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 "qapi/error.h"
  18 #include "sysemu/reset.h"
  19 #include "sysemu/runstate.h"
  20 #include "sysemu/sysemu.h"
  21 #include "sysemu/tcg.h"
  22 #include "cpu.h"
  23 #include "elf.h"
  24 #include "hw/loader.h"
  25 #include "hw/qdev-properties.h"
  26 #include "hw/boards.h"
  27 #include "hw/s390x/virtio-ccw.h"
  28 #include "hw/s390x/vfio-ccw.h"
  29 #include "hw/s390x/css.h"
  30 #include "hw/s390x/ebcdic.h"
  31 #include "hw/s390x/pv.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 "exec/exec-all.h"
  38
  39 #define KERN_IMAGE_START                0x010000UL
  40 #define LINUX_MAGIC_ADDR                0x010008UL
  41 #define KERN_PARM_AREA                  0x010480UL
  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             char *parm_area = rom_ptr(KERN_PARM_AREA, strlen(ipl->cmdline) + 1);
 195             ipl->start_addr = KERN_IMAGE_START;
 196             /* Overwrite parameters in the kernel image, which are "rom" */
 197             if (parm_area) {
 198                 strcpy(parm_area, ipl->cmdline);
 199             }
 200         } else {
 201             ipl->start_addr = pentry;
 202         }
 203
 204         if (ipl->initrd) {
 205             ram_addr_t initrd_offset;
 206             int initrd_size;
 207             uint64_t *romptr;
 208
 209             initrd_offset = INITRD_START;
 210             while (kernel_size + 0x100000 > initrd_offset) {
 211                 initrd_offset += 0x100000;
 212             }
 213             initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
 214                                               ms->ram_size - initrd_offset);
 215             if (initrd_size == -1) {
 216                 error_setg(errp, "could not load initrd '%s'", ipl->initrd);
 217                 return;
 218             }
 219
 220             /*
 221              * we have to overwrite values in the kernel image,
 222              * which are "rom"
 223              */
 224             romptr = rom_ptr(INITRD_PARM_START, 16);
 225             if (romptr) {
 226                 stq_p(romptr, initrd_offset);
 227                 stq_p(romptr + 1, initrd_size);
 228             }
 229         }
 230     }
 231     /*
 232      * Don't ever use the migrated values, they could come from a different
 233      * BIOS and therefore don't work. But still migrate the values, so
 234      * QEMUs relying on it don't break.
 235      */
 236     ipl->compat_start_addr = ipl->start_addr;
 237     ipl->compat_bios_start_addr = ipl->bios_start_addr;
 238     /*
 239      * Because this Device is not on any bus in the qbus tree (it is
 240      * not a sysbus device and it's not on some other bus like a PCI
 241      * bus) it will not be automatically reset by the 'reset the
 242      * sysbus' hook registered by vl.c like most devices. So we must
 243      * manually register a reset hook for it.
 244      * TODO: there should be a better way to do this.
