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7#include <linux/bug.h>
8#include <linux/cpu_pm.h>
9#include <linux/errno.h>
10#include <linux/err.h>
11#include <linux/kvm_host.h>
12#include <linux/list.h>
13#include <linux/module.h>
14#include <linux/vmalloc.h>
15#include <linux/fs.h>
16#include <linux/mman.h>
17#include <linux/sched.h>
18#include <linux/kvm.h>
19#include <linux/kvm_irqfd.h>
20#include <linux/irqbypass.h>
21#include <linux/sched/stat.h>
22#include <trace/events/kvm.h>
23
24#define CREATE_TRACE_POINTS
25#include "trace.h"
26
27#include <linux/uaccess.h>
28#include <asm/ptrace.h>
29#include <asm/mman.h>
30#include <asm/tlbflush.h>
31#include <asm/cacheflush.h>
32#include <asm/cpufeature.h>
33#include <asm/virt.h>
34#include <asm/kvm_arm.h>
35#include <asm/kvm_asm.h>
36#include <asm/kvm_mmu.h>
37#include <asm/kvm_emulate.h>
38#include <asm/kvm_coproc.h>
39#include <asm/sections.h>
40
41#include <kvm/arm_hypercalls.h>
42#include <kvm/arm_pmu.h>
43#include <kvm/arm_psci.h>
44
45#ifdef REQUIRES_VIRT
46__asm__(".arch_extension virt");
47#endif
48
49DEFINE_PER_CPU(kvm_host_data_t, kvm_host_data);
50static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page);
51
52
53static atomic64_t kvm_vmid_gen = ATOMIC64_INIT(1);
54static u32 kvm_next_vmid;
55static DEFINE_SPINLOCK(kvm_vmid_lock);
56
57static bool vgic_present;
58
59static DEFINE_PER_CPU(unsigned char, kvm_arm_hardware_enabled);
60DEFINE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
61
62int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
63{
64 return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE;
65}
66
67int kvm_arch_hardware_setup(void)
68{
69 return 0;
70}
71
72int kvm_arch_check_processor_compat(void)
73{
74 return 0;
75}
76
77int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
78 struct kvm_enable_cap *cap)
79{
80 int r;
81
82 if (cap->flags)
83 return -EINVAL;
84
85 switch (cap->cap) {
86 case KVM_CAP_ARM_NISV_TO_USER:
87 r = 0;
88 kvm->arch.return_nisv_io_abort_to_user = true;
89 break;
90 default:
91 r = -EINVAL;
92 break;
93 }
94
95 return r;
96}
97
98
99
100
101
102int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
103{
104 int ret, cpu;
105
106 ret = kvm_arm_setup_stage2(kvm, type);
107 if (ret)
108 return ret;
109
110 kvm->arch.last_vcpu_ran = alloc_percpu(typeof(*kvm->arch.last_vcpu_ran));
111 if (!kvm->arch.last_vcpu_ran)
112 return -ENOMEM;
113
114 for_each_possible_cpu(cpu)
115 *per_cpu_ptr(kvm->arch.last_vcpu_ran, cpu) = -1;
116
117 ret = kvm_alloc_stage2_pgd(kvm);
118 if (ret)
119 goto out_fail_alloc;
120
121 ret = create_hyp_mappings(kvm, kvm + 1, PAGE_HYP);
122 if (ret)
123 goto out_free_stage2_pgd;
124
125 kvm_vgic_early_init(kvm);
126
127
128 kvm->arch.vmid.vmid_gen = 0;
129
130
131 kvm->arch.max_vcpus = vgic_present ?
132 kvm_vgic_get_max_vcpus() : KVM_MAX_VCPUS;
133
134 return ret;
135out_free_stage2_pgd:
136 kvm_free_stage2_pgd(kvm);
137out_fail_alloc:
138 free_percpu(kvm->arch.last_vcpu_ran);
139 kvm->arch.last_vcpu_ran = NULL;
140 return ret;
141}
142
143int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
144{
145 return 0;
146}
147
148vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
149{
150 return VM_FAULT_SIGBUS;
151}
152
153
154
155
156
157
158void kvm_arch_destroy_vm(struct kvm *kvm)
159{
160 int i;
161
162 kvm_vgic_destroy(kvm);
163
164 free_percpu(kvm->arch.last_vcpu_ran);
165 kvm->arch.last_vcpu_ran = NULL;
166
167 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
168 if (kvm->vcpus[i]) {
169 kvm_vcpu_destroy(kvm->vcpus[i]);
170 kvm->vcpus[i] = NULL;
171 }
172 }
173 atomic_set(&kvm->online_vcpus, 0);
174}
175
176int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
177{
178 int r;
179 switch (ext) {
180 case KVM_CAP_IRQCHIP:
181 r = vgic_present;
182 break;
183 case KVM_CAP_IOEVENTFD:
184 case KVM_CAP_DEVICE_CTRL:
185 case KVM_CAP_USER_MEMORY:
186 case KVM_CAP_SYNC_MMU:
187 case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
188 case KVM_CAP_ONE_REG:
189 case KVM_CAP_ARM_PSCI:
190 case KVM_CAP_ARM_PSCI_0_2:
191 case KVM_CAP_READONLY_MEM:
192 case KVM_CAP_MP_STATE:
193 case KVM_CAP_IMMEDIATE_EXIT:
194 case KVM_CAP_VCPU_EVENTS:
195 case KVM_CAP_ARM_IRQ_LINE_LAYOUT_2:
196 case KVM_CAP_ARM_NISV_TO_USER:
197 case KVM_CAP_ARM_INJECT_EXT_DABT:
198 r = 1;
199 break;
200 case KVM_CAP_ARM_SET_DEVICE_ADDR:
201 r = 1;
202 break;
203 case KVM_CAP_NR_VCPUS:
204 r = num_online_cpus();
205 break;
206 case KVM_CAP_MAX_VCPUS:
207 r = KVM_MAX_VCPUS;
208 break;
209 case KVM_CAP_MAX_VCPU_ID:
210 r = KVM_MAX_VCPU_ID;
211 break;
212 case KVM_CAP_MSI_DEVID:
213 if (!kvm)
214 r = -EINVAL;
215 else
216 r = kvm->arch.vgic.msis_require_devid;
217 break;
218 case KVM_CAP_ARM_USER_IRQ:
219
220
221
222
223 r = 1;
224 break;
225 default:
226 r = kvm_arch_vm_ioctl_check_extension(kvm, ext);
227 break;
228 }
229 return r;
230}
231
232long kvm_arch_dev_ioctl(struct file *filp,
233 unsigned int ioctl, unsigned long arg)
234{
235 return -EINVAL;
236}
237
238struct kvm *kvm_arch_alloc_vm(void)
239{
240 if (!has_vhe())
241 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
242
243 return vzalloc(sizeof(struct kvm));
244}
245
246void kvm_arch_free_vm(struct kvm *kvm)
247{
248 if (!has_vhe())
249 kfree(kvm);
250 else
251 vfree(kvm);
252}
253
254int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
255{
256 if (irqchip_in_kernel(kvm) && vgic_initialized(kvm))
257 return -EBUSY;
258
259 if (id >= kvm->arch.max_vcpus)
260 return -EINVAL;
261
262 return 0;
263}
264
265int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
266{
267 int err;
268
269
270 vcpu->arch.target = -1;
271 bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
272
273
274 kvm_timer_vcpu_init(vcpu);
275
276 kvm_pmu_vcpu_init(vcpu);
277
278 kvm_arm_reset_debug_ptr(vcpu);
279
280 kvm_arm_pvtime_vcpu_init(&vcpu->arch);
281
282 err = kvm_vgic_vcpu_init(vcpu);
283 if (err)
284 return err;
285
286 return create_hyp_mappings(vcpu, vcpu + 1, PAGE_HYP);
287}
288
289void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
290{
291}
292
293void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
294{
295 if (vcpu->arch.has_run_once && unlikely(!irqchip_in_kernel(vcpu->kvm)))
296 static_branch_dec(&userspace_irqchip_in_use);
297
298 kvm_mmu_free_memory_caches(vcpu);
299 kvm_timer_vcpu_terminate(vcpu);
300 kvm_pmu_vcpu_destroy(vcpu);
301
302 kvm_arm_vcpu_destroy(vcpu);
303}
304
305int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
306{
307 return kvm_timer_is_pending(vcpu);
308}
309
310void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu)
311{
312
313
314
315
316
317
318
319
320
321
322 preempt_disable();
323 kvm_vgic_vmcr_sync(vcpu);
324 vgic_v4_put(vcpu, true);
325 preempt_enable();
326}
327
328void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)
329{
330 preempt_disable();
331 vgic_v4_load(vcpu);
332 preempt_enable();
333}
334
335void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
336{
337 int *last_ran;
338 kvm_host_data_t *cpu_data;
339
340 last_ran = this_cpu_ptr(vcpu->kvm->arch.last_vcpu_ran);
341 cpu_data = this_cpu_ptr(&kvm_host_data);
342
343
344
345
346
347 if (*last_ran != vcpu->vcpu_id) {
348 kvm_call_hyp(__kvm_tlb_flush_local_vmid, vcpu);
349 *last_ran = vcpu->vcpu_id;
350 }
351
352 vcpu->cpu = cpu;
353 vcpu->arch.host_cpu_context = &cpu_data->host_ctxt;
354
355 kvm_vgic_load(vcpu);
356 kvm_timer_vcpu_load(vcpu);
357 kvm_vcpu_load_sysregs(vcpu);
358 kvm_arch_vcpu_load_fp(vcpu);
359 kvm_vcpu_pmu_restore_guest(vcpu);
360 if (kvm_arm_is_pvtime_enabled(&vcpu->arch))
361 kvm_make_request(KVM_REQ_RECORD_STEAL, vcpu);
362
363 if (single_task_running())
364 vcpu_clear_wfx_traps(vcpu);
365 else
366 vcpu_set_wfx_traps(vcpu);
367
368 vcpu_ptrauth_setup_lazy(vcpu);
369}
370
371void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
372{
373 kvm_arch_vcpu_put_fp(vcpu);
374 kvm_vcpu_put_sysregs(vcpu);
375 kvm_timer_vcpu_put(vcpu);
376 kvm_vgic_put(vcpu);
377 kvm_vcpu_pmu_restore_host(vcpu);
378
379 vcpu->cpu = -1;
380}
381
382static void vcpu_power_off(struct kvm_vcpu *vcpu)
383{
384 vcpu->arch.power_off = true;
385 kvm_make_request(KVM_REQ_SLEEP, vcpu);
386 kvm_vcpu_kick(vcpu);
387}
388
389int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
390 struct kvm_mp_state *mp_state)
391{
392 if (vcpu->arch.power_off)
393 mp_state->mp_state = KVM_MP_STATE_STOPPED;
394 else
395 mp_state->mp_state = KVM_MP_STATE_RUNNABLE;
396
397 return 0;
398}
399
400int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
401 struct kvm_mp_state *mp_state)
402{
403 int ret = 0;
404
