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s390/ipl: Use diagnose 8 command separation
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / s390 / kernel / ipl.c
CommitLineData
ff6b8ea6 1/*
ff6b8ea6
MH		 2 * ipl/reipl/dump support for Linux on s390.
3 *
a53c8fab 4 * Copyright IBM Corp. 2005, 2012
ff6b8ea6
MH		 5 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
6 * Heiko Carstens <heiko.carstens@de.ibm.com>
7 * Volker Sameske <sameske@de.ibm.com>
8 */
9
10#include <linux/types.h>
11#include <linux/module.h>
12#include <linux/device.h>
13#include <linux/delay.h>
14#include <linux/reboot.h>
03a4d208 15#include <linux/ctype.h>
0788fea4 16#include <linux/fs.h>
5a0e3ad6 17#include <linux/gfp.h>
60a0c68d 18#include <linux/crash_dump.h>
3ab121ab 19#include <linux/debug_locks.h>
46b05d26 20#include <asm/ipl.h>
ff6b8ea6
MH		 21#include <asm/smp.h>
22#include <asm/setup.h>
23#include <asm/cpcmd.h>
24#include <asm/cio.h>
03a4d208 25#include <asm/ebcdic.h>
15e9b586 26#include <asm/reset.h>
ab14de6c 27#include <asm/sclp.h>
159d1ff8 28#include <asm/checksum.h>
3ab121ab 29#include <asm/debug.h>
4857d4bb 30#include <asm/os_info.h>
638ad34a 31#include "entry.h"
ff6b8ea6
MH		 32
33#define IPL_PARM_BLOCK_VERSION 0
03a4d208 34
411ed322
MH		 35#define IPL_UNKNOWN_STR "unknown"
36#define IPL_CCW_STR "ccw"
37#define IPL_FCP_STR "fcp"
38#define IPL_FCP_DUMP_STR "fcp_dump"
39#define IPL_NSS_STR "nss"
615b04b3 40
99ca4e58
MH		 41#define DUMP_CCW_STR "ccw"
42#define DUMP_FCP_STR "fcp"
43#define DUMP_NONE_STR "none"
44
45/*
46 * Four shutdown trigger types are supported:
47 * - panic
48 * - halt
49 * - power off
50 * - reipl
7dd6b334 51 * - restart
99ca4e58
MH		 52 */
53#define ON_PANIC_STR "on_panic"
54#define ON_HALT_STR "on_halt"
55#define ON_POFF_STR "on_poff"
56#define ON_REIPL_STR "on_reboot"
7dd6b334 57#define ON_RESTART_STR "on_restart"
99ca4e58
MH		 58
59struct shutdown_action;
60struct shutdown_trigger {
61 char *name;
62 struct shutdown_action *action;
63};
64
65/*
099b7651 66 * The following shutdown action types are supported:
99ca4e58
MH		 67 */
68#define SHUTDOWN_ACTION_IPL_STR "ipl"
69#define SHUTDOWN_ACTION_REIPL_STR "reipl"
70#define SHUTDOWN_ACTION_DUMP_STR "dump"
71#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
72#define SHUTDOWN_ACTION_STOP_STR "stop"
099b7651 73#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
99ca4e58
MH		 74
75struct shutdown_action {
76 char *name;
77 void (*fn) (struct shutdown_trigger *trigger);
78 int (*init) (void);
81088819 79 int init_rc;
99ca4e58
MH		 80};
81
ff6b8ea6
MH		 82static char *ipl_type_str(enum ipl_type type)
83{
84 switch (type) {
ff6b8ea6
MH		 85 case IPL_TYPE_CCW:
86 return IPL_CCW_STR;
87 case IPL_TYPE_FCP:
88 return IPL_FCP_STR;
411ed322
MH		 89 case IPL_TYPE_FCP_DUMP:
90 return IPL_FCP_DUMP_STR;
fe355b7f
HY		 91 case IPL_TYPE_NSS:
92 return IPL_NSS_STR;
ff6b8ea6
MH		 93 case IPL_TYPE_UNKNOWN:
94 default:
95 return IPL_UNKNOWN_STR;
96 }
97}
98
411ed322
MH		 99enum dump_type {
100 DUMP_TYPE_NONE = 1,
101 DUMP_TYPE_CCW = 2,
102 DUMP_TYPE_FCP = 4,
103};
104
411ed322
MH		 105static char *dump_type_str(enum dump_type type)
106{
107 switch (type) {
108 case DUMP_TYPE_NONE:
109 return DUMP_NONE_STR;
110 case DUMP_TYPE_CCW:
111 return DUMP_CCW_STR;
112 case DUMP_TYPE_FCP:
113 return DUMP_FCP_STR;
114 default:
115 return NULL;
116 }
117}
118
119/*
120 * Must be in data section since the bss section
121 * is not cleared when these are accessed.
122 */
123static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
124u32 ipl_flags __attribute__((__section__(".data"))) = 0;
125
ff6b8ea6 126enum ipl_method {
411ed322
MH		 127 REIPL_METHOD_CCW_CIO,
128 REIPL_METHOD_CCW_DIAG,
129 REIPL_METHOD_CCW_VM,
130 REIPL_METHOD_FCP_RO_DIAG,
131 REIPL_METHOD_FCP_RW_DIAG,
132 REIPL_METHOD_FCP_RO_VM,
133 REIPL_METHOD_FCP_DUMP,
134 REIPL_METHOD_NSS,
a0443fbb 135 REIPL_METHOD_NSS_DIAG,
411ed322
MH		 136 REIPL_METHOD_DEFAULT,
137};
138
139enum dump_method {
140 DUMP_METHOD_NONE,
141 DUMP_METHOD_CCW_CIO,
142 DUMP_METHOD_CCW_DIAG,
143 DUMP_METHOD_CCW_VM,
144 DUMP_METHOD_FCP_DIAG,
ff6b8ea6
MH		 145};
146
ff6b8ea6
MH		 147static int diag308_set_works = 0;
148
a0443fbb
HB		 149static struct ipl_parameter_block ipl_block;
150
ff6b8ea6 151static int reipl_capabilities = IPL_TYPE_UNKNOWN;
fe355b7f 152
ff6b8ea6 153static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
411ed322 154static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
ff6b8ea6
MH		 155static struct ipl_parameter_block *reipl_block_fcp;
156static struct ipl_parameter_block *reipl_block_ccw;
a0443fbb 157static struct ipl_parameter_block *reipl_block_nss;
099b7651 158static struct ipl_parameter_block *reipl_block_actual;
fe355b7f 159
411ed322
MH		 160static int dump_capabilities = DUMP_TYPE_NONE;
161static enum dump_type dump_type = DUMP_TYPE_NONE;
162static enum dump_method dump_method = DUMP_METHOD_NONE;
ff6b8ea6
MH		 163static struct ipl_parameter_block *dump_block_fcp;
164static struct ipl_parameter_block *dump_block_ccw;
165
05dd2530
HC		 166static struct sclp_ipl_info sclp_ipl_info;
167
46b05d26 168int diag308(unsigned long subcode, void *addr)
ff6b8ea6 169{
94c12cc7 170 register unsigned long _addr asm("0") = (unsigned long) addr;
ff6b8ea6
MH		 171 register unsigned long _rc asm("1") = 0;
172
94c12cc7
MS		 173 asm volatile(
174 " diag %0,%2,0x308\n"
175 "0:\n"
176 EX_TABLE(0b,0b)
ff6b8ea6 177 : "+d" (_addr), "+d" (_rc)
94c12cc7 178 : "d" (subcode) : "cc", "memory");
ff6b8ea6
MH		 179 return _rc;
180}
411ed322 181EXPORT_SYMBOL_GPL(diag308);
ff6b8ea6
MH		 182
183/* SYSFS */
184
185#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
9b949165
GKH		 186static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
187 struct kobj_attribute *attr, \
ff6b8ea6
MH		 188 char *page) \
189{ \
190 return sprintf(page, _format, _value); \
191} \
9b949165 192static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
ff6b8ea6
MH		 193 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
194
195#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
9b949165
GKH		 196static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
197 struct kobj_attribute *attr, \
ff6b8ea6
MH		 198 char *page) \
199{ \
200 return sprintf(page, _fmt_out, \
201 (unsigned long long) _value); \
202} \
9b949165
GKH		 203static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
204 struct kobj_attribute *attr, \
ff6b8ea6
MH		 205 const char *buf, size_t len) \
206{ \
207 unsigned long long value; \
208 if (sscanf(buf, _fmt_in, &value) != 1) \
209 return -EINVAL; \
210 _value = value; \
211 return len; \
212} \
9b949165 213static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
ff6b8ea6
MH		 214 __ATTR(_name,(S_IRUGO | S_IWUSR), \
215 sys_##_prefix##_##_name##_show, \
216 sys_##_prefix##_##_name##_store);
217
fe355b7f 218#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
9b949165
GKH		 219static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
220 struct kobj_attribute *attr, \
fe355b7f
HY		 221 char *page) \
222{ \
223 return sprintf(page, _fmt_out, _value); \
224} \
9b949165
GKH		 225static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
226 struct kobj_attribute *attr, \
fe355b7f
HY		 227 const char *buf, size_t len) \
228{ \
99ca4e58 229 strncpy(_value, buf, sizeof(_value) - 1); \
1d802e24 230 strim(_value); \
fe355b7f
HY		 231 return len; \
232} \
9b949165 233static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
fe355b7f
HY		 234 __ATTR(_name,(S_IRUGO | S_IWUSR), \
235 sys_##_prefix##_##_name##_show, \
236 sys_##_prefix##_##_name##_store);
237
ff6b8ea6
MH		 238static void make_attrs_ro(struct attribute **attrs)
239{
240 while (*attrs) {
241 (*attrs)->mode = S_IRUGO;
242 attrs++;
243 }
244}
245
246/*
247 * ipl section
248 */
249
411ed322 250static __init enum ipl_type get_ipl_type(void)
ff6b8ea6
MH		 251{
252 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
253
fe355b7f
HY		 254 if (ipl_flags & IPL_NSS_VALID)
255 return IPL_TYPE_NSS;
e87bfe51 256 if (!(ipl_flags & IPL_DEVNO_VALID))
ff6b8ea6 257 return IPL_TYPE_UNKNOWN;
e87bfe51 258 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
ff6b8ea6
MH		 259 return IPL_TYPE_CCW;
260 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
261 return IPL_TYPE_UNKNOWN;
262 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
