Pileus Git - ~andy/linux/blob - arch/powerpc/kvm/powerpc.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License, version 2, as
   4  * published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public License
  12  * along with this program; if not, write to the Free Software
  13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14  *
  15  * Copyright IBM Corp. 2007
  16  *
  17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
  19  */
  20
  21 #include <linux/errno.h>
  22 #include <linux/err.h>
  23 #include <linux/kvm_host.h>
  24 #include <linux/vmalloc.h>
  25 #include <linux/hrtimer.h>
  26 #include <linux/fs.h>
  27 #include <linux/slab.h>
  28 #include <asm/cputable.h>
  29 #include <asm/uaccess.h>
  30 #include <asm/kvm_ppc.h>
  31 #include <asm/tlbflush.h>
  32 #include <asm/cputhreads.h>
  33 #include "timing.h"
  34 #include "../mm/mmu_decl.h"
  35
  36 #define CREATE_TRACE_POINTS
  37 #include "trace.h"
  38
  39 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  40 {
  41         return !(v->arch.shared->msr & MSR_WE) ||
  42                !!(v->arch.pending_exceptions) ||
  43                v->requests;
  44 }
  45
  46 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  47 {
  48         return 1;
  49 }
  50
  51 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
  52 {
  53         int nr = kvmppc_get_gpr(vcpu, 11);
  54         int r;
  55         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
  56         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
  57         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
  58         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
  59         unsigned long r2 = 0;
  60
  61         if (!(vcpu->arch.shared->msr & MSR_SF)) {
  62                 /* 32 bit mode */
  63                 param1 &= 0xffffffff;
  64                 param2 &= 0xffffffff;
  65                 param3 &= 0xffffffff;
  66                 param4 &= 0xffffffff;
  67         }
  68
  69         switch (nr) {
  70         case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
  71         {
  72                 vcpu->arch.magic_page_pa = param1;
  73                 vcpu->arch.magic_page_ea = param2;
  74
  75                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
  76
  77                 r = HC_EV_SUCCESS;
  78                 break;
  79         }
  80         case HC_VENDOR_KVM | KVM_HC_FEATURES:
  81                 r = HC_EV_SUCCESS;
  82 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500)
  83                 /* XXX Missing magic page on 44x */
  84                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
  85 #endif
  86
  87                 /* Second return value is in r4 */
  88                 break;
  89         default:
  90                 r = HC_EV_UNIMPLEMENTED;
  91                 break;
  92         }
  93
  94         kvmppc_set_gpr(vcpu, 4, r2);
  95
  96         return r;
  97 }
  98
  99 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 100 {
 101         int r = false;
 102
 103         /* We have to know what CPU to virtualize */
 104         if (!vcpu->arch.pvr)
 105                 goto out;
 106
 107         /* PAPR only works with book3s_64 */
 108         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 109                 goto out;
 110
 111 #ifdef CONFIG_KVM_BOOK3S_64_HV
 112         /* HV KVM can only do PAPR mode for now */
 113         if (!vcpu->arch.papr_enabled)
 114                 goto out;
 115 #endif
 116
 117         r = true;
 118
 119 out:
 120         vcpu->arch.sane = r;
 121         return r ? 0 : -EINVAL;
 122 }
 123
 124 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 125 {
 126         enum emulation_result er;
 127         int r;
 128
 129         er = kvmppc_emulate_instruction(run, vcpu);
 130         switch (er) {
 131         case EMULATE_DONE:
 132                 /* Future optimization: only reload non-volatiles if they were
 133                  * actually modified. */
 134                 r = RESUME_GUEST_NV;
