target-s390x/ioinst.c

   1 /*
   2  * I/O instructions for S/390
   3  *
   4  * Copyright 2012 IBM Corp.
   5  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   8  * your option) any later version. See the COPYING file in the top-level
   9  * directory.
  10  */
  11
  12 #include <sys/types.h>
  13
  14 #include "cpu.h"
  15 #include "ioinst.h"
  16 #include "trace.h"
  17
  18 int ioinst_disassemble_sch_ident(uint32_t value, int *m, int *cssid, int *ssid,
  19                                  int *schid)
  20 {
  21     if (!IOINST_SCHID_ONE(value)) {
  22         return -EINVAL;
  23     }
  24     if (!IOINST_SCHID_M(value)) {
  25         if (IOINST_SCHID_CSSID(value)) {
  26             return -EINVAL;
  27         }
  28         *cssid = 0;
  29         *m = 0;
  30     } else {
  31         *cssid = IOINST_SCHID_CSSID(value);
  32         *m = 1;
  33     }
  34     *ssid = IOINST_SCHID_SSID(value);
  35     *schid = IOINST_SCHID_NR(value);
  36     return 0;
  37 }
  38
  39 void ioinst_handle_xsch(S390CPU *cpu, uint64_t reg1)
  40 {
  41     int cssid, ssid, schid, m;
  42     SubchDev *sch;
  43     int ret = -ENODEV;
  44     int cc;
  45
  46     if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
  47         program_interrupt(&cpu->env, PGM_OPERAND, 2);
  48         return;
  49     }
  50     trace_ioinst_sch_id("xsch", cssid, ssid, schid);
  51     sch = css_find_subch(m, cssid, ssid, schid);
  52     if (sch && css_subch_visible(sch)) {
  53         ret = css_do_xsch(sch);
  54     }
  55     switch (ret) {
  56     case -ENODEV:
  57         cc = 3;
  58         break;
  59     case -EBUSY:
  60         cc = 2;
  61         break;
  62     case 0:
  63         cc = 0;
  64         break;
  65     default:
  66         cc = 1;
  67         break;
  68     }
  69     setcc(cpu, cc);
  70 }
  71
  72 void ioinst_handle_csch(S390CPU *cpu, uint64_t reg1)
  73 {
  74     int cssid, ssid, schid, m;
  75     SubchDev *sch;
  76     int ret = -ENODEV;
  77     int cc;
  78
  79     if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
  80         program_interrupt(&cpu->env, PGM_OPERAND, 2);
  81         return;
  82     }
  83     trace_ioinst_sch_id("csch", cssid, ssid, schid);
  84     sch = css_find_subch(m, cssid, ssid, schid);
  85     if (sch && css_subch_visible(sch)) {
  86         ret = css_do_csch(sch);
  87     }
  88     if (ret == -ENODEV) {
  89         cc = 3;
  90     } else {
  91         cc = 0;
  92     }
  93     setcc(cpu, cc);
  94 }
  95
  96 void ioinst_handle_hsch(S390CPU *cpu, uint64_t reg1)
  97 {
  98     int cssid, ssid, schid, m;
  99     SubchDev *sch;
 100     int ret = -ENODEV;
 101     int cc;
 102
 103     if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
 104         program_interrupt(&cpu->env, PGM_OPERAND, 2);
 105         return;
 106     }
 107     trace_ioinst_sch_id("hsch", cssid, ssid, schid);
 108     sch = css_find_subch(m, cssid, ssid, schid);
 109     if (sch && css_subch_visible(sch)) {
 110         ret = css_do_hsch(sch);
 111     }
 112     switch (ret) {
 113     case -ENODEV:
 114         cc = 3;
 115         break;
 116     case -EBUSY:
 117         cc = 2;
 118         break;
 119     case 0:
 120         cc = 0;
 121         break;
 122     default:
 123         cc = 1;
 124         break;
 125     }
 126     setcc(cpu, cc);
 127 }
 128
 129 static int ioinst_schib_valid(SCHIB *schib)
 130 {
 131     if ((schib->pmcw.flags & PMCW_FLAGS_MASK_INVALID) ||
 132         (schib->pmcw.chars & PMCW_CHARS_MASK_INVALID)) {
 133         return 0;
 134     }
 135     /* Disallow extended measurements for now. */
 136     if (schib->pmcw.chars & PMCW_CHARS_MASK_XMWME) {
 137         return 0;
 138     }
 139     return 1;
 140 }
 141
 142 void ioinst_handle_msch(S390CPU *cpu, uint64_t reg1, uint32_t ipb)
 143 {
 144     int cssid, ssid, schid, m;
 145     SubchDev *sch;
 146     SCHIB *schib;
 147     uint64_t addr;
 148     int ret = -ENODEV;
 149     int cc;
 150     hwaddr len = sizeof(*schib);
 151     CPUS390XState *env = &cpu->env;
 152
 153     addr = decode_basedisp_s(env, ipb);
 154     if (addr & 3) {
 155         program_interrupt(env, PGM_SPECIFICATION, 2);
 156         return;
 157     }
 158     schib = s390_cpu_physical_memory_map(env, addr, &len, 0);
 159     if (!schib || len != sizeof(*schib)) {
 160         program_interrupt(env, PGM_ADDRESSING, 2);
 161         goto out;
 162     }
 163     if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid) ||
 164         !ioinst_schib_valid(schib)) {
 165         program_interrupt(env, PGM_OPERAND, 2);
 166         goto out;
 167     }
 168     trace_ioinst_sch_id("msch", cssid, ssid, schid);
 169     sch = css_find_subch(m, cssid, ssid, schid);
 170     if (sch && css_subch_visible(sch)) {
 171         ret = css_do_msch(sch, schib);
 172     }
 173     switch (ret) {
 174     case -ENODEV:
 175         cc = 3;
 176         break;
 177     case -EBUSY:
 178         cc = 2;
 179         break;
 180     case 0:
 181         cc = 0;
 182         break;
 183     default:
 184         cc = 1;
 185         break;
 186     }
 187     setcc(cpu, cc);
 188
 189 out:
 190     s390_cpu_physical_memory_unmap(env, schib, len, 0);
 191 }
 192
 193 static void copy_orb_from_guest(ORB *dest, const ORB *src)
 194 {
 195     dest->intparm = be32_to_cpu(src->intparm);
 196     dest->ctrl0 = be16_to_cpu(src->ctrl0);
 197     dest->lpm = src->lpm;
 198     dest->ctrl1 = src->ctrl1;
 199     dest->cpa = be32_to_cpu(src->cpa);
 200 }
 201
 202 static int ioinst_orb_valid(ORB *orb)
 203 {
 204     if ((orb->ctrl0 & ORB_CTRL0_MASK_INVALID) ||
 205         (orb->ctrl1 & ORB_CTRL1_MASK_INVALID)) {
 206         return 0;
 207     }
 208     if ((orb->cpa & HIGH_ORDER_BIT) != 0) {
 209         return 0;
 210     }
 211     return 1;
 212 }
 213
 214 void ioinst_handle_ssch(S390CPU *cpu, uint64_t reg1, uint32_t ipb)
 215 {
 216     int cssid, ssid, schid, m;
 217     SubchDev *sch;
 218     ORB *orig_orb, orb;
 219     uint64_t addr;
 220     int ret = -ENODEV;
 221     int cc;
 222     hwaddr len = sizeof(*orig_orb);
 223     CPUS390XState *env = &cpu->env;
 224
 225     addr = decode_basedisp_s(env, ipb);
 226     if (addr & 3) {
 227         program_interrupt(env, PGM_SPECIFICATION, 2);
 228         return;
 229     }
 230     orig_orb = s390_cpu_physical_memory_map(env, addr, &len, 0);
 231     if (!orig_orb || len != sizeof(*orig_orb)) {
 232         program_interrupt(env, PGM_ADDRESSING, 2);
 233         goto out;
 234     }
