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         case KVM_CAP_PPC_HWRNG:
 533                 r = kvmppc_hwrng_present();
 534                 break;
 535 #endif
 536         case KVM_CAP_SYNC_MMU:
 537 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 538                 r = hv_enabled;
 539 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 540                 r = 1;
 541 #else
 542                 r = 0;
 543 #endif
 544                 break;
 545 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 546         case KVM_CAP_PPC_HTAB_FD:
 547                 r = hv_enabled;
 548                 break;
 549 #endif
 550         case KVM_CAP_NR_VCPUS:
 551                 /*
 552                  * Recommending a number of CPUs is somewhat arbitrary; we
 553                  * return the number of present CPUs for -HV (since a host
 554                  * will have secondary threads "offline"), and for other KVM
 555                  * implementations just count online CPUs.
 556                  */
 557                 if (hv_enabled)
 558                         r = num_present_cpus();
 559                 else
 560                         r = num_online_cpus();
 561                 break;
 562         case KVM_CAP_MAX_VCPUS:
 563                 r = KVM_MAX_VCPUS;
 564                 break;
 565 #ifdef CONFIG_PPC_BOOK3S_64
 566         case KVM_CAP_PPC_GET_SMMU_INFO:
 567                 r = 1;
 568                 break;
 569 #endif
 570         default:
 571                 r = 0;
 572                 break;
 573         }
 574         return r;
 575
 576 }
 577
 578 long kvm_arch_dev_ioctl(struct file *filp,
 579                         unsigned int ioctl, unsigned long arg)
 580 {
 581         return -EINVAL;
 582 }
 583
 584 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 585                            struct kvm_memory_slot *dont)
 586 {
 587         kvmppc_core_free_memslot(kvm, free, dont);
 588 }
 589
 590 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 591                             unsigned long npages)
 592 {
 593         return kvmppc_core_create_memslot(kvm, slot, npages);
 594 }
 595
 596 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 597                                    struct kvm_memory_slot *memslot,
 598                                    const struct kvm_userspace_memory_region *mem,
 599                                    enum kvm_mr_change change)
 600 {
 601         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 602 }
 603
 604 void kvm_arch_commit_memory_region(struct kvm *kvm,
 605                                    const struct kvm_userspace_memory_region *mem,
 606                                    const struct kvm_memory_slot *old,
 607                                    const struct kvm_memory_slot *new,
 608                                    enum kvm_mr_change change)
 609 {
 610         kvmppc_core_commit_memory_region(kvm, mem, old, new);
 611 }
 612
 613 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 614                                    struct kvm_memory_slot *slot)
 615 {
 616         kvmppc_core_flush_memslot(kvm, slot);
 617 }
 618
 619 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 620 {
 621         struct kvm_vcpu *vcpu;
 622         vcpu = kvmppc_core_vcpu_create(kvm, id);
 623         if (!IS_ERR(vcpu)) {
 624                 vcpu->arch.wqp = &vcpu->wq;
 625                 kvmppc_create_vcpu_debugfs(vcpu, id);
 626         }
 627         return vcpu;
 628 }
 629
 630 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 631 {
 632 }
 633
 634 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 635 {
 636         /* Make sure we're not using the vcpu anymore */
 637         hrtimer_cancel(&vcpu->arch.dec_timer);
 638
 639         kvmppc_remove_vcpu_debugfs(vcpu);
 640
 641         switch (vcpu->arch.irq_type) {
 642         case KVMPPC_IRQ_MPIC:
 643                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 644                 break;
 645         case KVMPPC_IRQ_XICS:
 646                 kvmppc_xics_free_icp(vcpu);
 647                 break;
 648         }
 649
 650         kvmppc_core_vcpu_free(vcpu);
 651 }
 652
 653 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 654 {
 655         kvm_arch_vcpu_free(vcpu);
 656 }
 657
 658 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 659 {
 660         return kvmppc_core_pending_dec(vcpu);
 661 }
 662
 663 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 664 {
 665         struct kvm_vcpu *vcpu;
 666
 667         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 668         kvmppc_decrementer_func(vcpu);
 669
 670         return HRTIMER_NORESTART;
 671 }
 672
 673 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 674 {
 675         int ret;
 676
 677         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 678         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 679         vcpu->arch.dec_expires = ~(u64)0;
 680
 681 #ifdef CONFIG_KVM_EXIT_TIMING
 682         mutex_init(&vcpu->arch.exit_timing_lock);
 683 #endif
 684         ret = kvmppc_subarch_vcpu_init(vcpu);
 685         return ret;
 686 }
 687
 688 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 689 {
 690         kvmppc_mmu_destroy(vcpu);
 691         kvmppc_subarch_vcpu_uninit(vcpu);
 692 }
 693
 694 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 695 {
 696 #ifdef CONFIG_BOOKE
 697         /*
 698          * vrsave (formerly usprg0) isn't used by Linux, but may
 699          * be used by the guest.
