hw/ppc/spapr_hcall.c

   1 #include "qemu/osdep.h"
   2 #include "qapi/error.h"
   3 #include "sysemu/sysemu.h"
   4 #include "qemu/log.h"
   5 #include "cpu.h"
   6 #include "exec/exec-all.h"
   7 #include "helper_regs.h"
   8 #include "hw/ppc/spapr.h"
   9 #include "mmu-hash64.h"
  10 #include "cpu-models.h"
  11 #include "trace.h"
  12 #include "sysemu/kvm.h"
  13 #include "kvm_ppc.h"
  14
  15 struct SPRSyncState {
  16     CPUState *cs;
  17     int spr;
  18     target_ulong value;
  19     target_ulong mask;
  20 };
  21
  22 static void do_spr_sync(void *arg)
  23 {
  24     struct SPRSyncState *s = arg;
  25     PowerPCCPU *cpu = POWERPC_CPU(s->cs);
  26     CPUPPCState *env = &cpu->env;
  27
  28     cpu_synchronize_state(s->cs);
  29     env->spr[s->spr] &= ~s->mask;
  30     env->spr[s->spr] |= s->value;
  31 }
  32
  33 static void set_spr(CPUState *cs, int spr, target_ulong value,
  34                     target_ulong mask)
  35 {
  36     struct SPRSyncState s = {
  37         .cs = cs,
  38         .spr = spr,
  39         .value = value,
  40         .mask = mask
  41     };
  42     run_on_cpu(cs, do_spr_sync, &s);
  43 }
  44
  45 static bool has_spr(PowerPCCPU *cpu, int spr)
  46 {
  47     /* We can test whether the SPR is defined by checking for a valid name */
  48     return cpu->env.spr_cb[spr].name != NULL;
  49 }
  50
  51 static inline bool valid_pte_index(CPUPPCState *env, target_ulong pte_index)
  52 {
  53     /*
  54      * hash value/pteg group index is normalized by htab_mask
  55      */
  56     if (((pte_index & ~7ULL) / HPTES_PER_GROUP) & ~env->htab_mask) {
  57         return false;
  58     }
  59     return true;
  60 }
  61
  62 static bool is_ram_address(sPAPRMachineState *spapr, hwaddr addr)
  63 {
  64     MachineState *machine = MACHINE(spapr);
  65     MemoryHotplugState *hpms = &spapr->hotplug_memory;
  66
  67     if (addr < machine->ram_size) {
  68         return true;
  69     }
  70     if ((addr >= hpms->base)
  71         && ((addr - hpms->base) < memory_region_size(&hpms->mr))) {
  72         return true;
  73     }
  74
  75     return false;
  76 }
  77
  78 static target_ulong h_enter(PowerPCCPU *cpu, sPAPRMachineState *spapr,
  79                             target_ulong opcode, target_ulong *args)
  80 {
  81     CPUPPCState *env = &cpu->env;
  82     target_ulong flags = args[0];
  83     target_ulong pte_index = args[1];
  84     target_ulong pteh = args[2];
  85     target_ulong ptel = args[3];
  86     unsigned apshift, spshift;
  87     target_ulong raddr;
  88     target_ulong index;
  89     uint64_t token;
  90
  91     apshift = ppc_hash64_hpte_page_shift_noslb(cpu, pteh, ptel, &spshift);
  92     if (!apshift) {
  93         /* Bad page size encoding */
  94         return H_PARAMETER;
  95     }
  96
  97     raddr = (ptel & HPTE64_R_RPN) & ~((1ULL << apshift) - 1);
  98
  99     if (is_ram_address(spapr, raddr)) {
 100         /* Regular RAM - should have WIMG=0010 */
 101         if ((ptel & HPTE64_R_WIMG) != HPTE64_R_M) {
 102             return H_PARAMETER;
 103         }
 104     } else {
 105         /* Looks like an IO address */
 106         /* FIXME: What WIMG combinations could be sensible for IO?
 107          * For now we allow WIMG=010x, but are there others? */
 108         /* FIXME: Should we check against registered IO addresses? */
 109         if ((ptel & (HPTE64_R_W | HPTE64_R_I | HPTE64_R_M)) != HPTE64_R_I) {
 110             return H_PARAMETER;
 111         }
 112     }
 113
 114     pteh &= ~0x60ULL;
 115
 116     if (!valid_pte_index(env, pte_index)) {
 117         return H_PARAMETER;
 118     }
 119
 120     index = 0;
 121     if (likely((flags & H_EXACT) == 0)) {
 122         pte_index &= ~7ULL;
 123         token = ppc_hash64_start_access(cpu, pte_index);
 124         for (; index < 8; index++) {
 125             if (!(ppc_hash64_load_hpte0(cpu, token, index) & HPTE64_V_VALID)) {
 126                 break;
 127             }
 128         }
 129         ppc_hash64_stop_access(cpu, token);
 130         if (index == 8) {
 131             return H_PTEG_FULL;
 132         }
 133     } else {
 134         token = ppc_hash64_start_access(cpu, pte_index);
 135         if (ppc_hash64_load_hpte0(cpu, token, 0) & HPTE64_V_VALID) {
 136             ppc_hash64_stop_access(cpu, token);
 137             return H_PTEG_FULL;
 138         }
 139         ppc_hash64_stop_access(cpu, token);
 140     }
 141
 142     ppc_hash64_store_hpte(cpu, pte_index + index,
 143                           pteh | HPTE64_V_HPTE_DIRTY, ptel);
 144
 145     args[0] = pte_index + index;
 146     return H_SUCCESS;
 147 }
 148
 149 typedef enum {
 150     REMOVE_SUCCESS = 0,
 151     REMOVE_NOT_FOUND = 1,
 152     REMOVE_PARM = 2,
