arch/powerpc/kvm/book3s.c

   1 /*
   2  * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
   3  *
   4  * Authors:
   5  *    Alexander Graf <agraf@suse.de>
   6  *    Kevin Wolf <mail@kevin-wolf.de>
   7  *
   8  * Description:
   9  * This file is derived from arch/powerpc/kvm/44x.c,
  10  * by Hollis Blanchard <hollisb@us.ibm.com>.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License, version 2, as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 #include <linux/kvm_host.h>
  18 #include <linux/err.h>
  19 #include <linux/export.h>
  20 #include <linux/slab.h>
  21 #include <linux/module.h>
  22 #include <linux/miscdevice.h>
  23
  24 #include <asm/reg.h>
  25 #include <asm/cputable.h>
  26 #include <asm/cacheflush.h>
  27 #include <asm/tlbflush.h>
  28 #include <asm/uaccess.h>
  29 #include <asm/io.h>
  30 #include <asm/kvm_ppc.h>
  31 #include <asm/kvm_book3s.h>
  32 #include <asm/mmu_context.h>
  33 #include <asm/page.h>
  34 #include <linux/gfp.h>
  35 #include <linux/sched.h>
  36 #include <linux/vmalloc.h>
  37 #include <linux/highmem.h>
  38
  39 #include "book3s.h"
  40 #include "trace.h"
  41
  42 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  43
  44 /* #define EXIT_DEBUG */
  45
  46 struct kvm_stats_debugfs_item debugfs_entries[] = {
  47         { "exits",       VCPU_STAT(sum_exits) },
  48         { "mmio",        VCPU_STAT(mmio_exits) },
  49         { "sig",         VCPU_STAT(signal_exits) },
  50         { "sysc",        VCPU_STAT(syscall_exits) },
  51         { "inst_emu",    VCPU_STAT(emulated_inst_exits) },
  52         { "dec",         VCPU_STAT(dec_exits) },
  53         { "ext_intr",    VCPU_STAT(ext_intr_exits) },
  54         { "queue_intr",  VCPU_STAT(queue_intr) },
  55         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  56         { "pf_storage",  VCPU_STAT(pf_storage) },
  57         { "sp_storage",  VCPU_STAT(sp_storage) },
  58         { "pf_instruc",  VCPU_STAT(pf_instruc) },
  59         { "sp_instruc",  VCPU_STAT(sp_instruc) },
  60         { "ld",          VCPU_STAT(ld) },
  61         { "ld_slow",     VCPU_STAT(ld_slow) },
  62         { "st",          VCPU_STAT(st) },
  63         { "st_slow",     VCPU_STAT(st_slow) },
  64         { NULL }
  65 };
  66
  67 void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
  68 {
  69 }
  70
  71 void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
  72 {
  73 }
  74
  75 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
  76 {
  77         if (!is_kvmppc_hv_enabled(vcpu->kvm))
  78                 return to_book3s(vcpu)->hior;
  79         return 0;
  80 }
  81
  82 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
  83                         unsigned long pending_now, unsigned long old_pending)
  84 {
  85         if (is_kvmppc_hv_enabled(vcpu->kvm))
  86                 return;
  87         if (pending_now)
  88                 vcpu->arch.shared->int_pending = 1;
  89         else if (old_pending)
  90                 vcpu->arch.shared->int_pending = 0;
  91 }
  92
  93 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
  94 {
  95         ulong crit_raw;
  96         ulong crit_r1;
  97         bool crit;
  98
  99         if (is_kvmppc_hv_enabled(vcpu->kvm))
 100                 return false;
 101
 102         crit_raw = vcpu->arch.shared->critical;
 103         crit_r1 = kvmppc_get_gpr(vcpu, 1);
 104
 105         /* Truncate crit indicators in 32 bit mode */
 106         if (!(vcpu->arch.shared->msr & MSR_SF)) {
 107                 crit_raw &= 0xffffffff;
 108                 crit_r1 &= 0xffffffff;
 109         }
 110
 111         /* Critical section when crit == r1 */
 112         crit = (crit_raw == crit_r1);
 113         /* ... and we're in supervisor mode */
 114         crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
 115
 116         return crit;
 117 }
 118
 119 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
 120 {
 121         vcpu->arch.shared->srr0 = kvmppc_get_pc(vcpu);
 122         vcpu->arch.shared->srr1 = vcpu->arch.shared->msr | flags;
 123         kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
 124         vcpu->arch.mmu.reset_msr(vcpu);
 125 }
 126
 127 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
 128 {
 129         unsigned int prio;
 130
 131         switch (vec) {
 132         case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;         break;
 133         case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;        break;
 134         case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;         break;
 135         case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;         break;
 136         case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;         break;
 137         case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;         break;
 138         case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;             break;
 139         case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL;       break;
 140         case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;            break;
 141         case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;              break;
 142         case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;           break;
 143         case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;          break;
 144         case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;              break;
 145         case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;                break;
 146         case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;              break;
