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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/sched/signal.h>
27#include <linux/fs.h>
28#include <linux/slab.h>
29#include <linux/file.h>
30#include <linux/module.h>
31#include <linux/irqbypass.h>
32#include <linux/kvm_irqfd.h>
33#include <asm/cputable.h>
34#include <linux/uaccess.h>
35#include <asm/kvm_ppc.h>
36#include <asm/tlbflush.h>
37#include <asm/cputhreads.h>
38#include <asm/irqflags.h>
39#include <asm/iommu.h>
40#include <asm/switch_to.h>
41#include <asm/xive.h>
42
43#include "timing.h"
44#include "irq.h"
45#include "../mm/mmu_decl.h"
46
47#define CREATE_TRACE_POINTS
48#include "trace.h"
49
50struct kvmppc_ops *kvmppc_hv_ops;
51EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
52struct kvmppc_ops *kvmppc_pr_ops;
53EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
54
55
56int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
57{
58 return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
59}
60
61int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
62{
63 return 1;
64}
65
66/*
67 * Common checks before entering the guest world. Call with interrupts
68 * disabled.
69 *
70 * returns:
71 *
72 * == 1 if we're ready to go into guest state
73 * <= 0 if we need to go back to the host with return value
74 */
75int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
76{
77 int r;
78
79 WARN_ON(irqs_disabled());
80 hard_irq_disable();
81
82 while (true) {
83 if (need_resched()) {
84 local_irq_enable();
85 cond_resched();
86 hard_irq_disable();
87 continue;
88 }
89
90 if (signal_pending(current)) {
91 kvmppc_account_exit(vcpu, SIGNAL_EXITS);
92 vcpu->run->exit_reason = KVM_EXIT_INTR;
93 r = -EINTR;
94 break;
95 }
96
97 vcpu->mode = IN_GUEST_MODE;
98
99 /*
100 * Reading vcpu->requests must happen after setting vcpu->mode,
101 * so we don't miss a request because the requester sees
102 * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
103 * before next entering the guest (and thus doesn't IPI).
104 * This also orders the write to mode from any reads
105 * to the page tables done while the VCPU is running.
106 * Please see the comment in kvm_flush_remote_tlbs.
107 */
108 smp_mb();
109
110 if (kvm_request_pending(vcpu)) {
111 /* Make sure we process requests preemptable */
112 local_irq_enable();
113 trace_kvm_check_requests(vcpu);
114 r = kvmppc_core_check_requests(vcpu);
115 hard_irq_disable();
116 if (r > 0)
117 continue;
118 break;
119 }
120
121 if (kvmppc_core_prepare_to_enter(vcpu)) {
122 /* interrupts got enabled in between, so we
123 are back at square 1 */
124 continue;
125 }
126
127 guest_enter_irqoff();
128 return 1;
129 }
130
131 /* return to host */
132 local_irq_enable();
133 return r;
134}
135EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
136
137#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
138static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
139{
140 struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
141 int i;
142
143 shared->sprg0 = swab64(shared->sprg0);
144 shared->sprg1 = swab64(shared->sprg1);
145 shared->sprg2 = swab64(shared->sprg2);
146 shared->sprg3 = swab64(shared->sprg3);
147 shared->srr0 = swab64(shared->srr0);
148 shared->srr1 = swab64(shared->srr1);
149 shared->dar = swab64(shared->dar);
150 shared->msr = swab64(shared->msr);
151 shared->dsisr = swab32(shared->dsisr);
152 shared->int_pending = swab32(shared->int_pending);
153 for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
154 shared->sr[i] = swab32(shared->sr[i]);
155}
156#endif
157
158int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
159{
160 int nr = kvmppc_get_gpr(vcpu, 11);
161 int r;
162 unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
163 unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
164 unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
165 unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
166 unsigned long r2 = 0;
167
168 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
169 /* 32 bit mode */
170 param1 &= 0xffffffff;
171 param2 &= 0xffffffff;
172 param3 &= 0xffffffff;
173 param4 &= 0xffffffff;
174 }
175
176 switch (nr) {
177 case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
178 {
179#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
180 /* Book3S can be little endian, find it out here */
181 int shared_big_endian = true;
182 if (vcpu->arch.intr_msr & MSR_LE)
183 shared_big_endian = false;
184 if (shared_big_endian != vcpu->arch.shared_big_endian)
185 kvmppc_swab_shared(vcpu);
186 vcpu->arch.shared_big_endian = shared_big_endian;
187#endif
188
189 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
190 /*
191 * Older versions of the Linux magic page code had
192 * a bug where they would map their trampoline code
193 * NX. If that's the case, remove !PR NX capability.
194 */
195 vcpu->arch.disable_kernel_nx = true;
196 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
197 }
198
199 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
200 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
201
202#ifdef CONFIG_PPC_64K_PAGES
203 /*
204 * Make sure our 4k magic page is in the same window of a 64k
205 * page within the guest and within the host's page.
