s390/ipl: revert Load Normal semantics for LPAR CCW-type re-IPL
[sfrench/cifs-2.6.git] / arch / s390 / kernel / ipl.c
1 /*
2  *    ipl/reipl/dump support for Linux on s390.
3  *
4  *    Copyright IBM Corp. 2005, 2012
5  *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
6  *               Heiko Carstens <heiko.carstens@de.ibm.com>
7  *               Volker Sameske <sameske@de.ibm.com>
8  */
9
10 #include <linux/types.h>
11 #include <linux/export.h>
12 #include <linux/init.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/reboot.h>
16 #include <linux/ctype.h>
17 #include <linux/fs.h>
18 #include <linux/gfp.h>
19 #include <linux/crash_dump.h>
20 #include <linux/debug_locks.h>
21 #include <asm/diag.h>
22 #include <asm/ipl.h>
23 #include <asm/smp.h>
24 #include <asm/setup.h>
25 #include <asm/cpcmd.h>
26 #include <asm/cio.h>
27 #include <asm/ebcdic.h>
28 #include <asm/reset.h>
29 #include <asm/sclp.h>
30 #include <asm/checksum.h>
31 #include <asm/debug.h>
32 #include <asm/os_info.h>
33 #include "entry.h"
34
35 #define IPL_PARM_BLOCK_VERSION 0
36
37 #define IPL_UNKNOWN_STR         "unknown"
38 #define IPL_CCW_STR             "ccw"
39 #define IPL_FCP_STR             "fcp"
40 #define IPL_FCP_DUMP_STR        "fcp_dump"
41 #define IPL_NSS_STR             "nss"
42
43 #define DUMP_CCW_STR            "ccw"
44 #define DUMP_FCP_STR            "fcp"
45 #define DUMP_NONE_STR           "none"
46
47 /*
48  * Four shutdown trigger types are supported:
49  * - panic
50  * - halt
51  * - power off
52  * - reipl
53  * - restart
54  */
55 #define ON_PANIC_STR            "on_panic"
56 #define ON_HALT_STR             "on_halt"
57 #define ON_POFF_STR             "on_poff"
58 #define ON_REIPL_STR            "on_reboot"
59 #define ON_RESTART_STR          "on_restart"
60
61 struct shutdown_action;
62 struct shutdown_trigger {
63         char *name;
64         struct shutdown_action *action;
65 };
66
67 /*
68  * The following shutdown action types are supported:
69  */
70 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
71 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
72 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
73 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
74 #define SHUTDOWN_ACTION_STOP_STR        "stop"
75 #define SHUTDOWN_ACTION_DUMP_REIPL_STR  "dump_reipl"
76
77 struct shutdown_action {
78         char *name;
79         void (*fn) (struct shutdown_trigger *trigger);
80         int (*init) (void);
81         int init_rc;
82 };
83
84 static char *ipl_type_str(enum ipl_type type)
85 {
86         switch (type) {
87         case IPL_TYPE_CCW:
88                 return IPL_CCW_STR;
89         case IPL_TYPE_FCP:
90                 return IPL_FCP_STR;
91         case IPL_TYPE_FCP_DUMP:
92                 return IPL_FCP_DUMP_STR;
93         case IPL_TYPE_NSS:
94                 return IPL_NSS_STR;
95         case IPL_TYPE_UNKNOWN:
96         default:
97                 return IPL_UNKNOWN_STR;
98         }
99 }
100
101 enum dump_type {
102         DUMP_TYPE_NONE  = 1,
103         DUMP_TYPE_CCW   = 2,
104         DUMP_TYPE_FCP   = 4,
105 };
106
107 static char *dump_type_str(enum dump_type type)
108 {
109         switch (type) {
110         case DUMP_TYPE_NONE:
111                 return DUMP_NONE_STR;
112         case DUMP_TYPE_CCW:
113                 return DUMP_CCW_STR;
114         case DUMP_TYPE_FCP:
115                 return DUMP_FCP_STR;
116         default:
117                 return NULL;
118         }
119 }
120
121 /*
122  * Must be in data section since the bss section
123  * is not cleared when these are accessed.
124  */
125 static u8 ipl_ssid __section(.data) = 0;
126 static u16 ipl_devno __section(.data) = 0;
127 u32 ipl_flags __section(.data) = 0;
128
129 enum ipl_method {
130         REIPL_METHOD_CCW_CIO,
131         REIPL_METHOD_CCW_DIAG,
132         REIPL_METHOD_CCW_VM,
133         REIPL_METHOD_FCP_RO_DIAG,
134         REIPL_METHOD_FCP_RW_DIAG,
135         REIPL_METHOD_FCP_RO_VM,
136         REIPL_METHOD_FCP_DUMP,
137         REIPL_METHOD_NSS,
138         REIPL_METHOD_NSS_DIAG,
139         REIPL_METHOD_DEFAULT,
140 };
141
142 enum dump_method {
143         DUMP_METHOD_NONE,
144         DUMP_METHOD_CCW_CIO,
145         DUMP_METHOD_CCW_DIAG,
146         DUMP_METHOD_CCW_VM,
147         DUMP_METHOD_FCP_DIAG,
148 };
149
150 static int diag308_set_works = 0;
151
152 static struct ipl_parameter_block ipl_block;
153
154 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
155
156 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
157 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
158 static struct ipl_parameter_block *reipl_block_fcp;
159 static struct ipl_parameter_block *reipl_block_ccw;
160 static struct ipl_parameter_block *reipl_block_nss;
161 static struct ipl_parameter_block *reipl_block_actual;
162
163 static int dump_capabilities = DUMP_TYPE_NONE;
164 static enum dump_type dump_type = DUMP_TYPE_NONE;
165 static enum dump_method dump_method = DUMP_METHOD_NONE;
166 static struct ipl_parameter_block *dump_block_fcp;
167 static struct ipl_parameter_block *dump_block_ccw;
168
169 static struct sclp_ipl_info sclp_ipl_info;
170
171 static inline int __diag308(unsigned long subcode, void *addr)
172 {
173         register unsigned long _addr asm("0") = (unsigned long) addr;
174         register unsigned long _rc asm("1") = 0;
175
176         asm volatile(
177                 "       diag    %0,%2,0x308\n"
178                 "0:     nopr    %%r7\n"
179                 EX_TABLE(0b,0b)
180                 : "+d" (_addr), "+d" (_rc)
181                 : "d" (subcode) : "cc", "memory");
182         return _rc;
183 }
184
185 int diag308(unsigned long subcode, void *addr)
186 {
187         diag_stat_inc(DIAG_STAT_X308);
188         return __diag308(subcode, addr);
189 }
190 EXPORT_SYMBOL_GPL(diag308);
191
192 /* SYSFS */
193
194 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...)              \
195 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
196                 struct kobj_attribute *attr,                            \
197                 char *page)                                             \
198 {                                                                       \
199         return snprintf(page, PAGE_SIZE, _format, ##args);              \
200 }
201
202 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk)                 \
203 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
204                 struct kobj_attribute *attr,                            \
205                 const char *buf, size_t len)                            \
206 {                                                                       \
207         unsigned long long ssid, devno;                                 \
208                                                                         \
209         if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2)           \
210                 return -EINVAL;                                         \
211                                                                         \
212         if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL)              \
213                 return -EINVAL;                                         \
214                                                                         \
215         _ipl_blk.ssid = ssid;                                           \
216         _ipl_blk.devno = devno;                                         \
217         return len;                                                     \
218 }
219
220 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk)                \
221 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n",                         \
222                  _ipl_blk.ssid, _ipl_blk.devno);                        \
223 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk);                        \
224 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
225         __ATTR(_name, (S_IRUGO | S_IWUSR),                              \
226                sys_##_prefix##_##_name##_show,                          \
227                sys_##_prefix##_##_name##_store)                         \
228
229 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
230 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value)                       \
231 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
232         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
233
234 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
235 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
236 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
237                 struct kobj_attribute *attr,                            \
238                 const char *buf, size_t len)                            \
239 {                                                                       \
240         unsigned long long value;                                       \
241         if (sscanf(buf, _fmt_in, &value) != 1)                          \
242                 return -EINVAL;                                         \
243         _value = value;                                                 \
244         return len;                                                     \
245 }                                                                       \
246 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
247         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
248                         sys_##_prefix##_##_name##_show,                 \
249                         sys_##_prefix##_##_name##_store)
250
251 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
252 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value)                      \
253 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
