git.oblomov.eu Git - linux-2.6/blob - arch/powerpc/kvm/emulate.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License, version 2, as
   4  * published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public License
  12  * along with this program; if not, write to the Free Software
  13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14  *
  15  * Copyright IBM Corp. 2007
  16  *
  17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18  */
  19
  20 #include <linux/jiffies.h>
  21 #include <linux/timer.h>
  22 #include <linux/types.h>
  23 #include <linux/string.h>
  24 #include <linux/kvm_host.h>
  25
  26 #include <asm/dcr.h>
  27 #include <asm/dcr-regs.h>
  28 #include <asm/time.h>
  29 #include <asm/byteorder.h>
  30 #include <asm/kvm_ppc.h>
  31
  32 #include "44x_tlb.h"
  33
  34 /* Instruction decoding */
  35 static inline unsigned int get_op(u32 inst)
  36 {
  37         return inst >> 26;
  38 }
  39
  40 static inline unsigned int get_xop(u32 inst)
  41 {
  42         return (inst >> 1) & 0x3ff;
  43 }
  44
  45 static inline unsigned int get_sprn(u32 inst)
  46 {
  47         return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
  48 }
  49
  50 static inline unsigned int get_dcrn(u32 inst)
  51 {
  52         return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
  53 }
  54
  55 static inline unsigned int get_rt(u32 inst)
  56 {
  57         return (inst >> 21) & 0x1f;
  58 }
  59
  60 static inline unsigned int get_rs(u32 inst)
  61 {
  62         return (inst >> 21) & 0x1f;
  63 }
  64
  65 static inline unsigned int get_ra(u32 inst)
  66 {
  67         return (inst >> 16) & 0x1f;
  68 }
  69
  70 static inline unsigned int get_rb(u32 inst)
  71 {
  72         return (inst >> 11) & 0x1f;
  73 }
  74
  75 static inline unsigned int get_rc(u32 inst)
  76 {
  77         return inst & 0x1;
  78 }
  79
  80 static inline unsigned int get_ws(u32 inst)
  81 {
  82         return (inst >> 11) & 0x1f;
  83 }
  84
  85 static inline unsigned int get_d(u32 inst)
  86 {
  87         return inst & 0xffff;
  88 }
  89
  90 static int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
  91                              const struct tlbe *tlbe)
  92 {
  93         gpa_t gpa;
  94
  95         if (!get_tlb_v(tlbe))
  96                 return 0;
  97
  98         /* Does it match current guest AS? */
  99         /* XXX what about IS != DS? */
 100         if (get_tlb_ts(tlbe) != !!(vcpu->arch.msr & MSR_IS))
 101                 return 0;
 102
 103         gpa = get_tlb_raddr(tlbe);
 104         if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
 105                 /* Mapping is not for RAM. */
 106                 return 0;
 107
 108         return 1;
 109 }
 110
 111 static int kvmppc_emul_tlbwe(struct kvm_vcpu *vcpu, u32 inst)
 112 {
 113         u64 eaddr;
 114         u64 raddr;
 115         u64 asid;
 116         u32 flags;
 117         struct tlbe *tlbe;
 118         unsigned int ra;
 119         unsigned int rs;
 120         unsigned int ws;
 121         unsigned int index;
 122
 123         ra = get_ra(inst);
 124         rs = get_rs(inst);
 125         ws = get_ws(inst);
 126
 127         index = vcpu->arch.gpr[ra];
 128         if (index > PPC44x_TLB_SIZE) {
 129                 printk("%s: index %d\n", __func__, index);
 130                 kvmppc_dump_vcpu(vcpu);
 131                 return EMULATE_FAIL;
 132         }
 133
 134         tlbe = &vcpu->arch.guest_tlb[index];
 135
 136         /* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
 137         if (tlbe->word0 & PPC44x_TLB_VALID) {
 138                 eaddr = get_tlb_eaddr(tlbe);
 139                 asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
 140                 kvmppc_mmu_invalidate(vcpu, eaddr, get_tlb_end(tlbe), asid);
 141         }
 142
 143         switch (ws) {
 144         case PPC44x_TLB_PAGEID:
 145                 tlbe->tid = vcpu->arch.mmucr & 0xff;
 146                 tlbe->word0 = vcpu->arch.gpr[rs];
 147                 break;
 148
 149         case PPC44x_TLB_XLAT:
 150                 tlbe->word1 = vcpu->arch.gpr[rs];
 151                 break;
 152
 153         case PPC44x_TLB_ATTRIB:
 154                 tlbe->word2 = vcpu->arch.gpr[rs];
 155                 break;
 156
 157         default:
 158                 return EMULATE_FAIL;
 159         }
 160
 161         if (tlbe_is_host_safe(vcpu, tlbe)) {
 162                 eaddr = get_tlb_eaddr(tlbe);
 163                 raddr = get_tlb_raddr(tlbe);
 164                 asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
 165                 flags = tlbe->word2 & 0xffff;
 166
 167                 /* Create a 4KB mapping on the host. If the guest wanted a
 168                  * large page, only the first 4KB is mapped here and the rest
 169                  * are mapped on the fly. */
 170                 kvmppc_mmu_map(vcpu, eaddr, raddr >> PAGE_SHIFT, asid, flags);
 171         }
 172
 173         KVMTRACE_5D(GTLB_WRITE, vcpu, index,
