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 "qemu-common.h"
  16 #include "qapi/error.h"
  17 #include "sysemu/reset.h"
  18 #include "sysemu/runstate.h"
  19 #include "sysemu/sysemu.h"
  20 #include "sysemu/tcg.h"
  21 #include "cpu.h"
  22 #include "elf.h"
  23 #include "hw/loader.h"
  24 #include "hw/qdev-properties.h"
  25 #include "hw/boards.h"
  26 #include "hw/s390x/virtio-ccw.h"
  27 #include "hw/s390x/vfio-ccw.h"
  28 #include "hw/s390x/css.h"
  29 #include "hw/s390x/ebcdic.h"
  30 #include "ipl.h"
  31 #include "qemu/error-report.h"
  32 #include "qemu/config-file.h"
  33 #include "qemu/cutils.h"
  34 #include "qemu/option.h"
  35 #include "exec/exec-all.h"
  36
  37 #define KERN_IMAGE_START                0x010000UL
  38 #define LINUX_MAGIC_ADDR                0x010008UL
  39 #define KERN_PARM_AREA                  0x010480UL
  40 #define INITRD_START                    0x800000UL
  41 #define INITRD_PARM_START               0x010408UL
  42 #define PARMFILE_START                  0x001000UL
  43 #define ZIPL_IMAGE_START                0x009000UL
  44 #define IPL_PSW_MASK                    (PSW_MASK_32 | PSW_MASK_64)
  45
  46 static bool iplb_extended_needed(void *opaque)
  47 {
  48     S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
  49
  50     return ipl->iplbext_migration;
  51 }
  52
  53 static const VMStateDescription vmstate_iplb_extended = {
  54     .name = "ipl/iplb_extended",
  55     .version_id = 0,
  56     .minimum_version_id = 0,
  57     .needed = iplb_extended_needed,
  58     .fields = (VMStateField[]) {
  59         VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
  60         VMSTATE_END_OF_LIST()
  61     }
  62 };
  63
  64 static const VMStateDescription vmstate_iplb = {
  65     .name = "ipl/iplb",
  66     .version_id = 0,
  67     .minimum_version_id = 0,
  68     .fields = (VMStateField[]) {
  69         VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
  70         VMSTATE_UINT16(devno, IplParameterBlock),
  71         VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
  72         VMSTATE_END_OF_LIST()
  73     },
  74     .subsections = (const VMStateDescription*[]) {
  75         &vmstate_iplb_extended,
  76         NULL
  77     }
  78 };
  79
  80 static const VMStateDescription vmstate_ipl = {
  81     .name = "ipl",
  82     .version_id = 0,
  83     .minimum_version_id = 0,
  84     .fields = (VMStateField[]) {
  85         VMSTATE_UINT64(compat_start_addr, S390IPLState),
  86         VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
  87         VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
  88         VMSTATE_BOOL(iplb_valid, S390IPLState),
  89         VMSTATE_UINT8(cssid, S390IPLState),
  90         VMSTATE_UINT8(ssid, S390IPLState),
  91         VMSTATE_UINT16(devno, S390IPLState),
  92         VMSTATE_END_OF_LIST()
  93      }
  94 };
  95
  96 static S390IPLState *get_ipl_device(void)
  97 {
  98     return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
  99 }
 100
 101 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
 102 {
 103     uint64_t dstaddr = *(uint64_t *) opaque;
 104     /*
 105      * Assuming that our s390-ccw.img was linked for starting at address 0,
 106      * we can simply add the destination address for the final location
 107      */
 108     return srcaddr + dstaddr;
 109 }
 110
 111 static void s390_ipl_realize(DeviceState *dev, Error **errp)
 112 {
 113     S390IPLState *ipl = S390_IPL(dev);
 114     uint32_t *ipl_psw;
 115     uint64_t pentry;
 116     char *magic;
 117     int kernel_size;
 118     Error *err = NULL;
 119
 120     int bios_size;
 121     char *bios_filename;
 122
 123     /*
 124      * Always load the bios if it was enforced,
 125      * even if an external kernel has been defined.
