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 <linux/file.h>
  29 #include <linux/module.h>
  30 #include <asm/cputable.h>
  31 #include <asm/uaccess.h>
  32 #include <asm/kvm_ppc.h>
  33 #include <asm/tlbflush.h>
  34 #include <asm/cputhreads.h>
  35 #include <asm/irqflags.h>
  36 #include "timing.h"
  37 #include "irq.h"
  38 #include "../mm/mmu_decl.h"
  39
  40 #define CREATE_TRACE_POINTS
  41 #include "trace.h"
  42
  43 struct kvmppc_ops *kvmppc_hv_ops;
  44 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
  45 struct kvmppc_ops *kvmppc_pr_ops;
  46 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
  47
  48
  49 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  50 {
  51         return !!(v->arch.pending_exceptions) ||
  52                v->requests;
  53 }
  54
  55 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  56 {
  57         return 1;
  58 }
  59
  60 /*
  61  * Common checks before entering the guest world.  Call with interrupts
  62  * disabled.
  63  *
  64  * returns:
  65  *
  66  * == 1 if we're ready to go into guest state
  67  * <= 0 if we need to go back to the host with return value
  68  */
  69 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
  70 {
  71         int r;
  72
  73         WARN_ON(irqs_disabled());
  74         hard_irq_disable();
  75
  76         while (true) {
  77                 if (need_resched()) {
  78                         local_irq_enable();
  79                         cond_resched();
  80                         hard_irq_disable();
  81                         continue;
  82                 }
  83
  84                 if (signal_pending(current)) {
  85                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
  86                         vcpu->run->exit_reason = KVM_EXIT_INTR;
  87                         r = -EINTR;
  88                         break;
  89                 }
  90
  91                 vcpu->mode = IN_GUEST_MODE;
  92
  93                 /*
  94                  * Reading vcpu->requests must happen after setting vcpu->mode,
  95                  * so we don't miss a request because the requester sees
  96                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
  97                  * before next entering the guest (and thus doesn't IPI).
  98                  */
  99                 smp_mb();
 100
 101                 if (vcpu->requests) {
 102                         /* Make sure we process requests preemptable */
 103                         local_irq_enable();
 104                         trace_kvm_check_requests(vcpu);
 105                         r = kvmppc_core_check_requests(vcpu);
 106                         hard_irq_disable();
 107                         if (r > 0)
 108                                 continue;
 109                         break;
 110                 }
 111
 112                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 113                         /* interrupts got enabled in between, so we
 114                            are back at square 1 */
 115                         continue;
 116                 }
 117
 118                 kvm_guest_enter();
 119                 return 1;
 120         }
 121
 122         /* return to host */
 123         local_irq_enable();
 124         return r;
 125 }
 126 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
 127
 128 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
 129 {
 130         int nr = kvmppc_get_gpr(vcpu, 11);
 131         int r;
 132         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
 133         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
 134         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
 135         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
 136         unsigned long r2 = 0;
 137
 138         if (!(vcpu->arch.shared->msr & MSR_SF)) {
 139                 /* 32 bit mode */
 140                 param1 &= 0xffffffff;
 141                 param2 &= 0xffffffff;
 142                 param3 &= 0xffffffff;
 143                 param4 &= 0xffffffff;
 144         }
 145
 146         switch (nr) {
 147         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
 148         {
 149                 vcpu->arch.magic_page_pa = param1;
 150                 vcpu->arch.magic_page_ea = param2;
 151
 152                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
 153
 154                 r = EV_SUCCESS;
 155                 break;
 156         }
 157         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
 158                 r = EV_SUCCESS;
 159 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
 160                 /* XXX Missing magic page on 44x */
 161                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
 162 #endif
 163
 164                 /* Second return value is in r4 */
 165                 break;
 166         case EV_HCALL_TOKEN(EV_IDLE):
 167                 r = EV_SUCCESS;
 168                 kvm_vcpu_block(vcpu);
