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.pending_exceptions) ||
  42                v->requests;
  43 }
  44
  45 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  46 {
  47         return 1;
  48 }
  49
  50 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
  51 {
  52         int nr = kvmppc_get_gpr(vcpu, 11);
  53         int r;
  54         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
  55         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
  56         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
  57         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
  58         unsigned long r2 = 0;
  59
  60         if (!(vcpu->arch.shared->msr & MSR_SF)) {
  61                 /* 32 bit mode */
  62                 param1 &= 0xffffffff;
  63                 param2 &= 0xffffffff;
  64                 param3 &= 0xffffffff;
  65                 param4 &= 0xffffffff;
  66         }
  67
  68         switch (nr) {
  69         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
  70         {
  71                 vcpu->arch.magic_page_pa = param1;
  72                 vcpu->arch.magic_page_ea = param2;
  73
  74                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
  75
  76                 r = EV_SUCCESS;
  77                 break;
  78         }
  79         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
  80                 r = EV_SUCCESS;
  81 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
  82                 /* XXX Missing magic page on 44x */
  83                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
  84 #endif
  85
  86                 /* Second return value is in r4 */
  87                 break;
  88         case EV_HCALL_TOKEN(EV_IDLE):
  89                 r = EV_SUCCESS;
  90                 kvm_vcpu_block(vcpu);
  91                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
  92                 break;
  93         default:
  94                 r = EV_UNIMPLEMENTED;
  95                 break;
  96         }
  97
  98         kvmppc_set_gpr(vcpu, 4, r2);
  99
 100         return r;
 101 }
 102
 103 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 104 {
 105         int r = false;
 106
 107         /* We have to know what CPU to virtualize */
 108         if (!vcpu->arch.pvr)
 109                 goto out;
 110
 111         /* PAPR only works with book3s_64 */
 112         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 113                 goto out;
 114
 115 #ifdef CONFIG_KVM_BOOK3S_64_HV
 116         /* HV KVM can only do PAPR mode for now */
 117         if (!vcpu->arch.papr_enabled)
 118                 goto out;
 119 #endif
 120
 121 #ifdef CONFIG_KVM_BOOKE_HV
 122         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 123                 goto out;
 124 #endif
 125
 126         r = true;
 127
 128 out:
 129         vcpu->arch.sane = r;
 130         return r ? 0 : -EINVAL;
 131 }
 132
 133 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 134 {
 135         enum emulation_result er;
 136         int r;
 137
 138         er = kvmppc_emulate_instruction(run, vcpu);
 139         switch (er) {
 140         case EMULATE_DONE:
 141                 /* Future optimization: only reload non-volatiles if they were
 142                  * actually modified. */
 143                 r = RESUME_GUEST_NV;
 144                 break;
 145         case EMULATE_DO_MMIO:
 146                 run->exit_reason = KVM_EXIT_MMIO;
 147                 /* We must reload nonvolatiles because "update" load/store
 148                  * instructions modify register state. */
 149                 /* Future optimization: only reload non-volatiles if they were
 150                  * actually modified. */
 151                 r = RESUME_HOST_NV;
 152                 break;
 153         case EMULATE_FAIL:
 154                 /* XXX Deliver Program interrupt to guest. */
 155                 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
 156                        kvmppc_get_last_inst(vcpu));
 157                 r = RESUME_HOST;
 158                 break;
 159         default:
 160                 BUG();
 161         }
 162
 163         return r;
 164 }
 165
 166 int kvm_arch_hardware_enable(void *garbage)
 167 {
 168         return 0;
 169 }
 170
 171 void kvm_arch_hardware_disable(void *garbage)
 172 {
 173 }
 174
 175 int kvm_arch_hardware_setup(void)
 176 {
 177         return 0;
 178 }
 179
 180 void kvm_arch_hardware_unsetup(void)
 181 {
 182 }
 183
 184 void kvm_arch_check_processor_compat(void *rtn)
 185 {
 186         *(int *)rtn = kvmppc_core_check_processor_compat();
 187 }
 188
 189 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 190 {
 191         if (type)
