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 kvm_arch_hardware_enable(void *garbage)
 313 {
 314         return 0;
 315 }
 316
 317 void kvm_arch_hardware_disable(void *garbage)
 318 {
 319 }
 320
 321 int kvm_arch_hardware_setup(void)
 322 {
 323         return 0;
 324 }
 325
 326 void kvm_arch_hardware_unsetup(void)
 327 {
 328 }
 329
 330 void kvm_arch_check_processor_compat(void *rtn)
 331 {
 332         *(int *)rtn = kvmppc_core_check_processor_compat();
 333 }
 334
 335 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 336 {
 337         struct kvmppc_ops *kvm_ops = NULL;
 338         /*
 339          * if we have both HV and PR enabled, default is HV
 340          */
 341         if (type == 0) {
 342                 if (kvmppc_hv_ops)
 343                         kvm_ops = kvmppc_hv_ops;
 344                 else
 345                         kvm_ops = kvmppc_pr_ops;
 346                 if (!kvm_ops)
 347                         goto err_out;
 348         } else  if (type == KVM_VM_PPC_HV) {
 349                 if (!kvmppc_hv_ops)
 350                         goto err_out;
 351                 kvm_ops = kvmppc_hv_ops;
 352         } else if (type == KVM_VM_PPC_PR) {
 353                 if (!kvmppc_pr_ops)
 354                         goto err_out;
 355                 kvm_ops = kvmppc_pr_ops;
 356         } else
 357                 goto err_out;
 358
 359         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
 360                 return -ENOENT;
 361
 362         kvm->arch.kvm_ops = kvm_ops;
 363         return kvmppc_core_init_vm(kvm);
 364 err_out:
 365         return -EINVAL;
 366 }
 367
 368 void kvm_arch_destroy_vm(struct kvm *kvm)
 369 {
 370         unsigned int i;
 371         struct kvm_vcpu *vcpu;
 372
 373         kvm_for_each_vcpu(i, vcpu, kvm)
 374                 kvm_arch_vcpu_free(vcpu);
 375
 376         mutex_lock(&kvm->lock);
 377         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 378                 kvm->vcpus[i] = NULL;
 379
 380         atomic_set(&kvm->online_vcpus, 0);
 381
 382         kvmppc_core_destroy_vm(kvm);
 383
 384         mutex_unlock(&kvm->lock);
 385
 386         /* drop the module reference */
 387         module_put(kvm->arch.kvm_ops->owner);
 388 }
 389
 390 void kvm_arch_sync_events(struct kvm *kvm)
 391 {
 392 }
 393
 394 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 395 {
 396         int r;
 397         /* FIXME!!
 398          * Should some of this be vm ioctl ? is it possible now ?
 399          */
 400         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 401
 402         switch (ext) {
 403 #ifdef CONFIG_BOOKE
 404         case KVM_CAP_PPC_BOOKE_SREGS:
 405         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 406         case KVM_CAP_PPC_EPR:
 407 #else
 408         case KVM_CAP_PPC_SEGSTATE:
 409         case KVM_CAP_PPC_HIOR:
 410         case KVM_CAP_PPC_PAPR:
 411 #endif
 412         case KVM_CAP_PPC_UNSET_IRQ:
 413         case KVM_CAP_PPC_IRQ_LEVEL:
 414         case KVM_CAP_ENABLE_CAP:
 415         case KVM_CAP_ENABLE_CAP_VM:
 416         case KVM_CAP_ONE_REG:
 417         case KVM_CAP_IOEVENTFD:
 418         case KVM_CAP_DEVICE_CTRL:
 419                 r = 1;
 420                 break;
 421         case KVM_CAP_PPC_PAIRED_SINGLES:
 422         case KVM_CAP_PPC_OSI:
 423         case KVM_CAP_PPC_GET_PVINFO:
 424 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 425         case KVM_CAP_SW_TLB:
 426 #endif
 427                 /* We support this only for PR */
 428                 r = !hv_enabled;
 429                 break;
 430 #ifdef CONFIG_KVM_MMIO
 431         case KVM_CAP_COALESCED_MMIO:
 432                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 433                 break;
 434 #endif
 435 #ifdef CONFIG_KVM_MPIC
 436         case KVM_CAP_IRQ_MPIC:
 437                 r = 1;
 438                 break;
 439 #endif
 440
 441 #ifdef CONFIG_PPC_BOOK3S_64
 442         case KVM_CAP_SPAPR_TCE:
 443         case KVM_CAP_PPC_ALLOC_HTAB:
 444         case KVM_CAP_PPC_RTAS:
 445         case KVM_CAP_PPC_FIXUP_HCALL:
 446         case KVM_CAP_PPC_ENABLE_HCALL:
 447 #ifdef CONFIG_KVM_XICS
 448         case KVM_CAP_IRQ_XICS:
 449 #endif
 450                 r = 1;
 451                 break;
 452 #endif /* CONFIG_PPC_BOOK3S_64 */
 453 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 454         case KVM_CAP_PPC_SMT:
 455                 if (hv_enabled)
 456                         r = threads_per_subcore;
 457                 else
 458                         r = 0;
 459                 break;
 460         case KVM_CAP_PPC_RMA:
 461                 r = hv_enabled;
 462                 /* PPC970 requires an RMA */
 463                 if (r && cpu_has_feature(CPU_FTR_ARCH_201))
 464                         r = 2;
 465                 break;
 466 #endif
 467         case KVM_CAP_SYNC_MMU:
 468 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 469                 if (hv_enabled)
 470                         r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
 471                 else
 472                         r = 0;
 473 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 474                 r = 1;
 475 #else
 476                 r = 0;
 477 #endif
 478                 break;
 479 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 480         case KVM_CAP_PPC_HTAB_FD:
 481                 r = hv_enabled;
 482                 break;
 483 #endif
 484         case KVM_CAP_NR_VCPUS:
 485                 /*
 486                  * Recommending a number of CPUs is somewhat arbitrary; we
 487                  * return the number of present CPUs for -HV (since a host
 488                  * will have secondary threads "offline"), and for other KVM
 489                  * implementations just count online CPUs.
 490                  */
 491                 if (hv_enabled)
 492                         r = num_present_cpus();
 493                 else
 494                         r = num_online_cpus();
 495                 break;
 496         case KVM_CAP_MAX_VCPUS:
 497                 r = KVM_MAX_VCPUS;
 498                 break;
 499 #ifdef CONFIG_PPC_BOOK3S_64
 500         case KVM_CAP_PPC_GET_SMMU_INFO:
 501                 r = 1;
 502                 break;
 503 #endif
 504         default:
 505                 r = 0;
 506                 break;
 507         }
 508         return r;
 509
 510 }
 511
 512 long kvm_arch_dev_ioctl(struct file *filp,
 513                         unsigned int ioctl, unsigned long arg)
 514 {
 515         return -EINVAL;
 516 }
 517
 518 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 519                            struct kvm_memory_slot *dont)
 520 {
 521         kvmppc_core_free_memslot(kvm, free, dont);
 522 }
 523
 524 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 525                             unsigned long npages)
 526 {
 527         return kvmppc_core_create_memslot(kvm, slot, npages);
 528 }
 529
 530 void kvm_arch_memslots_updated(struct kvm *kvm)
 531 {
 532 }
 533
 534 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 535                                    struct kvm_memory_slot *memslot,
 536                                    struct kvm_userspace_memory_region *mem,
 537                                    enum kvm_mr_change change)
 538 {
 539         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 540 }
 541
 542 void kvm_arch_commit_memory_region(struct kvm *kvm,
 543                                    struct kvm_userspace_memory_region *mem,
 544                                    const struct kvm_memory_slot *old,
 545                                    enum kvm_mr_change change)
 546 {
 547         kvmppc_core_commit_memory_region(kvm, mem, old);
 548 }
 549
 550 void kvm_arch_flush_shadow_all(struct kvm *kvm)
 551 {
 552 }
 553
 554 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 555                                    struct kvm_memory_slot *slot)
 556 {
 557         kvmppc_core_flush_memslot(kvm, slot);
 558 }
 559
 560 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 561 {
 562         struct kvm_vcpu *vcpu;
 563         vcpu = kvmppc_core_vcpu_create(kvm, id);
 564         if (!IS_ERR(vcpu)) {
 565                 vcpu->arch.wqp = &vcpu->wq;
 566                 kvmppc_create_vcpu_debugfs(vcpu, id);
 567         }
 568         return vcpu;
 569 }
 570
 571 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 572 {
 573         return 0;
 574 }
 575
 576 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 577 {
 578         /* Make sure we're not using the vcpu anymore */
 579         hrtimer_cancel(&vcpu->arch.dec_timer);
 580         tasklet_kill(&vcpu->arch.tasklet);
 581
 582         kvmppc_remove_vcpu_debugfs(vcpu);
 583
 584         switch (vcpu->arch.irq_type) {
 585         case KVMPPC_IRQ_MPIC:
 586                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 587                 break;
 588         case KVMPPC_IRQ_XICS:
 589                 kvmppc_xics_free_icp(vcpu);
 590                 break;
 591         }
 592
 593         kvmppc_core_vcpu_free(vcpu);
 594 }
 595
 596 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 597 {
 598         kvm_arch_vcpu_free(vcpu);
 599 }
 600
