arch/powerpc/platforms/pseries/lparcfg.c

   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 <linux/seq_file.h>
  23 #include <linux/slab.h>
  24 #include <linux/uaccess.h>
  25 #include <linux/hugetlb.h>
  26 #include <asm/lppaca.h>
  27 #include <asm/hvcall.h>
  28 #include <asm/firmware.h>
  29 #include <asm/rtas.h>
  30 #include <asm/time.h>
  31 #include <asm/vdso_datapage.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
  39 /*
  40  * This isn't a module but we expose that to userspace
  41  * via /proc so leave the definitions here
  42  */
  43 #define MODULE_VERS "1.9"
  44 #define MODULE_NAME "lparcfg"
  45
  46 /* #define LPARCFG_DEBUG */
  47
  48 /*
  49  * Track sum of all purrs across all processors. This is used to further
  50  * calculate usage values by different applications
  51  */
  52 static void cpu_get_purr(void *arg)
  53 {
  54         atomic64_t *sum = arg;
  55
  56         atomic64_add(mfspr(SPRN_PURR), sum);
  57 }
  58
  59 static unsigned long get_purr(void)
  60 {
  61         atomic64_t purr = ATOMIC64_INIT(0);
  62
  63         on_each_cpu(cpu_get_purr, &purr, 1);
  64
  65         return atomic64_read(&purr);
  66 }
  67
  68 /*
  69  * Methods used to fetch LPAR data when running on a pSeries platform.
  70  */
  71
  72 struct hvcall_ppp_data {
  73         u64     entitlement;
  74         u64     unallocated_entitlement;
  75         u16     group_num;
  76         u16     pool_num;
  77         u8      capped;
  78         u8      weight;
  79         u8      unallocated_weight;
  80         u16     active_procs_in_pool;
  81         u16     active_system_procs;
  82         u16     phys_platform_procs;
  83         u32     max_proc_cap_avail;
  84         u32     entitled_proc_cap_avail;
  85 };
  86
  87 /*
  88  * H_GET_PPP hcall returns info in 4 parms.
  89  *  entitled_capacity,unallocated_capacity,
  90  *  aggregation, resource_capability).
  91  *
  92  *  R4 = Entitled Processor Capacity Percentage.
  93  *  R5 = Unallocated Processor Capacity Percentage.
  94  *  R6 (AABBCCDDEEFFGGHH).
  95  *      XXXX - reserved (0)
  96  *          XXXX - reserved (0)
  97  *              XXXX - Group Number
  98  *                  XXXX - Pool Number.
  99  *  R7 (IIJJKKLLMMNNOOPP).
 100  *      XX - reserved. (0)
 101  *        XX - bit 0-6 reserved (0).   bit 7 is Capped indicator.
 102  *          XX - variable processor Capacity Weight
 103  *            XX - Unallocated Variable Processor Capacity Weight.
 104  *              XXXX - Active processors in Physical Processor Pool.
 105  *                  XXXX  - Processors active on platform.
 106  *  R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1
 107  *      XXXX - Physical platform procs allocated to virtualization.
 108  *          XXXXXX - Max procs capacity % available to the partitions pool.
 109  *                XXXXXX - Entitled procs capacity % available to the
 110  *                         partitions pool.
 111  */
 112 static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
 113 {
 114         unsigned long rc;
 115         unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
 116
 117         rc = plpar_hcall9(H_GET_PPP, retbuf);
 118
 119         ppp_data->entitlement = retbuf[0];
 120         ppp_data->unallocated_entitlement = retbuf[1];
 121
 122         ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
 123         ppp_data->pool_num = retbuf[2] & 0xffff;
 124
 125         ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01;
 126         ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff;
 127         ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff;
 128         ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff;
 129         ppp_data->active_system_procs = retbuf[3] & 0xffff;
 130
 131         ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8;
 132         ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff;
 133         ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff;
 134
 135         return rc;
 136 }
 137
 138 static void show_gpci_data(struct seq_file *m)
 139 {
 140         struct hv_gpci_request_buffer *buf;
 141         unsigned int affinity_score;
 142         long ret;
 143
 144         buf = kmalloc(sizeof(*buf), GFP_KERNEL);
 145         if (buf == NULL)
 146                 return;
 147
 148         /*
 149          * Show the local LPAR's affinity score.