254                 struct kobj_attribute *attr,                            \
255                 const char *buf, size_t len)                            \
256 {                                                                       \
257         strncpy(_value, buf, sizeof(_value) - 1);                       \
258         strim(_value);                                                  \
259         return len;                                                     \
260 }                                                                       \
261 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
262         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
263                         sys_##_prefix##_##_name##_show,                 \
264                         sys_##_prefix##_##_name##_store)
265
266 static void make_attrs_ro(struct attribute **attrs)
267 {
268         while (*attrs) {
269                 (*attrs)->mode = S_IRUGO;
270                 attrs++;
271         }
272 }
273
274 /*
275  * ipl section
276  */
277
278 static __init enum ipl_type get_ipl_type(void)
279 {
280         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
281
282         if (ipl_flags & IPL_NSS_VALID)
283                 return IPL_TYPE_NSS;
284         if (!(ipl_flags & IPL_DEVNO_VALID))
285                 return IPL_TYPE_UNKNOWN;
286         if (!(ipl_flags & IPL_PARMBLOCK_VALID))
287                 return IPL_TYPE_CCW;
288         if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
289                 return IPL_TYPE_UNKNOWN;
290         if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
291                 return IPL_TYPE_UNKNOWN;
292         if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
293                 return IPL_TYPE_FCP_DUMP;
294         return IPL_TYPE_FCP;
295 }
296
297 struct ipl_info ipl_info;
298 EXPORT_SYMBOL_GPL(ipl_info);
299
300 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
301                              char *page)
302 {
303         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
304 }
305
306 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
307
308 /* VM IPL PARM routines */
309 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
310                                      const struct ipl_parameter_block *ipb)
311 {
312         int i;
313         size_t len;
314         char has_lowercase = 0;
315
316         len = 0;
317         if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
318             (ipb->ipl_info.ccw.vm_parm_len > 0)) {
319
320                 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
321                 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
322                 /* If at least one character is lowercase, we assume mixed
323                  * case; otherwise we convert everything to lowercase.
324                  */
325                 for (i = 0; i < len; i++)
326                         if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
327                             (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
328                             (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
329                                 has_lowercase = 1;
330                                 break;
331                         }
332                 if (!has_lowercase)
333                         EBC_TOLOWER(dest, len);
334                 EBCASC(dest, len);
335         }
336         dest[len] = 0;
337
338         return len;
339 }
340
341 size_t append_ipl_vmparm(char *dest, size_t size)
342 {
343         size_t rc;
344
345         rc = 0;
346         if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
347                 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
348         else
349                 dest[0] = 0;
350         return rc;
351 }
352
353 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
354                                 struct kobj_attribute *attr, char *page)
355 {
356         char parm[DIAG308_VMPARM_SIZE + 1] = {};
357
358         append_ipl_vmparm(parm, sizeof(parm));
359         return sprintf(page, "%s\n", parm);
360 }
361
362 static size_t scpdata_length(const char* buf, size_t count)
363 {
364         while (count) {
365                 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
366                         break;
367                 count--;
368         }
369         return count;
370 }
371
372 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
373                                          const struct ipl_parameter_block *ipb)
374 {
375         size_t count;
376         size_t i;
377         int has_lowercase;
378
379         count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
380                                              ipb->ipl_info.fcp.scp_data_len));
381         if (!count)
382                 goto out;
383
384         has_lowercase = 0;
385         for (i = 0; i < count; i++) {
386                 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
387                         count = 0;
388                         goto out;
389                 }
390                 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
391                         has_lowercase = 1;
392         }
393
394         if (has_lowercase)
395                 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
396         else
397                 for (i = 0; i < count; i++)
398                         dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
399 out:
400         dest[count] = '\0';
401         return count;
402 }
403
404 size_t append_ipl_scpdata(char *dest, size_t len)
405 {
406         size_t rc;
407
408         rc = 0;
409         if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
410                 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
411         else
412                 dest[0] = 0;
413         return rc;
414 }
415
416
417 static struct kobj_attribute sys_ipl_vm_parm_attr =
418         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
419
420 static ssize_t sys_ipl_device_show(struct kobject *kobj,
421                                    struct kobj_attribute *attr, char *page)
422 {
423         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
424
425         switch (ipl_info.type) {
426         case IPL_TYPE_CCW:
427                 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
428         case IPL_TYPE_FCP:
429         case IPL_TYPE_FCP_DUMP:
430                 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
431         default:
432                 return 0;
433         }
434 }
435
436 static struct kobj_attribute sys_ipl_device_attr =
437         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
438
439 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
440                                   struct bin_attribute *attr, char *buf,
441                                   loff_t off, size_t count)
442 {
443         return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
444                                         IPL_PARMBLOCK_SIZE);
445 }
446 static struct bin_attribute ipl_parameter_attr =
447         __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
448                    PAGE_SIZE);
449
450 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
451                                  struct bin_attribute *attr, char *buf,
452                                  loff_t off, size_t count)
453 {
454         unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
455         void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
456
457         return memory_read_from_buffer(buf, count, &off, scp_data, size);
458 }
459 static struct bin_attribute ipl_scp_data_attr =
460         __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
461
462 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
463         &ipl_parameter_attr,
464         &ipl_scp_data_attr,
465         NULL,
466 };
467
468 /* FCP ipl device attributes */
469
470 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
471                    IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
472 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
473                    IPL_PARMBLOCK_START->ipl_info.fcp.lun);
474 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
475                    IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
476 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
477                    IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
478
479 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
480                                      struct kobj_attribute *attr, char *page)
481 {
482         char loadparm[LOADPARM_LEN + 1] = {};
483
484         if (!sclp_ipl_info.is_valid)
485                 return sprintf(page, "#unknown#\n");
486         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
487         EBCASC(loadparm, LOADPARM_LEN);
488         strim(loadparm);
489         return sprintf(page, "%s\n", loadparm);
490 }
491
492 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
493         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
494
495 static struct attribute *ipl_fcp_attrs[] = {
496         &sys_ipl_type_attr.attr,
497         &sys_ipl_device_attr.attr,
498         &sys_ipl_fcp_wwpn_attr.attr,
499         &sys_ipl_fcp_lun_attr.attr,
500         &sys_ipl_fcp_bootprog_attr.attr,
501         &sys_ipl_fcp_br_lba_attr.attr,
502         &sys_ipl_ccw_loadparm_attr.attr,
503         NULL,
504 };
505
506 static struct attribute_group ipl_fcp_attr_group = {
507         .attrs = ipl_fcp_attrs,
508         .bin_attrs = ipl_fcp_bin_attrs,
509 };
510
511 /* CCW ipl device attributes */
512
513 static struct attribute *ipl_ccw_attrs_vm[] = {
514         &sys_ipl_type_attr.attr,
515         &sys_ipl_device_attr.attr,