 153     REMOVE_HW = 3,
 154 } RemoveResult;
 155
 156 static RemoveResult remove_hpte(PowerPCCPU *cpu, target_ulong ptex,
 157                                 target_ulong avpn,
 158                                 target_ulong flags,
 159                                 target_ulong *vp, target_ulong *rp)
 160 {
 161     CPUPPCState *env = &cpu->env;
 162     uint64_t token;
 163     target_ulong v, r;
 164
 165     if (!valid_pte_index(env, ptex)) {
 166         return REMOVE_PARM;
 167     }
 168
 169     token = ppc_hash64_start_access(cpu, ptex);
 170     v = ppc_hash64_load_hpte0(cpu, token, 0);
 171     r = ppc_hash64_load_hpte1(cpu, token, 0);
 172     ppc_hash64_stop_access(cpu, token);
 173
 174     if ((v & HPTE64_V_VALID) == 0 ||
 175         ((flags & H_AVPN) && (v & ~0x7fULL) != avpn) ||
 176         ((flags & H_ANDCOND) && (v & avpn) != 0)) {
 177         return REMOVE_NOT_FOUND;
 178     }
 179     *vp = v;
 180     *rp = r;
 181     ppc_hash64_store_hpte(cpu, ptex, HPTE64_V_HPTE_DIRTY, 0);
 182     ppc_hash64_tlb_flush_hpte(cpu, ptex, v, r);
 183     return REMOVE_SUCCESS;
 184 }
 185
 186 static target_ulong h_remove(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 187                              target_ulong opcode, target_ulong *args)
 188 {
 189     CPUPPCState *env = &cpu->env;
 190     target_ulong flags = args[0];
 191     target_ulong pte_index = args[1];
 192     target_ulong avpn = args[2];
 193     RemoveResult ret;
 194
 195     ret = remove_hpte(cpu, pte_index, avpn, flags,
 196                       &args[0], &args[1]);
 197
 198     switch (ret) {
 199     case REMOVE_SUCCESS:
 200         check_tlb_flush(env);
 201         return H_SUCCESS;
 202
 203     case REMOVE_NOT_FOUND:
 204         return H_NOT_FOUND;
 205
 206     case REMOVE_PARM:
 207         return H_PARAMETER;
 208
 209     case REMOVE_HW:
 210         return H_HARDWARE;
 211     }
 212
 213     g_assert_not_reached();
 214 }
 215
 216 #define H_BULK_REMOVE_TYPE             0xc000000000000000ULL
 217 #define   H_BULK_REMOVE_REQUEST        0x4000000000000000ULL
 218 #define   H_BULK_REMOVE_RESPONSE       0x8000000000000000ULL
 219 #define   H_BULK_REMOVE_END            0xc000000000000000ULL
 220 #define H_BULK_REMOVE_CODE             0x3000000000000000ULL
 221 #define   H_BULK_REMOVE_SUCCESS        0x0000000000000000ULL
 222 #define   H_BULK_REMOVE_NOT_FOUND      0x1000000000000000ULL
 223 #define   H_BULK_REMOVE_PARM           0x2000000000000000ULL
 224 #define   H_BULK_REMOVE_HW             0x3000000000000000ULL
 225 #define H_BULK_REMOVE_RC               0x0c00000000000000ULL
 226 #define H_BULK_REMOVE_FLAGS            0x0300000000000000ULL
 227 #define   H_BULK_REMOVE_ABSOLUTE       0x0000000000000000ULL
 228 #define   H_BULK_REMOVE_ANDCOND        0x0100000000000000ULL
 229 #define   H_BULK_REMOVE_AVPN           0x0200000000000000ULL
 230 #define H_BULK_REMOVE_PTEX             0x00ffffffffffffffULL
 231
 232 #define H_BULK_REMOVE_MAX_BATCH        4
 233
 234 static target_ulong h_bulk_remove(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 235                                   target_ulong opcode, target_ulong *args)
 236 {
 237     CPUPPCState *env = &cpu->env;
 238     int i;
 239     target_ulong rc = H_SUCCESS;
 240
 241     for (i = 0; i < H_BULK_REMOVE_MAX_BATCH; i++) {
 242         target_ulong *tsh = &args[i*2];
 243         target_ulong tsl = args[i*2 + 1];
 244         target_ulong v, r, ret;
 245
 246         if ((*tsh & H_BULK_REMOVE_TYPE) == H_BULK_REMOVE_END) {
 247             break;
 248         } else if ((*tsh & H_BULK_REMOVE_TYPE) != H_BULK_REMOVE_REQUEST) {
 249             return H_PARAMETER;
 250         }
 251
 252         *tsh &= H_BULK_REMOVE_PTEX | H_BULK_REMOVE_FLAGS;
 253         *tsh |= H_BULK_REMOVE_RESPONSE;
 254
 255         if ((*tsh & H_BULK_REMOVE_ANDCOND) && (*tsh & H_BULK_REMOVE_AVPN)) {
 256             *tsh |= H_BULK_REMOVE_PARM;
 257             return H_PARAMETER;
 258         }
 259
 260         ret = remove_hpte(cpu, *tsh & H_BULK_REMOVE_PTEX, tsl,
 261                           (*tsh & H_BULK_REMOVE_FLAGS) >> 26,
 262                           &v, &r);
 263
 264         *tsh |= ret << 60;
 265
 266         switch (ret) {
 267         case REMOVE_SUCCESS:
 268             *tsh |= (r & (HPTE64_R_C | HPTE64_R_R)) << 43;
 269             break;
 270
 271         case REMOVE_PARM:
 272             rc = H_PARAMETER;
 273             goto exit;
 274
 275         case REMOVE_HW:
 276             rc = H_HARDWARE;
 277             goto exit;
 278         }
 279     }
 280  exit:
 281     check_tlb_flush(env);
 282
 283     return rc;
 284 }
 285
