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