 235     copy_orb_from_guest(&orb, orig_orb);
 236     if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid) ||
 237         !ioinst_orb_valid(&orb)) {
 238         program_interrupt(env, PGM_OPERAND, 2);
 239         goto out;
 240     }
 241     trace_ioinst_sch_id("ssch", cssid, ssid, schid);
 242     sch = css_find_subch(m, cssid, ssid, schid);
 243     if (sch && css_subch_visible(sch)) {
 244         ret = css_do_ssch(sch, &orb);
 245     }
 246     switch (ret) {
 247     case -ENODEV:
 248         cc = 3;
 249         break;
 250     case -EBUSY:
 251         cc = 2;
 252         break;
 253     case 0:
 254         cc = 0;
 255         break;
 256     default:
 257         cc = 1;
 258         break;
 259     }
 260     setcc(cpu, cc);
 261
 262 out:
 263     s390_cpu_physical_memory_unmap(env, orig_orb, len, 0);
 264 }
 265
 266 void ioinst_handle_stcrw(S390CPU *cpu, uint32_t ipb)
 267 {
 268     CRW *crw;
 269     uint64_t addr;
 270     int cc;
 271     hwaddr len = sizeof(*crw);
 272     CPUS390XState *env = &cpu->env;
 273
 274     addr = decode_basedisp_s(env, ipb);
 275     if (addr & 3) {
 276         program_interrupt(env, PGM_SPECIFICATION, 2);
 277         return;
 278     }
 279     crw = s390_cpu_physical_memory_map(env, addr, &len, 1);
 280     if (!crw || len != sizeof(*crw)) {
 281         program_interrupt(env, PGM_ADDRESSING, 2);
 282         goto out;
 283     }
 284     cc = css_do_stcrw(crw);
 285     /* 0 - crw stored, 1 - zeroes stored */
 286     setcc(cpu, cc);
 287
 288 out:
 289     s390_cpu_physical_memory_unmap(env, crw, len, 1);
 290 }
 291
 292 void ioinst_handle_stsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb)
 293 {
 294     int cssid, ssid, schid, m;
 295     SubchDev *sch;
 296     uint64_t addr;
 297     int cc;
 298     SCHIB *schib;
 299     hwaddr len = sizeof(*schib);
 300     CPUS390XState *env = &cpu->env;
 301
 302     addr = decode_basedisp_s(env, ipb);
 303     if (addr & 3) {
 304         program_interrupt(env, PGM_SPECIFICATION, 2);
 305         return;
 306     }
 307     schib = s390_cpu_physical_memory_map(env, addr, &len, 1);
 308     if (!schib || len != sizeof(*schib)) {
 309         program_interrupt(env, PGM_ADDRESSING, 2);
 310         goto out;
 311     }
 312
 313     if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
 314         program_interrupt(env, PGM_OPERAND, 2);
 315         goto out;
 316     }
 317     trace_ioinst_sch_id("stsch", cssid, ssid, schid);
 318     sch = css_find_subch(m, cssid, ssid, schid);
 319     if (sch) {
 320         if (css_subch_visible(sch)) {
 321             css_do_stsch(sch, schib);
 322             cc = 0;
 323         } else {
 324             /* Indicate no more subchannels in this css/ss */
 325             cc = 3;
 326         }
 327     } else {
 328         if (css_schid_final(m, cssid, ssid, schid)) {
 329             cc = 3; /* No more subchannels in this css/ss */
 330         } else {
 331             /* Store an empty schib. */
 332             memset(schib, 0, sizeof(*schib));
 333             cc = 0;
 334         }
 335     }
 336     setcc(cpu, cc);
 337
 338 out:
 339     s390_cpu_physical_memory_unmap(env, schib, len, 1);
 340 }
 341
 342 int ioinst_handle_tsch(CPUS390XState *env, uint64_t reg1, uint32_t ipb)