 700          *
 701          * On non-booke this is associated with Altivec and
 702          * is handled by code in book3s.c.
 703          */
 704         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 705 #endif
 706         kvmppc_core_vcpu_load(vcpu, cpu);
 707 }
 708
 709 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 710 {
 711         kvmppc_core_vcpu_put(vcpu);
 712 #ifdef CONFIG_BOOKE
 713         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 714 #endif
 715 }
 716
 717 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 718                                       struct kvm_run *run)
 719 {
 720         u64 uninitialized_var(gpr);
 721
 722         if (run->mmio.len > sizeof(gpr)) {
 723                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 724                 return;
 725         }
 726
 727         if (!vcpu->arch.mmio_host_swabbed) {
 728                 switch (run->mmio.len) {
 729                 case 8: gpr = *(u64 *)run->mmio.data; break;
 730                 case 4: gpr = *(u32 *)run->mmio.data; break;
 731                 case 2: gpr = *(u16 *)run->mmio.data; break;
 732                 case 1: gpr = *(u8 *)run->mmio.data; break;
 733                 }
 734         } else {
 735                 switch (run->mmio.len) {
 736                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
 737                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
 738                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
 739                 case 1: gpr = *(u8 *)run->mmio.data; break;
 740                 }
 741         }
 742
 743         if (vcpu->arch.mmio_sign_extend) {
 744                 switch (run->mmio.len) {
 745 #ifdef CONFIG_PPC64
 746                 case 4:
 747                         gpr = (s64)(s32)gpr;
 748                         break;
 749 #endif
 750                 case 2:
 751                         gpr = (s64)(s16)gpr;
 752                         break;
 753                 case 1:
 754                         gpr = (s64)(s8)gpr;
 755                         break;
 756                 }
 757         }
 758
 759         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 760
 761         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
 762         case KVM_MMIO_REG_GPR:
 763                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 764                 break;
 765         case KVM_MMIO_REG_FPR:
 766                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 767                 break;
 768 #ifdef CONFIG_PPC_BOOK3S
 769         case KVM_MMIO_REG_QPR:
 770                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 771                 break;
 772         case KVM_MMIO_REG_FQPR:
 773                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 774                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 775                 break;
 776 #endif
 777         default:
 778                 BUG();
 779         }
 780 }
 781
 782 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 783                        unsigned int rt, unsigned int bytes,
 784                        int is_default_endian)
 785 {
 786         int idx, ret;
 787         bool host_swabbed;
 788
 789         /* Pity C doesn't have a logical XOR operator */
 790         if (kvmppc_need_byteswap(vcpu)) {
 791                 host_swabbed = is_default_endian;
 792         } else {
 793                 host_swabbed = !is_default_endian;
 794         }
 795
 796         if (bytes > sizeof(run->mmio.data)) {
 797                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 798                        run->mmio.len);
 799         }
 800
 801         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 802         run->mmio.len = bytes;
 803         run->mmio.is_write = 0;
 804
 805         vcpu->arch.io_gpr = rt;
 806         vcpu->arch.mmio_host_swabbed = host_swabbed;
 807         vcpu->mmio_needed = 1;
 808         vcpu->mmio_is_write = 0;
 809         vcpu->arch.mmio_sign_extend = 0;
 810
 811         idx = srcu_read_lock(&vcpu->kvm->srcu);
 812
 813         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
 814                               bytes, &run->mmio.data);
 815
 816         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 817
 818         if (!ret) {
 819                 kvmppc_complete_mmio_load(vcpu, run);
 820                 vcpu->mmio_needed = 0;
 821                 return EMULATE_DONE;
 822         }
 823
 824         return EMULATE_DO_MMIO;
 825 }
 826 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
 827
 828 /* Same as above, but sign extends */
 829 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 830                         unsigned int rt, unsigned int bytes,
 831                         int is_default_endian)
 832 {
 833         int r;
 834
 835         vcpu->arch.mmio_sign_extend = 1;
 836         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
