~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

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

Version: ~ [ linux-5.12-rc1 ] ~ [ linux-5.11.2 ] ~ [ linux-5.10.19 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.101 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.177 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.222 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.258 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.258 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ 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/sched/signal.h>
 27 #include <linux/fs.h>
 28 #include <linux/slab.h>
 29 #include <linux/file.h>
 30 #include <linux/module.h>
 31 #include <linux/irqbypass.h>
 32 #include <linux/kvm_irqfd.h>
 33 #include <asm/cputable.h>
 34 #include <linux/uaccess.h>
 35 #include <asm/kvm_ppc.h>
 36 #include <asm/cputhreads.h>
 37 #include <asm/irqflags.h>
 38 #include <asm/iommu.h>
 39 #include <asm/switch_to.h>
 40 #include <asm/xive.h>
 41 #ifdef CONFIG_PPC_PSERIES
 42 #include <asm/hvcall.h>
 43 #include <asm/plpar_wrappers.h>
 44 #endif
 45 
 46 #include "timing.h"
 47 #include "irq.h"
 48 #include "../mm/mmu_decl.h"
 49 
 50 #define CREATE_TRACE_POINTS
 51 #include "trace.h"
 52 
 53 struct kvmppc_ops *kvmppc_hv_ops;
 54 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
 55 struct kvmppc_ops *kvmppc_pr_ops;
 56 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
 57 
 58 
 59 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
 60 {
 61         return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
 62 }
 63 
 64 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
 65 {
 66         return false;
 67 }
 68 
 69 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
 70 {
 71         return 1;
 72 }
 73 
 74 /*
 75  * Common checks before entering the guest world.  Call with interrupts
 76  * disabled.
 77  *
 78  * returns:
 79  *
 80  * == 1 if we're ready to go into guest state
 81  * <= 0 if we need to go back to the host with return value
 82  */
 83 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
 84 {
 85         int r;
 86 
 87         WARN_ON(irqs_disabled());
 88         hard_irq_disable();
 89 
 90         while (true) {
 91                 if (need_resched()) {
 92                         local_irq_enable();
 93                         cond_resched();
 94                         hard_irq_disable();
 95                         continue;
 96                 }
 97 
 98                 if (signal_pending(current)) {
 99                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
100                         vcpu->run->exit_reason = KVM_EXIT_INTR;
101                         r = -EINTR;
102                         break;
103                 }
104 
105                 vcpu->mode = IN_GUEST_MODE;
106 
107                 /*
108                  * Reading vcpu->requests must happen after setting vcpu->mode,
109                  * so we don't miss a request because the requester sees
110                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
111                  * before next entering the guest (and thus doesn't IPI).
112                  * This also orders the write to mode from any reads
113                  * to the page tables done while the VCPU is running.
114                  * Please see the comment in kvm_flush_remote_tlbs.
115                  */
116                 smp_mb();
117 
118                 if (kvm_request_pending(vcpu)) {
119                         /* Make sure we process requests preemptable */
120                         local_irq_enable();
121                         trace_kvm_check_requests(vcpu);
122                         r = kvmppc_core_check_requests(vcpu);
123                         hard_irq_disable();
124                         if (r > 0)
125                                 continue;
126                         break;
127                 }
128 
129                 if (kvmppc_core_prepare_to_enter(vcpu)) {
130                         /* interrupts got enabled in between, so we
131                            are back at square 1 */
132                         continue;
133                 }
134 
135                 guest_enter_irqoff();
136                 return 1;
137         }
138 
139         /* return to host */
140         local_irq_enable();
141         return r;
142 }
143 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
144 
145 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
146 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
147 {
148         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
149         int i;
150 
151         shared->sprg0 = swab64(shared->sprg0);
152         shared->sprg1 = swab64(shared->sprg1);
153         shared->sprg2 = swab64(shared->sprg2);
154         shared->sprg3 = swab64(shared->sprg3);
155         shared->srr0 = swab64(shared->srr0);
156         shared->srr1 = swab64(shared->srr1);
157         shared->dar = swab64(shared->dar);
158         shared->msr = swab64(shared->msr);
159         shared->dsisr = swab32(shared->dsisr);
160         shared->int_pending = swab32(shared->int_pending);
161         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
162                 shared->sr[i] = swab32(shared->sr[i]);
163 }
164 #endif
165 
166 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
167 {
168         int nr = kvmppc_get_gpr(vcpu, 11);
169         int r;
170         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
171         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
172         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
173         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
174         unsigned long r2 = 0;
175 
176         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
177                 /* 32 bit mode */
178                 param1 &= 0xffffffff;
179                 param2 &= 0xffffffff;
180                 param3 &= 0xffffffff;
181                 param4 &= 0xffffffff;
182         }
183 
184         switch (nr) {
185         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
186         {
187 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
188                 /* Book3S can be little endian, find it out here */
189                 int shared_big_endian = true;
190                 if (vcpu->arch.intr_msr & MSR_LE)
191                         shared_big_endian = false;
192                 if (shared_big_endian != vcpu->arch.shared_big_endian)
193                         kvmppc_swab_shared(vcpu);
194                 vcpu->arch.shared_big_endian = shared_big_endian;
195 #endif
196 
197                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
198                         /*
199                          * Older versions of the Linux magic page code had
200                          * a bug where they would map their trampoline code
201                          * NX. If that's the case, remove !PR NX capability.
202                          */
203                         vcpu->arch.disable_kernel_nx = true;
204                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
205                 }
206 
207                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
208                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
209 
210 #ifdef CONFIG_PPC_64K_PAGES
211                 /*
212                  * Make sure our 4k magic page is in the same window of a 64k
213                  * page within the guest and within the host's page.
214                  */
215                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
216                     ((ulong)vcpu->arch.shared & 0xf000)) {
217                         void *old_shared = vcpu->arch.shared;
218                         ulong shared = (ulong)vcpu->arch.shared;
219                         void *new_shared;
220 
221                         shared &= PAGE_MASK;
222                         shared |= vcpu->arch.magic_page_pa & 0xf000;
223                         new_shared = (void*)shared;
224                         memcpy(new_shared, old_shared, 0x1000);
225                         vcpu->arch.shared = new_shared;
226                 }
227 #endif
228 
229                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
230 
231                 r = EV_SUCCESS;
232                 break;
233         }
234         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
235                 r = EV_SUCCESS;
236 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
237                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
238 #endif
239 
240                 /* Second return value is in r4 */
241                 break;
242         case EV_HCALL_TOKEN(EV_IDLE):
243                 r = EV_SUCCESS;
244                 kvm_vcpu_block(vcpu);
245                 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
246                 break;
247         default:
248                 r = EV_UNIMPLEMENTED;
249                 break;
250         }
251 
252         kvmppc_set_gpr(vcpu, 4, r2);
253 
254         return r;
255 }
256 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
257 
258 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
259 {
260         int r = false;
261 
262         /* We have to know what CPU to virtualize */
263         if (!vcpu->arch.pvr)
264                 goto out;
265 
266         /* PAPR only works with book3s_64 */
267         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
268                 goto out;
269 
270         /* HV KVM can only do PAPR mode for now */
271         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
272                 goto out;
273 
274 #ifdef CONFIG_KVM_BOOKE_HV
275         if (!cpu_has_feature(CPU_FTR_EMB_HV))
276                 goto out;
277 #endif
278 
279         r = true;
280 
281 out:
282         vcpu->arch.sane = r;
283         return r ? 0 : -EINVAL;
284 }
285 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
286 
287 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
288 {
289         enum emulation_result er;
290         int r;
291 
292         er = kvmppc_emulate_loadstore(vcpu);
293         switch (er) {
294         case EMULATE_DONE:
295                 /* Future optimization: only reload non-volatiles if they were
296                  * actually modified. */
297                 r = RESUME_GUEST_NV;
298                 break;
299         case EMULATE_AGAIN:
300                 r = RESUME_GUEST;
301                 break;
302         case EMULATE_DO_MMIO:
303                 run->exit_reason = KVM_EXIT_MMIO;
304                 /* We must reload nonvolatiles because "update" load/store
305                  * instructions modify register state. */