 286 static target_ulong h_protect(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 287                               target_ulong opcode, target_ulong *args)
 288 {
 289     CPUPPCState *env = &cpu->env;
 290     target_ulong flags = args[0];
 291     target_ulong pte_index = args[1];
 292     target_ulong avpn = args[2];
 293     uint64_t token;
 294     target_ulong v, r;
 295
 296     if (!valid_pte_index(env, pte_index)) {
 297         return H_PARAMETER;
 298     }
 299
 300     token = ppc_hash64_start_access(cpu, pte_index);
 301     v = ppc_hash64_load_hpte0(cpu, token, 0);
 302     r = ppc_hash64_load_hpte1(cpu, token, 0);
 303     ppc_hash64_stop_access(cpu, token);
 304
 305     if ((v & HPTE64_V_VALID) == 0 ||
 306         ((flags & H_AVPN) && (v & ~0x7fULL) != avpn)) {
 307         return H_NOT_FOUND;
 308     }
 309
 310     r &= ~(HPTE64_R_PP0 | HPTE64_R_PP | HPTE64_R_N |
 311            HPTE64_R_KEY_HI | HPTE64_R_KEY_LO);
 312     r |= (flags << 55) & HPTE64_R_PP0;
 313     r |= (flags << 48) & HPTE64_R_KEY_HI;
 314     r |= flags & (HPTE64_R_PP | HPTE64_R_N | HPTE64_R_KEY_LO);
 315     ppc_hash64_store_hpte(cpu, pte_index,
 316                           (v & ~HPTE64_V_VALID) | HPTE64_V_HPTE_DIRTY, 0);
 317     ppc_hash64_tlb_flush_hpte(cpu, pte_index, v, r);
 318     /* Don't need a memory barrier, due to qemu's global lock */
 319     ppc_hash64_store_hpte(cpu, pte_index, v | HPTE64_V_HPTE_DIRTY, r);
 320     return H_SUCCESS;
 321 }
 322
 323 static target_ulong h_read(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 324                            target_ulong opcode, target_ulong *args)
 325 {
 326     CPUPPCState *env = &cpu->env;
 327     target_ulong flags = args[0];
 328     target_ulong pte_index = args[1];
 329     uint8_t *hpte;
 330     int i, ridx, n_entries = 1;
 331
 332     if (!valid_pte_index(env, pte_index)) {
 333         return H_PARAMETER;
 334     }
 335
 336     if (flags & H_READ_4) {
 337         /* Clear the two low order bits */
 338         pte_index &= ~(3ULL);
 339         n_entries = 4;
 340     }
 341
 342     hpte = env->external_htab + (pte_index * HASH_PTE_SIZE_64);
 343
 344     for (i = 0, ridx = 0; i < n_entries; i++) {
 345         args[ridx++] = ldq_p(hpte);
 346         args[ridx++] = ldq_p(hpte + (HASH_PTE_SIZE_64/2));
 347         hpte += HASH_PTE_SIZE_64;
 348     }
 349
 350     return H_SUCCESS;
 351 }
 352
 353 static target_ulong h_set_sprg0(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 354                                 target_ulong opcode, target_ulong *args)
 355 {
 356     cpu_synchronize_state(CPU(cpu));
 357     cpu->env.spr[SPR_SPRG0] = args[0];
 358
 359     return H_SUCCESS;
 360 }
 361
 362 static target_ulong h_set_dabr(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 363                                target_ulong opcode, target_ulong *args)
 364 {
 365     if (!has_spr(cpu, SPR_DABR)) {
 366         return H_HARDWARE;              /* DABR register not available */
 367     }
 368     cpu_synchronize_state(CPU(cpu));
 369
 370     if (has_spr(cpu, SPR_DABRX)) {
 371         cpu->env.spr[SPR_DABRX] = 0x3;  /* Use Problem and Privileged state */
 372     } else if (!(args[0] & 0x4)) {      /* Breakpoint Translation set? */
 373         return H_RESERVED_DABR;
 374     }
 375
 376     cpu->env.spr[SPR_DABR] = args[0];
 377     return H_SUCCESS;
 378 }
 379
 380 static target_ulong h_set_xdabr(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 381                                 target_ulong opcode, target_ulong *args)
 382 {
 383     target_ulong dabrx = args[1];
 384
 385     if (!has_spr(cpu, SPR_DABR) || !has_spr(cpu, SPR_DABRX)) {
 386         return H_HARDWARE;
 387     }
 388
 389     if ((dabrx & ~0xfULL) != 0 || (dabrx & H_DABRX_HYPERVISOR) != 0
 390         || (dabrx & (H_DABRX_KERNEL | H_DABRX_USER)) == 0) {
 391         return H_PARAMETER;
 392     }
 393
 394     cpu_synchronize_state(CPU(cpu));
 395     cpu->env.spr[SPR_DABRX] = dabrx;
 396     cpu->env.spr[SPR_DABR] = args[0];
 397
 398     return H_SUCCESS;
 399 }
 400
 401 static target_ulong h_page_init(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 402                                 target_ulong opcode, target_ulong *args)
 403 {
 404     target_ulong flags = args[0];
 405     hwaddr dst = args[1];
 406     hwaddr src = args[2];
 407     hwaddr len = TARGET_PAGE_SIZE;
 408     uint8_t *pdst, *psrc;
 409     target_long ret = H_SUCCESS;
 410
 411     if (flags & ~(H_ICACHE_SYNCHRONIZE | H_ICACHE_INVALIDATE
 412                   | H_COPY_PAGE | H_ZERO_PAGE)) {
 413         qemu_log_mask(LOG_UNIMP, "h_page_init: Bad flags (" TARGET_FMT_lx "\n",
 414                       flags);
 415         return H_PARAMETER;
 416     }
 417
 418     /* Map-in destination */
