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 /* Instruction decoding */
  33 static inline unsigned int get_op(u32 inst)
  34 {
  35         return inst >> 26;
  36 }
  37
  38 static inline unsigned int get_xop(u32 inst)
  39 {
  40         return (inst >> 1) & 0x3ff;
  41 }
  42
  43 static inline unsigned int get_sprn(u32 inst)
  44 {
  45         return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
  46 }
  47
  48 static inline unsigned int get_dcrn(u32 inst)
  49 {
  50         return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
  51 }
  52
  53 static inline unsigned int get_rt(u32 inst)
  54 {
  55         return (inst >> 21) & 0x1f;
  56 }
  57
  58 static inline unsigned int get_rs(u32 inst)
  59 {
  60         return (inst >> 21) & 0x1f;
  61 }
  62
  63 static inline unsigned int get_ra(u32 inst)
  64 {
  65         return (inst >> 16) & 0x1f;
  66 }
  67
  68 static inline unsigned int get_rb(u32 inst)
  69 {
  70         return (inst >> 11) & 0x1f;
  71 }
  72
  73 static inline unsigned int get_rc(u32 inst)
  74 {
  75         return inst & 0x1;
  76 }
  77
  78 static inline unsigned int get_ws(u32 inst)
  79 {
  80         return (inst >> 11) & 0x1f;
  81 }
  82
  83 static inline unsigned int get_d(u32 inst)
  84 {
  85         return inst & 0xffff;
  86 }
  87
  88 static void kvmppc_emulate_dec(struct kvm_vcpu *vcpu)
  89 {
  90         if (vcpu->arch.tcr & TCR_DIE) {
  91                 /* The decrementer ticks at the same rate as the timebase, so
  92                  * that's how we convert the guest DEC value to the number of
  93                  * host ticks. */
  94                 unsigned long nr_jiffies;
  95
  96                 nr_jiffies = vcpu->arch.dec / tb_ticks_per_jiffy;
  97                 mod_timer(&vcpu->arch.dec_timer,
  98                           get_jiffies_64() + nr_jiffies);
  99         } else {
 100                 del_timer(&vcpu->arch.dec_timer);
 101         }
 102 }
 103
 104 static void kvmppc_emul_rfi(struct kvm_vcpu *vcpu)
 105 {
 106         vcpu->arch.pc = vcpu->arch.srr0;
 107         kvmppc_set_msr(vcpu, vcpu->arch.srr1);
 108 }
 109
 110 /* XXX to do:
 111  * lhax
 112  * lhaux
 113  * lswx
 114  * lswi
 115  * stswx
 116  * stswi
 117  * lha
 118  * lhau
 119  * lmw
 120  * stmw
 121  *
 122  * XXX is_bigendian should depend on MMU mapping or MSR[LE]
 123  */
 124 int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
 125 {
 126         u32 inst = vcpu->arch.last_inst;
 127         u32 ea;
 128         int ra;
 129         int rb;
 130         int rc;
 131         int rs;
 132         int rt;
 133         int ws;
 134         int sprn;
 135         int dcrn;
 136         enum emulation_result emulated = EMULATE_DONE;
 137         int advance = 1;
 138
 139         switch (get_op(inst)) {
 140         case 3:                                                 /* trap */
 141                 printk("trap!\n");
 142                 kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_PROGRAM);
 143                 advance = 0;
 144                 break;
 145
 146         case 19:
 147                 switch (get_xop(inst)) {
 148                 case 50:                                        /* rfi */
 149                         kvmppc_emul_rfi(vcpu);
 150                         advance = 0;
 151                         break;
 152
 153                 default:
 154                         emulated = EMULATE_FAIL;
 155                         break;
 156                 }
 157                 break;
 158
 159         case 31:
 160                 switch (get_xop(inst)) {
 161
 162                 case 23:                                        /* lwzx */
 163                         rt = get_rt(inst);
 164                         emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
 165                         break;
 166
 167                 case 83:                                        /* mfmsr */
 168                         rt = get_rt(inst);
 169                         vcpu->arch.gpr[rt] = vcpu->arch.msr;
 170                         break;
 171
 172                 case 87:                                        /* lbzx */
 173                         rt = get_rt(inst);
 174                         emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
 175                         break;
 176
 177                 case 131:                                       /* wrtee */
 178                         rs = get_rs(inst);
 179                         vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
 180                                          | (vcpu->arch.gpr[rs] & MSR_EE);
 181                         break;
 182
 183                 case 146:                                       /* mtmsr */
 184                         rs = get_rs(inst);
 185                         kvmppc_set_msr(vcpu, vcpu->arch.gpr[rs]);
 186                         break;
 187
 188                 case 151:                                       /* stwx */
 189                         rs = get_rs(inst);
