xref: /openbmc/qemu/hw/s390x/ipl.c (revision d5938f29fea29581725426f203a74da746ca03e7)
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/sysemu.h"
19 #include "sysemu/tcg.h"
20 #include "cpu.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 "ipl.h"
30 #include "qemu/error-report.h"
31 #include "qemu/config-file.h"
32 #include "qemu/cutils.h"
33 #include "qemu/option.h"
34 #include "exec/exec-all.h"
35 
36 #define KERN_IMAGE_START                0x010000UL
37 #define LINUX_MAGIC_ADDR                0x010008UL
38 #define KERN_PARM_AREA                  0x010480UL
39 #define INITRD_START                    0x800000UL
40 #define INITRD_PARM_START               0x010408UL
41 #define PARMFILE_START                  0x001000UL
42 #define ZIPL_IMAGE_START                0x009000UL
43 #define IPL_PSW_MASK                    (PSW_MASK_32 | PSW_MASK_64)
44 
45 static bool iplb_extended_needed(void *opaque)
46 {
47     S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
48 
49     return ipl->iplbext_migration;
50 }
51 
52 static const VMStateDescription vmstate_iplb_extended = {
53     .name = "ipl/iplb_extended",
54     .version_id = 0,
55     .minimum_version_id = 0,
56     .needed = iplb_extended_needed,
57     .fields = (VMStateField[]) {
58         VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
59         VMSTATE_END_OF_LIST()
60     }
61 };
62 
63 static const VMStateDescription vmstate_iplb = {
64     .name = "ipl/iplb",
65     .version_id = 0,
66     .minimum_version_id = 0,
67     .fields = (VMStateField[]) {
68         VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
69         VMSTATE_UINT16(devno, IplParameterBlock),
70         VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
71         VMSTATE_END_OF_LIST()
72     },
73     .subsections = (const VMStateDescription*[]) {
74         &vmstate_iplb_extended,
75         NULL
76     }
77 };
78 
79 static const VMStateDescription vmstate_ipl = {
80     .name = "ipl",
81     .version_id = 0,
82     .minimum_version_id = 0,
83     .fields = (VMStateField[]) {
84         VMSTATE_UINT64(compat_start_addr, S390IPLState),
85         VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
86         VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
87         VMSTATE_BOOL(iplb_valid, S390IPLState),
88         VMSTATE_UINT8(cssid, S390IPLState),
89         VMSTATE_UINT8(ssid, S390IPLState),
90         VMSTATE_UINT16(devno, S390IPLState),
91         VMSTATE_END_OF_LIST()
92      }
93 };
94 
95 static S390IPLState *get_ipl_device(void)
96 {
97     return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
98 }
99 
100 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
101 {
102     uint64_t dstaddr = *(uint64_t *) opaque;
103     /*
104      * Assuming that our s390-ccw.img was linked for starting at address 0,
105      * we can simply add the destination address for the final location
106      */
107     return srcaddr + dstaddr;
108 }
109 
110 static void s390_ipl_realize(DeviceState *dev, Error **errp)
111 {
112     S390IPLState *ipl = S390_IPL(dev);
113     uint32_t *ipl_psw;
114     uint64_t pentry;
115     char *magic;
116     int kernel_size;
117     Error *err = NULL;
118 
119     int bios_size;
120     char *bios_filename;
121 
122     /*
123      * Always load the bios if it was enforced,
124      * even if an external kernel has been defined.