 837
 838         return r;
 839 }
 840
 841 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 842                         u64 val, unsigned int bytes, int is_default_endian)
 843 {
 844         void *data = run->mmio.data;
 845         int idx, ret;
 846         bool host_swabbed;
 847
 848         /* Pity C doesn't have a logical XOR operator */
 849         if (kvmppc_need_byteswap(vcpu)) {
 850                 host_swabbed = is_default_endian;
 851         } else {
 852                 host_swabbed = !is_default_endian;
 853         }
 854
 855         if (bytes > sizeof(run->mmio.data)) {
 856                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 857                        run->mmio.len);
 858         }
 859
 860         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 861         run->mmio.len = bytes;
 862         run->mmio.is_write = 1;
 863         vcpu->mmio_needed = 1;
 864         vcpu->mmio_is_write = 1;
 865
 866         /* Store the value at the lowest bytes in 'data'. */
 867         if (!host_swabbed) {
 868                 switch (bytes) {
 869                 case 8: *(u64 *)data = val; break;
 870                 case 4: *(u32 *)data = val; break;
 871                 case 2: *(u16 *)data = val; break;
 872                 case 1: *(u8  *)data = val; break;
 873                 }
 874         } else {
 875                 switch (bytes) {
 876                 case 8: *(u64 *)data = swab64(val); break;
 877                 case 4: *(u32 *)data = swab32(val); break;
 878                 case 2: *(u16 *)data = swab16(val); break;
 879                 case 1: *(u8  *)data = val; break;
 880                 }
 881         }
 882
 883         idx = srcu_read_lock(&vcpu->kvm->srcu);
 884
 885         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
 886                                bytes, &run->mmio.data);
 887
 888         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 889
 890         if (!ret) {
 891                 vcpu->mmio_needed = 0;
 892                 return EMULATE_DONE;
 893         }
 894
 895         return EMULATE_DO_MMIO;
 896 }
 897 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
 898
 899 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 900 {
 901         int r = 0;
 902         union kvmppc_one_reg val;
 903         int size;
 904
 905         size = one_reg_size(reg->id);
 906         if (size > sizeof(val))
 907                 return -EINVAL;
 908
 909         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
 910         if (r == -EINVAL) {
 911                 r = 0;
 912                 switch (reg->id) {
 913 #ifdef CONFIG_ALTIVEC
 914                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
 915                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 916                                 r = -ENXIO;
 917                                 break;
 918                         }
 919                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
 920                         break;
 921                 case KVM_REG_PPC_VSCR:
 922                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 923                                 r = -ENXIO;
 924                                 break;
 925                         }
 926                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
 927                         break;
 928                 case KVM_REG_PPC_VRSAVE:
 929                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 930                                 r = -ENXIO;
 931                                 break;
 932                         }
 933                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
 934                         break;
 935 #endif /* CONFIG_ALTIVEC */
 936                 default:
 937                         r = -EINVAL;
 938                         break;
 939                 }
 940         }
 941
 942         if (r)
 943                 return r;
 944
 945         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
 946                 r = -EFAULT;
 947
 948         return r;
 949 }
 950
 951 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 952 {
 953         int r;
 954         union kvmppc_one_reg val;
 955         int size;
 956
 957         size = one_reg_size(reg->id);
 958         if (size > sizeof(val))
 959                 return -EINVAL;
 960
 961         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
 962                 return -EFAULT;
 963
 964         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
 965         if (r == -EINVAL) {
 966                 r = 0;
 967                 switch (reg->id) {
 968 #ifdef CONFIG_ALTIVEC
 969                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
 970                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 971                                 r = -ENXIO;
 972                                 break;
 973                         }
 974                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
 975                         break;
 976                 case KVM_REG_PPC_VSCR:
 977                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 978                                 r = -ENXIO;
 979                                 break;
 980                         }
 981                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
 982                         break;
 983                 case KVM_REG_PPC_VRSAVE:
 984                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
 985                         break;
 986 #endif /* CONFIG_ALTIVEC */
 987                 default:
 988                         r = -EINVAL;
 989                         break;
 990                 }
 991         }
 992
 993         return r;
 994 }
 995
 996 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 997 {
 998         int r;
 999         sigset_t sigsaved;
1000
1001         if (vcpu->sigset_active)
1002                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
1003
1004         if (vcpu->mmio_needed) {
1005                 if (!vcpu->mmio_is_write)
1006                         kvmppc_complete_mmio_load(vcpu, run);
1007                 vcpu->mmio_needed = 0;
1008         } else if (vcpu->arch.osi_needed) {
1009                 u64 *gprs = run->osi.gprs;
1010                 int i;
1011
1012                 for (i = 0; i < 32; i++)
1013                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1014                 vcpu->arch.osi_needed = 0;
1015         } else if (vcpu->arch.hcall_needed) {
1016                 int i;
1017
1018                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1019                 for (i = 0; i < 9; ++i)
1020                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1021                 vcpu->arch.hcall_needed = 0;
1022 #ifdef CONFIG_BOOKE
1023         } else if (vcpu->arch.epr_needed) {
1024                 kvmppc_set_epr(vcpu, run->epr.epr);
1025                 vcpu->arch.epr_needed = 0;
1026 #endif
1027         }
1028
1029         r = kvmppc_vcpu_run(run, vcpu);
1030
1031         if (vcpu->sigset_active)
1032                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1033
1034         return r;
1035 }
1036
1037 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1038 {
1039         if (irq->irq == KVM_INTERRUPT_UNSET) {
1040                 kvmppc_core_dequeue_external(vcpu);
1041                 return 0;
1042         }
1043
1044         kvmppc_core_queue_external(vcpu, irq);
1045
1046         kvm_vcpu_kick(vcpu);
1047
1048         return 0;
1049 }
1050
1051 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1052                                      struct kvm_enable_cap *cap)
1053 {
1054         int r;
1055
1056         if (cap->flags)
1057                 return -EINVAL;
1058
1059         switch (cap->cap) {
1060         case KVM_CAP_PPC_OSI:
1061                 r = 0;
1062                 vcpu->arch.osi_enabled = true;
1063                 break;
1064         case KVM_CAP_PPC_PAPR:
1065                 r = 0;
1066                 vcpu->arch.papr_enabled = true;
1067                 break;
1068         case KVM_CAP_PPC_EPR:
1069                 r = 0;
1070                 if (cap->args[0])
1071                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1072                 else
1073                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1074                 break;
1075 #ifdef CONFIG_BOOKE
1076         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1077                 r = 0;
1078                 vcpu->arch.watchdog_enabled = true;
1079                 break;
1080 #endif
1081 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1082         case KVM_CAP_SW_TLB: {
1083                 struct kvm_config_tlb cfg;
1084                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1085
1086                 r = -EFAULT;
1087                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1088                         break;
1089
1090                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1091                 break;
1092         }
1093 #endif
1094 #ifdef CONFIG_KVM_MPIC
1095         case KVM_CAP_IRQ_MPIC: {
1096                 struct fd f;
1097                 struct kvm_device *dev;
1098
1099                 r = -EBADF;
1100                 f = fdget(cap->args[0]);
1101                 if (!f.file)
1102                         break;
1103
1104                 r = -EPERM;
1105                 dev = kvm_device_from_filp(f.file);
1106                 if (dev)
1107                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1108
1109                 fdput(f);
1110                 break;
1111         }
1112 #endif
1113 #ifdef CONFIG_KVM_XICS
1114         case KVM_CAP_IRQ_XICS: {
1115                 struct fd f;
1116                 struct kvm_device *dev;
