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/datadir.h"
  17 #include "qapi/error.h"
  18 #include "sysemu/reset.h"
  19 #include "sysemu/runstate.h"
  20 #include "sysemu/tcg.h"
  21 #include "elf.h"
  22 #include "hw/loader.h"
  23 #include "hw/qdev-properties.h"
  24 #include "hw/boards.h"
  25 #include "hw/s390x/virtio-ccw.h"
  26 #include "hw/s390x/vfio-ccw.h"
  27 #include "hw/s390x/css.h"
  28 #include "hw/s390x/ebcdic.h"
  29 #include "hw/s390x/pv.h"
  30 #include "ipl.h"
  31 #include "qemu/error-report.h"
  32 #include "qemu/config-file.h"
  33 #include "qemu/cutils.h"
  34 #include "qemu/option.h"
  35 #include "exec/exec-all.h"
  36
  37 #define KERN_IMAGE_START                0x010000UL
  38 #define LINUX_MAGIC_ADDR                0x010008UL
  39 #define KERN_PARM_AREA_SIZE_ADDR        0x010430UL
  40 #define KERN_PARM_AREA                  0x010480UL
  41 #define LEGACY_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 uint64_t get_max_kernel_cmdline_size(void)
 114 {
 115     uint64_t *size_ptr = rom_ptr(KERN_PARM_AREA_SIZE_ADDR, sizeof(*size_ptr));
 116
 117     if (size_ptr) {
 118         uint64_t size;
 119
 120         size = be64_to_cpu(*size_ptr);
 121         if (size) {
 122             return size;
 123         }
 124     }
 125     return LEGACY_KERN_PARM_AREA_SIZE;
 126 }
 127
 128 static void s390_ipl_realize(DeviceState *dev, Error **errp)
 129 {
 130     MachineState *ms = MACHINE(qdev_get_machine());
 131     S390IPLState *ipl = S390_IPL(dev);
 132     uint32_t *ipl_psw;
 133     uint64_t pentry;
 134     char *magic;
 135     int kernel_size;
 136
 137     int bios_size;
 138     char *bios_filename;
 139
 140     /*
 141      * Always load the bios if it was enforced,
 142      * even if an external kernel has been defined.
 143      */
 144     if (!ipl->kernel || ipl->enforce_bios) {
 145         uint64_t fwbase = (MIN(ms->ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
 146
 147         bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->firmware);
 148         if (bios_filename == NULL) {
 149             error_setg(errp, "could not find stage1 bootloader");
 150             return;
 151         }
 152
 153         bios_size = load_elf(bios_filename, NULL,
 154                              bios_translate_addr, &fwbase,
 155                              &ipl->bios_start_addr, NULL, NULL, NULL, 1,
 156                              EM_S390, 0, 0);
 157         if (bios_size > 0) {
 158             /* Adjust ELF start address to final location */
 159             ipl->bios_start_addr += fwbase;
 160         } else {
 161             /* Try to load non-ELF file */
 162             bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
 163                                             4096);
 164             ipl->bios_start_addr = ZIPL_IMAGE_START;
 165         }
 166         g_free(bios_filename);
 167
 168         if (bios_size == -1) {
 169             error_setg(errp, "could not load bootloader '%s'", ipl->firmware);
 170             return;
 171         }
 172
 173         /* default boot target is the bios */
 174         ipl->start_addr = ipl->bios_start_addr;
 175     }
 176
 177     if (ipl->kernel) {
 178         kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL,
 179                                &pentry, NULL,
 180                                NULL, NULL, 1, EM_S390, 0, 0);
 181         if (kernel_size < 0) {
 182             kernel_size = load_image_targphys(ipl->kernel, 0, ms->ram_size);
 183             if (kernel_size < 0) {
 184                 error_setg(errp, "could not load kernel '%s'", ipl->kernel);
 185                 return;
 186             }
 187             /* if this is Linux use KERN_IMAGE_START */
 188             magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
 189             if (magic && !memcmp(magic, "S390EP", 6)) {
 190                 pentry = KERN_IMAGE_START;
 191             } else {
 192                 /* if not Linux load the address of the (short) IPL PSW */
 193                 ipl_psw = rom_ptr(4, 4);
 194                 if (ipl_psw) {
 195                     pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR;
 196                 } else {
 197                     error_setg(errp, "Could not get IPL PSW");
 198                     return;
 199                 }
 200             }
 201         }
 202         /*
 203          * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
 204          * kernel parameters here as well. Note: For old kernels (up to 3.2)
 205          * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
 206          * loader) and it won't work. For this case we force it to 0x10000, too.
