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>
39 #define MODULE_VERS "1.8"
40 #define MODULE_NAME "lparcfg"
42 /* #define LPARCFG_DEBUG */
44 static struct proc_dir_entry
*proc_ppc64_lparcfg
;
47 * Track sum of all purrs across all processors. This is used to further
48 * calculate usage values by different applications
50 static unsigned long get_purr(void)
52 unsigned long sum_purr
= 0;
55 for_each_possible_cpu(cpu
) {
56 if (firmware_has_feature(FW_FEATURE_ISERIES
))
57 sum_purr
+= lppaca
[cpu
].emulated_time_base
;
61 cu
= &per_cpu(cpu_usage_array
, cpu
);
62 sum_purr
+= cu
->current_tb
;
68 #ifdef CONFIG_PPC_ISERIES
71 * Methods used to fetch LPAR data when running on an iSeries platform.
73 static int iseries_lparcfg_data(struct seq_file
*m
, void *v
)
75 unsigned long pool_id
;
76 int shared
, entitled_capacity
, max_entitled_capacity
;
77 int processors
, max_processors
;
78 unsigned long purr
= get_purr();
80 shared
= (int)(local_paca
->lppaca_ptr
->shared_proc
);
82 seq_printf(m
, "system_active_processors=%d\n",
83 (int)HvLpConfig_getSystemPhysicalProcessors());
85 seq_printf(m
, "system_potential_processors=%d\n",
86 (int)HvLpConfig_getSystemPhysicalProcessors());
88 processors
= (int)HvLpConfig_getPhysicalProcessors();
89 seq_printf(m
, "partition_active_processors=%d\n", processors
);
91 max_processors
= (int)HvLpConfig_getMaxPhysicalProcessors();
92 seq_printf(m
, "partition_potential_processors=%d\n", max_processors
);
95 entitled_capacity
= HvLpConfig_getSharedProcUnits();
96 max_entitled_capacity
= HvLpConfig_getMaxSharedProcUnits();
98 entitled_capacity
= processors
* 100;
99 max_entitled_capacity
= max_processors
* 100;
101 seq_printf(m
, "partition_entitled_capacity=%d\n", entitled_capacity
);
103 seq_printf(m
, "partition_max_entitled_capacity=%d\n",
104 max_entitled_capacity
);
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
) *
112 seq_printf(m
, "purr=%ld\n", purr
);
115 seq_printf(m
, "shared_processor_mode=%d\n", shared
);
120 #else /* CONFIG_PPC_ISERIES */
122 static int iseries_lparcfg_data(struct seq_file
*m
, void *v
)
127 #endif /* CONFIG_PPC_ISERIES */
129 #ifdef CONFIG_PPC_PSERIES
131 * Methods used to fetch LPAR data when running on a pSeries platform.
135 * H_GET_MPP hcall returns info in 7 parms
137 int h_get_mpp(struct hvcall_mpp_data
*mpp_data
)
140 unsigned long retbuf
[PLPAR_HCALL9_BUFSIZE
];
142 rc
= plpar_hcall9(H_GET_MPP
, retbuf
);
144 mpp_data
->entitled_mem
= retbuf
[0];
145 mpp_data
->mapped_mem
= retbuf
[1];
147 mpp_data
->group_num
= (retbuf
[2] >> 2 * 8) & 0xffff;
148 mpp_data
->pool_num
= retbuf
[2] & 0xffff;
150 mpp_data
->mem_weight
= (retbuf
[3] >> 7 * 8) & 0xff;
151 mpp_data
->unallocated_mem_weight
= (retbuf
[3] >> 6 * 8) & 0xff;
152 mpp_data
->unallocated_entitlement
= retbuf
[3] & 0xffffffffffff;
154 mpp_data
->pool_size
= retbuf
[4];
155 mpp_data
->loan_request
= retbuf
[5];
156 mpp_data
->backing_mem
= retbuf
[6];
160 EXPORT_SYMBOL(h_get_mpp
);
162 struct hvcall_ppp_data
{
164 u64 unallocated_entitlement
;
169 u8 unallocated_weight
;
170 u16 active_procs_in_pool
;
171 u16 active_system_procs
;
175 * H_GET_PPP hcall returns info in 4 parms.
176 * entitled_capacity,unallocated_capacity,
177 * aggregation, resource_capability).
179 * R4 = Entitled Processor Capacity Percentage.
180 * R5 = Unallocated Processor Capacity Percentage.
181 * R6 (AABBCCDDEEFFGGHH).
