hw/s390x/ipl.c

   1 /*
   2  * bootloader support
   3  *
   4  * Copyright IBM, Corp. 2012, 2020
   5  *
   6  * Authors:
   7  *  Christian Borntraeger <borntraeger@de.ibm.com>
   8  *  Janosch Frank <frankja@linux.ibm.com>
   9  *
  10  * This work is licensed under the terms of the GNU GPL, version 2 or (at your
  11  * option) any later version.  See the COPYING file in the top-level directory.
  12  *
  13  */
  14
  15 #include "qemu/osdep.h"
  16 #include "qemu-common.h"
  17 #include "qemu/datadir.h"
  18 #include "qapi/error.h"
  19 #include "sysemu/reset.h"
  20 #include "sysemu/runstate.h"
  21 #include "sysemu/tcg.h"
  22 #include "elf.h"
  23 #include "hw/loader.h"
  24 #include "hw/qdev-properties.h"
  25 #include "hw/boards.h"
  26 #include "hw/s390x/virtio-ccw.h"
  27 #include "hw/s390x/vfio-ccw.h"
  28 #include "hw/s390x/css.h"
  29 #include "hw/s390x/ebcdic.h"
  30 #include "hw/s390x/pv.h"
  31 #include "ipl.h"
  32 #include "qemu/error-report.h"
  33 #include "qemu/config-file.h"
  34 #include "qemu/cutils.h"
  35 #include "qemu/option.h"
  36 #include "exec/exec-all.h"
  37
  38 #define KERN_IMAGE_START                0x010000UL
  39 #define LINUX_MAGIC_ADDR                0x010008UL
  40 #define KERN_PARM_AREA                  0x010480UL
  41 #define INITRD_START                    0x800000UL
  42 #define INITRD_PARM_START               0x010408UL
  43 #define PARMFILE_START                  0x001000UL
  44 #define ZIPL_IMAGE_START                0x009000UL
  45 #define IPL_PSW_MASK                    (PSW_MASK_32 | PSW_MASK_64)
  46
  47 static bool iplb_extended_needed(void *opaque)
  48 {
  49     S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
  50
  51     return ipl->iplbext_migration;
  52 }
  53
  54 static const VMStateDescription vmstate_iplb_extended = {
  55     .name = "ipl/iplb_extended",
  56     .version_id = 0,
  57     .minimum_version_id = 0,
  58     .needed = iplb_extended_needed,
  59     .fields = (VMStateField[]) {
  60         VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
  61         VMSTATE_END_OF_LIST()
  62     }
  63 };
  64
  65 static const VMStateDescription vmstate_iplb = {
  66     .name = "ipl/iplb",
  67     .version_id = 0,
  68     .minimum_version_id = 0,
  69     .fields = (VMStateField[]) {
  70         VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
  71         VMSTATE_UINT16(devno, IplParameterBlock),
  72         VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
  73         VMSTATE_END_OF_LIST()
  74     },
  75     .subsections = (const VMStateDescription*[]) {
  76         &vmstate_iplb_extended,
  77         NULL
  78     }
  79 };
  80
  81 static const VMStateDescription vmstate_ipl = {
  82     .name = "ipl",
  83     .version_id = 0,
  84     .minimum_version_id = 0,
  85     .fields = (VMStateField[]) {
  86         VMSTATE_UINT64(compat_start_addr, S390IPLState),
  87         VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
  88         VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
  89         VMSTATE_BOOL(iplb_valid, S390IPLState),
  90         VMSTATE_UINT8(cssid, S390IPLState),
  91         VMSTATE_UINT8(ssid, S390IPLState),
  92         VMSTATE_UINT16(devno, S390IPLState),
  93         VMSTATE_END_OF_LIST()
  94      }
  95 };
  96
  97 static S390IPLState *get_ipl_device(void)
  98 {
  99     return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
 100 }
 101
 102 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
 103 {
 104     uint64_t dstaddr = *(uint64_t *) opaque;
 105     /*
 106      * Assuming that our s390-ccw.img was linked for starting at address 0,
 107      * we can simply add the destination address for the final location
 108      */
 109     return srcaddr + dstaddr;
 110 }
 111
 112 static void s390_ipl_realize(DeviceState *dev, Error **errp)
 113 {
 114     MachineState *ms = MACHINE(qdev_get_machine());
 115     S390IPLState *ipl = S390_IPL(dev);
 116     uint32_t *ipl_psw;
 117     uint64_t pentry;
 118     char *magic;
 119     int kernel_size;
 120
 121     int bios_size;
 122     char *bios_filename;
 123
 124     /*
 125      * Always load the bios if it was enforced,
 126      * even if an external kernel has been defined.
