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 }
  44
  45 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
  46 {
  47         int nr = kvmppc_get_gpr(vcpu, 11);
  48         int r;
  49         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
  50         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
  51         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
  52         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
  53         unsigned long r2 = 0;
  54
  55         if (!(vcpu->arch.shared->msr & MSR_SF)) {
  56                 /* 32 bit mode */
  57                 param1 &= 0xffffffff;
  58                 param2 &= 0xffffffff;
  59                 param3 &= 0xffffffff;
  60                 param4 &= 0xffffffff;
  61         }
  62
  63         switch (nr) {
  64         case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
  65         {
  66                 vcpu->arch.magic_page_pa = param1;
  67                 vcpu->arch.magic_page_ea = param2;
  68
  69                 r2 = KVM_MAGIC_FEAT_SR;
  70
  71                 r = HC_EV_SUCCESS;
  72                 break;
  73         }
  74         case HC_VENDOR_KVM | KVM_HC_FEATURES:
  75                 r = HC_EV_SUCCESS;
  76 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500)
  77                 /* XXX Missing magic page on 44x */
  78                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
  79 #endif
  80
  81                 /* Second return value is in r4 */
  82                 break;
  83         default:
  84                 r = HC_EV_UNIMPLEMENTED;
  85                 break;
  86         }
  87
  88         kvmppc_set_gpr(vcpu, 4, r2);
  89
  90         return r;
  91 }
  92
  93 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
  94 {
  95         int r = false;
  96
  97         /* We have to know what CPU to virtualize */
  98         if (!vcpu->arch.pvr)
  99                 goto out;
 100
 101         /* PAPR only works with book3s_64 */
 102         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 103                 goto out;
 104
 105 #ifdef CONFIG_KVM_BOOK3S_64_HV
 106         /* HV KVM can only do PAPR mode for now */
 107         if (!vcpu->arch.papr_enabled)
 108                 goto out;
 109 #endif
 110
 111         r = true;
 112
 113 out:
 114         vcpu->arch.sane = r;
 115         return r ? 0 : -EINVAL;
 116 }
 117
 118 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 119 {
 120         enum emulation_result er;
 121         int r;
 122
 123         er = kvmppc_emulate_instruction(run, vcpu);
 124         switch (er) {
 125         case EMULATE_DONE:
 126                 /* Future optimization: only reload non-volatiles if they were
 127                  * actually modified. */
 128                 r = RESUME_GUEST_NV;
 129                 break;
 130         case EMULATE_DO_MMIO:
 131                 run->exit_reason = KVM_EXIT_MMIO;
 132                 /* We must reload nonvolatiles because "update" load/store
 133                  * instructions modify register state. */
 134                 /* Future optimization: only reload non-volatiles if they were
 135                  * actually modified. */
 136                 r = RESUME_HOST_NV;
 137                 break;
 138         case EMULATE_FAIL:
 139                 /* XXX Deliver Program interrupt to guest. */
 140                 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
 141                        kvmppc_get_last_inst(vcpu));
 142                 r = RESUME_HOST;
 143                 break;
 144         default:
 145                 BUG();
 146         }
 147
 148         return r;
 149 }
 150
 151 int kvm_arch_hardware_enable(void *garbage)
 152 {
 153         return 0;
 154 }
 155
 156 void kvm_arch_hardware_disable(void *garbage)
 157 {
 158 }
 159
 160 int kvm_arch_hardware_setup(void)
 161 {
 162         return 0;
 163 }
 164
 165 void kvm_arch_hardware_unsetup(void)
 166 {
 167 }
 168
 169 void kvm_arch_check_processor_compat(void *rtn)
 170 {
 171         *(int *)rtn = kvmppc_core_check_processor_compat();
 172 }
 173
 174 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 175 {
 176         if (type)
 177                 return -EINVAL;
 178
 179         return kvmppc_core_init_vm(kvm);
 180 }
 181
 182 void kvm_arch_destroy_vm(struct kvm *kvm)
 183 {
