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8#include <linux/debugfs.h>
9#include <linux/kernel.h>
10#include <linux/mm.h>
11#include <linux/proc_fs.h>
12#include <linux/seq_file.h>
13#include <linux/init.h>
14#include <linux/delay.h>
15#include <linux/export.h>
16#include <linux/slab.h>
17#include <asm/ebcdic.h>
18#include <asm/debug.h>
19#include <asm/sysinfo.h>
20#include <asm/cpcmd.h>
21#include <asm/topology.h>
22#include <asm/fpu/api.h>
23
24int topology_max_mnest;
25
26static inline int __stsi(void *sysinfo, int fc, int sel1, int sel2, int *lvl)
27{
28 register int r0 asm("0") = (fc << 28) | sel1;
29 register int r1 asm("1") = sel2;
30 int rc = 0;
31
32 asm volatile(
33 " stsi 0(%3)\n"
34 "0: jz 2f\n"
35 "1: lhi %1,%4\n"
36 "2:\n"
37 EX_TABLE(0b, 1b)
38 : "+d" (r0), "+d" (rc)
39 : "d" (r1), "a" (sysinfo), "K" (-EOPNOTSUPP)
40 : "cc", "memory");
41 *lvl = ((unsigned int) r0) >> 28;
42 return rc;
43}
44
45
46
47
48
49
50
51int stsi(void *sysinfo, int fc, int sel1, int sel2)
52{
53 int lvl, rc;
54
55 rc = __stsi(sysinfo, fc, sel1, sel2, &lvl);
56 if (rc)
57 return rc;
58 return fc ? 0 : lvl;
59}
60EXPORT_SYMBOL(stsi);
61
62static bool convert_ext_name(unsigned char encoding, char *name, size_t len)
63{
64 switch (encoding) {
65 case 1:
66 EBCASC(name, len);
67 break;
68 case 2:
69 break;
70 default:
71 return false;
72 }
73 return true;
74}
75
76static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info)
77{
78 int i;
79
80 if (stsi(info, 1, 1, 1))
81 return;
82 EBCASC(info->manufacturer, sizeof(info->manufacturer));
83 EBCASC(info->type, sizeof(info->type));
84 EBCASC(info->model, sizeof(info->model));
85 EBCASC(info->sequence, sizeof(info->sequence));
86 EBCASC(info->plant, sizeof(info->plant));
87 EBCASC(info->model_capacity, sizeof(info->model_capacity));
88 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
89 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
90 seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer);
91 seq_printf(m, "Type: %-4.4s\n", info->type);
92 if (info->lic)
93 seq_printf(m, "LIC Identifier: %016lx\n", info->lic);
94
95
96
97
98
99
100
101 seq_printf(m, "Model: %-16.16s", info->model_capacity);
102 if (info->model[0] != '\0')
103 seq_printf(m, " %-16.16s", info->model);
104 seq_putc(m, '\n');
105 seq_printf(m, "Sequence Code: %-16.16s\n", info->sequence);
106 seq_printf(m, "Plant: %-4.4s\n", info->plant);
107 seq_printf(m, "Model Capacity: %-16.16s %08u\n",
108 info->model_capacity, info->model_cap_rating);
109 if (info->model_perm_cap_rating)
110 seq_printf(m, "Model Perm. Capacity: %-16.16s %08u\n",
111 info->model_perm_cap,
112 info->model_perm_cap_rating);
113 if (info->model_temp_cap_rating)
114 seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n",
115 info->model_temp_cap,
116 info->model_temp_cap_rating);
117 if (info->ncr)
118 seq_printf(m, "Nominal Cap. Rating: %08u\n", info->ncr);
119 if (info->npr)
120 seq_printf(m, "Nominal Perm. Rating: %08u\n", info->npr);
121 if (info->ntr)
122 seq_printf(m, "Nominal Temp. Rating: %08u\n", info->ntr);
123 if (info->cai) {
124 seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai);
125 seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr);
126 seq_printf(m, "Capacity Transient: %d\n", info->t);
127 }
128 if (info->p) {
129 for (i = 1; i <= ARRAY_SIZE(info->typepct); i++) {
130 seq_printf(m, "Type %d Percentage: %d\n",
131 i, info->typepct[i - 1]);
132 }
133 }
134}
135
136static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info)
137{
138 int i;
139
140 seq_putc(m, '\n');
141 if (!MACHINE_HAS_TOPOLOGY)
142 return;
143 if (stsi(info, 15, 1, topology_max_mnest))
144 return;
145 seq_printf(m, "CPU Topology HW: ");
146 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
147 seq_printf(m, " %d", info->mag[i]);
148 seq_putc(m, '\n');
149#ifdef CONFIG_SCHED_TOPOLOGY
