target-s390x/misc_helper.c

   1 /*
   2  *  S/390 misc helper routines
   3  *
   4  *  Copyright (c) 2009 Ulrich Hecht
   5  *  Copyright (c) 2009 Alexander Graf
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "cpu.h"
  22 #include "exec/memory.h"
  23 #include "qemu/host-utils.h"
  24 #include "exec/helper-proto.h"
  25 #include <string.h>
  26 #include "sysemu/kvm.h"
  27 #include "qemu/timer.h"
  28 #include "exec/address-spaces.h"
  29 #ifdef CONFIG_KVM
  30 #include <linux/kvm.h>
  31 #endif
  32 #include "exec/cpu_ldst.h"
  33 #include "hw/watchdog/wdt_diag288.h"
  34
  35 #if !defined(CONFIG_USER_ONLY)
  36 #include "sysemu/cpus.h"
  37 #include "sysemu/sysemu.h"
  38 #include "hw/s390x/ebcdic.h"
  39 #include "hw/s390x/ipl.h"
  40 #endif
  41
  42 /* #define DEBUG_HELPER */
  43 #ifdef DEBUG_HELPER
  44 #define HELPER_LOG(x...) qemu_log(x)
  45 #else
  46 #define HELPER_LOG(x...)
  47 #endif
  48
  49 /* Raise an exception dynamically from a helper function.  */
  50 void QEMU_NORETURN runtime_exception(CPUS390XState *env, int excp,
  51                                      uintptr_t retaddr)
  52 {
  53     CPUState *cs = CPU(s390_env_get_cpu(env));
  54     int t;
  55
  56     cs->exception_index = EXCP_PGM;
  57     env->int_pgm_code = excp;
  58
  59     /* Use the (ultimate) callers address to find the insn that trapped.  */
  60     cpu_restore_state(cs, retaddr);
  61
  62     /* Advance past the insn.  */
  63     t = cpu_ldub_code(env, env->psw.addr);
  64     env->int_pgm_ilen = t = get_ilen(t);
  65     env->psw.addr += t;
  66
  67     cpu_loop_exit(cs);
  68 }
  69
  70 /* Raise an exception statically from a TB.  */
  71 void HELPER(exception)(CPUS390XState *env, uint32_t excp)
  72 {
  73     CPUState *cs = CPU(s390_env_get_cpu(env));
  74
  75     HELPER_LOG("%s: exception %d\n", __func__, excp);
  76     cs->exception_index = excp;
  77     cpu_loop_exit(cs);
  78 }
  79
  80 #ifndef CONFIG_USER_ONLY
  81
  82 void program_interrupt(CPUS390XState *env, uint32_t code, int ilen)
  83 {
  84     S390CPU *cpu = s390_env_get_cpu(env);
  85
  86     qemu_log_mask(CPU_LOG_INT, "program interrupt at %#" PRIx64 "\n",
  87                   env->psw.addr);
  88
  89     if (kvm_enabled()) {
  90 #ifdef CONFIG_KVM
  91         struct kvm_s390_irq irq = {
  92             .type = KVM_S390_PROGRAM_INT,
  93             .u.pgm.code = code,
  94         };
  95
  96         kvm_s390_vcpu_interrupt(cpu, &irq);
  97 #endif
  98     } else {
  99         CPUState *cs = CPU(cpu);
 100
 101         env->int_pgm_code = code;
 102         env->int_pgm_ilen = ilen;
 103         cs->exception_index = EXCP_PGM;
 104         cpu_loop_exit(cs);
 105     }
 106 }
 107
 108 /* SCLP service call */
 109 uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2)
 110 {
 111     int r = sclp_service_call(env, r1, r2);
 112     if (r < 0) {
 113         program_interrupt(env, -r, 4);
 114         return 0;
 115     }
 116     return r;
 117 }
 118
 119 #ifndef CONFIG_USER_ONLY
 120 static int modified_clear_reset(S390CPU *cpu)
 121 {
 122     S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
 123     CPUState *t;
 124
 125     pause_all_vcpus();
 126     cpu_synchronize_all_states();
 127     CPU_FOREACH(t) {
 128         run_on_cpu(t, s390_do_cpu_full_reset, t);
 129     }
 130     cmma_reset(cpu);
 131     io_subsystem_reset();
