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21#include <linux/errno.h>
22#include <linux/err.h>
23#include <linux/kvm_host.h>
24#include <linux/vmalloc.h>
25#include <linux/hrtimer.h>
26#include <linux/fs.h>
27#include <linux/slab.h>
28#include <linux/file.h>
29#include <linux/module.h>
30#include <asm/cputable.h>
31#include <asm/uaccess.h>
32#include <asm/kvm_ppc.h>
33#include <asm/tlbflush.h>
34#include <asm/cputhreads.h>
35#include <asm/irqflags.h>
36#include "timing.h"
37#include "irq.h"
38#include "../mm/mmu_decl.h"
39
40#define CREATE_TRACE_POINTS
41#include "trace.h"
42
43struct kvmppc_ops *kvmppc_hv_ops;
44EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
45struct kvmppc_ops *kvmppc_pr_ops;
46EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
47
48
49int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
50{
51 return !!(v->arch.pending_exceptions) ||
52 v->requests;
53}
54
55int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
56{
57 return 1;
58}
59
60
61
62
63
64
65
66
67
68
69int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
70{
71 int r;
72
73 WARN_ON(irqs_disabled());
74 hard_irq_disable();
75
76 while (true) {
77 if (need_resched()) {
78 local_irq_enable();
79 cond_resched();
80 hard_irq_disable();
81 continue;
82 }
83
84 if (signal_pending(current)) {
85 kvmppc_account_exit(vcpu, SIGNAL_EXITS);
86 vcpu->run->exit_reason = KVM_EXIT_INTR;
87 r = -EINTR;
88 break;
89 }
90
91 vcpu->mode = IN_GUEST_MODE;
92
93
94
95
96
97
98
99 smp_mb();
100
101 if (vcpu->requests) {
102
103 local_irq_enable();
104 trace_kvm_check_requests(vcpu);
105 r = kvmppc_core_check_requests(vcpu);
106 hard_irq_disable();
107 if (r > 0)
108 continue;
109 break;
110 }
111
112 if (kvmppc_core_prepare_to_enter(vcpu)) {
113
114
115 continue;
116 }
117
118 kvm_guest_enter();
119 return 1;
120 }
121
122
123 local_irq_enable();
124 return r;
125}
126EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
127
128#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
129static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
130{
131 struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
132 int i;
133
134 shared->sprg0 = swab64(shared->sprg0);
135 shared->sprg1 = swab64(shared->sprg1);
136 shared->sprg2 = swab64(shared->sprg2);
137 shared->sprg3 = swab64(shared->sprg3);
138 shared->srr0 = swab64(shared->srr0);
139 shared->srr1 = swab64(shared->srr1);
140 shared->dar = swab64(shared->dar);
141 shared->msr = swab64(shared->msr);
142 shared->dsisr = swab32(shared->dsisr);
143 shared->int_pending = swab32(shared->int_pending);
144 for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
145 shared->sr[i] = swab32(shared->sr[i]);
146}
147#endif
148
149int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
150{
151 int nr = kvmppc_get_gpr(vcpu, 11);
152 int r;
153 unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
154 unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
155 unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
156 unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
157 unsigned long r2 = 0;
158
159 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
160
161 param1 &= 0xffffffff;
162 param2 &= 0xffffffff;
163 param3 &= 0xffffffff;
164 param4 &= 0xffffffff;
165 }
166
167 switch (nr) {
168 case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
169 {
170#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
171
172 int shared_big_endian = true;
173 if (vcpu->arch.intr_msr & MSR_LE)
174 shared_big_endian = false;
175 if (shared_big_endian != vcpu->arch.shared_big_endian)
176 kvmppc_swab_shared(vcpu);
177 vcpu->arch.shared_big_endian = shared_big_endian;
178#endif
179
180 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
181
182
183
184
185
186 vcpu->arch.disable_kernel_nx = true;
187 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
188 }
189
190 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
191 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
