1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 *
4 * Copyright IBM Corp. 2007
5 *
6 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
7 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
8 */
9
10 #include <linux/errno.h>
11 #include <linux/err.h>
12 #include <linux/kvm_host.h>
13 #include <linux/vmalloc.h>
14 #include <linux/hrtimer.h>
15 #include <linux/sched/signal.h>
16 #include <linux/fs.h>
17 #include <linux/slab.h>
18 #include <linux/file.h>
19 #include <linux/module.h>
20 #include <linux/irqbypass.h>
21 #include <linux/kvm_irqfd.h>
22 #include <linux/of.h>
23 #include <asm/cputable.h>
24 #include <linux/uaccess.h>
25 #include <asm/kvm_ppc.h>
26 #include <asm/cputhreads.h>
27 #include <asm/irqflags.h>
28 #include <asm/iommu.h>
29 #include <asm/switch_to.h>
30 #include <asm/xive.h>
31 #ifdef CONFIG_PPC_PSERIES
32 #include <asm/hvcall.h>
33 #include <asm/plpar_wrappers.h>
34 #endif
35 #include <asm/ultravisor.h>
36 #include <asm/setup.h>
37
38 #include "timing.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
kvm_arch_vcpu_runnable(struct kvm_vcpu * v)50 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
51 {
52 return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
53 }
54
kvm_arch_dy_runnable(struct kvm_vcpu * vcpu)55 bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu)
56 {
57 return kvm_arch_vcpu_runnable(vcpu);
58 }
59
kvm_arch_vcpu_in_kernel(struct kvm_vcpu * vcpu)60 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
61 {
62 return false;
63 }
64
kvm_arch_vcpu_should_kick(struct kvm_vcpu * vcpu)65 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
66 {
67 return 1;
68 }
69
70 /*
71 * Common checks before entering the guest world. Call with interrupts
72 * enabled.
73 *
74 * returns:
75 *
76 * == 1 if we're ready to go into guest state
77 * <= 0 if we need to go back to the host with return value
78 */
kvmppc_prepare_to_enter(struct kvm_vcpu * vcpu)79 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
80 {
81 int r;
82
83 WARN_ON(irqs_disabled());
84 hard_irq_disable();
85
86 while (true) {
87 if (need_resched()) {
88 local_irq_enable();
89 cond_resched();
90 hard_irq_disable();
91 continue;
92 }
93
94 if (signal_pending(current)) {
95 kvmppc_account_exit(vcpu, SIGNAL_EXITS);
96 vcpu->run->exit_reason = KVM_EXIT_INTR;
97 r = -EINTR;
98 break;
99 }
100
101 vcpu->mode = IN_GUEST_MODE;
102
103 /*
104 * Reading vcpu->requests must happen after setting vcpu->mode,
105 * so we don't miss a request because the requester sees
106 * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
107 * before next entering the guest (and thus doesn't IPI).
108 * This also orders the write to mode from any reads
109 * to the page tables done while the VCPU is running.
110 * Please see the comment in kvm_flush_remote_tlbs.
111 */
112 smp_mb();
113
114 if (kvm_request_pending(vcpu)) {
115 /* Make sure we process requests preemptable */
116 local_irq_enable();
117 trace_kvm_check_requests(vcpu);
118 r = kvmppc_core_check_requests(vcpu);
119 hard_irq_disable();
120 if (r > 0)
121 continue;
122 break;
123 }
124
125 if (kvmppc_core_prepare_to_enter(vcpu)) {
126 /* interrupts got enabled in between, so we
127 are back at square 1 */
128 continue;
129 }
130
131 guest_enter_irqoff();
132 return 1;
133 }
134
135 /* return to host */
136 local_irq_enable();
137 return r;
138 }
139 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
140
141 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
kvmppc_swab_shared(struct kvm_vcpu * vcpu)142 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
143 {
144 struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
145 int i;
146
147 shared->sprg0 = swab64(shared->sprg0);
148 shared->sprg1 = swab64(shared->sprg1);
149 shared->sprg2 = swab64(shared->sprg2);
150 shared->sprg3 = swab64(shared->sprg3);
151 shared->srr0 = swab64(shared->srr0);
152 shared->srr1 = swab64(shared->srr1);
153 shared->dar = swab64(shared->dar);
154 shared->msr = swab64(shared->msr);
155 shared->dsisr = swab32(shared->dsisr);
156 shared->int_pending = swab32(shared->int_pending);
157 for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
158 shared->sr[i] = swab32(shared->sr[i]);
159 }
160 #endif
161
kvmppc_kvm_pv(struct kvm_vcpu * vcpu)162 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
163 {
164 int nr = kvmppc_get_gpr(vcpu, 11);
165 int r;
166 unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
167 unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
168 unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
169 unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
170 unsigned long r2 = 0;
171
172 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
173 /* 32 bit mode */
174 param1 &= 0xffffffff;
175 param2 &= 0xffffffff;
176 param3 &= 0xffffffff;
177 param4 &= 0xffffffff;
178 }
179
180 switch (nr) {
181 case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
182 {
183 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
184 /* Book3S can be little endian, find it out here */
185 int shared_big_endian = true;
186 if (vcpu->arch.intr_msr & MSR_LE)
187 shared_big_endian = false;
188 if (shared_big_endian != vcpu->arch.shared_big_endian)
189 kvmppc_swab_shared(vcpu);
190 vcpu->arch.shared_big_endian = shared_big_endian;
191 #endif
192
193 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
194 /*
195 * Older versions of the Linux magic page code had
196 * a bug where they would map their trampoline code
197 * NX. If that's the case, remove !PR NX capability.
198 */
199 vcpu->arch.disable_kernel_nx = true;
200 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
201 }
202
203 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
204 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
205
206 #ifdef CONFIG_PPC_64K_PAGES
207 /*
208 * Make sure our 4k magic page is in the same window of a 64k
209 * page within the guest and within the host's page.
210 */
211 if ((vcpu->arch.magic_page_pa & 0xf000) !=
212 ((ulong)vcpu->arch.shared & 0xf000)) {
213 void *old_shared = vcpu->arch.shared;
214 ulong shared = (ulong)vcpu->arch.shared;
215 void *new_shared;
216
217 shared &= PAGE_MASK;
218 shared |= vcpu->arch.magic_page_pa & 0xf000;
219 new_shared = (void*)shared;
220 memcpy(new_shared, old_shared, 0x1000);
221 vcpu->arch.shared = new_shared;
222 }
223 #endif
224
225 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
226
227 r = EV_SUCCESS;
228 break;
229 }
230 case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
231 r = EV_SUCCESS;
232 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
233 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
234 #endif
235
236 /* Second return value is in r4 */
237 break;
238 case EV_HCALL_TOKEN(EV_IDLE):
239 r = EV_SUCCESS;
240 kvm_vcpu_halt(vcpu);
241 break;
242 default:
243 r = EV_UNIMPLEMENTED;
244 break;
245 }
246
247 kvmppc_set_gpr(vcpu, 4, r2);
248
249 return r;
250 }
251 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
252
kvmppc_sanity_check(struct kvm_vcpu * vcpu)253 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
254 {
255 int r = false;
256
257 /* We have to know what CPU to virtualize */
258 if (!vcpu->arch.pvr)
259 goto out;
260
261 /* PAPR only works with book3s_64 */
262 if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
263 goto out;
264
265 /* HV KVM can only do PAPR mode for now */
266 if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
267 goto out;
268
269 #ifdef CONFIG_KVM_BOOKE_HV
270 if (!cpu_has_feature(CPU_FTR_EMB_HV))
271 goto out;
272 #endif
273
274 r = true;
275
276 out:
277 vcpu->arch.sane = r;
278 return r ? 0 : -EINVAL;
279 }
280 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
281
kvmppc_emulate_mmio(struct kvm_vcpu * vcpu)282 int kvmppc_emulate_mmio(struct kvm_vcpu *vcpu)
283 {
284 enum emulation_result er;
285 int r;
286
287 er = kvmppc_emulate_loadstore(vcpu);
288 switch (er) {
289 case EMULATE_DONE:
290 /* Future optimization: only reload non-volatiles if they were
291 * actually modified. */
292 r = RESUME_GUEST_NV;
293 break;
294 case EMULATE_AGAIN:
295 r = RESUME_GUEST;
296 break;
297 case EMULATE_DO_MMIO:
298 vcpu->run->exit_reason = KVM_EXIT_MMIO;
299 /* We must reload nonvolatiles because "update" load/store
300 * instructions modify register state. */
301 /* Future optimization: only reload non-volatiles if they were
302 * actually modified. */
303 r = RESUME_HOST_NV;
304 break;
305 case EMULATE_FAIL:
306 {
307 ppc_inst_t last_inst;
308
309 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
310 kvm_debug_ratelimited("Guest access to device memory using unsupported instruction (opcode: %#08x)\n",
311 ppc_inst_val(last_inst));
312
313 /*
314 * Injecting a Data Storage here is a bit more
315 * accurate since the instruction that caused the
316 * access could still be a valid one.
317 */
318 if (!IS_ENABLED(CONFIG_BOOKE)) {
319 ulong dsisr = DSISR_BADACCESS;
320
321 if (vcpu->mmio_is_write)
322 dsisr |= DSISR_ISSTORE;
323
324 kvmppc_core_queue_data_storage(vcpu,
325 kvmppc_get_msr(vcpu) & SRR1_PREFIXED,
326 vcpu->arch.vaddr_accessed, dsisr);
327 } else {
328 /*
329 * BookE does not send a SIGBUS on a bad
330 * fault, so use a Program interrupt instead
331 * to avoid a fault loop.
