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 && kvmppc_hv_ops->hash_v3_possible &&
 615                        kvmppc_hv_ops->hash_v3_possible());
 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         case KVM_CAP_PPC_RPT_INVALIDATE:
 686                 r = 1;
 687                 break;
 688 #endif
 689         default:
 690                 r = 0;
 691                 break;
 692         }
 693         return r;
 694
 695 }
 696
 697 long kvm_arch_dev_ioctl(struct file *filp,
 698                         unsigned int ioctl, unsigned long arg)
 699 {
 700         return -EINVAL;
 701 }
 702
 703 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
 704 {
 705         kvmppc_core_free_memslot(kvm, slot);
 706 }
 707
 708 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 709                                    struct kvm_memory_slot *memslot,
 710                                    const struct kvm_userspace_memory_region *mem,
 711                                    enum kvm_mr_change change)
 712 {
 713         return kvmppc_core_prepare_memory_region(kvm, memslot, mem, change);
 714 }
 715
 716 void kvm_arch_commit_memory_region(struct kvm *kvm,
 717                                    const struct kvm_userspace_memory_region *mem,
 718                                    struct kvm_memory_slot *old,
 719                                    const struct kvm_memory_slot *new,
 720                                    enum kvm_mr_change change)
 721 {
 722         kvmppc_core_commit_memory_region(kvm, mem, old, new, change);
 723 }
 724
 725 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 726                                    struct kvm_memory_slot *slot)
 727 {
 728         kvmppc_core_flush_memslot(kvm, slot);
 729 }
 730
 731 int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
 732 {
 733         return 0;
 734 }
 735
 736 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 737 {
 738         struct kvm_vcpu *vcpu;
 739
 740         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 741         kvmppc_decrementer_func(vcpu);
 742
 743         return HRTIMER_NORESTART;
 744 }
 745
 746 int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 747 {
 748         int err;
 749
 750         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 751         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 752         vcpu->arch.dec_expires = get_tb();
 753
 754 #ifdef CONFIG_KVM_EXIT_TIMING
 755         mutex_init(&vcpu->arch.exit_timing_lock);
 756 #endif
 757         err = kvmppc_subarch_vcpu_init(vcpu);
 758         if (err)
 759                 return err;
 760
 761         err = kvmppc_core_vcpu_create(vcpu);
 762         if (err)
 763                 goto out_vcpu_uninit;
 764
 765         vcpu->arch.waitp = &vcpu->wait;
 766         kvmppc_create_vcpu_debugfs(vcpu, vcpu->vcpu_id);
 767         return 0;
 768
 769 out_vcpu_uninit:
 770         kvmppc_subarch_vcpu_uninit(vcpu);
 771         return err;
 772 }
 773
 774 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 775 {
 776 }
 777
 778 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 779 {
 780         /* Make sure we're not using the vcpu anymore */
 781         hrtimer_cancel(&vcpu->arch.dec_timer);
 782
 783         kvmppc_remove_vcpu_debugfs(vcpu);
 784
 785         switch (vcpu->arch.irq_type) {
 786         case KVMPPC_IRQ_MPIC:
 787                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 788                 break;
 789         case KVMPPC_IRQ_XICS:
 790                 if (xics_on_xive())
 791                         kvmppc_xive_cleanup_vcpu(vcpu);
 792                 else
 793                         kvmppc_xics_free_icp(vcpu);
 794                 break;
 795         case KVMPPC_IRQ_XIVE:
 796                 kvmppc_xive_native_cleanup_vcpu(vcpu);
 797                 break;
 798         }
 799
 800         kvmppc_core_vcpu_free(vcpu);
 801
 802         kvmppc_subarch_vcpu_uninit(vcpu);
 803 }
 804
 805 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 806 {
 807         return kvmppc_core_pending_dec(vcpu);
 808 }
 809
 810 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 811 {
 812 #ifdef CONFIG_BOOKE
 813         /*
 814          * vrsave (formerly usprg0) isn't used by Linux, but may
 815          * be used by the guest.
 816          *
 817          * On non-booke this is associated with Altivec and
 818          * is handled by code in book3s.c.
 819          */
 820         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 821 #endif
 822         kvmppc_core_vcpu_load(vcpu, cpu);
 823 }
 824
 825 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 826 {
 827         kvmppc_core_vcpu_put(vcpu);
 828 #ifdef CONFIG_BOOKE
 829         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 830 #endif
 831 }
 832
 833 /*
 834  * irq_bypass_add_producer and irq_bypass_del_producer are only
 835  * useful if the architecture supports PCI passthrough.
 836  * irq_bypass_stop and irq_bypass_start are not needed and so
 837  * kvm_ops are not defined for them.
 838  */
 839 bool kvm_arch_has_irq_bypass(void)
 840 {
 841         return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
 842                 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
 843 }
 844
 845 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
 846                                      struct irq_bypass_producer *prod)
 847 {
 848         struct kvm_kernel_irqfd *irqfd =
 849                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 850         struct kvm *kvm = irqfd->kvm;
 851
 852         if (kvm->arch.kvm_ops->irq_bypass_add_producer)
 853                 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
 854
 855         return 0;
 856 }
 857
 858 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
 859                                       struct irq_bypass_producer *prod)
 860 {
 861         struct kvm_kernel_irqfd *irqfd =
 862                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 863         struct kvm *kvm = irqfd->kvm;
 864
 865         if (kvm->arch.kvm_ops->irq_bypass_del_producer)
 866                 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
 867 }
 868
 869 #ifdef CONFIG_VSX
 870 static inline int kvmppc_get_vsr_dword_offset(int index)
 871 {
 872         int offset;
 873
 874         if ((index != 0) && (index != 1))
 875                 return -1;
 876
 877 #ifdef __BIG_ENDIAN
 878         offset =  index;
 879 #else
 880         offset = 1 - index;
 881 #endif
 882
 883         return offset;
 884 }
 885
 886 static inline int kvmppc_get_vsr_word_offset(int index)
 887 {
 888         int offset;
 889
 890         if ((index > 3) || (index < 0))
 891                 return -1;
 892
 893 #ifdef __BIG_ENDIAN
 894         offset = index;
 895 #else
 896         offset = 3 - index;
 897 #endif
 898         return offset;
 899 }
 900
 901 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
 902         u64 gpr)
 903 {
 904         union kvmppc_one_reg val;
 905         int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
 906         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 907
 908         if (offset == -1)
 909                 return;
 910
 911         if (index >= 32) {
 912                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 913                 val.vsxval[offset] = gpr;
 914                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 915         } else {
 916                 VCPU_VSX_FPR(vcpu, index, offset) = gpr;
 917         }
 918 }
 919
 920 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
 921         u64 gpr)
 922 {
 923         union kvmppc_one_reg val;
 924         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 925