 132     scc->load_normal(CPU(cpu));
 133     cpu_synchronize_all_post_reset();
 134     resume_all_vcpus();
 135     return 0;
 136 }
 137
 138 static int load_normal_reset(S390CPU *cpu)
 139 {
 140     S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
 141     CPUState *t;
 142
 143     pause_all_vcpus();
 144     cpu_synchronize_all_states();
 145     CPU_FOREACH(t) {
 146         run_on_cpu(t, s390_do_cpu_reset, t);
 147     }
 148     cmma_reset(cpu);
 149     io_subsystem_reset();
 150     scc->initial_cpu_reset(CPU(cpu));
 151     scc->load_normal(CPU(cpu));
 152     cpu_synchronize_all_post_reset();
 153     resume_all_vcpus();
 154     return 0;
 155 }
 156
 157 int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3)
 158 {
 159     uint64_t func = env->regs[r1];
 160     uint64_t timeout = env->regs[r1 + 1];
 161     uint64_t action = env->regs[r3];
 162     Object *obj;
 163     DIAG288State *diag288;
 164     DIAG288Class *diag288_class;
 165
 166     if (r1 % 2 || action != 0) {
 167         return -1;
 168     }
 169
 170     /* Timeout must be more than 15 seconds except for timer deletion */
 171     if (func != WDT_DIAG288_CANCEL && timeout < 15) {
 172         return -1;
 173     }
 174
 175     obj = object_resolve_path_type("", TYPE_WDT_DIAG288, NULL);
 176     if (!obj) {
 177         return -1;
 178     }
 179
 180     diag288 = DIAG288(obj);
 181     diag288_class = DIAG288_GET_CLASS(diag288);
 182     return diag288_class->handle_timer(diag288, func, timeout);
 183 }
 184
 185 #define DIAG_308_RC_OK              0x0001
 186 #define DIAG_308_RC_NO_CONF         0x0102
 187 #define DIAG_308_RC_INVALID         0x0402
 188
 189 void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3)
 190 {
 191     uint64_t addr =  env->regs[r1];
 192     uint64_t subcode = env->regs[r3];
 193     IplParameterBlock *iplb;
 194
 195     if (env->psw.mask & PSW_MASK_PSTATE) {
 196         program_interrupt(env, PGM_PRIVILEGED, ILEN_LATER_INC);
 197         return;
 198     }
 199
 200     if ((subcode & ~0x0ffffULL) || (subcode > 6)) {
 201         program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
 202         return;
 203     }
 204
 205     switch (subcode) {
 206     case 0:
 207         modified_clear_reset(s390_env_get_cpu(env));
 208         if (tcg_enabled()) {
 209             cpu_loop_exit(CPU(s390_env_get_cpu(env)));
 210         }
 211         break;
 212     case 1:
 213         load_normal_reset(s390_env_get_cpu(env));
 214         if (tcg_enabled()) {
 215             cpu_loop_exit(CPU(s390_env_get_cpu(env)));
 216         }
 217         break;
 218     case 3:
 219         s390_reipl_request();
 220         if (tcg_enabled()) {
 221             cpu_loop_exit(CPU(s390_env_get_cpu(env)));
 222         }
 223         break;
 224     case 5:
 225         if ((r1 & 1) || (addr & 0x0fffULL)) {
 226             program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
 227             return;
 228         }
 229         if (!address_space_access_valid(&address_space_memory, addr,
 230                                         sizeof(IplParameterBlock), false)) {
 231             program_interrupt(env, PGM_ADDRESSING, ILEN_LATER_INC);
 232             return;
 233         }
 234         iplb = g_malloc0(sizeof(struct IplParameterBlock));
 235         cpu_physical_memory_read(addr, iplb, sizeof(struct IplParameterBlock));
