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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright IBM Corp. 2001, 2009
4 * Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>,
6 */
7
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 * stsi - store system information
47 *
48 * Returns the current configuration level if function code 0 was specified.
49 * Otherwise returns 0 on success or a negative value on error.
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: /* EBCDIC */
66 EBCASC(name, len);
67 break;
68 case 2: /* UTF-8 */
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 * Sigh: the model field has been renamed with System z9
96 * to model_capacity and a new model field has been added
97 * after the plant field. To avoid confusing older programs
98 * the "Model:" prints "model_capacity model" or just
99 * "model_capacity" if the model string is empty .
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 * Sigh 2. According to the specification the alternate
177 * capability field is a 32 bit floating point number
178 * if the higher order 8 bits are not zero. Printing
179 * a floating point number in the kernel is a no-no,
180 * always print the number as 32 bit unsigned integer.
181 * The user-space needs to know about the strange
182 * encoding of the alternate cpu capability.
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 sysinfo_open(struct inode *inode, struct file *file)
298{
299 return single_open(file, sysinfo_show, NULL);
300}
301
302static const struct file_operations sysinfo_fops = {
303 .open = sysinfo_open,
304 .read = seq_read,
305 .llseek = seq_lseek,
306 .release = single_release,
307};
308
309static int __init sysinfo_create_proc(void)
310{
311 proc_create("sysinfo", 0444, NULL, &sysinfo_fops);
312 return 0;
313}
314device_initcall(sysinfo_create_proc);
315
316/*
317 * Service levels interface.
318 */
319
320static DECLARE_RWSEM(service_level_sem);
321static LIST_HEAD(service_level_list);
322
323int register_service_level(struct service_level *slr)
324{
325 struct service_level *ptr;
326
327 down_write(&service_level_sem);
328 list_for_each_entry(ptr, &service_level_list, list)
329 if (ptr == slr) {
330 up_write(&service_level_sem);
331 return -EEXIST;
332 }
333 list_add_tail(&slr->list, &service_level_list);
334 up_write(&service_level_sem);
335 return 0;
336}
337EXPORT_SYMBOL(register_service_level);
338
339int unregister_service_level(struct service_level *slr)
340{
341 struct service_level *ptr, *next;
342 int rc = -ENOENT;
343
344 down_write(&service_level_sem);
345 list_for_each_entry_safe(ptr, next, &service_level_list, list) {
346 if (ptr != slr)
347 continue;
348 list_del(&ptr->list);
349 rc = 0;
350 break;
351 }
352 up_write(&service_level_sem);
353 return rc;
354}
355EXPORT_SYMBOL(unregister_service_level);
356
357static void *service_level_start(struct seq_file *m, loff_t *pos)
358{
359 down_read(&service_level_sem);
360 return seq_list_start(&service_level_list, *pos);
361}
362
363static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
364{
365 return seq_list_next(p, &service_level_list, pos);
366}
367
368static void service_level_stop(struct seq_file *m, void *p)
369{
370 up_read(&service_level_sem);
371}
372
373static int service_level_show(struct seq_file *m, void *p)
374{
375 struct service_level *slr;
376
377 slr = list_entry(p, struct service_level, list);
378 slr->seq_print(m, slr);
379 return 0;
380}
381
382static const struct seq_operations service_level_seq_ops = {
383 .start = service_level_start,
384 .next = service_level_next,
385 .stop = service_level_stop,
386 .show = service_level_show
387};
388
389static int service_level_open(struct inode *inode, struct file *file)
390{
391 return seq_open(file, &service_level_seq_ops);
392}
393
394static const struct file_operations service_level_ops = {
395 .open = service_level_open,
396 .read = seq_read,
397 .llseek = seq_lseek,
398 .release = seq_release
399};
400
401static void service_level_vm_print(struct seq_file *m,
402 struct service_level *slr)
403{
404 char *query_buffer, *str;
405
406 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
407 if (!query_buffer)
408 return;
409 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
410 str = strchr(query_buffer, '\n');
411 if (str)
412 *str = 0;
413 seq_printf(m, "VM: %s\n", query_buffer);
414 kfree(query_buffer);
415}
416
417static struct service_level service_level_vm = {
418 .seq_print = service_level_vm_print
419};
420
421static __init int create_proc_service_level(void)
422{
423 proc_create("service_levels", 0, NULL, &service_level_ops);
424 if (MACHINE_IS_VM)
425 register_service_level(&service_level_vm);
426 return 0;
427}
428subsys_initcall(create_proc_service_level);
429
430/*
431 * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
432 */
433void s390_adjust_jiffies(void)
434{
435 struct sysinfo_1_2_2 *info;
436 unsigned long capability;
437 struct kernel_fpu fpu;
438
439 info = (void *) get_zeroed_page(GFP_KERNEL);
440 if (!info)
441 return;
442
443 if (stsi(info, 1, 2, 2) == 0) {
444 /*
445 * Major sigh. The cpu capability encoding is "special".
