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)
 175 {
 176         return kvmppc_core_init_vm(kvm);
 177 }
 178
 179 void kvm_arch_destroy_vm(struct kvm *kvm)
 180 {
 181         unsigned int i;
 182         struct kvm_vcpu *vcpu;
 183
 184         kvm_for_each_vcpu(i, vcpu, kvm)
 185                 kvm_arch_vcpu_free(vcpu);
 186
 187         mutex_lock(&kvm->lock);
 188         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 189                 kvm->vcpus[i] = NULL;
 190
 191         atomic_set(&kvm->online_vcpus, 0);
 192
 193         kvmppc_core_destroy_vm(kvm);
 194
 195         mutex_unlock(&kvm->lock);
 196 }
 197
 198 void kvm_arch_sync_events(struct kvm *kvm)
 199 {
 200 }
 201
 202 int kvm_dev_ioctl_check_extension(long ext)
 203 {
 204         int r;
 205
 206         switch (ext) {
 207 #ifdef CONFIG_BOOKE
 208         case KVM_CAP_PPC_BOOKE_SREGS:
 209 #else
 210         case KVM_CAP_PPC_SEGSTATE:
 211         case KVM_CAP_PPC_HIOR:
 212         case KVM_CAP_PPC_PAPR:
 213 #endif
 214         case KVM_CAP_PPC_UNSET_IRQ:
 215         case KVM_CAP_PPC_IRQ_LEVEL:
 216         case KVM_CAP_ENABLE_CAP:
 217                 r = 1;
 218                 break;
 219 #ifndef CONFIG_KVM_BOOK3S_64_HV
 220         case KVM_CAP_PPC_PAIRED_SINGLES:
 221         case KVM_CAP_PPC_OSI:
 222         case KVM_CAP_PPC_GET_PVINFO:
 223                 r = 1;
 224                 break;
 225         case KVM_CAP_COALESCED_MMIO:
 226                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 227                 break;
 228 #endif
 229 #ifdef CONFIG_KVM_BOOK3S_64_HV
 230         case KVM_CAP_SPAPR_TCE:
 231                 r = 1;
 232                 break;
 233         case KVM_CAP_PPC_SMT:
 234                 r = threads_per_core;
 235                 break;
 236         case KVM_CAP_PPC_RMA:
 237                 r = 1;
 238                 /* PPC970 requires an RMA */
 239                 if (cpu_has_feature(CPU_FTR_ARCH_201))
 240                         r = 2;
 241                 break;
 242 #endif
 243         default:
 244                 r = 0;
 245                 break;
 246         }
 247         return r;
 248
 249 }
 250
 251 long kvm_arch_dev_ioctl(struct file *filp,
 252                         unsigned int ioctl, unsigned long arg)
 253 {
 254         return -EINVAL;
 255 }
 256
 257 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 258                                    struct kvm_memory_slot *memslot,
 259                                    struct kvm_memory_slot old,
 260                                    struct kvm_userspace_memory_region *mem,
 261                                    int user_alloc)
 262 {
 263         return kvmppc_core_prepare_memory_region(kvm, mem);
 264 }
 265
 266 void kvm_arch_commit_memory_region(struct kvm *kvm,
 267                struct kvm_userspace_memory_region *mem,
 268                struct kvm_memory_slot old,
 269                int user_alloc)
 270 {
 271         kvmppc_core_commit_memory_region(kvm, mem);
 272 }
 273
 274
 275 void kvm_arch_flush_shadow(struct kvm *kvm)
 276 {
 277 }
 278
 279 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 280 {
 281         struct kvm_vcpu *vcpu;
 282         vcpu = kvmppc_core_vcpu_create(kvm, id);
 283         vcpu->arch.wqp = &vcpu->wq;
 284         if (!IS_ERR(vcpu))
 285                 kvmppc_create_vcpu_debugfs(vcpu, id);
 286         return vcpu;
 287 }
 288
 289 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 290 {
 291         /* Make sure we're not using the vcpu anymore */
 292         hrtimer_cancel(&vcpu->arch.dec_timer);
 293         tasklet_kill(&vcpu->arch.tasklet);
 294
 295         kvmppc_remove_vcpu_debugfs(vcpu);
 296         kvmppc_core_vcpu_free(vcpu);
 297 }
 298
 299 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 300 {
 301         kvm_arch_vcpu_free(vcpu);
 302 }
 303
 304 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 305 {
 306         return kvmppc_core_pending_dec(vcpu);
 307 }
 308
 309 static void kvmppc_decrementer_func(unsigned long data)
 310 {
 311         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
 312
 313         kvmppc_core_queue_dec(vcpu);
 314
 315         if (waitqueue_active(vcpu->arch.wqp)) {
 316                 wake_up_interruptible(vcpu->arch.wqp);
 317                 vcpu->stat.halt_wakeup++;
 318         }
 319 }
 320
 321 /*
 322  * low level hrtimer wake routine. Because this runs in hardirq context
 323  * we schedule a tasklet to do the real work.
