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[S390] arch/s390/kernel/ipl.c: correct error detection check
[linux-block.git] / arch / s390 / kernel / ipl.c
CommitLineData
ff6b8ea6
MH		 1/*
2 * arch/s390/kernel/ipl.c
3 * ipl/reipl/dump support for Linux on s390.
4 *
99ca4e58 5 * Copyright IBM Corp. 2005,2007
ff6b8ea6
MH		 6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 * Heiko Carstens <heiko.carstens@de.ibm.com>
8 * Volker Sameske <sameske@de.ibm.com>
9 */
10
11#include <linux/types.h>
12#include <linux/module.h>
13#include <linux/device.h>
14#include <linux/delay.h>
15#include <linux/reboot.h>
03a4d208 16#include <linux/ctype.h>
0788fea4 17#include <linux/fs.h>
5a0e3ad6 18#include <linux/gfp.h>
46b05d26 19#include <asm/ipl.h>
ff6b8ea6
MH		 20#include <asm/smp.h>
21#include <asm/setup.h>
22#include <asm/cpcmd.h>
23#include <asm/cio.h>
03a4d208 24#include <asm/ebcdic.h>
15e9b586 25#include <asm/reset.h>
ab14de6c 26#include <asm/sclp.h>
3bd5f3ef 27#include <asm/sigp.h>
159d1ff8 28#include <asm/checksum.h>
ff6b8ea6
MH		 29
30#define IPL_PARM_BLOCK_VERSION 0
03a4d208 31
411ed322
MH		 32#define IPL_UNKNOWN_STR "unknown"
33#define IPL_CCW_STR "ccw"
34#define IPL_FCP_STR "fcp"
35#define IPL_FCP_DUMP_STR "fcp_dump"
36#define IPL_NSS_STR "nss"
615b04b3 37
99ca4e58
MH		 38#define DUMP_CCW_STR "ccw"
39#define DUMP_FCP_STR "fcp"
40#define DUMP_NONE_STR "none"
41
42/*
43 * Four shutdown trigger types are supported:
44 * - panic
45 * - halt
46 * - power off
47 * - reipl
7dd6b334 48 * - restart
99ca4e58
MH		 49 */
50#define ON_PANIC_STR "on_panic"
51#define ON_HALT_STR "on_halt"
52#define ON_POFF_STR "on_poff"
53#define ON_REIPL_STR "on_reboot"
7dd6b334 54#define ON_RESTART_STR "on_restart"
99ca4e58
MH		 55
56struct shutdown_action;
57struct shutdown_trigger {
58 char *name;
59 struct shutdown_action *action;
60};
61
62/*
099b7651 63 * The following shutdown action types are supported:
99ca4e58
MH		 64 */
65#define SHUTDOWN_ACTION_IPL_STR "ipl"
66#define SHUTDOWN_ACTION_REIPL_STR "reipl"
67#define SHUTDOWN_ACTION_DUMP_STR "dump"
68#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
69#define SHUTDOWN_ACTION_STOP_STR "stop"
099b7651 70#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
99ca4e58
MH		 71
72struct shutdown_action {
73 char *name;
74 void (*fn) (struct shutdown_trigger *trigger);
75 int (*init) (void);
81088819 76 int init_rc;
99ca4e58
MH		 77};
78
ff6b8ea6
MH		 79static char *ipl_type_str(enum ipl_type type)
80{
81 switch (type) {
ff6b8ea6
MH		 82 case IPL_TYPE_CCW:
83 return IPL_CCW_STR;
84 case IPL_TYPE_FCP:
85 return IPL_FCP_STR;
411ed322
MH		 86 case IPL_TYPE_FCP_DUMP:
87 return IPL_FCP_DUMP_STR;
fe355b7f
HY		 88 case IPL_TYPE_NSS:
89 return IPL_NSS_STR;
ff6b8ea6
MH		 90 case IPL_TYPE_UNKNOWN:
91 default:
92 return IPL_UNKNOWN_STR;
93 }
94}
95
411ed322
MH		 96enum dump_type {
97 DUMP_TYPE_NONE = 1,
98 DUMP_TYPE_CCW = 2,
99 DUMP_TYPE_FCP = 4,
100};
101
411ed322
MH		 102static char *dump_type_str(enum dump_type type)
103{
104 switch (type) {
105 case DUMP_TYPE_NONE:
106 return DUMP_NONE_STR;
107 case DUMP_TYPE_CCW:
108 return DUMP_CCW_STR;
109 case DUMP_TYPE_FCP:
110 return DUMP_FCP_STR;
111 default:
112 return NULL;
113 }
114}
115
116/*
117 * Must be in data section since the bss section
118 * is not cleared when these are accessed.
119 */
120static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
121u32 ipl_flags __attribute__((__section__(".data"))) = 0;
122
ff6b8ea6 123enum ipl_method {
411ed322
MH		 124 REIPL_METHOD_CCW_CIO,
125 REIPL_METHOD_CCW_DIAG,
126 REIPL_METHOD_CCW_VM,
127 REIPL_METHOD_FCP_RO_DIAG,
128 REIPL_METHOD_FCP_RW_DIAG,
129 REIPL_METHOD_FCP_RO_VM,
130 REIPL_METHOD_FCP_DUMP,
131 REIPL_METHOD_NSS,
a0443fbb 132 REIPL_METHOD_NSS_DIAG,
411ed322
MH		 133 REIPL_METHOD_DEFAULT,
134};
135
136enum dump_method {
137 DUMP_METHOD_NONE,
138 DUMP_METHOD_CCW_CIO,
139 DUMP_METHOD_CCW_DIAG,
140 DUMP_METHOD_CCW_VM,
141 DUMP_METHOD_FCP_DIAG,
ff6b8ea6
MH		 142};
143
ff6b8ea6
MH		 144static int diag308_set_works = 0;
145
a0443fbb
HB		 146static struct ipl_parameter_block ipl_block;
147
ff6b8ea6 148static int reipl_capabilities = IPL_TYPE_UNKNOWN;
fe355b7f 149
ff6b8ea6 150static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
411ed322 151static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
ff6b8ea6
MH		 152static struct ipl_parameter_block *reipl_block_fcp;
153static struct ipl_parameter_block *reipl_block_ccw;
a0443fbb 154static struct ipl_parameter_block *reipl_block_nss;
099b7651 155static struct ipl_parameter_block *reipl_block_actual;
fe355b7f 156
411ed322
MH		 157static int dump_capabilities = DUMP_TYPE_NONE;
158static enum dump_type dump_type = DUMP_TYPE_NONE;
159static enum dump_method dump_method = DUMP_METHOD_NONE;
ff6b8ea6
MH		 160static struct ipl_parameter_block *dump_block_fcp;
161static struct ipl_parameter_block *dump_block_ccw;
162
05dd2530
HC		 163static struct sclp_ipl_info sclp_ipl_info;
164
46b05d26 165int diag308(unsigned long subcode, void *addr)
ff6b8ea6 166{
94c12cc7 167 register unsigned long _addr asm("0") = (unsigned long) addr;
ff6b8ea6
MH		 168 register unsigned long _rc asm("1") = 0;
169
94c12cc7
MS		 170 asm volatile(
171 " diag %0,%2,0x308\n"
172 "0:\n"
173 EX_TABLE(0b,0b)
ff6b8ea6 174 : "+d" (_addr), "+d" (_rc)
94c12cc7 175 : "d" (subcode) : "cc", "memory");
ff6b8ea6
MH		 176 return _rc;
177}
411ed322 178EXPORT_SYMBOL_GPL(diag308);
ff6b8ea6
MH		 179
180/* SYSFS */
181
182#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
9b949165
GKH		 183static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
184 struct kobj_attribute *attr, \
ff6b8ea6
MH		 185 char *page) \
186{ \
187 return sprintf(page, _format, _value); \
188} \
9b949165 189static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
ff6b8ea6
MH		 190 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
191
192#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
9b949165
GKH		 193static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
194 struct kobj_attribute *attr, \
ff6b8ea6
MH		 195 char *page) \
196{ \
197 return sprintf(page, _fmt_out, \
198 (unsigned long long) _value); \
199} \
9b949165
GKH		 200static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
201 struct kobj_attribute *attr, \
ff6b8ea6
MH		 202 const char *buf, size_t len) \
203{ \
204 unsigned long long value; \
205 if (sscanf(buf, _fmt_in, &value) != 1) \
206 return -EINVAL; \
207 _value = value; \
208 return len; \
209} \
9b949165 210static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
ff6b8ea6
MH		 211 __ATTR(_name,(S_IRUGO | S_IWUSR), \
212 sys_##_prefix##_##_name##_show, \
213 sys_##_prefix##_##_name##_store);
214
fe355b7f 215#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
9b949165
GKH		 216static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
217 struct kobj_attribute *attr, \
fe355b7f
HY		 218 char *page) \
219{ \
220 return sprintf(page, _fmt_out, _value); \
221} \
9b949165
GKH		 222static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
223 struct kobj_attribute *attr, \
fe355b7f
HY		 224 const char *buf, size_t len) \
225{ \
99ca4e58 226 strncpy(_value, buf, sizeof(_value) - 1); \
1d802e24 227 strim(_value); \
fe355b7f
HY		 228 return len; \
229} \
9b949165 230static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
fe355b7f
HY		 231 __ATTR(_name,(S_IRUGO | S_IWUSR), \
232 sys_##_prefix##_##_name##_show, \
233 sys_##_prefix##_##_name##_store);
234
ff6b8ea6
MH		 235static void make_attrs_ro(struct attribute **attrs)
236{
237 while (*attrs) {
238 (*attrs)->mode = S_IRUGO;
239 attrs++;
240 }
241}
242
243/*
244 * ipl section
245 */
246
411ed322 247static __init enum ipl_type get_ipl_type(void)
ff6b8ea6
MH		 248{
249 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
250
fe355b7f
HY		 251 if (ipl_flags & IPL_NSS_VALID)
252 return IPL_TYPE_NSS;
e87bfe51 253 if (!(ipl_flags & IPL_DEVNO_VALID))
ff6b8ea6 254 return IPL_TYPE_UNKNOWN;
e87bfe51 255 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
ff6b8ea6
MH		 256 return IPL_TYPE_CCW;
257 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
258 return IPL_TYPE_UNKNOWN;
259 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
260 return IPL_TYPE_UNKNOWN;
411ed322
