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Linux/arch/powerpc/platforms/pseries/lparcfg.c

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  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 <linux/uaccess.h>
 29 #include <linux/hugetlb.h>
 30 #include <asm/lppaca.h>
 31 #include <asm/hvcall.h>
 32 #include <asm/firmware.h>
 33 #include <asm/rtas.h>
 34 #include <asm/time.h>
 35 #include <asm/prom.h>
 36 #include <asm/vdso_datapage.h>
 37 #include <asm/vio.h>
 38 #include <asm/mmu.h>
 39 #include <asm/machdep.h>
 40 #include <asm/drmem.h>
 41 
 42 #include "pseries.h"
 43 
 44 /*
 45  * This isn't a module but we expose that to userspace
 46  * via /proc so leave the definitions here
 47  */
 48 #define MODULE_VERS "1.9"
 49 #define MODULE_NAME "lparcfg"
 50 
 51 /* #define LPARCFG_DEBUG */
 52 
 53 /*
 54  * Track sum of all purrs across all processors. This is used to further
 55  * calculate usage values by different applications
 56  */
 57 static void cpu_get_purr(void *arg)
 58 {
 59         atomic64_t *sum = arg;
 60 
 61         atomic64_add(mfspr(SPRN_PURR), sum);
 62 }
 63 
 64 static unsigned long get_purr(void)
 65 {
 66         atomic64_t purr = ATOMIC64_INIT(0);
 67 
 68         on_each_cpu(cpu_get_purr, &purr, 1);
 69 
 70         return atomic64_read(&purr);
 71 }
 72 
 73 /*
 74  * Methods used to fetch LPAR data when running on a pSeries platform.
 75  */
 76 
 77 struct hvcall_ppp_data {
 78         u64     entitlement;
 79         u64     unallocated_entitlement;
 80         u16     group_num;
 81         u16     pool_num;
 82         u8      capped;
 83         u8      weight;
 84         u8      unallocated_weight;
 85         u16     active_procs_in_pool;
 86         u16     active_system_procs;
 87         u16     phys_platform_procs;
 88         u32     max_proc_cap_avail;
 89         u32     entitled_proc_cap_avail;
 90 };
 91 
 92 /*
 93  * H_GET_PPP hcall returns info in 4 parms.
 94  *  entitled_capacity,unallocated_capacity,
 95  *  aggregation, resource_capability).
 96  *
 97  *  R4 = Entitled Processor Capacity Percentage.
 98  *  R5 = Unallocated Processor Capacity Percentage.
 99  *  R6 (AABBCCDDEEFFGGHH).
100  *      XXXX - reserved (0)
101  *          XXXX - reserved (0)
102  *              XXXX - Group Number
103  *                  XXXX - Pool Number.
104  *  R7 (IIJJKKLLMMNNOOPP).
105  *      XX - reserved. (0)
106  *        XX - bit 0-6 reserved (0).   bit 7 is Capped indicator.
107  *          XX - variable processor Capacity Weight
108  *            XX - Unallocated Variable Processor Capacity Weight.
109  *              XXXX - Active processors in Physical Processor Pool.
110  *                  XXXX  - Processors active on platform.
111  *  R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1
112  *      XXXX - Physical platform procs allocated to virtualization.
113  *          XXXXXX - Max procs capacity % available to the partitions pool.
114  *                XXXXXX - Entitled procs capacity % available to the
115  *                         partitions pool.
