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_loadstore(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         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 316         struct kvmppc_pte pte;
 317         int r;
 318
 319         vcpu->stat.st++;
 320
 321         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 322                          XLATE_WRITE, &pte);
 323         if (r < 0)
 324                 return r;
 325
 326         *eaddr = pte.raddr;
 327
 328         if (!pte.may_write)
 329                 return -EPERM;
 330
 331         /* Magic page override */
 332         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 333             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 334             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 335                 void *magic = vcpu->arch.shared;
 336                 magic += pte.eaddr & 0xfff;
 337                 memcpy(magic, ptr, size);
 338                 return EMULATE_DONE;
 339         }
 340
 341         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 342                 return EMULATE_DO_MMIO;
 343
 344         return EMULATE_DONE;
 345 }
 346 EXPORT_SYMBOL_GPL(kvmppc_st);
 347
 348 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 349                       bool data)
 350 {
 351         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 352         struct kvmppc_pte pte;
 353         int rc;
 354
 355         vcpu->stat.ld++;
 356
 357         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 358                           XLATE_READ, &pte);
 359         if (rc)
 360                 return rc;
 361
 362         *eaddr = pte.raddr;
 363
 364         if (!pte.may_read)
 365                 return -EPERM;
 366
 367         if (!data && !pte.may_execute)
 368                 return -ENOEXEC;
 369
 370         /* Magic page override */
 371         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 372             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 373             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 374                 void *magic = vcpu->arch.shared;
 375                 magic += pte.eaddr & 0xfff;
 376                 memcpy(ptr, magic, size);
 377                 return EMULATE_DONE;
 378         }
 379
 380         if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
 381                 return EMULATE_DO_MMIO;
 382
 383         return EMULATE_DONE;
 384 }
 385 EXPORT_SYMBOL_GPL(kvmppc_ld);
 386
 387 int kvm_arch_hardware_enable(void *garbage)
 388 {
 389         return 0;
 390 }
 391
 392 void kvm_arch_hardware_disable(void *garbage)
 393 {
 394 }
 395
 396 int kvm_arch_hardware_setup(void)
 397 {
 398         return 0;
 399 }
 400
 401 void kvm_arch_hardware_unsetup(void)
 402 {
 403 }
 404
 405 void kvm_arch_check_processor_compat(void *rtn)
 406 {
 407         *(int *)rtn = kvmppc_core_check_processor_compat();
 408 }
 409
 410 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 411 {
 412         struct kvmppc_ops *kvm_ops = NULL;
 413         /*
 414          * if we have both HV and PR enabled, default is HV
 415          */
 416         if (type == 0) {
 417                 if (kvmppc_hv_ops)
 418                         kvm_ops = kvmppc_hv_ops;
 419                 else
 420                         kvm_ops = kvmppc_pr_ops;
 421                 if (!kvm_ops)
 422                         goto err_out;
 423         } else  if (type == KVM_VM_PPC_HV) {
 424                 if (!kvmppc_hv_ops)
 425                         goto err_out;
 426                 kvm_ops = kvmppc_hv_ops;
 427         } else if (type == KVM_VM_PPC_PR) {
 428                 if (!kvmppc_pr_ops)
 429                         goto err_out;
 430                 kvm_ops = kvmppc_pr_ops;
 431         } else
 432                 goto err_out;
 433
 434         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
 435                 return -ENOENT;
 436
 437         kvm->arch.kvm_ops = kvm_ops;
 438         return kvmppc_core_init_vm(kvm);
 439 err_out:
 440         return -EINVAL;
 441 }
 442
 443 void kvm_arch_destroy_vm(struct kvm *kvm)
 444 {
 445         unsigned int i;
 446         struct kvm_vcpu *vcpu;
 447
 448         kvm_for_each_vcpu(i, vcpu, kvm)
 449                 kvm_arch_vcpu_free(vcpu);
 450
 451         mutex_lock(&kvm->lock);
 452         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 453                 kvm->vcpus[i] = NULL;
 454
 455         atomic_set(&kvm->online_vcpus, 0);
 456
 457         kvmppc_core_destroy_vm(kvm);
 458
 459         mutex_unlock(&kvm->lock);
 460
 461         /* drop the module reference */
 462         module_put(kvm->arch.kvm_ops->owner);
 463 }
 464
 465 void kvm_arch_sync_events(struct kvm *kvm)
 466 {
 467 }
 468
 469 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 470 {
 471         int r;
 472         /* Assume we're using HV mode when the HV module is loaded */
 473         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 474
 475         if (kvm) {
 476                 /*
 477                  * Hooray - we know which VM type we're running on. Depend on
 478                  * that rather than the guess above.
