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 "hw/scsi/scsi.h"
  31 #include "hw/virtio/virtio-net.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 "standard-headers/linux/virtio_ids.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_SIZE_ADDR        0x010430UL
  43 #define KERN_PARM_AREA                  0x010480UL
  44 #define LEGACY_KERN_PARM_AREA_SIZE      0x000380UL
  45 #define INITRD_START                    0x800000UL
  46 #define INITRD_PARM_START               0x010408UL
  47 #define PARMFILE_START                  0x001000UL
  48 #define ZIPL_IMAGE_START                0x009000UL
  49 #define IPL_PSW_MASK                    (PSW_MASK_32 | PSW_MASK_64)
  50
  51 static bool iplb_extended_needed(void *opaque)
  52 {
  53     S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
  54
  55     return ipl->iplbext_migration;
  56 }
  57
  58 static const VMStateDescription vmstate_iplb_extended = {
  59     .name = "ipl/iplb_extended",
  60     .version_id = 0,
  61     .minimum_version_id = 0,
  62     .needed = iplb_extended_needed,
  63     .fields = (VMStateField[]) {
  64         VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
  65         VMSTATE_END_OF_LIST()
  66     }
  67 };
  68
  69 static const VMStateDescription vmstate_iplb = {
  70     .name = "ipl/iplb",
  71     .version_id = 0,
  72     .minimum_version_id = 0,
  73     .fields = (VMStateField[]) {
  74         VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
  75         VMSTATE_UINT16(devno, IplParameterBlock),
  76         VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
  77         VMSTATE_END_OF_LIST()
  78     },
  79     .subsections = (const VMStateDescription*[]) {
  80         &vmstate_iplb_extended,
  81         NULL
  82     }
  83 };
  84
  85 static const VMStateDescription vmstate_ipl = {
  86     .name = "ipl",
  87     .version_id = 0,
  88     .minimum_version_id = 0,
  89     .fields = (VMStateField[]) {
  90         VMSTATE_UINT64(compat_start_addr, S390IPLState),
  91         VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
  92         VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
  93         VMSTATE_BOOL(iplb_valid, S390IPLState),
  94         VMSTATE_UINT8(cssid, S390IPLState),
  95         VMSTATE_UINT8(ssid, S390IPLState),
  96         VMSTATE_UINT16(devno, S390IPLState),
  97         VMSTATE_END_OF_LIST()
  98      }
  99 };
 100
 101 static S390IPLState *get_ipl_device(void)
 102 {
 103     return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
 104 }
 105
 106 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
 107 {
 108     uint64_t dstaddr = *(uint64_t *) opaque;
 109     /*
 110      * Assuming that our s390-ccw.img was linked for starting at address 0,
 111      * we can simply add the destination address for the final location
 112      */
 113     return srcaddr + dstaddr;
 114 }
 115
 116 static uint64_t get_max_kernel_cmdline_size(void)
 117 {
 118     uint64_t *size_ptr = rom_ptr(KERN_PARM_AREA_SIZE_ADDR, sizeof(*size_ptr));
 119
 120     if (size_ptr) {
 121         uint64_t size;
 122
 123         size = be64_to_cpu(*size_ptr);
 124         if (size) {
 125             return size;
 126         }
 127     }
 128     return LEGACY_KERN_PARM_AREA_SIZE;
 129 }
 130
 131 static void s390_ipl_realize(DeviceState *dev, Error **errp)
 132 {
 133     MachineState *ms = MACHINE(qdev_get_machine());
 134     S390IPLState *ipl = S390_IPL(dev);
 135     uint32_t *ipl_psw;
 136     uint64_t pentry;
 137     char *magic;
 138     int kernel_size;
 139
 140     int bios_size;
 141     char *bios_filename;
 142
 143     /*
 144      * Always load the bios if it was enforced,
 145      * even if an external kernel has been defined.
