2 * PowerPC64 LPAR Configuration Information Driver
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.
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.
17 * This driver creates a proc file at /proc/ppc64/lparcfg which contains
18 * keyword - value pairs that specify the configuration of the partition.
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>
33 #include <asm/system.h>
36 #include <asm/vdso_datapage.h>
40 #define MODULE_VERS "1.8"
41 #define MODULE_NAME "lparcfg"
43 /* #define LPARCFG_DEBUG */
45 static struct proc_dir_entry
*proc_ppc64_lparcfg
;
48 * Track sum of all purrs across all processors. This is used to further
49 * calculate usage values by different applications
51 static unsigned long get_purr(void)
53 unsigned long sum_purr
= 0;
56 for_each_possible_cpu(cpu
) {
57 if (firmware_has_feature(FW_FEATURE_ISERIES
))
58 sum_purr
+= lppaca
[cpu
].emulated_time_base
;
62 cu
= &per_cpu(cpu_usage_array
, cpu
);
63 sum_purr
+= cu
->current_tb
;
69 #ifdef CONFIG_PPC_ISERIES
72 * Methods used to fetch LPAR data when running on an iSeries platform.
74 static int iseries_lparcfg_data(struct seq_file
*m
, void *v
)
76 unsigned long pool_id
;
77 int shared
, entitled_capacity
, max_entitled_capacity
;
78 int processors
, max_processors
;
79 unsigned long purr
= get_purr();
81 shared
= (int)(local_paca
->lppaca_ptr
->shared_proc
);
83 seq_printf(m
, "system_active_processors=%d\n",
84 (int)HvLpConfig_getSystemPhysicalProcessors());
86 seq_printf(m
, "system_potential_processors=%d\n",
87 (int)HvLpConfig_getSystemPhysicalProcessors());
89 processors
= (int)HvLpConfig_getPhysicalProcessors();
90 seq_printf(m
, "partition_active_processors=%d\n", processors
);
92 max_processors
= (int)HvLpConfig_getMaxPhysicalProcessors();
93 seq_printf(m
, "partition_potential_processors=%d\n", max_processors
);
96 entitled_capacity
= HvLpConfig_getSharedProcUnits();
97 max_entitled_capacity
= HvLpConfig_getMaxSharedProcUnits();
99 entitled_capacity
= processors
* 100;
100 max_entitled_capacity
= max_processors
* 100;
102 seq_printf(m
, "partition_entitled_capacity=%d\n", entitled_capacity
);
104 seq_printf(m
, "partition_max_entitled_capacity=%d\n",
105 max_entitled_capacity
);
108 pool_id
= HvLpConfig_getSharedPoolIndex();
109 seq_printf(m
, "pool=%d\n", (int)pool_id
);
110 seq_printf(m
, "pool_capacity=%d\n",
111 (int)(HvLpConfig_getNumProcsInSharedPool(pool_id
) *
113 seq_printf(m
, "purr=%ld\n", purr
);
116 seq_printf(m
, "shared_processor_mode=%d\n", shared
);
121 #else /* CONFIG_PPC_ISERIES */
123 static int iseries_lparcfg_data(struct seq_file
*m
, void *v
)
128 #endif /* CONFIG_PPC_ISERIES */
130 #ifdef CONFIG_PPC_PSERIES
132 * Methods used to fetch LPAR data when running on a pSeries platform.
136 * H_GET_MPP hcall returns info in 7 parms
138 int h_get_mpp(struct hvcall_mpp_data
*mpp_data
)
141 unsigned long retbuf
[PLPAR_HCALL9_BUFSIZE
];
143 rc
= plpar_hcall9(H_GET_MPP
, retbuf
);
145 mpp_data
->entitled_mem
= retbuf
[0];
146 mpp_data
->mapped_mem
= retbuf
[1];
148 mpp_data
->group_num
= (retbuf
[2] >> 2 * 8) & 0xffff;
149 mpp_data
->pool_num
= retbuf
[2] & 0xffff;
151 mpp_data
->mem_weight
= (retbuf
[3] >> 7 * 8) & 0xff;
152 mpp_data
->unallocated_mem_weight
= (retbuf
[3] >> 6 * 8) & 0xff;
153 mpp_data
->unallocated_entitlement
= retbuf
[3] & 0xffffffffffff;
155 mpp_data
->pool_size
= retbuf
[4];
156 mpp_data
->loan_request
= retbuf
[5];
157 mpp_data
->backing_mem
= retbuf
[6];
161 EXPORT_SYMBOL(h_get_mpp
);
163 struct hvcall_ppp_data
{
165 u64 unallocated_entitlement
;
170 u8 unallocated_weight
;
171 u16 active_procs_in_pool
;
172 u16 active_system_procs
;
176 * H_GET_PPP hcall returns info in 4 parms.