 147         case 0xf40: prio = BOOK3S_IRQPRIO_VSX;                  break;
 148         default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
 149         }
 150
 151         return prio;
 152 }
 153
 154 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 155                                           unsigned int vec)
 156 {
 157         unsigned long old_pending = vcpu->arch.pending_exceptions;
 158
 159         clear_bit(kvmppc_book3s_vec2irqprio(vec),
 160                   &vcpu->arch.pending_exceptions);
 161
 162         kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
 163                                   old_pending);
 164 }
 165
 166 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
 167 {
 168         vcpu->stat.queue_intr++;
 169
 170         set_bit(kvmppc_book3s_vec2irqprio(vec),
 171                 &vcpu->arch.pending_exceptions);
 172 #ifdef EXIT_DEBUG
 173         printk(KERN_INFO "Queueing interrupt %x\n", vec);
 174 #endif
 175 }
 176 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
 177
 178 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
 179 {
 180         /* might as well deliver this straight away */
 181         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
 182 }
 183 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
 184
 185 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 186 {
 187         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 188 }
 189 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
 190
 191 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 192 {
 193         return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 194 }
 195 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
 196
 197 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 198 {
 199         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 200 }
 201 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
 202
 203 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 204                                 struct kvm_interrupt *irq)
 205 {
 206         unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
 207
 208         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 209                 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
 210
 211         kvmppc_book3s_queue_irqprio(vcpu, vec);
 212 }
 213
 214 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 215 {
 216         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 217         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
 218 }
 219
 220 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
 221 {
 222         int deliver = 1;
 223         int vec = 0;
 224         bool crit = kvmppc_critical_section(vcpu);
 225
 226         switch (priority) {
 227         case BOOK3S_IRQPRIO_DECREMENTER:
 228                 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
 229                 vec = BOOK3S_INTERRUPT_DECREMENTER;
 230                 break;
 231         case BOOK3S_IRQPRIO_EXTERNAL:
 232         case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 233                 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
 234                 vec = BOOK3S_INTERRUPT_EXTERNAL;
 235                 break;
 236         case BOOK3S_IRQPRIO_SYSTEM_RESET:
 237                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
 238                 break;
 239         case BOOK3S_IRQPRIO_MACHINE_CHECK:
 240                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
 241                 break;
 242         case BOOK3S_IRQPRIO_DATA_STORAGE:
 243                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
 244                 break;
 245         case BOOK3S_IRQPRIO_INST_STORAGE:
 246                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
 247                 break;
 248         case BOOK3S_IRQPRIO_DATA_SEGMENT:
 249                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
 250                 break;
 251         case BOOK3S_IRQPRIO_INST_SEGMENT:
 252                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
 253                 break;
 254         case BOOK3S_IRQPRIO_ALIGNMENT:
 255                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
 256                 break;
 257         case BOOK3S_IRQPRIO_PROGRAM:
 258                 vec = BOOK3S_INTERRUPT_PROGRAM;
 259                 break;
 260         case BOOK3S_IRQPRIO_VSX:
 261                 vec = BOOK3S_INTERRUPT_VSX;
 262                 break;
 263         case BOOK3S_IRQPRIO_ALTIVEC:
 264                 vec = BOOK3S_INTERRUPT_ALTIVEC;
 265                 break;
 266         case BOOK3S_IRQPRIO_FP_UNAVAIL:
 267                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
 268                 break;
 269         case BOOK3S_IRQPRIO_SYSCALL:
 270                 vec = BOOK3S_INTERRUPT_SYSCALL;
 271                 break;
 272         case BOOK3S_IRQPRIO_DEBUG:
 273                 vec = BOOK3S_INTERRUPT_TRACE;
 274                 break;
 275         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
 276                 vec = BOOK3S_INTERRUPT_PERFMON;
 277                 break;
 278         default:
 279                 deliver = 0;
 280                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
 281                 break;
 282         }
 283
 284 #if 0
 285         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
 286 #endif
 287
 288         if (deliver)
 289                 kvmppc_inject_interrupt(vcpu, vec, 0);
 290
 291         return deliver;
 292 }
 293
 294 /*
 295  * This function determines if an irqprio should be cleared once issued.
