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 "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 static bool iplb_extended_needed(void *opaque) 53 { 54 S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL)); 55 56 return ipl->iplbext_migration; 57 } 58 59 /* Place the IPLB chain immediately before the BIOS in memory */ 60 static uint64_t find_iplb_chain_addr(uint64_t bios_addr, uint16_t count) 61 { 62 return (bios_addr & TARGET_PAGE_MASK) 63 - (count * sizeof(IplParameterBlock)); 64 } 65 66 static const VMStateDescription vmstate_iplb_extended = { 67 .name = "ipl/iplb_extended", 68 .version_id = 0, 69 .minimum_version_id = 0, 70 .needed = iplb_extended_needed, 71 .fields = (const VMStateField[]) { 72 VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200), 73 VMSTATE_END_OF_LIST() 74 } 75 }; 76 77 static const VMStateDescription vmstate_iplb = { 78 .name = "ipl/iplb", 79 .version_id = 0, 80 .minimum_version_id = 0, 81 .fields = (const VMStateField[]) { 82 VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110), 83 VMSTATE_UINT16(devno, IplParameterBlock), 84 VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88), 85 VMSTATE_END_OF_LIST() 86 }, 87 .subsections = (const VMStateDescription * const []) { 88 &vmstate_iplb_extended, 89 NULL 90 } 91 }; 92 93 static const VMStateDescription vmstate_ipl = { 94 .name = "ipl", 95 .version_id = 0, 96 .minimum_version_id = 0, 97 .fields = (const VMStateField[]) { 98 VMSTATE_UINT64(compat_start_addr, S390IPLState), 99 VMSTATE_UINT64(compat_bios_start_addr, S390IPLState), 100 VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock), 101 VMSTATE_BOOL(iplb_valid, S390IPLState), 102 VMSTATE_UINT8(cssid, S390IPLState), 103 VMSTATE_UINT8(ssid, S390IPLState), 104 VMSTATE_UINT16(devno, S390IPLState), 105 VMSTATE_END_OF_LIST() 106 } 107 }; 108 109 static S390IPLState *get_ipl_device(void) 110 { 111 return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL)); 112 } 113 114 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr) 115 { 116 uint64_t dstaddr = *(uint64_t *) opaque; 117 /* 118 * Assuming that our s390-ccw.img was linked for starting at address 0, 119 * we can simply add the destination address for the final location 120 */ 121 return srcaddr + dstaddr; 122 } 123 124 static uint64_t get_max_kernel_cmdline_size(void) 125 { 126 uint64_t *size_ptr = rom_ptr(KERN_PARM_AREA_SIZE_ADDR, sizeof(*size_ptr)); 127 128 if (size_ptr) { 129 uint64_t size; 130 131 size = be64_to_cpu(*size_ptr); 132 if (size) { 133 return size; 134 } 135 } 136 return LEGACY_KERN_PARM_AREA_SIZE; 137 } 138 139 static void s390_ipl_realize(DeviceState *dev, Error **errp) 140 { 141 MachineState *ms = MACHINE(qdev_get_machine()); 142 S390IPLState *ipl = S390_IPL(dev); 143 uint32_t *ipl_psw; 144 uint64_t pentry; 145 char *magic; 146 int kernel_size; 147 148 int bios_size; 149 char *bios_filename; 150 151 /* 152 * Always load the bios if it was enforced, 153 * even if an external kernel has been defined. 154 */ 155 if (!ipl->kernel || ipl->enforce_bios) { 156 uint64_t fwbase; 157 158 if (ms->ram_size < BIOS_MAX_SIZE) { 159 error_setg(errp, "not enough RAM to load the BIOS file"); 160 return; 161 } 162 163 fwbase = (MIN(ms->ram_size, 0x80000000U) - BIOS_MAX_SIZE) & ~0xffffUL; 164 165 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->firmware); 166 if (bios_filename == NULL) { 167 error_setg(errp, "could not find stage1 bootloader"); 168 return; 169 } 170 171 bios_size = load_elf(bios_filename, NULL, 172 bios_translate_addr, &fwbase, 173 &ipl->bios_start_addr, NULL, NULL, NULL, 1, 174 EM_S390, 0, 0); 175 if (bios_size > 0) { 176 /* Adjust ELF start address to final location */ 177 ipl->bios_start_addr += fwbase; 178 } else { 179 /* Try to