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 <asm/uaccess.h>
  28 #include <asm/iseries/hv_lp_config.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
  38 #define MODULE_VERS "1.7"
  39 #define MODULE_NAME "lparcfg"
  40
  41 /* #define LPARCFG_DEBUG */
  42
  43 static struct proc_dir_entry *proc_ppc64_lparcfg;
  44 #define LPARCFG_BUFF_SIZE 4096
  45
  46 /*
  47  * Track sum of all purrs across all processors. This is used to further
  48  * calculate usage values by different applications
  49  */
  50 static unsigned long get_purr(void)
  51 {
  52         unsigned long sum_purr = 0;
  53         int cpu;
  54
  55         for_each_possible_cpu(cpu) {
  56                 if (firmware_has_feature(FW_FEATURE_ISERIES))
  57                         sum_purr += lppaca[cpu].emulated_time_base;
  58                 else {
  59                         struct cpu_usage *cu;
  60
  61                         cu = &per_cpu(cpu_usage_array, cpu);
  62                         sum_purr += cu->current_tb;
  63                 }
  64         }
  65         return sum_purr;
  66 }
  67
  68 #ifdef CONFIG_PPC_ISERIES
  69
  70 /*
  71  * Methods used to fetch LPAR data when running on an iSeries platform.
  72  */
  73 static int iseries_lparcfg_data(struct seq_file *m, void *v)
  74 {
  75         unsigned long pool_id;
  76         int shared, entitled_capacity, max_entitled_capacity;
  77         int processors, max_processors;
  78         unsigned long purr = get_purr();
  79
  80         shared = (int)(get_lppaca()->shared_proc);
  81
  82         seq_printf(m, "system_active_processors=%d\n",
  83                    (int)HvLpConfig_getSystemPhysicalProcessors());
  84
  85         seq_printf(m, "system_potential_processors=%d\n",
  86                    (int)HvLpConfig_getSystemPhysicalProcessors());
  87
  88         processors = (int)HvLpConfig_getPhysicalProcessors();
  89         seq_printf(m, "partition_active_processors=%d\n", processors);
  90
  91         max_processors = (int)HvLpConfig_getMaxPhysicalProcessors();
  92         seq_printf(m, "partition_potential_processors=%d\n", max_processors);
  93
  94         if (shared) {
  95                 entitled_capacity = HvLpConfig_getSharedProcUnits();
  96                 max_entitled_capacity = HvLpConfig_getMaxSharedProcUnits();
  97         } else {
  98                 entitled_capacity = processors * 100;
  99                 max_entitled_capacity = max_processors * 100;
 100         }
 101         seq_printf(m, "partition_entitled_capacity=%d\n", entitled_capacity);
 102
 103         seq_printf(m, "partition_max_entitled_capacity=%d\n",
 104                    max_entitled_capacity);
 105
 106         if (shared) {
 107                 pool_id = HvLpConfig_getSharedPoolIndex();
 108                 seq_printf(m, "pool=%d\n", (int)pool_id);
 109                 seq_printf(m, "pool_capacity=%d\n",
 110                            (int)(HvLpConfig_getNumProcsInSharedPool(pool_id) *
 111                                  100));
 112                 seq_printf(m, "purr=%ld\n", purr);
 113         }
 114
 115         seq_printf(m, "shared_processor_mode=%d\n", shared);
 116
 117         return 0;
 118 }
 119
 120 #else                           /* CONFIG_PPC_ISERIES */
 121
 122 static int iseries_lparcfg_data(struct seq_file *m, void *v)
 123 {
 124         return 0;
 125 }
 126
 127 #endif                          /* CONFIG_PPC_ISERIES */
 128
 129 #ifdef CONFIG_PPC_PSERIES
 130 /*
 131  * Methods used to fetch LPAR data when running on a pSeries platform.
 132  */
 133 static void log_plpar_hcall_return(unsigned long rc, char *tag)
 134 {
 135         switch(rc) {
 136         case 0:
 137                 return;
 138         case H_HARDWARE:
 139                 printk(KERN_INFO "plpar-hcall (%s) "
 140                                 "Hardware fault\n", tag);
 141                 return;
 142         case H_FUNCTION:
 143                 printk(KERN_INFO "plpar-hcall (%s) "
 144                                 "Function not allowed\n", tag);
 145                 return;
 146         case H_AUTHORITY:
 147                 printk(KERN_INFO "plpar-hcall (%s) "
 148                                 "Not authorized to this function\n", tag);
 149                 return;
 150         case H_PARAMETER:
 151                 printk(KERN_INFO "plpar-hcall (%s) "
 152                                 "Bad parameter(s)\n",tag);
 153                 return;
 154         default:
 155                 printk(KERN_INFO "plpar-hcall (%s) "
 156                                 "Unexpected rc(0x%lx)\n", tag, rc);
 157         }
 158 }
 159
 160 /*
 161  * H_GET_PPP hcall returns info in 4 parms.
