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