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
  36 #include "timing.h"
  37 #include "irq.h"
  38 #include "../mm/mmu_decl.h"
  39
  40 #define CREATE_TRACE_POINTS
  41 #include "trace.h"
  42
  43 struct kvmppc_ops *kvmppc_hv_ops;
  44 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
  45 struct kvmppc_ops *kvmppc_pr_ops;
  46 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
  47
  48
  49 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  50 {
  51         return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
  52 }
  53
  54 bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu)
  55 {
  56         return kvm_arch_vcpu_runnable(vcpu);
  57 }
  58
  59 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
  60 {
  61         return false;
  62 }
  63
  64 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  65 {
  66         return 1;
  67 }
  68
  69 /*
  70  * Common checks before entering the guest world.  Call with interrupts
  71  * disabled.
  72  *
  73  * returns:
  74  *
  75  * == 1 if we're ready to go into guest state
  76  * <= 0 if we need to go back to the host with return value
  77  */
  78 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
  79 {
  80         int r;
  81
  82         WARN_ON(irqs_disabled());
  83         hard_irq_disable();
  84
  85         while (true) {
  86                 if (need_resched()) {
  87                         local_irq_enable();
  88                         cond_resched();
  89                         hard_irq_disable();
  90                         continue;
  91                 }
  92
  93                 if (signal_pending(current)) {
  94                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
  95                         vcpu->run->exit_reason = KVM_EXIT_INTR;
  96                         r = -EINTR;
  97                         break;
  98                 }
  99
 100                 vcpu->mode = IN_GUEST_MODE;
 101
 102                 /*
 103                  * Reading vcpu->requests must happen after setting vcpu->mode,
 104                  * so we don't miss a request because the requester sees
 105                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
 106                  * before next entering the guest (and thus doesn't IPI).
 107                  * This also orders the write to mode from any reads
 108                  * to the page tables done while the VCPU is running.
 109                  * Please see the comment in kvm_flush_remote_tlbs.
 110                  */
 111                 smp_mb();
 112
 113                 if (kvm_request_pending(vcpu)) {
 114                         /* Make sure we process requests preemptable */
 115                         local_irq_enable();
 116                         trace_kvm_check_requests(vcpu);
 117                         r = kvmppc_core_check_requests(vcpu);
 118                         hard_irq_disable();
 119                         if (r > 0)
 120                                 continue;
 121                         break;
 122                 }
 123
 124                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 125                         /* interrupts got enabled in between, so we
 126                            are back at square 1 */
 127                         continue;
 128                 }
 129
 130                 guest_enter_irqoff();
 131                 return 1;
 132         }
 133
 134         /* return to host */
 135         local_irq_enable();
 136         return r;
 137 }
 138 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
 139
 140 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 141 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
 142 {
 143         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
 144         int i;
 145
 146         shared->sprg0 = swab64(shared->sprg0);
 147         shared->sprg1 = swab64(shared->sprg1);
 148         shared->sprg2 = swab64(shared->sprg2);
 149         shared->sprg3 = swab64(shared->sprg3);
 150         shared->srr0 = swab64(shared->srr0);
 151         shared->srr1 = swab64(shared->srr1);
 152         shared->dar = swab64(shared->dar);
 153         shared->msr = swab64(shared->msr);
 154         shared->dsisr = swab32(shared->dsisr);
 155         shared->int_pending = swab32(shared->int_pending);
 156         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
 157                 shared->sr[i] = swab32(shared->sr[i]);
 158 }
 159 #endif
 160
 161 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
 162 {
 163         int nr = kvmppc_get_gpr(vcpu, 11);
 164         int r;
 165         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
 166         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
 167         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
 168         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
 169         unsigned long r2 = 0;
 170
 171         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 172                 /* 32 bit mode */
 173                 param1 &= 0xffffffff;
 174                 param2 &= 0xffffffff;
 175                 param3 &= 0xffffffff;
 176                 param4 &= 0xffffffff;
 177         }
 178
 179         switch (nr) {
 180         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
 181         {
 182 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 183                 /* Book3S can be little endian, find it out here */
 184                 int shared_big_endian = true;
 185                 if (vcpu->arch.intr_msr & MSR_LE)
 186                         shared_big_endian = false;
 187                 if (shared_big_endian != vcpu->arch.shared_big_endian)
 188                         kvmppc_swab_shared(vcpu);
 189                 vcpu->arch.shared_big_endian = shared_big_endian;
 190 #endif
 191
 192                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
 193                         /*
 194                          * Older versions of the Linux magic page code had
 195                          * a bug where they would map their trampoline code
 196                          * NX. If that's the case, remove !PR NX capability.
 197                          */
 198                         vcpu->arch.disable_kernel_nx = true;
 199                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 200                 }
 201
 202                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
 203                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
 204
 205 #ifdef CONFIG_PPC_64K_PAGES
 206                 /*
 207                  * Make sure our 4k magic page is in the same window of a 64k
 208                  * page within the guest and within the host's page.
 209                  */
 210                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
 211                     ((ulong)vcpu->arch.shared & 0xf000)) {
 212                         void *old_shared = vcpu->arch.shared;
 213                         ulong shared = (ulong)vcpu->arch.shared;
 214                         void *new_shared;
 215
 216                         shared &= PAGE_MASK;
 217                         shared |= vcpu->arch.magic_page_pa & 0xf000;
 218                         new_shared = (void*)shared;
 219                         memcpy(new_shared, old_shared, 0x1000);
 220                         vcpu->arch.shared = new_shared;
 221                 }
 222 #endif
 223
 224                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
 225
 226                 r = EV_SUCCESS;
 227                 break;
 228         }
 229         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
 230                 r = EV_SUCCESS;
 231 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
 232                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
 233 #endif
 234
 235                 /* Second return value is in r4 */
 236                 break;
 237         case EV_HCALL_TOKEN(EV_IDLE):
 238                 r = EV_SUCCESS;
 239                 kvm_vcpu_block(vcpu);
 240                 kvm_clear_request(KVM_REQ_UNHALT, 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                 u32 last_inst;
 308
 309                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
 310                 /* XXX Deliver Program interrupt to guest. */
 311                 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
 312                 r = RESUME_HOST;
 313                 break;
 314         }
 315         default:
 316                 WARN_ON(1);
 317                 r = RESUME_GUEST;
 318         }
 319
 320         return r;
 321 }
 322 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
 323
 324 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 325               bool data)
 326 {
 327         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 328         struct kvmppc_pte pte;
 329         int r = -EINVAL;
 330
 331         vcpu->stat.st++;
 332
 333         if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->store_to_eaddr)
 334                 r = vcpu->kvm->arch.kvm_ops->store_to_eaddr(vcpu, eaddr, ptr,
 335                                                             size);
 336
 337         if ((!r) || (r == -EAGAIN))
 338                 return r;
 339
 340         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 341                          XLATE_WRITE, &pte);
 342         if (r < 0)
 343                 return r;
 344
 345         *eaddr = pte.raddr;
 346
 347         if (!pte.may_write)
 348                 return -EPERM;
 349
 350         /* Magic page override */
 351         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 352             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 353             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 354                 void *magic = vcpu->arch.shared;
 355                 magic += pte.eaddr & 0xfff;
 356                 memcpy(magic, ptr, size);
 357                 return EMULATE_DONE;
 358         }
 359
 360         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 361                 return EMULATE_DO_MMIO;
 362
 363         return EMULATE_DONE;
 364 }
 365 EXPORT_SYMBOL_GPL(kvmppc_st);
 366
 367 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 368                       bool data)
 369 {
 370         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 371         struct kvmppc_pte pte;
 372         int rc = -EINVAL;
 373
 374         vcpu->stat.ld++;
 375
 376         if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->load_from_eaddr)
 377                 rc = vcpu->kvm->arch.kvm_ops->load_from_eaddr(vcpu, eaddr, ptr,
 378                                                               size);
 379
 380         if ((!rc) || (rc == -EAGAIN))
 381                 return rc;
 382
 383         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 384                           XLATE_READ, &pte);
 385         if (rc)
 386                 return rc;
 387
 388         *eaddr = pte.raddr;
 389
 390         if (!pte.may_read)
 391                 return -EPERM;
 392
 393         if (!data && !pte.may_execute)
 394                 return -ENOEXEC;
 395
 396         /* Magic page override */
 397         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 398             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 399             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 400                 void *magic = vcpu->arch.shared;
 401                 magic += pte.eaddr & 0xfff;
 402                 memcpy(ptr, magic, size);
 403                 return EMULATE_DONE;
 404         }
 405
 406         vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 407         rc = kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size);
 408         srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
 409         if (rc)
 410                 return EMULATE_DO_MMIO;
 411
 412         return EMULATE_DONE;
 413 }
 414 EXPORT_SYMBOL_GPL(kvmppc_ld);
 415
 416 int kvm_arch_hardware_enable(void)
 417 {
 418         return 0;
 419 }
 420
 421 int kvm_arch_hardware_setup(void *opaque)
 422 {
 423         return 0;
 424 }
 425
 426 int kvm_arch_check_processor_compat(void *opaque)
 427 {
 428         return kvmppc_core_check_processor_compat();
 429 }
 430
 431 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 432 {
 433         struct kvmppc_ops *kvm_ops = NULL;
 434         /*
 435          * if we have both HV and PR enabled, default is HV
 436          */
 437         if (type == 0) {
 438                 if (kvmppc_hv_ops)
 439                         kvm_ops = kvmppc_hv_ops;
 440                 else
 441                         kvm_ops = kvmppc_pr_ops;
 442                 if (!kvm_ops)
 443                         goto err_out;
 444         } else  if (type == KVM_VM_PPC_HV) {
 445                 if (!kvmppc_hv_ops)
 446                         goto err_out;
 447                 kvm_ops = kvmppc_hv_ops;
 448         } else if (type == KVM_VM_PPC_PR) {
 449                 if (!kvmppc_pr_ops)
 450                         goto err_out;
 451                 kvm_ops = kvmppc_pr_ops;
 452         } else
 453                 goto err_out;
 454
 455         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
 456                 return -ENOENT;
 457
 458         kvm->arch.kvm_ops = kvm_ops;
 459         return kvmppc_core_init_vm(kvm);
 460 err_out:
 461         return -EINVAL;
 462 }
 463
 464 void kvm_arch_destroy_vm(struct kvm *kvm)
 465 {
 466         unsigned int i;
 467         struct kvm_vcpu *vcpu;
 468
 469 #ifdef CONFIG_KVM_XICS
 470         /*
 471          * We call kick_all_cpus_sync() to ensure that all
 472          * CPUs have executed any pending IPIs before we
 473          * continue and free VCPUs structures below.