306                 /* Future optimization: only reload non-volatiles if they were
307                  * actually modified. */
308                 r = RESUME_HOST_NV;
309                 break;
310         case EMULATE_FAIL:
311         {
312                 u32 last_inst;
313 
314                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
315                 /* XXX Deliver Program interrupt to guest. */
316                 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
317                 r = RESUME_HOST;
318                 break;
319         }
320         default:
321                 WARN_ON(1);
322                 r = RESUME_GUEST;
323         }
324 
325         return r;
326 }
327 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
328 
329 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
330               bool data)
331 {
332         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
333         struct kvmppc_pte pte;
334         int r;
335 
336         vcpu->stat.st++;
337 
338         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
339                          XLATE_WRITE, &pte);
340         if (r < 0)
341                 return r;
342 
343         *eaddr = pte.raddr;
344 
345         if (!pte.may_write)
346                 return -EPERM;
347 
348         /* Magic page override */
349         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
350             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
351             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
352                 void *magic = vcpu->arch.shared;
353                 magic += pte.eaddr & 0xfff;
354                 memcpy(magic, ptr, size);
355                 return EMULATE_DONE;
356         }
357 
358         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
359                 return EMULATE_DO_MMIO;
360 
361         return EMULATE_DONE;
362 }
363 EXPORT_SYMBOL_GPL(kvmppc_st);
364 
365 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
366                       bool data)
367 {
368         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
369         struct kvmppc_pte pte;
370         int rc;
371 
372         vcpu->stat.ld++;
373 
374         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
375                           XLATE_READ, &pte);
376         if (rc)
377                 return rc;
378 
379         *eaddr = pte.raddr;
380 
381         if (!pte.may_read)
382                 return -EPERM;
383 
384         if (!data && !pte.may_execute)
385                 return -ENOEXEC;
386 
387         /* Magic page override */
388         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
389             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
390             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
391                 void *magic = vcpu->arch.shared;
392                 magic += pte.eaddr & 0xfff;
393                 memcpy(ptr, magic, size);
394                 return EMULATE_DONE;
395         }
396 
397         if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
398                 return EMULATE_DO_MMIO;
399 
400         return EMULATE_DONE;
401 }
402 EXPORT_SYMBOL_GPL(kvmppc_ld);
403 
404 int kvm_arch_hardware_enable(void)
405 {
406         return 0;
407 }
408 
409 int kvm_arch_hardware_setup(void)
410 {
411         return 0;
412 }
413 
414 void kvm_arch_check_processor_compat(void *rtn)
415 {
416         *(int *)rtn = kvmppc_core_check_processor_compat();
417 }
418 
419 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
420 {
421         struct kvmppc_ops *kvm_ops = NULL;
422         /*
423          * if we have both HV and PR enabled, default is HV
424          */
425         if (type == 0) {
426                 if (kvmppc_hv_ops)
427                         kvm_ops = kvmppc_hv_ops;
428                 else
429                         kvm_ops = kvmppc_pr_ops;
430                 if (!kvm_ops)
431                         goto err_out;
432         } else  if (type == KVM_VM_PPC_HV) {
433                 if (!kvmppc_hv_ops)
434                         goto err_out;
435                 kvm_ops = kvmppc_hv_ops;
436         } else if (type == KVM_VM_PPC_PR) {
437                 if (!kvmppc_pr_ops)
438                         goto err_out;
439                 kvm_ops = kvmppc_pr_ops;
440         } else
441                 goto err_out;
442 
443         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
444                 return -ENOENT;
445 
446         kvm->arch.kvm_ops = kvm_ops;
447         return kvmppc_core_init_vm(kvm);
448 err_out:
449         return -EINVAL;
450 }
451 
452 bool kvm_arch_has_vcpu_debugfs(void)
453 {
454         return false;
455 }
456 
457 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
458 {
459         return 0;
460 }
461 
462 void kvm_arch_destroy_vm(struct kvm *kvm)
463 {
464         unsigned int i;
465         struct kvm_vcpu *vcpu;
466 
467 #ifdef CONFIG_KVM_XICS
468         /*
469          * We call kick_all_cpus_sync() to ensure that all
470          * CPUs have executed any pending IPIs before we
471          * continue and free VCPUs structures below.
472          */
473         if (is_kvmppc_hv_enabled(kvm))
474                 kick_all_cpus_sync();
475 #endif
476 
477         kvm_for_each_vcpu(i, vcpu, kvm)
478                 kvm_arch_vcpu_free(vcpu);
479 
480         mutex_lock(&kvm->lock);
481         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
482                 kvm->vcpus[i] = NULL;
483 
484         atomic_set(&kvm->online_vcpus, 0);
485 
486         kvmppc_core_destroy_vm(kvm);
487 
488         mutex_unlock(&kvm->lock);
489 
490         /* drop the module reference */
491         module_put(kvm->arch.kvm_ops->owner);
492 }
493 
494 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
495 {
496         int r;
497         /* Assume we're using HV mode when the HV module is loaded */
498         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
499 
500         if (kvm) {
501                 /*
502                  * Hooray - we know which VM type we're running on. Depend on
503                  * that rather than the guess above.
504                  */
505                 hv_enabled = is_kvmppc_hv_enabled(kvm);
506         }
507 
508         switch (ext) {
509 #ifdef CONFIG_BOOKE
510         case KVM_CAP_PPC_BOOKE_SREGS:
511         case KVM_CAP_PPC_BOOKE_WATCHDOG:
512         case KVM_CAP_PPC_EPR:
513 #else
514         case KVM_CAP_PPC_SEGSTATE:
515         case KVM_CAP_PPC_HIOR:
516         case KVM_CAP_PPC_PAPR:
517 #endif
518         case KVM_CAP_PPC_UNSET_IRQ:
519         case KVM_CAP_PPC_IRQ_LEVEL:
520         case KVM_CAP_ENABLE_CAP:
521         case KVM_CAP_ENABLE_CAP_VM:
522         case KVM_CAP_ONE_REG:
523         case KVM_CAP_IOEVENTFD:
524         case KVM_CAP_DEVICE_CTRL:
525         case KVM_CAP_IMMEDIATE_EXIT:
526                 r = 1;
527                 break;
528         case KVM_CAP_PPC_PAIRED_SINGLES:
529         case KVM_CAP_PPC_OSI:
530         case KVM_CAP_PPC_GET_PVINFO:
531 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
532         case KVM_CAP_SW_TLB:
533 #endif
534                 /* We support this only for PR */
535                 r = !hv_enabled;
536                 break;
537 #ifdef CONFIG_KVM_MPIC
538         case KVM_CAP_IRQ_MPIC:
539                 r = 1;
540                 break;
541 #endif
542 
543 #ifdef CONFIG_PPC_BOOK3S_64
544         case KVM_CAP_SPAPR_TCE:
545         case KVM_CAP_SPAPR_TCE_64:
546                 r = 1;
547                 break;
548         case KVM_CAP_SPAPR_TCE_VFIO:
549                 r = !!cpu_has_feature(CPU_FTR_HVMODE);
550                 break;
551         case KVM_CAP_PPC_RTAS:
552         case KVM_CAP_PPC_FIXUP_HCALL:
553         case KVM_CAP_PPC_ENABLE_HCALL:
554 #ifdef CONFIG_KVM_XICS
555         case KVM_CAP_IRQ_XICS:
556 #endif
557         case KVM_CAP_PPC_GET_CPU_CHAR:
558                 r = 1;
559                 break;
560 
561         case KVM_CAP_PPC_ALLOC_HTAB:
562                 r = hv_enabled;
563                 break;
564 #endif /* CONFIG_PPC_BOOK3S_64 */
565 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
566         case KVM_CAP_PPC_SMT:
567                 r = 0;
568                 if (kvm) {
569                         if (kvm->arch.emul_smt_mode > 1)
570                                 r = kvm->arch.emul_smt_mode;
571                         else
572                                 r = kvm->arch.smt_mode;
573                 } else if (hv_enabled) {
574                         if (cpu_has_feature(CPU_FTR_ARCH_300))
575                                 r = 1;
576                         else
577                                 r = threads_per_subcore;
578                 }
579                 break;
580         case KVM_CAP_PPC_SMT_POSSIBLE:
581                 r = 1;
582                 if (hv_enabled) {
583                         if (!cpu_has_feature(CPU_FTR_ARCH_300))
584                                 r = ((threads_per_subcore << 1) - 1);
585                         else
586                                 /* P9 can emulate dbells, so allow any mode */
587                                 r = 8 | 4 | 2 | 1;
588                 }
589                 break;
590         case KVM_CAP_PPC_RMA:
591                 r = 0;
592                 break;
593         case KVM_CAP_PPC_HWRNG:
594                 r = kvmppc_hwrng_present();
595                 break;
596         case KVM_CAP_PPC_MMU_RADIX:
597                 r = !!(hv_enabled && radix_enabled());
598                 break;
599         case KVM_CAP_PPC_MMU_HASH_V3:
600                 r = !!(hv_enabled && cpu_has_feature(CPU_FTR_ARCH_300) &&
601                        cpu_has_feature(CPU_FTR_HVMODE));
602                 break;
603         case KVM_CAP_PPC_NESTED_HV:
604                 r = !!(hv_enabled && kvmppc_hv_ops->enable_nested &&
605                        !kvmppc_hv_ops->enable_nested(NULL));
606                 break;
607 #endif
608         case KVM_CAP_SYNC_MMU:
609 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
610                 r = hv_enabled;
611 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
612                 r = 1;
613 #else
614                 r = 0;
615 #endif
616                 break;
617 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
618         case KVM_CAP_PPC_HTAB_FD:
619                 r = hv_enabled;
620                 break;
621 #endif
622         case KVM_CAP_NR_VCPUS:
623                 /*
624                  * Recommending a number of CPUs is somewhat arbitrary; we
625                  * return the number of present CPUs for -HV (since a host
626                  * will have secondary threads "offline"), and for other KVM
627                  * implementations just count online CPUs.