 601 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 602 {
 603         return kvmppc_core_pending_dec(vcpu);
 604 }
 605
 606 /*
 607  * low level hrtimer wake routine. Because this runs in hardirq context
 608  * we schedule a tasklet to do the real work.
 609  */
 610 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 611 {
 612         struct kvm_vcpu *vcpu;
 613
 614         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 615         tasklet_schedule(&vcpu->arch.tasklet);
 616
 617         return HRTIMER_NORESTART;
 618 }
 619
 620 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 621 {
 622         int ret;
 623
 624         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 625         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 626         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 627         vcpu->arch.dec_expires = ~(u64)0;
 628
 629 #ifdef CONFIG_KVM_EXIT_TIMING
 630         mutex_init(&vcpu->arch.exit_timing_lock);
 631 #endif
 632         ret = kvmppc_subarch_vcpu_init(vcpu);
 633         return ret;
 634 }
 635
 636 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 637 {
 638         kvmppc_mmu_destroy(vcpu);
 639         kvmppc_subarch_vcpu_uninit(vcpu);
 640 }
 641
 642 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 643 {
 644 #ifdef CONFIG_BOOKE
 645         /*
 646          * vrsave (formerly usprg0) isn't used by Linux, but may
 647          * be used by the guest.
 648          *
 649          * On non-booke this is associated with Altivec and
 650          * is handled by code in book3s.c.
 651          */
 652         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 653 #endif
 654         kvmppc_core_vcpu_load(vcpu, cpu);
 655 }
 656
 657 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 658 {
 659         kvmppc_core_vcpu_put(vcpu);
 660 #ifdef CONFIG_BOOKE
 661         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 662 #endif
 663 }
 664
 665 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 666                                      struct kvm_run *run)
 667 {
 668         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 669 }
 670
 671 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 672                                       struct kvm_run *run)
 673 {
 674         u64 uninitialized_var(gpr);
 675
 676         if (run->mmio.len > sizeof(gpr)) {
 677                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 678                 return;
 679         }
 680
 681         if (vcpu->arch.mmio_is_bigendian) {
 682                 switch (run->mmio.len) {
 683                 case 8: gpr = *(u64 *)run->mmio.data; break;
 684                 case 4: gpr = *(u32 *)run->mmio.data; break;
 685                 case 2: gpr = *(u16 *)run->mmio.data; break;
 686                 case 1: gpr = *(u8 *)run->mmio.data; break;
 687                 }
 688         } else {
 689                 /* Convert BE data from userland back to LE. */
 690                 switch (run->mmio.len) {
 691                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 692                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 693                 case 1: gpr = *(u8 *)run->mmio.data; break;
 694                 }
 695         }
 696
 697         if (vcpu->arch.mmio_sign_extend) {
 698                 switch (run->mmio.len) {
 699 #ifdef CONFIG_PPC64
 700                 case 4:
 701                         gpr = (s64)(s32)gpr;
 702                         break;
 703 #endif
 704                 case 2:
 705                         gpr = (s64)(s16)gpr;
 706                         break;
 707                 case 1:
 708                         gpr = (s64)(s8)gpr;
 709                         break;
 710                 }
 711         }
 712
 713         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 714
 715         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
 716         case KVM_MMIO_REG_GPR:
 717                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 718                 break;
 719         case KVM_MMIO_REG_FPR:
 720                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 721                 break;
 722 #ifdef CONFIG_PPC_BOOK3S
 723         case KVM_MMIO_REG_QPR:
 724                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 725                 break;
 726         case KVM_MMIO_REG_FQPR:
 727                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 728                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 729                 break;
 730 #endif
 731         default:
 732                 BUG();
