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 *bus = scsi_bus_from_device(sd); 379 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus); 380 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw, 381 vdev); 382 383 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw), 384 TYPE_CCW_DEVICE); 385 tmp_dt = CCW_DEVTYPE_SCSI; 386 } 387 } 388 } 389 if (devtype) { 390 *devtype = tmp_dt; 391 } 392 return ccw_dev; 393 } 394 395 static bool s390_gen_initial_iplb(S390IPLState *ipl) 396 { 397 DeviceState *dev_st; 398 CcwDevice *ccw_dev = NULL; 399 SCSIDevice *sd; 400 int devtype; 401 402 dev_st = get_boot_device(0); 403 if (dev_st) { 404 ccw_dev = s390_get_ccw_device(dev_st, &devtype); 405 } 406 407 /* 408 * Currently allow IPL only from CCW devices. 409 */ 410 if (ccw_dev) { 411 switch (devtype) { 412 case CCW_DEVTYPE_SCSI: 413 sd = SCSI_DEVICE(dev_st); 414 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN); 415 ipl->iplb.blk0_len = 416 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN); 417 ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI; 418 ipl->iplb.scsi.lun = cpu_to_be32(sd->lun); 419 ipl->iplb.scsi.target = cpu_to_be16(sd->id); 420 ipl->iplb.scsi.channel = cpu_to_be16(sd->channel); 421 ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno); 422 ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3; 423 break; 424 case CCW_DEVTYPE_VFIO: 425 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 426 ipl->iplb.pbt = S390_IPL_TYPE_CCW; 427 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 428 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3; 429 break; 430 case CCW_DEVTYPE_VIRTIO_NET: 431 ipl->netboot = true; 432 /* Fall through to CCW_DEVTYPE_VIRTIO case */ 433 case CCW_DEVTYPE_VIRTIO: 434 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 435 ipl->iplb.blk0_len = 436 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN); 437 ipl->iplb.pbt = S390_IPL_TYPE_CCW; 438 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 439 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3; 440 break; 441 } 442 443 if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) { 444 ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID; 445 } 446 447 return true; 448 } 449 450 return false; 451 } 452 453 int s390_ipl_set_loadparm(uint8_t *loadparm) 454 { 455 MachineState *machine = MACHINE(qdev_get_machine()); 456 char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL); 457 458 if (lp) { 459 int i; 460 461 /* lp is an uppercase string without leading/embedded spaces */ 462 for (i = 0; i < 8 && lp[i]; i++) { 463 loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]]; 464 } 465 466 if (i < 8) { 467 memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */ 468 } 469 470 g_free(lp); 471 return 0; 472 } 473 474 return -1; 475 } 476 477 static int load_netboot_image(Error **errp) 478 { 479 MachineState *ms = MACHINE(qdev_get_machine()); 480 S390IPLState *ipl = get_ipl_device(); 481 char *netboot_filename; 482 MemoryRegion *sysmem = get_system_memory(); 483 MemoryRegion *mr = NULL; 484 void *ram_ptr = NULL; 485 int img_size = -1; 486 487 mr = memory_region_find(sysmem, 0, 1).mr; 488 if (!mr) { 489 error_setg(errp, "Failed to find memory region at address 0"); 490 return -1; 491 } 492 493 ram_ptr = memory_region_get_ram_ptr(mr); 494 if (!ram_ptr) { 495 error_setg(errp, "No RAM found"); 496 goto unref_mr; 497 } 498 499 netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw); 500 if (netboot_filename == NULL) { 501 error_setg(errp, "Could not find network bootloader '%s'", 502 ipl->netboot_fw); 503 goto unref_mr; 504 } 505 506 img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL, 507 &ipl->start_addr, 508 NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL, 