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_HIOR:
 216         case KVM_CAP_PPC_PAPR:
 217 #endif
 218         case KVM_CAP_PPC_UNSET_IRQ:
 219         case KVM_CAP_PPC_IRQ_LEVEL:
 220         case KVM_CAP_ENABLE_CAP:
 221         case KVM_CAP_ONE_REG:
 222                 r = 1;
 223                 break;
 224 #ifndef CONFIG_KVM_BOOK3S_64_HV
 225         case KVM_CAP_PPC_PAIRED_SINGLES:
 226         case KVM_CAP_PPC_OSI:
 227         case KVM_CAP_PPC_GET_PVINFO:
 228 #ifdef CONFIG_KVM_E500
 229         case KVM_CAP_SW_TLB:
 230 #endif
 231                 r = 1;
 232                 break;
 233         case KVM_CAP_COALESCED_MMIO:
 234                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 235                 break;
 236 #endif
 237 #ifdef CONFIG_KVM_BOOK3S_64_HV
 238         case KVM_CAP_SPAPR_TCE:
 239                 r = 1;
 240                 break;
 241         case KVM_CAP_PPC_SMT:
 242                 r = threads_per_core;
 243                 break;
 244         case KVM_CAP_PPC_RMA:
 245                 r = 1;
 246                 /* PPC970 requires an RMA */
 247                 if (cpu_has_feature(CPU_FTR_ARCH_201))
 248                         r = 2;
 249                 break;
 250         case KVM_CAP_SYNC_MMU:
 251                 r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
 252                 break;
 253 #endif
 254         case KVM_CAP_NR_VCPUS:
 255                 /*
 256                  * Recommending a number of CPUs is somewhat arbitrary; we
 257                  * return the number of present CPUs for -HV (since a host
 258                  * will have secondary threads "offline"), and for other KVM
 259                  * implementations just count online CPUs.
 260                  */
 261 #ifdef CONFIG_KVM_BOOK3S_64_HV
 262                 r = num_present_cpus();
 263 #else
 264                 r = num_online_cpus();
 265 #endif
 266                 break;
 267         case KVM_CAP_MAX_VCPUS:
 268                 r = KVM_MAX_VCPUS;
 269                 break;
 270         default:
 271                 r = 0;
 272                 break;
 273         }
 274         return r;
 275
 276 }
 277
 278 long kvm_arch_dev_ioctl(struct file *filp,
 279                         unsigned int ioctl, unsigned long arg)
 280 {
 281         return -EINVAL;
 282 }
 283
 284 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
 285                            struct kvm_memory_slot *dont)
 286 {
 287 }
 288
 289 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
 290 {
 291         return 0;
 292 }
 293
 294 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 295                                    struct kvm_memory_slot *memslot,
 296                                    struct kvm_memory_slot old,
 297                                    struct kvm_userspace_memory_region *mem,
 298                                    int user_alloc)
 299 {
 300         return kvmppc_core_prepare_memory_region(kvm, mem);
 301 }
 302
 303 void kvm_arch_commit_memory_region(struct kvm *kvm,
 304                struct kvm_userspace_memory_region *mem,
 305                struct kvm_memory_slot old,
 306                int user_alloc)
 307 {
 308         kvmppc_core_commit_memory_region(kvm, mem);
 309 }
 310
 311
 312 void kvm_arch_flush_shadow(struct kvm *kvm)
 313 {
 314 }
 315
 316 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 317 {
 318         struct kvm_vcpu *vcpu;
 319         vcpu = kvmppc_core_vcpu_create(kvm, id);
 320         if (!IS_ERR(vcpu)) {
 321                 vcpu->arch.wqp = &vcpu->wq;
 322                 kvmppc_create_vcpu_debugfs(vcpu, id);
 323         }
 324         return vcpu;
 325 }
 326
 327 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 328 {
 329         /* Make sure we're not using the vcpu anymore */
 330         hrtimer_cancel(&vcpu->arch.dec_timer);
 331         tasklet_kill(&vcpu->arch.tasklet);
 332
 333         kvmppc_remove_vcpu_debugfs(vcpu);
 334         kvmppc_core_vcpu_free(vcpu);
 335 }
 336
 337 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 338 {
 339         kvm_arch_vcpu_free(vcpu);
 340 }
 341
 342 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 343 {
 344         return kvmppc_core_pending_dec(vcpu);
 345 }
 346
 347 /*
 348  * low level hrtimer wake routine. Because this runs in hardirq context
 349  * we schedule a tasklet to do the real work.
