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