 190                         emulated = kvmppc_handle_store(run, vcpu,
 191                                                        vcpu->arch.gpr[rs],
 192                                                        4, 1);
 193                         break;
 194
 195                 case 163:                                       /* wrteei */
 196                         vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
 197                                          | (inst & MSR_EE);
 198                         break;
 199
 200                 case 215:                                       /* stbx */
 201                         rs = get_rs(inst);
 202                         emulated = kvmppc_handle_store(run, vcpu,
 203                                                        vcpu->arch.gpr[rs],
 204                                                        1, 1);
 205                         break;
 206
 207                 case 247:                                       /* stbux */
 208                         rs = get_rs(inst);
 209                         ra = get_ra(inst);
 210                         rb = get_rb(inst);
 211
 212                         ea = vcpu->arch.gpr[rb];
 213                         if (ra)
 214                                 ea += vcpu->arch.gpr[ra];
 215
 216                         emulated = kvmppc_handle_store(run, vcpu,
 217                                                        vcpu->arch.gpr[rs],
 218                                                        1, 1);
 219                         vcpu->arch.gpr[rs] = ea;
 220                         break;
 221
 222                 case 279:                                       /* lhzx */
 223                         rt = get_rt(inst);
 224                         emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
 225                         break;
 226
 227                 case 311:                                       /* lhzux */
 228                         rt = get_rt(inst);
 229                         ra = get_ra(inst);
 230                         rb = get_rb(inst);
 231
 232                         ea = vcpu->arch.gpr[rb];
 233                         if (ra)
 234                                 ea += vcpu->arch.gpr[ra];
 235
 236                         emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
 237                         vcpu->arch.gpr[ra] = ea;
 238                         break;
 239
 240                 case 323:                                       /* mfdcr */
 241                         dcrn = get_dcrn(inst);
 242                         rt = get_rt(inst);
 243
 244                         /* The guest may access CPR0 registers to determine the timebase
 245                          * frequency, and it must know the real host frequency because it
 246                          * can directly access the timebase registers.
 247                          *
 248                          * It would be possible to emulate those accesses in userspace,
 249                          * but userspace can really only figure out the end frequency.
 250                          * We could decompose that into the factors that compute it, but
 251                          * that's tricky math, and it's easier to just report the real
 252                          * CPR0 values.
 253                          */
 254                         switch (dcrn) {
 255                         case DCRN_CPR0_CONFIG_ADDR:
 256                                 vcpu->arch.gpr[rt] = vcpu->arch.cpr0_cfgaddr;
 257                                 break;
 258                         case DCRN_CPR0_CONFIG_DATA:
 259                                 local_irq_disable();
 260                                 mtdcr(DCRN_CPR0_CONFIG_ADDR,
 261                                       vcpu->arch.cpr0_cfgaddr);
 262                                 vcpu->arch.gpr[rt] = mfdcr(DCRN_CPR0_CONFIG_DATA);
 263                                 local_irq_enable();
 264                                 break;
 265                         default:
 266                                 run->dcr.dcrn = dcrn;
 267                                 run->dcr.data =  0;
 268                                 run->dcr.is_write = 0;
 269                                 vcpu->arch.io_gpr = rt;
 270                                 vcpu->arch.dcr_needed = 1;
 271                                 emulated = EMULATE_DO_DCR;
 272                         }
 273
 274                         break;
 275
 276                 case 339:                                       /* mfspr */
 277                         sprn = get_sprn(inst);
 278                         rt = get_rt(inst);
 279
 280                         switch (sprn) {
 281                         case SPRN_SRR0:
 282                                 vcpu->arch.gpr[rt] = vcpu->arch.srr0; break;
 283                         case SPRN_SRR1:
 284                                 vcpu->arch.gpr[rt] = vcpu->arch.srr1; break;
 285                         case SPRN_MMUCR:
 286                                 vcpu->arch.gpr[rt] = vcpu->arch.mmucr; break;