load non-ELF file */ 180 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, 181 4096); 182 ipl->bios_start_addr = ZIPL_IMAGE_START; 183 } 184 g_free(bios_filename); 185 186 if (bios_size == -1) { 187 error_setg(errp, "could not load bootloader '%s'", ipl->firmware); 188 return; 189 } 190 191 /* default boot target is the bios */ 192 ipl->start_addr = ipl->bios_start_addr; 193 } 194 195 if (ipl->kernel) { 196 kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL, 197 &pentry, NULL, 198 NULL, NULL, 1, EM_S390, 0, 0); 199 if (kernel_size < 0) { 200 kernel_size = load_image_targphys(ipl->kernel, 0, ms->ram_size); 201 if (kernel_size < 0) { 202 error_setg(errp, "could not load kernel '%s'", ipl->kernel); 203 return; 204 } 205 /* if this is Linux use KERN_IMAGE_START */ 206 magic = rom_ptr(LINUX_MAGIC_ADDR, 6); 207 if (magic && !memcmp(magic, "S390EP", 6)) { 208 pentry = KERN_IMAGE_START; 209 } else { 210 /* if not Linux load the address of the (short) IPL PSW */ 211 ipl_psw = rom_ptr(4, 4); 212 if (ipl_psw) { 213 pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR; 214 } else { 215 error_setg(errp, "Could not get IPL PSW"); 216 return; 217 } 218 } 219 } 220 /* 221 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the 222 * kernel parameters here as well. Note: For old kernels (up to 3.2) 223 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL 224 * loader) and it won't work. For this case we force it to 0x10000, too. 225 */ 226 if (pentry == KERN_IMAGE_START || pentry == 0x800) { 227 size_t cmdline_size = strlen(ipl->cmdline) + 1; 228 char *parm_area = rom_ptr(KERN_PARM_AREA, cmdline_size); 229 230 ipl->start_addr = KERN_IMAGE_START; 231 /* Overwrite parameters in the kernel image, which are "rom" */ 232 if (parm_area) { 233 uint64_t max_cmdline_size = get_max_kernel_cmdline_size(); 234 235 if (cmdline_size > max_cmdline_size) { 236 error_setg(errp, 237 "kernel command line exceeds maximum size:" 238 " %zu > %" PRIu64, 239 cmdline_size, max_cmdline_size); 240 return; 241 } 242 243 strcpy(parm_area, ipl->cmdline); 244 } 245 } else { 246 ipl->start_addr = pentry; 247 } 248 249 if (ipl->initrd) { 250 ram_addr_t initrd_offset; 251 int initrd_size; 252 uint64_t *romptr; 253 254 initrd_offset = INITRD_START; 255 while (kernel_size + 0x100000 > initrd_offset) { 256 initrd_offset += 0x100000; 257 } 258 initrd_size = load_image_targphys(ipl->initrd, initrd_offset, 259 ms->ram_size - initrd_offset); 260 if (initrd_size == -1) { 261 error_setg(errp, "could not load initrd '%s'", ipl->initrd); 262 return; 263 } 264 265 /* 266 * we have to overwrite values in the kernel image, 267 * which are "rom" 268 */ 269 romptr = rom_ptr(INITRD_PARM_START, 16); 270 if (romptr) { 271 stq_be_p(romptr, initrd_offset); 272 stq_be_p(romptr + 1, initrd_size); 273 } 274 } 275 } 276 /* 277 * Don't ever use the migrated values, they could come from a different 278 * BIOS and therefore don't work. But still migrate the values, so 279 * QEMUs relying on it don't break. 280 */ 281 ipl->compat_start_addr = ipl->start_addr; 282 ipl->compat_bios_start_addr = ipl->bios_start_addr; 283 /* 284 * Because this Device is not on any bus in the qbus tree (it is 285 * not a sysbus device and it's not on some other bus like a PCI 286 * bus) it will not be automatically reset by the 'reset the 287 * sysbus' hook registered by vl.c like most devices. So we must 288 * manually register a reset hook for it. 289 * TODO: there should be a better way to do this. 290 */ 291 qemu_register_reset(resettable_cold_reset_fn, dev); 292 } 293 294 static const Property s390_ipl_properties[] = { 295 DEFINE_PROP_STRING("kernel", S390IPLState, kernel), 296 DEFINE_PROP_STRING("initrd", S390IPLState, initrd), 297 