 479                  */
 480                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 481         }
 482
 483         switch (ext) {
 484 #ifdef CONFIG_BOOKE
 485         case KVM_CAP_PPC_BOOKE_SREGS:
 486         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 487         case KVM_CAP_PPC_EPR:
 488 #else
 489         case KVM_CAP_PPC_SEGSTATE:
 490         case KVM_CAP_PPC_HIOR:
 491         case KVM_CAP_PPC_PAPR:
 492 #endif
 493         case KVM_CAP_PPC_UNSET_IRQ:
 494         case KVM_CAP_PPC_IRQ_LEVEL:
 495         case KVM_CAP_ENABLE_CAP:
 496         case KVM_CAP_ENABLE_CAP_VM:
 497         case KVM_CAP_ONE_REG:
 498         case KVM_CAP_IOEVENTFD:
 499         case KVM_CAP_DEVICE_CTRL:
 500                 r = 1;
 501                 break;
 502         case KVM_CAP_PPC_PAIRED_SINGLES:
 503         case KVM_CAP_PPC_OSI:
 504         case KVM_CAP_PPC_GET_PVINFO:
 505 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 506         case KVM_CAP_SW_TLB:
 507 #endif
 508                 /* We support this only for PR */
 509                 r = !hv_enabled;
 510                 break;
 511 #ifdef CONFIG_KVM_MMIO
 512         case KVM_CAP_COALESCED_MMIO:
 513                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 514                 break;
 515 #endif
 516 #ifdef CONFIG_KVM_MPIC
 517         case KVM_CAP_IRQ_MPIC:
 518                 r = 1;
 519                 break;
 520 #endif
 521
 522 #ifdef CONFIG_PPC_BOOK3S_64
 523         case KVM_CAP_SPAPR_TCE:
 524         case KVM_CAP_PPC_ALLOC_HTAB:
 525         case KVM_CAP_PPC_RTAS:
 526         case KVM_CAP_PPC_FIXUP_HCALL:
 527         case KVM_CAP_PPC_ENABLE_HCALL:
 528 #ifdef CONFIG_KVM_XICS
 529         case KVM_CAP_IRQ_XICS:
 530 #endif
 531                 r = 1;
 532                 break;
 533 #endif /* CONFIG_PPC_BOOK3S_64 */
 534 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 535         case KVM_CAP_PPC_SMT:
 536                 if (hv_enabled)
 537                         r = threads_per_subcore;
 538                 else
 539                         r = 0;
 540                 break;
 541         case KVM_CAP_PPC_RMA:
 542                 r = hv_enabled;
 543                 /* PPC970 requires an RMA */
 544                 if (r && cpu_has_feature(CPU_FTR_ARCH_201))
 545                         r = 2;
 546                 break;
 547 #endif
 548         case KVM_CAP_SYNC_MMU:
 549 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 550                 if (hv_enabled)
 551                         r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
 552                 else
 553                         r = 0;
 554 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 555                 r = 1;
 556 #else
 557                 r = 0;
 558 #endif
 559                 break;
 560 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 561         case KVM_CAP_PPC_HTAB_FD:
 562                 r = hv_enabled;
 563                 break;
 564 #endif
 565         case KVM_CAP_NR_VCPUS:
 566                 /*
 567                  * Recommending a number of CPUs is somewhat arbitrary; we
 568                  * return the number of present CPUs for -HV (since a host
 569                  * will have secondary threads "offline"), and for other KVM
 570                  * implementations just count online CPUs.
