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 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
  73 {
  74         vcpu->arch.shared->srr0 = kvmppc_get_pc(vcpu);
  75         vcpu->arch.shared->srr1 = vcpu->arch.shared->msr | flags;
  76         kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
  77         vcpu->arch.mmu.reset_msr(vcpu);
  78 }
  79
  80 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
  81 {
  82         unsigned int prio;
  83
  84         switch (vec) {
  85         case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;         break;
  86         case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;        break;
  87         case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;         break;
  88         case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;         break;
  89         case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;         break;
  90         case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;         break;
  91         case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;             break;
  92         case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL;       break;
  93         case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;            break;
  94         case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;              break;
  95         case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;           break;
  96         case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;          break;
  97         case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;              break;
  98         case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;                break;
  99         case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;              break;
 100         case 0xf40: prio = BOOK3S_IRQPRIO_VSX;                  break;
 101         default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
 102         }
 103
 104         return prio;
 105 }
 106
 107 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 108                                           unsigned int vec)
 109 {
 110         unsigned long old_pending = vcpu->arch.pending_exceptions;
 111
 112         clear_bit(kvmppc_book3s_vec2irqprio(vec),
 113                   &vcpu->arch.pending_exceptions);
 114
 115         kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
 116                                   old_pending);
 117 }
 118
 119 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
 120 {
 121         vcpu->stat.queue_intr++;
 122
 123         set_bit(kvmppc_book3s_vec2irqprio(vec),
 124                 &vcpu->arch.pending_exceptions);
 125 #ifdef EXIT_DEBUG
 126         printk(KERN_INFO "Queueing interrupt %x\n", vec);
 127 #endif
 128 }
 129
 130
 131 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
 132 {
 133         /* might as well deliver this straight away */
 134         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
 135 }
 136
 137 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 138 {
 139         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 140 }
 141
 142 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 143 {
 144         return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 145 }
 146
 147 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 148 {
 149         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 150 }
 151
 152 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 153                                 struct kvm_interrupt *irq)
 154 {
 155         unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
 156
 157         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 158                 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
 159
 160         kvmppc_book3s_queue_irqprio(vcpu, vec);
 161 }
 162
 163 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 164 {
 165         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 166         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
 167 }
 168
 169 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
 170 {
 171         int deliver = 1;
 172         int vec = 0;
 173         bool crit = kvmppc_critical_section(vcpu);
 174
 175         switch (priority) {
 176         case BOOK3S_IRQPRIO_DECREMENTER:
 177                 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
 178                 vec = BOOK3S_INTERRUPT_DECREMENTER;
 179                 break;
 180         case BOOK3S_IRQPRIO_EXTERNAL:
 181         case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 182                 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
 183                 vec = BOOK3S_INTERRUPT_EXTERNAL;
 184                 break;
 185         case BOOK3S_IRQPRIO_SYSTEM_RESET:
 186                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
 187                 break;
 188         case BOOK3S_IRQPRIO_MACHINE_CHECK:
 189                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
 190                 break;
 191         case BOOK3S_IRQPRIO_DATA_STORAGE:
 192                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
 193                 break;
 194         case BOOK3S_IRQPRIO_INST_STORAGE:
 195                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
 196                 break;
 197         case BOOK3S_IRQPRIO_DATA_SEGMENT:
 198                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
 199                 break;
 200         case BOOK3S_IRQPRIO_INST_SEGMENT:
 201                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
 202                 break;
 203         case BOOK3S_IRQPRIO_ALIGNMENT:
 204                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
 205                 break;
 206         case BOOK3S_IRQPRIO_PROGRAM:
 207                 vec = BOOK3S_INTERRUPT_PROGRAM;
 208                 break;
 209         case BOOK3S_IRQPRIO_VSX:
 210                 vec = BOOK3S_INTERRUPT_VSX;
 211                 break;
 212         case BOOK3S_IRQPRIO_ALTIVEC:
 213                 vec = BOOK3S_INTERRUPT_ALTIVEC;
 214                 break;
 215         case BOOK3S_IRQPRIO_FP_UNAVAIL:
 216                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
 217                 break;
 218         case BOOK3S_IRQPRIO_SYSCALL:
 219                 vec = BOOK3S_INTERRUPT_SYSCALL;
 220                 break;
 221         case BOOK3S_IRQPRIO_DEBUG:
 222                 vec = BOOK3S_INTERRUPT_TRACE;
 223                 break;
 224         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
 225                 vec = BOOK3S_INTERRUPT_PERFMON;
 226                 break;
 227         default:
 228                 deliver = 0;
 229                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
 230                 break;
 231         }
 232
 233 #if 0
 234         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
 235 #endif
 236
 237         if (deliver)
 238                 kvmppc_inject_interrupt(vcpu, vec, 0);
 239
 240         return deliver;
 241 }
 242
 243 /*
 244  * This function determines if an irqprio should be cleared once issued.
