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16#include "qemu/osdep.h"
17#include <sys/ioctl.h>
18
19#include <linux/kvm.h>
20
21#include "qemu/atomic.h"
22#include "qemu/option.h"
23#include "qemu/config-file.h"
24#include "qemu/error-report.h"
25#include "qapi/error.h"
26#include "hw/pci/msi.h"
27#include "hw/pci/msix.h"
28#include "hw/s390x/adapter.h"
29#include "exec/gdbstub.h"
30#include "sysemu/kvm_int.h"
31#include "sysemu/runstate.h"
32#include "sysemu/cpus.h"
33#include "sysemu/sysemu.h"
34#include "qemu/bswap.h"
35#include "exec/memory.h"
36#include "exec/ram_addr.h"
37#include "exec/address-spaces.h"
38#include "qemu/event_notifier.h"
39#include "qemu/main-loop.h"
40#include "trace.h"
41#include "hw/irq.h"
42#include "sysemu/sev.h"
43#include "qapi/visitor.h"
44#include "qapi/qapi-types-common.h"
45#include "qapi/qapi-visit-common.h"
46#include "sysemu/reset.h"
47#include "qemu/guest-random.h"
48#include "sysemu/hw_accel.h"
49#include "kvm-cpus.h"
50
51#include "hw/boards.h"
52
53
54#ifdef CONFIG_EVENTFD
55#include <sys/eventfd.h>
56#endif
57
58
59
60
61#define PAGE_SIZE qemu_real_host_page_size
62
63
64
65#ifdef DEBUG_KVM
66#define DPRINTF(fmt, ...) \
67 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
68#else
69#define DPRINTF(fmt, ...) \
70 do { } while (0)
71#endif
72
73#define KVM_MSI_HASHTAB_SIZE 256
74
75struct KVMParkedVcpu {
76 unsigned long vcpu_id;
77 int kvm_fd;
78 QLIST_ENTRY(KVMParkedVcpu) node;
79};
80
81struct KVMState
82{
83 AccelState parent_obj;
84
85 int nr_slots;
86 int fd;
87 int vmfd;
88 int coalesced_mmio;
89 int coalesced_pio;
90 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
91 bool coalesced_flush_in_progress;
92 int vcpu_events;
93 int robust_singlestep;
94 int debugregs;
95#ifdef KVM_CAP_SET_GUEST_DEBUG
96 QTAILQ_HEAD(, kvm_sw_breakpoint) kvm_sw_breakpoints;
97#endif
98 int max_nested_state_len;
99 int many_ioeventfds;
100 int intx_set_mask;
101 int kvm_shadow_mem;
102 bool kernel_irqchip_allowed;
103 bool kernel_irqchip_required;
104 OnOffAuto kernel_irqchip_split;
105 bool sync_mmu;
106 uint64_t manual_dirty_log_protect;
107
108
109
110 unsigned irq_set_ioctl;
111 unsigned int sigmask_len;
112 GHashTable *gsimap;
113#ifdef KVM_CAP_IRQ_ROUTING
114 struct kvm_irq_routing *irq_routes;
115 int nr_allocated_irq_routes;
116 unsigned long *used_gsi_bitmap;
117 unsigned int gsi_count;
118 QTAILQ_HEAD(, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE];
119#endif
120 KVMMemoryListener memory_listener;
121 QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus;
122
123
124 void *memcrypt_handle;
125 int (*memcrypt_encrypt_data)(void *handle, uint8_t *ptr, uint64_t len);
126
127
128 int nr_as;
129 struct KVMAs {
130 KVMMemoryListener *ml;
131 AddressSpace *as;
132 } *as;
133};
134
135KVMState *kvm_state;
136bool kvm_kernel_irqchip;
137bool kvm_split_irqchip;
138bool kvm_async_interrupts_allowed;
139bool kvm_halt_in_kernel_allowed;
140bool kvm_eventfds_allowed;
141bool kvm_irqfds_allowed;
142bool kvm_resamplefds_allowed;
143bool kvm_msi_via_irqfd_allowed;
144bool kvm_gsi_routing_allowed;
145bool kvm_gsi_direct_mapping;
146bool kvm_allowed;
147bool kvm_readonly_mem_allowed;
148bool kvm_vm_attributes_allowed;
149bool kvm_direct_msi_allowed;
150bool kvm_ioeventfd_any_length_allowed;
151bool kvm_msi_use_devid;
152static bool kvm_immediate_exit;
153static hwaddr kvm_max_slot_size = ~0;
154
155static const KVMCapabilityInfo kvm_required_capabilites[] = {
156 KVM_CAP_INFO(USER_MEMORY),
157 KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS),
158 KVM_CAP_INFO(JOIN_MEMORY_REGIONS_WORKS),
159 KVM_CAP_LAST_INFO
160};
161
162static NotifierList kvm_irqchip_change_notifiers =
163 NOTIFIER_LIST_INITIALIZER(kvm_irqchip_change_notifiers);
164
165struct KVMResampleFd {
166 int gsi;
167 EventNotifier *resample_event;
168 QLIST_ENTRY(KVMResampleFd) node;
169};
170typedef struct KVMResampleFd KVMResampleFd;
171
172
173
174
175
176static QLIST_HEAD(, KVMResampleFd) kvm_resample_fd_list =
177 QLIST_HEAD_INITIALIZER(kvm_resample_fd_list);
178
179#define kvm_slots_lock(kml) qemu_mutex_lock(&(kml)->slots_lock)
180#define kvm_slots_unlock(kml) qemu_mutex_unlock(&(kml)->slots_lock)
181
182static inline void kvm_resample_fd_remove(int gsi)
183{
184 KVMResampleFd *rfd;
185
186 QLIST_FOREACH(rfd, &kvm_resample_fd_list, node) {
187 if (rfd->gsi == gsi) {
188 QLIST_REMOVE(rfd, node);
189 g_free(rfd);
190 break;
191 }
192 }
193}
194
195static inline void kvm_resample_fd_insert(int gsi, EventNotifier *event)
196{
197 KVMResampleFd *rfd = g_new0(KVMResampleFd, 1);
198
199 rfd->gsi = gsi;
200 rfd->resample_event = event;
201
202 QLIST_INSERT_HEAD(&kvm_resample_fd_list, rfd, node);
203}
204
205void kvm_resample_fd_notify(int gsi)
206{
207 KVMResampleFd *rfd;
208
209 QLIST_FOREACH(rfd, &kvm_resample_fd_list, node) {
210 if (rfd->gsi == gsi) {
211 event_notifier_set(rfd->resample_event);
212 trace_kvm_resample_fd_notify(gsi);
213 return;
214 }
215 }
216}
217
218int kvm_get_max_memslots(void)
219{
220 KVMState *s = KVM_STATE(current_accel());
221
222 return s->nr_slots;
223}
224
225bool kvm_memcrypt_enabled(void)
226{
227 if (kvm_state && kvm_state->memcrypt_handle) {
228 return true;
229 }
230
231 return false;
232}
233
234int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len)
235{
236 if (kvm_state->memcrypt_handle &&
237 kvm_state->memcrypt_encrypt_data) {
238 return kvm_state->memcrypt_encrypt_data(kvm_state->memcrypt_handle,
239 ptr, len);
240 }
241
242 return 1;
243}
244
245
246static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml)
247{
248 KVMState *s = kvm_state;
249 int i;
250
251 for (i = 0; i < s->nr_slots; i++) {
252 if (kml->slots[i].memory_size == 0) {
253 return &kml->slots[i];
254 }
255 }
256
257 return NULL;
258}
259
260bool kvm_has_free_slot(MachineState *ms)
261{
262 KVMState *s = KVM_STATE(ms->accelerator);
263 bool result;
264 KVMMemoryListener *kml = &s->memory_listener;
265
266 kvm_slots_lock(kml);
267 result = !!kvm_get_free_slot(kml);
268 kvm_slots_unlock(kml);
269
270 return result;
271}
272
273
274static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml)
275{
276 KVMSlot *slot = kvm_get_free_slot(kml);
277
278 if (slot) {
279 return slot;
280 }
281
282 fprintf(stderr, "%s: no free slot available\n", __func__);
283 abort();
284}
285
286static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml,
287 hwaddr start_addr,
288 hwaddr size)
289{
290 KVMState *s = kvm_state;
291 int i;
292
293 for (i = 0; i < s->nr_slots; i++) {
294 KVMSlot *mem = &kml->slots[i];
295
296 if (start_addr == mem->start_addr && size == mem->memory_size) {
297 return mem;
298 }
299 }
300
301 return NULL;
302}
303
304
305
306
307
308static hwaddr kvm_align_section(MemoryRegionSection *section,
309 hwaddr *start)
310{
311 hwaddr size = int128_get64(section->size);
312 hwaddr delta, aligned;
313
314
315
316
317 aligned = ROUND_UP(section->offset_within_address_space,
318 qemu_real_host_page_size);
319 delta = aligned - section->offset_within_address_space;
320 *start = aligned;
321 if (delta > size) {
322 return 0;
323 }
324
325 return (size - delta) & qemu_real_host_page_mask;
326}
327
328int kvm_physical_memory_addr_from_host(KVMState *s, void *ram,
329 hwaddr *phys_addr)
330{
331 KVMMemoryListener *kml = &s->memory_listener;
332 int i, ret = 0;
333
334 kvm_slots_lock(kml);
335 for (i = 0; i < s->nr_slots; i++) {
336 KVMSlot *mem = &kml->slots[i];
337
338 if (ram >= mem->ram && ram < mem->ram + mem->memory_size) {
339 *phys_addr = mem->start_addr + (ram - mem->ram);
340 ret = 1;
341 break;
342 }
343 }
344 kvm_slots_unlock(kml);
345
346 return ret;
347}
348
349static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot, bool new)
350{
351 KVMState *s = kvm_state;
352 struct kvm_userspace_memory_region mem;
353 int ret;
354
355 mem.slot = slot->slot | (kml->as_id << 16);
356 mem.guest_phys_addr = slot->start_addr;
357 mem.userspace_addr = (unsigned long)slot->ram;
358 mem.flags = slot->flags;
359
360 if (slot->memory_size && !new && (mem.flags ^ slot->old_flags) & KVM_MEM_READONLY) {
361
362
363 mem.memory_size = 0;
364 ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
365 if (ret < 0) {
366 goto err;
367 }
368 }
369 mem.memory_size = slot->memory_size;
370 ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
371 slot->old_flags = mem.flags;
372err:
373 trace_kvm_set_user_memory(mem.slot, mem.flags, mem.guest_phys_addr,
374 mem.memory_size, mem.userspace_addr, ret);
375 if (ret < 0) {
376 error_report("%s: KVM_SET_USER_MEMORY_REGION failed, slot=%d,"
377 " start=0x%" PRIx64 ", size=0x%" PRIx64 ": %s",
378 __func__, mem.slot, slot->start_addr,
379 (uint64_t)mem.memory_size, strerror(errno));
380 }
381 return ret;
382}
383
384static int do_kvm_destroy_vcpu(CPUState *cpu)
385{
386 KVMState *s = kvm_state;
387 long mmap_size;
388 struct KVMParkedVcpu *vcpu = NULL;
389 int ret = 0;
390
391 DPRINTF("kvm_destroy_vcpu\n");
392
393 ret = kvm_arch_destroy_vcpu(cpu);
394 if (ret < 0) {
395 goto err;
396 }
397
398 mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
399 if (mmap_size < 0) {
400 ret = mmap_size;
401 DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
402 goto err;
403 }
404
405 ret = munmap(cpu->kvm_run, mmap_size);
406 if (ret < 0) {
407 goto err;
408 }
409
410 vcpu = g_malloc0(sizeof(*vcpu));
411 vcpu->vcpu_id = kvm_arch_vcpu_id(cpu);
412 vcpu->kvm_fd = cpu->kvm_fd;
413 QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node);
414err:
415 return ret;
416}
417
418void kvm_destroy_vcpu(CPUState *cpu)
419{
420 if (do_kvm_destroy_vcpu(cpu) < 0) {
