]>
Commit | Line | Data |
---|---|---|
89b831ef | 1 | /* |
11122570 | 2 | * (c) 2005-2012 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 | * | |
e6d41e8c | 9 | * Maintained by: Borislav Petkov <bp@alien8.de> |
89b831ef | 10 | * |
95268664 JS |
11 | * April 2006 |
12 | * - added support for AMD Family 0x10 processors | |
11122570 BP |
13 | * May 2012 |
14 | * - major scrubbing | |
89b831ef | 15 | * |
95268664 | 16 | * All MC4_MISCi registers are shared between multi-cores |
89b831ef | 17 | */ |
89b831ef | 18 | #include <linux/interrupt.h> |
89b831ef | 19 | #include <linux/notifier.h> |
1cb2a8e1 | 20 | #include <linux/kobject.h> |
34fa1967 | 21 | #include <linux/percpu.h> |
1cb2a8e1 IM |
22 | #include <linux/errno.h> |
23 | #include <linux/sched.h> | |
89b831ef | 24 | #include <linux/sysfs.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
1cb2a8e1 IM |
26 | #include <linux/init.h> |
27 | #include <linux/cpu.h> | |
28 | #include <linux/smp.h> | |
29 | ||
019f34fc | 30 | #include <asm/amd_nb.h> |
89b831ef | 31 | #include <asm/apic.h> |
1cb2a8e1 | 32 | #include <asm/idle.h> |
89b831ef JS |
33 | #include <asm/mce.h> |
34 | #include <asm/msr.h> | |
89b831ef | 35 | |
2903ee85 JS |
36 | #define NR_BANKS 6 |
37 | #define NR_BLOCKS 9 | |
38 | #define THRESHOLD_MAX 0xFFF | |
39 | #define INT_TYPE_APIC 0x00020000 | |
40 | #define MASK_VALID_HI 0x80000000 | |
24ce0e96 JB |
41 | #define MASK_CNTP_HI 0x40000000 |
42 | #define MASK_LOCKED_HI 0x20000000 | |
2903ee85 JS |
43 | #define MASK_LVTOFF_HI 0x00F00000 |
44 | #define MASK_COUNT_EN_HI 0x00080000 | |
45 | #define MASK_INT_TYPE_HI 0x00060000 | |
46 | #define MASK_OVERFLOW_HI 0x00010000 | |
89b831ef | 47 | #define MASK_ERR_COUNT_HI 0x00000FFF |
95268664 JS |
48 | #define MASK_BLKPTR_LO 0xFF000000 |
49 | #define MCG_XBLK_ADDR 0xC0000400 | |
89b831ef | 50 | |
336d335a BP |
51 | static const char * const th_names[] = { |
52 | "load_store", | |
53 | "insn_fetch", | |
54 | "combined_unit", | |
55 | "", | |
56 | "northbridge", | |
57 | "execution_unit", | |
58 | }; | |
59 | ||
204fba4a | 60 | static DEFINE_PER_CPU(struct threshold_bank * [NR_BANKS], threshold_banks); |
95268664 | 61 | |
89b831ef JS |
62 | static unsigned char shared_bank[NR_BANKS] = { |
63 | 0, 0, 0, 0, 1 | |
64 | }; | |
89b831ef JS |
65 | |
66 | static DEFINE_PER_CPU(unsigned char, bank_map); /* see which banks are on */ | |
67 | ||
b2762686 AK |
68 | static void amd_threshold_interrupt(void); |
69 | ||
89b831ef JS |
70 | /* |
71 | * CPU Initialization | |
72 | */ | |
73 | ||
4cd4601d | 74 | struct thresh_restart { |
1cb2a8e1 IM |
75 | struct threshold_block *b; |
76 | int reset; | |
9c37c9d8 RR |
77 | int set_lvt_off; |
78 | int lvt_off; | |
1cb2a8e1 | 79 | u16 old_limit; |
4cd4601d MT |
80 | }; |
81 | ||
336d335a BP |
