Commit | Line | Data |
---|---|---|
89b831ef | 1 | /* |
95268664 | 2 | * (c) 2005, 2006 Advanced Micro Devices, Inc. |
89b831ef JS |
3 | * Your use of this code is subject to the terms and conditions of the |
4 | * GNU general public license version 2. See "COPYING" or | |
5 | * http://www.gnu.org/licenses/gpl.html | |
6 | * | |
7 | * Written by Jacob Shin - AMD, Inc. | |
8 | * | |
9 | * Support : jacob.shin@amd.com | |
10 | * | |
95268664 JS |
11 | * April 2006 |
12 | * - added support for AMD Family 0x10 processors | |
89b831ef | 13 | * |
95268664 | 14 | * All MC4_MISCi registers are shared between multi-cores |
89b831ef JS |
15 | */ |
16 | ||
17 | #include <linux/cpu.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/interrupt.h> | |
21 | #include <linux/kobject.h> | |
22 | #include <linux/notifier.h> | |
23 | #include <linux/sched.h> | |
24 | #include <linux/smp.h> | |
25 | #include <linux/sysdev.h> | |
26 | #include <linux/sysfs.h> | |
27 | #include <asm/apic.h> | |
28 | #include <asm/mce.h> | |
29 | #include <asm/msr.h> | |
30 | #include <asm/percpu.h> | |
95833c83 | 31 | #include <asm/idle.h> |
89b831ef | 32 | |
2903ee85 JS |
33 | #define PFX "mce_threshold: " |
34 | #define VERSION "version 1.1.1" | |
35 | #define NR_BANKS 6 | |
36 | #define NR_BLOCKS 9 | |
37 | #define THRESHOLD_MAX 0xFFF | |
38 | #define INT_TYPE_APIC 0x00020000 | |
39 | #define MASK_VALID_HI 0x80000000 | |
24ce0e96 JB |
40 | #define MASK_CNTP_HI 0x40000000 |
41 | #define MASK_LOCKED_HI 0x20000000 | |
2903ee85 JS |
42 | #define MASK_LVTOFF_HI 0x00F00000 |
43 | #define MASK_COUNT_EN_HI 0x00080000 | |
44 | #define MASK_INT_TYPE_HI 0x00060000 | |
45 | #define MASK_OVERFLOW_HI 0x00010000 | |
89b831ef | 46 | #define MASK_ERR_COUNT_HI 0x00000FFF |
95268664 JS |
47 | #define MASK_BLKPTR_LO 0xFF000000 |
48 | #define MCG_XBLK_ADDR 0xC0000400 | |
89b831ef | 49 | |
95268664 JS |
50 | struct threshold_block { |
51 | unsigned int block; | |
52 | unsigned int bank; | |
89b831ef | 53 | unsigned int cpu; |
95268664 JS |
54 | u32 address; |
55 | u16 interrupt_enable; | |
89b831ef JS |
56 | u16 threshold_limit; |
57 | struct kobject kobj; | |
95268664 | 58 | struct list_head miscj; |
89b831ef JS |
59 | }; |
60 | ||
95268664 JS |
61 | /* defaults used early on boot */ |
62 | static struct threshold_block threshold_defaults = { | |
89b831ef JS |
63 | .interrupt_enable = 0, |
64 | .threshold_limit = THRESHOLD_MAX, | |
65 | }; | |
66 | ||
95268664 | 67 | struct threshold_bank { |
a521cf20 | 68 | struct kobject *kobj; |
95268664 | 69 | struct threshold_block *blocks; |
a1c33bbe | 70 | cpumask_var_t cpus; |
95268664 JS |
71 | }; |
72 | static DEFINE_PER_CPU(struct threshold_bank *, threshold_banks[NR_BANKS]); | |
73 | ||
89b831ef JS |
74 | #ifdef CONFIG_SMP |
75 | static unsigned char shared_bank[NR_BANKS] = { | |
76 | 0, 0, 0, 0, 1 | |
77 | }; | |
78 | #endif | |
79 | ||
80 | static DEFINE_PER_CPU(unsigned char, bank_map); /* see which banks are on */ | |
81 | ||