509 false); 510 511 if (img_size < 0) { 512 img_size = load_image_size(netboot_filename, ram_ptr, ms->ram_size); 513 ipl->start_addr = KERN_IMAGE_START; 514 } 515 516 if (img_size < 0) { 517 error_setg(errp, "Failed to load network bootloader"); 518 } 519 520 g_free(netboot_filename); 521 522 unref_mr: 523 memory_region_unref(mr); 524 return img_size; 525 } 526 527 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb, 528 int virtio_id) 529 { 530 uint8_t cssid; 531 uint8_t ssid; 532 uint16_t devno; 533 uint16_t schid; 534 SubchDev *sch = NULL; 535 536 if (iplb->pbt != S390_IPL_TYPE_CCW) { 537 return false; 538 } 539 540 devno = be16_to_cpu(iplb->ccw.devno); 541 ssid = iplb->ccw.ssid & 3; 542 543 for (schid = 0; schid < MAX_SCHID; schid++) { 544 for (cssid = 0; cssid < MAX_CSSID; cssid++) { 545 sch = css_find_subch(1, cssid, ssid, schid); 546 547 if (sch && sch->devno == devno) { 548 return sch->id.cu_model == virtio_id; 549 } 550 } 551 } 552 return false; 553 } 554 555 static bool is_virtio_net_device(IplParameterBlock *iplb) 556 { 557 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET); 558 } 559 560 static bool is_virtio_scsi_device(IplParameterBlock *iplb) 561 { 562 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI); 563 } 564 565 static void update_machine_ipl_properties(IplParameterBlock *iplb) 566 { 567 Object *machine = qdev_get_machine(); 568 Error *err = NULL; 569 570 /* Sync loadparm */ 571 if (iplb->flags & DIAG308_FLAGS_LP_VALID) { 572 uint8_t *ebcdic_loadparm = iplb->loadparm; 573 char ascii_loadparm[9]; 574 int i; 575 576 for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) { 577 ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]]; 578 } 579 ascii_loadparm[i] = 0; 580 object_property_set_str(machine, "loadparm", ascii_loadparm, &err); 581 } else { 582 object_property_set_str(machine, "loadparm", "", &err); 583 } 584 if (err) { 585 warn_report_err(err); 586 } 587 } 588 589 void s390_ipl_update_diag308(IplParameterBlock *iplb) 590 { 591 S390IPLState *ipl = get_ipl_device(); 592 593 /* 594 * The IPLB set and retrieved by subcodes 8/9 is completely 595 * separate from the one managed via subcodes 5/6. 596 */ 597 if (iplb->pbt == S390_IPL_TYPE_PV) { 598 ipl->iplb_pv = *iplb; 599 ipl->iplb_valid_pv = true; 600 } else { 601 ipl->iplb = *iplb; 602 ipl->iplb_valid = true; 603 } 604 ipl->netboot = is_virtio_net_device(iplb); 605 update_machine_ipl_properties(iplb); 606 } 607 608 IplParameterBlock *s390_ipl_get_iplb_pv(void) 609 { 610 S390IPLState *ipl = get_ipl_device(); 611 612 if (!ipl->iplb_valid_pv) { 613 return NULL; 614 } 615 return &ipl->iplb_pv; 616 } 617 618 IplParameterBlock *s390_ipl_get_iplb(void) 619 { 620 S390IPLState *ipl = get_ipl_device(); 621 622 if (!ipl->iplb_valid) { 623 return NULL; 624 } 625 return &ipl->iplb; 626 } 627 628 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type) 629 { 630 S390IPLState *ipl = get_ipl_device(); 631 632 if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) { 633 /* use CPU 0 for full resets */ 634 ipl->reset_cpu_index = 0; 635 } else { 636 ipl->reset_cpu_index = cs->cpu_index; 637 } 638 ipl->reset_type = reset_type; 639 640 if (reset_type == S390_RESET_REIPL && 641 ipl->iplb_valid && 642 !ipl->netboot && 643 ipl->iplb.pbt == S390_IPL_TYPE_CCW && 644 is_virtio_scsi_device(&ipl->iplb)) { 645 CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL); 646 647 if (ccw_dev && 648 cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno && 649 (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) { 650 /* 651 * this is the original boot device's SCSI 652 * so restore IPL parameter info from it 653 */ 654 ipl->iplb_valid = s390_gen_initial_iplb(ipl); 655 } 656 } 657 if (reset_type == S390_RESET_MODIFIED_CLEAR || 658 reset_type == S390_RESET_LOAD_NORMAL || 659 reset_type == S390_RESET_PV) { 660 /* ignore -no-reboot, send no event */ 661 qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET); 662 } else { 663 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 664 } 665 /* as this is triggered by a CPU, make sure to exit the loop */ 666 if (tcg_enabled()) { 667 cpu_loop_exit(cs); 668 } 669 } 670 671 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type) 672 { 673 S390IPLState *ipl = get_ipl_device(); 674 675 *cs = qemu_get_cpu(ipl->reset_cpu_index); 676 if (!