263 return IPL_TYPE_UNKNOWN;
411ed322
MH		 264 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
265 return IPL_TYPE_FCP_DUMP;
ff6b8ea6
MH		 266 return IPL_TYPE_FCP;
267}
268
411ed322
MH		 269struct ipl_info ipl_info;
270EXPORT_SYMBOL_GPL(ipl_info);
271
9b949165
GKH		 272static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
273 char *page)
ff6b8ea6 274{
411ed322 275 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
ff6b8ea6
MH		 276}
277
9b949165 278static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
ff6b8ea6 279
a0443fbb 280/* VM IPL PARM routines */
c4736d96
MS		 281static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
282 const struct ipl_parameter_block *ipb)
a0443fbb
HB		 283{
284 int i;
684d2fd4 285 size_t len;
a0443fbb
HB		 286 char has_lowercase = 0;
287
684d2fd4 288 len = 0;
a0443fbb
HB		 289 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
290 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
291
684d2fd4 292 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
a0443fbb
HB		 293 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
294 /* If at least one character is lowercase, we assume mixed
295 * case; otherwise we convert everything to lowercase.
296 */
297 for (i = 0; i < len; i++)
298 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
299 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
300 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
301 has_lowercase = 1;
302 break;
303 }
304 if (!has_lowercase)
305 EBC_TOLOWER(dest, len);
306 EBCASC(dest, len);
307 }
308 dest[len] = 0;
684d2fd4
HB		 309
310 return len;
a0443fbb
HB		 311}
312
684d2fd4 313size_t append_ipl_vmparm(char *dest, size_t size)
a0443fbb 314{
684d2fd4
HB		 315 size_t rc;
316
317 rc = 0;
a0443fbb 318 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
684d2fd4 319 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
a0443fbb
HB		 320 else
321 dest[0] = 0;
684d2fd4 322 return rc;
a0443fbb
HB		 323}
324
325static ssize_t ipl_vm_parm_show(struct kobject *kobj,
326 struct kobj_attribute *attr, char *page)
327{
328 char parm[DIAG308_VMPARM_SIZE + 1] = {};
329
684d2fd4 330 append_ipl_vmparm(parm, sizeof(parm));
a0443fbb
HB		 331 return sprintf(page, "%s\n", parm);
332}
333
684d2fd4
HB		 334static size_t scpdata_length(const char* buf, size_t count)
335{
336 while (count) {
337 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
338 break;
339 count--;
340 }
341 return count;
342}
343
c4736d96
MS		 344static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
345 const struct ipl_parameter_block *ipb)
684d2fd4
HB		 346{
347 size_t count;
348 size_t i;
18d00acf 349 int has_lowercase;
684d2fd4
HB		 350
351 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
352 ipb->ipl_info.fcp.scp_data_len));
353 if (!count)
354 goto out;
355
18d00acf
HB		 356 has_lowercase = 0;
357 for (i = 0; i < count; i++) {
684d2fd4
HB		 358 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
359 count = 0;
360 goto out;
361 }
18d00acf
HB		 362 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
363 has_lowercase = 1;
364 }
684d2fd4 365
18d00acf
HB		 366 if (has_lowercase)
367 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
368 else
369 for (i = 0; i < count; i++)
370 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
684d2fd4
HB		 371out:
372 dest[count] = '\0';
373 return count;
374}
375
376size_t append_ipl_scpdata(char *dest, size_t len)
377{
378 size_t rc;
379
380 rc = 0;
381 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
382 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
383 else
384 dest[0] = 0;
385 return rc;
386}
387
388
a0443fbb
HB		 389static struct kobj_attribute sys_ipl_vm_parm_attr =
390 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
391
9b949165
GKH		 392static ssize_t sys_ipl_device_show(struct kobject *kobj,
393 struct kobj_attribute *attr, char *page)
ff6b8ea6
MH		 394{
395 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
396
411ed322 397 switch (ipl_info.type) {
ff6b8ea6
MH		 398 case IPL_TYPE_CCW:
399 return sprintf(page, "0.0.%04x\n", ipl_devno);
400 case IPL_TYPE_FCP:
411ed322 401 case IPL_TYPE_FCP_DUMP:
ff6b8ea6
MH		 402 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
403 default:
404 return 0;
405 }
406}
407
9b949165 408static struct kobj_attribute sys_ipl_device_attr =
ff6b8ea6
MH		 409 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
410
2c3c8bea
CW		 411static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
412 struct bin_attribute *attr, char *buf,
413 loff_t off, size_t count)
ff6b8ea6 414{
0788fea4
AM		 415 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
416 IPL_PARMBLOCK_SIZE);
ff6b8ea6
MH		 417}
418
419static struct bin_attribute ipl_parameter_attr = {
420 .attr = {
421 .name = "binary_parameter",
422 .mode = S_IRUGO,
ff6b8ea6
MH		 423 },
424 .size = PAGE_SIZE,
425 .read = &ipl_parameter_read,
426};
427
2c3c8bea
CW		 428static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
429 struct bin_attribute *attr, char *buf,
430 loff_t off, size_t count)
ff6b8ea6
MH		 431{
432 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
433 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
434
0788fea4 435 return memory_read_from_buffer(buf, count, &off, scp_data, size);
ff6b8ea6
MH		 436}
437
438static struct bin_attribute ipl_scp_data_attr = {
439 .attr = {
440 .name = "scp_data",
441 .mode = S_IRUGO,
ff6b8ea6
MH		 442 },
443 .size = PAGE_SIZE,
05bd711e 444 .read = ipl_scp_data_read,
ff6b8ea6
MH		 445};
446
447/* FCP ipl device attributes */
448
449DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
450 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
451DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
452 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
453DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
454 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
455DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
456 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
457
458static struct attribute *ipl_fcp_attrs[] = {
459 &sys_ipl_type_attr.attr,
460 &sys_ipl_device_attr.attr,
461 &sys_ipl_fcp_wwpn_attr.attr,
462 &sys_ipl_fcp_lun_attr.attr,
463 &sys_ipl_fcp_bootprog_attr.attr,
464 &sys_ipl_fcp_br_lba_attr.attr,
465 NULL,
466};
467
468static struct attribute_group ipl_fcp_attr_group = {
469 .attrs = ipl_fcp_attrs,
470};
471
472/* CCW ipl device attributes */
473
9b949165
GKH		 474static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
475 struct kobj_attribute *attr, char *page)
03a4d208
MH		 476{
477 char loadparm[LOADPARM_LEN + 1] = {};
478
05dd2530 479 if (!sclp_ipl_info.is_valid)
03a4d208 480 return sprintf(page, "#unknown#\n");
05dd2530 481 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
03a4d208 482 EBCASC(loadparm, LOADPARM_LEN);
1d802e24 483 strim(loadparm);
03a4d208
MH		 484 return sprintf(page, "%s\n", loadparm);
485}
486
9b949165 487static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
03a4d208
MH		 488 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
489
a0443fbb
HB		 490static struct attribute *ipl_ccw_attrs_vm[] = {
491 &sys_ipl_type_attr.attr,
492 &sys_ipl_device_attr.attr,
493 &sys_ipl_ccw_loadparm_attr.attr,
494 &sys_ipl_vm_parm_attr.attr,
495 NULL,
496};
497
498static struct attribute *ipl_ccw_attrs_lpar[] = {
ff6b8ea6
MH		 499 &sys_ipl_type_attr.attr,
500 &sys_ipl_device_attr.attr,
03a4d208 501 &sys_ipl_ccw_loadparm_attr.attr,
ff6b8ea6
MH		 502 NULL,
503};
504
a0443fbb
HB		 505static struct attribute_group ipl_ccw_attr_group_vm = {
506 .attrs = ipl_ccw_attrs_vm,
507};
508
509static struct attribute_group ipl_ccw_attr_group_lpar = {
510 .attrs = ipl_ccw_attrs_lpar
ff6b8ea6
MH		 511};
512
fe355b7f
HY		 513/* NSS ipl device attributes */
514
515DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
516
517static struct attribute *ipl_nss_attrs[] = {
518 &sys_ipl_type_attr.attr,
519 &sys_ipl_nss_name_attr.attr,
a0443fbb
HB		 520 &sys_ipl_ccw_loadparm_attr.attr,
521 &sys_ipl_vm_parm_attr.attr,
fe355b7f
HY		 522 NULL,
523};
524
525static struct attribute_group ipl_nss_attr_group = {
526 .attrs = ipl_nss_attrs,
527};
528
ff6b8ea6
MH		 529/* UNKNOWN ipl device attributes */
530
531static struct attribute *ipl_unknown_attrs[] = {
532 &sys_ipl_type_attr.attr,
533 NULL,
534};
535
