hw/s390x/ipl.c

   1 /*
   2  * bootloader support
   3  *
   4  * Copyright IBM, Corp. 2012, 2020
   5  *
   6  * Authors:
   7  *  Christian Borntraeger <borntraeger@de.ibm.com>
   8  *  Janosch Frank <frankja@linux.ibm.com>
   9  *
  10  * This work is licensed under the terms of the GNU GPL, version 2 or (at your
  11  * option) any later version.  See the COPYING file in the top-level directory.
  12  *
  13  */
  14
  15 #include "qemu/osdep.h"
  16 #include "qemu/datadir.h"
  17 #include "qapi/error.h"
  18 #include "sysemu/reset.h"
  19 #include "sysemu/runstate.h"
  20 #include "sysemu/tcg.h"
  21 #include "elf.h"
  22 #include "hw/loader.h"
  23 #include "hw/qdev-properties.h"
  24 #include "hw/boards.h"
  25 #include "hw/s390x/virtio-ccw.h"
  26 #include "hw/s390x/vfio-ccw.h"
  27 #include "hw/s390x/css.h"
  28 #include "hw/s390x/ebcdic.h"
  29 #include "hw/s390x/pv.h"
  30 #include "hw/scsi/scsi.h"
  31 #include "hw/virtio/virtio-net.h"
  32 #include "ipl.h"
  33 #include "qemu/error-report.h"
  34 #include "qemu/config-file.h"
  35 #include "qemu/cutils.h"
  36 #include "qemu/option.h"
  37 #include "standard-headers/linux/virtio_ids.h"
  38 #include "exec/exec-all.h"
  39
  40 #define KERN_IMAGE_START                0x010000UL
  41 #define LINUX_MAGIC_ADDR                0x010008UL
  42 #define KERN_PARM_AREA_SIZE_ADDR        0x010430UL
  43 #define KERN_PARM_AREA                  0x010480UL
  44 #define LEGACY_KERN_PARM_AREA_SIZE      0x000380UL
  45 #define INITRD_START                    0x800000UL
  46 #define INITRD_PARM_START               0x010408UL
  47 #define PARMFILE_START                  0x001000UL
  48 #define ZIPL_IMAGE_START                0x009000UL
  49 #define IPL_PSW_MASK                    (PSW_MASK_32 | PSW_MASK_64)
  50
  51 static bool iplb_extended_needed(void *opaque)
  52 {
  53     S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
  54
  55     return ipl->iplbext_migration;
  56 }
  57
  58 static const VMStateDescription vmstate_iplb_extended = {
  59     .name = "ipl/iplb_extended",
  60     .version_id = 0,
  61     .minimum_version_id = 0,
  62     .needed = iplb_extended_needed,
  63     .fields = (VMStateField[]) {
  64         VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
  65         VMSTATE_END_OF_LIST()
  66     }
  67 };
  68
  69 static const VMStateDescription vmstate_iplb = {
  70     .name = "ipl/iplb",
  71     .version_id = 0,
  72     .minimum_version_id = 0,
  73     .fields = (VMStateField[]) {
  74         VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
  75         VMSTATE_UINT16(devno, IplParameterBlock),
  76         VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
  77         VMSTATE_END_OF_LIST()
  78     },
  79     .subsections = (const VMStateDescription*[]) {
  80         &vmstate_iplb_extended,
  81         NULL
  82     }
  83 };
  84
  85 static const VMStateDescription vmstate_ipl = {
  86     .name = "ipl",
  87     .version_id = 0,
  88     .minimum_version_id = 0,
  89     .fields = (VMStateField[]) {
  90         VMSTATE_UINT64(compat_start_addr, S390IPLState),
  91         VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
  92         VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
  93         VMSTATE_BOOL(iplb_valid, S390IPLState),
  94         VMSTATE_UINT8(cssid, S390IPLState),
  95         VMSTATE_UINT8(ssid, S390IPLState),
  96         VMSTATE_UINT16(devno, S390IPLState),
  97         VMSTATE_END_OF_LIST()
  98      }
  99 };
 100
 101 static S390IPLState *get_ipl_device(void)
 102 {
 103     return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
 104 }
 105
 106 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
 107 {
 108     uint64_t dstaddr = *(uint64_t *) opaque;
 109     /*
 110      * Assuming that our s390-ccw.img was linked for starting at address 0,