 174                         tlbe->tid, tlbe->word0, tlbe->word1, tlbe->word2,
 175                         handler);
 176
 177         return EMULATE_DONE;
 178 }
 179
 180 static void kvmppc_emulate_dec(struct kvm_vcpu *vcpu)
 181 {
 182         if (vcpu->arch.tcr & TCR_DIE) {
 183                 /* The decrementer ticks at the same rate as the timebase, so
 184                  * that's how we convert the guest DEC value to the number of
 185                  * host ticks. */
 186                 unsigned long nr_jiffies;
 187
 188                 nr_jiffies = vcpu->arch.dec / tb_ticks_per_jiffy;
 189                 mod_timer(&vcpu->arch.dec_timer,
 190                           get_jiffies_64() + nr_jiffies);
 191         } else {
 192                 del_timer(&vcpu->arch.dec_timer);
 193         }
 194 }
 195
 196 static void kvmppc_emul_rfi(struct kvm_vcpu *vcpu)
 197 {
 198         vcpu->arch.pc = vcpu->arch.srr0;
 199         kvmppc_set_msr(vcpu, vcpu->arch.srr1);
 200 }
 201
 202 /* XXX to do:
 203  * lhax
 204  * lhaux
 205  * lswx
 206  * lswi
 207  * stswx
 208  * stswi
 209  * lha
 210  * lhau
 211  * lmw
 212  * stmw
 213  *
 214  * XXX is_bigendian should depend on MMU mapping or MSR[LE]
 215  */
 216 int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
 217 {
 218         u32 inst = vcpu->arch.last_inst;
 219         u32 ea;
 220         int ra;
 221         int rb;
 222         int rc;
 223         int rs;
 224         int rt;
 225         int sprn;
 226         int dcrn;
 227         enum emulation_result emulated = EMULATE_DONE;
 228         int advance = 1;
 229
 230         switch (get_op(inst)) {
 231         case 3:                                                 /* trap */
 232                 printk("trap!\n");
 233                 kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_PROGRAM);
 234                 advance = 0;
 235                 break;
 236
 237         case 19:
 238                 switch (get_xop(inst)) {
 239                 case 50:                                        /* rfi */
 240                         kvmppc_emul_rfi(vcpu);
 241                         advance = 0;
 242                         break;
 243
 244                 default:
 245                         emulated = EMULATE_FAIL;
 246                         break;
 247                 }
 248                 break;
 249
 250         case 31:
 251                 switch (get_xop(inst)) {
 252
 253                 case 23:                                        /* lwzx */
 254                         rt = get_rt(inst);
 255                         emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
 256                         break;
 257
 258                 case 83:                                        /* mfmsr */
 259                         rt = get_rt(inst);
 260                         vcpu->arch.gpr[rt] = vcpu->arch.msr;
 261                         break;
 262
 263                 case 87:                                        /* lbzx */
 264                         rt = get_rt(inst);
 265                         emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
 266                         break;
 267
 268                 case 131:                                       /* wrtee */
 269                         rs = get_rs(inst);
 270                         vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
 271                                          | (vcpu->arch.gpr[rs] & MSR_EE);
 272                         break;
 273
 274                 case 146:                                       /* mtmsr */
 275                         rs = get_rs(inst);
 276                         kvmppc_set_msr(vcpu, vcpu->arch.gpr[rs]);
 277                         break;
 278
 279                 case 151:                                       /* stwx */
 280                         rs = get_rs(inst);
 281                         emulated = kvmppc_handle_store(run, vcpu,
 282                                                        vcpu->arch.gpr[rs],
 283                                                        4, 1);
 284                         break;
 285
 286                 case 163:                                       /* wrteei */
 287                         vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
 288                                          | (inst & MSR_EE);
 289                         break;
 290
 291                 case 215:                                       /* stbx */
 292                         rs = get_rs(inst);
 293                         emulated = kvmppc_handle_store(run, vcpu,
 294                                                        vcpu->arch.gpr[rs],
 295                                                        1, 1);
 296                         break;
 297
 298                 case 247:                                       /* stbux */
 299                         rs = get_rs(inst);
 300                         ra = get_ra(inst);
