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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/asm-extable.h>
18#include <asm/ebcdic.h>
19#include <asm/debug.h>
20#include <asm/sysinfo.h>
21#include <asm/cpcmd.h>
22#include <asm/topology.h>
23#include <asm/fpu/api.h>
24
25int topology_max_mnest;
26
27static inline int __stsi(void *sysinfo, int fc, int sel1, int sel2, int *lvl)
28{
29 int r0 = (fc << 28) | sel1;
30 int rc = 0;
31
32 asm volatile(
33 " lr 0,%[r0]\n"
34 " lr 1,%[r1]\n"
35 " stsi 0(%[sysinfo])\n"
36 "0: jz 2f\n"
37 "1: lhi %[rc],%[retval]\n"
38 "2: lr %[r0],0\n"
39 EX_TABLE(0b, 1b)
40 : [r0] "+d" (r0), [rc] "+d" (rc)
41 : [r1] "d" (sel2),
42 [sysinfo] "a" (sysinfo),
43 [retval] "K" (-EOPNOTSUPP)
44 : "cc", "0", "1", "memory");
45 *lvl = ((unsigned int) r0) >> 28;
46 return rc;
47}
48
49/*
50 * stsi - store system information
51 *
52 * Returns the current configuration level if function code 0 was specified.
53 * Otherwise returns 0 on success or a negative value on error.
54 */
55int stsi(void *sysinfo, int fc, int sel1, int sel2)
56{
57 int lvl, rc;
58
59 rc = __stsi(sysinfo, fc, sel1, sel2, &lvl);
60 if (rc)
61 return rc;
62 return fc ? 0 : lvl;
63}
64EXPORT_SYMBOL(stsi);
65
66#ifdef CONFIG_PROC_FS
67
68static bool convert_ext_name(unsigned char encoding, char *name, size_t len)
69{
70 switch (encoding) {
71 case 1: /* EBCDIC */
72 EBCASC(name, len);
73 break;
74 case 2: /* UTF-8 */
75 break;
76 default:
77 return false;
78 }
79 return true;
80}
81
82static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info)
83{
84 int i;
85
86 if (stsi(info, 1, 1, 1))
87 return;
88 EBCASC(info->manufacturer, sizeof(info->manufacturer));
89 EBCASC(info->type, sizeof(info->type));
90 EBCASC(info->model, sizeof(info->model));
91 EBCASC(info->sequence, sizeof(info->sequence));
92 EBCASC(info->plant, sizeof(info->plant));
93 EBCASC(info->model_capacity, sizeof(info->model_capacity));
94 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
95 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
96 seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer);
97 seq_printf(m, "Type: %-4.4s\n", info->type);
98 if (info->lic)
99 seq_printf(m, "LIC Identifier: %016lx\n", info->lic);
100 /*
101 * Sigh: the model field has been renamed with System z9
102 * to model_capacity and a new model field has been added
103 * after the plant field. To avoid confusing older programs
104 * the "Model:" prints "model_capacity model" or just
105 * "model_capacity" if the model string is empty .
106 */
107 seq_printf(m, "Model: %-16.16s", info->model_capacity);
108 if (info->model[0] != '\0')
109 seq_printf(m, " %-16.16s", info->model);
110 seq_putc(m, '\n');
111 seq_printf(m, "Sequence Code: %-16.16s\n", info->sequence);
112 seq_printf(m, "Plant: %-4.4s\n", info->plant);
113 seq_printf(m, "Model Capacity: %-16.16s %08u\n",
114 info->model_capacity, info->model_cap_rating);
115 if (info->model_perm_cap_rating)
116 seq_printf(m, "Model Perm. Capacity: %-16.16s %08u\n",
117 info->model_perm_cap,
118 info->model_perm_cap_rating);
119 if (info->model_temp_cap_rating)
120 seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n",
121 info->model_temp_cap,
122 info->model_temp_cap_rating);
123 if (info->ncr)
124 seq_printf(m, "Nominal Cap. Rating: %08u\n", info->ncr);
125 if (info->npr)
126 seq_printf(m, "Nominal Perm. Rating: %08u\n", info->npr);
127 if (info->ntr)
128 seq_printf(m, "Nominal Temp. Rating: %08u\n", info->ntr);
129 if (info->cai) {
130 seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai);
131 seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr);
132 seq_printf(m, "Capacity Transient: %d\n", info->t);
133 }
134 if (info->p) {
135 for (i = 1; i <= ARRAY_SIZE(info->typepct); i++) {
136 seq_printf(m, "Type %d Percentage: %d\n",
137 i, info->typepct[i - 1]);
138 }
139 }
140}
141
142static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info)
143{
144 int i;
145
146 seq_putc(m, '\n');
147 if (!MACHINE_HAS_TOPOLOGY)
148 return;
149 if (stsi(info, 15, 1, topology_max_mnest))
150 return;
151 seq_printf(m, "CPU Topology HW: ");
152 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
153 seq_printf(m, " %d", info->mag[i]);
154 seq_putc(m, '\n');
