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/fs.h>
  27 #include <linux/slab.h>
  28 #include <linux/file.h>
  29 #include <linux/module.h>
  30 #include <asm/cputable.h>
  31 #include <asm/uaccess.h>
  32 #include <asm/kvm_ppc.h>
  33 #include <asm/tlbflush.h>
  34 #include <asm/cputhreads.h>
  35 #include <asm/irqflags.h>
  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) ||
  52                v->requests;
  53 }
  54
  55 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  56 {
  57         return 1;
  58 }
  59
  60 /*
  61  * Common checks before entering the guest world.  Call with interrupts
  62  * disabled.
  63  *
  64  * returns:
  65  *
  66  * == 1 if we're ready to go into guest state
  67  * <= 0 if we need to go back to the host with return value
  68  */
  69 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
  70 {
  71         int r;
  72
  73         WARN_ON(irqs_disabled());
  74         hard_irq_disable();
  75
  76         while (true) {
  77                 if (need_resched()) {
  78                         local_irq_enable();
  79                         cond_resched();
  80                         hard_irq_disable();
  81                         continue;
  82                 }
  83
  84                 if (signal_pending(current)) {
  85                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
  86                         vcpu->run->exit_reason = KVM_EXIT_INTR;
  87                         r = -EINTR;
  88                         break;
  89                 }
  90
  91                 vcpu->mode = IN_GUEST_MODE;
  92
  93                 /*
  94                  * Reading vcpu->requests must happen after setting vcpu->mode,
  95                  * so we don't miss a request because the requester sees
  96                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
  97                  * before next entering the guest (and thus doesn't IPI).
  98                  */
  99                 smp_mb();
 100
 101                 if (vcpu->requests) {
 102                         /* Make sure we process requests preemptable */
 103                         local_irq_enable();
 104                         trace_kvm_check_requests(vcpu);
 105                         r = kvmppc_core_check_requests(vcpu);
 106                         hard_irq_disable();
 107                         if (r > 0)
 108                                 continue;
 109                         break;
 110                 }
 111
 112                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 113                         /* interrupts got enabled in between, so we
 114                            are back at square 1 */
 115                         continue;
 116                 }
 117
 118                 kvm_guest_enter();
 119                 return 1;
 120         }
 121
 122         /* return to host */
 123         local_irq_enable();
 124         return r;
 125 }
 126 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
 127
 128 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 129 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
 130 {
 131         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
 132         int i;
 133
 134         shared->sprg0 = swab64(shared->sprg0);
 135         shared->sprg1 = swab64(shared->sprg1);
 136         shared->sprg2 = swab64(shared->sprg2);
 137         shared->sprg3 = swab64(shared->sprg3);
 138         shared->srr0 = swab64(shared->srr0);
 139         shared->srr1 = swab64(shared->srr1);
 140         shared->dar = swab64(shared->dar);
 141         shared->msr = swab64(shared->msr);
 142         shared->dsisr = swab32(shared->dsisr);
 143         shared->int_pending = swab32(shared->int_pending);
 144         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
 145                 shared->sr[i] = swab32(shared->sr[i]);
 146 }
 147 #endif
 148
 149 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
 150 {
 151         int nr = kvmppc_get_gpr(vcpu, 11);
 152         int r;
 153         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
 154         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
 155         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
 156         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
 157         unsigned long r2 = 0;
 158
 159         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 160                 /* 32 bit mode */
 161                 param1 &= 0xffffffff;
 162                 param2 &= 0xffffffff;
 163                 param3 &= 0xffffffff;
 164                 param4 &= 0xffffffff;
 165         }
 166
 167         switch (nr) {
 168         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
 169         {
 170 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 171                 /* Book3S can be little endian, find it out here */
 172                 int shared_big_endian = true;
 173                 if (vcpu->arch.intr_msr & MSR_LE)
 174                         shared_big_endian = false;
 175                 if (shared_big_endian != vcpu->arch.shared_big_endian)
 176                         kvmppc_swab_shared(vcpu);
 177                 vcpu->arch.shared_big_endian = shared_big_endian;
 178 #endif
 179
 180                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
 181                         /*
 182                          * Older versions of the Linux magic page code had
 183                          * a bug where they would map their trampoline code
 184                          * NX. If that's the case, remove !PR NX capability.
 185                          */
 186                         vcpu->arch.disable_kernel_nx = true;
 187                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 188                 }
 189
 190                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
 191                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
 192
 193 #ifdef CONFIG_PPC_64K_PAGES
 194                 /*
 195                  * Make sure our 4k magic page is in the same window of a 64k
 196                  * page within the guest and within the host's page.