 236         if (!s390_ipl_update_diag308(iplb)) {
 237             env->regs[r1 + 1] = DIAG_308_RC_OK;
 238         } else {
 239             env->regs[r1 + 1] = DIAG_308_RC_INVALID;
 240         }
 241         g_free(iplb);
 242         return;
 243     case 6:
 244         if ((r1 & 1) || (addr & 0x0fffULL)) {
 245             program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
 246             return;
 247         }
 248         if (!address_space_access_valid(&address_space_memory, addr,
 249                                         sizeof(IplParameterBlock), true)) {
 250             program_interrupt(env, PGM_ADDRESSING, ILEN_LATER_INC);
 251             return;
 252         }
 253         iplb = s390_ipl_get_iplb();
 254         if (iplb) {
 255             cpu_physical_memory_write(addr, iplb,
 256                                       sizeof(struct IplParameterBlock));
 257             env->regs[r1 + 1] = DIAG_308_RC_OK;
 258         } else {
 259             env->regs[r1 + 1] = DIAG_308_RC_NO_CONF;
 260         }
 261         return;
 262     default:
 263         hw_error("Unhandled diag308 subcode %" PRIx64, subcode);
 264         break;
 265     }
 266 }
 267 #endif
 268
 269 void HELPER(diag)(CPUS390XState *env, uint32_t r1, uint32_t r3, uint32_t num)
 270 {
 271     uint64_t r;
 272
 273     switch (num) {
 274     case 0x500:
 275         /* KVM hypercall */
 276         r = s390_virtio_hypercall(env);
 277         break;
 278     case 0x44:
 279         /* yield */
 280         r = 0;
 281         break;
 282     case 0x308:
 283         /* ipl */
 284         handle_diag_308(env, r1, r3);
 285         r = 0;
 286         break;
 287     default:
 288         r = -1;
 289         break;
 290     }
 291
 292     if (r) {
 293         program_interrupt(env, PGM_OPERATION, ILEN_LATER_INC);
 294     }
 295 }
 296
 297 /* Set Prefix */
 298 void HELPER(spx)(CPUS390XState *env, uint64_t a1)
 299 {
 300     CPUState *cs = CPU(s390_env_get_cpu(env));
 301     uint32_t prefix = a1 & 0x7fffe000;
 302
 303     env->psa = prefix;
 304     qemu_log("prefix: %#x\n", prefix);
 305     tlb_flush_page(cs, 0);
 306     tlb_flush_page(cs, TARGET_PAGE_SIZE);
 307 }
 308
 309 /* Store Clock */
 310 uint64_t HELPER(stck)(CPUS390XState *env)
 311 {
 312     uint64_t time;
 313
 314     time = env->tod_offset +
 315         time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - env->tod_basetime);
 316
 317     return time;
 318 }
 319
 320 /* Set Clock Comparator */
 321 void HELPER(sckc)(CPUS390XState *env, uint64_t time)
 322 {
 323     if (time == -1ULL) {
 324         return;
 325     }
 326
 327     env->ckc = time;
 328
 329     /* difference between origins */
 330     time -= env->tod_offset;
 331
 332     /* nanoseconds */
 333     time = tod2time(time);
 334
 335     timer_mod(env->tod_timer, env->tod_basetime + time);
 336 }
 337
 338 /* Store Clock Comparator */
 339 uint64_t HELPER(stckc)(CPUS390XState *env)
 340 {
 341     return env->ckc;
 342 }
 343
 344 /* Set CPU Timer */
 345 void HELPER(spt)(CPUS390XState *env, uint64_t time)
 346 {
 347     if (time == -1ULL) {
 348         return;
 349     }
 350
 351     /* nanoseconds */
 352     time = tod2time(time);
 353
 354     env->cputm = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time;
 355
 356     timer_mod(env->cpu_timer, env->cputm);
 357 }
 358
 359 /* Store CPU Timer */
