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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / arch / s390 / kernel / ipl.c
blob6837affc19e8185cef726000b5eca49971a1c1d5
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 <asm/sections.h>
33 #include <asm/boot_data.h>
34 #include "entry.h"
35
36 #define IPL_PARM_BLOCK_VERSION 0
37
38 #define IPL_UNKNOWN_STR "unknown"
39 #define IPL_CCW_STR "ccw"
40 #define IPL_FCP_STR "fcp"
41 #define IPL_FCP_DUMP_STR "fcp_dump"
42 #define IPL_NSS_STR "nss"
43
44 #define DUMP_CCW_STR "ccw"
45 #define DUMP_FCP_STR "fcp"
46 #define DUMP_NONE_STR "none"
47
48 /*
49 * Four shutdown trigger types are supported:
50 * - panic
51 * - halt
52 * - power off
53 * - reipl
54 * - restart
55 */
56 #define ON_PANIC_STR "on_panic"
57 #define ON_HALT_STR "on_halt"
58 #define ON_POFF_STR "on_poff"
59 #define ON_REIPL_STR "on_reboot"
60 #define ON_RESTART_STR "on_restart"
61
62 struct shutdown_action;
63 struct shutdown_trigger {
64 char *name;
65 struct shutdown_action *action;
66 };
67
68 /*
69 * The following shutdown action types are supported:
70 */
71 #define SHUTDOWN_ACTION_IPL_STR "ipl"
72 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
73 #define SHUTDOWN_ACTION_DUMP_STR "dump"
74 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
75 #define SHUTDOWN_ACTION_STOP_STR "stop"
76 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
77
78 struct shutdown_action {
79 char *name;
80 void (*fn) (struct shutdown_trigger *trigger);
81 int (*init) (void);
82 int init_rc;
83 };
84
85 static char *ipl_type_str(enum ipl_type type)
86 {
87 switch (type) {
88 case IPL_TYPE_CCW:
89 return IPL_CCW_STR;
90 case IPL_TYPE_FCP:
91 return IPL_FCP_STR;
92 case IPL_TYPE_FCP_DUMP:
93 return IPL_FCP_DUMP_STR;
94 case IPL_TYPE_NSS:
95 return IPL_NSS_STR;
96 case IPL_TYPE_UNKNOWN:
97 default:
98 return IPL_UNKNOWN_STR;
99 }
100 }
101
102 enum dump_type {
103 DUMP_TYPE_NONE = 1,
104 DUMP_TYPE_CCW = 2,
105 DUMP_TYPE_FCP = 4,
106 };
107
108 static char *dump_type_str(enum dump_type type)
109 {
110 switch (type) {
111 case DUMP_TYPE_NONE:
112 return DUMP_NONE_STR;
113 case DUMP_TYPE_CCW:
114 return DUMP_CCW_STR;
115 case DUMP_TYPE_FCP:
116 return DUMP_FCP_STR;
117 default:
118 return NULL;
119 }
120 }
121
122 int __bootdata_preserved(ipl_block_valid);
123 struct ipl_parameter_block __bootdata_preserved(ipl_block);
124 int __bootdata_preserved(ipl_secure_flag);
125
126 unsigned long __bootdata_preserved(ipl_cert_list_addr);
127 unsigned long __bootdata_preserved(ipl_cert_list_size);
128
129 unsigned long __bootdata(early_ipl_comp_list_addr);
130 unsigned long __bootdata(early_ipl_comp_list_size);
131
132 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
133
134 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
135 static struct ipl_parameter_block *reipl_block_fcp;
136 static struct ipl_parameter_block *reipl_block_ccw;
137 static struct ipl_parameter_block *reipl_block_nss;
138 static struct ipl_parameter_block *reipl_block_actual;
139
140 static int dump_capabilities = DUMP_TYPE_NONE;
141 static enum dump_type dump_type = DUMP_TYPE_NONE;
142 static struct ipl_parameter_block *dump_block_fcp;
143 static struct ipl_parameter_block *dump_block_ccw;
144
145 static struct sclp_ipl_info sclp_ipl_info;
146
147 static inline int __diag308(unsigned long subcode, void *addr)
148 {
149 register unsigned long _addr asm("0") = (unsigned long) addr;
150 register unsigned long _rc asm("1") = 0;
151
152 asm volatile(
153 " diag %0,%2,0x308\n"
154 "0: nopr %%r7\n"
155 EX_TABLE(0b,0b)
156 : "+d" (_addr), "+d" (_rc)
157 : "d" (subcode) : "cc", "memory");
158 return _rc;
159 }
160
161 int diag308(unsigned long subcode, void *addr)
162 {
163 if (IS_ENABLED(CONFIG_KASAN))
164 __arch_local_irq_stosm(0x04); /* enable DAT */
165 diag_stat_inc(DIAG_STAT_X308);
166 return __diag308(subcode, addr);
167 }
168 EXPORT_SYMBOL_GPL(diag308);
169
170 /* SYSFS */
171
172 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
173 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
174 struct kobj_attribute *attr, \
175 char *page) \
176 { \
177 return snprintf(page, PAGE_SIZE, _format, ##args); \
178 }
179
180 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
181 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
182 struct kobj_attribute *attr, \
183 const char *buf, size_t len) \
184 { \
185 unsigned long long ssid, devno; \
186 \
187 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
188 return -EINVAL; \
189 \
190 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
191 return -EINVAL; \
192 \
193 _ipl_blk.ssid = ssid; \
194 _ipl_blk.devno = devno; \
195 return len; \
196 }
197
198 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
199 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
200 _ipl_blk.ssid, _ipl_blk.devno); \
201 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
202 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
203 __ATTR(_name, (S_IRUGO | S_IWUSR), \
204 sys_##_prefix##_##_name##_show, \
205 sys_##_prefix##_##_name##_store) \
206
207 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
208 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
209 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
210 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
211
212 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
213 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
214 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
215 struct kobj_attribute *attr, \
216 const char *buf, size_t len) \
217 { \
218 unsigned long long value; \
219 if (sscanf(buf, _fmt_in, &value) != 1) \
220 return -EINVAL; \
221 _value = value; \
222 return len; \
223 } \
224 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
225 __ATTR(_name,(S_IRUGO | S_IWUSR), \
226 sys_##_prefix##_##_name##_show, \
227 sys_##_prefix##_##_name##_store)
228
229 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
230 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
231 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
232 struct kobj_attribute *attr, \
233 const char *buf, size_t len) \
234 { \
235 strncpy(_value, buf, sizeof(_value) - 1); \
236 strim(_value); \
237 return len; \
238 } \
239 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
240 __ATTR(_name,(S_IRUGO | S_IWUSR), \
241 sys_##_prefix##_##_name##_show, \
242 sys_##_prefix##_##_name##_store)
243
244 /*
245 * ipl section
246 */
247
248 static __init enum ipl_type get_ipl_type(void)
249 {
250 if (!ipl_block_valid)
251 return IPL_TYPE_UNKNOWN;
252
253 switch (ipl_block.pb0_hdr.pbt) {
254 case IPL_PBT_CCW:
255 return IPL_TYPE_CCW;
