git.oblomov.eu Git - linux-2.6/blob - 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/HvLpConfig.h>
  30 #include <asm/lppaca.h>
  31 #include <asm/hvcall.h>
  32 #include <asm/cputable.h>
  33 #include <asm/rtas.h>
  34 #include <asm/system.h>
  35 #include <asm/time.h>
  36 #include <asm/iSeries/ItExtVpdPanel.h>
  37 #include <asm/prom.h>
  38
  39 #define MODULE_VERS "1.6"
  40 #define MODULE_NAME "lparcfg"
  41
  42 /* #define LPARCFG_DEBUG */
  43
  44 /* find a better place for this function... */
  45 void log_plpar_hcall_return(unsigned long rc, char *tag)
  46 {
  47         if (rc == 0)            /* success, return */
  48                 return;
  49 /* check for null tag ? */
  50         if (rc == H_Hardware)
  51                 printk(KERN_INFO
  52                        "plpar-hcall (%s) failed with hardware fault\n", tag);
  53         else if (rc == H_Function)
  54                 printk(KERN_INFO
  55                        "plpar-hcall (%s) failed; function not allowed\n", tag);
  56         else if (rc == H_Authority)
  57                 printk(KERN_INFO
  58                        "plpar-hcall (%s) failed; not authorized to this function\n",
  59                        tag);
  60         else if (rc == H_Parameter)
  61                 printk(KERN_INFO "plpar-hcall (%s) failed; Bad parameter(s)\n",
  62                        tag);
  63         else
  64                 printk(KERN_INFO
  65                        "plpar-hcall (%s) failed with unexpected rc(0x%lx)\n",
  66                        tag, rc);
  67
  68 }
  69
  70 static struct proc_dir_entry *proc_ppc64_lparcfg;
  71 #define LPARCFG_BUFF_SIZE 4096
  72
  73 #ifdef CONFIG_PPC_ISERIES
  74
  75 /*
  76  * For iSeries legacy systems, the PPA purr function is available from the
  77  * emulated_time_base field in the paca.
  78  */
  79 static unsigned long get_purr(void)
  80 {
  81         unsigned long sum_purr = 0;
  82         int cpu;
  83         struct paca_struct *lpaca;
  84
  85         for_each_cpu(cpu) {
  86                 lpaca = paca + cpu;
  87                 sum_purr += lpaca->lppaca.emulated_time_base;
  88
  89 #ifdef PURR_DEBUG
  90                 printk(KERN_INFO "get_purr for cpu (%d) has value (%ld) \n",
  91                         cpu, lpaca->lppaca.emulated_time_base);
  92 #endif
  93         }
  94         return sum_purr;
  95 }
  96
  97 #define lparcfg_write NULL
  98
  99 /*
 100  * Methods used to fetch LPAR data when running on an iSeries platform.
 101  */
 102 static int lparcfg_data(struct seq_file *m, void *v)
 103 {
 104         unsigned long pool_id, lp_index;
 105         int shared, entitled_capacity, max_entitled_capacity;
 106         int processors, max_processors;
 107         struct paca_struct *lpaca = get_paca();
 108         unsigned long purr = get_purr();
 109
 110         seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS);
 111
 112         shared = (int)(lpaca->lppaca_ptr->shared_proc);
 113         seq_printf(m, "serial_number=%c%c%c%c%c%c%c\n",
 114                    e2a(xItExtVpdPanel.mfgID[2]),
 115                    e2a(xItExtVpdPanel.mfgID[3]),
 116                    e2a(xItExtVpdPanel.systemSerial[1]),
 117                    e2a(xItExtVpdPanel.systemSerial[2]),
 118                    e2a(xItExtVpdPanel.systemSerial[3]),
 119                    e2a(xItExtVpdPanel.systemSerial[4]),
 120                    e2a(xItExtVpdPanel.systemSerial[5]));
 121
 122         seq_printf(m, "system_type=%c%c%c%c\n",
 123                    e2a(xItExtVpdPanel.machineType[0]),
 124                    e2a(xItExtVpdPanel.machineType[1]),
 125                    e2a(xItExtVpdPanel.machineType[2]),
 126                    e2a(xItExtVpdPanel.machineType[3]));
 127
 128         lp_index = HvLpConfig_getLpIndex();
 129         seq_printf(m, "partition_id=%d\n", (int)lp_index);
 130
 131         seq_printf(m, "system_active_processors=%d\n",
 132                    (int)HvLpConfig_getSystemPhysicalProcessors());
 133
 134         seq_printf(m, "system_potential_processors=%d\n",
 135                    (int)HvLpConfig_getSystemPhysicalProcessors());
