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/sysemu.h"
  18 #include "sysemu/tcg.h"
  19 #include "cpu.h"
  20 #include "elf.h"
  21 #include "hw/loader.h"
  22 #include "hw/boards.h"
  23 #include "hw/s390x/virtio-ccw.h"
  24 #include "hw/s390x/vfio-ccw.h"
  25 #include "hw/s390x/css.h"
  26 #include "hw/s390x/ebcdic.h"
  27 #include "ipl.h"
  28 #include "qemu/error-report.h"
  29 #include "qemu/config-file.h"
  30 #include "qemu/cutils.h"
  31 #include "qemu/option.h"
  32 #include "exec/exec-all.h"
  33
  34 #define KERN_IMAGE_START                0x010000UL
  35 #define LINUX_MAGIC_ADDR                0x010008UL
  36 #define KERN_PARM_AREA                  0x010480UL
  37 #define INITRD_START                    0x800000UL
  38 #define INITRD_PARM_START               0x010408UL
  39 #define PARMFILE_START                  0x001000UL
  40 #define ZIPL_IMAGE_START                0x009000UL
  41 #define IPL_PSW_MASK                    (PSW_MASK_32 | PSW_MASK_64)
  42
  43 static bool iplb_extended_needed(void *opaque)
  44 {
  45     S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
  46
  47     return ipl->iplbext_migration;
  48 }
  49
  50 static const VMStateDescription vmstate_iplb_extended = {
  51     .name = "ipl/iplb_extended",
  52     .version_id = 0,
  53     .minimum_version_id = 0,
  54     .needed = iplb_extended_needed,
  55     .fields = (VMStateField[]) {
  56         VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
  57         VMSTATE_END_OF_LIST()
  58     }
  59 };
  60
  61 static const VMStateDescription vmstate_iplb = {
  62     .name = "ipl/iplb",
  63     .version_id = 0,
  64     .minimum_version_id = 0,
  65     .fields = (VMStateField[]) {
  66         VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
  67         VMSTATE_UINT16(devno, IplParameterBlock),
  68         VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
  69         VMSTATE_END_OF_LIST()
  70     },
  71     .subsections = (const VMStateDescription*[]) {
  72         &vmstate_iplb_extended,
  73         NULL
  74     }
  75 };
  76
  77 static const VMStateDescription vmstate_ipl = {
  78     .name = "ipl",
  79     .version_id = 0,
  80     .minimum_version_id = 0,
  81     .fields = (VMStateField[]) {
  82         VMSTATE_UINT64(compat_start_addr, S390IPLState),
  83         VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
  84         VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
  85         VMSTATE_BOOL(iplb_valid, S390IPLState),
  86         VMSTATE_UINT8(cssid, S390IPLState),
  87         VMSTATE_UINT8(ssid, S390IPLState),
  88         VMSTATE_UINT16(devno, S390IPLState),
  89         VMSTATE_END_OF_LIST()
  90      }
  91 };
  92
  93 static S390IPLState *get_ipl_device(void)
  94 {
  95     return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
  96 }
  97
  98 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
  99 {
 100     uint64_t dstaddr = *(uint64_t *) opaque;
 101     /*
 102      * Assuming that our s390-ccw.img was linked for starting at address 0,
 103      * we can simply add the destination address for the final location
 104      */
 105     return srcaddr + dstaddr;
 106 }
 107
 108 static void s390_ipl_realize(DeviceState *dev, Error **errp)
 109 {
 110     S390IPLState *ipl = S390_IPL(dev);
 111     uint32_t *ipl_psw;
 112     uint64_t pentry;
 113     char *magic;
 114     int kernel_size;
 115     Error *err = NULL;
 116
 117     int bios_size;
 118     char *bios_filename;
 119
 120     /*
 121      * Always load the bios if it was enforced,
 122      * even if an external kernel has been defined.
