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-common.h" 17 #include "qemu/datadir.h" 18 #include "qapi/error.h" 19 #include "sysemu/reset.h" 20 #include "sysemu/runstate.h" 21 #include "sysemu/tcg.h" 22 #include "elf.h" 23 #include "hw/loader.h" 24 #include "hw/qdev-properties.h" 25 #include "hw/boards.h" 26 #include "hw/s390x/virtio-ccw.h" 27 #include "hw/s390x/vfio-ccw.h" 28 #include "hw/s390x/css.h" 29 #include "hw/s390x/ebcdic.h" 30 #include "hw/s390x/pv.h" 31 #include "ipl.h" 32 #include "qemu/error-report.h" 33 #include "qemu/config-file.h" 34 #include "qemu/cutils.h" 35 #include "qemu/option.h" 36 #include "exec/exec-all.h" 37 38 #define KERN_IMAGE_START 0x010000UL 39 #define LINUX_MAGIC_ADDR 0x010008UL 40 #define KERN_PARM_AREA 0x010480UL 41 #define INITRD_START 0x800000UL 42 #define INITRD_PARM_START 0x010408UL 43 #define PARMFILE_START 0x001000UL 44 #define ZIPL_IMAGE_START 0x009000UL 45 #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) 46 47 static bool iplb_extended_needed(void *opaque) 48 { 49 S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL)); 50 51 return ipl->iplbext_migration; 52 } 53 54 static const VMStateDescription vmstate_iplb_extended = { 55 .name = "ipl/iplb_extended", 56 .version_id = 0, 57 .minimum_version_id = 0, 58 .needed = iplb_extended_needed, 59 .fields = (VMStateField[]) { 60 VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200), 61 VMSTATE_END_OF_LIST() 62 } 63 }; 64 65 static const VMStateDescription vmstate_iplb = { 66 .name = "ipl/iplb", 67 .version_id = 0, 68 .minimum_version_id = 0, 69 .fields = (VMStateField[]) { 70 VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110), 71 VMSTATE_UINT16(devno, IplParameterBlock), 72 VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88), 73 VMSTATE_END_OF_LIST() 74 }, 75 .subsections = (const VMStateDescription*[]) { 76 &vmstate_iplb_extended, 77 NULL 78 } 79 }; 80 81 static const VMStateDescription vmstate_ipl = { 82 .name = "ipl", 83 .version_id = 0, 84 .minimum_version_id = 0, 85 .fields = (VMStateField[]) { 86 VMSTATE_UINT64(compat_start_addr, S390IPLState), 87 VMSTATE_UINT64(compat_bios_start_addr, S390IPLState), 88 VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock), 89 VMSTATE_BOOL(iplb_valid, S390IPLState), 90 VMSTATE_UINT8(cssid, S390IPLState), 91 VMSTATE_UINT8(ssid, S390IPLState), 92 VMSTATE_UINT16(devno, S390IPLState), 93 VMSTATE_END_OF_LIST() 94 } 95 }; 96 97 static S390IPLState *get_ipl_device(void) 98 { 99 return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL)); 100 } 101 102 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr) 103 { 104 uint64_t dstaddr = *(uint64_t *) opaque; 105 /* 106 * Assuming that our s390-ccw.img was linked for starting at address 0, 107 * we can simply add the destination address for the final location 108 */ 109 return srcaddr + dstaddr; 110 } 111 112 static void s390_ipl_realize(DeviceState *dev, Error **errp) 113 { 114 MachineState *ms = MACHINE(qdev_get_machine()); 115 S390IPLState *ipl = S390_IPL(dev); 116 uint32_t *ipl_psw; 117 uint64_t pentry; 118 char *magic; 119 int kernel_size; 120 121 int bios_size; 122 char *bios_filename; 123 124 /* 125 * Always load the bios if it was enforced, 126 * even if an external kernel has been defined. 127 */ 128 if (!ipl->kernel || ipl->enforce_bios) { 129 uint64_t fwbase = (MIN(ms->ram_size, 0x80000000U) - 0x200000) & ~0xffffUL; 130 131 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->firmware); 132 if (bios_filename == NULL) { 133 error_setg(errp, "could not find stage1 bootloader"); 134 return; 135 } 136 137 bios_size = load_elf(bios_filename, NULL, 138 bios_translate_addr, &fwbase, 139 &ipl->bios_start_addr, NULL, NULL, NULL, 1, 140 EM_S390, 0, 0); 141 if (bios_size > 0) { 142 /* Adjust ELF start address to final location */ 143 ipl->bios_start_addr += fwbase; 144 } else { 145 /* Try to load non-ELF file */ 146 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, 147 4096); 