1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * ipl/reipl/dump support for Linux on s390.
4 *
5 * Copyright IBM Corp. 2005, 2012
6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 * Volker Sameske <sameske@de.ibm.com>
8 */
9
10 #include <linux/types.h>
11 #include <linux/export.h>
12 #include <linux/init.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/kstrtox.h>
16 #include <linux/panic_notifier.h>
17 #include <linux/reboot.h>
18 #include <linux/ctype.h>
19 #include <linux/fs.h>
20 #include <linux/gfp.h>
21 #include <linux/crash_dump.h>
22 #include <linux/debug_locks.h>
23 #include <linux/vmalloc.h>
24 #include <linux/secure_boot.h>
25 #include <asm/asm-extable.h>
26 #include <asm/machine.h>
27 #include <asm/diag.h>
28 #include <asm/ipl.h>
29 #include <asm/smp.h>
30 #include <asm/setup.h>
31 #include <asm/cpcmd.h>
32 #include <asm/ebcdic.h>
33 #include <asm/sclp.h>
34 #include <asm/checksum.h>
35 #include <asm/debug.h>
36 #include <asm/abs_lowcore.h>
37 #include <asm/os_info.h>
38 #include <asm/sections.h>
39 #include <asm/boot_data.h>
40 #include "entry.h"
41
42 #define IPL_PARM_BLOCK_VERSION 0
43
44 #define IPL_UNKNOWN_STR "unknown"
45 #define IPL_CCW_STR "ccw"
46 #define IPL_ECKD_STR "eckd"
47 #define IPL_ECKD_DUMP_STR "eckd_dump"
48 #define IPL_FCP_STR "fcp"
49 #define IPL_FCP_DUMP_STR "fcp_dump"
50 #define IPL_NVME_STR "nvme"
51 #define IPL_NVME_DUMP_STR "nvme_dump"
52 #define IPL_NSS_STR "nss"
53
54 #define DUMP_CCW_STR "ccw"
55 #define DUMP_ECKD_STR "eckd"
56 #define DUMP_FCP_STR "fcp"
57 #define DUMP_NVME_STR "nvme"
58 #define DUMP_NONE_STR "none"
59
60 /*
61 * Four shutdown trigger types are supported:
62 * - panic
63 * - halt
64 * - power off
65 * - reipl
66 * - restart
67 */
68 #define ON_PANIC_STR "on_panic"
69 #define ON_HALT_STR "on_halt"
70 #define ON_POFF_STR "on_poff"
71 #define ON_REIPL_STR "on_reboot"
72 #define ON_RESTART_STR "on_restart"
73
74 struct shutdown_action;
75 struct shutdown_trigger {
76 char *name;
77 struct shutdown_action *action;
78 };
79
80 /*
81 * The following shutdown action types are supported:
82 */
83 #define SHUTDOWN_ACTION_IPL_STR "ipl"
84 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
85 #define SHUTDOWN_ACTION_DUMP_STR "dump"
86 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
87 #define SHUTDOWN_ACTION_STOP_STR "stop"
88 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
89
90 struct shutdown_action {
91 char *name;
92 void (*fn) (struct shutdown_trigger *trigger);
93 int (*init) (void);
94 int init_rc;
95 };
96
ipl_type_str(enum ipl_type type)97 static char *ipl_type_str(enum ipl_type type)
98 {
99 switch (type) {
100 case IPL_TYPE_CCW:
101 return IPL_CCW_STR;
102 case IPL_TYPE_ECKD:
103 return IPL_ECKD_STR;
104 case IPL_TYPE_ECKD_DUMP:
105 return IPL_ECKD_DUMP_STR;
106 case IPL_TYPE_FCP:
107 return IPL_FCP_STR;
108 case IPL_TYPE_FCP_DUMP:
109 return IPL_FCP_DUMP_STR;
110 case IPL_TYPE_NSS:
111 return IPL_NSS_STR;
112 case IPL_TYPE_NVME:
113 return IPL_NVME_STR;
114 case IPL_TYPE_NVME_DUMP:
115 return IPL_NVME_DUMP_STR;
116 case IPL_TYPE_UNKNOWN:
117 default:
118 return IPL_UNKNOWN_STR;
119 }
120 }
121
122 enum dump_type {
123 DUMP_TYPE_NONE = 1,
124 DUMP_TYPE_CCW = 2,
125 DUMP_TYPE_FCP = 4,
126 DUMP_TYPE_NVME = 8,
127 DUMP_TYPE_ECKD = 16,
128 };
129
dump_type_str(enum dump_type type)130 static char *dump_type_str(enum dump_type type)
131 {
132 switch (type) {
133 case DUMP_TYPE_NONE:
134 return DUMP_NONE_STR;
135 case DUMP_TYPE_CCW:
136 return DUMP_CCW_STR;
137 case DUMP_TYPE_ECKD:
138 return DUMP_ECKD_STR;
139 case DUMP_TYPE_FCP:
140 return DUMP_FCP_STR;
141 case DUMP_TYPE_NVME:
142 return DUMP_NVME_STR;
143 default:
144 return NULL;
145 }
146 }
147
148 int __bootdata_preserved(ipl_block_valid);
149 struct ipl_parameter_block __bootdata_preserved(ipl_block);
150 int __bootdata_preserved(ipl_secure_flag);
151
152 unsigned long __bootdata_preserved(ipl_cert_list_addr);
153 unsigned long __bootdata_preserved(ipl_cert_list_size);
154
155 unsigned long __bootdata(early_ipl_comp_list_addr);
156 unsigned long __bootdata(early_ipl_comp_list_size);
157
158 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
159
160 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
161 static struct ipl_parameter_block *reipl_block_fcp;
162 static struct ipl_parameter_block *reipl_block_nvme;
163 static struct ipl_parameter_block *reipl_block_ccw;
164 static struct ipl_parameter_block *reipl_block_eckd;
165 static struct ipl_parameter_block *reipl_block_nss;
166 static struct ipl_parameter_block *reipl_block_actual;
167
168 static int dump_capabilities = DUMP_TYPE_NONE;
169 static enum dump_type dump_type = DUMP_TYPE_NONE;
170 static struct ipl_parameter_block *dump_block_fcp;
171 static struct ipl_parameter_block *dump_block_nvme;
172 static struct ipl_parameter_block *dump_block_ccw;
173 static struct ipl_parameter_block *dump_block_eckd;
174
175 static struct sclp_ipl_info sclp_ipl_info;
176
177 static bool reipl_nvme_clear;
178 static bool reipl_fcp_clear;
179 static bool reipl_ccw_clear;
180 static bool reipl_eckd_clear;
181
182 static unsigned long os_info_flags;
183
__diag308(unsigned long subcode,unsigned long addr)184 static inline int __diag308(unsigned long subcode, unsigned long addr)
185 {
186 union register_pair r1;
187
188 r1.even = addr;
189 r1.odd = 0;
190 asm_inline volatile(
191 " diag %[r1],%[subcode],0x308\n"
192 "0: nopr %%r7\n"
193 EX_TABLE(0b,0b)
194 : [r1] "+&d" (r1.pair)
195 : [subcode] "d" (subcode)
196 : "cc", "memory");
197 return r1.odd;
198 }
199
diag308(unsigned long subcode,void * addr)200 int diag308(unsigned long subcode, void *addr)
201 {
202 diag_stat_inc(DIAG_STAT_X308);
203 return __diag308(subcode, addr ? virt_to_phys(addr) : 0);
204 }
205 EXPORT_SYMBOL_GPL(diag308);
206
207 /* SYSFS */
208
209 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
210 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
211 struct kobj_attribute *attr, \
212 char *page) \
213 { \
214 return sysfs_emit(page, _format, ##args); \
215 }
216
217 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
218 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
219 struct kobj_attribute *attr, \
220 const char *buf, size_t len) \
221 { \
222 unsigned long long ssid, devno; \
223 \
224 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
225 return -EINVAL; \
226 \
227 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
228 return -EINVAL; \
229 \
230 _ipl_blk.ssid = ssid; \
231 _ipl_blk.devno = devno; \
232 return len; \
233 }
234
235 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
236 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
237 _ipl_blk.ssid, _ipl_blk.devno); \
238 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
239 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
240 __ATTR(_name, 0644, \
241 sys_##_prefix##_##_name##_show, \
242 sys_##_prefix##_##_name##_store) \
243
244 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
245 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
246 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
247 __ATTR(_name, 0444, sys_##_prefix##_##_name##_show, NULL)
248
249 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
250 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
251 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
252 struct kobj_attribute *attr, \
253 const char *buf, size_t len) \
254 { \
255 unsigned long long value; \
256 if (sscanf(buf, _fmt_in, &value) != 1) \
257 return -EINVAL; \
258 _value = value; \
259 return len; \
260 } \
261 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
262 __ATTR(_name, 0644, \
263 sys_##_prefix##_##_name##_show, \
264 sys_##_prefix##_##_name##_store)
265
266 #define DEFINE_IPL_ATTR_BOOTPROG_RW(_prefix, _name, _fmt_out, _fmt_in, _hdr, _value) \
267 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
268 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
269 struct kobj_attribute *attr, \
270 const char *buf, size_t len) \
271 { \
272 unsigned long long value; \
273 if (sscanf(buf, _fmt_in, &value) != 1) \
274 return -EINVAL; \
275 (_value) = value; \
276 (_hdr).flags &= ~IPL_PL_FLAG_SBP; \
277 return len; \
278 } \
279 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
280 __ATTR(_name, 0644, \
281 sys_##_prefix##_##_name##_show, \
282 sys_##_prefix##_##_name##_store)
283
284 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
285 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
286 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
287 struct kobj_attribute *attr, \
288 const char *buf, size_t len) \
289 { \
290 if (len >= sizeof(_value)) \
291 return -E2BIG; \
292 len = strscpy(_value, buf); \
293 if ((ssize_t)len < 0) \
294 return len; \
295 strim(_value); \
296 return len; \
297 } \
298 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
299 __ATTR(_name, 0644, \
300 sys_##_prefix##_##_name##_show, \
301 sys_##_prefix##_##_name##_store)
302
303 #define IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block) \
304 static ssize_t sys_##_prefix##_scp_data_show(struct file *filp, \
305 struct kobject *kobj, \
306 const struct bin_attribute *attr, \
