arch/powerpc/kvm/book3s.c

   1 /*
   2  * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
   3  *
   4  * Authors:
   5  *    Alexander Graf <[email protected]>
   6  *    Kevin Wolf <[email protected]>
   7  *
   8  * Description:
   9  * This file is derived from arch/powerpc/kvm/44x.c,
  10  * by Hollis Blanchard <[email protected]>.
  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 <linux/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_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_dec(struct kvm_vcpu *vcpu)
 201 {
 202         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 203 }
 204 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
 205
 206 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 207 {
 208         return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 209 }
 210 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
 211
 212 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 213 {
 214         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 215 }
 216 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
 217
 218 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 219                                 struct kvm_interrupt *irq)
 220 {
 221         unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
 222
 223         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 224                 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
 225
 226         kvmppc_book3s_queue_irqprio(vcpu, vec);
 227 }
 228
 229 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 230 {
 231         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 232         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
 233 }
 234
 235 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
 236                                     ulong flags)
 237 {
 238         kvmppc_set_dar(vcpu, dar);
 239         kvmppc_set_dsisr(vcpu, flags);
 240         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE);
 241 }
 242 EXPORT_SYMBOL_GPL(kvmppc_core_queue_data_storage);      /* used by kvm_hv */
 243
 244 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
 245 {
 246         u64 msr = kvmppc_get_msr(vcpu);
 247         msr &= ~(SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
 248         msr |= flags & (SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
 249         kvmppc_set_msr_fast(vcpu, msr);
 250         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
 251 }
 252
 253 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
 254                                          unsigned int priority)
 255 {
 256         int deliver = 1;
 257         int vec = 0;
 258         bool crit = kvmppc_critical_section(vcpu);
 259
 260         switch (priority) {
 261         case BOOK3S_IRQPRIO_DECREMENTER:
 262                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 263                 vec = BOOK3S_INTERRUPT_DECREMENTER;
 264                 break;
 265         case BOOK3S_IRQPRIO_EXTERNAL:
 266         case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 267                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 268                 vec = BOOK3S_INTERRUPT_EXTERNAL;
 269                 break;
 270         case BOOK3S_IRQPRIO_SYSTEM_RESET:
 271                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
 272                 break;
 273         case BOOK3S_IRQPRIO_MACHINE_CHECK:
 274                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
 275                 break;
 276         case BOOK3S_IRQPRIO_DATA_STORAGE:
 277                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
 278                 break;
 279         case BOOK3S_IRQPRIO_INST_STORAGE:
 280                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
 281                 break;
 282         case BOOK3S_IRQPRIO_DATA_SEGMENT:
 283                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
 284                 break;
 285         case BOOK3S_IRQPRIO_INST_SEGMENT:
 286                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
 287                 break;
 288         case BOOK3S_IRQPRIO_ALIGNMENT:
 289                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
 290                 break;
 291         case BOOK3S_IRQPRIO_PROGRAM:
 292                 vec = BOOK3S_INTERRUPT_PROGRAM;
 293                 break;
 294         case BOOK3S_IRQPRIO_VSX:
 295                 vec = BOOK3S_INTERRUPT_VSX;
 296                 break;
 297         case BOOK3S_IRQPRIO_ALTIVEC:
 298                 vec = BOOK3S_INTERRUPT_ALTIVEC;
 299                 break;
 300         case BOOK3S_IRQPRIO_FP_UNAVAIL:
 301                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
 302                 break;
 303         case BOOK3S_IRQPRIO_SYSCALL:
 304                 vec = BOOK3S_INTERRUPT_SYSCALL;
 305                 break;
 306         case BOOK3S_IRQPRIO_DEBUG:
 307                 vec = BOOK3S_INTERRUPT_TRACE;
 308                 break;
 309         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
 310                 vec = BOOK3S_INTERRUPT_PERFMON;
 311                 break;
 312         case BOOK3S_IRQPRIO_FAC_UNAVAIL:
 313                 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
 314                 break;
 315         default:
 316                 deliver = 0;
 317                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
 318                 break;
 319         }
 320
 321 #if 0
 322         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
 323 #endif
 324
 325         if (deliver)
 326                 kvmppc_inject_interrupt(vcpu, vec, 0);
 327
 328         return deliver;
 329 }
 330
 331 /*
 332  * This function determines if an irqprio should be cleared once issued.
