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 "system/reset.h" 19 #include "system/runstate.h" 20 #include "system/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 "target/s390x/kvm/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 "qemu/ctype.h" 38 #include "standard-headers/linux/virtio_ids.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 BIOS_MAX_SIZE 0x300000UL 50 #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) 51 52 /* Place the IPLB chain immediately before the BIOS in memory */ 53 static uint64_t find_iplb_chain_addr(uint64_t bios_addr, uint16_t count) 54 { 55 return (bios_addr & TARGET_PAGE_MASK) 56 - (count * sizeof(IplParameterBlock)); 57 } 58 59 static const VMStateDescription vmstate_iplb_extended = { 60 .name = "ipl/iplb_extended", 61 .version_id = 0, 62 .minimum_version_id = 0, 63 .fields = (const 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 = (const 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 * const []) { 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 = (const 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; 149 150 if (ms->ram_size < BIOS_MAX_SIZE) { 151 error_setg(errp, "not enough RAM to load the BIOS file"); 152 return; 153 } 154 155 fwbase = (MIN(ms->ram_size, 0x80000000U) - BIOS_MAX_SIZE) & ~0xffffUL; 156 157 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->firmware); 158 if (bios_filename == NULL) { 159 error_setg(errp, "could not find stage1 bootloader"); 160 return; 161 } 162 163 bios_size = load_elf(bios_filename, NULL, 164 bios_translate_addr, &fwbase, 165 &ipl->bios_start_addr, NULL, NULL, NULL, 166 ELFDATA2MSB, EM_S390, 0, 0); 167 if (bios_size > 0) { 168 /* Adjust ELF start address to final location */ 169 ipl->bios_start_addr += fwbase; 170 } else { 171 /* Try to load non-ELF file */ 172 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, 173 4096); 174 ipl->bios_start_addr = ZIPL_IMAGE_START; 175 } 176 g_free(bios_filename); 177 178 if (bios_size == -1) { 179 error_setg(errp, "could not load bootloader '%s'", ipl->firmware); 180 return; 181 } 182 183 /* default boot target is the bios */ 184 ipl->start_addr = ipl->bios_start_addr; 185 } 186 187 if (ipl->kernel) { 188 kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL, 189 &pentry, NULL, 190 NULL, NULL, ELFDATA2MSB, EM_S390, 0, 0); 191 if (kernel_size < 0) { 192 kernel_size = load_image_targphys(ipl->kernel, 0, ms->ram_size); 193 if (kernel_size < 0) { 194 error_setg(errp, "could not load kernel '%s'", ipl->kernel); 195 return; 196 } 197 /* if this is Linux use KERN_IMAGE_START */ 198 magic = rom_ptr(LINUX_MAGIC_ADDR, 6); 199 if (magic && !memcmp(magic, "S390EP", 6)) { 200 pentry = KERN_IMAGE_START; 201 } else { 202 /* if not Linux load the address of the (short) IPL PSW */ 203 ipl_psw = rom_ptr(4, 4); 204 if (ipl_psw) { 205 pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR; 206 } else { 207 error_setg(errp, "Could not get IPL PSW"); 208 return; 209 } 210 } 211 } 212 /* 213 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the 214 * kernel parameters here as well. Note: For old kernels (up to 3.2) 215 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL 216 * loader) and it won't work. For this case we force it to 0x10000, too. 217 */ 218 if (pentry == KERN_IMAGE_START || pentry == 0x800) { 219 size_t cmdline_size = strlen(ipl->cmdline) + 1; 220 char *parm_area = rom_ptr(KERN_PARM_AREA, cmdline_size); 221 222 ipl->start_addr = KERN_IMAGE_START; 223 /* Overwrite parameters in the