307 char *buf, loff_t off, \
308 size_t count) \
309 { \
310 size_t size = _ipl_block.scp_data_len; \
311 void *scp_data = _ipl_block.scp_data; \
312 \
313 return memory_read_from_buffer(buf, count, &off, \
314 scp_data, size); \
315 }
316
317 #define IPL_ATTR_SCP_DATA_STORE_FN(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len)\
318 static ssize_t sys_##_prefix##_scp_data_store(struct file *filp, \
319 struct kobject *kobj, \
320 const struct bin_attribute *attr, \
321 char *buf, loff_t off, \
322 size_t count) \
323 { \
324 size_t scpdata_len = count; \
325 size_t padding; \
326 \
327 if (off) \
328 return -EINVAL; \
329 \
330 memcpy(_ipl_block.scp_data, buf, count); \
331 if (scpdata_len % 8) { \
332 padding = 8 - (scpdata_len % 8); \
333 memset(_ipl_block.scp_data + scpdata_len, \
334 0, padding); \
335 scpdata_len += padding; \
336 } \
337 \
338 _ipl_block_hdr.len = _ipl_bp_len + scpdata_len; \
339 _ipl_block.len = _ipl_bp0_len + scpdata_len; \
340 _ipl_block.scp_data_len = scpdata_len; \
341 \
342 return count; \
343 }
344
345 #define DEFINE_IPL_ATTR_SCP_DATA_RO(_prefix, _ipl_block, _size) \
346 IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block) \
347 static const struct bin_attribute sys_##_prefix##_scp_data_attr = \
348 __BIN_ATTR(scp_data, 0444, sys_##_prefix##_scp_data_show, \
349 NULL, _size)
350
351 #define DEFINE_IPL_ATTR_SCP_DATA_RW(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len, _size)\
352 IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block) \
353 IPL_ATTR_SCP_DATA_STORE_FN(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len)\
354 static const struct bin_attribute sys_##_prefix##_scp_data_attr = \
355 __BIN_ATTR(scp_data, 0644, sys_##_prefix##_scp_data_show, \
356 sys_##_prefix##_scp_data_store, _size)
357
358 /*
359 * ipl section
360 */
361
get_ipl_type(void)362 static __init enum ipl_type get_ipl_type(void)
363 {
364 if (!ipl_block_valid)
365 return IPL_TYPE_UNKNOWN;
366
367 switch (ipl_block.pb0_hdr.pbt) {
368 case IPL_PBT_CCW:
369 return IPL_TYPE_CCW;
370 case IPL_PBT_FCP:
371 if (ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP)
372 return IPL_TYPE_FCP_DUMP;
373 else
374 return IPL_TYPE_FCP;
375 case IPL_PBT_NVME:
376 if (ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
377 return IPL_TYPE_NVME_DUMP;
378 else
379 return IPL_TYPE_NVME;
380 case IPL_PBT_ECKD:
381 if (ipl_block.eckd.opt == IPL_PB0_ECKD_OPT_DUMP)
382 return IPL_TYPE_ECKD_DUMP;
383 else
384 return IPL_TYPE_ECKD;
385 }
386 return IPL_TYPE_UNKNOWN;
387 }
388
389 struct ipl_info ipl_info;
390 EXPORT_SYMBOL_GPL(ipl_info);
391
ipl_type_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)392 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
393 char *page)
394 {
395 return sysfs_emit(page, "%s\n", ipl_type_str(ipl_info.type));
396 }
397
398 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
399
ipl_secure_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)400 static ssize_t ipl_secure_show(struct kobject *kobj,
401 struct kobj_attribute *attr, char *page)
402 {
403 return sysfs_emit(page, "%i\n", !!ipl_secure_flag);
404 }
405
406 static struct kobj_attribute sys_ipl_secure_attr =
407 __ATTR(secure, 0444, ipl_secure_show, NULL);
408
ipl_has_secure_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)409 static ssize_t ipl_has_secure_show(struct kobject *kobj,
410 struct kobj_attribute *attr, char *page)
411 {
412 return sysfs_emit(page, "%i\n", !!sclp.has_sipl);
413 }
414
415 static struct kobj_attribute sys_ipl_has_secure_attr =
416 __ATTR(has_secure, 0444, ipl_has_secure_show, NULL);
417
ipl_vm_parm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)418 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
419 struct kobj_attribute *attr, char *page)
420 {
421 char parm[DIAG308_VMPARM_SIZE + 1] = {};
422
423 if (ipl_block_valid && (ipl_block.pb0_hdr.pbt == IPL_PBT_CCW))
424 ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block);
425 return sysfs_emit(page, "%s\n", parm);
426 }
427
428 static struct kobj_attribute sys_ipl_vm_parm_attr =
429 __ATTR(parm, 0444, ipl_vm_parm_show, NULL);
430
sys_ipl_device_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)431 static ssize_t sys_ipl_device_show(struct kobject *kobj,
432 struct kobj_attribute *attr, char *page)
433 {
434 switch (ipl_info.type) {
435 case IPL_TYPE_CCW:
436 return sysfs_emit(page, "0.%x.%04x\n", ipl_block.ccw.ssid,
437 ipl_block.ccw.devno);
438 case IPL_TYPE_ECKD:
439 case IPL_TYPE_ECKD_DUMP:
440 return sysfs_emit(page, "0.%x.%04x\n", ipl_block.eckd.ssid,
441 ipl_block.eckd.devno);
442 case IPL_TYPE_FCP:
443 case IPL_TYPE_FCP_DUMP:
444 return sysfs_emit(page, "0.0.%04x\n", ipl_block.fcp.devno);
445 case IPL_TYPE_NVME:
446 case IPL_TYPE_NVME_DUMP:
447 return sysfs_emit(page, "%08ux\n", ipl_block.nvme.fid);
448 default:
449 return 0;
450 }
451 }
452
453 static struct kobj_attribute sys_ipl_device_attr =
454 __ATTR(device, 0444, sys_ipl_device_show, NULL);
455
sys_ipl_parameter_read(struct file * filp,struct kobject * kobj,const struct bin_attribute * attr,char * buf,loff_t off,size_t count)456 static ssize_t sys_ipl_parameter_read(struct file *filp, struct kobject *kobj,
457 const struct bin_attribute *attr, char *buf,
458 loff_t off, size_t count)
459 {
460 return memory_read_from_buffer(buf, count, &off, &ipl_block,
461 ipl_block.hdr.len);
462 }
463 static const struct bin_attribute sys_ipl_parameter_attr =
464 __BIN_ATTR(binary_parameter, 0444, sys_ipl_parameter_read, NULL,
465 PAGE_SIZE);
466
467 DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_fcp, ipl_block.fcp, PAGE_SIZE);
468
469 static const struct bin_attribute *const ipl_fcp_bin_attrs[] = {
470 &sys_ipl_parameter_attr,
471 &sys_ipl_fcp_scp_data_attr,
472 NULL,
473 };
474
475 DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_nvme, ipl_block.nvme, PAGE_SIZE);
476
477 static const struct bin_attribute *const ipl_nvme_bin_attrs[] = {
478 &sys_ipl_parameter_attr,
479 &sys_ipl_nvme_scp_data_attr,
480 NULL,
481 };
482
483 DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_eckd, ipl_block.eckd, PAGE_SIZE);
484
485 static const struct bin_attribute *const ipl_eckd_bin_attrs[] = {
486 &sys_ipl_parameter_attr,
487 &sys_ipl_eckd_scp_data_attr,
488 NULL,
489 };
490
491 /* FCP ipl device attributes */
492
493 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
494 (unsigned long long)ipl_block.fcp.wwpn);
495 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
496 (unsigned long long)ipl_block.fcp.lun);
497 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
498 (unsigned long long)ipl_block.fcp.bootprog);
499 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
500 (unsigned long long)ipl_block.fcp.br_lba);
501
502 /* NVMe ipl device attributes */
503 DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n",
504 (unsigned long long)ipl_block.nvme.fid);
505 DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n",
506 (unsigned long long)ipl_block.nvme.nsid);
507 DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n",
508 (unsigned long long)ipl_block.nvme.bootprog);
509 DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n",
510 (unsigned long long)ipl_block.nvme.br_lba);
511
512 /* ECKD ipl device attributes */
513 DEFINE_IPL_ATTR_RO(ipl_eckd, bootprog, "%lld\n",
514 (unsigned long long)ipl_block.eckd.bootprog);
515
516 #define IPL_ATTR_BR_CHR_SHOW_FN(_name, _ipb) \
517 static ssize_t eckd_##_name##_br_chr_show(struct kobject *kobj, \
518 struct kobj_attribute *attr, \
519 char *buf) \
520 { \
521 struct ipl_pb0_eckd *ipb = &(_ipb); \
522 \
523 if (!ipb->br_chr.cyl && \
524 !ipb->br_chr.head && \
525 !ipb->br_chr.record) \
526 return sysfs_emit(buf, "auto\n"); \
527 \
528 return sysfs_emit(buf, "0x%x,0x%x,0x%x\n", \
529 ipb->br_chr.cyl, \
530 ipb->br_chr.head, \
531 ipb->br_chr.record); \
532 }
533
534 #define IPL_ATTR_BR_CHR_STORE_FN(_name, _ipb) \
535 static ssize_t eckd_##_name##_br_chr_store(struct kobject *kobj, \
536 struct kobj_attribute *attr, \
537 const char *buf, size_t len) \
538 { \
539 struct ipl_pb0_eckd *ipb = &(_ipb); \
540 unsigned long args[3] = { 0 }; \
541 char *p, *p1, *tmp = NULL; \
542 int i, rc; \
543 \
544 if (!strncmp(buf, "auto", 4)) \
545 goto out; \
546 \
547 tmp = kstrdup(buf, GFP_KERNEL); \
548 p = tmp; \
549 for (i = 0; i < 3; i++) { \
550 p1 = strsep(&p, ", "); \
551 if (!p1) { \
552 rc = -EINVAL; \
553 goto err; \
554 } \
555 rc = kstrtoul(p1, 0, args + i); \
556 if (rc) \
557 goto err; \
558 } \
559 \
560 rc = -EINVAL; \
561 if (i != 3) \
562 goto err; \
563 \
564 if ((args[0] || args[1]) && !args[2]) \
565 goto err; \
566 \
567 if (args[0] > UINT_MAX || args[1] > 255 || args[2] > 255) \
568 goto err; \
569 \
570 out: \
571 ipb->br_chr.cyl = args[0]; \
572 ipb->br_chr.head = args[1]; \
573 ipb->br_chr.record = args[2]; \
574 rc = len; \
575 err: \
576 kfree(tmp); \
577 return rc; \
578 }
579
580 IPL_ATTR_BR_CHR_SHOW_FN(ipl, ipl_block.eckd);
581 static struct kobj_attribute sys_ipl_eckd_br_chr_attr =
582 __ATTR(br_chr, 0644, eckd_ipl_br_chr_show, NULL);
583
584 IPL_ATTR_BR_CHR_SHOW_FN(reipl, reipl_block_eckd->eckd);
585 IPL_ATTR_BR_CHR_STORE_FN(reipl, reipl_block_eckd->eckd);
