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