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 "../mm/mmu_decl.h"
  40
  41 #define CREATE_TRACE_POINTS
  42 #include "trace.h"
  43
  44 struct kvmppc_ops *kvmppc_hv_ops;
  45 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
  46 struct kvmppc_ops *kvmppc_pr_ops;
  47 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
  48
  49
  50 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  51 {
  52         return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
  53 }
  54
  55 bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu)
  56 {
  57         return kvm_arch_vcpu_runnable(vcpu);
  58 }
  59
  60 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
  61 {
  62         return false;
  63 }
  64
  65 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  66 {
  67         return 1;
  68 }
  69
  70 /*
  71  * Common checks before entering the guest world.  Call with interrupts
  72  * disabled.
  73  *
  74  * returns:
  75  *
  76  * == 1 if we're ready to go into guest state
  77  * <= 0 if we need to go back to the host with return value
  78  */
  79 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
  80 {
  81         int r;
  82
  83         WARN_ON(irqs_disabled());
  84         hard_irq_disable();
  85
  86         while (true) {
  87                 if (need_resched()) {
  88                         local_irq_enable();
  89                         cond_resched();
  90                         hard_irq_disable();
  91                         continue;
  92                 }
  93
  94                 if (signal_pending(current)) {
  95                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
  96                         vcpu->run->exit_reason = KVM_EXIT_INTR;
  97                         r = -EINTR;
  98                         break;
  99                 }
 100
 101                 vcpu->mode = IN_GUEST_MODE;
 102
 103                 /*
 104                  * Reading vcpu->requests must happen after setting vcpu->mode,
 105                  * so we don't miss a request because the requester sees
 106                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
 107                  * before next entering the guest (and thus doesn't IPI).
 108                  * This also orders the write to mode from any reads
 109                  * to the page tables done while the VCPU is running.
 110                  * Please see the comment in kvm_flush_remote_tlbs.
 111                  */
 112                 smp_mb();
 113
 114                 if (kvm_request_pending(vcpu)) {
 115                         /* Make sure we process requests preemptable */
 116                         local_irq_enable();
 117                         trace_kvm_check_requests(vcpu);
 118                         r = kvmppc_core_check_requests(vcpu);
 119                         hard_irq_disable();
 120                         if (r > 0)
 121                                 continue;
 122                         break;
 123                 }
 124
 125                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 126                         /* interrupts got enabled in between, so we
 127                            are back at square 1 */
 128                         continue;
 129                 }
 130
 131                 guest_enter_irqoff();
 132                 return 1;
 133         }
 134
 135         /* return to host */
 136         local_irq_enable();
 137         return r;
 138 }
 139 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
 140
 141 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 142 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
 143 {
 144         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
 145         int i;
 146
 147         shared->sprg0 = swab64(shared->sprg0);
 148         shared->sprg1 = swab64(shared->sprg1);
 149         shared->sprg2 = swab64(shared->sprg2);
 150         shared->sprg3 = swab64(shared->sprg3);
 151         shared->srr0 = swab64(shared->srr0);
 152         shared->srr1 = swab64(shared->srr1);
 153         shared->dar = swab64(shared->dar);
 154         shared->msr = swab64(shared->msr);
 155         shared->dsisr = swab32(shared->dsisr);
 156         shared->int_pending = swab32(shared->int_pending);
 157         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
 158                 shared->sr[i] = swab32(shared->sr[i]);
 159 }
 160 #endif
 161
 162 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
 163 {
 164         int nr = kvmppc_get_gpr(vcpu, 11);
 165         int r;
 166         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
 167         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
 168         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
 169         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
 170         unsigned long r2 = 0;
 171
 172         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 173                 /* 32 bit mode */
 174                 param1 &= 0xffffffff;
 175                 param2 &= 0xffffffff;
 176                 param3 &= 0xffffffff;
 177                 param4 &= 0xffffffff;
 178         }
 179
 180         switch (nr) {
 181         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
 182         {
 183 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 184                 /* Book3S can be little endian, find it out here */
 185                 int shared_big_endian = true;
 186                 if (vcpu->arch.intr_msr & MSR_LE)
 187                         shared_big_endian = false;
 188                 if (shared_big_endian != vcpu->arch.shared_big_endian)
 189                         kvmppc_swab_shared(vcpu);
 190                 vcpu->arch.shared_big_endian = shared_big_endian;
 191 #endif
 192
 193                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
 194                         /*
 195                          * Older versions of the Linux magic page code had
 196                          * a bug where they would map their trampoline code
 197                          * NX. If that's the case, remove !PR NX capability.
 198                          */
 199                         vcpu->arch.disable_kernel_nx = true;
 200                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 201                 }
 202
 203                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
 204                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
 205
 206 #ifdef CONFIG_PPC_64K_PAGES
 207                 /*
 208                  * Make sure our 4k magic page is in the same window of a 64k
 209                  * page within the guest and within the host's page.
 210                  */
 211                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
 212                     ((ulong)vcpu->arch.shared & 0xf000)) {
 213                         void *old_shared = vcpu->arch.shared;
 214                         ulong shared = (ulong)vcpu->arch.shared;
 215                         void *new_shared;
 216
 217                         shared &= PAGE_MASK;
 218                         shared |= vcpu->arch.magic_page_pa & 0xf000;
 219                         new_shared = (void*)shared;
 220                         memcpy(new_shared, old_shared, 0x1000);
 221                         vcpu->arch.shared = new_shared;
 222                 }
 223 #endif
 224
 225                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
 226
 227                 r = EV_SUCCESS;
 228                 break;
 229         }
 230         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
 231                 r = EV_SUCCESS;
 232 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
 233                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
 234 #endif
 235
 236                 /* Second return value is in r4 */
 237                 break;
 238         case EV_HCALL_TOKEN(EV_IDLE):
 239                 r = EV_SUCCESS;
 240                 kvm_vcpu_halt(vcpu);
 241                 break;
 242         default:
 243                 r = EV_UNIMPLEMENTED;
 244                 break;
 245         }
 246
 247         kvmppc_set_gpr(vcpu, 4, r2);
 248
 249         return r;
 250 }
 251 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
 252
 253 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 254 {
 255         int r = false;
 256
 257         /* We have to know what CPU to virtualize */
 258         if (!vcpu->arch.pvr)
 259                 goto out;
 260
 261         /* PAPR only works with book3s_64 */
 262         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 263                 goto out;
 264
 265         /* HV KVM can only do PAPR mode for now */
 266         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
 267                 goto out;
 268
 269 #ifdef CONFIG_KVM_BOOKE_HV
 270         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 271                 goto out;
 272 #endif
 273
 274         r = true;
 275
 276 out:
 277         vcpu->arch.sane = r;
 278         return r ? 0 : -EINVAL;
 279 }
 280 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
 281
 282 int kvmppc_emulate_mmio(struct kvm_vcpu *vcpu)
 283 {
 284         enum emulation_result er;
 285         int r;
 286
 287         er = kvmppc_emulate_loadstore(vcpu);
 288         switch (er) {
 289         case EMULATE_DONE:
 290                 /* Future optimization: only reload non-volatiles if they were
 291                  * actually modified. */
 292                 r = RESUME_GUEST_NV;
 293                 break;
 294         case EMULATE_AGAIN:
 295                 r = RESUME_GUEST;
 296                 break;
 297         case EMULATE_DO_MMIO:
 298                 vcpu->run->exit_reason = KVM_EXIT_MMIO;
 299                 /* We must reload nonvolatiles because "update" load/store
 300                  * instructions modify register state. */
 301                 /* Future optimization: only reload non-volatiles if they were
 302                  * actually modified. */
 303                 r = RESUME_HOST_NV;
 304                 break;
 305         case EMULATE_FAIL:
 306         {
 307                 ppc_inst_t last_inst;
 308
 309                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
 310                 kvm_debug_ratelimited("Guest access to device memory using unsupported instruction (opcode: %#08x)\n",
 311                                       ppc_inst_val(last_inst));
 312
 313                 /*
 314                  * Injecting a Data Storage here is a bit more
 315                  * accurate since the instruction that caused the
 316                  * access could still be a valid one.
 317                  */
 318                 if (!IS_ENABLED(CONFIG_BOOKE)) {
 319                         ulong dsisr = DSISR_BADACCESS;
 320
 321                         if (vcpu->mmio_is_write)
 322                                 dsisr |= DSISR_ISSTORE;
 323
 324                         kvmppc_core_queue_data_storage(vcpu,
 325                                         kvmppc_get_msr(vcpu) & SRR1_PREFIXED,
 326                                         vcpu->arch.vaddr_accessed, dsisr);
 327                 } else {
 328                         /*
 329                          * BookE does not send a SIGBUS on a bad
 330                          * fault, so use a Program interrupt instead
 331                          * to avoid a fault loop.