182 * XXXX - reserved (0)
183 * XXXX - reserved (0)
184 * XXXX - Group Number
185 * XXXX - Pool Number.
186 * R7 (IIJJKKLLMMNNOOPP).
188 * XX - bit 0-6 reserved (0). bit 7 is Capped indicator.
189 * XX - variable processor Capacity Weight
190 * XX - Unallocated Variable Processor Capacity Weight.
191 * XXXX - Active processors in Physical Processor Pool.
192 * XXXX - Processors active on platform.
194 static unsigned int h_get_ppp(struct hvcall_ppp_data
*ppp_data
)
197 unsigned long retbuf
[PLPAR_HCALL_BUFSIZE
];
199 rc
= plpar_hcall(H_GET_PPP
, retbuf
);
201 ppp_data
->entitlement
= retbuf
[0];
202 ppp_data
->unallocated_entitlement
= retbuf
[1];
204 ppp_data
->group_num
= (retbuf
[2] >> 2 * 8) & 0xffff;
205 ppp_data
->pool_num
= retbuf
[2] & 0xffff;
207 ppp_data
->capped
= (retbuf
[3] >> 6 * 8) & 0x01;
208 ppp_data
->weight
= (retbuf
[3] >> 5 * 8) & 0xff;
209 ppp_data
->unallocated_weight
= (retbuf
[3] >> 4 * 8) & 0xff;
210 ppp_data
->active_procs_in_pool
= (retbuf
[3] >> 2 * 8) & 0xffff;
211 ppp_data
->active_system_procs
= retbuf
[3] & 0xffff;
216 static unsigned h_pic(unsigned long *pool_idle_time
,
217 unsigned long *num_procs
)
220 unsigned long retbuf
[PLPAR_HCALL_BUFSIZE
];
222 rc
= plpar_hcall(H_PIC
, retbuf
);
224 *pool_idle_time
= retbuf
[0];
225 *num_procs
= retbuf
[1];
232 * Parse out the data returned from h_get_ppp and h_pic
234 static void parse_ppp_data(struct seq_file
*m
)
236 struct hvcall_ppp_data ppp_data
;
239 rc
= h_get_ppp(&ppp_data
);
243 seq_printf(m
, "partition_entitled_capacity=%ld\n",
244 ppp_data
.entitlement
);
245 seq_printf(m
, "group=%d\n", ppp_data
.group_num
);
246 seq_printf(m
, "system_active_processors=%d\n",
247 ppp_data
.active_system_procs
);
249 /* pool related entries are apropriate for shared configs */
250 if (lppaca
[0].shared_proc
) {
251 unsigned long pool_idle_time
, pool_procs
;
253 seq_printf(m
, "pool=%d\n", ppp_data
.pool_num
);
255 /* report pool_capacity in percentage */
256 seq_printf(m
, "pool_capacity=%d\n",
257 ppp_data
.active_procs_in_pool
* 100);
259 h_pic(&pool_idle_time
, &pool_procs
);
260 seq_printf(m
, "pool_idle_time=%ld\n", pool_idle_time
);
261 seq_printf(m
, "pool_num_procs=%ld\n", pool_procs
);
264 seq_printf(m
, "unallocated_capacity_weight=%d\n",
265 ppp_data
.unallocated_weight
);
266 seq_printf(m
, "capacity_weight=%d\n", ppp_data
.weight
);
267 seq_printf(m
, "capped=%d\n", ppp_data
.capped
);
268 seq_printf(m
, "unallocated_capacity=%ld\n",
269 ppp_data
.unallocated_entitlement
);
274 * Parse out data returned from h_get_mpp
276 static void parse_mpp_data(struct seq_file
*m
)
278 struct hvcall_mpp_data mpp_data
;
281 rc
= h_get_mpp(&mpp_data
);
285 seq_printf(m
, "entitled_memory=%ld\n", mpp_data
.entitled_mem
);
287 if (mpp_data
.mapped_mem
!= -1)
288 seq_printf(m
, "mapped_entitled_memory=%ld\n",
289 mpp_data
.mapped_mem
);
291 seq_printf(m
, "entitled_memory_group_number=%d\n", mpp_data
