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 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu)
  76 {
  77         if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) {
  78                 ulong pc = kvmppc_get_pc(vcpu);
  79                 if ((pc & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
  80                         kvmppc_set_pc(vcpu, pc & ~SPLIT_HACK_MASK);
  81                 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SPLIT_HACK;
  82         }
  83 }
  84 EXPORT_SYMBOL_GPL(kvmppc_unfixup_split_real);
  85
  86 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
  87 {
  88         if (!is_kvmppc_hv_enabled(vcpu->kvm))
  89                 return to_book3s(vcpu)->hior;
  90         return 0;
  91 }
  92
  93 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
  94                         unsigned long pending_now, unsigned long old_pending)
  95 {
  96         if (is_kvmppc_hv_enabled(vcpu->kvm))
  97                 return;
  98         if (pending_now)
  99                 kvmppc_set_int_pending(vcpu, 1);
 100         else if (old_pending)
 101                 kvmppc_set_int_pending(vcpu, 0);
 102 }
 103
 104 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
 105 {
 106         ulong crit_raw;
 107         ulong crit_r1;
 108         bool crit;
 109
 110         if (is_kvmppc_hv_enabled(vcpu->kvm))
 111                 return false;
 112
 113         crit_raw = kvmppc_get_critical(vcpu);
 114         crit_r1 = kvmppc_get_gpr(vcpu, 1);
 115
 116         /* Truncate crit indicators in 32 bit mode */
 117         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 118                 crit_raw &= 0xffffffff;
 119                 crit_r1 &= 0xffffffff;
 120         }
 121
 122         /* Critical section when crit == r1 */
 123         crit = (crit_raw == crit_r1);
 124         /* ... and we're in supervisor mode */
 125         crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
 126
 127         return crit;
 128 }
 129
 130 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
 131 {
 132         kvmppc_unfixup_split_real(vcpu);
 133         kvmppc_set_srr0(vcpu, kvmppc_get_pc(vcpu));
 134         kvmppc_set_srr1(vcpu, kvmppc_get_msr(vcpu) | flags);
 135         kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
 136         vcpu->arch.mmu.reset_msr(vcpu);
 137 }
 138
 139 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
 140 {
 141         unsigned int prio;
 142
 143         switch (vec) {
 144         case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;         break;
 145         case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;        break;
 146         case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;         break;
 147         case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;         break;
 148         case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;         break;
 149         case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;         break;
 150         case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;             break;
 151         case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL;       break;
 152         case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;            break;
 153         case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;              break;
 154         case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;           break;
 155         case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;          break;
 156         case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;              break;
 157         case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;                break;
 158         case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;              break;
 159         case 0xf40: prio = BOOK3S_IRQPRIO_VSX;                  break;
 160         case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL;          break;
 161         default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
 162         }
 163
 164         return prio;
 165 }
 166
 167 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 168                                           unsigned int vec)
 169 {
 170         unsigned long old_pending = vcpu->arch.pending_exceptions;
 171
 172         clear_bit(kvmppc_book3s_vec2irqprio(vec),
 173                   &vcpu->arch.pending_exceptions);
 174
 175         kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
 176                                   old_pending);
 177 }
 178
 179 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
 180 {
 181         vcpu->stat.queue_intr++;
 182
 183         set_bit(kvmppc_book3s_vec2irqprio(vec),
 184                 &vcpu->arch.pending_exceptions);
 185 #ifdef EXIT_DEBUG
 186         printk(KERN_INFO "Queueing interrupt %x\n", vec);
 187 #endif
 188 }
 189 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
 190
 191 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
 192 {
 193         /* might as well deliver this straight away */
 194         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
 195 }
 196 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
 197
 198 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 199 {
 200         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 201 }
 202 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
 203
 204 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 205 {
 206         return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 207 }
 208 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
 209