 136
 137         processors = (int)HvLpConfig_getPhysicalProcessors();
 138         seq_printf(m, "partition_active_processors=%d\n", processors);
 139
 140         max_processors = (int)HvLpConfig_getMaxPhysicalProcessors();
 141         seq_printf(m, "partition_potential_processors=%d\n", max_processors);
 142
 143         if (shared) {
 144                 entitled_capacity = HvLpConfig_getSharedProcUnits();
 145                 max_entitled_capacity = HvLpConfig_getMaxSharedProcUnits();
 146         } else {
 147                 entitled_capacity = processors * 100;
 148                 max_entitled_capacity = max_processors * 100;
 149         }
 150         seq_printf(m, "partition_entitled_capacity=%d\n", entitled_capacity);
 151
 152         seq_printf(m, "partition_max_entitled_capacity=%d\n",
 153                    max_entitled_capacity);
 154
 155         if (shared) {
 156                 pool_id = HvLpConfig_getSharedPoolIndex();
 157                 seq_printf(m, "pool=%d\n", (int)pool_id);
 158                 seq_printf(m, "pool_capacity=%d\n",
 159                            (int)(HvLpConfig_getNumProcsInSharedPool(pool_id) *
 160                                  100));
 161                 seq_printf(m, "purr=%ld\n", purr);
 162         }
 163
 164         seq_printf(m, "shared_processor_mode=%d\n", shared);
 165
 166         return 0;
 167 }
 168 #endif                          /* CONFIG_PPC_ISERIES */
 169
 170 #ifdef CONFIG_PPC_PSERIES
 171 /*
 172  * Methods used to fetch LPAR data when running on a pSeries platform.
 173  */
 174
 175 /*
 176  * H_GET_PPP hcall returns info in 4 parms.
 177  *  entitled_capacity,unallocated_capacity,
 178  *  aggregation, resource_capability).
 179  *
 180  *  R4 = Entitled Processor Capacity Percentage.
 181  *  R5 = Unallocated Processor Capacity Percentage.
 182  *  R6 (AABBCCDDEEFFGGHH).
 183  *      XXXX - reserved (0)
 184  *          XXXX - reserved (0)
 185  *              XXXX - Group Number
 186  *                  XXXX - Pool Number.
 187  *  R7 (IIJJKKLLMMNNOOPP).
 188  *      XX - reserved. (0)
 189  *        XX - bit 0-6 reserved (0).   bit 7 is Capped indicator.
 190  *          XX - variable processor Capacity Weight
 191  *            XX - Unallocated Variable Processor Capacity Weight.
 192  *              XXXX - Active processors in Physical Processor Pool.
 193  *                  XXXX  - Processors active on platform.
 194  */
 195 static unsigned int h_get_ppp(unsigned long *entitled,
 196                               unsigned long *unallocated,
 197                               unsigned long *aggregation,
 198                               unsigned long *resource)
 199 {
 200         unsigned long rc;
 201         rc = plpar_hcall_4out(H_GET_PPP, 0, 0, 0, 0, entitled, unallocated,
 202                               aggregation, resource);
 203
 204         log_plpar_hcall_return(rc, "H_GET_PPP");
 205
 206         return rc;
 207 }
 208
 209 static void h_pic(unsigned long *pool_idle_time, unsigned long *num_procs)
 210 {
 211         unsigned long rc;
 212         unsigned long dummy;
 213         rc = plpar_hcall(H_PIC, 0, 0, 0, 0, pool_idle_time, num_procs, &dummy);
 214
 215         log_plpar_hcall_return(rc, "H_PIC");
 216 }
 217
 218 static unsigned long get_purr(void);
 219
 220 /* Track sum of all purrs across all processors. This is used to further */
 221 /* calculate usage values by different applications                       */
 222
 223 static unsigned long get_purr(void)
 224 {
 225         unsigned long sum_purr = 0;
 226         int cpu;
 227         struct cpu_usage *cu;
 228
 229         for_each_cpu(cpu) {
 230                 cu = &per_cpu(cpu_usage_array, cpu);
 231                 sum_purr += cu->current_tb;
 232         }
 233         return sum_purr;
 234 }
 235
 236 #define SPLPAR_CHARACTERISTICS_TOKEN 20
 237 #define SPLPAR_MAXLENGTH 1026*(sizeof(char))
 238
 239 /*
 240  * parse_system_parameter_string()
 241  * Retrieve the potential_processors, max_entitled_capacity and friends
 242  * through the get-system-parameter rtas call.  Replace keyword strings as
 243  * necessary.