 287                         case SPRN_PID:
 288                                 vcpu->arch.gpr[rt] = vcpu->arch.pid; break;
 289                         case SPRN_IVPR:
 290                                 vcpu->arch.gpr[rt] = vcpu->arch.ivpr; break;
 291                         case SPRN_CCR0:
 292                                 vcpu->arch.gpr[rt] = vcpu->arch.ccr0; break;
 293                         case SPRN_CCR1:
 294                                 vcpu->arch.gpr[rt] = vcpu->arch.ccr1; break;
 295                         case SPRN_PVR:
 296                                 vcpu->arch.gpr[rt] = vcpu->arch.pvr; break;
 297                         case SPRN_DEAR:
 298                                 vcpu->arch.gpr[rt] = vcpu->arch.dear; break;
 299                         case SPRN_ESR:
 300                                 vcpu->arch.gpr[rt] = vcpu->arch.esr; break;
 301                         case SPRN_DBCR0:
 302                                 vcpu->arch.gpr[rt] = vcpu->arch.dbcr0; break;
 303                         case SPRN_DBCR1:
 304                                 vcpu->arch.gpr[rt] = vcpu->arch.dbcr1; break;
 305
 306                         /* Note: mftb and TBRL/TBWL are user-accessible, so
 307                          * the guest can always access the real TB anyways.
 308                          * In fact, we probably will never see these traps. */
 309                         case SPRN_TBWL:
 310                                 vcpu->arch.gpr[rt] = mftbl(); break;
 311                         case SPRN_TBWU:
 312                                 vcpu->arch.gpr[rt] = mftbu(); break;
 313
 314                         case SPRN_SPRG0:
 315                                 vcpu->arch.gpr[rt] = vcpu->arch.sprg0; break;
 316                         case SPRN_SPRG1:
 317                                 vcpu->arch.gpr[rt] = vcpu->arch.sprg1; break;
 318                         case SPRN_SPRG2:
 319                                 vcpu->arch.gpr[rt] = vcpu->arch.sprg2; break;
 320                         case SPRN_SPRG3:
 321                                 vcpu->arch.gpr[rt] = vcpu->arch.sprg3; break;
 322                         /* Note: SPRG4-7 are user-readable, so we don't get
 323                          * a trap. */
 324
 325                         case SPRN_IVOR0:
 326                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[0]; break;
 327                         case SPRN_IVOR1:
 328                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[1]; break;
 329                         case SPRN_IVOR2:
 330                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[2]; break;
 331                         case SPRN_IVOR3:
 332                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[3]; break;
 333                         case SPRN_IVOR4:
 334                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[4]; break;
 335                         case SPRN_IVOR5:
 336                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[5]; break;
 337                         case SPRN_IVOR6:
 338                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[6]; break;
 339                         case SPRN_IVOR7:
 340                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[7]; break;
 341                         case SPRN_IVOR8:
 342                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[8]; break;
 343                         case SPRN_IVOR9:
 344                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[9]; break;
 345                         case SPRN_IVOR10:
 346                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[10]; break;
 347                         case SPRN_IVOR11:
 348                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[11]; break;
 349                         case SPRN_IVOR12:
 350                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[12]; break;
 351                         case SPRN_IVOR13:
 352                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[13]; break;
 353                         case SPRN_IVOR14:
 354                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[14]; break;
 355                         case SPRN_IVOR15:
 356                                 vcpu->arch.gpr[rt] = vcpu->arch.ivor[15]; break;
 357
 358                         default:
 359                                 printk("mfspr: unknown spr %x\n", sprn);
 360                                 vcpu->arch.gpr[rt] = 0;
 361                                 break;
 362                         }
 363                         break;
 364
 365                 case 407:                                       /* sthx */
 366                         rs = get_rs(inst);
 367                         ra = get_ra(inst);
 368                         rb = get_rb(inst);
 369
 370                         emulated = kvmppc_handle_store(run, vcpu,
 371                                                        vcpu->arch.gpr[rs],
