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Commit | Line | Data |
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ab519a01 NF |
1 | /* |
2 | * Support for dynamic reconfiguration for PCI, Memory, and CPU | |
3 | * Hotplug and Dynamic Logical Partitioning on RPA platforms. | |
4 | * | |
5 | * Copyright (C) 2009 Nathan Fontenot | |
6 | * Copyright (C) 2009 IBM Corporation | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License version | |
10 | * 2 as published by the Free Software Foundation. | |
11 | */ | |
12 | ||
999e2dad NF |
13 | #define pr_fmt(fmt) "dlpar: " fmt |
14 | ||
ab519a01 | 15 | #include <linux/kernel.h> |
ab519a01 | 16 | #include <linux/notifier.h> |
ab519a01 NF |
17 | #include <linux/spinlock.h> |
18 | #include <linux/cpu.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
1cf3d8b3 | 20 | #include <linux/of.h> |
06bacefc AS |
21 | |
22 | #include "of_helpers.h" | |
1217d34b | 23 | #include "pseries.h" |
ab519a01 NF |
24 | |
25 | #include <asm/prom.h> | |
26 | #include <asm/machdep.h> | |
7c0f6ba6 | 27 | #include <linux/uaccess.h> |
ab519a01 | 28 | #include <asm/rtas.h> |
ab519a01 | 29 | |
7c98bd72 | 30 | static struct workqueue_struct *pseries_hp_wq; |
9054619e JA |
31 | |
32 | struct pseries_hp_work { | |
33 | struct work_struct work; | |
34 | struct pseries_hp_errorlog *errlog; | |
35 | struct completion *hp_completion; | |
36 | int *rc; | |
37 | }; | |
38 | ||
ab519a01 | 39 | struct cc_workarea { |
d6f1e7ab BR |
40 | __be32 drc_index; |
41 | __be32 zero; | |
42 | __be32 name_offset; | |
43 | __be32 prop_length; | |
44 | __be32 prop_offset; | |
ab519a01 NF |
45 | }; |
46 | ||
20648974 | 47 | void dlpar_free_cc_property(struct property *prop) |
ab519a01 NF |
48 | { |
49 | kfree(prop->name); | |
50 | kfree(prop->value); | |
51 | kfree(prop); | |
52 | } | |
53 | ||
54 | static struct property *dlpar_parse_cc_property(struct cc_workarea *ccwa) | |
55 | { | |
56 | struct property *prop; | |
57 | char *name; | |
58 | char *value; | |
59 | ||
60 | prop = kzalloc(sizeof(*prop), GFP_KERNEL); | |
61 | if (!prop) | |
62 | return NULL; | |
63 | ||
d6f1e7ab | 64 | name = (char *)ccwa + be32_to_cpu(ccwa->name_offset); |
ab519a01 NF |
65 | prop->name = kstrdup(name, GFP_KERNEL); |
66 | ||
d6f1e7ab BR |
67 | prop->length = be32_to_cpu(ccwa->prop_length); |
68 | value = (char *)ccwa + be32_to_cpu(ccwa->prop_offset); | |
e72ed6b5 | 69 | prop->value = kmemdup(value, prop->length, GFP_KERNEL); |
ab519a01 NF |
70 | if (!prop->value) { |
71 | dlpar_free_cc_property(prop); | |
72 | return NULL; | |
73 | } | |
74 | ||
ab519a01 NF |
75 | return prop; |
76 | } | |
77 | ||
8d5ff320 TD |
78 | static struct device_node *dlpar_parse_cc_node(struct cc_workarea *ccwa, |
79 | const char *path) | |
ab519a01 NF |
80 | { |
81 | struct device_node *dn; | |
82 | char *name; | |
83 | ||
8d5ff320 TD |
84 | /* If parent node path is "/" advance path to NULL terminator to |
85 | * prevent double leading slashs in full_name. | |
86 | */ | |
87 | if (!path[1]) | |
88 | path++; | |
89 | ||
ab519a01 NF |
90 | dn = kzalloc(sizeof(*dn), GFP_KERNEL); |
