Commit | Line | Data |
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411ed322 MH |
1 | /* |
2 | * zcore module to export memory content and register sets for creating system | |
3 | * dumps on SCSI disks (zfcpdump). The "zcore/mem" debugfs file shows the same | |
4 | * dump format as s390 standalone dumps. | |
5 | * | |
6 | * For more information please refer to Documentation/s390/zfcpdump.txt | |
7 | * | |
8 | * Copyright IBM Corp. 2003,2007 | |
9 | * Author(s): Michael Holzheu | |
10 | */ | |
11 | ||
12 | #include <linux/init.h> | |
13 | #include <linux/miscdevice.h> | |
14 | #include <linux/utsname.h> | |
15 | #include <linux/debugfs.h> | |
16 | #include <asm/ipl.h> | |
17 | #include <asm/sclp.h> | |
18 | #include <asm/setup.h> | |
19 | #include <asm/sigp.h> | |
20 | #include <asm/uaccess.h> | |
21 | #include <asm/debug.h> | |
22 | #include <asm/processor.h> | |
23 | #include <asm/irqflags.h> | |
763968e2 | 24 | #include "sclp.h" |
411ed322 MH |
25 | |
26 | #define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x) | |
27 | #define MSG(x...) printk( KERN_ALERT x ) | |
28 | #define ERROR_MSG(x...) printk ( KERN_ALERT "DUMP: " x ) | |
29 | ||
30 | #define TO_USER 0 | |
31 | #define TO_KERNEL 1 | |
32 | ||
33 | enum arch_id { | |
34 | ARCH_S390 = 0, | |
35 | ARCH_S390X = 1, | |
36 | }; | |
37 | ||
38 | /* dump system info */ | |
39 | ||
40 | struct sys_info { | |
41 | enum arch_id arch; | |
42 | unsigned long sa_base; | |
43 | u32 sa_size; | |
44 | int cpu_map[NR_CPUS]; | |
45 | unsigned long mem_size; | |
46 | union save_area lc_mask; | |
47 | }; | |
48 | ||
49 | static struct sys_info sys_info; | |
50 | static struct debug_info *zcore_dbf; | |
51 | static int hsa_available; | |
52 | static struct dentry *zcore_dir; | |
53 | static struct dentry *zcore_file; | |
54 | ||
55 | /* | |
56 | * Copy memory from HSA to kernel or user memory (not reentrant): | |
57 | * | |
58 | * @dest: Kernel or user buffer where memory should be copied to | |
59 | * @src: Start address within HSA where data should be copied | |
60 | * @count: Size of buffer, which should be copied | |
61 | * @mode: Either TO_KERNEL or TO_USER | |
62 | */ | |
63 | static int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode) | |
64 | { | |
65 | int offs, blk_num; | |
66 | static char buf[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE))); | |
67 | ||
68 | if (count == 0) | |
69 | return 0; | |
70 | ||
71 | /* copy first block */ | |
72 | offs = 0; | |
73 | if ((src % PAGE_SIZE) != 0) { | |
74 | blk_num = src / PAGE_SIZE + 2; | |
75 | if (sclp_sdias_copy(buf, blk_num, 1)) { | |
76 | TRACE("sclp_sdias_copy() failed\n"); | |
77 | return -EIO; | |
78 | } | |
79 | offs = min((PAGE_SIZE - (src % PAGE_SIZE)), count); | |
80 | if (mode == TO_USER) { | |
81 | if (copy_to_user((__force __user void*) dest, | |
82 | buf + (src % PAGE_SIZE), offs)) | |
83 | return -EFAULT; | |
84 | } else | |
85 | memcpy(dest, buf + (src % PAGE_SIZE), offs); | |
86 | } | |
87 | if (offs == count) | |
88 | goto out; | |
89 | ||
90 | /* copy middle */ | |
91 | for (; (offs + PAGE_SIZE) <= count; offs += PAGE_SIZE) { | |