 197                  */
 198                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
 199                     ((ulong)vcpu->arch.shared & 0xf000)) {
 200                         void *old_shared = vcpu->arch.shared;
 201                         ulong shared = (ulong)vcpu->arch.shared;
 202                         void *new_shared;
 203
 204                         shared &= PAGE_MASK;
 205                         shared |= vcpu->arch.magic_page_pa & 0xf000;
 206                         new_shared = (void*)shared;
 207                         memcpy(new_shared, old_shared, 0x1000);
 208                         vcpu->arch.shared = new_shared;
 209                 }
 210 #endif
 211
 212                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
 213
 214                 r = EV_SUCCESS;
 215                 break;
 216         }
 217         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
 218                 r = EV_SUCCESS;
 219 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
 220                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
 221 #endif
 222
 223                 /* Second return value is in r4 */
 224                 break;
 225         case EV_HCALL_TOKEN(EV_IDLE):
 226                 r = EV_SUCCESS;
 227                 kvm_vcpu_block(vcpu);
 228                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 229                 break;
 230         default:
 231                 r = EV_UNIMPLEMENTED;
 232                 break;
 233         }
 234
 235         kvmppc_set_gpr(vcpu, 4, r2);
 236
 237         return r;
 238 }
 239 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
 240
 241 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 242 {
 243         int r = false;
 244
 245         /* We have to know what CPU to virtualize */
 246         if (!vcpu->arch.pvr)
 247                 goto out;
 248
 249         /* PAPR only works with book3s_64 */
 250         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 251                 goto out;
 252
 253         /* HV KVM can only do PAPR mode for now */
 254         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
 255                 goto out;
 256
 257 #ifdef CONFIG_KVM_BOOKE_HV
 258         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 259                 goto out;
 260 #endif
 261
 262         r = true;
 263
 264 out:
 265         vcpu->arch.sane = r;
 266         return r ? 0 : -EINVAL;
 267 }
 268 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
 269
 270 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 271 {
 272         enum emulation_result er;
 273         int r;
 274
 275         er = kvmppc_emulate_instruction(run, vcpu);
 276         switch (er) {
 277         case EMULATE_DONE:
 278                 /* Future optimization: only reload non-volatiles if they were
 279                  * actually modified. */
 280                 r = RESUME_GUEST_NV;
 281                 break;
 282         case EMULATE_AGAIN:
 283                 r = RESUME_GUEST;
 284                 break;
 285         case EMULATE_DO_MMIO:
 286                 run->exit_reason = KVM_EXIT_MMIO;
 287                 /* We must reload nonvolatiles because "update" load/store
 288                  * instructions modify register state. */
 289                 /* Future optimization: only reload non-volatiles if they were
 290                  * actually modified. */
 291                 r = RESUME_HOST_NV;
 292                 break;
 293         case EMULATE_FAIL:
 294         {
 295                 u32 last_inst;
 296
 297                 kvmppc_get_last_inst(vcpu, false, &last_inst);
 298                 /* XXX Deliver Program interrupt to guest. */
 299                 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
 300                 r = RESUME_HOST;
 301                 break;
 302         }
 303         default:
 304                 WARN_ON(1);
 305                 r = RESUME_GUEST;
 306         }
 307
 308         return r;
 309 }
 310 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
 311
 312 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 313               bool data)
 314 {
 315         struct kvmppc_pte pte;
 316         int r;
 317
 318         vcpu->stat.st++;
 319
 320         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 321                          XLATE_WRITE, &pte);
 322         if (r < 0)
 323                 return r;
 324
 325         *eaddr = pte.raddr;
 326
 327         if (!pte.may_write)
 328                 return -EPERM;
 329
 330         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 331                 return EMULATE_DO_MMIO;
 332
 333         return EMULATE_DONE;
 334 }
 335 EXPORT_SYMBOL_GPL(kvmppc_st);
 336
 337 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 338                       bool data)
 339 {
 340         struct kvmppc_pte pte;
 341         int rc;
 342
 343         vcpu->stat.ld++;
 344
 345         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 346                           XLATE_READ, &pte);
 347         if (rc)
