| 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.h> |
| 24 | |
| 25 | int topology_max_mnest; |
| 26 | |
| 27 | static 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 | */ |
| 55 | int 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 | } |
| 64 | EXPORT_SYMBOL(stsi); |
| 65 | |
| 66 | #ifdef CONFIG_PROC_FS |
| 67 | |
| 68 | static 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 | |
| 82 | static 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 | |
| 152 | static 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 | |
| 174 | static 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 | |
| 217 | static 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 | |
| 251 | static 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 | |
| 262 | static 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 | |
| 269 | static 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 | |
| 291 | static 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 | |
| 313 | static int __init sysinfo_create_proc(void) |
| 314 | { |
| 315 | proc_create_single("sysinfo", 0444, NULL, sysinfo_show); |
| 316 | return 0; |
| 317 | } |
| 318 | device_initcall(sysinfo_create_proc); |
| 319 | |
| 320 | #endif /* CONFIG_PROC_FS */ |
| 321 | |
| 322 | /* |
| 323 | * Service levels interface. |
| 324 | */ |
| 325 | |
| 326 | static DECLARE_RWSEM(service_level_sem); |
| 327 | static LIST_HEAD(service_level_list); |
| 328 | |
| 329 | int 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 | } |
| 343 | EXPORT_SYMBOL(register_service_level); |
| 344 | |
| 345 | int 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 | } |
| 361 | EXPORT_SYMBOL(unregister_service_level); |
| 362 | |
| 363 | static 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 | |
| 369 | static 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 | |
| 374 | static void service_level_stop(struct seq_file *m, void *p) |
| 375 | { |
| 376 | up_read(&service_level_sem); |
| 377 | } |
| 378 | |
| 379 | static 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 | |
| 388 | static 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 | |
| 395 | static 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); |
| 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 | |
| 411 | static struct service_level service_level_vm = { |
| 412 | .seq_print = service_level_vm_print |
| 413 | }; |
| 414 | |
| 415 | static __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 | } |
| 422 | subsys_initcall(create_proc_service_level); |
| 423 | |
| 424 | /* |
| 425 | * CPU capability might have changed. Therefore recalculate loops_per_jiffy. |
| 426 | */ |
| 427 | void s390_adjust_jiffies(void) |
| 428 | { |
| 429 | DECLARE_KERNEL_FPU_ONSTACK16(fpu); |
| 430 | struct sysinfo_1_2_2 *info; |
| 431 | unsigned long capability; |
| 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 | fpu_sfpc(0); |
| 451 | if (info->capability & 0xff800000) |
| 452 | fpu_ldgr(2, info->capability); |
| 453 | else |
| 454 | fpu_cefbr(2, info->capability); |
| 455 | fpu_cefbr(0, 10000000); |
| 456 | fpu_debr(0, 2); |
| 457 | capability = fpu_cgebr(0, 5); |
| 458 | kernel_fpu_end(&fpu, KERNEL_FPR); |
| 459 | } else |
| 460 | /* |
| 461 | * Really old machine without stsi block for basic |
| 462 | * cpu information. Report 42.0 bogomips. |
| 463 | */ |
| 464 | capability = 42; |
| 465 | loops_per_jiffy = capability * (500000/HZ); |
| 466 | free_page((unsigned long) info); |
| 467 | } |
| 468 | |
| 469 | /* |
| 470 | * calibrate the delay loop |
| 471 | */ |
| 472 | void calibrate_delay(void) |
| 473 | { |
| 474 | s390_adjust_jiffies(); |