 733         }
 734 }
 735
 736 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 737                        unsigned int rt, unsigned int bytes,
 738                        int is_default_endian)
 739 {
 740         int idx, ret;
 741         int is_bigendian;
 742
 743         if (kvmppc_need_byteswap(vcpu)) {
 744                 /* Default endianness is "little endian". */
 745                 is_bigendian = !is_default_endian;
 746         } else {
 747                 /* Default endianness is "big endian". */
 748                 is_bigendian = is_default_endian;
 749         }
 750
 751         if (bytes > sizeof(run->mmio.data)) {
 752                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 753                        run->mmio.len);
 754         }
 755
 756         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 757         run->mmio.len = bytes;
 758         run->mmio.is_write = 0;
 759
 760         vcpu->arch.io_gpr = rt;
 761         vcpu->arch.mmio_is_bigendian = is_bigendian;
 762         vcpu->mmio_needed = 1;
 763         vcpu->mmio_is_write = 0;
 764         vcpu->arch.mmio_sign_extend = 0;
 765
 766         idx = srcu_read_lock(&vcpu->kvm->srcu);
 767
 768         ret = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
 769                               bytes, &run->mmio.data);
 770
 771         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 772
 773         if (!ret) {
 774                 kvmppc_complete_mmio_load(vcpu, run);
 775                 vcpu->mmio_needed = 0;
 776                 return EMULATE_DONE;
 777         }
 778
 779         return EMULATE_DO_MMIO;
 780 }
 781 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
 782
 783 /* Same as above, but sign extends */
 784 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 785                         unsigned int rt, unsigned int bytes,
 786                         int is_default_endian)
 787 {
 788         int r;
 789
 790         vcpu->arch.mmio_sign_extend = 1;
 791         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
 792
 793         return r;
 794 }
 795
 796 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 797                         u64 val, unsigned int bytes, int is_default_endian)
 798 {
 799         void *data = run->mmio.data;
 800         int idx, ret;
 801         int is_bigendian;
 802
 803         if (kvmppc_need_byteswap(vcpu)) {
 804                 /* Default endianness is "little endian". */
 805                 is_bigendian = !is_default_endian;
 806         } else {
 807                 /* Default endianness is "big endian". */
 808                 is_bigendian = is_default_endian;
 809         }
 810
 811         if (bytes > sizeof(run->mmio.data)) {
 812                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 813                        run->mmio.len);
 814         }
 815
 816         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 817         run->mmio.len = bytes;
 818         run->mmio.is_write = 1;
 819         vcpu->mmio_needed = 1;
 820         vcpu->mmio_is_write = 1;
 821
 822         /* Store the value at the lowest bytes in 'data'. */
 823         if (is_bigendian) {
 824                 switch (bytes) {
 825                 case 8: *(u64 *)data = val; break;
 826                 case 4: *(u32 *)data = val; break;
 827                 case 2: *(u16 *)data = val; break;
 828                 case 1: *(u8  *)data = val; break;
 829                 }
 830         } else {
 831                 /* Store LE value into 'data'. */
 832                 switch (bytes) {
 833                 case 4: st_le32(data, val); break;
 834                 case 2: st_le16(data, val); break;
 835                 case 1: *(u8 *)data = val; break;
 836                 }
 837         }
 838
 839         idx = srcu_read_lock(&vcpu->kvm->srcu);
 840
 841         ret = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
 842                                bytes, &run->mmio.data);
 843
 844         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 845
 846         if (!ret) {
 847                 vcpu->mmio_needed = 0;
 848                 return EMULATE_DONE;
 849         }
 850
 851         return EMULATE_DO_MMIO;
 852 }
 853 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
 854
 855 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 856 {
 857         int r;
 858         sigset_t sigsaved;
 859
 860         if (vcpu->sigset_active)
 861                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 862
 863         if (vcpu->mmio_needed) {
 864                 if (!vcpu->mmio_is_write)
