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Merge branch 'bind_unbind' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / arch / s390 / kernel / ipl.c
CommitLineData
ff6b8ea6 1/*
ff6b8ea6
MH		 2 * ipl/reipl/dump support for Linux on s390.
3 *
a53c8fab 4 * Copyright IBM Corp. 2005, 2012
ff6b8ea6
MH		 5 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
6 * Heiko Carstens <heiko.carstens@de.ibm.com>
7 * Volker Sameske <sameske@de.ibm.com>
8 */
9
10#include <linux/types.h>
3994a52b
PG		 11#include <linux/export.h>
12#include <linux/init.h>
ff6b8ea6
MH		 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>
60a0c68d 19#include <linux/crash_dump.h>
3ab121ab 20#include <linux/debug_locks.h>
1ec2772e 21#include <asm/diag.h>
46b05d26 22#include <asm/ipl.h>
ff6b8ea6
MH		 23#include <asm/smp.h>
24#include <asm/setup.h>
25#include <asm/cpcmd.h>
26#include <asm/cio.h>
03a4d208 27#include <asm/ebcdic.h>
15e9b586 28#include <asm/reset.h>
ab14de6c 29#include <asm/sclp.h>
159d1ff8 30#include <asm/checksum.h>
3ab121ab 31#include <asm/debug.h>
4857d4bb 32#include <asm/os_info.h>
638ad34a 33#include "entry.h"
ff6b8ea6
MH		 34
35#define IPL_PARM_BLOCK_VERSION 0
03a4d208 36
411ed322
MH		 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"
615b04b3 42
99ca4e58
MH		 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
7dd6b334 53 * - restart
99ca4e58
MH		 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"
7dd6b334 59#define ON_RESTART_STR "on_restart"
99ca4e58
MH		 60
61struct shutdown_action;
62struct shutdown_trigger {
63 char *name;
64 struct shutdown_action *action;
65};
66
67/*
099b7651 68 * The following shutdown action types are supported:
99ca4e58
MH		 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"
099b7651 75#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
99ca4e58
MH		 76
77struct shutdown_action {
78 char *name;
79 void (*fn) (struct shutdown_trigger *trigger);
80 int (*init) (void);
81088819 81 int init_rc;
99ca4e58
MH		 82};
83
ff6b8ea6
MH		 84static char *ipl_type_str(enum ipl_type type)
85{
86 switch (type) {
ff6b8ea6
MH		 87 case IPL_TYPE_CCW:
88 return IPL_CCW_STR;
89 case IPL_TYPE_FCP:
90 return IPL_FCP_STR;
411ed322
MH		 91 case IPL_TYPE_FCP_DUMP:
92 return IPL_FCP_DUMP_STR;
fe355b7f
HY		 93 case IPL_TYPE_NSS:
94 return IPL_NSS_STR;
ff6b8ea6
MH		 95 case IPL_TYPE_UNKNOWN:
96 default:
97 return IPL_UNKNOWN_STR;
98 }
99}
100
411ed322
MH		 101enum dump_type {
102 DUMP_TYPE_NONE = 1,
103 DUMP_TYPE_CCW = 2,
104 DUMP_TYPE_FCP = 4,
105};
106
411ed322
MH		 107static 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 */
72a9b02d
HC		 125static u8 ipl_ssid __section(.data) = 0;
126static u16 ipl_devno __section(.data) = 0;
127u32 ipl_flags __section(.data) = 0;
411ed322 128
ff6b8ea6 129enum ipl_method {
411ed322
MH		 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,
a0443fbb 138 REIPL_METHOD_NSS_DIAG,
411ed322
MH		 139 REIPL_METHOD_DEFAULT,
140};
141
142enum 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,
ff6b8ea6
MH		 148};
149
ff6b8ea6
MH		 150static int diag308_set_works = 0;
151
a0443fbb
HB		 152static struct ipl_parameter_block ipl_block;
153
ff6b8ea6 154static int reipl_capabilities = IPL_TYPE_UNKNOWN;
fe355b7f 155
ff6b8ea6 156static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
411ed322 157static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
ff6b8ea6
MH		 158static struct ipl_parameter_block *reipl_block_fcp;
159static struct ipl_parameter_block *reipl_block_ccw;
a0443fbb 160static struct ipl_parameter_block *reipl_block_nss;
099b7651 161static struct ipl_parameter_block *reipl_block_actual;
fe355b7f 162
411ed322
MH		 163static int dump_capabilities = DUMP_TYPE_NONE;
164static enum dump_type dump_type = DUMP_TYPE_NONE;
165static enum dump_method dump_method = DUMP_METHOD_NONE;
ff6b8ea6
MH		 166static struct ipl_parameter_block *dump_block_fcp;
167static struct ipl_parameter_block *dump_block_ccw;
168
05dd2530
HC		 169static struct sclp_ipl_info sclp_ipl_info;
170
1ec2772e 171static inline int __diag308(unsigned long subcode, void *addr)
ff6b8ea6 172{
94c12cc7 173 register unsigned long _addr asm("0") = (unsigned long) addr;
ff6b8ea6
MH		 174 register unsigned long _rc asm("1") = 0;
175
94c12cc7
MS		 176 asm volatile(
177 " diag %0,%2,0x308\n"
6c22c986 178 "0: nopr %%r7\n"
94c12cc7 179 EX_TABLE(0b,0b)
ff6b8ea6 180 : "+d" (_addr), "+d" (_rc)
94c12cc7 181 : "d" (subcode) : "cc", "memory");
ff6b8ea6
MH		 182 return _rc;
183}
1ec2772e
MS		 184
185int diag308(unsigned long subcode, void *addr)
186{
187 diag_stat_inc(DIAG_STAT_X308);
188 return __diag308(subcode, addr);
189}
411ed322 190EXPORT_SYMBOL_GPL(diag308);
ff6b8ea6
MH		 191
192/* SYSFS */
193
3be7ae63 194#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
9b949165
GKH		 195static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
196 struct kobj_attribute *attr, \
ff6b8ea6
MH		 197 char *page) \
198{ \
3be7ae63
SO		 199 return snprintf(page, PAGE_SIZE, _format, ##args); \
200}
201
18e22a17
SO		 202#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