536static struct attribute_group ipl_unknown_attr_group = {
537 .attrs = ipl_unknown_attrs,
538};
539
d91885be 540static struct kset *ipl_kset;
ff6b8ea6 541
99ca4e58
MH		 542static int __init ipl_register_fcp_files(void)
543{
544 int rc;
545
546 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
547 if (rc)
548 goto out;
549 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
550 if (rc)
551 goto out_ipl_parm;
552 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
553 if (!rc)
554 goto out;
555
556 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
557
558out_ipl_parm:
559 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
560out:
561 return rc;
562}
563
2c2df118 564static void __ipl_run(void *unused)
99ca4e58
MH		 565{
566 diag308(DIAG308_IPL, NULL);
567 if (MACHINE_IS_VM)
568 __cpcmd("IPL", NULL, 0, NULL);
569 else if (ipl_info.type == IPL_TYPE_CCW)
570 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
571}
572
2c2df118
HC		 573static void ipl_run(struct shutdown_trigger *trigger)
574{
8b646bd7 575 smp_call_ipl_cpu(__ipl_run, NULL);
2c2df118
HC		 576}
577
2bc89b5e 578static int __init ipl_init(void)
99ca4e58
MH		 579{
580 int rc;
581
582 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
583 if (!ipl_kset) {
584 rc = -ENOMEM;
585 goto out;
586 }
587 switch (ipl_info.type) {
588 case IPL_TYPE_CCW:
a0443fbb
HB		 589 if (MACHINE_IS_VM)
590 rc = sysfs_create_group(&ipl_kset->kobj,
591 &ipl_ccw_attr_group_vm);
592 else
593 rc = sysfs_create_group(&ipl_kset->kobj,
594 &ipl_ccw_attr_group_lpar);
99ca4e58
MH		 595 break;
596 case IPL_TYPE_FCP:
597 case IPL_TYPE_FCP_DUMP:
598 rc = ipl_register_fcp_files();
599 break;
600 case IPL_TYPE_NSS:
601 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
602 break;
603 default:
604 rc = sysfs_create_group(&ipl_kset->kobj,
605 &ipl_unknown_attr_group);
606 break;
607 }
608out:
609 if (rc)
610 panic("ipl_init failed: rc = %i\n", rc);
611
612 return 0;
613}
614
2bc89b5e
HC		 615static struct shutdown_action __refdata ipl_action = {
616 .name = SHUTDOWN_ACTION_IPL_STR,
617 .fn = ipl_run,
618 .init = ipl_init,
619};
99ca4e58 620
ff6b8ea6 621/*
99ca4e58 622 * reipl shutdown action: Reboot Linux on shutdown.
ff6b8ea6
MH		 623 */
624
a0443fbb
HB		 625/* VM IPL PARM attributes */
626static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
627 char *page)
628{
629 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
630
684d2fd4 631 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
a0443fbb
HB		 632 return sprintf(page, "%s\n", vmparm);
633}
634
635static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
636 size_t vmparm_max,
637 const char *buf, size_t len)
638{
639 int i, ip_len;
640
641 /* ignore trailing newline */
642 ip_len = len;
643 if ((len > 0) && (buf[len - 1] == '\n'))
644 ip_len--;
645
646 if (ip_len > vmparm_max)
647 return -EINVAL;
648
649 /* parm is used to store kernel options, check for common chars */
650 for (i = 0; i < ip_len; i++)
651 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
652 return -EINVAL;
653
654 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
655 ipb->ipl_info.ccw.vm_parm_len = ip_len;
656 if (ip_len > 0) {
657 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
658 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
659 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
660 } else {
661 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
662 }
663
664 return len;
665}
666
667/* NSS wrapper */
668static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
669 struct kobj_attribute *attr, char *page)
670{
671 return reipl_generic_vmparm_show(reipl_block_nss, page);
672}
673
674static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
675 struct kobj_attribute *attr,
676 const char *buf, size_t len)
677{
678 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
679}
680
681/* CCW wrapper */
682static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
683 struct kobj_attribute *attr, char *page)
684{
685 return reipl_generic_vmparm_show(reipl_block_ccw, page);
686}
687
688static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
689 struct kobj_attribute *attr,
690 const char *buf, size_t len)
691{
692 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
693}
694
695static struct kobj_attribute sys_reipl_nss_vmparm_attr =
696 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
697 reipl_nss_vmparm_store);
698static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
699 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
700 reipl_ccw_vmparm_store);
701
ff6b8ea6
MH		 702/* FCP reipl device attributes */
703
2c3c8bea 704static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
684d2fd4
HB		 705 struct bin_attribute *attr,
706 char *buf, loff_t off, size_t count)
707{
708 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
709 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
710
711 return memory_read_from_buffer(buf, count, &off, scp_data, size);
712}
713
2c3c8bea 714static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
684d2fd4
HB		 715 struct bin_attribute *attr,
716 char *buf, loff_t off, size_t count)
717{
718 size_t padding;
719 size_t scpdata_len;
720
721 if (off < 0)
722 return -EINVAL;
723
724 if (off >= DIAG308_SCPDATA_SIZE)
725 return -ENOSPC;
726
727 if (count > DIAG308_SCPDATA_SIZE - off)
728 count = DIAG308_SCPDATA_SIZE - off;
729
730 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
731 scpdata_len = off + count;
732
733 if (scpdata_len % 8) {
734 padding = 8 - (scpdata_len % 8);
735 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
736 0, padding);
737 scpdata_len += padding;
738 }
739
740 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
741 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
742 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
743
744 return count;
745}
746
747static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
748 .attr = {
749 .name = "scp_data",
750 .mode = S_IRUGO | S_IWUSR,
751 },
752 .size = PAGE_SIZE,
753 .read = reipl_fcp_scpdata_read,
754 .write = reipl_fcp_scpdata_write,
755};
756
ff6b8ea6
MH		 757DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
758 reipl_block_fcp->ipl_info.fcp.wwpn);
759DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
760 reipl_block_fcp->ipl_info.fcp.lun);
761DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
762 reipl_block_fcp->ipl_info.fcp.bootprog);
763DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
764 reipl_block_fcp->ipl_info.fcp.br_lba);
765DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
766 reipl_block_fcp->ipl_info.fcp.devno);
767
768static struct attribute *reipl_fcp_attrs[] = {
769 &sys_reipl_fcp_device_attr.attr,
770 &sys_reipl_fcp_wwpn_attr.attr,
771 &sys_reipl_fcp_lun_attr.attr,
772 &sys_reipl_fcp_bootprog_attr.attr,
773 &sys_reipl_fcp_br_lba_attr.attr,
774 NULL,
775};
776
777static struct attribute_group reipl_fcp_attr_group = {
ff6b8ea6
MH		 778 .attrs = reipl_fcp_attrs,
779};
780
781/* CCW reipl device attributes */
782
783DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
784 reipl_block_ccw->ipl_info.ccw.devno);
785
a0443fbb
HB		 786static void reipl_get_ascii_loadparm(char *loadparm,
787 struct ipl_parameter_block *ibp)
03a4d208 788{
a0443fbb 789 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
03a4d208
MH		 790 EBCASC(loadparm, LOADPARM_LEN);
791 loadparm[LOADPARM_LEN] = 0;
1d802e24 792 strim(loadparm);
03a4d208
MH		 793}
794
a0443fbb
HB		 795static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
796 char *page)
03a4d208
MH		 797{
798 char buf[LOADPARM_LEN + 1];
799
a0443fbb 800 reipl_get_ascii_loadparm(buf, ipb);
03a4d208
MH		 801 return sprintf(page, "%s\n", buf);
802}
803
a0443fbb
HB		 804static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
805 const char *buf, size_t len)
03a4d208
MH		 806{
807 int i, lp_len;
808
809 /* ignore trailing newline */
810 lp_len = len;
811 if ((len > 0) && (buf[len - 1] == '\n'))
812 lp_len--;
813 /* loadparm can have max 8 characters and must not start with a blank */
814 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
815 return -EINVAL;
816 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
817 for (i = 0; i < lp_len; i++) {
818 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
819 (buf[i] == '.'))