 865                         kvmppc_complete_mmio_load(vcpu, run);
 866                 vcpu->mmio_needed = 0;
 867         } else if (vcpu->arch.dcr_needed) {
 868                 if (!vcpu->arch.dcr_is_write)
 869                         kvmppc_complete_dcr_load(vcpu, run);
 870                 vcpu->arch.dcr_needed = 0;
 871         } else if (vcpu->arch.osi_needed) {
 872                 u64 *gprs = run->osi.gprs;
 873                 int i;
 874
 875                 for (i = 0; i < 32; i++)
 876                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 877                 vcpu->arch.osi_needed = 0;
 878         } else if (vcpu->arch.hcall_needed) {
 879                 int i;
 880
 881                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 882                 for (i = 0; i < 9; ++i)
 883                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 884                 vcpu->arch.hcall_needed = 0;
 885 #ifdef CONFIG_BOOKE
 886         } else if (vcpu->arch.epr_needed) {
 887                 kvmppc_set_epr(vcpu, run->epr.epr);
 888                 vcpu->arch.epr_needed = 0;
 889 #endif
 890         }
 891
 892         r = kvmppc_vcpu_run(run, vcpu);
 893
 894         if (vcpu->sigset_active)
 895                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 896
 897         return r;
 898 }
 899
 900 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 901 {
 902         if (irq->irq == KVM_INTERRUPT_UNSET) {
 903                 kvmppc_core_dequeue_external(vcpu);
 904                 return 0;
 905         }
 906
 907         kvmppc_core_queue_external(vcpu, irq);
 908
 909         kvm_vcpu_kick(vcpu);
 910
 911         return 0;
 912 }
 913
 914 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 915                                      struct kvm_enable_cap *cap)
 916 {
 917         int r;
 918
 919         if (cap->flags)
 920                 return -EINVAL;
 921
 922         switch (cap->cap) {
 923         case KVM_CAP_PPC_OSI:
 924                 r = 0;
 925                 vcpu->arch.osi_enabled = true;
 926                 break;
 927         case KVM_CAP_PPC_PAPR:
 928                 r = 0;
 929                 vcpu->arch.papr_enabled = true;
 930                 break;
 931         case KVM_CAP_PPC_EPR:
 932                 r = 0;
 933                 if (cap->args[0])
 934                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
 935                 else
 936                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
 937                 break;
 938 #ifdef CONFIG_BOOKE
 939         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 940                 r = 0;
 941                 vcpu->arch.watchdog_enabled = true;
 942                 break;
 943 #endif
 944 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 945         case KVM_CAP_SW_TLB: {
 946                 struct kvm_config_tlb cfg;
 947                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
 948
 949                 r = -EFAULT;
 950                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
 951                         break;
 952
 953                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
 954                 break;
 955         }
 956 #endif
 957 #ifdef CONFIG_KVM_MPIC
 958         case KVM_CAP_IRQ_MPIC: {
 959                 struct fd f;
 960                 struct kvm_device *dev;
 961
 962                 r = -EBADF;
 963                 f = fdget(cap->args[0]);
 964                 if (!f.file)
 965                         break;
 966
 967                 r = -EPERM;
 968                 dev = kvm_device_from_filp(f.file);
 969                 if (dev)
 970                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
 971
 972                 fdput(f);
 973                 break;
 974         }
 975 #endif
 976 #ifdef CONFIG_KVM_XICS
 977         case KVM_CAP_IRQ_XICS: {
 978                 struct fd f;
 979                 struct kvm_device *dev;
 980
 981                 r = -EBADF;
 982                 f = fdget(cap->args[0]);
 983                 if (!f.file)
 984                         break;
 985
 986                 r = -EPERM;
 987                 dev = kvm_device_from_filp(f.file);
 988                 if (dev)
 989                         r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
 990
 991                 fdput(f);
 992                 break;
 993         }
 994 #endif /* CONFIG_KVM_XICS */
 995         default:
 996                 r = -EINVAL;
 997                 break;
 998         }
 999
1000         if (!r)
1001                 r = kvmppc_sanity_check(vcpu);
