arch/powerpc/kvm/powerpc.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License, version 2, as
   4  * published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public License
  12  * along with this program; if not, write to the Free Software
  13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14  *
  15  * Copyright IBM Corp. 2007
  16  *
  17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
  19  */
  20
  21 #include <linux/errno.h>
  22 #include <linux/err.h>
  23 #include <linux/kvm_host.h>
  24 #include <linux/vmalloc.h>
  25 #include <linux/hrtimer.h>
  26 #include <linux/sched/signal.h>
  27 #include <linux/fs.h>
  28 #include <linux/slab.h>
  29 #include <linux/file.h>
  30 #include <linux/module.h>
  31 #include <linux/irqbypass.h>
  32 #include <linux/kvm_irqfd.h>
  33 #include <asm/cputable.h>
  34 #include <linux/uaccess.h>
  35 #include <asm/kvm_ppc.h>
  36 #include <asm/cputhreads.h>
  37 #include <asm/irqflags.h>
  38 #include <asm/iommu.h>
  39 #include <asm/switch_to.h>
  40 #include <asm/xive.h>
  41 #ifdef CONFIG_PPC_PSERIES
  42 #include <asm/hvcall.h>
  43 #include <asm/plpar_wrappers.h>
  44 #endif
  45
  46 #include "timing.h"
  47 #include "irq.h"
  48 #include "../mm/mmu_decl.h"
  49
  50 #define CREATE_TRACE_POINTS
  51 #include "trace.h"
  52
  53 struct kvmppc_ops *kvmppc_hv_ops;
  54 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
  55 struct kvmppc_ops *kvmppc_pr_ops;
  56 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
  57
  58
  59 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  60 {
  61         return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
  62 }
  63
  64 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
  65 {
  66         return false;
  67 }
  68
  69 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  70 {
  71         return 1;
  72 }
  73
  74 /*
  75  * Common checks before entering the guest world.  Call with interrupts
  76  * disabled.
  77  *
  78  * returns:
  79  *
  80  * == 1 if we're ready to go into guest state
  81  * <= 0 if we need to go back to the host with return value
  82  */
  83 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
  84 {
  85         int r;
  86
  87         WARN_ON(irqs_disabled());
  88         hard_irq_disable();
  89
  90         while (true) {
  91                 if (need_resched()) {
  92                         local_irq_enable();
  93                         cond_resched();
  94                         hard_irq_disable();
  95                         continue;
  96                 }
  97
  98                 if (signal_pending(current)) {
  99                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 100                         vcpu->run->exit_reason = KVM_EXIT_INTR;
 101                         r = -EINTR;
 102                         break;
 103                 }
 104
 105                 vcpu->mode = IN_GUEST_MODE;
 106
 107                 /*
 108                  * Reading vcpu->requests must happen after setting vcpu->mode,
 109                  * so we don't miss a request because the requester sees
 110                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
 111                  * before next entering the guest (and thus doesn't IPI).
 112                  * This also orders the write to mode from any reads
 113                  * to the page tables done while the VCPU is running.
 114                  * Please see the comment in kvm_flush_remote_tlbs.
 115                  */
 116                 smp_mb();
 117
 118                 if (kvm_request_pending(vcpu)) {
 119                         /* Make sure we process requests preemptable */
 120                         local_irq_enable();
 121                         trace_kvm_check_requests(vcpu);
 122                         r = kvmppc_core_check_requests(vcpu);
 123                         hard_irq_disable();
 124                         if (r > 0)
 125                                 continue;
 126                         break;
 127                 }
 128
 129                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 130                         /* interrupts got enabled in between, so we
 131                            are back at square 1 */
 132                         continue;
 133                 }
 134
 135                 guest_enter_irqoff();
 136                 return 1;
 137         }
 138
 139         /* return to host */
 140         local_irq_enable();
 141         return r;
 142 }
 143 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
 144
 145 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 146 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
 147 {
 148         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
 149         int i;
 150
 151         shared->sprg0 = swab64(shared->sprg0);
 152         shared->sprg1 = swab64(shared->sprg1);
 153         shared->sprg2 = swab64(shared->sprg2);
 154         shared->sprg3 = swab64(shared->sprg3);
 155         shared->srr0 = swab64(shared->srr0);
 156         shared->srr1 = swab64(shared->srr1);
 157         shared->dar = swab64(shared->dar);
 158         shared->msr = swab64(shared->msr);
 159         shared->dsisr = swab32(shared->dsisr);
 160         shared->int_pending = swab32(shared->int_pending);
 161         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
 162                 shared->sr[i] = swab32(shared->sr[i]);
 163 }
 164 #endif
 165
 166 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
 167 {
 168         int nr = kvmppc_get_gpr(vcpu, 11);
 169         int r;
 170         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
 171         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
 172         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
 173         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
 174         unsigned long r2 = 0;
 175
 176         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 177                 /* 32 bit mode */
 178                 param1 &= 0xffffffff;
 179                 param2 &= 0xffffffff;
 180                 param3 &= 0xffffffff;
 181                 param4 &= 0xffffffff;
 182         }
 183
 184         switch (nr) {
 185         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
 186         {
 187 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 188                 /* Book3S can be little endian, find it out here */
 189                 int shared_big_endian = true;
 190                 if (vcpu->arch.intr_msr & MSR_LE)
 191                         shared_big_endian = false;
 192                 if (shared_big_endian != vcpu->arch.shared_big_endian)
 193                         kvmppc_swab_shared(vcpu);
 194                 vcpu->arch.shared_big_endian = shared_big_endian;
 195 #endif
 196
 197                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
 198                         /*
 199                          * Older versions of the Linux magic page code had
 200                          * a bug where they would map their trampoline code
 201                          * NX. If that's the case, remove !PR NX capability.
 202                          */
 203                         vcpu->arch.disable_kernel_nx = true;
 204                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 205                 }
 206
 207                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
 208                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
 209
 210 #ifdef CONFIG_PPC_64K_PAGES
 211                 /*
 212                  * Make sure our 4k magic page is in the same window of a 64k
 213                  * page within the guest and within the host's page.
 214                  */
 215                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
 216                     ((ulong)vcpu->arch.shared & 0xf000)) {
 217                         void *old_shared = vcpu->arch.shared;
 218                         ulong shared = (ulong)vcpu->arch.shared;
 219                         void *new_shared;
 220
 221                         shared &= PAGE_MASK;
 222                         shared |= vcpu->arch.magic_page_pa & 0xf000;
 223                         new_shared = (void*)shared;
 224                         memcpy(new_shared, old_shared, 0x1000);
 225                         vcpu->arch.shared = new_shared;
 226                 }
 227 #endif
 228
 229                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
 230
 231                 r = EV_SUCCESS;
 232                 break;
 233         }
 234         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
 235                 r = EV_SUCCESS;
 236 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
 237                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
 238 #endif
 239
 240                 /* Second return value is in r4 */
 241                 break;
 242         case EV_HCALL_TOKEN(EV_IDLE):
 243                 r = EV_SUCCESS;
 244                 kvm_vcpu_block(vcpu);
 245                 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
 246                 break;
 247         default:
 248                 r = EV_UNIMPLEMENTED;
 249                 break;
 250         }
 251
 252         kvmppc_set_gpr(vcpu, 4, r2);
 253
 254         return r;
 255 }
 256 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
 257
 258 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 259 {
 260         int r = false;
 261
 262         /* We have to know what CPU to virtualize */
 263         if (!vcpu->arch.pvr)
 264                 goto out;
 265
 266         /* PAPR only works with book3s_64 */
 267         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 268                 goto out;
 269
 270         /* HV KVM can only do PAPR mode for now */
 271         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
 272                 goto out;
 273
 274 #ifdef CONFIG_KVM_BOOKE_HV
 275         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 276                 goto out;
 277 #endif
