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[S390] smp: rename and add lowcore defines
[linux-block.git] / arch / s390 / kernel / ipl.c
CommitLineData
ff6b8ea6
MH		 1/*
2 * arch/s390/kernel/ipl.c
3 * ipl/reipl/dump support for Linux on s390.
4 *
99ca4e58 5 * Copyright IBM Corp. 2005,2007
ff6b8ea6
MH		 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/module.h>
13#include <linux/device.h>
14#include <linux/delay.h>
15#include <linux/reboot.h>
03a4d208 16#include <linux/ctype.h>
0788fea4 17#include <linux/fs.h>
46b05d26 18#include <asm/ipl.h>
ff6b8ea6
MH		 19#include <asm/smp.h>
20#include <asm/setup.h>
21#include <asm/cpcmd.h>
22#include <asm/cio.h>
03a4d208 23#include <asm/ebcdic.h>
15e9b586 24#include <asm/reset.h>
ab14de6c 25#include <asm/sclp.h>
3bd5f3ef 26#include <asm/sigp.h>
159d1ff8 27#include <asm/checksum.h>
ff6b8ea6
MH		 28
29#define IPL_PARM_BLOCK_VERSION 0
03a4d208 30
411ed322
MH		 31#define IPL_UNKNOWN_STR "unknown"
32#define IPL_CCW_STR "ccw"
33#define IPL_FCP_STR "fcp"
34#define IPL_FCP_DUMP_STR "fcp_dump"
35#define IPL_NSS_STR "nss"
615b04b3 36
99ca4e58
MH		 37#define DUMP_CCW_STR "ccw"
38#define DUMP_FCP_STR "fcp"
39#define DUMP_NONE_STR "none"
40
41/*
42 * Four shutdown trigger types are supported:
43 * - panic
44 * - halt
45 * - power off
46 * - reipl
47 */
48#define ON_PANIC_STR "on_panic"
49#define ON_HALT_STR "on_halt"
50#define ON_POFF_STR "on_poff"
51#define ON_REIPL_STR "on_reboot"
52
53struct shutdown_action;
54struct shutdown_trigger {
55 char *name;
56 struct shutdown_action *action;
57};
58
59/*
099b7651 60 * The following shutdown action types are supported:
99ca4e58
MH		 61 */
62#define SHUTDOWN_ACTION_IPL_STR "ipl"
63#define SHUTDOWN_ACTION_REIPL_STR "reipl"
64#define SHUTDOWN_ACTION_DUMP_STR "dump"
65#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
66#define SHUTDOWN_ACTION_STOP_STR "stop"
099b7651 67#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
99ca4e58
MH		 68
69struct shutdown_action {
70 char *name;
71 void (*fn) (struct shutdown_trigger *trigger);
72 int (*init) (void);
81088819 73 int init_rc;
99ca4e58
MH		 74};
75
ff6b8ea6
MH		 76static char *ipl_type_str(enum ipl_type type)
77{
78 switch (type) {
ff6b8ea6
MH		 79 case IPL_TYPE_CCW:
80 return IPL_CCW_STR;
81 case IPL_TYPE_FCP:
82 return IPL_FCP_STR;
411ed322
MH		 83 case IPL_TYPE_FCP_DUMP:
84 return IPL_FCP_DUMP_STR;
fe355b7f
HY		 85 case IPL_TYPE_NSS:
86 return IPL_NSS_STR;
ff6b8ea6
MH		 87 case IPL_TYPE_UNKNOWN:
88 default:
89 return IPL_UNKNOWN_STR;
90 }
91}
92
411ed322
MH		 93enum dump_type {
94 DUMP_TYPE_NONE = 1,
95 DUMP_TYPE_CCW = 2,
96 DUMP_TYPE_FCP = 4,
97};
98
411ed322
MH		 99static char *dump_type_str(enum dump_type type)
100{
101 switch (type) {
102 case DUMP_TYPE_NONE:
103 return DUMP_NONE_STR;
104 case DUMP_TYPE_CCW:
105 return DUMP_CCW_STR;
106 case DUMP_TYPE_FCP:
107 return DUMP_FCP_STR;
108 default:
109 return NULL;
110 }
111}
112
113/*
114 * Must be in data section since the bss section
115 * is not cleared when these are accessed.
116 */
117static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
118u32 ipl_flags __attribute__((__section__(".data"))) = 0;
119
ff6b8ea6 120enum ipl_method {
411ed322
MH		 121 REIPL_METHOD_CCW_CIO,
122 REIPL_METHOD_CCW_DIAG,
123 REIPL_METHOD_CCW_VM,
124 REIPL_METHOD_FCP_RO_DIAG,
125 REIPL_METHOD_FCP_RW_DIAG,
126 REIPL_METHOD_FCP_RO_VM,
127 REIPL_METHOD_FCP_DUMP,
128 REIPL_METHOD_NSS,
a0443fbb 129 REIPL_METHOD_NSS_DIAG,
411ed322
MH		 130 REIPL_METHOD_DEFAULT,
131};
132
133enum dump_method {
134 DUMP_METHOD_NONE,
135 DUMP_METHOD_CCW_CIO,
136 DUMP_METHOD_CCW_DIAG,
137 DUMP_METHOD_CCW_VM,
138 DUMP_METHOD_FCP_DIAG,
ff6b8ea6
MH		 139};
140
ff6b8ea6
MH		 141static int diag308_set_works = 0;
142
a0443fbb
HB		 143static struct ipl_parameter_block ipl_block;
144
ff6b8ea6 145static int reipl_capabilities = IPL_TYPE_UNKNOWN;
fe355b7f 146
ff6b8ea6 147static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
411ed322 148static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
ff6b8ea6
MH		 149static struct ipl_parameter_block *reipl_block_fcp;
150static struct ipl_parameter_block *reipl_block_ccw;
a0443fbb 151static struct ipl_parameter_block *reipl_block_nss;
099b7651 152static struct ipl_parameter_block *reipl_block_actual;
fe355b7f 153
411ed322
MH		 154static int dump_capabilities = DUMP_TYPE_NONE;
155static enum dump_type dump_type = DUMP_TYPE_NONE;
156static enum dump_method dump_method = DUMP_METHOD_NONE;
ff6b8ea6
MH		 157static struct ipl_parameter_block *dump_block_fcp;
158static struct ipl_parameter_block *dump_block_ccw;
159
05dd2530
HC		 160static struct sclp_ipl_info sclp_ipl_info;
161
46b05d26 162int diag308(unsigned long subcode, void *addr)
ff6b8ea6 163{
94c12cc7 164 register unsigned long _addr asm("0") = (unsigned long) addr;
ff6b8ea6
MH		 165 register unsigned long _rc asm("1") = 0;
166
94c12cc7
MS		 167 asm volatile(
168 " diag %0,%2,0x308\n"
169 "0:\n"
170 EX_TABLE(0b,0b)
ff6b8ea6 171 : "+d" (_addr), "+d" (_rc)
94c12cc7 172 : "d" (subcode) : "cc", "memory");
ff6b8ea6
MH		 173 return _rc;
174}
411ed322 175EXPORT_SYMBOL_GPL(diag308);
ff6b8ea6
MH		 176
177/* SYSFS */
178
179#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
9b949165
GKH		 180static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
181 struct kobj_attribute *attr, \
ff6b8ea6
MH		 182 char *page) \
183{ \
184 return sprintf(page, _format, _value); \
185} \
9b949165 186static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
ff6b8ea6
MH		 187 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
188
189#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
9b949165
GKH		 190static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
191 struct kobj_attribute *attr, \
ff6b8ea6
MH		 192 char *page) \
193{ \
194 return sprintf(page, _fmt_out, \
195 (unsigned long long) _value); \
196} \
9b949165
GKH		 197static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
198 struct kobj_attribute *attr, \
ff6b8ea6
MH		 199 const char *buf, size_t len) \
200{ \
201 unsigned long long value; \
202 if (sscanf(buf, _fmt_in, &value) != 1) \
203 return -EINVAL; \
204 _value = value; \
205 return len; \
206} \
9b949165 207static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
ff6b8ea6
MH		 208 __ATTR(_name,(S_IRUGO | S_IWUSR), \
209 sys_##_prefix##_##_name##_show, \
210 sys_##_prefix##_##_name##_store);
211
fe355b7f 212#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
9b949165
GKH		 213static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
214 struct kobj_attribute *attr, \
fe355b7f
HY		 215 char *page) \
216{ \
217 return sprintf(page, _fmt_out, _value); \
218} \
9b949165
GKH		 219static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
220 struct kobj_attribute *attr, \
fe355b7f
HY		 221 const char *buf, size_t len) \
222{ \
99ca4e58 223 strncpy(_value, buf, sizeof(_value) - 1); \
1d802e24 224 strim(_value); \
fe355b7f
HY		 225 return len; \
226} \
9b949165 227static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
fe355b7f
HY		 228 __ATTR(_name,(S_IRUGO | S_IWUSR), \
229 sys_##_prefix##_##_name##_show, \
230 sys_##_prefix##_##_name##_store);
231
ff6b8ea6
MH		 232static void make_attrs_ro(struct attribute **attrs)
233{
234 while (*attrs) {
235 (*attrs)->mode = S_IRUGO;
236 attrs++;
237 }
238}
239
240/*
241 * ipl section
242 */
243
411ed322 244static __init enum ipl_type get_ipl_type(void)
ff6b8ea6
MH		 245{
246 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
247
fe355b7f
HY		 248 if (ipl_flags & IPL_NSS_VALID)
249 return IPL_TYPE_NSS;
e87bfe51 250 if (!(ipl_flags & IPL_DEVNO_VALID))
ff6b8ea6 251 return IPL_TYPE_UNKNOWN;
e87bfe51 252 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
ff6b8ea6
MH		 253 return IPL_TYPE_CCW;
254 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
255 return IPL_TYPE_UNKNOWN;
256 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
257 return IPL_TYPE_UNKNOWN;
411ed322
MH		 258 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
259 return IPL_TYPE_FCP_DUMP;
ff6b8ea6
MH		 260 return IPL_TYPE_FCP;
261}
262
411ed322