1002
1003         return r;
1004 }
1005
1006 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1007                                     struct kvm_mp_state *mp_state)
1008 {
1009         return -EINVAL;
1010 }
1011
1012 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1013                                     struct kvm_mp_state *mp_state)
1014 {
1015         return -EINVAL;
1016 }
1017
1018 long kvm_arch_vcpu_ioctl(struct file *filp,
1019                          unsigned int ioctl, unsigned long arg)
1020 {
1021         struct kvm_vcpu *vcpu = filp->private_data;
1022         void __user *argp = (void __user *)arg;
1023         long r;
1024
1025         switch (ioctl) {
1026         case KVM_INTERRUPT: {
1027                 struct kvm_interrupt irq;
1028                 r = -EFAULT;
1029                 if (copy_from_user(&irq, argp, sizeof(irq)))
1030                         goto out;
1031                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1032                 goto out;
1033         }
1034
1035         case KVM_ENABLE_CAP:
1036         {
1037                 struct kvm_enable_cap cap;
1038                 r = -EFAULT;
1039                 if (copy_from_user(&cap, argp, sizeof(cap)))
1040                         goto out;
1041                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1042                 break;
1043         }
1044
1045         case KVM_SET_ONE_REG:
1046         case KVM_GET_ONE_REG:
1047         {
1048                 struct kvm_one_reg reg;
1049                 r = -EFAULT;
1050                 if (copy_from_user(&reg, argp, sizeof(reg)))
1051                         goto out;
1052                 if (ioctl == KVM_SET_ONE_REG)
1053                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1054                 else
1055                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1056                 break;
1057         }
1058
1059 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1060         case KVM_DIRTY_TLB: {
1061                 struct kvm_dirty_tlb dirty;
1062                 r = -EFAULT;
1063                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1064                         goto out;
1065                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1066                 break;
1067         }
1068 #endif
1069         default:
1070                 r = -EINVAL;
1071         }
1072
1073 out:
1074         return r;
1075 }
1076
1077 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1078 {
1079         return VM_FAULT_SIGBUS;
1080 }
1081
1082 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1083 {
1084         u32 inst_nop = 0x60000000;
1085 #ifdef CONFIG_KVM_BOOKE_HV
1086         u32 inst_sc1 = 0x44000022;
1087         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1088         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1089         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1090         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1091 #else
1092         u32 inst_lis = 0x3c000000;
1093         u32 inst_ori = 0x60000000;
1094         u32 inst_sc = 0x44000002;
1095         u32 inst_imm_mask = 0xffff;
1096
1097         /*
1098          * The hypercall to get into KVM from within guest context is as
1099          * follows:
1100          *
1101          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1102          *    ori r0, KVM_SC_MAGIC_R0@l
1103          *    sc
1104          *    nop
1105          */
1106         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1107         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1108         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1109         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1110 #endif
1111
1112         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1113
1114         return 0;
1115 }
1116
1117 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1118                           bool line_status)
1119 {
1120         if (!irqchip_in_kernel(kvm))
1121                 return -ENXIO;
1122
1123         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1124                                         irq_event->irq, irq_event->level,
1125                                         line_status);
1126         return 0;
1127 }
1128
1129
1130 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1131                                    struct kvm_enable_cap *cap)
1132 {
1133         int r;
1134
1135         if (cap->flags)
1136                 return -EINVAL;
1137
1138         switch (cap->cap) {
