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                 kvmppc_set_int_pending(vcpu, 1);
  89         else if (old_pending)
  90                 kvmppc_set_int_pending(vcpu, 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 = kvmppc_get_critical(vcpu);
 103         crit_r1 = kvmppc_get_gpr(vcpu, 1);
 104
 105         /* Truncate crit indicators in 32 bit mode */
 106         if (!(kvmppc_get_msr(vcpu) & 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 && !(kvmppc_get_msr(vcpu) & MSR_PR);
 115
 116         return crit;
 117 }
 118
 119 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
 120 {
 121         kvmppc_set_srr0(vcpu, kvmppc_get_pc(vcpu));
 122         kvmppc_set_srr1(vcpu, kvmppc_get_msr(vcpu) | 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         case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL;          break;
 149         default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
 150         }
 151
 152         return prio;
 153 }
 154
 155 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 156                                           unsigned int vec)
 157 {
 158         unsigned long old_pending = vcpu->arch.pending_exceptions;
 159
 160         clear_bit(kvmppc_book3s_vec2irqprio(vec),
 161                   &vcpu->arch.pending_exceptions);
 162
 163         kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
 164                                   old_pending);
 165 }
 166
 167 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
 168 {
 169         vcpu->stat.queue_intr++;
 170
 171         set_bit(kvmppc_book3s_vec2irqprio(vec),
 172                 &vcpu->arch.pending_exceptions);
 173 #ifdef EXIT_DEBUG
 174         printk(KERN_INFO "Queueing interrupt %x\n", vec);
 175 #endif
 176 }
 177 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
 178
 179 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
 180 {
 181         /* might as well deliver this straight away */
 182         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
 183 }
 184 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
 185
 186 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 187 {
 188         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 189 }
 190 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
 191
 192 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 193 {
 194         return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 195 }
 196 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
 197
 198 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 199 {
 200         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 201 }
 202 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
 203
 204 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 205                                 struct kvm_interrupt *irq)
 206 {
 207         unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
 208
 209         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 210                 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
 211
 212         kvmppc_book3s_queue_irqprio(vcpu, vec);
 213 }
 214
 215 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 216 {
 217         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 218         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
 219 }
 220
 221 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
 222 {
 223         int deliver = 1;
 224         int vec = 0;
 225         bool crit = kvmppc_critical_section(vcpu);
 226
 227         switch (priority) {
 228         case BOOK3S_IRQPRIO_DECREMENTER:
 229                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 230                 vec = BOOK3S_INTERRUPT_DECREMENTER;
 231                 break;
 232         case BOOK3S_IRQPRIO_EXTERNAL:
 233         case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 234                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 235                 vec = BOOK3S_INTERRUPT_EXTERNAL;
 236                 break;
 237         case BOOK3S_IRQPRIO_SYSTEM_RESET:
 238                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
 239                 break;
 240         case BOOK3S_IRQPRIO_MACHINE_CHECK:
 241                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
 242                 break;
 243         case BOOK3S_IRQPRIO_DATA_STORAGE:
 244                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
 245                 break;
 246         case BOOK3S_IRQPRIO_INST_STORAGE:
 247                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
 248                 break;
 249         case BOOK3S_IRQPRIO_DATA_SEGMENT:
 250                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
 251                 break;
 252         case BOOK3S_IRQPRIO_INST_SEGMENT:
 253                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
 254                 break;
 255         case BOOK3S_IRQPRIO_ALIGNMENT:
 256                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
 257                 break;
 258         case BOOK3S_IRQPRIO_PROGRAM:
 259                 vec = BOOK3S_INTERRUPT_PROGRAM;
 260                 break;
 261         case BOOK3S_IRQPRIO_VSX:
 262                 vec = BOOK3S_INTERRUPT_VSX;
 263                 break;
 264         case BOOK3S_IRQPRIO_ALTIVEC:
 265                 vec = BOOK3S_INTERRUPT_ALTIVEC;
 266                 break;
 267         case BOOK3S_IRQPRIO_FP_UNAVAIL:
 268                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
 269                 break;
 270         case BOOK3S_IRQPRIO_SYSCALL:
 271                 vec = BOOK3S_INTERRUPT_SYSCALL;
 272                 break;
 273         case BOOK3S_IRQPRIO_DEBUG:
 274                 vec = BOOK3S_INTERRUPT_TRACE;
 275                 break;
 276         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
 277                 vec = BOOK3S_INTERRUPT_PERFMON;
 278                 break;
 279         case BOOK3S_IRQPRIO_FAC_UNAVAIL:
 280                 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
 281                 break;
 282         default:
 283                 deliver = 0;
 284                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
 285                 break;
 286         }
 287
 288 #if 0
 289         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
 290 #endif
 291
 292         if (deliver)
 293                 kvmppc_inject_interrupt(vcpu, vec, 0);
 294
 295         return deliver;
 296 }
 297
 298 /*
 299  * This function determines if an irqprio should be cleared once issued.
