arch/powerpc/kvm/book3s_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 SUSE Linux Products GmbH 2009
  16  *
  17  * Authors: Alexander Graf <agraf@suse.de>
  18  */
  19
  20 #include <asm/kvm_ppc.h>
  21 #include <asm/disassemble.h>
  22 #include <asm/kvm_book3s.h>
  23 #include <asm/reg.h>
  24 #include <asm/switch_to.h>
  25 #include <asm/time.h>
  26
  27 #define OP_19_XOP_RFID          18
  28 #define OP_19_XOP_RFI           50
  29
  30 #define OP_31_XOP_MFMSR         83
  31 #define OP_31_XOP_MTMSR         146
  32 #define OP_31_XOP_MTMSRD        178
  33 #define OP_31_XOP_MTSR          210
  34 #define OP_31_XOP_MTSRIN        242
  35 #define OP_31_XOP_TLBIEL        274
  36 #define OP_31_XOP_TLBIE         306
  37 /* Opcode is officially reserved, reuse it as sc 1 when sc 1 doesn't trap */
  38 #define OP_31_XOP_FAKE_SC1      308
  39 #define OP_31_XOP_SLBMTE        402
  40 #define OP_31_XOP_SLBIE         434
  41 #define OP_31_XOP_SLBIA         498
  42 #define OP_31_XOP_MFSR          595
  43 #define OP_31_XOP_MFSRIN        659
  44 #define OP_31_XOP_DCBA          758
  45 #define OP_31_XOP_SLBMFEV       851
  46 #define OP_31_XOP_EIOIO         854
  47 #define OP_31_XOP_SLBMFEE       915
  48
  49 /* DCBZ is actually 1014, but we patch it to 1010 so we get a trap */
  50 #define OP_31_XOP_DCBZ          1010
  51
  52 #define OP_LFS                  48
  53 #define OP_LFD                  50
  54 #define OP_STFS                 52
  55 #define OP_STFD                 54
  56
  57 #define SPRN_GQR0               912
  58 #define SPRN_GQR1               913
  59 #define SPRN_GQR2               914
  60 #define SPRN_GQR3               915
  61 #define SPRN_GQR4               916
  62 #define SPRN_GQR5               917
  63 #define SPRN_GQR6               918
  64 #define SPRN_GQR7               919
  65
  66 /* Book3S_32 defines mfsrin(v) - but that messes up our abstract
  67  * function pointers, so let's just disable the define. */
  68 #undef mfsrin
  69
  70 enum priv_level {
  71         PRIV_PROBLEM = 0,
  72         PRIV_SUPER = 1,
  73         PRIV_HYPER = 2,
  74 };
  75
  76 static bool spr_allowed(struct kvm_vcpu *vcpu, enum priv_level level)
  77 {
  78         /* PAPR VMs only access supervisor SPRs */
  79         if (vcpu->arch.papr_enabled && (level > PRIV_SUPER))
  80                 return false;
  81
  82         /* Limit user space to its own small SPR set */
  83         if ((kvmppc_get_msr(vcpu) & MSR_PR) && level > PRIV_PROBLEM)
  84                 return false;
  85
  86         return true;
  87 }
  88
  89 int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
  90                               unsigned int inst, int *advance)
  91 {
  92         int emulated = EMULATE_DONE;
  93         int rt = get_rt(inst);
  94         int rs = get_rs(inst);
  95         int ra = get_ra(inst);
  96         int rb = get_rb(inst);
  97         u32 inst_sc = 0x44000002;
  98
  99         switch (get_op(inst)) {
 100         case 0:
 101                 emulated = EMULATE_FAIL;
 102                 if ((kvmppc_get_msr(vcpu) & MSR_LE) &&
 103                     (inst == swab32(inst_sc))) {
 104                         /*
 105                          * This is the byte reversed syscall instruction of our
 106                          * hypercall handler. Early versions of LE Linux didn't
 107                          * swap the instructions correctly and ended up in
 108                          * illegal instructions.