421 error_report("kvm_destroy_vcpu failed");
422 exit(EXIT_FAILURE);
423 }
424}
425
426static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id)
427{
428 struct KVMParkedVcpu *cpu;
429
430 QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) {
431 if (cpu->vcpu_id == vcpu_id) {
432 int kvm_fd;
433
434 QLIST_REMOVE(cpu, node);
435 kvm_fd = cpu->kvm_fd;
436 g_free(cpu);
437 return kvm_fd;
438 }
439 }
440
441 return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id);
442}
443
444int kvm_init_vcpu(CPUState *cpu, Error **errp)
445{
446 KVMState *s = kvm_state;
447 long mmap_size;
448 int ret;
449
450 trace_kvm_init_vcpu(cpu->cpu_index, kvm_arch_vcpu_id(cpu));
451
452 ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu));
453 if (ret < 0) {
454 error_setg_errno(errp, -ret, "kvm_init_vcpu: kvm_get_vcpu failed (%lu)",
455 kvm_arch_vcpu_id(cpu));
456 goto err;
457 }
458
459 cpu->kvm_fd = ret;
460 cpu->kvm_state = s;
461 cpu->vcpu_dirty = true;
462
463 mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
464 if (mmap_size < 0) {
465 ret = mmap_size;
466 error_setg_errno(errp, -mmap_size,
467 "kvm_init_vcpu: KVM_GET_VCPU_MMAP_SIZE failed");
468 goto err;
469 }
470
471 cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
472 cpu->kvm_fd, 0);
473 if (cpu->kvm_run == MAP_FAILED) {
474 ret = -errno;
475 error_setg_errno(errp, ret,
476 "kvm_init_vcpu: mmap'ing vcpu state failed (%lu)",
477 kvm_arch_vcpu_id(cpu));
478 goto err;
479 }
480
481 if (s->coalesced_mmio && !s->coalesced_mmio_ring) {
482 s->coalesced_mmio_ring =
483 (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE;
484 }
485
486 ret = kvm_arch_init_vcpu(cpu);
487 if (ret < 0) {
488 error_setg_errno(errp, -ret,
489 "kvm_init_vcpu: kvm_arch_init_vcpu failed (%lu)",
490 kvm_arch_vcpu_id(cpu));
491 }
492err:
493 return ret;
494}
495
496
497
498
499
500static int kvm_mem_flags(MemoryRegion *mr)
501{
502 bool readonly = mr->readonly || memory_region_is_romd(mr);
503 int flags = 0;
504
505 if (memory_region_get_dirty_log_mask(mr) != 0) {
506 flags |= KVM_MEM_LOG_DIRTY_PAGES;
507 }
508 if (readonly && kvm_readonly_mem_allowed) {
509 flags |= KVM_MEM_READONLY;
510 }
511 return flags;
512}
513
514
515static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem,
516 MemoryRegion *mr)
517{
518 mem->flags = kvm_mem_flags(mr);
519
520
521 if (mem->flags == mem->old_flags) {
522 return 0;
523 }
524
525 return kvm_set_user_memory_region(kml, mem, false);
526}
527
528static int kvm_section_update_flags(KVMMemoryListener *kml,
529 MemoryRegionSection *section)
530{
531 hwaddr start_addr, size, slot_size;
532 KVMSlot *mem;
533 int ret = 0;
534
535 size = kvm_align_section(section, &start_addr);
536 if (!size) {
537 return 0;
538 }
539
540 kvm_slots_lock(kml);
541
542 while (size && !ret) {
543 slot_size = MIN(kvm_max_slot_size, size);
544 mem = kvm_lookup_matching_slot(kml, start_addr, slot_size);
545 if (!mem) {
546
547 goto out;
548 }
549
550 ret = kvm_slot_update_flags(kml, mem, section->mr);
551 start_addr += slot_size;
552 size -= slot_size;
553 }
554
555out:
556 kvm_slots_unlock(kml);
557 return ret;
558}
559
560static void kvm_log_start(MemoryListener *listener,
561 MemoryRegionSection *section,
562 int old, int new)
563{
564 KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
565 int r;
566
567 if (old != 0) {
568 return;
569 }
570
571 r = kvm_section_update_flags(kml, section);
572 if (r < 0) {
573 abort();
574 }
575}
576
577static void kvm_log_stop(MemoryListener *listener,
578 MemoryRegionSection *section,
579 int old, int new)
580{
581 KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
582 int r;
583
584 if (new != 0) {
585 return;
586 }
587
588 r = kvm_section_update_flags(kml, section);
589 if (r < 0) {
590 abort();
591 }
592}
593
594
595static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section,
596 unsigned long *bitmap)
597{
598 ram_addr_t start = section->offset_within_region +
599 memory_region_get_ram_addr(section->mr);
600 ram_addr_t pages = int128_get64(section->size) / qemu_real_host_page_size;
601
602 cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages);
603 return 0;
604}
605
606#define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1))
607
608
609static void kvm_memslot_init_dirty_bitmap(KVMSlot *mem)
610{
611
612
613
614
615
616
617
618
619
620
621
622
623
624 hwaddr bitmap_size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS),
625 64) / 8;
626 mem->dirty_bmap = g_malloc0(bitmap_size);
627}
628
629
630
631
632
633
634
635
636
637
638
639
640static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml,
641 MemoryRegionSection *section)
642{
643 KVMState *s = kvm_state;
644 struct kvm_dirty_log d = {};
645 KVMSlot *mem;
646 hwaddr start_addr, size;
647 hwaddr slot_size, slot_offset = 0;
648 int ret = 0;
649
650 size = kvm_align_section(section, &start_addr);
651 while (size) {
652 MemoryRegionSection subsection = *section;
653
654 slot_size = MIN(kvm_max_slot_size, size);
655 mem = kvm_lookup_matching_slot(kml, start_addr, slot_size);
656 if (!mem) {
657
658 goto out;
659 }
660
661 if (!mem->dirty_bmap) {
662
663 kvm_memslot_init_dirty_bitmap(mem);
664 }
665
666 d.dirty_bitmap = mem->dirty_bmap;
667 d.slot = mem->slot | (kml->as_id << 16);
668 if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) {
669 DPRINTF("ioctl failed %d\n", errno);
670 ret = -1;
671 goto out;
672 }
673
674 subsection.offset_within_region += slot_offset;
675 subsection.size = int128_make64(slot_size);
676 kvm_get_dirty_pages_log_range(&subsection, d.dirty_bitmap);
677
678 slot_offset += slot_size;
679 start_addr += slot_size;
680 size -= slot_size;
681 }
682out:
683 return ret;
684}
685
686
687#define KVM_CLEAR_LOG_SHIFT 6
688#define KVM_CLEAR_LOG_ALIGN (qemu_real_host_page_size << KVM_CLEAR_LOG_SHIFT)
689#define KVM_CLEAR_LOG_MASK (-KVM_CLEAR_LOG_ALIGN)
690
691static int kvm_log_clear_one_slot(KVMSlot *mem, int as_id, uint64_t start,
692 uint64_t size)
693{
694 KVMState *s = kvm_state;
695 uint64_t end, bmap_start, start_delta, bmap_npages;
696 struct kvm_clear_dirty_log d;
697 unsigned long *bmap_clear = NULL, psize = qemu_real_host_page_size;
698 int ret;
699
700
701
702
703
704
705 bmap_start = start & KVM_CLEAR_LOG_MASK;
706 start_delta = start - bmap_start;
707 bmap_start /= psize;
708
709
710
711
712
713
714
715 bmap_npages = DIV_ROUND_UP(size + start_delta, KVM_CLEAR_LOG_ALIGN)
716 << KVM_CLEAR_LOG_SHIFT;
717 end = mem->memory_size / psize;
718 if (bmap_npages > end - bmap_start) {
719 bmap_npages = end - bmap_start;
720 }
721 start_delta /= psize;
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745 assert(bmap_start % BITS_PER_LONG == 0);
746
747 assert(mem->dirty_bmap);
748 if (start_delta) {
749
750 bmap_clear = bitmap_new(bmap_npages);
751 bitmap_copy_with_src_offset(bmap_clear, mem->dirty_bmap,
752 bmap_start, start_delta + size / psize);
753
754
755
756
757
758 bitmap_clear(bmap_clear, 0, start_delta);
759 d.dirty_bitmap = bmap_clear;
760 } else {
761
762 d.dirty_bitmap = mem->dirty_bmap + BIT_WORD(bmap_start);
763 }
764
765 d.first_page = bmap_start;
766
767 assert(bmap_npages <= UINT32_MAX);
768 d.num_pages = bmap_npages;
769 d.slot = mem->slot | (as_id << 16);
770
771 if (kvm_vm_ioctl(s, KVM_CLEAR_DIRTY_LOG, &d) == -1) {
772 ret = -errno;
773 error_report("%s: KVM_CLEAR_DIRTY_LOG failed, slot=%d, "
774 "start=0x%"PRIx64", size=0x%"PRIx32", errno=%d",
775 __func__, d.slot, (uint64_t)d.first_page,
776 (uint32_t)d.num_pages, ret);
777 } else {
778 ret = 0;
779 trace_kvm_clear_dirty_log(d.slot, d.first_page, d.num_pages);
780 }
781
782
783
784
785
786
787
788 bitmap_clear(mem->dirty_bmap, bmap_start + start_delta,
789 size / psize);
790
791 g_free(bmap_clear);
792 return ret;
793}
794
795
796
797
798
799
800
801
802
803
804
805
806static int kvm_physical_log_clear(KVMMemoryListener *kml,
807 MemoryRegionSection *section)
808{
809 KVMState *s = kvm_state;
810 uint64_t start, size, offset, count;
811 KVMSlot *mem;
812 int ret = 0, i;
813
814 if (!s->manual_dirty_log_protect) {
815
816 return ret;
817 }
818
819 start = section->offset_within_address_space;
820 size = int128_get64(section->size);
821
822 if (!size) {
823
824 return ret;
825 }
826
827 kvm_slots_lock(kml);
828
829 for (i = 0; i < s->nr_slots; i++) {
830 mem = &kml->slots[i];
831
832 if (!mem->memory_size ||
833 mem->start_addr > start + size - 1 ||
834 start > mem->start_addr + mem->memory_size - 1) {
835 continue;
836 }
837
838 if (start >= mem->start_addr) {
839
840 offset = start - mem->start_addr;
841 count = MIN(mem->memory_size - offset, size);
842 } else {
843
844 offset = 0;
845 count = MIN(mem->memory_size, size - (mem->start_addr - start));
846 }
847 ret = kvm_log_clear_one_slot(mem, kml->as_id, offset, count);
848 if (ret < 0) {
849 break;
850 }
851 }
852
853 kvm_slots_unlock(kml);
854
855 return ret;
856}
857
858static void kvm_coalesce_mmio_region(MemoryListener *listener,
859 MemoryRegionSection *secion,
860 hwaddr start, hwaddr size)
861{
862 KVMState *s = kvm_state;
863
864 if (s->coalesced_mmio) {
865 struct kvm_coalesced_mmio_zone zone;
866
867 zone.addr = start;
868 zone.size = size;
869 zone.pad = 0;
870
871 (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
872 }
873}
874
875static void kvm_uncoalesce_mmio_region(MemoryListener *listener,
876 MemoryRegionSection *secion,
877 hwaddr start, hwaddr size)
878{
879 KVMState *s = kvm_state;
880
881 if (s->coalesced_mmio) {
882 struct kvm_coalesced_mmio_zone zone;
883
884 zone.addr = start;
885 zone.size = size;
886 zone.pad = 0;
887
