xref: /openbmc/qemu/hw/s390x/ipl.c (revision 988717b46b6424907618cb845ace9d69062703af)
1  /*
2   * bootloader support
3   *
4   * Copyright IBM, Corp. 2012
5   *
6   * Authors:
7   *  Christian Borntraeger <borntraeger@de.ibm.com>
8   *
9   * This work is licensed under the terms of the GNU GPL, version 2 or (at your
10   * option) any later version.  See the COPYING file in the top-level directory.
11   *
12   */
13  
14  #include "qemu/osdep.h"
15  #include "qemu-common.h"
16  #include "qapi/error.h"
17  #include "sysemu/reset.h"
18  #include "sysemu/runstate.h"
19  #include "sysemu/sysemu.h"
20  #include "sysemu/tcg.h"
21  #include "cpu.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 "ipl.h"
31  #include "qemu/error-report.h"
32  #include "qemu/config-file.h"
33  #include "qemu/cutils.h"
34  #include "qemu/option.h"
35  #include "exec/exec-all.h"
36  
37  #define KERN_IMAGE_START                0x010000UL
38  #define LINUX_MAGIC_ADDR                0x010008UL
39  #define KERN_PARM_AREA                  0x010480UL
40  #define INITRD_START                    0x800000UL
41  #define INITRD_PARM_START               0x010408UL
42  #define PARMFILE_START                  0x001000UL
43  #define ZIPL_IMAGE_START                0x009000UL
44  #define IPL_PSW_MASK                    (PSW_MASK_32 | PSW_MASK_64)
45  
46  static bool iplb_extended_needed(void *opaque)
47  {
48      S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
49  
50      return ipl->iplbext_migration;
51  }
52  
53  static const VMStateDescription vmstate_iplb_extended = {
54      .name = "ipl/iplb_extended",
55      .version_id = 0,
56      .minimum_version_id = 0,
57      .needed = iplb_extended_needed,
58      .fields = (VMStateField[]) {
59          VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
60          VMSTATE_END_OF_LIST()
61      }
62  };
63  
64  static const VMStateDescription vmstate_iplb = {
65      .name = "ipl/iplb",
66      .version_id = 0,
67      .minimum_version_id = 0,
68      .fields = (VMStateField[]) {
69          VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
70          VMSTATE_UINT16(devno, IplParameterBlock),
71          VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
72          VMSTATE_END_OF_LIST()
73      },
74      .subsections = (const VMStateDescription*[]) {
75          &vmstate_iplb_extended,
76          NULL
77      }
78  };
79  
80  static const VMStateDescription vmstate_ipl = {
81      .name = "ipl",
82      .version_id = 0,
83      .minimum_version_id = 0,
84      .fields = (VMStateField[]) {
85          VMSTATE_UINT64(compat_start_addr, S390IPLState),
86          VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
87          VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
88          VMSTATE_BOOL(iplb_valid, S390IPLState),
89          VMSTATE_UINT8(cssid, S390IPLState),
90          VMSTATE_UINT8(ssid, S390IPLState),
91          VMSTATE_UINT16(devno, S390IPLState),
92          VMSTATE_END_OF_LIST()
93       }
94  };
95  
96  static S390IPLState *get_ipl_device(void)
97  {
98      return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
99  }
100  
101  static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
102  {
103      uint64_t dstaddr = *(uint64_t *) opaque;
104      /*
105       * Assuming that our s390-ccw.img was linked for starting at address 0,
106       * we can simply add the destination address for the final location
107       */
108      return srcaddr + dstaddr;
109  }
110  
111  static void s390_ipl_realize(DeviceState *dev, Error **errp)
112  {
113      S390IPLState *ipl = S390_IPL(dev);
114      uint32_t *ipl_psw;
115      uint64_t pentry;
116      char *magic;
117      int kernel_size;
118      Error *err = NULL;
119  
120      int bios_size;
121      char *bios_filename;
122  
123      /*
124       * Always load the bios if it was enforced,
125       * even if an external kernel has been defined.