 348                 return rc;
 349
 350         *eaddr = pte.raddr;
 351
 352         if (!pte.may_read)
 353                 return -EPERM;
 354
 355         if (!data && !pte.may_execute)
 356                 return -ENOEXEC;
 357
 358         if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
 359                 return EMULATE_DO_MMIO;
 360
 361         return EMULATE_DONE;
 362 }
 363 EXPORT_SYMBOL_GPL(kvmppc_ld);
 364
 365 int kvm_arch_hardware_enable(void *garbage)
 366 {
 367         return 0;
 368 }
 369
 370 void kvm_arch_hardware_disable(void *garbage)
 371 {
 372 }
 373
 374 int kvm_arch_hardware_setup(void)
 375 {
 376         return 0;
 377 }
 378
 379 void kvm_arch_hardware_unsetup(void)
 380 {
 381 }
 382
 383 void kvm_arch_check_processor_compat(void *rtn)
 384 {
 385         *(int *)rtn = kvmppc_core_check_processor_compat();
 386 }
 387
 388 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 389 {
 390         struct kvmppc_ops *kvm_ops = NULL;
 391         /*
 392          * if we have both HV and PR enabled, default is HV
 393          */
 394         if (type == 0) {
 395                 if (kvmppc_hv_ops)
 396                         kvm_ops = kvmppc_hv_ops;
 397                 else
 398                         kvm_ops = kvmppc_pr_ops;
 399                 if (!kvm_ops)
 400                         goto err_out;
 401         } else  if (type == KVM_VM_PPC_HV) {
 402                 if (!kvmppc_hv_ops)
 403                         goto err_out;
 404                 kvm_ops = kvmppc_hv_ops;
 405         } else if (type == KVM_VM_PPC_PR) {
 406                 if (!kvmppc_pr_ops)
 407                         goto err_out;
 408                 kvm_ops = kvmppc_pr_ops;
 409         } else
 410                 goto err_out;
 411
 412         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
 413                 return -ENOENT;
 414
 415         kvm->arch.kvm_ops = kvm_ops;
 416         return kvmppc_core_init_vm(kvm);
 417 err_out:
 418         return -EINVAL;
 419 }
 420
 421 void kvm_arch_destroy_vm(struct kvm *kvm)
 422 {
 423         unsigned int i;
 424         struct kvm_vcpu *vcpu;
 425
 426         kvm_for_each_vcpu(i, vcpu, kvm)
 427                 kvm_arch_vcpu_free(vcpu);
 428
 429         mutex_lock(&kvm->lock);
 430         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 431                 kvm->vcpus[i] = NULL;
 432
 433         atomic_set(&kvm->online_vcpus, 0);
 434
 435         kvmppc_core_destroy_vm(kvm);
 436
 437         mutex_unlock(&kvm->lock);
 438
 439         /* drop the module reference */
 440         module_put(kvm->arch.kvm_ops->owner);
 441 }
 442
 443 void kvm_arch_sync_events(struct kvm *kvm)
 444 {
 445 }
 446
 447 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 448 {
 449         int r;
 450         /* Assume we're using HV mode when the HV module is loaded */
 451         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 452
 453         if (kvm) {
 454                 /*
 455                  * Hooray - we know which VM type we're running on. Depend on
 456                  * that rather than the guess above.
 457                  */
 458                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 459         }
 460
 461         switch (ext) {
 462 #ifdef CONFIG_BOOKE
 463         case KVM_CAP_PPC_BOOKE_SREGS:
 464         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 465         case KVM_CAP_PPC_EPR:
 466 #else
 467         case KVM_CAP_PPC_SEGSTATE:
 468         case KVM_CAP_PPC_HIOR:
 469         case KVM_CAP_PPC_PAPR:
 470 #endif
 471         case KVM_CAP_PPC_UNSET_IRQ:
 472         case KVM_CAP_PPC_IRQ_LEVEL:
 473         case KVM_CAP_ENABLE_CAP:
 474         case KVM_CAP_ENABLE_CAP_VM:
 475         case KVM_CAP_ONE_REG:
 476         case KVM_CAP_IOEVENTFD:
 477         case KVM_CAP_DEVICE_CTRL:
 478                 r = 1;
 479                 break;
 480         case KVM_CAP_PPC_PAIRED_SINGLES:
 481         case KVM_CAP_PPC_OSI:
 482         case KVM_CAP_PPC_GET_PVINFO:
 483 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 484         case KVM_CAP_SW_TLB:
 485 #endif
 486                 /* We support this only for PR */
 487                 r = !hv_enabled;
 488                 break;
 489 #ifdef CONFIG_KVM_MMIO
 490         case KVM_CAP_COALESCED_MMIO:
 491                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 492                 break;
 493 #endif
 494 #ifdef CONFIG_KVM_MPIC
 495         case KVM_CAP_IRQ_MPIC:
 496                 r = 1;
 497                 break;
 498 #endif
 499
 500 #ifdef CONFIG_PPC_BOOK3S_64
 501         case KVM_CAP_SPAPR_TCE:
 502         case KVM_CAP_PPC_ALLOC_HTAB:
 503         case KVM_CAP_PPC_RTAS:
 504         case KVM_CAP_PPC_FIXUP_HCALL:
 505         case KVM_CAP_PPC_ENABLE_HCALL:
 506 #ifdef CONFIG_KVM_XICS
 507         case KVM_CAP_IRQ_XICS:
 508 #endif
 509                 r = 1;
 510                 break;
 511 #endif /* CONFIG_PPC_BOOK3S_64 */
 512 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 513         case KVM_CAP_PPC_SMT:
 514                 if (hv_enabled)
