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