arch/powerpc/kernel/lparcfg.c

   1 /*
   2  * PowerPC64 LPAR Configuration Information Driver
   3  *
   4  * Dave Engebretsen engebret@us.ibm.com
   5  *    Copyright (c) 2003 Dave Engebretsen
   6  * Will Schmidt willschm@us.ibm.com
   7  *    SPLPAR updates, Copyright (c) 2003 Will Schmidt IBM Corporation.
   8  *    seq_file updates, Copyright (c) 2004 Will Schmidt IBM Corporation.
   9  * Nathan Lynch nathanl@austin.ibm.com
  10  *    Added lparcfg_write, Copyright (C) 2004 Nathan Lynch IBM Corporation.
  11  *
  12  *      This program is free software; you can redistribute it and/or
  13  *      modify it under the terms of the GNU General Public License
  14  *      as published by the Free Software Foundation; either version
  15  *      2 of the License, or (at your option) any later version.
  16  *
  17  * This driver creates a proc file at /proc/ppc64/lparcfg which contains
  18  * keyword - value pairs that specify the configuration of the partition.
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/types.h>
  23 #include <linux/errno.h>
  24 #include <linux/proc_fs.h>
  25 #include <linux/init.h>
  26 #include <linux/seq_file.h>
  27 #include <linux/slab.h>
  28 #include <asm/uaccess.h>
  29 #include <asm/lppaca.h>
  30 #include <asm/hvcall.h>
  31 #include <asm/firmware.h>
  32 #include <asm/rtas.h>
  33 #include <asm/system.h>
  34 #include <asm/time.h>
  35 #include <asm/prom.h>
  36 #include <asm/vdso_datapage.h>
  37 #include <asm/vio.h>
  38 #include <asm/mmu.h>
  39
  40 #define MODULE_VERS "1.9"
  41 #define MODULE_NAME "lparcfg"
  42
  43 /* #define LPARCFG_DEBUG */
  44
  45 static struct proc_dir_entry *proc_ppc64_lparcfg;
  46
  47 /*
  48  * Track sum of all purrs across all processors. This is used to further
  49  * calculate usage values by different applications
  50  */
  51 static unsigned long get_purr(void)
  52 {
  53         unsigned long sum_purr = 0;
  54         int cpu;
  55
  56         for_each_possible_cpu(cpu) {
  57                 struct cpu_usage *cu;
  58
  59                 cu = &per_cpu(cpu_usage_array, cpu);
  60                 sum_purr += cu->current_tb;
  61         }
  62         return sum_purr;
  63 }
  64
  65 /*
  66  * Methods used to fetch LPAR data when running on a pSeries platform.
  67  */
  68
  69 struct hvcall_ppp_data {
  70         u64     entitlement;
  71         u64     unallocated_entitlement;
  72         u16     group_num;
  73         u16     pool_num;
  74         u8      capped;
  75         u8      weight;
  76         u8      unallocated_weight;
  77         u16     active_procs_in_pool;
  78         u16     active_system_procs;
  79         u16     phys_platform_procs;
  80         u32     max_proc_cap_avail;
  81         u32     entitled_proc_cap_avail;
  82 };
  83
  84 /*
  85  * H_GET_PPP hcall returns info in 4 parms.
  86  *  entitled_capacity,unallocated_capacity,
  87  *  aggregation, resource_capability).
  88  *
  89  *  R4 = Entitled Processor Capacity Percentage.
  90  *  R5 = Unallocated Processor Capacity Percentage.
  91  *  R6 (AABBCCDDEEFFGGHH).
  92  *      XXXX - reserved (0)
  93  *          XXXX - reserved (0)
  94  *              XXXX - Group Number
  95  *                  XXXX - Pool Number.
  96  *  R7 (IIJJKKLLMMNNOOPP).
  97  *      XX - reserved. (0)
  98  *        XX - bit 0-6 reserved (0).   bit 7 is Capped indicator.
  99  *          XX - variable processor Capacity Weight
 100  *            XX - Unallocated Variable Processor Capacity Weight.
 101  *              XXXX - Active processors in Physical Processor Pool.
 102  *                  XXXX  - Processors active on platform.
 103  *  R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1
 104  *      XXXX - Physical platform procs allocated to virtualization.
 105  *          XXXXXX - Max procs capacity % available to the partitions pool.
