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         /* Assume we're using HV mode when the HV module is loaded */
 398         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 399
 400         if (kvm) {
 401                 /*
 402                  * Hooray - we know which VM type we're running on. Depend on
 403                  * that rather than the guess above.
 404                  */
 405                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 406         }
 407
 408         switch (ext) {
 409 #ifdef CONFIG_BOOKE
 410         case KVM_CAP_PPC_BOOKE_SREGS:
 411         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 412         case KVM_CAP_PPC_EPR:
 413 #else
 414         case KVM_CAP_PPC_SEGSTATE:
 415         case KVM_CAP_PPC_HIOR:
 416         case KVM_CAP_PPC_PAPR:
 417 #endif
 418         case KVM_CAP_PPC_UNSET_IRQ:
 419         case KVM_CAP_PPC_IRQ_LEVEL:
 420         case KVM_CAP_ENABLE_CAP:
 421         case KVM_CAP_ENABLE_CAP_VM:
 422         case KVM_CAP_ONE_REG:
 423         case KVM_CAP_IOEVENTFD:
 424         case KVM_CAP_DEVICE_CTRL:
 425                 r = 1;
 426                 break;
 427         case KVM_CAP_PPC_PAIRED_SINGLES:
 428         case KVM_CAP_PPC_OSI:
 429         case KVM_CAP_PPC_GET_PVINFO:
 430 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 431         case KVM_CAP_SW_TLB:
 432 #endif
 433                 /* We support this only for PR */
 434                 r = !hv_enabled;
 435                 break;
 436 #ifdef CONFIG_KVM_MMIO
 437         case KVM_CAP_COALESCED_MMIO:
 438                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 439                 break;
 440 #endif
 441 #ifdef CONFIG_KVM_MPIC
 442         case KVM_CAP_IRQ_MPIC:
 443                 r = 1;
 444                 break;
 445 #endif
 446
 447 #ifdef CONFIG_PPC_BOOK3S_64
 448         case KVM_CAP_SPAPR_TCE:
 449         case KVM_CAP_PPC_ALLOC_HTAB:
 450         case KVM_CAP_PPC_RTAS:
 451         case KVM_CAP_PPC_FIXUP_HCALL:
 452         case KVM_CAP_PPC_ENABLE_HCALL:
 453 #ifdef CONFIG_KVM_XICS
 454         case KVM_CAP_IRQ_XICS:
 455 #endif
 456                 r = 1;
 457                 break;
 458 #endif /* CONFIG_PPC_BOOK3S_64 */
 459 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 460         case KVM_CAP_PPC_SMT:
 461                 if (hv_enabled)
 462                         r = threads_per_subcore;
 463                 else
 464                         r = 0;
 465                 break;
 466         case KVM_CAP_PPC_RMA:
 467                 r = hv_enabled;
 468                 /* PPC970 requires an RMA */
 469                 if (r && cpu_has_feature(CPU_FTR_ARCH_201))
 470                         r = 2;
 471                 break;
 472 #endif
 473         case KVM_CAP_SYNC_MMU:
 474 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 475                 if (hv_enabled)
 476                         r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
 477                 else
 478                         r = 0;
 479 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 480                 r = 1;
 481 #else
 482                 r = 0;
 483 #endif
 484                 break;
 485 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 486         case KVM_CAP_PPC_HTAB_FD:
 487                 r = hv_enabled;
 488                 break;
 489 #endif
 490         case KVM_CAP_NR_VCPUS:
 491                 /*
 492                  * Recommending a number of CPUs is somewhat arbitrary; we
 493                  * return the number of present CPUs for -HV (since a host
 494                  * will have secondary threads "offline"), and for other KVM
 495                  * implementations just count online CPUs.