 123      */
 124     if (!ipl->kernel || ipl->enforce_bios) {
 125         uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
 126
 127         if (bios_name == NULL) {
 128             bios_name = ipl->firmware;
 129         }
 130
 131         bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 132         if (bios_filename == NULL) {
 133             error_setg(&err, "could not find stage1 bootloader");
 134             goto error;
 135         }
 136
 137         bios_size = load_elf(bios_filename, NULL,
 138                              bios_translate_addr, &fwbase,
 139                              &ipl->bios_start_addr, NULL, NULL, 1,
 140                              EM_S390, 0, 0);
 141         if (bios_size > 0) {
 142             /* Adjust ELF start address to final location */
 143             ipl->bios_start_addr += fwbase;
 144         } else {
 145             /* Try to load non-ELF file */
 146             bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
 147                                             4096);
 148             ipl->bios_start_addr = ZIPL_IMAGE_START;
 149         }
 150         g_free(bios_filename);
 151
 152         if (bios_size == -1) {
 153             error_setg(&err, "could not load bootloader '%s'", bios_name);
 154             goto error;
 155         }
 156
 157         /* default boot target is the bios */
 158         ipl->start_addr = ipl->bios_start_addr;
 159     }
 160
 161     if (ipl->kernel) {
 162         kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL,
 163                                &pentry, NULL,
 164                                NULL, 1, EM_S390, 0, 0);
 165         if (kernel_size < 0) {
 166             kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
 167             if (kernel_size < 0) {
 168                 error_setg(&err, "could not load kernel '%s'", ipl->kernel);
 169                 goto error;
 170             }
 171             /* if this is Linux use KERN_IMAGE_START */
 172             magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
 173             if (magic && !memcmp(magic, "S390EP", 6)) {
 174                 pentry = KERN_IMAGE_START;
 175             } else {
 176                 /* if not Linux load the address of the (short) IPL PSW */
 177                 ipl_psw = rom_ptr(4, 4);
 178                 if (ipl_psw) {
 179                     pentry = be32_to_cpu(*ipl_psw) & 0x7fffffffUL;
 180                 } else {
 181                     error_setg(&err, "Could not get IPL PSW");
 182                     goto error;
 183                 }
 184             }
 185         }
 186         /*
 187          * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
 188          * kernel parameters here as well. Note: For old kernels (up to 3.2)
 189          * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
 190          * loader) and it won't work. For this case we force it to 0x10000, too.
 191          */
 192         if (pentry == KERN_IMAGE_START || pentry == 0x800) {
 193             char *parm_area = rom_ptr(KERN_PARM_AREA, strlen(ipl->cmdline) + 1);
 194             ipl->start_addr = KERN_IMAGE_START;
 195             /* Overwrite parameters in the kernel image, which are "rom" */
 196             if (parm_area) {
 197                 strcpy(parm_area, ipl->cmdline);
 198             }
 199         } else {
 200             ipl->start_addr = pentry;
 201         }
 202
 203         if (ipl->initrd) {
 204             ram_addr_t initrd_offset;
 205             int initrd_size;
 206             uint64_t *romptr;
 207
 208             initrd_offset = INITRD_START;
 209             while (kernel_size + 0x100000 > initrd_offset) {
 210                 initrd_offset += 0x100000;
 211             }
 212             initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
 213                                               ram_size - initrd_offset);
 214             if (initrd_size == -1) {
 215                 error_setg(&err, "could not load initrd '%s'", ipl->initrd);
 216                 goto error;
 217             }
 218
 219             /*
 220              * we have to overwrite values in the kernel image,
 221              * which are "rom"
 222              */
 223             romptr = rom_ptr(INITRD_PARM_START, 16);
 224             if (romptr) {
 225                 stq_p(romptr, initrd_offset);
 226                 stq_p(romptr + 1, initrd_size);
 227             }
 228         }
 229     }
 230     /*
 231      * Don't ever use the migrated values, they could come from a different
 232      * BIOS and therefore don't work. But still migrate the values, so
 233      * QEMUs relying on it don't break.