203static 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) \
221IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
222 _ipl_blk.ssid, _ipl_blk.devno); \
223IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
224static 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
3be7ae63
SO		 229#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
230IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
9b949165 231static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
3be7ae63 232 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
ff6b8ea6
MH		 233
234#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
3be7ae63 235IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
9b949165
GKH		 236static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
237 struct kobj_attribute *attr, \
ff6b8ea6
MH		 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} \
9b949165 246static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
ff6b8ea6
MH		 247 __ATTR(_name,(S_IRUGO | S_IWUSR), \
248 sys_##_prefix##_##_name##_show, \
3be7ae63 249 sys_##_prefix##_##_name##_store)
ff6b8ea6 250
fe355b7f 251#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
3be7ae63 252IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
9b949165
GKH		 253static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
254 struct kobj_attribute *attr, \
fe355b7f
HY		 255 const char *buf, size_t len) \
256{ \
99ca4e58 257 strncpy(_value, buf, sizeof(_value) - 1); \
1d802e24 258 strim(_value); \
fe355b7f
HY		 259 return len; \
260} \
9b949165 261static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
fe355b7f
HY		 262 __ATTR(_name,(S_IRUGO | S_IWUSR), \
263 sys_##_prefix##_##_name##_show, \
3be7ae63 264 sys_##_prefix##_##_name##_store)
fe355b7f 265
ff6b8ea6
MH		 266static 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
411ed322 278static __init enum ipl_type get_ipl_type(void)
ff6b8ea6
MH		 279{
280 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
281
fe355b7f
HY		 282 if (ipl_flags & IPL_NSS_VALID)
283 return IPL_TYPE_NSS;
e87bfe51 284 if (!(ipl_flags & IPL_DEVNO_VALID))
ff6b8ea6 285 return IPL_TYPE_UNKNOWN;
e87bfe51 286 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
ff6b8ea6
MH		 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;
411ed322
MH		 292 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
293 return IPL_TYPE_FCP_DUMP;
ff6b8ea6
MH		 294 return IPL_TYPE_FCP;
295}
296
411ed322
MH		 297struct ipl_info ipl_info;
298EXPORT_SYMBOL_GPL(ipl_info);
299
9b949165
GKH		 300static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
301 char *page)
ff6b8ea6 302{
411ed322 303 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
ff6b8ea6
MH		 304}
305
9b949165 306static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
ff6b8ea6 307
a0443fbb 308/* VM IPL PARM routines */
c4736d96
MS		 309static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
310 const struct ipl_parameter_block *ipb)
a0443fbb
HB		 311{
312 int i;
684d2fd4 313 size_t len;
a0443fbb
HB		 314 char has_lowercase = 0;
315
684d2fd4 316 len = 0;
a0443fbb
HB		 317 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
318 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
319
684d2fd4 320 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
a0443fbb
HB		 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;
684d2fd4
HB		 337
338 return len;
a0443fbb
HB		 339}
340
684d2fd4 341size_t append_ipl_vmparm(char *dest, size_t size)
a0443fbb 342{
684d2fd4
HB		 343 size_t rc;
344
345 rc = 0;
a0443fbb 346 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
684d2fd4 347 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
a0443fbb
HB		 348 else
349 dest[0] = 0;
684d2fd4 350 return rc;
a0443fbb
HB		 351}
352
353static 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
684d2fd4 358 append_ipl_vmparm(parm, sizeof(parm));
a0443fbb
HB		 359 return sprintf(page, "%s\n", parm);
360}
361
684d2fd4
HB		 362static 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
c4736d96
MS		 372static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
373 const struct ipl_parameter_block *ipb)
684d2fd4
HB		 374{
375 size_t count;
376 size_t i;
18d00acf 377 int has_lowercase;
684d2fd4
HB		 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
18d00acf
HB		 384 has_lowercase = 0;
385 for (i = 0; i < count; i++) {
684d2fd4
HB		 386 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
387 count = 0;
388 goto out;
389 }
18d00acf
HB		 390 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
391 has_lowercase = 1;
392 }
684d2fd4 393
18d00acf
HB		 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]);
684d2fd4
HB		 399out:
400 dest[count] = '\0';
401 return count;
402}
403
404size_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
a0443fbb
HB		 417static struct kobj_attribute sys_ipl_vm_parm_attr =
418 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
419
9b949165
GKH		 420static ssize_t sys_ipl_device_show(struct kobject *kobj,
421 struct kobj_attribute *attr, char *page)
ff6b8ea6
MH		 422{
423 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
424
