arch/powerpc/kvm/powerpc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *
   4  * Copyright IBM Corp. 2007
   5  *
   6  * Authors: Hollis Blanchard <[email protected]>
   7  *          Christian Ehrhardt <[email protected]>
   8  */
   9
  10 #include <linux/errno.h>
  11 #include <linux/err.h>
  12 #include <linux/kvm_host.h>
  13 #include <linux/vmalloc.h>
  14 #include <linux/hrtimer.h>
  15 #include <linux/sched/signal.h>
  16 #include <linux/fs.h>
  17 #include <linux/slab.h>
  18 #include <linux/file.h>
  19 #include <linux/module.h>
  20 #include <linux/irqbypass.h>
  21 #include <linux/kvm_irqfd.h>
  22 #include <asm/cputable.h>
  23 #include <linux/uaccess.h>
  24 #include <asm/kvm_ppc.h>
  25 #include <asm/cputhreads.h>
  26 #include <asm/irqflags.h>
  27 #include <asm/iommu.h>
  28 #include <asm/switch_to.h>
  29 #include <asm/xive.h>
  30 #ifdef CONFIG_PPC_PSERIES
  31 #include <asm/hvcall.h>
  32 #include <asm/plpar_wrappers.h>
  33 #endif
  34
  35 #include "timing.h"
  36 #include "irq.h"
  37 #include "../mm/mmu_decl.h"
  38
  39 #define CREATE_TRACE_POINTS
  40 #include "trace.h"
  41
  42 struct kvmppc_ops *kvmppc_hv_ops;
  43 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
  44 struct kvmppc_ops *kvmppc_pr_ops;
  45 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
  46
  47
  48 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  49 {
  50         return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
  51 }
  52
  53 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
  54 {
  55         return false;
  56 }
  57
  58 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  59 {
  60         return 1;
  61 }
  62
  63 /*
  64  * Common checks before entering the guest world.  Call with interrupts
  65  * disabled.
  66  *
  67  * returns:
  68  *
  69  * == 1 if we're ready to go into guest state
  70  * <= 0 if we need to go back to the host with return value
  71  */
  72 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
  73 {
  74         int r;
  75
  76         WARN_ON(irqs_disabled());
  77         hard_irq_disable();
  78
  79         while (true) {
  80                 if (need_resched()) {
  81                         local_irq_enable();
  82                         cond_resched();
  83                         hard_irq_disable();
  84                         continue;
  85                 }
  86
  87                 if (signal_pending(current)) {
  88                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
  89                         vcpu->run->exit_reason = KVM_EXIT_INTR;
  90                         r = -EINTR;
  91                         break;
  92                 }
  93
  94                 vcpu->mode = IN_GUEST_MODE;
  95
  96                 /*
  97                  * Reading vcpu->requests must happen after setting vcpu->mode,
  98                  * so we don't miss a request because the requester sees
  99                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
 100                  * before next entering the guest (and thus doesn't IPI).
 101                  * This also orders the write to mode from any reads
 102                  * to the page tables done while the VCPU is running.
 103                  * Please see the comment in kvm_flush_remote_tlbs.
 104                  */
 105                 smp_mb();
 106
 107                 if (kvm_request_pending(vcpu)) {
 108                         /* Make sure we process requests preemptable */
 109                         local_irq_enable();
 110                         trace_kvm_check_requests(vcpu);
 111                         r = kvmppc_core_check_requests(vcpu);
 112                         hard_irq_disable();
 113                         if (r > 0)
 114                                 continue;
 115                         break;
 116                 }
 117
 118                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 119                         /* interrupts got enabled in between, so we
 120                            are back at square 1 */
 121                         continue;
 122                 }
 123
 124                 guest_enter_irqoff();
 125                 return 1;
 126         }
 127
 128         /* return to host */
 129         local_irq_enable();
 130         return r;
 131 }
 132 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
 133
 134 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 135 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
 136 {
 137         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
 138         int i;
 139
 140         shared->sprg0 = swab64(shared->sprg0);
 141         shared->sprg1 = swab64(shared->sprg1);
 142         shared->sprg2 = swab64(shared->sprg2);
 143         shared->sprg3 = swab64(shared->sprg3);
 144         shared->srr0 = swab64(shared->srr0);
 145         shared->srr1 = swab64(shared->srr1);
 146         shared->dar = swab64(shared->dar);
 147         shared->msr = swab64(shared->msr);
 148         shared->dsisr = swab32(shared->dsisr);
 149         shared->int_pending = swab32(shared->int_pending);
 150         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
 151                 shared->sr[i] = swab32(shared->sr[i]);
 152 }
 153 #endif
 154
 155 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
 156 {
 157         int nr = kvmppc_get_gpr(vcpu, 11);
 158         int r;
 159         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
 160         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
 161         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
 162         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
 163         unsigned long r2 = 0;
 164
 165         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 166                 /* 32 bit mode */
 167                 param1 &= 0xffffffff;
 168                 param2 &= 0xffffffff;
 169                 param3 &= 0xffffffff;
 170                 param4 &= 0xffffffff;
 171         }
 172
 173         switch (nr) {
 174         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
 175         {
 176 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 177                 /* Book3S can be little endian, find it out here */
 178                 int shared_big_endian = true;
 179                 if (vcpu->arch.intr_msr & MSR_LE)
 180                         shared_big_endian = false;
 181                 if (shared_big_endian != vcpu->arch.shared_big_endian)
 182                         kvmppc_swab_shared(vcpu);
 183                 vcpu->arch.shared_big_endian = shared_big_endian;
 184 #endif
 185
 186                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
 187                         /*
 188                          * Older versions of the Linux magic page code had
 189                          * a bug where they would map their trampoline code
 190                          * NX. If that's the case, remove !PR NX capability.
 191                          */
 192                         vcpu->arch.disable_kernel_nx = true;
 193                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 194                 }
 195
 196                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
 197                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
 198
 199 #ifdef CONFIG_PPC_64K_PAGES
 200                 /*
 201                  * Make sure our 4k magic page is in the same window of a 64k
 202                  * page within the guest and within the host's page.
 203                  */
 204                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
 205                     ((ulong)vcpu->arch.shared & 0xf000)) {
 206                         void *old_shared = vcpu->arch.shared;
 207                         ulong shared = (ulong)vcpu->arch.shared;
 208                         void *new_shared;
 209
 210                         shared &= PAGE_MASK;
 211                         shared |= vcpu->arch.magic_page_pa & 0xf000;
 212                         new_shared = (void*)shared;
 213                         memcpy(new_shared, old_shared, 0x1000);
 214                         vcpu->arch.shared = new_shared;
 215                 }
 216 #endif
 217
 218                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
 219
 220                 r = EV_SUCCESS;
 221                 break;
 222         }
 223         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
 224                 r = EV_SUCCESS;
 225 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
 226                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
 227 #endif
 228
 229                 /* Second return value is in r4 */
 230                 break;
 231         case EV_HCALL_TOKEN(EV_IDLE):
 232                 r = EV_SUCCESS;
 233                 kvm_vcpu_block(vcpu);
 234                 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
 235                 break;
 236         default:
 237                 r = EV_UNIMPLEMENTED;
 238                 break;
 239         }
 240
 241         kvmppc_set_gpr(vcpu, 4, r2);
 242
 243         return r;
 244 }
 245 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
 246
 247 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 248 {
 249         int r = false;
 250
 251         /* We have to know what CPU to virtualize */
 252         if (!vcpu->arch.pvr)
 253                 goto out;
 254
 255         /* PAPR only works with book3s_64 */
 256         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 257                 goto out;
 258
 259         /* HV KVM can only do PAPR mode for now */
 260         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
 261                 goto out;
 262
 263 #ifdef CONFIG_KVM_BOOKE_HV
 264         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 265                 goto out;
 266 #endif
 267
 268         r = true;
 269
 270 out:
 271         vcpu->arch.sane = r;
 272         return r ? 0 : -EINVAL;
 273 }
 274 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
 275
 276 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 277 {
 278         enum emulation_result er;
 279         int r;
 280
 281         er = kvmppc_emulate_loadstore(vcpu);
 282         switch (er) {
 283         case EMULATE_DONE:
 284                 /* Future optimization: only reload non-volatiles if they were
 285                  * actually modified. */
 286                 r = RESUME_GUEST_NV;
 287                 break;
 288         case EMULATE_AGAIN:
 289                 r = RESUME_GUEST;
 290                 break;
 291         case EMULATE_DO_MMIO:
 292                 run->exit_reason = KVM_EXIT_MMIO;
 293                 /* We must reload nonvolatiles because "update" load/store
 294                  * instructions modify register state. */
 295                 /* Future optimization: only reload non-volatiles if they were
 296                  * actually modified. */
 297                 r = RESUME_HOST_NV;
 298                 break;
 299         case EMULATE_FAIL:
 300         {
 301                 u32 last_inst;
 302
 303                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
 304                 /* XXX Deliver Program interrupt to guest. */
 305                 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
 306                 r = RESUME_HOST;
 307                 break;
 308         }
 309         default:
 310                 WARN_ON(1);
 311                 r = RESUME_GUEST;