 234      */
 235     ipl->compat_start_addr = ipl->start_addr;
 236     ipl->compat_bios_start_addr = ipl->bios_start_addr;
 237     qemu_register_reset(qdev_reset_all_fn, dev);
 238 error:
 239     error_propagate(errp, err);
 240 }
 241
 242 static Property s390_ipl_properties[] = {
 243     DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
 244     DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
 245     DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
 246     DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
 247     DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
 248     DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
 249     DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
 250                      true),
 251     DEFINE_PROP_END_OF_LIST(),
 252 };
 253
 254 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
 255 {
 256     QemuOptsList *plist = qemu_find_opts("boot-opts");
 257     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 258     const char *tmp;
 259     unsigned long splash_time = 0;
 260
 261     if (!get_boot_device(0)) {
 262         if (boot_menu) {
 263             error_report("boot menu requires a bootindex to be specified for "
 264                          "the IPL device");
 265         }
 266         return;
 267     }
 268
 269     switch (ipl->iplb.pbt) {
 270     case S390_IPL_TYPE_CCW:
 271         /* In the absence of -boot menu, use zipl parameters */
 272         if (!qemu_opt_get(opts, "menu")) {
 273             ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
 274             return;
 275         }
 276         break;
 277     case S390_IPL_TYPE_QEMU_SCSI:
 278         break;
 279     default:
 280         if (boot_menu) {
 281             error_report("boot menu is not supported for this device type");
 282         }
 283         return;
 284     }
 285
 286     if (!boot_menu) {
 287         return;
 288     }
 289
 290     ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
 291
 292     tmp = qemu_opt_get(opts, "splash-time");
 293
 294     if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
 295         error_report("splash-time is invalid, forcing it to 0");
 296         ipl->qipl.boot_menu_timeout = 0;
 297         return;
 298     }
 299
 300     if (splash_time > 0xffffffff) {
 301         error_report("splash-time is too large, forcing it to max value");
 302         ipl->qipl.boot_menu_timeout = 0xffffffff;
 303         return;
 304     }
 305
 306     ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
 307 }
 308
 309 #define CCW_DEVTYPE_NONE        0x00
 310 #define CCW_DEVTYPE_VIRTIO      0x01
 311 #define CCW_DEVTYPE_VIRTIO_NET  0x02
 312 #define CCW_DEVTYPE_SCSI        0x03
 313 #define CCW_DEVTYPE_VFIO        0x04
 314
 315 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
 316 {
 317     CcwDevice *ccw_dev = NULL;
 318     int tmp_dt = CCW_DEVTYPE_NONE;
 319
 320     if (dev_st) {
 321         VirtIONet *virtio_net_dev = (VirtIONet *)
 322             object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
 323         VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
 324             object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
 325                                 TYPE_VIRTIO_CCW_DEVICE);
 326         VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
 327             object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
 328
 329         if (virtio_ccw_dev) {
 330             ccw_dev = CCW_DEVICE(virtio_ccw_dev);
 331             if (virtio_net_dev) {
 332                 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
 333             } else {
 334                 tmp_dt = CCW_DEVTYPE_VIRTIO;
 335             }
 336         } else if (vfio_ccw_dev) {
 337             ccw_dev = CCW_DEVICE(vfio_ccw_dev);
 338             tmp_dt = CCW_DEVTYPE_VFIO;
 339         } else {
 340             SCSIDevice *sd = (SCSIDevice *)
 341                 object_dynamic_cast(OBJECT(dev_st),
 342                                     TYPE_SCSI_DEVICE);
 343             if (sd) {
 344                 SCSIBus *bus = scsi_bus_from_device(sd);
 345                 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
 346                 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
 347                                                        vdev);
 348
 349                 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
 350                                                            TYPE_CCW_DEVICE);
 351                 tmp_dt = CCW_DEVTYPE_SCSI;
 352             }
 353         }
 354     }
 355     if (devtype) {
 356         *devtype = tmp_dt;
 357     }
 358     return ccw_dev;
 359 }
 360
 361 static bool s390_gen_initial_iplb(S390IPLState *ipl)
 362 {
 363     DeviceState *dev_st;
 364     CcwDevice *ccw_dev = NULL;
 365     SCSIDevice *sd;
 366     int devtype;
 367
 368     dev_st = get_boot_device(0);
 369     if (dev_st) {
 370         ccw_dev = s390_get_ccw_device(dev_st, &devtype);
 371     }
 372
 373     /*
 374      * Currently allow IPL only from CCW devices.