92 | blk_num = (src + offs) / PAGE_SIZE + 2; | |
93 | if (sclp_sdias_copy(buf, blk_num, 1)) { | |
94 | TRACE("sclp_sdias_copy() failed\n"); | |
95 | return -EIO; | |
96 | } | |
97 | if (mode == TO_USER) { | |
98 | if (copy_to_user((__force __user void*) dest + offs, | |
99 | buf, PAGE_SIZE)) | |
100 | return -EFAULT; | |
101 | } else | |
102 | memcpy(dest + offs, buf, PAGE_SIZE); | |
103 | } | |
104 | if (offs == count) | |
105 | goto out; | |
106 | ||
107 | /* copy last block */ | |
108 | blk_num = (src + offs) / PAGE_SIZE + 2; | |
109 | if (sclp_sdias_copy(buf, blk_num, 1)) { | |
110 | TRACE("sclp_sdias_copy() failed\n"); | |
111 | return -EIO; | |
112 | } | |
113 | if (mode == TO_USER) { | |
114 | if (copy_to_user((__force __user void*) dest + offs, buf, | |
115 | PAGE_SIZE)) | |
116 | return -EFAULT; | |
117 | } else | |
118 | memcpy(dest + offs, buf, count - offs); | |
119 | out: | |
120 | return 0; | |
121 | } | |
122 | ||
123 | static int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count) | |
124 | { | |
125 | return memcpy_hsa((void __force *) dest, src, count, TO_USER); | |
126 | } | |
127 | ||
128 | static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count) | |
129 | { | |
130 | return memcpy_hsa(dest, src, count, TO_KERNEL); | |
131 | } | |
132 | ||
133 | static int memcpy_real(void *dest, unsigned long src, size_t count) | |
134 | { | |
135 | unsigned long flags; | |
136 | int rc = -EFAULT; | |
137 | register unsigned long _dest asm("2") = (unsigned long) dest; | |
138 | register unsigned long _len1 asm("3") = (unsigned long) count; | |
139 | register unsigned long _src asm("4") = src; | |
140 | register unsigned long _len2 asm("5") = (unsigned long) count; | |
141 | ||
142 | if (count == 0) | |
143 | return 0; | |
53a0868c | 144 | flags = __raw_local_irq_stnsm(0xf8UL); /* switch to real mode */ |
411ed322 MH |
145 | asm volatile ( |
146 | "0: mvcle %1,%2,0x0\n" | |
147 | "1: jo 0b\n" | |
148 | " lhi %0,0x0\n" | |
149 | "2:\n" | |
150 | EX_TABLE(1b,2b) | |
53a0868c MH |
151 | : "+d" (rc), "+d" (_dest), "+d" (_src), "+d" (_len1), |
152 | "+d" (_len2), "=m" (*((long*)dest)) | |
153 | : "m" (*((long*)src)) | |
411ed322 MH |
154 | : "cc", "memory"); |
155 | __raw_local_irq_ssm(flags); | |
156 | ||
157 | return rc; | |
158 | } | |
159 | ||
d9f774d4 | 160 | static int memcpy_real_user(void __user *dest, unsigned long src, size_t count) |
411ed322 MH |
161 | { |
162 | static char buf[4096]; | |
163 | int offs = 0, size; | |
164 | ||
165 | while (offs < count) { | |
166 | size = min(sizeof(buf), count - offs); | |
167 | if (memcpy_real(buf, src + offs, size)) | |
168 | return -EFAULT; | |
169 | if (copy_to_user(dest + offs, buf, size)) | |
170 | return -EFAULT; | |
171 | offs += size; | |
172 | } | |
173 | return 0; | |
174 | } | |
175 | ||
176 | #ifdef __s390x__ | |
177 | /* | |
178 | * Convert s390x (64 bit) cpu info to s390 (32 bit) cpu info | |
179 | */ | |
180 | static void __init s390x_to_s390_regs(union save_area *out, union save_area *in, | |
181 | int cpu) | |
182 | { | |
183 | int i; | |
184 | ||