 300  */
 301 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
 302 {
 303         switch (priority) {
 304                 case BOOK3S_IRQPRIO_DECREMENTER:
 305                         /* DEC interrupts get cleared by mtdec */
 306                         return false;
 307                 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 308                         /* External interrupts get cleared by userspace */
 309                         return false;
 310         }
 311
 312         return true;
 313 }
 314
 315 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 316 {
 317         unsigned long *pending = &vcpu->arch.pending_exceptions;
 318         unsigned long old_pending = vcpu->arch.pending_exceptions;
 319         unsigned int priority;
 320
 321 #ifdef EXIT_DEBUG
 322         if (vcpu->arch.pending_exceptions)
 323                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
 324 #endif
 325         priority = __ffs(*pending);
 326         while (priority < BOOK3S_IRQPRIO_MAX) {
 327                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
 328                     clear_irqprio(vcpu, priority)) {
 329                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 330                         break;
 331                 }
 332
 333                 priority = find_next_bit(pending,
 334                                          BITS_PER_BYTE * sizeof(*pending),
 335                                          priority + 1);
 336         }
 337
 338         /* Tell the guest about our interrupt status */
 339         kvmppc_update_int_pending(vcpu, *pending, old_pending);
 340
 341         return 0;
 342 }
 343 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
 344
 345 pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn, bool writing,
 346                         bool *writable)
 347 {
 348         ulong mp_pa = vcpu->arch.magic_page_pa;
 349
 350         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 351                 mp_pa = (uint32_t)mp_pa;
 352
 353         /* Magic page override */
 354         if (unlikely(mp_pa) &&
 355             unlikely(((gfn << PAGE_SHIFT) & KVM_PAM) ==
 356                      ((mp_pa & PAGE_MASK) & KVM_PAM))) {
 357                 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
 358                 pfn_t pfn;
 359
 360                 pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
 361                 get_page(pfn_to_page(pfn));
 362                 if (writable)
 363                         *writable = true;
 364                 return pfn;
 365         }
 366
 367         return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
 368 }
 369 EXPORT_SYMBOL_GPL(kvmppc_gfn_to_pfn);
 370
 371 static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
 372                         bool iswrite, struct kvmppc_pte *pte)
 373 {
 374         int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
 375         int r;
 376
 377         if (relocated) {
 378                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
 379         } else {
 380                 pte->eaddr = eaddr;
 381                 pte->raddr = eaddr & KVM_PAM;
 382                 pte->vpage = VSID_REAL | eaddr >> 12;
 383                 pte->may_read = true;
 384                 pte->may_write = true;
 385                 pte->may_execute = true;
 386                 r = 0;
 387         }
 388
 389         return r;
 390 }
 391
 392 static hva_t kvmppc_bad_hva(void)
 393 {
 394         return PAGE_OFFSET;
 395 }
 396
 397 static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
 398                                bool read)
 399 {
 400         hva_t hpage;
 401
 402         if (read && !pte->may_read)
 403                 goto err;
 404
 405         if (!read && !pte->may_write)
 406                 goto err;
 407
 408         hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
 409         if (kvm_is_error_hva(hpage))
 410                 goto err;
 411
 412         return hpage | (pte->raddr & ~PAGE_MASK);
 413 err:
 414         return kvmppc_bad_hva();
 415 }
 416
 417 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 418               bool data)
 419 {
 420         struct kvmppc_pte pte;
 421
 422         vcpu->stat.st++;
 423
 424         if (kvmppc_xlate(vcpu, *eaddr, data, true, &pte))
 425                 return -ENOENT;
 426
 427         *eaddr = pte.raddr;
 428
 429         if (!pte.may_write)
 430                 return -EPERM;
 431
 432         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 433                 return EMULATE_DO_MMIO;