 210 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 211 {
 212         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 213 }
 214 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
 215
 216 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 217                                 struct kvm_interrupt *irq)
 218 {
 219         unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
 220
 221         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 222                 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
 223
 224         kvmppc_book3s_queue_irqprio(vcpu, vec);
 225 }
 226
 227 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 228 {
 229         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 230         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
 231 }
 232
 233 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
 234 {
 235         int deliver = 1;
 236         int vec = 0;
 237         bool crit = kvmppc_critical_section(vcpu);
 238
 239         switch (priority) {
 240         case BOOK3S_IRQPRIO_DECREMENTER:
 241                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 242                 vec = BOOK3S_INTERRUPT_DECREMENTER;
 243                 break;
 244         case BOOK3S_IRQPRIO_EXTERNAL:
 245         case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 246                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 247                 vec = BOOK3S_INTERRUPT_EXTERNAL;
 248                 break;
 249         case BOOK3S_IRQPRIO_SYSTEM_RESET:
 250                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
 251                 break;
 252         case BOOK3S_IRQPRIO_MACHINE_CHECK:
 253                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
 254                 break;
 255         case BOOK3S_IRQPRIO_DATA_STORAGE:
 256                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
 257                 break;
 258         case BOOK3S_IRQPRIO_INST_STORAGE:
 259                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
 260                 break;
 261         case BOOK3S_IRQPRIO_DATA_SEGMENT:
 262                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
 263                 break;
 264         case BOOK3S_IRQPRIO_INST_SEGMENT:
 265                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
 266                 break;
 267         case BOOK3S_IRQPRIO_ALIGNMENT:
 268                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
 269                 break;
 270         case BOOK3S_IRQPRIO_PROGRAM:
 271                 vec = BOOK3S_INTERRUPT_PROGRAM;
 272                 break;
 273         case BOOK3S_IRQPRIO_VSX:
 274                 vec = BOOK3S_INTERRUPT_VSX;
 275                 break;
 276         case BOOK3S_IRQPRIO_ALTIVEC:
 277                 vec = BOOK3S_INTERRUPT_ALTIVEC;
 278                 break;
 279         case BOOK3S_IRQPRIO_FP_UNAVAIL:
 280                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
 281                 break;
 282         case BOOK3S_IRQPRIO_SYSCALL:
 283                 vec = BOOK3S_INTERRUPT_SYSCALL;
 284                 break;
 285         case BOOK3S_IRQPRIO_DEBUG:
 286                 vec = BOOK3S_INTERRUPT_TRACE;
 287                 break;
 288         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
 289                 vec = BOOK3S_INTERRUPT_PERFMON;
 290                 break;
 291         case BOOK3S_IRQPRIO_FAC_UNAVAIL:
 292                 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
 293                 break;
 294         default:
 295                 deliver = 0;
 296                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
 297                 break;
 298         }
 299
 300 #if 0
 301         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
 302 #endif
 303
 304         if (deliver)
 305                 kvmppc_inject_interrupt(vcpu, vec, 0);
 306
 307         return deliver;
 308 }
 309
 310 /*
 311  * This function determines if an irqprio should be cleared once issued.
 312  */
 313 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
 314 {
 315         switch (priority) {
 316                 case BOOK3S_IRQPRIO_DECREMENTER:
 317                         /* DEC interrupts get cleared by mtdec */
 318                         return false;
 319                 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 320                         /* External interrupts get cleared by userspace */
 321                         return false;
 322         }
 323
 324         return true;
 325 }
 326
 327 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 328 {
 329         unsigned long *pending = &vcpu->arch.pending_exceptions;
 330         unsigned long old_pending = vcpu->arch.pending_exceptions;
 331         unsigned int priority;
 332
 333 #ifdef EXIT_DEBUG
 334         if (vcpu->arch.pending_exceptions)
 335                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
 336 #endif
 337         priority = __ffs(*pending);
 338         while (priority < BOOK3S_IRQPRIO_MAX) {
 339                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
 340                     clear_irqprio(vcpu, priority)) {
 341                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 342                         break;
 343                 }
 344
 345                 priority = find_next_bit(pending,
 346                                          BITS_PER_BYTE * sizeof(*pending),
 347                                          priority + 1);
 348         }
 349
 350         /* Tell the guest about our interrupt status */
 351         kvmppc_update_int_pending(vcpu, *pending, old_pending);
