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 "cpu.h" 23 #include "elf.h" 24 #include "hw/loader.h" 25 #include "hw/qdev-properties.h" 26 #include "hw/boards.h" 27 #include "hw/s390x/virtio-ccw.h" 28 #include "hw/s390x/vfio-ccw.h" 29 #include "hw/s390x/css.h" 30 #include "hw/s390x/ebcdic.h" 31 #include "hw/s390x/pv.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 "exec/exec-all.h" 38 39 #define KERN_IMAGE_START 0x010000UL 40 #define LINUX_MAGIC_ADDR 0x010008UL 41 #define KERN_PARM_AREA 0x010480UL 42 #define INITRD_START 0x800000UL 43 #define INITRD_PARM_START 0x010408UL 44 #define PARMFILE_START 0x001000UL 45 #define ZIPL_IMAGE_START 0x009000UL 46 #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) 47 48 static bool iplb_extended_needed(void *opaque) 49 { 50 S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL)); 51 52 return ipl->iplbext_migration; 53 } 54 55 static const VMStateDescription vmstate_iplb_extended = { 56 .name = "ipl/iplb_extended", 57 .version_id = 0, 58 .minimum_version_id = 0, 59 .needed = iplb_extended_needed, 60 .fields = (VMStateField[]) { 61 VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200), 62 VMSTATE_END_OF_LIST() 63 } 64 }; 65 66 static const VMStateDescription vmstate_iplb = { 67 .name = "ipl/iplb", 68 .version_id = 0, 69 .minimum_version_id = 0, 70 .fields = (VMStateField[]) { 71 VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110), 72 VMSTATE_UINT16(devno, IplParameterBlock), 73 VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88), 74 VMSTATE_END_OF_LIST() 75 }, 76 .subsections = (const VMStateDescription*[]) { 77 &vmstate_iplb_extended, 78 NULL 79 } 80 }; 81 82 static const VMStateDescription vmstate_ipl = { 83 .name = "ipl", 84 .version_id = 0, 85 .minimum_version_id = 0, 86 .fields = (VMStateField[]) { 87 VMSTATE_UINT64(compat_start_addr, S390IPLState), 88 VMSTATE_UINT64(compat_bios_start_addr, S390IPLState), 89 VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock), 90 VMSTATE_BOOL(iplb_valid, S390IPLState), 91 VMSTATE_UINT8(cssid, S390IPLState), 92 VMSTATE_UINT8(ssid, S390IPLState), 93 VMSTATE_UINT16(devno, S390IPLState), 94 VMSTATE_END_OF_LIST() 95 } 96 }; 97 98 static S390IPLState *get_ipl_device(void) 99 { 100 return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL)); 101 } 102 103 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr) 104 { 105 uint64_t dstaddr = *(uint64_t *) opaque; 106 /* 107 * Assuming that our s390-ccw.img was linked for starting at address 0, 108 * we can simply add the destination address for the final location 109 */ 110 return srcaddr + dstaddr; 111 } 112 113 static void s390_ipl_realize(DeviceState *dev, Error **errp) 114 { 115 MachineState *ms = MACHINE(qdev_get_machine()); 116 S390IPLState *ipl = S390_IPL(dev); 117 uint32_t *ipl_psw; 118 uint64_t pentry; 119 char *magic; 120 int kernel_size; 121 122 int bios_size; 123 char *bios_filename; 124 125 /* 126 * Always load the bios if it was enforced, 127 * even if an external kernel has been defined. 