 150          *
 151          * 0xB1 selects the Affinity_Domain_Info_By_Partition subcall.
 152          * The score is at byte 0xB in the output buffer.
 153          */
 154         memset(&buf->params, 0, sizeof(buf->params));
 155         buf->params.counter_request = cpu_to_be32(0xB1);
 156         buf->params.starting_index = cpu_to_be32(-1);   /* local LPAR */
 157         buf->params.counter_info_version_in = 0x5;      /* v5+ for score */
 158         ret = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, virt_to_phys(buf),
 159                                  sizeof(*buf));
 160         if (ret != H_SUCCESS) {
 161                 pr_debug("hcall failed: H_GET_PERF_COUNTER_INFO: %ld, %x\n",
 162                          ret, be32_to_cpu(buf->params.detail_rc));
 163                 goto out;
 164         }
 165         affinity_score = buf->bytes[0xB];
 166         seq_printf(m, "partition_affinity_score=%u\n", affinity_score);
 167 out:
 168         kfree(buf);
 169 }
 170
 171 static unsigned h_pic(unsigned long *pool_idle_time,
 172                       unsigned long *num_procs)
 173 {
 174         unsigned long rc;
 175         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 176
 177         rc = plpar_hcall(H_PIC, retbuf);
 178
 179         *pool_idle_time = retbuf[0];
 180         *num_procs = retbuf[1];
 181
 182         return rc;
 183 }
 184
 185 /*
 186  * parse_ppp_data
 187  * Parse out the data returned from h_get_ppp and h_pic
 188  */
 189 static void parse_ppp_data(struct seq_file *m)
 190 {
 191         struct hvcall_ppp_data ppp_data;
 192         struct device_node *root;
 193         const __be32 *perf_level;
 194         int rc;
 195
 196         rc = h_get_ppp(&ppp_data);
 197         if (rc)
 198                 return;
 199
 200         seq_printf(m, "partition_entitled_capacity=%lld\n",
 201                    ppp_data.entitlement);
 202         seq_printf(m, "group=%d\n", ppp_data.group_num);
 203         seq_printf(m, "system_active_processors=%d\n",
 204                    ppp_data.active_system_procs);
 205
 206         /* pool related entries are appropriate for shared configs */
 207         if (lppaca_shared_proc(get_lppaca())) {
 208                 unsigned long pool_idle_time, pool_procs;
 209
 210                 seq_printf(m, "pool=%d\n", ppp_data.pool_num);
 211
 212                 /* report pool_capacity in percentage */
 213                 seq_printf(m, "pool_capacity=%d\n",
 214                            ppp_data.active_procs_in_pool * 100);
 215
 216                 h_pic(&pool_idle_time, &pool_procs);
 217                 seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
 218                 seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
 219         }
 220
 221         seq_printf(m, "unallocated_capacity_weight=%d\n",
 222                    ppp_data.unallocated_weight);
 223         seq_printf(m, "capacity_weight=%d\n", ppp_data.weight);
 224         seq_printf(m, "capped=%d\n", ppp_data.capped);
 225         seq_printf(m, "unallocated_capacity=%lld\n",
 226                    ppp_data.unallocated_entitlement);
 227
 228         /* The last bits of information returned from h_get_ppp are only
 229          * valid if the ibm,partition-performance-parameters-level
 230          * property is >= 1.