116  */
117 static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
118 {
119         unsigned long rc;
120         unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
121 
122         rc = plpar_hcall9(H_GET_PPP, retbuf);
123 
124         ppp_data->entitlement = retbuf[0];
125         ppp_data->unallocated_entitlement = retbuf[1];
126 
127         ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
128         ppp_data->pool_num = retbuf[2] & 0xffff;
129 
130         ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01;
131         ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff;
132         ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff;
133         ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff;
134         ppp_data->active_system_procs = retbuf[3] & 0xffff;
135 
136         ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8;
137         ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff;
138         ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff;
139 
140         return rc;
141 }
142 
143 static unsigned h_pic(unsigned long *pool_idle_time,
144                       unsigned long *num_procs)
145 {
146         unsigned long rc;
147         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
148 
149         rc = plpar_hcall(H_PIC, retbuf);
150 
151         *pool_idle_time = retbuf[0];
152         *num_procs = retbuf[1];
153 
154         return rc;
155 }
156 
157 /*
158  * parse_ppp_data
159  * Parse out the data returned from h_get_ppp and h_pic
160  */
161 static void parse_ppp_data(struct seq_file *m)
162 {
163         struct hvcall_ppp_data ppp_data;
164         struct device_node *root;
165         const __be32 *perf_level;
166         int rc;
167 
168         rc = h_get_ppp(&ppp_data);
169         if (rc)
170                 return;
171 
172         seq_printf(m, "partition_entitled_capacity=%lld\n",
173                    ppp_data.entitlement);
174         seq_printf(m, "group=%d\n", ppp_data.group_num);
175         seq_printf(m, "system_active_processors=%d\n",
176                    ppp_data.active_system_procs);
177 
178         /* pool related entries are appropriate for shared configs */
179         if (lppaca_shared_proc(get_lppaca())) {
180                 unsigned long pool_idle_time, pool_procs;
181 
182                 seq_printf(m, "pool=%d\n", ppp_data.pool_num);
183 
184                 /* report pool_capacity in percentage */
185                 seq_printf(m, "pool_capacity=%d\n",
186                            ppp_data.active_procs_in_pool * 100);
187 
188                 h_pic(&pool_idle_time, &pool_procs);
189                 seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
190                 seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
191         }
192 
193         seq_printf(m, "unallocated_capacity_weight=%d\n",
194                    ppp_data.unallocated_weight);
195         seq_printf(m, "capacity_weight=%d\n", ppp_data.weight);
196         seq_printf(m, "capped=%d\n", ppp_data.capped);
197         seq_printf(m, "unallocated_capacity=%lld\n",
198                    ppp_data.unallocated_entitlement);
199 
200         /* The last bits of information returned from h_get_ppp are only
201          * valid if the ibm,partition-performance-parameters-level
202          * property is >= 1.
203          */
204         root = of_find_node_by_path("/");
205         if (root) {
206                 perf_level = of_get_property(root,
207                                 "ibm,partition-performance-parameters-level",
208                                              NULL);
209                 if (perf_level && (be32_to_cpup(perf_level) >= 1)) {
210                         seq_printf(m,
211                             "physical_procs_allocated_to_virtualization=%d\n",
212                                    ppp_data.phys_platform_procs);
213                         seq_printf(m, "max_proc_capacity_available=%d\n",
214                                    ppp_data.max_proc_cap_avail);
215                         seq_printf(m, "entitled_proc_capacity_available=%d\n",
216                                    ppp_data.entitled_proc_cap_avail);
217                 }
218 
219                 of_node_put(root);
220         }
221 }
222 
223 /**
224  * parse_mpp_data
225  * Parse out data returned from h_get_mpp
226  */
227 static void parse_mpp_data(struct seq_file *m)
228 {
229         struct hvcall_mpp_data mpp_data;
230         int rc;
231 
232         rc = h_get_mpp(&mpp_data);
233         if (rc)
234                 return;
235 
236         seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem);
237 
238         if (mpp_data.mapped_mem != -1)
239                 seq_printf(m, "mapped_entitled_memory=%ld\n",
240                            mpp_data.mapped_mem);
241 
242         seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num);
243         seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num);
244 
245         seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight);
246         seq_printf(m, "unallocated_entitled_memory_weight=%d\n",
247                    mpp_data.unallocated_mem_weight);
248         seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n",
249                    mpp_data.unallocated_entitlement);
250 
251         if (mpp_data.pool_size != -1)
252                 seq_printf(m, "entitled_memory_pool_size=%ld bytes\n",