 474          */
 475         if (is_kvmppc_hv_enabled(kvm))
 476                 kick_all_cpus_sync();
 477 #endif
 478
 479         kvm_for_each_vcpu(i, vcpu, kvm)
 480                 kvm_vcpu_destroy(vcpu);
 481
 482         mutex_lock(&kvm->lock);
 483         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 484                 kvm->vcpus[i] = NULL;
 485
 486         atomic_set(&kvm->online_vcpus, 0);
 487
 488         kvmppc_core_destroy_vm(kvm);
 489
 490         mutex_unlock(&kvm->lock);
 491
 492         /* drop the module reference */
 493         module_put(kvm->arch.kvm_ops->owner);
 494 }
 495
 496 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 497 {
 498         int r;
 499         /* Assume we're using HV mode when the HV module is loaded */
 500         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 501
 502         if (kvm) {
 503                 /*
 504                  * Hooray - we know which VM type we're running on. Depend on
 505                  * that rather than the guess above.
 506                  */
 507                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 508         }
 509
 510         switch (ext) {
 511 #ifdef CONFIG_BOOKE
 512         case KVM_CAP_PPC_BOOKE_SREGS:
 513         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 514         case KVM_CAP_PPC_EPR:
 515 #else
 516         case KVM_CAP_PPC_SEGSTATE:
 517         case KVM_CAP_PPC_HIOR:
 518         case KVM_CAP_PPC_PAPR:
 519 #endif
 520         case KVM_CAP_PPC_UNSET_IRQ:
 521         case KVM_CAP_PPC_IRQ_LEVEL:
 522         case KVM_CAP_ENABLE_CAP:
 523         case KVM_CAP_ONE_REG:
 524         case KVM_CAP_IOEVENTFD:
 525         case KVM_CAP_DEVICE_CTRL:
 526         case KVM_CAP_IMMEDIATE_EXIT:
 527         case KVM_CAP_SET_GUEST_DEBUG:
 528                 r = 1;
 529                 break;
 530         case KVM_CAP_PPC_GUEST_DEBUG_SSTEP:
 531         case KVM_CAP_PPC_PAIRED_SINGLES:
 532         case KVM_CAP_PPC_OSI:
 533         case KVM_CAP_PPC_GET_PVINFO:
 534 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 535         case KVM_CAP_SW_TLB:
 536 #endif
 537                 /* We support this only for PR */
 538                 r = !hv_enabled;
 539                 break;
 540 #ifdef CONFIG_KVM_MPIC
 541         case KVM_CAP_IRQ_MPIC:
 542                 r = 1;
 543                 break;
 544 #endif
 545
 546 #ifdef CONFIG_PPC_BOOK3S_64
 547         case KVM_CAP_SPAPR_TCE:
 548         case KVM_CAP_SPAPR_TCE_64:
 549                 r = 1;
 550                 break;
 551         case KVM_CAP_SPAPR_TCE_VFIO:
 552                 r = !!cpu_has_feature(CPU_FTR_HVMODE);
 553                 break;
 554         case KVM_CAP_PPC_RTAS:
 555         case KVM_CAP_PPC_FIXUP_HCALL:
 556         case KVM_CAP_PPC_ENABLE_HCALL:
 557 #ifdef CONFIG_KVM_XICS
 558         case KVM_CAP_IRQ_XICS:
 559 #endif
 560         case KVM_CAP_PPC_GET_CPU_CHAR:
 561                 r = 1;
 562                 break;
 563 #ifdef CONFIG_KVM_XIVE
 564         case KVM_CAP_PPC_IRQ_XIVE:
 565                 /*
 566                  * We need XIVE to be enabled on the platform (implies
 567                  * a POWER9 processor) and the PowerNV platform, as
 568                  * nested is not yet supported.
 569                  */
 570                 r = xive_enabled() && !!cpu_has_feature(CPU_FTR_HVMODE) &&
 571                         kvmppc_xive_native_supported();
 572                 break;
 573 #endif
 574
 575         case KVM_CAP_PPC_ALLOC_HTAB:
 576                 r = hv_enabled;
 577                 break;
 578 #endif /* CONFIG_PPC_BOOK3S_64 */
 579 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 580         case KVM_CAP_PPC_SMT:
 581                 r = 0;
 582                 if (kvm) {
 583                         if (kvm->arch.emul_smt_mode > 1)
 584                                 r = kvm->arch.emul_smt_mode;
 585                         else
 586                                 r = kvm->arch.smt_mode;
 587                 } else if (hv_enabled) {
 588                         if (cpu_has_feature(CPU_FTR_ARCH_300))
 589                                 r = 1;
 590                         else
 591                                 r = threads_per_subcore;
 592                 }
 593                 break;
 594         case KVM_CAP_PPC_SMT_POSSIBLE:
 595                 r = 1;
 596                 if (hv_enabled) {
 597                         if (!cpu_has_feature(CPU_FTR_ARCH_300))
 598                                 r = ((threads_per_subcore << 1) - 1);
 599                         else
 600                                 /* P9 can emulate dbells, so allow any mode */
 601                                 r = 8 | 4 | 2 | 1;
 602                 }
 603                 break;
 604         case KVM_CAP_PPC_RMA:
 605                 r = 0;
 606                 break;
 607         case KVM_CAP_PPC_HWRNG:
 608                 r = kvmppc_hwrng_present();
 609                 break;
 610         case KVM_CAP_PPC_MMU_RADIX:
 611                 r = !!(hv_enabled && radix_enabled());
 612                 break;
 613         case KVM_CAP_PPC_MMU_HASH_V3:
 614                 r = !!(hv_enabled && cpu_has_feature(CPU_FTR_ARCH_300) &&
 615                        cpu_has_feature(CPU_FTR_HVMODE));
 616                 break;
 617         case KVM_CAP_PPC_NESTED_HV:
 618                 r = !!(hv_enabled && kvmppc_hv_ops->enable_nested &&
 619                        !kvmppc_hv_ops->enable_nested(NULL));
 620                 break;
 621 #endif
 622         case KVM_CAP_SYNC_MMU:
 623 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 624                 r = hv_enabled;
 625 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 626                 r = 1;
 627 #else
 628                 r = 0;
 629 #endif
 630                 break;
 631 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 632         case KVM_CAP_PPC_HTAB_FD:
 633                 r = hv_enabled;
 634                 break;
 635 #endif
 636         case KVM_CAP_NR_VCPUS:
 637                 /*
 638                  * Recommending a number of CPUs is somewhat arbitrary; we
 639                  * return the number of present CPUs for -HV (since a host
 640                  * will have secondary threads "offline"), and for other KVM
 641                  * implementations just count online CPUs.
