arch/powerpc/kvm/powerpc.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License, version 2, as
   4  * published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public License
  12  * along with this program; if not, write to the Free Software
  13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14  *
  15  * Copyright IBM Corp. 2007
  16  *
  17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
  19  */
  20
  21 #include <linux/errno.h>
  22 #include <linux/err.h>
  23 #include <linux/kvm_host.h>
  24 #include <linux/vmalloc.h>
  25 #include <linux/hrtimer.h>
  26 #include <linux/sched/signal.h>
  27 #include <linux/fs.h>
  28 #include <linux/slab.h>
  29 #include <linux/file.h>
  30 #include <linux/module.h>
  31 #include <linux/irqbypass.h>
  32 #include <linux/kvm_irqfd.h>
  33 #include <asm/cputable.h>
  34 #include <linux/uaccess.h>
  35 #include <asm/kvm_ppc.h>
  36 #include <asm/tlbflush.h>
  37 #include <asm/cputhreads.h>
  38 #include <asm/irqflags.h>
  39 #include <asm/iommu.h>
  40 #include <asm/switch_to.h>
  41 #include <asm/xive.h>
  42
  43 #include "timing.h"
  44 #include "irq.h"
  45 #include "../mm/mmu_decl.h"
  46
  47 #define CREATE_TRACE_POINTS
  48 #include "trace.h"
  49
  50 struct kvmppc_ops *kvmppc_hv_ops;
  51 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
  52 struct kvmppc_ops *kvmppc_pr_ops;
  53 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
  54
  55
  56 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  57 {
  58         return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
  59 }
  60
  61 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
  62 {
  63         return false;
  64 }
  65
  66 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  67 {
  68         return 1;
  69 }
  70
  71 /*
  72  * Common checks before entering the guest world.  Call with interrupts
  73  * disabled.
  74  *
  75  * returns:
  76  *
  77  * == 1 if we're ready to go into guest state
  78  * <= 0 if we need to go back to the host with return value
  79  */
  80 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
  81 {
  82         int r;
  83
  84         WARN_ON(irqs_disabled());
  85         hard_irq_disable();
  86
  87         while (true) {
  88                 if (need_resched()) {
  89                         local_irq_enable();
  90                         cond_resched();
  91                         hard_irq_disable();
  92                         continue;
  93                 }
  94
  95                 if (signal_pending(current)) {
  96                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
  97                         vcpu->run->exit_reason = KVM_EXIT_INTR;
  98                         r = -EINTR;
  99                         break;
 100                 }
 101
 102                 vcpu->mode = IN_GUEST_MODE;
 103
 104                 /*
 105                  * Reading vcpu->requests must happen after setting vcpu->mode,
 106                  * so we don't miss a request because the requester sees
 107                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
 108                  * before next entering the guest (and thus doesn't IPI).
 109                  * This also orders the write to mode from any reads
 110                  * to the page tables done while the VCPU is running.
 111                  * Please see the comment in kvm_flush_remote_tlbs.
 112                  */
 113                 smp_mb();
 114
 115                 if (kvm_request_pending(vcpu)) {
 116                         /* Make sure we process requests preemptable */
 117                         local_irq_enable();
 118                         trace_kvm_check_requests(vcpu);
 119                         r = kvmppc_core_check_requests(vcpu);
 120                         hard_irq_disable();
 121                         if (r > 0)
 122                                 continue;
 123                         break;
 124                 }
 125
 126                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 127                         /* interrupts got enabled in between, so we
 128                            are back at square 1 */
 129                         continue;
 130                 }
 131
 132                 guest_enter_irqoff();
 133                 return 1;
 134         }
 135
 136         /* return to host */
 137         local_irq_enable();
 138         return r;
 139 }
 140 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
 141
 142 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 143 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
 144 {
 145         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
 146         int i;
 147
 148         shared->sprg0 = swab64(shared->sprg0);
 149         shared->sprg1 = swab64(shared->sprg1);
 150         shared->sprg2 = swab64(shared->sprg2);
 151         shared->sprg3 = swab64(shared->sprg3);
 152         shared->srr0 = swab64(shared->srr0);
 153         shared->srr1 = swab64(shared->srr1);
 154         shared->dar = swab64(shared->dar);
 155         shared->msr = swab64(shared->msr);
 156         shared->dsisr = swab32(shared->dsisr);
 157         shared->int_pending = swab32(shared->int_pending);
 158         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
 159                 shared->sr[i] = swab32(shared->sr[i]);
 160 }
 161 #endif
 162
 163 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
 164 {
 165         int nr = kvmppc_get_gpr(vcpu, 11);
 166         int r;
 167         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
 168         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
 169         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
 170         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
 171         unsigned long r2 = 0;
 172
 173         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 174                 /* 32 bit mode */
 175                 param1 &= 0xffffffff;
 176                 param2 &= 0xffffffff;
 177                 param3 &= 0xffffffff;
 178                 param4 &= 0xffffffff;
 179         }
 180
 181         switch (nr) {
 182         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
 183         {
 184 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 185                 /* Book3S can be little endian, find it out here */
 186                 int shared_big_endian = true;
 187                 if (vcpu->arch.intr_msr & MSR_LE)
 188                         shared_big_endian = false;
 189                 if (shared_big_endian != vcpu->arch.shared_big_endian)
 190                         kvmppc_swab_shared(vcpu);
 191                 vcpu->arch.shared_big_endian = shared_big_endian;
 192 #endif
 193
 194                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
 195                         /*
 196                          * Older versions of the Linux magic page code had
 197                          * a bug where they would map their trampoline code
 198                          * NX. If that's the case, remove !PR NX capability.
 199                          */
 200                         vcpu->arch.disable_kernel_nx = true;
 201                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 202                 }
 203
 204                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
 205                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
 206
 207 #ifdef CONFIG_PPC_64K_PAGES
 208                 /*
 209                  * Make sure our 4k magic page is in the same window of a 64k
 210                  * page within the guest and within the host's page.