586
587 static struct kobj_attribute sys_reipl_eckd_br_chr_attr =
588 __ATTR(br_chr, 0644, eckd_reipl_br_chr_show, eckd_reipl_br_chr_store);
589
ipl_ccw_loadparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)590 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
591 struct kobj_attribute *attr, char *page)
592 {
593 char loadparm[LOADPARM_LEN + 1] = {};
594
595 if (!sclp_ipl_info.is_valid)
596 return sysfs_emit(page, "#unknown#\n");
597 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
598 EBCASC(loadparm, LOADPARM_LEN);
599 strim(loadparm);
600 return sysfs_emit(page, "%s\n", loadparm);
601 }
602
603 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
604 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
605
606 static struct attribute *ipl_fcp_attrs[] = {
607 &sys_ipl_device_attr.attr,
608 &sys_ipl_fcp_wwpn_attr.attr,
609 &sys_ipl_fcp_lun_attr.attr,
610 &sys_ipl_fcp_bootprog_attr.attr,
611 &sys_ipl_fcp_br_lba_attr.attr,
612 &sys_ipl_ccw_loadparm_attr.attr,
613 NULL,
614 };
615
616 static const struct attribute_group ipl_fcp_attr_group = {
617 .attrs = ipl_fcp_attrs,
618 .bin_attrs = ipl_fcp_bin_attrs,
619 };
620
621 static struct attribute *ipl_nvme_attrs[] = {
622 &sys_ipl_nvme_fid_attr.attr,
623 &sys_ipl_nvme_nsid_attr.attr,
624 &sys_ipl_nvme_bootprog_attr.attr,
625 &sys_ipl_nvme_br_lba_attr.attr,
626 &sys_ipl_ccw_loadparm_attr.attr,
627 NULL,
628 };
629
630 static const struct attribute_group ipl_nvme_attr_group = {
631 .attrs = ipl_nvme_attrs,
632 .bin_attrs = ipl_nvme_bin_attrs,
633 };
634
635 static struct attribute *ipl_eckd_attrs[] = {
636 &sys_ipl_eckd_bootprog_attr.attr,
637 &sys_ipl_eckd_br_chr_attr.attr,
638 &sys_ipl_ccw_loadparm_attr.attr,
639 &sys_ipl_device_attr.attr,
640 NULL,
641 };
642
643 static const struct attribute_group ipl_eckd_attr_group = {
644 .attrs = ipl_eckd_attrs,
645 .bin_attrs = ipl_eckd_bin_attrs,
646 };
647
648 /* CCW ipl device attributes */
649
650 static struct attribute *ipl_ccw_attrs_vm[] = {
651 &sys_ipl_device_attr.attr,
652 &sys_ipl_ccw_loadparm_attr.attr,
653 &sys_ipl_vm_parm_attr.attr,
654 NULL,
655 };
656
657 static struct attribute *ipl_ccw_attrs_lpar[] = {
658 &sys_ipl_device_attr.attr,
659 &sys_ipl_ccw_loadparm_attr.attr,
660 NULL,
661 };
662
663 static const struct attribute_group ipl_ccw_attr_group_vm = {
664 .attrs = ipl_ccw_attrs_vm,
665 };
666
667 static const struct attribute_group ipl_ccw_attr_group_lpar = {
668 .attrs = ipl_ccw_attrs_lpar
669 };
670
671 static struct attribute *ipl_common_attrs[] = {
672 &sys_ipl_type_attr.attr,
673 &sys_ipl_secure_attr.attr,
674 &sys_ipl_has_secure_attr.attr,
675 NULL,
676 };
677
678 static const struct attribute_group ipl_common_attr_group = {
679 .attrs = ipl_common_attrs,
680 };
681
682 static struct kset *ipl_kset;
683
__ipl_run(void * unused)684 static void __ipl_run(void *unused)
685 {
686 diag308(DIAG308_LOAD_CLEAR, NULL);
687 }
688
ipl_run(struct shutdown_trigger * trigger)689 static void ipl_run(struct shutdown_trigger *trigger)
690 {
691 smp_call_ipl_cpu(__ipl_run, NULL);
692 }
693
ipl_init(void)694 static int __init ipl_init(void)
695 {
696 int rc;
697
698 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
699 if (!ipl_kset) {
700 rc = -ENOMEM;
701 goto out;
702 }
703 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_common_attr_group);
704 if (rc)
705 goto out;
706 switch (ipl_info.type) {
707 case IPL_TYPE_CCW:
708 if (machine_is_vm())
709 rc = sysfs_create_group(&ipl_kset->kobj,
710 &ipl_ccw_attr_group_vm);
711 else
712 rc = sysfs_create_group(&ipl_kset->kobj,
713 &ipl_ccw_attr_group_lpar);
714 break;
715 case IPL_TYPE_ECKD:
716 case IPL_TYPE_ECKD_DUMP:
717 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_eckd_attr_group);
718 break;
719 case IPL_TYPE_FCP:
720 case IPL_TYPE_FCP_DUMP:
721 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
722 break;
723 case IPL_TYPE_NVME:
724 case IPL_TYPE_NVME_DUMP:
725 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group);
726 break;
727 default:
728 break;
729 }
730 out:
731 if (rc)
732 panic("ipl_init failed: rc = %i\n", rc);
733
734 return 0;
735 }
736
737 static struct shutdown_action __refdata ipl_action = {
738 .name = SHUTDOWN_ACTION_IPL_STR,
739 .fn = ipl_run,
740 .init = ipl_init,
741 };
742
743 /*
744 * reipl shutdown action: Reboot Linux on shutdown.
745 */
746
747 /* VM IPL PARM attributes */
reipl_generic_vmparm_show(struct ipl_parameter_block * ipb,char * page)748 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
749 char *page)
750 {
751 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
752
753 ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
754 return sysfs_emit(page, "%s\n", vmparm);
755 }
756
reipl_generic_vmparm_store(struct ipl_parameter_block * ipb,size_t vmparm_max,const char * buf,size_t len)757 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
758 size_t vmparm_max,
759 const char *buf, size_t len)
760 {
761 int i, ip_len;
762
763 /* ignore trailing newline */
764 ip_len = len;
765 if ((len > 0) && (buf[len - 1] == '\n'))
766 ip_len--;
767
768 if (ip_len > vmparm_max)
769 return -EINVAL;
770
771 /* parm is used to store kernel options, check for common chars */
772 for (i = 0; i < ip_len; i++)
773 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
774 return -EINVAL;
775
776 memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
777 ipb->ccw.vm_parm_len = ip_len;
778 if (ip_len > 0) {
779 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
780 memcpy(ipb->ccw.vm_parm, buf, ip_len);
781 ASCEBC(ipb->ccw.vm_parm, ip_len);
782 } else {
783 ipb->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_VP;
784 }
785
786 return len;
787 }
788
789 /* NSS wrapper */
reipl_nss_vmparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)790 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
791 struct kobj_attribute *attr, char *page)
792 {
793 return reipl_generic_vmparm_show(reipl_block_nss, page);
794 }
795
reipl_nss_vmparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)796 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
797 struct kobj_attribute *attr,
798 const char *buf, size_t len)
799 {
800 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
801 }
802
803 /* CCW wrapper */
reipl_ccw_vmparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)804 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
805 struct kobj_attribute *attr, char *page)
806 {
807 return reipl_generic_vmparm_show(reipl_block_ccw, page);
808 }
809
reipl_ccw_vmparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)810 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
811 struct kobj_attribute *attr,
812 const char *buf, size_t len)
813 {
814 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
815 }
816
817 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
818 __ATTR(parm, 0644, reipl_nss_vmparm_show,
819 reipl_nss_vmparm_store);
820 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
821 __ATTR(parm, 0644, reipl_ccw_vmparm_show,
822 reipl_ccw_vmparm_store);
823
824 /* FCP reipl device attributes */
825
826 DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_fcp, reipl_block_fcp->hdr,
827 reipl_block_fcp->fcp,
828 IPL_BP_FCP_LEN, IPL_BP0_FCP_LEN,
829 DIAG308_SCPDATA_SIZE);
830
831 static const struct bin_attribute *const reipl_fcp_bin_attrs[] = {
832 &sys_reipl_fcp_scp_data_attr,
833 NULL,
834 };
835
836 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
837 reipl_block_fcp->fcp.wwpn);
838 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
839 reipl_block_fcp->fcp.lun);
840 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
841 reipl_block_fcp->fcp.br_lba);
842 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
843 reipl_block_fcp->fcp.devno);
844 DEFINE_IPL_ATTR_BOOTPROG_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
845 reipl_block_fcp->hdr,
846 reipl_block_fcp->fcp.bootprog);
847
reipl_get_ascii_loadparm(char * loadparm,struct ipl_parameter_block * ibp)848 static void reipl_get_ascii_loadparm(char *loadparm,
849 struct ipl_parameter_block *ibp)
850 {
851 memcpy(loadparm, ibp->common.loadparm, LOADPARM_LEN);
852 EBCASC(loadparm, LOADPARM_LEN);
853 loadparm[LOADPARM_LEN] = 0;
854 strim(loadparm);
855 }
856
reipl_generic_loadparm_show(struct ipl_parameter_block * ipb,char * page)857 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
858 char *page)
859 {
860 char buf[LOADPARM_LEN + 1];
861
862 reipl_get_ascii_loadparm(buf, ipb);
863 return sysfs_emit(page, "%s\n", buf);
864 }
865
reipl_generic_loadparm_store(struct ipl_parameter_block * ipb,const char * buf,size_t len)866 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
867 const char *buf, size_t len)
868 {
869 int i, lp_len;
870
871 /* ignore trailing newline */
872 lp_len = len;
873 if ((len > 0) && (buf[len - 1] == '\n'))
874 lp_len--;
875 /* loadparm can have max 8 characters and must not start with a blank */
876 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
877 return -EINVAL;
878 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
879 for (i = 0; i < lp_len; i++) {
880 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
881 (buf[i] == '.'))