192
193#ifdef CONFIG_PPC_64K_PAGES
194
195
196
197
198 if ((vcpu->arch.magic_page_pa & 0xf000) !=
199 ((ulong)vcpu->arch.shared & 0xf000)) {
200 void *old_shared = vcpu->arch.shared;
201 ulong shared = (ulong)vcpu->arch.shared;
202 void *new_shared;
203
204 shared &= PAGE_MASK;
205 shared |= vcpu->arch.magic_page_pa & 0xf000;
206 new_shared = (void*)shared;
207 memcpy(new_shared, old_shared, 0x1000);
208 vcpu->arch.shared = new_shared;
209 }
210#endif
211
212 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
213
214 r = EV_SUCCESS;
215 break;
216 }
217 case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
218 r = EV_SUCCESS;
219#if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
220 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
221#endif
222
223
224 break;
225 case EV_HCALL_TOKEN(EV_IDLE):
226 r = EV_SUCCESS;
227 kvm_vcpu_block(vcpu);
228 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
229 break;
230 default:
231 r = EV_UNIMPLEMENTED;
232 break;
233 }
234
235 kvmppc_set_gpr(vcpu, 4, r2);
236
237 return r;
238}
239EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
240
241int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
242{
243 int r = false;
244
245
246 if (!vcpu->arch.pvr)
247 goto out;
248
249
250 if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
251 goto out;
252
253
254 if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
255 goto out;
256
257#ifdef CONFIG_KVM_BOOKE_HV
258 if (!cpu_has_feature(CPU_FTR_EMB_HV))
259 goto out;
260#endif
261
262 r = true;
263
264out:
265 vcpu->arch.sane = r;
266 return r ? 0 : -EINVAL;
267}
268EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
269
270int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
271{
272 enum emulation_result er;
273 int r;
274
275 er = kvmppc_emulate_loadstore(vcpu);
276 switch (er) {
277 case EMULATE_DONE:
278
279
280 r = RESUME_GUEST_NV;
281 break;
282 case EMULATE_AGAIN:
283 r = RESUME_GUEST;
284 break;
285 case EMULATE_DO_MMIO:
286 run->exit_reason = KVM_EXIT_MMIO;
287
288
289
290
291 r = RESUME_HOST_NV;
292 break;
293 case EMULATE_FAIL:
294 {
295 u32 last_inst;
296
297 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
298
299 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
300 r = RESUME_HOST;
301 break;
302 }
303 default:
304 WARN_ON(1);
305 r = RESUME_GUEST;
306 }
307
308 return r;
309}
310EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
311
312int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
313 bool data)
314{
315 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
316 struct kvmppc_pte pte;
317 int r;
318
319 vcpu->stat.st++;
320
321 r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
322 XLATE_WRITE, &pte);
323 if (r < 0)
324 return r;
325
326 *eaddr = pte.raddr;
327
328 if (!pte.may_write)
329 return -EPERM;
330
331
332 if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
333 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
334 !(kvmppc_get_msr(vcpu) & MSR_PR)) {
335 void *magic = vcpu->arch.shared;
336 magic += pte.eaddr & 0xfff;
337 memcpy(magic, ptr, size);
338 return EMULATE_DONE;
339 }
340
341 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
342 return EMULATE_DO_MMIO;
343
344 return EMULATE_DONE;
345}
346EXPORT_SYMBOL_GPL(kvmppc_st);
347
348int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
349 bool data)
350{
351 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
352 struct kvmppc_pte pte;
353 int rc;
354
355 vcpu->stat.ld++;
356
357 rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
358 XLATE_READ, &pte);
359 if (rc)
360 return rc;
361
362 *eaddr = pte.raddr;
363
364 if (!pte.may_read)
365 return -EPERM;
366
367 if (!data && !pte.may_execute)
368 return -ENOEXEC;
369
370
371 if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
372 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
373 !(kvmppc_get_msr(vcpu) & MSR_PR)) {
374 void *magic = vcpu->arch.shared;
375 magic += pte.eaddr & 0xfff;
376 memcpy(ptr, magic, size);