405 switch (mp_state->mp_state) {
406 case KVM_MP_STATE_RUNNABLE:
407 vcpu->arch.power_off = false;
408 break;
409 case KVM_MP_STATE_STOPPED:
410 vcpu_power_off(vcpu);
411 break;
412 default:
413 ret = -EINVAL;
414 }
415
416 return ret;
417}
418
419
420
421
422
423
424
425
426int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
427{
428 bool irq_lines = *vcpu_hcr(v) & (HCR_VI | HCR_VF);
429 return ((irq_lines || kvm_vgic_vcpu_pending_irq(v))
430 && !v->arch.power_off && !v->arch.pause);
431}
432
433bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
434{
435 return vcpu_mode_priv(vcpu);
436}
437
438
439static void exit_vm_noop(void *info)
440{
441}
442
443void force_vm_exit(const cpumask_t *mask)
444{
445 preempt_disable();
446 smp_call_function_many(mask, exit_vm_noop, NULL, true);
447 preempt_enable();
448}
449
450
451
452
453
454
455
456
457
458
459
460
461
462static bool need_new_vmid_gen(struct kvm_vmid *vmid)
463{
464 u64 current_vmid_gen = atomic64_read(&kvm_vmid_gen);
465 smp_rmb();
466 return unlikely(READ_ONCE(vmid->vmid_gen) != current_vmid_gen);
467}
468
469
470
471
472
473
474static void update_vmid(struct kvm_vmid *vmid)
475{
476 if (!need_new_vmid_gen(vmid))
477 return;
478
479 spin_lock(&kvm_vmid_lock);
480
481
482
483
484
485
486 if (!need_new_vmid_gen(vmid)) {
487 spin_unlock(&kvm_vmid_lock);
488 return;
489 }
490
491
492 if (unlikely(kvm_next_vmid == 0)) {
493 atomic64_inc(&kvm_vmid_gen);
494 kvm_next_vmid = 1;
495
496
497
498
499
500
501 force_vm_exit(cpu_all_mask);
502
503
504
505
506
507 kvm_call_hyp(__kvm_flush_vm_context);
508 }
509
510 vmid->vmid = kvm_next_vmid;
511 kvm_next_vmid++;
512 kvm_next_vmid &= (1 << kvm_get_vmid_bits()) - 1;
513
514 smp_wmb();
515 WRITE_ONCE(vmid->vmid_gen, atomic64_read(&kvm_vmid_gen));
516
517 spin_unlock(&kvm_vmid_lock);
518}
519
520static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
521{
522 struct kvm *kvm = vcpu->kvm;
523 int ret = 0;
524
525 if (likely(vcpu->arch.has_run_once))
526 return 0;
527
528 if (!kvm_arm_vcpu_is_finalized(vcpu))
529 return -EPERM;
530
531 vcpu->arch.has_run_once = true;
532
533 if (likely(irqchip_in_kernel(kvm))) {
534
535
536
537
538 if (unlikely(!vgic_ready(kvm))) {
539 ret = kvm_vgic_map_resources(kvm);
540 if (ret)
541 return ret;
542 }
543 } else {
544
545
546
547
548 static_branch_inc(&userspace_irqchip_in_use);
549 }
550
551 ret = kvm_timer_enable(vcpu);
552 if (ret)
553 return ret;
554
555 ret = kvm_arm_pmu_v3_enable(vcpu);
556
557 return ret;
558}
559
560bool kvm_arch_intc_initialized(struct kvm *kvm)
561{
562 return vgic_initialized(kvm);
563}
564
565void kvm_arm_halt_guest(struct kvm *kvm)
566{
567 int i;
568 struct kvm_vcpu *vcpu;
569
570 kvm_for_each_vcpu(i, vcpu, kvm)
571 vcpu->arch.pause = true;
572 kvm_make_all_cpus_request(kvm, KVM_REQ_SLEEP);
573}
574
575void kvm_arm_resume_guest(struct kvm *kvm)
576{
577 int i;
578 struct kvm_vcpu *vcpu;
579
580 kvm_for_each_vcpu(i, vcpu, kvm) {
581 vcpu->arch.pause = false;
582 swake_up_one(kvm_arch_vcpu_wq(vcpu));
583 }
584}
585
586static void vcpu_req_sleep(struct kvm_vcpu *vcpu)
587{
588 struct swait_queue_head *wq = kvm_arch_vcpu_wq(vcpu);
589
590 swait_event_interruptible_exclusive(*wq, ((!vcpu->arch.power_off) &&
591 (!vcpu->arch.pause)));
592
593 if (vcpu->arch.power_off || vcpu->arch.pause) {
594
595 kvm_make_request(KVM_REQ_SLEEP, vcpu);
596 }
597
598
599
600
601
602
603 smp_rmb();
604}
605
606static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu)
607{
608 return vcpu->arch.target >= 0;
609}
610
611static void check_vcpu_requests(struct kvm_vcpu *vcpu)
612{
613 if (kvm_request_pending(vcpu)) {
614 if (kvm_check_request(KVM_REQ_SLEEP, vcpu))
615 vcpu_req_sleep(vcpu);
616
617 if (kvm_check_request(KVM_REQ_VCPU_RESET, vcpu))
618 kvm_reset_vcpu(vcpu);
619
620
621
622
623
624 kvm_check_request(KVM_REQ_IRQ_PENDING, vcpu);
625
626 if (kvm_check_request(KVM_REQ_RECORD_STEAL, vcpu))
627 kvm_update_stolen_time(vcpu);
628 }
629}
630
631
632
633
634
635
636
637
638
639
640
641
642int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
643{
644 int ret;
645
646 if (unlikely(!kvm_vcpu_initialized(vcpu)))
647 return -ENOEXEC;
648
649 ret = kvm_vcpu_first_run_init(vcpu);
650 if (ret)
651 return ret;
652
653 if (run->exit_reason == KVM_EXIT_MMIO) {