332 */
333 kvmppc_core_queue_program(vcpu, 0);
334 }
335
336 r = RESUME_GUEST;
337 break;
338 }
339 default:
340 WARN_ON(1);
341 r = RESUME_GUEST;
342 }
343
344 return r;
345 }
346 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
347
kvmppc_st(struct kvm_vcpu * vcpu,ulong * eaddr,int size,void * ptr,bool data)348 int kvmppc_st(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 r = -EINVAL;
354
355 vcpu->stat.st++;
356
357 if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->store_to_eaddr)
358 r = vcpu->kvm->arch.kvm_ops->store_to_eaddr(vcpu, eaddr, ptr,
359 size);
360
361 if ((!r) || (r == -EAGAIN))
362 return r;
363
364 r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
365 XLATE_WRITE, &pte);
366 if (r < 0)
367 return r;
368
369 *eaddr = pte.raddr;
370
371 if (!pte.may_write)
372 return -EPERM;
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(magic, ptr, size);
381 return EMULATE_DONE;
382 }
383
384 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
385 return EMULATE_DO_MMIO;
386
387 return EMULATE_DONE;
388 }
389 EXPORT_SYMBOL_GPL(kvmppc_st);
390
kvmppc_ld(struct kvm_vcpu * vcpu,ulong * eaddr,int size,void * ptr,bool data)391 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
392 bool data)
393 {
394 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
395 struct kvmppc_pte pte;
396 int rc = -EINVAL;
397
398 vcpu->stat.ld++;
399
400 if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->load_from_eaddr)
401 rc = vcpu->kvm->arch.kvm_ops->load_from_eaddr(vcpu, eaddr, ptr,
402 size);
403
404 if ((!rc) || (rc == -EAGAIN))
405 return rc;
406
407 rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
408 XLATE_READ, &pte);
409 if (rc)
410 return rc;
411
412 *eaddr = pte.raddr;
413
414 if (!pte.may_read)
415 return -EPERM;
416
417 if (!data && !pte.may_execute)
418 return -ENOEXEC;
419
420 /* Magic page override */
421 if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
422 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
423 !(kvmppc_get_msr(vcpu) & MSR_PR)) {
424 void *magic = vcpu->arch.shared;
425 magic += pte.eaddr & 0xfff;
426 memcpy(ptr, magic, size);
427 return EMULATE_DONE;
428 }
429
430 kvm_vcpu_srcu_read_lock(vcpu);
431 rc = kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size);
432 kvm_vcpu_srcu_read_unlock(vcpu);
433 if (rc)
434 return EMULATE_DO_MMIO;
435
436 return EMULATE_DONE;
437 }
438 EXPORT_SYMBOL_GPL(kvmppc_ld);
439
kvm_arch_init_vm(struct kvm * kvm,unsigned long type)440 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
441 {
442 struct kvmppc_ops *kvm_ops = NULL;
443 int r;
444
445 /*
446 * if we have both HV and PR enabled, default is HV
447 */
448 if (type == 0) {
449 if (kvmppc_hv_ops)
450 kvm_ops = kvmppc_hv_ops;
451 else
452 kvm_ops = kvmppc_pr_ops;
453 if (!kvm_ops)
454 goto err_out;
455 } else if (type == KVM_VM_PPC_HV) {
456 if (!kvmppc_hv_ops)
457 goto err_out;
458 kvm_ops = kvmppc_hv_ops;
459 } else if (type == KVM_VM_PPC_PR) {
460 if (!kvmppc_pr_ops)
461 goto err_out;
462 kvm_ops = kvmppc_pr_ops;
463 } else
464 goto err_out;
465
466 if (!try_module_get(kvm_ops->owner))
467 return -ENOENT;
468
469 kvm->arch.kvm_ops = kvm_ops;
470 r = kvmppc_core_init_vm(kvm);
471 if (r)
472 module_put(kvm_ops->owner);
473 return r;
474 err_out:
475 return -EINVAL;
476 }
477
kvm_arch_destroy_vm(struct kvm * kvm)478 void kvm_arch_destroy_vm(struct kvm *kvm)
479 {
480 #ifdef CONFIG_KVM_XICS
481 /*
482 * We call kick_all_cpus_sync() to ensure that all
483 * CPUs have executed any pending IPIs before we
484 * continue and free VCPUs structures below.
485 */
486 if (is_kvmppc_hv_enabled(kvm))
487 kick_all_cpus_sync();
488 #endif
489
490 kvm_destroy_vcpus(kvm);
491
492 mutex_lock(&kvm->lock);
493
494 kvmppc_core_destroy_vm(kvm);
495
496 mutex_unlock(&kvm->lock);
497
498 /* drop the module reference */
499 module_put(kvm->arch.kvm_ops->owner);
500 }
501
kvm_vm_ioctl_check_extension(struct kvm * kvm,long ext)502 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
503 {
504 int r;
505 /* Assume we're using HV mode when the HV module is loaded */
506 int hv_enabled = kvmppc_hv_ops ? 1 : 0;
507
508 if (kvm) {
509 /*
510 * Hooray - we know which VM type we're running on. Depend on
511 * that rather than the guess above.
512 */
513 hv_enabled = is_kvmppc_hv_enabled(kvm);
514 }
515
516 switch (ext) {
517 #ifdef CONFIG_BOOKE
518 case KVM_CAP_PPC_BOOKE_SREGS:
519 case KVM_CAP_PPC_BOOKE_WATCHDOG:
520 case KVM_CAP_PPC_EPR:
521 #else
522 case KVM_CAP_PPC_SEGSTATE:
523 case KVM_CAP_PPC_HIOR:
524 case KVM_CAP_PPC_PAPR:
525 #endif
526 case KVM_CAP_PPC_UNSET_IRQ:
527 case KVM_CAP_PPC_IRQ_LEVEL:
528 case KVM_CAP_ENABLE_CAP:
529 case KVM_CAP_ONE_REG:
530 case KVM_CAP_IOEVENTFD:
531 case KVM_CAP_IMMEDIATE_EXIT:
532 case KVM_CAP_SET_GUEST_DEBUG:
533 r = 1;
534 break;
535 case KVM_CAP_PPC_GUEST_DEBUG_SSTEP:
536 case KVM_CAP_PPC_PAIRED_SINGLES:
537 case KVM_CAP_PPC_OSI:
538 case KVM_CAP_PPC_GET_PVINFO:
539 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
540 case KVM_CAP_SW_TLB:
541 #endif
542 /* We support this only for PR */
543 r = !hv_enabled;
544 break;
545 #ifdef CONFIG_KVM_MPIC
546 case KVM_CAP_IRQ_MPIC:
547 r = 1;
548 break;
549 #endif
550
551 #ifdef CONFIG_PPC_BOOK3S_64
552 case KVM_CAP_SPAPR_TCE:
553 fallthrough;
554 case KVM_CAP_SPAPR_TCE_64:
555 case KVM_CAP_SPAPR_TCE_VFIO:
556 case KVM_CAP_PPC_RTAS:
557 case KVM_CAP_PPC_FIXUP_HCALL:
558 case KVM_CAP_PPC_ENABLE_HCALL:
559 #ifdef CONFIG_KVM_XICS
560 case KVM_CAP_IRQ_XICS:
561 #endif
562 case KVM_CAP_PPC_GET_CPU_CHAR:
563 r = 1;
564 break;
565 #ifdef CONFIG_KVM_XIVE
566 case KVM_CAP_PPC_IRQ_XIVE:
567 /*
568 * We need XIVE to be enabled on the platform (implies
569 * a POWER9 processor) and the PowerNV platform, as
570 * nested is not yet supported.
571 */
572 r = xive_enabled() && !!cpu_has_feature(CPU_FTR_HVMODE) &&
573 kvmppc_xive_native_supported();
574 break;
575 #endif
576
577 #ifdef CONFIG_HAVE_KVM_IRQCHIP
578 case KVM_CAP_IRQFD_RESAMPLE:
579 r = !xive_enabled();
580 break;
581 #endif
582
583 case KVM_CAP_PPC_ALLOC_HTAB:
584 r = hv_enabled;
585 break;
586 #endif /* CONFIG_PPC_BOOK3S_64 */
587 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
588 case KVM_CAP_PPC_SMT:
589 r = 0;
590 if (kvm) {
591 if (kvm->arch.emul_smt_mode > 1)
592 r = kvm->arch.emul_smt_mode;
593 else
594 r = kvm->arch.smt_mode;
595 } else if (hv_enabled) {
596 if (cpu_has_feature(CPU_FTR_ARCH_300))
597 r = 1;
598 else
599 r = threads_per_subcore;
600 }
601 break;
602 case KVM_CAP_PPC_SMT_POSSIBLE:
603 r = 1;
604 if (hv_enabled) {
605 if (!cpu_has_feature(CPU_FTR_ARCH_300))
606 r = ((threads_per_subcore << 1) - 1);
607 else
608 /* P9 can emulate dbells, so allow any mode */
609 r = 8 | 4 | 2 | 1;
610 }
611 break;
612 case KVM_CAP_PPC_HWRNG:
613 r = kvmppc_hwrng_present();
614 break;
615 case KVM_CAP_PPC_MMU_RADIX:
616 r = !!(hv_enabled && radix_enabled());
617 break;
618 case KVM_CAP_PPC_MMU_HASH_V3:
619 r = !!(hv_enabled && kvmppc_hv_ops->hash_v3_possible &&
620 kvmppc_hv_ops->hash_v3_possible());
621 break;
622 case KVM_CAP_PPC_NESTED_HV:
623 r = !!(hv_enabled && kvmppc_hv_ops->enable_nested &&
624 !kvmppc_hv_ops->enable_nested(NULL));
625 break;
626 case KVM_CAP_PPC_HTAB_FD:
627 r = hv_enabled;
628 break;
629 #endif
630 case KVM_CAP_NR_VCPUS:
631 /*
632 * Recommending a number of CPUs is somewhat arbitrary; we
633 * return the number of present CPUs for -HV (since a host
634 * will have secondary threads "offline"), and for other KVM
635 * implementations just count online CPUs.
636 */
637 if (hv_enabled)
638 r = min_t(unsigned int, num_present_cpus(), KVM_MAX_VCPUS);
639 else
640 r = min_t(unsigned int, num_online_cpus(), KVM_MAX_VCPUS);
641 break;
642 case KVM_CAP_MAX_VCPUS:
643 r = KVM_MAX_VCPUS;
644 break;
645 case KVM_CAP_MAX_VCPU_ID:
646 r = KVM_MAX_VCPU_IDS;
647 break;
648 #ifdef CONFIG_PPC_BOOK3S_64
649 case KVM_CAP_PPC_GET_SMMU_INFO:
650 r = 1;
651 break;
652 case KVM_CAP_SPAPR_MULTITCE:
653 r = 1;
654 break;
655 case KVM_CAP_SPAPR_RESIZE_HPT:
656 r = !!hv_enabled;
657 break;
658 #endif
659 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
660 case KVM_CAP_PPC_FWNMI:
661 r = hv_enabled;
662 break;
663 #endif
664 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
665 case KVM_CAP_PPC_HTM:
666 r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
667 (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
668 break;
669 #endif
670 #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
671 case KVM_CAP_PPC_SECURE_GUEST:
672 r = hv_enabled && kvmppc_hv_ops->enable_svm &&
673 !kvmppc_hv_ops->enable_svm(NULL);
674 break;
675 case KVM_CAP_PPC_DAWR1:
676 r = !!(hv_enabled && kvmppc_hv_ops->enable_dawr1 &&
677 !kvmppc_hv_ops->enable_dawr1(NULL));
678 break;
679 case KVM_CAP_PPC_RPT_INVALIDATE:
680 r = 1;
681 break;
682 #endif
683 case KVM_CAP_PPC_AIL_MODE_3:
684 r = 0;
685 /*
686 * KVM PR, POWER7, and some POWER9s don't support AIL=3 mode.