 278
 279         r = true;
 280
 281 out:
 282         vcpu->arch.sane = r;
 283         return r ? 0 : -EINVAL;
 284 }
 285 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
 286
 287 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 288 {
 289         enum emulation_result er;
 290         int r;
 291
 292         er = kvmppc_emulate_loadstore(vcpu);
 293         switch (er) {
 294         case EMULATE_DONE:
 295                 /* Future optimization: only reload non-volatiles if they were
 296                  * actually modified. */
 297                 r = RESUME_GUEST_NV;
 298                 break;
 299         case EMULATE_AGAIN:
 300                 r = RESUME_GUEST;
 301                 break;
 302         case EMULATE_DO_MMIO:
 303                 run->exit_reason = KVM_EXIT_MMIO;
 304                 /* We must reload nonvolatiles because "update" load/store
 305                  * instructions modify register state. */
 306                 /* Future optimization: only reload non-volatiles if they were
 307                  * actually modified. */
 308                 r = RESUME_HOST_NV;
 309                 break;
 310         case EMULATE_FAIL:
 311         {
 312                 u32 last_inst;
 313
 314                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
 315                 /* XXX Deliver Program interrupt to guest. */
 316                 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
 317                 r = RESUME_HOST;
 318                 break;
 319         }
 320         default:
 321                 WARN_ON(1);
 322                 r = RESUME_GUEST;
 323         }
 324
 325         return r;
 326 }
 327 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
 328
 329 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 330               bool data)
 331 {
 332         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 333         struct kvmppc_pte pte;
 334         int r = -EINVAL;
 335
 336         vcpu->stat.st++;
 337
 338         if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->store_to_eaddr)
 339                 r = vcpu->kvm->arch.kvm_ops->store_to_eaddr(vcpu, eaddr, ptr,
 340                                                             size);
 341
 342         if ((!r) || (r == -EAGAIN))
 343                 return r;
 344
 345         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 346                          XLATE_WRITE, &pte);
 347         if (r < 0)
 348                 return r;
 349
 350         *eaddr = pte.raddr;
 351
 352         if (!pte.may_write)
 353                 return -EPERM;
 354
 355         /* Magic page override */
 356         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 357             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 358             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 359                 void *magic = vcpu->arch.shared;
 360                 magic += pte.eaddr & 0xfff;
 361                 memcpy(magic, ptr, size);
 362                 return EMULATE_DONE;
 363         }
 364
 365         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 366                 return EMULATE_DO_MMIO;
 367
 368         return EMULATE_DONE;
 369 }
 370 EXPORT_SYMBOL_GPL(kvmppc_st);
 371
 372 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 373                       bool data)
 374 {
 375         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 376         struct kvmppc_pte pte;
 377         int rc = -EINVAL;
 378
 379         vcpu->stat.ld++;
 380
 381         if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->load_from_eaddr)
 382                 rc = vcpu->kvm->arch.kvm_ops->load_from_eaddr(vcpu, eaddr, ptr,
 383                                                               size);
 384
 385         if ((!rc) || (rc == -EAGAIN))
 386                 return rc;
 387
 388         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 389                           XLATE_READ, &pte);
 390         if (rc)
 391                 return rc;
 392
 393         *eaddr = pte.raddr;
 394
 395         if (!pte.may_read)
 396                 return -EPERM;
 397
 398         if (!data && !pte.may_execute)
 399                 return -ENOEXEC;
 400
 401         /* Magic page override */
 402         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 403             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 404             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 405                 void *magic = vcpu->arch.shared;
 406                 magic += pte.eaddr & 0xfff;
 407                 memcpy(ptr, magic, size);
 408                 return EMULATE_DONE;
 409         }
 410
 411         if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
 412                 return EMULATE_DO_MMIO;
 413
 414         return EMULATE_DONE;
 415 }
 416 EXPORT_SYMBOL_GPL(kvmppc_ld);
 417
 418 int kvm_arch_hardware_enable(void)
 419 {
 420         return 0;
 421 }
 422
 423 int kvm_arch_hardware_setup(void)
 424 {
 425         return 0;
 426 }
 427
 428 int kvm_arch_check_processor_compat(void)
 429 {
 430         return kvmppc_core_check_processor_compat();
 431 }
 432
 433 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 434 {
 435         struct kvmppc_ops *kvm_ops = NULL;
 436         /*
 437          * if we have both HV and PR enabled, default is HV
 438          */
 439         if (type == 0) {
 440                 if (kvmppc_hv_ops)
 441                         kvm_ops = kvmppc_hv_ops;
 442                 else
 443                         kvm_ops = kvmppc_pr_ops;
 444                 if (!kvm_ops)
 445                         goto err_out;
 446         } else  if (type == KVM_VM_PPC_HV) {
 447                 if (!kvmppc_hv_ops)
 448                         goto err_out;
 449                 kvm_ops = kvmppc_hv_ops;
 450         } else if (type == KVM_VM_PPC_PR) {
 451                 if (!kvmppc_pr_ops)
 452                         goto err_out;
 453                 kvm_ops = kvmppc_pr_ops;
 454         } else
 455                 goto err_out;
 456
 457         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
 458                 return -ENOENT;
 459
 460         kvm->arch.kvm_ops = kvm_ops;
 461         return kvmppc_core_init_vm(kvm);
 462 err_out:
 463         return -EINVAL;
 464 }
 465
 466 bool kvm_arch_has_vcpu_debugfs(void)
 467 {
 468         return false;
 469 }
 470
 471 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
 472 {
 473         return 0;
 474 }
 475
 476 void kvm_arch_destroy_vm(struct kvm *kvm)
 477 {
 478         unsigned int i;
 479         struct kvm_vcpu *vcpu;
 480
 481 #ifdef CONFIG_KVM_XICS
 482         /*
 483          * We call kick_all_cpus_sync() to ensure that all
 484          * CPUs have executed any pending IPIs before we
 485          * continue and free VCPUs structures below.
 486          */
 487         if (is_kvmppc_hv_enabled(kvm))
 488                 kick_all_cpus_sync();
 489 #endif
 490
 491         kvm_for_each_vcpu(i, vcpu, kvm)
 492                 kvm_arch_vcpu_free(vcpu);
 493
 494         mutex_lock(&kvm->lock);
 495         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 496                 kvm->vcpus[i] = NULL;
 497
 498         atomic_set(&kvm->online_vcpus, 0);
 499
 500         kvmppc_core_destroy_vm(kvm);
 501
 502         mutex_unlock(&kvm->lock);
 503
 504         /* drop the module reference */
 505         module_put(kvm->arch.kvm_ops->owner);
 506 }
 507
 508 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 509 {
 510         int r;
 511         /* Assume we're using HV mode when the HV module is loaded */
 512         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 513
 514         if (kvm) {
 515                 /*
 516                  * Hooray - we know which VM type we're running on. Depend on
 517                  * that rather than the guess above.
 518                  */
 519                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 520         }
 521
 522         switch (ext) {
 523 #ifdef CONFIG_BOOKE
 524         case KVM_CAP_PPC_BOOKE_SREGS:
 525         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 526         case KVM_CAP_PPC_EPR:
 527 #else
 528         case KVM_CAP_PPC_SEGSTATE:
 529         case KVM_CAP_PPC_HIOR:
 530         case KVM_CAP_PPC_PAPR:
 531 #endif
 532         case KVM_CAP_PPC_UNSET_IRQ:
 533         case KVM_CAP_PPC_IRQ_LEVEL:
 534         case KVM_CAP_ENABLE_CAP:
 535         case KVM_CAP_ONE_REG:
 536         case KVM_CAP_IOEVENTFD:
 537         case KVM_CAP_DEVICE_CTRL:
 538         case KVM_CAP_IMMEDIATE_EXIT:
 539                 r = 1;
 540                 break;
 541         case KVM_CAP_PPC_PAIRED_SINGLES:
 542         case KVM_CAP_PPC_OSI:
 543         case KVM_CAP_PPC_GET_PVINFO:
 544 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 545         case KVM_CAP_SW_TLB:
 546 #endif
 547                 /* We support this only for PR */
 548                 r = !hv_enabled;
 549                 break;
 550 #ifdef CONFIG_KVM_MPIC
 551         case KVM_CAP_IRQ_MPIC:
 552                 r = 1;
 553                 break;
 554 #endif
 555
 556 #ifdef CONFIG_PPC_BOOK3S_64
 557         case KVM_CAP_SPAPR_TCE:
 558         case KVM_CAP_SPAPR_TCE_64:
 559                 r = 1;
 560                 break;
 561         case KVM_CAP_SPAPR_TCE_VFIO:
 562                 r = !!cpu_has_feature(CPU_FTR_HVMODE);
 563                 break;
 564         case KVM_CAP_PPC_RTAS:
 565         case KVM_CAP_PPC_FIXUP_HCALL:
 566         case KVM_CAP_PPC_ENABLE_HCALL:
 567 #ifdef CONFIG_KVM_XICS
 568         case KVM_CAP_IRQ_XICS:
 569 #endif
 570         case KVM_CAP_PPC_GET_CPU_CHAR:
 571                 r = 1;
 572                 break;
 573 #ifdef CONFIG_KVM_XIVE
 574         case KVM_CAP_PPC_IRQ_XIVE:
 575                 /*
 576                  * We need XIVE to be enabled on the platform (implies
 577                  * a POWER9 processor) and the PowerNV platform, as
 578                  * nested is not yet supported.