446 * If the first 9 bits of info->capability are 0 then it
447 * is a 32 bit unsigned integer in the range 0 .. 2^23.
448 * If the first 9 bits are != 0 then it is a 32 bit float.
449 * In addition a lower value indicates a proportionally
450 * higher cpu capacity. Bogomips are the other way round.
451 * To get to a halfway suitable number we divide 1e7
452 * by the cpu capability number. Yes, that means a floating
453 * point division ..
454 */
455 kernel_fpu_begin(&fpu, KERNEL_FPR);
456 asm volatile(
457 " sfpc %3\n"
458 " l %0,%1\n"
459 " tmlh %0,0xff80\n"
460 " jnz 0f\n"
461 " cefbr %%f2,%0\n"
462 " j 1f\n"
463 "0: le %%f2,%1\n"
464 "1: cefbr %%f0,%2\n"
465 " debr %%f0,%%f2\n"
466 " cgebr %0,5,%%f0\n"
467 : "=&d" (capability)
468 : "Q" (info->capability), "d" (10000000), "d" (0)
469 : "cc"
470 );
471 kernel_fpu_end(&fpu, KERNEL_FPR);
472 } else
473 /*
474 * Really old machine without stsi block for basic
475 * cpu information. Report 42.0 bogomips.
476 */
477 capability = 42;
478 loops_per_jiffy = capability * (500000/HZ);
479 free_page((unsigned long) info);
480}
481
482/*
483 * calibrate the delay loop
484 */
485void calibrate_delay(void)
486{
487 s390_adjust_jiffies();
488 /* Print the good old Bogomips line .. */
489 printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
490 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
491 (loops_per_jiffy/(5000/HZ)) % 100);
492}
493
494#ifdef CONFIG_DEBUG_FS
495
496#define STSI_FILE(fc, s1, s2) \
497static int stsi_open_##fc##_##s1##_##s2(struct inode *inode, struct file *file)\
498{ \
499 file->private_data = (void *) get_zeroed_page(GFP_KERNEL); \
500 if (!file->private_data) \
501 return -ENOMEM; \
502 if (stsi(file->private_data, fc, s1, s2)) { \
503 free_page((unsigned long)file->private_data); \
504 file->private_data = NULL; \
505 return -EACCES; \
506 } \
507 return nonseekable_open(inode, file); \
508} \
509 \
510static const struct file_operations stsi_##fc##_##s1##_##s2##_fs_ops = { \
511 .open = stsi_open_##fc##_##s1##_##s2, \
512 .release = stsi_release, \
513 .read = stsi_read, \
514 .llseek = no_llseek, \
515};
516
517static int stsi_release(struct inode *inode, struct file *file)
518{
519 free_page((unsigned long)file->private_data);
520 return 0;
521}
522
523static ssize_t stsi_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
524{
525 return simple_read_from_buffer(buf, size, ppos, file->private_data, PAGE_SIZE);
526}
527
528STSI_FILE( 1, 1, 1);
529STSI_FILE( 1, 2, 1);
530STSI_FILE( 1, 2, 2);
531STSI_FILE( 2, 2, 1);
532STSI_FILE( 2, 2, 2);
533STSI_FILE( 3, 2, 2);
534STSI_FILE(15, 1, 2);
535STSI_FILE(15, 1, 3);
536STSI_FILE(15, 1, 4);
537STSI_FILE(15, 1, 5);
538STSI_FILE(15, 1, 6);
539
540struct stsi_file {
541 const struct file_operations *fops;
542 char *name;
543};
544
545static struct stsi_file stsi_file[] __initdata = {
546 {.fops = &stsi_1_1_1_fs_ops, .name = "1_1_1"},
547 {.fops = &stsi_1_2_1_fs_ops, .name = "1_2_1"},
548 {.fops = &stsi_1_2_2_fs_ops, .name = "1_2_2"},
