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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
30#define KERN_IMAGE_START 0x010000UL
31#define KERN_PARM_AREA 0x010480UL
32#define INITRD_START 0x800000UL
33#define INITRD_PARM_START 0x010408UL
34#define INITRD_PARM_SIZE 0x010410UL
35#define PARMFILE_START 0x001000UL
36#define ZIPL_IMAGE_START 0x009000UL
37#define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64)
38
39static bool iplb_extended_needed(void *opaque)
40{
41 S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
42
43 return ipl->iplbext_migration;
44}
45
46static const VMStateDescription vmstate_iplb_extended = {
47 .name = "ipl/iplb_extended",
48 .version_id = 0,
49 .minimum_version_id = 0,
50 .needed = iplb_extended_needed,
51 .fields = (VMStateField[]) {
52 VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
53 VMSTATE_END_OF_LIST()
54 }
55};
56
57static const VMStateDescription vmstate_iplb = {
58 .name = "ipl/iplb",
59 .version_id = 0,
60 .minimum_version_id = 0,
61 .fields = (VMStateField[]) {
62 VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
63 VMSTATE_UINT16(devno, IplParameterBlock),
64 VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
65 VMSTATE_END_OF_LIST()
66 },
67 .subsections = (const VMStateDescription*[]) {
68 &vmstate_iplb_extended,
69 NULL
70 }
71};
72
73static const VMStateDescription vmstate_ipl = {
74 .name = "ipl",
75 .version_id = 0,
76 .minimum_version_id = 0,
77 .fields = (VMStateField[]) {
78 VMSTATE_UINT64(compat_start_addr, S390IPLState),
79 VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
80 VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
81 VMSTATE_BOOL(iplb_valid, S390IPLState),
82 VMSTATE_UINT8(cssid, S390IPLState),
83 VMSTATE_UINT8(ssid, S390IPLState),
84 VMSTATE_UINT16(devno, S390IPLState),
85 VMSTATE_END_OF_LIST()
86 }
87};
88
89static S390IPLState *get_ipl_device(void)
90{
91 return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
92}
93
94static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
95{
96 uint64_t dstaddr = *(uint64_t *) opaque;
97
98
99
100
101 return srcaddr + dstaddr;
102}
103
104static void s390_ipl_realize(DeviceState *dev, Error **errp)
105{
106 S390IPLState *ipl = S390_IPL(dev);
107 uint64_t pentry = KERN_IMAGE_START;
108 int kernel_size;
109 Error *err = NULL;
110
111 int bios_size;
112 char *bios_filename;
113
114
115
116
117
118 if (!ipl->kernel || ipl->enforce_bios) {
119 uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
120
121 if (bios_name == NULL) {
122 bios_name = ipl->firmware;
123 }
124
125 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
126 if (bios_filename == NULL) {
127 error_setg(&err, "could not find stage1 bootloader");
128 goto error;
129 }
130
131 bios_size = load_elf(bios_filename, bios_translate_addr, &fwbase,
132 &ipl->bios_start_addr, NULL, NULL, 1,
133 EM_S390, 0, 0);
134 if (bios_size > 0) {
135
136 ipl->bios_start_addr += fwbase;
137 } else {
138
139 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
140 4096);
141 ipl->bios_start_addr = ZIPL_IMAGE_START;
142 }
143 g_free(bios_filename);
144
145 if (bios_size == -1) {
146 error_setg(&err, "could not load bootloader '%s'", bios_name);
147 goto error;
148 }
149
150
151 ipl->start_addr = ipl->bios_start_addr;
152 }
153
154 if (ipl->kernel) {
155 kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL,
156 NULL, 1, EM_S390, 0, 0);
157 if (kernel_size < 0) {
158 kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
159 }
160 if (kernel_size < 0) {
161 error_setg(&err, "could not load kernel '%s'", ipl->kernel);
162 goto error;
163 }
164
165
166
167
168
169
170 if (pentry == KERN_IMAGE_START || pentry == 0x800) {
171 ipl->start_addr = KERN_IMAGE_START;
172
173 strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline);
174 } else {
175 ipl->start_addr = pentry;
176 }
177
178 if (ipl->initrd) {
179 ram_addr_t initrd_offset;
180 int initrd_size;
181
182 initrd_offset = INITRD_START;
183 while (kernel_size + 0x100000 > initrd_offset) {
184 initrd_offset += 0x100000;
185 }
186 initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
187 ram_size - initrd_offset);
188 if (initrd_size == -1) {
189 error_setg(&err, "could not load initrd '%s'", ipl->initrd);
190 goto error;
191 }
192
193
194
195
196
197 stq_p(rom_ptr(INITRD_PARM_START), initrd_offset);
198 stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size);
199 }
200 }
201
202
203
204
205
206 ipl->compat_start_addr = ipl->start_addr;
207 ipl->compat_bios_start_addr = ipl->bios_start_addr;
208 qemu_register_reset(qdev_reset_all_fn, dev);
209error:
210 error_propagate(errp, err);
211}
212
213static Property s390_ipl_properties[] = {
214 DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
