kernel/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_successful_poll", VCPU_STAT(halt_successful_poll), },
  56         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  57         { "pf_storage",  VCPU_STAT(pf_storage) },
  58         { "sp_storage",  VCPU_STAT(sp_storage) },
  59         { "pf_instruc",  VCPU_STAT(pf_instruc) },
  60         { "sp_instruc",  VCPU_STAT(sp_instruc) },
  61         { "ld",          VCPU_STAT(ld) },
  62         { "ld_slow",     VCPU_STAT(ld_slow) },
  63         { "st",          VCPU_STAT(st) },
  64         { "st_slow",     VCPU_STAT(st_slow) },
  65         { NULL }
  66 };
  67
  68 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu)
  69 {
  70         if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) {
  71                 ulong pc = kvmppc_get_pc(vcpu);
  72                 if ((pc & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
  73                         kvmppc_set_pc(vcpu, pc & ~SPLIT_HACK_MASK);
  74                 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SPLIT_HACK;
  75         }
  76 }
  77 EXPORT_SYMBOL_GPL(kvmppc_unfixup_split_real);
  78
  79 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
  80 {
  81         if (!is_kvmppc_hv_enabled(vcpu->kvm))
  82                 return to_book3s(vcpu)->hior;
  83         return 0;
  84 }
  85
  86 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
  87                         unsigned long pending_now, unsigned long old_pending)
  88 {
  89         if (is_kvmppc_hv_enabled(vcpu->kvm))
  90                 return;
  91         if (pending_now)
  92                 kvmppc_set_int_pending(vcpu, 1);
  93         else if (old_pending)
  94                 kvmppc_set_int_pending(vcpu, 0);
  95 }
  96
  97 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
  98 {
  99         ulong crit_raw;
 100         ulong crit_r1;
 101         bool crit;
 102
 103         if (is_kvmppc_hv_enabled(vcpu->kvm))
 104                 return false;
 105
 106         crit_raw = kvmppc_get_critical(vcpu);
 107         crit_r1 = kvmppc_get_gpr(vcpu, 1);
 108
 109         /* Truncate crit indicators in 32 bit mode */
 110         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 111                 crit_raw &= 0xffffffff;
 112                 crit_r1 &= 0xffffffff;
 113         }
 114
 115         /* Critical section when crit == r1 */
 116         crit = (crit_raw == crit_r1);
 117         /* ... and we're in supervisor mode */
 118         crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
 119
 120         return crit;
 121 }
 122
 123 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
 124 {
 125         kvmppc_unfixup_split_real(vcpu);
 126         kvmppc_set_srr0(vcpu, kvmppc_get_pc(vcpu));
 127         kvmppc_set_srr1(vcpu, kvmppc_get_msr(vcpu) | flags);
 128         kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
 129         vcpu->arch.mmu.reset_msr(vcpu);
 130 }
 131
 132 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
 133 {
 134         unsigned int prio;
 135
 136         switch (vec) {
 137         case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;         break;
 138         case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;        break;
 139         case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;         break;
 140         case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;         break;
 141         case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;         break;
 142         case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;         break;
 143         case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;             break;
 144         case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL;       break;
 145         case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;            break;
 146         case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;              break;
 147         case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;           break;
 148         case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;          break;
 149         case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;              break;
 150         case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;                break;
 151         case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;              break;
 152         case 0xf40: prio = BOOK3S_IRQPRIO_VSX;                  break;
 153         case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL;          break;
 154         default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
 155         }
 156
 157         return prio;
 158 }
 159
 160 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 161                                           unsigned int vec)
 162 {
 163         unsigned long old_pending = vcpu->arch.pending_exceptions;
 164
 165         clear_bit(kvmppc_book3s_vec2irqprio(vec),
 166                   &vcpu->arch.pending_exceptions);
 167
 168         kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
 169                                   old_pending);
 170 }
 171
 172 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
 173 {
 174         vcpu->stat.queue_intr++;
 175
 176         set_bit(kvmppc_book3s_vec2irqprio(vec),
 177                 &vcpu->arch.pending_exceptions);
 178 #ifdef EXIT_DEBUG
 179         printk(KERN_INFO "Queueing interrupt %x\n", vec);
 180 #endif
 181 }
