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_E500V2)
  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 #ifdef CONFIG_KVM_BOOKE_HV
 118         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 119                 goto out;
 120 #endif
 121
 122         r = true;
 123
 124 out:
 125         vcpu->arch.sane = r;
 126         return r ? 0 : -EINVAL;
 127 }
 128
 129 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 130 {
 131         enum emulation_result er;
 132         int r;
 133
 134         er = kvmppc_emulate_instruction(run, vcpu);
 135         switch (er) {
 136         case EMULATE_DONE:
 137                 /* Future optimization: only reload non-volatiles if they were
 138                  * actually modified. */
 139                 r = RESUME_GUEST_NV;
 140                 break;
 141         case EMULATE_DO_MMIO:
 142                 run->exit_reason = KVM_EXIT_MMIO;
 143                 /* We must reload nonvolatiles because "update" load/store
 144                  * instructions modify register state. */
 145                 /* Future optimization: only reload non-volatiles if they were
 146                  * actually modified. */
 147                 r = RESUME_HOST_NV;
 148                 break;
 149         case EMULATE_FAIL:
 150                 /* XXX Deliver Program interrupt to guest. */
 151                 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
 152                        kvmppc_get_last_inst(vcpu));
 153                 r = RESUME_HOST;
 154                 break;
 155         default:
 156                 BUG();
 157         }
 158
 159         return r;
 160 }
 161
 162 int kvm_arch_hardware_enable(void *garbage)
 163 {
 164         return 0;
 165 }
 166
 167 void kvm_arch_hardware_disable(void *garbage)
 168 {
 169 }
 170
 171 int kvm_arch_hardware_setup(void)
 172 {
 173         return 0;
 174 }
 175
 176 void kvm_arch_hardware_unsetup(void)
 177 {
 178 }
 179
 180 void kvm_arch_check_processor_compat(void *rtn)
 181 {
 182         *(int *)rtn = kvmppc_core_check_processor_compat();
 183 }
 184
 185 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 186 {
 187         if (type)
 188                 return -EINVAL;
 189
 190         return kvmppc_core_init_vm(kvm);
 191 }
 192
 193 void kvm_arch_destroy_vm(struct kvm *kvm)
 194 {
 195         unsigned int i;
 196         struct kvm_vcpu *vcpu;
 197
 198         kvm_for_each_vcpu(i, vcpu, kvm)
 199                 kvm_arch_vcpu_free(vcpu);
 200
 201         mutex_lock(&kvm->lock);
 202         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 203                 kvm->vcpus[i] = NULL;
 204
 205         atomic_set(&kvm->online_vcpus, 0);
 206
 207         kvmppc_core_destroy_vm(kvm);
 208
 209         mutex_unlock(&kvm->lock);
 210 }
 211
 212 void kvm_arch_sync_events(struct kvm *kvm)
 213 {
 214 }
 215
 216 int kvm_dev_ioctl_check_extension(long ext)
 217 {
 218         int r;
 219
 220         switch (ext) {
 221 #ifdef CONFIG_BOOKE
 222         case KVM_CAP_PPC_BOOKE_SREGS:
 223 #else
 224         case KVM_CAP_PPC_SEGSTATE:
 225         case KVM_CAP_PPC_HIOR:
 226         case KVM_CAP_PPC_PAPR:
 227 #endif
 228         case KVM_CAP_PPC_UNSET_IRQ:
 229         case KVM_CAP_PPC_IRQ_LEVEL:
 230         case KVM_CAP_ENABLE_CAP:
 231         case KVM_CAP_ONE_REG:
 232                 r = 1;
 233                 break;
 234 #ifndef CONFIG_KVM_BOOK3S_64_HV
 235         case KVM_CAP_PPC_PAIRED_SINGLES:
 236         case KVM_CAP_PPC_OSI:
 237         case KVM_CAP_PPC_GET_PVINFO:
 238 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 239         case KVM_CAP_SW_TLB:
 240 #endif
 241                 r = 1;
 242                 break;
 243         case KVM_CAP_COALESCED_MMIO:
 244                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 245                 break;
 246 #endif
 247 #ifdef CONFIG_PPC_BOOK3S_64
 248         case KVM_CAP_SPAPR_TCE:
 249         case KVM_CAP_PPC_ALLOC_HTAB:
 250                 r = 1;
 251                 break;
 252 #endif /* CONFIG_PPC_BOOK3S_64 */
 253 #ifdef CONFIG_KVM_BOOK3S_64_HV
 254         case KVM_CAP_PPC_SMT:
 255                 r = threads_per_core;
 256                 break;
 257         case KVM_CAP_PPC_RMA:
 258                 r = 1;
 259                 /* PPC970 requires an RMA */
 260                 if (cpu_has_feature(CPU_FTR_ARCH_201))
 261                         r = 2;
 262                 break;
 263         case KVM_CAP_SYNC_MMU:
 264                 r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
 265                 break;
 266 #endif
 267         case KVM_CAP_NR_VCPUS:
 268                 /*
 269                  * Recommending a number of CPUs is somewhat arbitrary; we
 270                  * return the number of present CPUs for -HV (since a host
 271                  * will have secondary threads "offline"), and for other KVM
 272                  * implementations just count online CPUs.