91 | if (!dn) | |
92 | return NULL; | |
93 | ||
d6f1e7ab | 94 | name = (char *)ccwa + be32_to_cpu(ccwa->name_offset); |
8d5ff320 | 95 | dn->full_name = kasprintf(GFP_KERNEL, "%s/%s", path, name); |
ab519a01 NF |
96 | if (!dn->full_name) { |
97 | kfree(dn); | |
98 | return NULL; | |
99 | } | |
100 | ||
1578cb76 | 101 | of_node_set_flag(dn, OF_DYNAMIC); |
97a9a717 | 102 | of_node_init(dn); |
1578cb76 | 103 | |
ab519a01 NF |
104 | return dn; |
105 | } | |
106 | ||
107 | static void dlpar_free_one_cc_node(struct device_node *dn) | |
108 | { | |
109 | struct property *prop; | |
110 | ||
111 | while (dn->properties) { | |
112 | prop = dn->properties; | |
113 | dn->properties = prop->next; | |
114 | dlpar_free_cc_property(prop); | |
115 | } | |
116 | ||
117 | kfree(dn->full_name); | |
118 | kfree(dn); | |
119 | } | |
120 | ||
20648974 | 121 | void dlpar_free_cc_nodes(struct device_node *dn) |
ab519a01 NF |
122 | { |
123 | if (dn->child) | |
124 | dlpar_free_cc_nodes(dn->child); | |
125 | ||
126 | if (dn->sibling) | |
127 | dlpar_free_cc_nodes(dn->sibling); | |
128 | ||
129 | dlpar_free_one_cc_node(dn); | |
130 | } | |
131 | ||
9c740025 | 132 | #define COMPLETE 0 |
ab519a01 NF |
133 | #define NEXT_SIBLING 1 |
134 | #define NEXT_CHILD 2 | |
135 | #define NEXT_PROPERTY 3 | |
136 | #define PREV_PARENT 4 | |
137 | #define MORE_MEMORY 5 | |
138 | #define CALL_AGAIN -2 | |
139 | #define ERR_CFG_USE -9003 | |
140 | ||
d6f1e7ab | 141 | struct device_node *dlpar_configure_connector(__be32 drc_index, |
8d5ff320 | 142 | struct device_node *parent) |
ab519a01 NF |
143 | { |
144 | struct device_node *dn; | |
145 | struct device_node *first_dn = NULL; | |
146 | struct device_node *last_dn = NULL; | |
147 | struct property *property; | |
148 | struct property *last_property = NULL; | |
149 | struct cc_workarea *ccwa; | |
93f68f1e | 150 | char *data_buf; |
8d5ff320 | 151 | const char *parent_path = parent->full_name; |
ab519a01 | 152 | int cc_token; |
93f68f1e | 153 | int rc = -1; |
ab519a01 NF |
154 | |
155 | cc_token = rtas_token("ibm,configure-connector"); | |
156 | if (cc_token == RTAS_UNKNOWN_SERVICE) | |
157 | return NULL; | |
158 | ||
93f68f1e NF |
159 | data_buf = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL); |
160 | if (!data_buf) | |
161 | return NULL; | |
162 | ||
163 | ccwa = (struct cc_workarea *)&data_buf[0]; | |
ab519a01 NF |
164 | ccwa->drc_index = drc_index; |
165 | ccwa->zero = 0; | |
166 | ||
93f68f1e NF |
167 | do { |
168 | /* Since we release the rtas_data_buf lock between configure | |
169 | * connector calls we want to re-populate the rtas_data_buffer | |
170 | * with the contents of the previous call. | |
171 | */ | |
172 | spin_lock(&rtas_data_buf_lock); | |
173 | ||
174 | memcpy(rtas_data_buf, data_buf, RTAS_DATA_BUF_SIZE); | |
175 | rc = rtas_call(cc_token, 2, 1, NULL, rtas_data_buf, NULL); | |
176 | memcpy(data_buf, rtas_data_buf, RTAS_DATA_BUF_SIZE); | |
177 | ||
178 | spin_unlock(&rtas_data_buf_lock); | |
179 | ||
ab519a01 | 180 | switch (rc) { |
9c740025 AB |
181 | case COMPLETE: |
182 | break; | |
183 | ||
