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Linux 4.6-rc6
[linux/fpc-iii.git] / arch / powerpc / kvm / powerpc.c
blob6a68730774ee7dd701358cbc6cfce36c37db4009
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
10 *
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
14 *
15 * Copyright IBM Corp. 2007
16 *
17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
18 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
19 */
20
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 <asm/iommu.h>
37 #include "timing.h"
38 #include "irq.h"
39 #include "../mm/mmu_decl.h"
40
41 #define CREATE_TRACE_POINTS
42 #include "trace.h"
43
44 struct kvmppc_ops *kvmppc_hv_ops;
45 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
46 struct kvmppc_ops *kvmppc_pr_ops;
47 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
48
49
50 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
51 {
52 return !!(v->arch.pending_exceptions) ||
53 v->requests;
54 }
55
56 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
57 {
58 return 1;
59 }
60
61 /*
62 * Common checks before entering the guest world. Call with interrupts
63 * disabled.
64 *
65 * returns:
66 *
67 * == 1 if we're ready to go into guest state
68 * <= 0 if we need to go back to the host with return value
69 */
70 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
71 {
72 int r;
73
74 WARN_ON(irqs_disabled());
75 hard_irq_disable();
76
77 while (true) {
78 if (need_resched()) {
79 local_irq_enable();
80 cond_resched();
81 hard_irq_disable();
82 continue;
83 }
84
85 if (signal_pending(current)) {
86 kvmppc_account_exit(vcpu, SIGNAL_EXITS);
87 vcpu->run->exit_reason = KVM_EXIT_INTR;
88 r = -EINTR;
89 break;
90 }
91
92 vcpu->mode = IN_GUEST_MODE;
93
94 /*
95 * Reading vcpu->requests must happen after setting vcpu->mode,
96 * so we don't miss a request because the requester sees
97 * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
98 * before next entering the guest (and thus doesn't IPI).
99 * This also orders the write to mode from any reads
100 * to the page tables done while the VCPU is running.
101 * Please see the comment in kvm_flush_remote_tlbs.
102 */
103 smp_mb();
104
105 if (vcpu->requests) {
106 /* Make sure we process requests preemptable */
107 local_irq_enable();
108 trace_kvm_check_requests(vcpu);
109 r = kvmppc_core_check_requests(vcpu);
110 hard_irq_disable();
111 if (r > 0)
112 continue;
113 break;
114 }
115
116 if (kvmppc_core_prepare_to_enter(vcpu)) {
117 /* interrupts got enabled in between, so we
118 are back at square 1 */
119 continue;
120 }
121
122 __kvm_guest_enter();
123 return 1;
124 }
125
126 /* return to host */
127 local_irq_enable();
128 return r;
129 }
130 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
131
132 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
133 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
134 {
135 struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
136 int i;
137
138 shared->sprg0 = swab64(shared->sprg0);
139 shared->sprg1 = swab64(shared->sprg1);
140 shared->sprg2 = swab64(shared->sprg2);
141 shared->sprg3 = swab64(shared->sprg3);
142 shared->srr0 = swab64(shared->srr0);
143 shared->srr1 = swab64(shared->srr1);
144 shared->dar = swab64(shared->dar);
145 shared->msr = swab64(shared->msr);
146 shared->dsisr = swab32(shared->dsisr);
147 shared->int_pending = swab32(shared->int_pending);
148 for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
149 shared->sr[i] = swab32(shared->sr[i]);
150 }
151 #endif
152
153 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
154 {
155 int nr = kvmppc_get_gpr(vcpu, 11);
156 int r;
157 unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
158 unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
159 unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
160 unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
161 unsigned long r2 = 0;
162
163 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
164 /* 32 bit mode */
165 param1 &= 0xffffffff;
166 param2 &= 0xffffffff;
167 param3 &= 0xffffffff;
168 param4 &= 0xffffffff;
169 }
170
171 switch (nr) {
172 case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
173 {
174 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
175 /* Book3S can be little endian, find it out here */
176 int shared_big_endian = true;
177 if (vcpu->arch.intr_msr & MSR_LE)
178 shared_big_endian = false;
179 if (shared_big_endian != vcpu->arch.shared_big_endian)
180 kvmppc_swab_shared(vcpu);
181 vcpu->arch.shared_big_endian = shared_big_endian;
182 #endif
183
184 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
185 /*
186 * Older versions of the Linux magic page code had
187 * a bug where they would map their trampoline code
188 * NX. If that's the case, remove !PR NX capability.
189 */
190 vcpu->arch.disable_kernel_nx = true;
191 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
192 }
193
194 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
195 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
196
197 #ifdef CONFIG_PPC_64K_PAGES
198 /*
199 * Make sure our 4k magic page is in the same window of a 64k
200 * page within the guest and within the host's page.
