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/sched/signal.h>
  27 #include <linux/fs.h>
  28 #include <linux/slab.h>
  29 #include <linux/file.h>
  30 #include <linux/module.h>
  31 #include <linux/irqbypass.h>
  32 #include <linux/kvm_irqfd.h>
  33 #include <asm/cputable.h>
  34 #include <linux/uaccess.h>
  35 #include <asm/kvm_ppc.h>
  36 #include <asm/tlbflush.h>
  37 #include <asm/cputhreads.h>
  38 #include <asm/irqflags.h>
  39 #include <asm/iommu.h>
  40 #include <asm/switch_to.h>
  41 #include <asm/xive.h>
  42
  43 #include "timing.h"
  44 #include "irq.h"
  45 #include "../mm/mmu_decl.h"
  46
  47 #define CREATE_TRACE_POINTS
  48 #include "trace.h"
  49
  50 struct kvmppc_ops *kvmppc_hv_ops;
  51 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
  52 struct kvmppc_ops *kvmppc_pr_ops;
  53 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
  54
  55
  56 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  57 {
  58         return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
  59 }
  60
  61 bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu)
  62 {
  63         return kvm_arch_vcpu_runnable(vcpu);
  64 }
  65
  66 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
  67 {
  68         return false;
  69 }
  70
  71 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  72 {
  73         return 1;
  74 }
  75
  76 /*
  77  * Common checks before entering the guest world.  Call with interrupts
  78  * disabled.
  79  *
  80  * returns:
  81  *
  82  * == 1 if we're ready to go into guest state
  83  * <= 0 if we need to go back to the host with return value
  84  */
  85 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
  86 {
  87         int r;
  88
  89         WARN_ON(irqs_disabled());
  90         hard_irq_disable();
  91
  92         while (true) {
  93                 if (need_resched()) {
  94                         local_irq_enable();
  95                         cond_resched();
  96                         hard_irq_disable();
  97                         continue;
  98                 }
  99
 100                 if (signal_pending(current)) {
 101                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 102                         vcpu->run->exit_reason = KVM_EXIT_INTR;
 103                         r = -EINTR;
 104                         break;
 105                 }
 106
 107                 vcpu->mode = IN_GUEST_MODE;
 108
 109                 /*
 110                  * Reading vcpu->requests must happen after setting vcpu->mode,
 111                  * so we don't miss a request because the requester sees
 112                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
 113                  * before next entering the guest (and thus doesn't IPI).
 114                  * This also orders the write to mode from any reads
 115                  * to the page tables done while the VCPU is running.
 116                  * Please see the comment in kvm_flush_remote_tlbs.
 117                  */
 118                 smp_mb();
 119
 120                 if (kvm_request_pending(vcpu)) {
 121                         /* Make sure we process requests preemptable */
 122                         local_irq_enable();
 123                         trace_kvm_check_requests(vcpu);
 124                         r = kvmppc_core_check_requests(vcpu);
 125                         hard_irq_disable();
 126                         if (r > 0)
 127                                 continue;
 128                         break;
 129                 }
 130
 131                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 132                         /* interrupts got enabled in between, so we
 133                            are back at square 1 */
 134                         continue;
 135                 }
 136
 137                 guest_enter_irqoff();
 138                 return 1;
 139         }
 140
 141         /* return to host */
 142         local_irq_enable();
 143         return r;
 144 }
 145 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
 146
 147 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 148 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
 149 {
 150         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
 151         int i;
 152
 153         shared->sprg0 = swab64(shared->sprg0);
 154         shared->sprg1 = swab64(shared->sprg1);
 155         shared->sprg2 = swab64(shared->sprg2);
 156         shared->sprg3 = swab64(shared->sprg3);
 157         shared->srr0 = swab64(shared->srr0);
 158         shared->srr1 = swab64(shared->srr1);
 159         shared->dar = swab64(shared->dar);
 160         shared->msr = swab64(shared->msr);
 161         shared->dsisr = swab32(shared->dsisr);
 162         shared->int_pending = swab32(shared->int_pending);
 163         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
 164                 shared->sr[i] = swab32(shared->sr[i]);
 165 }
 166 #endif
 167
 168 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
 169 {
 170         int nr = kvmppc_get_gpr(vcpu, 11);
 171         int r;
 172         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
 173         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
 174         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
 175         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
 176         unsigned long r2 = 0;
 177
 178         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 179                 /* 32 bit mode */
 180                 param1 &= 0xffffffff;
 181                 param2 &= 0xffffffff;
 182                 param3 &= 0xffffffff;
 183                 param4 &= 0xffffffff;
 184         }
 185
 186         switch (nr) {
 187         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
 188         {
 189 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 190                 /* Book3S can be little endian, find it out here */
 191                 int shared_big_endian = true;
 192                 if (vcpu->arch.intr_msr & MSR_LE)
 193                         shared_big_endian = false;
 194                 if (shared_big_endian != vcpu->arch.shared_big_endian)
 195                         kvmppc_swab_shared(vcpu);
 196                 vcpu->arch.shared_big_endian = shared_big_endian;
 197 #endif
 198
 199                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
 200                         /*
 201                          * Older versions of the Linux magic page code had
 202                          * a bug where they would map their trampoline code
 203                          * NX. If that's the case, remove !PR NX capability.
 204                          */
 205                         vcpu->arch.disable_kernel_nx = true;
 206                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 207                 }
 208
 209                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
 210                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
 211
 212 #ifdef CONFIG_PPC_64K_PAGES
 213                 /*
 214                  * Make sure our 4k magic page is in the same window of a 64k
 215                  * page within the guest and within the host's page.