 312         }
 313
 314         return r;
 315 }
 316 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
 317
 318 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 319               bool data)
 320 {
 321         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 322         struct kvmppc_pte pte;
 323         int r = -EINVAL;
 324
 325         vcpu->stat.st++;
 326
 327         if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->store_to_eaddr)
 328                 r = vcpu->kvm->arch.kvm_ops->store_to_eaddr(vcpu, eaddr, ptr,
 329                                                             size);
 330
 331         if ((!r) || (r == -EAGAIN))
 332                 return r;
 333
 334         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 335                          XLATE_WRITE, &pte);
 336         if (r < 0)
 337                 return r;
 338
 339         *eaddr = pte.raddr;
 340
 341         if (!pte.may_write)
 342                 return -EPERM;
 343
 344         /* Magic page override */
 345         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 346             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 347             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 348                 void *magic = vcpu->arch.shared;
 349                 magic += pte.eaddr & 0xfff;
 350                 memcpy(magic, ptr, size);
 351                 return EMULATE_DONE;
 352         }
 353
 354         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 355                 return EMULATE_DO_MMIO;
 356
 357         return EMULATE_DONE;
 358 }
 359 EXPORT_SYMBOL_GPL(kvmppc_st);
 360
 361 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 362                       bool data)
 363 {
 364         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 365         struct kvmppc_pte pte;
 366         int rc = -EINVAL;
 367
 368         vcpu->stat.ld++;
 369
 370         if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->load_from_eaddr)
 371                 rc = vcpu->kvm->arch.kvm_ops->load_from_eaddr(vcpu, eaddr, ptr,
 372                                                               size);
 373
 374         if ((!rc) || (rc == -EAGAIN))
 375                 return rc;
 376
 377         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 378                           XLATE_READ, &pte);
 379         if (rc)
 380                 return rc;
 381
 382         *eaddr = pte.raddr;
 383
 384         if (!pte.may_read)
 385                 return -EPERM;
 386
 387         if (!data && !pte.may_execute)
 388                 return -ENOEXEC;
 389
 390         /* Magic page override */
 391         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 392             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 393             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 394                 void *magic = vcpu->arch.shared;
 395                 magic += pte.eaddr & 0xfff;
 396                 memcpy(ptr, magic, size);
 397                 return EMULATE_DONE;
 398         }
 399
 400         if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
 401                 return EMULATE_DO_MMIO;
 402
 403         return EMULATE_DONE;
 404 }
 405 EXPORT_SYMBOL_GPL(kvmppc_ld);
 406
 407 int kvm_arch_hardware_enable(void)
 408 {
 409         return 0;
 410 }
 411
 412 int kvm_arch_hardware_setup(void)
 413 {
 414         return 0;
 415 }
 416
 417 void kvm_arch_check_processor_compat(void *rtn)
 418 {
 419         *(int *)rtn = kvmppc_core_check_processor_compat();
 420 }
 421
 422 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 423 {
 424         struct kvmppc_ops *kvm_ops = NULL;
 425         /*
 426          * if we have both HV and PR enabled, default is HV
 427          */
 428         if (type == 0) {
 429                 if (kvmppc_hv_ops)
 430                         kvm_ops = kvmppc_hv_ops;
 431                 else
 432                         kvm_ops = kvmppc_pr_ops;
 433                 if (!kvm_ops)
 434                         goto err_out;
 435         } else  if (type == KVM_VM_PPC_HV) {
 436                 if (!kvmppc_hv_ops)
 437                         goto err_out;
 438                 kvm_ops = kvmppc_hv_ops;
 439         } else if (type == KVM_VM_PPC_PR) {
 440                 if (!kvmppc_pr_ops)
 441                         goto err_out;
 442                 kvm_ops = kvmppc_pr_ops;
 443         } else
 444                 goto err_out;
 445
 446         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
 447                 return -ENOENT;
 448
 449         kvm->arch.kvm_ops = kvm_ops;
 450         return kvmppc_core_init_vm(kvm);
 451 err_out:
 452         return -EINVAL;
 453 }
 454
 455 bool kvm_arch_has_vcpu_debugfs(void)
 456 {
 457         return false;
 458 }
 459
 460 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
 461 {
 462         return 0;
 463 }
 464
 465 void kvm_arch_destroy_vm(struct kvm *kvm)
 466 {
 467         unsigned int i;
 468         struct kvm_vcpu *vcpu;
 469
 470 #ifdef CONFIG_KVM_XICS
 471         /*
 472          * We call kick_all_cpus_sync() to ensure that all
 473          * CPUs have executed any pending IPIs before we
 474          * continue and free VCPUs structures below.
 475          */
 476         if (is_kvmppc_hv_enabled(kvm))
 477                 kick_all_cpus_sync();
 478 #endif
 479
 480         kvm_for_each_vcpu(i, vcpu, kvm)
 481                 kvm_arch_vcpu_free(vcpu);
 482
 483         mutex_lock(&kvm->lock);
 484         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 485                 kvm->vcpus[i] = NULL;
 486
 487         atomic_set(&kvm->online_vcpus, 0);
 488
 489         kvmppc_core_destroy_vm(kvm);
 490
 491         mutex_unlock(&kvm->lock);
 492
 493         /* drop the module reference */
 494         module_put(kvm->arch.kvm_ops->owner);
 495 }
 496
 497 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 498 {
 499         int r;
 500         /* Assume we're using HV mode when the HV module is loaded */
 501         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 502
 503         if (kvm) {
 504                 /*
 505                  * Hooray - we know which VM type we're running on. Depend on
 506                  * that rather than the guess above.
 507                  */
 508                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 509         }
 510
 511         switch (ext) {
 512 #ifdef CONFIG_BOOKE
 513         case KVM_CAP_PPC_BOOKE_SREGS:
 514         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 515         case KVM_CAP_PPC_EPR:
 516 #else
 517         case KVM_CAP_PPC_SEGSTATE:
 518         case KVM_CAP_PPC_HIOR:
 519         case KVM_CAP_PPC_PAPR:
 520 #endif
 521         case KVM_CAP_PPC_UNSET_IRQ:
 522         case KVM_CAP_PPC_IRQ_LEVEL:
 523         case KVM_CAP_ENABLE_CAP:
 524         case KVM_CAP_ONE_REG:
 525         case KVM_CAP_IOEVENTFD:
 526         case KVM_CAP_DEVICE_CTRL:
 527         case KVM_CAP_IMMEDIATE_EXIT:
 528                 r = 1;
 529                 break;
 530         case KVM_CAP_PPC_PAIRED_SINGLES:
 531         case KVM_CAP_PPC_OSI:
 532         case KVM_CAP_PPC_GET_PVINFO:
 533 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 534         case KVM_CAP_SW_TLB:
 535 #endif
 536                 /* We support this only for PR */
 537                 r = !hv_enabled;
 538                 break;
 539 #ifdef CONFIG_KVM_MPIC
 540         case KVM_CAP_IRQ_MPIC:
 541                 r = 1;
 542                 break;
 543 #endif
 544
 545 #ifdef CONFIG_PPC_BOOK3S_64
 546         case KVM_CAP_SPAPR_TCE:
 547         case KVM_CAP_SPAPR_TCE_64:
 548                 r = 1;
 549                 break;
 550         case KVM_CAP_SPAPR_TCE_VFIO:
 551                 r = !!cpu_has_feature(CPU_FTR_HVMODE);
 552                 break;
 553         case KVM_CAP_PPC_RTAS:
 554         case KVM_CAP_PPC_FIXUP_HCALL:
 555         case KVM_CAP_PPC_ENABLE_HCALL:
 556 #ifdef CONFIG_KVM_XICS
 557         case KVM_CAP_IRQ_XICS:
 558 #endif
 559         case KVM_CAP_PPC_GET_CPU_CHAR:
 560                 r = 1;
 561                 break;
 562 #ifdef CONFIG_KVM_XIVE
 563         case KVM_CAP_PPC_IRQ_XIVE:
 564                 /*
 565                  * We need XIVE to be enabled on the platform (implies
 566                  * a POWER9 processor) and the PowerNV platform, as
 567                  * nested is not yet supported.
 568                  */
 569                 r = xive_enabled() && !!cpu_has_feature(CPU_FTR_HVMODE);
 570                 break;
 571 #endif
 572
 573         case KVM_CAP_PPC_ALLOC_HTAB:
 574                 r = hv_enabled;
 575                 break;
 576 #endif /* CONFIG_PPC_BOOK3S_64 */
 577 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 578         case KVM_CAP_PPC_SMT:
 579                 r = 0;
 580                 if (kvm) {
 581                         if (kvm->arch.emul_smt_mode > 1)
 582                                 r = kvm->arch.emul_smt_mode;
 583                         else
 584                                 r = kvm->arch.smt_mode;
 585                 } else if (hv_enabled) {
 586                         if (cpu_has_feature(CPU_FTR_ARCH_300))
 587                                 r = 1;
 588                         else
 589                                 r = threads_per_subcore;
 590                 }
 591                 break;
 592         case KVM_CAP_PPC_SMT_POSSIBLE:
 593                 r = 1;
 594                 if (hv_enabled) {
 595                         if (!cpu_has_feature(CPU_FTR_ARCH_300))
 596                                 r = ((threads_per_subcore << 1) - 1);
 597                         else
 598                                 /* P9 can emulate dbells, so allow any mode */
 599                                 r = 8 | 4 | 2 | 1;
 600                 }
 601                 break;
 602         case KVM_CAP_PPC_RMA:
 603                 r = 0;
 604                 break;
 605         case KVM_CAP_PPC_HWRNG:
 606                 r = kvmppc_hwrng_present();
 607                 break;
 608         case KVM_CAP_PPC_MMU_RADIX:
 609                 r = !!(hv_enabled && radix_enabled());
 610                 break;
 611         case KVM_CAP_PPC_MMU_HASH_V3:
 612                 r = !!(hv_enabled && cpu_has_feature(CPU_FTR_ARCH_300) &&
 613                        cpu_has_feature(CPU_FTR_HVMODE));
 614                 break;
 615         case KVM_CAP_PPC_NESTED_HV:
 616                 r = !!(hv_enabled && kvmppc_hv_ops->enable_nested &&
 617                        !kvmppc_hv_ops->enable_nested(NULL));
 618                 break;
 619 #endif
 620         case KVM_CAP_SYNC_MMU:
 621 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 622                 r = hv_enabled;
 623 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 624                 r = 1;
 625 #else
 626                 r = 0;
 627 #endif
 628                 break;
 629 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 630         case KVM_CAP_PPC_HTAB_FD:
 631                 r = hv_enabled;
 632                 break;
 633 #endif
 634         case KVM_CAP_NR_VCPUS:
 635                 /*
 636                  * Recommending a number of CPUs is somewhat arbitrary; we
 637                  * return the number of present CPUs for -HV (since a host
 638                  * will have secondary threads "offline"), and for other KVM
 639                  * implementations just count online CPUs.
