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/xive.h>
  41
  42 #include "timing.h"
  43 #include "irq.h"
  44 #include "../mm/mmu_decl.h"
  45
  46 #define CREATE_TRACE_POINTS
  47 #include "trace.h"
  48
  49 struct kvmppc_ops *kvmppc_hv_ops;
  50 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
  51 struct kvmppc_ops *kvmppc_pr_ops;
  52 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
  53
  54
  55 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  56 {
  57         return !!(v->arch.pending_exceptions) ||
  58                v->requests;
  59 }
  60
  61 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  62 {
  63         return 1;
  64 }
  65
  66 /*
  67  * Common checks before entering the guest world.  Call with interrupts
  68  * disabled.
  69  *
  70  * returns:
  71  *
  72  * == 1 if we're ready to go into guest state
  73  * <= 0 if we need to go back to the host with return value
  74  */
  75 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
  76 {
  77         int r;
  78
  79         WARN_ON(irqs_disabled());
  80         hard_irq_disable();
  81
  82         while (true) {
  83                 if (need_resched()) {
  84                         local_irq_enable();
  85                         cond_resched();
  86                         hard_irq_disable();
  87                         continue;
  88                 }
  89
  90                 if (signal_pending(current)) {
  91                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
  92                         vcpu->run->exit_reason = KVM_EXIT_INTR;
  93                         r = -EINTR;
  94                         break;
  95                 }
  96
  97                 vcpu->mode = IN_GUEST_MODE;
  98
  99                 /*
 100                  * Reading vcpu->requests must happen after setting vcpu->mode,
 101                  * so we don't miss a request because the requester sees
 102                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
 103                  * before next entering the guest (and thus doesn't IPI).
 104                  * This also orders the write to mode from any reads
 105                  * to the page tables done while the VCPU is running.
 106                  * Please see the comment in kvm_flush_remote_tlbs.
 107                  */
 108                 smp_mb();
 109
 110                 if (vcpu->requests) {
 111                         /* Make sure we process requests preemptable */
 112                         local_irq_enable();
 113                         trace_kvm_check_requests(vcpu);
 114                         r = kvmppc_core_check_requests(vcpu);
 115                         hard_irq_disable();
 116                         if (r > 0)
 117                                 continue;
 118                         break;
 119                 }
 120
 121                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 122                         /* interrupts got enabled in between, so we
 123                            are back at square 1 */
 124                         continue;
 125                 }
 126
 127                 guest_enter_irqoff();
 128                 return 1;
 129         }
 130
 131         /* return to host */
 132         local_irq_enable();
 133         return r;
 134 }
 135 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
 136
 137 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 138 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
 139 {
 140         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
 141         int i;
 142
 143         shared->sprg0 = swab64(shared->sprg0);
 144         shared->sprg1 = swab64(shared->sprg1);
 145         shared->sprg2 = swab64(shared->sprg2);
 146         shared->sprg3 = swab64(shared->sprg3);
 147         shared->srr0 = swab64(shared->srr0);
 148         shared->srr1 = swab64(shared->srr1);
 149         shared->dar = swab64(shared->dar);
 150         shared->msr = swab64(shared->msr);
 151         shared->dsisr = swab32(shared->dsisr);
 152         shared->int_pending = swab32(shared->int_pending);
 153         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
 154                 shared->sr[i] = swab32(shared->sr[i]);
 155 }
 156 #endif
 157
 158 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
 159 {
 160         int nr = kvmppc_get_gpr(vcpu, 11);
 161         int r;
 162         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
 163         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
 164         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
 165         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
 166         unsigned long r2 = 0;
 167
 168         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 169                 /* 32 bit mode */
 170                 param1 &= 0xffffffff;
 171                 param2 &= 0xffffffff;
 172                 param3 &= 0xffffffff;
 173                 param4 &= 0xffffffff;
 174         }
 175
 176         switch (nr) {
 177         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
 178         {
 179 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 180                 /* Book3S can be little endian, find it out here */
 181                 int shared_big_endian = true;
 182                 if (vcpu->arch.intr_msr & MSR_LE)
 183                         shared_big_endian = false;
 184                 if (shared_big_endian != vcpu->arch.shared_big_endian)
 185                         kvmppc_swab_shared(vcpu);
 186                 vcpu->arch.shared_big_endian = shared_big_endian;
 187 #endif
 188
 189                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
 190                         /*
 191                          * Older versions of the Linux magic page code had
 192                          * a bug where they would map their trampoline code
 193                          * NX. If that's the case, remove !PR NX capability.
 194                          */
 195                         vcpu->arch.disable_kernel_nx = true;
 196                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 197                 }
 198
 199                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
 200                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
 201
 202 #ifdef CONFIG_PPC_64K_PAGES
 203                 /*
 204                  * Make sure our 4k magic page is in the same window of a 64k
 205                  * page within the guest and within the host's page.