 127      */
 128     if (!ipl->kernel || ipl->enforce_bios) {
 129         uint64_t fwbase = (MIN(ms->ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
 130
 131         bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->firmware);
 132         if (bios_filename == NULL) {
 133             error_setg(errp, "could not find stage1 bootloader");
 134             return;
 135         }
 136
 137         bios_size = load_elf(bios_filename, NULL,
 138                              bios_translate_addr, &fwbase,
 139                              &ipl->bios_start_addr, NULL, NULL, NULL, 1,
 140                              EM_S390, 0, 0);
 141         if (bios_size > 0) {
 142             /* Adjust ELF start address to final location */
 143             ipl->bios_start_addr += fwbase;
 144         } else {
 145             /* Try to load non-ELF file */
 146             bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
 147                                             4096);
 148             ipl->bios_start_addr = ZIPL_IMAGE_START;
 149         }
 150         g_free(bios_filename);
 151
 152         if (bios_size == -1) {
 153             error_setg(errp, "could not load bootloader '%s'", ipl->firmware);
 154             return;
 155         }
 156
 157         /* default boot target is the bios */
 158         ipl->start_addr = ipl->bios_start_addr;
 159     }
 160
 161     if (ipl->kernel) {
 162         kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL,
 163                                &pentry, NULL,
 164                                NULL, NULL, 1, EM_S390, 0, 0);
 165         if (kernel_size < 0) {
 166             kernel_size = load_image_targphys(ipl->kernel, 0, ms->ram_size);
 167             if (kernel_size < 0) {
 168                 error_setg(errp, "could not load kernel '%s'", ipl->kernel);
 169                 return;
 170             }
 171             /* if this is Linux use KERN_IMAGE_START */
 172             magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
 173             if (magic && !memcmp(magic, "S390EP", 6)) {
 174                 pentry = KERN_IMAGE_START;
 175             } else {
 176                 /* if not Linux load the address of the (short) IPL PSW */
 177                 ipl_psw = rom_ptr(4, 4);
 178                 if (ipl_psw) {
 179                     pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR;
 180                 } else {
 181                     error_setg(errp, "Could not get IPL PSW");
 182                     return;
 183                 }
 184             }
 185         }
 186         /*
 187          * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
 188          * kernel parameters here as well. Note: For old kernels (up to 3.2)
 189          * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
 190          * loader) and it won't work. For this case we force it to 0x10000, too.
 191          */
 192         if (pentry == KERN_IMAGE_START || pentry == 0x800) {
 193             char *parm_area = rom_ptr(KERN_PARM_AREA, strlen(ipl->cmdline) + 1);
 194             ipl->start_addr = KERN_IMAGE_START;
 195             /* Overwrite parameters in the kernel image, which are "rom" */
 196             if (parm_area) {
 197                 strcpy(parm_area, ipl->cmdline);
 198             }
 199         } else {
 200             ipl->start_addr = pentry;
 201         }
 202
 203         if (ipl->initrd) {
 204             ram_addr_t initrd_offset;
 205             int initrd_size;
 206             uint64_t *romptr;
 207
 208             initrd_offset = INITRD_START;
 209             while (kernel_size + 0x100000 > initrd_offset) {
 210                 initrd_offset += 0x100000;
 211             }
 212             initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
 213                                               ms->ram_size - initrd_offset);
 214             if (initrd_size == -1) {
 215                 error_setg(errp, "could not load initrd '%s'", ipl->initrd);
 216                 return;
 217             }
 218
 219             /*
 220              * we have to overwrite values in the kernel image,
 221              * which are "rom"
 222              */
 223             romptr = rom_ptr(INITRD_PARM_START, 16);
 224             if (romptr) {
 225                 stq_p(romptr, initrd_offset);
 226                 stq_p(romptr + 1, initrd_size);
 227             }
 228         }
 229     }
 230     /*
 231      * Don't ever use the migrated values, they could come from a different
 232      * BIOS and therefore don't work. But still migrate the values, so
 233      * QEMUs relying on it don't break.