820 continue;
821 return -EINVAL;
822 }
823 /* initialize loadparm with blanks */
a0443fbb 824 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
03a4d208 825 /* copy and convert to ebcdic */
a0443fbb
HB		 826 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
827 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
03a4d208
MH		 828 return len;
829}
830
a0443fbb
HB		 831/* NSS wrapper */
832static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
833 struct kobj_attribute *attr, char *page)
834{
835 return reipl_generic_loadparm_show(reipl_block_nss, page);
836}
837
838static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
839 struct kobj_attribute *attr,
840 const char *buf, size_t len)
841{
842 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
843}
844
845/* CCW wrapper */
846static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
847 struct kobj_attribute *attr, char *page)
848{
849 return reipl_generic_loadparm_show(reipl_block_ccw, page);
850}
851
852static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
853 struct kobj_attribute *attr,
854 const char *buf, size_t len)
855{
856 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
857}
858
9b949165 859static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
a0443fbb
HB		 860 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
861 reipl_ccw_loadparm_store);
862
863static struct attribute *reipl_ccw_attrs_vm[] = {
864 &sys_reipl_ccw_device_attr.attr,
865 &sys_reipl_ccw_loadparm_attr.attr,
866 &sys_reipl_ccw_vmparm_attr.attr,
867 NULL,
868};
03a4d208 869
a0443fbb 870static struct attribute *reipl_ccw_attrs_lpar[] = {
ff6b8ea6 871 &sys_reipl_ccw_device_attr.attr,
03a4d208 872 &sys_reipl_ccw_loadparm_attr.attr,
ff6b8ea6
MH		 873 NULL,
874};
875
a0443fbb 876static struct attribute_group reipl_ccw_attr_group_vm = {
ff6b8ea6 877 .name = IPL_CCW_STR,
a0443fbb
HB		 878 .attrs = reipl_ccw_attrs_vm,
879};
880
881static struct attribute_group reipl_ccw_attr_group_lpar = {
882 .name = IPL_CCW_STR,
883 .attrs = reipl_ccw_attrs_lpar,
ff6b8ea6
MH		 884};
885
fe355b7f
HY		 886
887/* NSS reipl device attributes */
a0443fbb
HB		 888static void reipl_get_ascii_nss_name(char *dst,
889 struct ipl_parameter_block *ipb)
890{
891 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
892 EBCASC(dst, NSS_NAME_SIZE);
893 dst[NSS_NAME_SIZE] = 0;
894}
895
896static ssize_t reipl_nss_name_show(struct kobject *kobj,
897 struct kobj_attribute *attr, char *page)
898{
899 char nss_name[NSS_NAME_SIZE + 1] = {};
900
901 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
902 return sprintf(page, "%s\n", nss_name);
903}
904
905static ssize_t reipl_nss_name_store(struct kobject *kobj,
906 struct kobj_attribute *attr,
907 const char *buf, size_t len)
908{
909 int nss_len;
910
911 /* ignore trailing newline */
912 nss_len = len;
913 if ((len > 0) && (buf[len - 1] == '\n'))
914 nss_len--;
fe355b7f 915
a0443fbb
HB		 916 if (nss_len > NSS_NAME_SIZE)
917 return -EINVAL;
918
919 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
920 if (nss_len > 0) {
921 reipl_block_nss->ipl_info.ccw.vm_flags |=
922 DIAG308_VM_FLAGS_NSS_VALID;
923 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
924 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
925 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
926 } else {
927 reipl_block_nss->ipl_info.ccw.vm_flags &=
928 ~DIAG308_VM_FLAGS_NSS_VALID;
929 }
930
931 return len;
932}
933
934static struct kobj_attribute sys_reipl_nss_name_attr =
935 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
936 reipl_nss_name_store);
937
938static struct kobj_attribute sys_reipl_nss_loadparm_attr =
939 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
940 reipl_nss_loadparm_store);
fe355b7f
HY		 941
942static struct attribute *reipl_nss_attrs[] = {
943 &sys_reipl_nss_name_attr.attr,
a0443fbb
HB		 944 &sys_reipl_nss_loadparm_attr.attr,
945 &sys_reipl_nss_vmparm_attr.attr,
fe355b7f
HY		 946 NULL,
947};
948
949static struct attribute_group reipl_nss_attr_group = {
950 .name = IPL_NSS_STR,
951 .attrs = reipl_nss_attrs,
952};
953
4857d4bb
MH		 954static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
955{
956 reipl_block_actual = reipl_block;
957 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
958 reipl_block->hdr.len);
959}
960
ff6b8ea6
MH		 961/* reipl type */
962
963static int reipl_set_type(enum ipl_type type)
964{
965 if (!(reipl_capabilities & type))
966 return -EINVAL;
967
968 switch(type) {
969 case IPL_TYPE_CCW:
48657d22
MH		 970 if (diag308_set_works)
971 reipl_method = REIPL_METHOD_CCW_DIAG;
972 else if (MACHINE_IS_VM)
411ed322 973 reipl_method = REIPL_METHOD_CCW_VM;
ff6b8ea6 974 else
411ed322 975 reipl_method = REIPL_METHOD_CCW_CIO;
4857d4bb 976 set_reipl_block_actual(reipl_block_ccw);
ff6b8ea6
MH		 977 break;
978 case IPL_TYPE_FCP:
979 if (diag308_set_works)
411ed322 980 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
ff6b8ea6 981 else if (MACHINE_IS_VM)
411ed322 982 reipl_method = REIPL_METHOD_FCP_RO_VM;
ff6b8ea6 983 else
411ed322 984 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
4857d4bb 985 set_reipl_block_actual(reipl_block_fcp);
411ed322
MH		 986 break;
987 case IPL_TYPE_FCP_DUMP:
988 reipl_method = REIPL_METHOD_FCP_DUMP;
ff6b8ea6 989 break;
fe355b7f 990 case IPL_TYPE_NSS:
a0443fbb
HB		 991 if (diag308_set_works)
992 reipl_method = REIPL_METHOD_NSS_DIAG;
993 else
994 reipl_method = REIPL_METHOD_NSS;
4857d4bb 995 set_reipl_block_actual(reipl_block_nss);
411ed322
MH		 996 break;
997 case IPL_TYPE_UNKNOWN:
998 reipl_method = REIPL_METHOD_DEFAULT;
fe355b7f 999 break;
ff6b8ea6 1000 default:
411ed322 1001 BUG();
ff6b8ea6
MH		 1002 }
1003 reipl_type = type;
1004 return 0;
1005}
1006
9b949165
GKH		 1007static ssize_t reipl_type_show(struct kobject *kobj,
1008 struct kobj_attribute *attr, char *page)
ff6b8ea6
MH		 1009{
1010 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1011}
1012
9b949165
GKH		 1013static ssize_t reipl_type_store(struct kobject *kobj,
1014 struct kobj_attribute *attr,
1015 const char *buf, size_t len)
ff6b8ea6
MH		 1016{
1017 int rc = -EINVAL;
1018
1019 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1020 rc = reipl_set_type(IPL_TYPE_CCW);
1021 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1022 rc = reipl_set_type(IPL_TYPE_FCP);
fe355b7f
HY		 1023 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1024 rc = reipl_set_type(IPL_TYPE_NSS);
ff6b8ea6
MH		 1025 return (rc != 0) ? rc : len;
1026}
1027
9b949165 1028static struct kobj_attribute reipl_type_attr =
99ca4e58 1029 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
ff6b8ea6 1030
d91885be 1031static struct kset *reipl_kset;
684d2fd4 1032static struct kset *reipl_fcp_kset;
ff6b8ea6 1033
a0443fbb
HB		 1034static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1035 const enum ipl_method m)
1036{
1037 char loadparm[LOADPARM_LEN + 1] = {};
1038 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1039 char nss_name[NSS_NAME_SIZE + 1] = {};
1040 size_t pos = 0;
1041
1042 reipl_get_ascii_loadparm(loadparm, ipb);
1043 reipl_get_ascii_nss_name(nss_name, ipb);
684d2fd4 1044 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
a0443fbb
HB		 1045
1046 switch (m) {
1047 case REIPL_METHOD_CCW_VM:
1048 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1049 break;
1050 case REIPL_METHOD_NSS:
1051 pos = sprintf(dst, "IPL %s", nss_name);
1052 break;
1053 default:
1054 break;
1055 }
1056 if (strlen(loadparm) > 0)
1057 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1058 if (strlen(vmparm) > 0)
1059 sprintf(dst + pos, " PARM %s", vmparm);
1060}
1061
2c2df118 1062static void __reipl_run(void *unused)
ff6b8ea6
MH		 1063{
1064 struct ccw_dev_id devid;
a0443fbb 1065 static char buf[128];
ff6b8ea6 1066
ff6b8ea6 1067 switch (reipl_method) {
411ed322 1068 case REIPL_METHOD_CCW_CIO:
ff6b8ea6
MH		 1069 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1070 devid.ssid = 0;
1071 reipl_ccw_dev(&devid);
1072 break;
411ed322 1073 case REIPL_METHOD_CCW_VM:
a0443fbb 1074 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
