1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * PowerPC64 LPAR Configuration Information Driver 4 * 5 * Dave Engebretsen engebret@us.ibm.com 6 * Copyright (c) 2003 Dave Engebretsen 7 * Will Schmidt willschm@us.ibm.com 8 * SPLPAR updates, Copyright (c) 2003 Will Schmidt IBM Corporation. 9 * seq_file updates, Copyright (c) 2004 Will Schmidt IBM Corporation. 10 * Nathan Lynch nathanl@austin.ibm.com 11 * Added lparcfg_write, Copyright (C) 2004 Nathan Lynch IBM Corporation. 12 * 13 * This driver creates a proc file at /proc/ppc64/lparcfg which contains 14 * keyword - value pairs that specify the configuration of the partition. 15 */ 16 17 #include <linux/module.h> 18 #include <linux/types.h> 19 #include <linux/errno.h> 20 #include <linux/proc_fs.h> 21 #include <linux/init.h> 22 #include <asm/papr-sysparm.h> 23 #include <linux/seq_file.h> 24 #include <linux/slab.h> 25 #include <linux/uaccess.h> 26 #include <linux/hugetlb.h> 27 #include <asm/lppaca.h> 28 #include <asm/hvcall.h> 29 #include <asm/firmware.h> 30 #include <asm/rtas.h> 31 #include <asm/time.h> 32 #include <asm/vdso_datapage.h> 33 #include <asm/vio.h> 34 #include <asm/mmu.h> 35 #include <asm/machdep.h> 36 #include <asm/drmem.h> 37 38 #include "pseries.h" 39 #include "vas.h" /* pseries_vas_dlpar_cpu() */ 40 41 /* 42 * This isn't a module but we expose that to userspace 43 * via /proc so leave the definitions here 44 */ 45 #define MODULE_VERS "1.9" 46 #define MODULE_NAME "lparcfg" 47 48 /* #define LPARCFG_DEBUG */ 49 50 /* 51 * Track sum of all purrs across all processors. This is used to further 52 * calculate usage values by different applications 53 */ 54 static void cpu_get_purr(void *arg) 55 { 56 atomic64_t *sum = arg; 57 58 atomic64_add(mfspr(SPRN_PURR), sum); 59 } 60 61 static unsigned long get_purr(void) 62 { 63 atomic64_t purr = ATOMIC64_INIT(0); 64 65 on_each_cpu(cpu_get_purr, &purr, 1); 66 67 return atomic64_read(&purr); 68 } 69 70 /* 71 * Methods used to fetch LPAR data when running on a pSeries platform. 72 */ 73 74 struct hvcall_ppp_data { 75 u64 entitlement; 76 u64 unallocated_entitlement; 77 u16 group_num; 78 u16 pool_num; 79 u8 capped; 80 u8 weight; 81 u8 unallocated_weight; 82 u16 active_procs_in_pool; 83 u16 active_system_procs; 84 u16 phys_platform_procs; 85 u32 max_proc_cap_avail; 86 u32 entitled_proc_cap_avail; 87 }; 88 89 /* 90 * H_GET_PPP hcall returns info in 4 parms. 91 * entitled_capacity,unallocated_capacity, 92 * aggregation, resource_capability). 93 * 94 * R4 = Entitled Processor Capacity Percentage. 95 * R5 = Unallocated Processor Capacity Percentage. 96 * R6 (AABBCCDDEEFFGGHH). 97 * XXXX - reserved (0) 98 * XXXX - reserved (0) 99 * XXXX - Group Number 100 * XXXX - Pool Number. 101 * R7 (IIJJKKLLMMNNOOPP). 102 * XX - reserved. (0) 103 * XX - bit 0-6 reserved (0). bit 7 is Capped indicator. 104 * XX - variable processor Capacity Weight 105 * XX - Unallocated Variable Processor Capacity Weight. 106 * XXXX - Active processors in Physical Processor Pool. 107 * XXXX - Processors active on platform. 108 * R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1 109 * XXXX - Physical platform procs allocated to virtualization. 