 350  */
 351 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 352 {
 353         struct kvm_vcpu *vcpu;
 354
 355         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 356         tasklet_schedule(&vcpu->arch.tasklet);
 357
 358         return HRTIMER_NORESTART;
 359 }
 360
 361 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 362 {
 363         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 364         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 365         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 366         vcpu->arch.dec_expires = ~(u64)0;
 367
 368 #ifdef CONFIG_KVM_EXIT_TIMING
 369         mutex_init(&vcpu->arch.exit_timing_lock);
 370 #endif
 371
 372         return 0;
 373 }
 374
 375 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 376 {
 377         kvmppc_mmu_destroy(vcpu);
 378 }
 379
 380 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 381 {
 382 #ifdef CONFIG_BOOKE
 383         /*
 384          * vrsave (formerly usprg0) isn't used by Linux, but may
 385          * be used by the guest.
 386          *
 387          * On non-booke this is associated with Altivec and
 388          * is handled by code in book3s.c.
 389          */
 390         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 391 #endif
 392         kvmppc_core_vcpu_load(vcpu, cpu);
 393         vcpu->cpu = smp_processor_id();
 394 }
 395
 396 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 397 {
 398         kvmppc_core_vcpu_put(vcpu);
 399 #ifdef CONFIG_BOOKE
 400         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 401 #endif
 402         vcpu->cpu = -1;
 403 }
 404
 405 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 406                                         struct kvm_guest_debug *dbg)
 407 {
 408         return -EINVAL;
 409 }
 410
 411 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 412                                      struct kvm_run *run)
 413 {
 414         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 415 }
 416
 417 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 418                                       struct kvm_run *run)
 419 {
 420         u64 uninitialized_var(gpr);
 421
 422         if (run->mmio.len > sizeof(gpr)) {
 423                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 424                 return;
 425         }
 426
 427         if (vcpu->arch.mmio_is_bigendian) {
 428                 switch (run->mmio.len) {
 429                 case 8: gpr = *(u64 *)run->mmio.data; break;
 430                 case 4: gpr = *(u32 *)run->mmio.data; break;
 431                 case 2: gpr = *(u16 *)run->mmio.data; break;
 432                 case 1: gpr = *(u8 *)run->mmio.data; break;
 433                 }
 434         } else {
 435                 /* Convert BE data from userland back to LE. */
 436                 switch (run->mmio.len) {
 437                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 438                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 439                 case 1: gpr = *(u8 *)run->mmio.data; break;
 440                 }
 441         }
 442
 443         if (vcpu->arch.mmio_sign_extend) {
 444                 switch (run->mmio.len) {
 445 #ifdef CONFIG_PPC64
 446                 case 4:
 447                         gpr = (s64)(s32)gpr;
 448                         break;
 449 #endif
 450                 case 2:
 451                         gpr = (s64)(s16)gpr;
 452                         break;
 453                 case 1:
 454                         gpr = (s64)(s8)gpr;
 455                         break;
 456                 }
 457         }
 458
 459         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 460
 461         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
 462         case KVM_MMIO_REG_GPR:
 463                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 464                 break;
 465         case KVM_MMIO_REG_FPR:
 466                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 467                 break;
 468 #ifdef CONFIG_PPC_BOOK3S
 469         case KVM_MMIO_REG_QPR:
 470                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 471                 break;
 472         case KVM_MMIO_REG_FQPR:
 473                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 474                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 475                 break;
 476 #endif
 477         default:
 478                 BUG();
 479         }
 480 }
 481
 482 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 483                        unsigned int rt, unsigned int bytes, int is_bigendian)
 484 {
 485         if (bytes > sizeof(run->mmio.data)) {
 486                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 487                        run->mmio.len);
 488         }
 489
 490         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 491         run->mmio.len = bytes;
 492         run->mmio.is_write = 0;
 493
 494         vcpu->arch.io_gpr = rt;
 495         vcpu->arch.mmio_is_bigendian = is_bigendian;
 496         vcpu->mmio_needed = 1;
 497         vcpu->mmio_is_write = 0;
 498         vcpu->arch.mmio_sign_extend = 0;
 499