 216                  */
 217                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
 218                     ((ulong)vcpu->arch.shared & 0xf000)) {
 219                         void *old_shared = vcpu->arch.shared;
 220                         ulong shared = (ulong)vcpu->arch.shared;
 221                         void *new_shared;
 222
 223                         shared &= PAGE_MASK;
 224                         shared |= vcpu->arch.magic_page_pa & 0xf000;
 225                         new_shared = (void*)shared;
 226                         memcpy(new_shared, old_shared, 0x1000);
 227                         vcpu->arch.shared = new_shared;
 228                 }
 229 #endif
 230
 231                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
 232
 233                 r = EV_SUCCESS;
 234                 break;
 235         }
 236         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
 237                 r = EV_SUCCESS;
 238 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
 239                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
 240 #endif
 241
 242                 /* Second return value is in r4 */
 243                 break;
 244         case EV_HCALL_TOKEN(EV_IDLE):
 245                 r = EV_SUCCESS;
 246                 kvm_vcpu_block(vcpu);
 247                 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
 248                 break;
 249         default:
 250                 r = EV_UNIMPLEMENTED;
 251                 break;
 252         }
 253
 254         kvmppc_set_gpr(vcpu, 4, r2);
 255
 256         return r;
 257 }
 258 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
 259
 260 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 261 {
 262         int r = false;
 263
 264         /* We have to know what CPU to virtualize */
 265         if (!vcpu->arch.pvr)
 266                 goto out;
 267
 268         /* PAPR only works with book3s_64 */
 269         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 270                 goto out;
 271
 272         /* HV KVM can only do PAPR mode for now */
 273         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
 274                 goto out;
 275
 276 #ifdef CONFIG_KVM_BOOKE_HV
 277         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 278                 goto out;
 279 #endif
 280
 281         r = true;
 282
 283 out:
 284         vcpu->arch.sane = r;
 285         return r ? 0 : -EINVAL;
 286 }
 287 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
 288
 289 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 290 {
 291         enum emulation_result er;
 292         int r;
 293
 294         er = kvmppc_emulate_loadstore(vcpu);
 295         switch (er) {
 296         case EMULATE_DONE:
 297                 /* Future optimization: only reload non-volatiles if they were
 298                  * actually modified. */
 299                 r = RESUME_GUEST_NV;
 300                 break;
 301         case EMULATE_AGAIN:
 302                 r = RESUME_GUEST;
 303                 break;
 304         case EMULATE_DO_MMIO:
 305                 run->exit_reason = KVM_EXIT_MMIO;
 306                 /* We must reload nonvolatiles because "update" load/store
 307                  * instructions modify register state. */
 308                 /* Future optimization: only reload non-volatiles if they were
 309                  * actually modified. */
 310                 r = RESUME_HOST_NV;
 311                 break;
 312         case EMULATE_FAIL:
 313         {
 314                 u32 last_inst;
 315
 316                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
 317                 /* XXX Deliver Program interrupt to guest. */
 318                 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
 319                 r = RESUME_HOST;
 320                 break;
 321         }
 322         default:
 323                 WARN_ON(1);
 324                 r = RESUME_GUEST;
 325         }
 326
 327         return r;
 328 }
 329 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
 330
 331 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 332               bool data)
 333 {
 334         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 335         struct kvmppc_pte pte;
 336         int r;
 337
 338         vcpu->stat.st++;
 339
 340         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 341                          XLATE_WRITE, &pte);
 342         if (r < 0)
 343                 return r;
 344
 345         *eaddr = pte.raddr;
 346
 347         if (!pte.may_write)
 348                 return -EPERM;
 349
 350         /* Magic page override */
 351         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 352             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 353             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 354                 void *magic = vcpu->arch.shared;
 355                 magic += pte.eaddr & 0xfff;
 356                 memcpy(magic, ptr, size);
 357                 return EMULATE_DONE;
 358         }
 359
 360         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 361                 return EMULATE_DO_MMIO;
 362
 363         return EMULATE_DONE;
 364 }
 365 EXPORT_SYMBOL_GPL(kvmppc_st);
 366
 367 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 368                       bool data)
 369 {
 370         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 371         struct kvmppc_pte pte;
 372         int rc;
 373
 374         vcpu->stat.ld++;
 375
 376         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 377                           XLATE_READ, &pte);
 378         if (rc)
 379                 return rc;
 380
 381         *eaddr = pte.raddr;
 382
 383         if (!pte.may_read)
 384                 return -EPERM;
 385
 386         if (!data && !pte.may_execute)
 387                 return -ENOEXEC;
 388
 389         /* Magic page override */
 390         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 391             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 392             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 393                 void *magic = vcpu->arch.shared;
 394                 magic += pte.eaddr & 0xfff;
 395                 memcpy(ptr, magic, size);
 396                 return EMULATE_DONE;
 397         }
 398
 399         if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
 400                 return EMULATE_DO_MMIO;
 401
 402         return EMULATE_DONE;
 403 }
 404 EXPORT_SYMBOL_GPL(kvmppc_ld);
 405
 406 int kvm_arch_hardware_enable(void)
 407 {
 408         return 0;
 409 }
 410
 411 int kvm_arch_hardware_setup(void)
 412 {
 413         return 0;
 414 }
 415
 416 void kvm_arch_check_processor_compat(void *rtn)
 417 {
 418         *(int *)rtn = kvmppc_core_check_processor_compat();
 419 }
 420
 421 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 422 {
 423         struct kvmppc_ops *kvm_ops = NULL;
 424         /*
 425          * if we have both HV and PR enabled, default is HV
 426          */
 427         if (type == 0) {
 428                 if (kvmppc_hv_ops)
 429                         kvm_ops = kvmppc_hv_ops;
 430                 else
 431                         kvm_ops = kvmppc_pr_ops;
 432                 if (!kvm_ops)
 433                         goto err_out;
 434         } else  if (type == KVM_VM_PPC_HV) {
 435                 if (!kvmppc_hv_ops)
 436                         goto err_out;
 437                 kvm_ops = kvmppc_hv_ops;
 438         } else if (type == KVM_VM_PPC_PR) {
 439                 if (!kvmppc_pr_ops)
 440                         goto err_out;
 441                 kvm_ops = kvmppc_pr_ops;
 442         } else
 443                 goto err_out;
 444
 445         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
 446                 return -ENOENT;
 447
 448         kvm->arch.kvm_ops = kvm_ops;
 449         return kvmppc_core_init_vm(kvm);
 450 err_out:
 451         return -EINVAL;
 452 }
 453
 454 bool kvm_arch_has_vcpu_debugfs(void)
 455 {
 456         return false;
 457 }
 458
 459 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
 460 {
 461         return 0;
 462 }
 463
 464 void kvm_arch_destroy_vm(struct kvm *kvm)
 465 {
 466         unsigned int i;
 467         struct kvm_vcpu *vcpu;
 468
 469 #ifdef CONFIG_KVM_XICS
 470         /*
 471          * We call kick_all_cpus_sync() to ensure that all
 472          * CPUs have executed any pending IPIs before we
 473          * continue and free VCPUs structures below.
 474          */
 475         if (is_kvmppc_hv_enabled(kvm))
 476                 kick_all_cpus_sync();
 477 #endif
 478
 479         kvm_for_each_vcpu(i, vcpu, kvm)
 480                 kvm_arch_vcpu_free(vcpu);
 481
 482         mutex_lock(&kvm->lock);
 483         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 484                 kvm->vcpus[i] = NULL;
 485
 486         atomic_set(&kvm->online_vcpus, 0);
 487
 488         kvmppc_core_destroy_vm(kvm);
 489
 490         mutex_unlock(&kvm->lock);
 491
 492         /* drop the module reference */
 493         module_put(kvm->arch.kvm_ops->owner);
 494 }
 495
 496 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 497 {
 498         int r;
 499         /* Assume we're using HV mode when the HV module is loaded */
 500         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 501
 502         if (kvm) {
 503                 /*
 504                  * Hooray - we know which VM type we're running on. Depend on
 505                  * that rather than the guess above.