 206                  */
 207                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
 208                     ((ulong)vcpu->arch.shared & 0xf000)) {
 209                         void *old_shared = vcpu->arch.shared;
 210                         ulong shared = (ulong)vcpu->arch.shared;
 211                         void *new_shared;
 212
 213                         shared &= PAGE_MASK;
 214                         shared |= vcpu->arch.magic_page_pa & 0xf000;
 215                         new_shared = (void*)shared;
 216                         memcpy(new_shared, old_shared, 0x1000);
 217                         vcpu->arch.shared = new_shared;
 218                 }
 219 #endif
 220
 221                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
 222
 223                 r = EV_SUCCESS;
 224                 break;
 225         }
 226         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
 227                 r = EV_SUCCESS;
 228 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
 229                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
 230 #endif
 231
 232                 /* Second return value is in r4 */
 233                 break;
 234         case EV_HCALL_TOKEN(EV_IDLE):
 235                 r = EV_SUCCESS;
 236                 kvm_vcpu_block(vcpu);
 237                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 238                 break;
 239         default:
 240                 r = EV_UNIMPLEMENTED;
 241                 break;
 242         }
 243
 244         kvmppc_set_gpr(vcpu, 4, r2);
 245
 246         return r;
 247 }
 248 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
 249
 250 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 251 {
 252         int r = false;
 253
 254         /* We have to know what CPU to virtualize */
 255         if (!vcpu->arch.pvr)
 256                 goto out;
 257
 258         /* PAPR only works with book3s_64 */
 259         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 260                 goto out;
 261
 262         /* HV KVM can only do PAPR mode for now */
 263         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
 264                 goto out;
 265
 266 #ifdef CONFIG_KVM_BOOKE_HV
 267         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 268                 goto out;
 269 #endif
 270
 271         r = true;
 272
 273 out:
 274         vcpu->arch.sane = r;
 275         return r ? 0 : -EINVAL;
 276 }
 277 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
 278
 279 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 280 {
 281         enum emulation_result er;
 282         int r;
 283
 284         er = kvmppc_emulate_loadstore(vcpu);
 285         switch (er) {
 286         case EMULATE_DONE:
 287                 /* Future optimization: only reload non-volatiles if they were
 288                  * actually modified. */
 289                 r = RESUME_GUEST_NV;
 290                 break;
 291         case EMULATE_AGAIN:
 292                 r = RESUME_GUEST;
 293                 break;
 294         case EMULATE_DO_MMIO:
 295                 run->exit_reason = KVM_EXIT_MMIO;
 296                 /* We must reload nonvolatiles because "update" load/store
 297                  * instructions modify register state. */
 298                 /* Future optimization: only reload non-volatiles if they were
 299                  * actually modified. */
 300                 r = RESUME_HOST_NV;
 301                 break;
 302         case EMULATE_FAIL:
 303         {
 304                 u32 last_inst;
 305
 306                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
 307                 /* XXX Deliver Program interrupt to guest. */
 308                 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
 309                 r = RESUME_HOST;
 310                 break;
 311         }
 312         default:
 313                 WARN_ON(1);
 314                 r = RESUME_GUEST;
 315         }
 316
 317         return r;
 318 }
 319 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
 320
 321 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 322               bool data)
 323 {
 324         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 325         struct kvmppc_pte pte;
 326         int r;
 327
 328         vcpu->stat.st++;
 329
 330         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 331                          XLATE_WRITE, &pte);
 332         if (r < 0)
 333                 return r;
 334
 335         *eaddr = pte.raddr;
 336
 337         if (!pte.may_write)
 338                 return -EPERM;
 339
 340         /* Magic page override */
 341         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 342             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 343             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 344                 void *magic = vcpu->arch.shared;
 345                 magic += pte.eaddr & 0xfff;
 346                 memcpy(magic, ptr, size);
 347                 return EMULATE_DONE;
 348         }
 349
 350         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 351                 return EMULATE_DO_MMIO;
 352
 353         return EMULATE_DONE;
 354 }
 355 EXPORT_SYMBOL_GPL(kvmppc_st);
 356
 357 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 358                       bool data)
 359 {
 360         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 361         struct kvmppc_pte pte;
 362         int rc;
 363
 364         vcpu->stat.ld++;
 365
 366         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 367                           XLATE_READ, &pte);
 368         if (rc)
 369                 return rc;
 370
 371         *eaddr = pte.raddr;
 372
 373         if (!pte.may_read)
 374                 return -EPERM;
 375
 376         if (!data && !pte.may_execute)
 377                 return -ENOEXEC;
 378
 379         /* Magic page override */
 380         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 381             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 382             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 383                 void *magic = vcpu->arch.shared;
 384                 magic += pte.eaddr & 0xfff;
 385                 memcpy(ptr, magic, size);
 386                 return EMULATE_DONE;
 387         }
 388
 389         if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
 390                 return EMULATE_DO_MMIO;
 391
 392         return EMULATE_DONE;
 393 }
 394 EXPORT_SYMBOL_GPL(kvmppc_ld);
 395
 396 int kvm_arch_hardware_enable(void)
 397 {
 398         return 0;
 399 }
 400
 401 int kvm_arch_hardware_setup(void)
 402 {
 403         return 0;
 404 }
 405
 406 void kvm_arch_check_processor_compat(void *rtn)
 407 {
 408         *(int *)rtn = kvmppc_core_check_processor_compat();
 409 }
 410
 411 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 412 {
 413         struct kvmppc_ops *kvm_ops = NULL;
 414         /*
 415          * if we have both HV and PR enabled, default is HV
 416          */
 417         if (type == 0) {
 418                 if (kvmppc_hv_ops)
 419                         kvm_ops = kvmppc_hv_ops;
 420                 else
 421                         kvm_ops = kvmppc_pr_ops;
 422                 if (!kvm_ops)
 423                         goto err_out;
 424         } else  if (type == KVM_VM_PPC_HV) {
 425                 if (!kvmppc_hv_ops)
 426                         goto err_out;
 427                 kvm_ops = kvmppc_hv_ops;
 428         } else if (type == KVM_VM_PPC_PR) {
 429                 if (!kvmppc_pr_ops)
 430                         goto err_out;
 431                 kvm_ops = kvmppc_pr_ops;
 432         } else
 433                 goto err_out;
 434
 435         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
 436                 return -ENOENT;
 437
 438         kvm->arch.kvm_ops = kvm_ops;
 439         return kvmppc_core_init_vm(kvm);
 440 err_out:
 441         return -EINVAL;
 442 }
 443
 444 bool kvm_arch_has_vcpu_debugfs(void)
 445 {
 446         return false;
 447 }
 448
 449 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
 450 {
 451         return 0;
 452 }
 453
 454 void kvm_arch_destroy_vm(struct kvm *kvm)
 455 {
 456         unsigned int i;
 457         struct kvm_vcpu *vcpu;
 458
 459 #ifdef CONFIG_KVM_XICS
 460         /*
 461          * We call kick_all_cpus_sync() to ensure that all
 462          * CPUs have executed any pending IPIs before we
 463          * continue and free VCPUs structures below.