201 */
202 if ((vcpu->arch.magic_page_pa & 0xf000) !=
203 ((ulong)vcpu->arch.shared & 0xf000)) {
204 void *old_shared = vcpu->arch.shared;
205 ulong shared = (ulong)vcpu->arch.shared;
206 void *new_shared;
207
208 shared &= PAGE_MASK;
209 shared |= vcpu->arch.magic_page_pa & 0xf000;
210 new_shared = (void*)shared;
211 memcpy(new_shared, old_shared, 0x1000);
212 vcpu->arch.shared = new_shared;
213 }
214 #endif
215
216 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
217
218 r = EV_SUCCESS;
219 break;
220 }
221 case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
222 r = EV_SUCCESS;
223 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
224 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
225 #endif
226
227 /* Second return value is in r4 */
228 break;
229 case EV_HCALL_TOKEN(EV_IDLE):
230 r = EV_SUCCESS;
231 kvm_vcpu_block(vcpu);
232 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
233 break;
234 default:
235 r = EV_UNIMPLEMENTED;
236 break;
237 }
238
239 kvmppc_set_gpr(vcpu, 4, r2);
240
241 return r;
242 }
243 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
244
245 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
246 {
247 int r = false;
248
249 /* We have to know what CPU to virtualize */
250 if (!vcpu->arch.pvr)
251 goto out;
252
253 /* PAPR only works with book3s_64 */
254 if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
255 goto out;
256
257 /* HV KVM can only do PAPR mode for now */
258 if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
259 goto out;
260
261 #ifdef CONFIG_KVM_BOOKE_HV
262 if (!cpu_has_feature(CPU_FTR_EMB_HV))
263 goto out;
264 #endif
265
266 r = true;
267
268 out:
269 vcpu->arch.sane = r;
270 return r ? 0 : -EINVAL;
271 }
272 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
273
274 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
275 {
276 enum emulation_result er;
277 int r;
278
279 er = kvmppc_emulate_loadstore(vcpu);
280 switch (er) {
281 case EMULATE_DONE:
282 /* Future optimization: only reload non-volatiles if they were
283 * actually modified. */
284 r = RESUME_GUEST_NV;
285 break;
286 case EMULATE_AGAIN:
287 r = RESUME_GUEST;
288 break;
289 case EMULATE_DO_MMIO:
290 run->exit_reason = KVM_EXIT_MMIO;
291 /* We must reload nonvolatiles because "update" load/store
292 * instructions modify register state. */
293 /* Future optimization: only reload non-volatiles if they were
294 * actually modified. */
295 r = RESUME_HOST_NV;
296 break;
297 case EMULATE_FAIL:
298 {
299 u32 last_inst;
300
301 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
302 /* XXX Deliver Program interrupt to guest. */
303 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
304 r = RESUME_HOST;
305 break;
306 }
307 default:
308 WARN_ON(1);
309 r = RESUME_GUEST;
310 }
311
312 return r;
313 }
314 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
315
316 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
317 bool data)
318 {
319 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
320 struct kvmppc_pte pte;
321 int r;
322
323 vcpu->stat.st++;
324
325 r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
326 XLATE_WRITE, &pte);
327 if (r < 0)
328 return r;
329
330 *eaddr = pte.raddr;
331
332 if (!pte.may_write)
333 return -EPERM;
334
335 /* Magic page override */
336 if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
337 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
338 !(kvmppc_get_msr(vcpu) & MSR_PR)) {
339 void *magic = vcpu->arch.shared;
340 magic += pte.eaddr & 0xfff;
341 memcpy(magic, ptr, size);
342 return EMULATE_DONE;
343 }
344
345 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
346 return EMULATE_DO_MMIO;
347
348 return EMULATE_DONE;
349 }
350 EXPORT_SYMBOL_GPL(kvmppc_st);
351
352 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
353 bool data)
354 {
355 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
356 struct kvmppc_pte pte;
357 int rc;
358
359 vcpu->stat.ld++;
360
361 rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
362 XLATE_READ, &pte);
363 if (rc)
364 return rc;
365
366 *eaddr = pte.raddr;
367
368 if (!pte.may_read)
369 return -EPERM;
370
371 if (!data && !pte.may_execute)
372 return -ENOEXEC;
373
374 /* Magic page override */
375 if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
376 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
377 !(kvmppc_get_msr(vcpu) & MSR_PR)) {
378 void *magic = vcpu->arch.shared;
379 magic += pte.eaddr & 0xfff;
380 memcpy(ptr, magic, size);
381 return EMULATE_DONE;
382 }
383