 506                  */
 507                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 508         }
 509
 510         switch (ext) {
 511 #ifdef CONFIG_BOOKE
 512         case KVM_CAP_PPC_BOOKE_SREGS:
 513         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 514         case KVM_CAP_PPC_EPR:
 515 #else
 516         case KVM_CAP_PPC_SEGSTATE:
 517         case KVM_CAP_PPC_HIOR:
 518         case KVM_CAP_PPC_PAPR:
 519 #endif
 520         case KVM_CAP_PPC_UNSET_IRQ:
 521         case KVM_CAP_PPC_IRQ_LEVEL:
 522         case KVM_CAP_ENABLE_CAP:
 523         case KVM_CAP_ENABLE_CAP_VM:
 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                 r = 1;
 560                 break;
 561
 562         case KVM_CAP_PPC_ALLOC_HTAB:
 563                 r = hv_enabled;
 564                 break;
 565 #endif /* CONFIG_PPC_BOOK3S_64 */
 566 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 567         case KVM_CAP_PPC_SMT:
 568                 r = 0;
 569                 if (kvm) {
 570                         if (kvm->arch.emul_smt_mode > 1)
 571                                 r = kvm->arch.emul_smt_mode;
 572                         else
 573                                 r = kvm->arch.smt_mode;
 574                 } else if (hv_enabled) {
 575                         if (cpu_has_feature(CPU_FTR_ARCH_300))
 576                                 r = 1;
 577                         else
 578                                 r = threads_per_subcore;
 579                 }
 580                 break;
 581         case KVM_CAP_PPC_SMT_POSSIBLE:
 582                 r = 1;
 583                 if (hv_enabled) {
 584                         if (!cpu_has_feature(CPU_FTR_ARCH_300))
 585                                 r = ((threads_per_subcore << 1) - 1);
 586                         else
 587                                 /* P9 can emulate dbells, so allow any mode */
 588                                 r = 8 | 4 | 2 | 1;
 589                 }
 590                 break;
 591         case KVM_CAP_PPC_RMA:
 592                 r = 0;
 593                 break;
 594         case KVM_CAP_PPC_HWRNG:
 595                 r = kvmppc_hwrng_present();
 596                 break;
 597         case KVM_CAP_PPC_MMU_RADIX:
 598                 r = !!(hv_enabled && radix_enabled());
 599                 break;
 600         case KVM_CAP_PPC_MMU_HASH_V3:
 601                 r = !!(hv_enabled && !radix_enabled() &&
 602                        cpu_has_feature(CPU_FTR_ARCH_300));
 603                 break;
 604 #endif
 605         case KVM_CAP_SYNC_MMU:
 606 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 607                 r = hv_enabled;
 608 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 609                 r = 1;
 610 #else
 611                 r = 0;
 612 #endif
 613                 break;
 614 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 615         case KVM_CAP_PPC_HTAB_FD:
 616                 r = hv_enabled;
 617                 break;
 618 #endif
 619         case KVM_CAP_NR_VCPUS:
 620                 /*
 621                  * Recommending a number of CPUs is somewhat arbitrary; we
 622                  * return the number of present CPUs for -HV (since a host
 623                  * will have secondary threads "offline"), and for other KVM
 624                  * implementations just count online CPUs.
 625                  */
 626                 if (hv_enabled)
 627                         r = num_present_cpus();
 628                 else
 629                         r = num_online_cpus();
 630                 break;
 631         case KVM_CAP_NR_MEMSLOTS:
 632                 r = KVM_USER_MEM_SLOTS;
 633                 break;
 634         case KVM_CAP_MAX_VCPUS:
 635                 r = KVM_MAX_VCPUS;
 636                 break;
 637         case KVM_CAP_MAX_VCPU_ID:
 638                 r = KVM_MAX_VCPU_ID;
 639                 break;
 640 #ifdef CONFIG_PPC_BOOK3S_64
 641         case KVM_CAP_PPC_GET_SMMU_INFO:
 642                 r = 1;
 643                 break;
 644         case KVM_CAP_SPAPR_MULTITCE:
 645                 r = 1;
 646                 break;
 647         case KVM_CAP_SPAPR_RESIZE_HPT:
 648                 /* Disable this on POWER9 until code handles new HPTE format */
 649                 r = !!hv_enabled && !cpu_has_feature(CPU_FTR_ARCH_300);
 650                 break;
 651 #endif
 652 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 653         case KVM_CAP_PPC_FWNMI:
 654                 r = hv_enabled;
 655                 break;
 656 #endif
 657         case KVM_CAP_PPC_HTM:
 658                 r = cpu_has_feature(CPU_FTR_TM_COMP) && hv_enabled;
 659                 break;
 660         default:
 661                 r = 0;
 662                 break;
 663         }
 664         return r;
 665
 666 }
 667
 668 long kvm_arch_dev_ioctl(struct file *filp,
 669                         unsigned int ioctl, unsigned long arg)
 670 {
 671         return -EINVAL;
 672 }
 673
 674 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 675                            struct kvm_memory_slot *dont)
 676 {
 677         kvmppc_core_free_memslot(kvm, free, dont);
 678 }
 679
 680 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 681                             unsigned long npages)
 682 {
 683         return kvmppc_core_create_memslot(kvm, slot, npages);
 684 }
 685
 686 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 687                                    struct kvm_memory_slot *memslot,
 688                                    const struct kvm_userspace_memory_region *mem,
 689                                    enum kvm_mr_change change)
 690 {
 691         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 692 }
 693
 694 void kvm_arch_commit_memory_region(struct kvm *kvm,
 695                                    const struct kvm_userspace_memory_region *mem,
 696                                    const struct kvm_memory_slot *old,
 697                                    const struct kvm_memory_slot *new,
 698                                    enum kvm_mr_change change)
 699 {
 700         kvmppc_core_commit_memory_region(kvm, mem, old, new);
 701 }
 702
 703 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 704                                    struct kvm_memory_slot *slot)
 705 {
 706         kvmppc_core_flush_memslot(kvm, slot);
 707 }
 708
 709 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 710 {
 711         struct kvm_vcpu *vcpu;
 712         vcpu = kvmppc_core_vcpu_create(kvm, id);
 713         if (!IS_ERR(vcpu)) {
 714                 vcpu->arch.wqp = &vcpu->wq;
 715                 kvmppc_create_vcpu_debugfs(vcpu, id);
 716         }
 717         return vcpu;
 718 }
 719
 720 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 721 {
 722 }
 723
 724 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 725 {
 726         /* Make sure we're not using the vcpu anymore */
 727         hrtimer_cancel(&vcpu->arch.dec_timer);
 728
 729         kvmppc_remove_vcpu_debugfs(vcpu);
 730
 731         switch (vcpu->arch.irq_type) {
 732         case KVMPPC_IRQ_MPIC:
 733                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 734                 break;
 735         case KVMPPC_IRQ_XICS:
 736                 if (xive_enabled())
 737                         kvmppc_xive_cleanup_vcpu(vcpu);
 738                 else
 739                         kvmppc_xics_free_icp(vcpu);
 740                 break;
 741         }
 742
 743         kvmppc_core_vcpu_free(vcpu);
 744 }
 745
 746 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 747 {
 748         kvm_arch_vcpu_free(vcpu);
 749 }
 750
 751 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 752 {
 753         return kvmppc_core_pending_dec(vcpu);
 754 }
 755
 756 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 757 {
 758         struct kvm_vcpu *vcpu;
 759
 760         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 761         kvmppc_decrementer_func(vcpu);
 762
 763         return HRTIMER_NORESTART;
 764 }
 765
 766 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 767 {
 768         int ret;
 769
 770         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 771         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 772         vcpu->arch.dec_expires = get_tb();
 773
 774 #ifdef CONFIG_KVM_EXIT_TIMING
 775         mutex_init(&vcpu->arch.exit_timing_lock);
 776 #endif
 777         ret = kvmppc_subarch_vcpu_init(vcpu);
 778         return ret;
 779 }
 780
 781 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 782 {
 783         kvmppc_mmu_destroy(vcpu);
 784         kvmppc_subarch_vcpu_uninit(vcpu);
 785 }
 786
 787 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 788 {
 789 #ifdef CONFIG_BOOKE
 790         /*
 791          * vrsave (formerly usprg0) isn't used by Linux, but may
 792          * be used by the guest.
