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