2239 | data.dbg.control = reinject_trap; | |
2240 | ||
2241 | if (cpu->singlestep_enabled) { | |
2242 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; | |
2243 | } | |
2244 | kvm_arch_update_guest_debug(cpu, &data.dbg); | |
2245 | data.cpu = cpu; | |
2246 | ||
2247 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, &data); | |
2248 | return data.err; | |
2249 | } | |
2250 | ||
2251 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, | |
2252 | target_ulong len, int type) | |
2253 | { | |
2254 | struct kvm_sw_breakpoint *bp; | |
2255 | int err; | |
2256 | ||
2257 | if (type == GDB_BREAKPOINT_SW) { | |
2258 | bp = kvm_find_sw_breakpoint(cpu, addr); | |
2259 | if (bp) { | |
2260 | bp->use_count++; | |
2261 | return 0; | |
2262 | } | |
2263 | ||
2264 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); | |
2265 | bp->pc = addr; | |
2266 | bp->use_count = 1; | |
2267 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); | |
2268 | if (err) { | |
2269 | g_free(bp); | |
2270 | return err; | |
2271 | } | |
2272 | ||
2273 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); | |
2274 | } else { | |
2275 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
2276 | if (err) { | |
2277 | return err; | |
2278 | } | |
2279 | } | |
2280 | ||
2281 | CPU_FOREACH(cpu) { | |
2282 | err = kvm_update_guest_debug(cpu, 0); | |
2283 | if (err) { | |
2284 | return err; | |
2285 | } | |
2286 | } | |
2287 | return 0; | |
2288 | } | |
2289 | ||
2290 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, | |
2291 | target_ulong len, int type) | |
2292 | { | |
2293 | struct kvm_sw_breakpoint *bp; | |
2294 | int err; | |
2295 | ||
2296 | if (type == GDB_BREAKPOINT_SW) { | |
2297 | bp = kvm_find_sw_breakpoint(cpu, addr); | |
2298 | if (!bp) { | |
2299 | return -ENOENT; | |
2300 | } | |
2301 | ||
2302 | if (bp->use_count > 1) { | |
2303 | bp->use_count--; | |
2304 | return 0; | |
2305 | } | |
2306 | ||
2307 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); | |
2308 | if (err) { | |
2309 | return err; | |
2310 | } | |
2311 | ||
2312 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); | |
2313 | g_free(bp); | |
2314 | } else { | |
2315 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
2316 | if (err) { | |
2317 | return err; | |
2318 | } | |
2319 | } | |
2320 | ||
2321 | CPU_FOREACH(cpu) { | |
2322 | err = kvm_update_guest_debug(cpu, 0); | |
2323 | if (err) { | |
2324 | return err; | |
2325 | } | |
2326 | } | |
2327 | return 0; | |
2328 | } | |
2329 | ||
2330 | void kvm_remove_all_breakpoints(CPUState *cpu) | |
2331 | { | |
2332 | struct kvm_sw_breakpoint *bp, *next; | |
2333 | KVMState *s = cpu->kvm_state; | |
2334 | CPUState *tmpcpu; | |
2335 | ||
2336 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { | |
2337 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { | |
2338 | /* Try harder to find a CPU that currently sees the breakpoint. */ | |
2339 | CPU_FOREACH(tmpcpu) { | |
2340 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
2341 | break; | |
2342 | } | |
2343 | } | |
2344 | } | |
2345 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); | |
2346 | g_free(bp); | |
2347 | } | |
2348 | kvm_arch_remove_all_hw_breakpoints(); | |
2349 | ||
2350 | CPU_FOREACH(cpu) { | |
2351 | kvm_update_guest_debug(cpu, 0); | |
2352 | } | |
2353 | } | |
2354 | ||
2355 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2356 | ||
2357 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) | |
2358 | { | |
2359 | return -EINVAL; | |
2360 | } | |
2361 | ||
2362 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, | |
2363 | target_ulong len, int type) | |
2364 | { | |
2365 | return -EINVAL; | |
2366 | } | |
2367 | ||
2368 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, | |