549 {.fops = &stsi_2_2_1_fs_ops, .name = "2_2_1"},
550 {.fops = &stsi_2_2_2_fs_ops, .name = "2_2_2"},
551 {.fops = &stsi_3_2_2_fs_ops, .name = "3_2_2"},
552 {.fops = &stsi_15_1_2_fs_ops, .name = "15_1_2"},
553 {.fops = &stsi_15_1_3_fs_ops, .name = "15_1_3"},
554 {.fops = &stsi_15_1_4_fs_ops, .name = "15_1_4"},
555 {.fops = &stsi_15_1_5_fs_ops, .name = "15_1_5"},
556 {.fops = &stsi_15_1_6_fs_ops, .name = "15_1_6"},
557};
558
559static u8 stsi_0_0_0;
560
561static __init int stsi_init_debugfs(void)
562{
563 struct dentry *stsi_root;
564 struct stsi_file *sf;
565 int lvl, i;
566
567 stsi_root = debugfs_create_dir("stsi", arch_debugfs_dir);
568 if (IS_ERR_OR_NULL(stsi_root))
569 return 0;
570 lvl = stsi(NULL, 0, 0, 0);
571 if (lvl > 0)
572 stsi_0_0_0 = lvl;
573 debugfs_create_u8("0_0_0", 0400, stsi_root, &stsi_0_0_0);
574 for (i = 0; i < ARRAY_SIZE(stsi_file); i++) {
575 sf = &stsi_file[i];
576 debugfs_create_file(sf->name, 0400, stsi_root, NULL, sf->fops);
577 }
578 if (IS_ENABLED(CONFIG_SCHED_TOPOLOGY) && MACHINE_HAS_TOPOLOGY) {
579 char link_to[10];
580
581 sprintf(link_to, "15_1_%d", topology_mnest_limit());
582 debugfs_create_symlink("topology", stsi_root, link_to);
583 }
584 return 0;
585}
586device_initcall(stsi_init_debugfs);
587
588#endif /* CONFIG_DEBUG_FS */
1/*
2 * Copyright IBM Corp. 2001, 2009
3 * Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
4 * Martin Schwidefsky <schwidefsky@de.ibm.com>,
5 */
6
7#include <linux/kernel.h>
8#include <linux/mm.h>
9#include <linux/proc_fs.h>
10#include <linux/seq_file.h>
11#include <linux/init.h>
12#include <linux/delay.h>
13#include <linux/module.h>
14#include <linux/slab.h>
15#include <asm/ebcdic.h>
16#include <asm/sysinfo.h>
17#include <asm/cpcmd.h>
18#include <asm/topology.h>
19
20/* Sigh, math-emu. Don't ask. */
21#include <asm/sfp-util.h>
22#include <math-emu/soft-fp.h>
23#include <math-emu/single.h>
24
25static inline int stsi_0(void)
26{
27 int rc = stsi(NULL, 0, 0, 0);
28 return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
29}
30
31static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
32{
33 if (stsi(info, 1, 1, 1) == -ENOSYS)
34 return len;
35
36 EBCASC(info->manufacturer, sizeof(info->manufacturer));
37 EBCASC(info->type, sizeof(info->type));
38 EBCASC(info->model, sizeof(info->model));
39 EBCASC(info->sequence, sizeof(info->sequence));
40 EBCASC(info->plant, sizeof(info->plant));
41 EBCASC(info->model_capacity, sizeof(info->model_capacity));
42 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
43 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
44 len += sprintf(page + len, "Manufacturer: %-16.16s\n",
45 info->manufacturer);
46 len += sprintf(page + len, "Type: %-4.4s\n",
47 info->type);
48 if (info->model[0] != '\0')
49 /*
50 * Sigh: the model field has been renamed with System z9
51 * to model_capacity and a new model field has been added
52 * after the plant field. To avoid confusing older programs
53 * the "Model:" prints "model_capacity model" or just
54 * "model_capacity" if the model string is empty .