384 if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
385 return EMULATE_DO_MMIO;
386
387 return EMULATE_DONE;
388 }
389 EXPORT_SYMBOL_GPL(kvmppc_ld);
390
391 int kvm_arch_hardware_enable(void)
392 {
393 return 0;
394 }
395
396 int kvm_arch_hardware_setup(void)
397 {
398 return 0;
399 }
400
401 void kvm_arch_check_processor_compat(void *rtn)
402 {
403 *(int *)rtn = kvmppc_core_check_processor_compat();
404 }
405
406 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
407 {
408 struct kvmppc_ops *kvm_ops = NULL;
409 /*
410 * if we have both HV and PR enabled, default is HV
411 */
412 if (type == 0) {
413 if (kvmppc_hv_ops)
414 kvm_ops = kvmppc_hv_ops;
415 else
416 kvm_ops = kvmppc_pr_ops;
417 if (!kvm_ops)
418 goto err_out;
419 } else if (type == KVM_VM_PPC_HV) {
420 if (!kvmppc_hv_ops)
421 goto err_out;
422 kvm_ops = kvmppc_hv_ops;
423 } else if (type == KVM_VM_PPC_PR) {
424 if (!kvmppc_pr_ops)
425 goto err_out;
426 kvm_ops = kvmppc_pr_ops;
427 } else
428 goto err_out;
429
430 if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
431 return -ENOENT;
432
433 kvm->arch.kvm_ops = kvm_ops;
434 return kvmppc_core_init_vm(kvm);
435 err_out:
436 return -EINVAL;
437 }
438
439 void kvm_arch_destroy_vm(struct kvm *kvm)
440 {
441 unsigned int i;
442 struct kvm_vcpu *vcpu;
443
444 #ifdef CONFIG_KVM_XICS
445 /*
446 * We call kick_all_cpus_sync() to ensure that all
447 * CPUs have executed any pending IPIs before we
448 * continue and free VCPUs structures below.
449 */
450 if (is_kvmppc_hv_enabled(kvm))
451 kick_all_cpus_sync();
452 #endif
453
454 kvm_for_each_vcpu(i, vcpu, kvm)
455 kvm_arch_vcpu_free(vcpu);
456
457 mutex_lock(&kvm->lock);
458 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
459 kvm->vcpus[i] = NULL;
460
461 atomic_set(&kvm->online_vcpus, 0);
462
463 kvmppc_core_destroy_vm(kvm);
464
465 mutex_unlock(&kvm->lock);
466
467 /* drop the module reference */
468 module_put(kvm->arch.kvm_ops->owner);
469 }
470
471 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
472 {
473 int r;
474 /* Assume we're using HV mode when the HV module is loaded */
475 int hv_enabled = kvmppc_hv_ops ? 1 : 0;
476
477 if (kvm) {
478 /*
479 * Hooray - we know which VM type we're running on. Depend on
480 * that rather than the guess above.
481 */
482 hv_enabled = is_kvmppc_hv_enabled(kvm);
483 }
484
485 switch (ext) {
486 #ifdef CONFIG_BOOKE
487 case KVM_CAP_PPC_BOOKE_SREGS:
488 case KVM_CAP_PPC_BOOKE_WATCHDOG:
489 case KVM_CAP_PPC_EPR:
490 #else
491 case KVM_CAP_PPC_SEGSTATE:
492 case KVM_CAP_PPC_HIOR:
493 case KVM_CAP_PPC_PAPR:
494 #endif
495 case KVM_CAP_PPC_UNSET_IRQ:
496 case KVM_CAP_PPC_IRQ_LEVEL:
497 case KVM_CAP_ENABLE_CAP:
498 case KVM_CAP_ENABLE_CAP_VM:
499 case KVM_CAP_ONE_REG:
500 case KVM_CAP_IOEVENTFD:
501 case KVM_CAP_DEVICE_CTRL:
502 r = 1;
503 break;
504 case KVM_CAP_PPC_PAIRED_SINGLES:
505 case KVM_CAP_PPC_OSI:
506 case KVM_CAP_PPC_GET_PVINFO:
507 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
508 case KVM_CAP_SW_TLB:
509 #endif
510 /* We support this only for PR */
511 r = !hv_enabled;
512 break;
513 #ifdef CONFIG_KVM_MMIO
514 case KVM_CAP_COALESCED_MMIO:
515 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
516 break;
517 #endif
518 #ifdef CONFIG_KVM_MPIC
519 case KVM_CAP_IRQ_MPIC:
520 r = 1;
521 break;
522 #endif
523
524 #ifdef CONFIG_PPC_BOOK3S_64
525 case KVM_CAP_SPAPR_TCE:
526 case KVM_CAP_SPAPR_TCE_64:
527 case KVM_CAP_PPC_ALLOC_HTAB:
528 case KVM_CAP_PPC_RTAS:
529 case KVM_CAP_PPC_FIXUP_HCALL:
530 case KVM_CAP_PPC_ENABLE_HCALL:
531 #ifdef CONFIG_KVM_XICS
532 case KVM_CAP_IRQ_XICS:
533 #endif
534 r = 1;
535 break;
536 #endif /* CONFIG_PPC_BOOK3S_64 */
537 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
538 case KVM_CAP_PPC_SMT:
539 if (hv_enabled)
540 r = threads_per_subcore;
541 else
542 r = 0;
543 break;
544 case KVM_CAP_PPC_RMA:
545 r = 0;
546 break;
547 case KVM_CAP_PPC_HWRNG:
548 r = kvmppc_hwrng_present();
549 break;
550 #endif
551 case KVM_CAP_SYNC_MMU:
552 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
553 r = hv_enabled;
554 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
555 r = 1;
556 #else
557 r = 0;
558 #endif
559 break;
560 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
561 case KVM_CAP_PPC_HTAB_FD:
562 r = hv_enabled;
563 break;
564 #endif
565 case KVM_CAP_NR_VCPUS:
566 /*
567 * Recommending a number of CPUs is somewhat arbitrary; we
568 * return the number of present CPUs for -HV (since a host
569 * will have secondary threads "offline"), and for other KVM
570 * implementations just count online CPUs.