256 case IPL_PBT_FCP:
257 if (ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP)
258 return IPL_TYPE_FCP_DUMP;
259 else
260 return IPL_TYPE_FCP;
261 }
262 return IPL_TYPE_UNKNOWN;
263 }
264
265 struct ipl_info ipl_info;
266 EXPORT_SYMBOL_GPL(ipl_info);
267
268 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
269 char *page)
270 {
271 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
272 }
273
274 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
275
276 static ssize_t ipl_secure_show(struct kobject *kobj,
277 struct kobj_attribute *attr, char *page)
278 {
279 return sprintf(page, "%i\n", !!ipl_secure_flag);
280 }
281
282 static struct kobj_attribute sys_ipl_secure_attr =
283 __ATTR(secure, 0444, ipl_secure_show, NULL);
284
285 static ssize_t ipl_has_secure_show(struct kobject *kobj,
286 struct kobj_attribute *attr, char *page)
287 {
288 return sprintf(page, "%i\n", !!sclp.has_sipl);
289 }
290
291 static struct kobj_attribute sys_ipl_has_secure_attr =
292 __ATTR(has_secure, 0444, ipl_has_secure_show, NULL);
293
294 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
295 struct kobj_attribute *attr, char *page)
296 {
297 char parm[DIAG308_VMPARM_SIZE + 1] = {};
298
299 if (ipl_block_valid && (ipl_block.pb0_hdr.pbt == IPL_PBT_CCW))
300 ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block);
301 return sprintf(page, "%s\n", parm);
302 }
303
304 static struct kobj_attribute sys_ipl_vm_parm_attr =
305 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
306
307 static ssize_t sys_ipl_device_show(struct kobject *kobj,
308 struct kobj_attribute *attr, char *page)
309 {
310 switch (ipl_info.type) {
311 case IPL_TYPE_CCW:
312 return sprintf(page, "0.%x.%04x\n", ipl_block.ccw.ssid,
313 ipl_block.ccw.devno);
314 case IPL_TYPE_FCP:
315 case IPL_TYPE_FCP_DUMP:
316 return sprintf(page, "0.0.%04x\n", ipl_block.fcp.devno);
317 default:
318 return 0;
319 }
320 }
321
322 static struct kobj_attribute sys_ipl_device_attr =
323 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
324
325 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
326 struct bin_attribute *attr, char *buf,
327 loff_t off, size_t count)
328 {
329 return memory_read_from_buffer(buf, count, &off, &ipl_block,
330 ipl_block.hdr.len);
331 }
332 static struct bin_attribute ipl_parameter_attr =
333 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
334 PAGE_SIZE);
335
336 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
337 struct bin_attribute *attr, char *buf,
338 loff_t off, size_t count)
339 {
340 unsigned int size = ipl_block.fcp.scp_data_len;
341 void *scp_data = &ipl_block.fcp.scp_data;
342
343 return memory_read_from_buffer(buf, count, &off, scp_data, size);
344 }
345 static struct bin_attribute ipl_scp_data_attr =
346 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
347
348 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
349 &ipl_parameter_attr,
350 &ipl_scp_data_attr,
351 NULL,
352 };
353
354 /* FCP ipl device attributes */
355
356 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
357 (unsigned long long)ipl_block.fcp.wwpn);
358 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
359 (unsigned long long)ipl_block.fcp.lun);
360 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
361 (unsigned long long)ipl_block.fcp.bootprog);
362 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
363 (unsigned long long)ipl_block.fcp.br_lba);
364
365 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
366 struct kobj_attribute *attr, char *page)
367 {
368 char loadparm[LOADPARM_LEN + 1] = {};
369
370 if (!sclp_ipl_info.is_valid)
371 return sprintf(page, "#unknown#\n");
372 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
373 EBCASC(loadparm, LOADPARM_LEN);
374 strim(loadparm);
375 return sprintf(page, "%s\n", loadparm);
376 }
377
378 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
379 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
380
381 static struct attribute *ipl_fcp_attrs[] = {
382 &sys_ipl_type_attr.attr,
383 &sys_ipl_device_attr.attr,
384 &sys_ipl_fcp_wwpn_attr.attr,
385 &sys_ipl_fcp_lun_attr.attr,
386 &sys_ipl_fcp_bootprog_attr.attr,
387 &sys_ipl_fcp_br_lba_attr.attr,
388 &sys_ipl_ccw_loadparm_attr.attr,
389 &sys_ipl_secure_attr.attr,
390 &sys_ipl_has_secure_attr.attr,
391 NULL,
392 };
393
394 static struct attribute_group ipl_fcp_attr_group = {
395 .attrs = ipl_fcp_attrs,
396 .bin_attrs = ipl_fcp_bin_attrs,
397 };
398
399 /* CCW ipl device attributes */
400
401 static struct attribute *ipl_ccw_attrs_vm[] = {
402 &sys_ipl_type_attr.attr,
403 &sys_ipl_device_attr.attr,
404 &sys_ipl_ccw_loadparm_attr.attr,
405 &sys_ipl_vm_parm_attr.attr,
406 &sys_ipl_secure_attr.attr,
407 &sys_ipl_has_secure_attr.attr,
408 NULL,
409 };
410
411 static struct attribute *ipl_ccw_attrs_lpar[] = {
412 &sys_ipl_type_attr.attr,
413 &sys_ipl_device_attr.attr,
414 &sys_ipl_ccw_loadparm_attr.attr,
415 &sys_ipl_secure_attr.attr,
416 &sys_ipl_has_secure_attr.attr,
417 NULL,
418 };
419
420 static struct attribute_group ipl_ccw_attr_group_vm = {
421 .attrs = ipl_ccw_attrs_vm,
422 };
423
424 static struct attribute_group ipl_ccw_attr_group_lpar = {
425 .attrs = ipl_ccw_attrs_lpar
426 };
427
428 /* UNKNOWN ipl device attributes */
429
430 static struct attribute *ipl_unknown_attrs[] = {
431 &sys_ipl_type_attr.attr,
432 NULL,
433 };
434
435 static struct attribute_group ipl_unknown_attr_group = {
436 .attrs = ipl_unknown_attrs,
437 };
438
439 static struct kset *ipl_kset;
440
441 static void __ipl_run(void *unused)
442 {
443 __bpon();
444 diag308(DIAG308_LOAD_CLEAR, NULL);
445 }
446
447 static void ipl_run(struct shutdown_trigger *trigger)
448 {
449 smp_call_ipl_cpu(__ipl_run, NULL);
450 }
451
452 static int __init ipl_init(void)
453 {
454 int rc;
455
456 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
457 if (!ipl_kset) {
458 rc = -ENOMEM;
459 goto out;
460 }
461 switch (ipl_info.type) {
462 case IPL_TYPE_CCW:
463 if (MACHINE_IS_VM)
464 rc = sysfs_create_group(&ipl_kset->kobj,
465 &ipl_ccw_attr_group_vm);
466 else
467 rc = sysfs_create_group(&ipl_kset->kobj,
468 &ipl_ccw_attr_group_lpar);
469 break;
470 case IPL_TYPE_FCP:
471 case IPL_TYPE_FCP_DUMP:
472 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
473 break;
474 default:
475 rc = sysfs_create_group(&ipl_kset->kobj,
476 &ipl_unknown_attr_group);
477 break;
478 }
479 out:
480 if (rc)
481 panic("ipl_init failed: rc = %i\n", rc);
482
483 return 0;
484 }
485
486 static struct shutdown_action __refdata ipl_action = {
487 .name = SHUTDOWN_ACTION_IPL_STR,
488 .fn = ipl_run,
489 .init = ipl_init,
490 };
491
492 /*
493 * reipl shutdown action: Reboot Linux on shutdown.