253                            mpp_data.pool_size);
254 
255         seq_printf(m, "entitled_memory_loan_request=%ld\n",
256                    mpp_data.loan_request);
257 
258         seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem);
259 }
260 
261 /**
262  * parse_mpp_x_data
263  * Parse out data returned from h_get_mpp_x
264  */
265 static void parse_mpp_x_data(struct seq_file *m)
266 {
267         struct hvcall_mpp_x_data mpp_x_data;
268 
269         if (!firmware_has_feature(FW_FEATURE_XCMO))
270                 return;
271         if (h_get_mpp_x(&mpp_x_data))
272                 return;
273 
274         seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes);
275 
276         if (mpp_x_data.pool_coalesced_bytes)
277                 seq_printf(m, "pool_coalesced_bytes=%ld\n",
278                            mpp_x_data.pool_coalesced_bytes);
279         if (mpp_x_data.pool_purr_cycles)
280                 seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles);
281         if (mpp_x_data.pool_spurr_cycles)
282                 seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles);
283 }
284 
285 #define SPLPAR_CHARACTERISTICS_TOKEN 20
286 #define SPLPAR_MAXLENGTH 1026*(sizeof(char))
287 
288 /*
289  * parse_system_parameter_string()
290  * Retrieve the potential_processors, max_entitled_capacity and friends
291  * through the get-system-parameter rtas call.  Replace keyword strings as
292  * necessary.
293  */
294 static void parse_system_parameter_string(struct seq_file *m)
295 {
296         int call_status;
297 
298         unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
299         if (!local_buffer) {
300                 printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
301                        __FILE__, __func__, __LINE__);
302                 return;
303         }
304 
305         spin_lock(&rtas_data_buf_lock);
306         memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
307         call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
308                                 NULL,
309                                 SPLPAR_CHARACTERISTICS_TOKEN,
310                                 __pa(rtas_data_buf),
311                                 RTAS_DATA_BUF_SIZE);
312         memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
313         local_buffer[SPLPAR_MAXLENGTH - 1] = '\0';
314         spin_unlock(&rtas_data_buf_lock);
315 
316         if (call_status != 0) {
317                 printk(KERN_INFO
318                        "%s %s Error calling get-system-parameter (0x%x)\n",
319                        __FILE__, __func__, call_status);
320         } else {
321                 int splpar_strlen;
322                 int idx, w_idx;
323                 char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
324                 if (!workbuffer) {
325                         printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
326                                __FILE__, __func__, __LINE__);
327                         kfree(local_buffer);
328                         return;
329                 }
330 #ifdef LPARCFG_DEBUG
331                 printk(KERN_INFO "success calling get-system-parameter\n");
332 #endif
333                 splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
334                 local_buffer += 2;      /* step over strlen value */
335 
336                 w_idx = 0;
337                 idx = 0;
338                 while ((*local_buffer) && (idx < splpar_strlen)) {
339                         workbuffer[w_idx++] = local_buffer[idx++];
340                         if ((local_buffer[idx] == ',')
341                             || (local_buffer[idx] == '\0')) {
342                                 workbuffer[w_idx] = '\0';
343                                 if (w_idx) {
344                                         /* avoid the empty string */
345                                         seq_printf(m, "%s\n", workbuffer);
346                                 }
347                                 memset(workbuffer, 0, SPLPAR_MAXLENGTH);
348                                 idx++;  /* skip the comma */
349                                 w_idx = 0;
350                         } else if (local_buffer[idx] == '=') {
351                                 /* code here to replace workbuffer contents
352                                    with different keyword strings */
353                                 if (0 == strcmp(workbuffer, "MaxEntCap")) {
354                                         strcpy(workbuffer,
355                                                "partition_max_entitled_capacity");
356                                         w_idx = strlen(workbuffer);
357                                 }
358                                 if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
359                                         strcpy(workbuffer,
360                                                "system_potential_processors");
361                                         w_idx = strlen(workbuffer);
362                                 }
363                         }
364                 }
365                 kfree(workbuffer);
366                 local_buffer -= 2;      /* back up over strlen value */
367         }
368         kfree(local_buffer);
369 }
370 
371 /* Return the number of processors in the system.
