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