177 * entitled_capacity,unallocated_capacity,
178 * aggregation, resource_capability).
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).
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.
195 static unsigned int h_get_ppp(struct hvcall_ppp_data
*ppp_data
)
198 unsigned long retbuf
[PLPAR_HCALL_BUFSIZE
];
200 rc
= plpar_hcall(H_GET_PPP
, retbuf
);
202 ppp_data
->entitlement
= retbuf
[0];
203 ppp_data
->unallocated_entitlement
= retbuf
[1];
205 ppp_data
->group_num
= (retbuf
[2] >> 2 * 8) & 0xffff;
206 ppp_data
->pool_num
= retbuf
[2] & 0xffff;
208 ppp_data
->capped
= (retbuf
[3] >> 6 * 8) & 0x01;
209 ppp_data
->weight
= (retbuf
[3] >> 5 * 8) & 0xff;
210 ppp_data
->unallocated_weight
= (retbuf
[3] >> 4 * 8) & 0xff;
211 ppp_data
->active_procs_in_pool
= (retbuf
[3] >> 2 * 8) & 0xffff;
212 ppp_data
->active_system_procs
= retbuf
[3] & 0xffff;
217 static unsigned h_pic(unsigned long *pool_idle_time
,
218 unsigned long *num_procs
)
221 unsigned long retbuf
[PLPAR_HCALL_BUFSIZE
];
223 rc
= plpar_hcall(H_PIC
, retbuf
);
225 *pool_idle_time
= retbuf
[0];
226 *num_procs
= retbuf
[1];
233 * Parse out the data returned from h_get_ppp and h_pic
235 static void parse_ppp_data(struct seq_file
*m
)
237 struct hvcall_ppp_data ppp_data
;
240 rc
= h_get_ppp(&ppp_data
);
244 seq_printf(m
, "partition_entitled_capacity=%lld\n",
245 ppp_data
.entitlement
);
246 seq_printf(m
, "group=%d\n", ppp_data
.group_num
);
247 seq_printf(m
, "system_active_processors=%d\n",
248 ppp_data
.active_system_procs
);
250 /* pool related entries are apropriate for shared configs */
251 if (lppaca
[0].shared_proc
) {
252 unsigned long pool_idle_time
, pool_procs
;
254 seq_printf(m
, "pool=%d\n", ppp_data
.pool_num
);
256 /* report pool_capacity in percentage */
257 seq_printf(m
, "pool_capacity=%d\n",
258 ppp_data
.active_procs_in_pool
* 100);
260 h_pic(&pool_idle_time
, &pool_procs
);
261 seq_printf(m
, "pool_idle_time=%ld\n", pool_idle_time
);
262 seq_printf(m
, "pool_num_procs=%ld\n", pool_procs
);
265 seq_printf(m
, "unallocated_capacity_weight=%d\n",
266 ppp_data
.unallocated_weight
);
267 seq_printf(m
, "capacity_weight=%d\n", ppp_data
.weight
);
268 seq_printf(m
, "capped=%d\n", ppp_data
.capped
);
269 seq_printf(m
, "unallocated_capacity=%lld\n",
270 ppp_data
.unallocated_entitlement
);
275 * Parse out data returned from h_get_mpp
277 static void parse_mpp_data(struct seq_file
*m
)
279 struct hvcall_mpp_data mpp_data
;
282 rc
= h_get_mpp(&mpp_data
);
286 seq_printf(m
, "entitled_memory=%ld\n", mpp_data
.entitled_mem
);
288 if (mpp_data
.mapped_mem
!= -1)
289 seq_printf(m
, "mapped_entitled_memory=%ld\n",
290 mpp_data
.mapped_mem
);
292 seq_printf(m
, "entitled_memory_group_number=%d\n", mpp_data
.group_num
);
293 seq_printf(m
, "entitled_memory_pool_number=%d\n", mpp_data
.pool_num
);
295 seq_printf(m
, "entitled_memory_weight=%d\n", mpp_data
.mem_weight
);
296 seq_printf(m
, "unallocated_entitled_memory_weight=%d\n",
297 mpp_data
.unallocated_mem_weight
);
298 seq_printf(m
, "unallocated_io_mapping_entitlement=%ld\n",
299 mpp_data
.unallocated_entitlement
);
301 if (mpp_data
.pool_size
!= -1)
302 seq_printf(m
, "entitled_memory_pool_size=%ld bytes\n",
305 seq_printf(m
, "entitled_memory_loan_request=%ld\n",
306 mpp_data
.loan_request
);
308 seq_printf(m
, "backing_memory=%ld bytes\n", mpp_data
.backing_mem
);
311 #define SPLPAR_CHARACTERISTICS_TOKEN 20
312 #define SPLPAR_MAXLENGTH 1026*(sizeof(char))