82 | static const char * const bank4_names(struct threshold_block *b) |
83 | { | |
84 | switch (b->address) { | |
85 | /* MSR4_MISC0 */ | |
86 | case 0x00000413: | |
87 | return "dram"; | |
88 | ||
89 | case 0xc0000408: | |
90 | return "ht_links"; | |
91 | ||
92 | case 0xc0000409: | |
93 | return "l3_cache"; | |
94 | ||
95 | default: | |
96 | WARN(1, "Funny MSR: 0x%08x\n", b->address); | |
97 | return ""; | |
98 | } | |
99 | }; | |
100 | ||
101 | ||
f227d430 BP |
102 | static bool lvt_interrupt_supported(unsigned int bank, u32 msr_high_bits) |
103 | { | |
104 | /* | |
105 | * bank 4 supports APIC LVT interrupts implicitly since forever. | |
106 | */ | |
107 | if (bank == 4) | |
108 | return true; | |
109 | ||
110 | /* | |
111 | * IntP: interrupt present; if this bit is set, the thresholding | |
112 | * bank can generate APIC LVT interrupts | |
113 | */ | |
114 | return msr_high_bits & BIT(28); | |
115 | } | |
116 | ||
bbaff08d RR |
117 | static int lvt_off_valid(struct threshold_block *b, int apic, u32 lo, u32 hi) |
118 | { | |
119 | int msr = (hi & MASK_LVTOFF_HI) >> 20; | |
120 | ||
121 | if (apic < 0) { | |
122 | pr_err(FW_BUG "cpu %d, failed to setup threshold interrupt " | |
123 | "for bank %d, block %d (MSR%08X=0x%x%08x)\n", b->cpu, | |
124 | b->bank, b->block, b->address, hi, lo); | |
125 | return 0; | |
126 | } | |
127 | ||
128 | if (apic != msr) { | |
129 | pr_err(FW_BUG "cpu %d, invalid threshold interrupt offset %d " | |
130 | "for bank %d, block %d (MSR%08X=0x%x%08x)\n", | |
131 | b->cpu, apic, b->bank, b->block, b->address, hi, lo); | |
132 | return 0; | |
133 | } | |
134 | ||
135 | return 1; | |
136 | }; | |
137 | ||
f227d430 BP |
138 | /* |
139 | * Called via smp_call_function_single(), must be called with correct | |
140 | * cpu affinity. | |
141 | */ | |
a6b6a14e | 142 | static void threshold_restart_bank(void *_tr) |
89b831ef | 143 | { |
4cd4601d | 144 | struct thresh_restart *tr = _tr; |
7203a049 | 145 | u32 hi, lo; |
89b831ef | 146 | |
7203a049 | 147 | rdmsr(tr->b->address, lo, hi); |
89b831ef | 148 | |
7203a049 | 149 | if (tr->b->threshold_limit < (hi & THRESHOLD_MAX)) |
4cd4601d | 150 | tr->reset = 1; /* limit cannot be lower than err count */ |
89b831ef | 151 | |
4cd4601d | 152 | if (tr->reset) { /* reset err count and overflow bit */ |
7203a049 RR |
153 | hi = |
154 | (hi & ~(MASK_ERR_COUNT_HI | MASK_OVERFLOW_HI)) | | |
4cd4601d MT |
155 | (THRESHOLD_MAX - tr->b->threshold_limit); |
156 | } else if (tr->old_limit) { /* change limit w/o reset */ | |
7203a049 | 157 | int new_count = (hi & THRESHOLD_MAX) + |
4cd4601d | 158 | (tr->old_limit - tr->b->threshold_limit); |
1cb2a8e1 | 159 | |
7203a049 | 160 | hi = (hi & ~MASK_ERR_COUNT_HI) | |
89b831ef JS |
161 | (new_count & THRESHOLD_MAX); |
162 | } | |
163 | ||
f227d430 BP |
