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

Version: ~ [ linux-5.4-rc3 ] ~ [ linux-5.3.6 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.79 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.149 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.196 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.196 ] ~ [ 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-3.16.75 ] ~ [ 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-2.6.32.71 ] ~ [ 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 <asm/iommu.h>
 37 #include "timing.h"
 38 #include "irq.h"
 39 #include "../mm/mmu_decl.h"
 40 
 41 #define CREATE_TRACE_POINTS
 42 #include "trace.h"
 43 
 44 struct kvmppc_ops *kvmppc_hv_ops;
 45 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
 46 struct kvmppc_ops *kvmppc_pr_ops;
 47 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
 48 
 49 
 50 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
 51 {
 52         return !!(v->arch.pending_exceptions) ||
 53                v->requests;
 54 }
 55 
 56 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
 57 {
 58         return 1;
 59 }
 60 
 61 /*
 62  * Common checks before entering the guest world.  Call with interrupts
 63  * disabled.
 64  *
 65  * returns:
 66  *
 67  * == 1 if we're ready to go into guest state
 68  * <= 0 if we need to go back to the host with return value
 69  */
 70 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
 71 {
 72         int r;
 73 
 74         WARN_ON(irqs_disabled());
 75         hard_irq_disable();
 76 
 77         while (true) {
 78                 if (need_resched()) {
 79                         local_irq_enable();
 80                         cond_resched();
 81                         hard_irq_disable();
 82                         continue;
 83                 }
 84 
 85                 if (signal_pending(current)) {
 86                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 87                         vcpu->run->exit_reason = KVM_EXIT_INTR;
 88                         r = -EINTR;
 89                         break;
 90                 }
 91 
 92                 vcpu->mode = IN_GUEST_MODE;
 93 
 94                 /*
 95                  * Reading vcpu->requests must happen after setting vcpu->mode,
 96                  * so we don't miss a request because the requester sees
 97                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
 98                  * before next entering the guest (and thus doesn't IPI).
 99                  * This also orders the write to mode from any reads
100                  * to the page tables done while the VCPU is running.
101                  * Please see the comment in kvm_flush_remote_tlbs.
102                  */
103                 smp_mb();
104 
105                 if (vcpu->requests) {
106                         /* Make sure we process requests preemptable */
107                         local_irq_enable();
108                         trace_kvm_check_requests(vcpu);
109                         r = kvmppc_core_check_requests(vcpu);
110                         hard_irq_disable();
111                         if (r > 0)
112                                 continue;
113                         break;
114                 }
115 
116                 if (kvmppc_core_prepare_to_enter(vcpu)) {
117                         /* interrupts got enabled in between, so we
118                            are back at square 1 */
119                         continue;
120                 }
121 
122                 guest_enter_irqoff();
123                 return 1;
124         }
125 
126         /* return to host */
127         local_irq_enable();
128         return r;
129 }
130 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
131 
132 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
133 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
134 {
135         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
136         int i;
137 
138         shared->sprg0 = swab64(shared->sprg0);
139         shared->sprg1 = swab64(shared->sprg1);
140         shared->sprg2 = swab64(shared->sprg2);
141         shared->sprg3 = swab64(shared->sprg3);
142         shared->srr0 = swab64(shared->srr0);
143         shared->srr1 = swab64(shared->srr1);
144         shared->dar = swab64(shared->dar);
145         shared->msr = swab64(shared->msr);
146         shared->dsisr = swab32(shared->dsisr);
147         shared->int_pending = swab32(shared->int_pending);
148         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
149                 shared->sr[i] = swab32(shared->sr[i]);
150 }
151 #endif
152 
153 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
154 {
155         int nr = kvmppc_get_gpr(vcpu, 11);
156         int r;
157         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
158         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
159         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
160         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
161         unsigned long r2 = 0;
162 
163         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
164                 /* 32 bit mode */
165                 param1 &= 0xffffffff;
166                 param2 &= 0xffffffff;
167                 param3 &= 0xffffffff;
168                 param4 &= 0xffffffff;
169         }
170 
171         switch (nr) {
172         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
173         {
174 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
175                 /* Book3S can be little endian, find it out here */
176                 int shared_big_endian = true;
177                 if (vcpu->arch.intr_msr & MSR_LE)
178                         shared_big_endian = false;
179                 if (shared_big_endian != vcpu->arch.shared_big_endian)
180                         kvmppc_swab_shared(vcpu);
181                 vcpu->arch.shared_big_endian = shared_big_endian;
182 #endif
183 
184                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
185                         /*
186                          * Older versions of the Linux magic page code had
187                          * a bug where they would map their trampoline code
188                          * NX. If that's the case, remove !PR NX capability.
189                          */
190                         vcpu->arch.disable_kernel_nx = true;
191                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
192                 }
193 
194                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
195                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
196 
197 #ifdef CONFIG_PPC_64K_PAGES
198                 /*
199                  * Make sure our 4k magic page is in the same window of a 64k
200                  * page within the guest and within the host's page.