 296  */
 297 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
 298 {
 299         switch (priority) {
 300                 case BOOK3S_IRQPRIO_DECREMENTER:
 301                         /* DEC interrupts get cleared by mtdec */
 302                         return false;
 303                 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 304                         /* External interrupts get cleared by userspace */
 305                         return false;
 306         }
 307
 308         return true;
 309 }
 310
 311 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 312 {
 313         unsigned long *pending = &vcpu->arch.pending_exceptions;
 314         unsigned long old_pending = vcpu->arch.pending_exceptions;
 315         unsigned int priority;
 316
 317 #ifdef EXIT_DEBUG
 318         if (vcpu->arch.pending_exceptions)
 319                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
 320 #endif
 321         priority = __ffs(*pending);
 322         while (priority < BOOK3S_IRQPRIO_MAX) {
 323                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
 324                     clear_irqprio(vcpu, priority)) {
 325                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 326                         break;
 327                 }
 328
 329                 priority = find_next_bit(pending,
 330                                          BITS_PER_BYTE * sizeof(*pending),
 331                                          priority + 1);
 332         }
 333
 334         /* Tell the guest about our interrupt status */
 335         kvmppc_update_int_pending(vcpu, *pending, old_pending);
 336
 337         return 0;
 338 }
 339 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
 340
 341 pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn, bool writing,
 342                         bool *writable)
 343 {
 344         ulong mp_pa = vcpu->arch.magic_page_pa;
 345
 346         if (!(vcpu->arch.shared->msr & MSR_SF))
 347                 mp_pa = (uint32_t)mp_pa;
 348
 349         /* Magic page override */
 350         if (unlikely(mp_pa) &&
 351             unlikely(((gfn << PAGE_SHIFT) & KVM_PAM) ==
 352                      ((mp_pa & PAGE_MASK) & KVM_PAM))) {
 353                 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
 354                 pfn_t pfn;
 355
 356                 pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
 357                 get_page(pfn_to_page(pfn));
 358                 if (writable)
 359                         *writable = true;
 360                 return pfn;
 361         }
 362
 363         return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
 364 }
 365 EXPORT_SYMBOL_GPL(kvmppc_gfn_to_pfn);
 366
 367 static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
 368                         bool iswrite, struct kvmppc_pte *pte)
 369 {
 370         int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR));
 371         int r;
 372
 373         if (relocated) {
 374                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
 375         } else {
 376                 pte->eaddr = eaddr;
 377                 pte->raddr = eaddr & KVM_PAM;
 378                 pte->vpage = VSID_REAL | eaddr >> 12;
 379                 pte->may_read = true;
 380                 pte->may_write = true;
 381                 pte->may_execute = true;
 382                 r = 0;
 383         }
 384
 385         return r;
 386 }
 387
 388 static hva_t kvmppc_bad_hva(void)
 389 {
 390         return PAGE_OFFSET;
 391 }
 392
 393 static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
 394                                bool read)
 395 {
 396         hva_t hpage;
 397
 398         if (read && !pte->may_read)
 399                 goto err;
 400
 401         if (!read && !pte->may_write)
 402                 goto err;
 403
 404         hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
 405         if (kvm_is_error_hva(hpage))
 406                 goto err;
 407
 408         return hpage | (pte->raddr & ~PAGE_MASK);
 409 err:
 410         return kvmppc_bad_hva();
 411 }
 412
 413 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 414               bool data)
 415 {
 416         struct kvmppc_pte pte;
 417
 418         vcpu->stat.st++;
 419
 420         if (kvmppc_xlate(vcpu, *eaddr, data, true, &pte))
 421                 return -ENOENT;
 422
 423         *eaddr = pte.raddr;
 424
 425         if (!pte.may_write)
 426                 return -EPERM;
 427
 428         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 429                 return EMULATE_DO_MMIO;
 430
 431         return EMULATE_DONE;
 432 }
 433 EXPORT_SYMBOL_GPL(kvmppc_st);
 434
 435 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 436                       bool data)
 437 {
 438         struct kvmppc_pte pte;
 439         hva_t hva = *eaddr;
 440
 441         vcpu->stat.ld++;
 442
 443         if (kvmppc_xlate(vcpu, *eaddr, data, false, &pte))
 444                 goto nopte;
 445
 446         *eaddr = pte.raddr;
 447
 448         hva = kvmppc_pte_to_hva(vcpu, &pte, true);
 449         if (kvm_is_error_hva(hva))
 450                 goto mmio;
 451
 452         if (copy_from_user(ptr, (void __user *)hva, size)) {
 453                 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
 454                 goto mmio;
 455         }
 456
 457         return EMULATE_DONE;
 458