411ed322 425 switch (ipl_info.type) {
ff6b8ea6 426 case IPL_TYPE_CCW:
18e22a17 427 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
ff6b8ea6 428 case IPL_TYPE_FCP:
411ed322 429 case IPL_TYPE_FCP_DUMP:
ff6b8ea6
MH		 430 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
431 default:
432 return 0;
433 }
434}
435
9b949165 436static struct kobj_attribute sys_ipl_device_attr =
ff6b8ea6
MH		 437 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
438
2c3c8bea
CW		 439static 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)
ff6b8ea6 442{
0788fea4
AM		 443 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
444 IPL_PARMBLOCK_SIZE);
ff6b8ea6 445}
22d557ab
SO		 446static struct bin_attribute ipl_parameter_attr =
447 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
448 PAGE_SIZE);
ff6b8ea6 449
2c3c8bea
CW		 450static 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)
ff6b8ea6
MH		 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
0788fea4 457 return memory_read_from_buffer(buf, count, &off, scp_data, size);
ff6b8ea6 458}
22d557ab
SO		 459static struct bin_attribute ipl_scp_data_attr =
460 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
ff6b8ea6 461
22d557ab
SO		 462static struct bin_attribute *ipl_fcp_bin_attrs[] = {
463 &ipl_parameter_attr,
464 &ipl_scp_data_attr,
465 NULL,
ff6b8ea6
MH		 466};
467
468/* FCP ipl device attributes */
469
470DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
471 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
472DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
473 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
474DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
475 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
476DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
477 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
478
9b949165
GKH		 479static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
480 struct kobj_attribute *attr, char *page)
03a4d208
MH		 481{
482 char loadparm[LOADPARM_LEN + 1] = {};
483
05dd2530 484 if (!sclp_ipl_info.is_valid)
03a4d208 485 return sprintf(page, "#unknown#\n");
05dd2530 486 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
03a4d208 487 EBCASC(loadparm, LOADPARM_LEN);
1d802e24 488 strim(loadparm);
03a4d208
MH		 489 return sprintf(page, "%s\n", loadparm);
490}
491
9b949165 492static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
03a4d208
MH		 493 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
494
69928601
MH		 495static 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
506static struct attribute_group ipl_fcp_attr_group = {
507 .attrs = ipl_fcp_attrs,
22d557ab 508 .bin_attrs = ipl_fcp_bin_attrs,
69928601
MH		 509};
510
511/* CCW ipl device attributes */
512
a0443fbb
HB		 513static 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
521static struct attribute *ipl_ccw_attrs_lpar[] = {
ff6b8ea6
MH		 522 &sys_ipl_type_attr.attr,
523 &sys_ipl_device_attr.attr,
03a4d208 524 &sys_ipl_ccw_loadparm_attr.attr,
ff6b8ea6
MH		 525 NULL,
526};
527
a0443fbb
HB		 528static struct attribute_group ipl_ccw_attr_group_vm = {
529 .attrs = ipl_ccw_attrs_vm,
530};
531
532static struct attribute_group ipl_ccw_attr_group_lpar = {
533 .attrs = ipl_ccw_attrs_lpar
ff6b8ea6
MH		 534};
535
fe355b7f
HY		 536/* NSS ipl device attributes */
537
538DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
539
540static struct attribute *ipl_nss_attrs[] = {
541 &sys_ipl_type_attr.attr,
542 &sys_ipl_nss_name_attr.attr,
a0443fbb
HB		 543 &sys_ipl_ccw_loadparm_attr.attr,
544 &sys_ipl_vm_parm_attr.attr,
fe355b7f
HY		 545 NULL,
546};
547
548static struct attribute_group ipl_nss_attr_group = {
549 .attrs = ipl_nss_attrs,
550};
551
ff6b8ea6
MH		 552/* UNKNOWN ipl device attributes */
553
554static struct attribute *ipl_unknown_attrs[] = {
555 &sys_ipl_type_attr.attr,
556 NULL,
557};
558
559static struct attribute_group ipl_unknown_attr_group = {
560 .attrs = ipl_unknown_attrs,
561};
562
d91885be 563static struct kset *ipl_kset;
ff6b8ea6 564
2c2df118 565static void __ipl_run(void *unused)
99ca4e58 566{
0599eead 567 diag308(DIAG308_LOAD_CLEAR, NULL);
99ca4e58
MH		 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
2c2df118
HC		 574static void ipl_run(struct shutdown_trigger *trigger)
575{
8b646bd7 576 smp_call_ipl_cpu(__ipl_run, NULL);
2c2df118
HC		 577}
578
2bc89b5e 579static int __init ipl_init(void)
99ca4e58
MH		 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:
a0443fbb
HB		 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);
99ca4e58
MH		 596 break;
597 case IPL_TYPE_FCP:
598 case IPL_TYPE_FCP_DUMP:
22d557ab 599 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
99ca4e58
MH		 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 }
609out:
610 if (rc)
611 panic("ipl_init failed: rc = %i\n", rc);
612
613 return 0;
614}
615
2bc89b5e
HC		 616static struct shutdown_action __refdata ipl_action = {
617 .name = SHUTDOWN_ACTION_IPL_STR,
618 .fn = ipl_run,
619 .init = ipl_init,
620};
99ca4e58 621
ff6b8ea6 622/*
99ca4e58 623 * reipl shutdown action: Reboot Linux on shutdown.
