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TOMOYO Linux Cross Reference
Linux/arch/powerpc/kvm/powerpc.c

Version: ~ [ linux-5.3-rc1 ] ~ [ linux-5.2.2 ] ~ [ linux-5.1.19 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.60 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.134 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.186 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.186 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.70 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * This program is free software; you can redistribute it and/or modify
  3  * it under the terms of the GNU General Public License, version 2, as
  4  * published by the Free Software Foundation.
  5  *
  6  * This program is distributed in the hope that it will be useful,
  7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  9  * GNU General Public License for more details.
 10  *
 11  * You should have received a copy of the GNU General Public License
 12  * along with this program; if not, write to the Free Software
 13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 14  *
 15  * Copyright IBM Corp. 2007
 16  *
 17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
 18  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
 19  */
 20 
 21 #include <linux/errno.h>
 22 #include <linux/err.h>
 23 #include <linux/kvm_host.h>
 24 #include <linux/vmalloc.h>
 25 #include <linux/hrtimer.h>
 26 #include <linux/fs.h>
 27 #include <linux/slab.h>
 28 #include <linux/file.h>
 29 #include <linux/module.h>
 30 #include <asm/cputable.h>
 31 #include <asm/uaccess.h>
 32 #include <asm/kvm_ppc.h>
 33 #include <asm/tlbflush.h>
 34 #include <asm/cputhreads.h>
 35 #include <asm/irqflags.h>
 36 #include "timing.h"
 37 #include "irq.h"
 38 #include "../mm/mmu_decl.h"
 39 
 40 #define CREATE_TRACE_POINTS
 41 #include "trace.h"
 42 
 43 struct kvmppc_ops *kvmppc_hv_ops;
 44 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
 45 struct kvmppc_ops *kvmppc_pr_ops;
 46 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
 47 
 48 
 49 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
 50 {
 51         return !!(v->arch.pending_exceptions) ||
 52                v->requests;
 53 }
 54 
 55 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
 56 {
 57         return 1;
 58 }
 59 
 60 /*
 61  * Common checks before entering the guest world.  Call with interrupts
 62  * disabled.
 63  *
 64  * returns:
 65  *
 66  * == 1 if we're ready to go into guest state
 67  * <= 0 if we need to go back to the host with return value
 68  */
 69 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
 70 {
 71         int r;
 72 
 73         WARN_ON(irqs_disabled());
 74         hard_irq_disable();
 75 
 76         while (true) {
 77                 if (need_resched()) {
 78                         local_irq_enable();
 79                         cond_resched();
 80                         hard_irq_disable();
 81                         continue;
 82                 }
 83 
 84                 if (signal_pending(current)) {
 85                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 86                         vcpu->run->exit_reason = KVM_EXIT_INTR;
 87                         r = -EINTR;
 88                         break;
 89                 }
 90 
 91                 vcpu->mode = IN_GUEST_MODE;
 92 
 93                 /*
 94                  * Reading vcpu->requests must happen after setting vcpu->mode,
 95                  * so we don't miss a request because the requester sees
 96                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
 97                  * before next entering the guest (and thus doesn't IPI).
 98                  */
 99                 smp_mb();
100 
101                 if (vcpu->requests) {
102                         /* Make sure we process requests preemptable */
103                         local_irq_enable();
104                         trace_kvm_check_requests(vcpu);
105                         r = kvmppc_core_check_requests(vcpu);
106                         hard_irq_disable();
107                         if (r > 0)
108                                 continue;
109                         break;
110                 }
111 
112                 if (kvmppc_core_prepare_to_enter(vcpu)) {
113                         /* interrupts got enabled in between, so we
114                            are back at square 1 */
115                         continue;
116                 }
117 
118                 kvm_guest_enter();
119                 return 1;
120         }
121 
122         /* return to host */
123         local_irq_enable();
124         return r;
125 }
126 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
127 
128 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
129 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
130 {
131         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
132         int i;
133 
134         shared->sprg0 = swab64(shared->sprg0);
135         shared->sprg1 = swab64(shared->sprg1);
136         shared->sprg2 = swab64(shared->sprg2);
137         shared->sprg3 = swab64(shared->sprg3);
138         shared->srr0 = swab64(shared->srr0);
139         shared->srr1 = swab64(shared->srr1);
140         shared->dar = swab64(shared->dar);
141         shared->msr = swab64(shared->msr);
142         shared->dsisr = swab32(shared->dsisr);
143         shared->int_pending = swab32(shared->int_pending);
144         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
145                 shared->sr[i] = swab32(shared->sr[i]);
146 }
147 #endif
148 
149 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
150 {
151         int nr = kvmppc_get_gpr(vcpu, 11);
152         int r;
153         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
154         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
155         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
156         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
157         unsigned long r2 = 0;
158 
159         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
160                 /* 32 bit mode */
161                 param1 &= 0xffffffff;
162                 param2 &= 0xffffffff;
163                 param3 &= 0xffffffff;
164                 param4 &= 0xffffffff;
165         }
166 
167         switch (nr) {
168         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
169         {
170 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
171                 /* Book3S can be little endian, find it out here */
172                 int shared_big_endian = true;
173                 if (vcpu->arch.intr_msr & MSR_LE)
174                         shared_big_endian = false;
175                 if (shared_big_endian != vcpu->arch.shared_big_endian)
176                         kvmppc_swab_shared(vcpu);
177                 vcpu->arch.shared_big_endian = shared_big_endian;
178 #endif
179 
180                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
181                         /*
182                          * Older versions of the Linux magic page code had
183                          * a bug where they would map their trampoline code
184                          * NX. If that's the case, remove !PR NX capability.