 184         unsigned int i;
 185         struct kvm_vcpu *vcpu;
 186
 187         kvm_for_each_vcpu(i, vcpu, kvm)
 188                 kvm_arch_vcpu_free(vcpu);
 189
 190         mutex_lock(&kvm->lock);
 191         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 192                 kvm->vcpus[i] = NULL;
 193
 194         atomic_set(&kvm->online_vcpus, 0);
 195
 196         kvmppc_core_destroy_vm(kvm);
 197
 198         mutex_unlock(&kvm->lock);
 199 }
 200
 201 void kvm_arch_sync_events(struct kvm *kvm)
 202 {
 203 }
 204
 205 int kvm_dev_ioctl_check_extension(long ext)
 206 {
 207         int r;
 208
 209         switch (ext) {
 210 #ifdef CONFIG_BOOKE
 211         case KVM_CAP_PPC_BOOKE_SREGS:
 212 #else
 213         case KVM_CAP_PPC_SEGSTATE:
 214         case KVM_CAP_PPC_PAPR:
 215 #endif
 216         case KVM_CAP_PPC_UNSET_IRQ:
 217         case KVM_CAP_PPC_IRQ_LEVEL:
 218         case KVM_CAP_ENABLE_CAP:
 219                 r = 1;
 220                 break;
 221 #ifndef CONFIG_KVM_BOOK3S_64_HV
 222         case KVM_CAP_PPC_PAIRED_SINGLES:
 223         case KVM_CAP_PPC_OSI:
 224         case KVM_CAP_PPC_GET_PVINFO:
 225 #ifdef CONFIG_KVM_E500
 226         case KVM_CAP_SW_TLB:
 227 #endif
 228                 r = 1;
 229                 break;
 230         case KVM_CAP_COALESCED_MMIO:
 231                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 232                 break;
 233 #endif
 234 #ifdef CONFIG_KVM_BOOK3S_64_HV
 235         case KVM_CAP_SPAPR_TCE:
 236                 r = 1;
 237                 break;
 238         case KVM_CAP_PPC_SMT:
 239                 r = threads_per_core;
 240                 break;
 241         case KVM_CAP_PPC_RMA:
 242                 r = 1;
 243                 /* PPC970 requires an RMA */
 244                 if (cpu_has_feature(CPU_FTR_ARCH_201))
 245                         r = 2;
 246                 break;
 247 #endif
 248         default:
 249                 r = 0;
 250                 break;
 251         }
 252         return r;
 253
 254 }
 255
 256 long kvm_arch_dev_ioctl(struct file *filp,
 257                         unsigned int ioctl, unsigned long arg)
 258 {
 259         return -EINVAL;
 260 }
 261
 262 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 263                                    struct kvm_memory_slot *memslot,
 264                                    struct kvm_memory_slot old,
 265                                    struct kvm_userspace_memory_region *mem,
 266                                    int user_alloc)
 267 {
 268         return kvmppc_core_prepare_memory_region(kvm, mem);
 269 }
 270
 271 void kvm_arch_commit_memory_region(struct kvm *kvm,
 272                struct kvm_userspace_memory_region *mem,
 273                struct kvm_memory_slot old,
 274                int user_alloc)
 275 {
 276         kvmppc_core_commit_memory_region(kvm, mem);
 277 }
 278
 279
 280 void kvm_arch_flush_shadow(struct kvm *kvm)
 281 {
 282 }
 283
 284 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 285 {
 286         struct kvm_vcpu *vcpu;
 287         vcpu = kvmppc_core_vcpu_create(kvm, id);
 288         vcpu->arch.wqp = &vcpu->wq;
 289         if (!IS_ERR(vcpu))
 290                 kvmppc_create_vcpu_debugfs(vcpu, id);
 291         return vcpu;
 292 }
 293
 294 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 295 {
 296         /* Make sure we're not using the vcpu anymore */
 297         hrtimer_cancel(&vcpu->arch.dec_timer);
 298         tasklet_kill(&vcpu->arch.tasklet);
 299
 300         kvmppc_remove_vcpu_debugfs(vcpu);
 301         kvmppc_core_vcpu_free(vcpu);
 302 }
 303
 304 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 305 {
 306         kvm_arch_vcpu_free(vcpu);
 307 }
 308
 309 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 310 {
 311         return kvmppc_core_pending_dec(vcpu);
 312 }
 313
 314 static void kvmppc_decrementer_func(unsigned long data)
 315 {
 316         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
 317
 318         kvmppc_core_queue_dec(vcpu);
 319
 320         if (waitqueue_active(vcpu->arch.wqp)) {
 321                 wake_up_interruptible(vcpu->arch.wqp);
 322                 vcpu->stat.halt_wakeup++;
 323         }
 324 }
 325
 326 /*
 327  * low level hrtimer wake routine. Because this runs in hardirq context
 328  * we schedule a tasklet to do the real work.
