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 <asm/cputhreads.h>
  34 #include "timing.h"
  35 #include "../mm/mmu_decl.h"
  36
  37 #define CREATE_TRACE_POINTS
  38 #include "trace.h"
  39
  40 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  41 {
  42         return !(v->arch.shared->msr & MSR_WE) ||
  43                !!(v->arch.pending_exceptions);
  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;
  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)
 176 {
 177         return kvmppc_core_init_vm(kvm);
 178 }
 179
 180 void kvm_arch_destroy_vm(struct kvm *kvm)
 181 {
 182         unsigned int i;
 183         struct kvm_vcpu *vcpu;
 184
 185         kvm_for_each_vcpu(i, vcpu, kvm)
 186                 kvm_arch_vcpu_free(vcpu);
 187
 188         mutex_lock(&kvm->lock);
 189         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 190                 kvm->vcpus[i] = NULL;
 191
 192         atomic_set(&kvm->online_vcpus, 0);
 193
 194         kvmppc_core_destroy_vm(kvm);
 195
 196         mutex_unlock(&kvm->lock);
 197 }
 198
 199 void kvm_arch_sync_events(struct kvm *kvm)
 200 {
 201 }
 202
 203 int kvm_dev_ioctl_check_extension(long ext)
 204 {
 205         int r;
 206
 207         switch (ext) {
 208 #ifdef CONFIG_BOOKE
 209         case KVM_CAP_PPC_BOOKE_SREGS:
 210 #else
 211         case KVM_CAP_PPC_SEGSTATE:
 212         case KVM_CAP_PPC_HIOR:
 213         case KVM_CAP_PPC_PAPR:
 214 #endif
 215         case KVM_CAP_PPC_UNSET_IRQ:
 216         case KVM_CAP_PPC_IRQ_LEVEL:
 217         case KVM_CAP_ENABLE_CAP:
 218                 r = 1;
 219                 break;
 220 #ifndef CONFIG_KVM_BOOK3S_64_HV
 221         case KVM_CAP_PPC_PAIRED_SINGLES:
 222         case KVM_CAP_PPC_OSI:
 223         case KVM_CAP_PPC_GET_PVINFO:
 224                 r = 1;
 225                 break;
 226         case KVM_CAP_COALESCED_MMIO:
 227                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 228                 break;
 229 #endif
 230 #ifdef CONFIG_KVM_BOOK3S_64_HV
 231         case KVM_CAP_SPAPR_TCE:
 232                 r = 1;
 233                 break;
 234         case KVM_CAP_PPC_SMT:
 235                 r = threads_per_core;
 236                 break;
 237         case KVM_CAP_PPC_RMA:
 238                 r = 1;
 239                 /* PPC970 requires an RMA */
 240                 if (cpu_has_feature(CPU_FTR_ARCH_201))
 241                         r = 2;
 242                 break;
 243 #endif
 244         default:
 245                 r = 0;
 246                 break;
 247         }
 248         return r;
 249
 250 }
 251
 252 long kvm_arch_dev_ioctl(struct file *filp,
 253                         unsigned int ioctl, unsigned long arg)
 254 {
 255         return -EINVAL;
 256 }
 257
 258 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 259                                    struct kvm_memory_slot *memslot,
 260                                    struct kvm_memory_slot old,
 261                                    struct kvm_userspace_memory_region *mem,
 262                                    int user_alloc)
 263 {
 264         return kvmppc_core_prepare_memory_region(kvm, mem);
 265 }
 266
 267 void kvm_arch_commit_memory_region(struct kvm *kvm,
 268                struct kvm_userspace_memory_region *mem,
 269                struct kvm_memory_slot old,
 270                int user_alloc)
 271 {
 272         kvmppc_core_commit_memory_region(kvm, mem);
 273 }
 274
 275
 276 void kvm_arch_flush_shadow(struct kvm *kvm)
 277 {
 278 }
 279
 280 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 281 {
 282         struct kvm_vcpu *vcpu;
 283         vcpu = kvmppc_core_vcpu_create(kvm, id);
 284         vcpu->arch.wqp = &vcpu->wq;
 285         if (!IS_ERR(vcpu))
 286                 kvmppc_create_vcpu_debugfs(vcpu, id);
 287         return vcpu;
 288 }
 289
 290 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 291 {
 292         /* Make sure we're not using the vcpu anymore */
 293         hrtimer_cancel(&vcpu->arch.dec_timer);
 294         tasklet_kill(&vcpu->arch.tasklet);
 295
 296         kvmppc_remove_vcpu_debugfs(vcpu);
 297         kvmppc_core_vcpu_free(vcpu);
 298 }
 299
 300 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 301 {
 302         kvm_arch_vcpu_free(vcpu);
 303 }
 304
 305 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 306 {
 307         return kvmppc_core_pending_dec(vcpu);
 308 }
 309
 310 static void kvmppc_decrementer_func(unsigned long data)
 311 {
 312         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
 313
 314         kvmppc_core_queue_dec(vcpu);
 315
 316         if (waitqueue_active(vcpu->arch.wqp)) {
 317                 wake_up_interruptible(vcpu->arch.wqp);
 318                 vcpu->stat.halt_wakeup++;
 319         }
 320 }
 321
 322 /*
 323  * low level hrtimer wake routine. Because this runs in hardirq context
 324  * we schedule a tasklet to do the real work.