 515                         r = threads_per_subcore;
 516                 else
 517                         r = 0;
 518                 break;
 519         case KVM_CAP_PPC_RMA:
 520                 r = hv_enabled;
 521                 /* PPC970 requires an RMA */
 522                 if (r && cpu_has_feature(CPU_FTR_ARCH_201))
 523                         r = 2;
 524                 break;
 525 #endif
 526         case KVM_CAP_SYNC_MMU:
 527 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 528                 if (hv_enabled)
 529                         r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
 530                 else
 531                         r = 0;
 532 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 533                 r = 1;
 534 #else
 535                 r = 0;
 536 #endif
 537                 break;
 538 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 539         case KVM_CAP_PPC_HTAB_FD:
 540                 r = hv_enabled;
 541                 break;
 542 #endif
 543         case KVM_CAP_NR_VCPUS:
 544                 /*
 545                  * Recommending a number of CPUs is somewhat arbitrary; we
 546                  * return the number of present CPUs for -HV (since a host
 547                  * will have secondary threads "offline"), and for other KVM
 548                  * implementations just count online CPUs.
 549                  */
 550                 if (hv_enabled)
 551                         r = num_present_cpus();
 552                 else
 553                         r = num_online_cpus();
 554                 break;
 555         case KVM_CAP_MAX_VCPUS:
 556                 r = KVM_MAX_VCPUS;
 557                 break;
 558 #ifdef CONFIG_PPC_BOOK3S_64
 559         case KVM_CAP_PPC_GET_SMMU_INFO:
 560                 r = 1;
 561                 break;
 562 #endif
 563         default:
 564                 r = 0;
 565                 break;
 566         }
 567         return r;
 568
 569 }
 570
 571 long kvm_arch_dev_ioctl(struct file *filp,
 572                         unsigned int ioctl, unsigned long arg)
 573 {
 574         return -EINVAL;
 575 }
 576
 577 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 578                            struct kvm_memory_slot *dont)
 579 {
 580         kvmppc_core_free_memslot(kvm, free, dont);
 581 }
 582
 583 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 584                             unsigned long npages)
 585 {
 586         return kvmppc_core_create_memslot(kvm, slot, npages);
 587 }
 588
 589 void kvm_arch_memslots_updated(struct kvm *kvm)
 590 {
 591 }
 592
 593 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 594                                    struct kvm_memory_slot *memslot,
 595                                    struct kvm_userspace_memory_region *mem,
 596                                    enum kvm_mr_change change)
 597 {
 598         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 599 }
 600
 601 void kvm_arch_commit_memory_region(struct kvm *kvm,
 602                                    struct kvm_userspace_memory_region *mem,
 603                                    const struct kvm_memory_slot *old,
 604                                    enum kvm_mr_change change)
 605 {
 606         kvmppc_core_commit_memory_region(kvm, mem, old);
 607 }
 608
 609 void kvm_arch_flush_shadow_all(struct kvm *kvm)
 610 {
 611 }
 612
 613 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 614                                    struct kvm_memory_slot *slot)
 615 {
 616         kvmppc_core_flush_memslot(kvm, slot);
 617 }
 618
 619 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 620 {
 621         struct kvm_vcpu *vcpu;
 622         vcpu = kvmppc_core_vcpu_create(kvm, id);
 623         if (!IS_ERR(vcpu)) {
 624                 vcpu->arch.wqp = &vcpu->wq;
 625                 kvmppc_create_vcpu_debugfs(vcpu, id);
 626         }
 627         return vcpu;
 628 }
 629
 630 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 631 {
 632         return 0;
 633 }
 634
 635 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 636 {
 637         /* Make sure we're not using the vcpu anymore */
 638         hrtimer_cancel(&vcpu->arch.dec_timer);
 639         tasklet_kill(&vcpu->arch.tasklet);
 640
 641         kvmppc_remove_vcpu_debugfs(vcpu);
 642
 643         switch (vcpu->arch.irq_type) {
 644         case KVMPPC_IRQ_MPIC:
 645                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 646                 break;
 647         case KVMPPC_IRQ_XICS:
 648                 kvmppc_xics_free_icp(vcpu);
 649                 break;
 650         }
 651
 652         kvmppc_core_vcpu_free(vcpu);
 653 }
 654
 655 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 656 {
 657         kvm_arch_vcpu_free(vcpu);
 658 }
 659
 660 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 661 {
 662         return kvmppc_core_pending_dec(vcpu);
 663 }
 664
 665 /*
 666  * low level hrtimer wake routine. Because this runs in hardirq context
 667  * we schedule a tasklet to do the real work.