740b5706 1075 __cpcmd(buf, NULL, 0, NULL);
ff6b8ea6 1076 break;
411ed322 1077 case REIPL_METHOD_CCW_DIAG:
ff6b8ea6
MH		 1078 diag308(DIAG308_SET, reipl_block_ccw);
1079 diag308(DIAG308_IPL, NULL);
1080 break;
411ed322 1081 case REIPL_METHOD_FCP_RW_DIAG:
ff6b8ea6
MH		 1082 diag308(DIAG308_SET, reipl_block_fcp);
1083 diag308(DIAG308_IPL, NULL);
1084 break;
411ed322 1085 case REIPL_METHOD_FCP_RO_DIAG:
ff6b8ea6
MH		 1086 diag308(DIAG308_IPL, NULL);
1087 break;
411ed322 1088 case REIPL_METHOD_FCP_RO_VM:
740b5706 1089 __cpcmd("IPL", NULL, 0, NULL);
ff6b8ea6 1090 break;
a0443fbb
HB		 1091 case REIPL_METHOD_NSS_DIAG:
1092 diag308(DIAG308_SET, reipl_block_nss);
1093 diag308(DIAG308_IPL, NULL);
1094 break;
411ed322 1095 case REIPL_METHOD_NSS:
a0443fbb 1096 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
fe355b7f
HY		 1097 __cpcmd(buf, NULL, 0, NULL);
1098 break;
411ed322 1099 case REIPL_METHOD_DEFAULT:
ff6b8ea6 1100 if (MACHINE_IS_VM)
740b5706 1101 __cpcmd("IPL", NULL, 0, NULL);
ff6b8ea6
MH		 1102 diag308(DIAG308_IPL, NULL);
1103 break;
411ed322 1104 case REIPL_METHOD_FCP_DUMP:
411ed322 1105 break;
ff6b8ea6 1106 }
208e5591 1107 disabled_wait((unsigned long) __builtin_return_address(0));
ff6b8ea6
MH		 1108}
1109
2c2df118
HC		 1110static void reipl_run(struct shutdown_trigger *trigger)
1111{
8b646bd7 1112 smp_call_ipl_cpu(__reipl_run, NULL);
2c2df118
HC		 1113}
1114
a0443fbb 1115static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
ff6b8ea6 1116{
a0443fbb
HB		 1117 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1118 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1119 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1120 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1121}
ff6b8ea6 1122
a0443fbb
HB		 1123static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1124{
1125 /* LOADPARM */
1126 /* check if read scp info worked and set loadparm */
1127 if (sclp_ipl_info.is_valid)
1128 memcpy(ipb->ipl_info.ccw.load_parm,
1129 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1130 else
1131 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1132 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1133 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1134
1135 /* VM PARM */
1136 if (MACHINE_IS_VM && diag308_set_works &&
1137 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1138
1139 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1140 ipb->ipl_info.ccw.vm_parm_len =
1141 ipl_block.ipl_info.ccw.vm_parm_len;
1142 memcpy(ipb->ipl_info.ccw.vm_parm,
1143 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1144 }
ff6b8ea6
MH		 1145}
1146
99ca4e58 1147static int __init reipl_nss_init(void)
ff6b8ea6
MH		 1148{
1149 int rc;
1150
99ca4e58
MH		 1151 if (!MACHINE_IS_VM)
1152 return 0;
a0443fbb
HB		 1153
1154 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1155 if (!reipl_block_nss)
1156 return -ENOMEM;
1157
1158 if (!diag308_set_works)
1159 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1160
99ca4e58 1161 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
fe355b7f
HY		 1162 if (rc)
1163 return rc;
a0443fbb
HB		 1164
1165 reipl_block_ccw_init(reipl_block_nss);
1166 if (ipl_info.type == IPL_TYPE_NSS) {
1167 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1168 ' ', NSS_NAME_SIZE);
1169 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1170 kernel_nss_name, strlen(kernel_nss_name));
1171 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1172 reipl_block_nss->ipl_info.ccw.vm_flags |=
1173 DIAG308_VM_FLAGS_NSS_VALID;
1174
1175 reipl_block_ccw_fill_parms(reipl_block_nss);
1176 }
1177
fe355b7f
HY		 1178 reipl_capabilities |= IPL_TYPE_NSS;
1179 return 0;
1180}
1181
ff6b8ea6
MH		 1182static int __init reipl_ccw_init(void)
1183{
1184 int rc;
1185
1186 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1187 if (!reipl_block_ccw)
1188 return -ENOMEM;
a0443fbb
HB		 1189
1190 if (MACHINE_IS_VM) {
1191 if (!diag308_set_works)
1192 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1193 rc = sysfs_create_group(&reipl_kset->kobj,
1194 &reipl_ccw_attr_group_vm);
1195 } else {
1196 if(!diag308_set_works)
1197 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1198 rc = sysfs_create_group(&reipl_kset->kobj,
1199 &reipl_ccw_attr_group_lpar);
ff6b8ea6 1200 }
a0443fbb
HB		 1201 if (rc)
1202 return rc;
1203
1204 reipl_block_ccw_init(reipl_block_ccw);
1205 if (ipl_info.type == IPL_TYPE_CCW) {
ff6b8ea6 1206 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
a0443fbb
HB		 1207 reipl_block_ccw_fill_parms(reipl_block_ccw);
1208 }
1209
ff6b8ea6
MH		 1210 reipl_capabilities |= IPL_TYPE_CCW;
1211 return 0;
1212}
1213
1214static int __init reipl_fcp_init(void)
1215{
1216 int rc;
1217
008d2d11 1218 if (!diag308_set_works) {
684d2fd4 1219 if (ipl_info.type == IPL_TYPE_FCP) {
008d2d11 1220 make_attrs_ro(reipl_fcp_attrs);
684d2fd4
HB		 1221 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1222 } else
008d2d11
MH		 1223 return 0;
1224 }
ff6b8ea6
MH		 1225
1226 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1227 if (!reipl_block_fcp)
1228 return -ENOMEM;
684d2fd4
HB		 1229
1230 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1231 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1232 &reipl_kset->kobj);
798620fb 1233 if (!reipl_fcp_kset) {
684d2fd4
HB		 1234 free_page((unsigned long) reipl_block_fcp);
1235 return -ENOMEM;
1236 }
1237
1238 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
ff6b8ea6 1239 if (rc) {
684d2fd4
HB		 1240 kset_unregister(reipl_fcp_kset);
1241 free_page((unsigned long) reipl_block_fcp);
ff6b8ea6
MH		 1242 return rc;
1243 }
684d2fd4
HB		 1244
1245 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1246 &sys_reipl_fcp_scp_data_attr);
1247 if (rc) {
1248 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1249 kset_unregister(reipl_fcp_kset);
1250 free_page((unsigned long) reipl_block_fcp);
1251 return rc;
1252 }
1253
1254 if (ipl_info.type == IPL_TYPE_FCP)
ff6b8ea6 1255 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
684d2fd4 1256 else {
ff6b8ea6
MH		 1257 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1258 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1259 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
ff6b8ea6
MH		 1260 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1261 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1262 }
1263 reipl_capabilities |= IPL_TYPE_FCP;
1264 return 0;
1265}
1266
4857d4bb
MH		 1267static int __init reipl_type_init(void)
1268{
1269 enum ipl_type reipl_type = ipl_info.type;
1270 struct ipl_parameter_block *reipl_block;
1271 unsigned long size;
1272
1273 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1274 if (!reipl_block)
1275 goto out;
1276 /*
1277 * If we have an OS info reipl block, this will be used
1278 */
1279 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1280 memcpy(reipl_block_fcp, reipl_block, size);
1281 reipl_type = IPL_TYPE_FCP;
1282 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1283 memcpy(reipl_block_ccw, reipl_block, size);
1284 reipl_type = IPL_TYPE_CCW;
1285 }
1286out:
1287 return reipl_set_type(reipl_type);
1288}
1289
2bc89b5e 1290static int __init reipl_init(void)
ff6b8ea6
MH		 1291{
1292 int rc;
1293
f62ed9e3 1294 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
d91885be
GKH		 1295 if (!reipl_kset)
1296 return -ENOMEM;
1297 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
ff6b8ea6 1298 if (rc) {
d91885be 1299 kset_unregister(reipl_kset);
ff6b8ea6
MH		 1300 return rc;
1301 }
1302 rc = reipl_ccw_init();
1303 if (rc)
1304 return rc;
1305 rc = reipl_fcp_init();
fe355b7f
HY		 1306 if (rc)
1307 return rc;
1308 rc = reipl_nss_init();
ff6b8ea6
MH		 1309 if (rc)
1310 return rc;
4857d4bb 1311 return reipl_type_init();
ff6b8ea6
MH		 1312}
1313
2bc89b5e
HC		 1314static struct shutdown_action __refdata reipl_action = {
1315 .name = SHUTDOWN_ACTION_REIPL_STR,
1316 .fn = reipl_run,
1317 .init = reipl_init,
1318};
99ca4e58
MH		 1319
1320/*
1321 * dump shutdown action: Dump Linux on shutdown.