 211                  */
 212                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
 213                     ((ulong)vcpu->arch.shared & 0xf000)) {
 214                         void *old_shared = vcpu->arch.shared;
 215                         ulong shared = (ulong)vcpu->arch.shared;
 216                         void *new_shared;
 217
 218                         shared &= PAGE_MASK;
 219                         shared |= vcpu->arch.magic_page_pa & 0xf000;
 220                         new_shared = (void*)shared;
 221                         memcpy(new_shared, old_shared, 0x1000);
 222                         vcpu->arch.shared = new_shared;
 223                 }
 224 #endif
 225
 226                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
 227
 228                 r = EV_SUCCESS;
 229                 break;
 230         }
 231         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
 232                 r = EV_SUCCESS;
 233 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
 234                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
 235 #endif
 236
 237                 /* Second return value is in r4 */
 238                 break;
 239         case EV_HCALL_TOKEN(EV_IDLE):
 240                 r = EV_SUCCESS;
 241                 kvm_vcpu_block(vcpu);
 242                 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
 243                 break;
 244         default:
 245                 r = EV_UNIMPLEMENTED;
 246                 break;
 247         }
 248
 249         kvmppc_set_gpr(vcpu, 4, r2);
 250
 251         return r;
 252 }
 253 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
 254
 255 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 256 {
 257         int r = false;
 258
 259         /* We have to know what CPU to virtualize */
 260         if (!vcpu->arch.pvr)
 261                 goto out;
 262
 263         /* PAPR only works with book3s_64 */
 264         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 265                 goto out;
 266
 267         /* HV KVM can only do PAPR mode for now */
 268         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
 269                 goto out;
 270
 271 #ifdef CONFIG_KVM_BOOKE_HV
 272         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 273                 goto out;
 274 #endif
 275
 276         r = true;
 277
 278 out:
 279         vcpu->arch.sane = r;
 280         return r ? 0 : -EINVAL;
 281 }
 282 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
 283
 284 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 285 {
 286         enum emulation_result er;
 287         int r;
 288
 289         er = kvmppc_emulate_loadstore(vcpu);
 290         switch (er) {
 291         case EMULATE_DONE:
 292                 /* Future optimization: only reload non-volatiles if they were
 293                  * actually modified. */
 294                 r = RESUME_GUEST_NV;
 295                 break;
 296         case EMULATE_AGAIN:
 297                 r = RESUME_GUEST;
 298                 break;
 299         case EMULATE_DO_MMIO:
 300                 run->exit_reason = KVM_EXIT_MMIO;
 301                 /* We must reload nonvolatiles because "update" load/store
 302                  * instructions modify register state. */
 303                 /* Future optimization: only reload non-volatiles if they were
 304                  * actually modified. */
 305                 r = RESUME_HOST_NV;
 306                 break;
 307         case EMULATE_FAIL:
 308         {
 309                 u32 last_inst;
 310
 311                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
 312                 /* XXX Deliver Program interrupt to guest. */
 313                 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
 314                 r = RESUME_HOST;
 315                 break;
 316         }
 317         default:
 318                 WARN_ON(1);
 319                 r = RESUME_GUEST;
 320         }
 321
 322         return r;
 323 }
 324 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
 325
 326 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 327               bool data)
 328 {
 329         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 330         struct kvmppc_pte pte;
 331         int r;
 332
 333         vcpu->stat.st++;
 334
 335         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 336                          XLATE_WRITE, &pte);
 337         if (r < 0)
 338                 return r;
 339
 340         *eaddr = pte.raddr;
 341
 342         if (!pte.may_write)
 343                 return -EPERM;
 344
 345         /* Magic page override */
 346         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 347             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 348             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 349                 void *magic = vcpu->arch.shared;
 350                 magic += pte.eaddr & 0xfff;
 351                 memcpy(magic, ptr, size);
 352                 return EMULATE_DONE;
 353         }
 354
 355         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 356                 return EMULATE_DO_MMIO;
 357
 358         return EMULATE_DONE;
 359 }
 360 EXPORT_SYMBOL_GPL(kvmppc_st);
 361
 362 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 363                       bool data)
 364 {
 365         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 366         struct kvmppc_pte pte;
 367         int rc;
 368
 369         vcpu->stat.ld++;
 370
 371         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 372                           XLATE_READ, &pte);
 373         if (rc)
 374                 return rc;
 375
 376         *eaddr = pte.raddr;
 377
 378         if (!pte.may_read)
 379                 return -EPERM;
 380
 381         if (!data && !pte.may_execute)
 382                 return -ENOEXEC;
 383
 384         /* Magic page override */
 385         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 386             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 387             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 388                 void *magic = vcpu->arch.shared;
 389                 magic += pte.eaddr & 0xfff;
 390                 memcpy(ptr, magic, size);
 391                 return EMULATE_DONE;
 392         }
 393
 394         if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
 395                 return EMULATE_DO_MMIO;
 396
 397         return EMULATE_DONE;
 398 }
 399 EXPORT_SYMBOL_GPL(kvmppc_ld);
 400
 401 int kvm_arch_hardware_enable(void)
 402 {
 403         return 0;
 404 }
 405
 406 int kvm_arch_hardware_setup(void)
 407 {
 408         return 0;
 409 }
 410
 411 void kvm_arch_check_processor_compat(void *rtn)
 412 {
 413         *(int *)rtn = kvmppc_core_check_processor_compat();
 414 }
 415
 416 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 417 {
 418         struct kvmppc_ops *kvm_ops = NULL;
 419         /*
 420          * if we have both HV and PR enabled, default is HV
 421          */
 422         if (type == 0) {
 423                 if (kvmppc_hv_ops)
 424                         kvm_ops = kvmppc_hv_ops;
 425                 else
 426                         kvm_ops = kvmppc_pr_ops;
 427                 if (!kvm_ops)
 428                         goto err_out;
 429         } else  if (type == KVM_VM_PPC_HV) {
 430                 if (!kvmppc_hv_ops)
 431                         goto err_out;
 432                 kvm_ops = kvmppc_hv_ops;
 433         } else if (type == KVM_VM_PPC_PR) {
 434                 if (!kvmppc_pr_ops)
 435                         goto err_out;
 436                 kvm_ops = kvmppc_pr_ops;
 437         } else
 438                 goto err_out;
 439
 440         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
 441                 return -ENOENT;
 442
 443         kvm->arch.kvm_ops = kvm_ops;
 444         return kvmppc_core_init_vm(kvm);
 445 err_out:
 446         return -EINVAL;
 447 }
 448
 449 bool kvm_arch_has_vcpu_debugfs(void)
 450 {
 451         return false;
 452 }
 453
 454 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
 455 {
 456         return 0;
 457 }
 458
 459 void kvm_arch_destroy_vm(struct kvm *kvm)
 460 {
 461         unsigned int i;
 462         struct kvm_vcpu *vcpu;
 463
 464 #ifdef CONFIG_KVM_XICS
 465         /*
 466          * We call kick_all_cpus_sync() to ensure that all
 467          * CPUs have executed any pending IPIs before we
 468          * continue and free VCPUs structures below.
 469          */
 470         if (is_kvmppc_hv_enabled(kvm))
 471                 kick_all_cpus_sync();
 472 #endif
 473
 474         kvm_for_each_vcpu(i, vcpu, kvm)
 475                 kvm_arch_vcpu_free(vcpu);
 476
 477         mutex_lock(&kvm->lock);
 478         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 479                 kvm->vcpus[i] = NULL;
 480
 481         atomic_set(&kvm->online_vcpus, 0);
 482
 483         kvmppc_core_destroy_vm(kvm);
 484
 485         mutex_unlock(&kvm->lock);
 486
 487         /* drop the module reference */
 488         module_put(kvm->arch.kvm_ops->owner);
 489 }
 490
 491 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 492 {
 493         int r;
 494         /* Assume we're using HV mode when the HV module is loaded */
 495         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 496
 497         if (kvm) {
 498                 /*
 499                  * Hooray - we know which VM type we're running on. Depend on
 500                  * that rather than the guess above.