 234      */
 235     ipl->compat_start_addr = ipl->start_addr;
 236     ipl->compat_bios_start_addr = ipl->bios_start_addr;
 237     /*
 238      * Because this Device is not on any bus in the qbus tree (it is
 239      * not a sysbus device and it's not on some other bus like a PCI
 240      * bus) it will not be automatically reset by the 'reset the
 241      * sysbus' hook registered by vl.c like most devices. So we must
 242      * manually register a reset hook for it.
 243      * TODO: there should be a better way to do this.
 244      */
 245     qemu_register_reset(resettable_cold_reset_fn, dev);
 246 }
 247
 248 static Property s390_ipl_properties[] = {
 249     DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
 250     DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
 251     DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
 252     DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
 253     DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
 254     DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
 255     DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
 256                      true),
 257     DEFINE_PROP_END_OF_LIST(),
 258 };
 259
 260 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
 261 {
 262     QemuOptsList *plist = qemu_find_opts("boot-opts");
 263     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 264     const char *tmp;
 265     unsigned long splash_time = 0;
 266
 267     if (!get_boot_device(0)) {
 268         if (boot_menu) {
 269             error_report("boot menu requires a bootindex to be specified for "
 270                          "the IPL device");
 271         }
 272         return;
 273     }
 274
 275     switch (ipl->iplb.pbt) {
 276     case S390_IPL_TYPE_CCW:
 277         /* In the absence of -boot menu, use zipl parameters */
 278         if (!qemu_opt_get(opts, "menu")) {
 279             ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
 280             return;
 281         }
 282         break;
 283     case S390_IPL_TYPE_QEMU_SCSI:
 284         break;
 285     default:
 286         if (boot_menu) {
 287             error_report("boot menu is not supported for this device type");
 288         }
 289         return;
 290     }
 291
 292     if (!boot_menu) {
 293         return;
 294     }
 295
 296     ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
 297
 298     tmp = qemu_opt_get(opts, "splash-time");
 299
 300     if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
 301         error_report("splash-time is invalid, forcing it to 0");
 302         ipl->qipl.boot_menu_timeout = 0;
 303         return;
 304     }
 305
 306     if (splash_time > 0xffffffff) {
 307         error_report("splash-time is too large, forcing it to max value");
 308         ipl->qipl.boot_menu_timeout = 0xffffffff;
 309         return;
 310     }
 311
 312     ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
 313 }
 314
 315 #define CCW_DEVTYPE_NONE        0x00
 316 #define CCW_DEVTYPE_VIRTIO      0x01
 317 #define CCW_DEVTYPE_VIRTIO_NET  0x02
 318 #define CCW_DEVTYPE_SCSI        0x03
 319 #define CCW_DEVTYPE_VFIO        0x04
 320
 321 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
 322 {
 323     CcwDevice *ccw_dev = NULL;
 324     int tmp_dt = CCW_DEVTYPE_NONE;
 325
 326     if (dev_st) {
 327         VirtIONet *virtio_net_dev = (VirtIONet *)
 328             object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
 329         VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
 330             object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
 331                                 TYPE_VIRTIO_CCW_DEVICE);
 332         VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
 333             object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
 334
 335         if (virtio_ccw_dev) {
 336             ccw_dev = CCW_DEVICE(virtio_ccw_dev);
 337             if (virtio_net_dev) {
 338                 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
 339             } else {
 340                 tmp_dt = CCW_DEVTYPE_VIRTIO;
 341             }
 342         } else if (vfio_ccw_dev) {
 343             ccw_dev = CCW_DEVICE(vfio_ccw_dev);
 344             tmp_dt = CCW_DEVTYPE_VFIO;
 345         } else {
 346             SCSIDevice *sd = (SCSIDevice *)
 347                 object_dynamic_cast(OBJECT(dev_st),
 348                                     TYPE_SCSI_DEVICE);
 349             if (sd) {
 350                 SCSIBus *bus = scsi_bus_from_device(sd);
 351                 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
 352                 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
 353                                                        vdev);
 354
 355                 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
 356                                                            TYPE_CCW_DEVICE);
 357                 tmp_dt = CCW_DEVTYPE_SCSI;
 358             }
 359         }
 360     }
 361     if (devtype) {
 362         *devtype = tmp_dt;
 363     }
 364     return ccw_dev;
 365 }
 366
 367 static bool s390_gen_initial_iplb(S390IPLState *ipl)
 368 {
 369     DeviceState *dev_st;
 370     CcwDevice *ccw_dev = NULL;
 371     SCSIDevice *sd;
 372     int devtype;
 373
 374     dev_st = get_boot_device(0);
 375     if (dev_st) {
 376         ccw_dev = s390_get_ccw_device(dev_st, &devtype);
 377     }
 378
 379     /*
 380      * Currently allow IPL only from CCW devices.