 111      * we can simply add the destination address for the final location
 112      */
 113     return srcaddr + dstaddr;
 114 }
 115
 116 static uint64_t get_max_kernel_cmdline_size(void)
 117 {
 118     uint64_t *size_ptr = rom_ptr(KERN_PARM_AREA_SIZE_ADDR, sizeof(*size_ptr));
 119
 120     if (size_ptr) {
 121         uint64_t size;
 122
 123         size = be64_to_cpu(*size_ptr);
 124         if (size) {
 125             return size;
 126         }
 127     }
 128     return LEGACY_KERN_PARM_AREA_SIZE;
 129 }
 130
 131 static void s390_ipl_realize(DeviceState *dev, Error **errp)
 132 {
 133     MachineState *ms = MACHINE(qdev_get_machine());
 134     S390IPLState *ipl = S390_IPL(dev);
 135     uint32_t *ipl_psw;
 136     uint64_t pentry;
 137     char *magic;
 138     int kernel_size;
 139
 140     int bios_size;
 141     char *bios_filename;
 142
 143     /*
 144      * Always load the bios if it was enforced,
 145      * even if an external kernel has been defined.
 146      */
 147     if (!ipl->kernel || ipl->enforce_bios) {
 148         uint64_t fwbase = (MIN(ms->ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
 149
 150         bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->firmware);
 151         if (bios_filename == NULL) {
 152             error_setg(errp, "could not find stage1 bootloader");
 153             return;
 154         }
 155
 156         bios_size = load_elf(bios_filename, NULL,
 157                              bios_translate_addr, &fwbase,
 158                              &ipl->bios_start_addr, NULL, NULL, NULL, 1,
 159                              EM_S390, 0, 0);
 160         if (bios_size > 0) {
 161             /* Adjust ELF start address to final location */
 162             ipl->bios_start_addr += fwbase;
 163         } else {
 164             /* Try to load non-ELF file */
 165             bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
 166                                             4096);
 167             ipl->bios_start_addr = ZIPL_IMAGE_START;
 168         }
 169         g_free(bios_filename);
 170
 171         if (bios_size == -1) {
 172             error_setg(errp, "could not load bootloader '%s'", ipl->firmware);
 173             return;
 174         }
 175
 176         /* default boot target is the bios */
 177         ipl->start_addr = ipl->bios_start_addr;
 178     }
 179
 180     if (ipl->kernel) {
 181         kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL,
 182                                &pentry, NULL,
 183                                NULL, NULL, 1, EM_S390, 0, 0);
 184         if (kernel_size < 0) {
 185             kernel_size = load_image_targphys(ipl->kernel, 0, ms->ram_size);
 186             if (kernel_size < 0) {
 187                 error_setg(errp, "could not load kernel '%s'", ipl->kernel);
 188                 return;
 189             }
 190             /* if this is Linux use KERN_IMAGE_START */
 191             magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
 192             if (magic && !memcmp(magic, "S390EP", 6)) {
 193                 pentry = KERN_IMAGE_START;
 194             } else {
 195                 /* if not Linux load the address of the (short) IPL PSW */
 196                 ipl_psw = rom_ptr(4, 4);
 197                 if (ipl_psw) {
 198                     pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR;
 199                 } else {
 200                     error_setg(errp, "Could not get IPL PSW");
 201                     return;
 202                 }
 203             }
 204         }
 205         /*
 206          * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
 207          * kernel parameters here as well. Note: For old kernels (up to 3.2)
 208          * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
 209          * loader) and it won't work. For this case we force it to 0x10000, too.