628                  */
629                 if (hv_enabled)
630                         r = num_present_cpus();
631                 else
632                         r = num_online_cpus();
633                 break;
634         case KVM_CAP_NR_MEMSLOTS:
635                 r = KVM_USER_MEM_SLOTS;
636                 break;
637         case KVM_CAP_MAX_VCPUS:
638                 r = KVM_MAX_VCPUS;
639                 break;
640 #ifdef CONFIG_PPC_BOOK3S_64
641         case KVM_CAP_PPC_GET_SMMU_INFO:
642                 r = 1;
643                 break;
644         case KVM_CAP_SPAPR_MULTITCE:
645                 r = 1;
646                 break;
647         case KVM_CAP_SPAPR_RESIZE_HPT:
648                 r = !!hv_enabled;
649                 break;
650 #endif
651 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
652         case KVM_CAP_PPC_FWNMI:
653                 r = hv_enabled;
654                 break;
655 #endif
656 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
657         case KVM_CAP_PPC_HTM:
658                 r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
659                      (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
660                 break;
661 #endif
662         default:
663                 r = 0;
664                 break;
665         }
666         return r;
667 
668 }
669 
670 long kvm_arch_dev_ioctl(struct file *filp,
671                         unsigned int ioctl, unsigned long arg)
672 {
673         return -EINVAL;
674 }
675 
676 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
677                            struct kvm_memory_slot *dont)
678 {
679         kvmppc_core_free_memslot(kvm, free, dont);
680 }
681 
682 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
683                             unsigned long npages)
684 {
685         return kvmppc_core_create_memslot(kvm, slot, npages);
686 }
687 
688 int kvm_arch_prepare_memory_region(struct kvm *kvm,
689                                    struct kvm_memory_slot *memslot,
690                                    const struct kvm_userspace_memory_region *mem,
691                                    enum kvm_mr_change change)
692 {
693         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
694 }
695 
696 void kvm_arch_commit_memory_region(struct kvm *kvm,
697                                    const struct kvm_userspace_memory_region *mem,
698                                    const struct kvm_memory_slot *old,
699                                    const struct kvm_memory_slot *new,
700                                    enum kvm_mr_change change)
701 {
702         kvmppc_core_commit_memory_region(kvm, mem, old, new);
703 }
704 
705 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
706                                    struct kvm_memory_slot *slot)
707 {
708         kvmppc_core_flush_memslot(kvm, slot);
709 }
710 
711 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
712 {
713         struct kvm_vcpu *vcpu;
714         vcpu = kvmppc_core_vcpu_create(kvm, id);
715         if (!IS_ERR(vcpu)) {
716                 vcpu->arch.wqp = &vcpu->wq;
717                 kvmppc_create_vcpu_debugfs(vcpu, id);
718         }
719         return vcpu;
720 }
721 
722 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
723 {
724 }
725 
726 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
727 {
728         /* Make sure we're not using the vcpu anymore */
729         hrtimer_cancel(&vcpu->arch.dec_timer);
730 
731         kvmppc_remove_vcpu_debugfs(vcpu);
732 
733         switch (vcpu->arch.irq_type) {
734         case KVMPPC_IRQ_MPIC:
735                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
736                 break;
737         case KVMPPC_IRQ_XICS:
738                 if (xive_enabled())
739                         kvmppc_xive_cleanup_vcpu(vcpu);
740                 else
741                         kvmppc_xics_free_icp(vcpu);
742                 break;
743         }
744 
745         kvmppc_core_vcpu_free(vcpu);
746 }
747 
748 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
749 {
750         kvm_arch_vcpu_free(vcpu);
751 }
752 
753 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
754 {
755         return kvmppc_core_pending_dec(vcpu);
756 }
757 
758 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
759 {
760         struct kvm_vcpu *vcpu;
761 
762         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
763         kvmppc_decrementer_func(vcpu);
764 
765         return HRTIMER_NORESTART;
766 }
767 
768 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
769 {
770         int ret;
771 
772         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
773         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
774         vcpu->arch.dec_expires = get_tb();
775 
776 #ifdef CONFIG_KVM_EXIT_TIMING
777         mutex_init(&vcpu->arch.exit_timing_lock);
778 #endif
779         ret = kvmppc_subarch_vcpu_init(vcpu);
780         return ret;
781 }
782 
783 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
784 {
785         kvmppc_mmu_destroy(vcpu);
786         kvmppc_subarch_vcpu_uninit(vcpu);
787 }
788 
789 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
790 {
791 #ifdef CONFIG_BOOKE
792         /*
793          * vrsave (formerly usprg0) isn't used by Linux, but may
794          * be used by the guest.
795          *
796          * On non-booke this is associated with Altivec and
797          * is handled by code in book3s.c.
798          */
799         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
800 #endif
801         kvmppc_core_vcpu_load(vcpu, cpu);
802 }
803 
804 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
805 {
806         kvmppc_core_vcpu_put(vcpu);
807 #ifdef CONFIG_BOOKE
808         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
809 #endif
810 }
811 
812 /*
813  * irq_bypass_add_producer and irq_bypass_del_producer are only
814  * useful if the architecture supports PCI passthrough.
815  * irq_bypass_stop and irq_bypass_start are not needed and so
816  * kvm_ops are not defined for them.
817  */
818 bool kvm_arch_has_irq_bypass(void)
819 {
820         return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
821                 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
822 }
823 
824 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
825                                      struct irq_bypass_producer *prod)
826 {
827         struct kvm_kernel_irqfd *irqfd =
828                 container_of(cons, struct kvm_kernel_irqfd, consumer);
829         struct kvm *kvm = irqfd->kvm;
830 
831         if (kvm->arch.kvm_ops->irq_bypass_add_producer)
832                 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
833 
834         return 0;
835 }
836 
837 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
838                                       struct irq_bypass_producer *prod)
839 {
840         struct kvm_kernel_irqfd *irqfd =
841                 container_of(cons, struct kvm_kernel_irqfd, consumer);
842         struct kvm *kvm = irqfd->kvm;
843 
844         if (kvm->arch.kvm_ops->irq_bypass_del_producer)
845                 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
846 }
847 
848 #ifdef CONFIG_VSX
849 static inline int kvmppc_get_vsr_dword_offset(int index)
850 {
851         int offset;
852 
853         if ((index != 0) && (index != 1))
854                 return -1;
855 
856 #ifdef __BIG_ENDIAN
857         offset =  index;
858 #else
859         offset = 1 - index;
860 #endif
861 
862         return offset;
863 }
864 
865 static inline int kvmppc_get_vsr_word_offset(int index)
866 {
867         int offset;
868 
869         if ((index > 3) || (index < 0))
870                 return -1;
871 
872 #ifdef __BIG_ENDIAN
873         offset = index;
874 #else
875         offset = 3 - index;
876 #endif
877         return offset;
878 }
879 
880 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
881         u64 gpr)
882 {
883         union kvmppc_one_reg val;
884         int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
885         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
886 
887         if (offset == -1)
888                 return;
889 
890         if (index >= 32) {
891                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
892                 val.vsxval[offset] = gpr;
893                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
894         } else {
895                 VCPU_VSX_FPR(vcpu, index, offset) = gpr;
896         }
897 }
898 
899 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
900         u64 gpr)
901 {
902         union kvmppc_one_reg val;
903         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
904 
905         if (index >= 32) {
906                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
907                 val.vsxval[0] = gpr;
908                 val.vsxval[1] = gpr;
909                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
910         } else {
911                 VCPU_VSX_FPR(vcpu, index, 0) = gpr;
912                 VCPU_VSX_FPR(vcpu, index, 1) = gpr;
913         }
914 }
915 
916 static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
917         u32 gpr)
918 {
919         union kvmppc_one_reg val;
920         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
921 
922         if (index >= 32) {
923                 val.vsx32val[0] = gpr;
924                 val.vsx32val[1] = gpr;
925                 val.vsx32val[2] = gpr;
926                 val.vsx32val[3] = gpr;
927                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
928         } else {
929                 val.vsx32val[0] = gpr;
930                 val.vsx32val[1] = gpr;
931                 VCPU_VSX_FPR(vcpu, index, 0) = val.vsxval[0];
932                 VCPU_VSX_FPR(vcpu, index, 1) = val.vsxval[0];
933         }
934 }
935 
936 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
937         u32 gpr32)
938 {
939         union kvmppc_one_reg val;
940         int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
941         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
942         int dword_offset, word_offset;
943 
944         if (offset == -1)
945                 return;
946 
947         if (index >= 32) {
948                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
949                 val.vsx32val[offset] = gpr32;
950                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
951         } else {
952                 dword_offset = offset / 2;
953                 word_offset = offset % 2;
954                 val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
955                 val.vsx32val[word_offset] = gpr32;