315 * parse_system_parameter_string()
316 * Retrieve the potential_processors, max_entitled_capacity and friends
317 * through the get-system-parameter rtas call. Replace keyword strings as
320 static void parse_system_parameter_string(struct seq_file
*m
)
324 unsigned char *local_buffer
= kmalloc(SPLPAR_MAXLENGTH
, GFP_KERNEL
);
326 printk(KERN_ERR
"%s %s kmalloc failure at line %d \n",
327 __FILE__
, __func__
, __LINE__
);
331 spin_lock(&rtas_data_buf_lock
);
332 memset(rtas_data_buf
, 0, SPLPAR_MAXLENGTH
);
333 call_status
= rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
335 SPLPAR_CHARACTERISTICS_TOKEN
,
338 memcpy(local_buffer
, rtas_data_buf
, SPLPAR_MAXLENGTH
);
339 spin_unlock(&rtas_data_buf_lock
);
341 if (call_status
!= 0) {
343 "%s %s Error calling get-system-parameter (0x%x)\n",
344 __FILE__
, __func__
, call_status
);
348 char *workbuffer
= kzalloc(SPLPAR_MAXLENGTH
, GFP_KERNEL
);
350 printk(KERN_ERR
"%s %s kmalloc failure at line %d \n",
351 __FILE__
, __func__
, __LINE__
);
356 printk(KERN_INFO
"success calling get-system-parameter \n");
358 splpar_strlen
= local_buffer
[0] * 256 + local_buffer
[1];
359 local_buffer
+= 2; /* step over strlen value */
363 while ((*local_buffer
) && (idx
< splpar_strlen
)) {
364 workbuffer
[w_idx
++] = local_buffer
[idx
++];
365 if ((local_buffer
[idx
] == ',')
366 || (local_buffer
[idx
] == '\0')) {
367 workbuffer
[w_idx
] = '\0';
369 /* avoid the empty string */
370 seq_printf(m
, "%s\n", workbuffer
);
372 memset(workbuffer
, 0, SPLPAR_MAXLENGTH
);
373 idx
++; /* skip the comma */
375 } else if (local_buffer
[idx
] == '=') {
376 /* code here to replace workbuffer contents
377 with different keyword strings */
378 if (0 == strcmp(workbuffer
, "MaxEntCap")) {
380 "partition_max_entitled_capacity");
381 w_idx
= strlen(workbuffer
);
383 if (0 == strcmp(workbuffer
, "MaxPlatProcs")) {
385 "system_potential_processors");
386 w_idx
= strlen(workbuffer
);
391 local_buffer
-= 2; /* back up over strlen value */
396 /* Return the number of processors in the system.
397 * This function reads through the device tree and counts
398 * the virtual processors, this does not include threads.
400 static int lparcfg_count_active_processors(void)
402 struct device_node
*cpus_dn
= NULL
;
405 while ((cpus_dn
= of_find_node_by_type(cpus_dn
, "cpu"))) {
407 printk(KERN_ERR
"cpus_dn %p \n", cpus_dn
);
414 static void pseries_cmo_data(struct seq_file
*m
)
417 unsigned long cmo_faults
= 0;
418 unsigned long cmo_fault_time
= 0;
420 seq_printf(m
, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO
));
422 if (!firmware_has_feature(FW_FEATURE_CMO
))
425 for_each_possible_cpu(cpu
) {
426 cmo_faults
+= lppaca
[cpu
].cmo_faults
;
427 cmo_fault_time
+= lppaca
[cpu
].cmo_fault_time
;
430 seq_printf(m
, "cmo_faults=%lu\n", cmo_faults
);
431 seq_printf(m
, "cmo_fault_time_usec=%lu\n",
432 cmo_fault_time
/ tb_ticks_per_usec
);
433 seq_printf(m
, "cmo_primary_psp=%d\n", cmo_get_primary_psp());
434 seq_printf(m
, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp());
435 seq_printf(m
, "cmo_page_size=%lu\n", cmo_get_page_size());
438 static void splpar_dispatch_data(struct seq_file
*m
)
441 unsigned long dispatches
= 0;
442 unsigned long dispatch_dispersions
= 0;
444 for_each_possible_cpu(cpu
) {
445 dispatches
+= lppaca
[cpu
].yield_count
;
446 dispatch_dispersions
+= lppaca
[cpu
].dispersion_count
;
449 seq_printf(m
, "dispatches=%lu\n", dispatches