 579                  */
 580                 r = xive_enabled() && !!cpu_has_feature(CPU_FTR_HVMODE);
 581                 break;
 582 #endif
 583
 584         case KVM_CAP_PPC_ALLOC_HTAB:
 585                 r = hv_enabled;
 586                 break;
 587 #endif /* CONFIG_PPC_BOOK3S_64 */
 588 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 589         case KVM_CAP_PPC_SMT:
 590                 r = 0;
 591                 if (kvm) {
 592                         if (kvm->arch.emul_smt_mode > 1)
 593                                 r = kvm->arch.emul_smt_mode;
 594                         else
 595                                 r = kvm->arch.smt_mode;
 596                 } else if (hv_enabled) {
 597                         if (cpu_has_feature(CPU_FTR_ARCH_300))
 598                                 r = 1;
 599                         else
 600                                 r = threads_per_subcore;
 601                 }
 602                 break;
 603         case KVM_CAP_PPC_SMT_POSSIBLE:
 604                 r = 1;
 605                 if (hv_enabled) {
 606                         if (!cpu_has_feature(CPU_FTR_ARCH_300))
 607                                 r = ((threads_per_subcore << 1) - 1);
 608                         else
 609                                 /* P9 can emulate dbells, so allow any mode */
 610                                 r = 8 | 4 | 2 | 1;
 611                 }
 612                 break;
 613         case KVM_CAP_PPC_RMA:
 614                 r = 0;
 615                 break;
 616         case KVM_CAP_PPC_HWRNG:
 617                 r = kvmppc_hwrng_present();
 618                 break;
 619         case KVM_CAP_PPC_MMU_RADIX:
 620                 r = !!(hv_enabled && radix_enabled());
 621                 break;
 622         case KVM_CAP_PPC_MMU_HASH_V3:
 623                 r = !!(hv_enabled && cpu_has_feature(CPU_FTR_ARCH_300) &&
 624                        cpu_has_feature(CPU_FTR_HVMODE));
 625                 break;
 626         case KVM_CAP_PPC_NESTED_HV:
 627                 r = !!(hv_enabled && kvmppc_hv_ops->enable_nested &&
 628                        !kvmppc_hv_ops->enable_nested(NULL));
 629                 break;
 630 #endif
 631         case KVM_CAP_SYNC_MMU:
 632 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 633                 r = hv_enabled;
 634 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 635                 r = 1;
 636 #else
 637                 r = 0;
 638 #endif
 639                 break;
 640 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 641         case KVM_CAP_PPC_HTAB_FD:
 642                 r = hv_enabled;
 643                 break;
 644 #endif
 645         case KVM_CAP_NR_VCPUS:
 646                 /*
 647                  * Recommending a number of CPUs is somewhat arbitrary; we
 648                  * return the number of present CPUs for -HV (since a host
 649                  * will have secondary threads "offline"), and for other KVM
 650                  * implementations just count online CPUs.
 651                  */
 652                 if (hv_enabled)
 653                         r = num_present_cpus();
 654                 else
 655                         r = num_online_cpus();
 656                 break;
 657         case KVM_CAP_MAX_VCPUS:
 658                 r = KVM_MAX_VCPUS;
 659                 break;
 660         case KVM_CAP_MAX_VCPU_ID:
 661                 r = KVM_MAX_VCPU_ID;
 662                 break;
 663 #ifdef CONFIG_PPC_BOOK3S_64
 664         case KVM_CAP_PPC_GET_SMMU_INFO:
 665                 r = 1;
 666                 break;
 667         case KVM_CAP_SPAPR_MULTITCE:
 668                 r = 1;
 669                 break;
 670         case KVM_CAP_SPAPR_RESIZE_HPT:
 671                 r = !!hv_enabled;
 672                 break;
 673 #endif
 674 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 675         case KVM_CAP_PPC_FWNMI:
 676                 r = hv_enabled;
 677                 break;
 678 #endif
 679 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 680         case KVM_CAP_PPC_HTM:
 681                 r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
 682                      (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
 683                 break;
 684 #endif
 685         default:
 686                 r = 0;
 687                 break;
 688         }
 689         return r;
 690
 691 }
 692
 693 long kvm_arch_dev_ioctl(struct file *filp,
 694                         unsigned int ioctl, unsigned long arg)
 695 {
 696         return -EINVAL;
 697 }
 698
 699 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 700                            struct kvm_memory_slot *dont)
 701 {
 702         kvmppc_core_free_memslot(kvm, free, dont);
 703 }
 704
 705 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 706                             unsigned long npages)
 707 {
 708         return kvmppc_core_create_memslot(kvm, slot, npages);
 709 }
 710
 711 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 712                                    struct kvm_memory_slot *memslot,
 713                                    const struct kvm_userspace_memory_region *mem,
 714                                    enum kvm_mr_change change)
 715 {
 716         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 717 }
 718
 719 void kvm_arch_commit_memory_region(struct kvm *kvm,
 720                                    const struct kvm_userspace_memory_region *mem,
 721                                    const struct kvm_memory_slot *old,
 722                                    const struct kvm_memory_slot *new,
 723                                    enum kvm_mr_change change)
 724 {
 725         kvmppc_core_commit_memory_region(kvm, mem, old, new, change);
 726 }
 727
 728 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 729                                    struct kvm_memory_slot *slot)
 730 {
 731         kvmppc_core_flush_memslot(kvm, slot);
 732 }
 733
 734 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 735 {
 736         struct kvm_vcpu *vcpu;
 737         vcpu = kvmppc_core_vcpu_create(kvm, id);
 738         if (!IS_ERR(vcpu)) {
 739                 vcpu->arch.wqp = &vcpu->wq;
 740                 kvmppc_create_vcpu_debugfs(vcpu, id);
 741         }
 742         return vcpu;
 743 }
 744
 745 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 746 {
 747 }
 748
 749 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 750 {
 751         /* Make sure we're not using the vcpu anymore */
 752         hrtimer_cancel(&vcpu->arch.dec_timer);
 753
 754         kvmppc_remove_vcpu_debugfs(vcpu);
 755
 756         switch (vcpu->arch.irq_type) {
 757         case KVMPPC_IRQ_MPIC:
 758                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 759                 break;
 760         case KVMPPC_IRQ_XICS:
 761                 if (xics_on_xive())
 762                         kvmppc_xive_cleanup_vcpu(vcpu);
 763                 else
 764                         kvmppc_xics_free_icp(vcpu);
 765                 break;
 766         case KVMPPC_IRQ_XIVE:
 767                 kvmppc_xive_native_cleanup_vcpu(vcpu);
 768                 break;
 769         }
 770
 771         kvmppc_core_vcpu_free(vcpu);
 772 }
 773
 774 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 775 {
 776         kvm_arch_vcpu_free(vcpu);
 777 }
 778
 779 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 780 {
 781         return kvmppc_core_pending_dec(vcpu);
 782 }
 783
 784 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 785 {
 786         struct kvm_vcpu *vcpu;
 787
 788         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 789         kvmppc_decrementer_func(vcpu);
 790
 791         return HRTIMER_NORESTART;
 792 }
 793
 794 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 795 {
 796         int ret;
 797
 798         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 799         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 800         vcpu->arch.dec_expires = get_tb();
 801
 802 #ifdef CONFIG_KVM_EXIT_TIMING
 803         mutex_init(&vcpu->arch.exit_timing_lock);
 804 #endif
 805         ret = kvmppc_subarch_vcpu_init(vcpu);
 806         return ret;
 807 }
 808
 809 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 810 {
 811         kvmppc_mmu_destroy(vcpu);
 812         kvmppc_subarch_vcpu_uninit(vcpu);
 813 }
 814
 815 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 816 {
 817 #ifdef CONFIG_BOOKE
 818         /*
 819          * vrsave (formerly usprg0) isn't used by Linux, but may
 820          * be used by the guest.
 821          *
 822          * On non-booke this is associated with Altivec and
 823          * is handled by code in book3s.c.
 824          */
 825         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 826 #endif
 827         kvmppc_core_vcpu_load(vcpu, cpu);
 828 }
 829
 830 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 831 {
 832         kvmppc_core_vcpu_put(vcpu);
 833 #ifdef CONFIG_BOOKE
 834         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 835 #endif
 836 }
 837
 838 /*
 839  * irq_bypass_add_producer and irq_bypass_del_producer are only
 840  * useful if the architecture supports PCI passthrough.
 841  * irq_bypass_stop and irq_bypass_start are not needed and so
 842  * kvm_ops are not defined for them.