155#ifdef CONFIG_SCHED_TOPOLOGY
156 store_topology(info);
157 seq_printf(m, "CPU Topology SW: ");
158 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
159 seq_printf(m, " %d", info->mag[i]);
160 seq_putc(m, '\n');
161#endif
162}
163
164static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info)
165{
166 struct sysinfo_1_2_2_extension *ext;
167 int i;
168
169 if (stsi(info, 1, 2, 2))
170 return;
171 ext = (struct sysinfo_1_2_2_extension *)
172 ((unsigned long) info + info->acc_offset);
173 seq_printf(m, "CPUs Total: %d\n", info->cpus_total);
174 seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured);
175 seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby);
176 seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved);
177 if (info->mt_installed) {
178 seq_printf(m, "CPUs G-MTID: %d\n", info->mt_gtid);
179 seq_printf(m, "CPUs S-MTID: %d\n", info->mt_stid);
180 }
181 /*
182 * Sigh 2. According to the specification the alternate
183 * capability field is a 32 bit floating point number
184 * if the higher order 8 bits are not zero. Printing
185 * a floating point number in the kernel is a no-no,
186 * always print the number as 32 bit unsigned integer.
187 * The user-space needs to know about the strange
188 * encoding of the alternate cpu capability.
189 */
190 seq_printf(m, "Capability: %u", info->capability);
191 if (info->format == 1)
192 seq_printf(m, " %u", ext->alt_capability);
193 seq_putc(m, '\n');
194 if (info->nominal_cap)
195 seq_printf(m, "Nominal Capability: %d\n", info->nominal_cap);
196 if (info->secondary_cap)
197 seq_printf(m, "Secondary Capability: %d\n", info->secondary_cap);
198 for (i = 2; i <= info->cpus_total; i++) {
199 seq_printf(m, "Adjustment %02d-way: %u",
200 i, info->adjustment[i-2]);
201 if (info->format == 1)
202 seq_printf(m, " %u", ext->alt_adjustment[i-2]);
203 seq_putc(m, '\n');
204 }
205}
206
207static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info)
208{
209 if (stsi(info, 2, 2, 2))
210 return;
211 EBCASC(info->name, sizeof(info->name));
212 seq_putc(m, '\n');
213 seq_printf(m, "LPAR Number: %d\n", info->lpar_number);
214 seq_printf(m, "LPAR Characteristics: ");
215 if (info->characteristics & LPAR_CHAR_DEDICATED)
216 seq_printf(m, "Dedicated ");
217 if (info->characteristics & LPAR_CHAR_SHARED)
218 seq_printf(m, "Shared ");
219 if (info->characteristics & LPAR_CHAR_LIMITED)
220 seq_printf(m, "Limited ");
221 seq_putc(m, '\n');
222 seq_printf(m, "LPAR Name: %-8.8s\n", info->name);
223 seq_printf(m, "LPAR Adjustment: %d\n", info->caf);
224 seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total);
225 seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured);
226 seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby);
227 seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved);
228 seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated);
229 seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared);
230 if (info->mt_installed) {
231 seq_printf(m, "LPAR CPUs G-MTID: %d\n", info->mt_gtid);
232 seq_printf(m, "LPAR CPUs S-MTID: %d\n", info->mt_stid);
233 seq_printf(m, "LPAR CPUs PS-MTID: %d\n", info->mt_psmtid);
234 }
235 if (convert_ext_name(info->vsne, info->ext_name, sizeof(info->ext_name))) {
236 seq_printf(m, "LPAR Extended Name: %-.256s\n", info->ext_name);
237 seq_printf(m, "LPAR UUID: %pUb\n", &info->uuid);
238 }
239}
240
241static void print_ext_name(struct seq_file *m, int lvl,
242 struct sysinfo_3_2_2 *info)
243{
244 size_t len = sizeof(info->ext_names[lvl]);
245
246 if (!convert_ext_name(info->vm[lvl].evmne, info->ext_names[lvl], len))
247 return;
248 seq_printf(m, "VM%02d Extended Name: %-.256s\n", lvl,
249 info->ext_names[lvl]);
250}
251
252static void print_uuid(struct seq_file *m, int i, struct sysinfo_3_2_2 *info)
253{
254 if (uuid_is_null(&info->vm[i].uuid))
255 return;
256 seq_printf(m, "VM%02d UUID: %pUb\n", i, &info->vm[i].uuid);
257}
258
259static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info)
260{
261 int i;
262
263 if (stsi(info, 3, 2, 2))
264 return;
265 for (i = 0; i < info->count; i++) {
266 EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
267 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
268 seq_putc(m, '\n');