 192                 return -EINVAL;
 193
 194         return kvmppc_core_init_vm(kvm);
 195 }
 196
 197 void kvm_arch_destroy_vm(struct kvm *kvm)
 198 {
 199         unsigned int i;
 200         struct kvm_vcpu *vcpu;
 201
 202         kvm_for_each_vcpu(i, vcpu, kvm)
 203                 kvm_arch_vcpu_free(vcpu);
 204
 205         mutex_lock(&kvm->lock);
 206         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 207                 kvm->vcpus[i] = NULL;
 208
 209         atomic_set(&kvm->online_vcpus, 0);
 210
 211         kvmppc_core_destroy_vm(kvm);
 212
 213         mutex_unlock(&kvm->lock);
 214 }
 215
 216 void kvm_arch_sync_events(struct kvm *kvm)
 217 {
 218 }
 219
 220 int kvm_dev_ioctl_check_extension(long ext)
 221 {
 222         int r;
 223
 224         switch (ext) {
 225 #ifdef CONFIG_BOOKE
 226         case KVM_CAP_PPC_BOOKE_SREGS:
 227 #else
 228         case KVM_CAP_PPC_SEGSTATE:
 229         case KVM_CAP_PPC_HIOR:
 230         case KVM_CAP_PPC_PAPR:
 231 #endif
 232         case KVM_CAP_PPC_UNSET_IRQ:
 233         case KVM_CAP_PPC_IRQ_LEVEL:
 234         case KVM_CAP_ENABLE_CAP:
 235         case KVM_CAP_ONE_REG:
 236                 r = 1;
 237                 break;
 238 #ifndef CONFIG_KVM_BOOK3S_64_HV
 239         case KVM_CAP_PPC_PAIRED_SINGLES:
 240         case KVM_CAP_PPC_OSI:
 241         case KVM_CAP_PPC_GET_PVINFO:
 242 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 243         case KVM_CAP_SW_TLB:
 244 #endif
 245                 r = 1;
 246                 break;
 247         case KVM_CAP_COALESCED_MMIO:
 248                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 249                 break;
 250 #endif
 251 #ifdef CONFIG_PPC_BOOK3S_64
 252         case KVM_CAP_SPAPR_TCE:
 253         case KVM_CAP_PPC_ALLOC_HTAB:
 254                 r = 1;
 255                 break;
 256 #endif /* CONFIG_PPC_BOOK3S_64 */
 257 #ifdef CONFIG_KVM_BOOK3S_64_HV
 258         case KVM_CAP_PPC_SMT:
 259                 r = threads_per_core;
 260                 break;
 261         case KVM_CAP_PPC_RMA:
 262                 r = 1;
 263                 /* PPC970 requires an RMA */
 264                 if (cpu_has_feature(CPU_FTR_ARCH_201))
 265                         r = 2;
 266                 break;
 267         case KVM_CAP_SYNC_MMU:
 268                 r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
 269                 break;
 270 #endif
 271         case KVM_CAP_NR_VCPUS:
 272                 /*
 273                  * Recommending a number of CPUs is somewhat arbitrary; we
 274                  * return the number of present CPUs for -HV (since a host
 275                  * will have secondary threads "offline"), and for other KVM
 276                  * implementations just count online CPUs.
 277                  */
 278 #ifdef CONFIG_KVM_BOOK3S_64_HV
 279                 r = num_present_cpus();
 280 #else
 281                 r = num_online_cpus();
 282 #endif
 283                 break;
 284         case KVM_CAP_MAX_VCPUS:
 285                 r = KVM_MAX_VCPUS;
 286                 break;
 287 #ifdef CONFIG_PPC_BOOK3S_64
 288         case KVM_CAP_PPC_GET_SMMU_INFO:
 289                 r = 1;
 290                 break;
 291 #endif
 292         default:
 293                 r = 0;
 294                 break;
 295         }
 296         return r;
 297
 298 }
 299
 300 long kvm_arch_dev_ioctl(struct file *filp,
 301                         unsigned int ioctl, unsigned long arg)
 302 {
 303         return -EINVAL;
 304 }
 305
 306 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
 307                            struct kvm_memory_slot *dont)
 308 {
 309         if (!dont || free->arch.rmap != dont->arch.rmap) {
 310                 vfree(free->arch.rmap);
 311                 free->arch.rmap = NULL;
 312         }
 313 }
 314
 315 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
 316 {
 317         slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap));
 318         if (!slot->arch.rmap)
 319                 return -ENOMEM;
 320
 321         return 0;
 322 }
 323
 324 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 325                                    struct kvm_memory_slot *memslot,
 326                                    struct kvm_memory_slot old,
 327                                    struct kvm_userspace_memory_region *mem,
 328                                    int user_alloc)
 329 {
 330         return kvmppc_core_prepare_memory_region(kvm, mem);
 331 }
 332
 333 void kvm_arch_commit_memory_region(struct kvm *kvm,
 334                struct kvm_userspace_memory_region *mem,
 335                struct kvm_memory_slot old,
 336                int user_alloc)
 337 {
 338         kvmppc_core_commit_memory_region(kvm, mem);
