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