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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
46static 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
53static 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
64static 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
80static 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
96static S390IPLState *get_ipl_device(void)
97{
98 return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
99}
100
101static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
102{
103 uint64_t dstaddr = *(uint64_t *) opaque;
104
105
106
107
108 return srcaddr + dstaddr;
109}
110
111static 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
125
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, 1,
143 EM_S390, 0, 0);
144 if (bios_size > 0) {
145
146 ipl->bios_start_addr += fwbase;
147 } else {
148
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
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, 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
175 magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
176 if (magic && !memcmp(magic, "S390EP", 6)) {
177 pentry = KERN_IMAGE_START;
178 } else {
179
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
191
192
193
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
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
224
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
235
236
237
238 ipl->compat_start_addr = ipl->start_addr;
239 ipl->compat_bios_start_addr = ipl->bios_start_addr;
240 qemu_register_reset(qdev_reset_all_fn, dev);
241error:
242 error_propagate(errp, err);
243}
244
245static Property s390_ipl_properties[] = {
246 DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
247 DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
248 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
249 DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
250 DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
251 DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
252 DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
253 true),
254 DEFINE_PROP_END_OF_LIST(),
255};
256
257static void s390_ipl_set_boot_menu(S390IPLState *ipl)
258{
259 QemuOptsList *plist = qemu_find_opts("boot-opts");
260 QemuOpts *opts = QTAILQ_FIRST(&plist->head);
261 const char *tmp;
262 unsigned long splash_time = 0;
263
264 if (!get_boot_device(0)) {
265 if (boot_menu) {
266 error_report("boot menu requires a bootindex to be specified for "
267 "the IPL device");
268 }
269 return;
270 }
271
272 switch (ipl->iplb.pbt) {
273 case S390_IPL_TYPE_CCW:
274
275 if (!qemu_opt_get(opts, "menu")) {
276 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
277 return;
278 }
279 break;
280 case S390_IPL_TYPE_QEMU_SCSI:
281 break;
282 default:
283 if (boot_menu) {
284 error_report("boot menu is not supported for this device type");
285 }
286 return;
287 }
288
289 if (!boot_menu) {
290 return;
291 }
292
293 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
294
295 tmp = qemu_opt_get(opts, "splash-time");
296
297 if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
298 error_report("splash-time is invalid, forcing it to 0");
299 ipl->qipl.boot_menu_timeout = 0;
300 return;
301 }
302
303 if (splash_time > 0xffffffff) {
304 error_report("splash-time is too large, forcing it to max value");
305 ipl->qipl.boot_menu_timeout = 0xffffffff;
306 return;
307 }
308
309 ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
310}
311
312#define CCW_DEVTYPE_NONE 0x00
313#define CCW_DEVTYPE_VIRTIO 0x01
314#define CCW_DEVTYPE_VIRTIO_NET 0x02
315#define CCW_DEVTYPE_SCSI 0x03
316#define CCW_DEVTYPE_VFIO 0x04
317
318static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
319{
320 CcwDevice *ccw_dev = NULL;
321 int tmp_dt = CCW_DEVTYPE_NONE;
322
323 if (dev_st) {
324 VirtIONet *virtio_net_dev = (VirtIONet *)
325 object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
326 VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
327 object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
328 TYPE_VIRTIO_CCW_DEVICE);
329 VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
330 object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
331
332 if (virtio_ccw_dev) {
333 ccw_dev = CCW_DEVICE(virtio_ccw_dev);
334 if (virtio_net_dev) {
335 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
336 } else {
337 tmp_dt = CCW_DEVTYPE_VIRTIO;