 419     if (!is_ram_address(spapr, dst) || (dst & ~TARGET_PAGE_MASK) != 0) {
 420         return H_PARAMETER;
 421     }
 422     pdst = cpu_physical_memory_map(dst, &len, 1);
 423     if (!pdst || len != TARGET_PAGE_SIZE) {
 424         return H_PARAMETER;
 425     }
 426
 427     if (flags & H_COPY_PAGE) {
 428         /* Map-in source, copy to destination, and unmap source again */
 429         if (!is_ram_address(spapr, src) || (src & ~TARGET_PAGE_MASK) != 0) {
 430             ret = H_PARAMETER;
 431             goto unmap_out;
 432         }
 433         psrc = cpu_physical_memory_map(src, &len, 0);
 434         if (!psrc || len != TARGET_PAGE_SIZE) {
 435             ret = H_PARAMETER;
 436             goto unmap_out;
 437         }
 438         memcpy(pdst, psrc, len);
 439         cpu_physical_memory_unmap(psrc, len, 0, len);
 440     } else if (flags & H_ZERO_PAGE) {
 441         memset(pdst, 0, len);          /* Just clear the destination page */
 442     }
 443
 444     if (kvm_enabled() && (flags & H_ICACHE_SYNCHRONIZE) != 0) {
 445         kvmppc_dcbst_range(cpu, pdst, len);
 446     }
 447     if (flags & (H_ICACHE_SYNCHRONIZE | H_ICACHE_INVALIDATE)) {
 448         if (kvm_enabled()) {
 449             kvmppc_icbi_range(cpu, pdst, len);
 450         } else {
 451             tb_flush(CPU(cpu));
 452         }
 453     }
 454
 455 unmap_out:
 456     cpu_physical_memory_unmap(pdst, TARGET_PAGE_SIZE, 1, len);
 457     return ret;
 458 }
 459
 460 #define FLAGS_REGISTER_VPA         0x0000200000000000ULL
 461 #define FLAGS_REGISTER_DTL         0x0000400000000000ULL
 462 #define FLAGS_REGISTER_SLBSHADOW   0x0000600000000000ULL
 463 #define FLAGS_DEREGISTER_VPA       0x0000a00000000000ULL
 464 #define FLAGS_DEREGISTER_DTL       0x0000c00000000000ULL
 465 #define FLAGS_DEREGISTER_SLBSHADOW 0x0000e00000000000ULL
 466
 467 #define VPA_MIN_SIZE           640
 468 #define VPA_SIZE_OFFSET        0x4
 469 #define VPA_SHARED_PROC_OFFSET 0x9
 470 #define VPA_SHARED_PROC_VAL    0x2
 471
 472 static target_ulong register_vpa(CPUPPCState *env, target_ulong vpa)
 473 {
 474     CPUState *cs = CPU(ppc_env_get_cpu(env));
 475     uint16_t size;
 476     uint8_t tmp;
 477
 478     if (vpa == 0) {
 479         hcall_dprintf("Can't cope with registering a VPA at logical 0\n");
 480         return H_HARDWARE;
 481     }
 482
 483     if (vpa % env->dcache_line_size) {
 484         return H_PARAMETER;
 485     }
 486     /* FIXME: bounds check the address */
 487
 488     size = lduw_be_phys(cs->as, vpa + 0x4);
 489
 490     if (size < VPA_MIN_SIZE) {
 491         return H_PARAMETER;
 492     }
 493
 494     /* VPA is not allowed to cross a page boundary */
 495     if ((vpa / 4096) != ((vpa + size - 1) / 4096)) {
 496         return H_PARAMETER;
 497     }
 498
 499     env->vpa_addr = vpa;
 500
 501     tmp = ldub_phys(cs->as, env->vpa_addr + VPA_SHARED_PROC_OFFSET);
 502     tmp |= VPA_SHARED_PROC_VAL;
 503     stb_phys(cs->as, env->vpa_addr + VPA_SHARED_PROC_OFFSET, tmp);
 504
 505     return H_SUCCESS;
 506 }
 507
 508 static target_ulong deregister_vpa(CPUPPCState *env, target_ulong vpa)
 509 {
 510     if (env->slb_shadow_addr) {
 511         return H_RESOURCE;
 512     }
 513
 514     if (env->dtl_addr) {
 515         return H_RESOURCE;
 516     }
 517
 518     env->vpa_addr = 0;
 519     return H_SUCCESS;
 520 }
 521
 522 static target_ulong register_slb_shadow(CPUPPCState *env, target_ulong addr)
 523 {
 524     CPUState *cs = CPU(ppc_env_get_cpu(env));
 525     uint32_t size;
 526
 527     if (addr == 0) {
 528         hcall_dprintf("Can't cope with SLB shadow at logical 0\n");
 529         return H_HARDWARE;
 530     }
 531
 532     size = ldl_be_phys(cs->as, addr + 0x4);
 533     if (size < 0x8) {
 534         return H_PARAMETER;
 535     }
 536
 537     if ((addr / 4096) != ((addr + size - 1) / 4096)) {
 538         return H_PARAMETER;
 539     }
 540
 541     if (!env->vpa_addr) {
 542         return H_RESOURCE;
 543     }
 544
 545     env->slb_shadow_addr = addr;
 546     env->slb_shadow_size = size;
 547
 548     return H_SUCCESS;
 549 }
 550
 551 static target_ulong deregister_slb_shadow(CPUPPCState *env, target_ulong addr)
 552 {
 553     env->slb_shadow_addr = 0;
 554     env->slb_shadow_size = 0;
 555     return H_SUCCESS;
 556 }
 557
 558 static target_ulong register_dtl(CPUPPCState *env, target_ulong addr)
 559 {
 560     CPUState *cs = CPU(ppc_env_get_cpu(env));
 561     uint32_t size;
 562
 563     if (addr == 0) {
 564         hcall_dprintf("Can't cope with DTL at logical 0\n");
 565         return H_HARDWARE;
 566     }
 567
 568     size = ldl_be_phys(cs->as, addr + 0x4);
 569
 570     if (size < 48) {
 571         return H_PARAMETER;
 572     }
 573
 574     if (!env->vpa_addr) {