148 ipl->bios_start_addr = ZIPL_IMAGE_START; 149 } 150 g_free(bios_filename); 151 152 if (bios_size == -1) { 153 error_setg(errp, "could not load bootloader '%s'", ipl->firmware); 154 return; 155 } 156 157 /* default boot target is the bios */ 158 ipl->start_addr = ipl->bios_start_addr; 159 } 160 161 if (ipl->kernel) { 162 kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL, 163 &pentry, NULL, 164 NULL, NULL, 1, EM_S390, 0, 0); 165 if (kernel_size < 0) { 166 kernel_size = load_image_targphys(ipl->kernel, 0, ms->ram_size); 167 if (kernel_size < 0) { 168 error_setg(errp, "could not load kernel '%s'", ipl->kernel); 169 return; 170 } 171 /* if this is Linux use KERN_IMAGE_START */ 172 magic = rom_ptr(LINUX_MAGIC_ADDR, 6); 173 if (magic && !memcmp(magic, "S390EP", 6)) { 174 pentry = KERN_IMAGE_START; 175 } else { 176 /* if not Linux load the address of the (short) IPL PSW */ 177 ipl_psw = rom_ptr(4, 4); 178 if (ipl_psw) { 179 pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR; 180 } else { 181 error_setg(errp, "Could not get IPL PSW"); 182 return; 183 } 184 } 185 } 186 /* 187 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the 188 * kernel parameters here as well. Note: For old kernels (up to 3.2) 189 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL 190 * loader) and it won't work. For this case we force it to 0x10000, too. 191 */ 192 if (pentry == KERN_IMAGE_START || pentry == 0x800) { 193 char *parm_area = rom_ptr(KERN_PARM_AREA, strlen(ipl->cmdline) + 1); 194 ipl->start_addr = KERN_IMAGE_START; 195 /* Overwrite parameters in the kernel image, which are "rom" */ 196 if (parm_area) { 197 strcpy(parm_area, ipl->cmdline); 198 } 199 } else { 200 ipl->start_addr = pentry; 201 } 202 203 if (ipl->initrd) { 204 ram_addr_t initrd_offset; 205 int initrd_size; 206 uint64_t *romptr; 207 208 initrd_offset = INITRD_START; 209 while (kernel_size + 0x100000 > initrd_offset) { 210 initrd_offset += 0x100000; 211 } 212 initrd_size = load_image_targphys(ipl->initrd, initrd_offset, 213 ms->ram_size - initrd_offset); 214 if (initrd_size == -1) { 215 error_setg(errp, "could not load initrd '%s'", ipl->initrd); 216 return; 217 } 218 219 /* 220 * we have to overwrite values in the kernel image, 221 * which are "rom" 222 */ 223 romptr = rom_ptr(INITRD_PARM_START, 16); 224 if (romptr) { 225 stq_p(romptr, initrd_offset); 226 stq_p(romptr + 1, initrd_size); 227 } 228 } 229 } 230 /* 231 * Don't ever use the migrated values, they could come from a different 232 * BIOS and therefore don't work. But still migrate the values, so 233 * QEMUs relying on it don't break. 234 */ 235 ipl->compat_start_addr = ipl->start_addr; 236 ipl->compat_bios_start_addr = ipl->bios_start_addr; 237 /* 238 * Because this Device is not on any bus in the qbus tree (it is 239 * not a sysbus device and it's not on some other bus like a PCI 240 * bus) it will not be automatically reset by the 'reset the 241 * sysbus' hook registered by vl.c like most devices. So we must 242 * manually register a reset hook for it. 243 * TODO: there should be a better way to do this. 244 */ 245 qemu_register_reset(resettable_cold_reset_fn, dev); 246 } 247 248 static Property s390_ipl_properties[] = { 249 DEFINE_PROP_STRING("kernel", S390IPLState, kernel), 250 DEFINE_PROP_STRING("initrd", S390IPLState, initrd), 251 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), 252 DEFINE_PROP_STRING("firmware", S390IPLState, firmware), 253 DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw), 254 DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), 255 DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration, 256 true), 257 DEFINE_PROP_END_OF_LIST(), 258 }; 259 260 static void s390_ipl_set_boot_menu(S390IPLState *ipl) 261 { 262 QemuOptsList *plist = qemu_find_opts("boot-opts"); 263 QemuOpts *opts = QTAILQ_FIRST(&plist->head); 264 const char *tmp; 265 unsigned long splash_time = 0; 266 267 if (!get_boot_device(0)) { 268 if (boot_menu) { 269 