516         &sys_ipl_ccw_loadparm_attr.attr,
517         &sys_ipl_vm_parm_attr.attr,
518         NULL,
519 };
520
521 static struct attribute *ipl_ccw_attrs_lpar[] = {
522         &sys_ipl_type_attr.attr,
523         &sys_ipl_device_attr.attr,
524         &sys_ipl_ccw_loadparm_attr.attr,
525         NULL,
526 };
527
528 static struct attribute_group ipl_ccw_attr_group_vm = {
529         .attrs = ipl_ccw_attrs_vm,
530 };
531
532 static struct attribute_group ipl_ccw_attr_group_lpar = {
533         .attrs = ipl_ccw_attrs_lpar
534 };
535
536 /* NSS ipl device attributes */
537
538 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
539
540 static struct attribute *ipl_nss_attrs[] = {
541         &sys_ipl_type_attr.attr,
542         &sys_ipl_nss_name_attr.attr,
543         &sys_ipl_ccw_loadparm_attr.attr,
544         &sys_ipl_vm_parm_attr.attr,
545         NULL,
546 };
547
548 static struct attribute_group ipl_nss_attr_group = {
549         .attrs = ipl_nss_attrs,
550 };
551
552 /* UNKNOWN ipl device attributes */
553
554 static struct attribute *ipl_unknown_attrs[] = {
555         &sys_ipl_type_attr.attr,
556         NULL,
557 };
558
559 static struct attribute_group ipl_unknown_attr_group = {
560         .attrs = ipl_unknown_attrs,
561 };
562
563 static struct kset *ipl_kset;
564
565 static void __ipl_run(void *unused)
566 {
567         diag308(DIAG308_LOAD_CLEAR, NULL);
568         if (MACHINE_IS_VM)
569                 __cpcmd("IPL", NULL, 0, NULL);
570         else if (ipl_info.type == IPL_TYPE_CCW)
571                 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
572 }
573
574 static void ipl_run(struct shutdown_trigger *trigger)
575 {
576         smp_call_ipl_cpu(__ipl_run, NULL);
577 }
578
579 static int __init ipl_init(void)
580 {
581         int rc;
582
583         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
584         if (!ipl_kset) {
585                 rc = -ENOMEM;
586                 goto out;
587         }
588         switch (ipl_info.type) {
589         case IPL_TYPE_CCW:
590                 if (MACHINE_IS_VM)
591                         rc = sysfs_create_group(&ipl_kset->kobj,
592                                                 &ipl_ccw_attr_group_vm);
593                 else
594                         rc = sysfs_create_group(&ipl_kset->kobj,
595                                                 &ipl_ccw_attr_group_lpar);
596                 break;
597         case IPL_TYPE_FCP:
598         case IPL_TYPE_FCP_DUMP:
599                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
600                 break;
601         case IPL_TYPE_NSS:
602                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
603                 break;
604         default:
605                 rc = sysfs_create_group(&ipl_kset->kobj,
606                                         &ipl_unknown_attr_group);
607                 break;
608         }
609 out:
610         if (rc)
611                 panic("ipl_init failed: rc = %i\n", rc);
612
613         return 0;
614 }
615
616 static struct shutdown_action __refdata ipl_action = {
617         .name   = SHUTDOWN_ACTION_IPL_STR,
618         .fn     = ipl_run,
619         .init   = ipl_init,
620 };
621
622 /*
623  * reipl shutdown action: Reboot Linux on shutdown.
624  */
625
626 /* VM IPL PARM attributes */
627 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
628                                           char *page)
629 {
630         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
631
632         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
633         return sprintf(page, "%s\n", vmparm);
634 }
635
636 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
637                                           size_t vmparm_max,
638                                           const char *buf, size_t len)
639 {
640         int i, ip_len;
641
642         /* ignore trailing newline */
643         ip_len = len;
644         if ((len > 0) && (buf[len - 1] == '\n'))
645                 ip_len--;
646
647         if (ip_len > vmparm_max)
648                 return -EINVAL;
649
650         /* parm is used to store kernel options, check for common chars */
651         for (i = 0; i < ip_len; i++)
652                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
653                         return -EINVAL;
654
655         memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
656         ipb->ipl_info.ccw.vm_parm_len = ip_len;
657         if (ip_len > 0) {
658                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
659                 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
660                 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
661         } else {
662                 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
663         }
664
665         return len;
666 }
667
668 /* NSS wrapper */
669 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
670                                      struct kobj_attribute *attr, char *page)
671 {
672         return reipl_generic_vmparm_show(reipl_block_nss, page);
673 }
674
675 static ssize_t reipl_nss_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_nss, 56, buf, len);
680 }
681
682 /* CCW wrapper */
683 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
684                                      struct kobj_attribute *attr, char *page)
685 {
686         return reipl_generic_vmparm_show(reipl_block_ccw, page);
687 }
688
689 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
690                                       struct kobj_attribute *attr,
691                                       const char *buf, size_t len)
692 {
693         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
694 }
695
696 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
697         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
698                                         reipl_nss_vmparm_store);
699 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
700         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
701                                         reipl_ccw_vmparm_store);
702
703 /* FCP reipl device attributes */
704
705 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
706                                       struct bin_attribute *attr,
707                                       char *buf, loff_t off, size_t count)
708 {
709         size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
710         void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
711
712         return memory_read_from_buffer(buf, count, &off, scp_data, size);
713 }
714
715 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
716                                        struct bin_attribute *attr,
717                                        char *buf, loff_t off, size_t count)
718 {
719         size_t scpdata_len = count;
720         size_t padding;
721
722
723         if (off)
724                 return -EINVAL;
725
726         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
727         if (scpdata_len % 8) {
728                 padding = 8 - (scpdata_len % 8);
729                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
730                        0, padding);
731                 scpdata_len += padding;
732         }
733
734         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
735         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
736         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
737
738         return count;
739 }
740 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
741         __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
742                    reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
743
744 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
745         &sys_reipl_fcp_scp_data_attr,
746         NULL,
747 };
748
749 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
750                    reipl_block_fcp->ipl_info.fcp.wwpn);
751 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
752                    reipl_block_fcp->ipl_info.fcp.lun);
753 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
754                    reipl_block_fcp->ipl_info.fcp.bootprog);
755 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
756                    reipl_block_fcp->ipl_info.fcp.br_lba);
757 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
758                    reipl_block_fcp->ipl_info.fcp.devno);
759
760 static void reipl_get_ascii_loadparm(char *loadparm,
761                                      struct ipl_parameter_block *ibp)
762 {
763         memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
764         EBCASC(loadparm, LOADPARM_LEN);
765         loadparm[LOADPARM_LEN] = 0;
766         strim(loadparm);
767 }
768
769 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
770                                            char *page)
771 {
772         char buf[LOADPARM_LEN + 1];
773
774         reipl_get_ascii_loadparm(buf, ipb);
775         return sprintf(page, "%s\n", buf);
776 }
777
778 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
779                                             const char *buf, size_t len)
780 {
781         int i, lp_len;
782
783         /* ignore trailing newline */
784         lp_len = len;
785         if ((len > 0) && (buf[len - 1] == '\n'))
786                 lp_len--;
787         /* loadparm can have max 8 characters and must not start with a blank */
788         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
789                 return -EINVAL;
790         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
791         for (i = 0; i < lp_len; i++) {
792                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
793                     (buf[i] == '.'))