 464          */
 465         if (is_kvmppc_hv_enabled(kvm))
 466                 kick_all_cpus_sync();
 467 #endif
 468
 469         kvm_for_each_vcpu(i, vcpu, kvm)
 470                 kvm_arch_vcpu_free(vcpu);
 471
 472         mutex_lock(&kvm->lock);
 473         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 474                 kvm->vcpus[i] = NULL;
 475
 476         atomic_set(&kvm->online_vcpus, 0);
 477
 478         kvmppc_core_destroy_vm(kvm);
 479
 480         mutex_unlock(&kvm->lock);
 481
 482         /* drop the module reference */
 483         module_put(kvm->arch.kvm_ops->owner);
 484 }
 485
 486 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 487 {
 488         int r;
 489         /* Assume we're using HV mode when the HV module is loaded */
 490         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 491
 492         if (kvm) {
 493                 /*
 494                  * Hooray - we know which VM type we're running on. Depend on
 495                  * that rather than the guess above.
 496                  */
 497                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 498         }
 499
 500         switch (ext) {
 501 #ifdef CONFIG_BOOKE
 502         case KVM_CAP_PPC_BOOKE_SREGS:
 503         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 504         case KVM_CAP_PPC_EPR:
 505 #else
 506         case KVM_CAP_PPC_SEGSTATE:
 507         case KVM_CAP_PPC_HIOR:
 508         case KVM_CAP_PPC_PAPR:
 509 #endif
 510         case KVM_CAP_PPC_UNSET_IRQ:
 511         case KVM_CAP_PPC_IRQ_LEVEL:
 512         case KVM_CAP_ENABLE_CAP:
 513         case KVM_CAP_ENABLE_CAP_VM:
 514         case KVM_CAP_ONE_REG:
 515         case KVM_CAP_IOEVENTFD:
 516         case KVM_CAP_DEVICE_CTRL:
 517         case KVM_CAP_IMMEDIATE_EXIT:
 518                 r = 1;
 519                 break;
 520         case KVM_CAP_PPC_PAIRED_SINGLES:
 521         case KVM_CAP_PPC_OSI:
 522         case KVM_CAP_PPC_GET_PVINFO:
 523 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 524         case KVM_CAP_SW_TLB:
 525 #endif
 526                 /* We support this only for PR */
 527                 r = !hv_enabled;
 528                 break;
 529 #ifdef CONFIG_KVM_MMIO
 530         case KVM_CAP_COALESCED_MMIO:
 531                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 532                 break;
 533 #endif
 534 #ifdef CONFIG_KVM_MPIC
 535         case KVM_CAP_IRQ_MPIC:
 536                 r = 1;
 537                 break;
 538 #endif
 539
 540 #ifdef CONFIG_PPC_BOOK3S_64
 541         case KVM_CAP_SPAPR_TCE:
 542         case KVM_CAP_SPAPR_TCE_64:
 543         case KVM_CAP_PPC_RTAS:
 544         case KVM_CAP_PPC_FIXUP_HCALL:
 545         case KVM_CAP_PPC_ENABLE_HCALL:
 546 #ifdef CONFIG_KVM_XICS
 547         case KVM_CAP_IRQ_XICS:
 548 #endif
 549                 r = 1;
 550                 break;
 551
 552         case KVM_CAP_PPC_ALLOC_HTAB:
 553                 r = hv_enabled;
 554                 break;
 555 #endif /* CONFIG_PPC_BOOK3S_64 */
 556 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 557         case KVM_CAP_PPC_SMT:
 558                 r = 0;
 559                 if (hv_enabled) {
 560                         if (cpu_has_feature(CPU_FTR_ARCH_300))
 561                                 r = 1;
 562                         else
 563                                 r = threads_per_subcore;
 564                 }
 565                 break;
 566         case KVM_CAP_PPC_RMA:
 567                 r = 0;
 568                 break;
 569         case KVM_CAP_PPC_HWRNG:
 570                 r = kvmppc_hwrng_present();
 571                 break;
 572         case KVM_CAP_PPC_MMU_RADIX:
 573                 r = !!(hv_enabled && radix_enabled());
 574                 break;
 575         case KVM_CAP_PPC_MMU_HASH_V3:
 576                 r = !!(hv_enabled && !radix_enabled() &&
 577                        cpu_has_feature(CPU_FTR_ARCH_300));
 578                 break;
 579 #endif
 580         case KVM_CAP_SYNC_MMU:
 581 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 582                 r = hv_enabled;
 583 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 584                 r = 1;
 585 #else
 586                 r = 0;
 587 #endif
 588                 break;
 589 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 590         case KVM_CAP_PPC_HTAB_FD:
 591                 r = hv_enabled;
 592                 break;
 593 #endif
 594         case KVM_CAP_NR_VCPUS:
 595                 /*
 596                  * Recommending a number of CPUs is somewhat arbitrary; we
 597                  * return the number of present CPUs for -HV (since a host
 598                  * will have secondary threads "offline"), and for other KVM
 599                  * implementations just count online CPUs.