185                          */
186                         vcpu->arch.disable_kernel_nx = true;
187                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
188                 }
189 
190                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
191                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
192 
193 #ifdef CONFIG_PPC_64K_PAGES
194                 /*
195                  * Make sure our 4k magic page is in the same window of a 64k
196                  * page within the guest and within the host's page.
197                  */
198                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
199                     ((ulong)vcpu->arch.shared & 0xf000)) {
200                         void *old_shared = vcpu->arch.shared;
201                         ulong shared = (ulong)vcpu->arch.shared;
202                         void *new_shared;
203 
204                         shared &= PAGE_MASK;
205                         shared |= vcpu->arch.magic_page_pa & 0xf000;
206                         new_shared = (void*)shared;
207                         memcpy(new_shared, old_shared, 0x1000);
208                         vcpu->arch.shared = new_shared;
209                 }
210 #endif
211 
212                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
213 
214                 r = EV_SUCCESS;
215                 break;
216         }
217         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
218                 r = EV_SUCCESS;
219 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
220                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
221 #endif
222 
223                 /* Second return value is in r4 */
224                 break;
225         case EV_HCALL_TOKEN(EV_IDLE):
226                 r = EV_SUCCESS;
227                 kvm_vcpu_block(vcpu);
228                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
229                 break;
230         default:
231                 r = EV_UNIMPLEMENTED;
232                 break;
233         }
234 
235         kvmppc_set_gpr(vcpu, 4, r2);
236 
237         return r;
238 }
239 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
240 
241 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
242 {
243         int r = false;
244 
245         /* We have to know what CPU to virtualize */
246         if (!vcpu->arch.pvr)
247                 goto out;
248 
249         /* PAPR only works with book3s_64 */
250         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
251                 goto out;
252 
253         /* HV KVM can only do PAPR mode for now */
254         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
255                 goto out;
256 
257 #ifdef CONFIG_KVM_BOOKE_HV
258         if (!cpu_has_feature(CPU_FTR_EMB_HV))
259                 goto out;
260 #endif
261 
262         r = true;
263 
264 out:
265         vcpu->arch.sane = r;
266         return r ? 0 : -EINVAL;
267 }
268 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
269 
270 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
271 {
272         enum emulation_result er;
273         int r;
274 
275         er = kvmppc_emulate_loadstore(vcpu);
276         switch (er) {
277         case EMULATE_DONE:
278                 /* Future optimization: only reload non-volatiles if they were
279                  * actually modified. */
280                 r = RESUME_GUEST_NV;
281                 break;
282         case EMULATE_AGAIN:
283                 r = RESUME_GUEST;
284                 break;
285         case EMULATE_DO_MMIO:
286                 run->exit_reason = KVM_EXIT_MMIO;
287                 /* We must reload nonvolatiles because "update" load/store
288                  * instructions modify register state. */
289                 /* Future optimization: only reload non-volatiles if they were
290                  * actually modified. */
291                 r = RESUME_HOST_NV;
292                 break;
293         case EMULATE_FAIL:
294         {
295                 u32 last_inst;
296 
297                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
298                 /* XXX Deliver Program interrupt to guest. */
299                 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
300                 r = RESUME_HOST;
301                 break;
302         }
303         default:
304                 WARN_ON(1);
305                 r = RESUME_GUEST;
306         }
307 
308         return r;
309 }
310 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
311 
312 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
313               bool data)
314 {
315         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
316         struct kvmppc_pte pte;
317         int r;
318 
319         vcpu->stat.st++;
320 
321         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
322                          XLATE_WRITE, &pte);
323         if (r < 0)
324                 return r;
325 
326         *eaddr = pte.raddr;
327 
328         if (!pte.may_write)
329                 return -EPERM;
330 
331         /* Magic page override */
332         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
333             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
334             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
335                 void *magic = vcpu->arch.shared;
336                 magic += pte.eaddr & 0xfff;
337                 memcpy(magic, ptr, size);
338                 return EMULATE_DONE;
339         }
340 
341         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