206 */
207 if ((vcpu->arch.magic_page_pa & 0xf000) !=
208 ((ulong)vcpu->arch.shared & 0xf000)) {
209 void *old_shared = vcpu->arch.shared;
210 ulong shared = (ulong)vcpu->arch.shared;
211 void *new_shared;
212
213 shared &= PAGE_MASK;
214 shared |= vcpu->arch.magic_page_pa & 0xf000;
215 new_shared = (void*)shared;
216 memcpy(new_shared, old_shared, 0x1000);
217 vcpu->arch.shared = new_shared;
218 }
219#endif
220
221 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
222
223 r = EV_SUCCESS;
224 break;
225 }
226 case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
227 r = EV_SUCCESS;
228#if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
229 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
230#endif
231
232 /* Second return value is in r4 */
233 break;
234 case EV_HCALL_TOKEN(EV_IDLE):
235 r = EV_SUCCESS;
236 kvm_vcpu_block(vcpu);
237 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
238 break;
239 default:
240 r = EV_UNIMPLEMENTED;
241 break;
242 }
243
244 kvmppc_set_gpr(vcpu, 4, r2);
245
246 return r;
247}
248EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
249
250int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
251{
252 int r = false;
253
254 /* We have to know what CPU to virtualize */
255 if (!vcpu->arch.pvr)
256 goto out;
257
258 /* PAPR only works with book3s_64 */
259 if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
260 goto out;
261
262 /* HV KVM can only do PAPR mode for now */
263 if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
264 goto out;
265
266#ifdef CONFIG_KVM_BOOKE_HV
267 if (!cpu_has_feature(CPU_FTR_EMB_HV))
268 goto out;
269#endif
270
271 r = true;
272
273out:
274 vcpu->arch.sane = r;
275 return r ? 0 : -EINVAL;
276}
277EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
278
279int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
280{
281 enum emulation_result er;
282 int r;
283
284 er = kvmppc_emulate_loadstore(vcpu);
285 switch (er) {
286 case EMULATE_DONE:
287 /* Future optimization: only reload non-volatiles if they were
288 * actually modified. */
289 r = RESUME_GUEST_NV;
290 break;
291 case EMULATE_AGAIN:
292 r = RESUME_GUEST;
293 break;
294 case EMULATE_DO_MMIO:
295 run->exit_reason = KVM_EXIT_MMIO;
296 /* We must reload nonvolatiles because "update" load/store
297 * instructions modify register state. */
298 /* Future optimization: only reload non-volatiles if they were
299 * actually modified. */
300 r = RESUME_HOST_NV;
301 break;
302 case EMULATE_FAIL:
303 {
304 u32 last_inst;
305
306 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
307 /* XXX Deliver Program interrupt to guest. */
308 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
309 r = RESUME_HOST;
310 break;
311 }
312 default:
313 WARN_ON(1);
314 r = RESUME_GUEST;
315 }
316
317 return r;
318}
319EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
320
321int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
322 bool data)
323{
324 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
325 struct kvmppc_pte pte;
326 int r;
327
328 vcpu->stat.st++;
329
330 r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
331 XLATE_WRITE, &pte);
332 if (r < 0)
333 return r;
334
335 *eaddr = pte.raddr;
336
337 if (!pte.may_write)
338 return -EPERM;
339
340 /* Magic page override */
341 if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
342 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
343 !(kvmppc_get_msr(vcpu) & MSR_PR)) {
344 void *magic = vcpu->arch.shared;
345 magic += pte.eaddr & 0xfff;
346 memcpy(magic, ptr, size);
347 return EMULATE_DONE;
348 }
349
350 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
351 return EMULATE_DO_MMIO;
352
353 return EMULATE_DONE;
354}
355EXPORT_SYMBOL_GPL(kvmppc_st);
356
357int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
358 bool data)
359{
360 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
361 struct kvmppc_pte pte;
362 int rc;
363
364 vcpu->stat.ld++;
365
366 rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
367 XLATE_READ, &pte);
368 if (rc)
369 return rc;
370
371 *eaddr = pte.raddr;
372
373 if (!pte.may_read)
374 return -EPERM;
375
376 if (!data && !pte.may_execute)
377 return -ENOEXEC;
378
379 /* Magic page override */
380 if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
381 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
382 !(kvmppc_get_msr(vcpu) & MSR_PR)) {
383 void *magic = vcpu->arch.shared;
384 magic += pte.eaddr & 0xfff;
385 memcpy(ptr, magic, size);
386 return EMULATE_DONE;
387 }
388
389 if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
390 return EMULATE_DO_MMIO;
391
392 return EMULATE_DONE;
393}
394EXPORT_SYMBOL_GPL(kvmppc_ld);
395
396int kvm_arch_hardware_enable(void)
397{
398 return 0;
399}
400
401int kvm_arch_hardware_setup(void)
402{
403 return 0;
404}
405
406void kvm_arch_check_processor_compat(void *rtn)
407{
408 *(int *)rtn = kvmppc_core_check_processor_compat();
409}
410
411int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
412{
413 struct kvmppc_ops *kvm_ops = NULL;
414 /*
415 * if we have both HV and PR enabled, default is HV
416 */
417 if (type == 0) {
418 if (kvmppc_hv_ops)
419 kvm_ops = kvmppc_hv_ops;
420 else
421 kvm_ops = kvmppc_pr_ops;
422 if (!kvm_ops)
423 goto err_out;
424 } else if (type == KVM_VM_PPC_HV) {
425 if (!kvmppc_hv_ops)
426 goto err_out;
427 kvm_ops = kvmppc_hv_ops;
428 } else if (type == KVM_VM_PPC_PR) {
429 if (!kvmppc_pr_ops)
430 goto err_out;
431 kvm_ops = kvmppc_pr_ops;
432 } else
433 goto err_out;
434
435 if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
436 return -ENOENT;
437
438 kvm->arch.kvm_ops = kvm_ops;
439 return kvmppc_core_init_vm(kvm);
440err_out:
441 return -EINVAL;
442}
443
444bool kvm_arch_has_vcpu_debugfs(void)
445{
446 return false;
447}
448
449int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
450{
451 return 0;
452}
453
454void kvm_arch_destroy_vm(struct kvm *kvm)
455{
456 unsigned int i;
457 struct kvm_vcpu *vcpu;
458
459#ifdef CONFIG_KVM_XICS
460 /*
461 * We call kick_all_cpus_sync() to ensure that all
462 * CPUs have executed any pending IPIs before we
463 * continue and free VCPUs structures below.
464 */
465 if (is_kvmppc_hv_enabled(kvm))
466 kick_all_cpus_sync();
467#endif
468
469 kvm_for_each_vcpu(i, vcpu, kvm)
470 kvm_arch_vcpu_free(vcpu);
471
472 mutex_lock(&kvm->lock);
473 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
474 kvm->vcpus[i] = NULL;
475
476 atomic_set(&kvm->online_vcpus, 0);
477
478 kvmppc_core_destroy_vm(kvm);
479
480 mutex_unlock(&kvm->lock);
481
482 /* drop the module reference */
483 module_put(kvm->arch.kvm_ops->owner);
484}
485
486int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
487{
488 int r;
489 /* Assume we're using HV mode when the HV module is loaded */
490 int hv_enabled = kvmppc_hv_ops ? 1 : 0;
491
492 if (kvm) {
493 /*
494 * Hooray - we know which VM type we're running on. Depend on
495 * that rather than the guess above.
