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 #include <asm/xive.h>
  39
  40 #include "book3s.h"
  41 #include "trace.h"
  42
  43 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  44
  45 /* #define EXIT_DEBUG */
  46
  47 struct kvm_stats_debugfs_item debugfs_entries[] = {
  48         { "exits",       VCPU_STAT(sum_exits) },
  49         { "mmio",        VCPU_STAT(mmio_exits) },
  50         { "sig",         VCPU_STAT(signal_exits) },
  51         { "sysc",        VCPU_STAT(syscall_exits) },
  52         { "inst_emu",    VCPU_STAT(emulated_inst_exits) },
  53         { "dec",         VCPU_STAT(dec_exits) },
  54         { "ext_intr",    VCPU_STAT(ext_intr_exits) },
  55         { "queue_intr",  VCPU_STAT(queue_intr) },
  56         { "halt_poll_success_ns",       VCPU_STAT(halt_poll_success_ns) },
  57         { "halt_poll_fail_ns",          VCPU_STAT(halt_poll_fail_ns) },
  58         { "halt_wait_ns",               VCPU_STAT(halt_wait_ns) },
  59         { "halt_successful_poll", VCPU_STAT(halt_successful_poll), },
  60         { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll), },
  61         { "halt_successful_wait",       VCPU_STAT(halt_successful_wait) },
  62         { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
  63         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  64         { "pf_storage",  VCPU_STAT(pf_storage) },
  65         { "sp_storage",  VCPU_STAT(sp_storage) },
  66         { "pf_instruc",  VCPU_STAT(pf_instruc) },
  67         { "sp_instruc",  VCPU_STAT(sp_instruc) },
  68         { "ld",          VCPU_STAT(ld) },
  69         { "ld_slow",     VCPU_STAT(ld_slow) },
  70         { "st",          VCPU_STAT(st) },
  71         { "st_slow",     VCPU_STAT(st_slow) },
  72         { "pthru_all",       VCPU_STAT(pthru_all) },
  73         { "pthru_host",      VCPU_STAT(pthru_host) },
  74         { "pthru_bad_aff",   VCPU_STAT(pthru_bad_aff) },
  75         { NULL }
  76 };
  77
  78 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu)
  79 {
  80         if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) {
  81                 ulong pc = kvmppc_get_pc(vcpu);
  82                 if ((pc & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
  83                         kvmppc_set_pc(vcpu, pc & ~SPLIT_HACK_MASK);
  84                 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SPLIT_HACK;
  85         }
  86 }
  87 EXPORT_SYMBOL_GPL(kvmppc_unfixup_split_real);
  88
  89 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
  90 {
  91         if (!is_kvmppc_hv_enabled(vcpu->kvm))
  92                 return to_book3s(vcpu)->hior;
  93         return 0;
  94 }
  95
  96 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
  97                         unsigned long pending_now, unsigned long old_pending)
  98 {
  99         if (is_kvmppc_hv_enabled(vcpu->kvm))
 100                 return;
 101         if (pending_now)
 102                 kvmppc_set_int_pending(vcpu, 1);
 103         else if (old_pending)
 104                 kvmppc_set_int_pending(vcpu, 0);
 105 }
 106
 107 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
 108 {
 109         ulong crit_raw;
 110         ulong crit_r1;
 111         bool crit;
 112
 113         if (is_kvmppc_hv_enabled(vcpu->kvm))
 114                 return false;
 115
 116         crit_raw = kvmppc_get_critical(vcpu);
 117         crit_r1 = kvmppc_get_gpr(vcpu, 1);
 118
 119         /* Truncate crit indicators in 32 bit mode */
 120         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 121                 crit_raw &= 0xffffffff;
 122                 crit_r1 &= 0xffffffff;
 123         }
 124
 125         /* Critical section when crit == r1 */
 126         crit = (crit_raw == crit_r1);
 127         /* ... and we're in supervisor mode */
 128         crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
 129
 130         return crit;
 131 }
 132
 133 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
 134 {
 135         kvmppc_unfixup_split_real(vcpu);
 136         kvmppc_set_srr0(vcpu, kvmppc_get_pc(vcpu));
 137         kvmppc_set_srr1(vcpu, (kvmppc_get_msr(vcpu) & ~0x783f0000ul) | flags);
 138         kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
 139         vcpu->arch.mmu.reset_msr(vcpu);
 140 }
 141
 142 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
 143 {
 144         unsigned int prio;
 145
 146         switch (vec) {
 147         case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;         break;
 148         case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;        break;
 149         case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;         break;
 150         case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;         break;
 151         case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;         break;
 152         case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;         break;
 153         case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;             break;
 154         case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL;       break;
 155         case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;            break;
 156         case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;              break;
 157         case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;           break;