 301                         rb = get_rb(inst);
 302
 303                         ea = vcpu->arch.gpr[rb];
 304                         if (ra)
 305                                 ea += vcpu->arch.gpr[ra];
 306
 307                         emulated = kvmppc_handle_store(run, vcpu,
 308                                                        vcpu->arch.gpr[rs],
 309                                                        1, 1);
 310                         vcpu->arch.gpr[rs] = ea;
 311                         break;
 312
 313                 case 279:                                       /* lhzx */
 314                         rt = get_rt(inst);
 315                         emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
 316                         break;
 317
 318                 case 311:                                       /* lhzux */
 319                         rt = get_rt(inst);
 320                         ra = get_ra(inst);
 321                         rb = get_rb(inst);
 322
 323                         ea = vcpu->arch.gpr[rb];
 324                         if (ra)
 325                                 ea += vcpu->arch.gpr[ra];
 326
 327                         emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
 328                         vcpu->arch.gpr[ra] = ea;
 329                         break;
 330
 331                 case 323:                                       /* mfdcr */
 332                         dcrn = get_dcrn(inst);
 333                         rt = get_rt(inst);
 334
 335                         /* The guest may access CPR0 registers to determine the timebase
 336                          * frequency, and it must know the real host frequency because it
 337                          * can directly access the timebase registers.
 338                          *
 339                          * It would be possible to emulate those accesses in userspace,
 340                          * but userspace can really only figure out the end frequency.
 341                          * We could decompose that into the factors that compute it, but
 342                          * that's tricky math, and it's easier to just report the real
 343                          * CPR0 values.
 344                          */
 345                         switch (dcrn) {
 346                         case DCRN_CPR0_CONFIG_ADDR:
 347                                 vcpu->arch.gpr[rt] = vcpu->arch.cpr0_cfgaddr;
 348                                 break;
 349                         case DCRN_CPR0_CONFIG_DATA:
 350                                 local_irq_disable();
 351                                 mtdcr(DCRN_CPR0_CONFIG_ADDR,
 352                                       vcpu->arch.cpr0_cfgaddr);
 353                                 vcpu->arch.gpr[rt] = mfdcr(DCRN_CPR0_CONFIG_DATA);
 354                                 local_irq_enable();
 355                                 break;
 356                         default:
 357                                 run->dcr.dcrn = dcrn;
 358                                 run->dcr.data =  0;
 359                                 run->dcr.is_write = 0;
 360                                 vcpu->arch.io_gpr = rt;
 361                                 vcpu->arch.dcr_needed = 1;
 362                                 emulated = EMULATE_DO_DCR;
 363                         }
 364
 365                         break;
 366
 367                 case 339:                                       /* mfspr */
 368                         sprn = get_sprn(inst);
 369                         rt = get_rt(inst);
 370
 371                         switch (sprn) {
 372                         case SPRN_SRR0:
 373                                 vcpu->arch.gpr[rt] = vcpu->arch.srr0; break;
 374                         case SPRN_SRR1:
 375                                 vcpu->arch.gpr[rt] = vcpu->arch.srr1; break;
 376                         case SPRN_MMUCR:
 377                                 vcpu->arch.gpr[rt] = vcpu->arch.mmucr; break;
 378                         case SPRN_PID:
 379                                 vcpu->arch.gpr[rt] = vcpu->arch.pid; break;
 380                         case SPRN_IVPR:
 381                                 vcpu->arch.gpr[rt] = vcpu->arch.ivpr; break;
 382                         case SPRN_CCR0:
 383                                 vcpu->arch.gpr[rt] = vcpu->arch.ccr0; break;
 384                         case SPRN_CCR1:
 385                                 vcpu->arch.gpr[rt] = vcpu->arch.ccr1; break;
 386                         case SPRN_PVR:
 387                                 vcpu->arch.gpr[rt] = vcpu->arch.pvr; break;
 388                         case SPRN_DEAR:
 389                                 vcpu->arch.gpr[rt] = vcpu->arch.dear; break;
 390                         case SPRN_ESR:
 391                                 vcpu->arch.gpr[rt] = vcpu->arch.esr; break;
 392                         case SPRN_DBCR0:
 393                                 vcpu->arch.gpr[rt] = vcpu->arch.dbcr0; break;
 394                         case SPRN_DBCR1:
 395                                 vcpu->arch.gpr[rt] = vcpu->arch.dbcr1; break;
 396
 397                         /* Note: mftb and TBRL/TBWL are user-accessible, so
 398                          * the guest can always access the real TB anyways.
 399                          * In fact, we probably will never see these traps. */
 400                         case SPRN_TBWL:
 401                                 vcpu->arch.gpr[rt] = mftbl(); break;
 402                         case SPRN_TBWU:
 403                                 vcpu->arch.gpr[rt] = mftbu(); break;
 404
 405                         case SPRN_SPRG0:
 406                                 vcpu->arch.gpr[rt] = vcpu->arch.sprg0; break;
 407                         case SPRN_SPRG1:
 408                                 vcpu->arch.gpr[rt] = vcpu->arch.sprg1; break;
 409                         case SPRN_SPRG2:
 410                                 vcpu->arch.gpr[rt] = vcpu->arch.sprg2; break;
 411                         case SPRN_SPRG3:
 412                                 vcpu->arch.gpr[rt] = vcpu->arch.sprg3; break;
 413                         /* Note: SPRG4-7 are user-readable, so we don't get
 414                          * a trap. */
 415
 416                         case SPRN_IVOR0:
 417                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[0]; break;
 418                         case SPRN_IVOR1:
 419                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[1]; break;
 420                         case SPRN_IVOR2:
 421                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[2]; break;
 422                         case SPRN_IVOR3:
 423                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[3]; break;
 424                         case SPRN_IVOR4:
 425                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[4]; break;
 426                         case SPRN_IVOR5:
 427                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[5]; break;
 428                         case SPRN_IVOR6:
 429                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[6]; break;
 430                         case SPRN_IVOR7:
 431                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[7]; break;
 432                         case SPRN_IVOR8:
 433                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[8]; break;
 434                         case SPRN_IVOR9:
 435                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[9]; break;
 436                         case SPRN_IVOR10:
 437                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[10]; break;
 438                         case SPRN_IVOR11:
 439                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[11]; break;
 440                         case SPRN_IVOR12:
 441                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[12]; break;
 442                         case SPRN_IVOR13:
 443                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[13]; break;
 444                         case SPRN_IVOR14:
 445                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[14]; break;
 446                         case SPRN_IVOR15:
 447                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[15]; break;
 448
 449                         default:
 450                                 printk("mfspr: unknown spr %x\n", sprn);
 451                                 vcpu->arch.gpr[rt] = 0;
 452                                 break;
 453                         }
 454                         break;
 455
 456                 case 407:                                       /* sthx */
 457                         rs = get_rs(inst);
 458                         ra = get_ra(inst);
 459                         rb = get_rb(inst);
 460
 461                         emulated = kvmppc_handle_store(run, vcpu,
 462                                                        vcpu->arch.gpr[rs],
 463                                                        2, 1);
 464                         break;
 465
 466                 case 439:                                       /* sthux */
 467                         rs = get_rs(inst);
 468                         ra = get_ra(inst);
 469                         rb = get_rb(inst);
 470
 471                         ea = vcpu->arch.gpr[rb];
 472                         if (ra)
 473                                 ea += vcpu->arch.gpr[ra];
 474
 475                         emulated = kvmppc_handle_store(run, vcpu,
 476                                                        vcpu->arch.gpr[rs],
 477                                                        2, 1);
 478                         vcpu->arch.gpr[ra] = ea;
 479                         break;
 480
 481                 case 451:                                       /* mtdcr */
