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[S390] Extra Kernel Parameters via VMPARM
[net-next-2.6.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>
46b05d26 17#include <asm/ipl.h>
ff6b8ea6
MH		 18#include <asm/smp.h>
19#include <asm/setup.h>
20#include <asm/cpcmd.h>
21#include <asm/cio.h>
03a4d208 22#include <asm/ebcdic.h>
15e9b586 23#include <asm/reset.h>
ab14de6c 24#include <asm/sclp.h>
a0443fbb 25#include <asm/setup.h>
ff6b8ea6
MH		 26
27#define IPL_PARM_BLOCK_VERSION 0
03a4d208 28
411ed322
MH		 29#define IPL_UNKNOWN_STR "unknown"
30#define IPL_CCW_STR "ccw"
31#define IPL_FCP_STR "fcp"
32#define IPL_FCP_DUMP_STR "fcp_dump"
33#define IPL_NSS_STR "nss"
615b04b3 34
99ca4e58
MH		 35#define DUMP_CCW_STR "ccw"
36#define DUMP_FCP_STR "fcp"
37#define DUMP_NONE_STR "none"
38
39/*
40 * Four shutdown trigger types are supported:
41 * - panic
42 * - halt
43 * - power off
44 * - reipl
45 */
46#define ON_PANIC_STR "on_panic"
47#define ON_HALT_STR "on_halt"
48#define ON_POFF_STR "on_poff"
49#define ON_REIPL_STR "on_reboot"
50
51struct shutdown_action;
52struct shutdown_trigger {
53 char *name;
54 struct shutdown_action *action;
55};
56
57/*
58 * Five shutdown action types are supported:
59 */
60#define SHUTDOWN_ACTION_IPL_STR "ipl"
61#define SHUTDOWN_ACTION_REIPL_STR "reipl"
62#define SHUTDOWN_ACTION_DUMP_STR "dump"
63#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
64#define SHUTDOWN_ACTION_STOP_STR "stop"
65
66struct shutdown_action {
67 char *name;
68 void (*fn) (struct shutdown_trigger *trigger);
69 int (*init) (void);
70};
71
ff6b8ea6
MH		 72static char *ipl_type_str(enum ipl_type type)
73{
74 switch (type) {
ff6b8ea6
MH		 75 case IPL_TYPE_CCW:
76 return IPL_CCW_STR;
77 case IPL_TYPE_FCP:
78 return IPL_FCP_STR;
411ed322
MH		 79 case IPL_TYPE_FCP_DUMP:
80 return IPL_FCP_DUMP_STR;
fe355b7f
HY		 81 case IPL_TYPE_NSS:
82 return IPL_NSS_STR;
ff6b8ea6
MH		 83 case IPL_TYPE_UNKNOWN:
84 default:
85 return IPL_UNKNOWN_STR;
86 }
87}
88
411ed322
MH		 89enum dump_type {
90 DUMP_TYPE_NONE = 1,
91 DUMP_TYPE_CCW = 2,
92 DUMP_TYPE_FCP = 4,
93};
94
411ed322
MH		 95static char *dump_type_str(enum dump_type type)
96{
97 switch (type) {
98 case DUMP_TYPE_NONE:
99 return DUMP_NONE_STR;
100 case DUMP_TYPE_CCW:
101 return DUMP_CCW_STR;
102 case DUMP_TYPE_FCP:
103 return DUMP_FCP_STR;
104 default:
105 return NULL;
106 }
107}
108
109/*
110 * Must be in data section since the bss section
111 * is not cleared when these are accessed.
112 */
113static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
114u32 ipl_flags __attribute__((__section__(".data"))) = 0;
115
ff6b8ea6 116enum ipl_method {
411ed322
MH		 117 REIPL_METHOD_CCW_CIO,
118 REIPL_METHOD_CCW_DIAG,
119 REIPL_METHOD_CCW_VM,
120 REIPL_METHOD_FCP_RO_DIAG,
121 REIPL_METHOD_FCP_RW_DIAG,
122 REIPL_METHOD_FCP_RO_VM,
123 REIPL_METHOD_FCP_DUMP,
124 REIPL_METHOD_NSS,
a0443fbb 125 REIPL_METHOD_NSS_DIAG,
411ed322
MH		 126 REIPL_METHOD_DEFAULT,
127};
128
129enum dump_method {
130 DUMP_METHOD_NONE,
131 DUMP_METHOD_CCW_CIO,
132 DUMP_METHOD_CCW_DIAG,
133 DUMP_METHOD_CCW_VM,
134 DUMP_METHOD_FCP_DIAG,
ff6b8ea6
MH		 135};
136
ff6b8ea6
MH		 137static int diag308_set_works = 0;
138
a0443fbb
HB		 139static struct ipl_parameter_block ipl_block;
140
ff6b8ea6 141static int reipl_capabilities = IPL_TYPE_UNKNOWN;
fe355b7f 142
ff6b8ea6 143static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
411ed322 144static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
ff6b8ea6
MH		 145static struct ipl_parameter_block *reipl_block_fcp;
146static struct ipl_parameter_block *reipl_block_ccw;
a0443fbb 147static struct ipl_parameter_block *reipl_block_nss;
fe355b7f 148
411ed322
MH		 149static int dump_capabilities = DUMP_TYPE_NONE;
150static enum dump_type dump_type = DUMP_TYPE_NONE;
151static enum dump_method dump_method = DUMP_METHOD_NONE;
ff6b8ea6
MH		 152static struct ipl_parameter_block *dump_block_fcp;
153static struct ipl_parameter_block *dump_block_ccw;
154
05dd2530
HC		 155static struct sclp_ipl_info sclp_ipl_info;
156
46b05d26 157int diag308(unsigned long subcode, void *addr)
ff6b8ea6 158{
94c12cc7 159 register unsigned long _addr asm("0") = (unsigned long) addr;
ff6b8ea6
MH		 160 register unsigned long _rc asm("1") = 0;
161
94c12cc7
MS		 162 asm volatile(
163 " diag %0,%2,0x308\n"
164 "0:\n"
165 EX_TABLE(0b,0b)
ff6b8ea6 166 : "+d" (_addr), "+d" (_rc)
94c12cc7 167 : "d" (subcode) : "cc", "memory");
ff6b8ea6
MH		 168 return _rc;
169}
411ed322 170EXPORT_SYMBOL_GPL(diag308);
ff6b8ea6
MH		 171
172/* SYSFS */
173
174#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
9b949165
GKH		 175static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
176 struct kobj_attribute *attr, \
ff6b8ea6
MH		 177 char *page) \
178{ \
179 return sprintf(page, _format, _value); \
180} \
9b949165 181static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
ff6b8ea6
MH		 182 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
183
184#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
9b949165
GKH		 185static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
186 struct kobj_attribute *attr, \
ff6b8ea6
MH		 187 char *page) \
188{ \
189 return sprintf(page, _fmt_out, \
190 (unsigned long long) _value); \
191} \
9b949165
GKH		 192static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
193 struct kobj_attribute *attr, \
ff6b8ea6
MH		 194 const char *buf, size_t len) \
195{ \
196 unsigned long long value; \
197 if (sscanf(buf, _fmt_in, &value) != 1) \
198 return -EINVAL; \
199 _value = value; \
200 return len; \
201} \
9b949165 202static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
ff6b8ea6
MH		 203 __ATTR(_name,(S_IRUGO | S_IWUSR), \
204 sys_##_prefix##_##_name##_show, \
205 sys_##_prefix##_##_name##_store);
206
fe355b7f 207#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
9b949165
GKH		 208static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
209 struct kobj_attribute *attr, \
fe355b7f
HY		 210 char *page) \
211{ \
212 return sprintf(page, _fmt_out, _value); \
213} \
9b949165
GKH		 214static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
215 struct kobj_attribute *attr, \
fe355b7f
HY		 216 const char *buf, size_t len) \
217{ \
99ca4e58
MH		 218 strncpy(_value, buf, sizeof(_value) - 1); \
219 strstrip(_value); \
fe355b7f
HY		 220 return len; \
221} \
9b949165 222static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
fe355b7f
HY		 223 __ATTR(_name,(S_IRUGO | S_IWUSR), \
224 sys_##_prefix##_##_name##_show, \
225 sys_##_prefix##_##_name##_store);
226
ff6b8ea6
MH		 227static void make_attrs_ro(struct attribute **attrs)
228{
229 while (*attrs) {
230 (*attrs)->mode = S_IRUGO;
231 attrs++;
232 }
233}
234
235/*
236 * ipl section
237 */
238
411ed322 239static __init enum ipl_type get_ipl_type(void)
ff6b8ea6
MH		 240{
241 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