342                 return EMULATE_DO_MMIO;
343 
344         return EMULATE_DONE;
345 }
346 EXPORT_SYMBOL_GPL(kvmppc_st);
347 
348 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
349                       bool data)
350 {
351         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
352         struct kvmppc_pte pte;
353         int rc;
354 
355         vcpu->stat.ld++;
356 
357         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
358                           XLATE_READ, &pte);
359         if (rc)
360                 return rc;
361 
362         *eaddr = pte.raddr;
363 
364         if (!pte.may_read)
365                 return -EPERM;
366 
367         if (!data && !pte.may_execute)
368                 return -ENOEXEC;
369 
370         /* Magic page override */
371         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
372             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
373             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
374                 void *magic = vcpu->arch.shared;
375                 magic += pte.eaddr & 0xfff;
376                 memcpy(ptr, magic, size);
377                 return EMULATE_DONE;
378         }
379 
380         if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
381                 return EMULATE_DO_MMIO;
382 
383         return EMULATE_DONE;
384 }
385 EXPORT_SYMBOL_GPL(kvmppc_ld);
386 
387 int kvm_arch_hardware_enable(void)
388 {
389         return 0;
390 }
391 
392 int kvm_arch_hardware_setup(void)
393 {
394         return 0;
395 }
396 
397 void kvm_arch_check_processor_compat(void *rtn)
398 {
399         *(int *)rtn = kvmppc_core_check_processor_compat();
400 }
401 
402 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
403 {
404         struct kvmppc_ops *kvm_ops = NULL;
405         /*
406          * if we have both HV and PR enabled, default is HV
407          */
408         if (type == 0) {
409                 if (kvmppc_hv_ops)
410                         kvm_ops = kvmppc_hv_ops;
411                 else
412                         kvm_ops = kvmppc_pr_ops;
413                 if (!kvm_ops)
414                         goto err_out;
415         } else  if (type == KVM_VM_PPC_HV) {
416                 if (!kvmppc_hv_ops)
417                         goto err_out;
418                 kvm_ops = kvmppc_hv_ops;
419         } else if (type == KVM_VM_PPC_PR) {
420                 if (!kvmppc_pr_ops)
421                         goto err_out;
422                 kvm_ops = kvmppc_pr_ops;
423         } else
424                 goto err_out;
425 
426         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
427                 return -ENOENT;
428 
429         kvm->arch.kvm_ops = kvm_ops;
430         return kvmppc_core_init_vm(kvm);
431 err_out:
432         return -EINVAL;
433 }
434 
435 void kvm_arch_destroy_vm(struct kvm *kvm)
436 {
437         unsigned int i;
438         struct kvm_vcpu *vcpu;
439 
440         kvm_for_each_vcpu(i, vcpu, kvm)
441                 kvm_arch_vcpu_free(vcpu);
442 
443         mutex_lock(&kvm->lock);
444         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
445                 kvm->vcpus[i] = NULL;
446 
447         atomic_set(&kvm->online_vcpus, 0);
448 
449         kvmppc_core_destroy_vm(kvm);
450 
451         mutex_unlock(&kvm->lock);
452 
453         /* drop the module reference */
454         module_put(kvm->arch.kvm_ops->owner);
455 }
456 
457 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
458 {
459         int r;
460         /* Assume we're using HV mode when the HV module is loaded */
461         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
462 
463         if (kvm) {
464                 /*
465                  * Hooray - we know which VM type we're running on. Depend on
466                  * that rather than the guess above.
467                  */
468                 hv_enabled = is_kvmppc_hv_enabled(kvm);
469         }
470 
471         switch (ext) {
472 #ifdef CONFIG_BOOKE
473         case KVM_CAP_PPC_BOOKE_SREGS:
474         case KVM_CAP_PPC_BOOKE_WATCHDOG:
475         case KVM_CAP_PPC_EPR:
476 #else
477         case KVM_CAP_PPC_SEGSTATE:
478         case KVM_CAP_PPC_HIOR:
479         case KVM_CAP_PPC_PAPR:
480 #endif
481         case KVM_CAP_PPC_UNSET_IRQ:
482         case KVM_CAP_PPC_IRQ_LEVEL:
483         case KVM_CAP_ENABLE_CAP:
484         case KVM_CAP_ENABLE_CAP_VM:
485         case KVM_CAP_ONE_REG:
486         case KVM_CAP_IOEVENTFD:
487         case KVM_CAP_DEVICE_CTRL:
488                 r = 1;
489                 break;
490         case KVM_CAP_PPC_PAIRED_SINGLES:
491         case KVM_CAP_PPC_OSI:
492         case KVM_CAP_PPC_GET_PVINFO:
493 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
494         case KVM_CAP_SW_TLB:
495 #endif
496                 /* We support this only for PR */
497                 r = !hv_enabled;
498                 break;
499 #ifdef CONFIG_KVM_MMIO
500         case KVM_CAP_COALESCED_MMIO:
501                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
502                 break;
503 #endif
504 #ifdef CONFIG_KVM_MPIC
505         case KVM_CAP_IRQ_MPIC:
506                 r = 1;
507                 break;
508 #endif
509 
510 #ifdef CONFIG_PPC_BOOK3S_64
511         case KVM_CAP_SPAPR_TCE:
512         case KVM_CAP_PPC_ALLOC_HTAB:
513         case KVM_CAP_PPC_RTAS:
514         case KVM_CAP_PPC_FIXUP_HCALL:
515         case KVM_CAP_PPC_ENABLE_HCALL:
516 #ifdef CONFIG_KVM_XICS
517         case KVM_CAP_IRQ_XICS:
518 #endif
519                 r = 1;
520                 break;