794                         continue;
795                 return -EINVAL;
796         }
797         /* initialize loadparm with blanks */
798         memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
799         /* copy and convert to ebcdic */
800         memcpy(ipb->hdr.loadparm, buf, lp_len);
801         ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
802         return len;
803 }
804
805 /* FCP wrapper */
806 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
807                                        struct kobj_attribute *attr, char *page)
808 {
809         return reipl_generic_loadparm_show(reipl_block_fcp, page);
810 }
811
812 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
813                                         struct kobj_attribute *attr,
814                                         const char *buf, size_t len)
815 {
816         return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
817 }
818
819 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
820         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
821                                             reipl_fcp_loadparm_store);
822
823 static struct attribute *reipl_fcp_attrs[] = {
824         &sys_reipl_fcp_device_attr.attr,
825         &sys_reipl_fcp_wwpn_attr.attr,
826         &sys_reipl_fcp_lun_attr.attr,
827         &sys_reipl_fcp_bootprog_attr.attr,
828         &sys_reipl_fcp_br_lba_attr.attr,
829         &sys_reipl_fcp_loadparm_attr.attr,
830         NULL,
831 };
832
833 static struct attribute_group reipl_fcp_attr_group = {
834         .attrs = reipl_fcp_attrs,
835         .bin_attrs = reipl_fcp_bin_attrs,
836 };
837
838 /* CCW reipl device attributes */
839 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
840
841 /* NSS wrapper */
842 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
843                                        struct kobj_attribute *attr, char *page)
844 {
845         return reipl_generic_loadparm_show(reipl_block_nss, page);
846 }
847
848 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
849                                         struct kobj_attribute *attr,
850                                         const char *buf, size_t len)
851 {
852         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
853 }
854
855 /* CCW wrapper */
856 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
857                                        struct kobj_attribute *attr, char *page)
858 {
859         return reipl_generic_loadparm_show(reipl_block_ccw, page);
860 }
861
862 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
863                                         struct kobj_attribute *attr,
864                                         const char *buf, size_t len)
865 {
866         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
867 }
868
869 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
870         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
871                                             reipl_ccw_loadparm_store);
872
873 static struct attribute *reipl_ccw_attrs_vm[] = {
874         &sys_reipl_ccw_device_attr.attr,
875         &sys_reipl_ccw_loadparm_attr.attr,
876         &sys_reipl_ccw_vmparm_attr.attr,
877         NULL,
878 };
879
880 static struct attribute *reipl_ccw_attrs_lpar[] = {
881         &sys_reipl_ccw_device_attr.attr,
882         &sys_reipl_ccw_loadparm_attr.attr,
883         NULL,
884 };
885
886 static struct attribute_group reipl_ccw_attr_group_vm = {
887         .name  = IPL_CCW_STR,
888         .attrs = reipl_ccw_attrs_vm,
889 };
890
891 static struct attribute_group reipl_ccw_attr_group_lpar = {
892         .name  = IPL_CCW_STR,
893         .attrs = reipl_ccw_attrs_lpar,
894 };
895
896
897 /* NSS reipl device attributes */
898 static void reipl_get_ascii_nss_name(char *dst,
899                                      struct ipl_parameter_block *ipb)
900 {
901         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
902         EBCASC(dst, NSS_NAME_SIZE);
903         dst[NSS_NAME_SIZE] = 0;
904 }
905
906 static ssize_t reipl_nss_name_show(struct kobject *kobj,
907                                    struct kobj_attribute *attr, char *page)
908 {
909         char nss_name[NSS_NAME_SIZE + 1] = {};
910
911         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
912         return sprintf(page, "%s\n", nss_name);
913 }
914
915 static ssize_t reipl_nss_name_store(struct kobject *kobj,
916                                     struct kobj_attribute *attr,
917                                     const char *buf, size_t len)
918 {
919         int nss_len;
920
921         /* ignore trailing newline */
922         nss_len = len;
923         if ((len > 0) && (buf[len - 1] == '\n'))
924                 nss_len--;
925
926         if (nss_len > NSS_NAME_SIZE)
927                 return -EINVAL;
928
929         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
930         if (nss_len > 0) {
931                 reipl_block_nss->ipl_info.ccw.vm_flags |=
932                         DIAG308_VM_FLAGS_NSS_VALID;
933                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
934                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
935                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
936         } else {
937                 reipl_block_nss->ipl_info.ccw.vm_flags &=
938                         ~DIAG308_VM_FLAGS_NSS_VALID;
939         }
940
941         return len;
942 }
943
944 static struct kobj_attribute sys_reipl_nss_name_attr =
945         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
946                                         reipl_nss_name_store);
947
948 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
949         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
950                                             reipl_nss_loadparm_store);
951
952 static struct attribute *reipl_nss_attrs[] = {
953         &sys_reipl_nss_name_attr.attr,
954         &sys_reipl_nss_loadparm_attr.attr,
955         &sys_reipl_nss_vmparm_attr.attr,
956         NULL,
957 };
958
959 static struct attribute_group reipl_nss_attr_group = {
960         .name  = IPL_NSS_STR,
961         .attrs = reipl_nss_attrs,
962 };
963
964 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
965 {
966         reipl_block_actual = reipl_block;
967         os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
968                           reipl_block->hdr.len);
969 }
970
971 /* reipl type */
972
973 static int reipl_set_type(enum ipl_type type)
974 {
975         if (!(reipl_capabilities & type))
976                 return -EINVAL;
977
978         switch(type) {
979         case IPL_TYPE_CCW:
980                 if (diag308_set_works)
981                         reipl_method = REIPL_METHOD_CCW_DIAG;
982                 else if (MACHINE_IS_VM)
983                         reipl_method = REIPL_METHOD_CCW_VM;
984                 else
985                         reipl_method = REIPL_METHOD_CCW_CIO;
986                 set_reipl_block_actual(reipl_block_ccw);
987                 break;
988         case IPL_TYPE_FCP:
989                 if (diag308_set_works)
990                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
991                 else if (MACHINE_IS_VM)
992                         reipl_method = REIPL_METHOD_FCP_RO_VM;
993                 else
994                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
995                 set_reipl_block_actual(reipl_block_fcp);
996                 break;
997         case IPL_TYPE_FCP_DUMP:
998                 reipl_method = REIPL_METHOD_FCP_DUMP;
999                 break;
1000         case IPL_TYPE_NSS:
1001                 if (diag308_set_works)
1002                         reipl_method = REIPL_METHOD_NSS_DIAG;
1003                 else
1004                         reipl_method = REIPL_METHOD_NSS;
1005                 set_reipl_block_actual(reipl_block_nss);
1006                 break;
1007         case IPL_TYPE_UNKNOWN:
1008                 reipl_method = REIPL_METHOD_DEFAULT;
1009                 break;
1010         default:
1011                 BUG();
1012         }
1013         reipl_type = type;
1014         return 0;
1015 }
1016
1017 static ssize_t reipl_type_show(struct kobject *kobj,
1018                                struct kobj_attribute *attr, char *page)
1019 {
1020         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1021 }
1022
1023 static ssize_t reipl_type_store(struct kobject *kobj,
1024                                 struct kobj_attribute *attr,
1025                                 const char *buf, size_t len)
1026 {
1027         int rc = -EINVAL;
1028
1029         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1030                 rc = reipl_set_type(IPL_TYPE_CCW);
1031         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1032                 rc = reipl_set_type(IPL_TYPE_FCP);
1033         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1034                 rc = reipl_set_type(IPL_TYPE_NSS);
1035         return (rc != 0) ? rc : len;
1036 }
1037
1038 static struct kobj_attribute reipl_type_attr =
1039         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1040
1041 static struct kset *reipl_kset;
1042 static struct kset *reipl_fcp_kset;
1043
1044 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1045                            const enum ipl_method m)
1046 {
1047         char loadparm[LOADPARM_LEN + 1] = {};
1048         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1049         char nss_name[NSS_NAME_SIZE + 1] = {};
1050         size_t pos = 0;
1051
1052         reipl_get_ascii_loadparm(loadparm, ipb);
1053         reipl_get_ascii_nss_name(nss_name, ipb);
1054         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1055
1056         switch (m) {
1057         case REIPL_METHOD_CCW_VM:
1058                 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1059                 break;
1060         case REIPL_METHOD_NSS:
1061                 pos = sprintf(dst, "IPL %s", nss_name);
1062                 break;
1063         default:
1064                 break;
1065         }
1066         if (strlen(loadparm) > 0)
