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