150 store_topology(info);
151 seq_printf(m, "CPU Topology SW: ");
152 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
153 seq_printf(m, " %d", info->mag[i]);
154 seq_putc(m, '\n');
155#endif
156}
157
158static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info)
159{
160 struct sysinfo_1_2_2_extension *ext;
161 int i;
162
163 if (stsi(info, 1, 2, 2))
164 return;
165 ext = (struct sysinfo_1_2_2_extension *)
166 ((unsigned long) info + info->acc_offset);
167 seq_printf(m, "CPUs Total: %d\n", info->cpus_total);
168 seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured);
169 seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby);
170 seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved);
171 if (info->mt_installed) {
172 seq_printf(m, "CPUs G-MTID: %d\n", info->mt_gtid);
173 seq_printf(m, "CPUs S-MTID: %d\n", info->mt_stid);
174 }
175
176
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179
180
181
182
183
184 seq_printf(m, "Capability: %u", info->capability);
185 if (info->format == 1)
186 seq_printf(m, " %u", ext->alt_capability);
187 seq_putc(m, '\n');
188 if (info->nominal_cap)
189 seq_printf(m, "Nominal Capability: %d\n", info->nominal_cap);
190 if (info->secondary_cap)
191 seq_printf(m, "Secondary Capability: %d\n", info->secondary_cap);
192 for (i = 2; i <= info->cpus_total; i++) {
193 seq_printf(m, "Adjustment %02d-way: %u",
194 i, info->adjustment[i-2]);
195 if (info->format == 1)
196 seq_printf(m, " %u", ext->alt_adjustment[i-2]);
197 seq_putc(m, '\n');
198 }
199}
200
201static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info)
202{
203 if (stsi(info, 2, 2, 2))
204 return;
205 EBCASC(info->name, sizeof(info->name));
206 seq_putc(m, '\n');
207 seq_printf(m, "LPAR Number: %d\n", info->lpar_number);
208 seq_printf(m, "LPAR Characteristics: ");
209 if (info->characteristics & LPAR_CHAR_DEDICATED)
210 seq_printf(m, "Dedicated ");
211 if (info->characteristics & LPAR_CHAR_SHARED)
212 seq_printf(m, "Shared ");
213 if (info->characteristics & LPAR_CHAR_LIMITED)
214 seq_printf(m, "Limited ");
215 seq_putc(m, '\n');
216 seq_printf(m, "LPAR Name: %-8.8s\n", info->name);
217 seq_printf(m, "LPAR Adjustment: %d\n", info->caf);
218 seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total);
219 seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured);
220 seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby);
221 seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved);
222 seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated);
223 seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared);
224 if (info->mt_installed) {
225 seq_printf(m, "LPAR CPUs G-MTID: %d\n", info->mt_gtid);
226 seq_printf(m, "LPAR CPUs S-MTID: %d\n", info->mt_stid);
227 seq_printf(m, "LPAR CPUs PS-MTID: %d\n", info->mt_psmtid);
228 }
229 if (convert_ext_name(info->vsne, info->ext_name, sizeof(info->ext_name))) {
230 seq_printf(m, "LPAR Extended Name: %-.256s\n", info->ext_name);
231 seq_printf(m, "LPAR UUID: %pUb\n", &info->uuid);
232 }
233}
234
235static void print_ext_name(struct seq_file *m, int lvl,
236 struct sysinfo_3_2_2 *info)
237{
238 size_t len = sizeof(info->ext_names[lvl]);
239
240 if (!convert_ext_name(info->vm[lvl].evmne, info->ext_names[lvl], len))
241 return;
242 seq_printf(m, "VM%02d Extended Name: %-.256s\n", lvl,
243 info->ext_names[lvl]);
244}
245
246static void print_uuid(struct seq_file *m, int i, struct sysinfo_3_2_2 *info)
247{
248 if (uuid_is_null(&info->vm[i].uuid))
249 return;
250 seq_printf(m, "VM%02d UUID: %pUb\n", i, &info->vm[i].uuid);
251}
252
253static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info)
254{
255 int i;
256
257 if (stsi(info, 3, 2, 2))
258 return;
259 for (i = 0; i < info->count; i++) {
260 EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
261 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
262 seq_putc(m, '\n');
