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 #include <linux/gfp.h>
  24 #include <linux/sched.h>
  25 #include <linux/vmalloc.h>
  26 #include <linux/highmem.h>
  27
  28 #include <asm/reg.h>
  29 #include <asm/cputable.h>
  30 #include <asm/cacheflush.h>
  31 #include <asm/tlbflush.h>
  32 #include <linux/uaccess.h>
  33 #include <asm/io.h>
  34 #include <asm/kvm_ppc.h>
  35 #include <asm/kvm_book3s.h>
  36 #include <asm/mmu_context.h>
  37 #include <asm/page.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_poll_success_ns",       VCPU_STAT(halt_poll_success_ns) },
  56         { "halt_poll_fail_ns",          VCPU_STAT(halt_poll_fail_ns) },
  57         { "halt_wait_ns",               VCPU_STAT(halt_wait_ns) },
  58         { "halt_successful_poll", VCPU_STAT(halt_successful_poll), },
  59         { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll), },
  60         { "halt_successful_wait",       VCPU_STAT(halt_successful_wait) },
  61         { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
  62         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  63         { "pf_storage",  VCPU_STAT(pf_storage) },
  64         { "sp_storage",  VCPU_STAT(sp_storage) },
  65         { "pf_instruc",  VCPU_STAT(pf_instruc) },
  66         { "sp_instruc",  VCPU_STAT(sp_instruc) },
  67         { "ld",          VCPU_STAT(ld) },
  68         { "ld_slow",     VCPU_STAT(ld_slow) },
  69         { "st",          VCPU_STAT(st) },
  70         { "st_slow",     VCPU_STAT(st_slow) },
  71         { "pthru_all",       VCPU_STAT(pthru_all) },
  72         { "pthru_host",      VCPU_STAT(pthru_host) },
  73         { "pthru_bad_aff",   VCPU_STAT(pthru_bad_aff) },
  74         { NULL }
  75 };
  76
  77 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu)
  78 {
  79         if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) {
  80                 ulong pc = kvmppc_get_pc(vcpu);
  81                 if ((pc & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
  82                         kvmppc_set_pc(vcpu, pc & ~SPLIT_HACK_MASK);
  83                 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SPLIT_HACK;
  84         }
  85 }
  86 EXPORT_SYMBOL_GPL(kvmppc_unfixup_split_real);
  87
  88 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
  89 {
  90         if (!is_kvmppc_hv_enabled(vcpu->kvm))
  91                 return to_book3s(vcpu)->hior;
  92         return 0;
  93 }
  94
  95 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
  96                         unsigned long pending_now, unsigned long old_pending)
  97 {
  98         if (is_kvmppc_hv_enabled(vcpu->kvm))
  99                 return;
 100         if (pending_now)
 101                 kvmppc_set_int_pending(vcpu, 1);
 102         else if (old_pending)
 103                 kvmppc_set_int_pending(vcpu, 0);
 104 }
 105
 106 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
 107 {
 108         ulong crit_raw;
 109         ulong crit_r1;
 110         bool crit;
 111
 112         if (is_kvmppc_hv_enabled(vcpu->kvm))
 113                 return false;
 114
 115         crit_raw = kvmppc_get_critical(vcpu);
 116         crit_r1 = kvmppc_get_gpr(vcpu, 1);
 117
 118         /* Truncate crit indicators in 32 bit mode */
 119         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 120                 crit_raw &= 0xffffffff;
 121                 crit_r1 &= 0xffffffff;
 122         }
 123
 124         /* Critical section when crit == r1 */
 125         crit = (crit_raw == crit_r1);
 126         /* ... and we're in supervisor mode */
 127         crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
 128
 129         return crit;
 130 }
 131
 132 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
 133 {
 134         kvmppc_unfixup_split_real(vcpu);
 135         kvmppc_set_srr0(vcpu, kvmppc_get_pc(vcpu));
 136         kvmppc_set_srr1(vcpu, kvmppc_get_msr(vcpu) | flags);
 137         kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
 138         vcpu->arch.mmu.reset_msr(vcpu);
 139 }
 140
 141 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
 142 {
 143         unsigned int prio;
 144
 145         switch (vec) {
 146         case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;         break;
 147         case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;        break;
 148         case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;         break;
 149         case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;         break;
 150         case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;         break;
 151         case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;         break;
 152         case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;             break;
 153         case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL;       break;
 154         case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;            break;
 155         case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;              break;
 156         case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;           break;
 157         case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;          break;
 158         case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;              break;
 159         case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;                break;
 160         case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;              break;
 161         case 0xf40: prio = BOOK3S_IRQPRIO_VSX;                  break;
 162         case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL;          break;
 163         default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
 164         }
 165
 166         return prio;
 167 }
 168
 169 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 170                                           unsigned int vec)
 171 {
 172         unsigned long old_pending = vcpu->arch.pending_exceptions;
 173
 174         clear_bit(kvmppc_book3s_vec2irqprio(vec),
 175                   &vcpu->arch.pending_exceptions);
 176
 177         kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
 178                                   old_pending);
 179 }
 180
 181 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
 182 {
 183         vcpu->stat.queue_intr++;
 184
 185         set_bit(kvmppc_book3s_vec2irqprio(vec),