 273                  */
 274 #ifdef CONFIG_KVM_BOOK3S_64_HV
 275                 r = num_present_cpus();
 276 #else
 277                 r = num_online_cpus();
 278 #endif
 279                 break;
 280         case KVM_CAP_MAX_VCPUS:
 281                 r = KVM_MAX_VCPUS;
 282                 break;
 283 #ifdef CONFIG_PPC_BOOK3S_64
 284         case KVM_CAP_PPC_GET_SMMU_INFO:
 285                 r = 1;
 286                 break;
 287 #endif
 288         default:
 289                 r = 0;
 290                 break;
 291         }
 292         return r;
 293
 294 }
 295
 296 long kvm_arch_dev_ioctl(struct file *filp,
 297                         unsigned int ioctl, unsigned long arg)
 298 {
 299         return -EINVAL;
 300 }
 301
 302 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
 303                            struct kvm_memory_slot *dont)
 304 {
 305 }
 306
 307 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
 308 {
 309         return 0;
 310 }
 311
 312 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 313                                    struct kvm_memory_slot *memslot,
 314                                    struct kvm_memory_slot old,
 315                                    struct kvm_userspace_memory_region *mem,
 316                                    int user_alloc)
 317 {
 318         return kvmppc_core_prepare_memory_region(kvm, mem);
 319 }
 320
 321 void kvm_arch_commit_memory_region(struct kvm *kvm,
 322                struct kvm_userspace_memory_region *mem,
 323                struct kvm_memory_slot old,
 324                int user_alloc)
 325 {
 326         kvmppc_core_commit_memory_region(kvm, mem);
 327 }
 328
 329
 330 void kvm_arch_flush_shadow(struct kvm *kvm)
 331 {
 332 }
 333
 334 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 335 {
 336         struct kvm_vcpu *vcpu;
 337         vcpu = kvmppc_core_vcpu_create(kvm, id);
 338         if (!IS_ERR(vcpu)) {
 339                 vcpu->arch.wqp = &vcpu->wq;
 340                 kvmppc_create_vcpu_debugfs(vcpu, id);
 341         }
 342         return vcpu;
 343 }
 344
 345 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 346 {
 347         /* Make sure we're not using the vcpu anymore */
 348         hrtimer_cancel(&vcpu->arch.dec_timer);
 349         tasklet_kill(&vcpu->arch.tasklet);
 350
 351         kvmppc_remove_vcpu_debugfs(vcpu);
 352         kvmppc_core_vcpu_free(vcpu);
 353 }
 354
 355 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 356 {
 357         kvm_arch_vcpu_free(vcpu);
 358 }
 359
 360 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 361 {
 362         return kvmppc_core_pending_dec(vcpu);
 363 }
 364
 365 /*
 366  * low level hrtimer wake routine. Because this runs in hardirq context
 367  * we schedule a tasklet to do the real work.
 368  */
 369 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 370 {
 371         struct kvm_vcpu *vcpu;
 372
 373         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 374         tasklet_schedule(&vcpu->arch.tasklet);
 375
 376         return HRTIMER_NORESTART;
 377 }
 378
 379 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 380 {
 381         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 382         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 383         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 384         vcpu->arch.dec_expires = ~(u64)0;
 385
 386 #ifdef CONFIG_KVM_EXIT_TIMING
 387         mutex_init(&vcpu->arch.exit_timing_lock);
 388 #endif
 389
 390         return 0;
 391 }
 392
 393 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 394 {
 395         kvmppc_mmu_destroy(vcpu);
 396 }
 397
 398 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 399 {
 400 #ifdef CONFIG_BOOKE
 401         /*
 402          * vrsave (formerly usprg0) isn't used by Linux, but may
 403          * be used by the guest.
 404          *
 405          * On non-booke this is associated with Altivec and
 406          * is handled by code in book3s.c.
