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 #include "book3s.h"
  27
  28 #define OP_19_XOP_RFID          18
  29 #define OP_19_XOP_RFI           50
  30
  31 #define OP_31_XOP_MFMSR         83
  32 #define OP_31_XOP_MTMSR         146
  33 #define OP_31_XOP_MTMSRD        178
  34 #define OP_31_XOP_MTSR          210
  35 #define OP_31_XOP_MTSRIN        242
  36 #define OP_31_XOP_TLBIEL        274
  37 #define OP_31_XOP_TLBIE         306
  38 /* Opcode is officially reserved, reuse it as sc 1 when sc 1 doesn't trap */
  39 #define OP_31_XOP_FAKE_SC1      308
  40 #define OP_31_XOP_SLBMTE        402
  41 #define OP_31_XOP_SLBIE         434
  42 #define OP_31_XOP_SLBIA         498
  43 #define OP_31_XOP_MFSR          595
  44 #define OP_31_XOP_MFSRIN        659
  45 #define OP_31_XOP_DCBA          758
  46 #define OP_31_XOP_SLBMFEV       851
  47 #define OP_31_XOP_EIOIO         854
  48 #define OP_31_XOP_SLBMFEE       915
  49
  50 /* DCBZ is actually 1014, but we patch it to 1010 so we get a trap */
  51 #define OP_31_XOP_DCBZ          1010
  52
  53 #define OP_LFS                  48
  54 #define OP_LFD                  50
  55 #define OP_STFS                 52
  56 #define OP_STFD                 54
  57
  58 #define SPRN_GQR0               912
  59 #define SPRN_GQR1               913
  60 #define SPRN_GQR2               914
  61 #define SPRN_GQR3               915
  62 #define SPRN_GQR4               916
  63 #define SPRN_GQR5               917
  64 #define SPRN_GQR6               918
  65 #define SPRN_GQR7               919
  66
  67 /* Book3S_32 defines mfsrin(v) - but that messes up our abstract
  68  * function pointers, so let's just disable the define. */
  69 #undef mfsrin
  70
  71 enum priv_level {
  72         PRIV_PROBLEM = 0,
  73         PRIV_SUPER = 1,
  74         PRIV_HYPER = 2,
  75 };
  76
  77 static bool spr_allowed(struct kvm_vcpu *vcpu, enum priv_level level)
  78 {
  79         /* PAPR VMs only access supervisor SPRs */
  80         if (vcpu->arch.papr_enabled && (level > PRIV_SUPER))
  81                 return false;
  82
  83         /* Limit user space to its own small SPR set */
  84         if ((kvmppc_get_msr(vcpu) & MSR_PR) && level > PRIV_PROBLEM)
  85                 return false;
  86
  87         return true;
  88 }
  89
  90 int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
  91                               unsigned int inst, int *advance)
  92 {
  93         int emulated = EMULATE_DONE;
  94         int rt = get_rt(inst);
  95         int rs = get_rs(inst);
  96         int ra = get_ra(inst);
  97         int rb = get_rb(inst);
  98         u32 inst_sc = 0x44000002;
  99
 100         switch (get_op(inst)) {
 101         case 0:
 102                 emulated = EMULATE_FAIL;
 103                 if ((kvmppc_get_msr(vcpu) & MSR_LE) &&
 104                     (inst == swab32(inst_sc))) {
 105                         /*
 106                          * This is the byte reversed syscall instruction of our
 107                          * hypercall handler. Early versions of LE Linux didn't
 108                          * swap the instructions correctly and ended up in
 109                          * illegal instructions.
 110                          * Just always fail hypercalls on these broken systems.