 372                                                        2, 1);
 373                         break;
 374
 375                 case 439:                                       /* sthux */
 376                         rs = get_rs(inst);
 377                         ra = get_ra(inst);
 378                         rb = get_rb(inst);
 379
 380                         ea = vcpu->arch.gpr[rb];
 381                         if (ra)
 382                                 ea += vcpu->arch.gpr[ra];
 383
 384                         emulated = kvmppc_handle_store(run, vcpu,
 385                                                        vcpu->arch.gpr[rs],
 386                                                        2, 1);
 387                         vcpu->arch.gpr[ra] = ea;
 388                         break;
 389
 390                 case 451:                                       /* mtdcr */
 391                         dcrn = get_dcrn(inst);
 392                         rs = get_rs(inst);
 393
 394                         /* emulate some access in kernel */
 395                         switch (dcrn) {
 396                         case DCRN_CPR0_CONFIG_ADDR:
 397                                 vcpu->arch.cpr0_cfgaddr = vcpu->arch.gpr[rs];
 398                                 break;
 399                         default:
 400                                 run->dcr.dcrn = dcrn;
 401                                 run->dcr.data = vcpu->arch.gpr[rs];
 402                                 run->dcr.is_write = 1;
 403                                 vcpu->arch.dcr_needed = 1;
 404                                 emulated = EMULATE_DO_DCR;
 405                         }
 406
 407                         break;
 408
 409                 case 467:                                       /* mtspr */
 410                         sprn = get_sprn(inst);
 411                         rs = get_rs(inst);
 412                         switch (sprn) {
 413                         case SPRN_SRR0:
 414                                 vcpu->arch.srr0 = vcpu->arch.gpr[rs]; break;
 415                         case SPRN_SRR1:
 416                                 vcpu->arch.srr1 = vcpu->arch.gpr[rs]; break;
 417                         case SPRN_MMUCR:
 418                                 vcpu->arch.mmucr = vcpu->arch.gpr[rs]; break;
 419                         case SPRN_PID:
 420                                 kvmppc_set_pid(vcpu, vcpu->arch.gpr[rs]); break;
 421                         case SPRN_CCR0:
 422                                 vcpu->arch.ccr0 = vcpu->arch.gpr[rs]; break;
 423                         case SPRN_CCR1:
 424                                 vcpu->arch.ccr1 = vcpu->arch.gpr[rs]; break;
 425                         case SPRN_DEAR:
 426                                 vcpu->arch.dear = vcpu->arch.gpr[rs]; break;
 427                         case SPRN_ESR:
 428                                 vcpu->arch.esr = vcpu->arch.gpr[rs]; break;
 429                         case SPRN_DBCR0:
 430                                 vcpu->arch.dbcr0 = vcpu->arch.gpr[rs]; break;
 431                         case SPRN_DBCR1:
 432                                 vcpu->arch.dbcr1 = vcpu->arch.gpr[rs]; break;
 433
 434                         /* XXX We need to context-switch the timebase for
 435                          * watchdog and FIT. */
 436                         case SPRN_TBWL: break;
 437                         case SPRN_TBWU: break;
 438
 439                         case SPRN_DEC:
 440                                 vcpu->arch.dec = vcpu->arch.gpr[rs];
 441                                 kvmppc_emulate_dec(vcpu);
 442                                 break;
 443
 444                         case SPRN_TSR:
 445                                 vcpu->arch.tsr &= ~vcpu->arch.gpr[rs]; break;
 446
 447                         case SPRN_TCR:
 448                                 vcpu->arch.tcr = vcpu->arch.gpr[rs];
 449                                 kvmppc_emulate_dec(vcpu);
 450                                 break;
 451
 452                         case SPRN_SPRG0:
 453                                 vcpu->arch.sprg0 = vcpu->arch.gpr[rs]; break;
 454                         case SPRN_SPRG1:
 455                                 vcpu->arch.sprg1 = vcpu->arch.gpr[rs]; break;
 456                         case SPRN_SPRG2:
 457                                 vcpu->arch.sprg2 = vcpu->arch.gpr[rs]; break;
 458                         case SPRN_SPRG3:
 459                                 vcpu->arch.sprg3 = vcpu->arch.gpr[rs]; break;
 460
 461                         /* Note: SPRG4-7 are user-readable. These values are
 462                          * loaded into the real SPRGs when resuming the
 463                          * guest. */
 464                         case SPRN_SPRG4:
 465                                 vcpu->arch.sprg4 = vcpu->arch.gpr[rs]; break;
 466                         case SPRN_SPRG5:
 467                                 vcpu->arch.sprg5 = vcpu->arch.gpr[rs]; break;
 468                         case SPRN_SPRG6:
 469                                 vcpu->arch.sprg6 = vcpu->arch.gpr[rs]; break;
 470                         case SPRN_SPRG7:
 471                                 vcpu->arch.sprg7 = vcpu->arch.gpr[rs]; break;
 472
 473                         case SPRN_IVPR:
 474                                 vcpu->arch.ivpr = vcpu->arch.gpr[rs]; break;
 475                         case SPRN_IVOR0:
 476                                 vcpu->arch.ivor[0] = vcpu->arch.gpr[rs]; break;
 477                         case SPRN_IVOR1:
 478                                 vcpu->arch.ivor[1] = vcpu->arch.gpr[rs]; break;
 479                         case SPRN_IVOR2:
 480                                 vcpu->arch.ivor[2] = vcpu->arch.gpr[rs]; break;
 481                         case SPRN_IVOR3:
 482                                 vcpu->arch.ivor[3] = vcpu->arch.gpr[rs]; break;
 483                         case SPRN_IVOR4:
 484                                 vcpu->arch.ivor[4] = vcpu->arch.gpr[rs]; break;
 485                         case SPRN_IVOR5:
 486                                 vcpu->arch.ivor[5] = vcpu->arch.gpr[rs]; break;
 487                         case SPRN_IVOR6:
 488                                 vcpu->arch.ivor[6] = vcpu->arch.gpr[rs]; break;
 489                         case SPRN_IVOR7:
 490                                 vcpu->arch.ivor[7] = vcpu->arch.gpr[rs]; break;
 491                         case SPRN_IVOR8:
 492                                 vcpu->arch.ivor[8] = vcpu->arch.gpr[rs]; break;
 493                         case SPRN_IVOR9:
 494                                 vcpu->arch.ivor[9] = vcpu->arch.gpr[rs]; break;
 495                         case SPRN_IVOR10:
 496                                 vcpu->arch.ivor[10] = vcpu->arch.gpr[rs]; break;
 497                         case SPRN_IVOR11:
 498                                 vcpu->arch.ivor[11] = vcpu->arch.gpr[rs]; break;
 499                         case SPRN_IVOR12:
 500                                 vcpu->arch.ivor[12] = vcpu->arch.gpr[rs]; break;
 501                         case SPRN_IVOR13:
 502                                 vcpu->arch.ivor[13] = vcpu->arch.gpr[rs]; break;
 503                         case SPRN_IVOR14:
 504                                 vcpu->arch.ivor[14] = vcpu->arch.gpr[rs]; break;
 505                         case SPRN_IVOR15:
 506                                 vcpu->arch.ivor[15] = vcpu->arch.gpr[rs]; break;
 507
 508                         default:
 509                                 printk("mtspr: unknown spr %x\n", sprn);
 510                                 emulated = EMULATE_FAIL;
 511                                 break;
 512                         }
 513                         break;
 514
 515                 case 470:                                       /* dcbi */
 516                         /* Do nothing. The guest is performing dcbi because
 517                          * hardware DMA is not snooped by the dcache, but
 518                          * emulated DMA either goes through the dcache as
 519                          * normal writes, or the host kernel has handled dcache
 520                          * coherence. */
 521                         break;
 522
 523                 case 534:                                       /* lwbrx */
 524                         rt = get_rt(inst);
 525                         emulated = kvmppc_handle_load(run, vcpu, rt, 4, 0);
 526                         break;
 527
 528                 case 566:                                       /* tlbsync */
 529                         break;
 530
 531                 case 662:                                       /* stwbrx */
 532                         rs = get_rs(inst);
 533                         ra = get_ra(inst);
 534                         rb = get_rb(inst);
 535
 536                         emulated = kvmppc_handle_store(run, vcpu,
 537                                                        vcpu->arch.gpr[rs],
 538                                                        4, 0);
 539                         break;
 540
 541                 case 978:                                       /* tlbwe */
 542                         ra = get_ra(inst);
 543                         rs = get_rs(inst);
 544                         ws = get_ws(inst);
 545                         emulated = kvmppc_emul_tlbwe(vcpu, ra, rs, ws);
 546                         break;
 547
 548                 case 914:                                       /* tlbsx */
 549                         rt = get_rt(inst);
 550                         ra = get_ra(inst);
 551                         rb = get_rb(inst);
 552                         rc = get_rc(inst);
 553                         emulated = kvmppc_emul_tlbsx(vcpu, rt, ra, rb, rc);
 554                         break;
 555
 556                 case 790:                                       /* lhbrx */
 557                         rt = get_rt(inst);
 558                         emulated = kvmppc_handle_load(run, vcpu, rt, 2, 0);
 559                         break;
 560