269 seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name);
270 seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi);
271 seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf);
272 seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total);
273 seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured);
274 seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby);
275 seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved);
276 print_ext_name(m, i, info);
277 print_uuid(m, i, info);
278 }
279}
280
281static int sysinfo_show(struct seq_file *m, void *v)
282{
283 void *info = (void *)get_zeroed_page(GFP_KERNEL);
284 int level;
285
286 if (!info)
287 return 0;
288 level = stsi(NULL, 0, 0, 0);
289 if (level >= 1)
290 stsi_1_1_1(m, info);
291 if (level >= 1)
292 stsi_15_1_x(m, info);
293 if (level >= 1)
294 stsi_1_2_2(m, info);
295 if (level >= 2)
296 stsi_2_2_2(m, info);
297 if (level >= 3)
298 stsi_3_2_2(m, info);
299 free_page((unsigned long)info);
300 return 0;
301}
302
303static int __init sysinfo_create_proc(void)
304{
305 proc_create_single("sysinfo", 0444, NULL, sysinfo_show);
306 return 0;
307}
308device_initcall(sysinfo_create_proc);
309
310#endif /* CONFIG_PROC_FS */
311
312/*
313 * Service levels interface.
314 */
315
316static DECLARE_RWSEM(service_level_sem);
317static LIST_HEAD(service_level_list);
318
319int register_service_level(struct service_level *slr)
320{
321 struct service_level *ptr;
322
323 down_write(&service_level_sem);
324 list_for_each_entry(ptr, &service_level_list, list)
325 if (ptr == slr) {
326 up_write(&service_level_sem);
327 return -EEXIST;
328 }
329 list_add_tail(&slr->list, &service_level_list);
330 up_write(&service_level_sem);
331 return 0;
332}
333EXPORT_SYMBOL(register_service_level);
334
335int unregister_service_level(struct service_level *slr)
336{
337 struct service_level *ptr, *next;
338 int rc = -ENOENT;
339
340 down_write(&service_level_sem);
341 list_for_each_entry_safe(ptr, next, &service_level_list, list) {
342 if (ptr != slr)
343 continue;
344 list_del(&ptr->list);
345 rc = 0;
346 break;
347 }
348 up_write(&service_level_sem);
349 return rc;
350}
351EXPORT_SYMBOL(unregister_service_level);
352
353static void *service_level_start(struct seq_file *m, loff_t *pos)
354{
355 down_read(&service_level_sem);
356 return seq_list_start(&service_level_list, *pos);
357}
358
359static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
360{
361 return seq_list_next(p, &service_level_list, pos);
362}
363
364static void service_level_stop(struct seq_file *m, void *p)
365{
366 up_read(&service_level_sem);
367}
368
369static int service_level_show(struct seq_file *m, void *p)
370{
371 struct service_level *slr;
372
373 slr = list_entry(p, struct service_level, list);
374 slr->seq_print(m, slr);
375 return 0;
376}
377
378static const struct seq_operations service_level_seq_ops = {
379 .start = service_level_start,
380 .next = service_level_next,
381 .stop = service_level_stop,
382 .show = service_level_show
383};
384
385static void service_level_vm_print(struct seq_file *m,
386 struct service_level *slr)
387{
388 char *query_buffer, *str;
389
390 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
391 if (!query_buffer)
392 return;
393 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
394 str = strchr(query_buffer, '\n');
395 if (str)
396 *str = 0;
397 seq_printf(m, "VM: %s\n", query_buffer);
398 kfree(query_buffer);
399}
400
401static struct service_level service_level_vm = {
402 .seq_print = service_level_vm_print
403};
404
405static __init int create_proc_service_level(void)
406{
407 proc_create_seq("service_levels", 0, NULL, &service_level_seq_ops);
408 if (MACHINE_IS_VM)
409 register_service_level(&service_level_vm);
410 return 0;
411}
412subsys_initcall(create_proc_service_level);
413
414/*
415 * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
416 */
417void s390_adjust_jiffies(void)
418{
419 struct sysinfo_1_2_2 *info;
420 unsigned long capability;
421 struct kernel_fpu fpu;
422
423 info = (void *) get_zeroed_page(GFP_KERNEL);
424 if (!info)
425 return;
426
427 if (stsi(info, 1, 2, 2) == 0) {
428 /*
429 * Major sigh. The cpu capability encoding is "special".