MH		 261 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
262 return IPL_TYPE_FCP_DUMP;
ff6b8ea6
MH		 263 return IPL_TYPE_FCP;
264}
265
411ed322
MH		 266struct ipl_info ipl_info;
267EXPORT_SYMBOL_GPL(ipl_info);
268
9b949165
GKH		 269static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
270 char *page)
ff6b8ea6 271{
411ed322 272 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
ff6b8ea6
MH		 273}
274
9b949165 275static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
ff6b8ea6 276
a0443fbb 277/* VM IPL PARM routines */
684d2fd4 278size_t reipl_get_ascii_vmparm(char *dest, size_t size,
a0443fbb
HB		 279 const struct ipl_parameter_block *ipb)
280{
281 int i;
684d2fd4 282 size_t len;
a0443fbb
HB		 283 char has_lowercase = 0;
284
684d2fd4 285 len = 0;
a0443fbb
HB		 286 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
287 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
288
684d2fd4 289 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
a0443fbb
HB		 290 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
291 /* If at least one character is lowercase, we assume mixed
292 * case; otherwise we convert everything to lowercase.
293 */
294 for (i = 0; i < len; i++)
295 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
296 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
297 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
298 has_lowercase = 1;
299 break;
300 }
301 if (!has_lowercase)
302 EBC_TOLOWER(dest, len);
303 EBCASC(dest, len);
304 }
305 dest[len] = 0;
684d2fd4
HB		 306
307 return len;
a0443fbb
HB		 308}
309
684d2fd4 310size_t append_ipl_vmparm(char *dest, size_t size)
a0443fbb 311{
684d2fd4
HB		 312 size_t rc;
313
314 rc = 0;
a0443fbb 315 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
684d2fd4 316 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
a0443fbb
HB		 317 else
318 dest[0] = 0;
684d2fd4 319 return rc;
a0443fbb
HB		 320}
321
322static ssize_t ipl_vm_parm_show(struct kobject *kobj,
323 struct kobj_attribute *attr, char *page)
324{
325 char parm[DIAG308_VMPARM_SIZE + 1] = {};
326
684d2fd4 327 append_ipl_vmparm(parm, sizeof(parm));
a0443fbb
HB		 328 return sprintf(page, "%s\n", parm);
329}
330
684d2fd4
HB		 331static size_t scpdata_length(const char* buf, size_t count)
332{
333 while (count) {
334 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
335 break;
336 count--;
337 }
338 return count;
339}
340
341size_t reipl_append_ascii_scpdata(char *dest, size_t size,
342 const struct ipl_parameter_block *ipb)
343{
344 size_t count;
345 size_t i;
18d00acf 346 int has_lowercase;
684d2fd4
HB		 347
348 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
349 ipb->ipl_info.fcp.scp_data_len));
350 if (!count)
351 goto out;
352
18d00acf
HB		 353 has_lowercase = 0;
354 for (i = 0; i < count; i++) {
684d2fd4
HB		 355 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
356 count = 0;
357 goto out;
358 }
18d00acf
HB		 359 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
360 has_lowercase = 1;
361 }
684d2fd4 362
18d00acf
HB		 363 if (has_lowercase)
364 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
365 else
366 for (i = 0; i < count; i++)
367 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
684d2fd4
HB		 368out:
369 dest[count] = '\0';
370 return count;
371}
372
373size_t append_ipl_scpdata(char *dest, size_t len)
374{
375 size_t rc;
376
377 rc = 0;
378 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
379 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
380 else
381 dest[0] = 0;
382 return rc;
383}
384
385
a0443fbb
HB		 386static struct kobj_attribute sys_ipl_vm_parm_attr =
387 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
388
9b949165
GKH		 389static ssize_t sys_ipl_device_show(struct kobject *kobj,
390 struct kobj_attribute *attr, char *page)
ff6b8ea6
MH		 391{
392 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
393
411ed322 394 switch (ipl_info.type) {
ff6b8ea6
MH		 395 case IPL_TYPE_CCW:
396 return sprintf(page, "0.0.%04x\n", ipl_devno);
397 case IPL_TYPE_FCP:
411ed322 398 case IPL_TYPE_FCP_DUMP:
ff6b8ea6
MH		 399 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
400 default:
401 return 0;
402 }
403}
404
9b949165 405static struct kobj_attribute sys_ipl_device_attr =
ff6b8ea6
MH		 406 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
407
2c3c8bea
CW		 408static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
409 struct bin_attribute *attr, char *buf,
410 loff_t off, size_t count)
ff6b8ea6 411{
0788fea4
AM		 412 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
413 IPL_PARMBLOCK_SIZE);
ff6b8ea6
MH		 414}
415
416static struct bin_attribute ipl_parameter_attr = {
417 .attr = {
418 .name = "binary_parameter",
419 .mode = S_IRUGO,
ff6b8ea6
MH		 420 },
421 .size = PAGE_SIZE,
422 .read = &ipl_parameter_read,
423};
424
2c3c8bea
CW		 425static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
426 struct bin_attribute *attr, char *buf,
427 loff_t off, size_t count)
ff6b8ea6
MH		 428{
429 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
430 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
431
0788fea4 432 return memory_read_from_buffer(buf, count, &off, scp_data, size);
ff6b8ea6
MH		 433}
434
435static struct bin_attribute ipl_scp_data_attr = {
436 .attr = {
437 .name = "scp_data",
438 .mode = S_IRUGO,
ff6b8ea6
MH		 439 },
440 .size = PAGE_SIZE,
05bd711e 441 .read = ipl_scp_data_read,
ff6b8ea6
MH		 442};
443
444/* FCP ipl device attributes */
445
446DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
447 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
448DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
449 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
450DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
451 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
452DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
453 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
454
455static struct attribute *ipl_fcp_attrs[] = {
456 &sys_ipl_type_attr.attr,
457 &sys_ipl_device_attr.attr,
458 &sys_ipl_fcp_wwpn_attr.attr,
459 &sys_ipl_fcp_lun_attr.attr,
460 &sys_ipl_fcp_bootprog_attr.attr,
461 &sys_ipl_fcp_br_lba_attr.attr,
462 NULL,
463};
464
465static struct attribute_group ipl_fcp_attr_group = {
466 .attrs = ipl_fcp_attrs,
467};
468
469/* CCW ipl device attributes */
470
9b949165
GKH		 471static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
472 struct kobj_attribute *attr, char *page)
03a4d208
MH		 473{
474 char loadparm[LOADPARM_LEN + 1] = {};
475
05dd2530 476 if (!sclp_ipl_info.is_valid)
03a4d208 477 return sprintf(page, "#unknown#\n");
05dd2530 478 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
03a4d208 479 EBCASC(loadparm, LOADPARM_LEN);
1d802e24 480 strim(loadparm);
03a4d208
MH		 481 return sprintf(page, "%s\n", loadparm);
482}
483
9b949165 484static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
03a4d208
MH		 485 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
486
a0443fbb
HB		 487static struct attribute *ipl_ccw_attrs_vm[] = {
488 &sys_ipl_type_attr.attr,
489 &sys_ipl_device_attr.attr,
490 &sys_ipl_ccw_loadparm_attr.attr,
491 &sys_ipl_vm_parm_attr.attr,
492 NULL,
493};
494
495static struct attribute *ipl_ccw_attrs_lpar[] = {
ff6b8ea6
MH		 496 &sys_ipl_type_attr.attr,
497 &sys_ipl_device_attr.attr,
03a4d208 498 &sys_ipl_ccw_loadparm_attr.attr,
ff6b8ea6
MH		 499 NULL,
500};
501
a0443fbb
HB		 502static struct attribute_group ipl_ccw_attr_group_vm = {
503 .attrs = ipl_ccw_attrs_vm,
504};
505
506static struct attribute_group ipl_ccw_attr_group_lpar = {
507 .attrs = ipl_ccw_attrs_lpar
ff6b8ea6
MH		 508};
509
fe355b7f
HY		 510/* NSS ipl device attributes */
511
512DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
513
514static struct attribute *ipl_nss_attrs[] = {
515 &sys_ipl_type_attr.attr,
516 &sys_ipl_nss_name_attr.attr,
a0443fbb
HB		 517 &sys_ipl_ccw_loadparm_attr.attr,
518 &sys_ipl_vm_parm_attr.attr,
fe355b7f
HY		 519 NULL,
520};
521
522static struct attribute_group ipl_nss_attr_group = {
523 .attrs = ipl_nss_attrs,
524};
525
ff6b8ea6
MH		 526/* UNKNOWN ipl device attributes */
527
528static struct attribute *ipl_unknown_attrs[] = {
529 &sys_ipl_type_attr.attr,
530 NULL,
531};
532
533static struct attribute_group ipl_unknown_attr_group = {