 182 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
 183
 184 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
 185 {
 186         /* might as well deliver this straight away */
 187         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
 188 }
 189 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
 190
 191 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 192 {
 193         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 194 }
 195 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
 196
 197 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 198 {
 199         return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 200 }
 201 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
 202
 203 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 204 {
 205         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 206 }
 207 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
 208
 209 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 210                                 struct kvm_interrupt *irq)
 211 {
 212         unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
 213
 214         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 215                 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
 216
 217         kvmppc_book3s_queue_irqprio(vcpu, vec);
 218 }
 219
 220 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 221 {
 222         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 223         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
 224 }
 225
 226 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
 227                                     ulong flags)
 228 {
 229         kvmppc_set_dar(vcpu, dar);
 230         kvmppc_set_dsisr(vcpu, flags);
 231         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE);
 232 }
 233
 234 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
 235 {
 236         u64 msr = kvmppc_get_msr(vcpu);
 237         msr &= ~(SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
 238         msr |= flags & (SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
 239         kvmppc_set_msr_fast(vcpu, msr);
 240         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
 241 }
 242
 243 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
 244 {
 245         int deliver = 1;
 246         int vec = 0;
 247         bool crit = kvmppc_critical_section(vcpu);
 248
 249         switch (priority) {
 250         case BOOK3S_IRQPRIO_DECREMENTER:
 251                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 252                 vec = BOOK3S_INTERRUPT_DECREMENTER;
 253                 break;
 254         case BOOK3S_IRQPRIO_EXTERNAL:
 255         case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 256                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 257                 vec = BOOK3S_INTERRUPT_EXTERNAL;
 258                 break;
 259         case BOOK3S_IRQPRIO_SYSTEM_RESET:
 260                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
 261                 break;
 262         case BOOK3S_IRQPRIO_MACHINE_CHECK:
 263                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
 264                 break;
 265         case BOOK3S_IRQPRIO_DATA_STORAGE:
 266                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
 267                 break;
 268         case BOOK3S_IRQPRIO_INST_STORAGE:
 269                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
 270                 break;
 271         case BOOK3S_IRQPRIO_DATA_SEGMENT:
 272                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
 273                 break;
 274         case BOOK3S_IRQPRIO_INST_SEGMENT:
 275                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
 276                 break;
 277         case BOOK3S_IRQPRIO_ALIGNMENT:
 278                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
 279                 break;
 280         case BOOK3S_IRQPRIO_PROGRAM:
 281                 vec = BOOK3S_INTERRUPT_PROGRAM;
 282                 break;
 283         case BOOK3S_IRQPRIO_VSX:
 284                 vec = BOOK3S_INTERRUPT_VSX;
 285                 break;
 286         case BOOK3S_IRQPRIO_ALTIVEC:
 287                 vec = BOOK3S_INTERRUPT_ALTIVEC;
 288                 break;
 289         case BOOK3S_IRQPRIO_FP_UNAVAIL:
 290                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
 291                 break;
 292         case BOOK3S_IRQPRIO_SYSCALL:
 293                 vec = BOOK3S_INTERRUPT_SYSCALL;
 294                 break;
 295         case BOOK3S_IRQPRIO_DEBUG:
 296                 vec = BOOK3S_INTERRUPT_TRACE;
 297                 break;
 298         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
 299                 vec = BOOK3S_INTERRUPT_PERFMON;
 300                 break;
 301         case BOOK3S_IRQPRIO_FAC_UNAVAIL:
 302                 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
 303                 break;
 304         default:
 305                 deliver = 0;
 306                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
 307                 break;
 308         }
 309
 310 #if 0
 311         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
 312 #endif
 313
 314         if (deliver)
 315                 kvmppc_inject_interrupt(vcpu, vec, 0);
 316
 317         return deliver;
 318 }
 319
 320 /*
 321  * This function determines if an irqprio should be cleared once issued.