 640                  */
 641                 if (hv_enabled)
 642                         r = num_present_cpus();
 643                 else
 644                         r = num_online_cpus();
 645                 break;
 646         case KVM_CAP_MAX_VCPUS:
 647                 r = KVM_MAX_VCPUS;
 648                 break;
 649         case KVM_CAP_MAX_VCPU_ID:
 650                 r = KVM_MAX_VCPU_ID;
 651                 break;
 652 #ifdef CONFIG_PPC_BOOK3S_64
 653         case KVM_CAP_PPC_GET_SMMU_INFO:
 654                 r = 1;
 655                 break;
 656         case KVM_CAP_SPAPR_MULTITCE:
 657                 r = 1;
 658                 break;
 659         case KVM_CAP_SPAPR_RESIZE_HPT:
 660                 r = !!hv_enabled;
 661                 break;
 662 #endif
 663 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 664         case KVM_CAP_PPC_FWNMI:
 665                 r = hv_enabled;
 666                 break;
 667 #endif
 668 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 669         case KVM_CAP_PPC_HTM:
 670                 r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
 671                      (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
 672                 break;
 673 #endif
 674         default:
 675                 r = 0;
 676                 break;
 677         }
 678         return r;
 679
 680 }
 681
 682 long kvm_arch_dev_ioctl(struct file *filp,
 683                         unsigned int ioctl, unsigned long arg)
 684 {
 685         return -EINVAL;
 686 }
 687
 688 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 689                            struct kvm_memory_slot *dont)
 690 {
 691         kvmppc_core_free_memslot(kvm, free, dont);
 692 }
 693
 694 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 695                             unsigned long npages)
 696 {
 697         return kvmppc_core_create_memslot(kvm, slot, npages);
 698 }
 699
 700 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 701                                    struct kvm_memory_slot *memslot,
 702                                    const struct kvm_userspace_memory_region *mem,
 703                                    enum kvm_mr_change change)
 704 {
 705         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 706 }
 707
 708 void kvm_arch_commit_memory_region(struct kvm *kvm,
 709                                    const struct kvm_userspace_memory_region *mem,
 710                                    const struct kvm_memory_slot *old,
 711                                    const struct kvm_memory_slot *new,
 712                                    enum kvm_mr_change change)
 713 {
 714         kvmppc_core_commit_memory_region(kvm, mem, old, new, change);
 715 }
 716
 717 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 718                                    struct kvm_memory_slot *slot)
 719 {
 720         kvmppc_core_flush_memslot(kvm, slot);
 721 }
 722
 723 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 724 {
 725         struct kvm_vcpu *vcpu;
 726         vcpu = kvmppc_core_vcpu_create(kvm, id);
 727         if (!IS_ERR(vcpu)) {
 728                 vcpu->arch.wqp = &vcpu->wq;
 729                 kvmppc_create_vcpu_debugfs(vcpu, id);
 730         }
 731         return vcpu;
 732 }
 733
 734 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 735 {
 736 }
 737
 738 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 739 {
 740         /* Make sure we're not using the vcpu anymore */
 741         hrtimer_cancel(&vcpu->arch.dec_timer);
 742
 743         kvmppc_remove_vcpu_debugfs(vcpu);
 744
 745         switch (vcpu->arch.irq_type) {
 746         case KVMPPC_IRQ_MPIC:
 747                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 748                 break;
 749         case KVMPPC_IRQ_XICS:
 750                 if (xics_on_xive())
 751                         kvmppc_xive_cleanup_vcpu(vcpu);
 752                 else
 753                         kvmppc_xics_free_icp(vcpu);
 754                 break;
 755         case KVMPPC_IRQ_XIVE:
 756                 kvmppc_xive_native_cleanup_vcpu(vcpu);
 757                 break;
 758         }
 759
 760         kvmppc_core_vcpu_free(vcpu);
 761 }
 762
 763 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 764 {
 765         kvm_arch_vcpu_free(vcpu);
 766 }
 767
 768 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 769 {
 770         return kvmppc_core_pending_dec(vcpu);
 771 }
 772
 773 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 774 {
 775         struct kvm_vcpu *vcpu;
 776
 777         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 778         kvmppc_decrementer_func(vcpu);
 779
 780         return HRTIMER_NORESTART;
 781 }
 782
 783 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 784 {
 785         int ret;
 786
 787         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 788         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 789         vcpu->arch.dec_expires = get_tb();
 790
 791 #ifdef CONFIG_KVM_EXIT_TIMING
 792         mutex_init(&vcpu->arch.exit_timing_lock);
 793 #endif
 794         ret = kvmppc_subarch_vcpu_init(vcpu);
 795         return ret;
 796 }
 797
 798 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 799 {
 800         kvmppc_mmu_destroy(vcpu);
 801         kvmppc_subarch_vcpu_uninit(vcpu);
 802 }
 803
 804 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 805 {
 806 #ifdef CONFIG_BOOKE
 807         /*
 808          * vrsave (formerly usprg0) isn't used by Linux, but may
 809          * be used by the guest.
 810          *
 811          * On non-booke this is associated with Altivec and
 812          * is handled by code in book3s.c.
 813          */
 814         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 815 #endif
 816         kvmppc_core_vcpu_load(vcpu, cpu);
 817 }
 818
 819 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 820 {
 821         kvmppc_core_vcpu_put(vcpu);
 822 #ifdef CONFIG_BOOKE
 823         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 824 #endif
 825 }
 826
 827 /*
 828  * irq_bypass_add_producer and irq_bypass_del_producer are only
 829  * useful if the architecture supports PCI passthrough.
 830  * irq_bypass_stop and irq_bypass_start are not needed and so
 831  * kvm_ops are not defined for them.