521 #endif /* CONFIG_PPC_BOOK3S_64 */
522 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
523         case KVM_CAP_PPC_SMT:
524                 if (hv_enabled)
525                         r = threads_per_subcore;
526                 else
527                         r = 0;
528                 break;
529         case KVM_CAP_PPC_RMA:
530                 r = 0;
531                 break;
532 #endif
533         case KVM_CAP_SYNC_MMU:
534 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
535                 r = hv_enabled;
536 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
537                 r = 1;
538 #else
539                 r = 0;
540 #endif
541                 break;
542 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
543         case KVM_CAP_PPC_HTAB_FD:
544                 r = hv_enabled;
545                 break;
546 #endif
547         case KVM_CAP_NR_VCPUS:
548                 /*
549                  * Recommending a number of CPUs is somewhat arbitrary; we
550                  * return the number of present CPUs for -HV (since a host
551                  * will have secondary threads "offline"), and for other KVM
552                  * implementations just count online CPUs.
553                  */
554                 if (hv_enabled)
555                         r = num_present_cpus();
556                 else
557                         r = num_online_cpus();
558                 break;
559         case KVM_CAP_MAX_VCPUS:
560                 r = KVM_MAX_VCPUS;
561                 break;
562 #ifdef CONFIG_PPC_BOOK3S_64
563         case KVM_CAP_PPC_GET_SMMU_INFO:
564                 r = 1;
565                 break;
566 #endif
567         default:
568                 r = 0;
569                 break;
570         }
571         return r;
572 
573 }
574 
575 long kvm_arch_dev_ioctl(struct file *filp,
576                         unsigned int ioctl, unsigned long arg)
577 {
578         return -EINVAL;
579 }
580 
581 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
582                            struct kvm_memory_slot *dont)
583 {
584         kvmppc_core_free_memslot(kvm, free, dont);
585 }
586 
587 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
588                             unsigned long npages)
589 {
590         return kvmppc_core_create_memslot(kvm, slot, npages);
591 }
592 
593 int kvm_arch_prepare_memory_region(struct kvm *kvm,
594                                    struct kvm_memory_slot *memslot,
595                                    struct kvm_userspace_memory_region *mem,
596                                    enum kvm_mr_change change)
597 {
598         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
599 }
600 
601 void kvm_arch_commit_memory_region(struct kvm *kvm,
602                                    struct kvm_userspace_memory_region *mem,
603                                    const struct kvm_memory_slot *old,
604                                    enum kvm_mr_change change)
605 {
606         kvmppc_core_commit_memory_region(kvm, mem, old);
607 }
608 
609 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
610                                    struct kvm_memory_slot *slot)
611 {
612         kvmppc_core_flush_memslot(kvm, slot);
613 }
614 
615 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
616 {
617         struct kvm_vcpu *vcpu;
618         vcpu = kvmppc_core_vcpu_create(kvm, id);
619         if (!IS_ERR(vcpu)) {
620                 vcpu->arch.wqp = &vcpu->wq;
621                 kvmppc_create_vcpu_debugfs(vcpu, id);
622         }
623         return vcpu;
624 }
625 
626 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
627 {
628         return 0;
629 }
630 
631 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
632 {
633         /* Make sure we're not using the vcpu anymore */
634         hrtimer_cancel(&vcpu->arch.dec_timer);
635 
636         kvmppc_remove_vcpu_debugfs(vcpu);
637 
638         switch (vcpu->arch.irq_type) {
639         case KVMPPC_IRQ_MPIC:
640                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
641                 break;
642         case KVMPPC_IRQ_XICS:
643                 kvmppc_xics_free_icp(vcpu);
644                 break;
645         }
646 
647         kvmppc_core_vcpu_free(vcpu);
648 }
649 
650 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
651 {
652         kvm_arch_vcpu_free(vcpu);
653 }
654 
655 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
656 {
657         return kvmppc_core_pending_dec(vcpu);
658 }
659 
660 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
661 {
662         struct kvm_vcpu *vcpu;
663 
664         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
665         kvmppc_decrementer_func(vcpu);
666 
667         return HRTIMER_NORESTART;
668 }
669 
670 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
671 {
672         int ret;
673 
674         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
675         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
676         vcpu->arch.dec_expires = ~(u64)0;
677 
678 #ifdef CONFIG_KVM_EXIT_TIMING
679         mutex_init(&vcpu->arch.exit_timing_lock);
680 #endif
681         ret = kvmppc_subarch_vcpu_init(vcpu);
682         return ret;
683 }
684 
685 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
686 {
687         kvmppc_mmu_destroy(vcpu);
688         kvmppc_subarch_vcpu_uninit(vcpu);
689 }
690 
691 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
692 {
693 #ifdef CONFIG_BOOKE
694         /*
695          * vrsave (formerly usprg0) isn't used by Linux, but may
696          * be used by the guest.