 375      */
 376     if (ccw_dev) {
 377         switch (devtype) {
 378         case CCW_DEVTYPE_SCSI:
 379             sd = SCSI_DEVICE(dev_st);
 380             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
 381             ipl->iplb.blk0_len =
 382                 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
 383             ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
 384             ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
 385             ipl->iplb.scsi.target = cpu_to_be16(sd->id);
 386             ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
 387             ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
 388             ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
 389             break;
 390         case CCW_DEVTYPE_VFIO:
 391             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 392             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 393             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 394             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 395             break;
 396         case CCW_DEVTYPE_VIRTIO_NET:
 397             ipl->netboot = true;
 398             /* Fall through to CCW_DEVTYPE_VIRTIO case */
 399         case CCW_DEVTYPE_VIRTIO:
 400             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 401             ipl->iplb.blk0_len =
 402                 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_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         }
 408
 409         if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
 410             ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
 411         }
 412
 413         return true;
 414     }
 415
 416     return false;
 417 }
 418
 419 int s390_ipl_set_loadparm(uint8_t *loadparm)
 420 {
 421     MachineState *machine = MACHINE(qdev_get_machine());
 422     char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
 423
 424     if (lp) {
 425         int i;
 426
 427         /* lp is an uppercase string without leading/embedded spaces */
 428         for (i = 0; i < 8 && lp[i]; i++) {
 429             loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
 430         }
 431
 432         if (i < 8) {
 433             memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
 434         }
 435
 436         g_free(lp);
 437         return 0;
 438     }
 439
 440     return -1;
 441 }
 442
 443 static int load_netboot_image(Error **errp)
 444 {
 445     S390IPLState *ipl = get_ipl_device();
 446     char *netboot_filename;
 447     MemoryRegion *sysmem =  get_system_memory();
 448     MemoryRegion *mr = NULL;
 449     void *ram_ptr = NULL;
 450     int img_size = -1;
 451
 452     mr = memory_region_find(sysmem, 0, 1).mr;
 453     if (!mr) {
 454         error_setg(errp, "Failed to find memory region at address 0");
 455         return -1;
 456     }
 457
 458     ram_ptr = memory_region_get_ram_ptr(mr);
 459     if (!ram_ptr) {
 460         error_setg(errp, "No RAM found");
 461         goto unref_mr;
 462     }
 463
 464     netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
 465     if (netboot_filename == NULL) {
 466         error_setg(errp, "Could not find network bootloader '%s'",
 467                    ipl->netboot_fw);
 468         goto unref_mr;
 469     }
 470
 471     img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
 472                             &ipl->start_addr,
 473                             NULL, NULL, 1, EM_S390, 0, 0, NULL, false);
 474
 475     if (img_size < 0) {
 476         img_size = load_image_size(netboot_filename, ram_ptr, ram_size);
 477         ipl->start_addr = KERN_IMAGE_START;
 478     }
 479
 480     if (img_size < 0) {
 481         error_setg(errp, "Failed to load network bootloader");
 482     }
 483
 484     g_free(netboot_filename);
 485
 486 unref_mr:
 487     memory_region_unref(mr);
 488     return img_size;
 489 }
 490
 491 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
 492                                          int virtio_id)
 493 {
 494     uint8_t cssid;
 495     uint8_t ssid;
 496     uint16_t devno;
 497     uint16_t schid;
 498     SubchDev *sch = NULL;
 499
 500     if (iplb->pbt != S390_IPL_TYPE_CCW) {
 501         return false;
 502     }
 503
 504     devno = be16_to_cpu(iplb->ccw.devno);
 505     ssid = iplb->ccw.ssid & 3;
 506
 507     for (schid = 0; schid < MAX_SCHID; schid++) {
 508         for (cssid = 0; cssid < MAX_CSSID; cssid++) {
 509             sch = css_find_subch(1, cssid, ssid, schid);
 510
 511             if (sch && sch->devno == devno) {
 512                 return sch->id.cu_model == virtio_id;
 513             }
 514         }
 515     }
 516     return false;
 517 }
 518
 519 static bool is_virtio_net_device(IplParameterBlock *iplb)
 520 {
 521     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
 522 }
 523
 524 static bool is_virtio_scsi_device(IplParameterBlock *iplb)
 525 {
 526     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
 527 }