377 return EMULATE_DONE;
378 }
379
380 if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
381 return EMULATE_DO_MMIO;
382
383 return EMULATE_DONE;
384}
385EXPORT_SYMBOL_GPL(kvmppc_ld);
386
387int kvm_arch_hardware_enable(void)
388{
389 return 0;
390}
391
392int kvm_arch_hardware_setup(void)
393{
394 return 0;
395}
396
397void kvm_arch_check_processor_compat(void *rtn)
398{
399 *(int *)rtn = kvmppc_core_check_processor_compat();
400}
401
402int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
403{
404 struct kvmppc_ops *kvm_ops = NULL;
405
406
407
408 if (type == 0) {
409 if (kvmppc_hv_ops)
410 kvm_ops = kvmppc_hv_ops;
411 else
412 kvm_ops = kvmppc_pr_ops;
413 if (!kvm_ops)
414 goto err_out;
415 } else if (type == KVM_VM_PPC_HV) {
416 if (!kvmppc_hv_ops)
417 goto err_out;
418 kvm_ops = kvmppc_hv_ops;
419 } else if (type == KVM_VM_PPC_PR) {
420 if (!kvmppc_pr_ops)
421 goto err_out;
422 kvm_ops = kvmppc_pr_ops;
423 } else
424 goto err_out;
425
426 if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
427 return -ENOENT;
428
429 kvm->arch.kvm_ops = kvm_ops;
430 return kvmppc_core_init_vm(kvm);
431err_out:
432 return -EINVAL;
433}
434
435void kvm_arch_destroy_vm(struct kvm *kvm)
436{
437 unsigned int i;
438 struct kvm_vcpu *vcpu;
439
440 kvm_for_each_vcpu(i, vcpu, kvm)
441 kvm_arch_vcpu_free(vcpu);
442
443 mutex_lock(&kvm->lock);
444 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
445 kvm->vcpus[i] = NULL;
446
447 atomic_set(&kvm->online_vcpus, 0);
448
449 kvmppc_core_destroy_vm(kvm);
450
451 mutex_unlock(&kvm->lock);
452
453
454 module_put(kvm->arch.kvm_ops->owner);
455}
456
457int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
458{
459 int r;
460
461 int hv_enabled = kvmppc_hv_ops ? 1 : 0;
462
463 if (kvm) {
464
465
466
467
468 hv_enabled = is_kvmppc_hv_enabled(kvm);
469 }
470
471 switch (ext) {
472#ifdef CONFIG_BOOKE
473 case KVM_CAP_PPC_BOOKE_SREGS:
474 case KVM_CAP_PPC_BOOKE_WATCHDOG:
475 case KVM_CAP_PPC_EPR:
476#else
477 case KVM_CAP_PPC_SEGSTATE:
478 case KVM_CAP_PPC_HIOR:
479 case KVM_CAP_PPC_PAPR:
480#endif
481 case KVM_CAP_PPC_UNSET_IRQ:
482 case KVM_CAP_PPC_IRQ_LEVEL:
483 case KVM_CAP_ENABLE_CAP:
484 case KVM_CAP_ENABLE_CAP_VM:
485 case KVM_CAP_ONE_REG:
486 case KVM_CAP_IOEVENTFD:
487 case KVM_CAP_DEVICE_CTRL:
488 r = 1;
489 break;
490 case KVM_CAP_PPC_PAIRED_SINGLES:
491 case KVM_CAP_PPC_OSI:
492 case KVM_CAP_PPC_GET_PVINFO:
493#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
494 case KVM_CAP_SW_TLB:
495#endif
496
497 r = !hv_enabled;
498 break;
499#ifdef CONFIG_KVM_MMIO
500 case KVM_CAP_COALESCED_MMIO:
501 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
502 break;
503#endif
504#ifdef CONFIG_KVM_MPIC
505 case KVM_CAP_IRQ_MPIC:
506 r = 1;
507 break;
508#endif
509
510#ifdef CONFIG_PPC_BOOK3S_64
511 case KVM_CAP_SPAPR_TCE:
512 case KVM_CAP_PPC_ALLOC_HTAB:
513 case KVM_CAP_PPC_RTAS:
514 case KVM_CAP_PPC_FIXUP_HCALL:
515 case KVM_CAP_PPC_ENABLE_HCALL:
516#ifdef CONFIG_KVM_XICS
517 case KVM_CAP_IRQ_XICS:
518#endif
519 r = 1;
520 break;
521#endif
522#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
523 case KVM_CAP_PPC_SMT:
524 if (hv_enabled)
525 r = threads_per_subcore;
526 else
527 r = 0;
528 break;
529 case KVM_CAP_PPC_RMA:
530 r = 0;
531 break;
532#endif
533 case KVM_CAP_SYNC_MMU:
534#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
535 r = hv_enabled;
536#elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
537 r = 1;
538#else
539 r = 0;
540#endif
541 break;
542#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
543 case KVM_CAP_PPC_HTAB_FD:
544 r = hv_enabled;
545 break;
546#endif
547 case KVM_CAP_NR_VCPUS:
548
549
550
551
552
553
554 if (hv_enabled)
555 r = num_present_cpus();
556 else
557 r = num_online_cpus();
558 break;
559 case KVM_CAP_MAX_VCPUS:
560 r = KVM_MAX_VCPUS;
561 break;
562#ifdef CONFIG_PPC_BOOK3S_64
563 case KVM_CAP_PPC_GET_SMMU_INFO:
564 r = 1;
565 break;
566#endif
567 default:
568 r = 0;
569 break;
570 }
571 return r;