 407          */
 408         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 409 #endif
 410         kvmppc_core_vcpu_load(vcpu, cpu);
 411         vcpu->cpu = smp_processor_id();
 412 }
 413
 414 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 415 {
 416         kvmppc_core_vcpu_put(vcpu);
 417 #ifdef CONFIG_BOOKE
 418         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 419 #endif
 420         vcpu->cpu = -1;
 421 }
 422
 423 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 424                                         struct kvm_guest_debug *dbg)
 425 {
 426         return -EINVAL;
 427 }
 428
 429 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 430                                      struct kvm_run *run)
 431 {
 432         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 433 }
 434
 435 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 436                                       struct kvm_run *run)
 437 {
 438         u64 uninitialized_var(gpr);
 439
 440         if (run->mmio.len > sizeof(gpr)) {
 441                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 442                 return;
 443         }
 444
 445         if (vcpu->arch.mmio_is_bigendian) {
 446                 switch (run->mmio.len) {
 447                 case 8: gpr = *(u64 *)run->mmio.data; break;
 448                 case 4: gpr = *(u32 *)run->mmio.data; break;
 449                 case 2: gpr = *(u16 *)run->mmio.data; break;
 450                 case 1: gpr = *(u8 *)run->mmio.data; break;
 451                 }
 452         } else {
 453                 /* Convert BE data from userland back to LE. */
 454                 switch (run->mmio.len) {
 455                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 456                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 457                 case 1: gpr = *(u8 *)run->mmio.data; break;
 458                 }
 459         }
 460
 461         if (vcpu->arch.mmio_sign_extend) {
 462                 switch (run->mmio.len) {
 463 #ifdef CONFIG_PPC64
 464                 case 4:
 465                         gpr = (s64)(s32)gpr;
 466                         break;
 467 #endif
 468                 case 2:
 469                         gpr = (s64)(s16)gpr;
 470                         break;
 471                 case 1:
 472                         gpr = (s64)(s8)gpr;
 473                         break;
 474                 }
 475         }
 476
 477         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 478
 479         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
 480         case KVM_MMIO_REG_GPR:
 481                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 482                 break;
 483         case KVM_MMIO_REG_FPR:
 484                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 485                 break;
 486 #ifdef CONFIG_PPC_BOOK3S
 487         case KVM_MMIO_REG_QPR:
 488                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 489                 break;
 490         case KVM_MMIO_REG_FQPR:
 491                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 492                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 493                 break;
 494 #endif
 495         default:
 496                 BUG();
 497         }
 498 }
 499
 500 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 501                        unsigned int rt, unsigned int bytes, int is_bigendian)
 502 {
 503         if (bytes > sizeof(run->mmio.data)) {
 504                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 505                        run->mmio.len);
 506         }
 507
 508         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 509         run->mmio.len = bytes;
 510         run->mmio.is_write = 0;
 511
 512         vcpu->arch.io_gpr = rt;
 513         vcpu->arch.mmio_is_bigendian = is_bigendian;
 514         vcpu->mmio_needed = 1;
 515         vcpu->mmio_is_write = 0;
 516         vcpu->arch.mmio_sign_extend = 0;
 517
 518         return EMULATE_DO_MMIO;
 519 }
 520
 521 /* Same as above, but sign extends */
 522 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 523                         unsigned int rt, unsigned int bytes, int is_bigendian)
 524 {
 525         int r;
 526
 527         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
 528         vcpu->arch.mmio_sign_extend = 1;
 529
 530         return r;
 531 }
 532
 533 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 534                         u64 val, unsigned int bytes, int is_bigendian)
 535 {
 536         void *data = run->mmio.data;
 537
 538         if (bytes > sizeof(run->mmio.data)) {
 539                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 540                        run->mmio.len);
 541         }
 542
 543         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 544         run->mmio.len = bytes;
 545         run->mmio.is_write = 1;
 546         vcpu->mmio_needed = 1;
 547         vcpu->mmio_is_write = 1;
 548
 549         /* Store the value at the lowest bytes in 'data'. */
 550         if (is_bigendian) {
 551                 switch (bytes) {
 552                 case 8: *(u64 *)data = val; break;
 553                 case 4: *(u32 *)data = val; break;
 554                 case 2: *(u16 *)data = val; break;
 555                 case 1: *(u8  *)data = val; break;