126       */
127      if (!ipl->kernel || ipl->enforce_bios) {
128          uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
129  
130          if (bios_name == NULL) {
131              bios_name = ipl->firmware;
132          }
133  
134          bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
135          if (bios_filename == NULL) {
136              error_setg(&err, "could not find stage1 bootloader");
137              goto error;
138          }
139  
140          bios_size = load_elf(bios_filename, NULL,
141                               bios_translate_addr, &fwbase,
142                               &ipl->bios_start_addr, NULL, NULL, NULL, 1,
143                               EM_S390, 0, 0);
144          if (bios_size > 0) {
145              /* Adjust ELF start address to final location */
146              ipl->bios_start_addr += fwbase;
147          } else {
148              /* Try to load non-ELF file */
149              bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
150                                              4096);
151              ipl->bios_start_addr = ZIPL_IMAGE_START;
152          }
153          g_free(bios_filename);
154  
155          if (bios_size == -1) {
156              error_setg(&err, "could not load bootloader '%s'", bios_name);
157              goto error;
158          }
159  
160          /* default boot target is the bios */
161          ipl->start_addr = ipl->bios_start_addr;
162      }
163  
164      if (ipl->kernel) {
165          kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL,
166                                 &pentry, NULL,
167                                 NULL, NULL, 1, EM_S390, 0, 0);
168          if (kernel_size < 0) {
169              kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
170              if (kernel_size < 0) {
171                  error_setg(&err, "could not load kernel '%s'", ipl->kernel);
172                  goto error;
173              }
174              /* if this is Linux use KERN_IMAGE_START */
175              magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
176              if (magic && !memcmp(magic, "S390EP", 6)) {
177                  pentry = KERN_IMAGE_START;
178              } else {
179                  /* if not Linux load the address of the (short) IPL PSW */
180                  ipl_psw = rom_ptr(4, 4);
181                  if (ipl_psw) {
182                      pentry = be32_to_cpu(*ipl_psw) & 0x7fffffffUL;
183                  } else {
184                      error_setg(&err, "Could not get IPL PSW");
185                      goto error;
186                  }
187              }
188          }
189          /*
190           * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
191           * kernel parameters here as well. Note: For old kernels (up to 3.2)
192           * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
193           * loader) and it won't work. For this case we force it to 0x10000, too.
194           */
195          if (pentry == KERN_IMAGE_START || pentry == 0x800) {
196              char *parm_area = rom_ptr(KERN_PARM_AREA, strlen(ipl->cmdline) + 1);
197              ipl->start_addr = KERN_IMAGE_START;
198              /* Overwrite parameters in the kernel image, which are "rom" */
199              if (parm_area) {
200                  strcpy(parm_area, ipl->cmdline);
201              }
202          } else {
203              ipl->start_addr = pentry;
204          }
205  
206          if (ipl->initrd) {
207              ram_addr_t initrd_offset;
208              int initrd_size;
209              uint64_t *romptr;
210  
211              initrd_offset = INITRD_START;
212              while (kernel_size + 0x100000 > initrd_offset) {
213                  initrd_offset += 0x100000;
214              }
215              initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
216                                                ram_size - initrd_offset);
217              if (initrd_size == -1) {
218                  error_setg(&err, "could not load initrd '%s'", ipl->initrd);
219                  goto error;
220              }
221  
222              /*
223               * we have to overwrite values in the kernel image,
224               * which are "rom"
225               */
226              romptr = rom_ptr(INITRD_PARM_START, 16);
227              if (romptr) {
228                  stq_p(romptr, initrd_offset);
229                  stq_p(romptr + 1, initrd_size);
230              }
231          }
232      }
233      /*
234       * Don't ever use the migrated values, they could come from a different
235       * BIOS and therefore don't work. But still migrate the values, so
236       * QEMUs relying on it don't break.
237       */
238      ipl->compat_start_addr = ipl->start_addr;
239      ipl->compat_bios_start_addr = ipl->bios_start_addr;
240      /*
241       * Because this Device is not on any bus in the qbus tree (it is
242       * not a sysbus device and it's not on some other bus like a PCI
243       * bus) it will not be automatically reset by the 'reset the
244       * sysbus' hook registered by vl.c like most devices. So we must
245       * manually register a reset hook for it.
246       * TODO: there should be a better way to do this.