1067                 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1068         if (strlen(vmparm) > 0)
1069                 sprintf(dst + pos, " PARM %s", vmparm);
1070 }
1071
1072 static void __reipl_run(void *unused)
1073 {
1074         struct ccw_dev_id devid;
1075         static char buf[128];
1076
1077         switch (reipl_method) {
1078         case REIPL_METHOD_CCW_CIO:
1079                 devid.ssid  = reipl_block_ccw->ipl_info.ccw.ssid;
1080                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1081                 reipl_ccw_dev(&devid);
1082                 break;
1083         case REIPL_METHOD_CCW_VM:
1084                 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1085                 __cpcmd(buf, NULL, 0, NULL);
1086                 break;
1087         case REIPL_METHOD_CCW_DIAG:
1088                 diag308(DIAG308_SET, reipl_block_ccw);
1089                 diag308(DIAG308_LOAD_CLEAR, NULL);
1090                 break;
1091         case REIPL_METHOD_FCP_RW_DIAG:
1092                 diag308(DIAG308_SET, reipl_block_fcp);
1093                 diag308(DIAG308_LOAD_CLEAR, NULL);
1094                 break;
1095         case REIPL_METHOD_FCP_RO_DIAG:
1096                 diag308(DIAG308_LOAD_CLEAR, NULL);
1097                 break;
1098         case REIPL_METHOD_FCP_RO_VM:
1099                 __cpcmd("IPL", NULL, 0, NULL);
1100                 break;
1101         case REIPL_METHOD_NSS_DIAG:
1102                 diag308(DIAG308_SET, reipl_block_nss);
1103                 diag308(DIAG308_LOAD_CLEAR, NULL);
1104                 break;
1105         case REIPL_METHOD_NSS:
1106                 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1107                 __cpcmd(buf, NULL, 0, NULL);
1108                 break;
1109         case REIPL_METHOD_DEFAULT:
1110                 if (MACHINE_IS_VM)
1111                         __cpcmd("IPL", NULL, 0, NULL);
1112                 diag308(DIAG308_LOAD_CLEAR, NULL);
1113                 break;
1114         case REIPL_METHOD_FCP_DUMP:
1115                 break;
1116         }
1117         disabled_wait((unsigned long) __builtin_return_address(0));
1118 }
1119
1120 static void reipl_run(struct shutdown_trigger *trigger)
1121 {
1122         smp_call_ipl_cpu(__reipl_run, NULL);
1123 }
1124
1125 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1126 {
1127         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1128         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1129         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1130         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1131 }
1132
1133 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1134 {
1135         /* LOADPARM */
1136         /* check if read scp info worked and set loadparm */
1137         if (sclp_ipl_info.is_valid)
1138                 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1139         else
1140                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1141                 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1142         ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1143
1144         /* VM PARM */
1145         if (MACHINE_IS_VM && diag308_set_works &&
1146             (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1147
1148                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1149                 ipb->ipl_info.ccw.vm_parm_len =
1150                                         ipl_block.ipl_info.ccw.vm_parm_len;
1151                 memcpy(ipb->ipl_info.ccw.vm_parm,
1152                        ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1153         }
1154 }
1155
1156 static int __init reipl_nss_init(void)
1157 {
1158         int rc;
1159
1160         if (!MACHINE_IS_VM)
1161                 return 0;
1162
1163         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1164         if (!reipl_block_nss)
1165                 return -ENOMEM;
1166
1167         if (!diag308_set_works)
1168                 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1169
1170         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1171         if (rc)
1172                 return rc;
1173
1174         reipl_block_ccw_init(reipl_block_nss);
1175         if (ipl_info.type == IPL_TYPE_NSS) {
1176                 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1177                         ' ', NSS_NAME_SIZE);
1178                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1179                         kernel_nss_name, strlen(kernel_nss_name));
1180                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1181                 reipl_block_nss->ipl_info.ccw.vm_flags |=
1182                         DIAG308_VM_FLAGS_NSS_VALID;
1183
1184                 reipl_block_ccw_fill_parms(reipl_block_nss);
1185         }
1186
1187         reipl_capabilities |= IPL_TYPE_NSS;
1188         return 0;
1189 }
1190
1191 static int __init reipl_ccw_init(void)
1192 {
1193         int rc;
1194
1195         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1196         if (!reipl_block_ccw)
1197                 return -ENOMEM;
1198
1199         if (MACHINE_IS_VM) {
1200                 if (!diag308_set_works)
1201                         sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1202                 rc = sysfs_create_group(&reipl_kset->kobj,
1203                                         &reipl_ccw_attr_group_vm);
1204         } else {
1205                 if(!diag308_set_works)
1206                         sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1207                 rc = sysfs_create_group(&reipl_kset->kobj,
1208                                         &reipl_ccw_attr_group_lpar);
1209         }
1210         if (rc)
1211                 return rc;
1212
1213         reipl_block_ccw_init(reipl_block_ccw);
1214         if (ipl_info.type == IPL_TYPE_CCW) {
1215                 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
1216                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1217                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1218         }
1219
1220         reipl_capabilities |= IPL_TYPE_CCW;
1221         return 0;
1222 }
1223
1224 static int __init reipl_fcp_init(void)
1225 {
1226         int rc;
1227
1228         if (!diag308_set_works) {
1229                 if (ipl_info.type == IPL_TYPE_FCP) {
1230                         make_attrs_ro(reipl_fcp_attrs);
1231                         sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1232                 } else
1233                         return 0;
1234         }
1235
1236         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1237         if (!reipl_block_fcp)
1238                 return -ENOMEM;
1239
1240         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1241         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1242                                              &reipl_kset->kobj);
1243         if (!reipl_fcp_kset) {
1244                 free_page((unsigned long) reipl_block_fcp);
1245                 return -ENOMEM;
1246         }
1247
1248         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1249         if (rc) {
1250                 kset_unregister(reipl_fcp_kset);
1251                 free_page((unsigned long) reipl_block_fcp);
1252                 return rc;
1253         }
1254
1255         if (ipl_info.type == IPL_TYPE_FCP) {
1256                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1257                 /*
1258                  * Fix loadparm: There are systems where the (SCSI) LOADPARM
1259                  * is invalid in the SCSI IPL parameter block, so take it
1260                  * always from sclp_ipl_info.
1261                  */
1262                 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1263                        LOADPARM_LEN);
1264         } else {
1265                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1266                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1267                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1268                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1269                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1270         }
1271         reipl_capabilities |= IPL_TYPE_FCP;
1272         return 0;
1273 }
1274
1275 static int __init reipl_type_init(void)
1276 {
1277         enum ipl_type reipl_type = ipl_info.type;
1278         struct ipl_parameter_block *reipl_block;
1279         unsigned long size;
1280
1281         reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1282         if (!reipl_block)
1283                 goto out;
1284         /*
1285          * If we have an OS info reipl block, this will be used
1286          */
1287         if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1288                 memcpy(reipl_block_fcp, reipl_block, size);
1289                 reipl_type = IPL_TYPE_FCP;
1290         } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1291                 memcpy(reipl_block_ccw, reipl_block, size);
1292                 reipl_type = IPL_TYPE_CCW;
1293         }
1294 out:
1295         return reipl_set_type(reipl_type);
1296 }
1297
1298 static int __init reipl_init(void)
1299 {
1300         int rc;
1301
1302         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1303         if (!reipl_kset)
1304                 return -ENOMEM;
1305         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1306         if (rc) {
1307                 kset_unregister(reipl_kset);
1308                 return rc;
1309         }
1310         rc = reipl_ccw_init();
1311         if (rc)
1312                 return rc;
1313         rc = reipl_fcp_init();
1314         if (rc)
1315                 return rc;
1316         rc = reipl_nss_init();
1317         if (rc)
1318                 return rc;
1319         return reipl_type_init();
1320 }
1321
1322 static struct shutdown_action __refdata reipl_action = {
1323         .name   = SHUTDOWN_ACTION_REIPL_STR,
1324         .fn     = reipl_run,
1325         .init   = reipl_init,
1326 };
1327
1328 /*
1329  * dump shutdown action: Dump Linux on shutdown.