 324  */
 325 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 326 {
 327         struct kvm_vcpu *vcpu;
 328
 329         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 330         tasklet_schedule(&vcpu->arch.tasklet);
 331
 332         return HRTIMER_NORESTART;
 333 }
 334
 335 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 336 {
 337         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 338         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 339         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 340         vcpu->arch.dec_expires = ~(u64)0;
 341
 342 #ifdef CONFIG_KVM_EXIT_TIMING
 343         mutex_init(&vcpu->arch.exit_timing_lock);
 344 #endif
 345
 346         return 0;
 347 }
 348
 349 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 350 {
 351         kvmppc_mmu_destroy(vcpu);
 352 }
 353
 354 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 355 {
 356 #ifdef CONFIG_BOOKE
 357         /*
 358          * vrsave (formerly usprg0) isn't used by Linux, but may
 359          * be used by the guest.
 360          *
 361          * On non-booke this is associated with Altivec and
 362          * is handled by code in book3s.c.
 363          */
 364         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 365 #endif
 366         kvmppc_core_vcpu_load(vcpu, cpu);
 367         vcpu->cpu = smp_processor_id();
 368 }
 369
 370 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 371 {
 372         kvmppc_core_vcpu_put(vcpu);
 373 #ifdef CONFIG_BOOKE
 374         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 375 #endif
 376         vcpu->cpu = -1;
 377 }
 378
 379 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 380                                         struct kvm_guest_debug *dbg)
 381 {
 382         return -EINVAL;
 383 }
 384
 385 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 386                                      struct kvm_run *run)
 387 {
 388         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 389 }
 390
 391 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 392                                       struct kvm_run *run)
 393 {
 394         u64 uninitialized_var(gpr);
 395
 396         if (run->mmio.len > sizeof(gpr)) {
 397                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 398                 return;
 399         }
 400
 401         if (vcpu->arch.mmio_is_bigendian) {
 402                 switch (run->mmio.len) {
 403                 case 8: gpr = *(u64 *)run->mmio.data; break;
 404                 case 4: gpr = *(u32 *)run->mmio.data; break;
 405                 case 2: gpr = *(u16 *)run->mmio.data; break;
 406                 case 1: gpr = *(u8 *)run->mmio.data; break;
 407                 }
 408         } else {
 409                 /* Convert BE data from userland back to LE. */
 410                 switch (run->mmio.len) {
 411                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 412                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 413                 case 1: gpr = *(u8 *)run->mmio.data; break;
 414                 }
 415         }
 416
 417         if (vcpu->arch.mmio_sign_extend) {
 418                 switch (run->mmio.len) {
 419 #ifdef CONFIG_PPC64
 420                 case 4:
 421                         gpr = (s64)(s32)gpr;
 422                         break;
 423 #endif
 424                 case 2:
 425                         gpr = (s64)(s16)gpr;
 426                         break;
 427                 case 1:
 428                         gpr = (s64)(s8)gpr;
 429                         break;
 430                 }
 431         }
 432
 433         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 434
 435         switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
 436         case KVM_REG_GPR:
 437                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 438                 break;
 439         case KVM_REG_FPR:
 440                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 441                 break;
 442 #ifdef CONFIG_PPC_BOOK3S
 443         case KVM_REG_QPR:
 444                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 445                 break;
 446         case KVM_REG_FQPR:
 447                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 448                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 449                 break;
 450 #endif
 451         default:
 452                 BUG();
 453         }
 454 }
 455
 456 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 457                        unsigned int rt, unsigned int bytes, int is_bigendian)
 458 {