 329  */
 330 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 331 {
 332         struct kvm_vcpu *vcpu;
 333
 334         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 335         tasklet_schedule(&vcpu->arch.tasklet);
 336
 337         return HRTIMER_NORESTART;
 338 }
 339
 340 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 341 {
 342         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 343         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 344         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 345         vcpu->arch.dec_expires = ~(u64)0;
 346
 347 #ifdef CONFIG_KVM_EXIT_TIMING
 348         mutex_init(&vcpu->arch.exit_timing_lock);
 349 #endif
 350
 351         return 0;
 352 }
 353
 354 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 355 {
 356         kvmppc_mmu_destroy(vcpu);
 357 }
 358
 359 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 360 {
 361 #ifdef CONFIG_BOOKE
 362         /*
 363          * vrsave (formerly usprg0) isn't used by Linux, but may
 364          * be used by the guest.
 365          *
 366          * On non-booke this is associated with Altivec and
 367          * is handled by code in book3s.c.
 368          */
 369         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 370 #endif
 371         kvmppc_core_vcpu_load(vcpu, cpu);
 372         vcpu->cpu = smp_processor_id();
 373 }
 374
 375 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 376 {
 377         kvmppc_core_vcpu_put(vcpu);
 378 #ifdef CONFIG_BOOKE
 379         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 380 #endif
 381         vcpu->cpu = -1;
 382 }
 383
 384 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 385                                         struct kvm_guest_debug *dbg)
 386 {
 387         return -EINVAL;
 388 }
 389
 390 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 391                                      struct kvm_run *run)
 392 {
 393         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 394 }
 395
 396 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 397                                       struct kvm_run *run)
 398 {
 399         u64 uninitialized_var(gpr);
 400
 401         if (run->mmio.len > sizeof(gpr)) {
 402                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 403                 return;
 404         }
 405
 406         if (vcpu->arch.mmio_is_bigendian) {
 407                 switch (run->mmio.len) {
 408                 case 8: gpr = *(u64 *)run->mmio.data; break;
 409                 case 4: gpr = *(u32 *)run->mmio.data; break;
 410                 case 2: gpr = *(u16 *)run->mmio.data; break;
 411                 case 1: gpr = *(u8 *)run->mmio.data; break;
 412                 }
 413         } else {
 414                 /* Convert BE data from userland back to LE. */
 415                 switch (run->mmio.len) {
 416                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 417                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 418                 case 1: gpr = *(u8 *)run->mmio.data; break;
 419                 }
 420         }
 421
 422         if (vcpu->arch.mmio_sign_extend) {
 423                 switch (run->mmio.len) {
 424 #ifdef CONFIG_PPC64
 425                 case 4:
 426                         gpr = (s64)(s32)gpr;
 427                         break;
 428 #endif
 429                 case 2:
 430                         gpr = (s64)(s16)gpr;
 431                         break;
 432                 case 1:
 433                         gpr = (s64)(s8)gpr;
 434                         break;
 435                 }
 436         }
 437
 438         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 439
 440         switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
 441         case KVM_REG_GPR:
 442                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 443                 break;
 444         case KVM_REG_FPR:
 445                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 446                 break;
 447 #ifdef CONFIG_PPC_BOOK3S
 448         case KVM_REG_QPR:
 449                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 450                 break;
 451         case KVM_REG_FQPR:
 452                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 453                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 454                 break;
 455 #endif
 456         default:
 457                 BUG();
 458         }
 459 }
 460
 461 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 462                        unsigned int rt, unsigned int bytes, int is_bigendian)
 463 {
 464         if (bytes > sizeof(run->mmio.data)) {
 465                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 466                        run->mmio.len);
 467         }
 468
 469         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 470         run->mmio.len = bytes;
 471         run->mmio.is_write = 0;