 332                          */
 333                         kvmppc_core_queue_program(vcpu, 0);
 334                 }
 335
 336                 r = RESUME_GUEST;
 337                 break;
 338         }
 339         default:
 340                 WARN_ON(1);
 341                 r = RESUME_GUEST;
 342         }
 343
 344         return r;
 345 }
 346 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
 347
 348 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 349               bool data)
 350 {
 351         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 352         struct kvmppc_pte pte;
 353         int r = -EINVAL;
 354
 355         vcpu->stat.st++;
 356
 357         if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->store_to_eaddr)
 358                 r = vcpu->kvm->arch.kvm_ops->store_to_eaddr(vcpu, eaddr, ptr,
 359                                                             size);
 360
 361         if ((!r) || (r == -EAGAIN))
 362                 return r;
 363
 364         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 365                          XLATE_WRITE, &pte);
 366         if (r < 0)
 367                 return r;
 368
 369         *eaddr = pte.raddr;
 370
 371         if (!pte.may_write)
 372                 return -EPERM;
 373
 374         /* Magic page override */
 375         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 376             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 377             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 378                 void *magic = vcpu->arch.shared;
 379                 magic += pte.eaddr & 0xfff;
 380                 memcpy(magic, ptr, size);
 381                 return EMULATE_DONE;
 382         }
 383
 384         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 385                 return EMULATE_DO_MMIO;
 386
 387         return EMULATE_DONE;
 388 }
 389 EXPORT_SYMBOL_GPL(kvmppc_st);
 390
 391 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 392                       bool data)
 393 {
 394         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 395         struct kvmppc_pte pte;
 396         int rc = -EINVAL;
 397
 398         vcpu->stat.ld++;
 399
 400         if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->load_from_eaddr)
 401                 rc = vcpu->kvm->arch.kvm_ops->load_from_eaddr(vcpu, eaddr, ptr,
 402                                                               size);
 403
 404         if ((!rc) || (rc == -EAGAIN))
 405                 return rc;
 406
 407         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 408                           XLATE_READ, &pte);
 409         if (rc)
 410                 return rc;
 411
 412         *eaddr = pte.raddr;
 413
 414         if (!pte.may_read)
 415                 return -EPERM;
 416
 417         if (!data && !pte.may_execute)
 418                 return -ENOEXEC;
 419
 420         /* Magic page override */
 421         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 422             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 423             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 424                 void *magic = vcpu->arch.shared;
 425                 magic += pte.eaddr & 0xfff;
 426                 memcpy(ptr, magic, size);
 427                 return EMULATE_DONE;
 428         }
 429
 430         kvm_vcpu_srcu_read_lock(vcpu);
 431         rc = kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size);
 432         kvm_vcpu_srcu_read_unlock(vcpu);
 433         if (rc)
 434                 return EMULATE_DO_MMIO;
 435
 436         return EMULATE_DONE;
 437 }
 438 EXPORT_SYMBOL_GPL(kvmppc_ld);
 439
 440 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 441 {
 442         struct kvmppc_ops *kvm_ops = NULL;
 443         int r;
 444
 445         /*
 446          * if we have both HV and PR enabled, default is HV
 447          */
 448         if (type == 0) {
 449                 if (kvmppc_hv_ops)
 450                         kvm_ops = kvmppc_hv_ops;
 451                 else
 452                         kvm_ops = kvmppc_pr_ops;
 453                 if (!kvm_ops)
 454                         goto err_out;
 455         } else  if (type == KVM_VM_PPC_HV) {
 456                 if (!kvmppc_hv_ops)
 457                         goto err_out;
 458                 kvm_ops = kvmppc_hv_ops;
 459         } else if (type == KVM_VM_PPC_PR) {
 460                 if (!kvmppc_pr_ops)
 461                         goto err_out;
 462                 kvm_ops = kvmppc_pr_ops;
 463         } else
 464                 goto err_out;
 465
 466         if (!try_module_get(kvm_ops->owner))
 467                 return -ENOENT;
 468
 469         kvm->arch.kvm_ops = kvm_ops;
 470         r = kvmppc_core_init_vm(kvm);
 471         if (r)
 472                 module_put(kvm_ops->owner);
 473         return r;
 474 err_out:
 475         return -EINVAL;
 476 }
 477
 478 void kvm_arch_destroy_vm(struct kvm *kvm)
 479 {
 480 #ifdef CONFIG_KVM_XICS
 481         /*
 482          * We call kick_all_cpus_sync() to ensure that all
 483          * CPUs have executed any pending IPIs before we
 484          * continue and free VCPUs structures below.
 485          */
 486         if (is_kvmppc_hv_enabled(kvm))
 487                 kick_all_cpus_sync();
 488 #endif
 489
 490         kvm_destroy_vcpus(kvm);
 491
 492         mutex_lock(&kvm->lock);
 493
 494         kvmppc_core_destroy_vm(kvm);
 495
 496         mutex_unlock(&kvm->lock);
 497
 498         /* drop the module reference */
 499         module_put(kvm->arch.kvm_ops->owner);
 500 }
 501
 502 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 503 {
 504         int r;
 505         /* Assume we're using HV mode when the HV module is loaded */
 506         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 507
 508         if (kvm) {
 509                 /*
 510                  * Hooray - we know which VM type we're running on. Depend on
 511                  * that rather than the guess above.
 512                  */
 513                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 514         }
 515
 516         switch (ext) {
 517 #ifdef CONFIG_BOOKE
 518         case KVM_CAP_PPC_BOOKE_SREGS:
 519         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 520         case KVM_CAP_PPC_EPR:
 521 #else
 522         case KVM_CAP_PPC_SEGSTATE:
 523         case KVM_CAP_PPC_HIOR:
 524         case KVM_CAP_PPC_PAPR:
 525 #endif
 526         case KVM_CAP_PPC_UNSET_IRQ:
 527         case KVM_CAP_PPC_IRQ_LEVEL:
 528         case KVM_CAP_ENABLE_CAP:
 529         case KVM_CAP_ONE_REG:
 530         case KVM_CAP_IOEVENTFD:
 531         case KVM_CAP_IMMEDIATE_EXIT:
 532         case KVM_CAP_SET_GUEST_DEBUG:
 533                 r = 1;
 534                 break;
 535         case KVM_CAP_PPC_GUEST_DEBUG_SSTEP:
 536         case KVM_CAP_PPC_PAIRED_SINGLES:
 537         case KVM_CAP_PPC_OSI:
 538         case KVM_CAP_PPC_GET_PVINFO:
 539 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 540         case KVM_CAP_SW_TLB:
 541 #endif
 542                 /* We support this only for PR */
 543                 r = !hv_enabled;
 544                 break;
 545 #ifdef CONFIG_KVM_MPIC
 546         case KVM_CAP_IRQ_MPIC:
 547                 r = 1;
 548                 break;
 549 #endif
 550
 551 #ifdef CONFIG_PPC_BOOK3S_64
 552         case KVM_CAP_SPAPR_TCE:
 553         case KVM_CAP_SPAPR_TCE_64:
 554                 r = 1;
 555                 break;
 556         case KVM_CAP_SPAPR_TCE_VFIO:
 557                 r = !!cpu_has_feature(CPU_FTR_HVMODE);
 558                 break;
 559         case KVM_CAP_PPC_RTAS:
 560         case KVM_CAP_PPC_FIXUP_HCALL:
 561         case KVM_CAP_PPC_ENABLE_HCALL:
 562 #ifdef CONFIG_KVM_XICS
 563         case KVM_CAP_IRQ_XICS:
 564 #endif
 565         case KVM_CAP_PPC_GET_CPU_CHAR:
 566                 r = 1;
 567                 break;
 568 #ifdef CONFIG_KVM_XIVE
 569         case KVM_CAP_PPC_IRQ_XIVE:
 570                 /*
 571                  * We need XIVE to be enabled on the platform (implies
 572                  * a POWER9 processor) and the PowerNV platform, as
 573                  * nested is not yet supported.
 574                  */
 575                 r = xive_enabled() && !!cpu_has_feature(CPU_FTR_HVMODE) &&
 576                         kvmppc_xive_native_supported();
 577                 break;
 578 #endif
 579
 580 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 581         case KVM_CAP_IRQFD_RESAMPLE:
 582                 r = !xive_enabled();
 583                 break;
 584 #endif
 585
 586         case KVM_CAP_PPC_ALLOC_HTAB:
 587                 r = hv_enabled;
 588                 break;
 589 #endif /* CONFIG_PPC_BOOK3S_64 */
 590 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 591         case KVM_CAP_PPC_SMT:
 592                 r = 0;
 593                 if (kvm) {
 594                         if (kvm->arch.emul_smt_mode > 1)
 595                                 r = kvm->arch.emul_smt_mode;
 596                         else
 597                                 r = kvm->arch.smt_mode;
 598                 } else if (hv_enabled) {
 599                         if (cpu_has_feature(CPU_FTR_ARCH_300))
 600                                 r = 1;
 601                         else
 602                                 r = threads_per_subcore;
 603                 }
 604                 break;
 605         case KVM_CAP_PPC_SMT_POSSIBLE:
 606                 r = 1;
 607                 if (hv_enabled) {
 608                         if (!cpu_has_feature(CPU_FTR_ARCH_300))
 609                                 r = ((threads_per_subcore << 1) - 1);
 610                         else
 611                                 /* P9 can emulate dbells, so allow any mode */
 612                                 r = 8 | 4 | 2 | 1;
 613                 }
 614                 break;
 615         case KVM_CAP_PPC_RMA:
 616                 r = 0;
 617                 break;
 618         case KVM_CAP_PPC_HWRNG:
 619                 r = kvmppc_hwrng_present();
 620                 break;
 621         case KVM_CAP_PPC_MMU_RADIX:
 622                 r = !!(hv_enabled && radix_enabled());
 623                 break;
 624         case KVM_CAP_PPC_MMU_HASH_V3:
 625                 r = !!(hv_enabled && kvmppc_hv_ops->hash_v3_possible &&
 626                        kvmppc_hv_ops->hash_v3_possible());
 627                 break;
 628         case KVM_CAP_PPC_NESTED_HV:
 629                 r = !!(hv_enabled && kvmppc_hv_ops->enable_nested &&
 630                        !kvmppc_hv_ops->enable_nested(NULL));
 631                 break;
 632 #endif
 633         case KVM_CAP_SYNC_MMU:
 634                 BUILD_BUG_ON(!IS_ENABLED(CONFIG_KVM_GENERIC_MMU_NOTIFIER));
 635                 r = 1;
 636                 break;
 637 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 638         case KVM_CAP_PPC_HTAB_FD:
 639                 r = hv_enabled;
 640                 break;
 641 #endif
 642         case KVM_CAP_NR_VCPUS:
 643                 /*
 644                  * Recommending a number of CPUs is somewhat arbitrary; we
 645                  * return the number of present CPUs for -HV (since a host
 646                  * will have secondary threads "offline"), and for other KVM
 647                  * implementations just count online CPUs.