 571                  */
 572                 if (hv_enabled)
 573                         r = num_present_cpus();
 574                 else
 575                         r = num_online_cpus();
 576                 break;
 577         case KVM_CAP_MAX_VCPUS:
 578                 r = KVM_MAX_VCPUS;
 579                 break;
 580 #ifdef CONFIG_PPC_BOOK3S_64
 581         case KVM_CAP_PPC_GET_SMMU_INFO:
 582                 r = 1;
 583                 break;
 584 #endif
 585         default:
 586                 r = 0;
 587                 break;
 588         }
 589         return r;
 590
 591 }
 592
 593 long kvm_arch_dev_ioctl(struct file *filp,
 594                         unsigned int ioctl, unsigned long arg)
 595 {
 596         return -EINVAL;
 597 }
 598
 599 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 600                            struct kvm_memory_slot *dont)
 601 {
 602         kvmppc_core_free_memslot(kvm, free, dont);
 603 }
 604
 605 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 606                             unsigned long npages)
 607 {
 608         return kvmppc_core_create_memslot(kvm, slot, npages);
 609 }
 610
 611 void kvm_arch_memslots_updated(struct kvm *kvm)
 612 {
 613 }
 614
 615 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 616                                    struct kvm_memory_slot *memslot,
 617                                    struct kvm_userspace_memory_region *mem,
 618                                    enum kvm_mr_change change)
 619 {
 620         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 621 }
 622
 623 void kvm_arch_commit_memory_region(struct kvm *kvm,
 624                                    struct kvm_userspace_memory_region *mem,
 625                                    const struct kvm_memory_slot *old,
 626                                    enum kvm_mr_change change)
 627 {
 628         kvmppc_core_commit_memory_region(kvm, mem, old);
 629 }
 630
 631 void kvm_arch_flush_shadow_all(struct kvm *kvm)
 632 {
 633 }
 634
 635 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 636                                    struct kvm_memory_slot *slot)
 637 {
 638         kvmppc_core_flush_memslot(kvm, slot);
 639 }
 640
 641 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 642 {
 643         struct kvm_vcpu *vcpu;
 644         vcpu = kvmppc_core_vcpu_create(kvm, id);
 645         if (!IS_ERR(vcpu)) {
 646                 vcpu->arch.wqp = &vcpu->wq;
 647                 kvmppc_create_vcpu_debugfs(vcpu, id);
 648         }
 649         return vcpu;
 650 }
 651
 652 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 653 {
 654         return 0;
 655 }
 656
 657 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 658 {
 659         /* Make sure we're not using the vcpu anymore */
 660         hrtimer_cancel(&vcpu->arch.dec_timer);
 661         tasklet_kill(&vcpu->arch.tasklet);
 662
 663         kvmppc_remove_vcpu_debugfs(vcpu);
 664
 665         switch (vcpu->arch.irq_type) {
 666         case KVMPPC_IRQ_MPIC:
 667                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 668                 break;
 669         case KVMPPC_IRQ_XICS:
 670                 kvmppc_xics_free_icp(vcpu);
 671                 break;
 672         }
 673
 674         kvmppc_core_vcpu_free(vcpu);
 675 }
 676
 677 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 678 {
 679         kvm_arch_vcpu_free(vcpu);
 680 }
 681
 682 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 683 {
 684         return kvmppc_core_pending_dec(vcpu);
 685 }
 686
 687 /*
 688  * low level hrtimer wake routine. Because this runs in hardirq context
 689  * we schedule a tasklet to do the real work.
 690  */
 691 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 692 {
 693         struct kvm_vcpu *vcpu;
 694
 695         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 696         tasklet_schedule(&vcpu->arch.tasklet);
 697
 698         return HRTIMER_NORESTART;
 699 }
 700
 701 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 702 {
 703         int ret;
 704
 705         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 706         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 707         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 708         vcpu->arch.dec_expires = ~(u64)0;
 709
 710 #ifdef CONFIG_KVM_EXIT_TIMING
 711         mutex_init(&vcpu->arch.exit_timing_lock);
 712 #endif
 713         ret = kvmppc_subarch_vcpu_init(vcpu);
 714         return ret;
 715 }
 716
 717 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 718 {
 719         kvmppc_mmu_destroy(vcpu);
 720         kvmppc_subarch_vcpu_uninit(vcpu);
 721 }
 722
 723 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 724 {
 725 #ifdef CONFIG_BOOKE
 726         /*
 727          * vrsave (formerly usprg0) isn't used by Linux, but may
 728          * be used by the guest.
 729          *
 730          * On non-booke this is associated with Altivec and
 731          * is handled by code in book3s.c.