 642                  */
 643                 if (hv_enabled)
 644                         r = num_present_cpus();
 645                 else
 646                         r = num_online_cpus();
 647                 break;
 648         case KVM_CAP_MAX_VCPUS:
 649                 r = KVM_MAX_VCPUS;
 650                 break;
 651         case KVM_CAP_MAX_VCPU_ID:
 652                 r = KVM_MAX_VCPU_ID;
 653                 break;
 654 #ifdef CONFIG_PPC_BOOK3S_64
 655         case KVM_CAP_PPC_GET_SMMU_INFO:
 656                 r = 1;
 657                 break;
 658         case KVM_CAP_SPAPR_MULTITCE:
 659                 r = 1;
 660                 break;
 661         case KVM_CAP_SPAPR_RESIZE_HPT:
 662                 r = !!hv_enabled;
 663                 break;
 664 #endif
 665 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 666         case KVM_CAP_PPC_FWNMI:
 667                 r = hv_enabled;
 668                 break;
 669 #endif
 670 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 671         case KVM_CAP_PPC_HTM:
 672                 r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
 673                      (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
 674                 break;
 675 #endif
 676 #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
 677         case KVM_CAP_PPC_SECURE_GUEST:
 678                 r = hv_enabled && kvmppc_hv_ops->enable_svm &&
 679                         !kvmppc_hv_ops->enable_svm(NULL);
 680                 break;
 681         case KVM_CAP_PPC_DAWR1:
 682                 r = !!(hv_enabled && kvmppc_hv_ops->enable_dawr1 &&
 683                        !kvmppc_hv_ops->enable_dawr1(NULL));
 684                 break;
 685 #endif
 686         default:
 687                 r = 0;
 688                 break;
 689         }
 690         return r;
 691
 692 }
 693
 694 long kvm_arch_dev_ioctl(struct file *filp,
 695                         unsigned int ioctl, unsigned long arg)
 696 {
 697         return -EINVAL;
 698 }
 699
 700 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
 701 {
 702         kvmppc_core_free_memslot(kvm, slot);
 703 }
 704
 705 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 706                                    struct kvm_memory_slot *memslot,
 707                                    const struct kvm_userspace_memory_region *mem,
 708                                    enum kvm_mr_change change)
 709 {
 710         return kvmppc_core_prepare_memory_region(kvm, memslot, mem, change);
 711 }
 712
 713 void kvm_arch_commit_memory_region(struct kvm *kvm,
 714                                    const struct kvm_userspace_memory_region *mem,
 715                                    struct kvm_memory_slot *old,
 716                                    const struct kvm_memory_slot *new,
 717                                    enum kvm_mr_change change)
 718 {
 719         kvmppc_core_commit_memory_region(kvm, mem, old, new, change);
 720 }
 721
 722 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 723                                    struct kvm_memory_slot *slot)
 724 {
 725         kvmppc_core_flush_memslot(kvm, slot);
 726 }
 727
 728 int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
 729 {
 730         return 0;
 731 }
 732
 733 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 734 {
 735         struct kvm_vcpu *vcpu;
 736
 737         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 738         kvmppc_decrementer_func(vcpu);
 739
 740         return HRTIMER_NORESTART;
 741 }
 742
 743 int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 744 {
 745         int err;
 746
 747         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 748         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 749         vcpu->arch.dec_expires = get_tb();
 750
 751 #ifdef CONFIG_KVM_EXIT_TIMING
 752         mutex_init(&vcpu->arch.exit_timing_lock);
 753 #endif
 754         err = kvmppc_subarch_vcpu_init(vcpu);
 755         if (err)
 756                 return err;
 757
 758         err = kvmppc_core_vcpu_create(vcpu);
 759         if (err)
 760                 goto out_vcpu_uninit;
 761
 762         vcpu->arch.waitp = &vcpu->wait;
 763         kvmppc_create_vcpu_debugfs(vcpu, vcpu->vcpu_id);
 764         return 0;
 765
 766 out_vcpu_uninit:
 767         kvmppc_subarch_vcpu_uninit(vcpu);
 768         return err;
 769 }
 770
 771 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 772 {
 773 }
 774
 775 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 776 {
 777         /* Make sure we're not using the vcpu anymore */
 778         hrtimer_cancel(&vcpu->arch.dec_timer);
 779
 780         kvmppc_remove_vcpu_debugfs(vcpu);
 781
 782         switch (vcpu->arch.irq_type) {
 783         case KVMPPC_IRQ_MPIC:
 784                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 785                 break;
 786         case KVMPPC_IRQ_XICS:
 787                 if (xics_on_xive())
 788                         kvmppc_xive_cleanup_vcpu(vcpu);
 789                 else
 790                         kvmppc_xics_free_icp(vcpu);
 791                 break;
 792         case KVMPPC_IRQ_XIVE:
 793                 kvmppc_xive_native_cleanup_vcpu(vcpu);
 794                 break;
 795         }
 796
 797         kvmppc_core_vcpu_free(vcpu);
 798
 799         kvmppc_subarch_vcpu_uninit(vcpu);
 800 }
 801
 802 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 803 {
 804         return kvmppc_core_pending_dec(vcpu);
 805 }
 806
 807 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 808 {
 809 #ifdef CONFIG_BOOKE
 810         /*
 811          * vrsave (formerly usprg0) isn't used by Linux, but may
 812          * be used by the guest.
 813          *
 814          * On non-booke this is associated with Altivec and
 815          * is handled by code in book3s.c.
 816          */
 817         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 818 #endif
 819         kvmppc_core_vcpu_load(vcpu, cpu);
 820 }
 821
 822 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 823 {
 824         kvmppc_core_vcpu_put(vcpu);
 825 #ifdef CONFIG_BOOKE
 826         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 827 #endif
 828 }
 829
 830 /*
 831  * irq_bypass_add_producer and irq_bypass_del_producer are only
 832  * useful if the architecture supports PCI passthrough.
 833  * irq_bypass_stop and irq_bypass_start are not needed and so
 834  * kvm_ops are not defined for them.
 835  */
 836 bool kvm_arch_has_irq_bypass(void)
 837 {
 838         return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
 839                 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
 840 }
 841
 842 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
 843                                      struct irq_bypass_producer *prod)
 844 {
 845         struct kvm_kernel_irqfd *irqfd =
 846                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 847         struct kvm *kvm = irqfd->kvm;
 848
 849         if (kvm->arch.kvm_ops->irq_bypass_add_producer)
 850                 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
 851
 852         return 0;
 853 }
 854
 855 void kvm_arch_irq_bypass_del_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_del_producer)
 863                 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
 864 }
 865
 866 #ifdef CONFIG_VSX
 867 static inline int kvmppc_get_vsr_dword_offset(int index)
 868 {
 869         int offset;
 870
 871         if ((index != 0) && (index != 1))
 872                 return -1;
 873
 874 #ifdef __BIG_ENDIAN
 875         offset =  index;
 876 #else
 877         offset = 1 - index;
 878 #endif
 879
 880         return offset;
 881 }
 882
 883 static inline int kvmppc_get_vsr_word_offset(int index)
 884 {
 885         int offset;
 886
 887         if ((index > 3) || (index < 0))
 888                 return -1;
 889
 890 #ifdef __BIG_ENDIAN
 891         offset = index;
 892 #else
 893         offset = 3 - index;
 894 #endif
 895         return offset;
 896 }
 897
 898 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
 899         u64 gpr)
 900 {
 901         union kvmppc_one_reg val;
 902         int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
 903         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 904
 905         if (offset == -1)
 906                 return;
 907
 908         if (index >= 32) {
 909                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 910                 val.vsxval[offset] = gpr;
 911                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 912         } else {
 913                 VCPU_VSX_FPR(vcpu, index, offset) = gpr;
 914         }
 915 }
 916
 917 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
 918         u64 gpr)
 919 {
 920         union kvmppc_one_reg val;
 921         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 922
 923         if (index >= 32) {
 924                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 925                 val.vsxval[0] = gpr;
 926                 val.vsxval[1] = gpr;
 927                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 928         } else {
 929                 VCPU_VSX_FPR(vcpu, index, 0) = gpr;
 930                 VCPU_VSX_FPR(vcpu, index, 1) = gpr;
 931         }
 932 }
 933
 934 static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
 935         u32 gpr)
 936 {
 937         union kvmppc_one_reg val;
 938         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 939
 940         if (index >= 32) {
 941                 val.vsx32val[0] = gpr;
 942                 val.vsx32val[1] = gpr;
 943                 val.vsx32val[2] = gpr;
 944                 val.vsx32val[3] = gpr;
 945                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 946         } else {
 947                 val.vsx32val[0] = gpr;
 948                 val.vsx32val[1] = gpr;
 949                 VCPU_VSX_FPR(vcpu, index, 0) = val.vsxval[0];
 950                 VCPU_VSX_FPR(vcpu, index, 1) = val.vsxval[0];
 951         }
 952 }
 953
 954 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
 955         u32 gpr32)
 956 {
 957         union kvmppc_one_reg val;
 958         int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
 959         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 960         int dword_offset, word_offset;
 961
 962         if (offset == -1)
 963                 return;
 964
 965         if (index >= 32) {
 966                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 967                 val.vsx32val[offset] = gpr32;
 968                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 969         } else {
 970                 dword_offset = offset / 2;
 971                 word_offset = offset % 2;
 972                 val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
 973                 val.vsx32val[word_offset] = gpr32;
 974                 VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
 975         }
 976 }
 977 #endif /* CONFIG_VSX */
 978
 979 #ifdef CONFIG_ALTIVEC