 186                 &vcpu->arch.pending_exceptions);
 187 #ifdef EXIT_DEBUG
 188         printk(KERN_INFO "Queueing interrupt %x\n", vec);
 189 #endif
 190 }
 191 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
 192
 193 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
 194 {
 195         /* might as well deliver this straight away */
 196         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
 197 }
 198 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
 199
 200 void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu)
 201 {
 202         /* might as well deliver this straight away */
 203         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, 0);
 204 }
 205
 206 void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu)
 207 {
 208         /* might as well deliver this straight away */
 209         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_ALTIVEC, 0);
 210 }
 211
 212 void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu)
 213 {
 214         /* might as well deliver this straight away */
 215         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_VSX, 0);
 216 }
 217
 218 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 219 {
 220         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 221 }
 222 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
 223
 224 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 225 {
 226         return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 227 }
 228 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
 229
 230 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 231 {
 232         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 233 }
 234 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
 235
 236 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 237                                 struct kvm_interrupt *irq)
 238 {
 239         unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
 240
 241         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 242                 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
 243
 244         kvmppc_book3s_queue_irqprio(vcpu, vec);
 245 }
 246
 247 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 248 {
 249         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 250         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
 251 }
 252
 253 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
 254                                     ulong flags)
 255 {
 256         kvmppc_set_dar(vcpu, dar);
 257         kvmppc_set_dsisr(vcpu, flags);
 258         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE);
 259 }
 260 EXPORT_SYMBOL_GPL(kvmppc_core_queue_data_storage);      /* used by kvm_hv */
 261
 262 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
 263 {
 264         u64 msr = kvmppc_get_msr(vcpu);
 265         msr &= ~(SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
 266         msr |= flags & (SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
 267         kvmppc_set_msr_fast(vcpu, msr);
 268         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
 269 }
 270
 271 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
 272                                          unsigned int priority)
 273 {
 274         int deliver = 1;
 275         int vec = 0;
 276         bool crit = kvmppc_critical_section(vcpu);
 277
 278         switch (priority) {
 279         case BOOK3S_IRQPRIO_DECREMENTER:
 280                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 281                 vec = BOOK3S_INTERRUPT_DECREMENTER;
 282                 break;
 283         case BOOK3S_IRQPRIO_EXTERNAL:
 284         case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 285                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 286                 vec = BOOK3S_INTERRUPT_EXTERNAL;
 287                 break;
 288         case BOOK3S_IRQPRIO_SYSTEM_RESET:
 289                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
 290                 break;
 291         case BOOK3S_IRQPRIO_MACHINE_CHECK:
 292                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
 293                 break;
 294         case BOOK3S_IRQPRIO_DATA_STORAGE:
 295                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
 296                 break;
 297         case BOOK3S_IRQPRIO_INST_STORAGE:
 298                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
 299                 break;
 300         case BOOK3S_IRQPRIO_DATA_SEGMENT:
 301                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
 302                 break;
 303         case BOOK3S_IRQPRIO_INST_SEGMENT:
 304                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
 305                 break;
 306         case BOOK3S_IRQPRIO_ALIGNMENT:
 307                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
 308                 break;
 309         case BOOK3S_IRQPRIO_PROGRAM:
 310                 vec = BOOK3S_INTERRUPT_PROGRAM;
 311                 break;
 312         case BOOK3S_IRQPRIO_VSX:
 313                 vec = BOOK3S_INTERRUPT_VSX;
 314                 break;
 315         case BOOK3S_IRQPRIO_ALTIVEC:
 316                 vec = BOOK3S_INTERRUPT_ALTIVEC;
 317                 break;
 318         case BOOK3S_IRQPRIO_FP_UNAVAIL:
 319                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
 320                 break;
 321         case BOOK3S_IRQPRIO_SYSCALL:
 322                 vec = BOOK3S_INTERRUPT_SYSCALL;
 323                 break;
 324         case BOOK3S_IRQPRIO_DEBUG:
 325                 vec = BOOK3S_INTERRUPT_TRACE;
 326                 break;
 327         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
 328                 vec = BOOK3S_INTERRUPT_PERFMON;
 329                 break;
 330         case BOOK3S_IRQPRIO_FAC_UNAVAIL:
 331                 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
 332                 break;
 333         default:
 334                 deliver = 0;
 335                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
 336                 break;
 337         }
 338
 339 #if 0
 340         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
 341 #endif
 342
 343         if (deliver)
 344                 kvmppc_inject_interrupt(vcpu, vec, 0);
 345
 346         return deliver;
 347 }
 348
 349 /*
 350  * This function determines if an irqprio should be cleared once issued.