 106  *                XXXXXX - Entitled procs capacity % available to the
 107  *                         partitions pool.
 108  */
 109 static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
 110 {
 111         unsigned long rc;
 112         unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
 113
 114         rc = plpar_hcall9(H_GET_PPP, retbuf);
 115
 116         ppp_data->entitlement = retbuf[0];
 117         ppp_data->unallocated_entitlement = retbuf[1];
 118
 119         ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
 120         ppp_data->pool_num = retbuf[2] & 0xffff;
 121
 122         ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01;
 123         ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff;
 124         ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff;
 125         ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff;
 126         ppp_data->active_system_procs = retbuf[3] & 0xffff;
 127
 128         ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8;
 129         ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff;
 130         ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff;
 131
 132         return rc;
 133 }
 134
 135 static unsigned h_pic(unsigned long *pool_idle_time,
 136                       unsigned long *num_procs)
 137 {
 138         unsigned long rc;
 139         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 140
 141         rc = plpar_hcall(H_PIC, retbuf);
 142
 143         *pool_idle_time = retbuf[0];
 144         *num_procs = retbuf[1];
 145
 146         return rc;
 147 }
 148
 149 /*
 150  * parse_ppp_data
 151  * Parse out the data returned from h_get_ppp and h_pic
 152  */
 153 static void parse_ppp_data(struct seq_file *m)
 154 {
 155         struct hvcall_ppp_data ppp_data;
 156         struct device_node *root;
 157         const int *perf_level;
 158         int rc;
 159
 160         rc = h_get_ppp(&ppp_data);
 161         if (rc)
 162                 return;
 163
 164         seq_printf(m, "partition_entitled_capacity=%lld\n",
 165                    ppp_data.entitlement);
 166         seq_printf(m, "group=%d\n", ppp_data.group_num);
 167         seq_printf(m, "system_active_processors=%d\n",
 168                    ppp_data.active_system_procs);
 169
 170         /* pool related entries are appropriate for shared configs */
 171         if (lppaca_of(0).shared_proc) {
 172                 unsigned long pool_idle_time, pool_procs;
 173
 174                 seq_printf(m, "pool=%d\n", ppp_data.pool_num);
 175
 176                 /* report pool_capacity in percentage */
 177                 seq_printf(m, "pool_capacity=%d\n",
 178                            ppp_data.active_procs_in_pool * 100);
 179
 180                 h_pic(&pool_idle_time, &pool_procs);
 181                 seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
 182                 seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
 183         }
 184
 185         seq_printf(m, "unallocated_capacity_weight=%d\n",
 186                    ppp_data.unallocated_weight);
 187         seq_printf(m, "capacity_weight=%d\n", ppp_data.weight);
 188         seq_printf(m, "capped=%d\n", ppp_data.capped);
 189         seq_printf(m, "unallocated_capacity=%lld\n",
 190                    ppp_data.unallocated_entitlement);
 191
 192         /* The last bits of information returned from h_get_ppp are only
 193          * valid if the ibm,partition-performance-parameters-level
 194          * property is >= 1.
