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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001// SPDX-License-Identifier: GPL-2.0
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
Heiko Carstens94f5b092009-03-26 15:23:50 +01003 * Copyright IBM Corp. 2001, 2009
4 * Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>,
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 */
7
Heiko Carstensae5ca672017-03-13 15:58:59 +01008#include <linux/debugfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/kernel.h>
10#include <linux/mm.h>
11#include <linux/proc_fs.h>
Martin Schwidefsky6bcac502008-12-25 13:38:49 +010012#include <linux/seq_file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/init.h>
Martin Schwidefsky31ee4b22007-02-05 21:18:31 +010014#include <linux/delay.h>
Paul Gortmaker3994a522017-02-09 15:20:23 -050015#include <linux/export.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090016#include <linux/slab.h>
Heiko Carstensd09a3072022-02-28 11:22:12 +010017#include <asm/asm-extable.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <asm/ebcdic.h>
Heiko Carstensae5ca672017-03-13 15:58:59 +010019#include <asm/debug.h>
Christian Borntraegeraa24f7f2008-04-17 07:46:09 +020020#include <asm/sysinfo.h>
Martin Schwidefsky6bcac502008-12-25 13:38:49 +010021#include <asm/cpcmd.h>
Heiko Carstens96f4a702010-10-25 16:10:54 +020022#include <asm/topology.h>
Heiko Carstens9c203232015-07-01 13:19:19 +020023#include <asm/fpu/api.h>
Martin Schwidefsky31ee4b22007-02-05 21:18:31 +010024
Heiko Carstensfade4dc42012-09-04 14:26:03 +020025int topology_max_mnest;
26
Heiko Carstens2c798132016-06-20 14:05:54 +020027static inline int __stsi(void *sysinfo, int fc, int sel1, int sel2, int *lvl)
Linus Torvalds1da177e2005-04-16 15:20:36 -070028{
Heiko Carstens5fe29832021-06-14 19:54:42 +020029 int r0 = (fc << 28) | sel1;
Heiko Carstenscaf757c2012-09-06 14:42:13 +020030 int rc = 0;
Heiko Carstens0facaa12012-09-03 09:38:30 +020031
Heiko Carstenscaf757c2012-09-06 14:42:13 +020032 asm volatile(
Heiko Carstens5fe29832021-06-14 19:54:42 +020033 " lr 0,%[r0]\n"
34 " lr 1,%[r1]\n"
35 " stsi 0(%[sysinfo])\n"
Heiko Carstenscaf757c2012-09-06 14:42:13 +020036 "0: jz 2f\n"
Heiko Carstens5fe29832021-06-14 19:54:42 +020037 "1: lhi %[rc],%[retval]\n"
38 "2: lr %[r0],0\n"
Heiko Carstenscaf757c2012-09-06 14:42:13 +020039 EX_TABLE(0b, 1b)
Heiko Carstens5fe29832021-06-14 19:54:42 +020040 : [r0] "+d" (r0), [rc] "+d" (rc)
41 : [r1] "d" (sel2),
42 [sysinfo] "a" (sysinfo),
43 [retval] "K" (-EOPNOTSUPP)
44 : "cc", "0", "1", "memory");
Heiko Carstens2c798132016-06-20 14:05:54 +020045 *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);
Heiko Carstenscaf757c2012-09-06 14:42:13 +020060 if (rc)
61 return rc;
Heiko Carstens2c798132016-06-20 14:05:54 +020062 return fc ? 0 : lvl;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063}
Heiko Carstenscaf757c2012-09-06 14:42:13 +020064EXPORT_SYMBOL(stsi);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Heiko Carstens9f35b812018-07-02 10:54:02 +020066#ifdef CONFIG_PROC_FS
67
Viktor Mihajlovskie32eae12016-11-10 14:32:59 +010068static 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
Heiko Carstens0facaa12012-09-03 09:38:30 +020082static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -070083{
Heiko Carstens25502f02012-09-03 14:05:05 +020084 int i;
85
Heiko Carstenscaf757c2012-09-06 14:42:13 +020086 if (stsi(info, 1, 1, 1))
Heiko Carstens0facaa12012-09-03 09:38:30 +020087 return;
Martin Schwidefsky0fee6442006-09-20 15:59:10 +020088 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));
Martin Schwidefskycbce70e2008-04-17 07:46:10 +020094 EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
95 EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
Heiko Carstens0facaa12012-09-03 09:38:30 +020096 seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer);
97 seq_printf(m, "Type: %-4.4s\n", info->type);
Hendrik Brueckner5260b0f2018-01-24 16:19:53 +010098 if (info->lic)