 210          */
 211         if (pentry == KERN_IMAGE_START || pentry == 0x800) {
 212             size_t cmdline_size = strlen(ipl->cmdline) + 1;
 213             char *parm_area = rom_ptr(KERN_PARM_AREA, cmdline_size);
 214
 215             ipl->start_addr = KERN_IMAGE_START;
 216             /* Overwrite parameters in the kernel image, which are "rom" */
 217             if (parm_area) {
 218                 uint64_t max_cmdline_size = get_max_kernel_cmdline_size();
 219
 220                 if (cmdline_size > max_cmdline_size) {
 221                     error_setg(errp,
 222                                "kernel command line exceeds maximum size:"
 223                                " %zu > %" PRIu64,
 224                                cmdline_size, max_cmdline_size);
 225                     return;
 226                 }
 227
 228                 strcpy(parm_area, ipl->cmdline);
 229             }
 230         } else {
 231             ipl->start_addr = pentry;
 232         }
 233
 234         if (ipl->initrd) {
 235             ram_addr_t initrd_offset;
 236             int initrd_size;
 237             uint64_t *romptr;
 238
 239             initrd_offset = INITRD_START;
 240             while (kernel_size + 0x100000 > initrd_offset) {
 241                 initrd_offset += 0x100000;
 242             }
 243             initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
 244                                               ms->ram_size - initrd_offset);
 245             if (initrd_size == -1) {
 246                 error_setg(errp, "could not load initrd '%s'", ipl->initrd);
 247                 return;
 248             }
 249
 250             /*
 251              * we have to overwrite values in the kernel image,
 252              * which are "rom"
 253              */
 254             romptr = rom_ptr(INITRD_PARM_START, 16);
 255             if (romptr) {
 256                 stq_p(romptr, initrd_offset);
 257                 stq_p(romptr + 1, initrd_size);
 258             }
 259         }
 260     }
 261     /*
 262      * Don't ever use the migrated values, they could come from a different
 263      * BIOS and therefore don't work. But still migrate the values, so
 264      * QEMUs relying on it don't break.
 265      */
 266     ipl->compat_start_addr = ipl->start_addr;
 267     ipl->compat_bios_start_addr = ipl->bios_start_addr;
 268     /*
 269      * Because this Device is not on any bus in the qbus tree (it is
 270      * not a sysbus device and it's not on some other bus like a PCI
 271      * bus) it will not be automatically reset by the 'reset the
 272      * sysbus' hook registered by vl.c like most devices. So we must
 273      * manually register a reset hook for it.
 274      * TODO: there should be a better way to do this.
 275      */
 276     qemu_register_reset(resettable_cold_reset_fn, dev);
 277 }
 278
 279 static Property s390_ipl_properties[] = {
 280     DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
 281     DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
 282     DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
 283     DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
 284     DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
 285     DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
 286     DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
 287                      true),
 288     DEFINE_PROP_END_OF_LIST(),
 289 };
 290
 291 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
 292 {
 293     QemuOptsList *plist = qemu_find_opts("boot-opts");
 294     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 295     const char *tmp;
 296     unsigned long splash_time = 0;
 297
 298     if (!get_boot_device(0)) {
 299         if (boot_menu) {
 300             error_report("boot menu requires a bootindex to be specified for "
 301                          "the IPL device");
 302         }
 303         return;
 304     }