 158         case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;          break;
 159         case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;              break;
 160         case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;                break;
 161         case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;              break;
 162         case 0xf40: prio = BOOK3S_IRQPRIO_VSX;                  break;
 163         case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL;          break;
 164         default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
 165         }
 166
 167         return prio;
 168 }
 169
 170 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 171                                           unsigned int vec)
 172 {
 173         unsigned long old_pending = vcpu->arch.pending_exceptions;
 174
 175         clear_bit(kvmppc_book3s_vec2irqprio(vec),
 176                   &vcpu->arch.pending_exceptions);
 177
 178         kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
 179                                   old_pending);
 180 }
 181
 182 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
 183 {
 184         vcpu->stat.queue_intr++;
 185
 186         set_bit(kvmppc_book3s_vec2irqprio(vec),
 187                 &vcpu->arch.pending_exceptions);
 188 #ifdef EXIT_DEBUG
 189         printk(KERN_INFO "Queueing interrupt %x\n", vec);
 190 #endif
 191 }
 192 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
 193
 194 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
 195 {
 196         /* might as well deliver this straight away */
 197         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
 198 }
 199 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
 200
 201 void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu)
 202 {
 203         /* might as well deliver this straight away */
 204         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, 0);
 205 }
 206
 207 void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu)
 208 {
 209         /* might as well deliver this straight away */
 210         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_ALTIVEC, 0);
 211 }
 212
 213 void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu)
 214 {
 215         /* might as well deliver this straight away */
 216         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_VSX, 0);
 217 }
 218
 219 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 220 {
 221         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 222 }
 223 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
 224
 225 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 226 {
 227         return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 228 }
 229 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
 230
 231 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 232 {
 233         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 234 }
 235 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
 236
 237 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 238                                 struct kvm_interrupt *irq)
 239 {
 240         unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
 241
 242         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 243                 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
 244
 245         kvmppc_book3s_queue_irqprio(vcpu, vec);
 246 }
 247
 248 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 249 {
 250         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 251         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
 252 }
 253
 254 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
 255                                     ulong flags)
 256 {
 257         kvmppc_set_dar(vcpu, dar);
 258         kvmppc_set_dsisr(vcpu, flags);
 259         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0);
 260 }
 261 EXPORT_SYMBOL_GPL(kvmppc_core_queue_data_storage);
 262
 263 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
 264 {
 265         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE, flags);
 266 }
 267 EXPORT_SYMBOL_GPL(kvmppc_core_queue_inst_storage);
 268
 269 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
 270                                          unsigned int priority)
 271 {
 272         int deliver = 1;
 273         int vec = 0;
 274         bool crit = kvmppc_critical_section(vcpu);
 275
 276         switch (priority) {
 277         case BOOK3S_IRQPRIO_DECREMENTER:
 278                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 279                 vec = BOOK3S_INTERRUPT_DECREMENTER;
 280                 break;
 281         case BOOK3S_IRQPRIO_EXTERNAL:
 282         case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 283                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 284                 vec = BOOK3S_INTERRUPT_EXTERNAL;
 285                 break;
 286         case BOOK3S_IRQPRIO_SYSTEM_RESET:
 287                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
 288                 break;
 289         case BOOK3S_IRQPRIO_MACHINE_CHECK:
 290                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
 291                 break;
 292         case BOOK3S_IRQPRIO_DATA_STORAGE:
 293                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
 294                 break;