99 seq_printf(m, "LIC Identifier: %016lx\n", info->lic);
Heiko Carstens0facaa12012-09-03 09:38:30 +0200100 /*
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);
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200108 if (info->model[0] != '\0')
Heiko Carstens0facaa12012-09-03 09:38:30 +0200109 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",
Heiko Carstens25502f02012-09-03 14:05:05 +0200114 info->model_capacity, info->model_cap_rating);
115 if (info->model_perm_cap_rating)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200116 seq_printf(m, "Model Perm. Capacity: %-16.16s %08u\n",
117 info->model_perm_cap,
Heiko Carstens25502f02012-09-03 14:05:05 +0200118 info->model_perm_cap_rating);
119 if (info->model_temp_cap_rating)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200120 seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n",
121 info->model_temp_cap,
Heiko Carstens25502f02012-09-03 14:05:05 +0200122 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);
Heiko Carstens7aca2ed2010-10-25 16:10:16 +0200129 if (info->cai) {
Heiko Carstens0facaa12012-09-03 09:38:30 +0200130 seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai);
131 seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr);
Heiko Carstens25502f02012-09-03 14:05:05 +0200132 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 }
Heiko Carstens7aca2ed2010-10-25 16:10:16 +0200139 }
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200140}
141
Heiko Carstens0facaa12012-09-03 09:38:30 +0200142static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info)
Heiko Carstens96f4a702010-10-25 16:10:54 +0200143{
Christian Borntraegere527aec2015-12-07 13:08:48 +0100144 int i;
Heiko Carstens96f4a702010-10-25 16:10:54 +0200145
Heiko Carstens0facaa12012-09-03 09:38:30 +0200146 seq_putc(m, '\n');
Heiko Carstens96f4a702010-10-25 16:10:54 +0200147 if (!MACHINE_HAS_TOPOLOGY)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200148 return;
Heiko Carstenscaf757c2012-09-06 14:42:13 +0200149 if (stsi(info, 15, 1, topology_max_mnest))
150 return;
Heiko Carstens0facaa12012-09-03 09:38:30 +0200151 seq_printf(m, "CPU Topology HW: ");
Heiko Carstens96f4a702010-10-25 16:10:54 +0200152 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200153 seq_printf(m, " %d", info->mag[i]);
154 seq_putc(m, '\n');
Heiko Carstens9236b4d2015-12-28 13:20:43 +0100155#ifdef CONFIG_SCHED_TOPOLOGY
Heiko Carstens96f4a702010-10-25 16:10:54 +0200156 store_topology(info);
Heiko Carstens0facaa12012-09-03 09:38:30 +0200157 seq_printf(m, "CPU Topology SW: ");
Heiko Carstens96f4a702010-10-25 16:10:54 +0200158 for (i = 0; i < TOPOLOGY_NR_MAG; i++)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200159 seq_printf(m, " %d", info->mag[i]);
160 seq_putc(m, '\n');
Heiko Carstens8d11e022010-10-29 16:50:37 +0200161#endif
Heiko Carstens96f4a702010-10-25 16:10:54 +0200162}
163
Heiko Carstens0facaa12012-09-03 09:38:30 +0200164static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info)
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200165{
166 struct sysinfo_1_2_2_extension *ext;
167 int i;
168
Heiko Carstenscaf757c2012-09-06 14:42:13 +0200169 if (stsi(info, 1, 2, 2))
Heiko Carstens0facaa12012-09-03 09:38:30 +0200170 return;
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200171 ext = (struct sysinfo_1_2_2_extension *)
172 ((unsigned long) info + info->acc_offset);
Heiko Carstens0facaa12012-09-03 09:38:30 +0200173 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);
Heiko Carstens7022ec42015-12-30 13:42:37 +0100177 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 }
Heiko Carstens0facaa12012-09-03 09:38:30 +0200181 /*
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');
Heiko Carstens25502f02012-09-03 14:05:05 +0200194 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);
Heiko Carstens0facaa12012-09-03 09:38:30 +0200198 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');
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205}