b2762686 AK |
82 | static void amd_threshold_interrupt(void); |
83 | ||
89b831ef JS |
84 | /* |
85 | * CPU Initialization | |
86 | */ | |
87 | ||
4cd4601d MT |
88 | struct thresh_restart { |
89 | struct threshold_block *b; | |
90 | int reset; | |
91 | u16 old_limit; | |
92 | }; | |
93 | ||
89b831ef | 94 | /* must be called with correct cpu affinity */ |
4cd4601d | 95 | static long threshold_restart_bank(void *_tr) |
89b831ef | 96 | { |
4cd4601d | 97 | struct thresh_restart *tr = _tr; |
89b831ef JS |
98 | u32 mci_misc_hi, mci_misc_lo; |
99 | ||
4cd4601d | 100 | rdmsr(tr->b->address, mci_misc_lo, mci_misc_hi); |
89b831ef | 101 | |
4cd4601d MT |
102 | if (tr->b->threshold_limit < (mci_misc_hi & THRESHOLD_MAX)) |
103 | tr->reset = 1; /* limit cannot be lower than err count */ | |
89b831ef | 104 | |
4cd4601d | 105 | if (tr->reset) { /* reset err count and overflow bit */ |
89b831ef JS |
106 | mci_misc_hi = |
107 | (mci_misc_hi & ~(MASK_ERR_COUNT_HI | MASK_OVERFLOW_HI)) | | |
4cd4601d MT |
108 | (THRESHOLD_MAX - tr->b->threshold_limit); |
109 | } else if (tr->old_limit) { /* change limit w/o reset */ | |
89b831ef | 110 | int new_count = (mci_misc_hi & THRESHOLD_MAX) + |
4cd4601d | 111 | (tr->old_limit - tr->b->threshold_limit); |
89b831ef JS |
112 | mci_misc_hi = (mci_misc_hi & ~MASK_ERR_COUNT_HI) | |
113 | (new_count & THRESHOLD_MAX); | |
114 | } | |
115 | ||
4cd4601d | 116 | tr->b->interrupt_enable ? |
89b831ef JS |
117 | (mci_misc_hi = (mci_misc_hi & ~MASK_INT_TYPE_HI) | INT_TYPE_APIC) : |
118 | (mci_misc_hi &= ~MASK_INT_TYPE_HI); | |
119 | ||
120 | mci_misc_hi |= MASK_COUNT_EN_HI; | |
4cd4601d MT |
121 | wrmsr(tr->b->address, mci_misc_lo, mci_misc_hi); |
122 | return 0; | |
89b831ef JS |
123 | } |
124 | ||
95268664 | 125 | /* cpu init entry point, called from mce.c with preempt off */ |
cc3ca220 | 126 | void mce_amd_feature_init(struct cpuinfo_x86 *c) |
89b831ef | 127 | { |
95268664 | 128 | unsigned int bank, block; |
89b831ef | 129 | unsigned int cpu = smp_processor_id(); |
7b83dae7 | 130 | u8 lvt_off; |
95268664 | 131 | u32 low = 0, high = 0, address = 0; |
4cd4601d | 132 | struct thresh_restart tr; |
89b831ef JS |
133 | |
134 | for (bank = 0; bank < NR_BANKS; ++bank) { | |
95268664 JS |
135 | for (block = 0; block < NR_BLOCKS; ++block) { |
136 | if (block == 0) | |
137 | address = MSR_IA32_MC0_MISC + bank * 4; | |
24ce0e96 JB |
138 | else if (block == 1) { |
139 | address = (low & MASK_BLKPTR_LO) >> 21; | |
140 | if (!address) | |
141 | break; | |
142 | address += MCG_XBLK_ADDR; | |
143 | } | |
95268664 JS |
144 | else |
145 | ++address; | |
146 | ||
147 | if (rdmsr_safe(address, &low, &high)) | |
24ce0e96 | 148 | break; |
95268664 JS |
149 | |
150 | if (!(high & MASK_VALID_HI)) { | |
151 | if (block) | |
152 | continue; | |
153 | else | |
154 | break; | |
155 | } | |
156 | ||
24ce0e96 JB |
157 | if (!(high & MASK_CNTP_HI) || |
158 | (high & MASK_LOCKED_HI)) | |
95268664 JS |
159 | continue; |
160 | ||
161 | if (!block) | |