215 DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
216 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
217 DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
218 DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
219 DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
220 DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
221 true),
222 DEFINE_PROP_END_OF_LIST(),
223};
224
225static void s390_ipl_set_boot_menu(S390IPLState *ipl)
226{
227 QemuOptsList *plist = qemu_find_opts("boot-opts");
228 QemuOpts *opts = QTAILQ_FIRST(&plist->head);
229 uint8_t *flags = &ipl->qipl.qipl_flags;
230 uint32_t *timeout = &ipl->qipl.boot_menu_timeout;
231 const char *tmp;
232 unsigned long splash_time = 0;
233
234 if (!get_boot_device(0)) {
235 if (boot_menu) {
236 error_report("boot menu requires a bootindex to be specified for "
237 "the IPL device");
238 }
239 return;
240 }
241
242 switch (ipl->iplb.pbt) {
243 case S390_IPL_TYPE_CCW:
244
245 if (!qemu_opt_get(opts, "menu")) {
246 *flags |= QIPL_FLAG_BM_OPTS_ZIPL;
247 return;
248 }
249 break;
250 case S390_IPL_TYPE_QEMU_SCSI:
251 break;
252 default:
253 if (boot_menu) {
254 error_report("boot menu is not supported for this device type");
255 }
256 return;
257 }
258
259 if (!boot_menu) {
260 return;
261 }
262
263 *flags |= QIPL_FLAG_BM_OPTS_CMD;
264
265 tmp = qemu_opt_get(opts, "splash-time");
266
267 if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
268 error_report("splash-time is invalid, forcing it to 0");
269 *timeout = 0;
270 return;
271 }
272
273 if (splash_time > 0xffffffff) {
274 error_report("splash-time is too large, forcing it to max value");
275 *timeout = 0xffffffff;
276 return;
277 }
278
279 *timeout = cpu_to_be32(splash_time);
280}
281
282static CcwDevice *s390_get_ccw_device(DeviceState *dev_st)
283{
284 CcwDevice *ccw_dev = NULL;
285
286 if (dev_st) {
287 VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
288 object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
289 TYPE_VIRTIO_CCW_DEVICE);
290 if (virtio_ccw_dev) {
291 ccw_dev = CCW_DEVICE(virtio_ccw_dev);
292 } else {
293 SCSIDevice *sd = (SCSIDevice *)
294 object_dynamic_cast(OBJECT(dev_st),
295 TYPE_SCSI_DEVICE);
296 if (sd) {
297 SCSIBus *bus = scsi_bus_from_device(sd);
298 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
299 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
300 vdev);
301
302 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
303 TYPE_CCW_DEVICE);
304 }
305 }
306 }
307 return ccw_dev;
308}
309
310static bool s390_gen_initial_iplb(S390IPLState *ipl)
311{
312 DeviceState *dev_st;
313 CcwDevice *ccw_dev = NULL;
314
315 dev_st = get_boot_device(0);
316 if (dev_st) {
317 ccw_dev = s390_get_ccw_device(dev_st);
318 }
319
320
321
322
323 if (ccw_dev) {
324 SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
325 TYPE_SCSI_DEVICE);
326
327 if (sd) {
328 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
329 ipl->iplb.blk0_len =
330 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
331 ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
332 ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
333 ipl->iplb.scsi.target = cpu_to_be16(sd->id);
334 ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
335 ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
336 ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
337 } else {
338 VirtIONet *vn = (VirtIONet *) object_dynamic_cast(OBJECT(dev_st),
339 TYPE_VIRTIO_NET);
340
341 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
342 ipl->iplb.blk0_len =
343 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
344 ipl->iplb.pbt = S390_IPL_TYPE_CCW;
345 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
346 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
347
348 if (vn) {
349 ipl->netboot = true;
350 }
351 }
352
353 if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
354 ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
355 }
356
357 return true;
358 }
359
360 return false;
361}
362
363int s390_ipl_set_loadparm(uint8_t *loadparm)
364{
365 MachineState *machine = MACHINE(qdev_get_machine());
366 char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
367
368 if (lp) {
369 int i;
370
371
372 for (i = 0; i < 8 && lp[i]; i++) {
373 loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
374 }
375
376 g_free(lp);
377 return 0;
378 }
379
380 return -1;
381}
382
383static int load_netboot_image(Error **errp)
384{
385 S390IPLState *ipl = get_ipl_device();
386 char *netboot_filename;
387 MemoryRegion *sysmem = get_system_memory();
388 MemoryRegion *mr = NULL;
389 void *ram_ptr = NULL;
390 int img_size = -1;
391
392 mr = memory_region_find(sysmem, 0, 1).mr;
393 if (!mr) {
394 error_setg(errp, "Failed to find memory region at address 0");
395 return -1;