*cs) { 677 /* use any CPU */ 678 *cs = first_cpu; 679 } 680 *reset_type = ipl->reset_type; 681 } 682 683 void s390_ipl_clear_reset_request(void) 684 { 685 S390IPLState *ipl = get_ipl_device(); 686 687 ipl->reset_type = S390_RESET_EXTERNAL; 688 /* use CPU 0 for full resets */ 689 ipl->reset_cpu_index = 0; 690 } 691 692 static void s390_ipl_prepare_qipl(S390CPU *cpu) 693 { 694 S390IPLState *ipl = get_ipl_device(); 695 uint8_t *addr; 696 uint64_t len = 4096; 697 698 addr = cpu_physical_memory_map(cpu->env.psa, &len, true); 699 if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) { 700 error_report("Cannot set QEMU IPL parameters"); 701 return; 702 } 703 memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters)); 704 cpu_physical_memory_unmap(addr, len, 1, len); 705 } 706 707 int s390_ipl_prepare_pv_header(void) 708 { 709 IplParameterBlock *ipib = s390_ipl_get_iplb_pv(); 710 IPLBlockPV *ipib_pv = &ipib->pv; 711 void *hdr = g_malloc(ipib_pv->pv_header_len); 712 int rc; 713 714 cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr, 715 ipib_pv->pv_header_len); 716 rc = s390_pv_set_sec_parms((uintptr_t)hdr, 717 ipib_pv->pv_header_len); 718 g_free(hdr); 719 return rc; 720 } 721 722 int s390_ipl_pv_unpack(void) 723 { 724 IplParameterBlock *ipib = s390_ipl_get_iplb_pv(); 725 IPLBlockPV *ipib_pv = &ipib->pv; 726 int i, rc = 0; 727 728 for (i = 0; i < ipib_pv->num_comp; i++) { 729 rc = s390_pv_unpack(ipib_pv->components[i].addr, 730 TARGET_PAGE_ALIGN(ipib_pv->components[i].size), 731 ipib_pv->components[i].tweak_pref); 732 if (rc) { 733 break; 734 } 735 } 736 return rc; 737 } 738 739 void s390_ipl_prepare_cpu(S390CPU *cpu) 740 { 741 S390IPLState *ipl = get_ipl_device(); 742 743 cpu->env.psw.addr = ipl->start_addr; 744 cpu->env.psw.mask = IPL_PSW_MASK; 745 746 if (!ipl->kernel || ipl->iplb_valid) { 747 cpu->env.psw.addr = ipl->bios_start_addr; 748 if (!ipl->iplb_valid) { 749 ipl->iplb_valid = s390_gen_initial_iplb(ipl); 750 } 751 } 752 if (ipl->netboot) { 753 load_netboot_image(&error_fatal); 754 ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr); 755 } 756 s390_ipl_set_boot_menu(ipl); 757 s390_ipl_prepare_qipl(cpu); 758 } 759 760 static void s390_ipl_reset(DeviceState *dev) 761 { 762 S390IPLState *ipl = S390_IPL(dev); 763 764 if (ipl->reset_type != S390_RESET_REIPL) { 765 ipl->iplb_valid = false; 766 memset(&ipl->iplb, 0, sizeof(IplParameterBlock)); 767 } 768 } 769 770 static void s390_ipl_class_init(ObjectClass *klass, void *data) 771 { 772 DeviceClass *dc = DEVICE_CLASS(klass); 773 774 dc->realize = s390_ipl_realize; 775 device_class_set_props(dc, s390_ipl_properties); 776 dc->reset = s390_ipl_reset; 777 dc->vmsd = &vmstate_ipl; 778 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 779 /* Reason: Loads the ROMs and thus can only be used one time - internally */ 780 dc->user_creatable = false; 781 } 782 783 static const TypeInfo s390_ipl_info = { 784 .class_init = s390_ipl_class_init, 785 .parent = TYPE_DEVICE, 786 .name = TYPE_S390_IPL, 787 .instance_size = sizeof(S390IPLState), 788 }; 789 790 static void s390_ipl_register_types(void) 791 { 792 type_register_static(&s390_ipl_info); 793 } 794 795 type_init(s390_ipl_register_types) 796