242
fe355b7f
HY		 243 if (ipl_flags & IPL_NSS_VALID)
244 return IPL_TYPE_NSS;
e87bfe51 245 if (!(ipl_flags & IPL_DEVNO_VALID))
ff6b8ea6 246 return IPL_TYPE_UNKNOWN;
e87bfe51 247 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
ff6b8ea6
MH		 248 return IPL_TYPE_CCW;
249 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
250 return IPL_TYPE_UNKNOWN;
251 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
252 return IPL_TYPE_UNKNOWN;
411ed322
MH		 253 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
254 return IPL_TYPE_FCP_DUMP;
ff6b8ea6
MH		 255 return IPL_TYPE_FCP;
256}
257
411ed322
MH		 258struct ipl_info ipl_info;
259EXPORT_SYMBOL_GPL(ipl_info);
260
9b949165
GKH		 261static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
262 char *page)
ff6b8ea6 263{
411ed322 264 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
ff6b8ea6
MH		 265}
266
9b949165 267static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
ff6b8ea6 268
a0443fbb
HB		 269/* VM IPL PARM routines */
270static void reipl_get_ascii_vmparm(char *dest,
271 const struct ipl_parameter_block *ipb)
272{
273 int i;
274 int len = 0;
275 char has_lowercase = 0;
276
277 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
278 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
279
280 len = ipb->ipl_info.ccw.vm_parm_len;
281 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
282 /* If at least one character is lowercase, we assume mixed
283 * case; otherwise we convert everything to lowercase.
284 */
285 for (i = 0; i < len; i++)
286 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
287 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
288 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
289 has_lowercase = 1;
290 break;
291 }
292 if (!has_lowercase)
293 EBC_TOLOWER(dest, len);
294 EBCASC(dest, len);
295 }
296 dest[len] = 0;
297}
298
299void get_ipl_vmparm(char *dest)
300{
301 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
302 reipl_get_ascii_vmparm(dest, &ipl_block);
303 else
304 dest[0] = 0;
305}
306
307static ssize_t ipl_vm_parm_show(struct kobject *kobj,
308 struct kobj_attribute *attr, char *page)
309{
310 char parm[DIAG308_VMPARM_SIZE + 1] = {};
311
312 get_ipl_vmparm(parm);
313 return sprintf(page, "%s\n", parm);
314}
315
316static struct kobj_attribute sys_ipl_vm_parm_attr =
317 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
318
9b949165
GKH		 319static ssize_t sys_ipl_device_show(struct kobject *kobj,
320 struct kobj_attribute *attr, char *page)
ff6b8ea6
MH		 321{
322 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
323
411ed322 324 switch (ipl_info.type) {
ff6b8ea6
MH		 325 case IPL_TYPE_CCW:
326 return sprintf(page, "0.0.%04x\n", ipl_devno);
327 case IPL_TYPE_FCP:
411ed322 328 case IPL_TYPE_FCP_DUMP:
ff6b8ea6
MH		 329 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
330 default:
331 return 0;
332 }
333}
334
9b949165 335static struct kobj_attribute sys_ipl_device_attr =
ff6b8ea6
MH		 336 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
337
05bd711e
AV		 338static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr,
339 char *buf, loff_t off, size_t count)
ff6b8ea6
MH		 340{
341 unsigned int size = IPL_PARMBLOCK_SIZE;
342
343 if (off > size)
344 return 0;
345 if (off + count > size)
346 count = size - off;
347 memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count);
348 return count;
349}
350
351static struct bin_attribute ipl_parameter_attr = {
352 .attr = {
353 .name = "binary_parameter",
354 .mode = S_IRUGO,
ff6b8ea6
MH		 355 },
356 .size = PAGE_SIZE,
357 .read = &ipl_parameter_read,
358};
359
05bd711e
AV		 360static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr,
361 char *buf, loff_t off, size_t count)
ff6b8ea6
MH		 362{
363 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
364 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
365
366 if (off > size)
367 return 0;
368 if (off + count > size)
369 count = size - off;
370 memcpy(buf, scp_data + off, count);
371 return count;
372}
373
374static struct bin_attribute ipl_scp_data_attr = {
375 .attr = {
376 .name = "scp_data",
377 .mode = S_IRUGO,
ff6b8ea6
MH		 378 },
379 .size = PAGE_SIZE,
05bd711e 380 .read = ipl_scp_data_read,
ff6b8ea6
MH		 381};
382
383/* FCP ipl device attributes */
384
385DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
386 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
387DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
388 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
389DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
390 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
391DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
392 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
393
394static struct attribute *ipl_fcp_attrs[] = {
395 &sys_ipl_type_attr.attr,
396 &sys_ipl_device_attr.attr,
397 &sys_ipl_fcp_wwpn_attr.attr,
398 &sys_ipl_fcp_lun_attr.attr,
399 &sys_ipl_fcp_bootprog_attr.attr,
400 &sys_ipl_fcp_br_lba_attr.attr,
401 NULL,
402};
403
404static struct attribute_group ipl_fcp_attr_group = {
405 .attrs = ipl_fcp_attrs,
406};
407
408/* CCW ipl device attributes */
409
9b949165
GKH		 410static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
411 struct kobj_attribute *attr, char *page)
03a4d208
MH		 412{
413 char loadparm[LOADPARM_LEN + 1] = {};
414
05dd2530 415 if (!sclp_ipl_info.is_valid)
03a4d208 416 return sprintf(page, "#unknown#\n");
05dd2530 417 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
03a4d208
MH		 418 EBCASC(loadparm, LOADPARM_LEN);
419 strstrip(loadparm);
420 return sprintf(page, "%s\n", loadparm);
421}
422
9b949165 423static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
03a4d208
MH		 424 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
425
a0443fbb
HB		 426static struct attribute *ipl_ccw_attrs_vm[] = {
427 &sys_ipl_type_attr.attr,
428 &sys_ipl_device_attr.attr,
429 &sys_ipl_ccw_loadparm_attr.attr,
430 &sys_ipl_vm_parm_attr.attr,
431 NULL,
432};
433
434static struct attribute *ipl_ccw_attrs_lpar[] = {
ff6b8ea6
MH		 435 &sys_ipl_type_attr.attr,
436 &sys_ipl_device_attr.attr,
03a4d208 437 &sys_ipl_ccw_loadparm_attr.attr,
ff6b8ea6
MH		 438 NULL,
439};
440
a0443fbb
HB		 441static struct attribute_group ipl_ccw_attr_group_vm = {
442 .attrs = ipl_ccw_attrs_vm,
443};
444
445static struct attribute_group ipl_ccw_attr_group_lpar = {
446 .attrs = ipl_ccw_attrs_lpar
ff6b8ea6
MH		 447};
448
fe355b7f
HY		 449/* NSS ipl device attributes */
450
451DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
452
453static struct attribute *ipl_nss_attrs[] = {
454 &sys_ipl_type_attr.attr,
455 &sys_ipl_nss_name_attr.attr,
a0443fbb
HB		 456 &sys_ipl_ccw_loadparm_attr.attr,
457 &sys_ipl_vm_parm_attr.attr,
fe355b7f
HY		 458 NULL,
459};
460
461static struct attribute_group ipl_nss_attr_group = {