128 */ 129 if (!ipl->kernel || ipl->enforce_bios) { 130 uint64_t fwbase = (MIN(ms->ram_size, 0x80000000U) - 0x200000) & ~0xffffUL; 131 132 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->firmware); 133 if (bios_filename == NULL) { 134 error_setg(errp, "could not find stage1 bootloader"); 135 return; 136 } 137 138 bios_size = load_elf(bios_filename, NULL, 139 bios_translate_addr, &fwbase, 140 &ipl->bios_start_addr, NULL, NULL, NULL, 1, 141 EM_S390, 0, 0); 142 if (bios_size > 0) { 143 /* Adjust ELF start address to final location */ 144 ipl->bios_start_addr += fwbase; 145 } else { 146 /* Try to load non-ELF file */ 147 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, 148 4096); 149 ipl->bios_start_addr = ZIPL_IMAGE_START; 150 } 151 g_free(bios_filename); 152 153 if (bios_size == -1) { 154 error_setg(errp, "could not load bootloader '%s'", ipl->firmware); 155 return; 156 } 157 158 /* default boot target is the bios */ 159 ipl->start_addr = ipl->bios_start_addr; 160 } 161 162 if (ipl->kernel) { 163 kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL, 164 &pentry, NULL, 165 NULL, NULL, 1, EM_S390, 0, 0); 166 if (kernel_size < 0) { 167 kernel_size = load_image_targphys(ipl->kernel, 0, ms->ram_size); 168 if (kernel_size < 0) { 169 error_setg(errp, "could not load kernel '%s'", ipl->kernel); 170 return; 171 } 172 /* if this is Linux use KERN_IMAGE_START */ 173 magic = rom_ptr(LINUX_MAGIC_ADDR, 6); 174 if (magic && !memcmp(magic, "S390EP", 6)) { 175 pentry = KERN_IMAGE_START; 176 } else { 177 /* if not Linux load the address of the (short) IPL PSW */ 178 ipl_psw = rom_ptr(4, 4); 179 if (ipl_psw) { 180 pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR; 181 } else { 182 error_setg(errp, "Could not get IPL PSW"); 183 return; 184 } 185 } 186 } 187 /* 188 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the 189 * kernel parameters here as well. Note: For old kernels (up to 3.2) 190 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL 191 * loader) and it won't work. For this case we force it to 0x10000, too. 192 */ 193 if (pentry == KERN_IMAGE_START || pentry == 0x800) { 194 char *parm_area = rom_ptr(KERN_PARM_AREA, strlen(ipl->cmdline) + 1); 195 ipl->start_addr = KERN_IMAGE_START; 196 /* Overwrite parameters in the kernel image, which are "rom" */ 197 if (parm_area) { 198 strcpy(parm_area, ipl->cmdline); 199 } 200 } else { 201 ipl->start_addr = pentry; 202 } 203 204 if (ipl->initrd) { 205 ram_addr_t initrd_offset; 206 int initrd_size; 207 uint64_t *romptr; 208 209 initrd_offset = INITRD_START; 210 while (kernel_size + 0x100000 > initrd_offset) { 211 initrd_offset += 0x100000; 212 } 213 initrd_size = load_image_targphys(ipl->initrd, initrd_offset, 214 ms->ram_size - initrd_offset); 215 if (initrd_size == -1) { 216 error_setg(errp, "could not load initrd '%s'", ipl->initrd); 217 return; 218 } 219 220 /* 221 * we have to overwrite values in the kernel image, 222 * which are "rom" 223 */ 224 romptr = rom_ptr(INITRD_PARM_START, 16); 225 if (romptr) { 226 stq_p(romptr, initrd_offset); 227 stq_p(romptr + 1, initrd_size); 228 } 229 } 230 } 231 /* 232 * Don't ever use the migrated values, they could come from a different 233 * BIOS and therefore don't work. But still migrate the values, so 234 * QEMUs relying on it don't break. 235 */ 236 ipl->compat_start_addr = ipl->start_addr; 237 ipl->compat_bios_start_addr = ipl->bios_start_addr; 238 /* 239 * Because this Device is not on any bus in the qbus tree (it is 240 * not a sysbus device and it's not on some other bus like a PCI 241 * bus) it will not be automatically reset by the 'reset the 242 * sysbus' hook registered by vl.c like most devices. So we must 243 * manually register a reset hook for it. 244 * TODO: there should be a better way to do this. 245 */ 246 qemu_register_reset(resettable_cold_reset_fn, dev); 247 } 248 249 static Property s390_ipl_properties[] = { 250 DEFINE_PROP_STRING("kernel", S390IPLState, kernel), 251 DEFINE_PROP_STRING("initrd", S390IPLState, initrd), 252 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), 253 