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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * ipl/reipl/dump support for Linux on s390.
4 *
5 * Copyright IBM Corp. 2005, 2012
6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 * Heiko Carstens <heiko.carstens@de.ibm.com>
8 * Volker Sameske <sameske@de.ibm.com>
9 */
10
11#include <linux/types.h>
12#include <linux/export.h>
13#include <linux/init.h>
14#include <linux/device.h>
15#include <linux/delay.h>
16#include <linux/reboot.h>
17#include <linux/ctype.h>
18#include <linux/fs.h>
19#include <linux/gfp.h>
20#include <linux/crash_dump.h>
21#include <linux/debug_locks.h>
22#include <asm/diag.h>
23#include <asm/ipl.h>
24#include <asm/smp.h>
25#include <asm/setup.h>
26#include <asm/cpcmd.h>
27#include <asm/ebcdic.h>
28#include <asm/sclp.h>
29#include <asm/checksum.h>
30#include <asm/debug.h>
31#include <asm/os_info.h>
32#include "entry.h"
33
34#define IPL_PARM_BLOCK_VERSION 0
35
36#define IPL_UNKNOWN_STR "unknown"
37#define IPL_CCW_STR "ccw"
38#define IPL_FCP_STR "fcp"
39#define IPL_FCP_DUMP_STR "fcp_dump"
40#define IPL_NSS_STR "nss"
41
42#define DUMP_CCW_STR "ccw"
43#define DUMP_FCP_STR "fcp"
44#define DUMP_NONE_STR "none"
45
46/*
47 * Four shutdown trigger types are supported:
48 * - panic
49 * - halt
50 * - power off
51 * - reipl
52 * - restart
53 */
54#define ON_PANIC_STR "on_panic"
55#define ON_HALT_STR "on_halt"
56#define ON_POFF_STR "on_poff"
57#define ON_REIPL_STR "on_reboot"
58#define ON_RESTART_STR "on_restart"
59
60struct shutdown_action;
61struct shutdown_trigger {
62 char *name;
63 struct shutdown_action *action;
64};
65
66/*
67 * The following shutdown action types are supported:
68 */
69#define SHUTDOWN_ACTION_IPL_STR "ipl"
70#define SHUTDOWN_ACTION_REIPL_STR "reipl"
71#define SHUTDOWN_ACTION_DUMP_STR "dump"
72#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
73#define SHUTDOWN_ACTION_STOP_STR "stop"
74#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
75
76struct shutdown_action {
77 char *name;
78 void (*fn) (struct shutdown_trigger *trigger);
79 int (*init) (void);
80 int init_rc;
81};
82
83static char *ipl_type_str(enum ipl_type type)
84{
85 switch (type) {
86 case IPL_TYPE_CCW:
87 return IPL_CCW_STR;
88 case IPL_TYPE_FCP:
89 return IPL_FCP_STR;
90 case IPL_TYPE_FCP_DUMP:
91 return IPL_FCP_DUMP_STR;
92 case IPL_TYPE_NSS:
93 return IPL_NSS_STR;
94 case IPL_TYPE_UNKNOWN:
95 default:
96 return IPL_UNKNOWN_STR;
97 }
98}
99
100enum dump_type {
101 DUMP_TYPE_NONE = 1,
102 DUMP_TYPE_CCW = 2,
103 DUMP_TYPE_FCP = 4,
104};
105
106static char *dump_type_str(enum dump_type type)
107{
108 switch (type) {
109 case DUMP_TYPE_NONE:
110 return DUMP_NONE_STR;
111 case DUMP_TYPE_CCW:
112 return DUMP_CCW_STR;
113 case DUMP_TYPE_FCP:
114 return DUMP_FCP_STR;
115 default:
116 return NULL;
117 }
118}
119
120static int ipl_block_valid;
121static struct ipl_parameter_block ipl_block;
122
123static int reipl_capabilities = IPL_TYPE_UNKNOWN;
124
125static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
126static struct ipl_parameter_block *reipl_block_fcp;
127static struct ipl_parameter_block *reipl_block_ccw;
128static struct ipl_parameter_block *reipl_block_nss;
129static struct ipl_parameter_block *reipl_block_actual;
130
131static int dump_capabilities = DUMP_TYPE_NONE;
132static enum dump_type dump_type = DUMP_TYPE_NONE;
133static struct ipl_parameter_block *dump_block_fcp;
134static struct ipl_parameter_block *dump_block_ccw;
135
136static struct sclp_ipl_info sclp_ipl_info;
137
138static inline int __diag308(unsigned long subcode, void *addr)
139{
140 register unsigned long _addr asm("0") = (unsigned long) addr;
141 register unsigned long _rc asm("1") = 0;
142
143 asm volatile(
144 " diag %0,%2,0x308\n"
145 "0: nopr %%r7\n"
146 EX_TABLE(0b,0b)
147 : "+d" (_addr), "+d" (_rc)
148 : "d" (subcode) : "cc", "memory");
149 return _rc;
150}
151
152int diag308(unsigned long subcode, void *addr)
153{
154 diag_stat_inc(DIAG_STAT_X308);
155 return __diag308(subcode, addr);
156}
157EXPORT_SYMBOL_GPL(diag308);
158
159/* SYSFS */
160
161#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
162static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
163 struct kobj_attribute *attr, \
164 char *page) \
165{ \
166 return snprintf(page, PAGE_SIZE, _format, ##args); \
167}
168
169#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
170static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
171 struct kobj_attribute *attr, \
172 const char *buf, size_t len) \
173{ \
174 unsigned long long ssid, devno; \
175 \
176 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
177 return -EINVAL; \
178 \
179 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
180 return -EINVAL; \
181 \
182 _ipl_blk.ssid = ssid; \
183 _ipl_blk.devno = devno; \
184 return len; \
185}
186
187#define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
188IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
189 _ipl_blk.ssid, _ipl_blk.devno); \
190IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
191static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
192 __ATTR(_name, (S_IRUGO | S_IWUSR), \
193 sys_##_prefix##_##_name##_show, \
194 sys_##_prefix##_##_name##_store) \
195
196#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
197IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
198static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
199 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
200
201#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
202IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
203static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
204 struct kobj_attribute *attr, \
205 const char *buf, size_t len) \
206{ \
207 unsigned long long value; \
208 if (sscanf(buf, _fmt_in, &value) != 1) \
209 return -EINVAL; \
210 _value = value; \
211 return len; \
212} \
213static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
214 __ATTR(_name,(S_IRUGO | S_IWUSR), \
215 sys_##_prefix##_##_name##_show, \
216 sys_##_prefix##_##_name##_store)
217
218#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
219IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
220static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
221 struct kobj_attribute *attr, \
222 const char *buf, size_t len) \
223{ \
224 strncpy(_value, buf, sizeof(_value) - 1); \
225 strim(_value); \
226 return len; \
227} \
228static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
229 __ATTR(_name,(S_IRUGO | S_IWUSR), \
230 sys_##_prefix##_##_name##_show, \
231 sys_##_prefix##_##_name##_store)
232
233/*
234 * ipl section
235 */
236
237static __init enum ipl_type get_ipl_type(void)
238{
239 if (!ipl_block_valid)
240 return IPL_TYPE_UNKNOWN;
241
242 switch (ipl_block.hdr.pbt) {
243 case DIAG308_IPL_TYPE_CCW:
244 return IPL_TYPE_CCW;
245 case DIAG308_IPL_TYPE_FCP:
246 if (ipl_block.ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
247 return IPL_TYPE_FCP_DUMP;
248 else
249 return IPL_TYPE_FCP;
250 }
251 return IPL_TYPE_UNKNOWN;
252}
253
254struct ipl_info ipl_info;
255EXPORT_SYMBOL_GPL(ipl_info);
256
257static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
258 char *page)
259{
260 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
261}
262
263static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
264
265/* VM IPL PARM routines */
266static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
267 const struct ipl_parameter_block *ipb)
268{
269 int i;
270 size_t len;
271 char has_lowercase = 0;
272
273 len = 0;
274 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
275 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
276
277 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
278 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
279 /* If at least one character is lowercase, we assume mixed
280 * case; otherwise we convert everything to lowercase.
281 */
282 for (i = 0; i < len; i++)
283 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
284 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
285 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
286 has_lowercase = 1;
287 break;
288 }
289 if (!has_lowercase)
290 EBC_TOLOWER(dest, len);
291 EBCASC(dest, len);
292 }
293 dest[len] = 0;
294
295 return len;
296}
297
298size_t append_ipl_vmparm(char *dest, size_t size)
299{
300 size_t rc;
301
302 rc = 0;
303 if (ipl_block_valid && ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW)
304 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
305 else
306 dest[0] = 0;
307 return rc;
308}
309
310static ssize_t ipl_vm_parm_show(struct kobject *kobj,
311 struct kobj_attribute *attr, char *page)
312{
313 char parm[DIAG308_VMPARM_SIZE + 1] = {};
314
315 append_ipl_vmparm(parm, sizeof(parm));
316 return sprintf(page, "%s\n", parm);
317}
318
319static size_t scpdata_length(const char* buf, size_t count)
320{
321 while (count) {
322 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
323 break;
324 count--;
325 }
326 return count;
327}
328
329static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
330 const struct ipl_parameter_block *ipb)
331{
332 size_t count;
333 size_t i;
334 int has_lowercase;
335
336 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
337 ipb->ipl_info.fcp.scp_data_len));
338 if (!count)
339 goto out;
340
341 has_lowercase = 0;
342 for (i = 0; i < count; i++) {
343 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
344 count = 0;
345 goto out;
346 }
347 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
348 has_lowercase = 1;
349 }
350
351 if (has_lowercase)
352 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
353 else
354 for (i = 0; i < count; i++)
355 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
356out:
357 dest[count] = '\0';
358 return count;
359}
360
361size_t append_ipl_scpdata(char *dest, size_t len)
362{
363 size_t rc;
364
365 rc = 0;
366 if (ipl_block_valid && ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
367 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
368 else
369 dest[0] = 0;
370 return rc;
371}
372
373
374static struct kobj_attribute sys_ipl_vm_parm_attr =
375 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
376
377static ssize_t sys_ipl_device_show(struct kobject *kobj,
378 struct kobj_attribute *attr, char *page)
379{
380 switch (ipl_info.type) {
381 case IPL_TYPE_CCW:
382 return sprintf(page, "0.%x.%04x\n", ipl_block.ipl_info.ccw.ssid,
383 ipl_block.ipl_info.ccw.devno);
384 case IPL_TYPE_FCP:
385 case IPL_TYPE_FCP_DUMP:
386 return sprintf(page, "0.0.%04x\n",
387 ipl_block.ipl_info.fcp.devno);
388 default:
389 return 0;
390 }
391}
392
393static struct kobj_attribute sys_ipl_device_attr =
394 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
395
396static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
397 struct bin_attribute *attr, char *buf,
398 loff_t off, size_t count)
399{
400 return memory_read_from_buffer(buf, count, &off, &ipl_block,
401 ipl_block.hdr.len);
402}
403static struct bin_attribute ipl_parameter_attr =
404 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
405 PAGE_SIZE);
406
407static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
408 struct bin_attribute *attr, char *buf,
409 loff_t off, size_t count)
410{
411 unsigned int size = ipl_block.ipl_info.fcp.scp_data_len;
412 void *scp_data = &ipl_block.ipl_info.fcp.scp_data;
413
414 return memory_read_from_buffer(buf, count, &off, scp_data, size);
415}
416static struct bin_attribute ipl_scp_data_attr =
417 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
418
419static struct bin_attribute *ipl_fcp_bin_attrs[] = {
420 &ipl_parameter_attr,
421 &ipl_scp_data_attr,
422 NULL,
423};
424
425/* FCP ipl device attributes */
426
427DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
428 (unsigned long long)ipl_block.ipl_info.fcp.wwpn);
429DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
430 (unsigned long long)ipl_block.ipl_info.fcp.lun);
431DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
432 (unsigned long long)ipl_block.ipl_info.fcp.bootprog);
433DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
434 (unsigned long long)ipl_block.ipl_info.fcp.br_lba);
435
436static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
437 struct kobj_attribute *attr, char *page)
438{
439 char loadparm[LOADPARM_LEN + 1] = {};
440
441 if (!sclp_ipl_info.is_valid)
442 return sprintf(page, "#unknown#\n");
443 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
444 EBCASC(loadparm, LOADPARM_LEN);
445 strim(loadparm);
446 return sprintf(page, "%s\n", loadparm);
447}
448
449static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
450 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
451
452static struct attribute *ipl_fcp_attrs[] = {
453 &sys_ipl_type_attr.attr,
454 &sys_ipl_device_attr.attr,
455 &sys_ipl_fcp_wwpn_attr.attr,
456 &sys_ipl_fcp_lun_attr.attr,
457 &sys_ipl_fcp_bootprog_attr.attr,
458 &sys_ipl_fcp_br_lba_attr.attr,
459 &sys_ipl_ccw_loadparm_attr.attr,
460 NULL,
461};
462
463static struct attribute_group ipl_fcp_attr_group = {
464 .attrs = ipl_fcp_attrs,
465 .bin_attrs = ipl_fcp_bin_attrs,
466};
467
468/* CCW ipl device attributes */
469
470static struct attribute *ipl_ccw_attrs_vm[] = {
471 &sys_ipl_type_attr.attr,
472 &sys_ipl_device_attr.attr,
473 &sys_ipl_ccw_loadparm_attr.attr,
474 &sys_ipl_vm_parm_attr.attr,
475 NULL,
476};
477
478static struct attribute *ipl_ccw_attrs_lpar[] = {
479 &sys_ipl_type_attr.attr,
480 &sys_ipl_device_attr.attr,
481 &sys_ipl_ccw_loadparm_attr.attr,
482 NULL,
483};
484
485static struct attribute_group ipl_ccw_attr_group_vm = {
486 .attrs = ipl_ccw_attrs_vm,
487};
488
489static struct attribute_group ipl_ccw_attr_group_lpar = {
490 .attrs = ipl_ccw_attrs_lpar
491};
492
493/* UNKNOWN ipl device attributes */
494
495static struct attribute *ipl_unknown_attrs[] = {
496 &sys_ipl_type_attr.attr,
497 NULL,
498};
499
500static struct attribute_group ipl_unknown_attr_group = {
501 .attrs = ipl_unknown_attrs,
502};
503
504static struct kset *ipl_kset;
505
506static void __ipl_run(void *unused)
507{
508 __bpon();
509 diag308(DIAG308_LOAD_CLEAR, NULL);
510}
511
512static void ipl_run(struct shutdown_trigger *trigger)
513{
514 smp_call_ipl_cpu(__ipl_run, NULL);
515}
516
517static int __init ipl_init(void)
518{
519 int rc;
520
521 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
522 if (!ipl_kset) {
523 rc = -ENOMEM;
524 goto out;
525 }
526 switch (ipl_info.type) {
527 case IPL_TYPE_CCW:
528 if (MACHINE_IS_VM)
529 rc = sysfs_create_group(&ipl_kset->kobj,
530 &ipl_ccw_attr_group_vm);
531 else
532 rc = sysfs_create_group(&ipl_kset->kobj,
533 &ipl_ccw_attr_group_lpar);
534 break;
535 case IPL_TYPE_FCP:
536 case IPL_TYPE_FCP_DUMP:
537 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
538 break;
539 default:
540 rc = sysfs_create_group(&ipl_kset->kobj,
541 &ipl_unknown_attr_group);
542 break;
543 }
544out:
545 if (rc)
546 panic("ipl_init failed: rc = %i\n", rc);
547
548 return 0;
549}
550
551static struct shutdown_action __refdata ipl_action = {
552 .name = SHUTDOWN_ACTION_IPL_STR,
553 .fn = ipl_run,
554 .init = ipl_init,
555};
556
557/*
558 * reipl shutdown action: Reboot Linux on shutdown.