 793          *
 794          * On non-booke this is associated with Altivec and
 795          * is handled by code in book3s.c.
 796          */
 797         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 798 #endif
 799         kvmppc_core_vcpu_load(vcpu, cpu);
 800 }
 801
 802 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 803 {
 804         kvmppc_core_vcpu_put(vcpu);
 805 #ifdef CONFIG_BOOKE
 806         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 807 #endif
 808 }
 809
 810 /*
 811  * irq_bypass_add_producer and irq_bypass_del_producer are only
 812  * useful if the architecture supports PCI passthrough.
 813  * irq_bypass_stop and irq_bypass_start are not needed and so
 814  * kvm_ops are not defined for them.
 815  */
 816 bool kvm_arch_has_irq_bypass(void)
 817 {
 818         return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
 819                 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
 820 }
 821
 822 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
 823                                      struct irq_bypass_producer *prod)
 824 {
 825         struct kvm_kernel_irqfd *irqfd =
 826                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 827         struct kvm *kvm = irqfd->kvm;
 828
 829         if (kvm->arch.kvm_ops->irq_bypass_add_producer)
 830                 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
 831
 832         return 0;
 833 }
 834
 835 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
 836                                       struct irq_bypass_producer *prod)
 837 {
 838         struct kvm_kernel_irqfd *irqfd =
 839                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 840         struct kvm *kvm = irqfd->kvm;
 841
 842         if (kvm->arch.kvm_ops->irq_bypass_del_producer)
 843                 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
 844 }
 845
 846 #ifdef CONFIG_VSX
 847 static inline int kvmppc_get_vsr_dword_offset(int index)
 848 {
 849         int offset;
 850
 851         if ((index != 0) && (index != 1))
 852                 return -1;
 853
 854 #ifdef __BIG_ENDIAN
 855         offset =  index;
 856 #else
 857         offset = 1 - index;
 858 #endif
 859
 860         return offset;
 861 }
 862
 863 static inline int kvmppc_get_vsr_word_offset(int index)
 864 {
 865         int offset;
 866
 867         if ((index > 3) || (index < 0))
 868                 return -1;
 869
 870 #ifdef __BIG_ENDIAN
 871         offset = index;
 872 #else
 873         offset = 3 - index;
 874 #endif
 875         return offset;
 876 }
 877
 878 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
 879         u64 gpr)
 880 {
 881         union kvmppc_one_reg val;
 882         int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
 883         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 884
 885         if (offset == -1)
 886                 return;
 887
 888         if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
 889                 val.vval = VCPU_VSX_VR(vcpu, index);
 890                 val.vsxval[offset] = gpr;
 891                 VCPU_VSX_VR(vcpu, index) = val.vval;
 892         } else {
 893                 VCPU_VSX_FPR(vcpu, index, offset) = gpr;
 894         }
 895 }
 896
 897 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
 898         u64 gpr)
 899 {
 900         union kvmppc_one_reg val;
 901         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 902
 903         if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
 904                 val.vval = VCPU_VSX_VR(vcpu, index);
 905                 val.vsxval[0] = gpr;
 906                 val.vsxval[1] = gpr;
 907                 VCPU_VSX_VR(vcpu, index) = val.vval;
 908         } else {
 909                 VCPU_VSX_FPR(vcpu, index, 0) = gpr;
 910                 VCPU_VSX_FPR(vcpu, index, 1) = gpr;
 911         }
 912 }
 913
 914 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
 915         u32 gpr32)
 916 {
 917         union kvmppc_one_reg val;
 918         int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
 919         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 920         int dword_offset, word_offset;
 921
 922         if (offset == -1)
 923                 return;
 924
 925         if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
 926                 val.vval = VCPU_VSX_VR(vcpu, index);
 927                 val.vsx32val[offset] = gpr32;
 928                 VCPU_VSX_VR(vcpu, index) = val.vval;
 929         } else {
 930                 dword_offset = offset / 2;
 931                 word_offset = offset % 2;
 932                 val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
 933                 val.vsx32val[word_offset] = gpr32;
 934                 VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
 935         }
 936 }
 937 #endif /* CONFIG_VSX */
 938
 939 #ifdef CONFIG_PPC_FPU
 940 static inline u64 sp_to_dp(u32 fprs)
 941 {
 942         u64 fprd;
 943
 944         preempt_disable();
 945         enable_kernel_fp();
 946         asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m" (fprd) : "m" (fprs)
 947              : "fr0");
 948         preempt_enable();
 949         return fprd;
 950 }
 951
 952 static inline u32 dp_to_sp(u64 fprd)
 953 {
 954         u32 fprs;
 955
 956         preempt_disable();
 957         enable_kernel_fp();
 958         asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m" (fprs) : "m" (fprd)
 959              : "fr0");
 960         preempt_enable();
 961         return fprs;
 962 }
 963
 964 #else
 965 #define sp_to_dp(x)     (x)
 966 #define dp_to_sp(x)     (x)
 967 #endif /* CONFIG_PPC_FPU */
 968
 969 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 970                                       struct kvm_run *run)
 971 {
 972         u64 uninitialized_var(gpr);
 973
 974         if (run->mmio.len > sizeof(gpr)) {
 975                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 976                 return;
 977         }
 978
 979         if (!vcpu->arch.mmio_host_swabbed) {
 980                 switch (run->mmio.len) {
 981                 case 8: gpr = *(u64 *)run->mmio.data; break;
 982                 case 4: gpr = *(u32 *)run->mmio.data; break;
 983                 case 2: gpr = *(u16 *)run->mmio.data; break;
 984                 case 1: gpr = *(u8 *)run->mmio.data; break;
 985                 }
 986         } else {
 987                 switch (run->mmio.len) {
 988                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
 989                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
 990                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
 991                 case 1: gpr = *(u8 *)run->mmio.data; break;
 992                 }
 993         }
 994
 995         /* conversion between single and double precision */
 996         if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
 997                 gpr = sp_to_dp(gpr);
 998
 999         if (vcpu->arch.mmio_sign_extend) {
1000                 switch (run->mmio.len) {
1001 #ifdef CONFIG_PPC64
1002                 case 4:
1003                         gpr = (s64)(s32)gpr;
1004                         break;
1005 #endif
1006                 case 2:
1007                         gpr = (s64)(s16)gpr;
1008                         break;
1009                 case 1:
1010                         gpr = (s64)(s8)gpr;
1011                         break;
1012                 }
1013         }
1014
1015         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1016         case KVM_MMIO_REG_GPR:
1017                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1018                 break;
1019         case KVM_MMIO_REG_FPR:
1020                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1021                 break;
1022 #ifdef CONFIG_PPC_BOOK3S
1023         case KVM_MMIO_REG_QPR:
1024                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1025                 break;
1026         case KVM_MMIO_REG_FQPR:
1027                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1028                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1029                 break;
1030 #endif
1031 #ifdef CONFIG_VSX
1032         case KVM_MMIO_REG_VSX:
1033                 if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_DWORD)
1034                         kvmppc_set_vsr_dword(vcpu, gpr);
1035                 else if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_WORD)
1036                         kvmppc_set_vsr_word(vcpu, gpr);
1037                 else if (vcpu->arch.mmio_vsx_copy_type ==
1038                                 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1039                         kvmppc_set_vsr_dword_dump(vcpu, gpr);
1040                 break;
1041 #endif
1042         default:
1043                 BUG();
1044         }
1045 }
1046
1047 static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1048                                 unsigned int rt, unsigned int bytes,
1049                                 int is_default_endian, int sign_extend)
1050 {
1051         int idx, ret;
1052         bool host_swabbed;
1053
1054         /* Pity C doesn't have a logical XOR operator */
1055         if (kvmppc_need_byteswap(vcpu)) {
1056                 host_swabbed = is_default_endian;
1057         } else {
1058                 host_swabbed = !is_default_endian;
1059         }
1060
1061         if (bytes > sizeof(run->mmio.data)) {
1062                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1063                        run->mmio.len);
1064         }
1065
1066         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1067         run->mmio.len = bytes;
1068         run->mmio.is_write = 0;
1069
1070         vcpu->arch.io_gpr = rt;
1071         vcpu->arch.mmio_host_swabbed = host_swabbed;
1072         vcpu->mmio_needed = 1;
1073         vcpu->mmio_is_write = 0;
1074         vcpu->arch.mmio_sign_extend = sign_extend;
1075
1076         idx = srcu_read_lock(&vcpu->kvm->srcu);
1077
1078         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1079                               bytes, &run->mmio.data);
1080
1081         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1082
1083         if (!ret) {
1084                 kvmppc_complete_mmio_load(vcpu, run);
1085                 vcpu->mmio_needed = 0;
1086                 return EMULATE_DONE;
1087         }
1088
1089         return EMULATE_DO_MMIO;
1090 }
1091
1092 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1093                        unsigned int rt, unsigned int bytes,
1094                        int is_default_endian)
1095 {
1096         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0);
1097 }
1098 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1099
1100 /* Same as above, but sign extends */
1101 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
1102                         unsigned int rt, unsigned int bytes,
1103                         int is_default_endian)
1104 {
1105         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
1106 }
1107
1108 #ifdef CONFIG_VSX
1109 int kvmppc_handle_vsx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1110                         unsigned int rt, unsigned int bytes,
1111                         int is_default_endian, int mmio_sign_extend)
1112 {
1113         enum emulation_result emulated = EMULATE_DONE;
1114
1115         /* Currently, mmio_vsx_copy_nums only allowed to be less than 4 */
1116         if ( (vcpu->arch.mmio_vsx_copy_nums > 4) ||
1117                 (vcpu->arch.mmio_vsx_copy_nums < 0) ) {
1118                 return EMULATE_FAIL;
1119         }
1120
1121         while (vcpu->arch.mmio_vsx_copy_nums) {
1122                 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1123                         is_default_endian, mmio_sign_extend);
1124
1125                 if (emulated != EMULATE_DONE)
1126                         break;
1127
1128                 vcpu->arch.paddr_accessed += run->mmio.len;
1129
1130                 vcpu->arch.mmio_vsx_copy_nums--;
1131                 vcpu->arch.mmio_vsx_offset++;
1132         }
1133         return emulated;
1134 }
1135 #endif /* CONFIG_VSX */
1136
1137 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1138                         u64 val, unsigned int bytes, int is_default_endian)
1139 {
1140         void *data = run->mmio.data;
1141         int idx, ret;
1142         bool host_swabbed;
1143
1144         /* Pity C doesn't have a logical XOR operator */
1145         if (kvmppc_need_byteswap(vcpu)) {
1146                 host_swabbed = is_default_endian;
1147         } else {
1148                 host_swabbed = !is_default_endian;
1149         }
1150
1151         if (bytes > sizeof(run->mmio.data)) {
1152                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1153                        run->mmio.len);
1154         }
1155
1156         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1157         run->mmio.len = bytes;
1158         run->mmio.is_write = 1;
1159         vcpu->mmio_needed = 1;
1160         vcpu->mmio_is_write = 1;
1161
1162         if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1163                 val = dp_to_sp(val);
1164
1165         /* Store the value at the lowest bytes in 'data'. */
1166         if (!host_swabbed) {
1167                 switch (bytes) {
1168                 case 8: *(u64 *)data = val; break;
1169                 case 4: *(u32 *)data = val; break;
1170                 case 2: *(u16 *)data = val; break;
1171                 case 1: *(u8  *)data = val; break;
1172                 }
1173         } else {
1174                 switch (bytes) {
1175                 case 8: *(u64 *)data = swab64(val); break;
1176                 case 4: *(u32 *)data = swab32(val); break;
1177                 case 2: *(u16 *)data = swab16(val); break;
1178                 case 1: *(u8  *)data = val; break;
1179                 }
1180         }
1181
1182         idx = srcu_read_lock(&vcpu->kvm->srcu);
1183
1184         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1185                                bytes, &run->mmio.data);
1186
1187         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1188
1189         if (!ret) {
1190                 vcpu->mmio_needed = 0;
1191                 return EMULATE_DONE;
1192         }
1193
1194         return EMULATE_DO_MMIO;
1195 }
1196 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1197
1198 #ifdef CONFIG_VSX
1199 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1200 {
1201         u32 dword_offset, word_offset;
1202         union kvmppc_one_reg reg;
1203         int vsx_offset = 0;
1204         int copy_type = vcpu->arch.mmio_vsx_copy_type;
1205         int result = 0;
1206
1207         switch (copy_type) {
1208         case KVMPPC_VSX_COPY_DWORD:
1209                 vsx_offset =
1210                         kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1211
1212                 if (vsx_offset == -1) {
1213                         result = -1;
1214                         break;
1215                 }
1216
1217                 if (!vcpu->arch.mmio_vsx_tx_sx_enabled) {
1218                         *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
1219                 } else {
1220                         reg.vval = VCPU_VSX_VR(vcpu, rs);
1221                         *val = reg.vsxval[vsx_offset];
1222                 }
1223                 break;
1224
1225         case KVMPPC_VSX_COPY_WORD:
1226                 vsx_offset =
1227                         kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1228
1229                 if (vsx_offset == -1) {
1230                         result = -1;
1231                         break;
1232                 }
1233
1234                 if (!vcpu->arch.mmio_vsx_tx_sx_enabled) {
1235                         dword_offset = vsx_offset / 2;
1236                         word_offset = vsx_offset % 2;
1237                         reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
1238                         *val = reg.vsx32val[word_offset];
1239                 } else {
1240                         reg.vval = VCPU_VSX_VR(vcpu, rs);