 926         if (index >= 32) {
 927                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 928                 val.vsxval[0] = gpr;
 929                 val.vsxval[1] = gpr;
 930                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 931         } else {
 932                 VCPU_VSX_FPR(vcpu, index, 0) = gpr;
 933                 VCPU_VSX_FPR(vcpu, index, 1) = gpr;
 934         }
 935 }
 936
 937 static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
 938         u32 gpr)
 939 {
 940         union kvmppc_one_reg val;
 941         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 942
 943         if (index >= 32) {
 944                 val.vsx32val[0] = gpr;
 945                 val.vsx32val[1] = gpr;
 946                 val.vsx32val[2] = gpr;
 947                 val.vsx32val[3] = gpr;
 948                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 949         } else {
 950                 val.vsx32val[0] = gpr;
 951                 val.vsx32val[1] = gpr;
 952                 VCPU_VSX_FPR(vcpu, index, 0) = val.vsxval[0];
 953                 VCPU_VSX_FPR(vcpu, index, 1) = val.vsxval[0];
 954         }
 955 }
 956
 957 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
 958         u32 gpr32)
 959 {
 960         union kvmppc_one_reg val;
 961         int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
 962         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 963         int dword_offset, word_offset;
 964
 965         if (offset == -1)
 966                 return;
 967
 968         if (index >= 32) {
 969                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 970                 val.vsx32val[offset] = gpr32;
 971                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 972         } else {
 973                 dword_offset = offset / 2;
 974                 word_offset = offset % 2;
 975                 val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
 976                 val.vsx32val[word_offset] = gpr32;
 977                 VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
 978         }
 979 }
 980 #endif /* CONFIG_VSX */
 981
 982 #ifdef CONFIG_ALTIVEC
 983 static inline int kvmppc_get_vmx_offset_generic(struct kvm_vcpu *vcpu,
 984                 int index, int element_size)
 985 {
 986         int offset;
 987         int elts = sizeof(vector128)/element_size;
 988
 989         if ((index < 0) || (index >= elts))
 990                 return -1;
 991
 992         if (kvmppc_need_byteswap(vcpu))
 993                 offset = elts - index - 1;
 994         else
 995                 offset = index;
 996
 997         return offset;
 998 }
 999
1000 static inline int kvmppc_get_vmx_dword_offset(struct kvm_vcpu *vcpu,
1001                 int index)
1002 {
1003         return kvmppc_get_vmx_offset_generic(vcpu, index, 8);
1004 }
1005
1006 static inline int kvmppc_get_vmx_word_offset(struct kvm_vcpu *vcpu,
1007                 int index)
1008 {
1009         return kvmppc_get_vmx_offset_generic(vcpu, index, 4);
1010 }
1011
1012 static inline int kvmppc_get_vmx_hword_offset(struct kvm_vcpu *vcpu,
1013                 int index)
1014 {
1015         return kvmppc_get_vmx_offset_generic(vcpu, index, 2);
1016 }
1017
1018 static inline int kvmppc_get_vmx_byte_offset(struct kvm_vcpu *vcpu,
1019                 int index)
1020 {
1021         return kvmppc_get_vmx_offset_generic(vcpu, index, 1);
1022 }
1023
1024
1025 static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
1026         u64 gpr)
1027 {
1028         union kvmppc_one_reg val;
1029         int offset = kvmppc_get_vmx_dword_offset(vcpu,
1030                         vcpu->arch.mmio_vmx_offset);
1031         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1032
1033         if (offset == -1)
1034                 return;
1035
1036         val.vval = VCPU_VSX_VR(vcpu, index);
1037         val.vsxval[offset] = gpr;
1038         VCPU_VSX_VR(vcpu, index) = val.vval;
1039 }
1040
1041 static inline void kvmppc_set_vmx_word(struct kvm_vcpu *vcpu,
1042         u32 gpr32)
1043 {
1044         union kvmppc_one_reg val;
1045         int offset = kvmppc_get_vmx_word_offset(vcpu,
1046                         vcpu->arch.mmio_vmx_offset);
1047         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1048
1049         if (offset == -1)
1050                 return;
1051
1052         val.vval = VCPU_VSX_VR(vcpu, index);
1053         val.vsx32val[offset] = gpr32;
1054         VCPU_VSX_VR(vcpu, index) = val.vval;
1055 }
1056
1057 static inline void kvmppc_set_vmx_hword(struct kvm_vcpu *vcpu,
1058         u16 gpr16)
1059 {
1060         union kvmppc_one_reg val;
1061         int offset = kvmppc_get_vmx_hword_offset(vcpu,
1062                         vcpu->arch.mmio_vmx_offset);
1063         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1064
1065         if (offset == -1)
1066                 return;
1067
1068         val.vval = VCPU_VSX_VR(vcpu, index);
1069         val.vsx16val[offset] = gpr16;
1070         VCPU_VSX_VR(vcpu, index) = val.vval;
1071 }
1072
1073 static inline void kvmppc_set_vmx_byte(struct kvm_vcpu *vcpu,
1074         u8 gpr8)
1075 {
1076         union kvmppc_one_reg val;
1077         int offset = kvmppc_get_vmx_byte_offset(vcpu,
1078                         vcpu->arch.mmio_vmx_offset);
1079         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1080
1081         if (offset == -1)
1082                 return;
1083
1084         val.vval = VCPU_VSX_VR(vcpu, index);
1085         val.vsx8val[offset] = gpr8;
1086         VCPU_VSX_VR(vcpu, index) = val.vval;
1087 }
1088 #endif /* CONFIG_ALTIVEC */
1089
1090 #ifdef CONFIG_PPC_FPU
1091 static inline u64 sp_to_dp(u32 fprs)
1092 {
1093         u64 fprd;
1094
1095         preempt_disable();
1096         enable_kernel_fp();
1097         asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m"UPD_CONSTR (fprd) : "m"UPD_CONSTR (fprs)
1098              : "fr0");
1099         preempt_enable();
1100         return fprd;
1101 }
1102
1103 static inline u32 dp_to_sp(u64 fprd)
1104 {
1105         u32 fprs;
1106
1107         preempt_disable();
1108         enable_kernel_fp();
1109         asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m"UPD_CONSTR (fprs) : "m"UPD_CONSTR (fprd)
1110              : "fr0");
1111         preempt_enable();
1112         return fprs;
1113 }
1114
1115 #else
1116 #define sp_to_dp(x)     (x)
1117 #define dp_to_sp(x)     (x)
1118 #endif /* CONFIG_PPC_FPU */
1119
1120 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu)
1121 {
1122         struct kvm_run *run = vcpu->run;
1123         u64 gpr;
1124
1125         if (run->mmio.len > sizeof(gpr)) {
1126                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
1127                 return;
1128         }
1129
1130         if (!vcpu->arch.mmio_host_swabbed) {
1131                 switch (run->mmio.len) {
1132                 case 8: gpr = *(u64 *)run->mmio.data; break;
1133                 case 4: gpr = *(u32 *)run->mmio.data; break;
1134                 case 2: gpr = *(u16 *)run->mmio.data; break;
1135                 case 1: gpr = *(u8 *)run->mmio.data; break;
1136                 }
1137         } else {
1138                 switch (run->mmio.len) {
1139                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
1140                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
1141                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
1142                 case 1: gpr = *(u8 *)run->mmio.data; break;
1143                 }
1144         }
1145
1146         /* conversion between single and double precision */
1147         if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
1148                 gpr = sp_to_dp(gpr);
1149
