arch/powerpc/kvm/powerpc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *
   4  * Copyright IBM Corp. 2007
   5  *
   6  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
   7  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
   8  */
   9
  10 #include <linux/errno.h>
  11 #include <linux/err.h>
  12 #include <linux/kvm_host.h>
  13 #include <linux/vmalloc.h>
  14 #include <linux/hrtimer.h>
  15 #include <linux/sched/signal.h>
  16 #include <linux/fs.h>
  17 #include <linux/slab.h>
  18 #include <linux/file.h>
  19 #include <linux/module.h>
  20 #include <linux/irqbypass.h>
  21 #include <linux/kvm_irqfd.h>
  22 #include <linux/of.h>
  23 #include <asm/cputable.h>
  24 #include <linux/uaccess.h>
  25 #include <asm/kvm_ppc.h>
  26 #include <asm/cputhreads.h>
  27 #include <asm/irqflags.h>
  28 #include <asm/iommu.h>
  29 #include <asm/switch_to.h>
  30 #include <asm/xive.h>
  31 #ifdef CONFIG_PPC_PSERIES
  32 #include <asm/hvcall.h>
  33 #include <asm/plpar_wrappers.h>
  34 #endif
  35 #include <asm/ultravisor.h>
  36 #include <asm/setup.h>
  37
  38 #include "timing.h"
  39 #include "irq.h"
  40 #include "../mm/mmu_decl.h"
  41
  42 #define CREATE_TRACE_POINTS
  43 #include "trace.h"
  44
  45 struct kvmppc_ops *kvmppc_hv_ops;
  46 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
  47 struct kvmppc_ops *kvmppc_pr_ops;
  48 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
  49
  50
  51 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  52 {
  53         return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
  54 }
  55
  56 bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu)
  57 {
  58         return kvm_arch_vcpu_runnable(vcpu);
  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_halt(vcpu);
 242                 break;
 243         default:
 244                 r = EV_UNIMPLEMENTED;
 245                 break;
 246         }
 247
 248         kvmppc_set_gpr(vcpu, 4, r2);
 249
 250         return r;
 251 }
 252 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
 253
 254 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 255 {
 256         int r = false;
 257
 258         /* We have to know what CPU to virtualize */
 259         if (!vcpu->arch.pvr)
 260                 goto out;
 261
 262         /* PAPR only works with book3s_64 */
 263         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 264                 goto out;
 265
 266         /* HV KVM can only do PAPR mode for now */
 267         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
 268                 goto out;
 269
 270 #ifdef CONFIG_KVM_BOOKE_HV
 271         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 272                 goto out;
 273 #endif
 274
 275         r = true;
 276
 277 out:
 278         vcpu->arch.sane = r;
 279         return r ? 0 : -EINVAL;
 280 }
 281 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
 282
 283 int kvmppc_emulate_mmio(struct kvm_vcpu *vcpu)
 284 {
 285         enum emulation_result er;
 286         int r;
 287
 288         er = kvmppc_emulate_loadstore(vcpu);
 289         switch (er) {
 290         case EMULATE_DONE:
 291                 /* Future optimization: only reload non-volatiles if they were
 292                  * actually modified. */
 293                 r = RESUME_GUEST_NV;
 294                 break;
 295         case EMULATE_AGAIN:
 296                 r = RESUME_GUEST;
 297                 break;
 298         case EMULATE_DO_MMIO:
 299                 vcpu->run->exit_reason = KVM_EXIT_MMIO;
 300                 /* We must reload nonvolatiles because "update" load/store
 301                  * instructions modify register state. */
 302                 /* Future optimization: only reload non-volatiles if they were
 303                  * actually modified. */
 304                 r = RESUME_HOST_NV;
 305                 break;
 306         case EMULATE_FAIL:
 307         {
 308                 u32 last_inst;
 309
 310                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
 311                 kvm_debug_ratelimited("Guest access to device memory using unsupported instruction (opcode: %#08x)\n",
 312                                       last_inst);
 313
 314                 /*
 315                  * Injecting a Data Storage here is a bit more
 316                  * accurate since the instruction that caused the
 317                  * access could still be a valid one.
 318                  */
 319                 if (!IS_ENABLED(CONFIG_BOOKE)) {
 320                         ulong dsisr = DSISR_BADACCESS;
 321
 322                         if (vcpu->mmio_is_write)
 323                                 dsisr |= DSISR_ISSTORE;
 324
 325                         kvmppc_core_queue_data_storage(vcpu, vcpu->arch.vaddr_accessed, dsisr);
 326                 } else {
 327                         /*
 328                          * BookE does not send a SIGBUS on a bad
 329                          * fault, so use a Program interrupt instead
 330                          * to avoid a fault loop.
 331                          */
 332                         kvmppc_core_queue_program(vcpu, 0);
 333                 }
 334
 335                 r = RESUME_GUEST;
 336                 break;
 337         }
 338         default:
 339                 WARN_ON(1);
 340                 r = RESUME_GUEST;
 341         }
 342
 343         return r;
 344 }
 345 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
 346
 347 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 348               bool data)
 349 {
 350         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 351         struct kvmppc_pte pte;
 352         int r = -EINVAL;
 353
 354         vcpu->stat.st++;
 355
 356         if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->store_to_eaddr)
 357                 r = vcpu->kvm->arch.kvm_ops->store_to_eaddr(vcpu, eaddr, ptr,
 358                                                             size);
 359
 360         if ((!r) || (r == -EAGAIN))
 361                 return r;
 362
 363         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 364                          XLATE_WRITE, &pte);
 365         if (r < 0)
 366                 return r;
 367
 368         *eaddr = pte.raddr;
 369
 370         if (!pte.may_write)
 371                 return -EPERM;
 372
 373         /* Magic page override */
 374         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 375             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 376             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 377                 void *magic = vcpu->arch.shared;
 378                 magic += pte.eaddr & 0xfff;
 379                 memcpy(magic, ptr, size);
 380                 return EMULATE_DONE;
 381         }
 382
 383         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 384                 return EMULATE_DO_MMIO;
 385
 386         return EMULATE_DONE;
 387 }
 388 EXPORT_SYMBOL_GPL(kvmppc_st);
 389
 390 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 391                       bool data)
 392 {
 393         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 394         struct kvmppc_pte pte;
 395         int rc = -EINVAL;
 396
 397         vcpu->stat.ld++;
 398
 399         if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->load_from_eaddr)
 400                 rc = vcpu->kvm->arch.kvm_ops->load_from_eaddr(vcpu, eaddr, ptr,
 401                                                               size);
 402
 403         if ((!rc) || (rc == -EAGAIN))
 404                 return rc;
 405
 406         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 407                           XLATE_READ, &pte);
 408         if (rc)
 409                 return rc;
 410
 411         *eaddr = pte.raddr;
 412
 413         if (!pte.may_read)
 414                 return -EPERM;
 415
 416         if (!data && !pte.may_execute)
 417                 return -ENOEXEC;
 418
 419         /* Magic page override */
 420         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 421             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 422             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 423                 void *magic = vcpu->arch.shared;
 424                 magic += pte.eaddr & 0xfff;
 425                 memcpy(ptr, magic, size);
 426                 return EMULATE_DONE;
 427         }
 428
 429         kvm_vcpu_srcu_read_lock(vcpu);
 430         rc = kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size);
 431         kvm_vcpu_srcu_read_unlock(vcpu);
 432         if (rc)
 433                 return EMULATE_DO_MMIO;
 434
 435         return EMULATE_DONE;
 436 }
 437 EXPORT_SYMBOL_GPL(kvmppc_ld);
 438
 439 int kvm_arch_hardware_enable(void)
 440 {
 441         return 0;
 442 }
 443
 444 int kvm_arch_hardware_setup(void *opaque)
 445 {
 446         return 0;
 447 }
 448
 449 int kvm_arch_check_processor_compat(void *opaque)
 450 {
 451         return kvmppc_core_check_processor_compat();
 452 }
 453
 454 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 455 {
 456         struct kvmppc_ops *kvm_ops = NULL;
 457         int r;
 458
 459         /*
 460          * if we have both HV and PR enabled, default is HV
 461          */
 462         if (type == 0) {
 463                 if (kvmppc_hv_ops)
 464                         kvm_ops = kvmppc_hv_ops;
 465                 else
 466                         kvm_ops = kvmppc_pr_ops;
 467                 if (!kvm_ops)
 468                         goto err_out;
 469         } else  if (type == KVM_VM_PPC_HV) {
 470                 if (!kvmppc_hv_ops)
 471                         goto err_out;
 472                 kvm_ops = kvmppc_hv_ops;
 473         } else if (type == KVM_VM_PPC_PR) {
 474                 if (!kvmppc_pr_ops)
 475                         goto err_out;
 476                 kvm_ops = kvmppc_pr_ops;
 477         } else
 478                 goto err_out;
 479
 480         if (!try_module_get(kvm_ops->owner))
 481                 return -ENOENT;
 482
 483         kvm->arch.kvm_ops = kvm_ops;
 484         r = kvmppc_core_init_vm(kvm);
 485         if (r)
 486                 module_put(kvm_ops->owner);
 487         return r;
 488 err_out:
 489         return -EINVAL;
 490 }
 491
 492 void kvm_arch_destroy_vm(struct kvm *kvm)
 493 {
 494 #ifdef CONFIG_KVM_XICS
 495         /*
 496          * We call kick_all_cpus_sync() to ensure that all
 497          * CPUs have executed any pending IPIs before we
 498          * continue and free VCPUs structures below.