MH		 263struct ipl_info ipl_info;
264EXPORT_SYMBOL_GPL(ipl_info);
265
9b949165
GKH		 266static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
267 char *page)
ff6b8ea6 268{
411ed322 269 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
ff6b8ea6
MH		 270}
271
9b949165 272static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
ff6b8ea6 273
a0443fbb 274/* VM IPL PARM routines */
684d2fd4 275size_t reipl_get_ascii_vmparm(char *dest, size_t size,
a0443fbb
HB		 276 const struct ipl_parameter_block *ipb)
277{
278 int i;
684d2fd4 279 size_t len;
a0443fbb
HB		 280 char has_lowercase = 0;
281
684d2fd4 282 len = 0;
a0443fbb
HB		 283 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
284 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
285
684d2fd4 286 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
a0443fbb
HB		 287 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
288 /* If at least one character is lowercase, we assume mixed
289 * case; otherwise we convert everything to lowercase.
290 */
291 for (i = 0; i < len; i++)
292 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
293 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
294 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
295 has_lowercase = 1;
296 break;
297 }
298 if (!has_lowercase)
299 EBC_TOLOWER(dest, len);
300 EBCASC(dest, len);
301 }
302 dest[len] = 0;
684d2fd4
HB		 303
304 return len;
a0443fbb
HB		 305}
306
684d2fd4 307size_t append_ipl_vmparm(char *dest, size_t size)
a0443fbb 308{
684d2fd4
HB		 309 size_t rc;
310
311 rc = 0;
a0443fbb 312 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
684d2fd4 313 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
a0443fbb
HB		 314 else
315 dest[0] = 0;
684d2fd4 316 return rc;
a0443fbb
HB		 317}
318
319static ssize_t ipl_vm_parm_show(struct kobject *kobj,
320 struct kobj_attribute *attr, char *page)
321{
322 char parm[DIAG308_VMPARM_SIZE + 1] = {};
323
684d2fd4 324 append_ipl_vmparm(parm, sizeof(parm));
a0443fbb
HB		 325 return sprintf(page, "%s\n", parm);
326}
327
684d2fd4
HB		 328static size_t scpdata_length(const char* buf, size_t count)
329{
330 while (count) {
331 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
332 break;
333 count--;
334 }
335 return count;
336}
337
338size_t reipl_append_ascii_scpdata(char *dest, size_t size,
339 const struct ipl_parameter_block *ipb)
340{
341 size_t count;
342 size_t i;
18d00acf 343 int has_lowercase;
684d2fd4
HB		 344
345 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
346 ipb->ipl_info.fcp.scp_data_len));
347 if (!count)
348 goto out;
349
18d00acf
HB		 350 has_lowercase = 0;
351 for (i = 0; i < count; i++) {
684d2fd4
HB		 352 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
353 count = 0;
354 goto out;
355 }
18d00acf
HB		 356 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
357 has_lowercase = 1;
358 }
684d2fd4 359
18d00acf
HB		 360 if (has_lowercase)
361 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
362 else
363 for (i = 0; i < count; i++)
364 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
684d2fd4
HB		 365out:
366 dest[count] = '\0';
367 return count;
368}
369
370size_t append_ipl_scpdata(char *dest, size_t len)
371{
372 size_t rc;
373
374 rc = 0;
375 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
376 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
377 else
378 dest[0] = 0;
379 return rc;
380}
381
382
a0443fbb
HB		 383static struct kobj_attribute sys_ipl_vm_parm_attr =
384 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
385
9b949165
GKH		 386static ssize_t sys_ipl_device_show(struct kobject *kobj,
387 struct kobj_attribute *attr, char *page)
ff6b8ea6
MH		 388{
389 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
390
411ed322 391 switch (ipl_info.type) {
ff6b8ea6
MH		 392 case IPL_TYPE_CCW:
393 return sprintf(page, "0.0.%04x\n", ipl_devno);
394 case IPL_TYPE_FCP:
411ed322 395 case IPL_TYPE_FCP_DUMP:
ff6b8ea6
MH		 396 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
397 default:
398 return 0;
399 }
400}
401
9b949165 402static struct kobj_attribute sys_ipl_device_attr =
ff6b8ea6
MH		 403 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
404
05bd711e
AV		 405static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr,
406 char *buf, loff_t off, size_t count)
ff6b8ea6 407{
0788fea4
AM		 408 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
409 IPL_PARMBLOCK_SIZE);
ff6b8ea6
MH		 410}
411
412static struct bin_attribute ipl_parameter_attr = {
413 .attr = {
414 .name = "binary_parameter",
415 .mode = S_IRUGO,
ff6b8ea6
MH		 416 },
417 .size = PAGE_SIZE,
418 .read = &ipl_parameter_read,
419};
420
05bd711e
AV		 421static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr,
422 char *buf, loff_t off, size_t count)
ff6b8ea6
MH		 423{
424 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
425 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
426
0788fea4 427 return memory_read_from_buffer(buf, count, &off, scp_data, size);
ff6b8ea6
MH		 428}
429
430static struct bin_attribute ipl_scp_data_attr = {
431 .attr = {
432 .name = "scp_data",
433 .mode = S_IRUGO,
ff6b8ea6
MH		 434 },
435 .size = PAGE_SIZE,
05bd711e 436 .read = ipl_scp_data_read,
ff6b8ea6
MH		 437};
438
439/* FCP ipl device attributes */
440
441DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
442 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
443DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
444 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
445DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
446 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
447DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
448 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
449
450static struct attribute *ipl_fcp_attrs[] = {
451 &sys_ipl_type_attr.attr,
452 &sys_ipl_device_attr.attr,
453 &sys_ipl_fcp_wwpn_attr.attr,
454 &sys_ipl_fcp_lun_attr.attr,
455 &sys_ipl_fcp_bootprog_attr.attr,
456 &sys_ipl_fcp_br_lba_attr.attr,
457 NULL,
458};
459
460static struct attribute_group ipl_fcp_attr_group = {
461 .attrs = ipl_fcp_attrs,
462};
463
464/* CCW ipl device attributes */
465
9b949165
GKH		 466static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
467 struct kobj_attribute *attr, char *page)
03a4d208
MH		 468{
469 char loadparm[LOADPARM_LEN + 1] = {};
470
05dd2530 471 if (!sclp_ipl_info.is_valid)
03a4d208 472 return sprintf(page, "#unknown#\n");
05dd2530 473 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
03a4d208 474 EBCASC(loadparm, LOADPARM_LEN);
1d802e24 475 strim(loadparm);
03a4d208
MH		 476 return sprintf(page, "%s\n", loadparm);
477}
478
9b949165 479static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
03a4d208
MH		 480 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
481
a0443fbb
HB		 482static struct attribute *ipl_ccw_attrs_vm[] = {
483 &sys_ipl_type_attr.attr,
484 &sys_ipl_device_attr.attr,
485 &sys_ipl_ccw_loadparm_attr.attr,
486 &sys_ipl_vm_parm_attr.attr,
487 NULL,
488};
489
490static struct attribute *ipl_ccw_attrs_lpar[] = {
ff6b8ea6
MH		 491 &sys_ipl_type_attr.attr,
492 &sys_ipl_device_attr.attr,
03a4d208 493 &sys_ipl_ccw_loadparm_attr.attr,
ff6b8ea6
MH		 494 NULL,
495};
496
a0443fbb
HB		 497static struct attribute_group ipl_ccw_attr_group_vm = {
498 .attrs = ipl_ccw_attrs_vm,
499};
500
501static struct attribute_group ipl_ccw_attr_group_lpar = {
502 .attrs = ipl_ccw_attrs_lpar
ff6b8ea6
MH		 503};
504
fe355b7f
HY		 505/* NSS ipl device attributes */
506
507DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
508
509static struct attribute *ipl_nss_attrs[] = {
510 &sys_ipl_type_attr.attr,
511 &sys_ipl_nss_name_attr.attr,
a0443fbb
HB		 512 &sys_ipl_ccw_loadparm_attr.attr,
513 &sys_ipl_vm_parm_attr.attr,
fe355b7f
HY		 514 NULL,
515};
516
517static struct attribute_group ipl_nss_attr_group = {
518 .attrs = ipl_nss_attrs,
519};
520
ff6b8ea6
MH		 521/* UNKNOWN ipl device attributes */
522
523static struct attribute *ipl_unknown_attrs[] = {
524 &sys_ipl_type_attr.attr,
525 NULL,
526};
527
528static struct attribute_group ipl_unknown_attr_group = {