 843  */
 844 bool kvm_arch_has_irq_bypass(void)
 845 {
 846         return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
 847                 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
 848 }
 849
 850 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
 851                                      struct irq_bypass_producer *prod)
 852 {
 853         struct kvm_kernel_irqfd *irqfd =
 854                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 855         struct kvm *kvm = irqfd->kvm;
 856
 857         if (kvm->arch.kvm_ops->irq_bypass_add_producer)
 858                 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
 859
 860         return 0;
 861 }
 862
 863 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
 864                                       struct irq_bypass_producer *prod)
 865 {
 866         struct kvm_kernel_irqfd *irqfd =
 867                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 868         struct kvm *kvm = irqfd->kvm;
 869
 870         if (kvm->arch.kvm_ops->irq_bypass_del_producer)
 871                 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
 872 }
 873
 874 #ifdef CONFIG_VSX
 875 static inline int kvmppc_get_vsr_dword_offset(int index)
 876 {
 877         int offset;
 878
 879         if ((index != 0) && (index != 1))
 880                 return -1;
 881
 882 #ifdef __BIG_ENDIAN
 883         offset =  index;
 884 #else
 885         offset = 1 - index;
 886 #endif
 887
 888         return offset;
 889 }
 890
 891 static inline int kvmppc_get_vsr_word_offset(int index)
 892 {
 893         int offset;
 894
 895         if ((index > 3) || (index < 0))
 896                 return -1;
 897
 898 #ifdef __BIG_ENDIAN
 899         offset = index;
 900 #else
 901         offset = 3 - index;
 902 #endif
 903         return offset;
 904 }
 905
 906 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
 907         u64 gpr)
 908 {
 909         union kvmppc_one_reg val;
 910         int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
 911         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 912
 913         if (offset == -1)
 914                 return;
 915
 916         if (index >= 32) {
 917                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 918                 val.vsxval[offset] = gpr;
 919                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 920         } else {
 921                 VCPU_VSX_FPR(vcpu, index, offset) = gpr;
 922         }
 923 }
 924
 925 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
 926         u64 gpr)
 927 {
 928         union kvmppc_one_reg val;
 929         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 930
 931         if (index >= 32) {
 932                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 933                 val.vsxval[0] = gpr;
 934                 val.vsxval[1] = gpr;
 935                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 936         } else {
 937                 VCPU_VSX_FPR(vcpu, index, 0) = gpr;
 938                 VCPU_VSX_FPR(vcpu, index, 1) = gpr;
 939         }
 940 }
 941
 942 static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
 943         u32 gpr)
 944 {
 945         union kvmppc_one_reg val;
 946         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 947
 948         if (index >= 32) {
 949                 val.vsx32val[0] = gpr;
 950                 val.vsx32val[1] = gpr;
 951                 val.vsx32val[2] = gpr;
 952                 val.vsx32val[3] = gpr;
 953                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 954         } else {
 955                 val.vsx32val[0] = gpr;
 956                 val.vsx32val[1] = gpr;
 957                 VCPU_VSX_FPR(vcpu, index, 0) = val.vsxval[0];
 958                 VCPU_VSX_FPR(vcpu, index, 1) = val.vsxval[0];
 959         }
 960 }
 961
 962 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
 963         u32 gpr32)
 964 {
 965         union kvmppc_one_reg val;
 966         int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
 967         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 968         int dword_offset, word_offset;
 969
 970         if (offset == -1)
 971                 return;
 972
 973         if (index >= 32) {
 974                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 975                 val.vsx32val[offset] = gpr32;
 976                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 977         } else {
 978                 dword_offset = offset / 2;
 979                 word_offset = offset % 2;
 980                 val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
 981                 val.vsx32val[word_offset] = gpr32;
 982                 VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
 983         }
 984 }
 985 #endif /* CONFIG_VSX */
 986
 987 #ifdef CONFIG_ALTIVEC
 988 static inline int kvmppc_get_vmx_offset_generic(struct kvm_vcpu *vcpu,
 989                 int index, int element_size)
 990 {
 991         int offset;
 992         int elts = sizeof(vector128)/element_size;
 993
 994         if ((index < 0) || (index >= elts))
 995                 return -1;
 996
 997         if (kvmppc_need_byteswap(vcpu))
 998                 offset = elts - index - 1;
 999         else
1000                 offset = index;
1001
1002         return offset;
1003 }
1004
1005 static inline int kvmppc_get_vmx_dword_offset(struct kvm_vcpu *vcpu,
1006                 int index)
1007 {
1008         return kvmppc_get_vmx_offset_generic(vcpu, index, 8);
1009 }
1010
1011 static inline int kvmppc_get_vmx_word_offset(struct kvm_vcpu *vcpu,
1012                 int index)
1013 {
1014         return kvmppc_get_vmx_offset_generic(vcpu, index, 4);
1015 }
1016
1017 static inline int kvmppc_get_vmx_hword_offset(struct kvm_vcpu *vcpu,
1018                 int index)
1019 {
1020         return kvmppc_get_vmx_offset_generic(vcpu, index, 2);
1021 }
1022
1023 static inline int kvmppc_get_vmx_byte_offset(struct kvm_vcpu *vcpu,
1024                 int index)
1025 {
1026         return kvmppc_get_vmx_offset_generic(vcpu, index, 1);
1027 }
1028
1029
1030 static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
1031         u64 gpr)
1032 {
1033         union kvmppc_one_reg val;
1034         int offset = kvmppc_get_vmx_dword_offset(vcpu,
1035                         vcpu->arch.mmio_vmx_offset);
1036         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1037
1038         if (offset == -1)
1039                 return;
1040
1041         val.vval = VCPU_VSX_VR(vcpu, index);
1042         val.vsxval[offset] = gpr;
1043         VCPU_VSX_VR(vcpu, index) = val.vval;
1044 }
1045
1046 static inline void kvmppc_set_vmx_word(struct kvm_vcpu *vcpu,
1047         u32 gpr32)
1048 {
1049         union kvmppc_one_reg val;
1050         int offset = kvmppc_get_vmx_word_offset(vcpu,
1051                         vcpu->arch.mmio_vmx_offset);
1052         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1053
1054         if (offset == -1)
1055                 return;
1056
1057         val.vval = VCPU_VSX_VR(vcpu, index);
1058         val.vsx32val[offset] = gpr32;
1059         VCPU_VSX_VR(vcpu, index) = val.vval;
1060 }
1061
1062 static inline void kvmppc_set_vmx_hword(struct kvm_vcpu *vcpu,
1063         u16 gpr16)
1064 {
1065         union kvmppc_one_reg val;
1066         int offset = kvmppc_get_vmx_hword_offset(vcpu,
1067                         vcpu->arch.mmio_vmx_offset);
1068         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1069
1070         if (offset == -1)
1071                 return;
1072
1073         val.vval = VCPU_VSX_VR(vcpu, index);
1074         val.vsx16val[offset] = gpr16;
1075         VCPU_VSX_VR(vcpu, index) = val.vval;
1076 }
1077
1078 static inline void kvmppc_set_vmx_byte(struct kvm_vcpu *vcpu,
1079         u8 gpr8)
1080 {
1081         union kvmppc_one_reg val;
1082         int offset = kvmppc_get_vmx_byte_offset(vcpu,
1083                         vcpu->arch.mmio_vmx_offset);
1084         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1085
1086         if (offset == -1)
1087                 return;
1088
1089         val.vval = VCPU_VSX_VR(vcpu, index);
1090         val.vsx8val[offset] = gpr8;
1091         VCPU_VSX_VR(vcpu, index) = val.vval;
1092 }
1093 #endif /* CONFIG_ALTIVEC */
1094
1095 #ifdef CONFIG_PPC_FPU
1096 static inline u64 sp_to_dp(u32 fprs)
1097 {
1098         u64 fprd;
1099
1100         preempt_disable();
1101         enable_kernel_fp();
1102         asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m" (fprd) : "m" (fprs)
1103              : "fr0");
1104         preempt_enable();
1105         return fprd;
1106 }
1107
1108 static inline u32 dp_to_sp(u64 fprd)
1109 {
1110         u32 fprs;
1111
1112         preempt_disable();
1113         enable_kernel_fp();
1114         asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m" (fprs) : "m" (fprd)
1115              : "fr0");
1116         preempt_enable();
1117         return fprs;
1118 }
1119
1120 #else
1121 #define sp_to_dp(x)     (x)
1122 #define dp_to_sp(x)     (x)
1123 #endif /* CONFIG_PPC_FPU */
1124
1125 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
1126                                       struct kvm_run *run)
1127 {
1128         u64 uninitialized_var(gpr);
1129
1130         if (run->mmio.len > sizeof(gpr)) {
1131                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
1132                 return;
1133         }
1134
1135         if (!vcpu->arch.mmio_host_swabbed) {
1136                 switch (run->mmio.len) {
1137                 case 8: gpr = *(u64 *)run->mmio.data; break;
1138                 case 4: gpr = *(u32 *)run->mmio.data; break;
1139                 case 2: gpr = *(u16 *)run->mmio.data; break;
1140                 case 1: gpr = *(u8 *)run->mmio.data; break;
1141                 }
1142         } else {
1143                 switch (run->mmio.len) {
1144                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
1145                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
1146                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
1147                 case 1: gpr = *(u8 *)run->mmio.data; break;
1148                 }
1149         }
1150
1151         /* conversion between single and double precision */
1152         if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
1153                 gpr = sp_to_dp(gpr);
1154
1155         if (vcpu->arch.mmio_sign_extend) {
1156                 switch (run->mmio.len) {
1157 #ifdef CONFIG_PPC64
1158                 case 4:
1159                         gpr = (s64)(s32)gpr;
1160                         break;
1161 #endif
1162                 case 2:
1163                         gpr = (s64)(s16)gpr;
1164                         break;
1165                 case 1:
1166                         gpr = (s64)(s8)gpr;
1167                         break;
1168                 }
1169         }
1170
1171         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1172         case KVM_MMIO_REG_GPR:
1173                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1174                 break;
1175         case KVM_MMIO_REG_FPR:
1176                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1177                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);
1178
1179                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1180                 break;
1181 #ifdef CONFIG_PPC_BOOK3S
1182         case KVM_MMIO_REG_QPR:
1183                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1184                 break;
1185         case KVM_MMIO_REG_FQPR:
1186                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1187                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1188                 break;
1189 #endif
1190 #ifdef CONFIG_VSX
1191         case KVM_MMIO_REG_VSX:
1192                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1193                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);
1194
1195                 if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