 648                  */
 649                 if (hv_enabled)
 650                         r = min_t(unsigned int, num_present_cpus(), KVM_MAX_VCPUS);
 651                 else
 652                         r = min_t(unsigned int, num_online_cpus(), KVM_MAX_VCPUS);
 653                 break;
 654         case KVM_CAP_MAX_VCPUS:
 655                 r = KVM_MAX_VCPUS;
 656                 break;
 657         case KVM_CAP_MAX_VCPU_ID:
 658                 r = KVM_MAX_VCPU_IDS;
 659                 break;
 660 #ifdef CONFIG_PPC_BOOK3S_64
 661         case KVM_CAP_PPC_GET_SMMU_INFO:
 662                 r = 1;
 663                 break;
 664         case KVM_CAP_SPAPR_MULTITCE:
 665                 r = 1;
 666                 break;
 667         case KVM_CAP_SPAPR_RESIZE_HPT:
 668                 r = !!hv_enabled;
 669                 break;
 670 #endif
 671 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 672         case KVM_CAP_PPC_FWNMI:
 673                 r = hv_enabled;
 674                 break;
 675 #endif
 676 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 677         case KVM_CAP_PPC_HTM:
 678                 r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
 679                      (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
 680                 break;
 681 #endif
 682 #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
 683         case KVM_CAP_PPC_SECURE_GUEST:
 684                 r = hv_enabled && kvmppc_hv_ops->enable_svm &&
 685                         !kvmppc_hv_ops->enable_svm(NULL);
 686                 break;
 687         case KVM_CAP_PPC_DAWR1:
 688                 r = !!(hv_enabled && kvmppc_hv_ops->enable_dawr1 &&
 689                        !kvmppc_hv_ops->enable_dawr1(NULL));
 690                 break;
 691         case KVM_CAP_PPC_RPT_INVALIDATE:
 692                 r = 1;
 693                 break;
 694 #endif
 695         case KVM_CAP_PPC_AIL_MODE_3:
 696                 r = 0;
 697                 /*
 698                  * KVM PR, POWER7, and some POWER9s don't support AIL=3 mode.
 699                  * The POWER9s can support it if the guest runs in hash mode,
 700                  * but QEMU doesn't necessarily query the capability in time.
 701                  */
 702                 if (hv_enabled) {
 703                         if (kvmhv_on_pseries()) {
 704                                 if (pseries_reloc_on_exception())
 705                                         r = 1;
 706                         } else if (cpu_has_feature(CPU_FTR_ARCH_207S) &&
 707                                   !cpu_has_feature(CPU_FTR_P9_RADIX_PREFETCH_BUG)) {
 708                                 r = 1;
 709                         }
 710                 }
 711                 break;
 712         default:
 713                 r = 0;
 714                 break;
 715         }
 716         return r;
 717
 718 }
 719
 720 long kvm_arch_dev_ioctl(struct file *filp,
 721                         unsigned int ioctl, unsigned long arg)
 722 {
 723         return -EINVAL;
 724 }
 725
 726 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
 727 {
 728         kvmppc_core_free_memslot(kvm, slot);
 729 }
 730
 731 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 732                                    const struct kvm_memory_slot *old,
 733                                    struct kvm_memory_slot *new,
 734                                    enum kvm_mr_change change)
 735 {
 736         return kvmppc_core_prepare_memory_region(kvm, old, new, change);
 737 }
 738
 739 void kvm_arch_commit_memory_region(struct kvm *kvm,
 740                                    struct kvm_memory_slot *old,
 741                                    const struct kvm_memory_slot *new,
 742                                    enum kvm_mr_change change)
 743 {
 744         kvmppc_core_commit_memory_region(kvm, old, new, change);
 745 }
 746
 747 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 748                                    struct kvm_memory_slot *slot)
 749 {
 750         kvmppc_core_flush_memslot(kvm, slot);
 751 }
 752
 753 int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
 754 {
 755         return 0;
 756 }
 757
 758 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 759 {
 760         struct kvm_vcpu *vcpu;
 761
 762         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 763         kvmppc_decrementer_func(vcpu);
 764
 765         return HRTIMER_NORESTART;
 766 }
 767
 768 int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 769 {
 770         int err;
 771
 772         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 773         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 774
 775 #ifdef CONFIG_KVM_EXIT_TIMING
 776         mutex_init(&vcpu->arch.exit_timing_lock);
 777 #endif
 778         err = kvmppc_subarch_vcpu_init(vcpu);
 779         if (err)
 780                 return err;
 781
 782         err = kvmppc_core_vcpu_create(vcpu);
 783         if (err)
 784                 goto out_vcpu_uninit;
 785
 786         rcuwait_init(&vcpu->arch.wait);
 787         vcpu->arch.waitp = &vcpu->arch.wait;
 788         return 0;
 789
 790 out_vcpu_uninit:
 791         kvmppc_subarch_vcpu_uninit(vcpu);
 792         return err;
 793 }
 794
 795 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 796 {
 797 }
 798
 799 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 800 {
 801         /* Make sure we're not using the vcpu anymore */
 802         hrtimer_cancel(&vcpu->arch.dec_timer);
 803
 804         switch (vcpu->arch.irq_type) {
 805         case KVMPPC_IRQ_MPIC:
 806                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 807                 break;
 808         case KVMPPC_IRQ_XICS:
 809                 if (xics_on_xive())
 810                         kvmppc_xive_cleanup_vcpu(vcpu);
 811                 else
 812                         kvmppc_xics_free_icp(vcpu);
 813                 break;
 814         case KVMPPC_IRQ_XIVE:
 815                 kvmppc_xive_native_cleanup_vcpu(vcpu);
 816                 break;
 817         }
 818
 819         kvmppc_core_vcpu_free(vcpu);
 820
 821         kvmppc_subarch_vcpu_uninit(vcpu);
 822 }
 823
 824 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 825 {
 826         return kvmppc_core_pending_dec(vcpu);
 827 }
 828
 829 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 830 {
 831 #ifdef CONFIG_BOOKE
 832         /*
 833          * vrsave (formerly usprg0) isn't used by Linux, but may
 834          * be used by the guest.
 835          *
 836          * On non-booke this is associated with Altivec and
 837          * is handled by code in book3s.c.
 838          */
 839         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 840 #endif
 841         kvmppc_core_vcpu_load(vcpu, cpu);
 842 }
 843
 844 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 845 {
 846         kvmppc_core_vcpu_put(vcpu);
 847 #ifdef CONFIG_BOOKE
 848         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 849 #endif
 850 }
 851
 852 /*
 853  * irq_bypass_add_producer and irq_bypass_del_producer are only
 854  * useful if the architecture supports PCI passthrough.
 855  * irq_bypass_stop and irq_bypass_start are not needed and so
 856  * kvm_ops are not defined for them.
 857  */
 858 bool kvm_arch_has_irq_bypass(void)
 859 {
 860         return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
 861                 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
 862 }
 863
 864 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
 865                                      struct irq_bypass_producer *prod)
 866 {
 867         struct kvm_kernel_irqfd *irqfd =
 868                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 869         struct kvm *kvm = irqfd->kvm;
 870
 871         if (kvm->arch.kvm_ops->irq_bypass_add_producer)
 872                 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
 873
 874         return 0;
 875 }
 876
 877 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
 878                                       struct irq_bypass_producer *prod)
 879 {
 880         struct kvm_kernel_irqfd *irqfd =
 881                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 882         struct kvm *kvm = irqfd->kvm;
 883
 884         if (kvm->arch.kvm_ops->irq_bypass_del_producer)
 885                 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
 886 }
 887
 888 #ifdef CONFIG_VSX
 889 static inline int kvmppc_get_vsr_dword_offset(int index)
 890 {
 891         int offset;
 892
 893         if ((index != 0) && (index != 1))
 894                 return -1;
 895
 896 #ifdef __BIG_ENDIAN
 897         offset =  index;
 898 #else
 899         offset = 1 - index;
 900 #endif
 901
 902         return offset;
 903 }
 904
 905 static inline int kvmppc_get_vsr_word_offset(int index)
 906 {
 907         int offset;
 908
 909         if ((index > 3) || (index < 0))
 910                 return -1;
 911
 912 #ifdef __BIG_ENDIAN
 913         offset = index;
 914 #else
 915         offset = 3 - index;
 916 #endif
 917         return offset;
 918 }
 919
 920 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
 921         u64 gpr)
 922 {
 923         union kvmppc_one_reg val;
 924         int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
 925         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 926
 927         if (offset == -1)
 928                 return;
 929
 930         if (index >= 32) {
 931                 kvmppc_get_vsx_vr(vcpu, index - 32, &val.vval);
 932                 val.vsxval[offset] = gpr;
 933                 kvmppc_set_vsx_vr(vcpu, index - 32, &val.vval);
 934         } else {
 935                 kvmppc_set_vsx_fpr(vcpu, index, offset, gpr);
 936         }
 937 }
 938
 939 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
 940         u64 gpr)
 941 {
 942         union kvmppc_one_reg val;
 943         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 944
 945         if (index >= 32) {
 946                 kvmppc_get_vsx_vr(vcpu, index - 32, &val.vval);
 947                 val.vsxval[0] = gpr;
 948                 val.vsxval[1] = gpr;
 949                 kvmppc_set_vsx_vr(vcpu, index - 32, &val.vval);
 950         } else {
 951                 kvmppc_set_vsx_fpr(vcpu, index, 0, gpr);
 952                 kvmppc_set_vsx_fpr(vcpu, index, 1,  gpr);
 953         }
 954 }
 955
 956 static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
 957         u32 gpr)
 958 {
 959         union kvmppc_one_reg val;
 960         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 961
 962         if (index >= 32) {
 963                 val.vsx32val[0] = gpr;
 964                 val.vsx32val[1] = gpr;
 965                 val.vsx32val[2] = gpr;
 966                 val.vsx32val[3] = gpr;
 967                 kvmppc_set_vsx_vr(vcpu, index - 32, &val.vval);
 968         } else {
 969                 val.vsx32val[0] = gpr;