 980 static inline int kvmppc_get_vmx_offset_generic(struct kvm_vcpu *vcpu,
 981                 int index, int element_size)
 982 {
 983         int offset;
 984         int elts = sizeof(vector128)/element_size;
 985
 986         if ((index < 0) || (index >= elts))
 987                 return -1;
 988
 989         if (kvmppc_need_byteswap(vcpu))
 990                 offset = elts - index - 1;
 991         else
 992                 offset = index;
 993
 994         return offset;
 995 }
 996
 997 static inline int kvmppc_get_vmx_dword_offset(struct kvm_vcpu *vcpu,
 998                 int index)
 999 {
1000         return kvmppc_get_vmx_offset_generic(vcpu, index, 8);
1001 }
1002
1003 static inline int kvmppc_get_vmx_word_offset(struct kvm_vcpu *vcpu,
1004                 int index)
1005 {
1006         return kvmppc_get_vmx_offset_generic(vcpu, index, 4);
1007 }
1008
1009 static inline int kvmppc_get_vmx_hword_offset(struct kvm_vcpu *vcpu,
1010                 int index)
1011 {
1012         return kvmppc_get_vmx_offset_generic(vcpu, index, 2);
1013 }
1014
1015 static inline int kvmppc_get_vmx_byte_offset(struct kvm_vcpu *vcpu,
1016                 int index)
1017 {
1018         return kvmppc_get_vmx_offset_generic(vcpu, index, 1);
1019 }
1020
1021
1022 static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
1023         u64 gpr)
1024 {
1025         union kvmppc_one_reg val;
1026         int offset = kvmppc_get_vmx_dword_offset(vcpu,
1027                         vcpu->arch.mmio_vmx_offset);
1028         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1029
1030         if (offset == -1)
1031                 return;
1032
1033         val.vval = VCPU_VSX_VR(vcpu, index);
1034         val.vsxval[offset] = gpr;
1035         VCPU_VSX_VR(vcpu, index) = val.vval;
1036 }
1037
1038 static inline void kvmppc_set_vmx_word(struct kvm_vcpu *vcpu,
1039         u32 gpr32)
1040 {
1041         union kvmppc_one_reg val;
1042         int offset = kvmppc_get_vmx_word_offset(vcpu,
1043                         vcpu->arch.mmio_vmx_offset);
1044         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1045
1046         if (offset == -1)
1047                 return;
1048
1049         val.vval = VCPU_VSX_VR(vcpu, index);
1050         val.vsx32val[offset] = gpr32;
1051         VCPU_VSX_VR(vcpu, index) = val.vval;
1052 }
1053
1054 static inline void kvmppc_set_vmx_hword(struct kvm_vcpu *vcpu,
1055         u16 gpr16)
1056 {
1057         union kvmppc_one_reg val;
1058         int offset = kvmppc_get_vmx_hword_offset(vcpu,
1059                         vcpu->arch.mmio_vmx_offset);
1060         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1061
1062         if (offset == -1)
1063                 return;
1064
1065         val.vval = VCPU_VSX_VR(vcpu, index);
1066         val.vsx16val[offset] = gpr16;
1067         VCPU_VSX_VR(vcpu, index) = val.vval;
1068 }
1069
1070 static inline void kvmppc_set_vmx_byte(struct kvm_vcpu *vcpu,
1071         u8 gpr8)
1072 {
1073         union kvmppc_one_reg val;
1074         int offset = kvmppc_get_vmx_byte_offset(vcpu,
1075                         vcpu->arch.mmio_vmx_offset);
1076         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1077
1078         if (offset == -1)
1079                 return;
1080
1081         val.vval = VCPU_VSX_VR(vcpu, index);
1082         val.vsx8val[offset] = gpr8;
1083         VCPU_VSX_VR(vcpu, index) = val.vval;
1084 }
1085 #endif /* CONFIG_ALTIVEC */
1086
1087 #ifdef CONFIG_PPC_FPU
1088 static inline u64 sp_to_dp(u32 fprs)
1089 {
1090         u64 fprd;
1091
1092         preempt_disable();
1093         enable_kernel_fp();
1094         asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m"UPD_CONSTR (fprd) : "m"UPD_CONSTR (fprs)
1095              : "fr0");
1096         preempt_enable();
1097         return fprd;
1098 }
1099
1100 static inline u32 dp_to_sp(u64 fprd)
1101 {
1102         u32 fprs;
1103
1104         preempt_disable();
1105         enable_kernel_fp();
1106         asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m"UPD_CONSTR (fprs) : "m"UPD_CONSTR (fprd)
1107              : "fr0");
1108         preempt_enable();
1109         return fprs;
1110 }
1111
1112 #else
1113 #define sp_to_dp(x)     (x)
1114 #define dp_to_sp(x)     (x)
1115 #endif /* CONFIG_PPC_FPU */
1116
1117 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu)
1118 {
1119         struct kvm_run *run = vcpu->run;
1120         u64 gpr;
1121
1122         if (run->mmio.len > sizeof(gpr)) {
1123                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
1124                 return;
1125         }
1126
1127         if (!vcpu->arch.mmio_host_swabbed) {
1128                 switch (run->mmio.len) {
1129                 case 8: gpr = *(u64 *)run->mmio.data; break;
1130                 case 4: gpr = *(u32 *)run->mmio.data; break;
1131                 case 2: gpr = *(u16 *)run->mmio.data; break;
1132                 case 1: gpr = *(u8 *)run->mmio.data; break;
1133                 }
1134         } else {
1135                 switch (run->mmio.len) {
1136                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
1137                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
1138                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
1139                 case 1: gpr = *(u8 *)run->mmio.data; break;
1140                 }
1141         }
1142
1143         /* conversion between single and double precision */
1144         if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
1145                 gpr = sp_to_dp(gpr);
1146
1147         if (vcpu->arch.mmio_sign_extend) {
1148                 switch (run->mmio.len) {
1149 #ifdef CONFIG_PPC64
1150                 case 4:
1151                         gpr = (s64)(s32)gpr;
1152                         break;
1153 #endif
1154                 case 2:
1155                         gpr = (s64)(s16)gpr;
1156                         break;
1157                 case 1:
1158                         gpr = (s64)(s8)gpr;
1159                         break;
1160                 }
1161         }
1162
1163         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1164         case KVM_MMIO_REG_GPR:
1165                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1166                 break;
1167         case KVM_MMIO_REG_FPR:
1168                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1169                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);
1170
1171                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1172                 break;
1173 #ifdef CONFIG_PPC_BOOK3S
1174         case KVM_MMIO_REG_QPR:
1175                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1176                 break;
1177         case KVM_MMIO_REG_FQPR:
1178                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1179                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1180                 break;
1181 #endif
1182 #ifdef CONFIG_VSX
1183         case KVM_MMIO_REG_VSX:
1184                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1185                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);
1186
1187                 if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
1188                         kvmppc_set_vsr_dword(vcpu, gpr);
1189                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
1190                         kvmppc_set_vsr_word(vcpu, gpr);
1191                 else if (vcpu->arch.mmio_copy_type ==
1192                                 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1193                         kvmppc_set_vsr_dword_dump(vcpu, gpr);
1194                 else if (vcpu->arch.mmio_copy_type ==
1195                                 KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
1196                         kvmppc_set_vsr_word_dump(vcpu, gpr);
1197                 break;
1198 #endif
1199 #ifdef CONFIG_ALTIVEC
1200         case KVM_MMIO_REG_VMX:
1201                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1202                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);
1203
1204                 if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_DWORD)
1205                         kvmppc_set_vmx_dword(vcpu, gpr);
1206                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_WORD)
1207                         kvmppc_set_vmx_word(vcpu, gpr);
1208                 else if (vcpu->arch.mmio_copy_type ==
1209                                 KVMPPC_VMX_COPY_HWORD)
1210                         kvmppc_set_vmx_hword(vcpu, gpr);
1211                 else if (vcpu->arch.mmio_copy_type ==
1212                                 KVMPPC_VMX_COPY_BYTE)
1213                         kvmppc_set_vmx_byte(vcpu, gpr);
1214                 break;
1215 #endif
1216 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1217         case KVM_MMIO_REG_NESTED_GPR:
1218                 if (kvmppc_need_byteswap(vcpu))
1219                         gpr = swab64(gpr);
1220                 kvm_vcpu_write_guest(vcpu, vcpu->arch.nested_io_gpr, &gpr,
1221                                      sizeof(gpr));
1222                 break;
1223 #endif
1224         default:
1225                 BUG();
1226         }
1227 }
1228
1229 static int __kvmppc_handle_load(struct kvm_vcpu *vcpu,
1230                                 unsigned int rt, unsigned int bytes,
1231                                 int is_default_endian, int sign_extend)
1232 {
1233         struct kvm_run *run = vcpu->run;
1234         int idx, ret;
1235         bool host_swabbed;
1236
1237         /* Pity C doesn't have a logical XOR operator */
1238         if (kvmppc_need_byteswap(vcpu)) {
1239                 host_swabbed = is_default_endian;
1240         } else {
1241                 host_swabbed = !is_default_endian;
1242         }
1243
1244         if (bytes > sizeof(run->mmio.data)) {
1245                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1246                        run->mmio.len);
1247         }
1248
1249         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1250         run->mmio.len = bytes;
1251         run->mmio.is_write = 0;
1252
1253         vcpu->arch.io_gpr = rt;
1254         vcpu->arch.mmio_host_swabbed = host_swabbed;
1255         vcpu->mmio_needed = 1;
1256         vcpu->mmio_is_write = 0;
1257         vcpu->arch.mmio_sign_extend = sign_extend;
1258
1259         idx = srcu_read_lock(&vcpu->kvm->srcu);
1260
1261         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1262                               bytes, &run->mmio.data);
1263
1264         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1265
1266         if (!ret) {
1267                 kvmppc_complete_mmio_load(vcpu);
1268                 vcpu->mmio_needed = 0;
1269                 return EMULATE_DONE;
1270         }
1271
1272         return EMULATE_DO_MMIO;
1273 }
1274
1275 int kvmppc_handle_load(struct kvm_vcpu *vcpu,
1276                        unsigned int rt, unsigned int bytes,
1277                        int is_default_endian)
1278 {