372  * This function reads through the device tree and counts
373  * the virtual processors, this does not include threads.
374  */
375 static int lparcfg_count_active_processors(void)
376 {
377         struct device_node *cpus_dn;
378         int count = 0;
379 
380         for_each_node_by_type(cpus_dn, "cpu") {
381 #ifdef LPARCFG_DEBUG
382                 printk(KERN_ERR "cpus_dn %p\n", cpus_dn);
383 #endif
384                 count++;
385         }
386         return count;
387 }
388 
389 static void pseries_cmo_data(struct seq_file *m)
390 {
391         int cpu;
392         unsigned long cmo_faults = 0;
393         unsigned long cmo_fault_time = 0;
394 
395         seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO));
396 
397         if (!firmware_has_feature(FW_FEATURE_CMO))
398                 return;
399 
400         for_each_possible_cpu(cpu) {
401                 cmo_faults += be64_to_cpu(lppaca_of(cpu).cmo_faults);
402                 cmo_fault_time += be64_to_cpu(lppaca_of(cpu).cmo_fault_time);
403         }
404 
405         seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
406         seq_printf(m, "cmo_fault_time_usec=%lu\n",
407                    cmo_fault_time / tb_ticks_per_usec);
408         seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp());
409         seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp());
410         seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size());
411 }
412 
413 static void splpar_dispatch_data(struct seq_file *m)
414 {
415         int cpu;
416         unsigned long dispatches = 0;
417         unsigned long dispatch_dispersions = 0;
418 
419         for_each_possible_cpu(cpu) {
420                 dispatches += be32_to_cpu(lppaca_of(cpu).yield_count);
421                 dispatch_dispersions +=
422                         be32_to_cpu(lppaca_of(cpu).dispersion_count);
423         }
424 
425         seq_printf(m, "dispatches=%lu\n", dispatches);
426         seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions);
427 }
428 
429 static void parse_em_data(struct seq_file *m)
430 {
431         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
432 
433         if (firmware_has_feature(FW_FEATURE_LPAR) &&
434             plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS)
435                 seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]);
436 }
437 
438 static void maxmem_data(struct seq_file *m)
439 {
440         unsigned long maxmem = 0;
441 
442         maxmem += drmem_info->n_lmbs * drmem_info->lmb_size;
443         maxmem += hugetlb_total_pages() * PAGE_SIZE;
444 
445         seq_printf(m, "MaxMem=%ld\n", maxmem);
446 }
447 
448 static int pseries_lparcfg_data(struct seq_file *m, void *v)
449 {
450         int partition_potential_processors;
451         int partition_active_processors;
452         struct device_node *rtas_node;
453         const __be32 *lrdrp = NULL;
454 
455         rtas_node = of_find_node_by_path("/rtas");
456         if (rtas_node)
457                 lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
458 
459         if (lrdrp == NULL) {
460                 partition_potential_processors = vdso_data->processorCount;
461         } else {
462                 partition_potential_processors = be32_to_cpup(lrdrp + 4);
463         }
464         of_node_put(rtas_node);
465 
466         partition_active_processors = lparcfg_count_active_processors();
467 
468         if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
469                 /* this call handles the ibm,get-system-parameter contents */
470                 parse_system_parameter_string(m);
471                 parse_ppp_data(m);
472                 parse_mpp_data(m);
473                 parse_mpp_x_data(m);
474                 pseries_cmo_data(m);
475                 splpar_dispatch_data(m);
476 
477                 seq_printf(m, "purr=%ld\n", get_purr());
478         } else {                /* non SPLPAR case */
479 
480                 seq_printf(m, "system_active_processors=%d\n",
481                            partition_potential_processors);