956                 VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
957         }
958 }
959 #endif /* CONFIG_VSX */
960 
961 #ifdef CONFIG_ALTIVEC
962 static inline int kvmppc_get_vmx_offset_generic(struct kvm_vcpu *vcpu,
963                 int index, int element_size)
964 {
965         int offset;
966         int elts = sizeof(vector128)/element_size;
967 
968         if ((index < 0) || (index >= elts))
969                 return -1;
970 
971         if (kvmppc_need_byteswap(vcpu))
972                 offset = elts - index - 1;
973         else
974                 offset = index;
975 
976         return offset;
977 }
978 
979 static inline int kvmppc_get_vmx_dword_offset(struct kvm_vcpu *vcpu,
980                 int index)
981 {
982         return kvmppc_get_vmx_offset_generic(vcpu, index, 8);
983 }
984 
985 static inline int kvmppc_get_vmx_word_offset(struct kvm_vcpu *vcpu,
986                 int index)
987 {
988         return kvmppc_get_vmx_offset_generic(vcpu, index, 4);
989 }
990 
991 static inline int kvmppc_get_vmx_hword_offset(struct kvm_vcpu *vcpu,
992                 int index)
993 {
994         return kvmppc_get_vmx_offset_generic(vcpu, index, 2);
995 }
996 
997 static inline int kvmppc_get_vmx_byte_offset(struct kvm_vcpu *vcpu,
998                 int index)
999 {
1000         return kvmppc_get_vmx_offset_generic(vcpu, index, 1);
1001 }
1002 
1003 
1004 static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
1005         u64 gpr)
1006 {
1007         union kvmppc_one_reg val;
1008         int offset = kvmppc_get_vmx_dword_offset(vcpu,
1009                         vcpu->arch.mmio_vmx_offset);
1010         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1011 
1012         if (offset == -1)
1013                 return;
1014 
1015         val.vval = VCPU_VSX_VR(vcpu, index);
1016         val.vsxval[offset] = gpr;
1017         VCPU_VSX_VR(vcpu, index) = val.vval;
1018 }
1019 
1020 static inline void kvmppc_set_vmx_word(struct kvm_vcpu *vcpu,
1021         u32 gpr32)
1022 {
1023         union kvmppc_one_reg val;
1024         int offset = kvmppc_get_vmx_word_offset(vcpu,
1025                         vcpu->arch.mmio_vmx_offset);
1026         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1027 
1028         if (offset == -1)
1029                 return;
1030 
1031         val.vval = VCPU_VSX_VR(vcpu, index);
1032         val.vsx32val[offset] = gpr32;
1033         VCPU_VSX_VR(vcpu, index) = val.vval;
1034 }
1035 
1036 static inline void kvmppc_set_vmx_hword(struct kvm_vcpu *vcpu,
1037         u16 gpr16)
1038 {
1039         union kvmppc_one_reg val;
1040         int offset = kvmppc_get_vmx_hword_offset(vcpu,
1041                         vcpu->arch.mmio_vmx_offset);
1042         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1043 
1044         if (offset == -1)
1045                 return;
1046 
1047         val.vval = VCPU_VSX_VR(vcpu, index);
1048         val.vsx16val[offset] = gpr16;
1049         VCPU_VSX_VR(vcpu, index) = val.vval;
1050 }
1051 
1052 static inline void kvmppc_set_vmx_byte(struct kvm_vcpu *vcpu,
1053         u8 gpr8)
1054 {
1055         union kvmppc_one_reg val;
1056         int offset = kvmppc_get_vmx_byte_offset(vcpu,
1057                         vcpu->arch.mmio_vmx_offset);
1058         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1059 
1060         if (offset == -1)
1061                 return;
1062 
1063         val.vval = VCPU_VSX_VR(vcpu, index);
1064         val.vsx8val[offset] = gpr8;
1065         VCPU_VSX_VR(vcpu, index) = val.vval;
1066 }
1067 #endif /* CONFIG_ALTIVEC */
1068 
1069 #ifdef CONFIG_PPC_FPU
1070 static inline u64 sp_to_dp(u32 fprs)
1071 {
1072         u64 fprd;
1073 
1074         preempt_disable();
1075         enable_kernel_fp();
1076         asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m" (fprd) : "m" (fprs)
1077              : "fr0");
1078         preempt_enable();
1079         return fprd;
1080 }
1081 
1082 static inline u32 dp_to_sp(u64 fprd)
1083 {
1084         u32 fprs;
1085 
1086         preempt_disable();
1087         enable_kernel_fp();
1088         asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m" (fprs) : "m" (fprd)
1089              : "fr0");
1090         preempt_enable();
1091         return fprs;
1092 }
1093 
1094 #else
1095 #define sp_to_dp(x)     (x)
1096 #define dp_to_sp(x)     (x)
1097 #endif /* CONFIG_PPC_FPU */
1098 
1099 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
1100                                       struct kvm_run *run)
1101 {
1102         u64 uninitialized_var(gpr);
1103 
1104         if (run->mmio.len > sizeof(gpr)) {
1105                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
1106                 return;
1107         }
1108 
1109         if (!vcpu->arch.mmio_host_swabbed) {
1110                 switch (run->mmio.len) {
1111                 case 8: gpr = *(u64 *)run->mmio.data; break;
1112                 case 4: gpr = *(u32 *)run->mmio.data; break;
1113                 case 2: gpr = *(u16 *)run->mmio.data; break;
1114                 case 1: gpr = *(u8 *)run->mmio.data; break;
1115                 }
1116         } else {
1117                 switch (run->mmio.len) {
1118                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
1119                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
1120                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
1121                 case 1: gpr = *(u8 *)run->mmio.data; break;
1122                 }
1123         }
1124 
1125         /* conversion between single and double precision */
1126         if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
1127                 gpr = sp_to_dp(gpr);
1128 
1129         if (vcpu->arch.mmio_sign_extend) {
1130                 switch (run->mmio.len) {
1131 #ifdef CONFIG_PPC64
1132                 case 4:
1133                         gpr = (s64)(s32)gpr;
1134                         break;
1135 #endif
1136                 case 2:
1137                         gpr = (s64)(s16)gpr;
1138                         break;
1139                 case 1:
1140                         gpr = (s64)(s8)gpr;
1141                         break;
1142                 }
1143         }
1144 
1145         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1146         case KVM_MMIO_REG_GPR:
1147                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1148                 break;
1149         case KVM_MMIO_REG_FPR:
1150                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1151                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);
1152 
1153                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1154                 break;
1155 #ifdef CONFIG_PPC_BOOK3S
1156         case KVM_MMIO_REG_QPR:
1157                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1158                 break;
1159         case KVM_MMIO_REG_FQPR:
1160                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1161                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1162                 break;
1163 #endif
1164 #ifdef CONFIG_VSX
1165         case KVM_MMIO_REG_VSX:
1166                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1167                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);
1168 
1169                 if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
1170                         kvmppc_set_vsr_dword(vcpu, gpr);
1171                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
1172                         kvmppc_set_vsr_word(vcpu, gpr);
1173                 else if (vcpu->arch.mmio_copy_type ==
1174                                 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1175                         kvmppc_set_vsr_dword_dump(vcpu, gpr);
1176                 else if (vcpu->arch.mmio_copy_type ==
1177                                 KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
1178                         kvmppc_set_vsr_word_dump(vcpu, gpr);
1179                 break;
1180 #endif
1181 #ifdef CONFIG_ALTIVEC
1182         case KVM_MMIO_REG_VMX:
1183                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1184                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);
1185 
1186                 if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_DWORD)
1187                         kvmppc_set_vmx_dword(vcpu, gpr);
1188                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_WORD)
1189                         kvmppc_set_vmx_word(vcpu, gpr);
1190                 else if (vcpu->arch.mmio_copy_type ==
1191                                 KVMPPC_VMX_COPY_HWORD)
1192                         kvmppc_set_vmx_hword(vcpu, gpr);
1193                 else if (vcpu->arch.mmio_copy_type ==
1194                                 KVMPPC_VMX_COPY_BYTE)
1195                         kvmppc_set_vmx_byte(vcpu, gpr);
1196                 break;
1197 #endif
1198         default:
1199                 BUG();
1200         }
1201 }
1202 
1203 static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1204                                 unsigned int rt, unsigned int bytes,
1205                                 int is_default_endian, int sign_extend)
1206 {
1207         int idx, ret;
1208         bool host_swabbed;
1209 
1210         /* Pity C doesn't have a logical XOR operator */
1211         if (kvmppc_need_byteswap(vcpu)) {
1212                 host_swabbed = is_default_endian;
1213         } else {
1214                 host_swabbed = !is_default_endian;
1215         }
1216 
1217         if (bytes > sizeof(run->mmio.data)) {
1218                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1219                        run->mmio.len);
1220         }
1221 
1222         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1223         run->mmio.len = bytes;
1224         run->mmio.is_write = 0;
1225 
1226         vcpu->arch.io_gpr = rt;
1227         vcpu->arch.mmio_host_swabbed = host_swabbed;
1228         vcpu->mmio_needed = 1;
1229         vcpu->mmio_is_write = 0;
1230         vcpu->arch.mmio_sign_extend = sign_extend;
1231 
1232         idx = srcu_read_lock(&vcpu->kvm->srcu);
1233 
1234         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1235                               bytes, &run->mmio.data);
1236 
1237         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1238 
1239         if (!ret) {
1240                 kvmppc_complete_mmio_load(vcpu, run);
1241                 vcpu->mmio_needed = 0;
1242                 return EMULATE_DONE;
1243         }
1244 
1245         return EMULATE_DO_MMIO;
1246 }
1247 
1248 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1249                        unsigned int rt, unsigned int bytes,