 162  *  entitled_capacity,unallocated_capacity,
 163  *  aggregation, resource_capability).
 164  *
 165  *  R4 = Entitled Processor Capacity Percentage.
 166  *  R5 = Unallocated Processor Capacity Percentage.
 167  *  R6 (AABBCCDDEEFFGGHH).
 168  *      XXXX - reserved (0)
 169  *          XXXX - reserved (0)
 170  *              XXXX - Group Number
 171  *                  XXXX - Pool Number.
 172  *  R7 (IIJJKKLLMMNNOOPP).
 173  *      XX - reserved. (0)
 174  *        XX - bit 0-6 reserved (0).   bit 7 is Capped indicator.
 175  *          XX - variable processor Capacity Weight
 176  *            XX - Unallocated Variable Processor Capacity Weight.
 177  *              XXXX - Active processors in Physical Processor Pool.
 178  *                  XXXX  - Processors active on platform.
 179  */
 180 static unsigned int h_get_ppp(unsigned long *entitled,
 181                               unsigned long *unallocated,
 182                               unsigned long *aggregation,
 183                               unsigned long *resource)
 184 {
 185         unsigned long rc;
 186         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 187
 188         rc = plpar_hcall(H_GET_PPP, retbuf);
 189
 190         *entitled = retbuf[0];
 191         *unallocated = retbuf[1];
 192         *aggregation = retbuf[2];
 193         *resource = retbuf[3];
 194
 195         log_plpar_hcall_return(rc, "H_GET_PPP");
 196
 197         return rc;
 198 }
 199
 200 static void h_pic(unsigned long *pool_idle_time, unsigned long *num_procs)
 201 {
 202         unsigned long rc;
 203         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 204
 205         rc = plpar_hcall(H_PIC, retbuf);
 206
 207         *pool_idle_time = retbuf[0];
 208         *num_procs = retbuf[1];
 209
 210         if (rc != H_AUTHORITY)
 211                 log_plpar_hcall_return(rc, "H_PIC");
 212 }
 213
 214 #define SPLPAR_CHARACTERISTICS_TOKEN 20
 215 #define SPLPAR_MAXLENGTH 1026*(sizeof(char))
 216
 217 /*
 218  * parse_system_parameter_string()
 219  * Retrieve the potential_processors, max_entitled_capacity and friends
 220  * through the get-system-parameter rtas call.  Replace keyword strings as
 221  * necessary.
 222  */
 223 static void parse_system_parameter_string(struct seq_file *m)
 224 {
 225         int call_status;
 226
 227         unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
 228         if (!local_buffer) {
 229                 printk(KERN_ERR "%s %s kmalloc failure at line %d \n",
 230                        __FILE__, __FUNCTION__, __LINE__);
 231                 return;
 232         }
 233
 234         spin_lock(&rtas_data_buf_lock);
 235         memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
 236         call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
 237                                 NULL,
 238                                 SPLPAR_CHARACTERISTICS_TOKEN,
 239                                 __pa(rtas_data_buf),
 240                                 RTAS_DATA_BUF_SIZE);
 241         memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
 242         spin_unlock(&rtas_data_buf_lock);
 243
 244         if (call_status != 0) {
 245                 printk(KERN_INFO
 246                        "%s %s Error calling get-system-parameter (0x%x)\n",
 247                        __FILE__, __FUNCTION__, call_status);
 248         } else {
 249                 int splpar_strlen;
 250                 int idx, w_idx;
 251                 char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
 252                 if (!workbuffer) {
 253                         printk(KERN_ERR "%s %s kmalloc failure at line %d \n",
 254                                __FILE__, __FUNCTION__, __LINE__);
 255                         kfree(local_buffer);
 256                         return;
 257                 }
 258 #ifdef LPARCFG_DEBUG
 259                 printk(KERN_INFO "success calling get-system-parameter \n");
 260 #endif
 261                 splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
 262                 local_buffer += 2;      /* step over strlen value */
 263
 264                 w_idx = 0;
 265                 idx = 0;
 266                 while ((*local_buffer) && (idx < splpar_strlen)) {
 267                         workbuffer[w_idx++] = local_buffer[idx++];
 268                         if ((local_buffer[idx] == ',')
 269                             || (local_buffer[idx] == '\0')) {
 270                                 workbuffer[w_idx] = '\0';
 271                                 if (w_idx) {
 272                                         /* avoid the empty string */
 273                                         seq_printf(m, "%s\n", workbuffer);
 274                                 }
 275                                 memset(workbuffer, 0, SPLPAR_MAXLENGTH);
 276                                 idx++;  /* skip the comma */
 277                                 w_idx = 0;
 278                         } else if (local_buffer[idx] == '=') {
 279                                 /* code here to replace workbuffer contents
 280                                    with different keyword strings */
 281                                 if (0 == strcmp(workbuffer, "MaxEntCap")) {
 282                                         strcpy(workbuffer,
 283                                                "partition_max_entitled_capacity");
 284                                         w_idx = strlen(workbuffer);
 285                                 }
 286                                 if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
 287                                         strcpy(workbuffer,
 288                                                "system_potential_processors");
 289                                         w_idx = strlen(workbuffer);
 290                                 }
 291                         }
 292                 }
 293                 kfree(workbuffer);
 294                 local_buffer -= 2;      /* back up over strlen value */
 295         }
 296         kfree(local_buffer);
 297 }
 298
 299 /* Return the number of processors in the system.