654 ret = kvm_handle_mmio_return(vcpu, vcpu->run);
655 if (ret)
656 return ret;
657 }
658
659 if (run->immediate_exit)
660 return -EINTR;
661
662 vcpu_load(vcpu);
663
664 kvm_sigset_activate(vcpu);
665
666 ret = 1;
667 run->exit_reason = KVM_EXIT_UNKNOWN;
668 while (ret > 0) {
669
670
671
672 cond_resched();
673
674 update_vmid(&vcpu->kvm->arch.vmid);
675
676 check_vcpu_requests(vcpu);
677
678
679
680
681
682
683 preempt_disable();
684
685 kvm_pmu_flush_hwstate(vcpu);
686
687 local_irq_disable();
688
689 kvm_vgic_flush_hwstate(vcpu);
690
691
692
693
694
695 if (signal_pending(current)) {
696 ret = -EINTR;
697 run->exit_reason = KVM_EXIT_INTR;
698 }
699
700
701
702
703
704
705
706
707 if (static_branch_unlikely(&userspace_irqchip_in_use)) {
708 if (kvm_timer_should_notify_user(vcpu) ||
709 kvm_pmu_should_notify_user(vcpu)) {
710 ret = -EINTR;
711 run->exit_reason = KVM_EXIT_INTR;
712 }
713 }
714
715
716
717
718
719
720
721 smp_store_mb(vcpu->mode, IN_GUEST_MODE);
722
723 if (ret <= 0 || need_new_vmid_gen(&vcpu->kvm->arch.vmid) ||
724 kvm_request_pending(vcpu)) {
725 vcpu->mode = OUTSIDE_GUEST_MODE;
726 isb();
727 kvm_pmu_sync_hwstate(vcpu);
728 if (static_branch_unlikely(&userspace_irqchip_in_use))
729 kvm_timer_sync_hwstate(vcpu);
730 kvm_vgic_sync_hwstate(vcpu);
731 local_irq_enable();
732 preempt_enable();
733 continue;
734 }
735
736 kvm_arm_setup_debug(vcpu);
737
738
739
740
741 trace_kvm_entry(*vcpu_pc(vcpu));
742 guest_enter_irqoff();
743
744 if (has_vhe()) {
745 ret = kvm_vcpu_run_vhe(vcpu);
746 } else {
747 ret = kvm_call_hyp_ret(__kvm_vcpu_run_nvhe, vcpu);
748 }
749
750 vcpu->mode = OUTSIDE_GUEST_MODE;
751 vcpu->stat.exits++;
752
753
754
755
756 kvm_arm_clear_debug(vcpu);
757
758
759
760
761
762
763 kvm_pmu_sync_hwstate(vcpu);
764
765
766
767
768
769
770 kvm_vgic_sync_hwstate(vcpu);
771
772
773
774
775
776
777 if (static_branch_unlikely(&userspace_irqchip_in_use))
778 kvm_timer_sync_hwstate(vcpu);
779
780 kvm_arch_vcpu_ctxsync_fp(vcpu);
781
782
783
784
785
786
787
788
789
790
791
792 local_irq_enable();
793
794
795
796
797
798
799
800
801
802 guest_exit();
803 trace_kvm_exit(ret, kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu));
804
805
806 handle_exit_early(vcpu, run, ret);
807
808 preempt_enable();
809
810 ret = handle_exit(vcpu, run, ret);
811 }
812
813
814 if (unlikely(!irqchip_in_kernel(vcpu->kvm))) {
815 kvm_timer_update_run(vcpu);
816 kvm_pmu_update_run(vcpu);
817 }
818
819 kvm_sigset_deactivate(vcpu);
820
821 vcpu_put(vcpu);
822 return ret;
823}
824
825static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level)
826{
827 int bit_index;
828 bool set;
829 unsigned long *hcr;
830
831 if (number == KVM_ARM_IRQ_CPU_IRQ)
832 bit_index = __ffs(HCR_VI);
833 else
834 bit_index = __ffs(HCR_VF);
835
836 hcr = vcpu_hcr(vcpu);
837 if (level)
838 set = test_and_set_bit(bit_index, hcr);
839 else
840 set = test_and_clear_bit(bit_index, hcr);
841
842
843
844
845 if (set == level)
846 return 0;
847
848
849
850
851
852
853 kvm_make_request(KVM_REQ_IRQ_PENDING, vcpu);
854 kvm_vcpu_kick(vcpu);
855
856 return 0;
857}
858
859int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
860 bool line_status)
861{
862 u32 irq = irq_level->irq;
863 unsigned int irq_type, vcpu_idx, irq_num;
864 int nrcpus = atomic_read(&kvm->online_vcpus);
865 struct kvm_vcpu *vcpu = NULL;
866 bool level = irq_level->level;
867
868 irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK;
869 vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK;
870 vcpu_idx += ((irq >> KVM_ARM_IRQ_VCPU2_SHIFT) & KVM_ARM_IRQ_VCPU2_MASK) * (KVM_ARM_IRQ_VCPU_MASK + 1);
871 irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK;
872
873 trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level);
874
875 switch (irq_type) {
876 case KVM_ARM_IRQ_TYPE_CPU:
877 if (irqchip_in_kernel(kvm))
878 return -ENXIO;
879
880 if (vcpu_idx >= nrcpus)
881 return -EINVAL;
882
883 vcpu = kvm_get_vcpu(kvm, vcpu_idx);
884 if (!vcpu)
885 return -EINVAL;
886
887 if (irq_num > KVM_ARM_IRQ_CPU_FIQ)
888 return -EINVAL;
889
890 return vcpu_interrupt_line(vcpu, irq_num, level);
891 case KVM_ARM_IRQ_TYPE_PPI:
892 if (!irqchip_in_kernel(kvm))
893 return -ENXIO;
894
895 if (vcpu_idx >= nrcpus)
896 return -EINVAL;
897
898 vcpu = kvm_get_vcpu(kvm, vcpu_idx);
899 if (!vcpu)
