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/vfio-ccw.h"
  23 #include "hw/s390x/css.h"
  24 #include "hw/s390x/ebcdic.h"
  25 #include "ipl.h"
  26 #include "qemu/error-report.h"
  27 #include "qemu/config-file.h"
  28 #include "qemu/cutils.h"
  29 #include "qemu/option.h"
  30 #include "exec/exec-all.h"
  31
  32 #define KERN_IMAGE_START                0x010000UL
  33 #define LINUX_MAGIC_ADDR                0x010008UL
  34 #define KERN_PARM_AREA                  0x010480UL
  35 #define INITRD_START                    0x800000UL
  36 #define INITRD_PARM_START               0x010408UL
  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, NULL,
 136                              bios_translate_addr, &fwbase,
 137                              &ipl->bios_start_addr, NULL, NULL, 1,
 138                              EM_S390, 0, 0);
 139         if (bios_size > 0) {
 140             /* Adjust ELF start address to final location */
 141             ipl->bios_start_addr += fwbase;
 142         } else {
 143             /* Try to load non-ELF file */
 144             bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
 145                                             4096);
 146             ipl->bios_start_addr = ZIPL_IMAGE_START;
 147         }
 148         g_free(bios_filename);
 149
 150         if (bios_size == -1) {
 151             error_setg(&err, "could not load bootloader '%s'", bios_name);
 152             goto error;
 153         }
 154
 155         /* default boot target is the bios */
 156         ipl->start_addr = ipl->bios_start_addr;
 157     }
 158
 159     if (ipl->kernel) {
 160         kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL,
 161                                &pentry, NULL,
 162                                NULL, 1, EM_S390, 0, 0);
 163         if (kernel_size < 0) {
 164             kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
 165             if (kernel_size < 0) {
 166                 error_setg(&err, "could not load kernel '%s'", ipl->kernel);
 167                 goto error;
 168             }
 169             /* if this is Linux use KERN_IMAGE_START */
 170             magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
 171             if (magic && !memcmp(magic, "S390EP", 6)) {
 172                 pentry = KERN_IMAGE_START;
 173             } else {
 174                 /* if not Linux load the address of the (short) IPL PSW */
 175                 ipl_psw = rom_ptr(4, 4);
 176                 if (ipl_psw) {
 177                     pentry = be32_to_cpu(*ipl_psw) & 0x7fffffffUL;
 178                 } else {
 179                     error_setg(&err, "Could not get IPL PSW");
 180                     goto error;
 181                 }
 182             }
 183         }
 184         /*
 185          * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
 186          * kernel parameters here as well. Note: For old kernels (up to 3.2)
 187          * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
 188          * loader) and it won't work. For this case we force it to 0x10000, too.
 189          */
 190         if (pentry == KERN_IMAGE_START || pentry == 0x800) {
 191             char *parm_area = rom_ptr(KERN_PARM_AREA, strlen(ipl->cmdline) + 1);
 192             ipl->start_addr = KERN_IMAGE_START;
 193             /* Overwrite parameters in the kernel image, which are "rom" */
 194             if (parm_area) {
 195                 strcpy(parm_area, ipl->cmdline);
 196             }
 197         } else {
 198             ipl->start_addr = pentry;
 199         }
 200
 201         if (ipl->initrd) {
 202             ram_addr_t initrd_offset;
 203             int initrd_size;
 204             uint64_t *romptr;
 205
 206             initrd_offset = INITRD_START;
 207             while (kernel_size + 0x100000 > initrd_offset) {
 208                 initrd_offset += 0x100000;
 209             }
 210             initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
 211                                               ram_size - initrd_offset);
 212             if (initrd_size == -1) {
 213                 error_setg(&err, "could not load initrd '%s'", ipl->initrd);
 214                 goto error;
 215             }
 216
 217             /*
 218              * we have to overwrite values in the kernel image,
 219              * which are "rom"
 220              */
 221             romptr = rom_ptr(INITRD_PARM_START, 16);
 222             if (romptr) {
 223                 stq_p(romptr, initrd_offset);
 224                 stq_p(romptr + 1, initrd_size);
 225             }
 226         }
 227     }
 228     /*
 229      * Don't ever use the migrated values, they could come from a different
 230      * BIOS and therefore don't work. But still migrate the values, so
 231      * QEMUs relying on it don't break.