 295         case BOOK3S_IRQPRIO_INST_STORAGE:
 296                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
 297                 break;
 298         case BOOK3S_IRQPRIO_DATA_SEGMENT:
 299                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
 300                 break;
 301         case BOOK3S_IRQPRIO_INST_SEGMENT:
 302                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
 303                 break;
 304         case BOOK3S_IRQPRIO_ALIGNMENT:
 305                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
 306                 break;
 307         case BOOK3S_IRQPRIO_PROGRAM:
 308                 vec = BOOK3S_INTERRUPT_PROGRAM;
 309                 break;
 310         case BOOK3S_IRQPRIO_VSX:
 311                 vec = BOOK3S_INTERRUPT_VSX;
 312                 break;
 313         case BOOK3S_IRQPRIO_ALTIVEC:
 314                 vec = BOOK3S_INTERRUPT_ALTIVEC;
 315                 break;
 316         case BOOK3S_IRQPRIO_FP_UNAVAIL:
 317                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
 318                 break;
 319         case BOOK3S_IRQPRIO_SYSCALL:
 320                 vec = BOOK3S_INTERRUPT_SYSCALL;
 321                 break;
 322         case BOOK3S_IRQPRIO_DEBUG:
 323                 vec = BOOK3S_INTERRUPT_TRACE;
 324                 break;
 325         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
 326                 vec = BOOK3S_INTERRUPT_PERFMON;
 327                 break;
 328         case BOOK3S_IRQPRIO_FAC_UNAVAIL:
 329                 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
 330                 break;
 331         default:
 332                 deliver = 0;
 333                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
 334                 break;
 335         }
 336
 337 #if 0
 338         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
 339 #endif
 340
 341         if (deliver)
 342                 kvmppc_inject_interrupt(vcpu, vec, 0);
 343
 344         return deliver;
 345 }
 346
 347 /*
 348  * This function determines if an irqprio should be cleared once issued.
 349  */
 350 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
 351 {
 352         switch (priority) {
 353                 case BOOK3S_IRQPRIO_DECREMENTER:
 354                         /* DEC interrupts get cleared by mtdec */
 355                         return false;
 356                 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
 357                         /* External interrupts get cleared by userspace */
 358                         return false;
 359         }
 360
 361         return true;
 362 }
 363
 364 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 365 {
 366         unsigned long *pending = &vcpu->arch.pending_exceptions;
 367         unsigned long old_pending = vcpu->arch.pending_exceptions;
 368         unsigned int priority;
 369
 370 #ifdef EXIT_DEBUG
 371         if (vcpu->arch.pending_exceptions)
 372                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
 373 #endif
 374         priority = __ffs(*pending);
 375         while (priority < BOOK3S_IRQPRIO_MAX) {
 376                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
 377                     clear_irqprio(vcpu, priority)) {
 378                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 379                         break;
 380                 }
 381
 382                 priority = find_next_bit(pending,
 383                                          BITS_PER_BYTE * sizeof(*pending),
 384                                          priority + 1);
 385         }
 386
 387         /* Tell the guest about our interrupt status */
 388         kvmppc_update_int_pending(vcpu, *pending, old_pending);
 389
 390         return 0;
 391 }
 392 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
 393
 394 kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
 395                         bool *writable)
 396 {
 397         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
 398         gfn_t gfn = gpa >> PAGE_SHIFT;
 399
 400         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 401                 mp_pa = (uint32_t)mp_pa;
 402
 403         /* Magic page override */
 404         gpa &= ~0xFFFULL;
 405         if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
 406                 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
 407                 kvm_pfn_t pfn;
 408
 409                 pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
 410                 get_page(pfn_to_page(pfn));
 411                 if (writable)
 412                         *writable = true;
 413                 return pfn;
 414         }
 415
 416         return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
 417 }
 418 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
 419
 420 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
 421                  enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
 422 {
 423         bool data = (xlid == XLATE_DATA);
 424         bool iswrite = (xlrw == XLATE_WRITE);
 425         int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
 426         int r;
 427
 428         if (relocated) {
 429                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
 430         } else {
 431                 pte->eaddr = eaddr;
 432                 pte->raddr = eaddr & KVM_PAM;