 499          */
 500         if (is_kvmppc_hv_enabled(kvm))
 501                 kick_all_cpus_sync();
 502 #endif
 503
 504         kvm_destroy_vcpus(kvm);
 505
 506         mutex_lock(&kvm->lock);
 507
 508         kvmppc_core_destroy_vm(kvm);
 509
 510         mutex_unlock(&kvm->lock);
 511
 512         /* drop the module reference */
 513         module_put(kvm->arch.kvm_ops->owner);
 514 }
 515
 516 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 517 {
 518         int r;
 519         /* Assume we're using HV mode when the HV module is loaded */
 520         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 521
 522         if (kvm) {
 523                 /*
 524                  * Hooray - we know which VM type we're running on. Depend on
 525                  * that rather than the guess above.
 526                  */
 527                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 528         }
 529
 530         switch (ext) {
 531 #ifdef CONFIG_BOOKE
 532         case KVM_CAP_PPC_BOOKE_SREGS:
 533         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 534         case KVM_CAP_PPC_EPR:
 535 #else
 536         case KVM_CAP_PPC_SEGSTATE:
 537         case KVM_CAP_PPC_HIOR:
 538         case KVM_CAP_PPC_PAPR:
 539 #endif
 540         case KVM_CAP_PPC_UNSET_IRQ:
 541         case KVM_CAP_PPC_IRQ_LEVEL:
 542         case KVM_CAP_ENABLE_CAP:
 543         case KVM_CAP_ONE_REG:
 544         case KVM_CAP_IOEVENTFD:
 545         case KVM_CAP_DEVICE_CTRL:
 546         case KVM_CAP_IMMEDIATE_EXIT:
 547         case KVM_CAP_SET_GUEST_DEBUG:
 548                 r = 1;
 549                 break;
 550         case KVM_CAP_PPC_GUEST_DEBUG_SSTEP:
 551         case KVM_CAP_PPC_PAIRED_SINGLES:
 552         case KVM_CAP_PPC_OSI:
 553         case KVM_CAP_PPC_GET_PVINFO:
 554 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 555         case KVM_CAP_SW_TLB:
 556 #endif
 557                 /* We support this only for PR */
 558                 r = !hv_enabled;
 559                 break;
 560 #ifdef CONFIG_KVM_MPIC
 561         case KVM_CAP_IRQ_MPIC:
 562                 r = 1;
 563                 break;
 564 #endif
 565
 566 #ifdef CONFIG_PPC_BOOK3S_64
 567         case KVM_CAP_SPAPR_TCE:
 568         case KVM_CAP_SPAPR_TCE_64:
 569                 r = 1;
 570                 break;
 571         case KVM_CAP_SPAPR_TCE_VFIO:
 572                 r = !!cpu_has_feature(CPU_FTR_HVMODE);
 573                 break;
 574         case KVM_CAP_PPC_RTAS:
 575         case KVM_CAP_PPC_FIXUP_HCALL:
 576         case KVM_CAP_PPC_ENABLE_HCALL:
 577 #ifdef CONFIG_KVM_XICS
 578         case KVM_CAP_IRQ_XICS:
 579 #endif
 580         case KVM_CAP_PPC_GET_CPU_CHAR:
 581                 r = 1;
 582                 break;
 583 #ifdef CONFIG_KVM_XIVE
 584         case KVM_CAP_PPC_IRQ_XIVE:
 585                 /*
 586                  * We need XIVE to be enabled on the platform (implies
 587                  * a POWER9 processor) and the PowerNV platform, as
 588                  * nested is not yet supported.
 589                  */
 590                 r = xive_enabled() && !!cpu_has_feature(CPU_FTR_HVMODE) &&
 591                         kvmppc_xive_native_supported();
 592                 break;
 593 #endif
 594
 595         case KVM_CAP_PPC_ALLOC_HTAB:
 596                 r = hv_enabled;
 597                 break;
 598 #endif /* CONFIG_PPC_BOOK3S_64 */
 599 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 600         case KVM_CAP_PPC_SMT:
 601                 r = 0;
 602                 if (kvm) {
 603                         if (kvm->arch.emul_smt_mode > 1)
 604                                 r = kvm->arch.emul_smt_mode;
 605                         else
 606                                 r = kvm->arch.smt_mode;
 607                 } else if (hv_enabled) {
 608                         if (cpu_has_feature(CPU_FTR_ARCH_300))
 609                                 r = 1;
 610                         else
 611                                 r = threads_per_subcore;
 612                 }
 613                 break;
 614         case KVM_CAP_PPC_SMT_POSSIBLE:
 615                 r = 1;
 616                 if (hv_enabled) {
 617                         if (!cpu_has_feature(CPU_FTR_ARCH_300))
 618                                 r = ((threads_per_subcore << 1) - 1);
 619                         else
 620                                 /* P9 can emulate dbells, so allow any mode */
 621                                 r = 8 | 4 | 2 | 1;
 622                 }
 623                 break;
 624         case KVM_CAP_PPC_RMA:
 625                 r = 0;
 626                 break;
 627         case KVM_CAP_PPC_HWRNG:
 628                 r = kvmppc_hwrng_present();
 629                 break;
 630         case KVM_CAP_PPC_MMU_RADIX:
 631                 r = !!(hv_enabled && radix_enabled());
 632                 break;
 633         case KVM_CAP_PPC_MMU_HASH_V3:
 634                 r = !!(hv_enabled && kvmppc_hv_ops->hash_v3_possible &&
 635                        kvmppc_hv_ops->hash_v3_possible());
 636                 break;
 637         case KVM_CAP_PPC_NESTED_HV:
 638                 r = !!(hv_enabled && kvmppc_hv_ops->enable_nested &&
 639                        !kvmppc_hv_ops->enable_nested(NULL));
 640                 break;
 641 #endif
 642         case KVM_CAP_SYNC_MMU:
 643 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 644                 r = hv_enabled;
 645 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 646                 r = 1;
 647 #else
 648                 r = 0;
 649 #endif
 650                 break;
 651 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 652         case KVM_CAP_PPC_HTAB_FD:
 653                 r = hv_enabled;
 654                 break;
 655 #endif
 656         case KVM_CAP_NR_VCPUS:
 657                 /*
 658                  * Recommending a number of CPUs is somewhat arbitrary; we
 659                  * return the number of present CPUs for -HV (since a host
 660                  * will have secondary threads "offline"), and for other KVM
 661                  * implementations just count online CPUs.
 662                  */
 663                 if (hv_enabled)
 664                         r = min_t(unsigned int, num_present_cpus(), KVM_MAX_VCPUS);
 665                 else
 666                         r = min_t(unsigned int, num_online_cpus(), KVM_MAX_VCPUS);
 667                 break;
 668         case KVM_CAP_MAX_VCPUS:
 669                 r = KVM_MAX_VCPUS;
 670                 break;
 671         case KVM_CAP_MAX_VCPU_ID:
 672                 r = KVM_MAX_VCPU_IDS;
 673                 break;
 674 #ifdef CONFIG_PPC_BOOK3S_64
 675         case KVM_CAP_PPC_GET_SMMU_INFO:
 676                 r = 1;
 677                 break;
 678         case KVM_CAP_SPAPR_MULTITCE:
 679                 r = 1;
 680                 break;
 681         case KVM_CAP_SPAPR_RESIZE_HPT:
 682                 r = !!hv_enabled;
 683                 break;
 684 #endif
 685 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 686         case KVM_CAP_PPC_FWNMI:
 687                 r = hv_enabled;
 688                 break;
 689 #endif
 690 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 691         case KVM_CAP_PPC_HTM:
 692                 r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
 693                      (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
 694                 break;
 695 #endif
 696 #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
 697         case KVM_CAP_PPC_SECURE_GUEST:
 698                 r = hv_enabled && kvmppc_hv_ops->enable_svm &&
 699                         !kvmppc_hv_ops->enable_svm(NULL);
 700                 break;
 701         case KVM_CAP_PPC_DAWR1:
 702                 r = !!(hv_enabled && kvmppc_hv_ops->enable_dawr1 &&
 703                        !kvmppc_hv_ops->enable_dawr1(NULL));
 704                 break;
 705         case KVM_CAP_PPC_RPT_INVALIDATE:
 706                 r = 1;
 707                 break;
 708 #endif
 709         case KVM_CAP_PPC_AIL_MODE_3:
 710                 r = 0;
 711                 /*
 712                  * KVM PR, POWER7, and some POWER9s don't support AIL=3 mode.
 713                  * The POWER9s can support it if the guest runs in hash mode,
 714                  * but QEMU doesn't necessarily query the capability in time.