462 .attrs = ipl_nss_attrs,
463};
464
ff6b8ea6
MH		 465/* UNKNOWN ipl device attributes */
466
467static struct attribute *ipl_unknown_attrs[] = {
468 &sys_ipl_type_attr.attr,
469 NULL,
470};
471
472static struct attribute_group ipl_unknown_attr_group = {
473 .attrs = ipl_unknown_attrs,
474};
475
d91885be 476static struct kset *ipl_kset;
ff6b8ea6 477
99ca4e58
MH		 478static int __init ipl_register_fcp_files(void)
479{
480 int rc;
481
482 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
483 if (rc)
484 goto out;
485 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
486 if (rc)
487 goto out_ipl_parm;
488 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
489 if (!rc)
490 goto out;
491
492 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
493
494out_ipl_parm:
495 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
496out:
497 return rc;
498}
499
500static void ipl_run(struct shutdown_trigger *trigger)
501{
502 diag308(DIAG308_IPL, NULL);
503 if (MACHINE_IS_VM)
504 __cpcmd("IPL", NULL, 0, NULL);
505 else if (ipl_info.type == IPL_TYPE_CCW)
506 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
507}
508
2bc89b5e 509static int __init ipl_init(void)
99ca4e58
MH		 510{
511 int rc;
512
513 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
514 if (!ipl_kset) {
515 rc = -ENOMEM;
516 goto out;
517 }
518 switch (ipl_info.type) {
519 case IPL_TYPE_CCW:
a0443fbb
HB		 520 if (MACHINE_IS_VM)
521 rc = sysfs_create_group(&ipl_kset->kobj,
522 &ipl_ccw_attr_group_vm);
523 else
524 rc = sysfs_create_group(&ipl_kset->kobj,
525 &ipl_ccw_attr_group_lpar);
99ca4e58
MH		 526 break;
527 case IPL_TYPE_FCP:
528 case IPL_TYPE_FCP_DUMP:
529 rc = ipl_register_fcp_files();
530 break;
531 case IPL_TYPE_NSS:
532 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
533 break;
534 default:
535 rc = sysfs_create_group(&ipl_kset->kobj,
536 &ipl_unknown_attr_group);
537 break;
538 }
539out:
540 if (rc)
541 panic("ipl_init failed: rc = %i\n", rc);
542
543 return 0;
544}
545
2bc89b5e
HC		 546static struct shutdown_action __refdata ipl_action = {
547 .name = SHUTDOWN_ACTION_IPL_STR,
548 .fn = ipl_run,
549 .init = ipl_init,
550};
99ca4e58 551
ff6b8ea6 552/*
99ca4e58 553 * reipl shutdown action: Reboot Linux on shutdown.
ff6b8ea6
MH		 554 */
555
a0443fbb
HB		 556/* VM IPL PARM attributes */
557static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
558 char *page)
559{
560 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
561
562 reipl_get_ascii_vmparm(vmparm, ipb);
563 return sprintf(page, "%s\n", vmparm);
564}
565
566static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
567 size_t vmparm_max,
568 const char *buf, size_t len)
569{
570 int i, ip_len;
571
572 /* ignore trailing newline */
573 ip_len = len;
574 if ((len > 0) && (buf[len - 1] == '\n'))
575 ip_len--;
576
577 if (ip_len > vmparm_max)
578 return -EINVAL;
579
580 /* parm is used to store kernel options, check for common chars */
581 for (i = 0; i < ip_len; i++)
582 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
583 return -EINVAL;
584
585 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
586 ipb->ipl_info.ccw.vm_parm_len = ip_len;
587 if (ip_len > 0) {
588 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
589 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
590 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
591 } else {
592 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
593 }
594
595 return len;
596}
597
598/* NSS wrapper */
599static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
600 struct kobj_attribute *attr, char *page)
601{
602 return reipl_generic_vmparm_show(reipl_block_nss, page);
603}
604
605static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
606 struct kobj_attribute *attr,
607 const char *buf, size_t len)
608{
609 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
610}
611
612/* CCW wrapper */
613static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
614 struct kobj_attribute *attr, char *page)
615{
616 return reipl_generic_vmparm_show(reipl_block_ccw, page);
617}
618
619static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
620 struct kobj_attribute *attr,
621 const char *buf, size_t len)
622{
623 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
624}
625
626static struct kobj_attribute sys_reipl_nss_vmparm_attr =
627 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
628 reipl_nss_vmparm_store);
629static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
630 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
631 reipl_ccw_vmparm_store);
632
ff6b8ea6
MH		 633/* FCP reipl device attributes */
634
635DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
636 reipl_block_fcp->ipl_info.fcp.wwpn);
637DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
638 reipl_block_fcp->ipl_info.fcp.lun);
639DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
640 reipl_block_fcp->ipl_info.fcp.bootprog);
641DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
642 reipl_block_fcp->ipl_info.fcp.br_lba);
643DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
644 reipl_block_fcp->ipl_info.fcp.devno);
645
646static struct attribute *reipl_fcp_attrs[] = {
647 &sys_reipl_fcp_device_attr.attr,
648 &sys_reipl_fcp_wwpn_attr.attr,
649 &sys_reipl_fcp_lun_attr.attr,
650 &sys_reipl_fcp_bootprog_attr.attr,
651 &sys_reipl_fcp_br_lba_attr.attr,
652 NULL,
653};
654
655static struct attribute_group reipl_fcp_attr_group = {
656 .name = IPL_FCP_STR,
657 .attrs = reipl_fcp_attrs,
658};
659
660/* CCW reipl device attributes */
661
662DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
663 reipl_block_ccw->ipl_info.ccw.devno);
664
a0443fbb
HB		 665static void reipl_get_ascii_loadparm(char *loadparm,
666 struct ipl_parameter_block *ibp)
03a4d208 667{
a0443fbb 668 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
03a4d208
MH		 669 EBCASC(loadparm, LOADPARM_LEN);
670 loadparm[LOADPARM_LEN] = 0;
671 strstrip(loadparm);
672}
673
a0443fbb
HB		 674static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
675 char *page)
03a4d208
MH		 676{
677 char buf[LOADPARM_LEN + 1];
678
a0443fbb 679 reipl_get_ascii_loadparm(buf, ipb);
03a4d208
MH		 680 return sprintf(page, "%s\n", buf);
681}
682
a0443fbb
HB		 683static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
684 const char *buf, size_t len)
03a4d208
MH		 685{
686 int i, lp_len;
687
688 /* ignore trailing newline */
689 lp_len = len;
690 if ((len > 0) && (buf[len - 1] == '\n'))
691 lp_len--;
692 /* loadparm can have max 8 characters and must not start with a blank */
693 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
694 return -EINVAL;
695 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
696 for (i = 0; i < lp_len; i++) {
697 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
698 (buf[i] == '.'))