571 */
572 if (hv_enabled)
573 r = num_present_cpus();
574 else
575 r = num_online_cpus();
576 break;
577 case KVM_CAP_NR_MEMSLOTS:
578 r = KVM_USER_MEM_SLOTS;
579 break;
580 case KVM_CAP_MAX_VCPUS:
581 r = KVM_MAX_VCPUS;
582 break;
583 #ifdef CONFIG_PPC_BOOK3S_64
584 case KVM_CAP_PPC_GET_SMMU_INFO:
585 r = 1;
586 break;
587 case KVM_CAP_SPAPR_MULTITCE:
588 r = 1;
589 break;
590 #endif
591 default:
592 r = 0;
593 break;
594 }
595 return r;
596
597 }
598
599 long kvm_arch_dev_ioctl(struct file *filp,
600 unsigned int ioctl, unsigned long arg)
601 {
602 return -EINVAL;
603 }
604
605 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
606 struct kvm_memory_slot *dont)
607 {
608 kvmppc_core_free_memslot(kvm, free, dont);
609 }
610
611 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
612 unsigned long npages)
613 {
614 return kvmppc_core_create_memslot(kvm, slot, npages);
615 }
616
617 int kvm_arch_prepare_memory_region(struct kvm *kvm,
618 struct kvm_memory_slot *memslot,
619 const struct kvm_userspace_memory_region *mem,
620 enum kvm_mr_change change)
621 {
622 return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
623 }
624
625 void kvm_arch_commit_memory_region(struct kvm *kvm,
626 const struct kvm_userspace_memory_region *mem,
627 const struct kvm_memory_slot *old,
628 const struct kvm_memory_slot *new,
629 enum kvm_mr_change change)
630 {
631 kvmppc_core_commit_memory_region(kvm, mem, old, new);
632 }
633
634 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
635 struct kvm_memory_slot *slot)
636 {
637 kvmppc_core_flush_memslot(kvm, slot);
638 }
639
640 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
641 {
642 struct kvm_vcpu *vcpu;
643 vcpu = kvmppc_core_vcpu_create(kvm, id);
644 if (!IS_ERR(vcpu)) {
645 vcpu->arch.wqp = &vcpu->wq;
646 kvmppc_create_vcpu_debugfs(vcpu, id);
647 }
648 return vcpu;
649 }
650
651 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
652 {
653 }
654
655 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
656 {
657 /* Make sure we're not using the vcpu anymore */
658 hrtimer_cancel(&vcpu->arch.dec_timer);
659
660 kvmppc_remove_vcpu_debugfs(vcpu);
661
662 switch (vcpu->arch.irq_type) {
663 case KVMPPC_IRQ_MPIC:
664 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
665 break;
666 case KVMPPC_IRQ_XICS:
667 kvmppc_xics_free_icp(vcpu);
668 break;
669 }
670
671 kvmppc_core_vcpu_free(vcpu);
672 }
673
674 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
675 {
676 kvm_arch_vcpu_free(vcpu);
677 }
678
679 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
680 {
681 return kvmppc_core_pending_dec(vcpu);
682 }
683
684 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
685 {
686 struct kvm_vcpu *vcpu;
687
688 vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
689 kvmppc_decrementer_func(vcpu);
690
691 return HRTIMER_NORESTART;
692 }
693
694 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
695 {
696 int ret;
697
698 hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
699 vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
700 vcpu->arch.dec_expires = ~(u64)0;
701
702 #ifdef CONFIG_KVM_EXIT_TIMING
703 mutex_init(&vcpu->arch.exit_timing_lock);
704 #endif
705 ret = kvmppc_subarch_vcpu_init(vcpu);
706 return ret;
707 }
708
709 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
710 {
711 kvmppc_mmu_destroy(vcpu);
712 kvmppc_subarch_vcpu_uninit(vcpu);
713 }
714
715 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
716 {
717 #ifdef CONFIG_BOOKE
718 /*
719 * vrsave (formerly usprg0) isn't used by Linux, but may
720 * be used by the guest.