ff6b8ea6
MH		 624 */
625
a0443fbb
HB		 626/* VM IPL PARM attributes */
627static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
628 char *page)
629{
630 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
631
684d2fd4 632 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
a0443fbb
HB		 633 return sprintf(page, "%s\n", vmparm);
634}
635
636static 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 */
669static 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
675static 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 */
683static 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
689static 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
696static struct kobj_attribute sys_reipl_nss_vmparm_attr =
697 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
698 reipl_nss_vmparm_store);
699static 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
ff6b8ea6
MH		 703/* FCP reipl device attributes */
704
2c3c8bea 705static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
684d2fd4
HB		 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
2c3c8bea 715static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
684d2fd4
HB		 716 struct bin_attribute *attr,
717 char *buf, loff_t off, size_t count)
718{
e0bedada 719 size_t scpdata_len = count;
684d2fd4 720 size_t padding;
684d2fd4 721
684d2fd4 722
e0bedada
SO		 723 if (off)
724 return -EINVAL;
684d2fd4 725
e0bedada 726 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
684d2fd4
HB		 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}
22d557ab
SO		 740static struct bin_attribute sys_reipl_fcp_scp_data_attr =
741 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
e0bedada 742 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
684d2fd4 743
22d557ab
SO		 744static struct bin_attribute *reipl_fcp_bin_attrs[] = {
745 &sys_reipl_fcp_scp_data_attr,
746 NULL,
684d2fd4
HB		 747};
748
eda4ddf7 749DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
ff6b8ea6 750 reipl_block_fcp->ipl_info.fcp.wwpn);
eda4ddf7 751DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
ff6b8ea6
MH		 752 reipl_block_fcp->ipl_info.fcp.lun);
753DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
754 reipl_block_fcp->ipl_info.fcp.bootprog);
755DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
756 reipl_block_fcp->ipl_info.fcp.br_lba);
757DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
758 reipl_block_fcp->ipl_info.fcp.devno);
759
a0443fbb
HB		 760static void reipl_get_ascii_loadparm(char *loadparm,
761 struct ipl_parameter_block *ibp)
03a4d208 762{
69928601 763 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
03a4d208
MH		 764 EBCASC(loadparm, LOADPARM_LEN);
765 loadparm[LOADPARM_LEN] = 0;
1d802e24 766 strim(loadparm);
03a4d208
MH		 767}
768
a0443fbb
HB		 769static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
770 char *page)
03a4d208
MH		 771{
772 char buf[LOADPARM_LEN + 1];
773
a0443fbb 774 reipl_get_ascii_loadparm(buf, ipb);
03a4d208
MH		 775 return sprintf(page, "%s\n", buf);
776}
777
a0443fbb
HB		 778static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
779 const char *buf, size_t len)
03a4d208
MH		 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 */
69928601 798 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
03a4d208 799 /* copy and convert to ebcdic */
69928601
MH		 800 memcpy(ipb->hdr.loadparm, buf, lp_len);
801 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
03a4d208
MH		 802 return len;
803}
804
69928601
MH		 805/* FCP wrapper */
806static 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
812static 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
819static 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
823static 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
833static struct attribute_group reipl_fcp_attr_group = {
834 .attrs = reipl_fcp_attrs,
22d557ab 835 .bin_attrs = reipl_fcp_bin_attrs,
69928601
MH		 836};
837
838/* CCW reipl device attributes */
18e22a17 839DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
69928601 840
a0443fbb
HB		 841/* NSS wrapper */
842static 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
848static 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 */
856static 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
862static 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
9b949165 869static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
a0443fbb
HB		 870 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
871 reipl_ccw_loadparm_store);
872
873static 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};
03a4d208 879
a0443fbb 880static struct attribute *reipl_ccw_attrs_lpar[] = {
ff6b8ea6 881 &sys_reipl_ccw_device_attr.attr,
03a4d208 882 &sys_reipl_ccw_loadparm_attr.attr,
ff6b8ea6
MH		 883 NULL,
884};
885
a0443fbb 886static struct attribute_group reipl_ccw_attr_group_vm = {
ff6b8ea6 887 .name = IPL_CCW_STR,
a0443fbb
HB		 888 .attrs = reipl_ccw_attrs_vm,
889};
890
891static struct attribute_group reipl_ccw_attr_group_lpar = {
892 .name = IPL_CCW_STR,
893 .attrs = reipl_ccw_attrs_lpar,
ff6b8ea6
MH		 894};
895
fe355b7f
HY		 896
897/* NSS reipl device attributes */
a0443fbb
HB		 898static 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
906static 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
915static 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--;
fe355b7f 925
a0443fbb
HB		 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
944static 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
948static struct kobj_attribute sys_reipl_nss_loadparm_attr =
949 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
950 reipl_nss_loadparm_store);
fe355b7f
HY		 951
952static struct attribute *reipl_nss_attrs[] = {
953 &sys_reipl_nss_name_attr.attr,
a0443fbb
HB		 954 &sys_reipl_nss_loadparm_attr.attr,
955 &sys_reipl_nss_vmparm_attr.attr,
fe355b7f
HY		 956 NULL,
957};
958
959static struct attribute_group reipl_nss_attr_group = {
960 .name = IPL_NSS_STR,
961 .attrs = reipl_nss_attrs,
