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, 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, 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) & 0x7fffffffUL;
 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     qemu_register_reset(qdev_reset_all_fn, dev);
 241 error:
 242     error_propagate(errp, err);
 243 }
 244
 245 static Property s390_ipl_properties[] = {
 246     DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
 247     DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
 248     DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
 249     DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
 250     DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
 251     DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
 252     DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
 253                      true),
 254     DEFINE_PROP_END_OF_LIST(),
 255 };
 256
 257 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
 258 {
 259     QemuOptsList *plist = qemu_find_opts("boot-opts");
 260     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 261     const char *tmp;
 262     unsigned long splash_time = 0;
 263
 264     if (!get_boot_device(0)) {
 265         if (boot_menu) {
 266             error_report("boot menu requires a bootindex to be specified for "
 267                          "the IPL device");
 268         }
 269         return;
 270     }
 271
 272     switch (ipl->iplb.pbt) {
 273     case S390_IPL_TYPE_CCW:
 274         /* In the absence of -boot menu, use zipl parameters */
 275         if (!qemu_opt_get(opts, "menu")) {
 276             ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
 277             return;
 278         }
 279         break;
 280     case S390_IPL_TYPE_QEMU_SCSI:
 281         break;
 282     default:
 283         if (boot_menu) {
 284             error_report("boot menu is not supported for this device type");
 285         }
 286         return;
 287     }
 288
 289     if (!boot_menu) {
 290         return;
 291     }
 292
 293     ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
 294
 295     tmp = qemu_opt_get(opts, "splash-time");
 296
 297     if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
 298         error_report("splash-time is invalid, forcing it to 0");
 299         ipl->qipl.boot_menu_timeout = 0;
 300         return;
 301     }
 302
 303     if (splash_time > 0xffffffff) {
 304         error_report("splash-time is too large, forcing it to max value");
 305         ipl->qipl.boot_menu_timeout = 0xffffffff;
 306         return;
 307     }
 308
 309     ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
 310 }
 311
 312 #define CCW_DEVTYPE_NONE        0x00
 313 #define CCW_DEVTYPE_VIRTIO      0x01
 314 #define CCW_DEVTYPE_VIRTIO_NET  0x02
 315 #define CCW_DEVTYPE_SCSI        0x03
 316 #define CCW_DEVTYPE_VFIO        0x04
 317
 318 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
 319 {
 320     CcwDevice *ccw_dev = NULL;
 321     int tmp_dt = CCW_DEVTYPE_NONE;
 322
 323     if (dev_st) {
 324         VirtIONet *virtio_net_dev = (VirtIONet *)
 325             object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
 326         VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
 327             object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
 328                                 TYPE_VIRTIO_CCW_DEVICE);
 329         VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
 330             object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
 331
 332         if (virtio_ccw_dev) {
 333             ccw_dev = CCW_DEVICE(virtio_ccw_dev);
 334             if (virtio_net_dev) {
 335                 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
 336             } else {
 337                 tmp_dt = CCW_DEVTYPE_VIRTIO;
 338             }
 339         } else if (vfio_ccw_dev) {
 340             ccw_dev = CCW_DEVICE(vfio_ccw_dev);
 341             tmp_dt = CCW_DEVTYPE_VFIO;
 342         } else {
 343             SCSIDevice *sd = (SCSIDevice *)
 344                 object_dynamic_cast(OBJECT(dev_st),
 345                                     TYPE_SCSI_DEVICE);
 346             if (sd) {
 347                 SCSIBus *bus = scsi_bus_from_device(sd);
 348                 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
 349                 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
 350                                                        vdev);
 351
 352                 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
 353                                                            TYPE_CCW_DEVICE);
 354                 tmp_dt = CCW_DEVTYPE_SCSI;
 355             }
 356         }
 357     }
 358     if (devtype) {
 359         *devtype = tmp_dt;
 360     }
 361     return ccw_dev;
 362 }
 363
 364 static bool s390_gen_initial_iplb(S390IPLState *ipl)
 365 {
 366     DeviceState *dev_st;
 367     CcwDevice *ccw_dev = NULL;
 368     SCSIDevice *sd;
 369     int devtype;
 370
 371     dev_st = get_boot_device(0);
 372     if (dev_st) {
 373         ccw_dev = s390_get_ccw_device(dev_st, &devtype);
 374     }
 375
 376     /*
 377      * Currently allow IPL only from CCW devices.