201                  */
202                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
203                     ((ulong)vcpu->arch.shared & 0xf000)) {
204                         void *old_shared = vcpu->arch.shared;
205                         ulong shared = (ulong)vcpu->arch.shared;
206                         void *new_shared;
207 
208                         shared &= PAGE_MASK;
209                         shared |= vcpu->arch.magic_page_pa & 0xf000;
210                         new_shared = (void*)shared;
211                         memcpy(new_shared, old_shared, 0x1000);
212                         vcpu->arch.shared = new_shared;
213                 }
214 #endif
215 
216                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
217 
218                 r = EV_SUCCESS;
219                 break;
220         }
221         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
222                 r = EV_SUCCESS;
223 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
224                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
225 #endif
226 
227                 /* Second return value is in r4 */
228                 break;
229         case EV_HCALL_TOKEN(EV_IDLE):
230                 r = EV_SUCCESS;
231                 kvm_vcpu_block(vcpu);
232                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
233                 break;
234         default:
235                 r = EV_UNIMPLEMENTED;
236                 break;
237         }
238 
239         kvmppc_set_gpr(vcpu, 4, r2);
240 
241         return r;
242 }
243 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
244 
245 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
246 {
247         int r = false;
248 
249         /* We have to know what CPU to virtualize */
250         if (!vcpu->arch.pvr)
251                 goto out;
252 
253         /* PAPR only works with book3s_64 */
254         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
255                 goto out;
256 
257         /* HV KVM can only do PAPR mode for now */
258         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
259                 goto out;
260 
261 #ifdef CONFIG_KVM_BOOKE_HV
262         if (!cpu_has_feature(CPU_FTR_EMB_HV))
263                 goto out;
264 #endif
265 
266         r = true;
267 
268 out:
269         vcpu->arch.sane = r;
270         return r ? 0 : -EINVAL;
271 }
272 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
273 
274 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
275 {
276         enum emulation_result er;
277         int r;
278 
279         er = kvmppc_emulate_loadstore(vcpu);
280         switch (er) {
281         case EMULATE_DONE:
282                 /* Future optimization: only reload non-volatiles if they were
283                  * actually modified. */
284                 r = RESUME_GUEST_NV;
285                 break;
286         case EMULATE_AGAIN:
287                 r = RESUME_GUEST;
288                 break;
289         case EMULATE_DO_MMIO:
290                 run->exit_reason = KVM_EXIT_MMIO;
291                 /* We must reload nonvolatiles because "update" load/store
292                  * instructions modify register state. */
293                 /* Future optimization: only reload non-volatiles if they were
294                  * actually modified. */
295                 r = RESUME_HOST_NV;
296                 break;
297         case EMULATE_FAIL:
298         {
299                 u32 last_inst;
300 
301                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
302                 /* XXX Deliver Program interrupt to guest. */
303                 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
304                 r = RESUME_HOST;
305                 break;
306         }
307         default:
308                 WARN_ON(1);
309                 r = RESUME_GUEST;
310         }
311 
312         return r;
313 }
314 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
315 
316 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
317               bool data)
318 {
319         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
320         struct kvmppc_pte pte;
321         int r;
322 
323         vcpu->stat.st++;
324 
325         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
326                          XLATE_WRITE, &pte);
327         if (r < 0)
328                 return r;
329 
330         *eaddr = pte.raddr;
331 
332         if (!pte.may_write)
333                 return -EPERM;
334 
335         /* Magic page override */
336         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
337             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
338             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
339                 void *magic = vcpu->arch.shared;
340                 magic += pte.eaddr & 0xfff;
341                 memcpy(magic, ptr, size);
342                 return EMULATE_DONE;
343         }
344 
345         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
346                 return EMULATE_DO_MMIO;
347 
348         return EMULATE_DONE;
349 }
350 EXPORT_SYMBOL_GPL(kvmppc_st);
351 
352 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
353                       bool data)
354 {
355         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
356         struct kvmppc_pte pte;
357         int rc;
358 
359         vcpu->stat.ld++;
360 
361         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
362                           XLATE_READ, &pte);
363         if (rc)
364                 return rc;
365 
366         *eaddr = pte.raddr;
367 
368         if (!pte.may_read)
369                 return -EPERM;
370 
371         if (!data && !pte.may_execute)
372                 return -ENOEXEC;
373 
374         /* Magic page override */
375         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
376             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
377             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
378                 void *magic = vcpu->arch.shared;
379                 magic += pte.eaddr & 0xfff;
380                 memcpy(ptr, magic, size);