247       */
248      qemu_register_reset(resettable_cold_reset_fn, dev);
249  error:
250      error_propagate(errp, err);
251  }
252  
253  static Property s390_ipl_properties[] = {
254      DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
255      DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
256      DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
257      DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
258      DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
259      DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
260      DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
261                       true),
262      DEFINE_PROP_END_OF_LIST(),
263  };
264  
265  static void s390_ipl_set_boot_menu(S390IPLState *ipl)
266  {
267      QemuOptsList *plist = qemu_find_opts("boot-opts");
268      QemuOpts *opts = QTAILQ_FIRST(&plist->head);
269      const char *tmp;
270      unsigned long splash_time = 0;
271  
272      if (!get_boot_device(0)) {
273          if (boot_menu) {
274              error_report("boot menu requires a bootindex to be specified for "
275                           "the IPL device");
276          }
277          return;
278      }
279  
280      switch (ipl->iplb.pbt) {
281      case S390_IPL_TYPE_CCW:
282          /* In the absence of -boot menu, use zipl parameters */
283          if (!qemu_opt_get(opts, "menu")) {
284              ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
285              return;
286          }
287          break;
288      case S390_IPL_TYPE_QEMU_SCSI:
289          break;
290      default:
291          if (boot_menu) {
292              error_report("boot menu is not supported for this device type");
293          }
294          return;
295      }
296  
297      if (!boot_menu) {
298          return;
299      }
300  
301      ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
302  
303      tmp = qemu_opt_get(opts, "splash-time");
304  
305      if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
306          error_report("splash-time is invalid, forcing it to 0");
307          ipl->qipl.boot_menu_timeout = 0;
308          return;
309      }
310  
311      if (splash_time > 0xffffffff) {
312          error_report("splash-time is too large, forcing it to max value");
313          ipl->qipl.boot_menu_timeout = 0xffffffff;
314          return;
315      }
316  
317      ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
318  }
319  
320  #define CCW_DEVTYPE_NONE        0x00
321  #define CCW_DEVTYPE_VIRTIO      0x01
322  #define CCW_DEVTYPE_VIRTIO_NET  0x02
323  #define CCW_DEVTYPE_SCSI        0x03
324  #define CCW_DEVTYPE_VFIO        0x04
325  
326  static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
327  {
328      CcwDevice *ccw_dev = NULL;
329      int tmp_dt = CCW_DEVTYPE_NONE;
330  
331      if (dev_st) {
332          VirtIONet *virtio_net_dev = (VirtIONet *)
333              object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
334          VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
335              object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
336                                  TYPE_VIRTIO_CCW_DEVICE);
337          VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
338              object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
339  
340          if (virtio_ccw_dev) {
341              ccw_dev = CCW_DEVICE(virtio_ccw_dev);
342              if (virtio_net_dev) {
343                  tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
344              } else {
345                  tmp_dt = CCW_DEVTYPE_VIRTIO;
346              }
347          } else if (vfio_ccw_dev) {
348              ccw_dev = CCW_DEVICE(vfio_ccw_dev);
349              tmp_dt = CCW_DEVTYPE_VFIO;
350          } else {
351              SCSIDevice *sd = (SCSIDevice *)
352                  object_dynamic_cast(OBJECT(dev_st),
353                                      TYPE_SCSI_DEVICE);
354              if (sd) {
355                  SCSIBus *bus = scsi_bus_from_device(sd);
356                  VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
357                  VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
358                                                         vdev);
359  
360                  ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
361                                                             TYPE_CCW_DEVICE);
362                  tmp_dt = CCW_DEVTYPE_SCSI;
363              }
364          }
365      }
366      if (devtype) {
367          *devtype = tmp_dt;
368      }
369      return ccw_dev;
370  }
371  
372  static bool s390_gen_initial_iplb(S390IPLState *ipl)
373  {
374      DeviceState *dev_st;
375      CcwDevice *ccw_dev = NULL;
376      SCSIDevice *sd;
377      int devtype;
378  
379      dev_st = get_boot_device(0);
380      if (dev_st) {
381          ccw_dev = s390_get_ccw_device(dev_st, &devtype);
382      }
383  
384      /*
385       * Currently allow IPL only from CCW devices.