error_report("boot menu requires a bootindex to be specified for " 270 "the IPL device"); 271 } 272 return; 273 } 274 275 switch (ipl->iplb.pbt) { 276 case S390_IPL_TYPE_CCW: 277 /* In the absence of -boot menu, use zipl parameters */ 278 if (!qemu_opt_get(opts, "menu")) { 279 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL; 280 return; 281 } 282 break; 283 case S390_IPL_TYPE_QEMU_SCSI: 284 break; 285 default: 286 if (boot_menu) { 287 error_report("boot menu is not supported for this device type"); 288 } 289 return; 290 } 291 292 if (!boot_menu) { 293 return; 294 } 295 296 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD; 297 298 tmp = qemu_opt_get(opts, "splash-time"); 299 300 if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) { 301 error_report("splash-time is invalid, forcing it to 0"); 302 ipl->qipl.boot_menu_timeout = 0; 303 return; 304 } 305 306 if (splash_time > 0xffffffff) { 307 error_report("splash-time is too large, forcing it to max value"); 308 ipl->qipl.boot_menu_timeout = 0xffffffff; 309 return; 310 } 311 312 ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time); 313 } 314 315 #define CCW_DEVTYPE_NONE 0x00 316 #define CCW_DEVTYPE_VIRTIO 0x01 317 #define CCW_DEVTYPE_VIRTIO_NET 0x02 318 #define CCW_DEVTYPE_SCSI 0x03 319 #define CCW_DEVTYPE_VFIO 0x04 320 321 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype) 322 { 323 CcwDevice *ccw_dev = NULL; 324 int tmp_dt = CCW_DEVTYPE_NONE; 325 326 if (dev_st) { 327 VirtIONet *virtio_net_dev = (VirtIONet *) 328 object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET); 329 VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *) 330 object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent), 331 TYPE_VIRTIO_CCW_DEVICE); 332 VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *) 333 object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW); 334 335 if (virtio_ccw_dev) { 336 ccw_dev = CCW_DEVICE(virtio_ccw_dev); 337 if (virtio_net_dev) { 338 tmp_dt = CCW_DEVTYPE_VIRTIO_NET; 339 } else { 340 tmp_dt = CCW_DEVTYPE_VIRTIO; 341 } 342 } else if (vfio_ccw_dev) { 343 ccw_dev = CCW_DEVICE(vfio_ccw_dev); 344 tmp_dt = CCW_DEVTYPE_VFIO; 345 } else { 346 SCSIDevice *sd = (SCSIDevice *) 347 object_dynamic_cast(OBJECT(dev_st), 348 TYPE_SCSI_DEVICE); 349 if (sd) { 350 SCSIBus *bus = scsi_bus_from_device(sd); 351 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus); 352 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw, 353 vdev); 354 355 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw), 356 TYPE_CCW_DEVICE); 357 tmp_dt = CCW_DEVTYPE_SCSI; 358 } 359 } 360 } 361 if (devtype) { 362 *devtype = tmp_dt; 363 } 364 return ccw_dev; 365 } 366 367 static bool s390_gen_initial_iplb(S390IPLState *ipl) 368 { 369 DeviceState *dev_st; 370 CcwDevice *ccw_dev = NULL; 371 SCSIDevice *sd; 372 int devtype; 373 374 dev_st = get_boot_device(0); 375 if (dev_st) { 376 ccw_dev = s390_get_ccw_device(dev_st, &devtype); 377 } 378 379 /* 380 * Currently allow IPL only from CCW devices. 381 */ 382 if (ccw_dev) { 383 switch (devtype) { 384 case CCW_DEVTYPE_SCSI: 385 sd = SCSI_DEVICE(dev_st); 386 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN); 387 ipl->iplb.blk0_len = 388 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN); 389 ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI; 390 ipl->iplb.scsi.lun = cpu_to_be32(sd->lun); 391 ipl->iplb.scsi.target = cpu_to_be16(sd->id); 392 ipl->iplb.scsi.channel = cpu_to_be16(sd->channel); 393 ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno); 394 ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3; 395 break; 396 case CCW_DEVTYPE_VFIO: 397 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 398 ipl->iplb.pbt = S390_IPL_TYPE_CCW; 399 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 400 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3; 401 break; 402 case CCW_DEVTYPE_VIRTIO_NET: 403 ipl->netboot = true; 404 /* Fall through to CCW_DEVTYPE_VIRTIO case */ 405 