559 */
560
561/* VM IPL PARM attributes */
562static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
563 char *page)
564{
565 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
566
567 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
568 return sprintf(page, "%s\n", vmparm);
569}
570
571static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
572 size_t vmparm_max,
573 const char *buf, size_t len)
574{
575 int i, ip_len;
576
577 /* ignore trailing newline */
578 ip_len = len;
579 if ((len > 0) && (buf[len - 1] == '\n'))
580 ip_len--;
581
582 if (ip_len > vmparm_max)
583 return -EINVAL;
584
585 /* parm is used to store kernel options, check for common chars */
586 for (i = 0; i < ip_len; i++)
587 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
588 return -EINVAL;
589
590 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
591 ipb->ipl_info.ccw.vm_parm_len = ip_len;
592 if (ip_len > 0) {
593 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
594 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
595 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
596 } else {
597 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
598 }
599
600 return len;
601}
602
603/* NSS wrapper */
604static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
605 struct kobj_attribute *attr, char *page)
606{
607 return reipl_generic_vmparm_show(reipl_block_nss, page);
608}
609
610static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
611 struct kobj_attribute *attr,
612 const char *buf, size_t len)
613{
614 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
615}
616
617/* CCW wrapper */
618static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
619 struct kobj_attribute *attr, char *page)
620{
621 return reipl_generic_vmparm_show(reipl_block_ccw, page);
622}
623
624static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
625 struct kobj_attribute *attr,
626 const char *buf, size_t len)
627{
628 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
629}
630
631static struct kobj_attribute sys_reipl_nss_vmparm_attr =
632 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
633 reipl_nss_vmparm_store);
634static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
635 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
636 reipl_ccw_vmparm_store);
637
638/* FCP reipl device attributes */
639
640static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
641 struct bin_attribute *attr,
642 char *buf, loff_t off, size_t count)
643{
644 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
645 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
646
647 return memory_read_from_buffer(buf, count, &off, scp_data, size);
648}
649
650static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
651 struct bin_attribute *attr,
652 char *buf, loff_t off, size_t count)
653{
654 size_t scpdata_len = count;
655 size_t padding;
656
657
658 if (off)
659 return -EINVAL;
660
661 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
662 if (scpdata_len % 8) {
663 padding = 8 - (scpdata_len % 8);
664 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
665 0, padding);
666 scpdata_len += padding;
667 }
668
669 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
670 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
671 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
672
673 return count;
674}
675static struct bin_attribute sys_reipl_fcp_scp_data_attr =
676 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
677 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
678
679static struct bin_attribute *reipl_fcp_bin_attrs[] = {
680 &sys_reipl_fcp_scp_data_attr,
681 NULL,
682};
683
684DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
685 reipl_block_fcp->ipl_info.fcp.wwpn);
686DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
687 reipl_block_fcp->ipl_info.fcp.lun);
688DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
689 reipl_block_fcp->ipl_info.fcp.bootprog);
690DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
691 reipl_block_fcp->ipl_info.fcp.br_lba);
692DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
693 reipl_block_fcp->ipl_info.fcp.devno);
694
695static void reipl_get_ascii_loadparm(char *loadparm,
696 struct ipl_parameter_block *ibp)
697{
698 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
699 EBCASC(loadparm, LOADPARM_LEN);
700 loadparm[LOADPARM_LEN] = 0;
701 strim(loadparm);
702}
703
704static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
705 char *page)
706{
707 char buf[LOADPARM_LEN + 1];
708
709 reipl_get_ascii_loadparm(buf, ipb);
710 return sprintf(page, "%s\n", buf);
711}
712
713static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
714 const char *buf, size_t len)
715{
716 int i, lp_len;
717
718 /* ignore trailing newline */
719 lp_len = len;
720 if ((len > 0) && (buf[len - 1] == '\n'))
721 lp_len--;
722 /* loadparm can have max 8 characters and must not start with a blank */
723 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
724 return -EINVAL;
725 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
726 for (i = 0; i < lp_len; i++) {
727 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
728 (buf[i] == '.'))
729 continue;
730 return -EINVAL;
731 }
732 /* initialize loadparm with blanks */
733 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
734 /* copy and convert to ebcdic */
735 memcpy(ipb->hdr.loadparm, buf, lp_len);
736 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
737 ipb->hdr.flags |= DIAG308_FLAGS_LP_VALID;
738 return len;
739}
740
741/* FCP wrapper */
742static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
743 struct kobj_attribute *attr, char *page)
744{
745 return reipl_generic_loadparm_show(reipl_block_fcp, page);
746}
747
748static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
749 struct kobj_attribute *attr,
750 const char *buf, size_t len)
751{
752 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
753}
754
755static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
756 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
757 reipl_fcp_loadparm_store);
758
759static struct attribute *reipl_fcp_attrs[] = {
760 &sys_reipl_fcp_device_attr.attr,
761 &sys_reipl_fcp_wwpn_attr.attr,
762 &sys_reipl_fcp_lun_attr.attr,
763 &sys_reipl_fcp_bootprog_attr.attr,
764 &sys_reipl_fcp_br_lba_attr.attr,
765 &sys_reipl_fcp_loadparm_attr.attr,
766 NULL,
767};
768
769static struct attribute_group reipl_fcp_attr_group = {
770 .attrs = reipl_fcp_attrs,
771 .bin_attrs = reipl_fcp_bin_attrs,
772};
773
774/* CCW reipl device attributes */
775DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
776
777/* NSS wrapper */
778static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
779 struct kobj_attribute *attr, char *page)
780{
781 return reipl_generic_loadparm_show(reipl_block_nss, page);
782}
783
784static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
785 struct kobj_attribute *attr,
786 const char *buf, size_t len)
787{
788 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
789}
790
791/* CCW wrapper */
792static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
793 struct kobj_attribute *attr, char *page)
794{
795 return reipl_generic_loadparm_show(reipl_block_ccw, page);
796}
797
798static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
799 struct kobj_attribute *attr,
800 const char *buf, size_t len)
801{
802 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
803}
804
805static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
806 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
807 reipl_ccw_loadparm_store);
808
809static struct attribute *reipl_ccw_attrs_vm[] = {
810 &sys_reipl_ccw_device_attr.attr,
811 &sys_reipl_ccw_loadparm_attr.attr,
812 &sys_reipl_ccw_vmparm_attr.attr,
813 NULL,
814};
815
816static struct attribute *reipl_ccw_attrs_lpar[] = {
817 &sys_reipl_ccw_device_attr.attr,
818 &sys_reipl_ccw_loadparm_attr.attr,
819 NULL,
820};
821
822static struct attribute_group reipl_ccw_attr_group_vm = {
823 .name = IPL_CCW_STR,
824 .attrs = reipl_ccw_attrs_vm,
825};
826
827static struct attribute_group reipl_ccw_attr_group_lpar = {
828 .name = IPL_CCW_STR,
829 .attrs = reipl_ccw_attrs_lpar,
830};
831
832
833/* NSS reipl device attributes */
834static void reipl_get_ascii_nss_name(char *dst,
835 struct ipl_parameter_block *ipb)
836{
837 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
838 EBCASC(dst, NSS_NAME_SIZE);
839 dst[NSS_NAME_SIZE] = 0;
840}
841
842static ssize_t reipl_nss_name_show(struct kobject *kobj,
843 struct kobj_attribute *attr, char *page)
844{
845 char nss_name[NSS_NAME_SIZE + 1] = {};
846
847 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
848 return sprintf(page, "%s\n", nss_name);
849}
850
851static ssize_t reipl_nss_name_store(struct kobject *kobj,
852 struct kobj_attribute *attr,
853 const char *buf, size_t len)
854{
855 int nss_len;
856
857 /* ignore trailing newline */
858 nss_len = len;
859 if ((len > 0) && (buf[len - 1] == '\n'))
860 nss_len--;
861
862 if (nss_len > NSS_NAME_SIZE)
863 return -EINVAL;
864
865 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
866 if (nss_len > 0) {
867 reipl_block_nss->ipl_info.ccw.vm_flags |=
868 DIAG308_VM_FLAGS_NSS_VALID;
869 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
870 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
871 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
872 } else {
873 reipl_block_nss->ipl_info.ccw.vm_flags &=
874 ~DIAG308_VM_FLAGS_NSS_VALID;
875 }
876
877 return len;
878}
879
880static struct kobj_attribute sys_reipl_nss_name_attr =
881 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
882 reipl_nss_name_store);
883
884static struct kobj_attribute sys_reipl_nss_loadparm_attr =
885 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
886 reipl_nss_loadparm_store);
887
888static struct attribute *reipl_nss_attrs[] = {
889 &sys_reipl_nss_name_attr.attr,
890 &sys_reipl_nss_loadparm_attr.attr,
891 &sys_reipl_nss_vmparm_attr.attr,
892 NULL,
893};
894
895static struct attribute_group reipl_nss_attr_group = {
896 .name = IPL_NSS_STR,
897 .attrs = reipl_nss_attrs,
898};
899
900void set_os_info_reipl_block(void)
901{
902 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
903 reipl_block_actual->hdr.len);
904}
905
906/* reipl type */
907
908static int reipl_set_type(enum ipl_type type)
909{
910 if (!(reipl_capabilities & type))
911 return -EINVAL;
912
913 switch(type) {
914 case IPL_TYPE_CCW:
915 reipl_block_actual = reipl_block_ccw;
916 break;
917 case IPL_TYPE_FCP:
918 reipl_block_actual = reipl_block_fcp;
919 break;
920 case IPL_TYPE_NSS:
921 reipl_block_actual = reipl_block_nss;
922 break;
923 default:
924 break;
925 }
926 reipl_type = type;
927 return 0;
928}
929
930static ssize_t reipl_type_show(struct kobject *kobj,
931 struct kobj_attribute *attr, char *page)
932{
933 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
934}
935
936static ssize_t reipl_type_store(struct kobject *kobj,
937 struct kobj_attribute *attr,
938 const char *buf, size_t len)
939{
940 int rc = -EINVAL;
941
942 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
943 rc = reipl_set_type(IPL_TYPE_CCW);
944 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
945 rc = reipl_set_type(IPL_TYPE_FCP);
946 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
947 rc = reipl_set_type(IPL_TYPE_NSS);
948 return (rc != 0) ? rc : len;
949}
950
951static struct kobj_attribute reipl_type_attr =
952 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
953
954static struct kset *reipl_kset;
955static struct kset *reipl_fcp_kset;
956
957static void __reipl_run(void *unused)
958{
959 switch (reipl_type) {
960 case IPL_TYPE_CCW:
961 diag308(DIAG308_SET, reipl_block_ccw);
962 diag308(DIAG308_LOAD_CLEAR, NULL);
963 break;
964 case IPL_TYPE_FCP:
965 diag308(DIAG308_SET, reipl_block_fcp);
966 diag308(DIAG308_LOAD_CLEAR, NULL);
967 break;
968 case IPL_TYPE_NSS:
969 diag308(DIAG308_SET, reipl_block_nss);
970 diag308(DIAG308_LOAD_CLEAR, NULL);
971 break;
972 case IPL_TYPE_UNKNOWN:
973 diag308(DIAG308_LOAD_CLEAR, NULL);
974 break;
975 case IPL_TYPE_FCP_DUMP:
976 break;
977 }
978 disabled_wait((unsigned long) __builtin_return_address(0));
979}
980
981static void reipl_run(struct shutdown_trigger *trigger)
982{
983 smp_call_ipl_cpu(__reipl_run, NULL);
984}
985
986static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
987{
988 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
989 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
990 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
991 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
992}
993
994static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
995{
996 /* LOADPARM */
997 /* check if read scp info worked and set loadparm */
998 if (sclp_ipl_info.is_valid)
999 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1000 else
1001 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1002 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1003 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1004
1005 /* VM PARM */
1006 if (MACHINE_IS_VM && ipl_block_valid &&
1007 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1008
1009 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1010 ipb->ipl_info.ccw.vm_parm_len =
1011 ipl_block.ipl_info.ccw.vm_parm_len;
1012 memcpy(ipb->ipl_info.ccw.vm_parm,
1013 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1014 }
1015}
1016
1017static int __init reipl_nss_init(void)
1018{
1019 int rc;
1020
1021 if (!MACHINE_IS_VM)
1022 return 0;
1023
1024 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1025 if (!reipl_block_nss)
1026 return -ENOMEM;
1027
1028 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1029 if (rc)
1030 return rc;
1031
1032 reipl_block_ccw_init(reipl_block_nss);
1033 reipl_capabilities |= IPL_TYPE_NSS;
1034 return 0;
1035}
1036
1037static int __init reipl_ccw_init(void)
1038{
1039 int rc;
1040
1041 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1042 if (!reipl_block_ccw)
1043 return -ENOMEM;
1044
1045 rc = sysfs_create_group(&reipl_kset->kobj,
1046 MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
1047 : &reipl_ccw_attr_group_lpar);
1048 if (rc)
1049 return rc;
1050
1051 reipl_block_ccw_init(reipl_block_ccw);
1052 if (ipl_info.type == IPL_TYPE_CCW) {
1053 reipl_block_ccw->ipl_info.ccw.ssid = ipl_block.ipl_info.ccw.ssid;
1054 reipl_block_ccw->ipl_info.ccw.devno = ipl_block.ipl_info.ccw.devno;
1055 reipl_block_ccw_fill_parms(reipl_block_ccw);
1056 }
1057
1058 reipl_capabilities |= IPL_TYPE_CCW;
1059 return 0;
1060}
1061
1062static int __init reipl_fcp_init(void)
1063{
1064 int rc;
1065
1066 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1067 if (!reipl_block_fcp)
1068 return -ENOMEM;
1069
1070 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1071 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1072 &reipl_kset->kobj);
1073 if (!reipl_fcp_kset) {
1074 free_page((unsigned long) reipl_block_fcp);
1075 return -ENOMEM;
1076 }
1077
1078 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1079 if (rc) {
1080 kset_unregister(reipl_fcp_kset);
1081 free_page((unsigned long) reipl_block_fcp);
1082 return rc;
1083 }
1084
1085 if (ipl_info.type == IPL_TYPE_FCP) {
1086 memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
1087 /*
1088 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1089 * is invalid in the SCSI IPL parameter block, so take it
1090 * always from sclp_ipl_info.