110 * XXXXXX - Max procs capacity % available to the partitions pool. 111 * XXXXXX - Entitled procs capacity % available to the 112 * partitions pool. 113 */ 114 static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data) 115 { 116 unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = {0}; 117 long rc; 118 119 rc = plpar_hcall9(H_GET_PPP, retbuf); 120 121 ppp_data->entitlement = retbuf[0]; 122 ppp_data->unallocated_entitlement = retbuf[1]; 123 124 ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; 125 ppp_data->pool_num = retbuf[2] & 0xffff; 126 127 ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01; 128 ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff; 129 ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff; 130 ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff; 131 ppp_data->active_system_procs = retbuf[3] & 0xffff; 132 133 ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8; 134 ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff; 135 ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff; 136 137 return rc; 138 } 139 140 static void show_gpci_data(struct seq_file *m) 141 { 142 struct hv_gpci_request_buffer *buf; 143 unsigned int affinity_score; 144 long ret; 145 146 buf = kmalloc(sizeof(*buf), GFP_KERNEL); 147 if (buf == NULL) 148 return; 149 150 /* 151 * Show the local LPAR's affinity score. 152 * 153 * 0xB1 selects the Affinity_Domain_Info_By_Partition subcall. 154 * The score is at byte 0xB in the output buffer. 155 */ 156 memset(&buf->params, 0, sizeof(buf->params)); 157 buf->params.counter_request = cpu_to_be32(0xB1); 158 buf->params.starting_index = cpu_to_be32(-1); /* local LPAR */ 159 buf->params.counter_info_version_in = 0x5; /* v5+ for score */ 160 ret = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, virt_to_phys(buf), 161 sizeof(*buf)); 162 if (ret != H_SUCCESS) { 163 pr_debug("hcall failed: H_GET_PERF_COUNTER_INFO: %ld, %x\n", 164 ret, be32_to_cpu(buf->params.detail_rc)); 165 goto out; 166 } 167 affinity_score = buf->bytes[0xB]; 168 seq_printf(m, "partition_affinity_score=%u\n", affinity_score); 169 out: 170 kfree(buf); 171 } 172 173 static long h_pic(unsigned long *pool_idle_time, 174 unsigned long *num_procs) 175 { 176 long rc; 177 unsigned long retbuf[PLPAR_HCALL_BUFSIZE] = {0}; 178 179 rc = plpar_hcall(H_PIC, retbuf); 180 181 if (pool_idle_time) 182 *pool_idle_time = retbuf[0]; 183 if (num_procs) 184 *num_procs = retbuf[1]; 185 186 return rc; 187 } 188 189 unsigned long boot_pool_idle_time; 190 191 /* 192 * parse_ppp_data 193 * Parse out the data returned from h_get_ppp and h_pic 194 */ 195 static void parse_ppp_data(struct seq_file *m) 196 { 197 struct hvcall_ppp_data ppp_data; 198 struct device_node *root; 199 const __be32 *perf_level; 200 long rc; 201 202 rc = h_get_ppp(&ppp_data); 203 if (rc) 204 return; 205 206 seq_printf(m, "partition_entitled_capacity=%lld\n", 207 ppp_data.entitlement); 208 seq_printf(m, "group=%d\n", ppp_data.group_num); 209 seq_printf(m, "system_active_processors=%d\n", 210 ppp_data.active_system_procs); 211 212 /* pool related entries are appropriate for shared configs */ 213 if (lppaca_shared_proc()) { 214 unsigned long pool_idle_time, pool_procs; 215 216 seq_printf(m, "pool=%d\n", ppp_data.pool_num); 217 218 /* report pool_capacity in percentage */ 219 seq_printf(m, "pool_capacity=%d\n", 220 ppp_data.active_procs_in_pool * 100); 221 222 /* In case h_pic call is not successful, this would result in 223 * APP values being wrong in tools like lparstat. 