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), 298 DEFINE_PROP_STRING("firmware", S390IPLState, firmware), 299 DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), 300 DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration, 301 true), 302 }; 303 304 static void s390_ipl_set_boot_menu(S390IPLState *ipl) 305 { 306 unsigned long splash_time = 0; 307 308 if (!get_boot_device(0)) { 309 if (current_machine->boot_config.has_menu && current_machine->boot_config.menu) { 310 error_report("boot menu requires a bootindex to be specified for " 311 "the IPL device"); 312 } 313 return; 314 } 315 316 switch (ipl->iplb.pbt) { 317 case S390_IPL_TYPE_CCW: 318 /* In the absence of -boot menu, use zipl parameters */ 319 if (!current_machine->boot_config.has_menu) { 320 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL; 321 return; 322 } 323 break; 324 case S390_IPL_TYPE_QEMU_SCSI: 325 break; 326 default: 327 if (current_machine->boot_config.has_menu && current_machine->boot_config.menu) { 328 error_report("boot menu is not supported for this device type"); 329 } 330 return; 331 } 332 333 if (!current_machine->boot_config.has_menu || !current_machine->boot_config.menu) { 334 return; 335 } 336 337 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD; 338 339 if (current_machine->boot_config.has_splash_time) { 340 splash_time = current_machine->boot_config.splash_time; 341 } 342 if (splash_time > 0xffffffff) { 343 error_report("splash-time is too large, forcing it to max value"); 344 ipl->qipl.boot_menu_timeout = 0xffffffff; 345 return; 346 } 347 348 ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time); 349 } 350 351 #define CCW_DEVTYPE_NONE 0x00 352 #define CCW_DEVTYPE_VIRTIO 0x01 353 #define CCW_DEVTYPE_VIRTIO_NET 0x02 354 #define CCW_DEVTYPE_SCSI 0x03 355 #define CCW_DEVTYPE_VFIO 0x04 356 357 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype) 358 { 359 CcwDevice *ccw_dev = NULL; 360 int tmp_dt = CCW_DEVTYPE_NONE; 361 362 if (dev_st) { 363 VirtIONet *virtio_net_dev = (VirtIONet *) 364 object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET); 365 VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *) 366 object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent), 367 TYPE_VIRTIO_CCW_DEVICE); 368 VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *) 369 object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW); 370 371 if (virtio_ccw_dev) { 372 ccw_dev = CCW_DEVICE(virtio_ccw_dev); 373 if (virtio_net_dev) { 374 tmp_dt = CCW_DEVTYPE_VIRTIO_NET; 375 } else { 376 tmp_dt = CCW_DEVTYPE_VIRTIO; 377 } 378 } else if (vfio_ccw_dev) { 379 ccw_dev = CCW_DEVICE(vfio_ccw_dev); 380 tmp_dt = CCW_DEVTYPE_VFIO; 381 } else { 382 SCSIDevice *sd = (SCSIDevice *) 383 object_dynamic_cast(OBJECT(dev_st), 384 TYPE_SCSI_DEVICE); 385 if (sd) { 386 SCSIBus *sbus = scsi_bus_from_device(sd); 387 VirtIODevice *vdev = (VirtIODevice *) 388 object_dynamic_cast(OBJECT(sbus->qbus.parent), 389 TYPE_VIRTIO_DEVICE); 390 if (vdev) { 391 ccw_dev = (CcwDevice *) 392 object_dynamic_cast(OBJECT(qdev_get_parent_bus(DEVICE(vdev))->parent), 393 TYPE_CCW_DEVICE); 394 if (ccw_dev) { 395 tmp_dt = CCW_DEVTYPE_SCSI; 396 } 397 } 398 } 399 } 400 } 401 if (devtype) { 402 *devtype = tmp_dt; 403 } 404 return ccw_dev; 405 } 406 407 static uint64_t s390_ipl_map_iplb_chain(IplParameterBlock *iplb_chain) 408 { 409 S390IPLState *ipl = get_ipl_device(); 410 uint16_t count = be16_to_cpu(ipl->qipl.chain_len); 411 uint64_t len = sizeof(IplParameterBlock) * count; 412 uint64_t chain_addr = find_iplb_chain_addr(ipl->bios_start_addr, count); 413 414 cpu_physical_memory_write(chain_addr, iplb_chain, len); 415 return chain_addr; 416 } 417 418 void s390_ipl_fmt_loadparm(uint8_t *loadparm, char *str, Error **errp) 