 501                  */
 502                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 503         }
 504
 505         switch (ext) {
 506 #ifdef CONFIG_BOOKE
 507         case KVM_CAP_PPC_BOOKE_SREGS:
 508         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 509         case KVM_CAP_PPC_EPR:
 510 #else
 511         case KVM_CAP_PPC_SEGSTATE:
 512         case KVM_CAP_PPC_HIOR:
 513         case KVM_CAP_PPC_PAPR:
 514 #endif
 515         case KVM_CAP_PPC_UNSET_IRQ:
 516         case KVM_CAP_PPC_IRQ_LEVEL:
 517         case KVM_CAP_ENABLE_CAP:
 518         case KVM_CAP_ENABLE_CAP_VM:
 519         case KVM_CAP_ONE_REG:
 520         case KVM_CAP_IOEVENTFD:
 521         case KVM_CAP_DEVICE_CTRL:
 522         case KVM_CAP_IMMEDIATE_EXIT:
 523                 r = 1;
 524                 break;
 525         case KVM_CAP_PPC_PAIRED_SINGLES:
 526         case KVM_CAP_PPC_OSI:
 527         case KVM_CAP_PPC_GET_PVINFO:
 528 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 529         case KVM_CAP_SW_TLB:
 530 #endif
 531                 /* We support this only for PR */
 532                 r = !hv_enabled;
 533                 break;
 534 #ifdef CONFIG_KVM_MPIC
 535         case KVM_CAP_IRQ_MPIC:
 536                 r = 1;
 537                 break;
 538 #endif
 539
 540 #ifdef CONFIG_PPC_BOOK3S_64
 541         case KVM_CAP_SPAPR_TCE:
 542         case KVM_CAP_SPAPR_TCE_64:
 543                 /* fallthrough */
 544         case KVM_CAP_SPAPR_TCE_VFIO:
 545         case KVM_CAP_PPC_RTAS:
 546         case KVM_CAP_PPC_FIXUP_HCALL:
 547         case KVM_CAP_PPC_ENABLE_HCALL:
 548 #ifdef CONFIG_KVM_XICS
 549         case KVM_CAP_IRQ_XICS:
 550 #endif
 551                 r = 1;
 552                 break;
 553
 554         case KVM_CAP_PPC_ALLOC_HTAB:
 555                 r = hv_enabled;
 556                 break;
 557 #endif /* CONFIG_PPC_BOOK3S_64 */
 558 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 559         case KVM_CAP_PPC_SMT:
 560                 r = 0;
 561                 if (kvm) {
 562                         if (kvm->arch.emul_smt_mode > 1)
 563                                 r = kvm->arch.emul_smt_mode;
 564                         else
 565                                 r = kvm->arch.smt_mode;
 566                 } else if (hv_enabled) {
 567                         if (cpu_has_feature(CPU_FTR_ARCH_300))
 568                                 r = 1;
 569                         else
 570                                 r = threads_per_subcore;
 571                 }
 572                 break;
 573         case KVM_CAP_PPC_SMT_POSSIBLE:
 574                 r = 1;
 575                 if (hv_enabled) {
 576                         if (!cpu_has_feature(CPU_FTR_ARCH_300))
 577                                 r = ((threads_per_subcore << 1) - 1);
 578                         else
 579                                 /* P9 can emulate dbells, so allow any mode */
 580                                 r = 8 | 4 | 2 | 1;
 581                 }
 582                 break;
 583         case KVM_CAP_PPC_RMA:
 584                 r = 0;
 585                 break;
 586         case KVM_CAP_PPC_HWRNG:
 587                 r = kvmppc_hwrng_present();
 588                 break;
 589         case KVM_CAP_PPC_MMU_RADIX:
 590                 r = !!(hv_enabled && radix_enabled());
 591                 break;
 592         case KVM_CAP_PPC_MMU_HASH_V3:
 593                 r = !!(hv_enabled && !radix_enabled() &&
 594                        cpu_has_feature(CPU_FTR_ARCH_300));
 595                 break;
 596 #endif
 597         case KVM_CAP_SYNC_MMU:
 598 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 599                 r = hv_enabled;
 600 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 601                 r = 1;
 602 #else
 603                 r = 0;
 604 #endif
 605                 break;
 606 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 607         case KVM_CAP_PPC_HTAB_FD:
 608                 r = hv_enabled;
 609                 break;
 610 #endif
 611         case KVM_CAP_NR_VCPUS:
 612                 /*
 613                  * Recommending a number of CPUs is somewhat arbitrary; we
 614                  * return the number of present CPUs for -HV (since a host
 615                  * will have secondary threads "offline"), and for other KVM
 616                  * implementations just count online CPUs.
 617                  */
 618                 if (hv_enabled)
 619                         r = num_present_cpus();
 620                 else
 621                         r = num_online_cpus();
 622                 break;
 623         case KVM_CAP_NR_MEMSLOTS:
 624                 r = KVM_USER_MEM_SLOTS;
 625                 break;
 626         case KVM_CAP_MAX_VCPUS:
 627                 r = KVM_MAX_VCPUS;
 628                 break;
 629 #ifdef CONFIG_PPC_BOOK3S_64
 630         case KVM_CAP_PPC_GET_SMMU_INFO:
 631                 r = 1;
 632                 break;
 633         case KVM_CAP_SPAPR_MULTITCE:
 634                 r = 1;
 635                 break;
 636         case KVM_CAP_SPAPR_RESIZE_HPT:
 637                 /* Disable this on POWER9 until code handles new HPTE format */
 638                 r = !!hv_enabled && !cpu_has_feature(CPU_FTR_ARCH_300);
 639                 break;
 640 #endif
 641 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 642         case KVM_CAP_PPC_FWNMI:
 643                 r = hv_enabled;
 644                 break;
 645 #endif
 646         case KVM_CAP_PPC_HTM:
 647                 r = cpu_has_feature(CPU_FTR_TM_COMP) &&
 648                     is_kvmppc_hv_enabled(kvm);
 649                 break;
 650         default:
 651                 r = 0;
 652                 break;
 653         }
 654         return r;
 655
 656 }
 657
 658 long kvm_arch_dev_ioctl(struct file *filp,
 659                         unsigned int ioctl, unsigned long arg)
 660 {
 661         return -EINVAL;
 662 }
 663
 664 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 665                            struct kvm_memory_slot *dont)
 666 {
 667         kvmppc_core_free_memslot(kvm, free, dont);
 668 }
 669
 670 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 671                             unsigned long npages)
 672 {
 673         return kvmppc_core_create_memslot(kvm, slot, npages);
 674 }
 675
 676 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 677                                    struct kvm_memory_slot *memslot,
 678                                    const struct kvm_userspace_memory_region *mem,
 679                                    enum kvm_mr_change change)
 680 {
 681         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 682 }
 683
 684 void kvm_arch_commit_memory_region(struct kvm *kvm,
 685                                    const struct kvm_userspace_memory_region *mem,
 686                                    const struct kvm_memory_slot *old,
 687                                    const struct kvm_memory_slot *new,
 688                                    enum kvm_mr_change change)
 689 {
 690         kvmppc_core_commit_memory_region(kvm, mem, old, new);
 691 }
 692
 693 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 694                                    struct kvm_memory_slot *slot)
 695 {
 696         kvmppc_core_flush_memslot(kvm, slot);
 697 }
 698
 699 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 700 {
 701         struct kvm_vcpu *vcpu;
 702         vcpu = kvmppc_core_vcpu_create(kvm, id);
 703         if (!IS_ERR(vcpu)) {
 704                 vcpu->arch.wqp = &vcpu->wq;
 705                 kvmppc_create_vcpu_debugfs(vcpu, id);
 706         }
 707         return vcpu;
 708 }
 709
 710 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 711 {
 712 }
 713
 714 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 715 {
 716         /* Make sure we're not using the vcpu anymore */
 717         hrtimer_cancel(&vcpu->arch.dec_timer);
 718
 719         kvmppc_remove_vcpu_debugfs(vcpu);
 720
 721         switch (vcpu->arch.irq_type) {
 722         case KVMPPC_IRQ_MPIC:
 723                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 724                 break;
 725         case KVMPPC_IRQ_XICS:
 726                 if (xive_enabled())
 727                         kvmppc_xive_cleanup_vcpu(vcpu);
 728                 else
 729                         kvmppc_xics_free_icp(vcpu);