572
573}
574
575long kvm_arch_dev_ioctl(struct file *filp,
576 unsigned int ioctl, unsigned long arg)
577{
578 return -EINVAL;
579}
580
581void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
582 struct kvm_memory_slot *dont)
583{
584 kvmppc_core_free_memslot(kvm, free, dont);
585}
586
587int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
588 unsigned long npages)
589{
590 return kvmppc_core_create_memslot(kvm, slot, npages);
591}
592
593int kvm_arch_prepare_memory_region(struct kvm *kvm,
594 struct kvm_memory_slot *memslot,
595 struct kvm_userspace_memory_region *mem,
596 enum kvm_mr_change change)
597{
598 return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
599}
600
601void kvm_arch_commit_memory_region(struct kvm *kvm,
602 struct kvm_userspace_memory_region *mem,
603 const struct kvm_memory_slot *old,
604 enum kvm_mr_change change)
605{
606 kvmppc_core_commit_memory_region(kvm, mem, old);
607}
608
609void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
610 struct kvm_memory_slot *slot)
611{
612 kvmppc_core_flush_memslot(kvm, slot);
613}
614
615struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
616{
617 struct kvm_vcpu *vcpu;
618 vcpu = kvmppc_core_vcpu_create(kvm, id);
619 if (!IS_ERR(vcpu)) {
620 vcpu->arch.wqp = &vcpu->wq;
621 kvmppc_create_vcpu_debugfs(vcpu, id);
622 }
623 return vcpu;
624}
625
626void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
627{
628}
629
630void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
631{
632
633 hrtimer_cancel(&vcpu->arch.dec_timer);
634
635 kvmppc_remove_vcpu_debugfs(vcpu);
636
637 switch (vcpu->arch.irq_type) {
638 case KVMPPC_IRQ_MPIC:
639 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
640 break;
641 case KVMPPC_IRQ_XICS:
642 kvmppc_xics_free_icp(vcpu);
643 break;
644 }
645
646 kvmppc_core_vcpu_free(vcpu);
647}
648
649void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
650{
651 kvm_arch_vcpu_free(vcpu);
652}
653
654int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
655{
656 return kvmppc_core_pending_dec(vcpu);
657}
658
659enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
660{
661 struct kvm_vcpu *vcpu;
662
663 vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
664 kvmppc_decrementer_func(vcpu);
665
666 return HRTIMER_NORESTART;
667}
668
669int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
670{
671 int ret;
672
673 hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
674 vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
675 vcpu->arch.dec_expires = ~(u64)0;
676
677#ifdef CONFIG_KVM_EXIT_TIMING
678 mutex_init(&vcpu->arch.exit_timing_lock);
679#endif
680 ret = kvmppc_subarch_vcpu_init(vcpu);
681 return ret;
682}
683
684void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
685{
686 kvmppc_mmu_destroy(vcpu);
687 kvmppc_subarch_vcpu_uninit(vcpu);
688}
689
690void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
691{
692#ifdef CONFIG_BOOKE
693
694
695
696
697
698
699
700 mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
701#endif
702 kvmppc_core_vcpu_load(vcpu, cpu);
703}
704
705void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
706{
707 kvmppc_core_vcpu_put(vcpu);
708#ifdef CONFIG_BOOKE
709 vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
710#endif
711}
712
713static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
714 struct kvm_run *run)
715{
716 u64 uninitialized_var(gpr);
717
718 if (run->mmio.len > sizeof(gpr)) {
719 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
720 return;
721 }
722
723 if (vcpu->arch.mmio_is_bigendian) {
724 switch (run->mmio.len) {
725 case 8: gpr = *(u64 *)run->mmio.data; break;
726 case 4: gpr = *(u32 *)run->mmio.data; break;
727 case 2: gpr = *(u16 *)run->mmio.data; break;
728 case 1: gpr = *(u8 *)run->mmio.data; break;
729 }
730 } else {
731
732 switch (run->mmio.len) {
733 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
734 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
735 case 1: gpr = *(u8 *)run->mmio.data; break;
