arch/powerpc/kvm/powerpc.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License, version 2, as
   4  * published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public License
  12  * along with this program; if not, write to the Free Software
  13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14  *
  15  * Copyright IBM Corp. 2007
  16  *
  17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
  19  */
  20
  21 #include <linux/errno.h>
  22 #include <linux/err.h>
  23 #include <linux/kvm_host.h>
  24 #include <linux/vmalloc.h>
  25 #include <linux/hrtimer.h>
  26 #include <linux/fs.h>
  27 #include <linux/slab.h>
  28 #include <linux/file.h>
  29 #include <linux/module.h>
  30 #include <asm/cputable.h>
  31 #include <asm/uaccess.h>
  32 #include <asm/kvm_ppc.h>
  33 #include <asm/tlbflush.h>
  34 #include <asm/cputhreads.h>
  35 #include <asm/irqflags.h>
  36 #include <asm/iommu.h>
  37 #include "timing.h"
  38 #include "irq.h"
  39 #include "../mm/mmu_decl.h"
  40
  41 #define CREATE_TRACE_POINTS
  42 #include "trace.h"
  43
  44 struct kvmppc_ops *kvmppc_hv_ops;
  45 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
  46 struct kvmppc_ops *kvmppc_pr_ops;
  47 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
  48
  49
  50 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  51 {
  52         return !!(v->arch.pending_exceptions) ||
  53                v->requests;
  54 }
  55
  56 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  57 {
  58         return 1;
  59 }
  60
  61 /*
  62  * Common checks before entering the guest world.  Call with interrupts
  63  * disabled.
  64  *
  65  * returns:
  66  *
  67  * == 1 if we're ready to go into guest state
  68  * <= 0 if we need to go back to the host with return value
  69  */
  70 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
  71 {
  72         int r;
  73
  74         WARN_ON(irqs_disabled());
  75         hard_irq_disable();
  76
  77         while (true) {
  78                 if (need_resched()) {
  79                         local_irq_enable();
  80                         cond_resched();
  81                         hard_irq_disable();
  82                         continue;
  83                 }
  84
  85                 if (signal_pending(current)) {
  86                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
  87                         vcpu->run->exit_reason = KVM_EXIT_INTR;
  88                         r = -EINTR;
  89                         break;
  90                 }
  91
  92                 vcpu->mode = IN_GUEST_MODE;
  93
  94                 /*
  95                  * Reading vcpu->requests must happen after setting vcpu->mode,
  96                  * so we don't miss a request because the requester sees
  97                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
  98                  * before next entering the guest (and thus doesn't IPI).
  99                  * This also orders the write to mode from any reads
 100                  * to the page tables done while the VCPU is running.
 101                  * Please see the comment in kvm_flush_remote_tlbs.
 102                  */
 103                 smp_mb();
 104
 105                 if (vcpu->requests) {
 106                         /* Make sure we process requests preemptable */
 107                         local_irq_enable();
 108                         trace_kvm_check_requests(vcpu);
 109                         r = kvmppc_core_check_requests(vcpu);
 110                         hard_irq_disable();
 111                         if (r > 0)
 112                                 continue;
 113                         break;
 114                 }
 115
 116                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 117                         /* interrupts got enabled in between, so we
 118                            are back at square 1 */
 119                         continue;
 120                 }
 121
 122                 __kvm_guest_enter();
 123                 return 1;
 124         }
 125
 126         /* return to host */
 127         local_irq_enable();
 128         return r;
 129 }
 130 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
 131
 132 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 133 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
 134 {
 135         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
 136         int i;
 137
 138         shared->sprg0 = swab64(shared->sprg0);
 139         shared->sprg1 = swab64(shared->sprg1);
 140         shared->sprg2 = swab64(shared->sprg2);
 141         shared->sprg3 = swab64(shared->sprg3);
 142         shared->srr0 = swab64(shared->srr0);
 143         shared->srr1 = swab64(shared->srr1);
 144         shared->dar = swab64(shared->dar);
 145         shared->msr = swab64(shared->msr);
 146         shared->dsisr = swab32(shared->dsisr);
 147         shared->int_pending = swab32(shared->int_pending);
 148         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
 149                 shared->sr[i] = swab32(shared->sr[i]);
 150 }
 151 #endif
 152
 153 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
 154 {
 155         int nr = kvmppc_get_gpr(vcpu, 11);
 156         int r;
 157         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
 158         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
 159         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
 160         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
 161         unsigned long r2 = 0;
 162
 163         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 164                 /* 32 bit mode */
 165                 param1 &= 0xffffffff;
 166                 param2 &= 0xffffffff;
 167                 param3 &= 0xffffffff;
 168                 param4 &= 0xffffffff;
 169         }
 170
 171         switch (nr) {
 172         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
 173         {
 174 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 175                 /* Book3S can be little endian, find it out here */
 176                 int shared_big_endian = true;
 177                 if (vcpu->arch.intr_msr & MSR_LE)
 178                         shared_big_endian = false;
 179                 if (shared_big_endian != vcpu->arch.shared_big_endian)
 180                         kvmppc_swab_shared(vcpu);
 181                 vcpu->arch.shared_big_endian = shared_big_endian;
 182 #endif
 183
 184                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
 185                         /*
 186                          * Older versions of the Linux magic page code had
 187                          * a bug where they would map their trampoline code
 188                          * NX. If that's the case, remove !PR NX capability.