 482                         dcrn = get_dcrn(inst);
 483                         rs = get_rs(inst);
 484
 485                         /* emulate some access in kernel */
 486                         switch (dcrn) {
 487                         case DCRN_CPR0_CONFIG_ADDR:
 488                                 vcpu->arch.cpr0_cfgaddr = vcpu->arch.gpr[rs];
 489                                 break;
 490                         default:
 491                                 run->dcr.dcrn = dcrn;
 492                                 run->dcr.data = vcpu->arch.gpr[rs];
 493                                 run->dcr.is_write = 1;
 494                                 vcpu->arch.dcr_needed = 1;
 495                                 emulated = EMULATE_DO_DCR;
 496                         }
 497
 498                         break;
 499
 500                 case 467:                                       /* mtspr */
 501                         sprn = get_sprn(inst);
 502                         rs = get_rs(inst);
 503                         switch (sprn) {
 504                         case SPRN_SRR0:
 505                                 vcpu->arch.srr0 = vcpu->arch.gpr[rs]; break;
 506                         case SPRN_SRR1:
 507                                 vcpu->arch.srr1 = vcpu->arch.gpr[rs]; break;
 508                         case SPRN_MMUCR:
 509                                 vcpu->arch.mmucr = vcpu->arch.gpr[rs]; break;
 510                         case SPRN_PID:
 511                                 kvmppc_set_pid(vcpu, vcpu->arch.gpr[rs]); break;
 512                         case SPRN_CCR0:
 513                                 vcpu->arch.ccr0 = vcpu->arch.gpr[rs]; break;
 514                         case SPRN_CCR1:
 515                                 vcpu->arch.ccr1 = vcpu->arch.gpr[rs]; break;
 516                         case SPRN_DEAR:
 517                                 vcpu->arch.dear = vcpu->arch.gpr[rs]; break;
 518                         case SPRN_ESR:
 519                                 vcpu->arch.esr = vcpu->arch.gpr[rs]; break;
 520                         case SPRN_DBCR0:
 521                                 vcpu->arch.dbcr0 = vcpu->arch.gpr[rs]; break;
 522                         case SPRN_DBCR1:
 523                                 vcpu->arch.dbcr1 = vcpu->arch.gpr[rs]; break;
 524
 525                         /* XXX We need to context-switch the timebase for
 526                          * watchdog and FIT. */
 527                         case SPRN_TBWL: break;
 528                         case SPRN_TBWU: break;
 529
 530                         case SPRN_DEC:
 531                                 vcpu->arch.dec = vcpu->arch.gpr[rs];
 532                                 kvmppc_emulate_dec(vcpu);
 533                                 break;
 534
 535                         case SPRN_TSR:
 536                                 vcpu->arch.tsr &= ~vcpu->arch.gpr[rs]; break;
 537
 538                         case SPRN_TCR:
 539                                 vcpu->arch.tcr = vcpu->arch.gpr[rs];
 540                                 kvmppc_emulate_dec(vcpu);
 541                                 break;
 542
 543                         case SPRN_SPRG0:
 544                                 vcpu->arch.sprg0 = vcpu->arch.gpr[rs]; break;
 545                         case SPRN_SPRG1:
 546                                 vcpu->arch.sprg1 = vcpu->arch.gpr[rs]; break;
 547                         case SPRN_SPRG2:
 548                                 vcpu->arch.sprg2 = vcpu->arch.gpr[rs]; break;
 549                         case SPRN_SPRG3:
 550                                 vcpu->arch.sprg3 = vcpu->arch.gpr[rs]; break;
 551
 552                         /* Note: SPRG4-7 are user-readable. These values are
 553                          * loaded into the real SPRGs when resuming the
 554                          * guest. */
 555                         case SPRN_SPRG4:
 556                                 vcpu->arch.sprg4 = vcpu->arch.gpr[rs]; break;
 557                         case SPRN_SPRG5:
 558                                 vcpu->arch.sprg5 = vcpu->arch.gpr[rs]; break;
 559                         case SPRN_SPRG6:
 560                                 vcpu->arch.sprg6 = vcpu->arch.gpr[rs]; break;
 561                         case SPRN_SPRG7:
 562                                 vcpu->arch.sprg7 = vcpu->arch.gpr[rs]; break;
 563
 564                         case SPRN_IVPR:
 565                                 vcpu->arch.ivpr = vcpu->arch.gpr[rs]; break;
 566                         case SPRN_IVOR0:
 567                                 vcpu->arch.ivor[0] = vcpu->arch.gpr[rs]; break;
 568                         case SPRN_IVOR1:
 569                                 vcpu->arch.ivor[1] = vcpu->arch.gpr[rs]; break;
 570                         case SPRN_IVOR2:
 571                                 vcpu->arch.ivor[2] = vcpu->arch.gpr[rs]; break;
 572                         case SPRN_IVOR3:
 573                                 vcpu->arch.ivor[3] = vcpu->arch.gpr[rs]; break;
 574                         case SPRN_IVOR4:
 575                                 vcpu->arch.ivor[4] = vcpu->arch.gpr[rs]; break;
 576                         case SPRN_IVOR5:
 577                                 vcpu->arch.ivor[5] = vcpu->arch.gpr[rs]; break;
 578                         case SPRN_IVOR6:
 579                                 vcpu->arch.ivor[6] = vcpu->arch.gpr[rs]; break;
 580                         case SPRN_IVOR7:
 581                                 vcpu->arch.ivor[7] = vcpu->arch.gpr[rs]; break;
 582                         case SPRN_IVOR8:
 583                                 vcpu->arch.ivor[8] = vcpu->arch.gpr[rs]; break;
 584                         case SPRN_IVOR9:
 585                                 vcpu->arch.ivor[9] = vcpu->arch.gpr[rs]; break;
 586                         case SPRN_IVOR10:
 587                                 vcpu->arch.ivor[10] = vcpu->arch.gpr[rs]; break;
 588                         case SPRN_IVOR11:
 589                                 vcpu->arch.ivor[11] = vcpu->arch.gpr[rs]; break;
 590                         case SPRN_IVOR12:
 591                                 vcpu->arch.ivor[12] = vcpu->arch.gpr[rs]; break;
 592                         case SPRN_IVOR13:
 593                                 vcpu->arch.ivor[13] = vcpu->arch.gpr[rs]; break;
 594                         case SPRN_IVOR14:
 595                                 vcpu->arch.ivor[14] = vcpu->arch.gpr[rs]; break;
 596                         case SPRN_IVOR15:
 597                                 vcpu->arch.ivor[15] = vcpu->arch.gpr[rs]; break;
 598
 599                         default:
 600                                 printk("mtspr: unknown spr %x\n", sprn);
 601                                 emulated = EMULATE_FAIL;
 602                                 break;
 603                         }
 604                         break;
 605
 606                 case 470:                                       /* dcbi */
 607                         /* Do nothing. The guest is performing dcbi because
 608                          * hardware DMA is not snooped by the dcache, but
 609                          * emulated DMA either goes through the dcache as
 610                          * normal writes, or the host kernel has handled dcache
 611                          * coherence. */
 612                         break;
 613
 614                 case 534:                                       /* lwbrx */
 615                         rt = get_rt(inst);
 616                         emulated = kvmppc_handle_load(run, vcpu, rt, 4, 0);
 617                         break;
 618
 619                 case 566:                                       /* tlbsync */
 620                         break;
 621
 622                 case 662:                                       /* stwbrx */
 623                         rs = get_rs(inst);
 624                         ra = get_ra(inst);
 625                         rb = get_rb(inst);
 626
 627                         emulated = kvmppc_handle_store(run, vcpu,
 628                                                        vcpu->arch.gpr[rs],
 629                                                        4, 0);
 630                         break;
 631
 632                 case 978:                                       /* tlbwe */
 633                         emulated = kvmppc_emul_tlbwe(vcpu, inst);
 634                         break;
 635
 636                 case 914:       {                               /* tlbsx */
 637                         int index;
 638                         unsigned int as = get_mmucr_sts(vcpu);
 639                         unsigned int pid = get_mmucr_stid(vcpu);
 640
 641                         rt = get_rt(inst);
 642                         ra = get_ra(inst);
 643                         rb = get_rb(inst);
 644                         rc = get_rc(inst);
 645
 646                         ea = vcpu->arch.gpr[rb];
 647                         if (ra)
 648                                 ea += vcpu->arch.gpr[ra];
 649
 650                         index = kvmppc_44x_tlb_index(vcpu, ea, pid, as);
 651                         if (rc) {
 652                                 if (index < 0)
 653                                         vcpu->arch.cr &= ~0x20000000;
 654                                 else
 655                                         vcpu->arch.cr |= 0x20000000;
 656                         }
 657                         vcpu->arch.gpr[rt] = index;
 658
 659                         }
 660                         break;
 661
 662                 case 790:                                       /* lhbrx */
 663                         rt = get_rt(inst);
 664                         emulated = kvmppc_handle_load(run, vcpu, rt, 2, 0);
 665                         break;
 666
 667                 case 918:                                       /* sthbrx */
 668                         rs = get_rs(inst);