494 */
495
496 /* VM IPL PARM attributes */
497 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
498 char *page)
499 {
500 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
501
502 ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
503 return sprintf(page, "%s\n", vmparm);
504 }
505
506 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
507 size_t vmparm_max,
508 const char *buf, size_t len)
509 {
510 int i, ip_len;
511
512 /* ignore trailing newline */
513 ip_len = len;
514 if ((len > 0) && (buf[len - 1] == '\n'))
515 ip_len--;
516
517 if (ip_len > vmparm_max)
518 return -EINVAL;
519
520 /* parm is used to store kernel options, check for common chars */
521 for (i = 0; i < ip_len; i++)
522 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
523 return -EINVAL;
524
525 memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
526 ipb->ccw.vm_parm_len = ip_len;
527 if (ip_len > 0) {
528 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
529 memcpy(ipb->ccw.vm_parm, buf, ip_len);
530 ASCEBC(ipb->ccw.vm_parm, ip_len);
531 } else {
532 ipb->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_VP;
533 }
534
535 return len;
536 }
537
538 /* NSS wrapper */
539 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
540 struct kobj_attribute *attr, char *page)
541 {
542 return reipl_generic_vmparm_show(reipl_block_nss, page);
543 }
544
545 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
546 struct kobj_attribute *attr,
547 const char *buf, size_t len)
548 {
549 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
550 }
551
552 /* CCW wrapper */
553 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
554 struct kobj_attribute *attr, char *page)
555 {
556 return reipl_generic_vmparm_show(reipl_block_ccw, page);
557 }
558
559 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
560 struct kobj_attribute *attr,
561 const char *buf, size_t len)
562 {
563 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
564 }
565
566 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
567 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
568 reipl_nss_vmparm_store);
569 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
570 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
571 reipl_ccw_vmparm_store);
572
573 /* FCP reipl device attributes */
574
575 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
576 struct bin_attribute *attr,
577 char *buf, loff_t off, size_t count)
578 {
579 size_t size = reipl_block_fcp->fcp.scp_data_len;
580 void *scp_data = reipl_block_fcp->fcp.scp_data;
581
582 return memory_read_from_buffer(buf, count, &off, scp_data, size);
583 }
584
585 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
586 struct bin_attribute *attr,
587 char *buf, loff_t off, size_t count)
588 {
589 size_t scpdata_len = count;
590 size_t padding;
591
592
593 if (off)
594 return -EINVAL;
595
596 memcpy(reipl_block_fcp->fcp.scp_data, buf, count);
597 if (scpdata_len % 8) {
598 padding = 8 - (scpdata_len % 8);
599 memset(reipl_block_fcp->fcp.scp_data + scpdata_len,
600 0, padding);
601 scpdata_len += padding;
602 }
603
604 reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN + scpdata_len;
605 reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN + scpdata_len;
606 reipl_block_fcp->fcp.scp_data_len = scpdata_len;
607
608 return count;
609 }
610 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
611 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
612 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
613
614 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
615 &sys_reipl_fcp_scp_data_attr,
616 NULL,
617 };
618
619 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
620 reipl_block_fcp->fcp.wwpn);
621 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
622 reipl_block_fcp->fcp.lun);
623 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
624 reipl_block_fcp->fcp.bootprog);
625 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
626 reipl_block_fcp->fcp.br_lba);
627 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
628 reipl_block_fcp->fcp.devno);
629
630 static void reipl_get_ascii_loadparm(char *loadparm,
631 struct ipl_parameter_block *ibp)
632 {
633 memcpy(loadparm, ibp->common.loadparm, LOADPARM_LEN);
634 EBCASC(loadparm, LOADPARM_LEN);
635 loadparm[LOADPARM_LEN] = 0;
636 strim(loadparm);
637 }
638
639 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
640 char *page)
641 {
642 char buf[LOADPARM_LEN + 1];
643
644 reipl_get_ascii_loadparm(buf, ipb);
645 return sprintf(page, "%s\n", buf);
646 }
647
648 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
649 const char *buf, size_t len)
650 {
651 int i, lp_len;
652
653 /* ignore trailing newline */
654 lp_len = len;
655 if ((len > 0) && (buf[len - 1] == '\n'))
656 lp_len--;
657 /* loadparm can have max 8 characters and must not start with a blank */
658 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
659 return -EINVAL;
660 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
661 for (i = 0; i < lp_len; i++) {
662 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
663 (buf[i] == '.'))