206
Heiko Carstens0facaa12012-09-03 09:38:30 +0200207static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info)
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200208{
Heiko Carstenscaf757c2012-09-06 14:42:13 +0200209 if (stsi(info, 2, 2, 2))
Heiko Carstens0facaa12012-09-03 09:38:30 +0200210 return;
Heiko Carstens94f5b092009-03-26 15:23:50 +0100211 EBCASC(info->name, sizeof(info->name));
Heiko Carstens0facaa12012-09-03 09:38:30 +0200212 seq_putc(m, '\n');
213 seq_printf(m, "LPAR Number: %d\n", info->lpar_number);
214 seq_printf(m, "LPAR Characteristics: ");
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200215 if (info->characteristics & LPAR_CHAR_DEDICATED)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200216 seq_printf(m, "Dedicated ");
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200217 if (info->characteristics & LPAR_CHAR_SHARED)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200218 seq_printf(m, "Shared ");
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200219 if (info->characteristics & LPAR_CHAR_LIMITED)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200220 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);
Heiko Carstens7022ec42015-12-30 13:42:37 +0100230 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);
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100234 }
Viktor Mihajlovskie32eae12016-11-10 14:32:59 +0100235 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 }
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200239}
240
Ekaterina Tumanovaf3d0bd62014-10-20 15:24:31 +0200241static void print_ext_name(struct seq_file *m, int lvl,
242 struct sysinfo_3_2_2 *info)
243{
Viktor Mihajlovskie32eae12016-11-10 14:32:59 +0100244 size_t len = sizeof(info->ext_names[lvl]);
245
246 if (!convert_ext_name(info->vm[lvl].evmne, info->ext_names[lvl], len))
Ekaterina Tumanovaf3d0bd62014-10-20 15:24:31 +0200247 return;
Ekaterina Tumanovaf3d0bd62014-10-20 15:24:31 +0200248 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{
Christoph Hellwige64e17a2017-05-11 14:00:57 +0200254 if (uuid_is_null(&info->vm[i].uuid))
Ekaterina Tumanovaf3d0bd62014-10-20 15:24:31 +0200255 return;
256 seq_printf(m, "VM%02d UUID: %pUb\n", i, &info->vm[i].uuid);
257}
258
Heiko Carstens0facaa12012-09-03 09:38:30 +0200259static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info)
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200260{
261 int i;
262
Heiko Carstenscaf757c2012-09-06 14:42:13 +0200263 if (stsi(info, 3, 2, 2))
Heiko Carstens0facaa12012-09-03 09:38:30 +0200264 return;
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200265 for (i = 0; i < info->count; i++) {
Heiko Carstens94f5b092009-03-26 15:23:50 +0100266 EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
267 EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
Heiko Carstens0facaa12012-09-03 09:38:30 +0200268 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);
Ekaterina Tumanovaf3d0bd62014-10-20 15:24:31 +0200276 print_ext_name(m, i, info);
277 print_uuid(m, i, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279}
280
Heiko Carstens0facaa12012-09-03 09:38:30 +0200281static int sysinfo_show(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282{
Heiko Carstens0facaa12012-09-03 09:38:30 +0200283 void *info = (void *)get_zeroed_page(GFP_KERNEL);
284 int level;
Heiko Carstens94f5b092009-03-26 15:23:50 +0100285
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 if (!info)
287 return 0;
Heiko Carstenscaf757c2012-09-06 14:42:13 +0200288 level = stsi(NULL, 0, 0, 0);
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200289 if (level >= 1)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200290 stsi_1_1_1(m, info);
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200291 if (level >= 1)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200292 stsi_15_1_x(m, info);