430 * If the first 9 bits of info->capability are 0 then it
431 * is a 32 bit unsigned integer in the range 0 .. 2^23.
432 * If the first 9 bits are != 0 then it is a 32 bit float.
433 * In addition a lower value indicates a proportionally
434 * higher cpu capacity. Bogomips are the other way round.
435 * To get to a halfway suitable number we divide 1e7
436 * by the cpu capability number. Yes, that means a floating
437 * point division ..
438 */
439 kernel_fpu_begin(&fpu, KERNEL_FPR);
440 asm volatile(
441 " sfpc %3\n"
442 " l %0,%1\n"
443 " tmlh %0,0xff80\n"
444 " jnz 0f\n"
445 " cefbr %%f2,%0\n"
446 " j 1f\n"
447 "0: le %%f2,%1\n"
448 "1: cefbr %%f0,%2\n"
449 " debr %%f0,%%f2\n"
450 " cgebr %0,5,%%f0\n"
451 : "=&d" (capability)
452 : "Q" (info->capability), "d" (10000000), "d" (0)
453 : "cc"
454 );
455 kernel_fpu_end(&fpu, KERNEL_FPR);
456 } else
457 /*
458 * Really old machine without stsi block for basic
459 * cpu information. Report 42.0 bogomips.
460 */
461 capability = 42;
462 loops_per_jiffy = capability * (500000/HZ);
463 free_page((unsigned long) info);
464}
465
466/*
467 * calibrate the delay loop
468 */
469void calibrate_delay(void)
470{
471 s390_adjust_jiffies();
472 /* Print the good old Bogomips line .. */
473 printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
474 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
475 (loops_per_jiffy/(5000/HZ)) % 100);
476}
477
478#ifdef CONFIG_DEBUG_FS
479
480#define STSI_FILE(fc, s1, s2) \
481static int stsi_open_##fc##_##s1##_##s2(struct inode *inode, struct file *file)\
482{ \
483 file->private_data = (void *) get_zeroed_page(GFP_KERNEL); \
484 if (!file->private_data) \
485 return -ENOMEM; \
486 if (stsi(file->private_data, fc, s1, s2)) { \
487 free_page((unsigned long)file->private_data); \
488 file->private_data = NULL; \
489 return -EACCES; \
490 } \
491 return nonseekable_open(inode, file); \
492} \
493 \
494static const struct file_operations stsi_##fc##_##s1##_##s2##_fs_ops = { \
495 .open = stsi_open_##fc##_##s1##_##s2, \
496 .release = stsi_release, \
497 .read = stsi_read, \
498 .llseek = no_llseek, \
499};
500
501static int stsi_release(struct inode *inode, struct file *file)
502{
503 free_page((unsigned long)file->private_data);
504 return 0;
505}
506
507static ssize_t stsi_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
508{
509 return simple_read_from_buffer(buf, size, ppos, file->private_data, PAGE_SIZE);
510}
511
512STSI_FILE( 1, 1, 1);
513STSI_FILE( 1, 2, 1);
514STSI_FILE( 1, 2, 2);
515STSI_FILE( 2, 2, 1);
516STSI_FILE( 2, 2, 2);
517STSI_FILE( 3, 2, 2);
518STSI_FILE(15, 1, 2);
519STSI_FILE(15, 1, 3);
520STSI_FILE(15, 1, 4);
521STSI_FILE(15, 1, 5);
522STSI_FILE(15, 1, 6);
523
524struct stsi_file {
525 const struct file_operations *fops;
526 char *name;
527};
528
529static struct stsi_file stsi_file[] __initdata = {
530 {.fops = &stsi_1_1_1_fs_ops, .name = "1_1_1"},
531 {.fops = &stsi_1_2_1_fs_ops, .name = "1_2_1"},