687 * The POWER9s can support it if the guest runs in hash mode,
688 * but QEMU doesn't necessarily query the capability in time.
689 */
690 if (hv_enabled) {
691 if (kvmhv_on_pseries()) {
692 if (pseries_reloc_on_exception())
693 r = 1;
694 } else if (cpu_has_feature(CPU_FTR_ARCH_207S) &&
695 !cpu_has_feature(CPU_FTR_P9_RADIX_PREFETCH_BUG)) {
696 r = 1;
697 }
698 }
699 break;
700 default:
701 r = 0;
702 break;
703 }
704 return r;
705
706 }
707
kvm_arch_dev_ioctl(struct file * filp,unsigned int ioctl,unsigned long arg)708 long kvm_arch_dev_ioctl(struct file *filp,
709 unsigned int ioctl, unsigned long arg)
710 {
711 return -EINVAL;
712 }
713
kvm_arch_free_memslot(struct kvm * kvm,struct kvm_memory_slot * slot)714 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
715 {
716 kvmppc_core_free_memslot(kvm, slot);
717 }
718
kvm_arch_prepare_memory_region(struct kvm * kvm,const struct kvm_memory_slot * old,struct kvm_memory_slot * new,enum kvm_mr_change change)719 int kvm_arch_prepare_memory_region(struct kvm *kvm,
720 const struct kvm_memory_slot *old,
721 struct kvm_memory_slot *new,
722 enum kvm_mr_change change)
723 {
724 return kvmppc_core_prepare_memory_region(kvm, old, new, change);
725 }
726
kvm_arch_commit_memory_region(struct kvm * kvm,struct kvm_memory_slot * old,const struct kvm_memory_slot * new,enum kvm_mr_change change)727 void kvm_arch_commit_memory_region(struct kvm *kvm,
728 struct kvm_memory_slot *old,
729 const struct kvm_memory_slot *new,
730 enum kvm_mr_change change)
731 {
732 kvmppc_core_commit_memory_region(kvm, old, new, change);
733 }
734
kvm_arch_flush_shadow_memslot(struct kvm * kvm,struct kvm_memory_slot * slot)735 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
736 struct kvm_memory_slot *slot)
737 {
738 kvmppc_core_flush_memslot(kvm, slot);
739 }
740
kvm_arch_vcpu_precreate(struct kvm * kvm,unsigned int id)741 int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
742 {
743 return 0;
744 }
745
kvmppc_decrementer_wakeup(struct hrtimer * timer)746 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
747 {
748 struct kvm_vcpu *vcpu;
749
750 vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
751 kvmppc_decrementer_func(vcpu);
752
753 return HRTIMER_NORESTART;
754 }
755
kvm_arch_vcpu_create(struct kvm_vcpu * vcpu)756 int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
757 {
758 int err;
759
760 hrtimer_setup(&vcpu->arch.dec_timer, kvmppc_decrementer_wakeup, CLOCK_REALTIME,
761 HRTIMER_MODE_ABS);
762
763 #ifdef CONFIG_KVM_EXIT_TIMING
764 mutex_init(&vcpu->arch.exit_timing_lock);
765 #endif
766 err = kvmppc_subarch_vcpu_init(vcpu);
767 if (err)
768 return err;
769
770 err = kvmppc_core_vcpu_create(vcpu);
771 if (err)
772 goto out_vcpu_uninit;
773
774 rcuwait_init(&vcpu->arch.wait);
775 vcpu->arch.waitp = &vcpu->arch.wait;
776 return 0;
777
778 out_vcpu_uninit:
779 kvmppc_subarch_vcpu_uninit(vcpu);
780 return err;
781 }
782
kvm_arch_vcpu_postcreate(struct kvm_vcpu * vcpu)783 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
784 {
785 }
786
kvm_arch_vcpu_destroy(struct kvm_vcpu * vcpu)787 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
788 {
789 /* Make sure we're not using the vcpu anymore */
790 hrtimer_cancel(&vcpu->arch.dec_timer);
791
792 switch (vcpu->arch.irq_type) {
793 case KVMPPC_IRQ_MPIC:
794 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
795 break;
796 case KVMPPC_IRQ_XICS:
797 if (xics_on_xive())
798 kvmppc_xive_cleanup_vcpu(vcpu);
799 else
800 kvmppc_xics_free_icp(vcpu);
801 break;
802 case KVMPPC_IRQ_XIVE:
803 kvmppc_xive_native_cleanup_vcpu(vcpu);
804 break;
805 }
806
807 kvmppc_core_vcpu_free(vcpu);
808
809 kvmppc_subarch_vcpu_uninit(vcpu);
810 }
811
kvm_cpu_has_pending_timer(struct kvm_vcpu * vcpu)812 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
813 {
814 return kvmppc_core_pending_dec(vcpu);
815 }
816
kvm_arch_vcpu_load(struct kvm_vcpu * vcpu,int cpu)817 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
818 {
819 #ifdef CONFIG_BOOKE
820 /*
821 * vrsave (formerly usprg0) isn't used by Linux, but may
822 * be used by the guest.
823 *
824 * On non-booke this is associated with Altivec and
825 * is handled by code in book3s.c.
826 */
827 mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
828 #endif
829 kvmppc_core_vcpu_load(vcpu, cpu);
830 }
831
kvm_arch_vcpu_put(struct kvm_vcpu * vcpu)832 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
833 {
834 kvmppc_core_vcpu_put(vcpu);
835 #ifdef CONFIG_BOOKE
836 vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
837 #endif
838 }
839
840 /*
841 * irq_bypass_add_producer and irq_bypass_del_producer are only
842 * useful if the architecture supports PCI passthrough.
843 * irq_bypass_stop and irq_bypass_start are not needed and so
844 * kvm_ops are not defined for them.
845 */
kvm_arch_has_irq_bypass(void)846 bool kvm_arch_has_irq_bypass(void)
847 {
848 return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
849 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
850 }
851
kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer * cons,struct irq_bypass_producer * prod)852 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
853 struct irq_bypass_producer *prod)
854 {
855 struct kvm_kernel_irqfd *irqfd =
856 container_of(cons, struct kvm_kernel_irqfd, consumer);
857 struct kvm *kvm = irqfd->kvm;
858
859 if (kvm->arch.kvm_ops->irq_bypass_add_producer)
860 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
861
862 return 0;
863 }
864
kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer * cons,struct irq_bypass_producer * prod)865 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
866 struct irq_bypass_producer *prod)
867 {
868 struct kvm_kernel_irqfd *irqfd =
869 container_of(cons, struct kvm_kernel_irqfd, consumer);
870 struct kvm *kvm = irqfd->kvm;
871
872 if (kvm->arch.kvm_ops->irq_bypass_del_producer)
873 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
874 }
875
876 #ifdef CONFIG_VSX
kvmppc_get_vsr_dword_offset(int index)877 static inline int kvmppc_get_vsr_dword_offset(int index)
878 {
879 int offset;
880
881 if ((index != 0) && (index != 1))
882 return -1;
883
884 #ifdef __BIG_ENDIAN
885 offset = index;
886 #else
887 offset = 1 - index;
888 #endif
889
890 return offset;
891 }
892
kvmppc_get_vsr_word_offset(int index)893 static inline int kvmppc_get_vsr_word_offset(int index)
894 {
895 int offset;
896
897 if ((index > 3) || (index < 0))
898 return -1;
899
900 #ifdef __BIG_ENDIAN
901 offset = index;
902 #else
903 offset = 3 - index;
904 #endif
905 return offset;
906 }
907
kvmppc_set_vsr_dword(struct kvm_vcpu * vcpu,u64 gpr)908 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
909 u64 gpr)
910 {
911 union kvmppc_one_reg val;
912 int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
913 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
914
915 if (offset == -1)
916 return;
917
918 if (index >= 32) {
919 kvmppc_get_vsx_vr(vcpu, index - 32, &val.vval);
920 val.vsxval[offset] = gpr;
921 kvmppc_set_vsx_vr(vcpu, index - 32, &val.vval);
922 } else {
923 kvmppc_set_vsx_fpr(vcpu, index, offset, gpr);
924 }
925 }
926
kvmppc_set_vsr_dword_dump(struct kvm_vcpu * vcpu,u64 gpr)927 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
928 u64 gpr)
929 {
930 union kvmppc_one_reg val;
931 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
932
933 if (index >= 32) {
934 kvmppc_get_vsx_vr(vcpu, index - 32, &val.vval);
935 val.vsxval[0] = gpr;
936 val.vsxval[1] = gpr;
937 kvmppc_set_vsx_vr(vcpu, index - 32, &val.vval);
938 } else {
939 kvmppc_set_vsx_fpr(vcpu, index, 0, gpr);
940 kvmppc_set_vsx_fpr(vcpu, index, 1, gpr);
941 }
942 }
943
kvmppc_set_vsr_word_dump(struct kvm_vcpu * vcpu,u32 gpr)944 static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
945 u32 gpr)
946 {
947 union kvmppc_one_reg val;
948 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
949
950 if (index >= 32) {
951 val.vsx32val[0] = gpr;
952 val.vsx32val[1] = gpr;
953 val.vsx32val[2] = gpr;
954 val.vsx32val[3] = gpr;
955 kvmppc_set_vsx_vr(vcpu, index - 32, &val.vval);
956 } else {
957 val.vsx32val[0] = gpr;
958 val.vsx32val[1] = gpr;
959 kvmppc_set_vsx_fpr(vcpu, index, 0, val.vsxval[0]);
960 kvmppc_set_vsx_fpr(vcpu, index, 1, val.vsxval[0]);
961 }
962 }
963
kvmppc_set_vsr_word(struct kvm_vcpu * vcpu,u32 gpr32)964 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
965 u32 gpr32)
966 {
967 union kvmppc_one_reg val;
968 int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
969 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
970 int dword_offset, word_offset;
971
972 if (offset == -1)