888 (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
889 }
890}
891
892static void kvm_coalesce_pio_add(MemoryListener *listener,
893 MemoryRegionSection *section,
894 hwaddr start, hwaddr size)
895{
896 KVMState *s = kvm_state;
897
898 if (s->coalesced_pio) {
899 struct kvm_coalesced_mmio_zone zone;
900
901 zone.addr = start;
902 zone.size = size;
903 zone.pio = 1;
904
905 (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
906 }
907}
908
909static void kvm_coalesce_pio_del(MemoryListener *listener,
910 MemoryRegionSection *section,
911 hwaddr start, hwaddr size)
912{
913 KVMState *s = kvm_state;
914
915 if (s->coalesced_pio) {
916 struct kvm_coalesced_mmio_zone zone;
917
918 zone.addr = start;
919 zone.size = size;
920 zone.pio = 1;
921
922 (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
923 }
924}
925
926static MemoryListener kvm_coalesced_pio_listener = {
927 .coalesced_io_add = kvm_coalesce_pio_add,
928 .coalesced_io_del = kvm_coalesce_pio_del,
929};
930
931int kvm_check_extension(KVMState *s, unsigned int extension)
932{
933 int ret;
934
935 ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension);
936 if (ret < 0) {
937 ret = 0;
938 }
939
940 return ret;
941}
942
943int kvm_vm_check_extension(KVMState *s, unsigned int extension)
944{
945 int ret;
946
947 ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension);
948 if (ret < 0) {
949
950 ret = kvm_check_extension(s, extension);
951 }
952
953 return ret;
954}
955
956typedef struct HWPoisonPage {
957 ram_addr_t ram_addr;
958 QLIST_ENTRY(HWPoisonPage) list;
959} HWPoisonPage;
960
961static QLIST_HEAD(, HWPoisonPage) hwpoison_page_list =
962 QLIST_HEAD_INITIALIZER(hwpoison_page_list);
963
964static void kvm_unpoison_all(void *param)
965{
966 HWPoisonPage *page, *next_page;
967
968 QLIST_FOREACH_SAFE(page, &hwpoison_page_list, list, next_page) {
969 QLIST_REMOVE(page, list);
970 qemu_ram_remap(page->ram_addr, TARGET_PAGE_SIZE);
971 g_free(page);
972 }
973}
974
975void kvm_hwpoison_page_add(ram_addr_t ram_addr)
976{
977 HWPoisonPage *page;
978
979 QLIST_FOREACH(page, &hwpoison_page_list, list) {
980 if (page->ram_addr == ram_addr) {
981 return;
982 }
983 }
984 page = g_new(HWPoisonPage, 1);
985 page->ram_addr = ram_addr;
986 QLIST_INSERT_HEAD(&hwpoison_page_list, page, list);
987}
988
989static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size)
990{
991#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
992
993
994
995
996
997 switch (size) {
998 case 2:
999 val = bswap16(val);
1000 break;
1001 case 4:
1002 val = bswap32(val);
1003 break;
1004 }
1005#endif
1006 return val;
1007}
1008
1009static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val,
1010 bool assign, uint32_t size, bool datamatch)
1011{
1012 int ret;
1013 struct kvm_ioeventfd iofd = {
1014 .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0,
1015 .addr = addr,
1016 .len = size,
1017 .flags = 0,
1018 .fd = fd,
1019 };
1020
1021 trace_kvm_set_ioeventfd_mmio(fd, (uint64_t)addr, val, assign, size,
1022 datamatch);
1023 if (!kvm_enabled()) {
1024 return -ENOSYS;
1025 }
1026
1027 if (datamatch) {
1028 iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH;
1029 }
1030 if (!assign) {
1031 iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
1032 }
1033
1034 ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd);
1035
1036 if (ret < 0) {
1037 return -errno;
1038 }
1039
1040 return 0;
1041}
1042
1043static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val,
1044 bool assign, uint32_t size, bool datamatch)
1045{
1046 struct kvm_ioeventfd kick = {
1047 .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0,
1048 .addr = addr,
1049 .flags = KVM_IOEVENTFD_FLAG_PIO,
1050 .len = size,
1051 .fd = fd,
1052 };
1053 int r;
1054 trace_kvm_set_ioeventfd_pio(fd, addr, val, assign, size, datamatch);
1055 if (!kvm_enabled()) {
1056 return -ENOSYS;
1057 }
1058 if (datamatch) {
1059 kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH;
1060 }
1061 if (!assign) {
1062 kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
1063 }
1064 r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
1065 if (r < 0) {
1066 return r;
1067 }
1068 return 0;
1069}
1070
1071
1072static int kvm_check_many_ioeventfds(void)
1073{
1074
1075
1076
1077
1078
1079
1080
1081#if defined(CONFIG_EVENTFD)
1082 int ioeventfds[7];
1083 int i, ret = 0;
1084 for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) {
1085 ioeventfds[i] = eventfd(0, EFD_CLOEXEC);
1086 if (ioeventfds[i] < 0) {
1087 break;
1088 }
1089 ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true);
1090 if (ret < 0) {
1091 close(ioeventfds[i]);
1092 break;
1093 }
1094 }
1095
1096
1097 ret = i == ARRAY_SIZE(ioeventfds);
1098
1099 while (i-- > 0) {
1100 kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true);
1101 close(ioeventfds[i]);
1102 }
1103 return ret;
1104#else
1105 return 0;
1106#endif
1107}
1108
1109static const KVMCapabilityInfo *
1110kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list)
1111{
1112 while (list->name) {
1113 if (!kvm_check_extension(s, list->value)) {
1114 return list;
1115 }
1116 list++;
1117 }
1118 return NULL;
1119}
1120
1121void kvm_set_max_memslot_size(hwaddr max_slot_size)
1122{
1123 g_assert(
1124 ROUND_UP(max_slot_size, qemu_real_host_page_size) == max_slot_size
1125 );
1126 kvm_max_slot_size = max_slot_size;
1127}
1128
1129static void kvm_set_phys_mem(KVMMemoryListener *kml,
1130 MemoryRegionSection *section, bool add)
1131{
1132 KVMSlot *mem;
1133 int err;
1134 MemoryRegion *mr = section->mr;
1135 bool writeable = !mr->readonly && !mr->rom_device;
1136 hwaddr start_addr, size, slot_size;
1137 void *ram;
1138
1139 if (!memory_region_is_ram(mr)) {
1140 if (writeable || !kvm_readonly_mem_allowed) {
1141 return;
1142 } else if (!mr->romd_mode) {
1143
1144
1145 add = false;
1146 }
1147 }
1148
1149 size = kvm_align_section(section, &start_addr);
1150 if (!size) {
1151 return;
1152 }
1153
1154
1155 ram = memory_region_get_ram_ptr(mr) + section->offset_within_region +
1156 (start_addr - section->offset_within_address_space);
1157
1158 kvm_slots_lock(kml);
1159
1160 if (!add) {
1161 do {
1162 slot_size = MIN(kvm_max_slot_size, size);
1163 mem = kvm_lookup_matching_slot(kml, start_addr, slot_size);
1164 if (!mem) {
1165 goto out;
1166 }
1167 if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) {
1168 kvm_physical_sync_dirty_bitmap(kml, section);
1169 }
1170
1171
1172 g_free(mem->dirty_bmap);
1173 mem->dirty_bmap = NULL;
1174 mem->memory_size = 0;
1175 mem->flags = 0;
1176 err = kvm_set_user_memory_region(kml, mem, false);
1177 if (err) {
1178 fprintf(stderr, "%s: error unregistering slot: %s\n",
1179 __func__, strerror(-err));
1180 abort();
1181 }
1182 start_addr += slot_size;
1183 size -= slot_size;
1184 } while (size);
1185 goto out;
1186 }
1187
1188
1189 do {
1190 slot_size = MIN(kvm_max_slot_size, size);
1191 mem = kvm_alloc_slot(kml);
1192 mem->memory_size = slot_size;
1193 mem->start_addr = start_addr;
1194 mem->ram = ram;
1195 mem->flags = kvm_mem_flags(mr);
1196
1197 if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) {
1198
1199
1200
1201
1202 kvm_memslot_init_dirty_bitmap(mem);
1203 }
1204 err = kvm_set_user_memory_region(kml, mem, true);
1205 if (err) {
1206 fprintf(stderr, "%s: error registering slot: %s\n", __func__,
1207 strerror(-err));
1208 abort();
1209 }
1210 start_addr += slot_size;
1211 ram += slot_size;
1212 size -= slot_size;
1213 } while (size);
1214
1215out:
1216 kvm_slots_unlock(kml);
1217}
1218
1219static void kvm_region_add(MemoryListener *listener,
1220 MemoryRegionSection *section)
1221{
1222 KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
1223
1224 memory_region_ref(section->mr);
1225 kvm_set_phys_mem(kml, section, true);
1226}
1227
1228static void kvm_region_del(MemoryListener *listener,
1229 MemoryRegionSection *section)
1230{
1231 KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
1232
1233 kvm_set_phys_mem(kml, section, false);
1234 memory_region_unref(section->mr);
1235}
1236
1237static void kvm_log_sync(MemoryListener *listener,
1238 MemoryRegionSection *section)
1239{
1240 KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
1241 int r;
1242
1243 kvm_slots_lock(kml);
1244 r = kvm_physical_sync_dirty_bitmap(kml, section);
1245 kvm_slots_unlock(kml);
1246 if (r < 0) {
1247 abort();
1248 }
1249}
1250
1251static void kvm_log_clear(MemoryListener *listener,
1252 MemoryRegionSection *section)
1253{
1254 KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
1255 int r;
1256
1257 r = kvm_physical_log_clear(kml, section);
1258 if (r < 0) {
1259 error_report_once("%s: kvm log clear failed: mr=%s "
1260 "offset=%"HWADDR_PRIx" size=%"PRIx64, __func__,
1261 section->mr->name, section->offset_within_region,
1262 int128_get64(section->size));
1263 abort();
1264 }
1265}
1266
1267static void kvm_mem_ioeventfd_add(MemoryListener *listener,
1268 MemoryRegionSection *section,
1269 bool match_data, uint64_t data,
1270 EventNotifier *e)
1271{
1272 int fd = event_notifier_get_fd(e);
1273 int r;
1274
1275 r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space,
1276 data, true, int128_get64(section->size),
1277 match_data);
1278 if (r < 0) {
1279 fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n",
1280 __func__, strerror(-r), -r);
1281 abort();
1282 }
1283}
1284
1285static void kvm_mem_ioeventfd_del(MemoryListener *listener,
1286 MemoryRegionSection *section,
1287 bool match_data, uint64_t data,
1288 EventNotifier *e)
1289{
1290 int fd = event_notifier_get_fd(e);
1291 int r;
1292
1293 r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space,