 556                 }
 557         } else {
 558                 /* Store LE value into 'data'. */
 559                 switch (bytes) {
 560                 case 4: st_le32(data, val); break;
 561                 case 2: st_le16(data, val); break;
 562                 case 1: *(u8 *)data = val; break;
 563                 }
 564         }
 565
 566         return EMULATE_DO_MMIO;
 567 }
 568
 569 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 570 {
 571         int r;
 572         sigset_t sigsaved;
 573
 574         if (vcpu->sigset_active)
 575                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 576
 577         if (vcpu->mmio_needed) {
 578                 if (!vcpu->mmio_is_write)
 579                         kvmppc_complete_mmio_load(vcpu, run);
 580                 vcpu->mmio_needed = 0;
 581         } else if (vcpu->arch.dcr_needed) {
 582                 if (!vcpu->arch.dcr_is_write)
 583                         kvmppc_complete_dcr_load(vcpu, run);
 584                 vcpu->arch.dcr_needed = 0;
 585         } else if (vcpu->arch.osi_needed) {
 586                 u64 *gprs = run->osi.gprs;
 587                 int i;
 588
 589                 for (i = 0; i < 32; i++)
 590                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 591                 vcpu->arch.osi_needed = 0;
 592         } else if (vcpu->arch.hcall_needed) {
 593                 int i;
 594
 595                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 596                 for (i = 0; i < 9; ++i)
 597                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 598                 vcpu->arch.hcall_needed = 0;
 599         }
 600
 601         r = kvmppc_vcpu_run(run, vcpu);
 602
 603         if (vcpu->sigset_active)
 604                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 605
 606         return r;
 607 }
 608
 609 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 610 {
 611         if (irq->irq == KVM_INTERRUPT_UNSET) {
 612                 kvmppc_core_dequeue_external(vcpu, irq);
 613                 return 0;
 614         }
 615
 616         kvmppc_core_queue_external(vcpu, irq);
 617
 618         kvm_vcpu_kick(vcpu);
 619
 620         return 0;
 621 }
 622
 623 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 624                                      struct kvm_enable_cap *cap)
 625 {
 626         int r;
 627
 628         if (cap->flags)
 629                 return -EINVAL;
 630
 631         switch (cap->cap) {
 632         case KVM_CAP_PPC_OSI:
 633                 r = 0;
 634                 vcpu->arch.osi_enabled = true;
 635                 break;
 636         case KVM_CAP_PPC_PAPR:
 637                 r = 0;
 638                 vcpu->arch.papr_enabled = true;
 639                 break;
 640 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 641         case KVM_CAP_SW_TLB: {
 642                 struct kvm_config_tlb cfg;
 643                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
 644
 645                 r = -EFAULT;
 646                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
 647                         break;
 648
 649                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
 650                 break;
 651         }
 652 #endif
 653         default:
 654                 r = -EINVAL;
 655                 break;
 656         }
 657
 658         if (!r)
 659                 r = kvmppc_sanity_check(vcpu);
 660
 661         return r;
 662 }
 663
 664 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 665                                     struct kvm_mp_state *mp_state)
 666 {
 667         return -EINVAL;
 668 }
 669
 670 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 671                                     struct kvm_mp_state *mp_state)
 672 {
 673         return -EINVAL;
 674 }
 675
 676 long kvm_arch_vcpu_ioctl(struct file *filp,
 677                          unsigned int ioctl, unsigned long arg)
 678 {
 679         struct kvm_vcpu *vcpu = filp->private_data;
 680         void __user *argp = (void __user *)arg;
 681         long r;
 682
 683         switch (ioctl) {
 684         case KVM_INTERRUPT: {
 685                 struct kvm_interrupt irq;
 686                 r = -EFAULT;
 687                 if (copy_from_user(&irq, argp, sizeof(irq)))
 688                         goto out;
 689                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
 690                 goto out;
 691         }
 692
 693         case KVM_ENABLE_CAP:
 694         {
 695                 struct kvm_enable_cap cap;
 696                 r = -EFAULT;
 697                 if (copy_from_user(&cap, argp, sizeof(cap)))
 698                         goto out;
 699                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
 700                 break;
 701         }
 702
 703         case KVM_SET_ONE_REG:
 704         case KVM_GET_ONE_REG:
 705         {
 706                 struct kvm_one_reg reg;
 707                 r = -EFAULT;
 708                 if (copy_from_user(&reg, argp, sizeof(reg)))
 709                         goto out;
 710                 if (ioctl == KVM_SET_ONE_REG)
 711                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
 712                 else
 713                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
 714                 break;
 715         }
 716