496 */
497 hv_enabled = is_kvmppc_hv_enabled(kvm);
498 }
499
500 switch (ext) {
501#ifdef CONFIG_BOOKE
502 case KVM_CAP_PPC_BOOKE_SREGS:
503 case KVM_CAP_PPC_BOOKE_WATCHDOG:
504 case KVM_CAP_PPC_EPR:
505#else
506 case KVM_CAP_PPC_SEGSTATE:
507 case KVM_CAP_PPC_HIOR:
508 case KVM_CAP_PPC_PAPR:
509#endif
510 case KVM_CAP_PPC_UNSET_IRQ:
511 case KVM_CAP_PPC_IRQ_LEVEL:
512 case KVM_CAP_ENABLE_CAP:
513 case KVM_CAP_ENABLE_CAP_VM:
514 case KVM_CAP_ONE_REG:
515 case KVM_CAP_IOEVENTFD:
516 case KVM_CAP_DEVICE_CTRL:
517 case KVM_CAP_IMMEDIATE_EXIT:
518 r = 1;
519 break;
520 case KVM_CAP_PPC_PAIRED_SINGLES:
521 case KVM_CAP_PPC_OSI:
522 case KVM_CAP_PPC_GET_PVINFO:
523#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
524 case KVM_CAP_SW_TLB:
525#endif
526 /* We support this only for PR */
527 r = !hv_enabled;
528 break;
529#ifdef CONFIG_KVM_MPIC
530 case KVM_CAP_IRQ_MPIC:
531 r = 1;
532 break;
533#endif
534
535#ifdef CONFIG_PPC_BOOK3S_64
536 case KVM_CAP_SPAPR_TCE:
537 case KVM_CAP_SPAPR_TCE_64:
538 /* fallthrough */
539 case KVM_CAP_SPAPR_TCE_VFIO:
540 case KVM_CAP_PPC_RTAS:
541 case KVM_CAP_PPC_FIXUP_HCALL:
542 case KVM_CAP_PPC_ENABLE_HCALL:
543#ifdef CONFIG_KVM_XICS
544 case KVM_CAP_IRQ_XICS:
545#endif
546 r = 1;
547 break;
548
549 case KVM_CAP_PPC_ALLOC_HTAB:
550 r = hv_enabled;
551 break;
552#endif /* CONFIG_PPC_BOOK3S_64 */
553#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
554 case KVM_CAP_PPC_SMT:
555 r = 0;
556 if (kvm) {
557 if (kvm->arch.emul_smt_mode > 1)
558 r = kvm->arch.emul_smt_mode;
559 else
560 r = kvm->arch.smt_mode;
561 } else if (hv_enabled) {
562 if (cpu_has_feature(CPU_FTR_ARCH_300))
563 r = 1;
564 else
565 r = threads_per_subcore;
566 }
567 break;
568 case KVM_CAP_PPC_SMT_POSSIBLE:
569 r = 1;
570 if (hv_enabled) {
571 if (!cpu_has_feature(CPU_FTR_ARCH_300))
572 r = ((threads_per_subcore << 1) - 1);
573 else
574 /* P9 can emulate dbells, so allow any mode */
575 r = 8 | 4 | 2 | 1;
576 }
577 break;
578 case KVM_CAP_PPC_RMA:
579 r = 0;
580 break;
581 case KVM_CAP_PPC_HWRNG:
582 r = kvmppc_hwrng_present();
583 break;
584 case KVM_CAP_PPC_MMU_RADIX:
585 r = !!(hv_enabled && radix_enabled());
586 break;
587 case KVM_CAP_PPC_MMU_HASH_V3:
588 r = !!(hv_enabled && !radix_enabled() &&
589 cpu_has_feature(CPU_FTR_ARCH_300));
590 break;
591#endif
592 case KVM_CAP_SYNC_MMU:
593#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
594 r = hv_enabled;
595#elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
596 r = 1;
597#else
598 r = 0;
599#endif
600 break;
601#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
602 case KVM_CAP_PPC_HTAB_FD:
603 r = hv_enabled;
604 break;
605#endif
606 case KVM_CAP_NR_VCPUS:
607 /*
608 * Recommending a number of CPUs is somewhat arbitrary; we
609 * return the number of present CPUs for -HV (since a host
610 * will have secondary threads "offline"), and for other KVM
611 * implementations just count online CPUs.
612 */
613 if (hv_enabled)
614 r = num_present_cpus();
615 else
616 r = num_online_cpus();
617 break;
618 case KVM_CAP_NR_MEMSLOTS:
619 r = KVM_USER_MEM_SLOTS;
620 break;
621 case KVM_CAP_MAX_VCPUS:
622 r = KVM_MAX_VCPUS;
623 break;
624#ifdef CONFIG_PPC_BOOK3S_64
625 case KVM_CAP_PPC_GET_SMMU_INFO:
626 r = 1;
627 break;
628 case KVM_CAP_SPAPR_MULTITCE:
629 r = 1;
630 break;
631 case KVM_CAP_SPAPR_RESIZE_HPT:
632 /* Disable this on POWER9 until code handles new HPTE format */
633 r = !!hv_enabled && !cpu_has_feature(CPU_FTR_ARCH_300);
634 break;
635#endif
636#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
637 case KVM_CAP_PPC_FWNMI:
638 r = hv_enabled;
639 break;
640#endif
641 case KVM_CAP_PPC_HTM:
642 r = cpu_has_feature(CPU_FTR_TM_COMP) && hv_enabled;
643 break;
644 default:
645 r = 0;
646 break;
647 }
648 return r;
649
650}
651
652long kvm_arch_dev_ioctl(struct file *filp,
653 unsigned int ioctl, unsigned long arg)
654{
655 return -EINVAL;
656}
657
658void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
659 struct kvm_memory_slot *dont)
660{
661 kvmppc_core_free_memslot(kvm, free, dont);
662}
663
664int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
665 unsigned long npages)
666{
667 return kvmppc_core_create_memslot(kvm, slot, npages);
668}
669
670int kvm_arch_prepare_memory_region(struct kvm *kvm,
671 struct kvm_memory_slot *memslot,
672 const struct kvm_userspace_memory_region *mem,
673 enum kvm_mr_change change)
674{
675 return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
676}
677
678void kvm_arch_commit_memory_region(struct kvm *kvm,
679 const struct kvm_userspace_memory_region *mem,
680 const struct kvm_memory_slot *old,
681 const struct kvm_memory_slot *new,
682 enum kvm_mr_change change)
683{
684 kvmppc_core_commit_memory_region(kvm, mem, old, new);
685}
686
687void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
688 struct kvm_memory_slot *slot)
689{
690 kvmppc_core_flush_memslot(kvm, slot);
691}
692
693struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
694{
695 struct kvm_vcpu *vcpu;
696 vcpu = kvmppc_core_vcpu_create(kvm, id);
697 if (!IS_ERR(vcpu)) {
698 vcpu->arch.wqp = &vcpu->wq;
699 kvmppc_create_vcpu_debugfs(vcpu, id);
700 }
701 return vcpu;
702}
703
704void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
705{
706}
707
708void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
709{
710 /* Make sure we're not using the vcpu anymore */
711 hrtimer_cancel(&vcpu->arch.dec_timer);
712
713 kvmppc_remove_vcpu_debugfs(vcpu);
714
715 switch (vcpu->arch.irq_type) {
716 case KVMPPC_IRQ_MPIC:
717 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
718 break;
719 case KVMPPC_IRQ_XICS:
720 if (xive_enabled())
721 kvmppc_xive_cleanup_vcpu(vcpu);
722 else
723 kvmppc_xics_free_icp(vcpu);
724 break;
725 }
726
727 kvmppc_core_vcpu_free(vcpu);
728}
729
730void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
731{
732 kvm_arch_vcpu_free(vcpu);
733}
734
735int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
736{
737 return kvmppc_core_pending_dec(vcpu);
738}
739
740static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
741{
742 struct kvm_vcpu *vcpu;
743
744 vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
745 kvmppc_decrementer_func(vcpu);
746
747 return HRTIMER_NORESTART;
748}
749
750int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
751{
752 int ret;
753
754 hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
755 vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
756 vcpu->arch.dec_expires = ~(u64)0;
757
758#ifdef CONFIG_KVM_EXIT_TIMING
759 mutex_init(&vcpu->arch.exit_timing_lock);
760#endif
761 ret = kvmppc_subarch_vcpu_init(vcpu);
762 return ret;
763}
764
765void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
766{
767 kvmppc_mmu_destroy(vcpu);
768 kvmppc_subarch_vcpu_uninit(vcpu);
769}
770
771void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
772{
773#ifdef CONFIG_BOOKE
774 /*
775 * vrsave (formerly usprg0) isn't used by Linux, but may
776 * be used by the guest.