 575         return H_RESOURCE;
 576     }
 577
 578     env->dtl_addr = addr;
 579     env->dtl_size = size;
 580
 581     return H_SUCCESS;
 582 }
 583
 584 static target_ulong deregister_dtl(CPUPPCState *env, target_ulong addr)
 585 {
 586     env->dtl_addr = 0;
 587     env->dtl_size = 0;
 588
 589     return H_SUCCESS;
 590 }
 591
 592 static target_ulong h_register_vpa(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 593                                    target_ulong opcode, target_ulong *args)
 594 {
 595     target_ulong flags = args[0];
 596     target_ulong procno = args[1];
 597     target_ulong vpa = args[2];
 598     target_ulong ret = H_PARAMETER;
 599     CPUPPCState *tenv;
 600     PowerPCCPU *tcpu;
 601
 602     tcpu = ppc_get_vcpu_by_dt_id(procno);
 603     if (!tcpu) {
 604         return H_PARAMETER;
 605     }
 606     tenv = &tcpu->env;
 607
 608     switch (flags) {
 609     case FLAGS_REGISTER_VPA:
 610         ret = register_vpa(tenv, vpa);
 611         break;
 612
 613     case FLAGS_DEREGISTER_VPA:
 614         ret = deregister_vpa(tenv, vpa);
 615         break;
 616
 617     case FLAGS_REGISTER_SLBSHADOW:
 618         ret = register_slb_shadow(tenv, vpa);
 619         break;
 620
 621     case FLAGS_DEREGISTER_SLBSHADOW:
 622         ret = deregister_slb_shadow(tenv, vpa);
 623         break;
 624
 625     case FLAGS_REGISTER_DTL:
 626         ret = register_dtl(tenv, vpa);
 627         break;
 628
 629     case FLAGS_DEREGISTER_DTL:
 630         ret = deregister_dtl(tenv, vpa);
 631         break;
 632     }
 633
 634     return ret;
 635 }
 636
 637 static target_ulong h_cede(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 638                            target_ulong opcode, target_ulong *args)
 639 {
 640     CPUPPCState *env = &cpu->env;
 641     CPUState *cs = CPU(cpu);
 642
 643     env->msr |= (1ULL << MSR_EE);
 644     hreg_compute_hflags(env);
 645     if (!cpu_has_work(cs)) {
 646         cs->halted = 1;
 647         cs->exception_index = EXCP_HLT;
 648         cs->exit_request = 1;
 649     }
 650     return H_SUCCESS;
 651 }
 652
 653 static target_ulong h_rtas(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 654                            target_ulong opcode, target_ulong *args)
 655 {
 656     target_ulong rtas_r3 = args[0];
 657     uint32_t token = rtas_ld(rtas_r3, 0);
 658     uint32_t nargs = rtas_ld(rtas_r3, 1);
 659     uint32_t nret = rtas_ld(rtas_r3, 2);
 660
 661     return spapr_rtas_call(cpu, spapr, token, nargs, rtas_r3 + 12,
 662                            nret, rtas_r3 + 12 + 4*nargs);
 663 }
 664
 665 static target_ulong h_logical_load(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 666                                    target_ulong opcode, target_ulong *args)
 667 {
 668     CPUState *cs = CPU(cpu);
 669     target_ulong size = args[0];
 670     target_ulong addr = args[1];
 671
 672     switch (size) {
 673     case 1:
 674         args[0] = ldub_phys(cs->as, addr);
 675         return H_SUCCESS;
 676     case 2:
 677         args[0] = lduw_phys(cs->as, addr);
 678         return H_SUCCESS;
 679     case 4:
 680         args[0] = ldl_phys(cs->as, addr);
 681         return H_SUCCESS;
 682     case 8:
 683         args[0] = ldq_phys(cs->as, addr);
 684         return H_SUCCESS;
 685     }
 686     return H_PARAMETER;
 687 }
 688
 689 static target_ulong h_logical_store(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 690                                     target_ulong opcode, target_ulong *args)
 691 {
 692     CPUState *cs = CPU(cpu);
 693
 694     target_ulong size = args[0];
 695     target_ulong addr = args[1];
 696     target_ulong val  = args[2];
 697
 698     switch (size) {
 699     case 1:
 700         stb_phys(cs->as, addr, val);
 701         return H_SUCCESS;
 702     case 2:
 703         stw_phys(cs->as, addr, val);
 704         return H_SUCCESS;
 705     case 4:
 706         stl_phys(cs->as, addr, val);
 707         return H_SUCCESS;
 708     case 8:
 709         stq_phys(cs->as, addr, val);
 710         return H_SUCCESS;
 711     }
 712     return H_PARAMETER;
 713 }
 714
 715 static target_ulong h_logical_memop(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 716                                     target_ulong opcode, target_ulong *args)
 717 {
 718     CPUState *cs = CPU(cpu);
 719
 720     target_ulong dst   = args[0]; /* Destination address */
 721     target_ulong src   = args[1]; /* Source address */
 722     target_ulong esize = args[2]; /* Element size (0=1,1=2,2=4,3=8) */
 723     target_ulong count = args[3]; /* Element count */
 724     target_ulong op    = args[4]; /* 0 = copy, 1 = invert */
 725     uint64_t tmp;
 726     unsigned int mask = (1 << esize) - 1;
