hw/s390x/ipl.c

   1 /*
   2  * bootloader support
   3  *
   4  * Copyright IBM, Corp. 2012
   5  *
   6  * Authors:
   7  *  Christian Borntraeger <borntraeger@de.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or (at your
  10  * option) any later version.  See the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #include "qemu/osdep.h"
  15 #include "qapi/error.h"
  16 #include "sysemu/sysemu.h"
  17 #include "cpu.h"
  18 #include "elf.h"
  19 #include "hw/loader.h"
  20 #include "hw/boards.h"
  21 #include "hw/s390x/virtio-ccw.h"
  22 #include "hw/s390x/css.h"
  23 #include "hw/s390x/ebcdic.h"
  24 #include "ipl.h"
  25 #include "qemu/error-report.h"
  26 #include "qemu/config-file.h"
  27 #include "qemu/cutils.h"
  28 #include "qemu/option.h"
  29 #include "exec/exec-all.h"
  30
  31 #define KERN_IMAGE_START                0x010000UL
  32 #define LINUX_MAGIC_ADDR                0x010008UL
  33 #define KERN_PARM_AREA                  0x010480UL
  34 #define INITRD_START                    0x800000UL
  35 #define INITRD_PARM_START               0x010408UL
  36 #define INITRD_PARM_SIZE                0x010410UL
  37 #define PARMFILE_START                  0x001000UL
  38 #define ZIPL_IMAGE_START                0x009000UL
  39 #define IPL_PSW_MASK                    (PSW_MASK_32 | PSW_MASK_64)
  40
  41 static bool iplb_extended_needed(void *opaque)
  42 {
  43     S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
  44
  45     return ipl->iplbext_migration;
  46 }
  47
  48 static const VMStateDescription vmstate_iplb_extended = {
  49     .name = "ipl/iplb_extended",
  50     .version_id = 0,
  51     .minimum_version_id = 0,
  52     .needed = iplb_extended_needed,
  53     .fields = (VMStateField[]) {
  54         VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
  55         VMSTATE_END_OF_LIST()
  56     }
  57 };
  58
  59 static const VMStateDescription vmstate_iplb = {
  60     .name = "ipl/iplb",
  61     .version_id = 0,
  62     .minimum_version_id = 0,
  63     .fields = (VMStateField[]) {
  64         VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
  65         VMSTATE_UINT16(devno, IplParameterBlock),
  66         VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
  67         VMSTATE_END_OF_LIST()
  68     },
  69     .subsections = (const VMStateDescription*[]) {
  70         &vmstate_iplb_extended,
  71         NULL
  72     }
  73 };
  74
  75 static const VMStateDescription vmstate_ipl = {
  76     .name = "ipl",
  77     .version_id = 0,
  78     .minimum_version_id = 0,
  79     .fields = (VMStateField[]) {
  80         VMSTATE_UINT64(compat_start_addr, S390IPLState),
  81         VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
  82         VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
  83         VMSTATE_BOOL(iplb_valid, S390IPLState),
  84         VMSTATE_UINT8(cssid, S390IPLState),
  85         VMSTATE_UINT8(ssid, S390IPLState),
  86         VMSTATE_UINT16(devno, S390IPLState),
  87         VMSTATE_END_OF_LIST()
  88      }
  89 };
  90
  91 static S390IPLState *get_ipl_device(void)
  92 {
  93     return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
  94 }
  95
  96 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
  97 {
  98     uint64_t dstaddr = *(uint64_t *) opaque;
  99     /*
 100      * Assuming that our s390-ccw.img was linked for starting at address 0,
 101      * we can simply add the destination address for the final location
 102      */
 103     return srcaddr + dstaddr;
 104 }
 105
 106 static void s390_ipl_realize(DeviceState *dev, Error **errp)
 107 {
 108     S390IPLState *ipl = S390_IPL(dev);
 109     uint32_t *ipl_psw;
 110     uint64_t pentry;
 111     char *magic;
 112     int kernel_size;
 113     Error *err = NULL;
 114
 115     int bios_size;
 116     char *bios_filename;
 117
 118     /*
 119      * Always load the bios if it was enforced,
 120      * even if an external kernel has been defined.