962};
963
4857d4bb
MH		 964static 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
ff6b8ea6
MH		 971/* reipl type */
972
973static 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:
48657d22
MH		 980 if (diag308_set_works)
981 reipl_method = REIPL_METHOD_CCW_DIAG;
982 else if (MACHINE_IS_VM)
411ed322 983 reipl_method = REIPL_METHOD_CCW_VM;
ff6b8ea6 984 else
411ed322 985 reipl_method = REIPL_METHOD_CCW_CIO;
4857d4bb 986 set_reipl_block_actual(reipl_block_ccw);
ff6b8ea6
MH		 987 break;
988 case IPL_TYPE_FCP:
989 if (diag308_set_works)
411ed322 990 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
ff6b8ea6 991 else if (MACHINE_IS_VM)
411ed322 992 reipl_method = REIPL_METHOD_FCP_RO_VM;
ff6b8ea6 993 else
411ed322 994 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
4857d4bb 995 set_reipl_block_actual(reipl_block_fcp);
411ed322
MH		 996 break;
997 case IPL_TYPE_FCP_DUMP:
998 reipl_method = REIPL_METHOD_FCP_DUMP;
ff6b8ea6 999 break;
fe355b7f 1000 case IPL_TYPE_NSS:
a0443fbb
HB		 1001 if (diag308_set_works)
1002 reipl_method = REIPL_METHOD_NSS_DIAG;
1003 else
1004 reipl_method = REIPL_METHOD_NSS;
4857d4bb 1005 set_reipl_block_actual(reipl_block_nss);
411ed322
MH		 1006 break;
1007 case IPL_TYPE_UNKNOWN:
1008 reipl_method = REIPL_METHOD_DEFAULT;
fe355b7f 1009 break;
ff6b8ea6 1010 default:
411ed322 1011 BUG();
ff6b8ea6
MH		 1012 }
1013 reipl_type = type;
1014 return 0;
1015}
1016
9b949165
GKH		 1017static ssize_t reipl_type_show(struct kobject *kobj,
1018 struct kobj_attribute *attr, char *page)
ff6b8ea6
MH		 1019{
1020 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1021}
1022
9b949165
GKH		 1023static ssize_t reipl_type_store(struct kobject *kobj,
1024 struct kobj_attribute *attr,
1025 const char *buf, size_t len)
ff6b8ea6
MH		 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);
fe355b7f
HY		 1033 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1034 rc = reipl_set_type(IPL_TYPE_NSS);
ff6b8ea6
MH		 1035 return (rc != 0) ? rc : len;
1036}
1037
9b949165 1038static struct kobj_attribute reipl_type_attr =
99ca4e58 1039 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
ff6b8ea6 1040
d91885be 1041static struct kset *reipl_kset;
684d2fd4 1042static struct kset *reipl_fcp_kset;
ff6b8ea6 1043
a0443fbb
HB		 1044static 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);
684d2fd4 1054 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
a0443fbb
HB		 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
2c2df118 1072static void __reipl_run(void *unused)
ff6b8ea6
MH		 1073{
1074 struct ccw_dev_id devid;
a0443fbb 1075 static char buf[128];
ff6b8ea6 1076
ff6b8ea6 1077 switch (reipl_method) {
411ed322 1078 case REIPL_METHOD_CCW_CIO:
18e22a17 1079 devid.ssid = reipl_block_ccw->ipl_info.ccw.ssid;
ff6b8ea6 1080 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
ff6b8ea6
MH		 1081 reipl_ccw_dev(&devid);
1082 break;
411ed322 1083 case REIPL_METHOD_CCW_VM:
a0443fbb 1084 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
740b5706 1085 __cpcmd(buf, NULL, 0, NULL);
ff6b8ea6 1086 break;
411ed322 1087 case REIPL_METHOD_CCW_DIAG:
ff6b8ea6 1088 diag308(DIAG308_SET, reipl_block_ccw);
4130b28f 1089 diag308(DIAG308_LOAD_CLEAR, NULL);
ff6b8ea6 1090 break;
411ed322 1091 case REIPL_METHOD_FCP_RW_DIAG:
ff6b8ea6 1092 diag308(DIAG308_SET, reipl_block_fcp);
0599eead 1093 diag308(DIAG308_LOAD_CLEAR, NULL);
ff6b8ea6 1094 break;
411ed322 1095 case REIPL_METHOD_FCP_RO_DIAG:
0599eead 1096 diag308(DIAG308_LOAD_CLEAR, NULL);
ff6b8ea6 1097 break;
411ed322 1098 case REIPL_METHOD_FCP_RO_VM:
740b5706 1099 __cpcmd("IPL", NULL, 0, NULL);
ff6b8ea6 1100 break;
a0443fbb
HB		 1101 case REIPL_METHOD_NSS_DIAG:
1102 diag308(DIAG308_SET, reipl_block_nss);
0599eead 1103 diag308(DIAG308_LOAD_CLEAR, NULL);
a0443fbb 1104 break;
411ed322 1105 case REIPL_METHOD_NSS:
a0443fbb 1106 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
fe355b7f
HY		 1107 __cpcmd(buf, NULL, 0, NULL);
1108 break;
411ed322 1109 case REIPL_METHOD_DEFAULT:
ff6b8ea6 1110 if (MACHINE_IS_VM)
740b5706 1111 __cpcmd("IPL", NULL, 0, NULL);
0599eead 1112 diag308(DIAG308_LOAD_CLEAR, NULL);
ff6b8ea6 1113 break;
411ed322 1114 case REIPL_METHOD_FCP_DUMP:
411ed322 1115 break;
ff6b8ea6 1116 }
208e5591 1117 disabled_wait((unsigned long) __builtin_return_address(0));
ff6b8ea6
MH		 1118}
1119
2c2df118
HC		 1120static void reipl_run(struct shutdown_trigger *trigger)
1121{
8b646bd7 1122 smp_call_ipl_cpu(__reipl_run, NULL);
2c2df118
HC		 1123}
1124
a0443fbb 1125static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
ff6b8ea6 1126{
a0443fbb
HB		 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}
ff6b8ea6 1132
a0443fbb
HB		 1133static 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)
69928601 1138 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
a0443fbb
HB		 1139 else
1140 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
69928601 1141 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
a0443fbb
HB		 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 }
ff6b8ea6
MH		 1154}
1155
99ca4e58 1156static int __init reipl_nss_init(void)
ff6b8ea6
MH		 1157{
1158 int rc;
1159
99ca4e58
MH		 1160 if (!MACHINE_IS_VM)
1161 return 0;
a0443fbb
HB		 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
99ca4e58 1170 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
fe355b7f
HY		 1171 if (rc)
1172 return rc;
a0443fbb
HB		 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
fe355b7f
HY		 1187 reipl_capabilities |= IPL_TYPE_NSS;
1188 return 0;
1189}
1190
ff6b8ea6
MH		 1191static 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;
a0443fbb
HB		 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);
ff6b8ea6 1209 }
a0443fbb
HB		 1210 if (rc)
1211 return rc;
1212
1213 reipl_block_ccw_init(reipl_block_ccw);
1214 if (ipl_info.type == IPL_TYPE_CCW) {
18e22a17 1215 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
ff6b8ea6 1216 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
a0443fbb
HB		 1217 reipl_block_ccw_fill_parms(reipl_block_ccw);