973 return;
974
975 if (index >= 32) {
976 kvmppc_get_vsx_vr(vcpu, index - 32, &val.vval);
977 val.vsx32val[offset] = gpr32;
978 kvmppc_set_vsx_vr(vcpu, index - 32, &val.vval);
979 } else {
980 dword_offset = offset / 2;
981 word_offset = offset % 2;
982 val.vsxval[0] = kvmppc_get_vsx_fpr(vcpu, index, dword_offset);
983 val.vsx32val[word_offset] = gpr32;
984 kvmppc_set_vsx_fpr(vcpu, index, dword_offset, val.vsxval[0]);
985 }
986 }
987 #endif /* CONFIG_VSX */
988
989 #ifdef CONFIG_ALTIVEC
kvmppc_get_vmx_offset_generic(struct kvm_vcpu * vcpu,int index,int element_size)990 static inline int kvmppc_get_vmx_offset_generic(struct kvm_vcpu *vcpu,
991 int index, int element_size)
992 {
993 int offset;
994 int elts = sizeof(vector128)/element_size;
995
996 if ((index < 0) || (index >= elts))
997 return -1;
998
999 if (kvmppc_need_byteswap(vcpu))
1000 offset = elts - index - 1;
1001 else
1002 offset = index;
1003
1004 return offset;
1005 }
1006
kvmppc_get_vmx_dword_offset(struct kvm_vcpu * vcpu,int index)1007 static inline int kvmppc_get_vmx_dword_offset(struct kvm_vcpu *vcpu,
1008 int index)
1009 {
1010 return kvmppc_get_vmx_offset_generic(vcpu, index, 8);
1011 }
1012
kvmppc_get_vmx_word_offset(struct kvm_vcpu * vcpu,int index)1013 static inline int kvmppc_get_vmx_word_offset(struct kvm_vcpu *vcpu,
1014 int index)
1015 {
1016 return kvmppc_get_vmx_offset_generic(vcpu, index, 4);
1017 }
1018
kvmppc_get_vmx_hword_offset(struct kvm_vcpu * vcpu,int index)1019 static inline int kvmppc_get_vmx_hword_offset(struct kvm_vcpu *vcpu,
1020 int index)
1021 {
1022 return kvmppc_get_vmx_offset_generic(vcpu, index, 2);
1023 }
1024
kvmppc_get_vmx_byte_offset(struct kvm_vcpu * vcpu,int index)1025 static inline int kvmppc_get_vmx_byte_offset(struct kvm_vcpu *vcpu,
1026 int index)
1027 {
1028 return kvmppc_get_vmx_offset_generic(vcpu, index, 1);
1029 }
1030
1031
kvmppc_set_vmx_dword(struct kvm_vcpu * vcpu,u64 gpr)1032 static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
1033 u64 gpr)
1034 {
1035 union kvmppc_one_reg val;
1036 int offset = kvmppc_get_vmx_dword_offset(vcpu,
1037 vcpu->arch.mmio_vmx_offset);
1038 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1039
1040 if (offset == -1)
1041 return;
1042
1043 kvmppc_get_vsx_vr(vcpu, index, &val.vval);
1044 val.vsxval[offset] = gpr;
1045 kvmppc_set_vsx_vr(vcpu, index, &val.vval);
1046 }
1047
kvmppc_set_vmx_word(struct kvm_vcpu * vcpu,u32 gpr32)1048 static inline void kvmppc_set_vmx_word(struct kvm_vcpu *vcpu,
1049 u32 gpr32)
1050 {
1051 union kvmppc_one_reg val;
1052 int offset = kvmppc_get_vmx_word_offset(vcpu,
1053 vcpu->arch.mmio_vmx_offset);
1054 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1055
1056 if (offset == -1)
1057 return;
1058
1059 kvmppc_get_vsx_vr(vcpu, index, &val.vval);
1060 val.vsx32val[offset] = gpr32;
1061 kvmppc_set_vsx_vr(vcpu, index, &val.vval);
1062 }
1063
kvmppc_set_vmx_hword(struct kvm_vcpu * vcpu,u16 gpr16)1064 static inline void kvmppc_set_vmx_hword(struct kvm_vcpu *vcpu,
1065 u16 gpr16)
1066 {
1067 union kvmppc_one_reg val;
1068 int offset = kvmppc_get_vmx_hword_offset(vcpu,
1069 vcpu->arch.mmio_vmx_offset);
1070 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1071
1072 if (offset == -1)
1073 return;
1074
1075 kvmppc_get_vsx_vr(vcpu, index, &val.vval);
1076 val.vsx16val[offset] = gpr16;
1077 kvmppc_set_vsx_vr(vcpu, index, &val.vval);
1078 }
1079
kvmppc_set_vmx_byte(struct kvm_vcpu * vcpu,u8 gpr8)1080 static inline void kvmppc_set_vmx_byte(struct kvm_vcpu *vcpu,
1081 u8 gpr8)
1082 {
1083 union kvmppc_one_reg val;
1084 int offset = kvmppc_get_vmx_byte_offset(vcpu,
1085 vcpu->arch.mmio_vmx_offset);
1086 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1087
1088 if (offset == -1)
1089 return;
1090
1091 kvmppc_get_vsx_vr(vcpu, index, &val.vval);
1092 val.vsx8val[offset] = gpr8;
1093 kvmppc_set_vsx_vr(vcpu, index, &val.vval);
1094 }
1095 #endif /* CONFIG_ALTIVEC */
1096
1097 #ifdef CONFIG_PPC_FPU
sp_to_dp(u32 fprs)1098 static inline u64 sp_to_dp(u32 fprs)
1099 {
1100 u64 fprd;
1101
1102 preempt_disable();
1103 enable_kernel_fp();
1104 asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m<>" (fprd) : "m<>" (fprs)
1105 : "fr0");
1106 preempt_enable();
1107 return fprd;
1108 }
1109
dp_to_sp(u64 fprd)1110 static inline u32 dp_to_sp(u64 fprd)
1111 {
1112 u32 fprs;
1113
1114 preempt_disable();
1115 enable_kernel_fp();
1116 asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m<>" (fprs) : "m<>" (fprd)
1117 : "fr0");
1118 preempt_enable();
1119 return fprs;
1120 }
1121
1122 #else
1123 #define sp_to_dp(x) (x)
1124 #define dp_to_sp(x) (x)
1125 #endif /* CONFIG_PPC_FPU */
1126
kvmppc_complete_mmio_load(struct kvm_vcpu * vcpu)1127 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu)
1128 {
1129 struct kvm_run *run = vcpu->run;
1130 u64 gpr;
1131
1132 if (run->mmio.len > sizeof(gpr))
1133 return;
1134
1135 if (!vcpu->arch.mmio_host_swabbed) {
1136 switch (run->mmio.len) {
1137 case 8: gpr = *(u64 *)run->mmio.data; break;
1138 case 4: gpr = *(u32 *)run->mmio.data; break;
1139 case 2: gpr = *(u16 *)run->mmio.data; break;
1140 case 1: gpr = *(u8 *)run->mmio.data; break;
1141 }
1142 } else {
1143 switch (run->mmio.len) {
1144 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
1145 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
1146 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
1147 case 1: gpr = *(u8 *)run->mmio.data; break;
1148 }
1149 }
1150
1151 /* conversion between single and double precision */
1152 if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
1153 gpr = sp_to_dp(gpr);
1154
1155 if (vcpu->arch.mmio_sign_extend) {
1156 switch (run->mmio.len) {
1157 #ifdef CONFIG_PPC64
1158 case 4:
1159 gpr = (s64)(s32)gpr;
1160 break;
1161 #endif
1162 case 2:
1163 gpr = (s64)(s16)gpr;
1164 break;
1165 case 1:
1166 gpr = (s64)(s8)gpr;
1167 break;
1168 }
1169 }
1170
1171 switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1172 case KVM_MMIO_REG_GPR:
1173 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1174 break;
1175 case KVM_MMIO_REG_FPR:
1176 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1177 vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);
1178
1179 kvmppc_set_fpr(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK, gpr);
1180 break;
1181 #ifdef CONFIG_PPC_BOOK3S
1182 case KVM_MMIO_REG_QPR:
1183 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1184 break;
1185 case KVM_MMIO_REG_FQPR:
1186 kvmppc_set_fpr(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK, gpr);
1187 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1188 break;
1189 #endif
1190 #ifdef CONFIG_VSX
1191 case KVM_MMIO_REG_VSX:
1192 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1193 vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);
1194
1195 if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
1196 kvmppc_set_vsr_dword(vcpu, gpr);
1197 else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
1198 kvmppc_set_vsr_word(vcpu, gpr);
1199 else if (vcpu->arch.mmio_copy_type ==
1200 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1201 kvmppc_set_vsr_dword_dump(vcpu, gpr);
1202 else if (vcpu->arch.mmio_copy_type ==
1203 KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
1204 kvmppc_set_vsr_word_dump(vcpu, gpr);
1205 break;
1206 #endif
1207 #ifdef CONFIG_ALTIVEC
1208 case KVM_MMIO_REG_VMX:
1209 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1210 vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);
1211
1212 if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_DWORD)
1213 kvmppc_set_vmx_dword(vcpu, gpr);
1214 else if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_WORD)
1215 kvmppc_set_vmx_word(vcpu, gpr);
1216 else if (vcpu->arch.mmio_copy_type ==
1217 KVMPPC_VMX_COPY_HWORD)
1218 kvmppc_set_vmx_hword(vcpu, gpr);
1219 else if (vcpu->arch.mmio_copy_type ==
1220 KVMPPC_VMX_COPY_BYTE)
1221 kvmppc_set_vmx_byte(vcpu, gpr);
1222 break;
1223 #endif
1224 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1225 case KVM_MMIO_REG_NESTED_GPR:
1226 if (kvmppc_need_byteswap(vcpu))
1227 gpr = swab64(gpr);
1228 kvm_vcpu_write_guest(vcpu, vcpu->arch.nested_io_gpr, &gpr,
1229 sizeof(gpr));
1230 break;
1231 #endif
1232 default:
1233 BUG();
1234 }
1235 }
1236
__kvmppc_handle_load(struct kvm_vcpu * vcpu,unsigned int rt,unsigned int bytes,int is_default_endian,int sign_extend)1237 static int __kvmppc_handle_load(struct kvm_vcpu *vcpu,
1238 unsigned int rt, unsigned int bytes,
1239 int is_default_endian, int sign_extend)
1240 {
1241 struct kvm_run *run = vcpu->run;
1242 int idx, ret;
1243 bool host_swabbed;
1244