1241                         *val = reg.vsx32val[vsx_offset];
1242                 }
1243                 break;
1244
1245         default:
1246                 result = -1;
1247                 break;
1248         }
1249
1250         return result;
1251 }
1252
1253 int kvmppc_handle_vsx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1254                         int rs, unsigned int bytes, int is_default_endian)
1255 {
1256         u64 val;
1257         enum emulation_result emulated = EMULATE_DONE;
1258
1259         vcpu->arch.io_gpr = rs;
1260
1261         /* Currently, mmio_vsx_copy_nums only allowed to be less than 4 */
1262         if ( (vcpu->arch.mmio_vsx_copy_nums > 4) ||
1263                 (vcpu->arch.mmio_vsx_copy_nums < 0) ) {
1264                 return EMULATE_FAIL;
1265         }
1266
1267         while (vcpu->arch.mmio_vsx_copy_nums) {
1268                 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1269                         return EMULATE_FAIL;
1270
1271                 emulated = kvmppc_handle_store(run, vcpu,
1272                          val, bytes, is_default_endian);
1273
1274                 if (emulated != EMULATE_DONE)
1275                         break;
1276
1277                 vcpu->arch.paddr_accessed += run->mmio.len;
1278
1279                 vcpu->arch.mmio_vsx_copy_nums--;
1280                 vcpu->arch.mmio_vsx_offset++;
1281         }
1282
1283         return emulated;
1284 }
1285
1286 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu,
1287                         struct kvm_run *run)
1288 {
1289         enum emulation_result emulated = EMULATE_FAIL;
1290         int r;
1291
1292         vcpu->arch.paddr_accessed += run->mmio.len;
1293
1294         if (!vcpu->mmio_is_write) {
1295                 emulated = kvmppc_handle_vsx_load(run, vcpu, vcpu->arch.io_gpr,
1296                          run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1297         } else {
1298                 emulated = kvmppc_handle_vsx_store(run, vcpu,
1299                          vcpu->arch.io_gpr, run->mmio.len, 1);
1300         }
1301
1302         switch (emulated) {
1303         case EMULATE_DO_MMIO:
1304                 run->exit_reason = KVM_EXIT_MMIO;
1305                 r = RESUME_HOST;
1306                 break;
1307         case EMULATE_FAIL:
1308                 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1309                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1310                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1311                 r = RESUME_HOST;
1312                 break;
1313         default:
1314                 r = RESUME_GUEST;
1315                 break;
1316         }
1317         return r;
1318 }
1319 #endif /* CONFIG_VSX */
1320
1321 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1322 {
1323         int r = 0;
1324         union kvmppc_one_reg val;
1325         int size;
1326
1327         size = one_reg_size(reg->id);
1328         if (size > sizeof(val))
1329                 return -EINVAL;
1330
1331         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1332         if (r == -EINVAL) {
1333                 r = 0;
1334                 switch (reg->id) {
1335 #ifdef CONFIG_ALTIVEC
1336                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1337                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1338                                 r = -ENXIO;
1339                                 break;
1340                         }
1341                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1342                         break;
1343                 case KVM_REG_PPC_VSCR:
1344                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1345                                 r = -ENXIO;
1346                                 break;
1347                         }
1348                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1349                         break;
1350                 case KVM_REG_PPC_VRSAVE:
1351                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
1352                         break;
1353 #endif /* CONFIG_ALTIVEC */
1354                 default:
1355                         r = -EINVAL;
1356                         break;
1357                 }
1358         }
1359
1360         if (r)
1361                 return r;
1362
1363         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1364                 r = -EFAULT;
1365
1366         return r;
1367 }
1368
1369 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1370 {
1371         int r;
1372         union kvmppc_one_reg val;
1373         int size;
1374
1375         size = one_reg_size(reg->id);
1376         if (size > sizeof(val))
1377                 return -EINVAL;
1378
1379         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1380                 return -EFAULT;
1381
1382         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1383         if (r == -EINVAL) {
1384                 r = 0;
1385                 switch (reg->id) {
1386 #ifdef CONFIG_ALTIVEC
1387                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1388                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1389                                 r = -ENXIO;
1390                                 break;
1391                         }
1392                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1393                         break;
1394                 case KVM_REG_PPC_VSCR:
1395                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1396                                 r = -ENXIO;
1397                                 break;
1398                         }
1399                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1400                         break;
1401                 case KVM_REG_PPC_VRSAVE:
1402                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1403                                 r = -ENXIO;
1404                                 break;
1405                         }
1406                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
1407                         break;
1408 #endif /* CONFIG_ALTIVEC */
1409                 default:
1410                         r = -EINVAL;
1411                         break;
1412                 }
1413         }
1414
1415         return r;
1416 }
1417
1418 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
1419 {
1420         int r;
1421
1422         if (vcpu->mmio_needed) {
1423                 vcpu->mmio_needed = 0;
1424                 if (!vcpu->mmio_is_write)
1425                         kvmppc_complete_mmio_load(vcpu, run);
1426 #ifdef CONFIG_VSX
1427                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1428                         vcpu->arch.mmio_vsx_copy_nums--;
1429                         vcpu->arch.mmio_vsx_offset++;
1430                 }
1431
1432                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1433                         r = kvmppc_emulate_mmio_vsx_loadstore(vcpu, run);
1434                         if (r == RESUME_HOST) {
1435                                 vcpu->mmio_needed = 1;
1436                                 return r;
1437                         }
1438                 }
1439 #endif
1440         } else if (vcpu->arch.osi_needed) {
1441                 u64 *gprs = run->osi.gprs;
1442                 int i;
1443
1444                 for (i = 0; i < 32; i++)
1445                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1446                 vcpu->arch.osi_needed = 0;
1447         } else if (vcpu->arch.hcall_needed) {
1448                 int i;
1449
1450                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1451                 for (i = 0; i < 9; ++i)
1452                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1453                 vcpu->arch.hcall_needed = 0;
1454 #ifdef CONFIG_BOOKE
1455         } else if (vcpu->arch.epr_needed) {
1456                 kvmppc_set_epr(vcpu, run->epr.epr);
1457                 vcpu->arch.epr_needed = 0;
1458 #endif