529 .attrs = ipl_unknown_attrs,
530};
531
d91885be 532static struct kset *ipl_kset;
ff6b8ea6 533
99ca4e58
MH		 534static int __init ipl_register_fcp_files(void)
535{
536 int rc;
537
538 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
539 if (rc)
540 goto out;
541 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
542 if (rc)
543 goto out_ipl_parm;
544 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
545 if (!rc)
546 goto out;
547
548 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
549
550out_ipl_parm:
551 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
552out:
553 return rc;
554}
555
556static void ipl_run(struct shutdown_trigger *trigger)
557{
558 diag308(DIAG308_IPL, NULL);
559 if (MACHINE_IS_VM)
560 __cpcmd("IPL", NULL, 0, NULL);
561 else if (ipl_info.type == IPL_TYPE_CCW)
562 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
563}
564
2bc89b5e 565static int __init ipl_init(void)
99ca4e58
MH		 566{
567 int rc;
568
569 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
570 if (!ipl_kset) {
571 rc = -ENOMEM;
572 goto out;
573 }
574 switch (ipl_info.type) {
575 case IPL_TYPE_CCW:
a0443fbb
HB		 576 if (MACHINE_IS_VM)
577 rc = sysfs_create_group(&ipl_kset->kobj,
578 &ipl_ccw_attr_group_vm);
579 else
580 rc = sysfs_create_group(&ipl_kset->kobj,
581 &ipl_ccw_attr_group_lpar);
99ca4e58
MH		 582 break;
583 case IPL_TYPE_FCP:
584 case IPL_TYPE_FCP_DUMP:
585 rc = ipl_register_fcp_files();
586 break;
587 case IPL_TYPE_NSS:
588 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
589 break;
590 default:
591 rc = sysfs_create_group(&ipl_kset->kobj,
592 &ipl_unknown_attr_group);
593 break;
594 }
595out:
596 if (rc)
597 panic("ipl_init failed: rc = %i\n", rc);
598
599 return 0;
600}
601
2bc89b5e
HC		 602static struct shutdown_action __refdata ipl_action = {
603 .name = SHUTDOWN_ACTION_IPL_STR,
604 .fn = ipl_run,
605 .init = ipl_init,
606};
99ca4e58 607
ff6b8ea6 608/*
99ca4e58 609 * reipl shutdown action: Reboot Linux on shutdown.
ff6b8ea6
MH		 610 */
611
a0443fbb
HB		 612/* VM IPL PARM attributes */
613static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
614 char *page)
615{
616 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
617
684d2fd4 618 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
a0443fbb
HB		 619 return sprintf(page, "%s\n", vmparm);
620}
621
622static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
623 size_t vmparm_max,
624 const char *buf, size_t len)
625{
626 int i, ip_len;
627
628 /* ignore trailing newline */
629 ip_len = len;
630 if ((len > 0) && (buf[len - 1] == '\n'))
631 ip_len--;
632
633 if (ip_len > vmparm_max)
634 return -EINVAL;
635
636 /* parm is used to store kernel options, check for common chars */
637 for (i = 0; i < ip_len; i++)
638 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
639 return -EINVAL;
640
641 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
642 ipb->ipl_info.ccw.vm_parm_len = ip_len;
643 if (ip_len > 0) {
644 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
645 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
646 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
647 } else {
648 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
649 }
650
651 return len;
652}
653
654/* NSS wrapper */
655static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
656 struct kobj_attribute *attr, char *page)
657{
658 return reipl_generic_vmparm_show(reipl_block_nss, page);
659}
660
661static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
662 struct kobj_attribute *attr,
663 const char *buf, size_t len)
664{
665 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
666}
667
668/* CCW wrapper */
669static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
670 struct kobj_attribute *attr, char *page)
671{
672 return reipl_generic_vmparm_show(reipl_block_ccw, page);
673}
674
675static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
676 struct kobj_attribute *attr,
677 const char *buf, size_t len)
678{
679 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
680}
681
682static struct kobj_attribute sys_reipl_nss_vmparm_attr =
683 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
684 reipl_nss_vmparm_store);
685static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
686 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
687 reipl_ccw_vmparm_store);
688
ff6b8ea6
MH		 689/* FCP reipl device attributes */
690
684d2fd4
HB		 691static ssize_t reipl_fcp_scpdata_read(struct kobject *kobj,
692 struct bin_attribute *attr,
693 char *buf, loff_t off, size_t count)
694{
695 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
696 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
697
698 return memory_read_from_buffer(buf, count, &off, scp_data, size);
699}
700
701static ssize_t reipl_fcp_scpdata_write(struct kobject *kobj,
702 struct bin_attribute *attr,
703 char *buf, loff_t off, size_t count)
704{
705 size_t padding;
706 size_t scpdata_len;
707
708 if (off < 0)
709 return -EINVAL;
710
711 if (off >= DIAG308_SCPDATA_SIZE)
712 return -ENOSPC;
713
714 if (count > DIAG308_SCPDATA_SIZE - off)
715 count = DIAG308_SCPDATA_SIZE - off;
716
717 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
718 scpdata_len = off + count;
719
720 if (scpdata_len % 8) {
721 padding = 8 - (scpdata_len % 8);
722 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
723 0, padding);
724 scpdata_len += padding;
725 }
726
727 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
728 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
729 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
730
731 return count;
732}
733
734static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
735 .attr = {
736 .name = "scp_data",
737 .mode = S_IRUGO | S_IWUSR,
738 },
739 .size = PAGE_SIZE,
740 .read = reipl_fcp_scpdata_read,
741 .write = reipl_fcp_scpdata_write,
742};
743
ff6b8ea6
MH		 744DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
745 reipl_block_fcp->ipl_info.fcp.wwpn);
746DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
747 reipl_block_fcp->ipl_info.fcp.lun);
748DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
749 reipl_block_fcp->ipl_info.fcp.bootprog);
750DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
751 reipl_block_fcp->ipl_info.fcp.br_lba);
752DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
753 reipl_block_fcp->ipl_info.fcp.devno);
754
755static struct attribute *reipl_fcp_attrs[] = {
756 &sys_reipl_fcp_device_attr.attr,
757 &sys_reipl_fcp_wwpn_attr.attr,
758 &sys_reipl_fcp_lun_attr.attr,
759 &sys_reipl_fcp_bootprog_attr.attr,
760 &sys_reipl_fcp_br_lba_attr.attr,
761 NULL,
762};
763
764static struct attribute_group reipl_fcp_attr_group = {
ff6b8ea6
MH		 765 .attrs = reipl_fcp_attrs,
766};
767
768/* CCW reipl device attributes */
769
770DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
771 reipl_block_ccw->ipl_info.ccw.devno);
772
a0443fbb
HB		 773static void reipl_get_ascii_loadparm(char *loadparm,
774 struct ipl_parameter_block *ibp)
03a4d208 775{
a0443fbb 776 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
03a4d208
MH		 777 EBCASC(loadparm, LOADPARM_LEN);
778 loadparm[LOADPARM_LEN] = 0;
1d802e24 779 strim(loadparm);
03a4d208
MH		 780}
781
a0443fbb
HB		 782static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
783 char *page)
03a4d208
MH		 784{
785 char buf[LOADPARM_LEN + 1];
786
a0443fbb 787 reipl_get_ascii_loadparm(buf, ipb);
03a4d208
MH		 788 return sprintf(page, "%s\n", buf);
789}
790
a0443fbb
HB		 791static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
792 const char *buf, size_t len)
03a4d208
MH		 793{
794 int i, lp_len;
795
796 /* ignore trailing newline */
797 lp_len = len;
798 if ((len > 0) && (buf[len - 1] == '\n'))
799 lp_len--;
800 /* loadparm can have max 8 characters and must not start with a blank */
801 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
802 return -EINVAL;
803 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
804 for (i = 0; i < lp_len; i++) {
805 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
806 (buf[i] == '.'))