 727     int step = 1 << esize;
 728
 729     if (count > 0x80000000) {
 730         return H_PARAMETER;
 731     }
 732
 733     if ((dst & mask) || (src & mask) || (op > 1)) {
 734         return H_PARAMETER;
 735     }
 736
 737     if (dst >= src && dst < (src + (count << esize))) {
 738             dst = dst + ((count - 1) << esize);
 739             src = src + ((count - 1) << esize);
 740             step = -step;
 741     }
 742
 743     while (count--) {
 744         switch (esize) {
 745         case 0:
 746             tmp = ldub_phys(cs->as, src);
 747             break;
 748         case 1:
 749             tmp = lduw_phys(cs->as, src);
 750             break;
 751         case 2:
 752             tmp = ldl_phys(cs->as, src);
 753             break;
 754         case 3:
 755             tmp = ldq_phys(cs->as, src);
 756             break;
 757         default:
 758             return H_PARAMETER;
 759         }
 760         if (op == 1) {
 761             tmp = ~tmp;
 762         }
 763         switch (esize) {
 764         case 0:
 765             stb_phys(cs->as, dst, tmp);
 766             break;
 767         case 1:
 768             stw_phys(cs->as, dst, tmp);
 769             break;
 770         case 2:
 771             stl_phys(cs->as, dst, tmp);
 772             break;
 773         case 3:
 774             stq_phys(cs->as, dst, tmp);
 775             break;
 776         }
 777         dst = dst + step;
 778         src = src + step;
 779     }
 780
 781     return H_SUCCESS;
 782 }
 783
 784 static target_ulong h_logical_icbi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 785                                    target_ulong opcode, target_ulong *args)
 786 {
 787     /* Nothing to do on emulation, KVM will trap this in the kernel */
 788     return H_SUCCESS;
 789 }
 790
 791 static target_ulong h_logical_dcbf(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 792                                    target_ulong opcode, target_ulong *args)
 793 {
 794     /* Nothing to do on emulation, KVM will trap this in the kernel */
 795     return H_SUCCESS;
 796 }
 797
 798 static target_ulong h_set_mode_resource_le(PowerPCCPU *cpu,
 799                                            target_ulong mflags,
 800                                            target_ulong value1,
 801                                            target_ulong value2)
 802 {
 803     CPUState *cs;
 804
 805     if (value1) {
 806         return H_P3;
 807     }
 808     if (value2) {
 809         return H_P4;
 810     }
 811
 812     switch (mflags) {
 813     case H_SET_MODE_ENDIAN_BIG:
 814         CPU_FOREACH(cs) {
 815             set_spr(cs, SPR_LPCR, 0, LPCR_ILE);
 816         }
 817         spapr_pci_switch_vga(true);
 818         return H_SUCCESS;
 819
 820     case H_SET_MODE_ENDIAN_LITTLE:
 821         CPU_FOREACH(cs) {
 822             set_spr(cs, SPR_LPCR, LPCR_ILE, LPCR_ILE);
 823         }
 824         spapr_pci_switch_vga(false);
 825         return H_SUCCESS;
 826     }
 827
 828     return H_UNSUPPORTED_FLAG;
 829 }
 830
 831 static target_ulong h_set_mode_resource_addr_trans_mode(PowerPCCPU *cpu,
 832                                                         target_ulong mflags,
 833                                                         target_ulong value1,
 834                                                         target_ulong value2)
 835 {
 836     CPUState *cs;
 837     PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
 838
 839     if (!(pcc->insns_flags2 & PPC2_ISA207S)) {
 840         return H_P2;
 841     }
 842     if (value1) {
 843         return H_P3;
 844     }
 845     if (value2) {
 846         return H_P4;
 847     }
 848
 849     if (mflags == AIL_RESERVED) {
 850         return H_UNSUPPORTED_FLAG;
 851     }
 852
 853     CPU_FOREACH(cs) {
 854         set_spr(cs, SPR_LPCR, mflags << LPCR_AIL_SHIFT, LPCR_AIL);
 855     }
 856
 857     return H_SUCCESS;
 858 }
 859
 860 static target_ulong h_set_mode(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 861                                target_ulong opcode, target_ulong *args)
 862 {
 863     target_ulong resource = args[1];
 864     target_ulong ret = H_P2;
 865
 866     switch (resource) {
 867     case H_SET_MODE_RESOURCE_LE:
 868         ret = h_set_mode_resource_le(cpu, args[0], args[2], args[3]);
 869         break;
 870     case H_SET_MODE_RESOURCE_ADDR_TRANS_MODE:
 871         ret = h_set_mode_resource_addr_trans_mode(cpu, args[0],
 872                                                   args[2], args[3]);
 873         break;
 874     }
 875
 876     return ret;
 877 }
 878
 879 /*
 880  * Return the offset to the requested option vector @vector in the
 881  * option vector table @table.