 459 nopte:
 460         return -ENOENT;
 461 mmio:
 462         return EMULATE_DO_MMIO;
 463 }
 464 EXPORT_SYMBOL_GPL(kvmppc_ld);
 465
 466 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 467 {
 468         return 0;
 469 }
 470
 471 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
 472 {
 473         return 0;
 474 }
 475
 476 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
 477 {
 478 }
 479
 480 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 481                                   struct kvm_sregs *sregs)
 482 {
 483         return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
 484 }
 485
 486 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 487                                   struct kvm_sregs *sregs)
 488 {
 489         return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
 490 }
 491
 492 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 493 {
 494         int i;
 495
 496         regs->pc = kvmppc_get_pc(vcpu);
 497         regs->cr = kvmppc_get_cr(vcpu);
 498         regs->ctr = kvmppc_get_ctr(vcpu);
 499         regs->lr = kvmppc_get_lr(vcpu);
 500         regs->xer = kvmppc_get_xer(vcpu);
 501         regs->msr = vcpu->arch.shared->msr;
 502         regs->srr0 = vcpu->arch.shared->srr0;
 503         regs->srr1 = vcpu->arch.shared->srr1;
 504         regs->pid = vcpu->arch.pid;
 505         regs->sprg0 = vcpu->arch.shared->sprg0;
 506         regs->sprg1 = vcpu->arch.shared->sprg1;
 507         regs->sprg2 = vcpu->arch.shared->sprg2;
 508         regs->sprg3 = vcpu->arch.shared->sprg3;
 509         regs->sprg4 = vcpu->arch.shared->sprg4;
 510         regs->sprg5 = vcpu->arch.shared->sprg5;
 511         regs->sprg6 = vcpu->arch.shared->sprg6;
 512         regs->sprg7 = vcpu->arch.shared->sprg7;
 513
 514         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 515                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 516
 517         return 0;
 518 }
 519
 520 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 521 {
 522         int i;
 523
 524         kvmppc_set_pc(vcpu, regs->pc);
 525         kvmppc_set_cr(vcpu, regs->cr);
 526         kvmppc_set_ctr(vcpu, regs->ctr);
 527         kvmppc_set_lr(vcpu, regs->lr);
 528         kvmppc_set_xer(vcpu, regs->xer);
 529         kvmppc_set_msr(vcpu, regs->msr);
 530         vcpu->arch.shared->srr0 = regs->srr0;
 531         vcpu->arch.shared->srr1 = regs->srr1;
 532         vcpu->arch.shared->sprg0 = regs->sprg0;
 533         vcpu->arch.shared->sprg1 = regs->sprg1;
 534         vcpu->arch.shared->sprg2 = regs->sprg2;
 535         vcpu->arch.shared->sprg3 = regs->sprg3;
 536         vcpu->arch.shared->sprg4 = regs->sprg4;
 537         vcpu->arch.shared->sprg5 = regs->sprg5;
 538         vcpu->arch.shared->sprg6 = regs->sprg6;
 539         vcpu->arch.shared->sprg7 = regs->sprg7;
 540
 541         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 542                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 543
 544         return 0;
 545 }
 546
 547 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 548 {
 549         return -ENOTSUPP;
 550 }
 551
 552 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 553 {
 554         return -ENOTSUPP;
 555 }
 556
 557 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 558 {
 559         int r;
 560         union kvmppc_one_reg val;
 561         int size;
 562         long int i;
 563
 564         size = one_reg_size(reg->id);
 565         if (size > sizeof(val))
 566                 return -EINVAL;
 567
 568         r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, reg->id, &val);
 569         if (r == -EINVAL) {
 570                 r = 0;
 571                 switch (reg->id) {
 572                 case KVM_REG_PPC_DAR:
 573                         val = get_reg_val(reg->id, vcpu->arch.shared->dar);
 574                         break;
 575                 case KVM_REG_PPC_DSISR:
 576                         val = get_reg_val(reg->id, vcpu->arch.shared->dsisr);
 577                         break;
 578                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 579                         i = reg->id - KVM_REG_PPC_FPR0;
 580                         val = get_reg_val(reg->id, VCPU_FPR(vcpu, i));
 581                         break;
 582                 case KVM_REG_PPC_FPSCR:
 583                         val = get_reg_val(reg->id, vcpu->arch.fp.fpscr);
 584                         break;
 585 #ifdef CONFIG_ALTIVEC
 586                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
 587                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 588                                 r = -ENXIO;
 589                                 break;
 590                         }
 591                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
 592                         break;
 593                 case KVM_REG_PPC_VSCR:
 594                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 595                                 r = -ENXIO;
 596                                 break;
 597                         }
 598                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
 599                         break;
 600                 case KVM_REG_PPC_VRSAVE:
 601                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
 602                         break;
 603 #endif /* CONFIG_ALTIVEC */