 600                  */
 601                 if (hv_enabled)
 602                         r = num_present_cpus();
 603                 else
 604                         r = num_online_cpus();
 605                 break;
 606         case KVM_CAP_NR_MEMSLOTS:
 607                 r = KVM_USER_MEM_SLOTS;
 608                 break;
 609         case KVM_CAP_MAX_VCPUS:
 610                 r = KVM_MAX_VCPUS;
 611                 break;
 612 #ifdef CONFIG_PPC_BOOK3S_64
 613         case KVM_CAP_PPC_GET_SMMU_INFO:
 614                 r = 1;
 615                 break;
 616         case KVM_CAP_SPAPR_MULTITCE:
 617                 r = 1;
 618                 break;
 619         case KVM_CAP_SPAPR_RESIZE_HPT:
 620                 /* Disable this on POWER9 until code handles new HPTE format */
 621                 r = !!hv_enabled && !cpu_has_feature(CPU_FTR_ARCH_300);
 622                 break;
 623 #endif
 624         case KVM_CAP_PPC_HTM:
 625                 r = cpu_has_feature(CPU_FTR_TM_COMP) &&
 626                     is_kvmppc_hv_enabled(kvm);
 627                 break;
 628         default:
 629                 r = 0;
 630                 break;
 631         }
 632         return r;
 633
 634 }
 635
 636 long kvm_arch_dev_ioctl(struct file *filp,
 637                         unsigned int ioctl, unsigned long arg)
 638 {
 639         return -EINVAL;
 640 }
 641
 642 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 643                            struct kvm_memory_slot *dont)
 644 {
 645         kvmppc_core_free_memslot(kvm, free, dont);
 646 }
 647
 648 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 649                             unsigned long npages)
 650 {
 651         return kvmppc_core_create_memslot(kvm, slot, npages);
 652 }
 653
 654 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 655                                    struct kvm_memory_slot *memslot,
 656                                    const struct kvm_userspace_memory_region *mem,
 657                                    enum kvm_mr_change change)
 658 {
 659         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 660 }
 661
 662 void kvm_arch_commit_memory_region(struct kvm *kvm,
 663                                    const struct kvm_userspace_memory_region *mem,
 664                                    const struct kvm_memory_slot *old,
 665                                    const struct kvm_memory_slot *new,
 666                                    enum kvm_mr_change change)
 667 {
 668         kvmppc_core_commit_memory_region(kvm, mem, old, new);
 669 }
 670
 671 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 672                                    struct kvm_memory_slot *slot)
 673 {
 674         kvmppc_core_flush_memslot(kvm, slot);
 675 }
 676
 677 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 678 {
 679         struct kvm_vcpu *vcpu;
 680         vcpu = kvmppc_core_vcpu_create(kvm, id);
 681         if (!IS_ERR(vcpu)) {
 682                 vcpu->arch.wqp = &vcpu->wq;
 683                 kvmppc_create_vcpu_debugfs(vcpu, id);
 684         }
 685         return vcpu;
 686 }
 687
 688 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 689 {
 690 }
 691
 692 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 693 {
 694         /* Make sure we're not using the vcpu anymore */
 695         hrtimer_cancel(&vcpu->arch.dec_timer);
 696
 697         kvmppc_remove_vcpu_debugfs(vcpu);
 698
 699         switch (vcpu->arch.irq_type) {
 700         case KVMPPC_IRQ_MPIC:
 701                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 702                 break;
 703         case KVMPPC_IRQ_XICS:
 704                 if (xive_enabled())
 705                         kvmppc_xive_cleanup_vcpu(vcpu);
 706                 else
 707                         kvmppc_xics_free_icp(vcpu);
 708                 break;
 709         }
 710
 711         kvmppc_core_vcpu_free(vcpu);
 712 }
 713
 714 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 715 {
 716         kvm_arch_vcpu_free(vcpu);
 717 }
 718
 719 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 720 {
 721         return kvmppc_core_pending_dec(vcpu);
 722 }
 723
 724 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 725 {
 726         struct kvm_vcpu *vcpu;
 727
 728         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 729         kvmppc_decrementer_func(vcpu);
 730
 731         return HRTIMER_NORESTART;
 732 }
 733
 734 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 735 {
 736         int ret;
 737
 738         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 739         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 740         vcpu->arch.dec_expires = ~(u64)0;
 741
 742 #ifdef CONFIG_KVM_EXIT_TIMING
 743         mutex_init(&vcpu->arch.exit_timing_lock);
 744 #endif
 745         ret = kvmppc_subarch_vcpu_init(vcpu);
 746         return ret;
 747 }
 748
 749 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 750 {
 751         kvmppc_mmu_destroy(vcpu);
 752         kvmppc_subarch_vcpu_uninit(vcpu);
 753 }
 754
 755 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 756 {
 757 #ifdef CONFIG_BOOKE
 758         /*
 759          * vrsave (formerly usprg0) isn't used by Linux, but may
 760          * be used by the guest.
 761          *
 762          * On non-booke this is associated with Altivec and
 763          * is handled by code in book3s.c.