736 }
737 }
738
739 if (vcpu->arch.mmio_sign_extend) {
740 switch (run->mmio.len) {
741#ifdef CONFIG_PPC64
742 case 4:
743 gpr = (s64)(s32)gpr;
744 break;
745#endif
746 case 2:
747 gpr = (s64)(s16)gpr;
748 break;
749 case 1:
750 gpr = (s64)(s8)gpr;
751 break;
752 }
753 }
754
755 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
756
757 switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
758 case KVM_MMIO_REG_GPR:
759 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
760 break;
761 case KVM_MMIO_REG_FPR:
762 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
763 break;
764#ifdef CONFIG_PPC_BOOK3S
765 case KVM_MMIO_REG_QPR:
766 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
767 break;
768 case KVM_MMIO_REG_FQPR:
769 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
770 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
771 break;
772#endif
773 default:
774 BUG();
775 }
776}
777
778int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
779 unsigned int rt, unsigned int bytes,
780 int is_default_endian)
781{
782 int idx, ret;
783 int is_bigendian;
784
785 if (kvmppc_need_byteswap(vcpu)) {
786
787 is_bigendian = !is_default_endian;
788 } else {
789
790 is_bigendian = is_default_endian;
791 }
792
793 if (bytes > sizeof(run->mmio.data)) {
794 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
795 run->mmio.len);
796 }
797
798 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
799 run->mmio.len = bytes;
800 run->mmio.is_write = 0;
801
802 vcpu->arch.io_gpr = rt;
803 vcpu->arch.mmio_is_bigendian = is_bigendian;
804 vcpu->mmio_needed = 1;
805 vcpu->mmio_is_write = 0;
806 vcpu->arch.mmio_sign_extend = 0;
807
808 idx = srcu_read_lock(&vcpu->kvm->srcu);
809
810 ret = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
811 bytes, &run->mmio.data);
812
813 srcu_read_unlock(&vcpu->kvm->srcu, idx);
814
815 if (!ret) {
816 kvmppc_complete_mmio_load(vcpu, run);
817 vcpu->mmio_needed = 0;
818 return EMULATE_DONE;
819 }
820
821 return EMULATE_DO_MMIO;
822}
823EXPORT_SYMBOL_GPL(kvmppc_handle_load);
824
825
826int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
827 unsigned int rt, unsigned int bytes,
828 int is_default_endian)
829{
830 int r;
831
832 vcpu->arch.mmio_sign_extend = 1;
833 r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
834
835 return r;
836}
837
838int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
839 u64 val, unsigned int bytes, int is_default_endian)
840{
841 void *data = run->mmio.data;
842 int idx, ret;
843 int is_bigendian;
844
845 if (kvmppc_need_byteswap(vcpu)) {
846
847 is_bigendian = !is_default_endian;
848 } else {
849
850 is_bigendian = is_default_endian;
851 }
852
853 if (bytes > sizeof(run->mmio.data)) {
854 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
855 run->mmio.len);
856 }
857
858 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
859 run->mmio.len = bytes;
860 run->mmio.is_write = 1;
861 vcpu->mmio_needed = 1;
862 vcpu->mmio_is_write = 1;
863
864
865 if (is_bigendian) {
866 switch (bytes) {
867 case 8: *(u64 *)data = val; break;
868 case 4: *(u32 *)data = val; break;
869 case 2: *(u16 *)data = val; break;
870 case 1: *(u8 *)data = val; break;
871 }
872 } else {
873
874 switch (bytes) {
875 case 4: st_le32(data, val); break;
876 case 2: st_le16(data, val); break;
877 case 1: *(u8 *)data = val; break;
878 }
879 }
880
881 idx = srcu_read_lock(&vcpu->kvm->srcu);
882
883 ret = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
884 bytes, &run->mmio.data);
885
886 srcu_read_unlock(&vcpu->kvm->srcu, idx);
887
888 if (!ret) {
889 vcpu->mmio_needed = 0;
890 return EMULATE_DONE;
891 }
892
893 return EMULATE_DO_MMIO;
894}
895EXPORT_SYMBOL_GPL(kvmppc_handle_store);
896
897int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
898{
899 int r = 0;
900 union kvmppc_one_reg val;
901 int size;
902
903 size = one_reg_size(reg->id);
904 if (size > sizeof(val))
905 return -EINVAL;
906
907 r = kvmppc_get_one_reg(vcpu, reg->id, &val);