 325  */
 326 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 327 {
 328         struct kvm_vcpu *vcpu;
 329
 330         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 331         tasklet_schedule(&vcpu->arch.tasklet);
 332
 333         return HRTIMER_NORESTART;
 334 }
 335
 336 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 337 {
 338         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 339         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 340         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 341         vcpu->arch.dec_expires = ~(u64)0;
 342
 343 #ifdef CONFIG_KVM_EXIT_TIMING
 344         mutex_init(&vcpu->arch.exit_timing_lock);
 345 #endif
 346
 347         return 0;
 348 }
 349
 350 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 351 {
 352         kvmppc_mmu_destroy(vcpu);
 353 }
 354
 355 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 356 {
 357 #ifdef CONFIG_BOOKE
 358         /*
 359          * vrsave (formerly usprg0) isn't used by Linux, but may
 360          * be used by the guest.
 361          *
 362          * On non-booke this is associated with Altivec and
 363          * is handled by code in book3s.c.
 364          */
 365         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 366 #endif
 367         kvmppc_core_vcpu_load(vcpu, cpu);
 368         vcpu->cpu = smp_processor_id();
 369 }
 370
 371 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 372 {
 373         kvmppc_core_vcpu_put(vcpu);
 374 #ifdef CONFIG_BOOKE
 375         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 376 #endif
 377         vcpu->cpu = -1;
 378 }
 379
 380 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 381                                         struct kvm_guest_debug *dbg)
 382 {
 383         return -EINVAL;
 384 }
 385
 386 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 387                                      struct kvm_run *run)
 388 {
 389         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 390 }
 391
 392 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 393                                       struct kvm_run *run)
 394 {
 395         u64 uninitialized_var(gpr);
 396
 397         if (run->mmio.len > sizeof(gpr)) {
 398                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 399                 return;
 400         }
 401
 402         if (vcpu->arch.mmio_is_bigendian) {
 403                 switch (run->mmio.len) {
 404                 case 8: gpr = *(u64 *)run->mmio.data; break;
 405                 case 4: gpr = *(u32 *)run->mmio.data; break;
 406                 case 2: gpr = *(u16 *)run->mmio.data; break;
 407                 case 1: gpr = *(u8 *)run->mmio.data; break;
 408                 }
 409         } else {
 410                 /* Convert BE data from userland back to LE. */
 411                 switch (run->mmio.len) {
 412                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 413                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 414                 case 1: gpr = *(u8 *)run->mmio.data; break;
 415                 }
 416         }
 417
 418         if (vcpu->arch.mmio_sign_extend) {
 419                 switch (run->mmio.len) {
 420 #ifdef CONFIG_PPC64
 421                 case 4:
 422                         gpr = (s64)(s32)gpr;
 423                         break;
 424 #endif
 425                 case 2:
 426                         gpr = (s64)(s16)gpr;
 427                         break;
 428                 case 1:
 429                         gpr = (s64)(s8)gpr;
 430                         break;
 431                 }
 432         }
 433
 434         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 435
 436         switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
 437         case KVM_REG_GPR:
 438                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 439                 break;
 440         case KVM_REG_FPR:
 441                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 442                 break;
 443 #ifdef CONFIG_PPC_BOOK3S
 444         case KVM_REG_QPR:
 445                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 446                 break;
 447         case KVM_REG_FQPR:
 448                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 449                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 450                 break;
 451 #endif
 452         default:
 453                 BUG();
 454         }
 455 }
 456
 457 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 458                        unsigned int rt, unsigned int bytes, int is_bigendian)
 459 {