807 continue;
808 return -EINVAL;
809 }
810 /* initialize loadparm with blanks */
a0443fbb 811 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
03a4d208 812 /* copy and convert to ebcdic */
a0443fbb
HB		 813 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
814 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
03a4d208
MH		 815 return len;
816}
817
a0443fbb
HB		 818/* NSS wrapper */
819static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
820 struct kobj_attribute *attr, char *page)
821{
822 return reipl_generic_loadparm_show(reipl_block_nss, page);
823}
824
825static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
826 struct kobj_attribute *attr,
827 const char *buf, size_t len)
828{
829 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
830}
831
832/* CCW wrapper */
833static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
834 struct kobj_attribute *attr, char *page)
835{
836 return reipl_generic_loadparm_show(reipl_block_ccw, page);
837}
838
839static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
840 struct kobj_attribute *attr,
841 const char *buf, size_t len)
842{
843 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
844}
845
9b949165 846static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
a0443fbb
HB		 847 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
848 reipl_ccw_loadparm_store);
849
850static struct attribute *reipl_ccw_attrs_vm[] = {
851 &sys_reipl_ccw_device_attr.attr,
852 &sys_reipl_ccw_loadparm_attr.attr,
853 &sys_reipl_ccw_vmparm_attr.attr,
854 NULL,
855};
03a4d208 856
a0443fbb 857static struct attribute *reipl_ccw_attrs_lpar[] = {
ff6b8ea6 858 &sys_reipl_ccw_device_attr.attr,
03a4d208 859 &sys_reipl_ccw_loadparm_attr.attr,
ff6b8ea6
MH		 860 NULL,
861};
862
a0443fbb 863static struct attribute_group reipl_ccw_attr_group_vm = {
ff6b8ea6 864 .name = IPL_CCW_STR,
a0443fbb
HB		 865 .attrs = reipl_ccw_attrs_vm,
866};
867
868static struct attribute_group reipl_ccw_attr_group_lpar = {
869 .name = IPL_CCW_STR,
870 .attrs = reipl_ccw_attrs_lpar,
ff6b8ea6
MH		 871};
872
fe355b7f
HY		 873
874/* NSS reipl device attributes */
a0443fbb
HB		 875static void reipl_get_ascii_nss_name(char *dst,
876 struct ipl_parameter_block *ipb)
877{
878 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
879 EBCASC(dst, NSS_NAME_SIZE);
880 dst[NSS_NAME_SIZE] = 0;
881}
882
883static ssize_t reipl_nss_name_show(struct kobject *kobj,
884 struct kobj_attribute *attr, char *page)
885{
886 char nss_name[NSS_NAME_SIZE + 1] = {};
887
888 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
889 return sprintf(page, "%s\n", nss_name);
890}
891
892static ssize_t reipl_nss_name_store(struct kobject *kobj,
893 struct kobj_attribute *attr,
894 const char *buf, size_t len)
895{
896 int nss_len;
897
898 /* ignore trailing newline */
899 nss_len = len;
900 if ((len > 0) && (buf[len - 1] == '\n'))
901 nss_len--;
fe355b7f 902
a0443fbb
HB		 903 if (nss_len > NSS_NAME_SIZE)
904 return -EINVAL;
905
906 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
907 if (nss_len > 0) {
908 reipl_block_nss->ipl_info.ccw.vm_flags |=
909 DIAG308_VM_FLAGS_NSS_VALID;
910 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
911 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
912 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
913 } else {
914 reipl_block_nss->ipl_info.ccw.vm_flags &=
915 ~DIAG308_VM_FLAGS_NSS_VALID;
916 }
917
918 return len;
919}
920
921static struct kobj_attribute sys_reipl_nss_name_attr =
922 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
923 reipl_nss_name_store);
924
925static struct kobj_attribute sys_reipl_nss_loadparm_attr =
926 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
927 reipl_nss_loadparm_store);
fe355b7f
HY		 928
929static struct attribute *reipl_nss_attrs[] = {
930 &sys_reipl_nss_name_attr.attr,
a0443fbb
HB		 931 &sys_reipl_nss_loadparm_attr.attr,
932 &sys_reipl_nss_vmparm_attr.attr,
fe355b7f
HY		 933 NULL,
934};
935
936static struct attribute_group reipl_nss_attr_group = {
937 .name = IPL_NSS_STR,
938 .attrs = reipl_nss_attrs,
939};
940
ff6b8ea6
MH		 941/* reipl type */
942
943static int reipl_set_type(enum ipl_type type)
944{
945 if (!(reipl_capabilities & type))
946 return -EINVAL;
947
948 switch(type) {
949 case IPL_TYPE_CCW:
48657d22
MH		 950 if (diag308_set_works)
951 reipl_method = REIPL_METHOD_CCW_DIAG;
952 else if (MACHINE_IS_VM)
411ed322 953 reipl_method = REIPL_METHOD_CCW_VM;
ff6b8ea6 954 else
411ed322 955 reipl_method = REIPL_METHOD_CCW_CIO;
099b7651 956 reipl_block_actual = reipl_block_ccw;
ff6b8ea6
MH		 957 break;
958 case IPL_TYPE_FCP:
959 if (diag308_set_works)
411ed322 960 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
ff6b8ea6 961 else if (MACHINE_IS_VM)
411ed322 962 reipl_method = REIPL_METHOD_FCP_RO_VM;
ff6b8ea6 963 else
411ed322 964 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
099b7651 965 reipl_block_actual = reipl_block_fcp;
411ed322
MH		 966 break;
967 case IPL_TYPE_FCP_DUMP:
968 reipl_method = REIPL_METHOD_FCP_DUMP;
ff6b8ea6 969 break;
fe355b7f 970 case IPL_TYPE_NSS:
a0443fbb
HB		 971 if (diag308_set_works)
972 reipl_method = REIPL_METHOD_NSS_DIAG;
973 else
974 reipl_method = REIPL_METHOD_NSS;
099b7651 975 reipl_block_actual = reipl_block_nss;
411ed322
MH		 976 break;
977 case IPL_TYPE_UNKNOWN:
978 reipl_method = REIPL_METHOD_DEFAULT;
fe355b7f 979 break;
ff6b8ea6 980 default:
411ed322 981 BUG();
ff6b8ea6
MH		 982 }
983 reipl_type = type;
984 return 0;
985}
986
9b949165
GKH		 987static ssize_t reipl_type_show(struct kobject *kobj,
988 struct kobj_attribute *attr, char *page)
ff6b8ea6
MH		 989{
990 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
991}
992
9b949165
GKH		 993static ssize_t reipl_type_store(struct kobject *kobj,
994 struct kobj_attribute *attr,
995 const char *buf, size_t len)
ff6b8ea6
MH		 996{
997 int rc = -EINVAL;
998
999 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1000 rc = reipl_set_type(IPL_TYPE_CCW);
1001 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1002 rc = reipl_set_type(IPL_TYPE_FCP);
fe355b7f
HY		 1003 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1004 rc = reipl_set_type(IPL_TYPE_NSS);
ff6b8ea6
MH		 1005 return (rc != 0) ? rc : len;
1006}
1007
9b949165 1008static struct kobj_attribute reipl_type_attr =
99ca4e58 1009 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
ff6b8ea6 1010
d91885be 1011static struct kset *reipl_kset;
684d2fd4 1012static struct kset *reipl_fcp_kset;
ff6b8ea6 1013
a0443fbb
HB		 1014static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1015 const enum ipl_method m)
1016{
1017 char loadparm[LOADPARM_LEN + 1] = {};
1018 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1019 char nss_name[NSS_NAME_SIZE + 1] = {};
1020 size_t pos = 0;
1021
1022 reipl_get_ascii_loadparm(loadparm, ipb);
1023 reipl_get_ascii_nss_name(nss_name, ipb);
684d2fd4 1024 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
a0443fbb
HB		 1025
1026 switch (m) {
1027 case REIPL_METHOD_CCW_VM:
1028 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1029 break;
1030 case REIPL_METHOD_NSS:
1031 pos = sprintf(dst, "IPL %s", nss_name);
1032 break;
1033 default:
1034 break;
1035 }
1036 if (strlen(loadparm) > 0)
1037 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1038 if (strlen(vmparm) > 0)
1039 sprintf(dst + pos, " PARM %s", vmparm);
1040}
1041
a806170e 1042static void reipl_run(struct shutdown_trigger *trigger)