ab519a01 | 184 | case NEXT_SIBLING: |
8d5ff320 | 185 | dn = dlpar_parse_cc_node(ccwa, parent_path); |
ab519a01 NF |
186 | if (!dn) |
187 | goto cc_error; | |
188 | ||
189 | dn->parent = last_dn->parent; | |
190 | last_dn->sibling = dn; | |
191 | last_dn = dn; | |
192 | break; | |
193 | ||
194 | case NEXT_CHILD: | |
8d5ff320 TD |
195 | if (first_dn) |
196 | parent_path = last_dn->full_name; | |
197 | ||
198 | dn = dlpar_parse_cc_node(ccwa, parent_path); | |
ab519a01 NF |
199 | if (!dn) |
200 | goto cc_error; | |
201 | ||
8d5ff320 TD |
202 | if (!first_dn) { |
203 | dn->parent = parent; | |
ab519a01 | 204 | first_dn = dn; |
8d5ff320 | 205 | } else { |
ab519a01 NF |
206 | dn->parent = last_dn; |
207 | if (last_dn) | |
208 | last_dn->child = dn; | |
209 | } | |
210 | ||
211 | last_dn = dn; | |
212 | break; | |
213 | ||
214 | case NEXT_PROPERTY: | |
215 | property = dlpar_parse_cc_property(ccwa); | |
216 | if (!property) | |
217 | goto cc_error; | |
218 | ||
219 | if (!last_dn->properties) | |
220 | last_dn->properties = property; | |
221 | else | |
222 | last_property->next = property; | |
223 | ||
224 | last_property = property; | |
225 | break; | |
226 | ||
227 | case PREV_PARENT: | |
228 | last_dn = last_dn->parent; | |
8d5ff320 | 229 | parent_path = last_dn->parent->full_name; |
ab519a01 NF |
230 | break; |
231 | ||
232 | case CALL_AGAIN: | |
233 | break; | |
234 | ||
235 | case MORE_MEMORY: | |
236 | case ERR_CFG_USE: | |
237 | default: | |
238 | printk(KERN_ERR "Unexpected Error (%d) " | |
239 | "returned from configure-connector\n", rc); | |
240 | goto cc_error; | |
241 | } | |
93f68f1e | 242 | } while (rc); |
ab519a01 | 243 | |
93f68f1e NF |
244 | cc_error: |
245 | kfree(data_buf); | |
246 | ||
247 | if (rc) { | |
248 | if (first_dn) | |
249 | dlpar_free_cc_nodes(first_dn); | |
250 | ||
251 | return NULL; | |
ab519a01 NF |
252 | } |
253 | ||
ab519a01 | 254 | return first_dn; |
ab519a01 NF |
255 | } |
256 | ||
ab519a01 NF |
257 | int dlpar_attach_node(struct device_node *dn) |
258 | { | |
ab519a01 NF |
259 | int rc; |
260 | ||
06bacefc AS |
261 | dn->parent = pseries_of_derive_parent(dn->full_name); |
262 | if (IS_ERR(dn->parent)) | |
263 | return PTR_ERR(dn->parent); | |
ab519a01 | 264 | |
1cf3d8b3 | 265 | rc = of_attach_node(dn); |
3aef19f0 | 266 | if (rc) { |
ab519a01 NF |
267 | printk(KERN_ERR "Failed to add device node %s\n", |
268 | dn->full_name); | |
3aef19f0 | 269 | return rc; |
ab519a01 NF |
270 | } |
271 | ||
ab519a01 NF |
272 | of_node_put(dn->parent); |
273 | return 0; | |
274 | } | |
275 | ||
276 | int dlpar_detach_node(struct device_node *dn) | |
277 | { | |
5935ff43 | 278 | struct device_node *child; |
1cf3d8b3 | 279 | int rc; |
ab519a01 | 280 | |
5935ff43 TD |
281 | child = of_get_next_child(dn, NULL); |
282 | while (child) { | |
283 | dlpar_detach_node(child); | |
284 | child = of_get_next_child(dn, child); | |
285 | } | |
286 | ||
1cf3d8b3 NF |
287 | rc = of_detach_node(dn); |
288 | if (rc) | |
289 | return rc; | |
290 | ||
291 | of_node_put(dn); /* Must decrement the refcount */ | |
ab519a01 NF |
292 | return 0; |
293 | } | |