 832  */
 833 bool kvm_arch_has_irq_bypass(void)
 834 {
 835         return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
 836                 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
 837 }
 838
 839 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
 840                                      struct irq_bypass_producer *prod)
 841 {
 842         struct kvm_kernel_irqfd *irqfd =
 843                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 844         struct kvm *kvm = irqfd->kvm;
 845
 846         if (kvm->arch.kvm_ops->irq_bypass_add_producer)
 847                 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
 848
 849         return 0;
 850 }
 851
 852 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
 853                                       struct irq_bypass_producer *prod)
 854 {
 855         struct kvm_kernel_irqfd *irqfd =
 856                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 857         struct kvm *kvm = irqfd->kvm;
 858
 859         if (kvm->arch.kvm_ops->irq_bypass_del_producer)
 860                 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
 861 }
 862
 863 #ifdef CONFIG_VSX
 864 static inline int kvmppc_get_vsr_dword_offset(int index)
 865 {
 866         int offset;
 867
 868         if ((index != 0) && (index != 1))
 869                 return -1;
 870
 871 #ifdef __BIG_ENDIAN
 872         offset =  index;
 873 #else
 874         offset = 1 - index;
 875 #endif
 876
 877         return offset;
 878 }
 879
 880 static inline int kvmppc_get_vsr_word_offset(int index)
 881 {
 882         int offset;
 883
 884         if ((index > 3) || (index < 0))
 885                 return -1;
 886
 887 #ifdef __BIG_ENDIAN
 888         offset = index;
 889 #else
 890         offset = 3 - index;
 891 #endif
 892         return offset;
 893 }
 894
 895 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
 896         u64 gpr)
 897 {
 898         union kvmppc_one_reg val;
 899         int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
 900         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 901
 902         if (offset == -1)
 903                 return;
 904
 905         if (index >= 32) {
 906                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 907                 val.vsxval[offset] = gpr;
 908                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 909         } else {
 910                 VCPU_VSX_FPR(vcpu, index, offset) = gpr;
 911         }
 912 }
 913
 914 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
 915         u64 gpr)
 916 {
 917         union kvmppc_one_reg val;
 918         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 919
 920         if (index >= 32) {
 921                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 922                 val.vsxval[0] = gpr;
 923                 val.vsxval[1] = gpr;
 924                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 925         } else {
 926                 VCPU_VSX_FPR(vcpu, index, 0) = gpr;
 927                 VCPU_VSX_FPR(vcpu, index, 1) = gpr;
 928         }
 929 }
 930
 931 static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
 932         u32 gpr)
 933 {
 934         union kvmppc_one_reg val;
 935         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 936
 937         if (index >= 32) {
 938                 val.vsx32val[0] = gpr;
 939                 val.vsx32val[1] = gpr;
 940                 val.vsx32val[2] = gpr;
 941                 val.vsx32val[3] = gpr;
 942                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 943         } else {
 944                 val.vsx32val[0] = gpr;
 945                 val.vsx32val[1] = gpr;
 946                 VCPU_VSX_FPR(vcpu, index, 0) = val.vsxval[0];
 947                 VCPU_VSX_FPR(vcpu, index, 1) = val.vsxval[0];
 948         }
 949 }
 950
 951 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
 952         u32 gpr32)
 953 {
 954         union kvmppc_one_reg val;
 955         int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
 956         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 957         int dword_offset, word_offset;
 958
 959         if (offset == -1)
 960                 return;
 961
 962         if (index >= 32) {
 963                 val.vval = VCPU_VSX_VR(vcpu, index - 32);
 964                 val.vsx32val[offset] = gpr32;
 965                 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
 966         } else {
 967                 dword_offset = offset / 2;
 968                 word_offset = offset % 2;
 969                 val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
 970                 val.vsx32val[word_offset] = gpr32;
 971                 VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
 972         }
 973 }
 974 #endif /* CONFIG_VSX */
 975
 976 #ifdef CONFIG_ALTIVEC
 977 static inline int kvmppc_get_vmx_offset_generic(struct kvm_vcpu *vcpu,
 978                 int index, int element_size)
 979 {
 980         int offset;
 981         int elts = sizeof(vector128)/element_size;
 982
 983         if ((index < 0) || (index >= elts))
 984                 return -1;
 985
 986         if (kvmppc_need_byteswap(vcpu))
 987                 offset = elts - index - 1;
 988         else
 989                 offset = index;
 990
 991         return offset;
 992 }
 993
 994 static inline int kvmppc_get_vmx_dword_offset(struct kvm_vcpu *vcpu,
 995                 int index)
 996 {
 997         return kvmppc_get_vmx_offset_generic(vcpu, index, 8);
 998 }
 999
1000 static inline int kvmppc_get_vmx_word_offset(struct kvm_vcpu *vcpu,
1001                 int index)
1002 {
1003         return kvmppc_get_vmx_offset_generic(vcpu, index, 4);
1004 }
1005
1006 static inline int kvmppc_get_vmx_hword_offset(struct kvm_vcpu *vcpu,
1007                 int index)
1008 {
1009         return kvmppc_get_vmx_offset_generic(vcpu, index, 2);
1010 }
1011
1012 static inline int kvmppc_get_vmx_byte_offset(struct kvm_vcpu *vcpu,
1013                 int index)
1014 {
1015         return kvmppc_get_vmx_offset_generic(vcpu, index, 1);
1016 }
1017
1018
1019 static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
1020         u64 gpr)
1021 {
1022         union kvmppc_one_reg val;
1023         int offset = kvmppc_get_vmx_dword_offset(vcpu,
1024                         vcpu->arch.mmio_vmx_offset);
1025         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1026
1027         if (offset == -1)
1028                 return;
1029
1030         val.vval = VCPU_VSX_VR(vcpu, index);
1031         val.vsxval[offset] = gpr;
1032         VCPU_VSX_VR(vcpu, index) = val.vval;
1033 }
1034
1035 static inline void kvmppc_set_vmx_word(struct kvm_vcpu *vcpu,
1036         u32 gpr32)
1037 {
1038         union kvmppc_one_reg val;
1039         int offset = kvmppc_get_vmx_word_offset(vcpu,
1040                         vcpu->arch.mmio_vmx_offset);
1041         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1042
1043         if (offset == -1)
1044                 return;
1045
1046         val.vval = VCPU_VSX_VR(vcpu, index);
1047         val.vsx32val[offset] = gpr32;
1048         VCPU_VSX_VR(vcpu, index) = val.vval;
1049 }
1050
1051 static inline void kvmppc_set_vmx_hword(struct kvm_vcpu *vcpu,
1052         u16 gpr16)
1053 {
1054         union kvmppc_one_reg val;
1055         int offset = kvmppc_get_vmx_hword_offset(vcpu,
1056                         vcpu->arch.mmio_vmx_offset);
1057         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1058
1059         if (offset == -1)
1060                 return;
1061
1062         val.vval = VCPU_VSX_VR(vcpu, index);
1063         val.vsx16val[offset] = gpr16;
1064         VCPU_VSX_VR(vcpu, index) = val.vval;
1065 }
1066
1067 static inline void kvmppc_set_vmx_byte(struct kvm_vcpu *vcpu,
1068         u8 gpr8)
1069 {
1070         union kvmppc_one_reg val;
1071         int offset = kvmppc_get_vmx_byte_offset(vcpu,
1072                         vcpu->arch.mmio_vmx_offset);
1073         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1074
1075         if (offset == -1)
1076                 return;
1077
1078         val.vval = VCPU_VSX_VR(vcpu, index);
1079         val.vsx8val[offset] = gpr8;
1080         VCPU_VSX_VR(vcpu, index) = val.vval;
1081 }
1082 #endif /* CONFIG_ALTIVEC */
1083
1084 #ifdef CONFIG_PPC_FPU
1085 static inline u64 sp_to_dp(u32 fprs)
1086 {
1087         u64 fprd;
1088
1089         preempt_disable();
1090         enable_kernel_fp();
1091         asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m" (fprd) : "m" (fprs)
1092              : "fr0");
1093         preempt_enable();
1094         return fprd;
1095 }
1096
1097 static inline u32 dp_to_sp(u64 fprd)
1098 {
1099         u32 fprs;
1100
1101         preempt_disable();
1102         enable_kernel_fp();
1103         asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m" (fprs) : "m" (fprd)
1104              : "fr0");
1105         preempt_enable();
1106         return fprs;
1107 }
1108
1109 #else
1110 #define sp_to_dp(x)     (x)
1111 #define dp_to_sp(x)     (x)
1112 #endif /* CONFIG_PPC_FPU */
1113
1114 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
1115                                       struct kvm_run *run)
1116 {
1117         u64 uninitialized_var(gpr);
1118
1119         if (run->mmio.len > sizeof(gpr)) {
1120                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
1121                 return;
1122         }
1123
1124         if (!vcpu->arch.mmio_host_swabbed) {
1125                 switch (run->mmio.len) {
1126                 case 8: gpr = *(u64 *)run->mmio.data; break;
1127                 case 4: gpr = *(u32 *)run->mmio.data; break;
1128                 case 2: gpr = *(u16 *)run->mmio.data; break;
1129                 case 1: gpr = *(u8 *)run->mmio.data; break;
1130                 }
1131         } else {
1132                 switch (run->mmio.len) {
1133                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
1134                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
1135                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
1136                 case 1: gpr = *(u8 *)run->mmio.data; break;
1137                 }
1138         }
1139
1140         /* conversion between single and double precision */
1141         if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
1142                 gpr = sp_to_dp(gpr);
1143
1144         if (vcpu->arch.mmio_sign_extend) {
1145                 switch (run->mmio.len) {
1146 #ifdef CONFIG_PPC64
1147                 case 4:
1148                         gpr = (s64)(s32)gpr;
1149                         break;
1150 #endif
1151                 case 2:
1152                         gpr = (s64)(s16)gpr;
1153                         break;
1154                 case 1:
1155                         gpr = (s64)(s8)gpr;
1156                         break;
1157                 }
1158         }
1159
1160         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1161         case KVM_MMIO_REG_GPR:
1162                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1163                 break;
1164         case KVM_MMIO_REG_FPR:
1165                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1166                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);
1167
1168                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1169                 break;
1170 #ifdef CONFIG_PPC_BOOK3S
1171         case KVM_MMIO_REG_QPR:
1172                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1173                 break;
1174         case KVM_MMIO_REG_FQPR:
1175                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1176                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1177                 break;
1178 #endif
1179 #ifdef CONFIG_VSX
1180         case KVM_MMIO_REG_VSX:
1181                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1182                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);
1183
1184                 if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
1185                         kvmppc_set_vsr_dword(vcpu, gpr);