 433                 pte->vpage = VSID_REAL | eaddr >> 12;
 434                 pte->may_read = true;
 435                 pte->may_write = true;
 436                 pte->may_execute = true;
 437                 r = 0;
 438
 439                 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
 440                     !data) {
 441                         if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
 442                             ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
 443                         pte->raddr &= ~SPLIT_HACK_MASK;
 444                 }
 445         }
 446
 447         return r;
 448 }
 449
 450 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu,
 451                 enum instruction_fetch_type type, u32 *inst)
 452 {
 453         ulong pc = kvmppc_get_pc(vcpu);
 454         int r;
 455
 456         if (type == INST_SC)
 457                 pc -= 4;
 458
 459         r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
 460         if (r == EMULATE_DONE)
 461                 return r;
 462         else
 463                 return EMULATE_AGAIN;
 464 }
 465 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
 466
 467 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 468 {
 469         return 0;
 470 }
 471
 472 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
 473 {
 474         return 0;
 475 }
 476
 477 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
 478 {
 479 }
 480
 481 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 482                                   struct kvm_sregs *sregs)
 483 {
 484         int ret;
 485
 486         vcpu_load(vcpu);
 487         ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
 488         vcpu_put(vcpu);
 489
 490         return ret;
 491 }
 492
 493 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 494                                   struct kvm_sregs *sregs)
 495 {
 496         int ret;
 497
 498         vcpu_load(vcpu);
 499         ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
 500         vcpu_put(vcpu);
 501
 502         return ret;
 503 }
 504
 505 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 506 {
 507         int i;
 508
 509         regs->pc = kvmppc_get_pc(vcpu);
 510         regs->cr = kvmppc_get_cr(vcpu);
 511         regs->ctr = kvmppc_get_ctr(vcpu);
 512         regs->lr = kvmppc_get_lr(vcpu);
 513         regs->xer = kvmppc_get_xer(vcpu);
 514         regs->msr = kvmppc_get_msr(vcpu);
 515         regs->srr0 = kvmppc_get_srr0(vcpu);
 516         regs->srr1 = kvmppc_get_srr1(vcpu);
 517         regs->pid = vcpu->arch.pid;
 518         regs->sprg0 = kvmppc_get_sprg0(vcpu);
 519         regs->sprg1 = kvmppc_get_sprg1(vcpu);
 520         regs->sprg2 = kvmppc_get_sprg2(vcpu);
 521         regs->sprg3 = kvmppc_get_sprg3(vcpu);
 522         regs->sprg4 = kvmppc_get_sprg4(vcpu);
 523         regs->sprg5 = kvmppc_get_sprg5(vcpu);
 524         regs->sprg6 = kvmppc_get_sprg6(vcpu);
 525         regs->sprg7 = kvmppc_get_sprg7(vcpu);
 526
 527         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 528                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 529
 530         return 0;
 531 }
 532
 533 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 534 {
 535         int i;
 536
 537         kvmppc_set_pc(vcpu, regs->pc);
 538         kvmppc_set_cr(vcpu, regs->cr);
 539         kvmppc_set_ctr(vcpu, regs->ctr);
 540         kvmppc_set_lr(vcpu, regs->lr);
 541         kvmppc_set_xer(vcpu, regs->xer);
 542         kvmppc_set_msr(vcpu, regs->msr);
 543         kvmppc_set_srr0(vcpu, regs->srr0);
 544         kvmppc_set_srr1(vcpu, regs->srr1);
 545         kvmppc_set_sprg0(vcpu, regs->sprg0);
 546         kvmppc_set_sprg1(vcpu, regs->sprg1);
 547         kvmppc_set_sprg2(vcpu, regs->sprg2);
 548         kvmppc_set_sprg3(vcpu, regs->sprg3);
 549         kvmppc_set_sprg4(vcpu, regs->sprg4);
 550         kvmppc_set_sprg5(vcpu, regs->sprg5);
 551         kvmppc_set_sprg6(vcpu, regs->sprg6);
 552         kvmppc_set_sprg7(vcpu, regs->sprg7);
 553
 554         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 555                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 556
 557         return 0;
 558 }
 559
 560 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 561 {
 562         return -ENOTSUPP;
 563 }
 564
 565 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 566 {
 567         return -ENOTSUPP;
 568 }
 569
 570 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
 571                         union kvmppc_one_reg *val)
 572 {
 573         int r = 0;
 574         long int i;
 575
 576         r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
 577         if (r == -EINVAL) {
 578                 r = 0;
 579                 switch (id) {
 580                 case KVM_REG_PPC_DAR:
 581                         *val = get_reg_val(id, kvmppc_get_dar(vcpu));
 582                         break;
 583                 case KVM_REG_PPC_DSISR:
 584                         *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
 585                         break;
 586                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 587                         i = id - KVM_REG_PPC_FPR0;
 588                         *val = get_reg_val(id, VCPU_FPR(vcpu, i));
 589                         break;
 590                 case KVM_REG_PPC_FPSCR:
 591                         *val = get_reg_val(id, vcpu->arch.fp.fpscr);
 592                         break;
 593 #ifdef CONFIG_VSX
 594                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 595                         if (cpu_has_feature(CPU_FTR_VSX)) {
 596                                 i = id - KVM_REG_PPC_VSR0;
 597                                 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
 598                                 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
 599                         } else {
 600                                 r = -ENXIO;
 601                         }
 602                         break;
 603 #endif /* CONFIG_VSX */
 604                 case KVM_REG_PPC_DEBUG_INST:
 605                         *val = get_reg_val(id, INS_TW);
 606                         break;
 607 #ifdef CONFIG_KVM_XICS
 608                 case KVM_REG_PPC_ICP_STATE:
 609                         if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
 610                                 r = -ENXIO;
 611                                 break;
 612                         }
 613                         if (xive_enabled())
 614                                 *val = get_reg_val(id, kvmppc_xive_get_icp(vcpu));
 615                         else
 616                                 *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
 617                         break;
 618 #endif /* CONFIG_KVM_XICS */
 619                 case KVM_REG_PPC_FSCR:
 620                         *val = get_reg_val(id, vcpu->arch.fscr);
 621                         break;
 622                 case KVM_REG_PPC_TAR:
 623                         *val = get_reg_val(id, vcpu->arch.tar);
 624                         break;
 625                 case KVM_REG_PPC_EBBHR:
 626                         *val = get_reg_val(id, vcpu->arch.ebbhr);
 627                         break;
 628                 case KVM_REG_PPC_EBBRR:
 629                         *val = get_reg_val(id, vcpu->arch.ebbrr);
 630                         break;
 631                 case KVM_REG_PPC_BESCR:
 632                         *val = get_reg_val(id, vcpu->arch.bescr);
 633                         break;
 634                 case KVM_REG_PPC_IC:
 635                         *val = get_reg_val(id, vcpu->arch.ic);
 636                         break;
 637                 default:
 638                         r = -EINVAL;
 639                         break;
 640                 }
 641         }
 642
 643         return r;
 644 }
 645
 646 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
 647                         union kvmppc_one_reg *val)
 648 {
 649         int r = 0;
 650         long int i;
 651
 652         r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
 653         if (r == -EINVAL) {
 654                 r = 0;
 655                 switch (id) {
 656                 case KVM_REG_PPC_DAR:
 657                         kvmppc_set_dar(vcpu, set_reg_val(id, *val));
 658                         break;
 659                 case KVM_REG_PPC_DSISR:
 660                         kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
 661                         break;
 662                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 663                         i = id - KVM_REG_PPC_FPR0;
 664                         VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
 665                         break;
 666                 case KVM_REG_PPC_FPSCR:
 667                         vcpu->arch.fp.fpscr = set_reg_val(id, *val);
 668                         break;
 669 #ifdef CONFIG_VSX
 670                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 671                         if (cpu_has_feature(CPU_FTR_VSX)) {
 672                                 i = id - KVM_REG_PPC_VSR0;
 673                                 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
 674                                 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
 675                         } else {
 676                                 r = -ENXIO;
 677                         }
 678                         break;
 679 #endif /* CONFIG_VSX */
 680 #ifdef CONFIG_KVM_XICS
 681                 case KVM_REG_PPC_ICP_STATE:
 682                         if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
 683                                 r = -ENXIO;
 684                                 break;
 685                         }
 686                         if (xive_enabled())
 687                                 r = kvmppc_xive_set_icp(vcpu, set_reg_val(id, *val));
 688                         else
 689                                 r = kvmppc_xics_set_icp(vcpu, set_reg_val(id, *val));
 690                         break;
 691 #endif /* CONFIG_KVM_XICS */
 692                 case KVM_REG_PPC_FSCR:
 693                         vcpu->arch.fscr = set_reg_val(id, *val);
 694                         break;
 695                 case KVM_REG_PPC_TAR:
 696                         vcpu->arch.tar = set_reg_val(id, *val);
 697                         break;
 698                 case KVM_REG_PPC_EBBHR:
 699                         vcpu->arch.ebbhr = set_reg_val(id, *val);
 700                         break;
 701                 case KVM_REG_PPC_EBBRR:
 702                         vcpu->arch.ebbrr = set_reg_val(id, *val);
 703                         break;