 195          */
 196         root = of_find_node_by_path("/");
 197         if (root) {
 198                 perf_level = of_get_property(root,
 199                                 "ibm,partition-performance-parameters-level",
 200                                              NULL);
 201                 if (perf_level && (*perf_level >= 1)) {
 202                         seq_printf(m,
 203                             "physical_procs_allocated_to_virtualization=%d\n",
 204                                    ppp_data.phys_platform_procs);
 205                         seq_printf(m, "max_proc_capacity_available=%d\n",
 206                                    ppp_data.max_proc_cap_avail);
 207                         seq_printf(m, "entitled_proc_capacity_available=%d\n",
 208                                    ppp_data.entitled_proc_cap_avail);
 209                 }
 210
 211                 of_node_put(root);
 212         }
 213 }
 214
 215 /**
 216  * parse_mpp_data
 217  * Parse out data returned from h_get_mpp
 218  */
 219 static void parse_mpp_data(struct seq_file *m)
 220 {
 221         struct hvcall_mpp_data mpp_data;
 222         int rc;
 223
 224         rc = h_get_mpp(&mpp_data);
 225         if (rc)
 226                 return;
 227
 228         seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem);
 229
 230         if (mpp_data.mapped_mem != -1)
 231                 seq_printf(m, "mapped_entitled_memory=%ld\n",
 232                            mpp_data.mapped_mem);
 233
 234         seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num);
 235         seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num);
 236
 237         seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight);
 238         seq_printf(m, "unallocated_entitled_memory_weight=%d\n",
 239                    mpp_data.unallocated_mem_weight);
 240         seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n",
 241                    mpp_data.unallocated_entitlement);
 242
 243         if (mpp_data.pool_size != -1)
 244                 seq_printf(m, "entitled_memory_pool_size=%ld bytes\n",
 245                            mpp_data.pool_size);
 246
 247         seq_printf(m, "entitled_memory_loan_request=%ld\n",
 248                    mpp_data.loan_request);
 249
 250         seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem);
 251 }
 252
 253 /**
 254  * parse_mpp_x_data
 255  * Parse out data returned from h_get_mpp_x
 256  */
 257 static void parse_mpp_x_data(struct seq_file *m)
 258 {
 259         struct hvcall_mpp_x_data mpp_x_data;
 260
 261         if (!firmware_has_feature(FW_FEATURE_XCMO))
 262                 return;
 263         if (h_get_mpp_x(&mpp_x_data))
 264                 return;
 265
 266         seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes);
 267
 268         if (mpp_x_data.pool_coalesced_bytes)
 269                 seq_printf(m, "pool_coalesced_bytes=%ld\n",
 270                            mpp_x_data.pool_coalesced_bytes);
 271         if (mpp_x_data.pool_purr_cycles)
 272                 seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles);
 273         if (mpp_x_data.pool_spurr_cycles)
 274                 seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles);
 275 }
 276
 277 #define SPLPAR_CHARACTERISTICS_TOKEN 20
 278 #define SPLPAR_MAXLENGTH 1026*(sizeof(char))
 279
 280 /*
 281  * parse_system_parameter_string()
 282  * Retrieve the potential_processors, max_entitled_capacity and friends
 283  * through the get-system-parameter rtas call.  Replace keyword strings as
 284  * necessary.
 285  */
 286 static void parse_system_parameter_string(struct seq_file *m)
 287 {
 288         int call_status;
 289
 290         unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
 291         if (!local_buffer) {
 292                 printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
 293                        __FILE__, __func__, __LINE__);
 294                 return;
 295         }
 296
 297         spin_lock(&rtas_data_buf_lock);
 298         memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
 299         call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
 300                                 NULL,
 301                                 SPLPAR_CHARACTERISTICS_TOKEN,
 302                                 __pa(rtas_data_buf),
 303                                 RTAS_DATA_BUF_SIZE);
 304         memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
 305         spin_unlock(&rtas_data_buf_lock);
 306
 307         if (call_status != 0) {
 308                 printk(KERN_INFO
 309                        "%s %s Error calling get-system-parameter (0x%x)\n",
 310                        __FILE__, __func__, call_status);
 311         } else {
 312                 int splpar_strlen;
 313                 int idx, w_idx;
 314                 char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
 315                 if (!workbuffer) {
 316                         printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
 317                                __FILE__, __func__, __LINE__);
 318                         kfree(local_buffer);
 319                         return;
 320                 }
 321 #ifdef LPARCFG_DEBUG
 322                 printk(KERN_INFO "success calling get-system-parameter\n");
 323 #endif
 324                 splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
 325                 local_buffer += 2;      /* step over strlen value */
 326
 327                 w_idx = 0;
 328                 idx = 0;
 329                 while ((*local_buffer) && (idx < splpar_strlen)) {
 330                         workbuffer[w_idx++] = local_buffer[idx++];
 331                         if ((local_buffer[idx] == ',')
 332                             || (local_buffer[idx] == '\0')) {
 333                                 workbuffer[w_idx] = '\0';
 334                                 if (w_idx) {
 335                                         /* avoid the empty string */
 336                                         seq_printf(m, "%s\n", workbuffer);
 337                                 }
 338                                 memset(workbuffer, 0, SPLPAR_MAXLENGTH);
 339                                 idx++;  /* skip the comma */
 340                                 w_idx = 0;
 341                         } else if (local_buffer[idx] == '=') {
 342                                 /* code here to replace workbuffer contents
 343                                    with different keyword strings */
 344                                 if (0 == strcmp(workbuffer, "MaxEntCap")) {
 345                                         strcpy(workbuffer,
 346                                                "partition_max_entitled_capacity");
 347                                         w_idx = strlen(workbuffer);
 348                                 }
 349                                 if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
 350                                         strcpy(workbuffer,
 351                                                "system_potential_processors");
 352                                         w_idx = strlen(workbuffer);
 353                                 }
 354                         }
 355                 }
 356                 kfree(workbuffer);
 357                 local_buffer -= 2;      /* back up over strlen value */
 358         }
 359         kfree(local_buffer);
 360 }
 361
 362 /* Return the number of processors in the system.