.group_num
);
292 seq_printf(m
, "entitled_memory_pool_number=%d\n", mpp_data
.pool_num
);
294 seq_printf(m
, "entitled_memory_weight=%d\n", mpp_data
.mem_weight
);
295 seq_printf(m
, "unallocated_entitled_memory_weight=%d\n",
296 mpp_data
.unallocated_mem_weight
);
297 seq_printf(m
, "unallocated_io_mapping_entitlement=%ld\n",
298 mpp_data
.unallocated_entitlement
);
300 if (mpp_data
.pool_size
!= -1)
301 seq_printf(m
, "entitled_memory_pool_size=%ld bytes\n",
304 seq_printf(m
, "entitled_memory_loan_request=%ld\n",
305 mpp_data
.loan_request
);
307 seq_printf(m
, "backing_memory=%ld bytes\n", mpp_data
.backing_mem
);
310 #define SPLPAR_CHARACTERISTICS_TOKEN 20
311 #define SPLPAR_MAXLENGTH 1026*(sizeof(char))
314 * parse_system_parameter_string()
315 * Retrieve the potential_processors, max_entitled_capacity and friends
316 * through the get-system-parameter rtas call. Replace keyword strings as
319 static void parse_system_parameter_string(struct seq_file
*m
)
323 unsigned char *local_buffer
= kmalloc(SPLPAR_MAXLENGTH
, GFP_KERNEL
);
325 printk(KERN_ERR
"%s %s kmalloc failure at line %d \n",
326 __FILE__
, __func__
, __LINE__
);
330 spin_lock(&rtas_data_buf_lock
);
331 memset(rtas_data_buf
, 0, SPLPAR_MAXLENGTH
);
332 call_status
= rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
334 SPLPAR_CHARACTERISTICS_TOKEN
,
337 memcpy(local_buffer
, rtas_data_buf
, SPLPAR_MAXLENGTH
);
338 spin_unlock(&rtas_data_buf_lock
);
340 if (call_status
!= 0) {
342 "%s %s Error calling get-system-parameter (0x%x)\n",
343 __FILE__
, __func__
, call_status
);
347 char *workbuffer
= kzalloc(SPLPAR_MAXLENGTH
, GFP_KERNEL
);
349 printk(KERN_ERR
"%s %s kmalloc failure at line %d \n",
350 __FILE__
, __func__
, __LINE__
);
355 printk(KERN_INFO
"success calling get-system-parameter \n");
357 splpar_strlen
= local_buffer
[0] * 256 + local_buffer
[1];
358 local_buffer
+= 2; /* step over strlen value */
362 while ((*local_buffer
) && (idx
< splpar_strlen
)) {
363 workbuffer
[w_idx
++] = local_buffer
[idx
++];
364 if ((local_buffer
[idx
] == ',')
365 || (local_buffer
[idx
] == '\0')) {
366 workbuffer
[w_idx
] = '\0';
368 /* avoid the empty string */
369 seq_printf(m
, "%s\n", workbuffer
);
371 memset(workbuffer
, 0, SPLPAR_MAXLENGTH
);
372 idx
++; /* skip the comma */
374 } else if (local_buffer
[idx
] == '=') {
375 /* code here to replace workbuffer contents
376 with different keyword strings */
377 if (0 == strcmp(workbuffer
, "MaxEntCap")) {
379 "partition_max_entitled_capacity");
380 w_idx
= strlen(workbuffer
);
382 if (0 == strcmp(workbuffer
, "MaxPlatProcs")) {
384 "system_potential_processors");
385 w_idx
= strlen(workbuffer
);
390 local_buffer
-= 2; /* back up over strlen value */
395 /* Return the number of processors in the system.
396 * This function reads through the device tree and counts
397 * the virtual processors, this does not include threads.