386       */
387      if (ccw_dev) {
388          switch (devtype) {
389          case CCW_DEVTYPE_SCSI:
390              sd = SCSI_DEVICE(dev_st);
391              ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
392              ipl->iplb.blk0_len =
393                  cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
394              ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
395              ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
396              ipl->iplb.scsi.target = cpu_to_be16(sd->id);
397              ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
398              ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
399              ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
400              break;
401          case CCW_DEVTYPE_VFIO:
402              ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
403              ipl->iplb.pbt = S390_IPL_TYPE_CCW;
404              ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
405              ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
406              break;
407          case CCW_DEVTYPE_VIRTIO_NET:
408              ipl->netboot = true;
409              /* Fall through to CCW_DEVTYPE_VIRTIO case */
410          case CCW_DEVTYPE_VIRTIO:
411              ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
412              ipl->iplb.blk0_len =
413                  cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
414              ipl->iplb.pbt = S390_IPL_TYPE_CCW;
415              ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
416              ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
417              break;
418          }
419  
420          if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
421              ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
422          }
423  
424          return true;
425      }
426  
427      return false;
428  }
429  
430  int s390_ipl_set_loadparm(uint8_t *loadparm)
431  {
432      MachineState *machine = MACHINE(qdev_get_machine());
433      char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
434  
435      if (lp) {
436          int i;
437  
438          /* lp is an uppercase string without leading/embedded spaces */
439          for (i = 0; i < 8 && lp[i]; i++) {
440              loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
441          }
442  
443          if (i < 8) {
444              memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
445          }
446  
447          g_free(lp);
448          return 0;
449      }
450  
451      return -1;
452  }
453  
454  static int load_netboot_image(Error **errp)
455  {
456      S390IPLState *ipl = get_ipl_device();
457      char *netboot_filename;
458      MemoryRegion *sysmem =  get_system_memory();
459      MemoryRegion *mr = NULL;
460      void *ram_ptr = NULL;
461      int img_size = -1;
462  
463      mr = memory_region_find(sysmem, 0, 1).mr;
464      if (!mr) {
465          error_setg(errp, "Failed to find memory region at address 0");
466          return -1;
467      }
468  
469      ram_ptr = memory_region_get_ram_ptr(mr);
470      if (!ram_ptr) {
471          error_setg(errp, "No RAM found");
472          goto unref_mr;
473      }
474  
475      netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
476      if (netboot_filename == NULL) {
477          error_setg(errp, "Could not find network bootloader '%s'",
478                     ipl->netboot_fw);
479          goto unref_mr;
480      }
481  
482      img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
483                              &ipl->start_addr,
484                              NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL,
485                              false);
486  
487      if (img_size < 0) {
488          img_size = load_image_size(netboot_filename, ram_ptr, ram_size);
489          ipl->start_addr = KERN_IMAGE_START;
490      }
491  
492      if (img_size < 0) {
493          error_setg(errp, "Failed to load network bootloader");
494      }
495  
496      g_free(netboot_filename);
497  
498  unref_mr:
499      memory_region_unref(mr);
500      return img_size;
501  }
502  
503  static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
504                                           int virtio_id)
505  {
506      uint8_t cssid;
507      uint8_t ssid;
508      uint16_t devno;
509      uint16_t schid;
510      SubchDev *sch = NULL;
511  
512      if (iplb->pbt != S390_IPL_TYPE_CCW) {
513          return false;
514      }
515  
516      devno = be16_to_cpu(iplb->ccw.devno);
517      ssid = iplb->ccw.ssid & 3;
518  
519      for (schid = 0; schid < MAX_SCHID; schid++) {
520          for (cssid = 0; cssid < MAX_CSSID; cssid++) {
521              sch = css_find_subch(1, cssid, ssid, schid);
522  
523              if (sch && sch->devno == devno) {
524                  return sch->id.cu_model == virtio_id;
525              }
526          }
527      }
528      return false;
529  }
530  
531  static bool is_virtio_net_device(IplParameterBlock *iplb)
532  {
533      return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
534  }
535  
536  static bool is_virtio_scsi_device(IplParameterBlock *iplb)