 732          */
 733         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 734 #endif
 735         kvmppc_core_vcpu_load(vcpu, cpu);
 736 }
 737
 738 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 739 {
 740         kvmppc_core_vcpu_put(vcpu);
 741 #ifdef CONFIG_BOOKE
 742         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 743 #endif
 744 }
 745
 746 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 747                                       struct kvm_run *run)
 748 {
 749         u64 uninitialized_var(gpr);
 750
 751         if (run->mmio.len > sizeof(gpr)) {
 752                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 753                 return;
 754         }
 755
 756         if (vcpu->arch.mmio_is_bigendian) {
 757                 switch (run->mmio.len) {
 758                 case 8: gpr = *(u64 *)run->mmio.data; break;
 759                 case 4: gpr = *(u32 *)run->mmio.data; break;
 760                 case 2: gpr = *(u16 *)run->mmio.data; break;
 761                 case 1: gpr = *(u8 *)run->mmio.data; break;
 762                 }
 763         } else {
 764                 /* Convert BE data from userland back to LE. */
 765                 switch (run->mmio.len) {
 766                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 767                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 768                 case 1: gpr = *(u8 *)run->mmio.data; break;
 769                 }
 770         }
 771
 772         if (vcpu->arch.mmio_sign_extend) {
 773                 switch (run->mmio.len) {
 774 #ifdef CONFIG_PPC64
 775                 case 4:
 776                         gpr = (s64)(s32)gpr;
 777                         break;
 778 #endif
 779                 case 2:
 780                         gpr = (s64)(s16)gpr;
 781                         break;
 782                 case 1:
 783                         gpr = (s64)(s8)gpr;
 784                         break;
 785                 }
 786         }
 787
 788         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 789
 790         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
 791         case KVM_MMIO_REG_GPR:
 792                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 793                 break;
 794         case KVM_MMIO_REG_FPR:
 795                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 796                 break;
 797 #ifdef CONFIG_PPC_BOOK3S
 798         case KVM_MMIO_REG_QPR:
 799                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 800                 break;
 801         case KVM_MMIO_REG_FQPR:
 802                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 803                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 804                 break;
 805 #endif
 806         default:
 807                 BUG();
 808         }
 809 }
 810
 811 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 812                        unsigned int rt, unsigned int bytes,
 813                        int is_default_endian)
 814 {
 815         int idx, ret;
 816         int is_bigendian;
 817
 818         if (kvmppc_need_byteswap(vcpu)) {
 819                 /* Default endianness is "little endian". */
 820                 is_bigendian = !is_default_endian;
 821         } else {
 822                 /* Default endianness is "big endian". */
 823                 is_bigendian = is_default_endian;
 824         }
 825
 826         if (bytes > sizeof(run->mmio.data)) {
 827                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 828                        run->mmio.len);
 829         }
 830
 831         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 832         run->mmio.len = bytes;
 833         run->mmio.is_write = 0;
 834
 835         vcpu->arch.io_gpr = rt;
 836         vcpu->arch.mmio_is_bigendian = is_bigendian;
 837         vcpu->mmio_needed = 1;
 838         vcpu->mmio_is_write = 0;
 839         vcpu->arch.mmio_sign_extend = 0;
 840
 841         idx = srcu_read_lock(&vcpu->kvm->srcu);
 842
 843         ret = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
 844                               bytes, &run->mmio.data);
 845
 846         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 847
 848         if (!ret) {
 849                 kvmppc_complete_mmio_load(vcpu, run);
 850                 vcpu->mmio_needed = 0;
 851                 return EMULATE_DONE;
 852         }
 853
 854         return EMULATE_DO_MMIO;
 855 }
 856 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
 857
 858 /* Same as above, but sign extends */
 859 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 860                         unsigned int rt, unsigned int bytes,
 861                         int is_default_endian)
 862 {
 863         int r;
 864
 865         vcpu->arch.mmio_sign_extend = 1;
 866         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
 867
 868         return r;
 869 }
 870
 871 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 872                         u64 val, unsigned int bytes, int is_default_endian)
 873 {
 874         void *data = run->mmio.data;
 875         int idx, ret;
 876         int is_bigendian;
 877
 878         if (kvmppc_need_byteswap(vcpu)) {
 879                 /* Default endianness is "little endian". */