1279         return __kvmppc_handle_load(vcpu, rt, bytes, is_default_endian, 0);
1280 }
1281 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1282
1283 /* Same as above, but sign extends */
1284 int kvmppc_handle_loads(struct kvm_vcpu *vcpu,
1285                         unsigned int rt, unsigned int bytes,
1286                         int is_default_endian)
1287 {
1288         return __kvmppc_handle_load(vcpu, rt, bytes, is_default_endian, 1);
1289 }
1290
1291 #ifdef CONFIG_VSX
1292 int kvmppc_handle_vsx_load(struct kvm_vcpu *vcpu,
1293                         unsigned int rt, unsigned int bytes,
1294                         int is_default_endian, int mmio_sign_extend)
1295 {
1296         enum emulation_result emulated = EMULATE_DONE;
1297
1298         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1299         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1300                 return EMULATE_FAIL;
1301
1302         while (vcpu->arch.mmio_vsx_copy_nums) {
1303                 emulated = __kvmppc_handle_load(vcpu, rt, bytes,
1304                         is_default_endian, mmio_sign_extend);
1305
1306                 if (emulated != EMULATE_DONE)
1307                         break;
1308
1309                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1310
1311                 vcpu->arch.mmio_vsx_copy_nums--;
1312                 vcpu->arch.mmio_vsx_offset++;
1313         }
1314         return emulated;
1315 }
1316 #endif /* CONFIG_VSX */
1317
1318 int kvmppc_handle_store(struct kvm_vcpu *vcpu,
1319                         u64 val, unsigned int bytes, int is_default_endian)
1320 {
1321         struct kvm_run *run = vcpu->run;
1322         void *data = run->mmio.data;
1323         int idx, ret;
1324         bool host_swabbed;
1325
1326         /* Pity C doesn't have a logical XOR operator */
1327         if (kvmppc_need_byteswap(vcpu)) {
1328                 host_swabbed = is_default_endian;
1329         } else {
1330                 host_swabbed = !is_default_endian;
1331         }
1332
1333         if (bytes > sizeof(run->mmio.data)) {
1334                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1335                        run->mmio.len);
1336         }
1337
1338         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1339         run->mmio.len = bytes;
1340         run->mmio.is_write = 1;
1341         vcpu->mmio_needed = 1;
1342         vcpu->mmio_is_write = 1;
1343
1344         if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1345                 val = dp_to_sp(val);
1346
1347         /* Store the value at the lowest bytes in 'data'. */
1348         if (!host_swabbed) {
1349                 switch (bytes) {
1350                 case 8: *(u64 *)data = val; break;
1351                 case 4: *(u32 *)data = val; break;
1352                 case 2: *(u16 *)data = val; break;
1353                 case 1: *(u8  *)data = val; break;
1354                 }
1355         } else {
1356                 switch (bytes) {
1357                 case 8: *(u64 *)data = swab64(val); break;
1358                 case 4: *(u32 *)data = swab32(val); break;
1359                 case 2: *(u16 *)data = swab16(val); break;
1360                 case 1: *(u8  *)data = val; break;
1361                 }
1362         }
1363
1364         idx = srcu_read_lock(&vcpu->kvm->srcu);
1365
1366         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1367                                bytes, &run->mmio.data);
1368
1369         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1370
1371         if (!ret) {
1372                 vcpu->mmio_needed = 0;
1373                 return EMULATE_DONE;
1374         }
1375
1376         return EMULATE_DO_MMIO;
1377 }
1378 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1379
1380 #ifdef CONFIG_VSX
1381 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1382 {
1383         u32 dword_offset, word_offset;
1384         union kvmppc_one_reg reg;
1385         int vsx_offset = 0;
1386         int copy_type = vcpu->arch.mmio_copy_type;
1387         int result = 0;
1388
1389         switch (copy_type) {
1390         case KVMPPC_VSX_COPY_DWORD:
1391                 vsx_offset =
1392                         kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1393
1394                 if (vsx_offset == -1) {
1395                         result = -1;
1396                         break;
1397                 }
1398
1399                 if (rs < 32) {
1400                         *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
1401                 } else {
1402                         reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1403                         *val = reg.vsxval[vsx_offset];
1404                 }
1405                 break;
1406
1407         case KVMPPC_VSX_COPY_WORD:
1408                 vsx_offset =
1409                         kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1410
1411                 if (vsx_offset == -1) {
1412                         result = -1;
1413                         break;
1414                 }
1415
1416                 if (rs < 32) {
1417                         dword_offset = vsx_offset / 2;
1418                         word_offset = vsx_offset % 2;
1419                         reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
1420                         *val = reg.vsx32val[word_offset];
1421                 } else {
1422                         reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1423                         *val = reg.vsx32val[vsx_offset];
1424                 }
1425                 break;
1426
1427         default:
1428                 result = -1;
1429                 break;
1430         }
1431
1432         return result;
1433 }
1434
1435 int kvmppc_handle_vsx_store(struct kvm_vcpu *vcpu,
1436                         int rs, unsigned int bytes, int is_default_endian)
1437 {
1438         u64 val;
1439         enum emulation_result emulated = EMULATE_DONE;
1440
1441         vcpu->arch.io_gpr = rs;
1442
1443         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1444         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1445                 return EMULATE_FAIL;
1446
1447         while (vcpu->arch.mmio_vsx_copy_nums) {
1448                 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1449                         return EMULATE_FAIL;
1450
1451                 emulated = kvmppc_handle_store(vcpu,
1452                          val, bytes, is_default_endian);
1453
1454                 if (emulated != EMULATE_DONE)
1455                         break;
1456
1457                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1458
1459                 vcpu->arch.mmio_vsx_copy_nums--;
1460                 vcpu->arch.mmio_vsx_offset++;
1461         }
1462
1463         return emulated;
1464 }
1465
1466 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu)
1467 {
1468         struct kvm_run *run = vcpu->run;
1469         enum emulation_result emulated = EMULATE_FAIL;
1470         int r;
1471
1472         vcpu->arch.paddr_accessed += run->mmio.len;
1473
1474         if (!vcpu->mmio_is_write) {
1475                 emulated = kvmppc_handle_vsx_load(vcpu, vcpu->arch.io_gpr,
1476                          run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1477         } else {
1478                 emulated = kvmppc_handle_vsx_store(vcpu,
1479                          vcpu->arch.io_gpr, run->mmio.len, 1);
1480         }
1481
1482         switch (emulated) {
1483         case EMULATE_DO_MMIO:
1484                 run->exit_reason = KVM_EXIT_MMIO;
1485                 r = RESUME_HOST;
1486                 break;
1487         case EMULATE_FAIL:
1488                 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1489                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1490                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1491                 r = RESUME_HOST;
1492                 break;
1493         default:
1494                 r = RESUME_GUEST;
1495                 break;
1496         }
1497         return r;
1498 }
1499 #endif /* CONFIG_VSX */
1500
1501 #ifdef CONFIG_ALTIVEC
1502 int kvmppc_handle_vmx_load(struct kvm_vcpu *vcpu,
1503                 unsigned int rt, unsigned int bytes, int is_default_endian)
1504 {
1505         enum emulation_result emulated = EMULATE_DONE;
1506
1507         if (vcpu->arch.mmio_vsx_copy_nums > 2)
1508                 return EMULATE_FAIL;
1509
1510         while (vcpu->arch.mmio_vmx_copy_nums) {
1511                 emulated = __kvmppc_handle_load(vcpu, rt, bytes,
1512                                 is_default_endian, 0);
1513
1514                 if (emulated != EMULATE_DONE)
1515                         break;
1516
1517                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1518                 vcpu->arch.mmio_vmx_copy_nums--;
1519                 vcpu->arch.mmio_vmx_offset++;
1520         }
1521
1522         return emulated;
1523 }
1524
1525 int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
1526 {
1527         union kvmppc_one_reg reg;
1528         int vmx_offset = 0;
1529         int result = 0;
1530
1531         vmx_offset =
1532                 kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1533
1534         if (vmx_offset == -1)
1535                 return -1;
1536
1537         reg.vval = VCPU_VSX_VR(vcpu, index);
1538         *val = reg.vsxval[vmx_offset];
1539
1540         return result;
1541 }
1542
1543 int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
1544 {
1545         union kvmppc_one_reg reg;
1546         int vmx_offset = 0;
1547         int result = 0;
1548
1549         vmx_offset =
1550                 kvmppc_get_vmx_word_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1551
1552         if (vmx_offset == -1)
1553                 return -1;
1554
1555         reg.vval = VCPU_VSX_VR(vcpu, index);
1556         *val = reg.vsx32val[vmx_offset];
1557
1558         return result;
1559 }
1560
1561 int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
1562 {
1563         union kvmppc_one_reg reg;
1564         int vmx_offset = 0;
1565         int result = 0;
1566
1567         vmx_offset =
1568                 kvmppc_get_vmx_hword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1569
1570         if (vmx_offset == -1)
1571                 return -1;
1572
1573         reg.vval = VCPU_VSX_VR(vcpu, index);
1574         *val = reg.vsx16val[vmx_offset];
1575
1576         return result;
1577 }
1578
1579 int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
1580 {
1581         union kvmppc_one_reg reg;
1582         int vmx_offset = 0;
1583         int result = 0;
1584
1585         vmx_offset =
1586                 kvmppc_get_vmx_byte_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1587
1588         if (vmx_offset == -1)
1589                 return -1;
1590
1591         reg.vval = VCPU_VSX_VR(vcpu, index);
1592         *val = reg.vsx8val[vmx_offset];
1593
1594         return result;
1595 }
1596
1597 int kvmppc_handle_vmx_store(struct kvm_vcpu *vcpu,
1598                 unsigned int rs, unsigned int bytes, int is_default_endian)