1250                        int is_default_endian)
1251 {
1252         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0);
1253 }
1254 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1255 
1256 /* Same as above, but sign extends */
1257 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
1258                         unsigned int rt, unsigned int bytes,
1259                         int is_default_endian)
1260 {
1261         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
1262 }
1263 
1264 #ifdef CONFIG_VSX
1265 int kvmppc_handle_vsx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1266                         unsigned int rt, unsigned int bytes,
1267                         int is_default_endian, int mmio_sign_extend)
1268 {
1269         enum emulation_result emulated = EMULATE_DONE;
1270 
1271         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1272         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1273                 return EMULATE_FAIL;
1274 
1275         while (vcpu->arch.mmio_vsx_copy_nums) {
1276                 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1277                         is_default_endian, mmio_sign_extend);
1278 
1279                 if (emulated != EMULATE_DONE)
1280                         break;
1281 
1282                 vcpu->arch.paddr_accessed += run->mmio.len;
1283 
1284                 vcpu->arch.mmio_vsx_copy_nums--;
1285                 vcpu->arch.mmio_vsx_offset++;
1286         }
1287         return emulated;
1288 }
1289 #endif /* CONFIG_VSX */
1290 
1291 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1292                         u64 val, unsigned int bytes, int is_default_endian)
1293 {
1294         void *data = run->mmio.data;
1295         int idx, ret;
1296         bool host_swabbed;
1297 
1298         /* Pity C doesn't have a logical XOR operator */
1299         if (kvmppc_need_byteswap(vcpu)) {
1300                 host_swabbed = is_default_endian;
1301         } else {
1302                 host_swabbed = !is_default_endian;
1303         }
1304 
1305         if (bytes > sizeof(run->mmio.data)) {
1306                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1307                        run->mmio.len);
1308         }
1309 
1310         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1311         run->mmio.len = bytes;
1312         run->mmio.is_write = 1;
1313         vcpu->mmio_needed = 1;
1314         vcpu->mmio_is_write = 1;
1315 
1316         if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1317                 val = dp_to_sp(val);
1318 
1319         /* Store the value at the lowest bytes in 'data'. */
1320         if (!host_swabbed) {
1321                 switch (bytes) {
1322                 case 8: *(u64 *)data = val; break;
1323                 case 4: *(u32 *)data = val; break;
1324                 case 2: *(u16 *)data = val; break;
1325                 case 1: *(u8  *)data = val; break;
1326                 }
1327         } else {
1328                 switch (bytes) {
1329                 case 8: *(u64 *)data = swab64(val); break;
1330                 case 4: *(u32 *)data = swab32(val); break;
1331                 case 2: *(u16 *)data = swab16(val); break;
1332                 case 1: *(u8  *)data = val; break;
1333                 }
1334         }
1335 
1336         idx = srcu_read_lock(&vcpu->kvm->srcu);
1337 
1338         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1339                                bytes, &run->mmio.data);
1340 
1341         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1342 
1343         if (!ret) {
1344                 vcpu->mmio_needed = 0;
1345                 return EMULATE_DONE;
1346         }
1347 
1348         return EMULATE_DO_MMIO;
1349 }
1350 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1351 
1352 #ifdef CONFIG_VSX
1353 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1354 {
1355         u32 dword_offset, word_offset;
1356         union kvmppc_one_reg reg;
1357         int vsx_offset = 0;
1358         int copy_type = vcpu->arch.mmio_copy_type;
1359         int result = 0;
1360 
1361         switch (copy_type) {
1362         case KVMPPC_VSX_COPY_DWORD:
1363                 vsx_offset =
1364                         kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1365 
1366                 if (vsx_offset == -1) {
1367                         result = -1;
1368                         break;
1369                 }
1370 
1371                 if (rs < 32) {
1372                         *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
1373                 } else {
1374                         reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1375                         *val = reg.vsxval[vsx_offset];
1376                 }
1377                 break;
1378 
1379         case KVMPPC_VSX_COPY_WORD:
1380                 vsx_offset =
1381                         kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1382 
1383                 if (vsx_offset == -1) {
1384                         result = -1;
1385                         break;
1386                 }
1387 
1388                 if (rs < 32) {
1389                         dword_offset = vsx_offset / 2;
1390                         word_offset = vsx_offset % 2;
1391                         reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
1392                         *val = reg.vsx32val[word_offset];
1393                 } else {
1394                         reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1395                         *val = reg.vsx32val[vsx_offset];
1396                 }
1397                 break;
1398 
1399         default:
1400                 result = -1;
1401                 break;
1402         }
1403 
1404         return result;
1405 }
1406 
1407 int kvmppc_handle_vsx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1408                         int rs, unsigned int bytes, int is_default_endian)
1409 {
1410         u64 val;
1411         enum emulation_result emulated = EMULATE_DONE;
1412 
1413         vcpu->arch.io_gpr = rs;
1414 
1415         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1416         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1417                 return EMULATE_FAIL;
1418 
1419         while (vcpu->arch.mmio_vsx_copy_nums) {
1420                 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1421                         return EMULATE_FAIL;
1422 
1423                 emulated = kvmppc_handle_store(run, vcpu,
1424                          val, bytes, is_default_endian);
1425 
1426                 if (emulated != EMULATE_DONE)
1427                         break;
1428 
1429                 vcpu->arch.paddr_accessed += run->mmio.len;
1430 
1431                 vcpu->arch.mmio_vsx_copy_nums--;
1432                 vcpu->arch.mmio_vsx_offset++;
1433         }
1434 
1435         return emulated;
1436 }
1437 
1438 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu,
1439                         struct kvm_run *run)
1440 {
1441         enum emulation_result emulated = EMULATE_FAIL;
1442         int r;
1443 
1444         vcpu->arch.paddr_accessed += run->mmio.len;
1445 
1446         if (!vcpu->mmio_is_write) {
1447                 emulated = kvmppc_handle_vsx_load(run, vcpu, vcpu->arch.io_gpr,
1448                          run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1449         } else {
1450                 emulated = kvmppc_handle_vsx_store(run, vcpu,
1451                          vcpu->arch.io_gpr, run->mmio.len, 1);
1452         }
1453 
1454         switch (emulated) {
1455         case EMULATE_DO_MMIO:
1456                 run->exit_reason = KVM_EXIT_MMIO;
1457                 r = RESUME_HOST;
1458                 break;
1459         case EMULATE_FAIL:
1460                 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1461                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1462                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1463                 r = RESUME_HOST;
1464                 break;
1465         default:
1466                 r = RESUME_GUEST;
1467                 break;
1468         }
1469         return r;
1470 }
1471 #endif /* CONFIG_VSX */
1472 
1473 #ifdef CONFIG_ALTIVEC
1474 int kvmppc_handle_vmx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1475                 unsigned int rt, unsigned int bytes, int is_default_endian)
1476 {
1477         enum emulation_result emulated = EMULATE_DONE;
1478 
1479         if (vcpu->arch.mmio_vsx_copy_nums > 2)
1480                 return EMULATE_FAIL;
1481 
1482         while (vcpu->arch.mmio_vmx_copy_nums) {
1483                 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1484                                 is_default_endian, 0);
1485 
1486                 if (emulated != EMULATE_DONE)
1487                         break;
1488 
1489                 vcpu->arch.paddr_accessed += run->mmio.len;
1490                 vcpu->arch.mmio_vmx_copy_nums--;
1491                 vcpu->arch.mmio_vmx_offset++;
1492         }
1493 
1494         return emulated;
1495 }
1496 
1497 int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
1498 {
1499         union kvmppc_one_reg reg;
1500         int vmx_offset = 0;
1501         int result = 0;
1502 
1503         vmx_offset =
1504                 kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1505 
1506         if (vmx_offset == -1)
1507                 return -1;
1508 
1509         reg.vval = VCPU_VSX_VR(vcpu, index);
1510         *val = reg.vsxval[vmx_offset];
1511 
1512         return result;
1513 }
1514 
1515 int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
1516 {
1517         union kvmppc_one_reg reg;
1518         int vmx_offset = 0;
1519         int result = 0;
1520 
1521         vmx_offset =
1522                 kvmppc_get_vmx_word_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1523 
1524         if (vmx_offset == -1)
1525                 return -1;
1526 
1527         reg.vval = VCPU_VSX_VR(vcpu, index);
1528         *val = reg.vsx32val[vmx_offset];
1529 
1530         return result;
1531 }
1532 
1533 int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
1534 {
1535         union kvmppc_one_reg reg;
1536         int vmx_offset = 0;
1537         int result = 0;
1538 
1539         vmx_offset =
1540                 kvmppc_get_vmx_hword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1541 
1542         if (vmx_offset == -1)
1543                 return -1;
1544 
1545         reg.vval = VCPU_VSX_VR(vcpu, index);
1546         *val = reg.vsx16val[vmx_offset];
1547 
1548         return result;
1549 }
1550 