699 continue;
700 return -EINVAL;
701 }
702 /* initialize loadparm with blanks */
a0443fbb 703 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
03a4d208 704 /* copy and convert to ebcdic */
a0443fbb
HB		 705 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
706 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
03a4d208
MH		 707 return len;
708}
709
a0443fbb
HB		 710/* NSS wrapper */
711static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
712 struct kobj_attribute *attr, char *page)
713{
714 return reipl_generic_loadparm_show(reipl_block_nss, page);
715}
716
717static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
718 struct kobj_attribute *attr,
719 const char *buf, size_t len)
720{
721 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
722}
723
724/* CCW wrapper */
725static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
726 struct kobj_attribute *attr, char *page)
727{
728 return reipl_generic_loadparm_show(reipl_block_ccw, page);
729}
730
731static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
732 struct kobj_attribute *attr,
733 const char *buf, size_t len)
734{
735 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
736}
737
9b949165 738static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
a0443fbb
HB		 739 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
740 reipl_ccw_loadparm_store);
741
742static struct attribute *reipl_ccw_attrs_vm[] = {
743 &sys_reipl_ccw_device_attr.attr,
744 &sys_reipl_ccw_loadparm_attr.attr,
745 &sys_reipl_ccw_vmparm_attr.attr,
746 NULL,
747};
03a4d208 748
a0443fbb 749static struct attribute *reipl_ccw_attrs_lpar[] = {
ff6b8ea6 750 &sys_reipl_ccw_device_attr.attr,
03a4d208 751 &sys_reipl_ccw_loadparm_attr.attr,
ff6b8ea6
MH		 752 NULL,
753};
754
a0443fbb 755static struct attribute_group reipl_ccw_attr_group_vm = {
ff6b8ea6 756 .name = IPL_CCW_STR,
a0443fbb
HB		 757 .attrs = reipl_ccw_attrs_vm,
758};
759
760static struct attribute_group reipl_ccw_attr_group_lpar = {
761 .name = IPL_CCW_STR,
762 .attrs = reipl_ccw_attrs_lpar,
ff6b8ea6
MH		 763};
764
fe355b7f
HY		 765
766/* NSS reipl device attributes */
a0443fbb
HB		 767static void reipl_get_ascii_nss_name(char *dst,
768 struct ipl_parameter_block *ipb)
769{
770 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
771 EBCASC(dst, NSS_NAME_SIZE);
772 dst[NSS_NAME_SIZE] = 0;
773}
774
775static ssize_t reipl_nss_name_show(struct kobject *kobj,
776 struct kobj_attribute *attr, char *page)
777{
778 char nss_name[NSS_NAME_SIZE + 1] = {};
779
780 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
781 return sprintf(page, "%s\n", nss_name);
782}
783
784static ssize_t reipl_nss_name_store(struct kobject *kobj,
785 struct kobj_attribute *attr,
786 const char *buf, size_t len)
787{
788 int nss_len;
789
790 /* ignore trailing newline */
791 nss_len = len;
792 if ((len > 0) && (buf[len - 1] == '\n'))
793 nss_len--;
fe355b7f 794
a0443fbb
HB		 795 if (nss_len > NSS_NAME_SIZE)
796 return -EINVAL;
797
798 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
799 if (nss_len > 0) {
800 reipl_block_nss->ipl_info.ccw.vm_flags |=
801 DIAG308_VM_FLAGS_NSS_VALID;
802 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
803 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
804 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
805 } else {
806 reipl_block_nss->ipl_info.ccw.vm_flags &=
807 ~DIAG308_VM_FLAGS_NSS_VALID;
808 }
809
810 return len;
811}
812
813static struct kobj_attribute sys_reipl_nss_name_attr =
814 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
815 reipl_nss_name_store);
816
817static struct kobj_attribute sys_reipl_nss_loadparm_attr =
818 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
819 reipl_nss_loadparm_store);
fe355b7f
HY		 820
821static struct attribute *reipl_nss_attrs[] = {
822 &sys_reipl_nss_name_attr.attr,
a0443fbb
HB		 823 &sys_reipl_nss_loadparm_attr.attr,
824 &sys_reipl_nss_vmparm_attr.attr,
fe355b7f
HY		 825 NULL,
826};
827
828static struct attribute_group reipl_nss_attr_group = {
829 .name = IPL_NSS_STR,
830 .attrs = reipl_nss_attrs,
831};
832
ff6b8ea6
MH		 833/* reipl type */
834
835static int reipl_set_type(enum ipl_type type)
836{
837 if (!(reipl_capabilities & type))
838 return -EINVAL;
839
840 switch(type) {
841 case IPL_TYPE_CCW:
48657d22
MH		 842 if (diag308_set_works)
843 reipl_method = REIPL_METHOD_CCW_DIAG;
844 else if (MACHINE_IS_VM)
411ed322 845 reipl_method = REIPL_METHOD_CCW_VM;
ff6b8ea6 846 else
411ed322 847 reipl_method = REIPL_METHOD_CCW_CIO;
ff6b8ea6
MH		 848 break;
849 case IPL_TYPE_FCP:
850 if (diag308_set_works)
411ed322 851 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
ff6b8ea6 852 else if (MACHINE_IS_VM)
411ed322 853 reipl_method = REIPL_METHOD_FCP_RO_VM;
ff6b8ea6 854 else
411ed322
MH		 855 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
856 break;
857 case IPL_TYPE_FCP_DUMP:
858 reipl_method = REIPL_METHOD_FCP_DUMP;
ff6b8ea6 859 break;
fe355b7f 860 case IPL_TYPE_NSS:
a0443fbb
HB		 861 if (diag308_set_works)
862 reipl_method = REIPL_METHOD_NSS_DIAG;
863 else
864 reipl_method = REIPL_METHOD_NSS;
411ed322
MH		 865 break;
866 case IPL_TYPE_UNKNOWN:
867 reipl_method = REIPL_METHOD_DEFAULT;
fe355b7f 868 break;
ff6b8ea6 869 default:
411ed322 870 BUG();
ff6b8ea6
MH		 871 }
872 reipl_type = type;
873 return 0;
874}
875
9b949165
GKH		 876static ssize_t reipl_type_show(struct kobject *kobj,
877 struct kobj_attribute *attr, char *page)
ff6b8ea6
MH		 878{
879 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
880}
881
9b949165
GKH		 882static ssize_t reipl_type_store(struct kobject *kobj,
883 struct kobj_attribute *attr,
884 const char *buf, size_t len)
ff6b8ea6
MH		 885{
886 int rc = -EINVAL;
887
888 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
889 rc = reipl_set_type(IPL_TYPE_CCW);
890 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
891 rc = reipl_set_type(IPL_TYPE_FCP);
fe355b7f
HY		 892 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
893 rc = reipl_set_type(IPL_TYPE_NSS);
ff6b8ea6
MH		 894 return (rc != 0) ? rc : len;
895}
896
9b949165 897static struct kobj_attribute reipl_type_attr =
99ca4e58 898 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
ff6b8ea6 899
d91885be 900static struct kset *reipl_kset;
ff6b8ea6 901
a0443fbb
HB		 902static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
903 const enum ipl_method m)
904{
905 char loadparm[LOADPARM_LEN + 1] = {};
906 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
907 char nss_name[NSS_NAME_SIZE + 1] = {};
908 size_t pos = 0;
909
910 reipl_get_ascii_loadparm(loadparm, ipb);
911 reipl_get_ascii_nss_name(nss_name, ipb);
912 reipl_get_ascii_vmparm(vmparm, ipb);
913
914 switch (m) {
915 case REIPL_METHOD_CCW_VM:
916 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
917 break;
918 case REIPL_METHOD_NSS:
919 pos = sprintf(dst, "IPL %s", nss_name);
920 break;
921 default:
922 break;
923 }
924 if (strlen(loadparm) > 0)
925 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
