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