1330  */
1331
1332 /* FCP dump device attributes */
1333
1334 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1335                    dump_block_fcp->ipl_info.fcp.wwpn);
1336 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1337                    dump_block_fcp->ipl_info.fcp.lun);
1338 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1339                    dump_block_fcp->ipl_info.fcp.bootprog);
1340 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1341                    dump_block_fcp->ipl_info.fcp.br_lba);
1342 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1343                    dump_block_fcp->ipl_info.fcp.devno);
1344
1345 static struct attribute *dump_fcp_attrs[] = {
1346         &sys_dump_fcp_device_attr.attr,
1347         &sys_dump_fcp_wwpn_attr.attr,
1348         &sys_dump_fcp_lun_attr.attr,
1349         &sys_dump_fcp_bootprog_attr.attr,
1350         &sys_dump_fcp_br_lba_attr.attr,
1351         NULL,
1352 };
1353
1354 static struct attribute_group dump_fcp_attr_group = {
1355         .name  = IPL_FCP_STR,
1356         .attrs = dump_fcp_attrs,
1357 };
1358
1359 /* CCW dump device attributes */
1360 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1361
1362 static struct attribute *dump_ccw_attrs[] = {
1363         &sys_dump_ccw_device_attr.attr,
1364         NULL,
1365 };
1366
1367 static struct attribute_group dump_ccw_attr_group = {
1368         .name  = IPL_CCW_STR,
1369         .attrs = dump_ccw_attrs,
1370 };
1371
1372 /* dump type */
1373
1374 static int dump_set_type(enum dump_type type)
1375 {
1376         if (!(dump_capabilities & type))
1377                 return -EINVAL;
1378         switch (type) {
1379         case DUMP_TYPE_CCW:
1380                 if (diag308_set_works)
1381                         dump_method = DUMP_METHOD_CCW_DIAG;
1382                 else if (MACHINE_IS_VM)
1383                         dump_method = DUMP_METHOD_CCW_VM;
1384                 else
1385                         dump_method = DUMP_METHOD_CCW_CIO;
1386                 break;
1387         case DUMP_TYPE_FCP:
1388                 dump_method = DUMP_METHOD_FCP_DIAG;
1389                 break;
1390         default:
1391                 dump_method = DUMP_METHOD_NONE;
1392         }
1393         dump_type = type;
1394         return 0;
1395 }
1396
1397 static ssize_t dump_type_show(struct kobject *kobj,
1398                               struct kobj_attribute *attr, char *page)
1399 {
1400         return sprintf(page, "%s\n", dump_type_str(dump_type));
1401 }
1402
1403 static ssize_t dump_type_store(struct kobject *kobj,
1404                                struct kobj_attribute *attr,
1405                                const char *buf, size_t len)
1406 {
1407         int rc = -EINVAL;
1408
1409         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1410                 rc = dump_set_type(DUMP_TYPE_NONE);
1411         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1412                 rc = dump_set_type(DUMP_TYPE_CCW);
1413         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1414                 rc = dump_set_type(DUMP_TYPE_FCP);
1415         return (rc != 0) ? rc : len;
1416 }
1417
1418 static struct kobj_attribute dump_type_attr =
1419         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1420
1421 static struct kset *dump_kset;
1422
1423 static void diag308_dump(void *dump_block)
1424 {
1425         diag308(DIAG308_SET, dump_block);
1426         while (1) {
1427                 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1428                         break;
1429                 udelay_simple(USEC_PER_SEC);
1430         }
1431 }
1432
1433 static void __dump_run(void *unused)
1434 {
1435         struct ccw_dev_id devid;
1436         static char buf[100];
1437
1438         switch (dump_method) {
1439         case DUMP_METHOD_CCW_CIO:
1440                 devid.ssid  = dump_block_ccw->ipl_info.ccw.ssid;
1441                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1442                 reipl_ccw_dev(&devid);
1443                 break;
1444         case DUMP_METHOD_CCW_VM:
1445                 sprintf(buf, "STORE STATUS");
1446                 __cpcmd(buf, NULL, 0, NULL);
1447                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1448                 __cpcmd(buf, NULL, 0, NULL);
1449                 break;
1450         case DUMP_METHOD_CCW_DIAG:
1451                 diag308_dump(dump_block_ccw);
1452                 break;
1453         case DUMP_METHOD_FCP_DIAG:
1454                 diag308_dump(dump_block_fcp);
1455                 break;
1456         default:
1457                 break;
1458         }
1459 }
1460
1461 static void dump_run(struct shutdown_trigger *trigger)
1462 {
1463         if (dump_method == DUMP_METHOD_NONE)
1464                 return;
1465         smp_send_stop();
1466         smp_call_ipl_cpu(__dump_run, NULL);
1467 }
1468
1469 static int __init dump_ccw_init(void)
1470 {
1471         int rc;
1472
1473         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1474         if (!dump_block_ccw)
1475                 return -ENOMEM;
1476         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1477         if (rc) {
1478                 free_page((unsigned long)dump_block_ccw);
1479                 return rc;
1480         }
1481         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1482         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1483         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1484         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1485         dump_capabilities |= DUMP_TYPE_CCW;
1486         return 0;
1487 }
1488
1489 static int __init dump_fcp_init(void)
1490 {
1491         int rc;
1492
1493         if (!sclp_ipl_info.has_dump)
1494                 return 0; /* LDIPL DUMP is not installed */
1495         if (!diag308_set_works)
1496                 return 0;
1497         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1498         if (!dump_block_fcp)
1499                 return -ENOMEM;
1500         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1501         if (rc) {
1502                 free_page((unsigned long)dump_block_fcp);
1503                 return rc;
1504         }
1505         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1506         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1507         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1508         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1509         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1510         dump_capabilities |= DUMP_TYPE_FCP;
1511         return 0;
1512 }
1513
1514 static int __init dump_init(void)
1515 {
1516         int rc;
1517
1518         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1519         if (!dump_kset)
1520                 return -ENOMEM;
1521         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1522         if (rc) {
1523                 kset_unregister(dump_kset);
1524                 return rc;
1525         }
1526         rc = dump_ccw_init();
1527         if (rc)
1528                 return rc;
1529         rc = dump_fcp_init();
1530         if (rc)
1531                 return rc;
1532         dump_set_type(DUMP_TYPE_NONE);
1533         return 0;
1534 }
1535
1536 static struct shutdown_action __refdata dump_action = {
1537         .name   = SHUTDOWN_ACTION_DUMP_STR,
1538         .fn     = dump_run,
1539         .init   = dump_init,
1540 };
1541
1542 static void dump_reipl_run(struct shutdown_trigger *trigger)
1543 {
1544         unsigned long ipib = (unsigned long) reipl_block_actual;
1545         unsigned int csum;
1546
1547         csum = (__force unsigned int)
1548                csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1549         mem_assign_absolute(S390_lowcore.ipib, ipib);
1550         mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1551         dump_run(trigger);
1552 }
1553
1554 static int __init dump_reipl_init(void)
1555 {
1556         if (!diag308_set_works)
1557                 return -EOPNOTSUPP;
1558         else
1559                 return 0;
1560 }
1561
1562 static struct shutdown_action __refdata dump_reipl_action = {
1563         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1564         .fn     = dump_reipl_run,
1565         .init   = dump_reipl_init,
1566 };
1567
1568 /*
1569  * vmcmd shutdown action: Trigger vm command on shutdown.