721 *
722 * On non-booke this is associated with Altivec and
723 * is handled by code in book3s.c.
724 */
725 mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
726 #endif
727 kvmppc_core_vcpu_load(vcpu, cpu);
728 }
729
730 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
731 {
732 kvmppc_core_vcpu_put(vcpu);
733 #ifdef CONFIG_BOOKE
734 vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
735 #endif
736 }
737
738 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
739 struct kvm_run *run)
740 {
741 u64 uninitialized_var(gpr);
742
743 if (run->mmio.len > sizeof(gpr)) {
744 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
745 return;
746 }
747
748 if (!vcpu->arch.mmio_host_swabbed) {
749 switch (run->mmio.len) {
750 case 8: gpr = *(u64 *)run->mmio.data; break;
751 case 4: gpr = *(u32 *)run->mmio.data; break;
752 case 2: gpr = *(u16 *)run->mmio.data; break;
753 case 1: gpr = *(u8 *)run->mmio.data; break;
754 }
755 } else {
756 switch (run->mmio.len) {
757 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
758 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
759 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
760 case 1: gpr = *(u8 *)run->mmio.data; break;
761 }
762 }
763
764 if (vcpu->arch.mmio_sign_extend) {
765 switch (run->mmio.len) {
766 #ifdef CONFIG_PPC64
767 case 4:
768 gpr = (s64)(s32)gpr;
769 break;
770 #endif
771 case 2:
772 gpr = (s64)(s16)gpr;
773 break;
774 case 1:
775 gpr = (s64)(s8)gpr;
776 break;
777 }
778 }
779
780 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
781
782 switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
783 case KVM_MMIO_REG_GPR:
784 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
785 break;
786 case KVM_MMIO_REG_FPR:
787 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
788 break;
789 #ifdef CONFIG_PPC_BOOK3S
790 case KVM_MMIO_REG_QPR:
791 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
792 break;
793 case KVM_MMIO_REG_FQPR:
794 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
795 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
796 break;
797 #endif
798 default:
799 BUG();
800 }
801 }
802
803 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
804 unsigned int rt, unsigned int bytes,
805 int is_default_endian)
806 {
807 int idx, ret;
808 bool host_swabbed;
809
810 /* Pity C doesn't have a logical XOR operator */
811 if (kvmppc_need_byteswap(vcpu)) {
812 host_swabbed = is_default_endian;
813 } else {
814 host_swabbed = !is_default_endian;
815 }
816
817 if (bytes > sizeof(run->mmio.data)) {
818 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
819 run->mmio.len);
820 }
821
822 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
823 run->mmio.len = bytes;
824 run->mmio.is_write = 0;
825
826 vcpu->arch.io_gpr = rt;
827 vcpu->arch.mmio_host_swabbed = host_swabbed;
828 vcpu->mmio_needed = 1;
829 vcpu->mmio_is_write = 0;
830 vcpu->arch.mmio_sign_extend = 0;
831
832 idx = srcu_read_lock(&vcpu->kvm->srcu);
833
834 ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
835 bytes, &run->mmio.data);
836
837 srcu_read_unlock(&vcpu->kvm->srcu, idx);
838
839 if (!ret) {
840 kvmppc_complete_mmio_load(vcpu, run);
841 vcpu->mmio_needed = 0;
842 return EMULATE_DONE;
843 }
844
845 return EMULATE_DO_MMIO;
846 }
847 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
848
849 /* Same as above, but sign extends */
850 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
851 unsigned int rt, unsigned int bytes,
852 int is_default_endian)
853 {
854 int r;
855
856 vcpu->arch.mmio_sign_extend = 1;
857 r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
858
859 return r;
860 }
861
862 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
863 u64 val, unsigned int bytes, int is_default_endian)
864 {
865 void *data = run->mmio.data;
866 int idx, ret;
867 bool host_swabbed;
868
869 /* Pity C doesn't have a logical XOR operator */
870 if (kvmppc_need_byteswap(vcpu)) {
871 host_swabbed = is_default_endian;
872 } else {
873 host_swabbed = !is_default_endian;
874 }
875
876 if (bytes > sizeof(run->mmio.data)) {
877 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
878 run->mmio.len);
879 }
880
881 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
882 run->mmio.len = bytes;
883 run->mmio.is_write = 1;
884 vcpu->mmio_needed = 1;
885 vcpu->mmio_is_write = 1;
886
887 /* Store the value at the lowest bytes in 'data'. */
888 if (!host_swabbed) {
889 switch (bytes) {
890 case 8: *(u64 *)data = val; break;
891 case 4: *(u32 *)data = val; break;
892 case 2: *(u16 *)data = val; break;
893 case 1: *(u8 *)data = val; break;