 604 #ifdef CONFIG_VSX
 605                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 606                         if (cpu_has_feature(CPU_FTR_VSX)) {
 607                                 long int i = reg->id - KVM_REG_PPC_VSR0;
 608                                 val.vsxval[0] = vcpu->arch.fp.fpr[i][0];
 609                                 val.vsxval[1] = vcpu->arch.fp.fpr[i][1];
 610                         } else {
 611                                 r = -ENXIO;
 612                         }
 613                         break;
 614 #endif /* CONFIG_VSX */
 615                 case KVM_REG_PPC_DEBUG_INST: {
 616                         u32 opcode = INS_TW;
 617                         r = copy_to_user((u32 __user *)(long)reg->addr,
 618                                          &opcode, sizeof(u32));
 619                         break;
 620                 }
 621 #ifdef CONFIG_KVM_XICS
 622                 case KVM_REG_PPC_ICP_STATE:
 623                         if (!vcpu->arch.icp) {
 624                                 r = -ENXIO;
 625                                 break;
 626                         }
 627                         val = get_reg_val(reg->id, kvmppc_xics_get_icp(vcpu));
 628                         break;
 629 #endif /* CONFIG_KVM_XICS */
 630                 default:
 631                         r = -EINVAL;
 632                         break;
 633                 }
 634         }
 635         if (r)
 636                 return r;
 637
 638         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
 639                 r = -EFAULT;
 640
 641         return r;
 642 }
 643
 644 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 645 {
 646         int r;
 647         union kvmppc_one_reg val;
 648         int size;
 649         long int i;
 650
 651         size = one_reg_size(reg->id);
 652         if (size > sizeof(val))
 653                 return -EINVAL;
 654
 655         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
 656                 return -EFAULT;
 657
 658         r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, reg->id, &val);
 659         if (r == -EINVAL) {
 660                 r = 0;
 661                 switch (reg->id) {
 662                 case KVM_REG_PPC_DAR:
 663                         vcpu->arch.shared->dar = set_reg_val(reg->id, val);
 664                         break;
 665                 case KVM_REG_PPC_DSISR:
 666                         vcpu->arch.shared->dsisr = set_reg_val(reg->id, val);
 667                         break;
 668                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 669                         i = reg->id - KVM_REG_PPC_FPR0;
 670                         VCPU_FPR(vcpu, i) = set_reg_val(reg->id, val);
 671                         break;
 672                 case KVM_REG_PPC_FPSCR:
 673                         vcpu->arch.fp.fpscr = set_reg_val(reg->id, val);
 674                         break;
 675 #ifdef CONFIG_ALTIVEC
 676                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
 677                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 678                                 r = -ENXIO;
 679                                 break;
 680                         }
 681                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
 682                         break;
 683                 case KVM_REG_PPC_VSCR:
 684                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 685                                 r = -ENXIO;
 686                                 break;
 687                         }
 688                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
 689                         break;
 690                 case KVM_REG_PPC_VRSAVE:
 691                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 692                                 r = -ENXIO;
 693                                 break;
 694                         }
 695                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
 696                         break;
 697 #endif /* CONFIG_ALTIVEC */
 698 #ifdef CONFIG_VSX
 699                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 700                         if (cpu_has_feature(CPU_FTR_VSX)) {
 701                                 long int i = reg->id - KVM_REG_PPC_VSR0;
 702                                 vcpu->arch.fp.fpr[i][0] = val.vsxval[0];
 703                                 vcpu->arch.fp.fpr[i][1] = val.vsxval[1];
 704                         } else {
 705                                 r = -ENXIO;
 706                         }
 707                         break;
 708 #endif /* CONFIG_VSX */
 709 #ifdef CONFIG_KVM_XICS
 710                 case KVM_REG_PPC_ICP_STATE:
 711                         if (!vcpu->arch.icp) {
 712                                 r = -ENXIO;
 713                                 break;
 714                         }
 715                         r = kvmppc_xics_set_icp(vcpu,
 716                                                 set_reg_val(reg->id, val));
 717                         break;
 718 #endif /* CONFIG_KVM_XICS */
 719                 default:
 720                         r = -EINVAL;
 721                         break;
 722                 }
 723         }
 724
 725         return r;
 726 }
 727
 728 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 729 {
 730         vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