 305
 306     switch (ipl->iplb.pbt) {
 307     case S390_IPL_TYPE_CCW:
 308         /* In the absence of -boot menu, use zipl parameters */
 309         if (!qemu_opt_get(opts, "menu")) {
 310             ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
 311             return;
 312         }
 313         break;
 314     case S390_IPL_TYPE_QEMU_SCSI:
 315         break;
 316     default:
 317         if (boot_menu) {
 318             error_report("boot menu is not supported for this device type");
 319         }
 320         return;
 321     }
 322
 323     if (!boot_menu) {
 324         return;
 325     }
 326
 327     ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
 328
 329     tmp = qemu_opt_get(opts, "splash-time");
 330
 331     if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
 332         error_report("splash-time is invalid, forcing it to 0");
 333         ipl->qipl.boot_menu_timeout = 0;
 334         return;
 335     }
 336
 337     if (splash_time > 0xffffffff) {
 338         error_report("splash-time is too large, forcing it to max value");
 339         ipl->qipl.boot_menu_timeout = 0xffffffff;
 340         return;
 341     }
 342
 343     ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
 344 }
 345
 346 #define CCW_DEVTYPE_NONE        0x00
 347 #define CCW_DEVTYPE_VIRTIO      0x01
 348 #define CCW_DEVTYPE_VIRTIO_NET  0x02
 349 #define CCW_DEVTYPE_SCSI        0x03
 350 #define CCW_DEVTYPE_VFIO        0x04
 351
 352 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
 353 {
 354     CcwDevice *ccw_dev = NULL;
 355     int tmp_dt = CCW_DEVTYPE_NONE;
 356
 357     if (dev_st) {
 358         VirtIONet *virtio_net_dev = (VirtIONet *)
 359             object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
 360         VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
 361             object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
 362                                 TYPE_VIRTIO_CCW_DEVICE);
 363         VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
 364             object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
 365
 366         if (virtio_ccw_dev) {
 367             ccw_dev = CCW_DEVICE(virtio_ccw_dev);
 368             if (virtio_net_dev) {
 369                 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
 370             } else {
 371                 tmp_dt = CCW_DEVTYPE_VIRTIO;
 372             }
 373         } else if (vfio_ccw_dev) {
 374             ccw_dev = CCW_DEVICE(vfio_ccw_dev);
 375             tmp_dt = CCW_DEVTYPE_VFIO;
 376         } else {
 377             SCSIDevice *sd = (SCSIDevice *)
 378                 object_dynamic_cast(OBJECT(dev_st),
 379                                     TYPE_SCSI_DEVICE);
 380             if (sd) {
 381                 SCSIBus *sbus = scsi_bus_from_device(sd);
 382                 VirtIODevice *vdev = (VirtIODevice *)
 383                     object_dynamic_cast(OBJECT(sbus->qbus.parent),
 384                                         TYPE_VIRTIO_DEVICE);
 385                 if (vdev) {
 386                     ccw_dev = (CcwDevice *)
 387                         object_dynamic_cast(OBJECT(qdev_get_parent_bus(DEVICE(vdev))->parent),
 388                                             TYPE_CCW_DEVICE);
 389                     if (ccw_dev) {
 390                         tmp_dt = CCW_DEVTYPE_SCSI;
 391                     }
 392                 }
 393             }
 394         }
 395     }
 396     if (devtype) {
 397         *devtype = tmp_dt;
 398     }
 399     return ccw_dev;
 400 }
 401
 402 static bool s390_gen_initial_iplb(S390IPLState *ipl)
 403 {
 404     DeviceState *dev_st;
 405     CcwDevice *ccw_dev = NULL;
 406     SCSIDevice *sd;
 407     int devtype;
 408
 409     dev_st = get_boot_device(0);
 410     if (dev_st) {
 411         ccw_dev = s390_get_ccw_device(dev_st, &devtype);
 412     }
 413
 414     /*
 415      * Currently allow IPL only from CCW devices.