381                 return EMULATE_DONE;
382         }
383 
384         if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
385                 return EMULATE_DO_MMIO;
386 
387         return EMULATE_DONE;
388 }
389 EXPORT_SYMBOL_GPL(kvmppc_ld);
390 
391 int kvm_arch_hardware_enable(void)
392 {
393         return 0;
394 }
395 
396 int kvm_arch_hardware_setup(void)
397 {
398         return 0;
399 }
400 
401 void kvm_arch_check_processor_compat(void *rtn)
402 {
403         *(int *)rtn = kvmppc_core_check_processor_compat();
404 }
405 
406 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
407 {
408         struct kvmppc_ops *kvm_ops = NULL;
409         /*
410          * if we have both HV and PR enabled, default is HV
411          */
412         if (type == 0) {
413                 if (kvmppc_hv_ops)
414                         kvm_ops = kvmppc_hv_ops;
415                 else
416                         kvm_ops = kvmppc_pr_ops;
417                 if (!kvm_ops)
418                         goto err_out;
419         } else  if (type == KVM_VM_PPC_HV) {
420                 if (!kvmppc_hv_ops)
421                         goto err_out;
422                 kvm_ops = kvmppc_hv_ops;
423         } else if (type == KVM_VM_PPC_PR) {
424                 if (!kvmppc_pr_ops)
425                         goto err_out;
426                 kvm_ops = kvmppc_pr_ops;
427         } else
428                 goto err_out;
429 
430         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
431                 return -ENOENT;
432 
433         kvm->arch.kvm_ops = kvm_ops;
434         return kvmppc_core_init_vm(kvm);
435 err_out:
436         return -EINVAL;
437 }
438 
439 void kvm_arch_destroy_vm(struct kvm *kvm)
440 {
441         unsigned int i;
442         struct kvm_vcpu *vcpu;
443 
444 #ifdef CONFIG_KVM_XICS
445         /*
446          * We call kick_all_cpus_sync() to ensure that all
447          * CPUs have executed any pending IPIs before we
448          * continue and free VCPUs structures below.
449          */
450         if (is_kvmppc_hv_enabled(kvm))
451                 kick_all_cpus_sync();
452 #endif
453 
454         kvm_for_each_vcpu(i, vcpu, kvm)
455                 kvm_arch_vcpu_free(vcpu);
456 
457         mutex_lock(&kvm->lock);
458         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
459                 kvm->vcpus[i] = NULL;
460 
461         atomic_set(&kvm->online_vcpus, 0);
462 
463         kvmppc_core_destroy_vm(kvm);
464 
465         mutex_unlock(&kvm->lock);
466 
467         /* drop the module reference */
468         module_put(kvm->arch.kvm_ops->owner);
469 }
470 
471 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
472 {
473         int r;
474         /* Assume we're using HV mode when the HV module is loaded */
475         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
476 
477         if (kvm) {
478                 /*
479                  * Hooray - we know which VM type we're running on. Depend on
480                  * that rather than the guess above.
481                  */
482                 hv_enabled = is_kvmppc_hv_enabled(kvm);
483         }
484 
485         switch (ext) {
486 #ifdef CONFIG_BOOKE
487         case KVM_CAP_PPC_BOOKE_SREGS:
488         case KVM_CAP_PPC_BOOKE_WATCHDOG:
489         case KVM_CAP_PPC_EPR:
490 #else
491         case KVM_CAP_PPC_SEGSTATE:
492         case KVM_CAP_PPC_HIOR:
493         case KVM_CAP_PPC_PAPR:
494 #endif
495         case KVM_CAP_PPC_UNSET_IRQ:
496         case KVM_CAP_PPC_IRQ_LEVEL:
497         case KVM_CAP_ENABLE_CAP:
498         case KVM_CAP_ENABLE_CAP_VM:
499         case KVM_CAP_ONE_REG:
500         case KVM_CAP_IOEVENTFD:
501         case KVM_CAP_DEVICE_CTRL:
502                 r = 1;
503                 break;
504         case KVM_CAP_PPC_PAIRED_SINGLES:
505         case KVM_CAP_PPC_OSI:
506         case KVM_CAP_PPC_GET_PVINFO:
507 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
508         case KVM_CAP_SW_TLB:
509 #endif
510                 /* We support this only for PR */
511                 r = !hv_enabled;
512                 break;
513 #ifdef CONFIG_KVM_MMIO
514         case KVM_CAP_COALESCED_MMIO:
515                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
516                 break;
517 #endif
518 #ifdef CONFIG_KVM_MPIC
519         case KVM_CAP_IRQ_MPIC:
520                 r = 1;
521                 break;
522 #endif
523 
524 #ifdef CONFIG_PPC_BOOK3S_64
525         case KVM_CAP_SPAPR_TCE:
526         case KVM_CAP_SPAPR_TCE_64:
527         case KVM_CAP_PPC_ALLOC_HTAB:
528         case KVM_CAP_PPC_RTAS:
529         case KVM_CAP_PPC_FIXUP_HCALL:
530         case KVM_CAP_PPC_ENABLE_HCALL:
531 #ifdef CONFIG_KVM_XICS
532         case KVM_CAP_IRQ_XICS:
533 #endif
534                 r = 1;
535                 break;
536 #endif /* CONFIG_PPC_BOOK3S_64 */
537 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
538         case KVM_CAP_PPC_SMT:
539                 if (hv_enabled)
540                         r = threads_per_subcore;
541                 else
542                         r = 0;
543                 break;
544         case KVM_CAP_PPC_RMA:
545                 r = 0;
546                 break;
547         case KVM_CAP_PPC_HWRNG:
548                 r = kvmppc_hwrng_present();
549                 break;
550 #endif
551         case KVM_CAP_SYNC_MMU:
552 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
553                 r = hv_enabled;
554 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
555                 r = 1;
556 #else
557                 r = 0;
558 #endif
559                 break;
560 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
561         case KVM_CAP_PPC_HTAB_FD:
562                 r = hv_enabled;
563                 break;
564 #endif
565         case KVM_CAP_NR_VCPUS:
566                 /*
567                  * Recommending a number of CPUs is somewhat arbitrary; we
568                  * return the number of present CPUs for -HV (since a host
569                  * will have secondary threads "offline"), and for other KVM
570                  * implementations just count online CPUs.