 970                 val.vsx32val[1] = gpr;
 971                 kvmppc_set_vsx_fpr(vcpu, index, 0, val.vsxval[0]);
 972                 kvmppc_set_vsx_fpr(vcpu, index, 1, val.vsxval[0]);
 973         }
 974 }
 975
 976 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
 977         u32 gpr32)
 978 {
 979         union kvmppc_one_reg val;
 980         int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
 981         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 982         int dword_offset, word_offset;
 983
 984         if (offset == -1)
 985                 return;
 986
 987         if (index >= 32) {
 988                 kvmppc_get_vsx_vr(vcpu, index - 32, &val.vval);
 989                 val.vsx32val[offset] = gpr32;
 990                 kvmppc_set_vsx_vr(vcpu, index - 32, &val.vval);
 991         } else {
 992                 dword_offset = offset / 2;
 993                 word_offset = offset % 2;
 994                 val.vsxval[0] = kvmppc_get_vsx_fpr(vcpu, index, dword_offset);
 995                 val.vsx32val[word_offset] = gpr32;
 996                 kvmppc_set_vsx_fpr(vcpu, index, dword_offset, val.vsxval[0]);
 997         }
 998 }
 999 #endif /* CONFIG_VSX */
1000
1001 #ifdef CONFIG_ALTIVEC
1002 static inline int kvmppc_get_vmx_offset_generic(struct kvm_vcpu *vcpu,
1003                 int index, int element_size)
1004 {
1005         int offset;
1006         int elts = sizeof(vector128)/element_size;
1007
1008         if ((index < 0) || (index >= elts))
1009                 return -1;
1010
1011         if (kvmppc_need_byteswap(vcpu))
1012                 offset = elts - index - 1;
1013         else
1014                 offset = index;
1015
1016         return offset;
1017 }
1018
1019 static inline int kvmppc_get_vmx_dword_offset(struct kvm_vcpu *vcpu,
1020                 int index)
1021 {
1022         return kvmppc_get_vmx_offset_generic(vcpu, index, 8);
1023 }
1024
1025 static inline int kvmppc_get_vmx_word_offset(struct kvm_vcpu *vcpu,
1026                 int index)
1027 {
1028         return kvmppc_get_vmx_offset_generic(vcpu, index, 4);
1029 }
1030
1031 static inline int kvmppc_get_vmx_hword_offset(struct kvm_vcpu *vcpu,
1032                 int index)
1033 {
1034         return kvmppc_get_vmx_offset_generic(vcpu, index, 2);
1035 }
1036
1037 static inline int kvmppc_get_vmx_byte_offset(struct kvm_vcpu *vcpu,
1038                 int index)
1039 {
1040         return kvmppc_get_vmx_offset_generic(vcpu, index, 1);
1041 }
1042
1043
1044 static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
1045         u64 gpr)
1046 {
1047         union kvmppc_one_reg val;
1048         int offset = kvmppc_get_vmx_dword_offset(vcpu,
1049                         vcpu->arch.mmio_vmx_offset);
1050         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1051
1052         if (offset == -1)
1053                 return;
1054
1055         kvmppc_get_vsx_vr(vcpu, index, &val.vval);
1056         val.vsxval[offset] = gpr;
1057         kvmppc_set_vsx_vr(vcpu, index, &val.vval);
1058 }
1059
1060 static inline void kvmppc_set_vmx_word(struct kvm_vcpu *vcpu,
1061         u32 gpr32)
1062 {
1063         union kvmppc_one_reg val;
1064         int offset = kvmppc_get_vmx_word_offset(vcpu,
1065                         vcpu->arch.mmio_vmx_offset);
1066         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1067
1068         if (offset == -1)
1069                 return;
1070
1071         kvmppc_get_vsx_vr(vcpu, index, &val.vval);
1072         val.vsx32val[offset] = gpr32;
1073         kvmppc_set_vsx_vr(vcpu, index, &val.vval);
1074 }
1075
1076 static inline void kvmppc_set_vmx_hword(struct kvm_vcpu *vcpu,
1077         u16 gpr16)
1078 {
1079         union kvmppc_one_reg val;
1080         int offset = kvmppc_get_vmx_hword_offset(vcpu,
1081                         vcpu->arch.mmio_vmx_offset);
1082         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1083
1084         if (offset == -1)
1085                 return;
1086
1087         kvmppc_get_vsx_vr(vcpu, index, &val.vval);
1088         val.vsx16val[offset] = gpr16;
1089         kvmppc_set_vsx_vr(vcpu, index, &val.vval);
1090 }
1091
1092 static inline void kvmppc_set_vmx_byte(struct kvm_vcpu *vcpu,
1093         u8 gpr8)
1094 {
1095         union kvmppc_one_reg val;
1096         int offset = kvmppc_get_vmx_byte_offset(vcpu,
1097                         vcpu->arch.mmio_vmx_offset);
1098         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1099
1100         if (offset == -1)
1101                 return;
1102
1103         kvmppc_get_vsx_vr(vcpu, index, &val.vval);
1104         val.vsx8val[offset] = gpr8;
1105         kvmppc_set_vsx_vr(vcpu, index, &val.vval);
1106 }
1107 #endif /* CONFIG_ALTIVEC */
1108
1109 #ifdef CONFIG_PPC_FPU
1110 static inline u64 sp_to_dp(u32 fprs)
1111 {
1112         u64 fprd;
1113
1114         preempt_disable();
1115         enable_kernel_fp();
1116         asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m<>" (fprd) : "m<>" (fprs)
1117              : "fr0");
1118         preempt_enable();
1119         return fprd;
1120 }
1121
1122 static inline u32 dp_to_sp(u64 fprd)
1123 {
1124         u32 fprs;
1125
1126         preempt_disable();
1127         enable_kernel_fp();
1128         asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m<>" (fprs) : "m<>" (fprd)
1129              : "fr0");
1130         preempt_enable();
1131         return fprs;
1132 }
1133
1134 #else
1135 #define sp_to_dp(x)     (x)
1136 #define dp_to_sp(x)     (x)
1137 #endif /* CONFIG_PPC_FPU */
1138
1139 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu)
1140 {
1141         struct kvm_run *run = vcpu->run;
1142         u64 gpr;
1143
1144         if (run->mmio.len > sizeof(gpr))
1145                 return;
1146
1147         if (!vcpu->arch.mmio_host_swabbed) {
1148                 switch (run->mmio.len) {
1149                 case 8: gpr = *(u64 *)run->mmio.data; break;
1150                 case 4: gpr = *(u32 *)run->mmio.data; break;
1151                 case 2: gpr = *(u16 *)run->mmio.data; break;
1152                 case 1: gpr = *(u8 *)run->mmio.data; break;
1153                 }
1154         } else {
1155                 switch (run->mmio.len) {
1156                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
1157                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
1158                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
1159                 case 1: gpr = *(u8 *)run->mmio.data; break;
1160                 }
1161         }
1162
1163         /* conversion between single and double precision */
1164         if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
1165                 gpr = sp_to_dp(gpr);
1166
1167         if (vcpu->arch.mmio_sign_extend) {
1168                 switch (run->mmio.len) {
1169 #ifdef CONFIG_PPC64
1170                 case 4:
1171                         gpr = (s64)(s32)gpr;
1172                         break;
1173 #endif
1174                 case 2:
1175                         gpr = (s64)(s16)gpr;
1176                         break;
1177                 case 1:
1178                         gpr = (s64)(s8)gpr;
1179                         break;
1180                 }
1181         }
1182
1183         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1184         case KVM_MMIO_REG_GPR:
1185                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1186                 break;
1187         case KVM_MMIO_REG_FPR:
1188                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1189                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);
1190
1191                 kvmppc_set_fpr(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK, gpr);
1192                 break;
1193 #ifdef CONFIG_PPC_BOOK3S
1194         case KVM_MMIO_REG_QPR:
1195                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1196                 break;
1197         case KVM_MMIO_REG_FQPR:
1198                 kvmppc_set_fpr(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK, gpr);
1199                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1200                 break;
1201 #endif
1202 #ifdef CONFIG_VSX
1203         case KVM_MMIO_REG_VSX:
1204                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1205                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);
1206
1207                 if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
1208                         kvmppc_set_vsr_dword(vcpu, gpr);
1209                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
1210                         kvmppc_set_vsr_word(vcpu, gpr);
1211                 else if (vcpu->arch.mmio_copy_type ==
1212                                 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1213                         kvmppc_set_vsr_dword_dump(vcpu, gpr);
1214                 else if (vcpu->arch.mmio_copy_type ==
1215                                 KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
1216                         kvmppc_set_vsr_word_dump(vcpu, gpr);
1217                 break;
1218 #endif
1219 #ifdef CONFIG_ALTIVEC
1220         case KVM_MMIO_REG_VMX:
1221                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1222                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);
1223
1224                 if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_DWORD)
1225                         kvmppc_set_vmx_dword(vcpu, gpr);
1226                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_WORD)
1227                         kvmppc_set_vmx_word(vcpu, gpr);
1228                 else if (vcpu->arch.mmio_copy_type ==
1229                                 KVMPPC_VMX_COPY_HWORD)
1230                         kvmppc_set_vmx_hword(vcpu, gpr);
1231                 else if (vcpu->arch.mmio_copy_type ==
1232                                 KVMPPC_VMX_COPY_BYTE)
1233                         kvmppc_set_vmx_byte(vcpu, gpr);
1234                 break;
1235 #endif
1236 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1237         case KVM_MMIO_REG_NESTED_GPR:
1238                 if (kvmppc_need_byteswap(vcpu))
1239                         gpr = swab64(gpr);
1240                 kvm_vcpu_write_guest(vcpu, vcpu->arch.nested_io_gpr, &gpr,
1241                                      sizeof(gpr));
1242                 break;
1243 #endif
1244         default:
1245                 BUG();
1246         }
1247 }
1248
1249 static int __kvmppc_handle_load(struct kvm_vcpu *vcpu,
1250                                 unsigned int rt, unsigned int bytes,
1251                                 int is_default_endian, int sign_extend)
1252 {
1253         struct kvm_run *run = vcpu->run;
1254         int idx, ret;
1255         bool host_swabbed;
1256
1257         /* Pity C doesn't have a logical XOR operator */
1258         if (kvmppc_need_byteswap(vcpu)) {
1259                 host_swabbed = is_default_endian;
1260         } else {