 378      */
 379     if (ccw_dev) {
 380         switch (devtype) {
 381         case CCW_DEVTYPE_SCSI:
 382             sd = SCSI_DEVICE(dev_st);
 383             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
 384             ipl->iplb.blk0_len =
 385                 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
 386             ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
 387             ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
 388             ipl->iplb.scsi.target = cpu_to_be16(sd->id);
 389             ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
 390             ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
 391             ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
 392             break;
 393         case CCW_DEVTYPE_VFIO:
 394             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 395             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 396             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 397             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 398             break;
 399         case CCW_DEVTYPE_VIRTIO_NET:
 400             ipl->netboot = true;
 401             /* Fall through to CCW_DEVTYPE_VIRTIO case */
 402         case CCW_DEVTYPE_VIRTIO:
 403             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 404             ipl->iplb.blk0_len =
 405                 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
 406             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 407             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 408             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 409             break;
 410         }
 411
 412         if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
 413             ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
 414         }
 415
 416         return true;
 417     }
 418
 419     return false;
 420 }
 421
 422 int s390_ipl_set_loadparm(uint8_t *loadparm)
 423 {
 424     MachineState *machine = MACHINE(qdev_get_machine());
 425     char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
 426
 427     if (lp) {
 428         int i;
 429
 430         /* lp is an uppercase string without leading/embedded spaces */
 431         for (i = 0; i < 8 && lp[i]; i++) {
 432             loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
 433         }
 434
 435         if (i < 8) {
 436             memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
 437         }
 438
 439         g_free(lp);
 440         return 0;
 441     }
 442
 443     return -1;
 444 }
 445
 446 static int load_netboot_image(Error **errp)
 447 {
 448     S390IPLState *ipl = get_ipl_device();
 449     char *netboot_filename;
 450     MemoryRegion *sysmem =  get_system_memory();
 451     MemoryRegion *mr = NULL;
 452     void *ram_ptr = NULL;
 453     int img_size = -1;
 454
 455     mr = memory_region_find(sysmem, 0, 1).mr;
 456     if (!mr) {
 457         error_setg(errp, "Failed to find memory region at address 0");
 458         return -1;
 459     }
 460
 461     ram_ptr = memory_region_get_ram_ptr(mr);
 462     if (!ram_ptr) {
 463         error_setg(errp, "No RAM found");
 464         goto unref_mr;
 465     }
 466
 467     netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
 468     if (netboot_filename == NULL) {
 469         error_setg(errp, "Could not find network bootloader '%s'",
 470                    ipl->netboot_fw);
 471         goto unref_mr;
 472     }
 473
 474     img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
 475                             &ipl->start_addr,
 476                             NULL, NULL, 1, EM_S390, 0, 0, NULL, false);
 477
 478     if (img_size < 0) {
 479         img_size = load_image_size(netboot_filename, ram_ptr, ram_size);
 480         ipl->start_addr = KERN_IMAGE_START;
 481     }
 482
 483     if (img_size < 0) {
 484         error_setg(errp, "Failed to load network bootloader");
 485     }
 486
 487     g_free(netboot_filename);
 488
 489 unref_mr:
 490     memory_region_unref(mr);
 491     return img_size;
 492 }
 493
 494 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
 495                                          int virtio_id)
 496 {
 497     uint8_t cssid;
 498     uint8_t ssid;
 499     uint16_t devno;
 500     uint16_t schid;
 501     SubchDev *sch = NULL;
 502
 503     if (iplb->pbt != S390_IPL_TYPE_CCW) {
 504         return false;
 505     }
 506
 507     devno = be16_to_cpu(iplb->ccw.devno);
 508     ssid = iplb->ccw.ssid & 3;
 509
 510     for (schid = 0; schid < MAX_SCHID; schid++) {
 511         for (cssid = 0; cssid < MAX_CSSID; cssid++) {
 512             sch = css_find_subch(1, cssid, ssid, schid);
 513
 514             if (sch && sch->devno == devno) {
 515                 return sch->id.cu_model == virtio_id;
 516             }
 517         }
 518     }
 519     return false;
 520 }
 521
 522 static bool is_virtio_net_device(IplParameterBlock *iplb)
 523 {
 524     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
 525 }
 526
 527 static bool is_virtio_scsi_device(IplParameterBlock *iplb)