 730                 break;
 731         }
 732
 733         kvmppc_core_vcpu_free(vcpu);
 734 }
 735
 736 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 737 {
 738         kvm_arch_vcpu_free(vcpu);
 739 }
 740
 741 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 742 {
 743         return kvmppc_core_pending_dec(vcpu);
 744 }
 745
 746 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 747 {
 748         struct kvm_vcpu *vcpu;
 749
 750         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 751         kvmppc_decrementer_func(vcpu);
 752
 753         return HRTIMER_NORESTART;
 754 }
 755
 756 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 757 {
 758         int ret;
 759
 760         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 761         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 762         vcpu->arch.dec_expires = ~(u64)0;
 763
 764 #ifdef CONFIG_KVM_EXIT_TIMING
 765         mutex_init(&vcpu->arch.exit_timing_lock);
 766 #endif
 767         ret = kvmppc_subarch_vcpu_init(vcpu);
 768         return ret;
 769 }
 770
 771 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 772 {
 773         kvmppc_mmu_destroy(vcpu);
 774         kvmppc_subarch_vcpu_uninit(vcpu);
 775 }
 776
 777 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 778 {
 779 #ifdef CONFIG_BOOKE
 780         /*
 781          * vrsave (formerly usprg0) isn't used by Linux, but may
 782          * be used by the guest.
 783          *
 784          * On non-booke this is associated with Altivec and
 785          * is handled by code in book3s.c.
 786          */
 787         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 788 #endif
 789         kvmppc_core_vcpu_load(vcpu, cpu);
 790 }
 791
 792 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 793 {
 794         kvmppc_core_vcpu_put(vcpu);
 795 #ifdef CONFIG_BOOKE
 796         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 797 #endif
 798 }
 799
 800 /*
 801  * irq_bypass_add_producer and irq_bypass_del_producer are only
 802  * useful if the architecture supports PCI passthrough.
 803  * irq_bypass_stop and irq_bypass_start are not needed and so
 804  * kvm_ops are not defined for them.
 805  */
 806 bool kvm_arch_has_irq_bypass(void)
 807 {
 808         return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
 809                 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
 810 }
 811
 812 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
 813                                      struct irq_bypass_producer *prod)
 814 {
 815         struct kvm_kernel_irqfd *irqfd =
 816                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 817         struct kvm *kvm = irqfd->kvm;
 818
 819         if (kvm->arch.kvm_ops->irq_bypass_add_producer)
 820                 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
 821
 822         return 0;
 823 }
 824
 825 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
 826                                       struct irq_bypass_producer *prod)
 827 {
 828         struct kvm_kernel_irqfd *irqfd =
 829                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 830         struct kvm *kvm = irqfd->kvm;
 831
 832         if (kvm->arch.kvm_ops->irq_bypass_del_producer)
 833                 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
 834 }
 835
 836 #ifdef CONFIG_VSX
 837 static inline int kvmppc_get_vsr_dword_offset(int index)
 838 {
 839         int offset;
 840
 841         if ((index != 0) && (index != 1))
 842                 return -1;
 843
 844 #ifdef __BIG_ENDIAN
 845         offset =  index;
 846 #else
 847         offset = 1 - index;
 848 #endif
 849
 850         return offset;
 851 }
 852
 853 static inline int kvmppc_get_vsr_word_offset(int index)
 854 {
 855         int offset;
 856
 857         if ((index > 3) || (index < 0))
 858                 return -1;
 859
 860 #ifdef __BIG_ENDIAN
 861         offset = index;
 862 #else
 863         offset = 3 - index;
 864 #endif
 865         return offset;
 866 }
 867
 868 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
 869         u64 gpr)
 870 {
 871         union kvmppc_one_reg val;
 872         int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
 873         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 874
 875         if (offset == -1)
 876                 return;
 877
 878         if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
 879                 val.vval = VCPU_VSX_VR(vcpu, index);
 880                 val.vsxval[offset] = gpr;
 881                 VCPU_VSX_VR(vcpu, index) = val.vval;
 882         } else {
 883                 VCPU_VSX_FPR(vcpu, index, offset) = gpr;
 884         }
 885 }
 886
 887 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
 888         u64 gpr)
 889 {
 890         union kvmppc_one_reg val;
 891         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 892
 893         if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
 894                 val.vval = VCPU_VSX_VR(vcpu, index);
 895                 val.vsxval[0] = gpr;
 896                 val.vsxval[1] = gpr;
 897                 VCPU_VSX_VR(vcpu, index) = val.vval;
 898         } else {
 899                 VCPU_VSX_FPR(vcpu, index, 0) = gpr;
 900                 VCPU_VSX_FPR(vcpu, index, 1) = gpr;
 901         }
 902 }
 903
 904 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
 905         u32 gpr32)
 906 {
 907         union kvmppc_one_reg val;
 908         int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
 909         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 910         int dword_offset, word_offset;
 911
 912         if (offset == -1)
 913                 return;
 914
 915         if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
 916                 val.vval = VCPU_VSX_VR(vcpu, index);
 917                 val.vsx32val[offset] = gpr32;
 918                 VCPU_VSX_VR(vcpu, index) = val.vval;
 919         } else {
 920                 dword_offset = offset / 2;
 921                 word_offset = offset % 2;
 922                 val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
 923                 val.vsx32val[word_offset] = gpr32;
 924                 VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
 925         }
 926 }
 927 #endif /* CONFIG_VSX */
 928
 929 #ifdef CONFIG_PPC_FPU
 930 static inline u64 sp_to_dp(u32 fprs)
 931 {
 932         u64 fprd;
 933
 934         preempt_disable();
 935         enable_kernel_fp();
 936         asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m" (fprd) : "m" (fprs)
 937              : "fr0");
 938         preempt_enable();
 939         return fprd;
 940 }
 941
 942 static inline u32 dp_to_sp(u64 fprd)
 943 {
 944         u32 fprs;
 945
 946         preempt_disable();
 947         enable_kernel_fp();
 948         asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m" (fprs) : "m" (fprd)
 949              : "fr0");
 950         preempt_enable();
 951         return fprs;
 952 }
 953
 954 #else
 955 #define sp_to_dp(x)     (x)
 956 #define dp_to_sp(x)     (x)
 957 #endif /* CONFIG_PPC_FPU */
 958
 959 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 960                                       struct kvm_run *run)
 961 {
 962         u64 uninitialized_var(gpr);
 963
 964         if (run->mmio.len > sizeof(gpr)) {
 965                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 966                 return;
 967         }
 968
 969         if (!vcpu->arch.mmio_host_swabbed) {
 970                 switch (run->mmio.len) {
 971                 case 8: gpr = *(u64 *)run->mmio.data; break;
 972                 case 4: gpr = *(u32 *)run->mmio.data; break;
 973                 case 2: gpr = *(u16 *)run->mmio.data; break;
 974                 case 1: gpr = *(u8 *)run->mmio.data; break;
 975                 }
 976         } else {
 977                 switch (run->mmio.len) {
 978                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
 979                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
 980                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
 981                 case 1: gpr = *(u8 *)run->mmio.data; break;
 982                 }
 983         }
 984
 985         /* conversion between single and double precision */
 986         if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
 987                 gpr = sp_to_dp(gpr);
 988