 496                  */
 497                 if (hv_enabled)
 498                         r = num_present_cpus();
 499                 else
 500                         r = num_online_cpus();
 501                 break;
 502         case KVM_CAP_MAX_VCPUS:
 503                 r = KVM_MAX_VCPUS;
 504                 break;
 505 #ifdef CONFIG_PPC_BOOK3S_64
 506         case KVM_CAP_PPC_GET_SMMU_INFO:
 507                 r = 1;
 508                 break;
 509 #endif
 510         default:
 511                 r = 0;
 512                 break;
 513         }
 514         return r;
 515
 516 }
 517
 518 long kvm_arch_dev_ioctl(struct file *filp,
 519                         unsigned int ioctl, unsigned long arg)
 520 {
 521         return -EINVAL;
 522 }
 523
 524 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 525                            struct kvm_memory_slot *dont)
 526 {
 527         kvmppc_core_free_memslot(kvm, free, dont);
 528 }
 529
 530 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 531                             unsigned long npages)
 532 {
 533         return kvmppc_core_create_memslot(kvm, slot, npages);
 534 }
 535
 536 void kvm_arch_memslots_updated(struct kvm *kvm)
 537 {
 538 }
 539
 540 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 541                                    struct kvm_memory_slot *memslot,
 542                                    struct kvm_userspace_memory_region *mem,
 543                                    enum kvm_mr_change change)
 544 {
 545         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 546 }
 547
 548 void kvm_arch_commit_memory_region(struct kvm *kvm,
 549                                    struct kvm_userspace_memory_region *mem,
 550                                    const struct kvm_memory_slot *old,
 551                                    enum kvm_mr_change change)
 552 {
 553         kvmppc_core_commit_memory_region(kvm, mem, old);
 554 }
 555
 556 void kvm_arch_flush_shadow_all(struct kvm *kvm)
 557 {
 558 }
 559
 560 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 561                                    struct kvm_memory_slot *slot)
 562 {
 563         kvmppc_core_flush_memslot(kvm, slot);
 564 }
 565
 566 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 567 {
 568         struct kvm_vcpu *vcpu;
 569         vcpu = kvmppc_core_vcpu_create(kvm, id);
 570         if (!IS_ERR(vcpu)) {
 571                 vcpu->arch.wqp = &vcpu->wq;
 572                 kvmppc_create_vcpu_debugfs(vcpu, id);
 573         }
 574         return vcpu;
 575 }
 576
 577 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 578 {
 579         return 0;
 580 }
 581
 582 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 583 {
 584         /* Make sure we're not using the vcpu anymore */
 585         hrtimer_cancel(&vcpu->arch.dec_timer);
 586         tasklet_kill(&vcpu->arch.tasklet);
 587
 588         kvmppc_remove_vcpu_debugfs(vcpu);
 589
 590         switch (vcpu->arch.irq_type) {
 591         case KVMPPC_IRQ_MPIC:
 592                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 593                 break;
 594         case KVMPPC_IRQ_XICS:
 595                 kvmppc_xics_free_icp(vcpu);
 596                 break;
 597         }
 598
 599         kvmppc_core_vcpu_free(vcpu);
 600 }
 601
 602 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 603 {
 604         kvm_arch_vcpu_free(vcpu);
 605 }
 606
 607 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 608 {
 609         return kvmppc_core_pending_dec(vcpu);
 610 }
 611
 612 /*
 613  * low level hrtimer wake routine. Because this runs in hardirq context
 614  * we schedule a tasklet to do the real work.
 615  */
 616 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 617 {
 618         struct kvm_vcpu *vcpu;
 619
 620         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 621         tasklet_schedule(&vcpu->arch.tasklet);
 622
 623         return HRTIMER_NORESTART;
 624 }
 625
 626 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 627 {
 628         int ret;
 629
 630         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 631         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 632         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 633         vcpu->arch.dec_expires = ~(u64)0;
 634
 635 #ifdef CONFIG_KVM_EXIT_TIMING
 636         mutex_init(&vcpu->arch.exit_timing_lock);
 637 #endif
 638         ret = kvmppc_subarch_vcpu_init(vcpu);
 639         return ret;
 640 }
 641
 642 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 643 {
 644         kvmppc_mmu_destroy(vcpu);
 645         kvmppc_subarch_vcpu_uninit(vcpu);
 646 }
 647
 648 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 649 {
 650 #ifdef CONFIG_BOOKE
 651         /*
 652          * vrsave (formerly usprg0) isn't used by Linux, but may
 653          * be used by the guest.
 654          *
 655          * On non-booke this is associated with Altivec and
 656          * is handled by code in book3s.c.