482 
483                 seq_printf(m, "system_potential_processors=%d\n",
484                            partition_potential_processors);
485 
486                 seq_printf(m, "partition_max_entitled_capacity=%d\n",
487                            partition_potential_processors * 100);
488 
489                 seq_printf(m, "partition_entitled_capacity=%d\n",
490                            partition_active_processors * 100);
491         }
492 
493         seq_printf(m, "partition_active_processors=%d\n",
494                    partition_active_processors);
495 
496         seq_printf(m, "partition_potential_processors=%d\n",
497                    partition_potential_processors);
498 
499         seq_printf(m, "shared_processor_mode=%d\n",
500                    lppaca_shared_proc(get_lppaca()));
501 
502 #ifdef CONFIG_PPC_BOOK3S_64
503         seq_printf(m, "slb_size=%d\n", mmu_slb_size);
504 #endif
505         parse_em_data(m);
506         maxmem_data(m);
507 
508         return 0;
509 }
510 
511 static ssize_t update_ppp(u64 *entitlement, u8 *weight)
512 {
513         struct hvcall_ppp_data ppp_data;
514         u8 new_weight;
515         u64 new_entitled;
516         ssize_t retval;
517 
518         /* Get our current parameters */
519         retval = h_get_ppp(&ppp_data);
520         if (retval)
521                 return retval;
522 
523         if (entitlement) {
524                 new_weight = ppp_data.weight;
525                 new_entitled = *entitlement;
526         } else if (weight) {
527                 new_weight = *weight;
528                 new_entitled = ppp_data.entitlement;
529         } else
530                 return -EINVAL;
531 
532         pr_debug("%s: current_entitled = %llu, current_weight = %u\n",
533                  __func__, ppp_data.entitlement, ppp_data.weight);
534 
535         pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
536                  __func__, new_entitled, new_weight);
537 
538         retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight);
539         return retval;
540 }
541 
542 /**
543  * update_mpp
544  *
545  * Update the memory entitlement and weight for the partition.  Caller must
546  * specify either a new entitlement or weight, not both, to be updated
547  * since the h_set_mpp call takes both entitlement and weight as parameters.
548  */
549 static ssize_t update_mpp(u64 *entitlement, u8 *weight)
550 {
551         struct hvcall_mpp_data mpp_data;
552         u64 new_entitled;
553         u8 new_weight;
554         ssize_t rc;
555 
556         if (entitlement) {
557                 /* Check with vio to ensure the new memory entitlement
558                  * can be handled.
559                  */
560                 rc = vio_cmo_entitlement_update(*entitlement);
561                 if (rc)
562                         return rc;
563         }
564 
565         rc = h_get_mpp(&mpp_data);
566         if (rc)
567                 return rc;
568 
569         if (entitlement) {
570                 new_weight = mpp_data.mem_weight;
571                 new_entitled = *entitlement;
572         } else if (weight) {
573                 new_weight = *weight;
574                 new_entitled = mpp_data.entitled_mem;
575         } else
576                 return -EINVAL;
577 
578         pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
579                  __func__, mpp_data.entitled_mem, mpp_data.mem_weight);
580 
581         pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
582                  __func__, new_entitled, new_weight);
583 
584         rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight);
585         return rc;
586 }
587 
588 /*
589  * Interface for changing system parameters (variable capacity weight
590  * and entitled capacity).  Format of input is "param_name=value";
591  * anything after value is ignored.  Valid parameters at this time are
592  * "partition_entitled_capacity" and "capacity_weight".  We use
593  * H_SET_PPP to alter parameters.
594  *
595  * This function should be invoked only on systems with
596  * FW_FEATURE_SPLPAR.