 989         if (vcpu->arch.mmio_sign_extend) {
 990                 switch (run->mmio.len) {
 991 #ifdef CONFIG_PPC64
 992                 case 4:
 993                         gpr = (s64)(s32)gpr;
 994                         break;
 995 #endif
 996                 case 2:
 997                         gpr = (s64)(s16)gpr;
 998                         break;
 999                 case 1:
1000                         gpr = (s64)(s8)gpr;
1001                         break;
1002                 }
1003         }
1004
1005         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1006         case KVM_MMIO_REG_GPR:
1007                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1008                 break;
1009         case KVM_MMIO_REG_FPR:
1010                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1011                 break;
1012 #ifdef CONFIG_PPC_BOOK3S
1013         case KVM_MMIO_REG_QPR:
1014                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1015                 break;
1016         case KVM_MMIO_REG_FQPR:
1017                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1018                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1019                 break;
1020 #endif
1021 #ifdef CONFIG_VSX
1022         case KVM_MMIO_REG_VSX:
1023                 if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_DWORD)
1024                         kvmppc_set_vsr_dword(vcpu, gpr);
1025                 else if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_WORD)
1026                         kvmppc_set_vsr_word(vcpu, gpr);
1027                 else if (vcpu->arch.mmio_vsx_copy_type ==
1028                                 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1029                         kvmppc_set_vsr_dword_dump(vcpu, gpr);
1030                 break;
1031 #endif
1032         default:
1033                 BUG();
1034         }
1035 }
1036
1037 static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1038                                 unsigned int rt, unsigned int bytes,
1039                                 int is_default_endian, int sign_extend)
1040 {
1041         int idx, ret;
1042         bool host_swabbed;
1043
1044         /* Pity C doesn't have a logical XOR operator */
1045         if (kvmppc_need_byteswap(vcpu)) {
1046                 host_swabbed = is_default_endian;
1047         } else {
1048                 host_swabbed = !is_default_endian;
1049         }
1050
1051         if (bytes > sizeof(run->mmio.data)) {
1052                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1053                        run->mmio.len);
1054         }
1055
1056         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1057         run->mmio.len = bytes;
1058         run->mmio.is_write = 0;
1059
1060         vcpu->arch.io_gpr = rt;
1061         vcpu->arch.mmio_host_swabbed = host_swabbed;
1062         vcpu->mmio_needed = 1;
1063         vcpu->mmio_is_write = 0;
1064         vcpu->arch.mmio_sign_extend = sign_extend;
1065
1066         idx = srcu_read_lock(&vcpu->kvm->srcu);
1067
1068         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1069                               bytes, &run->mmio.data);
1070
1071         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1072
1073         if (!ret) {
1074                 kvmppc_complete_mmio_load(vcpu, run);
1075                 vcpu->mmio_needed = 0;
1076                 return EMULATE_DONE;
1077         }
1078
1079         return EMULATE_DO_MMIO;
1080 }
1081
1082 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1083                        unsigned int rt, unsigned int bytes,
1084                        int is_default_endian)
1085 {
1086         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0);
1087 }
1088 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1089
1090 /* Same as above, but sign extends */
1091 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
1092                         unsigned int rt, unsigned int bytes,
1093                         int is_default_endian)
1094 {
1095         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
1096 }
1097
1098 #ifdef CONFIG_VSX
1099 int kvmppc_handle_vsx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1100                         unsigned int rt, unsigned int bytes,
1101                         int is_default_endian, int mmio_sign_extend)
1102 {
1103         enum emulation_result emulated = EMULATE_DONE;
1104
1105         /* Currently, mmio_vsx_copy_nums only allowed to be less than 4 */
1106         if ( (vcpu->arch.mmio_vsx_copy_nums > 4) ||
1107                 (vcpu->arch.mmio_vsx_copy_nums < 0) ) {
1108                 return EMULATE_FAIL;
1109         }
1110
1111         while (vcpu->arch.mmio_vsx_copy_nums) {
1112                 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1113                         is_default_endian, mmio_sign_extend);
1114
1115                 if (emulated != EMULATE_DONE)
1116                         break;
1117
1118                 vcpu->arch.paddr_accessed += run->mmio.len;
1119
1120                 vcpu->arch.mmio_vsx_copy_nums--;
1121                 vcpu->arch.mmio_vsx_offset++;
1122         }
1123         return emulated;
1124 }
1125 #endif /* CONFIG_VSX */
1126
1127 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1128                         u64 val, unsigned int bytes, int is_default_endian)
1129 {
1130         void *data = run->mmio.data;
1131         int idx, ret;
1132         bool host_swabbed;
1133
1134         /* Pity C doesn't have a logical XOR operator */
1135         if (kvmppc_need_byteswap(vcpu)) {
1136                 host_swabbed = is_default_endian;
1137         } else {
1138                 host_swabbed = !is_default_endian;
1139         }
1140
1141         if (bytes > sizeof(run->mmio.data)) {
1142                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1143                        run->mmio.len);
1144         }
1145
1146         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1147         run->mmio.len = bytes;
1148         run->mmio.is_write = 1;
1149         vcpu->mmio_needed = 1;
1150         vcpu->mmio_is_write = 1;
1151
1152         if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1153                 val = dp_to_sp(val);
1154
1155         /* Store the value at the lowest bytes in 'data'. */
1156         if (!host_swabbed) {
1157                 switch (bytes) {
1158                 case 8: *(u64 *)data = val; break;
1159                 case 4: *(u32 *)data = val; break;
1160                 case 2: *(u16 *)data = val; break;
1161                 case 1: *(u8  *)data = val; break;
1162                 }
1163         } else {
1164                 switch (bytes) {
1165                 case 8: *(u64 *)data = swab64(val); break;
1166                 case 4: *(u32 *)data = swab32(val); break;
1167                 case 2: *(u16 *)data = swab16(val); break;
1168                 case 1: *(u8  *)data = val; break;
1169                 }
1170         }
1171
1172         idx = srcu_read_lock(&vcpu->kvm->srcu);
1173
1174         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1175                                bytes, &run->mmio.data);
1176
1177         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1178
1179         if (!ret) {
1180                 vcpu->mmio_needed = 0;
1181                 return EMULATE_DONE;
1182         }
1183
1184         return EMULATE_DO_MMIO;
1185 }
1186 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1187
1188 #ifdef CONFIG_VSX
1189 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1190 {
1191         u32 dword_offset, word_offset;
1192         union kvmppc_one_reg reg;
1193         int vsx_offset = 0;
1194         int copy_type = vcpu->arch.mmio_vsx_copy_type;
1195         int result = 0;
1196
1197         switch (copy_type) {
1198         case KVMPPC_VSX_COPY_DWORD:
1199                 vsx_offset =
1200                         kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1201
1202                 if (vsx_offset == -1) {
1203                         result = -1;
1204                         break;
1205                 }
1206
1207                 if (!vcpu->arch.mmio_vsx_tx_sx_enabled) {
1208                         *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
1209                 } else {
1210                         reg.vval = VCPU_VSX_VR(vcpu, rs);