case CCW_DEVTYPE_VIRTIO: 406 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 407 ipl->iplb.blk0_len = 408 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN); 409 ipl->iplb.pbt = S390_IPL_TYPE_CCW; 410 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 411 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3; 412 break; 413 } 414 415 if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) { 416 ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID; 417 } 418 419 return true; 420 } 421 422 return false; 423 } 424 425 int s390_ipl_set_loadparm(uint8_t *loadparm) 426 { 427 MachineState *machine = MACHINE(qdev_get_machine()); 428 char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL); 429 430 if (lp) { 431 int i; 432 433 /* lp is an uppercase string without leading/embedded spaces */ 434 for (i = 0; i < 8 && lp[i]; i++) { 435 loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]]; 436 } 437 438 if (i < 8) { 439 memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */ 440 } 441 442 g_free(lp); 443 return 0; 444 } 445 446 return -1; 447 } 448 449 static int load_netboot_image(Error **errp) 450 { 451 MachineState *ms = MACHINE(qdev_get_machine()); 452 S390IPLState *ipl = get_ipl_device(); 453 char *netboot_filename; 454 MemoryRegion *sysmem = get_system_memory(); 455 MemoryRegion *mr = NULL; 456 void *ram_ptr = NULL; 457 int img_size = -1; 458 459 mr = memory_region_find(sysmem, 0, 1).mr; 460 if (!mr) { 461 error_setg(errp, "Failed to find memory region at address 0"); 462 return -1; 463 } 464 465 ram_ptr = memory_region_get_ram_ptr(mr); 466 if (!ram_ptr) { 467 error_setg(errp, "No RAM found"); 468 goto unref_mr; 469 } 470 471 netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw); 472 if (netboot_filename == NULL) { 473 error_setg(errp, "Could not find network bootloader '%s'", 474 ipl->netboot_fw); 475 goto unref_mr; 476 } 477 478 img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL, 479 &ipl->start_addr, 480 NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL, 481 false); 482 483 if (img_size < 0) { 484 img_size = load_image_size(netboot_filename, ram_ptr, ms->ram_size); 485 ipl->start_addr = KERN_IMAGE_START; 486 } 487 488 if (img_size < 0) { 489 error_setg(errp, "Failed to load network bootloader"); 490 } 491 492 g_free(netboot_filename); 493 494 unref_mr: 495 memory_region_unref(mr); 496 return img_size; 497 } 498 499 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb, 500 int virtio_id) 501 { 502 uint8_t cssid; 503 uint8_t ssid; 504 uint16_t devno; 505 uint16_t schid; 506 SubchDev *sch = NULL; 507 508 if (iplb->pbt != S390_IPL_TYPE_CCW) { 509 return false; 510 } 511 512 devno = be16_to_cpu(iplb->ccw.devno); 513 ssid = iplb->ccw.ssid & 3; 514 515 for (schid = 0; schid < MAX_SCHID; schid++) { 516 for (cssid = 0; cssid < MAX_CSSID; cssid++) { 517 sch = css_find_subch(1, cssid, ssid, schid); 518 519 if (sch && sch->devno == devno) { 520 return sch->id.cu_model == virtio_id; 521 } 522 } 523 } 524 return false; 525 } 526 527 static bool is_virtio_net_device(IplParameterBlock *iplb) 528 { 529 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET); 530 } 531 532 static bool is_virtio_scsi_device(IplParameterBlock *iplb) 533 { 534 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI); 535 } 536 537 static void update_machine_ipl_properties(IplParameterBlock *iplb) 538 { 539 Object *machine = qdev_get_machine(); 540 Error *err = NULL; 541 542 /* Sync loadparm */ 543 if (iplb->flags & DIAG308_FLAGS_LP_VALID) { 544 uint8_t *ebcdic_loadparm = iplb->loadparm; 545 char ascii_loadparm[9]; 546 int i; 547 548 for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) { 549 ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]]; 550 } 551 ascii_loadparm[i] = 0; 552 object_property_set_str(machine, "loadparm", ascii_loadparm, &err); 553 } else { 554 object_property_set_str(machine, "loadparm", "", &err); 555 } 556 if (err) { 557 warn_report_err(err); 558 } 559 } 560 561 void s390_ipl_update_diag308(IplParameterBlock *iplb) 562 { 563 S390IPLState *ipl = get_ipl_device(); 564 565 /* 566 * The IPLB set and retrieved by subcodes 8/9 is completely 567 * separate from the one managed via subcodes 5/6. 