294 | ||
295 | #define DR_ENTITY_SENSE 9003 | |
296 | #define DR_ENTITY_PRESENT 1 | |
297 | #define DR_ENTITY_UNUSABLE 2 | |
298 | #define ALLOCATION_STATE 9003 | |
299 | #define ALLOC_UNUSABLE 0 | |
300 | #define ALLOC_USABLE 1 | |
301 | #define ISOLATION_STATE 9001 | |
302 | #define ISOLATE 0 | |
303 | #define UNISOLATE 1 | |
304 | ||
305 | int dlpar_acquire_drc(u32 drc_index) | |
306 | { | |
307 | int dr_status, rc; | |
308 | ||
309 | rc = rtas_call(rtas_token("get-sensor-state"), 2, 2, &dr_status, | |
310 | DR_ENTITY_SENSE, drc_index); | |
311 | if (rc || dr_status != DR_ENTITY_UNUSABLE) | |
312 | return -1; | |
313 | ||
314 | rc = rtas_set_indicator(ALLOCATION_STATE, drc_index, ALLOC_USABLE); | |
315 | if (rc) | |
316 | return rc; | |
317 | ||
318 | rc = rtas_set_indicator(ISOLATION_STATE, drc_index, UNISOLATE); | |
319 | if (rc) { | |
320 | rtas_set_indicator(ALLOCATION_STATE, drc_index, ALLOC_UNUSABLE); | |
321 | return rc; | |
322 | } | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
327 | int dlpar_release_drc(u32 drc_index) | |
328 | { | |
329 | int dr_status, rc; | |
330 | ||
331 | rc = rtas_call(rtas_token("get-sensor-state"), 2, 2, &dr_status, | |
332 | DR_ENTITY_SENSE, drc_index); | |
333 | if (rc || dr_status != DR_ENTITY_PRESENT) | |
334 | return -1; | |
335 | ||
336 | rc = rtas_set_indicator(ISOLATION_STATE, drc_index, ISOLATE); | |
337 | if (rc) | |
338 | return rc; | |
339 | ||
340 | rc = rtas_set_indicator(ALLOCATION_STATE, drc_index, ALLOC_UNUSABLE); | |
341 | if (rc) { | |
342 | rtas_set_indicator(ISOLATION_STATE, drc_index, UNISOLATE); | |
343 | return rc; | |
344 | } | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
999e2dad NF |
349 | static int handle_dlpar_errorlog(struct pseries_hp_errorlog *hp_elog) |
350 | { | |
351 | int rc; | |
352 | ||
353 | /* pseries error logs are in BE format, convert to cpu type */ | |
354 | switch (hp_elog->id_type) { | |
355 | case PSERIES_HP_ELOG_ID_DRC_COUNT: | |
356 | hp_elog->_drc_u.drc_count = | |
357 | be32_to_cpu(hp_elog->_drc_u.drc_count); | |
358 | break; | |
359 | case PSERIES_HP_ELOG_ID_DRC_INDEX: | |
360 | hp_elog->_drc_u.drc_index = | |
361 | be32_to_cpu(hp_elog->_drc_u.drc_index); | |
362 | } | |
363 | ||
364 | switch (hp_elog->resource) { | |
365 | case PSERIES_HP_ELOG_RESOURCE_MEM: | |
366 | rc = dlpar_memory(hp_elog); | |
367 | break; | |
e9d764f8 NF |
368 | case PSERIES_HP_ELOG_RESOURCE_CPU: |
369 | rc = dlpar_cpu(hp_elog); | |
370 | break; | |
999e2dad NF |
371 | default: |
372 | pr_warn_ratelimited("Invalid resource (%d) specified\n", | |
373 | hp_elog->resource); | |
374 | rc = -EINVAL; | |
375 | } | |
376 | ||
377 | return rc; | |
378 | } | |
379 | ||
7c98bd72 | 380 | static void pseries_hp_work_fn(struct work_struct *work) |
9054619e JA |
381 | { |
382 | struct pseries_hp_work *hp_work = | |
383 | container_of(work, struct pseries_hp_work, work); | |
384 | ||
385 | if (hp_work->rc) | |
386 | *(hp_work->rc) = handle_dlpar_errorlog(hp_work->errlog); | |
387 | else | |
388 | handle_dlpar_errorlog(hp_work->errlog); | |
389 | ||
390 | if (hp_work->hp_completion) | |