 322  */
 323 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
 324 {
 325         switch (priority) {
 326                 case BOOK3S_IRQPRIO_DECREMENTER:
 327                         /* DEC interrupts get cleared by mtdec */
 328                         return false;
 329                 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 330                         /* External interrupts get cleared by userspace */
 331                         return false;
 332         }
 333
 334         return true;
 335 }
 336
 337 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 338 {
 339         unsigned long *pending = &vcpu->arch.pending_exceptions;
 340         unsigned long old_pending = vcpu->arch.pending_exceptions;
 341         unsigned int priority;
 342
 343 #ifdef EXIT_DEBUG
 344         if (vcpu->arch.pending_exceptions)
 345                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
 346 #endif
 347         priority = __ffs(*pending);
 348         while (priority < BOOK3S_IRQPRIO_MAX) {
 349                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
 350                     clear_irqprio(vcpu, priority)) {
 351                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 352                         break;
 353                 }
 354
 355                 priority = find_next_bit(pending,
 356                                          BITS_PER_BYTE * sizeof(*pending),
 357                                          priority + 1);
 358         }
 359
 360         /* Tell the guest about our interrupt status */
 361         kvmppc_update_int_pending(vcpu, *pending, old_pending);
 362
 363         return 0;
 364 }
 365 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
 366
 367 pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
 368                         bool *writable)
 369 {
 370         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
 371         gfn_t gfn = gpa >> PAGE_SHIFT;
 372
 373         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 374                 mp_pa = (uint32_t)mp_pa;
 375
 376         /* Magic page override */
 377         gpa &= ~0xFFFULL;
 378         if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
 379                 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
 380                 pfn_t pfn;
 381
 382                 pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
 383                 get_page(pfn_to_page(pfn));
 384                 if (writable)
 385                         *writable = true;
 386                 return pfn;
 387         }
 388
 389         return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
 390 }
 391 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
 392
 393 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
 394                  enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
 395 {
 396         bool data = (xlid == XLATE_DATA);
 397         bool iswrite = (xlrw == XLATE_WRITE);
 398         int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
 399         int r;
 400
 401         if (relocated) {
 402                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
 403         } else {
 404                 pte->eaddr = eaddr;
 405                 pte->raddr = eaddr & KVM_PAM;
 406                 pte->vpage = VSID_REAL | eaddr >> 12;
 407                 pte->may_read = true;
 408                 pte->may_write = true;
 409                 pte->may_execute = true;
 410                 r = 0;
 411
 412                 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
 413                     !data) {
 414                         if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
 415                             ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
 416                         pte->raddr &= ~SPLIT_HACK_MASK;
 417                 }
 418         }
 419
 420         return r;
 421 }
 422
 423 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, enum instruction_type type,
 424                                          u32 *inst)
 425 {
 426         ulong pc = kvmppc_get_pc(vcpu);
 427         int r;
 428
 429         if (type == INST_SC)
 430                 pc -= 4;
 431
 432         r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
 433         if (r == EMULATE_DONE)
 434                 return r;
 435         else
 436                 return EMULATE_AGAIN;
 437 }
 438 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
 439
 440 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 441 {
 442         return 0;
 443 }
 444
 445 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
 446 {
 447         return 0;
 448 }
 449
 450 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
 451 {
 452 }
 453
 454 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 455                                   struct kvm_sregs *sregs)
 456 {
 457         return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
 458 }
 459
 460 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 461                                   struct kvm_sregs *sregs)
 462 {
 463         return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
 464 }
 465
 466 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 467 {
 468         int i;
 469
 470         regs->pc = kvmppc_get_pc(vcpu);
 471         regs->cr = kvmppc_get_cr(vcpu);
 472         regs->ctr = kvmppc_get_ctr(vcpu);
 473         regs->lr = kvmppc_get_lr(vcpu);
 474         regs->xer = kvmppc_get_xer(vcpu);
 475         regs->msr = kvmppc_get_msr(vcpu);