399 static int lparcfg_count_active_processors(void)
401 struct device_node
*cpus_dn
= NULL
;
404 while ((cpus_dn
= of_find_node_by_type(cpus_dn
, "cpu"))) {
406 printk(KERN_ERR
"cpus_dn %p \n", cpus_dn
);
413 static void pseries_cmo_data(struct seq_file
*m
)
416 unsigned long cmo_faults
= 0;
417 unsigned long cmo_fault_time
= 0;
419 seq_printf(m
, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO
));
421 if (!firmware_has_feature(FW_FEATURE_CMO
))
424 for_each_possible_cpu(cpu
) {
425 cmo_faults
+= lppaca
[cpu
].cmo_faults
;
426 cmo_fault_time
+= lppaca
[cpu
].cmo_fault_time
;
429 seq_printf(m
, "cmo_faults=%lu\n", cmo_faults
);
430 seq_printf(m
, "cmo_fault_time_usec=%lu\n",
431 cmo_fault_time
/ tb_ticks_per_usec
);
432 seq_printf(m
, "cmo_primary_psp=%d\n", cmo_get_primary_psp());
433 seq_printf(m
, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp());
434 seq_printf(m
, "cmo_page_size=%lu\n", cmo_get_page_size());
437 static int pseries_lparcfg_data(struct seq_file
*m
, void *v
)
439 int partition_potential_processors
;
440 int partition_active_processors
;
441 struct device_node
*rtas_node
;
442 const int *lrdrp
= NULL
;
444 rtas_node
= of_find_node_by_path("/rtas");
446 lrdrp
= of_get_property(rtas_node
, "ibm,lrdr-capacity", NULL
);
449 partition_potential_processors
= vdso_data
->processorCount
;
451 partition_potential_processors
= *(lrdrp
+ 4);
453 of_node_put(rtas_node
);
455 partition_active_processors
= lparcfg_count_active_processors();
457 if (firmware_has_feature(FW_FEATURE_SPLPAR
)) {
458 /* this call handles the ibm,get-system-parameter contents */
459 parse_system_parameter_string(m
);
464 seq_printf(m
, "purr=%ld\n", get_purr());
465 } else { /* non SPLPAR case */
467 seq_printf(m
, "system_active_processors=%d\n",
468 partition_potential_processors
);
470 seq_printf(m
, "system_potential_processors=%d\n",
471 partition_potential_processors
);
473 seq_printf(m
, "partition_max_entitled_capacity=%d\n",
474 partition_potential_processors
* 100);
476 seq_printf(m
, "partition_entitled_capacity=%d\n",
477 partition_active_processors
* 100);
480 seq_printf(m
, "partition_active_processors=%d\n",
481 partition_active_processors
);
483 seq_printf(m
, "partition_potential_processors=%d\n",
484 partition_potential_processors
);
486 seq_printf(m
, "shared_processor_mode=%d\n", lppaca
[0].shared_proc
);
491 static ssize_t
update_ppp(u64
*entitlement
, u8
*weight
)
493 struct hvcall_ppp_data ppp_data
;
498 /* Get our current parameters */
499 retval
= h_get_ppp(&ppp_data
);
504 new_weight
= ppp_data
.weight
;
505 new_entitled
= *entitlement
;
507 new_weight
= *weight
;
508 new_entitled
= ppp_data
.entitlement
;
512 pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
513 __FUNCTION__
, ppp_data
.entitlement
, ppp_data
.weight
);
515 pr_debug("%s: new_entitled = %lu, new_weight = %u\n",
516 __FUNCTION__
, new_entitled
, new_weight
);
518 retval
= plpar_hcall_norets(H_SET_PPP
, new_entitled
, new_weight
);
525 * Update the memory entitlement and weight for the partition. Caller must
526 * specify either a new entitlement or weight, not both, to be updated
527 * since the h_set_mpp call takes both entitlement and weight as parameters.
529 static ssize_t
update_mpp(u64
*entitlement
, u8
*weight
)
531 struct hvcall_mpp_data mpp_data
;
537 /* Check with vio to ensure the new memory entitlement
540 rc
= vio_cmo_entitlement_update(*entitlement
);
545 rc
= h_get_mpp(&mpp_data
);
550 new_weight
= mpp_data
.mem_weight
;
551 new_entitled
= *entitlement
;
553 new_weight
= *weight
;
554 new_entitled
= mpp_data
.entitled_mem
;
558 pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
559 __FUNCTION__
, mpp_data
.entitled_mem
, mpp_data
.mem_weight
);
561 pr_debug("%s: new_entitled = %lu, new_weight = %u\n",
562 __FUNCTION__
, new_entitled
, new_weight
);
564 rc
= plpar_hcall_norets(H_SET_MPP
, new_entitled
, new_weight
);
569 * Interface for changing system parameters (variable capacity weight
570 * and entitled capacity). Format of input is "param_name=value";
571 * anything after value is ignored. Valid parameters at this time are
572 * "partition_entitled_capacity" and "capacity_weight". We use
573 * H_SET_PPP to alter parameters.