162 | per_cpu(bank_map, cpu) |= (1 << bank); | |
89b831ef | 163 | #ifdef CONFIG_SMP |
95268664 JS |
164 | if (shared_bank[bank] && c->cpu_core_id) |
165 | break; | |
89b831ef | 166 | #endif |
7b83dae7 RR |
167 | lvt_off = setup_APIC_eilvt_mce(THRESHOLD_APIC_VECTOR, |
168 | APIC_EILVT_MSG_FIX, 0); | |
169 | ||
95268664 | 170 | high &= ~MASK_LVTOFF_HI; |
7b83dae7 | 171 | high |= lvt_off << 20; |
95268664 JS |
172 | wrmsr(address, low, high); |
173 | ||
95268664 | 174 | threshold_defaults.address = address; |
4cd4601d MT |
175 | tr.b = &threshold_defaults; |
176 | tr.reset = 0; | |
177 | tr.old_limit = 0; | |
178 | threshold_restart_bank(&tr); | |
b2762686 AK |
179 | |
180 | mce_threshold_vector = amd_threshold_interrupt; | |
95268664 | 181 | } |
89b831ef JS |
182 | } |
183 | } | |
184 | ||
185 | /* | |
186 | * APIC Interrupt Handler | |
187 | */ | |
188 | ||
189 | /* | |
190 | * threshold interrupt handler will service THRESHOLD_APIC_VECTOR. | |
191 | * the interrupt goes off when error_count reaches threshold_limit. | |
192 | * the handler will simply log mcelog w/ software defined bank number. | |
193 | */ | |
b2762686 | 194 | static void amd_threshold_interrupt(void) |
89b831ef | 195 | { |
95268664 | 196 | unsigned int bank, block; |
89b831ef | 197 | struct mce m; |
95268664 | 198 | u32 low = 0, high = 0, address = 0; |
89b831ef | 199 | |
b5f2fa4e | 200 | mce_setup(&m); |
89b831ef JS |
201 | |
202 | /* assume first bank caused it */ | |
203 | for (bank = 0; bank < NR_BANKS; ++bank) { | |
24ce0e96 JB |
204 | if (!(per_cpu(bank_map, m.cpu) & (1 << bank))) |
205 | continue; | |
95268664 JS |
206 | for (block = 0; block < NR_BLOCKS; ++block) { |
207 | if (block == 0) | |
208 | address = MSR_IA32_MC0_MISC + bank * 4; | |
24ce0e96 JB |
209 | else if (block == 1) { |
210 | address = (low & MASK_BLKPTR_LO) >> 21; | |
211 | if (!address) | |
212 | break; | |
213 | address += MCG_XBLK_ADDR; | |
214 | } | |
95268664 JS |
215 | else |
216 | ++address; | |
217 | ||
218 | if (rdmsr_safe(address, &low, &high)) | |
24ce0e96 | 219 | break; |
95268664 JS |
220 | |
221 | if (!(high & MASK_VALID_HI)) { | |
222 | if (block) | |
223 | continue; | |
224 | else | |
225 | break; | |
226 | } | |
227 | ||
24ce0e96 JB |
228 | if (!(high & MASK_CNTP_HI) || |
229 | (high & MASK_LOCKED_HI)) | |
95268664 JS |
230 | continue; |
231 | ||
a98f0dd3 AK |
232 | /* Log the machine check that caused the threshold |
233 | event. */ | |
ee031c31 AK |
234 | machine_check_poll(MCP_TIMESTAMP, |
235 | &__get_cpu_var(mce_poll_banks)); | |
a98f0dd3 | 236 | |
95268664 JS |
237 | if (high & MASK_OVERFLOW_HI) { |
238 | rdmsrl(address, m.misc); | |
239 | rdmsrl(MSR_IA32_MC0_STATUS + bank * 4, | |
240 | m.status); | |
241 | m.bank = K8_MCE_THRESHOLD_BASE | |
242 | + bank * NR_BLOCKS | |
243 | + block; | |
244 | mce_log(&m); | |
b2762686 | 245 | return; |
95268664 | 246 | } |
89b831ef JS |
247 | } |
248 | } | |
89b831ef JS |
249 | } |
250 | ||
251 | /* | |