 434
 435         return EMULATE_DONE;
 436 }
 437 EXPORT_SYMBOL_GPL(kvmppc_st);
 438
 439 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 440                       bool data)
 441 {
 442         struct kvmppc_pte pte;
 443         hva_t hva = *eaddr;
 444
 445         vcpu->stat.ld++;
 446
 447         if (kvmppc_xlate(vcpu, *eaddr, data, false, &pte))
 448                 goto nopte;
 449
 450         *eaddr = pte.raddr;
 451
 452         hva = kvmppc_pte_to_hva(vcpu, &pte, true);
 453         if (kvm_is_error_hva(hva))
 454                 goto mmio;
 455
 456         if (copy_from_user(ptr, (void __user *)hva, size)) {
 457                 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
 458                 goto mmio;
 459         }
 460
 461         return EMULATE_DONE;
 462
 463 nopte:
 464         return -ENOENT;
 465 mmio:
 466         return EMULATE_DO_MMIO;
 467 }
 468 EXPORT_SYMBOL_GPL(kvmppc_ld);
 469
 470 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 471 {
 472         return 0;
 473 }
 474
 475 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
 476 {
 477         return 0;
 478 }
 479
 480 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
 481 {
 482 }
 483
 484 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 485                                   struct kvm_sregs *sregs)
 486 {
 487         return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
 488 }
 489
 490 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 491                                   struct kvm_sregs *sregs)
 492 {
 493         return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
 494 }
 495
 496 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 497 {
 498         int i;
 499
 500         regs->pc = kvmppc_get_pc(vcpu);
 501         regs->cr = kvmppc_get_cr(vcpu);
 502         regs->ctr = kvmppc_get_ctr(vcpu);
 503         regs->lr = kvmppc_get_lr(vcpu);
 504         regs->xer = kvmppc_get_xer(vcpu);
 505         regs->msr = kvmppc_get_msr(vcpu);
 506         regs->srr0 = kvmppc_get_srr0(vcpu);
 507         regs->srr1 = kvmppc_get_srr1(vcpu);
 508         regs->pid = vcpu->arch.pid;
 509         regs->sprg0 = kvmppc_get_sprg0(vcpu);
 510         regs->sprg1 = kvmppc_get_sprg1(vcpu);
 511         regs->sprg2 = kvmppc_get_sprg2(vcpu);
 512         regs->sprg3 = kvmppc_get_sprg3(vcpu);
 513         regs->sprg4 = kvmppc_get_sprg4(vcpu);
 514         regs->sprg5 = kvmppc_get_sprg5(vcpu);
 515         regs->sprg6 = kvmppc_get_sprg6(vcpu);
 516         regs->sprg7 = kvmppc_get_sprg7(vcpu);
 517
 518         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 519                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 520
 521         return 0;
 522 }
 523
 524 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 525 {
 526         int i;
 527
 528         kvmppc_set_pc(vcpu, regs->pc);
 529         kvmppc_set_cr(vcpu, regs->cr);
 530         kvmppc_set_ctr(vcpu, regs->ctr);
 531         kvmppc_set_lr(vcpu, regs->lr);
 532         kvmppc_set_xer(vcpu, regs->xer);
 533         kvmppc_set_msr(vcpu, regs->msr);
 534         kvmppc_set_srr0(vcpu, regs->srr0);
 535         kvmppc_set_srr1(vcpu, regs->srr1);
 536         kvmppc_set_sprg0(vcpu, regs->sprg0);
 537         kvmppc_set_sprg1(vcpu, regs->sprg1);
 538         kvmppc_set_sprg2(vcpu, regs->sprg2);
 539         kvmppc_set_sprg3(vcpu, regs->sprg3);
 540         kvmppc_set_sprg4(vcpu, regs->sprg4);
 541         kvmppc_set_sprg5(vcpu, regs->sprg5);
 542         kvmppc_set_sprg6(vcpu, regs->sprg6);
 543         kvmppc_set_sprg7(vcpu, regs->sprg7);
 544
 545         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 546                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 547
 548         return 0;
 549 }
 550
 551 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 552 {
 553         return -ENOTSUPP;
 554 }
 555
 556 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 557 {
 558         return -ENOTSUPP;
 559 }
 560
 561 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 562 {
 563         int r;
 564         union kvmppc_one_reg val;
 565         int size;
 566         long int i;
 567
 568         size = one_reg_size(reg->id);
 569         if (size > sizeof(val))
 570                 return -EINVAL;
 571
 572         r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, reg->id, &val);
 573         if (r == -EINVAL) {
 574                 r = 0;
 575                 switch (reg->id) {
 576                 case KVM_REG_PPC_DAR:
 577                         val = get_reg_val(reg->id, kvmppc_get_dar(vcpu));
