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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 <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
62struct shutdown_action;
63struct 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
78struct shutdown_action {
79 char *name;
80 void (*fn) (struct shutdown_trigger *trigger);
81 int (*init) (void);
82 int init_rc;
83};
84
85static 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
102enum dump_type {
103 DUMP_TYPE_NONE = 1,
104 DUMP_TYPE_CCW = 2,
105 DUMP_TYPE_FCP = 4,
106};
107
108static 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
122int __bootdata_preserved(ipl_block_valid);
123struct ipl_parameter_block __bootdata_preserved(ipl_block);
124int __bootdata_preserved(ipl_secure_flag);
125
126unsigned long __bootdata_preserved(ipl_cert_list_addr);
127unsigned long __bootdata_preserved(ipl_cert_list_size);
128
129unsigned long __bootdata(early_ipl_comp_list_addr);
130unsigned long __bootdata(early_ipl_comp_list_size);
131
132static int reipl_capabilities = IPL_TYPE_UNKNOWN;
133
134static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
135static struct ipl_parameter_block *reipl_block_fcp;
136static struct ipl_parameter_block *reipl_block_ccw;
137static struct ipl_parameter_block *reipl_block_nss;
138static struct ipl_parameter_block *reipl_block_actual;
139
140static int dump_capabilities = DUMP_TYPE_NONE;
141static enum dump_type dump_type = DUMP_TYPE_NONE;
142static struct ipl_parameter_block *dump_block_fcp;
143static struct ipl_parameter_block *dump_block_ccw;
144
145static struct sclp_ipl_info sclp_ipl_info;
146
147static 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
161int 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}
168EXPORT_SYMBOL_GPL(diag308);
169
170/* SYSFS */
171
172#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
173static 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) \
181static 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) \
199IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
200 _ipl_blk.ssid, _ipl_blk.devno); \
201IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
202static 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) \
208IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
209static 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) \
213IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
214static 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} \
224static 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)\
230IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _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 strncpy(_value, buf, sizeof(_value) - 1); \
236 strim(_value); \
237 return len; \
238} \
239static 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
248static __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
265struct ipl_info ipl_info;
266EXPORT_SYMBOL_GPL(ipl_info);
267
268static 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
274static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
275
276static 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
282static struct kobj_attribute sys_ipl_secure_attr =
283 __ATTR(secure, 0444, ipl_secure_show, NULL);
284
285static 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
291static struct kobj_attribute sys_ipl_has_secure_attr =
292 __ATTR(has_secure, 0444, ipl_has_secure_show, NULL);
293
294static 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
304static struct kobj_attribute sys_ipl_vm_parm_attr =
305 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
306
307static 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
322static struct kobj_attribute sys_ipl_device_attr =
323 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
324
325static 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}
332static struct bin_attribute ipl_parameter_attr =
333 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
334 PAGE_SIZE);
335
336static 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}
345static struct bin_attribute ipl_scp_data_attr =
346 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
347
348static 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
356DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
357 (unsigned long long)ipl_block.fcp.wwpn);
358DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
359 (unsigned long long)ipl_block.fcp.lun);
360DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
361 (unsigned long long)ipl_block.fcp.bootprog);
362DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
363 (unsigned long long)ipl_block.fcp.br_lba);
364
365static 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
378static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
379 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
380
381static 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
394static 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
401static 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
411static 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
420static struct attribute_group ipl_ccw_attr_group_vm = {
421 .attrs = ipl_ccw_attrs_vm,
422};
423
424static struct attribute_group ipl_ccw_attr_group_lpar = {
425 .attrs = ipl_ccw_attrs_lpar
426};
427
428/* UNKNOWN ipl device attributes */
429
430static struct attribute *ipl_unknown_attrs[] = {
431 &sys_ipl_type_attr.attr,
432 NULL,
433};
434
435static struct attribute_group ipl_unknown_attr_group = {
436 .attrs = ipl_unknown_attrs,
437};
438
439static struct kset *ipl_kset;
440
441static void __ipl_run(void *unused)
442{
443 __bpon();
444 diag308(DIAG308_LOAD_CLEAR, NULL);
445}
446
447static void ipl_run(struct shutdown_trigger *trigger)
448{
449 smp_call_ipl_cpu(__ipl_run, NULL);
450}
451
452static 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 }
479out:
480 if (rc)
481 panic("ipl_init failed: rc = %i\n", rc);
482
483 return 0;
484}
485
486static 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 */
497static 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
506static 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 */
539static 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
545static 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 */
553static 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
559static 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
566static struct kobj_attribute sys_reipl_nss_vmparm_attr =
567 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
568 reipl_nss_vmparm_store);
569static 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
575static 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
585static 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}
610static 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
614static struct bin_attribute *reipl_fcp_bin_attrs[] = {
615 &sys_reipl_fcp_scp_data_attr,
616 NULL,
617};
618
619DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
620 reipl_block_fcp->fcp.wwpn);
621DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
622 reipl_block_fcp->fcp.lun);
623DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
624 reipl_block_fcp->fcp.bootprog);
625DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
626 reipl_block_fcp->fcp.br_lba);
627DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
628 reipl_block_fcp->fcp.devno);
629
630static 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
639static 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
648static 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 */
677static 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
683static 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
690static 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
694static 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
704static 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 */
710DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw);
711
712/* NSS wrapper */
713static 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
719static 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 */
727static 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
733static 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
740static 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
744static 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
751static struct attribute *reipl_ccw_attrs_lpar[] = {
752 &sys_reipl_ccw_device_attr.attr,
753 &sys_reipl_ccw_loadparm_attr.attr,
754 NULL,
755};
756
757static struct attribute_group reipl_ccw_attr_group_vm = {
758 .name = IPL_CCW_STR,
759 .attrs = reipl_ccw_attrs_vm,