kernel image, which are "rom" */ 224 if (parm_area) { 225 uint64_t max_cmdline_size = get_max_kernel_cmdline_size(); 226 227 if (cmdline_size > max_cmdline_size) { 228 error_setg(errp, 229 "kernel command line exceeds maximum size:" 230 " %zu > %" PRIu64, 231 cmdline_size, max_cmdline_size); 232 return; 233 } 234 235 strcpy(parm_area, ipl->cmdline); 236 } 237 } else { 238 ipl->start_addr = pentry; 239 } 240 241 if (ipl->initrd) { 242 ram_addr_t initrd_offset; 243 int initrd_size; 244 uint64_t *romptr; 245 246 initrd_offset = INITRD_START; 247 while (kernel_size + 0x100000 > initrd_offset) { 248 initrd_offset += 0x100000; 249 } 250 initrd_size = load_image_targphys(ipl->initrd, initrd_offset, 251 ms->ram_size - initrd_offset); 252 if (initrd_size == -1) { 253 error_setg(errp, "could not load initrd '%s'", ipl->initrd); 254 return; 255 } 256 257 /* 258 * we have to overwrite values in the kernel image, 259 * which are "rom" 260 */ 261 romptr = rom_ptr(INITRD_PARM_START, 16); 262 if (romptr) { 263 stq_be_p(romptr, initrd_offset); 264 stq_be_p(romptr + 1, initrd_size); 265 } 266 } 267 } 268 /* 269 * Don't ever use the migrated values, they could come from a different 270 * BIOS and therefore don't work. But still migrate the values, so 271 * QEMUs relying on it don't break. 272 */ 273 ipl->compat_start_addr = ipl->start_addr; 274 ipl->compat_bios_start_addr = ipl->bios_start_addr; 275 /* 276 * Because this Device is not on any bus in the qbus tree (it is 277 * not a sysbus device and it's not on some other bus like a PCI 278 * bus) it will not be automatically reset by the 'reset the 279 * sysbus' hook registered by vl.c like most devices. So we must 280 * manually register a reset hook for it. 281 * TODO: there should be a better way to do this. 282 */ 283 qemu_register_reset(resettable_cold_reset_fn, dev); 284 } 285 286 static const Property s390_ipl_properties[] = { 287 DEFINE_PROP_STRING("kernel", S390IPLState, kernel), 288 DEFINE_PROP_STRING("initrd", S390IPLState, initrd), 289 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), 290 DEFINE_PROP_STRING("firmware", S390IPLState, firmware), 291 DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), 292 }; 293 294 static void s390_ipl_set_boot_menu(S390IPLState *ipl) 295 { 296 unsigned long splash_time = 0; 297 298 if (!get_boot_device(0)) { 299 if (current_machine->boot_config.has_menu && current_machine->boot_config.menu) { 300 error_report("boot menu requires a bootindex to be specified for " 301 "the IPL device"); 302 } 303 return; 304 } 305 306 switch (ipl->iplb.pbt) { 307 case S390_IPL_TYPE_CCW: 308 /* In the absence of -boot menu, use zipl parameters */ 309 if (!current_machine->boot_config.has_menu) { 310 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL; 311 return; 312 } 313 break; 314 case S390_IPL_TYPE_QEMU_SCSI: 315 break; 316 default: 317 if (current_machine->boot_config.has_menu && current_machine->boot_config.menu) { 318 error_report("boot menu is not supported for this device type"); 319 } 320 return; 321 } 322 323 if (!current_machine->boot_config.has_menu || !current_machine->boot_config.menu) { 324 return; 325 } 326 327 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD; 328 329 if (current_machine->boot_config.has_splash_time) { 330 splash_time = current_machine->boot_config.splash_time; 331 } 332 if (splash_time > 0xffffffff) { 333 error_report("splash-time is too large, forcing it to max value"); 334 ipl->qipl.boot_menu_timeout = 0xffffffff; 335 return; 336 } 337 