 500         return EMULATE_DO_MMIO;
 501 }
 502
 503 /* Same as above, but sign extends */
 504 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 505                         unsigned int rt, unsigned int bytes, int is_bigendian)
 506 {
 507         int r;
 508
 509         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
 510         vcpu->arch.mmio_sign_extend = 1;
 511
 512         return r;
 513 }
 514
 515 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 516                         u64 val, unsigned int bytes, int is_bigendian)
 517 {
 518         void *data = run->mmio.data;
 519
 520         if (bytes > sizeof(run->mmio.data)) {
 521                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 522                        run->mmio.len);
 523         }
 524
 525         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 526         run->mmio.len = bytes;
 527         run->mmio.is_write = 1;
 528         vcpu->mmio_needed = 1;
 529         vcpu->mmio_is_write = 1;
 530
 531         /* Store the value at the lowest bytes in 'data'. */
 532         if (is_bigendian) {
 533                 switch (bytes) {
 534                 case 8: *(u64 *)data = val; break;
 535                 case 4: *(u32 *)data = val; break;
 536                 case 2: *(u16 *)data = val; break;
 537                 case 1: *(u8  *)data = val; break;
 538                 }
 539         } else {
 540                 /* Store LE value into 'data'. */
 541                 switch (bytes) {
 542                 case 4: st_le32(data, val); break;
 543                 case 2: st_le16(data, val); break;
 544                 case 1: *(u8 *)data = val; break;
 545                 }
 546         }
 547
 548         return EMULATE_DO_MMIO;
 549 }
 550
 551 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 552 {
 553         int r;
 554         sigset_t sigsaved;
 555
 556         if (vcpu->sigset_active)
 557                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 558
 559         if (vcpu->mmio_needed) {
 560                 if (!vcpu->mmio_is_write)
 561                         kvmppc_complete_mmio_load(vcpu, run);
 562                 vcpu->mmio_needed = 0;
 563         } else if (vcpu->arch.dcr_needed) {
 564                 if (!vcpu->arch.dcr_is_write)
 565                         kvmppc_complete_dcr_load(vcpu, run);
 566                 vcpu->arch.dcr_needed = 0;
 567         } else if (vcpu->arch.osi_needed) {
 568                 u64 *gprs = run->osi.gprs;
 569                 int i;
 570
 571                 for (i = 0; i < 32; i++)
 572                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 573                 vcpu->arch.osi_needed = 0;
 574         } else if (vcpu->arch.hcall_needed) {
 575                 int i;
 576
 577                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 578                 for (i = 0; i < 9; ++i)
 579                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 580                 vcpu->arch.hcall_needed = 0;
 581         }
 582
 583         r = kvmppc_vcpu_run(run, vcpu);
 584
 585         if (vcpu->sigset_active)
 586                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 587
 588         return r;
 589 }
 590
 591 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
 592 {
 593         int me;
 594         int cpu = vcpu->cpu;
 595
 596         me = get_cpu();
 597         if (waitqueue_active(vcpu->arch.wqp)) {
 598                 wake_up_interruptible(vcpu->arch.wqp);
 599                 vcpu->stat.halt_wakeup++;
 600         } else if (cpu != me && cpu != -1) {
 601                 smp_send_reschedule(vcpu->cpu);
 602         }
 603         put_cpu();
 604 }
 605
 606 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 607 {
 608         if (irq->irq == KVM_INTERRUPT_UNSET) {
 609                 kvmppc_core_dequeue_external(vcpu, irq);
 610                 return 0;
 611         }
 612
 613         kvmppc_core_queue_external(vcpu, irq);
 614         kvm_vcpu_kick(vcpu);
 615
 616         return 0;
 617 }
 618
 619 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 620                                      struct kvm_enable_cap *cap)
 621 {
 622         int r;
 623
 624         if (cap->flags)
 625                 return -EINVAL;
 626
 627         switch (cap->cap) {
 628         case KVM_CAP_PPC_OSI:
 629                 r = 0;
 630                 vcpu->arch.osi_enabled = true;
 631                 break;
 632         case KVM_CAP_PPC_PAPR:
 633                 r = 0;
 634                 vcpu->arch.papr_enabled = true;
 635                 break;
 636 #ifdef CONFIG_KVM_E500
 637         case KVM_CAP_SW_TLB: {
 638                 struct kvm_config_tlb cfg;
 639                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
 640
 641                 r = -EFAULT;
 642                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
 643                         break;
 644
 645                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
 646                 break;
 647         }
 648 #endif
 649         default:
 650                 r = -EINVAL;
 651                 break;
 652         }
 653
 654         if (!r)