419 { 420 /* Initialize the loadparm with spaces */ 421 memset(loadparm, ' ', LOADPARM_LEN); 422 qdev_prop_sanitize_s390x_loadparm(loadparm, str, errp); 423 } 424 425 void s390_ipl_convert_loadparm(char *ascii_lp, uint8_t *ebcdic_lp) 426 { 427 int i; 428 429 /* Initialize the loadparm with EBCDIC spaces (0x40) */ 430 memset(ebcdic_lp, '@', LOADPARM_LEN); 431 for (i = 0; i < LOADPARM_LEN && ascii_lp[i]; i++) { 432 ebcdic_lp[i] = ascii2ebcdic[(uint8_t) ascii_lp[i]]; 433 } 434 } 435 436 static bool s390_build_iplb(DeviceState *dev_st, IplParameterBlock *iplb) 437 { 438 CcwDevice *ccw_dev = NULL; 439 SCSIDevice *sd; 440 int devtype; 441 uint8_t *lp; 442 g_autofree void *scsi_lp = NULL; 443 444 /* 445 * Currently allow IPL only from CCW devices. 446 */ 447 ccw_dev = s390_get_ccw_device(dev_st, &devtype); 448 if (ccw_dev) { 449 lp = ccw_dev->loadparm; 450 451 switch (devtype) { 452 case CCW_DEVTYPE_SCSI: 453 sd = SCSI_DEVICE(dev_st); 454 scsi_lp = object_property_get_str(OBJECT(sd), "loadparm", NULL); 455 if (scsi_lp && strlen(scsi_lp) > 0) { 456 lp = scsi_lp; 457 } 458 iplb->len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN); 459 iplb->blk0_len = 460 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN); 461 iplb->pbt = S390_IPL_TYPE_QEMU_SCSI; 462 iplb->scsi.lun = cpu_to_be32(sd->lun); 463 iplb->scsi.target = cpu_to_be16(sd->id); 464 iplb->scsi.channel = cpu_to_be16(sd->channel); 465 iplb->scsi.devno = cpu_to_be16(ccw_dev->sch->devno); 466 iplb->scsi.ssid = ccw_dev->sch->ssid & 3; 467 break; 468 case CCW_DEVTYPE_VFIO: 469 iplb->len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 470 iplb->pbt = S390_IPL_TYPE_CCW; 471 iplb->ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 472 iplb->ccw.ssid = ccw_dev->sch->ssid & 3; 473 break; 474 case CCW_DEVTYPE_VIRTIO_NET: 475 case CCW_DEVTYPE_VIRTIO: 476 iplb->len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 477 iplb->blk0_len = 478 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN); 479 iplb->pbt = S390_IPL_TYPE_CCW; 480 iplb->ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 481 iplb->ccw.ssid = ccw_dev->sch->ssid & 3; 482 break; 483 } 484 485 /* If the device loadparm is empty use the global machine loadparm */ 486 if (memcmp(lp, NO_LOADPARM, 8) == 0) { 487 lp = S390_CCW_MACHINE(qdev_get_machine())->loadparm; 488 } 489 490 s390_ipl_convert_loadparm((char *)lp, iplb->loadparm); 491 iplb->flags |= DIAG308_FLAGS_LP_VALID; 492 493 return true; 494 } 495 496 return false; 497 } 498 499 void s390_rebuild_iplb(uint16_t dev_index, IplParameterBlock *iplb) 500 { 501 S390IPLState *ipl = get_ipl_device(); 502 uint16_t index; 503 index = ipl->rebuilt_iplb ? ipl->iplb_index : dev_index; 504 505 ipl->rebuilt_iplb = s390_build_iplb(get_boot_device(index), iplb); 506 ipl->iplb_index = index; 507 } 508 509 static bool s390_init_all_iplbs(S390IPLState *ipl) 510 { 511 int iplb_num = 0; 512 IplParameterBlock iplb_chain[7]; 513 DeviceState *dev_st = get_boot_device(0); 514 Object *machine = qdev_get_machine(); 515 516 /* 517 * Parse the boot devices. Generate an IPLB for only the first boot device 518 * which will later be set with DIAG308. 519 */ 520 if (!dev_st) { 521 ipl->qipl.chain_len = 0; 522 return false; 523 } 524 525 /* If no machine loadparm was defined fill it with spaces */ 526 if (memcmp(S390_CCW_MACHINE(machine)->loadparm, NO_LOADPARM, 8) == 0) { 527 object_property_set_str(machine, "loadparm", " ", NULL); 528 } 529 530 iplb_num = 1; 531 s390_build_iplb(dev_st, &ipl->iplb); 532 533 /* Index any fallback boot devices */ 534 while (get_boot_device(iplb_num)) { 535 iplb_num++; 536 } 537 538 if (iplb_num > MAX_BOOT_DEVS) { 539 warn_report("Excess boot devices defined! %d boot devices found, " 540 "but only