571                  */
572                 if (hv_enabled)
573                         r = num_present_cpus();
574                 else
575                         r = num_online_cpus();
576                 break;
577         case KVM_CAP_NR_MEMSLOTS:
578                 r = KVM_USER_MEM_SLOTS;
579                 break;
580         case KVM_CAP_MAX_VCPUS:
581                 r = KVM_MAX_VCPUS;
582                 break;
583 #ifdef CONFIG_PPC_BOOK3S_64
584         case KVM_CAP_PPC_GET_SMMU_INFO:
585                 r = 1;
586                 break;
587         case KVM_CAP_SPAPR_MULTITCE:
588                 r = 1;
589                 break;
590 #endif
591         case KVM_CAP_PPC_HTM:
592                 r = cpu_has_feature(CPU_FTR_TM_COMP) &&
593                     is_kvmppc_hv_enabled(kvm);
594                 break;
595         default:
596                 r = 0;
597                 break;
598         }
599         return r;
600 
601 }
602 
603 long kvm_arch_dev_ioctl(struct file *filp,
604                         unsigned int ioctl, unsigned long arg)
605 {
606         return -EINVAL;
607 }
608 
609 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
610                            struct kvm_memory_slot *dont)
611 {
612         kvmppc_core_free_memslot(kvm, free, dont);
613 }
614 
615 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
616                             unsigned long npages)
617 {
618         return kvmppc_core_create_memslot(kvm, slot, npages);
619 }
620 
621 int kvm_arch_prepare_memory_region(struct kvm *kvm,
622                                    struct kvm_memory_slot *memslot,
623                                    const struct kvm_userspace_memory_region *mem,
624                                    enum kvm_mr_change change)
625 {
626         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
627 }
628 
629 void kvm_arch_commit_memory_region(struct kvm *kvm,
630                                    const struct kvm_userspace_memory_region *mem,
631                                    const struct kvm_memory_slot *old,
632                                    const struct kvm_memory_slot *new,
633                                    enum kvm_mr_change change)
634 {
635         kvmppc_core_commit_memory_region(kvm, mem, old, new);
636 }
637 
638 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
639                                    struct kvm_memory_slot *slot)
640 {
641         kvmppc_core_flush_memslot(kvm, slot);
642 }
643 
644 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
645 {
646         struct kvm_vcpu *vcpu;
647         vcpu = kvmppc_core_vcpu_create(kvm, id);
648         if (!IS_ERR(vcpu)) {
649                 vcpu->arch.wqp = &vcpu->wq;
650                 kvmppc_create_vcpu_debugfs(vcpu, id);
651         }
652         return vcpu;
653 }
654 
655 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
656 {
657 }
658 
659 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
660 {
661         /* Make sure we're not using the vcpu anymore */
662         hrtimer_cancel(&vcpu->arch.dec_timer);
663 
664         kvmppc_remove_vcpu_debugfs(vcpu);
665 
666         switch (vcpu->arch.irq_type) {
667         case KVMPPC_IRQ_MPIC:
668                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
669                 break;
670         case KVMPPC_IRQ_XICS:
671                 kvmppc_xics_free_icp(vcpu);
672                 break;
673         }
674 
675         kvmppc_core_vcpu_free(vcpu);
676 }
677 
678 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
679 {
680         kvm_arch_vcpu_free(vcpu);
681 }
682 
683 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
684 {
685         return kvmppc_core_pending_dec(vcpu);
686 }
687 
688 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
689 {
690         struct kvm_vcpu *vcpu;
691 
692         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
693         kvmppc_decrementer_func(vcpu);
694 
695         return HRTIMER_NORESTART;
696 }
697 
698 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
699 {
700         int ret;
701 
702         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
703         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
704         vcpu->arch.dec_expires = ~(u64)0;
705 
706 #ifdef CONFIG_KVM_EXIT_TIMING
707         mutex_init(&vcpu->arch.exit_timing_lock);
708 #endif
709         ret = kvmppc_subarch_vcpu_init(vcpu);
710         return ret;
711 }
712 
713 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
714 {
715         kvmppc_mmu_destroy(vcpu);
716         kvmppc_subarch_vcpu_uninit(vcpu);
717 }
718 
719 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
720 {
721 #ifdef CONFIG_BOOKE
722         /*
723          * vrsave (formerly usprg0) isn't used by Linux, but may
724          * be used by the guest.