 363  * This function reads through the device tree and counts
 364  * the virtual processors, this does not include threads.
 365  */
 366 static int lparcfg_count_active_processors(void)
 367 {
 368         struct device_node *cpus_dn = NULL;
 369         int count = 0;
 370
 371         while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) {
 372 #ifdef LPARCFG_DEBUG
 373                 printk(KERN_ERR "cpus_dn %p\n", cpus_dn);
 374 #endif
 375                 count++;
 376         }
 377         return count;
 378 }
 379
 380 static void pseries_cmo_data(struct seq_file *m)
 381 {
 382         int cpu;
 383         unsigned long cmo_faults = 0;
 384         unsigned long cmo_fault_time = 0;
 385
 386         seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO));
 387
 388         if (!firmware_has_feature(FW_FEATURE_CMO))
 389                 return;
 390
 391         for_each_possible_cpu(cpu) {
 392                 cmo_faults += lppaca_of(cpu).cmo_faults;
 393                 cmo_fault_time += lppaca_of(cpu).cmo_fault_time;
 394         }
 395
 396         seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
 397         seq_printf(m, "cmo_fault_time_usec=%lu\n",
 398                    cmo_fault_time / tb_ticks_per_usec);
 399         seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp());
 400         seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp());
 401         seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size());
 402 }
 403
 404 static void splpar_dispatch_data(struct seq_file *m)
 405 {
 406         int cpu;
 407         unsigned long dispatches = 0;
 408         unsigned long dispatch_dispersions = 0;
 409
 410         for_each_possible_cpu(cpu) {
 411                 dispatches += lppaca_of(cpu).yield_count;
 412                 dispatch_dispersions += lppaca_of(cpu).dispersion_count;
 413         }
 414
 415         seq_printf(m, "dispatches=%lu\n", dispatches);
 416         seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions);
 417 }
 418
 419 static void parse_em_data(struct seq_file *m)
 420 {
 421         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 422
 423         if (plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS)
 424                 seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]);
 425 }
 426
 427 static int pseries_lparcfg_data(struct seq_file *m, void *v)
 428 {
 429         int partition_potential_processors;
 430         int partition_active_processors;
 431         struct device_node *rtas_node;
 432         const int *lrdrp = NULL;
 433
 434         rtas_node = of_find_node_by_path("/rtas");
 435         if (rtas_node)
 436                 lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
 437
 438         if (lrdrp == NULL) {
 439                 partition_potential_processors = vdso_data->processorCount;
 440         } else {
 441                 partition_potential_processors = *(lrdrp + 4);
 442         }
 443         of_node_put(rtas_node);
 444
 445         partition_active_processors = lparcfg_count_active_processors();
 446
 447         if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
 448                 /* this call handles the ibm,get-system-parameter contents */
 449                 parse_system_parameter_string(m);
 450                 parse_ppp_data(m);
 451                 parse_mpp_data(m);
 452                 parse_mpp_x_data(m);
 453                 pseries_cmo_data(m);
 454                 splpar_dispatch_data(m);
 455
 456                 seq_printf(m, "purr=%ld\n", get_purr());
 457         } else {                /* non SPLPAR case */
 458
 459                 seq_printf(m, "system_active_processors=%d\n",
 460                            partition_potential_processors);
 461
 462                 seq_printf(m, "system_potential_processors=%d\n",
 463                            partition_potential_processors);
 464