 111                          */
 112                         kvmppc_set_gpr(vcpu, 3, EV_UNIMPLEMENTED);
 113                         kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4);
 114                         emulated = EMULATE_DONE;
 115                 }
 116                 break;
 117         case 19:
 118                 switch (get_xop(inst)) {
 119                 case OP_19_XOP_RFID:
 120                 case OP_19_XOP_RFI:
 121                         kvmppc_set_pc(vcpu, kvmppc_get_srr0(vcpu));
 122                         kvmppc_set_msr(vcpu, kvmppc_get_srr1(vcpu));
 123                         *advance = 0;
 124                         break;
 125
 126                 default:
 127                         emulated = EMULATE_FAIL;
 128                         break;
 129                 }
 130                 break;
 131         case 31:
 132                 switch (get_xop(inst)) {
 133                 case OP_31_XOP_MFMSR:
 134                         kvmppc_set_gpr(vcpu, rt, kvmppc_get_msr(vcpu));
 135                         break;
 136                 case OP_31_XOP_MTMSRD:
 137                 {
 138                         ulong rs_val = kvmppc_get_gpr(vcpu, rs);
 139                         if (inst & 0x10000) {
 140                                 ulong new_msr = kvmppc_get_msr(vcpu);
 141                                 new_msr &= ~(MSR_RI | MSR_EE);
 142                                 new_msr |= rs_val & (MSR_RI | MSR_EE);
 143                                 kvmppc_set_msr_fast(vcpu, new_msr);
 144                         } else
 145                                 kvmppc_set_msr(vcpu, rs_val);
 146                         break;
 147                 }
 148                 case OP_31_XOP_MTMSR:
 149                         kvmppc_set_msr(vcpu, kvmppc_get_gpr(vcpu, rs));
 150                         break;
 151                 case OP_31_XOP_MFSR:
 152                 {
 153                         int srnum;
 154
 155                         srnum = kvmppc_get_field(inst, 12 + 32, 15 + 32);
 156                         if (vcpu->arch.mmu.mfsrin) {
 157                                 u32 sr;
 158                                 sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
 159                                 kvmppc_set_gpr(vcpu, rt, sr);
 160                         }
 161                         break;
 162                 }
 163                 case OP_31_XOP_MFSRIN:
 164                 {
 165                         int srnum;
 166
 167                         srnum = (kvmppc_get_gpr(vcpu, rb) >> 28) & 0xf;
 168                         if (vcpu->arch.mmu.mfsrin) {
 169                                 u32 sr;
 170                                 sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
 171                                 kvmppc_set_gpr(vcpu, rt, sr);
 172                         }
 173                         break;
 174                 }
 175                 case OP_31_XOP_MTSR:
 176                         vcpu->arch.mmu.mtsrin(vcpu,
 177                                 (inst >> 16) & 0xf,
 178                                 kvmppc_get_gpr(vcpu, rs));
 179                         break;
 180                 case OP_31_XOP_MTSRIN:
 181                         vcpu->arch.mmu.mtsrin(vcpu,
 182                                 (kvmppc_get_gpr(vcpu, rb) >> 28) & 0xf,
 183                                 kvmppc_get_gpr(vcpu, rs));
 184                         break;
 185                 case OP_31_XOP_TLBIE:
 186                 case OP_31_XOP_TLBIEL:
 187                 {
 188                         bool large = (inst & 0x00200000) ? true : false;
 189                         ulong addr = kvmppc_get_gpr(vcpu, rb);
 190                         vcpu->arch.mmu.tlbie(vcpu, addr, large);
 191                         break;
 192                 }
 193 #ifdef CONFIG_PPC_BOOK3S_64
 194                 case OP_31_XOP_FAKE_SC1:
 195                 {
 196                         /* SC 1 papr hypercalls */
 197                         ulong cmd = kvmppc_get_gpr(vcpu, 3);