894 }
895 } else {
896 switch (bytes) {
897 case 8: *(u64 *)data = swab64(val); break;
898 case 4: *(u32 *)data = swab32(val); break;
899 case 2: *(u16 *)data = swab16(val); break;
900 case 1: *(u8 *)data = val; break;
901 }
902 }
903
904 idx = srcu_read_lock(&vcpu->kvm->srcu);
905
906 ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
907 bytes, &run->mmio.data);
908
909 srcu_read_unlock(&vcpu->kvm->srcu, idx);
910
911 if (!ret) {
912 vcpu->mmio_needed = 0;
913 return EMULATE_DONE;
914 }
915
916 return EMULATE_DO_MMIO;
917 }
918 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
919
920 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
921 {
922 int r = 0;
923 union kvmppc_one_reg val;
924 int size;
925
926 size = one_reg_size(reg->id);
927 if (size > sizeof(val))
928 return -EINVAL;
929
930 r = kvmppc_get_one_reg(vcpu, reg->id, &val);
931 if (r == -EINVAL) {
932 r = 0;
933 switch (reg->id) {
934 #ifdef CONFIG_ALTIVEC
935 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
936 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
937 r = -ENXIO;
938 break;
939 }
940 val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
941 break;
942 case KVM_REG_PPC_VSCR:
943 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
944 r = -ENXIO;
945 break;
946 }
947 val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
948 break;
949 case KVM_REG_PPC_VRSAVE:
950 val = get_reg_val(reg->id, vcpu->arch.vrsave);
951 break;
952 #endif /* CONFIG_ALTIVEC */
953 default:
954 r = -EINVAL;
955 break;
956 }
957 }
958
959 if (r)
960 return r;
961
962 if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
963 r = -EFAULT;
964
965 return r;
966 }
967
968 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
969 {
970 int r;
971 union kvmppc_one_reg val;
972 int size;
973
974 size = one_reg_size(reg->id);
975 if (size > sizeof(val))
976 return -EINVAL;
977
978 if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
979 return -EFAULT;
980
981 r = kvmppc_set_one_reg(vcpu, reg->id, &val);
982 if (r == -EINVAL) {
983 r = 0;
984 switch (reg->id) {
985 #ifdef CONFIG_ALTIVEC
986 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
987 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
988 r = -ENXIO;
989 break;
990 }
991 vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
992 break;
993 case KVM_REG_PPC_VSCR:
994 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
995 r = -ENXIO;
996 break;
997 }
998 vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
999 break;
1000 case KVM_REG_PPC_VRSAVE:
1001 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1002 r = -ENXIO;
1003 break;
1004 }
1005 vcpu->arch.vrsave = set_reg_val(reg->id, val);
1006 break;
1007 #endif /* CONFIG_ALTIVEC */
1008 default:
1009 r = -EINVAL;
1010 break;
1011 }
1012 }
1013
1014 return r;
1015 }
1016
1017 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
1018 {
1019 int r;
1020 sigset_t sigsaved;
1021
1022 if (vcpu->sigset_active)
1023 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
1024
1025 if (vcpu->mmio_needed) {
1026 if (!vcpu->mmio_is_write)
1027 kvmppc_complete_mmio_load(vcpu, run);
1028 vcpu->mmio_needed = 0;
1029 } else if (vcpu->arch.osi_needed) {
1030 u64 *gprs = run->osi.gprs;
1031 int i;
1032
1033 for (i = 0; i < 32; i++)
1034 kvmppc_set_gpr(vcpu, i, gprs[i]);
1035 vcpu->arch.osi_needed = 0;
1036 } else if (vcpu->arch.hcall_needed) {
1037 int i;
1038
1039 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1040 for (i = 0; i < 9; ++i)
1041 kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1042 vcpu->arch.hcall_needed = 0;
1043 #ifdef CONFIG_BOOKE
1044 } else if (vcpu->arch.epr_needed) {
1045 kvmppc_set_epr(vcpu, run->epr.epr);
1046 vcpu->arch.epr_needed = 0;
1047 #endif
1048 }
1049
1050 r = kvmppc_vcpu_run(run, vcpu);
1051
1052 if (vcpu->sigset_active)
1053 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1054
1055 return r;
1056 }
1057
1058 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1059 {
1060 if (irq->irq == KVM_INTERRUPT_UNSET) {
1061 kvmppc_core_dequeue_external(vcpu);
1062 return 0;
1063 }
1064
1065 kvmppc_core_queue_external(vcpu, irq);
1066
1067 kvm_vcpu_kick(vcpu);
1068
1069 return 0;
1070 }
1071
1072 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1073 struct kvm_enable_cap *cap)
1074 {
1075 int r;
1076
1077 if (cap->flags)
1078 return -EINVAL;
1079
1080 switch (cap->cap) {
1081 case KVM_CAP_PPC_OSI:
1082 r = 0;
1083 vcpu->arch.osi_enabled = true;
1084 break;
1085 case KVM_CAP_PPC_PAPR:
1086 r = 0;
1087 vcpu->arch.papr_enabled = true;
1088 break;
1089 case KVM_CAP_PPC_EPR:
1090 r = 0;
1091 if (cap->args[0])
1092 vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1093 else
1094 vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1095 break;
1096 #ifdef CONFIG_BOOKE
1097 case KVM_CAP_PPC_BOOKE_WATCHDOG:
1098 r = 0;
1099 vcpu->arch.watchdog_enabled = true;
1100 break;
1101 #endif
1102 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1103 case KVM_CAP_SW_TLB: {
1104 struct kvm_config_tlb cfg;
1105 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1106
1107 r = -EFAULT;
1108 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1109 break;
1110
1111 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1112 break;
1113 }
1114 #endif
1115 #ifdef CONFIG_KVM_MPIC
1116 case KVM_CAP_IRQ_MPIC: {
1117 struct fd f;
1118 struct kvm_device *dev;
1119
1120 r = -EBADF;
1121 f = fdget(cap->args[0]);
1122 if (!f.file)
1123 break;
1124
1125 r = -EPERM;
1126 dev = kvm_device_from_filp(f.file);
1127 if (dev)
1128 r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1129
1130 fdput(f);
1131 break;
1132 }
1133 #endif
1134 #ifdef CONFIG_KVM_XICS
1135 case KVM_CAP_IRQ_XICS: {
1136 struct fd f;
1137 struct kvm_device *dev;
1138
1139 r = -EBADF;
1140 f = fdget(cap->args[0]);
1141 if (!f.file)
1142 break;
1143
1144 r = -EPERM;
1145 dev = kvm_device_from_filp(f.file);
1146 if (dev)
1147 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1148
1149 fdput(f);
1150 break;
1151 }
1152 #endif /* CONFIG_KVM_XICS */
1153 default:
1154 r = -EINVAL;
1155 break;
1156 }
1157
1158 if (!r)
1159 r = kvmppc_sanity_check(vcpu);
1160
1161 return r;
1162 }
1163
1164 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1165 struct kvm_mp_state *mp_state)
1166 {
1167 return -EINVAL;
1168 }
1169
1170 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1171 struct kvm_mp_state *mp_state)
1172 {
1173 return -EINVAL;
1174 }
1175
1176 long kvm_arch_vcpu_ioctl(struct file *filp,
1177 unsigned int ioctl, unsigned long arg)
1178 {
1179 struct kvm_vcpu *vcpu = filp->private_data;
1180 void __user *argp = (void __user *)arg;
1181 long r;
1182
1183 switch (ioctl) {
1184 case KVM_INTERRUPT: {
1185 struct kvm_interrupt irq;
1186 r = -EFAULT;
1187 if (copy_from_user(&irq, argp, sizeof(irq)))
1188 goto out;
1189 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1190 goto out;
1191 }
1192
1193 case KVM_ENABLE_CAP:
1194 {
1195 struct kvm_enable_cap cap;
1196 r = -EFAULT;
1197 if (copy_from_user(&cap, argp, sizeof(cap)))
1198 goto out;
1199 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1200 break;
1201 }
1202
1203 case KVM_SET_ONE_REG:
1204 case KVM_GET_ONE_REG:
1205 {
1206 struct kvm_one_reg reg;
1207 r = -EFAULT;
1208 if (copy_from_user(&reg, argp, sizeof(reg)))
1209 goto out;
1210 if (ioctl == KVM_SET_ONE_REG)
1211 r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1212 else
1213 r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1214 break;
1215 }
1216
1217 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1218 case KVM_DIRTY_TLB: {
1219 struct kvm_dirty_tlb dirty;
1220 r = -EFAULT;
1221 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1222 goto out;
1223 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1224 break;
1225 }
1226 #endif
1227 default:
1228 r = -EINVAL;
1229 }
1230
1231 out:
1232 return r;
1233 }
1234
1235 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1236 {
1237 return VM_FAULT_SIGBUS;
1238 }
1239
1240 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1241 {
1242 u32 inst_nop = 0x60000000;
1243 #ifdef CONFIG_KVM_BOOKE_HV
1244 u32 inst_sc1 = 0x44000022;
1245 pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1246 pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1247 pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1248 pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1249 #else
1250 u32 inst_lis = 0x3c000000;
1251 u32 inst_ori = 0x60000000;
1252 u32 inst_sc = 0x44000002;
1253 u32 inst_imm_mask = 0xffff;
1254
1255 /*
1256 * The hypercall to get into KVM from within guest context is as
1257 * follows:
1258 *
1259 * lis r0, r0, KVM_SC_MAGIC_R0@h
1260 * ori r0, KVM_SC_MAGIC_R0@l
1261 * sc
1262 * nop
1263 */
1264 pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1265 pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1266 pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1267 pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1268 #endif
1269
1270 pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1271
1272 return 0;
1273 }
1274
1275 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1276 bool line_status)
1277 {