 207          */
 208         if (pentry == KERN_IMAGE_START || pentry == 0x800) {
 209             size_t cmdline_size = strlen(ipl->cmdline) + 1;
 210             char *parm_area = rom_ptr(KERN_PARM_AREA, cmdline_size);
 211
 212             ipl->start_addr = KERN_IMAGE_START;
 213             /* Overwrite parameters in the kernel image, which are "rom" */
 214             if (parm_area) {
 215                 uint64_t max_cmdline_size = get_max_kernel_cmdline_size();
 216
 217                 if (cmdline_size > max_cmdline_size) {
 218                     error_setg(errp,
 219                                "kernel command line exceeds maximum size:"
 220                                " %zu > %" PRIu64,
 221                                cmdline_size, max_cmdline_size);
 222                     return;
 223                 }
 224
 225                 strcpy(parm_area, ipl->cmdline);
 226             }
 227         } else {
 228             ipl->start_addr = pentry;
 229         }
 230
 231         if (ipl->initrd) {
 232             ram_addr_t initrd_offset;
 233             int initrd_size;
 234             uint64_t *romptr;
 235
 236             initrd_offset = INITRD_START;
 237             while (kernel_size + 0x100000 > initrd_offset) {
 238                 initrd_offset += 0x100000;
 239             }
 240             initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
 241                                               ms->ram_size - initrd_offset);
 242             if (initrd_size == -1) {
 243                 error_setg(errp, "could not load initrd '%s'", ipl->initrd);
 244                 return;
 245             }
 246
 247             /*
 248              * we have to overwrite values in the kernel image,
 249              * which are "rom"
 250              */
 251             romptr = rom_ptr(INITRD_PARM_START, 16);
 252             if (romptr) {
 253                 stq_p(romptr, initrd_offset);
 254                 stq_p(romptr + 1, initrd_size);
 255             }
 256         }
 257     }
 258     /*
 259      * Don't ever use the migrated values, they could come from a different
 260      * BIOS and therefore don't work. But still migrate the values, so
 261      * QEMUs relying on it don't break.
 262      */
 263     ipl->compat_start_addr = ipl->start_addr;
 264     ipl->compat_bios_start_addr = ipl->bios_start_addr;
 265     /*
 266      * Because this Device is not on any bus in the qbus tree (it is
 267      * not a sysbus device and it's not on some other bus like a PCI
 268      * bus) it will not be automatically reset by the 'reset the
 269      * sysbus' hook registered by vl.c like most devices. So we must
 270      * manually register a reset hook for it.
 271      * TODO: there should be a better way to do this.