 715                  */
 716                 if (hv_enabled) {
 717                         if (kvmhv_on_pseries()) {
 718                                 if (pseries_reloc_on_exception())
 719                                         r = 1;
 720                         } else if (cpu_has_feature(CPU_FTR_ARCH_207S) &&
 721                                   !cpu_has_feature(CPU_FTR_P9_RADIX_PREFETCH_BUG)) {
 722                                 r = 1;
 723                         }
 724                 }
 725                 break;
 726         default:
 727                 r = 0;
 728                 break;
 729         }
 730         return r;
 731
 732 }
 733
 734 long kvm_arch_dev_ioctl(struct file *filp,
 735                         unsigned int ioctl, unsigned long arg)
 736 {
 737         return -EINVAL;
 738 }
 739
 740 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
 741 {
 742         kvmppc_core_free_memslot(kvm, slot);
 743 }
 744
 745 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 746                                    const struct kvm_memory_slot *old,
 747                                    struct kvm_memory_slot *new,
 748                                    enum kvm_mr_change change)
 749 {
 750         return kvmppc_core_prepare_memory_region(kvm, old, new, change);
 751 }
 752
 753 void kvm_arch_commit_memory_region(struct kvm *kvm,
 754                                    struct kvm_memory_slot *old,
 755                                    const struct kvm_memory_slot *new,
 756                                    enum kvm_mr_change change)
 757 {
 758         kvmppc_core_commit_memory_region(kvm, old, new, change);
 759 }
 760
 761 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 762                                    struct kvm_memory_slot *slot)
 763 {
 764         kvmppc_core_flush_memslot(kvm, slot);
 765 }
 766
 767 int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
 768 {
 769         return 0;
 770 }
 771
 772 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 773 {
 774         struct kvm_vcpu *vcpu;
 775
 776         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 777         kvmppc_decrementer_func(vcpu);
 778
 779         return HRTIMER_NORESTART;
 780 }
 781
 782 int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 783 {
 784         int err;
 785
 786         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 787         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 788
 789 #ifdef CONFIG_KVM_EXIT_TIMING
 790         mutex_init(&vcpu->arch.exit_timing_lock);
 791 #endif
 792         err = kvmppc_subarch_vcpu_init(vcpu);
 793         if (err)
 794                 return err;
 795
 796         err = kvmppc_core_vcpu_create(vcpu);
 797         if (err)
 798                 goto out_vcpu_uninit;
 799
 800         rcuwait_init(&vcpu->arch.wait);
 801         vcpu->arch.waitp = &vcpu->arch.wait;
 802         return 0;
 803
 804 out_vcpu_uninit:
 805         kvmppc_subarch_vcpu_uninit(vcpu);
 806         return err;
 807 }
 808
 809 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 810 {
 811 }
 812
 813 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 814 {
 815         /* Make sure we're not using the vcpu anymore */
 816         hrtimer_cancel(&vcpu->arch.dec_timer);
 817
 818         switch (vcpu->arch.irq_type) {
 819         case KVMPPC_IRQ_MPIC:
 820                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 821                 break;
 822         case KVMPPC_IRQ_XICS:
 823                 if (xics_on_xive())
 824                         kvmppc_xive_cleanup_vcpu(vcpu);
 825                 else
 826                         kvmppc_xics_free_icp(vcpu);
 827                 break;
 828         case KVMPPC_IRQ_XIVE:
 829                 kvmppc_xive_native_cleanup_vcpu(vcpu);
 830                 break;
 831         }
 832
 833         kvmppc_core_vcpu_free(vcpu);
 834
 835         kvmppc_subarch_vcpu_uninit(vcpu);
 836 }
 837
 838 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 839 {
 840         return kvmppc_core_pending_dec(vcpu);
 841 }
 842
 843 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 844 {
 845 #ifdef CONFIG_BOOKE
 846         /*
 847          * vrsave (formerly usprg0) isn't used by Linux, but may
 848          * be used by the guest.
 849          *
 850          * On non-booke this is associated with Altivec and
 851          * is handled by code in book3s.c.
 852          */
 853         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 854 #endif
 855         kvmppc_core_vcpu_load(vcpu, cpu);
 856 }
 857
 858 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 859 {
 860         kvmppc_core_vcpu_put(vcpu);
 861 #ifdef CONFIG_BOOKE
 862         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 863 #endif
 864 }
 865
 866 /*
 867  * irq_bypass_add_producer and irq_bypass_del_producer are only
 868  * useful if the architecture supports PCI passthrough.
 869  * irq_bypass_stop and irq_bypass_start are not needed and so
 870  * kvm_ops are not defined for them.
 871  */
 872 bool kvm_arch_has_irq_bypass(void)
 873 {
 874         return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
 875                 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
 876 }
 877
 878 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
 879                                      struct irq_bypass_producer *prod)
 880 {
 881         struct kvm_kernel_irqfd *irqfd =
 882                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 883         struct kvm *kvm = irqfd->kvm;
 884
 885         if (kvm->arch.kvm_ops->irq_bypass_add_producer)
 886                 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
 887
 888         return 0;
 889 }
 890
 891 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
 892                                       struct irq_bypass_producer *prod)
 893 {
 894         struct kvm_kernel_irqfd *irqfd =
 895                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 896         struct kvm *kvm = irqfd->kvm;
 897
 898         if (kvm->arch.kvm_ops->irq_bypass_del_producer)
 899                 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
 900 }
 901
 902 #ifdef CONFIG_VSX
 903 static inline int kvmppc_get_vsr_dword_offset(int index)
 904 {
 905         int offset;
 906
 907         if ((index != 0) && (index != 1))
 908                 return -1;
 909
 910 #ifdef __BIG_ENDIAN
 911         offset =  index;
 912 #else
 913         offset = 1 - index;
 914 #endif
 915
 916         return offset;
 917 }
 918
 919 static inline int kvmppc_get_vsr_word_offset(int index)
 920 {
 921         int offset;
 922
 923         if ((index > 3) || (index < 0))
 924                 return -1;
 925
 926 #ifdef __BIG_ENDIAN
 927         offset = index;
 928 #else
 929         offset = 3 - index;
 930 #endif
 931         return offset;
 932 }
 933
 934 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
 935         u64 gpr)
 936 {
 937         union kvmppc_one_reg val;
 938         int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
 939         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 940
 941         if (offset == -1)
 942                 return;
 943
 944         if (index >= 32) {
 945                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 946                 val.vsxval[offset] = gpr;
 947                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 948         } else {
 949                 VCPU_VSX_FPR(vcpu, index, offset) = gpr;
 950         }
 951 }
 952
 953 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
 954         u64 gpr)
 955 {
 956         union kvmppc_one_reg val;
 957         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 958
 959         if (index >= 32) {
 960                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 961                 val.vsxval[0] = gpr;
 962                 val.vsxval[1] = gpr;
 963                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 964         } else {
 965                 VCPU_VSX_FPR(vcpu, index, 0) = gpr;
 966                 VCPU_VSX_FPR(vcpu, index, 1) = gpr;
 967         }
 968 }
 969
 970 static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
 971         u32 gpr)
 972 {
 973         union kvmppc_one_reg val;
 974         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 975
 976         if (index >= 32) {
 977                 val.vsx32val[0] = gpr;
 978                 val.vsx32val[1] = gpr;
 979                 val.vsx32val[2] = gpr;
 980                 val.vsx32val[3] = gpr;
 981                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 982         } else {
 983                 val.vsx32val[0] = gpr;
 984                 val.vsx32val[1] = gpr;
 985                 VCPU_VSX_FPR(vcpu, index, 0) = val.vsxval[0];
 986                 VCPU_VSX_FPR(vcpu, index, 1) = val.vsxval[0];
 987         }
 988 }
 989
 990 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
 991         u32 gpr32)
 992 {
 993         union kvmppc_one_reg val;
 994         int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
 995         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 996         int dword_offset, word_offset;
 997
 998         if (offset == -1)
 999                 return;
1000
1001         if (index >= 32) {
1002                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
1003                 val.vsx32val[offset] = gpr32;
1004                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
1005         } else {
1006                 dword_offset = offset / 2;
1007                 word_offset = offset % 2;
1008                 val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
1009                 val.vsx32val[word_offset] = gpr32;
1010                 VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
1011         }
1012 }
1013 #endif /* CONFIG_VSX */
1014
1015 #ifdef CONFIG_ALTIVEC
1016 static inline int kvmppc_get_vmx_offset_generic(struct kvm_vcpu *vcpu,
1017                 int index, int element_size)
1018 {
1019         int offset;
1020         int elts = sizeof(vector128)/element_size;
1021
1022         if ((index < 0) || (index >= elts))
1023                 return -1;
1024
1025         if (kvmppc_need_byteswap(vcpu))
1026                 offset = elts - index - 1;
1027         else