1091 */
1092 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1093 LOADPARM_LEN);
1094 } else {
1095 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1096 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1097 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1098 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1099 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1100 }
1101 reipl_capabilities |= IPL_TYPE_FCP;
1102 return 0;
1103}
1104
1105static int __init reipl_type_init(void)
1106{
1107 enum ipl_type reipl_type = ipl_info.type;
1108 struct ipl_parameter_block *reipl_block;
1109 unsigned long size;
1110
1111 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1112 if (!reipl_block)
1113 goto out;
1114 /*
1115 * If we have an OS info reipl block, this will be used
1116 */
1117 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1118 memcpy(reipl_block_fcp, reipl_block, size);
1119 reipl_type = IPL_TYPE_FCP;
1120 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1121 memcpy(reipl_block_ccw, reipl_block, size);
1122 reipl_type = IPL_TYPE_CCW;
1123 }
1124out:
1125 return reipl_set_type(reipl_type);
1126}
1127
1128static int __init reipl_init(void)
1129{
1130 int rc;
1131
1132 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1133 if (!reipl_kset)
1134 return -ENOMEM;
1135 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1136 if (rc) {
1137 kset_unregister(reipl_kset);
1138 return rc;
1139 }
1140 rc = reipl_ccw_init();
1141 if (rc)
1142 return rc;
1143 rc = reipl_fcp_init();
1144 if (rc)
1145 return rc;
1146 rc = reipl_nss_init();
1147 if (rc)
1148 return rc;
1149 return reipl_type_init();
1150}
1151
1152static struct shutdown_action __refdata reipl_action = {
1153 .name = SHUTDOWN_ACTION_REIPL_STR,
1154 .fn = reipl_run,
1155 .init = reipl_init,
1156};
1157
1158/*
1159 * dump shutdown action: Dump Linux on shutdown.
1160 */
1161
1162/* FCP dump device attributes */
1163
1164DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1165 dump_block_fcp->ipl_info.fcp.wwpn);
1166DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1167 dump_block_fcp->ipl_info.fcp.lun);
1168DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1169 dump_block_fcp->ipl_info.fcp.bootprog);
1170DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1171 dump_block_fcp->ipl_info.fcp.br_lba);
1172DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1173 dump_block_fcp->ipl_info.fcp.devno);
1174
1175static struct attribute *dump_fcp_attrs[] = {
1176 &sys_dump_fcp_device_attr.attr,
1177 &sys_dump_fcp_wwpn_attr.attr,
1178 &sys_dump_fcp_lun_attr.attr,
1179 &sys_dump_fcp_bootprog_attr.attr,
1180 &sys_dump_fcp_br_lba_attr.attr,
1181 NULL,
1182};
1183
1184static struct attribute_group dump_fcp_attr_group = {
1185 .name = IPL_FCP_STR,
1186 .attrs = dump_fcp_attrs,
1187};
1188
1189/* CCW dump device attributes */
1190DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1191
1192static struct attribute *dump_ccw_attrs[] = {
1193 &sys_dump_ccw_device_attr.attr,
1194 NULL,
1195};
1196
1197static struct attribute_group dump_ccw_attr_group = {
1198 .name = IPL_CCW_STR,
1199 .attrs = dump_ccw_attrs,
1200};
1201
1202/* dump type */
1203
1204static int dump_set_type(enum dump_type type)
1205{
1206 if (!(dump_capabilities & type))
1207 return -EINVAL;
1208 dump_type = type;
1209 return 0;
1210}
1211
1212static ssize_t dump_type_show(struct kobject *kobj,
1213 struct kobj_attribute *attr, char *page)
1214{
1215 return sprintf(page, "%s\n", dump_type_str(dump_type));
1216}
1217
1218static ssize_t dump_type_store(struct kobject *kobj,
1219 struct kobj_attribute *attr,
1220 const char *buf, size_t len)
1221{
1222 int rc = -EINVAL;
1223
1224 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1225 rc = dump_set_type(DUMP_TYPE_NONE);
1226 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1227 rc = dump_set_type(DUMP_TYPE_CCW);
1228 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1229 rc = dump_set_type(DUMP_TYPE_FCP);
1230 return (rc != 0) ? rc : len;
1231}
1232
1233static struct kobj_attribute dump_type_attr =
1234 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1235
1236static struct kset *dump_kset;
1237
1238static void diag308_dump(void *dump_block)
1239{
1240 diag308(DIAG308_SET, dump_block);
1241 while (1) {
1242 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1243 break;
1244 udelay_simple(USEC_PER_SEC);
1245 }
1246}
1247
1248static void __dump_run(void *unused)
1249{
1250 switch (dump_type) {
1251 case DUMP_TYPE_CCW:
1252 diag308_dump(dump_block_ccw);
1253 break;
1254 case DUMP_TYPE_FCP:
1255 diag308_dump(dump_block_fcp);
1256 break;
1257 default:
1258 break;
1259 }
1260}
1261
1262static void dump_run(struct shutdown_trigger *trigger)
1263{
1264 if (dump_type == DUMP_TYPE_NONE)
1265 return;
1266 smp_send_stop();
1267 smp_call_ipl_cpu(__dump_run, NULL);
1268}
1269
1270static int __init dump_ccw_init(void)
1271{
1272 int rc;
1273
1274 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1275 if (!dump_block_ccw)
1276 return -ENOMEM;
1277 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1278 if (rc) {
1279 free_page((unsigned long)dump_block_ccw);
1280 return rc;
1281 }
1282 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1283 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1284 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1285 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1286 dump_capabilities |= DUMP_TYPE_CCW;
1287 return 0;
1288}
1289
1290static int __init dump_fcp_init(void)
1291{
1292 int rc;
1293
1294 if (!sclp_ipl_info.has_dump)
1295 return 0; /* LDIPL DUMP is not installed */
1296 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1297 if (!dump_block_fcp)
1298 return -ENOMEM;
1299 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1300 if (rc) {
1301 free_page((unsigned long)dump_block_fcp);
1302 return rc;
1303 }
1304 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1305 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1306 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1307 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1308 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1309 dump_capabilities |= DUMP_TYPE_FCP;
1310 return 0;
1311}
1312
1313static int __init dump_init(void)
1314{
1315 int rc;
1316
1317 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1318 if (!dump_kset)
1319 return -ENOMEM;
1320 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1321 if (rc) {
1322 kset_unregister(dump_kset);
1323 return rc;
1324 }
1325 rc = dump_ccw_init();
1326 if (rc)
1327 return rc;
1328 rc = dump_fcp_init();
1329 if (rc)
1330 return rc;
1331 dump_set_type(DUMP_TYPE_NONE);
1332 return 0;
1333}
1334
1335static struct shutdown_action __refdata dump_action = {
1336 .name = SHUTDOWN_ACTION_DUMP_STR,
1337 .fn = dump_run,
1338 .init = dump_init,
1339};
1340
1341static void dump_reipl_run(struct shutdown_trigger *trigger)
1342{
1343 unsigned long ipib = (unsigned long) reipl_block_actual;
1344 unsigned int csum;
1345
1346 csum = (__force unsigned int)
1347 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1348 mem_assign_absolute(S390_lowcore.ipib, ipib);
1349 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1350 dump_run(trigger);
1351}
1352
1353static struct shutdown_action __refdata dump_reipl_action = {
1354 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1355 .fn = dump_reipl_run,
1356};
1357
1358/*
1359 * vmcmd shutdown action: Trigger vm command on shutdown.
1360 */
1361
1362static char vmcmd_on_reboot[128];
1363static char vmcmd_on_panic[128];
1364static char vmcmd_on_halt[128];
1365static char vmcmd_on_poff[128];
1366static char vmcmd_on_restart[128];
1367
1368DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1369DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1370DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1371DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1372DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1373
1374static struct attribute *vmcmd_attrs[] = {
1375 &sys_vmcmd_on_reboot_attr.attr,
1376 &sys_vmcmd_on_panic_attr.attr,
1377 &sys_vmcmd_on_halt_attr.attr,
1378 &sys_vmcmd_on_poff_attr.attr,
1379 &sys_vmcmd_on_restart_attr.attr,
1380 NULL,
1381};
1382
1383static struct attribute_group vmcmd_attr_group = {
1384 .attrs = vmcmd_attrs,
1385};
1386
1387static struct kset *vmcmd_kset;
1388
1389static void vmcmd_run(struct shutdown_trigger *trigger)
1390{
1391 char *cmd;
1392
1393 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1394 cmd = vmcmd_on_reboot;
1395 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1396 cmd = vmcmd_on_panic;
1397 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1398 cmd = vmcmd_on_halt;
1399 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1400 cmd = vmcmd_on_poff;
1401 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1402 cmd = vmcmd_on_restart;
1403 else
1404 return;
1405
1406 if (strlen(cmd) == 0)
1407 return;
1408 __cpcmd(cmd, NULL, 0, NULL);
1409}
1410
1411static int vmcmd_init(void)
1412{
1413 if (!MACHINE_IS_VM)
1414 return -EOPNOTSUPP;
1415 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1416 if (!vmcmd_kset)
1417 return -ENOMEM;
1418 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1419}
1420
1421static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1422 vmcmd_run, vmcmd_init};
1423
1424/*
1425 * stop shutdown action: Stop Linux on shutdown.
1426 */
1427
1428static void stop_run(struct shutdown_trigger *trigger)
1429{
1430 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1431 strcmp(trigger->name, ON_RESTART_STR) == 0)
1432 disabled_wait((unsigned long) __builtin_return_address(0));
1433 smp_stop_cpu();
1434}
1435
1436static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1437 stop_run, NULL};
1438
1439/* action list */
1440
1441static struct shutdown_action *shutdown_actions_list[] = {
1442 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1443 &vmcmd_action, &stop_action};
1444#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1445
1446/*
1447 * Trigger section
1448 */
1449
1450static struct kset *shutdown_actions_kset;
1451
1452static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1453 size_t len)
1454{
1455 int i;
1456
1457 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1458 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1459 if (shutdown_actions_list[i]->init_rc) {
1460 return shutdown_actions_list[i]->init_rc;
1461 } else {
1462 trigger->action = shutdown_actions_list[i];
1463 return len;
1464 }
1465 }
1466 }
1467 return -EINVAL;
1468}
1469
1470/* on reipl */
1471
1472static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1473 &reipl_action};
1474
1475static ssize_t on_reboot_show(struct kobject *kobj,
1476 struct kobj_attribute *attr, char *page)
1477{
1478 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1479}
1480
1481static ssize_t on_reboot_store(struct kobject *kobj,
1482 struct kobj_attribute *attr,
1483 const char *buf, size_t len)
1484{
1485 return set_trigger(buf, &on_reboot_trigger, len);
1486}
1487static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1488
1489static void do_machine_restart(char *__unused)
1490{
1491 smp_send_stop();
1492 on_reboot_trigger.action->fn(&on_reboot_trigger);
1493 reipl_run(NULL);
1494}
1495void (*_machine_restart)(char *command) = do_machine_restart;
1496
1497/* on panic */
1498
1499static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1500
1501static ssize_t on_panic_show(struct kobject *kobj,
1502 struct kobj_attribute *attr, char *page)
1503{
1504 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1505}
1506
1507static ssize_t on_panic_store(struct kobject *kobj,
1508 struct kobj_attribute *attr,
1509 const char *buf, size_t len)
1510{
1511 return set_trigger(buf, &on_panic_trigger, len);
1512}
1513static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1514
1515static void do_panic(void)
1516{
1517 lgr_info_log();
1518 on_panic_trigger.action->fn(&on_panic_trigger);
1519 stop_run(&on_panic_trigger);
1520}
1521
1522/* on restart */
1523
1524static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1525 &stop_action};
1526
1527static ssize_t on_restart_show(struct kobject *kobj,
1528 struct kobj_attribute *attr, char *page)
1529{
1530 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1531}
1532
1533static ssize_t on_restart_store(struct kobject *kobj,
1534 struct kobj_attribute *attr,
1535 const char *buf, size_t len)
1536{
1537 return set_trigger(buf, &on_restart_trigger, len);
1538}
1539static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1540
1541static void __do_restart(void *ignore)
1542{
1543 __arch_local_irq_stosm(0x04); /* enable DAT */
1544 smp_send_stop();
1545#ifdef CONFIG_CRASH_DUMP
1546 crash_kexec(NULL);
1547#endif
1548 on_restart_trigger.action->fn(&on_restart_trigger);
1549 stop_run(&on_restart_trigger);
1550}
1551
1552void do_restart(void)
1553{
1554 tracing_off();
1555 debug_locks_off();
1556 lgr_info_log();
1557 smp_call_online_cpu(__do_restart, NULL);
1558}
1559
1560/* on halt */
1561
1562static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1563
1564static ssize_t on_halt_show(struct kobject *kobj,
1565 struct kobj_attribute *attr, char *page)
1566{
1567 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1568}
1569
1570static ssize_t on_halt_store(struct kobject *kobj,
1571 struct kobj_attribute *attr,
1572 const char *buf, size_t len)
1573{
1574 return set_trigger(buf, &on_halt_trigger, len);
1575}
1576static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1577
1578static void do_machine_halt(void)
1579{
1580 smp_send_stop();
1581 on_halt_trigger.action->fn(&on_halt_trigger);
1582 stop_run(&on_halt_trigger);
1583}
1584void (*_machine_halt)(void) = do_machine_halt;
1585
1586/* on power off */
1587
1588static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1589
1590static ssize_t on_poff_show(struct kobject *kobj,
1591 struct kobj_attribute *attr, char *page)
1592{
1593 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1594}
1595
1596static ssize_t on_poff_store(struct kobject *kobj,
1597 struct kobj_attribute *attr,
1598 const char *buf, size_t len)
1599{
1600 return set_trigger(buf, &on_poff_trigger, len);
1601}
1602static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1603
1604static void do_machine_power_off(void)
1605{
1606 smp_send_stop();
1607 on_poff_trigger.action->fn(&on_poff_trigger);
1608 stop_run(&on_poff_trigger);
1609}
1610void (*_machine_power_off)(void) = do_machine_power_off;
1611
1612static struct attribute *shutdown_action_attrs[] = {
1613 &on_restart_attr.attr,
1614 &on_reboot_attr.attr,
1615 &on_panic_attr.attr,
1616 &on_halt_attr.attr,
1617 &on_poff_attr.attr,
1618 NULL,
1619};
1620
1621static struct attribute_group shutdown_action_attr_group = {
1622 .attrs = shutdown_action_attrs,
1623};
1624
1625static void __init shutdown_triggers_init(void)
1626{
1627 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1628 firmware_kobj);
1629 if (!shutdown_actions_kset)
1630 goto fail;
1631 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1632 &shutdown_action_attr_group))
1633 goto fail;
1634 return;
1635fail:
1636 panic("shutdown_triggers_init failed\n");
1637}
1638
1639static void __init shutdown_actions_init(void)
1640{
1641 int i;
1642
1643 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1644 if (!shutdown_actions_list[i]->init)
1645 continue;
1646 shutdown_actions_list[i]->init_rc =
1647 shutdown_actions_list[i]->init();
1648 }
1649}
1650
1651static int __init s390_ipl_init(void)
1652{
1653 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1654
1655 sclp_early_get_ipl_info(&sclp_ipl_info);
1656 /*
1657 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1658 * returned by read SCP info is invalid (contains EBCDIC blanks)
1659 * when the system has been booted via diag308. In that case we use
1660 * the value from diag308, if available.