725          *
726          * On non-booke this is associated with Altivec and
727          * is handled by code in book3s.c.
728          */
729         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
730 #endif
731         kvmppc_core_vcpu_load(vcpu, cpu);
732 }
733 
734 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
735 {
736         kvmppc_core_vcpu_put(vcpu);
737 #ifdef CONFIG_BOOKE
738         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
739 #endif
740 }
741 
742 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
743                                       struct kvm_run *run)
744 {
745         u64 uninitialized_var(gpr);
746 
747         if (run->mmio.len > sizeof(gpr)) {
748                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
749                 return;
750         }
751 
752         if (!vcpu->arch.mmio_host_swabbed) {
753                 switch (run->mmio.len) {
754                 case 8: gpr = *(u64 *)run->mmio.data; break;
755                 case 4: gpr = *(u32 *)run->mmio.data; break;
756                 case 2: gpr = *(u16 *)run->mmio.data; break;
757                 case 1: gpr = *(u8 *)run->mmio.data; break;
758                 }
759         } else {
760                 switch (run->mmio.len) {
761                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
762                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
763                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
764                 case 1: gpr = *(u8 *)run->mmio.data; break;
765                 }
766         }
767 
768         if (vcpu->arch.mmio_sign_extend) {
769                 switch (run->mmio.len) {
770 #ifdef CONFIG_PPC64
771                 case 4:
772                         gpr = (s64)(s32)gpr;
773                         break;
774 #endif
775                 case 2:
776                         gpr = (s64)(s16)gpr;
777                         break;
778                 case 1:
779                         gpr = (s64)(s8)gpr;
780                         break;
781                 }
782         }
783 
784         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
785 
786         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
787         case KVM_MMIO_REG_GPR:
788                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
789                 break;
790         case KVM_MMIO_REG_FPR:
791                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
792                 break;
793 #ifdef CONFIG_PPC_BOOK3S
794         case KVM_MMIO_REG_QPR:
795                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
796                 break;
797         case KVM_MMIO_REG_FQPR:
798                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
799                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
800                 break;
801 #endif
802         default:
803                 BUG();
804         }
805 }
806 
807 static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
808                                 unsigned int rt, unsigned int bytes,
809                                 int is_default_endian, int sign_extend)
810 {
811         int idx, ret;
812         bool host_swabbed;
813 
814         /* Pity C doesn't have a logical XOR operator */
815         if (kvmppc_need_byteswap(vcpu)) {
816                 host_swabbed = is_default_endian;
817         } else {
818                 host_swabbed = !is_default_endian;
819         }
820 
821         if (bytes > sizeof(run->mmio.data)) {
822                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
823                        run->mmio.len);
824         }
825 
826         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
827         run->mmio.len = bytes;
828         run->mmio.is_write = 0;
829 
830         vcpu->arch.io_gpr = rt;
831         vcpu->arch.mmio_host_swabbed = host_swabbed;
832         vcpu->mmio_needed = 1;
833         vcpu->mmio_is_write = 0;
834         vcpu->arch.mmio_sign_extend = sign_extend;
835 
836         idx = srcu_read_lock(&vcpu->kvm->srcu);
837 
838         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
839                               bytes, &run->mmio.data);
840 
841         srcu_read_unlock(&vcpu->kvm->srcu, idx);
842 
843         if (!ret) {
844                 kvmppc_complete_mmio_load(vcpu, run);
845                 vcpu->mmio_needed = 0;
846                 return EMULATE_DONE;
847         }
848 
849         return EMULATE_DO_MMIO;
850 }
851 
852 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
853                        unsigned int rt, unsigned int bytes,
854                        int is_default_endian)
855 {
856         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0);
857 }
858 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
859 
860 /* Same as above, but sign extends */
861 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
862                         unsigned int rt, unsigned int bytes,
863                         int is_default_endian)
864 {
865         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
866 }
867 
868 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
869                         u64 val, unsigned int bytes, int is_default_endian)
870 {
871         void *data = run->mmio.data;
872         int idx, ret;
873         bool host_swabbed;
874 
875         /* Pity C doesn't have a logical XOR operator */
876         if (kvmppc_need_byteswap(vcpu)) {
877                 host_swabbed = is_default_endian;
878         } else {
879                 host_swabbed = !is_default_endian;
880         }
881 
882         if (bytes > sizeof(run->mmio.data)) {
883                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
884                        run->mmio.len);
885         }
886 
887         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
888         run->mmio.len = bytes;
889         run->mmio.is_write = 1;
890         vcpu->mmio_needed = 1;
891         vcpu->mmio_is_write = 1;
892 
893         /* Store the value at the lowest bytes in 'data'. */
894         if (!host_swabbed) {
895                 switch (bytes) {
896                 case 8: *(u64 *)data = val; break;
897                 case 4: *(u32 *)data = val; break;
898                 case 2: *(u16 *)data = val; break;
899                 case 1: *(u8  *)data = val; break;
900                 }
901         } else {
902                 switch (bytes) {