 381      */
 382     if (ccw_dev) {
 383         switch (devtype) {
 384         case CCW_DEVTYPE_SCSI:
 385             sd = SCSI_DEVICE(dev_st);
 386             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
 387             ipl->iplb.blk0_len =
 388                 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
 389             ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
 390             ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
 391             ipl->iplb.scsi.target = cpu_to_be16(sd->id);
 392             ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
 393             ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
 394             ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
 395             break;
 396         case CCW_DEVTYPE_VFIO:
 397             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 398             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 399             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 400             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 401             break;
 402         case CCW_DEVTYPE_VIRTIO_NET:
 403             ipl->netboot = true;
 404             /* Fall through to CCW_DEVTYPE_VIRTIO case */
 405         case CCW_DEVTYPE_VIRTIO:
 406             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
 407             ipl->iplb.blk0_len =
 408                 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
 409             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
 410             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
 411             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
 412             break;
 413         }
 414
 415         if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
 416             ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
 417         }
 418
 419         return true;
 420     }
 421
 422     return false;
 423 }
 424
 425 int s390_ipl_set_loadparm(uint8_t *loadparm)
 426 {
 427     MachineState *machine = MACHINE(qdev_get_machine());
 428     char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
 429
 430     if (lp) {
 431         int i;
 432
 433         /* lp is an uppercase string without leading/embedded spaces */
 434         for (i = 0; i < 8 && lp[i]; i++) {
 435             loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
 436         }
 437
 438         if (i < 8) {
 439             memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
 440         }
 441
 442         g_free(lp);
 443         return 0;
 444     }
 445
 446     return -1;
 447 }
 448
 449 static int load_netboot_image(Error **errp)
 450 {
 451     MachineState *ms = MACHINE(qdev_get_machine());
 452     S390IPLState *ipl = get_ipl_device();
 453     char *netboot_filename;
 454     MemoryRegion *sysmem =  get_system_memory();
 455     MemoryRegion *mr = NULL;
 456     void *ram_ptr = NULL;
 457     int img_size = -1;
 458
 459     mr = memory_region_find(sysmem, 0, 1).mr;
 460     if (!mr) {
 461         error_setg(errp, "Failed to find memory region at address 0");
 462         return -1;
 463     }
 464
 465     ram_ptr = memory_region_get_ram_ptr(mr);
 466     if (!ram_ptr) {
 467         error_setg(errp, "No RAM found");
 468         goto unref_mr;
 469     }
 470
 471     netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
 472     if (netboot_filename == NULL) {
 473         error_setg(errp, "Could not find network bootloader '%s'",
 474                    ipl->netboot_fw);
 475         goto unref_mr;
 476     }
 477
 478     img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
 479                             &ipl->start_addr,
 480                             NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL,
 481                             false);
 482
 483     if (img_size < 0) {
 484         img_size = load_image_size(netboot_filename, ram_ptr, ms->ram_size);
 485         ipl->start_addr = KERN_IMAGE_START;
 486     }
 487
 488     if (img_size < 0) {
 489         error_setg(errp, "Failed to load network bootloader");
 490     }
 491
 492     g_free(netboot_filename);
 493
 494 unref_mr:
 495     memory_region_unref(mr);
 496     return img_size;
 497 }
 498
 499 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