391 | complete(hp_work->hp_completion); | |
392 | ||
393 | kfree(hp_work->errlog); | |
394 | kfree((void *)work); | |
395 | } | |
396 | ||
397 | void queue_hotplug_event(struct pseries_hp_errorlog *hp_errlog, | |
398 | struct completion *hotplug_done, int *rc) | |
399 | { | |
400 | struct pseries_hp_work *work; | |
401 | struct pseries_hp_errorlog *hp_errlog_copy; | |
402 | ||
403 | hp_errlog_copy = kmalloc(sizeof(struct pseries_hp_errorlog), | |
404 | GFP_KERNEL); | |
405 | memcpy(hp_errlog_copy, hp_errlog, sizeof(struct pseries_hp_errorlog)); | |
406 | ||
407 | work = kmalloc(sizeof(struct pseries_hp_work), GFP_KERNEL); | |
408 | if (work) { | |
409 | INIT_WORK((struct work_struct *)work, pseries_hp_work_fn); | |
410 | work->errlog = hp_errlog_copy; | |
411 | work->hp_completion = hotplug_done; | |
412 | work->rc = rc; | |
413 | queue_work(pseries_hp_wq, (struct work_struct *)work); | |
414 | } else { | |
415 | *rc = -ENOMEM; | |
90ce3514 | 416 | kfree(hp_errlog_copy); |
9054619e JA |
417 | complete(hotplug_done); |
418 | } | |
419 | } | |
420 | ||
25b587fb | 421 | static int dlpar_parse_resource(char **cmd, struct pseries_hp_errorlog *hp_elog) |
999e2dad | 422 | { |
25b587fb | 423 | char *arg; |
999e2dad | 424 | |
25b587fb NF |
425 | arg = strsep(cmd, " "); |
426 | if (!arg) | |
427 | return -EINVAL; | |
999e2dad | 428 | |
25b587fb | 429 | if (sysfs_streq(arg, "memory")) { |
999e2dad | 430 | hp_elog->resource = PSERIES_HP_ELOG_RESOURCE_MEM; |
25b587fb | 431 | } else if (sysfs_streq(arg, "cpu")) { |
e9d764f8 | 432 | hp_elog->resource = PSERIES_HP_ELOG_RESOURCE_CPU; |
999e2dad | 433 | } else { |
25b587fb NF |
434 | pr_err("Invalid resource specified.\n"); |
435 | return -EINVAL; | |
999e2dad NF |
436 | } |
437 | ||
25b587fb NF |
438 | return 0; |
439 | } | |
440 | ||
441 | static int dlpar_parse_action(char **cmd, struct pseries_hp_errorlog *hp_elog) | |
442 | { | |
443 | char *arg; | |
444 | ||
445 | arg = strsep(cmd, " "); | |
446 | if (!arg) | |
447 | return -EINVAL; | |
448 | ||
449 | if (sysfs_streq(arg, "add")) { | |
999e2dad | 450 | hp_elog->action = PSERIES_HP_ELOG_ACTION_ADD; |
25b587fb | 451 | } else if (sysfs_streq(arg, "remove")) { |
999e2dad | 452 | hp_elog->action = PSERIES_HP_ELOG_ACTION_REMOVE; |
999e2dad | 453 | } else { |
25b587fb NF |
454 | pr_err("Invalid action specified.\n"); |
455 | return -EINVAL; | |
999e2dad NF |
456 | } |
457 | ||
25b587fb NF |
458 | return 0; |
459 | } | |
999e2dad | 460 | |
25b587fb NF |
461 | static int dlpar_parse_id_type(char **cmd, struct pseries_hp_errorlog *hp_elog) |
462 | { | |
463 | char *arg; | |
464 | u32 count, index; | |
465 | ||
466 | arg = strsep(cmd, " "); | |
467 | if (!arg) | |
468 | return -EINVAL; | |
469 | ||
470 | if (sysfs_streq(arg, "index")) { | |
999e2dad | 471 | hp_elog->id_type = PSERIES_HP_ELOG_ID_DRC_INDEX; |
25b587fb NF |
472 | arg = strsep(cmd, " "); |
473 | if (!arg) { | |
474 | pr_err("No DRC Index specified.\n"); | |
475 | return -EINVAL; | |
476 | } | |
477 | ||
999e2dad | 478 | if (kstrtou32(arg, 0, &index)) { |
25b587fb NF |