 416      */
 417     if (ccw_dev) {
 418         switch (devtype) {
 419         case CCW_DEVTYPE_SCSI:
 420             sd = SCSI_DEVICE(dev_st);
 421             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
 422             ipl->iplb.blk0_len =
 423                 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
 424             ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
 425             ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
 426             ipl->iplb.scsi.target = cpu_to_be16(sd->id);
 427             ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
 428             ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
 429             ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
 430             break;
 431         case CCW_DEVTYPE_VFIO:
 432             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 433             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 434             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 435             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 436             break;
 437         case CCW_DEVTYPE_VIRTIO_NET:
 438             ipl->netboot = true;
 439             /* Fall through to CCW_DEVTYPE_VIRTIO case */
 440         case CCW_DEVTYPE_VIRTIO:
 441             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 442             ipl->iplb.blk0_len =
 443                 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
 444             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 445             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 446             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 447             break;
 448         }
 449
 450         if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
 451             ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
 452         }
 453
 454         return true;
 455     }
 456
 457     return false;
 458 }
 459
 460 int s390_ipl_set_loadparm(uint8_t *loadparm)
 461 {
 462     MachineState *machine = MACHINE(qdev_get_machine());
 463     char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
 464
 465     if (lp) {
 466         int i;
 467
 468         /* lp is an uppercase string without leading/embedded spaces */
 469         for (i = 0; i < 8 && lp[i]; i++) {
 470             loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
 471         }
 472
 473         if (i < 8) {
 474             memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
 475         }
 476
 477         g_free(lp);
 478         return 0;
 479     }
 480
 481     return -1;
 482 }
 483
 484 static int load_netboot_image(Error **errp)
 485 {
 486     MachineState *ms = MACHINE(qdev_get_machine());
 487     S390IPLState *ipl = get_ipl_device();
 488     char *netboot_filename;
 489     MemoryRegion *sysmem =  get_system_memory();
 490     MemoryRegion *mr = NULL;
 491     void *ram_ptr = NULL;
 492     int img_size = -1;
 493
 494     mr = memory_region_find(sysmem, 0, 1).mr;
 495     if (!mr) {
 496         error_setg(errp, "Failed to find memory region at address 0");
 497         return -1;
 498     }
 499
 500     ram_ptr = memory_region_get_ram_ptr(mr);
 501     if (!ram_ptr) {
 502         error_setg(errp, "No RAM found");
 503         goto unref_mr;
 504     }
 505
 506     netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
 507     if (netboot_filename == NULL) {
 508         error_setg(errp, "Could not find network bootloader '%s'",
 509                    ipl->netboot_fw);
 510         goto unref_mr;
 511     }
 512
 513     img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
 514                             &ipl->start_addr,
 515                             NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL,
 516                             false);
 517
 518     if (img_size < 0) {
 519         img_size = load_image_size(netboot_filename, ram_ptr, ms->ram_size);
 520         ipl->start_addr = KERN_IMAGE_START;
 521     }
 522
 523     if (img_size < 0) {
 524         error_setg(errp, "Failed to load network bootloader");
 525     }
 526
 527     g_free(netboot_filename);
 528
 529 unref_mr:
 530     memory_region_unref(mr);
 531     return img_size;
 532 }
 533
 534 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
 535                                          int virtio_id)
 536 {
 537     uint8_t cssid;
 538     uint8_t ssid;
 539     uint16_t devno;
 540     uint16_t schid;
 541     SubchDev *sch = NULL;
 542
 543     if (iplb->pbt != S390_IPL_TYPE_CCW) {
 544         return false;
 545     }
 546
 547     devno = be16_to_cpu(iplb->ccw.devno);
 548     ssid = iplb->ccw.ssid & 3;
 549
 550     for (schid = 0; schid < MAX_SCHID; schid++) {
 551         for (cssid = 0; cssid < MAX_CSSID; cssid++) {
 552             sch = css_find_subch(1, cssid, ssid, schid);
 553
 554             if (sch && sch->devno == devno) {
 555                 return sch->id.cu_model == virtio_id;
 556             }
 557         }
 558     }
 559     return false;
 560 }
 561
 562 static bool is_virtio_net_device(IplParameterBlock *iplb)
 563 {
 564     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
 565 }
 566
 567 static bool is_virtio_scsi_device(IplParameterBlock *iplb)
 568 {
 569     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
 570 }
 571
 572 static void update_machine_ipl_properties(IplParameterBlock *iplb)
 573 {
 574     Object *machine = qdev_get_machine();
 575     Error *err = NULL;
 576
 577     /* Sync loadparm */
 578     if (iplb->flags & DIAG308_FLAGS_LP_VALID) {
 579         uint8_t *ebcdic_loadparm = iplb->loadparm;
 580         char ascii_loadparm[9];
 581         int i;
 582
 583         for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) {
 584             ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]];
 585         }
 586         ascii_loadparm[i] = 0;
 587         object_property_set_str(machine, "loadparm", ascii_loadparm, &err);
 588     } else {
 589         object_property_set_str(machine, "loadparm", "", &err);
 590     }
 591     if (err) {
 592         warn_report_err(err);
 593     }
 594 }
 595
 596 void s390_ipl_update_diag308(IplParameterBlock *iplb)
 597 {
 598     S390IPLState *ipl = get_ipl_device();
 599
 600     /*
 601      * The IPLB set and retrieved by subcodes 8/9 is completely
 602      * separate from the one managed via subcodes 5/6.