224 */ 225 226 if (h_pic(&pool_idle_time, &pool_procs) == H_SUCCESS) { 227 seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time); 228 seq_printf(m, "pool_num_procs=%ld\n", pool_procs); 229 seq_printf(m, "boot_pool_idle_time=%ld\n", boot_pool_idle_time); 230 } 231 } 232 233 seq_printf(m, "unallocated_capacity_weight=%d\n", 234 ppp_data.unallocated_weight); 235 seq_printf(m, "capacity_weight=%d\n", ppp_data.weight); 236 seq_printf(m, "capped=%d\n", ppp_data.capped); 237 seq_printf(m, "unallocated_capacity=%lld\n", 238 ppp_data.unallocated_entitlement); 239 240 /* The last bits of information returned from h_get_ppp are only 241 * valid if the ibm,partition-performance-parameters-level 242 * property is >= 1. 243 */ 244 root = of_find_node_by_path("/"); 245 if (root) { 246 perf_level = of_get_property(root, 247 "ibm,partition-performance-parameters-level", 248 NULL); 249 if (perf_level && (be32_to_cpup(perf_level) >= 1)) { 250 seq_printf(m, 251 "physical_procs_allocated_to_virtualization=%d\n", 252 ppp_data.phys_platform_procs); 253 seq_printf(m, "max_proc_capacity_available=%d\n", 254 ppp_data.max_proc_cap_avail); 255 seq_printf(m, "entitled_proc_capacity_available=%d\n", 256 ppp_data.entitled_proc_cap_avail); 257 } 258 259 of_node_put(root); 260 } 261 } 262 263 /** 264 * parse_mpp_data 265 * Parse out data returned from h_get_mpp 266 */ 267 static void parse_mpp_data(struct seq_file *m) 268 { 269 struct hvcall_mpp_data mpp_data; 270 int rc; 271 272 rc = h_get_mpp(&mpp_data); 273 if (rc) 274 return; 275 276 seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem); 277 278 if (mpp_data.mapped_mem != -1) 279 seq_printf(m, "mapped_entitled_memory=%ld\n", 280 mpp_data.mapped_mem); 281 282 seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num); 283 seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num); 284 285 seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight); 286 seq_printf(m, "unallocated_entitled_memory_weight=%d\n", 287 mpp_data.unallocated_mem_weight); 288 seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n", 289 mpp_data.unallocated_entitlement); 290 291 if (mpp_data.pool_size != -1) 292 seq_printf(m, "entitled_memory_pool_size=%ld bytes\n", 293 mpp_data.pool_size); 294 295 seq_printf(m, "entitled_memory_loan_request=%ld\n", 296 mpp_data.loan_request); 297 298 seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem); 299 } 300 301 /** 302 * parse_mpp_x_data 303 * Parse out data returned from h_get_mpp_x 304 */ 305 static void parse_mpp_x_data(struct seq_file *m) 306 { 307 struct hvcall_mpp_x_data mpp_x_data; 308 309 if (!firmware_has_feature(FW_FEATURE_XCMO)) 310 return; 311 if (h_get_mpp_x(&mpp_x_data)) 312 return; 313 314 seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes); 315 316 if (mpp_x_data.pool_coalesced_bytes) 317 seq_printf(m, "pool_coalesced_bytes=%ld\n", 318 mpp_x_data.pool_coalesced_bytes); 319 if (mpp_x_data.pool_purr_cycles) 320 seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles); 321 if (mpp_x_data.pool_spurr_cycles) 322 seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles); 323 } 324 325 /* 326 * Read the lpar name using the RTAS ibm,get-system-parameter call. 327 * 328 * The name read through this call is updated if changes are made by the end 329 * user on the hypervisor side. 330 * 331 * Some hypervisor (like Qemu) may not provide this value. In that case, a non 332 * null value is returned. 