 476         regs->srr0 = kvmppc_get_srr0(vcpu);
 477         regs->srr1 = kvmppc_get_srr1(vcpu);
 478         regs->pid = vcpu->arch.pid;
 479         regs->sprg0 = kvmppc_get_sprg0(vcpu);
 480         regs->sprg1 = kvmppc_get_sprg1(vcpu);
 481         regs->sprg2 = kvmppc_get_sprg2(vcpu);
 482         regs->sprg3 = kvmppc_get_sprg3(vcpu);
 483         regs->sprg4 = kvmppc_get_sprg4(vcpu);
 484         regs->sprg5 = kvmppc_get_sprg5(vcpu);
 485         regs->sprg6 = kvmppc_get_sprg6(vcpu);
 486         regs->sprg7 = kvmppc_get_sprg7(vcpu);
 487
 488         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 489                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 490
 491         return 0;
 492 }
 493
 494 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 495 {
 496         int i;
 497
 498         kvmppc_set_pc(vcpu, regs->pc);
 499         kvmppc_set_cr(vcpu, regs->cr);
 500         kvmppc_set_ctr(vcpu, regs->ctr);
 501         kvmppc_set_lr(vcpu, regs->lr);
 502         kvmppc_set_xer(vcpu, regs->xer);
 503         kvmppc_set_msr(vcpu, regs->msr);
 504         kvmppc_set_srr0(vcpu, regs->srr0);
 505         kvmppc_set_srr1(vcpu, regs->srr1);
 506         kvmppc_set_sprg0(vcpu, regs->sprg0);
 507         kvmppc_set_sprg1(vcpu, regs->sprg1);
 508         kvmppc_set_sprg2(vcpu, regs->sprg2);
 509         kvmppc_set_sprg3(vcpu, regs->sprg3);
 510         kvmppc_set_sprg4(vcpu, regs->sprg4);
 511         kvmppc_set_sprg5(vcpu, regs->sprg5);
 512         kvmppc_set_sprg6(vcpu, regs->sprg6);
 513         kvmppc_set_sprg7(vcpu, regs->sprg7);
 514
 515         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 516                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 517
 518         return 0;
 519 }
 520
 521 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 522 {
 523         return -ENOTSUPP;
 524 }
 525
 526 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 527 {
 528         return -ENOTSUPP;
 529 }
 530
 531 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
 532                         union kvmppc_one_reg *val)
 533 {
 534         int r = 0;
 535         long int i;
 536
 537         r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
 538         if (r == -EINVAL) {
 539                 r = 0;
 540                 switch (id) {
 541                 case KVM_REG_PPC_DAR:
 542                         *val = get_reg_val(id, kvmppc_get_dar(vcpu));
 543                         break;
 544                 case KVM_REG_PPC_DSISR:
 545                         *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
 546                         break;
 547                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 548                         i = id - KVM_REG_PPC_FPR0;
 549                         *val = get_reg_val(id, VCPU_FPR(vcpu, i));
 550                         break;
 551                 case KVM_REG_PPC_FPSCR:
 552                         *val = get_reg_val(id, vcpu->arch.fp.fpscr);
 553                         break;
 554 #ifdef CONFIG_VSX
 555                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 556                         if (cpu_has_feature(CPU_FTR_VSX)) {
 557                                 i = id - KVM_REG_PPC_VSR0;
 558                                 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
 559                                 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
 560                         } else {
 561                                 r = -ENXIO;
 562                         }
 563                         break;
 564 #endif /* CONFIG_VSX */
 565                 case KVM_REG_PPC_DEBUG_INST:
 566                         *val = get_reg_val(id, INS_TW);
 567                         break;
 568 #ifdef CONFIG_KVM_XICS
 569                 case KVM_REG_PPC_ICP_STATE:
 570                         if (!vcpu->arch.icp) {
 571                                 r = -ENXIO;
 572                                 break;
 573                         }
 574                         *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
 575                         break;
 576 #endif /* CONFIG_KVM_XICS */
 577                 case KVM_REG_PPC_FSCR:
 578                         *val = get_reg_val(id, vcpu->arch.fscr);
 579                         break;
 580                 case KVM_REG_PPC_TAR:
 581                         *val = get_reg_val(id, vcpu->arch.tar);
 582                         break;
 583                 case KVM_REG_PPC_EBBHR:
 584                         *val = get_reg_val(id, vcpu->arch.ebbhr);
 585                         break;
 586                 case KVM_REG_PPC_EBBRR:
 587                         *val = get_reg_val(id, vcpu->arch.ebbrr);
 588                         break;
 589                 case KVM_REG_PPC_BESCR:
 590                         *val = get_reg_val(id, vcpu->arch.bescr);
 591                         break;
 592                 case KVM_REG_PPC_VTB:
 593                         *val = get_reg_val(id, vcpu->arch.vtb);
 594                         break;
 595                 case KVM_REG_PPC_IC:
 596                         *val = get_reg_val(id, vcpu->arch.ic);
 597                         break;
 598                 default:
 599                         r = -EINVAL;
 600                         break;
 601                 }
 602         }
 603
 604         return r;
 605 }
 606
 607 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
 608                         union kvmppc_one_reg *val)
 609 {
 610         int r = 0;