DEFINE_PROP_STRING("firmware", S390IPLState, firmware), 254 DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw), 255 DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), 256 DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration, 257 true), 258 DEFINE_PROP_END_OF_LIST(), 259 }; 260 261 static void s390_ipl_set_boot_menu(S390IPLState *ipl) 262 { 263 QemuOptsList *plist = qemu_find_opts("boot-opts"); 264 QemuOpts *opts = QTAILQ_FIRST(&plist->head); 265 const char *tmp; 266 unsigned long splash_time = 0; 267 268 if (!get_boot_device(0)) { 269 if (boot_menu) { 270 error_report("boot menu requires a bootindex to be specified for " 271 "the IPL device"); 272 } 273 return; 274 } 275 276 switch (ipl->iplb.pbt) { 277 case S390_IPL_TYPE_CCW: 278 /* In the absence of -boot menu, use zipl parameters */ 279 if (!qemu_opt_get(opts, "menu")) { 280 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL; 281 return; 282 } 283 break; 284 case S390_IPL_TYPE_QEMU_SCSI: 285 break; 286 default: 287 if (boot_menu) { 288 error_report("boot menu is not supported for this device type"); 289 } 290 return; 291 } 292 293 if (!boot_menu) { 294 return; 295 } 296 297 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD; 298 299 tmp = qemu_opt_get(opts, "splash-time"); 300 301 if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) { 302 error_report("splash-time is invalid, forcing it to 0"); 303 ipl->qipl.boot_menu_timeout = 0; 304 return; 305 } 306 307 if (splash_time > 0xffffffff) { 308 error_report("splash-time is too large, forcing it to max value"); 309 ipl->qipl.boot_menu_timeout = 0xffffffff; 310 return; 311 } 312 313 ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time); 314 } 315 316 #define CCW_DEVTYPE_NONE 0x00 317 #define CCW_DEVTYPE_VIRTIO 0x01 318 #define CCW_DEVTYPE_VIRTIO_NET 0x02 319 #define CCW_DEVTYPE_SCSI 0x03 320 #define CCW_DEVTYPE_VFIO 0x04 321 322 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype) 323 { 324 CcwDevice *ccw_dev = NULL; 325 int tmp_dt = CCW_DEVTYPE_NONE; 326 327 if (dev_st) { 328 VirtIONet *virtio_net_dev = (VirtIONet *) 329 object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET); 330 VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *) 331 object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent), 332 TYPE_VIRTIO_CCW_DEVICE); 333 VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *) 334 object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW); 335 336 if (virtio_ccw_dev) { 337 ccw_dev = CCW_DEVICE(virtio_ccw_dev); 338 if (virtio_net_dev) { 339 tmp_dt = CCW_DEVTYPE_VIRTIO_NET; 340 } else { 341 tmp_dt = CCW_DEVTYPE_VIRTIO; 342 } 343 } else if (vfio_ccw_dev) { 344 ccw_dev = CCW_DEVICE(vfio_ccw_dev); 345 tmp_dt = CCW_DEVTYPE_VFIO; 346 } else { 347 SCSIDevice *sd = (SCSIDevice *) 348 object_dynamic_cast(OBJECT(dev_st), 349 TYPE_SCSI_DEVICE); 350 if (sd) { 351 SCSIBus *bus = scsi_bus_from_device(sd); 352 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus); 353 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw, 354 vdev); 355 356 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw), 357 TYPE_CCW_DEVICE); 358 tmp_dt = CCW_DEVTYPE_SCSI; 359 } 360 } 361 } 362 if (devtype) { 363 *devtype = tmp_dt; 364 } 365 return ccw_dev; 366 } 367 368 static bool s390_gen_initial_iplb(S390IPLState *ipl) 369 { 370 DeviceState *dev_st; 371 CcwDevice *ccw_dev = NULL; 372 SCSIDevice *sd; 373 int devtype; 374 375 dev_st = get_boot_device(0); 376 if (dev_st) { 377 ccw_dev = s390_get_ccw_device(dev_st, &devtype); 378 } 379 380 /* 381 * Currently allow IPL only from CCW devices. 