185 | for (i = 0; i < 16; i++) { | |
186 | out->s390.gp_regs[i] = in->s390x.gp_regs[i] & 0x00000000ffffffff; | |
187 | out->s390.acc_regs[i] = in->s390x.acc_regs[i]; | |
188 | out->s390.ctrl_regs[i] = | |
189 | in->s390x.ctrl_regs[i] & 0x00000000ffffffff; | |
190 | } | |
191 | /* locore for 31 bit has only space for fpregs 0,2,4,6 */ | |
192 | out->s390.fp_regs[0] = in->s390x.fp_regs[0]; | |
193 | out->s390.fp_regs[1] = in->s390x.fp_regs[2]; | |
194 | out->s390.fp_regs[2] = in->s390x.fp_regs[4]; | |
195 | out->s390.fp_regs[3] = in->s390x.fp_regs[6]; | |
196 | memcpy(&(out->s390.psw[0]), &(in->s390x.psw[0]), 4); | |
197 | out->s390.psw[1] |= 0x8; /* set bit 12 */ | |
198 | memcpy(&(out->s390.psw[4]),&(in->s390x.psw[12]), 4); | |
199 | out->s390.psw[4] |= 0x80; /* set (31bit) addressing bit */ | |
200 | out->s390.pref_reg = in->s390x.pref_reg; | |
201 | out->s390.timer = in->s390x.timer; | |
202 | out->s390.clk_cmp = in->s390x.clk_cmp; | |
203 | } | |
204 | ||
205 | static void __init s390x_to_s390_save_areas(void) | |
206 | { | |
207 | int i = 1; | |
208 | static union save_area tmp; | |
209 | ||
210 | while (zfcpdump_save_areas[i]) { | |
211 | s390x_to_s390_regs(&tmp, zfcpdump_save_areas[i], i); | |
212 | memcpy(zfcpdump_save_areas[i], &tmp, sizeof(tmp)); | |
213 | i++; | |
214 | } | |
215 | } | |
216 | ||
217 | #endif /* __s390x__ */ | |
218 | ||
219 | static int __init init_cpu_info(enum arch_id arch) | |
220 | { | |
221 | union save_area *sa; | |
222 | ||
223 | /* get info for boot cpu from lowcore, stored in the HSA */ | |
224 | ||
225 | sa = kmalloc(sizeof(*sa), GFP_KERNEL); | |
226 | if (!sa) { | |
2a2cf6b1 | 227 | ERROR_MSG("kmalloc failed: %s: %i\n",__func__, __LINE__); |
411ed322 MH |
228 | return -ENOMEM; |
229 | } | |
230 | if (memcpy_hsa_kernel(sa, sys_info.sa_base, sys_info.sa_size) < 0) { | |
231 | ERROR_MSG("could not copy from HSA\n"); | |
232 | kfree(sa); | |
233 | return -EIO; | |
234 | } | |
235 | zfcpdump_save_areas[0] = sa; | |
236 | ||
237 | #ifdef __s390x__ | |
238 | /* convert s390x regs to s390, if we are dumping an s390 Linux */ | |
239 | ||
240 | if (arch == ARCH_S390) | |
241 | s390x_to_s390_save_areas(); | |
242 | #endif | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | static DEFINE_MUTEX(zcore_mutex); | |
248 | ||
249 | #define DUMP_VERSION 0x3 | |
250 | #define DUMP_MAGIC 0xa8190173618f23fdULL | |
251 | #define DUMP_ARCH_S390X 2 | |
252 | #define DUMP_ARCH_S390 1 | |
253 | #define HEADER_SIZE 4096 | |
254 | ||
255 | /* dump header dumped according to s390 crash dump format */ | |
256 | ||
257 | struct zcore_header { | |
258 | u64 magic; | |
259 | u32 version; | |
260 | u32 header_size; | |
261 | u32 dump_level; | |
262 | u32 page_size; | |
263 | u64 mem_size; | |
264 | u64 mem_start; | |
265 | u64 mem_end; | |
266 | u32 num_pages; | |
267 | u32 pad1; | |
268 | u64 tod; | |
269 | cpuid_t cpu_id; | |
270 | u32 arch_id; | |
ce444823 | 271 | u32 volnr; |
411ed322 | 272 | u32 build_arch; |
ce444823 | 273 | u64 rmem_size; |
411ed322 MH |
274 | char pad2[4016]; |
275 | } __attribute__((packed,__aligned__(16))); | |
276 | ||