 333  */
 334 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
 335 {
 336         switch (priority) {
 337                 case BOOK3S_IRQPRIO_DECREMENTER:
 338                         /* DEC interrupts get cleared by mtdec */
 339                         return false;
 340                 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 341                         /* External interrupts get cleared by userspace */
 342                         return false;
 343         }
 344
 345         return true;
 346 }
 347
 348 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 349 {
 350         unsigned long *pending = &vcpu->arch.pending_exceptions;
 351         unsigned long old_pending = vcpu->arch.pending_exceptions;
 352         unsigned int priority;
 353
 354 #ifdef EXIT_DEBUG
 355         if (vcpu->arch.pending_exceptions)
 356                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
 357 #endif
 358         priority = __ffs(*pending);
 359         while (priority < BOOK3S_IRQPRIO_MAX) {
 360                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
 361                     clear_irqprio(vcpu, priority)) {
 362                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 363                         break;
 364                 }
 365
 366                 priority = find_next_bit(pending,
 367                                          BITS_PER_BYTE * sizeof(*pending),
 368                                          priority + 1);
 369         }
 370
 371         /* Tell the guest about our interrupt status */
 372         kvmppc_update_int_pending(vcpu, *pending, old_pending);
 373
 374         return 0;
 375 }
 376 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
 377
 378 kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
 379                         bool *writable)
 380 {
 381         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
 382         gfn_t gfn = gpa >> PAGE_SHIFT;
 383
 384         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 385                 mp_pa = (uint32_t)mp_pa;
 386
 387         /* Magic page override */
 388         gpa &= ~0xFFFULL;
 389         if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
 390                 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
 391                 kvm_pfn_t pfn;
 392
 393                 pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
 394                 get_page(pfn_to_page(pfn));
 395                 if (writable)
 396                         *writable = true;
 397                 return pfn;
 398         }
 399
 400         return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
 401 }
 402 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
 403
 404 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
 405                  enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
 406 {
 407         bool data = (xlid == XLATE_DATA);
 408         bool iswrite = (xlrw == XLATE_WRITE);
 409         int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
 410         int r;
 411
 412         if (relocated) {
 413                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
 414         } else {
 415                 pte->eaddr = eaddr;
 416                 pte->raddr = eaddr & KVM_PAM;
 417                 pte->vpage = VSID_REAL | eaddr >> 12;
 418                 pte->may_read = true;
 419                 pte->may_write = true;
 420                 pte->may_execute = true;
 421                 r = 0;
 422
 423                 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
 424                     !data) {
 425                         if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
 426                             ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
 427                         pte->raddr &= ~SPLIT_HACK_MASK;
 428                 }
 429         }
 430
 431         return r;
 432 }
 433
 434 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, enum instruction_type type,
 435                                          u32 *inst)
 436 {
 437         ulong pc = kvmppc_get_pc(vcpu);
 438         int r;
 439
 440         if (type == INST_SC)
 441                 pc -= 4;
 442
 443         r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
 444         if (r == EMULATE_DONE)
 445                 return r;
 446         else
 447                 return EMULATE_AGAIN;
 448 }
 449 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
 450
 451 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 452 {
 453         return 0;
 454 }
 455
 456 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
 457 {
 458         return 0;
 459 }
 460
 461 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
 462 {
 463 }
 464
 465 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 466                                   struct kvm_sregs *sregs)
 467 {
 468         return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
 469 }
 470
 471 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 472                                   struct kvm_sregs *sregs)
 473 {
 474         return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
 475 }
 476
 477 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 478 {
 479         int i;
 480
 481         regs->pc = kvmppc_get_pc(vcpu);
 482         regs->cr = kvmppc_get_cr(vcpu);
 483         regs->ctr = kvmppc_get_ctr(vcpu);
 484         regs->lr = kvmppc_get_lr(vcpu);
 485         regs->xer = kvmppc_get_xer(vcpu);
 486         regs->msr = kvmppc_get_msr(vcpu);