697          *
698          * On non-booke this is associated with Altivec and
699          * is handled by code in book3s.c.
700          */
701         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
702 #endif
703         kvmppc_core_vcpu_load(vcpu, cpu);
704 }
705 
706 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
707 {
708         kvmppc_core_vcpu_put(vcpu);
709 #ifdef CONFIG_BOOKE
710         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
711 #endif
712 }
713 
714 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
715                                       struct kvm_run *run)
716 {
717         u64 uninitialized_var(gpr);
718 
719         if (run->mmio.len > sizeof(gpr)) {
720                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
721                 return;
722         }
723 
724         if (vcpu->arch.mmio_is_bigendian) {
725                 switch (run->mmio.len) {
726                 case 8: gpr = *(u64 *)run->mmio.data; break;
727                 case 4: gpr = *(u32 *)run->mmio.data; break;
728                 case 2: gpr = *(u16 *)run->mmio.data; break;
729                 case 1: gpr = *(u8 *)run->mmio.data; break;
730                 }
731         } else {
732                 /* Convert BE data from userland back to LE. */
733                 switch (run->mmio.len) {
734                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
735                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
736                 case 1: gpr = *(u8 *)run->mmio.data; break;
737                 }
738         }
739 
740         if (vcpu->arch.mmio_sign_extend) {
741                 switch (run->mmio.len) {
742 #ifdef CONFIG_PPC64
743                 case 4:
744                         gpr = (s64)(s32)gpr;
745                         break;
746 #endif
747                 case 2:
748                         gpr = (s64)(s16)gpr;
749                         break;
750                 case 1:
751                         gpr = (s64)(s8)gpr;
752                         break;
753                 }
754         }
755 
756         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
757 
758         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
759         case KVM_MMIO_REG_GPR:
760                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
761                 break;
762         case KVM_MMIO_REG_FPR:
763                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
764                 break;
765 #ifdef CONFIG_PPC_BOOK3S
766         case KVM_MMIO_REG_QPR:
767                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
768                 break;
769         case KVM_MMIO_REG_FQPR:
770                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
771                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
772                 break;
773 #endif
774         default:
775                 BUG();
776         }
777 }
778 
779 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
780                        unsigned int rt, unsigned int bytes,
781                        int is_default_endian)
782 {
783         int idx, ret;
784         int is_bigendian;
785 
786         if (kvmppc_need_byteswap(vcpu)) {
787                 /* Default endianness is "little endian". */
788                 is_bigendian = !is_default_endian;
789         } else {
790                 /* Default endianness is "big endian". */
791                 is_bigendian = is_default_endian;
792         }
793 
794         if (bytes > sizeof(run->mmio.data)) {
795                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
796                        run->mmio.len);
797         }
798 
799         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
800         run->mmio.len = bytes;
801         run->mmio.is_write = 0;
802 
803         vcpu->arch.io_gpr = rt;
804         vcpu->arch.mmio_is_bigendian = is_bigendian;
805         vcpu->mmio_needed = 1;
806         vcpu->mmio_is_write = 0;
807         vcpu->arch.mmio_sign_extend = 0;
808 
809         idx = srcu_read_lock(&vcpu->kvm->srcu);
810 
811         ret = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
812                               bytes, &run->mmio.data);
813 
814         srcu_read_unlock(&vcpu->kvm->srcu, idx);
815 
816         if (!ret) {
817                 kvmppc_complete_mmio_load(vcpu, run);
818                 vcpu->mmio_needed = 0;
819                 return EMULATE_DONE;
820         }
821 
822         return EMULATE_DO_MMIO;
823 }
824 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
825 
826 /* Same as above, but sign extends */
827 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
828                         unsigned int rt, unsigned int bytes,
829                         int is_default_endian)
830 {
831         int r;
832 
833         vcpu->arch.mmio_sign_extend = 1;
834         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
835 
836         return r;
837 }
838 
839 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
840                         u64 val, unsigned int bytes, int is_default_endian)
841 {
842         void *data = run->mmio.data;
843         int idx, ret;
844         int is_bigendian;
845 
846         if (kvmppc_need_byteswap(vcpu)) {
847                 /* Default endianness is "little endian". */
848                 is_bigendian = !is_default_endian;
849         } else {
850                 /* Default endianness is "big endian". */
851                 is_bigendian = is_default_endian;
852         }
853 
854         if (bytes > sizeof(run->mmio.data)) {
855                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
856                        run->mmio.len);
857         }
858 
859         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
860         run->mmio.len = bytes;
861         run->mmio.is_write = 1;
862         vcpu->mmio_needed = 1;
863         vcpu->mmio_is_write = 1;
864 
865         /* Store the value at the lowest bytes in 'data'. */
866         if (is_bigendian) {
867                 switch (bytes) {
868                 case 8: *(u64 *)data = val; break;
869                 case 4: *(u32 *)data = val; break;