1661 *
1662 * There are also systems where diag308 store does not work in
1663 * case the system is booted from HMC. Fortunately in this case
1664 * READ SCP info provides the correct value.
1665 */
1666 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
1667 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm, LOADPARM_LEN);
1668 shutdown_actions_init();
1669 shutdown_triggers_init();
1670 return 0;
1671}
1672
1673__initcall(s390_ipl_init);
1674
1675static void __init strncpy_skip_quote(char *dst, char *src, int n)
1676{
1677 int sx, dx;
1678
1679 dx = 0;
1680 for (sx = 0; src[sx] != 0; sx++) {
1681 if (src[sx] == '"')
1682 continue;
1683 dst[dx++] = src[sx];
1684 if (dx >= n)
1685 break;
1686 }
1687}
1688
1689static int __init vmcmd_on_reboot_setup(char *str)
1690{
1691 if (!MACHINE_IS_VM)
1692 return 1;
1693 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1694 vmcmd_on_reboot[127] = 0;
1695 on_reboot_trigger.action = &vmcmd_action;
1696 return 1;
1697}
1698__setup("vmreboot=", vmcmd_on_reboot_setup);
1699
1700static int __init vmcmd_on_panic_setup(char *str)
1701{
1702 if (!MACHINE_IS_VM)
1703 return 1;
1704 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1705 vmcmd_on_panic[127] = 0;
1706 on_panic_trigger.action = &vmcmd_action;
1707 return 1;
1708}
1709__setup("vmpanic=", vmcmd_on_panic_setup);
1710
1711static int __init vmcmd_on_halt_setup(char *str)
1712{
1713 if (!MACHINE_IS_VM)
1714 return 1;
1715 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1716 vmcmd_on_halt[127] = 0;
1717 on_halt_trigger.action = &vmcmd_action;
1718 return 1;
1719}
1720__setup("vmhalt=", vmcmd_on_halt_setup);
1721
1722static int __init vmcmd_on_poff_setup(char *str)
1723{
1724 if (!MACHINE_IS_VM)
1725 return 1;
1726 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1727 vmcmd_on_poff[127] = 0;
1728 on_poff_trigger.action = &vmcmd_action;
1729 return 1;
1730}
1731__setup("vmpoff=", vmcmd_on_poff_setup);
1732
1733static int on_panic_notify(struct notifier_block *self,
1734 unsigned long event, void *data)
1735{
1736 do_panic();
1737 return NOTIFY_OK;
1738}
1739
1740static struct notifier_block on_panic_nb = {
1741 .notifier_call = on_panic_notify,
1742 .priority = INT_MIN,
1743};
1744
1745void __init setup_ipl(void)
1746{
1747 BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
1748
1749 ipl_info.type = get_ipl_type();
1750 switch (ipl_info.type) {
1751 case IPL_TYPE_CCW:
1752 ipl_info.data.ccw.dev_id.ssid = ipl_block.ipl_info.ccw.ssid;
1753 ipl_info.data.ccw.dev_id.devno = ipl_block.ipl_info.ccw.devno;
1754 break;
1755 case IPL_TYPE_FCP:
1756 case IPL_TYPE_FCP_DUMP:
1757 ipl_info.data.fcp.dev_id.ssid = 0;
1758 ipl_info.data.fcp.dev_id.devno = ipl_block.ipl_info.fcp.devno;
1759 ipl_info.data.fcp.wwpn = ipl_block.ipl_info.fcp.wwpn;
1760 ipl_info.data.fcp.lun = ipl_block.ipl_info.fcp.lun;
1761 break;
1762 case IPL_TYPE_NSS:
1763 case IPL_TYPE_UNKNOWN:
1764 /* We have no info to copy */
1765 break;
1766 }
1767 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1768}
1769
1770void __init ipl_store_parameters(void)
1771{
1772 int rc;
1773
1774 rc = diag308(DIAG308_STORE, &ipl_block);
1775 if (rc == DIAG308_RC_OK && ipl_block.hdr.version <= IPL_MAX_SUPPORTED_VERSION)
1776 ipl_block_valid = 1;
1777}
1778
1779void s390_reset_system(void)
1780{
1781 /* Disable prefixing */
1782 set_prefix(0);
1783
1784 /* Disable lowcore protection */
1785 __ctl_clear_bit(0, 28);
1786 diag308_reset();
1787}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * ipl/reipl/dump support for Linux on s390.
4 *
5 * Copyright IBM Corp. 2005, 2012
6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 * Heiko Carstens <heiko.carstens@de.ibm.com>
8 * Volker Sameske <sameske@de.ibm.com>
9 */
10
11#include <linux/types.h>
12#include <linux/export.h>
13#include <linux/init.h>
14#include <linux/device.h>
15#include <linux/delay.h>
16#include <linux/panic_notifier.h>
17#include <linux/reboot.h>
18#include <linux/ctype.h>
19#include <linux/fs.h>
20#include <linux/gfp.h>
21#include <linux/crash_dump.h>
22#include <linux/debug_locks.h>
23#include <asm/diag.h>
24#include <asm/ipl.h>
25#include <asm/smp.h>
26#include <asm/setup.h>
27#include <asm/cpcmd.h>
28#include <asm/ebcdic.h>
29#include <asm/sclp.h>
30#include <asm/checksum.h>
31#include <asm/debug.h>
32#include <asm/os_info.h>
33#include <asm/sections.h>
34#include <asm/boot_data.h>
35#include "entry.h"
36
37#define IPL_PARM_BLOCK_VERSION 0
38
39#define IPL_UNKNOWN_STR "unknown"
40#define IPL_CCW_STR "ccw"
41#define IPL_FCP_STR "fcp"
42#define IPL_FCP_DUMP_STR "fcp_dump"
43#define IPL_NVME_STR "nvme"
44#define IPL_NVME_DUMP_STR "nvme_dump"
45#define IPL_NSS_STR "nss"
46
47#define DUMP_CCW_STR "ccw"
48#define DUMP_FCP_STR "fcp"
49#define DUMP_NVME_STR "nvme"
50#define DUMP_NONE_STR "none"
51
52/*
53 * Four shutdown trigger types are supported:
54 * - panic
55 * - halt
56 * - power off
57 * - reipl
58 * - restart
59 */
60#define ON_PANIC_STR "on_panic"
61#define ON_HALT_STR "on_halt"
62#define ON_POFF_STR "on_poff"
63#define ON_REIPL_STR "on_reboot"
64#define ON_RESTART_STR "on_restart"
65
66struct shutdown_action;
67struct shutdown_trigger {
68 char *name;
69 struct shutdown_action *action;
70};
71
72/*
73 * The following shutdown action types are supported:
74 */
75#define SHUTDOWN_ACTION_IPL_STR "ipl"
76#define SHUTDOWN_ACTION_REIPL_STR "reipl"
77#define SHUTDOWN_ACTION_DUMP_STR "dump"
78#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
79#define SHUTDOWN_ACTION_STOP_STR "stop"
80#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
81
82struct shutdown_action {
83 char *name;
84 void (*fn) (struct shutdown_trigger *trigger);
85 int (*init) (void);
86 int init_rc;
87};
88
89static char *ipl_type_str(enum ipl_type type)
90{
91 switch (type) {
92 case IPL_TYPE_CCW:
93 return IPL_CCW_STR;
94 case IPL_TYPE_FCP:
95 return IPL_FCP_STR;
96 case IPL_TYPE_FCP_DUMP:
97 return IPL_FCP_DUMP_STR;
98 case IPL_TYPE_NSS:
99 return IPL_NSS_STR;
100 case IPL_TYPE_NVME:
101 return IPL_NVME_STR;
102 case IPL_TYPE_NVME_DUMP:
103 return IPL_NVME_DUMP_STR;
104 case IPL_TYPE_UNKNOWN:
105 default:
106 return IPL_UNKNOWN_STR;
107 }
108}
109
110enum dump_type {
111 DUMP_TYPE_NONE = 1,
112 DUMP_TYPE_CCW = 2,
113 DUMP_TYPE_FCP = 4,
114 DUMP_TYPE_NVME = 8,
115};
116
117static char *dump_type_str(enum dump_type type)
118{
119 switch (type) {
120 case DUMP_TYPE_NONE:
121 return DUMP_NONE_STR;
122 case DUMP_TYPE_CCW:
123 return DUMP_CCW_STR;
124 case DUMP_TYPE_FCP:
125 return DUMP_FCP_STR;
126 case DUMP_TYPE_NVME:
127 return DUMP_NVME_STR;
128 default:
129 return NULL;
130 }
131}
132
133int __bootdata_preserved(ipl_block_valid);
134struct ipl_parameter_block __bootdata_preserved(ipl_block);
135int __bootdata_preserved(ipl_secure_flag);
136
137unsigned long __bootdata_preserved(ipl_cert_list_addr);
138unsigned long __bootdata_preserved(ipl_cert_list_size);
139
140unsigned long __bootdata(early_ipl_comp_list_addr);
141unsigned long __bootdata(early_ipl_comp_list_size);
142
143static int reipl_capabilities = IPL_TYPE_UNKNOWN;
144
145static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
146static struct ipl_parameter_block *reipl_block_fcp;
147static struct ipl_parameter_block *reipl_block_nvme;
148static struct ipl_parameter_block *reipl_block_ccw;
149static struct ipl_parameter_block *reipl_block_nss;
150static struct ipl_parameter_block *reipl_block_actual;
151
152static int dump_capabilities = DUMP_TYPE_NONE;
153static enum dump_type dump_type = DUMP_TYPE_NONE;
154static struct ipl_parameter_block *dump_block_fcp;
155static struct ipl_parameter_block *dump_block_nvme;
156static struct ipl_parameter_block *dump_block_ccw;
157
158static struct sclp_ipl_info sclp_ipl_info;
159
160static bool reipl_nvme_clear;
161static bool reipl_fcp_clear;
162static bool reipl_ccw_clear;
163
164static inline int __diag308(unsigned long subcode, void *addr)
165{
166 union register_pair r1;
167
168 r1.even = (unsigned long) addr;
169 r1.odd = 0;
170 asm volatile(
171 " diag %[r1],%[subcode],0x308\n"
172 "0: nopr %%r7\n"
173 EX_TABLE(0b,0b)
174 : [r1] "+&d" (r1.pair)
175 : [subcode] "d" (subcode)
176 : "cc", "memory");
177 return r1.odd;
178}
179
180int diag308(unsigned long subcode, void *addr)
181{
182 diag_stat_inc(DIAG_STAT_X308);
183 return __diag308(subcode, addr);
184}
185EXPORT_SYMBOL_GPL(diag308);
186
187/* SYSFS */
188
189#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
190static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
191 struct kobj_attribute *attr, \
192 char *page) \
193{ \
194 return scnprintf(page, PAGE_SIZE, _format, ##args); \
195}
196
197#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
198static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
199 struct kobj_attribute *attr, \
200 const char *buf, size_t len) \
201{ \
202 unsigned long long ssid, devno; \
203 \
204 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
205 return -EINVAL; \
206 \
207 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
208 return -EINVAL; \
209 \
210 _ipl_blk.ssid = ssid; \
211 _ipl_blk.devno = devno; \
212 return len; \
213}
214
215#define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
216IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
217 _ipl_blk.ssid, _ipl_blk.devno); \
218IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
219static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
220 __ATTR(_name, (S_IRUGO | S_IWUSR), \
221 sys_##_prefix##_##_name##_show, \
222 sys_##_prefix##_##_name##_store) \
223
224#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
225IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
226static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
227 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
228
229#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
230IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
231static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
232 struct kobj_attribute *attr, \
233 const char *buf, size_t len) \
234{ \
235 unsigned long long value; \
236 if (sscanf(buf, _fmt_in, &value) != 1) \
237 return -EINVAL; \
238 _value = value; \
239 return len; \
240} \
241static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
242 __ATTR(_name,(S_IRUGO | S_IWUSR), \
243 sys_##_prefix##_##_name##_show, \
244 sys_##_prefix##_##_name##_store)
245
246#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
247IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
248static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
249 struct kobj_attribute *attr, \
250 const char *buf, size_t len) \
251{ \
252 strncpy(_value, buf, sizeof(_value) - 1); \
253 strim(_value); \
254 return len; \
255} \
256static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
257 __ATTR(_name,(S_IRUGO | S_IWUSR), \
258 sys_##_prefix##_##_name##_show, \
259 sys_##_prefix##_##_name##_store)
260
261/*
262 * ipl section
263 */
264
265static __init enum ipl_type get_ipl_type(void)
266{
267 if (!ipl_block_valid)
268 return IPL_TYPE_UNKNOWN;
269
270 switch (ipl_block.pb0_hdr.pbt) {
271 case IPL_PBT_CCW:
272 return IPL_TYPE_CCW;
273 case IPL_PBT_FCP:
274 if (ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP)
275 return IPL_TYPE_FCP_DUMP;
276 else
277 return IPL_TYPE_FCP;
278 case IPL_PBT_NVME:
279 if (ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
280 return IPL_TYPE_NVME_DUMP;
281 else
282 return IPL_TYPE_NVME;
283 }
284 return IPL_TYPE_UNKNOWN;
285}
286
287struct ipl_info ipl_info;
288EXPORT_SYMBOL_GPL(ipl_info);
289
290static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
291 char *page)
292{
293 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
294}
295
296static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
297
298static ssize_t ipl_secure_show(struct kobject *kobj,
299 struct kobj_attribute *attr, char *page)
300{
301 return sprintf(page, "%i\n", !!ipl_secure_flag);
302}
303
304static struct kobj_attribute sys_ipl_secure_attr =
305 __ATTR(secure, 0444, ipl_secure_show, NULL);
306
307static ssize_t ipl_has_secure_show(struct kobject *kobj,
308 struct kobj_attribute *attr, char *page)
309{
310 return sprintf(page, "%i\n", !!sclp.has_sipl);
311}
312
313static struct kobj_attribute sys_ipl_has_secure_attr =
314 __ATTR(has_secure, 0444, ipl_has_secure_show, NULL);
315
316static ssize_t ipl_vm_parm_show(struct kobject *kobj,
317 struct kobj_attribute *attr, char *page)