900 return -EINVAL;
901
902 if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS)
903 return -EINVAL;
904
905 return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level, NULL);
906 case KVM_ARM_IRQ_TYPE_SPI:
907 if (!irqchip_in_kernel(kvm))
908 return -ENXIO;
909
910 if (irq_num < VGIC_NR_PRIVATE_IRQS)
911 return -EINVAL;
912
913 return kvm_vgic_inject_irq(kvm, 0, irq_num, level, NULL);
914 }
915
916 return -EINVAL;
917}
918
919static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
920 const struct kvm_vcpu_init *init)
921{
922 unsigned int i, ret;
923 int phys_target = kvm_target_cpu();
924
925 if (init->target != phys_target)
926 return -EINVAL;
927
928
929
930
931
932 if (vcpu->arch.target != -1 && vcpu->arch.target != init->target)
933 return -EINVAL;
934
935
936 for (i = 0; i < sizeof(init->features) * 8; i++) {
937 bool set = (init->features[i / 32] & (1 << (i % 32)));
938
939 if (set && i >= KVM_VCPU_MAX_FEATURES)
940 return -ENOENT;
941
942
943
944
945
946 if (vcpu->arch.target != -1 && i < KVM_VCPU_MAX_FEATURES &&
947 test_bit(i, vcpu->arch.features) != set)
948 return -EINVAL;
949
950 if (set)
951 set_bit(i, vcpu->arch.features);
952 }
953
954 vcpu->arch.target = phys_target;
955
956
957 ret = kvm_reset_vcpu(vcpu);
958 if (ret) {
959 vcpu->arch.target = -1;
960 bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
961 }
962
963 return ret;
964}
965
966static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu,
967 struct kvm_vcpu_init *init)
968{
969 int ret;
970
971 ret = kvm_vcpu_set_target(vcpu, init);
972 if (ret)
973 return ret;
974
975
976
977
978
979 if (vcpu->arch.has_run_once)
980 stage2_unmap_vm(vcpu->kvm);
981
982 vcpu_reset_hcr(vcpu);
983
984
985
986
987 if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features))
988 vcpu_power_off(vcpu);
989 else
990 vcpu->arch.power_off = false;
991
992 return 0;
993}
994
995static int kvm_arm_vcpu_set_attr(struct kvm_vcpu *vcpu,
996 struct kvm_device_attr *attr)
997{
998 int ret = -ENXIO;
999
1000 switch (attr->group) {
1001 default:
1002 ret = kvm_arm_vcpu_arch_set_attr(vcpu, attr);
1003 break;
1004 }
1005
1006 return ret;
1007}
1008
1009static int kvm_arm_vcpu_get_attr(struct kvm_vcpu *vcpu,
1010 struct kvm_device_attr *attr)
1011{
1012 int ret = -ENXIO;
1013
1014 switch (attr->group) {
1015 default:
1016 ret = kvm_arm_vcpu_arch_get_attr(vcpu, attr);
1017 break;
1018 }
1019
1020 return ret;
1021}
1022
1023static int kvm_arm_vcpu_has_attr(struct kvm_vcpu *vcpu,
1024 struct kvm_device_attr *attr)
1025{
1026 int ret = -ENXIO;
1027
1028 switch (attr->group) {
1029 default:
1030 ret = kvm_arm_vcpu_arch_has_attr(vcpu, attr);
1031 break;
1032 }
1033
1034 return ret;
1035}
1036
1037static int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,
1038 struct kvm_vcpu_events *events)
1039{
1040 memset(events, 0, sizeof(*events));
1041
1042 return __kvm_arm_vcpu_get_events(vcpu, events);
1043}
1044
1045static int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
1046 struct kvm_vcpu_events *events)
1047{
1048 int i;
1049
1050
1051 for (i = 0; i < ARRAY_SIZE(events->reserved); i++)
1052 if (events->reserved[i])
1053 return -EINVAL;
1054
1055
1056 for (i = 0; i < ARRAY_SIZE(events->exception.pad); i++)
1057 if (events->exception.pad[i])
1058 return -EINVAL;
1059
1060 return __kvm_arm_vcpu_set_events(vcpu, events);
1061}
1062
1063long kvm_arch_vcpu_ioctl(struct file *filp,
1064 unsigned int ioctl, unsigned long arg)
1065{
1066 struct kvm_vcpu *vcpu = filp->private_data;
1067 void __user *argp = (void __user *)arg;
1068 struct kvm_device_attr attr;
1069 long r;
1070
1071 switch (ioctl) {
1072 case KVM_ARM_VCPU_INIT: {
1073 struct kvm_vcpu_init init;
1074
1075 r = -EFAULT;
1076 if (copy_from_user(&init, argp, sizeof(init)))
1077 break;
1078
1079 r = kvm_arch_vcpu_ioctl_vcpu_init(vcpu, &init);
1080 break;
1081 }
1082 case KVM_SET_ONE_REG:
1083 case KVM_GET_ONE_REG: {
1084 struct kvm_one_reg reg;
1085
1086 r = -ENOEXEC;
1087 if (unlikely(!kvm_vcpu_initialized(vcpu)))
1088 break;
1089
1090 r = -EFAULT;
1091 if (copy_from_user(®, argp, sizeof(reg)))
1092 break;
1093
1094 if (ioctl == KVM_SET_ONE_REG)
1095 r = kvm_arm_set_reg(vcpu, ®);
1096 else
1097 r = kvm_arm_get_reg(vcpu, ®);
1098 break;
1099 }
1100 case KVM_GET_REG_LIST: {