 146      */
 147     if (!ipl->kernel || ipl->enforce_bios) {
 148         uint64_t fwbase = (MIN(ms->ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
 149
 150         bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->firmware);
 151         if (bios_filename == NULL) {
 152             error_setg(errp, "could not find stage1 bootloader");
 153             return;
 154         }
 155
 156         bios_size = load_elf(bios_filename, NULL,
 157                              bios_translate_addr, &fwbase,
 158                              &ipl->bios_start_addr, NULL, NULL, NULL, 1,
 159                              EM_S390, 0, 0);
 160         if (bios_size > 0) {
 161             /* Adjust ELF start address to final location */
 162             ipl->bios_start_addr += fwbase;
 163         } else {
 164             /* Try to load non-ELF file */
 165             bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
 166                                             4096);
 167             ipl->bios_start_addr = ZIPL_IMAGE_START;
 168         }
 169         g_free(bios_filename);
 170
 171         if (bios_size == -1) {
 172             error_setg(errp, "could not load bootloader '%s'", ipl->firmware);
 173             return;
 174         }
 175
 176         /* default boot target is the bios */
 177         ipl->start_addr = ipl->bios_start_addr;
 178     }
 179
 180     if (ipl->kernel) {
 181         kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL,
 182                                &pentry, NULL,
 183                                NULL, NULL, 1, EM_S390, 0, 0);
 184         if (kernel_size < 0) {
 185             kernel_size = load_image_targphys(ipl->kernel, 0, ms->ram_size);
 186             if (kernel_size < 0) {
 187                 error_setg(errp, "could not load kernel '%s'", ipl->kernel);
 188                 return;
 189             }
 190             /* if this is Linux use KERN_IMAGE_START */
 191             magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
 192             if (magic && !memcmp(magic, "S390EP", 6)) {
 193                 pentry = KERN_IMAGE_START;
 194             } else {
 195                 /* if not Linux load the address of the (short) IPL PSW */
 196                 ipl_psw = rom_ptr(4, 4);
 197                 if (ipl_psw) {
 198                     pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR;
 199                 } else {
 200                     error_setg(errp, "Could not get IPL PSW");
 201                     return;
 202                 }
 203             }
 204         }
 205         /*
 206          * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
 207          * kernel parameters here as well. Note: For old kernels (up to 3.2)
 208          * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
 209          * loader) and it won't work. For this case we force it to 0x10000, too.
 210          */
 211         if (pentry == KERN_IMAGE_START || pentry == 0x800) {
 212             size_t cmdline_size = strlen(ipl->cmdline) + 1;
 213             char *parm_area = rom_ptr(KERN_PARM_AREA, cmdline_size);
 214
 215             ipl->start_addr = KERN_IMAGE_START;
 216             /* Overwrite parameters in the kernel image, which are "rom" */
 217             if (parm_area) {
 218                 uint64_t max_cmdline_size = get_max_kernel_cmdline_size();
 219
 220                 if (cmdline_size > max_cmdline_size) {
 221                     error_setg(errp,
 222                                "kernel command line exceeds maximum size:"
 223                                " %zu > %" PRIu64,
 224                                cmdline_size, max_cmdline_size);
 225                     return;
 226                 }
 227
 228                 strcpy(parm_area, ipl->cmdline);
 229             }
 230         } else {
 231             ipl->start_addr = pentry;
 232         }
 233
 234         if (ipl->initrd) {
 235             ram_addr_t initrd_offset;
 236             int initrd_size;
 237             uint64_t *romptr;
 238
 239             initrd_offset = INITRD_START;
 240             while (kernel_size + 0x100000 > initrd_offset) {
 241                 initrd_offset += 0x100000;
 242             }
 243             initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
 244                                               ms->ram_size - initrd_offset);
 245             if (initrd_size == -1) {
 246                 error_setg(errp, "could not load initrd '%s'", ipl->initrd);
 247                 return;
 248             }
 249
 250             /*
 251              * we have to overwrite values in the kernel image,
 252              * which are "rom"
 253              */
 254             romptr = rom_ptr(INITRD_PARM_START, 16);
 255             if (romptr) {
 256                 stq_p(romptr, initrd_offset);
 257                 stq_p(romptr + 1, initrd_size);
 258             }
 259         }
 260     }
 261     /*
 262      * Don't ever use the migrated values, they could come from a different
 263      * BIOS and therefore don't work. But still migrate the values, so
 264      * QEMUs relying on it don't break.