 882  */
 883 static target_ulong cas_get_option_vector(int vector, target_ulong table)
 884 {
 885     int i;
 886     char nr_vectors, nr_entries;
 887
 888     if (!table) {
 889         return 0;
 890     }
 891
 892     nr_vectors = (ldl_phys(&address_space_memory, table) >> 24) + 1;
 893     if (!vector || vector > nr_vectors) {
 894         return 0;
 895     }
 896     table++; /* skip nr option vectors */
 897
 898     for (i = 0; i < vector - 1; i++) {
 899         nr_entries = ldl_phys(&address_space_memory, table) >> 24;
 900         table += nr_entries + 2;
 901     }
 902     return table;
 903 }
 904
 905 typedef struct {
 906     PowerPCCPU *cpu;
 907     uint32_t cpu_version;
 908     Error *err;
 909 } SetCompatState;
 910
 911 static void do_set_compat(void *arg)
 912 {
 913     SetCompatState *s = arg;
 914
 915     cpu_synchronize_state(CPU(s->cpu));
 916     ppc_set_compat(s->cpu, s->cpu_version, &s->err);
 917 }
 918
 919 #define get_compat_level(cpuver) ( \
 920     ((cpuver) == CPU_POWERPC_LOGICAL_2_05) ? 2050 : \
 921     ((cpuver) == CPU_POWERPC_LOGICAL_2_06) ? 2060 : \
 922     ((cpuver) == CPU_POWERPC_LOGICAL_2_06_PLUS) ? 2061 : \
 923     ((cpuver) == CPU_POWERPC_LOGICAL_2_07) ? 2070 : 0)
 924
 925 static void cas_handle_compat_cpu(PowerPCCPUClass *pcc, uint32_t pvr,
 926                                   unsigned max_lvl, unsigned *compat_lvl,
 927                                   unsigned *cpu_version)
 928 {
 929     unsigned lvl = get_compat_level(pvr);
 930     bool is205, is206;
 931
 932     if (!lvl) {
 933         return;
 934     }
 935
 936     /* If it is a logical PVR, try to determine the highest level */
 937     is205 = (pcc->pcr_supported & PCR_COMPAT_2_05) &&
 938             (lvl == get_compat_level(CPU_POWERPC_LOGICAL_2_05));
 939     is206 = (pcc->pcr_supported & PCR_COMPAT_2_06) &&
 940             ((lvl == get_compat_level(CPU_POWERPC_LOGICAL_2_06)) ||
 941              (lvl == get_compat_level(CPU_POWERPC_LOGICAL_2_06_PLUS)));
 942
 943     if (is205 || is206) {
 944         if (!max_lvl) {
 945             /* User did not set the level, choose the highest */
 946             if (*compat_lvl <= lvl) {
 947                 *compat_lvl = lvl;
 948                 *cpu_version = pvr;
 949             }
 950         } else if (max_lvl >= lvl) {
 951             /* User chose the level, don't set higher than this */
 952             *compat_lvl = lvl;
 953             *cpu_version = pvr;
 954         }
 955     }
 956 }
 957
 958 #define OV5_DRCONF_MEMORY 0x20
 959
 960 static target_ulong h_client_architecture_support(PowerPCCPU *cpu_,
 961                                                   sPAPRMachineState *spapr,
 962                                                   target_ulong opcode,
 963                                                   target_ulong *args)
 964 {
 965     target_ulong list = ppc64_phys_to_real(args[0]);
 966     target_ulong ov_table, ov5;
 967     PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu_);
 968     CPUState *cs;
 969     bool cpu_match = false, cpu_update = true, memory_update = false;
 970     unsigned old_cpu_version = cpu_->cpu_version;
 971     unsigned compat_lvl = 0, cpu_version = 0;
 972     unsigned max_lvl = get_compat_level(cpu_->max_compat);
 973     int counter;
 974     char ov5_byte2;
 975
 976     /* Parse PVR list */
 977     for (counter = 0; counter < 512; ++counter) {
 978         uint32_t pvr, pvr_mask;
 979
 980         pvr_mask = ldl_be_phys(&address_space_memory, list);
 981         list += 4;
 982         pvr = ldl_be_phys(&address_space_memory, list);
 983         list += 4;
 984
 985         trace_spapr_cas_pvr_try(pvr);
 986         if (!max_lvl &&
 987             ((cpu_->env.spr[SPR_PVR] & pvr_mask) == (pvr & pvr_mask))) {
 988             cpu_match = true;
 989             cpu_version = 0;
 990         } else if (pvr == cpu_->cpu_version) {
 991             cpu_match = true;
 992             cpu_version = cpu_->cpu_version;
 993         } else if (!cpu_match) {
 994             cas_handle_compat_cpu(pcc, pvr, max_lvl, &compat_lvl, &cpu_version);
 995         }
 996         /* Terminator record */
 997         if (~pvr_mask & pvr) {
 998             break;
 999         }
1000     }
1001
1002     /* Parsing finished */
1003     trace_spapr_cas_pvr(cpu_->cpu_version, cpu_match,
1004                         cpu_version, pcc->pcr_mask);
1005
1006     /* Update CPUs */
1007     if (old_cpu_version != cpu_version) {
1008         CPU_FOREACH(cs) {
1009             SetCompatState s = {
1010                 .cpu = POWERPC_CPU(cs),
1011                 .cpu_version = cpu_version,