 169                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 170                 break;
 171         default:
 172                 r = EV_UNIMPLEMENTED;
 173                 break;
 174         }
 175
 176         kvmppc_set_gpr(vcpu, 4, r2);
 177
 178         return r;
 179 }
 180 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
 181
 182 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 183 {
 184         int r = false;
 185
 186         /* We have to know what CPU to virtualize */
 187         if (!vcpu->arch.pvr)
 188                 goto out;
 189
 190         /* PAPR only works with book3s_64 */
 191         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 192                 goto out;
 193
 194         /* HV KVM can only do PAPR mode for now */
 195         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
 196                 goto out;
 197
 198 #ifdef CONFIG_KVM_BOOKE_HV
 199         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 200                 goto out;
 201 #endif
 202
 203         r = true;
 204
 205 out:
 206         vcpu->arch.sane = r;
 207         return r ? 0 : -EINVAL;
 208 }
 209 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
 210
 211 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 212 {
 213         enum emulation_result er;
 214         int r;
 215
 216         er = kvmppc_emulate_instruction(run, vcpu);
 217         switch (er) {
 218         case EMULATE_DONE:
 219                 /* Future optimization: only reload non-volatiles if they were
 220                  * actually modified. */
 221                 r = RESUME_GUEST_NV;
 222                 break;
 223         case EMULATE_DO_MMIO:
 224                 run->exit_reason = KVM_EXIT_MMIO;
 225                 /* We must reload nonvolatiles because "update" load/store
 226                  * instructions modify register state. */
 227                 /* Future optimization: only reload non-volatiles if they were
 228                  * actually modified. */
 229                 r = RESUME_HOST_NV;
 230                 break;
 231         case EMULATE_FAIL:
 232                 /* XXX Deliver Program interrupt to guest. */
 233                 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
 234                        kvmppc_get_last_inst(vcpu));
 235                 r = RESUME_HOST;
 236                 break;
 237         default:
 238                 WARN_ON(1);
 239                 r = RESUME_GUEST;
 240         }
 241
 242         return r;
 243 }
 244 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
 245
 246 int kvm_arch_hardware_enable(void *garbage)
 247 {
 248         return 0;
 249 }
 250
 251 void kvm_arch_hardware_disable(void *garbage)
 252 {
 253 }
 254
 255 int kvm_arch_hardware_setup(void)
 256 {
 257         return 0;
 258 }
 259
 260 void kvm_arch_hardware_unsetup(void)
 261 {
 262 }
 263
 264 void kvm_arch_check_processor_compat(void *rtn)
 265 {
 266         *(int *)rtn = kvmppc_core_check_processor_compat();
 267 }
 268
 269 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 270 {
 271         struct kvmppc_ops *kvm_ops = NULL;
 272         /*
 273          * if we have both HV and PR enabled, default is HV
 274          */
 275         if (type == 0) {
 276                 if (kvmppc_hv_ops)
 277                         kvm_ops = kvmppc_hv_ops;
 278                 else
 279                         kvm_ops = kvmppc_pr_ops;
 280                 if (!kvm_ops)
 281                         goto err_out;
 282         } else  if (type == KVM_VM_PPC_HV) {
 283                 if (!kvmppc_hv_ops)
 284                         goto err_out;
 285                 kvm_ops = kvmppc_hv_ops;
 286         } else if (type == KVM_VM_PPC_PR) {
 287                 if (!kvmppc_pr_ops)
 288                         goto err_out;
 289                 kvm_ops = kvmppc_pr_ops;
 290         } else
 291                 goto err_out;
 292
 293         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
 294                 return -ENOENT;
 295
 296         kvm->arch.kvm_ops = kvm_ops;
 297         return kvmppc_core_init_vm(kvm);
 298 err_out:
 299         return -EINVAL;
 300 }
 301
 302 void kvm_arch_destroy_vm(struct kvm *kvm)
 303 {
 304         unsigned int i;
 305         struct kvm_vcpu *vcpu;
 306
 307         kvm_for_each_vcpu(i, vcpu, kvm)
 308                 kvm_arch_vcpu_free(vcpu);
 309
 310         mutex_lock(&kvm->lock);
 311         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 312                 kvm->vcpus[i] = NULL;
 313
 314         atomic_set(&kvm->online_vcpus, 0);
 315
 316         kvmppc_core_destroy_vm(kvm);
 317
 318         mutex_unlock(&kvm->lock);
 319
 320         /* drop the module reference */
 321         module_put(kvm->arch.kvm_ops->owner);
 322 }
 323
 324 void kvm_arch_sync_events(struct kvm *kvm)
 325 {
 326 }
 327
 328 int kvm_dev_ioctl_check_extension(long ext)
 329 {
 330         int r;
 331         /* FIXME!!