926 if (strlen(vmparm) > 0)
927 sprintf(dst + pos, " PARM %s", vmparm);
928}
929
a806170e 930static void reipl_run(struct shutdown_trigger *trigger)
ff6b8ea6
MH		 931{
932 struct ccw_dev_id devid;
a0443fbb 933 static char buf[128];
ff6b8ea6 934
ff6b8ea6 935 switch (reipl_method) {
411ed322 936 case REIPL_METHOD_CCW_CIO:
ff6b8ea6
MH		 937 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
938 devid.ssid = 0;
939 reipl_ccw_dev(&devid);
940 break;
411ed322 941 case REIPL_METHOD_CCW_VM:
a0443fbb 942 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
740b5706 943 __cpcmd(buf, NULL, 0, NULL);
ff6b8ea6 944 break;
411ed322 945 case REIPL_METHOD_CCW_DIAG:
ff6b8ea6
MH		 946 diag308(DIAG308_SET, reipl_block_ccw);
947 diag308(DIAG308_IPL, NULL);
948 break;
411ed322 949 case REIPL_METHOD_FCP_RW_DIAG:
ff6b8ea6
MH		 950 diag308(DIAG308_SET, reipl_block_fcp);
951 diag308(DIAG308_IPL, NULL);
952 break;
411ed322 953 case REIPL_METHOD_FCP_RO_DIAG:
ff6b8ea6
MH		 954 diag308(DIAG308_IPL, NULL);
955 break;
411ed322 956 case REIPL_METHOD_FCP_RO_VM:
740b5706 957 __cpcmd("IPL", NULL, 0, NULL);
ff6b8ea6 958 break;
a0443fbb
HB		 959 case REIPL_METHOD_NSS_DIAG:
960 diag308(DIAG308_SET, reipl_block_nss);
961 diag308(DIAG308_IPL, NULL);
962 break;
411ed322 963 case REIPL_METHOD_NSS:
a0443fbb 964 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
fe355b7f
HY		 965 __cpcmd(buf, NULL, 0, NULL);
966 break;
411ed322 967 case REIPL_METHOD_DEFAULT:
ff6b8ea6 968 if (MACHINE_IS_VM)
740b5706 969 __cpcmd("IPL", NULL, 0, NULL);
ff6b8ea6
MH		 970 diag308(DIAG308_IPL, NULL);
971 break;
411ed322
MH		 972 case REIPL_METHOD_FCP_DUMP:
973 default:
974 break;
ff6b8ea6 975 }
208e5591 976 disabled_wait((unsigned long) __builtin_return_address(0));
ff6b8ea6
MH		 977}
978
a0443fbb 979static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
ff6b8ea6 980{
a0443fbb
HB		 981 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
982 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
983 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
984 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
985}
ff6b8ea6 986
a0443fbb
HB		 987static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
988{
989 /* LOADPARM */
990 /* check if read scp info worked and set loadparm */
991 if (sclp_ipl_info.is_valid)
992 memcpy(ipb->ipl_info.ccw.load_parm,
993 &sclp_ipl_info.loadparm, LOADPARM_LEN);
994 else
995 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
996 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
997 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
998
999 /* VM PARM */
1000 if (MACHINE_IS_VM && diag308_set_works &&
1001 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1002
1003 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1004 ipb->ipl_info.ccw.vm_parm_len =
1005 ipl_block.ipl_info.ccw.vm_parm_len;
1006 memcpy(ipb->ipl_info.ccw.vm_parm,
1007 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1008 }
ff6b8ea6
MH		 1009}
1010
99ca4e58 1011static int __init reipl_nss_init(void)
ff6b8ea6
MH		 1012{
1013 int rc;
1014
99ca4e58
MH		 1015 if (!MACHINE_IS_VM)
1016 return 0;
a0443fbb
HB		 1017
1018 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1019 if (!reipl_block_nss)
1020 return -ENOMEM;
1021
1022 if (!diag308_set_works)
1023 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1024
99ca4e58 1025 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
fe355b7f
HY		 1026 if (rc)
1027 return rc;
a0443fbb
HB		 1028
1029 reipl_block_ccw_init(reipl_block_nss);
1030 if (ipl_info.type == IPL_TYPE_NSS) {
1031 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1032 ' ', NSS_NAME_SIZE);
1033 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1034 kernel_nss_name, strlen(kernel_nss_name));
1035 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1036 reipl_block_nss->ipl_info.ccw.vm_flags |=
1037 DIAG308_VM_FLAGS_NSS_VALID;
1038
1039 reipl_block_ccw_fill_parms(reipl_block_nss);
1040 }
1041
fe355b7f
HY		 1042 reipl_capabilities |= IPL_TYPE_NSS;
1043 return 0;
1044}
1045
ff6b8ea6
MH		 1046static int __init reipl_ccw_init(void)
1047{
1048 int rc;
1049
1050 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1051 if (!reipl_block_ccw)
1052 return -ENOMEM;
a0443fbb
HB		 1053
1054 if (MACHINE_IS_VM) {
1055 if (!diag308_set_works)
1056 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1057 rc = sysfs_create_group(&reipl_kset->kobj,
1058 &reipl_ccw_attr_group_vm);
1059 } else {
1060 if(!diag308_set_works)
1061 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1062 rc = sysfs_create_group(&reipl_kset->kobj,
1063 &reipl_ccw_attr_group_lpar);
ff6b8ea6 1064 }
a0443fbb
HB		 1065 if (rc)
1066 return rc;
1067
1068 reipl_block_ccw_init(reipl_block_ccw);
1069 if (ipl_info.type == IPL_TYPE_CCW) {
ff6b8ea6 1070 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
a0443fbb
HB		 1071 reipl_block_ccw_fill_parms(reipl_block_ccw);
1072 }
1073
ff6b8ea6
MH		 1074 reipl_capabilities |= IPL_TYPE_CCW;
1075 return 0;
1076}
1077
1078static int __init reipl_fcp_init(void)
1079{
1080 int rc;
1081
411ed322 1082 if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP))
ff6b8ea6 1083 return 0;
411ed322 1084 if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP))
ff6b8ea6
MH		 1085 make_attrs_ro(reipl_fcp_attrs);
1086
1087 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1088 if (!reipl_block_fcp)
1089 return -ENOMEM;
d91885be 1090 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group);
ff6b8ea6
MH		 1091 if (rc) {
1092 free_page((unsigned long)reipl_block_fcp);
1093 return rc;
1094 }
411ed322 1095 if (ipl_info.type == IPL_TYPE_FCP) {
ff6b8ea6
MH		 1096 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1097 } else {
1098 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1099 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1100 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
ff6b8ea6
MH		 1101 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1102 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1103 }
1104 reipl_capabilities |= IPL_TYPE_FCP;
1105 return 0;
1106}
1107
2bc89b5e 1108static int __init reipl_init(void)
ff6b8ea6
MH		 1109{
1110 int rc;
1111
f62ed9e3 1112 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
d91885be
GKH		 1113 if (!reipl_kset)
1114 return -ENOMEM;
1115 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
ff6b8ea6 1116 if (rc) {
d91885be 1117 kset_unregister(reipl_kset);
ff6b8ea6
MH		 1118 return rc;
1119 }
1120 rc = reipl_ccw_init();
1121 if (rc)
1122 return rc;
1123 rc = reipl_fcp_init();
fe355b7f
HY		 1124 if (rc)
1125 return rc;
1126 rc = reipl_nss_init();
ff6b8ea6
MH		 1127 if (rc)
1128 return rc;
411ed322 1129 rc = reipl_set_type(ipl_info.type);
ff6b8ea6
MH		 1130 if (rc)
1131 return rc;
1132 return 0;
1133}
1134
2bc89b5e
HC		 1135static struct shutdown_action __refdata reipl_action = {
1136 .name = SHUTDOWN_ACTION_REIPL_STR,
1137 .fn = reipl_run,
1138 .init = reipl_init,
1139};
99ca4e58
MH		 1140
1141/*
1142 * dump shutdown action: Dump Linux on shutdown.