1101 struct kvm_reg_list __user *user_list = argp;
1102 struct kvm_reg_list reg_list;
1103 unsigned n;
1104
1105 r = -ENOEXEC;
1106 if (unlikely(!kvm_vcpu_initialized(vcpu)))
1107 break;
1108
1109 r = -EPERM;
1110 if (!kvm_arm_vcpu_is_finalized(vcpu))
1111 break;
1112
1113 r = -EFAULT;
1114 if (copy_from_user(®_list, user_list, sizeof(reg_list)))
1115 break;
1116 n = reg_list.n;
1117 reg_list.n = kvm_arm_num_regs(vcpu);
1118 if (copy_to_user(user_list, ®_list, sizeof(reg_list)))
1119 break;
1120 r = -E2BIG;
1121 if (n < reg_list.n)
1122 break;
1123 r = kvm_arm_copy_reg_indices(vcpu, user_list->reg);
1124 break;
1125 }
1126 case KVM_SET_DEVICE_ATTR: {
1127 r = -EFAULT;
1128 if (copy_from_user(&attr, argp, sizeof(attr)))
1129 break;
1130 r = kvm_arm_vcpu_set_attr(vcpu, &attr);
1131 break;
1132 }
1133 case KVM_GET_DEVICE_ATTR: {
1134 r = -EFAULT;
1135 if (copy_from_user(&attr, argp, sizeof(attr)))
1136 break;
1137 r = kvm_arm_vcpu_get_attr(vcpu, &attr);
1138 break;
1139 }
1140 case KVM_HAS_DEVICE_ATTR: {
1141 r = -EFAULT;
1142 if (copy_from_user(&attr, argp, sizeof(attr)))
1143 break;
1144 r = kvm_arm_vcpu_has_attr(vcpu, &attr);
1145 break;
1146 }
1147 case KVM_GET_VCPU_EVENTS: {
1148 struct kvm_vcpu_events events;
1149
1150 if (kvm_arm_vcpu_get_events(vcpu, &events))
1151 return -EINVAL;
1152
1153 if (copy_to_user(argp, &events, sizeof(events)))
1154 return -EFAULT;
1155
1156 return 0;
1157 }
1158 case KVM_SET_VCPU_EVENTS: {
1159 struct kvm_vcpu_events events;
1160
1161 if (copy_from_user(&events, argp, sizeof(events)))
1162 return -EFAULT;
1163
1164 return kvm_arm_vcpu_set_events(vcpu, &events);
1165 }
1166 case KVM_ARM_VCPU_FINALIZE: {
1167 int what;
1168
1169 if (!kvm_vcpu_initialized(vcpu))
1170 return -ENOEXEC;
1171
1172 if (get_user(what, (const int __user *)argp))
1173 return -EFAULT;
1174
1175 return kvm_arm_vcpu_finalize(vcpu, what);
1176 }
1177 default:
1178 r = -EINVAL;
1179 }
1180
1181 return r;
1182}
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1204{
1205 bool flush = false;
1206 int r;
1207
1208 mutex_lock(&kvm->slots_lock);
1209
1210 r = kvm_get_dirty_log_protect(kvm, log, &flush);
1211
1212 if (flush)
1213 kvm_flush_remote_tlbs(kvm);
1214
1215 mutex_unlock(&kvm->slots_lock);
1216 return r;
1217}
1218
1219int kvm_vm_ioctl_clear_dirty_log(struct kvm *kvm, struct kvm_clear_dirty_log *log)
1220{
1221 bool flush = false;
1222 int r;
1223
1224 mutex_lock(&kvm->slots_lock);
1225
1226 r = kvm_clear_dirty_log_protect(kvm, log, &flush);
1227
1228 if (flush)
1229 kvm_flush_remote_tlbs(kvm);
1230
1231 mutex_unlock(&kvm->slots_lock);
1232 return r;
1233}
1234
1235static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm,
1236 struct kvm_arm_device_addr *dev_addr)
1237{
1238 unsigned long dev_id, type;
1239
1240 dev_id = (dev_addr->id & KVM_ARM_DEVICE_ID_MASK) >>
1241 KVM_ARM_DEVICE_ID_SHIFT;
1242 type = (dev_addr->id & KVM_ARM_DEVICE_TYPE_MASK) >>
1243 KVM_ARM_DEVICE_TYPE_SHIFT;
1244
1245 switch (dev_id) {
1246 case KVM_ARM_DEVICE_VGIC_V2:
1247 if (!vgic_present)
1248 return -ENXIO;
1249 return kvm_vgic_addr(kvm, type, &dev_addr->addr, true);
1250 default:
1251 return -ENODEV;
1252 }
1253}
1254
1255long kvm_arch_vm_ioctl(struct file *filp,
1256 unsigned int ioctl, unsigned long arg)
1257{
1258 struct kvm *kvm = filp->private_data;
1259 void __user *argp = (void __user *)arg;
1260
1261 switch (ioctl) {
1262 case KVM_CREATE_IRQCHIP: {
1263 int ret;
1264 if (!vgic_present)
1265 return -ENXIO;
1266 mutex_lock(&kvm->lock);
1267 ret = kvm_vgic_create(kvm, KVM_DEV_TYPE_ARM_VGIC_V2);
1268 mutex_unlock(&kvm->lock);
1269 return ret;
1270 }
1271 case KVM_ARM_SET_DEVICE_ADDR: {
1272 struct kvm_arm_device_addr dev_addr;
1273
1274 if (copy_from_user(&dev_addr, argp, sizeof(dev_addr)))
1275 return -EFAULT;
1276 return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr);
1277 }
1278 case KVM_ARM_PREFERRED_TARGET: {
1279 int err;
1280 struct kvm_vcpu_init init;
1281
1282 err = kvm_vcpu_preferred_target(&init);
1283 if (err)
1284 return err;
1285
1286 if (copy_to_user(argp, &init, sizeof(init)))
1287 return -EFAULT;
1288
1289 return 0;
1290 }
1291 default:
1292 return -EINVAL;
1293 }
1294}
1295
1296static void cpu_init_hyp_mode(void)
1297{
1298 phys_addr_t pgd_ptr;
1299 unsigned long hyp_stack_ptr;