 272      */
 273     qemu_register_reset(resettable_cold_reset_fn, dev);
 274 }
 275
 276 static Property s390_ipl_properties[] = {
 277     DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
 278     DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
 279     DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
 280     DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
 281     DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
 282     DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
 283     DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
 284                      true),
 285     DEFINE_PROP_END_OF_LIST(),
 286 };
 287
 288 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
 289 {
 290     QemuOptsList *plist = qemu_find_opts("boot-opts");
 291     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 292     const char *tmp;
 293     unsigned long splash_time = 0;
 294
 295     if (!get_boot_device(0)) {
 296         if (boot_menu) {
 297             error_report("boot menu requires a bootindex to be specified for "
 298                          "the IPL device");
 299         }
 300         return;
 301     }
 302
 303     switch (ipl->iplb.pbt) {
 304     case S390_IPL_TYPE_CCW:
 305         /* In the absence of -boot menu, use zipl parameters */
 306         if (!qemu_opt_get(opts, "menu")) {
 307             ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
 308             return;
 309         }
 310         break;
 311     case S390_IPL_TYPE_QEMU_SCSI:
 312         break;
 313     default:
 314         if (boot_menu) {
 315             error_report("boot menu is not supported for this device type");
 316         }
 317         return;
 318     }
 319
 320     if (!boot_menu) {
 321         return;
 322     }
 323
 324     ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
 325
 326     tmp = qemu_opt_get(opts, "splash-time");
 327
 328     if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
 329         error_report("splash-time is invalid, forcing it to 0");
 330         ipl->qipl.boot_menu_timeout = 0;
 331         return;
 332     }
 333
 334     if (splash_time > 0xffffffff) {
 335         error_report("splash-time is too large, forcing it to max value");
 336         ipl->qipl.boot_menu_timeout = 0xffffffff;
 337         return;
 338     }
 339
 340     ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
 341 }
 342
 343 #define CCW_DEVTYPE_NONE        0x00
 344 #define CCW_DEVTYPE_VIRTIO      0x01
 345 #define CCW_DEVTYPE_VIRTIO_NET  0x02
 346 #define CCW_DEVTYPE_SCSI        0x03
 347 #define CCW_DEVTYPE_VFIO        0x04
 348
 349 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
 350 {
 351     CcwDevice *ccw_dev = NULL;
 352     int tmp_dt = CCW_DEVTYPE_NONE;
 353
 354     if (dev_st) {
 355         VirtIONet *virtio_net_dev = (VirtIONet *)
 356             object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
 357         VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
 358             object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
 359                                 TYPE_VIRTIO_CCW_DEVICE);
 360         VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
 361             object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
 362
 363         if (virtio_ccw_dev) {
 364             ccw_dev = CCW_DEVICE(virtio_ccw_dev);
 365             if (virtio_net_dev) {
 366                 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
 367             } else {
 368                 tmp_dt = CCW_DEVTYPE_VIRTIO;
 369             }
 370         } else if (vfio_ccw_dev) {
 371             ccw_dev = CCW_DEVICE(vfio_ccw_dev);
 372             tmp_dt = CCW_DEVTYPE_VFIO;
 373         } else {
 374             SCSIDevice *sd = (SCSIDevice *)
 375                 object_dynamic_cast(OBJECT(dev_st),
 376                                     TYPE_SCSI_DEVICE);
 377             if (sd) {
 378                 SCSIBus *sbus = scsi_bus_from_device(sd);
 379                 VirtIODevice *vdev = (VirtIODevice *)
 380                     object_dynamic_cast(OBJECT(sbus->qbus.parent),
 381                                         TYPE_VIRTIO_DEVICE);
 382                 if (vdev) {
 383                     ccw_dev = (CcwDevice *)
 384                         object_dynamic_cast(OBJECT(qdev_get_parent_bus(DEVICE(vdev))->parent),
 385                                             TYPE_CCW_DEVICE);
 386                     if (ccw_dev) {
 387                         tmp_dt = CCW_DEVTYPE_SCSI;
 388                     }
 389                 }
 390             }
 391         }
 392     }
 393     if (devtype) {
 394         *devtype = tmp_dt;
 395     }
 396     return ccw_dev;
 397 }
 398
 399 static bool s390_gen_initial_iplb(S390IPLState *ipl)
 400 {
 401     DeviceState *dev_st;
 402     CcwDevice *ccw_dev = NULL;
 403     SCSIDevice *sd;
 404     int devtype;
 405
 406     dev_st = get_boot_device(0);
 407     if (dev_st) {
 408         ccw_dev = s390_get_ccw_device(dev_st, &devtype);
 409     }
 410
 411     /*
 412      * Currently allow IPL only from CCW devices.