1245 /* Pity C doesn't have a logical XOR operator */
1246 if (kvmppc_need_byteswap(vcpu)) {
1247 host_swabbed = is_default_endian;
1248 } else {
1249 host_swabbed = !is_default_endian;
1250 }
1251
1252 if (bytes > sizeof(run->mmio.data))
1253 return EMULATE_FAIL;
1254
1255 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1256 run->mmio.len = bytes;
1257 run->mmio.is_write = 0;
1258
1259 vcpu->arch.io_gpr = rt;
1260 vcpu->arch.mmio_host_swabbed = host_swabbed;
1261 vcpu->mmio_needed = 1;
1262 vcpu->mmio_is_write = 0;
1263 vcpu->arch.mmio_sign_extend = sign_extend;
1264
1265 idx = srcu_read_lock(&vcpu->kvm->srcu);
1266
1267 ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1268 bytes, &run->mmio.data);
1269
1270 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1271
1272 if (!ret) {
1273 kvmppc_complete_mmio_load(vcpu);
1274 vcpu->mmio_needed = 0;
1275 return EMULATE_DONE;
1276 }
1277
1278 return EMULATE_DO_MMIO;
1279 }
1280
kvmppc_handle_load(struct kvm_vcpu * vcpu,unsigned int rt,unsigned int bytes,int is_default_endian)1281 int kvmppc_handle_load(struct kvm_vcpu *vcpu,
1282 unsigned int rt, unsigned int bytes,
1283 int is_default_endian)
1284 {
1285 return __kvmppc_handle_load(vcpu, rt, bytes, is_default_endian, 0);
1286 }
1287 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1288
1289 /* Same as above, but sign extends */
kvmppc_handle_loads(struct kvm_vcpu * vcpu,unsigned int rt,unsigned int bytes,int is_default_endian)1290 int kvmppc_handle_loads(struct kvm_vcpu *vcpu,
1291 unsigned int rt, unsigned int bytes,
1292 int is_default_endian)
1293 {
1294 return __kvmppc_handle_load(vcpu, rt, bytes, is_default_endian, 1);
1295 }
1296
1297 #ifdef CONFIG_VSX
kvmppc_handle_vsx_load(struct kvm_vcpu * vcpu,unsigned int rt,unsigned int bytes,int is_default_endian,int mmio_sign_extend)1298 int kvmppc_handle_vsx_load(struct kvm_vcpu *vcpu,
1299 unsigned int rt, unsigned int bytes,
1300 int is_default_endian, int mmio_sign_extend)
1301 {
1302 enum emulation_result emulated = EMULATE_DONE;
1303
1304 /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1305 if (vcpu->arch.mmio_vsx_copy_nums > 4)
1306 return EMULATE_FAIL;
1307
1308 while (vcpu->arch.mmio_vsx_copy_nums) {
1309 emulated = __kvmppc_handle_load(vcpu, rt, bytes,
1310 is_default_endian, mmio_sign_extend);
1311
1312 if (emulated != EMULATE_DONE)
1313 break;
1314
1315 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1316
1317 vcpu->arch.mmio_vsx_copy_nums--;
1318 vcpu->arch.mmio_vsx_offset++;
1319 }
1320 return emulated;
1321 }
1322 #endif /* CONFIG_VSX */
1323
kvmppc_handle_store(struct kvm_vcpu * vcpu,u64 val,unsigned int bytes,int is_default_endian)1324 int kvmppc_handle_store(struct kvm_vcpu *vcpu,
1325 u64 val, unsigned int bytes, int is_default_endian)
1326 {
1327 struct kvm_run *run = vcpu->run;
1328 void *data = run->mmio.data;
1329 int idx, ret;
1330 bool host_swabbed;
1331
1332 /* Pity C doesn't have a logical XOR operator */
1333 if (kvmppc_need_byteswap(vcpu)) {
1334 host_swabbed = is_default_endian;
1335 } else {
1336 host_swabbed = !is_default_endian;
1337 }
1338
1339 if (bytes > sizeof(run->mmio.data))
1340 return EMULATE_FAIL;
1341
1342 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1343 run->mmio.len = bytes;
1344 run->mmio.is_write = 1;
1345 vcpu->mmio_needed = 1;
1346 vcpu->mmio_is_write = 1;
1347
1348 if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1349 val = dp_to_sp(val);
1350
1351 /* Store the value at the lowest bytes in 'data'. */
1352 if (!host_swabbed) {
1353 switch (bytes) {
1354 case 8: *(u64 *)data = val; break;
1355 case 4: *(u32 *)data = val; break;
1356 case 2: *(u16 *)data = val; break;
1357 case 1: *(u8 *)data = val; break;
1358 }
1359 } else {
1360 switch (bytes) {
1361 case 8: *(u64 *)data = swab64(val); break;
1362 case 4: *(u32 *)data = swab32(val); break;
1363 case 2: *(u16 *)data = swab16(val); break;
1364 case 1: *(u8 *)data = val; break;
1365 }
1366 }
1367
1368 idx = srcu_read_lock(&vcpu->kvm->srcu);
1369
1370 ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1371 bytes, &run->mmio.data);
1372
1373 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1374
1375 if (!ret) {
1376 vcpu->mmio_needed = 0;
1377 return EMULATE_DONE;
1378 }
1379
1380 return EMULATE_DO_MMIO;
1381 }
1382 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1383
1384 #ifdef CONFIG_VSX
kvmppc_get_vsr_data(struct kvm_vcpu * vcpu,int rs,u64 * val)1385 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1386 {
1387 u32 dword_offset, word_offset;
1388 union kvmppc_one_reg reg;
1389 int vsx_offset = 0;
1390 int copy_type = vcpu->arch.mmio_copy_type;
1391 int result = 0;
1392
1393 switch (copy_type) {
1394 case KVMPPC_VSX_COPY_DWORD:
1395 vsx_offset =
1396 kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1397
1398 if (vsx_offset == -1) {
1399 result = -1;
1400 break;
1401 }
1402
1403 if (rs < 32) {
1404 *val = kvmppc_get_vsx_fpr(vcpu, rs, vsx_offset);
1405 } else {
1406 kvmppc_get_vsx_vr(vcpu, rs - 32, ®.vval);
1407 *val = reg.vsxval[vsx_offset];
1408 }
1409 break;
1410
1411 case KVMPPC_VSX_COPY_WORD:
1412 vsx_offset =
1413 kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1414
1415 if (vsx_offset == -1) {
1416 result = -1;
1417 break;
1418 }
1419
1420 if (rs < 32) {
1421 dword_offset = vsx_offset / 2;
1422 word_offset = vsx_offset % 2;
1423 reg.vsxval[0] = kvmppc_get_vsx_fpr(vcpu, rs, dword_offset);
1424 *val = reg.vsx32val[word_offset];
1425 } else {
1426 kvmppc_get_vsx_vr(vcpu, rs - 32, ®.vval);
1427 *val = reg.vsx32val[vsx_offset];
1428 }
1429 break;
1430
1431 default:
1432 result = -1;
1433 break;
1434 }
1435
1436 return result;
1437 }
1438
kvmppc_handle_vsx_store(struct kvm_vcpu * vcpu,int rs,unsigned int bytes,int is_default_endian)1439 int kvmppc_handle_vsx_store(struct kvm_vcpu *vcpu,
1440 int rs, unsigned int bytes, int is_default_endian)
1441 {
1442 u64 val;
1443 enum emulation_result emulated = EMULATE_DONE;
1444
1445 vcpu->arch.io_gpr = rs;
1446
1447 /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1448 if (vcpu->arch.mmio_vsx_copy_nums > 4)
1449 return EMULATE_FAIL;
1450
1451 while (vcpu->arch.mmio_vsx_copy_nums) {
1452 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1453 return EMULATE_FAIL;
1454
1455 emulated = kvmppc_handle_store(vcpu,
1456 val, bytes, is_default_endian);
1457
1458 if (emulated != EMULATE_DONE)
1459 break;
1460
1461 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1462
1463 vcpu->arch.mmio_vsx_copy_nums--;
1464 vcpu->arch.mmio_vsx_offset++;
1465 }
1466
1467 return emulated;
1468 }
1469
kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu * vcpu)1470 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu)
1471 {
1472 struct kvm_run *run = vcpu->run;
1473 enum emulation_result emulated = EMULATE_FAIL;
1474 int r;
1475
1476 vcpu->arch.paddr_accessed += run->mmio.len;
1477
1478 if (!vcpu->mmio_is_write) {
1479 emulated = kvmppc_handle_vsx_load(vcpu, vcpu->arch.io_gpr,
1480 run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1481 } else {
1482 emulated = kvmppc_handle_vsx_store(vcpu,
1483 vcpu->arch.io_gpr, run->mmio.len, 1);
1484 }
1485
1486 switch (emulated) {
1487 case EMULATE_DO_MMIO:
1488 run->exit_reason = KVM_EXIT_MMIO;
1489 r = RESUME_HOST;
1490 break;
1491 case EMULATE_FAIL:
1492 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1493 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1494 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1495 r = RESUME_HOST;
1496 break;
1497 default:
1498 r = RESUME_GUEST;
1499 break;
1500 }
1501 return r;
1502 }
1503 #endif /* CONFIG_VSX */
1504
1505 #ifdef CONFIG_ALTIVEC
kvmppc_handle_vmx_load(struct kvm_vcpu * vcpu,unsigned int rt,unsigned int bytes,int is_default_endian)1506 int kvmppc_handle_vmx_load(struct kvm_vcpu *vcpu,
1507 unsigned int rt, unsigned int bytes, int is_default_endian)
1508 {
1509 enum emulation_result emulated = EMULATE_DONE;
1510
1511 if (vcpu->arch.mmio_vmx_copy_nums > 2)
1512 return EMULATE_FAIL;
1513
1514 while (vcpu->arch.mmio_vmx_copy_nums) {
1515 emulated = __kvmppc_handle_load(vcpu, rt, bytes,
1516 is_default_endian, 0);
1517
1518 if (emulated != EMULATE_DONE)
1519 break;
1520
1521 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1522 vcpu->arch.mmio_vmx_copy_nums--;
1523 vcpu->arch.mmio_vmx_offset++;
1524 }
1525
1526 return emulated;
1527 }
1528
kvmppc_get_vmx_dword(struct kvm_vcpu * vcpu,int index,u64 * val)1529 static int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
1530 {
1531 union kvmppc_one_reg reg;
1532 int vmx_offset = 0;
1533 int result = 0;
1534
1535 vmx_offset =