777 *
778 * On non-booke this is associated with Altivec and
779 * is handled by code in book3s.c.
780 */
781 mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
782#endif
783 kvmppc_core_vcpu_load(vcpu, cpu);
784}
785
786void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
787{
788 kvmppc_core_vcpu_put(vcpu);
789#ifdef CONFIG_BOOKE
790 vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
791#endif
792}
793
794/*
795 * irq_bypass_add_producer and irq_bypass_del_producer are only
796 * useful if the architecture supports PCI passthrough.
797 * irq_bypass_stop and irq_bypass_start are not needed and so
798 * kvm_ops are not defined for them.
799 */
800bool kvm_arch_has_irq_bypass(void)
801{
802 return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
803 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
804}
805
806int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
807 struct irq_bypass_producer *prod)
808{
809 struct kvm_kernel_irqfd *irqfd =
810 container_of(cons, struct kvm_kernel_irqfd, consumer);
811 struct kvm *kvm = irqfd->kvm;
812
813 if (kvm->arch.kvm_ops->irq_bypass_add_producer)
814 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
815
816 return 0;
817}
818
819void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
820 struct irq_bypass_producer *prod)
821{
822 struct kvm_kernel_irqfd *irqfd =
823 container_of(cons, struct kvm_kernel_irqfd, consumer);
824 struct kvm *kvm = irqfd->kvm;
825
826 if (kvm->arch.kvm_ops->irq_bypass_del_producer)
827 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
828}
829
830#ifdef CONFIG_VSX
831static inline int kvmppc_get_vsr_dword_offset(int index)
832{
833 int offset;
834
835 if ((index != 0) && (index != 1))
836 return -1;
837
838#ifdef __BIG_ENDIAN
839 offset = index;
840#else
841 offset = 1 - index;
842#endif
843
844 return offset;
845}
846
847static inline int kvmppc_get_vsr_word_offset(int index)
848{
849 int offset;
850
851 if ((index > 3) || (index < 0))
852 return -1;
853
854#ifdef __BIG_ENDIAN
855 offset = index;
856#else
857 offset = 3 - index;
858#endif
859 return offset;
860}
861
862static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
863 u64 gpr)
864{
865 union kvmppc_one_reg val;
866 int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
867 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
868
869 if (offset == -1)
870 return;
871
872 if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
873 val.vval = VCPU_VSX_VR(vcpu, index);
874 val.vsxval[offset] = gpr;
875 VCPU_VSX_VR(vcpu, index) = val.vval;
876 } else {
877 VCPU_VSX_FPR(vcpu, index, offset) = gpr;
878 }
879}
880
881static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
882 u64 gpr)
883{
884 union kvmppc_one_reg val;
885 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
886
887 if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
888 val.vval = VCPU_VSX_VR(vcpu, index);
889 val.vsxval[0] = gpr;
890 val.vsxval[1] = gpr;
891 VCPU_VSX_VR(vcpu, index) = val.vval;
892 } else {
893 VCPU_VSX_FPR(vcpu, index, 0) = gpr;
894 VCPU_VSX_FPR(vcpu, index, 1) = gpr;
895 }
896}
897
898static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
899 u32 gpr32)
900{
901 union kvmppc_one_reg val;
902 int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
903 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
904 int dword_offset, word_offset;
905
906 if (offset == -1)
907 return;
908
909 if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
910 val.vval = VCPU_VSX_VR(vcpu, index);
911 val.vsx32val[offset] = gpr32;
912 VCPU_VSX_VR(vcpu, index) = val.vval;
913 } else {
914 dword_offset = offset / 2;
915 word_offset = offset % 2;
916 val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
917 val.vsx32val[word_offset] = gpr32;
918 VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
919 }
920}
921#endif /* CONFIG_VSX */
922
923#ifdef CONFIG_PPC_FPU
924static inline u64 sp_to_dp(u32 fprs)
925{
926 u64 fprd;
927
928 preempt_disable();
929 enable_kernel_fp();
930 asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m" (fprd) : "m" (fprs)
931 : "fr0");
932 preempt_enable();
933 return fprd;
934}
935
936static inline u32 dp_to_sp(u64 fprd)
937{
938 u32 fprs;
939
940 preempt_disable();
941 enable_kernel_fp();
942 asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m" (fprs) : "m" (fprd)
943 : "fr0");
944 preempt_enable();
945 return fprs;
946}
947
948#else
949#define sp_to_dp(x) (x)
950#define dp_to_sp(x) (x)
951#endif /* CONFIG_PPC_FPU */
952
953static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
954 struct kvm_run *run)
955{
956 u64 uninitialized_var(gpr);
957
958 if (run->mmio.len > sizeof(gpr)) {
959 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
960 return;
961 }
962
963 if (!vcpu->arch.mmio_host_swabbed) {
964 switch (run->mmio.len) {
965 case 8: gpr = *(u64 *)run->mmio.data; break;
966 case 4: gpr = *(u32 *)run->mmio.data; break;
967 case 2: gpr = *(u16 *)run->mmio.data; break;
968 case 1: gpr = *(u8 *)run->mmio.data; break;
969 }
970 } else {
971 switch (run->mmio.len) {
972 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
973 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
974 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
975 case 1: gpr = *(u8 *)run->mmio.data; break;
976 }
977 }
978
979 /* conversion between single and double precision */
980 if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
981 gpr = sp_to_dp(gpr);
982
983 if (vcpu->arch.mmio_sign_extend) {
984 switch (run->mmio.len) {
985#ifdef CONFIG_PPC64
986 case 4:
987 gpr = (s64)(s32)gpr;
988 break;
989#endif
990 case 2:
991 gpr = (s64)(s16)gpr;
992 break;
993 case 1:
994 gpr = (s64)(s8)gpr;
995 break;
996 }
997 }
998
999 switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1000 case KVM_MMIO_REG_GPR:
1001 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1002 break;
1003 case KVM_MMIO_REG_FPR:
1004 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1005 break;
1006#ifdef CONFIG_PPC_BOOK3S
1007 case KVM_MMIO_REG_QPR:
1008 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1009 break;
1010 case KVM_MMIO_REG_FQPR:
1011 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1012 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1013 break;
1014#endif
1015#ifdef CONFIG_VSX
1016 case KVM_MMIO_REG_VSX:
1017 if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_DWORD)
1018 kvmppc_set_vsr_dword(vcpu, gpr);
1019 else if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_WORD)
1020 kvmppc_set_vsr_word(vcpu, gpr);
1021 else if (vcpu->arch.mmio_vsx_copy_type ==
1022 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1023 kvmppc_set_vsr_dword_dump(vcpu, gpr);
1024 break;
1025#endif
1026 default:
1027 BUG();
1028 }
1029}
1030
1031static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1032 unsigned int rt, unsigned int bytes,
1033 int is_default_endian, int sign_extend)
1034{
1035 int idx, ret;
1036 bool host_swabbed;
1037
1038 /* Pity C doesn't have a logical XOR operator */
1039 if (kvmppc_need_byteswap(vcpu)) {
1040 host_swabbed = is_default_endian;
1041 } else {
1042 host_swabbed = !is_default_endian;
1043 }
1044
1045 if (bytes > sizeof(run->mmio.data)) {
1046 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1047 run->mmio.len);
1048 }
1049
1050 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1051 run->mmio.len = bytes;
1052 run->mmio.is_write = 0;
1053
1054 vcpu->arch.io_gpr = rt;
1055 vcpu->arch.mmio_host_swabbed = host_swabbed;
1056 vcpu->mmio_needed = 1;
1057 vcpu->mmio_is_write = 0;
1058 vcpu->arch.mmio_sign_extend = sign_extend;
1059
1060 idx = srcu_read_lock(&vcpu->kvm->srcu);
1061
1062 ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1063 bytes, &run->mmio.data);
1064
1065 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1066
1067 if (!ret) {
1068 kvmppc_complete_mmio_load(vcpu, run);
1069 vcpu->mmio_needed = 0;
1070 return EMULATE_DONE;
1071 }
1072
1073 return EMULATE_DO_MMIO;
1074}
1075
1076int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1077 unsigned int rt, unsigned int bytes,
1078 int is_default_endian)
1079{
1080 return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0);
1081}
1082EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1083
1084/* Same as above, but sign extends */
1085int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
1086 unsigned int rt, unsigned int bytes,
1087 int is_default_endian)
1088{
1089 return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
1090}
1091
1092#ifdef CONFIG_VSX
1093int kvmppc_handle_vsx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1094 unsigned int rt, unsigned int bytes,
1095 int is_default_endian, int mmio_sign_extend)
1096{
1097 enum emulation_result emulated = EMULATE_DONE;
1098
1099 /* Currently, mmio_vsx_copy_nums only allowed to be less than 4 */
1100 if ( (vcpu->arch.mmio_vsx_copy_nums > 4) ||
1101 (vcpu->arch.mmio_vsx_copy_nums < 0) ) {
1102 return EMULATE_FAIL;
1103 }
1104
1105 while (vcpu->arch.mmio_vsx_copy_nums) {
1106 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1107 is_default_endian, mmio_sign_extend);
1108
1109 if (emulated != EMULATE_DONE)
1110 break;
1111
1112 vcpu->arch.paddr_accessed += run->mmio.len;
1113
1114 vcpu->arch.mmio_vsx_copy_nums--;
1115 vcpu->arch.mmio_vsx_offset++;
1116 }
1117 return emulated;
1118}
1119#endif /* CONFIG_VSX */
1120
1121int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1122 u64 val, unsigned int bytes, int is_default_endian)
1123{
1124 void *data = run->mmio.data;
1125 int idx, ret;
1126 bool host_swabbed;
1127
1128 /* Pity C doesn't have a logical XOR operator */
1129 if (kvmppc_need_byteswap(vcpu)) {
1130 host_swabbed = is_default_endian;
1131 } else {
1132 host_swabbed = !is_default_endian;
1133 }
1134
1135 if (bytes > sizeof(run->mmio.data)) {
1136 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1137 run->mmio.len);
1138 }
1139
1140 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1141 run->mmio.len = bytes;
1142 run->mmio.is_write = 1;
1143 vcpu->mmio_needed = 1;
1144 vcpu->mmio_is_write = 1;
1145
1146 if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1147 val = dp_to_sp(val);
1148
1149 /* Store the value at the lowest bytes in 'data'. */
1150 if (!host_swabbed) {
1151 switch (bytes) {
1152 case 8: *(u64 *)data = val; break;
1153 case 4: *(u32 *)data = val; break;
1154 case 2: *(u16 *)data = val; break;
1155 case 1: *(u8 *)data = val; break;
1156 }
1157 } else {
1158 switch (bytes) {
1159 case 8: *(u64 *)data = swab64(val); break;
1160 case 4: *(u32 *)data = swab32(val); break;
1161 case 2: *(u16 *)data = swab16(val); break;
1162 case 1: *(u8 *)data = val; break;
1163 }
1164 }
1165
1166 idx = srcu_read_lock(&vcpu->kvm->srcu);
1167
1168 ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1169 bytes, &run->mmio.data);
1170
1171 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1172
1173 if (!ret) {
1174 vcpu->mmio_needed = 0;
1175 return EMULATE_DONE;
1176 }
1177
1178 return EMULATE_DO_MMIO;
1179}
1180EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1181
1182#ifdef CONFIG_VSX
1183static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1184{
1185 u32 dword_offset, word_offset;
1186 union kvmppc_one_reg reg;
1187 int vsx_offset = 0;
1188 int copy_type = vcpu->arch.mmio_vsx_copy_type;
1189 int result = 0;
1190
1191 switch (copy_type) {
1192 case KVMPPC_VSX_COPY_DWORD:
1193 vsx_offset =
1194 kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1195
1196 if (vsx_offset == -1) {
1197 result = -1;
1198 break;
1199 }
1200
1201 if (!vcpu->arch.mmio_vsx_tx_sx_enabled) {
1202 *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
1203 } else {
1204 reg.vval = VCPU_VSX_VR(vcpu, rs);
1205 *val = reg.vsxval[vsx_offset];
1206 }
1207 break;
1208
1209 case KVMPPC_VSX_COPY_WORD:
1210 vsx_offset =