55 */
56 len += sprintf(page + len,
57 "Model: %-16.16s %-16.16s\n",
58 info->model_capacity, info->model);
59 else
60 len += sprintf(page + len, "Model: %-16.16s\n",
61 info->model_capacity);
62 len += sprintf(page + len, "Sequence Code: %-16.16s\n",
63 info->sequence);
64 len += sprintf(page + len, "Plant: %-4.4s\n",
65 info->plant);
66 len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n",
67 info->model_capacity, *(u32 *) info->model_cap_rating);
68 if (info->model_perm_cap[0] != '\0')
69 len += sprintf(page + len,
70 "Model Perm. Capacity: %-16.16s %08u\n",
71 info->model_perm_cap,
72 *(u32 *) info->model_perm_cap_rating);
73 if (info->model_temp_cap[0] != '\0')
74 len += sprintf(page + len,
75 "Model Temp. Capacity: %-16.16s %08u\n",
76 info->model_temp_cap,
77 *(u32 *) info->model_temp_cap_rating);
78 if (info->cai) {
79 len += sprintf(page + len,
80 "Capacity Adj. Ind.: %d\n",
81 info->cai);
82 len += sprintf(page + len, "Capacity Ch. Reason: %d\n",
83 info->ccr);
84 }
85 return len;
86}
87
88static int stsi_15_1_x(struct sysinfo_15_1_x *info, char *page, int len)
89{
90 static int max_mnest;
91 int i, rc;
92
93 len += sprintf(page + len, "\n");
94 if (!MACHINE_HAS_TOPOLOGY)
95 return len;
96 if (max_mnest) {
97 stsi(info, 15, 1, max_mnest);
98 } else {
99 for (max_mnest = 6; max_mnest > 1; max_mnest--) {
100 rc = stsi(info, 15, 1, max_mnest);
101 if (rc != -ENOSYS)
102 break;
103 }
104 }
105 len += sprintf(page + len, "CPU Topology HW: ");
106 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
107 len += sprintf(page + len, " %d", info->mag[i]);
108 len += sprintf(page + len, "\n");
109#ifdef CONFIG_SCHED_MC
110 store_topology(info);
111 len += sprintf(page + len, "CPU Topology SW: ");
112 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
113 len += sprintf(page + len, " %d", info->mag[i]);
114 len += sprintf(page + len, "\n");
115#endif
116 return len;
117}
118
119static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
120{
121 struct sysinfo_1_2_2_extension *ext;
122 int i;
123
124 if (stsi(info, 1, 2, 2) == -ENOSYS)
125 return len;
126 ext = (struct sysinfo_1_2_2_extension *)
127 ((unsigned long) info + info->acc_offset);
128
129 len += sprintf(page + len, "CPUs Total: %d\n",
130 info->cpus_total);
131 len += sprintf(page + len, "CPUs Configured: %d\n",
132 info->cpus_configured);
133 len += sprintf(page + len, "CPUs Standby: %d\n",
134 info->cpus_standby);
135 len += sprintf(page + len, "CPUs Reserved: %d\n",
136 info->cpus_reserved);
137
138 if (info->format == 1) {
139 /*
140 * Sigh 2. According to the specification the alternate
141 * capability field is a 32 bit floating point number
142 * if the higher order 8 bits are not zero. Printing
143 * a floating point number in the kernel is a no-no,
144 * always print the number as 32 bit unsigned integer.
145 * The user-space needs to know about the strange
146 * encoding of the alternate cpu capability.