1150         if (vcpu->arch.mmio_sign_extend) {
1151                 switch (run->mmio.len) {
1152 #ifdef CONFIG_PPC64
1153                 case 4:
1154                         gpr = (s64)(s32)gpr;
1155                         break;
1156 #endif
1157                 case 2:
1158                         gpr = (s64)(s16)gpr;
1159                         break;
1160                 case 1:
1161                         gpr = (s64)(s8)gpr;
1162                         break;
1163                 }
1164         }
1165
1166         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1167         case KVM_MMIO_REG_GPR:
1168                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1169                 break;
1170         case KVM_MMIO_REG_FPR:
1171                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1172                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);
1173
1174                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1175                 break;
1176 #ifdef CONFIG_PPC_BOOK3S
1177         case KVM_MMIO_REG_QPR:
1178                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1179                 break;
1180         case KVM_MMIO_REG_FQPR:
1181                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1182                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1183                 break;
1184 #endif
1185 #ifdef CONFIG_VSX
1186         case KVM_MMIO_REG_VSX:
1187                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1188                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);
1189
1190                 if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
1191                         kvmppc_set_vsr_dword(vcpu, gpr);
1192                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
1193                         kvmppc_set_vsr_word(vcpu, gpr);
1194                 else if (vcpu->arch.mmio_copy_type ==
1195                                 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1196                         kvmppc_set_vsr_dword_dump(vcpu, gpr);
1197                 else if (vcpu->arch.mmio_copy_type ==
1198                                 KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
1199                         kvmppc_set_vsr_word_dump(vcpu, gpr);
1200                 break;
1201 #endif
1202 #ifdef CONFIG_ALTIVEC
1203         case KVM_MMIO_REG_VMX:
1204                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1205                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);
1206
1207                 if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_DWORD)
1208                         kvmppc_set_vmx_dword(vcpu, gpr);
1209                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_WORD)
1210                         kvmppc_set_vmx_word(vcpu, gpr);
1211                 else if (vcpu->arch.mmio_copy_type ==
1212                                 KVMPPC_VMX_COPY_HWORD)
1213                         kvmppc_set_vmx_hword(vcpu, gpr);
1214                 else if (vcpu->arch.mmio_copy_type ==
1215                                 KVMPPC_VMX_COPY_BYTE)
1216                         kvmppc_set_vmx_byte(vcpu, gpr);
1217                 break;
1218 #endif
1219 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1220         case KVM_MMIO_REG_NESTED_GPR:
1221                 if (kvmppc_need_byteswap(vcpu))
1222                         gpr = swab64(gpr);
1223                 kvm_vcpu_write_guest(vcpu, vcpu->arch.nested_io_gpr, &gpr,
1224                                      sizeof(gpr));
1225                 break;
1226 #endif
1227         default:
1228                 BUG();
1229         }
1230 }
1231
1232 static int __kvmppc_handle_load(struct kvm_vcpu *vcpu,
1233                                 unsigned int rt, unsigned int bytes,
1234                                 int is_default_endian, int sign_extend)
1235 {
1236         struct kvm_run *run = vcpu->run;
1237         int idx, ret;
1238         bool host_swabbed;
1239
1240         /* Pity C doesn't have a logical XOR operator */
1241         if (kvmppc_need_byteswap(vcpu)) {
1242                 host_swabbed = is_default_endian;
1243         } else {
1244                 host_swabbed = !is_default_endian;
1245         }
1246
1247         if (bytes > sizeof(run->mmio.data)) {
1248                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1249                        run->mmio.len);
1250         }
1251
1252         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1253         run->mmio.len = bytes;
1254         run->mmio.is_write = 0;
1255
1256         vcpu->arch.io_gpr = rt;
1257         vcpu->arch.mmio_host_swabbed = host_swabbed;
1258         vcpu->mmio_needed = 1;
1259         vcpu->mmio_is_write = 0;
1260         vcpu->arch.mmio_sign_extend = sign_extend;
1261
1262         idx = srcu_read_lock(&vcpu->kvm->srcu);
1263
1264         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1265                               bytes, &run->mmio.data);
1266
1267         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1268
1269         if (!ret) {
1270                 kvmppc_complete_mmio_load(vcpu);
1271                 vcpu->mmio_needed = 0;
1272                 return EMULATE_DONE;
1273         }
1274
1275         return EMULATE_DO_MMIO;
1276 }
1277
1278 int kvmppc_handle_load(struct kvm_vcpu *vcpu,
1279                        unsigned int rt, unsigned int bytes,
1280                        int is_default_endian)
1281 {
1282         return __kvmppc_handle_load(vcpu, rt, bytes, is_default_endian, 0);
1283 }
1284 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1285
1286 /* Same as above, but sign extends */
1287 int kvmppc_handle_loads(struct kvm_vcpu *vcpu,
1288                         unsigned int rt, unsigned int bytes,
1289                         int is_default_endian)
1290 {
1291         return __kvmppc_handle_load(vcpu, rt, bytes, is_default_endian, 1);
1292 }
1293
1294 #ifdef CONFIG_VSX
1295 int kvmppc_handle_vsx_load(struct kvm_vcpu *vcpu,
1296                         unsigned int rt, unsigned int bytes,
1297                         int is_default_endian, int mmio_sign_extend)
1298 {
1299         enum emulation_result emulated = EMULATE_DONE;
1300
1301         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1302         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1303                 return EMULATE_FAIL;
1304
1305         while (vcpu->arch.mmio_vsx_copy_nums) {
1306                 emulated = __kvmppc_handle_load(vcpu, rt, bytes,
1307                         is_default_endian, mmio_sign_extend);
1308
1309                 if (emulated != EMULATE_DONE)
1310                         break;
1311
1312                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1313
1314                 vcpu->arch.mmio_vsx_copy_nums--;
1315                 vcpu->arch.mmio_vsx_offset++;
1316         }
1317         return emulated;
1318 }
1319 #endif /* CONFIG_VSX */
1320
1321 int kvmppc_handle_store(struct kvm_vcpu *vcpu,
1322                         u64 val, unsigned int bytes, int is_default_endian)
1323 {
1324         struct kvm_run *run = vcpu->run;
1325         void *data = run->mmio.data;
1326         int idx, ret;
1327         bool host_swabbed;
1328
1329         /* Pity C doesn't have a logical XOR operator */
1330         if (kvmppc_need_byteswap(vcpu)) {
1331                 host_swabbed = is_default_endian;
1332         } else {
1333                 host_swabbed = !is_default_endian;
1334         }
1335
1336         if (bytes > sizeof(run->mmio.data)) {
1337                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1338                        run->mmio.len);
1339         }
1340
1341         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1342         run->mmio.len = bytes;