 413      */
 414     if (ccw_dev) {
 415         switch (devtype) {
 416         case CCW_DEVTYPE_SCSI:
 417             sd = SCSI_DEVICE(dev_st);
 418             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
 419             ipl->iplb.blk0_len =
 420                 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
 421             ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
 422             ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
 423             ipl->iplb.scsi.target = cpu_to_be16(sd->id);
 424             ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
 425             ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
 426             ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
 427             break;
 428         case CCW_DEVTYPE_VFIO:
 429             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 430             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 431             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 432             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 433             break;
 434         case CCW_DEVTYPE_VIRTIO_NET:
 435             ipl->netboot = true;
 436             /* Fall through to CCW_DEVTYPE_VIRTIO case */
 437         case CCW_DEVTYPE_VIRTIO:
 438             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 439             ipl->iplb.blk0_len =
 440                 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
 441             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 442             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 443             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 444             break;
 445         }
 446
 447         if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
 448             ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
 449         }
 450
 451         return true;
 452     }
 453
 454     return false;
 455 }
 456
 457 int s390_ipl_set_loadparm(uint8_t *loadparm)
 458 {
 459     MachineState *machine = MACHINE(qdev_get_machine());
 460     char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
 461
 462     if (lp) {
 463         int i;
 464
 465         /* lp is an uppercase string without leading/embedded spaces */
 466         for (i = 0; i < 8 && lp[i]; i++) {
 467             loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
 468         }
 469
 470         if (i < 8) {
 471             memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
 472         }
 473
 474         g_free(lp);
 475         return 0;
 476     }
 477
 478     return -1;
 479 }
 480
 481 static int load_netboot_image(Error **errp)
 482 {
 483     MachineState *ms = MACHINE(qdev_get_machine());
 484     S390IPLState *ipl = get_ipl_device();
 485     char *netboot_filename;
 486     MemoryRegion *sysmem =  get_system_memory();
 487     MemoryRegion *mr = NULL;
 488     void *ram_ptr = NULL;
 489     int img_size = -1;
 490
 491     mr = memory_region_find(sysmem, 0, 1).mr;
 492     if (!mr) {
 493         error_setg(errp, "Failed to find memory region at address 0");
 494         return -1;
 495     }
 496
 497     ram_ptr = memory_region_get_ram_ptr(mr);
 498     if (!ram_ptr) {
 499         error_setg(errp, "No RAM found");
 500         goto unref_mr;
 501     }
 502
 503     netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
 504     if (netboot_filename == NULL) {
 505         error_setg(errp, "Could not find network bootloader '%s'",
 506                    ipl->netboot_fw);
 507         goto unref_mr;
 508     }
 509
 510     img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
 511                             &ipl->start_addr,
 512                             NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL,
 513                             false);
 514
 515     if (img_size < 0) {
 516         img_size = load_image_size(netboot_filename, ram_ptr, ms->ram_size);
 517         ipl->start_addr = KERN_IMAGE_START;
 518     }
 519
 520     if (img_size < 0) {
 521         error_setg(errp, "Failed to load network bootloader");
 522     }
 523
 524     g_free(netboot_filename);
 525
 526 unref_mr:
 527     memory_region_unref(mr);
 528     return img_size;
 529 }
 530