 265      */
 266     ipl->compat_start_addr = ipl->start_addr;
 267     ipl->compat_bios_start_addr = ipl->bios_start_addr;
 268     /*
 269      * Because this Device is not on any bus in the qbus tree (it is
 270      * not a sysbus device and it's not on some other bus like a PCI
 271      * bus) it will not be automatically reset by the 'reset the
 272      * sysbus' hook registered by vl.c like most devices. So we must
 273      * manually register a reset hook for it.
 274      * TODO: there should be a better way to do this.
 275      */
 276     qemu_register_reset(resettable_cold_reset_fn, dev);
 277 }
 278
 279 static Property s390_ipl_properties[] = {
 280     DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
 281     DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
 282     DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
 283     DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
 284     DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
 285     DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
 286     DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
 287                      true),
 288     DEFINE_PROP_END_OF_LIST(),
 289 };
 290
 291 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
 292 {
 293     unsigned long splash_time = 0;
 294
 295     if (!get_boot_device(0)) {
 296         if (current_machine->boot_config.has_menu && current_machine->boot_config.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 (!current_machine->boot_config.has_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 (current_machine->boot_config.has_menu && current_machine->boot_config.menu) {
 315             error_report("boot menu is not supported for this device type");
 316         }
 317         return;
 318     }
 319
 320     if (!current_machine->boot_config.has_menu || !current_machine->boot_config.menu) {
 321         return;
 322     }
 323
 324     ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
 325
 326     if (current_machine->boot_config.has_splash_time) {
 327         splash_time = current_machine->boot_config.splash_time;
 328     }
 329     if (splash_time > 0xffffffff) {
 330         error_report("splash-time is too large, forcing it to max value");
 331         ipl->qipl.boot_menu_timeout = 0xffffffff;
 332         return;
 333     }
 334
 335     ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
 336 }
 337
 338 #define CCW_DEVTYPE_NONE        0x00
 339 #define CCW_DEVTYPE_VIRTIO      0x01
 340 #define CCW_DEVTYPE_VIRTIO_NET  0x02
 341 #define CCW_DEVTYPE_SCSI        0x03
 342 #define CCW_DEVTYPE_VFIO        0x04
 343
 344 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
 345 {
 346     CcwDevice *ccw_dev = NULL;
 347     int tmp_dt = CCW_DEVTYPE_NONE;
 348
 349     if (dev_st) {
 350         VirtIONet *virtio_net_dev = (VirtIONet *)
 351             object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
 352         VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
 353             object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
 354                                 TYPE_VIRTIO_CCW_DEVICE);
 355         VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
 356             object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
 357
 358         if (virtio_ccw_dev) {
 359             ccw_dev = CCW_DEVICE(virtio_ccw_dev);
 360             if (virtio_net_dev) {
 361                 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
 362             } else {
 363                 tmp_dt = CCW_DEVTYPE_VIRTIO;
 364             }
 365         } else if (vfio_ccw_dev) {
 366             ccw_dev = CCW_DEVICE(vfio_ccw_dev);
 367             tmp_dt = CCW_DEVTYPE_VFIO;
 368         } else {
 369             SCSIDevice *sd = (SCSIDevice *)
 370                 object_dynamic_cast(OBJECT(dev_st),
 371                                     TYPE_SCSI_DEVICE);
 372             if (sd) {
 373                 SCSIBus *sbus = scsi_bus_from_device(sd);
 374                 VirtIODevice *vdev = (VirtIODevice *)
 375                     object_dynamic_cast(OBJECT(sbus->qbus.parent),
 376                                         TYPE_VIRTIO_DEVICE);
 377                 if (vdev) {
 378                     ccw_dev = (CcwDevice *)
 379                         object_dynamic_cast(OBJECT(qdev_get_parent_bus(DEVICE(vdev))->parent),
 380                                             TYPE_CCW_DEVICE);
 381                     if (ccw_dev) {
 382                         tmp_dt = CCW_DEVTYPE_SCSI;
 383                     }
 384                 }
 385             }
 386         }
 387     }
 388     if (devtype) {
 389         *devtype = tmp_dt;
 390     }
 391     return ccw_dev;
 392 }
 393
 394 static bool s390_gen_initial_iplb(S390IPLState *ipl)
 395 {
 396     DeviceState *dev_st;
 397     CcwDevice *ccw_dev = NULL;
 398     SCSIDevice *sd;
 399     int devtype;
 400
 401     dev_st = get_boot_device(0);
 402     if (dev_st) {
 403         ccw_dev = s390_get_ccw_device(dev_st, &devtype);
 404     }
 405
 406     /*
 407      * Currently allow IPL only from CCW devices.