 231          */
 232         root = of_find_node_by_path("/");
 233         if (root) {
 234                 perf_level = of_get_property(root,
 235                                 "ibm,partition-performance-parameters-level",
 236                                              NULL);
 237                 if (perf_level && (be32_to_cpup(perf_level) >= 1)) {
 238                         seq_printf(m,
 239                             "physical_procs_allocated_to_virtualization=%d\n",
 240                                    ppp_data.phys_platform_procs);
 241                         seq_printf(m, "max_proc_capacity_available=%d\n",
 242                                    ppp_data.max_proc_cap_avail);
 243                         seq_printf(m, "entitled_proc_capacity_available=%d\n",
 244                                    ppp_data.entitled_proc_cap_avail);
 245                 }
 246
 247                 of_node_put(root);
 248         }
 249 }
 250
 251 /**
 252  * parse_mpp_data
 253  * Parse out data returned from h_get_mpp
 254  */
 255 static void parse_mpp_data(struct seq_file *m)
 256 {
 257         struct hvcall_mpp_data mpp_data;
 258         int rc;
 259
 260         rc = h_get_mpp(&mpp_data);
 261         if (rc)
 262                 return;
 263
 264         seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem);
 265
 266         if (mpp_data.mapped_mem != -1)
 267                 seq_printf(m, "mapped_entitled_memory=%ld\n",
 268                            mpp_data.mapped_mem);
 269
 270         seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num);
 271         seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num);
 272
 273         seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight);
 274         seq_printf(m, "unallocated_entitled_memory_weight=%d\n",
 275                    mpp_data.unallocated_mem_weight);
 276         seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n",
 277                    mpp_data.unallocated_entitlement);
 278
 279         if (mpp_data.pool_size != -1)
 280                 seq_printf(m, "entitled_memory_pool_size=%ld bytes\n",
 281                            mpp_data.pool_size);
 282
 283         seq_printf(m, "entitled_memory_loan_request=%ld\n",
 284                    mpp_data.loan_request);
 285
 286         seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem);
 287 }
 288
 289 /**
 290  * parse_mpp_x_data
 291  * Parse out data returned from h_get_mpp_x
 292  */
 293 static void parse_mpp_x_data(struct seq_file *m)
 294 {
 295         struct hvcall_mpp_x_data mpp_x_data;
 296
 297         if (!firmware_has_feature(FW_FEATURE_XCMO))
 298                 return;
 299         if (h_get_mpp_x(&mpp_x_data))
 300                 return;
 301
 302         seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes);
 303
 304         if (mpp_x_data.pool_coalesced_bytes)
 305                 seq_printf(m, "pool_coalesced_bytes=%ld\n",
 306                            mpp_x_data.pool_coalesced_bytes);
 307         if (mpp_x_data.pool_purr_cycles)
 308                 seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles);
 309         if (mpp_x_data.pool_spurr_cycles)
 310                 seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles);
 311 }
 312
 313 /*
 314  * PAPR defines, in section "7.3.16 System Parameters Option", the token 55 to
 315  * read the LPAR name, and the largest output data to 4000 + 2 bytes length.
 316  */
 317 #define SPLPAR_LPAR_NAME_TOKEN  55
 318 #define GET_SYS_PARM_BUF_SIZE   4002
 319 #if GET_SYS_PARM_BUF_SIZE > RTAS_DATA_BUF_SIZE
 320 #error "GET_SYS_PARM_BUF_SIZE is larger than RTAS_DATA_BUF_SIZE"
 321 #endif
 322
 323 /*
 324  * Read the lpar name using the RTAS ibm,get-system-parameter call.
 325  *
 326  * The name read through this call is updated if changes are made by the end
 327  * user on the hypervisor side.
 328  *
 329  * Some hypervisor (like Qemu) may not provide this value. In that case, a non
 330  * null value is returned.
 331  */
 332 static int read_rtas_lpar_name(struct seq_file *m)
 333 {
 334         int rc, len, token;
 335         union {
 336                 char raw_buffer[GET_SYS_PARM_BUF_SIZE];
 337                 struct {
 338                         __be16 len;
 339                         char name[GET_SYS_PARM_BUF_SIZE-2];
 340                 };
 341         } *local_buffer;
 342
 343         token = rtas_token("ibm,get-system-parameter");
 344         if (token == RTAS_UNKNOWN_SERVICE)
 345                 return -EINVAL;
 346
 347         local_buffer = kmalloc(sizeof(*local_buffer), GFP_KERNEL);
 348         if (!local_buffer)
 349                 return -ENOMEM;
 350
 351         do {
 352                 spin_lock(&rtas_data_buf_lock);
 353                 memset(rtas_data_buf, 0, sizeof(*local_buffer));
 354                 rc = rtas_call(token, 3, 1, NULL, SPLPAR_LPAR_NAME_TOKEN,
 355                                __pa(rtas_data_buf), sizeof(*local_buffer));
 356                 if (!rc)
 357                         memcpy(local_buffer->raw_buffer, rtas_data_buf,
 358                                sizeof(local_buffer->raw_buffer));
 359                 spin_unlock(&rtas_data_buf_lock);
 360         } while (rtas_busy_delay(rc));
 361
 362         if (!rc) {
 363                 /* Force end of string */
 364                 len = min((int) be16_to_cpu(local_buffer->len),
 365                           (int) sizeof(local_buffer->name)-1);
 366                 local_buffer->name[len] = '\0';
 367
 368                 seq_printf(m, "partition_name=%s\n", local_buffer->name);
 369         } else
 370                 rc = -ENODATA;
 371
 372         kfree(local_buffer);
 373         return rc;
 374 }
 375
 376 /*
 377  * Read the LPAR name from the Device Tree.