 121      */
 122     if (!ipl->kernel || ipl->enforce_bios) {
 123         uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
 124
 125         if (bios_name == NULL) {
 126             bios_name = ipl->firmware;
 127         }
 128
 129         bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 130         if (bios_filename == NULL) {
 131             error_setg(&err, "could not find stage1 bootloader");
 132             goto error;
 133         }
 134
 135         bios_size = load_elf(bios_filename, bios_translate_addr, &fwbase,
 136                              &ipl->bios_start_addr, NULL, NULL, 1,
 137                              EM_S390, 0, 0);
 138         if (bios_size > 0) {
 139             /* Adjust ELF start address to final location */
 140             ipl->bios_start_addr += fwbase;
 141         } else {
 142             /* Try to load non-ELF file */
 143             bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
 144                                             4096);
 145             ipl->bios_start_addr = ZIPL_IMAGE_START;
 146         }
 147         g_free(bios_filename);
 148
 149         if (bios_size == -1) {
 150             error_setg(&err, "could not load bootloader '%s'", bios_name);
 151             goto error;
 152         }
 153
 154         /* default boot target is the bios */
 155         ipl->start_addr = ipl->bios_start_addr;
 156     }
 157
 158     if (ipl->kernel) {
 159         kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL,
 160                                NULL, 1, EM_S390, 0, 0);
 161         if (kernel_size < 0) {
 162             kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
 163             if (kernel_size < 0) {
 164                 error_setg(&err, "could not load kernel '%s'", ipl->kernel);
 165                 goto error;
 166             }
 167             /* if this is Linux use KERN_IMAGE_START */
 168             magic = rom_ptr(LINUX_MAGIC_ADDR);
 169             if (magic && !memcmp(magic, "S390EP", 6)) {
 170                 pentry = KERN_IMAGE_START;
 171             } else {
 172                 /* if not Linux load the address of the (short) IPL PSW */
 173                 ipl_psw = rom_ptr(4);
 174                 if (ipl_psw) {
 175                     pentry = be32_to_cpu(*ipl_psw) & 0x7fffffffUL;
 176                 } else {
 177                     error_setg(&err, "Could not get IPL PSW");
 178                     goto error;
 179                 }
 180             }
 181         }
 182         /*
 183          * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
 184          * kernel parameters here as well. Note: For old kernels (up to 3.2)
 185          * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
 186          * loader) and it won't work. For this case we force it to 0x10000, too.
 187          */
 188         if (pentry == KERN_IMAGE_START || pentry == 0x800) {
 189             ipl->start_addr = KERN_IMAGE_START;
 190             /* Overwrite parameters in the kernel image, which are "rom" */
 191             strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline);
 192         } else {
 193             ipl->start_addr = pentry;
 194         }
 195
 196         if (ipl->initrd) {
 197             ram_addr_t initrd_offset;
 198             int initrd_size;
 199
 200             initrd_offset = INITRD_START;
 201             while (kernel_size + 0x100000 > initrd_offset) {
 202                 initrd_offset += 0x100000;
 203             }
 204             initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
 205                                               ram_size - initrd_offset);
 206             if (initrd_size == -1) {
 207                 error_setg(&err, "could not load initrd '%s'", ipl->initrd);
 208                 goto error;
 209             }
 210
 211             /*
 212              * we have to overwrite values in the kernel image,
 213              * which are "rom"
 214              */
 215             stq_p(rom_ptr(INITRD_PARM_START), initrd_offset);
 216             stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size);
 217         }
 218     }
 219     /*
 220      * Don't ever use the migrated values, they could come from a different
 221      * BIOS and therefore don't work. But still migrate the values, so
 222      * QEMUs relying on it don't break.