318{
319 char parm[DIAG308_VMPARM_SIZE + 1] = {};
320
321 if (ipl_block_valid && (ipl_block.pb0_hdr.pbt == IPL_PBT_CCW))
322 ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block);
323 return sprintf(page, "%s\n", parm);
324}
325
326static struct kobj_attribute sys_ipl_vm_parm_attr =
327 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
328
329static ssize_t sys_ipl_device_show(struct kobject *kobj,
330 struct kobj_attribute *attr, char *page)
331{
332 switch (ipl_info.type) {
333 case IPL_TYPE_CCW:
334 return sprintf(page, "0.%x.%04x\n", ipl_block.ccw.ssid,
335 ipl_block.ccw.devno);
336 case IPL_TYPE_FCP:
337 case IPL_TYPE_FCP_DUMP:
338 return sprintf(page, "0.0.%04x\n", ipl_block.fcp.devno);
339 case IPL_TYPE_NVME:
340 case IPL_TYPE_NVME_DUMP:
341 return sprintf(page, "%08ux\n", ipl_block.nvme.fid);
342 default:
343 return 0;
344 }
345}
346
347static struct kobj_attribute sys_ipl_device_attr =
348 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
349
350static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
351 struct bin_attribute *attr, char *buf,
352 loff_t off, size_t count)
353{
354 return memory_read_from_buffer(buf, count, &off, &ipl_block,
355 ipl_block.hdr.len);
356}
357static struct bin_attribute ipl_parameter_attr =
358 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
359 PAGE_SIZE);
360
361static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
362 struct bin_attribute *attr, char *buf,
363 loff_t off, size_t count)
364{
365 unsigned int size = ipl_block.fcp.scp_data_len;
366 void *scp_data = &ipl_block.fcp.scp_data;
367
368 return memory_read_from_buffer(buf, count, &off, scp_data, size);
369}
370
371static ssize_t ipl_nvme_scp_data_read(struct file *filp, struct kobject *kobj,
372 struct bin_attribute *attr, char *buf,
373 loff_t off, size_t count)
374{
375 unsigned int size = ipl_block.nvme.scp_data_len;
376 void *scp_data = &ipl_block.nvme.scp_data;
377
378 return memory_read_from_buffer(buf, count, &off, scp_data, size);
379}
380
381static struct bin_attribute ipl_scp_data_attr =
382 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
383
384static struct bin_attribute ipl_nvme_scp_data_attr =
385 __BIN_ATTR(scp_data, S_IRUGO, ipl_nvme_scp_data_read, NULL, PAGE_SIZE);
386
387static struct bin_attribute *ipl_fcp_bin_attrs[] = {
388 &ipl_parameter_attr,
389 &ipl_scp_data_attr,
390 NULL,
391};
392
393static struct bin_attribute *ipl_nvme_bin_attrs[] = {
394 &ipl_parameter_attr,
395 &ipl_nvme_scp_data_attr,
396 NULL,
397};
398
399/* FCP ipl device attributes */
400
401DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
402 (unsigned long long)ipl_block.fcp.wwpn);
403DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
404 (unsigned long long)ipl_block.fcp.lun);
405DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
406 (unsigned long long)ipl_block.fcp.bootprog);
407DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
408 (unsigned long long)ipl_block.fcp.br_lba);
409
410/* NVMe ipl device attributes */
411DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n",
412 (unsigned long long)ipl_block.nvme.fid);
413DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n",
414 (unsigned long long)ipl_block.nvme.nsid);
415DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n",
416 (unsigned long long)ipl_block.nvme.bootprog);
417DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n",
418 (unsigned long long)ipl_block.nvme.br_lba);
419
420static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
421 struct kobj_attribute *attr, char *page)
422{
423 char loadparm[LOADPARM_LEN + 1] = {};
424
425 if (!sclp_ipl_info.is_valid)
426 return sprintf(page, "#unknown#\n");
427 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
428 EBCASC(loadparm, LOADPARM_LEN);
429 strim(loadparm);
430 return sprintf(page, "%s\n", loadparm);
431}
432
433static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
434 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
435
436static struct attribute *ipl_fcp_attrs[] = {
437 &sys_ipl_type_attr.attr,
438 &sys_ipl_device_attr.attr,
439 &sys_ipl_fcp_wwpn_attr.attr,
440 &sys_ipl_fcp_lun_attr.attr,
441 &sys_ipl_fcp_bootprog_attr.attr,
442 &sys_ipl_fcp_br_lba_attr.attr,
443 &sys_ipl_ccw_loadparm_attr.attr,
444 &sys_ipl_secure_attr.attr,
445 &sys_ipl_has_secure_attr.attr,
446 NULL,
447};
448
449static struct attribute_group ipl_fcp_attr_group = {
450 .attrs = ipl_fcp_attrs,
451 .bin_attrs = ipl_fcp_bin_attrs,
452};
453
454static struct attribute *ipl_nvme_attrs[] = {
455 &sys_ipl_type_attr.attr,
456 &sys_ipl_nvme_fid_attr.attr,
457 &sys_ipl_nvme_nsid_attr.attr,
458 &sys_ipl_nvme_bootprog_attr.attr,
459 &sys_ipl_nvme_br_lba_attr.attr,
460 &sys_ipl_ccw_loadparm_attr.attr,
461 &sys_ipl_secure_attr.attr,
462 &sys_ipl_has_secure_attr.attr,
463 NULL,
464};
465
466static struct attribute_group ipl_nvme_attr_group = {
467 .attrs = ipl_nvme_attrs,
468 .bin_attrs = ipl_nvme_bin_attrs,
469};
470
471
472/* CCW ipl device attributes */
473
474static struct attribute *ipl_ccw_attrs_vm[] = {
475 &sys_ipl_type_attr.attr,
476 &sys_ipl_device_attr.attr,
477 &sys_ipl_ccw_loadparm_attr.attr,
478 &sys_ipl_vm_parm_attr.attr,
479 &sys_ipl_secure_attr.attr,
480 &sys_ipl_has_secure_attr.attr,
481 NULL,
482};
483
484static struct attribute *ipl_ccw_attrs_lpar[] = {
485 &sys_ipl_type_attr.attr,
486 &sys_ipl_device_attr.attr,
487 &sys_ipl_ccw_loadparm_attr.attr,
488 &sys_ipl_secure_attr.attr,
489 &sys_ipl_has_secure_attr.attr,
490 NULL,
491};
492
493static struct attribute_group ipl_ccw_attr_group_vm = {
494 .attrs = ipl_ccw_attrs_vm,
495};
496
497static struct attribute_group ipl_ccw_attr_group_lpar = {
498 .attrs = ipl_ccw_attrs_lpar
499};
500
501/* UNKNOWN ipl device attributes */
502
503static struct attribute *ipl_unknown_attrs[] = {
504 &sys_ipl_type_attr.attr,
505 NULL,
506};
507
508static struct attribute_group ipl_unknown_attr_group = {
509 .attrs = ipl_unknown_attrs,
510};
511
512static struct kset *ipl_kset;
513
514static void __ipl_run(void *unused)
515{
516 __bpon();
517 diag308(DIAG308_LOAD_CLEAR, NULL);
518}
519
520static void ipl_run(struct shutdown_trigger *trigger)
521{
522 smp_call_ipl_cpu(__ipl_run, NULL);
523}
524
525static int __init ipl_init(void)
526{
527 int rc;
528
529 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
530 if (!ipl_kset) {
531 rc = -ENOMEM;
532 goto out;
533 }
534 switch (ipl_info.type) {
535 case IPL_TYPE_CCW:
536 if (MACHINE_IS_VM)
537 rc = sysfs_create_group(&ipl_kset->kobj,
538 &ipl_ccw_attr_group_vm);
539 else
540 rc = sysfs_create_group(&ipl_kset->kobj,
541 &ipl_ccw_attr_group_lpar);
542 break;
543 case IPL_TYPE_FCP:
544 case IPL_TYPE_FCP_DUMP:
545 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
546 break;
547 case IPL_TYPE_NVME:
548 case IPL_TYPE_NVME_DUMP:
549 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group);
550 break;
551 default:
552 rc = sysfs_create_group(&ipl_kset->kobj,
553 &ipl_unknown_attr_group);
554 break;
555 }
556out:
557 if (rc)
558 panic("ipl_init failed: rc = %i\n", rc);
559
560 return 0;
561}
562
563static struct shutdown_action __refdata ipl_action = {
564 .name = SHUTDOWN_ACTION_IPL_STR,
565 .fn = ipl_run,
566 .init = ipl_init,
567};
568
569/*
570 * reipl shutdown action: Reboot Linux on shutdown.
571 */
572
573/* VM IPL PARM attributes */
574static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
575 char *page)
576{
577 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
578
579 ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
580 return sprintf(page, "%s\n", vmparm);
581}
582
583static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
584 size_t vmparm_max,
585 const char *buf, size_t len)
586{
587 int i, ip_len;
588
589 /* ignore trailing newline */
590 ip_len = len;
591 if ((len > 0) && (buf[len - 1] == '\n'))
592 ip_len--;
593
594 if (ip_len > vmparm_max)
595 return -EINVAL;
596
597 /* parm is used to store kernel options, check for common chars */
598 for (i = 0; i < ip_len; i++)
599 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
600 return -EINVAL;
601
602 memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
603 ipb->ccw.vm_parm_len = ip_len;
604 if (ip_len > 0) {
605 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
606 memcpy(ipb->ccw.vm_parm, buf, ip_len);
607 ASCEBC(ipb->ccw.vm_parm, ip_len);
608 } else {
609 ipb->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_VP;
610 }
611
612 return len;
613}
614
615/* NSS wrapper */
616static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
617 struct kobj_attribute *attr, char *page)
618{
619 return reipl_generic_vmparm_show(reipl_block_nss, page);
620}
621
622static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
623 struct kobj_attribute *attr,
624 const char *buf, size_t len)
625{
626 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
627}
628
629/* CCW wrapper */
630static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
631 struct kobj_attribute *attr, char *page)
632{
633 return reipl_generic_vmparm_show(reipl_block_ccw, page);
634}
635
636static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
637 struct kobj_attribute *attr,
638 const char *buf, size_t len)
639{
640 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
641}
642
643static struct kobj_attribute sys_reipl_nss_vmparm_attr =
644 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
645 reipl_nss_vmparm_store);
646static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
647 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
648 reipl_ccw_vmparm_store);
649
650/* FCP reipl device attributes */
651
652static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
653 struct bin_attribute *attr,
654 char *buf, loff_t off, size_t count)
655{
656 size_t size = reipl_block_fcp->fcp.scp_data_len;
657 void *scp_data = reipl_block_fcp->fcp.scp_data;
658
659 return memory_read_from_buffer(buf, count, &off, scp_data, size);
660}
661
662static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
663 struct bin_attribute *attr,
664 char *buf, loff_t off, size_t count)
665{
666 size_t scpdata_len = count;
667 size_t padding;
668
669
670 if (off)
671 return -EINVAL;
672
673 memcpy(reipl_block_fcp->fcp.scp_data, buf, count);
674 if (scpdata_len % 8) {
675 padding = 8 - (scpdata_len % 8);
676 memset(reipl_block_fcp->fcp.scp_data + scpdata_len,
677 0, padding);
678 scpdata_len += padding;
679 }
680
681 reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN + scpdata_len;
682 reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN + scpdata_len;
683 reipl_block_fcp->fcp.scp_data_len = scpdata_len;
684
685 return count;
686}
687static struct bin_attribute sys_reipl_fcp_scp_data_attr =
688 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
689 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
690
691static struct bin_attribute *reipl_fcp_bin_attrs[] = {
692 &sys_reipl_fcp_scp_data_attr,
693 NULL,
694};
695
696DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
697 reipl_block_fcp->fcp.wwpn);
698DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
699 reipl_block_fcp->fcp.lun);
700DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
701 reipl_block_fcp->fcp.bootprog);
702DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
703 reipl_block_fcp->fcp.br_lba);
704DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
705 reipl_block_fcp->fcp.devno);
706
707static void reipl_get_ascii_loadparm(char *loadparm,
708 struct ipl_parameter_block *ibp)
709{
710 memcpy(loadparm, ibp->common.loadparm, LOADPARM_LEN);
711 EBCASC(loadparm, LOADPARM_LEN);
712 loadparm[LOADPARM_LEN] = 0;
713 strim(loadparm);
714}
715
716static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
717 char *page)
718{
719 char buf[LOADPARM_LEN + 1];
720
721 reipl_get_ascii_loadparm(buf, ipb);
722 return sprintf(page, "%s\n", buf);
723}
724
725static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
726 const char *buf, size_t len)
727{
728 int i, lp_len;
729
730 /* ignore trailing newline */
731 lp_len = len;
732 if ((len > 0) && (buf[len - 1] == '\n'))
733 lp_len--;
734 /* loadparm can have max 8 characters and must not start with a blank */
735 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
736 return -EINVAL;
737 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
738 for (i = 0; i < lp_len; i++) {
739 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
740 (buf[i] == '.'))
