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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 bool has_var_cap;
85 int i;
86
87 if (stsi(info, 1, 1, 1))
88 return;
89 has_var_cap = !!info->model_var_cap[0];
90 EBCASC(info->manufacturer, sizeof(info->manufacturer));
91 EBCASC(info->type, sizeof(info->type));
92 EBCASC(info->model, sizeof(info->model));
93 EBCASC(info->sequence, sizeof(info->sequence));
94 EBCASC(info->plant, sizeof(info->plant));
95 EBCASC(info->model_capacity, sizeof(info->model_capacity));
96 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
97 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
98 if (has_var_cap)
99 EBCASC(info->model_var_cap, sizeof(info->model_var_cap));
100 seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer);
101 seq_printf(m, "Type: %-4.4s\n", info->type);
102 if (info->lic)
103 seq_printf(m, "LIC Identifier: %016lx\n", info->lic);
104 /*
105 * Sigh: the model field has been renamed with System z9
106 * to model_capacity and a new model field has been added
107 * after the plant field. To avoid confusing older programs
108 * the "Model:" prints "model_capacity model" or just
109 * "model_capacity" if the model string is empty .
110 */
111 seq_printf(m, "Model: %-16.16s", info->model_capacity);
112 if (info->model[0] != '\0')
113 seq_printf(m, " %-16.16s", info->model);
114 seq_putc(m, '\n');
115 seq_printf(m, "Sequence Code: %-16.16s\n", info->sequence);
116 seq_printf(m, "Plant: %-4.4s\n", info->plant);
117 seq_printf(m, "Model Capacity: %-16.16s %08u\n",
118 info->model_capacity, info->model_cap_rating);
119 if (info->model_perm_cap_rating)
120 seq_printf(m, "Model Perm. Capacity: %-16.16s %08u\n",
121 info->model_perm_cap,
122 info->model_perm_cap_rating);
123 if (info->model_temp_cap_rating)
124 seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n",
125 info->model_temp_cap,
126 info->model_temp_cap_rating);
127 if (has_var_cap && info->model_var_cap_rating)
128 seq_printf(m, "Model Var. Capacity: %-16.16s %08u\n",
129 info->model_var_cap,
130 info->model_var_cap_rating);
131 if (info->ncr)
132 seq_printf(m, "Nominal Cap. Rating: %08u\n", info->ncr);
133 if (info->npr)
134 seq_printf(m, "Nominal Perm. Rating: %08u\n", info->npr);
135 if (info->ntr)
136 seq_printf(m, "Nominal Temp. Rating: %08u\n", info->ntr);
137 if (has_var_cap && info->nvr)
138 seq_printf(m, "Nominal Var. Rating: %08u\n", info->nvr);
139 if (info->cai) {
140 seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai);
141 seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr);
142 seq_printf(m, "Capacity Transient: %d\n", info->t);
143 }
144 if (info->p) {
145 for (i = 1; i <= ARRAY_SIZE(info->typepct); i++) {
146 seq_printf(m, "Type %d Percentage: %d\n",
147 i, info->typepct[i - 1]);
148 }
149 }
150}
151
152static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info)
153{
154 int i;
155
156 seq_putc(m, '\n');
157 if (!MACHINE_HAS_TOPOLOGY)
158 return;
159 if (stsi(info, 15, 1, topology_max_mnest))
160 return;
161 seq_printf(m, "CPU Topology HW: ");
162 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
163 seq_printf(m, " %d", info->mag[i]);
164 seq_putc(m, '\n');
165#ifdef CONFIG_SCHED_TOPOLOGY
166 store_topology(info);
167 seq_printf(m, "CPU Topology SW: ");
168 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
169 seq_printf(m, " %d", info->mag[i]);
170 seq_putc(m, '\n');
171#endif
172}
173
174static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info)
175{
176 struct sysinfo_1_2_2_extension *ext;
177 int i;
178
179 if (stsi(info, 1, 2, 2))
180 return;
181 ext = (struct sysinfo_1_2_2_extension *)
182 ((unsigned long) info + info->acc_offset);
183 seq_printf(m, "CPUs Total: %d\n", info->cpus_total);
184 seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured);
185 seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby);
186 seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved);
187 if (info->mt_installed) {
188 seq_printf(m, "CPUs G-MTID: %d\n", info->mt_gtid);
189 seq_printf(m, "CPUs S-MTID: %d\n", info->mt_stid);
190 }
191 /*
192 * Sigh 2. According to the specification the alternate
193 * capability field is a 32 bit floating point number
194 * if the higher order 8 bits are not zero. Printing
195 * a floating point number in the kernel is a no-no,
196 * always print the number as 32 bit unsigned integer.