1551 int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
1552 {
1553         union kvmppc_one_reg reg;
1554         int vmx_offset = 0;
1555         int result = 0;
1556 
1557         vmx_offset =
1558                 kvmppc_get_vmx_byte_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1559 
1560         if (vmx_offset == -1)
1561                 return -1;
1562 
1563         reg.vval = VCPU_VSX_VR(vcpu, index);
1564         *val = reg.vsx8val[vmx_offset];
1565 
1566         return result;
1567 }
1568 
1569 int kvmppc_handle_vmx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1570                 unsigned int rs, unsigned int bytes, int is_default_endian)
1571 {
1572         u64 val = 0;
1573         unsigned int index = rs & KVM_MMIO_REG_MASK;
1574         enum emulation_result emulated = EMULATE_DONE;
1575 
1576         if (vcpu->arch.mmio_vsx_copy_nums > 2)
1577                 return EMULATE_FAIL;
1578 
1579         vcpu->arch.io_gpr = rs;
1580 
1581         while (vcpu->arch.mmio_vmx_copy_nums) {
1582                 switch (vcpu->arch.mmio_copy_type) {
1583                 case KVMPPC_VMX_COPY_DWORD:
1584                         if (kvmppc_get_vmx_dword(vcpu, index, &val) == -1)
1585                                 return EMULATE_FAIL;
1586 
1587                         break;
1588                 case KVMPPC_VMX_COPY_WORD:
1589                         if (kvmppc_get_vmx_word(vcpu, index, &val) == -1)
1590                                 return EMULATE_FAIL;
1591                         break;
1592                 case KVMPPC_VMX_COPY_HWORD:
1593                         if (kvmppc_get_vmx_hword(vcpu, index, &val) == -1)
1594                                 return EMULATE_FAIL;
1595                         break;
1596                 case KVMPPC_VMX_COPY_BYTE:
1597                         if (kvmppc_get_vmx_byte(vcpu, index, &val) == -1)
1598                                 return EMULATE_FAIL;
1599                         break;
1600                 default:
1601                         return EMULATE_FAIL;
1602                 }
1603 
1604                 emulated = kvmppc_handle_store(run, vcpu, val, bytes,
1605                                 is_default_endian);
1606                 if (emulated != EMULATE_DONE)
1607                         break;
1608 
1609                 vcpu->arch.paddr_accessed += run->mmio.len;
1610                 vcpu->arch.mmio_vmx_copy_nums--;
1611                 vcpu->arch.mmio_vmx_offset++;
1612         }
1613 
1614         return emulated;
1615 }
1616 
1617 static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu,
1618                 struct kvm_run *run)
1619 {
1620         enum emulation_result emulated = EMULATE_FAIL;
1621         int r;
1622 
1623         vcpu->arch.paddr_accessed += run->mmio.len;
1624 
1625         if (!vcpu->mmio_is_write) {
1626                 emulated = kvmppc_handle_vmx_load(run, vcpu,
1627                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1628         } else {
1629                 emulated = kvmppc_handle_vmx_store(run, vcpu,
1630                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1631         }
1632 
1633         switch (emulated) {
1634         case EMULATE_DO_MMIO:
1635                 run->exit_reason = KVM_EXIT_MMIO;
1636                 r = RESUME_HOST;
1637                 break;
1638         case EMULATE_FAIL:
1639                 pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
1640                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1641                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1642                 r = RESUME_HOST;
1643                 break;
1644         default:
1645                 r = RESUME_GUEST;
1646                 break;
1647         }
1648         return r;
1649 }
1650 #endif /* CONFIG_ALTIVEC */
1651 
1652 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1653 {
1654         int r = 0;
1655         union kvmppc_one_reg val;
1656         int size;
1657 
1658         size = one_reg_size(reg->id);
1659         if (size > sizeof(val))
1660                 return -EINVAL;
1661 
1662         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1663         if (r == -EINVAL) {
1664                 r = 0;
1665                 switch (reg->id) {
1666 #ifdef CONFIG_ALTIVEC
1667                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1668                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1669                                 r = -ENXIO;
1670                                 break;
1671                         }
1672                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1673                         break;
1674                 case KVM_REG_PPC_VSCR:
1675                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1676                                 r = -ENXIO;
1677                                 break;
1678                         }
1679                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1680                         break;
1681                 case KVM_REG_PPC_VRSAVE:
1682                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
1683                         break;
1684 #endif /* CONFIG_ALTIVEC */
1685                 default:
1686                         r = -EINVAL;
1687                         break;
1688                 }
1689         }
1690 
1691         if (r)
1692                 return r;
1693 
1694         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1695                 r = -EFAULT;
1696 
1697         return r;
1698 }
1699 
1700 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1701 {
1702         int r;
1703         union kvmppc_one_reg val;
1704         int size;
1705 
1706         size = one_reg_size(reg->id);
1707         if (size > sizeof(val))
1708                 return -EINVAL;
1709 
1710         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1711                 return -EFAULT;
1712 
1713         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1714         if (r == -EINVAL) {
1715                 r = 0;
1716                 switch (reg->id) {
1717 #ifdef CONFIG_ALTIVEC
1718                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1719                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1720                                 r = -ENXIO;
1721                                 break;
1722                         }
1723                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1724                         break;
1725                 case KVM_REG_PPC_VSCR:
1726                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1727                                 r = -ENXIO;
1728                                 break;
1729                         }
1730                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1731                         break;
1732                 case KVM_REG_PPC_VRSAVE:
1733                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1734                                 r = -ENXIO;
1735                                 break;
1736                         }
1737                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
1738                         break;
1739 #endif /* CONFIG_ALTIVEC */
1740                 default:
1741                         r = -EINVAL;
1742                         break;
1743                 }
1744         }
1745 
1746         return r;
1747 }
1748 
1749 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
1750 {
1751         int r;
1752 
1753         vcpu_load(vcpu);
1754 
1755         if (vcpu->mmio_needed) {
1756                 vcpu->mmio_needed = 0;
1757                 if (!vcpu->mmio_is_write)
1758                         kvmppc_complete_mmio_load(vcpu, run);
1759 #ifdef CONFIG_VSX
1760                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1761                         vcpu->arch.mmio_vsx_copy_nums--;
1762                         vcpu->arch.mmio_vsx_offset++;
1763                 }
1764 
1765                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1766                         r = kvmppc_emulate_mmio_vsx_loadstore(vcpu, run);
1767                         if (r == RESUME_HOST) {
1768                                 vcpu->mmio_needed = 1;
1769                                 goto out;
1770                         }
1771                 }
1772 #endif
1773 #ifdef CONFIG_ALTIVEC
1774                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1775                         vcpu->arch.mmio_vmx_copy_nums--;
1776                         vcpu->arch.mmio_vmx_offset++;
1777                 }
1778 
1779                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1780                         r = kvmppc_emulate_mmio_vmx_loadstore(vcpu, run);
1781                         if (r == RESUME_HOST) {
1782                                 vcpu->mmio_needed = 1;
1783                                 goto out;
1784                         }
1785                 }
1786 #endif
1787         } else if (vcpu->arch.osi_needed) {
1788                 u64 *gprs = run->osi.gprs;
1789                 int i;
1790 
1791                 for (i = 0; i < 32; i++)
1792                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1793                 vcpu->arch.osi_needed = 0;
1794         } else if (vcpu->arch.hcall_needed) {
1795                 int i;
1796 
1797                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1798                 for (i = 0; i < 9; ++i)
1799                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1800                 vcpu->arch.hcall_needed = 0;
1801 #ifdef CONFIG_BOOKE
1802         } else if (vcpu->arch.epr_needed) {
1803                 kvmppc_set_epr(vcpu, run->epr.epr);
1804                 vcpu->arch.epr_needed = 0;
1805 #endif
1806         }
1807 
1808         kvm_sigset_activate(vcpu);
1809 
1810         if (run->immediate_exit)
1811                 r = -EINTR;
1812         else
1813                 r = kvmppc_vcpu_run(run, vcpu);
1814 
1815         kvm_sigset_deactivate(vcpu);
1816 
1817 #ifdef CONFIG_ALTIVEC
1818 out:
1819 #endif
1820         vcpu_put(vcpu);
1821         return r;
1822 }
1823 
1824 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1825 {
1826         if (irq->irq == KVM_INTERRUPT_UNSET) {
1827                 kvmppc_core_dequeue_external(vcpu);
1828                 return 0;
1829         }
1830 
1831         kvmppc_core_queue_external(vcpu, irq);
1832 
1833         kvm_vcpu_kick(vcpu);
1834 
1835         return 0;
1836 }
1837 
1838 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1839                                      struct kvm_enable_cap *cap)
1840 {
1841         int r;
1842 