1261                 host_swabbed = !is_default_endian;
1262         }
1263
1264         if (bytes > sizeof(run->mmio.data))
1265                 return EMULATE_FAIL;
1266
1267         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1268         run->mmio.len = bytes;
1269         run->mmio.is_write = 0;
1270
1271         vcpu->arch.io_gpr = rt;
1272         vcpu->arch.mmio_host_swabbed = host_swabbed;
1273         vcpu->mmio_needed = 1;
1274         vcpu->mmio_is_write = 0;
1275         vcpu->arch.mmio_sign_extend = sign_extend;
1276
1277         idx = srcu_read_lock(&vcpu->kvm->srcu);
1278
1279         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1280                               bytes, &run->mmio.data);
1281
1282         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1283
1284         if (!ret) {
1285                 kvmppc_complete_mmio_load(vcpu);
1286                 vcpu->mmio_needed = 0;
1287                 return EMULATE_DONE;
1288         }
1289
1290         return EMULATE_DO_MMIO;
1291 }
1292
1293 int kvmppc_handle_load(struct kvm_vcpu *vcpu,
1294                        unsigned int rt, unsigned int bytes,
1295                        int is_default_endian)
1296 {
1297         return __kvmppc_handle_load(vcpu, rt, bytes, is_default_endian, 0);
1298 }
1299 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1300
1301 /* Same as above, but sign extends */
1302 int kvmppc_handle_loads(struct kvm_vcpu *vcpu,
1303                         unsigned int rt, unsigned int bytes,
1304                         int is_default_endian)
1305 {
1306         return __kvmppc_handle_load(vcpu, rt, bytes, is_default_endian, 1);
1307 }
1308
1309 #ifdef CONFIG_VSX
1310 int kvmppc_handle_vsx_load(struct kvm_vcpu *vcpu,
1311                         unsigned int rt, unsigned int bytes,
1312                         int is_default_endian, int mmio_sign_extend)
1313 {
1314         enum emulation_result emulated = EMULATE_DONE;
1315
1316         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1317         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1318                 return EMULATE_FAIL;
1319
1320         while (vcpu->arch.mmio_vsx_copy_nums) {
1321                 emulated = __kvmppc_handle_load(vcpu, rt, bytes,
1322                         is_default_endian, mmio_sign_extend);
1323
1324                 if (emulated != EMULATE_DONE)
1325                         break;
1326
1327                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1328
1329                 vcpu->arch.mmio_vsx_copy_nums--;
1330                 vcpu->arch.mmio_vsx_offset++;
1331         }
1332         return emulated;
1333 }
1334 #endif /* CONFIG_VSX */
1335
1336 int kvmppc_handle_store(struct kvm_vcpu *vcpu,
1337                         u64 val, unsigned int bytes, int is_default_endian)
1338 {
1339         struct kvm_run *run = vcpu->run;
1340         void *data = run->mmio.data;
1341         int idx, ret;
1342         bool host_swabbed;
1343
1344         /* Pity C doesn't have a logical XOR operator */
1345         if (kvmppc_need_byteswap(vcpu)) {
1346                 host_swabbed = is_default_endian;
1347         } else {
1348                 host_swabbed = !is_default_endian;
1349         }
1350
1351         if (bytes > sizeof(run->mmio.data))
1352                 return EMULATE_FAIL;
1353
1354         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1355         run->mmio.len = bytes;
1356         run->mmio.is_write = 1;
1357         vcpu->mmio_needed = 1;
1358         vcpu->mmio_is_write = 1;
1359
1360         if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1361                 val = dp_to_sp(val);
1362
1363         /* Store the value at the lowest bytes in 'data'. */
1364         if (!host_swabbed) {
1365                 switch (bytes) {
1366                 case 8: *(u64 *)data = val; break;
1367                 case 4: *(u32 *)data = val; break;
1368                 case 2: *(u16 *)data = val; break;
1369                 case 1: *(u8  *)data = val; break;
1370                 }
1371         } else {
1372                 switch (bytes) {
1373                 case 8: *(u64 *)data = swab64(val); break;
1374                 case 4: *(u32 *)data = swab32(val); break;
1375                 case 2: *(u16 *)data = swab16(val); break;
1376                 case 1: *(u8  *)data = val; break;
1377                 }
1378         }
1379
1380         idx = srcu_read_lock(&vcpu->kvm->srcu);
1381
1382         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1383                                bytes, &run->mmio.data);
1384
1385         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1386
1387         if (!ret) {
1388                 vcpu->mmio_needed = 0;
1389                 return EMULATE_DONE;
1390         }
1391
1392         return EMULATE_DO_MMIO;
1393 }
1394 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1395
1396 #ifdef CONFIG_VSX
1397 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1398 {
1399         u32 dword_offset, word_offset;
1400         union kvmppc_one_reg reg;
1401         int vsx_offset = 0;
1402         int copy_type = vcpu->arch.mmio_copy_type;
1403         int result = 0;
1404
1405         switch (copy_type) {
1406         case KVMPPC_VSX_COPY_DWORD:
1407                 vsx_offset =
1408                         kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1409
1410                 if (vsx_offset == -1) {
1411                         result = -1;
1412                         break;
1413                 }
1414
1415                 if (rs < 32) {
1416                         *val = kvmppc_get_vsx_fpr(vcpu, rs, vsx_offset);
1417                 } else {
1418                         kvmppc_get_vsx_vr(vcpu, rs - 32, &reg.vval);
1419                         *val = reg.vsxval[vsx_offset];
1420                 }
1421                 break;
1422
1423         case KVMPPC_VSX_COPY_WORD:
1424                 vsx_offset =
1425                         kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1426
1427                 if (vsx_offset == -1) {
1428                         result = -1;
1429                         break;
1430                 }
1431
1432                 if (rs < 32) {
1433                         dword_offset = vsx_offset / 2;
1434                         word_offset = vsx_offset % 2;
1435                         reg.vsxval[0] = kvmppc_get_vsx_fpr(vcpu, rs, dword_offset);
1436                         *val = reg.vsx32val[word_offset];
1437                 } else {
1438                         kvmppc_get_vsx_vr(vcpu, rs - 32, &reg.vval);
1439                         *val = reg.vsx32val[vsx_offset];
1440                 }
1441                 break;
1442
1443         default:
1444                 result = -1;
1445                 break;
1446         }
1447
1448         return result;
1449 }
1450
1451 int kvmppc_handle_vsx_store(struct kvm_vcpu *vcpu,
1452                         int rs, unsigned int bytes, int is_default_endian)
1453 {
1454         u64 val;
1455         enum emulation_result emulated = EMULATE_DONE;
1456
1457         vcpu->arch.io_gpr = rs;
1458
1459         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1460         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1461                 return EMULATE_FAIL;
1462
1463         while (vcpu->arch.mmio_vsx_copy_nums) {
1464                 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1465                         return EMULATE_FAIL;
1466
1467                 emulated = kvmppc_handle_store(vcpu,
1468                          val, bytes, is_default_endian);
1469
1470                 if (emulated != EMULATE_DONE)
1471                         break;
1472
1473                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1474
1475                 vcpu->arch.mmio_vsx_copy_nums--;
1476                 vcpu->arch.mmio_vsx_offset++;
1477         }
1478
1479         return emulated;
1480 }
1481
1482 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu)
1483 {
1484         struct kvm_run *run = vcpu->run;
1485         enum emulation_result emulated = EMULATE_FAIL;
1486         int r;
1487
1488         vcpu->arch.paddr_accessed += run->mmio.len;
1489
1490         if (!vcpu->mmio_is_write) {
1491                 emulated = kvmppc_handle_vsx_load(vcpu, vcpu->arch.io_gpr,
1492                          run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1493         } else {
1494                 emulated = kvmppc_handle_vsx_store(vcpu,
1495                          vcpu->arch.io_gpr, run->mmio.len, 1);
1496         }
1497
1498         switch (emulated) {
1499         case EMULATE_DO_MMIO:
1500                 run->exit_reason = KVM_EXIT_MMIO;
1501                 r = RESUME_HOST;
1502                 break;
1503         case EMULATE_FAIL:
1504                 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1505                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1506                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1507                 r = RESUME_HOST;
1508                 break;
1509         default:
1510                 r = RESUME_GUEST;
1511                 break;
1512         }
1513         return r;
1514 }
1515 #endif /* CONFIG_VSX */
1516
1517 #ifdef CONFIG_ALTIVEC
1518 int kvmppc_handle_vmx_load(struct kvm_vcpu *vcpu,
1519                 unsigned int rt, unsigned int bytes, int is_default_endian)
1520 {
1521         enum emulation_result emulated = EMULATE_DONE;
1522
1523         if (vcpu->arch.mmio_vmx_copy_nums > 2)
1524                 return EMULATE_FAIL;
1525
1526         while (vcpu->arch.mmio_vmx_copy_nums) {
1527                 emulated = __kvmppc_handle_load(vcpu, rt, bytes,
1528                                 is_default_endian, 0);
1529
1530                 if (emulated != EMULATE_DONE)
1531                         break;
1532
1533                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1534                 vcpu->arch.mmio_vmx_copy_nums--;
1535                 vcpu->arch.mmio_vmx_offset++;
1536         }
1537
1538         return emulated;
1539 }
1540
1541 static int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
1542 {
1543         union kvmppc_one_reg reg;
1544         int vmx_offset = 0;
1545         int result = 0;
1546
1547         vmx_offset =
1548                 kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1549
1550         if (vmx_offset == -1)
1551                 return -1;
1552
1553         kvmppc_get_vsx_vr(vcpu, index, &reg.vval);
1554         *val = reg.vsxval[vmx_offset];
1555
1556         return result;
1557 }
1558
1559 static int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
1560 {
1561         union kvmppc_one_reg reg;
1562         int vmx_offset = 0;
1563         int result = 0;
1564
1565         vmx_offset =
1566                 kvmppc_get_vmx_word_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1567
1568         if (vmx_offset == -1)
1569                 return -1;
1570