908 if (r == -EINVAL) {
909 r = 0;
910 switch (reg->id) {
911#ifdef CONFIG_ALTIVEC
912 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
913 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
914 r = -ENXIO;
915 break;
916 }
917 vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
918 break;
919 case KVM_REG_PPC_VSCR:
920 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
921 r = -ENXIO;
922 break;
923 }
924 vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
925 break;
926 case KVM_REG_PPC_VRSAVE:
927 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
928 r = -ENXIO;
929 break;
930 }
931 vcpu->arch.vrsave = set_reg_val(reg->id, val);
932 break;
933#endif
934 default:
935 r = -EINVAL;
936 break;
937 }
938 }
939
940 if (r)
941 return r;
942
943 if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
944 r = -EFAULT;
945
946 return r;
947}
948
949int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
950{
951 int r;
952 union kvmppc_one_reg val;
953 int size;
954
955 size = one_reg_size(reg->id);
956 if (size > sizeof(val))
957 return -EINVAL;
958
959 if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
960 return -EFAULT;
961
962 r = kvmppc_set_one_reg(vcpu, reg->id, &val);
963 if (r == -EINVAL) {
964 r = 0;
965 switch (reg->id) {
966#ifdef CONFIG_ALTIVEC
967 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
968 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
969 r = -ENXIO;
970 break;
971 }
972 val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
973 break;
974 case KVM_REG_PPC_VSCR:
975 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
976 r = -ENXIO;
977 break;
978 }
979 val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
980 break;
981 case KVM_REG_PPC_VRSAVE:
982 val = get_reg_val(reg->id, vcpu->arch.vrsave);
983 break;
984#endif
985 default:
986 r = -EINVAL;
987 break;
988 }
989 }
990
991 return r;
992}
993
994int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
995{
996 int r;
997 sigset_t sigsaved;
998
999 if (vcpu->sigset_active)
1000 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
1001
1002 if (vcpu->mmio_needed) {
1003 if (!vcpu->mmio_is_write)
1004 kvmppc_complete_mmio_load(vcpu, run);
1005 vcpu->mmio_needed = 0;
1006 } else if (vcpu->arch.osi_needed) {
1007 u64 *gprs = run->osi.gprs;
1008 int i;
1009
1010 for (i = 0; i < 32; i++)
1011 kvmppc_set_gpr(vcpu, i, gprs[i]);
1012 vcpu->arch.osi_needed = 0;
1013 } else if (vcpu->arch.hcall_needed) {
1014 int i;
1015
1016 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1017 for (i = 0; i < 9; ++i)
1018 kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1019 vcpu->arch.hcall_needed = 0;
1020#ifdef CONFIG_BOOKE
1021 } else if (vcpu->arch.epr_needed) {
1022 kvmppc_set_epr(vcpu, run->epr.epr);
1023 vcpu->arch.epr_needed = 0;
1024#endif
1025 }
1026
1027 r = kvmppc_vcpu_run(run, vcpu);
1028
1029 if (vcpu->sigset_active)
1030 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1031
1032 return r;
1033}
1034
1035int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1036{
1037 if (irq->irq == KVM_INTERRUPT_UNSET) {
1038 kvmppc_core_dequeue_external(vcpu);
1039 return 0;
1040 }
1041
1042 kvmppc_core_queue_external(vcpu, irq);
1043
1044 kvm_vcpu_kick(vcpu);
1045
1046 return 0;
1047}
1048
1049static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1050 struct kvm_enable_cap *cap)
1051{
1052 int r;
1053
1054 if (cap->flags)
1055 return -EINVAL;
1056
1057 switch (cap->cap) {
1058 case KVM_CAP_PPC_OSI:
1059 r = 0;
1060 vcpu->arch.osi_enabled = true;
1061 break;
1062 case KVM_CAP_PPC_PAPR:
1063 r = 0;
1064 vcpu->arch.papr_enabled = true;
1065 break;
1066 case KVM_CAP_PPC_EPR:
1067 r = 0;
1068 if (cap->args[0])
1069 vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1070 else
1071 vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1072 break;
1073#ifdef CONFIG_BOOKE
1074 case KVM_CAP_PPC_BOOKE_WATCHDOG:
1075 r = 0;
1076 vcpu->arch.watchdog_enabled = true;
1077 break;