 352
 353         return 0;
 354 }
 355 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
 356
 357 pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
 358                         bool *writable)
 359 {
 360         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
 361         gfn_t gfn = gpa >> PAGE_SHIFT;
 362
 363         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 364                 mp_pa = (uint32_t)mp_pa;
 365
 366         /* Magic page override */
 367         gpa &= ~0xFFFULL;
 368         if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
 369                 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
 370                 pfn_t pfn;
 371
 372                 pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
 373                 get_page(pfn_to_page(pfn));
 374                 if (writable)
 375                         *writable = true;
 376                 return pfn;
 377         }
 378
 379         return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
 380 }
 381 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
 382
 383 static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
 384                         bool iswrite, struct kvmppc_pte *pte)
 385 {
 386         int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
 387         int r;
 388
 389         if (relocated) {
 390                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
 391         } else {
 392                 pte->eaddr = eaddr;
 393                 pte->raddr = eaddr & KVM_PAM;
 394                 pte->vpage = VSID_REAL | eaddr >> 12;
 395                 pte->may_read = true;
 396                 pte->may_write = true;
 397                 pte->may_execute = true;
 398                 r = 0;
 399
 400                 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
 401                     !data) {
 402                         if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
 403                             ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
 404                         pte->raddr &= ~SPLIT_HACK_MASK;
 405                 }
 406         }
 407
 408         return r;
 409 }
 410
 411 static hva_t kvmppc_bad_hva(void)
 412 {
 413         return PAGE_OFFSET;
 414 }
 415
 416 static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
 417                                bool read)
 418 {
 419         hva_t hpage;
 420
 421         if (read && !pte->may_read)
 422                 goto err;
 423
 424         if (!read && !pte->may_write)
 425                 goto err;
 426
 427         hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
 428         if (kvm_is_error_hva(hpage))
 429                 goto err;
 430
 431         return hpage | (pte->raddr & ~PAGE_MASK);
 432 err:
 433         return kvmppc_bad_hva();
 434 }
 435
 436 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 437               bool data)
 438 {
 439         struct kvmppc_pte pte;
 440         int r;
 441
 442         vcpu->stat.st++;
 443
 444         r = kvmppc_xlate(vcpu, *eaddr, data, true, &pte);
 445         if (r < 0)
 446                 return r;
 447
 448         *eaddr = pte.raddr;
 449
 450         if (!pte.may_write)
 451                 return -EPERM;
 452
 453         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 454                 return EMULATE_DO_MMIO;
 455
 456         return EMULATE_DONE;
 457 }
 458 EXPORT_SYMBOL_GPL(kvmppc_st);
 459
 460 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 461                       bool data)
 462 {
 463         struct kvmppc_pte pte;
 464         hva_t hva = *eaddr;
 465
 466         vcpu->stat.ld++;
 467
 468         if (kvmppc_xlate(vcpu, *eaddr, data, false, &pte))
 469                 goto nopte;
 470
 471         *eaddr = pte.raddr;
 472
 473         hva = kvmppc_pte_to_hva(vcpu, &pte, true);
 474         if (kvm_is_error_hva(hva))
 475                 goto mmio;
 476
 477         if (copy_from_user(ptr, (void __user *)hva, size)) {
 478                 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
 479                 goto mmio;
 480         }
 481
 482         return EMULATE_DONE;
 483
 484 nopte:
 485         return -ENOENT;
 486 mmio:
 487         return EMULATE_DO_MMIO;
 488 }
 489 EXPORT_SYMBOL_GPL(kvmppc_ld);
 490
 491 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 492 {
 493         return 0;
 494 }
 495
 496 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
 497 {
 498         return 0;
 499 }
 500
 501 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
 502 {
 503 }
 504
 505 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 506                                   struct kvm_sregs *sregs)
 507 {
 508         return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
 509 }
 510
 511 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 512                                   struct kvm_sregs *sregs)
 513 {
 514         return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
 515 }
 516
 517 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 518 {
 519         int i;
 520
 521         regs->pc = kvmppc_get_pc(vcpu);
 522         regs->cr = kvmppc_get_cr(vcpu);
 523         regs->ctr = kvmppc_get_ctr(vcpu);
 524         regs->lr = kvmppc_get_lr(vcpu);
 525         regs->xer = kvmppc_get_xer(vcpu);
 526         regs->msr = kvmppc_get_msr(vcpu);
 527         regs->srr0 = kvmppc_get_srr0(vcpu);
 528         regs->srr1 = kvmppc_get_srr1(vcpu);
 529         regs->pid = vcpu->arch.pid;
 530         regs->sprg0 = kvmppc_get_sprg0(vcpu);
 531         regs->sprg1 = kvmppc_get_sprg1(vcpu);