 232      */
 233     ipl->compat_start_addr = ipl->start_addr;
 234     ipl->compat_bios_start_addr = ipl->bios_start_addr;
 235     qemu_register_reset(qdev_reset_all_fn, dev);
 236 error:
 237     error_propagate(errp, err);
 238 }
 239
 240 static Property s390_ipl_properties[] = {
 241     DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
 242     DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
 243     DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
 244     DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
 245     DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
 246     DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
 247     DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
 248                      true),
 249     DEFINE_PROP_END_OF_LIST(),
 250 };
 251
 252 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
 253 {
 254     QemuOptsList *plist = qemu_find_opts("boot-opts");
 255     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 256     const char *tmp;
 257     unsigned long splash_time = 0;
 258
 259     if (!get_boot_device(0)) {
 260         if (boot_menu) {
 261             error_report("boot menu requires a bootindex to be specified for "
 262                          "the IPL device");
 263         }
 264         return;
 265     }
 266
 267     switch (ipl->iplb.pbt) {
 268     case S390_IPL_TYPE_CCW:
 269         /* In the absence of -boot menu, use zipl parameters */
 270         if (!qemu_opt_get(opts, "menu")) {
 271             ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
 272             return;
 273         }
 274         break;
 275     case S390_IPL_TYPE_QEMU_SCSI:
 276         break;
 277     default:
 278         if (boot_menu) {
 279             error_report("boot menu is not supported for this device type");
 280         }
 281         return;
 282     }
 283
 284     if (!boot_menu) {
 285         return;
 286     }
 287
 288     ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
 289
 290     tmp = qemu_opt_get(opts, "splash-time");
 291
 292     if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
 293         error_report("splash-time is invalid, forcing it to 0");
 294         ipl->qipl.boot_menu_timeout = 0;
 295         return;
 296     }
 297
 298     if (splash_time > 0xffffffff) {
 299         error_report("splash-time is too large, forcing it to max value");
 300         ipl->qipl.boot_menu_timeout = 0xffffffff;
 301         return;
 302     }
 303
 304     ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
 305 }
 306
 307 #define CCW_DEVTYPE_NONE        0x00
 308 #define CCW_DEVTYPE_VIRTIO      0x01
 309 #define CCW_DEVTYPE_VIRTIO_NET  0x02
 310 #define CCW_DEVTYPE_SCSI        0x03
 311 #define CCW_DEVTYPE_VFIO        0x04
 312
 313 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
 314 {
 315     CcwDevice *ccw_dev = NULL;
 316     int tmp_dt = CCW_DEVTYPE_NONE;
 317
 318     if (dev_st) {
 319         VirtIONet *virtio_net_dev = (VirtIONet *)
 320             object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
 321         VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
 322             object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
 323                                 TYPE_VIRTIO_CCW_DEVICE);
 324         VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
 325             object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
 326
 327         if (virtio_ccw_dev) {
 328             ccw_dev = CCW_DEVICE(virtio_ccw_dev);
 329             if (virtio_net_dev) {
 330                 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
 331             } else {
 332                 tmp_dt = CCW_DEVTYPE_VIRTIO;
 333             }
 334         } else if (vfio_ccw_dev) {
 335             ccw_dev = CCW_DEVICE(vfio_ccw_dev);
 336             tmp_dt = CCW_DEVTYPE_VFIO;
 337         } else {
 338             SCSIDevice *sd = (SCSIDevice *)
 339                 object_dynamic_cast(OBJECT(dev_st),
 340                                     TYPE_SCSI_DEVICE);
 341             if (sd) {
 342                 SCSIBus *bus = scsi_bus_from_device(sd);
 343                 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
 344                 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
 345                                                        vdev);
 346
 347                 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
 348                                                            TYPE_CCW_DEVICE);
 349                 tmp_dt = CCW_DEVTYPE_SCSI;
 350             }
 351         }
 352     }
 353     if (devtype) {
 354         *devtype = tmp_dt;
 355     }
 356     return ccw_dev;
 357 }
 358
 359 static bool s390_gen_initial_iplb(S390IPLState *ipl)
 360 {
 361     DeviceState *dev_st;
 362     CcwDevice *ccw_dev = NULL;
 363     SCSIDevice *sd;
 364     int devtype;
 365
 366     dev_st = get_boot_device(0);
 367     if (dev_st) {
 368         ccw_dev = s390_get_ccw_device(dev_st, &devtype);
 369     }
 370
 371     /*
 372      * Currently allow IPL only from CCW devices.