 351  */
 352 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
 353 {
 354         switch (priority) {
 355                 case BOOK3S_IRQPRIO_DECREMENTER:
 356                         /* DEC interrupts get cleared by mtdec */
 357                         return false;
 358                 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 359                         /* External interrupts get cleared by userspace */
 360                         return false;
 361         }
 362
 363         return true;
 364 }
 365
 366 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 367 {
 368         unsigned long *pending = &vcpu->arch.pending_exceptions;
 369         unsigned long old_pending = vcpu->arch.pending_exceptions;
 370         unsigned int priority;
 371
 372 #ifdef EXIT_DEBUG
 373         if (vcpu->arch.pending_exceptions)
 374                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
 375 #endif
 376         priority = __ffs(*pending);
 377         while (priority < BOOK3S_IRQPRIO_MAX) {
 378                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
 379                     clear_irqprio(vcpu, priority)) {
 380                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 381                         break;
 382                 }
 383
 384                 priority = find_next_bit(pending,
 385                                          BITS_PER_BYTE * sizeof(*pending),
 386                                          priority + 1);
 387         }
 388
 389         /* Tell the guest about our interrupt status */
 390         kvmppc_update_int_pending(vcpu, *pending, old_pending);
 391
 392         return 0;
 393 }
 394 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
 395
 396 kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
 397                         bool *writable)
 398 {
 399         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
 400         gfn_t gfn = gpa >> PAGE_SHIFT;
 401
 402         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 403                 mp_pa = (uint32_t)mp_pa;
 404
 405         /* Magic page override */
 406         gpa &= ~0xFFFULL;
 407         if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
 408                 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
 409                 kvm_pfn_t pfn;
 410
 411                 pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
 412                 get_page(pfn_to_page(pfn));
 413                 if (writable)
 414                         *writable = true;
 415                 return pfn;
 416         }
 417
 418         return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
 419 }
 420 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
 421
 422 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
 423                  enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
 424 {
 425         bool data = (xlid == XLATE_DATA);
 426         bool iswrite = (xlrw == XLATE_WRITE);
 427         int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
 428         int r;
 429
 430         if (relocated) {
 431                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
 432         } else {
 433                 pte->eaddr = eaddr;
 434                 pte->raddr = eaddr & KVM_PAM;
 435                 pte->vpage = VSID_REAL | eaddr >> 12;
 436                 pte->may_read = true;
 437                 pte->may_write = true;
 438                 pte->may_execute = true;
 439                 r = 0;
 440
 441                 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
 442                     !data) {
 443                         if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
 444                             ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
 445                         pte->raddr &= ~SPLIT_HACK_MASK;
 446                 }
 447         }
 448
 449         return r;
 450 }
 451
 452 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, enum instruction_type type,
 453                                          u32 *inst)
 454 {
 455         ulong pc = kvmppc_get_pc(vcpu);
 456         int r;
 457
 458         if (type == INST_SC)
 459                 pc -= 4;
 460
 461         r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
 462         if (r == EMULATE_DONE)
 463                 return r;
 464         else
 465                 return EMULATE_AGAIN;
 466 }
 467 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
 468
 469 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 470 {
 471         return 0;
 472 }
 473
 474 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
 475 {
 476         return 0;
 477 }
 478
 479 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
 480 {
 481 }
 482
 483 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 484                                   struct kvm_sregs *sregs)
 485 {
 486         return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
 487 }
 488
 489 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 490                                   struct kvm_sregs *sregs)
 491 {
 492         return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
 493 }
 494
 495 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 496 {
 497         int i;
 498
 499         regs->pc = kvmppc_get_pc(vcpu);
 500         regs->cr = kvmppc_get_cr(vcpu);
 501         regs->ctr = kvmppc_get_ctr(vcpu);
 502         regs->lr = kvmppc_get_lr(vcpu);