1294 data, false, int128_get64(section->size),
1295 match_data);
1296 if (r < 0) {
1297 fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n",
1298 __func__, strerror(-r), -r);
1299 abort();
1300 }
1301}
1302
1303static void kvm_io_ioeventfd_add(MemoryListener *listener,
1304 MemoryRegionSection *section,
1305 bool match_data, uint64_t data,
1306 EventNotifier *e)
1307{
1308 int fd = event_notifier_get_fd(e);
1309 int r;
1310
1311 r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space,
1312 data, true, int128_get64(section->size),
1313 match_data);
1314 if (r < 0) {
1315 fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n",
1316 __func__, strerror(-r), -r);
1317 abort();
1318 }
1319}
1320
1321static void kvm_io_ioeventfd_del(MemoryListener *listener,
1322 MemoryRegionSection *section,
1323 bool match_data, uint64_t data,
1324 EventNotifier *e)
1325
1326{
1327 int fd = event_notifier_get_fd(e);
1328 int r;
1329
1330 r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space,
1331 data, false, int128_get64(section->size),
1332 match_data);
1333 if (r < 0) {
1334 fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n",
1335 __func__, strerror(-r), -r);
1336 abort();
1337 }
1338}
1339
1340void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
1341 AddressSpace *as, int as_id)
1342{
1343 int i;
1344
1345 qemu_mutex_init(&kml->slots_lock);
1346 kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot));
1347 kml->as_id = as_id;
1348
1349 for (i = 0; i < s->nr_slots; i++) {
1350 kml->slots[i].slot = i;
1351 }
1352
1353 kml->listener.region_add = kvm_region_add;
1354 kml->listener.region_del = kvm_region_del;
1355 kml->listener.log_start = kvm_log_start;
1356 kml->listener.log_stop = kvm_log_stop;
1357 kml->listener.log_sync = kvm_log_sync;
1358 kml->listener.log_clear = kvm_log_clear;
1359 kml->listener.priority = 10;
1360
1361 memory_listener_register(&kml->listener, as);
1362
1363 for (i = 0; i < s->nr_as; ++i) {
1364 if (!s->as[i].as) {
1365 s->as[i].as = as;
1366 s->as[i].ml = kml;
1367 break;
1368 }
1369 }
1370}
1371
1372static MemoryListener kvm_io_listener = {
1373 .eventfd_add = kvm_io_ioeventfd_add,
1374 .eventfd_del = kvm_io_ioeventfd_del,
1375 .priority = 10,
1376};
1377
1378int kvm_set_irq(KVMState *s, int irq, int level)
1379{
1380 struct kvm_irq_level event;
1381 int ret;
1382
1383 assert(kvm_async_interrupts_enabled());
1384
1385 event.level = level;
1386 event.irq = irq;
1387 ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event);
1388 if (ret < 0) {
1389 perror("kvm_set_irq");
1390 abort();
1391 }
1392
1393 return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status;
1394}
1395
1396#ifdef KVM_CAP_IRQ_ROUTING
1397typedef struct KVMMSIRoute {
1398 struct kvm_irq_routing_entry kroute;
1399 QTAILQ_ENTRY(KVMMSIRoute) entry;
1400} KVMMSIRoute;
1401
1402static void set_gsi(KVMState *s, unsigned int gsi)
1403{
1404 set_bit(gsi, s->used_gsi_bitmap);
1405}
1406
1407static void clear_gsi(KVMState *s, unsigned int gsi)
1408{
1409 clear_bit(gsi, s->used_gsi_bitmap);
1410}
1411
1412void kvm_init_irq_routing(KVMState *s)
1413{
1414 int gsi_count, i;
1415
1416 gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1;
1417 if (gsi_count > 0) {
1418
1419 s->used_gsi_bitmap = bitmap_new(gsi_count);
1420 s->gsi_count = gsi_count;
1421 }
1422
1423 s->irq_routes = g_malloc0(sizeof(*s->irq_routes));
1424 s->nr_allocated_irq_routes = 0;
1425
1426 if (!kvm_direct_msi_allowed) {
1427 for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) {
1428 QTAILQ_INIT(&s->msi_hashtab[i]);
1429 }
1430 }
1431
1432 kvm_arch_init_irq_routing(s);
1433}
1434
1435void kvm_irqchip_commit_routes(KVMState *s)
1436{
1437 int ret;
1438
1439 if (kvm_gsi_direct_mapping()) {
1440 return;
1441 }
1442
1443 if (!kvm_gsi_routing_enabled()) {
1444 return;
1445 }
1446
1447 s->irq_routes->flags = 0;
1448 trace_kvm_irqchip_commit_routes();
1449 ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes);
1450 assert(ret == 0);
1451}
1452
1453static void kvm_add_routing_entry(KVMState *s,
1454 struct kvm_irq_routing_entry *entry)
1455{
1456 struct kvm_irq_routing_entry *new;
1457 int n, size;
1458
1459 if (s->irq_routes->nr == s->nr_allocated_irq_routes) {
1460 n = s->nr_allocated_irq_routes * 2;
1461 if (n < 64) {
1462 n = 64;
1463 }
1464 size = sizeof(struct kvm_irq_routing);
1465 size += n * sizeof(*new);
1466 s->irq_routes = g_realloc(s->irq_routes, size);
1467 s->nr_allocated_irq_routes = n;
1468 }
1469 n = s->irq_routes->nr++;
1470 new = &s->irq_routes->entries[n];
1471
1472 *new = *entry;
1473
1474 set_gsi(s, entry->gsi);
1475}
1476
1477static int kvm_update_routing_entry(KVMState *s,
1478 struct kvm_irq_routing_entry *new_entry)
1479{
1480 struct kvm_irq_routing_entry *entry;
1481 int n;
1482
1483 for (n = 0; n < s->irq_routes->nr; n++) {
1484 entry = &s->irq_routes->entries[n];
1485 if (entry->gsi != new_entry->gsi) {
1486 continue;
1487 }
1488
1489 if(!memcmp(entry, new_entry, sizeof *entry)) {
1490 return 0;
1491 }
1492
1493 *entry = *new_entry;
1494
1495 return 0;
1496 }
1497
1498 return -ESRCH;
1499}
1500
1501void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin)
1502{
1503 struct kvm_irq_routing_entry e = {};
1504
1505 assert(pin < s->gsi_count);
1506
1507 e.gsi = irq;
1508 e.type = KVM_IRQ_ROUTING_IRQCHIP;
1509 e.flags = 0;
1510 e.u.irqchip.irqchip = irqchip;
1511 e.u.irqchip.pin = pin;
1512 kvm_add_routing_entry(s, &e);
1513}
1514
1515void kvm_irqchip_release_virq(KVMState *s, int virq)
1516{
1517 struct kvm_irq_routing_entry *e;
1518 int i;
1519
1520 if (kvm_gsi_direct_mapping()) {
1521 return;
1522 }
1523
1524 for (i = 0; i < s->irq_routes->nr; i++) {
1525 e = &s->irq_routes->entries[i];
1526 if (e->gsi == virq) {
1527 s->irq_routes->nr--;
1528 *e = s->irq_routes->entries[s->irq_routes->nr];
1529 }
1530 }
1531 clear_gsi(s, virq);
1532 kvm_arch_release_virq_post(virq);
1533 trace_kvm_irqchip_release_virq(virq);
1534}
1535
1536void kvm_irqchip_add_change_notifier(Notifier *n)
1537{
1538 notifier_list_add(&kvm_irqchip_change_notifiers, n);
1539}
1540
1541void kvm_irqchip_remove_change_notifier(Notifier *n)
1542{
1543 notifier_remove(n);
1544}
1545
1546void kvm_irqchip_change_notify(void)
1547{
1548 notifier_list_notify(&kvm_irqchip_change_notifiers, NULL);
1549}
1550
1551static unsigned int kvm_hash_msi(uint32_t data)
1552{
1553
1554
1555 return data & 0xff;
1556}
1557
1558static void kvm_flush_dynamic_msi_routes(KVMState *s)
1559{
1560 KVMMSIRoute *route, *next;
1561 unsigned int hash;
1562
1563 for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) {
1564 QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) {
1565 kvm_irqchip_release_virq(s, route->kroute.gsi);
1566 QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry);
1567 g_free(route);
1568 }
1569 }
1570}
1571
1572static int kvm_irqchip_get_virq(KVMState *s)
1573{
1574 int next_virq;
1575
1576
1577
1578
1579
1580
1581
1582 if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) {
1583 kvm_flush_dynamic_msi_routes(s);
1584 }
1585
1586
1587 next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count);
1588 if (next_virq >= s->gsi_count) {
1589 return -ENOSPC;
1590 } else {
1591 return next_virq;
1592 }
1593}
1594
1595static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg)
1596{
1597 unsigned int hash = kvm_hash_msi(msg.data);
1598 KVMMSIRoute *route;
1599
1600 QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) {
1601 if (route->kroute.u.msi.address_lo == (uint32_t)msg.address &&
1602 route->kroute.u.msi.address_hi == (msg.address >> 32) &&
1603 route->kroute.u.msi.data == le32_to_cpu(msg.data)) {
1604 return route;
1605 }
1606 }
1607 return NULL;
1608}
1609
1610int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
1611{
1612 struct kvm_msi msi;
1613 KVMMSIRoute *route;
1614
1615 if (kvm_direct_msi_allowed) {
1616 msi.address_lo = (uint32_t)msg.address;
1617 msi.address_hi = msg.address >> 32;
1618 msi.data = le32_to_cpu(msg.data);
1619 msi.flags = 0;
1620 memset(msi.pad, 0, sizeof(msi.pad));
1621
1622 return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi);
1623 }
1624
1625 route = kvm_lookup_msi_route(s, msg);
1626 if (!route) {
1627 int virq;
1628
1629 virq = kvm_irqchip_get_virq(s);
1630 if (virq < 0) {
1631 return virq;
1632 }
1633
1634 route = g_malloc0(sizeof(KVMMSIRoute));
1635 route->kroute.gsi = virq;
1636 route->kroute.type = KVM_IRQ_ROUTING_MSI;
1637 route->kroute.flags = 0;
1638 route->kroute.u.msi.address_lo = (uint32_t)msg.address;
1639 route->kroute.u.msi.address_hi = msg.address >> 32;
1640 route->kroute.u.msi.data = le32_to_cpu(msg.data);
1641
1642 kvm_add_routing_entry(s, &route->kroute);
1643 kvm_irqchip_commit_routes(s);
1644
1645 QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route,
1646 entry);
1647 }
1648
1649 assert(route->kroute.type == KVM_IRQ_ROUTING_MSI);
1650
1651 return kvm_set_irq(s, route->kroute.gsi, 1);
1652}
1653
1654int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
1655{
1656 struct kvm_irq_routing_entry kroute = {};
1657 int virq;
1658 MSIMessage msg = {0, 0};
1659
1660 if (pci_available && dev) {
1661 msg = pci_get_msi_message(dev, vector);
1662 }
1663
1664 if (kvm_gsi_direct_mapping()) {
1665 return kvm_arch_msi_data_to_gsi(msg.data);
1666 }
1667
1668 if (!kvm_gsi_routing_enabled()) {
1669 return -ENOSYS;
1670 }
1671
1672 virq = kvm_irqchip_get_virq(s);
1673 if (virq < 0) {
1674 return virq;
1675 }
1676
1677 kroute.gsi = virq;
1678 kroute.type = KVM_IRQ_ROUTING_MSI;
1679 kroute.flags = 0;
1680 kroute.u.msi.address_lo = (uint32_t)msg.address;