1343         run->mmio.is_write = 1;
1344         vcpu->mmio_needed = 1;
1345         vcpu->mmio_is_write = 1;
1346
1347         if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1348                 val = dp_to_sp(val);
1349
1350         /* Store the value at the lowest bytes in 'data'. */
1351         if (!host_swabbed) {
1352                 switch (bytes) {
1353                 case 8: *(u64 *)data = val; break;
1354                 case 4: *(u32 *)data = val; break;
1355                 case 2: *(u16 *)data = val; break;
1356                 case 1: *(u8  *)data = val; break;
1357                 }
1358         } else {
1359                 switch (bytes) {
1360                 case 8: *(u64 *)data = swab64(val); break;
1361                 case 4: *(u32 *)data = swab32(val); break;
1362                 case 2: *(u16 *)data = swab16(val); break;
1363                 case 1: *(u8  *)data = val; break;
1364                 }
1365         }
1366
1367         idx = srcu_read_lock(&vcpu->kvm->srcu);
1368
1369         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1370                                bytes, &run->mmio.data);
1371
1372         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1373
1374         if (!ret) {
1375                 vcpu->mmio_needed = 0;
1376                 return EMULATE_DONE;
1377         }
1378
1379         return EMULATE_DO_MMIO;
1380 }
1381 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1382
1383 #ifdef CONFIG_VSX
1384 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1385 {
1386         u32 dword_offset, word_offset;
1387         union kvmppc_one_reg reg;
1388         int vsx_offset = 0;
1389         int copy_type = vcpu->arch.mmio_copy_type;
1390         int result = 0;
1391
1392         switch (copy_type) {
1393         case KVMPPC_VSX_COPY_DWORD:
1394                 vsx_offset =
1395                         kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1396
1397                 if (vsx_offset == -1) {
1398                         result = -1;
1399                         break;
1400                 }
1401
1402                 if (rs < 32) {
1403                         *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
1404                 } else {
1405                         reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1406                         *val = reg.vsxval[vsx_offset];
1407                 }
1408                 break;
1409
1410         case KVMPPC_VSX_COPY_WORD:
1411                 vsx_offset =
1412                         kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1413
1414                 if (vsx_offset == -1) {
1415                         result = -1;
1416                         break;
1417                 }
1418
1419                 if (rs < 32) {
1420                         dword_offset = vsx_offset / 2;
1421                         word_offset = vsx_offset % 2;
1422                         reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
1423                         *val = reg.vsx32val[word_offset];
1424                 } else {
1425                         reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1426                         *val = reg.vsx32val[vsx_offset];
1427                 }
1428                 break;
1429
1430         default:
1431                 result = -1;
1432                 break;
1433         }
1434
1435         return result;
1436 }
1437
1438 int kvmppc_handle_vsx_store(struct kvm_vcpu *vcpu,
1439                         int rs, unsigned int bytes, int is_default_endian)
1440 {
1441         u64 val;
1442         enum emulation_result emulated = EMULATE_DONE;
1443
1444         vcpu->arch.io_gpr = rs;
1445
1446         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1447         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1448                 return EMULATE_FAIL;
1449
1450         while (vcpu->arch.mmio_vsx_copy_nums) {
1451                 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1452                         return EMULATE_FAIL;
1453
1454                 emulated = kvmppc_handle_store(vcpu,
1455                          val, bytes, is_default_endian);
1456
1457                 if (emulated != EMULATE_DONE)
1458                         break;
1459
1460                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1461
1462                 vcpu->arch.mmio_vsx_copy_nums--;
1463                 vcpu->arch.mmio_vsx_offset++;
1464         }
1465
1466         return emulated;
1467 }
1468
1469 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu)
1470 {
1471         struct kvm_run *run = vcpu->run;
1472         enum emulation_result emulated = EMULATE_FAIL;
1473         int r;
1474
1475         vcpu->arch.paddr_accessed += run->mmio.len;
1476
1477         if (!vcpu->mmio_is_write) {
1478                 emulated = kvmppc_handle_vsx_load(vcpu, vcpu->arch.io_gpr,
1479                          run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1480         } else {
1481                 emulated = kvmppc_handle_vsx_store(vcpu,
1482                          vcpu->arch.io_gpr, run->mmio.len, 1);
1483         }
1484
1485         switch (emulated) {
1486         case EMULATE_DO_MMIO:
1487                 run->exit_reason = KVM_EXIT_MMIO;
1488                 r = RESUME_HOST;
1489                 break;
1490         case EMULATE_FAIL:
1491                 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1492                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1493                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1494                 r = RESUME_HOST;
1495                 break;
1496         default:
1497                 r = RESUME_GUEST;
1498                 break;
1499         }
1500         return r;
1501 }
1502 #endif /* CONFIG_VSX */
1503
1504 #ifdef CONFIG_ALTIVEC
1505 int kvmppc_handle_vmx_load(struct kvm_vcpu *vcpu,
1506                 unsigned int rt, unsigned int bytes, int is_default_endian)
1507 {
1508         enum emulation_result emulated = EMULATE_DONE;
1509
1510         if (vcpu->arch.mmio_vmx_copy_nums > 2)
1511                 return EMULATE_FAIL;
1512
1513         while (vcpu->arch.mmio_vmx_copy_nums) {
1514                 emulated = __kvmppc_handle_load(vcpu, rt, bytes,
1515                                 is_default_endian, 0);
1516
1517                 if (emulated != EMULATE_DONE)
1518                         break;
1519
1520                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1521                 vcpu->arch.mmio_vmx_copy_nums--;
1522                 vcpu->arch.mmio_vmx_offset++;
1523         }
1524
1525         return emulated;
1526 }
1527
1528 static int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
1529 {
1530         union kvmppc_one_reg reg;
1531         int vmx_offset = 0;
1532         int result = 0;
1533
1534         vmx_offset =
1535                 kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1536
1537         if (vmx_offset == -1)
1538                 return -1;
1539
1540         reg.vval = VCPU_VSX_VR(vcpu, index);
1541         *val = reg.vsxval[vmx_offset];
1542
1543         return result;
1544 }
1545
1546 static int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
1547 {
1548         union kvmppc_one_reg reg;
1549         int vmx_offset = 0;
1550         int result = 0;
1551
1552         vmx_offset =
1553                 kvmppc_get_vmx_word_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1554
1555         if (vmx_offset == -1)
1556                 return -1;
1557
1558         reg.vval = VCPU_VSX_VR(vcpu, index);
1559         *val = reg.vsx32val[vmx_offset];
1560
1561         return result;
1562 }
1563