532 {.fops = &stsi_1_2_2_fs_ops, .name = "1_2_2"},
533 {.fops = &stsi_2_2_1_fs_ops, .name = "2_2_1"},
534 {.fops = &stsi_2_2_2_fs_ops, .name = "2_2_2"},
535 {.fops = &stsi_3_2_2_fs_ops, .name = "3_2_2"},
536 {.fops = &stsi_15_1_2_fs_ops, .name = "15_1_2"},
537 {.fops = &stsi_15_1_3_fs_ops, .name = "15_1_3"},
538 {.fops = &stsi_15_1_4_fs_ops, .name = "15_1_4"},
539 {.fops = &stsi_15_1_5_fs_ops, .name = "15_1_5"},
540 {.fops = &stsi_15_1_6_fs_ops, .name = "15_1_6"},
541};
542
543static u8 stsi_0_0_0;
544
545static __init int stsi_init_debugfs(void)
546{
547 struct dentry *stsi_root;
548 struct stsi_file *sf;
549 int lvl, i;
550
551 stsi_root = debugfs_create_dir("stsi", arch_debugfs_dir);
552 lvl = stsi(NULL, 0, 0, 0);
553 if (lvl > 0)
554 stsi_0_0_0 = lvl;
555 debugfs_create_u8("0_0_0", 0400, stsi_root, &stsi_0_0_0);
556 for (i = 0; i < ARRAY_SIZE(stsi_file); i++) {
557 sf = &stsi_file[i];
558 debugfs_create_file(sf->name, 0400, stsi_root, NULL, sf->fops);
559 }
560 if (IS_ENABLED(CONFIG_SCHED_TOPOLOGY) && MACHINE_HAS_TOPOLOGY) {
561 char link_to[10];
562
563 sprintf(link_to, "15_1_%d", topology_mnest_limit());
564 debugfs_create_symlink("topology", stsi_root, link_to);
565 }
566 return 0;
567}
568device_initcall(stsi_init_debugfs);
569
570#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
25int topology_max_mnest;
26
27/*
28 * stsi - store system information
29 *
30 * Returns the current configuration level if function code 0 was specified.
31 * Otherwise returns 0 on success or a negative value on error.
32 */
33int stsi(void *sysinfo, int fc, int sel1, int sel2)
34{
35 register int r0 asm("0") = (fc << 28) | sel1;
36 register int r1 asm("1") = sel2;
37 int rc = 0;
38
39 asm volatile(
40 " stsi 0(%3)\n"
41 "0: jz 2f\n"
42 "1: lhi %1,%4\n"
43 "2:\n"
44 EX_TABLE(0b, 1b)
45 : "+d" (r0), "+d" (rc)
46 : "d" (r1), "a" (sysinfo), "K" (-EOPNOTSUPP)
47 : "cc", "memory");
48 if (rc)
49 return rc;
50 return fc ? 0 : ((unsigned int) r0) >> 28;
51}
52EXPORT_SYMBOL(stsi);
53
54static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info)
55{
56 int i;
57
58 if (stsi(info, 1, 1, 1))
59 return;
60 EBCASC(info->manufacturer, sizeof(info->manufacturer));
61 EBCASC(info->type, sizeof(info->type));
62 EBCASC(info->model, sizeof(info->model));
63 EBCASC(info->sequence, sizeof(info->sequence));
64 EBCASC(info->plant, sizeof(info->plant));
65 EBCASC(info->model_capacity, sizeof(info->model_capacity));
66 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
67 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
68 seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer);
69 seq_printf(m, "Type: %-4.4s\n", info->type);
70 /*
71 * Sigh: the model field has been renamed with System z9
72 * to model_capacity and a new model field has been added
73 * after the plant field. To avoid confusing older programs
74 * the "Model:" prints "model_capacity model" or just
75 * "model_capacity" if the model string is empty .