 339 }
 340
 341 void kvm_arch_flush_shadow_all(struct kvm *kvm)
 342 {
 343 }
 344
 345 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 346                                    struct kvm_memory_slot *slot)
 347 {
 348 }
 349
 350 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 351 {
 352         struct kvm_vcpu *vcpu;
 353         vcpu = kvmppc_core_vcpu_create(kvm, id);
 354         if (!IS_ERR(vcpu)) {
 355                 vcpu->arch.wqp = &vcpu->wq;
 356                 kvmppc_create_vcpu_debugfs(vcpu, id);
 357         }
 358         return vcpu;
 359 }
 360
 361 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 362 {
 363         /* Make sure we're not using the vcpu anymore */
 364         hrtimer_cancel(&vcpu->arch.dec_timer);
 365         tasklet_kill(&vcpu->arch.tasklet);
 366
 367         kvmppc_remove_vcpu_debugfs(vcpu);
 368         kvmppc_core_vcpu_free(vcpu);
 369 }
 370
 371 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 372 {
 373         kvm_arch_vcpu_free(vcpu);
 374 }
 375
 376 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 377 {
 378         return kvmppc_core_pending_dec(vcpu);
 379 }
 380
 381 /*
 382  * low level hrtimer wake routine. Because this runs in hardirq context
 383  * we schedule a tasklet to do the real work.
 384  */
 385 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 386 {
 387         struct kvm_vcpu *vcpu;
 388
 389         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 390         tasklet_schedule(&vcpu->arch.tasklet);
 391
 392         return HRTIMER_NORESTART;
 393 }
 394
 395 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 396 {
 397         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 398         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 399         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 400         vcpu->arch.dec_expires = ~(u64)0;
 401
 402 #ifdef CONFIG_KVM_EXIT_TIMING
 403         mutex_init(&vcpu->arch.exit_timing_lock);
 404 #endif
 405
 406         return 0;
 407 }
 408
 409 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 410 {
 411         kvmppc_mmu_destroy(vcpu);
 412 }
 413
 414 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 415 {
 416 #ifdef CONFIG_BOOKE
 417         /*
 418          * vrsave (formerly usprg0) isn't used by Linux, but may
 419          * be used by the guest.
 420          *
 421          * On non-booke this is associated with Altivec and
 422          * is handled by code in book3s.c.
 423          */
 424         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 425 #endif
 426         kvmppc_core_vcpu_load(vcpu, cpu);
 427         vcpu->cpu = smp_processor_id();
 428 }
 429
 430 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 431 {
 432         kvmppc_core_vcpu_put(vcpu);
 433 #ifdef CONFIG_BOOKE
 434         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 435 #endif
 436         vcpu->cpu = -1;
 437 }
 438
 439 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 440                                         struct kvm_guest_debug *dbg)
 441 {
 442         return -EINVAL;
 443 }
 444
 445 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 446                                      struct kvm_run *run)
 447 {
 448         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 449 }
 450
 451 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 452                                       struct kvm_run *run)
 453 {
 454         u64 uninitialized_var(gpr);
 455
 456         if (run->mmio.len > sizeof(gpr)) {
 457                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 458                 return;
 459         }
 460
 461         if (vcpu->arch.mmio_is_bigendian) {
 462                 switch (run->mmio.len) {
 463                 case 8: gpr = *(u64 *)run->mmio.data; break;
 464                 case 4: gpr = *(u32 *)run->mmio.data; break;
 465                 case 2: gpr = *(u16 *)run->mmio.data; break;
 466                 case 1: gpr = *(u8 *)run->mmio.data; break;
 467                 }
 468         } else {
 469                 /* Convert BE data from userland back to LE. */
 470                 switch (run->mmio.len) {
 471                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 472                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 473                 case 1: gpr = *(u8 *)run->mmio.data; break;
 474                 }
 475         }
 476
 477         if (vcpu->arch.mmio_sign_extend) {
 478                 switch (run->mmio.len) {
 479 #ifdef CONFIG_PPC64
 480                 case 4:
 481                         gpr = (s64)(s32)gpr;
 482                         break;
 483 #endif
 484                 case 2:
 485                         gpr = (s64)(s16)gpr;