1564 static int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
1565 {
1566         union kvmppc_one_reg reg;
1567         int vmx_offset = 0;
1568         int result = 0;
1569
1570         vmx_offset =
1571                 kvmppc_get_vmx_hword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1572
1573         if (vmx_offset == -1)
1574                 return -1;
1575
1576         reg.vval = VCPU_VSX_VR(vcpu, index);
1577         *val = reg.vsx16val[vmx_offset];
1578
1579         return result;
1580 }
1581
1582 static int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
1583 {
1584         union kvmppc_one_reg reg;
1585         int vmx_offset = 0;
1586         int result = 0;
1587
1588         vmx_offset =
1589                 kvmppc_get_vmx_byte_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1590
1591         if (vmx_offset == -1)
1592                 return -1;
1593
1594         reg.vval = VCPU_VSX_VR(vcpu, index);
1595         *val = reg.vsx8val[vmx_offset];
1596
1597         return result;
1598 }
1599
1600 int kvmppc_handle_vmx_store(struct kvm_vcpu *vcpu,
1601                 unsigned int rs, unsigned int bytes, int is_default_endian)
1602 {
1603         u64 val = 0;
1604         unsigned int index = rs & KVM_MMIO_REG_MASK;
1605         enum emulation_result emulated = EMULATE_DONE;
1606
1607         if (vcpu->arch.mmio_vmx_copy_nums > 2)
1608                 return EMULATE_FAIL;
1609
1610         vcpu->arch.io_gpr = rs;
1611
1612         while (vcpu->arch.mmio_vmx_copy_nums) {
1613                 switch (vcpu->arch.mmio_copy_type) {
1614                 case KVMPPC_VMX_COPY_DWORD:
1615                         if (kvmppc_get_vmx_dword(vcpu, index, &val) == -1)
1616                                 return EMULATE_FAIL;
1617
1618                         break;
1619                 case KVMPPC_VMX_COPY_WORD:
1620                         if (kvmppc_get_vmx_word(vcpu, index, &val) == -1)
1621                                 return EMULATE_FAIL;
1622                         break;
1623                 case KVMPPC_VMX_COPY_HWORD:
1624                         if (kvmppc_get_vmx_hword(vcpu, index, &val) == -1)
1625                                 return EMULATE_FAIL;
1626                         break;
1627                 case KVMPPC_VMX_COPY_BYTE:
1628                         if (kvmppc_get_vmx_byte(vcpu, index, &val) == -1)
1629                                 return EMULATE_FAIL;
1630                         break;
1631                 default:
1632                         return EMULATE_FAIL;
1633                 }
1634
1635                 emulated = kvmppc_handle_store(vcpu, val, bytes,
1636                                 is_default_endian);
1637                 if (emulated != EMULATE_DONE)
1638                         break;
1639
1640                 vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
1641                 vcpu->arch.mmio_vmx_copy_nums--;
1642                 vcpu->arch.mmio_vmx_offset++;
1643         }
1644
1645         return emulated;
1646 }
1647
1648 static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu)
1649 {
1650         struct kvm_run *run = vcpu->run;
1651         enum emulation_result emulated = EMULATE_FAIL;
1652         int r;
1653
1654         vcpu->arch.paddr_accessed += run->mmio.len;
1655
1656         if (!vcpu->mmio_is_write) {
1657                 emulated = kvmppc_handle_vmx_load(vcpu,
1658                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1659         } else {
1660                 emulated = kvmppc_handle_vmx_store(vcpu,
1661                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1662         }
1663
1664         switch (emulated) {
1665         case EMULATE_DO_MMIO:
1666                 run->exit_reason = KVM_EXIT_MMIO;
1667                 r = RESUME_HOST;
1668                 break;
1669         case EMULATE_FAIL:
1670                 pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
1671                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1672                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1673                 r = RESUME_HOST;
1674                 break;
1675         default:
1676                 r = RESUME_GUEST;
1677                 break;
1678         }
1679         return r;
1680 }
1681 #endif /* CONFIG_ALTIVEC */
1682
1683 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1684 {
1685         int r = 0;
1686         union kvmppc_one_reg val;
1687         int size;
1688
1689         size = one_reg_size(reg->id);
1690         if (size > sizeof(val))
1691                 return -EINVAL;
1692
1693         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1694         if (r == -EINVAL) {
1695                 r = 0;
1696                 switch (reg->id) {
1697 #ifdef CONFIG_ALTIVEC
1698                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1699                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1700                                 r = -ENXIO;
1701                                 break;
1702                         }
1703                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1704                         break;
1705                 case KVM_REG_PPC_VSCR:
1706                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1707                                 r = -ENXIO;
1708                                 break;
1709                         }
1710                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1711                         break;
1712                 case KVM_REG_PPC_VRSAVE:
1713                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
1714                         break;
1715 #endif /* CONFIG_ALTIVEC */
1716                 default:
1717                         r = -EINVAL;
1718                         break;
1719                 }
1720         }
1721
1722         if (r)
1723                 return r;
1724
1725         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1726                 r = -EFAULT;
1727
1728         return r;
1729 }
1730
1731 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1732 {
1733         int r;
1734         union kvmppc_one_reg val;
1735         int size;
1736
1737         size = one_reg_size(reg->id);
1738         if (size > sizeof(val))
1739                 return -EINVAL;
1740
1741         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1742                 return -EFAULT;
1743
1744         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1745         if (r == -EINVAL) {
1746                 r = 0;
1747                 switch (reg->id) {
1748 #ifdef CONFIG_ALTIVEC
1749                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1750                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1751                                 r = -ENXIO;
1752                                 break;
1753                         }
1754                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1755                         break;
1756                 case KVM_REG_PPC_VSCR:
1757                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1758                                 r = -ENXIO;
1759                                 break;
1760                         }
1761                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1762                         break;
1763                 case KVM_REG_PPC_VRSAVE:
1764                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1765                                 r = -ENXIO;
1766                                 break;
1767                         }
1768                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
1769                         break;
1770 #endif /* CONFIG_ALTIVEC */
1771                 default:
1772                         r = -EINVAL;