 189                          */
 190                         vcpu->arch.disable_kernel_nx = true;
 191                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 192                 }
 193
 194                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
 195                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
 196
 197 #ifdef CONFIG_PPC_64K_PAGES
 198                 /*
 199                  * Make sure our 4k magic page is in the same window of a 64k
 200                  * page within the guest and within the host's page.
 201                  */
 202                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
 203                     ((ulong)vcpu->arch.shared & 0xf000)) {
 204                         void *old_shared = vcpu->arch.shared;
 205                         ulong shared = (ulong)vcpu->arch.shared;
 206                         void *new_shared;
 207
 208                         shared &= PAGE_MASK;
 209                         shared |= vcpu->arch.magic_page_pa & 0xf000;
 210                         new_shared = (void*)shared;
 211                         memcpy(new_shared, old_shared, 0x1000);
 212                         vcpu->arch.shared = new_shared;
 213                 }
 214 #endif
 215
 216                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
 217
 218                 r = EV_SUCCESS;
 219                 break;
 220         }
 221         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
 222                 r = EV_SUCCESS;
 223 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
 224                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
 225 #endif
 226
 227                 /* Second return value is in r4 */
 228                 break;
 229         case EV_HCALL_TOKEN(EV_IDLE):
 230                 r = EV_SUCCESS;
 231                 kvm_vcpu_block(vcpu);
 232                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 233                 break;
 234         default:
 235                 r = EV_UNIMPLEMENTED;
 236                 break;
 237         }
 238
 239         kvmppc_set_gpr(vcpu, 4, r2);
 240
 241         return r;
 242 }
 243 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
 244
 245 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 246 {
 247         int r = false;
 248
 249         /* We have to know what CPU to virtualize */
 250         if (!vcpu->arch.pvr)
 251                 goto out;
 252
 253         /* PAPR only works with book3s_64 */
 254         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 255                 goto out;
 256
 257         /* HV KVM can only do PAPR mode for now */
 258         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
 259                 goto out;
 260
 261 #ifdef CONFIG_KVM_BOOKE_HV
 262         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 263                 goto out;
 264 #endif
 265
 266         r = true;
 267
 268 out:
 269         vcpu->arch.sane = r;
 270         return r ? 0 : -EINVAL;
 271 }
 272 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
 273
 274 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 275 {
 276         enum emulation_result er;
 277         int r;
 278
 279         er = kvmppc_emulate_loadstore(vcpu);
 280         switch (er) {
 281         case EMULATE_DONE:
 282                 /* Future optimization: only reload non-volatiles if they were
 283                  * actually modified. */
 284                 r = RESUME_GUEST_NV;
 285                 break;
 286         case EMULATE_AGAIN:
 287                 r = RESUME_GUEST;
 288                 break;
 289         case EMULATE_DO_MMIO:
 290                 run->exit_reason = KVM_EXIT_MMIO;
 291                 /* We must reload nonvolatiles because "update" load/store
 292                  * instructions modify register state. */
 293                 /* Future optimization: only reload non-volatiles if they were
 294                  * actually modified. */
 295                 r = RESUME_HOST_NV;
 296                 break;
 297         case EMULATE_FAIL:
 298         {
 299                 u32 last_inst;
 300
 301                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
 302                 /* XXX Deliver Program interrupt to guest. */
 303                 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
 304                 r = RESUME_HOST;
 305                 break;
 306         }
 307         default:
 308                 WARN_ON(1);
 309                 r = RESUME_GUEST;
 310         }
 311
 312         return r;
 313 }
 314 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
 315
 316 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 317               bool data)
 318 {
 319         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 320         struct kvmppc_pte pte;
 321         int r;
 322
 323         vcpu->stat.st++;
 324
 325         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 326                          XLATE_WRITE, &pte);
 327         if (r < 0)
 328                 return r;
 329
 330         *eaddr = pte.raddr;
 331
 332         if (!pte.may_write)
 333                 return -EPERM;
 334
 335         /* Magic page override */
 336         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 337             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 338             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 339                 void *magic = vcpu->arch.shared;
 340                 magic += pte.eaddr & 0xfff;
 341                 memcpy(magic, ptr, size);
 342                 return EMULATE_DONE;
 343         }
 344
 345         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 346                 return EMULATE_DO_MMIO;
 347
 348         return EMULATE_DONE;
 349 }
 350 EXPORT_SYMBOL_GPL(kvmppc_st);
 351
 352 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 353                       bool data)
 354 {