1196                         kvmppc_set_vsr_dword(vcpu, gpr);
1197                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
1198                         kvmppc_set_vsr_word(vcpu, gpr);
1199                 else if (vcpu->arch.mmio_copy_type ==
1200                                 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1201                         kvmppc_set_vsr_dword_dump(vcpu, gpr);
1202                 else if (vcpu->arch.mmio_copy_type ==
1203                                 KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
1204                         kvmppc_set_vsr_word_dump(vcpu, gpr);
1205                 break;
1206 #endif
1207 #ifdef CONFIG_ALTIVEC
1208         case KVM_MMIO_REG_VMX:
1209                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1210                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);
1211
1212                 if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_DWORD)
1213                         kvmppc_set_vmx_dword(vcpu, gpr);
1214                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_WORD)
1215                         kvmppc_set_vmx_word(vcpu, gpr);
1216                 else if (vcpu->arch.mmio_copy_type ==
1217                                 KVMPPC_VMX_COPY_HWORD)
1218                         kvmppc_set_vmx_hword(vcpu, gpr);
1219                 else if (vcpu->arch.mmio_copy_type ==
1220                                 KVMPPC_VMX_COPY_BYTE)
1221                         kvmppc_set_vmx_byte(vcpu, gpr);
1222                 break;
1223 #endif
1224 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1225         case KVM_MMIO_REG_NESTED_GPR:
1226                 if (kvmppc_need_byteswap(vcpu))
1227                         gpr = swab64(gpr);
1228                 kvm_vcpu_write_guest(vcpu, vcpu->arch.nested_io_gpr, &gpr,
1229                                      sizeof(gpr));
1230                 break;
1231 #endif
1232         default:
1233                 BUG();
1234         }
1235 }
1236
1237 static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1238                                 unsigned int rt, unsigned int bytes,
1239                                 int is_default_endian, int sign_extend)
1240 {
1241         int idx, ret;
1242         bool host_swabbed;
1243
1244         /* Pity C doesn't have a logical XOR operator */
1245         if (kvmppc_need_byteswap(vcpu)) {
1246                 host_swabbed = is_default_endian;
1247         } else {
1248                 host_swabbed = !is_default_endian;
1249         }
1250
1251         if (bytes > sizeof(run->mmio.data)) {
1252                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1253                        run->mmio.len);
1254         }
1255
1256         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1257         run->mmio.len = bytes;
1258         run->mmio.is_write = 0;
1259
1260         vcpu->arch.io_gpr = rt;
1261         vcpu->arch.mmio_host_swabbed = host_swabbed;
1262         vcpu->mmio_needed = 1;
1263         vcpu->mmio_is_write = 0;
1264         vcpu->arch.mmio_sign_extend = sign_extend;
1265
1266         idx = srcu_read_lock(&vcpu->kvm->srcu);
1267
1268         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1269                               bytes, &run->mmio.data);
1270
1271         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1272
1273         if (!ret) {
1274                 kvmppc_complete_mmio_load(vcpu, run);
1275                 vcpu->mmio_needed = 0;
1276                 return EMULATE_DONE;
1277         }
1278
1279         return EMULATE_DO_MMIO;
1280 }
1281
1282 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1283                        unsigned int rt, unsigned int bytes,
1284                        int is_default_endian)
1285 {
1286         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0);
1287 }
1288 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1289
1290 /* Same as above, but sign extends */
1291 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
1292                         unsigned int rt, unsigned int bytes,
1293                         int is_default_endian)
1294 {
1295         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
1296 }
1297
1298 #ifdef CONFIG_VSX
1299 int kvmppc_handle_vsx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1300                         unsigned int rt, unsigned int bytes,
1301                         int is_default_endian, int mmio_sign_extend)
1302 {
1303         enum emulation_result emulated = EMULATE_DONE;
1304
1305         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1306         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1307                 return EMULATE_FAIL;
1308
1309         while (vcpu->arch.mmio_vsx_copy_nums) {
1310                 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1311                         is_default_endian, mmio_sign_extend);
1312
1313                 if (emulated != EMULATE_DONE)
1314                         break;
1315
1316                 vcpu->arch.paddr_accessed += run->mmio.len;
1317
1318                 vcpu->arch.mmio_vsx_copy_nums--;
1319                 vcpu->arch.mmio_vsx_offset++;
1320         }
1321         return emulated;
1322 }
1323 #endif /* CONFIG_VSX */
1324
1325 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1326                         u64 val, unsigned int bytes, int is_default_endian)
1327 {
1328         void *data = run->mmio.data;
1329         int idx, ret;
1330         bool host_swabbed;
1331
1332         /* Pity C doesn't have a logical XOR operator */
1333         if (kvmppc_need_byteswap(vcpu)) {
1334                 host_swabbed = is_default_endian;
1335         } else {
1336                 host_swabbed = !is_default_endian;
1337         }
1338
1339         if (bytes > sizeof(run->mmio.data)) {
1340                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1341                        run->mmio.len);
1342         }
1343
1344         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1345         run->mmio.len = bytes;
1346         run->mmio.is_write = 1;
1347         vcpu->mmio_needed = 1;
1348         vcpu->mmio_is_write = 1;
1349
1350         if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1351                 val = dp_to_sp(val);
1352
1353         /* Store the value at the lowest bytes in 'data'. */
1354         if (!host_swabbed) {
1355                 switch (bytes) {
1356                 case 8: *(u64 *)data = val; break;
1357                 case 4: *(u32 *)data = val; break;
1358                 case 2: *(u16 *)data = val; break;
1359                 case 1: *(u8  *)data = val; break;
1360                 }
1361         } else {
1362                 switch (bytes) {
1363                 case 8: *(u64 *)data = swab64(val); break;
1364                 case 4: *(u32 *)data = swab32(val); break;
1365                 case 2: *(u16 *)data = swab16(val); break;
1366                 case 1: *(u8  *)data = val; break;
1367                 }
1368         }
1369
1370         idx = srcu_read_lock(&vcpu->kvm->srcu);
1371
1372         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1373                                bytes, &run->mmio.data);
1374
1375         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1376
1377         if (!ret) {
1378                 vcpu->mmio_needed = 0;
1379                 return EMULATE_DONE;
1380         }
1381
1382         return EMULATE_DO_MMIO;
1383 }
1384 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1385
1386 #ifdef CONFIG_VSX
1387 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1388 {
1389         u32 dword_offset, word_offset;
1390         union kvmppc_one_reg reg;
1391         int vsx_offset = 0;
1392         int copy_type = vcpu->arch.mmio_copy_type;
1393         int result = 0;
1394
1395         switch (copy_type) {
1396         case KVMPPC_VSX_COPY_DWORD:
1397                 vsx_offset =
1398                         kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1399
1400                 if (vsx_offset == -1) {
1401                         result = -1;
1402                         break;
1403                 }
1404
1405                 if (rs < 32) {
1406                         *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
1407                 } else {
1408                         reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1409                         *val = reg.vsxval[vsx_offset];
1410                 }
1411                 break;
1412
1413         case KVMPPC_VSX_COPY_WORD:
1414                 vsx_offset =
1415                         kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1416
1417                 if (vsx_offset == -1) {
1418                         result = -1;
1419                         break;
1420                 }
1421
1422                 if (rs < 32) {
1423                         dword_offset = vsx_offset / 2;
1424                         word_offset = vsx_offset % 2;
1425                         reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
1426                         *val = reg.vsx32val[word_offset];
1427                 } else {
1428                         reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1429                         *val = reg.vsx32val[vsx_offset];
1430                 }
1431                 break;
1432
1433         default:
1434                 result = -1;
1435                 break;
1436         }
1437
1438         return result;
1439 }
1440
1441 int kvmppc_handle_vsx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1442                         int rs, unsigned int bytes, int is_default_endian)
1443 {
1444         u64 val;
1445         enum emulation_result emulated = EMULATE_DONE;
1446
1447         vcpu->arch.io_gpr = rs;
1448
1449         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1450         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1451                 return EMULATE_FAIL;
1452
1453         while (vcpu->arch.mmio_vsx_copy_nums) {
1454                 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1455                         return EMULATE_FAIL;
1456
1457                 emulated = kvmppc_handle_store(run, vcpu,
1458                          val, bytes, is_default_endian);
1459
1460                 if (emulated != EMULATE_DONE)
1461                         break;
1462
1463                 vcpu->arch.paddr_accessed += run->mmio.len;
1464
1465                 vcpu->arch.mmio_vsx_copy_nums--;
1466                 vcpu->arch.mmio_vsx_offset++;
1467         }
1468
1469         return emulated;
1470 }
1471
1472 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu,
1473                         struct kvm_run *run)
1474 {
1475         enum emulation_result emulated = EMULATE_FAIL;
1476         int r;
1477
1478         vcpu->arch.paddr_accessed += run->mmio.len;
1479
1480         if (!vcpu->mmio_is_write) {
1481                 emulated = kvmppc_handle_vsx_load(run, vcpu, vcpu->arch.io_gpr,
1482                          run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1483         } else {
1484                 emulated = kvmppc_handle_vsx_store(run, vcpu,
1485                          vcpu->arch.io_gpr, run->mmio.len, 1);
1486         }
1487
1488         switch (emulated) {
1489         case EMULATE_DO_MMIO:
1490                 run->exit_reason = KVM_EXIT_MMIO;
1491                 r = RESUME_HOST;
1492                 break;
1493         case EMULATE_FAIL:
1494                 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1495                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1496                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1497                 r = RESUME_HOST;
1498                 break;
1499         default:
1500                 r = RESUME_GUEST;
1501                 break;
1502         }
1503         return r;
1504 }
1505 #endif /* CONFIG_VSX */
1506
1507 #ifdef CONFIG_ALTIVEC
1508 int kvmppc_handle_vmx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1509                 unsigned int rt, unsigned int bytes, int is_default_endian)
1510 {
1511         enum emulation_result emulated = EMULATE_DONE;