1211 kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1212
1213 if (vsx_offset == -1) {
1214 result = -1;
1215 break;
1216 }
1217
1218 if (!vcpu->arch.mmio_vsx_tx_sx_enabled) {
1219 dword_offset = vsx_offset / 2;
1220 word_offset = vsx_offset % 2;
1221 reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
1222 *val = reg.vsx32val[word_offset];
1223 } else {
1224 reg.vval = VCPU_VSX_VR(vcpu, rs);
1225 *val = reg.vsx32val[vsx_offset];
1226 }
1227 break;
1228
1229 default:
1230 result = -1;
1231 break;
1232 }
1233
1234 return result;
1235}
1236
1237int kvmppc_handle_vsx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1238 int rs, unsigned int bytes, int is_default_endian)
1239{
1240 u64 val;
1241 enum emulation_result emulated = EMULATE_DONE;
1242
1243 vcpu->arch.io_gpr = rs;
1244
1245 /* Currently, mmio_vsx_copy_nums only allowed to be less than 4 */
1246 if ( (vcpu->arch.mmio_vsx_copy_nums > 4) ||
1247 (vcpu->arch.mmio_vsx_copy_nums < 0) ) {
1248 return EMULATE_FAIL;
1249 }
1250
1251 while (vcpu->arch.mmio_vsx_copy_nums) {
1252 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1253 return EMULATE_FAIL;
1254
1255 emulated = kvmppc_handle_store(run, vcpu,
1256 val, bytes, is_default_endian);
1257
1258 if (emulated != EMULATE_DONE)
1259 break;
1260
1261 vcpu->arch.paddr_accessed += run->mmio.len;
1262
1263 vcpu->arch.mmio_vsx_copy_nums--;
1264 vcpu->arch.mmio_vsx_offset++;
1265 }
1266
1267 return emulated;
1268}
1269
1270static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu,
1271 struct kvm_run *run)
1272{
1273 enum emulation_result emulated = EMULATE_FAIL;
1274 int r;
1275
1276 vcpu->arch.paddr_accessed += run->mmio.len;
1277
1278 if (!vcpu->mmio_is_write) {
1279 emulated = kvmppc_handle_vsx_load(run, vcpu, vcpu->arch.io_gpr,
1280 run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1281 } else {
1282 emulated = kvmppc_handle_vsx_store(run, vcpu,
1283 vcpu->arch.io_gpr, run->mmio.len, 1);
1284 }
1285
1286 switch (emulated) {
1287 case EMULATE_DO_MMIO:
1288 run->exit_reason = KVM_EXIT_MMIO;
1289 r = RESUME_HOST;
1290 break;
1291 case EMULATE_FAIL:
1292 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1293 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1294 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1295 r = RESUME_HOST;
1296 break;
1297 default:
1298 r = RESUME_GUEST;
1299 break;
1300 }
1301 return r;
1302}
1303#endif /* CONFIG_VSX */
1304
1305int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1306{
1307 int r = 0;
1308 union kvmppc_one_reg val;
1309 int size;
1310
1311 size = one_reg_size(reg->id);
1312 if (size > sizeof(val))
1313 return -EINVAL;
1314
1315 r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1316 if (r == -EINVAL) {
1317 r = 0;
1318 switch (reg->id) {
1319#ifdef CONFIG_ALTIVEC
1320 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1321 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1322 r = -ENXIO;
1323 break;
1324 }
1325 val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1326 break;
1327 case KVM_REG_PPC_VSCR:
1328 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1329 r = -ENXIO;
1330 break;
1331 }
1332 val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1333 break;
1334 case KVM_REG_PPC_VRSAVE:
1335 val = get_reg_val(reg->id, vcpu->arch.vrsave);
1336 break;
1337#endif /* CONFIG_ALTIVEC */
1338 default:
1339 r = -EINVAL;
1340 break;
1341 }
1342 }
1343
1344 if (r)
1345 return r;
1346
1347 if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1348 r = -EFAULT;
1349
1350 return r;
1351}
1352
1353int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1354{
1355 int r;
1356 union kvmppc_one_reg val;
1357 int size;
1358
1359 size = one_reg_size(reg->id);
1360 if (size > sizeof(val))
1361 return -EINVAL;
1362
1363 if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1364 return -EFAULT;
1365
1366 r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1367 if (r == -EINVAL) {
1368 r = 0;
1369 switch (reg->id) {
1370#ifdef CONFIG_ALTIVEC
1371 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1372 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1373 r = -ENXIO;
1374 break;
1375 }
1376 vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1377 break;
1378 case KVM_REG_PPC_VSCR:
1379 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1380 r = -ENXIO;
1381 break;
1382 }
1383 vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1384 break;
1385 case KVM_REG_PPC_VRSAVE:
1386 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1387 r = -ENXIO;
1388 break;
1389 }
1390 vcpu->arch.vrsave = set_reg_val(reg->id, val);
1391 break;
1392#endif /* CONFIG_ALTIVEC */
1393 default:
1394 r = -EINVAL;
1395 break;
1396 }
1397 }
1398
1399 return r;
1400}
1401
1402int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
1403{
1404 int r;
1405 sigset_t sigsaved;
1406
1407 if (vcpu->mmio_needed) {
1408 vcpu->mmio_needed = 0;
1409 if (!vcpu->mmio_is_write)
1410 kvmppc_complete_mmio_load(vcpu, run);
1411#ifdef CONFIG_VSX
1412 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1413 vcpu->arch.mmio_vsx_copy_nums--;
1414 vcpu->arch.mmio_vsx_offset++;
1415 }
1416
1417 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1418 r = kvmppc_emulate_mmio_vsx_loadstore(vcpu, run);
1419 if (r == RESUME_HOST) {
1420 vcpu->mmio_needed = 1;
1421 return r;
1422 }
1423 }
1424#endif
1425 } else if (vcpu->arch.osi_needed) {
1426 u64 *gprs = run->osi.gprs;
1427 int i;
1428
1429 for (i = 0; i < 32; i++)
1430 kvmppc_set_gpr(vcpu, i, gprs[i]);
1431 vcpu->arch.osi_needed = 0;
1432 } else if (vcpu->arch.hcall_needed) {
1433 int i;
1434
1435 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1436 for (i = 0; i < 9; ++i)
1437 kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1438 vcpu->arch.hcall_needed = 0;
1439#ifdef CONFIG_BOOKE
1440 } else if (vcpu->arch.epr_needed) {
1441 kvmppc_set_epr(vcpu, run->epr.epr);
1442 vcpu->arch.epr_needed = 0;
1443#endif
1444 }
1445