333 */ 334 static int read_rtas_lpar_name(struct seq_file *m) 335 { 336 struct papr_sysparm_buf *buf; 337 int err; 338 339 buf = papr_sysparm_buf_alloc(); 340 if (!buf) 341 return -ENOMEM; 342 343 err = papr_sysparm_get(PAPR_SYSPARM_LPAR_NAME, buf); 344 if (!err) 345 seq_printf(m, "partition_name=%s\n", buf->val); 346 347 papr_sysparm_buf_free(buf); 348 return err; 349 } 350 351 /* 352 * Read the LPAR name from the Device Tree. 353 * 354 * The value read in the DT is not updated if the end-user is touching the LPAR 355 * name on the hypervisor side. 356 */ 357 static int read_dt_lpar_name(struct seq_file *m) 358 { 359 struct device_node *root = of_find_node_by_path("/"); 360 const char *name; 361 int ret; 362 363 ret = of_property_read_string(root, "ibm,partition-name", &name); 364 of_node_put(root); 365 if (ret) 366 return -ENOENT; 367 368 seq_printf(m, "partition_name=%s\n", name); 369 return 0; 370 } 371 372 static void read_lpar_name(struct seq_file *m) 373 { 374 if (read_rtas_lpar_name(m) && read_dt_lpar_name(m)) 375 pr_err_once("Error can't get the LPAR name"); 376 } 377 378 #define SPLPAR_MAXLENGTH 1026*(sizeof(char)) 379 380 /* 381 * parse_system_parameter_string() 382 * Retrieve the potential_processors, max_entitled_capacity and friends 383 * through the get-system-parameter rtas call. Replace keyword strings as 384 * necessary. 385 */ 386 static void parse_system_parameter_string(struct seq_file *m) 387 { 388 struct papr_sysparm_buf *buf; 389 390 buf = papr_sysparm_buf_alloc(); 391 if (!buf) 392 return; 393 394 if (papr_sysparm_get(PAPR_SYSPARM_SHARED_PROC_LPAR_ATTRS, buf)) { 395 goto out_free; 396 } else { 397 const char *local_buffer; 398 int splpar_strlen; 399 int idx, w_idx; 400 char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); 401 402 if (!workbuffer) 403 goto out_free; 404 405 splpar_strlen = be16_to_cpu(buf->len); 406 local_buffer = buf->val; 407 408 w_idx = 0; 409 idx = 0; 410 while ((*local_buffer) && (idx < splpar_strlen)) { 411 workbuffer[w_idx++] = local_buffer[idx++]; 412 if ((local_buffer[idx] == ',') 413 || (local_buffer[idx] == '\0')) { 414 workbuffer[w_idx] = '\0'; 415 if (w_idx) { 416 /* avoid the empty string */ 417 seq_printf(m, "%s\n", workbuffer); 418 } 419 memset(workbuffer, 0, SPLPAR_MAXLENGTH); 420 idx++; /* skip the comma */ 421 w_idx = 0; 422 } else if (local_buffer[idx] == '=') { 423 /* code here to replace workbuffer contents 424 with different keyword strings */ 425 if (0 == strcmp(workbuffer, "MaxEntCap")) { 426 strcpy(workbuffer, 427 "partition_max_entitled_capacity"); 428 w_idx = strlen(workbuffer); 429 } 430 if (0 == strcmp(workbuffer, "MaxPlatProcs")) { 431 strcpy(workbuffer, 432 "system_potential_processors"); 433 w_idx = strlen(workbuffer); 434 } 435 } 436 } 437 kfree(workbuffer); 438 local_buffer -= 2; /* back up over strlen value */ 439 } 440 out_free: 441 papr_sysparm_buf_free(buf); 442 } 443 444 /* Return the number of processors in the system. 445 * This function reads through the device tree and counts 446 * the virtual processors, this does not include threads. 