 668  */
 669 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 670 {
 671         struct kvm_vcpu *vcpu;
 672
 673         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 674         tasklet_schedule(&vcpu->arch.tasklet);
 675
 676         return HRTIMER_NORESTART;
 677 }
 678
 679 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 680 {
 681         int ret;
 682
 683         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 684         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 685         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 686         vcpu->arch.dec_expires = ~(u64)0;
 687
 688 #ifdef CONFIG_KVM_EXIT_TIMING
 689         mutex_init(&vcpu->arch.exit_timing_lock);
 690 #endif
 691         ret = kvmppc_subarch_vcpu_init(vcpu);
 692         return ret;
 693 }
 694
 695 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 696 {
 697         kvmppc_mmu_destroy(vcpu);
 698         kvmppc_subarch_vcpu_uninit(vcpu);
 699 }
 700
 701 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 702 {
 703 #ifdef CONFIG_BOOKE
 704         /*
 705          * vrsave (formerly usprg0) isn't used by Linux, but may
 706          * be used by the guest.
 707          *
 708          * On non-booke this is associated with Altivec and
 709          * is handled by code in book3s.c.
 710          */
 711         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 712 #endif
 713         kvmppc_core_vcpu_load(vcpu, cpu);
 714 }
 715
 716 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 717 {
 718         kvmppc_core_vcpu_put(vcpu);
 719 #ifdef CONFIG_BOOKE
 720         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 721 #endif
 722 }
 723
 724 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 725                                      struct kvm_run *run)
 726 {
 727         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 728 }
 729
 730 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 731                                       struct kvm_run *run)
 732 {
 733         u64 uninitialized_var(gpr);
 734
 735         if (run->mmio.len > sizeof(gpr)) {
 736                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 737                 return;
 738         }
 739
 740         if (vcpu->arch.mmio_is_bigendian) {
 741                 switch (run->mmio.len) {
 742                 case 8: gpr = *(u64 *)run->mmio.data; break;
 743                 case 4: gpr = *(u32 *)run->mmio.data; break;
 744                 case 2: gpr = *(u16 *)run->mmio.data; break;
 745                 case 1: gpr = *(u8 *)run->mmio.data; break;
 746                 }
 747         } else {
 748                 /* Convert BE data from userland back to LE. */
 749                 switch (run->mmio.len) {
 750                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 751                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 752                 case 1: gpr = *(u8 *)run->mmio.data; break;
 753                 }
 754         }
 755
 756         if (vcpu->arch.mmio_sign_extend) {
 757                 switch (run->mmio.len) {
 758 #ifdef CONFIG_PPC64
 759                 case 4:
 760                         gpr = (s64)(s32)gpr;
 761                         break;
 762 #endif
 763                 case 2:
 764                         gpr = (s64)(s16)gpr;
 765                         break;
 766                 case 1:
 767                         gpr = (s64)(s8)gpr;
 768                         break;
 769                 }
 770         }
 771
 772         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 773
 774         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
 775         case KVM_MMIO_REG_GPR:
 776                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 777                 break;
 778         case KVM_MMIO_REG_FPR:
 779                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 780                 break;
 781 #ifdef CONFIG_PPC_BOOK3S
 782         case KVM_MMIO_REG_QPR:
 783                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 784                 break;
 785         case KVM_MMIO_REG_FQPR:
 786                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 787                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 788                 break;
 789 #endif
 790         default:
 791                 BUG();
 792         }
 793 }
 794
 795 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 796                        unsigned int rt, unsigned int bytes,
 797                        int is_default_endian)
 798 {
 799         int idx, ret;
 800         int is_bigendian;
 801
 802         if (kvmppc_need_byteswap(vcpu)) {
 803                 /* Default endianness is "little endian". */
 804                 is_bigendian = !is_default_endian;
 805         } else {
 806                 /* Default endianness is "big endian". */
 807                 is_bigendian = is_default_endian;
 808         }
 809
 810         if (bytes > sizeof(run->mmio.data)) {
 811                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 812                        run->mmio.len);
 813         }
 814
 815         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 816         run->mmio.len = bytes;
 817         run->mmio.is_write = 0;
 818
 819         vcpu->arch.io_gpr = rt;
 820         vcpu->arch.mmio_is_bigendian = is_bigendian;
 821         vcpu->mmio_needed = 1;
 822         vcpu->mmio_is_write = 0;
 823         vcpu->arch.mmio_sign_extend = 0;
 824
 825         idx = srcu_read_lock(&vcpu->kvm->srcu);
 826
 827         ret = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
 828                               bytes, &run->mmio.data);
 829