 465                 seq_printf(m, "partition_max_entitled_capacity=%d\n",
 466                            partition_potential_processors * 100);
 467
 468                 seq_printf(m, "partition_entitled_capacity=%d\n",
 469                            partition_active_processors * 100);
 470         }
 471
 472         seq_printf(m, "partition_active_processors=%d\n",
 473                    partition_active_processors);
 474
 475         seq_printf(m, "partition_potential_processors=%d\n",
 476                    partition_potential_processors);
 477
 478         seq_printf(m, "shared_processor_mode=%d\n", lppaca_of(0).shared_proc);
 479
 480         seq_printf(m, "slb_size=%d\n", mmu_slb_size);
 481
 482         parse_em_data(m);
 483
 484         return 0;
 485 }
 486
 487 static ssize_t update_ppp(u64 *entitlement, u8 *weight)
 488 {
 489         struct hvcall_ppp_data ppp_data;
 490         u8 new_weight;
 491         u64 new_entitled;
 492         ssize_t retval;
 493
 494         /* Get our current parameters */
 495         retval = h_get_ppp(&ppp_data);
 496         if (retval)
 497                 return retval;
 498
 499         if (entitlement) {
 500                 new_weight = ppp_data.weight;
 501                 new_entitled = *entitlement;
 502         } else if (weight) {
 503                 new_weight = *weight;
 504                 new_entitled = ppp_data.entitlement;
 505         } else
 506                 return -EINVAL;
 507
 508         pr_debug("%s: current_entitled = %llu, current_weight = %u\n",
 509                  __func__, ppp_data.entitlement, ppp_data.weight);
 510
 511         pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
 512                  __func__, new_entitled, new_weight);
 513
 514         retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight);
 515         return retval;
 516 }
 517
 518 /**
 519  * update_mpp
 520  *
 521  * Update the memory entitlement and weight for the partition.  Caller must
 522  * specify either a new entitlement or weight, not both, to be updated
 523  * since the h_set_mpp call takes both entitlement and weight as parameters.
 524  */
 525 static ssize_t update_mpp(u64 *entitlement, u8 *weight)
 526 {
 527         struct hvcall_mpp_data mpp_data;
 528         u64 new_entitled;
 529         u8 new_weight;
 530         ssize_t rc;
 531
 532         if (entitlement) {
 533                 /* Check with vio to ensure the new memory entitlement
 534                  * can be handled.
 535                  */
 536                 rc = vio_cmo_entitlement_update(*entitlement);
 537                 if (rc)
 538                         return rc;
 539         }
 540
 541         rc = h_get_mpp(&mpp_data);
 542         if (rc)
 543                 return rc;
 544
 545         if (entitlement) {
 546                 new_weight = mpp_data.mem_weight;
 547                 new_entitled = *entitlement;
 548         } else if (weight) {
 549                 new_weight = *weight;
 550                 new_entitled = mpp_data.entitled_mem;
 551         } else
 552                 return -EINVAL;
 553
 554         pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
 555                  __func__, mpp_data.entitled_mem, mpp_data.mem_weight);
 556
 557         pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
 558                  __func__, new_entitled, new_weight);
 559
 560         rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight);
 561         return rc;
 562 }
 563
 564 /*
 565  * Interface for changing system parameters (variable capacity weight
 566  * and entitled capacity).  Format of input is "param_name=value";
 567  * anything after value is ignored.  Valid parameters at this time are
 568  * "partition_entitled_capacity" and "capacity_weight".  We use
 569  * H_SET_PPP to alter parameters.
 570  *
 571  * This function should be invoked only on systems with
 572  * FW_FEATURE_SPLPAR.