 704                 case KVM_REG_PPC_BESCR:
 705                         vcpu->arch.bescr = set_reg_val(id, *val);
 706                         break;
 707                 case KVM_REG_PPC_IC:
 708                         vcpu->arch.ic = set_reg_val(id, *val);
 709                         break;
 710                 default:
 711                         r = -EINVAL;
 712                         break;
 713                 }
 714         }
 715
 716         return r;
 717 }
 718
 719 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 720 {
 721         vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
 722 }
 723
 724 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
 725 {
 726         vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
 727 }
 728
 729 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 730 {
 731         vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
 732 }
 733 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
 734
 735 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 736 {
 737         return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
 738 }
 739
 740 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 741                                   struct kvm_translation *tr)
 742 {
 743         return 0;
 744 }
 745
 746 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 747                                         struct kvm_guest_debug *dbg)
 748 {
 749         vcpu_load(vcpu);
 750         vcpu->guest_debug = dbg->control;
 751         vcpu_put(vcpu);
 752         return 0;
 753 }
 754
 755 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
 756 {
 757         kvmppc_core_queue_dec(vcpu);
 758         kvm_vcpu_kick(vcpu);
 759 }
 760
 761 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
 762 {
 763         return kvm->arch.kvm_ops->vcpu_create(kvm, id);
 764 }
 765
 766 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 767 {
 768         vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
 769 }
 770
 771 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 772 {
 773         return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
 774 }
 775
 776 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 777 {
 778         return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
 779 }
 780
 781 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 782                               struct kvm_memory_slot *dont)
 783 {
 784         kvm->arch.kvm_ops->free_memslot(free, dont);
 785 }
 786
 787 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 788                                unsigned long npages)
 789 {
 790         return kvm->arch.kvm_ops->create_memslot(slot, npages);
 791 }
 792
 793 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
 794 {
 795         kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
 796 }
 797
 798 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
 799                                 struct kvm_memory_slot *memslot,
 800                                 const struct kvm_userspace_memory_region *mem)
 801 {
 802         return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
 803 }
 804
 805 void kvmppc_core_commit_memory_region(struct kvm *kvm,
 806                                 const struct kvm_userspace_memory_region *mem,
 807                                 const struct kvm_memory_slot *old,
 808                                 const struct kvm_memory_slot *new)
 809 {
 810         kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new);
 811 }
 812
 813 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
 814 {
 815         return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
 816 }
 817
 818 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
 819 {
 820         return kvm->arch.kvm_ops->age_hva(kvm, start, end);
 821 }
 822
 823 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
 824 {
 825         return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
 826 }
 827
 828 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 829 {
 830         kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
 831 }
 832
 833 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
 834 {
 835         vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
 836 }
 837
 838 int kvmppc_core_init_vm(struct kvm *kvm)
 839 {
 840
 841 #ifdef CONFIG_PPC64
 842         INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
 843         INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
 844 #endif
 845
 846         return kvm->arch.kvm_ops->init_vm(kvm);
 847 }
 848
 849 void kvmppc_core_destroy_vm(struct kvm *kvm)
 850 {
 851         kvm->arch.kvm_ops->destroy_vm(kvm);
 852
 853 #ifdef CONFIG_PPC64
 854         kvmppc_rtas_tokens_free(kvm);
 855         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
 856 #endif
 857 }
 858
 859 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
 860 {
 861         unsigned long size = kvmppc_get_gpr(vcpu, 4);
 862         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 863         u64 buf;
 864         int srcu_idx;
 865         int ret;
 866
 867         if (!is_power_of_2(size) || (size > sizeof(buf)))
 868                 return H_TOO_HARD;
 869
 870         srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 871         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 872         srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
