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