 460         if (bytes > sizeof(run->mmio.data)) {
 461                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 462                        run->mmio.len);
 463         }
 464
 465         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 466         run->mmio.len = bytes;
 467         run->mmio.is_write = 0;
 468
 469         vcpu->arch.io_gpr = rt;
 470         vcpu->arch.mmio_is_bigendian = is_bigendian;
 471         vcpu->mmio_needed = 1;
 472         vcpu->mmio_is_write = 0;
 473         vcpu->arch.mmio_sign_extend = 0;
 474
 475         return EMULATE_DO_MMIO;
 476 }
 477
 478 /* Same as above, but sign extends */
 479 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 480                         unsigned int rt, unsigned int bytes, int is_bigendian)
 481 {
 482         int r;
 483
 484         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
 485         vcpu->arch.mmio_sign_extend = 1;
 486
 487         return r;
 488 }
 489
 490 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 491                         u64 val, unsigned int bytes, int is_bigendian)
 492 {
 493         void *data = run->mmio.data;
 494
 495         if (bytes > sizeof(run->mmio.data)) {
 496                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 497                        run->mmio.len);
 498         }
 499
 500         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 501         run->mmio.len = bytes;
 502         run->mmio.is_write = 1;
 503         vcpu->mmio_needed = 1;
 504         vcpu->mmio_is_write = 1;
 505
 506         /* Store the value at the lowest bytes in 'data'. */
 507         if (is_bigendian) {
 508                 switch (bytes) {
 509                 case 8: *(u64 *)data = val; break;
 510                 case 4: *(u32 *)data = val; break;
 511                 case 2: *(u16 *)data = val; break;
 512                 case 1: *(u8  *)data = val; break;
 513                 }
 514         } else {
 515                 /* Store LE value into 'data'. */
 516                 switch (bytes) {
 517                 case 4: st_le32(data, val); break;
 518                 case 2: st_le16(data, val); break;
 519                 case 1: *(u8 *)data = val; break;
 520                 }
 521         }
 522
 523         return EMULATE_DO_MMIO;
 524 }
 525
 526 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 527 {
 528         int r;
 529         sigset_t sigsaved;
 530
 531         if (vcpu->sigset_active)
 532                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 533
 534         if (vcpu->mmio_needed) {
 535                 if (!vcpu->mmio_is_write)
 536                         kvmppc_complete_mmio_load(vcpu, run);
 537                 vcpu->mmio_needed = 0;
 538         } else if (vcpu->arch.dcr_needed) {
 539                 if (!vcpu->arch.dcr_is_write)
 540                         kvmppc_complete_dcr_load(vcpu, run);
 541                 vcpu->arch.dcr_needed = 0;
 542         } else if (vcpu->arch.osi_needed) {
 543                 u64 *gprs = run->osi.gprs;
 544                 int i;
 545
 546                 for (i = 0; i < 32; i++)
 547                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 548                 vcpu->arch.osi_needed = 0;
 549         } else if (vcpu->arch.hcall_needed) {
 550                 int i;
 551
 552                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 553                 for (i = 0; i < 9; ++i)
 554                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 555                 vcpu->arch.hcall_needed = 0;
 556         }
 557
 558         kvmppc_core_deliver_interrupts(vcpu);
 559
 560         r = kvmppc_vcpu_run(run, vcpu);
 561
 562         if (vcpu->sigset_active)
 563                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 564
 565         return r;
 566 }
 567
 568 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 569 {
 570         if (irq->irq == KVM_INTERRUPT_UNSET) {
 571                 kvmppc_core_dequeue_external(vcpu, irq);
 572                 return 0;
 573         }
 574
 575         kvmppc_core_queue_external(vcpu, irq);
 576
 577         if (waitqueue_active(vcpu->arch.wqp)) {
 578                 wake_up_interruptible(vcpu->arch.wqp);
 579                 vcpu->stat.halt_wakeup++;
 580         } else if (vcpu->cpu != -1) {
 581                 smp_send_reschedule(vcpu->cpu);
 582         }
 583
 584         return 0;
 585 }
 586
 587 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 588                                      struct kvm_enable_cap *cap)
 589 {
 590         int r;
 591
 592         if (cap->flags)
 593                 return -EINVAL;