 503         regs->xer = kvmppc_get_xer(vcpu);
 504         regs->msr = kvmppc_get_msr(vcpu);
 505         regs->srr0 = kvmppc_get_srr0(vcpu);
 506         regs->srr1 = kvmppc_get_srr1(vcpu);
 507         regs->pid = vcpu->arch.pid;
 508         regs->sprg0 = kvmppc_get_sprg0(vcpu);
 509         regs->sprg1 = kvmppc_get_sprg1(vcpu);
 510         regs->sprg2 = kvmppc_get_sprg2(vcpu);
 511         regs->sprg3 = kvmppc_get_sprg3(vcpu);
 512         regs->sprg4 = kvmppc_get_sprg4(vcpu);
 513         regs->sprg5 = kvmppc_get_sprg5(vcpu);
 514         regs->sprg6 = kvmppc_get_sprg6(vcpu);
 515         regs->sprg7 = kvmppc_get_sprg7(vcpu);
 516
 517         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 518                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 519
 520         return 0;
 521 }
 522
 523 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 524 {
 525         int i;
 526
 527         kvmppc_set_pc(vcpu, regs->pc);
 528         kvmppc_set_cr(vcpu, regs->cr);
 529         kvmppc_set_ctr(vcpu, regs->ctr);
 530         kvmppc_set_lr(vcpu, regs->lr);
 531         kvmppc_set_xer(vcpu, regs->xer);
 532         kvmppc_set_msr(vcpu, regs->msr);
 533         kvmppc_set_srr0(vcpu, regs->srr0);
 534         kvmppc_set_srr1(vcpu, regs->srr1);
 535         kvmppc_set_sprg0(vcpu, regs->sprg0);
 536         kvmppc_set_sprg1(vcpu, regs->sprg1);
 537         kvmppc_set_sprg2(vcpu, regs->sprg2);
 538         kvmppc_set_sprg3(vcpu, regs->sprg3);
 539         kvmppc_set_sprg4(vcpu, regs->sprg4);
 540         kvmppc_set_sprg5(vcpu, regs->sprg5);
 541         kvmppc_set_sprg6(vcpu, regs->sprg6);
 542         kvmppc_set_sprg7(vcpu, regs->sprg7);
 543
 544         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 545                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 546
 547         return 0;
 548 }
 549
 550 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 551 {
 552         return -ENOTSUPP;
 553 }
 554
 555 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 556 {
 557         return -ENOTSUPP;
 558 }
 559
 560 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
 561                         union kvmppc_one_reg *val)
 562 {
 563         int r = 0;
 564         long int i;
 565
 566         r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
 567         if (r == -EINVAL) {
 568                 r = 0;
 569                 switch (id) {
 570                 case KVM_REG_PPC_DAR:
 571                         *val = get_reg_val(id, kvmppc_get_dar(vcpu));
 572                         break;
 573                 case KVM_REG_PPC_DSISR:
 574                         *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
 575                         break;
 576                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 577                         i = id - KVM_REG_PPC_FPR0;
 578                         *val = get_reg_val(id, VCPU_FPR(vcpu, i));
 579                         break;
 580                 case KVM_REG_PPC_FPSCR:
 581                         *val = get_reg_val(id, vcpu->arch.fp.fpscr);
 582                         break;
 583 #ifdef CONFIG_VSX
 584                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 585                         if (cpu_has_feature(CPU_FTR_VSX)) {
 586                                 i = id - KVM_REG_PPC_VSR0;
 587                                 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
 588                                 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
 589                         } else {
 590                                 r = -ENXIO;
 591                         }
 592                         break;
 593 #endif /* CONFIG_VSX */
 594                 case KVM_REG_PPC_DEBUG_INST:
 595                         *val = get_reg_val(id, INS_TW);
 596                         break;
 597 #ifdef CONFIG_KVM_XICS
 598                 case KVM_REG_PPC_ICP_STATE:
 599                         if (!vcpu->arch.icp) {
 600                                 r = -ENXIO;
 601                                 break;
 602                         }
 603                         *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
 604                         break;
 605 #endif /* CONFIG_KVM_XICS */
 606                 case KVM_REG_PPC_FSCR:
 607                         *val = get_reg_val(id, vcpu->arch.fscr);
 608                         break;
 609                 case KVM_REG_PPC_TAR:
 610                         *val = get_reg_val(id, vcpu->arch.tar);
 611                         break;
 612                 case KVM_REG_PPC_EBBHR:
 613                         *val = get_reg_val(id, vcpu->arch.ebbhr);
 614                         break;
 615                 case KVM_REG_PPC_EBBRR:
 616                         *val = get_reg_val(id, vcpu->arch.ebbrr);
 617                         break;
 618                 case KVM_REG_PPC_BESCR:
 619                         *val = get_reg_val(id, vcpu->arch.bescr);
 620                         break;
 621                 case KVM_REG_PPC_IC:
 622                         *val = get_reg_val(id, vcpu->arch.ic);
 623                         break;
 624                 default:
 625                         r = -EINVAL;
 626                         break;
 627                 }
 628         }
 629
 630         return r;
 631 }
 632
 633 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
 634                         union kvmppc_one_reg *val)