534 .attrs = ipl_unknown_attrs,
535};
536
d91885be 537static struct kset *ipl_kset;
ff6b8ea6 538
99ca4e58
MH		 539static int __init ipl_register_fcp_files(void)
540{
541 int rc;
542
543 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
544 if (rc)
545 goto out;
546 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
547 if (rc)
548 goto out_ipl_parm;
549 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
550 if (!rc)
551 goto out;
552
553 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
554
555out_ipl_parm:
556 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
557out:
558 return rc;
559}
560
2c2df118 561static void __ipl_run(void *unused)
99ca4e58
MH		 562{
563 diag308(DIAG308_IPL, NULL);
564 if (MACHINE_IS_VM)
565 __cpcmd("IPL", NULL, 0, NULL);
566 else if (ipl_info.type == IPL_TYPE_CCW)
567 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
568}
569
2c2df118
HC		 570static void ipl_run(struct shutdown_trigger *trigger)
571{
572 smp_switch_to_ipl_cpu(__ipl_run, NULL);
573}
574
2bc89b5e 575static int __init ipl_init(void)
99ca4e58
MH		 576{
577 int rc;
578
579 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
580 if (!ipl_kset) {
581 rc = -ENOMEM;
582 goto out;
583 }
584 switch (ipl_info.type) {
585 case IPL_TYPE_CCW:
a0443fbb
HB		 586 if (MACHINE_IS_VM)
587 rc = sysfs_create_group(&ipl_kset->kobj,
588 &ipl_ccw_attr_group_vm);
589 else
590 rc = sysfs_create_group(&ipl_kset->kobj,
591 &ipl_ccw_attr_group_lpar);
99ca4e58
MH		 592 break;
593 case IPL_TYPE_FCP:
594 case IPL_TYPE_FCP_DUMP:
595 rc = ipl_register_fcp_files();
596 break;
597 case IPL_TYPE_NSS:
598 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
599 break;
600 default:
601 rc = sysfs_create_group(&ipl_kset->kobj,
602 &ipl_unknown_attr_group);
603 break;
604 }
605out:
606 if (rc)
607 panic("ipl_init failed: rc = %i\n", rc);
608
609 return 0;
610}
611
2bc89b5e
HC		 612static struct shutdown_action __refdata ipl_action = {
613 .name = SHUTDOWN_ACTION_IPL_STR,
614 .fn = ipl_run,
615 .init = ipl_init,
616};
99ca4e58 617
ff6b8ea6 618/*
99ca4e58 619 * reipl shutdown action: Reboot Linux on shutdown.
ff6b8ea6
MH		 620 */
621
a0443fbb
HB		 622/* VM IPL PARM attributes */
623static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
624 char *page)
625{
626 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
627
684d2fd4 628 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
a0443fbb
HB		 629 return sprintf(page, "%s\n", vmparm);
630}
631
632static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
633 size_t vmparm_max,
634 const char *buf, size_t len)
635{
636 int i, ip_len;
637
638 /* ignore trailing newline */
639 ip_len = len;
640 if ((len > 0) && (buf[len - 1] == '\n'))
641 ip_len--;
642
643 if (ip_len > vmparm_max)
644 return -EINVAL;
645
646 /* parm is used to store kernel options, check for common chars */
647 for (i = 0; i < ip_len; i++)
648 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
649 return -EINVAL;
650
651 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
652 ipb->ipl_info.ccw.vm_parm_len = ip_len;
653 if (ip_len > 0) {
654 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
655 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
656 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
657 } else {
658 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
659 }
660
661 return len;
662}
663
664/* NSS wrapper */
665static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
666 struct kobj_attribute *attr, char *page)
667{
668 return reipl_generic_vmparm_show(reipl_block_nss, page);
669}
670
671static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
672 struct kobj_attribute *attr,
673 const char *buf, size_t len)
674{
675 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
676}
677
678/* CCW wrapper */
679static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
680 struct kobj_attribute *attr, char *page)
681{
682 return reipl_generic_vmparm_show(reipl_block_ccw, page);
683}
684
685static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
686 struct kobj_attribute *attr,
687 const char *buf, size_t len)
688{
689 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
690}
691
692static struct kobj_attribute sys_reipl_nss_vmparm_attr =
693 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
694 reipl_nss_vmparm_store);
695static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
696 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
697 reipl_ccw_vmparm_store);
698
ff6b8ea6
MH		 699/* FCP reipl device attributes */
700
2c3c8bea 701static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
684d2fd4
HB		 702 struct bin_attribute *attr,
703 char *buf, loff_t off, size_t count)
704{
705 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
706 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
707
708 return memory_read_from_buffer(buf, count, &off, scp_data, size);
709}
710
2c3c8bea 711static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
684d2fd4
HB		 712 struct bin_attribute *attr,
713 char *buf, loff_t off, size_t count)
714{
715 size_t padding;
716 size_t scpdata_len;
717
718 if (off < 0)
719 return -EINVAL;
720
721 if (off >= DIAG308_SCPDATA_SIZE)
722 return -ENOSPC;
723
724 if (count > DIAG308_SCPDATA_SIZE - off)
725 count = DIAG308_SCPDATA_SIZE - off;
726
727 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
728 scpdata_len = off + count;
729
730 if (scpdata_len % 8) {
731 padding = 8 - (scpdata_len % 8);
732 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
733 0, padding);
734 scpdata_len += padding;
735 }
736
737 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
738 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
739 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
740
741 return count;
742}
743
744static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
745 .attr = {
746 .name = "scp_data",
747 .mode = S_IRUGO | S_IWUSR,
748 },
749 .size = PAGE_SIZE,
750 .read = reipl_fcp_scpdata_read,
751 .write = reipl_fcp_scpdata_write,
752};
753
ff6b8ea6
MH		 754DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
755 reipl_block_fcp->ipl_info.fcp.wwpn);
756DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
757 reipl_block_fcp->ipl_info.fcp.lun);
758DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
759 reipl_block_fcp->ipl_info.fcp.bootprog);
760DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
761 reipl_block_fcp->ipl_info.fcp.br_lba);
762DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
763 reipl_block_fcp->ipl_info.fcp.devno);
764
765static struct attribute *reipl_fcp_attrs[] = {
766 &sys_reipl_fcp_device_attr.attr,
767 &sys_reipl_fcp_wwpn_attr.attr,
768 &sys_reipl_fcp_lun_attr.attr,
769 &sys_reipl_fcp_bootprog_attr.attr,
770 &sys_reipl_fcp_br_lba_attr.attr,
771 NULL,
772};
773
774static struct attribute_group reipl_fcp_attr_group = {
ff6b8ea6
MH		 775 .attrs = reipl_fcp_attrs,
776};
777
778/* CCW reipl device attributes */
779
780DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
781 reipl_block_ccw->ipl_info.ccw.devno);
782
a0443fbb
HB		 783static void reipl_get_ascii_loadparm(char *loadparm,
784 struct ipl_parameter_block *ibp)
03a4d208 785{
a0443fbb 786 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
03a4d208
MH		 787 EBCASC(loadparm, LOADPARM_LEN);
788 loadparm[LOADPARM_LEN] = 0;
1d802e24 789 strim(loadparm);
03a4d208
MH		 790}
791
a0443fbb
HB		 792static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
793 char *page)
03a4d208
MH		 794{
795 char buf[LOADPARM_LEN + 1];
796
a0443fbb 797 reipl_get_ascii_loadparm(buf, ipb);
03a4d208
MH		 798 return sprintf(page, "%s\n", buf);
799}
800
a0443fbb
HB		 801static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
802 const char *buf, size_t len)
03a4d208
MH		 803{
804 int i, lp_len;
805
806 /* ignore trailing newline */
807 lp_len = len;
808 if ((len > 0) && (buf[len - 1] == '\n'))
809 lp_len--;
810 /* loadparm can have max 8 characters and must not start with a blank */
811 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
812 return -EINVAL;
813 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
814 for (i = 0; i < lp_len; i++) {
815 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
816 (buf[i] == '.'))