 332          * Should some of this be vm ioctl ? is it possible now ?
 333          */
 334         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 335
 336         switch (ext) {
 337 #ifdef CONFIG_BOOKE
 338         case KVM_CAP_PPC_BOOKE_SREGS:
 339         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 340         case KVM_CAP_PPC_EPR:
 341 #else
 342         case KVM_CAP_PPC_SEGSTATE:
 343         case KVM_CAP_PPC_HIOR:
 344         case KVM_CAP_PPC_PAPR:
 345 #endif
 346         case KVM_CAP_PPC_UNSET_IRQ:
 347         case KVM_CAP_PPC_IRQ_LEVEL:
 348         case KVM_CAP_ENABLE_CAP:
 349         case KVM_CAP_ONE_REG:
 350         case KVM_CAP_IOEVENTFD:
 351         case KVM_CAP_DEVICE_CTRL:
 352                 r = 1;
 353                 break;
 354         case KVM_CAP_PPC_PAIRED_SINGLES:
 355         case KVM_CAP_PPC_OSI:
 356         case KVM_CAP_PPC_GET_PVINFO:
 357 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 358         case KVM_CAP_SW_TLB:
 359 #endif
 360                 /* We support this only for PR */
 361                 r = !hv_enabled;
 362                 break;
 363 #ifdef CONFIG_KVM_MMIO
 364         case KVM_CAP_COALESCED_MMIO:
 365                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 366                 break;
 367 #endif
 368 #ifdef CONFIG_KVM_MPIC
 369         case KVM_CAP_IRQ_MPIC:
 370                 r = 1;
 371                 break;
 372 #endif
 373
 374 #ifdef CONFIG_PPC_BOOK3S_64
 375         case KVM_CAP_SPAPR_TCE:
 376         case KVM_CAP_PPC_ALLOC_HTAB:
 377         case KVM_CAP_PPC_RTAS:
 378 #ifdef CONFIG_KVM_XICS
 379         case KVM_CAP_IRQ_XICS:
 380 #endif
 381                 r = 1;
 382                 break;
 383 #endif /* CONFIG_PPC_BOOK3S_64 */
 384 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 385         case KVM_CAP_PPC_SMT:
 386                 if (hv_enabled)
 387                         r = threads_per_core;
 388                 else
 389                         r = 0;
 390                 break;
 391         case KVM_CAP_PPC_RMA:
 392                 r = hv_enabled;
 393                 /* PPC970 requires an RMA */
 394                 if (r && cpu_has_feature(CPU_FTR_ARCH_201))
 395                         r = 2;
 396                 break;
 397 #endif
 398         case KVM_CAP_SYNC_MMU:
 399 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 400                 if (hv_enabled)
 401                         r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
 402                 else
 403                         r = 0;
 404 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 405                 r = 1;
 406 #else
 407                 r = 0;
 408 #endif
 409                 break;
 410 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 411         case KVM_CAP_PPC_HTAB_FD:
 412                 r = hv_enabled;
 413                 break;
 414 #endif
 415         case KVM_CAP_NR_VCPUS:
 416                 /*
 417                  * Recommending a number of CPUs is somewhat arbitrary; we
 418                  * return the number of present CPUs for -HV (since a host
 419                  * will have secondary threads "offline"), and for other KVM
 420                  * implementations just count online CPUs.