 135                 break;
 136         case EMULATE_DO_MMIO:
 137                 run->exit_reason = KVM_EXIT_MMIO;
 138                 /* We must reload nonvolatiles because "update" load/store
 139                  * instructions modify register state. */
 140                 /* Future optimization: only reload non-volatiles if they were
 141                  * actually modified. */
 142                 r = RESUME_HOST_NV;
 143                 break;
 144         case EMULATE_FAIL:
 145                 /* XXX Deliver Program interrupt to guest. */
 146                 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
 147                        kvmppc_get_last_inst(vcpu));
 148                 r = RESUME_HOST;
 149                 break;
 150         default:
 151                 BUG();
 152         }
 153
 154         return r;
 155 }
 156
 157 int kvm_arch_hardware_enable(void *garbage)
 158 {
 159         return 0;
 160 }
 161
 162 void kvm_arch_hardware_disable(void *garbage)
 163 {
 164 }
 165
 166 int kvm_arch_hardware_setup(void)
 167 {
 168         return 0;
 169 }
 170
 171 void kvm_arch_hardware_unsetup(void)
 172 {
 173 }
 174
 175 void kvm_arch_check_processor_compat(void *rtn)
 176 {
 177         *(int *)rtn = kvmppc_core_check_processor_compat();
 178 }
 179
 180 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 181 {
 182         if (type)
 183                 return -EINVAL;
 184
 185         return kvmppc_core_init_vm(kvm);
 186 }
 187
 188 void kvm_arch_destroy_vm(struct kvm *kvm)
 189 {
 190         unsigned int i;
 191         struct kvm_vcpu *vcpu;
 192
 193         kvm_for_each_vcpu(i, vcpu, kvm)
 194                 kvm_arch_vcpu_free(vcpu);
 195
 196         mutex_lock(&kvm->lock);
 197         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 198                 kvm->vcpus[i] = NULL;
 199
 200         atomic_set(&kvm->online_vcpus, 0);
 201
 202         kvmppc_core_destroy_vm(kvm);
 203
 204         mutex_unlock(&kvm->lock);
 205 }
 206
 207 void kvm_arch_sync_events(struct kvm *kvm)
 208 {
 209 }
 210
 211 int kvm_dev_ioctl_check_extension(long ext)
 212 {
 213         int r;
 214
 215         switch (ext) {
 216 #ifdef CONFIG_BOOKE
 217         case KVM_CAP_PPC_BOOKE_SREGS:
 218 #else
 219         case KVM_CAP_PPC_SEGSTATE:
 220         case KVM_CAP_PPC_HIOR:
 221         case KVM_CAP_PPC_PAPR:
 222 #endif
 223         case KVM_CAP_PPC_UNSET_IRQ:
 224         case KVM_CAP_PPC_IRQ_LEVEL:
 225         case KVM_CAP_ENABLE_CAP:
 226         case KVM_CAP_ONE_REG:
 227                 r = 1;
 228                 break;
 229 #ifndef CONFIG_KVM_BOOK3S_64_HV
 230         case KVM_CAP_PPC_PAIRED_SINGLES:
 231         case KVM_CAP_PPC_OSI:
 232         case KVM_CAP_PPC_GET_PVINFO:
 233 #ifdef CONFIG_KVM_E500
 234         case KVM_CAP_SW_TLB:
 235 #endif
 236                 r = 1;
 237                 break;
 238         case KVM_CAP_COALESCED_MMIO:
 239                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 240                 break;
 241 #endif
 242 #ifdef CONFIG_KVM_BOOK3S_64_HV
 243         case KVM_CAP_SPAPR_TCE:
 244                 r = 1;
 245                 break;
 246         case KVM_CAP_PPC_SMT:
 247                 r = threads_per_core;
 248                 break;
 249         case KVM_CAP_PPC_RMA:
 250                 r = 1;
 251                 /* PPC970 requires an RMA */
 252                 if (cpu_has_feature(CPU_FTR_ARCH_201))
 253                         r = 2;
 254                 break;
 255         case KVM_CAP_SYNC_MMU:
 256                 r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
 257                 break;
 258 #endif
 259         case KVM_CAP_NR_VCPUS:
 260                 /*
 261                  * Recommending a number of CPUs is somewhat arbitrary; we
 262                  * return the number of present CPUs for -HV (since a host
 263                  * will have secondary threads "offline"), and for other KVM
 264                  * implementations just count online CPUs.