1211                         *val = reg.vsxval[vsx_offset];
1212                 }
1213                 break;
1214
1215         case KVMPPC_VSX_COPY_WORD:
1216                 vsx_offset =
1217                         kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1218
1219                 if (vsx_offset == -1) {
1220                         result = -1;
1221                         break;
1222                 }
1223
1224                 if (!vcpu->arch.mmio_vsx_tx_sx_enabled) {
1225                         dword_offset = vsx_offset / 2;
1226                         word_offset = vsx_offset % 2;
1227                         reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
1228                         *val = reg.vsx32val[word_offset];
1229                 } else {
1230                         reg.vval = VCPU_VSX_VR(vcpu, rs);
1231                         *val = reg.vsx32val[vsx_offset];
1232                 }
1233                 break;
1234
1235         default:
1236                 result = -1;
1237                 break;
1238         }
1239
1240         return result;
1241 }
1242
1243 int kvmppc_handle_vsx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1244                         int rs, unsigned int bytes, int is_default_endian)
1245 {
1246         u64 val;
1247         enum emulation_result emulated = EMULATE_DONE;
1248
1249         vcpu->arch.io_gpr = rs;
1250
1251         /* Currently, mmio_vsx_copy_nums only allowed to be less than 4 */
1252         if ( (vcpu->arch.mmio_vsx_copy_nums > 4) ||
1253                 (vcpu->arch.mmio_vsx_copy_nums < 0) ) {
1254                 return EMULATE_FAIL;
1255         }
1256
1257         while (vcpu->arch.mmio_vsx_copy_nums) {
1258                 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1259                         return EMULATE_FAIL;
1260
1261                 emulated = kvmppc_handle_store(run, vcpu,
1262                          val, bytes, is_default_endian);
1263
1264                 if (emulated != EMULATE_DONE)
1265                         break;
1266
1267                 vcpu->arch.paddr_accessed += run->mmio.len;
1268
1269                 vcpu->arch.mmio_vsx_copy_nums--;
1270                 vcpu->arch.mmio_vsx_offset++;
1271         }
1272
1273         return emulated;
1274 }
1275
1276 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu,
1277                         struct kvm_run *run)
1278 {
1279         enum emulation_result emulated = EMULATE_FAIL;
1280         int r;
1281
1282         vcpu->arch.paddr_accessed += run->mmio.len;
1283
1284         if (!vcpu->mmio_is_write) {
1285                 emulated = kvmppc_handle_vsx_load(run, vcpu, vcpu->arch.io_gpr,
1286                          run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1287         } else {
1288                 emulated = kvmppc_handle_vsx_store(run, vcpu,
1289                          vcpu->arch.io_gpr, run->mmio.len, 1);
1290         }
1291
1292         switch (emulated) {
1293         case EMULATE_DO_MMIO:
1294                 run->exit_reason = KVM_EXIT_MMIO;
1295                 r = RESUME_HOST;
1296                 break;
1297         case EMULATE_FAIL:
1298                 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1299                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1300                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1301                 r = RESUME_HOST;
1302                 break;
1303         default:
1304                 r = RESUME_GUEST;
1305                 break;
1306         }
1307         return r;
1308 }
1309 #endif /* CONFIG_VSX */
1310
1311 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1312 {
1313         int r = 0;
1314         union kvmppc_one_reg val;
1315         int size;
1316
1317         size = one_reg_size(reg->id);
1318         if (size > sizeof(val))
1319                 return -EINVAL;
1320
1321         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1322         if (r == -EINVAL) {
1323                 r = 0;
1324                 switch (reg->id) {
1325 #ifdef CONFIG_ALTIVEC
1326                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1327                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1328                                 r = -ENXIO;
1329                                 break;
1330                         }
1331                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1332                         break;
1333                 case KVM_REG_PPC_VSCR:
1334                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1335                                 r = -ENXIO;
1336                                 break;
1337                         }
1338                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1339                         break;
1340                 case KVM_REG_PPC_VRSAVE:
1341                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
1342                         break;
1343 #endif /* CONFIG_ALTIVEC */
1344                 default:
1345                         r = -EINVAL;
1346                         break;
1347                 }
1348         }
1349
1350         if (r)
1351                 return r;
1352
1353         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1354                 r = -EFAULT;
1355
1356         return r;
1357 }
1358
1359 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1360 {
1361         int r;
1362         union kvmppc_one_reg val;
1363         int size;
1364
1365         size = one_reg_size(reg->id);
1366         if (size > sizeof(val))
1367                 return -EINVAL;
1368
1369         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1370                 return -EFAULT;
1371
1372         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1373         if (r == -EINVAL) {
1374                 r = 0;
1375                 switch (reg->id) {
1376 #ifdef CONFIG_ALTIVEC
1377                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1378                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1379                                 r = -ENXIO;
1380                                 break;
1381                         }
1382                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1383                         break;
1384                 case KVM_REG_PPC_VSCR:
1385                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1386                                 r = -ENXIO;
1387                                 break;
1388                         }
1389                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1390                         break;
1391                 case KVM_REG_PPC_VRSAVE:
1392                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1393                                 r = -ENXIO;
1394                                 break;
1395                         }
1396                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
1397                         break;
1398 #endif /* CONFIG_ALTIVEC */
1399                 default:
1400                         r = -EINVAL;
1401                         break;
1402                 }
1403         }
1404
1405         return r;
1406 }
1407
1408 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
1409 {
1410         int r;
1411         sigset_t sigsaved;
1412
1413         if (vcpu->mmio_needed) {
1414                 vcpu->mmio_needed = 0;
1415                 if (!vcpu->mmio_is_write)
1416                         kvmppc_complete_mmio_load(vcpu, run);
1417 #ifdef CONFIG_VSX
1418                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1419                         vcpu->arch.mmio_vsx_copy_nums--;
1420                         vcpu->arch.mmio_vsx_offset++;
1421                 }
1422
1423                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1424                         r = kvmppc_emulate_mmio_vsx_loadstore(vcpu, run);
1425                         if (r == RESUME_HOST) {
1426                                 vcpu->mmio_needed = 1;
1427                                 return r;
1428                         }
1429                 }
1430 #endif
1431         } else if (vcpu->arch.osi_needed) {
1432                 u64 *gprs = run->osi.gprs;
1433                 int i;
1434
1435                 for (i = 0; i < 32; i++)
1436                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1437                 vcpu->arch.osi_needed = 0;