277 | static struct zcore_header zcore_header = { | |
278 | .magic = DUMP_MAGIC, | |
279 | .version = DUMP_VERSION, | |
280 | .header_size = 4096, | |
281 | .dump_level = 0, | |
282 | .page_size = PAGE_SIZE, | |
283 | .mem_start = 0, | |
284 | #ifdef __s390x__ | |
285 | .build_arch = DUMP_ARCH_S390X, | |
286 | #else | |
287 | .build_arch = DUMP_ARCH_S390, | |
288 | #endif | |
289 | }; | |
290 | ||
291 | /* | |
292 | * Copy lowcore info to buffer. Use map in order to copy only register parts. | |
293 | * | |
294 | * @buf: User buffer | |
295 | * @sa: Pointer to save area | |
296 | * @sa_off: Offset in save area to copy | |
297 | * @len: Number of bytes to copy | |
298 | */ | |
299 | static int copy_lc(void __user *buf, void *sa, int sa_off, int len) | |
300 | { | |
301 | int i; | |
302 | char *lc_mask = (char*)&sys_info.lc_mask; | |
303 | ||
304 | for (i = 0; i < len; i++) { | |
305 | if (!lc_mask[i + sa_off]) | |
306 | continue; | |
307 | if (copy_to_user(buf + i, sa + sa_off + i, 1)) | |
308 | return -EFAULT; | |
309 | } | |
310 | return 0; | |
311 | } | |
312 | ||
313 | /* | |
314 | * Copy lowcores info to memory, if necessary | |
315 | * | |
316 | * @buf: User buffer | |
317 | * @addr: Start address of buffer in dump memory | |
318 | * @count: Size of buffer | |
319 | */ | |
320 | static int zcore_add_lc(char __user *buf, unsigned long start, size_t count) | |
321 | { | |
322 | unsigned long end; | |
323 | int i = 0; | |
324 | ||
325 | if (count == 0) | |
326 | return 0; | |
327 | ||
328 | end = start + count; | |
329 | while (zfcpdump_save_areas[i]) { | |
330 | unsigned long cp_start, cp_end; /* copy range */ | |
331 | unsigned long sa_start, sa_end; /* save area range */ | |
332 | unsigned long prefix; | |
333 | unsigned long sa_off, len, buf_off; | |
334 | ||
335 | if (sys_info.arch == ARCH_S390) | |
336 | prefix = zfcpdump_save_areas[i]->s390.pref_reg; | |
337 | else | |
338 | prefix = zfcpdump_save_areas[i]->s390x.pref_reg; | |
339 | ||
340 | sa_start = prefix + sys_info.sa_base; | |
341 | sa_end = prefix + sys_info.sa_base + sys_info.sa_size; | |
342 | ||
343 | if ((end < sa_start) || (start > sa_end)) | |
344 | goto next; | |
345 | cp_start = max(start, sa_start); | |
346 | cp_end = min(end, sa_end); | |
347 | ||
348 | buf_off = cp_start - start; | |
349 | sa_off = cp_start - sa_start; | |
350 | len = cp_end - cp_start; | |
351 | ||
352 | TRACE("copy_lc for: %lx\n", start); | |
353 | if (copy_lc(buf + buf_off, zfcpdump_save_areas[i], sa_off, len)) | |
354 | return -EFAULT; | |
355 | next: | |
356 | i++; | |
357 | } | |
358 | return 0; | |
359 | } | |
360 | ||
361 | /* | |
362 | * Read routine for zcore character device | |
363 | * First 4K are dump header | |
364 | * Next 32MB are HSA Memory | |
365 | * Rest is read from absolute Memory | |
366 | */ | |
367 | static ssize_t zcore_read(struct file *file, char __user *buf, size_t count, | |
368 | loff_t *ppos) | |
369 | { | |
370 | unsigned long mem_start; /* Start address in memory */ | |
371 | size_t mem_offs; /* Offset in dump memory */ | |
372 | size_t hdr_count; /* Size of header part of output buffer */ | |