1446 if (vcpu->sigset_active)
1447 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
1448
1449 if (run->immediate_exit)
1450 r = -EINTR;
1451 else
1452 r = kvmppc_vcpu_run(run, vcpu);
1453
1454 if (vcpu->sigset_active)
1455 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1456
1457 return r;
1458}
1459
1460int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1461{
1462 if (irq->irq == KVM_INTERRUPT_UNSET) {
1463 kvmppc_core_dequeue_external(vcpu);
1464 return 0;
1465 }
1466
1467 kvmppc_core_queue_external(vcpu, irq);
1468
1469 kvm_vcpu_kick(vcpu);
1470
1471 return 0;
1472}
1473
1474static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1475 struct kvm_enable_cap *cap)
1476{
1477 int r;
1478
1479 if (cap->flags)
1480 return -EINVAL;
1481
1482 switch (cap->cap) {
1483 case KVM_CAP_PPC_OSI:
1484 r = 0;
1485 vcpu->arch.osi_enabled = true;
1486 break;
1487 case KVM_CAP_PPC_PAPR:
1488 r = 0;
1489 vcpu->arch.papr_enabled = true;
1490 break;
1491 case KVM_CAP_PPC_EPR:
1492 r = 0;
1493 if (cap->args[0])
1494 vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1495 else
1496 vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1497 break;
1498#ifdef CONFIG_BOOKE
1499 case KVM_CAP_PPC_BOOKE_WATCHDOG:
1500 r = 0;
1501 vcpu->arch.watchdog_enabled = true;
1502 break;
1503#endif
1504#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1505 case KVM_CAP_SW_TLB: {
1506 struct kvm_config_tlb cfg;
1507 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1508
1509 r = -EFAULT;
1510 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1511 break;
1512
1513 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1514 break;
1515 }
1516#endif
1517#ifdef CONFIG_KVM_MPIC
1518 case KVM_CAP_IRQ_MPIC: {
1519 struct fd f;
1520 struct kvm_device *dev;
1521
1522 r = -EBADF;
1523 f = fdget(cap->args[0]);
1524 if (!f.file)
1525 break;
1526
1527 r = -EPERM;
1528 dev = kvm_device_from_filp(f.file);
1529 if (dev)
1530 r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1531
1532 fdput(f);
1533 break;
1534 }
1535#endif
1536#ifdef CONFIG_KVM_XICS
1537 case KVM_CAP_IRQ_XICS: {
1538 struct fd f;
1539 struct kvm_device *dev;
1540
1541 r = -EBADF;
1542 f = fdget(cap->args[0]);
1543 if (!f.file)
1544 break;
1545
1546 r = -EPERM;
1547 dev = kvm_device_from_filp(f.file);
1548 if (dev) {
1549 if (xive_enabled())
1550 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1551 else
1552 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1553 }
1554
1555 fdput(f);
1556 break;
1557 }
1558#endif /* CONFIG_KVM_XICS */
1559#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1560 case KVM_CAP_PPC_FWNMI:
1561 r = -EINVAL;
1562 if (!is_kvmppc_hv_enabled(vcpu->kvm))
1563 break;
1564 r = 0;
1565 vcpu->kvm->arch.fwnmi_enabled = true;
1566 break;
1567#endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
1568 default:
1569 r = -EINVAL;
1570 break;
1571 }
1572
1573 if (!r)
1574 r = kvmppc_sanity_check(vcpu);
1575
1576 return r;
1577}
1578
1579bool kvm_arch_intc_initialized(struct kvm *kvm)
1580{
1581#ifdef CONFIG_KVM_MPIC
1582 if (kvm->arch.mpic)
1583 return true;
1584#endif
1585#ifdef CONFIG_KVM_XICS
1586 if (kvm->arch.xics || kvm->arch.xive)
1587 return true;
1588#endif
1589 return false;
1590}
1591
1592int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1593 struct kvm_mp_state *mp_state)
1594{
1595 return -EINVAL;
1596}
1597
1598int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1599 struct kvm_mp_state *mp_state)
1600{
1601 return -EINVAL;
1602}
1603
1604long kvm_arch_vcpu_ioctl(struct file *filp,
1605 unsigned int ioctl, unsigned long arg)
1606{
1607 struct kvm_vcpu *vcpu = filp->private_data;
1608 void __user *argp = (void __user *)arg;
1609 long r;
1610
1611 switch (ioctl) {
1612 case KVM_INTERRUPT: {
1613 struct kvm_interrupt irq;
1614 r = -EFAULT;
1615 if (copy_from_user(&irq, argp, sizeof(irq)))
1616 goto out;
1617 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1618 goto out;
1619 }
1620
1621 case KVM_ENABLE_CAP:
1622 {
1623 struct kvm_enable_cap cap;
1624 r = -EFAULT;
1625 if (copy_from_user(&cap, argp, sizeof(cap)))
1626 goto out;
1627 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1628 break;
1629 }
1630
1631 case KVM_SET_ONE_REG:
1632 case KVM_GET_ONE_REG:
1633 {
1634 struct kvm_one_reg reg;
1635 r = -EFAULT;
1636 if (copy_from_user(&reg, argp, sizeof(reg)))
1637 goto out;
1638 if (ioctl == KVM_SET_ONE_REG)
1639 r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1640 else
1641 r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1642 break;
1643 }
1644
1645#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1646 case KVM_DIRTY_TLB: {
1647 struct kvm_dirty_tlb dirty;
1648 r = -EFAULT;
1649 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1650 goto out;
1651 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1652 break;
1653 }
1654#endif
1655 default:
1656 r = -EINVAL;
1657 }
1658
1659out:
1660 return r;
1661}
1662
1663int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1664{
1665 return VM_FAULT_SIGBUS;
1666}
1667
1668static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1669{
1670 u32 inst_nop = 0x60000000;
1671#ifdef CONFIG_KVM_BOOKE_HV
1672 u32 inst_sc1 = 0x44000022;
1673 pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1674 pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1675 pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1676 pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1677#else
1678 u32 inst_lis = 0x3c000000;
1679 u32 inst_ori = 0x60000000;
1680 u32 inst_sc = 0x44000002;
1681 u32 inst_imm_mask = 0xffff;
1682
1683 /*
1684 * The hypercall to get into KVM from within guest context is as
1685 * follows:
1686 *
1687 * lis r0, r0, KVM_SC_MAGIC_R0@h
1688 * ori r0, KVM_SC_MAGIC_R0@l
1689 * sc
1690 * nop
1691 */
1692 pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1693 pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1694 pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1695 pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1696#endif