263 seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name);
264 seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi);
265 seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf);
266 seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total);
267 seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured);
268 seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby);
269 seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved);
270 print_ext_name(m, i, info);
271 print_uuid(m, i, info);
272 }
273}
274
275static int sysinfo_show(struct seq_file *m, void *v)
276{
277 void *info = (void *)get_zeroed_page(GFP_KERNEL);
278 int level;
279
280 if (!info)
281 return 0;
282 level = stsi(NULL, 0, 0, 0);
283 if (level >= 1)
284 stsi_1_1_1(m, info);
285 if (level >= 1)
286 stsi_15_1_x(m, info);
287 if (level >= 1)
288 stsi_1_2_2(m, info);
289 if (level >= 2)
290 stsi_2_2_2(m, info);
291 if (level >= 3)
292 stsi_3_2_2(m, info);
293 free_page((unsigned long)info);
294 return 0;
295}
296
297static int __init sysinfo_create_proc(void)
298{
299 proc_create_single("sysinfo", 0444, NULL, sysinfo_show);
300 return 0;
301}
302device_initcall(sysinfo_create_proc);
303
304
305
306
307
308static DECLARE_RWSEM(service_level_sem);
309static LIST_HEAD(service_level_list);
310
311int register_service_level(struct service_level *slr)
312{
313 struct service_level *ptr;
314
315 down_write(&service_level_sem);
316 list_for_each_entry(ptr, &service_level_list, list)
317 if (ptr == slr) {
318 up_write(&service_level_sem);
319 return -EEXIST;
320 }
321 list_add_tail(&slr->list, &service_level_list);
322 up_write(&service_level_sem);
323 return 0;
324}
325EXPORT_SYMBOL(register_service_level);
326
327int unregister_service_level(struct service_level *slr)
328{
329 struct service_level *ptr, *next;
330 int rc = -ENOENT;
331
332 down_write(&service_level_sem);
333 list_for_each_entry_safe(ptr, next, &service_level_list, list) {
334 if (ptr != slr)
335 continue;
336 list_del(&ptr->list);
337 rc = 0;
338 break;
339 }
340 up_write(&service_level_sem);
341 return rc;
342}
343EXPORT_SYMBOL(unregister_service_level);
344
345static void *service_level_start(struct seq_file *m, loff_t *pos)
346{
347 down_read(&service_level_sem);
348 return seq_list_start(&service_level_list, *pos);
349}
350
351static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
352{
353 return seq_list_next(p, &service_level_list, pos);
354}
355
356static void service_level_stop(struct seq_file *m, void *p)
357{
358 up_read(&service_level_sem);
359}
360
361static int service_level_show(struct seq_file *m, void *p)
362{
363 struct service_level *slr;
364
365 slr = list_entry(p, struct service_level, list);
366 slr->seq_print(m, slr);
367 return 0;
368}
369
370static const struct seq_operations service_level_seq_ops = {
371 .start = service_level_start,
372 .next = service_level_next,
373 .stop = service_level_stop,
374 .show = service_level_show
375};
376
377static void service_level_vm_print(struct seq_file *m,
378 struct service_level *slr)
379{
380 char *query_buffer, *str;
381
382 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
383 if (!query_buffer)
384 return;
385 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
386 str = strchr(query_buffer, '\n');
387 if (str)
388 *str = 0;
389 seq_printf(m, "VM: %s\n", query_buffer);
390 kfree(query_buffer);
391}
392
393static struct service_level service_level_vm = {
394 .seq_print = service_level_vm_print
395};
396
397static __init int create_proc_service_level(void)
398{
399 proc_create_seq("service_levels", 0, NULL, &service_level_seq_ops);
400 if (MACHINE_IS_VM)
401 register_service_level(&service_level_vm);
402 return 0;
403}
404subsys_initcall(create_proc_service_level);
405
406
407
408
409void s390_adjust_jiffies(void)
410{
411 struct sysinfo_1_2_2 *info;