338 ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time); 339 } 340 341 #define CCW_DEVTYPE_NONE 0x00 342 #define CCW_DEVTYPE_VIRTIO 0x01 343 #define CCW_DEVTYPE_VIRTIO_NET 0x02 344 #define CCW_DEVTYPE_SCSI 0x03 345 #define CCW_DEVTYPE_VFIO 0x04 346 347 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype) 348 { 349 CcwDevice *ccw_dev = NULL; 350 int tmp_dt = CCW_DEVTYPE_NONE; 351 352 if (dev_st) { 353 VirtIONet *virtio_net_dev = (VirtIONet *) 354 object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET); 355 VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *) 356 object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent), 357 TYPE_VIRTIO_CCW_DEVICE); 358 VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *) 359 object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW); 360 361 if (virtio_ccw_dev) { 362 ccw_dev = CCW_DEVICE(virtio_ccw_dev); 363 if (virtio_net_dev) { 364 tmp_dt = CCW_DEVTYPE_VIRTIO_NET; 365 } else { 366 tmp_dt = CCW_DEVTYPE_VIRTIO; 367 } 368 } else if (vfio_ccw_dev) { 369 ccw_dev = CCW_DEVICE(vfio_ccw_dev); 370 tmp_dt = CCW_DEVTYPE_VFIO; 371 } else { 372 SCSIDevice *sd = (SCSIDevice *) 373 object_dynamic_cast(OBJECT(dev_st), 374 TYPE_SCSI_DEVICE); 375 if (sd) { 376 SCSIBus *sbus = scsi_bus_from_device(sd); 377 VirtIODevice *vdev = (VirtIODevice *) 378 object_dynamic_cast(OBJECT(sbus->qbus.parent), 379 TYPE_VIRTIO_DEVICE); 380 if (vdev) { 381 ccw_dev = (CcwDevice *) 382 object_dynamic_cast(OBJECT(qdev_get_parent_bus(DEVICE(vdev))->parent), 383 TYPE_CCW_DEVICE); 384 if (ccw_dev) { 385 tmp_dt = CCW_DEVTYPE_SCSI; 386 } 387 } 388 } 389 } 390 } 391 if (devtype) { 392 *devtype = tmp_dt; 393 } 394 return ccw_dev; 395 } 396 397 static uint64_t s390_ipl_map_iplb_chain(IplParameterBlock *iplb_chain) 398 { 399 S390IPLState *ipl = get_ipl_device(); 400 uint16_t count = be16_to_cpu(ipl->qipl.chain_len); 401 uint64_t len = sizeof(IplParameterBlock) * count; 402 uint64_t chain_addr = find_iplb_chain_addr(ipl->bios_start_addr, count); 403 404 cpu_physical_memory_write(chain_addr, iplb_chain, len); 405 return chain_addr; 406 } 407 408 void s390_ipl_fmt_loadparm(uint8_t *loadparm, char *str, Error **errp) 409 { 410 /* Initialize the loadparm with spaces */ 411 memset(loadparm, ' ', LOADPARM_LEN); 412 qdev_prop_sanitize_s390x_loadparm(loadparm, str, errp); 413 } 414 415 void s390_ipl_convert_loadparm(char *ascii_lp, uint8_t *ebcdic_lp) 416 { 417 int i; 418 419 /* Initialize the loadparm with EBCDIC spaces (0x40) */ 420 memset(ebcdic_lp, '@', LOADPARM_LEN); 421 for (i = 0; i < LOADPARM_LEN && ascii_lp[i]; i++) { 422 ebcdic_lp[i] = ascii2ebcdic[(uint8_t) ascii_lp[i]]; 423 } 424 } 425 426 static bool s390_build_iplb(DeviceState *dev_st, IplParameterBlock *iplb) 427 { 428 CcwDevice *ccw_dev = NULL; 429 SCSIDevice *sd; 430 int devtype; 431 uint8_t *lp; 432 g_autofree void *scsi_lp = NULL; 433 434 /* 435 * Currently allow IPL only from CCW devices. 436 */ 437 ccw_dev = s390_get_ccw_device(dev_st, &devtype); 438 if (ccw_dev) { 439 lp = ccw_dev->loadparm; 440 441 switch (devtype) { 442 case CCW_DEVTYPE_SCSI: 443 sd = SCSI_DEVICE(dev_st); 444 scsi_lp = object_property_get_str(OBJECT(sd), "loadparm", NULL); 445 if (scsi_lp && strlen(scsi_lp) > 0) { 446 lp = scsi_lp; 447 } 448 iplb->len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN); 449 iplb->blk0_len = 450 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN); 451 iplb->pbt = S390_IPL_TYPE_QEMU_SCSI; 452 iplb->scsi.lun = cpu_to_be32(sd->lun); 453 iplb->scsi.target = cpu_to_be16(sd->id); 454 iplb->scsi.channel = cpu_to_be16(sd->channel); 455 iplb->scsi.devno = cpu_to_be16(ccw_dev->sch->devno); 456 iplb->scsi.ssid = ccw_dev->sch->ssid & 3; 457 break; 458 case CCW_DEVTYPE_VFIO: 459 iplb->len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 460 iplb->pbt = S390_IPL_TYPE_CCW; 461 iplb->ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 462 iplb->ccw.ssid = ccw_dev->sch->ssid & 3; 463 break; 464 case CCW_DEVTYPE_VIRTIO_NET: 465 case CCW_DEVTYPE_VIRTIO: 466 iplb->len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 467 iplb->blk0_len = 468 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN); 469 iplb->pbt = S390_IPL_TYPE_CCW; 470 iplb->ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 471 iplb->ccw.ssid = ccw_dev->sch->ssid & 3; 472 break; 473 } 474 475 /* If the device loadparm is empty use the global machine loadparm */ 476 if (memcmp(lp, NO_LOADPARM, 8) == 0) { 477 lp = S390_CCW_MACHINE(qdev_get_machine())->loadparm; 478 } 479 480 s390_ipl_convert_loadparm((char *)lp, iplb->loadparm); 481 iplb->flags |= DIAG308_FLAGS_LP_VALID; 482 483 return true; 484 } 485 486 return false; 487 } 488 489 void s390_rebuild_iplb(uint16_t dev_index, IplParameterBlock *iplb) 490 { 491 S390IPLState *ipl = get_ipl_device(); 492 uint16_t index; 493 index = ipl->rebuilt_iplb ? ipl->iplb_index : dev_index; 494 495 ipl->rebuilt_iplb = s390_build_iplb(get_boot_device(index), iplb); 496 ipl->iplb_index = index; 497 } 498 499 static bool s390_init_all_iplbs(S390IPLState *ipl) 500 { 501 int iplb_num = 0; 502 IplParameterBlock iplb_chain[7]; 503 DeviceState *dev_st = get_boot_device(0); 504 Object *machine = qdev_get_machine(); 505 506 /* 507 * Parse the boot devices. Generate an IPLB for only the first boot device 508 * which will later be set with DIAG308. 509 */ 510 if (!dev_st) { 511 ipl->qipl.chain_len = 0; 512 return false; 513 } 514 515 /* If no machine loadparm was defined fill it with spaces */ 516 if (memcmp(S390_CCW_MACHINE(machine)->loadparm, NO_LOADPARM, 8) == 0) { 517 object_property_set_str(machine, "loadparm", " ", NULL); 518 } 519 520 iplb_num = 1; 521 s390_build_iplb(dev_st, &ipl->iplb); 522 523 /* Index any fallback boot devices */ 524 while (get_boot_device(iplb_num)) { 525 iplb_num++; 526 } 527 528 if (iplb_num > MAX_BOOT_DEVS) { 529 warn_report("Excess boot devices defined! %d boot devices found, " 530 "but only the first %d will be considered.", 531 iplb_num, MAX_BOOT_DEVS); 532 533 iplb_num = MAX_BOOT_DEVS; 534 } 535 536 ipl->qipl.chain_len = cpu_to_be16(iplb_num - 1); 537 538 /* 539 * Build fallback IPLBs for any boot devices above index 0, up to a 540 * maximum amount as defined in ipl.h 541 */ 542 if (iplb_num > 1) { 543 /* Start at 1 because the IPLB for boot index 0 is not chained */ 544 for (int i = 1; i < iplb_num; i++) { 545 dev_st = get_boot_device(i); 546 s390_build_iplb(dev_st, &iplb_chain[i - 1]); 547 } 548 549 ipl->qipl.next_iplb = cpu_to_be64(s390_ipl_map_iplb_chain(iplb_chain)); 550 } 551 552 return iplb_num; 553 } 554 555 static void update_machine_ipl_properties(IplParameterBlock *iplb) 556 { 557 Object *machine = qdev_get_machine(); 558 Error *err = NULL; 559 560 /* Sync loadparm */ 561 if (iplb->flags & DIAG308_FLAGS_LP_VALID) { 562 uint8_t *ebcdic_loadparm = iplb->loadparm; 563 char ascii_loadparm[9]; 564 int i; 565 566 for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) { 567 ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]]; 568 } 569 ascii_loadparm[i] = 0; 570 object_property_set_str(machine, "loadparm", ascii_loadparm, &err); 571 } else { 572 object_property_set_str(machine, "loadparm", " ", &err); 573 } 574 if (err) { 575 warn_report_err(err); 576 } 577 } 578 579 void s390_ipl_update_diag308(IplParameterBlock *iplb) 580 { 581 S390IPLState *ipl = get_ipl_device(); 582 583 /* 584 * The IPLB set and retrieved by subcodes 8/9 is completely 585 * separate from the one managed via subcodes 5/6. 