 109                          * Just always fail hypercalls on these broken systems.
 110                          */
 111                         kvmppc_set_gpr(vcpu, 3, EV_UNIMPLEMENTED);
 112                         kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4);
 113                         emulated = EMULATE_DONE;
 114                 }
 115                 break;
 116         case 19:
 117                 switch (get_xop(inst)) {
 118                 case OP_19_XOP_RFID:
 119                 case OP_19_XOP_RFI:
 120                         kvmppc_set_pc(vcpu, kvmppc_get_srr0(vcpu));
 121                         kvmppc_set_msr(vcpu, kvmppc_get_srr1(vcpu));
 122                         *advance = 0;
 123                         break;
 124
 125                 default:
 126                         emulated = EMULATE_FAIL;
 127                         break;
 128                 }
 129                 break;
 130         case 31:
 131                 switch (get_xop(inst)) {
 132                 case OP_31_XOP_MFMSR:
 133                         kvmppc_set_gpr(vcpu, rt, kvmppc_get_msr(vcpu));
 134                         break;
 135                 case OP_31_XOP_MTMSRD:
 136                 {
 137                         ulong rs_val = kvmppc_get_gpr(vcpu, rs);
 138                         if (inst & 0x10000) {
 139                                 ulong new_msr = kvmppc_get_msr(vcpu);
 140                                 new_msr &= ~(MSR_RI | MSR_EE);
 141                                 new_msr |= rs_val & (MSR_RI | MSR_EE);
 142                                 kvmppc_set_msr_fast(vcpu, new_msr);
 143                         } else
 144                                 kvmppc_set_msr(vcpu, rs_val);
 145                         break;
 146                 }
 147                 case OP_31_XOP_MTMSR:
 148                         kvmppc_set_msr(vcpu, kvmppc_get_gpr(vcpu, rs));
 149                         break;
 150                 case OP_31_XOP_MFSR:
 151                 {
 152                         int srnum;
 153
 154                         srnum = kvmppc_get_field(inst, 12 + 32, 15 + 32);
 155                         if (vcpu->arch.mmu.mfsrin) {
 156                                 u32 sr;
 157                                 sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
 158                                 kvmppc_set_gpr(vcpu, rt, sr);
 159                         }
 160                         break;
 161                 }
 162                 case OP_31_XOP_MFSRIN:
 163                 {
 164                         int srnum;
 165
 166                         srnum = (kvmppc_get_gpr(vcpu, rb) >> 28) & 0xf;
 167                         if (vcpu->arch.mmu.mfsrin) {
 168                                 u32 sr;
 169                                 sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
 170                                 kvmppc_set_gpr(vcpu, rt, sr);
 171                         }
 172                         break;
 173                 }
 174                 case OP_31_XOP_MTSR:
 175                         vcpu->arch.mmu.mtsrin(vcpu,
 176                                 (inst >> 16) & 0xf,
 177                                 kvmppc_get_gpr(vcpu, rs));
 178                         break;
 179                 case OP_31_XOP_MTSRIN:
 180                         vcpu->arch.mmu.mtsrin(vcpu,
 181                                 (kvmppc_get_gpr(vcpu, rb) >> 28) & 0xf,
 182                                 kvmppc_get_gpr(vcpu, rs));
 183                         break;
 184                 case OP_31_XOP_TLBIE:
 185                 case OP_31_XOP_TLBIEL:
 186                 {
 187                         bool large = (inst & 0x00200000) ? true : false;
 188                         ulong addr = kvmppc_get_gpr(vcpu, rb);
 189                         vcpu->arch.mmu.tlbie(vcpu, addr, large);