 532         regs->sprg2 = kvmppc_get_sprg2(vcpu);
 533         regs->sprg3 = kvmppc_get_sprg3(vcpu);
 534         regs->sprg4 = kvmppc_get_sprg4(vcpu);
 535         regs->sprg5 = kvmppc_get_sprg5(vcpu);
 536         regs->sprg6 = kvmppc_get_sprg6(vcpu);
 537         regs->sprg7 = kvmppc_get_sprg7(vcpu);
 538
 539         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 540                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 541
 542         return 0;
 543 }
 544
 545 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 546 {
 547         int i;
 548
 549         kvmppc_set_pc(vcpu, regs->pc);
 550         kvmppc_set_cr(vcpu, regs->cr);
 551         kvmppc_set_ctr(vcpu, regs->ctr);
 552         kvmppc_set_lr(vcpu, regs->lr);
 553         kvmppc_set_xer(vcpu, regs->xer);
 554         kvmppc_set_msr(vcpu, regs->msr);
 555         kvmppc_set_srr0(vcpu, regs->srr0);
 556         kvmppc_set_srr1(vcpu, regs->srr1);
 557         kvmppc_set_sprg0(vcpu, regs->sprg0);
 558         kvmppc_set_sprg1(vcpu, regs->sprg1);
 559         kvmppc_set_sprg2(vcpu, regs->sprg2);
 560         kvmppc_set_sprg3(vcpu, regs->sprg3);
 561         kvmppc_set_sprg4(vcpu, regs->sprg4);
 562         kvmppc_set_sprg5(vcpu, regs->sprg5);
 563         kvmppc_set_sprg6(vcpu, regs->sprg6);
 564         kvmppc_set_sprg7(vcpu, regs->sprg7);
 565
 566         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 567                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 568
 569         return 0;
 570 }
 571
 572 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 573 {
 574         return -ENOTSUPP;
 575 }
 576
 577 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 578 {
 579         return -ENOTSUPP;
 580 }
 581
 582 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 583 {
 584         int r;
 585         union kvmppc_one_reg val;
 586         int size;
 587         long int i;
 588
 589         size = one_reg_size(reg->id);
 590         if (size > sizeof(val))
 591                 return -EINVAL;
 592
 593         r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, reg->id, &val);
 594         if (r == -EINVAL) {
 595                 r = 0;
 596                 switch (reg->id) {
 597                 case KVM_REG_PPC_DAR:
 598                         val = get_reg_val(reg->id, kvmppc_get_dar(vcpu));
 599                         break;
 600                 case KVM_REG_PPC_DSISR:
 601                         val = get_reg_val(reg->id, kvmppc_get_dsisr(vcpu));
 602                         break;
 603                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 604                         i = reg->id - KVM_REG_PPC_FPR0;
 605                         val = get_reg_val(reg->id, VCPU_FPR(vcpu, i));
 606                         break;
 607                 case KVM_REG_PPC_FPSCR:
 608                         val = get_reg_val(reg->id, vcpu->arch.fp.fpscr);
 609                         break;
 610 #ifdef CONFIG_ALTIVEC
 611                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
 612                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 613                                 r = -ENXIO;
 614                                 break;
 615                         }
 616                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
 617                         break;
 618                 case KVM_REG_PPC_VSCR:
 619                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 620                                 r = -ENXIO;
 621                                 break;
 622                         }
 623                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
 624                         break;
 625                 case KVM_REG_PPC_VRSAVE:
 626                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
 627                         break;
 628 #endif /* CONFIG_ALTIVEC */
 629 #ifdef CONFIG_VSX
 630                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 631                         if (cpu_has_feature(CPU_FTR_VSX)) {
 632                                 long int i = reg->id - KVM_REG_PPC_VSR0;
 633                                 val.vsxval[0] = vcpu->arch.fp.fpr[i][0];
 634                                 val.vsxval[1] = vcpu->arch.fp.fpr[i][1];
 635                         } else {
 636                                 r = -ENXIO;
 637                         }
 638                         break;
 639 #endif /* CONFIG_VSX */
 640                 case KVM_REG_PPC_DEBUG_INST: {
 641                         u32 opcode = INS_TW;
 642                         r = copy_to_user((u32 __user *)(long)reg->addr,
 643                                          &opcode, sizeof(u32));
 644                         break;
 645                 }
 646 #ifdef CONFIG_KVM_XICS
 647                 case KVM_REG_PPC_ICP_STATE:
 648                         if (!vcpu->arch.icp) {
 649                                 r = -ENXIO;
 650                                 break;
 651                         }
 652                         val = get_reg_val(reg->id, kvmppc_xics_get_icp(vcpu));
 653                         break;
 654 #endif /* CONFIG_KVM_XICS */
 655                 case KVM_REG_PPC_FSCR:
 656                         val = get_reg_val(reg->id, vcpu->arch.fscr);
 657                         break;
 658                 case KVM_REG_PPC_TAR:
 659                         val = get_reg_val(reg->id, vcpu->arch.tar);
 660                         break;
 661                 case KVM_REG_PPC_EBBHR:
 662                         val = get_reg_val(reg->id, vcpu->arch.ebbhr);
 663                         break;
 664                 case KVM_REG_PPC_EBBRR:
 665                         val = get_reg_val(reg->id, vcpu->arch.ebbrr);
 666                         break;
 667                 case KVM_REG_PPC_BESCR:
 668                         val = get_reg_val(reg->id, vcpu->arch.bescr);
 669                         break;
 670                 case KVM_REG_PPC_VTB:
 671                         val = get_reg_val(reg->id, vcpu->arch.vtb);
 672                         break;
 673                 case KVM_REG_PPC_IC:
 674                         val = get_reg_val(reg->id, vcpu->arch.ic);
 675                         break;
 676                 default:
 677                         r = -EINVAL;
 678                         break;
 679                 }
 680         }
 681         if (r)
 682                 return r;
 683
 684         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
 685                 r = -EFAULT;
 686
 687         return r;
 688 }
 689
 690 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 691 {
 692         int r;
 693         union kvmppc_one_reg val;
 694         int size;
 695         long int i;
 696
 697         size = one_reg_size(reg->id);
 698         if (size > sizeof(val))
 699                 return -EINVAL;
 700
 701         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
 702                 return -EFAULT;
 703
 704         r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, reg->id, &val);
 705         if (r == -EINVAL) {
 706                 r = 0;
 707                 switch (reg->id) {
 708                 case KVM_REG_PPC_DAR:
 709                         kvmppc_set_dar(vcpu, set_reg_val(reg->id, val));
 710                         break;
 711                 case KVM_REG_PPC_DSISR:
 712                         kvmppc_set_dsisr(vcpu, set_reg_val(reg->id, val));
 713                         break;
 714                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 715                         i = reg->id - KVM_REG_PPC_FPR0;
 716                         VCPU_FPR(vcpu, i) = set_reg_val(reg->id, val);
 717                         break;
 718                 case KVM_REG_PPC_FPSCR:
 719                         vcpu->arch.fp.fpscr = set_reg_val(reg->id, val);
 720                         break;
 721 #ifdef CONFIG_ALTIVEC
 722                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
 723                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 724                                 r = -ENXIO;
 725                                 break;
 726                         }
 727                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
 728                         break;
 729                 case KVM_REG_PPC_VSCR:
 730                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 731                                 r = -ENXIO;
 732                                 break;
 733                         }
 734                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
 735                         break;
 736                 case KVM_REG_PPC_VRSAVE:
 737                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 738                                 r = -ENXIO;
 739                                 break;
 740                         }
 741                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
 742                         break;
 743 #endif /* CONFIG_ALTIVEC */
 744 #ifdef CONFIG_VSX
 745                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 746                         if (cpu_has_feature(CPU_FTR_VSX)) {
 747                                 long int i = reg->id - KVM_REG_PPC_VSR0;
 748                                 vcpu->arch.fp.fpr[i][0] = val.vsxval[0];
 749                                 vcpu->arch.fp.fpr[i][1] = val.vsxval[1];
 750                         } else {
 751                                 r = -ENXIO;
 752                         }
 753                         break;
 754 #endif /* CONFIG_VSX */
 755 #ifdef CONFIG_KVM_XICS
 756                 case KVM_REG_PPC_ICP_STATE:
 757                         if (!vcpu->arch.icp) {
 758                                 r = -ENXIO;
 759                                 break;
 760                         }
 761                         r = kvmppc_xics_set_icp(vcpu,
 762                                                 set_reg_val(reg->id, val));
 763                         break;
 764 #endif /* CONFIG_KVM_XICS */
 765                 case KVM_REG_PPC_FSCR:
 766                         vcpu->arch.fscr = set_reg_val(reg->id, val);
 767                         break;
 768                 case KVM_REG_PPC_TAR:
 769                         vcpu->arch.tar = set_reg_val(reg->id, val);
 770                         break;
 771                 case KVM_REG_PPC_EBBHR:
 772                         vcpu->arch.ebbhr = set_reg_val(reg->id, val);
 773                         break;
 774                 case KVM_REG_PPC_EBBRR:
 775                         vcpu->arch.ebbrr = set_reg_val(reg->id, val);
 776                         break;
 777                 case KVM_REG_PPC_BESCR:
 778                         vcpu->arch.bescr = set_reg_val(reg->id, val);
 779                         break;
 780                 case KVM_REG_PPC_VTB:
 781                         vcpu->arch.vtb = set_reg_val(reg->id, val);
 782                         break;
 783                 case KVM_REG_PPC_IC:
 784                         vcpu->arch.ic = set_reg_val(reg->id, val);
 785                         break;
 786                 default:
 787                         r = -EINVAL;
 788                         break;
 789                 }
 790         }
 791
 792         return r;