 198                         int i;
 199
 200                         if ((kvmppc_get_msr(vcpu) & MSR_PR) ||
 201                             !vcpu->arch.papr_enabled) {
 202                                 emulated = EMULATE_FAIL;
 203                                 break;
 204                         }
 205
 206                         if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE)
 207                                 break;
 208
 209                         run->papr_hcall.nr = cmd;
 210                         for (i = 0; i < 9; ++i) {
 211                                 ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
 212                                 run->papr_hcall.args[i] = gpr;
 213                         }
 214
 215                         run->exit_reason = KVM_EXIT_PAPR_HCALL;
 216                         vcpu->arch.hcall_needed = 1;
 217                         emulated = EMULATE_EXIT_USER;
 218                         break;
 219                 }
 220 #endif
 221                 case OP_31_XOP_EIOIO:
 222                         break;
 223                 case OP_31_XOP_SLBMTE:
 224                         if (!vcpu->arch.mmu.slbmte)
 225                                 return EMULATE_FAIL;
 226
 227                         vcpu->arch.mmu.slbmte(vcpu,
 228                                         kvmppc_get_gpr(vcpu, rs),
 229                                         kvmppc_get_gpr(vcpu, rb));
 230                         break;
 231                 case OP_31_XOP_SLBIE:
 232                         if (!vcpu->arch.mmu.slbie)
 233                                 return EMULATE_FAIL;
 234
 235                         vcpu->arch.mmu.slbie(vcpu,
 236                                         kvmppc_get_gpr(vcpu, rb));
 237                         break;
 238                 case OP_31_XOP_SLBIA:
 239                         if (!vcpu->arch.mmu.slbia)
 240                                 return EMULATE_FAIL;
 241
 242                         vcpu->arch.mmu.slbia(vcpu);
 243                         break;
 244                 case OP_31_XOP_SLBMFEE:
 245                         if (!vcpu->arch.mmu.slbmfee) {
 246                                 emulated = EMULATE_FAIL;
 247                         } else {
 248                                 ulong t, rb_val;
 249
 250                                 rb_val = kvmppc_get_gpr(vcpu, rb);
 251                                 t = vcpu->arch.mmu.slbmfee(vcpu, rb_val);
 252                                 kvmppc_set_gpr(vcpu, rt, t);
 253                         }
 254                         break;
 255                 case OP_31_XOP_SLBMFEV:
 256                         if (!vcpu->arch.mmu.slbmfev) {
 257                                 emulated = EMULATE_FAIL;
 258                         } else {
 259                                 ulong t, rb_val;
 260
 261                                 rb_val = kvmppc_get_gpr(vcpu, rb);
 262                                 t = vcpu->arch.mmu.slbmfev(vcpu, rb_val);
 263                                 kvmppc_set_gpr(vcpu, rt, t);
 264                         }
 265                         break;
 266                 case OP_31_XOP_DCBA:
 267                         /* Gets treated as NOP */
 268                         break;
 269                 case OP_31_XOP_DCBZ:
 270                 {
 271                         ulong rb_val = kvmppc_get_gpr(vcpu, rb);
 272                         ulong ra_val = 0;
 273                         ulong addr, vaddr;
 274                         u32 zeros[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
 275                         u32 dsisr;
 276                         int r;
 277
 278                         if (ra)
 279                                 ra_val = kvmppc_get_gpr(vcpu, ra);
 280
 281                         addr = (ra_val + rb_val) & ~31ULL;
 282                         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 283                                 addr &= 0xffffffff;
 284                         vaddr = addr;