76 */
77 seq_printf(m, "Model: %-16.16s", info->model_capacity);
78 if (info->model[0] != '\0')
79 seq_printf(m, " %-16.16s", info->model);
80 seq_putc(m, '\n');
81 seq_printf(m, "Sequence Code: %-16.16s\n", info->sequence);
82 seq_printf(m, "Plant: %-4.4s\n", info->plant);
83 seq_printf(m, "Model Capacity: %-16.16s %08u\n",
84 info->model_capacity, info->model_cap_rating);
85 if (info->model_perm_cap_rating)
86 seq_printf(m, "Model Perm. Capacity: %-16.16s %08u\n",
87 info->model_perm_cap,
88 info->model_perm_cap_rating);
89 if (info->model_temp_cap_rating)
90 seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n",
91 info->model_temp_cap,
92 info->model_temp_cap_rating);
93 if (info->ncr)
94 seq_printf(m, "Nominal Cap. Rating: %08u\n", info->ncr);
95 if (info->npr)
96 seq_printf(m, "Nominal Perm. Rating: %08u\n", info->npr);
97 if (info->ntr)
98 seq_printf(m, "Nominal Temp. Rating: %08u\n", info->ntr);
99 if (info->cai) {
100 seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai);
101 seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr);
102 seq_printf(m, "Capacity Transient: %d\n", info->t);
103 }
104 if (info->p) {
105 for (i = 1; i <= ARRAY_SIZE(info->typepct); i++) {
106 seq_printf(m, "Type %d Percentage: %d\n",
107 i, info->typepct[i - 1]);
108 }
109 }
110}
111
112static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info)
113{
114 int i;
115
116 seq_putc(m, '\n');
117 if (!MACHINE_HAS_TOPOLOGY)
118 return;
119 if (stsi(info, 15, 1, topology_max_mnest))
120 return;
121 seq_printf(m, "CPU Topology HW: ");
122 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
123 seq_printf(m, " %d", info->mag[i]);
124 seq_putc(m, '\n');
125#ifdef CONFIG_SCHED_TOPOLOGY
126 store_topology(info);
127 seq_printf(m, "CPU Topology SW: ");
128 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
129 seq_printf(m, " %d", info->mag[i]);
130 seq_putc(m, '\n');
131#endif
132}
133
134static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info)
135{
136 struct sysinfo_1_2_2_extension *ext;
137 int i;
138
139 if (stsi(info, 1, 2, 2))
140 return;
141 ext = (struct sysinfo_1_2_2_extension *)
142 ((unsigned long) info + info->acc_offset);
143 seq_printf(m, "CPUs Total: %d\n", info->cpus_total);
144 seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured);
145 seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby);
146 seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved);
147 if (info->mt_installed) {
148 seq_printf(m, "CPUs G-MTID: %d\n", info->mt_gtid);
149 seq_printf(m, "CPUs S-MTID: %d\n", info->mt_stid);
150 }
151 /*
152 * Sigh 2. According to the specification the alternate
153 * capability field is a 32 bit floating point number
154 * if the higher order 8 bits are not zero. Printing
155 * a floating point number in the kernel is a no-no,
156 * always print the number as 32 bit unsigned integer.
157 * The user-space needs to know about the strange
158 * encoding of the alternate cpu capability.