| 475 | /* Print the good old Bogomips line .. */ |
| 476 | printk(KERN_DEBUG "Calibrating delay loop (skipped)... " |
| 477 | "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), |
| 478 | (loops_per_jiffy/(5000/HZ)) % 100); |
| 479 | } |
| 480 | |
| 481 | #ifdef CONFIG_DEBUG_FS |
| 482 | |
| 483 | #define STSI_FILE(fc, s1, s2) \ |
| 484 | static int stsi_open_##fc##_##s1##_##s2(struct inode *inode, struct file *file)\ |
| 485 | { \ |
| 486 | file->private_data = (void *) get_zeroed_page(GFP_KERNEL); \ |
| 487 | if (!file->private_data) \ |
| 488 | return -ENOMEM; \ |
| 489 | if (stsi(file->private_data, fc, s1, s2)) { \ |
| 490 | free_page((unsigned long)file->private_data); \ |
| 491 | file->private_data = NULL; \ |
| 492 | return -EACCES; \ |
| 493 | } \ |
| 494 | return nonseekable_open(inode, file); \ |
| 495 | } \ |
| 496 | \ |
| 497 | static const struct file_operations stsi_##fc##_##s1##_##s2##_fs_ops = { \ |
| 498 | .open = stsi_open_##fc##_##s1##_##s2, \ |
| 499 | .release = stsi_release, \ |
| 500 | .read = stsi_read, \ |
| 501 | }; |
| 502 | |
| 503 | static int stsi_release(struct inode *inode, struct file *file) |
| 504 | { |
| 505 | free_page((unsigned long)file->private_data); |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | static ssize_t stsi_read(struct file *file, char __user *buf, size_t size, loff_t *ppos) |
| 510 | { |
| 511 | return simple_read_from_buffer(buf, size, ppos, file->private_data, PAGE_SIZE); |
| 512 | } |
| 513 | |
| 514 | STSI_FILE( 1, 1, 1); |
| 515 | STSI_FILE( 1, 2, 1); |
| 516 | STSI_FILE( 1, 2, 2); |
| 517 | STSI_FILE( 2, 2, 1); |
| 518 | STSI_FILE( 2, 2, 2); |
| 519 | STSI_FILE( 3, 2, 2); |
| 520 | STSI_FILE(15, 1, 2); |
| 521 | STSI_FILE(15, 1, 3); |
| 522 | STSI_FILE(15, 1, 4); |
| 523 | STSI_FILE(15, 1, 5); |
| 524 | STSI_FILE(15, 1, 6); |
| 525 | |
| 526 | struct stsi_file { |
| 527 | const struct file_operations *fops; |
| 528 | char *name; |
| 529 | }; |
| 530 | |
| 531 | static struct stsi_file stsi_file[] __initdata = { |
| 532 | {.fops = &stsi_1_1_1_fs_ops, .name = "1_1_1"}, |
| 533 | {.fops = &stsi_1_2_1_fs_ops, .name = "1_2_1"}, |
| 534 | {.fops = &stsi_1_2_2_fs_ops, .name = "1_2_2"}, |
| 535 | {.fops = &stsi_2_2_1_fs_ops, .name = "2_2_1"}, |
| 536 | {.fops = &stsi_2_2_2_fs_ops, .name = "2_2_2"}, |
| 537 | {.fops = &stsi_3_2_2_fs_ops, .name = "3_2_2"}, |
| 538 | {.fops = &stsi_15_1_2_fs_ops, .name = "15_1_2"}, |
| 539 | {.fops = &stsi_15_1_3_fs_ops, .name = "15_1_3"}, |
| 540 | {.fops = &stsi_15_1_4_fs_ops, .name = "15_1_4"}, |
| 541 | {.fops = &stsi_15_1_5_fs_ops, .name = "15_1_5"}, |
| 542 | {.fops = &stsi_15_1_6_fs_ops, .name = "15_1_6"}, |
| 543 | }; |
| 544 | |
| 545 | static u8 stsi_0_0_0; |
| 546 | |
| 547 | static __init int stsi_init_debugfs(void) |
| 548 | { |
| 549 | struct dentry *stsi_root; |
| 550 | struct stsi_file *sf; |
| 551 | int lvl, i; |
| 552 | |
| 553 | stsi_root = debugfs_create_dir("stsi", arch_debugfs_dir); |
| 554 | lvl = stsi(NULL, 0, 0, 0); |
| 555 | if (lvl > 0) |
| 556 | stsi_0_0_0 = lvl; |
| 557 | debugfs_create_u8("0_0_0", 0400, stsi_root, &stsi_0_0_0); |
| 558 | for (i = 0; i < ARRAY_SIZE(stsi_file); i++) { |
| 559 | sf = &stsi_file[i]; |
| 560 | debugfs_create_file(sf->name, 0400, stsi_root, NULL, sf->fops); |
| 561 | } |
| 562 | if (IS_ENABLED(CONFIG_SCHED_TOPOLOGY) && MACHINE_HAS_TOPOLOGY) { |
| 563 | char link_to[10]; |
| 564 | |
| 565 | sprintf(link_to, "15_1_%d", topology_mnest_limit()); |
| 566 | debugfs_create_symlink("topology", stsi_root, link_to); |
| 567 | } |
| 568 | return 0; |
| 569 | } |
| 570 | device_initcall(stsi_init_debugfs); |
| 571 | |
| 572 | #endif /* CONFIG_DEBUG_FS */ |