 459         if (bytes > sizeof(run->mmio.data)) {
 460                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 461                        run->mmio.len);
 462         }
 463
 464         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 465         run->mmio.len = bytes;
 466         run->mmio.is_write = 0;
 467
 468         vcpu->arch.io_gpr = rt;
 469         vcpu->arch.mmio_is_bigendian = is_bigendian;
 470         vcpu->mmio_needed = 1;
 471         vcpu->mmio_is_write = 0;
 472         vcpu->arch.mmio_sign_extend = 0;
 473
 474         return EMULATE_DO_MMIO;
 475 }
 476
 477 /* Same as above, but sign extends */
 478 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 479                         unsigned int rt, unsigned int bytes, int is_bigendian)
 480 {
 481         int r;
 482
 483         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
 484         vcpu->arch.mmio_sign_extend = 1;
 485
 486         return r;
 487 }
 488
 489 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 490                         u64 val, unsigned int bytes, int is_bigendian)
 491 {
 492         void *data = run->mmio.data;
 493
 494         if (bytes > sizeof(run->mmio.data)) {
 495                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 496                        run->mmio.len);
 497         }
 498
 499         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 500         run->mmio.len = bytes;
 501         run->mmio.is_write = 1;
 502         vcpu->mmio_needed = 1;
 503         vcpu->mmio_is_write = 1;
 504
 505         /* Store the value at the lowest bytes in 'data'. */
 506         if (is_bigendian) {
 507                 switch (bytes) {
 508                 case 8: *(u64 *)data = val; break;
 509                 case 4: *(u32 *)data = val; break;
 510                 case 2: *(u16 *)data = val; break;
 511                 case 1: *(u8  *)data = val; break;
 512                 }
 513         } else {
 514                 /* Store LE value into 'data'. */
 515                 switch (bytes) {
 516                 case 4: st_le32(data, val); break;
 517                 case 2: st_le16(data, val); break;
 518                 case 1: *(u8 *)data = val; break;
 519                 }
 520         }
 521
 522         return EMULATE_DO_MMIO;
 523 }
 524
 525 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 526 {
 527         int r;
 528         sigset_t sigsaved;
 529
 530         if (vcpu->sigset_active)
 531                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 532
 533         if (vcpu->mmio_needed) {
 534                 if (!vcpu->mmio_is_write)
 535                         kvmppc_complete_mmio_load(vcpu, run);
 536                 vcpu->mmio_needed = 0;
 537         } else if (vcpu->arch.dcr_needed) {
 538                 if (!vcpu->arch.dcr_is_write)
 539                         kvmppc_complete_dcr_load(vcpu, run);
 540                 vcpu->arch.dcr_needed = 0;
 541         } else if (vcpu->arch.osi_needed) {
 542                 u64 *gprs = run->osi.gprs;
 543                 int i;
 544
 545                 for (i = 0; i < 32; i++)
 546                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 547                 vcpu->arch.osi_needed = 0;
 548         } else if (vcpu->arch.hcall_needed) {
 549                 int i;
 550
 551                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 552                 for (i = 0; i < 9; ++i)
 553                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 554                 vcpu->arch.hcall_needed = 0;
 555         }
 556
 557         kvmppc_core_deliver_interrupts(vcpu);
 558
 559         r = kvmppc_vcpu_run(run, vcpu);
 560
 561         if (vcpu->sigset_active)
 562                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 563
 564         return r;
 565 }
 566
 567 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 568 {
 569         if (irq->irq == KVM_INTERRUPT_UNSET) {
 570                 kvmppc_core_dequeue_external(vcpu, irq);
 571                 return 0;
 572         }
 573
 574         kvmppc_core_queue_external(vcpu, irq);
 575
 576         if (waitqueue_active(vcpu->arch.wqp)) {
 577                 wake_up_interruptible(vcpu->arch.wqp);
 578                 vcpu->stat.halt_wakeup++;
 579         } else if (vcpu->cpu != -1) {
 580                 smp_send_reschedule(vcpu->cpu);
 581         }
 582
 583         return 0;
 584 }
 585
 586 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 587                                      struct kvm_enable_cap *cap)
 588 {
 589         int r;
 590
 591         if (cap->flags)
 592                 return -EINVAL;