1599 {
1600         u64 val = 0;
1601         unsigned int index = rs & KVM_MMIO_REG_MASK;
1602         enum emulation_result emulated = EMULATE_DONE;
1603
1604         if (vcpu->arch.mmio_vsx_copy_nums > 2)
1605                 return EMULATE_FAIL;
1606
1607         vcpu->arch.io_gpr = rs;
1608
1609         while (vcpu->arch.mmio_vmx_copy_nums) {
1610                 switch (vcpu->arch.mmio_copy_type) {
1611                 case KVMPPC_VMX_COPY_DWORD:
1612                         if (kvmppc_get_vmx_dword(vcpu, index, &val) == -1)
1613                                 return EMULATE_FAIL;
1614
1615                         break;
1616                 case KVMPPC_VMX_COPY_WORD:
1617                         if (kvmppc_get_vmx_word(vcpu, index, &val) == -1)
1618                                 return EMULATE_FAIL;
1619                         break;
1620                 case KVMPPC_VMX_COPY_HWORD:
1621                         if (kvmppc_get_vmx_hword(vcpu, index, &val) == -1)
1622                                 return EMULATE_FAIL;
1623                         break;
1624                 case KVMPPC_VMX_COPY_BYTE:
1625                         if (kvmppc_get_vmx_byte(vcpu, index, &val) == -1)
1626                                 return EMULATE_FAIL;
1627                         break;
1628                 default:
1629                         return EMULATE_FAIL;
1630                 }
1631
1632                 emulated = kvmppc_handle_store(vcpu, val, bytes,
1633                                 is_default_endian);
1634                 if (emulated != EMULATE_DONE)
1635                         break;
1636
1637                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1638                 vcpu->arch.mmio_vmx_copy_nums--;
1639                 vcpu->arch.mmio_vmx_offset++;
1640         }
1641
1642         return emulated;
1643 }
1644
1645 static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu)
1646 {
1647         struct kvm_run *run = vcpu->run;
1648         enum emulation_result emulated = EMULATE_FAIL;
1649         int r;
1650
1651         vcpu->arch.paddr_accessed += run->mmio.len;
1652
1653         if (!vcpu->mmio_is_write) {
1654                 emulated = kvmppc_handle_vmx_load(vcpu,
1655                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1656         } else {
1657                 emulated = kvmppc_handle_vmx_store(vcpu,
1658                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1659         }
1660
1661         switch (emulated) {
1662         case EMULATE_DO_MMIO:
1663                 run->exit_reason = KVM_EXIT_MMIO;
1664                 r = RESUME_HOST;
1665                 break;
1666         case EMULATE_FAIL:
1667                 pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
1668                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1669                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1670                 r = RESUME_HOST;
1671                 break;
1672         default:
1673                 r = RESUME_GUEST;
1674                 break;
1675         }
1676         return r;
1677 }
1678 #endif /* CONFIG_ALTIVEC */
1679
1680 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1681 {
1682         int r = 0;
1683         union kvmppc_one_reg val;
1684         int size;
1685
1686         size = one_reg_size(reg->id);
1687         if (size > sizeof(val))
1688                 return -EINVAL;
1689
1690         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1691         if (r == -EINVAL) {
1692                 r = 0;
1693                 switch (reg->id) {
1694 #ifdef CONFIG_ALTIVEC
1695                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1696                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1697                                 r = -ENXIO;
1698                                 break;
1699                         }
1700                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1701                         break;
1702                 case KVM_REG_PPC_VSCR:
1703                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1704                                 r = -ENXIO;
1705                                 break;
1706                         }
1707                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1708                         break;
1709                 case KVM_REG_PPC_VRSAVE:
1710                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
1711                         break;
1712 #endif /* CONFIG_ALTIVEC */
1713                 default:
1714                         r = -EINVAL;
1715                         break;
1716                 }
1717         }
1718
1719         if (r)
1720                 return r;
1721
1722         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1723                 r = -EFAULT;
1724
1725         return r;
1726 }
1727
1728 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1729 {
1730         int r;
1731         union kvmppc_one_reg val;
1732         int size;
1733
1734         size = one_reg_size(reg->id);
1735         if (size > sizeof(val))
1736                 return -EINVAL;
1737
1738         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1739                 return -EFAULT;
1740
1741         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1742         if (r == -EINVAL) {
1743                 r = 0;
1744                 switch (reg->id) {
1745 #ifdef CONFIG_ALTIVEC
1746                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1747                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1748                                 r = -ENXIO;
1749                                 break;
1750                         }
1751                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1752                         break;
1753                 case KVM_REG_PPC_VSCR:
1754                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1755                                 r = -ENXIO;
1756                                 break;
1757                         }
1758                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1759                         break;
1760                 case KVM_REG_PPC_VRSAVE:
1761                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1762                                 r = -ENXIO;
1763                                 break;
1764                         }
1765                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
1766                         break;
1767 #endif /* CONFIG_ALTIVEC */
1768                 default:
1769                         r = -EINVAL;
1770                         break;
1771                 }
1772         }
1773
1774         return r;
1775 }
1776
1777 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
1778 {
1779         struct kvm_run *run = vcpu->run;
1780         int r;
1781
1782         vcpu_load(vcpu);
1783
1784         if (vcpu->mmio_needed) {
1785                 vcpu->mmio_needed = 0;
1786                 if (!vcpu->mmio_is_write)
1787                         kvmppc_complete_mmio_load(vcpu);
1788 #ifdef CONFIG_VSX
1789                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1790                         vcpu->arch.mmio_vsx_copy_nums--;
1791                         vcpu->arch.mmio_vsx_offset++;
1792                 }
1793
1794                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1795                         r = kvmppc_emulate_mmio_vsx_loadstore(vcpu);
1796                         if (r == RESUME_HOST) {
1797                                 vcpu->mmio_needed = 1;
1798                                 goto out;
1799                         }
1800                 }
1801 #endif
1802 #ifdef CONFIG_ALTIVEC
1803                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1804                         vcpu->arch.mmio_vmx_copy_nums--;
1805                         vcpu->arch.mmio_vmx_offset++;
1806                 }
1807
1808                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1809                         r = kvmppc_emulate_mmio_vmx_loadstore(vcpu);
1810                         if (r == RESUME_HOST) {
1811                                 vcpu->mmio_needed = 1;
1812                                 goto out;
1813                         }
1814                 }
1815 #endif
1816         } else if (vcpu->arch.osi_needed) {
1817                 u64 *gprs = run->osi.gprs;
1818                 int i;
1819
1820                 for (i = 0; i < 32; i++)
1821                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1822                 vcpu->arch.osi_needed = 0;
1823         } else if (vcpu->arch.hcall_needed) {
1824                 int i;
1825
1826                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1827                 for (i = 0; i < 9; ++i)
1828                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1829                 vcpu->arch.hcall_needed = 0;
1830 #ifdef CONFIG_BOOKE
1831         } else if (vcpu->arch.epr_needed) {
1832                 kvmppc_set_epr(vcpu, run->epr.epr);
1833                 vcpu->arch.epr_needed = 0;
1834 #endif
1835         }
1836
1837         kvm_sigset_activate(vcpu);
1838
1839         if (run->immediate_exit)
1840                 r = -EINTR;
1841         else
1842                 r = kvmppc_vcpu_run(vcpu);
1843
1844         kvm_sigset_deactivate(vcpu);
1845
1846 #ifdef CONFIG_ALTIVEC
1847 out:
1848 #endif
1849         vcpu_put(vcpu);
1850         return r;
1851 }
1852
1853 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1854 {
1855         if (irq->irq == KVM_INTERRUPT_UNSET) {
1856                 kvmppc_core_dequeue_external(vcpu);
1857                 return 0;
1858         }
1859
1860         kvmppc_core_queue_external(vcpu, irq);
1861
1862         kvm_vcpu_kick(vcpu);
1863
1864         return 0;
1865 }
1866
1867 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1868                                      struct kvm_enable_cap *cap)
1869 {
1870         int r;
1871
1872         if (cap->flags)
1873                 return -EINVAL;
1874
1875         switch (cap->cap) {
1876         case KVM_CAP_PPC_OSI:
1877                 r = 0;
1878                 vcpu->arch.osi_enabled = true;
1879                 break;
1880         case KVM_CAP_PPC_PAPR:
1881                 r = 0;
1882                 vcpu->arch.papr_enabled = true;
1883                 break;
1884         case KVM_CAP_PPC_EPR:
1885                 r = 0;
1886                 if (cap->args[0])
1887                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1888                 else
1889                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1890                 break;
1891 #ifdef CONFIG_BOOKE
1892         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1893                 r = 0;
1894                 vcpu->arch.watchdog_enabled = true;
1895                 break;
1896 #endif
1897 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1898         case KVM_CAP_SW_TLB: {
1899                 struct kvm_config_tlb cfg;