 873         if (ret != 0)
 874                 return H_TOO_HARD;
 875
 876         switch (size) {
 877         case 1:
 878                 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
 879                 break;
 880
 881         case 2:
 882                 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
 883                 break;
 884
 885         case 4:
 886                 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
 887                 break;
 888
 889         case 8:
 890                 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
 891                 break;
 892
 893         default:
 894                 BUG();
 895         }
 896
 897         return H_SUCCESS;
 898 }
 899 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
 900
 901 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
 902 {
 903         unsigned long size = kvmppc_get_gpr(vcpu, 4);
 904         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 905         unsigned long val = kvmppc_get_gpr(vcpu, 6);
 906         u64 buf;
 907         int srcu_idx;
 908         int ret;
 909
 910         switch (size) {
 911         case 1:
 912                 *(u8 *)&buf = val;
 913                 break;
 914
 915         case 2:
 916                 *(__be16 *)&buf = cpu_to_be16(val);
 917                 break;
 918
 919         case 4:
 920                 *(__be32 *)&buf = cpu_to_be32(val);
 921                 break;
 922
 923         case 8:
 924                 *(__be64 *)&buf = cpu_to_be64(val);
 925                 break;
 926
 927         default:
 928                 return H_TOO_HARD;
 929         }
 930
 931         srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 932         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 933         srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
 934         if (ret != 0)
 935                 return H_TOO_HARD;
 936
 937         return H_SUCCESS;
 938 }
 939 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
 940
 941 int kvmppc_core_check_processor_compat(void)
 942 {
 943         /*
 944          * We always return 0 for book3s. We check
 945          * for compatibility while loading the HV
 946          * or PR module
 947          */
 948         return 0;
 949 }
 950
 951 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
 952 {
 953         return kvm->arch.kvm_ops->hcall_implemented(hcall);
 954 }
 955
 956 #ifdef CONFIG_KVM_XICS
 957 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
 958                 bool line_status)
 959 {
 960         if (xive_enabled())
 961                 return kvmppc_xive_set_irq(kvm, irq_source_id, irq, level,
 962                                            line_status);
 963         else
 964                 return kvmppc_xics_set_irq(kvm, irq_source_id, irq, level,
 965                                            line_status);
 966 }
 967
 968 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *irq_entry,
 969                               struct kvm *kvm, int irq_source_id,
 970                               int level, bool line_status)
 971 {
 972         return kvm_set_irq(kvm, irq_source_id, irq_entry->gsi,
 973                            level, line_status);
 974 }
 975 static int kvmppc_book3s_set_irq(struct kvm_kernel_irq_routing_entry *e,
 976                                  struct kvm *kvm, int irq_source_id, int level,
 977                                  bool line_status)
 978 {
 979         return kvm_set_irq(kvm, irq_source_id, e->gsi, level, line_status);
 980 }
 981
 982 int kvm_irq_map_gsi(struct kvm *kvm,
 983                     struct kvm_kernel_irq_routing_entry *entries, int gsi)
 984 {
 985         entries->gsi = gsi;
 986         entries->type = KVM_IRQ_ROUTING_IRQCHIP;
 987         entries->set = kvmppc_book3s_set_irq;
 988         entries->irqchip.irqchip = 0;
 989         entries->irqchip.pin = gsi;
 990         return 1;
 991 }
 992
 993 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin)
 994 {
 995         return pin;
 996 }
 997
 998 #endif /* CONFIG_KVM_XICS */
 999
1000 static int kvmppc_book3s_init(void)
1001 {
1002         int r;
1003
1004         r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
1005         if (r)
1006                 return r;
1007 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1008         r = kvmppc_book3s_init_pr();
1009 #endif
1010
1011 #ifdef CONFIG_KVM_XICS
1012 #ifdef CONFIG_KVM_XIVE
1013         if (xive_enabled()) {
1014                 kvmppc_xive_init_module();
1015                 kvm_register_device_ops(&kvm_xive_ops, KVM_DEV_TYPE_XICS);
1016         } else
1017 #endif
1018                 kvm_register_device_ops(&kvm_xics_ops, KVM_DEV_TYPE_XICS);
1019 #endif
1020         return r;
1021 }
1022
1023 static void kvmppc_book3s_exit(void)
1024 {
1025 #ifdef CONFIG_KVM_XICS
1026         if (xive_enabled())
1027                 kvmppc_xive_exit_module();
1028 #endif
1029 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1030         kvmppc_book3s_exit_pr();
1031 #endif
1032         kvm_exit();
1033 }
1034
1035 module_init(kvmppc_book3s_init);
1036 module_exit(kvmppc_book3s_exit);
1037
1038 /* On 32bit this is our one and only kernel module */
1039 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1040 MODULE_ALIAS_MISCDEV(KVM_MINOR);
1041 MODULE_ALIAS("devname:kvm");
1042 #endif