1078#endif
1079#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1080 case KVM_CAP_SW_TLB: {
1081 struct kvm_config_tlb cfg;
1082 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1083
1084 r = -EFAULT;
1085 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1086 break;
1087
1088 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1089 break;
1090 }
1091#endif
1092#ifdef CONFIG_KVM_MPIC
1093 case KVM_CAP_IRQ_MPIC: {
1094 struct fd f;
1095 struct kvm_device *dev;
1096
1097 r = -EBADF;
1098 f = fdget(cap->args[0]);
1099 if (!f.file)
1100 break;
1101
1102 r = -EPERM;
1103 dev = kvm_device_from_filp(f.file);
1104 if (dev)
1105 r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1106
1107 fdput(f);
1108 break;
1109 }
1110#endif
1111#ifdef CONFIG_KVM_XICS
1112 case KVM_CAP_IRQ_XICS: {
1113 struct fd f;
1114 struct kvm_device *dev;
1115
1116 r = -EBADF;
1117 f = fdget(cap->args[0]);
1118 if (!f.file)
1119 break;
1120
1121 r = -EPERM;
1122 dev = kvm_device_from_filp(f.file);
1123 if (dev)
1124 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1125
1126 fdput(f);
1127 break;
1128 }
1129#endif
1130 default:
1131 r = -EINVAL;
1132 break;
1133 }
1134
1135 if (!r)
1136 r = kvmppc_sanity_check(vcpu);
1137
1138 return r;
1139}
1140
1141int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1142 struct kvm_mp_state *mp_state)
1143{
1144 return -EINVAL;
1145}
1146
1147int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1148 struct kvm_mp_state *mp_state)
1149{
1150 return -EINVAL;
1151}
1152
1153long kvm_arch_vcpu_ioctl(struct file *filp,
1154 unsigned int ioctl, unsigned long arg)
1155{
1156 struct kvm_vcpu *vcpu = filp->private_data;
1157 void __user *argp = (void __user *)arg;
1158 long r;
1159
1160 switch (ioctl) {
1161 case KVM_INTERRUPT: {
1162 struct kvm_interrupt irq;
1163 r = -EFAULT;
1164 if (copy_from_user(&irq, argp, sizeof(irq)))
1165 goto out;
1166 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1167 goto out;
1168 }
1169
1170 case KVM_ENABLE_CAP:
1171 {
1172 struct kvm_enable_cap cap;
1173 r = -EFAULT;
1174 if (copy_from_user(&cap, argp, sizeof(cap)))
1175 goto out;
1176 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1177 break;
1178 }
1179
1180 case KVM_SET_ONE_REG:
1181 case KVM_GET_ONE_REG:
1182 {
1183 struct kvm_one_reg reg;
1184 r = -EFAULT;
1185 if (copy_from_user(®, argp, sizeof(reg)))
1186 goto out;
1187 if (ioctl == KVM_SET_ONE_REG)
1188 r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®);
1189 else
1190 r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®);
1191 break;
1192 }
1193
1194#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1195 case KVM_DIRTY_TLB: {
1196 struct kvm_dirty_tlb dirty;
1197 r = -EFAULT;
1198 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1199 goto out;
1200 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1201 break;
1202 }
1203#endif
1204 default:
1205 r = -EINVAL;
1206 }
1207
1208out:
1209 return r;
1210}
1211
1212int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1213{
1214 return VM_FAULT_SIGBUS;
1215}
1216
1217static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1218{
1219 u32 inst_nop = 0x60000000;
1220#ifdef CONFIG_KVM_BOOKE_HV
1221 u32 inst_sc1 = 0x44000022;
1222 pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1223 pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1224 pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1225 pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1226#else
1227 u32 inst_lis = 0x3c000000;
1228 u32 inst_ori = 0x60000000;
1229 u32 inst_sc = 0x44000002;
1230 u32 inst_imm_mask = 0xffff;
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241 pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1242 pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1243 pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1244 pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1245#endif
1246
1247 pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1248
1249 return 0;