 528 {
 529     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
 530 }
 531
 532 void s390_ipl_update_diag308(IplParameterBlock *iplb)
 533 {
 534     S390IPLState *ipl = get_ipl_device();
 535
 536     ipl->iplb = *iplb;
 537     ipl->iplb_valid = true;
 538     ipl->netboot = is_virtio_net_device(iplb);
 539 }
 540
 541 IplParameterBlock *s390_ipl_get_iplb(void)
 542 {
 543     S390IPLState *ipl = get_ipl_device();
 544
 545     if (!ipl->iplb_valid) {
 546         return NULL;
 547     }
 548     return &ipl->iplb;
 549 }
 550
 551 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
 552 {
 553     S390IPLState *ipl = get_ipl_device();
 554
 555     if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
 556         /* use CPU 0 for full resets */
 557         ipl->reset_cpu_index = 0;
 558     } else {
 559         ipl->reset_cpu_index = cs->cpu_index;
 560     }
 561     ipl->reset_type = reset_type;
 562
 563     if (reset_type == S390_RESET_REIPL &&
 564         ipl->iplb_valid &&
 565         !ipl->netboot &&
 566         ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
 567         is_virtio_scsi_device(&ipl->iplb)) {
 568         CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
 569
 570         if (ccw_dev &&
 571             cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
 572             (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
 573             /*
 574              * this is the original boot device's SCSI
 575              * so restore IPL parameter info from it
 576              */
 577             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 578         }
 579     }
 580     if (reset_type == S390_RESET_MODIFIED_CLEAR ||
 581         reset_type == S390_RESET_LOAD_NORMAL) {
 582         /* ignore -no-reboot, send no event  */
 583         qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
 584     } else {
 585         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 586     }
 587     /* as this is triggered by a CPU, make sure to exit the loop */
 588     if (tcg_enabled()) {
 589         cpu_loop_exit(cs);
 590     }
 591 }
 592
 593 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
 594 {
 595     S390IPLState *ipl = get_ipl_device();
 596
 597     *cs = qemu_get_cpu(ipl->reset_cpu_index);
 598     if (!*cs) {
 599         /* use any CPU */
 600         *cs = first_cpu;
 601     }
 602     *reset_type = ipl->reset_type;
 603 }
 604
 605 void s390_ipl_clear_reset_request(void)
 606 {
 607     S390IPLState *ipl = get_ipl_device();
 608
 609     ipl->reset_type = S390_RESET_EXTERNAL;
 610     /* use CPU 0 for full resets */
 611     ipl->reset_cpu_index = 0;
 612 }
 613
 614 static void s390_ipl_prepare_qipl(S390CPU *cpu)
 615 {
 616     S390IPLState *ipl = get_ipl_device();
 617     uint8_t *addr;
 618     uint64_t len = 4096;
 619
 620     addr = cpu_physical_memory_map(cpu->env.psa, &len, 1);
 621     if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
 622         error_report("Cannot set QEMU IPL parameters");
 623         return;
 624     }
 625     memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
 626     cpu_physical_memory_unmap(addr, len, 1, len);
 627 }
 628
 629 void s390_ipl_prepare_cpu(S390CPU *cpu)
 630 {
 631     S390IPLState *ipl = get_ipl_device();
 632     Error *err = NULL;
 633
 634     cpu->env.psw.addr = ipl->start_addr;
 635     cpu->env.psw.mask = IPL_PSW_MASK;
 636
 637     if (!ipl->kernel || ipl->iplb_valid) {
 638         cpu->env.psw.addr = ipl->bios_start_addr;
 639         if (!ipl->iplb_valid) {
 640             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 641         }
 642     }
 643     if (ipl->netboot) {
 644         if (load_netboot_image(&err) < 0) {
 645             error_report_err(err);
 646             exit(1);
 647         }
 648         ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
 649     }
 650     s390_ipl_set_boot_menu(ipl);
 651     s390_ipl_prepare_qipl(cpu);
 652 }
 653
 654 static void s390_ipl_reset(DeviceState *dev)
 655 {
 656     S390IPLState *ipl = S390_IPL(dev);
 657
 658     if (ipl->reset_type != S390_RESET_REIPL) {
 659         ipl->iplb_valid = false;
 660         memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
 661     }
 662 }
 663
 664 static void s390_ipl_class_init(ObjectClass *klass, void *data)
 665 {
 666     DeviceClass *dc = DEVICE_CLASS(klass);
 667
 668     dc->realize = s390_ipl_realize;
 669     dc->props = s390_ipl_properties;
 670     dc->reset = s390_ipl_reset;
 671     dc->vmsd = &vmstate_ipl;
 672     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 673     /* Reason: Loads the ROMs and thus can only be used one time - internally */
 674     dc->user_creatable = false;
 675 }
 676
 677 static const TypeInfo s390_ipl_info = {
 678     .class_init = s390_ipl_class_init,
 679     .parent = TYPE_DEVICE,
 680     .name  = TYPE_S390_IPL,
 681     .instance_size  = sizeof(S390IPLState),
 682 };
 683
 684 static void s390_ipl_register_types(void)
 685 {
 686     type_register_static(&s390_ipl_info);
 687 }
 688
 689 type_init(s390_ipl_register_types)