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 "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 #include "exec/exec-all.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 IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) 50 51 static bool iplb_extended_needed(void *opaque) 52 { 53 S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL)); 54 55 return ipl->iplbext_migration; 56 } 57 58 static const VMStateDescription vmstate_iplb_extended = { 59 .name = "ipl/iplb_extended", 60 .version_id = 0, 61 .minimum_version_id = 0, 62 .needed = iplb_extended_needed, 63 .fields = (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 = (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*[]) { 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 = (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 = (MIN(ms->ram_size, 0x80000000U) - 0x200000) & ~0xffffUL; 149 150 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->firmware); 151 if (bios_filename == NULL) { 152 error_setg(errp, "could not find stage1 bootloader"); 153 return; 154 } 155 156 bios_size = load_elf(bios_filename, NULL, 157 bios_translate_addr, &fwbase, 158 &ipl->bios_start_addr, NULL, NULL, NULL, 1, 159 EM_S390, 0, 0); 160 if (bios_size > 0) { 161 /* Adjust ELF start address to final location */ 162 ipl->bios_start_addr += fwbase; 163 } else { 164 /* Try to load non-ELF file */ 165 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, 166 4096); 167 ipl->bios_start_addr = ZIPL_IMAGE_START; 168 } 169 g_free(bios_filename); 170 171 if (bios_size == -1) { 172 error_setg(errp, "could not load bootloader '%s'", ipl->firmware); 173 return; 174 } 175 176 /* default boot target is the bios */ 177 ipl->start_addr = ipl->bios_start_addr; 178 } 179 180 if (ipl->kernel) { 181 kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL, 182 &pentry, NULL, 183 NULL, NULL, 1, EM_S390, 0, 0); 184 if (kernel_size < 0) { 185 kernel_size = load_image_targphys(ipl->kernel, 0, ms->ram_size); 186 if (kernel_size < 0) { 187 error_setg(errp, "could not load kernel '%s'", ipl->kernel); 188 return; 189 } 190 /* if this is Linux use KERN_IMAGE_START */ 191 magic = rom_ptr(LINUX_MAGIC_ADDR, 6); 192 if (magic && !memcmp(magic, "S390EP", 6)) { 193 pentry = KERN_IMAGE_START; 194 } else { 195 /* if not Linux load the address of the (short) IPL PSW */ 196 ipl_psw = rom_ptr(4, 4); 197 if (ipl_psw) { 198 pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR; 199 } else { 200 error_setg(errp, "Could not get IPL PSW"); 201 return; 202 } 203 } 204 } 205 /* 206 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the 207 * kernel parameters here as well. Note: For old kernels (up to 3.2) 208 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL 209 * loader) and it won't work. For this case we force it to 0x10000, too. 210 */ 211 if (pentry == KERN_IMAGE_START || pentry == 0x800) { 212 size_t cmdline_size = strlen(ipl->cmdline) + 1; 213 char *parm_area = rom_ptr(KERN_PARM_AREA, cmdline_size); 214 215 ipl->start_addr = KERN_IMAGE_START; 216 /* Overwrite parameters in the kernel image, which are "rom" */ 217 if (parm_area) { 218 uint64_t max_cmdline_size = get_max_kernel_cmdline_size(); 219 220 if (cmdline_size > max_cmdline_size) { 221 error_setg(errp, 222 "kernel command line exceeds maximum size:" 223 " %zu > %" PRIu64, 224 cmdline_size, max_cmdline_size); 225 return; 226 } 227 228 strcpy(parm_area, ipl->cmdline); 229 } 230 } else { 231 ipl->start_addr = pentry; 232 } 233 234 if (ipl->initrd) { 235 ram_addr_t initrd_offset; 236 int initrd_size; 237 uint64_t *romptr; 238 239 initrd_offset = INITRD_START; 240 while (kernel_size + 0x100000 > initrd_offset) { 241 initrd_offset += 0x100000; 242 } 243 initrd_size = load_image_targphys(ipl->initrd, initrd_offset, 244 ms->ram_size - initrd_offset); 245 if (initrd_size == -1) { 246 error_setg(errp, "could not load initrd '%s'", ipl->initrd); 247 return; 248 } 249 250 /* 251 * we have to overwrite values in the kernel image, 252 * which are "rom" 253 */ 254 romptr = rom_ptr(INITRD_PARM_START, 16); 255 if (romptr) { 256 stq_p(romptr, initrd_offset); 257 stq_p(romptr + 1, initrd_size); 258 } 259 } 260 } 261 /* 262 * Don't ever use the migrated values, they could come from a different 263 * BIOS and therefore don't work. But still migrate the values, so 264 * QEMUs relying on it don't break. 