 378  *
 379  * The value read in the DT is not updated if the end-user is touching the LPAR
 380  * name on the hypervisor side.
 381  */
 382 static int read_dt_lpar_name(struct seq_file *m)
 383 {
 384         const char *name;
 385
 386         if (of_property_read_string(of_root, "ibm,partition-name", &name))
 387                 return -ENOENT;
 388
 389         seq_printf(m, "partition_name=%s\n", name);
 390         return 0;
 391 }
 392
 393 static void read_lpar_name(struct seq_file *m)
 394 {
 395         if (read_rtas_lpar_name(m) && read_dt_lpar_name(m))
 396                 pr_err_once("Error can't get the LPAR name");
 397 }
 398
 399 #define SPLPAR_CHARACTERISTICS_TOKEN 20
 400 #define SPLPAR_MAXLENGTH 1026*(sizeof(char))
 401
 402 /*
 403  * parse_system_parameter_string()
 404  * Retrieve the potential_processors, max_entitled_capacity and friends
 405  * through the get-system-parameter rtas call.  Replace keyword strings as
 406  * necessary.
 407  */
 408 static void parse_system_parameter_string(struct seq_file *m)
 409 {
 410         int call_status;
 411
 412         unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
 413         if (!local_buffer) {
 414                 printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
 415                        __FILE__, __func__, __LINE__);
 416                 return;
 417         }
 418
 419         spin_lock(&rtas_data_buf_lock);
 420         memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
 421         call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
 422                                 NULL,
 423                                 SPLPAR_CHARACTERISTICS_TOKEN,
 424                                 __pa(rtas_data_buf),
 425                                 RTAS_DATA_BUF_SIZE);
 426         memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
 427         local_buffer[SPLPAR_MAXLENGTH - 1] = '\0';
 428         spin_unlock(&rtas_data_buf_lock);
 429
 430         if (call_status != 0) {
 431                 printk(KERN_INFO
 432                        "%s %s Error calling get-system-parameter (0x%x)\n",
 433                        __FILE__, __func__, call_status);
 434         } else {
 435                 int splpar_strlen;
 436                 int idx, w_idx;
 437                 char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
 438                 if (!workbuffer) {
 439                         printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
 440                                __FILE__, __func__, __LINE__);
 441                         kfree(local_buffer);
 442                         return;
 443                 }
 444 #ifdef LPARCFG_DEBUG
 445                 printk(KERN_INFO "success calling get-system-parameter\n");
 446 #endif
 447                 splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
 448                 local_buffer += 2;      /* step over strlen value */
 449
 450                 w_idx = 0;
 451                 idx = 0;
 452                 while ((*local_buffer) && (idx < splpar_strlen)) {
 453                         workbuffer[w_idx++] = local_buffer[idx++];
 454                         if ((local_buffer[idx] == ',')
 455                             || (local_buffer[idx] == '\0')) {
 456                                 workbuffer[w_idx] = '\0';
 457                                 if (w_idx) {
 458                                         /* avoid the empty string */
 459                                         seq_printf(m, "%s\n", workbuffer);
 460                                 }
 461                                 memset(workbuffer, 0, SPLPAR_MAXLENGTH);
 462                                 idx++;  /* skip the comma */
 463                                 w_idx = 0;
 464                         } else if (local_buffer[idx] == '=') {
 465                                 /* code here to replace workbuffer contents
 466                                    with different keyword strings */
 467                                 if (0 == strcmp(workbuffer, "MaxEntCap")) {
 468                                         strcpy(workbuffer,
 469                                                "partition_max_entitled_capacity");
 470                                         w_idx = strlen(workbuffer);
 471                                 }
 472                                 if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
 473                                         strcpy(workbuffer,
 474                                                "system_potential_processors");
 475                                         w_idx = strlen(workbuffer);
 476                                 }
 477                         }
 478                 }
 479                 kfree(workbuffer);
 480                 local_buffer -= 2;      /* back up over strlen value */
 481         }
 482         kfree(local_buffer);
 483 }
 484
 485 /* Return the number of processors in the system.