252 | * Sysfs Interface | |
253 | */ | |
254 | ||
89b831ef | 255 | struct threshold_attr { |
2903ee85 | 256 | struct attribute attr; |
95268664 JS |
257 | ssize_t(*show) (struct threshold_block *, char *); |
258 | ssize_t(*store) (struct threshold_block *, const char *, size_t count); | |
89b831ef JS |
259 | }; |
260 | ||
2903ee85 JS |
261 | #define SHOW_FIELDS(name) \ |
262 | static ssize_t show_ ## name(struct threshold_block * b, char *buf) \ | |
263 | { \ | |
264 | return sprintf(buf, "%lx\n", (unsigned long) b->name); \ | |
265 | } | |
89b831ef JS |
266 | SHOW_FIELDS(interrupt_enable) |
267 | SHOW_FIELDS(threshold_limit) | |
268 | ||
95268664 | 269 | static ssize_t store_interrupt_enable(struct threshold_block *b, |
89b831ef JS |
270 | const char *buf, size_t count) |
271 | { | |
272 | char *end; | |
4cd4601d | 273 | struct thresh_restart tr; |
89b831ef JS |
274 | unsigned long new = simple_strtoul(buf, &end, 0); |
275 | if (end == buf) | |
276 | return -EINVAL; | |
277 | b->interrupt_enable = !!new; | |
278 | ||
4cd4601d MT |
279 | tr.b = b; |
280 | tr.reset = 0; | |
281 | tr.old_limit = 0; | |
282 | work_on_cpu(b->cpu, threshold_restart_bank, &tr); | |
89b831ef JS |
283 | |
284 | return end - buf; | |
285 | } | |
286 | ||
95268664 | 287 | static ssize_t store_threshold_limit(struct threshold_block *b, |
89b831ef JS |
288 | const char *buf, size_t count) |
289 | { | |
290 | char *end; | |
4cd4601d | 291 | struct thresh_restart tr; |
89b831ef JS |
292 | unsigned long new = simple_strtoul(buf, &end, 0); |
293 | if (end == buf) | |
294 | return -EINVAL; | |
295 | if (new > THRESHOLD_MAX) | |
296 | new = THRESHOLD_MAX; | |
297 | if (new < 1) | |
298 | new = 1; | |
4cd4601d | 299 | tr.old_limit = b->threshold_limit; |
89b831ef | 300 | b->threshold_limit = new; |
4cd4601d MT |
301 | tr.b = b; |
302 | tr.reset = 0; | |
89b831ef | 303 | |
4cd4601d | 304 | work_on_cpu(b->cpu, threshold_restart_bank, &tr); |
89b831ef JS |
305 | |
306 | return end - buf; | |
307 | } | |
308 | ||
4cd4601d | 309 | static long local_error_count(void *_b) |
89b831ef | 310 | { |
4cd4601d MT |
311 | struct threshold_block *b = _b; |
312 | u32 low, high; | |
313 | ||
95268664 | 314 | rdmsr(b->address, low, high); |
4cd4601d MT |
315 | return (high & 0xFFF) - (THRESHOLD_MAX - b->threshold_limit); |
316 | } | |
317 | ||
318 | static ssize_t show_error_count(struct threshold_block *b, char *buf) | |
319 | { | |
320 | return sprintf(buf, "%lx\n", work_on_cpu(b->cpu, local_error_count, b)); | |
89b831ef JS |
321 | } |
322 | ||
95268664 | 323 | static ssize_t store_error_count(struct threshold_block *b, |
89b831ef JS |
324 | const char *buf, size_t count) |
325 | { | |
4cd4601d MT |
326 | struct thresh_restart tr = { .b = b, .reset = 1, .old_limit = 0 }; |
327 | ||
328 | work_on_cpu(b->cpu, threshold_restart_bank, &tr); | |
89b831ef JS |
329 | return 1; |
330 | } | |
331 | ||
332 | #define THRESHOLD_ATTR(_name,_mode,_show,_store) { \ | |