125      */
126     if (!ipl->kernel || ipl->enforce_bios) {
127         uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
128 
129         if (bios_name == NULL) {
130             bios_name = ipl->firmware;
131         }
132 
133         bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
134         if (bios_filename == NULL) {
135             error_setg(&err, "could not find stage1 bootloader");
136             goto error;
137         }
138 
139         bios_size = load_elf(bios_filename, NULL,
140                              bios_translate_addr, &fwbase,
141                              &ipl->bios_start_addr, NULL, NULL, 1,
142                              EM_S390, 0, 0);
143         if (bios_size > 0) {
144             /* Adjust ELF start address to final location */
145             ipl->bios_start_addr += fwbase;
146         } else {
147             /* Try to load non-ELF file */
148             bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
149                                             4096);
150             ipl->bios_start_addr = ZIPL_IMAGE_START;
151         }
152         g_free(bios_filename);
153 
154         if (bios_size == -1) {
155             error_setg(&err, "could not load bootloader '%s'", bios_name);
156             goto error;
157         }
158 
159         /* default boot target is the bios */
160         ipl->start_addr = ipl->bios_start_addr;
161     }
162 
163     if (ipl->kernel) {
164         kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL,
165                                &pentry, NULL,
166                                NULL, 1, EM_S390, 0, 0);
167         if (kernel_size < 0) {
168             kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
169             if (kernel_size < 0) {
170                 error_setg(&err, "could not load kernel '%s'", ipl->kernel);
171                 goto error;
172             }
173             /* if this is Linux use KERN_IMAGE_START */
174             magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
175             if (magic && !memcmp(magic, "S390EP", 6)) {
176                 pentry = KERN_IMAGE_START;
177             } else {
178                 /* if not Linux load the address of the (short) IPL PSW */
179                 ipl_psw = rom_ptr(4, 4);
180                 if (ipl_psw) {
181                     pentry = be32_to_cpu(*ipl_psw) & 0x7fffffffUL;
182                 } else {
183                     error_setg(&err, "Could not get IPL PSW");
184                     goto error;
185                 }
186             }
187         }
188         /*
189          * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
190          * kernel parameters here as well. Note: For old kernels (up to 3.2)
191          * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
192          * loader) and it won't work. For this case we force it to 0x10000, too.
193          */
194         if (pentry == KERN_IMAGE_START || pentry == 0x800) {
195             char *parm_area = rom_ptr(KERN_PARM_AREA, strlen(ipl->cmdline) + 1);
196             ipl->start_addr = KERN_IMAGE_START;
197             /* Overwrite parameters in the kernel image, which are "rom" */
198             if (parm_area) {
199                 strcpy(parm_area, ipl->cmdline);
200             }
201         } else {
202             ipl->start_addr = pentry;
203         }
204 
205         if (ipl->initrd) {
206             ram_addr_t initrd_offset;
207             int initrd_size;
208             uint64_t *romptr;
209 
210             initrd_offset = INITRD_START;
211             while (kernel_size + 0x100000 > initrd_offset) {
212                 initrd_offset += 0x100000;
213             }
214             initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
215                                               ram_size - initrd_offset);
216             if (initrd_size == -1) {
217                 error_setg(&err, "could not load initrd '%s'", ipl->initrd);
218                 goto error;
219             }
220 
221             /*
222              * we have to overwrite values in the kernel image,
223              * which are "rom"
224              */
225             romptr = rom_ptr(INITRD_PARM_START, 16);
226             if (romptr) {
227                 stq_p(romptr, initrd_offset);
228                 stq_p(romptr + 1, initrd_size);
229             }
230         }
231     }
232     /*
233      * Don't ever use the migrated values, they could come from a different
234      * BIOS and therefore don't work. But still migrate the values, so
235      * QEMUs relying on it don't break.