568 */ 569 if (iplb->pbt == S390_IPL_TYPE_PV) { 570 ipl->iplb_pv = *iplb; 571 ipl->iplb_valid_pv = true; 572 } else { 573 ipl->iplb = *iplb; 574 ipl->iplb_valid = true; 575 } 576 ipl->netboot = is_virtio_net_device(iplb); 577 update_machine_ipl_properties(iplb); 578 } 579 580 IplParameterBlock *s390_ipl_get_iplb_pv(void) 581 { 582 S390IPLState *ipl = get_ipl_device(); 583 584 if (!ipl->iplb_valid_pv) { 585 return NULL; 586 } 587 return &ipl->iplb_pv; 588 } 589 590 IplParameterBlock *s390_ipl_get_iplb(void) 591 { 592 S390IPLState *ipl = get_ipl_device(); 593 594 if (!ipl->iplb_valid) { 595 return NULL; 596 } 597 return &ipl->iplb; 598 } 599 600 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type) 601 { 602 S390IPLState *ipl = get_ipl_device(); 603 604 if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) { 605 /* use CPU 0 for full resets */ 606 ipl->reset_cpu_index = 0; 607 } else { 608 ipl->reset_cpu_index = cs->cpu_index; 609 } 610 ipl->reset_type = reset_type; 611 612 if (reset_type == S390_RESET_REIPL && 613 ipl->iplb_valid && 614 !ipl->netboot && 615 ipl->iplb.pbt == S390_IPL_TYPE_CCW && 616 is_virtio_scsi_device(&ipl->iplb)) { 617 CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL); 618 619 if (ccw_dev && 620 cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno && 621 (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) { 622 /* 623 * this is the original boot device's SCSI 624 * so restore IPL parameter info from it 625 */ 626 ipl->iplb_valid = s390_gen_initial_iplb(ipl); 627 } 628 } 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(void) 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, 689 ipib_pv->pv_header_len); 690 g_free(hdr); 691 return rc; 692 } 693 694 int s390_ipl_pv_unpack(void) 695 { 696 IplParameterBlock *ipib = s390_ipl_get_iplb_pv(); 697 IPLBlockPV *ipib_pv = &ipib->pv; 698 int i, rc = 0; 699 700 for (i = 0; i < ipib_pv->num_comp; i++) { 701 rc = s390_pv_unpack(ipib_pv->components[i].addr, 702 TARGET_PAGE_ALIGN(ipib_pv->components[i].size), 703 ipib_pv->components[i].tweak_pref); 704 if (rc) { 705 break; 706 } 707 } 708 return rc; 709 } 710 711 void s390_ipl_prepare_cpu(S390CPU *cpu) 712 { 713 S390IPLState *ipl = get_ipl_device(); 714 715 cpu->env.psw.addr = ipl->start_addr; 716 cpu->env.psw.mask = IPL_PSW_MASK; 717 718 if (!ipl->kernel || ipl->iplb_valid) { 719 cpu->env.psw.addr = ipl->bios_start_addr; 720 if (!ipl->iplb_valid) { 721 ipl->iplb_valid = s390_gen_initial_iplb(ipl); 722 } 723 } 724 if (ipl->netboot) { 725 load_netboot_image(&error_fatal); 726 ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr); 727 } 728 s390_ipl_set_boot_menu(ipl); 729 s390_ipl_prepare_qipl(cpu); 730 } 731 732 static void s390_ipl_reset(DeviceState *dev) 733 { 734 S390IPLState *ipl = S390_IPL(dev); 735 736 if (ipl->reset_type != S390_RESET_REIPL) { 737 ipl->iplb_valid = false; 738 memset(&ipl->iplb, 0, sizeof(IplParameterBlock)); 739 } 740 } 741 742 static void s390_ipl_class_init(ObjectClass *klass, void *data) 743 { 744 DeviceClass *dc = DEVICE_CLASS(klass); 745 746 dc->realize = s390_ipl_realize; 747 device_class_set_props(dc, s390_ipl_properties); 748 dc->reset = s390_ipl_reset; 749 dc->vmsd = &vmstate_ipl; 750 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 751 /* Reason: Loads the ROMs and thus can only be used one time - internally */ 752 dc->user_creatable = false; 753 } 754 755 static const TypeInfo s390_ipl_info = { 756 .class_init = s390_ipl_class_init, 757 .parent = TYPE_DEVICE, 758 .name = TYPE_S390_IPL, 759 .instance_size = sizeof(S390IPLState), 760 }; 761 762 static void s390_ipl_register_types(void) 763 { 764 type_register_static(&s390_ipl_info); 765 } 766 767 type_init(s390_ipl_register_types) 768