333 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
334 | .show = _show, \ | |
335 | .store = _store, \ | |
336 | }; | |
337 | ||
2903ee85 JS |
338 | #define RW_ATTR(name) \ |
339 | static struct threshold_attr name = \ | |
89b831ef JS |
340 | THRESHOLD_ATTR(name, 0644, show_## name, store_## name) |
341 | ||
2903ee85 JS |
342 | RW_ATTR(interrupt_enable); |
343 | RW_ATTR(threshold_limit); | |
344 | RW_ATTR(error_count); | |
89b831ef JS |
345 | |
346 | static struct attribute *default_attrs[] = { | |
347 | &interrupt_enable.attr, | |
348 | &threshold_limit.attr, | |
349 | &error_count.attr, | |
350 | NULL | |
351 | }; | |
352 | ||
95268664 | 353 | #define to_block(k) container_of(k, struct threshold_block, kobj) |
2903ee85 | 354 | #define to_attr(a) container_of(a, struct threshold_attr, attr) |
89b831ef JS |
355 | |
356 | static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf) | |
357 | { | |
95268664 | 358 | struct threshold_block *b = to_block(kobj); |
89b831ef JS |
359 | struct threshold_attr *a = to_attr(attr); |
360 | ssize_t ret; | |
361 | ret = a->show ? a->show(b, buf) : -EIO; | |
362 | return ret; | |
363 | } | |
364 | ||
365 | static ssize_t store(struct kobject *kobj, struct attribute *attr, | |
366 | const char *buf, size_t count) | |
367 | { | |
95268664 | 368 | struct threshold_block *b = to_block(kobj); |
89b831ef JS |
369 | struct threshold_attr *a = to_attr(attr); |
370 | ssize_t ret; | |
371 | ret = a->store ? a->store(b, buf, count) : -EIO; | |
372 | return ret; | |
373 | } | |
374 | ||
375 | static struct sysfs_ops threshold_ops = { | |
376 | .show = show, | |
377 | .store = store, | |
378 | }; | |
379 | ||
380 | static struct kobj_type threshold_ktype = { | |
381 | .sysfs_ops = &threshold_ops, | |
382 | .default_attrs = default_attrs, | |
383 | }; | |
384 | ||
95268664 JS |
385 | static __cpuinit int allocate_threshold_blocks(unsigned int cpu, |
386 | unsigned int bank, | |
387 | unsigned int block, | |
388 | u32 address) | |
389 | { | |
390 | int err; | |
391 | u32 low, high; | |
392 | struct threshold_block *b = NULL; | |
393 | ||
394 | if ((bank >= NR_BANKS) || (block >= NR_BLOCKS)) | |
395 | return 0; | |
396 | ||
397 | if (rdmsr_safe(address, &low, &high)) | |
24ce0e96 | 398 | return 0; |
95268664 JS |
399 | |
400 | if (!(high & MASK_VALID_HI)) { | |
401 | if (block) | |
402 | goto recurse; | |
403 | else | |
404 | return 0; | |
405 | } | |
406 | ||
24ce0e96 JB |
407 | if (!(high & MASK_CNTP_HI) || |
408 | (high & MASK_LOCKED_HI)) | |
95268664 JS |
409 | goto recurse; |
410 | ||
411 | b = kzalloc(sizeof(struct threshold_block), GFP_KERNEL); | |
412 | if (!b) | |
413 | return -ENOMEM; | |
95268664 JS |
414 | |
415 | b->block = block; | |
416 | b->bank = bank; | |
417 | b->cpu = cpu; | |
418 | b->address = address; | |
419 | b->interrupt_enable = 0; | |
420 | b->threshold_limit = THRESHOLD_MAX; | |
421 | ||
422 | INIT_LIST_HEAD(&b->miscj); | |
423 | ||
424 | if (per_cpu(threshold_banks, cpu)[bank]->blocks) | |