597  */
598 static ssize_t lparcfg_write(struct file *file, const char __user * buf,
599                              size_t count, loff_t * off)
600 {
601         char kbuf[64];
602         char *tmp;
603         u64 new_entitled, *new_entitled_ptr = &new_entitled;
604         u8 new_weight, *new_weight_ptr = &new_weight;
605         ssize_t retval;
606 
607         if (!firmware_has_feature(FW_FEATURE_SPLPAR))
608                 return -EINVAL;
609 
610         if (count > sizeof(kbuf))
611                 return -EINVAL;
612 
613         if (copy_from_user(kbuf, buf, count))
614                 return -EFAULT;
615 
616         kbuf[count - 1] = '\0';
617         tmp = strchr(kbuf, '=');
618         if (!tmp)
619                 return -EINVAL;
620 
621         *tmp++ = '\0';
622 
623         if (!strcmp(kbuf, "partition_entitled_capacity")) {
624                 char *endp;
625                 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
626                 if (endp == tmp)
627                         return -EINVAL;
628 
629                 retval = update_ppp(new_entitled_ptr, NULL);
630         } else if (!strcmp(kbuf, "capacity_weight")) {
631                 char *endp;
632                 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
633                 if (endp == tmp)
634                         return -EINVAL;
635 
636                 retval = update_ppp(NULL, new_weight_ptr);
637         } else if (!strcmp(kbuf, "entitled_memory")) {
638                 char *endp;
639                 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
640                 if (endp == tmp)
641                         return -EINVAL;
642 
643                 retval = update_mpp(new_entitled_ptr, NULL);
644         } else if (!strcmp(kbuf, "entitled_memory_weight")) {
645                 char *endp;
646                 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
647                 if (endp == tmp)
648                         return -EINVAL;
649 
650                 retval = update_mpp(NULL, new_weight_ptr);
651         } else
652                 return -EINVAL;
653 
654         if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
655                 retval = count;
656         } else if (retval == H_BUSY) {
657                 retval = -EBUSY;
658         } else if (retval == H_HARDWARE) {
659                 retval = -EIO;
660         } else if (retval == H_PARAMETER) {
661                 retval = -EINVAL;
662         }
663 
664         return retval;
665 }
666 
667 static int lparcfg_data(struct seq_file *m, void *v)
668 {
669         struct device_node *rootdn;
670         const char *model = "";
671         const char *system_id = "";
672         const char *tmp;
673         const __be32 *lp_index_ptr;
674         unsigned int lp_index = 0;
675 
676         seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS);
677 
678         rootdn = of_find_node_by_path("/");
679         if (rootdn) {
680                 tmp = of_get_property(rootdn, "model", NULL);
681                 if (tmp)
682                         model = tmp;
683                 tmp = of_get_property(rootdn, "system-id", NULL);
684                 if (tmp)
685                         system_id = tmp;
686                 lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
687                                         NULL);
688                 if (lp_index_ptr)
689                         lp_index = be32_to_cpup(lp_index_ptr);
690                 of_node_put(rootdn);
691         }
692         seq_printf(m, "serial_number=%s\n", system_id);
693         seq_printf(m, "system_type=%s\n", model);
694         seq_printf(m, "partition_id=%d\n", (int)lp_index);
695 
696         return pseries_lparcfg_data(m, v);
697 }
698 
699 static int lparcfg_open(struct inode *inode, struct file *file)
700 {
701         return single_open(file, lparcfg_data, NULL);
702 }
703 
704 static const struct file_operations lparcfg_fops = {
705         .read           = seq_read,
706         .write          = lparcfg_write,
707         .open           = lparcfg_open,
708         .release        = single_release,
709         .llseek         = seq_lseek,
710 };
711 
712 static int __init lparcfg_init(void)
713 {
714         umode_t mode = 0444;
715 
716         /* Allow writing if we have FW_FEATURE_SPLPAR */
717         if (firmware_has_feature(FW_FEATURE_SPLPAR))
718                 mode |= 0200;
719 
720         if (!proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_fops)) {
721                 printk(KERN_ERR "Failed to create powerpc/lparcfg\n");
722                 return -EIO;
723         }
724         return 0;
725 }
726 machine_device_initcall(pseries, lparcfg_init);
727 

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