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 "standard-headers/linux/virtio_ids.h" 38 39 #define KERN_IMAGE_START 0x010000UL 40 #define LINUX_MAGIC_ADDR 0x010008UL 41 #define KERN_PARM_AREA_SIZE_ADDR 0x010430UL 42 #define KERN_PARM_AREA 0x010480UL 43 #define LEGACY_KERN_PARM_AREA_SIZE 0x000380UL 44 #define INITRD_START 0x800000UL 45 #define INITRD_PARM_START 0x010408UL 46 #define PARMFILE_START 0x001000UL 47 #define ZIPL_IMAGE_START 0x009000UL 48 #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) 49 50 static bool iplb_extended_needed(void *opaque) 51 { 52 S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL)); 53 54 return ipl->iplbext_migration; 55 } 56 57 static const VMStateDescription vmstate_iplb_extended = { 58 .name = "ipl/iplb_extended", 59 .version_id = 0, 60 .minimum_version_id = 0, 61 .needed = iplb_extended_needed, 62 .fields = (const VMStateField[]) { 63 VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200), 64 VMSTATE_END_OF_LIST() 65 } 66 }; 67 68 static const VMStateDescription vmstate_iplb = { 69 .name = "ipl/iplb", 70 .version_id = 0, 71 .minimum_version_id = 0, 72 .fields = (const VMStateField[]) { 73 VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110), 74 VMSTATE_UINT16(devno, IplParameterBlock), 75 VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88), 76 VMSTATE_END_OF_LIST() 77 }, 78 .subsections = (const VMStateDescription * const []) { 79 &vmstate_iplb_extended, 80 NULL 81 } 82 }; 83 84 static const VMStateDescription vmstate_ipl = { 85 .name = "ipl", 86 .version_id = 0, 87 .minimum_version_id = 0, 88 .fields = (const VMStateField[]) { 89 VMSTATE_UINT64(compat_start_addr, S390IPLState), 90 VMSTATE_UINT64(compat_bios_start_addr, S390IPLState), 91 VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock), 92 VMSTATE_BOOL(iplb_valid, S390IPLState), 93 VMSTATE_UINT8(cssid, S390IPLState), 94 VMSTATE_UINT8(ssid, S390IPLState), 95 VMSTATE_UINT16(devno, S390IPLState), 96 VMSTATE_END_OF_LIST() 97 } 98 }; 99 100 static S390IPLState *get_ipl_device(void) 101 { 102 return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL)); 103 } 104 105 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr) 106 { 107 uint64_t dstaddr = *(uint64_t *) opaque; 108 /* 109 * Assuming that our s390-ccw.img was linked for starting at address 0, 110 * we can simply add the destination address for the final location 111 */ 112 return srcaddr + dstaddr; 113 } 114 115 static uint64_t get_max_kernel_cmdline_size(void) 116 { 117 uint64_t *size_ptr = rom_ptr(KERN_PARM_AREA_SIZE_ADDR, sizeof(*size_ptr)); 118 119 if (size_ptr) { 120 uint64_t size; 121 122 size = be64_to_cpu(*size_ptr); 123 if (size) { 124 return size; 125 } 126 } 127 return LEGACY_KERN_PARM_AREA_SIZE; 128 } 129 130 static void s390_ipl_realize(DeviceState *dev, Error **errp) 131 { 132 MachineState *ms = MACHINE(qdev_get_machine()); 133 S390IPLState *ipl = S390_IPL(dev); 134 uint32_t *ipl_psw; 135 uint64_t pentry; 136 char *magic; 137 int kernel_size; 138 139 int bios_size; 140 char *bios_filename; 141 142 /* 143 * Always load the bios if it was enforced, 144 * even if an external kernel has been defined. 