382 */ 383 if (ccw_dev) { 384 switch (devtype) { 385 case CCW_DEVTYPE_SCSI: 386 sd = SCSI_DEVICE(dev_st); 387 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN); 388 ipl->iplb.blk0_len = 389 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN); 390 ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI; 391 ipl->iplb.scsi.lun = cpu_to_be32(sd->lun); 392 ipl->iplb.scsi.target = cpu_to_be16(sd->id); 393 ipl->iplb.scsi.channel = cpu_to_be16(sd->channel); 394 ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno); 395 ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3; 396 break; 397 case CCW_DEVTYPE_VFIO: 398 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 399 ipl->iplb.pbt = S390_IPL_TYPE_CCW; 400 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 401 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3; 402 break; 403 case CCW_DEVTYPE_VIRTIO_NET: 404 ipl->netboot = true; 405 /* Fall through to CCW_DEVTYPE_VIRTIO case */ 406 case CCW_DEVTYPE_VIRTIO: 407 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); 408 ipl->iplb.blk0_len = 409 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN); 410 ipl->iplb.pbt = S390_IPL_TYPE_CCW; 411 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno); 412 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3; 413 break; 414 } 415 416 if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) { 417 ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID; 418 } 419 420 return true; 421 } 422 423 return false; 424 } 425 426 int s390_ipl_set_loadparm(uint8_t *loadparm) 427 { 428 MachineState *machine = MACHINE(qdev_get_machine()); 429 char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL); 430 431 if (lp) { 432 int i; 433 434 /* lp is an uppercase string without leading/embedded spaces */ 435 for (i = 0; i < 8 && lp[i]; i++) { 436 loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]]; 437 } 438 439 if (i < 8) { 440 memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */ 441 } 442 443 g_free(lp); 444 return 0; 445 } 446 447 return -1; 448 } 449 450 static int load_netboot_image(Error **errp) 451 { 452 MachineState *ms = MACHINE(qdev_get_machine()); 453 S390IPLState *ipl = get_ipl_device(); 454 char *netboot_filename; 455 MemoryRegion *sysmem = get_system_memory(); 456 MemoryRegion *mr = NULL; 457 void *ram_ptr = NULL; 458 int img_size = -1; 459 460 mr = memory_region_find(sysmem, 0, 1).mr; 461 if (!mr) { 462 error_setg(errp, "Failed to find memory region at address 0"); 463 return -1; 464 } 465 466 ram_ptr = memory_region_get_ram_ptr(mr); 467 if (!ram_ptr) { 468 error_setg(errp, "No RAM found"); 469 goto unref_mr; 470 } 471 472 netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw); 473 if (netboot_filename == NULL) { 474 error_setg(errp, "Could not find network bootloader '%s'", 475 ipl->netboot_fw); 476 goto unref_mr; 477 } 478 479 img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL, 480 &ipl->start_addr, 481 NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL, 482 false); 483 484 if (img_size < 0) { 485 img_size = load_image_size(netboot_filename, ram_ptr, ms->ram_size); 486 ipl->start_addr = KERN_IMAGE_START; 487 } 488 489 if (img_size < 0) { 490 error_setg(errp, "Failed to load network bootloader"); 491 } 492 493 g_free(netboot_filename); 494 495 unref_mr: 496 memory_region_unref(mr); 497 return img_size; 498 } 499 500 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb, 501 int virtio_id) 502 { 503 uint8_t cssid; 504 uint8_t ssid; 505 uint16_t devno; 