425 | list_add(&b->miscj, | |
426 | &per_cpu(threshold_banks, cpu)[bank]->blocks->miscj); | |
427 | else | |
428 | per_cpu(threshold_banks, cpu)[bank]->blocks = b; | |
429 | ||
542eb75a GKH |
430 | err = kobject_init_and_add(&b->kobj, &threshold_ktype, |
431 | per_cpu(threshold_banks, cpu)[bank]->kobj, | |
432 | "misc%i", block); | |
95268664 JS |
433 | if (err) |
434 | goto out_free; | |
435 | recurse: | |
436 | if (!block) { | |
437 | address = (low & MASK_BLKPTR_LO) >> 21; | |
438 | if (!address) | |
439 | return 0; | |
440 | address += MCG_XBLK_ADDR; | |
441 | } else | |
442 | ++address; | |
443 | ||
444 | err = allocate_threshold_blocks(cpu, bank, ++block, address); | |
445 | if (err) | |
446 | goto out_free; | |
447 | ||
213eca7f GKH |
448 | if (b) |
449 | kobject_uevent(&b->kobj, KOBJ_ADD); | |
542eb75a | 450 | |
95268664 JS |
451 | return err; |
452 | ||
453 | out_free: | |
454 | if (b) { | |
38a382ae | 455 | kobject_put(&b->kobj); |
95268664 JS |
456 | kfree(b); |
457 | } | |
458 | return err; | |
459 | } | |
460 | ||
51d7a139 | 461 | static __cpuinit long local_allocate_threshold_blocks(void *_bank) |
4cd4601d MT |
462 | { |
463 | unsigned int *bank = _bank; | |
464 | ||
465 | return allocate_threshold_blocks(smp_processor_id(), *bank, 0, | |
466 | MSR_IA32_MC0_MISC + *bank * 4); | |
467 | } | |
468 | ||
89b831ef | 469 | /* symlinks sibling shared banks to first core. first core owns dir/files. */ |
95268664 | 470 | static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank) |
89b831ef | 471 | { |
95268664 | 472 | int i, err = 0; |
68209407 | 473 | struct threshold_bank *b = NULL; |
95268664 JS |
474 | char name[32]; |
475 | ||
476 | sprintf(name, "threshold_bank%i", bank); | |
89b831ef JS |
477 | |
478 | #ifdef CONFIG_SMP | |
92cb7612 | 479 | if (cpu_data(cpu).cpu_core_id && shared_bank[bank]) { /* symlink */ |
a1c33bbe | 480 | i = cpumask_first(&per_cpu(cpu_core_map, cpu)); |
95268664 JS |
481 | |
482 | /* first core not up yet */ | |
92cb7612 | 483 | if (cpu_data(i).cpu_core_id) |
95268664 JS |
484 | goto out; |
485 | ||
486 | /* already linked */ | |
487 | if (per_cpu(threshold_banks, cpu)[bank]) | |
488 | goto out; | |
489 | ||
490 | b = per_cpu(threshold_banks, i)[bank]; | |
89b831ef | 491 | |
89b831ef JS |
492 | if (!b) |
493 | goto out; | |
95268664 | 494 | |
fff2e89f | 495 | err = sysfs_create_link(&per_cpu(device_mce, cpu).kobj, |
a521cf20 | 496 | b->kobj, name); |
89b831ef JS |
497 | if (err) |
498 | goto out; | |
95268664 | 499 | |
a1c33bbe | 500 | cpumask_copy(b->cpus, &per_cpu(cpu_core_map, cpu)); |
89b831ef JS |
501 | per_cpu(threshold_banks, cpu)[bank] = b; |
502 | goto out; | |
503 | } | |
504 | #endif | |
505 | ||
95268664 | 506 | b = kzalloc(sizeof(struct threshold_bank), GFP_KERNEL); |
89b831ef JS |
507 | if (!b) { |
508 | err = -ENOMEM; | |
509 | goto out; | |
510 | } | |
a1c33bbe MT |
511 | if (!alloc_cpumask_var(&b->cpus, GFP_KERNEL)) { |
512 | kfree(b); | |
513 | err = -ENOMEM; | |