1117
1118                 r = -EBADF;
1119                 f = fdget(cap->args[0]);
1120                 if (!f.file)
1121                         break;
1122
1123                 r = -EPERM;
1124                 dev = kvm_device_from_filp(f.file);
1125                 if (dev)
1126                         r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1127
1128                 fdput(f);
1129                 break;
1130         }
1131 #endif /* CONFIG_KVM_XICS */
1132         default:
1133                 r = -EINVAL;
1134                 break;
1135         }
1136
1137         if (!r)
1138                 r = kvmppc_sanity_check(vcpu);
1139
1140         return r;
1141 }
1142
1143 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1144                                     struct kvm_mp_state *mp_state)
1145 {
1146         return -EINVAL;
1147 }
1148
1149 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1150                                     struct kvm_mp_state *mp_state)
1151 {
1152         return -EINVAL;
1153 }
1154
1155 long kvm_arch_vcpu_ioctl(struct file *filp,
1156                          unsigned int ioctl, unsigned long arg)
1157 {
1158         struct kvm_vcpu *vcpu = filp->private_data;
1159         void __user *argp = (void __user *)arg;
1160         long r;
1161
1162         switch (ioctl) {
1163         case KVM_INTERRUPT: {
1164                 struct kvm_interrupt irq;
1165                 r = -EFAULT;
1166                 if (copy_from_user(&irq, argp, sizeof(irq)))
1167                         goto out;
1168                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1169                 goto out;
1170         }
1171
1172         case KVM_ENABLE_CAP:
1173         {
1174                 struct kvm_enable_cap cap;
1175                 r = -EFAULT;
1176                 if (copy_from_user(&cap, argp, sizeof(cap)))
1177                         goto out;
1178                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1179                 break;
1180         }
1181
1182         case KVM_SET_ONE_REG:
1183         case KVM_GET_ONE_REG:
1184         {
1185                 struct kvm_one_reg reg;
1186                 r = -EFAULT;
1187                 if (copy_from_user(&reg, argp, sizeof(reg)))
1188                         goto out;
1189                 if (ioctl == KVM_SET_ONE_REG)
1190                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1191                 else
1192                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1193                 break;
1194         }
1195
1196 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1197         case KVM_DIRTY_TLB: {
1198                 struct kvm_dirty_tlb dirty;
1199                 r = -EFAULT;
1200                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1201                         goto out;
1202                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1203                 break;
1204         }
1205 #endif
1206         default:
1207                 r = -EINVAL;
1208         }
1209
1210 out:
1211         return r;
1212 }
1213
1214 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1215 {
1216         return VM_FAULT_SIGBUS;
1217 }
1218
1219 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1220 {
1221         u32 inst_nop = 0x60000000;
1222 #ifdef CONFIG_KVM_BOOKE_HV
1223         u32 inst_sc1 = 0x44000022;
1224         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1225         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1226         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1227         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1228 #else
1229         u32 inst_lis = 0x3c000000;
1230         u32 inst_ori = 0x60000000;
1231         u32 inst_sc = 0x44000002;
1232         u32 inst_imm_mask = 0xffff;
1233
1234         /*
1235          * The hypercall to get into KVM from within guest context is as
1236          * follows:
1237          *
1238          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1239          *    ori r0, KVM_SC_MAGIC_R0@l
1240          *    sc
1241          *    nop
1242          */
1243         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1244         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1245         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1246         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1247 #endif
1248
1249         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1250
1251         return 0;
1252 }
1253
1254 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1255                           bool line_status)
1256 {
1257         if (!irqchip_in_kernel(kvm))
1258                 return -ENXIO;
1259
1260         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1261                                         irq_event->irq, irq_event->level,
1262                                         line_status);
1263         return 0;
1264 }
1265