 880                 is_bigendian = !is_default_endian;
 881         } else {
 882                 /* Default endianness is "big endian". */
 883                 is_bigendian = is_default_endian;
 884         }
 885
 886         if (bytes > sizeof(run->mmio.data)) {
 887                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 888                        run->mmio.len);
 889         }
 890
 891         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 892         run->mmio.len = bytes;
 893         run->mmio.is_write = 1;
 894         vcpu->mmio_needed = 1;
 895         vcpu->mmio_is_write = 1;
 896
 897         /* Store the value at the lowest bytes in 'data'. */
 898         if (is_bigendian) {
 899                 switch (bytes) {
 900                 case 8: *(u64 *)data = val; break;
 901                 case 4: *(u32 *)data = val; break;
 902                 case 2: *(u16 *)data = val; break;
 903                 case 1: *(u8  *)data = val; break;
 904                 }
 905         } else {
 906                 /* Store LE value into 'data'. */
 907                 switch (bytes) {
 908                 case 4: st_le32(data, val); break;
 909                 case 2: st_le16(data, val); break;
 910                 case 1: *(u8 *)data = val; break;
 911                 }
 912         }
 913
 914         idx = srcu_read_lock(&vcpu->kvm->srcu);
 915
 916         ret = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
 917                                bytes, &run->mmio.data);
 918
 919         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 920
 921         if (!ret) {
 922                 vcpu->mmio_needed = 0;
 923                 return EMULATE_DONE;
 924         }
 925
 926         return EMULATE_DO_MMIO;
 927 }
 928 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
 929
 930 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 931 {
 932         int r;
 933         sigset_t sigsaved;
 934
 935         if (vcpu->sigset_active)
 936                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 937
 938         if (vcpu->mmio_needed) {
 939                 if (!vcpu->mmio_is_write)
 940                         kvmppc_complete_mmio_load(vcpu, run);
 941                 vcpu->mmio_needed = 0;
 942         } else if (vcpu->arch.osi_needed) {
 943                 u64 *gprs = run->osi.gprs;
 944                 int i;
 945
 946                 for (i = 0; i < 32; i++)
 947                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 948                 vcpu->arch.osi_needed = 0;
 949         } else if (vcpu->arch.hcall_needed) {
 950                 int i;
 951
 952                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 953                 for (i = 0; i < 9; ++i)
 954                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 955                 vcpu->arch.hcall_needed = 0;
 956 #ifdef CONFIG_BOOKE
 957         } else if (vcpu->arch.epr_needed) {
 958                 kvmppc_set_epr(vcpu, run->epr.epr);
 959                 vcpu->arch.epr_needed = 0;
 960 #endif
 961         }
 962
 963         r = kvmppc_vcpu_run(run, vcpu);
 964
 965         if (vcpu->sigset_active)
 966                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 967
 968         return r;
 969 }
 970
 971 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 972 {
 973         if (irq->irq == KVM_INTERRUPT_UNSET) {
 974                 kvmppc_core_dequeue_external(vcpu);
 975                 return 0;
 976         }
 977
 978         kvmppc_core_queue_external(vcpu, irq);
 979
 980         kvm_vcpu_kick(vcpu);
 981
 982         return 0;
 983 }
 984
 985 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 986                                      struct kvm_enable_cap *cap)
 987 {
 988         int r;
 989
 990         if (cap->flags)
 991                 return -EINVAL;
 992
 993         switch (cap->cap) {
 994         case KVM_CAP_PPC_OSI:
 995                 r = 0;
 996                 vcpu->arch.osi_enabled = true;
 997                 break;
 998         case KVM_CAP_PPC_PAPR:
 999                 r = 0;
1000                 vcpu->arch.papr_enabled = true;
1001                 break;
1002         case KVM_CAP_PPC_EPR:
1003                 r = 0;
1004                 if (cap->args[0])
1005                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1006                 else
1007                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1008                 break;
1009 #ifdef CONFIG_BOOKE
1010         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1011                 r = 0;
1012                 vcpu->arch.watchdog_enabled = true;
1013                 break;
1014 #endif
1015 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1016         case KVM_CAP_SW_TLB: {
1017                 struct kvm_config_tlb cfg;
1018                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1019
1020                 r = -EFAULT;
1021                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1022                         break;
1023
1024                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1025                 break;
1026         }
1027 #endif
1028 #ifdef CONFIG_KVM_MPIC
1029         case KVM_CAP_IRQ_MPIC: {
1030                 struct fd f;