537  {
538      return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
539  }
540  
541  void s390_ipl_update_diag308(IplParameterBlock *iplb)
542  {
543      S390IPLState *ipl = get_ipl_device();
544  
545      ipl->iplb = *iplb;
546      ipl->iplb_valid = true;
547      ipl->netboot = is_virtio_net_device(iplb);
548  }
549  
550  IplParameterBlock *s390_ipl_get_iplb(void)
551  {
552      S390IPLState *ipl = get_ipl_device();
553  
554      if (!ipl->iplb_valid) {
555          return NULL;
556      }
557      return &ipl->iplb;
558  }
559  
560  void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
561  {
562      S390IPLState *ipl = get_ipl_device();
563  
564      if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
565          /* use CPU 0 for full resets */
566          ipl->reset_cpu_index = 0;
567      } else {
568          ipl->reset_cpu_index = cs->cpu_index;
569      }
570      ipl->reset_type = reset_type;
571  
572      if (reset_type == S390_RESET_REIPL &&
573          ipl->iplb_valid &&
574          !ipl->netboot &&
575          ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
576          is_virtio_scsi_device(&ipl->iplb)) {
577          CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
578  
579          if (ccw_dev &&
580              cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
581              (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
582              /*
583               * this is the original boot device's SCSI
584               * so restore IPL parameter info from it
585               */
586              ipl->iplb_valid = s390_gen_initial_iplb(ipl);
587          }
588      }
589      if (reset_type == S390_RESET_MODIFIED_CLEAR ||
590          reset_type == S390_RESET_LOAD_NORMAL) {
591          /* ignore -no-reboot, send no event  */
592          qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
593      } else {
594          qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
595      }
596      /* as this is triggered by a CPU, make sure to exit the loop */
597      if (tcg_enabled()) {
598          cpu_loop_exit(cs);
599      }
600  }
601  
602  void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
603  {
604      S390IPLState *ipl = get_ipl_device();
605  
606      *cs = qemu_get_cpu(ipl->reset_cpu_index);
607      if (!*cs) {
608          /* use any CPU */
609          *cs = first_cpu;
610      }
611      *reset_type = ipl->reset_type;
612  }
613  
614  void s390_ipl_clear_reset_request(void)
615  {
616      S390IPLState *ipl = get_ipl_device();
617  
618      ipl->reset_type = S390_RESET_EXTERNAL;
619      /* use CPU 0 for full resets */
620      ipl->reset_cpu_index = 0;
621  }
622  
623  static void s390_ipl_prepare_qipl(S390CPU *cpu)
624  {
625      S390IPLState *ipl = get_ipl_device();
626      uint8_t *addr;
627      uint64_t len = 4096;
628  
629      addr = cpu_physical_memory_map(cpu->env.psa, &len, 1);
630      if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
631          error_report("Cannot set QEMU IPL parameters");
632          return;
633      }
634      memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
635      cpu_physical_memory_unmap(addr, len, 1, len);
636  }
637  
638  void s390_ipl_prepare_cpu(S390CPU *cpu)
639  {
640      S390IPLState *ipl = get_ipl_device();
641      Error *err = NULL;
642  
643      cpu->env.psw.addr = ipl->start_addr;
644      cpu->env.psw.mask = IPL_PSW_MASK;
645  
646      if (!ipl->kernel || ipl->iplb_valid) {
647          cpu->env.psw.addr = ipl->bios_start_addr;
648          if (!ipl->iplb_valid) {
649              ipl->iplb_valid = s390_gen_initial_iplb(ipl);
650          }
651      }
652      if (ipl->netboot) {
653          if (load_netboot_image(&err) < 0) {
654              error_report_err(err);
655              exit(1);
656          }
657          ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
658      }
659      s390_ipl_set_boot_menu(ipl);
660      s390_ipl_prepare_qipl(cpu);
661  }
662  
663  static void s390_ipl_reset(DeviceState *dev)
664  {
665      S390IPLState *ipl = S390_IPL(dev);
666  
667      if (ipl->reset_type != S390_RESET_REIPL) {
668          ipl->iplb_valid = false;
669          memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
670      }
671  }
672  
673  static void s390_ipl_class_init(ObjectClass *klass, void *data)
674  {
675      DeviceClass *dc = DEVICE_CLASS(klass);
676  
677      dc->realize = s390_ipl_realize;
678      device_class_set_props(dc, s390_ipl_properties);
679      dc->reset = s390_ipl_reset;
680      dc->vmsd = &vmstate_ipl;
681      set_bit(DEVICE_CATEGORY_MISC, dc->categories);
682      /* Reason: Loads the ROMs and thus can only be used one time - internally */
683      dc->user_creatable = false;
684  }
685  
686  static const TypeInfo s390_ipl_info = {
687      .class_init = s390_ipl_class_init,
688      .parent = TYPE_DEVICE,
689      .name  = TYPE_S390_IPL,
690      .instance_size  = sizeof(S390IPLState),
691  };
692  
693  static void s390_ipl_register_types(void)
694  {
695      type_register_static(&s390_ipl_info);
696  }
697  
698  type_init(s390_ipl_register_types)
699