164 | /* clear IntType */ |
165 | hi &= ~MASK_INT_TYPE_HI; | |
166 | ||
167 | if (!tr->b->interrupt_capable) | |
168 | goto done; | |
169 | ||
9c37c9d8 | 170 | if (tr->set_lvt_off) { |
bbaff08d RR |
171 | if (lvt_off_valid(tr->b, tr->lvt_off, lo, hi)) { |
172 | /* set new lvt offset */ | |
173 | hi &= ~MASK_LVTOFF_HI; | |
174 | hi |= tr->lvt_off << 20; | |
175 | } | |
9c37c9d8 RR |
176 | } |
177 | ||
f227d430 BP |
178 | if (tr->b->interrupt_enable) |
179 | hi |= INT_TYPE_APIC; | |
180 | ||
181 | done: | |
89b831ef | 182 | |
7203a049 RR |
183 | hi |= MASK_COUNT_EN_HI; |
184 | wrmsr(tr->b->address, lo, hi); | |
89b831ef JS |
185 | } |
186 | ||
9c37c9d8 RR |
187 | static void mce_threshold_block_init(struct threshold_block *b, int offset) |
188 | { | |
189 | struct thresh_restart tr = { | |
190 | .b = b, | |
191 | .set_lvt_off = 1, | |
192 | .lvt_off = offset, | |
193 | }; | |
194 | ||
195 | b->threshold_limit = THRESHOLD_MAX; | |
196 | threshold_restart_bank(&tr); | |
197 | }; | |
198 | ||
bbaff08d RR |
199 | static int setup_APIC_mce(int reserved, int new) |
200 | { | |
201 | if (reserved < 0 && !setup_APIC_eilvt(new, THRESHOLD_APIC_VECTOR, | |
202 | APIC_EILVT_MSG_FIX, 0)) | |
203 | return new; | |
204 | ||
205 | return reserved; | |
206 | } | |
207 | ||
95268664 | 208 | /* cpu init entry point, called from mce.c with preempt off */ |
cc3ca220 | 209 | void mce_amd_feature_init(struct cpuinfo_x86 *c) |
89b831ef | 210 | { |
9c37c9d8 | 211 | struct threshold_block b; |
89b831ef | 212 | unsigned int cpu = smp_processor_id(); |
95268664 | 213 | u32 low = 0, high = 0, address = 0; |
1cb2a8e1 | 214 | unsigned int bank, block; |
bbaff08d | 215 | int offset = -1; |
89b831ef JS |
216 | |
217 | for (bank = 0; bank < NR_BANKS; ++bank) { | |
95268664 JS |
218 | for (block = 0; block < NR_BLOCKS; ++block) { |
219 | if (block == 0) | |
220 | address = MSR_IA32_MC0_MISC + bank * 4; | |
24ce0e96 JB |
221 | else if (block == 1) { |
222 | address = (low & MASK_BLKPTR_LO) >> 21; | |
223 | if (!address) | |
224 | break; | |
6dcbfe4f | 225 | |
24ce0e96 | 226 | address += MCG_XBLK_ADDR; |
1cb2a8e1 | 227 | } else |
95268664 JS |
228 | ++address; |
229 | ||
230 | if (rdmsr_safe(address, &low, &high)) | |
24ce0e96 | 231 | break; |
95268664 | 232 | |
6dcbfe4f BP |
233 | if (!(high & MASK_VALID_HI)) |
234 | continue; | |
95268664 | 235 | |
24ce0e96 JB |
236 | if (!(high & MASK_CNTP_HI) || |
237 | (high & MASK_LOCKED_HI)) | |
95268664 JS |
238 | continue; |
239 | ||
240 | if (!block) | |
241 | per_cpu(bank_map, cpu) |= (1 << bank); | |
141168c3 | 242 | |
9c37c9d8 | 243 | memset(&b, 0, sizeof(b)); |
f227d430 BP |
244 | b.cpu = cpu; |
245 | b.bank = bank; | |
246 | b.block = block; | |
247 | b.address = address; | |
248 | b.interrupt_capable = lvt_interrupt_supported(bank, high); | |