1843         if (cap->flags)
1844                 return -EINVAL;
1845 
1846         switch (cap->cap) {
1847         case KVM_CAP_PPC_OSI:
1848                 r = 0;
1849                 vcpu->arch.osi_enabled = true;
1850                 break;
1851         case KVM_CAP_PPC_PAPR:
1852                 r = 0;
1853                 vcpu->arch.papr_enabled = true;
1854                 break;
1855         case KVM_CAP_PPC_EPR:
1856                 r = 0;
1857                 if (cap->args[0])
1858                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1859                 else
1860                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1861                 break;
1862 #ifdef CONFIG_BOOKE
1863         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1864                 r = 0;
1865                 vcpu->arch.watchdog_enabled = true;
1866                 break;
1867 #endif
1868 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1869         case KVM_CAP_SW_TLB: {
1870                 struct kvm_config_tlb cfg;
1871                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1872 
1873                 r = -EFAULT;
1874                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1875                         break;
1876 
1877                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1878                 break;
1879         }
1880 #endif
1881 #ifdef CONFIG_KVM_MPIC
1882         case KVM_CAP_IRQ_MPIC: {
1883                 struct fd f;
1884                 struct kvm_device *dev;
1885 
1886                 r = -EBADF;
1887                 f = fdget(cap->args[0]);
1888                 if (!f.file)
1889                         break;
1890 
1891                 r = -EPERM;
1892                 dev = kvm_device_from_filp(f.file);
1893                 if (dev)
1894                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1895 
1896                 fdput(f);
1897                 break;
1898         }
1899 #endif
1900 #ifdef CONFIG_KVM_XICS
1901         case KVM_CAP_IRQ_XICS: {
1902                 struct fd f;
1903                 struct kvm_device *dev;
1904 
1905                 r = -EBADF;
1906                 f = fdget(cap->args[0]);
1907                 if (!f.file)
1908                         break;
1909 
1910                 r = -EPERM;
1911                 dev = kvm_device_from_filp(f.file);
1912                 if (dev) {
1913                         if (xive_enabled())
1914                                 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1915                         else
1916                                 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1917                 }
1918 
1919                 fdput(f);
1920                 break;
1921         }
1922 #endif /* CONFIG_KVM_XICS */
1923 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1924         case KVM_CAP_PPC_FWNMI:
1925                 r = -EINVAL;
1926                 if (!is_kvmppc_hv_enabled(vcpu->kvm))
1927                         break;
1928                 r = 0;
1929                 vcpu->kvm->arch.fwnmi_enabled = true;
1930                 break;
1931 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
1932         default:
1933                 r = -EINVAL;
1934                 break;
1935         }
1936 
1937         if (!r)
1938                 r = kvmppc_sanity_check(vcpu);
1939 
1940         return r;
1941 }
1942 
1943 bool kvm_arch_intc_initialized(struct kvm *kvm)
1944 {
1945 #ifdef CONFIG_KVM_MPIC
1946         if (kvm->arch.mpic)
1947                 return true;
1948 #endif
1949 #ifdef CONFIG_KVM_XICS
1950         if (kvm->arch.xics || kvm->arch.xive)
1951                 return true;
1952 #endif
1953         return false;
1954 }
1955 
1956 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1957                                     struct kvm_mp_state *mp_state)
1958 {
1959         return -EINVAL;
1960 }
1961 
1962 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1963                                     struct kvm_mp_state *mp_state)
1964 {
1965         return -EINVAL;
1966 }
1967 
1968 long kvm_arch_vcpu_async_ioctl(struct file *filp,
1969                                unsigned int ioctl, unsigned long arg)
1970 {
1971         struct kvm_vcpu *vcpu = filp->private_data;
1972         void __user *argp = (void __user *)arg;
1973 
1974         if (ioctl == KVM_INTERRUPT) {
1975                 struct kvm_interrupt irq;
1976                 if (copy_from_user(&irq, argp, sizeof(irq)))
1977                         return -EFAULT;
1978                 return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1979         }
1980         return -ENOIOCTLCMD;
1981 }
1982 
1983 long kvm_arch_vcpu_ioctl(struct file *filp,
1984                          unsigned int ioctl, unsigned long arg)
1985 {
1986         struct kvm_vcpu *vcpu = filp->private_data;
1987         void __user *argp = (void __user *)arg;
1988         long r;
1989 
1990         switch (ioctl) {
1991         case KVM_ENABLE_CAP:
1992         {
1993                 struct kvm_enable_cap cap;
1994                 r = -EFAULT;
1995                 vcpu_load(vcpu);
1996                 if (copy_from_user(&cap, argp, sizeof(cap)))
1997                         goto out;
1998                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1999                 vcpu_put(vcpu);
2000                 break;
2001         }
2002 
2003         case KVM_SET_ONE_REG:
2004         case KVM_GET_ONE_REG:
2005         {
2006                 struct kvm_one_reg reg;
2007                 r = -EFAULT;
2008                 if (copy_from_user(&reg, argp, sizeof(reg)))
2009                         goto out;
2010                 if (ioctl == KVM_SET_ONE_REG)
2011                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
2012                 else
2013                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
2014                 break;
2015         }
2016 
2017 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
2018         case KVM_DIRTY_TLB: {
2019                 struct kvm_dirty_tlb dirty;
2020                 r = -EFAULT;
2021                 vcpu_load(vcpu);
2022                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
2023                         goto out;
2024                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
2025                 vcpu_put(vcpu);
2026                 break;
2027         }
2028 #endif
2029         default:
2030                 r = -EINVAL;
2031         }
2032 
2033 out:
2034         return r;
2035 }
2036 
2037 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2038 {
2039         return VM_FAULT_SIGBUS;
2040 }
2041 
2042 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
2043 {
2044         u32 inst_nop = 0x60000000;
2045 #ifdef CONFIG_KVM_BOOKE_HV
2046         u32 inst_sc1 = 0x44000022;
2047         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
2048         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
2049         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
2050         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2051 #else
2052         u32 inst_lis = 0x3c000000;
2053         u32 inst_ori = 0x60000000;
2054         u32 inst_sc = 0x44000002;
2055         u32 inst_imm_mask = 0xffff;
2056 
2057         /*
2058          * The hypercall to get into KVM from within guest context is as
2059          * follows:
2060          *
2061          *    lis r0, r0, KVM_SC_MAGIC_R0@h
2062          *    ori r0, KVM_SC_MAGIC_R0@l
2063          *    sc
2064          *    nop
2065          */
2066         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
2067         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
2068         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
2069         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2070 #endif
2071 
2072         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
2073 
2074         return 0;
2075 }
2076 
2077 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
2078                           bool line_status)
2079 {
2080         if (!irqchip_in_kernel(kvm))
2081                 return -ENXIO;
2082 
2083         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
2084                                         irq_event->irq, irq_event->level,
2085                                         line_status);
2086         return 0;
2087 }
2088 
2089 
2090 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
2091                                    struct kvm_enable_cap *cap)
2092 {
2093         int r;
2094 
2095         if (cap->flags)
2096                 return -EINVAL;
2097 
2098         switch (cap->cap) {
2099 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
2100         case KVM_CAP_PPC_ENABLE_HCALL: {
2101                 unsigned long hcall = cap->args[0];
2102 
2103                 r = -EINVAL;
2104                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
2105                     cap->args[1] > 1)
2106                         break;
2107                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
2108                         break;
2109                 if (cap->args[1])
2110                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
2111                 else
2112                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
2113                 r = 0;
2114                 break;
2115         }
2116         case KVM_CAP_PPC_SMT: {
2117                 unsigned long mode = cap->args[0];
2118                 unsigned long flags = cap->args[1];
2119 
2120                 r = -EINVAL;
2121                 if (kvm->arch.kvm_ops->set_smt_mode)
2122                         r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
2123                 break;
2124         }
2125 
2126         case KVM_CAP_PPC_NESTED_HV:
2127                 r = -EINVAL;
2128                 if (!is_kvmppc_hv_enabled(kvm) ||
2129                     !kvm->arch.kvm_ops->enable_nested)
2130                         break;
2131                 r = kvm->arch.kvm_ops->enable_nested(kvm);
2132                 break;
2133 #endif
2134         default:
2135                 r = -EINVAL;
2136                 break;
2137         }
2138 
2139         return r;
2140 }
2141 
2142 #ifdef CONFIG_PPC_BOOK3S_64
2143 /*
2144  * These functions check whether the underlying hardware is safe
2145  * against attacks based on observing the effects of speculatively
2146  * executed instructions, and whether it supplies instructions for
2147  * use in workarounds.  The information comes from firmware, either
2148  * via the device tree on powernv platforms or from an hcall on
2149  * pseries platforms.