903                 case 8: *(u64 *)data = swab64(val); break;
904                 case 4: *(u32 *)data = swab32(val); break;
905                 case 2: *(u16 *)data = swab16(val); break;
906                 case 1: *(u8  *)data = val; break;
907                 }
908         }
909 
910         idx = srcu_read_lock(&vcpu->kvm->srcu);
911 
912         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
913                                bytes, &run->mmio.data);
914 
915         srcu_read_unlock(&vcpu->kvm->srcu, idx);
916 
917         if (!ret) {
918                 vcpu->mmio_needed = 0;
919                 return EMULATE_DONE;
920         }
921 
922         return EMULATE_DO_MMIO;
923 }
924 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
925 
926 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
927 {
928         int r = 0;
929         union kvmppc_one_reg val;
930         int size;
931 
932         size = one_reg_size(reg->id);
933         if (size > sizeof(val))
934                 return -EINVAL;
935 
936         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
937         if (r == -EINVAL) {
938                 r = 0;
939                 switch (reg->id) {
940 #ifdef CONFIG_ALTIVEC
941                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
942                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
943                                 r = -ENXIO;
944                                 break;
945                         }
946                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
947                         break;
948                 case KVM_REG_PPC_VSCR:
949                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
950                                 r = -ENXIO;
951                                 break;
952                         }
953                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
954                         break;
955                 case KVM_REG_PPC_VRSAVE:
956                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
957                         break;
958 #endif /* CONFIG_ALTIVEC */
959                 default:
960                         r = -EINVAL;
961                         break;
962                 }
963         }
964 
965         if (r)
966                 return r;
967 
968         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
969                 r = -EFAULT;
970 
971         return r;
972 }
973 
974 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
975 {
976         int r;
977         union kvmppc_one_reg val;
978         int size;
979 
980         size = one_reg_size(reg->id);
981         if (size > sizeof(val))
982                 return -EINVAL;
983 
984         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
985                 return -EFAULT;
986 
987         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
988         if (r == -EINVAL) {
989                 r = 0;
990                 switch (reg->id) {
991 #ifdef CONFIG_ALTIVEC
992                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
993                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
994                                 r = -ENXIO;
995                                 break;
996                         }
997                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
998                         break;
999                 case KVM_REG_PPC_VSCR:
1000                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1001                                 r = -ENXIO;
1002                                 break;
1003                         }
1004                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1005                         break;
1006                 case KVM_REG_PPC_VRSAVE:
1007                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1008                                 r = -ENXIO;
1009                                 break;
1010                         }
1011                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
1012                         break;
1013 #endif /* CONFIG_ALTIVEC */
1014                 default:
1015                         r = -EINVAL;
1016                         break;
1017                 }
1018         }
1019 
1020         return r;
1021 }
1022 
1023 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
1024 {
1025         int r;
1026         sigset_t sigsaved;
1027 
1028         if (vcpu->sigset_active)
1029                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
1030 
1031         if (vcpu->mmio_needed) {
1032                 if (!vcpu->mmio_is_write)
1033                         kvmppc_complete_mmio_load(vcpu, run);
1034                 vcpu->mmio_needed = 0;
1035         } else if (vcpu->arch.osi_needed) {
1036                 u64 *gprs = run->osi.gprs;
1037                 int i;
1038 
1039                 for (i = 0; i < 32; i++)
1040                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1041                 vcpu->arch.osi_needed = 0;
1042         } else if (vcpu->arch.hcall_needed) {
1043                 int i;
1044 
1045                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1046                 for (i = 0; i < 9; ++i)
1047                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1048                 vcpu->arch.hcall_needed = 0;
1049 #ifdef CONFIG_BOOKE
1050         } else if (vcpu->arch.epr_needed) {
1051                 kvmppc_set_epr(vcpu, run->epr.epr);
1052                 vcpu->arch.epr_needed = 0;
1053 #endif
1054         }
1055 
1056         r = kvmppc_vcpu_run(run, vcpu);
1057 
1058         if (vcpu->sigset_active)
1059                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1060 
1061         return r;
1062 }
1063 
1064 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1065 {
1066         if (irq->irq == KVM_INTERRUPT_UNSET) {
1067                 kvmppc_core_dequeue_external(vcpu);
1068                 return 0;
1069         }
1070 
1071         kvmppc_core_queue_external(vcpu, irq);
1072 
1073         kvm_vcpu_kick(vcpu);
1074 
1075         return 0;
1076 }
1077 
1078 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1079                                      struct kvm_enable_cap *cap)
1080 {
1081         int r;
1082 
1083         if (cap->flags)
1084                 return -EINVAL;
1085 
1086         switch (cap->cap) {
1087         case KVM_CAP_PPC_OSI:
1088                 r = 0;