 486                         break;
 487                 case 1:
 488                         gpr = (s64)(s8)gpr;
 489                         break;
 490                 }
 491         }
 492
 493         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 494
 495         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
 496         case KVM_MMIO_REG_GPR:
 497                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 498                 break;
 499         case KVM_MMIO_REG_FPR:
 500                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 501                 break;
 502 #ifdef CONFIG_PPC_BOOK3S
 503         case KVM_MMIO_REG_QPR:
 504                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 505                 break;
 506         case KVM_MMIO_REG_FQPR:
 507                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 508                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 509                 break;
 510 #endif
 511         default:
 512                 BUG();
 513         }
 514 }
 515
 516 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 517                        unsigned int rt, unsigned int bytes, int is_bigendian)
 518 {
 519         if (bytes > sizeof(run->mmio.data)) {
 520                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 521                        run->mmio.len);
 522         }
 523
 524         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 525         run->mmio.len = bytes;
 526         run->mmio.is_write = 0;
 527
 528         vcpu->arch.io_gpr = rt;
 529         vcpu->arch.mmio_is_bigendian = is_bigendian;
 530         vcpu->mmio_needed = 1;
 531         vcpu->mmio_is_write = 0;
 532         vcpu->arch.mmio_sign_extend = 0;
 533
 534         return EMULATE_DO_MMIO;
 535 }
 536
 537 /* Same as above, but sign extends */
 538 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 539                         unsigned int rt, unsigned int bytes, int is_bigendian)
 540 {
 541         int r;
 542
 543         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
 544         vcpu->arch.mmio_sign_extend = 1;
 545
 546         return r;
 547 }
 548
 549 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 550                         u64 val, unsigned int bytes, int is_bigendian)
 551 {
 552         void *data = run->mmio.data;
 553
 554         if (bytes > sizeof(run->mmio.data)) {
 555                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 556                        run->mmio.len);
 557         }
 558
 559         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 560         run->mmio.len = bytes;
 561         run->mmio.is_write = 1;
 562         vcpu->mmio_needed = 1;
 563         vcpu->mmio_is_write = 1;
 564
 565         /* Store the value at the lowest bytes in 'data'. */
 566         if (is_bigendian) {
 567                 switch (bytes) {
 568                 case 8: *(u64 *)data = val; break;
 569                 case 4: *(u32 *)data = val; break;
 570                 case 2: *(u16 *)data = val; break;
 571                 case 1: *(u8  *)data = val; break;
 572                 }
 573         } else {
 574                 /* Store LE value into 'data'. */
 575                 switch (bytes) {
 576                 case 4: st_le32(data, val); break;
 577                 case 2: st_le16(data, val); break;
 578                 case 1: *(u8 *)data = val; break;
 579                 }
 580         }
 581
 582         return EMULATE_DO_MMIO;
 583 }
 584
 585 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 586 {
 587         int r;
 588         sigset_t sigsaved;
 589
 590         if (vcpu->sigset_active)
 591                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 592
 593         if (vcpu->mmio_needed) {
 594                 if (!vcpu->mmio_is_write)
 595                         kvmppc_complete_mmio_load(vcpu, run);
 596                 vcpu->mmio_needed = 0;
 597         } else if (vcpu->arch.dcr_needed) {
 598                 if (!vcpu->arch.dcr_is_write)
 599                         kvmppc_complete_dcr_load(vcpu, run);
 600                 vcpu->arch.dcr_needed = 0;
 601         } else if (vcpu->arch.osi_needed) {
 602                 u64 *gprs = run->osi.gprs;
 603                 int i;
 604
 605                 for (i = 0; i < 32; i++)
 606                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 607                 vcpu->arch.osi_needed = 0;
 608         } else if (vcpu->arch.hcall_needed) {
 609                 int i;
 610
 611                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 612                 for (i = 0; i < 9; ++i)
 613                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 614                 vcpu->arch.hcall_needed = 0;