 126      */
 127     if (!ipl->kernel || ipl->enforce_bios) {
 128         uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
 129
 130         if (bios_name == NULL) {
 131             bios_name = ipl->firmware;
 132         }
 133
 134         bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 135         if (bios_filename == NULL) {
 136             error_setg(&err, "could not find stage1 bootloader");
 137             goto error;
 138         }
 139
 140         bios_size = load_elf(bios_filename, NULL,
 141                              bios_translate_addr, &fwbase,
 142                              &ipl->bios_start_addr, NULL, NULL, NULL, 1,
 143                              EM_S390, 0, 0);
 144         if (bios_size > 0) {
 145             /* Adjust ELF start address to final location */
 146             ipl->bios_start_addr += fwbase;
 147         } else {
 148             /* Try to load non-ELF file */
 149             bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
 150                                             4096);
 151             ipl->bios_start_addr = ZIPL_IMAGE_START;
 152         }
 153         g_free(bios_filename);
 154
 155         if (bios_size == -1) {
 156             error_setg(&err, "could not load bootloader '%s'", bios_name);
 157             goto error;
 158         }
 159
 160         /* default boot target is the bios */
 161         ipl->start_addr = ipl->bios_start_addr;
 162     }
 163
 164     if (ipl->kernel) {
 165         kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL,
 166                                &pentry, NULL,
 167                                NULL, NULL, 1, EM_S390, 0, 0);
 168         if (kernel_size < 0) {
 169             kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
 170             if (kernel_size < 0) {
 171                 error_setg(&err, "could not load kernel '%s'", ipl->kernel);
 172                 goto error;
 173             }
 174             /* if this is Linux use KERN_IMAGE_START */
 175             magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
 176             if (magic && !memcmp(magic, "S390EP", 6)) {
 177                 pentry = KERN_IMAGE_START;
 178             } else {
 179                 /* if not Linux load the address of the (short) IPL PSW */
 180                 ipl_psw = rom_ptr(4, 4);
 181                 if (ipl_psw) {
 182                     pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR;
 183                 } else {
 184                     error_setg(&err, "Could not get IPL PSW");
 185                     goto error;
 186                 }
 187             }
 188         }
 189         /*
 190          * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
 191          * kernel parameters here as well. Note: For old kernels (up to 3.2)
 192          * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
 193          * loader) and it won't work. For this case we force it to 0x10000, too.
 194          */
 195         if (pentry == KERN_IMAGE_START || pentry == 0x800) {
 196             char *parm_area = rom_ptr(KERN_PARM_AREA, strlen(ipl->cmdline) + 1);
 197             ipl->start_addr = KERN_IMAGE_START;
 198             /* Overwrite parameters in the kernel image, which are "rom" */
 199             if (parm_area) {
 200                 strcpy(parm_area, ipl->cmdline);
 201             }
 202         } else {
 203             ipl->start_addr = pentry;
 204         }
 205
 206         if (ipl->initrd) {
 207             ram_addr_t initrd_offset;
 208             int initrd_size;
 209             uint64_t *romptr;
 210
 211             initrd_offset = INITRD_START;
 212             while (kernel_size + 0x100000 > initrd_offset) {
 213                 initrd_offset += 0x100000;
 214             }
 215             initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
 216                                               ram_size - initrd_offset);
 217             if (initrd_size == -1) {
 218                 error_setg(&err, "could not load initrd '%s'", ipl->initrd);
 219                 goto error;
 220             }
 221
 222             /*
 223              * we have to overwrite values in the kernel image,
 224              * which are "rom"
 225              */
 226             romptr = rom_ptr(INITRD_PARM_START, 16);
 227             if (romptr) {
 228                 stq_p(romptr, initrd_offset);
 229                 stq_p(romptr + 1, initrd_size);
 230             }
 231         }
 232     }
 233     /*
 234      * Don't ever use the migrated values, they could come from a different
 235      * BIOS and therefore don't work. But still migrate the values, so
 236      * QEMUs relying on it don't break.
