arch/ppc64/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/config.h>
  22 #include <linux/module.h>
  23 #include <linux/types.h>
  24 #include <linux/errno.h>
  25 #include <linux/proc_fs.h>
  26 #include <linux/init.h>
  27 #include <linux/seq_file.h>
  28 #include <asm/uaccess.h>
  29 #include <asm/iseries/hv_lp_config.h>
  30 #include <asm/lppaca.h>
  31 #include <asm/hvcall.h>
  32 #include <asm/firmware.h>
  33 #include <asm/rtas.h>
  34 #include <asm/system.h>
  35 #include <asm/time.h>
  36 #include <asm/iseries/it_exp_vpd_panel.h>
  37 #include <asm/prom.h>
  38 #include <asm/systemcfg.h>
  39
  40 #define MODULE_VERS "1.6"
  41 #define MODULE_NAME "lparcfg"
  42
  43 /* #define LPARCFG_DEBUG */
  44
  45 /* find a better place for this function... */
  46 void log_plpar_hcall_return(unsigned long rc, char *tag)
  47 {
  48         if (rc == 0)            /* success, return */
  49                 return;
  50 /* check for null tag ? */
  51         if (rc == H_Hardware)
  52                 printk(KERN_INFO
  53                        "plpar-hcall (%s) failed with hardware fault\n", tag);
  54         else if (rc == H_Function)
  55                 printk(KERN_INFO
  56                        "plpar-hcall (%s) failed; function not allowed\n", tag);
  57         else if (rc == H_Authority)
  58                 printk(KERN_INFO
  59                        "plpar-hcall (%s) failed; not authorized to this function\n",
  60                        tag);
  61         else if (rc == H_Parameter)
  62                 printk(KERN_INFO "plpar-hcall (%s) failed; Bad parameter(s)\n",
  63                        tag);
  64         else
  65                 printk(KERN_INFO
  66                        "plpar-hcall (%s) failed with unexpected rc(0x%lx)\n",
  67                        tag, rc);
  68
  69 }
  70
  71 static struct proc_dir_entry *proc_ppc64_lparcfg;
  72 #define LPARCFG_BUFF_SIZE 4096
  73
  74 #ifdef CONFIG_PPC_ISERIES
  75
  76 /*
  77  * For iSeries legacy systems, the PPA purr function is available from the
  78  * emulated_time_base field in the paca.
  79  */
  80 static unsigned long get_purr(void)
  81 {
  82         unsigned long sum_purr = 0;
  83         int cpu;
  84         struct paca_struct *lpaca;
  85
  86         for_each_cpu(cpu) {
  87                 lpaca = paca + cpu;
  88                 sum_purr += lpaca->lppaca.emulated_time_base;
  89
  90 #ifdef PURR_DEBUG
  91                 printk(KERN_INFO "get_purr for cpu (%d) has value (%ld) \n",
  92                         cpu, lpaca->lppaca.emulated_time_base);
  93 #endif
  94         }
  95         return sum_purr;
  96 }
  97
  98 #define lparcfg_write NULL
  99
 100 /*
 101  * Methods used to fetch LPAR data when running on an iSeries platform.