1570  */
1571
1572 static char vmcmd_on_reboot[128];
1573 static char vmcmd_on_panic[128];
1574 static char vmcmd_on_halt[128];
1575 static char vmcmd_on_poff[128];
1576 static char vmcmd_on_restart[128];
1577
1578 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1579 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1580 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1581 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1582 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1583
1584 static struct attribute *vmcmd_attrs[] = {
1585         &sys_vmcmd_on_reboot_attr.attr,
1586         &sys_vmcmd_on_panic_attr.attr,
1587         &sys_vmcmd_on_halt_attr.attr,
1588         &sys_vmcmd_on_poff_attr.attr,
1589         &sys_vmcmd_on_restart_attr.attr,
1590         NULL,
1591 };
1592
1593 static struct attribute_group vmcmd_attr_group = {
1594         .attrs = vmcmd_attrs,
1595 };
1596
1597 static struct kset *vmcmd_kset;
1598
1599 static void vmcmd_run(struct shutdown_trigger *trigger)
1600 {
1601         char *cmd;
1602
1603         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1604                 cmd = vmcmd_on_reboot;
1605         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1606                 cmd = vmcmd_on_panic;
1607         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1608                 cmd = vmcmd_on_halt;
1609         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1610                 cmd = vmcmd_on_poff;
1611         else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1612                 cmd = vmcmd_on_restart;
1613         else
1614                 return;
1615
1616         if (strlen(cmd) == 0)
1617                 return;
1618         __cpcmd(cmd, NULL, 0, NULL);
1619 }
1620
1621 static int vmcmd_init(void)
1622 {
1623         if (!MACHINE_IS_VM)
1624                 return -EOPNOTSUPP;
1625         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1626         if (!vmcmd_kset)
1627                 return -ENOMEM;
1628         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1629 }
1630
1631 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1632                                               vmcmd_run, vmcmd_init};
1633
1634 /*
1635  * stop shutdown action: Stop Linux on shutdown.
1636  */
1637
1638 static void stop_run(struct shutdown_trigger *trigger)
1639 {
1640         if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1641             strcmp(trigger->name, ON_RESTART_STR) == 0)
1642                 disabled_wait((unsigned long) __builtin_return_address(0));
1643         smp_stop_cpu();
1644 }
1645
1646 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1647                                              stop_run, NULL};
1648
1649 /* action list */
1650
1651 static struct shutdown_action *shutdown_actions_list[] = {
1652         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1653         &vmcmd_action, &stop_action};
1654 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1655
1656 /*
1657  * Trigger section
1658  */
1659
1660 static struct kset *shutdown_actions_kset;
1661
1662 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1663                        size_t len)
1664 {
1665         int i;
1666
1667         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1668                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1669                         if (shutdown_actions_list[i]->init_rc) {
1670                                 return shutdown_actions_list[i]->init_rc;
1671                         } else {
1672                                 trigger->action = shutdown_actions_list[i];
1673                                 return len;
1674                         }
1675                 }
1676         }
1677         return -EINVAL;
1678 }
1679
1680 /* on reipl */
1681
1682 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1683                                                     &reipl_action};
1684
1685 static ssize_t on_reboot_show(struct kobject *kobj,
1686                               struct kobj_attribute *attr, char *page)
1687 {
1688         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1689 }
1690
1691 static ssize_t on_reboot_store(struct kobject *kobj,
1692                                struct kobj_attribute *attr,
1693                                const char *buf, size_t len)
1694 {
1695         return set_trigger(buf, &on_reboot_trigger, len);
1696 }
1697 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1698
1699 static void do_machine_restart(char *__unused)
1700 {
1701         smp_send_stop();
1702         on_reboot_trigger.action->fn(&on_reboot_trigger);
1703         reipl_run(NULL);
1704 }
1705 void (*_machine_restart)(char *command) = do_machine_restart;
1706
1707 /* on panic */
1708
1709 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1710
1711 static ssize_t on_panic_show(struct kobject *kobj,
1712                              struct kobj_attribute *attr, char *page)
1713 {
1714         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1715 }
1716
1717 static ssize_t on_panic_store(struct kobject *kobj,
1718                               struct kobj_attribute *attr,
1719                               const char *buf, size_t len)
1720 {
1721         return set_trigger(buf, &on_panic_trigger, len);
1722 }
1723 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1724
1725 static void do_panic(void)
1726 {
1727         lgr_info_log();
1728         on_panic_trigger.action->fn(&on_panic_trigger);
1729         stop_run(&on_panic_trigger);
1730 }
1731
1732 /* on restart */
1733
1734 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1735         &stop_action};
1736
1737 static ssize_t on_restart_show(struct kobject *kobj,
1738                                struct kobj_attribute *attr, char *page)
1739 {
1740         return sprintf(page, "%s\n", on_restart_trigger.action->name);
1741 }
1742
1743 static ssize_t on_restart_store(struct kobject *kobj,
1744                                 struct kobj_attribute *attr,
1745                                 const char *buf, size_t len)
1746 {
1747         return set_trigger(buf, &on_restart_trigger, len);
1748 }
1749 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1750
1751 static void __do_restart(void *ignore)
1752 {
1753         __arch_local_irq_stosm(0x04); /* enable DAT */
1754         smp_send_stop();
1755 #ifdef CONFIG_CRASH_DUMP
1756         crash_kexec(NULL);
1757 #endif
1758         on_restart_trigger.action->fn(&on_restart_trigger);
1759         stop_run(&on_restart_trigger);
1760 }
1761
1762 void do_restart(void)
1763 {
1764         tracing_off();
1765         debug_locks_off();
1766         lgr_info_log();
1767         smp_call_online_cpu(__do_restart, NULL);
1768 }
1769
1770 /* on halt */
1771
1772 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1773
1774 static ssize_t on_halt_show(struct kobject *kobj,
1775                             struct kobj_attribute *attr, char *page)
1776 {
1777         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1778 }
1779
1780 static ssize_t on_halt_store(struct kobject *kobj,
1781                              struct kobj_attribute *attr,
1782                              const char *buf, size_t len)
1783 {
1784         return set_trigger(buf, &on_halt_trigger, len);
1785 }
1786 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1787
1788 static void do_machine_halt(void)
1789 {
1790         smp_send_stop();
1791         on_halt_trigger.action->fn(&on_halt_trigger);
1792         stop_run(&on_halt_trigger);
1793 }
1794 void (*_machine_halt)(void) = do_machine_halt;
1795
1796 /* on power off */
1797
1798 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1799
1800 static ssize_t on_poff_show(struct kobject *kobj,
1801                             struct kobj_attribute *attr, char *page)
1802 {
1803         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1804 }
1805
1806 static ssize_t on_poff_store(struct kobject *kobj,
1807                              struct kobj_attribute *attr,
1808                              const char *buf, size_t len)
1809 {
1810         return set_trigger(buf, &on_poff_trigger, len);
1811 }
1812 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1813
1814 static void do_machine_power_off(void)
1815 {
1816         smp_send_stop();
1817         on_poff_trigger.action->fn(&on_poff_trigger);
1818         stop_run(&on_poff_trigger);
1819 }
1820 void (*_machine_power_off)(void) = do_machine_power_off;
1821
1822 static struct attribute *shutdown_action_attrs[] = {
1823         &on_restart_attr.attr,
1824         &on_reboot_attr.attr,
1825         &on_panic_attr.attr,
1826         &on_halt_attr.attr,
1827         &on_poff_attr.attr,
1828         NULL,
1829 };
1830
1831 static struct attribute_group shutdown_action_attr_group = {
1832         .attrs = shutdown_action_attrs,
1833 };
1834
1835 static void __init shutdown_triggers_init(void)
1836 {
1837         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1838                                                     firmware_kobj);
1839         if (!shutdown_actions_kset)
1840                 goto fail;
1841         if (sysfs_create_group(&shutdown_actions_kset->kobj,
1842                                &shutdown_action_attr_group))
1843                 goto fail;
1844         return;
1845 fail:
1846         panic("shutdown_triggers_init failed\n");
1847 }
1848
1849 static void __init shutdown_actions_init(void)
1850 {
1851         int i;
1852
1853         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1854                 if (!shutdown_actions_list[i]->init)
1855                         continue;
1856                 shutdown_actions_list[i]->init_rc =
1857                         shutdown_actions_list[i]->init();
1858         }
1859 }
1860
1861 static int __init s390_ipl_init(void)
1862 {
1863         char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1864
1865         sclp_early_get_ipl_info(&sclp_ipl_info);
1866         /*
1867          * Fix loadparm: There are systems where the (SCSI) LOADPARM
1868          * returned by read SCP info is invalid (contains EBCDIC blanks)
1869          * when the system has been booted via diag308. In that case we use
1870          * the value from diag308, if available.