1438         } else if (vcpu->arch.hcall_needed) {
1439                 int i;
1440
1441                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1442                 for (i = 0; i < 9; ++i)
1443                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1444                 vcpu->arch.hcall_needed = 0;
1445 #ifdef CONFIG_BOOKE
1446         } else if (vcpu->arch.epr_needed) {
1447                 kvmppc_set_epr(vcpu, run->epr.epr);
1448                 vcpu->arch.epr_needed = 0;
1449 #endif
1450         }
1451
1452         if (vcpu->sigset_active)
1453                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
1454
1455         if (run->immediate_exit)
1456                 r = -EINTR;
1457         else
1458                 r = kvmppc_vcpu_run(run, vcpu);
1459
1460         if (vcpu->sigset_active)
1461                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1462
1463         return r;
1464 }
1465
1466 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1467 {
1468         if (irq->irq == KVM_INTERRUPT_UNSET) {
1469                 kvmppc_core_dequeue_external(vcpu);
1470                 return 0;
1471         }
1472
1473         kvmppc_core_queue_external(vcpu, irq);
1474
1475         kvm_vcpu_kick(vcpu);
1476
1477         return 0;
1478 }
1479
1480 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1481                                      struct kvm_enable_cap *cap)
1482 {
1483         int r;
1484
1485         if (cap->flags)
1486                 return -EINVAL;
1487
1488         switch (cap->cap) {
1489         case KVM_CAP_PPC_OSI:
1490                 r = 0;
1491                 vcpu->arch.osi_enabled = true;
1492                 break;
1493         case KVM_CAP_PPC_PAPR:
1494                 r = 0;
1495                 vcpu->arch.papr_enabled = true;
1496                 break;
1497         case KVM_CAP_PPC_EPR:
1498                 r = 0;
1499                 if (cap->args[0])
1500                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1501                 else
1502                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1503                 break;
1504 #ifdef CONFIG_BOOKE
1505         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1506                 r = 0;
1507                 vcpu->arch.watchdog_enabled = true;
1508                 break;
1509 #endif
1510 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1511         case KVM_CAP_SW_TLB: {
1512                 struct kvm_config_tlb cfg;
1513                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1514
1515                 r = -EFAULT;
1516                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1517                         break;
1518
1519                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1520                 break;
1521         }
1522 #endif
1523 #ifdef CONFIG_KVM_MPIC
1524         case KVM_CAP_IRQ_MPIC: {
1525                 struct fd f;
1526                 struct kvm_device *dev;
1527
1528                 r = -EBADF;
1529                 f = fdget(cap->args[0]);
1530                 if (!f.file)
1531                         break;
1532
1533                 r = -EPERM;
1534                 dev = kvm_device_from_filp(f.file);
1535                 if (dev)
1536                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1537
1538                 fdput(f);
1539                 break;
1540         }
1541 #endif
1542 #ifdef CONFIG_KVM_XICS
1543         case KVM_CAP_IRQ_XICS: {
1544                 struct fd f;
1545                 struct kvm_device *dev;
1546
1547                 r = -EBADF;
1548                 f = fdget(cap->args[0]);
1549                 if (!f.file)
1550                         break;
1551
1552                 r = -EPERM;
1553                 dev = kvm_device_from_filp(f.file);
1554                 if (dev) {
1555                         if (xive_enabled())
1556                                 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1557                         else
1558                                 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1559                 }
1560
1561                 fdput(f);
1562                 break;
1563         }
1564 #endif /* CONFIG_KVM_XICS */
1565 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1566         case KVM_CAP_PPC_FWNMI:
1567                 r = -EINVAL;
1568                 if (!is_kvmppc_hv_enabled(vcpu->kvm))
1569                         break;
1570                 r = 0;
1571                 vcpu->kvm->arch.fwnmi_enabled = true;
1572                 break;
1573 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
1574         default:
1575                 r = -EINVAL;
1576                 break;
1577         }
1578
1579         if (!r)
1580                 r = kvmppc_sanity_check(vcpu);
1581
1582         return r;
1583 }
1584
1585 bool kvm_arch_intc_initialized(struct kvm *kvm)
1586 {
1587 #ifdef CONFIG_KVM_MPIC
1588         if (kvm->arch.mpic)
1589                 return true;
1590 #endif
1591 #ifdef CONFIG_KVM_XICS
1592         if (kvm->arch.xics || kvm->arch.xive)
1593                 return true;
1594 #endif
1595         return false;
1596 }
1597
1598 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1599                                     struct kvm_mp_state *mp_state)
1600 {
1601         return -EINVAL;
1602 }
1603
1604 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1605                                     struct kvm_mp_state *mp_state)
1606 {
1607         return -EINVAL;
1608 }
1609
1610 long kvm_arch_vcpu_ioctl(struct file *filp,
1611                          unsigned int ioctl, unsigned long arg)
1612 {
1613         struct kvm_vcpu *vcpu = filp->private_data;
1614         void __user *argp = (void __user *)arg;
1615         long r;
1616
1617         switch (ioctl) {
1618         case KVM_INTERRUPT: {
1619                 struct kvm_interrupt irq;
1620                 r = -EFAULT;
1621                 if (copy_from_user(&irq, argp, sizeof(irq)))
1622                         goto out;
1623                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1624                 goto out;
1625         }
1626
1627         case KVM_ENABLE_CAP:
1628         {
1629                 struct kvm_enable_cap cap;
1630                 r = -EFAULT;
1631                 if (copy_from_user(&cap, argp, sizeof(cap)))
1632                         goto out;
1633                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1634                 break;
1635         }
1636
1637         case KVM_SET_ONE_REG:
1638         case KVM_GET_ONE_REG:
1639         {
1640                 struct kvm_one_reg reg;
1641                 r = -EFAULT;
1642                 if (copy_from_user(&reg, argp, sizeof(reg)))
1643                         goto out;
1644                 if (ioctl == KVM_SET_ONE_REG)
1645                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1646                 else
1647                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1648                 break;
1649         }
1650
1651 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1652         case KVM_DIRTY_TLB: {
1653                 struct kvm_dirty_tlb dirty;
1654                 r = -EFAULT;
1655                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1656                         goto out;
1657                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1658                 break;
1659         }
1660 #endif
1661         default:
1662                 r = -EINVAL;
1663         }
1664
1665 out:
1666         return r;
1667 }
1668
1669 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1670 {
1671         return VM_FAULT_SIGBUS;
1672 }
1673
1674 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1675 {
1676         u32 inst_nop = 0x60000000;
1677 #ifdef CONFIG_KVM_BOOKE_HV
1678         u32 inst_sc1 = 0x44000022;
1679         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1680         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1681         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1682         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1683 #else
1684         u32 inst_lis = 0x3c000000;
1685         u32 inst_ori = 0x60000000;
1686         u32 inst_sc = 0x44000002;
1687         u32 inst_imm_mask = 0xffff;
1688
1689         /*
1690          * The hypercall to get into KVM from within guest context is as