1028                 offset = index;
1029
1030         return offset;
1031 }
1032
1033 static inline int kvmppc_get_vmx_dword_offset(struct kvm_vcpu *vcpu,
1034                 int index)
1035 {
1036         return kvmppc_get_vmx_offset_generic(vcpu, index, 8);
1037 }
1038
1039 static inline int kvmppc_get_vmx_word_offset(struct kvm_vcpu *vcpu,
1040                 int index)
1041 {
1042         return kvmppc_get_vmx_offset_generic(vcpu, index, 4);
1043 }
1044
1045 static inline int kvmppc_get_vmx_hword_offset(struct kvm_vcpu *vcpu,
1046                 int index)
1047 {
1048         return kvmppc_get_vmx_offset_generic(vcpu, index, 2);
1049 }
1050
1051 static inline int kvmppc_get_vmx_byte_offset(struct kvm_vcpu *vcpu,
1052                 int index)
1053 {
1054         return kvmppc_get_vmx_offset_generic(vcpu, index, 1);
1055 }
1056
1057
1058 static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
1059         u64 gpr)
1060 {
1061         union kvmppc_one_reg val;
1062         int offset = kvmppc_get_vmx_dword_offset(vcpu,
1063                         vcpu->arch.mmio_vmx_offset);
1064         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1065
1066         if (offset == -1)
1067                 return;
1068
1069         val.vval = VCPU_VSX_VR(vcpu, index);
1070         val.vsxval[offset] = gpr;
1071         VCPU_VSX_VR(vcpu, index) = val.vval;
1072 }
1073
1074 static inline void kvmppc_set_vmx_word(struct kvm_vcpu *vcpu,
1075         u32 gpr32)
1076 {
1077         union kvmppc_one_reg val;
1078         int offset = kvmppc_get_vmx_word_offset(vcpu,
1079                         vcpu->arch.mmio_vmx_offset);
1080         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1081
1082         if (offset == -1)
1083                 return;
1084
1085         val.vval = VCPU_VSX_VR(vcpu, index);
1086         val.vsx32val[offset] = gpr32;
1087         VCPU_VSX_VR(vcpu, index) = val.vval;
1088 }
1089
1090 static inline void kvmppc_set_vmx_hword(struct kvm_vcpu *vcpu,
1091         u16 gpr16)
1092 {
1093         union kvmppc_one_reg val;
1094         int offset = kvmppc_get_vmx_hword_offset(vcpu,
1095                         vcpu->arch.mmio_vmx_offset);
1096         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1097
1098         if (offset == -1)
1099                 return;
1100
1101         val.vval = VCPU_VSX_VR(vcpu, index);
1102         val.vsx16val[offset] = gpr16;
1103         VCPU_VSX_VR(vcpu, index) = val.vval;
1104 }
1105
1106 static inline void kvmppc_set_vmx_byte(struct kvm_vcpu *vcpu,
1107         u8 gpr8)
1108 {
1109         union kvmppc_one_reg val;
1110         int offset = kvmppc_get_vmx_byte_offset(vcpu,
1111                         vcpu->arch.mmio_vmx_offset);
1112         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1113
1114         if (offset == -1)
1115                 return;
1116
1117         val.vval = VCPU_VSX_VR(vcpu, index);
1118         val.vsx8val[offset] = gpr8;
1119         VCPU_VSX_VR(vcpu, index) = val.vval;
1120 }
1121 #endif /* CONFIG_ALTIVEC */
1122
1123 #ifdef CONFIG_PPC_FPU
1124 static inline u64 sp_to_dp(u32 fprs)
1125 {
1126         u64 fprd;
1127
1128         preempt_disable();
1129         enable_kernel_fp();
1130         asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m<>" (fprd) : "m<>" (fprs)
1131              : "fr0");
1132         preempt_enable();
1133         return fprd;
1134 }
1135
1136 static inline u32 dp_to_sp(u64 fprd)
1137 {
1138         u32 fprs;
1139
1140         preempt_disable();
1141         enable_kernel_fp();
1142         asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m<>" (fprs) : "m<>" (fprd)
1143              : "fr0");
1144         preempt_enable();
1145         return fprs;
1146 }
1147
1148 #else
1149 #define sp_to_dp(x)     (x)
1150 #define dp_to_sp(x)     (x)
1151 #endif /* CONFIG_PPC_FPU */
1152
1153 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu)
1154 {
1155         struct kvm_run *run = vcpu->run;
1156         u64 gpr;
1157
1158         if (run->mmio.len > sizeof(gpr))
1159                 return;
1160
1161         if (!vcpu->arch.mmio_host_swabbed) {
1162                 switch (run->mmio.len) {
1163                 case 8: gpr = *(u64 *)run->mmio.data; break;
1164                 case 4: gpr = *(u32 *)run->mmio.data; break;
1165                 case 2: gpr = *(u16 *)run->mmio.data; break;
1166                 case 1: gpr = *(u8 *)run->mmio.data; break;
1167                 }
1168         } else {
1169                 switch (run->mmio.len) {
1170                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
1171                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
1172                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
1173                 case 1: gpr = *(u8 *)run->mmio.data; break;
1174                 }
1175         }
1176
1177         /* conversion between single and double precision */
1178         if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
1179                 gpr = sp_to_dp(gpr);
1180
1181         if (vcpu->arch.mmio_sign_extend) {
1182                 switch (run->mmio.len) {
1183 #ifdef CONFIG_PPC64
1184                 case 4:
1185                         gpr = (s64)(s32)gpr;
1186                         break;
1187 #endif
1188                 case 2:
1189                         gpr = (s64)(s16)gpr;
1190                         break;
1191                 case 1:
1192                         gpr = (s64)(s8)gpr;
1193                         break;
1194                 }
1195         }
1196
1197         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1198         case KVM_MMIO_REG_GPR:
1199                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1200                 break;
1201         case KVM_MMIO_REG_FPR:
1202                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1203                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);
1204
1205                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1206                 break;
1207 #ifdef CONFIG_PPC_BOOK3S
1208         case KVM_MMIO_REG_QPR:
1209                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1210                 break;
1211         case KVM_MMIO_REG_FQPR:
1212                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1213                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1214                 break;
1215 #endif
1216 #ifdef CONFIG_VSX
1217         case KVM_MMIO_REG_VSX:
1218                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1219                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);
1220
1221                 if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
1222                         kvmppc_set_vsr_dword(vcpu, gpr);
1223                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
1224                         kvmppc_set_vsr_word(vcpu, gpr);
1225                 else if (vcpu->arch.mmio_copy_type ==
1226                                 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1227                         kvmppc_set_vsr_dword_dump(vcpu, gpr);
1228                 else if (vcpu->arch.mmio_copy_type ==
1229                                 KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
1230                         kvmppc_set_vsr_word_dump(vcpu, gpr);
1231                 break;
1232 #endif
1233 #ifdef CONFIG_ALTIVEC
1234         case KVM_MMIO_REG_VMX:
1235                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1236                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);
1237
1238                 if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_DWORD)
1239                         kvmppc_set_vmx_dword(vcpu, gpr);
1240                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_WORD)
1241                         kvmppc_set_vmx_word(vcpu, gpr);
1242                 else if (vcpu->arch.mmio_copy_type ==
1243                                 KVMPPC_VMX_COPY_HWORD)
1244                         kvmppc_set_vmx_hword(vcpu, gpr);
1245                 else if (vcpu->arch.mmio_copy_type ==
1246                                 KVMPPC_VMX_COPY_BYTE)
1247                         kvmppc_set_vmx_byte(vcpu, gpr);
1248                 break;
1249 #endif
1250 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1251         case KVM_MMIO_REG_NESTED_GPR:
1252                 if (kvmppc_need_byteswap(vcpu))
1253                         gpr = swab64(gpr);
1254                 kvm_vcpu_write_guest(vcpu, vcpu->arch.nested_io_gpr, &gpr,
1255                                      sizeof(gpr));
1256                 break;
1257 #endif
1258         default:
1259                 BUG();
1260         }
1261 }
1262
1263 static int __kvmppc_handle_load(struct kvm_vcpu *vcpu,
1264                                 unsigned int rt, unsigned int bytes,
1265                                 int is_default_endian, int sign_extend)
1266 {
1267         struct kvm_run *run = vcpu->run;
1268         int idx, ret;
1269         bool host_swabbed;
1270
1271         /* Pity C doesn't have a logical XOR operator */
1272         if (kvmppc_need_byteswap(vcpu)) {
1273                 host_swabbed = is_default_endian;
1274         } else {
1275                 host_swabbed = !is_default_endian;
1276         }
1277
1278         if (bytes > sizeof(run->mmio.data))
1279                 return EMULATE_FAIL;
1280
1281         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1282         run->mmio.len = bytes;
1283         run->mmio.is_write = 0;
1284
1285         vcpu->arch.io_gpr = rt;
1286         vcpu->arch.mmio_host_swabbed = host_swabbed;
1287         vcpu->mmio_needed = 1;
1288         vcpu->mmio_is_write = 0;
1289         vcpu->arch.mmio_sign_extend = sign_extend;
1290
1291         idx = srcu_read_lock(&vcpu->kvm->srcu);
1292
1293         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1294                               bytes, &run->mmio.data);
1295
1296         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1297
1298         if (!ret) {
1299                 kvmppc_complete_mmio_load(vcpu);
1300                 vcpu->mmio_needed = 0;
1301                 return EMULATE_DONE;
1302         }
1303
1304         return EMULATE_DO_MMIO;
1305 }
1306
1307 int kvmppc_handle_load(struct kvm_vcpu *vcpu,
1308                        unsigned int rt, unsigned int bytes,