1322 */
1323
1324/* FCP dump device attributes */
1325
1326DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1327 dump_block_fcp->ipl_info.fcp.wwpn);
1328DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1329 dump_block_fcp->ipl_info.fcp.lun);
1330DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1331 dump_block_fcp->ipl_info.fcp.bootprog);
1332DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1333 dump_block_fcp->ipl_info.fcp.br_lba);
1334DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1335 dump_block_fcp->ipl_info.fcp.devno);
1336
1337static struct attribute *dump_fcp_attrs[] = {
1338 &sys_dump_fcp_device_attr.attr,
1339 &sys_dump_fcp_wwpn_attr.attr,
1340 &sys_dump_fcp_lun_attr.attr,
1341 &sys_dump_fcp_bootprog_attr.attr,
1342 &sys_dump_fcp_br_lba_attr.attr,
1343 NULL,
1344};
1345
1346static struct attribute_group dump_fcp_attr_group = {
1347 .name = IPL_FCP_STR,
1348 .attrs = dump_fcp_attrs,
1349};
1350
1351/* CCW dump device attributes */
1352
1353DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1354 dump_block_ccw->ipl_info.ccw.devno);
1355
1356static struct attribute *dump_ccw_attrs[] = {
1357 &sys_dump_ccw_device_attr.attr,
1358 NULL,
1359};
1360
1361static struct attribute_group dump_ccw_attr_group = {
1362 .name = IPL_CCW_STR,
1363 .attrs = dump_ccw_attrs,
1364};
1365
1366/* dump type */
1367
1368static int dump_set_type(enum dump_type type)
1369{
1370 if (!(dump_capabilities & type))
1371 return -EINVAL;
1372 switch (type) {
1373 case DUMP_TYPE_CCW:
48657d22
MH		 1374 if (diag308_set_works)
1375 dump_method = DUMP_METHOD_CCW_DIAG;
1376 else if (MACHINE_IS_VM)
99ca4e58
MH		 1377 dump_method = DUMP_METHOD_CCW_VM;
1378 else
1379 dump_method = DUMP_METHOD_CCW_CIO;
1380 break;
1381 case DUMP_TYPE_FCP:
1382 dump_method = DUMP_METHOD_FCP_DIAG;
1383 break;
1384 default:
1385 dump_method = DUMP_METHOD_NONE;
1386 }
1387 dump_type = type;
1388 return 0;
1389}
1390
1391static ssize_t dump_type_show(struct kobject *kobj,
1392 struct kobj_attribute *attr, char *page)
1393{
1394 return sprintf(page, "%s\n", dump_type_str(dump_type));
1395}
1396
1397static ssize_t dump_type_store(struct kobject *kobj,
1398 struct kobj_attribute *attr,
1399 const char *buf, size_t len)
1400{
1401 int rc = -EINVAL;
1402
1403 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1404 rc = dump_set_type(DUMP_TYPE_NONE);
1405 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1406 rc = dump_set_type(DUMP_TYPE_CCW);
1407 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1408 rc = dump_set_type(DUMP_TYPE_FCP);
1409 return (rc != 0) ? rc : len;
1410}
1411
1412static struct kobj_attribute dump_type_attr =
1413 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1414
1415static struct kset *dump_kset;
1416
2c2df118 1417static void __dump_run(void *unused)
99ca4e58
MH		 1418{
1419 struct ccw_dev_id devid;
1420 static char buf[100];
1421
1422 switch (dump_method) {
1423 case DUMP_METHOD_CCW_CIO:
99ca4e58
MH		 1424 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1425 devid.ssid = 0;
1426 reipl_ccw_dev(&devid);
1427 break;
1428 case DUMP_METHOD_CCW_VM:
99ca4e58
MH		 1429 sprintf(buf, "STORE STATUS");
1430 __cpcmd(buf, NULL, 0, NULL);
1431 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1432 __cpcmd(buf, NULL, 0, NULL);
1433 break;
1434 case DUMP_METHOD_CCW_DIAG:
1435 diag308(DIAG308_SET, dump_block_ccw);
1436 diag308(DIAG308_DUMP, NULL);
1437 break;
1438 case DUMP_METHOD_FCP_DIAG:
1439 diag308(DIAG308_SET, dump_block_fcp);
1440 diag308(DIAG308_DUMP, NULL);
1441 break;
2c2df118
HC		 1442 default:
1443 break;
99ca4e58 1444 }
2c2df118
HC		 1445}
1446
1447static void dump_run(struct shutdown_trigger *trigger)
1448{
1449 if (dump_method == DUMP_METHOD_NONE)
1450 return;
1451 smp_send_stop();
8b646bd7 1452 smp_call_ipl_cpu(__dump_run, NULL);
99ca4e58
MH		 1453}
1454
ff6b8ea6
MH		 1455static int __init dump_ccw_init(void)
1456{
1457 int rc;
1458
1459 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1460 if (!dump_block_ccw)
1461 return -ENOMEM;
d91885be 1462 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
ff6b8ea6
MH		 1463 if (rc) {
1464 free_page((unsigned long)dump_block_ccw);
1465 return rc;
1466 }
1467 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1468 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1469 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
ff6b8ea6 1470 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
411ed322 1471 dump_capabilities |= DUMP_TYPE_CCW;
ff6b8ea6
MH		 1472 return 0;
1473}
1474
ff6b8ea6
MH		 1475static int __init dump_fcp_init(void)
1476{
1477 int rc;
1478
05dd2530 1479 if (!sclp_ipl_info.has_dump)
ff6b8ea6
MH		 1480 return 0; /* LDIPL DUMP is not installed */
1481 if (!diag308_set_works)
1482 return 0;
1483 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1484 if (!dump_block_fcp)
1485 return -ENOMEM;
d91885be 1486 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
ff6b8ea6
MH		 1487 if (rc) {
1488 free_page((unsigned long)dump_block_fcp);
1489 return rc;
1490 }
1491 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1492 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1493 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
ff6b8ea6
MH		 1494 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1495 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
411ed322 1496 dump_capabilities |= DUMP_TYPE_FCP;
ff6b8ea6
MH		 1497 return 0;
1498}
1499
2bc89b5e 1500static int __init dump_init(void)
ff6b8ea6
MH		 1501{
1502 int rc;
1503
f62ed9e3 1504 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
d91885be
GKH		 1505 if (!dump_kset)
1506 return -ENOMEM;
99ca4e58 1507 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
ff6b8ea6 1508 if (rc) {
d91885be 1509 kset_unregister(dump_kset);
ff6b8ea6
MH		 1510 return rc;
1511 }
1512 rc = dump_ccw_init();
1513 if (rc)
1514 return rc;
1515 rc = dump_fcp_init();
1516 if (rc)
1517 return rc;
411ed322 1518 dump_set_type(DUMP_TYPE_NONE);
ff6b8ea6
MH		 1519 return 0;
1520}
1521
2bc89b5e
HC		 1522static struct shutdown_action __refdata dump_action = {
1523 .name = SHUTDOWN_ACTION_DUMP_STR,
1524 .fn = dump_run,
1525 .init = dump_init,
1526};
99ca4e58 1527
099b7651
FM		 1528static void dump_reipl_run(struct shutdown_trigger *trigger)
1529{
a7df7a94 1530 unsigned long ipib = (unsigned long) reipl_block_actual;
fbe76568
HC		 1531 unsigned int csum;
1532
1533 csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1534 mem_assign_absolute(S390_lowcore.ipib, ipib);
1535 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
099b7651
FM		 1536 dump_run(trigger);
1537}
1538
1539static int __init dump_reipl_init(void)
1540{
1541 if (!diag308_set_works)
1542 return -EOPNOTSUPP;
1543 else
1544 return 0;
1545}
1546
1547static struct shutdown_action __refdata dump_reipl_action = {
1548 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1549 .fn = dump_reipl_run,
1550 .init = dump_reipl_init,
1551};
1552
99ca4e58
MH		 1553/*
1554 * vmcmd shutdown action: Trigger vm command on shutdown.