1139 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1140         case KVM_CAP_PPC_ENABLE_HCALL: {
1141                 unsigned long hcall = cap->args[0];
1142
1143                 r = -EINVAL;
1144                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1145                     cap->args[1] > 1)
1146                         break;
1147                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1148                         break;
1149                 if (cap->args[1])
1150                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1151                 else
1152                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1153                 r = 0;
1154                 break;
1155         }
1156 #endif
1157         default:
1158                 r = -EINVAL;
1159                 break;
1160         }
1161
1162         return r;
1163 }
1164
1165 long kvm_arch_vm_ioctl(struct file *filp,
1166                        unsigned int ioctl, unsigned long arg)
1167 {
1168         struct kvm *kvm __maybe_unused = filp->private_data;
1169         void __user *argp = (void __user *)arg;
1170         long r;
1171
1172         switch (ioctl) {
1173         case KVM_PPC_GET_PVINFO: {
1174                 struct kvm_ppc_pvinfo pvinfo;
1175                 memset(&pvinfo, 0, sizeof(pvinfo));
1176                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1177                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1178                         r = -EFAULT;
1179                         goto out;
1180                 }
1181
1182                 break;
1183         }
1184         case KVM_ENABLE_CAP:
1185         {
1186                 struct kvm_enable_cap cap;
1187                 r = -EFAULT;
1188                 if (copy_from_user(&cap, argp, sizeof(cap)))
1189                         goto out;
1190                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1191                 break;
1192         }
1193 #ifdef CONFIG_PPC_BOOK3S_64
1194         case KVM_CREATE_SPAPR_TCE: {
1195                 struct kvm_create_spapr_tce create_tce;
1196
1197                 r = -EFAULT;
1198                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1199                         goto out;
1200                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
1201                 goto out;
1202         }
1203         case KVM_PPC_GET_SMMU_INFO: {
1204                 struct kvm_ppc_smmu_info info;
1205                 struct kvm *kvm = filp->private_data;
1206
1207                 memset(&info, 0, sizeof(info));
1208                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1209                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1210                         r = -EFAULT;
1211                 break;
1212         }
1213         case KVM_PPC_RTAS_DEFINE_TOKEN: {
1214                 struct kvm *kvm = filp->private_data;
1215
1216                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1217                 break;
1218         }
1219         default: {
1220                 struct kvm *kvm = filp->private_data;
1221                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1222         }
1223 #else /* CONFIG_PPC_BOOK3S_64 */
1224         default:
1225                 r = -ENOTTY;
1226 #endif
1227         }
1228 out:
1229         return r;
1230 }
1231
1232 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1233 static unsigned long nr_lpids;
1234
1235 long kvmppc_alloc_lpid(void)
1236 {
1237         long lpid;
1238
1239         do {
1240                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1241                 if (lpid >= nr_lpids) {
1242                         pr_err("%s: No LPIDs free\n", __func__);
1243                         return -ENOMEM;
1244                 }
1245         } while (test_and_set_bit(lpid, lpid_inuse));
1246
1247         return lpid;
1248 }
1249 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1250
1251 void kvmppc_claim_lpid(long lpid)
1252 {
1253         set_bit(lpid, lpid_inuse);
1254 }
1255 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1256
1257 void kvmppc_free_lpid(long lpid)
1258 {
1259         clear_bit(lpid, lpid_inuse);
1260 }
1261 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1262
1263 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1264 {
1265         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1266         memset(lpid_inuse, 0, sizeof(lpid_inuse));
1267 }
1268 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1269
1270 int kvm_arch_init(void *opaque)
1271 {
1272         return 0;
1273 }
1274
1275 void kvm_arch_exit(void)
1276 {
1277
1278 }