882 continue;
883 return -EINVAL;
884 }
885 /* initialize loadparm with blanks */
886 memset(ipb->common.loadparm, ' ', LOADPARM_LEN);
887 /* copy and convert to ebcdic */
888 memcpy(ipb->common.loadparm, buf, lp_len);
889 ASCEBC(ipb->common.loadparm, LOADPARM_LEN);
890 ipb->common.flags |= IPL_PB0_FLAG_LOADPARM;
891 return len;
892 }
893
894 #define DEFINE_GENERIC_LOADPARM(name) \
895 static ssize_t reipl_##name##_loadparm_show(struct kobject *kobj, \
896 struct kobj_attribute *attr, char *page) \
897 { \
898 return reipl_generic_loadparm_show(reipl_block_##name, page); \
899 } \
900 static ssize_t reipl_##name##_loadparm_store(struct kobject *kobj, \
901 struct kobj_attribute *attr, \
902 const char *buf, size_t len) \
903 { \
904 return reipl_generic_loadparm_store(reipl_block_##name, buf, len); \
905 } \
906 static struct kobj_attribute sys_reipl_##name##_loadparm_attr = \
907 __ATTR(loadparm, 0644, reipl_##name##_loadparm_show, \
908 reipl_##name##_loadparm_store)
909
910 DEFINE_GENERIC_LOADPARM(fcp);
911 DEFINE_GENERIC_LOADPARM(nvme);
912 DEFINE_GENERIC_LOADPARM(ccw);
913 DEFINE_GENERIC_LOADPARM(nss);
914 DEFINE_GENERIC_LOADPARM(eckd);
915
reipl_fcp_clear_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)916 static ssize_t reipl_fcp_clear_show(struct kobject *kobj,
917 struct kobj_attribute *attr, char *page)
918 {
919 return sysfs_emit(page, "%u\n", reipl_fcp_clear);
920 }
921
reipl_fcp_clear_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)922 static ssize_t reipl_fcp_clear_store(struct kobject *kobj,
923 struct kobj_attribute *attr,
924 const char *buf, size_t len)
925 {
926 if (kstrtobool(buf, &reipl_fcp_clear) < 0)
927 return -EINVAL;
928 return len;
929 }
930
931 static struct attribute *reipl_fcp_attrs[] = {
932 &sys_reipl_fcp_device_attr.attr,
933 &sys_reipl_fcp_wwpn_attr.attr,
934 &sys_reipl_fcp_lun_attr.attr,
935 &sys_reipl_fcp_bootprog_attr.attr,
936 &sys_reipl_fcp_br_lba_attr.attr,
937 &sys_reipl_fcp_loadparm_attr.attr,
938 NULL,
939 };
940
941 static const struct attribute_group reipl_fcp_attr_group = {
942 .attrs = reipl_fcp_attrs,
943 .bin_attrs = reipl_fcp_bin_attrs,
944 };
945
946 static struct kobj_attribute sys_reipl_fcp_clear_attr =
947 __ATTR(clear, 0644, reipl_fcp_clear_show, reipl_fcp_clear_store);
948
949 /* NVME reipl device attributes */
950
951 DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_nvme, reipl_block_nvme->hdr,
952 reipl_block_nvme->nvme,
953 IPL_BP_NVME_LEN, IPL_BP0_NVME_LEN,
954 DIAG308_SCPDATA_SIZE);
955
956 static const struct bin_attribute *const reipl_nvme_bin_attrs[] = {
957 &sys_reipl_nvme_scp_data_attr,
958 NULL,
959 };
960
961 DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n",
962 reipl_block_nvme->nvme.fid);
963 DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n",
964 reipl_block_nvme->nvme.nsid);
965 DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n",
966 reipl_block_nvme->nvme.br_lba);
967 DEFINE_IPL_ATTR_BOOTPROG_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n",
968 reipl_block_nvme->hdr,
969 reipl_block_nvme->nvme.bootprog);
970
971 static struct attribute *reipl_nvme_attrs[] = {
972 &sys_reipl_nvme_fid_attr.attr,
973 &sys_reipl_nvme_nsid_attr.attr,
974 &sys_reipl_nvme_bootprog_attr.attr,
975 &sys_reipl_nvme_br_lba_attr.attr,
976 &sys_reipl_nvme_loadparm_attr.attr,
977 NULL,
978 };
979
980 static const struct attribute_group reipl_nvme_attr_group = {
981 .attrs = reipl_nvme_attrs,
982 .bin_attrs = reipl_nvme_bin_attrs
983 };
984
reipl_nvme_clear_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)985 static ssize_t reipl_nvme_clear_show(struct kobject *kobj,
986 struct kobj_attribute *attr, char *page)
987 {
988 return sysfs_emit(page, "%u\n", reipl_nvme_clear);
989 }
990
reipl_nvme_clear_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)991 static ssize_t reipl_nvme_clear_store(struct kobject *kobj,
992 struct kobj_attribute *attr,
993 const char *buf, size_t len)
994 {
995 if (kstrtobool(buf, &reipl_nvme_clear) < 0)
996 return -EINVAL;
997 return len;
998 }
999
1000 static struct kobj_attribute sys_reipl_nvme_clear_attr =
1001 __ATTR(clear, 0644, reipl_nvme_clear_show, reipl_nvme_clear_store);
1002
1003 /* CCW reipl device attributes */
1004 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw);
1005
reipl_ccw_clear_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1006 static ssize_t reipl_ccw_clear_show(struct kobject *kobj,
1007 struct kobj_attribute *attr, char *page)
1008 {
1009 return sysfs_emit(page, "%u\n", reipl_ccw_clear);
1010 }
1011
reipl_ccw_clear_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1012 static ssize_t reipl_ccw_clear_store(struct kobject *kobj,
1013 struct kobj_attribute *attr,
1014 const char *buf, size_t len)
1015 {
1016 if (kstrtobool(buf, &reipl_ccw_clear) < 0)
1017 return -EINVAL;
1018 return len;
1019 }
1020
1021 static struct kobj_attribute sys_reipl_ccw_clear_attr =
1022 __ATTR(clear, 0644, reipl_ccw_clear_show, reipl_ccw_clear_store);
1023
1024 static struct attribute *reipl_ccw_attrs_vm[] = {
1025 &sys_reipl_ccw_device_attr.attr,
1026 &sys_reipl_ccw_loadparm_attr.attr,
1027 &sys_reipl_ccw_vmparm_attr.attr,
1028 &sys_reipl_ccw_clear_attr.attr,
1029 NULL,
1030 };
1031
1032 static struct attribute *reipl_ccw_attrs_lpar[] = {
1033 &sys_reipl_ccw_device_attr.attr,
1034 &sys_reipl_ccw_loadparm_attr.attr,
1035 &sys_reipl_ccw_clear_attr.attr,
1036 NULL,
1037 };
1038
1039 static struct attribute_group reipl_ccw_attr_group_vm = {
1040 .name = IPL_CCW_STR,
1041 .attrs = reipl_ccw_attrs_vm,
1042 };
1043
1044 static struct attribute_group reipl_ccw_attr_group_lpar = {
1045 .name = IPL_CCW_STR,
1046 .attrs = reipl_ccw_attrs_lpar,
1047 };
1048
1049 /* ECKD reipl device attributes */
1050
1051 DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_eckd, reipl_block_eckd->hdr,
1052 reipl_block_eckd->eckd,
1053 IPL_BP_ECKD_LEN, IPL_BP0_ECKD_LEN,
1054 DIAG308_SCPDATA_SIZE);
1055
1056 static const struct bin_attribute *const reipl_eckd_bin_attrs[] = {
1057 &sys_reipl_eckd_scp_data_attr,
1058 NULL,
1059 };
1060
1061 DEFINE_IPL_CCW_ATTR_RW(reipl_eckd, device, reipl_block_eckd->eckd);
1062 DEFINE_IPL_ATTR_BOOTPROG_RW(reipl_eckd, bootprog, "%lld\n", "%lld\n",
1063 reipl_block_eckd->hdr,
1064 reipl_block_eckd->eckd.bootprog);
1065
1066 static struct attribute *reipl_eckd_attrs[] = {
1067 &sys_reipl_eckd_device_attr.attr,
1068 &sys_reipl_eckd_bootprog_attr.attr,
1069 &sys_reipl_eckd_br_chr_attr.attr,
1070 &sys_reipl_eckd_loadparm_attr.attr,
1071 NULL,
1072 };
1073
1074 static const struct attribute_group reipl_eckd_attr_group = {
1075 .attrs = reipl_eckd_attrs,
1076 .bin_attrs = reipl_eckd_bin_attrs
1077 };
1078
reipl_eckd_clear_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1079 static ssize_t reipl_eckd_clear_show(struct kobject *kobj,
1080 struct kobj_attribute *attr, char *page)
1081 {
1082 return sysfs_emit(page, "%u\n", reipl_eckd_clear);
1083 }
1084
reipl_eckd_clear_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1085 static ssize_t reipl_eckd_clear_store(struct kobject *kobj,
1086 struct kobj_attribute *attr,
1087 const char *buf, size_t len)
1088 {
1089 if (kstrtobool(buf, &reipl_eckd_clear) < 0)
1090 return -EINVAL;
1091 return len;
1092 }
1093
1094 static struct kobj_attribute sys_reipl_eckd_clear_attr =
1095 __ATTR(clear, 0644, reipl_eckd_clear_show, reipl_eckd_clear_store);
1096
1097 /* NSS reipl device attributes */
reipl_get_ascii_nss_name(char * dst,struct ipl_parameter_block * ipb)1098 static void reipl_get_ascii_nss_name(char *dst,
1099 struct ipl_parameter_block *ipb)
1100 {
1101 memcpy(dst, ipb->ccw.nss_name, NSS_NAME_SIZE);
1102 EBCASC(dst, NSS_NAME_SIZE);
1103 dst[NSS_NAME_SIZE] = 0;
1104 }
1105
reipl_nss_name_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1106 static ssize_t reipl_nss_name_show(struct kobject *kobj,
1107 struct kobj_attribute *attr, char *page)
1108 {
1109 char nss_name[NSS_NAME_SIZE + 1] = {};
1110
1111 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
1112 return sysfs_emit(page, "%s\n", nss_name);
1113 }
1114
reipl_nss_name_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1115 static ssize_t reipl_nss_name_store(struct kobject *kobj,
1116 struct kobj_attribute *attr,
1117 const char *buf, size_t len)
1118 {
1119 int nss_len;
1120
1121 /* ignore trailing newline */
1122 nss_len = len;
1123 if ((len > 0) && (buf[len - 1] == '\n'))
1124 nss_len--;
1125
1126 if (nss_len > NSS_NAME_SIZE)
1127 return -EINVAL;
1128
1129 memset(reipl_block_nss->ccw.nss_name, 0x40, NSS_NAME_SIZE);
1130 if (nss_len > 0) {
1131 reipl_block_nss->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_NSS;
1132 memcpy(reipl_block_nss->ccw.nss_name, buf, nss_len);
1133 ASCEBC(reipl_block_nss->ccw.nss_name, nss_len);
1134 EBC_TOUPPER(reipl_block_nss->ccw.nss_name, nss_len);
1135 } else {
1136 reipl_block_nss->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_NSS;
1137 }
1138
1139 return len;
1140 }
1141
1142 static struct kobj_attribute sys_reipl_nss_name_attr =
1143 __ATTR(name, 0644, reipl_nss_name_show,
1144 reipl_nss_name_store);
1145
1146 static struct attribute *reipl_nss_attrs[] = {
1147 &sys_reipl_nss_name_attr.attr,
1148 &sys_reipl_nss_loadparm_attr.attr,
1149 &sys_reipl_nss_vmparm_attr.attr,
1150 NULL,
1151 };
1152
1153 static struct attribute_group reipl_nss_attr_group = {
1154 .name = IPL_NSS_STR,
1155 .attrs = reipl_nss_attrs,
1156 };
1157
set_os_info_reipl_block(void)1158 void set_os_info_reipl_block(void)
1159 {
1160 os_info_entry_add_data(OS_INFO_REIPL_BLOCK, reipl_block_actual,
1161 reipl_block_actual->hdr.len);
1162 }
1163
1164 /* reipl type */
1165
reipl_set_type(enum ipl_type type)1166 static int reipl_set_type(enum ipl_type type)
1167 {
1168 if (!(reipl_capabilities & type))
1169 return -EINVAL;
1170
1171 switch(type) {
1172 case IPL_TYPE_CCW:
1173 reipl_block_actual = reipl_block_ccw;
1174 break;
1175 case IPL_TYPE_ECKD:
1176 reipl_block_actual = reipl_block_eckd;
1177 break;
1178 case IPL_TYPE_FCP:
1179 reipl_block_actual = reipl_block_fcp;
1180 break;
1181 case IPL_TYPE_NVME:
1182 reipl_block_actual = reipl_block_nvme;
1183 break;
1184 case IPL_TYPE_NSS:
1185 reipl_block_actual = reipl_block_nss;
1186 break;
1187 default:
1188 break;
1189 }
1190 reipl_type = type;
1191 return 0;
1192 }
1193
reipl_type_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1194 static ssize_t reipl_type_show(struct kobject *kobj,
1195 struct kobj_attribute *attr, char *page)
1196 {
1197 return sysfs_emit(page, "%s\n", ipl_type_str(reipl_type));
1198 }
1199
reipl_type_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1200 static ssize_t reipl_type_store(struct kobject *kobj,
1201 struct kobj_attribute *attr,
1202 const char *buf, size_t len)
1203 {
1204 int rc = -EINVAL;
1205
1206 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1207 rc = reipl_set_type(IPL_TYPE_CCW);
1208 else if (strncmp(buf, IPL_ECKD_STR, strlen(IPL_ECKD_STR)) == 0)
1209 rc = reipl_set_type(IPL_TYPE_ECKD);
1210 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1211 rc = reipl_set_type(IPL_TYPE_FCP);