664 continue;
665 return -EINVAL;
666 }
667 /* initialize loadparm with blanks */
668 memset(ipb->common.loadparm, ' ', LOADPARM_LEN);
669 /* copy and convert to ebcdic */
670 memcpy(ipb->common.loadparm, buf, lp_len);
671 ASCEBC(ipb->common.loadparm, LOADPARM_LEN);
672 ipb->common.flags |= IPL_PB0_FLAG_LOADPARM;
673 return len;
674 }
675
676 /* FCP wrapper */
677 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
678 struct kobj_attribute *attr, char *page)
679 {
680 return reipl_generic_loadparm_show(reipl_block_fcp, page);
681 }
682
683 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
684 struct kobj_attribute *attr,
685 const char *buf, size_t len)
686 {
687 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
688 }
689
690 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
691 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
692 reipl_fcp_loadparm_store);
693
694 static struct attribute *reipl_fcp_attrs[] = {
695 &sys_reipl_fcp_device_attr.attr,
696 &sys_reipl_fcp_wwpn_attr.attr,
697 &sys_reipl_fcp_lun_attr.attr,
698 &sys_reipl_fcp_bootprog_attr.attr,
699 &sys_reipl_fcp_br_lba_attr.attr,
700 &sys_reipl_fcp_loadparm_attr.attr,
701 NULL,
702 };
703
704 static struct attribute_group reipl_fcp_attr_group = {
705 .attrs = reipl_fcp_attrs,
706 .bin_attrs = reipl_fcp_bin_attrs,
707 };
708
709 /* CCW reipl device attributes */
710 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw);
711
712 /* NSS wrapper */
713 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
714 struct kobj_attribute *attr, char *page)
715 {
716 return reipl_generic_loadparm_show(reipl_block_nss, page);
717 }
718
719 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
720 struct kobj_attribute *attr,
721 const char *buf, size_t len)
722 {
723 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
724 }
725
726 /* CCW wrapper */
727 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
728 struct kobj_attribute *attr, char *page)
729 {
730 return reipl_generic_loadparm_show(reipl_block_ccw, page);
731 }
732
733 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
734 struct kobj_attribute *attr,
735 const char *buf, size_t len)
736 {
737 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
738 }
739
740 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
741 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
742 reipl_ccw_loadparm_store);
743
744 static struct attribute *reipl_ccw_attrs_vm[] = {
745 &sys_reipl_ccw_device_attr.attr,
746 &sys_reipl_ccw_loadparm_attr.attr,
747 &sys_reipl_ccw_vmparm_attr.attr,
748 NULL,
749 };
750
751 static struct attribute *reipl_ccw_attrs_lpar[] = {
752 &sys_reipl_ccw_device_attr.attr,
753 &sys_reipl_ccw_loadparm_attr.attr,
754 NULL,
755 };
756
757 static struct attribute_group reipl_ccw_attr_group_vm = {
758 .name = IPL_CCW_STR,
759 .attrs = reipl_ccw_attrs_vm,
760 };
761
762 static struct attribute_group reipl_ccw_attr_group_lpar = {
763 .name = IPL_CCW_STR,
764 .attrs = reipl_ccw_attrs_lpar,
765 };
766
767
768 /* NSS reipl device attributes */
769 static void reipl_get_ascii_nss_name(char *dst,
770 struct ipl_parameter_block *ipb)
771 {
772 memcpy(dst, ipb->ccw.nss_name, NSS_NAME_SIZE);
773 EBCASC(dst, NSS_NAME_SIZE);
774 dst[NSS_NAME_SIZE] = 0;
775 }
776
777 static ssize_t reipl_nss_name_show(struct kobject *kobj,
778 struct kobj_attribute *attr, char *page)
779 {
780 char nss_name[NSS_NAME_SIZE + 1] = {};
781
782 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
783 return sprintf(page, "%s\n", nss_name);
784 }
785
786 static ssize_t reipl_nss_name_store(struct kobject *kobj,
787 struct kobj_attribute *attr,
788 const char *buf, size_t len)
789 {
790 int nss_len;
791
792 /* ignore trailing newline */
793 nss_len = len;
794 if ((len > 0) && (buf[len - 1] == '\n'))
795 nss_len--;
796
797 if (nss_len > NSS_NAME_SIZE)
798 return -EINVAL;
799
800 memset(reipl_block_nss->ccw.nss_name, 0x40, NSS_NAME_SIZE);
801 if (nss_len > 0) {
802 reipl_block_nss->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_NSS;
803 memcpy(reipl_block_nss->ccw.nss_name, buf, nss_len);
804 ASCEBC(reipl_block_nss->ccw.nss_name, nss_len);
805 EBC_TOUPPER(reipl_block_nss->ccw.nss_name, nss_len);
806 } else {
807 reipl_block_nss->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_NSS;
808 }
809
810 return len;
811 }
812
813 static struct kobj_attribute sys_reipl_nss_name_attr =
814 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
815 reipl_nss_name_store);
816
817 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
818 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
819 reipl_nss_loadparm_store);
820
821 static struct attribute *reipl_nss_attrs[] = {
822 &sys_reipl_nss_name_attr.attr,
823 &sys_reipl_nss_loadparm_attr.attr,
824 &sys_reipl_nss_vmparm_attr.attr,
825 NULL,
826 };
827
828 static struct attribute_group reipl_nss_attr_group = {
829 .name = IPL_NSS_STR,
830 .attrs = reipl_nss_attrs,
831 };
832
833 void set_os_info_reipl_block(void)
834 {
835 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
836 reipl_block_actual->hdr.len);
837 }
838
839 /* reipl type */
840
841 static int reipl_set_type(enum ipl_type type)
842 {
843 if (!(reipl_capabilities & type))
844 return -EINVAL;
845
846 switch(type) {
847 case IPL_TYPE_CCW:
848 reipl_block_actual = reipl_block_ccw;
849 break;
850 case IPL_TYPE_FCP:
851 reipl_block_actual = reipl_block_fcp;
852 break;
853 case IPL_TYPE_NSS:
854 reipl_block_actual = reipl_block_nss;
855 break;
856 default:
857 break;
858 }
859 reipl_type = type;
860 return 0;
861 }
862
863 static ssize_t reipl_type_show(struct kobject *kobj,
864 struct kobj_attribute *attr, char *page)
865 {
866 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
867 }
868
869 static ssize_t reipl_type_store(struct kobject *kobj,
870 struct kobj_attribute *attr,
871 const char *buf, size_t len)
872 {
873 int rc = -EINVAL;
874
875 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
876 rc = reipl_set_type(IPL_TYPE_CCW);
877 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
878 rc = reipl_set_type(IPL_TYPE_FCP);
879 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
880 rc = reipl_set_type(IPL_TYPE_NSS);
881 return (rc != 0) ? rc : len;
882 }
883
884 static struct kobj_attribute reipl_type_attr =
885 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
886
887 static struct kset *reipl_kset;
888 static struct kset *reipl_fcp_kset;
889
890 static void __reipl_run(void *unused)
891 {
892 switch (reipl_type) {
893 case IPL_TYPE_CCW:
894 diag308(DIAG308_SET, reipl_block_ccw);
895 diag308(DIAG308_LOAD_CLEAR, NULL);
896 break;
897 case IPL_TYPE_FCP:
898 diag308(DIAG308_SET, reipl_block_fcp);
899 diag308(DIAG308_LOAD_CLEAR, NULL);
900 break;
901 case IPL_TYPE_NSS:
902 diag308(DIAG308_SET, reipl_block_nss);
903 diag308(DIAG308_LOAD_CLEAR, NULL);
904 break;
905 case IPL_TYPE_UNKNOWN:
906 diag308(DIAG308_LOAD_CLEAR, NULL);
907 break;
908 case IPL_TYPE_FCP_DUMP:
909 break;
910 }
911 disabled_wait();
912 }
913
914 static void reipl_run(struct shutdown_trigger *trigger)
915 {
916 smp_call_ipl_cpu(__reipl_run, NULL);
917 }
918
919 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
920 {
921 ipb->hdr.len = IPL_BP_CCW_LEN;
922 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
923 ipb->pb0_hdr.len = IPL_BP0_CCW_LEN;
924 ipb->pb0_hdr.pbt = IPL_PBT_CCW;
925 }
926
927 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
928 {
929 /* LOADPARM */
930 /* check if read scp info worked and set loadparm */
931 if (sclp_ipl_info.is_valid)
932 memcpy(ipb->ccw.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
933 else
934 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
935 memset(ipb->ccw.loadparm, 0x40, LOADPARM_LEN);
936 ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM;
937
938 /* VM PARM */
939 if (MACHINE_IS_VM && ipl_block_valid &&
940 (ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) {
941
942 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
943 ipb->ccw.vm_parm_len = ipl_block.ccw.vm_parm_len;
944 memcpy(ipb->ccw.vm_parm,
945 ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE);
946 }
947 }
948
949 static int __init reipl_nss_init(void)
950 {
951 int rc;
952
953 if (!MACHINE_IS_VM)
954 return 0;
955
956 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
957 if (!reipl_block_nss)
958 return -ENOMEM;
959
960 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
961 if (rc)
962 return rc;
963
964 reipl_block_ccw_init(reipl_block_nss);
965 reipl_capabilities |= IPL_TYPE_NSS;
966 return 0;
967 }
968
969 static int __init reipl_ccw_init(void)
970 {
971 int rc;
972
973 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
974 if (!reipl_block_ccw)
975 return -ENOMEM;
976
977 rc = sysfs_create_group(&reipl_kset->kobj,
978 MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
979 : &reipl_ccw_attr_group_lpar);
980 if (rc)
981 return rc;
982
983 reipl_block_ccw_init(reipl_block_ccw);
984 if (ipl_info.type == IPL_TYPE_CCW) {
985 reipl_block_ccw->ccw.ssid = ipl_block.ccw.ssid;
986 reipl_block_ccw->ccw.devno = ipl_block.ccw.devno;
987 reipl_block_ccw_fill_parms(reipl_block_ccw);
988 }
989
990 reipl_capabilities |= IPL_TYPE_CCW;
991 return 0;
992 }
993
994 static int __init reipl_fcp_init(void)
995 {
996 int rc;
997
998 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
999 if (!reipl_block_fcp)
1000 return -ENOMEM;
1001
1002 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1003 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1004 &reipl_kset->kobj);
1005 if (!reipl_fcp_kset) {
1006 free_page((unsigned long) reipl_block_fcp);
1007 return -ENOMEM;
1008 }
1009
1010 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1011 if (rc) {
1012 kset_unregister(reipl_fcp_kset);
1013 free_page((unsigned long) reipl_block_fcp);
1014 return rc;
1015 }
1016
1017 if (ipl_info.type == IPL_TYPE_FCP) {
1018 memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
1019 /*
1020 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1021 * is invalid in the SCSI IPL parameter block, so take it
1022 * always from sclp_ipl_info.
1023 */
1024 memcpy(reipl_block_fcp->fcp.loadparm, sclp_ipl_info.loadparm,
1025 LOADPARM_LEN);
1026 } else {
1027 reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1028 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1029 reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1030 reipl_block_fcp->fcp.pbt = IPL_PBT_FCP;
1031 reipl_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_IPL;
1032 }
1033 reipl_capabilities |= IPL_TYPE_FCP;
1034 return 0;
1035 }
1036
1037 static int __init reipl_type_init(void)
1038 {
1039 enum ipl_type reipl_type = ipl_info.type;
1040 struct ipl_parameter_block *reipl_block;
1041 unsigned long size;
1042
1043 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1044 if (!reipl_block)
1045 goto out;
1046 /*
1047 * If we have an OS info reipl block, this will be used
1048 */
1049 if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) {
1050 memcpy(reipl_block_fcp, reipl_block, size);
1051 reipl_type = IPL_TYPE_FCP;
1052 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) {
1053 memcpy(reipl_block_ccw, reipl_block, size);
1054 reipl_type = IPL_TYPE_CCW;
1055 }
1056 out:
1057 return reipl_set_type(reipl_type);
1058 }
1059
1060 static int __init reipl_init(void)
1061 {
1062 int rc;
1063
1064 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1065 if (!reipl_kset)
1066 return -ENOMEM;
1067 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1068 if (rc) {
1069 kset_unregister(reipl_kset);
1070 return rc;
1071 }
1072 rc = reipl_ccw_init();
1073 if (rc)
1074 return rc;
1075 rc = reipl_fcp_init();
1076 if (rc)
1077 return rc;
1078 rc = reipl_nss_init();
1079 if (rc)
1080 return rc;
1081 return reipl_type_init();
1082 }
1083
1084 static struct shutdown_action __refdata reipl_action = {
1085 .name = SHUTDOWN_ACTION_REIPL_STR,
1086 .fn = reipl_run,
1087 .init = reipl_init,
1088 };
1089
1090 /*
1091 * dump shutdown action: Dump Linux on shutdown.
1092 */
1093
1094 /* FCP dump device attributes */
1095
1096 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1097 dump_block_fcp->fcp.wwpn);
1098 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1099 dump_block_fcp->fcp.lun);
1100 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1101 dump_block_fcp->fcp.bootprog);
1102 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1103 dump_block_fcp->fcp.br_lba);
1104 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1105 dump_block_fcp->fcp.devno);
1106
1107 static struct attribute *dump_fcp_attrs[] = {
1108 &sys_dump_fcp_device_attr.attr,
1109 &sys_dump_fcp_wwpn_attr.attr,
1110 &sys_dump_fcp_lun_attr.attr,
1111 &sys_dump_fcp_bootprog_attr.attr,
1112 &sys_dump_fcp_br_lba_attr.attr,
1113 NULL,
1114 };
1115
1116 static struct attribute_group dump_fcp_attr_group = {
1117 .name = IPL_FCP_STR,
1118 .attrs = dump_fcp_attrs,
1119 };
1120
1121 /* CCW dump device attributes */
1122 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw);
1123