 300  * This function reads through the device tree and counts
 301  * the virtual processors, this does not include threads.
 302  */
 303 static int lparcfg_count_active_processors(void)
 304 {
 305         struct device_node *cpus_dn = NULL;
 306         int count = 0;
 307
 308         while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) {
 309 #ifdef LPARCFG_DEBUG
 310                 printk(KERN_ERR "cpus_dn %p \n", cpus_dn);
 311 #endif
 312                 count++;
 313         }
 314         return count;
 315 }
 316
 317 static int pseries_lparcfg_data(struct seq_file *m, void *v)
 318 {
 319         int partition_potential_processors;
 320         int partition_active_processors;
 321         struct device_node *rtas_node;
 322         const int *lrdrp = NULL;
 323
 324         rtas_node = of_find_node_by_path("/rtas");
 325         if (rtas_node)
 326                 lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
 327
 328         if (lrdrp == NULL) {
 329                 partition_potential_processors = vdso_data->processorCount;
 330         } else {
 331                 partition_potential_processors = *(lrdrp + 4);
 332         }
 333         of_node_put(rtas_node);
 334
 335         partition_active_processors = lparcfg_count_active_processors();
 336
 337         if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
 338                 unsigned long h_entitled, h_unallocated;
 339                 unsigned long h_aggregation, h_resource;
 340                 unsigned long pool_idle_time, pool_procs;
 341                 unsigned long purr;
 342
 343                 h_get_ppp(&h_entitled, &h_unallocated, &h_aggregation,
 344                           &h_resource);
 345
 346                 seq_printf(m, "R4=0x%lx\n", h_entitled);
 347                 seq_printf(m, "R5=0x%lx\n", h_unallocated);
 348                 seq_printf(m, "R6=0x%lx\n", h_aggregation);
 349                 seq_printf(m, "R7=0x%lx\n", h_resource);
 350
 351                 purr = get_purr();
 352
 353                 /* this call handles the ibm,get-system-parameter contents */
 354                 parse_system_parameter_string(m);
 355
 356                 seq_printf(m, "partition_entitled_capacity=%ld\n", h_entitled);
 357
 358                 seq_printf(m, "group=%ld\n", (h_aggregation >> 2 * 8) & 0xffff);
 359
 360                 seq_printf(m, "system_active_processors=%ld\n",
 361                            (h_resource >> 0 * 8) & 0xffff);
 362
 363                 /* pool related entries are apropriate for shared configs */
 364                 if (lppaca[0].shared_proc) {
 365
 366                         h_pic(&pool_idle_time, &pool_procs);
 367
 368                         seq_printf(m, "pool=%ld\n",
 369                                    (h_aggregation >> 0 * 8) & 0xffff);
 370
 371                         /* report pool_capacity in percentage */
 372                         seq_printf(m, "pool_capacity=%ld\n",
 373                                    ((h_resource >> 2 * 8) & 0xffff) * 100);
 374
 375                         seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
 376
 377                         seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
 378                 }
 379
 380                 seq_printf(m, "unallocated_capacity_weight=%ld\n",
 381                            (h_resource >> 4 * 8) & 0xFF);
 382
 383                 seq_printf(m, "capacity_weight=%ld\n",
 384                            (h_resource >> 5 * 8) & 0xFF);
 385
 386                 seq_printf(m, "capped=%ld\n", (h_resource >> 6 * 8) & 0x01);
 387
 388                 seq_printf(m, "unallocated_capacity=%ld\n", h_unallocated);
 389
 390                 seq_printf(m, "purr=%ld\n", purr);
 391
 392         } else {                /* non SPLPAR case */
 393
 394                 seq_printf(m, "system_active_processors=%d\n",
 395                            partition_potential_processors);
 396
 397                 seq_printf(m, "system_potential_processors=%d\n",
 398                            partition_potential_processors);
 399
 400                 seq_printf(m, "partition_max_entitled_capacity=%d\n",
 401                            partition_potential_processors * 100);