 343 {
 344     int cssid, ssid, schid, m;
 345     SubchDev *sch;
 346     IRB *irb;
 347     uint64_t addr;
 348     int ret = -ENODEV;
 349     int cc;
 350     hwaddr len = sizeof(*irb);
 351
 352     if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
 353         program_interrupt(env, PGM_OPERAND, 2);
 354         return -EIO;
 355     }
 356     trace_ioinst_sch_id("tsch", cssid, ssid, schid);
 357     addr = decode_basedisp_s(env, ipb);
 358     if (addr & 3) {
 359         program_interrupt(env, PGM_SPECIFICATION, 2);
 360         return -EIO;
 361     }
 362     irb = s390_cpu_physical_memory_map(env, addr, &len, 1);
 363     if (!irb || len != sizeof(*irb)) {
 364         program_interrupt(env, PGM_ADDRESSING, 2);
 365         cc = -EIO;
 366         goto out;
 367     }
 368     sch = css_find_subch(m, cssid, ssid, schid);
 369     if (sch && css_subch_visible(sch)) {
 370         ret = css_do_tsch(sch, irb);
 371         /* 0 - status pending, 1 - not status pending */
 372         cc = ret;
 373     } else {
 374         cc = 3;
 375     }
 376 out:
 377     s390_cpu_physical_memory_unmap(env, irb, sizeof(*irb), 1);
 378     return cc;
 379 }
 380
 381 typedef struct ChscReq {
 382     uint16_t len;
 383     uint16_t command;
 384     uint32_t param0;
 385     uint32_t param1;
 386     uint32_t param2;
 387 } QEMU_PACKED ChscReq;
 388
 389 typedef struct ChscResp {
 390     uint16_t len;
 391     uint16_t code;
 392     uint32_t param;
 393     char data[0];
 394 } QEMU_PACKED ChscResp;
 395
 396 #define CHSC_MIN_RESP_LEN 0x0008
 397
 398 #define CHSC_SCPD 0x0002
 399 #define CHSC_SCSC 0x0010
 400 #define CHSC_SDA  0x0031
 401
 402 #define CHSC_SCPD_0_M 0x20000000
 403 #define CHSC_SCPD_0_C 0x10000000
 404 #define CHSC_SCPD_0_FMT 0x0f000000
 405 #define CHSC_SCPD_0_CSSID 0x00ff0000
 406 #define CHSC_SCPD_0_RFMT 0x00000f00
 407 #define CHSC_SCPD_0_RES 0xc000f000
 408 #define CHSC_SCPD_1_RES 0xffffff00
 409 #define CHSC_SCPD_01_CHPID 0x000000ff
 410 static void ioinst_handle_chsc_scpd(ChscReq *req, ChscResp *res)
 411 {
 412     uint16_t len = be16_to_cpu(req->len);
 413     uint32_t param0 = be32_to_cpu(req->param0);
 414     uint32_t param1 = be32_to_cpu(req->param1);
 415     uint16_t resp_code;
 416     int rfmt;
 417     uint16_t cssid;
 418     uint8_t f_chpid, l_chpid;
 419     int desc_size;
 420     int m;
 421
 422     rfmt = (param0 & CHSC_SCPD_0_RFMT) >> 8;
 423     if ((rfmt == 0) ||  (rfmt == 1)) {
 424         rfmt = !!(param0 & CHSC_SCPD_0_C);
 425     }
 426     if ((len != 0x0010) || (param0 & CHSC_SCPD_0_RES) ||
 427         (param1 & CHSC_SCPD_1_RES) || req->param2) {
 428         resp_code = 0x0003;
 429         goto out_err;
 430     }
 431     if (param0 & CHSC_SCPD_0_FMT) {
 432         resp_code = 0x0007;
 433         goto out_err;
 434     }
 435     cssid = (param0 & CHSC_SCPD_0_CSSID) >> 16;
 436     m = param0 & CHSC_SCPD_0_M;
 437     if (cssid != 0) {
 438         if (!m || !css_present(cssid)) {
 439             resp_code = 0x0008;
 440             goto out_err;
 441         }
 442     }
 443     f_chpid = param0 & CHSC_SCPD_01_CHPID;
 444     l_chpid = param1 & CHSC_SCPD_01_CHPID;
 445     if (l_chpid < f_chpid) {
 446         resp_code = 0x0003;
 447         goto out_err;
 448     }