1031                 struct kvm_device *dev;
1032
1033                 r = -EBADF;
1034                 f = fdget(cap->args[0]);
1035                 if (!f.file)
1036                         break;
1037
1038                 r = -EPERM;
1039                 dev = kvm_device_from_filp(f.file);
1040                 if (dev)
1041                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1042
1043                 fdput(f);
1044                 break;
1045         }
1046 #endif
1047 #ifdef CONFIG_KVM_XICS
1048         case KVM_CAP_IRQ_XICS: {
1049                 struct fd f;
1050                 struct kvm_device *dev;
1051
1052                 r = -EBADF;
1053                 f = fdget(cap->args[0]);
1054                 if (!f.file)
1055                         break;
1056
1057                 r = -EPERM;
1058                 dev = kvm_device_from_filp(f.file);
1059                 if (dev)
1060                         r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1061
1062                 fdput(f);
1063                 break;
1064         }
1065 #endif /* CONFIG_KVM_XICS */
1066         default:
1067                 r = -EINVAL;
1068                 break;
1069         }
1070
1071         if (!r)
1072                 r = kvmppc_sanity_check(vcpu);
1073
1074         return r;
1075 }
1076
1077 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1078                                     struct kvm_mp_state *mp_state)
1079 {
1080         return -EINVAL;
1081 }
1082
1083 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1084                                     struct kvm_mp_state *mp_state)
1085 {
1086         return -EINVAL;
1087 }
1088
1089 long kvm_arch_vcpu_ioctl(struct file *filp,
1090                          unsigned int ioctl, unsigned long arg)
1091 {
1092         struct kvm_vcpu *vcpu = filp->private_data;
1093         void __user *argp = (void __user *)arg;
1094         long r;
1095
1096         switch (ioctl) {
1097         case KVM_INTERRUPT: {
1098                 struct kvm_interrupt irq;
1099                 r = -EFAULT;
1100                 if (copy_from_user(&irq, argp, sizeof(irq)))
1101                         goto out;
1102                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1103                 goto out;
1104         }
1105
1106         case KVM_ENABLE_CAP:
1107         {
1108                 struct kvm_enable_cap cap;
1109                 r = -EFAULT;
1110                 if (copy_from_user(&cap, argp, sizeof(cap)))
1111                         goto out;
1112                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1113                 break;
1114         }
1115
1116         case KVM_SET_ONE_REG:
1117         case KVM_GET_ONE_REG:
1118         {
1119                 struct kvm_one_reg reg;
1120                 r = -EFAULT;
1121                 if (copy_from_user(&reg, argp, sizeof(reg)))
1122                         goto out;
1123                 if (ioctl == KVM_SET_ONE_REG)
1124                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1125                 else
1126                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1127                 break;
1128         }
1129
1130 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1131         case KVM_DIRTY_TLB: {
1132                 struct kvm_dirty_tlb dirty;
1133                 r = -EFAULT;
1134                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1135                         goto out;
1136                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1137                 break;
1138         }
1139 #endif
1140         default:
1141                 r = -EINVAL;
1142         }
1143
1144 out:
1145         return r;
1146 }
1147
1148 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1149 {
1150         return VM_FAULT_SIGBUS;
1151 }
1152
1153 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1154 {
1155         u32 inst_nop = 0x60000000;
1156 #ifdef CONFIG_KVM_BOOKE_HV
1157         u32 inst_sc1 = 0x44000022;
1158         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1159         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1160         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1161         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1162 #else
1163         u32 inst_lis = 0x3c000000;
1164         u32 inst_ori = 0x60000000;
1165         u32 inst_sc = 0x44000002;
1166         u32 inst_imm_mask = 0xffff;
1167
1168         /*
1169          * The hypercall to get into KVM from within guest context is as
1170          * follows:
1171          *
1172          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1173          *    ori r0, KVM_SC_MAGIC_R0@l
1174          *    sc
1175          *    nop
1176          */
1177         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1178         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1179         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1180         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1181 #endif
1182
1183         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1184
1185         return 0;
1186 }
1187
1188 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1189                           bool line_status)
1190 {
1191         if (!irqchip_in_kernel(kvm))