1536 kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1537
1538 if (vmx_offset == -1)
1539 return -1;
1540
1541 kvmppc_get_vsx_vr(vcpu, index, ®.vval);
1542 *val = reg.vsxval[vmx_offset];
1543
1544 return result;
1545 }
1546
kvmppc_get_vmx_word(struct kvm_vcpu * vcpu,int index,u64 * val)1547 static int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
1548 {
1549 union kvmppc_one_reg reg;
1550 int vmx_offset = 0;
1551 int result = 0;
1552
1553 vmx_offset =
1554 kvmppc_get_vmx_word_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1555
1556 if (vmx_offset == -1)
1557 return -1;
1558
1559 kvmppc_get_vsx_vr(vcpu, index, ®.vval);
1560 *val = reg.vsx32val[vmx_offset];
1561
1562 return result;
1563 }
1564
kvmppc_get_vmx_hword(struct kvm_vcpu * vcpu,int index,u64 * val)1565 static int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
1566 {
1567 union kvmppc_one_reg reg;
1568 int vmx_offset = 0;
1569 int result = 0;
1570
1571 vmx_offset =
1572 kvmppc_get_vmx_hword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1573
1574 if (vmx_offset == -1)
1575 return -1;
1576
1577 kvmppc_get_vsx_vr(vcpu, index, ®.vval);
1578 *val = reg.vsx16val[vmx_offset];
1579
1580 return result;
1581 }
1582
kvmppc_get_vmx_byte(struct kvm_vcpu * vcpu,int index,u64 * val)1583 static int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
1584 {
1585 union kvmppc_one_reg reg;
1586 int vmx_offset = 0;
1587 int result = 0;
1588
1589 vmx_offset =
1590 kvmppc_get_vmx_byte_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1591
1592 if (vmx_offset == -1)
1593 return -1;
1594
1595 kvmppc_get_vsx_vr(vcpu, index, ®.vval);
1596 *val = reg.vsx8val[vmx_offset];
1597
1598 return result;
1599 }
1600
kvmppc_handle_vmx_store(struct kvm_vcpu * vcpu,unsigned int rs,unsigned int bytes,int is_default_endian)1601 int kvmppc_handle_vmx_store(struct kvm_vcpu *vcpu,
1602 unsigned int rs, unsigned int bytes, int is_default_endian)
1603 {
1604 u64 val = 0;
1605 unsigned int index = rs & KVM_MMIO_REG_MASK;
1606 enum emulation_result emulated = EMULATE_DONE;
1607
1608 if (vcpu->arch.mmio_vmx_copy_nums > 2)
1609 return EMULATE_FAIL;
1610
1611 vcpu->arch.io_gpr = rs;
1612
1613 while (vcpu->arch.mmio_vmx_copy_nums) {
1614 switch (vcpu->arch.mmio_copy_type) {
1615 case KVMPPC_VMX_COPY_DWORD:
1616 if (kvmppc_get_vmx_dword(vcpu, index, &val) == -1)
1617 return EMULATE_FAIL;
1618
1619 break;
1620 case KVMPPC_VMX_COPY_WORD:
1621 if (kvmppc_get_vmx_word(vcpu, index, &val) == -1)
1622 return EMULATE_FAIL;
1623 break;
1624 case KVMPPC_VMX_COPY_HWORD:
1625 if (kvmppc_get_vmx_hword(vcpu, index, &val) == -1)
1626 return EMULATE_FAIL;
1627 break;
1628 case KVMPPC_VMX_COPY_BYTE:
1629 if (kvmppc_get_vmx_byte(vcpu, index, &val) == -1)
1630 return EMULATE_FAIL;
1631 break;
1632 default:
1633 return EMULATE_FAIL;
1634 }
1635
1636 emulated = kvmppc_handle_store(vcpu, val, bytes,
1637 is_default_endian);
1638 if (emulated != EMULATE_DONE)
1639 break;
1640
1641 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1642 vcpu->arch.mmio_vmx_copy_nums--;
1643 vcpu->arch.mmio_vmx_offset++;
1644 }
1645
1646 return emulated;
1647 }
1648
kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu * vcpu)1649 static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu)
1650 {
1651 struct kvm_run *run = vcpu->run;
1652 enum emulation_result emulated = EMULATE_FAIL;
1653 int r;
1654
1655 vcpu->arch.paddr_accessed += run->mmio.len;
1656
1657 if (!vcpu->mmio_is_write) {
1658 emulated = kvmppc_handle_vmx_load(vcpu,
1659 vcpu->arch.io_gpr, run->mmio.len, 1);
1660 } else {
1661 emulated = kvmppc_handle_vmx_store(vcpu,
1662 vcpu->arch.io_gpr, run->mmio.len, 1);
1663 }
1664
1665 switch (emulated) {
1666 case EMULATE_DO_MMIO:
1667 run->exit_reason = KVM_EXIT_MMIO;
1668 r = RESUME_HOST;
1669 break;
1670 case EMULATE_FAIL:
1671 pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
1672 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1673 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1674 r = RESUME_HOST;
1675 break;
1676 default:
1677 r = RESUME_GUEST;
1678 break;
1679 }
1680 return r;
1681 }
1682 #endif /* CONFIG_ALTIVEC */
1683
kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu * vcpu,struct kvm_one_reg * reg)1684 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1685 {
1686 int r = 0;
1687 union kvmppc_one_reg val;
1688 int size;
1689
1690 size = one_reg_size(reg->id);
1691 if (size > sizeof(val))
1692 return -EINVAL;
1693
1694 r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1695 if (r == -EINVAL) {
1696 r = 0;
1697 switch (reg->id) {
1698 #ifdef CONFIG_ALTIVEC
1699 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1700 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1701 r = -ENXIO;
1702 break;
1703 }
1704 kvmppc_get_vsx_vr(vcpu, reg->id - KVM_REG_PPC_VR0, &val.vval);
1705 break;
1706 case KVM_REG_PPC_VSCR:
1707 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1708 r = -ENXIO;
1709 break;
1710 }
1711 val = get_reg_val(reg->id, kvmppc_get_vscr(vcpu));
1712 break;
1713 case KVM_REG_PPC_VRSAVE:
1714 val = get_reg_val(reg->id, kvmppc_get_vrsave(vcpu));
1715 break;
1716 #endif /* CONFIG_ALTIVEC */
1717 default:
1718 r = -EINVAL;
1719 break;
1720 }
1721 }
1722
1723 if (r)
1724 return r;
1725
1726 if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1727 r = -EFAULT;
1728
1729 return r;
1730 }
1731
kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu * vcpu,struct kvm_one_reg * reg)1732 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1733 {
1734 int r;
1735 union kvmppc_one_reg val;
1736 int size;
1737
1738 size = one_reg_size(reg->id);
1739 if (size > sizeof(val))
1740 return -EINVAL;
1741
1742 if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1743 return -EFAULT;
1744
1745 r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1746 if (r == -EINVAL) {
1747 r = 0;
1748 switch (reg->id) {
1749 #ifdef CONFIG_ALTIVEC
1750 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1751 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1752 r = -ENXIO;
1753 break;
1754 }
1755 kvmppc_set_vsx_vr(vcpu, reg->id - KVM_REG_PPC_VR0, &val.vval);
1756 break;
1757 case KVM_REG_PPC_VSCR:
1758 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1759 r = -ENXIO;
1760 break;
1761 }
1762 kvmppc_set_vscr(vcpu, set_reg_val(reg->id, val));
1763 break;
1764 case KVM_REG_PPC_VRSAVE:
1765 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1766 r = -ENXIO;
1767 break;
1768 }
1769 kvmppc_set_vrsave(vcpu, set_reg_val(reg->id, val));
1770 break;
1771 #endif /* CONFIG_ALTIVEC */
1772 default:
1773 r = -EINVAL;
1774 break;
1775 }
1776 }
1777
1778 return r;
1779 }
1780
kvm_arch_vcpu_ioctl_run(struct kvm_vcpu * vcpu)1781 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
1782 {
1783 struct kvm_run *run = vcpu->run;
1784 int r;
1785
1786 vcpu_load(vcpu);
1787
1788 if (vcpu->mmio_needed) {
1789 vcpu->mmio_needed = 0;
1790 if (!vcpu->mmio_is_write)
1791 kvmppc_complete_mmio_load(vcpu);
1792 #ifdef CONFIG_VSX
1793 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1794 vcpu->arch.mmio_vsx_copy_nums--;
1795 vcpu->arch.mmio_vsx_offset++;
1796 }
1797
1798 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1799 r = kvmppc_emulate_mmio_vsx_loadstore(vcpu);
1800 if (r == RESUME_HOST) {
1801 vcpu->mmio_needed = 1;
1802 goto out;
1803 }
1804 }
1805 #endif
1806 #ifdef CONFIG_ALTIVEC
1807 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1808 vcpu->arch.mmio_vmx_copy_nums--;
1809 vcpu->arch.mmio_vmx_offset++;
1810 }
1811
1812 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1813 r = kvmppc_emulate_mmio_vmx_loadstore(vcpu);
1814 if (r == RESUME_HOST) {
1815 vcpu->mmio_needed = 1;
1816 goto out;
1817 }
1818 }
1819 #endif
1820 } else if (vcpu->arch.osi_needed) {
1821 u64 *gprs = run->osi.gprs;
1822 int i;
1823
1824 for (i = 0; i < 32; i++)
1825 kvmppc_set_gpr(vcpu, i, gprs[i]);
1826 vcpu->arch.osi_needed = 0;
1827 } else if (vcpu->arch.hcall_needed) {
1828 int i;
1829
1830 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1831 for (i = 0; i < 9; ++i)
1832 kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1833 vcpu->arch.hcall_needed = 0;
1834 #ifdef CONFIG_BOOKE
1835 } else if (vcpu->arch.epr_needed) {
1836 kvmppc_set_epr(vcpu, run->epr.epr);
1837 vcpu->arch.epr_needed = 0;
1838 #endif
1839 }
1840
1841 kvm_sigset_activate(vcpu);
1842
1843 if (!vcpu->wants_to_run)
1844 r = -EINTR;
1845 else
1846 r = kvmppc_vcpu_run(vcpu);
1847
1848 kvm_sigset_deactivate(vcpu);
1849
1850 #ifdef CONFIG_ALTIVEC
1851 out:
1852 #endif
1853
1854 /*
1855 * We're already returning to userspace, don't pass the
1856 * RESUME_HOST flags along.