145 */ 146 if (!ipl->kernel || ipl->enforce_bios) { 147 uint64_t fwbase = (MIN(ms->ram_size, 0x80000000U) - 0x200000) & ~0xffffUL; 148 149 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->firmware); 150 if (bios_filename == NULL) { 151 error_setg(errp, "could not find stage1 bootloader"); 152 return; 153 } 154 155 bios_size = load_elf(bios_filename, NULL, 156 bios_translate_addr, &fwbase, 157 &ipl->bios_start_addr, NULL, NULL, NULL, 1, 158 EM_S390, 0, 0); 159 if (bios_size > 0) { 160 /* Adjust ELF start address to final location */ 161 ipl->bios_start_addr += fwbase; 162 } else { 163 /* Try to load non-ELF file */ 164 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, 165 4096); 166 ipl->bios_start_addr = ZIPL_IMAGE_START; 167 } 168 g_free(bios_filename); 169 170 if (bios_size == -1) { 171 error_setg(errp, "could not load bootloader '%s'", ipl->firmware); 172 return; 173 } 174 175 /* default boot target is the bios */ 176 ipl->start_addr = ipl->bios_start_addr; 177 } 178 179 if (ipl->kernel) { 180 kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL, 181 &pentry, NULL, 182 NULL, NULL, 1, EM_S390, 0, 0); 183 if (kernel_size < 0) { 184 kernel_size = load_image_targphys(ipl->kernel, 0, ms->ram_size); 185 if (kernel_size < 0) { 186 error_setg(errp, "could not load kernel '%s'", ipl->kernel); 187 return; 188 } 189 /* if this is Linux use KERN_IMAGE_START */ 190 magic = rom_ptr(LINUX_MAGIC_ADDR, 6); 191 if (magic && !memcmp(magic, "S390EP", 6)) { 192 pentry = KERN_IMAGE_START; 193 } else { 194 /* if not Linux load the address of the (short) IPL PSW */ 195 ipl_psw = rom_ptr(4, 4); 196 if (ipl_psw) { 197 pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR; 198 } else { 199 error_setg(errp, "Could not get IPL PSW"); 200 return; 201 } 202 } 203 } 204 /* 205 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the 206 * kernel parameters here as well. Note: For old kernels (up to 3.2) 207 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL 208 * loader) and it won't work. For this case we force it to 0x10000, too. 209 */ 210 if (pentry == KERN_IMAGE_START || pentry == 0x800) { 211 size_t cmdline_size = strlen(ipl->cmdline) + 1; 212 char *parm_area = rom_ptr(KERN_PARM_AREA, cmdline_size); 213 214 ipl->start_addr = KERN_IMAGE_START; 215 /* Overwrite parameters in the kernel image, which are "rom" */ 216 if (parm_area) { 217 uint64_t max_cmdline_size = get_max_kernel_cmdline_size(); 218 219 if (cmdline_size > max_cmdline_size) { 220 error_setg(errp, 221 "kernel command line exceeds maximum size:" 222 " %zu > %" PRIu64, 223 cmdline_size, max_cmdline_size); 224 return; 225 } 226 227 strcpy(parm_area, ipl->cmdline); 228 } 229 } else { 230 ipl->start_addr = pentry; 231 } 232 233 if (ipl->initrd) { 234 ram_addr_t initrd_offset; 235 int initrd_size; 236 uint64_t *romptr; 237 238 initrd_offset = INITRD_START; 239 while (kernel_size + 0x100000 > initrd_offset) { 240 initrd_offset += 0x100000; 241 } 242 initrd_size = load_image_targphys(ipl->initrd, initrd_offset, 243 ms->ram_size - initrd_offset); 244 if (initrd_size == -1) { 245 error_setg(errp, "could not load initrd '%s'", ipl->initrd); 246 return; 247 } 248 249 /* 250 * we have to overwrite values in the kernel image, 251 * which are "rom" 252 */ 253 romptr = rom_ptr(INITRD_PARM_START, 16); 254 if (romptr) { 255 stq_p(romptr, initrd_offset); 256 stq_p(romptr + 1, initrd_size); 257 } 258 } 259 } 260 /* 261 * Don't ever use the migrated values, they could come from a different 262 * BIOS and therefore don't work. But still migrate the values, so 263 * QEMUs relying on it don't break. 