ff6b8ea6
MH		 1043{
1044 struct ccw_dev_id devid;
a0443fbb 1045 static char buf[128];
ff6b8ea6 1046
ff6b8ea6 1047 switch (reipl_method) {
411ed322 1048 case REIPL_METHOD_CCW_CIO:
ff6b8ea6
MH		 1049 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1050 devid.ssid = 0;
1051 reipl_ccw_dev(&devid);
1052 break;
411ed322 1053 case REIPL_METHOD_CCW_VM:
a0443fbb 1054 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
740b5706 1055 __cpcmd(buf, NULL, 0, NULL);
ff6b8ea6 1056 break;
411ed322 1057 case REIPL_METHOD_CCW_DIAG:
ff6b8ea6
MH		 1058 diag308(DIAG308_SET, reipl_block_ccw);
1059 diag308(DIAG308_IPL, NULL);
1060 break;
411ed322 1061 case REIPL_METHOD_FCP_RW_DIAG:
ff6b8ea6
MH		 1062 diag308(DIAG308_SET, reipl_block_fcp);
1063 diag308(DIAG308_IPL, NULL);
1064 break;
411ed322 1065 case REIPL_METHOD_FCP_RO_DIAG:
ff6b8ea6
MH		 1066 diag308(DIAG308_IPL, NULL);
1067 break;
411ed322 1068 case REIPL_METHOD_FCP_RO_VM:
740b5706 1069 __cpcmd("IPL", NULL, 0, NULL);
ff6b8ea6 1070 break;
a0443fbb
HB		 1071 case REIPL_METHOD_NSS_DIAG:
1072 diag308(DIAG308_SET, reipl_block_nss);
1073 diag308(DIAG308_IPL, NULL);
1074 break;
411ed322 1075 case REIPL_METHOD_NSS:
a0443fbb 1076 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
fe355b7f
HY		 1077 __cpcmd(buf, NULL, 0, NULL);
1078 break;
411ed322 1079 case REIPL_METHOD_DEFAULT:
ff6b8ea6 1080 if (MACHINE_IS_VM)
740b5706 1081 __cpcmd("IPL", NULL, 0, NULL);
ff6b8ea6
MH		 1082 diag308(DIAG308_IPL, NULL);
1083 break;
411ed322 1084 case REIPL_METHOD_FCP_DUMP:
411ed322 1085 break;
ff6b8ea6 1086 }
208e5591 1087 disabled_wait((unsigned long) __builtin_return_address(0));
ff6b8ea6
MH		 1088}
1089
a0443fbb 1090static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
ff6b8ea6 1091{
a0443fbb
HB		 1092 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1093 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1094 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1095 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1096}
ff6b8ea6 1097
a0443fbb
HB		 1098static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1099{
1100 /* LOADPARM */
1101 /* check if read scp info worked and set loadparm */
1102 if (sclp_ipl_info.is_valid)
1103 memcpy(ipb->ipl_info.ccw.load_parm,
1104 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1105 else
1106 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1107 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1108 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1109
1110 /* VM PARM */
1111 if (MACHINE_IS_VM && diag308_set_works &&
1112 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1113
1114 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1115 ipb->ipl_info.ccw.vm_parm_len =
1116 ipl_block.ipl_info.ccw.vm_parm_len;
1117 memcpy(ipb->ipl_info.ccw.vm_parm,
1118 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1119 }
ff6b8ea6
MH		 1120}
1121
99ca4e58 1122static int __init reipl_nss_init(void)
ff6b8ea6
MH		 1123{
1124 int rc;
1125
99ca4e58
MH		 1126 if (!MACHINE_IS_VM)
1127 return 0;
a0443fbb
HB		 1128
1129 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1130 if (!reipl_block_nss)
1131 return -ENOMEM;
1132
1133 if (!diag308_set_works)
1134 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1135
99ca4e58 1136 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
fe355b7f
HY		 1137 if (rc)
1138 return rc;
a0443fbb
HB		 1139
1140 reipl_block_ccw_init(reipl_block_nss);
1141 if (ipl_info.type == IPL_TYPE_NSS) {
1142 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1143 ' ', NSS_NAME_SIZE);
1144 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1145 kernel_nss_name, strlen(kernel_nss_name));
1146 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1147 reipl_block_nss->ipl_info.ccw.vm_flags |=
1148 DIAG308_VM_FLAGS_NSS_VALID;
1149
1150 reipl_block_ccw_fill_parms(reipl_block_nss);
1151 }
1152
fe355b7f
HY		 1153 reipl_capabilities |= IPL_TYPE_NSS;
1154 return 0;
1155}
1156
ff6b8ea6
MH		 1157static int __init reipl_ccw_init(void)
1158{
1159 int rc;
1160
1161 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1162 if (!reipl_block_ccw)
1163 return -ENOMEM;
a0443fbb
HB		 1164
1165 if (MACHINE_IS_VM) {
1166 if (!diag308_set_works)
1167 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1168 rc = sysfs_create_group(&reipl_kset->kobj,
1169 &reipl_ccw_attr_group_vm);
1170 } else {
1171 if(!diag308_set_works)
1172 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1173 rc = sysfs_create_group(&reipl_kset->kobj,
1174 &reipl_ccw_attr_group_lpar);
ff6b8ea6 1175 }
a0443fbb
HB		 1176 if (rc)
1177 return rc;
1178
1179 reipl_block_ccw_init(reipl_block_ccw);
1180 if (ipl_info.type == IPL_TYPE_CCW) {
ff6b8ea6 1181 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
a0443fbb
HB		 1182 reipl_block_ccw_fill_parms(reipl_block_ccw);
1183 }
1184
ff6b8ea6
MH		 1185 reipl_capabilities |= IPL_TYPE_CCW;
1186 return 0;
1187}
1188
1189static int __init reipl_fcp_init(void)
1190{
1191 int rc;
1192
008d2d11 1193 if (!diag308_set_works) {
684d2fd4 1194 if (ipl_info.type == IPL_TYPE_FCP) {
008d2d11 1195 make_attrs_ro(reipl_fcp_attrs);
684d2fd4
HB		 1196 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1197 } else
008d2d11
MH		 1198 return 0;
1199 }
ff6b8ea6
MH		 1200
1201 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1202 if (!reipl_block_fcp)
1203 return -ENOMEM;
684d2fd4
HB		 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_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);
ff6b8ea6 1214 if (rc) {
684d2fd4
HB		 1215 kset_unregister(reipl_fcp_kset);
1216 free_page((unsigned long) reipl_block_fcp);
ff6b8ea6
MH		 1217 return rc;
1218 }
684d2fd4
HB		 1219
1220 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1221 &sys_reipl_fcp_scp_data_attr);
1222 if (rc) {
1223 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1224 kset_unregister(reipl_fcp_kset);
1225 free_page((unsigned long) reipl_block_fcp);
1226 return rc;
1227 }
1228
1229 if (ipl_info.type == IPL_TYPE_FCP)
ff6b8ea6 1230 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
684d2fd4 1231 else {
ff6b8ea6
MH		 1232 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1233 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1234 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
ff6b8ea6
MH		 1235 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1236 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1237 }
1238 reipl_capabilities |= IPL_TYPE_FCP;
1239 return 0;
1240}
1241
2bc89b5e 1242static int __init reipl_init(void)
ff6b8ea6
MH		 1243{
1244 int rc;
1245
f62ed9e3 1246 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
d91885be
GKH		 1247 if (!reipl_kset)
1248 return -ENOMEM;
1249 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
ff6b8ea6 1250 if (rc) {
d91885be 1251 kset_unregister(reipl_kset);
ff6b8ea6
MH		 1252 return rc;
1253 }
1254 rc = reipl_ccw_init();
1255 if (rc)
1256 return rc;
1257 rc = reipl_fcp_init();
fe355b7f
HY		 1258 if (rc)
1259 return rc;
1260 rc = reipl_nss_init();
ff6b8ea6
MH		 1261 if (rc)
1262 return rc;
411ed322 1263 rc = reipl_set_type(ipl_info.type);
ff6b8ea6
MH		 1264 if (rc)
1265 return rc;
1266 return 0;
1267}
1268
2bc89b5e
HC		 1269static struct shutdown_action __refdata reipl_action = {
1270 .name = SHUTDOWN_ACTION_REIPL_STR,
1271 .fn = reipl_run,
1272 .init = reipl_init,
1273};
99ca4e58
MH		 1274
1275/*
1276 * dump shutdown action: Dump Linux on shutdown.