 603      */
 604     if (iplb->pbt == S390_IPL_TYPE_PV) {
 605         ipl->iplb_pv = *iplb;
 606         ipl->iplb_valid_pv = true;
 607     } else {
 608         ipl->iplb = *iplb;
 609         ipl->iplb_valid = true;
 610     }
 611     ipl->netboot = is_virtio_net_device(iplb);
 612     update_machine_ipl_properties(iplb);
 613 }
 614
 615 IplParameterBlock *s390_ipl_get_iplb_pv(void)
 616 {
 617     S390IPLState *ipl = get_ipl_device();
 618
 619     if (!ipl->iplb_valid_pv) {
 620         return NULL;
 621     }
 622     return &ipl->iplb_pv;
 623 }
 624
 625 IplParameterBlock *s390_ipl_get_iplb(void)
 626 {
 627     S390IPLState *ipl = get_ipl_device();
 628
 629     if (!ipl->iplb_valid) {
 630         return NULL;
 631     }
 632     return &ipl->iplb;
 633 }
 634
 635 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
 636 {
 637     S390IPLState *ipl = get_ipl_device();
 638
 639     if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
 640         /* use CPU 0 for full resets */
 641         ipl->reset_cpu_index = 0;
 642     } else {
 643         ipl->reset_cpu_index = cs->cpu_index;
 644     }
 645     ipl->reset_type = reset_type;
 646
 647     if (reset_type == S390_RESET_REIPL &&
 648         ipl->iplb_valid &&
 649         !ipl->netboot &&
 650         ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
 651         is_virtio_scsi_device(&ipl->iplb)) {
 652         CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
 653
 654         if (ccw_dev &&
 655             cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
 656             (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
 657             /*
 658              * this is the original boot device's SCSI
 659              * so restore IPL parameter info from it
 660              */
 661             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 662         }
 663     }
 664     if (reset_type == S390_RESET_MODIFIED_CLEAR ||
 665         reset_type == S390_RESET_LOAD_NORMAL ||
 666         reset_type == S390_RESET_PV) {
 667         /* ignore -no-reboot, send no event  */
 668         qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
 669     } else {
 670         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 671     }
 672     /* as this is triggered by a CPU, make sure to exit the loop */
 673     if (tcg_enabled()) {
 674         cpu_loop_exit(cs);
 675     }
 676 }
 677
 678 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
 679 {
 680     S390IPLState *ipl = get_ipl_device();
 681
 682     *cs = qemu_get_cpu(ipl->reset_cpu_index);
 683     if (!*cs) {
 684         /* use any CPU */
 685         *cs = first_cpu;
 686     }
 687     *reset_type = ipl->reset_type;
 688 }
 689
 690 void s390_ipl_clear_reset_request(void)
 691 {
 692     S390IPLState *ipl = get_ipl_device();
 693
 694     ipl->reset_type = S390_RESET_EXTERNAL;
 695     /* use CPU 0 for full resets */
 696     ipl->reset_cpu_index = 0;
 697 }
 698
 699 static void s390_ipl_prepare_qipl(S390CPU *cpu)
 700 {
 701     S390IPLState *ipl = get_ipl_device();
 702     uint8_t *addr;
 703     uint64_t len = 4096;
 704
 705     addr = cpu_physical_memory_map(cpu->env.psa, &len, true);