249 | ||
250 | if (b.interrupt_capable) { | |
251 | int new = (high & MASK_LVTOFF_HI) >> 20; | |
252 | offset = setup_APIC_mce(offset, new); | |
253 | } | |
b2762686 | 254 | |
9c37c9d8 | 255 | mce_threshold_block_init(&b, offset); |
b2762686 | 256 | mce_threshold_vector = amd_threshold_interrupt; |
95268664 | 257 | } |
89b831ef JS |
258 | } |
259 | } | |
260 | ||
261 | /* | |
262 | * APIC Interrupt Handler | |
263 | */ | |
264 | ||
265 | /* | |
266 | * threshold interrupt handler will service THRESHOLD_APIC_VECTOR. | |
267 | * the interrupt goes off when error_count reaches threshold_limit. | |
268 | * the handler will simply log mcelog w/ software defined bank number. | |
269 | */ | |
b2762686 | 270 | static void amd_threshold_interrupt(void) |
89b831ef | 271 | { |
1cb2a8e1 | 272 | u32 low = 0, high = 0, address = 0; |
95268664 | 273 | unsigned int bank, block; |
89b831ef JS |
274 | struct mce m; |
275 | ||
b5f2fa4e | 276 | mce_setup(&m); |
89b831ef JS |
277 | |
278 | /* assume first bank caused it */ | |
279 | for (bank = 0; bank < NR_BANKS; ++bank) { | |
24ce0e96 JB |
280 | if (!(per_cpu(bank_map, m.cpu) & (1 << bank))) |
281 | continue; | |
95268664 | 282 | for (block = 0; block < NR_BLOCKS; ++block) { |
1cb2a8e1 | 283 | if (block == 0) { |
95268664 | 284 | address = MSR_IA32_MC0_MISC + bank * 4; |
1cb2a8e1 | 285 | } else if (block == 1) { |
24ce0e96 JB |
286 | address = (low & MASK_BLKPTR_LO) >> 21; |
287 | if (!address) | |
288 | break; | |
289 | address += MCG_XBLK_ADDR; | |
1cb2a8e1 | 290 | } else { |
95268664 | 291 | ++address; |
1cb2a8e1 | 292 | } |
95268664 JS |
293 | |
294 | if (rdmsr_safe(address, &low, &high)) | |
24ce0e96 | 295 | break; |
95268664 JS |
296 | |
297 | if (!(high & MASK_VALID_HI)) { | |
298 | if (block) | |
299 | continue; | |
300 | else | |
301 | break; | |
302 | } | |
303 | ||
24ce0e96 JB |
304 | if (!(high & MASK_CNTP_HI) || |
305 | (high & MASK_LOCKED_HI)) | |
95268664 JS |
306 | continue; |
307 | ||
1cb2a8e1 IM |
308 | /* |
309 | * Log the machine check that caused the threshold | |
310 | * event. | |
311 | */ | |
ee031c31 AK |
312 | machine_check_poll(MCP_TIMESTAMP, |
313 | &__get_cpu_var(mce_poll_banks)); | |
a98f0dd3 | 314 | |
95268664 JS |
315 | if (high & MASK_OVERFLOW_HI) { |
316 | rdmsrl(address, m.misc); | |
317 | rdmsrl(MSR_IA32_MC0_STATUS + bank * 4, | |
318 | m.status); | |
319 | m.bank = K8_MCE_THRESHOLD_BASE | |
320 | + bank * NR_BLOCKS | |
321 | + block; | |
322 | mce_log(&m); | |
b2762686 | 323 | return; |
95268664 | 324 | } |
89b831ef JS |
325 | } |
326 | } | |
89b831ef JS |
327 | } |
328 | ||
329 | /* | |
330 | * Sysfs Interface | |
331 | */ | |
332 | ||
89b831ef | 333 | struct threshold_attr { |
2903ee85 | 334 | struct attribute attr; |
1cb2a8e1 IM |
335 | ssize_t (*show) (struct threshold_block *, char *); |