1900                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1901
1902                 r = -EFAULT;
1903                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1904                         break;
1905
1906                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1907                 break;
1908         }
1909 #endif
1910 #ifdef CONFIG_KVM_MPIC
1911         case KVM_CAP_IRQ_MPIC: {
1912                 struct fd f;
1913                 struct kvm_device *dev;
1914
1915                 r = -EBADF;
1916                 f = fdget(cap->args[0]);
1917                 if (!f.file)
1918                         break;
1919
1920                 r = -EPERM;
1921                 dev = kvm_device_from_filp(f.file);
1922                 if (dev)
1923                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1924
1925                 fdput(f);
1926                 break;
1927         }
1928 #endif
1929 #ifdef CONFIG_KVM_XICS
1930         case KVM_CAP_IRQ_XICS: {
1931                 struct fd f;
1932                 struct kvm_device *dev;
1933
1934                 r = -EBADF;
1935                 f = fdget(cap->args[0]);
1936                 if (!f.file)
1937                         break;
1938
1939                 r = -EPERM;
1940                 dev = kvm_device_from_filp(f.file);
1941                 if (dev) {
1942                         if (xics_on_xive())
1943                                 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1944                         else
1945                                 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1946                 }
1947
1948                 fdput(f);
1949                 break;
1950         }
1951 #endif /* CONFIG_KVM_XICS */
1952 #ifdef CONFIG_KVM_XIVE
1953         case KVM_CAP_PPC_IRQ_XIVE: {
1954                 struct fd f;
1955                 struct kvm_device *dev;
1956
1957                 r = -EBADF;
1958                 f = fdget(cap->args[0]);
1959                 if (!f.file)
1960                         break;
1961
1962                 r = -ENXIO;
1963                 if (!xive_enabled())
1964                         break;
1965
1966                 r = -EPERM;
1967                 dev = kvm_device_from_filp(f.file);
1968                 if (dev)
1969                         r = kvmppc_xive_native_connect_vcpu(dev, vcpu,
1970                                                             cap->args[1]);
1971
1972                 fdput(f);
1973                 break;
1974         }
1975 #endif /* CONFIG_KVM_XIVE */
1976 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1977         case KVM_CAP_PPC_FWNMI:
1978                 r = -EINVAL;
1979                 if (!is_kvmppc_hv_enabled(vcpu->kvm))
1980                         break;
1981                 r = 0;
1982                 vcpu->kvm->arch.fwnmi_enabled = true;
1983                 break;
1984 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
1985         default:
1986                 r = -EINVAL;
1987                 break;
1988         }
1989
1990         if (!r)
1991                 r = kvmppc_sanity_check(vcpu);
1992
1993         return r;
1994 }
1995
1996 bool kvm_arch_intc_initialized(struct kvm *kvm)
1997 {
1998 #ifdef CONFIG_KVM_MPIC
1999         if (kvm->arch.mpic)
2000                 return true;
2001 #endif
2002 #ifdef CONFIG_KVM_XICS
2003         if (kvm->arch.xics || kvm->arch.xive)
2004                 return true;
2005 #endif
2006         return false;
2007 }
2008
2009 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
2010                                     struct kvm_mp_state *mp_state)
2011 {
2012         return -EINVAL;
2013 }
2014
2015 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
2016                                     struct kvm_mp_state *mp_state)
2017 {
2018         return -EINVAL;
2019 }
2020
2021 long kvm_arch_vcpu_async_ioctl(struct file *filp,
2022                                unsigned int ioctl, unsigned long arg)
2023 {
2024         struct kvm_vcpu *vcpu = filp->private_data;
2025         void __user *argp = (void __user *)arg;
2026
2027         if (ioctl == KVM_INTERRUPT) {
2028                 struct kvm_interrupt irq;
2029                 if (copy_from_user(&irq, argp, sizeof(irq)))
2030                         return -EFAULT;
2031                 return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2032         }
2033         return -ENOIOCTLCMD;
2034 }
2035
2036 long kvm_arch_vcpu_ioctl(struct file *filp,
2037                          unsigned int ioctl, unsigned long arg)
2038 {
2039         struct kvm_vcpu *vcpu = filp->private_data;
2040         void __user *argp = (void __user *)arg;
2041         long r;
2042
2043         switch (ioctl) {
2044         case KVM_ENABLE_CAP:
2045         {
2046                 struct kvm_enable_cap cap;
2047                 r = -EFAULT;
2048                 vcpu_load(vcpu);
2049                 if (copy_from_user(&cap, argp, sizeof(cap)))
2050                         goto out;
2051                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
2052                 vcpu_put(vcpu);
2053                 break;
2054         }
2055
2056         case KVM_SET_ONE_REG:
2057         case KVM_GET_ONE_REG:
2058         {
2059                 struct kvm_one_reg reg;
2060                 r = -EFAULT;
2061                 if (copy_from_user(&reg, argp, sizeof(reg)))
2062                         goto out;
2063                 if (ioctl == KVM_SET_ONE_REG)
2064                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
2065                 else
2066                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
2067                 break;
2068         }
2069
2070 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
2071         case KVM_DIRTY_TLB: {
2072                 struct kvm_dirty_tlb dirty;
2073                 r = -EFAULT;
2074                 vcpu_load(vcpu);
2075                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
2076                         goto out;
2077                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
2078                 vcpu_put(vcpu);
2079                 break;
2080         }
2081 #endif
2082         default:
2083                 r = -EINVAL;
2084         }
2085
2086 out:
2087         return r;
2088 }
2089
2090 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2091 {
2092         return VM_FAULT_SIGBUS;
2093 }
2094
2095 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
2096 {
2097         u32 inst_nop = 0x60000000;
2098 #ifdef CONFIG_KVM_BOOKE_HV
2099         u32 inst_sc1 = 0x44000022;
2100         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
2101         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
2102         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
2103         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2104 #else
2105         u32 inst_lis = 0x3c000000;
2106         u32 inst_ori = 0x60000000;
2107         u32 inst_sc = 0x44000002;
2108         u32 inst_imm_mask = 0xffff;
2109
2110         /*
2111          * The hypercall to get into KVM from within guest context is as
2112          * follows:
2113          *
2114          *    lis r0, r0, KVM_SC_MAGIC_R0@h
2115          *    ori r0, KVM_SC_MAGIC_R0@l
2116          *    sc
2117          *    nop
2118          */
2119         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
2120         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
2121         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
2122         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2123 #endif
2124
2125         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
2126
2127         return 0;
2128 }
2129
2130 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
2131                           bool line_status)
2132 {
2133         if (!irqchip_in_kernel(kvm))
2134                 return -ENXIO;
2135
2136         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
2137                                         irq_event->irq, irq_event->level,
2138                                         line_status);
2139         return 0;
2140 }
2141
2142
2143 int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
2144                             struct kvm_enable_cap *cap)
2145 {
2146         int r;
2147
2148         if (cap->flags)
2149                 return -EINVAL;
2150
2151         switch (cap->cap) {
2152 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
2153         case KVM_CAP_PPC_ENABLE_HCALL: {
2154                 unsigned long hcall = cap->args[0];
2155
2156                 r = -EINVAL;
2157                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
2158                     cap->args[1] > 1)
2159                         break;
2160                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
2161                         break;
2162                 if (cap->args[1])
2163                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
2164                 else
2165                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
2166                 r = 0;
2167                 break;
2168         }
2169         case KVM_CAP_PPC_SMT: {
2170                 unsigned long mode = cap->args[0];
2171                 unsigned long flags = cap->args[1];
2172
2173                 r = -EINVAL;
2174                 if (kvm->arch.kvm_ops->set_smt_mode)
2175                         r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
2176                 break;
2177         }
2178
2179         case KVM_CAP_PPC_NESTED_HV:
2180                 r = -EINVAL;
2181                 if (!is_kvmppc_hv_enabled(kvm) ||
2182                     !kvm->arch.kvm_ops->enable_nested)
2183                         break;
2184                 r = kvm->arch.kvm_ops->enable_nested(kvm);
2185                 break;
2186 #endif
2187 #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
2188         case KVM_CAP_PPC_SECURE_GUEST:
2189                 r = -EINVAL;
2190                 if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_svm)
2191                         break;
2192                 r = kvm->arch.kvm_ops->enable_svm(kvm);
2193                 break;
2194         case KVM_CAP_PPC_DAWR1:
2195                 r = -EINVAL;
2196                 if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_dawr1)
2197                         break;
2198                 r = kvm->arch.kvm_ops->enable_dawr1(kvm);
2199                 break;
2200 #endif
2201         default:
2202                 r = -EINVAL;
2203                 break;
2204         }
2205
2206         return r;
2207 }
2208
2209 #ifdef CONFIG_PPC_BOOK3S_64
2210 /*
2211  * These functions check whether the underlying hardware is safe
2212  * against attacks based on observing the effects of speculatively
2213  * executed instructions, and whether it supplies instructions for
2214  * use in workarounds.  The information comes from firmware, either
2215  * via the device tree on powernv platforms or from an hcall on
2216  * pseries platforms.