 487         regs->srr0 = kvmppc_get_srr0(vcpu);
 488         regs->srr1 = kvmppc_get_srr1(vcpu);
 489         regs->pid = vcpu->arch.pid;
 490         regs->sprg0 = kvmppc_get_sprg0(vcpu);
 491         regs->sprg1 = kvmppc_get_sprg1(vcpu);
 492         regs->sprg2 = kvmppc_get_sprg2(vcpu);
 493         regs->sprg3 = kvmppc_get_sprg3(vcpu);
 494         regs->sprg4 = kvmppc_get_sprg4(vcpu);
 495         regs->sprg5 = kvmppc_get_sprg5(vcpu);
 496         regs->sprg6 = kvmppc_get_sprg6(vcpu);
 497         regs->sprg7 = kvmppc_get_sprg7(vcpu);
 498
 499         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 500                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 501
 502         return 0;
 503 }
 504
 505 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 506 {
 507         int i;
 508
 509         kvmppc_set_pc(vcpu, regs->pc);
 510         kvmppc_set_cr(vcpu, regs->cr);
 511         kvmppc_set_ctr(vcpu, regs->ctr);
 512         kvmppc_set_lr(vcpu, regs->lr);
 513         kvmppc_set_xer(vcpu, regs->xer);
 514         kvmppc_set_msr(vcpu, regs->msr);
 515         kvmppc_set_srr0(vcpu, regs->srr0);
 516         kvmppc_set_srr1(vcpu, regs->srr1);
 517         kvmppc_set_sprg0(vcpu, regs->sprg0);
 518         kvmppc_set_sprg1(vcpu, regs->sprg1);
 519         kvmppc_set_sprg2(vcpu, regs->sprg2);
 520         kvmppc_set_sprg3(vcpu, regs->sprg3);
 521         kvmppc_set_sprg4(vcpu, regs->sprg4);
 522         kvmppc_set_sprg5(vcpu, regs->sprg5);
 523         kvmppc_set_sprg6(vcpu, regs->sprg6);
 524         kvmppc_set_sprg7(vcpu, regs->sprg7);
 525
 526         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 527                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 528
 529         return 0;
 530 }
 531
 532 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 533 {
 534         return -ENOTSUPP;
 535 }
 536
 537 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 538 {
 539         return -ENOTSUPP;
 540 }
 541
 542 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
 543                         union kvmppc_one_reg *val)
 544 {
 545         int r = 0;
 546         long int i;
 547
 548         r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
 549         if (r == -EINVAL) {
 550                 r = 0;
 551                 switch (id) {
 552                 case KVM_REG_PPC_DAR:
 553                         *val = get_reg_val(id, kvmppc_get_dar(vcpu));
 554                         break;
 555                 case KVM_REG_PPC_DSISR:
 556                         *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
 557                         break;
 558                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 559                         i = id - KVM_REG_PPC_FPR0;
 560                         *val = get_reg_val(id, VCPU_FPR(vcpu, i));
 561                         break;
 562                 case KVM_REG_PPC_FPSCR:
 563                         *val = get_reg_val(id, vcpu->arch.fp.fpscr);
 564                         break;
 565 #ifdef CONFIG_VSX
 566                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 567                         if (cpu_has_feature(CPU_FTR_VSX)) {
 568                                 i = id - KVM_REG_PPC_VSR0;
 569                                 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
 570                                 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
 571                         } else {
 572                                 r = -ENXIO;
 573                         }
 574                         break;
 575 #endif /* CONFIG_VSX */
 576                 case KVM_REG_PPC_DEBUG_INST:
 577                         *val = get_reg_val(id, INS_TW);
 578                         break;
 579 #ifdef CONFIG_KVM_XICS
 580                 case KVM_REG_PPC_ICP_STATE:
 581                         if (!vcpu->arch.icp) {
 582                                 r = -ENXIO;
 583                                 break;
 584                         }
 585                         *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
 586                         break;
 587 #endif /* CONFIG_KVM_XICS */
 588                 case KVM_REG_PPC_FSCR:
 589                         *val = get_reg_val(id, vcpu->arch.fscr);
 590                         break;
 591                 case KVM_REG_PPC_TAR:
 592                         *val = get_reg_val(id, vcpu->arch.tar);
 593                         break;
 594                 case KVM_REG_PPC_EBBHR:
 595                         *val = get_reg_val(id, vcpu->arch.ebbhr);
 596                         break;
 597                 case KVM_REG_PPC_EBBRR:
 598                         *val = get_reg_val(id, vcpu->arch.ebbrr);
 599                         break;
 600                 case KVM_REG_PPC_BESCR:
 601                         *val = get_reg_val(id, vcpu->arch.bescr);
 602                         break;
 603                 case KVM_REG_PPC_IC:
 604                         *val = get_reg_val(id, vcpu->arch.ic);
 605                         break;
 606                 default:
 607                         r = -EINVAL;
 608                         break;
 609                 }
 610         }
 611
 612         return r;
 613 }
 614
 615 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
 616                         union kvmppc_one_reg *val)
 617 {
 618         int r = 0;
 619         long int i;
 620
 621         r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
 622         if (r == -EINVAL) {
 623                 r = 0;
 624                 switch (id) {