1124 static struct attribute *dump_ccw_attrs[] = {
1125 &sys_dump_ccw_device_attr.attr,
1126 NULL,
1127 };
1128
1129 static struct attribute_group dump_ccw_attr_group = {
1130 .name = IPL_CCW_STR,
1131 .attrs = dump_ccw_attrs,
1132 };
1133
1134 /* dump type */
1135
1136 static int dump_set_type(enum dump_type type)
1137 {
1138 if (!(dump_capabilities & type))
1139 return -EINVAL;
1140 dump_type = type;
1141 return 0;
1142 }
1143
1144 static ssize_t dump_type_show(struct kobject *kobj,
1145 struct kobj_attribute *attr, char *page)
1146 {
1147 return sprintf(page, "%s\n", dump_type_str(dump_type));
1148 }
1149
1150 static ssize_t dump_type_store(struct kobject *kobj,
1151 struct kobj_attribute *attr,
1152 const char *buf, size_t len)
1153 {
1154 int rc = -EINVAL;
1155
1156 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1157 rc = dump_set_type(DUMP_TYPE_NONE);
1158 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1159 rc = dump_set_type(DUMP_TYPE_CCW);
1160 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1161 rc = dump_set_type(DUMP_TYPE_FCP);
1162 return (rc != 0) ? rc : len;
1163 }
1164
1165 static struct kobj_attribute dump_type_attr =
1166 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1167
1168 static struct kset *dump_kset;
1169
1170 static void diag308_dump(void *dump_block)
1171 {
1172 diag308(DIAG308_SET, dump_block);
1173 while (1) {
1174 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1175 break;
1176 udelay_simple(USEC_PER_SEC);
1177 }
1178 }
1179
1180 static void __dump_run(void *unused)
1181 {
1182 switch (dump_type) {
1183 case DUMP_TYPE_CCW:
1184 diag308_dump(dump_block_ccw);
1185 break;
1186 case DUMP_TYPE_FCP:
1187 diag308_dump(dump_block_fcp);
1188 break;
1189 default:
1190 break;
1191 }
1192 }
1193
1194 static void dump_run(struct shutdown_trigger *trigger)
1195 {
1196 if (dump_type == DUMP_TYPE_NONE)
1197 return;
1198 smp_send_stop();
1199 smp_call_ipl_cpu(__dump_run, NULL);
1200 }
1201
1202 static int __init dump_ccw_init(void)
1203 {
1204 int rc;
1205
1206 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1207 if (!dump_block_ccw)
1208 return -ENOMEM;
1209 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1210 if (rc) {
1211 free_page((unsigned long)dump_block_ccw);
1212 return rc;
1213 }
1214 dump_block_ccw->hdr.len = IPL_BP_CCW_LEN;
1215 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1216 dump_block_ccw->ccw.len = IPL_BP0_CCW_LEN;
1217 dump_block_ccw->ccw.pbt = IPL_PBT_CCW;
1218 dump_capabilities |= DUMP_TYPE_CCW;
1219 return 0;
1220 }
1221
1222 static int __init dump_fcp_init(void)
1223 {
1224 int rc;
1225
1226 if (!sclp_ipl_info.has_dump)
1227 return 0; /* LDIPL DUMP is not installed */
1228 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1229 if (!dump_block_fcp)
1230 return -ENOMEM;
1231 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1232 if (rc) {
1233 free_page((unsigned long)dump_block_fcp);
1234 return rc;
1235 }
1236 dump_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1237 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1238 dump_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1239 dump_block_fcp->fcp.pbt = IPL_PBT_FCP;
1240 dump_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_DUMP;
1241 dump_capabilities |= DUMP_TYPE_FCP;
1242 return 0;
1243 }
1244
1245 static int __init dump_init(void)
1246 {
1247 int rc;
1248
1249 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1250 if (!dump_kset)
1251 return -ENOMEM;
1252 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1253 if (rc) {
1254 kset_unregister(dump_kset);
1255 return rc;
1256 }
1257 rc = dump_ccw_init();
1258 if (rc)
1259 return rc;
1260 rc = dump_fcp_init();
1261 if (rc)
1262 return rc;
1263 dump_set_type(DUMP_TYPE_NONE);
1264 return 0;
1265 }
1266
1267 static struct shutdown_action __refdata dump_action = {
1268 .name = SHUTDOWN_ACTION_DUMP_STR,
1269 .fn = dump_run,
1270 .init = dump_init,
1271 };
1272
1273 static void dump_reipl_run(struct shutdown_trigger *trigger)
1274 {
1275 unsigned long ipib = (unsigned long) reipl_block_actual;
1276 unsigned int csum;
1277
1278 csum = (__force unsigned int)
1279 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1280 mem_assign_absolute(S390_lowcore.ipib, ipib);
1281 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1282 dump_run(trigger);
1283 }
1284
1285 static struct shutdown_action __refdata dump_reipl_action = {
1286 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1287 .fn = dump_reipl_run,
1288 };
1289
1290 /*
1291 * vmcmd shutdown action: Trigger vm command on shutdown.
1292 */
1293
1294 static char vmcmd_on_reboot[128];
1295 static char vmcmd_on_panic[128];
1296 static char vmcmd_on_halt[128];
1297 static char vmcmd_on_poff[128];
1298 static char vmcmd_on_restart[128];
1299
1300 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1301 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1302 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1303 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1304 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1305
1306 static struct attribute *vmcmd_attrs[] = {
1307 &sys_vmcmd_on_reboot_attr.attr,
1308 &sys_vmcmd_on_panic_attr.attr,
1309 &sys_vmcmd_on_halt_attr.attr,
1310 &sys_vmcmd_on_poff_attr.attr,
1311 &sys_vmcmd_on_restart_attr.attr,
1312 NULL,
1313 };
1314
1315 static struct attribute_group vmcmd_attr_group = {
1316 .attrs = vmcmd_attrs,
1317 };
1318
1319 static struct kset *vmcmd_kset;
1320
1321 static void vmcmd_run(struct shutdown_trigger *trigger)
1322 {
1323 char *cmd;
1324
1325 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1326 cmd = vmcmd_on_reboot;
1327 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1328 cmd = vmcmd_on_panic;
1329 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1330 cmd = vmcmd_on_halt;
1331 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1332 cmd = vmcmd_on_poff;
1333 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1334 cmd = vmcmd_on_restart;
1335 else
1336 return;
1337
1338 if (strlen(cmd) == 0)
1339 return;
1340 __cpcmd(cmd, NULL, 0, NULL);
1341 }
1342
1343 static int vmcmd_init(void)
1344 {
1345 if (!MACHINE_IS_VM)
1346 return -EOPNOTSUPP;
1347 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1348 if (!vmcmd_kset)
1349 return -ENOMEM;
1350 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1351 }
1352
1353 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1354 vmcmd_run, vmcmd_init};
1355
1356 /*
1357 * stop shutdown action: Stop Linux on shutdown.