 500                                          int virtio_id)
 501 {
 502     uint8_t cssid;
 503     uint8_t ssid;
 504     uint16_t devno;
 505     uint16_t schid;
 506     SubchDev *sch = NULL;
 507
 508     if (iplb->pbt != S390_IPL_TYPE_CCW) {
 509         return false;
 510     }
 511
 512     devno = be16_to_cpu(iplb->ccw.devno);
 513     ssid = iplb->ccw.ssid & 3;
 514
 515     for (schid = 0; schid < MAX_SCHID; schid++) {
 516         for (cssid = 0; cssid < MAX_CSSID; cssid++) {
 517             sch = css_find_subch(1, cssid, ssid, schid);
 518
 519             if (sch && sch->devno == devno) {
 520                 return sch->id.cu_model == virtio_id;
 521             }
 522         }
 523     }
 524     return false;
 525 }
 526
 527 static bool is_virtio_net_device(IplParameterBlock *iplb)
 528 {
 529     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
 530 }
 531
 532 static bool is_virtio_scsi_device(IplParameterBlock *iplb)
 533 {
 534     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
 535 }
 536
 537 static void update_machine_ipl_properties(IplParameterBlock *iplb)
 538 {
 539     Object *machine = qdev_get_machine();
 540     Error *err = NULL;
 541
 542     /* Sync loadparm */
 543     if (iplb->flags & DIAG308_FLAGS_LP_VALID) {
 544         uint8_t *ebcdic_loadparm = iplb->loadparm;
 545         char ascii_loadparm[9];
 546         int i;
 547
 548         for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) {
 549             ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]];
 550         }
 551         ascii_loadparm[i] = 0;
 552         object_property_set_str(machine, "loadparm", ascii_loadparm, &err);
 553     } else {
 554         object_property_set_str(machine, "loadparm", "", &err);
 555     }
 556     if (err) {
 557         warn_report_err(err);
 558     }
 559 }
 560
 561 void s390_ipl_update_diag308(IplParameterBlock *iplb)
 562 {
 563     S390IPLState *ipl = get_ipl_device();
 564
 565     /*
 566      * The IPLB set and retrieved by subcodes 8/9 is completely
 567      * separate from the one managed via subcodes 5/6.
 568      */
 569     if (iplb->pbt == S390_IPL_TYPE_PV) {
 570         ipl->iplb_pv = *iplb;
 571         ipl->iplb_valid_pv = true;
 572     } else {
 573         ipl->iplb = *iplb;
 574         ipl->iplb_valid = true;
 575     }
 576     ipl->netboot = is_virtio_net_device(iplb);
 577     update_machine_ipl_properties(iplb);
 578 }
 579
 580 IplParameterBlock *s390_ipl_get_iplb_pv(void)
 581 {
 582     S390IPLState *ipl = get_ipl_device();
 583
 584     if (!ipl->iplb_valid_pv) {
 585         return NULL;
 586     }
 587     return &ipl->iplb_pv;
 588 }
 589
 590 IplParameterBlock *s390_ipl_get_iplb(void)
 591 {
 592     S390IPLState *ipl = get_ipl_device();
 593
 594     if (!ipl->iplb_valid) {
 595         return NULL;
 596     }
 597     return &ipl->iplb;
 598 }
 599
 600 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
 601 {
 602     S390IPLState *ipl = get_ipl_device();
 603
 604     if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
 605         /* use CPU 0 for full resets */
 606         ipl->reset_cpu_index = 0;
 607     } else {
 608         ipl->reset_cpu_index = cs->cpu_index;
 609     }
 610     ipl->reset_type = reset_type;
 611
 612     if (reset_type == S390_RESET_REIPL &&
 613         ipl->iplb_valid &&
 614         !ipl->netboot &&
 615         ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
 616         is_virtio_scsi_device(&ipl->iplb)) {
 617         CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
 618
 619         if (ccw_dev &&
 620             cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
 621             (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
 622             /*
 623              * this is the original boot device's SCSI
 624              * so restore IPL parameter info from it
 625              */
 626             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 627         }
 628     }
 629     if (reset_type == S390_RESET_MODIFIED_CLEAR ||
 630         reset_type == S390_RESET_LOAD_NORMAL ||
 631         reset_type == S390_RESET_PV) {
 632         /* ignore -no-reboot, send no event  */
 633         qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
 634     } else {