1186                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
1187                         kvmppc_set_vsr_word(vcpu, gpr);
1188                 else if (vcpu->arch.mmio_copy_type ==
1189                                 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1190                         kvmppc_set_vsr_dword_dump(vcpu, gpr);
1191                 else if (vcpu->arch.mmio_copy_type ==
1192                                 KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
1193                         kvmppc_set_vsr_word_dump(vcpu, gpr);
1194                 break;
1195 #endif
1196 #ifdef CONFIG_ALTIVEC
1197         case KVM_MMIO_REG_VMX:
1198                 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1199                         vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);
1200
1201                 if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_DWORD)
1202                         kvmppc_set_vmx_dword(vcpu, gpr);
1203                 else if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_WORD)
1204                         kvmppc_set_vmx_word(vcpu, gpr);
1205                 else if (vcpu->arch.mmio_copy_type ==
1206                                 KVMPPC_VMX_COPY_HWORD)
1207                         kvmppc_set_vmx_hword(vcpu, gpr);
1208                 else if (vcpu->arch.mmio_copy_type ==
1209                                 KVMPPC_VMX_COPY_BYTE)
1210                         kvmppc_set_vmx_byte(vcpu, gpr);
1211                 break;
1212 #endif
1213 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1214         case KVM_MMIO_REG_NESTED_GPR:
1215                 if (kvmppc_need_byteswap(vcpu))
1216                         gpr = swab64(gpr);
1217                 kvm_vcpu_write_guest(vcpu, vcpu->arch.nested_io_gpr, &gpr,
1218                                      sizeof(gpr));
1219                 break;
1220 #endif
1221         default:
1222                 BUG();
1223         }
1224 }
1225
1226 static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1227                                 unsigned int rt, unsigned int bytes,
1228                                 int is_default_endian, int sign_extend)
1229 {
1230         int idx, ret;
1231         bool host_swabbed;
1232
1233         /* Pity C doesn't have a logical XOR operator */
1234         if (kvmppc_need_byteswap(vcpu)) {
1235                 host_swabbed = is_default_endian;
1236         } else {
1237                 host_swabbed = !is_default_endian;
1238         }
1239
1240         if (bytes > sizeof(run->mmio.data)) {
1241                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1242                        run->mmio.len);
1243         }
1244
1245         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1246         run->mmio.len = bytes;
1247         run->mmio.is_write = 0;
1248
1249         vcpu->arch.io_gpr = rt;
1250         vcpu->arch.mmio_host_swabbed = host_swabbed;
1251         vcpu->mmio_needed = 1;
1252         vcpu->mmio_is_write = 0;
1253         vcpu->arch.mmio_sign_extend = sign_extend;
1254
1255         idx = srcu_read_lock(&vcpu->kvm->srcu);
1256
1257         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1258                               bytes, &run->mmio.data);
1259
1260         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1261
1262         if (!ret) {
1263                 kvmppc_complete_mmio_load(vcpu, run);
1264                 vcpu->mmio_needed = 0;
1265                 return EMULATE_DONE;
1266         }
1267
1268         return EMULATE_DO_MMIO;
1269 }
1270
1271 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1272                        unsigned int rt, unsigned int bytes,
1273                        int is_default_endian)
1274 {
1275         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0);
1276 }
1277 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1278
1279 /* Same as above, but sign extends */
1280 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
1281                         unsigned int rt, unsigned int bytes,
1282                         int is_default_endian)
1283 {
1284         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
1285 }
1286
1287 #ifdef CONFIG_VSX
1288 int kvmppc_handle_vsx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1289                         unsigned int rt, unsigned int bytes,
1290                         int is_default_endian, int mmio_sign_extend)
1291 {
1292         enum emulation_result emulated = EMULATE_DONE;
1293
1294         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1295         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1296                 return EMULATE_FAIL;
1297
1298         while (vcpu->arch.mmio_vsx_copy_nums) {
1299                 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1300                         is_default_endian, mmio_sign_extend);
1301
1302                 if (emulated != EMULATE_DONE)
1303                         break;
1304
1305                 vcpu->arch.paddr_accessed += run->mmio.len;
1306
1307                 vcpu->arch.mmio_vsx_copy_nums--;
1308                 vcpu->arch.mmio_vsx_offset++;
1309         }
1310         return emulated;
1311 }
1312 #endif /* CONFIG_VSX */
1313
1314 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1315                         u64 val, unsigned int bytes, int is_default_endian)
1316 {
1317         void *data = run->mmio.data;
1318         int idx, ret;
1319         bool host_swabbed;
1320
1321         /* Pity C doesn't have a logical XOR operator */
1322         if (kvmppc_need_byteswap(vcpu)) {
1323                 host_swabbed = is_default_endian;
1324         } else {
1325                 host_swabbed = !is_default_endian;
1326         }
1327
1328         if (bytes > sizeof(run->mmio.data)) {
1329                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1330                        run->mmio.len);
1331         }
1332
1333         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1334         run->mmio.len = bytes;
1335         run->mmio.is_write = 1;
1336         vcpu->mmio_needed = 1;
1337         vcpu->mmio_is_write = 1;
1338
1339         if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1340                 val = dp_to_sp(val);
1341
1342         /* Store the value at the lowest bytes in 'data'. */
1343         if (!host_swabbed) {
1344                 switch (bytes) {
1345                 case 8: *(u64 *)data = val; break;
1346                 case 4: *(u32 *)data = val; break;
1347                 case 2: *(u16 *)data = val; break;
1348                 case 1: *(u8  *)data = val; break;
1349                 }
1350         } else {
1351                 switch (bytes) {
1352                 case 8: *(u64 *)data = swab64(val); break;
1353                 case 4: *(u32 *)data = swab32(val); break;
1354                 case 2: *(u16 *)data = swab16(val); break;
1355                 case 1: *(u8  *)data = val; break;
1356                 }
1357         }
1358
1359         idx = srcu_read_lock(&vcpu->kvm->srcu);
1360
1361         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1362                                bytes, &run->mmio.data);
1363
1364         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1365
1366         if (!ret) {
1367                 vcpu->mmio_needed = 0;
1368                 return EMULATE_DONE;
1369         }
1370
1371         return EMULATE_DO_MMIO;
1372 }
1373 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1374
1375 #ifdef CONFIG_VSX
1376 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1377 {
1378         u32 dword_offset, word_offset;
1379         union kvmppc_one_reg reg;
1380         int vsx_offset = 0;
1381         int copy_type = vcpu->arch.mmio_copy_type;
1382         int result = 0;
1383
1384         switch (copy_type) {
1385         case KVMPPC_VSX_COPY_DWORD:
1386                 vsx_offset =
1387                         kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1388
1389                 if (vsx_offset == -1) {
1390                         result = -1;
1391                         break;
1392                 }
1393
1394                 if (rs < 32) {
1395                         *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
1396                 } else {
1397                         reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1398                         *val = reg.vsxval[vsx_offset];
1399                 }
1400                 break;
1401
1402         case KVMPPC_VSX_COPY_WORD:
1403                 vsx_offset =
1404                         kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1405
1406                 if (vsx_offset == -1) {
1407                         result = -1;
1408                         break;
1409                 }
1410
1411                 if (rs < 32) {
1412                         dword_offset = vsx_offset / 2;
1413                         word_offset = vsx_offset % 2;
1414                         reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
1415                         *val = reg.vsx32val[word_offset];
1416                 } else {
1417                         reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1418                         *val = reg.vsx32val[vsx_offset];
1419                 }
1420                 break;
1421
1422         default:
1423                 result = -1;
1424                 break;
1425         }
1426
1427         return result;
1428 }
1429
1430 int kvmppc_handle_vsx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1431                         int rs, unsigned int bytes, int is_default_endian)
1432 {
1433         u64 val;
1434         enum emulation_result emulated = EMULATE_DONE;
1435
1436         vcpu->arch.io_gpr = rs;
1437
1438         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1439         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1440                 return EMULATE_FAIL;
1441
1442         while (vcpu->arch.mmio_vsx_copy_nums) {
1443                 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1444                         return EMULATE_FAIL;
1445
1446                 emulated = kvmppc_handle_store(run, vcpu,
1447                          val, bytes, is_default_endian);
1448
1449                 if (emulated != EMULATE_DONE)
1450                         break;
1451
1452                 vcpu->arch.paddr_accessed += run->mmio.len;
1453
1454                 vcpu->arch.mmio_vsx_copy_nums--;
1455                 vcpu->arch.mmio_vsx_offset++;
1456         }
1457
1458         return emulated;
1459 }
1460
1461 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu,
1462                         struct kvm_run *run)
1463 {
1464         enum emulation_result emulated = EMULATE_FAIL;
1465         int r;
1466
1467         vcpu->arch.paddr_accessed += run->mmio.len;
1468
1469         if (!vcpu->mmio_is_write) {
1470                 emulated = kvmppc_handle_vsx_load(run, vcpu, vcpu->arch.io_gpr,
1471                          run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1472         } else {
1473                 emulated = kvmppc_handle_vsx_store(run, vcpu,
1474                          vcpu->arch.io_gpr, run->mmio.len, 1);
1475         }
1476
1477         switch (emulated) {
1478         case EMULATE_DO_MMIO:
1479                 run->exit_reason = KVM_EXIT_MMIO;
1480                 r = RESUME_HOST;
1481                 break;
1482         case EMULATE_FAIL:
1483                 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1484                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1485                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1486                 r = RESUME_HOST;
1487                 break;
1488         default:
1489                 r = RESUME_GUEST;
1490                 break;
1491         }
1492         return r;
1493 }
1494 #endif /* CONFIG_VSX */
1495
1496 #ifdef CONFIG_ALTIVEC
1497 int kvmppc_handle_vmx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1498                 unsigned int rt, unsigned int bytes, int is_default_endian)
1499 {
1500         enum emulation_result emulated = EMULATE_DONE;