 244  */
 245 static void parse_system_parameter_string(struct seq_file *m)
 246 {
 247         int call_status;
 248
 249         char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
 250         if (!local_buffer) {
 251                 printk(KERN_ERR "%s %s kmalloc failure at line %d \n",
 252                        __FILE__, __FUNCTION__, __LINE__);
 253                 return;
 254         }
 255
 256         spin_lock(&rtas_data_buf_lock);
 257         memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
 258         call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
 259                                 NULL,
 260                                 SPLPAR_CHARACTERISTICS_TOKEN,
 261                                 __pa(rtas_data_buf));
 262         memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
 263         spin_unlock(&rtas_data_buf_lock);
 264
 265         if (call_status != 0) {
 266                 printk(KERN_INFO
 267                        "%s %s Error calling get-system-parameter (0x%x)\n",
 268                        __FILE__, __FUNCTION__, call_status);
 269         } else {
 270                 int splpar_strlen;
 271                 int idx, w_idx;
 272                 char *workbuffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
 273                 if (!workbuffer) {
 274                         printk(KERN_ERR "%s %s kmalloc failure at line %d \n",
 275                                __FILE__, __FUNCTION__, __LINE__);
 276                         return;
 277                 }
 278 #ifdef LPARCFG_DEBUG
 279                 printk(KERN_INFO "success calling get-system-parameter \n");
 280 #endif
 281                 splpar_strlen = local_buffer[0] * 16 + local_buffer[1];
 282                 local_buffer += 2;      /* step over strlen value */
 283
 284                 memset(workbuffer, 0, SPLPAR_MAXLENGTH);
 285                 w_idx = 0;
 286                 idx = 0;
 287                 while ((*local_buffer) && (idx < splpar_strlen)) {
 288                         workbuffer[w_idx++] = local_buffer[idx++];
 289                         if ((local_buffer[idx] == ',')
 290                             || (local_buffer[idx] == '\0')) {
 291                                 workbuffer[w_idx] = '\0';
 292                                 if (w_idx) {
 293                                         /* avoid the empty string */
 294                                         seq_printf(m, "%s\n", workbuffer);
 295                                 }
 296                                 memset(workbuffer, 0, SPLPAR_MAXLENGTH);
 297                                 idx++;  /* skip the comma */
 298                                 w_idx = 0;
 299                         } else if (local_buffer[idx] == '=') {
 300                                 /* code here to replace workbuffer contents
 301                                    with different keyword strings */
 302                                 if (0 == strcmp(workbuffer, "MaxEntCap")) {
 303                                         strcpy(workbuffer,
 304                                                "partition_max_entitled_capacity");
 305                                         w_idx = strlen(workbuffer);
 306                                 }
 307                                 if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
 308                                         strcpy(workbuffer,
 309                                                "system_potential_processors");
 310                                         w_idx = strlen(workbuffer);
 311                                 }
 312                         }
 313                 }
 314                 kfree(workbuffer);
 315                 local_buffer -= 2;      /* back up over strlen value */
 316         }
 317         kfree(local_buffer);
 318 }
 319
 320 static int lparcfg_count_active_processors(void);
 321
 322 /* Return the number of processors in the system.
 323  * This function reads through the device tree and counts
 324  * the virtual processors, this does not include threads.
 325  */
 326 static int lparcfg_count_active_processors(void)
 327 {
 328         struct device_node *cpus_dn = NULL;
 329         int count = 0;
 330
 331         while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) {
 332 #ifdef LPARCFG_DEBUG
 333                 printk(KERN_ERR "cpus_dn %p \n", cpus_dn);
 334 #endif
 335                 count++;
 336         }
 337         return count;
 338 }
 339
 340 static int lparcfg_data(struct seq_file *m, void *v)
 341 {
 342         int partition_potential_processors;
 343         int partition_active_processors;
 344         struct device_node *rootdn;
 345         const char *model = "";
 346         const char *system_id = "";
 347         unsigned int *lp_index_ptr, lp_index = 0;
 348         struct device_node *rtas_node;
 349         int *lrdrp;
 350
 351         rootdn = find_path_device("/");
 352         if (rootdn) {