1773                         break;
1774                 }
1775         }
1776
1777         return r;
1778 }
1779
1780 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
1781 {
1782         struct kvm_run *run = vcpu->run;
1783         int r;
1784
1785         vcpu_load(vcpu);
1786
1787         if (vcpu->mmio_needed) {
1788                 vcpu->mmio_needed = 0;
1789                 if (!vcpu->mmio_is_write)
1790                         kvmppc_complete_mmio_load(vcpu);
1791 #ifdef CONFIG_VSX
1792                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1793                         vcpu->arch.mmio_vsx_copy_nums--;
1794                         vcpu->arch.mmio_vsx_offset++;
1795                 }
1796
1797                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1798                         r = kvmppc_emulate_mmio_vsx_loadstore(vcpu);
1799                         if (r == RESUME_HOST) {
1800                                 vcpu->mmio_needed = 1;
1801                                 goto out;
1802                         }
1803                 }
1804 #endif
1805 #ifdef CONFIG_ALTIVEC
1806                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1807                         vcpu->arch.mmio_vmx_copy_nums--;
1808                         vcpu->arch.mmio_vmx_offset++;
1809                 }
1810
1811                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1812                         r = kvmppc_emulate_mmio_vmx_loadstore(vcpu);
1813                         if (r == RESUME_HOST) {
1814                                 vcpu->mmio_needed = 1;
1815                                 goto out;
1816                         }
1817                 }
1818 #endif
1819         } else if (vcpu->arch.osi_needed) {
1820                 u64 *gprs = run->osi.gprs;
1821                 int i;
1822
1823                 for (i = 0; i < 32; i++)
1824                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1825                 vcpu->arch.osi_needed = 0;
1826         } else if (vcpu->arch.hcall_needed) {
1827                 int i;
1828
1829                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1830                 for (i = 0; i < 9; ++i)
1831                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1832                 vcpu->arch.hcall_needed = 0;
1833 #ifdef CONFIG_BOOKE
1834         } else if (vcpu->arch.epr_needed) {
1835                 kvmppc_set_epr(vcpu, run->epr.epr);
1836                 vcpu->arch.epr_needed = 0;
1837 #endif
1838         }
1839
1840         kvm_sigset_activate(vcpu);
1841
1842         if (run->immediate_exit)
1843                 r = -EINTR;
1844         else
1845                 r = kvmppc_vcpu_run(vcpu);
1846
1847         kvm_sigset_deactivate(vcpu);
1848
1849 #ifdef CONFIG_ALTIVEC
1850 out:
1851 #endif
1852         vcpu_put(vcpu);
1853         return r;
1854 }
1855
1856 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1857 {
1858         if (irq->irq == KVM_INTERRUPT_UNSET) {
1859                 kvmppc_core_dequeue_external(vcpu);
1860                 return 0;
1861         }
1862
1863         kvmppc_core_queue_external(vcpu, irq);
1864
1865         kvm_vcpu_kick(vcpu);
1866
1867         return 0;
1868 }
1869
1870 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1871                                      struct kvm_enable_cap *cap)
1872 {
1873         int r;
1874
1875         if (cap->flags)
1876                 return -EINVAL;
1877
1878         switch (cap->cap) {
1879         case KVM_CAP_PPC_OSI:
1880                 r = 0;
1881                 vcpu->arch.osi_enabled = true;
1882                 break;
1883         case KVM_CAP_PPC_PAPR:
1884                 r = 0;
1885                 vcpu->arch.papr_enabled = true;
1886                 break;
1887         case KVM_CAP_PPC_EPR:
1888                 r = 0;
1889                 if (cap->args[0])
1890                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1891                 else
1892                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1893                 break;
1894 #ifdef CONFIG_BOOKE
1895         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1896                 r = 0;
1897                 vcpu->arch.watchdog_enabled = true;
1898                 break;
1899 #endif
1900 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1901         case KVM_CAP_SW_TLB: {
1902                 struct kvm_config_tlb cfg;
1903                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1904
1905                 r = -EFAULT;
1906                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1907                         break;
1908
1909                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1910                 break;
1911         }
1912 #endif
1913 #ifdef CONFIG_KVM_MPIC
1914         case KVM_CAP_IRQ_MPIC: {
1915                 struct fd f;
1916                 struct kvm_device *dev;
1917
1918                 r = -EBADF;
1919                 f = fdget(cap->args[0]);
1920                 if (!f.file)
1921                         break;
1922
1923                 r = -EPERM;
1924                 dev = kvm_device_from_filp(f.file);
1925                 if (dev)
1926                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1927
1928                 fdput(f);
1929                 break;
1930         }
1931 #endif
1932 #ifdef CONFIG_KVM_XICS
1933         case KVM_CAP_IRQ_XICS: {
1934                 struct fd f;
1935                 struct kvm_device *dev;
1936
1937                 r = -EBADF;
1938                 f = fdget(cap->args[0]);
1939                 if (!f.file)
1940                         break;
1941
1942                 r = -EPERM;
1943                 dev = kvm_device_from_filp(f.file);
1944                 if (dev) {
1945                         if (xics_on_xive())
1946                                 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1947                         else
1948                                 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1949                 }
1950
1951                 fdput(f);
1952                 break;
1953         }
1954 #endif /* CONFIG_KVM_XICS */
1955 #ifdef CONFIG_KVM_XIVE
1956         case KVM_CAP_PPC_IRQ_XIVE: {
1957                 struct fd f;
1958                 struct kvm_device *dev;
1959
1960                 r = -EBADF;
1961                 f = fdget(cap->args[0]);
1962                 if (!f.file)
1963                         break;
1964
1965                 r = -ENXIO;
1966                 if (!xive_enabled())
1967                         break;
1968
1969                 r = -EPERM;
1970                 dev = kvm_device_from_filp(f.file);
1971                 if (dev)
1972                         r = kvmppc_xive_native_connect_vcpu(dev, vcpu,
1973                                                             cap->args[1]);
1974
1975                 fdput(f);
1976                 break;
1977         }
1978 #endif /* CONFIG_KVM_XIVE */
1979 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1980         case KVM_CAP_PPC_FWNMI:
1981                 r = -EINVAL;
1982                 if (!is_kvmppc_hv_enabled(vcpu->kvm))
1983                         break;
1984                 r = 0;
1985                 vcpu->kvm->arch.fwnmi_enabled = true;
1986                 break;
1987 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
1988         default:
1989                 r = -EINVAL;
1990                 break;
1991         }
1992
1993         if (!r)
1994                 r = kvmppc_sanity_check(vcpu);
1995
1996         return r;
1997 }
1998
1999 bool kvm_arch_intc_initialized(struct kvm *kvm)
2000 {
2001 #ifdef CONFIG_KVM_MPIC
2002         if (kvm->arch.mpic)