2150  */
2151 #ifdef CONFIG_PPC_PSERIES
2152 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2153 {
2154         struct h_cpu_char_result c;
2155         unsigned long rc;
2156 
2157         if (!machine_is(pseries))
2158                 return -ENOTTY;
2159 
2160         rc = plpar_get_cpu_characteristics(&c);
2161         if (rc == H_SUCCESS) {
2162                 cp->character = c.character;
2163                 cp->behaviour = c.behaviour;
2164                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2165                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2166                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2167                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2168                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2169                         KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
2170                         KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
2171                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2172                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2173                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2174                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2175         }
2176         return 0;
2177 }
2178 #else
2179 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2180 {
2181         return -ENOTTY;
2182 }
2183 #endif
2184 
2185 static inline bool have_fw_feat(struct device_node *fw_features,
2186                                 const char *state, const char *name)
2187 {
2188         struct device_node *np;
2189         bool r = false;
2190 
2191         np = of_get_child_by_name(fw_features, name);
2192         if (np) {
2193                 r = of_property_read_bool(np, state);
2194                 of_node_put(np);
2195         }
2196         return r;
2197 }
2198 
2199 static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2200 {
2201         struct device_node *np, *fw_features;
2202         int r;
2203 
2204         memset(cp, 0, sizeof(*cp));
2205         r = pseries_get_cpu_char(cp);
2206         if (r != -ENOTTY)
2207                 return r;
2208 
2209         np = of_find_node_by_name(NULL, "ibm,opal");
2210         if (np) {
2211                 fw_features = of_get_child_by_name(np, "fw-features");
2212                 of_node_put(np);
2213                 if (!fw_features)
2214                         return 0;
2215                 if (have_fw_feat(fw_features, "enabled",
2216                                  "inst-spec-barrier-ori31,31,0"))
2217                         cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31;
2218                 if (have_fw_feat(fw_features, "enabled",
2219                                  "fw-bcctrl-serialized"))
2220                         cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED;
2221                 if (have_fw_feat(fw_features, "enabled",
2222                                  "inst-l1d-flush-ori30,30,0"))
2223                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30;
2224                 if (have_fw_feat(fw_features, "enabled",
2225                                  "inst-l1d-flush-trig2"))
2226                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2;
2227                 if (have_fw_feat(fw_features, "enabled",
2228                                  "fw-l1d-thread-split"))
2229                         cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV;
2230                 if (have_fw_feat(fw_features, "enabled",
2231                                  "fw-count-cache-disabled"))
2232                         cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2233                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2234                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2235                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2236                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2237                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2238                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2239 
2240                 if (have_fw_feat(fw_features, "enabled",
2241                                  "speculation-policy-favor-security"))
2242                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY;
2243                 if (!have_fw_feat(fw_features, "disabled",
2244                                   "needs-l1d-flush-msr-pr-0-to-1"))
2245                         cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR;
2246                 if (!have_fw_feat(fw_features, "disabled",
2247                                   "needs-spec-barrier-for-bound-checks"))
2248                         cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2249                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2250                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2251                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2252 
2253                 of_node_put(fw_features);
2254         }
2255 
2256         return 0;
2257 }
2258 #endif
2259 
2260 long kvm_arch_vm_ioctl(struct file *filp,
2261                        unsigned int ioctl, unsigned long arg)
2262 {
2263         struct kvm *kvm __maybe_unused = filp->private_data;
2264         void __user *argp = (void __user *)arg;
2265         long r;
2266 
2267         switch (ioctl) {
2268         case KVM_PPC_GET_PVINFO: {
2269                 struct kvm_ppc_pvinfo pvinfo;
2270                 memset(&pvinfo, 0, sizeof(pvinfo));
2271                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
2272                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
2273                         r = -EFAULT;
2274                         goto out;
2275                 }
2276 
2277                 break;
2278         }
2279         case KVM_ENABLE_CAP:
2280         {
2281                 struct kvm_enable_cap cap;
2282                 r = -EFAULT;
2283                 if (copy_from_user(&cap, argp, sizeof(cap)))
2284                         goto out;
2285                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
2286                 break;
2287         }
2288 #ifdef CONFIG_SPAPR_TCE_IOMMU
2289         case KVM_CREATE_SPAPR_TCE_64: {
2290                 struct kvm_create_spapr_tce_64 create_tce_64;
2291 
2292                 r = -EFAULT;
2293                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
2294                         goto out;
2295                 if (create_tce_64.flags) {
2296                         r = -EINVAL;
2297                         goto out;
2298                 }
2299                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2300                 goto out;
2301         }
2302         case KVM_CREATE_SPAPR_TCE: {
2303                 struct kvm_create_spapr_tce create_tce;
2304                 struct kvm_create_spapr_tce_64 create_tce_64;
2305 
2306                 r = -EFAULT;
2307                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
2308                         goto out;
2309 
2310                 create_tce_64.liobn = create_tce.liobn;
2311                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
2312                 create_tce_64.offset = 0;
2313                 create_tce_64.size = create_tce.window_size >>
2314                                 IOMMU_PAGE_SHIFT_4K;
2315                 create_tce_64.flags = 0;
2316                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2317                 goto out;
2318         }
2319 #endif
2320 #ifdef CONFIG_PPC_BOOK3S_64
2321         case KVM_PPC_GET_SMMU_INFO: {
2322                 struct kvm_ppc_smmu_info info;
2323                 struct kvm *kvm = filp->private_data;
2324 
2325                 memset(&info, 0, sizeof(info));
2326                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2327                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2328                         r = -EFAULT;
2329                 break;
2330         }
2331         case KVM_PPC_RTAS_DEFINE_TOKEN: {
2332                 struct kvm *kvm = filp->private_data;
2333 
2334                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
2335                 break;
2336         }
2337         case KVM_PPC_CONFIGURE_V3_MMU: {
2338                 struct kvm *kvm = filp->private_data;
2339                 struct kvm_ppc_mmuv3_cfg cfg;
2340 
2341                 r = -EINVAL;
2342                 if (!kvm->arch.kvm_ops->configure_mmu)
2343                         goto out;
2344                 r = -EFAULT;
2345                 if (copy_from_user(&cfg, argp, sizeof(cfg)))
2346                         goto out;
2347                 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
2348                 break;
2349         }
2350         case KVM_PPC_GET_RMMU_INFO: {
2351                 struct kvm *kvm = filp->private_data;
2352                 struct kvm_ppc_rmmu_info info;
2353 
2354                 r = -EINVAL;
2355                 if (!kvm->arch.kvm_ops->get_rmmu_info)
2356                         goto out;
2357                 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
2358                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2359                         r = -EFAULT;
2360                 break;
2361         }
2362         case KVM_PPC_GET_CPU_CHAR: {
2363                 struct kvm_ppc_cpu_char cpuchar;
2364 
2365                 r = kvmppc_get_cpu_char(&cpuchar);
2366                 if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar)))
2367                         r = -EFAULT;
2368                 break;
2369         }
2370         default: {
2371                 struct kvm *kvm = filp->private_data;
2372                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
2373         }
2374 #else /* CONFIG_PPC_BOOK3S_64 */
2375         default:
2376                 r = -ENOTTY;
2377 #endif
2378         }
2379 out:
2380         return r;
2381 }
2382 
2383 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
2384 static unsigned long nr_lpids;
2385 
2386 long kvmppc_alloc_lpid(void)
2387 {
2388         long lpid;
2389 
2390         do {
2391                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
2392                 if (lpid >= nr_lpids) {
2393                         pr_err("%s: No LPIDs free\n", __func__);
2394                         return -ENOMEM;
2395                 }
2396         } while (test_and_set_bit(lpid, lpid_inuse));
2397 
2398         return lpid;
2399 }
2400 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2401 
2402 void kvmppc_claim_lpid(long lpid)
2403 {
2404         set_bit(lpid, lpid_inuse);
2405 }
2406 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
2407 
2408 void kvmppc_free_lpid(long lpid)
2409 {
2410         clear_bit(lpid, lpid_inuse);
2411 }
2412 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2413 
2414 void kvmppc_init_lpid(unsigned long nr_lpids_param)
2415 {
2416         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
2417         memset(lpid_inuse, 0, sizeof(lpid_inuse));
2418 }
2419 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2420 
2421 int kvm_arch_init(void *opaque)
2422 {
2423         return 0;
2424 }
2425 
2426 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);
2427 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp