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 <asm/cputable.h>
  29 #include <asm/uaccess.h>
  30 #include <asm/kvm_ppc.h>
  31 #include <asm/tlbflush.h>
  32 #include <asm/cputhreads.h>
  33 #include "timing.h"
  34 #include "../mm/mmu_decl.h"
  35
  36 #define CREATE_TRACE_POINTS
  37 #include "trace.h"
  38
  39 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  40 {
  41         return !(v->arch.shared->msr & MSR_WE) ||
  42                !!(v->arch.pending_exceptions) ||
  43                v->requests;
  44 }
  45
  46 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
  47 {
  48         int nr = kvmppc_get_gpr(vcpu, 11);
  49         int r;
  50         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
  51         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
  52         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
  53         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
  54         unsigned long r2 = 0;
  55
  56         if (!(vcpu->arch.shared->msr & MSR_SF)) {
  57                 /* 32 bit mode */
  58                 param1 &= 0xffffffff;
  59                 param2 &= 0xffffffff;
  60                 param3 &= 0xffffffff;
  61                 param4 &= 0xffffffff;
  62         }
  63
  64         switch (nr) {
  65         case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
  66         {
  67                 vcpu->arch.magic_page_pa = param1;
  68                 vcpu->arch.magic_page_ea = param2;
  69
  70                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
  71
  72                 r = HC_EV_SUCCESS;
  73                 break;
  74         }
  75         case HC_VENDOR_KVM | KVM_HC_FEATURES:
  76                 r = HC_EV_SUCCESS;
  77 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500)
  78                 /* XXX Missing magic page on 44x */
  79                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
  80 #endif
  81
  82                 /* Second return value is in r4 */
  83                 break;
  84         default:
  85                 r = HC_EV_UNIMPLEMENTED;
  86                 break;
  87         }
  88
  89         kvmppc_set_gpr(vcpu, 4, r2);
  90
  91         return r;
  92 }
  93
  94 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
  95 {
  96         int r = false;
  97
  98         /* We have to know what CPU to virtualize */
  99         if (!vcpu->arch.pvr)
 100                 goto out;
 101
 102         /* PAPR only works with book3s_64 */
 103         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 104                 goto out;
 105
 106 #ifdef CONFIG_KVM_BOOK3S_64_HV
 107         /* HV KVM can only do PAPR mode for now */
 108         if (!vcpu->arch.papr_enabled)
 109                 goto out;
 110 #endif
 111
 112         r = true;
 113
 114 out:
 115         vcpu->arch.sane = r;
 116         return r ? 0 : -EINVAL;
 117 }
 118
 119 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 120 {
 121         enum emulation_result er;
 122         int r;
 123
 124         er = kvmppc_emulate_instruction(run, vcpu);
 125         switch (er) {
 126         case EMULATE_DONE:
 127                 /* Future optimization: only reload non-volatiles if they were
 128                  * actually modified. */
 129                 r = RESUME_GUEST_NV;
 130                 break;
 131         case EMULATE_DO_MMIO:
 132                 run->exit_reason = KVM_EXIT_MMIO;
 133                 /* We must reload nonvolatiles because "update" load/store
 134                  * instructions modify register state. */
 135                 /* Future optimization: only reload non-volatiles if they were
 136                  * actually modified. */
 137                 r = RESUME_HOST_NV;
 138                 break;
 139         case EMULATE_FAIL:
 140                 /* XXX Deliver Program interrupt to guest. */
 141                 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
 142                        kvmppc_get_last_inst(vcpu));
 143                 r = RESUME_HOST;
 144                 break;
 145         default:
 146                 BUG();
 147         }
 148
 149         return r;
 150 }
 151
 152 int kvm_arch_hardware_enable(void *garbage)
 153 {
 154         return 0;
 155 }
 156
 157 void kvm_arch_hardware_disable(void *garbage)
 158 {
 159 }
 160
 161 int kvm_arch_hardware_setup(void)
 162 {
 163         return 0;
 164 }
 165
 166 void kvm_arch_hardware_unsetup(void)
 167 {
 168 }
 169
 170 void kvm_arch_check_processor_compat(void *rtn)
 171 {
 172         *(int *)rtn = kvmppc_core_check_processor_compat();
 173 }
 174
 175 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 176 {
 177         if (type)
 178                 return -EINVAL;
 179
 180         return kvmppc_core_init_vm(kvm);
 181 }
 182
 183 void kvm_arch_destroy_vm(struct kvm *kvm)
 184 {
 185         unsigned int i;
 186         struct kvm_vcpu *vcpu;
 187
 188         kvm_for_each_vcpu(i, vcpu, kvm)
 189                 kvm_arch_vcpu_free(vcpu);
 190
 191         mutex_lock(&kvm->lock);
 192         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 193                 kvm->vcpus[i] = NULL;
 194
 195         atomic_set(&kvm->online_vcpus, 0);
 196
 197         kvmppc_core_destroy_vm(kvm);
 198
 199         mutex_unlock(&kvm->lock);
 200 }
 201
 202 void kvm_arch_sync_events(struct kvm *kvm)
 203 {
 204 }
 205
 206 int kvm_dev_ioctl_check_extension(long ext)
 207 {
 208         int r;
 209
 210         switch (ext) {
 211 #ifdef CONFIG_BOOKE
 212         case KVM_CAP_PPC_BOOKE_SREGS:
 213 #else
 214         case KVM_CAP_PPC_SEGSTATE:
 215         case KVM_CAP_PPC_PAPR:
 216 #endif
 217         case KVM_CAP_PPC_UNSET_IRQ:
 218         case KVM_CAP_PPC_IRQ_LEVEL:
 219         case KVM_CAP_ENABLE_CAP:
 220                 r = 1;
 221                 break;
 222 #ifndef CONFIG_KVM_BOOK3S_64_HV
 223         case KVM_CAP_PPC_PAIRED_SINGLES:
 224         case KVM_CAP_PPC_OSI:
 225         case KVM_CAP_PPC_GET_PVINFO:
 226 #ifdef CONFIG_KVM_E500
 227         case KVM_CAP_SW_TLB:
 228 #endif
 229                 r = 1;
 230                 break;
 231         case KVM_CAP_COALESCED_MMIO:
 232                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 233                 break;
 234 #endif
 235 #ifdef CONFIG_KVM_BOOK3S_64_HV
 236         case KVM_CAP_SPAPR_TCE:
 237                 r = 1;
 238                 break;
 239         case KVM_CAP_PPC_SMT:
 240                 r = threads_per_core;
 241                 break;
 242         case KVM_CAP_PPC_RMA:
 243                 r = 1;
 244                 /* PPC970 requires an RMA */
 245                 if (cpu_has_feature(CPU_FTR_ARCH_201))
 246                         r = 2;
 247                 break;
 248 #endif
 249         default:
 250                 r = 0;
 251                 break;
 252         }
 253         return r;
 254
 255 }
 256
 257 long kvm_arch_dev_ioctl(struct file *filp,
 258                         unsigned int ioctl, unsigned long arg)
 259 {
 260         return -EINVAL;
 261 }
 262
 263 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 264                                    struct kvm_memory_slot *memslot,
 265                                    struct kvm_memory_slot old,
 266                                    struct kvm_userspace_memory_region *mem,
 267                                    int user_alloc)
 268 {
 269         return kvmppc_core_prepare_memory_region(kvm, mem);
 270 }
 271
 272 void kvm_arch_commit_memory_region(struct kvm *kvm,
 273                struct kvm_userspace_memory_region *mem,
 274                struct kvm_memory_slot old,
 275                int user_alloc)
 276 {
 277         kvmppc_core_commit_memory_region(kvm, mem);
 278 }
 279
 280
 281 void kvm_arch_flush_shadow(struct kvm *kvm)
 282 {
 283 }
 284
 285 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 286 {
 287         struct kvm_vcpu *vcpu;
 288         vcpu = kvmppc_core_vcpu_create(kvm, id);
 289         vcpu->arch.wqp = &vcpu->wq;
 290         if (!IS_ERR(vcpu))
 291                 kvmppc_create_vcpu_debugfs(vcpu, id);
 292         return vcpu;
 293 }
 294
 295 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 296 {
 297         /* Make sure we're not using the vcpu anymore */
 298         hrtimer_cancel(&vcpu->arch.dec_timer);
 299         tasklet_kill(&vcpu->arch.tasklet);
 300
 301         kvmppc_remove_vcpu_debugfs(vcpu);
 302         kvmppc_core_vcpu_free(vcpu);
 303 }
 304
 305 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 306 {
 307         kvm_arch_vcpu_free(vcpu);
 308 }
 309
 310 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 311 {
 312         return kvmppc_core_pending_dec(vcpu);
 313 }
 314
 315 /*
 316  * low level hrtimer wake routine. Because this runs in hardirq context
 317  * we schedule a tasklet to do the real work.
 318  */
 319 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 320 {
 321         struct kvm_vcpu *vcpu;
 322
 323         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 324         tasklet_schedule(&vcpu->arch.tasklet);
 325
 326         return HRTIMER_NORESTART;
 327 }
 328
 329 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 330 {
 331         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 332         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 333         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 334         vcpu->arch.dec_expires = ~(u64)0;
 335
 336 #ifdef CONFIG_KVM_EXIT_TIMING
 337         mutex_init(&vcpu->arch.exit_timing_lock);
 338 #endif
 339
 340         return 0;
 341 }
 342
 343 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 344 {
 345         kvmppc_mmu_destroy(vcpu);
 346 }
 347
 348 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 349 {
 350 #ifdef CONFIG_BOOKE
 351         /*
 352          * vrsave (formerly usprg0) isn't used by Linux, but may
 353          * be used by the guest.
 354          *
 355          * On non-booke this is associated with Altivec and
 356          * is handled by code in book3s.c.
 357          */
 358         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 359 #endif
 360         kvmppc_core_vcpu_load(vcpu, cpu);
 361         vcpu->cpu = smp_processor_id();
 362 }
 363
 364 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 365 {
 366         kvmppc_core_vcpu_put(vcpu);
 367 #ifdef CONFIG_BOOKE
 368         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 369 #endif
 370         vcpu->cpu = -1;
 371 }
 372
 373 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 374                                         struct kvm_guest_debug *dbg)
 375 {
 376         return -EINVAL;
 377 }
 378
 379 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 380                                      struct kvm_run *run)
 381 {
 382         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 383 }
 384
 385 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 386                                       struct kvm_run *run)
 387 {
 388         u64 uninitialized_var(gpr);
 389
 390         if (run->mmio.len > sizeof(gpr)) {
 391                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 392                 return;
 393         }
 394
 395         if (vcpu->arch.mmio_is_bigendian) {
 396                 switch (run->mmio.len) {
 397                 case 8: gpr = *(u64 *)run->mmio.data; break;
 398                 case 4: gpr = *(u32 *)run->mmio.data; break;
 399                 case 2: gpr = *(u16 *)run->mmio.data; break;
 400                 case 1: gpr = *(u8 *)run->mmio.data; break;
 401                 }
 402         } else {
 403                 /* Convert BE data from userland back to LE. */
 404                 switch (run->mmio.len) {
 405                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 406                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 407                 case 1: gpr = *(u8 *)run->mmio.data; break;
 408                 }
 409         }
 410
 411         if (vcpu->arch.mmio_sign_extend) {
 412                 switch (run->mmio.len) {
 413 #ifdef CONFIG_PPC64
 414                 case 4:
 415                         gpr = (s64)(s32)gpr;
 416                         break;
 417 #endif
 418                 case 2:
 419                         gpr = (s64)(s16)gpr;
 420                         break;
 421                 case 1:
 422                         gpr = (s64)(s8)gpr;
 423                         break;
 424                 }
 425         }
 426
 427         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 428
 429         switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
 430         case KVM_REG_GPR:
 431                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 432                 break;
 433         case KVM_REG_FPR:
 434                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 435                 break;
 436 #ifdef CONFIG_PPC_BOOK3S
 437         case KVM_REG_QPR:
 438                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 439                 break;
 440         case KVM_REG_FQPR:
 441                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 442                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 443                 break;
 444 #endif
 445         default:
 446                 BUG();
 447         }
 448 }
 449
 450 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 451                        unsigned int rt, unsigned int bytes, int is_bigendian)
 452 {
 453         if (bytes > sizeof(run->mmio.data)) {
 454                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 455                        run->mmio.len);
 456         }
 457
 458         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 459         run->mmio.len = bytes;
 460         run->mmio.is_write = 0;
 461
 462         vcpu->arch.io_gpr = rt;
 463         vcpu->arch.mmio_is_bigendian = is_bigendian;
 464         vcpu->mmio_needed = 1;
 465         vcpu->mmio_is_write = 0;
 466         vcpu->arch.mmio_sign_extend = 0;
 467
 468         return EMULATE_DO_MMIO;
 469 }
 470
 471 /* Same as above, but sign extends */
 472 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 473                         unsigned int rt, unsigned int bytes, int is_bigendian)
 474 {
 475         int r;
 476
 477         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
 478         vcpu->arch.mmio_sign_extend = 1;
 479
 480         return r;
 481 }
 482
 483 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 484                         u64 val, unsigned int bytes, int is_bigendian)
 485 {
 486         void *data = run->mmio.data;
 487
 488         if (bytes > sizeof(run->mmio.data)) {
 489                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 490                        run->mmio.len);
 491         }
 492
 493         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 494         run->mmio.len = bytes;
 495         run->mmio.is_write = 1;
 496         vcpu->mmio_needed = 1;
 497         vcpu->mmio_is_write = 1;
 498
 499         /* Store the value at the lowest bytes in 'data'. */
 500         if (is_bigendian) {
 501                 switch (bytes) {
 502                 case 8: *(u64 *)data = val; break;
 503                 case 4: *(u32 *)data = val; break;
 504                 case 2: *(u16 *)data = val; break;
 505                 case 1: *(u8  *)data = val; break;
 506                 }
 507         } else {
 508                 /* Store LE value into 'data'. */
 509                 switch (bytes) {
 510                 case 4: st_le32(data, val); break;
 511                 case 2: st_le16(data, val); break;
 512                 case 1: *(u8 *)data = val; break;
 513                 }
 514         }
 515
 516         return EMULATE_DO_MMIO;
 517 }
 518
 519 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 520 {
 521         int r;
 522         sigset_t sigsaved;
 523
 524         if (vcpu->sigset_active)
 525                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 526
 527         if (vcpu->mmio_needed) {
 528                 if (!vcpu->mmio_is_write)
 529                         kvmppc_complete_mmio_load(vcpu, run);
 530                 vcpu->mmio_needed = 0;
 531         } else if (vcpu->arch.dcr_needed) {
 532                 if (!vcpu->arch.dcr_is_write)
 533                         kvmppc_complete_dcr_load(vcpu, run);
 534                 vcpu->arch.dcr_needed = 0;
 535         } else if (vcpu->arch.osi_needed) {
 536                 u64 *gprs = run->osi.gprs;
 537                 int i;
 538
 539                 for (i = 0; i < 32; i++)
 540                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 541                 vcpu->arch.osi_needed = 0;
 542         } else if (vcpu->arch.hcall_needed) {
 543                 int i;
 544
 545                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 546                 for (i = 0; i < 9; ++i)
 547                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 548                 vcpu->arch.hcall_needed = 0;
 549         }
 550
 551         r = kvmppc_vcpu_run(run, vcpu);
 552
 553         if (vcpu->sigset_active)
 554                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 555
 556         return r;
 557 }
 558
 559 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
 560 {
 561         int me;
 562         int cpu = vcpu->cpu;
 563
 564         me = get_cpu();
 565         if (waitqueue_active(vcpu->arch.wqp)) {
 566                 wake_up_interruptible(vcpu->arch.wqp);
 567                 vcpu->stat.halt_wakeup++;
 568         } else if (cpu != me && cpu != -1) {
 569                 smp_send_reschedule(vcpu->cpu);
 570         }
 571         put_cpu();
 572 }
 573
 574 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 575 {
 576         if (irq->irq == KVM_INTERRUPT_UNSET) {
 577                 kvmppc_core_dequeue_external(vcpu, irq);
 578                 return 0;
 579         }
 580
 581         kvmppc_core_queue_external(vcpu, irq);
 582         kvm_vcpu_kick(vcpu);
 583
 584         return 0;
 585 }
 586
 587 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 588                                      struct kvm_enable_cap *cap)
 589 {
 590         int r;
 591
 592         if (cap->flags)
 593                 return -EINVAL;
 594
 595         switch (cap->cap) {
 596         case KVM_CAP_PPC_OSI:
 597                 r = 0;
 598                 vcpu->arch.osi_enabled = true;
 599                 break;
 600         case KVM_CAP_PPC_PAPR:
 601                 r = 0;
 602                 vcpu->arch.papr_enabled = true;
 603                 break;
 604 #ifdef CONFIG_KVM_E500
 605         case KVM_CAP_SW_TLB: {
 606                 struct kvm_config_tlb cfg;
 607                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
 608
 609                 r = -EFAULT;
 610                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
 611                         break;
 612
 613                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
 614                 break;
 615         }
 616 #endif
 617         default:
 618                 r = -EINVAL;
 619                 break;
 620         }
 621
 622         if (!r)
 623                 r = kvmppc_sanity_check(vcpu);
 624
 625         return r;
 626 }
 627
 628 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 629                                     struct kvm_mp_state *mp_state)
 630 {
 631         return -EINVAL;
 632 }
 633
 634 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 635                                     struct kvm_mp_state *mp_state)
 636 {
 637         return -EINVAL;
 638 }
 639
 640 long kvm_arch_vcpu_ioctl(struct file *filp,
 641                          unsigned int ioctl, unsigned long arg)
 642 {
 643         struct kvm_vcpu *vcpu = filp->private_data;
 644         void __user *argp = (void __user *)arg;
 645         long r;
 646
 647         switch (ioctl) {
 648         case KVM_INTERRUPT: {
 649                 struct kvm_interrupt irq;
 650                 r = -EFAULT;
 651                 if (copy_from_user(&irq, argp, sizeof(irq)))
 652                         goto out;
 653                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
 654                 goto out;
 655         }
 656
 657         case KVM_ENABLE_CAP:
 658         {
 659                 struct kvm_enable_cap cap;
 660                 r = -EFAULT;
 661                 if (copy_from_user(&cap, argp, sizeof(cap)))
 662                         goto out;
 663                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
 664                 break;
 665         }
 666
 667 #ifdef CONFIG_KVM_E500
 668         case KVM_DIRTY_TLB: {
 669                 struct kvm_dirty_tlb dirty;
 670                 r = -EFAULT;
 671                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
 672                         goto out;
 673                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
 674                 break;
 675         }
 676 #endif
 677
 678         default:
 679                 r = -EINVAL;
 680         }
 681
 682 out:
 683         return r;
 684 }
 685
 686 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
 687 {
 688         return VM_FAULT_SIGBUS;
 689 }
 690
 691 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
 692 {
 693         u32 inst_lis = 0x3c000000;
 694         u32 inst_ori = 0x60000000;
 695         u32 inst_nop = 0x60000000;
 696         u32 inst_sc = 0x44000002;
 697         u32 inst_imm_mask = 0xffff;
 698
 699         /*
 700          * The hypercall to get into KVM from within guest context is as
 701          * follows:
 702          *
 703          *    lis r0, r0, KVM_SC_MAGIC_R0@h
 704          *    ori r0, KVM_SC_MAGIC_R0@l
 705          *    sc
 706          *    nop
 707          */
 708         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
 709         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
 710         pvinfo->hcall[2] = inst_sc;
 711         pvinfo->hcall[3] = inst_nop;
 712
 713         return 0;
 714 }
 715
 716 long kvm_arch_vm_ioctl(struct file *filp,
 717                        unsigned int ioctl, unsigned long arg)
 718 {
 719         void __user *argp = (void __user *)arg;
 720         long r;
 721
 722         switch (ioctl) {
 723         case KVM_PPC_GET_PVINFO: {
 724                 struct kvm_ppc_pvinfo pvinfo;
 725                 memset(&pvinfo, 0, sizeof(pvinfo));
 726                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
 727                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
 728                         r = -EFAULT;
 729                         goto out;
 730                 }
 731
 732                 break;
 733         }
 734 #ifdef CONFIG_KVM_BOOK3S_64_HV
 735         case KVM_CREATE_SPAPR_TCE: {
 736                 struct kvm_create_spapr_tce create_tce;
 737                 struct kvm *kvm = filp->private_data;
 738
 739                 r = -EFAULT;
 740                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
 741                         goto out;
 742                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
 743                 goto out;
 744         }
 745
 746         case KVM_ALLOCATE_RMA: {
 747                 struct kvm *kvm = filp->private_data;
 748                 struct kvm_allocate_rma rma;
 749
 750                 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
 751                 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
 752                         r = -EFAULT;
 753                 break;
 754         }
 755 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 756
 757         default:
 758                 r = -ENOTTY;
 759         }
 760
 761 out:
 762         return r;
 763 }
 764
 765 int kvm_arch_init(void *opaque)
 766 {
 767         return 0;
 768 }
 769
 770 void kvm_arch_exit(void)
 771 {
 772 }