 615         }
 616
 617         r = kvmppc_vcpu_run(run, vcpu);
 618
 619         if (vcpu->sigset_active)
 620                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 621
 622         return r;
 623 }
 624
 625 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 626 {
 627         if (irq->irq == KVM_INTERRUPT_UNSET) {
 628                 kvmppc_core_dequeue_external(vcpu, irq);
 629                 return 0;
 630         }
 631
 632         kvmppc_core_queue_external(vcpu, irq);
 633
 634         kvm_vcpu_kick(vcpu);
 635
 636         return 0;
 637 }
 638
 639 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 640                                      struct kvm_enable_cap *cap)
 641 {
 642         int r;
 643
 644         if (cap->flags)
 645                 return -EINVAL;
 646
 647         switch (cap->cap) {
 648         case KVM_CAP_PPC_OSI:
 649                 r = 0;
 650                 vcpu->arch.osi_enabled = true;
 651                 break;
 652         case KVM_CAP_PPC_PAPR:
 653                 r = 0;
 654                 vcpu->arch.papr_enabled = true;
 655                 break;
 656 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 657         case KVM_CAP_SW_TLB: {
 658                 struct kvm_config_tlb cfg;
 659                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
 660
 661                 r = -EFAULT;
 662                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
 663                         break;
 664
 665                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
 666                 break;
 667         }
 668 #endif
 669         default:
 670                 r = -EINVAL;
 671                 break;
 672         }
 673
 674         if (!r)
 675                 r = kvmppc_sanity_check(vcpu);
 676
 677         return r;
 678 }
 679
 680 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 681                                     struct kvm_mp_state *mp_state)
 682 {
 683         return -EINVAL;
 684 }
 685
 686 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 687                                     struct kvm_mp_state *mp_state)
 688 {
 689         return -EINVAL;
 690 }
 691
 692 long kvm_arch_vcpu_ioctl(struct file *filp,
 693                          unsigned int ioctl, unsigned long arg)
 694 {
 695         struct kvm_vcpu *vcpu = filp->private_data;
 696         void __user *argp = (void __user *)arg;
 697         long r;
 698
 699         switch (ioctl) {
 700         case KVM_INTERRUPT: {
 701                 struct kvm_interrupt irq;
 702                 r = -EFAULT;
 703                 if (copy_from_user(&irq, argp, sizeof(irq)))
 704                         goto out;
 705                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
 706                 goto out;
 707         }
 708
 709         case KVM_ENABLE_CAP:
 710         {
 711                 struct kvm_enable_cap cap;
 712                 r = -EFAULT;
 713                 if (copy_from_user(&cap, argp, sizeof(cap)))
 714                         goto out;
 715                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
 716                 break;
 717         }
 718
 719         case KVM_SET_ONE_REG:
 720         case KVM_GET_ONE_REG:
 721         {
 722                 struct kvm_one_reg reg;
 723                 r = -EFAULT;
 724                 if (copy_from_user(&reg, argp, sizeof(reg)))
 725                         goto out;
 726                 if (ioctl == KVM_SET_ONE_REG)
 727                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
 728                 else
 729                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
 730                 break;
 731         }
 732
 733 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 734         case KVM_DIRTY_TLB: {
 735                 struct kvm_dirty_tlb dirty;
 736                 r = -EFAULT;
 737                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
 738                         goto out;
 739                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
 740                 break;
 741         }
 742 #endif
 743         default:
 744                 r = -EINVAL;
 745         }
 746
 747 out:
 748         return r;
 749 }
 750
 751 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
 752 {
 753         return VM_FAULT_SIGBUS;
 754 }
 755
 756 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
 757 {
 758         u32 inst_nop = 0x60000000;
 759 #ifdef CONFIG_KVM_BOOKE_HV
 760         u32 inst_sc1 = 0x44000022;
 761         pvinfo->hcall[0] = inst_sc1;
 762         pvinfo->hcall[1] = inst_nop;
 763         pvinfo->hcall[2] = inst_nop;
 764         pvinfo->hcall[3] = inst_nop;
 765 #else