 793 }
 794
 795 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 796 {
 797         vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
 798 }
 799
 800 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
 801 {
 802         vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
 803 }
 804
 805 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 806 {
 807         vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
 808 }
 809 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
 810
 811 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 812 {
 813         return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
 814 }
 815
 816 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 817                                   struct kvm_translation *tr)
 818 {
 819         return 0;
 820 }
 821
 822 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 823                                         struct kvm_guest_debug *dbg)
 824 {
 825         return -EINVAL;
 826 }
 827
 828 void kvmppc_decrementer_func(unsigned long data)
 829 {
 830         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
 831
 832         kvmppc_core_queue_dec(vcpu);
 833         kvm_vcpu_kick(vcpu);
 834 }
 835
 836 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
 837 {
 838         return kvm->arch.kvm_ops->vcpu_create(kvm, id);
 839 }
 840
 841 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 842 {
 843         vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
 844 }
 845
 846 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 847 {
 848         return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
 849 }
 850
 851 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 852 {
 853         return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
 854 }
 855
 856 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 857                               struct kvm_memory_slot *dont)
 858 {
 859         kvm->arch.kvm_ops->free_memslot(free, dont);
 860 }
 861
 862 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 863                                unsigned long npages)
 864 {
 865         return kvm->arch.kvm_ops->create_memslot(slot, npages);
 866 }
 867
 868 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
 869 {
 870         kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
 871 }
 872
 873 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
 874                                 struct kvm_memory_slot *memslot,
 875                                 struct kvm_userspace_memory_region *mem)
 876 {
 877         return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
 878 }
 879
 880 void kvmppc_core_commit_memory_region(struct kvm *kvm,
 881                                 struct kvm_userspace_memory_region *mem,
 882                                 const struct kvm_memory_slot *old)
 883 {
 884         kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old);
 885 }
 886
 887 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
 888 {
 889         return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
 890 }
 891 EXPORT_SYMBOL_GPL(kvm_unmap_hva);
 892
 893 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
 894 {
 895         return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
 896 }
 897
 898 int kvm_age_hva(struct kvm *kvm, unsigned long hva)
 899 {
 900         return kvm->arch.kvm_ops->age_hva(kvm, hva);
 901 }
 902
 903 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
 904 {
 905         return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
 906 }
 907
 908 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 909 {
 910         kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
 911 }
 912
 913 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
 914 {
 915         vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
 916 }
 917
 918 int kvmppc_core_init_vm(struct kvm *kvm)
 919 {
 920
 921 #ifdef CONFIG_PPC64
 922         INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
 923         INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
 924 #endif
 925
 926         return kvm->arch.kvm_ops->init_vm(kvm);
 927 }
 928
 929 void kvmppc_core_destroy_vm(struct kvm *kvm)
 930 {
 931         kvm->arch.kvm_ops->destroy_vm(kvm);
 932
 933 #ifdef CONFIG_PPC64
 934         kvmppc_rtas_tokens_free(kvm);
 935         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
 936 #endif
 937 }
 938
 939 int kvmppc_core_check_processor_compat(void)
 940 {
 941         /*
 942          * We always return 0 for book3s. We check
 943          * for compatability while loading the HV
 944          * or PR module
 945          */
 946         return 0;
 947 }
 948
 949 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
 950 {
 951         return kvm->arch.kvm_ops->hcall_implemented(hcall);
 952 }
 953
 954 static int kvmppc_book3s_init(void)
 955 {
 956         int r;
 957
 958         r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
 959         if (r)
 960                 return r;
 961 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 962         r = kvmppc_book3s_init_pr();
 963 #endif
 964         return r;
 965
 966 }
 967
 968 static void kvmppc_book3s_exit(void)
 969 {
 970 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 971         kvmppc_book3s_exit_pr();
 972 #endif
 973         kvm_exit();
 974 }
 975
 976 module_init(kvmppc_book3s_init);
 977 module_exit(kvmppc_book3s_exit);
 978
 979 /* On 32bit this is our one and only kernel module */
 980 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 981 MODULE_ALIAS_MISCDEV(KVM_MINOR);
 982 MODULE_ALIAS("devname:kvm");
 983 #endif