1309                        int is_default_endian)
1310 {
1311         return __kvmppc_handle_load(vcpu, rt, bytes, is_default_endian, 0);
1312 }
1313 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1314
1315 /* Same as above, but sign extends */
1316 int kvmppc_handle_loads(struct kvm_vcpu *vcpu,
1317                         unsigned int rt, unsigned int bytes,
1318                         int is_default_endian)
1319 {
1320         return __kvmppc_handle_load(vcpu, rt, bytes, is_default_endian, 1);
1321 }
1322
1323 #ifdef CONFIG_VSX
1324 int kvmppc_handle_vsx_load(struct kvm_vcpu *vcpu,
1325                         unsigned int rt, unsigned int bytes,
1326                         int is_default_endian, int mmio_sign_extend)
1327 {
1328         enum emulation_result emulated = EMULATE_DONE;
1329
1330         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1331         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1332                 return EMULATE_FAIL;
1333
1334         while (vcpu->arch.mmio_vsx_copy_nums) {
1335                 emulated = __kvmppc_handle_load(vcpu, rt, bytes,
1336                         is_default_endian, mmio_sign_extend);
1337
1338                 if (emulated != EMULATE_DONE)
1339                         break;
1340
1341                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1342
1343                 vcpu->arch.mmio_vsx_copy_nums--;
1344                 vcpu->arch.mmio_vsx_offset++;
1345         }
1346         return emulated;
1347 }
1348 #endif /* CONFIG_VSX */
1349
1350 int kvmppc_handle_store(struct kvm_vcpu *vcpu,
1351                         u64 val, unsigned int bytes, int is_default_endian)
1352 {
1353         struct kvm_run *run = vcpu->run;
1354         void *data = run->mmio.data;
1355         int idx, ret;
1356         bool host_swabbed;
1357
1358         /* Pity C doesn't have a logical XOR operator */
1359         if (kvmppc_need_byteswap(vcpu)) {
1360                 host_swabbed = is_default_endian;
1361         } else {
1362                 host_swabbed = !is_default_endian;
1363         }
1364
1365         if (bytes > sizeof(run->mmio.data))
1366                 return EMULATE_FAIL;
1367
1368         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1369         run->mmio.len = bytes;
1370         run->mmio.is_write = 1;
1371         vcpu->mmio_needed = 1;
1372         vcpu->mmio_is_write = 1;
1373
1374         if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1375                 val = dp_to_sp(val);
1376
1377         /* Store the value at the lowest bytes in 'data'. */
1378         if (!host_swabbed) {
1379                 switch (bytes) {
1380                 case 8: *(u64 *)data = val; break;
1381                 case 4: *(u32 *)data = val; break;
1382                 case 2: *(u16 *)data = val; break;
1383                 case 1: *(u8  *)data = val; break;
1384                 }
1385         } else {
1386                 switch (bytes) {
1387                 case 8: *(u64 *)data = swab64(val); break;
1388                 case 4: *(u32 *)data = swab32(val); break;
1389                 case 2: *(u16 *)data = swab16(val); break;
1390                 case 1: *(u8  *)data = val; break;
1391                 }
1392         }
1393
1394         idx = srcu_read_lock(&vcpu->kvm->srcu);
1395
1396         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1397                                bytes, &run->mmio.data);
1398
1399         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1400
1401         if (!ret) {
1402                 vcpu->mmio_needed = 0;
1403                 return EMULATE_DONE;
1404         }
1405
1406         return EMULATE_DO_MMIO;
1407 }
1408 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1409
1410 #ifdef CONFIG_VSX
1411 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1412 {
1413         u32 dword_offset, word_offset;
1414         union kvmppc_one_reg reg;
1415         int vsx_offset = 0;
1416         int copy_type = vcpu->arch.mmio_copy_type;
1417         int result = 0;
1418
1419         switch (copy_type) {
1420         case KVMPPC_VSX_COPY_DWORD:
1421                 vsx_offset =
1422                         kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1423
1424                 if (vsx_offset == -1) {
1425                         result = -1;
1426                         break;
1427                 }
1428
1429                 if (rs < 32) {
1430                         *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
1431                 } else {
1432                         reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1433                         *val = reg.vsxval[vsx_offset];
1434                 }
1435                 break;
1436
1437         case KVMPPC_VSX_COPY_WORD:
1438                 vsx_offset =
1439                         kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1440
1441                 if (vsx_offset == -1) {
1442                         result = -1;
1443                         break;
1444                 }
1445
1446                 if (rs < 32) {
1447                         dword_offset = vsx_offset / 2;
1448                         word_offset = vsx_offset % 2;
1449                         reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
1450                         *val = reg.vsx32val[word_offset];
1451                 } else {
1452                         reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1453                         *val = reg.vsx32val[vsx_offset];
1454                 }
1455                 break;
1456
1457         default:
1458                 result = -1;
1459                 break;
1460         }
1461
1462         return result;
1463 }
1464
1465 int kvmppc_handle_vsx_store(struct kvm_vcpu *vcpu,
1466                         int rs, unsigned int bytes, int is_default_endian)
1467 {
1468         u64 val;
1469         enum emulation_result emulated = EMULATE_DONE;
1470
1471         vcpu->arch.io_gpr = rs;
1472
1473         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1474         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1475                 return EMULATE_FAIL;
1476
1477         while (vcpu->arch.mmio_vsx_copy_nums) {
1478                 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1479                         return EMULATE_FAIL;
1480
1481                 emulated = kvmppc_handle_store(vcpu,
1482                          val, bytes, is_default_endian);
1483
1484                 if (emulated != EMULATE_DONE)
1485                         break;
1486
1487                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1488
1489                 vcpu->arch.mmio_vsx_copy_nums--;
1490                 vcpu->arch.mmio_vsx_offset++;
1491         }
1492
1493         return emulated;
1494 }
1495
1496 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu)
1497 {
1498         struct kvm_run *run = vcpu->run;
1499         enum emulation_result emulated = EMULATE_FAIL;
1500         int r;
1501
1502         vcpu->arch.paddr_accessed += run->mmio.len;
1503
1504         if (!vcpu->mmio_is_write) {
1505                 emulated = kvmppc_handle_vsx_load(vcpu, vcpu->arch.io_gpr,
1506                          run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1507         } else {
1508                 emulated = kvmppc_handle_vsx_store(vcpu,
1509                          vcpu->arch.io_gpr, run->mmio.len, 1);
1510         }
1511
1512         switch (emulated) {
1513         case EMULATE_DO_MMIO:
1514                 run->exit_reason = KVM_EXIT_MMIO;
1515                 r = RESUME_HOST;
1516                 break;
1517         case EMULATE_FAIL:
1518                 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1519                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1520                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1521                 r = RESUME_HOST;
1522                 break;
1523         default:
1524                 r = RESUME_GUEST;
1525                 break;
1526         }
1527         return r;
1528 }
1529 #endif /* CONFIG_VSX */
1530
1531 #ifdef CONFIG_ALTIVEC
1532 int kvmppc_handle_vmx_load(struct kvm_vcpu *vcpu,
1533                 unsigned int rt, unsigned int bytes, int is_default_endian)
1534 {
1535         enum emulation_result emulated = EMULATE_DONE;
1536
1537         if (vcpu->arch.mmio_vmx_copy_nums > 2)
1538                 return EMULATE_FAIL;
1539
1540         while (vcpu->arch.mmio_vmx_copy_nums) {
1541                 emulated = __kvmppc_handle_load(vcpu, rt, bytes,
1542                                 is_default_endian, 0);
1543
1544                 if (emulated != EMULATE_DONE)
1545                         break;
1546
1547                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1548                 vcpu->arch.mmio_vmx_copy_nums--;
1549                 vcpu->arch.mmio_vmx_offset++;
1550         }
1551
1552         return emulated;
1553 }
1554
1555 static int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
1556 {
1557         union kvmppc_one_reg reg;
1558         int vmx_offset = 0;
1559         int result = 0;
1560
1561         vmx_offset =
1562                 kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1563
1564         if (vmx_offset == -1)
1565                 return -1;
1566
1567         reg.vval = VCPU_VSX_VR(vcpu, index);
1568         *val = reg.vsxval[vmx_offset];
1569
1570         return result;
1571 }
1572
1573 static int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
1574 {
1575         union kvmppc_one_reg reg;
1576         int vmx_offset = 0;
1577         int result = 0;
1578
1579         vmx_offset =
1580                 kvmppc_get_vmx_word_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1581
1582         if (vmx_offset == -1)
1583                 return -1;
1584
1585         reg.vval = VCPU_VSX_VR(vcpu, index);
1586         *val = reg.vsx32val[vmx_offset];
1587
1588         return result;
1589 }
1590
1591 static int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
1592 {
1593         union kvmppc_one_reg reg;
1594         int vmx_offset = 0;
1595         int result = 0;
1596
1597         vmx_offset =
1598                 kvmppc_get_vmx_hword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1599
1600         if (vmx_offset == -1)
1601                 return -1;
1602