 265                  */
 266 #ifdef CONFIG_KVM_BOOK3S_64_HV
 267                 r = num_present_cpus();
 268 #else
 269                 r = num_online_cpus();
 270 #endif
 271                 break;
 272         case KVM_CAP_MAX_VCPUS:
 273                 r = KVM_MAX_VCPUS;
 274                 break;
 275         default:
 276                 r = 0;
 277                 break;
 278         }
 279         return r;
 280
 281 }
 282
 283 long kvm_arch_dev_ioctl(struct file *filp,
 284                         unsigned int ioctl, unsigned long arg)
 285 {
 286         return -EINVAL;
 287 }
 288
 289 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
 290                            struct kvm_memory_slot *dont)
 291 {
 292 }
 293
 294 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
 295 {
 296         return 0;
 297 }
 298
 299 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 300                                    struct kvm_memory_slot *memslot,
 301                                    struct kvm_memory_slot old,
 302                                    struct kvm_userspace_memory_region *mem,
 303                                    int user_alloc)
 304 {
 305         return kvmppc_core_prepare_memory_region(kvm, mem);
 306 }
 307
 308 void kvm_arch_commit_memory_region(struct kvm *kvm,
 309                struct kvm_userspace_memory_region *mem,
 310                struct kvm_memory_slot old,
 311                int user_alloc)
 312 {
 313         kvmppc_core_commit_memory_region(kvm, mem);
 314 }
 315
 316
 317 void kvm_arch_flush_shadow(struct kvm *kvm)
 318 {
 319 }
 320
 321 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 322 {
 323         struct kvm_vcpu *vcpu;
 324         vcpu = kvmppc_core_vcpu_create(kvm, id);
 325         if (!IS_ERR(vcpu)) {
 326                 vcpu->arch.wqp = &vcpu->wq;
 327                 kvmppc_create_vcpu_debugfs(vcpu, id);
 328         }
 329         return vcpu;
 330 }
 331
 332 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 333 {
 334         /* Make sure we're not using the vcpu anymore */
 335         hrtimer_cancel(&vcpu->arch.dec_timer);
 336         tasklet_kill(&vcpu->arch.tasklet);
 337
 338         kvmppc_remove_vcpu_debugfs(vcpu);
 339         kvmppc_core_vcpu_free(vcpu);
 340 }
 341
 342 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 343 {
 344         kvm_arch_vcpu_free(vcpu);
 345 }
 346
 347 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 348 {
 349         return kvmppc_core_pending_dec(vcpu);
 350 }
 351
 352 /*
 353  * low level hrtimer wake routine. Because this runs in hardirq context
 354  * we schedule a tasklet to do the real work.
 355  */
 356 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 357 {
 358         struct kvm_vcpu *vcpu;
 359
 360         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 361         tasklet_schedule(&vcpu->arch.tasklet);
 362
 363         return HRTIMER_NORESTART;
 364 }
 365
 366 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 367 {
 368         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 369         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 370         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 371         vcpu->arch.dec_expires = ~(u64)0;
 372
 373 #ifdef CONFIG_KVM_EXIT_TIMING
 374         mutex_init(&vcpu->arch.exit_timing_lock);
 375 #endif
 376
 377         return 0;
 378 }
 379
 380 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 381 {
 382         kvmppc_mmu_destroy(vcpu);
 383 }
 384
 385 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 386 {
 387 #ifdef CONFIG_BOOKE
 388         /*
 389          * vrsave (formerly usprg0) isn't used by Linux, but may
 390          * be used by the guest.
 391          *
 392          * On non-booke this is associated with Altivec and
 393          * is handled by code in book3s.c.