1212 else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0)
1213 rc = reipl_set_type(IPL_TYPE_NVME);
1214 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1215 rc = reipl_set_type(IPL_TYPE_NSS);
1216 return (rc != 0) ? rc : len;
1217 }
1218
1219 static struct kobj_attribute reipl_type_attr =
1220 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1221
1222 static struct kset *reipl_kset;
1223 static struct kset *reipl_fcp_kset;
1224 static struct kset *reipl_nvme_kset;
1225 static struct kset *reipl_eckd_kset;
1226
__reipl_run(void * unused)1227 static void __reipl_run(void *unused)
1228 {
1229 switch (reipl_type) {
1230 case IPL_TYPE_CCW:
1231 diag308(DIAG308_SET, reipl_block_ccw);
1232 if (reipl_ccw_clear)
1233 diag308(DIAG308_LOAD_CLEAR, NULL);
1234 else
1235 diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
1236 break;
1237 case IPL_TYPE_ECKD:
1238 diag308(DIAG308_SET, reipl_block_eckd);
1239 if (reipl_eckd_clear)
1240 diag308(DIAG308_LOAD_CLEAR, NULL);
1241 else
1242 diag308(DIAG308_LOAD_NORMAL, NULL);
1243 break;
1244 case IPL_TYPE_FCP:
1245 diag308(DIAG308_SET, reipl_block_fcp);
1246 if (reipl_fcp_clear)
1247 diag308(DIAG308_LOAD_CLEAR, NULL);
1248 else
1249 diag308(DIAG308_LOAD_NORMAL, NULL);
1250 break;
1251 case IPL_TYPE_NVME:
1252 diag308(DIAG308_SET, reipl_block_nvme);
1253 if (reipl_nvme_clear)
1254 diag308(DIAG308_LOAD_CLEAR, NULL);
1255 else
1256 diag308(DIAG308_LOAD_NORMAL, NULL);
1257 break;
1258 case IPL_TYPE_NSS:
1259 diag308(DIAG308_SET, reipl_block_nss);
1260 diag308(DIAG308_LOAD_CLEAR, NULL);
1261 break;
1262 case IPL_TYPE_UNKNOWN:
1263 diag308(DIAG308_LOAD_CLEAR, NULL);
1264 break;
1265 case IPL_TYPE_FCP_DUMP:
1266 case IPL_TYPE_NVME_DUMP:
1267 case IPL_TYPE_ECKD_DUMP:
1268 break;
1269 }
1270 disabled_wait();
1271 }
1272
reipl_run(struct shutdown_trigger * trigger)1273 static void reipl_run(struct shutdown_trigger *trigger)
1274 {
1275 smp_call_ipl_cpu(__reipl_run, NULL);
1276 }
1277
reipl_block_ccw_init(struct ipl_parameter_block * ipb)1278 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1279 {
1280 ipb->hdr.len = IPL_BP_CCW_LEN;
1281 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1282 ipb->pb0_hdr.len = IPL_BP0_CCW_LEN;
1283 ipb->pb0_hdr.pbt = IPL_PBT_CCW;
1284 }
1285
reipl_block_ccw_fill_parms(struct ipl_parameter_block * ipb)1286 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1287 {
1288 /* LOADPARM */
1289 /* check if read scp info worked and set loadparm */
1290 if (sclp_ipl_info.is_valid)
1291 memcpy(ipb->ccw.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1292 else
1293 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1294 memset(ipb->ccw.loadparm, 0x40, LOADPARM_LEN);
1295 ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM;
1296
1297 /* VM PARM */
1298 if (machine_is_vm() && ipl_block_valid &&
1299 (ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) {
1300
1301 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
1302 ipb->ccw.vm_parm_len = ipl_block.ccw.vm_parm_len;
1303 memcpy(ipb->ccw.vm_parm,
1304 ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1305 }
1306 }
1307
reipl_nss_init(void)1308 static int __init reipl_nss_init(void)
1309 {
1310 int rc;
1311
1312 if (!machine_is_vm())
1313 return 0;
1314
1315 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1316 if (!reipl_block_nss)
1317 return -ENOMEM;
1318
1319 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1320 if (rc)
1321 return rc;
1322
1323 reipl_block_ccw_init(reipl_block_nss);
1324 reipl_capabilities |= IPL_TYPE_NSS;
1325 return 0;
1326 }
1327
reipl_ccw_init(void)1328 static int __init reipl_ccw_init(void)
1329 {
1330 int rc;
1331
1332 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1333 if (!reipl_block_ccw)
1334 return -ENOMEM;
1335
1336 rc = sysfs_create_group(&reipl_kset->kobj,
1337 machine_is_vm() ? &reipl_ccw_attr_group_vm
1338 : &reipl_ccw_attr_group_lpar);
1339 if (rc)
1340 return rc;
1341
1342 reipl_block_ccw_init(reipl_block_ccw);
1343 if (ipl_info.type == IPL_TYPE_CCW) {
1344 reipl_block_ccw->ccw.ssid = ipl_block.ccw.ssid;
1345 reipl_block_ccw->ccw.devno = ipl_block.ccw.devno;
1346 reipl_block_ccw_fill_parms(reipl_block_ccw);
1347 }
1348
1349 reipl_capabilities |= IPL_TYPE_CCW;
1350 return 0;
1351 }
1352
reipl_fcp_init(void)1353 static int __init reipl_fcp_init(void)
1354 {
1355 int rc;
1356
1357 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1358 if (!reipl_block_fcp)
1359 return -ENOMEM;
1360
1361 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1362 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1363 &reipl_kset->kobj);
1364 if (!reipl_fcp_kset) {
1365 free_page((unsigned long) reipl_block_fcp);
1366 return -ENOMEM;
1367 }
1368
1369 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1370 if (rc)
1371 goto out1;
1372
1373 if (test_facility(141)) {
1374 rc = sysfs_create_file(&reipl_fcp_kset->kobj,
1375 &sys_reipl_fcp_clear_attr.attr);
1376 if (rc)
1377 goto out2;
1378 } else {
1379 reipl_fcp_clear = true;
1380 }
1381
1382 if (ipl_info.type == IPL_TYPE_FCP) {
1383 memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
1384 /*
1385 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1386 * is invalid in the SCSI IPL parameter block, so take it
1387 * always from sclp_ipl_info.
1388 */
1389 memcpy(reipl_block_fcp->fcp.loadparm, sclp_ipl_info.loadparm,
1390 LOADPARM_LEN);
1391 } else {
1392 reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1393 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1394 reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1395 reipl_block_fcp->fcp.pbt = IPL_PBT_FCP;
1396 reipl_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_IPL;
1397 }
1398 reipl_capabilities |= IPL_TYPE_FCP;
1399 return 0;
1400
1401 out2:
1402 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1403 out1:
1404 kset_unregister(reipl_fcp_kset);
1405 free_page((unsigned long) reipl_block_fcp);
1406 return rc;
1407 }
1408
reipl_nvme_init(void)1409 static int __init reipl_nvme_init(void)
1410 {
1411 int rc;
1412
1413 reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
1414 if (!reipl_block_nvme)
1415 return -ENOMEM;
1416
1417 /* sysfs: create kset for mixing attr group and bin attrs */
1418 reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL,
1419 &reipl_kset->kobj);
1420 if (!reipl_nvme_kset) {
1421 free_page((unsigned long) reipl_block_nvme);
1422 return -ENOMEM;
1423 }
1424
1425 rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
1426 if (rc)
1427 goto out1;
1428
1429 if (test_facility(141)) {
1430 rc = sysfs_create_file(&reipl_nvme_kset->kobj,
1431 &sys_reipl_nvme_clear_attr.attr);
1432 if (rc)
1433 goto out2;
1434 } else {
1435 reipl_nvme_clear = true;
1436 }
1437
1438 if (ipl_info.type == IPL_TYPE_NVME) {
1439 memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block));
1440 /*
1441 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1442 * is invalid in the IPL parameter block, so take it
1443 * always from sclp_ipl_info.
1444 */
1445 memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm,
1446 LOADPARM_LEN);
1447 } else {
1448 reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN;
1449 reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
1450 reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN;
1451 reipl_block_nvme->nvme.pbt = IPL_PBT_NVME;
1452 reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL;
1453 }
1454 reipl_capabilities |= IPL_TYPE_NVME;
1455 return 0;
1456
1457 out2:
1458 sysfs_remove_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
1459 out1:
1460 kset_unregister(reipl_nvme_kset);
1461 free_page((unsigned long) reipl_block_nvme);
1462 return rc;
1463 }
1464
reipl_eckd_init(void)1465 static int __init reipl_eckd_init(void)
1466 {
1467 int rc;
1468
1469 if (!sclp.has_sipl_eckd)
1470 return 0;
1471
1472 reipl_block_eckd = (void *)get_zeroed_page(GFP_KERNEL);
1473 if (!reipl_block_eckd)
1474 return -ENOMEM;
1475
1476 /* sysfs: create kset for mixing attr group and bin attrs */
1477 reipl_eckd_kset = kset_create_and_add(IPL_ECKD_STR, NULL,
1478 &reipl_kset->kobj);
1479 if (!reipl_eckd_kset) {
1480 free_page((unsigned long)reipl_block_eckd);
1481 return -ENOMEM;
1482 }
1483
1484 rc = sysfs_create_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group);
1485 if (rc)
1486 goto out1;
1487
1488 if (test_facility(141)) {
1489 rc = sysfs_create_file(&reipl_eckd_kset->kobj,
1490 &sys_reipl_eckd_clear_attr.attr);
1491 if (rc)
1492 goto out2;
1493 } else {
1494 reipl_eckd_clear = true;
1495 }
1496
1497 if (ipl_info.type == IPL_TYPE_ECKD) {
1498 memcpy(reipl_block_eckd, &ipl_block, sizeof(ipl_block));
1499 } else {
1500 reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN;
1501 reipl_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION;
1502 reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN;
1503 reipl_block_eckd->eckd.pbt = IPL_PBT_ECKD;
1504 reipl_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_IPL;
1505 }
1506 reipl_capabilities |= IPL_TYPE_ECKD;
1507 return 0;
1508
1509 out2:
1510 sysfs_remove_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group);
1511 out1:
1512 kset_unregister(reipl_eckd_kset);
1513 free_page((unsigned long)reipl_block_eckd);
1514 return rc;
1515 }
1516
reipl_type_init(void)1517 static int __init reipl_type_init(void)
1518 {
1519 enum ipl_type reipl_type = ipl_info.type;
1520 struct ipl_parameter_block *reipl_block;
1521 unsigned long size;
1522
1523 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1524 if (!reipl_block)
1525 goto out;
1526 /*
1527 * If we have an OS info reipl block, this will be used
1528 */
1529 if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) {
1530 memcpy(reipl_block_fcp, reipl_block, size);
1531 reipl_type = IPL_TYPE_FCP;
1532 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) {
1533 memcpy(reipl_block_nvme, reipl_block, size);
1534 reipl_type = IPL_TYPE_NVME;
1535 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) {
1536 memcpy(reipl_block_ccw, reipl_block, size);
1537 reipl_type = IPL_TYPE_CCW;
1538 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_ECKD) {
1539 memcpy(reipl_block_eckd, reipl_block, size);
1540 reipl_type = IPL_TYPE_ECKD;
1541 }
1542 out:
1543 return reipl_set_type(reipl_type);
1544 }
1545
reipl_init(void)1546 static int __init reipl_init(void)
1547 {
1548 int rc;
1549
1550 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1551 if (!reipl_kset)
1552 return -ENOMEM;
1553 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1554 if (rc) {
1555 kset_unregister(reipl_kset);
1556 return rc;
1557 }
1558 rc = reipl_ccw_init();
1559 if (rc)
1560 return rc;
1561 rc = reipl_eckd_init();
1562 if (rc)
1563 return rc;
1564 rc = reipl_fcp_init();
1565 if (rc)
1566 return rc;
1567 rc = reipl_nvme_init();
1568 if (rc)
1569 return rc;
1570 rc = reipl_nss_init();
1571 if (rc)
1572 return rc;
1573 return reipl_type_init();
1574 }
1575
1576 static struct shutdown_action __refdata reipl_action = {
1577 .name = SHUTDOWN_ACTION_REIPL_STR,
1578 .fn = reipl_run,
1579 .init = reipl_init,
1580 };
1581
1582 /*
1583 * dump shutdown action: Dump Linux on shutdown.