 355         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 356         struct kvmppc_pte pte;
 357         int rc;
 358
 359         vcpu->stat.ld++;
 360
 361         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 362                           XLATE_READ, &pte);
 363         if (rc)
 364                 return rc;
 365
 366         *eaddr = pte.raddr;
 367
 368         if (!pte.may_read)
 369                 return -EPERM;
 370
 371         if (!data && !pte.may_execute)
 372                 return -ENOEXEC;
 373
 374         /* Magic page override */
 375         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 376             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 377             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 378                 void *magic = vcpu->arch.shared;
 379                 magic += pte.eaddr & 0xfff;
 380                 memcpy(ptr, magic, size);
 381                 return EMULATE_DONE;
 382         }
 383
 384         if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
 385                 return EMULATE_DO_MMIO;
 386
 387         return EMULATE_DONE;
 388 }
 389 EXPORT_SYMBOL_GPL(kvmppc_ld);
 390
 391 int kvm_arch_hardware_enable(void)
 392 {
 393         return 0;
 394 }
 395
 396 int kvm_arch_hardware_setup(void)
 397 {
 398         return 0;
 399 }
 400
 401 void kvm_arch_check_processor_compat(void *rtn)
 402 {
 403         *(int *)rtn = kvmppc_core_check_processor_compat();
 404 }
 405
 406 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 407 {
 408         struct kvmppc_ops *kvm_ops = NULL;
 409         /*
 410          * if we have both HV and PR enabled, default is HV
 411          */
 412         if (type == 0) {
 413                 if (kvmppc_hv_ops)
 414                         kvm_ops = kvmppc_hv_ops;
 415                 else
 416                         kvm_ops = kvmppc_pr_ops;
 417                 if (!kvm_ops)
 418                         goto err_out;
 419         } else  if (type == KVM_VM_PPC_HV) {
 420                 if (!kvmppc_hv_ops)
 421                         goto err_out;
 422                 kvm_ops = kvmppc_hv_ops;
 423         } else if (type == KVM_VM_PPC_PR) {
 424                 if (!kvmppc_pr_ops)
 425                         goto err_out;
 426                 kvm_ops = kvmppc_pr_ops;
 427         } else
 428                 goto err_out;
 429
 430         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
 431                 return -ENOENT;
 432
 433         kvm->arch.kvm_ops = kvm_ops;
 434         return kvmppc_core_init_vm(kvm);
 435 err_out:
 436         return -EINVAL;
 437 }
 438
 439 void kvm_arch_destroy_vm(struct kvm *kvm)
 440 {
 441         unsigned int i;
 442         struct kvm_vcpu *vcpu;
 443
 444 #ifdef CONFIG_KVM_XICS
 445         /*
 446          * We call kick_all_cpus_sync() to ensure that all
 447          * CPUs have executed any pending IPIs before we
 448          * continue and free VCPUs structures below.
 449          */
 450         if (is_kvmppc_hv_enabled(kvm))
 451                 kick_all_cpus_sync();
 452 #endif
 453
 454         kvm_for_each_vcpu(i, vcpu, kvm)
 455                 kvm_arch_vcpu_free(vcpu);
 456
 457         mutex_lock(&kvm->lock);
 458         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 459                 kvm->vcpus[i] = NULL;
 460
 461         atomic_set(&kvm->online_vcpus, 0);
 462
 463         kvmppc_core_destroy_vm(kvm);
 464
 465         mutex_unlock(&kvm->lock);
 466
 467         /* drop the module reference */
 468         module_put(kvm->arch.kvm_ops->owner);
 469 }
 470
 471 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 472 {
 473         int r;
 474         /* Assume we're using HV mode when the HV module is loaded */
 475         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 476
 477         if (kvm) {
 478                 /*
 479                  * Hooray - we know which VM type we're running on. Depend on
 480                  * that rather than the guess above.
 481                  */
 482                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 483         }
 484
 485         switch (ext) {
 486 #ifdef CONFIG_BOOKE
 487         case KVM_CAP_PPC_BOOKE_SREGS:
 488         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 489         case KVM_CAP_PPC_EPR:
 490 #else
 491         case KVM_CAP_PPC_SEGSTATE:
 492         case KVM_CAP_PPC_HIOR:
 493         case KVM_CAP_PPC_PAPR:
 494 #endif
 495         case KVM_CAP_PPC_UNSET_IRQ:
 496         case KVM_CAP_PPC_IRQ_LEVEL:
 497         case KVM_CAP_ENABLE_CAP:
 498         case KVM_CAP_ENABLE_CAP_VM:
 499         case KVM_CAP_ONE_REG:
 500         case KVM_CAP_IOEVENTFD:
 501         case KVM_CAP_DEVICE_CTRL:
 502                 r = 1;
 503                 break;
 504         case KVM_CAP_PPC_PAIRED_SINGLES:
 505         case KVM_CAP_PPC_OSI:
 506         case KVM_CAP_PPC_GET_PVINFO:
 507 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 508         case KVM_CAP_SW_TLB:
 509 #endif
 510                 /* We support this only for PR */
 511                 r = !hv_enabled;
 512                 break;
 513 #ifdef CONFIG_KVM_MMIO
 514         case KVM_CAP_COALESCED_MMIO:
 515                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 516                 break;
 517 #endif
 518 #ifdef CONFIG_KVM_MPIC
 519         case KVM_CAP_IRQ_MPIC:
 520                 r = 1;
 521                 break;
 522 #endif
 523
 524 #ifdef CONFIG_PPC_BOOK3S_64
 525         case KVM_CAP_SPAPR_TCE:
 526         case KVM_CAP_SPAPR_TCE_64:
 527         case KVM_CAP_PPC_ALLOC_HTAB:
 528         case KVM_CAP_PPC_RTAS:
 529         case KVM_CAP_PPC_FIXUP_HCALL:
 530         case KVM_CAP_PPC_ENABLE_HCALL:
 531 #ifdef CONFIG_KVM_XICS
 532         case KVM_CAP_IRQ_XICS:
 533 #endif
 534                 r = 1;
 535                 break;
 536 #endif /* CONFIG_PPC_BOOK3S_64 */
 537 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 538         case KVM_CAP_PPC_SMT:
 539                 if (hv_enabled)
 540                         r = threads_per_subcore;
 541                 else
 542                         r = 0;
 543                 break;
 544         case KVM_CAP_PPC_RMA:
 545                 r = 0;
 546                 break;
 547         case KVM_CAP_PPC_HWRNG:
 548                 r = kvmppc_hwrng_present();
 549                 break;
 550 #endif
 551         case KVM_CAP_SYNC_MMU:
 552 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 553                 r = hv_enabled;
 554 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 555                 r = 1;
 556 #else
 557                 r = 0;
 558 #endif
 559                 break;
 560 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 561         case KVM_CAP_PPC_HTAB_FD:
 562                 r = hv_enabled;
 563                 break;
 564 #endif
 565         case KVM_CAP_NR_VCPUS:
 566                 /*
 567                  * Recommending a number of CPUs is somewhat arbitrary; we
 568                  * return the number of present CPUs for -HV (since a host
 569                  * will have secondary threads "offline"), and for other KVM
 570                  * implementations just count online CPUs.
 571                  */
 572                 if (hv_enabled)
 573                         r = num_present_cpus();
 574                 else
 575                         r = num_online_cpus();
 576                 break;
 577         case KVM_CAP_NR_MEMSLOTS:
 578                 r = KVM_USER_MEM_SLOTS;
 579                 break;
 580         case KVM_CAP_MAX_VCPUS:
 581                 r = KVM_MAX_VCPUS;
 582                 break;
 583 #ifdef CONFIG_PPC_BOOK3S_64
 584         case KVM_CAP_PPC_GET_SMMU_INFO:
 585                 r = 1;
 586                 break;
 587         case KVM_CAP_SPAPR_MULTITCE:
 588                 r = 1;
 589                 break;
 590 #endif
 591         default:
 592                 r = 0;
 593                 break;
 594         }
 595         return r;
 596
 597 }
 598
 599 long kvm_arch_dev_ioctl(struct file *filp,
 600                         unsigned int ioctl, unsigned long arg)
 601 {
 602         return -EINVAL;
 603 }
 604
 605 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 606                            struct kvm_memory_slot *dont)
 607 {
 608         kvmppc_core_free_memslot(kvm, free, dont);
 609 }
 610
 611 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 612                             unsigned long npages)
 613 {
 614         return kvmppc_core_create_memslot(kvm, slot, npages);
 615 }
 616
 617 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 618                                    struct kvm_memory_slot *memslot,
 619                                    const struct kvm_userspace_memory_region *mem,
 620                                    enum kvm_mr_change change)
 621 {
 622         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 623 }
 624
 625 void kvm_arch_commit_memory_region(struct kvm *kvm,
 626                                    const struct kvm_userspace_memory_region *mem,
 627                                    const struct kvm_memory_slot *old,
 628                                    const struct kvm_memory_slot *new,
 629                                    enum kvm_mr_change change)
 630 {
 631         kvmppc_core_commit_memory_region(kvm, mem, old, new);
 632 }
 633
 634 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 635                                    struct kvm_memory_slot *slot)
 636 {
 637         kvmppc_core_flush_memslot(kvm, slot);
 638 }
 639
 640 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 641 {
 642         struct kvm_vcpu *vcpu;
 643         vcpu = kvmppc_core_vcpu_create(kvm, id);
 644         if (!IS_ERR(vcpu)) {
 645                 vcpu->arch.wqp = &vcpu->wq;
 646                 kvmppc_create_vcpu_debugfs(vcpu, id);
 647         }
 648         return vcpu;
 649 }
 650
 651 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 652 {
 653 }
 654
 655 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 656 {
 657         /* Make sure we're not using the vcpu anymore */
 658         hrtimer_cancel(&vcpu->arch.dec_timer);
 659
 660         kvmppc_remove_vcpu_debugfs(vcpu);
 661
 662         switch (vcpu->arch.irq_type) {
 663         case KVMPPC_IRQ_MPIC:
 664                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 665                 break;
 666         case KVMPPC_IRQ_XICS:
 667                 kvmppc_xics_free_icp(vcpu);
 668                 break;
 669         }
 670
 671         kvmppc_core_vcpu_free(vcpu);
 672 }
 673
 674 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 675 {
 676         kvm_arch_vcpu_free(vcpu);
 677 }
 678
 679 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 680 {
 681         return kvmppc_core_pending_dec(vcpu);
 682 }
 683
 684 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 685 {
 686         struct kvm_vcpu *vcpu;
 687
 688         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 689         kvmppc_decrementer_func(vcpu);
 690
 691         return HRTIMER_NORESTART;
 692 }
 693
 694 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 695 {
 696         int ret;
 697
 698         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 699         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 700         vcpu->arch.dec_expires = ~(u64)0;
 701
 702 #ifdef CONFIG_KVM_EXIT_TIMING
 703         mutex_init(&vcpu->arch.exit_timing_lock);
 704 #endif
 705         ret = kvmppc_subarch_vcpu_init(vcpu);
 706         return ret;
 707 }
 708
 709 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 710 {
 711         kvmppc_mmu_destroy(vcpu);
 712         kvmppc_subarch_vcpu_uninit(vcpu);
 713 }
 714
 715 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 716 {
 717 #ifdef CONFIG_BOOKE
 718         /*
 719          * vrsave (formerly usprg0) isn't used by Linux, but may
 720          * be used by the guest.
 721          *
 722          * On non-booke this is associated with Altivec and
 723          * is handled by code in book3s.c.
 724          */
 725         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 726 #endif
 727         kvmppc_core_vcpu_load(vcpu, cpu);
 728 }
 729
 730 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 731 {
 732         kvmppc_core_vcpu_put(vcpu);
 733 #ifdef CONFIG_BOOKE
 734         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 735 #endif
 736 }
 737
 738 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 739                                       struct kvm_run *run)
 740 {
 741         u64 uninitialized_var(gpr);
 742
 743         if (run->mmio.len > sizeof(gpr)) {
 744                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 745                 return;
 746         }
 747
 748         if (!vcpu->arch.mmio_host_swabbed) {
 749                 switch (run->mmio.len) {
 750                 case 8: gpr = *(u64 *)run->mmio.data; break;
 751                 case 4: gpr = *(u32 *)run->mmio.data; break;
 752                 case 2: gpr = *(u16 *)run->mmio.data; break;
 753                 case 1: gpr = *(u8 *)run->mmio.data; break;
 754                 }
 755         } else {
 756                 switch (run->mmio.len) {
 757                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
 758                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
 759                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
 760                 case 1: gpr = *(u8 *)run->mmio.data; break;
 761                 }
 762         }
 763
 764         if (vcpu->arch.mmio_sign_extend) {
 765                 switch (run->mmio.len) {
 766 #ifdef CONFIG_PPC64
 767                 case 4:
 768                         gpr = (s64)(s32)gpr;
 769                         break;
 770 #endif
 771                 case 2:
 772                         gpr = (s64)(s16)gpr;
 773                         break;
 774                 case 1:
 775                         gpr = (s64)(s8)gpr;
 776                         break;
 777                 }
 778         }
 779
 780         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 781
 782         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
 783         case KVM_MMIO_REG_GPR:
 784                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 785                 break;
 786         case KVM_MMIO_REG_FPR:
 787                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 788                 break;
 789 #ifdef CONFIG_PPC_BOOK3S
 790         case KVM_MMIO_REG_QPR:
 791                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 792                 break;
 793         case KVM_MMIO_REG_FQPR:
 794                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 795                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 796                 break;
 797 #endif
 798         default:
 799                 BUG();
 800         }
 801 }
 802
 803 static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 804                                 unsigned int rt, unsigned int bytes,
 805                                 int is_default_endian, int sign_extend)
 806 {
 807         int idx, ret;
 808         bool host_swabbed;
 809
 810         /* Pity C doesn't have a logical XOR operator */
 811         if (kvmppc_need_byteswap(vcpu)) {
 812                 host_swabbed = is_default_endian;
 813         } else {
 814                 host_swabbed = !is_default_endian;
 815         }
 816
 817         if (bytes > sizeof(run->mmio.data)) {
 818                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 819                        run->mmio.len);
 820         }
 821
 822         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 823         run->mmio.len = bytes;
 824         run->mmio.is_write = 0;
 825
 826         vcpu->arch.io_gpr = rt;
 827         vcpu->arch.mmio_host_swabbed = host_swabbed;
 828         vcpu->mmio_needed = 1;
 829         vcpu->mmio_is_write = 0;
 830         vcpu->arch.mmio_sign_extend = sign_extend;
 831
 832         idx = srcu_read_lock(&vcpu->kvm->srcu);
 833
 834         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
 835                               bytes, &run->mmio.data);
 836
 837         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 838
 839         if (!ret) {
 840                 kvmppc_complete_mmio_load(vcpu, run);
 841                 vcpu->mmio_needed = 0;
 842                 return EMULATE_DONE;
 843         }
 844
 845         return EMULATE_DO_MMIO;
 846 }
 847
 848 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 849                        unsigned int rt, unsigned int bytes,
 850                        int is_default_endian)
 851 {
 852         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0);
 853 }
 854 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
 855
 856 /* Same as above, but sign extends */
 857 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 858                         unsigned int rt, unsigned int bytes,
 859                         int is_default_endian)
 860 {
 861         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
 862 }
 863
 864 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 865                         u64 val, unsigned int bytes, int is_default_endian)
 866 {
 867         void *data = run->mmio.data;
 868         int idx, ret;
 869         bool host_swabbed;
 870
 871         /* Pity C doesn't have a logical XOR operator */
 872         if (kvmppc_need_byteswap(vcpu)) {
 873                 host_swabbed = is_default_endian;
 874         } else {
 875                 host_swabbed = !is_default_endian;
 876         }
 877
 878         if (bytes > sizeof(run->mmio.data)) {
 879                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 880                        run->mmio.len);
 881         }
 882
 883         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 884         run->mmio.len = bytes;
 885         run->mmio.is_write = 1;
 886         vcpu->mmio_needed = 1;
 887         vcpu->mmio_is_write = 1;
 888
 889         /* Store the value at the lowest bytes in 'data'. */
 890         if (!host_swabbed) {
 891                 switch (bytes) {
 892                 case 8: *(u64 *)data = val; break;
 893                 case 4: *(u32 *)data = val; break;
 894                 case 2: *(u16 *)data = val; break;
 895                 case 1: *(u8  *)data = val; break;
 896                 }
 897         } else {
 898                 switch (bytes) {
 899                 case 8: *(u64 *)data = swab64(val); break;
 900                 case 4: *(u32 *)data = swab32(val); break;
 901                 case 2: *(u16 *)data = swab16(val); break;
 902                 case 1: *(u8  *)data = val; break;
 903                 }
 904         }
 905
 906         idx = srcu_read_lock(&vcpu->kvm->srcu);
 907
 908         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
 909                                bytes, &run->mmio.data);
 910
 911         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 912
 913         if (!ret) {
 914                 vcpu->mmio_needed = 0;
 915                 return EMULATE_DONE;
 916         }
 917
 918         return EMULATE_DO_MMIO;
 919 }
 920 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
 921
 922 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 923 {
 924         int r = 0;
 925         union kvmppc_one_reg val;
 926         int size;
 927
 928         size = one_reg_size(reg->id);
 929         if (size > sizeof(val))
 930                 return -EINVAL;
 931
 932         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
 933         if (r == -EINVAL) {
 934                 r = 0;
 935                 switch (reg->id) {
 936 #ifdef CONFIG_ALTIVEC
 937                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
 938                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 939                                 r = -ENXIO;
 940                                 break;
 941                         }
 942                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
 943                         break;
 944                 case KVM_REG_PPC_VSCR:
 945                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 946                                 r = -ENXIO;
 947                                 break;
 948                         }
 949                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
 950                         break;
 951                 case KVM_REG_PPC_VRSAVE:
 952                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
 953                         break;
 954 #endif /* CONFIG_ALTIVEC */
 955                 default:
 956                         r = -EINVAL;
 957                         break;
 958                 }
 959         }
 960
 961         if (r)
 962                 return r;
 963
 964         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
 965                 r = -EFAULT;
 966
 967         return r;
 968 }
 969
 970 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 971 {
 972         int r;
 973         union kvmppc_one_reg val;
 974         int size;
 975
 976         size = one_reg_size(reg->id);
 977         if (size > sizeof(val))
 978                 return -EINVAL;
 979
 980         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
 981                 return -EFAULT;
 982
 983         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
 984         if (r == -EINVAL) {
 985                 r = 0;
 986                 switch (reg->id) {
 987 #ifdef CONFIG_ALTIVEC
 988                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
 989                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 990                                 r = -ENXIO;
 991                                 break;
 992                         }
 993                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
 994                         break;
 995                 case KVM_REG_PPC_VSCR:
 996                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 997                                 r = -ENXIO;
 998                                 break;
 999                         }
1000                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1001                         break;
1002                 case KVM_REG_PPC_VRSAVE:
1003                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1004                                 r = -ENXIO;
1005                                 break;
1006                         }
1007                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
1008                         break;
1009 #endif /* CONFIG_ALTIVEC */
1010                 default:
1011                         r = -EINVAL;
1012                         break;
1013                 }
1014         }
1015
1016         return r;
1017 }
1018
1019 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
1020 {
1021         int r;
1022         sigset_t sigsaved;
1023
1024         if (vcpu->sigset_active)
1025                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
1026
1027         if (vcpu->mmio_needed) {
1028                 if (!vcpu->mmio_is_write)
1029                         kvmppc_complete_mmio_load(vcpu, run);
1030                 vcpu->mmio_needed = 0;
1031         } else if (vcpu->arch.osi_needed) {
1032                 u64 *gprs = run->osi.gprs;
1033                 int i;
1034
1035                 for (i = 0; i < 32; i++)
1036                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1037                 vcpu->arch.osi_needed = 0;
1038         } else if (vcpu->arch.hcall_needed) {
1039                 int i;
1040
1041                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1042                 for (i = 0; i < 9; ++i)
1043                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1044                 vcpu->arch.hcall_needed = 0;
1045 #ifdef CONFIG_BOOKE
1046         } else if (vcpu->arch.epr_needed) {
1047                 kvmppc_set_epr(vcpu, run->epr.epr);
1048                 vcpu->arch.epr_needed = 0;
1049 #endif
1050         }
1051
1052         r = kvmppc_vcpu_run(run, vcpu);
1053
1054         if (vcpu->sigset_active)
1055                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1056
1057         return r;
1058 }
1059
1060 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1061 {
1062         if (irq->irq == KVM_INTERRUPT_UNSET) {
1063                 kvmppc_core_dequeue_external(vcpu);
1064                 return 0;
1065         }
1066
1067         kvmppc_core_queue_external(vcpu, irq);
1068
1069         kvm_vcpu_kick(vcpu);
1070
1071         return 0;
1072 }
1073
1074 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1075                                      struct kvm_enable_cap *cap)
1076 {
1077         int r;
1078
1079         if (cap->flags)