236      */
237     ipl->compat_start_addr = ipl->start_addr;
238     ipl->compat_bios_start_addr = ipl->bios_start_addr;
239     qemu_register_reset(qdev_reset_all_fn, dev);
240 error:
241     error_propagate(errp, err);
242 }
243 
244 static Property s390_ipl_properties[] = {
245     DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
246     DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
247     DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
248     DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
249     DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
250     DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
251     DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
252                      true),
253     DEFINE_PROP_END_OF_LIST(),
254 };
255 
256 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
257 {
258     QemuOptsList *plist = qemu_find_opts("boot-opts");
259     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
260     const char *tmp;
261     unsigned long splash_time = 0;
262 
263     if (!get_boot_device(0)) {
264         if (boot_menu) {
265             error_report("boot menu requires a bootindex to be specified for "
266                          "the IPL device");
267         }
268         return;
269     }
270 
271     switch (ipl->iplb.pbt) {
272     case S390_IPL_TYPE_CCW:
273         /* In the absence of -boot menu, use zipl parameters */
274         if (!qemu_opt_get(opts, "menu")) {
275             ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
276             return;
277         }
278         break;
279     case S390_IPL_TYPE_QEMU_SCSI:
280         break;
281     default:
282         if (boot_menu) {
283             error_report("boot menu is not supported for this device type");
284         }
285         return;
286     }
287 
288     if (!boot_menu) {
289         return;
290     }
291 
292     ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
293 
294     tmp = qemu_opt_get(opts, "splash-time");
295 
296     if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
297         error_report("splash-time is invalid, forcing it to 0");
298         ipl->qipl.boot_menu_timeout = 0;
299         return;
300     }
301 
302     if (splash_time > 0xffffffff) {
303         error_report("splash-time is too large, forcing it to max value");
304         ipl->qipl.boot_menu_timeout = 0xffffffff;
305         return;
306     }
307 
308     ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
309 }
310 
311 #define CCW_DEVTYPE_NONE        0x00
312 #define CCW_DEVTYPE_VIRTIO      0x01
313 #define CCW_DEVTYPE_VIRTIO_NET  0x02
314 #define CCW_DEVTYPE_SCSI        0x03
315 #define CCW_DEVTYPE_VFIO        0x04
316 
317 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
318 {
319     CcwDevice *ccw_dev = NULL;
320     int tmp_dt = CCW_DEVTYPE_NONE;
321 
322     if (dev_st) {
323         VirtIONet *virtio_net_dev = (VirtIONet *)
324             object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
325         VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
326             object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
327                                 TYPE_VIRTIO_CCW_DEVICE);
328         VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
329             object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
330 
331         if (virtio_ccw_dev) {
332             ccw_dev = CCW_DEVICE(virtio_ccw_dev);
333             if (virtio_net_dev) {
334                 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
335             } else {
336                 tmp_dt = CCW_DEVTYPE_VIRTIO;
337             }
338         } else if (vfio_ccw_dev) {
339             ccw_dev = CCW_DEVICE(vfio_ccw_dev);
340             tmp_dt = CCW_DEVTYPE_VFIO;
341         } else {
342             SCSIDevice *sd = (SCSIDevice *)
343                 object_dynamic_cast(OBJECT(dev_st),
344                                     TYPE_SCSI_DEVICE);
345             if (sd) {
346                 SCSIBus *bus = scsi_bus_from_device(sd);
347                 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
348                 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
349                                                        vdev);
350 
351                 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
352                                                            TYPE_CCW_DEVICE);
353                 tmp_dt = CCW_DEVTYPE_SCSI;
354             }
355         }
356     }
357     if (devtype) {
358         *devtype = tmp_dt;
359     }
360     return ccw_dev;
361 }
362 
363 static bool s390_gen_initial_iplb(S390IPLState *ipl)
364 {
365     DeviceState *dev_st;
366     CcwDevice *ccw_dev = NULL;
367     SCSIDevice *sd;
368     int devtype;
369 
370     dev_st = get_boot_device(0);
371     if (dev_st) {
372         ccw_dev = s390_get_ccw_device(dev_st, &devtype);
373     }
374 
375     /*
376      * Currently allow IPL only from CCW devices.