1143 */
1144
1145/* FCP dump device attributes */
1146
1147DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1148 dump_block_fcp->ipl_info.fcp.wwpn);
1149DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1150 dump_block_fcp->ipl_info.fcp.lun);
1151DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1152 dump_block_fcp->ipl_info.fcp.bootprog);
1153DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1154 dump_block_fcp->ipl_info.fcp.br_lba);
1155DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1156 dump_block_fcp->ipl_info.fcp.devno);
1157
1158static struct attribute *dump_fcp_attrs[] = {
1159 &sys_dump_fcp_device_attr.attr,
1160 &sys_dump_fcp_wwpn_attr.attr,
1161 &sys_dump_fcp_lun_attr.attr,
1162 &sys_dump_fcp_bootprog_attr.attr,
1163 &sys_dump_fcp_br_lba_attr.attr,
1164 NULL,
1165};
1166
1167static struct attribute_group dump_fcp_attr_group = {
1168 .name = IPL_FCP_STR,
1169 .attrs = dump_fcp_attrs,
1170};
1171
1172/* CCW dump device attributes */
1173
1174DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1175 dump_block_ccw->ipl_info.ccw.devno);
1176
1177static struct attribute *dump_ccw_attrs[] = {
1178 &sys_dump_ccw_device_attr.attr,
1179 NULL,
1180};
1181
1182static struct attribute_group dump_ccw_attr_group = {
1183 .name = IPL_CCW_STR,
1184 .attrs = dump_ccw_attrs,
1185};
1186
1187/* dump type */
1188
1189static int dump_set_type(enum dump_type type)
1190{
1191 if (!(dump_capabilities & type))
1192 return -EINVAL;
1193 switch (type) {
1194 case DUMP_TYPE_CCW:
48657d22
MH		 1195 if (diag308_set_works)
1196 dump_method = DUMP_METHOD_CCW_DIAG;
1197 else if (MACHINE_IS_VM)
99ca4e58
MH		 1198 dump_method = DUMP_METHOD_CCW_VM;
1199 else
1200 dump_method = DUMP_METHOD_CCW_CIO;
1201 break;
1202 case DUMP_TYPE_FCP:
1203 dump_method = DUMP_METHOD_FCP_DIAG;
1204 break;
1205 default:
1206 dump_method = DUMP_METHOD_NONE;
1207 }
1208 dump_type = type;
1209 return 0;
1210}
1211
1212static ssize_t dump_type_show(struct kobject *kobj,
1213 struct kobj_attribute *attr, char *page)
1214{
1215 return sprintf(page, "%s\n", dump_type_str(dump_type));
1216}
1217
1218static ssize_t dump_type_store(struct kobject *kobj,
1219 struct kobj_attribute *attr,
1220 const char *buf, size_t len)
1221{
1222 int rc = -EINVAL;
1223
1224 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1225 rc = dump_set_type(DUMP_TYPE_NONE);
1226 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1227 rc = dump_set_type(DUMP_TYPE_CCW);
1228 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1229 rc = dump_set_type(DUMP_TYPE_FCP);
1230 return (rc != 0) ? rc : len;
1231}
1232
1233static struct kobj_attribute dump_type_attr =
1234 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1235
1236static struct kset *dump_kset;
1237
1238static void dump_run(struct shutdown_trigger *trigger)
1239{
1240 struct ccw_dev_id devid;
1241 static char buf[100];
1242
1243 switch (dump_method) {
1244 case DUMP_METHOD_CCW_CIO:
1245 smp_send_stop();
1246 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1247 devid.ssid = 0;
1248 reipl_ccw_dev(&devid);
1249 break;
1250 case DUMP_METHOD_CCW_VM:
1251 smp_send_stop();
1252 sprintf(buf, "STORE STATUS");
1253 __cpcmd(buf, NULL, 0, NULL);
1254 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1255 __cpcmd(buf, NULL, 0, NULL);
1256 break;
1257 case DUMP_METHOD_CCW_DIAG:
1258 diag308(DIAG308_SET, dump_block_ccw);
1259 diag308(DIAG308_DUMP, NULL);
1260 break;
1261 case DUMP_METHOD_FCP_DIAG:
1262 diag308(DIAG308_SET, dump_block_fcp);
1263 diag308(DIAG308_DUMP, NULL);
1264 break;
1265 case DUMP_METHOD_NONE:
1266 default:
1267 return;
1268 }
1269 printk(KERN_EMERG "Dump failed!\n");
1270}
1271
ff6b8ea6
MH		 1272static int __init dump_ccw_init(void)
1273{
1274 int rc;
1275
1276 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1277 if (!dump_block_ccw)
1278 return -ENOMEM;
d91885be 1279 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
ff6b8ea6
MH		 1280 if (rc) {
1281 free_page((unsigned long)dump_block_ccw);
1282 return rc;
1283 }
1284 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1285 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1286 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
ff6b8ea6 1287 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
411ed322 1288 dump_capabilities |= DUMP_TYPE_CCW;
ff6b8ea6
MH		 1289 return 0;
1290}
1291
ff6b8ea6
MH		 1292static int __init dump_fcp_init(void)
1293{
1294 int rc;
1295
05dd2530 1296 if (!sclp_ipl_info.has_dump)
ff6b8ea6
MH		 1297 return 0; /* LDIPL DUMP is not installed */
1298 if (!diag308_set_works)
1299 return 0;
1300 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1301 if (!dump_block_fcp)
1302 return -ENOMEM;
d91885be 1303 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
ff6b8ea6
MH		 1304 if (rc) {
1305 free_page((unsigned long)dump_block_fcp);
1306 return rc;
1307 }
1308 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1309 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1310 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
ff6b8ea6
MH		 1311 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1312 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
411ed322 1313 dump_capabilities |= DUMP_TYPE_FCP;
ff6b8ea6
MH		 1314 return 0;
1315}
1316
2bc89b5e 1317static int __init dump_init(void)
ff6b8ea6
MH		 1318{
1319 int rc;
1320
f62ed9e3 1321 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
d91885be
GKH		 1322 if (!dump_kset)
1323 return -ENOMEM;
99ca4e58 1324 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
ff6b8ea6 1325 if (rc) {
d91885be 1326 kset_unregister(dump_kset);
ff6b8ea6
MH		 1327 return rc;
1328 }
1329 rc = dump_ccw_init();
1330 if (rc)
1331 return rc;
1332 rc = dump_fcp_init();
1333 if (rc)
1334 return rc;
411ed322 1335 dump_set_type(DUMP_TYPE_NONE);
ff6b8ea6
MH		 1336 return 0;
1337}
1338
2bc89b5e
HC		 1339static struct shutdown_action __refdata dump_action = {
1340 .name = SHUTDOWN_ACTION_DUMP_STR,
1341 .fn = dump_run,
1342 .init = dump_init,
1343};
99ca4e58
MH		 1344
1345/*
1346 * vmcmd shutdown action: Trigger vm command on shutdown.