 657          */
 658         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 659 #endif
 660         kvmppc_core_vcpu_load(vcpu, cpu);
 661 }
 662
 663 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 664 {
 665         kvmppc_core_vcpu_put(vcpu);
 666 #ifdef CONFIG_BOOKE
 667         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 668 #endif
 669 }
 670
 671 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 672                                      struct kvm_run *run)
 673 {
 674         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 675 }
 676
 677 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 678                                       struct kvm_run *run)
 679 {
 680         u64 uninitialized_var(gpr);
 681
 682         if (run->mmio.len > sizeof(gpr)) {
 683                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 684                 return;
 685         }
 686
 687         if (vcpu->arch.mmio_is_bigendian) {
 688                 switch (run->mmio.len) {
 689                 case 8: gpr = *(u64 *)run->mmio.data; break;
 690                 case 4: gpr = *(u32 *)run->mmio.data; break;
 691                 case 2: gpr = *(u16 *)run->mmio.data; break;
 692                 case 1: gpr = *(u8 *)run->mmio.data; break;
 693                 }
 694         } else {
 695                 /* Convert BE data from userland back to LE. */
 696                 switch (run->mmio.len) {
 697                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 698                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 699                 case 1: gpr = *(u8 *)run->mmio.data; break;
 700                 }
 701         }
 702
 703         if (vcpu->arch.mmio_sign_extend) {
 704                 switch (run->mmio.len) {
 705 #ifdef CONFIG_PPC64
 706                 case 4:
 707                         gpr = (s64)(s32)gpr;
 708                         break;
 709 #endif
 710                 case 2:
 711                         gpr = (s64)(s16)gpr;
 712                         break;
 713                 case 1:
 714                         gpr = (s64)(s8)gpr;
 715                         break;
 716                 }
 717         }
 718
 719         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 720
 721         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
 722         case KVM_MMIO_REG_GPR:
 723                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 724                 break;
 725         case KVM_MMIO_REG_FPR:
 726                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 727                 break;
 728 #ifdef CONFIG_PPC_BOOK3S
 729         case KVM_MMIO_REG_QPR:
 730                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 731                 break;
 732         case KVM_MMIO_REG_FQPR:
 733                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 734                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 735                 break;
 736 #endif
 737         default:
 738                 BUG();
 739         }
 740 }
 741
 742 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 743                        unsigned int rt, unsigned int bytes,
 744                        int is_default_endian)
 745 {
 746         int idx, ret;
 747         int is_bigendian;
 748
 749         if (kvmppc_need_byteswap(vcpu)) {
 750                 /* Default endianness is "little endian". */
 751                 is_bigendian = !is_default_endian;
 752         } else {
 753                 /* Default endianness is "big endian". */
 754                 is_bigendian = is_default_endian;
 755         }
 756
 757         if (bytes > sizeof(run->mmio.data)) {
 758                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 759                        run->mmio.len);
 760         }
 761
 762         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 763         run->mmio.len = bytes;
 764         run->mmio.is_write = 0;
 765
 766         vcpu->arch.io_gpr = rt;
 767         vcpu->arch.mmio_is_bigendian = is_bigendian;
 768         vcpu->mmio_needed = 1;
 769         vcpu->mmio_is_write = 0;
 770         vcpu->arch.mmio_sign_extend = 0;
 771
 772         idx = srcu_read_lock(&vcpu->kvm->srcu);
 773
 774         ret = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
 775                               bytes, &run->mmio.data);
 776
 777         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 778
 779         if (!ret) {
 780                 kvmppc_complete_mmio_load(vcpu, run);
 781                 vcpu->mmio_needed = 0;
 782                 return EMULATE_DONE;
 783         }
 784
 785         return EMULATE_DO_MMIO;
 786 }
 787 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
 788
 789 /* Same as above, but sign extends */
 790 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 791                         unsigned int rt, unsigned int bytes,
 792                         int is_default_endian)
 793 {
 794         int r;
 795
 796         vcpu->arch.mmio_sign_extend = 1;
 797         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
 798
 799         return r;
 800 }
 801
 802 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 803                         u64 val, unsigned int bytes, int is_default_endian)
 804 {
 805         void *data = run->mmio.data;
 806         int idx, ret;
 807         int is_bigendian;