 486  * This function reads through the device tree and counts
 487  * the virtual processors, this does not include threads.
 488  */
 489 static int lparcfg_count_active_processors(void)
 490 {
 491         struct device_node *cpus_dn;
 492         int count = 0;
 493
 494         for_each_node_by_type(cpus_dn, "cpu") {
 495 #ifdef LPARCFG_DEBUG
 496                 printk(KERN_ERR "cpus_dn %p\n", cpus_dn);
 497 #endif
 498                 count++;
 499         }
 500         return count;
 501 }
 502
 503 static void pseries_cmo_data(struct seq_file *m)
 504 {
 505         int cpu;
 506         unsigned long cmo_faults = 0;
 507         unsigned long cmo_fault_time = 0;
 508
 509         seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO));
 510
 511         if (!firmware_has_feature(FW_FEATURE_CMO))
 512                 return;
 513
 514         for_each_possible_cpu(cpu) {
 515                 cmo_faults += be64_to_cpu(lppaca_of(cpu).cmo_faults);
 516                 cmo_fault_time += be64_to_cpu(lppaca_of(cpu).cmo_fault_time);
 517         }
 518
 519         seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
 520         seq_printf(m, "cmo_fault_time_usec=%lu\n",
 521                    cmo_fault_time / tb_ticks_per_usec);
 522         seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp());
 523         seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp());
 524         seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size());
 525 }
 526
 527 static void splpar_dispatch_data(struct seq_file *m)
 528 {
 529         int cpu;
 530         unsigned long dispatches = 0;
 531         unsigned long dispatch_dispersions = 0;
 532
 533         for_each_possible_cpu(cpu) {
 534                 dispatches += be32_to_cpu(lppaca_of(cpu).yield_count);
 535                 dispatch_dispersions +=
 536                         be32_to_cpu(lppaca_of(cpu).dispersion_count);
 537         }
 538
 539         seq_printf(m, "dispatches=%lu\n", dispatches);
 540         seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions);
 541 }
 542
 543 static void parse_em_data(struct seq_file *m)
 544 {
 545         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 546
 547         if (firmware_has_feature(FW_FEATURE_LPAR) &&
 548             plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS)
 549                 seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]);
 550 }
 551
 552 static void maxmem_data(struct seq_file *m)
 553 {
 554         unsigned long maxmem = 0;
 555
 556         maxmem += (unsigned long)drmem_info->n_lmbs * drmem_info->lmb_size;
 557         maxmem += hugetlb_total_pages() * PAGE_SIZE;
 558
 559         seq_printf(m, "MaxMem=%lu\n", maxmem);
 560 }
 561
 562 static int pseries_lparcfg_data(struct seq_file *m, void *v)
 563 {
 564         int partition_potential_processors;
 565         int partition_active_processors;
 566         struct device_node *rtas_node;
 567         const __be32 *lrdrp = NULL;
 568
 569         rtas_node = of_find_node_by_path("/rtas");
 570         if (rtas_node)
 571                 lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
 572
 573         if (lrdrp == NULL) {
 574                 partition_potential_processors = vdso_data->processorCount;
 575         } else {
 576                 partition_potential_processors = be32_to_cpup(lrdrp + 4);
 577         }
 578         of_node_put(rtas_node);
 579
 580         partition_active_processors = lparcfg_count_active_processors();
 581
 582         if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
 583                 /* this call handles the ibm,get-system-parameter contents */
 584                 read_lpar_name(m);
 585                 parse_system_parameter_string(m);
 586                 parse_ppp_data(m);
 587                 parse_mpp_data(m);
 588                 parse_mpp_x_data(m);
 589                 pseries_cmo_data(m);
 590                 splpar_dispatch_data(m);
 591
 592                 seq_printf(m, "purr=%ld\n", get_purr());
 593                 seq_printf(m, "tbr=%ld\n", mftb());
 594         } else {                /* non SPLPAR case */
 595
 596                 seq_printf(m, "system_active_processors=%d\n",
 597                            partition_potential_processors);
 598