338 }
339 } else if (vfio_ccw_dev) {
340 ccw_dev = CCW_DEVICE(vfio_ccw_dev);
341 tmp_dt = CCW_DEVTYPE_VFIO;
342 } else {
343 SCSIDevice *sd = (SCSIDevice *)
344 object_dynamic_cast(OBJECT(dev_st),
345 TYPE_SCSI_DEVICE);
346 if (sd) {
347 SCSIBus *bus = scsi_bus_from_device(sd);
348 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
349 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
350 vdev);
351
352 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
353 TYPE_CCW_DEVICE);
354 tmp_dt = CCW_DEVTYPE_SCSI;
355 }
356 }
357 }
358 if (devtype) {
359 *devtype = tmp_dt;
360 }
361 return ccw_dev;
362}
363
364static bool s390_gen_initial_iplb(S390IPLState *ipl)
365{
366 DeviceState *dev_st;
367 CcwDevice *ccw_dev = NULL;
368 SCSIDevice *sd;
369 int devtype;
370
371 dev_st = get_boot_device(0);
372 if (dev_st) {
373 ccw_dev = s390_get_ccw_device(dev_st, &devtype);
374 }
375
376
377
378
379 if (ccw_dev) {
380 switch (devtype) {
381 case CCW_DEVTYPE_SCSI:
382 sd = SCSI_DEVICE(dev_st);
383 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
384 ipl->iplb.blk0_len =
385 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
386 ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
387 ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
388 ipl->iplb.scsi.target = cpu_to_be16(sd->id);
389 ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
390 ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
391 ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
392 break;
393 case CCW_DEVTYPE_VFIO:
394 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
395 ipl->iplb.pbt = S390_IPL_TYPE_CCW;
396 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
397 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
398 break;
399 case CCW_DEVTYPE_VIRTIO_NET:
400 ipl->netboot = true;
401
402 case CCW_DEVTYPE_VIRTIO:
403 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
404 ipl->iplb.blk0_len =
405 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
406 ipl->iplb.pbt = S390_IPL_TYPE_CCW;
407 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
408 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
409 break;
410 }
411
412 if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
413 ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
414 }
415
416 return true;
417 }
418
419 return false;
420}
421
422int s390_ipl_set_loadparm(uint8_t *loadparm)
423{
424 MachineState *machine = MACHINE(qdev_get_machine());
425 char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
426
427 if (lp) {
428 int i;
429
430
431 for (i = 0; i < 8 && lp[i]; i++) {
432 loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
433 }
434
435 if (i < 8) {
436 memset(loadparm + i, 0x40, 8 - i);
437 }
438
439 g_free(lp);
440 return 0;
441 }
442
443 return -1;
444}
445
446static int load_netboot_image(Error **errp)
447{
448 S390IPLState *ipl = get_ipl_device();
449 char *netboot_filename;
450 MemoryRegion *sysmem = get_system_memory();
451 MemoryRegion *mr = NULL;
452 void *ram_ptr = NULL;
453 int img_size = -1;
454
455 mr = memory_region_find(sysmem, 0, 1).mr;
456 if (!mr) {
457 error_setg(errp, "Failed to find memory region at address 0");
458 return -1;
459 }
460
461 ram_ptr = memory_region_get_ram_ptr(mr);
462 if (!ram_ptr) {
463 error_setg(errp, "No RAM found");
464 goto unref_mr;
465 }
466
467 netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
468 if (netboot_filename == NULL) {
469 error_setg(errp, "Could not find network bootloader '%s'",
470 ipl->netboot_fw);
471 goto unref_mr;
472 }
473
474 img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
475 &ipl->start_addr,
476 NULL, NULL, 1, EM_S390, 0, 0, NULL, false);
477
478 if (img_size < 0) {
479 img_size = load_image_size(netboot_filename, ram_ptr, ram_size);
480 ipl->start_addr = KERN_IMAGE_START;
481 }
482
483 if (img_size < 0) {
484 error_setg(errp, "Failed to load network bootloader");
485 }
486
487 g_free(netboot_filename);
488
489unref_mr:
490 memory_region_unref(mr);
491 return img_size;
492}
493
494static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
495 int virtio_id)
496{
497 uint8_t cssid;
498 uint8_t ssid;
499 uint16_t devno;
500 uint16_t schid;
501 SubchDev *sch = NULL;
502
503 if (iplb->pbt != S390_IPL_TYPE_CCW) {
504 return false;
505 }
506
507 devno = be16_to_cpu(iplb->ccw.devno);
508 ssid = iplb->ccw.ssid & 3;
509
510 for (schid = 0; schid < MAX_SCHID; schid++) {