870                 case 2: *(u16 *)data = val; break;
871                 case 1: *(u8  *)data = val; break;
872                 }
873         } else {
874                 /* Store LE value into 'data'. */
875                 switch (bytes) {
876                 case 4: st_le32(data, val); break;
877                 case 2: st_le16(data, val); break;
878                 case 1: *(u8 *)data = val; break;
879                 }
880         }
881 
882         idx = srcu_read_lock(&vcpu->kvm->srcu);
883 
884         ret = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
885                                bytes, &run->mmio.data);
886 
887         srcu_read_unlock(&vcpu->kvm->srcu, idx);
888 
889         if (!ret) {
890                 vcpu->mmio_needed = 0;
891                 return EMULATE_DONE;
892         }
893 
894         return EMULATE_DO_MMIO;
895 }
896 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
897 
898 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
899 {
900         int r = 0;
901         union kvmppc_one_reg val;
902         int size;
903 
904         size = one_reg_size(reg->id);
905         if (size > sizeof(val))
906                 return -EINVAL;
907 
908         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
909         if (r == -EINVAL) {
910                 r = 0;
911                 switch (reg->id) {
912 #ifdef CONFIG_ALTIVEC
913                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
914                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
915                                 r = -ENXIO;
916                                 break;
917                         }
918                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
919                         break;
920                 case KVM_REG_PPC_VSCR:
921                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
922                                 r = -ENXIO;
923                                 break;
924                         }
925                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
926                         break;
927                 case KVM_REG_PPC_VRSAVE:
928                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
929                                 r = -ENXIO;
930                                 break;
931                         }
932                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
933                         break;
934 #endif /* CONFIG_ALTIVEC */
935                 default:
936                         r = -EINVAL;
937                         break;
938                 }
939         }
940 
941         if (r)
942                 return r;
943 
944         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
945                 r = -EFAULT;
946 
947         return r;
948 }
949 
950 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
951 {
952         int r;
953         union kvmppc_one_reg val;
954         int size;
955 
956         size = one_reg_size(reg->id);
957         if (size > sizeof(val))
958                 return -EINVAL;
959 
960         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
961                 return -EFAULT;
962 
963         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
964         if (r == -EINVAL) {
965                 r = 0;
966                 switch (reg->id) {
967 #ifdef CONFIG_ALTIVEC
968                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
969                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
970                                 r = -ENXIO;
971                                 break;
972                         }
973                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
974                         break;
975                 case KVM_REG_PPC_VSCR:
976                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
977                                 r = -ENXIO;
978                                 break;
979                         }
980                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
981                         break;
982                 case KVM_REG_PPC_VRSAVE:
983                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
984                         break;
985 #endif /* CONFIG_ALTIVEC */
986                 default:
987                         r = -EINVAL;
988                         break;
989                 }
990         }
991 
992         return r;
993 }
994 
995 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
996 {
997         int r;
998         sigset_t sigsaved;
999 
1000         if (vcpu->sigset_active)
1001                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
1002 
1003         if (vcpu->mmio_needed) {
1004                 if (!vcpu->mmio_is_write)
1005                         kvmppc_complete_mmio_load(vcpu, run);
1006                 vcpu->mmio_needed = 0;
1007         } else if (vcpu->arch.osi_needed) {
1008                 u64 *gprs = run->osi.gprs;
1009                 int i;
1010 
1011                 for (i = 0; i < 32; i++)
1012                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1013                 vcpu->arch.osi_needed = 0;
1014         } else if (vcpu->arch.hcall_needed) {
1015                 int i;
1016 
1017                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1018                 for (i = 0; i < 9; ++i)
1019                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1020                 vcpu->arch.hcall_needed = 0;
1021 #ifdef CONFIG_BOOKE
1022         } else if (vcpu->arch.epr_needed) {
1023                 kvmppc_set_epr(vcpu, run->epr.epr);
1024                 vcpu->arch.epr_needed = 0;
1025 #endif
1026         }
1027 
1028         r = kvmppc_vcpu_run(run, vcpu);
1029 
1030         if (vcpu->sigset_active)
1031                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1032 
1033         return r;
1034 }
1035 
1036 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1037 {
1038         if (irq->irq == KVM_INTERRUPT_UNSET) {
1039                 kvmppc_core_dequeue_external(vcpu);
1040                 return 0;
1041         }
1042 
1043         kvmppc_core_queue_external(vcpu, irq);
1044 