1278 if (!irqchip_in_kernel(kvm))
1279 return -ENXIO;
1280
1281 irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1282 irq_event->irq, irq_event->level,
1283 line_status);
1284 return 0;
1285 }
1286
1287
1288 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1289 struct kvm_enable_cap *cap)
1290 {
1291 int r;
1292
1293 if (cap->flags)
1294 return -EINVAL;
1295
1296 switch (cap->cap) {
1297 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1298 case KVM_CAP_PPC_ENABLE_HCALL: {
1299 unsigned long hcall = cap->args[0];
1300
1301 r = -EINVAL;
1302 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1303 cap->args[1] > 1)
1304 break;
1305 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1306 break;
1307 if (cap->args[1])
1308 set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1309 else
1310 clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1311 r = 0;
1312 break;
1313 }
1314 #endif
1315 default:
1316 r = -EINVAL;
1317 break;
1318 }
1319
1320 return r;
1321 }
1322
1323 long kvm_arch_vm_ioctl(struct file *filp,
1324 unsigned int ioctl, unsigned long arg)
1325 {
1326 struct kvm *kvm __maybe_unused = filp->private_data;
1327 void __user *argp = (void __user *)arg;
1328 long r;
1329
1330 switch (ioctl) {
1331 case KVM_PPC_GET_PVINFO: {
1332 struct kvm_ppc_pvinfo pvinfo;
1333 memset(&pvinfo, 0, sizeof(pvinfo));
1334 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1335 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1336 r = -EFAULT;
1337 goto out;
1338 }
1339
1340 break;
1341 }
1342 case KVM_ENABLE_CAP:
1343 {
1344 struct kvm_enable_cap cap;
1345 r = -EFAULT;
1346 if (copy_from_user(&cap, argp, sizeof(cap)))
1347 goto out;
1348 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1349 break;
1350 }
1351 #ifdef CONFIG_PPC_BOOK3S_64
1352 case KVM_CREATE_SPAPR_TCE_64: {
1353 struct kvm_create_spapr_tce_64 create_tce_64;
1354
1355 r = -EFAULT;
1356 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
1357 goto out;
1358 if (create_tce_64.flags) {
1359 r = -EINVAL;
1360 goto out;
1361 }
1362 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1363 goto out;
1364 }
1365 case KVM_CREATE_SPAPR_TCE: {
1366 struct kvm_create_spapr_tce create_tce;
1367 struct kvm_create_spapr_tce_64 create_tce_64;
1368
1369 r = -EFAULT;
1370 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1371 goto out;
1372
1373 create_tce_64.liobn = create_tce.liobn;
1374 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
1375 create_tce_64.offset = 0;
1376 create_tce_64.size = create_tce.window_size >>
1377 IOMMU_PAGE_SHIFT_4K;
1378 create_tce_64.flags = 0;
1379 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1380 goto out;
1381 }
1382 case KVM_PPC_GET_SMMU_INFO: {
1383 struct kvm_ppc_smmu_info info;
1384 struct kvm *kvm = filp->private_data;
1385
1386 memset(&info, 0, sizeof(info));
1387 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1388 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1389 r = -EFAULT;
1390 break;
1391 }
1392 case KVM_PPC_RTAS_DEFINE_TOKEN: {
1393 struct kvm *kvm = filp->private_data;
1394
1395 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1396 break;
1397 }
1398 default: {
1399 struct kvm *kvm = filp->private_data;
1400 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1401 }
1402 #else /* CONFIG_PPC_BOOK3S_64 */
1403 default:
1404 r = -ENOTTY;
1405 #endif
1406 }
1407 out:
1408 return r;
1409 }
1410
1411 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1412 static unsigned long nr_lpids;
1413
1414 long kvmppc_alloc_lpid(void)
1415 {
1416 long lpid;
1417
1418 do {
1419 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1420 if (lpid >= nr_lpids) {
1421 pr_err("%s: No LPIDs free\n", __func__);
1422 return -ENOMEM;
1423 }
1424 } while (test_and_set_bit(lpid, lpid_inuse));
1425
1426 return lpid;
1427 }
1428 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1429
1430 void kvmppc_claim_lpid(long lpid)
1431 {
1432 set_bit(lpid, lpid_inuse);
1433 }
1434 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1435
1436 void kvmppc_free_lpid(long lpid)
1437 {
1438 clear_bit(lpid, lpid_inuse);
1439 }
1440 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1441
1442 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1443 {
1444 nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1445 memset(lpid_inuse, 0, sizeof(lpid_inuse));
1446 }
1447 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1448
1449 int kvm_arch_init(void *opaque)
1450 {
1451 return 0;
1452 }
1453
1454 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);
Linux with added FPC-III support