1603         reg.vval = VCPU_VSX_VR(vcpu, index);
1604         *val = reg.vsx16val[vmx_offset];
1605
1606         return result;
1607 }
1608
1609 static int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
1610 {
1611         union kvmppc_one_reg reg;
1612         int vmx_offset = 0;
1613         int result = 0;
1614
1615         vmx_offset =
1616                 kvmppc_get_vmx_byte_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1617
1618         if (vmx_offset == -1)
1619                 return -1;
1620
1621         reg.vval = VCPU_VSX_VR(vcpu, index);
1622         *val = reg.vsx8val[vmx_offset];
1623
1624         return result;
1625 }
1626
1627 int kvmppc_handle_vmx_store(struct kvm_vcpu *vcpu,
1628                 unsigned int rs, unsigned int bytes, int is_default_endian)
1629 {
1630         u64 val = 0;
1631         unsigned int index = rs & KVM_MMIO_REG_MASK;
1632         enum emulation_result emulated = EMULATE_DONE;
1633
1634         if (vcpu->arch.mmio_vmx_copy_nums > 2)
1635                 return EMULATE_FAIL;
1636
1637         vcpu->arch.io_gpr = rs;
1638
1639         while (vcpu->arch.mmio_vmx_copy_nums) {
1640                 switch (vcpu->arch.mmio_copy_type) {
1641                 case KVMPPC_VMX_COPY_DWORD:
1642                         if (kvmppc_get_vmx_dword(vcpu, index, &val) == -1)
1643                                 return EMULATE_FAIL;
1644
1645                         break;
1646                 case KVMPPC_VMX_COPY_WORD:
1647                         if (kvmppc_get_vmx_word(vcpu, index, &val) == -1)
1648                                 return EMULATE_FAIL;
1649                         break;
1650                 case KVMPPC_VMX_COPY_HWORD:
1651                         if (kvmppc_get_vmx_hword(vcpu, index, &val) == -1)
1652                                 return EMULATE_FAIL;
1653                         break;
1654                 case KVMPPC_VMX_COPY_BYTE:
1655                         if (kvmppc_get_vmx_byte(vcpu, index, &val) == -1)
1656                                 return EMULATE_FAIL;
1657                         break;
1658                 default:
1659                         return EMULATE_FAIL;
1660                 }
1661
1662                 emulated = kvmppc_handle_store(vcpu, val, bytes,
1663                                 is_default_endian);
1664                 if (emulated != EMULATE_DONE)
1665                         break;
1666
1667                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1668                 vcpu->arch.mmio_vmx_copy_nums--;
1669                 vcpu->arch.mmio_vmx_offset++;
1670         }
1671
1672         return emulated;
1673 }
1674
1675 static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu)
1676 {
1677         struct kvm_run *run = vcpu->run;
1678         enum emulation_result emulated = EMULATE_FAIL;
1679         int r;
1680
1681         vcpu->arch.paddr_accessed += run->mmio.len;
1682
1683         if (!vcpu->mmio_is_write) {
1684                 emulated = kvmppc_handle_vmx_load(vcpu,
1685                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1686         } else {
1687                 emulated = kvmppc_handle_vmx_store(vcpu,
1688                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1689         }
1690
1691         switch (emulated) {
1692         case EMULATE_DO_MMIO:
1693                 run->exit_reason = KVM_EXIT_MMIO;
1694                 r = RESUME_HOST;
1695                 break;
1696         case EMULATE_FAIL:
1697                 pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
1698                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1699                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1700                 r = RESUME_HOST;
1701                 break;
1702         default:
1703                 r = RESUME_GUEST;
1704                 break;
1705         }
1706         return r;
1707 }
1708 #endif /* CONFIG_ALTIVEC */
1709
1710 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1711 {
1712         int r = 0;
1713         union kvmppc_one_reg val;
1714         int size;
1715
1716         size = one_reg_size(reg->id);
1717         if (size > sizeof(val))
1718                 return -EINVAL;
1719
1720         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1721         if (r == -EINVAL) {
1722                 r = 0;
1723                 switch (reg->id) {
1724 #ifdef CONFIG_ALTIVEC
1725                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1726                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1727                                 r = -ENXIO;
1728                                 break;
1729                         }
1730                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1731                         break;
1732                 case KVM_REG_PPC_VSCR:
1733                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1734                                 r = -ENXIO;
1735                                 break;
1736                         }
1737                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1738                         break;
1739                 case KVM_REG_PPC_VRSAVE:
1740                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
1741                         break;
1742 #endif /* CONFIG_ALTIVEC */
1743                 default:
1744                         r = -EINVAL;
1745                         break;
1746                 }
1747         }
1748
1749         if (r)
1750                 return r;
1751
1752         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1753                 r = -EFAULT;
1754
1755         return r;
1756 }
1757
1758 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1759 {
1760         int r;
1761         union kvmppc_one_reg val;
1762         int size;
1763
1764         size = one_reg_size(reg->id);
1765         if (size > sizeof(val))
1766                 return -EINVAL;
1767
1768         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1769                 return -EFAULT;
1770
1771         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1772         if (r == -EINVAL) {
1773                 r = 0;
1774                 switch (reg->id) {
1775 #ifdef CONFIG_ALTIVEC
1776                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1777                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1778                                 r = -ENXIO;
1779                                 break;
1780                         }
1781                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1782                         break;
1783                 case KVM_REG_PPC_VSCR:
1784                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1785                                 r = -ENXIO;
1786                                 break;
1787                         }
1788                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1789                         break;
1790                 case KVM_REG_PPC_VRSAVE:
1791                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1792                                 r = -ENXIO;
1793                                 break;
1794                         }
1795                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
1796                         break;
1797 #endif /* CONFIG_ALTIVEC */
1798                 default:
1799                         r = -EINVAL;
1800                         break;
1801                 }
1802         }
1803
1804         return r;
1805 }
1806
1807 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
1808 {
1809         struct kvm_run *run = vcpu->run;
1810         int r;
1811
1812         vcpu_load(vcpu);
1813
1814         if (vcpu->mmio_needed) {
1815                 vcpu->mmio_needed = 0;
1816                 if (!vcpu->mmio_is_write)
1817                         kvmppc_complete_mmio_load(vcpu);
1818 #ifdef CONFIG_VSX
1819                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1820                         vcpu->arch.mmio_vsx_copy_nums--;
1821                         vcpu->arch.mmio_vsx_offset++;
1822                 }
1823
1824                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1825                         r = kvmppc_emulate_mmio_vsx_loadstore(vcpu);
1826                         if (r == RESUME_HOST) {
1827                                 vcpu->mmio_needed = 1;
1828                                 goto out;
1829                         }
1830                 }
1831 #endif
1832 #ifdef CONFIG_ALTIVEC
1833                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1834                         vcpu->arch.mmio_vmx_copy_nums--;
1835                         vcpu->arch.mmio_vmx_offset++;
1836                 }
1837
1838                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1839                         r = kvmppc_emulate_mmio_vmx_loadstore(vcpu);
1840                         if (r == RESUME_HOST) {
1841                                 vcpu->mmio_needed = 1;
1842                                 goto out;
1843                         }
1844                 }
1845 #endif
1846         } else if (vcpu->arch.osi_needed) {
1847                 u64 *gprs = run->osi.gprs;
1848                 int i;
1849
1850                 for (i = 0; i < 32; i++)
1851                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1852                 vcpu->arch.osi_needed = 0;
1853         } else if (vcpu->arch.hcall_needed) {
1854                 int i;
1855
1856                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1857                 for (i = 0; i < 9; ++i)
1858                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1859                 vcpu->arch.hcall_needed = 0;
1860 #ifdef CONFIG_BOOKE
1861         } else if (vcpu->arch.epr_needed) {
1862                 kvmppc_set_epr(vcpu, run->epr.epr);
1863                 vcpu->arch.epr_needed = 0;
1864 #endif
1865         }
1866
1867         kvm_sigset_activate(vcpu);
1868
1869         if (run->immediate_exit)
1870                 r = -EINTR;
1871         else
1872                 r = kvmppc_vcpu_run(vcpu);
1873
1874         kvm_sigset_deactivate(vcpu);
1875
1876 #ifdef CONFIG_ALTIVEC
1877 out:
1878 #endif
1879
1880         /*
1881          * We're already returning to userspace, don't pass the
1882          * RESUME_HOST flags along.