264 */ 265 ipl->compat_start_addr = ipl->start_addr; 266 ipl->compat_bios_start_addr = ipl->bios_start_addr; 267 /* 268 * Because this Device is not on any bus in the qbus tree (it is 269 * not a sysbus device and it's not on some other bus like a PCI 270 * bus) it will not be automatically reset by the 'reset the 271 * sysbus' hook registered by vl.c like most devices. So we must 272 * manually register a reset hook for it. 273 * TODO: there should be a better way to do this. 274 */ 275 qemu_register_reset(resettable_cold_reset_fn, dev); 276 } 277 278 static Property s390_ipl_properties[] = { 279 DEFINE_PROP_STRING("kernel", S390IPLState, kernel), 280 DEFINE_PROP_STRING("initrd", S390IPLState, initrd), 281 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), 282 DEFINE_PROP_STRING("firmware", S390IPLState, firmware), 283 DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw), 284 DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), 285 DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration, 286 true), 287 DEFINE_PROP_END_OF_LIST(), 288 }; 289 290 static void s390_ipl_set_boot_menu(S390IPLState *ipl) 291 { 292 unsigned long splash_time = 0; 293 294 if (!get_boot_device(0)) { 295 if (current_machine->boot_config.has_menu && current_machine->boot_config.menu) { 296 error_report("boot menu requires a bootindex to be specified for " 297 "the IPL device"); 298 } 299 return; 300 } 301 302 switch (ipl->iplb.pbt) { 303 case S390_IPL_TYPE_CCW: 304 /* In the absence of -boot menu, use zipl parameters */ 305 if (!current_machine->boot_config.has_menu) { 306 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL; 307 return; 308 } 309 break; 310 case S390_IPL_TYPE_QEMU_SCSI: 311 break; 312 default: 313 if (current_machine->boot_config.has_menu && current_machine->boot_config.menu) { 314 error_report("boot menu is not supported for this device type"); 315 } 316 return; 317 } 318 319 if (!current_machine->boot_config.has_menu || !current_machine->boot_config.menu) { 320 return; 321 } 322 323 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD; 324 325 if (current_machine->boot_config.has_splash_time) { 326 splash_time = current_machine->boot_config.splash_time; 327 } 328 if (splash_time > 0xffffffff) { 329 error_report("splash-time is too large, forcing it to max value"); 330 ipl->qipl.boot_menu_timeout = 0xffffffff; 331 return; 332 } 333 334 ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time); 335 } 336 337 #define CCW_DEVTYPE_NONE 0x00 338 #define CCW_DEVTYPE_VIRTIO 0x01 339 #define CCW_DEVTYPE_VIRTIO_NET 0x02 340 #define CCW_DEVTYPE_SCSI 0x03 341 #define CCW_DEVTYPE_VFIO 0x04 342 343 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype) 344 { 345 CcwDevice *ccw_dev = NULL; 346 int tmp_dt = CCW_DEVTYPE_NONE; 347 348 if (dev_st) { 349 VirtIONet *virtio_net_dev = (VirtIONet *) 350 object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET); 351 VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *) 352 object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent), 353 TYPE_VIRTIO_CCW_DEVICE); 354 VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *) 355 object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW); 356 357 if (virtio_ccw_dev) { 358 ccw_dev = CCW_DEVICE(virtio_ccw_dev); 359 if (virtio_net_dev) { 360 tmp_dt = CCW_DEVTYPE_VIRTIO_NET; 361 } else { 362 tmp_dt = CCW_DEVTYPE_VIRTIO; 363 } 364 } else if (vfio_ccw_dev) { 365 ccw_dev = CCW_DEVICE(vfio_ccw_dev); 366 tmp_dt = CCW_DEVTYPE_VFIO; 367 } else { 368 SCSIDevice *sd = (SCSIDevice *) 369 object_dynamic_cast(OBJECT(dev_st), 370 TYPE_SCSI_DEVICE); 371 if (sd) { 372 SCSIBus *sbus = scsi_bus_from_device(sd); 373 VirtIODevice *vdev = (VirtIODevice *) 374 object_dynamic_cast(OBJECT(sbus->qbus.parent), 375 TYPE_VIRTIO_DEVICE); 376 if (vdev) { 377 ccw_dev = (CcwDevice *) 378 object_dynamic_cast(OBJECT(qdev_get_parent_bus(DEVICE(vdev))->parent), 379 TYPE_CCW_DEVICE); 380 if (ccw_dev) { 381 tmp_dt = CCW_DEVTYPE_SCSI; 382 } 383 } 384 } 385 } 386 } 387 if (devtype) { 388 *devtype = tmp_dt; 389 } 390 return ccw_dev; 391 } 392 393 static bool s390_gen_initial_iplb(S390IPLState *ipl) 394 { 395 DeviceState *dev_st; 396 CcwDevice *ccw_dev = NULL; 397 SCSIDevice *sd; 398 int devtype; 399 400 dev_st = get_boot_device(0); 401 if (dev_st) { 402 ccw_dev = s390_get_ccw_device(dev_st, &devtype); 403 } 404 405 /* 406 * Currently allow IPL only from CCW devices. 