265 */ 266 ipl->compat_start_addr = ipl->start_addr; 267 ipl->compat_bios_start_addr = ipl->bios_start_addr; 268 /* 269 * Because this Device is not on any bus in the qbus tree (it is 270 * not a sysbus device and it's not on some other bus like a PCI 271 * bus) it will not be automatically reset by the 'reset the 272 * sysbus' hook registered by vl.c like most devices. So we must 273 * manually register a reset hook for it. 274 * TODO: there should be a better way to do this. 275 */ 276 qemu_register_reset(resettable_cold_reset_fn, dev); 277 } 278 279 static Property s390_ipl_properties[] = { 280 DEFINE_PROP_STRING("kernel", S390IPLState, kernel), 281 DEFINE_PROP_STRING("initrd", S390IPLState, initrd), 282 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), 283 DEFINE_PROP_STRING("firmware", S390IPLState, firmware), 284 DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw), 285 DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), 286 DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration, 287 true), 288 DEFINE_PROP_END_OF_LIST(), 289 }; 290 291 static void s390_ipl_set_boot_menu(S390IPLState *ipl) 292 { 293 QemuOptsList *plist = qemu_find_opts("boot-opts"); 294 QemuOpts *opts = QTAILQ_FIRST(&plist->head); 295 const char *tmp; 296 unsigned long splash_time = 0; 297 298 if (!get_boot_device(0)) { 299 if (boot_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 (!qemu_opt_get(opts, "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 (boot_menu) { 318 error_report("boot menu is not supported for this device type"); 319 } 320 return; 321 } 322 323 if (!boot_menu) { 324 return; 325 } 326 327 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD; 328 329 tmp = qemu_opt_get(opts, "splash-time"); 330 331 if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) { 332 error_report("splash-time is invalid, forcing it to 0"); 333 ipl->qipl.boot_menu_timeout = 0; 334 return; 335 } 336 337 if (splash_time > 0xffffffff) { 338 error_report("splash-time is too large, forcing it to max value"); 339 ipl->qipl.boot_menu_timeout = 0xffffffff; 340 return; 341 } 342 343 ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time); 344 } 345 346 #define CCW_DEVTYPE_NONE 0x00 347 #define CCW_DEVTYPE_VIRTIO 0x01 348 #define CCW_DEVTYPE_VIRTIO_NET 0x02 349 #define CCW_DEVTYPE_SCSI 0x03 350 #define CCW_DEVTYPE_VFIO 0x04 351 352 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype) 353 { 354 CcwDevice *ccw_dev = NULL; 355 int tmp_dt = CCW_DEVTYPE_NONE; 356 357 if (dev_st) { 358 VirtIONet *virtio_net_dev = (VirtIONet *) 359 object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET); 360 VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *) 361 object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent), 362 TYPE_VIRTIO_CCW_DEVICE); 363 VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *) 364 object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW); 365 366 if (virtio_ccw_dev) { 367 ccw_dev = CCW_DEVICE(virtio_ccw_dev); 368 if (virtio_net_dev) { 369 tmp_dt = CCW_DEVTYPE_VIRTIO_NET; 370 } else { 371 tmp_dt = CCW_DEVTYPE_VIRTIO; 372 } 373 } else if (vfio_ccw_dev) { 374 ccw_dev = CCW_DEVICE(vfio_ccw_dev); 375 tmp_dt = CCW_DEVTYPE_VFIO; 376 } else { 377 SCSIDevice *sd = (SCSIDevice *) 378 object_dynamic_cast(OBJECT(dev_st), 379 TYPE_SCSI_DEVICE); 380 if (sd) { 381 SCSIBus *sbus = scsi_bus_from_device(sd); 382 VirtIODevice *vdev = (VirtIODevice *) 383 object_dynamic_cast(OBJECT(sbus->qbus.parent), 384 TYPE_VIRTIO_DEVICE); 385 if (vdev) { 386 ccw_dev = (CcwDevice *) 387 object_dynamic_cast(OBJECT(qdev_get_parent_bus(DEVICE(vdev))->parent), 388 TYPE_CCW_DEVICE); 389 if (ccw_dev) { 390 tmp_dt = CCW_DEVTYPE_SCSI; 391 } 392 } 393 } 394 } 395 } 396 if (devtype) { 397 *devtype = tmp_dt; 398 } 399 return ccw_dev; 400 } 401 402 static bool s390_gen_initial_iplb(S390IPLState *ipl) 403 { 404 DeviceState *dev_st; 405 CcwDevice *ccw_dev = NULL; 406 SCSIDevice *sd; 407 int devtype; 408 409 dev_st = get_boot_device(0); 410 if (dev_st) { 411 ccw_dev = s390_get_ccw_device(dev_st, &devtype); 412 } 413 414 /* 415 * Currently allow IPL only from CCW devices. 416 */ 417 if (ccw_dev) { 418 switch (devtype) { 419 case CCW_DEVTYPE_SCSI: 420 sd = SCSI_DEVICE(dev_st); 421 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN); 422 ipl->iplb.blk0_len = 423 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN); 424 ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI; 425 ipl->iplb.scsi.lun = cpu_to_be32(sd->lun); 426 ipl->iplb.scsi.target = cpu_to_be16(sd->id); 427 ipl->iplb.scsi.channel = cpu_to_be16(sd->channel); 428 ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno); 429 ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3; 430 break; 431 case CCW_DEVTYPE_VFIO: 432 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 433 ipl->iplb.pbt = S390_IPL_TYPE_CCW; 434 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 435 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3; 436 break; 437 case CCW_DEVTYPE_VIRTIO_NET: 438 ipl->netboot = true; 439 /* Fall through to CCW_DEVTYPE_VIRTIO case */ 440 case CCW_DEVTYPE_VIRTIO: 441 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 442 ipl->iplb.blk0_len = 443 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN); 444 ipl->iplb.pbt = S390_IPL_TYPE_CCW; 445 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 446 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3; 447 break; 448 } 449 450 if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) { 451 ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID; 452 } 453 454 return true; 455 } 456 457 return false; 458 } 459 460 int s390_ipl_set_loadparm(uint8_t *loadparm) 461 { 462 MachineState *machine = MACHINE(qdev_get_machine()); 463 char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL); 464 465 if (lp) { 466 int i; 467 468 /* lp is an uppercase string without leading/embedded spaces */ 469 for (i = 0; i < 8 && lp[i]; i++) { 470 loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]]; 471 } 472 473 if (i < 8) { 474 memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */ 475 } 476 477 g_free(lp); 478 return 0; 479 } 480 481 return -1; 482 } 483 484 static int load_netboot_image(Error **errp) 485 { 486 MachineState *ms = MACHINE(qdev_get_machine()); 487 S390IPLState *ipl = get_ipl_device(); 488 char *netboot_filename; 489 MemoryRegion *sysmem = get_system_memory(); 490 MemoryRegion *mr = NULL; 491 void *ram_ptr = NULL; 492 int img_size = -1; 493 494 mr = memory_region_find(sysmem, 0, 1).mr; 495 if (!mr) { 496 error_setg(errp, "Failed to find memory region at address 0"); 497 return -1; 498 } 499 500 ram_ptr = memory_region_get_ram_ptr(mr); 501 if (!ram_ptr) { 502 error_setg(errp, "No RAM found"); 503 goto unref_mr; 504 } 505 506 netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw); 507 if (netboot_filename == NULL) { 508 error_setg(errp, "Could not find network bootloader '%s'", 509 ipl->netboot_fw); 510 goto unref_mr; 511 } 512 513 img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL, 514 &ipl->start_addr, 515 NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL, 516 false); 517 518 if (img_size < 0) { 519 img_size = load_image_size(netboot_filename, ram_ptr, ms->ram_size); 520 ipl->start_addr = KERN_IMAGE_START; 521 } 522 523 if (img_size < 0) { 524 error_setg(errp, "Failed to load network bootloader"); 525 } 526 527 g_free(netboot_filename); 528 529 unref_mr: 530 memory_region_unref(mr); 531 return img_size; 532 } 533 534 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb, 535 int virtio_id) 536 { 537 uint8_t cssid; 538 uint8_t ssid; 539 uint16_t devno; 540 uint16_t schid; 541 SubchDev *sch = NULL; 542 543 if (iplb->pbt != S390_IPL_TYPE_CCW) { 544 return false; 545 } 546 547 devno = be16_to_cpu(iplb->ccw.devno); 548 ssid = iplb->ccw.ssid & 3; 549 550 for (schid = 0; schid < MAX_SCHID; schid++) { 551 for (cssid = 0; cssid < MAX_CSSID; cssid++) { 552 sch = css_find_subch(1, cssid, ssid, schid); 553 554 if (sch && sch->devno == devno) { 555 return sch->id.cu_model == virtio_id; 556 } 557 } 558 } 559 return false; 560 } 561 562 static bool is_virtio_net_device(IplParameterBlock *iplb) 563 { 564 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET); 565 } 566 567 static bool is_virtio_scsi_device(IplParameterBlock *iplb) 568 { 569 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI); 570 } 571 572 static void update_machine_ipl_properties(IplParameterBlock *iplb) 573 { 574 Object *machine = qdev_get_machine(); 575 Error *err = NULL; 576 577 /* Sync loadparm */ 578 if (iplb->flags & DIAG308_FLAGS_LP_VALID) { 579 uint8_t *ebcdic_loadparm = iplb->loadparm; 580 char ascii_loadparm[9]; 581 int i; 582 583 for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) { 584 ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]]; 585 } 586 ascii_loadparm[i] = 0; 587 object_property_set_str(machine, "loadparm", ascii_loadparm, &err); 588 } else { 589 object_property_set_str(machine, "loadparm", "", &err); 590 } 591 if (err) { 592 warn_report_err(err); 593 } 594 } 595 596 void s390_ipl_update_diag308(IplParameterBlock *iplb) 597 { 598 S390IPLState *ipl = get_ipl_device(); 599 600 /* 601 * The IPLB set and retrieved by subcodes 8/9 is completely 602 * separate from the one managed via subcodes 5/6. 603 */ 604 if (iplb->pbt == S390_IPL_TYPE_PV) { 605 ipl->iplb_pv = *iplb; 606 ipl->iplb_valid_pv = true; 607 } else { 608 ipl->iplb = *iplb; 609 ipl->iplb_valid = true; 610 } 611 ipl->netboot = is_virtio_net_device(iplb); 612 update_machine_ipl_properties(iplb); 613 } 614 615 IplParameterBlock *s390_ipl_get_iplb_pv(void) 616 { 617 S390IPLState *ipl = get_ipl_device(); 618 619 if (!ipl->iplb_valid_pv) { 620 return NULL; 621 } 622 return &ipl->iplb_pv; 623 } 624 625 IplParameterBlock *s390_ipl_get_iplb(void) 626 { 627 S390IPLState *ipl = get_ipl_device(); 628 629 if (!ipl->iplb_valid) { 630 return NULL; 631 } 632 return &ipl->iplb; 633 } 634 635 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type) 636 { 637 S390IPLState *ipl = get_ipl_device(); 638 639 if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) { 640 /* use CPU 0 for full resets */ 641 ipl->reset_cpu_index = 0; 642 } else { 643 ipl->reset_cpu_index = cs->cpu_index; 644 } 645 ipl->reset_type = reset_type; 646 647 if (reset_type == S390_RESET_REIPL && 648 ipl->iplb_valid && 649 !ipl->netboot && 650 ipl->iplb.pbt == S390_IPL_TYPE_CCW && 651 is_virtio_scsi_device(&ipl->iplb)) { 652 CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL); 653 654 if (ccw_dev && 655 cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno && 656 (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) { 657 /* 658 * this is the original boot device's SCSI 659 * so restore IPL parameter info from it 660 */ 661 ipl->iplb_valid = s390_gen_initial_iplb(ipl); 662 } 663 } 664 if (reset_type == S390_RESET_MODIFIED_CLEAR || 665 reset_type == S390_RESET_LOAD_NORMAL || 666 reset_type == S390_RESET_PV) { 667 /* ignore -no-reboot, send no event */ 668 qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET); 669 } else { 670 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 671 } 672 /* as this is triggered by a CPU, make sure to exit the loop */ 673 if (tcg_enabled()) { 674 cpu_loop_exit(cs); 675 } 676 } 677 678 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type) 679 { 680 S390IPLState *ipl = get_ipl_device(); 681 682 *cs = qemu_get_cpu(ipl->reset_cpu_index); 683 if (!*cs) { 684 /* use any CPU */ 685 *cs = first_cpu; 686 } 687 *reset_type = ipl->reset_type; 688 } 689 690 void s390_ipl_clear_reset_request(void) 691 { 692 S390IPLState *ipl = get_ipl_device(); 693 694 ipl->reset_type = S390_RESET_EXTERNAL; 695 /* use CPU 0 for full resets */ 696 ipl->reset_cpu_index = 0; 697 } 698 699 static void s390_ipl_prepare_qipl(S390CPU *cpu) 700 { 701 S390IPLState *ipl = get_ipl_device(); 702 uint8_t *addr; 703 uint64_t len = 4096; 704 705 addr = cpu_physical_memory_map(cpu->env.psa, &len, true); 706 if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) { 707 error_report("Cannot set QEMU IPL parameters"); 708 return; 709 } 710 memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters)); 711 cpu_physical_memory_unmap(addr, len, 1, len); 712 } 713 714 int s390_ipl_prepare_pv_header(void) 715 { 716 IplParameterBlock *ipib = s390_ipl_get_iplb_pv(); 717 IPLBlockPV *ipib_pv = &ipib->pv; 718 void *hdr = g_malloc(ipib_pv->pv_header_len); 719 int rc; 720 721 cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr, 722 ipib_pv->pv_header_len); 723 rc = s390_pv_set_sec_parms((uintptr_t)hdr, 724 ipib_pv->pv_header_len); 725 g_free(hdr); 726 return rc; 727 } 728 729 int s390_ipl_pv_unpack(void) 730 { 731 IplParameterBlock *ipib = s390_ipl_get_iplb_pv(); 732 IPLBlockPV *ipib_pv = &ipib->pv; 733 int i, rc = 0; 734 735 for (i = 0; i < ipib_pv->num_comp; i++) { 736 rc = s390_pv_unpack(ipib_pv->components[i].addr, 737 TARGET_PAGE_ALIGN(ipib_pv->components[i].size), 738 ipib_pv->components[i].tweak_pref); 739 if (rc) { 740 break; 741 } 742 } 743 return rc; 744 } 745 746 void s390_ipl_prepare_cpu(S390CPU *cpu) 747 { 748 S390IPLState *ipl = get_ipl_device(); 749 750 cpu->env.psw.addr = ipl->start_addr; 751 cpu->env.psw.mask = IPL_PSW_MASK; 752 753 if (!ipl->kernel || ipl->iplb_valid) { 754 cpu->env.psw.addr = ipl->bios_start_addr; 755 if (!ipl->iplb_valid) { 756 ipl->iplb_valid = s390_gen_initial_iplb(ipl); 757 } 758 } 759 if (ipl->netboot) { 760 load_netboot_image(&error_fatal); 761 ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr); 762 } 763 s390_ipl_set_boot_menu(ipl); 764 s390_ipl_prepare_qipl(cpu); 765 } 766 767 static void s390_ipl_reset(DeviceState *dev) 768 { 769 S390IPLState *ipl = S390_IPL(dev); 770 771 if (ipl->reset_type != S390_RESET_REIPL) { 772 ipl->iplb_valid = false; 773 memset(&ipl->iplb, 0, sizeof(IplParameterBlock)); 774 } 775 } 776 777 static void s390_ipl_class_init(ObjectClass *klass, void *data) 778 { 779 DeviceClass *dc = DEVICE_CLASS(klass); 780 781 dc->realize = s390_ipl_realize; 782 device_class_set_props(dc, s390_ipl_properties); 783 dc->reset = s390_ipl_reset; 784 dc->vmsd = &vmstate_ipl; 785 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 786 /* Reason: Loads the ROMs and thus can only be used one time - internally */ 787 dc->user_creatable = false; 788 } 789 790 static const TypeInfo s390_ipl_info = { 791 .class_init = s390_ipl_class_init, 792 .parent = TYPE_DEVICE, 793 .name = TYPE_S390_IPL, 794 .instance_size = sizeof(S390IPLState), 795 }; 796 797 static void s390_ipl_register_types(void) 798 { 799 type_register_static(&s390_ipl_info); 800 } 801 802 type_init(s390_ipl_register_types) 803