 237      */
 238     ipl->compat_start_addr = ipl->start_addr;
 239     ipl->compat_bios_start_addr = ipl->bios_start_addr;
 240     /*
 241      * Because this Device is not on any bus in the qbus tree (it is
 242      * not a sysbus device and it's not on some other bus like a PCI
 243      * bus) it will not be automatically reset by the 'reset the
 244      * sysbus' hook registered by vl.c like most devices. So we must
 245      * manually register a reset hook for it.
 246      * TODO: there should be a better way to do this.
 247      */
 248     qemu_register_reset(resettable_cold_reset_fn, dev);
 249 error:
 250     error_propagate(errp, err);
 251 }
 252
 253 static Property s390_ipl_properties[] = {
 254     DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
 255     DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
 256     DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
 257     DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
 258     DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
 259     DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
 260     DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
 261                      true),
 262     DEFINE_PROP_END_OF_LIST(),
 263 };
 264
 265 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
 266 {
 267     QemuOptsList *plist = qemu_find_opts("boot-opts");
 268     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 269     const char *tmp;
 270     unsigned long splash_time = 0;
 271
 272     if (!get_boot_device(0)) {
 273         if (boot_menu) {
 274             error_report("boot menu requires a bootindex to be specified for "
 275                          "the IPL device");
 276         }
 277         return;
 278     }
 279
 280     switch (ipl->iplb.pbt) {
 281     case S390_IPL_TYPE_CCW:
 282         /* In the absence of -boot menu, use zipl parameters */
 283         if (!qemu_opt_get(opts, "menu")) {
 284             ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
 285             return;
 286         }
 287         break;
 288     case S390_IPL_TYPE_QEMU_SCSI:
 289         break;
 290     default:
 291         if (boot_menu) {
 292             error_report("boot menu is not supported for this device type");
 293         }
 294         return;
 295     }
 296
 297     if (!boot_menu) {
 298         return;
 299     }
 300
 301     ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
 302
 303     tmp = qemu_opt_get(opts, "splash-time");
 304
 305     if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
 306         error_report("splash-time is invalid, forcing it to 0");
 307         ipl->qipl.boot_menu_timeout = 0;
 308         return;
 309     }
 310
 311     if (splash_time > 0xffffffff) {
 312         error_report("splash-time is too large, forcing it to max value");
 313         ipl->qipl.boot_menu_timeout = 0xffffffff;
 314         return;
 315     }
 316
 317     ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
 318 }
 319
 320 #define CCW_DEVTYPE_NONE        0x00
 321 #define CCW_DEVTYPE_VIRTIO      0x01
 322 #define CCW_DEVTYPE_VIRTIO_NET  0x02
 323 #define CCW_DEVTYPE_SCSI        0x03
 324 #define CCW_DEVTYPE_VFIO        0x04
 325
 326 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
 327 {
 328     CcwDevice *ccw_dev = NULL;
 329     int tmp_dt = CCW_DEVTYPE_NONE;
 330
 331     if (dev_st) {
 332         VirtIONet *virtio_net_dev = (VirtIONet *)
 333             object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
 334         VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
 335             object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
 336                                 TYPE_VIRTIO_CCW_DEVICE);
 337         VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
 338             object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
 339
 340         if (virtio_ccw_dev) {
 341             ccw_dev = CCW_DEVICE(virtio_ccw_dev);
 342             if (virtio_net_dev) {
 343                 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
 344             } else {
 345                 tmp_dt = CCW_DEVTYPE_VIRTIO;
 346             }