197 * The user-space needs to know about the strange
198 * encoding of the alternate cpu capability.
199 */
200 seq_printf(m, "Capability: %u", info->capability);
201 if (info->format == 1)
202 seq_printf(m, " %u", ext->alt_capability);
203 seq_putc(m, '\n');
204 if (info->nominal_cap)
205 seq_printf(m, "Nominal Capability: %d\n", info->nominal_cap);
206 if (info->secondary_cap)
207 seq_printf(m, "Secondary Capability: %d\n", info->secondary_cap);
208 for (i = 2; i <= info->cpus_total; i++) {
209 seq_printf(m, "Adjustment %02d-way: %u",
210 i, info->adjustment[i-2]);
211 if (info->format == 1)
212 seq_printf(m, " %u", ext->alt_adjustment[i-2]);
213 seq_putc(m, '\n');
214 }
215}
216
217static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info)
218{
219 if (stsi(info, 2, 2, 2))
220 return;
221 EBCASC(info->name, sizeof(info->name));
222 seq_putc(m, '\n');
223 seq_printf(m, "LPAR Number: %d\n", info->lpar_number);
224 seq_printf(m, "LPAR Characteristics: ");
225 if (info->characteristics & LPAR_CHAR_DEDICATED)
226 seq_printf(m, "Dedicated ");
227 if (info->characteristics & LPAR_CHAR_SHARED)
228 seq_printf(m, "Shared ");
229 if (info->characteristics & LPAR_CHAR_LIMITED)
230 seq_printf(m, "Limited ");
231 seq_putc(m, '\n');
232 seq_printf(m, "LPAR Name: %-8.8s\n", info->name);
233 seq_printf(m, "LPAR Adjustment: %d\n", info->caf);
234 seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total);
235 seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured);
236 seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby);
237 seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved);
238 seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated);
239 seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared);
240 if (info->mt_installed) {
241 seq_printf(m, "LPAR CPUs G-MTID: %d\n", info->mt_gtid);
242 seq_printf(m, "LPAR CPUs S-MTID: %d\n", info->mt_stid);
243 seq_printf(m, "LPAR CPUs PS-MTID: %d\n", info->mt_psmtid);
244 }
245 if (convert_ext_name(info->vsne, info->ext_name, sizeof(info->ext_name))) {
246 seq_printf(m, "LPAR Extended Name: %-.256s\n", info->ext_name);
247 seq_printf(m, "LPAR UUID: %pUb\n", &info->uuid);
248 }
249}
250
251static void print_ext_name(struct seq_file *m, int lvl,
252 struct sysinfo_3_2_2 *info)
253{
254 size_t len = sizeof(info->ext_names[lvl]);
255
256 if (!convert_ext_name(info->vm[lvl].evmne, info->ext_names[lvl], len))
257 return;
258 seq_printf(m, "VM%02d Extended Name: %-.256s\n", lvl,
259 info->ext_names[lvl]);
260}
261
262static void print_uuid(struct seq_file *m, int i, struct sysinfo_3_2_2 *info)
263{
264 if (uuid_is_null(&info->vm[i].uuid))
265 return;
266 seq_printf(m, "VM%02d UUID: %pUb\n", i, &info->vm[i].uuid);
267}
268
269static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info)
270{
271 int i;
272
273 if (stsi(info, 3, 2, 2))
274 return;
275 for (i = 0; i < info->count; i++) {
276 EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
277 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
278 seq_putc(m, '\n');
279 seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name);
280 seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi);
281 seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf);
282 seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total);
283 seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured);
284 seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby);
285 seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved);
286 print_ext_name(m, i, info);
287 print_uuid(m, i, info);
288 }
289}
290
291static int sysinfo_show(struct seq_file *m, void *v)
292{