1347 */
1348
1349static char vmcmd_on_reboot[128];
1350static char vmcmd_on_panic[128];
1351static char vmcmd_on_halt[128];
1352static char vmcmd_on_poff[128];
1353
1354DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1355DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1356DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1357DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1358
1359static struct attribute *vmcmd_attrs[] = {
1360 &sys_vmcmd_on_reboot_attr.attr,
1361 &sys_vmcmd_on_panic_attr.attr,
1362 &sys_vmcmd_on_halt_attr.attr,
1363 &sys_vmcmd_on_poff_attr.attr,
1364 NULL,
1365};
1366
1367static struct attribute_group vmcmd_attr_group = {
1368 .attrs = vmcmd_attrs,
1369};
1370
1371static struct kset *vmcmd_kset;
1372
1373static void vmcmd_run(struct shutdown_trigger *trigger)
ff6b8ea6 1374{
99ca4e58
MH		 1375 char *cmd, *next_cmd;
1376
1377 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1378 cmd = vmcmd_on_reboot;
1379 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1380 cmd = vmcmd_on_panic;
1381 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1382 cmd = vmcmd_on_halt;
1383 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1384 cmd = vmcmd_on_poff;
1385 else
1386 return;
1387
1388 if (strlen(cmd) == 0)
1389 return;
1390 do {
1391 next_cmd = strchr(cmd, '\n');
1392 if (next_cmd) {
1393 next_cmd[0] = 0;
1394 next_cmd += 1;
1395 }
1396 __cpcmd(cmd, NULL, 0, NULL);
1397 cmd = next_cmd;
1398 } while (cmd != NULL);
1399}
1400
1401static int vmcmd_init(void)
1402{
1403 if (!MACHINE_IS_VM)
1404 return -ENOTSUPP;
1405 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1406 if (!vmcmd_kset)
1407 return -ENOMEM;
1408 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1409}
1410
1411static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1412 vmcmd_run, vmcmd_init};
1413
1414/*
1415 * stop shutdown action: Stop Linux on shutdown.
1416 */
1417
1418static void stop_run(struct shutdown_trigger *trigger)
1419{
c6547497
MH		 1420 if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1421 disabled_wait((unsigned long) __builtin_return_address(0));
1422 else {
1423 signal_processor(smp_processor_id(), sigp_stop);
1424 for (;;);
1425 }
99ca4e58
MH		 1426}
1427
1428static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1429 stop_run, NULL};
1430
1431/* action list */
1432
1433static struct shutdown_action *shutdown_actions_list[] = {
1434 &ipl_action, &reipl_action, &dump_action, &vmcmd_action, &stop_action};
1435#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1436
1437/*
1438 * Trigger section
1439 */
1440
1441static struct kset *shutdown_actions_kset;
1442
1443static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1444 size_t len)
1445{
1446 int i;
1447 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1448 if (!shutdown_actions_list[i])
1449 continue;
1450 if (strncmp(buf, shutdown_actions_list[i]->name,
1451 strlen(shutdown_actions_list[i]->name)) == 0) {
1452 trigger->action = shutdown_actions_list[i];
1453 return len;
1454 }
1455 }
1456 return -EINVAL;
1457}
1458
1459/* on reipl */
1460
1461static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1462 &reipl_action};
1463
1464static ssize_t on_reboot_show(struct kobject *kobj,
1465 struct kobj_attribute *attr, char *page)
1466{
1467 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1468}
1469
1470static ssize_t on_reboot_store(struct kobject *kobj,
1471 struct kobj_attribute *attr,
1472 const char *buf, size_t len)
1473{
1474 return set_trigger(buf, &on_reboot_trigger, len);
1475}
1476
1477static struct kobj_attribute on_reboot_attr =
1478 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1479
1480static void do_machine_restart(char *__unused)
1481{
1482 smp_send_stop();
1483 on_reboot_trigger.action->fn(&on_reboot_trigger);
1484 reipl_run(NULL);
1485}
1486void (*_machine_restart)(char *command) = do_machine_restart;
1487
1488/* on panic */
1489
1490static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1491
1492static ssize_t on_panic_show(struct kobject *kobj,
1493 struct kobj_attribute *attr, char *page)
1494{
1495 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1496}
1497
1498static ssize_t on_panic_store(struct kobject *kobj,
1499 struct kobj_attribute *attr,
1500 const char *buf, size_t len)
1501{
1502 return set_trigger(buf, &on_panic_trigger, len);
1503}
1504
1505static struct kobj_attribute on_panic_attr =
1506 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1507
1508static void do_panic(void)
1509{
1510 on_panic_trigger.action->fn(&on_panic_trigger);
1511 stop_run(&on_panic_trigger);
1512}
1513
1514/* on halt */
1515
1516static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1517
1518static ssize_t on_halt_show(struct kobject *kobj,
1519 struct kobj_attribute *attr, char *page)
1520{
1521 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1522}
1523
1524static ssize_t on_halt_store(struct kobject *kobj,
1525 struct kobj_attribute *attr,
1526 const char *buf, size_t len)
1527{
1528 return set_trigger(buf, &on_halt_trigger, len);
1529}
1530
1531static struct kobj_attribute on_halt_attr =
1532 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
ff6b8ea6 1533
99ca4e58
MH		 1534
1535static void do_machine_halt(void)
1536{
1537 smp_send_stop();
1538 on_halt_trigger.action->fn(&on_halt_trigger);
1539 stop_run(&on_halt_trigger);
1540}
1541void (*_machine_halt)(void) = do_machine_halt;
1542
1543/* on power off */
1544
1545static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1546
1547static ssize_t on_poff_show(struct kobject *kobj,
1548 struct kobj_attribute *attr, char *page)
1549{
1550 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1551}
1552
1553static ssize_t on_poff_store(struct kobject *kobj,
1554 struct kobj_attribute *attr,
1555 const char *buf, size_t len)
1556{
1557 return set_trigger(buf, &on_poff_trigger, len);
1558}
1559
1560static struct kobj_attribute on_poff_attr =
1561 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1562
1563
1564static void do_machine_power_off(void)
1565{
1566 smp_send_stop();
1567 on_poff_trigger.action->fn(&on_poff_trigger);
1568 stop_run(&on_poff_trigger);
1569}
1570void (*_machine_power_off)(void) = do_machine_power_off;
1571
1572static void __init shutdown_triggers_init(void)
1573{
d91885be 1574 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
f62ed9e3 1575 firmware_kobj);