);
450 seq_printf(m
, "dispatch_dispersions=%lu\n", dispatch_dispersions
);
453 static int pseries_lparcfg_data(struct seq_file
*m
, void *v
)
455 int partition_potential_processors
;
456 int partition_active_processors
;
457 struct device_node
*rtas_node
;
458 const int *lrdrp
= NULL
;
460 rtas_node
= of_find_node_by_path("/rtas");
462 lrdrp
= of_get_property(rtas_node
, "ibm,lrdr-capacity", NULL
);
465 partition_potential_processors
= vdso_data
->processorCount
;
467 partition_potential_processors
= *(lrdrp
+ 4);
469 of_node_put(rtas_node
);
471 partition_active_processors
= lparcfg_count_active_processors();
473 if (firmware_has_feature(FW_FEATURE_SPLPAR
)) {
474 /* this call handles the ibm,get-system-parameter contents */
475 parse_system_parameter_string(m
);
479 splpar_dispatch_data(m
);
481 seq_printf(m
, "purr=%ld\n", get_purr());
482 } else { /* non SPLPAR case */
484 seq_printf(m
, "system_active_processors=%d\n",
485 partition_potential_processors
);
487 seq_printf(m
, "system_potential_processors=%d\n",
488 partition_potential_processors
);
490 seq_printf(m
, "partition_max_entitled_capacity=%d\n",
491 partition_potential_processors
* 100);
493 seq_printf(m
, "partition_entitled_capacity=%d\n",
494 partition_active_processors
* 100);
497 seq_printf(m
, "partition_active_processors=%d\n",
498 partition_active_processors
);
500 seq_printf(m
, "partition_potential_processors=%d\n",
501 partition_potential_processors
);
503 seq_printf(m
, "shared_processor_mode=%d\n", lppaca
[0].shared_proc
);
505 seq_printf(m
, "slb_size=%d\n", mmu_slb_size
);
510 static ssize_t
update_ppp(u64
*entitlement
, u8
*weight
)
512 struct hvcall_ppp_data ppp_data
;
517 /* Get our current parameters */
518 retval
= h_get_ppp(&ppp_data
);
523 new_weight
= ppp_data
.weight
;
524 new_entitled
= *entitlement
;
526 new_weight
= *weight
;
527 new_entitled
= ppp_data
.entitlement
;
531 pr_debug("%s: current_entitled = %llu, current_weight = %u\n",
532 __func__
, ppp_data
.entitlement
, ppp_data
.weight
);
534 pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
535 __func__
, new_entitled
, new_weight
);
537 retval
= plpar_hcall_norets(H_SET_PPP
, new_entitled
, new_weight
);
544 * Update the memory entitlement and weight for the partition. Caller must
545 * specify either a new entitlement or weight, not both, to be updated
546 * since the h_set_mpp call takes both entitlement and weight as parameters.
548 static ssize_t
update_mpp(u64
*entitlement
, u8
*weight
)
550 struct hvcall_mpp_data mpp_data
;
556 /* Check with vio to ensure the new memory entitlement
559 rc
= vio_cmo_entitlement_update(*entitlement
);
564 rc
= h_get_mpp(&mpp_data
);
569 new_weight
= mpp_data
.mem_weight
;
570 new_entitled
= *entitlement
;
572 new_weight
= *weight
;
573 new_entitled
= mpp_data
.entitled_mem
;
577 pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
578 __func__
, mpp_data
.entitled_mem
, mpp_data
.mem_weight
);
580 pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
581 __func__
, new_entitled
, new_weight
);
583 rc
= plpar_hcall_norets(H_SET_MPP
, new_entitled
, new_weight
);
588 * Interface for changing system parameters (variable capacity weight
589 * and entitled capacity). Format of input is "param_name=value";
590 * anything after value is ignored. Valid parameters at this time are
591 * "partition_entitled_capacity" and "capacity_weight". We use
592 * H_SET_PPP to alter parameters.