479 | pr_err("Invalid DRC Index specified.\n"); |
480 | return -EINVAL; | |
999e2dad NF |
481 | } |
482 | ||
483 | hp_elog->_drc_u.drc_index = cpu_to_be32(index); | |
25b587fb | 484 | } else if (sysfs_streq(arg, "count")) { |
999e2dad | 485 | hp_elog->id_type = PSERIES_HP_ELOG_ID_DRC_COUNT; |
25b587fb NF |
486 | arg = strsep(cmd, " "); |
487 | if (!arg) { | |
488 | pr_err("No DRC count specified.\n"); | |
489 | return -EINVAL; | |
490 | } | |
491 | ||
999e2dad | 492 | if (kstrtou32(arg, 0, &count)) { |
25b587fb NF |
493 | pr_err("Invalid DRC count specified.\n"); |
494 | return -EINVAL; | |
999e2dad NF |
495 | } |
496 | ||
497 | hp_elog->_drc_u.drc_count = cpu_to_be32(count); | |
498 | } else { | |
25b587fb NF |
499 | pr_err("Invalid id_type specified.\n"); |
500 | return -EINVAL; | |
501 | } | |
502 | ||
503 | return 0; | |
504 | } | |
505 | ||
506 | static ssize_t dlpar_store(struct class *class, struct class_attribute *attr, | |
507 | const char *buf, size_t count) | |
508 | { | |
509 | struct pseries_hp_errorlog *hp_elog; | |
510 | struct completion hotplug_done; | |
511 | char *argbuf; | |
512 | char *args; | |
513 | int rc; | |
514 | ||
515 | args = argbuf = kstrdup(buf, GFP_KERNEL); | |
516 | hp_elog = kzalloc(sizeof(*hp_elog), GFP_KERNEL); | |
517 | if (!hp_elog || !argbuf) { | |
518 | pr_info("Could not allocate resources for DLPAR operation\n"); | |
519 | kfree(argbuf); | |
520 | kfree(hp_elog); | |
521 | return -ENOMEM; | |
999e2dad NF |
522 | } |
523 | ||
25b587fb NF |
524 | /* |
525 | * Parse out the request from the user, this will be in the form: | |
526 | * <resource> <action> <id_type> <id> | |
527 | */ | |
528 | rc = dlpar_parse_resource(&args, hp_elog); | |
529 | if (rc) | |
530 | goto dlpar_store_out; | |
531 | ||
532 | rc = dlpar_parse_action(&args, hp_elog); | |
533 | if (rc) | |
534 | goto dlpar_store_out; | |
535 | ||
536 | rc = dlpar_parse_id_type(&args, hp_elog); | |
537 | if (rc) | |
538 | goto dlpar_store_out; | |
539 | ||
1dc75956 JA |
540 | init_completion(&hotplug_done); |
541 | queue_hotplug_event(hp_elog, &hotplug_done, &rc); | |
542 | wait_for_completion(&hotplug_done); | |
999e2dad NF |
543 | |
544 | dlpar_store_out: | |
25b587fb | 545 | kfree(argbuf); |
999e2dad | 546 | kfree(hp_elog); |
25b587fb NF |
547 | |
548 | if (rc) | |
549 | pr_err("Could not handle DLPAR request \"%s\"\n", buf); | |
550 | ||
999e2dad NF |
551 | return rc ? rc : count; |
552 | } | |
553 | ||
673bc435 NF |
554 | static ssize_t dlpar_show(struct class *class, struct class_attribute *attr, |
555 | char *buf) | |
556 | { | |
557 | return sprintf(buf, "%s\n", "memory,cpu"); | |
558 | } | |
559 | ||
560 | static CLASS_ATTR(dlpar, S_IWUSR | S_IRUSR, dlpar_show, dlpar_store); | |
999e2dad | 561 | |
1a8061c4 NF |
562 | static int __init pseries_dlpar_init(void) |
563 | { | |
9054619e JA |
564 | pseries_hp_wq = alloc_workqueue("pseries hotplug workqueue", |
565 | WQ_UNBOUND, 1); | |
183deeea | 566 | return sysfs_create_file(kernel_kobj, &class_attr_dlpar.attr); |
1a8061c4 NF |
567 | } |
568 | machine_device_initcall(pseries, pseries_dlpar_init); | |
569 |