the first %d will be considered.", 541 iplb_num, MAX_BOOT_DEVS); 542 543 iplb_num = MAX_BOOT_DEVS; 544 } 545 546 ipl->qipl.chain_len = cpu_to_be16(iplb_num - 1); 547 548 /* 549 * Build fallback IPLBs for any boot devices above index 0, up to a 550 * maximum amount as defined in ipl.h 551 */ 552 if (iplb_num > 1) { 553 /* Start at 1 because the IPLB for boot index 0 is not chained */ 554 for (int i = 1; i < iplb_num; i++) { 555 dev_st = get_boot_device(i); 556 s390_build_iplb(dev_st, &iplb_chain[i - 1]); 557 } 558 559 ipl->qipl.next_iplb = cpu_to_be64(s390_ipl_map_iplb_chain(iplb_chain)); 560 } 561 562 return iplb_num; 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 } 604 605 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 if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) { 632 /* use CPU 0 for full resets */ 633 ipl->reset_cpu_index = 0; 634 } else { 635 ipl->reset_cpu_index = cs->cpu_index; 636 } 637 638 ipl->reset_type = reset_type; 639 if (reset_type == S390_RESET_MODIFIED_CLEAR || 640 reset_type == S390_RESET_LOAD_NORMAL || 641 reset_type == S390_RESET_PV) { 642 /* ignore -no-reboot, send no event */ 643 qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET); 644 } else { 645 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 646 } 647 /* as this is triggered by a CPU, make sure to exit the loop */ 648 if (tcg_enabled()) { 649 cpu_loop_exit(cs); 650 } 651 } 652 653 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type) 654 { 655 S390IPLState *ipl = get_ipl_device(); 656 657 *cs = qemu_get_cpu(ipl->reset_cpu_index); 658 if (!*cs) { 659 /* use any CPU */ 660 *cs = first_cpu; 661 } 662 *reset_type = ipl->reset_type; 663 } 664 665 void s390_ipl_clear_reset_request(void) 666 { 667 S390IPLState *ipl = get_ipl_device(); 668 669 ipl->reset_type = S390_RESET_EXTERNAL; 670 /* use CPU 0 for full resets */ 671 ipl->reset_cpu_index = 0; 672 } 673 674 static void s390_ipl_prepare_qipl(S390CPU *cpu) 675 { 676 S390IPLState *ipl = get_ipl_device(); 677 uint8_t *addr; 678 uint64_t len = 4096; 679 680 addr = cpu_physical_memory_map(cpu->env.psa, &len, true); 681 if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) { 682 error_report("Cannot set QEMU IPL parameters"); 683 return; 684 } 685 memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters)); 686 cpu_physical_memory_unmap(addr, len, 1, len); 687 } 688 689 int s390_ipl_prepare_pv_header(Error **errp) 690 { 691 IplParameterBlock *ipib = s390_ipl_get_iplb_pv(); 692 IPLBlockPV *ipib_pv = &ipib->pv; 693 void *hdr = g_malloc(ipib_pv->pv_header_len); 694 int rc; 695 696 cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr, 697 ipib_pv->pv_header_len); 698 rc = s390_pv_set_sec_parms((uintptr_t)hdr, ipib_pv->pv_header_len, errp); 699 g_free(hdr); 700 return rc; 701 } 702 703 int s390_ipl_pv_unpack(void) 704 { 705 IplParameterBlock *ipib = s390_ipl_get_iplb_pv(); 706 IPLBlockPV *ipib_pv = &ipib->pv; 707 int i, rc = 0; 708 709 for (i = 0; i < ipib_pv->num_comp; i++) { 710 rc = s390_pv_unpack(ipib_pv->components[i].addr, 711 TARGET_PAGE_ALIGN(ipib_pv->components[i].size), 712 ipib_pv->components[i].tweak_pref); 713 if (rc) { 714 break; 715 } 716 } 717 return rc; 718 } 719 720 void s390_ipl_prepare_cpu(S390CPU *cpu) 721 { 722 S390IPLState *ipl = get_ipl_device(); 723 724 cpu->env.psw.addr = ipl->start_addr; 725 cpu->env.psw.mask = IPL_PSW_MASK; 726 727 if (!ipl->kernel || ipl->iplb_valid) { 728 cpu->env.psw.addr = ipl->bios_start_addr; 729 if (!ipl->iplb_valid) { 730 ipl->iplb_valid = s390_init_all_iplbs(ipl); 731 } else { 732 ipl->qipl.chain_len = 0; 733 } 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 device_class_set_legacy_reset(dc, 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) 775