293 void *info = (void *)get_zeroed_page(GFP_KERNEL);
294 int level;
295
296 if (!info)
297 return 0;
298 level = stsi(NULL, 0, 0, 0);
299 if (level >= 1)
300 stsi_1_1_1(m, info);
301 if (level >= 1)
302 stsi_15_1_x(m, info);
303 if (level >= 1)
304 stsi_1_2_2(m, info);
305 if (level >= 2)
306 stsi_2_2_2(m, info);
307 if (level >= 3)
308 stsi_3_2_2(m, info);
309 free_page((unsigned long)info);
310 return 0;
311}
312
313static int __init sysinfo_create_proc(void)
314{
315 proc_create_single("sysinfo", 0444, NULL, sysinfo_show);
316 return 0;
317}
318device_initcall(sysinfo_create_proc);
319
320#endif /* CONFIG_PROC_FS */
321
322/*
323 * Service levels interface.
324 */
325
326static DECLARE_RWSEM(service_level_sem);
327static LIST_HEAD(service_level_list);
328
329int register_service_level(struct service_level *slr)
330{
331 struct service_level *ptr;
332
333 down_write(&service_level_sem);
334 list_for_each_entry(ptr, &service_level_list, list)
335 if (ptr == slr) {
336 up_write(&service_level_sem);
337 return -EEXIST;
338 }
339 list_add_tail(&slr->list, &service_level_list);
340 up_write(&service_level_sem);
341 return 0;
342}
343EXPORT_SYMBOL(register_service_level);
344
345int unregister_service_level(struct service_level *slr)
346{
347 struct service_level *ptr, *next;
348 int rc = -ENOENT;
349
350 down_write(&service_level_sem);
351 list_for_each_entry_safe(ptr, next, &service_level_list, list) {
352 if (ptr != slr)
353 continue;
354 list_del(&ptr->list);
355 rc = 0;
356 break;
357 }
358 up_write(&service_level_sem);
359 return rc;
360}
361EXPORT_SYMBOL(unregister_service_level);
362
363static void *service_level_start(struct seq_file *m, loff_t *pos)
364{
365 down_read(&service_level_sem);
366 return seq_list_start(&service_level_list, *pos);
367}
368
369static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
370{
371 return seq_list_next(p, &service_level_list, pos);
372}
373
374static void service_level_stop(struct seq_file *m, void *p)
375{
376 up_read(&service_level_sem);
377}
378
379static int service_level_show(struct seq_file *m, void *p)
380{
381 struct service_level *slr;
382
383 slr = list_entry(p, struct service_level, list);
384 slr->seq_print(m, slr);
385 return 0;
386}
387
388static const struct seq_operations service_level_seq_ops = {
389 .start = service_level_start,
390 .next = service_level_next,
391 .stop = service_level_stop,
392 .show = service_level_show
393};
394
395static void service_level_vm_print(struct seq_file *m,
396 struct service_level *slr)
397{
398 char *query_buffer, *str;
399
400 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
401 if (!query_buffer)
402 return;
403 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
404 str = strchr(query_buffer, '\n');
405 if (str)
406 *str = 0;
407 seq_printf(m, "VM: %s\n", query_buffer);
408 kfree(query_buffer);
409}
410
411static struct service_level service_level_vm = {
412 .seq_print = service_level_vm_print
413};
414
415static __init int create_proc_service_level(void)
416{
417 proc_create_seq("service_levels", 0, NULL, &service_level_seq_ops);
418 if (MACHINE_IS_VM)
419 register_service_level(&service_level_vm);
420 return 0;
421}
422subsys_initcall(create_proc_service_level);
423
424/*
425 * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
426 */
427void s390_adjust_jiffies(void)
428{
429 struct sysinfo_1_2_2 *info;
430 unsigned long capability;
431 struct kernel_fpu fpu;
432
433 info = (void *) get_zeroed_page(GFP_KERNEL);
434 if (!info)
435 return;
436
437 if (stsi(info, 1, 2, 2) == 0) {
438 /*
439 * Major sigh. The cpu capability encoding is "special".