1358 */
1359
1360 static void stop_run(struct shutdown_trigger *trigger)
1361 {
1362 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1363 strcmp(trigger->name, ON_RESTART_STR) == 0)
1364 disabled_wait();
1365 smp_stop_cpu();
1366 }
1367
1368 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1369 stop_run, NULL};
1370
1371 /* action list */
1372
1373 static struct shutdown_action *shutdown_actions_list[] = {
1374 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1375 &vmcmd_action, &stop_action};
1376 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1377
1378 /*
1379 * Trigger section
1380 */
1381
1382 static struct kset *shutdown_actions_kset;
1383
1384 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1385 size_t len)
1386 {
1387 int i;
1388
1389 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1390 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1391 if (shutdown_actions_list[i]->init_rc) {
1392 return shutdown_actions_list[i]->init_rc;
1393 } else {
1394 trigger->action = shutdown_actions_list[i];
1395 return len;
1396 }
1397 }
1398 }
1399 return -EINVAL;
1400 }
1401
1402 /* on reipl */
1403
1404 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1405 &reipl_action};
1406
1407 static ssize_t on_reboot_show(struct kobject *kobj,
1408 struct kobj_attribute *attr, char *page)
1409 {
1410 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1411 }
1412
1413 static ssize_t on_reboot_store(struct kobject *kobj,
1414 struct kobj_attribute *attr,
1415 const char *buf, size_t len)
1416 {
1417 return set_trigger(buf, &on_reboot_trigger, len);
1418 }
1419 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1420
1421 static void do_machine_restart(char *__unused)
1422 {
1423 smp_send_stop();
1424 on_reboot_trigger.action->fn(&on_reboot_trigger);
1425 reipl_run(NULL);
1426 }
1427 void (*_machine_restart)(char *command) = do_machine_restart;
1428
1429 /* on panic */
1430
1431 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1432
1433 static ssize_t on_panic_show(struct kobject *kobj,
1434 struct kobj_attribute *attr, char *page)
1435 {
1436 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1437 }
1438
1439 static ssize_t on_panic_store(struct kobject *kobj,
1440 struct kobj_attribute *attr,
1441 const char *buf, size_t len)
1442 {
1443 return set_trigger(buf, &on_panic_trigger, len);
1444 }
1445 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1446
1447 static void do_panic(void)
1448 {
1449 lgr_info_log();
1450 on_panic_trigger.action->fn(&on_panic_trigger);
1451 stop_run(&on_panic_trigger);
1452 }
1453
1454 /* on restart */
1455
1456 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1457 &stop_action};
1458
1459 static ssize_t on_restart_show(struct kobject *kobj,
1460 struct kobj_attribute *attr, char *page)
1461 {
1462 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1463 }
1464
1465 static ssize_t on_restart_store(struct kobject *kobj,
1466 struct kobj_attribute *attr,
1467 const char *buf, size_t len)
1468 {
1469 return set_trigger(buf, &on_restart_trigger, len);
1470 }
1471 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1472
1473 static void __do_restart(void *ignore)
1474 {
1475 __arch_local_irq_stosm(0x04); /* enable DAT */
1476 smp_send_stop();
1477 #ifdef CONFIG_CRASH_DUMP
1478 crash_kexec(NULL);
1479 #endif
1480 on_restart_trigger.action->fn(&on_restart_trigger);
1481 stop_run(&on_restart_trigger);
1482 }
1483
1484 void do_restart(void)
1485 {
1486 tracing_off();
1487 debug_locks_off();
1488 lgr_info_log();
1489 smp_call_online_cpu(__do_restart, NULL);
1490 }
1491
1492 /* on halt */
1493
1494 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1495
1496 static ssize_t on_halt_show(struct kobject *kobj,
1497 struct kobj_attribute *attr, char *page)
1498 {
1499 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1500 }
1501
1502 static ssize_t on_halt_store(struct kobject *kobj,
1503 struct kobj_attribute *attr,
1504 const char *buf, size_t len)
1505 {
1506 return set_trigger(buf, &on_halt_trigger, len);
1507 }
1508 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1509
1510 static void do_machine_halt(void)
1511 {
1512 smp_send_stop();
1513 on_halt_trigger.action->fn(&on_halt_trigger);
1514 stop_run(&on_halt_trigger);
1515 }
1516 void (*_machine_halt)(void) = do_machine_halt;
1517
1518 /* on power off */
1519
1520 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1521
1522 static ssize_t on_poff_show(struct kobject *kobj,
1523 struct kobj_attribute *attr, char *page)
1524 {
1525 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1526 }
1527
1528 static ssize_t on_poff_store(struct kobject *kobj,
1529 struct kobj_attribute *attr,
1530 const char *buf, size_t len)
1531 {
1532 return set_trigger(buf, &on_poff_trigger, len);
1533 }
1534 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1535
1536 static void do_machine_power_off(void)
1537 {
1538 smp_send_stop();
1539 on_poff_trigger.action->fn(&on_poff_trigger);
1540 stop_run(&on_poff_trigger);
1541 }
1542 void (*_machine_power_off)(void) = do_machine_power_off;
1543
1544 static struct attribute *shutdown_action_attrs[] = {
1545 &on_restart_attr.attr,
1546 &on_reboot_attr.attr,
1547 &on_panic_attr.attr,
1548 &on_halt_attr.attr,
1549 &on_poff_attr.attr,
1550 NULL,
1551 };
1552
1553 static struct attribute_group shutdown_action_attr_group = {
1554 .attrs = shutdown_action_attrs,
1555 };
1556
1557 static void __init shutdown_triggers_init(void)
1558 {
1559 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1560 firmware_kobj);
1561 if (!shutdown_actions_kset)
1562 goto fail;
1563 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1564 &shutdown_action_attr_group))
1565 goto fail;
1566 return;
1567 fail:
1568 panic("shutdown_triggers_init failed\n");
1569 }
1570
1571 static void __init shutdown_actions_init(void)
1572 {
1573 int i;
1574
1575 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1576 if (!shutdown_actions_list[i]->init)
1577 continue;
1578 shutdown_actions_list[i]->init_rc =
1579 shutdown_actions_list[i]->init();
1580 }
1581 }
1582
1583 static int __init s390_ipl_init(void)
1584 {
1585 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1586
1587 sclp_early_get_ipl_info(&sclp_ipl_info);
1588 /*
1589 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1590 * returned by read SCP info is invalid (contains EBCDIC blanks)
1591 * when the system has been booted via diag308. In that case we use
1592 * the value from diag308, if available.
1593 *
1594 * There are also systems where diag308 store does not work in
1595 * case the system is booted from HMC. Fortunately in this case
1596 * READ SCP info provides the correct value.