1697
1698 pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1699
1700 return 0;
1701}
1702
1703int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1704 bool line_status)
1705{
1706 if (!irqchip_in_kernel(kvm))
1707 return -ENXIO;
1708
1709 irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1710 irq_event->irq, irq_event->level,
1711 line_status);
1712 return 0;
1713}
1714
1715
1716static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1717 struct kvm_enable_cap *cap)
1718{
1719 int r;
1720
1721 if (cap->flags)
1722 return -EINVAL;
1723
1724 switch (cap->cap) {
1725#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1726 case KVM_CAP_PPC_ENABLE_HCALL: {
1727 unsigned long hcall = cap->args[0];
1728
1729 r = -EINVAL;
1730 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1731 cap->args[1] > 1)
1732 break;
1733 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1734 break;
1735 if (cap->args[1])
1736 set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1737 else
1738 clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1739 r = 0;
1740 break;
1741 }
1742 case KVM_CAP_PPC_SMT: {
1743 unsigned long mode = cap->args[0];
1744 unsigned long flags = cap->args[1];
1745
1746 r = -EINVAL;
1747 if (kvm->arch.kvm_ops->set_smt_mode)
1748 r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
1749 break;
1750 }
1751#endif
1752 default:
1753 r = -EINVAL;
1754 break;
1755 }
1756
1757 return r;
1758}
1759
1760long kvm_arch_vm_ioctl(struct file *filp,
1761 unsigned int ioctl, unsigned long arg)
1762{
1763 struct kvm *kvm __maybe_unused = filp->private_data;
1764 void __user *argp = (void __user *)arg;
1765 long r;
1766
1767 switch (ioctl) {
1768 case KVM_PPC_GET_PVINFO: {
1769 struct kvm_ppc_pvinfo pvinfo;
1770 memset(&pvinfo, 0, sizeof(pvinfo));
1771 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1772 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1773 r = -EFAULT;
1774 goto out;
1775 }
1776
1777 break;
1778 }
1779 case KVM_ENABLE_CAP:
1780 {
1781 struct kvm_enable_cap cap;
1782 r = -EFAULT;
1783 if (copy_from_user(&cap, argp, sizeof(cap)))
1784 goto out;
1785 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1786 break;
1787 }
1788#ifdef CONFIG_SPAPR_TCE_IOMMU
1789 case KVM_CREATE_SPAPR_TCE_64: {
1790 struct kvm_create_spapr_tce_64 create_tce_64;
1791
1792 r = -EFAULT;
1793 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
1794 goto out;
1795 if (create_tce_64.flags) {
1796 r = -EINVAL;
1797 goto out;
1798 }
1799 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1800 goto out;
1801 }
1802 case KVM_CREATE_SPAPR_TCE: {
1803 struct kvm_create_spapr_tce create_tce;
1804 struct kvm_create_spapr_tce_64 create_tce_64;
1805
1806 r = -EFAULT;
1807 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1808 goto out;
1809
1810 create_tce_64.liobn = create_tce.liobn;
1811 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
1812 create_tce_64.offset = 0;
1813 create_tce_64.size = create_tce.window_size >>
1814 IOMMU_PAGE_SHIFT_4K;
1815 create_tce_64.flags = 0;
1816 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1817 goto out;
1818 }
1819#endif
1820#ifdef CONFIG_PPC_BOOK3S_64
1821 case KVM_PPC_GET_SMMU_INFO: {
1822 struct kvm_ppc_smmu_info info;
1823 struct kvm *kvm = filp->private_data;
1824
1825 memset(&info, 0, sizeof(info));
1826 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1827 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1828 r = -EFAULT;
1829 break;
1830 }
1831 case KVM_PPC_RTAS_DEFINE_TOKEN: {
1832 struct kvm *kvm = filp->private_data;
1833
1834 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1835 break;
1836 }
1837 case KVM_PPC_CONFIGURE_V3_MMU: {
1838 struct kvm *kvm = filp->private_data;
1839 struct kvm_ppc_mmuv3_cfg cfg;
1840
1841 r = -EINVAL;
1842 if (!kvm->arch.kvm_ops->configure_mmu)
1843 goto out;
1844 r = -EFAULT;
1845 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1846 goto out;
1847 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
1848 break;
1849 }
1850 case KVM_PPC_GET_RMMU_INFO: {
1851 struct kvm *kvm = filp->private_data;
1852 struct kvm_ppc_rmmu_info info;
1853
1854 r = -EINVAL;
1855 if (!kvm->arch.kvm_ops->get_rmmu_info)
1856 goto out;
1857 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
1858 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1859 r = -EFAULT;
1860 break;
1861 }
1862 default: {
1863 struct kvm *kvm = filp->private_data;
1864 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1865 }
1866#else /* CONFIG_PPC_BOOK3S_64 */
1867 default:
1868 r = -ENOTTY;
1869#endif
1870 }
1871out:
1872 return r;
1873}
1874
1875static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1876static unsigned long nr_lpids;
1877
1878long kvmppc_alloc_lpid(void)
1879{
1880 long lpid;
1881
1882 do {
1883 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1884 if (lpid >= nr_lpids) {
1885 pr_err("%s: No LPIDs free\n", __func__);
1886 return -ENOMEM;
1887 }
1888 } while (test_and_set_bit(lpid, lpid_inuse));
1889
1890 return lpid;
1891}
1892EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1893
1894void kvmppc_claim_lpid(long lpid)
1895{
1896 set_bit(lpid, lpid_inuse);
1897}
1898EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1899
1900void kvmppc_free_lpid(long lpid)
1901{
1902 clear_bit(lpid, lpid_inuse);
1903}
1904EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1905
1906void kvmppc_init_lpid(unsigned long nr_lpids_param)
1907{
1908 nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1909 memset(lpid_inuse, 0, sizeof(lpid_inuse));
1910}
1911EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1912
1913int kvm_arch_init(void *opaque)
1914{
1915 return 0;
1916}
1917
1918EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);
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