 611         long int i;
 612
 613         r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
 614         if (r == -EINVAL) {
 615                 r = 0;
 616                 switch (id) {
 617                 case KVM_REG_PPC_DAR:
 618                         kvmppc_set_dar(vcpu, set_reg_val(id, *val));
 619                         break;
 620                 case KVM_REG_PPC_DSISR:
 621                         kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
 622                         break;
 623                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 624                         i = id - KVM_REG_PPC_FPR0;
 625                         VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
 626                         break;
 627                 case KVM_REG_PPC_FPSCR:
 628                         vcpu->arch.fp.fpscr = set_reg_val(id, *val);
 629                         break;
 630 #ifdef CONFIG_VSX
 631                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 632                         if (cpu_has_feature(CPU_FTR_VSX)) {
 633                                 i = id - KVM_REG_PPC_VSR0;
 634                                 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
 635                                 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
 636                         } else {
 637                                 r = -ENXIO;
 638                         }
 639                         break;
 640 #endif /* CONFIG_VSX */
 641 #ifdef CONFIG_KVM_XICS
 642                 case KVM_REG_PPC_ICP_STATE:
 643                         if (!vcpu->arch.icp) {
 644                                 r = -ENXIO;
 645                                 break;
 646                         }
 647                         r = kvmppc_xics_set_icp(vcpu,
 648                                                 set_reg_val(id, *val));
 649                         break;
 650 #endif /* CONFIG_KVM_XICS */
 651                 case KVM_REG_PPC_FSCR:
 652                         vcpu->arch.fscr = set_reg_val(id, *val);
 653                         break;
 654                 case KVM_REG_PPC_TAR:
 655                         vcpu->arch.tar = set_reg_val(id, *val);
 656                         break;
 657                 case KVM_REG_PPC_EBBHR:
 658                         vcpu->arch.ebbhr = set_reg_val(id, *val);
 659                         break;
 660                 case KVM_REG_PPC_EBBRR:
 661                         vcpu->arch.ebbrr = set_reg_val(id, *val);
 662                         break;
 663                 case KVM_REG_PPC_BESCR:
 664                         vcpu->arch.bescr = set_reg_val(id, *val);
 665                         break;
 666                 case KVM_REG_PPC_VTB:
 667                         vcpu->arch.vtb = set_reg_val(id, *val);
 668                         break;
 669                 case KVM_REG_PPC_IC:
 670                         vcpu->arch.ic = set_reg_val(id, *val);
 671                         break;
 672                 default:
 673                         r = -EINVAL;
 674                         break;
 675                 }
 676         }
 677
 678         return r;
 679 }
 680
 681 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 682 {
 683         vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
 684 }
 685
 686 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
 687 {
 688         vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
 689 }
 690
 691 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 692 {
 693         vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
 694 }
 695 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
 696
 697 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 698 {
 699         return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
 700 }
 701
 702 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 703                                   struct kvm_translation *tr)
 704 {
 705         return 0;
 706 }
 707
 708 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 709                                         struct kvm_guest_debug *dbg)
 710 {
 711         vcpu->guest_debug = dbg->control;
 712         return 0;
 713 }
 714
 715 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
 716 {
 717         kvmppc_core_queue_dec(vcpu);
 718         kvm_vcpu_kick(vcpu);
 719 }
 720
 721 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
 722 {
 723         return kvm->arch.kvm_ops->vcpu_create(kvm, id);
 724 }
 725
 726 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 727 {
 728         vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
 729 }
 730
 731 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 732 {
 733         return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
 734 }
 735
 736 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 737 {
 738         return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
 739 }
 740
 741 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 742                               struct kvm_memory_slot *dont)
 743 {
 744         kvm->arch.kvm_ops->free_memslot(free, dont);
 745 }
 746
 747 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 748                                unsigned long npages)
 749 {
 750         return kvm->arch.kvm_ops->create_memslot(slot, npages);
 751 }
 752
 753 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
 754 {
 755         kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
 756 }
 757
 758 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
