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