440 * If the first 9 bits of info->capability are 0 then it
441 * is a 32 bit unsigned integer in the range 0 .. 2^23.
442 * If the first 9 bits are != 0 then it is a 32 bit float.
443 * In addition a lower value indicates a proportionally
444 * higher cpu capacity. Bogomips are the other way round.
445 * To get to a halfway suitable number we divide 1e7
446 * by the cpu capability number. Yes, that means a floating
447 * point division ..
448 */
449 kernel_fpu_begin(&fpu, KERNEL_FPR);
450 asm volatile(
451 " sfpc %3\n"
452 " l %0,%1\n"
453 " tmlh %0,0xff80\n"
454 " jnz 0f\n"
455 " cefbr %%f2,%0\n"
456 " j 1f\n"
457 "0: le %%f2,%1\n"
458 "1: cefbr %%f0,%2\n"
459 " debr %%f0,%%f2\n"
460 " cgebr %0,5,%%f0\n"
461 : "=&d" (capability)
462 : "Q" (info->capability), "d" (10000000), "d" (0)
463 : "cc"
464 );
465 kernel_fpu_end(&fpu, KERNEL_FPR);
466 } else
467 /*
468 * Really old machine without stsi block for basic
469 * cpu information. Report 42.0 bogomips.
470 */
471 capability = 42;
472 loops_per_jiffy = capability * (500000/HZ);
473 free_page((unsigned long) info);
474}
475
476/*
477 * calibrate the delay loop
478 */
479void calibrate_delay(void)
480{
481 s390_adjust_jiffies();
482 /* Print the good old Bogomips line .. */
483 printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
484 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
485 (loops_per_jiffy/(5000/HZ)) % 100);
486}
487
488#ifdef CONFIG_DEBUG_FS
489
490#define STSI_FILE(fc, s1, s2) \
491static int stsi_open_##fc##_##s1##_##s2(struct inode *inode, struct file *file)\
492{ \
493 file->private_data = (void *) get_zeroed_page(GFP_KERNEL); \
494 if (!file->private_data) \
495 return -ENOMEM; \
496 if (stsi(file->private_data, fc, s1, s2)) { \
497 free_page((unsigned long)file->private_data); \
498 file->private_data = NULL; \
499 return -EACCES; \
500 } \
501 return nonseekable_open(inode, file); \
502} \
503 \
504static const struct file_operations stsi_##fc##_##s1##_##s2##_fs_ops = { \
505 .open = stsi_open_##fc##_##s1##_##s2, \
506 .release = stsi_release, \
507 .read = stsi_read, \
508 .llseek = no_llseek, \
509};
510
511static int stsi_release(struct inode *inode, struct file *file)
512{
513 free_page((unsigned long)file->private_data);
514 return 0;
515}
516
517static ssize_t stsi_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
518{
519 return simple_read_from_buffer(buf, size, ppos, file->private_data, PAGE_SIZE);
520}
521
522STSI_FILE( 1, 1, 1);
523STSI_FILE( 1, 2, 1);
524STSI_FILE( 1, 2, 2);
525STSI_FILE( 2, 2, 1);
526STSI_FILE( 2, 2, 2);
527STSI_FILE( 3, 2, 2);
528STSI_FILE(15, 1, 2);
529STSI_FILE(15, 1, 3);
530STSI_FILE(15, 1, 4);
531STSI_FILE(15, 1, 5);
532STSI_FILE(15, 1, 6);
533
534struct stsi_file {
535 const struct file_operations *fops;
536 char *name;
537};
538
539static struct stsi_file stsi_file[] __initdata = {