447 */ 448 static int lparcfg_count_active_processors(void) 449 { 450 struct device_node *cpus_dn; 451 int count = 0; 452 453 for_each_node_by_type(cpus_dn, "cpu") { 454 #ifdef LPARCFG_DEBUG 455 printk(KERN_ERR "cpus_dn %p\n", cpus_dn); 456 #endif 457 count++; 458 } 459 return count; 460 } 461 462 static void pseries_cmo_data(struct seq_file *m) 463 { 464 int cpu; 465 unsigned long cmo_faults = 0; 466 unsigned long cmo_fault_time = 0; 467 468 seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO)); 469 470 if (!firmware_has_feature(FW_FEATURE_CMO)) 471 return; 472 473 for_each_possible_cpu(cpu) { 474 cmo_faults += be64_to_cpu(lppaca_of(cpu).cmo_faults); 475 cmo_fault_time += be64_to_cpu(lppaca_of(cpu).cmo_fault_time); 476 } 477 478 seq_printf(m, "cmo_faults=%lu\n", cmo_faults); 479 seq_printf(m, "cmo_fault_time_usec=%lu\n", 480 cmo_fault_time / tb_ticks_per_usec); 481 seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp()); 482 seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp()); 483 seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size()); 484 } 485 486 static void splpar_dispatch_data(struct seq_file *m) 487 { 488 int cpu; 489 unsigned long dispatches = 0; 490 unsigned long dispatch_dispersions = 0; 491 492 for_each_possible_cpu(cpu) { 493 dispatches += be32_to_cpu(lppaca_of(cpu).yield_count); 494 dispatch_dispersions += 495 be32_to_cpu(lppaca_of(cpu).dispersion_count); 496 } 497 498 seq_printf(m, "dispatches=%lu\n", dispatches); 499 seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions); 500 } 501 502 static void parse_em_data(struct seq_file *m) 503 { 504 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 505 506 if (firmware_has_feature(FW_FEATURE_LPAR) && 507 plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS) 508 seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]); 509 } 510 511 static void maxmem_data(struct seq_file *m) 512 { 513 unsigned long maxmem = 0; 514 515 maxmem += (unsigned long)drmem_info->n_lmbs * drmem_info->lmb_size; 516 maxmem += hugetlb_total_pages() * PAGE_SIZE; 517 518 seq_printf(m, "MaxMem=%lu\n", maxmem); 519 } 520 521 static int pseries_lparcfg_data(struct seq_file *m, void *v) 522 { 523 int partition_potential_processors; 524 int partition_active_processors; 525 struct device_node *rtas_node; 526 const __be32 *lrdrp = NULL; 527 528 rtas_node = of_find_node_by_path("/rtas"); 529 if (rtas_node) 530 lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL); 531 532 if (lrdrp == NULL) { 533 partition_potential_processors = vdso_data->processorCount; 534 } else { 535 partition_potential_processors = be32_to_cpup(lrdrp + 4); 536 } 537 of_node_put(rtas_node); 538 539 partition_active_processors = lparcfg_count_active_processors(); 540 541 if (firmware_has_feature(FW_FEATURE_SPLPAR)) { 542 /* this call handles the ibm,get-system-parameter contents */ 543 read_lpar_name(m); 544 parse_system_parameter_string(m); 545 parse_ppp_data(m); 546 parse_mpp_data(m); 547 parse_mpp_x_data(m); 548 pseries_cmo_data(m); 549 splpar_dispatch_data(m); 550 551 seq_printf(m, "purr=%ld\n", get_purr()); 552 seq_printf(m, "tbr=%ld\n", mftb()); 553 } else { /* non SPLPAR case */ 554 555 seq_printf(m, "system_active_processors=%d\n", 556 partition_potential_processors); 557 558 seq_printf(m, "system_potential_processors=%d\n", 559 partition_potential_processors); 560 561 seq_printf(m, "partition_max_entitled_capacity=%d\n", 562 partition_potential_processors * 100); 563 564 seq_printf(m, "partition_entitled_capacity=%d\n", 565 partition_active_processors * 100); 566 } 567 568 show_gpci_data(m); 569 570 seq_printf(m, "partition_active_processors=%d\n", 571 partition_active_processors); 572 573 seq_printf(m, "partition_potential_processors=%d\n", 574 partition_potential_processors); 575 576 seq_printf(m, "shared_processor_mode=%d\n", 577 lppaca_shared_proc()); 578 579 #ifdef