 472
 473         vcpu->arch.io_gpr = rt;
 474         vcpu->arch.mmio_is_bigendian = is_bigendian;
 475         vcpu->mmio_needed = 1;
 476         vcpu->mmio_is_write = 0;
 477         vcpu->arch.mmio_sign_extend = 0;
 478
 479         return EMULATE_DO_MMIO;
 480 }
 481
 482 /* Same as above, but sign extends */
 483 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 484                         unsigned int rt, unsigned int bytes, int is_bigendian)
 485 {
 486         int r;
 487
 488         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
 489         vcpu->arch.mmio_sign_extend = 1;
 490
 491         return r;
 492 }
 493
 494 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 495                         u64 val, unsigned int bytes, int is_bigendian)
 496 {
 497         void *data = run->mmio.data;
 498
 499         if (bytes > sizeof(run->mmio.data)) {
 500                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 501                        run->mmio.len);
 502         }
 503
 504         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 505         run->mmio.len = bytes;
 506         run->mmio.is_write = 1;
 507         vcpu->mmio_needed = 1;
 508         vcpu->mmio_is_write = 1;
 509
 510         /* Store the value at the lowest bytes in 'data'. */
 511         if (is_bigendian) {
 512                 switch (bytes) {
 513                 case 8: *(u64 *)data = val; break;
 514                 case 4: *(u32 *)data = val; break;
 515                 case 2: *(u16 *)data = val; break;
 516                 case 1: *(u8  *)data = val; break;
 517                 }
 518         } else {
 519                 /* Store LE value into 'data'. */
 520                 switch (bytes) {
 521                 case 4: st_le32(data, val); break;
 522                 case 2: st_le16(data, val); break;
 523                 case 1: *(u8 *)data = val; break;
 524                 }
 525         }
 526
 527         return EMULATE_DO_MMIO;
 528 }
 529
 530 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 531 {
 532         int r;
 533         sigset_t sigsaved;
 534
 535         if (vcpu->sigset_active)
 536                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 537
 538         if (vcpu->mmio_needed) {
 539                 if (!vcpu->mmio_is_write)
 540                         kvmppc_complete_mmio_load(vcpu, run);
 541                 vcpu->mmio_needed = 0;
 542         } else if (vcpu->arch.dcr_needed) {
 543                 if (!vcpu->arch.dcr_is_write)
 544                         kvmppc_complete_dcr_load(vcpu, run);
 545                 vcpu->arch.dcr_needed = 0;
 546         } else if (vcpu->arch.osi_needed) {
 547                 u64 *gprs = run->osi.gprs;
 548                 int i;
 549
 550                 for (i = 0; i < 32; i++)
 551                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 552                 vcpu->arch.osi_needed = 0;
 553         } else if (vcpu->arch.hcall_needed) {
 554                 int i;
 555
 556                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 557                 for (i = 0; i < 9; ++i)
 558                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 559                 vcpu->arch.hcall_needed = 0;
 560         }
 561
 562         kvmppc_core_deliver_interrupts(vcpu);
 563
 564         r = kvmppc_vcpu_run(run, vcpu);
 565
 566         if (vcpu->sigset_active)
 567                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 568
 569         return r;
 570 }
 571
 572 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 573 {
 574         if (irq->irq == KVM_INTERRUPT_UNSET) {
 575                 kvmppc_core_dequeue_external(vcpu, irq);
 576                 return 0;
 577         }
 578
 579         kvmppc_core_queue_external(vcpu, irq);
 580
 581         if (waitqueue_active(vcpu->arch.wqp)) {
 582                 wake_up_interruptible(vcpu->arch.wqp);
 583                 vcpu->stat.halt_wakeup++;
 584         } else if (vcpu->cpu != -1) {
 585                 smp_send_reschedule(vcpu->cpu);
 586         }
 587
 588         return 0;
 589 }
 590
 591 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 592                                      struct kvm_enable_cap *cap)
 593 {
 594         int r;
 595
 596         if (cap->flags)
 597                 return -EINVAL;
 598
 599         switch (cap->cap) {
 600         case KVM_CAP_PPC_OSI:
 601                 r = 0;
 602                 vcpu->arch.osi_enabled = true;
 603                 break;
 604         case KVM_CAP_PPC_PAPR:
 605                 r = 0;
 606                 vcpu->arch.papr_enabled = true;
 607                 break;
 608 #ifdef CONFIG_KVM_E500
 609         case KVM_CAP_SW_TLB: {
 610                 struct kvm_config_tlb cfg;
 611                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
 612
 613                 r = -EFAULT;
 614                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
 615                         break;