 408      */
 409     if (ccw_dev) {
 410         switch (devtype) {
 411         case CCW_DEVTYPE_SCSI:
 412             sd = SCSI_DEVICE(dev_st);
 413             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
 414             ipl->iplb.blk0_len =
 415                 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
 416             ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
 417             ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
 418             ipl->iplb.scsi.target = cpu_to_be16(sd->id);
 419             ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
 420             ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
 421             ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
 422             break;
 423         case CCW_DEVTYPE_VFIO:
 424             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 425             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 426             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 427             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 428             break;
 429         case CCW_DEVTYPE_VIRTIO_NET:
 430             ipl->netboot = true;
 431             /* Fall through to CCW_DEVTYPE_VIRTIO case */
 432         case CCW_DEVTYPE_VIRTIO:
 433             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 434             ipl->iplb.blk0_len =
 435                 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
 436             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 437             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 438             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 439             break;
 440         }
 441
 442         if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
 443             ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
 444         }
 445
 446         return true;
 447     }
 448
 449     return false;
 450 }
 451
 452 int s390_ipl_set_loadparm(uint8_t *loadparm)
 453 {
 454     MachineState *machine = MACHINE(qdev_get_machine());
 455     char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
 456
 457     if (lp) {
 458         int i;
 459
 460         /* lp is an uppercase string without leading/embedded spaces */
 461         for (i = 0; i < 8 && lp[i]; i++) {
 462             loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
 463         }
 464
 465         if (i < 8) {
 466             memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
 467         }
 468
 469         g_free(lp);
 470         return 0;
 471     }
 472
 473     return -1;
 474 }
 475
 476 static int load_netboot_image(Error **errp)
 477 {
 478     MachineState *ms = MACHINE(qdev_get_machine());
 479     S390IPLState *ipl = get_ipl_device();
 480     char *netboot_filename;
 481     MemoryRegion *sysmem =  get_system_memory();
 482     MemoryRegion *mr = NULL;
 483     void *ram_ptr = NULL;
 484     int img_size = -1;
 485
 486     mr = memory_region_find(sysmem, 0, 1).mr;
 487     if (!mr) {
 488         error_setg(errp, "Failed to find memory region at address 0");
 489         return -1;
 490     }
 491
 492     ram_ptr = memory_region_get_ram_ptr(mr);
 493     if (!ram_ptr) {
 494         error_setg(errp, "No RAM found");
 495         goto unref_mr;
 496     }
 497
 498     netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
 499     if (netboot_filename == NULL) {
 500         error_setg(errp, "Could not find network bootloader '%s'",
 501                    ipl->netboot_fw);
 502         goto unref_mr;
 503     }
 504
 505     img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
 506                             &ipl->start_addr,
 507                             NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL,
 508                             false);
 509
 510     if (img_size < 0) {
 511         img_size = load_image_size(netboot_filename, ram_ptr, ms->ram_size);
 512         ipl->start_addr = KERN_IMAGE_START;
 513     }
 514
 515     if (img_size < 0) {
 516         error_setg(errp, "Failed to load network bootloader");
 517     }
 518
 519     g_free(netboot_filename);
 520
 521 unref_mr:
 522     memory_region_unref(mr);
 523     return img_size;
 524 }
 525