 578                         break;
 579                 case KVM_REG_PPC_DSISR:
 580                         val = get_reg_val(reg->id, kvmppc_get_dsisr(vcpu));
 581                         break;
 582                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 583                         i = reg->id - KVM_REG_PPC_FPR0;
 584                         val = get_reg_val(reg->id, VCPU_FPR(vcpu, i));
 585                         break;
 586                 case KVM_REG_PPC_FPSCR:
 587                         val = get_reg_val(reg->id, vcpu->arch.fp.fpscr);
 588                         break;
 589 #ifdef CONFIG_ALTIVEC
 590                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
 591                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 592                                 r = -ENXIO;
 593                                 break;
 594                         }
 595                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
 596                         break;
 597                 case KVM_REG_PPC_VSCR:
 598                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 599                                 r = -ENXIO;
 600                                 break;
 601                         }
 602                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
 603                         break;
 604                 case KVM_REG_PPC_VRSAVE:
 605                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
 606                         break;
 607 #endif /* CONFIG_ALTIVEC */
 608 #ifdef CONFIG_VSX
 609                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 610                         if (cpu_has_feature(CPU_FTR_VSX)) {
 611                                 long int i = reg->id - KVM_REG_PPC_VSR0;
 612                                 val.vsxval[0] = vcpu->arch.fp.fpr[i][0];
 613                                 val.vsxval[1] = vcpu->arch.fp.fpr[i][1];
 614                         } else {
 615                                 r = -ENXIO;
 616                         }
 617                         break;
 618 #endif /* CONFIG_VSX */
 619                 case KVM_REG_PPC_DEBUG_INST: {
 620                         u32 opcode = INS_TW;
 621                         r = copy_to_user((u32 __user *)(long)reg->addr,
 622                                          &opcode, sizeof(u32));
 623                         break;
 624                 }
 625 #ifdef CONFIG_KVM_XICS
 626                 case KVM_REG_PPC_ICP_STATE:
 627                         if (!vcpu->arch.icp) {
 628                                 r = -ENXIO;
 629                                 break;
 630                         }
 631                         val = get_reg_val(reg->id, kvmppc_xics_get_icp(vcpu));
 632                         break;
 633 #endif /* CONFIG_KVM_XICS */
 634                 case KVM_REG_PPC_FSCR:
 635                         val = get_reg_val(reg->id, vcpu->arch.fscr);
 636                         break;
 637                 case KVM_REG_PPC_TAR:
 638                         val = get_reg_val(reg->id, vcpu->arch.tar);
 639                         break;
 640                 case KVM_REG_PPC_EBBHR:
 641                         val = get_reg_val(reg->id, vcpu->arch.ebbhr);
 642                         break;
 643                 case KVM_REG_PPC_EBBRR:
 644                         val = get_reg_val(reg->id, vcpu->arch.ebbrr);
 645                         break;
 646                 case KVM_REG_PPC_BESCR:
 647                         val = get_reg_val(reg->id, vcpu->arch.bescr);
 648                         break;
 649                 default:
 650                         r = -EINVAL;
 651                         break;
 652                 }
 653         }
 654         if (r)
 655                 return r;
 656
 657         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
 658                 r = -EFAULT;
 659
 660         return r;
 661 }
 662
 663 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 664 {
 665         int r;
 666         union kvmppc_one_reg val;
 667         int size;
 668         long int i;
 669
 670         size = one_reg_size(reg->id);
 671         if (size > sizeof(val))
 672                 return -EINVAL;
 673
 674         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
 675                 return -EFAULT;
 676
 677         r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, reg->id, &val);
 678         if (r == -EINVAL) {
 679                 r = 0;
 680                 switch (reg->id) {
 681                 case KVM_REG_PPC_DAR:
 682                         kvmppc_set_dar(vcpu, set_reg_val(reg->id, val));
 683                         break;
 684                 case KVM_REG_PPC_DSISR:
 685                         kvmppc_set_dsisr(vcpu, set_reg_val(reg->id, val));
 686                         break;
 687                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 688                         i = reg->id - KVM_REG_PPC_FPR0;
 689                         VCPU_FPR(vcpu, i) = set_reg_val(reg->id, val);
 690                         break;
 691                 case KVM_REG_PPC_FPSCR:
 692                         vcpu->arch.fp.fpscr = set_reg_val(reg->id, val);
 693                         break;
 694 #ifdef CONFIG_ALTIVEC
 695                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
 696                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 697                                 r = -ENXIO;
 698                                 break;
 699                         }
 700                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
 701                         break;
 702                 case KVM_REG_PPC_VSCR:
 703                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 704                                 r = -ENXIO;
 705                                 break;
 706                         }
 707                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
 708                         break;
 709                 case KVM_REG_PPC_VRSAVE:
 710                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 711                                 r = -ENXIO;
 712                                 break;
 713                         }
 714                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
 715                         break;
 716 #endif /* CONFIG_ALTIVEC */
 717 #ifdef CONFIG_VSX
 718                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 719                         if (cpu_has_feature(CPU_FTR_VSX)) {
 720                                 long int i = reg->id - KVM_REG_PPC_VSR0;
 721                                 vcpu->arch.fp.fpr[i][0] = val.vsxval[0];
 722                                 vcpu->arch.fp.fpr[i][1] = val.vsxval[1];
 723                         } else {
 724                                 r = -ENXIO;
 725                         }
 726                         break;
 727 #endif /* CONFIG_VSX */
 728 #ifdef CONFIG_KVM_XICS
 729                 case KVM_REG_PPC_ICP_STATE:
 730                         if (!vcpu->arch.icp) {
 731                                 r = -ENXIO;
 732                                 break;
 733                         }
 734                         r = kvmppc_xics_set_icp(vcpu,
 735                                                 set_reg_val(reg->id, val));
 736                         break;
 737 #endif /* CONFIG_KVM_XICS */
 738                 case KVM_REG_PPC_FSCR:
 739                         vcpu->arch.fscr = set_reg_val(reg->id, val);
 740                         break;
 741                 case KVM_REG_PPC_TAR:
 742                         vcpu->arch.tar = set_reg_val(reg->id, val);
 743                         break;
 744                 case KVM_REG_PPC_EBBHR:
 745                         vcpu->arch.ebbhr = set_reg_val(reg->id, val);
 746                         break;
 747                 case KVM_REG_PPC_EBBRR:
 748                         vcpu->arch.ebbrr = set_reg_val(reg->id, val);
 749                         break;
 750                 case KVM_REG_PPC_BESCR:
 751                         vcpu->arch.bescr = set_reg_val(reg->id, val);
 752                         break;
 753                 default:
 754                         r = -EINVAL;
 755                         break;
 756                 }
 757         }
 758
 759         return r;
 760 }
 761
 762 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 763 {
 764         vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
 765 }
 766
 767 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
 768 {
 769         vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
 770 }
 771
 772 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 773 {
 774         vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
 775 }
 776 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
 777
 778 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 779 {
 780         return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
 781 }
 782
 783 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 784                                   struct kvm_translation *tr)
 785 {
 786         return 0;
 787 }
 788