 599                 seq_printf(m, "system_potential_processors=%d\n",
 600                            partition_potential_processors);
 601
 602                 seq_printf(m, "partition_max_entitled_capacity=%d\n",
 603                            partition_potential_processors * 100);
 604
 605                 seq_printf(m, "partition_entitled_capacity=%d\n",
 606                            partition_active_processors * 100);
 607         }
 608
 609         show_gpci_data(m);
 610
 611         seq_printf(m, "partition_active_processors=%d\n",
 612                    partition_active_processors);
 613
 614         seq_printf(m, "partition_potential_processors=%d\n",
 615                    partition_potential_processors);
 616
 617         seq_printf(m, "shared_processor_mode=%d\n",
 618                    lppaca_shared_proc(get_lppaca()));
 619
 620 #ifdef CONFIG_PPC_64S_HASH_MMU
 621         if (!radix_enabled())
 622                 seq_printf(m, "slb_size=%d\n", mmu_slb_size);
 623 #endif
 624         parse_em_data(m);
 625         maxmem_data(m);
 626
 627         seq_printf(m, "security_flavor=%u\n", pseries_security_flavor);
 628
 629         return 0;
 630 }
 631
 632 static ssize_t update_ppp(u64 *entitlement, u8 *weight)
 633 {
 634         struct hvcall_ppp_data ppp_data;
 635         u8 new_weight;
 636         u64 new_entitled;
 637         ssize_t retval;
 638
 639         /* Get our current parameters */
 640         retval = h_get_ppp(&ppp_data);
 641         if (retval)
 642                 return retval;
 643
 644         if (entitlement) {
 645                 new_weight = ppp_data.weight;
 646                 new_entitled = *entitlement;
 647         } else if (weight) {
 648                 new_weight = *weight;
 649                 new_entitled = ppp_data.entitlement;
 650         } else
 651                 return -EINVAL;
 652
 653         pr_debug("%s: current_entitled = %llu, current_weight = %u\n",
 654                  __func__, ppp_data.entitlement, ppp_data.weight);
 655
 656         pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
 657                  __func__, new_entitled, new_weight);
 658
 659         retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight);
 660         return retval;
 661 }
 662
 663 /**
 664  * update_mpp
 665  *
 666  * Update the memory entitlement and weight for the partition.  Caller must
 667  * specify either a new entitlement or weight, not both, to be updated
 668  * since the h_set_mpp call takes both entitlement and weight as parameters.
 669  */
 670 static ssize_t update_mpp(u64 *entitlement, u8 *weight)
 671 {
 672         struct hvcall_mpp_data mpp_data;
 673         u64 new_entitled;
 674         u8 new_weight;
 675         ssize_t rc;
 676
 677         if (entitlement) {
 678                 /* Check with vio to ensure the new memory entitlement
 679                  * can be handled.
 680                  */
 681                 rc = vio_cmo_entitlement_update(*entitlement);
 682                 if (rc)
 683                         return rc;
 684         }
 685
 686         rc = h_get_mpp(&mpp_data);
 687         if (rc)
 688                 return rc;
 689
 690         if (entitlement) {
 691                 new_weight = mpp_data.mem_weight;
 692                 new_entitled = *entitlement;
 693         } else if (weight) {
 694                 new_weight = *weight;
 695                 new_entitled = mpp_data.entitled_mem;
 696         } else
 697                 return -EINVAL;
 698
 699         pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
 700                  __func__, mpp_data.entitled_mem, mpp_data.mem_weight);
 701
 702         pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
 703                  __func__, new_entitled, new_weight);
 704
 705         rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight);
 706         return rc;
 707 }
 708
 709 /*
 710  * Interface for changing system parameters (variable capacity weight
 711  * and entitled capacity).  Format of input is "param_name=value";
 712  * anything after value is ignored.  Valid parameters at this time are
 713  * "partition_entitled_capacity" and "capacity_weight".  We use
 714  * H_SET_PPP to alter parameters.
 715  *
 716  * This function should be invoked only on systems with
 717  * FW_FEATURE_SPLPAR.