 360 uint64_t HELPER(stpt)(CPUS390XState *env)
 361 {
 362     return time2tod(env->cputm - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
 363 }
 364
 365 /* Store System Information */
 366 uint32_t HELPER(stsi)(CPUS390XState *env, uint64_t a0,
 367                       uint64_t r0, uint64_t r1)
 368 {
 369     int cc = 0;
 370     int sel1, sel2;
 371
 372     if ((r0 & STSI_LEVEL_MASK) <= STSI_LEVEL_3 &&
 373         ((r0 & STSI_R0_RESERVED_MASK) || (r1 & STSI_R1_RESERVED_MASK))) {
 374         /* valid function code, invalid reserved bits */
 375         program_interrupt(env, PGM_SPECIFICATION, 2);
 376     }
 377
 378     sel1 = r0 & STSI_R0_SEL1_MASK;
 379     sel2 = r1 & STSI_R1_SEL2_MASK;
 380
 381     /* XXX: spec exception if sysib is not 4k-aligned */
 382
 383     switch (r0 & STSI_LEVEL_MASK) {
 384     case STSI_LEVEL_1:
 385         if ((sel1 == 1) && (sel2 == 1)) {
 386             /* Basic Machine Configuration */
 387             struct sysib_111 sysib;
 388
 389             memset(&sysib, 0, sizeof(sysib));
 390             ebcdic_put(sysib.manuf, "QEMU            ", 16);
 391             /* same as machine type number in STORE CPU ID */
 392             ebcdic_put(sysib.type, "QEMU", 4);
 393             /* same as model number in STORE CPU ID */
 394             ebcdic_put(sysib.model, "QEMU            ", 16);
 395             ebcdic_put(sysib.sequence, "QEMU            ", 16);
 396             ebcdic_put(sysib.plant, "QEMU", 4);
 397             cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
 398         } else if ((sel1 == 2) && (sel2 == 1)) {
 399             /* Basic Machine CPU */
 400             struct sysib_121 sysib;
 401
 402             memset(&sysib, 0, sizeof(sysib));
 403             /* XXX make different for different CPUs? */
 404             ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16);
 405             ebcdic_put(sysib.plant, "QEMU", 4);
 406             stw_p(&sysib.cpu_addr, env->cpu_num);
 407             cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
 408         } else if ((sel1 == 2) && (sel2 == 2)) {
 409             /* Basic Machine CPUs */
 410             struct sysib_122 sysib;
 411
 412             memset(&sysib, 0, sizeof(sysib));
 413             stl_p(&sysib.capability, 0x443afc29);
 414             /* XXX change when SMP comes */
 415             stw_p(&sysib.total_cpus, 1);
 416             stw_p(&sysib.active_cpus, 1);
 417             stw_p(&sysib.standby_cpus, 0);
 418             stw_p(&sysib.reserved_cpus, 0);
 419             cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
 420         } else {
 421             cc = 3;
 422         }
 423         break;
 424     case STSI_LEVEL_2:
 425         {
 426             if ((sel1 == 2) && (sel2 == 1)) {
 427                 /* LPAR CPU */
 428                 struct sysib_221 sysib;
 429
 430                 memset(&sysib, 0, sizeof(sysib));
 431                 /* XXX make different for different CPUs? */
 432                 ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16);
 433                 ebcdic_put(sysib.plant, "QEMU", 4);
 434                 stw_p(&sysib.cpu_addr, env->cpu_num);
 435                 stw_p(&sysib.cpu_id, 0);
 436                 cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
 437             } else if ((sel1 == 2) && (sel2 == 2)) {