1080                 return -EINVAL;
1081
1082         switch (cap->cap) {
1083         case KVM_CAP_PPC_OSI:
1084                 r = 0;
1085                 vcpu->arch.osi_enabled = true;
1086                 break;
1087         case KVM_CAP_PPC_PAPR:
1088                 r = 0;
1089                 vcpu->arch.papr_enabled = true;
1090                 break;
1091         case KVM_CAP_PPC_EPR:
1092                 r = 0;
1093                 if (cap->args[0])
1094                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1095                 else
1096                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1097                 break;
1098 #ifdef CONFIG_BOOKE
1099         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1100                 r = 0;
1101                 vcpu->arch.watchdog_enabled = true;
1102                 break;
1103 #endif
1104 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1105         case KVM_CAP_SW_TLB: {
1106                 struct kvm_config_tlb cfg;
1107                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1108
1109                 r = -EFAULT;
1110                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1111                         break;
1112
1113                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1114                 break;
1115         }
1116 #endif
1117 #ifdef CONFIG_KVM_MPIC
1118         case KVM_CAP_IRQ_MPIC: {
1119                 struct fd f;
1120                 struct kvm_device *dev;
1121
1122                 r = -EBADF;
1123                 f = fdget(cap->args[0]);
1124                 if (!f.file)
1125                         break;
1126
1127                 r = -EPERM;
1128                 dev = kvm_device_from_filp(f.file);
1129                 if (dev)
1130                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1131
1132                 fdput(f);
1133                 break;
1134         }
1135 #endif
1136 #ifdef CONFIG_KVM_XICS
1137         case KVM_CAP_IRQ_XICS: {
1138                 struct fd f;
1139                 struct kvm_device *dev;
1140
1141                 r = -EBADF;
1142                 f = fdget(cap->args[0]);
1143                 if (!f.file)
1144                         break;
1145
1146                 r = -EPERM;
1147                 dev = kvm_device_from_filp(f.file);
1148                 if (dev)
1149                         r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1150
1151                 fdput(f);
1152                 break;
1153         }
1154 #endif /* CONFIG_KVM_XICS */
1155         default:
1156                 r = -EINVAL;
1157                 break;
1158         }
1159
1160         if (!r)
1161                 r = kvmppc_sanity_check(vcpu);
1162
1163         return r;
1164 }
1165
1166 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1167                                     struct kvm_mp_state *mp_state)
1168 {
1169         return -EINVAL;
1170 }
1171
1172 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1173                                     struct kvm_mp_state *mp_state)
1174 {
1175         return -EINVAL;
1176 }
1177
1178 long kvm_arch_vcpu_ioctl(struct file *filp,
1179                          unsigned int ioctl, unsigned long arg)
1180 {
1181         struct kvm_vcpu *vcpu = filp->private_data;
1182         void __user *argp = (void __user *)arg;
1183         long r;
1184
1185         switch (ioctl) {
1186         case KVM_INTERRUPT: {
1187                 struct kvm_interrupt irq;
1188                 r = -EFAULT;
1189                 if (copy_from_user(&irq, argp, sizeof(irq)))
1190                         goto out;
1191                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1192                 goto out;
1193         }
1194
1195         case KVM_ENABLE_CAP:
1196         {
1197                 struct kvm_enable_cap cap;
1198                 r = -EFAULT;
1199                 if (copy_from_user(&cap, argp, sizeof(cap)))
1200                         goto out;
1201                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1202                 break;
1203         }
1204
1205         case KVM_SET_ONE_REG:
1206         case KVM_GET_ONE_REG:
1207         {
1208                 struct kvm_one_reg reg;
1209                 r = -EFAULT;
1210                 if (copy_from_user(&reg, argp, sizeof(reg)))
1211                         goto out;
1212                 if (ioctl == KVM_SET_ONE_REG)
1213                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1214                 else
1215                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1216                 break;
1217         }
1218
1219 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1220         case KVM_DIRTY_TLB: {
1221                 struct kvm_dirty_tlb dirty;
1222                 r = -EFAULT;
1223                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1224                         goto out;
1225                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1226                 break;
1227         }
1228 #endif
1229         default:
1230                 r = -EINVAL;
1231         }
1232
1233 out:
1234         return r;
1235 }
1236
1237 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1238 {
1239         return VM_FAULT_SIGBUS;
1240 }
1241
1242 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1243 {
1244         u32 inst_nop = 0x60000000;
1245 #ifdef CONFIG_KVM_BOOKE_HV
1246         u32 inst_sc1 = 0x44000022;
1247         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1248         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1249         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1250         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1251 #else
1252         u32 inst_lis = 0x3c000000;
1253         u32 inst_ori = 0x60000000;
1254         u32 inst_sc = 0x44000002;
1255         u32 inst_imm_mask = 0xffff;
1256
1257         /*
1258          * The hypercall to get into KVM from within guest context is as
1259          * follows:
1260          *
1261          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1262          *    ori r0, KVM_SC_MAGIC_R0@l
1263          *    sc
1264          *    nop
1265          */
1266         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1267         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1268         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1269         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1270 #endif