575 * This function should be invoked only on systems with
578 static ssize_t
lparcfg_write(struct file
*file
, const char __user
* buf
,
579 size_t count
, loff_t
* off
)
584 u64 new_entitled
, *new_entitled_ptr
= &new_entitled
;
585 u8 new_weight
, *new_weight_ptr
= &new_weight
;
588 if (!firmware_has_feature(FW_FEATURE_SPLPAR
) ||
589 firmware_has_feature(FW_FEATURE_ISERIES
))
595 if (copy_from_user(kbuf
, buf
, count
))
598 kbuf
[count
- 1] = '\0';
599 tmp
= strchr(kbuf
, '=');
605 if (!strcmp(kbuf
, "partition_entitled_capacity")) {
607 *new_entitled_ptr
= (u64
) simple_strtoul(tmp
, &endp
, 10);
611 retval
= update_ppp(new_entitled_ptr
, NULL
);
612 } else if (!strcmp(kbuf
, "capacity_weight")) {
614 *new_weight_ptr
= (u8
) simple_strtoul(tmp
, &endp
, 10);
618 retval
= update_ppp(NULL
, new_weight_ptr
);
619 } else if (!strcmp(kbuf
, "entitled_memory")) {
621 *new_entitled_ptr
= (u64
) simple_strtoul(tmp
, &endp
, 10);
625 retval
= update_mpp(new_entitled_ptr
, NULL
);
626 } else if (!strcmp(kbuf
, "entitled_memory_weight")) {
628 *new_weight_ptr
= (u8
) simple_strtoul(tmp
, &endp
, 10);
632 retval
= update_mpp(NULL
, new_weight_ptr
);
636 if (retval
== H_SUCCESS
|| retval
== H_CONSTRAINED
) {
638 } else if (retval
== H_BUSY
) {
640 } else if (retval
== H_HARDWARE
) {
642 } else if (retval
== H_PARAMETER
) {
649 #else /* CONFIG_PPC_PSERIES */
651 static int pseries_lparcfg_data(struct seq_file
*m
, void *v
)
656 static ssize_t
lparcfg_write(struct file
*file
, const char __user
* buf
,
657 size_t count
, loff_t
* off
)
662 #endif /* CONFIG_PPC_PSERIES */
664 static int lparcfg_data(struct seq_file
*m
, void *v
)
666 struct device_node
*rootdn
;
667 const char *model
= "";
668 const char *system_id
= "";
670 const unsigned int *lp_index_ptr
;
671 unsigned int lp_index
= 0;
673 seq_printf(m
, "%s %s \n", MODULE_NAME
, MODULE_VERS
);
675 rootdn
= of_find_node_by_path("/");
677 tmp
= of_get_property(rootdn
, "model", NULL
);
680 /* Skip "IBM," - see platforms/iseries/dt.c */
681 if (firmware_has_feature(FW_FEATURE_ISERIES
))
684 tmp
= of_get_property(rootdn
, "system-id", NULL
);
687 /* Skip "IBM," - see platforms/iseries/dt.c */
688 if (firmware_has_feature(FW_FEATURE_ISERIES
))
691 lp_index_ptr
= of_get_property(rootdn
, "ibm,partition-no",
694 lp_index
= *lp_index_ptr
;
697 seq_printf(m
, "serial_number=%s\n", system_id
);
698 seq_printf(m
, "system_type=%s\n", model
);
699 seq_printf(m
, "partition_id=%d\n", (int)lp_index
);
701 if (firmware_has_feature(FW_FEATURE_ISERIES
))
702 return iseries_lparcfg_data(m
, v
);
703 return pseries_lparcfg_data(m
, v
);
706 static int lparcfg_open(struct inode
*inode
, struct file
*file
)
708 return single_open(file
, lparcfg_data
, NULL
);
711 static const struct file_operations lparcfg_fops
= {
712 .owner
= THIS_MODULE
,
714 .write
= lparcfg_write
,
715 .open
= lparcfg_open
,
716 .release
= single_release
,
719 static int __init
lparcfg_init(void)
721 struct proc_dir_entry
*ent
;
722 mode_t mode
= S_IRUSR
| S_IRGRP
| S_IROTH
;
724 /* Allow writing if we have FW_FEATURE_SPLPAR */
725 if (firmware_has_feature(FW_FEATURE_SPLPAR
) &&
726 !firmware_has_feature(FW_FEATURE_ISERIES
))
729 ent
= proc_create("ppc64/lparcfg", mode
, NULL
, &lparcfg_fops
);
731 printk(KERN_ERR
"Failed to create ppc64/lparcfg\n");
735 proc_ppc64_lparcfg
= ent
;
739 static void __exit
lparcfg_cleanup(void)
741 if (proc_ppc64_lparcfg
)
742 remove_proc_entry("lparcfg", proc_ppc64_lparcfg
->parent
);
745 module_init(lparcfg_init
);
746 module_exit(lparcfg_cleanup
);
747 MODULE_DESCRIPTION("Interface for LPAR configuration data");
748 MODULE_AUTHOR("Dave Engebretsen");
749 MODULE_LICENSE("GPL");