1571         kvmppc_get_vsx_vr(vcpu, index, &reg.vval);
1572         *val = reg.vsx32val[vmx_offset];
1573
1574         return result;
1575 }
1576
1577 static int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
1578 {
1579         union kvmppc_one_reg reg;
1580         int vmx_offset = 0;
1581         int result = 0;
1582
1583         vmx_offset =
1584                 kvmppc_get_vmx_hword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1585
1586         if (vmx_offset == -1)
1587                 return -1;
1588
1589         kvmppc_get_vsx_vr(vcpu, index, &reg.vval);
1590         *val = reg.vsx16val[vmx_offset];
1591
1592         return result;
1593 }
1594
1595 static int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
1596 {
1597         union kvmppc_one_reg reg;
1598         int vmx_offset = 0;
1599         int result = 0;
1600
1601         vmx_offset =
1602                 kvmppc_get_vmx_byte_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1603
1604         if (vmx_offset == -1)
1605                 return -1;
1606
1607         kvmppc_get_vsx_vr(vcpu, index, &reg.vval);
1608         *val = reg.vsx8val[vmx_offset];
1609
1610         return result;
1611 }
1612
1613 int kvmppc_handle_vmx_store(struct kvm_vcpu *vcpu,
1614                 unsigned int rs, unsigned int bytes, int is_default_endian)
1615 {
1616         u64 val = 0;
1617         unsigned int index = rs & KVM_MMIO_REG_MASK;
1618         enum emulation_result emulated = EMULATE_DONE;
1619
1620         if (vcpu->arch.mmio_vmx_copy_nums > 2)
1621                 return EMULATE_FAIL;
1622
1623         vcpu->arch.io_gpr = rs;
1624
1625         while (vcpu->arch.mmio_vmx_copy_nums) {
1626                 switch (vcpu->arch.mmio_copy_type) {
1627                 case KVMPPC_VMX_COPY_DWORD:
1628                         if (kvmppc_get_vmx_dword(vcpu, index, &val) == -1)
1629                                 return EMULATE_FAIL;
1630
1631                         break;
1632                 case KVMPPC_VMX_COPY_WORD:
1633                         if (kvmppc_get_vmx_word(vcpu, index, &val) == -1)
1634                                 return EMULATE_FAIL;
1635                         break;
1636                 case KVMPPC_VMX_COPY_HWORD:
1637                         if (kvmppc_get_vmx_hword(vcpu, index, &val) == -1)
1638                                 return EMULATE_FAIL;
1639                         break;
1640                 case KVMPPC_VMX_COPY_BYTE:
1641                         if (kvmppc_get_vmx_byte(vcpu, index, &val) == -1)
1642                                 return EMULATE_FAIL;
1643                         break;
1644                 default:
1645                         return EMULATE_FAIL;
1646                 }
1647
1648                 emulated = kvmppc_handle_store(vcpu, val, bytes,
1649                                 is_default_endian);
1650                 if (emulated != EMULATE_DONE)
1651                         break;
1652
1653                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1654                 vcpu->arch.mmio_vmx_copy_nums--;
1655                 vcpu->arch.mmio_vmx_offset++;
1656         }
1657
1658         return emulated;
1659 }
1660
1661 static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu)
1662 {
1663         struct kvm_run *run = vcpu->run;
1664         enum emulation_result emulated = EMULATE_FAIL;
1665         int r;
1666
1667         vcpu->arch.paddr_accessed += run->mmio.len;
1668
1669         if (!vcpu->mmio_is_write) {
1670                 emulated = kvmppc_handle_vmx_load(vcpu,
1671                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1672         } else {
1673                 emulated = kvmppc_handle_vmx_store(vcpu,
1674                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1675         }
1676
1677         switch (emulated) {
1678         case EMULATE_DO_MMIO:
1679                 run->exit_reason = KVM_EXIT_MMIO;
1680                 r = RESUME_HOST;
1681                 break;
1682         case EMULATE_FAIL:
1683                 pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
1684                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1685                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1686                 r = RESUME_HOST;
1687                 break;
1688         default:
1689                 r = RESUME_GUEST;
1690                 break;
1691         }
1692         return r;
1693 }
1694 #endif /* CONFIG_ALTIVEC */
1695
1696 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1697 {
1698         int r = 0;
1699         union kvmppc_one_reg val;
1700         int size;
1701
1702         size = one_reg_size(reg->id);
1703         if (size > sizeof(val))
1704                 return -EINVAL;
1705
1706         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1707         if (r == -EINVAL) {
1708                 r = 0;
1709                 switch (reg->id) {
1710 #ifdef CONFIG_ALTIVEC
1711                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1712                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1713                                 r = -ENXIO;
1714                                 break;
1715                         }
1716                         kvmppc_get_vsx_vr(vcpu, reg->id - KVM_REG_PPC_VR0, &val.vval);
1717                         break;
1718                 case KVM_REG_PPC_VSCR:
1719                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1720                                 r = -ENXIO;
1721                                 break;
1722                         }
1723                         val = get_reg_val(reg->id, kvmppc_get_vscr(vcpu));
1724                         break;
1725                 case KVM_REG_PPC_VRSAVE:
1726                         val = get_reg_val(reg->id, kvmppc_get_vrsave(vcpu));
1727                         break;
1728 #endif /* CONFIG_ALTIVEC */
1729                 default:
1730                         r = -EINVAL;
1731                         break;
1732                 }
1733         }
1734
1735         if (r)
1736                 return r;
1737
1738         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1739                 r = -EFAULT;
1740
1741         return r;
1742 }
1743
1744 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1745 {
1746         int r;
1747         union kvmppc_one_reg val;
1748         int size;
1749
1750         size = one_reg_size(reg->id);
1751         if (size > sizeof(val))
1752                 return -EINVAL;
1753
1754         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1755                 return -EFAULT;
1756
1757         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1758         if (r == -EINVAL) {
1759                 r = 0;
1760                 switch (reg->id) {
1761 #ifdef CONFIG_ALTIVEC
1762                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1763                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1764                                 r = -ENXIO;
1765                                 break;
1766                         }
1767                         kvmppc_set_vsx_vr(vcpu, reg->id - KVM_REG_PPC_VR0, &val.vval);
1768                         break;
1769                 case KVM_REG_PPC_VSCR:
1770                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1771                                 r = -ENXIO;
1772                                 break;
1773                         }
1774                         kvmppc_set_vscr(vcpu, set_reg_val(reg->id, val));
1775                         break;
1776                 case KVM_REG_PPC_VRSAVE:
1777                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1778                                 r = -ENXIO;
1779                                 break;
1780                         }
1781                         kvmppc_set_vrsave(vcpu, set_reg_val(reg->id, val));
1782                         break;
1783 #endif /* CONFIG_ALTIVEC */
1784                 default:
1785                         r = -EINVAL;
1786                         break;
1787                 }
1788         }
1789
1790         return r;
1791 }
1792
1793 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
1794 {
1795         struct kvm_run *run = vcpu->run;
1796         int r;
1797
1798         vcpu_load(vcpu);
1799
1800         if (vcpu->mmio_needed) {
1801                 vcpu->mmio_needed = 0;
1802                 if (!vcpu->mmio_is_write)
1803                         kvmppc_complete_mmio_load(vcpu);
1804 #ifdef CONFIG_VSX
1805                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1806                         vcpu->arch.mmio_vsx_copy_nums--;
1807                         vcpu->arch.mmio_vsx_offset++;
1808                 }
1809
1810                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1811                         r = kvmppc_emulate_mmio_vsx_loadstore(vcpu);
1812                         if (r == RESUME_HOST) {
1813                                 vcpu->mmio_needed = 1;
1814                                 goto out;
1815                         }
1816                 }
1817 #endif
1818 #ifdef CONFIG_ALTIVEC
1819                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1820                         vcpu->arch.mmio_vmx_copy_nums--;
1821                         vcpu->arch.mmio_vmx_offset++;
1822                 }
1823
1824                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1825                         r = kvmppc_emulate_mmio_vmx_loadstore(vcpu);
1826                         if (r == RESUME_HOST) {
1827                                 vcpu->mmio_needed = 1;
1828                                 goto out;
1829                         }
1830                 }
1831 #endif
1832         } else if (vcpu->arch.osi_needed) {
1833                 u64 *gprs = run->osi.gprs;
1834                 int i;
1835
1836                 for (i = 0; i < 32; i++)
1837                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1838                 vcpu->arch.osi_needed = 0;
1839         } else if (vcpu->arch.hcall_needed) {
1840                 int i;
1841
1842                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1843                 for (i = 0; i < 9; ++i)
1844                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1845                 vcpu->arch.hcall_needed = 0;
1846 #ifdef CONFIG_BOOKE
1847         } else if (vcpu->arch.epr_needed) {
1848                 kvmppc_set_epr(vcpu, run->epr.epr);
1849                 vcpu->arch.epr_needed = 0;
1850 #endif
1851         }
1852
1853         kvm_sigset_activate(vcpu);
1854
1855         if (!vcpu->wants_to_run)
1856                 r = -EINTR;
1857         else
1858                 r = kvmppc_vcpu_run(vcpu);
1859
1860         kvm_sigset_deactivate(vcpu);
1861
1862 #ifdef CONFIG_ALTIVEC
1863 out:
1864 #endif
1865
1866         /*
1867          * We're already returning to userspace, don't pass the
1868          * RESUME_HOST flags along.