 285
 286                         r = kvmppc_st(vcpu, &addr, 32, zeros, true);
 287                         if ((r == -ENOENT) || (r == -EPERM)) {
 288                                 *advance = 0;
 289                                 kvmppc_set_dar(vcpu, vaddr);
 290                                 vcpu->arch.fault_dar = vaddr;
 291
 292                                 dsisr = DSISR_ISSTORE;
 293                                 if (r == -ENOENT)
 294                                         dsisr |= DSISR_NOHPTE;
 295                                 else if (r == -EPERM)
 296                                         dsisr |= DSISR_PROTFAULT;
 297
 298                                 kvmppc_set_dsisr(vcpu, dsisr);
 299                                 vcpu->arch.fault_dsisr = dsisr;
 300
 301                                 kvmppc_book3s_queue_irqprio(vcpu,
 302                                         BOOK3S_INTERRUPT_DATA_STORAGE);
 303                         }
 304
 305                         break;
 306                 }
 307                 default:
 308                         emulated = EMULATE_FAIL;
 309                 }
 310                 break;
 311         default:
 312                 emulated = EMULATE_FAIL;
 313         }
 314
 315         if (emulated == EMULATE_FAIL)
 316                 emulated = kvmppc_emulate_paired_single(run, vcpu);
 317
 318         return emulated;
 319 }
 320
 321 void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat, bool upper,
 322                     u32 val)
 323 {
 324         if (upper) {
 325                 /* Upper BAT */
 326                 u32 bl = (val >> 2) & 0x7ff;
 327                 bat->bepi_mask = (~bl << 17);
 328                 bat->bepi = val & 0xfffe0000;
 329                 bat->vs = (val & 2) ? 1 : 0;
 330                 bat->vp = (val & 1) ? 1 : 0;
 331                 bat->raw = (bat->raw & 0xffffffff00000000ULL) | val;
 332         } else {
 333                 /* Lower BAT */
 334                 bat->brpn = val & 0xfffe0000;
 335                 bat->wimg = (val >> 3) & 0xf;
 336                 bat->pp = val & 3;
 337                 bat->raw = (bat->raw & 0x00000000ffffffffULL) | ((u64)val << 32);
 338         }
 339 }
 340
 341 static struct kvmppc_bat *kvmppc_find_bat(struct kvm_vcpu *vcpu, int sprn)
 342 {
 343         struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
 344         struct kvmppc_bat *bat;
 345
 346         switch (sprn) {
 347         case SPRN_IBAT0U ... SPRN_IBAT3L:
 348                 bat = &vcpu_book3s->ibat[(sprn - SPRN_IBAT0U) / 2];
 349                 break;
 350         case SPRN_IBAT4U ... SPRN_IBAT7L:
 351                 bat = &vcpu_book3s->ibat[4 + ((sprn - SPRN_IBAT4U) / 2)];
 352                 break;
 353         case SPRN_DBAT0U ... SPRN_DBAT3L:
 354                 bat = &vcpu_book3s->dbat[(sprn - SPRN_DBAT0U) / 2];
 355                 break;
 356         case SPRN_DBAT4U ... SPRN_DBAT7L:
 357                 bat = &vcpu_book3s->dbat[4 + ((sprn - SPRN_DBAT4U) / 2)];
 358                 break;
 359         default:
 360                 BUG();
 361         }
 362
 363         return bat;
 364 }
 365
 366 int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
 367 {
 368         int emulated = EMULATE_DONE;
 369
 370         switch (sprn) {
 371         case SPRN_SDR1:
 372                 if (!spr_allowed(vcpu, PRIV_HYPER))
 373                         goto unprivileged;
 374                 to_book3s(vcpu)->sdr1 = spr_val;
 375                 break;
 376         case SPRN_DSISR:
 377                 kvmppc_set_dsisr(vcpu, spr_val);
 378                 break;
 379         case SPRN_DAR:
 380                 kvmppc_set_dar(vcpu, spr_val);
 381                 break;
 382         case SPRN_HIOR:
 383                 to_book3s(vcpu)->hior = spr_val;
 384                 break;
 385         case SPRN_IBAT0U ... SPRN_IBAT3L:
 386         case SPRN_IBAT4U ... SPRN_IBAT7L:
 387         case SPRN_DBAT0U ... SPRN_DBAT3L:
 388         case SPRN_DBAT4U ... SPRN_DBAT7L:
 389         {
 390                 struct kvmppc_bat *bat = kvmppc_find_bat(vcpu, sprn);
 391
 392                 kvmppc_set_bat(vcpu, bat, !(sprn % 2), (u32)spr_val);
 393                 /* BAT writes happen so rarely that we're ok to flush
 394                  * everything here */
 395                 kvmppc_mmu_pte_flush(vcpu, 0, 0);
 396                 kvmppc_mmu_flush_segments(vcpu);
 397                 break;
 398         }
 399         case SPRN_HID0:
 400                 to_book3s(vcpu)->hid[0] = spr_val;
 401                 break;
 402         case SPRN_HID1:
 403                 to_book3s(vcpu)->hid[1] = spr_val;
 404                 break;
 405         case SPRN_HID2:
 406                 to_book3s(vcpu)->hid[2] = spr_val;
 407                 break;
 408         case SPRN_HID2_GEKKO:
 409                 to_book3s(vcpu)->hid[2] = spr_val;
 410                 /* HID2.PSE controls paired single on gekko */
 411                 switch (vcpu->arch.pvr) {
 412                 case 0x00080200:        /* lonestar 2.0 */
 413                 case 0x00088202:        /* lonestar 2.2 */
 414                 case 0x70000100:        /* gekko 1.0 */
 415                 case 0x00080100:        /* gekko 2.0 */
 416                 case 0x00083203:        /* gekko 2.3a */
 417                 case 0x00083213:        /* gekko 2.3b */
 418                 case 0x00083204:        /* gekko 2.4 */
 419                 case 0x00083214:        /* gekko 2.4e (8SE) - retail HW2 */
 420                 case 0x00087200:        /* broadway */
 421                         if (vcpu->arch.hflags & BOOK3S_HFLAG_NATIVE_PS) {
 422                                 /* Native paired singles */
 423                         } else if (spr_val & (1 << 29)) { /* HID2.PSE */
 424                                 vcpu->arch.hflags |= BOOK3S_HFLAG_PAIRED_SINGLE;
 425                                 kvmppc_giveup_ext(vcpu, MSR_FP);
 426                         } else {
 427                                 vcpu->arch.hflags &= ~BOOK3S_HFLAG_PAIRED_SINGLE;
 428                         }
 429                         break;
 430                 }
 431                 break;
 432         case SPRN_HID4:
 433         case SPRN_HID4_GEKKO:
 434                 to_book3s(vcpu)->hid[4] = spr_val;
 435                 break;
 436         case SPRN_HID5:
 437                 to_book3s(vcpu)->hid[5] = spr_val;
 438                 /* guest HID5 set can change is_dcbz32 */
 439                 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
 440                     (mfmsr() & MSR_HV))
 441                         vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
 442                 break;
 443         case SPRN_GQR0:
 444         case SPRN_GQR1:
 445         case SPRN_GQR2:
 446         case SPRN_GQR3:
 447         case SPRN_GQR4:
 448         case SPRN_GQR5:
 449         case SPRN_GQR6:
 450         case SPRN_GQR7:
 451                 to_book3s(vcpu)->gqr[sprn - SPRN_GQR0] = spr_val;
 452                 break;
 453 #ifdef CONFIG_PPC_BOOK3S_64
 454         case SPRN_FSCR:
 455                 kvmppc_set_fscr(vcpu, spr_val);
 456                 break;
 457         case SPRN_BESCR:
 458                 vcpu->arch.bescr = spr_val;
 459                 break;
 460         case SPRN_EBBHR:
 461                 vcpu->arch.ebbhr = spr_val;
 462                 break;
 463         case SPRN_EBBRR:
 464                 vcpu->arch.ebbrr = spr_val;
 465                 break;
 466 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 467         case SPRN_TFHAR:
 468                 vcpu->arch.tfhar = spr_val;
 469                 break;
 470         case SPRN_TEXASR:
 471                 vcpu->arch.texasr = spr_val;
 472                 break;
 473         case SPRN_TFIAR:
 474                 vcpu->arch.tfiar = spr_val;
 475                 break;
 476 #endif
 477 #endif
 478         case SPRN_ICTC:
 479         case SPRN_THRM1:
 480         case SPRN_THRM2:
 481         case SPRN_THRM3:
 482         case SPRN_CTRLF:
 483         case SPRN_CTRLT:
 484         case SPRN_L2CR:
 485         case SPRN_DSCR:
 486         case SPRN_MMCR0_GEKKO:
 487         case SPRN_MMCR1_GEKKO:
 488         case SPRN_PMC1_GEKKO:
 489         case SPRN_PMC2_GEKKO:
 490         case SPRN_PMC3_GEKKO:
 491         case SPRN_PMC4_GEKKO:
 492         case SPRN_WPAR_GEKKO:
 493         case SPRN_MSSSR0:
 494         case SPRN_DABR:
 495 #ifdef CONFIG_PPC_BOOK3S_64
 496         case SPRN_MMCRS:
 497         case SPRN_MMCRA:
 498         case SPRN_MMCR0:
 499         case SPRN_MMCR1:
 500         case SPRN_MMCR2:
 501         case SPRN_UMMCR2:
 502 #endif
 503                 break;
 504 unprivileged:
 505         default:
 506                 pr_info_ratelimited("KVM: invalid SPR write: %d\n", sprn);
 507                 if (sprn & 0x10) {
 508                         if (kvmppc_get_msr(vcpu) & MSR_PR) {
 509                                 kvmppc_core_queue_program(vcpu, SRR1_PROGPRIV);
 510                                 emulated = EMULATE_AGAIN;
 511                         }
 512                 } else {
 513                         if ((kvmppc_get_msr(vcpu) & MSR_PR) || sprn == 0) {
 514                                 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
 515                                 emulated = EMULATE_AGAIN;
 516                         }
 517                 }
 518                 break;
 519         }
 520
 521         return emulated;
 522 }
 523
 524 int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
 525 {
 526         int emulated = EMULATE_DONE;
 527
 528         switch (sprn) {
 529         case SPRN_IBAT0U ... SPRN_IBAT3L:
 530         case SPRN_IBAT4U ... SPRN_IBAT7L:
 531         case SPRN_DBAT0U ... SPRN_DBAT3L:
 532         case SPRN_DBAT4U ... SPRN_DBAT7L:
 533         {
 534                 struct kvmppc_bat *bat = kvmppc_find_bat(vcpu, sprn);
 535
 536                 if (sprn % 2)
 537                         *spr_val = bat->raw >> 32;
 538                 else
 539                         *spr_val = bat->raw;
 540
 541                 break;
 542         }
 543         case SPRN_SDR1:
 544                 if (!spr_allowed(vcpu, PRIV_HYPER))
 545                         goto unprivileged;
 546                 *spr_val = to_book3s(vcpu)->sdr1;
 547                 break;
 548         case SPRN_DSISR:
 549                 *spr_val = kvmppc_get_dsisr(vcpu);
 550                 break;
 551         case SPRN_DAR:
 552                 *spr_val = kvmppc_get_dar(vcpu);
 553                 break;
 554         case SPRN_HIOR:
 555                 *spr_val = to_book3s(vcpu)->hior;
 556                 break;
 557         case SPRN_HID0:
 558                 *spr_val = to_book3s(vcpu)->hid[0];
 559                 break;
 560         case SPRN_HID1:
 561                 *spr_val = to_book3s(vcpu)->hid[1];
 562                 break;
 563         case SPRN_HID2:
 564         case SPRN_HID2_GEKKO:
 565                 *spr_val = to_book3s(vcpu)->hid[2];
 566                 break;
 567         case SPRN_HID4:
 568         case SPRN_HID4_GEKKO:
 569                 *spr_val = to_book3s(vcpu)->hid[4];
 570                 break;
 571         case SPRN_HID5:
 572                 *spr_val = to_book3s(vcpu)->hid[5];
 573                 break;
 574         case SPRN_CFAR:
 575         case SPRN_DSCR:
 576                 *spr_val = 0;
 577                 break;
 578         case SPRN_PURR:
 579                 /*
 580                  * On exit we would have updated purr
 581                  */
 582                 *spr_val = vcpu->arch.purr;
 583                 break;
 584         case SPRN_SPURR:
 585                 /*
 586                  * On exit we would have updated spurr
 587                  */
 588                 *spr_val = vcpu->arch.spurr;
 589                 break;
 590         case SPRN_VTB:
 591                 *spr_val = to_book3s(vcpu)->vtb;
 592                 break;
 593         case SPRN_IC:
 594                 *spr_val = vcpu->arch.ic;
 595                 break;