 625                 case KVM_REG_PPC_DAR:
 626                         kvmppc_set_dar(vcpu, set_reg_val(id, *val));
 627                         break;
 628                 case KVM_REG_PPC_DSISR:
 629                         kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
 630                         break;
 631                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 632                         i = id - KVM_REG_PPC_FPR0;
 633                         VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
 634                         break;
 635                 case KVM_REG_PPC_FPSCR:
 636                         vcpu->arch.fp.fpscr = set_reg_val(id, *val);
 637                         break;
 638 #ifdef CONFIG_VSX
 639                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 640                         if (cpu_has_feature(CPU_FTR_VSX)) {
 641                                 i = id - KVM_REG_PPC_VSR0;
 642                                 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
 643                                 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
 644                         } else {
 645                                 r = -ENXIO;
 646                         }
 647                         break;
 648 #endif /* CONFIG_VSX */
 649 #ifdef CONFIG_KVM_XICS
 650                 case KVM_REG_PPC_ICP_STATE:
 651                         if (!vcpu->arch.icp) {
 652                                 r = -ENXIO;
 653                                 break;
 654                         }
 655                         r = kvmppc_xics_set_icp(vcpu,
 656                                                 set_reg_val(id, *val));
 657                         break;
 658 #endif /* CONFIG_KVM_XICS */
 659                 case KVM_REG_PPC_FSCR:
 660                         vcpu->arch.fscr = set_reg_val(id, *val);
 661                         break;
 662                 case KVM_REG_PPC_TAR:
 663                         vcpu->arch.tar = set_reg_val(id, *val);
 664                         break;
 665                 case KVM_REG_PPC_EBBHR:
 666                         vcpu->arch.ebbhr = set_reg_val(id, *val);
 667                         break;
 668                 case KVM_REG_PPC_EBBRR:
 669                         vcpu->arch.ebbrr = set_reg_val(id, *val);
 670                         break;
 671                 case KVM_REG_PPC_BESCR:
 672                         vcpu->arch.bescr = set_reg_val(id, *val);
 673                         break;
 674                 case KVM_REG_PPC_IC:
 675                         vcpu->arch.ic = set_reg_val(id, *val);
 676                         break;
 677                 default:
 678                         r = -EINVAL;
 679                         break;
 680                 }
 681         }
 682
 683         return r;
 684 }
 685
 686 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 687 {
 688         vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
 689 }
 690
 691 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
 692 {
 693         vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
 694 }
 695
 696 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 697 {
 698         vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
 699 }
 700 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
 701
 702 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 703 {
 704         return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
 705 }
 706
 707 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 708                                   struct kvm_translation *tr)
 709 {
 710         return 0;
 711 }
 712
 713 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 714                                         struct kvm_guest_debug *dbg)
 715 {
 716         vcpu->guest_debug = dbg->control;
 717         return 0;
 718 }
 719
 720 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
 721 {
 722         kvmppc_core_queue_dec(vcpu);
 723         kvm_vcpu_kick(vcpu);
 724 }
 725
 726 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
 727 {
 728         return kvm->arch.kvm_ops->vcpu_create(kvm, id);
 729 }
 730
 731 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 732 {
 733         vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
 734 }
 735
 736 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 737 {
 738         return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
 739 }
 740
 741 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 742 {
 743         return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
 744 }
 745
 746 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 747                               struct kvm_memory_slot *dont)
 748 {
 749         kvm->arch.kvm_ops->free_memslot(free, dont);
 750 }
 751
 752 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 753                                unsigned long npages)
 754 {
 755         return kvm->arch.kvm_ops->create_memslot(slot, npages);
 756 }
 757
 758 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
 759 {
 760         kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
 761 }
 762
 763 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
 764                                 struct kvm_memory_slot *memslot,
 765                                 const struct kvm_userspace_memory_region *mem)
 766 {
 767         return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
 768 }
 769
 770 void kvmppc_core_commit_memory_region(struct kvm *kvm,
 771                                 const struct kvm_userspace_memory_region *mem,