377      */
378     if (ccw_dev) {
379         switch (devtype) {
380         case CCW_DEVTYPE_SCSI:
381             sd = SCSI_DEVICE(dev_st);
382             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
383             ipl->iplb.blk0_len =
384                 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
385             ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
386             ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
387             ipl->iplb.scsi.target = cpu_to_be16(sd->id);
388             ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
389             ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
390             ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
391             break;
392         case CCW_DEVTYPE_VFIO:
393             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
394             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
395             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
396             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
397             break;
398         case CCW_DEVTYPE_VIRTIO_NET:
399             ipl->netboot = true;
400             /* Fall through to CCW_DEVTYPE_VIRTIO case */
401         case CCW_DEVTYPE_VIRTIO:
402             ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
403             ipl->iplb.blk0_len =
404                 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
405             ipl->iplb.pbt = S390_IPL_TYPE_CCW;
406             ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
407             ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
408             break;
409         }
410 
411         if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
412             ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
413         }
414 
415         return true;
416     }
417 
418     return false;
419 }
420 
421 int s390_ipl_set_loadparm(uint8_t *loadparm)
422 {
423     MachineState *machine = MACHINE(qdev_get_machine());
424     char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
425 
426     if (lp) {
427         int i;
428 
429         /* lp is an uppercase string without leading/embedded spaces */
430         for (i = 0; i < 8 && lp[i]; i++) {
431             loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
432         }
433 
434         if (i < 8) {
435             memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
436         }
437 
438         g_free(lp);
439         return 0;
440     }
441 
442     return -1;
443 }
444 
445 static int load_netboot_image(Error **errp)
446 {
447     S390IPLState *ipl = get_ipl_device();
448     char *netboot_filename;
449     MemoryRegion *sysmem =  get_system_memory();
450     MemoryRegion *mr = NULL;
451     void *ram_ptr = NULL;
452     int img_size = -1;
453 
454     mr = memory_region_find(sysmem, 0, 1).mr;
455     if (!mr) {
456         error_setg(errp, "Failed to find memory region at address 0");
457         return -1;
458     }
459 
460     ram_ptr = memory_region_get_ram_ptr(mr);
461     if (!ram_ptr) {
462         error_setg(errp, "No RAM found");
463         goto unref_mr;
464     }
465 
466     netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
467     if (netboot_filename == NULL) {
468         error_setg(errp, "Could not find network bootloader '%s'",
469                    ipl->netboot_fw);
470         goto unref_mr;
471     }
472 
473     img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
474                             &ipl->start_addr,
475                             NULL, NULL, 1, EM_S390, 0, 0, NULL, false);
476 
477     if (img_size < 0) {
478         img_size = load_image_size(netboot_filename, ram_ptr, ram_size);
479         ipl->start_addr = KERN_IMAGE_START;
480     }
481 
482     if (img_size < 0) {
483         error_setg(errp, "Failed to load network bootloader");
484     }
485 
486     g_free(netboot_filename);
487 
488 unref_mr:
489     memory_region_unref(mr);
490     return img_size;
491 }
492 
493 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
494                                          int virtio_id)
495 {
496     uint8_t cssid;
497     uint8_t ssid;
498     uint16_t devno;
499     uint16_t schid;
500     SubchDev *sch = NULL;
501 
502     if (iplb->pbt != S390_IPL_TYPE_CCW) {
503         return false;
504     }
505 
506     devno = be16_to_cpu(iplb->ccw.devno);
507     ssid = iplb->ccw.ssid & 3;
508 
509     for (schid = 0; schid < MAX_SCHID; schid++) {
510         for (cssid = 0; cssid < MAX_CSSID; cssid++) {
511             sch = css_find_subch(1, cssid, ssid, schid);
512 
513             if (sch && sch->devno == devno) {
514                 return sch->id.cu_model == virtio_id;
515             }
516         }
517     }
518     return false;
519 }
520 
521 static bool is_virtio_net_device(IplParameterBlock *iplb)
522 {
523     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
524 }
525 
526 static bool is_virtio_scsi_device(IplParameterBlock *iplb)