1555 */
1556
1557static char vmcmd_on_reboot[128];
1558static char vmcmd_on_panic[128];
1559static char vmcmd_on_halt[128];
1560static char vmcmd_on_poff[128];
7dd6b334 1561static char vmcmd_on_restart[128];
99ca4e58
MH		 1562
1563DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1564DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1565DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1566DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
7dd6b334 1567DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
99ca4e58
MH		 1568
1569static struct attribute *vmcmd_attrs[] = {
1570 &sys_vmcmd_on_reboot_attr.attr,
1571 &sys_vmcmd_on_panic_attr.attr,
1572 &sys_vmcmd_on_halt_attr.attr,
1573 &sys_vmcmd_on_poff_attr.attr,
7dd6b334 1574 &sys_vmcmd_on_restart_attr.attr,
99ca4e58
MH		 1575 NULL,
1576};
1577
1578static struct attribute_group vmcmd_attr_group = {
1579 .attrs = vmcmd_attrs,
1580};
1581
1582static struct kset *vmcmd_kset;
1583
1584static void vmcmd_run(struct shutdown_trigger *trigger)
ff6b8ea6 1585{
8143adaf 1586 char *cmd;
99ca4e58
MH		 1587
1588 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1589 cmd = vmcmd_on_reboot;
1590 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1591 cmd = vmcmd_on_panic;
1592 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1593 cmd = vmcmd_on_halt;
1594 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1595 cmd = vmcmd_on_poff;
7dd6b334
MH		 1596 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1597 cmd = vmcmd_on_restart;
99ca4e58
MH		 1598 else
1599 return;
1600
1601 if (strlen(cmd) == 0)
1602 return;
8143adaf 1603 __cpcmd(cmd, NULL, 0, NULL);
99ca4e58
MH		 1604}
1605
1606static int vmcmd_init(void)
1607{
1608 if (!MACHINE_IS_VM)
b8e660b8 1609 return -EOPNOTSUPP;
99ca4e58
MH		 1610 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1611 if (!vmcmd_kset)
1612 return -ENOMEM;
1613 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1614}
1615
1616static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1617 vmcmd_run, vmcmd_init};
1618
1619/*
1620 * stop shutdown action: Stop Linux on shutdown.
1621 */
1622
1623static void stop_run(struct shutdown_trigger *trigger)
1624{
e1202eda
MH		 1625 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1626 strcmp(trigger->name, ON_RESTART_STR) == 0)
c6547497 1627 disabled_wait((unsigned long) __builtin_return_address(0));
8b646bd7 1628 smp_stop_cpu();
99ca4e58
MH		 1629}
1630
1631static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1632 stop_run, NULL};
1633
1634/* action list */
1635
1636static struct shutdown_action *shutdown_actions_list[] = {
099b7651
FM		 1637 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1638 &vmcmd_action, &stop_action};
99ca4e58
MH		 1639#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1640
1641/*
1642 * Trigger section
1643 */
1644
1645static struct kset *shutdown_actions_kset;
1646
1647static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1648 size_t len)
1649{
1650 int i;
099b7651 1651
99ca4e58 1652 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
099b7651 1653 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
81088819
FM		 1654 if (shutdown_actions_list[i]->init_rc) {
1655 return shutdown_actions_list[i]->init_rc;
1656 } else {
1657 trigger->action = shutdown_actions_list[i];
1658 return len;
1659 }
99ca4e58
MH		 1660 }
1661 }
1662 return -EINVAL;
1663}
1664
1665/* on reipl */
1666
1667static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1668 &reipl_action};
1669
1670static ssize_t on_reboot_show(struct kobject *kobj,
1671 struct kobj_attribute *attr, char *page)
1672{
1673 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1674}
1675
1676static ssize_t on_reboot_store(struct kobject *kobj,
1677 struct kobj_attribute *attr,
1678 const char *buf, size_t len)
1679{
1680 return set_trigger(buf, &on_reboot_trigger, len);
1681}
1682
1683static struct kobj_attribute on_reboot_attr =
1684 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1685
1686static void do_machine_restart(char *__unused)
1687{
1688 smp_send_stop();
1689 on_reboot_trigger.action->fn(&on_reboot_trigger);
1690 reipl_run(NULL);
1691}
1692void (*_machine_restart)(char *command) = do_machine_restart;
1693
1694/* on panic */
1695
1696static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1697
1698static ssize_t on_panic_show(struct kobject *kobj,
1699 struct kobj_attribute *attr, char *page)
1700{
1701 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1702}
1703
1704static ssize_t on_panic_store(struct kobject *kobj,
1705 struct kobj_attribute *attr,
1706 const char *buf, size_t len)
1707{
1708 return set_trigger(buf, &on_panic_trigger, len);
1709}
1710
1711static struct kobj_attribute on_panic_attr =
1712 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1713
1714static void do_panic(void)
1715{
3ab121ab 1716 lgr_info_log();
99ca4e58
MH		 1717 on_panic_trigger.action->fn(&on_panic_trigger);
1718 stop_run(&on_panic_trigger);
1719}
1720
7dd6b334
MH		 1721/* on restart */
1722
1723static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
e1202eda 1724 &stop_action};
7dd6b334
MH		 1725
1726static ssize_t on_restart_show(struct kobject *kobj,
1727 struct kobj_attribute *attr, char *page)
1728{
1729 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1730}
1731
1732static ssize_t on_restart_store(struct kobject *kobj,
1733 struct kobj_attribute *attr,
1734 const char *buf, size_t len)
1735{
1736 return set_trigger(buf, &on_restart_trigger, len);
1737}
1738
1739static struct kobj_attribute on_restart_attr =
1740 __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1741
8b646bd7 1742static void __do_restart(void *ignore)
7dd6b334 1743{
fa7c0043 1744 __arch_local_irq_stosm(0x04); /* enable DAT */
7dd6b334 1745 smp_send_stop();
60a0c68d
MH		 1746#ifdef CONFIG_CRASH_DUMP
1747 crash_kexec(NULL);
1748#endif
7dd6b334
MH		 1749 on_restart_trigger.action->fn(&on_restart_trigger);
1750 stop_run(&on_restart_trigger);
1751}
1752
8b646bd7
MS		 1753void do_restart(void)
1754{
3ab121ab
MH		 1755 tracing_off();
1756 debug_locks_off();
1757 lgr_info_log();
8b646bd7
MS		 1758 smp_call_online_cpu(__do_restart, NULL);
1759}
1760
99ca4e58
MH		 1761/* on halt */
1762
1763static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1764
1765static ssize_t on_halt_show(struct kobject *kobj,
1766 struct kobj_attribute *attr, char *page)
1767{
1768 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1769}
1770
1771static ssize_t on_halt_store(struct kobject *kobj,
1772 struct kobj_attribute *attr,
1773 const char *buf, size_t len)
1774{
1775 return set_trigger(buf, &on_halt_trigger, len);
1776}
1777
1778static struct kobj_attribute on_halt_attr =
1779 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
ff6b8ea6 1780
99ca4e58
MH		 1781
1782static void do_machine_halt(void)
1783{
1784 smp_send_stop();
1785 on_halt_trigger.action->fn(&on_halt_trigger);
1786 stop_run(&on_halt_trigger);
1787}
1788void (*_machine_halt)(void) = do_machine_halt;
1789
1790/* on power off */
1791
1792static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1793
1794static ssize_t on_poff_show(struct kobject *kobj,
1795 struct kobj_attribute *attr, char *page)
1796{
1797 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1798}
1799
1800static ssize_t on_poff_store(struct kobject *kobj,
1801 struct kobj_attribute *attr,
1802 const char *buf, size_t len)
1803{
1804 return set_trigger(buf, &on_poff_trigger, len);
1805}
1806