1501
1502         if (vcpu->arch.mmio_vsx_copy_nums > 2)
1503                 return EMULATE_FAIL;
1504
1505         while (vcpu->arch.mmio_vmx_copy_nums) {
1506                 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1507                                 is_default_endian, 0);
1508
1509                 if (emulated != EMULATE_DONE)
1510                         break;
1511
1512                 vcpu->arch.paddr_accessed += run->mmio.len;
1513                 vcpu->arch.mmio_vmx_copy_nums--;
1514                 vcpu->arch.mmio_vmx_offset++;
1515         }
1516
1517         return emulated;
1518 }
1519
1520 int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
1521 {
1522         union kvmppc_one_reg reg;
1523         int vmx_offset = 0;
1524         int result = 0;
1525
1526         vmx_offset =
1527                 kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1528
1529         if (vmx_offset == -1)
1530                 return -1;
1531
1532         reg.vval = VCPU_VSX_VR(vcpu, index);
1533         *val = reg.vsxval[vmx_offset];
1534
1535         return result;
1536 }
1537
1538 int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
1539 {
1540         union kvmppc_one_reg reg;
1541         int vmx_offset = 0;
1542         int result = 0;
1543
1544         vmx_offset =
1545                 kvmppc_get_vmx_word_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1546
1547         if (vmx_offset == -1)
1548                 return -1;
1549
1550         reg.vval = VCPU_VSX_VR(vcpu, index);
1551         *val = reg.vsx32val[vmx_offset];
1552
1553         return result;
1554 }
1555
1556 int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
1557 {
1558         union kvmppc_one_reg reg;
1559         int vmx_offset = 0;
1560         int result = 0;
1561
1562         vmx_offset =
1563                 kvmppc_get_vmx_hword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1564
1565         if (vmx_offset == -1)
1566                 return -1;
1567
1568         reg.vval = VCPU_VSX_VR(vcpu, index);
1569         *val = reg.vsx16val[vmx_offset];
1570
1571         return result;
1572 }
1573
1574 int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
1575 {
1576         union kvmppc_one_reg reg;
1577         int vmx_offset = 0;
1578         int result = 0;
1579
1580         vmx_offset =
1581                 kvmppc_get_vmx_byte_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1582
1583         if (vmx_offset == -1)
1584                 return -1;
1585
1586         reg.vval = VCPU_VSX_VR(vcpu, index);
1587         *val = reg.vsx8val[vmx_offset];
1588
1589         return result;
1590 }
1591
1592 int kvmppc_handle_vmx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1593                 unsigned int rs, unsigned int bytes, int is_default_endian)
1594 {
1595         u64 val = 0;
1596         unsigned int index = rs & KVM_MMIO_REG_MASK;
1597         enum emulation_result emulated = EMULATE_DONE;
1598
1599         if (vcpu->arch.mmio_vsx_copy_nums > 2)
1600                 return EMULATE_FAIL;
1601
1602         vcpu->arch.io_gpr = rs;
1603
1604         while (vcpu->arch.mmio_vmx_copy_nums) {
1605                 switch (vcpu->arch.mmio_copy_type) {
1606                 case KVMPPC_VMX_COPY_DWORD:
1607                         if (kvmppc_get_vmx_dword(vcpu, index, &val) == -1)
1608                                 return EMULATE_FAIL;
1609
1610                         break;
1611                 case KVMPPC_VMX_COPY_WORD:
1612                         if (kvmppc_get_vmx_word(vcpu, index, &val) == -1)
1613                                 return EMULATE_FAIL;
1614                         break;
1615                 case KVMPPC_VMX_COPY_HWORD:
1616                         if (kvmppc_get_vmx_hword(vcpu, index, &val) == -1)
1617                                 return EMULATE_FAIL;
1618                         break;
1619                 case KVMPPC_VMX_COPY_BYTE:
1620                         if (kvmppc_get_vmx_byte(vcpu, index, &val) == -1)
1621                                 return EMULATE_FAIL;
1622                         break;
1623                 default:
1624                         return EMULATE_FAIL;
1625                 }
1626
1627                 emulated = kvmppc_handle_store(run, vcpu, val, bytes,
1628                                 is_default_endian);
1629                 if (emulated != EMULATE_DONE)
1630                         break;
1631
1632                 vcpu->arch.paddr_accessed += run->mmio.len;
1633                 vcpu->arch.mmio_vmx_copy_nums--;
1634                 vcpu->arch.mmio_vmx_offset++;
1635         }
1636
1637         return emulated;
1638 }
1639
1640 static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu,
1641                 struct kvm_run *run)
1642 {
1643         enum emulation_result emulated = EMULATE_FAIL;
1644         int r;
1645
1646         vcpu->arch.paddr_accessed += run->mmio.len;
1647
1648         if (!vcpu->mmio_is_write) {
1649                 emulated = kvmppc_handle_vmx_load(run, vcpu,
1650                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1651         } else {
1652                 emulated = kvmppc_handle_vmx_store(run, vcpu,
1653                                 vcpu->arch.io_gpr, run->mmio.len, 1);
1654         }
1655
1656         switch (emulated) {
1657         case EMULATE_DO_MMIO:
1658                 run->exit_reason = KVM_EXIT_MMIO;
1659                 r = RESUME_HOST;
1660                 break;
1661         case EMULATE_FAIL:
1662                 pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
1663                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1664                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1665                 r = RESUME_HOST;
1666                 break;
1667         default:
1668                 r = RESUME_GUEST;
1669                 break;
1670         }
1671         return r;
1672 }
1673 #endif /* CONFIG_ALTIVEC */
1674
1675 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1676 {
1677         int r = 0;
1678         union kvmppc_one_reg val;
1679         int size;
1680
1681         size = one_reg_size(reg->id);
1682         if (size > sizeof(val))
1683                 return -EINVAL;
1684
1685         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1686         if (r == -EINVAL) {
1687                 r = 0;
1688                 switch (reg->id) {
1689 #ifdef CONFIG_ALTIVEC
1690                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1691                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1692                                 r = -ENXIO;
1693                                 break;
1694                         }
1695                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1696                         break;
1697                 case KVM_REG_PPC_VSCR:
1698                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1699                                 r = -ENXIO;
1700                                 break;
1701                         }
1702                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1703                         break;
1704                 case KVM_REG_PPC_VRSAVE:
1705                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
1706                         break;
1707 #endif /* CONFIG_ALTIVEC */
1708                 default:
1709                         r = -EINVAL;
1710                         break;
1711                 }
1712         }
1713
1714         if (r)
1715                 return r;
1716
1717         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1718                 r = -EFAULT;
1719
1720         return r;
1721 }
1722
1723 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1724 {
1725         int r;
1726         union kvmppc_one_reg val;
1727         int size;
1728
1729         size = one_reg_size(reg->id);
1730         if (size > sizeof(val))
1731                 return -EINVAL;
1732
1733         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1734                 return -EFAULT;
1735
1736         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1737         if (r == -EINVAL) {
1738                 r = 0;
1739                 switch (reg->id) {
1740 #ifdef CONFIG_ALTIVEC
1741                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1742                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1743                                 r = -ENXIO;
1744                                 break;
1745                         }
1746                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1747                         break;
1748                 case KVM_REG_PPC_VSCR:
1749                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1750                                 r = -ENXIO;
1751                                 break;
1752                         }
1753                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1754                         break;
1755                 case KVM_REG_PPC_VRSAVE:
1756                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1757                                 r = -ENXIO;
1758                                 break;
1759                         }
1760                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
1761                         break;
1762 #endif /* CONFIG_ALTIVEC */
1763                 default:
1764                         r = -EINVAL;
1765                         break;
1766                 }
1767         }
1768
1769         return r;
1770 }
1771
1772 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
1773 {
1774         int r;
1775
1776         vcpu_load(vcpu);
1777
1778         if (vcpu->mmio_needed) {
1779                 vcpu->mmio_needed = 0;
1780                 if (!vcpu->mmio_is_write)
1781                         kvmppc_complete_mmio_load(vcpu, run);
1782 #ifdef CONFIG_VSX
1783                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1784                         vcpu->arch.mmio_vsx_copy_nums--;
1785                         vcpu->arch.mmio_vsx_offset++;
1786                 }
1787
1788                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1789                         r = kvmppc_emulate_mmio_vsx_loadstore(vcpu, run);
1790                         if (r == RESUME_HOST) {
1791                                 vcpu->mmio_needed = 1;
1792                                 goto out;
1793                         }
1794                 }
1795 #endif
1796 #ifdef CONFIG_ALTIVEC
1797                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1798                         vcpu->arch.mmio_vmx_copy_nums--;
1799                         vcpu->arch.mmio_vmx_offset++;
1800                 }
1801
1802                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1803                         r = kvmppc_emulate_mmio_vmx_loadstore(vcpu, run);
1804                         if (r == RESUME_HOST) {
1805                                 vcpu->mmio_needed = 1;
1806                                 goto out;
1807                         }
1808                 }
1809 #endif
1810         } else if (vcpu->arch.osi_needed) {
1811                 u64 *gprs = run->osi.gprs;
1812                 int i;
1813
1814                 for (i = 0; i < 32; i++)
1815                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1816                 vcpu->arch.osi_needed = 0;
1817         } else if (vcpu->arch.hcall_needed) {
1818                 int i;
1819
1820                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1821                 for (i = 0; i < 9; ++i)
1822                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1823                 vcpu->arch.hcall_needed = 0;
1824 #ifdef CONFIG_BOOKE
1825         } else if (vcpu->arch.epr_needed) {
1826                 kvmppc_set_epr(vcpu, run->epr.epr);
1827                 vcpu->arch.epr_needed = 0;
1828 #endif
1829         }
1830
1831         kvm_sigset_activate(vcpu);
1832
1833         if (run->immediate_exit)
1834                 r = -EINTR;
1835         else
1836                 r = kvmppc_vcpu_run(run, vcpu);
1837