 526 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
 527                                          int virtio_id)
 528 {
 529     uint8_t cssid;
 530     uint8_t ssid;
 531     uint16_t devno;
 532     uint16_t schid;
 533     SubchDev *sch = NULL;
 534
 535     if (iplb->pbt != S390_IPL_TYPE_CCW) {
 536         return false;
 537     }
 538
 539     devno = be16_to_cpu(iplb->ccw.devno);
 540     ssid = iplb->ccw.ssid & 3;
 541
 542     for (schid = 0; schid < MAX_SCHID; schid++) {
 543         for (cssid = 0; cssid < MAX_CSSID; cssid++) {
 544             sch = css_find_subch(1, cssid, ssid, schid);
 545
 546             if (sch && sch->devno == devno) {
 547                 return sch->id.cu_model == virtio_id;
 548             }
 549         }
 550     }
 551     return false;
 552 }
 553
 554 static bool is_virtio_net_device(IplParameterBlock *iplb)
 555 {
 556     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
 557 }
 558
 559 static bool is_virtio_scsi_device(IplParameterBlock *iplb)
 560 {
 561     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
 562 }
 563
 564 static void update_machine_ipl_properties(IplParameterBlock *iplb)
 565 {
 566     Object *machine = qdev_get_machine();
 567     Error *err = NULL;
 568
 569     /* Sync loadparm */
 570     if (iplb->flags & DIAG308_FLAGS_LP_VALID) {
 571         uint8_t *ebcdic_loadparm = iplb->loadparm;
 572         char ascii_loadparm[9];
 573         int i;
 574
 575         for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) {
 576             ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]];
 577         }
 578         ascii_loadparm[i] = 0;
 579         object_property_set_str(machine, "loadparm", ascii_loadparm, &err);
 580     } else {
 581         object_property_set_str(machine, "loadparm", "", &err);
 582     }
 583     if (err) {
 584         warn_report_err(err);
 585     }
 586 }
 587
 588 void s390_ipl_update_diag308(IplParameterBlock *iplb)
 589 {
 590     S390IPLState *ipl = get_ipl_device();
 591
 592     /*
 593      * The IPLB set and retrieved by subcodes 8/9 is completely
 594      * separate from the one managed via subcodes 5/6.
 595      */
 596     if (iplb->pbt == S390_IPL_TYPE_PV) {
 597         ipl->iplb_pv = *iplb;
 598         ipl->iplb_valid_pv = true;
 599     } else {
 600         ipl->iplb = *iplb;
 601         ipl->iplb_valid = true;
 602     }
 603     ipl->netboot = is_virtio_net_device(iplb);
 604     update_machine_ipl_properties(iplb);
 605 }
 606
 607 IplParameterBlock *s390_ipl_get_iplb_pv(void)
 608 {
 609     S390IPLState *ipl = get_ipl_device();
 610
 611     if (!ipl->iplb_valid_pv) {
 612         return NULL;
 613     }
 614     return &ipl->iplb_pv;
 615 }
 616
 617 IplParameterBlock *s390_ipl_get_iplb(void)
 618 {
 619     S390IPLState *ipl = get_ipl_device();
 620
 621     if (!ipl->iplb_valid) {
 622         return NULL;
 623     }
 624     return &ipl->iplb;
 625 }
 626
 627 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
 628 {
 629     S390IPLState *ipl = get_ipl_device();
 630
 631     if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
 632         /* use CPU 0 for full resets */
 633         ipl->reset_cpu_index = 0;
 634     } else {
 635         ipl->reset_cpu_index = cs->cpu_index;
 636     }
 637     ipl->reset_type = reset_type;
 638
 639     if (reset_type == S390_RESET_REIPL &&
 640         ipl->iplb_valid &&
 641         !ipl->netboot &&
 642         ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
 643         is_virtio_scsi_device(&ipl->iplb)) {
 644         CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
 645
 646         if (ccw_dev &&
 647             cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
 648             (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
 649             /*
 650              * this is the original boot device's SCSI
 651              * so restore IPL parameter info from it
 652              */
 653             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 654         }
 655     }
 656     if (reset_type == S390_RESET_MODIFIED_CLEAR ||
 657         reset_type == S390_RESET_LOAD_NORMAL ||
 658         reset_type == S390_RESET_PV) {
 659         /* ignore -no-reboot, send no event  */