1271
1272         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1273
1274         return 0;
1275 }
1276
1277 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1278                           bool line_status)
1279 {
1280         if (!irqchip_in_kernel(kvm))
1281                 return -ENXIO;
1282
1283         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1284                                         irq_event->irq, irq_event->level,
1285                                         line_status);
1286         return 0;
1287 }
1288
1289
1290 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1291                                    struct kvm_enable_cap *cap)
1292 {
1293         int r;
1294
1295         if (cap->flags)
1296                 return -EINVAL;
1297
1298         switch (cap->cap) {
1299 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1300         case KVM_CAP_PPC_ENABLE_HCALL: {
1301                 unsigned long hcall = cap->args[0];
1302
1303                 r = -EINVAL;
1304                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1305                     cap->args[1] > 1)
1306                         break;
1307                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1308                         break;
1309                 if (cap->args[1])
1310                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1311                 else
1312                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1313                 r = 0;
1314                 break;
1315         }
1316 #endif
1317         default:
1318                 r = -EINVAL;
1319                 break;
1320         }
1321
1322         return r;
1323 }
1324
1325 long kvm_arch_vm_ioctl(struct file *filp,
1326                        unsigned int ioctl, unsigned long arg)
1327 {
1328         struct kvm *kvm __maybe_unused = filp->private_data;
1329         void __user *argp = (void __user *)arg;
1330         long r;
1331
1332         switch (ioctl) {
1333         case KVM_PPC_GET_PVINFO: {
1334                 struct kvm_ppc_pvinfo pvinfo;
1335                 memset(&pvinfo, 0, sizeof(pvinfo));
1336                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1337                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1338                         r = -EFAULT;
1339                         goto out;
1340                 }
1341
1342                 break;
1343         }
1344         case KVM_ENABLE_CAP:
1345         {
1346                 struct kvm_enable_cap cap;
1347                 r = -EFAULT;
1348                 if (copy_from_user(&cap, argp, sizeof(cap)))
1349                         goto out;
1350                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1351                 break;
1352         }
1353 #ifdef CONFIG_PPC_BOOK3S_64
1354         case KVM_CREATE_SPAPR_TCE_64: {
1355                 struct kvm_create_spapr_tce_64 create_tce_64;
1356
1357                 r = -EFAULT;
1358                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
1359                         goto out;
1360                 if (create_tce_64.flags) {
1361                         r = -EINVAL;
1362                         goto out;
1363                 }
1364                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1365                 goto out;
1366         }
1367         case KVM_CREATE_SPAPR_TCE: {
1368                 struct kvm_create_spapr_tce create_tce;
1369                 struct kvm_create_spapr_tce_64 create_tce_64;
1370
1371                 r = -EFAULT;
1372                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1373                         goto out;
1374
1375                 create_tce_64.liobn = create_tce.liobn;
1376                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
1377                 create_tce_64.offset = 0;
1378                 create_tce_64.size = create_tce.window_size >>
1379                                 IOMMU_PAGE_SHIFT_4K;
1380                 create_tce_64.flags = 0;
1381                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1382                 goto out;
1383         }
1384         case KVM_PPC_GET_SMMU_INFO: {
1385                 struct kvm_ppc_smmu_info info;
1386                 struct kvm *kvm = filp->private_data;
1387
1388                 memset(&info, 0, sizeof(info));
1389                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1390                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1391                         r = -EFAULT;
1392                 break;
1393         }
1394         case KVM_PPC_RTAS_DEFINE_TOKEN: {
1395                 struct kvm *kvm = filp->private_data;
1396
1397                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1398                 break;
1399         }
1400         default: {
1401                 struct kvm *kvm = filp->private_data;
1402                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1403         }
1404 #else /* CONFIG_PPC_BOOK3S_64 */
1405         default:
1406                 r = -ENOTTY;
1407 #endif
1408         }
1409 out:
1410         return r;
1411 }
1412
1413 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1414 static unsigned long nr_lpids;
1415
1416 long kvmppc_alloc_lpid(void)
1417 {
1418         long lpid;
1419
1420         do {
1421                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1422                 if (lpid >= nr_lpids) {
1423                         pr_err("%s: No LPIDs free\n", __func__);
1424                         return -ENOMEM;
1425                 }
1426         } while (test_and_set_bit(lpid, lpid_inuse));
1427
1428         return lpid;
1429 }
1430 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1431
1432 void kvmppc_claim_lpid(long lpid)
1433 {
1434         set_bit(lpid, lpid_inuse);
1435 }
1436 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1437
1438 void kvmppc_free_lpid(long lpid)
1439 {
1440         clear_bit(lpid, lpid_inuse);
1441 }
1442 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1443
1444 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1445 {
1446         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1447         memset(lpid_inuse, 0, sizeof(lpid_inuse));
1448 }
1449 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1450
1451 int kvm_arch_init(void *opaque)
1452 {
1453         return 0;
1454 }
1455
1456 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);