1459         }
1460
1461         kvm_sigset_activate(vcpu);
1462
1463         if (run->immediate_exit)
1464                 r = -EINTR;
1465         else
1466                 r = kvmppc_vcpu_run(run, vcpu);
1467
1468         kvm_sigset_deactivate(vcpu);
1469
1470         return r;
1471 }
1472
1473 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1474 {
1475         if (irq->irq == KVM_INTERRUPT_UNSET) {
1476                 kvmppc_core_dequeue_external(vcpu);
1477                 return 0;
1478         }
1479
1480         kvmppc_core_queue_external(vcpu, irq);
1481
1482         kvm_vcpu_kick(vcpu);
1483
1484         return 0;
1485 }
1486
1487 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1488                                      struct kvm_enable_cap *cap)
1489 {
1490         int r;
1491
1492         if (cap->flags)
1493                 return -EINVAL;
1494
1495         switch (cap->cap) {
1496         case KVM_CAP_PPC_OSI:
1497                 r = 0;
1498                 vcpu->arch.osi_enabled = true;
1499                 break;
1500         case KVM_CAP_PPC_PAPR:
1501                 r = 0;
1502                 vcpu->arch.papr_enabled = true;
1503                 break;
1504         case KVM_CAP_PPC_EPR:
1505                 r = 0;
1506                 if (cap->args[0])
1507                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1508                 else
1509                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1510                 break;
1511 #ifdef CONFIG_BOOKE
1512         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1513                 r = 0;
1514                 vcpu->arch.watchdog_enabled = true;
1515                 break;
1516 #endif
1517 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1518         case KVM_CAP_SW_TLB: {
1519                 struct kvm_config_tlb cfg;
1520                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1521
1522                 r = -EFAULT;
1523                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1524                         break;
1525
1526                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1527                 break;
1528         }
1529 #endif
1530 #ifdef CONFIG_KVM_MPIC
1531         case KVM_CAP_IRQ_MPIC: {
1532                 struct fd f;
1533                 struct kvm_device *dev;
1534
1535                 r = -EBADF;
1536                 f = fdget(cap->args[0]);
1537                 if (!f.file)
1538                         break;
1539
1540                 r = -EPERM;
1541                 dev = kvm_device_from_filp(f.file);
1542                 if (dev)
1543                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1544
1545                 fdput(f);
1546                 break;
1547         }
1548 #endif
1549 #ifdef CONFIG_KVM_XICS
1550         case KVM_CAP_IRQ_XICS: {
1551                 struct fd f;
1552                 struct kvm_device *dev;
1553
1554                 r = -EBADF;
1555                 f = fdget(cap->args[0]);
1556                 if (!f.file)
1557                         break;
1558
1559                 r = -EPERM;
1560                 dev = kvm_device_from_filp(f.file);
1561                 if (dev) {
1562                         if (xive_enabled())
1563                                 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1564                         else
1565                                 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1566                 }
1567
1568                 fdput(f);
1569                 break;
1570         }
1571 #endif /* CONFIG_KVM_XICS */
1572 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1573         case KVM_CAP_PPC_FWNMI:
1574                 r = -EINVAL;
1575                 if (!is_kvmppc_hv_enabled(vcpu->kvm))
1576                         break;
1577                 r = 0;
1578                 vcpu->kvm->arch.fwnmi_enabled = true;
1579                 break;
1580 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
1581         default:
1582                 r = -EINVAL;
1583                 break;
1584         }
1585
1586         if (!r)
1587                 r = kvmppc_sanity_check(vcpu);
1588
1589         return r;
1590 }
1591
1592 bool kvm_arch_intc_initialized(struct kvm *kvm)
1593 {
1594 #ifdef CONFIG_KVM_MPIC
1595         if (kvm->arch.mpic)
1596                 return true;
1597 #endif
1598 #ifdef CONFIG_KVM_XICS
1599         if (kvm->arch.xics || kvm->arch.xive)
1600                 return true;
1601 #endif
1602         return false;
1603 }
1604
1605 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1606                                     struct kvm_mp_state *mp_state)
1607 {
1608         return -EINVAL;
1609 }
1610
1611 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1612                                     struct kvm_mp_state *mp_state)
1613 {
1614         return -EINVAL;
1615 }
1616
1617 long kvm_arch_vcpu_ioctl(struct file *filp,
1618                          unsigned int ioctl, unsigned long arg)
1619 {
1620         struct kvm_vcpu *vcpu = filp->private_data;
1621         void __user *argp = (void __user *)arg;
1622         long r;
1623
1624         switch (ioctl) {
1625         case KVM_INTERRUPT: {
1626                 struct kvm_interrupt irq;
1627                 r = -EFAULT;
1628                 if (copy_from_user(&irq, argp, sizeof(irq)))
1629                         goto out;
1630                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1631                 goto out;
1632         }
1633
1634         case KVM_ENABLE_CAP:
1635         {
1636                 struct kvm_enable_cap cap;
1637                 r = -EFAULT;
1638                 if (copy_from_user(&cap, argp, sizeof(cap)))
1639                         goto out;
1640                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1641                 break;
1642         }
1643
1644         case KVM_SET_ONE_REG:
1645         case KVM_GET_ONE_REG:
1646         {
1647                 struct kvm_one_reg reg;
1648                 r = -EFAULT;
1649                 if (copy_from_user(&reg, argp, sizeof(reg)))
1650                         goto out;
1651                 if (ioctl == KVM_SET_ONE_REG)
1652                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1653                 else
1654                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1655                 break;
1656         }
1657
1658 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1659         case KVM_DIRTY_TLB: {
1660                 struct kvm_dirty_tlb dirty;
1661                 r = -EFAULT;
1662                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1663                         goto out;
1664                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1665                 break;
1666         }
1667 #endif
1668         default:
1669                 r = -EINVAL;
1670         }
1671
1672 out:
1673         return r;
1674 }
1675
1676 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1677 {
1678         return VM_FAULT_SIGBUS;
1679 }
1680
1681 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1682 {
1683         u32 inst_nop = 0x60000000;
1684 #ifdef CONFIG_KVM_BOOKE_HV
1685         u32 inst_sc1 = 0x44000022;
1686         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1687         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1688         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1689         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1690 #else
1691         u32 inst_lis = 0x3c000000;
1692         u32 inst_ori = 0x60000000;
1693         u32 inst_sc = 0x44000002;
1694         u32 inst_imm_mask = 0xffff;
1695
1696         /*
1697          * The hypercall to get into KVM from within guest context is as
1698          * follows:
1699          *
1700          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1701          *    ori r0, KVM_SC_MAGIC_R0@l
1702          *    sc
1703          *    nop
1704          */