147 */
148 len += sprintf(page + len, "Capability: %u %u\n",
149 info->capability, ext->alt_capability);
150 for (i = 2; i <= info->cpus_total; i++)
151 len += sprintf(page + len,
152 "Adjustment %02d-way: %u %u\n",
153 i, info->adjustment[i-2],
154 ext->alt_adjustment[i-2]);
155
156 } else {
157 len += sprintf(page + len, "Capability: %u\n",
158 info->capability);
159 for (i = 2; i <= info->cpus_total; i++)
160 len += sprintf(page + len,
161 "Adjustment %02d-way: %u\n",
162 i, info->adjustment[i-2]);
163 }
164
165 if (info->secondary_capability != 0)
166 len += sprintf(page + len, "Secondary Capability: %d\n",
167 info->secondary_capability);
168 return len;
169}
170
171static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
172{
173 if (stsi(info, 2, 2, 2) == -ENOSYS)
174 return len;
175
176 EBCASC(info->name, sizeof(info->name));
177
178 len += sprintf(page + len, "\n");
179 len += sprintf(page + len, "LPAR Number: %d\n",
180 info->lpar_number);
181
182 len += sprintf(page + len, "LPAR Characteristics: ");
183 if (info->characteristics & LPAR_CHAR_DEDICATED)
184 len += sprintf(page + len, "Dedicated ");
185 if (info->characteristics & LPAR_CHAR_SHARED)
186 len += sprintf(page + len, "Shared ");
187 if (info->characteristics & LPAR_CHAR_LIMITED)
188 len += sprintf(page + len, "Limited ");
189 len += sprintf(page + len, "\n");
190
191 len += sprintf(page + len, "LPAR Name: %-8.8s\n",
192 info->name);
193
194 len += sprintf(page + len, "LPAR Adjustment: %d\n",
195 info->caf);
196
197 len += sprintf(page + len, "LPAR CPUs Total: %d\n",
198 info->cpus_total);
199 len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
200 info->cpus_configured);
201 len += sprintf(page + len, "LPAR CPUs Standby: %d\n",
202 info->cpus_standby);
203 len += sprintf(page + len, "LPAR CPUs Reserved: %d\n",
204 info->cpus_reserved);
205 len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n",
206 info->cpus_dedicated);
207 len += sprintf(page + len, "LPAR CPUs Shared: %d\n",
208 info->cpus_shared);
209 return len;
210}
211
212static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
213{
214 int i;
215
216 if (stsi(info, 3, 2, 2) == -ENOSYS)
217 return len;
218 for (i = 0; i < info->count; i++) {
219 EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
220 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
221 len += sprintf(page + len, "\n");
222 len += sprintf(page + len, "VM%02d Name: %-8.8s\n",
223 i, info->vm[i].name);
224 len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
225 i, info->vm[i].cpi);
226
227 len += sprintf(page + len, "VM%02d Adjustment: %d\n",
228 i, info->vm[i].caf);
229
230 len += sprintf(page + len, "VM%02d CPUs Total: %d\n",
231 i, info->vm[i].cpus_total);
232 len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
233 i, info->vm[i].cpus_configured);
234 len += sprintf(page + len, "VM%02d CPUs Standby: %d\n",
235 i, info->vm[i].cpus_standby);
236 len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n",
237 i, info->vm[i].cpus_reserved);
238 }
239 return len;
240}
241
242static int proc_read_sysinfo(char *page, char **start,
243 off_t off, int count,
244 int *eof, void *data)
245{
246 unsigned long info = get_zeroed_page(GFP_KERNEL);
247 int level, len;
248
249 if (!info)
250 return 0;
251
252 len = 0;
253 level = stsi_0();
254 if (level >= 1)
255 len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);
256
257 if (level >= 1)
258 len = stsi_15_1_x((struct sysinfo_15_1_x *) info, page, len);
259
260 if (level >= 1)
261 len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
262
263 if (level >= 2)
264 len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
265
266 if (level >= 3)
267 len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
268
269 free_page(info);
270 return len;
271}
272
273static __init int create_proc_sysinfo(void)
274{
275 create_proc_read_entry("sysinfo", 0444, NULL,
276 proc_read_sysinfo, NULL);
277 return 0;
278}
279device_initcall(create_proc_sysinfo);
280
281/*
282 * Service levels interface.
