linux/arch/powerpc/kvm/book3s_emulate.c
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   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
  71enum priv_level {
  72        PRIV_PROBLEM = 0,
  73        PRIV_SUPER = 1,
  74        PRIV_HYPER = 2,
  75};
  76
  77static 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
  90int 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
 321void 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
 341static 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
 366int 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;
 504unprivileged:
 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
 524int 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:
 658unprivileged:
 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
 679u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst)
 680{
 681        return make_dsisr(inst);
 682}
 683
 684ulong 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}
 718