1857 */
1858 if (r > 0)
1859 r = 0;
1860
1861 vcpu_put(vcpu);
1862 return r;
1863 }
1864
kvm_vcpu_ioctl_interrupt(struct kvm_vcpu * vcpu,struct kvm_interrupt * irq)1865 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1866 {
1867 if (irq->irq == KVM_INTERRUPT_UNSET) {
1868 kvmppc_core_dequeue_external(vcpu);
1869 return 0;
1870 }
1871
1872 kvmppc_core_queue_external(vcpu, irq);
1873
1874 kvm_vcpu_kick(vcpu);
1875
1876 return 0;
1877 }
1878
kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu * vcpu,struct kvm_enable_cap * cap)1879 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1880 struct kvm_enable_cap *cap)
1881 {
1882 int r;
1883
1884 if (cap->flags)
1885 return -EINVAL;
1886
1887 switch (cap->cap) {
1888 case KVM_CAP_PPC_OSI:
1889 r = 0;
1890 vcpu->arch.osi_enabled = true;
1891 break;
1892 case KVM_CAP_PPC_PAPR:
1893 r = 0;
1894 vcpu->arch.papr_enabled = true;
1895 break;
1896 case KVM_CAP_PPC_EPR:
1897 r = 0;
1898 if (cap->args[0])
1899 vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1900 else
1901 vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1902 break;
1903 #ifdef CONFIG_BOOKE
1904 case KVM_CAP_PPC_BOOKE_WATCHDOG:
1905 r = 0;
1906 vcpu->arch.watchdog_enabled = true;
1907 break;
1908 #endif
1909 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1910 case KVM_CAP_SW_TLB: {
1911 struct kvm_config_tlb cfg;
1912 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1913
1914 r = -EFAULT;
1915 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1916 break;
1917
1918 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1919 break;
1920 }
1921 #endif
1922 #ifdef CONFIG_KVM_MPIC
1923 case KVM_CAP_IRQ_MPIC: {
1924 CLASS(fd, f)(cap->args[0]);
1925 struct kvm_device *dev;
1926
1927 r = -EBADF;
1928 if (fd_empty(f))
1929 break;
1930
1931 r = -EPERM;
1932 dev = kvm_device_from_filp(fd_file(f));
1933 if (dev)
1934 r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1935
1936 break;
1937 }
1938 #endif
1939 #ifdef CONFIG_KVM_XICS
1940 case KVM_CAP_IRQ_XICS: {
1941 CLASS(fd, f)(cap->args[0]);
1942 struct kvm_device *dev;
1943
1944 r = -EBADF;
1945 if (fd_empty(f))
1946 break;
1947
1948 r = -EPERM;
1949 dev = kvm_device_from_filp(fd_file(f));
1950 if (dev) {
1951 if (xics_on_xive())
1952 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1953 else
1954 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1955 }
1956 break;
1957 }
1958 #endif /* CONFIG_KVM_XICS */
1959 #ifdef CONFIG_KVM_XIVE
1960 case KVM_CAP_PPC_IRQ_XIVE: {
1961 CLASS(fd, f)(cap->args[0]);
1962 struct kvm_device *dev;
1963
1964 r = -EBADF;
1965 if (fd_empty(f))
1966 break;
1967
1968 r = -ENXIO;
1969 if (!xive_enabled())
1970 break;
1971
1972 r = -EPERM;
1973 dev = kvm_device_from_filp(fd_file(f));
1974 if (dev)
1975 r = kvmppc_xive_native_connect_vcpu(dev, vcpu,
1976 cap->args[1]);
1977 break;
1978 }
1979 #endif /* CONFIG_KVM_XIVE */
1980 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1981 case KVM_CAP_PPC_FWNMI:
1982 r = -EINVAL;
1983 if (!is_kvmppc_hv_enabled(vcpu->kvm))
1984 break;
1985 r = 0;
1986 vcpu->kvm->arch.fwnmi_enabled = true;
1987 break;
1988 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
1989 default:
1990 r = -EINVAL;
1991 break;
1992 }
1993
1994 if (!r)
1995 r = kvmppc_sanity_check(vcpu);
1996
1997 return r;
1998 }
1999
kvm_arch_intc_initialized(struct kvm * kvm)2000 bool kvm_arch_intc_initialized(struct kvm *kvm)
2001 {
2002 #ifdef CONFIG_KVM_MPIC
2003 if (kvm->arch.mpic)
2004 return true;
2005 #endif
2006 #ifdef CONFIG_KVM_XICS
2007 if (kvm->arch.xics || kvm->arch.xive)
2008 return true;
2009 #endif
2010 return false;
2011 }
2012
kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu * vcpu,struct kvm_mp_state * mp_state)2013 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
2014 struct kvm_mp_state *mp_state)
2015 {
2016 return -EINVAL;
2017 }
2018
kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu * vcpu,struct kvm_mp_state * mp_state)2019 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
2020 struct kvm_mp_state *mp_state)
2021 {
2022 return -EINVAL;
2023 }
2024
kvm_arch_vcpu_unlocked_ioctl(struct file * filp,unsigned int ioctl,unsigned long arg)2025 long kvm_arch_vcpu_unlocked_ioctl(struct file *filp, unsigned int ioctl,
2026 unsigned long arg)
2027 {
2028 struct kvm_vcpu *vcpu = filp->private_data;
2029 void __user *argp = (void __user *)arg;
2030
2031 if (ioctl == KVM_INTERRUPT) {
2032 struct kvm_interrupt irq;
2033 if (copy_from_user(&irq, argp, sizeof(irq)))
2034 return -EFAULT;
2035 return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2036 }
2037 return -ENOIOCTLCMD;
2038 }
2039
kvm_arch_vcpu_ioctl(struct file * filp,unsigned int ioctl,unsigned long arg)2040 long kvm_arch_vcpu_ioctl(struct file *filp,
2041 unsigned int ioctl, unsigned long arg)
2042 {
2043 struct kvm_vcpu *vcpu = filp->private_data;
2044 void __user *argp = (void __user *)arg;
2045 long r;
2046
2047 switch (ioctl) {
2048 case KVM_ENABLE_CAP:
2049 {
2050 struct kvm_enable_cap cap;
2051 r = -EFAULT;
2052 if (copy_from_user(&cap, argp, sizeof(cap)))
2053 goto out;
2054 vcpu_load(vcpu);
2055 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
2056 vcpu_put(vcpu);
2057 break;
2058 }
2059
2060 case KVM_SET_ONE_REG:
2061 case KVM_GET_ONE_REG:
2062 {
2063 struct kvm_one_reg reg;
2064 r = -EFAULT;
2065 if (copy_from_user(®, argp, sizeof(reg)))
2066 goto out;
2067 if (ioctl == KVM_SET_ONE_REG)
2068 r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®);
2069 else
2070 r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®);
2071 break;
2072 }
2073
2074 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
2075 case KVM_DIRTY_TLB: {
2076 struct kvm_dirty_tlb dirty;
2077 r = -EFAULT;
2078 if (copy_from_user(&dirty, argp, sizeof(dirty)))
2079 goto out;
2080 vcpu_load(vcpu);
2081 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
2082 vcpu_put(vcpu);
2083 break;
2084 }
2085 #endif
2086 default:
2087 r = -EINVAL;
2088 }
2089
2090 out:
2091 return r;
2092 }
2093
kvm_arch_vcpu_fault(struct kvm_vcpu * vcpu,struct vm_fault * vmf)2094 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2095 {
2096 return VM_FAULT_SIGBUS;
2097 }
2098
kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo * pvinfo)2099 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
2100 {
2101 u32 inst_nop = 0x60000000;
2102 #ifdef CONFIG_KVM_BOOKE_HV
2103 u32 inst_sc1 = 0x44000022;
2104 pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
2105 pvinfo->hcall[1] = cpu_to_be32(inst_nop);
2106 pvinfo->hcall[2] = cpu_to_be32(inst_nop);
2107 pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2108 #else
2109 u32 inst_lis = 0x3c000000;
2110 u32 inst_ori = 0x60000000;
2111 u32 inst_sc = 0x44000002;
2112 u32 inst_imm_mask = 0xffff;
2113
2114 /*
2115 * The hypercall to get into KVM from within guest context is as
2116 * follows:
2117 *
2118 * lis r0, r0, KVM_SC_MAGIC_R0@h
2119 * ori r0, KVM_SC_MAGIC_R0@l
2120 * sc
2121 * nop
2122 */
2123 pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
2124 pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
2125 pvinfo->hcall[2] = cpu_to_be32(inst_sc);
2126 pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2127 #endif
2128
2129 pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
2130
2131 return 0;
2132 }
2133
kvm_arch_irqchip_in_kernel(struct kvm * kvm)2134 bool kvm_arch_irqchip_in_kernel(struct kvm *kvm)
2135 {
2136 int ret = 0;
2137
2138 #ifdef CONFIG_KVM_MPIC
2139 ret = ret || (kvm->arch.mpic != NULL);
2140 #endif
2141 #ifdef CONFIG_KVM_XICS
2142 ret = ret || (kvm->arch.xics != NULL);
2143 ret = ret || (kvm->arch.xive != NULL);
2144 #endif
2145 smp_rmb();
2146 return ret;
2147 }
2148
kvm_vm_ioctl_irq_line(struct kvm * kvm,struct kvm_irq_level * irq_event,bool line_status)2149 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
2150 bool line_status)
2151 {
2152 if (!kvm_arch_irqchip_in_kernel(kvm))
2153 return -ENXIO;
2154
2155 irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
2156 irq_event->irq, irq_event->level,
2157 line_status);
2158 return 0;
2159 }
2160
2161
kvm_vm_ioctl_enable_cap(struct kvm * kvm,struct kvm_enable_cap * cap)2162 int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
2163 struct kvm_enable_cap *cap)
2164 {
2165 int r;
2166
2167 if (cap->flags)
2168 return -EINVAL;
2169
2170 switch (cap->cap) {
2171 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
2172 case KVM_CAP_PPC_ENABLE_HCALL: {
2173 unsigned long hcall = cap->args[0];
2174
2175 r = -EINVAL;
2176 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
2177 cap->args[1] > 1)
2178 break;
2179 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
2180 break;
2181 if (cap->args[1])
2182 set_bit(hcall / 4, kvm->arch.enabled_hcalls);
2183 else
2184 clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
2185 r = 0;
2186 break;
2187 }
2188 case KVM_CAP_PPC_SMT: {
2189 unsigned long mode = cap->args[0];
2190 unsigned long flags = cap->args[1];
2191
2192 r = -EINVAL;
2193 if (kvm->arch.kvm_ops->set_smt_mode)
2194 r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
2195 break;
2196 }
2197
2198 case KVM_CAP_PPC_NESTED_HV:
2199 r = -EINVAL;
2200 if (!is_kvmppc_hv_enabled(kvm) ||
2201 !kvm->arch.kvm_ops->enable_nested)
2202 break;
2203 r = kvm->arch.kvm_ops->enable_nested(kvm);
2204 break;
2205 #endif
2206 #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
2207 case KVM_CAP_PPC_SECURE_GUEST:
2208 r = -EINVAL;
2209 if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_svm)
2210 break;
2211 r = kvm->arch.kvm_ops->enable_svm(kvm);
2212 break;
2213 case KVM_CAP_PPC_DAWR1:
2214 r = -EINVAL;
2215 if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_dawr1)
2216 break;
2217 r = kvm->arch.kvm_ops->enable_dawr1(kvm);
2218 break;
2219 #endif
2220 default:
2221 r = -EINVAL;
2222 break;
2223 }
2224
2225 return r;
2226 }
2227
2228 #ifdef CONFIG_PPC_BOOK3S_64
2229 /*
2230 * These functions check whether the underlying hardware is safe
2231 * against attacks based on observing the effects of speculatively
2232 * executed instructions, and whether it supplies instructions for
2233 * use in workarounds. The information comes from firmware, either
2234 * via the device tree on powernv platforms or from an hcall on
2235 * pseries platforms.