1681 kroute.u.msi.address_hi = msg.address >> 32;
1682 kroute.u.msi.data = le32_to_cpu(msg.data);
1683 if (pci_available && kvm_msi_devid_required()) {
1684 kroute.flags = KVM_MSI_VALID_DEVID;
1685 kroute.u.msi.devid = pci_requester_id(dev);
1686 }
1687 if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) {
1688 kvm_irqchip_release_virq(s, virq);
1689 return -EINVAL;
1690 }
1691
1692 trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A",
1693 vector, virq);
1694
1695 kvm_add_routing_entry(s, &kroute);
1696 kvm_arch_add_msi_route_post(&kroute, vector, dev);
1697 kvm_irqchip_commit_routes(s);
1698
1699 return virq;
1700}
1701
1702int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
1703 PCIDevice *dev)
1704{
1705 struct kvm_irq_routing_entry kroute = {};
1706
1707 if (kvm_gsi_direct_mapping()) {
1708 return 0;
1709 }
1710
1711 if (!kvm_irqchip_in_kernel()) {
1712 return -ENOSYS;
1713 }
1714
1715 kroute.gsi = virq;
1716 kroute.type = KVM_IRQ_ROUTING_MSI;
1717 kroute.flags = 0;
1718 kroute.u.msi.address_lo = (uint32_t)msg.address;
1719 kroute.u.msi.address_hi = msg.address >> 32;
1720 kroute.u.msi.data = le32_to_cpu(msg.data);
1721 if (pci_available && kvm_msi_devid_required()) {
1722 kroute.flags = KVM_MSI_VALID_DEVID;
1723 kroute.u.msi.devid = pci_requester_id(dev);
1724 }
1725 if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) {
1726 return -EINVAL;
1727 }
1728
1729 trace_kvm_irqchip_update_msi_route(virq);
1730
1731 return kvm_update_routing_entry(s, &kroute);
1732}
1733
1734static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event,
1735 EventNotifier *resample, int virq,
1736 bool assign)
1737{
1738 int fd = event_notifier_get_fd(event);
1739 int rfd = resample ? event_notifier_get_fd(resample) : -1;
1740
1741 struct kvm_irqfd irqfd = {
1742 .fd = fd,
1743 .gsi = virq,
1744 .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN,
1745 };
1746
1747 if (rfd != -1) {
1748 assert(assign);
1749 if (kvm_irqchip_is_split()) {
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766 kvm_resample_fd_insert(virq, resample);
1767 } else {
1768 irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE;
1769 irqfd.resamplefd = rfd;
1770 }
1771 } else if (!assign) {
1772 if (kvm_irqchip_is_split()) {
1773 kvm_resample_fd_remove(virq);
1774 }
1775 }
1776
1777 if (!kvm_irqfds_enabled()) {
1778 return -ENOSYS;
1779 }
1780
1781 return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd);
1782}
1783
1784int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
1785{
1786 struct kvm_irq_routing_entry kroute = {};
1787 int virq;
1788
1789 if (!kvm_gsi_routing_enabled()) {
1790 return -ENOSYS;
1791 }
1792
1793 virq = kvm_irqchip_get_virq(s);
1794 if (virq < 0) {
1795 return virq;
1796 }
1797
1798 kroute.gsi = virq;
1799 kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER;
1800 kroute.flags = 0;
1801 kroute.u.adapter.summary_addr = adapter->summary_addr;
1802 kroute.u.adapter.ind_addr = adapter->ind_addr;
1803 kroute.u.adapter.summary_offset = adapter->summary_offset;
1804 kroute.u.adapter.ind_offset = adapter->ind_offset;
1805 kroute.u.adapter.adapter_id = adapter->adapter_id;
1806
1807 kvm_add_routing_entry(s, &kroute);
1808
1809 return virq;
1810}
1811
1812int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint)
1813{
1814 struct kvm_irq_routing_entry kroute = {};
1815 int virq;
1816
1817 if (!kvm_gsi_routing_enabled()) {
1818 return -ENOSYS;
1819 }
1820 if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) {
1821 return -ENOSYS;
1822 }
1823 virq = kvm_irqchip_get_virq(s);
1824 if (virq < 0) {
1825 return virq;
1826 }
1827
1828 kroute.gsi = virq;
1829 kroute.type = KVM_IRQ_ROUTING_HV_SINT;
1830 kroute.flags = 0;
1831 kroute.u.hv_sint.vcpu = vcpu;
1832 kroute.u.hv_sint.sint = sint;
1833
1834 kvm_add_routing_entry(s, &kroute);
1835 kvm_irqchip_commit_routes(s);
1836
1837 return virq;
1838}
1839
1840#else
1841
1842void kvm_init_irq_routing(KVMState *s)
1843{
1844}
1845
1846void kvm_irqchip_release_virq(KVMState *s, int virq)
1847{
1848}
1849
1850int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
1851{
1852 abort();
1853}
1854
1855int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
1856{
1857 return -ENOSYS;
1858}
1859
1860int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
1861{
1862 return -ENOSYS;
1863}
1864
1865int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint)
1866{
1867 return -ENOSYS;
1868}
1869
1870static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event,
1871 EventNotifier *resample, int virq,
1872 bool assign)
1873{
1874 abort();
1875}
1876
1877int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
1878{
1879 return -ENOSYS;
1880}
1881#endif
1882
1883int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
1884 EventNotifier *rn, int virq)
1885{
1886 return kvm_irqchip_assign_irqfd(s, n, rn, virq, true);
1887}
1888
1889int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
1890 int virq)
1891{
1892 return kvm_irqchip_assign_irqfd(s, n, NULL, virq, false);
1893}
1894
1895int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
1896 EventNotifier *rn, qemu_irq irq)
1897{
1898 gpointer key, gsi;
1899 gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi);
1900
1901 if (!found) {
1902 return -ENXIO;
1903 }
1904 return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi));
1905}
1906
1907int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n,
1908 qemu_irq irq)
1909{
1910 gpointer key, gsi;
1911 gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi);
1912
1913 if (!found) {
1914 return -ENXIO;
1915 }
1916 return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi));
1917}
1918
1919void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi)
1920{
1921 g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi));
1922}
1923
1924static void kvm_irqchip_create(KVMState *s)
1925{
1926 int ret;
1927
1928 assert(s->kernel_irqchip_split != ON_OFF_AUTO_AUTO);
1929 if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) {
1930 ;
1931 } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) {
1932 ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0);
1933 if (ret < 0) {
1934 fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret));
1935 exit(1);
1936 }
1937 } else {
1938 return;
1939 }
1940
1941
1942
1943 ret = kvm_arch_irqchip_create(s);
1944 if (ret == 0) {
1945 if (s->kernel_irqchip_split == ON_OFF_AUTO_ON) {
1946 perror("Split IRQ chip mode not supported.");
1947 exit(1);
1948 } else {
1949 ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP);
1950 }
1951 }
1952 if (ret < 0) {
1953 fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret));
1954 exit(1);
1955 }
1956
1957 kvm_kernel_irqchip = true;
1958
1959
1960
1961 kvm_async_interrupts_allowed = true;
1962 kvm_halt_in_kernel_allowed = true;
1963
1964 kvm_init_irq_routing(s);
1965
1966 s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal);
1967}
1968
1969
1970
1971
1972
1973static int kvm_recommended_vcpus(KVMState *s)
1974{
1975 int ret = kvm_vm_check_extension(s, KVM_CAP_NR_VCPUS);
1976 return (ret) ? ret : 4;
1977}
1978
1979static int kvm_max_vcpus(KVMState *s)
1980{
1981 int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS);
1982 return (ret) ? ret : kvm_recommended_vcpus(s);
1983}
1984
1985static int kvm_max_vcpu_id(KVMState *s)
1986{
1987 int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID);
1988 return (ret) ? ret : kvm_max_vcpus(s);
1989}
1990
1991bool kvm_vcpu_id_is_valid(int vcpu_id)
1992{
1993 KVMState *s = KVM_STATE(current_accel());
1994 return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s);
1995}
1996
1997static int kvm_init(MachineState *ms)
1998{
1999 MachineClass *mc = MACHINE_GET_CLASS(ms);
2000 static const char upgrade_note[] =
2001 "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
2002 "(see http://sourceforge.net/projects/kvm).\n";
2003 struct {
2004 const char *name;
2005 int num;
2006 } num_cpus[] = {
2007 { "SMP", ms->smp.cpus },
2008 { "hotpluggable", ms->smp.max_cpus },
2009 { NULL, }
2010 }, *nc = num_cpus;
2011 int soft_vcpus_limit, hard_vcpus_limit;
2012 KVMState *s;
2013 const KVMCapabilityInfo *missing_cap;
2014 int ret;
2015 int type = 0;
2016 const char *kvm_type;
2017 uint64_t dirty_log_manual_caps;
2018
2019 s = KVM_STATE(ms->accelerator);
2020
2021
2022
2023
2024
2025
2026
2027 assert(TARGET_PAGE_SIZE <= qemu_real_host_page_size);
2028
2029 s->sigmask_len = 8;
2030
2031#ifdef KVM_CAP_SET_GUEST_DEBUG
2032 QTAILQ_INIT(&s->kvm_sw_breakpoints);
2033#endif
2034 QLIST_INIT(&s->kvm_parked_vcpus);
2035 s->vmfd = -1;
2036 s->fd = qemu_open_old("/dev/kvm", O_RDWR);
2037 if (s->fd == -1) {
2038 fprintf(stderr, "Could not access KVM kernel module: %m\n");
2039 ret = -errno;
2040 goto err;
2041 }
2042
2043 ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
2044 if (ret < KVM_API_VERSION) {
2045 if (ret >= 0) {
2046 ret = -EINVAL;
2047 }
2048 fprintf(stderr, "kvm version too old\n");
2049 goto err;
2050 }
2051
2052 if (ret > KVM_API_VERSION) {
2053 ret = -EINVAL;
2054 fprintf(stderr, "kvm version not supported\n");
2055 goto err;
2056 }
2057
2058 kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT);
2059 s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS);
2060
2061
2062 if (!s->nr_slots) {
2063 s->nr_slots = 32;
2064 }
2065
2066 s->nr_as = kvm_check_extension(s, KVM_CAP_MULTI_ADDRESS_SPACE);
2067 if (s->nr_as <= 1) {
2068 s->nr_as = 1;
2069 }
2070 s->as = g_new0(struct KVMAs, s->nr_as);
2071
2072 kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type");
2073 if (mc->kvm_type) {