 772                                 const struct kvm_memory_slot *old,
 773                                 const struct kvm_memory_slot *new)
 774 {
 775         kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new);
 776 }
 777
 778 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
 779 {
 780         return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
 781 }
 782 EXPORT_SYMBOL_GPL(kvm_unmap_hva);
 783
 784 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
 785 {
 786         return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
 787 }
 788
 789 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
 790 {
 791         return kvm->arch.kvm_ops->age_hva(kvm, start, end);
 792 }
 793
 794 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
 795 {
 796         return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
 797 }
 798
 799 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 800 {
 801         kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
 802 }
 803
 804 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
 805 {
 806         vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
 807 }
 808
 809 int kvmppc_core_init_vm(struct kvm *kvm)
 810 {
 811
 812 #ifdef CONFIG_PPC64
 813         INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
 814         INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
 815 #endif
 816
 817         return kvm->arch.kvm_ops->init_vm(kvm);
 818 }
 819
 820 void kvmppc_core_destroy_vm(struct kvm *kvm)
 821 {
 822         kvm->arch.kvm_ops->destroy_vm(kvm);
 823
 824 #ifdef CONFIG_PPC64
 825         kvmppc_rtas_tokens_free(kvm);
 826         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
 827 #endif
 828 }
 829
 830 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
 831 {
 832         unsigned long size = kvmppc_get_gpr(vcpu, 4);
 833         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 834         u64 buf;
 835         int srcu_idx;
 836         int ret;
 837
 838         if (!is_power_of_2(size) || (size > sizeof(buf)))
 839                 return H_TOO_HARD;
 840
 841         srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 842         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 843         srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
 844         if (ret != 0)
 845                 return H_TOO_HARD;
 846
 847         switch (size) {
 848         case 1:
 849                 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
 850                 break;
 851
 852         case 2:
 853                 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
 854                 break;
 855
 856         case 4:
 857                 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
 858                 break;
 859
 860         case 8:
 861                 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
 862                 break;
 863
 864         default:
 865                 BUG();
 866         }
 867
 868         return H_SUCCESS;
 869 }
 870 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
 871
 872 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
 873 {
 874         unsigned long size = kvmppc_get_gpr(vcpu, 4);
 875         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 876         unsigned long val = kvmppc_get_gpr(vcpu, 6);
 877         u64 buf;
 878         int srcu_idx;
 879         int ret;
 880
 881         switch (size) {
 882         case 1:
 883                 *(u8 *)&buf = val;
 884                 break;
 885
 886         case 2:
 887                 *(__be16 *)&buf = cpu_to_be16(val);
 888                 break;
 889
 890         case 4:
 891                 *(__be32 *)&buf = cpu_to_be32(val);
 892                 break;
 893
 894         case 8:
 895                 *(__be64 *)&buf = cpu_to_be64(val);
 896                 break;
 897
 898         default:
 899                 return H_TOO_HARD;
 900         }
 901
 902         srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 903         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 904         srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
 905         if (ret != 0)
 906                 return H_TOO_HARD;
 907
 908         return H_SUCCESS;
 909 }
 910 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
 911
 912 int kvmppc_core_check_processor_compat(void)
 913 {
 914         /*
 915          * We always return 0 for book3s. We check
 916          * for compatibility while loading the HV
 917          * or PR module
 918          */
 919         return 0;
 920 }
 921
 922 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
 923 {
 924         return kvm->arch.kvm_ops->hcall_implemented(hcall);
 925 }
 926
 927 static int kvmppc_book3s_init(void)
 928 {
 929         int r;
 930
 931         r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
 932         if (r)
 933                 return r;
 934 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 935         r = kvmppc_book3s_init_pr();
 936 #endif
 937         return r;
 938
 939 }
 940
 941 static void kvmppc_book3s_exit(void)
 942 {
 943 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 944         kvmppc_book3s_exit_pr();
 945 #endif
 946         kvm_exit();
 947 }
 948
 949 module_init(kvmppc_book3s_init);
 950 module_exit(kvmppc_book3s_exit);
 951
 952 /* On 32bit this is our one and only kernel module */
 953 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 954 MODULE_ALIAS_MISCDEV(KVM_MINOR);
 955 MODULE_ALIAS("devname:kvm");
 956 #endif