 421                  */
 422                 if (hv_enabled)
 423                         r = num_present_cpus();
 424                 else
 425                         r = num_online_cpus();
 426                 break;
 427         case KVM_CAP_MAX_VCPUS:
 428                 r = KVM_MAX_VCPUS;
 429                 break;
 430 #ifdef CONFIG_PPC_BOOK3S_64
 431         case KVM_CAP_PPC_GET_SMMU_INFO:
 432                 r = 1;
 433                 break;
 434 #endif
 435         default:
 436                 r = 0;
 437                 break;
 438         }
 439         return r;
 440
 441 }
 442
 443 long kvm_arch_dev_ioctl(struct file *filp,
 444                         unsigned int ioctl, unsigned long arg)
 445 {
 446         return -EINVAL;
 447 }
 448
 449 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 450                            struct kvm_memory_slot *dont)
 451 {
 452         kvmppc_core_free_memslot(kvm, free, dont);
 453 }
 454
 455 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 456                             unsigned long npages)
 457 {
 458         return kvmppc_core_create_memslot(kvm, slot, npages);
 459 }
 460
 461 void kvm_arch_memslots_updated(struct kvm *kvm)
 462 {
 463 }
 464
 465 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 466                                    struct kvm_memory_slot *memslot,
 467                                    struct kvm_userspace_memory_region *mem,
 468                                    enum kvm_mr_change change)
 469 {
 470         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 471 }
 472
 473 void kvm_arch_commit_memory_region(struct kvm *kvm,
 474                                    struct kvm_userspace_memory_region *mem,
 475                                    const struct kvm_memory_slot *old,
 476                                    enum kvm_mr_change change)
 477 {
 478         kvmppc_core_commit_memory_region(kvm, mem, old);
 479 }
 480
 481 void kvm_arch_flush_shadow_all(struct kvm *kvm)
 482 {
 483 }
 484
 485 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 486                                    struct kvm_memory_slot *slot)
 487 {
 488         kvmppc_core_flush_memslot(kvm, slot);
 489 }
 490
 491 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 492 {
 493         struct kvm_vcpu *vcpu;
 494         vcpu = kvmppc_core_vcpu_create(kvm, id);
 495         if (!IS_ERR(vcpu)) {
 496                 vcpu->arch.wqp = &vcpu->wq;
 497                 kvmppc_create_vcpu_debugfs(vcpu, id);
 498         }
 499         return vcpu;
 500 }
 501
 502 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 503 {
 504         return 0;
 505 }
 506
 507 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 508 {
 509         /* Make sure we're not using the vcpu anymore */
 510         hrtimer_cancel(&vcpu->arch.dec_timer);
 511         tasklet_kill(&vcpu->arch.tasklet);
 512
 513         kvmppc_remove_vcpu_debugfs(vcpu);
 514
 515         switch (vcpu->arch.irq_type) {
 516         case KVMPPC_IRQ_MPIC:
 517                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 518                 break;
 519         case KVMPPC_IRQ_XICS:
 520                 kvmppc_xics_free_icp(vcpu);
 521                 break;
 522         }
 523
 524         kvmppc_core_vcpu_free(vcpu);
 525 }
 526
 527 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 528 {
 529         kvm_arch_vcpu_free(vcpu);
 530 }
 531
 532 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 533 {
 534         return kvmppc_core_pending_dec(vcpu);
 535 }
 536
 537 /*
 538  * low level hrtimer wake routine. Because this runs in hardirq context
 539  * we schedule a tasklet to do the real work.
 540  */
 541 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 542 {
 543         struct kvm_vcpu *vcpu;
 544
 545         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 546         tasklet_schedule(&vcpu->arch.tasklet);
 547
 548         return HRTIMER_NORESTART;
 549 }
 550
 551 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 552 {
 553         int ret;
 554
 555         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 556         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 557         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 558         vcpu->arch.dec_expires = ~(u64)0;
 559
 560 #ifdef CONFIG_KVM_EXIT_TIMING
 561         mutex_init(&vcpu->arch.exit_timing_lock);
 562 #endif
 563         ret = kvmppc_subarch_vcpu_init(vcpu);
 564         return ret;
 565 }
 566
 567 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 568 {
 569         kvmppc_mmu_destroy(vcpu);
 570         kvmppc_subarch_vcpu_uninit(vcpu);
 571 }
 572
 573 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 574 {
 575 #ifdef CONFIG_BOOKE
 576         /*
 577          * vrsave (formerly usprg0) isn't used by Linux, but may
 578          * be used by the guest.
 579          *
 580          * On non-booke this is associated with Altivec and
 581          * is handled by code in book3s.c.