159 */
160 seq_printf(m, "Capability: %u", info->capability);
161 if (info->format == 1)
162 seq_printf(m, " %u", ext->alt_capability);
163 seq_putc(m, '\n');
164 if (info->nominal_cap)
165 seq_printf(m, "Nominal Capability: %d\n", info->nominal_cap);
166 if (info->secondary_cap)
167 seq_printf(m, "Secondary Capability: %d\n", info->secondary_cap);
168 for (i = 2; i <= info->cpus_total; i++) {
169 seq_printf(m, "Adjustment %02d-way: %u",
170 i, info->adjustment[i-2]);
171 if (info->format == 1)
172 seq_printf(m, " %u", ext->alt_adjustment[i-2]);
173 seq_putc(m, '\n');
174 }
175}
176
177static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info)
178{
179 if (stsi(info, 2, 2, 2))
180 return;
181 EBCASC(info->name, sizeof(info->name));
182 seq_putc(m, '\n');
183 seq_printf(m, "LPAR Number: %d\n", info->lpar_number);
184 seq_printf(m, "LPAR Characteristics: ");
185 if (info->characteristics & LPAR_CHAR_DEDICATED)
186 seq_printf(m, "Dedicated ");
187 if (info->characteristics & LPAR_CHAR_SHARED)
188 seq_printf(m, "Shared ");
189 if (info->characteristics & LPAR_CHAR_LIMITED)
190 seq_printf(m, "Limited ");
191 seq_putc(m, '\n');
192 seq_printf(m, "LPAR Name: %-8.8s\n", info->name);
193 seq_printf(m, "LPAR Adjustment: %d\n", info->caf);
194 seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total);
195 seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured);
196 seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby);
197 seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved);
198 seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated);
199 seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared);
200 if (info->mt_installed) {
201 seq_printf(m, "LPAR CPUs G-MTID: %d\n", info->mt_gtid);
202 seq_printf(m, "LPAR CPUs S-MTID: %d\n", info->mt_stid);
203 seq_printf(m, "LPAR CPUs PS-MTID: %d\n", info->mt_psmtid);
204 }
205}
206
207static void print_ext_name(struct seq_file *m, int lvl,
208 struct sysinfo_3_2_2 *info)
209{
210 if (info->vm[lvl].ext_name_encoding == 0)
211 return;
212 if (info->ext_names[lvl][0] == 0)
213 return;
214 switch (info->vm[lvl].ext_name_encoding) {
215 case 1: /* EBCDIC */
216 EBCASC(info->ext_names[lvl], sizeof(info->ext_names[lvl]));
217 break;
218 case 2: /* UTF-8 */
219 break;
220 default:
221 return;
222 }
223 seq_printf(m, "VM%02d Extended Name: %-.256s\n", lvl,
224 info->ext_names[lvl]);
225}
226
227static void print_uuid(struct seq_file *m, int i, struct sysinfo_3_2_2 *info)
228{
229 if (!memcmp(&info->vm[i].uuid, &NULL_UUID_BE, sizeof(uuid_be)))
230 return;
231 seq_printf(m, "VM%02d UUID: %pUb\n", i, &info->vm[i].uuid);
232}
233
234static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info)
235{
236 int i;
237
238 if (stsi(info, 3, 2, 2))
239 return;
240 for (i = 0; i < info->count; i++) {
241 EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
242 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
243 seq_putc(m, '\n');
244 seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name);
245 seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi);
246 seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf);
247 seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total);
248 seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured);
249 seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby);
250 seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved);
251 print_ext_name(m, i, info);
252 print_uuid(m, i, info);
253 }
254}
255
256static int sysinfo_show(struct seq_file *m, void *v)
257{
258 void *info = (void *)get_zeroed_page(GFP_KERNEL);
259 int level;
260
261 if (!info)
262 return 0;
263 level = stsi(NULL, 0, 0, 0);
264 if (level >= 1)
265 stsi_1_1_1(m, info);
266 if (level >= 1)
267 stsi_15_1_x(m, info);
268 if (level >= 1)
269 stsi_1_2_2(m, info);
270 if (level >= 2)
271 stsi_2_2_2(m, info);
272 if (level >= 3)
273 stsi_3_2_2(m, info);
274 free_page((unsigned long)info);
275 return 0;
276}
277
278static int sysinfo_open(struct inode *inode, struct file *file)
279{
280 return single_open(file, sysinfo_show, NULL);
281}
282
283static const struct file_operations sysinfo_fops = {
284 .open = sysinfo_open,
285 .read = seq_read,
286 .llseek = seq_lseek,
287 .release = single_release,
288};
289
290static int __init sysinfo_create_proc(void)
291{
292 proc_create("sysinfo", 0444, NULL, &sysinfo_fops);
293 return 0;
294}
295device_initcall(sysinfo_create_proc);
296
297/*
298 * Service levels interface.