1584 */
1585
1586 /* FCP dump device attributes */
1587
1588 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1589 dump_block_fcp->fcp.wwpn);
1590 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1591 dump_block_fcp->fcp.lun);
1592 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1593 dump_block_fcp->fcp.br_lba);
1594 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1595 dump_block_fcp->fcp.devno);
1596 DEFINE_IPL_ATTR_BOOTPROG_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1597 dump_block_fcp->hdr,
1598 dump_block_fcp->fcp.bootprog);
1599
1600 DEFINE_IPL_ATTR_SCP_DATA_RW(dump_fcp, dump_block_fcp->hdr,
1601 dump_block_fcp->fcp,
1602 IPL_BP_FCP_LEN, IPL_BP0_FCP_LEN,
1603 DIAG308_SCPDATA_SIZE);
1604
1605 static struct attribute *dump_fcp_attrs[] = {
1606 &sys_dump_fcp_device_attr.attr,
1607 &sys_dump_fcp_wwpn_attr.attr,
1608 &sys_dump_fcp_lun_attr.attr,
1609 &sys_dump_fcp_bootprog_attr.attr,
1610 &sys_dump_fcp_br_lba_attr.attr,
1611 NULL,
1612 };
1613
1614 static const struct bin_attribute *const dump_fcp_bin_attrs[] = {
1615 &sys_dump_fcp_scp_data_attr,
1616 NULL,
1617 };
1618
1619 static const struct attribute_group dump_fcp_attr_group = {
1620 .name = IPL_FCP_STR,
1621 .attrs = dump_fcp_attrs,
1622 .bin_attrs = dump_fcp_bin_attrs,
1623 };
1624
1625 /* NVME dump device attributes */
1626 DEFINE_IPL_ATTR_RW(dump_nvme, fid, "0x%08llx\n", "%llx\n",
1627 dump_block_nvme->nvme.fid);
1628 DEFINE_IPL_ATTR_RW(dump_nvme, nsid, "0x%08llx\n", "%llx\n",
1629 dump_block_nvme->nvme.nsid);
1630 DEFINE_IPL_ATTR_RW(dump_nvme, br_lba, "%lld\n", "%llx\n",
1631 dump_block_nvme->nvme.br_lba);
1632 DEFINE_IPL_ATTR_BOOTPROG_RW(dump_nvme, bootprog, "%lld\n", "%llx\n",
1633 dump_block_nvme->hdr,
1634 dump_block_nvme->nvme.bootprog);
1635
1636 DEFINE_IPL_ATTR_SCP_DATA_RW(dump_nvme, dump_block_nvme->hdr,
1637 dump_block_nvme->nvme,
1638 IPL_BP_NVME_LEN, IPL_BP0_NVME_LEN,
1639 DIAG308_SCPDATA_SIZE);
1640
1641 static struct attribute *dump_nvme_attrs[] = {
1642 &sys_dump_nvme_fid_attr.attr,
1643 &sys_dump_nvme_nsid_attr.attr,
1644 &sys_dump_nvme_bootprog_attr.attr,
1645 &sys_dump_nvme_br_lba_attr.attr,
1646 NULL,
1647 };
1648
1649 static const struct bin_attribute *const dump_nvme_bin_attrs[] = {
1650 &sys_dump_nvme_scp_data_attr,
1651 NULL,
1652 };
1653
1654 static const struct attribute_group dump_nvme_attr_group = {
1655 .name = IPL_NVME_STR,
1656 .attrs = dump_nvme_attrs,
1657 .bin_attrs = dump_nvme_bin_attrs,
1658 };
1659
1660 /* ECKD dump device attributes */
1661 DEFINE_IPL_CCW_ATTR_RW(dump_eckd, device, dump_block_eckd->eckd);
1662 DEFINE_IPL_ATTR_BOOTPROG_RW(dump_eckd, bootprog, "%lld\n", "%llx\n",
1663 dump_block_eckd->hdr,
1664 dump_block_eckd->eckd.bootprog);
1665
1666 IPL_ATTR_BR_CHR_SHOW_FN(dump, dump_block_eckd->eckd);
1667 IPL_ATTR_BR_CHR_STORE_FN(dump, dump_block_eckd->eckd);
1668
1669 static struct kobj_attribute sys_dump_eckd_br_chr_attr =
1670 __ATTR(br_chr, 0644, eckd_dump_br_chr_show, eckd_dump_br_chr_store);
1671
1672 DEFINE_IPL_ATTR_SCP_DATA_RW(dump_eckd, dump_block_eckd->hdr,
1673 dump_block_eckd->eckd,
1674 IPL_BP_ECKD_LEN, IPL_BP0_ECKD_LEN,
1675 DIAG308_SCPDATA_SIZE);
1676
1677 static struct attribute *dump_eckd_attrs[] = {
1678 &sys_dump_eckd_device_attr.attr,
1679 &sys_dump_eckd_bootprog_attr.attr,
1680 &sys_dump_eckd_br_chr_attr.attr,
1681 NULL,
1682 };
1683
1684 static const struct bin_attribute *const dump_eckd_bin_attrs[] = {
1685 &sys_dump_eckd_scp_data_attr,
1686 NULL,
1687 };
1688
1689 static const struct attribute_group dump_eckd_attr_group = {
1690 .name = IPL_ECKD_STR,
1691 .attrs = dump_eckd_attrs,
1692 .bin_attrs = dump_eckd_bin_attrs,
1693 };
1694
1695 /* CCW dump device attributes */
1696 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw);
1697
1698 static struct attribute *dump_ccw_attrs[] = {
1699 &sys_dump_ccw_device_attr.attr,
1700 NULL,
1701 };
1702
1703 static struct attribute_group dump_ccw_attr_group = {
1704 .name = IPL_CCW_STR,
1705 .attrs = dump_ccw_attrs,
1706 };
1707
1708 /* dump type */
1709
dump_set_type(enum dump_type type)1710 static int dump_set_type(enum dump_type type)
1711 {
1712 if (!(dump_capabilities & type))
1713 return -EINVAL;
1714 dump_type = type;
1715 return 0;
1716 }
1717
dump_type_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1718 static ssize_t dump_type_show(struct kobject *kobj,
1719 struct kobj_attribute *attr, char *page)
1720 {
1721 return sysfs_emit(page, "%s\n", dump_type_str(dump_type));
1722 }
1723
dump_type_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1724 static ssize_t dump_type_store(struct kobject *kobj,
1725 struct kobj_attribute *attr,
1726 const char *buf, size_t len)
1727 {
1728 int rc = -EINVAL;
1729
1730 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1731 rc = dump_set_type(DUMP_TYPE_NONE);
1732 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1733 rc = dump_set_type(DUMP_TYPE_CCW);
1734 else if (strncmp(buf, DUMP_ECKD_STR, strlen(DUMP_ECKD_STR)) == 0)
1735 rc = dump_set_type(DUMP_TYPE_ECKD);
1736 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1737 rc = dump_set_type(DUMP_TYPE_FCP);
1738 else if (strncmp(buf, DUMP_NVME_STR, strlen(DUMP_NVME_STR)) == 0)
1739 rc = dump_set_type(DUMP_TYPE_NVME);
1740 return (rc != 0) ? rc : len;
1741 }
1742
1743 static struct kobj_attribute dump_type_attr =
1744 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1745
dump_area_size_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1746 static ssize_t dump_area_size_show(struct kobject *kobj,
1747 struct kobj_attribute *attr, char *page)
1748 {
1749 return sysfs_emit(page, "%lu\n", sclp.hsa_size);
1750 }
1751
1752 static struct kobj_attribute dump_area_size_attr = __ATTR_RO(dump_area_size);
1753
1754 static struct attribute *dump_attrs[] = {
1755 &dump_type_attr.attr,
1756 &dump_area_size_attr.attr,
1757 NULL,
1758 };
1759
1760 static struct attribute_group dump_attr_group = {
1761 .attrs = dump_attrs,
1762 };
1763
1764 static struct kset *dump_kset;
1765
diag308_dump(void * dump_block)1766 static void diag308_dump(void *dump_block)
1767 {
1768 diag308(DIAG308_SET, dump_block);
1769 while (1) {
1770 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1771 break;
1772 udelay(USEC_PER_SEC);
1773 }
1774 }
1775
__dump_run(void * unused)1776 static void __dump_run(void *unused)
1777 {
1778 switch (dump_type) {
1779 case DUMP_TYPE_CCW:
1780 diag308_dump(dump_block_ccw);
1781 break;
1782 case DUMP_TYPE_ECKD:
1783 diag308_dump(dump_block_eckd);
1784 break;
1785 case DUMP_TYPE_FCP:
1786 diag308_dump(dump_block_fcp);
1787 break;
1788 case DUMP_TYPE_NVME:
1789 diag308_dump(dump_block_nvme);
1790 break;
1791 default:
1792 break;
1793 }
1794 }
1795
dump_run(struct shutdown_trigger * trigger)1796 static void dump_run(struct shutdown_trigger *trigger)
1797 {
1798 if (dump_type == DUMP_TYPE_NONE)
1799 return;
1800 smp_send_stop();
1801 smp_call_ipl_cpu(__dump_run, NULL);
1802 }
1803
dump_ccw_init(void)1804 static int __init dump_ccw_init(void)
1805 {
1806 int rc;
1807
1808 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1809 if (!dump_block_ccw)
1810 return -ENOMEM;
1811 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1812 if (rc) {
1813 free_page((unsigned long)dump_block_ccw);
1814 return rc;
1815 }
1816 dump_block_ccw->hdr.len = IPL_BP_CCW_LEN;
1817 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1818 dump_block_ccw->ccw.len = IPL_BP0_CCW_LEN;
1819 dump_block_ccw->ccw.pbt = IPL_PBT_CCW;
1820 dump_capabilities |= DUMP_TYPE_CCW;
1821 return 0;
1822 }
1823
dump_fcp_init(void)1824 static int __init dump_fcp_init(void)
1825 {
1826 int rc;
1827
1828 if (!sclp_ipl_info.has_dump)
1829 return 0; /* LDIPL DUMP is not installed */
1830 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1831 if (!dump_block_fcp)
1832 return -ENOMEM;
1833 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1834 if (rc) {
1835 free_page((unsigned long)dump_block_fcp);
1836 return rc;
1837 }
1838 dump_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1839 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1840 dump_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1841 dump_block_fcp->fcp.pbt = IPL_PBT_FCP;
1842 dump_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_DUMP;
1843 dump_capabilities |= DUMP_TYPE_FCP;
1844 return 0;
1845 }
1846
dump_nvme_init(void)1847 static int __init dump_nvme_init(void)
1848 {
1849 int rc;
1850
1851 if (!sclp_ipl_info.has_dump)
1852 return 0; /* LDIPL DUMP is not installed */
1853 dump_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
1854 if (!dump_block_nvme)
1855 return -ENOMEM;
1856 rc = sysfs_create_group(&dump_kset->kobj, &dump_nvme_attr_group);
1857 if (rc) {
1858 free_page((unsigned long)dump_block_nvme);
1859 return rc;
1860 }
1861 dump_block_nvme->hdr.len = IPL_BP_NVME_LEN;
1862 dump_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
1863 dump_block_nvme->nvme.len = IPL_BP0_NVME_LEN;
1864 dump_block_nvme->nvme.pbt = IPL_PBT_NVME;
1865 dump_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_DUMP;
1866 dump_capabilities |= DUMP_TYPE_NVME;
1867 return 0;
1868 }
1869
dump_eckd_init(void)1870 static int __init dump_eckd_init(void)
1871 {
1872 int rc;
1873
1874 if (!sclp_ipl_info.has_dump || !sclp.has_sipl_eckd)
1875 return 0; /* LDIPL DUMP is not installed */
1876 dump_block_eckd = (void *)get_zeroed_page(GFP_KERNEL);
1877 if (!dump_block_eckd)
1878 return -ENOMEM;
1879 rc = sysfs_create_group(&dump_kset->kobj, &dump_eckd_attr_group);
1880 if (rc) {
1881 free_page((unsigned long)dump_block_eckd);
1882 return rc;
1883 }
1884 dump_block_eckd->hdr.len = IPL_BP_ECKD_LEN;
1885 dump_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION;
1886 dump_block_eckd->eckd.len = IPL_BP0_ECKD_LEN;
1887 dump_block_eckd->eckd.pbt = IPL_PBT_ECKD;
1888 dump_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_DUMP;
1889 dump_capabilities |= DUMP_TYPE_ECKD;
1890 return 0;
1891 }
1892
dump_init(void)1893 static int __init dump_init(void)
1894 {
1895 int rc;
1896
1897 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1898 if (!dump_kset)
1899 return -ENOMEM;
1900 rc = sysfs_create_group(&dump_kset->kobj, &dump_attr_group);
1901 if (rc) {
1902 kset_unregister(dump_kset);
1903 return rc;
1904 }
1905 rc = dump_ccw_init();
1906 if (rc)
1907 return rc;
1908 rc = dump_eckd_init();
1909 if (rc)
1910 return rc;
1911 rc = dump_fcp_init();
1912 if (rc)
1913 return rc;
1914 rc = dump_nvme_init();
1915 if (rc)
1916 return rc;
1917 dump_set_type(DUMP_TYPE_NONE);
1918 return 0;
1919 }
1920
1921 static struct shutdown_action __refdata dump_action = {
1922 .name = SHUTDOWN_ACTION_DUMP_STR,
1923 .fn = dump_run,
1924 .init = dump_init,
1925 };
1926
dump_reipl_run(struct shutdown_trigger * trigger)1927 static void dump_reipl_run(struct shutdown_trigger *trigger)
1928 {
1929 struct lowcore *abs_lc;
1930 unsigned int csum;
1931
1932 /*
1933 * Set REIPL_CLEAR flag in os_info flags entry indicating
1934 * 'clear' sysfs attribute has been set on the panicked system
1935 * for specified reipl type.