540 {.fops = &stsi_1_1_1_fs_ops, .name = "1_1_1"},
541 {.fops = &stsi_1_2_1_fs_ops, .name = "1_2_1"},
542 {.fops = &stsi_1_2_2_fs_ops, .name = "1_2_2"},
543 {.fops = &stsi_2_2_1_fs_ops, .name = "2_2_1"},
544 {.fops = &stsi_2_2_2_fs_ops, .name = "2_2_2"},
545 {.fops = &stsi_3_2_2_fs_ops, .name = "3_2_2"},
546 {.fops = &stsi_15_1_2_fs_ops, .name = "15_1_2"},
547 {.fops = &stsi_15_1_3_fs_ops, .name = "15_1_3"},
548 {.fops = &stsi_15_1_4_fs_ops, .name = "15_1_4"},
549 {.fops = &stsi_15_1_5_fs_ops, .name = "15_1_5"},
550 {.fops = &stsi_15_1_6_fs_ops, .name = "15_1_6"},
551};
552
553static u8 stsi_0_0_0;
554
555static __init int stsi_init_debugfs(void)
556{
557 struct dentry *stsi_root;
558 struct stsi_file *sf;
559 int lvl, i;
560
561 stsi_root = debugfs_create_dir("stsi", arch_debugfs_dir);
562 lvl = stsi(NULL, 0, 0, 0);
563 if (lvl > 0)
564 stsi_0_0_0 = lvl;
565 debugfs_create_u8("0_0_0", 0400, stsi_root, &stsi_0_0_0);
566 for (i = 0; i < ARRAY_SIZE(stsi_file); i++) {
567 sf = &stsi_file[i];
568 debugfs_create_file(sf->name, 0400, stsi_root, NULL, sf->fops);
569 }
570 if (IS_ENABLED(CONFIG_SCHED_TOPOLOGY) && MACHINE_HAS_TOPOLOGY) {
571 char link_to[10];
572
573 sprintf(link_to, "15_1_%d", topology_mnest_limit());
574 debugfs_create_symlink("topology", stsi_root, link_to);
575 }
576 return 0;
577}
578device_initcall(stsi_init_debugfs);
579
580#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 static int max_mnest;
115 int i, rc;
116
117 seq_putc(m, '\n');
118 if (!MACHINE_HAS_TOPOLOGY)
119 return;
120 if (stsi(info, 15, 1, topology_max_mnest))
121 return;
122 seq_printf(m, "CPU Topology HW: ");
123 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
124 seq_printf(m, " %d", info->mag[i]);
125 seq_putc(m, '\n');
126#ifdef CONFIG_SCHED_MC
127 store_topology(info);
128 seq_printf(m, "CPU Topology SW: ");
129 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
130 seq_printf(m, " %d", info->mag[i]);
131 seq_putc(m, '\n');
132#endif
133}
134
135static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info)
136{
137 struct sysinfo_1_2_2_extension *ext;
138 int i;
139
140 if (stsi(info, 1, 2, 2))
141 return;
142 ext = (struct sysinfo_1_2_2_extension *)
143 ((unsigned long) info + info->acc_offset);
144 seq_printf(m, "CPUs Total: %d\n", info->cpus_total);
145 seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured);
146 seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby);
147 seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved);
148 /*
149 * Sigh 2. According to the specification the alternate
150 * capability field is a 32 bit floating point number
151 * if the higher order 8 bits are not zero. Printing
152 * a floating point number in the kernel is a no-no,
153 * always print the number as 32 bit unsigned integer.
154 * The user-space needs to know about the strange
155 * encoding of the alternate cpu capability.