373 | size_t size; | |
374 | int rc; | |
375 | ||
376 | mutex_lock(&zcore_mutex); | |
377 | ||
378 | if (*ppos > (sys_info.mem_size + HEADER_SIZE)) { | |
379 | rc = -EINVAL; | |
380 | goto fail; | |
381 | } | |
382 | ||
383 | count = min(count, (size_t) (sys_info.mem_size + HEADER_SIZE - *ppos)); | |
384 | ||
385 | /* Copy dump header */ | |
386 | if (*ppos < HEADER_SIZE) { | |
387 | size = min(count, (size_t) (HEADER_SIZE - *ppos)); | |
388 | if (copy_to_user(buf, &zcore_header + *ppos, size)) { | |
389 | rc = -EFAULT; | |
390 | goto fail; | |
391 | } | |
392 | hdr_count = size; | |
393 | mem_start = 0; | |
394 | } else { | |
395 | hdr_count = 0; | |
396 | mem_start = *ppos - HEADER_SIZE; | |
397 | } | |
398 | ||
399 | mem_offs = 0; | |
400 | ||
401 | /* Copy from HSA data */ | |
402 | if (*ppos < (ZFCPDUMP_HSA_SIZE + HEADER_SIZE)) { | |
403 | size = min((count - hdr_count), (size_t) (ZFCPDUMP_HSA_SIZE | |
404 | - mem_start)); | |
405 | rc = memcpy_hsa_user(buf + hdr_count, mem_start, size); | |
406 | if (rc) | |
407 | goto fail; | |
408 | ||
409 | mem_offs += size; | |
410 | } | |
411 | ||
412 | /* Copy from real mem */ | |
413 | size = count - mem_offs - hdr_count; | |
414 | rc = memcpy_real_user(buf + hdr_count + mem_offs, mem_start + mem_offs, | |
415 | size); | |
416 | if (rc) | |
417 | goto fail; | |
418 | ||
419 | /* | |
420 | * Since s390 dump analysis tools like lcrash or crash | |
421 | * expect register sets in the prefix pages of the cpus, | |
422 | * we copy them into the read buffer, if necessary. | |
423 | * buf + hdr_count: Start of memory part of output buffer | |
424 | * mem_start: Start memory address to copy from | |
425 | * count - hdr_count: Size of memory area to copy | |
426 | */ | |
427 | if (zcore_add_lc(buf + hdr_count, mem_start, count - hdr_count)) { | |
428 | rc = -EFAULT; | |
429 | goto fail; | |
430 | } | |
431 | *ppos += count; | |
432 | fail: | |
433 | mutex_unlock(&zcore_mutex); | |
434 | return (rc < 0) ? rc : count; | |
435 | } | |
436 | ||
437 | static int zcore_open(struct inode *inode, struct file *filp) | |
438 | { | |
439 | if (!hsa_available) | |
440 | return -ENODATA; | |
441 | else | |
442 | return capable(CAP_SYS_RAWIO) ? 0 : -EPERM; | |
443 | } | |
444 | ||
445 | static int zcore_release(struct inode *inode, struct file *filep) | |
446 | { | |
447 | diag308(DIAG308_REL_HSA, NULL); | |
448 | hsa_available = 0; | |
449 | return 0; | |
450 | } | |
451 | ||
452 | static loff_t zcore_lseek(struct file *file, loff_t offset, int orig) | |
453 | { | |
454 | loff_t rc; | |
455 | ||
456 | mutex_lock(&zcore_mutex); | |
457 | switch (orig) { | |
458 | case 0: | |
459 | file->f_pos = offset; | |
460 | rc = file->f_pos; | |
461 | break; | |
462 | case 1: | |
463 | file->f_pos += offset; | |
464 | rc = file->f_pos; | |
465 | break; | |
466 | default: | |
467 | rc = -EINVAL; | |
468 | } | |
469 | mutex_unlock(&zcore_mutex); | |
470 | return rc; | |
471 | } | |
472 | ||
5c81cdbe | 473 | static const struct file_operations zcore_fops = { |
411ed322 MH |
474 | .owner = THIS_MODULE, |
475 | .llseek = zcore_lseek, | |
476 | .read = zcore_read, | |