1871          *
1872          * There are also systems where diag308 store does not work in
1873          * case the system is booted from HMC. Fortunately in this case
1874          * READ SCP info provides the correct value.
1875          */
1876         if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1877             diag308_set_works)
1878                 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1879                        LOADPARM_LEN);
1880         shutdown_actions_init();
1881         shutdown_triggers_init();
1882         return 0;
1883 }
1884
1885 __initcall(s390_ipl_init);
1886
1887 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1888 {
1889         int sx, dx;
1890
1891         dx = 0;
1892         for (sx = 0; src[sx] != 0; sx++) {
1893                 if (src[sx] == '"')
1894                         continue;
1895                 dst[dx++] = src[sx];
1896                 if (dx >= n)
1897                         break;
1898         }
1899 }
1900
1901 static int __init vmcmd_on_reboot_setup(char *str)
1902 {
1903         if (!MACHINE_IS_VM)
1904                 return 1;
1905         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1906         vmcmd_on_reboot[127] = 0;
1907         on_reboot_trigger.action = &vmcmd_action;
1908         return 1;
1909 }
1910 __setup("vmreboot=", vmcmd_on_reboot_setup);
1911
1912 static int __init vmcmd_on_panic_setup(char *str)
1913 {
1914         if (!MACHINE_IS_VM)
1915                 return 1;
1916         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1917         vmcmd_on_panic[127] = 0;
1918         on_panic_trigger.action = &vmcmd_action;
1919         return 1;
1920 }
1921 __setup("vmpanic=", vmcmd_on_panic_setup);
1922
1923 static int __init vmcmd_on_halt_setup(char *str)
1924 {
1925         if (!MACHINE_IS_VM)
1926                 return 1;
1927         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1928         vmcmd_on_halt[127] = 0;
1929         on_halt_trigger.action = &vmcmd_action;
1930         return 1;
1931 }
1932 __setup("vmhalt=", vmcmd_on_halt_setup);
1933
1934 static int __init vmcmd_on_poff_setup(char *str)
1935 {
1936         if (!MACHINE_IS_VM)
1937                 return 1;
1938         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1939         vmcmd_on_poff[127] = 0;
1940         on_poff_trigger.action = &vmcmd_action;
1941         return 1;
1942 }
1943 __setup("vmpoff=", vmcmd_on_poff_setup);
1944
1945 static int on_panic_notify(struct notifier_block *self,
1946                            unsigned long event, void *data)
1947 {
1948         do_panic();
1949         return NOTIFY_OK;
1950 }
1951
1952 static struct notifier_block on_panic_nb = {
1953         .notifier_call = on_panic_notify,
1954         .priority = INT_MIN,
1955 };
1956
1957 void __init setup_ipl(void)
1958 {
1959         ipl_info.type = get_ipl_type();
1960         switch (ipl_info.type) {
1961         case IPL_TYPE_CCW:
1962                 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
1963                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1964                 break;
1965         case IPL_TYPE_FCP:
1966         case IPL_TYPE_FCP_DUMP:
1967                 ipl_info.data.fcp.dev_id.ssid = 0;
1968                 ipl_info.data.fcp.dev_id.devno =
1969                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1970                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1971                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1972                 break;
1973         case IPL_TYPE_NSS:
1974                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1975                         sizeof(ipl_info.data.nss.name));
1976                 break;
1977         case IPL_TYPE_UNKNOWN:
1978                 /* We have no info to copy */
1979                 break;
1980         }
1981         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1982 }
1983
1984 void __init ipl_update_parameters(void)
1985 {
1986         int rc;
1987
1988         rc = diag308(DIAG308_STORE, &ipl_block);
1989         if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1990                 diag308_set_works = 1;
1991 }
1992
1993 void __init ipl_verify_parameters(void)
1994 {
1995         struct cio_iplinfo iplinfo;
1996
1997         if (cio_get_iplinfo(&iplinfo))
1998                 return;
1999
2000         ipl_ssid = iplinfo.ssid;
2001         ipl_devno = iplinfo.devno;
2002         ipl_flags |= IPL_DEVNO_VALID;
2003         if (!iplinfo.is_qdio)
2004                 return;
2005         ipl_flags |= IPL_PARMBLOCK_VALID;
2006 }
2007
2008 static LIST_HEAD(rcall);
2009 static DEFINE_MUTEX(rcall_mutex);
2010
2011 void register_reset_call(struct reset_call *reset)
2012 {
2013         mutex_lock(&rcall_mutex);
2014         list_add(&reset->list, &rcall);
2015         mutex_unlock(&rcall_mutex);
2016 }
2017 EXPORT_SYMBOL_GPL(register_reset_call);
2018
2019 void unregister_reset_call(struct reset_call *reset)
2020 {
2021         mutex_lock(&rcall_mutex);
2022         list_del(&reset->list);
2023         mutex_unlock(&rcall_mutex);
2024 }
2025 EXPORT_SYMBOL_GPL(unregister_reset_call);
2026
2027 static void do_reset_calls(void)
2028 {
2029         struct reset_call *reset;
2030
2031         if (diag308_set_works) {
2032                 diag308_reset();
2033                 return;
2034         }
2035         list_for_each_entry(reset, &rcall, list)
2036                 reset->fn();
2037 }
2038
2039 void s390_reset_system(void)
2040 {
2041         struct lowcore *lc;
2042
2043         lc = (struct lowcore *)(unsigned long) store_prefix();
2044
2045         /* Stack for interrupt/machine check handler */
2046         lc->panic_stack = S390_lowcore.panic_stack;
2047
2048         /* Disable prefixing */
2049         set_prefix(0);
2050
2051         /* Disable lowcore protection */
2052         __ctl_clear_bit(0,28);
2053
2054         /* Set new machine check handler */
2055         S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2056         S390_lowcore.mcck_new_psw.addr =
2057                 (unsigned long) s390_base_mcck_handler;
2058
2059         /* Set new program check handler */
2060         S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2061         S390_lowcore.program_new_psw.addr =
2062                 (unsigned long) s390_base_pgm_handler;
2063
2064         do_reset_calls();
2065 }