 830         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 831
 832         if (!ret) {
 833                 kvmppc_complete_mmio_load(vcpu, run);
 834                 vcpu->mmio_needed = 0;
 835                 return EMULATE_DONE;
 836         }
 837
 838         return EMULATE_DO_MMIO;
 839 }
 840 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
 841
 842 /* Same as above, but sign extends */
 843 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 844                         unsigned int rt, unsigned int bytes,
 845                         int is_default_endian)
 846 {
 847         int r;
 848
 849         vcpu->arch.mmio_sign_extend = 1;
 850         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
 851
 852         return r;
 853 }
 854
 855 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 856                         u64 val, unsigned int bytes, int is_default_endian)
 857 {
 858         void *data = run->mmio.data;
 859         int idx, ret;
 860         int is_bigendian;
 861
 862         if (kvmppc_need_byteswap(vcpu)) {
 863                 /* Default endianness is "little endian". */
 864                 is_bigendian = !is_default_endian;
 865         } else {
 866                 /* Default endianness is "big endian". */
 867                 is_bigendian = is_default_endian;
 868         }
 869
 870         if (bytes > sizeof(run->mmio.data)) {
 871                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 872                        run->mmio.len);
 873         }
 874
 875         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 876         run->mmio.len = bytes;
 877         run->mmio.is_write = 1;
 878         vcpu->mmio_needed = 1;
 879         vcpu->mmio_is_write = 1;
 880
 881         /* Store the value at the lowest bytes in 'data'. */
 882         if (is_bigendian) {
 883                 switch (bytes) {
 884                 case 8: *(u64 *)data = val; break;
 885                 case 4: *(u32 *)data = val; break;
 886                 case 2: *(u16 *)data = val; break;
 887                 case 1: *(u8  *)data = val; break;
 888                 }
 889         } else {
 890                 /* Store LE value into 'data'. */
 891                 switch (bytes) {
 892                 case 4: st_le32(data, val); break;
 893                 case 2: st_le16(data, val); break;
 894                 case 1: *(u8 *)data = val; break;
 895                 }
 896         }
 897
 898         idx = srcu_read_lock(&vcpu->kvm->srcu);
 899
 900         ret = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
 901                                bytes, &run->mmio.data);
 902
 903         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 904
 905         if (!ret) {
 906                 vcpu->mmio_needed = 0;
 907                 return EMULATE_DONE;
 908         }
 909
 910         return EMULATE_DO_MMIO;
 911 }
 912 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
 913
 914 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 915 {
 916         int r;
 917         sigset_t sigsaved;
 918
 919         if (vcpu->sigset_active)
 920                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 921
 922         if (vcpu->mmio_needed) {
 923                 if (!vcpu->mmio_is_write)
 924                         kvmppc_complete_mmio_load(vcpu, run);
 925                 vcpu->mmio_needed = 0;
 926         } else if (vcpu->arch.dcr_needed) {
 927                 if (!vcpu->arch.dcr_is_write)
 928                         kvmppc_complete_dcr_load(vcpu, run);
 929                 vcpu->arch.dcr_needed = 0;
 930         } else if (vcpu->arch.osi_needed) {
 931                 u64 *gprs = run->osi.gprs;
 932                 int i;
 933
 934                 for (i = 0; i < 32; i++)
 935                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 936                 vcpu->arch.osi_needed = 0;
 937         } else if (vcpu->arch.hcall_needed) {
 938                 int i;
 939
 940                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 941                 for (i = 0; i < 9; ++i)
 942                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 943                 vcpu->arch.hcall_needed = 0;
 944 #ifdef CONFIG_BOOKE
 945         } else if (vcpu->arch.epr_needed) {
 946                 kvmppc_set_epr(vcpu, run->epr.epr);
 947                 vcpu->arch.epr_needed = 0;
 948 #endif
 949         }
 950
 951         r = kvmppc_vcpu_run(run, vcpu);
 952
 953         if (vcpu->sigset_active)
 954                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 955
 956         return r;
 957 }
 958
 959 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 960 {
 961         if (irq->irq == KVM_INTERRUPT_UNSET) {
 962                 kvmppc_core_dequeue_external(vcpu);
 963                 return 0;
 964         }
 965
 966         kvmppc_core_queue_external(vcpu, irq);
 967
 968         kvm_vcpu_kick(vcpu);
 969
 970         return 0;
 971 }
 972
 973 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 974                                      struct kvm_enable_cap *cap)
 975 {
 976         int r;
 977
 978         if (cap->flags)
 979                 return -EINVAL;
 980
 981         switch (cap->cap) {
 982         case KVM_CAP_PPC_OSI:
 983                 r = 0;
 984                 vcpu->arch.osi_enabled = true;
 985                 break;
 986         case KVM_CAP_PPC_PAPR:
 987                 r = 0;
 988                 vcpu->arch.papr_enabled = true;
 989                 break;
 990         case KVM_CAP_PPC_EPR:
 991                 r = 0;
 992                 if (cap->args[0])
 993                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
 994                 else