 190                         break;
 191                 }
 192 #ifdef CONFIG_PPC_BOOK3S_64
 193                 case OP_31_XOP_FAKE_SC1:
 194                 {
 195                         /* SC 1 papr hypercalls */
 196                         ulong cmd = kvmppc_get_gpr(vcpu, 3);
 197                         int i;
 198
 199                         if ((kvmppc_get_msr(vcpu) & MSR_PR) ||
 200                             !vcpu->arch.papr_enabled) {
 201                                 emulated = EMULATE_FAIL;
 202                                 break;
 203                         }
 204
 205                         if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE)
 206                                 break;
 207
 208                         run->papr_hcall.nr = cmd;
 209                         for (i = 0; i < 9; ++i) {
 210                                 ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
 211                                 run->papr_hcall.args[i] = gpr;
 212                         }
 213
 214                         run->exit_reason = KVM_EXIT_PAPR_HCALL;
 215                         vcpu->arch.hcall_needed = 1;
 216                         emulated = EMULATE_EXIT_USER;
 217                         break;
 218                 }
 219 #endif
 220                 case OP_31_XOP_EIOIO:
 221                         break;
 222                 case OP_31_XOP_SLBMTE:
 223                         if (!vcpu->arch.mmu.slbmte)
 224                                 return EMULATE_FAIL;
 225
 226                         vcpu->arch.mmu.slbmte(vcpu,
 227                                         kvmppc_get_gpr(vcpu, rs),
 228                                         kvmppc_get_gpr(vcpu, rb));
 229                         break;
 230                 case OP_31_XOP_SLBIE:
 231                         if (!vcpu->arch.mmu.slbie)
 232                                 return EMULATE_FAIL;
 233
 234                         vcpu->arch.mmu.slbie(vcpu,
 235                                         kvmppc_get_gpr(vcpu, rb));
 236                         break;
 237                 case OP_31_XOP_SLBIA:
 238                         if (!vcpu->arch.mmu.slbia)
 239                                 return EMULATE_FAIL;
 240
 241                         vcpu->arch.mmu.slbia(vcpu);
 242                         break;
 243                 case OP_31_XOP_SLBMFEE:
 244                         if (!vcpu->arch.mmu.slbmfee) {
 245                                 emulated = EMULATE_FAIL;
 246                         } else {
 247                                 ulong t, rb_val;
 248
 249                                 rb_val = kvmppc_get_gpr(vcpu, rb);
 250                                 t = vcpu->arch.mmu.slbmfee(vcpu, rb_val);
 251                                 kvmppc_set_gpr(vcpu, rt, t);
 252                         }
 253                         break;
 254                 case OP_31_XOP_SLBMFEV:
 255                         if (!vcpu->arch.mmu.slbmfev) {
 256                                 emulated = EMULATE_FAIL;
 257                         } else {
 258                                 ulong t, rb_val;
 259
 260                                 rb_val = kvmppc_get_gpr(vcpu, rb);
 261                                 t = vcpu->arch.mmu.slbmfev(vcpu, rb_val);
 262                                 kvmppc_set_gpr(vcpu, rt, t);
 263                         }
 264                         break;
 265                 case OP_31_XOP_DCBA:
 266                         /* Gets treated as NOP */
 267                         break;
 268                 case OP_31_XOP_DCBZ:
 269                 {
 270                         ulong rb_val = kvmppc_get_gpr(vcpu, rb);
 271                         ulong ra_val = 0;
 272                         ulong addr, vaddr;