1089                 vcpu->arch.osi_enabled = true;
1090                 break;
1091         case KVM_CAP_PPC_PAPR:
1092                 r = 0;
1093                 vcpu->arch.papr_enabled = true;
1094                 break;
1095         case KVM_CAP_PPC_EPR:
1096                 r = 0;
1097                 if (cap->args[0])
1098                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1099                 else
1100                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1101                 break;
1102 #ifdef CONFIG_BOOKE
1103         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1104                 r = 0;
1105                 vcpu->arch.watchdog_enabled = true;
1106                 break;
1107 #endif
1108 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1109         case KVM_CAP_SW_TLB: {
1110                 struct kvm_config_tlb cfg;
1111                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1112 
1113                 r = -EFAULT;
1114                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1115                         break;
1116 
1117                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1118                 break;
1119         }
1120 #endif
1121 #ifdef CONFIG_KVM_MPIC
1122         case KVM_CAP_IRQ_MPIC: {
1123                 struct fd f;
1124                 struct kvm_device *dev;
1125 
1126                 r = -EBADF;
1127                 f = fdget(cap->args[0]);
1128                 if (!f.file)
1129                         break;
1130 
1131                 r = -EPERM;
1132                 dev = kvm_device_from_filp(f.file);
1133                 if (dev)
1134                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1135 
1136                 fdput(f);
1137                 break;
1138         }
1139 #endif
1140 #ifdef CONFIG_KVM_XICS
1141         case KVM_CAP_IRQ_XICS: {
1142                 struct fd f;
1143                 struct kvm_device *dev;
1144 
1145                 r = -EBADF;
1146                 f = fdget(cap->args[0]);
1147                 if (!f.file)
1148                         break;
1149 
1150                 r = -EPERM;
1151                 dev = kvm_device_from_filp(f.file);
1152                 if (dev)
1153                         r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1154 
1155                 fdput(f);
1156                 break;
1157         }
1158 #endif /* CONFIG_KVM_XICS */
1159         default:
1160                 r = -EINVAL;
1161                 break;
1162         }
1163 
1164         if (!r)
1165                 r = kvmppc_sanity_check(vcpu);
1166 
1167         return r;
1168 }
1169 
1170 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1171                                     struct kvm_mp_state *mp_state)
1172 {
1173         return -EINVAL;
1174 }
1175 
1176 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1177                                     struct kvm_mp_state *mp_state)
1178 {
1179         return -EINVAL;
1180 }
1181 
1182 long kvm_arch_vcpu_ioctl(struct file *filp,
1183                          unsigned int ioctl, unsigned long arg)
1184 {
1185         struct kvm_vcpu *vcpu = filp->private_data;
1186         void __user *argp = (void __user *)arg;
1187         long r;
1188 
1189         switch (ioctl) {
1190         case KVM_INTERRUPT: {
1191                 struct kvm_interrupt irq;
1192                 r = -EFAULT;
1193                 if (copy_from_user(&irq, argp, sizeof(irq)))
1194                         goto out;
1195                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1196                 goto out;
1197         }
1198 
1199         case KVM_ENABLE_CAP:
1200         {
1201                 struct kvm_enable_cap cap;
1202                 r = -EFAULT;
1203                 if (copy_from_user(&cap, argp, sizeof(cap)))
1204                         goto out;
1205                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1206                 break;
1207         }
1208 
1209         case KVM_SET_ONE_REG:
1210         case KVM_GET_ONE_REG:
1211         {
1212                 struct kvm_one_reg reg;
1213                 r = -EFAULT;
1214                 if (copy_from_user(&reg, argp, sizeof(reg)))
1215                         goto out;
1216                 if (ioctl == KVM_SET_ONE_REG)
1217                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1218                 else
1219                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1220                 break;
1221         }
1222 
1223 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1224         case KVM_DIRTY_TLB: {
1225                 struct kvm_dirty_tlb dirty;
1226                 r = -EFAULT;
1227                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1228                         goto out;
1229                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1230                 break;
1231         }
1232 #endif
1233         default:
1234                 r = -EINVAL;
1235         }
1236 
1237 out:
1238         return r;
1239 }
1240 
1241 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1242 {
1243         return VM_FAULT_SIGBUS;
1244 }
1245 
1246 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1247 {
1248         u32 inst_nop = 0x60000000;
1249 #ifdef CONFIG_KVM_BOOKE_HV
1250         u32 inst_sc1 = 0x44000022;
1251         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1252         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1253         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1254         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1255 #else
1256         u32 inst_lis = 0x3c000000;
1257         u32 inst_ori = 0x60000000;
1258         u32 inst_sc = 0x44000002;
1259         u32 inst_imm_mask = 0xffff;
1260 
1261         /*
1262          * The hypercall to get into KVM from within guest context is as
1263          * follows:
1264          *
1265          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1266          *    ori r0, KVM_SC_MAGIC_R0@l
1267          *    sc
1268          *    nop
1269          */
1270         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1271         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1272         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1273         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1274 #endif
1275 
1276         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1277 