 593
 594         switch (cap->cap) {
 595         case KVM_CAP_PPC_OSI:
 596                 r = 0;
 597                 vcpu->arch.osi_enabled = true;
 598                 break;
 599         case KVM_CAP_PPC_PAPR:
 600                 r = 0;
 601                 vcpu->arch.papr_enabled = true;
 602                 break;
 603         default:
 604                 r = -EINVAL;
 605                 break;
 606         }
 607
 608         if (!r)
 609                 r = kvmppc_sanity_check(vcpu);
 610
 611         return r;
 612 }
 613
 614 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 615                                     struct kvm_mp_state *mp_state)
 616 {
 617         return -EINVAL;
 618 }
 619
 620 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 621                                     struct kvm_mp_state *mp_state)
 622 {
 623         return -EINVAL;
 624 }
 625
 626 long kvm_arch_vcpu_ioctl(struct file *filp,
 627                          unsigned int ioctl, unsigned long arg)
 628 {
 629         struct kvm_vcpu *vcpu = filp->private_data;
 630         void __user *argp = (void __user *)arg;
 631         long r;
 632
 633         switch (ioctl) {
 634         case KVM_INTERRUPT: {
 635                 struct kvm_interrupt irq;
 636                 r = -EFAULT;
 637                 if (copy_from_user(&irq, argp, sizeof(irq)))
 638                         goto out;
 639                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
 640                 goto out;
 641         }
 642
 643         case KVM_ENABLE_CAP:
 644         {
 645                 struct kvm_enable_cap cap;
 646                 r = -EFAULT;
 647                 if (copy_from_user(&cap, argp, sizeof(cap)))
 648                         goto out;
 649                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
 650                 break;
 651         }
 652         default:
 653                 r = -EINVAL;
 654         }
 655
 656 out:
 657         return r;
 658 }
 659
 660 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
 661 {
 662         u32 inst_lis = 0x3c000000;
 663         u32 inst_ori = 0x60000000;
 664         u32 inst_nop = 0x60000000;
 665         u32 inst_sc = 0x44000002;
 666         u32 inst_imm_mask = 0xffff;
 667
 668         /*
 669          * The hypercall to get into KVM from within guest context is as
 670          * follows:
 671          *
 672          *    lis r0, r0, KVM_SC_MAGIC_R0@h
 673          *    ori r0, KVM_SC_MAGIC_R0@l
 674          *    sc
 675          *    nop
 676          */
 677         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
 678         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
 679         pvinfo->hcall[2] = inst_sc;
 680         pvinfo->hcall[3] = inst_nop;
 681
 682         return 0;
 683 }
 684
 685 long kvm_arch_vm_ioctl(struct file *filp,
 686                        unsigned int ioctl, unsigned long arg)
 687 {
 688         void __user *argp = (void __user *)arg;
 689         long r;
 690
 691         switch (ioctl) {
 692         case KVM_PPC_GET_PVINFO: {
 693                 struct kvm_ppc_pvinfo pvinfo;
 694                 memset(&pvinfo, 0, sizeof(pvinfo));
 695                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
 696                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
 697                         r = -EFAULT;
 698                         goto out;
 699                 }
 700
 701                 break;
 702         }
 703 #ifdef CONFIG_KVM_BOOK3S_64_HV
 704         case KVM_CREATE_SPAPR_TCE: {
 705                 struct kvm_create_spapr_tce create_tce;
 706                 struct kvm *kvm = filp->private_data;
 707
 708                 r = -EFAULT;
 709                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
 710                         goto out;
 711                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
 712                 goto out;
 713         }
 714
 715         case KVM_ALLOCATE_RMA: {
 716                 struct kvm *kvm = filp->private_data;
 717                 struct kvm_allocate_rma rma;
 718
 719                 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
 720                 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
 721                         r = -EFAULT;
 722                 break;
 723         }
 724 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 725
 726         default:
 727                 r = -ENOTTY;
 728         }
 729
 730 out:
 731         return r;
 732 }
 733
 734 int kvm_arch_init(void *opaque)
 735 {
 736         return 0;
 737 }
 738
 739 void kvm_arch_exit(void)
 740 {
 741 }