1838         kvm_sigset_deactivate(vcpu);
1839
1840 #ifdef CONFIG_ALTIVEC
1841 out:
1842 #endif
1843         vcpu_put(vcpu);
1844         return r;
1845 }
1846
1847 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1848 {
1849         if (irq->irq == KVM_INTERRUPT_UNSET) {
1850                 kvmppc_core_dequeue_external(vcpu);
1851                 return 0;
1852         }
1853
1854         kvmppc_core_queue_external(vcpu, irq);
1855
1856         kvm_vcpu_kick(vcpu);
1857
1858         return 0;
1859 }
1860
1861 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1862                                      struct kvm_enable_cap *cap)
1863 {
1864         int r;
1865
1866         if (cap->flags)
1867                 return -EINVAL;
1868
1869         switch (cap->cap) {
1870         case KVM_CAP_PPC_OSI:
1871                 r = 0;
1872                 vcpu->arch.osi_enabled = true;
1873                 break;
1874         case KVM_CAP_PPC_PAPR:
1875                 r = 0;
1876                 vcpu->arch.papr_enabled = true;
1877                 break;
1878         case KVM_CAP_PPC_EPR:
1879                 r = 0;
1880                 if (cap->args[0])
1881                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1882                 else
1883                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1884                 break;
1885 #ifdef CONFIG_BOOKE
1886         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1887                 r = 0;
1888                 vcpu->arch.watchdog_enabled = true;
1889                 break;
1890 #endif
1891 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1892         case KVM_CAP_SW_TLB: {
1893                 struct kvm_config_tlb cfg;
1894                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1895
1896                 r = -EFAULT;
1897                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1898                         break;
1899
1900                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1901                 break;
1902         }
1903 #endif
1904 #ifdef CONFIG_KVM_MPIC
1905         case KVM_CAP_IRQ_MPIC: {
1906                 struct fd f;
1907                 struct kvm_device *dev;
1908
1909                 r = -EBADF;
1910                 f = fdget(cap->args[0]);
1911                 if (!f.file)
1912                         break;
1913
1914                 r = -EPERM;
1915                 dev = kvm_device_from_filp(f.file);
1916                 if (dev)
1917                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1918
1919                 fdput(f);
1920                 break;
1921         }
1922 #endif
1923 #ifdef CONFIG_KVM_XICS
1924         case KVM_CAP_IRQ_XICS: {
1925                 struct fd f;
1926                 struct kvm_device *dev;
1927
1928                 r = -EBADF;
1929                 f = fdget(cap->args[0]);
1930                 if (!f.file)
1931                         break;
1932
1933                 r = -EPERM;
1934                 dev = kvm_device_from_filp(f.file);
1935                 if (dev) {
1936                         if (xics_on_xive())
1937                                 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1938                         else
1939                                 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1940                 }
1941
1942                 fdput(f);
1943                 break;
1944         }
1945 #endif /* CONFIG_KVM_XICS */
1946 #ifdef CONFIG_KVM_XIVE
1947         case KVM_CAP_PPC_IRQ_XIVE: {
1948                 struct fd f;
1949                 struct kvm_device *dev;
1950
1951                 r = -EBADF;
1952                 f = fdget(cap->args[0]);
1953                 if (!f.file)
1954                         break;
1955
1956                 r = -ENXIO;
1957                 if (!xive_enabled())
1958                         break;
1959
1960                 r = -EPERM;
1961                 dev = kvm_device_from_filp(f.file);
1962                 if (dev)
1963                         r = kvmppc_xive_native_connect_vcpu(dev, vcpu,
1964                                                             cap->args[1]);
1965
1966                 fdput(f);
1967                 break;
1968         }
1969 #endif /* CONFIG_KVM_XIVE */
1970 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1971         case KVM_CAP_PPC_FWNMI:
1972                 r = -EINVAL;
1973                 if (!is_kvmppc_hv_enabled(vcpu->kvm))
1974                         break;
1975                 r = 0;
1976                 vcpu->kvm->arch.fwnmi_enabled = true;
1977                 break;
1978 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
1979         default:
1980                 r = -EINVAL;
1981                 break;
1982         }
1983
1984         if (!r)
1985                 r = kvmppc_sanity_check(vcpu);
1986
1987         return r;
1988 }
1989
1990 bool kvm_arch_intc_initialized(struct kvm *kvm)
1991 {
1992 #ifdef CONFIG_KVM_MPIC
1993         if (kvm->arch.mpic)
1994                 return true;
1995 #endif
1996 #ifdef CONFIG_KVM_XICS
1997         if (kvm->arch.xics || kvm->arch.xive)
1998                 return true;
1999 #endif
2000         return false;
2001 }
2002
2003 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
2004                                     struct kvm_mp_state *mp_state)
2005 {
2006         return -EINVAL;
2007 }
2008
2009 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
2010                                     struct kvm_mp_state *mp_state)
2011 {
2012         return -EINVAL;
2013 }
2014
2015 long kvm_arch_vcpu_async_ioctl(struct file *filp,
2016                                unsigned int ioctl, unsigned long arg)
2017 {
2018         struct kvm_vcpu *vcpu = filp->private_data;
2019         void __user *argp = (void __user *)arg;
2020
2021         if (ioctl == KVM_INTERRUPT) {
2022                 struct kvm_interrupt irq;
2023                 if (copy_from_user(&irq, argp, sizeof(irq)))
2024                         return -EFAULT;
2025                 return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2026         }
2027         return -ENOIOCTLCMD;
2028 }
2029
2030 long kvm_arch_vcpu_ioctl(struct file *filp,
2031                          unsigned int ioctl, unsigned long arg)
2032 {
2033         struct kvm_vcpu *vcpu = filp->private_data;
2034         void __user *argp = (void __user *)arg;
2035         long r;
2036
2037         switch (ioctl) {
2038         case KVM_ENABLE_CAP:
2039         {
2040                 struct kvm_enable_cap cap;
2041                 r = -EFAULT;
2042                 vcpu_load(vcpu);
2043                 if (copy_from_user(&cap, argp, sizeof(cap)))
2044                         goto out;
2045                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
2046                 vcpu_put(vcpu);
2047                 break;
2048         }
2049
2050         case KVM_SET_ONE_REG:
2051         case KVM_GET_ONE_REG:
2052         {
2053                 struct kvm_one_reg reg;
2054                 r = -EFAULT;
2055                 if (copy_from_user(&reg, argp, sizeof(reg)))
2056                         goto out;
2057                 if (ioctl == KVM_SET_ONE_REG)
2058                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
2059                 else
2060                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
2061                 break;
2062         }
2063
2064 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
2065         case KVM_DIRTY_TLB: {
2066                 struct kvm_dirty_tlb dirty;
2067                 r = -EFAULT;
2068                 vcpu_load(vcpu);
2069                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
2070                         goto out;
2071                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
2072                 vcpu_put(vcpu);
2073                 break;
2074         }
2075 #endif
2076         default:
2077                 r = -EINVAL;
2078         }
2079
2080 out:
2081         return r;
2082 }
2083
2084 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2085 {
2086         return VM_FAULT_SIGBUS;
2087 }
2088
2089 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
2090 {
2091         u32 inst_nop = 0x60000000;
2092 #ifdef CONFIG_KVM_BOOKE_HV
2093         u32 inst_sc1 = 0x44000022;
2094         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
2095         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
2096         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
2097         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2098 #else
2099         u32 inst_lis = 0x3c000000;
2100         u32 inst_ori = 0x60000000;
2101         u32 inst_sc = 0x44000002;
2102         u32 inst_imm_mask = 0xffff;
2103
2104         /*
2105          * The hypercall to get into KVM from within guest context is as
2106          * follows:
2107          *
2108          *    lis r0, r0, KVM_SC_MAGIC_R0@h
2109          *    ori r0, KVM_SC_MAGIC_R0@l
2110          *    sc
2111          *    nop
2112          */
2113         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
2114         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
2115         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
2116         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2117 #endif
2118
2119         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
2120
2121         return 0;
2122 }
2123
2124 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
2125                           bool line_status)
2126 {
2127         if (!irqchip_in_kernel(kvm))
2128                 return -ENXIO;
2129
2130         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
2131                                         irq_event->irq, irq_event->level,
2132                                         line_status);
2133         return 0;
2134 }
2135
2136
2137 int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
2138                             struct kvm_enable_cap *cap)
2139 {
2140         int r;
2141
2142         if (cap->flags)
2143                 return -EINVAL;
2144
2145         switch (cap->cap) {
2146 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
2147         case KVM_CAP_PPC_ENABLE_HCALL: {
2148                 unsigned long hcall = cap->args[0];
2149
2150                 r = -EINVAL;
2151                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
2152                     cap->args[1] > 1)
2153                         break;
2154                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
2155                         break;
2156                 if (cap->args[1])
2157                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
2158                 else
2159                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
2160                 r = 0;
2161                 break;
2162         }
2163         case KVM_CAP_PPC_SMT: {
2164                 unsigned long mode = cap->args[0];
2165                 unsigned long flags = cap->args[1];
2166
2167                 r = -EINVAL;
2168                 if (kvm->arch.kvm_ops->set_smt_mode)
2169                         r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
2170                 break;
2171         }
2172
2173         case KVM_CAP_PPC_NESTED_HV:
2174                 r = -EINVAL;
2175                 if (!is_kvmppc_hv_enabled(kvm) ||
2176                     !kvm->arch.kvm_ops->enable_nested)
2177                         break;
2178                 r = kvm->arch.kvm_ops->enable_nested(kvm);
2179                 break;
2180 #endif
2181         default:
2182                 r = -EINVAL;
2183                 break;
2184         }
2185
2186         return r;
2187 }
2188
2189 #ifdef CONFIG_PPC_BOOK3S_64
2190 /*
2191  * These functions check whether the underlying hardware is safe
2192  * against attacks based on observing the effects of speculatively
2193  * executed instructions, and whether it supplies instructions for
2194  * use in workarounds.  The information comes from firmware, either
2195  * via the device tree on powernv platforms or from an hcall on
2196  * pseries platforms.