1300 unsigned long stack_page;
1301 unsigned long vector_ptr;
1302
1303
1304 __hyp_set_vectors(kvm_get_idmap_vector());
1305
1306 pgd_ptr = kvm_mmu_get_httbr();
1307 stack_page = __this_cpu_read(kvm_arm_hyp_stack_page);
1308 hyp_stack_ptr = stack_page + PAGE_SIZE;
1309 vector_ptr = (unsigned long)kvm_get_hyp_vector();
1310
1311 __cpu_init_hyp_mode(pgd_ptr, hyp_stack_ptr, vector_ptr);
1312 __cpu_init_stage2();
1313}
1314
1315static void cpu_hyp_reset(void)
1316{
1317 if (!is_kernel_in_hyp_mode())
1318 __hyp_reset_vectors();
1319}
1320
1321static void cpu_hyp_reinit(void)
1322{
1323 kvm_init_host_cpu_context(&this_cpu_ptr(&kvm_host_data)->host_ctxt);
1324
1325 cpu_hyp_reset();
1326
1327 if (is_kernel_in_hyp_mode())
1328 kvm_timer_init_vhe();
1329 else
1330 cpu_init_hyp_mode();
1331
1332 kvm_arm_init_debug();
1333
1334 if (vgic_present)
1335 kvm_vgic_init_cpu_hardware();
1336}
1337
1338static void _kvm_arch_hardware_enable(void *discard)
1339{
1340 if (!__this_cpu_read(kvm_arm_hardware_enabled)) {
1341 cpu_hyp_reinit();
1342 __this_cpu_write(kvm_arm_hardware_enabled, 1);
1343 }
1344}
1345
1346int kvm_arch_hardware_enable(void)
1347{
1348 _kvm_arch_hardware_enable(NULL);
1349 return 0;
1350}
1351
1352static void _kvm_arch_hardware_disable(void *discard)
1353{
1354 if (__this_cpu_read(kvm_arm_hardware_enabled)) {
1355 cpu_hyp_reset();
1356 __this_cpu_write(kvm_arm_hardware_enabled, 0);
1357 }
1358}
1359
1360void kvm_arch_hardware_disable(void)
1361{
1362 _kvm_arch_hardware_disable(NULL);
1363}
1364
1365#ifdef CONFIG_CPU_PM
1366static int hyp_init_cpu_pm_notifier(struct notifier_block *self,
1367 unsigned long cmd,
1368 void *v)
1369{
1370
1371
1372
1373
1374
1375 switch (cmd) {
1376 case CPU_PM_ENTER:
1377 if (__this_cpu_read(kvm_arm_hardware_enabled))
1378
1379
1380
1381
1382
1383 cpu_hyp_reset();
1384
1385 return NOTIFY_OK;
1386 case CPU_PM_ENTER_FAILED:
1387 case CPU_PM_EXIT:
1388 if (__this_cpu_read(kvm_arm_hardware_enabled))
1389
1390 cpu_hyp_reinit();
1391
1392 return NOTIFY_OK;
1393
1394 default:
1395 return NOTIFY_DONE;
1396 }
1397}
1398
1399static struct notifier_block hyp_init_cpu_pm_nb = {
1400 .notifier_call = hyp_init_cpu_pm_notifier,
1401};
1402
1403static void __init hyp_cpu_pm_init(void)
1404{
1405 cpu_pm_register_notifier(&hyp_init_cpu_pm_nb);
1406}
1407static void __init hyp_cpu_pm_exit(void)
1408{
1409 cpu_pm_unregister_notifier(&hyp_init_cpu_pm_nb);
1410}
1411#else
1412static inline void hyp_cpu_pm_init(void)
1413{
1414}
1415static inline void hyp_cpu_pm_exit(void)
1416{
1417}
1418#endif
1419
1420static int init_common_resources(void)
1421{
1422 kvm_set_ipa_limit();
1423
1424 return 0;
1425}
1426
1427static int init_subsystems(void)
1428{
1429 int err = 0;
1430
1431
1432
1433
1434 on_each_cpu(_kvm_arch_hardware_enable, NULL, 1);
1435
1436
1437
1438
1439 hyp_cpu_pm_init();
1440
1441
1442
1443
1444 err = kvm_vgic_hyp_init();
1445 switch (err) {
1446 case 0:
1447 vgic_present = true;
1448 break;
1449 case -ENODEV:
1450 case -ENXIO:
1451 vgic_present = false;
1452 err = 0;
1453 break;
1454 default:
1455 goto out;
1456 }
1457
1458
1459
1460
1461 err = kvm_timer_hyp_init(vgic_present);
1462 if (err)
1463 goto out;
1464
1465 kvm_perf_init();
1466 kvm_coproc_table_init();
1467
1468out:
1469 on_each_cpu(_kvm_arch_hardware_disable, NULL, 1);
1470
1471 return err;
1472}
1473
1474static void teardown_hyp_mode(void)
1475{
1476 int cpu;
1477
1478 free_hyp_pgds();
1479 for_each_possible_cpu(cpu)
1480 free_page(per_cpu(kvm_arm_hyp_stack_page, cpu));
1481}
1482
1483
1484
1485
1486static int init_hyp_mode(void)
1487{
1488 int cpu;
1489 int err = 0;
1490
1491
1492
1493
1494 err = kvm_mmu_init();
1495 if (err)
1496 goto out_err;
1497
1498
1499
1500
1501 for_each_possible_cpu(cpu) {
1502 unsigned long stack_page;
1503
1504 stack_page = __get_free_page(GFP_KERNEL);
1505 if (!stack_page) {
1506 err = -ENOMEM;
1507 goto out_err;
1508 }
1509
1510 per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page;
1511 }
1512
1513
1514
1515
1516 err = create_hyp_mappings(kvm_ksym_ref(__hyp_text_start),
1517 kvm_ksym_ref(__hyp_text_end), PAGE_HYP_EXEC);
1518 if (err) {
1519 kvm_err("Cannot map world-switch code\n");
1520 goto out_err;
1521 }
1522
1523 err = create_hyp_mappings(kvm_ksym_ref(__start_rodata),