 764          */
 765         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 766 #endif
 767         kvmppc_core_vcpu_load(vcpu, cpu);
 768 }
 769
 770 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 771 {
 772         kvmppc_core_vcpu_put(vcpu);
 773 #ifdef CONFIG_BOOKE
 774         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 775 #endif
 776 }
 777
 778 /*
 779  * irq_bypass_add_producer and irq_bypass_del_producer are only
 780  * useful if the architecture supports PCI passthrough.
 781  * irq_bypass_stop and irq_bypass_start are not needed and so
 782  * kvm_ops are not defined for them.
 783  */
 784 bool kvm_arch_has_irq_bypass(void)
 785 {
 786         return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
 787                 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
 788 }
 789
 790 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
 791                                      struct irq_bypass_producer *prod)
 792 {
 793         struct kvm_kernel_irqfd *irqfd =
 794                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 795         struct kvm *kvm = irqfd->kvm;
 796
 797         if (kvm->arch.kvm_ops->irq_bypass_add_producer)
 798                 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
 799
 800         return 0;
 801 }
 802
 803 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
 804                                       struct irq_bypass_producer *prod)
 805 {
 806         struct kvm_kernel_irqfd *irqfd =
 807                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 808         struct kvm *kvm = irqfd->kvm;
 809
 810         if (kvm->arch.kvm_ops->irq_bypass_del_producer)
 811                 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
 812 }
 813
 814 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 815                                       struct kvm_run *run)
 816 {
 817         u64 uninitialized_var(gpr);
 818
 819         if (run->mmio.len > sizeof(gpr)) {
 820                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 821                 return;
 822         }
 823
 824         if (!vcpu->arch.mmio_host_swabbed) {
 825                 switch (run->mmio.len) {
 826                 case 8: gpr = *(u64 *)run->mmio.data; break;
 827                 case 4: gpr = *(u32 *)run->mmio.data; break;
 828                 case 2: gpr = *(u16 *)run->mmio.data; break;
 829                 case 1: gpr = *(u8 *)run->mmio.data; break;
 830                 }
 831         } else {
 832                 switch (run->mmio.len) {
 833                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
 834                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
 835                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
 836                 case 1: gpr = *(u8 *)run->mmio.data; break;
 837                 }
 838         }
 839
 840         if (vcpu->arch.mmio_sign_extend) {
 841                 switch (run->mmio.len) {
 842 #ifdef CONFIG_PPC64
 843                 case 4:
 844                         gpr = (s64)(s32)gpr;
 845                         break;
 846 #endif
 847                 case 2:
 848                         gpr = (s64)(s16)gpr;
 849                         break;
 850                 case 1:
 851                         gpr = (s64)(s8)gpr;
 852                         break;
 853                 }
 854         }
 855
 856         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 857
 858         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
 859         case KVM_MMIO_REG_GPR:
 860                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 861                 break;
 862         case KVM_MMIO_REG_FPR:
 863                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 864                 break;
 865 #ifdef CONFIG_PPC_BOOK3S
 866         case KVM_MMIO_REG_QPR:
 867                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 868                 break;
 869         case KVM_MMIO_REG_FQPR:
 870                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 871                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 872                 break;
 873 #endif
 874         default:
 875                 BUG();
 876         }
 877 }
 878
 879 static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 880                                 unsigned int rt, unsigned int bytes,
 881                                 int is_default_endian, int sign_extend)
 882 {
 883         int idx, ret;
 884         bool host_swabbed;
 885
 886         /* Pity C doesn't have a logical XOR operator */
 887         if (kvmppc_need_byteswap(vcpu)) {
 888                 host_swabbed = is_default_endian;
 889         } else {
 890                 host_swabbed = !is_default_endian;
 891         }
 892
 893         if (bytes > sizeof(run->mmio.data)) {
 894                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 895                        run->mmio.len);
 896         }
 897
 898         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 899         run->mmio.len = bytes;
 900         run->mmio.is_write = 0;
 901
 902         vcpu->arch.io_gpr = rt;
 903         vcpu->arch.mmio_host_swabbed = host_swabbed;
 904         vcpu->mmio_needed = 1;
 905         vcpu->mmio_is_write = 0;
 906         vcpu->arch.mmio_sign_extend = sign_extend;
 907
 908         idx = srcu_read_lock(&vcpu->kvm->srcu);
 909
 910         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
 911                               bytes, &run->mmio.data);
 912
 913         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 914
 915         if (!ret) {
 916                 kvmppc_complete_mmio_load(vcpu, run);
 917                 vcpu->mmio_needed = 0;
 918                 return EMULATE_DONE;
 919         }
 920
 921         return EMULATE_DO_MMIO;
 922 }
 923
 924 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 925                        unsigned int rt, unsigned int bytes,
 926                        int is_default_endian)
 927 {
 928         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0);
 929 }
 930 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
 931
 932 /* Same as above, but sign extends */
 933 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 934                         unsigned int rt, unsigned int bytes,
 935                         int is_default_endian)
 936 {
 937         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
 938 }
 939
 940 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 941                         u64 val, unsigned int bytes, int is_default_endian)
 942 {
 943         void *data = run->mmio.data;
 944         int idx, ret;
 945         bool host_swabbed;
 946
 947         /* Pity C doesn't have a logical XOR operator */
 948         if (kvmppc_need_byteswap(vcpu)) {
 949                 host_swabbed = is_default_endian;
 950         } else {
 951                 host_swabbed = !is_default_endian;
 952         }
 953
 954         if (bytes > sizeof(run->mmio.data)) {
 955                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 956                        run->mmio.len);
 957         }
 958