 731 }
 732
 733 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
 734 {
 735         vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
 736 }
 737
 738 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 739 {
 740         vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
 741 }
 742 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
 743
 744 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 745 {
 746         return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
 747 }
 748
 749 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 750                                   struct kvm_translation *tr)
 751 {
 752         return 0;
 753 }
 754
 755 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 756                                         struct kvm_guest_debug *dbg)
 757 {
 758         return -EINVAL;
 759 }
 760
 761 void kvmppc_decrementer_func(unsigned long data)
 762 {
 763         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
 764
 765         kvmppc_core_queue_dec(vcpu);
 766         kvm_vcpu_kick(vcpu);
 767 }
 768
 769 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
 770 {
 771         return kvm->arch.kvm_ops->vcpu_create(kvm, id);
 772 }
 773
 774 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 775 {
 776         vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
 777 }
 778
 779 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 780 {
 781         return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
 782 }
 783
 784 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 785 {
 786         return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
 787 }
 788
 789 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 790                               struct kvm_memory_slot *dont)
 791 {
 792         kvm->arch.kvm_ops->free_memslot(free, dont);
 793 }
 794
 795 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 796                                unsigned long npages)
 797 {
 798         return kvm->arch.kvm_ops->create_memslot(slot, npages);
 799 }
 800
 801 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
 802 {
 803         kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
 804 }
 805
 806 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
 807                                 struct kvm_memory_slot *memslot,
 808                                 struct kvm_userspace_memory_region *mem)
 809 {
 810         return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
 811 }
 812
 813 void kvmppc_core_commit_memory_region(struct kvm *kvm,
 814                                 struct kvm_userspace_memory_region *mem,
 815                                 const struct kvm_memory_slot *old)
 816 {
 817         kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old);
 818 }
 819
 820 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
 821 {
 822         return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
 823 }
 824 EXPORT_SYMBOL_GPL(kvm_unmap_hva);
 825
 826 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
 827 {
 828         return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
 829 }
 830
 831 int kvm_age_hva(struct kvm *kvm, unsigned long hva)
 832 {
 833         return kvm->arch.kvm_ops->age_hva(kvm, hva);
 834 }
 835
 836 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
 837 {
 838         return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
 839 }
 840
 841 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 842 {
 843         kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
 844 }
 845
 846 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
 847 {
 848         vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
 849 }
 850
 851 int kvmppc_core_init_vm(struct kvm *kvm)
 852 {
 853
 854 #ifdef CONFIG_PPC64
 855         INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
 856         INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
 857 #endif
 858
 859         return kvm->arch.kvm_ops->init_vm(kvm);
 860 }
 861
 862 void kvmppc_core_destroy_vm(struct kvm *kvm)
 863 {
 864         kvm->arch.kvm_ops->destroy_vm(kvm);
 865
 866 #ifdef CONFIG_PPC64
 867         kvmppc_rtas_tokens_free(kvm);
 868         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
 869 #endif
 870 }
 871
 872 int kvmppc_core_check_processor_compat(void)
 873 {
 874         /*
 875          * We always return 0 for book3s. We check
 876          * for compatability while loading the HV
 877          * or PR module
 878          */
 879         return 0;
 880 }
 881
 882 static int kvmppc_book3s_init(void)
 883 {
 884         int r;
 885
 886         r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
 887         if (r)
 888                 return r;
 889 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 890         r = kvmppc_book3s_init_pr();
 891 #endif
 892         return r;
 893
 894 }
 895
 896 static void kvmppc_book3s_exit(void)
 897 {
 898 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 899         kvmppc_book3s_exit_pr();
 900 #endif
 901         kvm_exit();
 902 }
 903
 904 module_init(kvmppc_book3s_init);
 905 module_exit(kvmppc_book3s_exit);
 906
 907 /* On 32bit this is our one and only kernel module */
 908 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 909 MODULE_ALIAS_MISCDEV(KVM_MINOR);
 910 MODULE_ALIAS("devname:kvm");
 911 #endif