407 */ 408 if (ccw_dev) { 409 switch (devtype) { 410 case CCW_DEVTYPE_SCSI: 411 sd = SCSI_DEVICE(dev_st); 412 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN); 413 ipl->iplb.blk0_len = 414 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN); 415 ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI; 416 ipl->iplb.scsi.lun = cpu_to_be32(sd->lun); 417 ipl->iplb.scsi.target = cpu_to_be16(sd->id); 418 ipl->iplb.scsi.channel = cpu_to_be16(sd->channel); 419 ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno); 420 ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3; 421 break; 422 case CCW_DEVTYPE_VFIO: 423 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 424 ipl->iplb.pbt = S390_IPL_TYPE_CCW; 425 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 426 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3; 427 break; 428 case CCW_DEVTYPE_VIRTIO_NET: 429 ipl->netboot = true; 430 /* Fall through to CCW_DEVTYPE_VIRTIO case */ 431 case CCW_DEVTYPE_VIRTIO: 432 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 433 ipl->iplb.blk0_len = 434 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN); 435 ipl->iplb.pbt = S390_IPL_TYPE_CCW; 436 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 437 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3; 438 break; 439 } 440 441 if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) { 442 ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID; 443 } 444 445 return true; 446 } 447 448 return false; 449 } 450 451 int s390_ipl_set_loadparm(uint8_t *loadparm) 452 { 453 MachineState *machine = MACHINE(qdev_get_machine()); 454 char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL); 455 456 if (lp) { 457 int i; 458 459 /* lp is an uppercase string without leading/embedded spaces */ 460 for (i = 0; i < 8 && lp[i]; i++) { 461 loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]]; 462 } 463 464 if (i < 8) { 465 memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */ 466 } 467 468 g_free(lp); 469 return 0; 470 } 471 472 return -1; 473 } 474 475 static int load_netboot_image(Error **errp) 476 { 477 MachineState *ms = MACHINE(qdev_get_machine()); 478 S390IPLState *ipl = get_ipl_device(); 479 char *netboot_filename; 480 MemoryRegion *sysmem = get_system_memory(); 481 MemoryRegion *mr = NULL; 482 void *ram_ptr = NULL; 483 int img_size = -1; 484 485 mr = memory_region_find(sysmem, 0, 1).mr; 486 if (!mr) { 487 error_setg(errp, "Failed to find memory region at address 0"); 488 return -1; 489 } 490 491 ram_ptr = memory_region_get_ram_ptr(mr); 492 if (!ram_ptr) { 493 error_setg(errp, "No RAM found"); 494 goto unref_mr; 495 } 496 497 netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw); 498 if (netboot_filename == NULL) { 499 error_setg(errp, "Could not find network bootloader '%s'", 500 ipl->netboot_fw); 501 goto unref_mr; 502 } 503 504 img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL, 505 &ipl->start_addr, 506 NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL, 507 false); 508 509 if (img_size < 0) { 510 img_size = load_image_size(netboot_filename, ram_ptr, ms->ram_size); 511 ipl->start_addr = KERN_IMAGE_START; 512 } 513 514 if (img_size < 0) { 515 error_setg(errp, "Failed to load network bootloader"); 516 } 517 518 g_free(netboot_filename); 519 520 unref_mr: 521 