 373      */
 374     if (ccw_dev) {
 375         switch (devtype) {
 376         case CCW_DEVTYPE_SCSI:
 377             sd = SCSI_DEVICE(dev_st);
 378             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
 379             ipl->iplb.blk0_len =
 380                 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
 381             ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
 382             ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
 383             ipl->iplb.scsi.target = cpu_to_be16(sd->id);
 384             ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
 385             ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
 386             ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
 387             break;
 388         case CCW_DEVTYPE_VFIO:
 389             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 390             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 391             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 392             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 393             break;
 394         case CCW_DEVTYPE_VIRTIO_NET:
 395             ipl->netboot = true;
 396             /* Fall through to CCW_DEVTYPE_VIRTIO case */
 397         case CCW_DEVTYPE_VIRTIO:
 398             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 399             ipl->iplb.blk0_len =
 400                 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
 401             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 402             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 403             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 404             break;
 405         }
 406
 407         if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
 408             ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
 409         }
 410
 411         return true;
 412     }
 413
 414     return false;
 415 }
 416
 417 int s390_ipl_set_loadparm(uint8_t *loadparm)
 418 {
 419     MachineState *machine = MACHINE(qdev_get_machine());
 420     char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
 421
 422     if (lp) {
 423         int i;
 424
 425         /* lp is an uppercase string without leading/embedded spaces */
 426         for (i = 0; i < 8 && lp[i]; i++) {
 427             loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
 428         }
 429
 430         if (i < 8) {
 431             memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
 432         }
 433
 434         g_free(lp);
 435         return 0;
 436     }
 437
 438     return -1;
 439 }
 440
 441 static int load_netboot_image(Error **errp)
 442 {
 443     S390IPLState *ipl = get_ipl_device();
 444     char *netboot_filename;
 445     MemoryRegion *sysmem =  get_system_memory();
 446     MemoryRegion *mr = NULL;
 447     void *ram_ptr = NULL;
 448     int img_size = -1;
 449
 450     mr = memory_region_find(sysmem, 0, 1).mr;
 451     if (!mr) {
 452         error_setg(errp, "Failed to find memory region at address 0");
 453         return -1;
 454     }
 455
 456     ram_ptr = memory_region_get_ram_ptr(mr);
 457     if (!ram_ptr) {
 458         error_setg(errp, "No RAM found");
 459         goto unref_mr;
 460     }
 461
 462     netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
 463     if (netboot_filename == NULL) {
 464         error_setg(errp, "Could not find network bootloader '%s'",
 465                    ipl->netboot_fw);
 466         goto unref_mr;
 467     }
 468
 469     img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
 470                             &ipl->start_addr,
 471                             NULL, NULL, 1, EM_S390, 0, 0, NULL, false);
 472
 473     if (img_size < 0) {
 474         img_size = load_image_size(netboot_filename, ram_ptr, ram_size);
 475         ipl->start_addr = KERN_IMAGE_START;
 476     }
 477
 478     if (img_size < 0) {
 479         error_setg(errp, "Failed to load network bootloader");
 480     }
 481
 482     g_free(netboot_filename);
 483
 484 unref_mr:
 485     memory_region_unref(mr);
 486     return img_size;
 487 }
 488
 489 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
 490                                          int virtio_id)
 491 {
 492     uint8_t cssid;
 493     uint8_t ssid;
 494     uint16_t devno;
 495     uint16_t schid;
 496     SubchDev *sch = NULL;
 497
 498     if (iplb->pbt != S390_IPL_TYPE_CCW) {
 499         return false;
 500     }
 501
 502     devno = be16_to_cpu(iplb->ccw.devno);
 503     ssid = iplb->ccw.ssid & 3;
 504
 505     for (schid = 0; schid < MAX_SCHID; schid++) {
 506         for (cssid = 0; cssid < MAX_CSSID; cssid++) {
 507             sch = css_find_subch(1, cssid, ssid, schid);
 508
 509             if (sch && sch->devno == devno) {
 510                 return sch->id.cu_model == virtio_id;
 511             }
 512         }
 513     }
 514     return false;
 515 }
 516
 517 static bool is_virtio_net_device(IplParameterBlock *iplb)
 518 {
 519     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
 520 }
 521
 522 static bool is_virtio_scsi_device(IplParameterBlock *iplb)