 394          */
 395         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 396 #endif
 397         kvmppc_core_vcpu_load(vcpu, cpu);
 398         vcpu->cpu = smp_processor_id();
 399 }
 400
 401 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 402 {
 403         kvmppc_core_vcpu_put(vcpu);
 404 #ifdef CONFIG_BOOKE
 405         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 406 #endif
 407         vcpu->cpu = -1;
 408 }
 409
 410 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 411                                         struct kvm_guest_debug *dbg)
 412 {
 413         return -EINVAL;
 414 }
 415
 416 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 417                                      struct kvm_run *run)
 418 {
 419         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 420 }
 421
 422 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 423                                       struct kvm_run *run)
 424 {
 425         u64 uninitialized_var(gpr);
 426
 427         if (run->mmio.len > sizeof(gpr)) {
 428                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 429                 return;
 430         }
 431
 432         if (vcpu->arch.mmio_is_bigendian) {
 433                 switch (run->mmio.len) {
 434                 case 8: gpr = *(u64 *)run->mmio.data; break;
 435                 case 4: gpr = *(u32 *)run->mmio.data; break;
 436                 case 2: gpr = *(u16 *)run->mmio.data; break;
 437                 case 1: gpr = *(u8 *)run->mmio.data; break;
 438                 }
 439         } else {
 440                 /* Convert BE data from userland back to LE. */
 441                 switch (run->mmio.len) {
 442                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 443                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 444                 case 1: gpr = *(u8 *)run->mmio.data; break;
 445                 }
 446         }
 447
 448         if (vcpu->arch.mmio_sign_extend) {
 449                 switch (run->mmio.len) {
 450 #ifdef CONFIG_PPC64
 451                 case 4:
 452                         gpr = (s64)(s32)gpr;
 453                         break;
 454 #endif
 455                 case 2:
 456                         gpr = (s64)(s16)gpr;
 457                         break;
 458                 case 1:
 459                         gpr = (s64)(s8)gpr;
 460                         break;
 461                 }
 462         }
 463
 464         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 465
 466         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
 467         case KVM_MMIO_REG_GPR:
 468                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 469                 break;
 470         case KVM_MMIO_REG_FPR:
 471                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 472                 break;
 473 #ifdef CONFIG_PPC_BOOK3S
 474         case KVM_MMIO_REG_QPR:
 475                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 476                 break;
 477         case KVM_MMIO_REG_FQPR:
 478                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 479                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 480                 break;
 481 #endif
 482         default:
 483                 BUG();
 484         }
 485 }
 486
 487 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 488                        unsigned int rt, unsigned int bytes, int is_bigendian)
 489 {
 490         if (bytes > sizeof(run->mmio.data)) {
 491                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 492                        run->mmio.len);
 493         }
 494
 495         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 496         run->mmio.len = bytes;
 497         run->mmio.is_write = 0;
 498
 499         vcpu->arch.io_gpr = rt;
 500         vcpu->arch.mmio_is_bigendian = is_bigendian;
 501         vcpu->mmio_needed = 1;
 502         vcpu->mmio_is_write = 0;
 503         vcpu->arch.mmio_sign_extend = 0;
 504
 505         return EMULATE_DO_MMIO;
 506 }
 507
 508 /* Same as above, but sign extends */
 509 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 510                         unsigned int rt, unsigned int bytes, int is_bigendian)
 511 {
 512         int r;
 513
 514         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
 515         vcpu->arch.mmio_sign_extend = 1;
 516
 517         return r;
 518 }
 519
 520 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 521                         u64 val, unsigned int bytes, int is_bigendian)
 522 {
 523         void *data = run->mmio.data;
 524
 525         if (bytes > sizeof(run->mmio.data)) {