1512
1513         if (vcpu->arch.mmio_vsx_copy_nums > 2)
1514                 return EMULATE_FAIL;
1515
1516         while (vcpu->arch.mmio_vmx_copy_nums) {
1517                 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1518                                 is_default_endian, 0);
1519
1520                 if (emulated != EMULATE_DONE)
1521                         break;
1522
1523                 vcpu->arch.paddr_accessed += run->mmio.len;
1524                 vcpu->arch.mmio_vmx_copy_nums--;
1525                 vcpu->arch.mmio_vmx_offset++;
1526         }
1527
1528         return emulated;
1529 }
1530
1531 int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
1532 {
1533         union kvmppc_one_reg reg;
1534         int vmx_offset = 0;
1535         int result = 0;
1536
1537         vmx_offset =
1538                 kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1539
1540         if (vmx_offset == -1)
1541                 return -1;
1542
1543         reg.vval = VCPU_VSX_VR(vcpu, index);
1544         *val = reg.vsxval[vmx_offset];
1545
1546         return result;
1547 }
1548
1549 int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
1550 {
1551         union kvmppc_one_reg reg;
1552         int vmx_offset = 0;
1553         int result = 0;
1554
1555         vmx_offset =
1556                 kvmppc_get_vmx_word_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1557
1558         if (vmx_offset == -1)
1559                 return -1;
1560
1561         reg.vval = VCPU_VSX_VR(vcpu, index);
1562         *val = reg.vsx32val[vmx_offset];
1563
1564         return result;
1565 }
1566
1567 int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
1568 {
1569         union kvmppc_one_reg reg;
1570         int vmx_offset = 0;
1571         int result = 0;
1572
1573         vmx_offset =
1574                 kvmppc_get_vmx_hword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1575
1576         if (vmx_offset == -1)
1577                 return -1;
1578
1579         reg.vval = VCPU_VSX_VR(vcpu, index);
1580         *val = reg.vsx16val[vmx_offset];
1581
1582         return result;
1583 }
1584
1585 int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
1586 {
1587         union kvmppc_one_reg reg;
1588         int vmx_offset = 0;
1589         int result = 0;
1590
1591         vmx_offset =
1592                 kvmppc_get_vmx_byte_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1593
1594         if (vmx_offset == -1)
1595                 return -1;
1596
1597         reg.vval = VCPU_VSX_VR(vcpu, index);
1598         *val = reg.vsx8val[vmx_offset];
1599
1600         return result;
1601 }
1602
1603 int kvmppc_handle_vmx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1604                 unsigned int rs, unsigned int bytes, int is_default_endian)
1605 {
1606         u64 val = 0;
1607         unsigned int index = rs & KVM_MMIO_REG_MASK;
1608         enum emulation_result emulated = EMULATE_DONE;
1609
1610         if (vcpu->arch.mmio_vsx_copy_nums > 2)
1611                 return EMULATE_FAIL;
1612
1613         vcpu->arch.io_gpr = rs;
1614
1615         while (vcpu->arch.mmio_vmx_copy_nums) {
1616                 switch (vcpu->arch.mmio_copy_type) {
1617                 case KVMPPC_VMX_COPY_DWORD:
1618                         if (kvmppc_get_vmx_dword(vcpu, index, &val) == -1)
1619                                 return EMULATE_FAIL;
1620
1621                         break;
1622                 case KVMPPC_VMX_COPY_WORD:
1623                         if (kvmppc_get_vmx_word(vcpu, index, &val) == -1)
1624                                 return EMULATE_FAIL;
1625                         break;
1626                 case KVMPPC_VMX_COPY_HWORD:
1627                         if (kvmppc_get_vmx_hword(vcpu, index, &val) == -1)
1628                                 return EMULATE_FAIL;
1629                         break;
1630                 case KVMPPC_VMX_COPY_BYTE:
1631                         if (kvmppc_get_vmx_byte(vcpu, index, &val) == -1)
1632                                 return EMULATE_FAIL;
1633                         break;
1634                 default:
1635                         return EMULATE_FAIL;
1636                 }
1637
1638                 emulated = kvmppc_handle_store(run, vcpu, val, bytes,
1639                                 is_default_endian);
1640                 if (emulated != EMULATE_DONE)
1641                         break;
1642
1643                 vcpu->arch.paddr_accessed += run->mmio.len;
1644                 vcpu->arch.mmio_vmx_copy_nums--;
1645                 vcpu->arch.mmio_vmx_offset++;
1646         }
1647
1648         return emulated;
1649 }
1650
1651 static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu,
1652                 struct kvm_run *run)
1653 {
1654         enum emulation_result emulated = EMULATE_FAIL;
1655         int r;
1656
1657         vcpu->arch.paddr_accessed += run->mmio.len;
1658
1659         if (!vcpu->mmio_is_write) {
1660                 emulated = kvmppc_handle_vmx_load(run, vcpu,
1661                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1662         } else {
1663                 emulated = kvmppc_handle_vmx_store(run, vcpu,
1664                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1665         }
1666
1667         switch (emulated) {
1668         case EMULATE_DO_MMIO:
1669                 run->exit_reason = KVM_EXIT_MMIO;
1670                 r = RESUME_HOST;
1671                 break;
1672         case EMULATE_FAIL:
1673                 pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
1674                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1675                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1676                 r = RESUME_HOST;
1677                 break;
1678         default:
1679                 r = RESUME_GUEST;
1680                 break;
1681         }
1682         return r;
1683 }
1684 #endif /* CONFIG_ALTIVEC */
1685
1686 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1687 {
1688         int r = 0;
1689         union kvmppc_one_reg val;
1690         int size;
1691
1692         size = one_reg_size(reg->id);
1693         if (size > sizeof(val))
1694                 return -EINVAL;
1695
1696         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1697         if (r == -EINVAL) {
1698                 r = 0;
1699                 switch (reg->id) {
1700 #ifdef CONFIG_ALTIVEC
1701                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1702                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1703                                 r = -ENXIO;
1704                                 break;
1705                         }
1706                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1707                         break;
1708                 case KVM_REG_PPC_VSCR:
1709                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1710                                 r = -ENXIO;
1711                                 break;
1712                         }
1713                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1714                         break;
1715                 case KVM_REG_PPC_VRSAVE:
1716                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
1717                         break;
1718 #endif /* CONFIG_ALTIVEC */
1719                 default:
1720                         r = -EINVAL;
1721                         break;
1722                 }
1723         }
1724
1725         if (r)
1726                 return r;
1727
1728         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1729                 r = -EFAULT;
1730
1731         return r;
1732 }
1733
1734 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1735 {
1736         int r;
1737         union kvmppc_one_reg val;
1738         int size;
1739
1740         size = one_reg_size(reg->id);
1741         if (size > sizeof(val))
1742                 return -EINVAL;
1743
1744         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1745                 return -EFAULT;
1746
1747         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1748         if (r == -EINVAL) {
1749                 r = 0;
1750                 switch (reg->id) {
1751 #ifdef CONFIG_ALTIVEC
1752                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1753                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1754                                 r = -ENXIO;
1755                                 break;
1756                         }
1757                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1758                         break;
1759                 case KVM_REG_PPC_VSCR:
1760                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1761                                 r = -ENXIO;
1762                                 break;
1763                         }
1764                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1765                         break;
1766                 case KVM_REG_PPC_VRSAVE:
1767                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1768                                 r = -ENXIO;
1769                                 break;
1770                         }
1771                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
1772                         break;
1773 #endif /* CONFIG_ALTIVEC */
1774                 default:
1775                         r = -EINVAL;
1776                         break;
1777                 }
1778         }
1779
1780         return r;
1781 }
1782
1783 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
1784 {
1785         int r;
1786
1787         vcpu_load(vcpu);
1788
1789         if (vcpu->mmio_needed) {
1790                 vcpu->mmio_needed = 0;
1791                 if (!vcpu->mmio_is_write)
1792                         kvmppc_complete_mmio_load(vcpu, run);
1793 #ifdef CONFIG_VSX
1794                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1795                         vcpu->arch.mmio_vsx_copy_nums--;
1796                         vcpu->arch.mmio_vsx_offset++;
1797                 }
1798
1799                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1800                         r = kvmppc_emulate_mmio_vsx_loadstore(vcpu, run);
1801                         if (r == RESUME_HOST) {
1802                                 vcpu->mmio_needed = 1;
1803                                 goto out;
1804                         }
1805                 }
1806 #endif
1807 #ifdef CONFIG_ALTIVEC
1808                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1809                         vcpu->arch.mmio_vmx_copy_nums--;
1810                         vcpu->arch.mmio_vmx_offset++;
1811                 }
1812
1813                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1814                         r = kvmppc_emulate_mmio_vmx_loadstore(vcpu, run);
1815                         if (r == RESUME_HOST) {
1816                                 vcpu->mmio_needed = 1;
1817                                 goto out;
1818                         }
1819                 }
1820 #endif
1821         } else if (vcpu->arch.osi_needed) {
1822                 u64 *gprs = run->osi.gprs;
1823                 int i;
1824
1825                 for (i = 0; i < 32; i++)
1826                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1827                 vcpu->arch.osi_needed = 0;
1828         } else if (vcpu->arch.hcall_needed) {
1829                 int i;
1830
1831                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1832                 for (i = 0; i < 9; ++i)
1833                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1834                 vcpu->arch.hcall_needed = 0;
1835 #ifdef CONFIG_BOOKE
1836         } else if (vcpu->arch.epr_needed) {
1837                 kvmppc_set_epr(vcpu, run->epr.epr);
1838                 vcpu->arch.epr_needed = 0;
1839 #endif
1840         }
1841
1842         kvm_sigset_activate(vcpu);
1843
1844         if (run->immediate_exit)
1845                 r = -EINTR;
1846         else
1847                 r = kvmppc_vcpu_run(run, vcpu);
1848