 438                 /* LPAR CPUs */
 439                 struct sysib_222 sysib;
 440
 441                 memset(&sysib, 0, sizeof(sysib));
 442                 stw_p(&sysib.lpar_num, 0);
 443                 sysib.lcpuc = 0;
 444                 /* XXX change when SMP comes */
 445                 stw_p(&sysib.total_cpus, 1);
 446                 stw_p(&sysib.conf_cpus, 1);
 447                 stw_p(&sysib.standby_cpus, 0);
 448                 stw_p(&sysib.reserved_cpus, 0);
 449                 ebcdic_put(sysib.name, "QEMU    ", 8);
 450                 stl_p(&sysib.caf, 1000);
 451                 stw_p(&sysib.dedicated_cpus, 0);
 452                 stw_p(&sysib.shared_cpus, 0);
 453                 cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
 454             } else {
 455                 cc = 3;
 456             }
 457             break;
 458         }
 459     case STSI_LEVEL_3:
 460         {
 461             if ((sel1 == 2) && (sel2 == 2)) {
 462                 /* VM CPUs */
 463                 struct sysib_322 sysib;
 464
 465                 memset(&sysib, 0, sizeof(sysib));
 466                 sysib.count = 1;
 467                 /* XXX change when SMP comes */
 468                 stw_p(&sysib.vm[0].total_cpus, 1);
 469                 stw_p(&sysib.vm[0].conf_cpus, 1);
 470                 stw_p(&sysib.vm[0].standby_cpus, 0);
 471                 stw_p(&sysib.vm[0].reserved_cpus, 0);
 472                 ebcdic_put(sysib.vm[0].name, "KVMguest", 8);
 473                 stl_p(&sysib.vm[0].caf, 1000);
 474                 ebcdic_put(sysib.vm[0].cpi, "KVM/Linux       ", 16);
 475                 cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
 476             } else {
 477                 cc = 3;
 478             }
 479             break;
 480         }
 481     case STSI_LEVEL_CURRENT:
 482         env->regs[0] = STSI_LEVEL_3;
 483         break;
 484     default:
 485         cc = 3;
 486         break;
 487     }
 488
 489     return cc;
 490 }
 491
 492 uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t order_code, uint32_t r1,
 493                       uint64_t cpu_addr)
 494 {
 495     int cc = SIGP_CC_ORDER_CODE_ACCEPTED;
 496
 497     HELPER_LOG("%s: %016" PRIx64 " %08x %016" PRIx64 "\n",
 498                __func__, order_code, r1, cpu_addr);
 499
 500     /* Remember: Use "R1 or R1 + 1, whichever is the odd-numbered register"
 501        as parameter (input). Status (output) is always R1. */
 502
 503     switch (order_code) {
 504     case SIGP_SET_ARCH:
 505         /* switch arch */
 506         break;
 507     case SIGP_SENSE:
 508         /* enumerate CPU status */
 509         if (cpu_addr) {
 510             /* XXX implement when SMP comes */
 511             return 3;
 512         }
 513         env->regs[r1] &= 0xffffffff00000000ULL;
 514         cc = 1;
 515         break;
 516 #if !defined(CONFIG_USER_ONLY)
 517     case SIGP_RESTART:
 518         qemu_system_reset_request();
 519         cpu_loop_exit(CPU(s390_env_get_cpu(env)));
 520         break;
 521     case SIGP_STOP:
 522         qemu_system_shutdown_request();
 523         cpu_loop_exit(CPU(s390_env_get_cpu(env)));
 524         break;
 525 #endif
 526     default:
 527         /* unknown sigp */
 528         fprintf(stderr, "XXX unknown sigp: 0x%" PRIx64 "\n", order_code);
 529         cc = SIGP_CC_NOT_OPERATIONAL;
 530     }
 531