memory_region_unref(mr); 522 return img_size; 523 } 524 525 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb, 526 int virtio_id) 527 { 528 uint8_t cssid; 529 uint8_t ssid; 530 uint16_t devno; 531 uint16_t schid; 532 SubchDev *sch = NULL; 533 534 if (iplb->pbt != S390_IPL_TYPE_CCW) { 535 return false; 536 } 537 538 devno = be16_to_cpu(iplb->ccw.devno); 539 ssid = iplb->ccw.ssid & 3; 540 541 for (schid = 0; schid < MAX_SCHID; schid++) { 542 for (cssid = 0; cssid < MAX_CSSID; cssid++) { 543 sch = css_find_subch(1, cssid, ssid, schid); 544 545 if (sch && sch->devno == devno) { 546 return sch->id.cu_model == virtio_id; 547 } 548 } 549 } 550 return false; 551 } 552 553 static bool is_virtio_net_device(IplParameterBlock *iplb) 554 { 555 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET); 556 } 557 558 static bool is_virtio_scsi_device(IplParameterBlock *iplb) 559 { 560 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI); 561 } 562 563 static void update_machine_ipl_properties(IplParameterBlock *iplb) 564 { 565 Object *machine = qdev_get_machine(); 566 Error *err = NULL; 567 568 /* Sync loadparm */ 569 if (iplb->flags & DIAG308_FLAGS_LP_VALID) { 570 uint8_t *ebcdic_loadparm = iplb->loadparm; 571 char ascii_loadparm[9]; 572 int i; 573 574 for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) { 575 ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]]; 576 } 577 ascii_loadparm[i] = 0; 578 object_property_set_str(machine, "loadparm", ascii_loadparm, &err); 579 } else { 580 object_property_set_str(machine, "loadparm", "", &err); 581 } 582 if (err) { 583 warn_report_err(err); 584 } 585 } 586 587 void s390_ipl_update_diag308(IplParameterBlock *iplb) 588 { 589 S390IPLState *ipl = get_ipl_device(); 590 591 /* 592 * The IPLB set and retrieved by subcodes 8/9 is completely 593 * separate from the one managed via subcodes 5/6. 594 */ 595 if (iplb->pbt == S390_IPL_TYPE_PV) { 596 ipl->iplb_pv = *iplb; 597 ipl->iplb_valid_pv = true; 598 } else { 599 ipl->iplb = *iplb; 600 ipl->iplb_valid = true; 601 } 602 ipl->netboot = is_virtio_net_device(iplb); 603 update_machine_ipl_properties(iplb); 604 } 605 606 IplParameterBlock *s390_ipl_get_iplb_pv(void) 607 { 608 S390IPLState *ipl = get_ipl_device(); 609 610 if (!ipl->iplb_valid_pv) { 611 return NULL; 612 } 613 return &ipl->iplb_pv; 614 } 615 616 IplParameterBlock *s390_ipl_get_iplb(void) 617 { 618 S390IPLState *ipl = get_ipl_device(); 619 620 if (!ipl->iplb_valid) { 621 return NULL; 622 } 623 return &ipl->iplb; 624 } 625 626 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type) 627 { 628 S390IPLState *ipl = get_ipl_device(); 629 630 if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) { 631 /* use CPU 0 for full resets */ 632 ipl->reset_cpu_index = 0; 633 } else { 634 ipl->reset_cpu_index = cs->cpu_index; 635 } 636 ipl->reset_type = reset_type; 637 638 if (reset_type == S390_RESET_REIPL && 639 ipl->iplb_valid && 640 !ipl->netboot && 641 ipl->iplb.pbt == S390_IPL_TYPE_CCW && 642 is_virtio_scsi_device(&ipl->iplb)) { 643 CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL); 644 645 if (ccw_dev && 646 cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno && 647 (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) { 648 /* 649 * this is the original boot device's SCSI 650 * so restore IPL parameter info from it 651 */ 652 ipl->iplb_valid = s390_gen_initial_iplb(ipl); 653 } 654 } 655 if (reset_type == S390_RESET_MODIFIED_CLEAR || 656 reset_type == S390_RESET_LOAD_NORMAL || 657 reset_type == S390_RESET_PV) { 658 /* ignore -no-reboot, send no event */ 659 qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET); 660 } else { 661 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 662 } 663 /* as this is triggered by a CPU, make sure to exit the loop */ 664 if (tcg_enabled()) { 665 cpu_loop_exit(cs); 666 } 667 } 668 669 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type) 670 { 671 S390IPLState *ipl = get_ipl_device(); 672 673 *cs = qemu_get_cpu(ipl->reset_cpu_index); 674 if (!