 531 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
 532                                          int virtio_id)
 533 {
 534     uint8_t cssid;
 535     uint8_t ssid;
 536     uint16_t devno;
 537     uint16_t schid;
 538     SubchDev *sch = NULL;
 539
 540     if (iplb->pbt != S390_IPL_TYPE_CCW) {
 541         return false;
 542     }
 543
 544     devno = be16_to_cpu(iplb->ccw.devno);
 545     ssid = iplb->ccw.ssid & 3;
 546
 547     for (schid = 0; schid < MAX_SCHID; schid++) {
 548         for (cssid = 0; cssid < MAX_CSSID; cssid++) {
 549             sch = css_find_subch(1, cssid, ssid, schid);
 550
 551             if (sch && sch->devno == devno) {
 552                 return sch->id.cu_model == virtio_id;
 553             }
 554         }
 555     }
 556     return false;
 557 }
 558
 559 static bool is_virtio_net_device(IplParameterBlock *iplb)
 560 {
 561     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
 562 }
 563
 564 static bool is_virtio_scsi_device(IplParameterBlock *iplb)
 565 {
 566     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
 567 }
 568
 569 static void update_machine_ipl_properties(IplParameterBlock *iplb)
 570 {
 571     Object *machine = qdev_get_machine();
 572     Error *err = NULL;
 573
 574     /* Sync loadparm */
 575     if (iplb->flags & DIAG308_FLAGS_LP_VALID) {
 576         uint8_t *ebcdic_loadparm = iplb->loadparm;
 577         char ascii_loadparm[9];
 578         int i;
 579
 580         for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) {
 581             ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]];
 582         }
 583         ascii_loadparm[i] = 0;
 584         object_property_set_str(machine, "loadparm", ascii_loadparm, &err);
 585     } else {
 586         object_property_set_str(machine, "loadparm", "", &err);
 587     }
 588     if (err) {
 589         warn_report_err(err);
 590     }
 591 }
 592
 593 void s390_ipl_update_diag308(IplParameterBlock *iplb)
 594 {
 595     S390IPLState *ipl = get_ipl_device();
 596
 597     /*
 598      * The IPLB set and retrieved by subcodes 8/9 is completely
 599      * separate from the one managed via subcodes 5/6.
 600      */
 601     if (iplb->pbt == S390_IPL_TYPE_PV) {
 602         ipl->iplb_pv = *iplb;
 603         ipl->iplb_valid_pv = true;
 604     } else {
 605         ipl->iplb = *iplb;
 606         ipl->iplb_valid = true;
 607     }
 608     ipl->netboot = is_virtio_net_device(iplb);
 609     update_machine_ipl_properties(iplb);
 610 }
 611
 612 IplParameterBlock *s390_ipl_get_iplb_pv(void)
 613 {
 614     S390IPLState *ipl = get_ipl_device();
 615
 616     if (!ipl->iplb_valid_pv) {
 617         return NULL;
 618     }
 619     return &ipl->iplb_pv;
 620 }
 621
 622 IplParameterBlock *s390_ipl_get_iplb(void)
 623 {
 624     S390IPLState *ipl = get_ipl_device();
 625
 626     if (!ipl->iplb_valid) {
 627         return NULL;
 628     }
 629     return &ipl->iplb;
 630 }
 631
 632 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
 633 {
 634     S390IPLState *ipl = get_ipl_device();
 635
 636     if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
 637         /* use CPU 0 for full resets */
 638         ipl->reset_cpu_index = 0;
 639     } else {
 640         ipl->reset_cpu_index = cs->cpu_index;
 641     }
 642     ipl->reset_type = reset_type;
 643
 644     if (reset_type == S390_RESET_REIPL &&
 645         ipl->iplb_valid &&
 646         !ipl->netboot &&
 647         ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
 648         is_virtio_scsi_device(&ipl->iplb)) {
 649         CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
 650
 651         if (ccw_dev &&
 652             cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
 653             (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
 654             /*
 655              * this is the original boot device's SCSI
 656              * so restore IPL parameter info from it
 657              */
 658             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 659         }
 660     }
 661     if (reset_type == S390_RESET_MODIFIED_CLEAR ||
 662         reset_type == S390_RESET_LOAD_NORMAL ||
 663         reset_type == S390_RESET_PV) {
 664         /* ignore -no-reboot, send no event  */