 655                 r = kvmppc_sanity_check(vcpu);
 656
 657         return r;
 658 }
 659
 660 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 661                                     struct kvm_mp_state *mp_state)
 662 {
 663         return -EINVAL;
 664 }
 665
 666 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 667                                     struct kvm_mp_state *mp_state)
 668 {
 669         return -EINVAL;
 670 }
 671
 672 long kvm_arch_vcpu_ioctl(struct file *filp,
 673                          unsigned int ioctl, unsigned long arg)
 674 {
 675         struct kvm_vcpu *vcpu = filp->private_data;
 676         void __user *argp = (void __user *)arg;
 677         long r;
 678
 679         switch (ioctl) {
 680         case KVM_INTERRUPT: {
 681                 struct kvm_interrupt irq;
 682                 r = -EFAULT;
 683                 if (copy_from_user(&irq, argp, sizeof(irq)))
 684                         goto out;
 685                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
 686                 goto out;
 687         }
 688
 689         case KVM_ENABLE_CAP:
 690         {
 691                 struct kvm_enable_cap cap;
 692                 r = -EFAULT;
 693                 if (copy_from_user(&cap, argp, sizeof(cap)))
 694                         goto out;
 695                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
 696                 break;
 697         }
 698
 699         case KVM_SET_ONE_REG:
 700         case KVM_GET_ONE_REG:
 701         {
 702                 struct kvm_one_reg reg;
 703                 r = -EFAULT;
 704                 if (copy_from_user(&reg, argp, sizeof(reg)))
 705                         goto out;
 706                 if (ioctl == KVM_SET_ONE_REG)
 707                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
 708                 else
 709                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
 710                 break;
 711         }
 712
 713 #ifdef CONFIG_KVM_E500
 714         case KVM_DIRTY_TLB: {
 715                 struct kvm_dirty_tlb dirty;
 716                 r = -EFAULT;
 717                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
 718                         goto out;
 719                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
 720                 break;
 721         }
 722 #endif
 723
 724         default:
 725                 r = -EINVAL;
 726         }
 727
 728 out:
 729         return r;
 730 }
 731
 732 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
 733 {
 734         return VM_FAULT_SIGBUS;
 735 }
 736
 737 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
 738 {
 739         u32 inst_lis = 0x3c000000;
 740         u32 inst_ori = 0x60000000;
 741         u32 inst_nop = 0x60000000;
 742         u32 inst_sc = 0x44000002;
 743         u32 inst_imm_mask = 0xffff;
 744
 745         /*
 746          * The hypercall to get into KVM from within guest context is as
 747          * follows:
 748          *
 749          *    lis r0, r0, KVM_SC_MAGIC_R0@h
 750          *    ori r0, KVM_SC_MAGIC_R0@l
 751          *    sc
 752          *    nop
 753          */
 754         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
 755         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
 756         pvinfo->hcall[2] = inst_sc;
 757         pvinfo->hcall[3] = inst_nop;
 758
 759         return 0;
 760 }
 761
 762 long kvm_arch_vm_ioctl(struct file *filp,
 763                        unsigned int ioctl, unsigned long arg)
 764 {
 765         void __user *argp = (void __user *)arg;
 766         long r;
 767
 768         switch (ioctl) {
 769         case KVM_PPC_GET_PVINFO: {
 770                 struct kvm_ppc_pvinfo pvinfo;
 771                 memset(&pvinfo, 0, sizeof(pvinfo));
 772                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
 773                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
 774                         r = -EFAULT;
 775                         goto out;
 776                 }
 777
 778                 break;
 779         }
 780 #ifdef CONFIG_KVM_BOOK3S_64_HV
 781         case KVM_CREATE_SPAPR_TCE: {
 782                 struct kvm_create_spapr_tce create_tce;
 783                 struct kvm *kvm = filp->private_data;
 784
 785                 r = -EFAULT;
 786                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
 787                         goto out;
 788                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
 789                 goto out;
 790         }
 791
 792         case KVM_ALLOCATE_RMA: {
 793                 struct kvm *kvm = filp->private_data;
 794                 struct kvm_allocate_rma rma;
 795
 796                 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
 797                 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
 798                         r = -EFAULT;
 799                 break;
 800         }
 801 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 802
 803         default:
 804                 r = -ENOTTY;
 805         }
 806
 807 out:
 808         return r;
 809 }
 810
 811 int kvm_arch_init(void *opaque)
 812 {
 813         return 0;
 814 }
 815
 816 void kvm_arch_exit(void)
 817 {
 818 }