CONFIG_PPC_64S_HASH_MMU 580 if (!radix_enabled()) 581 seq_printf(m, "slb_size=%d\n", mmu_slb_size); 582 #endif 583 parse_em_data(m); 584 maxmem_data(m); 585 586 seq_printf(m, "security_flavor=%u\n", pseries_security_flavor); 587 588 return 0; 589 } 590 591 static ssize_t update_ppp(u64 *entitlement, u8 *weight) 592 { 593 struct hvcall_ppp_data ppp_data; 594 u8 new_weight; 595 u64 new_entitled; 596 ssize_t retval; 597 598 /* Get our current parameters */ 599 retval = h_get_ppp(&ppp_data); 600 if (retval) 601 return retval; 602 603 if (entitlement) { 604 new_weight = ppp_data.weight; 605 new_entitled = *entitlement; 606 } else if (weight) { 607 new_weight = *weight; 608 new_entitled = ppp_data.entitlement; 609 } else 610 return -EINVAL; 611 612 pr_debug("%s: current_entitled = %llu, current_weight = %u\n", 613 __func__, ppp_data.entitlement, ppp_data.weight); 614 615 pr_debug("%s: new_entitled = %llu, new_weight = %u\n", 616 __func__, new_entitled, new_weight); 617 618 retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight); 619 return retval; 620 } 621 622 /** 623 * update_mpp 624 * 625 * Update the memory entitlement and weight for the partition. Caller must 626 * specify either a new entitlement or weight, not both, to be updated 627 * since the h_set_mpp call takes both entitlement and weight as parameters. 628 */ 629 static ssize_t update_mpp(u64 *entitlement, u8 *weight) 630 { 631 struct hvcall_mpp_data mpp_data; 632 u64 new_entitled; 633 u8 new_weight; 634 ssize_t rc; 635 636 if (entitlement) { 637 /* Check with vio to ensure the new memory entitlement 638 * can be handled. 639 */ 640 rc = vio_cmo_entitlement_update(*entitlement); 641 if (rc) 642 return rc; 643 } 644 645 rc = h_get_mpp(&mpp_data); 646 if (rc) 647 return rc; 648 649 if (entitlement) { 650 new_weight = mpp_data.mem_weight; 651 new_entitled = *entitlement; 652 } else if (weight) { 653 new_weight = *weight; 654 new_entitled = mpp_data.entitled_mem; 655 } else 656 return -EINVAL; 657 658 pr_debug("%s: current_entitled = %lu, current_weight = %u\n", 659 __func__, mpp_data.entitled_mem, mpp_data.mem_weight); 660 661 pr_debug("%s: new_entitled = %llu, new_weight = %u\n", 662 __func__, new_entitled, new_weight); 663 664 rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight); 665 return rc; 666 } 667 668 /* 669 * Interface for changing system parameters (variable capacity weight 670 * and entitled capacity). Format of input is "param_name=value"; 671 * anything after value is ignored. Valid parameters at this time are 672 * "partition_entitled_capacity" and "capacity_weight". We use 673 * H_SET_PPP to alter parameters. 674 * 675 * This function should be invoked only on systems with 676 * FW_FEATURE_SPLPAR. 677 */ 678 static ssize_t lparcfg_write(struct file *file, const char __user * buf, 679 size_t count, loff_t * off) 680 { 681 char kbuf[64]; 682 char *tmp; 683 u64 new_entitled, *new_entitled_ptr = &new_entitled; 684 u8 new_weight, *new_weight_ptr = &new_weight; 685 ssize_t retval; 686 687 if (!firmware_has_feature(FW_FEATURE_SPLPAR)) 688 return -EINVAL; 689 690 if (count > sizeof(kbuf)) 691 return -EINVAL; 692 693 if (copy_from_user(kbuf, buf, count)) 694 return -EFAULT; 695 696 kbuf[count - 1] = '\0'; 697 tmp = strchr(kbuf, '='); 698 if (!tmp) 699 return -EINVAL; 700 701 *tmp++ = '\0'; 702 703 if (!strcmp(kbuf, "partition_entitled_capacity")) { 704 char *endp; 705 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); 706 if (endp == tmp) 707 return -EINVAL; 708 709 retval = update_ppp(new_entitled_ptr, NULL); 710 711 if (retval == H_SUCCESS || retval == H_CONSTRAINED) { 712 /* 713 * The hypervisor assigns VAS resources based 714 * on entitled capacity for shared mode. 715 * Reconfig VAS windows based on DLPAR CPU events. 