2003                 return true;
2004 #endif
2005 #ifdef CONFIG_KVM_XICS
2006         if (kvm->arch.xics || kvm->arch.xive)
2007                 return true;
2008 #endif
2009         return false;
2010 }
2011
2012 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
2013                                     struct kvm_mp_state *mp_state)
2014 {
2015         return -EINVAL;
2016 }
2017
2018 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
2019                                     struct kvm_mp_state *mp_state)
2020 {
2021         return -EINVAL;
2022 }
2023
2024 long kvm_arch_vcpu_async_ioctl(struct file *filp,
2025                                unsigned int ioctl, unsigned long arg)
2026 {
2027         struct kvm_vcpu *vcpu = filp->private_data;
2028         void __user *argp = (void __user *)arg;
2029
2030         if (ioctl == KVM_INTERRUPT) {
2031                 struct kvm_interrupt irq;
2032                 if (copy_from_user(&irq, argp, sizeof(irq)))
2033                         return -EFAULT;
2034                 return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2035         }
2036         return -ENOIOCTLCMD;
2037 }
2038
2039 long kvm_arch_vcpu_ioctl(struct file *filp,
2040                          unsigned int ioctl, unsigned long arg)
2041 {
2042         struct kvm_vcpu *vcpu = filp->private_data;
2043         void __user *argp = (void __user *)arg;
2044         long r;
2045
2046         switch (ioctl) {
2047         case KVM_ENABLE_CAP:
2048         {
2049                 struct kvm_enable_cap cap;
2050                 r = -EFAULT;
2051                 if (copy_from_user(&cap, argp, sizeof(cap)))
2052                         goto out;
2053                 vcpu_load(vcpu);
2054                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
2055                 vcpu_put(vcpu);
2056                 break;
2057         }
2058
2059         case KVM_SET_ONE_REG:
2060         case KVM_GET_ONE_REG:
2061         {
2062                 struct kvm_one_reg reg;
2063                 r = -EFAULT;
2064                 if (copy_from_user(&reg, argp, sizeof(reg)))
2065                         goto out;
2066                 if (ioctl == KVM_SET_ONE_REG)
2067                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
2068                 else
2069                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
2070                 break;
2071         }
2072
2073 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
2074         case KVM_DIRTY_TLB: {
2075                 struct kvm_dirty_tlb dirty;
2076                 r = -EFAULT;
2077                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
2078                         goto out;
2079                 vcpu_load(vcpu);
2080                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
2081                 vcpu_put(vcpu);
2082                 break;
2083         }
2084 #endif
2085         default:
2086                 r = -EINVAL;
2087         }
2088
2089 out:
2090         return r;
2091 }
2092
2093 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2094 {
2095         return VM_FAULT_SIGBUS;
2096 }
2097
2098 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
2099 {
2100         u32 inst_nop = 0x60000000;
2101 #ifdef CONFIG_KVM_BOOKE_HV
2102         u32 inst_sc1 = 0x44000022;
2103         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
2104         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
2105         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
2106         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2107 #else
2108         u32 inst_lis = 0x3c000000;
2109         u32 inst_ori = 0x60000000;
2110         u32 inst_sc = 0x44000002;
2111         u32 inst_imm_mask = 0xffff;
2112
2113         /*
2114          * The hypercall to get into KVM from within guest context is as
2115          * follows:
2116          *
2117          *    lis r0, r0, KVM_SC_MAGIC_R0@h
2118          *    ori r0, KVM_SC_MAGIC_R0@l
2119          *    sc
2120          *    nop
2121          */
2122         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
2123         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
2124         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
2125         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2126 #endif
2127
2128         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
2129
2130         return 0;
2131 }
2132
2133 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
2134                           bool line_status)
2135 {
2136         if (!irqchip_in_kernel(kvm))
2137                 return -ENXIO;
2138
2139         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
2140                                         irq_event->irq, irq_event->level,
2141                                         line_status);
2142         return 0;
2143 }
2144
2145
2146 int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
2147                             struct kvm_enable_cap *cap)
2148 {
2149         int r;
2150
2151         if (cap->flags)
2152                 return -EINVAL;
2153
2154         switch (cap->cap) {
2155 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
2156         case KVM_CAP_PPC_ENABLE_HCALL: {
2157                 unsigned long hcall = cap->args[0];
2158
2159                 r = -EINVAL;
2160                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
2161                     cap->args[1] > 1)
2162                         break;
2163                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
2164                         break;
2165                 if (cap->args[1])
2166                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
2167                 else
2168                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
2169                 r = 0;
2170                 break;
2171         }
2172         case KVM_CAP_PPC_SMT: {
2173                 unsigned long mode = cap->args[0];
2174                 unsigned long flags = cap->args[1];
2175
2176                 r = -EINVAL;
2177                 if (kvm->arch.kvm_ops->set_smt_mode)
2178                         r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
2179                 break;
2180         }
2181
2182         case KVM_CAP_PPC_NESTED_HV:
2183                 r = -EINVAL;
2184                 if (!is_kvmppc_hv_enabled(kvm) ||
2185                     !kvm->arch.kvm_ops->enable_nested)
2186                         break;
2187                 r = kvm->arch.kvm_ops->enable_nested(kvm);
2188                 break;
2189 #endif
2190 #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
2191         case KVM_CAP_PPC_SECURE_GUEST:
2192                 r = -EINVAL;
2193                 if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_svm)
2194                         break;
2195                 r = kvm->arch.kvm_ops->enable_svm(kvm);
2196                 break;
2197         case KVM_CAP_PPC_DAWR1:
2198                 r = -EINVAL;
2199                 if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_dawr1)
2200                         break;
2201                 r = kvm->arch.kvm_ops->enable_dawr1(kvm);
2202                 break;
2203 #endif
2204         default:
2205                 r = -EINVAL;
2206                 break;
2207         }
2208
2209         return r;
2210 }
2211
2212 #ifdef CONFIG_PPC_BOOK3S_64
2213 /*
2214  * These functions check whether the underlying hardware is safe
2215  * against attacks based on observing the effects of speculatively
2216  * executed instructions, and whether it supplies instructions for
2217  * use in workarounds.  The information comes from firmware, either
2218  * via the device tree on powernv platforms or from an hcall on
2219  * pseries platforms.