1278         return 0;
1279 }
1280 
1281 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1282                           bool line_status)
1283 {
1284         if (!irqchip_in_kernel(kvm))
1285                 return -ENXIO;
1286 
1287         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1288                                         irq_event->irq, irq_event->level,
1289                                         line_status);
1290         return 0;
1291 }
1292 
1293 
1294 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1295                                    struct kvm_enable_cap *cap)
1296 {
1297         int r;
1298 
1299         if (cap->flags)
1300                 return -EINVAL;
1301 
1302         switch (cap->cap) {
1303 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1304         case KVM_CAP_PPC_ENABLE_HCALL: {
1305                 unsigned long hcall = cap->args[0];
1306 
1307                 r = -EINVAL;
1308                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1309                     cap->args[1] > 1)
1310                         break;
1311                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1312                         break;
1313                 if (cap->args[1])
1314                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1315                 else
1316                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1317                 r = 0;
1318                 break;
1319         }
1320 #endif
1321         default:
1322                 r = -EINVAL;
1323                 break;
1324         }
1325 
1326         return r;
1327 }
1328 
1329 long kvm_arch_vm_ioctl(struct file *filp,
1330                        unsigned int ioctl, unsigned long arg)
1331 {
1332         struct kvm *kvm __maybe_unused = filp->private_data;
1333         void __user *argp = (void __user *)arg;
1334         long r;
1335 
1336         switch (ioctl) {
1337         case KVM_PPC_GET_PVINFO: {
1338                 struct kvm_ppc_pvinfo pvinfo;
1339                 memset(&pvinfo, 0, sizeof(pvinfo));
1340                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1341                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1342                         r = -EFAULT;
1343                         goto out;
1344                 }
1345 
1346                 break;
1347         }
1348         case KVM_ENABLE_CAP:
1349         {
1350                 struct kvm_enable_cap cap;
1351                 r = -EFAULT;
1352                 if (copy_from_user(&cap, argp, sizeof(cap)))
1353                         goto out;
1354                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1355                 break;
1356         }
1357 #ifdef CONFIG_PPC_BOOK3S_64
1358         case KVM_CREATE_SPAPR_TCE_64: {
1359                 struct kvm_create_spapr_tce_64 create_tce_64;
1360 
1361                 r = -EFAULT;
1362                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
1363                         goto out;
1364                 if (create_tce_64.flags) {
1365                         r = -EINVAL;
1366                         goto out;
1367                 }
1368                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1369                 goto out;
1370         }
1371         case KVM_CREATE_SPAPR_TCE: {
1372                 struct kvm_create_spapr_tce create_tce;
1373                 struct kvm_create_spapr_tce_64 create_tce_64;
1374 
1375                 r = -EFAULT;
1376                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1377                         goto out;
1378 
1379                 create_tce_64.liobn = create_tce.liobn;
1380                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
1381                 create_tce_64.offset = 0;
1382                 create_tce_64.size = create_tce.window_size >>
1383                                 IOMMU_PAGE_SHIFT_4K;
1384                 create_tce_64.flags = 0;
1385                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1386                 goto out;
1387         }
1388         case KVM_PPC_GET_SMMU_INFO: {
1389                 struct kvm_ppc_smmu_info info;
1390                 struct kvm *kvm = filp->private_data;
1391 
1392                 memset(&info, 0, sizeof(info));
1393                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1394                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1395                         r = -EFAULT;
1396                 break;
1397         }
1398         case KVM_PPC_RTAS_DEFINE_TOKEN: {
1399                 struct kvm *kvm = filp->private_data;
1400 
1401                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1402                 break;
1403         }
1404         default: {
1405                 struct kvm *kvm = filp->private_data;
1406                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1407         }
1408 #else /* CONFIG_PPC_BOOK3S_64 */
1409         default:
1410                 r = -ENOTTY;
1411 #endif
1412         }
1413 out:
1414         return r;
1415 }
1416 
1417 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1418 static unsigned long nr_lpids;
1419 
1420 long kvmppc_alloc_lpid(void)
1421 {
1422         long lpid;
1423 
1424         do {
1425                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1426                 if (lpid >= nr_lpids) {
1427                         pr_err("%s: No LPIDs free\n", __func__);
1428                         return -ENOMEM;
1429                 }
1430         } while (test_and_set_bit(lpid, lpid_inuse));
1431 
1432         return lpid;
1433 }
1434 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1435 
1436 void kvmppc_claim_lpid(long lpid)
1437 {
1438         set_bit(lpid, lpid_inuse);
1439 }
1440 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1441 
1442 void kvmppc_free_lpid(long lpid)
1443 {
1444         clear_bit(lpid, lpid_inuse);
1445 }
1446 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1447 
1448 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1449 {
1450         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1451         memset(lpid_inuse, 0, sizeof(lpid_inuse));
1452 }
1453 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1454 
1455 int kvm_arch_init(void *opaque)
1456 {
1457         return 0;
1458 }
1459 
1460 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);
1461 

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