511 for (cssid = 0; cssid < MAX_CSSID; cssid++) {
512 sch = css_find_subch(1, cssid, ssid, schid);
513
514 if (sch && sch->devno == devno) {
515 return sch->id.cu_model == virtio_id;
516 }
517 }
518 }
519 return false;
520}
521
522static bool is_virtio_net_device(IplParameterBlock *iplb)
523{
524 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
525}
526
527static bool is_virtio_scsi_device(IplParameterBlock *iplb)
528{
529 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
530}
531
532void s390_ipl_update_diag308(IplParameterBlock *iplb)
533{
534 S390IPLState *ipl = get_ipl_device();
535
536 ipl->iplb = *iplb;
537 ipl->iplb_valid = true;
538 ipl->netboot = is_virtio_net_device(iplb);
539}
540
541IplParameterBlock *s390_ipl_get_iplb(void)
542{
543 S390IPLState *ipl = get_ipl_device();
544
545 if (!ipl->iplb_valid) {
546 return NULL;
547 }
548 return &ipl->iplb;
549}
550
551void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
552{
553 S390IPLState *ipl = get_ipl_device();
554
555 if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
556
557 ipl->reset_cpu_index = 0;
558 } else {
559 ipl->reset_cpu_index = cs->cpu_index;
560 }
561 ipl->reset_type = reset_type;
562
563 if (reset_type == S390_RESET_REIPL &&
564 ipl->iplb_valid &&
565 !ipl->netboot &&
566 ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
567 is_virtio_scsi_device(&ipl->iplb)) {
568 CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
569
570 if (ccw_dev &&
571 cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
572 (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
573
574
575
576
577 ipl->iplb_valid = s390_gen_initial_iplb(ipl);
578 }
579 }
580 if (reset_type == S390_RESET_MODIFIED_CLEAR ||
581 reset_type == S390_RESET_LOAD_NORMAL) {
582
583 qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
584 } else {
585 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
586 }
587
588 if (tcg_enabled()) {
589 cpu_loop_exit(cs);
590 }
591}
592
593void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
594{
595 S390IPLState *ipl = get_ipl_device();
596
597 *cs = qemu_get_cpu(ipl->reset_cpu_index);
598 if (!*cs) {
599
600 *cs = first_cpu;
601 }
602 *reset_type = ipl->reset_type;
603}
604
605void s390_ipl_clear_reset_request(void)
606{
607 S390IPLState *ipl = get_ipl_device();
608
609 ipl->reset_type = S390_RESET_EXTERNAL;
610
611 ipl->reset_cpu_index = 0;
612}
613
614static void s390_ipl_prepare_qipl(S390CPU *cpu)
615{
616 S390IPLState *ipl = get_ipl_device();
617 uint8_t *addr;
618 uint64_t len = 4096;
619
620 addr = cpu_physical_memory_map(cpu->env.psa, &len, 1);
621 if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
622 error_report("Cannot set QEMU IPL parameters");
623 return;
624 }
625 memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
626 cpu_physical_memory_unmap(addr, len, 1, len);
627}
628
629void s390_ipl_prepare_cpu(S390CPU *cpu)
630{
631 S390IPLState *ipl = get_ipl_device();
632 Error *err = NULL;
633
634 cpu->env.psw.addr = ipl->start_addr;
635 cpu->env.psw.mask = IPL_PSW_MASK;
636
637 if (!ipl->kernel || ipl->iplb_valid) {
638 cpu->env.psw.addr = ipl->bios_start_addr;
639 if (!ipl->iplb_valid) {
640 ipl->iplb_valid = s390_gen_initial_iplb(ipl);
641 }
642 }
643 if (ipl->netboot) {
644 if (load_netboot_image(&err) < 0) {
645 error_report_err(err);
646 exit(1);
647 }
648 ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
649 }
650 s390_ipl_set_boot_menu(ipl);
651 s390_ipl_prepare_qipl(cpu);
652}
653
654static void s390_ipl_reset(DeviceState *dev)
655{
656 S390IPLState *ipl = S390_IPL(dev);
657
658 if (ipl->reset_type != S390_RESET_REIPL) {
659 ipl->iplb_valid = false;
660 memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
661 }
662}
663
664static void s390_ipl_class_init(ObjectClass *klass, void *data)
665{
666 DeviceClass *dc = DEVICE_CLASS(klass);
667
668 dc->realize = s390_ipl_realize;
669 dc->props = s390_ipl_properties;
670 dc->reset = s390_ipl_reset;
671 dc->vmsd = &vmstate_ipl;
672 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
673
674 dc->user_creatable = false;
675}
676
677static const TypeInfo s390_ipl_info = {
678 .class_init = s390_ipl_class_init,
679 .parent = TYPE_DEVICE,
680 .name = TYPE_S390_IPL,
681 .instance_size = sizeof(S390IPLState),
682};
683
684static void s390_ipl_register_types(void)
685{
686 type_register_static(&s390_ipl_info);
687}
688
689type_init(s390_ipl_register_types)
690