 635 {
 636         int r = 0;
 637         long int i;
 638
 639         r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
 640         if (r == -EINVAL) {
 641                 r = 0;
 642                 switch (id) {
 643                 case KVM_REG_PPC_DAR:
 644                         kvmppc_set_dar(vcpu, set_reg_val(id, *val));
 645                         break;
 646                 case KVM_REG_PPC_DSISR:
 647                         kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
 648                         break;
 649                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 650                         i = id - KVM_REG_PPC_FPR0;
 651                         VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
 652                         break;
 653                 case KVM_REG_PPC_FPSCR:
 654                         vcpu->arch.fp.fpscr = set_reg_val(id, *val);
 655                         break;
 656 #ifdef CONFIG_VSX
 657                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 658                         if (cpu_has_feature(CPU_FTR_VSX)) {
 659                                 i = id - KVM_REG_PPC_VSR0;
 660                                 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
 661                                 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
 662                         } else {
 663                                 r = -ENXIO;
 664                         }
 665                         break;
 666 #endif /* CONFIG_VSX */
 667 #ifdef CONFIG_KVM_XICS
 668                 case KVM_REG_PPC_ICP_STATE:
 669                         if (!vcpu->arch.icp) {
 670                                 r = -ENXIO;
 671                                 break;
 672                         }
 673                         r = kvmppc_xics_set_icp(vcpu,
 674                                                 set_reg_val(id, *val));
 675                         break;
 676 #endif /* CONFIG_KVM_XICS */
 677                 case KVM_REG_PPC_FSCR:
 678                         vcpu->arch.fscr = set_reg_val(id, *val);
 679                         break;
 680                 case KVM_REG_PPC_TAR:
 681                         vcpu->arch.tar = set_reg_val(id, *val);
 682                         break;
 683                 case KVM_REG_PPC_EBBHR:
 684                         vcpu->arch.ebbhr = set_reg_val(id, *val);
 685                         break;
 686                 case KVM_REG_PPC_EBBRR:
 687                         vcpu->arch.ebbrr = set_reg_val(id, *val);
 688                         break;
 689                 case KVM_REG_PPC_BESCR:
 690                         vcpu->arch.bescr = set_reg_val(id, *val);
 691                         break;
 692                 case KVM_REG_PPC_IC:
 693                         vcpu->arch.ic = set_reg_val(id, *val);
 694                         break;
 695                 default:
 696                         r = -EINVAL;
 697                         break;
 698                 }
 699         }
 700
 701         return r;
 702 }
 703
 704 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 705 {
 706         vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
 707 }
 708
 709 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
 710 {
 711         vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
 712 }
 713
 714 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 715 {
 716         vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
 717 }
 718 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
 719
 720 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 721 {
 722         return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
 723 }
 724
 725 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 726                                   struct kvm_translation *tr)
 727 {
 728         return 0;
 729 }
 730
 731 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 732                                         struct kvm_guest_debug *dbg)
 733 {
 734         vcpu->guest_debug = dbg->control;
 735         return 0;
 736 }
 737
 738 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
 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 kvm->arch.kvm_ops->vcpu_create(kvm, id);
 747 }
 748
 749 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 750 {
 751         vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
 752 }
 753
 754 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 755 {
 756         return vcpu->kvm->arch.kvm_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 kvm->arch.kvm_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         kvm->arch.kvm_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 kvm->arch.kvm_ops->create_memslot(slot, npages);
 774 }
 775
 776 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
 777 {
 778         kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
 779 }
 780
 781 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
 782                                 struct kvm_memory_slot *memslot,
 783                                 const struct kvm_userspace_memory_region *mem)
 784 {
 785         return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
 786 }
 787
 788 void kvmppc_core_commit_memory_region(struct kvm *kvm,
 789                                 const struct kvm_userspace_memory_region *mem,
 790                                 const struct kvm_memory_slot *old,