 402
 403                 seq_printf(m, "partition_entitled_capacity=%d\n",
 404                            partition_active_processors * 100);
 405         }
 406
 407         seq_printf(m, "partition_active_processors=%d\n",
 408                    partition_active_processors);
 409
 410         seq_printf(m, "partition_potential_processors=%d\n",
 411                    partition_potential_processors);
 412
 413         seq_printf(m, "shared_processor_mode=%d\n", lppaca[0].shared_proc);
 414
 415         return 0;
 416 }
 417
 418 /*
 419  * Interface for changing system parameters (variable capacity weight
 420  * and entitled capacity).  Format of input is "param_name=value";
 421  * anything after value is ignored.  Valid parameters at this time are
 422  * "partition_entitled_capacity" and "capacity_weight".  We use
 423  * H_SET_PPP to alter parameters.
 424  *
 425  * This function should be invoked only on systems with
 426  * FW_FEATURE_SPLPAR.
 427  */
 428 static ssize_t lparcfg_write(struct file *file, const char __user * buf,
 429                              size_t count, loff_t * off)
 430 {
 431         char *kbuf;
 432         char *tmp;
 433         u64 new_entitled, *new_entitled_ptr = &new_entitled;
 434         u8 new_weight, *new_weight_ptr = &new_weight;
 435
 436         unsigned long current_entitled; /* parameters for h_get_ppp */
 437         unsigned long dummy;
 438         unsigned long resource;
 439         u8 current_weight;
 440
 441         ssize_t retval = -ENOMEM;
 442
 443         if (!firmware_has_feature(FW_FEATURE_SPLPAR) ||
 444                         firmware_has_feature(FW_FEATURE_ISERIES))
 445                 return -EINVAL;
 446
 447         kbuf = kmalloc(count, GFP_KERNEL);
 448         if (!kbuf)
 449                 goto out;
 450
 451         retval = -EFAULT;
 452         if (copy_from_user(kbuf, buf, count))
 453                 goto out;
 454
 455         retval = -EINVAL;
 456         kbuf[count - 1] = '\0';
 457         tmp = strchr(kbuf, '=');
 458         if (!tmp)
 459                 goto out;
 460
 461         *tmp++ = '\0';
 462
 463         if (!strcmp(kbuf, "partition_entitled_capacity")) {
 464                 char *endp;
 465                 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
 466                 if (endp == tmp)
 467                         goto out;
 468                 new_weight_ptr = &current_weight;
 469         } else if (!strcmp(kbuf, "capacity_weight")) {
 470                 char *endp;
 471                 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
 472                 if (endp == tmp)
 473                         goto out;
 474                 new_entitled_ptr = &current_entitled;
 475         } else
 476                 goto out;
 477
 478         /* Get our current parameters */
 479         retval = h_get_ppp(&current_entitled, &dummy, &dummy, &resource);
 480         if (retval) {
 481                 retval = -EIO;
 482                 goto out;
 483         }
 484
 485         current_weight = (resource >> 5 * 8) & 0xFF;
 486
 487         pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
 488                  __FUNCTION__, current_entitled, current_weight);
 489
 490         pr_debug("%s: new_entitled = %lu, new_weight = %u\n",
 491                  __FUNCTION__, *new_entitled_ptr, *new_weight_ptr);
 492
 493         retval = plpar_hcall_norets(H_SET_PPP, *new_entitled_ptr,
 494                                     *new_weight_ptr);
 495
 496         if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
 497                 retval = count;
 498         } else if (retval == H_BUSY) {
 499                 retval = -EBUSY;
 500         } else if (retval == H_HARDWARE) {
 501                 retval = -EIO;
 502         } else if (retval == H_PARAMETER) {
 503                 retval = -EINVAL;
 504         } else {
 505                 printk(KERN_WARNING "%s: received unknown hv return code %ld",
 506                        __FUNCTION__, retval);
 507                 retval = -EIO;
 508         }
 509
 510 out:
 511         kfree(kbuf);
 512         return retval;
 513 }
 514
 515 #else                           /* CONFIG_PPC_PSERIES */