 526                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 527                        run->mmio.len);
 528         }
 529
 530         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 531         run->mmio.len = bytes;
 532         run->mmio.is_write = 1;
 533         vcpu->mmio_needed = 1;
 534         vcpu->mmio_is_write = 1;
 535
 536         /* Store the value at the lowest bytes in 'data'. */
 537         if (is_bigendian) {
 538                 switch (bytes) {
 539                 case 8: *(u64 *)data = val; break;
 540                 case 4: *(u32 *)data = val; break;
 541                 case 2: *(u16 *)data = val; break;
 542                 case 1: *(u8  *)data = val; break;
 543                 }
 544         } else {
 545                 /* Store LE value into 'data'. */
 546                 switch (bytes) {
 547                 case 4: st_le32(data, val); break;
 548                 case 2: st_le16(data, val); break;
 549                 case 1: *(u8 *)data = val; break;
 550                 }
 551         }
 552
 553         return EMULATE_DO_MMIO;
 554 }
 555
 556 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 557 {
 558         int r;
 559         sigset_t sigsaved;
 560
 561         if (vcpu->sigset_active)
 562                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 563
 564         if (vcpu->mmio_needed) {
 565                 if (!vcpu->mmio_is_write)
 566                         kvmppc_complete_mmio_load(vcpu, run);
 567                 vcpu->mmio_needed = 0;
 568         } else if (vcpu->arch.dcr_needed) {
 569                 if (!vcpu->arch.dcr_is_write)
 570                         kvmppc_complete_dcr_load(vcpu, run);
 571                 vcpu->arch.dcr_needed = 0;
 572         } else if (vcpu->arch.osi_needed) {
 573                 u64 *gprs = run->osi.gprs;
 574                 int i;
 575
 576                 for (i = 0; i < 32; i++)
 577                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 578                 vcpu->arch.osi_needed = 0;
 579         } else if (vcpu->arch.hcall_needed) {
 580                 int i;
 581
 582                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 583                 for (i = 0; i < 9; ++i)
 584                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 585                 vcpu->arch.hcall_needed = 0;
 586         }
 587
 588         r = kvmppc_vcpu_run(run, vcpu);
 589
 590         if (vcpu->sigset_active)
 591                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 592
 593         return r;
 594 }
 595
 596 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 597 {
 598         if (irq->irq == KVM_INTERRUPT_UNSET) {
 599                 kvmppc_core_dequeue_external(vcpu, irq);
 600                 return 0;
 601         }
 602
 603         kvmppc_core_queue_external(vcpu, irq);
 604
 605         kvm_vcpu_kick(vcpu);
 606
 607         return 0;
 608 }
 609
 610 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 611                                      struct kvm_enable_cap *cap)
 612 {
 613         int r;
 614
 615         if (cap->flags)
 616                 return -EINVAL;
 617
 618         switch (cap->cap) {
 619         case KVM_CAP_PPC_OSI:
 620                 r = 0;
 621                 vcpu->arch.osi_enabled = true;
 622                 break;
 623         case KVM_CAP_PPC_PAPR:
 624                 r = 0;
 625                 vcpu->arch.papr_enabled = true;
 626                 break;
 627 #ifdef CONFIG_KVM_E500
 628         case KVM_CAP_SW_TLB: {
 629                 struct kvm_config_tlb cfg;
 630                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
 631
 632                 r = -EFAULT;
 633                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
 634                         break;
 635
 636                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
 637                 break;
 638         }
 639 #endif
 640         default:
 641                 r = -EINVAL;
 642                 break;
 643         }
 644
 645         if (!r)
 646                 r = kvmppc_sanity_check(vcpu);
 647
 648         return r;
 649 }
 650
 651 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 652                                     struct kvm_mp_state *mp_state)
 653 {
 654         return -EINVAL;
 655 }
 656
 657 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 658                                     struct kvm_mp_state *mp_state)
 659 {
 660         return -EINVAL;
 661 }
 662
 663 long kvm_arch_vcpu_ioctl(struct file *filp,
 664                          unsigned int ioctl, unsigned long arg)
 665 {