 789 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 790                                         struct kvm_guest_debug *dbg)
 791 {
 792         return -EINVAL;
 793 }
 794
 795 void kvmppc_decrementer_func(unsigned long data)
 796 {
 797         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
 798
 799         kvmppc_core_queue_dec(vcpu);
 800         kvm_vcpu_kick(vcpu);
 801 }
 802
 803 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
 804 {
 805         return kvm->arch.kvm_ops->vcpu_create(kvm, id);
 806 }
 807
 808 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 809 {
 810         vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
 811 }
 812
 813 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 814 {
 815         return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
 816 }
 817
 818 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 819 {
 820         return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
 821 }
 822
 823 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 824                               struct kvm_memory_slot *dont)
 825 {
 826         kvm->arch.kvm_ops->free_memslot(free, dont);
 827 }
 828
 829 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 830                                unsigned long npages)
 831 {
 832         return kvm->arch.kvm_ops->create_memslot(slot, npages);
 833 }
 834
 835 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
 836 {
 837         kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
 838 }
 839
 840 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
 841                                 struct kvm_memory_slot *memslot,
 842                                 struct kvm_userspace_memory_region *mem)
 843 {
 844         return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
 845 }
 846
 847 void kvmppc_core_commit_memory_region(struct kvm *kvm,
 848                                 struct kvm_userspace_memory_region *mem,
 849                                 const struct kvm_memory_slot *old)
 850 {
 851         kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old);
 852 }
 853
 854 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
 855 {
 856         return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
 857 }
 858 EXPORT_SYMBOL_GPL(kvm_unmap_hva);
 859
 860 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
 861 {
 862         return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
 863 }
 864
 865 int kvm_age_hva(struct kvm *kvm, unsigned long hva)
 866 {
 867         return kvm->arch.kvm_ops->age_hva(kvm, hva);
 868 }
 869
 870 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
 871 {
 872         return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
 873 }
 874
 875 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 876 {
 877         kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
 878 }
 879
 880 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
 881 {
 882         vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
 883 }
 884
 885 int kvmppc_core_init_vm(struct kvm *kvm)
 886 {
 887
 888 #ifdef CONFIG_PPC64
 889         INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
 890         INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
 891 #endif
 892
 893         return kvm->arch.kvm_ops->init_vm(kvm);
 894 }
 895
 896 void kvmppc_core_destroy_vm(struct kvm *kvm)
 897 {
 898         kvm->arch.kvm_ops->destroy_vm(kvm);
 899
 900 #ifdef CONFIG_PPC64
 901         kvmppc_rtas_tokens_free(kvm);
 902         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
 903 #endif
 904 }
 905
 906 int kvmppc_core_check_processor_compat(void)
 907 {
 908         /*
 909          * We always return 0 for book3s. We check
 910          * for compatability while loading the HV
 911          * or PR module
 912          */
 913         return 0;
 914 }
 915
 916 static int kvmppc_book3s_init(void)
 917 {
 918         int r;
 919
 920         r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
 921         if (r)
 922                 return r;
 923 #ifdef CONFIG_KVM_BOOK3S_32
 924         r = kvmppc_book3s_init_pr();
 925 #endif
 926         return r;
 927
 928 }
 929
 930 static void kvmppc_book3s_exit(void)
 931 {
 932 #ifdef CONFIG_KVM_BOOK3S_32
 933         kvmppc_book3s_exit_pr();
 934 #endif
 935         kvm_exit();
 936 }
 937
 938 module_init(kvmppc_book3s_init);
 939 module_exit(kvmppc_book3s_exit);
 940
 941 /* On 32bit this is our one and only kernel module */
 942 #ifdef CONFIG_KVM_BOOK3S_32
 943 MODULE_ALIAS_MISCDEV(KVM_MINOR);
 944 MODULE_ALIAS("devname:kvm");
 945 #endif