 766         u32 inst_lis = 0x3c000000;
 767         u32 inst_ori = 0x60000000;
 768         u32 inst_sc = 0x44000002;
 769         u32 inst_imm_mask = 0xffff;
 770
 771         /*
 772          * The hypercall to get into KVM from within guest context is as
 773          * follows:
 774          *
 775          *    lis r0, r0, KVM_SC_MAGIC_R0@h
 776          *    ori r0, KVM_SC_MAGIC_R0@l
 777          *    sc
 778          *    nop
 779          */
 780         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
 781         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
 782         pvinfo->hcall[2] = inst_sc;
 783         pvinfo->hcall[3] = inst_nop;
 784 #endif
 785
 786         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
 787
 788         return 0;
 789 }
 790
 791 long kvm_arch_vm_ioctl(struct file *filp,
 792                        unsigned int ioctl, unsigned long arg)
 793 {
 794         void __user *argp = (void __user *)arg;
 795         long r;
 796
 797         switch (ioctl) {
 798         case KVM_PPC_GET_PVINFO: {
 799                 struct kvm_ppc_pvinfo pvinfo;
 800                 memset(&pvinfo, 0, sizeof(pvinfo));
 801                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
 802                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
 803                         r = -EFAULT;
 804                         goto out;
 805                 }
 806
 807                 break;
 808         }
 809 #ifdef CONFIG_PPC_BOOK3S_64
 810         case KVM_CREATE_SPAPR_TCE: {
 811                 struct kvm_create_spapr_tce create_tce;
 812                 struct kvm *kvm = filp->private_data;
 813
 814                 r = -EFAULT;
 815                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
 816                         goto out;
 817                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
 818                 goto out;
 819         }
 820 #endif /* CONFIG_PPC_BOOK3S_64 */
 821
 822 #ifdef CONFIG_KVM_BOOK3S_64_HV
 823         case KVM_ALLOCATE_RMA: {
 824                 struct kvm *kvm = filp->private_data;
 825                 struct kvm_allocate_rma rma;
 826
 827                 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
 828                 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
 829                         r = -EFAULT;
 830                 break;
 831         }
 832
 833         case KVM_PPC_ALLOCATE_HTAB: {
 834                 struct kvm *kvm = filp->private_data;
 835                 u32 htab_order;
 836
 837                 r = -EFAULT;
 838                 if (get_user(htab_order, (u32 __user *)argp))
 839                         break;
 840                 r = kvmppc_alloc_reset_hpt(kvm, &htab_order);
 841                 if (r)
 842                         break;
 843                 r = -EFAULT;
 844                 if (put_user(htab_order, (u32 __user *)argp))
 845                         break;
 846                 r = 0;
 847                 break;
 848         }
 849 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 850
 851 #ifdef CONFIG_PPC_BOOK3S_64
 852         case KVM_PPC_GET_SMMU_INFO: {
 853                 struct kvm *kvm = filp->private_data;
 854                 struct kvm_ppc_smmu_info info;
 855
 856                 memset(&info, 0, sizeof(info));
 857                 r = kvm_vm_ioctl_get_smmu_info(kvm, &info);
 858                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
 859                         r = -EFAULT;
 860                 break;
 861         }
 862 #endif /* CONFIG_PPC_BOOK3S_64 */
 863         default:
 864                 r = -ENOTTY;
 865         }
 866
 867 out:
 868         return r;
 869 }
 870
 871 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
 872 static unsigned long nr_lpids;
 873
 874 long kvmppc_alloc_lpid(void)
 875 {
 876         long lpid;
 877
 878         do {
 879                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
 880                 if (lpid >= nr_lpids) {
 881                         pr_err("%s: No LPIDs free\n", __func__);
 882                         return -ENOMEM;
 883                 }
 884         } while (test_and_set_bit(lpid, lpid_inuse));
 885
 886         return lpid;
 887 }
 888
 889 void kvmppc_claim_lpid(long lpid)
 890 {
 891         set_bit(lpid, lpid_inuse);
 892 }
 893
 894 void kvmppc_free_lpid(long lpid)
 895 {
 896         clear_bit(lpid, lpid_inuse);
 897 }
 898
 899 void kvmppc_init_lpid(unsigned long nr_lpids_param)
 900 {
 901         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
 902         memset(lpid_inuse, 0, sizeof(lpid_inuse));
 903 }
 904
 905 int kvm_arch_init(void *opaque)
 906 {
 907         return 0;
 908 }
 909
 910 void kvm_arch_exit(void)
 911 {
 912 }