1218 }
1219
ff6b8ea6
MH		 1220 reipl_capabilities |= IPL_TYPE_CCW;
1221 return 0;
1222}
1223
1224static int __init reipl_fcp_init(void)
1225{
1226 int rc;
1227
008d2d11 1228 if (!diag308_set_works) {
684d2fd4 1229 if (ipl_info.type == IPL_TYPE_FCP) {
008d2d11 1230 make_attrs_ro(reipl_fcp_attrs);
684d2fd4
HB		 1231 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1232 } else
008d2d11
MH		 1233 return 0;
1234 }
ff6b8ea6
MH		 1235
1236 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1237 if (!reipl_block_fcp)
1238 return -ENOMEM;
684d2fd4
HB		 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);
798620fb 1243 if (!reipl_fcp_kset) {
684d2fd4
HB		 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);
ff6b8ea6 1249 if (rc) {
684d2fd4
HB		 1250 kset_unregister(reipl_fcp_kset);
1251 free_page((unsigned long) reipl_block_fcp);
ff6b8ea6
MH		 1252 return rc;
1253 }
684d2fd4 1254
69928601 1255 if (ipl_info.type == IPL_TYPE_FCP) {
ff6b8ea6 1256 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
69928601
MH		 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 {
ff6b8ea6
MH		 1265 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1266 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
fbb04f38 1267 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
ff6b8ea6
MH		 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
4857d4bb
MH		 1275static 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 }
1294out:
1295 return reipl_set_type(reipl_type);
1296}
1297
2bc89b5e 1298static int __init reipl_init(void)
ff6b8ea6
MH		 1299{
1300 int rc;
1301
f62ed9e3 1302 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
d91885be
GKH		 1303 if (!reipl_kset)
1304 return -ENOMEM;
1305 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
ff6b8ea6 1306 if (rc) {
d91885be 1307 kset_unregister(reipl_kset);
ff6b8ea6
MH		 1308 return rc;
1309 }
1310 rc = reipl_ccw_init();
1311 if (rc)
1312 return rc;
1313 rc = reipl_fcp_init();
fe355b7f
HY		 1314 if (rc)
1315 return rc;
1316 rc = reipl_nss_init();
ff6b8ea6
MH		 1317 if (rc)
1318 return rc;
4857d4bb 1319 return reipl_type_init();
ff6b8ea6
MH		 1320}
1321
2bc89b5e
HC		 1322static struct shutdown_action __refdata reipl_action = {
1323 .name = SHUTDOWN_ACTION_REIPL_STR,
1324 .fn = reipl_run,
1325 .init = reipl_init,
1326};
99ca4e58
MH		 1327
1328/*
1329 * dump shutdown action: Dump Linux on shutdown.
1330 */
1331
1332/* FCP dump device attributes */
1333
eda4ddf7 1334DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
99ca4e58 1335 dump_block_fcp->ipl_info.fcp.wwpn);
eda4ddf7 1336DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
99ca4e58
MH		 1337 dump_block_fcp->ipl_info.fcp.lun);
1338DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1339 dump_block_fcp->ipl_info.fcp.bootprog);
1340DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1341 dump_block_fcp->ipl_info.fcp.br_lba);
1342DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1343 dump_block_fcp->ipl_info.fcp.devno);
1344
1345static 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
1354static struct attribute_group dump_fcp_attr_group = {
1355 .name = IPL_FCP_STR,
1356 .attrs = dump_fcp_attrs,
1357};
1358
1359/* CCW dump device attributes */
18e22a17 1360DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
99ca4e58
MH		 1361
1362static struct attribute *dump_ccw_attrs[] = {
1363 &sys_dump_ccw_device_attr.attr,
1364 NULL,
1365};
1366
1367static struct attribute_group dump_ccw_attr_group = {
1368 .name = IPL_CCW_STR,
1369 .attrs = dump_ccw_attrs,
1370};
1371
1372/* dump type */
1373
1374static 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:
48657d22
MH		 1380 if (diag308_set_works)
1381 dump_method = DUMP_METHOD_CCW_DIAG;
1382 else if (MACHINE_IS_VM)
99ca4e58
MH		 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
1397static 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
1403static 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
1418static struct kobj_attribute dump_type_attr =
1419 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1420
1421static struct kset *dump_kset;
1422
0894b3ae
MH		 1423static void diag308_dump(void *dump_block)
1424{
1425 diag308(DIAG308_SET, dump_block);
1426 while (1) {
0599eead 1427 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
0894b3ae
MH		 1428 break;
1429 udelay_simple(USEC_PER_SEC);
1430 }
1431}
1432
2c2df118 1433static void __dump_run(void *unused)
99ca4e58
MH		 1434{
1435 struct ccw_dev_id devid;
1436 static char buf[100];
1437
1438 switch (dump_method) {
1439 case DUMP_METHOD_CCW_CIO:
18e22a17 1440 devid.ssid = dump_block_ccw->ipl_info.ccw.ssid;
99ca4e58 1441 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
99ca4e58
MH		 1442 reipl_ccw_dev(&devid);
1443 break;
1444 case DUMP_METHOD_CCW_VM:
99ca4e58
MH		 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:
0894b3ae 1451 diag308_dump(dump_block_ccw);
99ca4e58
MH		 1452 break;
1453 case DUMP_METHOD_FCP_DIAG:
0894b3ae 1454 diag308_dump(dump_block_fcp);
99ca4e58 1455 break;
2c2df118
HC		 1456 default:
1457 break;
99ca4e58 1458 }
2c2df118
HC		 1459}
1460
1461static void dump_run(struct shutdown_trigger *trigger)
1462{
1463 if (dump_method == DUMP_METHOD_NONE)
1464 return;
1465 smp_send_stop();
8b646bd7 1466 smp_call_ipl_cpu(__dump_run, NULL);
99ca4e58
MH		 1467}
1468
ff6b8ea6
MH		 1469static 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;
d91885be 1476 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
ff6b8ea6
MH		 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;
fbb04f38 1483 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
ff6b8ea6 1484 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
411ed322 1485 dump_capabilities |= DUMP_TYPE_CCW;
ff6b8ea6
MH		 1486 return 0;
1487}
1488
ff6b8ea6
MH		 1489static int __init dump_fcp_init(void)
1490{
1491 int rc;
1492
05dd2530 1493 if (!sclp_ipl_info.has_dump)
ff6b8ea6
MH		 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;
d91885be 1500 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