506 uint16_t schid; 507 SubchDev *sch = NULL; 508 509 if (iplb->pbt != S390_IPL_TYPE_CCW) { 510 return false; 511 } 512 513 devno = be16_to_cpu(iplb->ccw.devno); 514 ssid = iplb->ccw.ssid & 3; 515 516 for (schid = 0; schid < MAX_SCHID; schid++) { 517 for (cssid = 0; cssid < MAX_CSSID; cssid++) { 518 sch = css_find_subch(1, cssid, ssid, schid); 519 520 if (sch && sch->devno == devno) { 521 return sch->id.cu_model == virtio_id; 522 } 523 } 524 } 525 return false; 526 } 527 528 static bool is_virtio_net_device(IplParameterBlock *iplb) 529 { 530 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET); 531 } 532 533 static bool is_virtio_scsi_device(IplParameterBlock *iplb) 534 { 535 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI); 536 } 537 538 static void update_machine_ipl_properties(IplParameterBlock *iplb) 539 { 540 Object *machine = qdev_get_machine(); 541 Error *err = NULL; 542 543 /* Sync loadparm */ 544 if (iplb->flags & DIAG308_FLAGS_LP_VALID) { 545 uint8_t *ebcdic_loadparm = iplb->loadparm; 546 char ascii_loadparm[9]; 547 int i; 548 549 for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) { 550 ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]]; 551 } 552 ascii_loadparm[i] = 0; 553 object_property_set_str(machine, "loadparm", ascii_loadparm, &err); 554 } else { 555 object_property_set_str(machine, "loadparm", "", &err); 556 } 557 if (err) { 558 warn_report_err(err); 559 } 560 } 561 562 void s390_ipl_update_diag308(IplParameterBlock *iplb) 563 { 564 S390IPLState *ipl = get_ipl_device(); 565 566 /* 567 * The IPLB set and retrieved by subcodes 8/9 is completely 568 * separate from the one managed via subcodes 5/6. 569 */ 570 if (iplb->pbt == S390_IPL_TYPE_PV) { 571 ipl->iplb_pv = *iplb; 572 ipl->iplb_valid_pv = true; 573 } else { 574 ipl->iplb = *iplb; 575 ipl->iplb_valid = true; 576 } 577 ipl->netboot = is_virtio_net_device(iplb); 578 update_machine_ipl_properties(iplb); 579 } 580 581 IplParameterBlock *s390_ipl_get_iplb_pv(void) 582 { 583 S390IPLState *ipl = get_ipl_device(); 584 585 if (!ipl->iplb_valid_pv) { 586 return NULL; 587 } 588 return &ipl->iplb_pv; 589 } 590 591 IplParameterBlock *s390_ipl_get_iplb(void) 592 { 593 S390IPLState *ipl = get_ipl_device(); 594 595 if (!ipl->iplb_valid) { 596 return NULL; 597 } 598 return &ipl->iplb; 599 } 600 601 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type) 602 { 603 S390IPLState *ipl = get_ipl_device(); 604 605 if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) { 606 /* use CPU 0 for full resets */ 607 ipl->reset_cpu_index = 0; 608 } else { 609 ipl->reset_cpu_index = cs->cpu_index; 610 } 611 ipl->reset_type = reset_type; 612 613 if (reset_type == S390_RESET_REIPL && 614 ipl->iplb_valid && 615 !ipl->netboot && 616 ipl->iplb.pbt == S390_IPL_TYPE_CCW && 617 is_virtio_scsi_device(&ipl->iplb)) { 618 CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL); 619 620 if (ccw_dev && 621 cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno && 622 (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) { 623 /* 624 * this is the original boot device's SCSI 625 * so restore IPL parameter info from it 626 */ 627 ipl->iplb_valid = s390_gen_initial_iplb(ipl); 628 } 629 } 630 if (reset_type == S390_RESET_MODIFIED_CLEAR || 631 reset_type == S390_RESET_LOAD_NORMAL || 632 reset_type == S390_RESET_PV) { 633 /* ignore -no-reboot, send no event */ 634 qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET); 635 } else { 636 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 637 } 638 /* as this is triggered by a CPU, make sure to exit the loop */ 639 if (tcg_enabled()) { 640 cpu_loop_exit(cs); 641 } 642 } 643 644 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type) 645 { 646 S390IPLState *ipl = get_ipl_device(); 647 648 *cs = qemu_get_cpu(ipl->reset_cpu_index); 649 if (!