 959         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 960         run->mmio.len = bytes;
 961         run->mmio.is_write = 1;
 962         vcpu->mmio_needed = 1;
 963         vcpu->mmio_is_write = 1;
 964
 965         /* Store the value at the lowest bytes in 'data'. */
 966         if (!host_swabbed) {
 967                 switch (bytes) {
 968                 case 8: *(u64 *)data = val; break;
 969                 case 4: *(u32 *)data = val; break;
 970                 case 2: *(u16 *)data = val; break;
 971                 case 1: *(u8  *)data = val; break;
 972                 }
 973         } else {
 974                 switch (bytes) {
 975                 case 8: *(u64 *)data = swab64(val); break;
 976                 case 4: *(u32 *)data = swab32(val); break;
 977                 case 2: *(u16 *)data = swab16(val); break;
 978                 case 1: *(u8  *)data = val; break;
 979                 }
 980         }
 981
 982         idx = srcu_read_lock(&vcpu->kvm->srcu);
 983
 984         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
 985                                bytes, &run->mmio.data);
 986
 987         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 988
 989         if (!ret) {
 990                 vcpu->mmio_needed = 0;
 991                 return EMULATE_DONE;
 992         }
 993
 994         return EMULATE_DO_MMIO;
 995 }
 996 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
 997
 998 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 999 {
1000         int r = 0;
1001         union kvmppc_one_reg val;
1002         int size;
1003
1004         size = one_reg_size(reg->id);
1005         if (size > sizeof(val))
1006                 return -EINVAL;
1007
1008         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1009         if (r == -EINVAL) {
1010                 r = 0;
1011                 switch (reg->id) {
1012 #ifdef CONFIG_ALTIVEC
1013                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1014                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1015                                 r = -ENXIO;
1016                                 break;
1017                         }
1018                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1019                         break;
1020                 case KVM_REG_PPC_VSCR:
1021                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1022                                 r = -ENXIO;
1023                                 break;
1024                         }
1025                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1026                         break;
1027                 case KVM_REG_PPC_VRSAVE:
1028                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
1029                         break;
1030 #endif /* CONFIG_ALTIVEC */
1031                 default:
1032                         r = -EINVAL;
1033                         break;
1034                 }
1035         }
1036
1037         if (r)
1038                 return r;
1039
1040         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1041                 r = -EFAULT;
1042
1043         return r;
1044 }
1045
1046 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1047 {
1048         int r;
1049         union kvmppc_one_reg val;
1050         int size;
1051
1052         size = one_reg_size(reg->id);
1053         if (size > sizeof(val))
1054                 return -EINVAL;
1055
1056         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1057                 return -EFAULT;
1058
1059         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1060         if (r == -EINVAL) {
1061                 r = 0;
1062                 switch (reg->id) {
1063 #ifdef CONFIG_ALTIVEC
1064                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1065                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1066                                 r = -ENXIO;
1067                                 break;
1068                         }
1069                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1070                         break;
1071                 case KVM_REG_PPC_VSCR:
1072                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1073                                 r = -ENXIO;
1074                                 break;
1075                         }
1076                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1077                         break;
1078                 case KVM_REG_PPC_VRSAVE:
1079                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1080                                 r = -ENXIO;
1081                                 break;
1082                         }
1083                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
1084                         break;
1085 #endif /* CONFIG_ALTIVEC */
1086                 default:
1087                         r = -EINVAL;
1088                         break;
1089                 }
1090         }
1091
1092         return r;
1093 }
1094
1095 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
1096 {
1097         int r;
1098         sigset_t sigsaved;
1099
1100         if (vcpu->sigset_active)
1101                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
1102
1103         if (vcpu->mmio_needed) {
1104                 if (!vcpu->mmio_is_write)
1105                         kvmppc_complete_mmio_load(vcpu, run);
1106                 vcpu->mmio_needed = 0;
1107         } else if (vcpu->arch.osi_needed) {
1108                 u64 *gprs = run->osi.gprs;
1109                 int i;
1110
1111                 for (i = 0; i < 32; i++)
1112                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1113                 vcpu->arch.osi_needed = 0;
1114         } else if (vcpu->arch.hcall_needed) {
1115                 int i;
1116
1117                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1118                 for (i = 0; i < 9; ++i)
1119                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1120                 vcpu->arch.hcall_needed = 0;
1121 #ifdef CONFIG_BOOKE
1122         } else if (vcpu->arch.epr_needed) {
1123                 kvmppc_set_epr(vcpu, run->epr.epr);
1124                 vcpu->arch.epr_needed = 0;
1125 #endif
1126         }
1127
1128         if (run->immediate_exit)
1129                 r = -EINTR;
1130         else
1131                 r = kvmppc_vcpu_run(run, vcpu);
1132
1133         if (vcpu->sigset_active)
1134                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1135
1136         return r;
1137 }
1138
1139 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1140 {
1141         if (irq->irq == KVM_INTERRUPT_UNSET) {
1142                 kvmppc_core_dequeue_external(vcpu);
1143                 return 0;
1144         }
1145
1146         kvmppc_core_queue_external(vcpu, irq);
1147
1148         kvm_vcpu_kick(vcpu);
1149
1150         return 0;
1151 }
1152
1153 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1154                                      struct kvm_enable_cap *cap)
1155 {
1156         int r;
1157
1158         if (cap->flags)
1159                 return -EINVAL;
1160
1161         switch (cap->cap) {
1162         case KVM_CAP_PPC_OSI:
1163                 r = 0;
1164                 vcpu->arch.osi_enabled = true;
1165                 break;
1166         case KVM_CAP_PPC_PAPR:
1167                 r = 0;
1168                 vcpu->arch.papr_enabled = true;
1169                 break;
1170         case KVM_CAP_PPC_EPR:
1171                 r = 0;
1172                 if (cap->args[0])
1173                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1174                 else
1175                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1176                 break;
1177 #ifdef CONFIG_BOOKE
1178         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1179                 r = 0;
1180                 vcpu->arch.watchdog_enabled = true;
1181                 break;
1182 #endif
1183 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1184         case KVM_CAP_SW_TLB: {
1185                 struct kvm_config_tlb cfg;
1186                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1187
1188                 r = -EFAULT;
1189                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1190                         break;
1191
1192                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1193                 break;
1194         }
1195 #endif
1196 #ifdef CONFIG_KVM_MPIC
1197         case KVM_CAP_IRQ_MPIC: {
1198                 struct fd f;
1199                 struct kvm_device *dev;
1200
1201                 r = -EBADF;
1202                 f = fdget(cap->args[0]);
1203                 if (!f.file)
1204                         break;
1205
1206                 r = -EPERM;
1207                 dev = kvm_device_from_filp(f.file);
1208                 if (dev)
1209                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1210
1211                 fdput(f);
1212                 break;
1213         }
1214 #endif
1215 #ifdef CONFIG_KVM_XICS
1216         case KVM_CAP_IRQ_XICS: {
1217                 struct fd f;
1218                 struct kvm_device *dev;
1219
1220                 r = -EBADF;
1221                 f = fdget(cap->args[0]);
1222                 if (!f.file)
1223                         break;
1224
1225                 r = -EPERM;
1226                 dev = kvm_device_from_filp(f.file);
1227                 if (dev) {
1228                         if (xive_enabled())
1229                                 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1230                         else
1231                                 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1232                 }
1233
1234                 fdput(f);
1235                 break;
1236         }
1237 #endif /* CONFIG_KVM_XICS */
1238         default:
1239                 r = -EINVAL;
1240                 break;
1241         }
1242
1243         if (!r)
1244                 r = kvmppc_sanity_check(vcpu);
1245
1246         return r;
1247 }
1248
1249 bool kvm_arch_intc_initialized(struct kvm *kvm)
1250 {
1251 #ifdef CONFIG_KVM_MPIC
1252         if (kvm->arch.mpic)
1253                 return true;
1254 #endif
1255 #ifdef CONFIG_KVM_XICS
1256         if (kvm->arch.xics || kvm->arch.xive)
1257                 return true;
1258 #endif
1259         return false;
1260 }
1261
1262 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1263                                     struct kvm_mp_state *mp_state)
1264 {
1265         return -EINVAL;
1266 }
1267
1268 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1269                                     struct kvm_mp_state *mp_state)
1270 {
1271         return -EINVAL;
1272 }
1273
1274 long kvm_arch_vcpu_ioctl(struct file *filp,
1275                          unsigned int ioctl, unsigned long arg)
1276 {
1277         struct kvm_vcpu *vcpu = filp->private_data;
1278         void __user *argp = (void __user *)arg;
1279         long r;
1280
1281         switch (ioctl) {
1282         case KVM_INTERRUPT: {
1283                 struct kvm_interrupt irq;
1284                 r = -EFAULT;
1285                 if (copy_from_user(&irq, argp, sizeof(irq)))
1286                         goto out;
1287                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1288                 goto out;
1289         }
1290
1291         case KVM_ENABLE_CAP:
1292         {
1293                 struct kvm_enable_cap cap;
1294                 r = -EFAULT;
1295                 if (copy_from_user(&cap, argp, sizeof(cap)))
1296                         goto out;
1297                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1298                 break;
1299         }
1300
1301         case KVM_SET_ONE_REG:
1302         case KVM_GET_ONE_REG:
1303         {
1304                 struct kvm_one_reg reg;
1305                 r = -EFAULT;
1306                 if (copy_from_user(&reg, argp, sizeof(reg)))
1307                         goto out;
1308                 if (ioctl == KVM_SET_ONE_REG)
1309                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1310                 else
1311                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1312                 break;
1313         }
1314
1315 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1316         case KVM_DIRTY_TLB: {
1317                 struct kvm_dirty_tlb dirty;
1318                 r = -EFAULT;
1319                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1320                         goto out;
1321                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1322                 break;
1323         }
1324 #endif
1325         default:
1326                 r = -EINVAL;
1327         }
1328
1329 out:
1330         return r;
1331 }
1332
1333 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1334 {
1335         return VM_FAULT_SIGBUS;
1336 }
1337
1338 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1339 {
1340         u32 inst_nop = 0x60000000;
1341 #ifdef CONFIG_KVM_BOOKE_HV
1342         u32 inst_sc1 = 0x44000022;
1343         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1344         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1345         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1346         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1347 #else
1348         u32 inst_lis = 0x3c000000;
1349         u32 inst_ori = 0x60000000;
1350         u32 inst_sc = 0x44000002;
1351         u32 inst_imm_mask = 0xffff;
1352
1353         /*
1354          * The hypercall to get into KVM from within guest context is as
1355          * follows:
1356          *
1357          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1358          *    ori r0, KVM_SC_MAGIC_R0@l
1359          *    sc
1360          *    nop
1361          */
1362         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1363         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1364         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1365         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1366 #endif
1367
1368         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1369
1370         return 0;
1371 }
1372
1373 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1374                           bool line_status)
1375 {
1376         if (!irqchip_in_kernel(kvm))
1377                 return -ENXIO;