 102  */
 103 static int lparcfg_data(struct seq_file *m, void *v)
 104 {
 105         unsigned long pool_id, lp_index;
 106         int shared, entitled_capacity, max_entitled_capacity;
 107         int processors, max_processors;
 108         struct paca_struct *lpaca = get_paca();
 109         unsigned long purr = get_purr();
 110
 111         seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS);
 112
 113         shared = (int)(lpaca->lppaca_ptr->shared_proc);
 114         seq_printf(m, "serial_number=%c%c%c%c%c%c%c\n",
 115                    e2a(xItExtVpdPanel.mfgID[2]),
 116                    e2a(xItExtVpdPanel.mfgID[3]),
 117                    e2a(xItExtVpdPanel.systemSerial[1]),
 118                    e2a(xItExtVpdPanel.systemSerial[2]),
 119                    e2a(xItExtVpdPanel.systemSerial[3]),
 120                    e2a(xItExtVpdPanel.systemSerial[4]),
 121                    e2a(xItExtVpdPanel.systemSerial[5]));
 122
 123         seq_printf(m, "system_type=%c%c%c%c\n",
 124                    e2a(xItExtVpdPanel.machineType[0]),
 125                    e2a(xItExtVpdPanel.machineType[1]),
 126                    e2a(xItExtVpdPanel.machineType[2]),
 127                    e2a(xItExtVpdPanel.machineType[3]));
 128
 129         lp_index = HvLpConfig_getLpIndex();
 130         seq_printf(m, "partition_id=%d\n", (int)lp_index);
 131
 132         seq_printf(m, "system_active_processors=%d\n",
 133                    (int)HvLpConfig_getSystemPhysicalProcessors());
 134
 135         seq_printf(m, "system_potential_processors=%d\n",
 136                    (int)HvLpConfig_getSystemPhysicalProcessors());
 137
 138         processors = (int)HvLpConfig_getPhysicalProcessors();
 139         seq_printf(m, "partition_active_processors=%d\n", processors);
 140
 141         max_processors = (int)HvLpConfig_getMaxPhysicalProcessors();
 142         seq_printf(m, "partition_potential_processors=%d\n", max_processors);
 143
 144         if (shared) {
 145                 entitled_capacity = HvLpConfig_getSharedProcUnits();
 146                 max_entitled_capacity = HvLpConfig_getMaxSharedProcUnits();
 147         } else {
 148                 entitled_capacity = processors * 100;
 149                 max_entitled_capacity = max_processors * 100;
 150         }
 151         seq_printf(m, "partition_entitled_capacity=%d\n", entitled_capacity);
 152
 153         seq_printf(m, "partition_max_entitled_capacity=%d\n",
 154                    max_entitled_capacity);
 155
 156         if (shared) {
 157                 pool_id = HvLpConfig_getSharedPoolIndex();
 158                 seq_printf(m, "pool=%d\n", (int)pool_id);
 159                 seq_printf(m, "pool_capacity=%d\n",
 160                            (int)(HvLpConfig_getNumProcsInSharedPool(pool_id) *
 161                                  100));
 162                 seq_printf(m, "purr=%ld\n", purr);
 163         }
 164
 165         seq_printf(m, "shared_processor_mode=%d\n", shared);
 166
 167         return 0;
 168 }
 169 #endif                          /* CONFIG_PPC_ISERIES */
 170
 171 #ifdef CONFIG_PPC_PSERIES
 172 /*
 173  * Methods used to fetch LPAR data when running on a pSeries platform.
 174  */
 175
 176 /*
 177  * H_GET_PPP hcall returns info in 4 parms.
 178  *  entitled_capacity,unallocated_capacity,
 179  *  aggregation, resource_capability).
 180  *
 181  *  R4 = Entitled Processor Capacity Percentage.
 182  *  R5 = Unallocated Processor Capacity Percentage.
 183  *  R6 (AABBCCDDEEFFGGHH).
 184  *      XXXX - reserved (0)
 185  *          XXXX - reserved (0)
 186  *              XXXX - Group Number
 187  *                  XXXX - Pool Number.
 188  *  R7 (IIJJKKLLMMNNOOPP).
 189  *      XX - reserved. (0)
 190  *        XX - bit 0-6 reserved (0).   bit 7 is Capped indicator.
 191  *          XX - variable processor Capacity Weight
 192  *            XX - Unallocated Variable Processor Capacity Weight.
 193  *              XXXX - Active processors in Physical Processor Pool.
 194  *                  XXXX  - Processors active on platform.