1192                 return -ENXIO;
1193
1194         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1195                                         irq_event->irq, irq_event->level,
1196                                         line_status);
1197         return 0;
1198 }
1199
1200
1201 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1202                                    struct kvm_enable_cap *cap)
1203 {
1204         int r;
1205
1206         if (cap->flags)
1207                 return -EINVAL;
1208
1209         switch (cap->cap) {
1210 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1211         case KVM_CAP_PPC_ENABLE_HCALL: {
1212                 unsigned long hcall = cap->args[0];
1213
1214                 r = -EINVAL;
1215                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1216                     cap->args[1] > 1)
1217                         break;
1218                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1219                         break;
1220                 if (cap->args[1])
1221                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1222                 else
1223                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1224                 r = 0;
1225                 break;
1226         }
1227 #endif
1228         default:
1229                 r = -EINVAL;
1230                 break;
1231         }
1232
1233         return r;
1234 }
1235
1236 long kvm_arch_vm_ioctl(struct file *filp,
1237                        unsigned int ioctl, unsigned long arg)
1238 {
1239         struct kvm *kvm __maybe_unused = filp->private_data;
1240         void __user *argp = (void __user *)arg;
1241         long r;
1242
1243         switch (ioctl) {
1244         case KVM_PPC_GET_PVINFO: {
1245                 struct kvm_ppc_pvinfo pvinfo;
1246                 memset(&pvinfo, 0, sizeof(pvinfo));
1247                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1248                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1249                         r = -EFAULT;
1250                         goto out;
1251                 }
1252
1253                 break;
1254         }
1255         case KVM_ENABLE_CAP:
1256         {
1257                 struct kvm_enable_cap cap;
1258                 r = -EFAULT;
1259                 if (copy_from_user(&cap, argp, sizeof(cap)))
1260                         goto out;
1261                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1262                 break;
1263         }
1264 #ifdef CONFIG_PPC_BOOK3S_64
1265         case KVM_CREATE_SPAPR_TCE: {
1266                 struct kvm_create_spapr_tce create_tce;
1267
1268                 r = -EFAULT;
1269                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1270                         goto out;
1271                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
1272                 goto out;
1273         }
1274         case KVM_PPC_GET_SMMU_INFO: {
1275                 struct kvm_ppc_smmu_info info;
1276                 struct kvm *kvm = filp->private_data;
1277
1278                 memset(&info, 0, sizeof(info));
1279                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1280                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1281                         r = -EFAULT;
1282                 break;
1283         }
1284         case KVM_PPC_RTAS_DEFINE_TOKEN: {
1285                 struct kvm *kvm = filp->private_data;
1286
1287                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1288                 break;
1289         }
1290         default: {
1291                 struct kvm *kvm = filp->private_data;
1292                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1293         }
1294 #else /* CONFIG_PPC_BOOK3S_64 */
1295         default:
1296                 r = -ENOTTY;
1297 #endif
1298         }
1299 out:
1300         return r;
1301 }
1302
1303 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1304 static unsigned long nr_lpids;
1305
1306 long kvmppc_alloc_lpid(void)
1307 {
1308         long lpid;
1309
1310         do {
1311                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1312                 if (lpid >= nr_lpids) {
1313                         pr_err("%s: No LPIDs free\n", __func__);
1314                         return -ENOMEM;
1315                 }
1316         } while (test_and_set_bit(lpid, lpid_inuse));
1317
1318         return lpid;
1319 }
1320 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1321
1322 void kvmppc_claim_lpid(long lpid)
1323 {
1324         set_bit(lpid, lpid_inuse);
1325 }
1326 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1327
1328 void kvmppc_free_lpid(long lpid)
1329 {
1330         clear_bit(lpid, lpid_inuse);
1331 }
1332 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1333
1334 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1335 {
1336         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1337         memset(lpid_inuse, 0, sizeof(lpid_inuse));
1338 }
1339 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1340
1341 int kvm_arch_init(void *opaque)
1342 {
1343         return 0;
1344 }
1345
1346 void kvm_arch_exit(void)
1347 {
1348
1349 }
1350
1351 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);