817 continue;
818 return -EINVAL;
819 }
820 /* initialize loadparm with blanks */
a0443fbb 821 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
03a4d208 822 /* copy and convert to ebcdic */
a0443fbb
HB		 823 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
824 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
03a4d208
MH		 825 return len;
826}
827
a0443fbb
HB		 828/* NSS wrapper */
829static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
830 struct kobj_attribute *attr, char *page)
831{
832 return reipl_generic_loadparm_show(reipl_block_nss, page);
833}
834
835static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
836 struct kobj_attribute *attr,
837 const char *buf, size_t len)
838{
839 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
840}
841
842/* CCW wrapper */
843static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
844 struct kobj_attribute *attr, char *page)
845{
846 return reipl_generic_loadparm_show(reipl_block_ccw, page);
847}
848
849static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
850 struct kobj_attribute *attr,
851 const char *buf, size_t len)
852{
853 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
854}
855
9b949165 856static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
a0443fbb
HB		 857 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
858 reipl_ccw_loadparm_store);
859
860static struct attribute *reipl_ccw_attrs_vm[] = {
861 &sys_reipl_ccw_device_attr.attr,
862 &sys_reipl_ccw_loadparm_attr.attr,
863 &sys_reipl_ccw_vmparm_attr.attr,
864 NULL,
865};
03a4d208 866
a0443fbb 867static struct attribute *reipl_ccw_attrs_lpar[] = {
ff6b8ea6 868 &sys_reipl_ccw_device_attr.attr,
03a4d208 869 &sys_reipl_ccw_loadparm_attr.attr,
ff6b8ea6
MH		 870 NULL,
871};
872
a0443fbb 873static struct attribute_group reipl_ccw_attr_group_vm = {
ff6b8ea6 874 .name = IPL_CCW_STR,
a0443fbb
HB		 875 .attrs = reipl_ccw_attrs_vm,
876};
877
878static struct attribute_group reipl_ccw_attr_group_lpar = {
879 .name = IPL_CCW_STR,
880 .attrs = reipl_ccw_attrs_lpar,
ff6b8ea6
MH		 881};
882
fe355b7f
HY		 883
884/* NSS reipl device attributes */
a0443fbb
HB		 885static void reipl_get_ascii_nss_name(char *dst,
886 struct ipl_parameter_block *ipb)
887{
888 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
889 EBCASC(dst, NSS_NAME_SIZE);
890 dst[NSS_NAME_SIZE] = 0;
891}
892
893static ssize_t reipl_nss_name_show(struct kobject *kobj,
894 struct kobj_attribute *attr, char *page)
895{
896 char nss_name[NSS_NAME_SIZE + 1] = {};
897
898 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
899 return sprintf(page, "%s\n", nss_name);
900}
901
902static ssize_t reipl_nss_name_store(struct kobject *kobj,
903 struct kobj_attribute *attr,
904 const char *buf, size_t len)
905{
906 int nss_len;
907
908 /* ignore trailing newline */
909 nss_len = len;
910 if ((len > 0) && (buf[len - 1] == '\n'))
911 nss_len--;
fe355b7f 912
a0443fbb
HB		 913 if (nss_len > NSS_NAME_SIZE)
914 return -EINVAL;
915
916 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
917 if (nss_len > 0) {
918 reipl_block_nss->ipl_info.ccw.vm_flags |=
919 DIAG308_VM_FLAGS_NSS_VALID;
920 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
921 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
922 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
923 } else {
924 reipl_block_nss->ipl_info.ccw.vm_flags &=
925 ~DIAG308_VM_FLAGS_NSS_VALID;
926 }
927
928 return len;
929}
930
931static struct kobj_attribute sys_reipl_nss_name_attr =
932 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
933 reipl_nss_name_store);
934
935static struct kobj_attribute sys_reipl_nss_loadparm_attr =
936 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
937 reipl_nss_loadparm_store);
fe355b7f
HY		 938
939static struct attribute *reipl_nss_attrs[] = {
940 &sys_reipl_nss_name_attr.attr,
a0443fbb
HB		 941 &sys_reipl_nss_loadparm_attr.attr,
942 &sys_reipl_nss_vmparm_attr.attr,
fe355b7f
HY		 943 NULL,
944};
945
946static struct attribute_group reipl_nss_attr_group = {
947 .name = IPL_NSS_STR,
948 .attrs = reipl_nss_attrs,
949};
950
ff6b8ea6
MH		 951/* reipl type */
952
953static int reipl_set_type(enum ipl_type type)
954{
955 if (!(reipl_capabilities & type))
956 return -EINVAL;
957
958 switch(type) {
959 case IPL_TYPE_CCW:
48657d22
MH		 960 if (diag308_set_works)
961 reipl_method = REIPL_METHOD_CCW_DIAG;
962 else if (MACHINE_IS_VM)
411ed322 963 reipl_method = REIPL_METHOD_CCW_VM;
ff6b8ea6 964 else
411ed322 965 reipl_method = REIPL_METHOD_CCW_CIO;
099b7651 966 reipl_block_actual = reipl_block_ccw;
ff6b8ea6
MH		 967 break;
968 case IPL_TYPE_FCP:
969 if (diag308_set_works)
411ed322 970 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
ff6b8ea6 971 else if (MACHINE_IS_VM)
411ed322 972 reipl_method = REIPL_METHOD_FCP_RO_VM;
ff6b8ea6 973 else
411ed322 974 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
099b7651 975 reipl_block_actual = reipl_block_fcp;
411ed322
MH		 976 break;
977 case IPL_TYPE_FCP_DUMP:
978 reipl_method = REIPL_METHOD_FCP_DUMP;
ff6b8ea6 979 break;
fe355b7f 980 case IPL_TYPE_NSS:
a0443fbb
HB		 981 if (diag308_set_works)
982 reipl_method = REIPL_METHOD_NSS_DIAG;
983 else
984 reipl_method = REIPL_METHOD_NSS;
099b7651 985 reipl_block_actual = reipl_block_nss;
411ed322
MH		 986 break;
987 case IPL_TYPE_UNKNOWN:
988 reipl_method = REIPL_METHOD_DEFAULT;
fe355b7f 989 break;
ff6b8ea6 990 default:
411ed322 991 BUG();
ff6b8ea6
MH		 992 }
993 reipl_type = type;
994 return 0;
995}
996
9b949165
GKH		 997static ssize_t reipl_type_show(struct kobject *kobj,
998 struct kobj_attribute *attr, char *page)
ff6b8ea6
MH		 999{
1000 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1001}
1002
9b949165
GKH		 1003static ssize_t reipl_type_store(struct kobject *kobj,
1004 struct kobj_attribute *attr,
1005 const char *buf, size_t len)
ff6b8ea6
MH		 1006{
1007 int rc = -EINVAL;
1008
1009 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1010 rc = reipl_set_type(IPL_TYPE_CCW);
1011 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1012 rc = reipl_set_type(IPL_TYPE_FCP);
fe355b7f
HY		 1013 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1014 rc = reipl_set_type(IPL_TYPE_NSS);
ff6b8ea6
MH		 1015 return (rc != 0) ? rc : len;
1016}
1017
9b949165 1018static struct kobj_attribute reipl_type_attr =
99ca4e58 1019 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
ff6b8ea6 1020
d91885be 1021static struct kset *reipl_kset;
684d2fd4 1022static struct kset *reipl_fcp_kset;
ff6b8ea6 1023
a0443fbb
HB		 1024static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1025 const enum ipl_method m)
1026{
1027 char loadparm[LOADPARM_LEN + 1] = {};
1028 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1029 char nss_name[NSS_NAME_SIZE + 1] = {};
1030 size_t pos = 0;
1031
1032 reipl_get_ascii_loadparm(loadparm, ipb);
1033 reipl_get_ascii_nss_name(nss_name, ipb);
684d2fd4 1034 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
a0443fbb
HB		 1035
1036 switch (m) {
1037 case REIPL_METHOD_CCW_VM:
1038 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1039 break;
1040 case REIPL_METHOD_NSS:
1041 pos = sprintf(dst, "IPL %s", nss_name);
1042 break;
1043 default:
1044 break;
1045 }
1046 if (strlen(loadparm) > 0)
1047 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1048 if (strlen(vmparm) > 0)
1049 sprintf(dst + pos, " PARM %s", vmparm);
1050}
1051
2c2df118 1052static void __reipl_run(void *unused)
ff6b8ea6
MH		 1053{
1054 struct ccw_dev_id devid;
a0443fbb 1055 static char buf[128];
ff6b8ea6 1056
ff6b8ea6 1057 switch (reipl_method) {
411ed322 1058 case REIPL_METHOD_CCW_CIO:
ff6b8ea6
MH		 1059 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1060 devid.ssid = 0;
1061 reipl_ccw_dev(&devid);
1062 break;
411ed322 1063 case REIPL_METHOD_CCW_VM:
a0443fbb 1064 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
740b5706 1065 __cpcmd(buf, NULL, 0, NULL);
ff6b8ea6 1066 break;
411ed322 1067 case REIPL_METHOD_CCW_DIAG:
ff6b8ea6
MH		 1068 diag308(DIAG308_SET, reipl_block_ccw);
1069 diag308(DIAG308_IPL, NULL);
1070 break;
411ed322 1071 case REIPL_METHOD_FCP_RW_DIAG:
ff6b8ea6
MH		 1072 diag308(DIAG308_SET, reipl_block_fcp);
1073 diag308(DIAG308_IPL, NULL);
1074 break;
411ed322 1075 case REIPL_METHOD_FCP_RO_DIAG:
ff6b8ea6
MH		 1076 diag308(DIAG308_IPL, NULL);
1077 break;
411ed322 1078 case REIPL_METHOD_FCP_RO_VM:
740b5706 1079 __cpcmd("IPL", NULL, 0, NULL);
ff6b8ea6 1080 break;
a0443fbb
HB		 1081 case REIPL_METHOD_NSS_DIAG:
1082 diag308(DIAG308_SET, reipl_block_nss);
1083 diag308(DIAG308_IPL, NULL);
1084 break;
411ed322 1085 case REIPL_METHOD_NSS:
a0443fbb 1086 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
fe355b7f
HY		 1087 __cpcmd(buf, NULL, 0, NULL);
1088 break;
411ed322 1089 case REIPL_METHOD_DEFAULT:
ff6b8ea6 1090 if (MACHINE_IS_VM)
740b5706 1091 __cpcmd("IPL", NULL, 0, NULL);
ff6b8ea6
MH		 1092 diag308(DIAG308_IPL, NULL);
1093 break;
411ed322 1094 case REIPL_METHOD_FCP_DUMP:
411ed322 1095 break;
ff6b8ea6 1096 }
208e5591 1097 disabled_wait((unsigned long) __builtin_return_address(0));
ff6b8ea6
MH		 1098}
1099
2c2df118
HC		 1100static void reipl_run(struct shutdown_trigger *trigger)
1101{
1102 smp_switch_to_ipl_cpu(__reipl_run, NULL);
1103}
1104
a0443fbb 1105static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
ff6b8ea6 1106{
a0443fbb
HB		 1107 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1108 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1109 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1110 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1111}
ff6b8ea6 1112
a0443fbb
HB		 1113static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1114{
1115 /* LOADPARM */
1116 /* check if read scp info worked and set loadparm */
1117 if (sclp_ipl_info.is_valid)
1118 memcpy(ipb->ipl_info.ccw.load_parm,
1119 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1120 else
1121 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1122 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1123 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1124
1125 /* VM PARM */
1126 if (MACHINE_IS_VM && diag308_set_works &&
1127 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1128
1129 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1130 ipb->ipl_info.ccw.vm_parm_len =
1131 ipl_block.ipl_info.ccw.vm_parm_len;
1132 memcpy(ipb->ipl_info.ccw.vm_parm,
1133 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1134 }
ff6b8ea6
MH		 1135}
1136
99ca4e58 1137static int __init reipl_nss_init(void)
ff6b8ea6
MH		 1138{
1139 int rc;
1140
99ca4e58
MH		 1141 if (!MACHINE_IS_VM)
1142 return 0;
a0443fbb
HB		 1143
1144 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1145 if (!reipl_block_nss)
1146 return -ENOMEM;
1147
1148 if (!diag308_set_works)
1149 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1150
99ca4e58 1151 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
fe355b7f
HY		 1152 if (rc)
1153 return rc;
a0443fbb
HB		 1154
1155 reipl_block_ccw_init(reipl_block_nss);
1156 if (ipl_info.type == IPL_TYPE_NSS) {
1157 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1158 ' ', NSS_NAME_SIZE);
1159 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1160 kernel_nss_name, strlen(kernel_nss_name));
1161 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1162 reipl_block_nss->ipl_info.ccw.vm_flags |=
1163 DIAG308_VM_FLAGS_NSS_VALID;
1164
1165 reipl_block_ccw_fill_parms(reipl_block_nss);
1166 }
1167
fe355b7f
HY		 1168 reipl_capabilities |= IPL_TYPE_NSS;
1169 return 0;
1170}
1171
ff6b8ea6
MH		 1172static int __init reipl_ccw_init(void)
1173{
1174 int rc;
1175
1176 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1177 if (!reipl_block_ccw)
1178 return -ENOMEM;
a0443fbb
HB		 1179
1180 if (MACHINE_IS_VM) {
1181 if (!diag308_set_works)
1182 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1183 rc = sysfs_create_group(&reipl_kset->kobj,
1184 &reipl_ccw_attr_group_vm);
1185 } else {
1186 if(!diag308_set_works)
1187 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1188 rc = sysfs_create_group(&reipl_kset->kobj,
1189 &reipl_ccw_attr_group_lpar);
ff6b8ea6 1190 }
a0443fbb
HB		 1191 if (rc)
1192 return rc;
1193
1194 reipl_block_ccw_init(reipl_block_ccw);
1195 if (ipl_info.type == IPL_TYPE_CCW) {
ff6b8ea6 1196 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
a0443fbb
HB		 1197 reipl_block_ccw_fill_parms(reipl_block_ccw);
1198 }
1199
ff6b8ea6
MH		 1200 reipl_capabilities |= IPL_TYPE_CCW;
1201 return 0;
1202}
1203
1204static int __init reipl_fcp_init(void)
1205{
1206 int rc;
1207
008d2d11 1208 if (!diag308_set_works) {
684d2fd4 1209 if (ipl_info.type == IPL_TYPE_FCP) {
008d2d11 1210 make_attrs_ro(reipl_fcp_attrs);
684d2fd4
HB		 1211 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1212 } else
008d2d11
MH		 1213 return 0;
1214 }
ff6b8ea6
MH		 1215
1216 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1217 if (!reipl_block_fcp)
1218 return -ENOMEM;
684d2fd4
HB		 1219
1220 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1221 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1222 &reipl_kset->kobj);
798620fb 1223 if (!reipl_fcp_kset) {
684d2fd4
HB		 1224 free_page((unsigned long) reipl_block_fcp);
1225 return -ENOMEM;
1226 }
1227
1228 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
ff6b8ea6 1229 if (rc) {
684d2fd4
HB		 1230 kset_unregister(reipl_fcp_kset);
1231 free_page((unsigned long) reipl_block_fcp);
ff6b8ea6
MH		 1232 return rc;
1233 }
684d2fd4
HB		 1234
1235 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1236 &sys_reipl_fcp_scp_data_attr);
1237 if (rc) {
1238 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1239 kset_unregister(reipl_fcp_kset);
1240 free_page((unsigned long) reipl_block_fcp);
1241 return rc;
1242 }
1243
1244 if (ipl_info.type == IPL_TYPE_FCP)
ff6b8ea6 1245 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
684d2fd4 1246 else {
ff6b8ea6
MH		 1247 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1248 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1249 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
ff6b8ea6
MH		 1250 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1251 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1252 }
1253 reipl_capabilities |= IPL_TYPE_FCP;
1254 return 0;
1255}
1256
2bc89b5e 1257static int __init reipl_init(void)
ff6b8ea6
MH		 1258{
1259 int rc;
1260
f62ed9e3 1261 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
d91885be
GKH		 1262 if (!reipl_kset)
1263 return -ENOMEM;
1264 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
ff6b8ea6 1265 if (rc) {
d91885be 1266 kset_unregister(reipl_kset);
ff6b8ea6
MH		 1267 return rc;
1268 }
1269 rc = reipl_ccw_init();
1270 if (rc)
1271 return rc;
1272 rc = reipl_fcp_init();
fe355b7f
HY		 1273 if (rc)
1274 return rc;
1275 rc = reipl_nss_init();
ff6b8ea6
MH		 1276 if (rc)
1277 return rc;
411ed322 1278 rc = reipl_set_type(ipl_info.type);
ff6b8ea6
MH		 1279 if (rc)
1280 return rc;
1281 return 0;
1282}
1283
2bc89b5e
HC		 1284static struct shutdown_action __refdata reipl_action = {
1285 .name = SHUTDOWN_ACTION_REIPL_STR,
1286 .fn = reipl_run,
1287 .init = reipl_init,
1288};
99ca4e58
MH		 1289
1290/*
1291 * dump shutdown action: Dump Linux on shutdown.