 347         } else if (vfio_ccw_dev) {
 348             ccw_dev = CCW_DEVICE(vfio_ccw_dev);
 349             tmp_dt = CCW_DEVTYPE_VFIO;
 350         } else {
 351             SCSIDevice *sd = (SCSIDevice *)
 352                 object_dynamic_cast(OBJECT(dev_st),
 353                                     TYPE_SCSI_DEVICE);
 354             if (sd) {
 355                 SCSIBus *bus = scsi_bus_from_device(sd);
 356                 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
 357                 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
 358                                                        vdev);
 359
 360                 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
 361                                                            TYPE_CCW_DEVICE);
 362                 tmp_dt = CCW_DEVTYPE_SCSI;
 363             }
 364         }
 365     }
 366     if (devtype) {
 367         *devtype = tmp_dt;
 368     }
 369     return ccw_dev;
 370 }
 371
 372 static bool s390_gen_initial_iplb(S390IPLState *ipl)
 373 {
 374     DeviceState *dev_st;
 375     CcwDevice *ccw_dev = NULL;
 376     SCSIDevice *sd;
 377     int devtype;
 378
 379     dev_st = get_boot_device(0);
 380     if (dev_st) {
 381         ccw_dev = s390_get_ccw_device(dev_st, &devtype);
 382     }
 383
 384     /*
 385      * Currently allow IPL only from CCW devices.
 386      */
 387     if (ccw_dev) {
 388         switch (devtype) {
 389         case CCW_DEVTYPE_SCSI:
 390             sd = SCSI_DEVICE(dev_st);
 391             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
 392             ipl->iplb.blk0_len =
 393                 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
 394             ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
 395             ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
 396             ipl->iplb.scsi.target = cpu_to_be16(sd->id);
 397             ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
 398             ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
 399             ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
 400             break;
 401         case CCW_DEVTYPE_VFIO:
 402             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 403             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 404             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 405             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 406             break;
 407         case CCW_DEVTYPE_VIRTIO_NET:
 408             ipl->netboot = true;
 409             /* Fall through to CCW_DEVTYPE_VIRTIO case */
 410         case CCW_DEVTYPE_VIRTIO:
 411             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 412             ipl->iplb.blk0_len =
 413                 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
 414             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 415             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 416             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 417             break;
 418         }
 419
 420         if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
 421             ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
 422         }
 423
 424         return true;
 425     }
 426
 427     return false;
 428 }
 429
 430 int s390_ipl_set_loadparm(uint8_t *loadparm)
 431 {
 432     MachineState *machine = MACHINE(qdev_get_machine());
 433     char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
 434
 435     if (lp) {
 436         int i;
 437
 438         /* lp is an uppercase string without leading/embedded spaces */
 439         for (i = 0; i < 8 && lp[i]; i++) {
 440             loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
 441         }
 442
 443         if (i < 8) {
 444             memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
 445         }
 446
 447         g_free(lp);
 448         return 0;
 449     }
 450
 451     return -1;
 452 }
 453
 454 static int load_netboot_image(Error **errp)
 455 {
 456     S390IPLState *ipl = get_ipl_device();
 457     char *netboot_filename;
 458     MemoryRegion *sysmem =  get_system_memory();