ff6b8ea6
MH		 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;
fbb04f38 1507 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
ff6b8ea6
MH		 1508 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1509 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
411ed322 1510 dump_capabilities |= DUMP_TYPE_FCP;
ff6b8ea6
MH		 1511 return 0;
1512}
1513
2bc89b5e 1514static int __init dump_init(void)
ff6b8ea6
MH		 1515{
1516 int rc;
1517
f62ed9e3 1518 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
d91885be
GKH		 1519 if (!dump_kset)
1520 return -ENOMEM;
99ca4e58 1521 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
ff6b8ea6 1522 if (rc) {
d91885be 1523 kset_unregister(dump_kset);
ff6b8ea6
MH		 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;
411ed322 1532 dump_set_type(DUMP_TYPE_NONE);
ff6b8ea6
MH		 1533 return 0;
1534}
1535
2bc89b5e
HC		 1536static struct shutdown_action __refdata dump_action = {
1537 .name = SHUTDOWN_ACTION_DUMP_STR,
1538 .fn = dump_run,
1539 .init = dump_init,
1540};
99ca4e58 1541
099b7651
FM		 1542static void dump_reipl_run(struct shutdown_trigger *trigger)
1543{
a7df7a94 1544 unsigned long ipib = (unsigned long) reipl_block_actual;
fbe76568
HC		 1545 unsigned int csum;
1546
90b3baa2
HC		 1547 csum = (__force unsigned int)
1548 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
fbe76568
HC		 1549 mem_assign_absolute(S390_lowcore.ipib, ipib);
1550 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
099b7651
FM		 1551 dump_run(trigger);
1552}
1553
1554static int __init dump_reipl_init(void)
1555{
1556 if (!diag308_set_works)
1557 return -EOPNOTSUPP;
1558 else
1559 return 0;
1560}
1561
1562static 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
99ca4e58
MH		 1568/*
1569 * vmcmd shutdown action: Trigger vm command on shutdown.
1570 */
1571
1572static char vmcmd_on_reboot[128];
1573static char vmcmd_on_panic[128];
1574static char vmcmd_on_halt[128];
1575static char vmcmd_on_poff[128];
7dd6b334 1576static char vmcmd_on_restart[128];
99ca4e58
MH		 1577
1578DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1579DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1580DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1581DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
7dd6b334 1582DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
99ca4e58
MH		 1583
1584static 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,
7dd6b334 1589 &sys_vmcmd_on_restart_attr.attr,
99ca4e58
MH		 1590 NULL,
1591};
1592
1593static struct attribute_group vmcmd_attr_group = {
1594 .attrs = vmcmd_attrs,
1595};
1596
1597static struct kset *vmcmd_kset;
1598
1599static void vmcmd_run(struct shutdown_trigger *trigger)
ff6b8ea6 1600{
8143adaf 1601 char *cmd;
99ca4e58
MH		 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;
7dd6b334
MH		 1611 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1612 cmd = vmcmd_on_restart;
99ca4e58
MH		 1613 else
1614 return;
1615
1616 if (strlen(cmd) == 0)
1617 return;
8143adaf 1618 __cpcmd(cmd, NULL, 0, NULL);
99ca4e58
MH		 1619}
1620
1621static int vmcmd_init(void)
1622{
1623 if (!MACHINE_IS_VM)
b8e660b8 1624 return -EOPNOTSUPP;
99ca4e58
MH		 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
1631static 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
1638static void stop_run(struct shutdown_trigger *trigger)
1639{
e1202eda
MH		 1640 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1641 strcmp(trigger->name, ON_RESTART_STR) == 0)
c6547497 1642 disabled_wait((unsigned long) __builtin_return_address(0));
8b646bd7 1643 smp_stop_cpu();
99ca4e58
MH		 1644}
1645
1646static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1647 stop_run, NULL};
1648
1649/* action list */
1650
1651static struct shutdown_action *shutdown_actions_list[] = {
099b7651
FM		 1652 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1653 &vmcmd_action, &stop_action};
99ca4e58
MH		 1654#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1655
1656/*
1657 * Trigger section
1658 */
1659
1660static struct kset *shutdown_actions_kset;
1661
1662static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1663 size_t len)
1664{
1665 int i;
099b7651 1666
99ca4e58 1667 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
099b7651 1668 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
81088819
FM		 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 }
99ca4e58
MH		 1675 }
1676 }
1677 return -EINVAL;
1678}
1679
1680/* on reipl */
1681
1682static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1683 &reipl_action};
1684
1685static 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
1691static 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}
0f024379 1697static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
99ca4e58
MH		 1698
1699static 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}
1705void (*_machine_restart)(char *command) = do_machine_restart;
1706
1707/* on panic */
1708
1709static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1710
1711static 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
1717static 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}
0f024379 1723static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
99ca4e58
MH		 1724
1725static void do_panic(void)
1726{
3ab121ab 1727 lgr_info_log();
99ca4e58
MH		 1728 on_panic_trigger.action->fn(&on_panic_trigger);
1729 stop_run(&on_panic_trigger);
1730}
1731
7dd6b334
MH		 1732/* on restart */
1733
1734static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
e1202eda 1735 &stop_action};
7dd6b334
MH		 1736
1737static 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
1743static 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}
0f024379 1749static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
7dd6b334 1750
8b646bd7 1751static void __do_restart(void *ignore)
7dd6b334 1752{
fa7c0043 1753 __arch_local_irq_stosm(0x04); /* enable DAT */
7dd6b334 1754 smp_send_stop();
60a0c68d