 616
 617                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
 618                 break;
 619         }
 620 #endif
 621         default:
 622                 r = -EINVAL;
 623                 break;
 624         }
 625
 626         if (!r)
 627                 r = kvmppc_sanity_check(vcpu);
 628
 629         return r;
 630 }
 631
 632 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 633                                     struct kvm_mp_state *mp_state)
 634 {
 635         return -EINVAL;
 636 }
 637
 638 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 639                                     struct kvm_mp_state *mp_state)
 640 {
 641         return -EINVAL;
 642 }
 643
 644 long kvm_arch_vcpu_ioctl(struct file *filp,
 645                          unsigned int ioctl, unsigned long arg)
 646 {
 647         struct kvm_vcpu *vcpu = filp->private_data;
 648         void __user *argp = (void __user *)arg;
 649         long r;
 650
 651         switch (ioctl) {
 652         case KVM_INTERRUPT: {
 653                 struct kvm_interrupt irq;
 654                 r = -EFAULT;
 655                 if (copy_from_user(&irq, argp, sizeof(irq)))
 656                         goto out;
 657                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
 658                 goto out;
 659         }
 660
 661         case KVM_ENABLE_CAP:
 662         {
 663                 struct kvm_enable_cap cap;
 664                 r = -EFAULT;
 665                 if (copy_from_user(&cap, argp, sizeof(cap)))
 666                         goto out;
 667                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
 668                 break;
 669         }
 670
 671 #ifdef CONFIG_KVM_E500
 672         case KVM_DIRTY_TLB: {
 673                 struct kvm_dirty_tlb dirty;
 674                 r = -EFAULT;
 675                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
 676                         goto out;
 677                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
 678                 break;
 679         }
 680 #endif
 681
 682         default:
 683                 r = -EINVAL;
 684         }
 685
 686 out:
 687         return r;
 688 }
 689
 690 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
 691 {
 692         return VM_FAULT_SIGBUS;
 693 }
 694
 695 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
 696 {
 697         u32 inst_lis = 0x3c000000;
 698         u32 inst_ori = 0x60000000;
 699         u32 inst_nop = 0x60000000;
 700         u32 inst_sc = 0x44000002;
 701         u32 inst_imm_mask = 0xffff;
 702
 703         /*
 704          * The hypercall to get into KVM from within guest context is as
 705          * follows:
 706          *
 707          *    lis r0, r0, KVM_SC_MAGIC_R0@h
 708          *    ori r0, KVM_SC_MAGIC_R0@l
 709          *    sc
 710          *    nop
 711          */
 712         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
 713         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
 714         pvinfo->hcall[2] = inst_sc;
 715         pvinfo->hcall[3] = inst_nop;
 716
 717         return 0;
 718 }
 719
 720 long kvm_arch_vm_ioctl(struct file *filp,
 721                        unsigned int ioctl, unsigned long arg)
 722 {
 723         void __user *argp = (void __user *)arg;
 724         long r;
 725
 726         switch (ioctl) {
 727         case KVM_PPC_GET_PVINFO: {
 728                 struct kvm_ppc_pvinfo pvinfo;
 729                 memset(&pvinfo, 0, sizeof(pvinfo));
 730                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
 731                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
 732                         r = -EFAULT;
 733                         goto out;
 734                 }
 735
 736                 break;
 737         }
 738 #ifdef CONFIG_KVM_BOOK3S_64_HV
 739         case KVM_CREATE_SPAPR_TCE: {
 740                 struct kvm_create_spapr_tce create_tce;
 741                 struct kvm *kvm = filp->private_data;
 742
 743                 r = -EFAULT;
 744                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
 745                         goto out;
 746                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
 747                 goto out;
 748         }
 749
 750         case KVM_ALLOCATE_RMA: {
 751                 struct kvm *kvm = filp->private_data;
 752                 struct kvm_allocate_rma rma;
 753
 754                 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
 755                 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
 756                         r = -EFAULT;
 757                 break;
 758         }
 759 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 760
 761         default:
 762                 r = -ENOTTY;
 763         }
 764
 765 out:
 766         return r;
 767 }
 768
 769 int kvm_arch_init(void *opaque)
 770 {
 771         return 0;
 772 }
 773
 774 void kvm_arch_exit(void)
 775 {
 776 }