1936 * Always set for IPL_TYPE_NSS and IPL_TYPE_UNKNOWN.
1937 */
1938 if ((reipl_type == IPL_TYPE_CCW && reipl_ccw_clear) ||
1939 (reipl_type == IPL_TYPE_ECKD && reipl_eckd_clear) ||
1940 (reipl_type == IPL_TYPE_FCP && reipl_fcp_clear) ||
1941 (reipl_type == IPL_TYPE_NVME && reipl_nvme_clear) ||
1942 reipl_type == IPL_TYPE_NSS ||
1943 reipl_type == IPL_TYPE_UNKNOWN)
1944 os_info_flags |= OS_INFO_FLAG_REIPL_CLEAR;
1945 os_info_entry_add_data(OS_INFO_FLAGS_ENTRY, &os_info_flags, sizeof(os_info_flags));
1946 csum = (__force unsigned int)cksm(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1947 abs_lc = get_abs_lowcore();
1948 abs_lc->ipib = __pa(reipl_block_actual);
1949 abs_lc->ipib_checksum = csum;
1950 put_abs_lowcore(abs_lc);
1951 dump_run(trigger);
1952 }
1953
1954 static struct shutdown_action __refdata dump_reipl_action = {
1955 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1956 .fn = dump_reipl_run,
1957 };
1958
1959 /*
1960 * vmcmd shutdown action: Trigger vm command on shutdown.
1961 */
1962
1963 #define VMCMD_MAX_SIZE 240
1964
1965 static char vmcmd_on_reboot[VMCMD_MAX_SIZE + 1];
1966 static char vmcmd_on_panic[VMCMD_MAX_SIZE + 1];
1967 static char vmcmd_on_halt[VMCMD_MAX_SIZE + 1];
1968 static char vmcmd_on_poff[VMCMD_MAX_SIZE + 1];
1969 static char vmcmd_on_restart[VMCMD_MAX_SIZE + 1];
1970
1971 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1972 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1973 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1974 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1975 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1976
1977 static struct attribute *vmcmd_attrs[] = {
1978 &sys_vmcmd_on_reboot_attr.attr,
1979 &sys_vmcmd_on_panic_attr.attr,
1980 &sys_vmcmd_on_halt_attr.attr,
1981 &sys_vmcmd_on_poff_attr.attr,
1982 &sys_vmcmd_on_restart_attr.attr,
1983 NULL,
1984 };
1985
1986 static struct attribute_group vmcmd_attr_group = {
1987 .attrs = vmcmd_attrs,
1988 };
1989
1990 static struct kset *vmcmd_kset;
1991
vmcmd_run(struct shutdown_trigger * trigger)1992 static void vmcmd_run(struct shutdown_trigger *trigger)
1993 {
1994 char *cmd;
1995
1996 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1997 cmd = vmcmd_on_reboot;
1998 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1999 cmd = vmcmd_on_panic;
2000 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
2001 cmd = vmcmd_on_halt;
2002 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
2003 cmd = vmcmd_on_poff;
2004 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
2005 cmd = vmcmd_on_restart;
2006 else
2007 return;
2008
2009 if (strlen(cmd) == 0)
2010 return;
2011 __cpcmd(cmd, NULL, 0, NULL);
2012 }
2013
vmcmd_init(void)2014 static int vmcmd_init(void)
2015 {
2016 if (!machine_is_vm())
2017 return -EOPNOTSUPP;
2018 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
2019 if (!vmcmd_kset)
2020 return -ENOMEM;
2021 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
2022 }
2023
2024 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
2025 vmcmd_run, vmcmd_init};
2026
2027 /*
2028 * stop shutdown action: Stop Linux on shutdown.
2029 */
2030
stop_run(struct shutdown_trigger * trigger)2031 static void stop_run(struct shutdown_trigger *trigger)
2032 {
2033 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
2034 strcmp(trigger->name, ON_RESTART_STR) == 0)
2035 disabled_wait();
2036 smp_stop_cpu();
2037 }
2038
2039 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
2040 stop_run, NULL};
2041
2042 /* action list */
2043
2044 static struct shutdown_action *shutdown_actions_list[] = {
2045 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
2046 &vmcmd_action, &stop_action};
2047 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
2048
2049 /*
2050 * Trigger section
2051 */
2052
2053 static struct kset *shutdown_actions_kset;
2054
set_trigger(const char * buf,struct shutdown_trigger * trigger,size_t len)2055 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
2056 size_t len)
2057 {
2058 int i;
2059
2060 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
2061 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
2062 if (shutdown_actions_list[i]->init_rc) {
2063 return shutdown_actions_list[i]->init_rc;
2064 } else {
2065 trigger->action = shutdown_actions_list[i];
2066 return len;
2067 }
2068 }
2069 }
2070 return -EINVAL;
2071 }
2072
2073 /* on reipl */
2074
2075 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
2076 &reipl_action};
2077
on_reboot_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)2078 static ssize_t on_reboot_show(struct kobject *kobj,
2079 struct kobj_attribute *attr, char *page)
2080 {
2081 return sysfs_emit(page, "%s\n", on_reboot_trigger.action->name);
2082 }
2083
on_reboot_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)2084 static ssize_t on_reboot_store(struct kobject *kobj,
2085 struct kobj_attribute *attr,
2086 const char *buf, size_t len)
2087 {
2088 return set_trigger(buf, &on_reboot_trigger, len);
2089 }
2090 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
2091
do_machine_restart(char * __unused)2092 static void do_machine_restart(char *__unused)
2093 {
2094 smp_send_stop();
2095 on_reboot_trigger.action->fn(&on_reboot_trigger);
2096 reipl_run(NULL);
2097 }
2098 void (*_machine_restart)(char *command) = do_machine_restart;
2099
2100 /* on panic */
2101
2102 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
2103
on_panic_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)2104 static ssize_t on_panic_show(struct kobject *kobj,
2105 struct kobj_attribute *attr, char *page)
2106 {
2107 return sysfs_emit(page, "%s\n", on_panic_trigger.action->name);
2108 }
2109
on_panic_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)2110 static ssize_t on_panic_store(struct kobject *kobj,
2111 struct kobj_attribute *attr,
2112 const char *buf, size_t len)
2113 {
2114 return set_trigger(buf, &on_panic_trigger, len);
2115 }
2116 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
2117
do_panic(void)2118 static void do_panic(void)
2119 {
2120 lgr_info_log();
2121 on_panic_trigger.action->fn(&on_panic_trigger);
2122 stop_run(&on_panic_trigger);
2123 }
2124
2125 /* on restart */
2126
2127 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
2128 &stop_action};
2129
on_restart_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)2130 static ssize_t on_restart_show(struct kobject *kobj,
2131 struct kobj_attribute *attr, char *page)
2132 {
2133 return sysfs_emit(page, "%s\n", on_restart_trigger.action->name);
2134 }
2135
on_restart_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)2136 static ssize_t on_restart_store(struct kobject *kobj,
2137 struct kobj_attribute *attr,
2138 const char *buf, size_t len)
2139 {
2140 return set_trigger(buf, &on_restart_trigger, len);
2141 }
2142 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
2143
__do_restart(void * ignore)2144 static void __do_restart(void *ignore)
2145 {
2146 smp_send_stop();
2147 #ifdef CONFIG_CRASH_DUMP
2148 crash_kexec(NULL);
2149 #endif
2150 on_restart_trigger.action->fn(&on_restart_trigger);
2151 stop_run(&on_restart_trigger);
2152 }
2153
do_restart(void * arg)2154 void do_restart(void *arg)
2155 {
2156 tracing_off();
2157 debug_locks_off();
2158 lgr_info_log();
2159 smp_call_ipl_cpu(__do_restart, arg);
2160 }
2161
2162 /* on halt */
2163
2164 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
2165
on_halt_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)2166 static ssize_t on_halt_show(struct kobject *kobj,
2167 struct kobj_attribute *attr, char *page)
2168 {
2169 return sysfs_emit(page, "%s\n", on_halt_trigger.action->name);
2170 }
2171
on_halt_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)2172 static ssize_t on_halt_store(struct kobject *kobj,
2173 struct kobj_attribute *attr,
2174 const char *buf, size_t len)
2175 {
2176 return set_trigger(buf, &on_halt_trigger, len);
2177 }
2178 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
2179
do_machine_halt(void)2180 static void do_machine_halt(void)
2181 {
2182 smp_send_stop();
2183 on_halt_trigger.action->fn(&on_halt_trigger);
2184 stop_run(&on_halt_trigger);
2185 }
2186 void (*_machine_halt)(void) = do_machine_halt;
2187
2188 /* on power off */
2189
2190 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
2191
on_poff_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)2192 static ssize_t on_poff_show(struct kobject *kobj,
2193 struct kobj_attribute *attr, char *page)
2194 {
2195 return sysfs_emit(page, "%s\n", on_poff_trigger.action->name);
2196 }
2197
on_poff_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)2198 static ssize_t on_poff_store(struct kobject *kobj,
2199 struct kobj_attribute *attr,
2200 const char *buf, size_t len)
2201 {
2202 return set_trigger(buf, &on_poff_trigger, len);
2203 }
2204 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
2205
do_machine_power_off(void)2206 static void do_machine_power_off(void)
2207 {
2208 smp_send_stop();
2209 on_poff_trigger.action->fn(&on_poff_trigger);
2210 stop_run(&on_poff_trigger);
2211 }
2212 void (*_machine_power_off)(void) = do_machine_power_off;
2213
2214 static struct attribute *shutdown_action_attrs[] = {
2215 &on_restart_attr.attr,
2216 &on_reboot_attr.attr,
2217 &on_panic_attr.attr,
2218 &on_halt_attr.attr,
2219 &on_poff_attr.attr,
2220 NULL,
2221 };
2222
2223 static struct attribute_group shutdown_action_attr_group = {
2224 .attrs = shutdown_action_attrs,
2225 };
2226
shutdown_triggers_init(void)2227 static void __init shutdown_triggers_init(void)
2228 {
2229 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
2230 firmware_kobj);
2231 if (!shutdown_actions_kset)
2232 goto fail;
2233 if (sysfs_create_group(&shutdown_actions_kset->kobj,
2234 &shutdown_action_attr_group))
2235 goto fail;
2236 return;
2237 fail:
2238 panic("shutdown_triggers_init failed\n");
2239 }
2240
shutdown_actions_init(void)2241 static void __init shutdown_actions_init(void)
2242 {
2243 int i;
2244
2245 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
2246 if (!shutdown_actions_list[i]->init)
2247 continue;
2248 shutdown_actions_list[i]->init_rc =
2249 shutdown_actions_list[i]->init();
2250 }
2251 }
2252
s390_ipl_init(void)2253 static int __init s390_ipl_init(void)
2254 {
2255 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
2256
2257 sclp_early_get_ipl_info(&sclp_ipl_info);
2258 /*
2259 * Fix loadparm: There are systems where the (SCSI) LOADPARM
2260 * returned by read SCP info is invalid (contains EBCDIC blanks)
2261 * when the system has been booted via diag308. In that case we use
2262 * the value from diag308, if available.