396 }
397
398 ram_ptr = memory_region_get_ram_ptr(mr);
399 if (!ram_ptr) {
400 error_setg(errp, "No RAM found");
401 goto unref_mr;
402 }
403
404 netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
405 if (netboot_filename == NULL) {
406 error_setg(errp, "Could not find network bootloader '%s'",
407 ipl->netboot_fw);
408 goto unref_mr;
409 }
410
411 img_size = load_elf_ram(netboot_filename, NULL, NULL, &ipl->start_addr,
412 NULL, NULL, 1, EM_S390, 0, 0, NULL, false);
413
414 if (img_size < 0) {
415 img_size = load_image_size(netboot_filename, ram_ptr, ram_size);
416 ipl->start_addr = KERN_IMAGE_START;
417 }
418
419 if (img_size < 0) {
420 error_setg(errp, "Failed to load network bootloader");
421 }
422
423 g_free(netboot_filename);
424
425unref_mr:
426 memory_region_unref(mr);
427 return img_size;
428}
429
430static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
431 int virtio_id)
432{
433 uint8_t cssid;
434 uint8_t ssid;
435 uint16_t devno;
436 uint16_t schid;
437 SubchDev *sch = NULL;
438
439 if (iplb->pbt != S390_IPL_TYPE_CCW) {
440 return false;
441 }
442
443 devno = be16_to_cpu(iplb->ccw.devno);
444 ssid = iplb->ccw.ssid & 3;
445
446 for (schid = 0; schid < MAX_SCHID; schid++) {
447 for (cssid = 0; cssid < MAX_CSSID; cssid++) {
448 sch = css_find_subch(1, cssid, ssid, schid);
449
450 if (sch && sch->devno == devno) {
451 return sch->id.cu_model == virtio_id;
452 }
453 }
454 }
455 return false;
456}
457
458static bool is_virtio_net_device(IplParameterBlock *iplb)
459{
460 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
461}
462
463static bool is_virtio_scsi_device(IplParameterBlock *iplb)
464{
465 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
466}
467
468void s390_ipl_update_diag308(IplParameterBlock *iplb)
469{
470 S390IPLState *ipl = get_ipl_device();
471
472 ipl->iplb = *iplb;
473 ipl->iplb_valid = true;
474 ipl->netboot = is_virtio_net_device(iplb);
475}
476
477IplParameterBlock *s390_ipl_get_iplb(void)
478{
479 S390IPLState *ipl = get_ipl_device();
480
481 if (!ipl->iplb_valid) {
482 return NULL;
483 }
484 return &ipl->iplb;
485}
486
487void s390_reipl_request(void)
488{
489 S390IPLState *ipl = get_ipl_device();
490
491 ipl->reipl_requested = true;
492 if (ipl->iplb_valid &&
493 !ipl->netboot &&
494 ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
495 is_virtio_scsi_device(&ipl->iplb)) {
496 CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0));
497
498 if (ccw_dev &&
499 cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
500 (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
501
502
503
504
505 ipl->iplb_valid = s390_gen_initial_iplb(ipl);
506 }
507 }
508 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
509}
510
511static void s390_ipl_prepare_qipl(S390CPU *cpu)
512{
513 S390IPLState *ipl = get_ipl_device();
514 uint8_t *addr;
515 uint64_t len = 4096;
516
517 addr = cpu_physical_memory_map(cpu->env.psa, &len, 1);
518 if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
519 error_report("Cannot set QEMU IPL parameters");
520 return;
521 }
522 memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
523 cpu_physical_memory_unmap(addr, len, 1, len);
524}
525
526void s390_ipl_prepare_cpu(S390CPU *cpu)
527{
528 S390IPLState *ipl = get_ipl_device();
529 Error *err = NULL;
530
531 cpu->env.psw.addr = ipl->start_addr;
532 cpu->env.psw.mask = IPL_PSW_MASK;
533
534 if (!ipl->kernel || ipl->iplb_valid) {
535 cpu->env.psw.addr = ipl->bios_start_addr;
536 if (!ipl->iplb_valid) {
537 ipl->iplb_valid = s390_gen_initial_iplb(ipl);
538 }
539 }
540 if (ipl->netboot) {
541 if (load_netboot_image(&err) < 0) {
542 error_report_err(err);
543 exit(1);
544 }
545 ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
546 }
547 s390_ipl_set_boot_menu(ipl);
548 s390_ipl_prepare_qipl(cpu);
549}
550
551static void s390_ipl_reset(DeviceState *dev)
552{
553 S390IPLState *ipl = S390_IPL(dev);
554
555 if (!ipl->reipl_requested) {
556 ipl->iplb_valid = false;
557 memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
558 }
559 ipl->reipl_requested = false;
560}
561
562static void s390_ipl_class_init(ObjectClass *klass, void *data)
563{
564 DeviceClass *dc = DEVICE_CLASS(klass);
565
566 dc->realize = s390_ipl_realize;
567 dc->props = s390_ipl_properties;
568 dc->reset = s390_ipl_reset;
569 dc->vmsd = &vmstate_ipl;
570 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
571
572 dc->user_creatable = false;
573}
574
575static const TypeInfo s390_ipl_info = {
576 .class_init = s390_ipl_class_init,
577 .parent = TYPE_DEVICE,
578 .name = TYPE_S390_IPL,
579 .instance_size = sizeof(S390IPLState),
580};
581
582static void s390_ipl_register_types(void)
583{
584 type_register_static(&s390_ipl_info);
585}
586
587type_init(s390_ipl_register_types)
588