2074 type = mc->kvm_type(ms, kvm_type);
2075 } else if (kvm_type) {
2076 ret = -EINVAL;
2077 fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type);
2078 goto err;
2079 }
2080
2081 do {
2082 ret = kvm_ioctl(s, KVM_CREATE_VM, type);
2083 } while (ret == -EINTR);
2084
2085 if (ret < 0) {
2086 fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret,
2087 strerror(-ret));
2088
2089#ifdef TARGET_S390X
2090 if (ret == -EINVAL) {
2091 fprintf(stderr,
2092 "Host kernel setup problem detected. Please verify:\n");
2093 fprintf(stderr, "- for kernels supporting the switch_amode or"
2094 " user_mode parameters, whether\n");
2095 fprintf(stderr,
2096 " user space is running in primary address space\n");
2097 fprintf(stderr,
2098 "- for kernels supporting the vm.allocate_pgste sysctl, "
2099 "whether it is enabled\n");
2100 }
2101#endif
2102 goto err;
2103 }
2104
2105 s->vmfd = ret;
2106
2107
2108 soft_vcpus_limit = kvm_recommended_vcpus(s);
2109 hard_vcpus_limit = kvm_max_vcpus(s);
2110
2111 while (nc->name) {
2112 if (nc->num > soft_vcpus_limit) {
2113 warn_report("Number of %s cpus requested (%d) exceeds "
2114 "the recommended cpus supported by KVM (%d)",
2115 nc->name, nc->num, soft_vcpus_limit);
2116
2117 if (nc->num > hard_vcpus_limit) {
2118 fprintf(stderr, "Number of %s cpus requested (%d) exceeds "
2119 "the maximum cpus supported by KVM (%d)\n",
2120 nc->name, nc->num, hard_vcpus_limit);
2121 exit(1);
2122 }
2123 }
2124 nc++;
2125 }
2126
2127 missing_cap = kvm_check_extension_list(s, kvm_required_capabilites);
2128 if (!missing_cap) {
2129 missing_cap =
2130 kvm_check_extension_list(s, kvm_arch_required_capabilities);
2131 }
2132 if (missing_cap) {
2133 ret = -EINVAL;
2134 fprintf(stderr, "kvm does not support %s\n%s",
2135 missing_cap->name, upgrade_note);
2136 goto err;
2137 }
2138
2139 s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO);
2140 s->coalesced_pio = s->coalesced_mmio &&
2141 kvm_check_extension(s, KVM_CAP_COALESCED_PIO);
2142
2143 dirty_log_manual_caps =
2144 kvm_check_extension(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2);
2145 dirty_log_manual_caps &= (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE |
2146 KVM_DIRTY_LOG_INITIALLY_SET);
2147 s->manual_dirty_log_protect = dirty_log_manual_caps;
2148 if (dirty_log_manual_caps) {
2149 ret = kvm_vm_enable_cap(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2, 0,
2150 dirty_log_manual_caps);
2151 if (ret) {
2152 warn_report("Trying to enable capability %"PRIu64" of "
2153 "KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 but failed. "
2154 "Falling back to the legacy mode. ",
2155 dirty_log_manual_caps);
2156 s->manual_dirty_log_protect = 0;
2157 }
2158 }
2159
2160#ifdef KVM_CAP_VCPU_EVENTS
2161 s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS);
2162#endif
2163
2164 s->robust_singlestep =
2165 kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP);
2166
2167#ifdef KVM_CAP_DEBUGREGS
2168 s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS);
2169#endif
2170
2171 s->max_nested_state_len = kvm_check_extension(s, KVM_CAP_NESTED_STATE);
2172
2173#ifdef KVM_CAP_IRQ_ROUTING
2174 kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0);
2175#endif
2176
2177 s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3);
2178
2179 s->irq_set_ioctl = KVM_IRQ_LINE;
2180 if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) {
2181 s->irq_set_ioctl = KVM_IRQ_LINE_STATUS;
2182 }
2183
2184 kvm_readonly_mem_allowed =
2185 (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0);
2186
2187 kvm_eventfds_allowed =
2188 (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0);
2189
2190 kvm_irqfds_allowed =
2191 (kvm_check_extension(s, KVM_CAP_IRQFD) > 0);
2192
2193 kvm_resamplefds_allowed =
2194 (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0);
2195
2196 kvm_vm_attributes_allowed =
2197 (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0);
2198
2199 kvm_ioeventfd_any_length_allowed =
2200 (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0);
2201
2202 kvm_state = s;
2203
2204
2205
2206
2207
2208 if (ms->memory_encryption) {
2209 kvm_state->memcrypt_handle = sev_guest_init(ms->memory_encryption);
2210 if (!kvm_state->memcrypt_handle) {
2211 ret = -1;
2212 goto err;
2213 }
2214
2215 kvm_state->memcrypt_encrypt_data = sev_encrypt_data;
2216 }
2217
2218 ret = kvm_arch_init(ms, s);
2219 if (ret < 0) {
2220 goto err;
2221 }
2222
2223 if (s->kernel_irqchip_split == ON_OFF_AUTO_AUTO) {
2224 s->kernel_irqchip_split = mc->default_kernel_irqchip_split ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
2225 }
2226
2227 qemu_register_reset(kvm_unpoison_all, NULL);
2228
2229 if (s->kernel_irqchip_allowed) {
2230 kvm_irqchip_create(s);
2231 }
2232
2233 if (kvm_eventfds_allowed) {
2234 s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add;
2235 s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del;
2236 }
2237 s->memory_listener.listener.coalesced_io_add = kvm_coalesce_mmio_region;
2238 s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region;
2239
2240 kvm_memory_listener_register(s, &s->memory_listener,
2241 &address_space_memory, 0);
2242 if (kvm_eventfds_allowed) {
2243 memory_listener_register(&kvm_io_listener,
2244 &address_space_io);
2245 }
2246 memory_listener_register(&kvm_coalesced_pio_listener,
2247 &address_space_io);
2248
2249 s->many_ioeventfds = kvm_check_many_ioeventfds();
2250
2251 s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
2252 if (!s->sync_mmu) {
2253 ret = ram_block_discard_disable(true);
2254 assert(!ret);
2255 }
2256
2257 cpus_register_accel(&kvm_cpus);
2258 return 0;
2259
2260err:
2261 assert(ret < 0);
2262 if (s->vmfd >= 0) {
2263 close(s->vmfd);
2264 }
2265 if (s->fd != -1) {
2266 close(s->fd);
2267 }
2268 g_free(s->memory_listener.slots);
2269
2270 return ret;
2271}
2272
2273void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len)
2274{
2275 s->sigmask_len = sigmask_len;
2276}
2277
2278static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction,
2279 int size, uint32_t count)
2280{
2281 int i;
2282 uint8_t *ptr = data;
2283
2284 for (i = 0; i < count; i++) {
2285 address_space_rw(&address_space_io, port, attrs,
2286 ptr, size,
2287 direction == KVM_EXIT_IO_OUT);
2288 ptr += size;
2289 }
2290}
2291
2292static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run)
2293{
2294 fprintf(stderr, "KVM internal error. Suberror: %d\n",
2295 run->internal.suberror);
2296
2297 if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
2298 int i;
2299
2300 for (i = 0; i < run->internal.ndata; ++i) {
2301 fprintf(stderr, "extra data[%d]: %"PRIx64"\n",
2302 i, (uint64_t)run->internal.data[i]);
2303 }
2304 }
2305 if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
2306 fprintf(stderr, "emulation failure\n");
2307 if (!kvm_arch_stop_on_emulation_error(cpu)) {
2308 cpu_dump_state(cpu, stderr, CPU_DUMP_CODE);
2309 return EXCP_INTERRUPT;
2310 }
2311 }
2312
2313
2314
2315 return -1;
2316}
2317
2318void kvm_flush_coalesced_mmio_buffer(void)
2319{
2320 KVMState *s = kvm_state;
2321
2322 if (s->coalesced_flush_in_progress) {
2323 return;
2324 }
2325
2326 s->coalesced_flush_in_progress = true;
2327
2328 if (s->coalesced_mmio_ring) {
2329 struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
2330 while (ring->first != ring->last) {
2331 struct kvm_coalesced_mmio *ent;
2332
2333 ent = &ring->coalesced_mmio[ring->first];
2334
2335 if (ent->pio == 1) {
2336 address_space_write(&address_space_io, ent->phys_addr,
2337 MEMTXATTRS_UNSPECIFIED, ent->data,
2338 ent->len);
2339 } else {
2340 cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len);
2341 }
2342 smp_wmb();
2343 ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
2344 }
2345 }
2346
2347 s->coalesced_flush_in_progress = false;
2348}
2349
2350static void do_kvm_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg)
2351{
2352 if (!cpu->vcpu_dirty) {
2353 kvm_arch_get_registers(cpu);
2354 cpu->vcpu_dirty = true;
2355 }
2356}
2357
2358void kvm_cpu_synchronize_state(CPUState *cpu)
2359{
2360 if (!cpu->vcpu_dirty) {
2361 run_on_cpu(cpu, do_kvm_cpu_synchronize_state, RUN_ON_CPU_NULL);
2362 }
2363}
2364
2365static void do_kvm_cpu_synchronize_post_reset(CPUState *cpu, run_on_cpu_data arg)
2366{
2367 kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE);
2368 cpu->vcpu_dirty = false;
2369}
2370
2371void kvm_cpu_synchronize_post_reset(CPUState *cpu)
2372{
2373 run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, RUN_ON_CPU_NULL);
2374}
2375
2376static void do_kvm_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg)
2377{
2378 kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE);
2379 cpu->vcpu_dirty = false;
2380}
2381
2382void kvm_cpu_synchronize_post_init(CPUState *cpu)
2383{
2384 run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, RUN_ON_CPU_NULL);
2385}
2386
2387static void do_kvm_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg)
2388{
2389 cpu->vcpu_dirty = true;
2390}
2391
2392void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu)
2393{
2394 run_on_cpu(cpu, do_kvm_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL);
2395}
2396
2397#ifdef KVM_HAVE_MCE_INJECTION
2398static __thread void *pending_sigbus_addr;
2399static __thread int pending_sigbus_code;
2400static __thread bool have_sigbus_pending;
2401#endif
2402
2403static void kvm_cpu_kick(CPUState *cpu)
2404{
2405 qatomic_set(&cpu->kvm_run->immediate_exit, 1);
2406}
2407
2408static void kvm_cpu_kick_self(void)
2409{
2410 if (kvm_immediate_exit) {
2411 kvm_cpu_kick(current_cpu);
2412 } else {
2413 qemu_cpu_kick_self();