1292 */
1293
1294/* FCP dump device attributes */
1295
1296DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1297 dump_block_fcp->ipl_info.fcp.wwpn);
1298DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1299 dump_block_fcp->ipl_info.fcp.lun);
1300DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1301 dump_block_fcp->ipl_info.fcp.bootprog);
1302DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1303 dump_block_fcp->ipl_info.fcp.br_lba);
1304DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1305 dump_block_fcp->ipl_info.fcp.devno);
1306
1307static struct attribute *dump_fcp_attrs[] = {
1308 &sys_dump_fcp_device_attr.attr,
1309 &sys_dump_fcp_wwpn_attr.attr,
1310 &sys_dump_fcp_lun_attr.attr,
1311 &sys_dump_fcp_bootprog_attr.attr,
1312 &sys_dump_fcp_br_lba_attr.attr,
1313 NULL,
1314};
1315
1316static struct attribute_group dump_fcp_attr_group = {
1317 .name = IPL_FCP_STR,
1318 .attrs = dump_fcp_attrs,
1319};
1320
1321/* CCW dump device attributes */
1322
1323DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1324 dump_block_ccw->ipl_info.ccw.devno);
1325
1326static struct attribute *dump_ccw_attrs[] = {
1327 &sys_dump_ccw_device_attr.attr,
1328 NULL,
1329};
1330
1331static struct attribute_group dump_ccw_attr_group = {
1332 .name = IPL_CCW_STR,
1333 .attrs = dump_ccw_attrs,
1334};
1335
1336/* dump type */
1337
1338static int dump_set_type(enum dump_type type)
1339{
1340 if (!(dump_capabilities & type))
1341 return -EINVAL;
1342 switch (type) {
1343 case DUMP_TYPE_CCW:
48657d22
MH		 1344 if (diag308_set_works)
1345 dump_method = DUMP_METHOD_CCW_DIAG;
1346 else if (MACHINE_IS_VM)
99ca4e58
MH		 1347 dump_method = DUMP_METHOD_CCW_VM;
1348 else
1349 dump_method = DUMP_METHOD_CCW_CIO;
1350 break;
1351 case DUMP_TYPE_FCP:
1352 dump_method = DUMP_METHOD_FCP_DIAG;
1353 break;
1354 default:
1355 dump_method = DUMP_METHOD_NONE;
1356 }
1357 dump_type = type;
1358 return 0;
1359}
1360
1361static ssize_t dump_type_show(struct kobject *kobj,
1362 struct kobj_attribute *attr, char *page)
1363{
1364 return sprintf(page, "%s\n", dump_type_str(dump_type));
1365}
1366
1367static ssize_t dump_type_store(struct kobject *kobj,
1368 struct kobj_attribute *attr,
1369 const char *buf, size_t len)
1370{
1371 int rc = -EINVAL;
1372
1373 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1374 rc = dump_set_type(DUMP_TYPE_NONE);
1375 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1376 rc = dump_set_type(DUMP_TYPE_CCW);
1377 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1378 rc = dump_set_type(DUMP_TYPE_FCP);
1379 return (rc != 0) ? rc : len;
1380}
1381
1382static struct kobj_attribute dump_type_attr =
1383 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1384
1385static struct kset *dump_kset;
1386
2c2df118 1387static void __dump_run(void *unused)
99ca4e58
MH		 1388{
1389 struct ccw_dev_id devid;
1390 static char buf[100];
1391
1392 switch (dump_method) {
1393 case DUMP_METHOD_CCW_CIO:
99ca4e58
MH		 1394 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1395 devid.ssid = 0;
1396 reipl_ccw_dev(&devid);
1397 break;
1398 case DUMP_METHOD_CCW_VM:
99ca4e58
MH		 1399 sprintf(buf, "STORE STATUS");
1400 __cpcmd(buf, NULL, 0, NULL);
1401 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1402 __cpcmd(buf, NULL, 0, NULL);
1403 break;
1404 case DUMP_METHOD_CCW_DIAG:
1405 diag308(DIAG308_SET, dump_block_ccw);
1406 diag308(DIAG308_DUMP, NULL);
1407 break;
1408 case DUMP_METHOD_FCP_DIAG:
1409 diag308(DIAG308_SET, dump_block_fcp);
1410 diag308(DIAG308_DUMP, NULL);
1411 break;
2c2df118
HC		 1412 default:
1413 break;
99ca4e58 1414 }
2c2df118
HC		 1415}
1416
1417static void dump_run(struct shutdown_trigger *trigger)
1418{
1419 if (dump_method == DUMP_METHOD_NONE)
1420 return;
1421 smp_send_stop();
1422 smp_switch_to_ipl_cpu(__dump_run, NULL);
99ca4e58
MH		 1423}
1424
ff6b8ea6
MH		 1425static int __init dump_ccw_init(void)
1426{
1427 int rc;
1428
1429 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1430 if (!dump_block_ccw)
1431 return -ENOMEM;
d91885be 1432 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
ff6b8ea6
MH		 1433 if (rc) {
1434 free_page((unsigned long)dump_block_ccw);
1435 return rc;
1436 }
1437 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1438 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1439 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
ff6b8ea6 1440 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
411ed322 1441 dump_capabilities |= DUMP_TYPE_CCW;
ff6b8ea6
MH		 1442 return 0;
1443}
1444
ff6b8ea6
MH		 1445static int __init dump_fcp_init(void)
1446{
1447 int rc;
1448
05dd2530 1449 if (!sclp_ipl_info.has_dump)
ff6b8ea6
MH		 1450 return 0; /* LDIPL DUMP is not installed */
1451 if (!diag308_set_works)
1452 return 0;
1453 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1454 if (!dump_block_fcp)
1455 return -ENOMEM;
d91885be 1456 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
ff6b8ea6
MH		 1457 if (rc) {
1458 free_page((unsigned long)dump_block_fcp);
1459 return rc;
1460 }
1461 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1462 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1463 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
ff6b8ea6
MH		 1464 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1465 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
411ed322 1466 dump_capabilities |= DUMP_TYPE_FCP;
ff6b8ea6
MH		 1467 return 0;
1468}
1469
2bc89b5e 1470static int __init dump_init(void)
ff6b8ea6
MH		 1471{
1472 int rc;
1473
f62ed9e3 1474 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
d91885be
GKH		 1475 if (!dump_kset)
1476 return -ENOMEM;
99ca4e58 1477 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
ff6b8ea6 1478 if (rc) {
d91885be 1479 kset_unregister(dump_kset);
ff6b8ea6
MH		 1480 return rc;
1481 }
1482 rc = dump_ccw_init();
1483 if (rc)
1484 return rc;
1485 rc = dump_fcp_init();
1486 if (rc)
1487 return rc;
411ed322 1488 dump_set_type(DUMP_TYPE_NONE);
ff6b8ea6
MH		 1489 return 0;
1490}
1491
2bc89b5e
HC		 1492static struct shutdown_action __refdata dump_action = {
1493 .name = SHUTDOWN_ACTION_DUMP_STR,
1494 .fn = dump_run,
1495 .init = dump_init,
1496};
99ca4e58 1497
099b7651
FM		 1498static void dump_reipl_run(struct shutdown_trigger *trigger)
1499{
1500 preempt_disable();
1501 /*
1502 * Bypass dynamic address translation (DAT) when storing IPL parameter
1503 * information block address and checksum into the prefix area
1504 * (corresponding to absolute addresses 0-8191).
