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