 195  */
 196 static unsigned int h_get_ppp(unsigned long *entitled,
 197                               unsigned long *unallocated,
 198                               unsigned long *aggregation,
 199                               unsigned long *resource)
 200 {
 201         unsigned long rc;
 202         rc = plpar_hcall_4out(H_GET_PPP, 0, 0, 0, 0, entitled, unallocated,
 203                               aggregation, resource);
 204
 205         log_plpar_hcall_return(rc, "H_GET_PPP");
 206
 207         return rc;
 208 }
 209
 210 static void h_pic(unsigned long *pool_idle_time, unsigned long *num_procs)
 211 {
 212         unsigned long rc;
 213         unsigned long dummy;
 214         rc = plpar_hcall(H_PIC, 0, 0, 0, 0, pool_idle_time, num_procs, &dummy);
 215
 216         log_plpar_hcall_return(rc, "H_PIC");
 217 }
 218
 219 static unsigned long get_purr(void);
 220
 221 /* Track sum of all purrs across all processors. This is used to further */
 222 /* calculate usage values by different applications                       */
 223
 224 static unsigned long get_purr(void)
 225 {
 226         unsigned long sum_purr = 0;
 227         int cpu;
 228         struct cpu_usage *cu;
 229
 230         for_each_cpu(cpu) {
 231                 cu = &per_cpu(cpu_usage_array, cpu);
 232                 sum_purr += cu->current_tb;
 233         }
 234         return sum_purr;
 235 }
 236
 237 #define SPLPAR_CHARACTERISTICS_TOKEN 20
 238 #define SPLPAR_MAXLENGTH 1026*(sizeof(char))
 239
 240 /*
 241  * parse_system_parameter_string()
 242  * Retrieve the potential_processors, max_entitled_capacity and friends
 243  * through the get-system-parameter rtas call.  Replace keyword strings as
 244  * necessary.
 245  */
 246 static void parse_system_parameter_string(struct seq_file *m)
 247 {
 248         int call_status;
 249
 250         char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
 251         if (!local_buffer) {
 252                 printk(KERN_ERR "%s %s kmalloc failure at line %d \n",
 253                        __FILE__, __FUNCTION__, __LINE__);
 254                 return;
 255         }
 256
 257         spin_lock(&rtas_data_buf_lock);
 258         memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
 259         call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
 260                                 NULL,
 261                                 SPLPAR_CHARACTERISTICS_TOKEN,
 262                                 __pa(rtas_data_buf));
 263         memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
 264         spin_unlock(&rtas_data_buf_lock);
 265
 266         if (call_status != 0) {
 267                 printk(KERN_INFO
 268                        "%s %s Error calling get-system-parameter (0x%x)\n",
 269                        __FILE__, __FUNCTION__, call_status);
 270         } else {
 271                 int splpar_strlen;
 272                 int idx, w_idx;
 273                 char *workbuffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
 274                 if (!workbuffer) {
 275                         printk(KERN_ERR "%s %s kmalloc failure at line %d \n",
 276                                __FILE__, __FUNCTION__, __LINE__);
 277                         kfree(local_buffer);
 278                         return;
 279                 }
 280 #ifdef LPARCFG_DEBUG
 281                 printk(KERN_INFO "success calling get-system-parameter \n");
 282 #endif
 283                 splpar_strlen = local_buffer[0] * 16 + local_buffer[1];
 284                 local_buffer += 2;      /* step over strlen value */
 285
 286                 memset(workbuffer, 0, SPLPAR_MAXLENGTH);
 287                 w_idx = 0;
 288                 idx = 0;
 289                 while ((*local_buffer) && (idx < splpar_strlen)) {
 290                         workbuffer[w_idx++] = local_buffer[idx++];
 291                         if ((local_buffer[idx] == ',')
 292                             || (local_buffer[idx] == '\0')) {
 293                                 workbuffer[w_idx] = '\0';
 294                                 if (w_idx) {
 295                                         /* avoid the empty string */
 296                                         seq_printf(m, "%s\n", workbuffer);
 297                                 }
 298                                 memset(workbuffer, 0, SPLPAR_MAXLENGTH);
 299                                 idx++;  /* skip the comma */
 300                                 w_idx = 0;
 301                         } else if (local_buffer[idx] == '=') {
 302                                 /* code here to replace workbuffer contents
 303                                    with different keyword strings */
 304                                 if (0 == strcmp(workbuffer, "MaxEntCap")) {
 305                                         strcpy(workbuffer,
 306                                                "partition_max_entitled_capacity");
 307                                         w_idx = strlen(workbuffer);
 308                                 }
 309                                 if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
 310                                         strcpy(workbuffer,
 311                                                "system_potential_processors");
 312                                         w_idx = strlen(workbuffer);
 313                                 }
 314                         }
 315                 }
 316                 kfree(workbuffer);
 317                 local_buffer -= 2;      /* back up over strlen value */
 318         }
 319         kfree(local_buffer);
 320 }
 321
 322 static int lparcfg_count_active_processors(void);
 323
 324 /* Return the number of processors in the system.