 669                         ra = get_ra(inst);
 670                         rb = get_rb(inst);
 671
 672                         emulated = kvmppc_handle_store(run, vcpu,
 673                                                        vcpu->arch.gpr[rs],
 674                                                        2, 0);
 675                         break;
 676
 677                 case 966:                                       /* iccci */
 678                         break;
 679
 680                 default:
 681                         printk("unknown: op %d xop %d\n", get_op(inst),
 682                                 get_xop(inst));
 683                         emulated = EMULATE_FAIL;
 684                         break;
 685                 }
 686                 break;
 687
 688         case 32:                                                /* lwz */
 689                 rt = get_rt(inst);
 690                 emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
 691                 break;
 692
 693         case 33:                                                /* lwzu */
 694                 ra = get_ra(inst);
 695                 rt = get_rt(inst);
 696                 emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
 697                 vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
 698                 break;
 699
 700         case 34:                                                /* lbz */
 701                 rt = get_rt(inst);
 702                 emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
 703                 break;
 704
 705         case 35:                                                /* lbzu */
 706                 ra = get_ra(inst);
 707                 rt = get_rt(inst);
 708                 emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
 709                 vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
 710                 break;
 711
 712         case 36:                                                /* stw */
 713                 rs = get_rs(inst);
 714                 emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
 715                                                4, 1);
 716                 break;
 717
 718         case 37:                                                /* stwu */
 719                 ra = get_ra(inst);
 720                 rs = get_rs(inst);
 721                 emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
 722                                                4, 1);
 723                 vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
 724                 break;
 725
 726         case 38:                                                /* stb */
 727                 rs = get_rs(inst);
 728                 emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
 729                                                1, 1);
 730                 break;
 731
 732         case 39:                                                /* stbu */
 733                 ra = get_ra(inst);
 734                 rs = get_rs(inst);
 735                 emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
 736                                                1, 1);
 737                 vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
 738                 break;
 739
 740         case 40:                                                /* lhz */
 741                 rt = get_rt(inst);
 742                 emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
 743                 break;
 744
 745         case 41:                                                /* lhzu */
 746                 ra = get_ra(inst);
 747                 rt = get_rt(inst);
 748                 emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
 749                 vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
 750                 break;
 751
 752         case 44:                                                /* sth */
 753                 rs = get_rs(inst);
 754                 emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
 755                                                2, 1);
 756                 break;
 757
 758         case 45:                                                /* sthu */
 759                 ra = get_ra(inst);
 760                 rs = get_rs(inst);
 761                 emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
 762                                                2, 1);
 763                 vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
 764                 break;
 765
 766         default:
 767                 printk("unknown op %d\n", get_op(inst));
 768                 emulated = EMULATE_FAIL;
 769                 break;
 770         }
 771
 772         KVMTRACE_3D(PPC_INSTR, vcpu, inst, vcpu->arch.pc, emulated, entryexit);
 773
 774         if (advance)
 775                 vcpu->arch.pc += 4; /* Advance past emulated instruction. */
 776
 777         return emulated;
 778 }