 759                                 struct kvm_memory_slot *memslot,
 760                                 struct kvm_userspace_memory_region *mem)
 761 {
 762         return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
 763 }
 764
 765 void kvmppc_core_commit_memory_region(struct kvm *kvm,
 766                                 struct kvm_userspace_memory_region *mem,
 767                                 const struct kvm_memory_slot *old)
 768 {
 769         kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old);
 770 }
 771
 772 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
 773 {
 774         return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
 775 }
 776 EXPORT_SYMBOL_GPL(kvm_unmap_hva);
 777
 778 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
 779 {
 780         return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
 781 }
 782
 783 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
 784 {
 785         return kvm->arch.kvm_ops->age_hva(kvm, start, end);
 786 }
 787
 788 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
 789 {
 790         return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
 791 }
 792
 793 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 794 {
 795         kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
 796 }
 797
 798 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
 799 {
 800         vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
 801 }
 802
 803 int kvmppc_core_init_vm(struct kvm *kvm)
 804 {
 805
 806 #ifdef CONFIG_PPC64
 807         INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
 808         INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
 809 #endif
 810
 811         return kvm->arch.kvm_ops->init_vm(kvm);
 812 }
 813
 814 void kvmppc_core_destroy_vm(struct kvm *kvm)
 815 {
 816         kvm->arch.kvm_ops->destroy_vm(kvm);
 817
 818 #ifdef CONFIG_PPC64
 819         kvmppc_rtas_tokens_free(kvm);
 820         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
 821 #endif
 822 }
 823
 824 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
 825 {
 826         unsigned long size = kvmppc_get_gpr(vcpu, 4);
 827         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 828         u64 buf;
 829         int ret;
 830
 831         if (!is_power_of_2(size) || (size > sizeof(buf)))
 832                 return H_TOO_HARD;
 833
 834         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 835         if (ret != 0)
 836                 return H_TOO_HARD;
 837
 838         switch (size) {
 839         case 1:
 840                 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
 841                 break;
 842
 843         case 2:
 844                 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
 845                 break;
 846
 847         case 4:
 848                 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
 849                 break;
 850
 851         case 8:
 852                 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
 853                 break;
 854
 855         default:
 856                 BUG();
 857         }
 858
 859         return H_SUCCESS;
 860 }
 861 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
 862
 863 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
 864 {
 865         unsigned long size = kvmppc_get_gpr(vcpu, 4);
 866         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 867         unsigned long val = kvmppc_get_gpr(vcpu, 6);
 868         u64 buf;
 869         int ret;
 870
 871         switch (size) {
 872         case 1:
 873                 *(u8 *)&buf = val;
 874                 break;
 875
 876         case 2:
 877                 *(__be16 *)&buf = cpu_to_be16(val);
 878                 break;
 879
 880         case 4:
 881                 *(__be32 *)&buf = cpu_to_be32(val);
 882                 break;
 883
 884         case 8:
 885                 *(__be64 *)&buf = cpu_to_be64(val);
 886                 break;
 887
 888         default:
 889                 return H_TOO_HARD;
 890         }
 891
 892         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 893         if (ret != 0)
 894                 return H_TOO_HARD;
 895
 896         return H_SUCCESS;
 897 }
 898 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
 899
 900 int kvmppc_core_check_processor_compat(void)
 901 {
 902         /*
 903          * We always return 0 for book3s. We check
 904          * for compatability while loading the HV
 905          * or PR module
 906          */
 907         return 0;
 908 }
 909
 910 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
 911 {
 912         return kvm->arch.kvm_ops->hcall_implemented(hcall);
 913 }
 914
 915 static int kvmppc_book3s_init(void)
 916 {
 917         int r;
 918
 919         r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
 920         if (r)
 921                 return r;
 922 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 923         r = kvmppc_book3s_init_pr();
 924 #endif
 925         return r;
 926
 927 }
 928
 929 static void kvmppc_book3s_exit(void)
 930 {
 931 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 932         kvmppc_book3s_exit_pr();
 933 #endif
 934         kvm_exit();
 935 }
 936
 937 module_init(kvmppc_book3s_init);
 938 module_exit(kvmppc_book3s_exit);
 939
 940 /* On 32bit this is our one and only kernel module */
 941 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 942 MODULE_ALIAS_MISCDEV(KVM_MINOR);
 943 MODULE_ALIAS("devname:kvm");
 944 #endif