 523 {
 524     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
 525 }
 526
 527 void s390_ipl_update_diag308(IplParameterBlock *iplb)
 528 {
 529     S390IPLState *ipl = get_ipl_device();
 530
 531     ipl->iplb = *iplb;
 532     ipl->iplb_valid = true;
 533     ipl->netboot = is_virtio_net_device(iplb);
 534 }
 535
 536 IplParameterBlock *s390_ipl_get_iplb(void)
 537 {
 538     S390IPLState *ipl = get_ipl_device();
 539
 540     if (!ipl->iplb_valid) {
 541         return NULL;
 542     }
 543     return &ipl->iplb;
 544 }
 545
 546 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
 547 {
 548     S390IPLState *ipl = get_ipl_device();
 549
 550     if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
 551         /* use CPU 0 for full resets */
 552         ipl->reset_cpu_index = 0;
 553     } else {
 554         ipl->reset_cpu_index = cs->cpu_index;
 555     }
 556     ipl->reset_type = reset_type;
 557
 558     if (reset_type == S390_RESET_REIPL &&
 559         ipl->iplb_valid &&
 560         !ipl->netboot &&
 561         ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
 562         is_virtio_scsi_device(&ipl->iplb)) {
 563         CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
 564
 565         if (ccw_dev &&
 566             cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
 567             (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
 568             /*
 569              * this is the original boot device's SCSI
 570              * so restore IPL parameter info from it
 571              */
 572             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 573         }
 574     }
 575     if (reset_type == S390_RESET_MODIFIED_CLEAR ||
 576         reset_type == S390_RESET_LOAD_NORMAL) {
 577         /* ignore -no-reboot, send no event  */
 578         qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
 579     } else {
 580         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 581     }
 582     /* as this is triggered by a CPU, make sure to exit the loop */
 583     if (tcg_enabled()) {
 584         cpu_loop_exit(cs);
 585     }
 586 }
 587
 588 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
 589 {
 590     S390IPLState *ipl = get_ipl_device();
 591
 592     *cs = qemu_get_cpu(ipl->reset_cpu_index);
 593     if (!*cs) {
 594         /* use any CPU */
 595         *cs = first_cpu;
 596     }
 597     *reset_type = ipl->reset_type;
 598 }
 599
 600 void s390_ipl_clear_reset_request(void)
 601 {
 602     S390IPLState *ipl = get_ipl_device();
 603
 604     ipl->reset_type = S390_RESET_EXTERNAL;
 605     /* use CPU 0 for full resets */
 606     ipl->reset_cpu_index = 0;
 607 }
 608
 609 static void s390_ipl_prepare_qipl(S390CPU *cpu)
 610 {
 611     S390IPLState *ipl = get_ipl_device();
 612     uint8_t *addr;
 613     uint64_t len = 4096;
 614
 615     addr = cpu_physical_memory_map(cpu->env.psa, &len, 1);
 616     if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
 617         error_report("Cannot set QEMU IPL parameters");
 618         return;
 619     }
 620     memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
 621     cpu_physical_memory_unmap(addr, len, 1, len);
 622 }
 623
 624 void s390_ipl_prepare_cpu(S390CPU *cpu)
 625 {
 626     S390IPLState *ipl = get_ipl_device();
 627     Error *err = NULL;
 628
 629     cpu->env.psw.addr = ipl->start_addr;
 630     cpu->env.psw.mask = IPL_PSW_MASK;
 631
 632     if (!ipl->kernel || ipl->iplb_valid) {
 633         cpu->env.psw.addr = ipl->bios_start_addr;
 634         if (!ipl->iplb_valid) {
 635             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 636         }
 637     }
 638     if (ipl->netboot) {
 639         if (load_netboot_image(&err) < 0) {
 640             error_report_err(err);
 641             exit(1);
 642         }
 643         ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
 644     }
 645     s390_ipl_set_boot_menu(ipl);
 646     s390_ipl_prepare_qipl(cpu);
 647 }
 648
 649 static void s390_ipl_reset(DeviceState *dev)
 650 {
 651     S390IPLState *ipl = S390_IPL(dev);
 652
 653     if (ipl->reset_type != S390_RESET_REIPL) {
 654         ipl->iplb_valid = false;
 655         memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
 656     }
 657 }
 658
 659 static void s390_ipl_class_init(ObjectClass *klass, void *data)
 660 {
 661     DeviceClass *dc = DEVICE_CLASS(klass);
 662
 663     dc->realize = s390_ipl_realize;
 664     dc->props = s390_ipl_properties;
 665     dc->reset = s390_ipl_reset;
 666     dc->vmsd = &vmstate_ipl;
 667     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 668     /* Reason: Loads the ROMs and thus can only be used one time - internally */
 669     dc->user_creatable = false;
 670 }
 671
 672 static const TypeInfo s390_ipl_info = {
 673     .class_init = s390_ipl_class_init,
 674     .parent = TYPE_DEVICE,
 675     .name  = TYPE_S390_IPL,
 676     .instance_size  = sizeof(S390IPLState),
 677 };
 678
 679 static void s390_ipl_register_types(void)
 680 {
 681     type_register_static(&s390_ipl_info);
 682 }
 683
 684 type_init(s390_ipl_register_types)