 717 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 718         case KVM_DIRTY_TLB: {
 719                 struct kvm_dirty_tlb dirty;
 720                 r = -EFAULT;
 721                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
 722                         goto out;
 723                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
 724                 break;
 725         }
 726 #endif
 727         default:
 728                 r = -EINVAL;
 729         }
 730
 731 out:
 732         return r;
 733 }
 734
 735 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
 736 {
 737         return VM_FAULT_SIGBUS;
 738 }
 739
 740 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
 741 {
 742         u32 inst_lis = 0x3c000000;
 743         u32 inst_ori = 0x60000000;
 744         u32 inst_nop = 0x60000000;
 745         u32 inst_sc = 0x44000002;
 746         u32 inst_imm_mask = 0xffff;
 747
 748         /*
 749          * The hypercall to get into KVM from within guest context is as
 750          * follows:
 751          *
 752          *    lis r0, r0, KVM_SC_MAGIC_R0@h
 753          *    ori r0, KVM_SC_MAGIC_R0@l
 754          *    sc
 755          *    nop
 756          */
 757         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
 758         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
 759         pvinfo->hcall[2] = inst_sc;
 760         pvinfo->hcall[3] = inst_nop;
 761
 762         return 0;
 763 }
 764
 765 long kvm_arch_vm_ioctl(struct file *filp,
 766                        unsigned int ioctl, unsigned long arg)
 767 {
 768         void __user *argp = (void __user *)arg;
 769         long r;
 770
 771         switch (ioctl) {
 772         case KVM_PPC_GET_PVINFO: {
 773                 struct kvm_ppc_pvinfo pvinfo;
 774                 memset(&pvinfo, 0, sizeof(pvinfo));
 775                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
 776                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
 777                         r = -EFAULT;
 778                         goto out;
 779                 }
 780
 781                 break;
 782         }
 783 #ifdef CONFIG_PPC_BOOK3S_64
 784         case KVM_CREATE_SPAPR_TCE: {
 785                 struct kvm_create_spapr_tce create_tce;
 786                 struct kvm *kvm = filp->private_data;
 787
 788                 r = -EFAULT;
 789                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
 790                         goto out;
 791                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
 792                 goto out;
 793         }
 794 #endif /* CONFIG_PPC_BOOK3S_64 */
 795
 796 #ifdef CONFIG_KVM_BOOK3S_64_HV
 797         case KVM_ALLOCATE_RMA: {
 798                 struct kvm *kvm = filp->private_data;
 799                 struct kvm_allocate_rma rma;
 800
 801                 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
 802                 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
 803                         r = -EFAULT;
 804                 break;
 805         }
 806
 807         case KVM_PPC_ALLOCATE_HTAB: {
 808                 struct kvm *kvm = filp->private_data;
 809                 u32 htab_order;
 810
 811                 r = -EFAULT;
 812                 if (get_user(htab_order, (u32 __user *)argp))
 813                         break;
 814                 r = kvmppc_alloc_reset_hpt(kvm, &htab_order);
 815                 if (r)
 816                         break;
 817                 r = -EFAULT;
 818                 if (put_user(htab_order, (u32 __user *)argp))
 819                         break;
 820                 r = 0;
 821                 break;
 822         }
 823 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 824
 825 #ifdef CONFIG_PPC_BOOK3S_64
 826         case KVM_PPC_GET_SMMU_INFO: {
 827                 struct kvm *kvm = filp->private_data;
 828                 struct kvm_ppc_smmu_info info;
 829
 830                 memset(&info, 0, sizeof(info));
 831                 r = kvm_vm_ioctl_get_smmu_info(kvm, &info);
 832                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
 833                         r = -EFAULT;
 834                 break;
 835         }
 836 #endif /* CONFIG_PPC_BOOK3S_64 */
 837         default:
 838                 r = -ENOTTY;
 839         }
 840
 841 out:
 842         return r;
 843 }
 844
 845 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
 846 static unsigned long nr_lpids;
 847
 848 long kvmppc_alloc_lpid(void)
 849 {
 850         long lpid;
 851
 852         do {
 853                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
 854                 if (lpid >= nr_lpids) {
 855                         pr_err("%s: No LPIDs free\n", __func__);
 856                         return -ENOMEM;
 857                 }
 858         } while (test_and_set_bit(lpid, lpid_inuse));
 859
 860         return lpid;
 861 }
 862
 863 void kvmppc_claim_lpid(long lpid)
 864 {
 865         set_bit(lpid, lpid_inuse);
 866 }
 867
 868 void kvmppc_free_lpid(long lpid)
 869 {
 870         clear_bit(lpid, lpid_inuse);
 871 }
 872
 873 void kvmppc_init_lpid(unsigned long nr_lpids_param)
 874 {
 875         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
 876         memset(lpid_inuse, 0, sizeof(lpid_inuse));
 877 }
 878
 879 int kvm_arch_init(void *opaque)
 880 {
 881         return 0;
 882 }
 883
 884 void kvm_arch_exit(void)
 885 {
 886 }