2220  */
2221 #ifdef CONFIG_PPC_PSERIES
2222 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2223 {
2224         struct h_cpu_char_result c;
2225         unsigned long rc;
2226
2227         if (!machine_is(pseries))
2228                 return -ENOTTY;
2229
2230         rc = plpar_get_cpu_characteristics(&c);
2231         if (rc == H_SUCCESS) {
2232                 cp->character = c.character;
2233                 cp->behaviour = c.behaviour;
2234                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2235                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2236                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2237                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2238                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2239                         KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
2240                         KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
2241                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2242                         KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2243                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2244                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2245                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2246                         KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2247         }
2248         return 0;
2249 }
2250 #else
2251 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2252 {
2253         return -ENOTTY;
2254 }
2255 #endif
2256
2257 static inline bool have_fw_feat(struct device_node *fw_features,
2258                                 const char *state, const char *name)
2259 {
2260         struct device_node *np;
2261         bool r = false;
2262
2263         np = of_get_child_by_name(fw_features, name);
2264         if (np) {
2265                 r = of_property_read_bool(np, state);
2266                 of_node_put(np);
2267         }
2268         return r;
2269 }
2270
2271 static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2272 {
2273         struct device_node *np, *fw_features;
2274         int r;
2275
2276         memset(cp, 0, sizeof(*cp));
2277         r = pseries_get_cpu_char(cp);
2278         if (r != -ENOTTY)
2279                 return r;
2280
2281         np = of_find_node_by_name(NULL, "ibm,opal");
2282         if (np) {
2283                 fw_features = of_get_child_by_name(np, "fw-features");
2284                 of_node_put(np);
2285                 if (!fw_features)
2286                         return 0;
2287                 if (have_fw_feat(fw_features, "enabled",
2288                                  "inst-spec-barrier-ori31,31,0"))
2289                         cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31;
2290                 if (have_fw_feat(fw_features, "enabled",
2291                                  "fw-bcctrl-serialized"))
2292                         cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED;
2293                 if (have_fw_feat(fw_features, "enabled",
2294                                  "inst-l1d-flush-ori30,30,0"))
2295                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30;
2296                 if (have_fw_feat(fw_features, "enabled",
2297                                  "inst-l1d-flush-trig2"))
2298                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2;
2299                 if (have_fw_feat(fw_features, "enabled",
2300                                  "fw-l1d-thread-split"))
2301                         cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV;
2302                 if (have_fw_feat(fw_features, "enabled",
2303                                  "fw-count-cache-disabled"))
2304                         cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2305                 if (have_fw_feat(fw_features, "enabled",
2306                                  "fw-count-cache-flush-bcctr2,0,0"))
2307                         cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2308                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2309                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2310                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2311                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2312                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2313                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2314                         KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2315
2316                 if (have_fw_feat(fw_features, "enabled",
2317                                  "speculation-policy-favor-security"))
2318                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY;
2319                 if (!have_fw_feat(fw_features, "disabled",
2320                                   "needs-l1d-flush-msr-pr-0-to-1"))
2321                         cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR;
2322                 if (!have_fw_feat(fw_features, "disabled",
2323                                   "needs-spec-barrier-for-bound-checks"))
2324                         cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2325                 if (have_fw_feat(fw_features, "enabled",
2326                                  "needs-count-cache-flush-on-context-switch"))
2327                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2328                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2329                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2330                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2331                         KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2332
2333                 of_node_put(fw_features);
2334         }
2335
2336         return 0;
2337 }
2338 #endif
2339
2340 long kvm_arch_vm_ioctl(struct file *filp,
2341                        unsigned int ioctl, unsigned long arg)
2342 {
2343         struct kvm *kvm __maybe_unused = filp->private_data;
2344         void __user *argp = (void __user *)arg;
2345         long r;
2346
2347         switch (ioctl) {
2348         case KVM_PPC_GET_PVINFO: {
2349                 struct kvm_ppc_pvinfo pvinfo;
2350                 memset(&pvinfo, 0, sizeof(pvinfo));
2351                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
2352                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
2353                         r = -EFAULT;
2354                         goto out;
2355                 }
2356
2357                 break;
2358         }
2359 #ifdef CONFIG_SPAPR_TCE_IOMMU
2360         case KVM_CREATE_SPAPR_TCE_64: {
2361                 struct kvm_create_spapr_tce_64 create_tce_64;
2362
2363                 r = -EFAULT;
2364                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
2365                         goto out;
2366                 if (create_tce_64.flags) {
2367                         r = -EINVAL;
2368                         goto out;
2369                 }
2370                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2371                 goto out;
2372         }
2373         case KVM_CREATE_SPAPR_TCE: {
2374                 struct kvm_create_spapr_tce create_tce;
2375                 struct kvm_create_spapr_tce_64 create_tce_64;
2376
2377                 r = -EFAULT;
2378                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
2379                         goto out;
2380
2381                 create_tce_64.liobn = create_tce.liobn;
2382                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
2383                 create_tce_64.offset = 0;
2384                 create_tce_64.size = create_tce.window_size >>
2385                                 IOMMU_PAGE_SHIFT_4K;
2386                 create_tce_64.flags = 0;
2387                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2388                 goto out;
2389         }
2390 #endif
2391 #ifdef CONFIG_PPC_BOOK3S_64
2392         case KVM_PPC_GET_SMMU_INFO: {
2393                 struct kvm_ppc_smmu_info info;
2394                 struct kvm *kvm = filp->private_data;
2395
2396                 memset(&info, 0, sizeof(info));
2397                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2398                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2399                         r = -EFAULT;
2400                 break;
2401         }
2402         case KVM_PPC_RTAS_DEFINE_TOKEN: {
2403                 struct kvm *kvm = filp->private_data;
2404
2405                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
2406                 break;
2407         }
2408         case KVM_PPC_CONFIGURE_V3_MMU: {
2409                 struct kvm *kvm = filp->private_data;
2410                 struct kvm_ppc_mmuv3_cfg cfg;
2411
2412                 r = -EINVAL;
2413                 if (!kvm->arch.kvm_ops->configure_mmu)
2414                         goto out;
2415                 r = -EFAULT;
2416                 if (copy_from_user(&cfg, argp, sizeof(cfg)))
2417                         goto out;
2418                 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
2419                 break;
2420         }
2421         case KVM_PPC_GET_RMMU_INFO: {
2422                 struct kvm *kvm = filp->private_data;
2423                 struct kvm_ppc_rmmu_info info;
2424
2425                 r = -EINVAL;
2426                 if (!kvm->arch.kvm_ops->get_rmmu_info)
2427                         goto out;
2428                 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
2429                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2430                         r = -EFAULT;
2431                 break;
2432         }
2433         case KVM_PPC_GET_CPU_CHAR: {
2434                 struct kvm_ppc_cpu_char cpuchar;
2435
2436                 r = kvmppc_get_cpu_char(&cpuchar);
2437                 if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar)))
2438                         r = -EFAULT;
2439                 break;
2440         }
2441         case KVM_PPC_SVM_OFF: {
2442                 struct kvm *kvm = filp->private_data;
2443
2444                 r = 0;
2445                 if (!kvm->arch.kvm_ops->svm_off)
2446                         goto out;
2447
2448                 r = kvm->arch.kvm_ops->svm_off(kvm);
2449                 break;
2450         }
2451         default: {
2452                 struct kvm *kvm = filp->private_data;
2453                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
2454         }
2455 #else /* CONFIG_PPC_BOOK3S_64 */
2456         default:
2457                 r = -ENOTTY;
2458 #endif
2459         }
2460 out:
2461         return r;
2462 }
2463
2464 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
2465 static unsigned long nr_lpids;
2466
2467 long kvmppc_alloc_lpid(void)
2468 {
2469         long lpid;
2470
2471         do {
2472                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
2473                 if (lpid >= nr_lpids) {
2474                         pr_err("%s: No LPIDs free\n", __func__);
2475                         return -ENOMEM;
2476                 }
2477         } while (test_and_set_bit(lpid, lpid_inuse));
2478
2479         return lpid;
2480 }
2481 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2482
2483 void kvmppc_claim_lpid(long lpid)
2484 {
2485         set_bit(lpid, lpid_inuse);
2486 }
2487 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
2488
2489 void kvmppc_free_lpid(long lpid)
2490 {
2491         clear_bit(lpid, lpid_inuse);
2492 }
2493 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2494
2495 void kvmppc_init_lpid(unsigned long nr_lpids_param)
2496 {
2497         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
2498         memset(lpid_inuse, 0, sizeof(lpid_inuse));
2499 }
2500 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2501
2502 int kvm_arch_init(void *opaque)
2503 {
2504         return 0;
2505 }
2506
2507 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);