 245  */
 246 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
 247 {
 248         switch (priority) {
 249                 case BOOK3S_IRQPRIO_DECREMENTER:
 250                         /* DEC interrupts get cleared by mtdec */
 251                         return false;
 252                 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 253                         /* External interrupts get cleared by userspace */
 254                         return false;
 255         }
 256
 257         return true;
 258 }
 259
 260 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 261 {
 262         unsigned long *pending = &vcpu->arch.pending_exceptions;
 263         unsigned long old_pending = vcpu->arch.pending_exceptions;
 264         unsigned int priority;
 265
 266 #ifdef EXIT_DEBUG
 267         if (vcpu->arch.pending_exceptions)
 268                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
 269 #endif
 270         priority = __ffs(*pending);
 271         while (priority < BOOK3S_IRQPRIO_MAX) {
 272                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
 273                     clear_irqprio(vcpu, priority)) {
 274                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 275                         break;
 276                 }
 277
 278                 priority = find_next_bit(pending,
 279                                          BITS_PER_BYTE * sizeof(*pending),
 280                                          priority + 1);
 281         }
 282
 283         /* Tell the guest about our interrupt status */
 284         kvmppc_update_int_pending(vcpu, *pending, old_pending);
 285
 286         return 0;
 287 }
 288
 289 pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn)
 290 {
 291         ulong mp_pa = vcpu->arch.magic_page_pa;
 292
 293         if (!(vcpu->arch.shared->msr & MSR_SF))
 294                 mp_pa = (uint32_t)mp_pa;
 295
 296         /* Magic page override */
 297         if (unlikely(mp_pa) &&
 298             unlikely(((gfn << PAGE_SHIFT) & KVM_PAM) ==
 299                      ((mp_pa & PAGE_MASK) & KVM_PAM))) {
 300                 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
 301                 pfn_t pfn;
 302
 303                 pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
 304                 get_page(pfn_to_page(pfn));
 305                 return pfn;
 306         }
 307
 308         return gfn_to_pfn(vcpu->kvm, gfn);
 309 }
 310
 311 static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
 312                          struct kvmppc_pte *pte)
 313 {
 314         int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR));
 315         int r;
 316
 317         if (relocated) {
 318                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data);
 319         } else {
 320                 pte->eaddr = eaddr;
 321                 pte->raddr = eaddr & KVM_PAM;
 322                 pte->vpage = VSID_REAL | eaddr >> 12;
 323                 pte->may_read = true;
 324                 pte->may_write = true;
 325                 pte->may_execute = true;
 326                 r = 0;
 327         }
 328
 329         return r;
 330 }
 331
 332 static hva_t kvmppc_bad_hva(void)
 333 {
 334         return PAGE_OFFSET;
 335 }
 336
 337 static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
 338                                bool read)
 339 {
 340         hva_t hpage;
 341
 342         if (read && !pte->may_read)
 343                 goto err;
 344
 345         if (!read && !pte->may_write)
 346                 goto err;
 347
 348         hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
 349         if (kvm_is_error_hva(hpage))
 350                 goto err;
 351
 352         return hpage | (pte->raddr & ~PAGE_MASK);
 353 err:
 354         return kvmppc_bad_hva();
 355 }
 356
 357 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 358               bool data)
 359 {
 360         struct kvmppc_pte pte;
 361
 362         vcpu->stat.st++;
 363
 364         if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
 365                 return -ENOENT;
 366
 367         *eaddr = pte.raddr;
 368
 369         if (!pte.may_write)
 370                 return -EPERM;
 371
 372         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 373                 return EMULATE_DO_MMIO;
 374
 375         return EMULATE_DONE;
 376 }
 377
 378 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 379                       bool data)
 380 {
 381         struct kvmppc_pte pte;
 382         hva_t hva = *eaddr;
 383
 384         vcpu->stat.ld++;
 385
 386         if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