 223      */
 224     ipl->compat_start_addr = ipl->start_addr;
 225     ipl->compat_bios_start_addr = ipl->bios_start_addr;
 226     qemu_register_reset(qdev_reset_all_fn, dev);
 227 error:
 228     error_propagate(errp, err);
 229 }
 230
 231 static Property s390_ipl_properties[] = {
 232     DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
 233     DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
 234     DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
 235     DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
 236     DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
 237     DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
 238     DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
 239                      true),
 240     DEFINE_PROP_END_OF_LIST(),
 241 };
 242
 243 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
 244 {
 245     QemuOptsList *plist = qemu_find_opts("boot-opts");
 246     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 247     uint8_t *flags = &ipl->qipl.qipl_flags;
 248     uint32_t *timeout = &ipl->qipl.boot_menu_timeout;
 249     const char *tmp;
 250     unsigned long splash_time = 0;
 251
 252     if (!get_boot_device(0)) {
 253         if (boot_menu) {
 254             error_report("boot menu requires a bootindex to be specified for "
 255                          "the IPL device");
 256         }
 257         return;
 258     }
 259
 260     switch (ipl->iplb.pbt) {
 261     case S390_IPL_TYPE_CCW:
 262         /* In the absence of -boot menu, use zipl parameters */
 263         if (!qemu_opt_get(opts, "menu")) {
 264             *flags |= QIPL_FLAG_BM_OPTS_ZIPL;
 265             return;
 266         }
 267         break;
 268     case S390_IPL_TYPE_QEMU_SCSI:
 269         break;
 270     default:
 271         if (boot_menu) {
 272             error_report("boot menu is not supported for this device type");
 273         }
 274         return;
 275     }
 276
 277     if (!boot_menu) {
 278         return;
 279     }
 280
 281     *flags |= QIPL_FLAG_BM_OPTS_CMD;
 282
 283     tmp = qemu_opt_get(opts, "splash-time");
 284
 285     if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
 286         error_report("splash-time is invalid, forcing it to 0");
 287         *timeout = 0;
 288         return;
 289     }
 290
 291     if (splash_time > 0xffffffff) {
 292         error_report("splash-time is too large, forcing it to max value");
 293         *timeout = 0xffffffff;
 294         return;
 295     }
 296
 297     *timeout = cpu_to_be32(splash_time);
 298 }
 299
 300 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st)
 301 {
 302     CcwDevice *ccw_dev = NULL;
 303
 304     if (dev_st) {
 305         VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
 306             object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
 307                                 TYPE_VIRTIO_CCW_DEVICE);
 308         if (virtio_ccw_dev) {
 309             ccw_dev = CCW_DEVICE(virtio_ccw_dev);
 310         } else {
 311             SCSIDevice *sd = (SCSIDevice *)
 312                 object_dynamic_cast(OBJECT(dev_st),
 313                                     TYPE_SCSI_DEVICE);
 314             if (sd) {
 315                 SCSIBus *bus = scsi_bus_from_device(sd);
 316                 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
 317                 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
 318                                                        vdev);
 319
 320                 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
 321                                                            TYPE_CCW_DEVICE);
 322             }
 323         }
 324     }
 325     return ccw_dev;
 326 }
 327
 328 static bool s390_gen_initial_iplb(S390IPLState *ipl)
 329 {
 330     DeviceState *dev_st;
 331     CcwDevice *ccw_dev = NULL;
 332
 333     dev_st = get_boot_device(0);
 334     if (dev_st) {
 335         ccw_dev = s390_get_ccw_device(dev_st);
 336     }
 337
 338     /*
 339      * Currently allow IPL only from CCW devices.