 245      */
 246     qemu_register_reset(resettable_cold_reset_fn, dev);
 247 }
 248
 249 static Property s390_ipl_properties[] = {
 250     DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
 251     DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
 252     DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
 253     DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
 254     DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
 255     DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
 256     DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
 257                      true),
 258     DEFINE_PROP_END_OF_LIST(),
 259 };
 260
 261 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
 262 {
 263     QemuOptsList *plist = qemu_find_opts("boot-opts");
 264     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 265     const char *tmp;
 266     unsigned long splash_time = 0;
 267
 268     if (!get_boot_device(0)) {
 269         if (boot_menu) {
 270             error_report("boot menu requires a bootindex to be specified for "
 271                          "the IPL device");
 272         }
 273         return;
 274     }
 275
 276     switch (ipl->iplb.pbt) {
 277     case S390_IPL_TYPE_CCW:
 278         /* In the absence of -boot menu, use zipl parameters */
 279         if (!qemu_opt_get(opts, "menu")) {
 280             ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
 281             return;
 282         }
 283         break;
 284     case S390_IPL_TYPE_QEMU_SCSI:
 285         break;
 286     default:
 287         if (boot_menu) {
 288             error_report("boot menu is not supported for this device type");
 289         }
 290         return;
 291     }
 292
 293     if (!boot_menu) {
 294         return;
 295     }
 296
 297     ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
 298
 299     tmp = qemu_opt_get(opts, "splash-time");
 300
 301     if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
 302         error_report("splash-time is invalid, forcing it to 0");
 303         ipl->qipl.boot_menu_timeout = 0;
 304         return;
 305     }
 306
 307     if (splash_time > 0xffffffff) {
 308         error_report("splash-time is too large, forcing it to max value");
 309         ipl->qipl.boot_menu_timeout = 0xffffffff;
 310         return;
 311     }
 312
 313     ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
 314 }
 315
 316 #define CCW_DEVTYPE_NONE        0x00
 317 #define CCW_DEVTYPE_VIRTIO      0x01
 318 #define CCW_DEVTYPE_VIRTIO_NET  0x02
 319 #define CCW_DEVTYPE_SCSI        0x03
 320 #define CCW_DEVTYPE_VFIO        0x04
 321
 322 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
 323 {
 324     CcwDevice *ccw_dev = NULL;
 325     int tmp_dt = CCW_DEVTYPE_NONE;
 326
 327     if (dev_st) {
 328         VirtIONet *virtio_net_dev = (VirtIONet *)
 329             object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
 330         VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
 331             object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
 332                                 TYPE_VIRTIO_CCW_DEVICE);
 333         VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
 334             object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
 335
 336         if (virtio_ccw_dev) {
 337             ccw_dev = CCW_DEVICE(virtio_ccw_dev);
 338             if (virtio_net_dev) {
 339                 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
 340             } else {
 341                 tmp_dt = CCW_DEVTYPE_VIRTIO;
 342             }
 343         } else if (vfio_ccw_dev) {
 344             ccw_dev = CCW_DEVICE(vfio_ccw_dev);
 345             tmp_dt = CCW_DEVTYPE_VFIO;
 346         } else {
 347             SCSIDevice *sd = (SCSIDevice *)
 348                 object_dynamic_cast(OBJECT(dev_st),
 349                                     TYPE_SCSI_DEVICE);
 350             if (sd) {
 351                 SCSIBus *bus = scsi_bus_from_device(sd);
 352                 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
 353                 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
 354                                                        vdev);
 355
 356                 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
 357                                                            TYPE_CCW_DEVICE);
 358                 tmp_dt = CCW_DEVTYPE_SCSI;
 359             }
 360         }
 361     }
 362     if (devtype) {
 363         *devtype = tmp_dt;
 364     }
 365     return ccw_dev;
 366 }
 367
 368 static bool s390_gen_initial_iplb(S390IPLState *ipl)
 369 {
 370     DeviceState *dev_st;
 371     CcwDevice *ccw_dev = NULL;
 372     SCSIDevice *sd;
 373     int devtype;
 374
 375     dev_st = get_boot_device(0);
 376     if (dev_st) {
 377         ccw_dev = s390_get_ccw_device(dev_st, &devtype);
 378     }
 379
 380     /*
 381      * Currently allow IPL only from CCW devices.