 387                 goto nopte;
 388
 389         *eaddr = pte.raddr;
 390
 391         hva = kvmppc_pte_to_hva(vcpu, &pte, true);
 392         if (kvm_is_error_hva(hva))
 393                 goto mmio;
 394
 395         if (copy_from_user(ptr, (void __user *)hva, size)) {
 396                 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
 397                 goto mmio;
 398         }
 399
 400         return EMULATE_DONE;
 401
 402 nopte:
 403         return -ENOENT;
 404 mmio:
 405         return EMULATE_DO_MMIO;
 406 }
 407
 408 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 409 {
 410         return 0;
 411 }
 412
 413 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
 414 {
 415         return 0;
 416 }
 417
 418 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
 419 {
 420 }
 421
 422 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 423 {
 424         int i;
 425
 426         regs->pc = kvmppc_get_pc(vcpu);
 427         regs->cr = kvmppc_get_cr(vcpu);
 428         regs->ctr = kvmppc_get_ctr(vcpu);
 429         regs->lr = kvmppc_get_lr(vcpu);
 430         regs->xer = kvmppc_get_xer(vcpu);
 431         regs->msr = vcpu->arch.shared->msr;
 432         regs->srr0 = vcpu->arch.shared->srr0;
 433         regs->srr1 = vcpu->arch.shared->srr1;
 434         regs->pid = vcpu->arch.pid;
 435         regs->sprg0 = vcpu->arch.shared->sprg0;
 436         regs->sprg1 = vcpu->arch.shared->sprg1;
 437         regs->sprg2 = vcpu->arch.shared->sprg2;
 438         regs->sprg3 = vcpu->arch.shared->sprg3;
 439         regs->sprg4 = vcpu->arch.shared->sprg4;
 440         regs->sprg5 = vcpu->arch.shared->sprg5;
 441         regs->sprg6 = vcpu->arch.shared->sprg6;
 442         regs->sprg7 = vcpu->arch.shared->sprg7;
 443
 444         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 445                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 446
 447         return 0;
 448 }
 449
 450 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 451 {
 452         int i;
 453
 454         kvmppc_set_pc(vcpu, regs->pc);
 455         kvmppc_set_cr(vcpu, regs->cr);
 456         kvmppc_set_ctr(vcpu, regs->ctr);
 457         kvmppc_set_lr(vcpu, regs->lr);
 458         kvmppc_set_xer(vcpu, regs->xer);
 459         kvmppc_set_msr(vcpu, regs->msr);
 460         vcpu->arch.shared->srr0 = regs->srr0;
 461         vcpu->arch.shared->srr1 = regs->srr1;
 462         vcpu->arch.shared->sprg0 = regs->sprg0;
 463         vcpu->arch.shared->sprg1 = regs->sprg1;
 464         vcpu->arch.shared->sprg2 = regs->sprg2;
 465         vcpu->arch.shared->sprg3 = regs->sprg3;
 466         vcpu->arch.shared->sprg4 = regs->sprg4;
 467         vcpu->arch.shared->sprg5 = regs->sprg5;
 468         vcpu->arch.shared->sprg6 = regs->sprg6;
 469         vcpu->arch.shared->sprg7 = regs->sprg7;
 470
 471         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 472                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 473
 474         return 0;
 475 }
 476
 477 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 478 {
 479         return -ENOTSUPP;
 480 }
 481
 482 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 483 {
 484         return -ENOTSUPP;
 485 }
 486
 487 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 488 {
 489         int r;
 490         union kvmppc_one_reg val;
 491         int size;
 492         long int i;
 493
 494         size = one_reg_size(reg->id);
 495         if (size > sizeof(val))
 496                 return -EINVAL;
 497
 498         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
 499
 500         if (r == -EINVAL) {
 501                 r = 0;
 502                 switch (reg->id) {
 503                 case KVM_REG_PPC_DAR:
 504                         val = get_reg_val(reg->id, vcpu->arch.shared->dar);
 505                         break;
 506                 case KVM_REG_PPC_DSISR:
 507                         val = get_reg_val(reg->id, vcpu->arch.shared->dsisr);
 508                         break;
 509                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 510                         i = reg->id - KVM_REG_PPC_FPR0;
 511                         val = get_reg_val(reg->id, vcpu->arch.fpr[i]);
 512                         break;
 513                 case KVM_REG_PPC_FPSCR:
 514                         val = get_reg_val(reg->id, vcpu->arch.fpscr);
 515                         break;
 516 #ifdef CONFIG_ALTIVEC
 517                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
 518                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 519                                 r = -ENXIO;
 520                                 break;