 573  */
 574 static ssize_t lparcfg_write(struct file *file, const char __user * buf,
 575                              size_t count, loff_t * off)
 576 {
 577         int kbuf_sz = 64;
 578         char kbuf[kbuf_sz];
 579         char *tmp;
 580         u64 new_entitled, *new_entitled_ptr = &new_entitled;
 581         u8 new_weight, *new_weight_ptr = &new_weight;
 582         ssize_t retval;
 583
 584         if (!firmware_has_feature(FW_FEATURE_SPLPAR))
 585                 return -EINVAL;
 586
 587         if (count > kbuf_sz)
 588                 return -EINVAL;
 589
 590         if (copy_from_user(kbuf, buf, count))
 591                 return -EFAULT;
 592
 593         kbuf[count - 1] = '\0';
 594         tmp = strchr(kbuf, '=');
 595         if (!tmp)
 596                 return -EINVAL;
 597
 598         *tmp++ = '\0';
 599
 600         if (!strcmp(kbuf, "partition_entitled_capacity")) {
 601                 char *endp;
 602                 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
 603                 if (endp == tmp)
 604                         return -EINVAL;
 605
 606                 retval = update_ppp(new_entitled_ptr, NULL);
 607         } else if (!strcmp(kbuf, "capacity_weight")) {
 608                 char *endp;
 609                 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
 610                 if (endp == tmp)
 611                         return -EINVAL;
 612
 613                 retval = update_ppp(NULL, new_weight_ptr);
 614         } else if (!strcmp(kbuf, "entitled_memory")) {
 615                 char *endp;
 616                 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
 617                 if (endp == tmp)
 618                         return -EINVAL;
 619
 620                 retval = update_mpp(new_entitled_ptr, NULL);
 621         } else if (!strcmp(kbuf, "entitled_memory_weight")) {
 622                 char *endp;
 623                 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
 624                 if (endp == tmp)
 625                         return -EINVAL;
 626
 627                 retval = update_mpp(NULL, new_weight_ptr);
 628         } else
 629                 return -EINVAL;
 630
 631         if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
 632                 retval = count;
 633         } else if (retval == H_BUSY) {
 634                 retval = -EBUSY;
 635         } else if (retval == H_HARDWARE) {
 636                 retval = -EIO;
 637         } else if (retval == H_PARAMETER) {
 638                 retval = -EINVAL;
 639         }
 640
 641         return retval;
 642 }
 643
 644 static int lparcfg_data(struct seq_file *m, void *v)
 645 {
 646         struct device_node *rootdn;
 647         const char *model = "";
 648         const char *system_id = "";
 649         const char *tmp;
 650         const unsigned int *lp_index_ptr;
 651         unsigned int lp_index = 0;
 652
 653         seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS);
 654
 655         rootdn = of_find_node_by_path("/");
 656         if (rootdn) {
 657                 tmp = of_get_property(rootdn, "model", NULL);
 658                 if (tmp)
 659                         model = tmp;
 660                 tmp = of_get_property(rootdn, "system-id", NULL);
 661                 if (tmp)
 662                         system_id = tmp;
 663                 lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
 664                                         NULL);
 665                 if (lp_index_ptr)
 666                         lp_index = *lp_index_ptr;
 667                 of_node_put(rootdn);
 668         }
 669         seq_printf(m, "serial_number=%s\n", system_id);
 670         seq_printf(m, "system_type=%s\n", model);
 671         seq_printf(m, "partition_id=%d\n", (int)lp_index);
 672
 673         return pseries_lparcfg_data(m, v);
 674 }
 675
 676 static int lparcfg_open(struct inode *inode, struct file *file)
 677 {
 678         return single_open(file, lparcfg_data, NULL);
 679 }
 680
 681 static const struct file_operations lparcfg_fops = {
 682         .owner          = THIS_MODULE,
 683         .read           = seq_read,
 684         .write          = lparcfg_write,
 685         .open           = lparcfg_open,
 686         .release        = single_release,
 687         .llseek         = seq_lseek,
 688 };
 689
 690 static int __init lparcfg_init(void)
 691 {
 692         struct proc_dir_entry *ent;
 693         umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
 694
 695         /* Allow writing if we have FW_FEATURE_SPLPAR */
 696         if (firmware_has_feature(FW_FEATURE_SPLPAR))
 697                 mode |= S_IWUSR;
 698
 699         ent = proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_fops);
 700         if (!ent) {
 701                 printk(KERN_ERR "Failed to create powerpc/lparcfg\n");
 702                 return -EIO;
 703         }
 704
 705         proc_ppc64_lparcfg = ent;
 706         return 0;
 707 }
 708
 709 static void __exit lparcfg_cleanup(void)
 710 {
 711         if (proc_ppc64_lparcfg)
 712                 remove_proc_entry("lparcfg", proc_ppc64_lparcfg->parent);
 713 }
 714
 715 module_init(lparcfg_init);
 716 module_exit(lparcfg_cleanup);
 717 MODULE_DESCRIPTION("Interface for LPAR configuration data");
 718 MODULE_AUTHOR("Dave Engebretsen");
 719 MODULE_LICENSE("GPL");