d91885be 1576 if (!shutdown_actions_kset)
99ca4e58
MH		 1577 goto fail;
1578 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1579 &on_reboot_attr.attr))
1580 goto fail;
1581 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1582 &on_panic_attr.attr))
1583 goto fail;
1584 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1585 &on_halt_attr.attr))
1586 goto fail;
1587 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1588 &on_poff_attr.attr))
1589 goto fail;
1590
1591 return;
1592fail:
1593 panic("shutdown_triggers_init failed\n");
1594}
1595
1596static void __init shutdown_actions_init(void)
1597{
1598 int i;
1599
1600 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1601 if (!shutdown_actions_list[i]->init)
1602 continue;
1603 if (shutdown_actions_list[i]->init())
1604 shutdown_actions_list[i] = NULL;
ff6b8ea6 1605 }
ff6b8ea6
MH		 1606}
1607
1608static int __init s390_ipl_init(void)
1609{
d09293ae 1610 sclp_get_ipl_info(&sclp_ipl_info);
99ca4e58
MH		 1611 shutdown_actions_init();
1612 shutdown_triggers_init();
ff6b8ea6
MH		 1613 return 0;
1614}
1615
1616__initcall(s390_ipl_init);
15e9b586 1617
99ca4e58
MH		 1618static void __init strncpy_skip_quote(char *dst, char *src, int n)
1619{
1620 int sx, dx;
1621
1622 dx = 0;
1623 for (sx = 0; src[sx] != 0; sx++) {
1624 if (src[sx] == '"')
1625 continue;
1626 dst[dx++] = src[sx];
1627 if (dx >= n)
1628 break;
1629 }
1630}
1631
1632static int __init vmcmd_on_reboot_setup(char *str)
1633{
1634 if (!MACHINE_IS_VM)
1635 return 1;
1636 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1637 vmcmd_on_reboot[127] = 0;
1638 on_reboot_trigger.action = &vmcmd_action;
1639 return 1;
1640}
1641__setup("vmreboot=", vmcmd_on_reboot_setup);
1642
1643static int __init vmcmd_on_panic_setup(char *str)
1644{
1645 if (!MACHINE_IS_VM)
1646 return 1;
1647 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1648 vmcmd_on_panic[127] = 0;
1649 on_panic_trigger.action = &vmcmd_action;
1650 return 1;
1651}
1652__setup("vmpanic=", vmcmd_on_panic_setup);
1653
1654static int __init vmcmd_on_halt_setup(char *str)
1655{
1656 if (!MACHINE_IS_VM)
1657 return 1;
1658 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1659 vmcmd_on_halt[127] = 0;
1660 on_halt_trigger.action = &vmcmd_action;
1661 return 1;
1662}
1663__setup("vmhalt=", vmcmd_on_halt_setup);
1664
1665static int __init vmcmd_on_poff_setup(char *str)
1666{
1667 if (!MACHINE_IS_VM)
1668 return 1;
1669 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1670 vmcmd_on_poff[127] = 0;
1671 on_poff_trigger.action = &vmcmd_action;
1672 return 1;
1673}
1674__setup("vmpoff=", vmcmd_on_poff_setup);
1675
1676static int on_panic_notify(struct notifier_block *self,
1677 unsigned long event, void *data)
1678{
1679 do_panic();
1680 return NOTIFY_OK;
1681}
1682
1683static struct notifier_block on_panic_nb = {
1684 .notifier_call = on_panic_notify,
1685 .priority = 0,
1686};
1687
1688void __init setup_ipl(void)
1689{
1690 ipl_info.type = get_ipl_type();
1691 switch (ipl_info.type) {
1692 case IPL_TYPE_CCW:
1693 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1694 ipl_info.data.ccw.dev_id.ssid = 0;
1695 break;
1696 case IPL_TYPE_FCP:
1697 case IPL_TYPE_FCP_DUMP:
1698 ipl_info.data.fcp.dev_id.devno =
1699 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1700 ipl_info.data.fcp.dev_id.ssid = 0;
1701 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1702 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1703 break;
1704 case IPL_TYPE_NSS:
1705 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1706 sizeof(ipl_info.data.nss.name));
1707 break;
1708 case IPL_TYPE_UNKNOWN:
1709 default:
1710 /* We have no info to copy */
1711 break;
1712 }
1713 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1714}
1715
a0443fbb
HB		 1716void __init ipl_update_parameters(void)
1717{
1718 if (diag308(DIAG308_STORE, &ipl_block) == DIAG308_RC_OK)
1719 diag308_set_works = 1;
1720}
1721
6fc321fd
HC		 1722void __init ipl_save_parameters(void)
1723{
1724 struct cio_iplinfo iplinfo;
1725 unsigned int *ipl_ptr;
1726 void *src, *dst;
1727
1728 if (cio_get_iplinfo(&iplinfo))
1729 return;
1730
1731 ipl_devno = iplinfo.devno;
1732 ipl_flags |= IPL_DEVNO_VALID;
1733 if (!iplinfo.is_qdio)
1734 return;
1735 ipl_flags |= IPL_PARMBLOCK_VALID;
1736 ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
1737 src = (void *)(unsigned long)*ipl_ptr;
1738 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1739 memmove(dst, src, PAGE_SIZE);
1740 *ipl_ptr = IPL_PARMBLOCK_ORIGIN;
1741}
1742
15e9b586
HC		 1743static LIST_HEAD(rcall);
1744static DEFINE_MUTEX(rcall_mutex);
1745
1746void register_reset_call(struct reset_call *reset)
1747{
1748 mutex_lock(&rcall_mutex);
1749 list_add(&reset->list, &rcall);
1750 mutex_unlock(&rcall_mutex);
1751}
1752EXPORT_SYMBOL_GPL(register_reset_call);
1753
1754void unregister_reset_call(struct reset_call *reset)
1755{
1756 mutex_lock(&rcall_mutex);
1757 list_del(&reset->list);
1758 mutex_unlock(&rcall_mutex);
1759}
1760EXPORT_SYMBOL_GPL(unregister_reset_call);
1761
1762static void do_reset_calls(void)
1763{
1764 struct reset_call *reset;
1765
1766 list_for_each_entry(reset, &rcall, list)
1767 reset->fn();
1768}
1769
c5dd8586 1770u32 dump_prefix_page;
15e9b586
HC		 1771
1772void s390_reset_system(void)
1773{
1774 struct _lowcore *lc;
1775
15e9b586 1776 lc = (struct _lowcore *)(unsigned long) store_prefix();
a45e1414
MH		 1777
1778 /* Stack for interrupt/machine check handler */
15e9b586
HC		 1779 lc->panic_stack = S390_lowcore.panic_stack;
1780
da1cf23e 1781 /* Save prefix page address for dump case */
c5dd8586 1782 dump_prefix_page = (u32)(unsigned long) lc;
da1cf23e 1783
15e9b586
HC		 1784 /* Disable prefixing */
1785 set_prefix(0);
1786
1787 /* Disable lowcore protection */
1788 __ctl_clear_bit(0,28);
1789
1790 /* Set new machine check handler */
c1821c2e 1791 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
15e9b586 1792 S390_lowcore.mcck_new_psw.addr =
ab14de6c 1793 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
a45e1414
MH		 1794
1795 /* Set new program check handler */
c1821c2e 1796 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
a45e1414 1797 S390_lowcore.program_new_psw.addr =
ab14de6c 1798 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
a45e1414 1799
15e9b586
HC		 1800 do_reset_calls();
1801}
99ca4e58 1802
Clone of davem's net-next-2.6 tree