 718  */
 719 static ssize_t lparcfg_write(struct file *file, const char __user * buf,
 720                              size_t count, loff_t * off)
 721 {
 722         char kbuf[64];
 723         char *tmp;
 724         u64 new_entitled, *new_entitled_ptr = &new_entitled;
 725         u8 new_weight, *new_weight_ptr = &new_weight;
 726         ssize_t retval;
 727
 728         if (!firmware_has_feature(FW_FEATURE_SPLPAR))
 729                 return -EINVAL;
 730
 731         if (count > sizeof(kbuf))
 732                 return -EINVAL;
 733
 734         if (copy_from_user(kbuf, buf, count))
 735                 return -EFAULT;
 736
 737         kbuf[count - 1] = '\0';
 738         tmp = strchr(kbuf, '=');
 739         if (!tmp)
 740                 return -EINVAL;
 741
 742         *tmp++ = '\0';
 743
 744         if (!strcmp(kbuf, "partition_entitled_capacity")) {
 745                 char *endp;
 746                 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
 747                 if (endp == tmp)
 748                         return -EINVAL;
 749
 750                 retval = update_ppp(new_entitled_ptr, NULL);
 751         } else if (!strcmp(kbuf, "capacity_weight")) {
 752                 char *endp;
 753                 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
 754                 if (endp == tmp)
 755                         return -EINVAL;
 756
 757                 retval = update_ppp(NULL, new_weight_ptr);
 758         } else if (!strcmp(kbuf, "entitled_memory")) {
 759                 char *endp;
 760                 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
 761                 if (endp == tmp)
 762                         return -EINVAL;
 763
 764                 retval = update_mpp(new_entitled_ptr, NULL);
 765         } else if (!strcmp(kbuf, "entitled_memory_weight")) {
 766                 char *endp;
 767                 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
 768                 if (endp == tmp)
 769                         return -EINVAL;
 770
 771                 retval = update_mpp(NULL, new_weight_ptr);
 772         } else
 773                 return -EINVAL;
 774
 775         if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
 776                 retval = count;
 777         } else if (retval == H_BUSY) {
 778                 retval = -EBUSY;
 779         } else if (retval == H_HARDWARE) {
 780                 retval = -EIO;
 781         } else if (retval == H_PARAMETER) {
 782                 retval = -EINVAL;
 783         }
 784
 785         return retval;
 786 }
 787
 788 static int lparcfg_data(struct seq_file *m, void *v)
 789 {
 790         struct device_node *rootdn;
 791         const char *model = "";
 792         const char *system_id = "";
 793         const char *tmp;
 794         const __be32 *lp_index_ptr;
 795         unsigned int lp_index = 0;
 796
 797         seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS);
 798
 799         rootdn = of_find_node_by_path("/");
 800         if (rootdn) {
 801                 tmp = of_get_property(rootdn, "model", NULL);
 802                 if (tmp)
 803                         model = tmp;
 804                 tmp = of_get_property(rootdn, "system-id", NULL);
 805                 if (tmp)
 806                         system_id = tmp;
 807                 lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
 808                                         NULL);
 809                 if (lp_index_ptr)
 810                         lp_index = be32_to_cpup(lp_index_ptr);
 811                 of_node_put(rootdn);
 812         }
 813         seq_printf(m, "serial_number=%s\n", system_id);
 814         seq_printf(m, "system_type=%s\n", model);
 815         seq_printf(m, "partition_id=%d\n", (int)lp_index);
 816
 817         return pseries_lparcfg_data(m, v);
 818 }
 819
 820 static int lparcfg_open(struct inode *inode, struct file *file)
 821 {
 822         return single_open(file, lparcfg_data, NULL);
 823 }
 824
 825 static const struct proc_ops lparcfg_proc_ops = {
 826         .proc_read      = seq_read,
 827         .proc_write     = lparcfg_write,
 828         .proc_open      = lparcfg_open,
 829         .proc_release   = single_release,
 830         .proc_lseek     = seq_lseek,
 831 };
 832
 833 static int __init lparcfg_init(void)
 834 {
 835         umode_t mode = 0444;
 836
 837         /* Allow writing if we have FW_FEATURE_SPLPAR */
 838         if (firmware_has_feature(FW_FEATURE_SPLPAR))
 839                 mode |= 0200;
 840
 841         if (!proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_proc_ops)) {
 842                 printk(KERN_ERR "Failed to create powerpc/lparcfg\n");
 843                 return -EIO;
 844         }
 845         return 0;
 846 }
 847 machine_device_initcall(pseries, lparcfg_init);