741 continue;
742 return -EINVAL;
743 }
744 /* initialize loadparm with blanks */
745 memset(ipb->common.loadparm, ' ', LOADPARM_LEN);
746 /* copy and convert to ebcdic */
747 memcpy(ipb->common.loadparm, buf, lp_len);
748 ASCEBC(ipb->common.loadparm, LOADPARM_LEN);
749 ipb->common.flags |= IPL_PB0_FLAG_LOADPARM;
750 return len;
751}
752
753/* FCP wrapper */
754static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
755 struct kobj_attribute *attr, char *page)
756{
757 return reipl_generic_loadparm_show(reipl_block_fcp, page);
758}
759
760static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
761 struct kobj_attribute *attr,
762 const char *buf, size_t len)
763{
764 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
765}
766
767static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
768 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
769 reipl_fcp_loadparm_store);
770
771static ssize_t reipl_fcp_clear_show(struct kobject *kobj,
772 struct kobj_attribute *attr, char *page)
773{
774 return sprintf(page, "%u\n", reipl_fcp_clear);
775}
776
777static ssize_t reipl_fcp_clear_store(struct kobject *kobj,
778 struct kobj_attribute *attr,
779 const char *buf, size_t len)
780{
781 if (strtobool(buf, &reipl_fcp_clear) < 0)
782 return -EINVAL;
783 return len;
784}
785
786static struct attribute *reipl_fcp_attrs[] = {
787 &sys_reipl_fcp_device_attr.attr,
788 &sys_reipl_fcp_wwpn_attr.attr,
789 &sys_reipl_fcp_lun_attr.attr,
790 &sys_reipl_fcp_bootprog_attr.attr,
791 &sys_reipl_fcp_br_lba_attr.attr,
792 &sys_reipl_fcp_loadparm_attr.attr,
793 NULL,
794};
795
796static struct attribute_group reipl_fcp_attr_group = {
797 .attrs = reipl_fcp_attrs,
798 .bin_attrs = reipl_fcp_bin_attrs,
799};
800
801static struct kobj_attribute sys_reipl_fcp_clear_attr =
802 __ATTR(clear, 0644, reipl_fcp_clear_show, reipl_fcp_clear_store);
803
804/* NVME reipl device attributes */
805
806static ssize_t reipl_nvme_scpdata_read(struct file *filp, struct kobject *kobj,
807 struct bin_attribute *attr,
808 char *buf, loff_t off, size_t count)
809{
810 size_t size = reipl_block_nvme->nvme.scp_data_len;
811 void *scp_data = reipl_block_nvme->nvme.scp_data;
812
813 return memory_read_from_buffer(buf, count, &off, scp_data, size);
814}
815
816static ssize_t reipl_nvme_scpdata_write(struct file *filp, struct kobject *kobj,
817 struct bin_attribute *attr,
818 char *buf, loff_t off, size_t count)
819{
820 size_t scpdata_len = count;
821 size_t padding;
822
823 if (off)
824 return -EINVAL;
825
826 memcpy(reipl_block_nvme->nvme.scp_data, buf, count);
827 if (scpdata_len % 8) {
828 padding = 8 - (scpdata_len % 8);
829 memset(reipl_block_nvme->nvme.scp_data + scpdata_len,
830 0, padding);
831 scpdata_len += padding;
832 }
833
834 reipl_block_nvme->hdr.len = IPL_BP_FCP_LEN + scpdata_len;
835 reipl_block_nvme->nvme.len = IPL_BP0_FCP_LEN + scpdata_len;
836 reipl_block_nvme->nvme.scp_data_len = scpdata_len;
837
838 return count;
839}
840
841static struct bin_attribute sys_reipl_nvme_scp_data_attr =
842 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_nvme_scpdata_read,
843 reipl_nvme_scpdata_write, DIAG308_SCPDATA_SIZE);
844
845static struct bin_attribute *reipl_nvme_bin_attrs[] = {
846 &sys_reipl_nvme_scp_data_attr,
847 NULL,
848};
849
850DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n",
851 reipl_block_nvme->nvme.fid);
852DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n",
853 reipl_block_nvme->nvme.nsid);
854DEFINE_IPL_ATTR_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n",
855 reipl_block_nvme->nvme.bootprog);
856DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n",
857 reipl_block_nvme->nvme.br_lba);
858
859/* nvme wrapper */
860static ssize_t reipl_nvme_loadparm_show(struct kobject *kobj,
861 struct kobj_attribute *attr, char *page)
862{
863 return reipl_generic_loadparm_show(reipl_block_nvme, page);
864}
865
866static ssize_t reipl_nvme_loadparm_store(struct kobject *kobj,
867 struct kobj_attribute *attr,
868 const char *buf, size_t len)
869{
870 return reipl_generic_loadparm_store(reipl_block_nvme, buf, len);
871}
872
873static struct kobj_attribute sys_reipl_nvme_loadparm_attr =
874 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nvme_loadparm_show,
875 reipl_nvme_loadparm_store);
876
877static struct attribute *reipl_nvme_attrs[] = {
878 &sys_reipl_nvme_fid_attr.attr,
879 &sys_reipl_nvme_nsid_attr.attr,
880 &sys_reipl_nvme_bootprog_attr.attr,
881 &sys_reipl_nvme_br_lba_attr.attr,
882 &sys_reipl_nvme_loadparm_attr.attr,
883 NULL,
884};
885
886static struct attribute_group reipl_nvme_attr_group = {
887 .attrs = reipl_nvme_attrs,
888 .bin_attrs = reipl_nvme_bin_attrs
889};
890
891static ssize_t reipl_nvme_clear_show(struct kobject *kobj,
892 struct kobj_attribute *attr, char *page)
893{
894 return sprintf(page, "%u\n", reipl_nvme_clear);
895}
896
897static ssize_t reipl_nvme_clear_store(struct kobject *kobj,
898 struct kobj_attribute *attr,
899 const char *buf, size_t len)
900{
901 if (strtobool(buf, &reipl_nvme_clear) < 0)
902 return -EINVAL;
903 return len;
904}
905
906static struct kobj_attribute sys_reipl_nvme_clear_attr =
907 __ATTR(clear, 0644, reipl_nvme_clear_show, reipl_nvme_clear_store);
908
909/* CCW reipl device attributes */
910DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw);
911
912/* NSS wrapper */
913static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
914 struct kobj_attribute *attr, char *page)
915{
916 return reipl_generic_loadparm_show(reipl_block_nss, page);
917}
918
919static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
920 struct kobj_attribute *attr,
921 const char *buf, size_t len)
922{
923 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
924}
925
926/* CCW wrapper */
927static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
928 struct kobj_attribute *attr, char *page)
929{
930 return reipl_generic_loadparm_show(reipl_block_ccw, page);
931}
932
933static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
934 struct kobj_attribute *attr,
935 const char *buf, size_t len)
936{
937 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
938}
939
940static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
941 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
942 reipl_ccw_loadparm_store);
943
944static ssize_t reipl_ccw_clear_show(struct kobject *kobj,
945 struct kobj_attribute *attr, char *page)
946{
947 return sprintf(page, "%u\n", reipl_ccw_clear);
948}
949
950static ssize_t reipl_ccw_clear_store(struct kobject *kobj,
951 struct kobj_attribute *attr,
952 const char *buf, size_t len)
953{
954 if (strtobool(buf, &reipl_ccw_clear) < 0)
955 return -EINVAL;
956 return len;
957}
958
959static struct kobj_attribute sys_reipl_ccw_clear_attr =
960 __ATTR(clear, 0644, reipl_ccw_clear_show, reipl_ccw_clear_store);
961
962static struct attribute *reipl_ccw_attrs_vm[] = {
963 &sys_reipl_ccw_device_attr.attr,
964 &sys_reipl_ccw_loadparm_attr.attr,
965 &sys_reipl_ccw_vmparm_attr.attr,
966 &sys_reipl_ccw_clear_attr.attr,
967 NULL,
968};
969
970static struct attribute *reipl_ccw_attrs_lpar[] = {
971 &sys_reipl_ccw_device_attr.attr,
972 &sys_reipl_ccw_loadparm_attr.attr,
973 &sys_reipl_ccw_clear_attr.attr,
974 NULL,
975};
976
977static struct attribute_group reipl_ccw_attr_group_vm = {
978 .name = IPL_CCW_STR,
979 .attrs = reipl_ccw_attrs_vm,
980};
981
982static struct attribute_group reipl_ccw_attr_group_lpar = {
983 .name = IPL_CCW_STR,
984 .attrs = reipl_ccw_attrs_lpar,
985};
986
987
988/* NSS reipl device attributes */
989static void reipl_get_ascii_nss_name(char *dst,
990 struct ipl_parameter_block *ipb)
991{
992 memcpy(dst, ipb->ccw.nss_name, NSS_NAME_SIZE);
993 EBCASC(dst, NSS_NAME_SIZE);
994 dst[NSS_NAME_SIZE] = 0;
995}
996
997static ssize_t reipl_nss_name_show(struct kobject *kobj,
998 struct kobj_attribute *attr, char *page)
999{
1000 char nss_name[NSS_NAME_SIZE + 1] = {};
1001
1002 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
1003 return sprintf(page, "%s\n", nss_name);
1004}
1005
1006static ssize_t reipl_nss_name_store(struct kobject *kobj,
1007 struct kobj_attribute *attr,
1008 const char *buf, size_t len)
1009{
1010 int nss_len;
1011
1012 /* ignore trailing newline */
1013 nss_len = len;
1014 if ((len > 0) && (buf[len - 1] == '\n'))
1015 nss_len--;
1016
1017 if (nss_len > NSS_NAME_SIZE)
1018 return -EINVAL;
1019
1020 memset(reipl_block_nss->ccw.nss_name, 0x40, NSS_NAME_SIZE);
1021 if (nss_len > 0) {
1022 reipl_block_nss->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_NSS;
1023 memcpy(reipl_block_nss->ccw.nss_name, buf, nss_len);
1024 ASCEBC(reipl_block_nss->ccw.nss_name, nss_len);
1025 EBC_TOUPPER(reipl_block_nss->ccw.nss_name, nss_len);
1026 } else {
1027 reipl_block_nss->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_NSS;
1028 }
1029
1030 return len;
1031}
1032
1033static struct kobj_attribute sys_reipl_nss_name_attr =
1034 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
1035 reipl_nss_name_store);
1036
1037static struct kobj_attribute sys_reipl_nss_loadparm_attr =
1038 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
1039 reipl_nss_loadparm_store);
1040
1041static struct attribute *reipl_nss_attrs[] = {
1042 &sys_reipl_nss_name_attr.attr,
1043 &sys_reipl_nss_loadparm_attr.attr,
1044 &sys_reipl_nss_vmparm_attr.attr,
1045 NULL,
1046};
1047
1048static struct attribute_group reipl_nss_attr_group = {
1049 .name = IPL_NSS_STR,
1050 .attrs = reipl_nss_attrs,
1051};
1052
1053void set_os_info_reipl_block(void)
1054{
1055 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
1056 reipl_block_actual->hdr.len);
1057}
1058
1059/* reipl type */
1060
1061static int reipl_set_type(enum ipl_type type)
1062{
1063 if (!(reipl_capabilities & type))
1064 return -EINVAL;
1065
1066 switch(type) {
1067 case IPL_TYPE_CCW:
1068 reipl_block_actual = reipl_block_ccw;
1069 break;
1070 case IPL_TYPE_FCP:
1071 reipl_block_actual = reipl_block_fcp;
1072 break;
1073 case IPL_TYPE_NVME:
1074 reipl_block_actual = reipl_block_nvme;
1075 break;
1076 case IPL_TYPE_NSS:
1077 reipl_block_actual = reipl_block_nss;
1078 break;
1079 default:
1080 break;
1081 }
1082 reipl_type = type;
1083 return 0;
1084}
1085
1086static ssize_t reipl_type_show(struct kobject *kobj,
1087 struct kobj_attribute *attr, char *page)
1088{
1089 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1090}
1091
1092static ssize_t reipl_type_store(struct kobject *kobj,
1093 struct kobj_attribute *attr,
1094 const char *buf, size_t len)
1095{
1096 int rc = -EINVAL;
1097
1098 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1099 rc = reipl_set_type(IPL_TYPE_CCW);
1100 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1101 rc = reipl_set_type(IPL_TYPE_FCP);
1102 else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0)
1103 rc = reipl_set_type(IPL_TYPE_NVME);
1104 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1105 rc = reipl_set_type(IPL_TYPE_NSS);
1106 return (rc != 0) ? rc : len;
1107}
1108
1109static struct kobj_attribute reipl_type_attr =
1110 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1111
1112static struct kset *reipl_kset;
1113static struct kset *reipl_fcp_kset;
1114static struct kset *reipl_nvme_kset;
1115
1116static void __reipl_run(void *unused)
1117{
1118 switch (reipl_type) {
1119 case IPL_TYPE_CCW:
1120 diag308(DIAG308_SET, reipl_block_ccw);
1121 if (reipl_ccw_clear)
1122 diag308(DIAG308_LOAD_CLEAR, NULL);
1123 else
1124 diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
1125 break;
1126 case IPL_TYPE_FCP:
1127 diag308(DIAG308_SET, reipl_block_fcp);
1128 if (reipl_fcp_clear)
1129 diag308(DIAG308_LOAD_CLEAR, NULL);
1130 else
1131 diag308(DIAG308_LOAD_NORMAL, NULL);
1132 break;
1133 case IPL_TYPE_NVME:
1134 diag308(DIAG308_SET, reipl_block_nvme);
1135 if (reipl_nvme_clear)
1136 diag308(DIAG308_LOAD_CLEAR, NULL);
1137 else
1138 diag308(DIAG308_LOAD_NORMAL, NULL);
1139 break;
1140 case IPL_TYPE_NSS:
1141 diag308(DIAG308_SET, reipl_block_nss);
1142 diag308(DIAG308_LOAD_CLEAR, NULL);
1143 break;
1144 case IPL_TYPE_UNKNOWN:
1145 diag308(DIAG308_LOAD_CLEAR, NULL);
1146 break;
1147 case IPL_TYPE_FCP_DUMP:
1148 case IPL_TYPE_NVME_DUMP:
1149 break;
1150 }
1151 disabled_wait();
1152}
1153
1154static void reipl_run(struct shutdown_trigger *trigger)
1155{
1156 smp_call_ipl_cpu(__reipl_run, NULL);
1157}
1158
1159static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1160{
1161 ipb->hdr.len = IPL_BP_CCW_LEN;
1162 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1163 ipb->pb0_hdr.len = IPL_BP0_CCW_LEN;
1164 ipb->pb0_hdr.pbt = IPL_PBT_CCW;
1165}
1166
1167static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1168{
1169 /* LOADPARM */
1170 /* check if read scp info worked and set loadparm */
1171 if (sclp_ipl_info.is_valid)
1172 memcpy(ipb->ccw.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1173 else
1174 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1175 memset(ipb->ccw.loadparm, 0x40, LOADPARM_LEN);
1176 ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM;
1177
1178 /* VM PARM */
1179 if (MACHINE_IS_VM && ipl_block_valid &&
1180 (ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) {
1181
1182 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
1183 ipb->ccw.vm_parm_len = ipl_block.ccw.vm_parm_len;
1184 memcpy(ipb->ccw.vm_parm,
1185 ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1186 }
1187}
1188
1189static int __init reipl_nss_init(void)
1190{
1191 int rc;
1192
1193 if (!MACHINE_IS_VM)
1194 return 0;
1195
1196 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1197 if (!reipl_block_nss)
1198 return -ENOMEM;
1199
1200 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1201 if (rc)
1202 return rc;
1203
1204 reipl_block_ccw_init(reipl_block_nss);
1205 reipl_capabilities |= IPL_TYPE_NSS;
1206 return 0;
1207}
1208
1209static int __init reipl_ccw_init(void)
1210{
1211 int rc;
1212
1213 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1214 if (!reipl_block_ccw)
1215 return -ENOMEM;
1216
1217 rc = sysfs_create_group(&reipl_kset->kobj,
1218 MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
1219 : &reipl_ccw_attr_group_lpar);
1220 if (rc)
1221 return rc;
1222
1223 reipl_block_ccw_init(reipl_block_ccw);
1224 if (ipl_info.type == IPL_TYPE_CCW) {
1225 reipl_block_ccw->ccw.ssid = ipl_block.ccw.ssid;
1226 reipl_block_ccw->ccw.devno = ipl_block.ccw.devno;
1227 reipl_block_ccw_fill_parms(reipl_block_ccw);
1228 }
1229
1230 reipl_capabilities |= IPL_TYPE_CCW;
1231 return 0;
1232}
1233
1234static int __init reipl_fcp_init(void)
1235{
1236 int rc;
1237
1238 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1239 if (!reipl_block_fcp)
1240 return -ENOMEM;
1241
1242 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1243 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1244 &reipl_kset->kobj);
1245 if (!reipl_fcp_kset) {
1246 free_page((unsigned long) reipl_block_fcp);
1247 return -ENOMEM;
1248 }
1249
1250 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1251 if (rc)
1252 goto out1;
1253
1254 if (test_facility(141)) {
1255 rc = sysfs_create_file(&reipl_fcp_kset->kobj,
1256 &sys_reipl_fcp_clear_attr.attr);
1257 if (rc)
1258 goto out2;
1259 } else {
1260 reipl_fcp_clear = true;
1261 }
1262
1263 if (ipl_info.type == IPL_TYPE_FCP) {
1264 memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
1265 /*
1266 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1267 * is invalid in the SCSI IPL parameter block, so take it
1268 * always from sclp_ipl_info.