1691          * follows:
1692          *
1693          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1694          *    ori r0, KVM_SC_MAGIC_R0@l
1695          *    sc
1696          *    nop
1697          */
1698         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1699         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1700         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1701         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1702 #endif
1703
1704         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1705
1706         return 0;
1707 }
1708
1709 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1710                           bool line_status)
1711 {
1712         if (!irqchip_in_kernel(kvm))
1713                 return -ENXIO;
1714
1715         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1716                                         irq_event->irq, irq_event->level,
1717                                         line_status);
1718         return 0;
1719 }
1720
1721
1722 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1723                                    struct kvm_enable_cap *cap)
1724 {
1725         int r;
1726
1727         if (cap->flags)
1728                 return -EINVAL;
1729
1730         switch (cap->cap) {
1731 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1732         case KVM_CAP_PPC_ENABLE_HCALL: {
1733                 unsigned long hcall = cap->args[0];
1734
1735                 r = -EINVAL;
1736                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1737                     cap->args[1] > 1)
1738                         break;
1739                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1740                         break;
1741                 if (cap->args[1])
1742                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1743                 else
1744                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1745                 r = 0;
1746                 break;
1747         }
1748         case KVM_CAP_PPC_SMT: {
1749                 unsigned long mode = cap->args[0];
1750                 unsigned long flags = cap->args[1];
1751
1752                 r = -EINVAL;
1753                 if (kvm->arch.kvm_ops->set_smt_mode)
1754                         r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
1755                 break;
1756         }
1757 #endif
1758         default:
1759                 r = -EINVAL;
1760                 break;
1761         }
1762
1763         return r;
1764 }
1765
1766 long kvm_arch_vm_ioctl(struct file *filp,
1767                        unsigned int ioctl, unsigned long arg)
1768 {
1769         struct kvm *kvm __maybe_unused = filp->private_data;
1770         void __user *argp = (void __user *)arg;
1771         long r;
1772
1773         switch (ioctl) {
1774         case KVM_PPC_GET_PVINFO: {
1775                 struct kvm_ppc_pvinfo pvinfo;
1776                 memset(&pvinfo, 0, sizeof(pvinfo));
1777                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1778                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1779                         r = -EFAULT;
1780                         goto out;
1781                 }
1782
1783                 break;
1784         }
1785         case KVM_ENABLE_CAP:
1786         {
1787                 struct kvm_enable_cap cap;
1788                 r = -EFAULT;
1789                 if (copy_from_user(&cap, argp, sizeof(cap)))
1790                         goto out;
1791                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1792                 break;
1793         }
1794 #ifdef CONFIG_SPAPR_TCE_IOMMU
1795         case KVM_CREATE_SPAPR_TCE_64: {
1796                 struct kvm_create_spapr_tce_64 create_tce_64;
1797
1798                 r = -EFAULT;
1799                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
1800                         goto out;
1801                 if (create_tce_64.flags) {
1802                         r = -EINVAL;
1803                         goto out;
1804                 }
1805                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1806                 goto out;
1807         }
1808         case KVM_CREATE_SPAPR_TCE: {
1809                 struct kvm_create_spapr_tce create_tce;
1810                 struct kvm_create_spapr_tce_64 create_tce_64;
1811
1812                 r = -EFAULT;
1813                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1814                         goto out;
1815
1816                 create_tce_64.liobn = create_tce.liobn;
1817                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
1818                 create_tce_64.offset = 0;
1819                 create_tce_64.size = create_tce.window_size >>
1820                                 IOMMU_PAGE_SHIFT_4K;
1821                 create_tce_64.flags = 0;
1822                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1823                 goto out;
1824         }
1825 #endif
1826 #ifdef CONFIG_PPC_BOOK3S_64
1827         case KVM_PPC_GET_SMMU_INFO: {
1828                 struct kvm_ppc_smmu_info info;
1829                 struct kvm *kvm = filp->private_data;
1830
1831                 memset(&info, 0, sizeof(info));
1832                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1833                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1834                         r = -EFAULT;
1835                 break;
1836         }
1837         case KVM_PPC_RTAS_DEFINE_TOKEN: {
1838                 struct kvm *kvm = filp->private_data;
1839
1840                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1841                 break;
1842         }
1843         case KVM_PPC_CONFIGURE_V3_MMU: {
1844                 struct kvm *kvm = filp->private_data;
1845                 struct kvm_ppc_mmuv3_cfg cfg;
1846
1847                 r = -EINVAL;
1848                 if (!kvm->arch.kvm_ops->configure_mmu)
1849                         goto out;
1850                 r = -EFAULT;
1851                 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1852                         goto out;
1853                 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
1854                 break;
1855         }
1856         case KVM_PPC_GET_RMMU_INFO: {
1857                 struct kvm *kvm = filp->private_data;
1858                 struct kvm_ppc_rmmu_info info;
1859
1860                 r = -EINVAL;
1861                 if (!kvm->arch.kvm_ops->get_rmmu_info)
1862                         goto out;
1863                 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
1864                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1865                         r = -EFAULT;
1866                 break;
1867         }
1868         default: {
1869                 struct kvm *kvm = filp->private_data;
1870                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1871         }
1872 #else /* CONFIG_PPC_BOOK3S_64 */
1873         default:
1874                 r = -ENOTTY;
1875 #endif
1876         }
1877 out:
1878         return r;
1879 }
1880
1881 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1882 static unsigned long nr_lpids;
1883
1884 long kvmppc_alloc_lpid(void)
1885 {
1886         long lpid;
1887
1888         do {
1889                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1890                 if (lpid >= nr_lpids) {
1891                         pr_err("%s: No LPIDs free\n", __func__);
1892                         return -ENOMEM;
1893                 }
1894         } while (test_and_set_bit(lpid, lpid_inuse));
1895
1896         return lpid;
1897 }
1898 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1899
1900 void kvmppc_claim_lpid(long lpid)
1901 {
1902         set_bit(lpid, lpid_inuse);
1903 }
1904 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1905
1906 void kvmppc_free_lpid(long lpid)
1907 {
1908         clear_bit(lpid, lpid_inuse);
1909 }
1910 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1911
1912 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1913 {
1914         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1915         memset(lpid_inuse, 0, sizeof(lpid_inuse));
1916 }
1917 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1918
1919 int kvm_arch_init(void *opaque)
1920 {
1921         return 0;
1922 }
1923
1924 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);