 791                                 const struct kvm_memory_slot *new)
 792 {
 793         kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new);
 794 }
 795
 796 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
 797 {
 798         return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
 799 }
 800 EXPORT_SYMBOL_GPL(kvm_unmap_hva);
 801
 802 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
 803 {
 804         return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
 805 }
 806
 807 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
 808 {
 809         return kvm->arch.kvm_ops->age_hva(kvm, start, end);
 810 }
 811
 812 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
 813 {
 814         return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
 815 }
 816
 817 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 818 {
 819         kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
 820 }
 821
 822 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
 823 {
 824         vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
 825 }
 826
 827 int kvmppc_core_init_vm(struct kvm *kvm)
 828 {
 829
 830 #ifdef CONFIG_PPC64
 831         INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
 832         INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
 833 #endif
 834
 835         return kvm->arch.kvm_ops->init_vm(kvm);
 836 }
 837
 838 void kvmppc_core_destroy_vm(struct kvm *kvm)
 839 {
 840         kvm->arch.kvm_ops->destroy_vm(kvm);
 841
 842 #ifdef CONFIG_PPC64
 843         kvmppc_rtas_tokens_free(kvm);
 844         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
 845 #endif
 846 }
 847
 848 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
 849 {
 850         unsigned long size = kvmppc_get_gpr(vcpu, 4);
 851         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 852         u64 buf;
 853         int srcu_idx;
 854         int ret;
 855
 856         if (!is_power_of_2(size) || (size > sizeof(buf)))
 857                 return H_TOO_HARD;
 858
 859         srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 860         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 861         srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
 862         if (ret != 0)
 863                 return H_TOO_HARD;
 864
 865         switch (size) {
 866         case 1:
 867                 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
 868                 break;
 869
 870         case 2:
 871                 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
 872                 break;
 873
 874         case 4:
 875                 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
 876                 break;
 877
 878         case 8:
 879                 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
 880                 break;
 881
 882         default:
 883                 BUG();
 884         }
 885
 886         return H_SUCCESS;
 887 }
 888 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
 889
 890 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
 891 {
 892         unsigned long size = kvmppc_get_gpr(vcpu, 4);
 893         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 894         unsigned long val = kvmppc_get_gpr(vcpu, 6);
 895         u64 buf;
 896         int srcu_idx;
 897         int ret;
 898
 899         switch (size) {
 900         case 1:
 901                 *(u8 *)&buf = val;
 902                 break;
 903
 904         case 2:
 905                 *(__be16 *)&buf = cpu_to_be16(val);
 906                 break;
 907
 908         case 4:
 909                 *(__be32 *)&buf = cpu_to_be32(val);
 910                 break;
 911
 912         case 8:
 913                 *(__be64 *)&buf = cpu_to_be64(val);
 914                 break;
 915
 916         default:
 917                 return H_TOO_HARD;
 918         }
 919
 920         srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 921         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 922         srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
 923         if (ret != 0)
 924                 return H_TOO_HARD;
 925
 926         return H_SUCCESS;
 927 }
 928 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
 929
 930 int kvmppc_core_check_processor_compat(void)
 931 {
 932         /*
 933          * We always return 0 for book3s. We check
 934          * for compatibility while loading the HV
 935          * or PR module
 936          */
 937         return 0;
 938 }
 939
 940 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
 941 {
 942         return kvm->arch.kvm_ops->hcall_implemented(hcall);
 943 }
 944
 945 static int kvmppc_book3s_init(void)
 946 {
 947         int r;
 948
 949         r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
 950         if (r)
 951                 return r;
 952 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 953         r = kvmppc_book3s_init_pr();
 954 #endif
 955         return r;
 956
 957 }
 958
 959 static void kvmppc_book3s_exit(void)
 960 {
 961 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 962         kvmppc_book3s_exit_pr();
 963 #endif
 964         kvm_exit();
 965 }
 966
 967 module_init(kvmppc_book3s_init);
 968 module_exit(kvmppc_book3s_exit);
 969
 970 /* On 32bit this is our one and only kernel module */
 971 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 972 MODULE_ALIAS_MISCDEV(KVM_MINOR);
 973 MODULE_ALIAS("devname:kvm");
 974 #endif