1807static struct kobj_attribute on_poff_attr =
1808 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1809
1810
1811static void do_machine_power_off(void)
1812{
1813 smp_send_stop();
1814 on_poff_trigger.action->fn(&on_poff_trigger);
1815 stop_run(&on_poff_trigger);
1816}
1817void (*_machine_power_off)(void) = do_machine_power_off;
1818
1819static void __init shutdown_triggers_init(void)
1820{
d91885be 1821 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
f62ed9e3 1822 firmware_kobj);
d91885be 1823 if (!shutdown_actions_kset)
99ca4e58
MH		 1824 goto fail;
1825 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1826 &on_reboot_attr.attr))
1827 goto fail;
1828 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1829 &on_panic_attr.attr))
1830 goto fail;
1831 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1832 &on_halt_attr.attr))
1833 goto fail;
1834 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1835 &on_poff_attr.attr))
1836 goto fail;
7dd6b334
MH		 1837 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1838 &on_restart_attr.attr))
1839 goto fail;
99ca4e58
MH		 1840 return;
1841fail:
1842 panic("shutdown_triggers_init failed\n");
1843}
1844
1845static void __init shutdown_actions_init(void)
1846{
1847 int i;
1848
1849 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1850 if (!shutdown_actions_list[i]->init)
1851 continue;
81088819
FM		 1852 shutdown_actions_list[i]->init_rc =
1853 shutdown_actions_list[i]->init();
ff6b8ea6 1854 }
ff6b8ea6
MH		 1855}
1856
1857static int __init s390_ipl_init(void)
1858{
d09293ae 1859 sclp_get_ipl_info(&sclp_ipl_info);
99ca4e58
MH		 1860 shutdown_actions_init();
1861 shutdown_triggers_init();
ff6b8ea6
MH		 1862 return 0;
1863}
1864
1865__initcall(s390_ipl_init);
15e9b586 1866
99ca4e58
MH		 1867static void __init strncpy_skip_quote(char *dst, char *src, int n)
1868{
1869 int sx, dx;
1870
1871 dx = 0;
1872 for (sx = 0; src[sx] != 0; sx++) {
1873 if (src[sx] == '"')
1874 continue;
1875 dst[dx++] = src[sx];
1876 if (dx >= n)
1877 break;
1878 }
1879}
1880
1881static int __init vmcmd_on_reboot_setup(char *str)
1882{
1883 if (!MACHINE_IS_VM)
1884 return 1;
1885 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1886 vmcmd_on_reboot[127] = 0;
1887 on_reboot_trigger.action = &vmcmd_action;
1888 return 1;
1889}
1890__setup("vmreboot=", vmcmd_on_reboot_setup);
1891
1892static int __init vmcmd_on_panic_setup(char *str)
1893{
1894 if (!MACHINE_IS_VM)
1895 return 1;
1896 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1897 vmcmd_on_panic[127] = 0;
1898 on_panic_trigger.action = &vmcmd_action;
1899 return 1;
1900}
1901__setup("vmpanic=", vmcmd_on_panic_setup);
1902
1903static int __init vmcmd_on_halt_setup(char *str)
1904{
1905 if (!MACHINE_IS_VM)
1906 return 1;
1907 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1908 vmcmd_on_halt[127] = 0;
1909 on_halt_trigger.action = &vmcmd_action;
1910 return 1;
1911}
1912__setup("vmhalt=", vmcmd_on_halt_setup);
1913
1914static int __init vmcmd_on_poff_setup(char *str)
1915{
1916 if (!MACHINE_IS_VM)
1917 return 1;
1918 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1919 vmcmd_on_poff[127] = 0;
1920 on_poff_trigger.action = &vmcmd_action;
1921 return 1;
1922}
1923__setup("vmpoff=", vmcmd_on_poff_setup);
1924
1925static int on_panic_notify(struct notifier_block *self,
1926 unsigned long event, void *data)
1927{
1928 do_panic();
1929 return NOTIFY_OK;
1930}
1931
1932static struct notifier_block on_panic_nb = {
1933 .notifier_call = on_panic_notify,
7e9b580e 1934 .priority = INT_MIN,
99ca4e58
MH		 1935};
1936
1937void __init setup_ipl(void)
1938{
1939 ipl_info.type = get_ipl_type();
1940 switch (ipl_info.type) {
1941 case IPL_TYPE_CCW:
1942 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1943 ipl_info.data.ccw.dev_id.ssid = 0;
1944 break;
1945 case IPL_TYPE_FCP:
1946 case IPL_TYPE_FCP_DUMP:
1947 ipl_info.data.fcp.dev_id.devno =
1948 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1949 ipl_info.data.fcp.dev_id.ssid = 0;
1950 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1951 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1952 break;
1953 case IPL_TYPE_NSS:
1954 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1955 sizeof(ipl_info.data.nss.name));
1956 break;
1957 case IPL_TYPE_UNKNOWN:
99ca4e58
MH		 1958 /* We have no info to copy */
1959 break;
1960 }
1961 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1962}
1963
a0443fbb
HB		 1964void __init ipl_update_parameters(void)
1965{
3a95e8eb
MH		 1966 int rc;
1967
1968 rc = diag308(DIAG308_STORE, &ipl_block);
1969 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
a0443fbb
HB		 1970 diag308_set_works = 1;
1971}
1972
6fc321fd
HC		 1973void __init ipl_save_parameters(void)
1974{
1975 struct cio_iplinfo iplinfo;
6fc321fd
HC		 1976 void *src, *dst;
1977
1978 if (cio_get_iplinfo(&iplinfo))
1979 return;
1980
1981 ipl_devno = iplinfo.devno;
1982 ipl_flags |= IPL_DEVNO_VALID;
1983 if (!iplinfo.is_qdio)
1984 return;
1985 ipl_flags |= IPL_PARMBLOCK_VALID;
cbb870c8 1986 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
6fc321fd
HC		 1987 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1988 memmove(dst, src, PAGE_SIZE);
cbb870c8 1989 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
6fc321fd
HC		 1990}
1991
15e9b586
HC		 1992static LIST_HEAD(rcall);
1993static DEFINE_MUTEX(rcall_mutex);
1994
1995void register_reset_call(struct reset_call *reset)
1996{
1997 mutex_lock(&rcall_mutex);
1998 list_add(&reset->list, &rcall);
1999 mutex_unlock(&rcall_mutex);
2000}
2001EXPORT_SYMBOL_GPL(register_reset_call);
2002
2003void unregister_reset_call(struct reset_call *reset)
2004{
2005 mutex_lock(&rcall_mutex);
2006 list_del(&reset->list);
2007 mutex_unlock(&rcall_mutex);
2008}
2009EXPORT_SYMBOL_GPL(unregister_reset_call);
2010
2011static void do_reset_calls(void)
2012{
2013 struct reset_call *reset;
2014
9dc7356e
MH		 2015#ifdef CONFIG_64BIT
2016 if (diag308_set_works) {
2017 diag308_reset();
2018 return;
2019 }
2020#endif
15e9b586
HC		 2021 list_for_each_entry(reset, &rcall, list)
2022 reset->fn();
2023}
2024
c5dd8586 2025u32 dump_prefix_page;
15e9b586 2026
60a0c68d 2027void s390_reset_system(void (*func)(void *), void *data)
15e9b586
HC		 2028{
2029 struct _lowcore *lc;
2030
15e9b586 2031 lc = (struct _lowcore *)(unsigned long) store_prefix();
a45e1414
MH		 2032
2033 /* Stack for interrupt/machine check handler */
15e9b586
HC		 2034 lc->panic_stack = S390_lowcore.panic_stack;
2035
da1cf23e 2036 /* Save prefix page address for dump case */
c5dd8586 2037 dump_prefix_page = (u32)(unsigned long) lc;
da1cf23e 2038
15e9b586
HC		 2039 /* Disable prefixing */
2040 set_prefix(0);
2041
2042 /* Disable lowcore protection */
2043 __ctl_clear_bit(0,28);
2044
2045 /* Set new machine check handler */
b50511e4 2046 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
15e9b586 2047 S390_lowcore.mcck_new_psw.addr =
ab14de6c 2048 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
a45e1414
MH		 2049
2050 /* Set new program check handler */
b50511e4 2051 S390_lowcore.program_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
a45e1414 2052 S390_lowcore.program_new_psw.addr =
ab14de6c 2053 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
a45e1414 2054
60a0c68d
MH		 2055 /* Store status at absolute zero */
2056 store_status();
2057
15e9b586 2058 do_reset_calls();
60a0c68d
MH		 2059 if (func)
2060 func(data);
15e9b586 2061}
kernel source for telekom puls (alcatel/mediatek)