1883          */
1884         if (r > 0)
1885                 r = 0;
1886
1887         vcpu_put(vcpu);
1888         return r;
1889 }
1890
1891 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1892 {
1893         if (irq->irq == KVM_INTERRUPT_UNSET) {
1894                 kvmppc_core_dequeue_external(vcpu);
1895                 return 0;
1896         }
1897
1898         kvmppc_core_queue_external(vcpu, irq);
1899
1900         kvm_vcpu_kick(vcpu);
1901
1902         return 0;
1903 }
1904
1905 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1906                                      struct kvm_enable_cap *cap)
1907 {
1908         int r;
1909
1910         if (cap->flags)
1911                 return -EINVAL;
1912
1913         switch (cap->cap) {
1914         case KVM_CAP_PPC_OSI:
1915                 r = 0;
1916                 vcpu->arch.osi_enabled = true;
1917                 break;
1918         case KVM_CAP_PPC_PAPR:
1919                 r = 0;
1920                 vcpu->arch.papr_enabled = true;
1921                 break;
1922         case KVM_CAP_PPC_EPR:
1923                 r = 0;
1924                 if (cap->args[0])
1925                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1926                 else
1927                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1928                 break;
1929 #ifdef CONFIG_BOOKE
1930         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1931                 r = 0;
1932                 vcpu->arch.watchdog_enabled = true;
1933                 break;
1934 #endif
1935 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1936         case KVM_CAP_SW_TLB: {
1937                 struct kvm_config_tlb cfg;
1938                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1939
1940                 r = -EFAULT;
1941                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1942                         break;
1943
1944                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1945                 break;
1946         }
1947 #endif
1948 #ifdef CONFIG_KVM_MPIC
1949         case KVM_CAP_IRQ_MPIC: {
1950                 struct fd f;
1951                 struct kvm_device *dev;
1952
1953                 r = -EBADF;
1954                 f = fdget(cap->args[0]);
1955                 if (!f.file)
1956                         break;
1957
1958                 r = -EPERM;
1959                 dev = kvm_device_from_filp(f.file);
1960                 if (dev)
1961                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1962
1963                 fdput(f);
1964                 break;
1965         }
1966 #endif
1967 #ifdef CONFIG_KVM_XICS
1968         case KVM_CAP_IRQ_XICS: {
1969                 struct fd f;
1970                 struct kvm_device *dev;
1971
1972                 r = -EBADF;
1973                 f = fdget(cap->args[0]);
1974                 if (!f.file)
1975                         break;
1976
1977                 r = -EPERM;
1978                 dev = kvm_device_from_filp(f.file);
1979                 if (dev) {
1980                         if (xics_on_xive())
1981                                 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1982                         else
1983                                 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1984                 }
1985
1986                 fdput(f);
1987                 break;
1988         }
1989 #endif /* CONFIG_KVM_XICS */
1990 #ifdef CONFIG_KVM_XIVE
1991         case KVM_CAP_PPC_IRQ_XIVE: {
1992                 struct fd f;
1993                 struct kvm_device *dev;
1994
1995                 r = -EBADF;
1996                 f = fdget(cap->args[0]);
1997                 if (!f.file)
1998                         break;
1999
2000                 r = -ENXIO;
2001                 if (!xive_enabled())
2002                         break;
2003
2004                 r = -EPERM;
2005                 dev = kvm_device_from_filp(f.file);
2006                 if (dev)
2007                         r = kvmppc_xive_native_connect_vcpu(dev, vcpu,
2008                                                             cap->args[1]);
2009
2010                 fdput(f);
2011                 break;
2012         }
2013 #endif /* CONFIG_KVM_XIVE */
2014 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
2015         case KVM_CAP_PPC_FWNMI:
2016                 r = -EINVAL;
2017                 if (!is_kvmppc_hv_enabled(vcpu->kvm))
2018                         break;
2019                 r = 0;
2020                 vcpu->kvm->arch.fwnmi_enabled = true;
2021                 break;
2022 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
2023         default:
2024                 r = -EINVAL;
2025                 break;
2026         }
2027
2028         if (!r)
2029                 r = kvmppc_sanity_check(vcpu);
2030
2031         return r;
2032 }
2033
2034 bool kvm_arch_intc_initialized(struct kvm *kvm)
2035 {
2036 #ifdef CONFIG_KVM_MPIC
2037         if (kvm->arch.mpic)
2038                 return true;
2039 #endif
2040 #ifdef CONFIG_KVM_XICS
2041         if (kvm->arch.xics || kvm->arch.xive)
2042                 return true;
2043 #endif
2044         return false;
2045 }
2046
2047 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
2048                                     struct kvm_mp_state *mp_state)
2049 {
2050         return -EINVAL;
2051 }
2052
2053 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
2054                                     struct kvm_mp_state *mp_state)
2055 {
2056         return -EINVAL;
2057 }
2058
2059 long kvm_arch_vcpu_async_ioctl(struct file *filp,
2060                                unsigned int ioctl, unsigned long arg)
2061 {
2062         struct kvm_vcpu *vcpu = filp->private_data;
2063         void __user *argp = (void __user *)arg;
2064
2065         if (ioctl == KVM_INTERRUPT) {
2066                 struct kvm_interrupt irq;
2067                 if (copy_from_user(&irq, argp, sizeof(irq)))
2068                         return -EFAULT;
2069                 return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2070         }
2071         return -ENOIOCTLCMD;
2072 }
2073
2074 long kvm_arch_vcpu_ioctl(struct file *filp,
2075                          unsigned int ioctl, unsigned long arg)
2076 {
2077         struct kvm_vcpu *vcpu = filp->private_data;
2078         void __user *argp = (void __user *)arg;
2079         long r;
2080
2081         switch (ioctl) {
2082         case KVM_ENABLE_CAP:
2083         {
2084                 struct kvm_enable_cap cap;
2085                 r = -EFAULT;
2086                 if (copy_from_user(&cap, argp, sizeof(cap)))
2087                         goto out;
2088                 vcpu_load(vcpu);
2089                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
2090                 vcpu_put(vcpu);
2091                 break;
2092         }
2093
2094         case KVM_SET_ONE_REG:
2095         case KVM_GET_ONE_REG:
2096         {
2097                 struct kvm_one_reg reg;
2098                 r = -EFAULT;
2099                 if (copy_from_user(&reg, argp, sizeof(reg)))
2100                         goto out;
2101                 if (ioctl == KVM_SET_ONE_REG)
2102                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
2103                 else
2104                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
2105                 break;
2106         }
2107
2108 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
2109         case KVM_DIRTY_TLB: {
2110                 struct kvm_dirty_tlb dirty;
2111                 r = -EFAULT;
2112                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
2113                         goto out;
2114                 vcpu_load(vcpu);
2115                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
2116                 vcpu_put(vcpu);
2117                 break;
2118         }
2119 #endif
2120         default:
2121                 r = -EINVAL;
2122         }
2123
2124 out:
2125         return r;
2126 }
2127
2128 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2129 {
2130         return VM_FAULT_SIGBUS;
2131 }
2132
2133 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
2134 {
2135         u32 inst_nop = 0x60000000;
2136 #ifdef CONFIG_KVM_BOOKE_HV
2137         u32 inst_sc1 = 0x44000022;
2138         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
2139         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
2140         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
2141         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2142 #else
2143         u32 inst_lis = 0x3c000000;
2144         u32 inst_ori = 0x60000000;
2145         u32 inst_sc = 0x44000002;
2146         u32 inst_imm_mask = 0xffff;
2147
2148         /*
2149          * The hypercall to get into KVM from within guest context is as
2150          * follows:
2151          *
2152          *    lis r0, r0, KVM_SC_MAGIC_R0@h
2153          *    ori r0, KVM_SC_MAGIC_R0@l
2154          *    sc
2155          *    nop
2156          */
2157         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
2158         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
2159         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
2160         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2161 #endif
2162
2163         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
2164
2165         return 0;
2166 }
2167
2168 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
2169                           bool line_status)
2170 {
2171         if (!irqchip_in_kernel(kvm))
2172                 return -ENXIO;
2173
2174         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
2175                                         irq_event->irq, irq_event->level,
2176                                         line_status);
2177         return 0;
2178 }
2179
2180
2181 int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
2182                             struct kvm_enable_cap *cap)
2183 {
2184         int r;
2185
2186         if (cap->flags)
2187                 return -EINVAL;
2188
2189         switch (cap->cap) {
2190 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
2191         case KVM_CAP_PPC_ENABLE_HCALL: {
2192                 unsigned long hcall = cap->args[0];
2193
2194                 r = -EINVAL;
2195                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
2196                     cap->args[1] > 1)
2197                         break;
2198                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
2199                         break;
2200                 if (cap->args[1])
2201                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
2202                 else
2203                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
2204                 r = 0;
2205                 break;
2206         }
2207         case KVM_CAP_PPC_SMT: {
2208                 unsigned long mode = cap->args[0];
2209                 unsigned long flags = cap->args[1];
2210
2211                 r = -EINVAL;
2212                 if (kvm->arch.kvm_ops->set_smt_mode)
2213                         r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
2214                 break;
2215         }
2216
2217         case KVM_CAP_PPC_NESTED_HV:
2218                 r = -EINVAL;
2219                 if (!is_kvmppc_hv_enabled(kvm) ||
2220                     !kvm->arch.kvm_ops->enable_nested)
2221                         break;
2222                 r = kvm->arch.kvm_ops->enable_nested(kvm);
2223                 break;
2224 #endif
2225 #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
2226         case KVM_CAP_PPC_SECURE_GUEST:
2227                 r = -EINVAL;
2228                 if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_svm)
2229                         break;
2230                 r = kvm->arch.kvm_ops->enable_svm(kvm);
2231                 break;
2232         case KVM_CAP_PPC_DAWR1:
2233                 r = -EINVAL;
2234                 if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_dawr1)
2235                         break;
2236                 r = kvm->arch.kvm_ops->enable_dawr1(kvm);
2237                 break;
2238 #endif
2239         default:
2240                 r = -EINVAL;
2241                 break;
2242         }
2243
2244         return r;
2245 }
2246
2247 #ifdef CONFIG_PPC_BOOK3S_64
2248 /*
2249  * These functions check whether the underlying hardware is safe
2250  * against attacks based on observing the effects of speculatively
2251  * executed instructions, and whether it supplies instructions for
2252  * use in workarounds.  The information comes from firmware, either
2253  * via the device tree on powernv platforms or from an hcall on
2254  * pseries platforms.