 382      */
 383     if (ccw_dev) {
 384         switch (devtype) {
 385         case CCW_DEVTYPE_SCSI:
 386             sd = SCSI_DEVICE(dev_st);
 387             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
 388             ipl->iplb.blk0_len =
 389                 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
 390             ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
 391             ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
 392             ipl->iplb.scsi.target = cpu_to_be16(sd->id);
 393             ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
 394             ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
 395             ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
 396             break;
 397         case CCW_DEVTYPE_VFIO:
 398             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 399             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 400             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 401             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 402             break;
 403         case CCW_DEVTYPE_VIRTIO_NET:
 404             ipl->netboot = true;
 405             /* Fall through to CCW_DEVTYPE_VIRTIO case */
 406         case CCW_DEVTYPE_VIRTIO:
 407             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 408             ipl->iplb.blk0_len =
 409                 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
 410             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 411             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 412             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 413             break;
 414         }
 415
 416         if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
 417             ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
 418         }
 419
 420         return true;
 421     }
 422
 423     return false;
 424 }
 425
 426 int s390_ipl_set_loadparm(uint8_t *loadparm)
 427 {
 428     MachineState *machine = MACHINE(qdev_get_machine());
 429     char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
 430
 431     if (lp) {
 432         int i;
 433
 434         /* lp is an uppercase string without leading/embedded spaces */
 435         for (i = 0; i < 8 && lp[i]; i++) {
 436             loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
 437         }
 438
 439         if (i < 8) {
 440             memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
 441         }
 442
 443         g_free(lp);
 444         return 0;
 445     }
 446
 447     return -1;
 448 }
 449
 450 static int load_netboot_image(Error **errp)
 451 {
 452     MachineState *ms = MACHINE(qdev_get_machine());
 453     S390IPLState *ipl = get_ipl_device();
 454     char *netboot_filename;
 455     MemoryRegion *sysmem =  get_system_memory();
 456     MemoryRegion *mr = NULL;
 457     void *ram_ptr = NULL;
 458     int img_size = -1;
 459
 460     mr = memory_region_find(sysmem, 0, 1).mr;
 461     if (!mr) {
 462         error_setg(errp, "Failed to find memory region at address 0");
 463         return -1;
 464     }
 465
 466     ram_ptr = memory_region_get_ram_ptr(mr);
 467     if (!ram_ptr) {
 468         error_setg(errp, "No RAM found");
 469         goto unref_mr;
 470     }
 471
 472     netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
 473     if (netboot_filename == NULL) {
 474         error_setg(errp, "Could not find network bootloader '%s'",
 475                    ipl->netboot_fw);
 476         goto unref_mr;
 477     }
 478
 479     img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
 480                             &ipl->start_addr,
 481                             NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL,
 482                             false);
 483
 484     if (img_size < 0) {
 485         img_size = load_image_size(netboot_filename, ram_ptr, ms->ram_size);
 486         ipl->start_addr = KERN_IMAGE_START;
 487     }
 488
 489     if (img_size < 0) {
 490         error_setg(errp, "Failed to load network bootloader");
 491     }
 492
 493     g_free(netboot_filename);
 494
 495 unref_mr:
 496     memory_region_unref(mr);
 497     return img_size;
 498 }
 499
 500 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
 501                                          int virtio_id)
 502 {
 503     uint8_t cssid;
 504     uint8_t ssid;
 505     uint16_t devno;
 506     uint16_t schid;
 507     SubchDev *sch = NULL;
 508
 509     if (iplb->pbt != S390_IPL_TYPE_CCW) {
 510         return false;
 511     }
 512
 513     devno = be16_to_cpu(iplb->ccw.devno);
 514     ssid = iplb->ccw.ssid & 3;
 515
 516     for (schid = 0; schid < MAX_SCHID; schid++) {
 517         for (cssid = 0; cssid < MAX_CSSID; cssid++) {
 518             sch = css_find_subch(1, cssid, ssid, schid);
 519
 520             if (sch && sch->devno == devno) {
 521                 return sch->id.cu_model == virtio_id;
 522             }
 523         }
 524     }
 525     return false;
 526 }
 527
 528 static bool is_virtio_net_device(IplParameterBlock *iplb)
 529 {
 530     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
 531 }
 532
 533 static bool is_virtio_scsi_device(IplParameterBlock *iplb)
 534 {
 535     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
 536 }
 537
 538 static void update_machine_ipl_properties(IplParameterBlock *iplb)
 539 {
 540     Object *machine = qdev_get_machine();
 541     Error *err = NULL;
 542
 543     /* Sync loadparm */
 544     if (iplb->flags & DIAG308_FLAGS_LP_VALID) {
 545         uint8_t *ebcdic_loadparm = iplb->loadparm;
 546         char ascii_loadparm[9];
 547         int i;
 548
 549         for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) {
 550             ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]];
 551         }
 552         ascii_loadparm[i] = 0;
 553         object_property_set_str(machine, "loadparm", ascii_loadparm, &err);
 554     } else {
 555         object_property_set_str(machine, "loadparm", "", &err);
 556     }
 557     if (err) {
 558         warn_report_err(err);
 559     }
 560 }
 561
 562 void s390_ipl_update_diag308(IplParameterBlock *iplb)
 563 {
 564     S390IPLState *ipl = get_ipl_device();
 565
 566     /*
 567      * The IPLB set and retrieved by subcodes 8/9 is completely
 568      * separate from the one managed via subcodes 5/6.