2414 }
2415}
2416
2417static void kvm_eat_signals(CPUState *cpu)
2418{
2419 struct timespec ts = { 0, 0 };
2420 siginfo_t siginfo;
2421 sigset_t waitset;
2422 sigset_t chkset;
2423 int r;
2424
2425 if (kvm_immediate_exit) {
2426 qatomic_set(&cpu->kvm_run->immediate_exit, 0);
2427
2428
2429
2430 smp_wmb();
2431 return;
2432 }
2433
2434 sigemptyset(&waitset);
2435 sigaddset(&waitset, SIG_IPI);
2436
2437 do {
2438 r = sigtimedwait(&waitset, &siginfo, &ts);
2439 if (r == -1 && !(errno == EAGAIN || errno == EINTR)) {
2440 perror("sigtimedwait");
2441 exit(1);
2442 }
2443
2444 r = sigpending(&chkset);
2445 if (r == -1) {
2446 perror("sigpending");
2447 exit(1);
2448 }
2449 } while (sigismember(&chkset, SIG_IPI));
2450}
2451
2452int kvm_cpu_exec(CPUState *cpu)
2453{
2454 struct kvm_run *run = cpu->kvm_run;
2455 int ret, run_ret;
2456
2457 DPRINTF("kvm_cpu_exec()\n");
2458
2459 if (kvm_arch_process_async_events(cpu)) {
2460 qatomic_set(&cpu->exit_request, 0);
2461 return EXCP_HLT;
2462 }
2463
2464 qemu_mutex_unlock_iothread();
2465 cpu_exec_start(cpu);
2466
2467 do {
2468 MemTxAttrs attrs;
2469
2470 if (cpu->vcpu_dirty) {
2471 kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE);
2472 cpu->vcpu_dirty = false;
2473 }
2474
2475 kvm_arch_pre_run(cpu, run);
2476 if (qatomic_read(&cpu->exit_request)) {
2477 DPRINTF("interrupt exit requested\n");
2478
2479
2480
2481
2482
2483 kvm_cpu_kick_self();
2484 }
2485
2486
2487
2488
2489 smp_rmb();
2490
2491 run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0);
2492
2493 attrs = kvm_arch_post_run(cpu, run);
2494
2495#ifdef KVM_HAVE_MCE_INJECTION
2496 if (unlikely(have_sigbus_pending)) {
2497 qemu_mutex_lock_iothread();
2498 kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code,
2499 pending_sigbus_addr);
2500 have_sigbus_pending = false;
2501 qemu_mutex_unlock_iothread();
2502 }
2503#endif
2504
2505 if (run_ret < 0) {
2506 if (run_ret == -EINTR || run_ret == -EAGAIN) {
2507 DPRINTF("io window exit\n");
2508 kvm_eat_signals(cpu);
2509 ret = EXCP_INTERRUPT;
2510 break;
2511 }
2512 fprintf(stderr, "error: kvm run failed %s\n",
2513 strerror(-run_ret));
2514#ifdef TARGET_PPC
2515 if (run_ret == -EBUSY) {
2516 fprintf(stderr,
2517 "This is probably because your SMT is enabled.\n"
2518 "VCPU can only run on primary threads with all "
2519 "secondary threads offline.\n");
2520 }
2521#endif
2522 ret = -1;
2523 break;
2524 }
2525
2526 trace_kvm_run_exit(cpu->cpu_index, run->exit_reason);
2527 switch (run->exit_reason) {
2528 case KVM_EXIT_IO:
2529 DPRINTF("handle_io\n");
2530
2531 kvm_handle_io(run->io.port, attrs,
2532 (uint8_t *)run + run->io.data_offset,
2533 run->io.direction,
2534 run->io.size,
2535 run->io.count);
2536 ret = 0;
2537 break;
2538 case KVM_EXIT_MMIO:
2539 DPRINTF("handle_mmio\n");
2540
2541 address_space_rw(&address_space_memory,
2542 run->mmio.phys_addr, attrs,
2543 run->mmio.data,
2544 run->mmio.len,
2545 run->mmio.is_write);
2546 ret = 0;
2547 break;
2548 case KVM_EXIT_IRQ_WINDOW_OPEN:
2549 DPRINTF("irq_window_open\n");
2550 ret = EXCP_INTERRUPT;
2551 break;
2552 case KVM_EXIT_SHUTDOWN:
2553 DPRINTF("shutdown\n");
2554 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
2555 ret = EXCP_INTERRUPT;
2556 break;
2557 case KVM_EXIT_UNKNOWN:
2558 fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n",
2559 (uint64_t)run->hw.hardware_exit_reason);
2560 ret = -1;
2561 break;
2562 case KVM_EXIT_INTERNAL_ERROR:
2563 ret = kvm_handle_internal_error(cpu, run);
2564 break;
2565 case KVM_EXIT_SYSTEM_EVENT:
2566 switch (run->system_event.type) {
2567 case KVM_SYSTEM_EVENT_SHUTDOWN:
2568 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
2569 ret = EXCP_INTERRUPT;
2570 break;
2571 case KVM_SYSTEM_EVENT_RESET:
2572 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
2573 ret = EXCP_INTERRUPT;
2574 break;
2575 case KVM_SYSTEM_EVENT_CRASH:
2576 kvm_cpu_synchronize_state(cpu);
2577 qemu_mutex_lock_iothread();
2578 qemu_system_guest_panicked(cpu_get_crash_info(cpu));
2579 qemu_mutex_unlock_iothread();
2580 ret = 0;
2581 break;
2582 default:
2583 DPRINTF("kvm_arch_handle_exit\n");
2584 ret = kvm_arch_handle_exit(cpu, run);
2585 break;
2586 }
2587 break;
2588 default:
2589 DPRINTF("kvm_arch_handle_exit\n");
2590 ret = kvm_arch_handle_exit(cpu, run);
2591 break;
2592 }
2593 } while (ret == 0);
2594
2595 cpu_exec_end(cpu);
2596 qemu_mutex_lock_iothread();
2597
2598 if (ret < 0) {
2599 cpu_dump_state(cpu, stderr, CPU_DUMP_CODE);
2600 vm_stop(RUN_STATE_INTERNAL_ERROR);
2601 }
2602
2603 qatomic_set(&cpu->exit_request, 0);
2604 return ret;
2605}
2606
2607int kvm_ioctl(KVMState *s, int type, ...)
2608{
2609 int ret;
2610 void *arg;
2611 va_list ap;
2612
2613 va_start(ap, type);
2614 arg = va_arg(ap, void *);
2615 va_end(ap);
2616
2617 trace_kvm_ioctl(type, arg);
2618 ret = ioctl(s->fd, type, arg);
2619 if (ret == -1) {
2620 ret = -errno;
2621 }
2622 return ret;
2623}
2624
2625int kvm_vm_ioctl(KVMState *s, int type, ...)
2626{
2627 int ret;
2628 void *arg;
2629 va_list ap;
2630
2631 va_start(ap, type);
2632 arg = va_arg(ap, void *);
2633 va_end(ap);
2634
2635 trace_kvm_vm_ioctl(type, arg);
2636 ret = ioctl(s->vmfd, type, arg);
2637 if (ret == -1) {
2638 ret = -errno;
2639 }
2640 return ret;
2641}
2642
2643int kvm_vcpu_ioctl(CPUState *cpu, int type, ...)
2644{
2645 int ret;
2646 void *arg;
2647 va_list ap;
2648
2649 va_start(ap, type);
2650 arg = va_arg(ap, void *);
2651 va_end(ap);
2652
2653 trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg);
2654 ret = ioctl(cpu->kvm_fd, type, arg);
2655 if (ret == -1) {
2656 ret = -errno;
2657 }
2658 return ret;
2659}
2660
2661int kvm_device_ioctl(int fd, int type, ...)
2662{
2663 int ret;
2664 void *arg;
2665 va_list ap;
2666
2667 va_start(ap, type);
2668 arg = va_arg(ap, void *);
2669 va_end(ap);
2670
2671 trace_kvm_device_ioctl(fd, type, arg);
2672 ret = ioctl(fd, type, arg);
2673 if (ret == -1) {
2674 ret = -errno;
2675 }
2676 return ret;
2677}
2678
2679int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr)
2680{
2681 int ret;
2682 struct kvm_device_attr attribute = {
2683 .group = group,
2684 .attr = attr,
2685 };
2686
2687 if (!kvm_vm_attributes_allowed) {
2688 return 0;
2689 }
2690
2691 ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute);
2692
2693 return ret ? 0 : 1;
2694}
2695
2696int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr)
2697{
2698 struct kvm_device_attr attribute = {
2699 .group = group,
2700 .attr = attr,
2701 .flags = 0,
2702 };
2703
2704 return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1;
2705}
2706
2707int kvm_device_access(int fd, int group, uint64_t attr,
2708 void *val, bool write, Error **errp)
2709{
2710 struct kvm_device_attr kvmattr;
2711 int err;
2712
2713 kvmattr.flags = 0;
2714 kvmattr.group = group;
2715 kvmattr.attr = attr;
2716 kvmattr.addr = (uintptr_t)val;
2717
2718 err = kvm_device_ioctl(fd,
2719 write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR,
2720 &kvmattr);
2721 if (err < 0) {
2722 error_setg_errno(errp, -err,
2723 "KVM_%s_DEVICE_ATTR failed: Group %d "
2724 "attr 0x%016" PRIx64,
2725 write ? "SET" : "GET", group, attr);
2726 }
2727 return err;
2728}
2729
2730bool kvm_has_sync_mmu(void)
2731{
2732 return kvm_state->sync_mmu;
2733}
2734
2735int kvm_has_vcpu_events(void)
2736{
2737 return kvm_state->vcpu_events;
2738}
2739
2740int kvm_has_robust_singlestep(void)
2741{
2742 return kvm_state->robust_singlestep;
2743}
2744
2745int kvm_has_debugregs(void)
2746{
2747 return kvm_state->debugregs;
2748}
2749
2750int kvm_max_nested_state_length(void)
2751{
2752 return kvm_state->max_nested_state_len;
2753}
2754
2755int kvm_has_many_ioeventfds(void)
2756{
2757 if (!kvm_enabled()) {
2758 return 0;
2759 }
2760 return kvm_state->many_ioeventfds;
2761}
2762
2763int kvm_has_gsi_routing(void)
2764{
2765#ifdef KVM_CAP_IRQ_ROUTING
2766 return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING);
2767#else
2768 return false;
2769#endif
2770}
2771
2772int kvm_has_intx_set_mask(void)
2773{
2774 return kvm_state->intx_set_mask;
2775}
2776
2777bool kvm_arm_supports_user_irq(void)
2778{
2779 return kvm_check_extension(kvm_state, KVM_CAP_ARM_USER_IRQ);
2780}
2781
2782#ifdef KVM_CAP_SET_GUEST_DEBUG
2783struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
2784 target_ulong pc)
2785{
2786 struct kvm_sw_breakpoint *bp;
2787
2788 QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) {
2789 if (bp->pc == pc) {
2790 return bp;
2791 }
2792 }
2793 return NULL;
2794}
2795
2796int kvm_sw_breakpoints_active(CPUState *cpu)
2797{
2798 return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints);
2799}
2800
2801struct kvm_set_guest_debug_data {
2802 struct kvm_guest_debug dbg;
2803 int err;
2804};
2805
2806static void kvm_invoke_set_guest_debug(CPUState *cpu, run_on_cpu_data data)
2807{
2808 struct kvm_set_guest_debug_data *dbg_data =
2809 (struct kvm_set_guest_debug_data *) data.host_ptr;
2810
2811 dbg_data->err = kvm_vcpu_ioctl(cpu, KVM_SET_GUEST_DEBUG,
2812 &dbg_data->dbg);
2813}
2814
2815int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
2816{
2817 struct kvm_set_guest_debug_data data;
2818
2819 data.dbg.control = reinject_trap;
2820
2821 if (cpu->singlestep_enabled) {
2822 data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP;
2823 }
2824 kvm_arch_update_guest_debug(cpu, &data.dbg);
2825
2826 run_on_cpu(cpu, kvm_invoke_set_guest_debug,
2827 RUN_ON_CPU_HOST_PTR(&data));
2828 return data.err;
2829}
2830
2831int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
2832 target_ulong len, int type)
2833{
2834 struct kvm_sw_breakpoint *bp;