586 */ 587 if (iplb->pbt == S390_IPL_TYPE_PV) { 588 ipl->iplb_pv = *iplb; 589 ipl->iplb_valid_pv = true; 590 } else { 591 ipl->iplb = *iplb; 592 ipl->iplb_valid = true; 593 } 594 595 update_machine_ipl_properties(iplb); 596 } 597 598 IplParameterBlock *s390_ipl_get_iplb_pv(void) 599 { 600 S390IPLState *ipl = get_ipl_device(); 601 602 if (!ipl->iplb_valid_pv) { 603 return NULL; 604 } 605 return &ipl->iplb_pv; 606 } 607 608 IplParameterBlock *s390_ipl_get_iplb(void) 609 { 610 S390IPLState *ipl = get_ipl_device(); 611 612 if (!ipl->iplb_valid) { 613 return NULL; 614 } 615 return &ipl->iplb; 616 } 617 618 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type) 619 { 620 S390IPLState *ipl = get_ipl_device(); 621 if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) { 622 /* use CPU 0 for full resets */ 623 ipl->reset_cpu_index = 0; 624 } else { 625 ipl->reset_cpu_index = cs->cpu_index; 626 } 627 628 ipl->reset_type = reset_type; 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(Error **errp) 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, ipib_pv->pv_header_len, errp); 689 g_free(hdr); 690 return rc; 691 } 692 693 int s390_ipl_pv_unpack(void) 694 { 695 IplParameterBlock *ipib = s390_ipl_get_iplb_pv(); 696 IPLBlockPV *ipib_pv = &ipib->pv; 697 int i, rc = 0; 698 699 for (i = 0; i < ipib_pv->num_comp; i++) { 700 rc = s390_pv_unpack(ipib_pv->components[i].addr, 701 TARGET_PAGE_ALIGN(ipib_pv->components[i].size), 702 ipib_pv->components[i].tweak_pref); 703 if (rc) { 704 break; 705 } 706 } 707 return rc; 708 } 709 710 void s390_ipl_prepare_cpu(S390CPU *cpu) 711 { 712 S390IPLState *ipl = get_ipl_device(); 713 714 cpu->env.psw.addr = ipl->start_addr; 715 cpu->env.psw.mask = IPL_PSW_MASK; 716 717 if (!ipl->kernel || ipl->iplb_valid) { 718 cpu->env.psw.addr = ipl->bios_start_addr; 719 if (!ipl->iplb_valid) { 720 ipl->iplb_valid = s390_init_all_iplbs(ipl); 721 } else { 722 ipl->qipl.chain_len = 0; 723 } 724 } 725 s390_ipl_set_boot_menu(ipl); 726 s390_ipl_prepare_qipl(cpu); 727 } 728 729 static void s390_ipl_reset(DeviceState *dev) 730 { 731 S390IPLState *ipl = S390_IPL(dev); 732 733 if (ipl->reset_type != S390_RESET_REIPL) { 734 ipl->iplb_valid = false; 735 memset(&ipl->iplb, 0, sizeof(IplParameterBlock)); 736 } 737 } 738 739 static void s390_ipl_class_init(ObjectClass *klass, void *data) 740 { 741 DeviceClass *dc = DEVICE_CLASS(klass); 742 743 dc->realize = s390_ipl_realize; 744 device_class_set_props(dc, s390_ipl_properties); 745 device_class_set_legacy_reset(dc, s390_ipl_reset); 746 dc->vmsd = &vmstate_ipl; 747 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 748 /* Reason: Loads the ROMs and thus can only be used one time - internally */ 749 dc->user_creatable = false; 750 } 751 752 static const TypeInfo s390_ipl_info = { 753 .class_init = s390_ipl_class_init, 754 .parent = TYPE_DEVICE, 755 .name = TYPE_S390_IPL, 756 .instance_size = sizeof(S390IPLState), 757 }; 758 759 static void s390_ipl_register_types(void) 760 { 761 type_register_static(&s390_ipl_info); 762 } 763 764 type_init(s390_ipl_register_types) 765