 808
 809         if (kvmppc_need_byteswap(vcpu)) {
 810                 /* Default endianness is "little endian". */
 811                 is_bigendian = !is_default_endian;
 812         } else {
 813                 /* Default endianness is "big endian". */
 814                 is_bigendian = is_default_endian;
 815         }
 816
 817         if (bytes > sizeof(run->mmio.data)) {
 818                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 819                        run->mmio.len);
 820         }
 821
 822         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 823         run->mmio.len = bytes;
 824         run->mmio.is_write = 1;
 825         vcpu->mmio_needed = 1;
 826         vcpu->mmio_is_write = 1;
 827
 828         /* Store the value at the lowest bytes in 'data'. */
 829         if (is_bigendian) {
 830                 switch (bytes) {
 831                 case 8: *(u64 *)data = val; break;
 832                 case 4: *(u32 *)data = val; break;
 833                 case 2: *(u16 *)data = val; break;
 834                 case 1: *(u8  *)data = val; break;
 835                 }
 836         } else {
 837                 /* Store LE value into 'data'. */
 838                 switch (bytes) {
 839                 case 4: st_le32(data, val); break;
 840                 case 2: st_le16(data, val); break;
 841                 case 1: *(u8 *)data = val; break;
 842                 }
 843         }
 844
 845         idx = srcu_read_lock(&vcpu->kvm->srcu);
 846
 847         ret = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
 848                                bytes, &run->mmio.data);
 849
 850         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 851
 852         if (!ret) {
 853                 vcpu->mmio_needed = 0;
 854                 return EMULATE_DONE;
 855         }
 856
 857         return EMULATE_DO_MMIO;
 858 }
 859 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
 860
 861 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 862 {
 863         int r;
 864         sigset_t sigsaved;
 865
 866         if (vcpu->sigset_active)
 867                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 868
 869         if (vcpu->mmio_needed) {
 870                 if (!vcpu->mmio_is_write)
 871                         kvmppc_complete_mmio_load(vcpu, run);
 872                 vcpu->mmio_needed = 0;
 873         } else if (vcpu->arch.dcr_needed) {
 874                 if (!vcpu->arch.dcr_is_write)
 875                         kvmppc_complete_dcr_load(vcpu, run);
 876                 vcpu->arch.dcr_needed = 0;
 877         } else if (vcpu->arch.osi_needed) {
 878                 u64 *gprs = run->osi.gprs;
 879                 int i;
 880
 881                 for (i = 0; i < 32; i++)
 882                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 883                 vcpu->arch.osi_needed = 0;
 884         } else if (vcpu->arch.hcall_needed) {
 885                 int i;
 886
 887                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 888                 for (i = 0; i < 9; ++i)
 889                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 890                 vcpu->arch.hcall_needed = 0;
 891 #ifdef CONFIG_BOOKE
 892         } else if (vcpu->arch.epr_needed) {
 893                 kvmppc_set_epr(vcpu, run->epr.epr);
 894                 vcpu->arch.epr_needed = 0;
 895 #endif
 896         }
 897
 898         r = kvmppc_vcpu_run(run, vcpu);
 899
 900         if (vcpu->sigset_active)
 901                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 902
 903         return r;
 904 }
 905
 906 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 907 {
 908         if (irq->irq == KVM_INTERRUPT_UNSET) {
 909                 kvmppc_core_dequeue_external(vcpu);
 910                 return 0;
 911         }
 912
 913         kvmppc_core_queue_external(vcpu, irq);
 914
 915         kvm_vcpu_kick(vcpu);
 916
 917         return 0;
 918 }
 919
 920 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 921                                      struct kvm_enable_cap *cap)
 922 {
 923         int r;
 924
 925         if (cap->flags)
 926                 return -EINVAL;
 927
 928         switch (cap->cap) {
 929         case KVM_CAP_PPC_OSI:
 930                 r = 0;
 931                 vcpu->arch.osi_enabled = true;
 932                 break;
 933         case KVM_CAP_PPC_PAPR:
 934                 r = 0;
 935                 vcpu->arch.papr_enabled = true;
 936                 break;
 937         case KVM_CAP_PPC_EPR:
 938                 r = 0;
 939                 if (cap->args[0])
 940                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
 941                 else
 942                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
 943                 break;
 944 #ifdef CONFIG_BOOKE
 945         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 946                 r = 0;
 947                 vcpu->arch.watchdog_enabled = true;
 948                 break;
 949 #endif
 950 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 951         case KVM_CAP_SW_TLB: {
 952                 struct kvm_config_tlb cfg;
 953                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
 954
 955                 r = -EFAULT;
 956                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