 449     /* css_collect_chp_desc() is endian-aware */
 450     desc_size = css_collect_chp_desc(m, cssid, f_chpid, l_chpid, rfmt,
 451                                      &res->data);
 452     res->code = cpu_to_be16(0x0001);
 453     res->len = cpu_to_be16(8 + desc_size);
 454     res->param = cpu_to_be32(rfmt);
 455     return;
 456
 457   out_err:
 458     res->code = cpu_to_be16(resp_code);
 459     res->len = cpu_to_be16(CHSC_MIN_RESP_LEN);
 460     res->param = cpu_to_be32(rfmt);
 461 }
 462
 463 #define CHSC_SCSC_0_M 0x20000000
 464 #define CHSC_SCSC_0_FMT 0x000f0000
 465 #define CHSC_SCSC_0_CSSID 0x0000ff00
 466 #define CHSC_SCSC_0_RES 0xdff000ff
 467 static void ioinst_handle_chsc_scsc(ChscReq *req, ChscResp *res)
 468 {
 469     uint16_t len = be16_to_cpu(req->len);
 470     uint32_t param0 = be32_to_cpu(req->param0);
 471     uint8_t cssid;
 472     uint16_t resp_code;
 473     uint32_t general_chars[510];
 474     uint32_t chsc_chars[508];
 475
 476     if (len != 0x0010) {
 477         resp_code = 0x0003;
 478         goto out_err;
 479     }
 480
 481     if (param0 & CHSC_SCSC_0_FMT) {
 482         resp_code = 0x0007;
 483         goto out_err;
 484     }
 485     cssid = (param0 & CHSC_SCSC_0_CSSID) >> 8;
 486     if (cssid != 0) {
 487         if (!(param0 & CHSC_SCSC_0_M) || !css_present(cssid)) {
 488             resp_code = 0x0008;
 489             goto out_err;
 490         }
 491     }
 492     if ((param0 & CHSC_SCSC_0_RES) || req->param1 || req->param2) {
 493         resp_code = 0x0003;
 494         goto out_err;
 495     }
 496     res->code = cpu_to_be16(0x0001);
 497     res->len = cpu_to_be16(4080);
 498     res->param = 0;
 499
 500     memset(general_chars, 0, sizeof(general_chars));
 501     memset(chsc_chars, 0, sizeof(chsc_chars));
 502
 503     general_chars[0] = cpu_to_be32(0x03000000);
 504     general_chars[1] = cpu_to_be32(0x00059000);
 505
 506     chsc_chars[0] = cpu_to_be32(0x40000000);
 507     chsc_chars[3] = cpu_to_be32(0x00040000);
 508
 509     memcpy(res->data, general_chars, sizeof(general_chars));
 510     memcpy(res->data + sizeof(general_chars), chsc_chars, sizeof(chsc_chars));
 511     return;
 512
 513   out_err:
 514     res->code = cpu_to_be16(resp_code);
 515     res->len = cpu_to_be16(CHSC_MIN_RESP_LEN);
 516     res->param = 0;
 517 }
 518
 519 #define CHSC_SDA_0_FMT 0x0f000000
 520 #define CHSC_SDA_0_OC 0x0000ffff
 521 #define CHSC_SDA_0_RES 0xf0ff0000
 522 #define CHSC_SDA_OC_MCSSE 0x0
 523 #define CHSC_SDA_OC_MSS 0x2
 524 static void ioinst_handle_chsc_sda(ChscReq *req, ChscResp *res)
 525 {
 526     uint16_t resp_code = 0x0001;
 527     uint16_t len = be16_to_cpu(req->len);
 528     uint32_t param0 = be32_to_cpu(req->param0);
 529     uint16_t oc;
 530     int ret;
 531
 532     if ((len != 0x0400) || (param0 & CHSC_SDA_0_RES)) {
 533         resp_code = 0x0003;
 534         goto out;
 535     }
 536
 537     if (param0 & CHSC_SDA_0_FMT) {
 538         resp_code = 0x0007;
 539         goto out;
 540     }
 541
 542     oc = param0 & CHSC_SDA_0_OC;
 543     switch (oc) {
 544     case CHSC_SDA_OC_MCSSE:
 545         ret = css_enable_mcsse();
 546         if (ret == -EINVAL) {
 547             resp_code = 0x0101;
 548             goto out;
 549         }
