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