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