 340      */
 341     if (ccw_dev) {
 342         SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
 343                                                             TYPE_SCSI_DEVICE);
 344
 345         if (sd) {
 346             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
 347             ipl->iplb.blk0_len =
 348                 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
 349             ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
 350             ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
 351             ipl->iplb.scsi.target = cpu_to_be16(sd->id);
 352             ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
 353             ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
 354             ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
 355         } else {
 356             VirtIONet *vn = (VirtIONet *) object_dynamic_cast(OBJECT(dev_st),
 357                                                               TYPE_VIRTIO_NET);
 358
 359             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 360             ipl->iplb.blk0_len =
 361                 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
 362             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 363             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 364             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 365
 366             if (vn) {
 367                 ipl->netboot = true;
 368             }
 369         }
 370
 371         if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
 372             ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
 373         }
 374
 375         return true;
 376     }
 377
 378     return false;
 379 }
 380
 381 int s390_ipl_set_loadparm(uint8_t *loadparm)
 382 {
 383     MachineState *machine = MACHINE(qdev_get_machine());
 384     char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
 385
 386     if (lp) {
 387         int i;
 388
 389         /* lp is an uppercase string without leading/embedded spaces */
 390         for (i = 0; i < 8 && lp[i]; i++) {
 391             loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
 392         }
 393
 394         if (i < 8) {
 395             memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
 396         }
 397
 398         g_free(lp);
 399         return 0;
 400     }
 401
 402     return -1;
 403 }
 404
 405 static int load_netboot_image(Error **errp)
 406 {
 407     S390IPLState *ipl = get_ipl_device();
 408     char *netboot_filename;
 409     MemoryRegion *sysmem =  get_system_memory();
 410     MemoryRegion *mr = NULL;
 411     void *ram_ptr = NULL;
 412     int img_size = -1;
 413
 414     mr = memory_region_find(sysmem, 0, 1).mr;
 415     if (!mr) {
 416         error_setg(errp, "Failed to find memory region at address 0");
 417         return -1;
 418     }
 419
 420     ram_ptr = memory_region_get_ram_ptr(mr);
 421     if (!ram_ptr) {
 422         error_setg(errp, "No RAM found");
 423         goto unref_mr;
 424     }
 425
 426     netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
 427     if (netboot_filename == NULL) {
 428         error_setg(errp, "Could not find network bootloader '%s'",
 429                    ipl->netboot_fw);
 430         goto unref_mr;
 431     }
 432
 433     img_size = load_elf_ram(netboot_filename, NULL, NULL, &ipl->start_addr,
 434                             NULL, NULL, 1, EM_S390, 0, 0, NULL, false);
 435
 436     if (img_size < 0) {
 437         img_size = load_image_size(netboot_filename, ram_ptr, ram_size);
 438         ipl->start_addr = KERN_IMAGE_START;
 439     }
 440
 441     if (img_size < 0) {
 442         error_setg(errp, "Failed to load network bootloader");
 443     }
 444
 445     g_free(netboot_filename);
 446
 447 unref_mr:
 448     memory_region_unref(mr);
 449     return img_size;
 450 }
 451
 452 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
 453                                          int virtio_id)
 454 {
 455     uint8_t cssid;
 456     uint8_t ssid;
 457     uint16_t devno;
 458     uint16_t schid;
 459     SubchDev *sch = NULL;
 460
 461     if (iplb->pbt != S390_IPL_TYPE_CCW) {
 462         return false;
 463     }
 464
 465     devno = be16_to_cpu(iplb->ccw.devno);
 466     ssid = iplb->ccw.ssid & 3;
 467
 468     for (schid = 0; schid < MAX_SCHID; schid++) {
 469         for (cssid = 0; cssid < MAX_CSSID; cssid++) {
 470             sch = css_find_subch(1, cssid, ssid, schid);
 471
 472             if (sch && sch->devno == devno) {
 473                 return sch->id.cu_model == virtio_id;
 474             }
 475         }
 476     }
 477     return false;
 478 }
 479
 480 static bool is_virtio_net_device(IplParameterBlock *iplb)
 481 {
 482     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
 483 }
 484
 485 static bool is_virtio_scsi_device(IplParameterBlock *iplb)
 486 {
 487     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
 488 }
 489