2217  */
2218 #ifdef CONFIG_PPC_PSERIES
2219 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2220 {
2221         struct h_cpu_char_result c;
2222         unsigned long rc;
2223
2224         if (!machine_is(pseries))
2225                 return -ENOTTY;
2226
2227         rc = plpar_get_cpu_characteristics(&c);
2228         if (rc == H_SUCCESS) {
2229                 cp->character = c.character;
2230                 cp->behaviour = c.behaviour;
2231                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2232                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2233                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2234                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2235                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2236                         KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
2237                         KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
2238                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2239                         KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2240                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2241                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2242                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2243                         KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2244         }
2245         return 0;
2246 }
2247 #else
2248 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2249 {
2250         return -ENOTTY;
2251 }
2252 #endif
2253
2254 static inline bool have_fw_feat(struct device_node *fw_features,
2255                                 const char *state, const char *name)
2256 {
2257         struct device_node *np;
2258         bool r = false;
2259
2260         np = of_get_child_by_name(fw_features, name);
2261         if (np) {
2262                 r = of_property_read_bool(np, state);
2263                 of_node_put(np);
2264         }
2265         return r;
2266 }
2267
2268 static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2269 {
2270         struct device_node *np, *fw_features;
2271         int r;
2272
2273         memset(cp, 0, sizeof(*cp));
2274         r = pseries_get_cpu_char(cp);
2275         if (r != -ENOTTY)
2276                 return r;
2277
2278         np = of_find_node_by_name(NULL, "ibm,opal");
2279         if (np) {
2280                 fw_features = of_get_child_by_name(np, "fw-features");
2281                 of_node_put(np);
2282                 if (!fw_features)
2283                         return 0;
2284                 if (have_fw_feat(fw_features, "enabled",
2285                                  "inst-spec-barrier-ori31,31,0"))
2286                         cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31;
2287                 if (have_fw_feat(fw_features, "enabled",
2288                                  "fw-bcctrl-serialized"))
2289                         cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED;
2290                 if (have_fw_feat(fw_features, "enabled",
2291                                  "inst-l1d-flush-ori30,30,0"))
2292                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30;
2293                 if (have_fw_feat(fw_features, "enabled",
2294                                  "inst-l1d-flush-trig2"))
2295                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2;
2296                 if (have_fw_feat(fw_features, "enabled",
2297                                  "fw-l1d-thread-split"))
2298                         cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV;
2299                 if (have_fw_feat(fw_features, "enabled",
2300                                  "fw-count-cache-disabled"))
2301                         cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2302                 if (have_fw_feat(fw_features, "enabled",
2303                                  "fw-count-cache-flush-bcctr2,0,0"))
2304                         cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2305                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2306                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2307                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2308                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2309                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2310                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2311                         KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2312
2313                 if (have_fw_feat(fw_features, "enabled",
2314                                  "speculation-policy-favor-security"))
2315                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY;
2316                 if (!have_fw_feat(fw_features, "disabled",
2317                                   "needs-l1d-flush-msr-pr-0-to-1"))
2318                         cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR;
2319                 if (!have_fw_feat(fw_features, "disabled",
2320                                   "needs-spec-barrier-for-bound-checks"))
2321                         cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2322                 if (have_fw_feat(fw_features, "enabled",
2323                                  "needs-count-cache-flush-on-context-switch"))
2324                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2325                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2326                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2327                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2328                         KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2329
2330                 of_node_put(fw_features);
2331         }
2332
2333         return 0;
2334 }
2335 #endif
2336
2337 long kvm_arch_vm_ioctl(struct file *filp,
2338                        unsigned int ioctl, unsigned long arg)
2339 {
2340         struct kvm *kvm __maybe_unused = filp->private_data;
2341         void __user *argp = (void __user *)arg;
2342         long r;
2343
2344         switch (ioctl) {
2345         case KVM_PPC_GET_PVINFO: {
2346                 struct kvm_ppc_pvinfo pvinfo;
2347                 memset(&pvinfo, 0, sizeof(pvinfo));
2348                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
2349                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
2350                         r = -EFAULT;
2351                         goto out;
2352                 }
2353
2354                 break;
2355         }
2356 #ifdef CONFIG_SPAPR_TCE_IOMMU
2357         case KVM_CREATE_SPAPR_TCE_64: {
2358                 struct kvm_create_spapr_tce_64 create_tce_64;
2359
2360                 r = -EFAULT;
2361                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
2362                         goto out;
2363                 if (create_tce_64.flags) {
2364                         r = -EINVAL;
2365                         goto out;
2366                 }
2367                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2368                 goto out;
2369         }
2370         case KVM_CREATE_SPAPR_TCE: {
2371                 struct kvm_create_spapr_tce create_tce;
2372                 struct kvm_create_spapr_tce_64 create_tce_64;
2373
2374                 r = -EFAULT;
2375                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
2376                         goto out;
2377
2378                 create_tce_64.liobn = create_tce.liobn;
2379                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
2380                 create_tce_64.offset = 0;
2381                 create_tce_64.size = create_tce.window_size >>
2382                                 IOMMU_PAGE_SHIFT_4K;
2383                 create_tce_64.flags = 0;
2384                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2385                 goto out;
2386         }
2387 #endif
2388 #ifdef CONFIG_PPC_BOOK3S_64
2389         case KVM_PPC_GET_SMMU_INFO: {
2390                 struct kvm_ppc_smmu_info info;
2391                 struct kvm *kvm = filp->private_data;
2392
2393                 memset(&info, 0, sizeof(info));
2394                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2395                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2396                         r = -EFAULT;
2397                 break;
2398         }
2399         case KVM_PPC_RTAS_DEFINE_TOKEN: {
2400                 struct kvm *kvm = filp->private_data;
2401
2402                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
2403                 break;
2404         }
2405         case KVM_PPC_CONFIGURE_V3_MMU: {
2406                 struct kvm *kvm = filp->private_data;
2407                 struct kvm_ppc_mmuv3_cfg cfg;
2408
2409                 r = -EINVAL;
2410                 if (!kvm->arch.kvm_ops->configure_mmu)
2411                         goto out;
2412                 r = -EFAULT;
2413                 if (copy_from_user(&cfg, argp, sizeof(cfg)))
2414                         goto out;
2415                 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
2416                 break;
2417         }
2418         case KVM_PPC_GET_RMMU_INFO: {
2419                 struct kvm *kvm = filp->private_data;
2420                 struct kvm_ppc_rmmu_info info;
2421
2422                 r = -EINVAL;
2423                 if (!kvm->arch.kvm_ops->get_rmmu_info)
2424                         goto out;
2425                 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
2426                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2427                         r = -EFAULT;
2428                 break;
2429         }
2430         case KVM_PPC_GET_CPU_CHAR: {
2431                 struct kvm_ppc_cpu_char cpuchar;
2432
2433                 r = kvmppc_get_cpu_char(&cpuchar);
2434                 if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar)))
2435                         r = -EFAULT;
2436                 break;
2437         }
2438         case KVM_PPC_SVM_OFF: {
2439                 struct kvm *kvm = filp->private_data;
2440
2441                 r = 0;
2442                 if (!kvm->arch.kvm_ops->svm_off)
2443                         goto out;
2444
2445                 r = kvm->arch.kvm_ops->svm_off(kvm);
2446                 break;
2447         }
2448         default: {
2449                 struct kvm *kvm = filp->private_data;
2450                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
2451         }
2452 #else /* CONFIG_PPC_BOOK3S_64 */
2453         default:
2454                 r = -ENOTTY;
2455 #endif
2456         }
2457 out:
2458         return r;
2459 }
2460
2461 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
2462 static unsigned long nr_lpids;
2463
2464 long kvmppc_alloc_lpid(void)
2465 {
2466         long lpid;
2467
2468         do {
2469                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
2470                 if (lpid >= nr_lpids) {
2471                         pr_err("%s: No LPIDs free\n", __func__);
2472                         return -ENOMEM;
2473                 }
2474         } while (test_and_set_bit(lpid, lpid_inuse));
2475
2476         return lpid;
2477 }
2478 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2479
2480 void kvmppc_claim_lpid(long lpid)
2481 {
2482         set_bit(lpid, lpid_inuse);
2483 }
2484 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
2485
2486 void kvmppc_free_lpid(long lpid)
2487 {
2488         clear_bit(lpid, lpid_inuse);
2489 }
2490 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2491
2492 void kvmppc_init_lpid(unsigned long nr_lpids_param)
2493 {
2494         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
2495         memset(lpid_inuse, 0, sizeof(lpid_inuse));
2496 }
2497 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2498
2499 int kvm_arch_init(void *opaque)
2500 {
2501         return 0;
2502 }
2503
2504 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);