1250}
1251
1252int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1253 bool line_status)
1254{
1255 if (!irqchip_in_kernel(kvm))
1256 return -ENXIO;
1257
1258 irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1259 irq_event->irq, irq_event->level,
1260 line_status);
1261 return 0;
1262}
1263
1264
1265static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1266 struct kvm_enable_cap *cap)
1267{
1268 int r;
1269
1270 if (cap->flags)
1271 return -EINVAL;
1272
1273 switch (cap->cap) {
1274#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1275 case KVM_CAP_PPC_ENABLE_HCALL: {
1276 unsigned long hcall = cap->args[0];
1277
1278 r = -EINVAL;
1279 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1280 cap->args[1] > 1)
1281 break;
1282 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1283 break;
1284 if (cap->args[1])
1285 set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1286 else
1287 clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1288 r = 0;
1289 break;
1290 }
1291#endif
1292 default:
1293 r = -EINVAL;
1294 break;
1295 }
1296
1297 return r;
1298}
1299
1300long kvm_arch_vm_ioctl(struct file *filp,
1301 unsigned int ioctl, unsigned long arg)
1302{
1303 struct kvm *kvm __maybe_unused = filp->private_data;
1304 void __user *argp = (void __user *)arg;
1305 long r;
1306
1307 switch (ioctl) {
1308 case KVM_PPC_GET_PVINFO: {
1309 struct kvm_ppc_pvinfo pvinfo;
1310 memset(&pvinfo, 0, sizeof(pvinfo));
1311 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1312 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1313 r = -EFAULT;
1314 goto out;
1315 }
1316
1317 break;
1318 }
1319 case KVM_ENABLE_CAP:
1320 {
1321 struct kvm_enable_cap cap;
1322 r = -EFAULT;
1323 if (copy_from_user(&cap, argp, sizeof(cap)))
1324 goto out;
1325 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1326 break;
1327 }
1328#ifdef CONFIG_PPC_BOOK3S_64
1329 case KVM_CREATE_SPAPR_TCE: {
1330 struct kvm_create_spapr_tce create_tce;
1331
1332 r = -EFAULT;
1333 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1334 goto out;
1335 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
1336 goto out;
1337 }
1338 case KVM_PPC_GET_SMMU_INFO: {
1339 struct kvm_ppc_smmu_info info;
1340 struct kvm *kvm = filp->private_data;
1341
1342 memset(&info, 0, sizeof(info));
1343 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1344 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1345 r = -EFAULT;
1346 break;
1347 }
1348 case KVM_PPC_RTAS_DEFINE_TOKEN: {
1349 struct kvm *kvm = filp->private_data;
1350
1351 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1352 break;
1353 }
1354 default: {
1355 struct kvm *kvm = filp->private_data;
1356 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1357 }
1358#else
1359 default:
1360 r = -ENOTTY;
1361#endif
1362 }
1363out:
1364 return r;
1365}
1366
1367static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1368static unsigned long nr_lpids;
1369
1370long kvmppc_alloc_lpid(void)
1371{
1372 long lpid;
1373
1374 do {
1375 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1376 if (lpid >= nr_lpids) {
1377 pr_err("%s: No LPIDs free\n", __func__);
1378 return -ENOMEM;
1379 }
1380 } while (test_and_set_bit(lpid, lpid_inuse));
1381
1382 return lpid;
1383}
1384EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1385
1386void kvmppc_claim_lpid(long lpid)
1387{
1388 set_bit(lpid, lpid_inuse);
1389}
1390EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1391
1392void kvmppc_free_lpid(long lpid)
1393{
1394 clear_bit(lpid, lpid_inuse);
1395}
1396EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1397
1398void kvmppc_init_lpid(unsigned long nr_lpids_param)
1399{
1400 nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1401 memset(lpid_inuse, 0, sizeof(lpid_inuse));
1402}
1403EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1404
1405int kvm_arch_init(void *opaque)
1406{
1407 return 0;
1408}
1409
1410EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);
1411
