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