156 */
157 seq_printf(m, "Capability: %u", info->capability);
158 if (info->format == 1)
159 seq_printf(m, " %u", ext->alt_capability);
160 seq_putc(m, '\n');
161 if (info->nominal_cap)
162 seq_printf(m, "Nominal Capability: %d\n", info->nominal_cap);
163 if (info->secondary_cap)
164 seq_printf(m, "Secondary Capability: %d\n", info->secondary_cap);
165 for (i = 2; i <= info->cpus_total; i++) {
166 seq_printf(m, "Adjustment %02d-way: %u",
167 i, info->adjustment[i-2]);
168 if (info->format == 1)
169 seq_printf(m, " %u", ext->alt_adjustment[i-2]);
170 seq_putc(m, '\n');
171 }
172}
173
174static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info)
175{
176 if (stsi(info, 2, 2, 2))
177 return;
178 EBCASC(info->name, sizeof(info->name));
179 seq_putc(m, '\n');
180 seq_printf(m, "LPAR Number: %d\n", info->lpar_number);
181 seq_printf(m, "LPAR Characteristics: ");
182 if (info->characteristics & LPAR_CHAR_DEDICATED)
183 seq_printf(m, "Dedicated ");
184 if (info->characteristics & LPAR_CHAR_SHARED)
185 seq_printf(m, "Shared ");
186 if (info->characteristics & LPAR_CHAR_LIMITED)
187 seq_printf(m, "Limited ");
188 seq_putc(m, '\n');
189 seq_printf(m, "LPAR Name: %-8.8s\n", info->name);
190 seq_printf(m, "LPAR Adjustment: %d\n", info->caf);
191 seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total);
192 seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured);
193 seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby);
194 seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved);
195 seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated);
196 seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared);
197}
198
199static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info)
200{
201 int i;
202
203 if (stsi(info, 3, 2, 2))
204 return;
205 for (i = 0; i < info->count; i++) {
206 EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
207 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
208 seq_putc(m, '\n');
209 seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name);
210 seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi);
211 seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf);
212 seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total);
213 seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured);
214 seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby);
215 seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved);
216 }
217}
218
219static int sysinfo_show(struct seq_file *m, void *v)
220{
221 void *info = (void *)get_zeroed_page(GFP_KERNEL);
222 int level;
223
224 if (!info)
225 return 0;
226 level = stsi(NULL, 0, 0, 0);
227 if (level >= 1)
228 stsi_1_1_1(m, info);
229 if (level >= 1)
230 stsi_15_1_x(m, info);
231 if (level >= 1)
232 stsi_1_2_2(m, info);
233 if (level >= 2)
234 stsi_2_2_2(m, info);
235 if (level >= 3)
236 stsi_3_2_2(m, info);
237 free_page((unsigned long)info);
238 return 0;
239}
240
241static int sysinfo_open(struct inode *inode, struct file *file)
242{
243 return single_open(file, sysinfo_show, NULL);
244}
245
246static const struct file_operations sysinfo_fops = {
247 .open = sysinfo_open,
248 .read = seq_read,
249 .llseek = seq_lseek,
250 .release = single_release,
251};
252
253static int __init sysinfo_create_proc(void)
254{
255 proc_create("sysinfo", 0444, NULL, &sysinfo_fops);
256 return 0;
257}
258device_initcall(sysinfo_create_proc);
259
260/*
261 * Service levels interface.