 325  * This function reads through the device tree and counts
 326  * the virtual processors, this does not include threads.
 327  */
 328 static int lparcfg_count_active_processors(void)
 329 {
 330         struct device_node *cpus_dn = NULL;
 331         int count = 0;
 332
 333         while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) {
 334 #ifdef LPARCFG_DEBUG
 335                 printk(KERN_ERR "cpus_dn %p \n", cpus_dn);
 336 #endif
 337                 count++;
 338         }
 339         return count;
 340 }
 341
 342 static int lparcfg_data(struct seq_file *m, void *v)
 343 {
 344         int partition_potential_processors;
 345         int partition_active_processors;
 346         struct device_node *rootdn;
 347         const char *model = "";
 348         const char *system_id = "";
 349         unsigned int *lp_index_ptr, lp_index = 0;
 350         struct device_node *rtas_node;
 351         int *lrdrp;
 352
 353         rootdn = find_path_device("/");
 354         if (rootdn) {
 355                 model = get_property(rootdn, "model", NULL);
 356                 system_id = get_property(rootdn, "system-id", NULL);
 357                 lp_index_ptr = (unsigned int *)
 358                     get_property(rootdn, "ibm,partition-no", NULL);
 359                 if (lp_index_ptr)
 360                         lp_index = *lp_index_ptr;
 361         }
 362
 363         seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS);
 364
 365         seq_printf(m, "serial_number=%s\n", system_id);
 366
 367         seq_printf(m, "system_type=%s\n", model);
 368
 369         seq_printf(m, "partition_id=%d\n", (int)lp_index);
 370
 371         rtas_node = find_path_device("/rtas");
 372         lrdrp = (int *)get_property(rtas_node, "ibm,lrdr-capacity", NULL);
 373
 374         if (lrdrp == NULL) {
 375                 partition_potential_processors = _systemcfg->processorCount;
 376         } else {
 377                 partition_potential_processors = *(lrdrp + 4);
 378         }
 379
 380         partition_active_processors = lparcfg_count_active_processors();
 381
 382         if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
 383                 unsigned long h_entitled, h_unallocated;
 384                 unsigned long h_aggregation, h_resource;
 385                 unsigned long pool_idle_time, pool_procs;
 386                 unsigned long purr;
 387
 388                 h_get_ppp(&h_entitled, &h_unallocated, &h_aggregation,
 389                           &h_resource);
 390
 391                 seq_printf(m, "R4=0x%lx\n", h_entitled);
 392                 seq_printf(m, "R5=0x%lx\n", h_unallocated);
 393                 seq_printf(m, "R6=0x%lx\n", h_aggregation);
 394                 seq_printf(m, "R7=0x%lx\n", h_resource);
 395
 396                 purr = get_purr();
 397
 398                 /* this call handles the ibm,get-system-parameter contents */
 399                 parse_system_parameter_string(m);
 400
 401                 seq_printf(m, "partition_entitled_capacity=%ld\n", h_entitled);
 402
 403                 seq_printf(m, "group=%ld\n", (h_aggregation >> 2 * 8) & 0xffff);
 404
 405                 seq_printf(m, "system_active_processors=%ld\n",
 406                            (h_resource >> 0 * 8) & 0xffff);
 407
 408                 /* pool related entries are apropriate for shared configs */
 409                 if (paca[0].lppaca.shared_proc) {
 410
 411                         h_pic(&pool_idle_time, &pool_procs);
 412
 413                         seq_printf(m, "pool=%ld\n",
 414                                    (h_aggregation >> 0 * 8) & 0xffff);
 415
 416                         /* report pool_capacity in percentage */