 273                         u32 zeros[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
 274                         u32 dsisr;
 275                         int r;
 276
 277                         if (ra)
 278                                 ra_val = kvmppc_get_gpr(vcpu, ra);
 279
 280                         addr = (ra_val + rb_val) & ~31ULL;
 281                         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 282                                 addr &= 0xffffffff;
 283                         vaddr = addr;
 284
 285                         r = kvmppc_st(vcpu, &addr, 32, zeros, true);
 286                         if ((r == -ENOENT) || (r == -EPERM)) {
 287                                 *advance = 0;
 288                                 kvmppc_set_dar(vcpu, vaddr);
 289                                 vcpu->arch.fault_dar = vaddr;
 290
 291                                 dsisr = DSISR_ISSTORE;
 292                                 if (r == -ENOENT)
 293                                         dsisr |= DSISR_NOHPTE;
 294                                 else if (r == -EPERM)
 295                                         dsisr |= DSISR_PROTFAULT;
 296
 297                                 kvmppc_set_dsisr(vcpu, dsisr);
 298                                 vcpu->arch.fault_dsisr = dsisr;
 299
 300                                 kvmppc_book3s_queue_irqprio(vcpu,
 301                                         BOOK3S_INTERRUPT_DATA_STORAGE);
 302                         }
 303
 304                         break;
 305                 }
 306                 default:
 307                         emulated = EMULATE_FAIL;
 308                 }
 309                 break;
 310         default:
 311                 emulated = EMULATE_FAIL;
 312         }
 313
 314         if (emulated == EMULATE_FAIL)
 315                 emulated = kvmppc_emulate_paired_single(run, vcpu);
 316
 317         return emulated;
 318 }
 319
 320 void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat, bool upper,
 321                     u32 val)
 322 {
 323         if (upper) {
 324                 /* Upper BAT */
 325                 u32 bl = (val >> 2) & 0x7ff;
 326                 bat->bepi_mask = (~bl << 17);
 327                 bat->bepi = val & 0xfffe0000;
 328                 bat->vs = (val & 2) ? 1 : 0;
 329                 bat->vp = (val & 1) ? 1 : 0;
 330                 bat->raw = (bat->raw & 0xffffffff00000000ULL) | val;
 331         } else {
 332                 /* Lower BAT */
 333                 bat->brpn = val & 0xfffe0000;
 334                 bat->wimg = (val >> 3) & 0xf;
 335                 bat->pp = val & 3;
 336                 bat->raw = (bat->raw & 0x00000000ffffffffULL) | ((u64)val << 32);
 337         }
 338 }
 339
 340 static struct kvmppc_bat *kvmppc_find_bat(struct kvm_vcpu *vcpu, int sprn)
 341 {
 342         struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
 343         struct kvmppc_bat *bat;
 344
 345         switch (sprn) {
 346         case SPRN_IBAT0U ... SPRN_IBAT3L:
 347                 bat = &vcpu_book3s->ibat[(sprn - SPRN_IBAT0U) / 2];
 348                 break;
 349         case SPRN_IBAT4U ... SPRN_IBAT7L:
 350                 bat = &vcpu_book3s->ibat[4 + ((sprn - SPRN_IBAT4U) / 2)];
 351                 break;
 352         case SPRN_DBAT0U ... SPRN_DBAT3L:
 353                 bat = &vcpu_book3s->dbat[(sprn - SPRN_DBAT0U) / 2];
 354                 break;
 355         case SPRN_DBAT4U ... SPRN_DBAT7L:
 356                 bat = &vcpu_book3s->dbat[4 + ((sprn - SPRN_DBAT4U) / 2)];
 357                 break;
 358         default:
 359                 BUG();
 360         }
 361
 362         return bat;
 363 }
 364
 365 int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
 366 {
 367         int emulated = EMULATE_DONE;
 368
 369         switch (sprn) {
 370         case SPRN_SDR1:
 371                 if (!spr_allowed(vcpu, PRIV_HYPER))
 372                         goto unprivileged;
 373                 to_book3s(vcpu)->sdr1 = spr_val;
 374                 break;
 375         case SPRN_DSISR:
 376                 kvmppc_set_dsisr(vcpu, spr_val);
 377                 break;
 378         case SPRN_DAR:
 379                 kvmppc_set_dar(vcpu, spr_val);
 380                 break;
 381         case SPRN_HIOR:
 382                 to_book3s(vcpu)->hior = spr_val;
 383                 break;
 384         case SPRN_IBAT0U ... SPRN_IBAT3L:
 385         case SPRN_IBAT4U ... SPRN_IBAT7L:
 386         case SPRN_DBAT0U ... SPRN_DBAT3L:
 387         case SPRN_DBAT4U ... SPRN_DBAT7L:
 388         {
 389                 struct kvmppc_bat *bat = kvmppc_find_bat(vcpu, sprn);
 390
 391                 kvmppc_set_bat(vcpu, bat, !(sprn % 2), (u32)spr_val);
 392                 /* BAT writes happen so rarely that we're ok to flush
 393                  * everything here */
 394                 kvmppc_mmu_pte_flush(vcpu, 0, 0);
 395                 kvmppc_mmu_flush_segments(vcpu);
 396                 break;
 397         }
 398         case SPRN_HID0:
 399                 to_book3s(vcpu)->hid[0] = spr_val;
 400                 break;
 401         case SPRN_HID1:
 402                 to_book3s(vcpu)->hid[1] = spr_val;
 403                 break;
 404         case SPRN_HID2:
 405                 to_book3s(vcpu)->hid[2] = spr_val;
 406                 break;
 407         case SPRN_HID2_GEKKO:
 408                 to_book3s(vcpu)->hid[2] = spr_val;
 409                 /* HID2.PSE controls paired single on gekko */
 410                 switch (vcpu->arch.pvr) {
 411                 case 0x00080200:        /* lonestar 2.0 */
 412                 case 0x00088202:        /* lonestar 2.2 */
 413                 case 0x70000100:        /* gekko 1.0 */
 414                 case 0x00080100:        /* gekko 2.0 */
 415                 case 0x00083203:        /* gekko 2.3a */
 416                 case 0x00083213:        /* gekko 2.3b */
 417                 case 0x00083204:        /* gekko 2.4 */
 418                 case 0x00083214:        /* gekko 2.4e (8SE) - retail HW2 */
 419                 case 0x00087200:        /* broadway */
 420                         if (vcpu->arch.hflags & BOOK3S_HFLAG_NATIVE_PS) {
 421                                 /* Native paired singles */
 422                         } else if (spr_val & (1 << 29)) { /* HID2.PSE */
 423                                 vcpu->arch.hflags |= BOOK3S_HFLAG_PAIRED_SINGLE;
 424                                 kvmppc_giveup_ext(vcpu, MSR_FP);
 425                         } else {
 426                                 vcpu->arch.hflags &= ~BOOK3S_HFLAG_PAIRED_SINGLE;
 427                         }
 428                         break;
 429                 }
 430                 break;
 431         case SPRN_HID4:
 432         case SPRN_HID4_GEKKO:
 433                 to_book3s(vcpu)->hid[4] = spr_val;
 434                 break;
 435         case SPRN_HID5:
 436                 to_book3s(vcpu)->hid[5] = spr_val;
 437                 /* guest HID5 set can change is_dcbz32 */
 438                 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 439                     (mfmsr() & MSR_HV))
 440                         vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 441                 break;
 442         case SPRN_PURR:
 443                 to_book3s(vcpu)->purr_offset = spr_val - get_tb();
 444                 break;
 445         case SPRN_SPURR:
 446                 to_book3s(vcpu)->spurr_offset = spr_val - get_tb();
 447                 break;
 448         case SPRN_GQR0:
 449         case SPRN_GQR1:
 450         case SPRN_GQR2:
 451         case SPRN_GQR3:
 452         case SPRN_GQR4:
 453         case SPRN_GQR5:
 454         case SPRN_GQR6:
 455         case SPRN_GQR7:
 456                 to_book3s(vcpu)->gqr[sprn - SPRN_GQR0] = spr_val;
 457                 break;
 458         case SPRN_FSCR:
 459                 vcpu->arch.fscr = spr_val;
 460                 break;
 461 #ifdef CONFIG_PPC_BOOK3S_64
 462         case SPRN_BESCR:
 463                 vcpu->arch.bescr = spr_val;
 464                 break;
 465         case SPRN_EBBHR:
 466                 vcpu->arch.ebbhr = spr_val;
 467                 break;
 468         case SPRN_EBBRR:
 469                 vcpu->arch.ebbrr = spr_val;
 470                 break;
 471 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 472         case SPRN_TFHAR:
 473                 vcpu->arch.tfhar = spr_val;
 474                 break;
 475         case SPRN_TEXASR:
 476                 vcpu->arch.texasr = spr_val;
 477                 break;
 478         case SPRN_TFIAR:
 479                 vcpu->arch.tfiar = spr_val;
 480                 break;
 481 #endif
 482 #endif
 483         case SPRN_ICTC:
 484         case SPRN_THRM1:
 485         case SPRN_THRM2:
 486         case SPRN_THRM3:
 487         case SPRN_CTRLF:
 488         case SPRN_CTRLT:
 489         case SPRN_L2CR:
 490         case SPRN_DSCR:
 491         case SPRN_MMCR0_GEKKO:
 492         case SPRN_MMCR1_GEKKO:
 493         case SPRN_PMC1_GEKKO:
 494         case SPRN_PMC2_GEKKO:
 495         case SPRN_PMC3_GEKKO:
 496         case SPRN_PMC4_GEKKO:
 497         case SPRN_WPAR_GEKKO:
 498         case SPRN_MSSSR0:
 499         case SPRN_DABR:
 500 #ifdef CONFIG_PPC_BOOK3S_64
 501         case SPRN_MMCRS:
 502         case SPRN_MMCRA:
 503         case SPRN_MMCR0:
 504         case SPRN_MMCR1:
 505         case SPRN_MMCR2:
 506 #endif
 507                 break;
 508 unprivileged:
 509         default:
 510                 printk(KERN_INFO "KVM: invalid SPR write: %d\n", sprn);
 511 #ifndef DEBUG_SPR
 512                 emulated = EMULATE_FAIL;
 513 #endif
 514                 break;
 515         }
 516
 517         return emulated;
 518 }
 519
 520 int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
 521 {
 522         int emulated = EMULATE_DONE;
 523
 524         switch (sprn) {
 525         case SPRN_IBAT0U ... SPRN_IBAT3L:
 526         case SPRN_IBAT4U ... SPRN_IBAT7L:
 527         case SPRN_DBAT0U ... SPRN_DBAT3L:
 528         case SPRN_DBAT4U ... SPRN_DBAT7L:
 529         {
 530                 struct kvmppc_bat *bat = kvmppc_find_bat(vcpu, sprn);
 531
 532                 if (sprn % 2)
 533                         *spr_val = bat->raw >> 32;
 534                 else
 535                         *spr_val = bat->raw;
 536
 537                 break;
 538         }
 539         case SPRN_SDR1:
 540                 if (!spr_allowed(vcpu, PRIV_HYPER))
 541                         goto unprivileged;
 542                 *spr_val = to_book3s(vcpu)->sdr1;
 543                 break;
 544         case SPRN_DSISR:
 545                 *spr_val = kvmppc_get_dsisr(vcpu);
 546                 break;
 547         case SPRN_DAR:
 548                 *spr_val = kvmppc_get_dar(vcpu);
 549                 break;
 550         case SPRN_HIOR:
 551                 *spr_val = to_book3s(vcpu)->hior;
 552                 break;
 553         case SPRN_HID0:
 554                 *spr_val = to_book3s(vcpu)->hid[0];
 555                 break;
 556         case SPRN_HID1:
 557                 *spr_val = to_book3s(vcpu)->hid[1];
 558                 break;
 559         case SPRN_HID2:
 560         case SPRN_HID2_GEKKO:
 561                 *spr_val = to_book3s(vcpu)->hid[2];
 562                 break;
 563         case SPRN_HID4:
 564         case SPRN_HID4_GEKKO:
 565                 *spr_val = to_book3s(vcpu)->hid[4];
 566                 break;
 567         case SPRN_HID5:
 568                 *spr_val = to_book3s(vcpu)->hid[5];