 957                         break;
 958
 959                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
 960                 break;
 961         }
 962 #endif
 963 #ifdef CONFIG_KVM_MPIC
 964         case KVM_CAP_IRQ_MPIC: {
 965                 struct fd f;
 966                 struct kvm_device *dev;
 967
 968                 r = -EBADF;
 969                 f = fdget(cap->args[0]);
 970                 if (!f.file)
 971                         break;
 972
 973                 r = -EPERM;
 974                 dev = kvm_device_from_filp(f.file);
 975                 if (dev)
 976                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
 977
 978                 fdput(f);
 979                 break;
 980         }
 981 #endif
 982 #ifdef CONFIG_KVM_XICS
 983         case KVM_CAP_IRQ_XICS: {
 984                 struct fd f;
 985                 struct kvm_device *dev;
 986
 987                 r = -EBADF;
 988                 f = fdget(cap->args[0]);
 989                 if (!f.file)
 990                         break;
 991
 992                 r = -EPERM;
 993                 dev = kvm_device_from_filp(f.file);
 994                 if (dev)
 995                         r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
 996
 997                 fdput(f);
 998                 break;
 999         }
1000 #endif /* CONFIG_KVM_XICS */
1001         default:
1002                 r = -EINVAL;
1003                 break;
1004         }
1005
1006         if (!r)
1007                 r = kvmppc_sanity_check(vcpu);
1008
1009         return r;
1010 }
1011
1012 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1013                                     struct kvm_mp_state *mp_state)
1014 {
1015         return -EINVAL;
1016 }
1017
1018 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1019                                     struct kvm_mp_state *mp_state)
1020 {
1021         return -EINVAL;
1022 }
1023
1024 long kvm_arch_vcpu_ioctl(struct file *filp,
1025                          unsigned int ioctl, unsigned long arg)
1026 {
1027         struct kvm_vcpu *vcpu = filp->private_data;
1028         void __user *argp = (void __user *)arg;
1029         long r;
1030
1031         switch (ioctl) {
1032         case KVM_INTERRUPT: {
1033                 struct kvm_interrupt irq;
1034                 r = -EFAULT;
1035                 if (copy_from_user(&irq, argp, sizeof(irq)))
1036                         goto out;
1037                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1038                 goto out;
1039         }
1040
1041         case KVM_ENABLE_CAP:
1042         {
1043                 struct kvm_enable_cap cap;
1044                 r = -EFAULT;
1045                 if (copy_from_user(&cap, argp, sizeof(cap)))
1046                         goto out;
1047                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1048                 break;
1049         }
1050
1051         case KVM_SET_ONE_REG:
1052         case KVM_GET_ONE_REG:
1053         {
1054                 struct kvm_one_reg reg;
1055                 r = -EFAULT;
1056                 if (copy_from_user(&reg, argp, sizeof(reg)))
1057                         goto out;
1058                 if (ioctl == KVM_SET_ONE_REG)
1059                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1060                 else
1061                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1062                 break;
1063         }
1064
1065 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1066         case KVM_DIRTY_TLB: {
1067                 struct kvm_dirty_tlb dirty;
1068                 r = -EFAULT;
1069                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1070                         goto out;
1071                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1072                 break;
1073         }
1074 #endif
1075         default:
1076                 r = -EINVAL;
1077         }
1078
1079 out:
1080         return r;
1081 }
1082
1083 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1084 {
1085         return VM_FAULT_SIGBUS;
1086 }
1087
1088 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1089 {
1090         u32 inst_nop = 0x60000000;
1091 #ifdef CONFIG_KVM_BOOKE_HV
1092         u32 inst_sc1 = 0x44000022;
1093         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1094         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1095         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1096         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1097 #else
1098         u32 inst_lis = 0x3c000000;
1099         u32 inst_ori = 0x60000000;
1100         u32 inst_sc = 0x44000002;
1101         u32 inst_imm_mask = 0xffff;
1102
1103         /*
1104          * The hypercall to get into KVM from within guest context is as
1105          * follows:
1106          *
1107          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1108          *    ori r0, KVM_SC_MAGIC_R0@l
1109          *    sc
1110          *    nop
1111          */
1112         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1113         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1114         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1115         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1116 #endif
1117
1118         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1119
1120         return 0;
