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