 706     if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
 707         error_report("Cannot set QEMU IPL parameters");
 708         return;
 709     }
 710     memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
 711     cpu_physical_memory_unmap(addr, len, 1, len);
 712 }
 713
 714 int s390_ipl_prepare_pv_header(void)
 715 {
 716     IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
 717     IPLBlockPV *ipib_pv = &ipib->pv;
 718     void *hdr = g_malloc(ipib_pv->pv_header_len);
 719     int rc;
 720
 721     cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr,
 722                              ipib_pv->pv_header_len);
 723     rc = s390_pv_set_sec_parms((uintptr_t)hdr,
 724                                ipib_pv->pv_header_len);
 725     g_free(hdr);
 726     return rc;
 727 }
 728
 729 int s390_ipl_pv_unpack(void)
 730 {
 731     IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
 732     IPLBlockPV *ipib_pv = &ipib->pv;
 733     int i, rc = 0;
 734
 735     for (i = 0; i < ipib_pv->num_comp; i++) {
 736         rc = s390_pv_unpack(ipib_pv->components[i].addr,
 737                             TARGET_PAGE_ALIGN(ipib_pv->components[i].size),
 738                             ipib_pv->components[i].tweak_pref);
 739         if (rc) {
 740             break;
 741         }
 742     }
 743     return rc;
 744 }
 745
 746 void s390_ipl_prepare_cpu(S390CPU *cpu)
 747 {
 748     S390IPLState *ipl = get_ipl_device();
 749
 750     cpu->env.psw.addr = ipl->start_addr;
 751     cpu->env.psw.mask = IPL_PSW_MASK;
 752
 753     if (!ipl->kernel || ipl->iplb_valid) {
 754         cpu->env.psw.addr = ipl->bios_start_addr;
 755         if (!ipl->iplb_valid) {
 756             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 757         }
 758     }
 759     if (ipl->netboot) {
 760         load_netboot_image(&error_fatal);
 761         ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
 762     }
 763     s390_ipl_set_boot_menu(ipl);
 764     s390_ipl_prepare_qipl(cpu);
 765 }
 766
 767 static void s390_ipl_reset(DeviceState *dev)
 768 {
 769     S390IPLState *ipl = S390_IPL(dev);
 770
 771     if (ipl->reset_type != S390_RESET_REIPL) {
 772         ipl->iplb_valid = false;
 773         memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
 774     }
 775 }
 776
 777 static void s390_ipl_class_init(ObjectClass *klass, void *data)
 778 {
 779     DeviceClass *dc = DEVICE_CLASS(klass);
 780
 781     dc->realize = s390_ipl_realize;
 782     device_class_set_props(dc, s390_ipl_properties);
 783     dc->reset = s390_ipl_reset;
 784     dc->vmsd = &vmstate_ipl;
 785     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 786     /* Reason: Loads the ROMs and thus can only be used one time - internally */
 787     dc->user_creatable = false;
 788 }
 789
 790 static const TypeInfo s390_ipl_info = {
 791     .class_init = s390_ipl_class_init,
 792     .parent = TYPE_DEVICE,
 793     .name  = TYPE_S390_IPL,
 794     .instance_size  = sizeof(S390IPLState),
 795 };
 796
 797 static void s390_ipl_register_types(void)
 798 {
 799     type_register_static(&s390_ipl_info);
 800 }
 801
 802 type_init(s390_ipl_register_types)