 569      */
 570     if (iplb->pbt == S390_IPL_TYPE_PV) {
 571         ipl->iplb_pv = *iplb;
 572         ipl->iplb_valid_pv = true;
 573     } else {
 574         ipl->iplb = *iplb;
 575         ipl->iplb_valid = true;
 576     }
 577     ipl->netboot = is_virtio_net_device(iplb);
 578     update_machine_ipl_properties(iplb);
 579 }
 580
 581 IplParameterBlock *s390_ipl_get_iplb_pv(void)
 582 {
 583     S390IPLState *ipl = get_ipl_device();
 584
 585     if (!ipl->iplb_valid_pv) {
 586         return NULL;
 587     }
 588     return &ipl->iplb_pv;
 589 }
 590
 591 IplParameterBlock *s390_ipl_get_iplb(void)
 592 {
 593     S390IPLState *ipl = get_ipl_device();
 594
 595     if (!ipl->iplb_valid) {
 596         return NULL;
 597     }
 598     return &ipl->iplb;
 599 }
 600
 601 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
 602 {
 603     S390IPLState *ipl = get_ipl_device();
 604
 605     if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
 606         /* use CPU 0 for full resets */
 607         ipl->reset_cpu_index = 0;
 608     } else {
 609         ipl->reset_cpu_index = cs->cpu_index;
 610     }
 611     ipl->reset_type = reset_type;
 612
 613     if (reset_type == S390_RESET_REIPL &&
 614         ipl->iplb_valid &&
 615         !ipl->netboot &&
 616         ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
 617         is_virtio_scsi_device(&ipl->iplb)) {
 618         CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
 619
 620         if (ccw_dev &&
 621             cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
 622             (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
 623             /*
 624              * this is the original boot device's SCSI
 625              * so restore IPL parameter info from it
 626              */
 627             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 628         }
 629     }
 630     if (reset_type == S390_RESET_MODIFIED_CLEAR ||
 631         reset_type == S390_RESET_LOAD_NORMAL ||
 632         reset_type == S390_RESET_PV) {
 633         /* ignore -no-reboot, send no event  */
 634         qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
 635     } else {
 636         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 637     }
 638     /* as this is triggered by a CPU, make sure to exit the loop */
 639     if (tcg_enabled()) {
 640         cpu_loop_exit(cs);
 641     }
 642 }
 643
 644 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
 645 {
 646     S390IPLState *ipl = get_ipl_device();
 647
 648     *cs = qemu_get_cpu(ipl->reset_cpu_index);
 649     if (!*cs) {
 650         /* use any CPU */
 651         *cs = first_cpu;
 652     }
 653     *reset_type = ipl->reset_type;
 654 }
 655
 656 void s390_ipl_clear_reset_request(void)
 657 {
 658     S390IPLState *ipl = get_ipl_device();
 659
 660     ipl->reset_type = S390_RESET_EXTERNAL;
 661     /* use CPU 0 for full resets */
 662     ipl->reset_cpu_index = 0;
 663 }
 664
 665 static void s390_ipl_prepare_qipl(S390CPU *cpu)
 666 {
 667     S390IPLState *ipl = get_ipl_device();
 668     uint8_t *addr;
 669     uint64_t len = 4096;
 670
 671     addr = cpu_physical_memory_map(cpu->env.psa, &len, true);
 672     if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