1869          */
1870         if (r > 0)
1871                 r = 0;
1872
1873         vcpu_put(vcpu);
1874         return r;
1875 }
1876
1877 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1878 {
1879         if (irq->irq == KVM_INTERRUPT_UNSET) {
1880                 kvmppc_core_dequeue_external(vcpu);
1881                 return 0;
1882         }
1883
1884         kvmppc_core_queue_external(vcpu, irq);
1885
1886         kvm_vcpu_kick(vcpu);
1887
1888         return 0;
1889 }
1890
1891 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1892                                      struct kvm_enable_cap *cap)
1893 {
1894         int r;
1895
1896         if (cap->flags)
1897                 return -EINVAL;
1898
1899         switch (cap->cap) {
1900         case KVM_CAP_PPC_OSI:
1901                 r = 0;
1902                 vcpu->arch.osi_enabled = true;
1903                 break;
1904         case KVM_CAP_PPC_PAPR:
1905                 r = 0;
1906                 vcpu->arch.papr_enabled = true;
1907                 break;
1908         case KVM_CAP_PPC_EPR:
1909                 r = 0;
1910                 if (cap->args[0])
1911                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1912                 else
1913                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1914                 break;
1915 #ifdef CONFIG_BOOKE
1916         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1917                 r = 0;
1918                 vcpu->arch.watchdog_enabled = true;
1919                 break;
1920 #endif
1921 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1922         case KVM_CAP_SW_TLB: {
1923                 struct kvm_config_tlb cfg;
1924                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1925
1926                 r = -EFAULT;
1927                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1928                         break;
1929
1930                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1931                 break;
1932         }
1933 #endif
1934 #ifdef CONFIG_KVM_MPIC
1935         case KVM_CAP_IRQ_MPIC: {
1936                 struct fd f;
1937                 struct kvm_device *dev;
1938
1939                 r = -EBADF;
1940                 f = fdget(cap->args[0]);
1941                 if (!fd_file(f))
1942                         break;
1943
1944                 r = -EPERM;
1945                 dev = kvm_device_from_filp(fd_file(f));
1946                 if (dev)
1947                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1948
1949                 fdput(f);
1950                 break;
1951         }
1952 #endif
1953 #ifdef CONFIG_KVM_XICS
1954         case KVM_CAP_IRQ_XICS: {
1955                 struct fd f;
1956                 struct kvm_device *dev;
1957
1958                 r = -EBADF;
1959                 f = fdget(cap->args[0]);
1960                 if (!fd_file(f))
1961                         break;
1962
1963                 r = -EPERM;
1964                 dev = kvm_device_from_filp(fd_file(f));
1965                 if (dev) {
1966                         if (xics_on_xive())
1967                                 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1968                         else
1969                                 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1970                 }
1971
1972                 fdput(f);
1973                 break;
1974         }
1975 #endif /* CONFIG_KVM_XICS */
1976 #ifdef CONFIG_KVM_XIVE
1977         case KVM_CAP_PPC_IRQ_XIVE: {
1978                 struct fd f;
1979                 struct kvm_device *dev;
1980
1981                 r = -EBADF;
1982                 f = fdget(cap->args[0]);
1983                 if (!fd_file(f))
1984                         break;
1985
1986                 r = -ENXIO;
1987                 if (!xive_enabled()) {
1988                         fdput(f);
1989                         break;
1990                 }
1991
1992                 r = -EPERM;
1993                 dev = kvm_device_from_filp(fd_file(f));
1994                 if (dev)
1995                         r = kvmppc_xive_native_connect_vcpu(dev, vcpu,
1996                                                             cap->args[1]);
1997
1998                 fdput(f);
1999                 break;
2000         }
2001 #endif /* CONFIG_KVM_XIVE */
2002 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
2003         case KVM_CAP_PPC_FWNMI:
2004                 r = -EINVAL;
2005                 if (!is_kvmppc_hv_enabled(vcpu->kvm))
2006                         break;
2007                 r = 0;
2008                 vcpu->kvm->arch.fwnmi_enabled = true;
2009                 break;
2010 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
2011         default:
2012                 r = -EINVAL;
2013                 break;
2014         }
2015
2016         if (!r)
2017                 r = kvmppc_sanity_check(vcpu);
2018
2019         return r;
2020 }
2021
2022 bool kvm_arch_intc_initialized(struct kvm *kvm)
2023 {
2024 #ifdef CONFIG_KVM_MPIC
2025         if (kvm->arch.mpic)
2026                 return true;
2027 #endif
2028 #ifdef CONFIG_KVM_XICS
2029         if (kvm->arch.xics || kvm->arch.xive)
2030                 return true;
2031 #endif
2032         return false;
2033 }
2034
2035 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
2036                                     struct kvm_mp_state *mp_state)
2037 {
2038         return -EINVAL;
2039 }
2040
2041 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
2042                                     struct kvm_mp_state *mp_state)
2043 {
2044         return -EINVAL;
2045 }
2046
2047 long kvm_arch_vcpu_async_ioctl(struct file *filp,
2048                                unsigned int ioctl, unsigned long arg)
2049 {
2050         struct kvm_vcpu *vcpu = filp->private_data;
2051         void __user *argp = (void __user *)arg;
2052
2053         if (ioctl == KVM_INTERRUPT) {
2054                 struct kvm_interrupt irq;
2055                 if (copy_from_user(&irq, argp, sizeof(irq)))
2056                         return -EFAULT;
2057                 return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2058         }
2059         return -ENOIOCTLCMD;
2060 }
2061
2062 long kvm_arch_vcpu_ioctl(struct file *filp,
2063                          unsigned int ioctl, unsigned long arg)
2064 {
2065         struct kvm_vcpu *vcpu = filp->private_data;
2066         void __user *argp = (void __user *)arg;
2067         long r;
2068
2069         switch (ioctl) {
2070         case KVM_ENABLE_CAP:
2071         {
2072                 struct kvm_enable_cap cap;
2073                 r = -EFAULT;
2074                 if (copy_from_user(&cap, argp, sizeof(cap)))
2075                         goto out;
2076                 vcpu_load(vcpu);
2077                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
2078                 vcpu_put(vcpu);
2079                 break;
2080         }
2081
2082         case KVM_SET_ONE_REG:
2083         case KVM_GET_ONE_REG:
2084         {
2085                 struct kvm_one_reg reg;
2086                 r = -EFAULT;
2087                 if (copy_from_user(&reg, argp, sizeof(reg)))
2088                         goto out;
2089                 if (ioctl == KVM_SET_ONE_REG)
2090                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
2091                 else
2092                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
2093                 break;
2094         }
2095
2096 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
2097         case KVM_DIRTY_TLB: {
2098                 struct kvm_dirty_tlb dirty;
2099                 r = -EFAULT;
2100                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
2101                         goto out;
2102                 vcpu_load(vcpu);
2103                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
2104                 vcpu_put(vcpu);
2105                 break;
2106         }
2107 #endif
2108         default:
2109                 r = -EINVAL;
2110         }
2111
2112 out:
2113         return r;
2114 }
2115
2116 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2117 {
2118         return VM_FAULT_SIGBUS;
2119 }
2120
2121 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
2122 {
2123         u32 inst_nop = 0x60000000;
2124 #ifdef CONFIG_KVM_BOOKE_HV
2125         u32 inst_sc1 = 0x44000022;
2126         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
2127         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
2128         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
2129         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2130 #else
2131         u32 inst_lis = 0x3c000000;
2132         u32 inst_ori = 0x60000000;
2133         u32 inst_sc = 0x44000002;
2134         u32 inst_imm_mask = 0xffff;
2135
2136         /*
2137          * The hypercall to get into KVM from within guest context is as
2138          * follows:
2139          *
2140          *    lis r0, r0, KVM_SC_MAGIC_R0@h
2141          *    ori r0, KVM_SC_MAGIC_R0@l
2142          *    sc
2143          *    nop
2144          */
2145         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
2146         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
2147         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
2148         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2149 #endif
2150
2151         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
2152
2153         return 0;
2154 }
2155
2156 bool kvm_arch_irqchip_in_kernel(struct kvm *kvm)
2157 {
2158         int ret = 0;
2159
2160 #ifdef CONFIG_KVM_MPIC
2161         ret = ret || (kvm->arch.mpic != NULL);
2162 #endif
2163 #ifdef CONFIG_KVM_XICS
2164         ret = ret || (kvm->arch.xics != NULL);
2165         ret = ret || (kvm->arch.xive != NULL);
2166 #endif
2167         smp_rmb();
2168         return ret;
2169 }
2170
2171 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
2172                           bool line_status)
2173 {
2174         if (!kvm_arch_irqchip_in_kernel(kvm))
2175                 return -ENXIO;
2176
2177         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
2178                                         irq_event->irq, irq_event->level,
2179                                         line_status);
2180         return 0;
2181 }
2182
2183
2184 int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
2185                             struct kvm_enable_cap *cap)
2186 {
2187         int r;
2188
2189         if (cap->flags)
2190                 return -EINVAL;
2191
2192         switch (cap->cap) {
2193 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
2194         case KVM_CAP_PPC_ENABLE_HCALL: {
2195                 unsigned long hcall = cap->args[0];
2196
2197                 r = -EINVAL;
2198                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
2199                     cap->args[1] > 1)
2200                         break;
2201                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
2202                         break;
2203                 if (cap->args[1])
2204                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
2205                 else
2206                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
2207                 r = 0;
2208                 break;
2209         }
2210         case KVM_CAP_PPC_SMT: {
2211                 unsigned long mode = cap->args[0];
2212                 unsigned long flags = cap->args[1];
2213
2214                 r = -EINVAL;
2215                 if (kvm->arch.kvm_ops->set_smt_mode)
2216                         r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
2217                 break;
2218         }
2219
2220         case KVM_CAP_PPC_NESTED_HV:
2221                 r = -EINVAL;
2222                 if (!is_kvmppc_hv_enabled(kvm) ||
2223                     !kvm->arch.kvm_ops->enable_nested)
2224                         break;
2225                 r = kvm->arch.kvm_ops->enable_nested(kvm);
2226                 break;
2227 #endif
2228 #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
2229         case KVM_CAP_PPC_SECURE_GUEST:
2230                 r = -EINVAL;
2231                 if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_svm)
2232                         break;
2233                 r = kvm->arch.kvm_ops->enable_svm(kvm);
2234                 break;
2235         case KVM_CAP_PPC_DAWR1:
2236                 r = -EINVAL;
2237                 if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_dawr1)
2238                         break;
2239                 r = kvm->arch.kvm_ops->enable_dawr1(kvm);
2240                 break;
2241 #endif
2242         default:
2243                 r = -EINVAL;
2244                 break;
2245         }
2246
2247         return r;
2248 }
2249
2250 #ifdef CONFIG_PPC_BOOK3S_64
2251 /*
2252  * These functions check whether the underlying hardware is safe
2253  * against attacks based on observing the effects of speculatively
2254  * executed instructions, and whether it supplies instructions for
2255  * use in workarounds.  The information comes from firmware, either
2256  * via the device tree on powernv platforms or from an hcall on
2257  * pseries platforms.