Heiko Carstens96f4a702010-10-25 16:10:54 +0200293 if (level >= 1)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200294 stsi_1_2_2(m, info);
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200295 if (level >= 2)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200296 stsi_2_2_2(m, info);
Martin Schwidefsky0fee6442006-09-20 15:59:10 +0200297 if (level >= 3)
Heiko Carstens0facaa12012-09-03 09:38:30 +0200298 stsi_3_2_2(m, info);
299 free_page((unsigned long)info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 return 0;
301}
Heiko Carstens0facaa12012-09-03 09:38:30 +0200302
Heiko Carstens0facaa12012-09-03 09:38:30 +0200303static int __init sysinfo_create_proc(void)
304{
Christoph Hellwig3f3942a2018-05-15 15:57:23 +0200305 proc_create_single("sysinfo", 0444, NULL, sysinfo_show);
Heiko Carstens0facaa12012-09-03 09:38:30 +0200306 return 0;
307}
308device_initcall(sysinfo_create_proc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
Heiko Carstens9f35b812018-07-02 10:54:02 +0200310#endif /* CONFIG_PROC_FS */
311
Martin Schwidefsky6bcac502008-12-25 13:38:49 +0100312/*
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
Martin Schwidefsky6bcac502008-12-25 13:38:49 +0100385static 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{
Christoph Hellwigfddda2b2018-04-13 19:44:18 +0200407 proc_create_seq("service_levels", 0, NULL, &service_level_seq_ops);
Martin Schwidefsky6bcac502008-12-25 13:38:49 +0100408 if (MACHINE_IS_VM)
409 register_service_level(&service_level_vm);
410 return 0;
411}
Martin Schwidefsky6bcac502008-12-25 13:38:49 +0100412subsys_initcall(create_proc_service_level);
413
414/*
Martin Schwidefsky31ee4b22007-02-05 21:18:31 +0100415 * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
416 */
417void s390_adjust_jiffies(void)
418{
419 struct sysinfo_1_2_2 *info;
Heiko Carstens9c203232015-07-01 13:19:19 +0200420 unsigned long capability;
421 struct kernel_fpu fpu;
Martin Schwidefsky31ee4b22007-02-05 21:18:31 +0100422
423 info = (void *) get_zeroed_page(GFP_KERNEL);
424 if (!info)
425 return;
426
Heiko Carstenscaf757c2012-09-06 14:42:13 +0200427 if (stsi(info, 1, 2, 2) == 0) {
Martin Schwidefsky31ee4b22007-02-05 21:18:31 +0100428 /*
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
Heiko Carstens9c203232015-07-01 13:19:19 +0200437 * point division ..
Martin Schwidefsky31ee4b22007-02-05 21:18:31 +0100438 */
Heiko Carstens9c203232015-07-01 13:19:19 +0200439 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 );
Martin Schwidefsky7f796952016-08-22 12:06:21 +0200455 kernel_fpu_end(&fpu, KERNEL_FPR);
Martin Schwidefsky31ee4b22007-02-05 21:18:31 +0100456 } 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 */
Paul Gortmakere2741f12013-06-18 17:04:52 -0400469void calibrate_delay(void)
Martin Schwidefsky31ee4b22007-02-05 21:18:31 +0100470{
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}
Heiko Carstensae5ca672017-03-13 15:58:59 +0100477
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
Heiko Carstenscdd3bd92017-03-13 16:15:06 +0100512STSI_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);
Heiko Carstensae5ca672017-03-13 15:58:59 +0100518STSI_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 = {
Heiko Carstenscdd3bd92017-03-13 16:15:06 +0100530 {.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"},
Heiko Carstensae5ca672017-03-13 15:58:59 +0100536 {.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
Heiko Carstenscdd3bd92017-03-13 16:15:06 +0100543static u8 stsi_0_0_0;
544
Heiko Carstensae5ca672017-03-13 15:58:59 +0100545static __init int stsi_init_debugfs(void)
546{
547 struct dentry *stsi_root;
548 struct stsi_file *sf;
Heiko Carstenscdd3bd92017-03-13 16:15:06 +0100549 int lvl, i;
Heiko Carstensae5ca672017-03-13 15:58:59 +0100550
551 stsi_root = debugfs_create_dir("stsi", arch_debugfs_dir);
Heiko Carstenscdd3bd92017-03-13 16:15:06 +0100552 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);
Heiko Carstensae5ca672017-03-13 15:58:59 +0100556 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 */