 673         error_report("Cannot set QEMU IPL parameters");
 674         return;
 675     }
 676     memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
 677     cpu_physical_memory_unmap(addr, len, 1, len);
 678 }
 679
 680 int s390_ipl_prepare_pv_header(void)
 681 {
 682     IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
 683     IPLBlockPV *ipib_pv = &ipib->pv;
 684     void *hdr = g_malloc(ipib_pv->pv_header_len);
 685     int rc;
 686
 687     cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr,
 688                              ipib_pv->pv_header_len);
 689     rc = s390_pv_set_sec_parms((uintptr_t)hdr,
 690                                ipib_pv->pv_header_len);
 691     g_free(hdr);
 692     return rc;
 693 }
 694
 695 int s390_ipl_pv_unpack(void)
 696 {
 697     IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
 698     IPLBlockPV *ipib_pv = &ipib->pv;
 699     int i, rc = 0;
 700
 701     for (i = 0; i < ipib_pv->num_comp; i++) {
 702         rc = s390_pv_unpack(ipib_pv->components[i].addr,
 703                             TARGET_PAGE_ALIGN(ipib_pv->components[i].size),
 704                             ipib_pv->components[i].tweak_pref);
 705         if (rc) {
 706             break;
 707         }
 708     }
 709     return rc;
 710 }
 711
 712 void s390_ipl_prepare_cpu(S390CPU *cpu)
 713 {
 714     S390IPLState *ipl = get_ipl_device();
 715     Error *err = NULL;
 716
 717     cpu->env.psw.addr = ipl->start_addr;
 718     cpu->env.psw.mask = IPL_PSW_MASK;
 719
 720     if (!ipl->kernel || ipl->iplb_valid) {
 721         cpu->env.psw.addr = ipl->bios_start_addr;
 722         if (!ipl->iplb_valid) {
 723             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 724         }
 725     }
 726     if (ipl->netboot) {
 727         if (load_netboot_image(&err) < 0) {
 728             error_report_err(err);
 729             exit(1);
 730         }
 731         ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
 732     }
 733     s390_ipl_set_boot_menu(ipl);
 734     s390_ipl_prepare_qipl(cpu);
 735 }
 736
 737 static void s390_ipl_reset(DeviceState *dev)
 738 {
 739     S390IPLState *ipl = S390_IPL(dev);
 740
 741     if (ipl->reset_type != S390_RESET_REIPL) {
 742         ipl->iplb_valid = false;
 743         memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
 744     }
 745 }
 746
 747 static void s390_ipl_class_init(ObjectClass *klass, void *data)
 748 {
 749     DeviceClass *dc = DEVICE_CLASS(klass);
 750
 751     dc->realize = s390_ipl_realize;
 752     device_class_set_props(dc, s390_ipl_properties);
 753     dc->reset = s390_ipl_reset;
 754     dc->vmsd = &vmstate_ipl;
 755     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 756     /* Reason: Loads the ROMs and thus can only be used one time - internally */
 757     dc->user_creatable = false;
 758 }
 759
 760 static const TypeInfo s390_ipl_info = {
 761     .class_init = s390_ipl_class_init,
 762     .parent = TYPE_DEVICE,
 763     .name  = TYPE_S390_IPL,
 764     .instance_size  = sizeof(S390IPLState),
 765 };
 766
 767 static void s390_ipl_register_types(void)
 768 {
 769     type_register_static(&s390_ipl_info);
 770 }
 771
 772 type_init(s390_ipl_register_types)