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