 665         qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
 666     } else {
 667         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 668     }
 669     /* as this is triggered by a CPU, make sure to exit the loop */
 670     if (tcg_enabled()) {
 671         cpu_loop_exit(cs);
 672     }
 673 }
 674
 675 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
 676 {
 677     S390IPLState *ipl = get_ipl_device();
 678
 679     *cs = qemu_get_cpu(ipl->reset_cpu_index);
 680     if (!*cs) {
 681         /* use any CPU */
 682         *cs = first_cpu;
 683     }
 684     *reset_type = ipl->reset_type;
 685 }
 686
 687 void s390_ipl_clear_reset_request(void)
 688 {
 689     S390IPLState *ipl = get_ipl_device();
 690
 691     ipl->reset_type = S390_RESET_EXTERNAL;
 692     /* use CPU 0 for full resets */
 693     ipl->reset_cpu_index = 0;
 694 }
 695
 696 static void s390_ipl_prepare_qipl(S390CPU *cpu)
 697 {
 698     S390IPLState *ipl = get_ipl_device();
 699     uint8_t *addr;
 700     uint64_t len = 4096;
 701
 702     addr = cpu_physical_memory_map(cpu->env.psa, &len, true);
 703     if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
 704         error_report("Cannot set QEMU IPL parameters");
 705         return;
 706     }
 707     memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
 708     cpu_physical_memory_unmap(addr, len, 1, len);
 709 }
 710
 711 int s390_ipl_prepare_pv_header(void)
 712 {
 713     IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
 714     IPLBlockPV *ipib_pv = &ipib->pv;
 715     void *hdr = g_malloc(ipib_pv->pv_header_len);
 716     int rc;
 717
 718     cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr,
 719                              ipib_pv->pv_header_len);
 720     rc = s390_pv_set_sec_parms((uintptr_t)hdr,
 721                                ipib_pv->pv_header_len);
 722     g_free(hdr);
 723     return rc;
 724 }
 725
 726 int s390_ipl_pv_unpack(void)
 727 {
 728     IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
 729     IPLBlockPV *ipib_pv = &ipib->pv;
 730     int i, rc = 0;
 731
 732     for (i = 0; i < ipib_pv->num_comp; i++) {
 733         rc = s390_pv_unpack(ipib_pv->components[i].addr,
 734                             TARGET_PAGE_ALIGN(ipib_pv->components[i].size),
 735                             ipib_pv->components[i].tweak_pref);
 736         if (rc) {
 737             break;
 738         }
 739     }
 740     return rc;
 741 }
 742
 743 void s390_ipl_prepare_cpu(S390CPU *cpu)
 744 {
 745     S390IPLState *ipl = get_ipl_device();
 746
 747     cpu->env.psw.addr = ipl->start_addr;
 748     cpu->env.psw.mask = IPL_PSW_MASK;
 749
 750     if (!ipl->kernel || ipl->iplb_valid) {
 751         cpu->env.psw.addr = ipl->bios_start_addr;
 752         if (!ipl->iplb_valid) {
 753             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 754         }
 755     }
 756     if (ipl->netboot) {
 757         load_netboot_image(&error_fatal);
 758         ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
 759     }
 760     s390_ipl_set_boot_menu(ipl);
 761     s390_ipl_prepare_qipl(cpu);
 762 }
 763
 764 static void s390_ipl_reset(DeviceState *dev)
 765 {
 766     S390IPLState *ipl = S390_IPL(dev);
 767
 768     if (ipl->reset_type != S390_RESET_REIPL) {
 769         ipl->iplb_valid = false;
 770         memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
 771     }
 772 }
 773
 774 static void s390_ipl_class_init(ObjectClass *klass, void *data)
 775 {
 776     DeviceClass *dc = DEVICE_CLASS(klass);
 777
 778     dc->realize = s390_ipl_realize;
 779     device_class_set_props(dc, s390_ipl_properties);
 780     dc->reset = s390_ipl_reset;
 781     dc->vmsd = &vmstate_ipl;
 782     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 783     /* Reason: Loads the ROMs and thus can only be used one time - internally */
 784     dc->user_creatable = false;
 785 }
 786
 787 static const TypeInfo s390_ipl_info = {
 788     .class_init = s390_ipl_class_init,
 789     .parent = TYPE_DEVICE,
 790     .name  = TYPE_S390_IPL,
 791     .instance_size  = sizeof(S390IPLState),
 792 };
 793
 794 static void s390_ipl_register_types(void)
 795 {
 796     type_register_static(&s390_ipl_info);
 797 }
 798
 799 type_init(s390_ipl_register_types)