 561                 case 918:                                       /* sthbrx */
 562                         rs = get_rs(inst);
 563                         ra = get_ra(inst);
 564                         rb = get_rb(inst);
 565
 566                         emulated = kvmppc_handle_store(run, vcpu,
 567                                                        vcpu->arch.gpr[rs],
 568                                                        2, 0);
 569                         break;
 570
 571                 case 966:                                       /* iccci */
 572                         break;
 573
 574                 default:
 575                         printk("unknown: op %d xop %d\n", get_op(inst),
 576                                 get_xop(inst));
 577                         emulated = EMULATE_FAIL;
 578                         break;
 579                 }
 580                 break;
 581
 582         case 32:                                                /* lwz */
 583                 rt = get_rt(inst);
 584                 emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
 585                 break;
 586
 587         case 33:                                                /* lwzu */
 588                 ra = get_ra(inst);
 589                 rt = get_rt(inst);
 590                 emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
 591                 vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
 592                 break;
 593
 594         case 34:                                                /* lbz */
 595                 rt = get_rt(inst);
 596                 emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
 597                 break;
 598
 599         case 35:                                                /* lbzu */
 600                 ra = get_ra(inst);
 601                 rt = get_rt(inst);
 602                 emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
 603                 vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
 604                 break;
 605
 606         case 36:                                                /* stw */
 607                 rs = get_rs(inst);
 608                 emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
 609                                                4, 1);
 610                 break;
 611
 612         case 37:                                                /* stwu */
 613                 ra = get_ra(inst);
 614                 rs = get_rs(inst);
 615                 emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
 616                                                4, 1);
 617                 vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
 618                 break;
 619
 620         case 38:                                                /* stb */
 621                 rs = get_rs(inst);
 622                 emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
 623                                                1, 1);
 624                 break;
 625
 626         case 39:                                                /* stbu */
 627                 ra = get_ra(inst);
 628                 rs = get_rs(inst);
 629                 emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
 630                                                1, 1);
 631                 vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
 632                 break;
 633
 634         case 40:                                                /* lhz */
 635                 rt = get_rt(inst);
 636                 emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
 637                 break;
 638
 639         case 41:                                                /* lhzu */
 640                 ra = get_ra(inst);
 641                 rt = get_rt(inst);
 642                 emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
 643                 vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
 644                 break;
 645
 646         case 44:                                                /* sth */
 647                 rs = get_rs(inst);
 648                 emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
 649                                                2, 1);
 650                 break;
 651
 652         case 45:                                                /* sthu */
 653                 ra = get_ra(inst);
 654                 rs = get_rs(inst);
 655                 emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
 656                                                2, 1);
 657                 vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
 658                 break;
 659
 660         default:
 661                 printk("unknown op %d\n", get_op(inst));
 662                 emulated = EMULATE_FAIL;
 663                 break;
 664         }
 665
 666         KVMTRACE_3D(PPC_INSTR, vcpu, inst, vcpu->arch.pc, emulated, entryexit);
 667
 668         if (advance)
 669                 vcpu->arch.pc += 4; /* Advance past emulated instruction. */
 670
 671         return emulated;
 672 }