1597 */
1598 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
1599 memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN);
1600 shutdown_actions_init();
1601 shutdown_triggers_init();
1602 return 0;
1603 }
1604
1605 __initcall(s390_ipl_init);
1606
1607 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1608 {
1609 int sx, dx;
1610
1611 dx = 0;
1612 for (sx = 0; src[sx] != 0; sx++) {
1613 if (src[sx] == '"')
1614 continue;
1615 dst[dx++] = src[sx];
1616 if (dx >= n)
1617 break;
1618 }
1619 }
1620
1621 static int __init vmcmd_on_reboot_setup(char *str)
1622 {
1623 if (!MACHINE_IS_VM)
1624 return 1;
1625 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1626 vmcmd_on_reboot[127] = 0;
1627 on_reboot_trigger.action = &vmcmd_action;
1628 return 1;
1629 }
1630 __setup("vmreboot=", vmcmd_on_reboot_setup);
1631
1632 static int __init vmcmd_on_panic_setup(char *str)
1633 {
1634 if (!MACHINE_IS_VM)
1635 return 1;
1636 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1637 vmcmd_on_panic[127] = 0;
1638 on_panic_trigger.action = &vmcmd_action;
1639 return 1;
1640 }
1641 __setup("vmpanic=", vmcmd_on_panic_setup);
1642
1643 static int __init vmcmd_on_halt_setup(char *str)
1644 {
1645 if (!MACHINE_IS_VM)
1646 return 1;
1647 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1648 vmcmd_on_halt[127] = 0;
1649 on_halt_trigger.action = &vmcmd_action;
1650 return 1;
1651 }
1652 __setup("vmhalt=", vmcmd_on_halt_setup);
1653
1654 static int __init vmcmd_on_poff_setup(char *str)
1655 {
1656 if (!MACHINE_IS_VM)
1657 return 1;
1658 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1659 vmcmd_on_poff[127] = 0;
1660 on_poff_trigger.action = &vmcmd_action;
1661 return 1;
1662 }
1663 __setup("vmpoff=", vmcmd_on_poff_setup);
1664
1665 static int on_panic_notify(struct notifier_block *self,
1666 unsigned long event, void *data)
1667 {
1668 do_panic();
1669 return NOTIFY_OK;
1670 }
1671
1672 static struct notifier_block on_panic_nb = {
1673 .notifier_call = on_panic_notify,
1674 .priority = INT_MIN,
1675 };
1676
1677 void __init setup_ipl(void)
1678 {
1679 BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
1680
1681 ipl_info.type = get_ipl_type();
1682 switch (ipl_info.type) {
1683 case IPL_TYPE_CCW:
1684 ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid;
1685 ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno;
1686 break;
1687 case IPL_TYPE_FCP:
1688 case IPL_TYPE_FCP_DUMP:
1689 ipl_info.data.fcp.dev_id.ssid = 0;
1690 ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno;
1691 ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn;
1692 ipl_info.data.fcp.lun = ipl_block.fcp.lun;
1693 break;
1694 case IPL_TYPE_NSS:
1695 case IPL_TYPE_UNKNOWN:
1696 /* We have no info to copy */
1697 break;
1698 }
1699 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1700 }
1701
1702 void s390_reset_system(void)
1703 {
1704 /* Disable prefixing */
1705 set_prefix(0);
1706
1707 /* Disable lowcore protection */
1708 __ctl_clear_bit(0, 28);
1709 diag_dma_ops.diag308_reset();
1710 }
1711
1712 #ifdef CONFIG_KEXEC_FILE
1713
1714 int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
1715 unsigned char flags, unsigned short cert)
1716 {
1717 struct ipl_report_component *comp;
1718
1719 comp = vzalloc(sizeof(*comp));
1720 if (!comp)
1721 return -ENOMEM;
1722 list_add_tail(&comp->list, &report->components);
1723
1724 comp->entry.addr = kbuf->mem;
1725 comp->entry.len = kbuf->memsz;
1726 comp->entry.flags = flags;
1727 comp->entry.certificate_index = cert;
1728
1729 report->size += sizeof(comp->entry);
1730
1731 return 0;
1732 }
1733
1734 int ipl_report_add_certificate(struct ipl_report *report, void *key,
1735 unsigned long addr, unsigned long len)
1736 {
1737 struct ipl_report_certificate *cert;
1738
1739 cert = vzalloc(sizeof(*cert));
1740 if (!cert)
1741 return -ENOMEM;
1742 list_add_tail(&cert->list, &report->certificates);
1743
1744 cert->entry.addr = addr;
1745 cert->entry.len = len;
1746 cert->key = key;
1747
1748 report->size += sizeof(cert->entry);
1749 report->size += cert->entry.len;
1750
1751 return 0;
1752 }
1753
1754 struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib)
1755 {
1756 struct ipl_report *report;
1757
1758 report = vzalloc(sizeof(*report));
1759 if (!report)
1760 return ERR_PTR(-ENOMEM);
1761
1762 report->ipib = ipib;
1763 INIT_LIST_HEAD(&report->components);
1764 INIT_LIST_HEAD(&report->certificates);
1765
1766 report->size = ALIGN(ipib->hdr.len, 8);
1767 report->size += sizeof(struct ipl_rl_hdr);
1768 report->size += sizeof(struct ipl_rb_components);
1769 report->size += sizeof(struct ipl_rb_certificates);
1770
1771 return report;
1772 }
1773
1774 void *ipl_report_finish(struct ipl_report *report)
1775 {
1776 struct ipl_report_certificate *cert;
1777 struct ipl_report_component *comp;
1778 struct ipl_rb_certificates *certs;
1779 struct ipl_parameter_block *ipib;
1780 struct ipl_rb_components *comps;
1781 struct ipl_rl_hdr *rl_hdr;
1782 void *buf, *ptr;
1783
1784 buf = vzalloc(report->size);
1785 if (!buf)
1786 return ERR_PTR(-ENOMEM);
1787 ptr = buf;
1788
1789 memcpy(ptr, report->ipib, report->ipib->hdr.len);
1790 ipib = ptr;
1791 if (ipl_secure_flag)
1792 ipib->hdr.flags |= IPL_PL_FLAG_SIPL;
1793 ipib->hdr.flags |= IPL_PL_FLAG_IPLSR;
1794 ptr += report->ipib->hdr.len;
1795 ptr = PTR_ALIGN(ptr, 8);
1796
1797 rl_hdr = ptr;
1798 ptr += sizeof(*rl_hdr);
1799
1800 comps = ptr;
1801 comps->rbt = IPL_RBT_COMPONENTS;
1802 ptr += sizeof(*comps);
1803 list_for_each_entry(comp, &report->components, list) {
1804 memcpy(ptr, &comp->entry, sizeof(comp->entry));
1805 ptr += sizeof(comp->entry);
1806 }
1807 comps->len = ptr - (void *)comps;
1808
1809 certs = ptr;
1810 certs->rbt = IPL_RBT_CERTIFICATES;
1811 ptr += sizeof(*certs);
1812 list_for_each_entry(cert, &report->certificates, list) {
1813 memcpy(ptr, &cert->entry, sizeof(cert->entry));
1814 ptr += sizeof(cert->entry);
1815 }
1816 certs->len = ptr - (void *)certs;
1817 rl_hdr->len = ptr - (void *)rl_hdr;
1818
1819 list_for_each_entry(cert, &report->certificates, list) {
1820 memcpy(ptr, cert->key, cert->entry.len);
1821 ptr += cert->entry.len;
1822 }
1823
1824 BUG_ON(ptr > buf + report->size);
1825 return buf;
1826 }
1827
1828 int ipl_report_free(struct ipl_report *report)
1829 {
1830 struct ipl_report_component *comp, *ncomp;
1831 struct ipl_report_certificate *cert, *ncert;
1832
1833 list_for_each_entry_safe(comp, ncomp, &report->components, list)
1834 vfree(comp);
1835
1836 list_for_each_entry_safe(cert, ncert, &report->certificates, list)
1837 vfree(cert);
1838
1839 vfree(report);
1840
1841 return 0;
1842 }
1843
1844 #endif
Linux with added FPC-III support