 594
 595         switch (cap->cap) {
 596         case KVM_CAP_PPC_OSI:
 597                 r = 0;
 598                 vcpu->arch.osi_enabled = true;
 599                 break;
 600         case KVM_CAP_PPC_PAPR:
 601                 r = 0;
 602                 vcpu->arch.papr_enabled = true;
 603                 break;
 604         default:
 605                 r = -EINVAL;
 606                 break;
 607         }
 608
 609         if (!r)
 610                 r = kvmppc_sanity_check(vcpu);
 611
 612         return r;
 613 }
 614
 615 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 616                                     struct kvm_mp_state *mp_state)
 617 {
 618         return -EINVAL;
 619 }
 620
 621 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 622                                     struct kvm_mp_state *mp_state)
 623 {
 624         return -EINVAL;
 625 }
 626
 627 long kvm_arch_vcpu_ioctl(struct file *filp,
 628                          unsigned int ioctl, unsigned long arg)
 629 {
 630         struct kvm_vcpu *vcpu = filp->private_data;
 631         void __user *argp = (void __user *)arg;
 632         long r;
 633
 634         switch (ioctl) {
 635         case KVM_INTERRUPT: {
 636                 struct kvm_interrupt irq;
 637                 r = -EFAULT;
 638                 if (copy_from_user(&irq, argp, sizeof(irq)))
 639                         goto out;
 640                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
 641                 goto out;
 642         }
 643
 644         case KVM_ENABLE_CAP:
 645         {
 646                 struct kvm_enable_cap cap;
 647                 r = -EFAULT;
 648                 if (copy_from_user(&cap, argp, sizeof(cap)))
 649                         goto out;
 650                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
 651                 break;
 652         }
 653         default:
 654                 r = -EINVAL;
 655         }
 656
 657 out:
 658         return r;
 659 }
 660
 661 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
 662 {
 663         u32 inst_lis = 0x3c000000;
 664         u32 inst_ori = 0x60000000;
 665         u32 inst_nop = 0x60000000;
 666         u32 inst_sc = 0x44000002;
 667         u32 inst_imm_mask = 0xffff;
 668
 669         /*
 670          * The hypercall to get into KVM from within guest context is as
 671          * follows:
 672          *
 673          *    lis r0, r0, KVM_SC_MAGIC_R0@h
 674          *    ori r0, KVM_SC_MAGIC_R0@l
 675          *    sc
 676          *    nop
 677          */
 678         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
 679         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
 680         pvinfo->hcall[2] = inst_sc;
 681         pvinfo->hcall[3] = inst_nop;
 682
 683         return 0;
 684 }
 685
 686 long kvm_arch_vm_ioctl(struct file *filp,
 687                        unsigned int ioctl, unsigned long arg)
 688 {
 689         void __user *argp = (void __user *)arg;
 690         long r;
 691
 692         switch (ioctl) {
 693         case KVM_PPC_GET_PVINFO: {
 694                 struct kvm_ppc_pvinfo pvinfo;
 695                 memset(&pvinfo, 0, sizeof(pvinfo));
 696                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
 697                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
 698                         r = -EFAULT;
 699                         goto out;
 700                 }
 701
 702                 break;
 703         }
 704 #ifdef CONFIG_KVM_BOOK3S_64_HV
 705         case KVM_CREATE_SPAPR_TCE: {
 706                 struct kvm_create_spapr_tce create_tce;
 707                 struct kvm *kvm = filp->private_data;
 708
 709                 r = -EFAULT;
 710                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
 711                         goto out;
 712                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
 713                 goto out;
 714         }
 715
 716         case KVM_ALLOCATE_RMA: {
 717                 struct kvm *kvm = filp->private_data;
 718                 struct kvm_allocate_rma rma;
 719
 720                 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
 721                 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
 722                         r = -EFAULT;
 723                 break;
 724         }
 725 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 726
 727         default:
 728                 r = -ENOTTY;
 729         }
 730
 731 out:
 732         return r;
 733 }
 734
 735 int kvm_arch_init(void *opaque)
 736 {
 737         return 0;
 738 }
 739
 740 void kvm_arch_exit(void)
 741 {
 742 }