*cs) { 650 /* use any CPU */ 651 *cs = first_cpu; 652 } 653 *reset_type = ipl->reset_type; 654 } 655 656 void s390_ipl_clear_reset_request(void) 657 { 658 S390IPLState *ipl = get_ipl_device(); 659 660 ipl->reset_type = S390_RESET_EXTERNAL; 661 /* use CPU 0 for full resets */ 662 ipl->reset_cpu_index = 0; 663 } 664 665 static void s390_ipl_prepare_qipl(S390CPU *cpu) 666 { 667 S390IPLState *ipl = get_ipl_device(); 668 uint8_t *addr; 669 uint64_t len = 4096; 670 671 addr = cpu_physical_memory_map(cpu->env.psa, &len, true); 672 if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) { 673 error_report("Cannot set QEMU IPL parameters"); 674 return; 675 } 676 memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters)); 677 cpu_physical_memory_unmap(addr, len, 1, len); 678 } 679 680 int s390_ipl_prepare_pv_header(void) 681 { 682 IplParameterBlock *ipib = s390_ipl_get_iplb_pv(); 683 IPLBlockPV *ipib_pv = &ipib->pv; 684 void *hdr = g_malloc(ipib_pv->pv_header_len); 685 int rc; 686 687 cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr, 688 ipib_pv->pv_header_len); 689 rc = s390_pv_set_sec_parms((uintptr_t)hdr, 690 ipib_pv->pv_header_len); 691 g_free(hdr); 692 return rc; 693 } 694 695 int s390_ipl_pv_unpack(void) 696 { 697 IplParameterBlock *ipib = s390_ipl_get_iplb_pv(); 698 IPLBlockPV *ipib_pv = &ipib->pv; 699 int i, rc = 0; 700 701 for (i = 0; i < ipib_pv->num_comp; i++) { 702 rc = s390_pv_unpack(ipib_pv->components[i].addr, 703 TARGET_PAGE_ALIGN(ipib_pv->components[i].size), 704 ipib_pv->components[i].tweak_pref); 705 if (rc) { 706 break; 707 } 708 } 709 return rc; 710 } 711 712 void s390_ipl_prepare_cpu(S390CPU *cpu) 713 { 714 S390IPLState *ipl = get_ipl_device(); 715 Error *err = NULL; 716 717 cpu->env.psw.addr = ipl->start_addr; 718 cpu->env.psw.mask = IPL_PSW_MASK; 719 720 if (!ipl->kernel || ipl->iplb_valid) { 721 cpu->env.psw.addr = ipl->bios_start_addr; 722 if (!ipl->iplb_valid) { 723 ipl->iplb_valid = s390_gen_initial_iplb(ipl); 724 } 725 } 726 if (ipl->netboot) { 727 if (load_netboot_image(&err) < 0) { 728 error_report_err(err); 729 exit(1); 730 } 731 ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr); 732 } 733 s390_ipl_set_boot_menu(ipl); 734 s390_ipl_prepare_qipl(cpu); 735 } 736 737 static void s390_ipl_reset(DeviceState *dev) 738 { 739 S390IPLState *ipl = S390_IPL(dev); 740 741 if (ipl->reset_type != S390_RESET_REIPL) { 742 ipl->iplb_valid = false; 743 memset(&ipl->iplb, 0, sizeof(IplParameterBlock)); 744 } 745 } 746 747 static void s390_ipl_class_init(ObjectClass *klass, void *data) 748 { 749 DeviceClass *dc = DEVICE_CLASS(klass); 750 751 dc->realize = s390_ipl_realize; 752 device_class_set_props(dc, s390_ipl_properties); 753 dc->reset = s390_ipl_reset; 754 dc->vmsd = &vmstate_ipl; 755 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 756 /* Reason: Loads the ROMs and thus can only be used one time - internally */ 757 dc->user_creatable = false; 758 } 759 760 static const TypeInfo s390_ipl_info = { 761 .class_init = s390_ipl_class_init, 762 .parent = TYPE_DEVICE, 763 .name = TYPE_S390_IPL, 764 .instance_size = sizeof(S390IPLState), 765 }; 766 767 static void s390_ipl_register_types(void) 768 { 769 type_register_static(&s390_ipl_info); 770 } 771 772 type_init(s390_ipl_register_types) 773