 353                 model = get_property(rootdn, "model", NULL);
 354                 system_id = get_property(rootdn, "system-id", NULL);
 355                 lp_index_ptr = (unsigned int *)
 356                     get_property(rootdn, "ibm,partition-no", NULL);
 357                 if (lp_index_ptr)
 358                         lp_index = *lp_index_ptr;
 359         }
 360
 361         seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS);
 362
 363         seq_printf(m, "serial_number=%s\n", system_id);
 364
 365         seq_printf(m, "system_type=%s\n", model);
 366
 367         seq_printf(m, "partition_id=%d\n", (int)lp_index);
 368
 369         rtas_node = find_path_device("/rtas");
 370         lrdrp = (int *)get_property(rtas_node, "ibm,lrdr-capacity", NULL);
 371
 372         if (lrdrp == NULL) {
 373                 partition_potential_processors = systemcfg->processorCount;
 374         } else {
 375                 partition_potential_processors = *(lrdrp + 4);
 376         }
 377
 378         partition_active_processors = lparcfg_count_active_processors();
 379
 380         if (cur_cpu_spec->firmware_features & FW_FEATURE_SPLPAR) {
 381                 unsigned long h_entitled, h_unallocated;
 382                 unsigned long h_aggregation, h_resource;
 383                 unsigned long pool_idle_time, pool_procs;
 384                 unsigned long purr;
 385
 386                 h_get_ppp(&h_entitled, &h_unallocated, &h_aggregation,
 387                           &h_resource);
 388
 389                 seq_printf(m, "R4=0x%lx\n", h_entitled);
 390                 seq_printf(m, "R5=0x%lx\n", h_unallocated);
 391                 seq_printf(m, "R6=0x%lx\n", h_aggregation);
 392                 seq_printf(m, "R7=0x%lx\n", h_resource);
 393
 394                 purr = get_purr();
 395
 396                 /* this call handles the ibm,get-system-parameter contents */
 397                 parse_system_parameter_string(m);
 398
 399                 seq_printf(m, "partition_entitled_capacity=%ld\n", h_entitled);
 400
 401                 seq_printf(m, "group=%ld\n", (h_aggregation >> 2 * 8) & 0xffff);
 402
 403                 seq_printf(m, "system_active_processors=%ld\n",
 404                            (h_resource >> 0 * 8) & 0xffff);
 405
 406                 /* pool related entries are apropriate for shared configs */
 407                 if (paca[0].lppaca.shared_proc) {
 408
 409                         h_pic(&pool_idle_time, &pool_procs);
 410
 411                         seq_printf(m, "pool=%ld\n",
 412                                    (h_aggregation >> 0 * 8) & 0xffff);
 413
 414                         /* report pool_capacity in percentage */
 415                         seq_printf(m, "pool_capacity=%ld\n",
 416                                    ((h_resource >> 2 * 8) & 0xffff) * 100);
 417
 418                         seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
 419
 420                         seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
 421                 }
 422
 423                 seq_printf(m, "unallocated_capacity_weight=%ld\n",
 424                            (h_resource >> 4 * 8) & 0xFF);
 425
 426                 seq_printf(m, "capacity_weight=%ld\n",
 427                            (h_resource >> 5 * 8) & 0xFF);
 428
 429                 seq_printf(m, "capped=%ld\n", (h_resource >> 6 * 8) & 0x01);
 430
 431                 seq_printf(m, "unallocated_capacity=%ld\n", h_unallocated);
 432
 433                 seq_printf(m, "purr=%ld\n", purr);
 434
 435         } else {                /* non SPLPAR case */
 436
 437                 seq_printf(m, "system_active_processors=%d\n",
 438                            partition_potential_processors);
 439
 440                 seq_printf(m, "system_potential_processors=%d\n",
 441                            partition_potential_processors);
 442
 443                 seq_printf(m, "partition_max_entitled_capacity=%d\n",
 444                            partition_potential_processors * 100);
 445
 446                 seq_printf(m, "partition_entitled_capacity=%d\n",
 447                            partition_active_processors * 100);
 448         }
 449
 450         seq_printf(m, "partition_active_processors=%d\n",
 451                    partition_active_processors);
 452
 453         seq_printf(m, "partition_potential_processors=%d\n",
 454                    partition_potential_processors);
 455
 456         seq_printf(m, "shared_processor_mode=%d\n", paca[0].lppaca.shared_proc);
 457
 458         return 0;
 459 }
 460
 461 /*
 462  * Interface for changing system parameters (variable capacity weight
 463  * and entitled capacity).  Format of input is "param_name=value";
 464  * anything after value is ignored.  Valid parameters at this time are
 465  * "partition_entitled_capacity" and "capacity_weight".  We use
 466  * H_SET_PPP to alter parameters.
 467  *
 468  * This function should be invoked only on systems with
 469  * FW_FEATURE_SPLPAR.