760};
761
762static 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 */
769static 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
777static 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
786static 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
813static 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
817static 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
821static 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
828static struct attribute_group reipl_nss_attr_group = {
829 .name = IPL_NSS_STR,
830 .attrs = reipl_nss_attrs,
831};
832
833void 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
841static 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
863static 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
869static 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
884static struct kobj_attribute reipl_type_attr =
885 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
886
887static struct kset *reipl_kset;
888static struct kset *reipl_fcp_kset;
889
890static 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
914static void reipl_run(struct shutdown_trigger *trigger)
915{
916 smp_call_ipl_cpu(__reipl_run, NULL);
917}
918
919static 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
927static 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
949static 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
969static 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
994static 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
1037static 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 }
1056out:
1057 return reipl_set_type(reipl_type);
1058}
1059
1060static 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
1084static 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
1096DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1097 dump_block_fcp->fcp.wwpn);
1098DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1099 dump_block_fcp->fcp.lun);
1100DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1101 dump_block_fcp->fcp.bootprog);
1102DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1103 dump_block_fcp->fcp.br_lba);
1104DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1105 dump_block_fcp->fcp.devno);
1106
1107static 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
1116static struct attribute_group dump_fcp_attr_group = {
1117 .name = IPL_FCP_STR,
1118 .attrs = dump_fcp_attrs,
1119};
1120
1121/* CCW dump device attributes */
1122DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw);
1123
1124static struct attribute *dump_ccw_attrs[] = {
1125 &sys_dump_ccw_device_attr.attr,
1126 NULL,
1127};
1128
1129static struct attribute_group dump_ccw_attr_group = {
1130 .name = IPL_CCW_STR,
1131 .attrs = dump_ccw_attrs,
1132};
1133
1134/* dump type */
1135
1136static 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
1144static 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
1150static 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
1165static struct kobj_attribute dump_type_attr =
1166 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1167
1168static struct kset *dump_kset;
1169
1170static 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
1180static 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
1194static 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
1202static 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
1222static 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
1245static 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
1267static struct shutdown_action __refdata dump_action = {
1268 .name = SHUTDOWN_ACTION_DUMP_STR,
1269 .fn = dump_run,
1270 .init = dump_init,
1271};
1272
1273static 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
1285static 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
1294static char vmcmd_on_reboot[128];
1295static char vmcmd_on_panic[128];
1296static char vmcmd_on_halt[128];
1297static char vmcmd_on_poff[128];
1298static char vmcmd_on_restart[128];
1299
1300DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1301DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1302DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1303DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1304DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1305
1306static 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
1315static struct attribute_group vmcmd_attr_group = {
1316 .attrs = vmcmd_attrs,
1317};
1318
1319static struct kset *vmcmd_kset;
1320
1321static 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
1343static 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
1353static 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
1360static 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
1368static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1369 stop_run, NULL};
1370
1371/* action list */
1372
1373static 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
1382static struct kset *shutdown_actions_kset;
1383
1384static 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
1404static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1405 &reipl_action};
1406
1407static 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
1413static 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}
1419static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1420
1421static 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}
1427void (*_machine_restart)(char *command) = do_machine_restart;
1428
1429/* on panic */
1430
1431static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1432
1433static 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
1439static 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}
1445static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1446
1447static 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
1456static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1457 &stop_action};
1458
1459static 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
1465static 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}
1471static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1472
1473static 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
1484void 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
1494static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1495
1496static 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
1502static 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}
1508static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1509
1510static 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}
1516void (*_machine_halt)(void) = do_machine_halt;
1517
1518/* on power off */
1519
1520static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1521
1522static 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
1528static 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}
1534static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1535
1536static 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}
1542void (*_machine_power_off)(void) = do_machine_power_off;
1543
1544static 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
1553static struct attribute_group shutdown_action_attr_group = {
1554 .attrs = shutdown_action_attrs,
1555};
1556
1557static 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;
1567fail:
1568 panic("shutdown_triggers_init failed\n");
1569}
1570
1571static 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
1583static 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
1607static 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
1621static 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
1632static 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
1643static 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
1654static 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
1665static int on_panic_notify(struct notifier_block *self,
1666 unsigned long event, void *data)
1667{
1668 do_panic();
1669 return NOTIFY_OK;
1670}
1671
1672static struct notifier_block on_panic_nb = {
1673 .notifier_call = on_panic_notify,
1674 .priority = INT_MIN,
1675};
1676
1677void __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
1702void 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
1714int 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
1734int 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
1754struct 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
1774void *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
1828int 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
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