299 */
300
301static DECLARE_RWSEM(service_level_sem);
302static LIST_HEAD(service_level_list);
303
304int register_service_level(struct service_level *slr)
305{
306 struct service_level *ptr;
307
308 down_write(&service_level_sem);
309 list_for_each_entry(ptr, &service_level_list, list)
310 if (ptr == slr) {
311 up_write(&service_level_sem);
312 return -EEXIST;
313 }
314 list_add_tail(&slr->list, &service_level_list);
315 up_write(&service_level_sem);
316 return 0;
317}
318EXPORT_SYMBOL(register_service_level);
319
320int unregister_service_level(struct service_level *slr)
321{
322 struct service_level *ptr, *next;
323 int rc = -ENOENT;
324
325 down_write(&service_level_sem);
326 list_for_each_entry_safe(ptr, next, &service_level_list, list) {
327 if (ptr != slr)
328 continue;
329 list_del(&ptr->list);
330 rc = 0;
331 break;
332 }
333 up_write(&service_level_sem);
334 return rc;
335}
336EXPORT_SYMBOL(unregister_service_level);
337
338static void *service_level_start(struct seq_file *m, loff_t *pos)
339{
340 down_read(&service_level_sem);
341 return seq_list_start(&service_level_list, *pos);
342}
343
344static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
345{
346 return seq_list_next(p, &service_level_list, pos);
347}
348
349static void service_level_stop(struct seq_file *m, void *p)
350{
351 up_read(&service_level_sem);
352}
353
354static int service_level_show(struct seq_file *m, void *p)
355{
356 struct service_level *slr;
357
358 slr = list_entry(p, struct service_level, list);
359 slr->seq_print(m, slr);
360 return 0;
361}
362
363static const struct seq_operations service_level_seq_ops = {
364 .start = service_level_start,
365 .next = service_level_next,
366 .stop = service_level_stop,
367 .show = service_level_show
368};
369
370static int service_level_open(struct inode *inode, struct file *file)
371{
372 return seq_open(file, &service_level_seq_ops);
373}
374
375static const struct file_operations service_level_ops = {
376 .open = service_level_open,
377 .read = seq_read,
378 .llseek = seq_lseek,
379 .release = seq_release
380};
381
382static void service_level_vm_print(struct seq_file *m,
383 struct service_level *slr)
384{
385 char *query_buffer, *str;
386
387 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
388 if (!query_buffer)
389 return;
390 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
391 str = strchr(query_buffer, '\n');
392 if (str)
393 *str = 0;
394 seq_printf(m, "VM: %s\n", query_buffer);
395 kfree(query_buffer);
396}
397
398static struct service_level service_level_vm = {
399 .seq_print = service_level_vm_print
400};
401
402static __init int create_proc_service_level(void)
403{
404 proc_create("service_levels", 0, NULL, &service_level_ops);
405 if (MACHINE_IS_VM)
406 register_service_level(&service_level_vm);
407 return 0;
408}
409subsys_initcall(create_proc_service_level);
410
411/*
412 * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
413 */
414void s390_adjust_jiffies(void)
415{
416 struct sysinfo_1_2_2 *info;
417 const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
418 FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
419 FP_DECL_EX;
420 unsigned int capability;
421
422 info = (void *) get_zeroed_page(GFP_KERNEL);
423 if (!info)
424 return;
425
426 if (stsi(info, 1, 2, 2) == 0) {
427 /*
428 * Major sigh. The cpu capability encoding is "special".
429 * If the first 9 bits of info->capability are 0 then it
430 * is a 32 bit unsigned integer in the range 0 .. 2^23.
431 * If the first 9 bits are != 0 then it is a 32 bit float.
432 * In addition a lower value indicates a proportionally
433 * higher cpu capacity. Bogomips are the other way round.
434 * To get to a halfway suitable number we divide 1e7
435 * by the cpu capability number. Yes, that means a floating
436 * point division .. math-emu here we come :-)
437 */
438 FP_UNPACK_SP(SA, &fmil);
439 if ((info->capability >> 23) == 0)
440 FP_FROM_INT_S(SB, (long) info->capability, 64, long);
441 else
442 FP_UNPACK_SP(SB, &info->capability);
443 FP_DIV_S(SR, SA, SB);
444 FP_TO_INT_S(capability, SR, 32, 0);
445 } else
446 /*
447 * Really old machine without stsi block for basic
448 * cpu information. Report 42.0 bogomips.
449 */
450 capability = 42;
451 loops_per_jiffy = capability * (500000/HZ);
452 free_page((unsigned long) info);
453}
454
455/*
456 * calibrate the delay loop
457 */
458void calibrate_delay(void)
459{
460 s390_adjust_jiffies();
461 /* Print the good old Bogomips line .. */
462 printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
463 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
464 (loops_per_jiffy/(5000/HZ)) % 100);
465}