1505 * When enhanced DAT applies and the STE format control in one,
1506 * the absolute address is formed without prefixing. In this case a
1507 * normal store (stg/st) into the prefix area would no more match to
1508 * absolute addresses 0-8191.
1509 */
1510#ifdef CONFIG_64BIT
1511 asm volatile("sturg %0,%1"
1512 :: "a" ((unsigned long) reipl_block_actual),
1513 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1514#else
1515 asm volatile("stura %0,%1"
1516 :: "a" ((unsigned long) reipl_block_actual),
1517 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1518#endif
1519 asm volatile("stura %0,%1"
159d1ff8
FM		 1520 :: "a" (csum_partial(reipl_block_actual,
1521 reipl_block_actual->hdr.len, 0)),
099b7651
FM		 1522 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1523 preempt_enable();
1524 dump_run(trigger);
1525}
1526
1527static int __init dump_reipl_init(void)
1528{
1529 if (!diag308_set_works)
1530 return -EOPNOTSUPP;
1531 else
1532 return 0;
1533}
1534
1535static struct shutdown_action __refdata dump_reipl_action = {
1536 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1537 .fn = dump_reipl_run,
1538 .init = dump_reipl_init,
1539};
1540
99ca4e58
MH		 1541/*
1542 * vmcmd shutdown action: Trigger vm command on shutdown.
1543 */
1544
1545static char vmcmd_on_reboot[128];
1546static char vmcmd_on_panic[128];
1547static char vmcmd_on_halt[128];
1548static char vmcmd_on_poff[128];
7dd6b334 1549static char vmcmd_on_restart[128];
99ca4e58
MH		 1550
1551DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1552DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1553DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1554DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
7dd6b334 1555DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
99ca4e58
MH		 1556
1557static struct attribute *vmcmd_attrs[] = {
1558 &sys_vmcmd_on_reboot_attr.attr,
1559 &sys_vmcmd_on_panic_attr.attr,
1560 &sys_vmcmd_on_halt_attr.attr,
1561 &sys_vmcmd_on_poff_attr.attr,
7dd6b334 1562 &sys_vmcmd_on_restart_attr.attr,
99ca4e58
MH		 1563 NULL,
1564};
1565
1566static struct attribute_group vmcmd_attr_group = {
1567 .attrs = vmcmd_attrs,
1568};
1569
1570static struct kset *vmcmd_kset;
1571
1572static void vmcmd_run(struct shutdown_trigger *trigger)
ff6b8ea6 1573{
99ca4e58
MH		 1574 char *cmd, *next_cmd;
1575
1576 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1577 cmd = vmcmd_on_reboot;
1578 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1579 cmd = vmcmd_on_panic;
1580 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1581 cmd = vmcmd_on_halt;
1582 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1583 cmd = vmcmd_on_poff;
7dd6b334
MH		 1584 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1585 cmd = vmcmd_on_restart;
99ca4e58
MH		 1586 else
1587 return;
1588
1589 if (strlen(cmd) == 0)
1590 return;
1591 do {
1592 next_cmd = strchr(cmd, '\n');
1593 if (next_cmd) {
1594 next_cmd[0] = 0;
1595 next_cmd += 1;
1596 }
1597 __cpcmd(cmd, NULL, 0, NULL);
1598 cmd = next_cmd;
1599 } while (cmd != NULL);
1600}
1601
1602static int vmcmd_init(void)
1603{
1604 if (!MACHINE_IS_VM)
b8e660b8 1605 return -EOPNOTSUPP;
99ca4e58
MH		 1606 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1607 if (!vmcmd_kset)
1608 return -ENOMEM;
1609 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1610}
1611
1612static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1613 vmcmd_run, vmcmd_init};
1614
1615/*
1616 * stop shutdown action: Stop Linux on shutdown.
1617 */
1618
1619static void stop_run(struct shutdown_trigger *trigger)
1620{
c6547497
MH		 1621 if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1622 disabled_wait((unsigned long) __builtin_return_address(0));
a93b8ec1 1623 while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
f8501ba7
HC		 1624 cpu_relax();
1625 for (;;);
99ca4e58
MH		 1626}
1627
1628static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1629 stop_run, NULL};
1630
1631/* action list */
1632
1633static struct shutdown_action *shutdown_actions_list[] = {
099b7651
FM		 1634 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1635 &vmcmd_action, &stop_action};
99ca4e58
MH		 1636#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1637
1638/*
1639 * Trigger section
1640 */
1641
1642static struct kset *shutdown_actions_kset;
1643
1644static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1645 size_t len)
1646{
1647 int i;
099b7651 1648
99ca4e58 1649 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
099b7651 1650 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
81088819
FM		 1651 if (shutdown_actions_list[i]->init_rc) {
1652 return shutdown_actions_list[i]->init_rc;
1653 } else {
1654 trigger->action = shutdown_actions_list[i];
1655 return len;
1656 }
99ca4e58
MH		 1657 }
1658 }
1659 return -EINVAL;
1660}
1661
1662/* on reipl */
1663
1664static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1665 &reipl_action};
1666
1667static ssize_t on_reboot_show(struct kobject *kobj,
1668 struct kobj_attribute *attr, char *page)
1669{
1670 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1671}
1672
1673static ssize_t on_reboot_store(struct kobject *kobj,
1674 struct kobj_attribute *attr,
1675 const char *buf, size_t len)
1676{
1677 return set_trigger(buf, &on_reboot_trigger, len);
1678}
1679
1680static struct kobj_attribute on_reboot_attr =
1681 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1682
1683static void do_machine_restart(char *__unused)
1684{
1685 smp_send_stop();
1686 on_reboot_trigger.action->fn(&on_reboot_trigger);
1687 reipl_run(NULL);
1688}
1689void (*_machine_restart)(char *command) = do_machine_restart;
1690
1691/* on panic */
1692
1693static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1694
1695static ssize_t on_panic_show(struct kobject *kobj,
1696 struct kobj_attribute *attr, char *page)
1697{
1698 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1699}
1700
1701static ssize_t on_panic_store(struct kobject *kobj,
1702 struct kobj_attribute *attr,
1703 const char *buf, size_t len)
1704{
1705 return set_trigger(buf, &on_panic_trigger, len);
1706}
1707
1708static struct kobj_attribute on_panic_attr =
1709 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1710
1711static void do_panic(void)
1712{
1713 on_panic_trigger.action->fn(&on_panic_trigger);
1714 stop_run(&on_panic_trigger);
1715}
1716
7dd6b334
MH		 1717/* on restart */
1718
1719static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1720 &reipl_action};
1721
1722static ssize_t on_restart_show(struct kobject *kobj,
1723 struct kobj_attribute *attr, char *page)
1724{
1725 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1726}
1727
1728static ssize_t on_restart_store(struct kobject *kobj,
1729 struct kobj_attribute *attr,
1730 const char *buf, size_t len)
1731{
1732 return set_trigger(buf, &on_restart_trigger, len);
1733}
1734
1735static struct kobj_attribute on_restart_attr =
1736 __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1737
1738void do_restart(void)
1739{
1740 smp_send_stop();
1741 on_restart_trigger.action->fn(&on_restart_trigger);
1742 stop_run(&on_restart_trigger);
1743}
1744
99ca4e58
MH		 1745/* on halt */
1746
1747static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1748
1749static ssize_t on_halt_show(struct kobject *kobj,
1750 struct kobj_attribute *attr, char *page)
1751{
1752 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1753}
1754
1755static ssize_t on_halt_store(struct kobject *kobj,
1756 struct kobj_attribute *attr,
1757 const char *buf, size_t len)
1758{
1759 return set_trigger(buf, &on_halt_trigger, len);
1760}
1761
1762static struct kobj_attribute on_halt_attr =
1763 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
ff6b8ea6 1764
99ca4e58
MH		 1765
1766static void do_machine_halt(void)
1767{
1768 smp_send_stop();
1769 on_halt_trigger.action->fn(&on_halt_trigger);