477 | .open = zcore_open, | |
478 | .release = zcore_release, | |
479 | }; | |
480 | ||
481 | ||
482 | static void __init set_s390_lc_mask(union save_area *map) | |
483 | { | |
484 | memset(&map->s390.ext_save, 0xff, sizeof(map->s390.ext_save)); | |
485 | memset(&map->s390.timer, 0xff, sizeof(map->s390.timer)); | |
486 | memset(&map->s390.clk_cmp, 0xff, sizeof(map->s390.clk_cmp)); | |
487 | memset(&map->s390.psw, 0xff, sizeof(map->s390.psw)); | |
488 | memset(&map->s390.pref_reg, 0xff, sizeof(map->s390.pref_reg)); | |
489 | memset(&map->s390.acc_regs, 0xff, sizeof(map->s390.acc_regs)); | |
490 | memset(&map->s390.fp_regs, 0xff, sizeof(map->s390.fp_regs)); | |
491 | memset(&map->s390.gp_regs, 0xff, sizeof(map->s390.gp_regs)); | |
492 | memset(&map->s390.ctrl_regs, 0xff, sizeof(map->s390.ctrl_regs)); | |
493 | } | |
494 | ||
495 | static void __init set_s390x_lc_mask(union save_area *map) | |
496 | { | |
497 | memset(&map->s390x.fp_regs, 0xff, sizeof(map->s390x.fp_regs)); | |
498 | memset(&map->s390x.gp_regs, 0xff, sizeof(map->s390x.gp_regs)); | |
499 | memset(&map->s390x.psw, 0xff, sizeof(map->s390x.psw)); | |
500 | memset(&map->s390x.pref_reg, 0xff, sizeof(map->s390x.pref_reg)); | |
501 | memset(&map->s390x.fp_ctrl_reg, 0xff, sizeof(map->s390x.fp_ctrl_reg)); | |
502 | memset(&map->s390x.tod_reg, 0xff, sizeof(map->s390x.tod_reg)); | |
503 | memset(&map->s390x.timer, 0xff, sizeof(map->s390x.timer)); | |
504 | memset(&map->s390x.clk_cmp, 0xff, sizeof(map->s390x.clk_cmp)); | |
505 | memset(&map->s390x.acc_regs, 0xff, sizeof(map->s390x.acc_regs)); | |
506 | memset(&map->s390x.ctrl_regs, 0xff, sizeof(map->s390x.ctrl_regs)); | |
507 | } | |
508 | ||
509 | /* | |
510 | * Initialize dump globals for a given architecture | |
511 | */ | |
512 | static int __init sys_info_init(enum arch_id arch) | |
513 | { | |
514 | switch (arch) { | |
515 | case ARCH_S390X: | |
516 | MSG("DETECTED 'S390X (64 bit) OS'\n"); | |
517 | sys_info.sa_base = SAVE_AREA_BASE_S390X; | |
518 | sys_info.sa_size = sizeof(struct save_area_s390x); | |
519 | set_s390x_lc_mask(&sys_info.lc_mask); | |
520 | break; | |
521 | case ARCH_S390: | |
522 | MSG("DETECTED 'S390 (32 bit) OS'\n"); | |
523 | sys_info.sa_base = SAVE_AREA_BASE_S390; | |
524 | sys_info.sa_size = sizeof(struct save_area_s390); | |
525 | set_s390_lc_mask(&sys_info.lc_mask); | |
526 | break; | |
527 | default: | |
528 | ERROR_MSG("unknown architecture 0x%x.\n",arch); | |
529 | return -EINVAL; | |
530 | } | |
531 | sys_info.arch = arch; | |
532 | if (init_cpu_info(arch)) { | |
533 | ERROR_MSG("get cpu info failed\n"); | |
534 | return -ENOMEM; | |
535 | } | |
536 | sys_info.mem_size = real_memory_size; | |
537 | ||
538 | return 0; | |
539 | } | |
540 | ||
541 | static int __init check_sdias(void) | |
542 | { | |
543 | int rc, act_hsa_size; | |
544 | ||
545 | rc = sclp_sdias_blk_count(); | |
546 | if (rc < 0) { | |
547 | ERROR_MSG("Could not determine HSA size\n"); | |
548 | return rc; | |
549 | } | |
550 | act_hsa_size = (rc - 1) * PAGE_SIZE; | |
551 | if (act_hsa_size < ZFCPDUMP_HSA_SIZE) { | |
552 | ERROR_MSG("HSA size too small: %i\n", act_hsa_size); | |