514 | goto out; | |
515 | } | |
89b831ef | 516 | |
a521cf20 GKH |
517 | b->kobj = kobject_create_and_add(name, &per_cpu(device_mce, cpu).kobj); |
518 | if (!b->kobj) | |
519 | goto out_free; | |
520 | ||
95268664 | 521 | #ifndef CONFIG_SMP |
a1c33bbe | 522 | cpumask_setall(b->cpus); |
95268664 | 523 | #else |
a1c33bbe | 524 | cpumask_copy(b->cpus, &per_cpu(cpu_core_map, cpu)); |
95268664 | 525 | #endif |
95268664 | 526 | |
89b831ef | 527 | per_cpu(threshold_banks, cpu)[bank] = b; |
95268664 | 528 | |
4cd4601d | 529 | err = work_on_cpu(cpu, local_allocate_threshold_blocks, &bank); |
95268664 JS |
530 | if (err) |
531 | goto out_free; | |
532 | ||
a1c33bbe | 533 | for_each_cpu(i, b->cpus) { |
95268664 JS |
534 | if (i == cpu) |
535 | continue; | |
536 | ||
537 | err = sysfs_create_link(&per_cpu(device_mce, i).kobj, | |
a521cf20 | 538 | b->kobj, name); |
95268664 JS |
539 | if (err) |
540 | goto out; | |
541 | ||
542 | per_cpu(threshold_banks, i)[bank] = b; | |
543 | } | |
544 | ||
545 | goto out; | |
546 | ||
547 | out_free: | |
548 | per_cpu(threshold_banks, cpu)[bank] = NULL; | |
a1c33bbe | 549 | free_cpumask_var(b->cpus); |
95268664 | 550 | kfree(b); |
2903ee85 | 551 | out: |
89b831ef JS |
552 | return err; |
553 | } | |
554 | ||
555 | /* create dir/files for all valid threshold banks */ | |
556 | static __cpuinit int threshold_create_device(unsigned int cpu) | |
557 | { | |
2903ee85 | 558 | unsigned int bank; |
89b831ef JS |
559 | int err = 0; |
560 | ||
89b831ef | 561 | for (bank = 0; bank < NR_BANKS; ++bank) { |
5a96f4a5 | 562 | if (!(per_cpu(bank_map, cpu) & (1 << bank))) |
89b831ef JS |
563 | continue; |
564 | err = threshold_create_bank(cpu, bank); | |
565 | if (err) | |
566 | goto out; | |
567 | } | |
2903ee85 | 568 | out: |
89b831ef JS |
569 | return err; |
570 | } | |
571 | ||
89b831ef JS |
572 | /* |
573 | * let's be hotplug friendly. | |
574 | * in case of multiple core processors, the first core always takes ownership | |
575 | * of shared sysfs dir/files, and rest of the cores will be symlinked to it. | |
576 | */ | |
577 | ||
be6b5a35 | 578 | static void deallocate_threshold_block(unsigned int cpu, |
95268664 JS |
579 | unsigned int bank) |
580 | { | |
581 | struct threshold_block *pos = NULL; | |
582 | struct threshold_block *tmp = NULL; | |
583 | struct threshold_bank *head = per_cpu(threshold_banks, cpu)[bank]; | |
584 | ||
585 | if (!head) | |
586 | return; | |
587 | ||
588 | list_for_each_entry_safe(pos, tmp, &head->blocks->miscj, miscj) { | |
38a382ae | 589 | kobject_put(&pos->kobj); |
95268664 JS |
590 | list_del(&pos->miscj); |
591 | kfree(pos); | |
592 | } | |
593 | ||
594 | kfree(per_cpu(threshold_banks, cpu)[bank]->blocks); | |
595 | per_cpu(threshold_banks, cpu)[bank]->blocks = NULL; | |
596 | } | |
597 | ||
be6b5a35 | 598 | static void threshold_remove_bank(unsigned int cpu, int bank) |
89b831ef | 599 | { |
95268664 | 600 | int i = 0; |
89b831ef | 601 | struct threshold_bank *b; |