1770 stop_run(&on_halt_trigger);
1771}
1772void (*_machine_halt)(void) = do_machine_halt;
1773
1774/* on power off */
1775
1776static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1777
1778static ssize_t on_poff_show(struct kobject *kobj,
1779 struct kobj_attribute *attr, char *page)
1780{
1781 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1782}
1783
1784static ssize_t on_poff_store(struct kobject *kobj,
1785 struct kobj_attribute *attr,
1786 const char *buf, size_t len)
1787{
1788 return set_trigger(buf, &on_poff_trigger, len);
1789}
1790
1791static struct kobj_attribute on_poff_attr =
1792 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1793
1794
1795static void do_machine_power_off(void)
1796{
1797 smp_send_stop();
1798 on_poff_trigger.action->fn(&on_poff_trigger);
1799 stop_run(&on_poff_trigger);
1800}
1801void (*_machine_power_off)(void) = do_machine_power_off;
1802
1803static void __init shutdown_triggers_init(void)
1804{
d91885be 1805 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
f62ed9e3 1806 firmware_kobj);
d91885be 1807 if (!shutdown_actions_kset)
99ca4e58
MH		 1808 goto fail;
1809 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1810 &on_reboot_attr.attr))
1811 goto fail;
1812 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1813 &on_panic_attr.attr))
1814 goto fail;
1815 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1816 &on_halt_attr.attr))
1817 goto fail;
1818 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1819 &on_poff_attr.attr))
1820 goto fail;
7dd6b334
MH		 1821 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1822 &on_restart_attr.attr))
1823 goto fail;
99ca4e58
MH		 1824 return;
1825fail:
1826 panic("shutdown_triggers_init failed\n");
1827}
1828
1829static void __init shutdown_actions_init(void)
1830{
1831 int i;
1832
1833 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1834 if (!shutdown_actions_list[i]->init)
1835 continue;
81088819
FM		 1836 shutdown_actions_list[i]->init_rc =
1837 shutdown_actions_list[i]->init();
ff6b8ea6 1838 }
ff6b8ea6
MH		 1839}
1840
1841static int __init s390_ipl_init(void)
1842{
d09293ae 1843 sclp_get_ipl_info(&sclp_ipl_info);
99ca4e58
MH		 1844 shutdown_actions_init();
1845 shutdown_triggers_init();
ff6b8ea6
MH		 1846 return 0;
1847}
1848
1849__initcall(s390_ipl_init);
15e9b586 1850
99ca4e58
MH		 1851static void __init strncpy_skip_quote(char *dst, char *src, int n)
1852{
1853 int sx, dx;
1854
1855 dx = 0;
1856 for (sx = 0; src[sx] != 0; sx++) {
1857 if (src[sx] == '"')
1858 continue;
1859 dst[dx++] = src[sx];
1860 if (dx >= n)
1861 break;
1862 }
1863}
1864
1865static int __init vmcmd_on_reboot_setup(char *str)
1866{
1867 if (!MACHINE_IS_VM)
1868 return 1;
1869 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1870 vmcmd_on_reboot[127] = 0;
1871 on_reboot_trigger.action = &vmcmd_action;
1872 return 1;
1873}
1874__setup("vmreboot=", vmcmd_on_reboot_setup);
1875
1876static int __init vmcmd_on_panic_setup(char *str)
1877{
1878 if (!MACHINE_IS_VM)
1879 return 1;
1880 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1881 vmcmd_on_panic[127] = 0;
1882 on_panic_trigger.action = &vmcmd_action;
1883 return 1;
1884}
1885__setup("vmpanic=", vmcmd_on_panic_setup);
1886
1887static int __init vmcmd_on_halt_setup(char *str)
1888{
1889 if (!MACHINE_IS_VM)
1890 return 1;
1891 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1892 vmcmd_on_halt[127] = 0;
1893 on_halt_trigger.action = &vmcmd_action;
1894 return 1;
1895}
1896__setup("vmhalt=", vmcmd_on_halt_setup);
1897
1898static int __init vmcmd_on_poff_setup(char *str)
1899{
1900 if (!MACHINE_IS_VM)
1901 return 1;
1902 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1903 vmcmd_on_poff[127] = 0;
1904 on_poff_trigger.action = &vmcmd_action;
1905 return 1;
1906}
1907__setup("vmpoff=", vmcmd_on_poff_setup);
1908
1909static int on_panic_notify(struct notifier_block *self,
1910 unsigned long event, void *data)
1911{
1912 do_panic();
1913 return NOTIFY_OK;
1914}
1915
1916static struct notifier_block on_panic_nb = {
1917 .notifier_call = on_panic_notify,
7e9b580e 1918 .priority = INT_MIN,
99ca4e58
MH		 1919};
1920
1921void __init setup_ipl(void)
1922{
1923 ipl_info.type = get_ipl_type();
1924 switch (ipl_info.type) {
1925 case IPL_TYPE_CCW:
1926 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1927 ipl_info.data.ccw.dev_id.ssid = 0;
1928 break;
1929 case IPL_TYPE_FCP:
1930 case IPL_TYPE_FCP_DUMP:
1931 ipl_info.data.fcp.dev_id.devno =
1932 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1933 ipl_info.data.fcp.dev_id.ssid = 0;
1934 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1935 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1936 break;
1937 case IPL_TYPE_NSS:
1938 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1939 sizeof(ipl_info.data.nss.name));
1940 break;
1941 case IPL_TYPE_UNKNOWN:
99ca4e58
MH		 1942 /* We have no info to copy */
1943 break;
1944 }
1945 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1946}
1947
a0443fbb
HB		 1948void __init ipl_update_parameters(void)
1949{
3a95e8eb
MH		 1950 int rc;
1951
1952 rc = diag308(DIAG308_STORE, &ipl_block);
1953 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
a0443fbb
HB		 1954 diag308_set_works = 1;
1955}
1956
6fc321fd
HC		 1957void __init ipl_save_parameters(void)
1958{
1959 struct cio_iplinfo iplinfo;
6fc321fd
HC		 1960 void *src, *dst;
1961
1962 if (cio_get_iplinfo(&iplinfo))
1963 return;
1964
1965 ipl_devno = iplinfo.devno;
1966 ipl_flags |= IPL_DEVNO_VALID;
1967 if (!iplinfo.is_qdio)
1968 return;
1969 ipl_flags |= IPL_PARMBLOCK_VALID;
cbb870c8 1970 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
6fc321fd
HC		 1971 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1972 memmove(dst, src, PAGE_SIZE);
cbb870c8 1973 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
6fc321fd
HC		 1974}
1975
15e9b586
HC		 1976static LIST_HEAD(rcall);
1977static DEFINE_MUTEX(rcall_mutex);
1978
1979void register_reset_call(struct reset_call *reset)
1980{
1981 mutex_lock(&rcall_mutex);
1982 list_add(&reset->list, &rcall);
1983 mutex_unlock(&rcall_mutex);
1984}
1985EXPORT_SYMBOL_GPL(register_reset_call);
1986
1987void unregister_reset_call(struct reset_call *reset)
1988{
1989 mutex_lock(&rcall_mutex);
1990 list_del(&reset->list);
1991 mutex_unlock(&rcall_mutex);
1992}
1993EXPORT_SYMBOL_GPL(unregister_reset_call);
1994
1995static void do_reset_calls(void)
1996{
1997 struct reset_call *reset;
1998
9dc7356e
MH		 1999#ifdef CONFIG_64BIT
2000 if (diag308_set_works) {
2001 diag308_reset();
2002 return;
2003 }
2004#endif
15e9b586
HC		 2005 list_for_each_entry(reset, &rcall, list)
2006 reset->fn();
2007}
2008
c5dd8586 2009u32 dump_prefix_page;
15e9b586
HC		 2010
2011void s390_reset_system(void)
2012{
2013 struct _lowcore *lc;
2014
15e9b586 2015 lc = (struct _lowcore *)(unsigned long) store_prefix();
a45e1414
MH		 2016
2017 /* Stack for interrupt/machine check handler */
15e9b586
HC		 2018 lc->panic_stack = S390_lowcore.panic_stack;
2019
da1cf23e 2020 /* Save prefix page address for dump case */
c5dd8586 2021 dump_prefix_page = (u32)(unsigned long) lc;
da1cf23e 2022
15e9b586
HC		 2023 /* Disable prefixing */
2024 set_prefix(0);
2025
2026 /* Disable lowcore protection */
2027 __ctl_clear_bit(0,28);
2028
2029 /* Set new machine check handler */
c1821c2e 2030 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
15e9b586 2031 S390_lowcore.mcck_new_psw.addr =
ab14de6c 2032 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
a45e1414
MH		 2033
2034 /* Set new program check handler */
c1821c2e 2035 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
a45e1414 2036 S390_lowcore.program_new_psw.addr =
ab14de6c 2037 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
a45e1414 2038
15e9b586
HC		 2039 do_reset_calls();
2040}
99ca4e58 2041
Linux 6.x block layer and io_uring tree(s)