 516
 517 static int pseries_lparcfg_data(struct seq_file *m, void *v)
 518 {
 519         return 0;
 520 }
 521
 522 static ssize_t lparcfg_write(struct file *file, const char __user * buf,
 523                              size_t count, loff_t * off)
 524 {
 525         return -EINVAL;
 526 }
 527
 528 #endif                          /* CONFIG_PPC_PSERIES */
 529
 530 static int lparcfg_data(struct seq_file *m, void *v)
 531 {
 532         struct device_node *rootdn;
 533         const char *model = "";
 534         const char *system_id = "";
 535         const char *tmp;
 536         const unsigned int *lp_index_ptr;
 537         unsigned int lp_index = 0;
 538
 539         seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS);
 540
 541         rootdn = of_find_node_by_path("/");
 542         if (rootdn) {
 543                 tmp = of_get_property(rootdn, "model", NULL);
 544                 if (tmp) {
 545                         model = tmp;
 546                         /* Skip "IBM," - see platforms/iseries/dt.c */
 547                         if (firmware_has_feature(FW_FEATURE_ISERIES))
 548                                 model += 4;
 549                 }
 550                 tmp = of_get_property(rootdn, "system-id", NULL);
 551                 if (tmp) {
 552                         system_id = tmp;
 553                         /* Skip "IBM," - see platforms/iseries/dt.c */
 554                         if (firmware_has_feature(FW_FEATURE_ISERIES))
 555                                 system_id += 4;
 556                 }
 557                 lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
 558                                         NULL);
 559                 if (lp_index_ptr)
 560                         lp_index = *lp_index_ptr;
 561                 of_node_put(rootdn);
 562         }
 563         seq_printf(m, "serial_number=%s\n", system_id);
 564         seq_printf(m, "system_type=%s\n", model);
 565         seq_printf(m, "partition_id=%d\n", (int)lp_index);
 566
 567         if (firmware_has_feature(FW_FEATURE_ISERIES))
 568                 return iseries_lparcfg_data(m, v);
 569         return pseries_lparcfg_data(m, v);
 570 }
 571
 572 static int lparcfg_open(struct inode *inode, struct file *file)
 573 {
 574         return single_open(file, lparcfg_data, NULL);
 575 }
 576
 577 const struct file_operations lparcfg_fops = {
 578         .owner          = THIS_MODULE,
 579         .read           = seq_read,
 580         .write          = lparcfg_write,
 581         .open           = lparcfg_open,
 582         .release        = single_release,
 583 };
 584
 585 int __init lparcfg_init(void)
 586 {
 587         struct proc_dir_entry *ent;
 588         mode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
 589
 590         /* Allow writing if we have FW_FEATURE_SPLPAR */
 591         if (firmware_has_feature(FW_FEATURE_SPLPAR) &&
 592                         !firmware_has_feature(FW_FEATURE_ISERIES))
 593                 mode |= S_IWUSR;
 594
 595         ent = create_proc_entry("ppc64/lparcfg", mode, NULL);
 596         if (ent) {
 597                 ent->proc_fops = &lparcfg_fops;
 598                 ent->data = kmalloc(LPARCFG_BUFF_SIZE, GFP_KERNEL);
 599                 if (!ent->data) {
 600                         printk(KERN_ERR
 601                                "Failed to allocate buffer for lparcfg\n");
 602                         remove_proc_entry("lparcfg", ent->parent);
 603                         return -ENOMEM;
 604                 }
 605         } else {
 606                 printk(KERN_ERR "Failed to create ppc64/lparcfg\n");
 607                 return -EIO;
 608         }
 609
 610         proc_ppc64_lparcfg = ent;
 611         return 0;
 612 }
 613
 614 void __exit lparcfg_cleanup(void)
 615 {
 616         if (proc_ppc64_lparcfg) {
 617                 kfree(proc_ppc64_lparcfg->data);
 618                 remove_proc_entry("lparcfg", proc_ppc64_lparcfg->parent);
 619         }
 620 }
 621
 622 module_init(lparcfg_init);
 623 module_exit(lparcfg_cleanup);
 624 MODULE_DESCRIPTION("Interface for LPAR configuration data");
 625 MODULE_AUTHOR("Dave Engebretsen");
 626 MODULE_LICENSE("GPL");