 417                         seq_printf(m, "pool_capacity=%ld\n",
 418                                    ((h_resource >> 2 * 8) & 0xffff) * 100);
 419
 420                         seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
 421
 422                         seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
 423                 }
 424
 425                 seq_printf(m, "unallocated_capacity_weight=%ld\n",
 426                            (h_resource >> 4 * 8) & 0xFF);
 427
 428                 seq_printf(m, "capacity_weight=%ld\n",
 429                            (h_resource >> 5 * 8) & 0xFF);
 430
 431                 seq_printf(m, "capped=%ld\n", (h_resource >> 6 * 8) & 0x01);
 432
 433                 seq_printf(m, "unallocated_capacity=%ld\n", h_unallocated);
 434
 435                 seq_printf(m, "purr=%ld\n", purr);
 436
 437         } else {                /* non SPLPAR case */
 438
 439                 seq_printf(m, "system_active_processors=%d\n",
 440                            partition_potential_processors);
 441
 442                 seq_printf(m, "system_potential_processors=%d\n",
 443                            partition_potential_processors);
 444
 445                 seq_printf(m, "partition_max_entitled_capacity=%d\n",
 446                            partition_potential_processors * 100);
 447
 448                 seq_printf(m, "partition_entitled_capacity=%d\n",
 449                            partition_active_processors * 100);
 450         }
 451
 452         seq_printf(m, "partition_active_processors=%d\n",
 453                    partition_active_processors);
 454
 455         seq_printf(m, "partition_potential_processors=%d\n",
 456                    partition_potential_processors);
 457
 458         seq_printf(m, "shared_processor_mode=%d\n", paca[0].lppaca.shared_proc);
 459
 460         return 0;
 461 }
 462
 463 /*
 464  * Interface for changing system parameters (variable capacity weight
 465  * and entitled capacity).  Format of input is "param_name=value";
 466  * anything after value is ignored.  Valid parameters at this time are
 467  * "partition_entitled_capacity" and "capacity_weight".  We use
 468  * H_SET_PPP to alter parameters.
 469  *
 470  * This function should be invoked only on systems with
 471  * FW_FEATURE_SPLPAR.
 472  */
 473 static ssize_t lparcfg_write(struct file *file, const char __user * buf,
 474                              size_t count, loff_t * off)
 475 {
 476         char *kbuf;
 477         char *tmp;
 478         u64 new_entitled, *new_entitled_ptr = &new_entitled;
 479         u8 new_weight, *new_weight_ptr = &new_weight;
 480
 481         unsigned long current_entitled; /* parameters for h_get_ppp */
 482         unsigned long dummy;
 483         unsigned long resource;
 484         u8 current_weight;
 485
 486         ssize_t retval = -ENOMEM;
 487
 488         kbuf = kmalloc(count, GFP_KERNEL);
 489         if (!kbuf)
 490                 goto out;
 491
 492         retval = -EFAULT;
 493         if (copy_from_user(kbuf, buf, count))
 494                 goto out;
 495
 496         retval = -EINVAL;
 497         kbuf[count - 1] = '\0';
 498         tmp = strchr(kbuf, '=');
 499         if (!tmp)
 500                 goto out;
 501
 502         *tmp++ = '\0';
 503
 504         if (!strcmp(kbuf, "partition_entitled_capacity")) {
 505                 char *endp;
 506                 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
 507                 if (endp == tmp)
 508                         goto out;
 509                 new_weight_ptr = &current_weight;
 510         } else if (!strcmp(kbuf, "capacity_weight")) {