1045         kvm_vcpu_kick(vcpu);
1046 
1047         return 0;
1048 }
1049 
1050 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1051                                      struct kvm_enable_cap *cap)
1052 {
1053         int r;
1054 
1055         if (cap->flags)
1056                 return -EINVAL;
1057 
1058         switch (cap->cap) {
1059         case KVM_CAP_PPC_OSI:
1060                 r = 0;
1061                 vcpu->arch.osi_enabled = true;
1062                 break;
1063         case KVM_CAP_PPC_PAPR:
1064                 r = 0;
1065                 vcpu->arch.papr_enabled = true;
1066                 break;
1067         case KVM_CAP_PPC_EPR:
1068                 r = 0;
1069                 if (cap->args[0])
1070                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1071                 else
1072                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1073                 break;
1074 #ifdef CONFIG_BOOKE
1075         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1076                 r = 0;
1077                 vcpu->arch.watchdog_enabled = true;
1078                 break;
1079 #endif
1080 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1081         case KVM_CAP_SW_TLB: {
1082                 struct kvm_config_tlb cfg;
1083                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1084 
1085                 r = -EFAULT;
1086                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1087                         break;
1088 
1089                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1090                 break;
1091         }
1092 #endif
1093 #ifdef CONFIG_KVM_MPIC
1094         case KVM_CAP_IRQ_MPIC: {
1095                 struct fd f;
1096                 struct kvm_device *dev;
1097 
1098                 r = -EBADF;
1099                 f = fdget(cap->args[0]);
1100                 if (!f.file)
1101                         break;
1102 
1103                 r = -EPERM;
1104                 dev = kvm_device_from_filp(f.file);
1105                 if (dev)
1106                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1107 
1108                 fdput(f);
1109                 break;
1110         }
1111 #endif
1112 #ifdef CONFIG_KVM_XICS
1113         case KVM_CAP_IRQ_XICS: {
1114                 struct fd f;
1115                 struct kvm_device *dev;
1116 
1117                 r = -EBADF;
1118                 f = fdget(cap->args[0]);
1119                 if (!f.file)
1120                         break;
1121 
1122                 r = -EPERM;
1123                 dev = kvm_device_from_filp(f.file);
1124                 if (dev)
1125                         r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1126 
1127                 fdput(f);
1128                 break;
1129         }
1130 #endif /* CONFIG_KVM_XICS */
1131         default:
1132                 r = -EINVAL;
1133                 break;
1134         }
1135 
1136         if (!r)
1137                 r = kvmppc_sanity_check(vcpu);
1138 
1139         return r;
1140 }
1141 
1142 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1143                                     struct kvm_mp_state *mp_state)
1144 {
1145         return -EINVAL;
1146 }
1147 
1148 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1149                                     struct kvm_mp_state *mp_state)
1150 {
1151         return -EINVAL;
1152 }
1153 
1154 long kvm_arch_vcpu_ioctl(struct file *filp,
1155                          unsigned int ioctl, unsigned long arg)
1156 {
1157         struct kvm_vcpu *vcpu = filp->private_data;
1158         void __user *argp = (void __user *)arg;
1159         long r;
1160 
1161         switch (ioctl) {
1162         case KVM_INTERRUPT: {
1163                 struct kvm_interrupt irq;
1164                 r = -EFAULT;
1165                 if (copy_from_user(&irq, argp, sizeof(irq)))
1166                         goto out;
1167                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1168                 goto out;
1169         }
1170 
1171         case KVM_ENABLE_CAP:
1172         {
1173                 struct kvm_enable_cap cap;
1174                 r = -EFAULT;
1175                 if (copy_from_user(&cap, argp, sizeof(cap)))
1176                         goto out;
1177                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1178                 break;
1179         }
1180 
1181         case KVM_SET_ONE_REG:
1182         case KVM_GET_ONE_REG:
1183         {
1184                 struct kvm_one_reg reg;
1185                 r = -EFAULT;
1186                 if (copy_from_user(&reg, argp, sizeof(reg)))
1187                         goto out;
1188                 if (ioctl == KVM_SET_ONE_REG)
1189                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1190                 else
1191                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1192                 break;
1193         }
1194 
1195 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1196         case KVM_DIRTY_TLB: {
1197                 struct kvm_dirty_tlb dirty;
1198                 r = -EFAULT;
1199                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1200                         goto out;
1201                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1202                 break;
1203         }
1204 #endif
1205         default:
1206                 r = -EINVAL;
1207         }
1208 
1209 out:
1210         return r;
1211 }
1212 
1213 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1214 {
1215         return VM_FAULT_SIGBUS;
1216 }
1217 
1218 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1219 {
1220         u32 inst_nop = 0x60000000;
1221 #ifdef CONFIG_KVM_BOOKE_HV
1222         u32 inst_sc1 = 0x44000022;
1223         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1224         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1225         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1226         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1227 #else
1228         u32 inst_lis = 0x3c000000;
1229         u32 inst_ori = 0x60000000;
1230         u32 inst_sc = 0x44000002;
1231         u32 inst_imm_mask = 0xffff;