2236 */
2237 #ifdef CONFIG_PPC_PSERIES
pseries_get_cpu_char(struct kvm_ppc_cpu_char * cp)2238 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2239 {
2240 struct h_cpu_char_result c;
2241 unsigned long rc;
2242
2243 if (!machine_is(pseries))
2244 return -ENOTTY;
2245
2246 rc = plpar_get_cpu_characteristics(&c);
2247 if (rc == H_SUCCESS) {
2248 cp->character = c.character;
2249 cp->behaviour = c.behaviour;
2250 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2251 KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2252 KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2253 KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2254 KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2255 KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
2256 KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
2257 KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2258 KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2259 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2260 KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2261 KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2262 KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2263 }
2264 return 0;
2265 }
2266 #else
pseries_get_cpu_char(struct kvm_ppc_cpu_char * cp)2267 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2268 {
2269 return -ENOTTY;
2270 }
2271 #endif
2272
have_fw_feat(struct device_node * fw_features,const char * state,const char * name)2273 static inline bool have_fw_feat(struct device_node *fw_features,
2274 const char *state, const char *name)
2275 {
2276 struct device_node *np;
2277 bool r = false;
2278
2279 np = of_get_child_by_name(fw_features, name);
2280 if (np) {
2281 r = of_property_read_bool(np, state);
2282 of_node_put(np);
2283 }
2284 return r;
2285 }
2286
kvmppc_get_cpu_char(struct kvm_ppc_cpu_char * cp)2287 static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2288 {
2289 struct device_node *np, *fw_features;
2290 int r;
2291
2292 memset(cp, 0, sizeof(*cp));
2293 r = pseries_get_cpu_char(cp);
2294 if (r != -ENOTTY)
2295 return r;
2296
2297 np = of_find_node_by_name(NULL, "ibm,opal");
2298 if (np) {
2299 fw_features = of_get_child_by_name(np, "fw-features");
2300 of_node_put(np);
2301 if (!fw_features)
2302 return 0;
2303 if (have_fw_feat(fw_features, "enabled",
2304 "inst-spec-barrier-ori31,31,0"))
2305 cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31;
2306 if (have_fw_feat(fw_features, "enabled",
2307 "fw-bcctrl-serialized"))
2308 cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED;
2309 if (have_fw_feat(fw_features, "enabled",
2310 "inst-l1d-flush-ori30,30,0"))
2311 cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30;
2312 if (have_fw_feat(fw_features, "enabled",
2313 "inst-l1d-flush-trig2"))
2314 cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2;
2315 if (have_fw_feat(fw_features, "enabled",
2316 "fw-l1d-thread-split"))
2317 cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV;
2318 if (have_fw_feat(fw_features, "enabled",
2319 "fw-count-cache-disabled"))
2320 cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2321 if (have_fw_feat(fw_features, "enabled",
2322 "fw-count-cache-flush-bcctr2,0,0"))
2323 cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2324 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2325 KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2326 KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2327 KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2328 KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2329 KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2330 KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2331
2332 if (have_fw_feat(fw_features, "enabled",
2333 "speculation-policy-favor-security"))
2334 cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY;
2335 if (!have_fw_feat(fw_features, "disabled",
2336 "needs-l1d-flush-msr-pr-0-to-1"))
2337 cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR;
2338 if (!have_fw_feat(fw_features, "disabled",
2339 "needs-spec-barrier-for-bound-checks"))
2340 cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2341 if (have_fw_feat(fw_features, "enabled",
2342 "needs-count-cache-flush-on-context-switch"))
2343 cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2344 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2345 KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2346 KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2347 KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2348
2349 of_node_put(fw_features);
2350 }
2351
2352 return 0;
2353 }
2354 #endif
2355
kvm_arch_vm_ioctl(struct file * filp,unsigned int ioctl,unsigned long arg)2356 int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
2357 {
2358 struct kvm *kvm __maybe_unused = filp->private_data;
2359 void __user *argp = (void __user *)arg;
2360 int r;
2361
2362 switch (ioctl) {
2363 case KVM_PPC_GET_PVINFO: {
2364 struct kvm_ppc_pvinfo pvinfo;
2365 memset(&pvinfo, 0, sizeof(pvinfo));
2366 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
2367 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
2368 r = -EFAULT;
2369 goto out;
2370 }
2371
2372 break;
2373 }
2374 #ifdef CONFIG_SPAPR_TCE_IOMMU
2375 case KVM_CREATE_SPAPR_TCE_64: {
2376 struct kvm_create_spapr_tce_64 create_tce_64;
2377
2378 r = -EFAULT;
2379 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
2380 goto out;
2381 if (create_tce_64.flags) {
2382 r = -EINVAL;
2383 goto out;
2384 }
2385 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2386 goto out;
2387 }
2388 case KVM_CREATE_SPAPR_TCE: {
2389 struct kvm_create_spapr_tce create_tce;
2390 struct kvm_create_spapr_tce_64 create_tce_64;
2391
2392 r = -EFAULT;
2393 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
2394 goto out;
2395
2396 create_tce_64.liobn = create_tce.liobn;
2397 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
2398 create_tce_64.offset = 0;
2399 create_tce_64.size = create_tce.window_size >>
2400 IOMMU_PAGE_SHIFT_4K;
2401 create_tce_64.flags = 0;
2402 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2403 goto out;
2404 }
2405 #endif
2406 #ifdef CONFIG_PPC_BOOK3S_64
2407 case KVM_PPC_GET_SMMU_INFO: {
2408 struct kvm_ppc_smmu_info info;
2409 struct kvm *kvm = filp->private_data;
2410
2411 memset(&info, 0, sizeof(info));
2412 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2413 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2414 r = -EFAULT;
2415 break;
2416 }
2417 case KVM_PPC_RTAS_DEFINE_TOKEN: {
2418 struct kvm *kvm = filp->private_data;
2419
2420 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
2421 break;
2422 }
2423 case KVM_PPC_CONFIGURE_V3_MMU: {
2424 struct kvm *kvm = filp->private_data;
2425 struct kvm_ppc_mmuv3_cfg cfg;
2426
2427 r = -EINVAL;
2428 if (!kvm->arch.kvm_ops->configure_mmu)
2429 goto out;
2430 r = -EFAULT;
2431 if (copy_from_user(&cfg, argp, sizeof(cfg)))
2432 goto out;
2433 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
2434 break;
2435 }
2436 case KVM_PPC_GET_RMMU_INFO: {
2437 struct kvm *kvm = filp->private_data;
2438 struct kvm_ppc_rmmu_info info;
2439
2440 r = -EINVAL;
2441 if (!kvm->arch.kvm_ops->get_rmmu_info)
2442 goto out;
2443 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
2444 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2445 r = -EFAULT;
2446 break;
2447 }
2448 case KVM_PPC_GET_CPU_CHAR: {
2449 struct kvm_ppc_cpu_char cpuchar;
2450
2451 r = kvmppc_get_cpu_char(&cpuchar);
2452 if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar)))
2453 r = -EFAULT;
2454 break;
2455 }
2456 case KVM_PPC_SVM_OFF: {
2457 struct kvm *kvm = filp->private_data;
2458
2459 r = 0;
2460 if (!kvm->arch.kvm_ops->svm_off)
2461 goto out;
2462
2463 r = kvm->arch.kvm_ops->svm_off(kvm);
2464 break;
2465 }
2466 default: {
2467 struct kvm *kvm = filp->private_data;
2468 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
2469 }
2470 #else /* CONFIG_PPC_BOOK3S_64 */
2471 default:
2472 r = -ENOTTY;
2473 #endif
2474 }
2475 out:
2476 return r;
2477 }
2478
2479 static DEFINE_IDA(lpid_inuse);
2480 static unsigned long nr_lpids;
2481
kvmppc_alloc_lpid(void)2482 long kvmppc_alloc_lpid(void)
2483 {
2484 int lpid;
2485
2486 /* The host LPID must always be 0 (allocation starts at 1) */
2487 lpid = ida_alloc_range(&lpid_inuse, 1, nr_lpids - 1, GFP_KERNEL);
2488 if (lpid < 0) {
2489 if (lpid == -ENOMEM)
2490 pr_err("%s: Out of memory\n", __func__);
2491 else
2492 pr_err("%s: No LPIDs free\n", __func__);
2493 return -ENOMEM;
2494 }
2495
2496 return lpid;
2497 }
2498 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2499
kvmppc_free_lpid(long lpid)2500 void kvmppc_free_lpid(long lpid)
2501 {
2502 ida_free(&lpid_inuse, lpid);
2503 }
2504 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2505
2506 /* nr_lpids_param includes the host LPID */
kvmppc_init_lpid(unsigned long nr_lpids_param)2507 void kvmppc_init_lpid(unsigned long nr_lpids_param)
2508 {
2509 nr_lpids = nr_lpids_param;
2510 }
2511 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2512
2513 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);
2514
kvm_arch_create_vcpu_debugfs(struct kvm_vcpu * vcpu,struct dentry * debugfs_dentry)2515 void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry)
2516 {
2517 if (vcpu->kvm->arch.kvm_ops->create_vcpu_debugfs)
2518 vcpu->kvm->arch.kvm_ops->create_vcpu_debugfs(vcpu, debugfs_dentry);
2519 }
2520
kvm_arch_create_vm_debugfs(struct kvm * kvm)2521 void kvm_arch_create_vm_debugfs(struct kvm *kvm)
2522 {
2523 if (kvm->arch.kvm_ops->create_vm_debugfs)
2524 kvm->arch.kvm_ops->create_vm_debugfs(kvm);
2525 }
2526