MH		 1755#ifdef CONFIG_CRASH_DUMP
1756 crash_kexec(NULL);
1757#endif
7dd6b334
MH		 1758 on_restart_trigger.action->fn(&on_restart_trigger);
1759 stop_run(&on_restart_trigger);
1760}
1761
8b646bd7
MS		 1762void do_restart(void)
1763{
3ab121ab
MH		 1764 tracing_off();
1765 debug_locks_off();
1766 lgr_info_log();
8b646bd7
MS		 1767 smp_call_online_cpu(__do_restart, NULL);
1768}
1769
99ca4e58
MH		 1770/* on halt */
1771
1772static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1773
1774static 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
1780static 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}
0f024379 1786static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
99ca4e58
MH		 1787
1788static 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}
1794void (*_machine_halt)(void) = do_machine_halt;
1795
1796/* on power off */
1797
1798static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1799
1800static 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
1806static 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}
0f024379 1812static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
99ca4e58
MH		 1813
1814static 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}
1820void (*_machine_power_off)(void) = do_machine_power_off;
1821
0f024379
SO		 1822static 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
1831static struct attribute_group shutdown_action_attr_group = {
1832 .attrs = shutdown_action_attrs,
1833};
1834
99ca4e58
MH		 1835static void __init shutdown_triggers_init(void)
1836{
d91885be 1837 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
f62ed9e3 1838 firmware_kobj);
d91885be 1839 if (!shutdown_actions_kset)
99ca4e58 1840 goto fail;
0f024379
SO		 1841 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1842 &shutdown_action_attr_group))
7dd6b334 1843 goto fail;
99ca4e58
MH		 1844 return;
1845fail:
1846 panic("shutdown_triggers_init failed\n");
1847}
1848
1849static 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;
81088819
FM		 1856 shutdown_actions_list[i]->init_rc =
1857 shutdown_actions_list[i]->init();
ff6b8ea6 1858 }
ff6b8ea6
MH		 1859}
1860
1861static int __init s390_ipl_init(void)
1862{
69928601
MH		 1863 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1864
d5ab7a34 1865 sclp_early_get_ipl_info(&sclp_ipl_info);
69928601
MH		 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);
99ca4e58
MH		 1880 shutdown_actions_init();
1881 shutdown_triggers_init();
ff6b8ea6
MH		 1882 return 0;
1883}
1884
1885__initcall(s390_ipl_init);
15e9b586 1886
99ca4e58
MH		 1887static 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
1901static 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
1912static 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
1923static 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
1934static 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
1945static int on_panic_notify(struct notifier_block *self,
1946 unsigned long event, void *data)
1947{
1948 do_panic();
1949 return NOTIFY_OK;
1950}
1951
1952static struct notifier_block on_panic_nb = {
1953 .notifier_call = on_panic_notify,
7e9b580e 1954 .priority = INT_MIN,
99ca4e58
MH		 1955};
1956
1957void __init setup_ipl(void)
1958{
1959 ipl_info.type = get_ipl_type();
1960 switch (ipl_info.type) {
1961 case IPL_TYPE_CCW:
18e22a17 1962 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
99ca4e58 1963 ipl_info.data.ccw.dev_id.devno = ipl_devno;
99ca4e58
MH		 1964 break;
1965 case IPL_TYPE_FCP:
1966 case IPL_TYPE_FCP_DUMP:
18e22a17 1967 ipl_info.data.fcp.dev_id.ssid = 0;
99ca4e58
MH		 1968 ipl_info.data.fcp.dev_id.devno =
1969 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
99ca4e58
MH		 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:
99ca4e58
MH		 1978 /* We have no info to copy */
1979 break;
1980 }
1981 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1982}
1983
a0443fbb
HB		 1984void __init ipl_update_parameters(void)
1985{
3a95e8eb
MH		 1986 int rc;
1987
1988 rc = diag308(DIAG308_STORE, &ipl_block);
1989 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
a0443fbb
HB		 1990 diag308_set_works = 1;
1991}
1992
d543a106 1993void __init ipl_verify_parameters(void)
6fc321fd
HC		 1994{
1995 struct cio_iplinfo iplinfo;
6fc321fd
HC		 1996
1997 if (cio_get_iplinfo(&iplinfo))
1998 return;
1999
18e22a17 2000 ipl_ssid = iplinfo.ssid;
6fc321fd
HC		 2001 ipl_devno = iplinfo.devno;
2002 ipl_flags |= IPL_DEVNO_VALID;
2003 if (!iplinfo.is_qdio)
2004 return;
2005 ipl_flags |= IPL_PARMBLOCK_VALID;
6fc321fd
HC		 2006}
2007
15e9b586
HC		 2008static LIST_HEAD(rcall);
2009static DEFINE_MUTEX(rcall_mutex);
2010
2011void 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}
2017EXPORT_SYMBOL_GPL(register_reset_call);
2018
2019void unregister_reset_call(struct reset_call *reset)
2020{
2021 mutex_lock(&rcall_mutex);
2022 list_del(&reset->list);
2023 mutex_unlock(&rcall_mutex);
2024}
2025EXPORT_SYMBOL_GPL(unregister_reset_call);
2026
2027static void do_reset_calls(void)
2028{
2029 struct reset_call *reset;
2030
9dc7356e
MH		 2031 if (diag308_set_works) {
2032 diag308_reset();
2033 return;
2034 }
15e9b586
HC		 2035 list_for_each_entry(reset, &rcall, list)
2036 reset->fn();
2037}
2038
1a36a39e 2039void s390_reset_system(void)
15e9b586 2040{
c667aeac 2041 struct lowcore *lc;
15e9b586 2042
c667aeac 2043 lc = (struct lowcore *)(unsigned long) store_prefix();
a45e1414
MH		 2044
2045 /* Stack for interrupt/machine check handler */
15e9b586
HC		 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 */
e258d719 2055 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
15e9b586 2056 S390_lowcore.mcck_new_psw.addr =
fecc868a 2057 (unsigned long) s390_base_mcck_handler;
a45e1414
MH		 2058
2059 /* Set new program check handler */
e258d719 2060 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
a45e1414 2061 S390_lowcore.program_new_psw.addr =
fecc868a 2062 (unsigned long) s390_base_pgm_handler;
a45e1414 2063
15e9b586
HC		 2064 do_reset_calls();
2065}