 635         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
 636     }
 637     /* as this is triggered by a CPU, make sure to exit the loop */
 638     if (tcg_enabled()) {
 639         cpu_loop_exit(cs);
 640     }
 641 }
 642
 643 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
 644 {
 645     S390IPLState *ipl = get_ipl_device();
 646
 647     *cs = qemu_get_cpu(ipl->reset_cpu_index);
 648     if (!*cs) {
 649         /* use any CPU */
 650         *cs = first_cpu;
 651     }
 652     *reset_type = ipl->reset_type;
 653 }
 654
 655 void s390_ipl_clear_reset_request(void)
 656 {
 657     S390IPLState *ipl = get_ipl_device();
 658
 659     ipl->reset_type = S390_RESET_EXTERNAL;
 660     /* use CPU 0 for full resets */
 661     ipl->reset_cpu_index = 0;
 662 }
 663
 664 static void s390_ipl_prepare_qipl(S390CPU *cpu)
 665 {
 666     S390IPLState *ipl = get_ipl_device();
 667     uint8_t *addr;
 668     uint64_t len = 4096;
 669
 670     addr = cpu_physical_memory_map(cpu->env.psa, &len, true);
 671     if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
 672         error_report("Cannot set QEMU IPL parameters");
 673         return;
 674     }
 675     memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
 676     cpu_physical_memory_unmap(addr, len, 1, len);
 677 }
 678
 679 int s390_ipl_prepare_pv_header(void)
 680 {
 681     IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
 682     IPLBlockPV *ipib_pv = &ipib->pv;
 683     void *hdr = g_malloc(ipib_pv->pv_header_len);
 684     int rc;
 685
 686     cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr,
 687                              ipib_pv->pv_header_len);
 688     rc = s390_pv_set_sec_parms((uintptr_t)hdr,
 689                                ipib_pv->pv_header_len);
 690     g_free(hdr);
 691     return rc;
 692 }
 693
 694 int s390_ipl_pv_unpack(void)
 695 {
 696     IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
 697     IPLBlockPV *ipib_pv = &ipib->pv;
 698     int i, rc = 0;
 699
 700     for (i = 0; i < ipib_pv->num_comp; i++) {
 701         rc = s390_pv_unpack(ipib_pv->components[i].addr,
 702                             TARGET_PAGE_ALIGN(ipib_pv->components[i].size),
 703                             ipib_pv->components[i].tweak_pref);
 704         if (rc) {
 705             break;
 706         }
 707     }
 708     return rc;
 709 }
 710
 711 void s390_ipl_prepare_cpu(S390CPU *cpu)
 712 {
 713     S390IPLState *ipl = get_ipl_device();
 714     Error *err = NULL;
 715
 716     cpu->env.psw.addr = ipl->start_addr;
 717     cpu->env.psw.mask = IPL_PSW_MASK;
 718
 719     if (!ipl->kernel || ipl->iplb_valid) {
 720         cpu->env.psw.addr = ipl->bios_start_addr;
 721         if (!ipl->iplb_valid) {
 722             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
 723         }
 724     }
 725     if (ipl->netboot) {
 726         if (load_netboot_image(&err) < 0) {
 727             error_report_err(err);
 728             exit(1);
 729         }
 730         ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
 731     }
 732     s390_ipl_set_boot_menu(ipl);
 733     s390_ipl_prepare_qipl(cpu);
 734 }
 735
 736 static void s390_ipl_reset(DeviceState *dev)
 737 {
 738     S390IPLState *ipl = S390_IPL(dev);
 739
 740     if (ipl->reset_type != S390_RESET_REIPL) {
 741         ipl->iplb_valid = false;
 742         memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
 743     }
 744 }
 745
 746 static void s390_ipl_class_init(ObjectClass *klass, void *data)
 747 {
 748     DeviceClass *dc = DEVICE_CLASS(klass);
 749
 750     dc->realize = s390_ipl_realize;
 751     device_class_set_props(dc, s390_ipl_properties);
 752     dc->reset = s390_ipl_reset;
 753     dc->vmsd = &vmstate_ipl;
 754     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 755     /* Reason: Loads the ROMs and thus can only be used one time - internally */
 756     dc->user_creatable = false;
 757 }
 758
 759 static const TypeInfo s390_ipl_info = {
 760     .class_init = s390_ipl_class_init,
 761     .parent = TYPE_DEVICE,
 762     .name  = TYPE_S390_IPL,
 763     .instance_size  = sizeof(S390IPLState),
 764 };
 765
 766 static void s390_ipl_register_types(void)
 767 {
 768     type_register_static(&s390_ipl_info);
 769 }
 770
 771 type_init(s390_ipl_register_types)