 660         qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
 661     } else {
 662         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 663     }
 664     /* as this is triggered by a CPU, make sure to exit the loop */
 665     if (tcg_enabled()) {
 666         cpu_loop_exit(cs);
 667     }
 668 }
 669
 670 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
 671 {
 672     S390IPLState *ipl = get_ipl_device();
 673
 674     *cs = qemu_get_cpu(ipl->reset_cpu_index);
 675     if (!*cs) {
 676         /* use any CPU */
 677         *cs = first_cpu;
 678     }
 679     *reset_type = ipl->reset_type;
 680 }
 681
 682 void s390_ipl_clear_reset_request(void)
 683 {
 684     S390IPLState *ipl = get_ipl_device();
 685
 686     ipl->reset_type = S390_RESET_EXTERNAL;
 687     /* use CPU 0 for full resets */
 688     ipl->reset_cpu_index = 0;
 689 }
 690
 691 static void s390_ipl_prepare_qipl(S390CPU *cpu)
 692 {
 693     S390IPLState *ipl = get_ipl_device();
 694     uint8_t *addr;
 695     uint64_t len = 4096;
 696
 697     addr = cpu_physical_memory_map(cpu->env.psa, &len, true);
 698     if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
 699         error_report("Cannot set QEMU IPL parameters");
 700         return;
 701     }
 702     memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
 703     cpu_physical_memory_unmap(addr, len, 1, len);
 704 }
 705
 706 int s390_ipl_prepare_pv_header(void)
 707 {
 708     IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
 709     IPLBlockPV *ipib_pv = &ipib->pv;
 710     void *hdr = g_malloc(ipib_pv->pv_header_len);
 711     int rc;
 712
 713     cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr,
 714                              ipib_pv->pv_header_len);
 715     rc = s390_pv_set_sec_parms((uintptr_t)hdr,
 716                                ipib_pv->pv_header_len);
 717     g_free(hdr);
 718     return rc;
 719 }
 720
 721 int s390_ipl_pv_unpack(void)
 722 {
 723     IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
 724     IPLBlockPV *ipib_pv = &ipib->pv;
 725     int i, rc = 0;
 726
 727     for (i = 0; i < ipib_pv->num_comp; i++) {
 728         rc = s390_pv_unpack(ipib_pv->components[i].addr,
 729                             TARGET_PAGE_ALIGN(ipib_pv->components[i].size),
 730                             ipib_pv->components[i].tweak_pref);
 731         if (rc) {
 732             break;
 733         }
 734     }
 735     return rc;
 736 }
 737
 738 void s390_ipl_prepare_cpu(S390CPU *cpu)
 739 {
 740     S390IPLState *ipl = get_ipl_device();
 741
 742     cpu->env.psw.addr = ipl->start_addr;
 743     cpu->env.psw.mask = IPL_PSW_MASK;
 744
 745     if (!ipl->kernel || ipl->iplb_valid) {
 746         cpu->env.psw.addr = ipl->bios_start_addr;
 747         if (!ipl->iplb_valid) {
 748             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 749         }
 750     }
 751     if (ipl->netboot) {
 752         load_netboot_image(&error_fatal);
 753         ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
 754     }
 755     s390_ipl_set_boot_menu(ipl);
 756     s390_ipl_prepare_qipl(cpu);
 757 }
 758
 759 static void s390_ipl_reset(DeviceState *dev)
 760 {
 761     S390IPLState *ipl = S390_IPL(dev);
 762
 763     if (ipl->reset_type != S390_RESET_REIPL) {
 764         ipl->iplb_valid = false;
 765         memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
 766     }
 767 }
 768
 769 static void s390_ipl_class_init(ObjectClass *klass, void *data)
 770 {
 771     DeviceClass *dc = DEVICE_CLASS(klass);
 772
 773     dc->realize = s390_ipl_realize;
 774     device_class_set_props(dc, s390_ipl_properties);
 775     dc->reset = s390_ipl_reset;
 776     dc->vmsd = &vmstate_ipl;
 777     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 778     /* Reason: Loads the ROMs and thus can only be used one time - internally */
 779     dc->user_creatable = false;
 780 }
 781
 782 static const TypeInfo s390_ipl_info = {
 783     .class_init = s390_ipl_class_init,
 784     .parent = TYPE_DEVICE,
 785     .name  = TYPE_S390_IPL,
 786     .instance_size  = sizeof(S390IPLState),
 787 };
 788
 789 static void s390_ipl_register_types(void)
 790 {
 791     type_register_static(&s390_ipl_info);
 792 }
 793
 794 type_init(s390_ipl_register_types)