95268664 | 602 | char name[32]; |
89b831ef JS |
603 | |
604 | b = per_cpu(threshold_banks, cpu)[bank]; | |
95268664 | 605 | |
89b831ef JS |
606 | if (!b) |
607 | return; | |
95268664 JS |
608 | |
609 | if (!b->blocks) | |
610 | goto free_out; | |
611 | ||
612 | sprintf(name, "threshold_bank%i", bank); | |
613 | ||
02316067 | 614 | #ifdef CONFIG_SMP |
95268664 JS |
615 | /* sibling symlink */ |
616 | if (shared_bank[bank] && b->blocks->cpu != cpu) { | |
fff2e89f | 617 | sysfs_remove_link(&per_cpu(device_mce, cpu).kobj, name); |
0d2caebd | 618 | per_cpu(threshold_banks, cpu)[bank] = NULL; |
95268664 | 619 | return; |
89b831ef | 620 | } |
02316067 | 621 | #endif |
95268664 JS |
622 | |
623 | /* remove all sibling symlinks before unregistering */ | |
a1c33bbe | 624 | for_each_cpu(i, b->cpus) { |
95268664 JS |
625 | if (i == cpu) |
626 | continue; | |
627 | ||
628 | sysfs_remove_link(&per_cpu(device_mce, i).kobj, name); | |
629 | per_cpu(threshold_banks, i)[bank] = NULL; | |
630 | } | |
631 | ||
632 | deallocate_threshold_block(cpu, bank); | |
633 | ||
634 | free_out: | |
8735728e | 635 | kobject_del(b->kobj); |
38a382ae | 636 | kobject_put(b->kobj); |
a1c33bbe | 637 | free_cpumask_var(b->cpus); |
95268664 JS |
638 | kfree(b); |
639 | per_cpu(threshold_banks, cpu)[bank] = NULL; | |
89b831ef JS |
640 | } |
641 | ||
be6b5a35 | 642 | static void threshold_remove_device(unsigned int cpu) |
89b831ef | 643 | { |
2903ee85 | 644 | unsigned int bank; |
89b831ef JS |
645 | |
646 | for (bank = 0; bank < NR_BANKS; ++bank) { | |
5a96f4a5 | 647 | if (!(per_cpu(bank_map, cpu) & (1 << bank))) |
89b831ef JS |
648 | continue; |
649 | threshold_remove_bank(cpu, bank); | |
650 | } | |
89b831ef JS |
651 | } |
652 | ||
89b831ef | 653 | /* get notified when a cpu comes on/off */ |
8735728e RW |
654 | static void __cpuinit amd_64_threshold_cpu_callback(unsigned long action, |
655 | unsigned int cpu) | |
89b831ef | 656 | { |
89b831ef | 657 | if (cpu >= NR_CPUS) |
8735728e | 658 | return; |
89b831ef JS |
659 | |
660 | switch (action) { | |
661 | case CPU_ONLINE: | |
8bb78442 | 662 | case CPU_ONLINE_FROZEN: |
89b831ef | 663 | threshold_create_device(cpu); |
89b831ef JS |
664 | break; |
665 | case CPU_DEAD: | |
8bb78442 | 666 | case CPU_DEAD_FROZEN: |
89b831ef JS |
667 | threshold_remove_device(cpu); |
668 | break; | |
669 | default: | |
670 | break; | |
671 | } | |
89b831ef JS |
672 | } |
673 | ||
89b831ef JS |
674 | static __init int threshold_init_device(void) |
675 | { | |
2903ee85 | 676 | unsigned lcpu = 0; |
89b831ef | 677 | |
89b831ef JS |
678 | /* to hit CPUs online before the notifier is up */ |
679 | for_each_online_cpu(lcpu) { | |
fff2e89f | 680 | int err = threshold_create_device(lcpu); |
89b831ef | 681 | if (err) |
fff2e89f | 682 | return err; |
89b831ef | 683 | } |
8735728e | 684 | threshold_cpu_callback = amd_64_threshold_cpu_callback; |
fff2e89f | 685 | return 0; |
89b831ef JS |
686 | } |
687 | ||
688 | device_initcall(threshold_init_device); |