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