1849         kvm_sigset_deactivate(vcpu);
1850
1851 #ifdef CONFIG_ALTIVEC
1852 out:
1853 #endif
1854         vcpu_put(vcpu);
1855         return r;
1856 }
1857
1858 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1859 {
1860         if (irq->irq == KVM_INTERRUPT_UNSET) {
1861                 kvmppc_core_dequeue_external(vcpu);
1862                 return 0;
1863         }
1864
1865         kvmppc_core_queue_external(vcpu, irq);
1866
1867         kvm_vcpu_kick(vcpu);
1868
1869         return 0;
1870 }
1871
1872 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1873                                      struct kvm_enable_cap *cap)
1874 {
1875         int r;
1876
1877         if (cap->flags)
1878                 return -EINVAL;
1879
1880         switch (cap->cap) {
1881         case KVM_CAP_PPC_OSI:
1882                 r = 0;
1883                 vcpu->arch.osi_enabled = true;
1884                 break;
1885         case KVM_CAP_PPC_PAPR:
1886                 r = 0;
1887                 vcpu->arch.papr_enabled = true;
1888                 break;
1889         case KVM_CAP_PPC_EPR:
1890                 r = 0;
1891                 if (cap->args[0])
1892                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1893                 else
1894                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1895                 break;
1896 #ifdef CONFIG_BOOKE
1897         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1898                 r = 0;
1899                 vcpu->arch.watchdog_enabled = true;
1900                 break;
1901 #endif
1902 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1903         case KVM_CAP_SW_TLB: {
1904                 struct kvm_config_tlb cfg;
1905                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1906
1907                 r = -EFAULT;
1908                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1909                         break;
1910
1911                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1912                 break;
1913         }
1914 #endif
1915 #ifdef CONFIG_KVM_MPIC
1916         case KVM_CAP_IRQ_MPIC: {
1917                 struct fd f;
1918                 struct kvm_device *dev;
1919
1920                 r = -EBADF;
1921                 f = fdget(cap->args[0]);
1922                 if (!f.file)
1923                         break;
1924
1925                 r = -EPERM;
1926                 dev = kvm_device_from_filp(f.file);
1927                 if (dev)
1928                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1929
1930                 fdput(f);
1931                 break;
1932         }
1933 #endif
1934 #ifdef CONFIG_KVM_XICS
1935         case KVM_CAP_IRQ_XICS: {
1936                 struct fd f;
1937                 struct kvm_device *dev;
1938
1939                 r = -EBADF;
1940                 f = fdget(cap->args[0]);
1941                 if (!f.file)
1942                         break;
1943
1944                 r = -EPERM;
1945                 dev = kvm_device_from_filp(f.file);
1946                 if (dev) {
1947                         if (xics_on_xive())
1948                                 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1949                         else
1950                                 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1951                 }
1952
1953                 fdput(f);
1954                 break;
1955         }
1956 #endif /* CONFIG_KVM_XICS */
1957 #ifdef CONFIG_KVM_XIVE
1958         case KVM_CAP_PPC_IRQ_XIVE: {
1959                 struct fd f;
1960                 struct kvm_device *dev;
1961
1962                 r = -EBADF;
1963                 f = fdget(cap->args[0]);
1964                 if (!f.file)
1965                         break;
1966
1967                 r = -ENXIO;
1968                 if (!xive_enabled())
1969                         break;
1970
1971                 r = -EPERM;
1972                 dev = kvm_device_from_filp(f.file);
1973                 if (dev)
1974                         r = kvmppc_xive_native_connect_vcpu(dev, vcpu,
1975                                                             cap->args[1]);
1976
1977                 fdput(f);
1978                 break;
1979         }
1980 #endif /* CONFIG_KVM_XIVE */
1981 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1982         case KVM_CAP_PPC_FWNMI:
1983                 r = -EINVAL;
1984                 if (!is_kvmppc_hv_enabled(vcpu->kvm))
1985                         break;
1986                 r = 0;
1987                 vcpu->kvm->arch.fwnmi_enabled = true;
1988                 break;
1989 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
1990         default:
1991                 r = -EINVAL;
1992                 break;
1993         }
1994
1995         if (!r)
1996                 r = kvmppc_sanity_check(vcpu);
1997
1998         return r;
1999 }
2000
2001 bool kvm_arch_intc_initialized(struct kvm *kvm)
2002 {
2003 #ifdef CONFIG_KVM_MPIC
2004         if (kvm->arch.mpic)
2005                 return true;
2006 #endif
2007 #ifdef CONFIG_KVM_XICS
2008         if (kvm->arch.xics || kvm->arch.xive)
2009                 return true;
2010 #endif
2011         return false;
2012 }
2013
2014 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
2015                                     struct kvm_mp_state *mp_state)
2016 {
2017         return -EINVAL;
2018 }
2019
2020 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
2021                                     struct kvm_mp_state *mp_state)
2022 {
2023         return -EINVAL;
2024 }
2025
2026 long kvm_arch_vcpu_async_ioctl(struct file *filp,
2027                                unsigned int ioctl, unsigned long arg)
2028 {
2029         struct kvm_vcpu *vcpu = filp->private_data;
2030         void __user *argp = (void __user *)arg;
2031
2032         if (ioctl == KVM_INTERRUPT) {
2033                 struct kvm_interrupt irq;
2034                 if (copy_from_user(&irq, argp, sizeof(irq)))
2035                         return -EFAULT;
2036                 return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2037         }
2038         return -ENOIOCTLCMD;
2039 }
2040
2041 long kvm_arch_vcpu_ioctl(struct file *filp,
2042                          unsigned int ioctl, unsigned long arg)
2043 {
2044         struct kvm_vcpu *vcpu = filp->private_data;
2045         void __user *argp = (void __user *)arg;
2046         long r;
2047
2048         switch (ioctl) {
2049         case KVM_ENABLE_CAP:
2050         {
2051                 struct kvm_enable_cap cap;
2052                 r = -EFAULT;
2053                 vcpu_load(vcpu);
2054                 if (copy_from_user(&cap, argp, sizeof(cap)))
2055                         goto out;
2056                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
2057                 vcpu_put(vcpu);
2058                 break;
2059         }
2060
2061         case KVM_SET_ONE_REG:
2062         case KVM_GET_ONE_REG:
2063         {
2064                 struct kvm_one_reg reg;
2065                 r = -EFAULT;
2066                 if (copy_from_user(&reg, argp, sizeof(reg)))
2067                         goto out;
2068                 if (ioctl == KVM_SET_ONE_REG)
2069                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
2070                 else
2071                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
2072                 break;
2073         }
2074
2075 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
2076         case KVM_DIRTY_TLB: {
2077                 struct kvm_dirty_tlb dirty;
2078                 r = -EFAULT;
2079                 vcpu_load(vcpu);
2080                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
2081                         goto out;
2082                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
2083                 vcpu_put(vcpu);
2084                 break;
2085         }
2086 #endif
2087         default:
2088                 r = -EINVAL;
2089         }
2090
2091 out:
2092         return r;
2093 }
2094
2095 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2096 {
2097         return VM_FAULT_SIGBUS;
2098 }
2099
2100 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
2101 {
2102         u32 inst_nop = 0x60000000;
2103 #ifdef CONFIG_KVM_BOOKE_HV
2104         u32 inst_sc1 = 0x44000022;
2105         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
2106         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
2107         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
2108         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2109 #else
2110         u32 inst_lis = 0x3c000000;
2111         u32 inst_ori = 0x60000000;
2112         u32 inst_sc = 0x44000002;
2113         u32 inst_imm_mask = 0xffff;
2114
2115         /*
2116          * The hypercall to get into KVM from within guest context is as
2117          * follows:
2118          *
2119          *    lis r0, r0, KVM_SC_MAGIC_R0@h
2120          *    ori r0, KVM_SC_MAGIC_R0@l
2121          *    sc
2122          *    nop
2123          */
2124         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
2125         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
2126         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
2127         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2128 #endif
2129
2130         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
2131
2132         return 0;
2133 }
2134
2135 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
2136                           bool line_status)
2137 {
2138         if (!irqchip_in_kernel(kvm))
2139                 return -ENXIO;
2140
2141         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
2142                                         irq_event->irq, irq_event->level,
2143                                         line_status);
2144         return 0;
2145 }
2146
2147
2148 int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
2149                             struct kvm_enable_cap *cap)
2150 {
2151         int r;
2152
2153         if (cap->flags)
2154                 return -EINVAL;
2155
2156         switch (cap->cap) {
2157 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
2158         case KVM_CAP_PPC_ENABLE_HCALL: {
2159                 unsigned long hcall = cap->args[0];
2160
2161                 r = -EINVAL;
2162                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
2163                     cap->args[1] > 1)
2164                         break;
2165                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
2166                         break;
2167                 if (cap->args[1])
2168                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
2169                 else
2170                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
2171                 r = 0;
2172                 break;
2173         }
2174         case KVM_CAP_PPC_SMT: {
2175                 unsigned long mode = cap->args[0];
2176                 unsigned long flags = cap->args[1];
2177
2178                 r = -EINVAL;
2179                 if (kvm->arch.kvm_ops->set_smt_mode)
2180                         r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
2181                 break;
2182         }
2183
2184         case KVM_CAP_PPC_NESTED_HV:
2185                 r = -EINVAL;
2186                 if (!is_kvmppc_hv_enabled(kvm) ||
2187                     !kvm->arch.kvm_ops->enable_nested)
2188                         break;
2189                 r = kvm->arch.kvm_ops->enable_nested(kvm);
2190                 break;
2191 #endif
2192         default:
2193                 r = -EINVAL;
2194                 break;
2195         }
2196
2197         return r;
2198 }
2199
2200 #ifdef CONFIG_PPC_BOOK3S_64
2201 /*
2202  * These functions check whether the underlying hardware is safe
2203  * against attacks based on observing the effects of speculatively
2204  * executed instructions, and whether it supplies instructions for
2205  * use in workarounds.  The information comes from firmware, either
2206  * via the device tree on powernv platforms or from an hcall on
2207  * pseries platforms.