527 {
528     return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
529 }
530 
531 void s390_ipl_update_diag308(IplParameterBlock *iplb)
532 {
533     S390IPLState *ipl = get_ipl_device();
534 
535     ipl->iplb = *iplb;
536     ipl->iplb_valid = true;
537     ipl->netboot = is_virtio_net_device(iplb);
538 }
539 
540 IplParameterBlock *s390_ipl_get_iplb(void)
541 {
542     S390IPLState *ipl = get_ipl_device();
543 
544     if (!ipl->iplb_valid) {
545         return NULL;
546     }
547     return &ipl->iplb;
548 }
549 
550 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
551 {
552     S390IPLState *ipl = get_ipl_device();
553 
554     if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
555         /* use CPU 0 for full resets */
556         ipl->reset_cpu_index = 0;
557     } else {
558         ipl->reset_cpu_index = cs->cpu_index;
559     }
560     ipl->reset_type = reset_type;
561 
562     if (reset_type == S390_RESET_REIPL &&
563         ipl->iplb_valid &&
564         !ipl->netboot &&
565         ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
566         is_virtio_scsi_device(&ipl->iplb)) {
567         CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
568 
569         if (ccw_dev &&
570             cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
571             (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
572             /*
573              * this is the original boot device's SCSI
574              * so restore IPL parameter info from it
575              */
576             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
577         }
578     }
579     if (reset_type == S390_RESET_MODIFIED_CLEAR ||
580         reset_type == S390_RESET_LOAD_NORMAL) {
581         /* ignore -no-reboot, send no event  */
582         qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
583     } else {
584         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
585     }
586     /* as this is triggered by a CPU, make sure to exit the loop */
587     if (tcg_enabled()) {
588         cpu_loop_exit(cs);
589     }
590 }
591 
592 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
593 {
594     S390IPLState *ipl = get_ipl_device();
595 
596     *cs = qemu_get_cpu(ipl->reset_cpu_index);
597     if (!*cs) {
598         /* use any CPU */
599         *cs = first_cpu;
600     }
601     *reset_type = ipl->reset_type;
602 }
603 
604 void s390_ipl_clear_reset_request(void)
605 {
606     S390IPLState *ipl = get_ipl_device();
607 
608     ipl->reset_type = S390_RESET_EXTERNAL;
609     /* use CPU 0 for full resets */
610     ipl->reset_cpu_index = 0;
611 }
612 
613 static void s390_ipl_prepare_qipl(S390CPU *cpu)
614 {
615     S390IPLState *ipl = get_ipl_device();
616     uint8_t *addr;
617     uint64_t len = 4096;
618 
619     addr = cpu_physical_memory_map(cpu->env.psa, &len, 1);
620     if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
621         error_report("Cannot set QEMU IPL parameters");
622         return;
623     }
624     memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
625     cpu_physical_memory_unmap(addr, len, 1, len);
626 }
627 
628 void s390_ipl_prepare_cpu(S390CPU *cpu)
629 {
630     S390IPLState *ipl = get_ipl_device();
631     Error *err = NULL;
632 
633     cpu->env.psw.addr = ipl->start_addr;
634     cpu->env.psw.mask = IPL_PSW_MASK;
635 
636     if (!ipl->kernel || ipl->iplb_valid) {
637         cpu->env.psw.addr = ipl->bios_start_addr;
638         if (!ipl->iplb_valid) {
639             ipl->iplb_valid = s390_gen_initial_iplb(ipl);
640         }
641     }
642     if (ipl->netboot) {
643         if (load_netboot_image(&err) < 0) {
644             error_report_err(err);
645             exit(1);
646         }
647         ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
648     }
649     s390_ipl_set_boot_menu(ipl);
650     s390_ipl_prepare_qipl(cpu);
651 }
652 
653 static void s390_ipl_reset(DeviceState *dev)
654 {
655     S390IPLState *ipl = S390_IPL(dev);
656 
657     if (ipl->reset_type != S390_RESET_REIPL) {
658         ipl->iplb_valid = false;
659         memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
660     }
661 }
662 
663 static void s390_ipl_class_init(ObjectClass *klass, void *data)
664 {
665     DeviceClass *dc = DEVICE_CLASS(klass);
666 
667     dc->realize = s390_ipl_realize;
668     dc->props = s390_ipl_properties;
669     dc->reset = s390_ipl_reset;
670     dc->vmsd = &vmstate_ipl;
671     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
672     /* Reason: Loads the ROMs and thus can only be used one time - internally */
673     dc->user_creatable = false;
674 }
675 
676 static const TypeInfo s390_ipl_info = {
677     .class_init = s390_ipl_class_init,
678     .parent = TYPE_DEVICE,
679     .name  = TYPE_S390_IPL,
680     .instance_size  = sizeof(S390IPLState),
681 };
682 
683 static void s390_ipl_register_types(void)
684 {
685     type_register_static(&s390_ipl_info);
686 }
687 
688 type_init(s390_ipl_register_types)
689