arch/powerpc/kvm/powerpc.c

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