1277 */
1278
1279/* FCP dump device attributes */
1280
1281DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1282 dump_block_fcp->ipl_info.fcp.wwpn);
1283DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1284 dump_block_fcp->ipl_info.fcp.lun);
1285DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1286 dump_block_fcp->ipl_info.fcp.bootprog);
1287DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1288 dump_block_fcp->ipl_info.fcp.br_lba);
1289DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1290 dump_block_fcp->ipl_info.fcp.devno);
1291
1292static struct attribute *dump_fcp_attrs[] = {
1293 &sys_dump_fcp_device_attr.attr,
1294 &sys_dump_fcp_wwpn_attr.attr,
1295 &sys_dump_fcp_lun_attr.attr,
1296 &sys_dump_fcp_bootprog_attr.attr,
1297 &sys_dump_fcp_br_lba_attr.attr,
1298 NULL,
1299};
1300
1301static struct attribute_group dump_fcp_attr_group = {
1302 .name = IPL_FCP_STR,
1303 .attrs = dump_fcp_attrs,
1304};
1305
1306/* CCW dump device attributes */
1307
1308DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1309 dump_block_ccw->ipl_info.ccw.devno);
1310
1311static struct attribute *dump_ccw_attrs[] = {
1312 &sys_dump_ccw_device_attr.attr,
1313 NULL,
1314};
1315
1316static struct attribute_group dump_ccw_attr_group = {
1317 .name = IPL_CCW_STR,
1318 .attrs = dump_ccw_attrs,
1319};
1320
1321/* dump type */
1322
1323static int dump_set_type(enum dump_type type)
1324{
1325 if (!(dump_capabilities & type))
1326 return -EINVAL;
1327 switch (type) {
1328 case DUMP_TYPE_CCW:
48657d22
MH		 1329 if (diag308_set_works)
1330 dump_method = DUMP_METHOD_CCW_DIAG;
1331 else if (MACHINE_IS_VM)
99ca4e58
MH		 1332 dump_method = DUMP_METHOD_CCW_VM;
1333 else
1334 dump_method = DUMP_METHOD_CCW_CIO;
1335 break;
1336 case DUMP_TYPE_FCP:
1337 dump_method = DUMP_METHOD_FCP_DIAG;
1338 break;
1339 default:
1340 dump_method = DUMP_METHOD_NONE;
1341 }
1342 dump_type = type;
1343 return 0;
1344}
1345
1346static ssize_t dump_type_show(struct kobject *kobj,
1347 struct kobj_attribute *attr, char *page)
1348{
1349 return sprintf(page, "%s\n", dump_type_str(dump_type));
1350}
1351
1352static ssize_t dump_type_store(struct kobject *kobj,
1353 struct kobj_attribute *attr,
1354 const char *buf, size_t len)
1355{
1356 int rc = -EINVAL;
1357
1358 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1359 rc = dump_set_type(DUMP_TYPE_NONE);
1360 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1361 rc = dump_set_type(DUMP_TYPE_CCW);
1362 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1363 rc = dump_set_type(DUMP_TYPE_FCP);
1364 return (rc != 0) ? rc : len;
1365}
1366
1367static struct kobj_attribute dump_type_attr =
1368 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1369
1370static struct kset *dump_kset;
1371
1372static void dump_run(struct shutdown_trigger *trigger)
1373{
1374 struct ccw_dev_id devid;
1375 static char buf[100];
1376
1377 switch (dump_method) {
1378 case DUMP_METHOD_CCW_CIO:
1379 smp_send_stop();
1380 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1381 devid.ssid = 0;
1382 reipl_ccw_dev(&devid);
1383 break;
1384 case DUMP_METHOD_CCW_VM:
1385 smp_send_stop();
1386 sprintf(buf, "STORE STATUS");
1387 __cpcmd(buf, NULL, 0, NULL);
1388 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1389 __cpcmd(buf, NULL, 0, NULL);
1390 break;
1391 case DUMP_METHOD_CCW_DIAG:
1392 diag308(DIAG308_SET, dump_block_ccw);
1393 diag308(DIAG308_DUMP, NULL);
1394 break;
1395 case DUMP_METHOD_FCP_DIAG:
1396 diag308(DIAG308_SET, dump_block_fcp);
1397 diag308(DIAG308_DUMP, NULL);
1398 break;
1399 case DUMP_METHOD_NONE:
99ca4e58
MH		 1400 return;
1401 }
1402 printk(KERN_EMERG "Dump failed!\n");
1403}
1404
ff6b8ea6
MH		 1405static int __init dump_ccw_init(void)
1406{
1407 int rc;
1408
1409 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1410 if (!dump_block_ccw)
1411 return -ENOMEM;
d91885be 1412 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
ff6b8ea6
MH		 1413 if (rc) {
1414 free_page((unsigned long)dump_block_ccw);
1415 return rc;
1416 }
1417 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1418 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1419 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
ff6b8ea6 1420 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
411ed322 1421 dump_capabilities |= DUMP_TYPE_CCW;
ff6b8ea6
MH		 1422 return 0;
1423}
1424
ff6b8ea6
MH		 1425static int __init dump_fcp_init(void)
1426{
1427 int rc;
1428
05dd2530 1429 if (!sclp_ipl_info.has_dump)
ff6b8ea6
MH		 1430 return 0; /* LDIPL DUMP is not installed */
1431 if (!diag308_set_works)
1432 return 0;
1433 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1434 if (!dump_block_fcp)
1435 return -ENOMEM;
d91885be 1436 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
ff6b8ea6
MH		 1437 if (rc) {
1438 free_page((unsigned long)dump_block_fcp);
1439 return rc;
1440 }
1441 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1442 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1443 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
ff6b8ea6
MH		 1444 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1445 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
411ed322 1446 dump_capabilities |= DUMP_TYPE_FCP;
ff6b8ea6
MH		 1447 return 0;
1448}
1449
2bc89b5e 1450static int __init dump_init(void)
ff6b8ea6
MH		 1451{
1452 int rc;
1453
f62ed9e3 1454 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
d91885be
GKH		 1455 if (!dump_kset)
1456 return -ENOMEM;
99ca4e58 1457 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
ff6b8ea6 1458 if (rc) {
d91885be 1459 kset_unregister(dump_kset);
ff6b8ea6
MH		 1460 return rc;
1461 }
1462 rc = dump_ccw_init();
1463 if (rc)
1464 return rc;
1465 rc = dump_fcp_init();
1466 if (rc)
1467 return rc;
411ed322 1468 dump_set_type(DUMP_TYPE_NONE);
ff6b8ea6
MH		 1469 return 0;
1470}
1471
2bc89b5e
HC		 1472static struct shutdown_action __refdata dump_action = {
1473 .name = SHUTDOWN_ACTION_DUMP_STR,
1474 .fn = dump_run,
1475 .init = dump_init,
1476};
99ca4e58 1477
099b7651
FM		 1478static void dump_reipl_run(struct shutdown_trigger *trigger)
1479{
1480 preempt_disable();
1481 /*
1482 * Bypass dynamic address translation (DAT) when storing IPL parameter
1483 * information block address and checksum into the prefix area
1484 * (corresponding to absolute addresses 0-8191).