553 | return -EINVAL; | |
554 | } | |
555 | return 0; | |
556 | } | |
557 | ||
558 | static void __init zcore_header_init(int arch, struct zcore_header *hdr) | |
559 | { | |
560 | if (arch == ARCH_S390X) | |
561 | hdr->arch_id = DUMP_ARCH_S390X; | |
562 | else | |
563 | hdr->arch_id = DUMP_ARCH_S390; | |
564 | hdr->mem_size = sys_info.mem_size; | |
ce444823 | 565 | hdr->rmem_size = sys_info.mem_size; |
411ed322 MH |
566 | hdr->mem_end = sys_info.mem_size; |
567 | hdr->num_pages = sys_info.mem_size / PAGE_SIZE; | |
568 | hdr->tod = get_clock(); | |
569 | get_cpu_id(&hdr->cpu_id); | |
570 | } | |
571 | ||
411ed322 MH |
572 | static int __init zcore_init(void) |
573 | { | |
574 | unsigned char arch; | |
575 | int rc; | |
576 | ||
577 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) | |
578 | return -ENODATA; | |
579 | ||
580 | zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long)); | |
581 | debug_register_view(zcore_dbf, &debug_sprintf_view); | |
582 | debug_set_level(zcore_dbf, 6); | |
583 | ||
584 | TRACE("devno: %x\n", ipl_info.data.fcp.dev_id.devno); | |
585 | TRACE("wwpn: %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn); | |
586 | TRACE("lun: %llx\n", (unsigned long long) ipl_info.data.fcp.lun); | |
587 | ||
763968e2 | 588 | rc = sclp_sdias_init(); |
411ed322 MH |
589 | if (rc) |
590 | goto fail; | |
591 | ||
592 | rc = check_sdias(); | |
593 | if (rc) { | |
594 | ERROR_MSG("Dump initialization failed\n"); | |
595 | goto fail; | |
596 | } | |
597 | ||
598 | rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1); | |
599 | if (rc) { | |
600 | ERROR_MSG("sdial memcpy for arch id failed\n"); | |
601 | goto fail; | |
602 | } | |
603 | ||
604 | #ifndef __s390x__ | |
605 | if (arch == ARCH_S390X) { | |
606 | ERROR_MSG("32 bit dumper can't dump 64 bit system!\n"); | |
607 | rc = -EINVAL; | |
608 | goto fail; | |
609 | } | |
610 | #endif | |
611 | ||
612 | rc = sys_info_init(arch); | |
613 | if (rc) { | |
614 | ERROR_MSG("arch init failed\n"); | |
615 | goto fail; | |
616 | } | |
617 | ||
618 | zcore_header_init(arch, &zcore_header); | |
619 | ||
620 | zcore_dir = debugfs_create_dir("zcore" , NULL); | |
621 | if (!zcore_dir) { | |
622 | rc = -ENOMEM; | |
623 | goto fail; | |
624 | } | |
625 | zcore_file = debugfs_create_file("mem", S_IRUSR, zcore_dir, NULL, | |
626 | &zcore_fops); | |
627 | if (!zcore_file) { | |
628 | debugfs_remove(zcore_dir); | |
629 | rc = -ENOMEM; | |
630 | goto fail; | |
631 | } | |
632 | hsa_available = 1; | |
633 | return 0; | |
634 | ||
635 | fail: | |
636 | diag308(DIAG308_REL_HSA, NULL); | |
637 | return rc; | |
638 | } | |
639 | ||
411ed322 MH |
640 | static void __exit zcore_exit(void) |
641 | { | |
642 | debug_unregister(zcore_dbf); | |
763968e2 | 643 | sclp_sdias_exit(); |
411ed322 MH |
644 | diag308(DIAG308_REL_HSA, NULL); |
645 | } | |
646 | ||
647 | MODULE_AUTHOR("Copyright IBM Corp. 2003,2007"); | |
648 | MODULE_DESCRIPTION("zcore module for zfcpdump support"); | |
649 | MODULE_LICENSE("GPL"); | |
650 | ||
651 | subsys_initcall(zcore_init); | |
652 | module_exit(zcore_exit); |