1266
1267 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1268                                    struct kvm_enable_cap *cap)
1269 {
1270         int r;
1271
1272         if (cap->flags)
1273                 return -EINVAL;
1274
1275         switch (cap->cap) {
1276 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1277         case KVM_CAP_PPC_ENABLE_HCALL: {
1278                 unsigned long hcall = cap->args[0];
1279
1280                 r = -EINVAL;
1281                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1282                     cap->args[1] > 1)
1283                         break;
1284                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1285                         break;
1286                 if (cap->args[1])
1287                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1288                 else
1289                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1290                 r = 0;
1291                 break;
1292         }
1293 #endif
1294         default:
1295                 r = -EINVAL;
1296                 break;
1297         }
1298
1299         return r;
1300 }
1301
1302 long kvm_arch_vm_ioctl(struct file *filp,
1303                        unsigned int ioctl, unsigned long arg)
1304 {
1305         struct kvm *kvm __maybe_unused = filp->private_data;
1306         void __user *argp = (void __user *)arg;
1307         long r;
1308
1309         switch (ioctl) {
1310         case KVM_PPC_GET_PVINFO: {
1311                 struct kvm_ppc_pvinfo pvinfo;
1312                 memset(&pvinfo, 0, sizeof(pvinfo));
1313                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1314                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1315                         r = -EFAULT;
1316                         goto out;
1317                 }
1318
1319                 break;
1320         }
1321         case KVM_ENABLE_CAP:
1322         {
1323                 struct kvm_enable_cap cap;
1324                 r = -EFAULT;
1325                 if (copy_from_user(&cap, argp, sizeof(cap)))
1326                         goto out;
1327                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1328                 break;
1329         }
1330 #ifdef CONFIG_PPC_BOOK3S_64
1331         case KVM_CREATE_SPAPR_TCE: {
1332                 struct kvm_create_spapr_tce create_tce;
1333
1334                 r = -EFAULT;
1335                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1336                         goto out;
1337                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
1338                 goto out;
1339         }
1340         case KVM_PPC_GET_SMMU_INFO: {
1341                 struct kvm_ppc_smmu_info info;
1342                 struct kvm *kvm = filp->private_data;
1343
1344                 memset(&info, 0, sizeof(info));
1345                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1346                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1347                         r = -EFAULT;
1348                 break;
1349         }
1350         case KVM_PPC_RTAS_DEFINE_TOKEN: {
1351                 struct kvm *kvm = filp->private_data;
1352
1353                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1354                 break;
1355         }
1356         default: {
1357                 struct kvm *kvm = filp->private_data;
1358                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1359         }
1360 #else /* CONFIG_PPC_BOOK3S_64 */
1361         default:
1362                 r = -ENOTTY;
1363 #endif
1364         }
1365 out:
1366         return r;
1367 }
1368
1369 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1370 static unsigned long nr_lpids;
1371
1372 long kvmppc_alloc_lpid(void)
1373 {
1374         long lpid;
1375
1376         do {
1377                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1378                 if (lpid >= nr_lpids) {
1379                         pr_err("%s: No LPIDs free\n", __func__);
1380                         return -ENOMEM;
1381                 }
1382         } while (test_and_set_bit(lpid, lpid_inuse));
1383
1384         return lpid;
1385 }
1386 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1387
1388 void kvmppc_claim_lpid(long lpid)
1389 {
1390         set_bit(lpid, lpid_inuse);
1391 }
1392 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1393
1394 void kvmppc_free_lpid(long lpid)
1395 {
1396         clear_bit(lpid, lpid_inuse);
1397 }
1398 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1399
1400 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1401 {
1402         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1403         memset(lpid_inuse, 0, sizeof(lpid_inuse));
1404 }
1405 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1406
1407 int kvm_arch_init(void *opaque)
1408 {
1409         return 0;
1410 }
1411
1412 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);