 596         case SPRN_GQR0:
 597         case SPRN_GQR1:
 598         case SPRN_GQR2:
 599         case SPRN_GQR3:
 600         case SPRN_GQR4:
 601         case SPRN_GQR5:
 602         case SPRN_GQR6:
 603         case SPRN_GQR7:
 604                 *spr_val = to_book3s(vcpu)->gqr[sprn - SPRN_GQR0];
 605                 break;
 606 #ifdef CONFIG_PPC_BOOK3S_64
 607         case SPRN_FSCR:
 608                 *spr_val = vcpu->arch.fscr;
 609                 break;
 610         case SPRN_BESCR:
 611                 *spr_val = vcpu->arch.bescr;
 612                 break;
 613         case SPRN_EBBHR:
 614                 *spr_val = vcpu->arch.ebbhr;
 615                 break;
 616         case SPRN_EBBRR:
 617                 *spr_val = vcpu->arch.ebbrr;
 618                 break;
 619 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 620         case SPRN_TFHAR:
 621                 *spr_val = vcpu->arch.tfhar;
 622                 break;
 623         case SPRN_TEXASR:
 624                 *spr_val = vcpu->arch.texasr;
 625                 break;
 626         case SPRN_TFIAR:
 627                 *spr_val = vcpu->arch.tfiar;
 628                 break;
 629 #endif
 630 #endif
 631         case SPRN_THRM1:
 632         case SPRN_THRM2:
 633         case SPRN_THRM3:
 634         case SPRN_CTRLF:
 635         case SPRN_CTRLT:
 636         case SPRN_L2CR:
 637         case SPRN_MMCR0_GEKKO:
 638         case SPRN_MMCR1_GEKKO:
 639         case SPRN_PMC1_GEKKO:
 640         case SPRN_PMC2_GEKKO:
 641         case SPRN_PMC3_GEKKO:
 642         case SPRN_PMC4_GEKKO:
 643         case SPRN_WPAR_GEKKO:
 644         case SPRN_MSSSR0:
 645         case SPRN_DABR:
 646 #ifdef CONFIG_PPC_BOOK3S_64
 647         case SPRN_MMCRS:
 648         case SPRN_MMCRA:
 649         case SPRN_MMCR0:
 650         case SPRN_MMCR1:
 651         case SPRN_MMCR2:
 652         case SPRN_UMMCR2:
 653         case SPRN_TIR:
 654 #endif
 655                 *spr_val = 0;
 656                 break;
 657         default:
 658 unprivileged:
 659                 pr_info_ratelimited("KVM: invalid SPR read: %d\n", sprn);
 660                 if (sprn & 0x10) {
 661                         if (kvmppc_get_msr(vcpu) & MSR_PR) {
 662                                 kvmppc_core_queue_program(vcpu, SRR1_PROGPRIV);
 663                                 emulated = EMULATE_AGAIN;
 664                         }
 665                 } else {
 666                         if ((kvmppc_get_msr(vcpu) & MSR_PR) || sprn == 0 ||
 667                             sprn == 4 || sprn == 5 || sprn == 6) {
 668                                 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
 669                                 emulated = EMULATE_AGAIN;
 670                         }
 671                 }
 672
 673                 break;
 674         }
 675
 676         return emulated;
 677 }
 678
 679 u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst)
 680 {
 681         return make_dsisr(inst);
 682 }
 683
 684 ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst)
 685 {
 686 #ifdef CONFIG_PPC_BOOK3S_64
 687         /*
 688          * Linux's fix_alignment() assumes that DAR is valid, so can we
 689          */
 690         return vcpu->arch.fault_dar;
 691 #else
 692         ulong dar = 0;
 693         ulong ra = get_ra(inst);
 694         ulong rb = get_rb(inst);
 695
 696         switch (get_op(inst)) {
 697         case OP_LFS:
 698         case OP_LFD:
 699         case OP_STFD:
 700         case OP_STFS:
 701                 if (ra)
 702                         dar = kvmppc_get_gpr(vcpu, ra);
 703                 dar += (s32)((s16)inst);
 704                 break;
 705         case 31:
 706                 if (ra)
 707                         dar = kvmppc_get_gpr(vcpu, ra);
 708                 dar += kvmppc_get_gpr(vcpu, rb);
 709                 break;
 710         default:
 711                 printk(KERN_INFO "KVM: Unaligned instruction 0x%x\n", inst);
 712                 break;
 713         }
 714
 715         return dar;
 716 #endif
 717 }