2208  */
2209 #ifdef CONFIG_PPC_PSERIES
2210 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2211 {
2212         struct h_cpu_char_result c;
2213         unsigned long rc;
2214
2215         if (!machine_is(pseries))
2216                 return -ENOTTY;
2217
2218         rc = plpar_get_cpu_characteristics(&c);
2219         if (rc == H_SUCCESS) {
2220                 cp->character = c.character;
2221                 cp->behaviour = c.behaviour;
2222                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2223                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2224                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2225                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2226                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2227                         KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
2228                         KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
2229                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2230                         KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2231                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2232                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2233                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2234                         KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2235         }
2236         return 0;
2237 }
2238 #else
2239 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2240 {
2241         return -ENOTTY;
2242 }
2243 #endif
2244
2245 static inline bool have_fw_feat(struct device_node *fw_features,
2246                                 const char *state, const char *name)
2247 {
2248         struct device_node *np;
2249         bool r = false;
2250
2251         np = of_get_child_by_name(fw_features, name);
2252         if (np) {
2253                 r = of_property_read_bool(np, state);
2254                 of_node_put(np);
2255         }
2256         return r;
2257 }
2258
2259 static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2260 {
2261         struct device_node *np, *fw_features;
2262         int r;
2263
2264         memset(cp, 0, sizeof(*cp));
2265         r = pseries_get_cpu_char(cp);
2266         if (r != -ENOTTY)
2267                 return r;
2268
2269         np = of_find_node_by_name(NULL, "ibm,opal");
2270         if (np) {
2271                 fw_features = of_get_child_by_name(np, "fw-features");
2272                 of_node_put(np);
2273                 if (!fw_features)
2274                         return 0;
2275                 if (have_fw_feat(fw_features, "enabled",
2276                                  "inst-spec-barrier-ori31,31,0"))
2277                         cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31;
2278                 if (have_fw_feat(fw_features, "enabled",
2279                                  "fw-bcctrl-serialized"))
2280                         cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED;
2281                 if (have_fw_feat(fw_features, "enabled",
2282                                  "inst-l1d-flush-ori30,30,0"))
2283                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30;
2284                 if (have_fw_feat(fw_features, "enabled",
2285                                  "inst-l1d-flush-trig2"))
2286                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2;
2287                 if (have_fw_feat(fw_features, "enabled",
2288                                  "fw-l1d-thread-split"))
2289                         cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV;
2290                 if (have_fw_feat(fw_features, "enabled",
2291                                  "fw-count-cache-disabled"))
2292                         cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2293                 if (have_fw_feat(fw_features, "enabled",
2294                                  "fw-count-cache-flush-bcctr2,0,0"))
2295                         cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2296                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2297                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2298                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2299                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2300                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2301                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2302                         KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2303
2304                 if (have_fw_feat(fw_features, "enabled",
2305                                  "speculation-policy-favor-security"))
2306                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY;
2307                 if (!have_fw_feat(fw_features, "disabled",
2308                                   "needs-l1d-flush-msr-pr-0-to-1"))
2309                         cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR;
2310                 if (!have_fw_feat(fw_features, "disabled",
2311                                   "needs-spec-barrier-for-bound-checks"))
2312                         cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2313                 if (have_fw_feat(fw_features, "enabled",
2314                                  "needs-count-cache-flush-on-context-switch"))
2315                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2316                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2317                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2318                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2319                         KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2320
2321                 of_node_put(fw_features);
2322         }
2323
2324         return 0;
2325 }
2326 #endif
2327
2328 long kvm_arch_vm_ioctl(struct file *filp,
2329                        unsigned int ioctl, unsigned long arg)
2330 {
2331         struct kvm *kvm __maybe_unused = filp->private_data;
2332         void __user *argp = (void __user *)arg;
2333         long r;
2334
2335         switch (ioctl) {
2336         case KVM_PPC_GET_PVINFO: {
2337                 struct kvm_ppc_pvinfo pvinfo;
2338                 memset(&pvinfo, 0, sizeof(pvinfo));
2339                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
2340                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
2341                         r = -EFAULT;
2342                         goto out;
2343                 }
2344
2345                 break;
2346         }
2347 #ifdef CONFIG_SPAPR_TCE_IOMMU
2348         case KVM_CREATE_SPAPR_TCE_64: {
2349                 struct kvm_create_spapr_tce_64 create_tce_64;
2350
2351                 r = -EFAULT;
2352                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
2353                         goto out;
2354                 if (create_tce_64.flags) {
2355                         r = -EINVAL;
2356                         goto out;
2357                 }
2358                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2359                 goto out;
2360         }
2361         case KVM_CREATE_SPAPR_TCE: {
2362                 struct kvm_create_spapr_tce create_tce;
2363                 struct kvm_create_spapr_tce_64 create_tce_64;
2364
2365                 r = -EFAULT;
2366                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
2367                         goto out;
2368
2369                 create_tce_64.liobn = create_tce.liobn;
2370                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
2371                 create_tce_64.offset = 0;
2372                 create_tce_64.size = create_tce.window_size >>
2373                                 IOMMU_PAGE_SHIFT_4K;
2374                 create_tce_64.flags = 0;
2375                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2376                 goto out;
2377         }
2378 #endif
2379 #ifdef CONFIG_PPC_BOOK3S_64
2380         case KVM_PPC_GET_SMMU_INFO: {
2381                 struct kvm_ppc_smmu_info info;
2382                 struct kvm *kvm = filp->private_data;
2383
2384                 memset(&info, 0, sizeof(info));
2385                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2386                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2387                         r = -EFAULT;
2388                 break;
2389         }
2390         case KVM_PPC_RTAS_DEFINE_TOKEN: {
2391                 struct kvm *kvm = filp->private_data;
2392
2393                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
2394                 break;
2395         }
2396         case KVM_PPC_CONFIGURE_V3_MMU: {
2397                 struct kvm *kvm = filp->private_data;
2398                 struct kvm_ppc_mmuv3_cfg cfg;
2399
2400                 r = -EINVAL;
2401                 if (!kvm->arch.kvm_ops->configure_mmu)
2402                         goto out;
2403                 r = -EFAULT;
2404                 if (copy_from_user(&cfg, argp, sizeof(cfg)))
2405                         goto out;
2406                 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
2407                 break;
2408         }
2409         case KVM_PPC_GET_RMMU_INFO: {
2410                 struct kvm *kvm = filp->private_data;
2411                 struct kvm_ppc_rmmu_info info;
2412
2413                 r = -EINVAL;
2414                 if (!kvm->arch.kvm_ops->get_rmmu_info)
2415                         goto out;
2416                 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
2417                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2418                         r = -EFAULT;
2419                 break;
2420         }
2421         case KVM_PPC_GET_CPU_CHAR: {
2422                 struct kvm_ppc_cpu_char cpuchar;
2423
2424                 r = kvmppc_get_cpu_char(&cpuchar);
2425                 if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar)))
2426                         r = -EFAULT;
2427                 break;
2428         }
2429         default: {
2430                 struct kvm *kvm = filp->private_data;
2431                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
2432         }
2433 #else /* CONFIG_PPC_BOOK3S_64 */
2434         default:
2435                 r = -ENOTTY;
2436 #endif
2437         }
2438 out:
2439         return r;
2440 }
2441
2442 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
2443 static unsigned long nr_lpids;
2444
2445 long kvmppc_alloc_lpid(void)
2446 {
2447         long lpid;
2448
2449         do {
2450                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
2451                 if (lpid >= nr_lpids) {
2452                         pr_err("%s: No LPIDs free\n", __func__);
2453                         return -ENOMEM;
2454                 }
2455         } while (test_and_set_bit(lpid, lpid_inuse));
2456
2457         return lpid;
2458 }
2459 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2460
2461 void kvmppc_claim_lpid(long lpid)
2462 {
2463         set_bit(lpid, lpid_inuse);
2464 }
2465 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
2466
2467 void kvmppc_free_lpid(long lpid)
2468 {
2469         clear_bit(lpid, lpid_inuse);
2470 }
2471 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2472
2473 void kvmppc_init_lpid(unsigned long nr_lpids_param)
2474 {
2475         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
2476         memset(lpid_inuse, 0, sizeof(lpid_inuse));
2477 }
2478 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2479
2480 int kvm_arch_init(void *opaque)
2481 {
2482         return 0;
2483 }
2484
2485 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);