412 unsigned long capability;
413 struct kernel_fpu fpu;
414
415 info = (void *) get_zeroed_page(GFP_KERNEL);
416 if (!info)
417 return;
418
419 if (stsi(info, 1, 2, 2) == 0) {
420
421
422
423
424
425
426
427
428
429
430
431 kernel_fpu_begin(&fpu, KERNEL_FPR);
432 asm volatile(
433 " sfpc %3\n"
434 " l %0,%1\n"
435 " tmlh %0,0xff80\n"
436 " jnz 0f\n"
437 " cefbr %%f2,%0\n"
438 " j 1f\n"
439 "0: le %%f2,%1\n"
440 "1: cefbr %%f0,%2\n"
441 " debr %%f0,%%f2\n"
442 " cgebr %0,5,%%f0\n"
443 : "=&d" (capability)
444 : "Q" (info->capability), "d" (10000000), "d" (0)
445 : "cc"
446 );
447 kernel_fpu_end(&fpu, KERNEL_FPR);
448 } else
449
450
451
452
453 capability = 42;
454 loops_per_jiffy = capability * (500000/HZ);
455 free_page((unsigned long) info);
456}
457
458
459
460
461void calibrate_delay(void)
462{
463 s390_adjust_jiffies();
464
465 printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
466 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
467 (loops_per_jiffy/(5000/HZ)) % 100);
468}
469
470#ifdef CONFIG_DEBUG_FS
471
472#define STSI_FILE(fc, s1, s2) \
473static int stsi_open_##fc##_##s1##_##s2(struct inode *inode, struct file *file)\
474{ \
475 file->private_data = (void *) get_zeroed_page(GFP_KERNEL); \
476 if (!file->private_data) \
477 return -ENOMEM; \
478 if (stsi(file->private_data, fc, s1, s2)) { \
479 free_page((unsigned long)file->private_data); \
480 file->private_data = NULL; \
481 return -EACCES; \
482 } \
483 return nonseekable_open(inode, file); \
484} \
485 \
486static const struct file_operations stsi_##fc##_##s1##_##s2##_fs_ops = { \
487 .open = stsi_open_##fc##_##s1##_##s2, \
488 .release = stsi_release, \
489 .read = stsi_read, \
490 .llseek = no_llseek, \
491};
492
493static int stsi_release(struct inode *inode, struct file *file)
494{
495 free_page((unsigned long)file->private_data);
496 return 0;
497}
498
499static ssize_t stsi_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
500{
501 return simple_read_from_buffer(buf, size, ppos, file->private_data, PAGE_SIZE);
502}
503
504STSI_FILE( 1, 1, 1);
505STSI_FILE( 1, 2, 1);
506STSI_FILE( 1, 2, 2);
507STSI_FILE( 2, 2, 1);
508STSI_FILE( 2, 2, 2);
509STSI_FILE( 3, 2, 2);
510STSI_FILE(15, 1, 2);
511STSI_FILE(15, 1, 3);
512STSI_FILE(15, 1, 4);
513STSI_FILE(15, 1, 5);
514STSI_FILE(15, 1, 6);
515
516struct stsi_file {
517 const struct file_operations *fops;
518 char *name;
519};
520
521static struct stsi_file stsi_file[] __initdata = {
522 {.fops = &stsi_1_1_1_fs_ops, .name = "1_1_1"},
523 {.fops = &stsi_1_2_1_fs_ops, .name = "1_2_1"},
524 {.fops = &stsi_1_2_2_fs_ops, .name = "1_2_2"},
525 {.fops = &stsi_2_2_1_fs_ops, .name = "2_2_1"},
526 {.fops = &stsi_2_2_2_fs_ops, .name = "2_2_2"},
527 {.fops = &stsi_3_2_2_fs_ops, .name = "3_2_2"},
528 {.fops = &stsi_15_1_2_fs_ops, .name = "15_1_2"},
529 {.fops = &stsi_15_1_3_fs_ops, .name = "15_1_3"},
530 {.fops = &stsi_15_1_4_fs_ops, .name = "15_1_4"},
531 {.fops = &stsi_15_1_5_fs_ops, .name = "15_1_5"},
532 {.fops = &stsi_15_1_6_fs_ops, .name = "15_1_6"},
533};
534
535static u8 stsi_0_0_0;
536
537static __init int stsi_init_debugfs(void)
538{
539 struct dentry *stsi_root;
540 struct stsi_file *sf;
541 int lvl, i;
542
543 stsi_root = debugfs_create_dir("stsi", arch_debugfs_dir);
544 if (IS_ERR_OR_NULL(stsi_root))
545 return 0;
546 lvl = stsi(NULL, 0, 0, 0);
547 if (lvl > 0)
548 stsi_0_0_0 = lvl;
549 debugfs_create_u8("0_0_0", 0400, stsi_root, &stsi_0_0_0);
550 for (i = 0; i < ARRAY_SIZE(stsi_file); i++) {
551 sf = &stsi_file[i];
552 debugfs_create_file(sf->name, 0400, stsi_root, NULL, sf->fops);
553 }
554 if (IS_ENABLED(CONFIG_SCHED_TOPOLOGY) && MACHINE_HAS_TOPOLOGY) {
555 char link_to[10];
556
557 sprintf(link_to, "15_1_%d", topology_mnest_limit());
558 debugfs_create_symlink("topology", stsi_root, link_to);
559 }
560 return 0;
561}
562device_initcall(stsi_init_debugfs);
563
564#endif
565