 470  */
 471 static ssize_t lparcfg_write(struct file *file, const char __user * buf,
 472                              size_t count, loff_t * off)
 473 {
 474         char *kbuf;
 475         char *tmp;
 476         u64 new_entitled, *new_entitled_ptr = &new_entitled;
 477         u8 new_weight, *new_weight_ptr = &new_weight;
 478
 479         unsigned long current_entitled; /* parameters for h_get_ppp */
 480         unsigned long dummy;
 481         unsigned long resource;
 482         u8 current_weight;
 483
 484         ssize_t retval = -ENOMEM;
 485
 486         kbuf = kmalloc(count, GFP_KERNEL);
 487         if (!kbuf)
 488                 goto out;
 489
 490         retval = -EFAULT;
 491         if (copy_from_user(kbuf, buf, count))
 492                 goto out;
 493
 494         retval = -EINVAL;
 495         kbuf[count - 1] = '\0';
 496         tmp = strchr(kbuf, '=');
 497         if (!tmp)
 498                 goto out;
 499
 500         *tmp++ = '\0';
 501
 502         if (!strcmp(kbuf, "partition_entitled_capacity")) {
 503                 char *endp;
 504                 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
 505                 if (endp == tmp)
 506                         goto out;
 507                 new_weight_ptr = &current_weight;
 508         } else if (!strcmp(kbuf, "capacity_weight")) {
 509                 char *endp;
 510                 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
 511                 if (endp == tmp)
 512                         goto out;
 513                 new_entitled_ptr = &current_entitled;
 514         } else
 515                 goto out;
 516
 517         /* Get our current parameters */
 518         retval = h_get_ppp(&current_entitled, &dummy, &dummy, &resource);
 519         if (retval) {
 520                 retval = -EIO;
 521                 goto out;
 522         }
 523
 524         current_weight = (resource >> 5 * 8) & 0xFF;
 525
 526         pr_debug("%s: current_entitled = %lu, current_weight = %lu\n",
 527                  __FUNCTION__, current_entitled, current_weight);
 528
 529         pr_debug("%s: new_entitled = %lu, new_weight = %lu\n",
 530                  __FUNCTION__, *new_entitled_ptr, *new_weight_ptr);
 531
 532         retval = plpar_hcall_norets(H_SET_PPP, *new_entitled_ptr,
 533                                     *new_weight_ptr);
 534
 535         if (retval == H_Success || retval == H_Constrained) {
 536                 retval = count;
 537         } else if (retval == H_Busy) {
 538                 retval = -EBUSY;
 539         } else if (retval == H_Hardware) {
 540                 retval = -EIO;
 541         } else if (retval == H_Parameter) {
 542                 retval = -EINVAL;
 543         } else {
 544                 printk(KERN_WARNING "%s: received unknown hv return code %ld",
 545                        __FUNCTION__, retval);
 546                 retval = -EIO;
 547         }
 548
 549       out:
 550         kfree(kbuf);
 551         return retval;
 552 }
 553
 554 #endif                          /* CONFIG_PPC_PSERIES */
 555
 556 static int lparcfg_open(struct inode *inode, struct file *file)
 557 {
 558         return single_open(file, lparcfg_data, NULL);
 559 }
 560
 561 struct file_operations lparcfg_fops = {
 562       .owner    = THIS_MODULE,
 563       .read     = seq_read,
 564       .open     = lparcfg_open,
 565       .release  = single_release,
 566 };
 567
 568 int __init lparcfg_init(void)
 569 {
 570         struct proc_dir_entry *ent;
 571         mode_t mode = S_IRUSR;
 572
 573         /* Allow writing if we have FW_FEATURE_SPLPAR */
 574         if (cur_cpu_spec->firmware_features & FW_FEATURE_SPLPAR) {
 575                 lparcfg_fops.write = lparcfg_write;
 576                 mode |= S_IWUSR;
 577         }
 578
 579         ent = create_proc_entry("ppc64/lparcfg", mode, NULL);
 580         if (ent) {
 581                 ent->proc_fops = &lparcfg_fops;
 582                 ent->data = kmalloc(LPARCFG_BUFF_SIZE, GFP_KERNEL);
 583                 if (!ent->data) {
 584                         printk(KERN_ERR
 585                                "Failed to allocate buffer for lparcfg\n");
 586                         remove_proc_entry("lparcfg", ent->parent);
 587                         return -ENOMEM;
 588                 }
 589         } else {
 590                 printk(KERN_ERR "Failed to create ppc64/lparcfg\n");
 591                 return -EIO;
 592         }
 593
 594         proc_ppc64_lparcfg = ent;
 595         return 0;
 596 }
 597
 598 void __exit lparcfg_cleanup(void)
 599 {
 600         if (proc_ppc64_lparcfg) {
 601                 if (proc_ppc64_lparcfg->data) {
 602                         kfree(proc_ppc64_lparcfg->data);
 603                 }
 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");