1705         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1706         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1707         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1708         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1709 #endif
1710
1711         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1712
1713         return 0;
1714 }
1715
1716 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1717                           bool line_status)
1718 {
1719         if (!irqchip_in_kernel(kvm))
1720                 return -ENXIO;
1721
1722         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1723                                         irq_event->irq, irq_event->level,
1724                                         line_status);
1725         return 0;
1726 }
1727
1728
1729 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1730                                    struct kvm_enable_cap *cap)
1731 {
1732         int r;
1733
1734         if (cap->flags)
1735                 return -EINVAL;
1736
1737         switch (cap->cap) {
1738 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1739         case KVM_CAP_PPC_ENABLE_HCALL: {
1740                 unsigned long hcall = cap->args[0];
1741
1742                 r = -EINVAL;
1743                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1744                     cap->args[1] > 1)
1745                         break;
1746                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1747                         break;
1748                 if (cap->args[1])
1749                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1750                 else
1751                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1752                 r = 0;
1753                 break;
1754         }
1755         case KVM_CAP_PPC_SMT: {
1756                 unsigned long mode = cap->args[0];
1757                 unsigned long flags = cap->args[1];
1758
1759                 r = -EINVAL;
1760                 if (kvm->arch.kvm_ops->set_smt_mode)
1761                         r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
1762                 break;
1763         }
1764 #endif
1765         default:
1766                 r = -EINVAL;
1767                 break;
1768         }
1769
1770         return r;
1771 }
1772
1773 long kvm_arch_vm_ioctl(struct file *filp,
1774                        unsigned int ioctl, unsigned long arg)
1775 {
1776         struct kvm *kvm __maybe_unused = filp->private_data;
1777         void __user *argp = (void __user *)arg;
1778         long r;
1779
1780         switch (ioctl) {
1781         case KVM_PPC_GET_PVINFO: {
1782                 struct kvm_ppc_pvinfo pvinfo;
1783                 memset(&pvinfo, 0, sizeof(pvinfo));
1784                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1785                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1786                         r = -EFAULT;
1787                         goto out;
1788                 }
1789
1790                 break;
1791         }
1792         case KVM_ENABLE_CAP:
1793         {
1794                 struct kvm_enable_cap cap;
1795                 r = -EFAULT;
1796                 if (copy_from_user(&cap, argp, sizeof(cap)))
1797                         goto out;
1798                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1799                 break;
1800         }
1801 #ifdef CONFIG_SPAPR_TCE_IOMMU
1802         case KVM_CREATE_SPAPR_TCE_64: {
1803                 struct kvm_create_spapr_tce_64 create_tce_64;
1804
1805                 r = -EFAULT;
1806                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
1807                         goto out;
1808                 if (create_tce_64.flags) {
1809                         r = -EINVAL;
1810                         goto out;
1811                 }
1812                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1813                 goto out;
1814         }
1815         case KVM_CREATE_SPAPR_TCE: {
1816                 struct kvm_create_spapr_tce create_tce;
1817                 struct kvm_create_spapr_tce_64 create_tce_64;
1818
1819                 r = -EFAULT;
1820                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1821                         goto out;
1822
1823                 create_tce_64.liobn = create_tce.liobn;
1824                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
1825                 create_tce_64.offset = 0;
1826                 create_tce_64.size = create_tce.window_size >>
1827                                 IOMMU_PAGE_SHIFT_4K;
1828                 create_tce_64.flags = 0;
1829                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1830                 goto out;
1831         }
1832 #endif
1833 #ifdef CONFIG_PPC_BOOK3S_64
1834         case KVM_PPC_GET_SMMU_INFO: {
1835                 struct kvm_ppc_smmu_info info;
1836                 struct kvm *kvm = filp->private_data;
1837
1838                 memset(&info, 0, sizeof(info));
1839                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1840                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1841                         r = -EFAULT;
1842                 break;
1843         }
1844         case KVM_PPC_RTAS_DEFINE_TOKEN: {
1845                 struct kvm *kvm = filp->private_data;
1846
1847                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1848                 break;
1849         }
1850         case KVM_PPC_CONFIGURE_V3_MMU: {
1851                 struct kvm *kvm = filp->private_data;
1852                 struct kvm_ppc_mmuv3_cfg cfg;
1853
1854                 r = -EINVAL;
1855                 if (!kvm->arch.kvm_ops->configure_mmu)
1856                         goto out;
1857                 r = -EFAULT;
1858                 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1859                         goto out;
1860                 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
1861                 break;
1862         }
1863         case KVM_PPC_GET_RMMU_INFO: {
1864                 struct kvm *kvm = filp->private_data;
1865                 struct kvm_ppc_rmmu_info info;
1866
1867                 r = -EINVAL;
1868                 if (!kvm->arch.kvm_ops->get_rmmu_info)
1869                         goto out;
1870                 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
1871                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1872                         r = -EFAULT;
1873                 break;
1874         }
1875         default: {
1876                 struct kvm *kvm = filp->private_data;
1877                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1878         }
1879 #else /* CONFIG_PPC_BOOK3S_64 */
1880         default:
1881                 r = -ENOTTY;
1882 #endif
1883         }
1884 out:
1885         return r;
1886 }
1887
1888 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1889 static unsigned long nr_lpids;
1890
1891 long kvmppc_alloc_lpid(void)
1892 {
1893         long lpid;
1894
1895         do {
1896                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1897                 if (lpid >= nr_lpids) {
1898                         pr_err("%s: No LPIDs free\n", __func__);
1899                         return -ENOMEM;
1900                 }
1901         } while (test_and_set_bit(lpid, lpid_inuse));
1902
1903         return lpid;
1904 }
1905 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1906
1907 void kvmppc_claim_lpid(long lpid)
1908 {
1909         set_bit(lpid, lpid_inuse);
1910 }
1911 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1912
1913 void kvmppc_free_lpid(long lpid)
1914 {
1915         clear_bit(lpid, lpid_inuse);
1916 }
1917 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1918
1919 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1920 {
1921         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1922         memset(lpid_inuse, 0, sizeof(lpid_inuse));
1923 }
1924 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1925
1926 int kvm_arch_init(void *opaque)
1927 {
1928         return 0;
1929 }
1930
1931 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);