1232 
1233         /*
1234          * The hypercall to get into KVM from within guest context is as
1235          * follows:
1236          *
1237          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1238          *    ori r0, KVM_SC_MAGIC_R0@l
1239          *    sc
1240          *    nop
1241          */
1242         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1243         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1244         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1245         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1246 #endif
1247 
1248         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1249 
1250         return 0;
1251 }
1252 
1253 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1254                           bool line_status)
1255 {
1256         if (!irqchip_in_kernel(kvm))
1257                 return -ENXIO;
1258 
1259         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1260                                         irq_event->irq, irq_event->level,
1261                                         line_status);
1262         return 0;
1263 }
1264 
1265 
1266 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1267                                    struct kvm_enable_cap *cap)
1268 {
1269         int r;
1270 
1271         if (cap->flags)
1272                 return -EINVAL;
1273 
1274         switch (cap->cap) {
1275 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1276         case KVM_CAP_PPC_ENABLE_HCALL: {
1277                 unsigned long hcall = cap->args[0];
1278 
1279                 r = -EINVAL;
1280                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1281                     cap->args[1] > 1)
1282                         break;
1283                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1284                         break;
1285                 if (cap->args[1])
1286                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1287                 else
1288                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1289                 r = 0;
1290                 break;
1291         }
1292 #endif
1293         default:
1294                 r = -EINVAL;
1295                 break;
1296         }
1297 
1298         return r;
1299 }
1300 
1301 long kvm_arch_vm_ioctl(struct file *filp,
1302                        unsigned int ioctl, unsigned long arg)
1303 {
1304         struct kvm *kvm __maybe_unused = filp->private_data;
1305         void __user *argp = (void __user *)arg;
1306         long r;
1307 
1308         switch (ioctl) {
1309         case KVM_PPC_GET_PVINFO: {
1310                 struct kvm_ppc_pvinfo pvinfo;
1311                 memset(&pvinfo, 0, sizeof(pvinfo));
1312                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1313                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1314                         r = -EFAULT;
1315                         goto out;
1316                 }
1317 
1318                 break;
1319         }
1320         case KVM_ENABLE_CAP:
1321         {
1322                 struct kvm_enable_cap cap;
1323                 r = -EFAULT;
1324                 if (copy_from_user(&cap, argp, sizeof(cap)))
1325                         goto out;
1326                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1327                 break;
1328         }
1329 #ifdef CONFIG_PPC_BOOK3S_64
1330         case KVM_CREATE_SPAPR_TCE: {
1331                 struct kvm_create_spapr_tce create_tce;
1332 
1333                 r = -EFAULT;
1334                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1335                         goto out;
1336                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
1337                 goto out;
1338         }
1339         case KVM_PPC_GET_SMMU_INFO: {
1340                 struct kvm_ppc_smmu_info info;
1341                 struct kvm *kvm = filp->private_data;
1342 
1343                 memset(&info, 0, sizeof(info));
1344                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1345                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1346                         r = -EFAULT;
1347                 break;
1348         }
1349         case KVM_PPC_RTAS_DEFINE_TOKEN: {
1350                 struct kvm *kvm = filp->private_data;
1351 
1352                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1353                 break;
1354         }
1355         default: {
1356                 struct kvm *kvm = filp->private_data;
1357                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1358         }
1359 #else /* CONFIG_PPC_BOOK3S_64 */
1360         default:
1361                 r = -ENOTTY;
1362 #endif
1363         }
1364 out:
1365         return r;
1366 }
1367 
1368 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1369 static unsigned long nr_lpids;
1370 
1371 long kvmppc_alloc_lpid(void)
1372 {
1373         long lpid;
1374 
1375         do {
1376                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1377                 if (lpid >= nr_lpids) {
1378                         pr_err("%s: No LPIDs free\n", __func__);
1379                         return -ENOMEM;
1380                 }
1381         } while (test_and_set_bit(lpid, lpid_inuse));
1382 
1383         return lpid;
1384 }
1385 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1386 
1387 void kvmppc_claim_lpid(long lpid)
1388 {
1389         set_bit(lpid, lpid_inuse);
1390 }
1391 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1392 
1393 void kvmppc_free_lpid(long lpid)
1394 {
1395         clear_bit(lpid, lpid_inuse);
1396 }
1397 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1398 
1399 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1400 {
1401         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1402         memset(lpid_inuse, 0, sizeof(lpid_inuse));
1403 }
1404 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1405 
1406 int kvm_arch_init(void *opaque)
1407 {
1408         return 0;
1409 }
1410 
1411 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);
1412 

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