1012                 .err = NULL,
1013             };
1014
1015             run_on_cpu(cs, do_set_compat, &s);
1016
1017             if (s.err) {
1018                 error_report_err(s.err);
1019                 return H_HARDWARE;
1020             }
1021         }
1022     }
1023
1024     if (!cpu_version) {
1025         cpu_update = false;
1026     }
1027
1028     /* For the future use: here @ov_table points to the first option vector */
1029     ov_table = list;
1030
1031     ov5 = cas_get_option_vector(5, ov_table);
1032     if (!ov5) {
1033         return H_SUCCESS;
1034     }
1035
1036     /* @list now points to OV 5 */
1037     ov5_byte2 = ldub_phys(&address_space_memory, ov5 + 2);
1038     if (ov5_byte2 & OV5_DRCONF_MEMORY) {
1039         memory_update = true;
1040     }
1041
1042     if (spapr_h_cas_compose_response(spapr, args[1], args[2],
1043                                      cpu_update, memory_update)) {
1044         qemu_system_reset_request();
1045     }
1046
1047     return H_SUCCESS;
1048 }
1049
1050 static spapr_hcall_fn papr_hypercall_table[(MAX_HCALL_OPCODE / 4) + 1];
1051 static spapr_hcall_fn kvmppc_hypercall_table[KVMPPC_HCALL_MAX - KVMPPC_HCALL_BASE + 1];
1052
1053 void spapr_register_hypercall(target_ulong opcode, spapr_hcall_fn fn)
1054 {
1055     spapr_hcall_fn *slot;
1056
1057     if (opcode <= MAX_HCALL_OPCODE) {
1058         assert((opcode & 0x3) == 0);
1059
1060         slot = &papr_hypercall_table[opcode / 4];
1061     } else {
1062         assert((opcode >= KVMPPC_HCALL_BASE) && (opcode <= KVMPPC_HCALL_MAX));
1063
1064         slot = &kvmppc_hypercall_table[opcode - KVMPPC_HCALL_BASE];
1065     }
1066
1067     assert(!(*slot));
1068     *slot = fn;
1069 }
1070
1071 target_ulong spapr_hypercall(PowerPCCPU *cpu, target_ulong opcode,
1072                              target_ulong *args)
1073 {
1074     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
1075
1076     if ((opcode <= MAX_HCALL_OPCODE)
1077         && ((opcode & 0x3) == 0)) {
1078         spapr_hcall_fn fn = papr_hypercall_table[opcode / 4];
1079
1080         if (fn) {
1081             return fn(cpu, spapr, opcode, args);
1082         }
1083     } else if ((opcode >= KVMPPC_HCALL_BASE) &&
1084                (opcode <= KVMPPC_HCALL_MAX)) {
1085         spapr_hcall_fn fn = kvmppc_hypercall_table[opcode - KVMPPC_HCALL_BASE];
1086
1087         if (fn) {
1088             return fn(cpu, spapr, opcode, args);
1089         }
1090     }
1091
1092     qemu_log_mask(LOG_UNIMP, "Unimplemented SPAPR hcall 0x" TARGET_FMT_lx "\n",
1093                   opcode);
1094     return H_FUNCTION;
1095 }
1096
1097 static void hypercall_register_types(void)
1098 {
1099     /* hcall-pft */
1100     spapr_register_hypercall(H_ENTER, h_enter);
1101     spapr_register_hypercall(H_REMOVE, h_remove);
1102     spapr_register_hypercall(H_PROTECT, h_protect);
1103     spapr_register_hypercall(H_READ, h_read);
1104
1105     /* hcall-bulk */
1106     spapr_register_hypercall(H_BULK_REMOVE, h_bulk_remove);
1107
1108     /* hcall-splpar */
1109     spapr_register_hypercall(H_REGISTER_VPA, h_register_vpa);
1110     spapr_register_hypercall(H_CEDE, h_cede);
1111
1112     /* processor register resource access h-calls */
1113     spapr_register_hypercall(H_SET_SPRG0, h_set_sprg0);
1114     spapr_register_hypercall(H_SET_DABR, h_set_dabr);
1115     spapr_register_hypercall(H_SET_XDABR, h_set_xdabr);
1116     spapr_register_hypercall(H_PAGE_INIT, h_page_init);
1117     spapr_register_hypercall(H_SET_MODE, h_set_mode);
1118
1119     /* "debugger" hcalls (also used by SLOF). Note: We do -not- differenciate
1120      * here between the "CI" and the "CACHE" variants, they will use whatever
1121      * mapping attributes qemu is using. When using KVM, the kernel will
1122      * enforce the attributes more strongly
1123      */
1124     spapr_register_hypercall(H_LOGICAL_CI_LOAD, h_logical_load);
1125     spapr_register_hypercall(H_LOGICAL_CI_STORE, h_logical_store);
1126     spapr_register_hypercall(H_LOGICAL_CACHE_LOAD, h_logical_load);
1127     spapr_register_hypercall(H_LOGICAL_CACHE_STORE, h_logical_store);
1128     spapr_register_hypercall(H_LOGICAL_ICBI, h_logical_icbi);
1129     spapr_register_hypercall(H_LOGICAL_DCBF, h_logical_dcbf);
1130     spapr_register_hypercall(KVMPPC_H_LOGICAL_MEMOP, h_logical_memop);
1131
1132     /* qemu/KVM-PPC specific hcalls */
1133     spapr_register_hypercall(KVMPPC_H_RTAS, h_rtas);
1134
1135     /* ibm,client-architecture-support support */
1136     spapr_register_hypercall(KVMPPC_H_CAS, h_client_architecture_support);
1137 }
1138
1139 type_init(hypercall_register_types)