 995                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
 996                 break;
 997 #ifdef CONFIG_BOOKE
 998         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 999                 r = 0;
1000                 vcpu->arch.watchdog_enabled = true;
1001                 break;
1002 #endif
1003 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1004         case KVM_CAP_SW_TLB: {
1005                 struct kvm_config_tlb cfg;
1006                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1007
1008                 r = -EFAULT;
1009                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1010                         break;
1011
1012                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1013                 break;
1014         }
1015 #endif
1016 #ifdef CONFIG_KVM_MPIC
1017         case KVM_CAP_IRQ_MPIC: {
1018                 struct fd f;
1019                 struct kvm_device *dev;
1020
1021                 r = -EBADF;
1022                 f = fdget(cap->args[0]);
1023                 if (!f.file)
1024                         break;
1025
1026                 r = -EPERM;
1027                 dev = kvm_device_from_filp(f.file);
1028                 if (dev)
1029                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1030
1031                 fdput(f);
1032                 break;
1033         }
1034 #endif
1035 #ifdef CONFIG_KVM_XICS
1036         case KVM_CAP_IRQ_XICS: {
1037                 struct fd f;
1038                 struct kvm_device *dev;
1039
1040                 r = -EBADF;
1041                 f = fdget(cap->args[0]);
1042                 if (!f.file)
1043                         break;
1044
1045                 r = -EPERM;
1046                 dev = kvm_device_from_filp(f.file);
1047                 if (dev)
1048                         r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1049
1050                 fdput(f);
1051                 break;
1052         }
1053 #endif /* CONFIG_KVM_XICS */
1054         default:
1055                 r = -EINVAL;
1056                 break;
1057         }
1058
1059         if (!r)
1060                 r = kvmppc_sanity_check(vcpu);
1061
1062         return r;
1063 }
1064
1065 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1066                                     struct kvm_mp_state *mp_state)
1067 {
1068         return -EINVAL;
1069 }
1070
1071 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1072                                     struct kvm_mp_state *mp_state)
1073 {
1074         return -EINVAL;
1075 }
1076
1077 long kvm_arch_vcpu_ioctl(struct file *filp,
1078                          unsigned int ioctl, unsigned long arg)
1079 {
1080         struct kvm_vcpu *vcpu = filp->private_data;
1081         void __user *argp = (void __user *)arg;
1082         long r;
1083
1084         switch (ioctl) {
1085         case KVM_INTERRUPT: {
1086                 struct kvm_interrupt irq;
1087                 r = -EFAULT;
1088                 if (copy_from_user(&irq, argp, sizeof(irq)))
1089                         goto out;
1090                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1091                 goto out;
1092         }
1093
1094         case KVM_ENABLE_CAP:
1095         {
1096                 struct kvm_enable_cap cap;
1097                 r = -EFAULT;
1098                 if (copy_from_user(&cap, argp, sizeof(cap)))
1099                         goto out;
1100                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1101                 break;
1102         }
1103
1104         case KVM_SET_ONE_REG:
1105         case KVM_GET_ONE_REG:
1106         {
1107                 struct kvm_one_reg reg;
1108                 r = -EFAULT;
1109                 if (copy_from_user(&reg, argp, sizeof(reg)))
1110                         goto out;
1111                 if (ioctl == KVM_SET_ONE_REG)
1112                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1113                 else
1114                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1115                 break;
1116         }
1117
1118 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1119         case KVM_DIRTY_TLB: {
1120                 struct kvm_dirty_tlb dirty;
1121                 r = -EFAULT;
1122                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1123                         goto out;
1124                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1125                 break;
1126         }
1127 #endif
1128         default:
1129                 r = -EINVAL;
1130         }
1131
1132 out:
1133         return r;
1134 }
1135
1136 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1137 {
1138         return VM_FAULT_SIGBUS;
1139 }
1140
1141 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1142 {
1143         u32 inst_nop = 0x60000000;
1144 #ifdef CONFIG_KVM_BOOKE_HV
1145         u32 inst_sc1 = 0x44000022;
1146         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1147         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1148         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1149         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1150 #else
1151         u32 inst_lis = 0x3c000000;
1152         u32 inst_ori = 0x60000000;
1153         u32 inst_sc = 0x44000002;
1154         u32 inst_imm_mask = 0xffff;
1155
1156         /*
1157          * The hypercall to get into KVM from within guest context is as
1158          * follows:
1159          *
1160          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1161          *    ori r0, KVM_SC_MAGIC_R0@l
1162          *    sc
1163          *    nop
1164          */