2369 | target_ulong len, int type) | |
2370 | { | |
2371 | return -EINVAL; | |
2372 | } | |
2373 | ||
2374 | void kvm_remove_all_breakpoints(CPUState *cpu) | |
2375 | { | |
2376 | } | |
2377 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2378 | ||
2379 | int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) | |
2380 | { | |
2381 | KVMState *s = kvm_state; | |
2382 | struct kvm_signal_mask *sigmask; | |
2383 | int r; | |
2384 | ||
2385 | if (!sigset) { | |
2386 | return kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, NULL); | |
2387 | } | |
2388 | ||
2389 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); | |
2390 | ||
2391 | sigmask->len = s->sigmask_len; | |
2392 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); | |
2393 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); | |
2394 | g_free(sigmask); | |
2395 | ||
2396 | return r; | |
2397 | } | |
2398 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) | |
2399 | { | |
2400 | return kvm_arch_on_sigbus_vcpu(cpu, code, addr); | |
2401 | } | |
2402 | ||
2403 | int kvm_on_sigbus(int code, void *addr) | |
2404 | { | |
2405 | return kvm_arch_on_sigbus(code, addr); | |
2406 | } | |
2407 | ||
2408 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
2409 | { | |
2410 | int ret; | |
2411 | struct kvm_create_device create_dev; | |
2412 | ||
2413 | create_dev.type = type; | |
2414 | create_dev.fd = -1; | |
2415 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
2416 | ||
2417 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
2418 | return -ENOTSUP; | |
2419 | } | |
2420 | ||
2421 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
2422 | if (ret) { | |
2423 | return ret; | |
2424 | } | |
2425 | ||
2426 | return test ? 0 : create_dev.fd; | |
2427 | } | |
2428 | ||
2429 | bool kvm_device_supported(int vmfd, uint64_t type) | |
2430 | { | |
2431 | struct kvm_create_device create_dev = { | |
2432 | .type = type, | |
2433 | .fd = -1, | |
2434 | .flags = KVM_CREATE_DEVICE_TEST, | |
2435 | }; | |
2436 | ||
2437 | if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) { | |
2438 | return false; | |
2439 | } | |
2440 | ||
2441 | return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0); | |
2442 | } | |
2443 | ||
2444 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) | |
2445 | { | |
2446 | struct kvm_one_reg reg; | |
2447 | int r; | |
2448 | ||
2449 | reg.id = id; | |
2450 | reg.addr = (uintptr_t) source; | |
2451 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
2452 | if (r) { | |
2453 | trace_kvm_failed_reg_set(id, strerror(-r)); | |
2454 | } | |
2455 | return r; | |
2456 | } | |
2457 | ||
2458 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
2459 | { | |
2460 | struct kvm_one_reg reg; | |
2461 | int r; | |
2462 | ||
2463 | reg.id = id; | |
2464 | reg.addr = (uintptr_t) target; | |
2465 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
2466 | if (r) { | |
2467 | trace_kvm_failed_reg_get(id, strerror(-r)); | |
2468 | } | |
2469 | return r; | |
2470 | } | |
2471 | ||
2472 | static void kvm_accel_class_init(ObjectClass *oc, void *data) | |
2473 | { | |
2474 | AccelClass *ac = ACCEL_CLASS(oc); | |
2475 | ac->name = "KVM"; | |
2476 | ac->init_machine = kvm_init; | |
2477 | ac->allowed = &kvm_allowed; | |
2478 | } | |
2479 | ||
2480 | static const TypeInfo kvm_accel_type = { | |
2481 | .name = TYPE_KVM_ACCEL, | |
2482 | .parent = TYPE_ACCEL, | |
2483 | .class_init = kvm_accel_class_init, | |
2484 | .instance_size = sizeof(KVMState), | |
2485 | }; | |
2486 | ||
2487 | static void kvm_type_init(void) | |
2488 | { | |
2489 | type_register_static(&kvm_accel_type); | |
2490 | } | |
2491 | ||
2492 | type_init(kvm_type_init); |