2835 int err;
2836
2837 if (type == GDB_BREAKPOINT_SW) {
2838 bp = kvm_find_sw_breakpoint(cpu, addr);
2839 if (bp) {
2840 bp->use_count++;
2841 return 0;
2842 }
2843
2844 bp = g_malloc(sizeof(struct kvm_sw_breakpoint));
2845 bp->pc = addr;
2846 bp->use_count = 1;
2847 err = kvm_arch_insert_sw_breakpoint(cpu, bp);
2848 if (err) {
2849 g_free(bp);
2850 return err;
2851 }
2852
2853 QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry);
2854 } else {
2855 err = kvm_arch_insert_hw_breakpoint(addr, len, type);
2856 if (err) {
2857 return err;
2858 }
2859 }
2860
2861 CPU_FOREACH(cpu) {
2862 err = kvm_update_guest_debug(cpu, 0);
2863 if (err) {
2864 return err;
2865 }
2866 }
2867 return 0;
2868}
2869
2870int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
2871 target_ulong len, int type)
2872{
2873 struct kvm_sw_breakpoint *bp;
2874 int err;
2875
2876 if (type == GDB_BREAKPOINT_SW) {
2877 bp = kvm_find_sw_breakpoint(cpu, addr);
2878 if (!bp) {
2879 return -ENOENT;
2880 }
2881
2882 if (bp->use_count > 1) {
2883 bp->use_count--;
2884 return 0;
2885 }
2886
2887 err = kvm_arch_remove_sw_breakpoint(cpu, bp);
2888 if (err) {
2889 return err;
2890 }
2891
2892 QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry);
2893 g_free(bp);
2894 } else {
2895 err = kvm_arch_remove_hw_breakpoint(addr, len, type);
2896 if (err) {
2897 return err;
2898 }
2899 }
2900
2901 CPU_FOREACH(cpu) {
2902 err = kvm_update_guest_debug(cpu, 0);
2903 if (err) {
2904 return err;
2905 }
2906 }
2907 return 0;
2908}
2909
2910void kvm_remove_all_breakpoints(CPUState *cpu)
2911{
2912 struct kvm_sw_breakpoint *bp, *next;
2913 KVMState *s = cpu->kvm_state;
2914 CPUState *tmpcpu;
2915
2916 QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) {
2917 if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) {
2918
2919 CPU_FOREACH(tmpcpu) {
2920 if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) {
2921 break;
2922 }
2923 }
2924 }
2925 QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry);
2926 g_free(bp);
2927 }
2928 kvm_arch_remove_all_hw_breakpoints();
2929
2930 CPU_FOREACH(cpu) {
2931 kvm_update_guest_debug(cpu, 0);
2932 }
2933}
2934
2935#else
2936
2937int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
2938{
2939 return -EINVAL;
2940}
2941
2942int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
2943 target_ulong len, int type)
2944{
2945 return -EINVAL;
2946}
2947
2948int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
2949 target_ulong len, int type)
2950{
2951 return -EINVAL;
2952}
2953
2954void kvm_remove_all_breakpoints(CPUState *cpu)
2955{
2956}
2957#endif
2958
2959static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset)
2960{
2961 KVMState *s = kvm_state;
2962 struct kvm_signal_mask *sigmask;
2963 int r;
2964
2965 sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset));
2966
2967 sigmask->len = s->sigmask_len;
2968 memcpy(sigmask->sigset, sigset, sizeof(*sigset));
2969 r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask);
2970 g_free(sigmask);
2971
2972 return r;
2973}
2974
2975static void kvm_ipi_signal(int sig)
2976{
2977 if (current_cpu) {
2978 assert(kvm_immediate_exit);
2979 kvm_cpu_kick(current_cpu);
2980 }
2981}
2982
2983void kvm_init_cpu_signals(CPUState *cpu)
2984{
2985 int r;
2986 sigset_t set;
2987 struct sigaction sigact;
2988
2989 memset(&sigact, 0, sizeof(sigact));
2990 sigact.sa_handler = kvm_ipi_signal;
2991 sigaction(SIG_IPI, &sigact, NULL);
2992
2993 pthread_sigmask(SIG_BLOCK, NULL, &set);
2994#if defined KVM_HAVE_MCE_INJECTION
2995 sigdelset(&set, SIGBUS);
2996 pthread_sigmask(SIG_SETMASK, &set, NULL);
2997#endif
2998 sigdelset(&set, SIG_IPI);
2999 if (kvm_immediate_exit) {
3000 r = pthread_sigmask(SIG_SETMASK, &set, NULL);
3001 } else {
3002 r = kvm_set_signal_mask(cpu, &set);
3003 }
3004 if (r) {
3005 fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
3006 exit(1);
3007 }
3008}
3009
3010
3011int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
3012{
3013#ifdef KVM_HAVE_MCE_INJECTION
3014 if (have_sigbus_pending) {
3015 return 1;
3016 }
3017 have_sigbus_pending = true;
3018 pending_sigbus_addr = addr;
3019 pending_sigbus_code = code;
3020 qatomic_set(&cpu->exit_request, 1);
3021 return 0;
3022#else
3023 return 1;
3024#endif
3025}
3026
3027
3028int kvm_on_sigbus(int code, void *addr)
3029{
3030#ifdef KVM_HAVE_MCE_INJECTION
3031
3032
3033
3034
3035 assert(code != BUS_MCEERR_AR);
3036 kvm_arch_on_sigbus_vcpu(first_cpu, code, addr);
3037 return 0;
3038#else
3039 return 1;
3040#endif
3041}
3042
3043int kvm_create_device(KVMState *s, uint64_t type, bool test)
3044{
3045 int ret;
3046 struct kvm_create_device create_dev;
3047
3048 create_dev.type = type;
3049 create_dev.fd = -1;
3050 create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0;
3051
3052 if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) {
3053 return -ENOTSUP;
3054 }
3055
3056 ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev);
3057 if (ret) {
3058 return ret;
3059 }
3060
3061 return test ? 0 : create_dev.fd;
3062}
3063
3064bool kvm_device_supported(int vmfd, uint64_t type)
3065{
3066 struct kvm_create_device create_dev = {
3067 .type = type,
3068 .fd = -1,
3069 .flags = KVM_CREATE_DEVICE_TEST,
3070 };
3071
3072 if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) {
3073 return false;
3074 }
3075
3076 return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0);
3077}
3078
3079int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source)
3080{
3081 struct kvm_one_reg reg;
3082 int r;
3083
3084 reg.id = id;
3085 reg.addr = (uintptr_t) source;
3086 r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
3087 if (r) {
3088 trace_kvm_failed_reg_set(id, strerror(-r));
3089 }
3090 return r;
3091}
3092
3093int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target)
3094{
3095 struct kvm_one_reg reg;
3096 int r;
3097
3098 reg.id = id;
3099 reg.addr = (uintptr_t) target;
3100 r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
3101 if (r) {
3102 trace_kvm_failed_reg_get(id, strerror(-r));
3103 }
3104 return r;
3105}
3106
3107static bool kvm_accel_has_memory(MachineState *ms, AddressSpace *as,
3108 hwaddr start_addr, hwaddr size)
3109{
3110 KVMState *kvm = KVM_STATE(ms->accelerator);
3111 int i;
3112
3113 for (i = 0; i < kvm->nr_as; ++i) {
3114 if (kvm->as[i].as == as && kvm->as[i].ml) {
3115 size = MIN(kvm_max_slot_size, size);
3116 return NULL != kvm_lookup_matching_slot(kvm->as[i].ml,
3117 start_addr, size);
3118 }
3119 }
3120
3121 return false;
3122}
3123
3124static void kvm_get_kvm_shadow_mem(Object *obj, Visitor *v,
3125 const char *name, void *opaque,
3126 Error **errp)
3127{
3128 KVMState *s = KVM_STATE(obj);
3129 int64_t value = s->kvm_shadow_mem;
3130
3131 visit_type_int(v, name, &value, errp);
3132}
3133
3134static void kvm_set_kvm_shadow_mem(Object *obj, Visitor *v,
3135 const char *name, void *opaque,
3136 Error **errp)
3137{
3138 KVMState *s = KVM_STATE(obj);
3139 int64_t value;
3140
3141 if (!visit_type_int(v, name, &value, errp)) {
3142 return;
3143 }
3144
3145 s->kvm_shadow_mem = value;
3146}
3147
3148static void kvm_set_kernel_irqchip(Object *obj, Visitor *v,
3149 const char *name, void *opaque,
3150 Error **errp)
3151{
3152 KVMState *s = KVM_STATE(obj);
3153 OnOffSplit mode;
3154
3155 if (!visit_type_OnOffSplit(v, name, &mode, errp)) {
3156 return;
3157 }
3158 switch (mode) {
3159 case ON_OFF_SPLIT_ON:
3160 s->kernel_irqchip_allowed = true;
3161 s->kernel_irqchip_required = true;
3162 s->kernel_irqchip_split = ON_OFF_AUTO_OFF;
3163 break;
3164 case ON_OFF_SPLIT_OFF:
3165 s->kernel_irqchip_allowed = false;
3166 s->kernel_irqchip_required = false;
3167 s->kernel_irqchip_split = ON_OFF_AUTO_OFF;
3168 break;
3169 case ON_OFF_SPLIT_SPLIT:
3170 s->kernel_irqchip_allowed = true;
3171 s->kernel_irqchip_required = true;
3172 s->kernel_irqchip_split = ON_OFF_AUTO_ON;
3173 break;
3174 default:
3175
3176
3177
3178 abort();
3179 }
3180}
3181
3182bool kvm_kernel_irqchip_allowed(void)
3183{
3184 return kvm_state->kernel_irqchip_allowed;
3185}
3186
3187bool kvm_kernel_irqchip_required(void)
3188{
3189 return kvm_state->kernel_irqchip_required;
3190}
3191
3192bool kvm_kernel_irqchip_split(void)
3193{
3194 return kvm_state->kernel_irqchip_split == ON_OFF_AUTO_ON;
3195}
3196
3197static void kvm_accel_instance_init(Object *obj)
3198{
3199 KVMState *s = KVM_STATE(obj);
3200
3201 s->kvm_shadow_mem = -1;
3202 s->kernel_irqchip_allowed = true;
3203 s->kernel_irqchip_split = ON_OFF_AUTO_AUTO;
3204}
3205
3206static void kvm_accel_class_init(ObjectClass *oc, void *data)
3207{
3208 AccelClass *ac = ACCEL_CLASS(oc);
3209 ac->name = "KVM";
3210 ac->init_machine = kvm_init;
3211 ac->has_memory = kvm_accel_has_memory;
3212 ac->allowed = &kvm_allowed;
3213
3214 object_class_property_add(oc, "kernel-irqchip", "on|off|split",
3215 NULL, kvm_set_kernel_irqchip,
3216 NULL, NULL);
3217 object_class_property_set_description(oc, "kernel-irqchip",
3218 "Configure KVM in-kernel irqchip");
3219
3220 object_class_property_add(oc, "kvm-shadow-mem", "int",
3221 kvm_get_kvm_shadow_mem, kvm_set_kvm_shadow_mem,
3222 NULL, NULL);
3223 object_class_property_set_description(oc, "kvm-shadow-mem",
3224 "KVM shadow MMU size");
3225}
3226
3227static const TypeInfo kvm_accel_type = {
3228 .name = TYPE_KVM_ACCEL,
3229 .parent = TYPE_ACCEL,
3230 .instance_init = kvm_accel_instance_init,
3231 .class_init = kvm_accel_class_init,
3232 .instance_size = sizeof(KVMState),
3233};
3234
3235static void kvm_type_init(void)
3236{
3237 type_register_static(&kvm_accel_type);
3238}
3239
3240type_init(kvm_type_init);
3241