 490 void s390_ipl_update_diag308(IplParameterBlock *iplb)
 491 {
 492     S390IPLState *ipl = get_ipl_device();
 493
 494     ipl->iplb = *iplb;
 495     ipl->iplb_valid = true;
 496     ipl->netboot = is_virtio_net_device(iplb);
 497 }
 498
 499 IplParameterBlock *s390_ipl_get_iplb(void)
 500 {
 501     S390IPLState *ipl = get_ipl_device();
 502
 503     if (!ipl->iplb_valid) {
 504         return NULL;
 505     }
 506     return &ipl->iplb;
 507 }
 508
 509 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
 510 {
 511     S390IPLState *ipl = get_ipl_device();
 512
 513     if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
 514         /* use CPU 0 for full resets */
 515         ipl->reset_cpu_index = 0;
 516     } else {
 517         ipl->reset_cpu_index = cs->cpu_index;
 518     }
 519     ipl->reset_type = reset_type;
 520
 521     if (reset_type == S390_RESET_REIPL &&
 522         ipl->iplb_valid &&
 523         !ipl->netboot &&
 524         ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
 525         is_virtio_scsi_device(&ipl->iplb)) {
 526         CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0));
 527
 528         if (ccw_dev &&
 529             cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
 530             (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
 531             /*
 532              * this is the original boot device's SCSI
 533              * so restore IPL parameter info from it
 534              */
 535             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 536         }
 537     }
 538     if (reset_type == S390_RESET_MODIFIED_CLEAR ||
 539         reset_type == S390_RESET_LOAD_NORMAL) {
 540         /* ignore -no-reboot, send no event  */
 541         qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
 542     } else {
 543         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 544     }
 545     /* as this is triggered by a CPU, make sure to exit the loop */
 546     if (tcg_enabled()) {
 547         cpu_loop_exit(cs);
 548     }
 549 }
 550
 551 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
 552 {
 553     S390IPLState *ipl = get_ipl_device();
 554
 555     *cs = qemu_get_cpu(ipl->reset_cpu_index);
 556     if (!*cs) {
 557         /* use any CPU */
 558         *cs = first_cpu;
 559     }
 560     *reset_type = ipl->reset_type;
 561 }
 562
 563 void s390_ipl_clear_reset_request(void)
 564 {
 565     S390IPLState *ipl = get_ipl_device();
 566
 567     ipl->reset_type = S390_RESET_EXTERNAL;
 568     /* use CPU 0 for full resets */
 569     ipl->reset_cpu_index = 0;
 570 }
 571
 572 static void s390_ipl_prepare_qipl(S390CPU *cpu)
 573 {
 574     S390IPLState *ipl = get_ipl_device();
 575     uint8_t *addr;
 576     uint64_t len = 4096;
 577
 578     addr = cpu_physical_memory_map(cpu->env.psa, &len, 1);
 579     if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
 580         error_report("Cannot set QEMU IPL parameters");
 581         return;
 582     }
 583     memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
 584     cpu_physical_memory_unmap(addr, len, 1, len);
 585 }
 586
 587 void s390_ipl_prepare_cpu(S390CPU *cpu)
 588 {
 589     S390IPLState *ipl = get_ipl_device();
 590     Error *err = NULL;
 591
 592     cpu->env.psw.addr = ipl->start_addr;
 593     cpu->env.psw.mask = IPL_PSW_MASK;
 594
 595     if (!ipl->kernel || ipl->iplb_valid) {
 596         cpu->env.psw.addr = ipl->bios_start_addr;
 597         if (!ipl->iplb_valid) {
 598             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 599         }
 600     }
 601     if (ipl->netboot) {
 602         if (load_netboot_image(&err) < 0) {
 603             error_report_err(err);
 604             exit(1);
 605         }
 606         ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
 607     }
 608     s390_ipl_set_boot_menu(ipl);
 609     s390_ipl_prepare_qipl(cpu);
 610 }
 611
 612 static void s390_ipl_reset(DeviceState *dev)
 613 {
 614     S390IPLState *ipl = S390_IPL(dev);
 615
 616     if (ipl->reset_type != S390_RESET_REIPL) {
 617         ipl->iplb_valid = false;
 618         memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
 619     }
 620 }
 621
 622 static void s390_ipl_class_init(ObjectClass *klass, void *data)
 623 {
 624     DeviceClass *dc = DEVICE_CLASS(klass);
 625
 626     dc->realize = s390_ipl_realize;
 627     dc->props = s390_ipl_properties;
 628     dc->reset = s390_ipl_reset;
 629     dc->vmsd = &vmstate_ipl;
 630     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 631     /* Reason: Loads the ROMs and thus can only be used one time - internally */
 632     dc->user_creatable = false;
 633 }
 634
 635 static const TypeInfo s390_ipl_info = {
 636     .class_init = s390_ipl_class_init,
 637     .parent = TYPE_DEVICE,
 638     .name  = TYPE_S390_IPL,
 639     .instance_size  = sizeof(S390IPLState),
 640 };
 641
 642 static void s390_ipl_register_types(void)
 643 {
 644     type_register_static(&s390_ipl_info);
 645 }
 646
 647 type_init(s390_ipl_register_types)