1524 kvm_ksym_ref(__end_rodata), PAGE_HYP_RO);
1525 if (err) {
1526 kvm_err("Cannot map rodata section\n");
1527 goto out_err;
1528 }
1529
1530 err = create_hyp_mappings(kvm_ksym_ref(__bss_start),
1531 kvm_ksym_ref(__bss_stop), PAGE_HYP_RO);
1532 if (err) {
1533 kvm_err("Cannot map bss section\n");
1534 goto out_err;
1535 }
1536
1537 err = kvm_map_vectors();
1538 if (err) {
1539 kvm_err("Cannot map vectors\n");
1540 goto out_err;
1541 }
1542
1543
1544
1545
1546 for_each_possible_cpu(cpu) {
1547 char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu);
1548 err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE,
1549 PAGE_HYP);
1550
1551 if (err) {
1552 kvm_err("Cannot map hyp stack\n");
1553 goto out_err;
1554 }
1555 }
1556
1557 for_each_possible_cpu(cpu) {
1558 kvm_host_data_t *cpu_data;
1559
1560 cpu_data = per_cpu_ptr(&kvm_host_data, cpu);
1561 err = create_hyp_mappings(cpu_data, cpu_data + 1, PAGE_HYP);
1562
1563 if (err) {
1564 kvm_err("Cannot map host CPU state: %d\n", err);
1565 goto out_err;
1566 }
1567 }
1568
1569 err = hyp_map_aux_data();
1570 if (err)
1571 kvm_err("Cannot map host auxiliary data: %d\n", err);
1572
1573 return 0;
1574
1575out_err:
1576 teardown_hyp_mode();
1577 kvm_err("error initializing Hyp mode: %d\n", err);
1578 return err;
1579}
1580
1581static void check_kvm_target_cpu(void *ret)
1582{
1583 *(int *)ret = kvm_target_cpu();
1584}
1585
1586struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr)
1587{
1588 struct kvm_vcpu *vcpu;
1589 int i;
1590
1591 mpidr &= MPIDR_HWID_BITMASK;
1592 kvm_for_each_vcpu(i, vcpu, kvm) {
1593 if (mpidr == kvm_vcpu_get_mpidr_aff(vcpu))
1594 return vcpu;
1595 }
1596 return NULL;
1597}
1598
1599bool kvm_arch_has_irq_bypass(void)
1600{
1601 return true;
1602}
1603
1604int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
1605 struct irq_bypass_producer *prod)
1606{
1607 struct kvm_kernel_irqfd *irqfd =
1608 container_of(cons, struct kvm_kernel_irqfd, consumer);
1609
1610 return kvm_vgic_v4_set_forwarding(irqfd->kvm, prod->irq,
1611 &irqfd->irq_entry);
1612}
1613void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
1614 struct irq_bypass_producer *prod)
1615{
1616 struct kvm_kernel_irqfd *irqfd =
1617 container_of(cons, struct kvm_kernel_irqfd, consumer);
1618
1619 kvm_vgic_v4_unset_forwarding(irqfd->kvm, prod->irq,
1620 &irqfd->irq_entry);
1621}
1622
1623void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *cons)
1624{
1625 struct kvm_kernel_irqfd *irqfd =
1626 container_of(cons, struct kvm_kernel_irqfd, consumer);
1627
1628 kvm_arm_halt_guest(irqfd->kvm);
1629}
1630
1631void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *cons)
1632{
1633 struct kvm_kernel_irqfd *irqfd =
1634 container_of(cons, struct kvm_kernel_irqfd, consumer);
1635
1636 kvm_arm_resume_guest(irqfd->kvm);
1637}
1638
1639
1640
1641
1642int kvm_arch_init(void *opaque)
1643{
1644 int err;
1645 int ret, cpu;
1646 bool in_hyp_mode;
1647
1648 if (!is_hyp_mode_available()) {
1649 kvm_info("HYP mode not available\n");
1650 return -ENODEV;
1651 }
1652
1653 in_hyp_mode = is_kernel_in_hyp_mode();
1654
1655 if (!in_hyp_mode && kvm_arch_requires_vhe()) {
1656 kvm_pr_unimpl("CPU unsupported in non-VHE mode, not initializing\n");
1657 return -ENODEV;
1658 }
1659
1660 for_each_online_cpu(cpu) {
1661 smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1);
1662 if (ret < 0) {
1663 kvm_err("Error, CPU %d not supported!\n", cpu);
1664 return -ENODEV;
1665 }
1666 }
1667
1668 err = init_common_resources();
1669 if (err)
1670 return err;
1671
1672 err = kvm_arm_init_sve();
1673 if (err)
1674 return err;
1675
1676 if (!in_hyp_mode) {
1677 err = init_hyp_mode();
1678 if (err)
1679 goto out_err;
1680 }
1681
1682 err = init_subsystems();
1683 if (err)
1684 goto out_hyp;
1685
1686 if (in_hyp_mode)
1687 kvm_info("VHE mode initialized successfully\n");
1688 else
1689 kvm_info("Hyp mode initialized successfully\n");
1690
1691 return 0;
1692
1693out_hyp:
1694 hyp_cpu_pm_exit();
1695 if (!in_hyp_mode)
1696 teardown_hyp_mode();
1697out_err:
1698 return err;
1699}
1700
1701
1702void kvm_arch_exit(void)
1703{
1704 kvm_perf_teardown();
1705}
1706
1707static int arm_init(void)
1708{
1709 int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
1710 return rc;
1711}
1712
1713module_init(arm_init);
1714