262 */
263
264static DECLARE_RWSEM(service_level_sem);
265static LIST_HEAD(service_level_list);
266
267int register_service_level(struct service_level *slr)
268{
269 struct service_level *ptr;
270
271 down_write(&service_level_sem);
272 list_for_each_entry(ptr, &service_level_list, list)
273 if (ptr == slr) {
274 up_write(&service_level_sem);
275 return -EEXIST;
276 }
277 list_add_tail(&slr->list, &service_level_list);
278 up_write(&service_level_sem);
279 return 0;
280}
281EXPORT_SYMBOL(register_service_level);
282
283int unregister_service_level(struct service_level *slr)
284{
285 struct service_level *ptr, *next;
286 int rc = -ENOENT;
287
288 down_write(&service_level_sem);
289 list_for_each_entry_safe(ptr, next, &service_level_list, list) {
290 if (ptr != slr)
291 continue;
292 list_del(&ptr->list);
293 rc = 0;
294 break;
295 }
296 up_write(&service_level_sem);
297 return rc;
298}
299EXPORT_SYMBOL(unregister_service_level);
300
301static void *service_level_start(struct seq_file *m, loff_t *pos)
302{
303 down_read(&service_level_sem);
304 return seq_list_start(&service_level_list, *pos);
305}
306
307static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
308{
309 return seq_list_next(p, &service_level_list, pos);
310}
311
312static void service_level_stop(struct seq_file *m, void *p)
313{
314 up_read(&service_level_sem);
315}
316
317static int service_level_show(struct seq_file *m, void *p)
318{
319 struct service_level *slr;
320
321 slr = list_entry(p, struct service_level, list);
322 slr->seq_print(m, slr);
323 return 0;
324}
325
326static const struct seq_operations service_level_seq_ops = {
327 .start = service_level_start,
328 .next = service_level_next,
329 .stop = service_level_stop,
330 .show = service_level_show
331};
332
333static int service_level_open(struct inode *inode, struct file *file)
334{
335 return seq_open(file, &service_level_seq_ops);
336}
337
338static const struct file_operations service_level_ops = {
339 .open = service_level_open,
340 .read = seq_read,
341 .llseek = seq_lseek,
342 .release = seq_release
343};
344
345static void service_level_vm_print(struct seq_file *m,
346 struct service_level *slr)
347{
348 char *query_buffer, *str;
349
350 query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
351 if (!query_buffer)
352 return;
353 cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
354 str = strchr(query_buffer, '\n');
355 if (str)
356 *str = 0;
357 seq_printf(m, "VM: %s\n", query_buffer);
358 kfree(query_buffer);
359}
360
361static struct service_level service_level_vm = {
362 .seq_print = service_level_vm_print
363};
364
365static __init int create_proc_service_level(void)
366{
367 proc_create("service_levels", 0, NULL, &service_level_ops);
368 if (MACHINE_IS_VM)
369 register_service_level(&service_level_vm);
370 return 0;
371}
372subsys_initcall(create_proc_service_level);
373
374/*
375 * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
376 */
377void s390_adjust_jiffies(void)
378{
379 struct sysinfo_1_2_2 *info;
380 const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
381 FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
382 FP_DECL_EX;
383 unsigned int capability;
384
385 info = (void *) get_zeroed_page(GFP_KERNEL);
386 if (!info)
387 return;
388
389 if (stsi(info, 1, 2, 2) == 0) {
390 /*
391 * Major sigh. The cpu capability encoding is "special".
392 * If the first 9 bits of info->capability are 0 then it
393 * is a 32 bit unsigned integer in the range 0 .. 2^23.
394 * If the first 9 bits are != 0 then it is a 32 bit float.
395 * In addition a lower value indicates a proportionally
396 * higher cpu capacity. Bogomips are the other way round.
397 * To get to a halfway suitable number we divide 1e7
398 * by the cpu capability number. Yes, that means a floating
399 * point division .. math-emu here we come :-)
400 */
401 FP_UNPACK_SP(SA, &fmil);
402 if ((info->capability >> 23) == 0)
403 FP_FROM_INT_S(SB, (long) info->capability, 64, long);
404 else
405 FP_UNPACK_SP(SB, &info->capability);
406 FP_DIV_S(SR, SA, SB);
407 FP_TO_INT_S(capability, SR, 32, 0);
408 } else
409 /*
410 * Really old machine without stsi block for basic
411 * cpu information. Report 42.0 bogomips.
412 */
413 capability = 42;
414 loops_per_jiffy = capability * (500000/HZ);
415 free_page((unsigned long) info);
416}
417
418/*
419 * calibrate the delay loop
420 */
421void calibrate_delay(void)
422{
423 s390_adjust_jiffies();
424 /* Print the good old Bogomips line .. */
425 printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
426 "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
427 (loops_per_jiffy/(5000/HZ)) % 100);
428}