*cs) { 675 /* use any CPU */ 676 *cs = first_cpu; 677 } 678 *reset_type = ipl->reset_type; 679 } 680 681 void s390_ipl_clear_reset_request(void) 682 { 683 S390IPLState *ipl = get_ipl_device(); 684 685 ipl->reset_type = S390_RESET_EXTERNAL; 686 /* use CPU 0 for full resets */ 687 ipl->reset_cpu_index = 0; 688 } 689 690 static void s390_ipl_prepare_qipl(S390CPU *cpu) 691 { 692 S390IPLState *ipl = get_ipl_device(); 693 uint8_t *addr; 694 uint64_t len = 4096; 695 696 addr = cpu_physical_memory_map(cpu->env.psa, &len, true); 697 if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) { 698 error_report("Cannot set QEMU IPL parameters"); 699 return; 700 } 701 memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters)); 702 cpu_physical_memory_unmap(addr, len, 1, len); 703 } 704 705 int s390_ipl_prepare_pv_header(Error **errp) 706 { 707 IplParameterBlock *ipib = s390_ipl_get_iplb_pv(); 708 IPLBlockPV *ipib_pv = &ipib->pv; 709 void *hdr = g_malloc(ipib_pv->pv_header_len); 710 int rc; 711 712 cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr, 713 ipib_pv->pv_header_len); 714 rc = s390_pv_set_sec_parms((uintptr_t)hdr, ipib_pv->pv_header_len, errp); 715 g_free(hdr); 716 return rc; 717 } 718 719 int s390_ipl_pv_unpack(void) 720 { 721 IplParameterBlock *ipib = s390_ipl_get_iplb_pv(); 722 IPLBlockPV *ipib_pv = &ipib->pv; 723 int i, rc = 0; 724 725 for (i = 0; i < ipib_pv->num_comp; i++) { 726 rc = s390_pv_unpack(ipib_pv->components[i].addr, 727 TARGET_PAGE_ALIGN(ipib_pv->components[i].size), 728 ipib_pv->components[i].tweak_pref); 729 if (rc) { 730 break; 731 } 732 } 733 return rc; 734 } 735 736 void s390_ipl_prepare_cpu(S390CPU *cpu) 737 { 738 S390IPLState *ipl = get_ipl_device(); 739 740 cpu->env.psw.addr = ipl->start_addr; 741 cpu->env.psw.mask = IPL_PSW_MASK; 742 743 if (!ipl->kernel || ipl->iplb_valid) { 744 cpu->env.psw.addr = ipl->bios_start_addr; 745 if (!ipl->iplb_valid) { 746 ipl->iplb_valid = s390_gen_initial_iplb(ipl); 747 } 748 } 749 if (ipl->netboot) { 750 load_netboot_image(&error_fatal); 751 ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr); 752 } 753 s390_ipl_set_boot_menu(ipl); 754 s390_ipl_prepare_qipl(cpu); 755 } 756 757 static void s390_ipl_reset(DeviceState *dev) 758 { 759 S390IPLState *ipl = S390_IPL(dev); 760 761 if (ipl->reset_type != S390_RESET_REIPL) { 762 ipl->iplb_valid = false; 763 memset(&ipl->iplb, 0, sizeof(IplParameterBlock)); 764 } 765 } 766 767 static void s390_ipl_class_init(ObjectClass *klass, void *data) 768 { 769 DeviceClass *dc = DEVICE_CLASS(klass); 770 771 dc->realize = s390_ipl_realize; 772 device_class_set_props(dc, s390_ipl_properties); 773 device_class_set_legacy_reset(dc, s390_ipl_reset); 774 dc->vmsd = &vmstate_ipl; 775 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 776 /* Reason: Loads the ROMs and thus can only be used one time - internally */ 777 dc->user_creatable = false; 778 } 779 780 static const TypeInfo s390_ipl_info = { 781 .class_init = s390_ipl_class_init, 782 .parent = TYPE_DEVICE, 783 .name = TYPE_S390_IPL, 784 .instance_size = sizeof(S390IPLState), 785 }; 786 787 static void s390_ipl_register_types(void) 788 { 789 type_register_static(&s390_ipl_info); 790 } 791 792 type_init(s390_ipl_register_types) 793