 582          */
 583         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 584 #endif
 585         kvmppc_core_vcpu_load(vcpu, cpu);
 586 }
 587
 588 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 589 {
 590         kvmppc_core_vcpu_put(vcpu);
 591 #ifdef CONFIG_BOOKE
 592         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 593 #endif
 594 }
 595
 596 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 597                                      struct kvm_run *run)
 598 {
 599         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 600 }
 601
 602 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 603                                       struct kvm_run *run)
 604 {
 605         u64 uninitialized_var(gpr);
 606
 607         if (run->mmio.len > sizeof(gpr)) {
 608                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 609                 return;
 610         }
 611
 612         if (vcpu->arch.mmio_is_bigendian) {
 613                 switch (run->mmio.len) {
 614                 case 8: gpr = *(u64 *)run->mmio.data; break;
 615                 case 4: gpr = *(u32 *)run->mmio.data; break;
 616                 case 2: gpr = *(u16 *)run->mmio.data; break;
 617                 case 1: gpr = *(u8 *)run->mmio.data; break;
 618                 }
 619         } else {
 620                 /* Convert BE data from userland back to LE. */
 621                 switch (run->mmio.len) {
 622                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 623                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 624                 case 1: gpr = *(u8 *)run->mmio.data; break;
 625                 }
 626         }
 627
 628         if (vcpu->arch.mmio_sign_extend) {
 629                 switch (run->mmio.len) {
 630 #ifdef CONFIG_PPC64
 631                 case 4:
 632                         gpr = (s64)(s32)gpr;
 633                         break;
 634 #endif
 635                 case 2:
 636                         gpr = (s64)(s16)gpr;
 637                         break;
 638                 case 1:
 639                         gpr = (s64)(s8)gpr;
 640                         break;
 641                 }
 642         }
 643
 644         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 645
 646         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
 647         case KVM_MMIO_REG_GPR:
 648                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 649                 break;
 650         case KVM_MMIO_REG_FPR:
 651                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 652                 break;
 653 #ifdef CONFIG_PPC_BOOK3S
 654         case KVM_MMIO_REG_QPR:
 655                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 656                 break;
 657         case KVM_MMIO_REG_FQPR:
 658                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
 659                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
 660                 break;
 661 #endif
 662         default:
 663                 BUG();
 664         }
 665 }
 666
 667 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 668                        unsigned int rt, unsigned int bytes,
 669                        int is_default_endian)
 670 {
 671         int idx, ret;
 672         int is_bigendian;
 673
 674         if (kvmppc_need_byteswap(vcpu)) {
 675                 /* Default endianness is "little endian". */
 676                 is_bigendian = !is_default_endian;
 677         } else {
 678                 /* Default endianness is "big endian". */
 679                 is_bigendian = is_default_endian;
 680         }
 681
 682         if (bytes > sizeof(run->mmio.data)) {
 683                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 684                        run->mmio.len);
 685         }
 686
 687         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 688         run->mmio.len = bytes;
 689         run->mmio.is_write = 0;
 690
 691         vcpu->arch.io_gpr = rt;
 692         vcpu->arch.mmio_is_bigendian = is_bigendian;
 693         vcpu->mmio_needed = 1;
 694         vcpu->mmio_is_write = 0;
 695         vcpu->arch.mmio_sign_extend = 0;
 696
 697         idx = srcu_read_lock(&vcpu->kvm->srcu);
 698
 699         ret = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
 700                               bytes, &run->mmio.data);
 701
 702         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 703
 704         if (!ret) {
 705                 kvmppc_complete_mmio_load(vcpu, run);
 706                 vcpu->mmio_needed = 0;
 707                 return EMULATE_DONE;
 708         }
 709
 710         return EMULATE_DO_MMIO;
 711 }
 712 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
 713
 714 /* Same as above, but sign extends */
 715 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 716                         unsigned int rt, unsigned int bytes,
 717                         int is_default_endian)
 718 {