 532     return cc;
 533 }
 534 #endif
 535
 536 #ifndef CONFIG_USER_ONLY
 537 void HELPER(xsch)(CPUS390XState *env, uint64_t r1)
 538 {
 539     S390CPU *cpu = s390_env_get_cpu(env);
 540     ioinst_handle_xsch(cpu, r1);
 541 }
 542
 543 void HELPER(csch)(CPUS390XState *env, uint64_t r1)
 544 {
 545     S390CPU *cpu = s390_env_get_cpu(env);
 546     ioinst_handle_csch(cpu, r1);
 547 }
 548
 549 void HELPER(hsch)(CPUS390XState *env, uint64_t r1)
 550 {
 551     S390CPU *cpu = s390_env_get_cpu(env);
 552     ioinst_handle_hsch(cpu, r1);
 553 }
 554
 555 void HELPER(msch)(CPUS390XState *env, uint64_t r1, uint64_t inst)
 556 {
 557     S390CPU *cpu = s390_env_get_cpu(env);
 558     ioinst_handle_msch(cpu, r1, inst >> 16);
 559 }
 560
 561 void HELPER(rchp)(CPUS390XState *env, uint64_t r1)
 562 {
 563     S390CPU *cpu = s390_env_get_cpu(env);
 564     ioinst_handle_rchp(cpu, r1);
 565 }
 566
 567 void HELPER(rsch)(CPUS390XState *env, uint64_t r1)
 568 {
 569     S390CPU *cpu = s390_env_get_cpu(env);
 570     ioinst_handle_rsch(cpu, r1);
 571 }
 572
 573 void HELPER(ssch)(CPUS390XState *env, uint64_t r1, uint64_t inst)
 574 {
 575     S390CPU *cpu = s390_env_get_cpu(env);
 576     ioinst_handle_ssch(cpu, r1, inst >> 16);
 577 }
 578
 579 void HELPER(stsch)(CPUS390XState *env, uint64_t r1, uint64_t inst)
 580 {
 581     S390CPU *cpu = s390_env_get_cpu(env);
 582     ioinst_handle_stsch(cpu, r1, inst >> 16);
 583 }
 584
 585 void HELPER(tsch)(CPUS390XState *env, uint64_t r1, uint64_t inst)
 586 {
 587     S390CPU *cpu = s390_env_get_cpu(env);
 588     ioinst_handle_tsch(cpu, r1, inst >> 16);
 589 }
 590
 591 void HELPER(chsc)(CPUS390XState *env, uint64_t inst)
 592 {
 593     S390CPU *cpu = s390_env_get_cpu(env);
 594     ioinst_handle_chsc(cpu, inst >> 16);
 595 }
 596 #endif
 597
 598 #ifndef CONFIG_USER_ONLY
 599 void HELPER(per_check_exception)(CPUS390XState *env)
 600 {
 601     CPUState *cs = CPU(s390_env_get_cpu(env));
 602
 603     if (env->per_perc_atmid) {
 604         env->int_pgm_code = PGM_PER;
 605         env->int_pgm_ilen = get_ilen(cpu_ldub_code(env, env->per_address));
 606
 607         cs->exception_index = EXCP_PGM;
 608         cpu_loop_exit(cs);
 609     }
 610 }
 611
 612 void HELPER(per_branch)(CPUS390XState *env, uint64_t from, uint64_t to)
 613 {
 614     if ((env->cregs[9] & PER_CR9_EVENT_BRANCH)) {
 615         if (!(env->cregs[9] & PER_CR9_CONTROL_BRANCH_ADDRESS)
 616             || get_per_in_range(env, to)) {
 617             env->per_address = from;
 618             env->per_perc_atmid = PER_CODE_EVENT_BRANCH | get_per_atmid(env);
 619         }
 620     }
 621 }
 622
 623 void HELPER(per_ifetch)(CPUS390XState *env, uint64_t addr)
 624 {
 625     if ((env->cregs[9] & PER_CR9_EVENT_IFETCH) && get_per_in_range(env, addr)) {
 626         env->per_address = addr;
 627         env->per_perc_atmid = PER_CODE_EVENT_IFETCH | get_per_atmid(env);
 628
 629         /* If the instruction has to be nullified, trigger the
 630            exception immediately. */
 631         if (env->cregs[9] & PER_CR9_EVENT_NULLIFICATION) {
 632             CPUState *cs = CPU(s390_env_get_cpu(env));
 633
 634             env->int_pgm_code = PGM_PER;
 635             env->int_pgm_ilen = get_ilen(cpu_ldub_code(env, addr));
 636
 637             cs->exception_index = EXCP_PGM;
 638             cpu_loop_exit(cs);
 639         }
 640     }
 641 }
 642 #endif