2197  */
2198 #ifdef CONFIG_PPC_PSERIES
2199 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2200 {
2201         struct h_cpu_char_result c;
2202         unsigned long rc;
2203
2204         if (!machine_is(pseries))
2205                 return -ENOTTY;
2206
2207         rc = plpar_get_cpu_characteristics(&c);
2208         if (rc == H_SUCCESS) {
2209                 cp->character = c.character;
2210                 cp->behaviour = c.behaviour;
2211                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2212                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2213                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2214                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2215                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2216                         KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
2217                         KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
2218                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2219                         KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2220                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2221                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2222                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2223                         KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2224         }
2225         return 0;
2226 }
2227 #else
2228 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2229 {
2230         return -ENOTTY;
2231 }
2232 #endif
2233
2234 static inline bool have_fw_feat(struct device_node *fw_features,
2235                                 const char *state, const char *name)
2236 {
2237         struct device_node *np;
2238         bool r = false;
2239
2240         np = of_get_child_by_name(fw_features, name);
2241         if (np) {
2242                 r = of_property_read_bool(np, state);
2243                 of_node_put(np);
2244         }
2245         return r;
2246 }
2247
2248 static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2249 {
2250         struct device_node *np, *fw_features;
2251         int r;
2252
2253         memset(cp, 0, sizeof(*cp));
2254         r = pseries_get_cpu_char(cp);
2255         if (r != -ENOTTY)
2256                 return r;
2257
2258         np = of_find_node_by_name(NULL, "ibm,opal");
2259         if (np) {
2260                 fw_features = of_get_child_by_name(np, "fw-features");
2261                 of_node_put(np);
2262                 if (!fw_features)
2263                         return 0;
2264                 if (have_fw_feat(fw_features, "enabled",
2265                                  "inst-spec-barrier-ori31,31,0"))
2266                         cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31;
2267                 if (have_fw_feat(fw_features, "enabled",
2268                                  "fw-bcctrl-serialized"))
2269                         cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED;
2270                 if (have_fw_feat(fw_features, "enabled",
2271                                  "inst-l1d-flush-ori30,30,0"))
2272                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30;
2273                 if (have_fw_feat(fw_features, "enabled",
2274                                  "inst-l1d-flush-trig2"))
2275                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2;
2276                 if (have_fw_feat(fw_features, "enabled",
2277                                  "fw-l1d-thread-split"))
2278                         cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV;
2279                 if (have_fw_feat(fw_features, "enabled",
2280                                  "fw-count-cache-disabled"))
2281                         cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2282                 if (have_fw_feat(fw_features, "enabled",
2283                                  "fw-count-cache-flush-bcctr2,0,0"))
2284                         cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2285                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2286                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2287                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2288                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2289                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2290                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2291                         KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2292
2293                 if (have_fw_feat(fw_features, "enabled",
2294                                  "speculation-policy-favor-security"))
2295                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY;
2296                 if (!have_fw_feat(fw_features, "disabled",
2297                                   "needs-l1d-flush-msr-pr-0-to-1"))
2298                         cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR;
2299                 if (!have_fw_feat(fw_features, "disabled",
2300                                   "needs-spec-barrier-for-bound-checks"))
2301                         cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2302                 if (have_fw_feat(fw_features, "enabled",
2303                                  "needs-count-cache-flush-on-context-switch"))
2304                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2305                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2306                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2307                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2308                         KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2309
2310                 of_node_put(fw_features);
2311         }
2312
2313         return 0;
2314 }
2315 #endif
2316
2317 long kvm_arch_vm_ioctl(struct file *filp,
2318                        unsigned int ioctl, unsigned long arg)
2319 {
2320         struct kvm *kvm __maybe_unused = filp->private_data;
2321         void __user *argp = (void __user *)arg;
2322         long r;
2323
2324         switch (ioctl) {
2325         case KVM_PPC_GET_PVINFO: {
2326                 struct kvm_ppc_pvinfo pvinfo;
2327                 memset(&pvinfo, 0, sizeof(pvinfo));
2328                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
2329                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
2330                         r = -EFAULT;
2331                         goto out;
2332                 }
2333
2334                 break;
2335         }
2336 #ifdef CONFIG_SPAPR_TCE_IOMMU
2337         case KVM_CREATE_SPAPR_TCE_64: {
2338                 struct kvm_create_spapr_tce_64 create_tce_64;
2339
2340                 r = -EFAULT;
2341                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
2342                         goto out;
2343                 if (create_tce_64.flags) {
2344                         r = -EINVAL;
2345                         goto out;
2346                 }
2347                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2348                 goto out;
2349         }
2350         case KVM_CREATE_SPAPR_TCE: {
2351                 struct kvm_create_spapr_tce create_tce;
2352                 struct kvm_create_spapr_tce_64 create_tce_64;
2353
2354                 r = -EFAULT;
2355                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
2356                         goto out;
2357
2358                 create_tce_64.liobn = create_tce.liobn;
2359                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
2360                 create_tce_64.offset = 0;
2361                 create_tce_64.size = create_tce.window_size >>
2362                                 IOMMU_PAGE_SHIFT_4K;
2363                 create_tce_64.flags = 0;
2364                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2365                 goto out;
2366         }
2367 #endif
2368 #ifdef CONFIG_PPC_BOOK3S_64
2369         case KVM_PPC_GET_SMMU_INFO: {
2370                 struct kvm_ppc_smmu_info info;
2371                 struct kvm *kvm = filp->private_data;
2372
2373                 memset(&info, 0, sizeof(info));
2374                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2375                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2376                         r = -EFAULT;
2377                 break;
2378         }
2379         case KVM_PPC_RTAS_DEFINE_TOKEN: {
2380                 struct kvm *kvm = filp->private_data;
2381
2382                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
2383                 break;
2384         }
2385         case KVM_PPC_CONFIGURE_V3_MMU: {
2386                 struct kvm *kvm = filp->private_data;
2387                 struct kvm_ppc_mmuv3_cfg cfg;
2388
2389                 r = -EINVAL;
2390                 if (!kvm->arch.kvm_ops->configure_mmu)
2391                         goto out;
2392                 r = -EFAULT;
2393                 if (copy_from_user(&cfg, argp, sizeof(cfg)))
2394                         goto out;
2395                 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
2396                 break;
2397         }
2398         case KVM_PPC_GET_RMMU_INFO: {
2399                 struct kvm *kvm = filp->private_data;
2400                 struct kvm_ppc_rmmu_info info;
2401
2402                 r = -EINVAL;
2403                 if (!kvm->arch.kvm_ops->get_rmmu_info)
2404                         goto out;
2405                 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
2406                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2407                         r = -EFAULT;
2408                 break;
2409         }
2410         case KVM_PPC_GET_CPU_CHAR: {
2411                 struct kvm_ppc_cpu_char cpuchar;
2412
2413                 r = kvmppc_get_cpu_char(&cpuchar);
2414                 if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar)))
2415                         r = -EFAULT;
2416                 break;
2417         }
2418         default: {
2419                 struct kvm *kvm = filp->private_data;
2420                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
2421         }
2422 #else /* CONFIG_PPC_BOOK3S_64 */
2423         default:
2424                 r = -ENOTTY;
2425 #endif
2426         }
2427 out:
2428         return r;
2429 }
2430
2431 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
2432 static unsigned long nr_lpids;
2433
2434 long kvmppc_alloc_lpid(void)
2435 {
2436         long lpid;
2437
2438         do {
2439                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
2440                 if (lpid >= nr_lpids) {
2441                         pr_err("%s: No LPIDs free\n", __func__);
2442                         return -ENOMEM;
2443                 }
2444         } while (test_and_set_bit(lpid, lpid_inuse));
2445
2446         return lpid;
2447 }
2448 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2449
2450 void kvmppc_claim_lpid(long lpid)
2451 {
2452         set_bit(lpid, lpid_inuse);
2453 }
2454 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
2455
2456 void kvmppc_free_lpid(long lpid)
2457 {
2458         clear_bit(lpid, lpid_inuse);
2459 }
2460 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2461
2462 void kvmppc_init_lpid(unsigned long nr_lpids_param)
2463 {
2464         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
2465         memset(lpid_inuse, 0, sizeof(lpid_inuse));
2466 }
2467 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2468
2469 int kvm_arch_init(void *opaque)
2470 {
2471         return 0;
2472 }
2473
2474 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);