 521                         }
 522                         val.vval = vcpu->arch.vr[reg->id - KVM_REG_PPC_VR0];
 523                         break;
 524                 case KVM_REG_PPC_VSCR:
 525                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 526                                 r = -ENXIO;
 527                                 break;
 528                         }
 529                         val = get_reg_val(reg->id, vcpu->arch.vscr.u[3]);
 530                         break;
 531 #endif /* CONFIG_ALTIVEC */
 532                 case KVM_REG_PPC_DEBUG_INST: {
 533                         u32 opcode = INS_TW;
 534                         r = copy_to_user((u32 __user *)(long)reg->addr,
 535                                          &opcode, sizeof(u32));
 536                         break;
 537                 }
 538 #ifdef CONFIG_KVM_XICS
 539                 case KVM_REG_PPC_ICP_STATE:
 540                         if (!vcpu->arch.icp) {
 541                                 r = -ENXIO;
 542                                 break;
 543                         }
 544                         val = get_reg_val(reg->id, kvmppc_xics_get_icp(vcpu));
 545                         break;
 546 #endif /* CONFIG_KVM_XICS */
 547                 default:
 548                         r = -EINVAL;
 549                         break;
 550                 }
 551         }
 552         if (r)
 553                 return r;
 554
 555         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
 556                 r = -EFAULT;
 557
 558         return r;
 559 }
 560
 561 int kvm_vcpu_ioctl_set_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         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
 573                 return -EFAULT;
 574
 575         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
 576
 577         if (r == -EINVAL) {
 578                 r = 0;
 579                 switch (reg->id) {
 580                 case KVM_REG_PPC_DAR:
 581                         vcpu->arch.shared->dar = set_reg_val(reg->id, val);
 582                         break;
 583                 case KVM_REG_PPC_DSISR:
 584                         vcpu->arch.shared->dsisr = set_reg_val(reg->id, val);
 585                         break;
 586                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 587                         i = reg->id - KVM_REG_PPC_FPR0;
 588                         vcpu->arch.fpr[i] = set_reg_val(reg->id, val);
 589                         break;
 590                 case KVM_REG_PPC_FPSCR:
 591                         vcpu->arch.fpscr = set_reg_val(reg->id, val);
 592                         break;
 593 #ifdef CONFIG_ALTIVEC
 594                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
 595                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 596                                 r = -ENXIO;
 597                                 break;
 598                         }
 599                         vcpu->arch.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
 600                         break;
 601                 case KVM_REG_PPC_VSCR:
 602                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
 603                                 r = -ENXIO;
 604                                 break;
 605                         }
 606                         vcpu->arch.vscr.u[3] = set_reg_val(reg->id, val);
 607                         break;
 608 #endif /* CONFIG_ALTIVEC */
 609 #ifdef CONFIG_KVM_XICS
 610                 case KVM_REG_PPC_ICP_STATE:
 611                         if (!vcpu->arch.icp) {
 612                                 r = -ENXIO;
 613                                 break;
 614                         }
 615                         r = kvmppc_xics_set_icp(vcpu,
 616                                                 set_reg_val(reg->id, val));
 617                         break;
 618 #endif /* CONFIG_KVM_XICS */
 619                 default:
 620                         r = -EINVAL;
 621                         break;
 622                 }
 623         }
 624
 625         return r;
 626 }
 627
 628 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 629                                   struct kvm_translation *tr)
 630 {
 631         return 0;
 632 }
 633
 634 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 635                                         struct kvm_guest_debug *dbg)
 636 {
 637         return -EINVAL;
 638 }
 639
 640 void kvmppc_decrementer_func(unsigned long data)
 641 {
 642         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
 643
 644         kvmppc_core_queue_dec(vcpu);
 645         kvm_vcpu_kick(vcpu);
 646 }