 459     MemoryRegion *mr = NULL;
 460     void *ram_ptr = NULL;
 461     int img_size = -1;
 462
 463     mr = memory_region_find(sysmem, 0, 1).mr;
 464     if (!mr) {
 465         error_setg(errp, "Failed to find memory region at address 0");
 466         return -1;
 467     }
 468
 469     ram_ptr = memory_region_get_ram_ptr(mr);
 470     if (!ram_ptr) {
 471         error_setg(errp, "No RAM found");
 472         goto unref_mr;
 473     }
 474
 475     netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
 476     if (netboot_filename == NULL) {
 477         error_setg(errp, "Could not find network bootloader '%s'",
 478                    ipl->netboot_fw);
 479         goto unref_mr;
 480     }
 481
 482     img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
 483                             &ipl->start_addr,
 484                             NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL,
 485                             false);
 486
 487     if (img_size < 0) {
 488         img_size = load_image_size(netboot_filename, ram_ptr, ram_size);
 489         ipl->start_addr = KERN_IMAGE_START;
 490     }
 491
 492     if (img_size < 0) {
 493         error_setg(errp, "Failed to load network bootloader");
 494     }
 495
 496     g_free(netboot_filename);
 497
 498 unref_mr:
 499     memory_region_unref(mr);
 500     return img_size;
 501 }
 502
 503 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
 504                                          int virtio_id)
 505 {
 506     uint8_t cssid;
 507     uint8_t ssid;
 508     uint16_t devno;
 509     uint16_t schid;
 510     SubchDev *sch = NULL;
 511
 512     if (iplb->pbt != S390_IPL_TYPE_CCW) {
 513         return false;
 514     }
 515
 516     devno = be16_to_cpu(iplb->ccw.devno);
 517     ssid = iplb->ccw.ssid & 3;
 518
 519     for (schid = 0; schid < MAX_SCHID; schid++) {
 520         for (cssid = 0; cssid < MAX_CSSID; cssid++) {
 521             sch = css_find_subch(1, cssid, ssid, schid);
 522
 523             if (sch && sch->devno == devno) {
 524                 return sch->id.cu_model == virtio_id;
 525             }
 526         }
 527     }
 528     return false;
 529 }
 530
 531 static bool is_virtio_net_device(IplParameterBlock *iplb)
 532 {
 533     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
 534 }
 535
 536 static bool is_virtio_scsi_device(IplParameterBlock *iplb)
 537 {
 538     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
 539 }
 540
 541 static void update_machine_ipl_properties(IplParameterBlock *iplb)
 542 {
 543     Object *machine = qdev_get_machine();
 544     Error *err = NULL;
 545
 546     /* Sync loadparm */
 547     if (iplb->flags & DIAG308_FLAGS_LP_VALID) {
 548         uint8_t *ebcdic_loadparm = iplb->loadparm;
 549         char ascii_loadparm[8];
 550         int i;
 551
 552         for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) {
 553             ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]];
 554         }
 555         ascii_loadparm[i] = 0;
 556         object_property_set_str(machine, ascii_loadparm, "loadparm", &err);
 557     } else {
 558         object_property_set_str(machine, "", "loadparm", &err);
 559     }
 560     if (err) {
 561         warn_report_err(err);
 562     }
 563 }
 564
 565 void s390_ipl_update_diag308(IplParameterBlock *iplb)
 566 {
 567     S390IPLState *ipl = get_ipl_device();
 568
 569     ipl->iplb = *iplb;
 570     ipl->iplb_valid = true;
 571     ipl->netboot = is_virtio_net_device(iplb);
 572     update_machine_ipl_properties(iplb);
 573 }
 574
 575 IplParameterBlock *s390_ipl_get_iplb(void)
 576 {
 577     S390IPLState *ipl = get_ipl_device();
 578
 579     if (!ipl->iplb_valid) {
 580         return NULL;
 581     }
 582     return &ipl->iplb;
 583 }
 584
 585 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
 586 {
 587     S390IPLState *ipl = get_ipl_device();
 588
 589     if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
 590         /* use CPU 0 for full resets */
 591         ipl->reset_cpu_index = 0;
 592     } else {
 593         ipl->reset_cpu_index = cs->cpu_index;
 594     }
 595     ipl->reset_type = reset_type;
 596
 597     if (reset_type == S390_RESET_REIPL &&