 666         struct kvm_vcpu *vcpu = filp->private_data;
 667         void __user *argp = (void __user *)arg;
 668         long r;
 669
 670         switch (ioctl) {
 671         case KVM_INTERRUPT: {
 672                 struct kvm_interrupt irq;
 673                 r = -EFAULT;
 674                 if (copy_from_user(&irq, argp, sizeof(irq)))
 675                         goto out;
 676                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
 677                 goto out;
 678         }
 679
 680         case KVM_ENABLE_CAP:
 681         {
 682                 struct kvm_enable_cap cap;
 683                 r = -EFAULT;
 684                 if (copy_from_user(&cap, argp, sizeof(cap)))
 685                         goto out;
 686                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
 687                 break;
 688         }
 689
 690         case KVM_SET_ONE_REG:
 691         case KVM_GET_ONE_REG:
 692         {
 693                 struct kvm_one_reg reg;
 694                 r = -EFAULT;
 695                 if (copy_from_user(&reg, argp, sizeof(reg)))
 696                         goto out;
 697                 if (ioctl == KVM_SET_ONE_REG)
 698                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
 699                 else
 700                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
 701                 break;
 702         }
 703
 704 #ifdef CONFIG_KVM_E500
 705         case KVM_DIRTY_TLB: {
 706                 struct kvm_dirty_tlb dirty;
 707                 r = -EFAULT;
 708                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
 709                         goto out;
 710                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
 711                 break;
 712         }
 713 #endif
 714
 715         default:
 716                 r = -EINVAL;
 717         }
 718
 719 out:
 720         return r;
 721 }
 722
 723 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
 724 {
 725         return VM_FAULT_SIGBUS;
 726 }
 727
 728 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
 729 {
 730         u32 inst_lis = 0x3c000000;
 731         u32 inst_ori = 0x60000000;
 732         u32 inst_nop = 0x60000000;
 733         u32 inst_sc = 0x44000002;
 734         u32 inst_imm_mask = 0xffff;
 735
 736         /*
 737          * The hypercall to get into KVM from within guest context is as
 738          * follows:
 739          *
 740          *    lis r0, r0, KVM_SC_MAGIC_R0@h
 741          *    ori r0, KVM_SC_MAGIC_R0@l
 742          *    sc
 743          *    nop
 744          */
 745         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
 746         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
 747         pvinfo->hcall[2] = inst_sc;
 748         pvinfo->hcall[3] = inst_nop;
 749
 750         return 0;
 751 }
 752
 753 long kvm_arch_vm_ioctl(struct file *filp,
 754                        unsigned int ioctl, unsigned long arg)
 755 {
 756         void __user *argp = (void __user *)arg;
 757         long r;
 758
 759         switch (ioctl) {
 760         case KVM_PPC_GET_PVINFO: {
 761                 struct kvm_ppc_pvinfo pvinfo;
 762                 memset(&pvinfo, 0, sizeof(pvinfo));
 763                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
 764                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
 765                         r = -EFAULT;
 766                         goto out;
 767                 }
 768
 769                 break;
 770         }
 771 #ifdef CONFIG_KVM_BOOK3S_64_HV
 772         case KVM_CREATE_SPAPR_TCE: {
 773                 struct kvm_create_spapr_tce create_tce;
 774                 struct kvm *kvm = filp->private_data;
 775
 776                 r = -EFAULT;
 777                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
 778                         goto out;
 779                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
 780                 goto out;
 781         }
 782
 783         case KVM_ALLOCATE_RMA: {
 784                 struct kvm *kvm = filp->private_data;
 785                 struct kvm_allocate_rma rma;
 786
 787                 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
 788                 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
 789                         r = -EFAULT;
 790                 break;
 791         }
 792 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 793
 794         default:
 795                 r = -ENOTTY;
 796         }
 797
 798 out:
 799         return r;
 800 }
 801
 802 int kvm_arch_init(void *opaque)
 803 {
 804         return 0;
 805 }
 806
 807 void kvm_arch_exit(void)
 808 {
 809 }