 550         break;
 551     case CHSC_SDA_OC_MSS:
 552         ret = css_enable_mss();
 553         if (ret == -EINVAL) {
 554             resp_code = 0x0101;
 555             goto out;
 556         }
 557         break;
 558     default:
 559         resp_code = 0x0003;
 560         goto out;
 561     }
 562
 563 out:
 564     res->code = cpu_to_be16(resp_code);
 565     res->len = cpu_to_be16(CHSC_MIN_RESP_LEN);
 566     res->param = 0;
 567 }
 568
 569 static void ioinst_handle_chsc_unimplemented(ChscResp *res)
 570 {
 571     res->len = cpu_to_be16(CHSC_MIN_RESP_LEN);
 572     res->code = cpu_to_be16(0x0004);
 573     res->param = 0;
 574 }
 575
 576 void ioinst_handle_chsc(S390CPU *cpu, uint32_t ipb)
 577 {
 578     ChscReq *req;
 579     ChscResp *res;
 580     uint64_t addr;
 581     int reg;
 582     uint16_t len;
 583     uint16_t command;
 584     hwaddr map_size = TARGET_PAGE_SIZE;
 585     CPUS390XState *env = &cpu->env;
 586
 587     trace_ioinst("chsc");
 588     reg = (ipb >> 20) & 0x00f;
 589     addr = env->regs[reg];
 590     /* Page boundary? */
 591     if (addr & 0xfff) {
 592         program_interrupt(env, PGM_SPECIFICATION, 2);
 593         return;
 594     }
 595     req = s390_cpu_physical_memory_map(env, addr, &map_size, 1);
 596     if (!req || map_size != TARGET_PAGE_SIZE) {
 597         program_interrupt(env, PGM_ADDRESSING, 2);
 598         goto out;
 599     }
 600     len = be16_to_cpu(req->len);
 601     /* Length field valid? */
 602     if ((len < 16) || (len > 4088) || (len & 7)) {
 603         program_interrupt(env, PGM_OPERAND, 2);
 604         goto out;
 605     }
 606     memset((char *)req + len, 0, TARGET_PAGE_SIZE - len);
 607     res = (void *)((char *)req + len);
 608     command = be16_to_cpu(req->command);
 609     trace_ioinst_chsc_cmd(command, len);
 610     switch (command) {
 611     case CHSC_SCSC:
 612         ioinst_handle_chsc_scsc(req, res);
 613         break;
 614     case CHSC_SCPD:
 615         ioinst_handle_chsc_scpd(req, res);
 616         break;
 617     case CHSC_SDA:
 618         ioinst_handle_chsc_sda(req, res);
 619         break;
 620     default:
 621         ioinst_handle_chsc_unimplemented(res);
 622         break;
 623     }
 624
 625     setcc(cpu, 0);    /* Command execution complete */
 626 out:
 627     s390_cpu_physical_memory_unmap(env, req, map_size, 1);
 628 }
 629
 630 int ioinst_handle_tpi(CPUS390XState *env, uint32_t ipb)
 631 {
 632     uint64_t addr;
 633     int lowcore;
 634     IOIntCode *int_code;
 635     hwaddr len, orig_len;
 636     int ret;
 637
 638     trace_ioinst("tpi");
 639     addr = decode_basedisp_s(env, ipb);
 640     if (addr & 3) {
 641         program_interrupt(env, PGM_SPECIFICATION, 2);
 642         return -EIO;
 643     }
 644
 645     lowcore = addr ? 0 : 1;
 646     len = lowcore ? 8 /* two words */ : 12 /* three words */;
 647     orig_len = len;
 648     int_code = s390_cpu_physical_memory_map(env, addr, &len, 1);
 649     if (!int_code || (len != orig_len)) {
 650         program_interrupt(env, PGM_ADDRESSING, 2);
 651         ret = -EIO;
 652         goto out;
 653     }
 654     ret = css_do_tpi(int_code, lowcore);
 655 out:
 656     s390_cpu_physical_memory_unmap(env, int_code, len, 1);
 657     return ret;
 658 }
 659