 719         int r;
 720
 721         vcpu->arch.mmio_sign_extend = 1;
 722         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
 723
 724         return r;
 725 }
 726
 727 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 728                         u64 val, unsigned int bytes, int is_default_endian)
 729 {
 730         void *data = run->mmio.data;
 731         int idx, ret;
 732         int is_bigendian;
 733
 734         if (kvmppc_need_byteswap(vcpu)) {
 735                 /* Default endianness is "little endian". */
 736                 is_bigendian = !is_default_endian;
 737         } else {
 738                 /* Default endianness is "big endian". */
 739                 is_bigendian = is_default_endian;
 740         }
 741
 742         if (bytes > sizeof(run->mmio.data)) {
 743                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 744                        run->mmio.len);
 745         }
 746
 747         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 748         run->mmio.len = bytes;
 749         run->mmio.is_write = 1;
 750         vcpu->mmio_needed = 1;
 751         vcpu->mmio_is_write = 1;
 752
 753         /* Store the value at the lowest bytes in 'data'. */
 754         if (is_bigendian) {
 755                 switch (bytes) {
 756                 case 8: *(u64 *)data = val; break;
 757                 case 4: *(u32 *)data = val; break;
 758                 case 2: *(u16 *)data = val; break;
 759                 case 1: *(u8  *)data = val; break;
 760                 }
 761         } else {
 762                 /* Store LE value into 'data'. */
 763                 switch (bytes) {
 764                 case 4: st_le32(data, val); break;
 765                 case 2: st_le16(data, val); break;
 766                 case 1: *(u8 *)data = val; break;
 767                 }
 768         }
 769
 770         idx = srcu_read_lock(&vcpu->kvm->srcu);
 771
 772         ret = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
 773                                bytes, &run->mmio.data);
 774
 775         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 776
 777         if (!ret) {
 778                 vcpu->mmio_needed = 0;
 779                 return EMULATE_DONE;
 780         }
 781
 782         return EMULATE_DO_MMIO;
 783 }
 784 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
 785
 786 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 787 {
 788         int r;
 789         sigset_t sigsaved;
 790
 791         if (vcpu->sigset_active)
 792                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 793
 794         if (vcpu->mmio_needed) {
 795                 if (!vcpu->mmio_is_write)
 796                         kvmppc_complete_mmio_load(vcpu, run);
 797                 vcpu->mmio_needed = 0;
 798         } else if (vcpu->arch.dcr_needed) {
 799                 if (!vcpu->arch.dcr_is_write)
 800                         kvmppc_complete_dcr_load(vcpu, run);
 801                 vcpu->arch.dcr_needed = 0;
 802         } else if (vcpu->arch.osi_needed) {
 803                 u64 *gprs = run->osi.gprs;
 804                 int i;
 805
 806                 for (i = 0; i < 32; i++)
 807                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 808                 vcpu->arch.osi_needed = 0;
 809         } else if (vcpu->arch.hcall_needed) {
 810                 int i;
 811
 812                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 813                 for (i = 0; i < 9; ++i)
 814                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 815                 vcpu->arch.hcall_needed = 0;
 816 #ifdef CONFIG_BOOKE
 817         } else if (vcpu->arch.epr_needed) {
 818                 kvmppc_set_epr(vcpu, run->epr.epr);
 819                 vcpu->arch.epr_needed = 0;
 820 #endif
 821         }
 822
 823         r = kvmppc_vcpu_run(run, vcpu);
 824
 825         if (vcpu->sigset_active)
 826                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 827
 828         return r;
 829 }
 830
 831 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 832 {
 833         if (irq->irq == KVM_INTERRUPT_UNSET) {
 834                 kvmppc_core_dequeue_external(vcpu);
 835                 return 0;
 836         }
 837
 838         kvmppc_core_queue_external(vcpu, irq);
 839
 840         kvm_vcpu_kick(vcpu);
 841
 842         return 0;
 843 }
 844
 845 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 846                                      struct kvm_enable_cap *cap)
 847 {
 848         int r;
 849
 850         if (cap->flags)
 851                 return -EINVAL;
 852
 853         switch (cap->cap) {
 854         case KVM_CAP_PPC_OSI:
 855                 r = 0;
 856                 vcpu->arch.osi_enabled = true;
 857                 break;
 858         case KVM_CAP_PPC_PAPR:
 859                 r = 0;
 860                 vcpu->arch.papr_enabled = true;
 861                 break;
 862         case KVM_CAP_PPC_EPR:
 863                 r = 0;
 864                 if (cap->args[0])
 865                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
 866                 else
 867                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
 868                 break;
 869 #ifdef CONFIG_BOOKE
 870         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 871                 r = 0;
 872                 vcpu->arch.watchdog_enabled = true;
 873                 break;
 874 #endif
 875 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 876         case KVM_CAP_SW_TLB: {
 877                 struct kvm_config_tlb cfg;
 878                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
 879
 880                 r = -EFAULT;
 881                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
 882                         break;
 883
 884                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
 885                 break;
 886         }
 887 #endif
 888 #ifdef CONFIG_KVM_MPIC
 889         case KVM_CAP_IRQ_MPIC: {
 890                 struct fd f;
 891                 struct kvm_device *dev;
 892
 893                 r = -EBADF;
 894                 f = fdget(cap->args[0]);
 895                 if (!f.file)
 896                         break;
 897
 898                 r = -EPERM;
 899                 dev = kvm_device_from_filp(f.file);
 900                 if (dev)
 901                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
 902
 903                 fdput(f);
 904                 break;
 905         }
 906 #endif
 907 #ifdef CONFIG_KVM_XICS
 908         case KVM_CAP_IRQ_XICS: {
 909                 struct fd f;
 910                 struct kvm_device *dev;
 911
 912                 r = -EBADF;
 913                 f = fdget(cap->args[0]);
 914                 if (!f.file)
 915                         break;
 916
 917                 r = -EPERM;
 918                 dev = kvm_device_from_filp(f.file);
 919                 if (dev)
 920                         r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
 921
 922                 fdput(f);
 923                 break;
 924         }
 925 #endif /* CONFIG_KVM_XICS */
 926         default:
 927                 r = -EINVAL;
 928                 break;
 929         }
 930
 931         if (!r)
 932                 r = kvmppc_sanity_check(vcpu);
 933
 934         return r;
 935 }
 936
 937 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 938                                     struct kvm_mp_state *mp_state)
 939 {
 940         return -EINVAL;
 941 }
 942
 943 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 944                                     struct kvm_mp_state *mp_state)
 945 {
 946         return -EINVAL;
 947 }
 948
 949 long kvm_arch_vcpu_ioctl(struct file *filp,
 950                          unsigned int ioctl, unsigned long arg)
 951 {
 952         struct kvm_vcpu *vcpu = filp->private_data;
 953         void __user *argp = (void __user *)arg;
 954         long r;
 955
 956         switch (ioctl) {
 957         case KVM_INTERRUPT: {
 958                 struct kvm_interrupt irq;
 959                 r = -EFAULT;
 960                 if (copy_from_user(&irq, argp, sizeof(irq)))
 961                         goto out;
 962                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
 963                 goto out;
 964         }
 965
 966         case KVM_ENABLE_CAP:
 967         {
 968                 struct kvm_enable_cap cap;
 969                 r = -EFAULT;
 970                 if (copy_from_user(&cap, argp, sizeof(cap)))
 971                         goto out;
 972                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
 973                 break;
 974         }
 975
 976         case KVM_SET_ONE_REG:
 977         case KVM_GET_ONE_REG:
 978         {
 979                 struct kvm_one_reg reg;
 980                 r = -EFAULT;
 981                 if (copy_from_user(&reg, argp, sizeof(reg)))
 982                         goto out;
 983                 if (ioctl == KVM_SET_ONE_REG)
 984                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
 985                 else
 986                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
 987                 break;
 988         }
 989
 990 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 991         case KVM_DIRTY_TLB: {
 992                 struct kvm_dirty_tlb dirty;
 993                 r = -EFAULT;
 994                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
 995                         goto out;
 996                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
 997                 break;
 998         }
 999 #endif
1000         default:
1001                 r = -EINVAL;
1002         }
1003
1004 out:
1005         return r;
1006 }
1007
1008 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1009 {
1010         return VM_FAULT_SIGBUS;
1011 }
1012
1013 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1014 {