2258  */
2259 #ifdef CONFIG_PPC_PSERIES
2260 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2261 {
2262         struct h_cpu_char_result c;
2263         unsigned long rc;
2264
2265         if (!machine_is(pseries))
2266                 return -ENOTTY;
2267
2268         rc = plpar_get_cpu_characteristics(&c);
2269         if (rc == H_SUCCESS) {
2270                 cp->character = c.character;
2271                 cp->behaviour = c.behaviour;
2272                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2273                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2274                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2275                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2276                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2277                         KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
2278                         KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
2279                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2280                         KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2281                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2282                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2283                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2284                         KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2285         }
2286         return 0;
2287 }
2288 #else
2289 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2290 {
2291         return -ENOTTY;
2292 }
2293 #endif
2294
2295 static inline bool have_fw_feat(struct device_node *fw_features,
2296                                 const char *state, const char *name)
2297 {
2298         struct device_node *np;
2299         bool r = false;
2300
2301         np = of_get_child_by_name(fw_features, name);
2302         if (np) {
2303                 r = of_property_read_bool(np, state);
2304                 of_node_put(np);
2305         }
2306         return r;
2307 }
2308
2309 static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2310 {
2311         struct device_node *np, *fw_features;
2312         int r;
2313
2314         memset(cp, 0, sizeof(*cp));
2315         r = pseries_get_cpu_char(cp);
2316         if (r != -ENOTTY)
2317                 return r;
2318
2319         np = of_find_node_by_name(NULL, "ibm,opal");
2320         if (np) {
2321                 fw_features = of_get_child_by_name(np, "fw-features");
2322                 of_node_put(np);
2323                 if (!fw_features)
2324                         return 0;
2325                 if (have_fw_feat(fw_features, "enabled",
2326                                  "inst-spec-barrier-ori31,31,0"))
2327                         cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31;
2328                 if (have_fw_feat(fw_features, "enabled",
2329                                  "fw-bcctrl-serialized"))
2330                         cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED;
2331                 if (have_fw_feat(fw_features, "enabled",
2332                                  "inst-l1d-flush-ori30,30,0"))
2333                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30;
2334                 if (have_fw_feat(fw_features, "enabled",
2335                                  "inst-l1d-flush-trig2"))
2336                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2;
2337                 if (have_fw_feat(fw_features, "enabled",
2338                                  "fw-l1d-thread-split"))
2339                         cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV;
2340                 if (have_fw_feat(fw_features, "enabled",
2341                                  "fw-count-cache-disabled"))
2342                         cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2343                 if (have_fw_feat(fw_features, "enabled",
2344                                  "fw-count-cache-flush-bcctr2,0,0"))
2345                         cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2346                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2347                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2348                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2349                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2350                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2351                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2352                         KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2353
2354                 if (have_fw_feat(fw_features, "enabled",
2355                                  "speculation-policy-favor-security"))
2356                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY;
2357                 if (!have_fw_feat(fw_features, "disabled",
2358                                   "needs-l1d-flush-msr-pr-0-to-1"))
2359                         cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR;
2360                 if (!have_fw_feat(fw_features, "disabled",
2361                                   "needs-spec-barrier-for-bound-checks"))
2362                         cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2363                 if (have_fw_feat(fw_features, "enabled",
2364                                  "needs-count-cache-flush-on-context-switch"))
2365                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2366                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2367                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2368                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2369                         KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2370
2371                 of_node_put(fw_features);
2372         }
2373
2374         return 0;
2375 }
2376 #endif
2377
2378 int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
2379 {
2380         struct kvm *kvm __maybe_unused = filp->private_data;
2381         void __user *argp = (void __user *)arg;
2382         int r;
2383
2384         switch (ioctl) {
2385         case KVM_PPC_GET_PVINFO: {
2386                 struct kvm_ppc_pvinfo pvinfo;
2387                 memset(&pvinfo, 0, sizeof(pvinfo));
2388                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
2389                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
2390                         r = -EFAULT;
2391                         goto out;
2392                 }
2393
2394                 break;
2395         }
2396 #ifdef CONFIG_SPAPR_TCE_IOMMU
2397         case KVM_CREATE_SPAPR_TCE_64: {
2398                 struct kvm_create_spapr_tce_64 create_tce_64;
2399
2400                 r = -EFAULT;
2401                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
2402                         goto out;
2403                 if (create_tce_64.flags) {
2404                         r = -EINVAL;
2405                         goto out;
2406                 }
2407                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2408                 goto out;
2409         }
2410         case KVM_CREATE_SPAPR_TCE: {
2411                 struct kvm_create_spapr_tce create_tce;
2412                 struct kvm_create_spapr_tce_64 create_tce_64;
2413
2414                 r = -EFAULT;
2415                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
2416                         goto out;
2417
2418                 create_tce_64.liobn = create_tce.liobn;
2419                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
2420                 create_tce_64.offset = 0;
2421                 create_tce_64.size = create_tce.window_size >>
2422                                 IOMMU_PAGE_SHIFT_4K;
2423                 create_tce_64.flags = 0;
2424                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2425                 goto out;
2426         }
2427 #endif
2428 #ifdef CONFIG_PPC_BOOK3S_64
2429         case KVM_PPC_GET_SMMU_INFO: {
2430                 struct kvm_ppc_smmu_info info;
2431                 struct kvm *kvm = filp->private_data;
2432
2433                 memset(&info, 0, sizeof(info));
2434                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2435                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2436                         r = -EFAULT;
2437                 break;
2438         }
2439         case KVM_PPC_RTAS_DEFINE_TOKEN: {
2440                 struct kvm *kvm = filp->private_data;
2441
2442                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
2443                 break;
2444         }
2445         case KVM_PPC_CONFIGURE_V3_MMU: {
2446                 struct kvm *kvm = filp->private_data;
2447                 struct kvm_ppc_mmuv3_cfg cfg;
2448
2449                 r = -EINVAL;
2450                 if (!kvm->arch.kvm_ops->configure_mmu)
2451                         goto out;
2452                 r = -EFAULT;
2453                 if (copy_from_user(&cfg, argp, sizeof(cfg)))
2454                         goto out;
2455                 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
2456                 break;
2457         }
2458         case KVM_PPC_GET_RMMU_INFO: {
2459                 struct kvm *kvm = filp->private_data;
2460                 struct kvm_ppc_rmmu_info info;
2461
2462                 r = -EINVAL;
2463                 if (!kvm->arch.kvm_ops->get_rmmu_info)
2464                         goto out;
2465                 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
2466                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2467                         r = -EFAULT;
2468                 break;
2469         }
2470         case KVM_PPC_GET_CPU_CHAR: {
2471                 struct kvm_ppc_cpu_char cpuchar;
2472
2473                 r = kvmppc_get_cpu_char(&cpuchar);
2474                 if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar)))
2475                         r = -EFAULT;
2476                 break;
2477         }
2478         case KVM_PPC_SVM_OFF: {
2479                 struct kvm *kvm = filp->private_data;
2480
2481                 r = 0;
2482                 if (!kvm->arch.kvm_ops->svm_off)
2483                         goto out;
2484
2485                 r = kvm->arch.kvm_ops->svm_off(kvm);
2486                 break;
2487         }
2488         default: {
2489                 struct kvm *kvm = filp->private_data;
2490                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
2491         }
2492 #else /* CONFIG_PPC_BOOK3S_64 */
2493         default:
2494                 r = -ENOTTY;
2495 #endif
2496         }
2497 out:
2498         return r;
2499 }
2500
2501 static DEFINE_IDA(lpid_inuse);
2502 static unsigned long nr_lpids;
2503
2504 long kvmppc_alloc_lpid(void)
2505 {
2506         int lpid;
2507
2508         /* The host LPID must always be 0 (allocation starts at 1) */
2509         lpid = ida_alloc_range(&lpid_inuse, 1, nr_lpids - 1, GFP_KERNEL);
2510         if (lpid < 0) {
2511                 if (lpid == -ENOMEM)
2512                         pr_err("%s: Out of memory\n", __func__);
2513                 else
2514                         pr_err("%s: No LPIDs free\n", __func__);
2515                 return -ENOMEM;
2516         }
2517
2518         return lpid;
2519 }
2520 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2521
2522 void kvmppc_free_lpid(long lpid)
2523 {
2524         ida_free(&lpid_inuse, lpid);
2525 }
2526 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2527
2528 /* nr_lpids_param includes the host LPID */
2529 void kvmppc_init_lpid(unsigned long nr_lpids_param)
2530 {
2531         nr_lpids = nr_lpids_param;
2532 }
2533 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2534
2535 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);
2536
2537 void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry)
2538 {
2539         if (vcpu->kvm->arch.kvm_ops->create_vcpu_debugfs)
2540                 vcpu->kvm->arch.kvm_ops->create_vcpu_debugfs(vcpu, debugfs_dentry);
2541 }
2542
2543 void kvm_arch_create_vm_debugfs(struct kvm *kvm)
2544 {
2545         if (kvm->arch.kvm_ops->create_vm_debugfs)
2546                 kvm->arch.kvm_ops->create_vm_debugfs(kvm);
2547 }