1121 }
1122
1123 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1124                           bool line_status)
1125 {
1126         if (!irqchip_in_kernel(kvm))
1127                 return -ENXIO;
1128
1129         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1130                                         irq_event->irq, irq_event->level,
1131                                         line_status);
1132         return 0;
1133 }
1134
1135
1136 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1137                                    struct kvm_enable_cap *cap)
1138 {
1139         int r;
1140
1141         if (cap->flags)
1142                 return -EINVAL;
1143
1144         switch (cap->cap) {
1145 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1146         case KVM_CAP_PPC_ENABLE_HCALL: {
1147                 unsigned long hcall = cap->args[0];
1148
1149                 r = -EINVAL;
1150                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1151                     cap->args[1] > 1)
1152                         break;
1153                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1154                         break;
1155                 if (cap->args[1])
1156                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1157                 else
1158                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1159                 r = 0;
1160                 break;
1161         }
1162 #endif
1163         default:
1164                 r = -EINVAL;
1165                 break;
1166         }
1167
1168         return r;
1169 }
1170
1171 long kvm_arch_vm_ioctl(struct file *filp,
1172                        unsigned int ioctl, unsigned long arg)
1173 {
1174         struct kvm *kvm __maybe_unused = filp->private_data;
1175         void __user *argp = (void __user *)arg;
1176         long r;
1177
1178         switch (ioctl) {
1179         case KVM_PPC_GET_PVINFO: {
1180                 struct kvm_ppc_pvinfo pvinfo;
1181                 memset(&pvinfo, 0, sizeof(pvinfo));
1182                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1183                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1184                         r = -EFAULT;
1185                         goto out;
1186                 }
1187
1188                 break;
1189         }
1190         case KVM_ENABLE_CAP:
1191         {
1192                 struct kvm_enable_cap cap;
1193                 r = -EFAULT;
1194                 if (copy_from_user(&cap, argp, sizeof(cap)))
1195                         goto out;
1196                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1197                 break;
1198         }
1199 #ifdef CONFIG_PPC_BOOK3S_64
1200         case KVM_CREATE_SPAPR_TCE: {
1201                 struct kvm_create_spapr_tce create_tce;
1202
1203                 r = -EFAULT;
1204                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1205                         goto out;
1206                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
1207                 goto out;
1208         }
1209         case KVM_PPC_GET_SMMU_INFO: {
1210                 struct kvm_ppc_smmu_info info;
1211                 struct kvm *kvm = filp->private_data;
1212
1213                 memset(&info, 0, sizeof(info));
1214                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1215                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1216                         r = -EFAULT;
1217                 break;
1218         }
1219         case KVM_PPC_RTAS_DEFINE_TOKEN: {
1220                 struct kvm *kvm = filp->private_data;
1221
1222                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1223                 break;
1224         }
1225         default: {
1226                 struct kvm *kvm = filp->private_data;
1227                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1228         }
1229 #else /* CONFIG_PPC_BOOK3S_64 */
1230         default:
1231                 r = -ENOTTY;
1232 #endif
1233         }
1234 out:
1235         return r;
1236 }
1237
1238 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1239 static unsigned long nr_lpids;
1240
1241 long kvmppc_alloc_lpid(void)
1242 {
1243         long lpid;
1244
1245         do {
1246                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1247                 if (lpid >= nr_lpids) {
1248                         pr_err("%s: No LPIDs free\n", __func__);
1249                         return -ENOMEM;
1250                 }
1251         } while (test_and_set_bit(lpid, lpid_inuse));
1252
1253         return lpid;
1254 }
1255 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1256
1257 void kvmppc_claim_lpid(long lpid)
1258 {
1259         set_bit(lpid, lpid_inuse);
1260 }
1261 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1262
1263 void kvmppc_free_lpid(long lpid)
1264 {
1265         clear_bit(lpid, lpid_inuse);
1266 }
1267 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1268
1269 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1270 {
1271         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1272         memset(lpid_inuse, 0, sizeof(lpid_inuse));
1273 }
1274 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1275
1276 int kvm_arch_init(void *opaque)
1277 {
1278         return 0;
1279 }
1280
1281 void kvm_arch_exit(void)
1282 {
1283
1284 }