716 */ 717 if (pseries_vas_dlpar_cpu() != 0) 718 retval = H_HARDWARE; 719 } 720 } else if (!strcmp(kbuf, "capacity_weight")) { 721 char *endp; 722 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); 723 if (endp == tmp) 724 return -EINVAL; 725 726 retval = update_ppp(NULL, new_weight_ptr); 727 } else if (!strcmp(kbuf, "entitled_memory")) { 728 char *endp; 729 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); 730 if (endp == tmp) 731 return -EINVAL; 732 733 retval = update_mpp(new_entitled_ptr, NULL); 734 } else if (!strcmp(kbuf, "entitled_memory_weight")) { 735 char *endp; 736 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); 737 if (endp == tmp) 738 return -EINVAL; 739 740 retval = update_mpp(NULL, new_weight_ptr); 741 } else 742 return -EINVAL; 743 744 if (retval == H_SUCCESS || retval == H_CONSTRAINED) { 745 retval = count; 746 } else if (retval == H_BUSY) { 747 retval = -EBUSY; 748 } else if (retval == H_HARDWARE) { 749 retval = -EIO; 750 } else if (retval == H_PARAMETER) { 751 retval = -EINVAL; 752 } 753 754 return retval; 755 } 756 757 static int lparcfg_data(struct seq_file *m, void *v) 758 { 759 struct device_node *rootdn; 760 const char *model = ""; 761 const char *system_id = ""; 762 const char *tmp; 763 const __be32 *lp_index_ptr; 764 unsigned int lp_index = 0; 765 766 seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS); 767 768 rootdn = of_find_node_by_path("/"); 769 if (rootdn) { 770 tmp = of_get_property(rootdn, "model", NULL); 771 if (tmp) 772 model = tmp; 773 tmp = of_get_property(rootdn, "system-id", NULL); 774 if (tmp) 775 system_id = tmp; 776 lp_index_ptr = of_get_property(rootdn, "ibm,partition-no", 777 NULL); 778 if (lp_index_ptr) 779 lp_index = be32_to_cpup(lp_index_ptr); 780 of_node_put(rootdn); 781 } 782 seq_printf(m, "serial_number=%s\n", system_id); 783 seq_printf(m, "system_type=%s\n", model); 784 seq_printf(m, "partition_id=%d\n", (int)lp_index); 785 786 return pseries_lparcfg_data(m, v); 787 } 788 789 static int lparcfg_open(struct inode *inode, struct file *file) 790 { 791 return single_open(file, lparcfg_data, NULL); 792 } 793 794 static const struct proc_ops lparcfg_proc_ops = { 795 .proc_read = seq_read, 796 .proc_write = lparcfg_write, 797 .proc_open = lparcfg_open, 798 .proc_release = single_release, 799 .proc_lseek = seq_lseek, 800 }; 801 802 static int __init lparcfg_init(void) 803 { 804 umode_t mode = 0444; 805 long retval; 806 807 /* Allow writing if we have FW_FEATURE_SPLPAR */ 808 if (firmware_has_feature(FW_FEATURE_SPLPAR)) 809 mode |= 0200; 810 811 if (!proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_proc_ops)) { 812 printk(KERN_ERR "Failed to create powerpc/lparcfg\n"); 813 return -EIO; 814 } 815 816 /* If this call fails, it would result in APP values 817 * being wrong for since boot reports of lparstat 818 */ 819 retval = h_pic(&boot_pool_idle_time, NULL); 820 821 if (retval != H_SUCCESS) 822 pr_debug("H_PIC failed during lparcfg init retval: %ld\n", 823 retval); 824 825 return 0; 826 } 827 machine_device_initcall(pseries, lparcfg_init); 828