1015         u32 inst_nop = 0x60000000;
1016 #ifdef CONFIG_KVM_BOOKE_HV
1017         u32 inst_sc1 = 0x44000022;
1018         pvinfo->hcall[0] = inst_sc1;
1019         pvinfo->hcall[1] = inst_nop;
1020         pvinfo->hcall[2] = inst_nop;
1021         pvinfo->hcall[3] = inst_nop;
1022 #else
1023         u32 inst_lis = 0x3c000000;
1024         u32 inst_ori = 0x60000000;
1025         u32 inst_sc = 0x44000002;
1026         u32 inst_imm_mask = 0xffff;
1027
1028         /*
1029          * The hypercall to get into KVM from within guest context is as
1030          * follows:
1031          *
1032          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1033          *    ori r0, KVM_SC_MAGIC_R0@l
1034          *    sc
1035          *    nop
1036          */
1037         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
1038         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
1039         pvinfo->hcall[2] = inst_sc;
1040         pvinfo->hcall[3] = inst_nop;
1041 #endif
1042
1043         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1044
1045         return 0;
1046 }
1047
1048 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1049                           bool line_status)
1050 {
1051         if (!irqchip_in_kernel(kvm))
1052                 return -ENXIO;
1053
1054         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1055                                         irq_event->irq, irq_event->level,
1056                                         line_status);
1057         return 0;
1058 }
1059
1060 long kvm_arch_vm_ioctl(struct file *filp,
1061                        unsigned int ioctl, unsigned long arg)
1062 {
1063         struct kvm *kvm __maybe_unused = filp->private_data;
1064         void __user *argp = (void __user *)arg;
1065         long r;
1066
1067         switch (ioctl) {
1068         case KVM_PPC_GET_PVINFO: {
1069                 struct kvm_ppc_pvinfo pvinfo;
1070                 memset(&pvinfo, 0, sizeof(pvinfo));
1071                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
1072                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
1073                         r = -EFAULT;
1074                         goto out;
1075                 }
1076
1077                 break;
1078         }
1079 #ifdef CONFIG_PPC_BOOK3S_64
1080         case KVM_CREATE_SPAPR_TCE: {
1081                 struct kvm_create_spapr_tce create_tce;
1082
1083                 r = -EFAULT;
1084                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
1085                         goto out;
1086                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
1087                 goto out;
1088         }
1089         case KVM_PPC_GET_SMMU_INFO: {
1090                 struct kvm_ppc_smmu_info info;
1091                 struct kvm *kvm = filp->private_data;
1092
1093                 memset(&info, 0, sizeof(info));
1094                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1095                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
1096                         r = -EFAULT;
1097                 break;
1098         }
1099         case KVM_PPC_RTAS_DEFINE_TOKEN: {
1100                 struct kvm *kvm = filp->private_data;
1101
1102                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
1103                 break;
1104         }
1105         default: {
1106                 struct kvm *kvm = filp->private_data;
1107                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
1108         }
1109 #else /* CONFIG_PPC_BOOK3S_64 */
1110         default:
1111                 r = -ENOTTY;
1112 #endif
1113         }
1114 out:
1115         return r;
1116 }
1117
1118 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
1119 static unsigned long nr_lpids;
1120
1121 long kvmppc_alloc_lpid(void)
1122 {
1123         long lpid;
1124
1125         do {
1126                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
1127                 if (lpid >= nr_lpids) {
1128                         pr_err("%s: No LPIDs free\n", __func__);
1129                         return -ENOMEM;
1130                 }
1131         } while (test_and_set_bit(lpid, lpid_inuse));
1132
1133         return lpid;
1134 }
1135 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1136
1137 void kvmppc_claim_lpid(long lpid)
1138 {
1139         set_bit(lpid, lpid_inuse);
1140 }
1141 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1142
1143 void kvmppc_free_lpid(long lpid)
1144 {
1145         clear_bit(lpid, lpid_inuse);
1146 }
1147 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1148
1149 void kvmppc_init_lpid(unsigned long nr_lpids_param)
1150 {
1151         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
1152         memset(lpid_inuse, 0, sizeof(lpid_inuse));
1153 }
1154 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1155
1156 int kvm_arch_init(void *opaque)
1157 {
1158         return 0;
1159 }
1160
1161 void kvm_arch_exit(void)
1162 {
1163
1164 }