1269 */
1270 memcpy(reipl_block_fcp->fcp.loadparm, sclp_ipl_info.loadparm,
1271 LOADPARM_LEN);
1272 } else {
1273 reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1274 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1275 reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1276 reipl_block_fcp->fcp.pbt = IPL_PBT_FCP;
1277 reipl_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_IPL;
1278 }
1279 reipl_capabilities |= IPL_TYPE_FCP;
1280 return 0;
1281
1282out2:
1283 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1284out1:
1285 kset_unregister(reipl_fcp_kset);
1286 free_page((unsigned long) reipl_block_fcp);
1287 return rc;
1288}
1289
1290static int __init reipl_nvme_init(void)
1291{
1292 int rc;
1293
1294 reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
1295 if (!reipl_block_nvme)
1296 return -ENOMEM;
1297
1298 /* sysfs: create kset for mixing attr group and bin attrs */
1299 reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL,
1300 &reipl_kset->kobj);
1301 if (!reipl_nvme_kset) {
1302 free_page((unsigned long) reipl_block_nvme);
1303 return -ENOMEM;
1304 }
1305
1306 rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
1307 if (rc)
1308 goto out1;
1309
1310 if (test_facility(141)) {
1311 rc = sysfs_create_file(&reipl_nvme_kset->kobj,
1312 &sys_reipl_nvme_clear_attr.attr);
1313 if (rc)
1314 goto out2;
1315 } else {
1316 reipl_nvme_clear = true;
1317 }
1318
1319 if (ipl_info.type == IPL_TYPE_NVME) {
1320 memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block));
1321 /*
1322 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1323 * is invalid in the IPL parameter block, so take it
1324 * always from sclp_ipl_info.
1325 */
1326 memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm,
1327 LOADPARM_LEN);
1328 } else {
1329 reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN;
1330 reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
1331 reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN;
1332 reipl_block_nvme->nvme.pbt = IPL_PBT_NVME;
1333 reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL;
1334 }
1335 reipl_capabilities |= IPL_TYPE_NVME;
1336 return 0;
1337
1338out2:
1339 sysfs_remove_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
1340out1:
1341 kset_unregister(reipl_nvme_kset);
1342 free_page((unsigned long) reipl_block_nvme);
1343 return rc;
1344}
1345
1346static int __init reipl_type_init(void)
1347{
1348 enum ipl_type reipl_type = ipl_info.type;
1349 struct ipl_parameter_block *reipl_block;
1350 unsigned long size;
1351
1352 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1353 if (!reipl_block)
1354 goto out;
1355 /*
1356 * If we have an OS info reipl block, this will be used
1357 */
1358 if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) {
1359 memcpy(reipl_block_fcp, reipl_block, size);
1360 reipl_type = IPL_TYPE_FCP;
1361 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) {
1362 memcpy(reipl_block_nvme, reipl_block, size);
1363 reipl_type = IPL_TYPE_NVME;
1364 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) {
1365 memcpy(reipl_block_ccw, reipl_block, size);
1366 reipl_type = IPL_TYPE_CCW;
1367 }
1368out:
1369 return reipl_set_type(reipl_type);
1370}
1371
1372static int __init reipl_init(void)
1373{
1374 int rc;
1375
1376 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1377 if (!reipl_kset)
1378 return -ENOMEM;
1379 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1380 if (rc) {
1381 kset_unregister(reipl_kset);
1382 return rc;
1383 }
1384 rc = reipl_ccw_init();
1385 if (rc)
1386 return rc;
1387 rc = reipl_fcp_init();
1388 if (rc)
1389 return rc;
1390 rc = reipl_nvme_init();
1391 if (rc)
1392 return rc;
1393 rc = reipl_nss_init();
1394 if (rc)
1395 return rc;
1396 return reipl_type_init();
1397}
1398
1399static struct shutdown_action __refdata reipl_action = {
1400 .name = SHUTDOWN_ACTION_REIPL_STR,
1401 .fn = reipl_run,
1402 .init = reipl_init,
1403};
1404
1405/*
1406 * dump shutdown action: Dump Linux on shutdown.
1407 */
1408
1409/* FCP dump device attributes */
1410
1411DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1412 dump_block_fcp->fcp.wwpn);
1413DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1414 dump_block_fcp->fcp.lun);
1415DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1416 dump_block_fcp->fcp.bootprog);
1417DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1418 dump_block_fcp->fcp.br_lba);
1419DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1420 dump_block_fcp->fcp.devno);
1421
1422static struct attribute *dump_fcp_attrs[] = {
1423 &sys_dump_fcp_device_attr.attr,
1424 &sys_dump_fcp_wwpn_attr.attr,
1425 &sys_dump_fcp_lun_attr.attr,
1426 &sys_dump_fcp_bootprog_attr.attr,
1427 &sys_dump_fcp_br_lba_attr.attr,
1428 NULL,
1429};
1430
1431static struct attribute_group dump_fcp_attr_group = {
1432 .name = IPL_FCP_STR,
1433 .attrs = dump_fcp_attrs,
1434};
1435
1436/* NVME dump device attributes */
1437DEFINE_IPL_ATTR_RW(dump_nvme, fid, "0x%08llx\n", "%llx\n",
1438 dump_block_nvme->nvme.fid);
1439DEFINE_IPL_ATTR_RW(dump_nvme, nsid, "0x%08llx\n", "%llx\n",
1440 dump_block_nvme->nvme.nsid);
1441DEFINE_IPL_ATTR_RW(dump_nvme, bootprog, "%lld\n", "%llx\n",
1442 dump_block_nvme->nvme.bootprog);
1443DEFINE_IPL_ATTR_RW(dump_nvme, br_lba, "%lld\n", "%llx\n",
1444 dump_block_nvme->nvme.br_lba);
1445
1446static struct attribute *dump_nvme_attrs[] = {
1447 &sys_dump_nvme_fid_attr.attr,
1448 &sys_dump_nvme_nsid_attr.attr,
1449 &sys_dump_nvme_bootprog_attr.attr,
1450 &sys_dump_nvme_br_lba_attr.attr,
1451 NULL,
1452};
1453
1454static struct attribute_group dump_nvme_attr_group = {
1455 .name = IPL_NVME_STR,
1456 .attrs = dump_nvme_attrs,
1457};
1458
1459/* CCW dump device attributes */
1460DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw);
1461
1462static struct attribute *dump_ccw_attrs[] = {
1463 &sys_dump_ccw_device_attr.attr,
1464 NULL,
1465};
1466
1467static struct attribute_group dump_ccw_attr_group = {
1468 .name = IPL_CCW_STR,
1469 .attrs = dump_ccw_attrs,
1470};
1471
1472/* dump type */
1473
1474static int dump_set_type(enum dump_type type)
1475{
1476 if (!(dump_capabilities & type))
1477 return -EINVAL;
1478 dump_type = type;
1479 return 0;
1480}
1481
1482static ssize_t dump_type_show(struct kobject *kobj,
1483 struct kobj_attribute *attr, char *page)
1484{
1485 return sprintf(page, "%s\n", dump_type_str(dump_type));
1486}
1487
1488static ssize_t dump_type_store(struct kobject *kobj,
1489 struct kobj_attribute *attr,
1490 const char *buf, size_t len)
1491{
1492 int rc = -EINVAL;
1493
1494 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1495 rc = dump_set_type(DUMP_TYPE_NONE);
1496 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1497 rc = dump_set_type(DUMP_TYPE_CCW);
1498 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1499 rc = dump_set_type(DUMP_TYPE_FCP);
1500 else if (strncmp(buf, DUMP_NVME_STR, strlen(DUMP_NVME_STR)) == 0)
1501 rc = dump_set_type(DUMP_TYPE_NVME);
1502 return (rc != 0) ? rc : len;
1503}
1504
1505static struct kobj_attribute dump_type_attr =
1506 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1507
1508static struct kset *dump_kset;
1509
1510static void diag308_dump(void *dump_block)
1511{
1512 diag308(DIAG308_SET, dump_block);
1513 while (1) {
1514 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1515 break;
1516 udelay(USEC_PER_SEC);
1517 }
1518}
1519
1520static void __dump_run(void *unused)
1521{
1522 switch (dump_type) {
1523 case DUMP_TYPE_CCW:
1524 diag308_dump(dump_block_ccw);
1525 break;
1526 case DUMP_TYPE_FCP:
1527 diag308_dump(dump_block_fcp);
1528 break;
1529 case DUMP_TYPE_NVME:
1530 diag308_dump(dump_block_nvme);
1531 break;
1532 default:
1533 break;
1534 }
1535}
1536
1537static void dump_run(struct shutdown_trigger *trigger)
1538{
1539 if (dump_type == DUMP_TYPE_NONE)
1540 return;
1541 smp_send_stop();
1542 smp_call_ipl_cpu(__dump_run, NULL);
1543}
1544
1545static int __init dump_ccw_init(void)
1546{
1547 int rc;
1548
1549 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1550 if (!dump_block_ccw)
1551 return -ENOMEM;
1552 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1553 if (rc) {
1554 free_page((unsigned long)dump_block_ccw);
1555 return rc;
1556 }
1557 dump_block_ccw->hdr.len = IPL_BP_CCW_LEN;
1558 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1559 dump_block_ccw->ccw.len = IPL_BP0_CCW_LEN;
1560 dump_block_ccw->ccw.pbt = IPL_PBT_CCW;
1561 dump_capabilities |= DUMP_TYPE_CCW;
1562 return 0;
1563}
1564
1565static int __init dump_fcp_init(void)
1566{
1567 int rc;
1568
1569 if (!sclp_ipl_info.has_dump)
1570 return 0; /* LDIPL DUMP is not installed */
1571 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1572 if (!dump_block_fcp)
1573 return -ENOMEM;
1574 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1575 if (rc) {
1576 free_page((unsigned long)dump_block_fcp);
1577 return rc;
1578 }
1579 dump_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1580 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1581 dump_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1582 dump_block_fcp->fcp.pbt = IPL_PBT_FCP;
1583 dump_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_DUMP;
1584 dump_capabilities |= DUMP_TYPE_FCP;
1585 return 0;
1586}
1587
1588static int __init dump_nvme_init(void)
1589{
1590 int rc;
1591
1592 if (!sclp_ipl_info.has_dump)
1593 return 0; /* LDIPL DUMP is not installed */
1594 dump_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
1595 if (!dump_block_nvme)
1596 return -ENOMEM;
1597 rc = sysfs_create_group(&dump_kset->kobj, &dump_nvme_attr_group);
1598 if (rc) {
1599 free_page((unsigned long)dump_block_nvme);
1600 return rc;
1601 }
1602 dump_block_nvme->hdr.len = IPL_BP_NVME_LEN;
1603 dump_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
1604 dump_block_nvme->fcp.len = IPL_BP0_NVME_LEN;
1605 dump_block_nvme->fcp.pbt = IPL_PBT_NVME;
1606 dump_block_nvme->fcp.opt = IPL_PB0_NVME_OPT_DUMP;
1607 dump_capabilities |= DUMP_TYPE_NVME;
1608 return 0;
1609}
1610
1611static int __init dump_init(void)
1612{
1613 int rc;
1614
1615 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1616 if (!dump_kset)
1617 return -ENOMEM;
1618 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1619 if (rc) {
1620 kset_unregister(dump_kset);
1621 return rc;
1622 }
1623 rc = dump_ccw_init();
1624 if (rc)
1625 return rc;
1626 rc = dump_fcp_init();
1627 if (rc)
1628 return rc;
1629 rc = dump_nvme_init();
1630 if (rc)
1631 return rc;
1632 dump_set_type(DUMP_TYPE_NONE);
1633 return 0;
1634}
1635
1636static struct shutdown_action __refdata dump_action = {
1637 .name = SHUTDOWN_ACTION_DUMP_STR,
1638 .fn = dump_run,
1639 .init = dump_init,
1640};
1641
1642static void dump_reipl_run(struct shutdown_trigger *trigger)
1643{
1644 unsigned long ipib = (unsigned long) reipl_block_actual;
1645 unsigned int csum;
1646
1647 csum = (__force unsigned int)
1648 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1649 mem_assign_absolute(S390_lowcore.ipib, ipib);
1650 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1651 dump_run(trigger);
1652}
1653
1654static struct shutdown_action __refdata dump_reipl_action = {
1655 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1656 .fn = dump_reipl_run,
1657};
1658
1659/*
1660 * vmcmd shutdown action: Trigger vm command on shutdown.
1661 */
1662
1663static char vmcmd_on_reboot[128];
1664static char vmcmd_on_panic[128];
1665static char vmcmd_on_halt[128];
1666static char vmcmd_on_poff[128];
1667static char vmcmd_on_restart[128];
1668
1669DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1670DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1671DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1672DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1673DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1674
1675static struct attribute *vmcmd_attrs[] = {
1676 &sys_vmcmd_on_reboot_attr.attr,
1677 &sys_vmcmd_on_panic_attr.attr,
1678 &sys_vmcmd_on_halt_attr.attr,
1679 &sys_vmcmd_on_poff_attr.attr,
1680 &sys_vmcmd_on_restart_attr.attr,
1681 NULL,
1682};
1683
1684static struct attribute_group vmcmd_attr_group = {
1685 .attrs = vmcmd_attrs,
1686};
1687
1688static struct kset *vmcmd_kset;
1689
1690static void vmcmd_run(struct shutdown_trigger *trigger)
1691{
1692 char *cmd;
1693
1694 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1695 cmd = vmcmd_on_reboot;
1696 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1697 cmd = vmcmd_on_panic;
1698 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1699 cmd = vmcmd_on_halt;
1700 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1701 cmd = vmcmd_on_poff;
1702 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1703 cmd = vmcmd_on_restart;
1704 else
1705 return;
1706
1707 if (strlen(cmd) == 0)
1708 return;
1709 __cpcmd(cmd, NULL, 0, NULL);
1710}
1711
1712static int vmcmd_init(void)
1713{
1714 if (!MACHINE_IS_VM)
1715 return -EOPNOTSUPP;
1716 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1717 if (!vmcmd_kset)
1718 return -ENOMEM;
1719 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1720}
1721
1722static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1723 vmcmd_run, vmcmd_init};
1724
1725/*
1726 * stop shutdown action: Stop Linux on shutdown.