 528
 529 void s390_ipl_update_diag308(IplParameterBlock *iplb)
 530 {
 531     S390IPLState *ipl = get_ipl_device();
 532
 533     ipl->iplb = *iplb;
 534     ipl->iplb_valid = true;
 535     ipl->netboot = is_virtio_net_device(iplb);
 536 }
 537
 538 IplParameterBlock *s390_ipl_get_iplb(void)
 539 {
 540     S390IPLState *ipl = get_ipl_device();
 541
 542     if (!ipl->iplb_valid) {
 543         return NULL;
 544     }
 545     return &ipl->iplb;
 546 }
 547
 548 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
 549 {
 550     S390IPLState *ipl = get_ipl_device();
 551
 552     if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
 553         /* use CPU 0 for full resets */
 554         ipl->reset_cpu_index = 0;
 555     } else {
 556         ipl->reset_cpu_index = cs->cpu_index;
 557     }
 558     ipl->reset_type = reset_type;
 559
 560     if (reset_type == S390_RESET_REIPL &&
 561         ipl->iplb_valid &&
 562         !ipl->netboot &&
 563         ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
 564         is_virtio_scsi_device(&ipl->iplb)) {
 565         CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
 566
 567         if (ccw_dev &&
 568             cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
 569             (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
 570             /*
 571              * this is the original boot device's SCSI
 572              * so restore IPL parameter info from it
 573              */
 574             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 575         }
 576     }
 577     if (reset_type == S390_RESET_MODIFIED_CLEAR ||
 578         reset_type == S390_RESET_LOAD_NORMAL) {
 579         /* ignore -no-reboot, send no event  */
 580         qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
 581     } else {
 582         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 583     }
 584     /* as this is triggered by a CPU, make sure to exit the loop */
 585     if (tcg_enabled()) {
 586         cpu_loop_exit(cs);
 587     }
 588 }
 589
 590 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
 591 {
 592     S390IPLState *ipl = get_ipl_device();
 593
 594     *cs = qemu_get_cpu(ipl->reset_cpu_index);
 595     if (!*cs) {
 596         /* use any CPU */
 597         *cs = first_cpu;
 598     }
 599     *reset_type = ipl->reset_type;
 600 }
 601
 602 void s390_ipl_clear_reset_request(void)
 603 {
 604     S390IPLState *ipl = get_ipl_device();
 605
 606     ipl->reset_type = S390_RESET_EXTERNAL;
 607     /* use CPU 0 for full resets */
 608     ipl->reset_cpu_index = 0;
 609 }
 610
 611 static void s390_ipl_prepare_qipl(S390CPU *cpu)
 612 {
 613     S390IPLState *ipl = get_ipl_device();
 614     uint8_t *addr;
 615     uint64_t len = 4096;
 616
 617     addr = cpu_physical_memory_map(cpu->env.psa, &len, 1);
 618     if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
 619         error_report("Cannot set QEMU IPL parameters");
 620         return;
 621     }
 622     memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
 623     cpu_physical_memory_unmap(addr, len, 1, len);
 624 }
 625
 626 void s390_ipl_prepare_cpu(S390CPU *cpu)
 627 {
 628     S390IPLState *ipl = get_ipl_device();
 629     Error *err = NULL;
 630
 631     cpu->env.psw.addr = ipl->start_addr;
 632     cpu->env.psw.mask = IPL_PSW_MASK;
 633
 634     if (!ipl->kernel || ipl->iplb_valid) {
 635         cpu->env.psw.addr = ipl->bios_start_addr;
 636         if (!ipl->iplb_valid) {
 637             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 638         }
 639     }
 640     if (ipl->netboot) {
 641         if (load_netboot_image(&err) < 0) {
 642             error_report_err(err);
 643             exit(1);
 644         }
 645         ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
 646     }
 647     s390_ipl_set_boot_menu(ipl);
 648     s390_ipl_prepare_qipl(cpu);
 649 }
 650
 651 static void s390_ipl_reset(DeviceState *dev)
 652 {
 653     S390IPLState *ipl = S390_IPL(dev);
 654
 655     if (ipl->reset_type != S390_RESET_REIPL) {
 656         ipl->iplb_valid = false;
 657         memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
 658     }
 659 }
 660
 661 static void s390_ipl_class_init(ObjectClass *klass, void *data)
 662 {
 663     DeviceClass *dc = DEVICE_CLASS(klass);
 664
 665     dc->realize = s390_ipl_realize;
 666     dc->props = s390_ipl_properties;
 667     dc->reset = s390_ipl_reset;
 668     dc->vmsd = &vmstate_ipl;
 669     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 670     /* Reason: Loads the ROMs and thus can only be used one time - internally */
 671     dc->user_creatable = false;
 672 }
 673
 674 static const TypeInfo s390_ipl_info = {
 675     .class_init = s390_ipl_class_init,
 676     .parent = TYPE_DEVICE,
 677     .name  = TYPE_S390_IPL,
 678     .instance_size  = sizeof(S390IPLState),
 679 };
 680
 681 static void s390_ipl_register_types(void)
 682 {
 683     type_register_static(&s390_ipl_info);
 684 }
 685
 686 type_init(s390_ipl_register_types)