 660 #define SCHM_REG1_RES(_reg) (_reg & 0x000000000ffffffc)
 661 #define SCHM_REG1_MBK(_reg) ((_reg & 0x00000000f0000000) >> 28)
 662 #define SCHM_REG1_UPD(_reg) ((_reg & 0x0000000000000002) >> 1)
 663 #define SCHM_REG1_DCT(_reg) (_reg & 0x0000000000000001)
 664
 665 void ioinst_handle_schm(S390CPU *cpu, uint64_t reg1, uint64_t reg2,
 666                         uint32_t ipb)
 667 {
 668     uint8_t mbk;
 669     int update;
 670     int dct;
 671     CPUS390XState *env = &cpu->env;
 672
 673     trace_ioinst("schm");
 674
 675     if (SCHM_REG1_RES(reg1)) {
 676         program_interrupt(env, PGM_OPERAND, 2);
 677         return;
 678     }
 679
 680     mbk = SCHM_REG1_MBK(reg1);
 681     update = SCHM_REG1_UPD(reg1);
 682     dct = SCHM_REG1_DCT(reg1);
 683
 684     if (update && (reg2 & 0x000000000000001f)) {
 685         program_interrupt(env, PGM_OPERAND, 2);
 686         return;
 687     }
 688
 689     css_do_schm(mbk, update, dct, update ? reg2 : 0);
 690 }
 691
 692 void ioinst_handle_rsch(S390CPU *cpu, uint64_t reg1)
 693 {
 694     int cssid, ssid, schid, m;
 695     SubchDev *sch;
 696     int ret = -ENODEV;
 697     int cc;
 698
 699     if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
 700         program_interrupt(&cpu->env, PGM_OPERAND, 2);
 701         return;
 702     }
 703     trace_ioinst_sch_id("rsch", cssid, ssid, schid);
 704     sch = css_find_subch(m, cssid, ssid, schid);
 705     if (sch && css_subch_visible(sch)) {
 706         ret = css_do_rsch(sch);
 707     }
 708     switch (ret) {
 709     case -ENODEV:
 710         cc = 3;
 711         break;
 712     case -EINVAL:
 713         cc = 2;
 714         break;
 715     case 0:
 716         cc = 0;
 717         break;
 718     default:
 719         cc = 1;
 720         break;
 721     }
 722     setcc(cpu, cc);
 723 }
 724
 725 #define RCHP_REG1_RES(_reg) (_reg & 0x00000000ff00ff00)
 726 #define RCHP_REG1_CSSID(_reg) ((_reg & 0x0000000000ff0000) >> 16)
 727 #define RCHP_REG1_CHPID(_reg) (_reg & 0x00000000000000ff)
 728 void ioinst_handle_rchp(S390CPU *cpu, uint64_t reg1)
 729 {
 730     int cc;
 731     uint8_t cssid;
 732     uint8_t chpid;
 733     int ret;
 734     CPUS390XState *env = &cpu->env;
 735
 736     if (RCHP_REG1_RES(reg1)) {
 737         program_interrupt(env, PGM_OPERAND, 2);
 738         return;
 739     }
 740
 741     cssid = RCHP_REG1_CSSID(reg1);
 742     chpid = RCHP_REG1_CHPID(reg1);
 743
 744     trace_ioinst_chp_id("rchp", cssid, chpid);
 745
 746     ret = css_do_rchp(cssid, chpid);
 747
 748     switch (ret) {
 749     case -ENODEV:
 750         cc = 3;
 751         break;
 752     case -EBUSY:
 753         cc = 2;
 754         break;
 755     case 0:
 756         cc = 0;
 757         break;
 758     default:
 759         /* Invalid channel subsystem. */
 760         program_interrupt(env, PGM_OPERAND, 2);
 761         return;
 762     }
 763     setcc(cpu, cc);
 764 }
 765
 766 #define SAL_REG1_INVALID(_reg) (_reg & 0x0000000080000000)
 767 void ioinst_handle_sal(S390CPU *cpu, uint64_t reg1)
 768 {
 769     /* We do not provide address limit checking, so let's suppress it. */
 770     if (SAL_REG1_INVALID(reg1) || reg1 & 0x000000000000ffff) {
 771         program_interrupt(&cpu->env, PGM_OPERAND, 2);
 772     }
 773 }