 511                 char *endp;
 512                 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
 513                 if (endp == tmp)
 514                         goto out;
 515                 new_entitled_ptr = &current_entitled;
 516         } else
 517                 goto out;
 518
 519         /* Get our current parameters */
 520         retval = h_get_ppp(&current_entitled, &dummy, &dummy, &resource);
 521         if (retval) {
 522                 retval = -EIO;
 523                 goto out;
 524         }
 525
 526         current_weight = (resource >> 5 * 8) & 0xFF;
 527
 528         pr_debug("%s: current_entitled = %lu, current_weight = %lu\n",
 529                  __FUNCTION__, current_entitled, current_weight);
 530
 531         pr_debug("%s: new_entitled = %lu, new_weight = %lu\n",
 532                  __FUNCTION__, *new_entitled_ptr, *new_weight_ptr);
 533
 534         retval = plpar_hcall_norets(H_SET_PPP, *new_entitled_ptr,
 535                                     *new_weight_ptr);
 536
 537         if (retval == H_Success || retval == H_Constrained) {
 538                 retval = count;
 539         } else if (retval == H_Busy) {
 540                 retval = -EBUSY;
 541         } else if (retval == H_Hardware) {
 542                 retval = -EIO;
 543         } else if (retval == H_Parameter) {
 544                 retval = -EINVAL;
 545         } else {
 546                 printk(KERN_WARNING "%s: received unknown hv return code %ld",
 547                        __FUNCTION__, retval);
 548                 retval = -EIO;
 549         }
 550
 551       out:
 552         kfree(kbuf);
 553         return retval;
 554 }
 555
 556 #endif                          /* CONFIG_PPC_PSERIES */
 557
 558 static int lparcfg_open(struct inode *inode, struct file *file)
 559 {
 560         return single_open(file, lparcfg_data, NULL);
 561 }
 562
 563 struct file_operations lparcfg_fops = {
 564       .owner    = THIS_MODULE,
 565       .read     = seq_read,
 566       .open     = lparcfg_open,
 567       .release  = single_release,
 568 };
 569
 570 int __init lparcfg_init(void)
 571 {
 572         struct proc_dir_entry *ent;
 573         mode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
 574
 575         /* Allow writing if we have FW_FEATURE_SPLPAR */
 576         if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
 577                 lparcfg_fops.write = lparcfg_write;
 578                 mode |= S_IWUSR;
 579         }
 580
 581         ent = create_proc_entry("ppc64/lparcfg", mode, NULL);
 582         if (ent) {
 583                 ent->proc_fops = &lparcfg_fops;
 584                 ent->data = kmalloc(LPARCFG_BUFF_SIZE, GFP_KERNEL);
 585                 if (!ent->data) {
 586                         printk(KERN_ERR
 587                                "Failed to allocate buffer for lparcfg\n");
 588                         remove_proc_entry("lparcfg", ent->parent);
 589                         return -ENOMEM;
 590                 }
 591         } else {
 592                 printk(KERN_ERR "Failed to create ppc64/lparcfg\n");
 593                 return -EIO;
 594         }
 595
 596         proc_ppc64_lparcfg = ent;
 597         return 0;
 598 }
 599
 600 void __exit lparcfg_cleanup(void)
 601 {
 602         if (proc_ppc64_lparcfg) {
 603                 kfree(proc_ppc64_lparcfg->data);
 604                 remove_proc_entry("lparcfg", proc_ppc64_lparcfg->parent);
 605         }
 606 }
 607
 608 module_init(lparcfg_init);
 609 module_exit(lparcfg_cleanup);
 610 MODULE_DESCRIPTION("Interface for LPAR configuration data");
 611 MODULE_AUTHOR("Dave Engebretsen");
 612 MODULE_LICENSE("GPL");