1378
1379         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1380                                         irq_event->irq, irq_event->level,
1381                                         line_status);
1382         return 0;
1383 }
1384
1385
1386 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1387                                    struct kvm_enable_cap *cap)
1388 {
1389         int r;
1390
1391         if (cap->flags)
1392                 return -EINVAL;
1393
1394         switch (cap->cap) {
1395 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1396         case KVM_CAP_PPC_ENABLE_HCALL: {
1397                 unsigned long hcall = cap->args[0];
1398
1399                 r = -EINVAL;
1400                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1401                     cap->args[1] > 1)
1402                         break;
1403                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1404                         break;
1405                 if (cap->args[1])
1406                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1407                 else
1408                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1409                 r = 0;
1410                 break;
1411         }
1412 #endif
1413         default:
1414                 r = -EINVAL;
1415                 break;
1416         }
1417
1418         return r;
1419 }
1420
1421 long kvm_arch_vm_ioctl(struct file *filp,
1422                        unsigned int ioctl, unsigned long arg)
1423 {
1424         struct kvm *kvm __maybe_unused = filp->private_data;
1425         void __user *argp = (void __user *)arg;
1426         long r;
1427
1428         switch (ioctl) {
1429         case KVM_PPC_GET_PVINFO: {
1430                 struct kvm_ppc_pvinfo pvinfo;
1431                 memset(&pvinfo, 0, sizeof(pvinfo));
1432                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1433                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1434                         r = -EFAULT;
1435                         goto out;
1436                 }
1437
1438                 break;
1439         }
1440         case KVM_ENABLE_CAP:
1441         {
1442                 struct kvm_enable_cap cap;
1443                 r = -EFAULT;
1444                 if (copy_from_user(&cap, argp, sizeof(cap)))
1445                         goto out;
1446                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1447                 break;
1448         }
1449 #ifdef CONFIG_PPC_BOOK3S_64
1450         case KVM_CREATE_SPAPR_TCE_64: {
1451                 struct kvm_create_spapr_tce_64 create_tce_64;
1452
1453                 r = -EFAULT;
1454                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
1455                         goto out;
1456                 if (create_tce_64.flags) {
1457                         r = -EINVAL;
1458                         goto out;
1459                 }
1460                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1461                 goto out;
1462         }
1463         case KVM_CREATE_SPAPR_TCE: {
1464                 struct kvm_create_spapr_tce create_tce;
1465                 struct kvm_create_spapr_tce_64 create_tce_64;
1466
1467                 r = -EFAULT;
1468                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1469                         goto out;
1470
1471                 create_tce_64.liobn = create_tce.liobn;
1472                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
1473                 create_tce_64.offset = 0;
1474                 create_tce_64.size = create_tce.window_size >>
1475                                 IOMMU_PAGE_SHIFT_4K;
1476                 create_tce_64.flags = 0;
1477                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1478                 goto out;
1479         }
1480         case KVM_PPC_GET_SMMU_INFO: {
1481                 struct kvm_ppc_smmu_info info;
1482                 struct kvm *kvm = filp->private_data;
1483
1484                 memset(&info, 0, sizeof(info));
1485                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1486                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1487                         r = -EFAULT;
1488                 break;
1489         }
1490         case KVM_PPC_RTAS_DEFINE_TOKEN: {
1491                 struct kvm *kvm = filp->private_data;
1492
1493                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1494                 break;
1495         }
1496         case KVM_PPC_CONFIGURE_V3_MMU: {
1497                 struct kvm *kvm = filp->private_data;
1498                 struct kvm_ppc_mmuv3_cfg cfg;
1499
1500                 r = -EINVAL;
1501                 if (!kvm->arch.kvm_ops->configure_mmu)
1502                         goto out;
1503                 r = -EFAULT;
1504                 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1505                         goto out;
1506                 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
1507                 break;
1508         }
1509         case KVM_PPC_GET_RMMU_INFO: {
1510                 struct kvm *kvm = filp->private_data;
1511                 struct kvm_ppc_rmmu_info info;
1512
1513                 r = -EINVAL;
1514                 if (!kvm->arch.kvm_ops->get_rmmu_info)
1515                         goto out;
1516                 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
1517                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1518                         r = -EFAULT;
1519                 break;
1520         }
1521         default: {
1522                 struct kvm *kvm = filp->private_data;
1523                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1524         }
1525 #else /* CONFIG_PPC_BOOK3S_64 */
1526         default:
1527                 r = -ENOTTY;
1528 #endif
1529         }
1530 out:
1531         return r;
1532 }
1533
1534 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1535 static unsigned long nr_lpids;
1536
1537 long kvmppc_alloc_lpid(void)
1538 {
1539         long lpid;
1540
1541         do {
1542                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1543                 if (lpid >= nr_lpids) {
1544                         pr_err("%s: No LPIDs free\n", __func__);
1545                         return -ENOMEM;
1546                 }
1547         } while (test_and_set_bit(lpid, lpid_inuse));
1548
1549         return lpid;
1550 }
1551 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1552
1553 void kvmppc_claim_lpid(long lpid)
1554 {
1555         set_bit(lpid, lpid_inuse);
1556 }
1557 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1558
1559 void kvmppc_free_lpid(long lpid)
1560 {
1561         clear_bit(lpid, lpid_inuse);
1562 }
1563 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1564
1565 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1566 {
1567         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1568         memset(lpid_inuse, 0, sizeof(lpid_inuse));
1569 }
1570 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1571
1572 int kvm_arch_init(void *opaque)
1573 {
1574         return 0;
1575 }
1576
1577 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);