1165         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1166         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1167         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1168         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1169 #endif
1170
1171         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1172
1173         return 0;
1174 }
1175
1176 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1177                           bool line_status)
1178 {
1179         if (!irqchip_in_kernel(kvm))
1180                 return -ENXIO;
1181
1182         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1183                                         irq_event->irq, irq_event->level,
1184                                         line_status);
1185         return 0;
1186 }
1187
1188
1189 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1190                                    struct kvm_enable_cap *cap)
1191 {
1192         int r;
1193
1194         if (cap->flags)
1195                 return -EINVAL;
1196
1197         switch (cap->cap) {
1198 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1199         case KVM_CAP_PPC_ENABLE_HCALL: {
1200                 unsigned long hcall = cap->args[0];
1201
1202                 r = -EINVAL;
1203                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1204                     cap->args[1] > 1)
1205                         break;
1206                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1207                         break;
1208                 if (cap->args[1])
1209                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1210                 else
1211                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1212                 r = 0;
1213                 break;
1214         }
1215 #endif
1216         default:
1217                 r = -EINVAL;
1218                 break;
1219         }
1220
1221         return r;
1222 }
1223
1224 long kvm_arch_vm_ioctl(struct file *filp,
1225                        unsigned int ioctl, unsigned long arg)
1226 {
1227         struct kvm *kvm __maybe_unused = filp->private_data;
1228         void __user *argp = (void __user *)arg;
1229         long r;
1230
1231         switch (ioctl) {
1232         case KVM_PPC_GET_PVINFO: {
1233                 struct kvm_ppc_pvinfo pvinfo;
1234                 memset(&pvinfo, 0, sizeof(pvinfo));
1235                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1236                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1237                         r = -EFAULT;
1238                         goto out;
1239                 }
1240
1241                 break;
1242         }
1243         case KVM_ENABLE_CAP:
1244         {
1245                 struct kvm_enable_cap cap;
1246                 r = -EFAULT;
1247                 if (copy_from_user(&cap, argp, sizeof(cap)))
1248                         goto out;
1249                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1250                 break;
1251         }
1252 #ifdef CONFIG_PPC_BOOK3S_64
1253         case KVM_CREATE_SPAPR_TCE: {
1254                 struct kvm_create_spapr_tce create_tce;
1255
1256                 r = -EFAULT;
1257                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1258                         goto out;
1259                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
1260                 goto out;
1261         }
1262         case KVM_PPC_GET_SMMU_INFO: {
1263                 struct kvm_ppc_smmu_info info;
1264                 struct kvm *kvm = filp->private_data;
1265
1266                 memset(&info, 0, sizeof(info));
1267                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1268                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1269                         r = -EFAULT;
1270                 break;
1271         }
1272         case KVM_PPC_RTAS_DEFINE_TOKEN: {
1273                 struct kvm *kvm = filp->private_data;
1274
1275                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1276                 break;
1277         }
1278         default: {
1279                 struct kvm *kvm = filp->private_data;
1280                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1281         }
1282 #else /* CONFIG_PPC_BOOK3S_64 */
1283         default:
1284                 r = -ENOTTY;
1285 #endif
1286         }
1287 out:
1288         return r;
1289 }
1290
1291 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1292 static unsigned long nr_lpids;
1293
1294 long kvmppc_alloc_lpid(void)
1295 {
1296         long lpid;
1297
1298         do {
1299                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1300                 if (lpid >= nr_lpids) {
1301                         pr_err("%s: No LPIDs free\n", __func__);
1302                         return -ENOMEM;
1303                 }
1304         } while (test_and_set_bit(lpid, lpid_inuse));
1305
1306         return lpid;
1307 }
1308 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1309
1310 void kvmppc_claim_lpid(long lpid)
1311 {
1312         set_bit(lpid, lpid_inuse);
1313 }
1314 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1315
1316 void kvmppc_free_lpid(long lpid)
1317 {
1318         clear_bit(lpid, lpid_inuse);
1319 }
1320 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1321
1322 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1323 {
1324         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1325         memset(lpid_inuse, 0, sizeof(lpid_inuse));
1326 }
1327 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1328
1329 int kvm_arch_init(void *opaque)
1330 {
1331         return 0;
1332 }
1333
1334 void kvm_arch_exit(void)
1335 {
1336
1337 }