2255  */
2256 #ifdef CONFIG_PPC_PSERIES
2257 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2258 {
2259         struct h_cpu_char_result c;
2260         unsigned long rc;
2261
2262         if (!machine_is(pseries))
2263                 return -ENOTTY;
2264
2265         rc = plpar_get_cpu_characteristics(&c);
2266         if (rc == H_SUCCESS) {
2267                 cp->character = c.character;
2268                 cp->behaviour = c.behaviour;
2269                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2270                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2271                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2272                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2273                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2274                         KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
2275                         KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
2276                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2277                         KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2278                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2279                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2280                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2281                         KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2282         }
2283         return 0;
2284 }
2285 #else
2286 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2287 {
2288         return -ENOTTY;
2289 }
2290 #endif
2291
2292 static inline bool have_fw_feat(struct device_node *fw_features,
2293                                 const char *state, const char *name)
2294 {
2295         struct device_node *np;
2296         bool r = false;
2297
2298         np = of_get_child_by_name(fw_features, name);
2299         if (np) {
2300                 r = of_property_read_bool(np, state);
2301                 of_node_put(np);
2302         }
2303         return r;
2304 }
2305
2306 static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2307 {
2308         struct device_node *np, *fw_features;
2309         int r;
2310
2311         memset(cp, 0, sizeof(*cp));
2312         r = pseries_get_cpu_char(cp);
2313         if (r != -ENOTTY)
2314                 return r;
2315
2316         np = of_find_node_by_name(NULL, "ibm,opal");
2317         if (np) {
2318                 fw_features = of_get_child_by_name(np, "fw-features");
2319                 of_node_put(np);
2320                 if (!fw_features)
2321                         return 0;
2322                 if (have_fw_feat(fw_features, "enabled",
2323                                  "inst-spec-barrier-ori31,31,0"))
2324                         cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31;
2325                 if (have_fw_feat(fw_features, "enabled",
2326                                  "fw-bcctrl-serialized"))
2327                         cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED;
2328                 if (have_fw_feat(fw_features, "enabled",
2329                                  "inst-l1d-flush-ori30,30,0"))
2330                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30;
2331                 if (have_fw_feat(fw_features, "enabled",
2332                                  "inst-l1d-flush-trig2"))
2333                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2;
2334                 if (have_fw_feat(fw_features, "enabled",
2335                                  "fw-l1d-thread-split"))
2336                         cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV;
2337                 if (have_fw_feat(fw_features, "enabled",
2338                                  "fw-count-cache-disabled"))
2339                         cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2340                 if (have_fw_feat(fw_features, "enabled",
2341                                  "fw-count-cache-flush-bcctr2,0,0"))
2342                         cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2343                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2344                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2345                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2346                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2347                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2348                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2349                         KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2350
2351                 if (have_fw_feat(fw_features, "enabled",
2352                                  "speculation-policy-favor-security"))
2353                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY;
2354                 if (!have_fw_feat(fw_features, "disabled",
2355                                   "needs-l1d-flush-msr-pr-0-to-1"))
2356                         cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR;
2357                 if (!have_fw_feat(fw_features, "disabled",
2358                                   "needs-spec-barrier-for-bound-checks"))
2359                         cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2360                 if (have_fw_feat(fw_features, "enabled",
2361                                  "needs-count-cache-flush-on-context-switch"))
2362                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2363                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2364                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2365                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2366                         KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2367
2368                 of_node_put(fw_features);
2369         }
2370
2371         return 0;
2372 }
2373 #endif
2374
2375 long kvm_arch_vm_ioctl(struct file *filp,
2376                        unsigned int ioctl, unsigned long arg)
2377 {
2378         struct kvm *kvm __maybe_unused = filp->private_data;
2379         void __user *argp = (void __user *)arg;
2380         long r;
2381
2382         switch (ioctl) {
2383         case KVM_PPC_GET_PVINFO: {
2384                 struct kvm_ppc_pvinfo pvinfo;
2385                 memset(&pvinfo, 0, sizeof(pvinfo));
2386                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
2387                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
2388                         r = -EFAULT;
2389                         goto out;
2390                 }
2391
2392                 break;
2393         }
2394 #ifdef CONFIG_SPAPR_TCE_IOMMU
2395         case KVM_CREATE_SPAPR_TCE_64: {
2396                 struct kvm_create_spapr_tce_64 create_tce_64;
2397
2398                 r = -EFAULT;
2399                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
2400                         goto out;
2401                 if (create_tce_64.flags) {
2402                         r = -EINVAL;
2403                         goto out;
2404                 }
2405                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2406                 goto out;
2407         }
2408         case KVM_CREATE_SPAPR_TCE: {
2409                 struct kvm_create_spapr_tce create_tce;
2410                 struct kvm_create_spapr_tce_64 create_tce_64;
2411
2412                 r = -EFAULT;
2413                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
2414                         goto out;
2415
2416                 create_tce_64.liobn = create_tce.liobn;
2417                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
2418                 create_tce_64.offset = 0;
2419                 create_tce_64.size = create_tce.window_size >>
2420                                 IOMMU_PAGE_SHIFT_4K;
2421                 create_tce_64.flags = 0;
2422                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2423                 goto out;
2424         }
2425 #endif
2426 #ifdef CONFIG_PPC_BOOK3S_64
2427         case KVM_PPC_GET_SMMU_INFO: {
2428                 struct kvm_ppc_smmu_info info;
2429                 struct kvm *kvm = filp->private_data;
2430
2431                 memset(&info, 0, sizeof(info));
2432                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2433                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2434                         r = -EFAULT;
2435                 break;
2436         }
2437         case KVM_PPC_RTAS_DEFINE_TOKEN: {
2438                 struct kvm *kvm = filp->private_data;
2439
2440                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
2441                 break;
2442         }
2443         case KVM_PPC_CONFIGURE_V3_MMU: {
2444                 struct kvm *kvm = filp->private_data;
2445                 struct kvm_ppc_mmuv3_cfg cfg;
2446
2447                 r = -EINVAL;
2448                 if (!kvm->arch.kvm_ops->configure_mmu)
2449                         goto out;
2450                 r = -EFAULT;
2451                 if (copy_from_user(&cfg, argp, sizeof(cfg)))
2452                         goto out;
2453                 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
2454                 break;
2455         }
2456         case KVM_PPC_GET_RMMU_INFO: {
2457                 struct kvm *kvm = filp->private_data;
2458                 struct kvm_ppc_rmmu_info info;
2459
2460                 r = -EINVAL;
2461                 if (!kvm->arch.kvm_ops->get_rmmu_info)
2462                         goto out;
2463                 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
2464                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2465                         r = -EFAULT;
2466                 break;
2467         }
2468         case KVM_PPC_GET_CPU_CHAR: {
2469                 struct kvm_ppc_cpu_char cpuchar;
2470
2471                 r = kvmppc_get_cpu_char(&cpuchar);
2472                 if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar)))
2473                         r = -EFAULT;
2474                 break;
2475         }
2476         case KVM_PPC_SVM_OFF: {
2477                 struct kvm *kvm = filp->private_data;
2478
2479                 r = 0;
2480                 if (!kvm->arch.kvm_ops->svm_off)
2481                         goto out;
2482
2483                 r = kvm->arch.kvm_ops->svm_off(kvm);
2484                 break;
2485         }
2486         default: {
2487                 struct kvm *kvm = filp->private_data;
2488                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
2489         }
2490 #else /* CONFIG_PPC_BOOK3S_64 */
2491         default:
2492                 r = -ENOTTY;
2493 #endif
2494         }
2495 out:
2496         return r;
2497 }
2498
2499 static DEFINE_IDA(lpid_inuse);
2500 static unsigned long nr_lpids;
2501
2502 long kvmppc_alloc_lpid(void)
2503 {
2504         int lpid;
2505
2506         /* The host LPID must always be 0 (allocation starts at 1) */
2507         lpid = ida_alloc_range(&lpid_inuse, 1, nr_lpids - 1, GFP_KERNEL);
2508         if (lpid < 0) {
2509                 if (lpid == -ENOMEM)
2510                         pr_err("%s: Out of memory\n", __func__);
2511                 else
2512                         pr_err("%s: No LPIDs free\n", __func__);
2513                 return -ENOMEM;
2514         }
2515
2516         return lpid;
2517 }
2518 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2519
2520 void kvmppc_free_lpid(long lpid)
2521 {
2522         ida_free(&lpid_inuse, lpid);
2523 }
2524 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2525
2526 /* nr_lpids_param includes the host LPID */
2527 void kvmppc_init_lpid(unsigned long nr_lpids_param)
2528 {
2529         nr_lpids = nr_lpids_param;
2530 }
2531 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2532
2533 int kvm_arch_init(void *opaque)
2534 {
2535         return 0;
2536 }
2537
2538 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);
2539
2540 void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry)
2541 {
2542         if (vcpu->kvm->arch.kvm_ops->create_vcpu_debugfs)
2543                 vcpu->kvm->arch.kvm_ops->create_vcpu_debugfs(vcpu, debugfs_dentry);
2544 }
2545
2546 int kvm_arch_create_vm_debugfs(struct kvm *kvm)
2547 {
2548         if (kvm->arch.kvm_ops->create_vm_debugfs)
2549                 kvm->arch.kvm_ops->create_vm_debugfs(kvm);
2550         return 0;
2551 }