594 * This function should be invoked only on systems with
597 static ssize_t
lparcfg_write(struct file
*file
, const char __user
* buf
,
598 size_t count
, loff_t
* off
)
603 u64 new_entitled
, *new_entitled_ptr
= &new_entitled
;
604 u8 new_weight
, *new_weight_ptr
= &new_weight
;
607 if (!firmware_has_feature(FW_FEATURE_SPLPAR
) ||
608 firmware_has_feature(FW_FEATURE_ISERIES
))
614 if (copy_from_user(kbuf
, buf
, count
))
617 kbuf
[count
- 1] = '\0';
618 tmp
= strchr(kbuf
, '=');
624 if (!strcmp(kbuf
, "partition_entitled_capacity")) {
626 *new_entitled_ptr
= (u64
) simple_strtoul(tmp
, &endp
, 10);
630 retval
= update_ppp(new_entitled_ptr
, NULL
);
631 } else if (!strcmp(kbuf
, "capacity_weight")) {
633 *new_weight_ptr
= (u8
) simple_strtoul(tmp
, &endp
, 10);
637 retval
= update_ppp(NULL
, new_weight_ptr
);
638 } else if (!strcmp(kbuf
, "entitled_memory")) {
640 *new_entitled_ptr
= (u64
) simple_strtoul(tmp
, &endp
, 10);
644 retval
= update_mpp(new_entitled_ptr
, NULL
);
645 } else if (!strcmp(kbuf
, "entitled_memory_weight")) {
647 *new_weight_ptr
= (u8
) simple_strtoul(tmp
, &endp
, 10);
651 retval
= update_mpp(NULL
, new_weight_ptr
);
655 if (retval
== H_SUCCESS
|| retval
== H_CONSTRAINED
) {
657 } else if (retval
== H_BUSY
) {
659 } else if (retval
== H_HARDWARE
) {
661 } else if (retval
== H_PARAMETER
) {
668 #else /* CONFIG_PPC_PSERIES */
670 static int pseries_lparcfg_data(struct seq_file
*m
, void *v
)
675 static ssize_t
lparcfg_write(struct file
*file
, const char __user
* buf
,
676 size_t count
, loff_t
* off
)
681 #endif /* CONFIG_PPC_PSERIES */
683 static int lparcfg_data(struct seq_file
*m
, void *v
)
685 struct device_node
*rootdn
;
686 const char *model
= "";
687 const char *system_id
= "";
689 const unsigned int *lp_index_ptr
;
690 unsigned int lp_index
= 0;
692 seq_printf(m
, "%s %s \n", MODULE_NAME
, MODULE_VERS
);
694 rootdn
= of_find_node_by_path("/");
696 tmp
= of_get_property(rootdn
, "model", NULL
);
699 /* Skip "IBM," - see platforms/iseries/dt.c */
700 if (firmware_has_feature(FW_FEATURE_ISERIES
))
703 tmp
= of_get_property(rootdn
, "system-id", NULL
);
706 /* Skip "IBM," - see platforms/iseries/dt.c */
707 if (firmware_has_feature(FW_FEATURE_ISERIES
))
710 lp_index_ptr
= of_get_property(rootdn
, "ibm,partition-no",
713 lp_index
= *lp_index_ptr
;
716 seq_printf(m
, "serial_number=%s\n", system_id
);
717 seq_printf(m
, "system_type=%s\n", model
);
718 seq_printf(m
, "partition_id=%d\n", (int)lp_index
);
720 if (firmware_has_feature(FW_FEATURE_ISERIES
))
721 return iseries_lparcfg_data(m
, v
);
722 return pseries_lparcfg_data(m
, v
);
725 static int lparcfg_open(struct inode
*inode
, struct file
*file
)
727 return single_open(file
, lparcfg_data
, NULL
);
730 static const struct file_operations lparcfg_fops
= {
731 .owner
= THIS_MODULE
,
733 .write
= lparcfg_write
,
734 .open
= lparcfg_open
,
735 .release
= single_release
,
738 static int __init
lparcfg_init(void)
740 struct proc_dir_entry
*ent
;
741 mode_t mode
= S_IRUSR
| S_IRGRP
| S_IROTH
;
743 /* Allow writing if we have FW_FEATURE_SPLPAR */
744 if (firmware_has_feature(FW_FEATURE_SPLPAR
) &&
745 !firmware_has_feature(FW_FEATURE_ISERIES
))
748 ent
= proc_create("ppc64/lparcfg", mode
, NULL
, &lparcfg_fops
);
750 printk(KERN_ERR
"Failed to create ppc64/lparcfg\n");
754 proc_ppc64_lparcfg
= ent
;
758 static void __exit
lparcfg_cleanup(void)
760 if (proc_ppc64_lparcfg
)
761 remove_proc_entry("lparcfg", proc_ppc64_lparcfg
->parent
);
764 module_init(lparcfg_init
);
765 module_exit(lparcfg_cleanup
);
766 MODULE_DESCRIPTION("Interface for LPAR configuration data");
767 MODULE_AUTHOR("Dave Engebretsen");
768 MODULE_LICENSE("GPL");