1727 */
1728
1729static void stop_run(struct shutdown_trigger *trigger)
1730{
1731 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1732 strcmp(trigger->name, ON_RESTART_STR) == 0)
1733 disabled_wait();
1734 smp_stop_cpu();
1735}
1736
1737static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1738 stop_run, NULL};
1739
1740/* action list */
1741
1742static struct shutdown_action *shutdown_actions_list[] = {
1743 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1744 &vmcmd_action, &stop_action};
1745#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1746
1747/*
1748 * Trigger section
1749 */
1750
1751static struct kset *shutdown_actions_kset;
1752
1753static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1754 size_t len)
1755{
1756 int i;
1757
1758 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1759 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1760 if (shutdown_actions_list[i]->init_rc) {
1761 return shutdown_actions_list[i]->init_rc;
1762 } else {
1763 trigger->action = shutdown_actions_list[i];
1764 return len;
1765 }
1766 }
1767 }
1768 return -EINVAL;
1769}
1770
1771/* on reipl */
1772
1773static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1774 &reipl_action};
1775
1776static ssize_t on_reboot_show(struct kobject *kobj,
1777 struct kobj_attribute *attr, char *page)
1778{
1779 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1780}
1781
1782static ssize_t on_reboot_store(struct kobject *kobj,
1783 struct kobj_attribute *attr,
1784 const char *buf, size_t len)
1785{
1786 return set_trigger(buf, &on_reboot_trigger, len);
1787}
1788static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1789
1790static void do_machine_restart(char *__unused)
1791{
1792 smp_send_stop();
1793 on_reboot_trigger.action->fn(&on_reboot_trigger);
1794 reipl_run(NULL);
1795}
1796void (*_machine_restart)(char *command) = do_machine_restart;
1797
1798/* on panic */
1799
1800static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1801
1802static ssize_t on_panic_show(struct kobject *kobj,
1803 struct kobj_attribute *attr, char *page)
1804{
1805 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1806}
1807
1808static ssize_t on_panic_store(struct kobject *kobj,
1809 struct kobj_attribute *attr,
1810 const char *buf, size_t len)
1811{
1812 return set_trigger(buf, &on_panic_trigger, len);
1813}
1814static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1815
1816static void do_panic(void)
1817{
1818 lgr_info_log();
1819 on_panic_trigger.action->fn(&on_panic_trigger);
1820 stop_run(&on_panic_trigger);
1821}
1822
1823/* on restart */
1824
1825static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1826 &stop_action};
1827
1828static ssize_t on_restart_show(struct kobject *kobj,
1829 struct kobj_attribute *attr, char *page)
1830{
1831 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1832}
1833
1834static ssize_t on_restart_store(struct kobject *kobj,
1835 struct kobj_attribute *attr,
1836 const char *buf, size_t len)
1837{
1838 return set_trigger(buf, &on_restart_trigger, len);
1839}
1840static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1841
1842static void __do_restart(void *ignore)
1843{
1844 smp_send_stop();
1845#ifdef CONFIG_CRASH_DUMP
1846 crash_kexec(NULL);
1847#endif
1848 on_restart_trigger.action->fn(&on_restart_trigger);
1849 stop_run(&on_restart_trigger);
1850}
1851
1852void do_restart(void *arg)
1853{
1854 tracing_off();
1855 debug_locks_off();
1856 lgr_info_log();
1857 smp_call_online_cpu(__do_restart, arg);
1858}
1859
1860/* on halt */
1861
1862static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1863
1864static ssize_t on_halt_show(struct kobject *kobj,
1865 struct kobj_attribute *attr, char *page)
1866{
1867 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1868}
1869
1870static ssize_t on_halt_store(struct kobject *kobj,
1871 struct kobj_attribute *attr,
1872 const char *buf, size_t len)
1873{
1874 return set_trigger(buf, &on_halt_trigger, len);
1875}
1876static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1877
1878static void do_machine_halt(void)
1879{
1880 smp_send_stop();
1881 on_halt_trigger.action->fn(&on_halt_trigger);
1882 stop_run(&on_halt_trigger);
1883}
1884void (*_machine_halt)(void) = do_machine_halt;
1885
1886/* on power off */
1887
1888static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1889
1890static ssize_t on_poff_show(struct kobject *kobj,
1891 struct kobj_attribute *attr, char *page)
1892{
1893 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1894}
1895
1896static ssize_t on_poff_store(struct kobject *kobj,
1897 struct kobj_attribute *attr,
1898 const char *buf, size_t len)
1899{
1900 return set_trigger(buf, &on_poff_trigger, len);
1901}
1902static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1903
1904static void do_machine_power_off(void)
1905{
1906 smp_send_stop();
1907 on_poff_trigger.action->fn(&on_poff_trigger);
1908 stop_run(&on_poff_trigger);
1909}
1910void (*_machine_power_off)(void) = do_machine_power_off;
1911
1912static struct attribute *shutdown_action_attrs[] = {
1913 &on_restart_attr.attr,
1914 &on_reboot_attr.attr,
1915 &on_panic_attr.attr,
1916 &on_halt_attr.attr,
1917 &on_poff_attr.attr,
1918 NULL,
1919};
1920
1921static struct attribute_group shutdown_action_attr_group = {
1922 .attrs = shutdown_action_attrs,
1923};
1924
1925static void __init shutdown_triggers_init(void)
1926{
1927 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1928 firmware_kobj);
1929 if (!shutdown_actions_kset)
1930 goto fail;
1931 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1932 &shutdown_action_attr_group))
1933 goto fail;
1934 return;
1935fail:
1936 panic("shutdown_triggers_init failed\n");
1937}
1938
1939static void __init shutdown_actions_init(void)
1940{
1941 int i;
1942
1943 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1944 if (!shutdown_actions_list[i]->init)
1945 continue;
1946 shutdown_actions_list[i]->init_rc =
1947 shutdown_actions_list[i]->init();
1948 }
1949}
1950
1951static int __init s390_ipl_init(void)
1952{
1953 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1954
1955 sclp_early_get_ipl_info(&sclp_ipl_info);
1956 /*
1957 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1958 * returned by read SCP info is invalid (contains EBCDIC blanks)
1959 * when the system has been booted via diag308. In that case we use
1960 * the value from diag308, if available.
1961 *
1962 * There are also systems where diag308 store does not work in
1963 * case the system is booted from HMC. Fortunately in this case
1964 * READ SCP info provides the correct value.
1965 */
1966 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
1967 memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN);
1968 shutdown_actions_init();
1969 shutdown_triggers_init();
1970 return 0;
1971}
1972
1973__initcall(s390_ipl_init);
1974
1975static void __init strncpy_skip_quote(char *dst, char *src, int n)
1976{
1977 int sx, dx;
1978
1979 dx = 0;
1980 for (sx = 0; src[sx] != 0; sx++) {
1981 if (src[sx] == '"')
1982 continue;
1983 dst[dx++] = src[sx];
1984 if (dx >= n)
1985 break;
1986 }
1987}
1988
1989static int __init vmcmd_on_reboot_setup(char *str)
1990{
1991 if (!MACHINE_IS_VM)
1992 return 1;
1993 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1994 vmcmd_on_reboot[127] = 0;
1995 on_reboot_trigger.action = &vmcmd_action;
1996 return 1;
1997}
1998__setup("vmreboot=", vmcmd_on_reboot_setup);
1999
2000static int __init vmcmd_on_panic_setup(char *str)
2001{
2002 if (!MACHINE_IS_VM)
2003 return 1;
2004 strncpy_skip_quote(vmcmd_on_panic, str, 127);
2005 vmcmd_on_panic[127] = 0;
2006 on_panic_trigger.action = &vmcmd_action;
2007 return 1;
2008}
2009__setup("vmpanic=", vmcmd_on_panic_setup);
2010
2011static int __init vmcmd_on_halt_setup(char *str)
2012{
2013 if (!MACHINE_IS_VM)
2014 return 1;
2015 strncpy_skip_quote(vmcmd_on_halt, str, 127);
2016 vmcmd_on_halt[127] = 0;
2017 on_halt_trigger.action = &vmcmd_action;
2018 return 1;
2019}
2020__setup("vmhalt=", vmcmd_on_halt_setup);
2021
2022static int __init vmcmd_on_poff_setup(char *str)
2023{
2024 if (!MACHINE_IS_VM)
2025 return 1;
2026 strncpy_skip_quote(vmcmd_on_poff, str, 127);
2027 vmcmd_on_poff[127] = 0;
2028 on_poff_trigger.action = &vmcmd_action;
2029 return 1;
2030}
2031__setup("vmpoff=", vmcmd_on_poff_setup);
2032
2033static int on_panic_notify(struct notifier_block *self,
2034 unsigned long event, void *data)
2035{
2036 do_panic();
2037 return NOTIFY_OK;
2038}
2039
2040static struct notifier_block on_panic_nb = {
2041 .notifier_call = on_panic_notify,
2042 .priority = INT_MIN,
2043};
2044
2045void __init setup_ipl(void)
2046{
2047 BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
2048
2049 ipl_info.type = get_ipl_type();
2050 switch (ipl_info.type) {
2051 case IPL_TYPE_CCW:
2052 ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid;
2053 ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno;
2054 break;
2055 case IPL_TYPE_FCP:
2056 case IPL_TYPE_FCP_DUMP:
2057 ipl_info.data.fcp.dev_id.ssid = 0;
2058 ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno;
2059 ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn;
2060 ipl_info.data.fcp.lun = ipl_block.fcp.lun;
2061 break;
2062 case IPL_TYPE_NVME:
2063 case IPL_TYPE_NVME_DUMP:
2064 ipl_info.data.nvme.fid = ipl_block.nvme.fid;
2065 ipl_info.data.nvme.nsid = ipl_block.nvme.nsid;
2066 break;
2067 case IPL_TYPE_NSS:
2068 case IPL_TYPE_UNKNOWN:
2069 /* We have no info to copy */
2070 break;
2071 }
2072 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
2073}
2074
2075void s390_reset_system(void)
2076{
2077 /* Disable prefixing */
2078 set_prefix(0);
2079
2080 /* Disable lowcore protection */
2081 __ctl_clear_bit(0, 28);
2082 diag_dma_ops.diag308_reset();
2083}
2084
2085#ifdef CONFIG_KEXEC_FILE
2086
2087int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
2088 unsigned char flags, unsigned short cert)
2089{
2090 struct ipl_report_component *comp;
2091
2092 comp = vzalloc(sizeof(*comp));
2093 if (!comp)
2094 return -ENOMEM;
2095 list_add_tail(&comp->list, &report->components);
2096
2097 comp->entry.addr = kbuf->mem;
2098 comp->entry.len = kbuf->memsz;
2099 comp->entry.flags = flags;
2100 comp->entry.certificate_index = cert;
2101
2102 report->size += sizeof(comp->entry);
2103
2104 return 0;
2105}
2106
2107int ipl_report_add_certificate(struct ipl_report *report, void *key,
2108 unsigned long addr, unsigned long len)
2109{
2110 struct ipl_report_certificate *cert;
2111
2112 cert = vzalloc(sizeof(*cert));
2113 if (!cert)
2114 return -ENOMEM;
2115 list_add_tail(&cert->list, &report->certificates);
2116
2117 cert->entry.addr = addr;
2118 cert->entry.len = len;
2119 cert->key = key;
2120
2121 report->size += sizeof(cert->entry);
2122 report->size += cert->entry.len;
2123
2124 return 0;
2125}
2126
2127struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib)
2128{
2129 struct ipl_report *report;
2130
2131 report = vzalloc(sizeof(*report));
2132 if (!report)
2133 return ERR_PTR(-ENOMEM);
2134
2135 report->ipib = ipib;
2136 INIT_LIST_HEAD(&report->components);
2137 INIT_LIST_HEAD(&report->certificates);
2138
2139 report->size = ALIGN(ipib->hdr.len, 8);
2140 report->size += sizeof(struct ipl_rl_hdr);
2141 report->size += sizeof(struct ipl_rb_components);
2142 report->size += sizeof(struct ipl_rb_certificates);
2143
2144 return report;
2145}
2146
2147void *ipl_report_finish(struct ipl_report *report)
2148{
2149 struct ipl_report_certificate *cert;
2150 struct ipl_report_component *comp;
2151 struct ipl_rb_certificates *certs;
2152 struct ipl_parameter_block *ipib;
2153 struct ipl_rb_components *comps;
2154 struct ipl_rl_hdr *rl_hdr;
2155 void *buf, *ptr;
2156
2157 buf = vzalloc(report->size);
2158 if (!buf)
2159 return ERR_PTR(-ENOMEM);
2160 ptr = buf;
2161
2162 memcpy(ptr, report->ipib, report->ipib->hdr.len);
2163 ipib = ptr;
2164 if (ipl_secure_flag)
2165 ipib->hdr.flags |= IPL_PL_FLAG_SIPL;
2166 ipib->hdr.flags |= IPL_PL_FLAG_IPLSR;
2167 ptr += report->ipib->hdr.len;
2168 ptr = PTR_ALIGN(ptr, 8);
2169
2170 rl_hdr = ptr;
2171 ptr += sizeof(*rl_hdr);
2172
2173 comps = ptr;
2174 comps->rbt = IPL_RBT_COMPONENTS;
2175 ptr += sizeof(*comps);
2176 list_for_each_entry(comp, &report->components, list) {
2177 memcpy(ptr, &comp->entry, sizeof(comp->entry));
2178 ptr += sizeof(comp->entry);
2179 }
2180 comps->len = ptr - (void *)comps;
2181
2182 certs = ptr;
2183 certs->rbt = IPL_RBT_CERTIFICATES;
2184 ptr += sizeof(*certs);
2185 list_for_each_entry(cert, &report->certificates, list) {
2186 memcpy(ptr, &cert->entry, sizeof(cert->entry));
2187 ptr += sizeof(cert->entry);
2188 }
2189 certs->len = ptr - (void *)certs;
2190 rl_hdr->len = ptr - (void *)rl_hdr;
2191
2192 list_for_each_entry(cert, &report->certificates, list) {
2193 memcpy(ptr, cert->key, cert->entry.len);
2194 ptr += cert->entry.len;
2195 }
2196
2197 BUG_ON(ptr > buf + report->size);
2198 return buf;
2199}
2200
2201int ipl_report_free(struct ipl_report *report)
2202{
2203 struct ipl_report_component *comp, *ncomp;
2204 struct ipl_report_certificate *cert, *ncert;
2205
2206 list_for_each_entry_safe(comp, ncomp, &report->components, list)
2207 vfree(comp);
2208
2209 list_for_each_entry_safe(cert, ncert, &report->certificates, list)
2210 vfree(cert);
2211
2212 vfree(report);
2213
2214 return 0;
2215}
2216
2217#endif