 569                 break;
 570         case SPRN_CFAR:
 571         case SPRN_DSCR:
 572                 *spr_val = 0;
 573                 break;
 574         case SPRN_PURR:
 575                 *spr_val = get_tb() + to_book3s(vcpu)->purr_offset;
 576                 break;
 577         case SPRN_SPURR:
 578                 *spr_val = get_tb() + to_book3s(vcpu)->purr_offset;
 579                 break;
 580         case SPRN_GQR0:
 581         case SPRN_GQR1:
 582         case SPRN_GQR2:
 583         case SPRN_GQR3:
 584         case SPRN_GQR4:
 585         case SPRN_GQR5:
 586         case SPRN_GQR6:
 587         case SPRN_GQR7:
 588                 *spr_val = to_book3s(vcpu)->gqr[sprn - SPRN_GQR0];
 589                 break;
 590         case SPRN_FSCR:
 591                 *spr_val = vcpu->arch.fscr;
 592                 break;
 593 #ifdef CONFIG_PPC_BOOK3S_64
 594         case SPRN_BESCR:
 595                 *spr_val = vcpu->arch.bescr;
 596                 break;
 597         case SPRN_EBBHR:
 598                 *spr_val = vcpu->arch.ebbhr;
 599                 break;
 600         case SPRN_EBBRR:
 601                 *spr_val = vcpu->arch.ebbrr;
 602                 break;
 603 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 604         case SPRN_TFHAR:
 605                 *spr_val = vcpu->arch.tfhar;
 606                 break;
 607         case SPRN_TEXASR:
 608                 *spr_val = vcpu->arch.texasr;
 609                 break;
 610         case SPRN_TFIAR:
 611                 *spr_val = vcpu->arch.tfiar;
 612                 break;
 613 #endif
 614 #endif
 615         case SPRN_THRM1:
 616         case SPRN_THRM2:
 617         case SPRN_THRM3:
 618         case SPRN_CTRLF:
 619         case SPRN_CTRLT:
 620         case SPRN_L2CR:
 621         case SPRN_MMCR0_GEKKO:
 622         case SPRN_MMCR1_GEKKO:
 623         case SPRN_PMC1_GEKKO:
 624         case SPRN_PMC2_GEKKO:
 625         case SPRN_PMC3_GEKKO:
 626         case SPRN_PMC4_GEKKO:
 627         case SPRN_WPAR_GEKKO:
 628         case SPRN_MSSSR0:
 629         case SPRN_DABR:
 630 #ifdef CONFIG_PPC_BOOK3S_64
 631         case SPRN_MMCRS:
 632         case SPRN_MMCRA:
 633         case SPRN_MMCR0:
 634         case SPRN_MMCR1:
 635         case SPRN_MMCR2:
 636         case SPRN_TIR:
 637 #endif
 638                 *spr_val = 0;
 639                 break;
 640         default:
 641 unprivileged:
 642                 printk(KERN_INFO "KVM: invalid SPR read: %d\n", sprn);
 643 #ifndef DEBUG_SPR
 644                 emulated = EMULATE_FAIL;
 645 #endif
 646                 break;
 647         }
 648
 649         return emulated;
 650 }
 651
 652 u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst)
 653 {
 654         return make_dsisr(inst);
 655 }
 656
 657 ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst)
 658 {
 659 #ifdef CONFIG_PPC_BOOK3S_64
 660         /*
 661          * Linux's fix_alignment() assumes that DAR is valid, so can we
 662          */
 663         return vcpu->arch.fault_dar;
 664 #else
 665         ulong dar = 0;
 666         ulong ra = get_ra(inst);
 667         ulong rb = get_rb(inst);
 668
 669         switch (get_op(inst)) {
 670         case OP_LFS:
 671         case OP_LFD:
 672         case OP_STFD:
 673         case OP_STFS:
 674                 if (ra)
 675                         dar = kvmppc_get_gpr(vcpu, ra);
 676                 dar += (s32)((s16)inst);
 677                 break;
 678         case 31:
 679                 if (ra)
 680                         dar = kvmppc_get_gpr(vcpu, ra);
 681                 dar += kvmppc_get_gpr(vcpu, rb);
 682                 break;
 683         default:
 684                 printk(KERN_INFO "KVM: Unaligned instruction 0x%x\n", inst);
 685                 break;
 686         }
 687
 688         return dar;
 689 #endif
 690 }