283 */
284
285static DECLARE_RWSEM(service_level_sem);
286static LIST_HEAD(service_level_list);
287
288int register_service_level(struct service_level *slr)
289{
290 struct service_level *ptr;
291
292 down_write(&service_level_sem);
293 list_for_each_entry(ptr, &service_level_list, list)
294 if (ptr == slr) {
295 up_write(&service_level_sem);
296 return -EEXIST;
297 }
298 list_add_tail(&slr->list, &service_level_list);
299 up_write(&service_level_sem);
300 return 0;
301}
302EXPORT_SYMBOL(register_service_level);
303
304int unregister_service_level(struct service_level *slr)
305{
306 struct service_level *ptr, *next;
307 int rc = -ENOENT;
308
309 down_write(&service_level_sem);
310 list_for_each_entry_safe(ptr, next, &service_level_list, list) {
311 if (ptr != slr)
312 continue;
313 list_del(&ptr->list);
314 rc = 0;
315 break;
316 }
317 up_write(&service_level_sem);
318 return rc;
319}
320EXPORT_SYMBOL(unregister_service_level);
321
322static void *service_level_start(struct seq_file *m, loff_t *pos)
323{
324 down_read(&service_level_sem);
325 return seq_list_start(&service_level_list, *pos);
326}
327
328static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
329{
330 return seq_list_next(p, &service_level_list, pos);
331}
332
333static void service_level_stop(struct seq_file *m, void *p)
334{
335 up_read(&service_level_sem);
336}
337
338static int service_level_show(struct seq_file *m, void *p)
339{
340 struct service_level *slr;
341
342 slr = list_entry(p, struct service_level, list);
343 slr->seq_print(m, slr);
344 return 0;
345}
346
347static const struct seq_operations service_level_seq_ops = {
348 .start = service_level_start,
349 .next = service_level_next,
350 .stop = service_level_stop,
351 .show = service_level_show
352};
353
354static int service_level_open(struct inode *inode, struct file *file)
355{
356 return seq_open(file, &service_level_seq_ops);
357}
358
359static const struct file_operations service_level_ops = {
360 .open = service_level_open,
361 .read = seq_read,
362 .llseek = seq_lseek,
363 .release = seq_release
364};
365
366static void service_level_vm_print(struct seq_file *m,
367 struct service_level *slr)
368{
369 char *query_buffer, *str;
370
371 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
372 if (!query_buffer)
373 return;
374 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
375 str = strchr(query_buffer, '\n');
376 if (str)
377 *str = 0;
378 seq_printf(m, "VM: %s\n", query_buffer);
379 kfree(query_buffer);
380}
381
382static struct service_level service_level_vm = {
383 .seq_print = service_level_vm_print
384};
385
386static __init int create_proc_service_level(void)
387{
388 proc_create("service_levels", 0, NULL, &service_level_ops);
389 if (MACHINE_IS_VM)
390 register_service_level(&service_level_vm);
391 return 0;
392}
393subsys_initcall(create_proc_service_level);
394
395/*
396 * Bogomips calculation based on cpu capability.
397 */
398int get_cpu_capability(unsigned int *capability)
399{
400 struct sysinfo_1_2_2 *info;
401 int rc;
402
403 info = (void *) get_zeroed_page(GFP_KERNEL);
404 if (!info)
405 return -ENOMEM;
406 rc = stsi(info, 1, 2, 2);
407 if (rc == -ENOSYS)
408 goto out;
409 rc = 0;
410 *capability = info->capability;
411out:
412 free_page((unsigned long) info);
413 return rc;
414}
415
416/*
417 * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
418 */
419void s390_adjust_jiffies(void)
420{
421 struct sysinfo_1_2_2 *info;
422 const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
423 FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
424 FP_DECL_EX;
425 unsigned int capability;
426
427 info = (void *) get_zeroed_page(GFP_KERNEL);
428 if (!info)
429 return;
430
431 if (stsi(info, 1, 2, 2) != -ENOSYS) {
432 /*
433 * Major sigh. The cpu capability encoding is "special".
434 * If the first 9 bits of info->capability are 0 then it
435 * is a 32 bit unsigned integer in the range 0 .. 2^23.
436 * If the first 9 bits are != 0 then it is a 32 bit float.
437 * In addition a lower value indicates a proportionally
438 * higher cpu capacity. Bogomips are the other way round.
439 * To get to a halfway suitable number we divide 1e7
440 * by the cpu capability number. Yes, that means a floating
441 * point division .. math-emu here we come :-)
442 */
443 FP_UNPACK_SP(SA, &fmil);
444 if ((info->capability >> 23) == 0)
445 FP_FROM_INT_S(SB, info->capability, 32, int);
446 else
447 FP_UNPACK_SP(SB, &info->capability);
448 FP_DIV_S(SR, SA, SB);
449 FP_TO_INT_S(capability, SR, 32, 0);
450 } else
451 /*
452 * Really old machine without stsi block for basic
453 * cpu information. Report 42.0 bogomips.
454 */
455 capability = 42;
456 loops_per_jiffy = capability * (500000/HZ);
457 free_page((unsigned long) info);
458}
459
460/*
461 * calibrate the delay loop
462 */
463void __cpuinit calibrate_delay(void)
464{
465 s390_adjust_jiffies();
466 /* Print the good old Bogomips line .. */
467 printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
468 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
469 (loops_per_jiffy/(5000/HZ)) % 100);
470}