1485 * When enhanced DAT applies and the STE format control in one,
1486 * the absolute address is formed without prefixing. In this case a
1487 * normal store (stg/st) into the prefix area would no more match to
1488 * absolute addresses 0-8191.
1489 */
1490#ifdef CONFIG_64BIT
1491 asm volatile("sturg %0,%1"
1492 :: "a" ((unsigned long) reipl_block_actual),
1493 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1494#else
1495 asm volatile("stura %0,%1"
1496 :: "a" ((unsigned long) reipl_block_actual),
1497 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1498#endif
1499 asm volatile("stura %0,%1"
159d1ff8
FM		 1500 :: "a" (csum_partial(reipl_block_actual,
1501 reipl_block_actual->hdr.len, 0)),
099b7651
FM		 1502 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1503 preempt_enable();
1504 dump_run(trigger);
1505}
1506
1507static int __init dump_reipl_init(void)
1508{
1509 if (!diag308_set_works)
1510 return -EOPNOTSUPP;
1511 else
1512 return 0;
1513}
1514
1515static struct shutdown_action __refdata dump_reipl_action = {
1516 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1517 .fn = dump_reipl_run,
1518 .init = dump_reipl_init,
1519};
1520
99ca4e58
MH		 1521/*
1522 * vmcmd shutdown action: Trigger vm command on shutdown.
1523 */
1524
1525static char vmcmd_on_reboot[128];
1526static char vmcmd_on_panic[128];
1527static char vmcmd_on_halt[128];
1528static char vmcmd_on_poff[128];
1529
1530DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1531DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1532DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1533DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1534
1535static struct attribute *vmcmd_attrs[] = {
1536 &sys_vmcmd_on_reboot_attr.attr,
1537 &sys_vmcmd_on_panic_attr.attr,
1538 &sys_vmcmd_on_halt_attr.attr,
1539 &sys_vmcmd_on_poff_attr.attr,
1540 NULL,
1541};
1542
1543static struct attribute_group vmcmd_attr_group = {
1544 .attrs = vmcmd_attrs,
1545};
1546
1547static struct kset *vmcmd_kset;
1548
1549static void vmcmd_run(struct shutdown_trigger *trigger)
ff6b8ea6 1550{
99ca4e58
MH		 1551 char *cmd, *next_cmd;
1552
1553 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1554 cmd = vmcmd_on_reboot;
1555 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1556 cmd = vmcmd_on_panic;
1557 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1558 cmd = vmcmd_on_halt;
1559 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1560 cmd = vmcmd_on_poff;
1561 else
1562 return;
1563
1564 if (strlen(cmd) == 0)
1565 return;
1566 do {
1567 next_cmd = strchr(cmd, '\n');
1568 if (next_cmd) {
1569 next_cmd[0] = 0;
1570 next_cmd += 1;
1571 }
1572 __cpcmd(cmd, NULL, 0, NULL);
1573 cmd = next_cmd;
1574 } while (cmd != NULL);
1575}
1576
1577static int vmcmd_init(void)
1578{
1579 if (!MACHINE_IS_VM)
1580 return -ENOTSUPP;
1581 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1582 if (!vmcmd_kset)
1583 return -ENOMEM;
1584 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1585}
1586
1587static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1588 vmcmd_run, vmcmd_init};
1589
1590/*
1591 * stop shutdown action: Stop Linux on shutdown.
1592 */
1593
1594static void stop_run(struct shutdown_trigger *trigger)
1595{
c6547497
MH		 1596 if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1597 disabled_wait((unsigned long) __builtin_return_address(0));
f8501ba7
HC		 1598 while (signal_processor(smp_processor_id(), sigp_stop) == sigp_busy)
1599 cpu_relax();
1600 for (;;);
99ca4e58
MH		 1601}
1602
1603static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1604 stop_run, NULL};
1605
1606/* action list */
1607
1608static struct shutdown_action *shutdown_actions_list[] = {
099b7651
FM		 1609 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1610 &vmcmd_action, &stop_action};
99ca4e58
MH		 1611#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1612
1613/*
1614 * Trigger section
1615 */
1616
1617static struct kset *shutdown_actions_kset;
1618
1619static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1620 size_t len)
1621{
1622 int i;
099b7651 1623
99ca4e58 1624 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
099b7651 1625 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
81088819
FM		 1626 if (shutdown_actions_list[i]->init_rc) {
1627 return shutdown_actions_list[i]->init_rc;
1628 } else {
1629 trigger->action = shutdown_actions_list[i];
1630 return len;
1631 }
99ca4e58
MH		 1632 }
1633 }
1634 return -EINVAL;
1635}
1636
1637/* on reipl */
1638
1639static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1640 &reipl_action};
1641
1642static ssize_t on_reboot_show(struct kobject *kobj,
1643 struct kobj_attribute *attr, char *page)
1644{
1645 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1646}
1647
1648static ssize_t on_reboot_store(struct kobject *kobj,
1649 struct kobj_attribute *attr,
1650 const char *buf, size_t len)
1651{
1652 return set_trigger(buf, &on_reboot_trigger, len);
1653}
1654
1655static struct kobj_attribute on_reboot_attr =
1656 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1657
1658static void do_machine_restart(char *__unused)
1659{
1660 smp_send_stop();
1661 on_reboot_trigger.action->fn(&on_reboot_trigger);
1662 reipl_run(NULL);
1663}
1664void (*_machine_restart)(char *command) = do_machine_restart;
1665
1666/* on panic */
1667
1668static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1669
1670static ssize_t on_panic_show(struct kobject *kobj,
1671 struct kobj_attribute *attr, char *page)
1672{
1673 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1674}
1675
1676static ssize_t on_panic_store(struct kobject *kobj,
1677 struct kobj_attribute *attr,
1678 const char *buf, size_t len)
1679{
1680 return set_trigger(buf, &on_panic_trigger, len);
1681}
1682
1683static struct kobj_attribute on_panic_attr =
1684 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1685
1686static void do_panic(void)
1687{
1688 on_panic_trigger.action->fn(&on_panic_trigger);
1689 stop_run(&on_panic_trigger);
1690}
1691
1692/* on halt */
1693
1694static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1695
1696static ssize_t on_halt_show(struct kobject *kobj,
1697 struct kobj_attribute *attr, char *page)
1698{
1699 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1700}
1701
1702static ssize_t on_halt_store(struct kobject *kobj,
1703 struct kobj_attribute *attr,
1704 const char *buf, size_t len)
1705{
1706 return set_trigger(buf, &on_halt_trigger, len);
1707}
1708
1709static struct kobj_attribute on_halt_attr =
1710 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
ff6b8ea6 1711
99ca4e58
MH		 1712
1713static void do_machine_halt(void)
1714{
1715 smp_send_stop();
1716 on_halt_trigger.action->fn(&on_halt_trigger);
1717 stop_run(&on_halt_trigger);
1718}
1719void (*_machine_halt)(void) = do_machine_halt;
1720
1721/* on power off */
1722
1723static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1724
1725static ssize_t on_poff_show(struct kobject *kobj,
1726 struct kobj_attribute *attr, char *page)
1727{
1728 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1729}
1730
1731static ssize_t on_poff_store(struct kobject *kobj,