 598         ipl->iplb_valid &&
 599         !ipl->netboot &&
 600         ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
 601         is_virtio_scsi_device(&ipl->iplb)) {
 602         CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
 603
 604         if (ccw_dev &&
 605             cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
 606             (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
 607             /*
 608              * this is the original boot device's SCSI
 609              * so restore IPL parameter info from it
 610              */
 611             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 612         }
 613     }
 614     if (reset_type == S390_RESET_MODIFIED_CLEAR ||
 615         reset_type == S390_RESET_LOAD_NORMAL) {
 616         /* ignore -no-reboot, send no event  */
 617         qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
 618     } else {
 619         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 620     }
 621     /* as this is triggered by a CPU, make sure to exit the loop */
 622     if (tcg_enabled()) {
 623         cpu_loop_exit(cs);
 624     }
 625 }
 626
 627 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
 628 {
 629     S390IPLState *ipl = get_ipl_device();
 630
 631     *cs = qemu_get_cpu(ipl->reset_cpu_index);
 632     if (!*cs) {
 633         /* use any CPU */
 634         *cs = first_cpu;
 635     }
 636     *reset_type = ipl->reset_type;
 637 }
 638
 639 void s390_ipl_clear_reset_request(void)
 640 {
 641     S390IPLState *ipl = get_ipl_device();
 642
 643     ipl->reset_type = S390_RESET_EXTERNAL;
 644     /* use CPU 0 for full resets */
 645     ipl->reset_cpu_index = 0;
 646 }
 647
 648 static void s390_ipl_prepare_qipl(S390CPU *cpu)
 649 {
 650     S390IPLState *ipl = get_ipl_device();
 651     uint8_t *addr;
 652     uint64_t len = 4096;
 653
 654     addr = cpu_physical_memory_map(cpu->env.psa, &len, true);
 655     if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
 656         error_report("Cannot set QEMU IPL parameters");
 657         return;
 658     }
 659     memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
 660     cpu_physical_memory_unmap(addr, len, 1, len);
 661 }
 662
 663 void s390_ipl_prepare_cpu(S390CPU *cpu)
 664 {
 665     S390IPLState *ipl = get_ipl_device();
 666     Error *err = NULL;
 667
 668     cpu->env.psw.addr = ipl->start_addr;
 669     cpu->env.psw.mask = IPL_PSW_MASK;
 670
 671     if (!ipl->kernel || ipl->iplb_valid) {
 672         cpu->env.psw.addr = ipl->bios_start_addr;
 673         if (!ipl->iplb_valid) {
 674             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 675         }
 676     }
 677     if (ipl->netboot) {
 678         if (load_netboot_image(&err) < 0) {
 679             error_report_err(err);
 680             exit(1);
 681         }
 682         ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
 683     }
 684     s390_ipl_set_boot_menu(ipl);
 685     s390_ipl_prepare_qipl(cpu);
 686 }
 687
 688 static void s390_ipl_reset(DeviceState *dev)
 689 {
 690     S390IPLState *ipl = S390_IPL(dev);
 691
 692     if (ipl->reset_type != S390_RESET_REIPL) {
 693         ipl->iplb_valid = false;
 694         memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
 695     }
 696 }
 697
 698 static void s390_ipl_class_init(ObjectClass *klass, void *data)
 699 {
 700     DeviceClass *dc = DEVICE_CLASS(klass);
 701
 702     dc->realize = s390_ipl_realize;
 703     device_class_set_props(dc, s390_ipl_properties);
 704     dc->reset = s390_ipl_reset;
 705     dc->vmsd = &vmstate_ipl;
 706     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 707     /* Reason: Loads the ROMs and thus can only be used one time - internally */
 708     dc->user_creatable = false;
 709 }
 710
 711 static const TypeInfo s390_ipl_info = {
 712     .class_init = s390_ipl_class_init,
 713     .parent = TYPE_DEVICE,
 714     .name  = TYPE_S390_IPL,
 715     .instance_size  = sizeof(S390IPLState),
 716 };
 717
 718 static void s390_ipl_register_types(void)
 719 {
 720     type_register_static(&s390_ipl_info);
 721 }
 722
 723 type_init(s390_ipl_register_types)