2263 *
2264 * There are also systems where diag308 store does not work in
2265 * case the system is booted from HMC. Fortunately in this case
2266 * READ SCP info provides the correct value.
2267 */
2268 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
2269 memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN);
2270 shutdown_actions_init();
2271 shutdown_triggers_init();
2272 return 0;
2273 }
2274
2275 __initcall(s390_ipl_init);
2276
strscpy_skip_quote(char * dst,char * src,int n)2277 static void __init strscpy_skip_quote(char *dst, char *src, int n)
2278 {
2279 int sx, dx;
2280
2281 if (!n)
2282 return;
2283 for (sx = 0, dx = 0; src[sx]; sx++) {
2284 if (src[sx] == '"')
2285 continue;
2286 dst[dx] = src[sx];
2287 if (dx + 1 == n)
2288 break;
2289 dx++;
2290 }
2291 dst[dx] = '\0';
2292 }
2293
vmcmd_on_reboot_setup(char * str)2294 static int __init vmcmd_on_reboot_setup(char *str)
2295 {
2296 if (!machine_is_vm())
2297 return 1;
2298 strscpy_skip_quote(vmcmd_on_reboot, str, sizeof(vmcmd_on_reboot));
2299 on_reboot_trigger.action = &vmcmd_action;
2300 return 1;
2301 }
2302 __setup("vmreboot=", vmcmd_on_reboot_setup);
2303
vmcmd_on_panic_setup(char * str)2304 static int __init vmcmd_on_panic_setup(char *str)
2305 {
2306 if (!machine_is_vm())
2307 return 1;
2308 strscpy_skip_quote(vmcmd_on_panic, str, sizeof(vmcmd_on_panic));
2309 on_panic_trigger.action = &vmcmd_action;
2310 return 1;
2311 }
2312 __setup("vmpanic=", vmcmd_on_panic_setup);
2313
vmcmd_on_halt_setup(char * str)2314 static int __init vmcmd_on_halt_setup(char *str)
2315 {
2316 if (!machine_is_vm())
2317 return 1;
2318 strscpy_skip_quote(vmcmd_on_halt, str, sizeof(vmcmd_on_halt));
2319 on_halt_trigger.action = &vmcmd_action;
2320 return 1;
2321 }
2322 __setup("vmhalt=", vmcmd_on_halt_setup);
2323
vmcmd_on_poff_setup(char * str)2324 static int __init vmcmd_on_poff_setup(char *str)
2325 {
2326 if (!machine_is_vm())
2327 return 1;
2328 strscpy_skip_quote(vmcmd_on_poff, str, sizeof(vmcmd_on_poff));
2329 on_poff_trigger.action = &vmcmd_action;
2330 return 1;
2331 }
2332 __setup("vmpoff=", vmcmd_on_poff_setup);
2333
on_panic_notify(struct notifier_block * self,unsigned long event,void * data)2334 static int on_panic_notify(struct notifier_block *self,
2335 unsigned long event, void *data)
2336 {
2337 do_panic();
2338 return NOTIFY_OK;
2339 }
2340
2341 static struct notifier_block on_panic_nb = {
2342 .notifier_call = on_panic_notify,
2343 .priority = INT_MIN,
2344 };
2345
setup_ipl(void)2346 void __init setup_ipl(void)
2347 {
2348 BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
2349
2350 ipl_info.type = get_ipl_type();
2351 switch (ipl_info.type) {
2352 case IPL_TYPE_CCW:
2353 ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid;
2354 ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno;
2355 break;
2356 case IPL_TYPE_ECKD:
2357 case IPL_TYPE_ECKD_DUMP:
2358 ipl_info.data.eckd.dev_id.ssid = ipl_block.eckd.ssid;
2359 ipl_info.data.eckd.dev_id.devno = ipl_block.eckd.devno;
2360 break;
2361 case IPL_TYPE_FCP:
2362 case IPL_TYPE_FCP_DUMP:
2363 ipl_info.data.fcp.dev_id.ssid = 0;
2364 ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno;
2365 ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn;
2366 ipl_info.data.fcp.lun = ipl_block.fcp.lun;
2367 break;
2368 case IPL_TYPE_NVME:
2369 case IPL_TYPE_NVME_DUMP:
2370 ipl_info.data.nvme.fid = ipl_block.nvme.fid;
2371 ipl_info.data.nvme.nsid = ipl_block.nvme.nsid;
2372 break;
2373 case IPL_TYPE_NSS:
2374 case IPL_TYPE_UNKNOWN:
2375 /* We have no info to copy */
2376 break;
2377 }
2378 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
2379 }
2380
s390_reset_system(void)2381 void __no_stack_protector s390_reset_system(void)
2382 {
2383 /* Disable prefixing */
2384 set_prefix(0);
2385
2386 /* Disable lowcore protection */
2387 local_ctl_clear_bit(0, CR0_LOW_ADDRESS_PROTECTION_BIT);
2388 diag_amode31_ops.diag308_reset();
2389 }
2390
arch_get_secureboot(void)2391 bool arch_get_secureboot(void)
2392 {
2393 return ipl_secure_flag;
2394 }
2395
2396 #ifdef CONFIG_KEXEC_FILE
2397
ipl_report_add_component(struct ipl_report * report,struct kexec_buf * kbuf,unsigned char flags,unsigned short cert)2398 int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
2399 unsigned char flags, unsigned short cert)
2400 {
2401 struct ipl_report_component *comp;
2402
2403 comp = vzalloc(sizeof(*comp));
2404 if (!comp)
2405 return -ENOMEM;
2406 list_add_tail(&comp->list, &report->components);
2407
2408 comp->entry.addr = kbuf->mem;
2409 comp->entry.len = kbuf->memsz;
2410 comp->entry.flags = flags;
2411 comp->entry.certificate_index = cert;
2412
2413 report->size += sizeof(comp->entry);
2414
2415 return 0;
2416 }
2417
ipl_report_add_certificate(struct ipl_report * report,void * key,unsigned long addr,unsigned long len)2418 int ipl_report_add_certificate(struct ipl_report *report, void *key,
2419 unsigned long addr, unsigned long len)
2420 {
2421 struct ipl_report_certificate *cert;
2422
2423 cert = vzalloc(sizeof(*cert));
2424 if (!cert)
2425 return -ENOMEM;
2426 list_add_tail(&cert->list, &report->certificates);
2427
2428 cert->entry.addr = addr;
2429 cert->entry.len = len;
2430 cert->key = key;
2431
2432 report->size += sizeof(cert->entry);
2433 report->size += cert->entry.len;
2434
2435 return 0;
2436 }
2437
ipl_report_init(struct ipl_parameter_block * ipib)2438 struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib)
2439 {
2440 struct ipl_report *report;
2441
2442 report = vzalloc(sizeof(*report));
2443 if (!report)
2444 return ERR_PTR(-ENOMEM);
2445
2446 report->ipib = ipib;
2447 INIT_LIST_HEAD(&report->components);
2448 INIT_LIST_HEAD(&report->certificates);
2449
2450 report->size = ALIGN(ipib->hdr.len, 8);
2451 report->size += sizeof(struct ipl_rl_hdr);
2452 report->size += sizeof(struct ipl_rb_components);
2453 report->size += sizeof(struct ipl_rb_certificates);
2454
2455 return report;
2456 }
2457
ipl_report_finish(struct ipl_report * report)2458 void *ipl_report_finish(struct ipl_report *report)
2459 {
2460 struct ipl_report_certificate *cert;
2461 struct ipl_report_component *comp;
2462 struct ipl_rb_certificates *certs;
2463 struct ipl_parameter_block *ipib;
2464 struct ipl_rb_components *comps;
2465 struct ipl_rl_hdr *rl_hdr;
2466 void *buf, *ptr;
2467
2468 buf = vzalloc(report->size);
2469 if (!buf)
2470 goto out;
2471 ptr = buf;
2472
2473 memcpy(ptr, report->ipib, report->ipib->hdr.len);
2474 ipib = ptr;
2475 if (ipl_secure_flag)
2476 ipib->hdr.flags |= IPL_PL_FLAG_SIPL;
2477 ipib->hdr.flags |= IPL_PL_FLAG_IPLSR;
2478 ptr += report->ipib->hdr.len;
2479 ptr = PTR_ALIGN(ptr, 8);
2480
2481 rl_hdr = ptr;
2482 ptr += sizeof(*rl_hdr);
2483
2484 comps = ptr;
2485 comps->rbt = IPL_RBT_COMPONENTS;
2486 ptr += sizeof(*comps);
2487 list_for_each_entry(comp, &report->components, list) {
2488 memcpy(ptr, &comp->entry, sizeof(comp->entry));
2489 ptr += sizeof(comp->entry);
2490 }
2491 comps->len = ptr - (void *)comps;
2492
2493 certs = ptr;
2494 certs->rbt = IPL_RBT_CERTIFICATES;
2495 ptr += sizeof(*certs);
2496 list_for_each_entry(cert, &report->certificates, list) {
2497 memcpy(ptr, &cert->entry, sizeof(cert->entry));
2498 ptr += sizeof(cert->entry);
2499 }
2500 certs->len = ptr - (void *)certs;
2501 rl_hdr->len = ptr - (void *)rl_hdr;
2502
2503 list_for_each_entry(cert, &report->certificates, list) {
2504 memcpy(ptr, cert->key, cert->entry.len);
2505 ptr += cert->entry.len;
2506 }
2507
2508 BUG_ON(ptr > buf + report->size);
2509 out:
2510 return buf;
2511 }
2512
ipl_report_free(struct ipl_report * report)2513 int ipl_report_free(struct ipl_report *report)
2514 {
2515 struct ipl_report_component *comp, *ncomp;
2516 struct ipl_report_certificate *cert, *ncert;
2517
2518 list_for_each_entry_safe(comp, ncomp, &report->components, list)
2519 vfree(comp);
2520
2521 list_for_each_entry_safe(cert, ncert, &report->certificates, list)
2522 vfree(cert);
2523
2524 vfree(report);
2525
2526 return 0;
2527 }
2528
2529 #endif
2530