1732 struct kobj_attribute *attr,
1733 const char *buf, size_t len)
1734{
1735 return set_trigger(buf, &on_poff_trigger, len);
1736}
1737
1738static struct kobj_attribute on_poff_attr =
1739 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1740
1741
1742static void do_machine_power_off(void)
1743{
1744 smp_send_stop();
1745 on_poff_trigger.action->fn(&on_poff_trigger);
1746 stop_run(&on_poff_trigger);
1747}
1748void (*_machine_power_off)(void) = do_machine_power_off;
1749
1750static void __init shutdown_triggers_init(void)
1751{
d91885be 1752 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
f62ed9e3 1753 firmware_kobj);
d91885be 1754 if (!shutdown_actions_kset)
99ca4e58
MH		 1755 goto fail;
1756 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1757 &on_reboot_attr.attr))
1758 goto fail;
1759 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1760 &on_panic_attr.attr))
1761 goto fail;
1762 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1763 &on_halt_attr.attr))
1764 goto fail;
1765 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1766 &on_poff_attr.attr))
1767 goto fail;
1768
1769 return;
1770fail:
1771 panic("shutdown_triggers_init failed\n");
1772}
1773
1774static void __init shutdown_actions_init(void)
1775{
1776 int i;
1777
1778 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1779 if (!shutdown_actions_list[i]->init)
1780 continue;
81088819
FM		 1781 shutdown_actions_list[i]->init_rc =
1782 shutdown_actions_list[i]->init();
ff6b8ea6 1783 }
ff6b8ea6
MH		 1784}
1785
1786static int __init s390_ipl_init(void)
1787{
d09293ae 1788 sclp_get_ipl_info(&sclp_ipl_info);
99ca4e58
MH		 1789 shutdown_actions_init();
1790 shutdown_triggers_init();
ff6b8ea6
MH		 1791 return 0;
1792}
1793
1794__initcall(s390_ipl_init);
15e9b586 1795
99ca4e58
MH		 1796static void __init strncpy_skip_quote(char *dst, char *src, int n)
1797{
1798 int sx, dx;
1799
1800 dx = 0;
1801 for (sx = 0; src[sx] != 0; sx++) {
1802 if (src[sx] == '"')
1803 continue;
1804 dst[dx++] = src[sx];
1805 if (dx >= n)
1806 break;
1807 }
1808}
1809
1810static int __init vmcmd_on_reboot_setup(char *str)
1811{
1812 if (!MACHINE_IS_VM)
1813 return 1;
1814 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1815 vmcmd_on_reboot[127] = 0;
1816 on_reboot_trigger.action = &vmcmd_action;
1817 return 1;
1818}
1819__setup("vmreboot=", vmcmd_on_reboot_setup);
1820
1821static int __init vmcmd_on_panic_setup(char *str)
1822{
1823 if (!MACHINE_IS_VM)
1824 return 1;
1825 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1826 vmcmd_on_panic[127] = 0;
1827 on_panic_trigger.action = &vmcmd_action;
1828 return 1;
1829}
1830__setup("vmpanic=", vmcmd_on_panic_setup);
1831
1832static int __init vmcmd_on_halt_setup(char *str)
1833{
1834 if (!MACHINE_IS_VM)
1835 return 1;
1836 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1837 vmcmd_on_halt[127] = 0;
1838 on_halt_trigger.action = &vmcmd_action;
1839 return 1;
1840}
1841__setup("vmhalt=", vmcmd_on_halt_setup);
1842
1843static int __init vmcmd_on_poff_setup(char *str)
1844{
1845 if (!MACHINE_IS_VM)
1846 return 1;
1847 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1848 vmcmd_on_poff[127] = 0;
1849 on_poff_trigger.action = &vmcmd_action;
1850 return 1;
1851}
1852__setup("vmpoff=", vmcmd_on_poff_setup);
1853
1854static int on_panic_notify(struct notifier_block *self,
1855 unsigned long event, void *data)
1856{
1857 do_panic();
1858 return NOTIFY_OK;
1859}
1860
1861static struct notifier_block on_panic_nb = {
1862 .notifier_call = on_panic_notify,
7e9b580e 1863 .priority = INT_MIN,
99ca4e58
MH		 1864};
1865
1866void __init setup_ipl(void)
1867{
1868 ipl_info.type = get_ipl_type();
1869 switch (ipl_info.type) {
1870 case IPL_TYPE_CCW:
1871 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1872 ipl_info.data.ccw.dev_id.ssid = 0;
1873 break;
1874 case IPL_TYPE_FCP:
1875 case IPL_TYPE_FCP_DUMP:
1876 ipl_info.data.fcp.dev_id.devno =
1877 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1878 ipl_info.data.fcp.dev_id.ssid = 0;
1879 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1880 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1881 break;
1882 case IPL_TYPE_NSS:
1883 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1884 sizeof(ipl_info.data.nss.name));
1885 break;
1886 case IPL_TYPE_UNKNOWN:
99ca4e58
MH		 1887 /* We have no info to copy */
1888 break;
1889 }
1890 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1891}
1892
a0443fbb
HB		 1893void __init ipl_update_parameters(void)
1894{
3a95e8eb
MH		 1895 int rc;
1896
1897 rc = diag308(DIAG308_STORE, &ipl_block);
1898 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
a0443fbb
HB		 1899 diag308_set_works = 1;
1900}
1901
6fc321fd
HC		 1902void __init ipl_save_parameters(void)
1903{
1904 struct cio_iplinfo iplinfo;
1905 unsigned int *ipl_ptr;
1906 void *src, *dst;
1907
1908 if (cio_get_iplinfo(&iplinfo))
1909 return;
1910
1911 ipl_devno = iplinfo.devno;
1912 ipl_flags |= IPL_DEVNO_VALID;
1913 if (!iplinfo.is_qdio)
1914 return;
1915 ipl_flags |= IPL_PARMBLOCK_VALID;
1916 ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
1917 src = (void *)(unsigned long)*ipl_ptr;
1918 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1919 memmove(dst, src, PAGE_SIZE);
1920 *ipl_ptr = IPL_PARMBLOCK_ORIGIN;
1921}
1922
15e9b586
HC		 1923static LIST_HEAD(rcall);
1924static DEFINE_MUTEX(rcall_mutex);
1925
1926void register_reset_call(struct reset_call *reset)
1927{
1928 mutex_lock(&rcall_mutex);
1929 list_add(&reset->list, &rcall);
1930 mutex_unlock(&rcall_mutex);
1931}
1932EXPORT_SYMBOL_GPL(register_reset_call);
1933
1934void unregister_reset_call(struct reset_call *reset)
1935{
1936 mutex_lock(&rcall_mutex);
1937 list_del(&reset->list);
1938 mutex_unlock(&rcall_mutex);
1939}
1940EXPORT_SYMBOL_GPL(unregister_reset_call);
1941
1942static void do_reset_calls(void)
1943{
1944 struct reset_call *reset;
1945
1946 list_for_each_entry(reset, &rcall, list)
1947 reset->fn();
1948}
1949
c5dd8586 1950u32 dump_prefix_page;
15e9b586
HC		 1951
1952void s390_reset_system(void)
1953{
1954 struct _lowcore *lc;
1955
15e9b586 1956 lc = (struct _lowcore *)(unsigned long) store_prefix();
a45e1414
MH		 1957
1958 /* Stack for interrupt/machine check handler */
15e9b586
HC		 1959 lc->panic_stack = S390_lowcore.panic_stack;
1960
da1cf23e 1961 /* Save prefix page address for dump case */
c5dd8586 1962 dump_prefix_page = (u32)(unsigned long) lc;
da1cf23e 1963
15e9b586
HC		 1964 /* Disable prefixing */
1965 set_prefix(0);
1966
1967 /* Disable lowcore protection */
1968 __ctl_clear_bit(0,28);
1969
1970 /* Set new machine check handler */
c1821c2e 1971 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
15e9b586 1972 S390_lowcore.mcck_new_psw.addr =
ab14de6c 1973 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
a45e1414
MH		 1974
1975 /* Set new program check handler */
c1821c2e 1976 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
a45e1414 1977 S390_lowcore.program_new_psw.addr =
ab14de6c 1978 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
a45e1414 1979
15e9b586
HC		 1980 do_reset_calls();
1981}
99ca4e58 1982
Linux 6.x block layer and io_uring tree(s)