336 | ssize_t (*store) (struct threshold_block *, const char *, size_t count); | |
89b831ef JS |
337 | }; |
338 | ||
1cb2a8e1 IM |
339 | #define SHOW_FIELDS(name) \ |
340 | static ssize_t show_ ## name(struct threshold_block *b, char *buf) \ | |
341 | { \ | |
18c20f37 | 342 | return sprintf(buf, "%lu\n", (unsigned long) b->name); \ |
2903ee85 | 343 | } |
89b831ef JS |
344 | SHOW_FIELDS(interrupt_enable) |
345 | SHOW_FIELDS(threshold_limit) | |
346 | ||
1cb2a8e1 | 347 | static ssize_t |
9319cec8 | 348 | store_interrupt_enable(struct threshold_block *b, const char *buf, size_t size) |
89b831ef | 349 | { |
4cd4601d | 350 | struct thresh_restart tr; |
1cb2a8e1 | 351 | unsigned long new; |
1cb2a8e1 | 352 | |
f227d430 BP |
353 | if (!b->interrupt_capable) |
354 | return -EINVAL; | |
355 | ||
9319cec8 | 356 | if (strict_strtoul(buf, 0, &new) < 0) |
89b831ef | 357 | return -EINVAL; |
1cb2a8e1 | 358 | |
89b831ef JS |
359 | b->interrupt_enable = !!new; |
360 | ||
9c37c9d8 | 361 | memset(&tr, 0, sizeof(tr)); |
1cb2a8e1 | 362 | tr.b = b; |
1cb2a8e1 | 363 | |
a6b6a14e | 364 | smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1); |
89b831ef | 365 | |
9319cec8 | 366 | return size; |
89b831ef JS |
367 | } |
368 | ||
1cb2a8e1 | 369 | static ssize_t |
9319cec8 | 370 | store_threshold_limit(struct threshold_block *b, const char *buf, size_t size) |
89b831ef | 371 | { |
4cd4601d | 372 | struct thresh_restart tr; |
1cb2a8e1 | 373 | unsigned long new; |
1cb2a8e1 | 374 | |
9319cec8 | 375 | if (strict_strtoul(buf, 0, &new) < 0) |
89b831ef | 376 | return -EINVAL; |
1cb2a8e1 | 377 | |
89b831ef JS |
378 | if (new > THRESHOLD_MAX) |
379 | new = THRESHOLD_MAX; | |
380 | if (new < 1) | |
381 | new = 1; | |
1cb2a8e1 | 382 | |
9c37c9d8 | 383 | memset(&tr, 0, sizeof(tr)); |
4cd4601d | 384 | tr.old_limit = b->threshold_limit; |
89b831ef | 385 | b->threshold_limit = new; |
4cd4601d | 386 | tr.b = b; |
89b831ef | 387 | |
a6b6a14e | 388 | smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1); |
89b831ef | 389 | |
9319cec8 | 390 | return size; |
89b831ef JS |
391 | } |
392 | ||
4cd4601d MT |
393 | static ssize_t show_error_count(struct threshold_block *b, char *buf) |
394 | { | |
2c9c42fa BP |
395 | u32 lo, hi; |
396 | ||
397 | rdmsr_on_cpu(b->cpu, b->address, &lo, &hi); | |
a6b6a14e | 398 | |
2c9c42fa BP |
399 | return sprintf(buf, "%u\n", ((hi & THRESHOLD_MAX) - |
400 | (THRESHOLD_MAX - b->threshold_limit))); | |
89b831ef JS |
401 | } |
402 | ||
6e927361 BP |
403 | static struct threshold_attr error_count = { |
404 | .attr = {.name = __stringify(error_count), .mode = 0444 }, | |
405 | .show = show_error_count, | |
406 | }; | |
89b831ef | 407 | |
34fa1967 HS |
408 | #define RW_ATTR(val) \ |
409 | static struct threshold_attr val = { \ | |
410 | .attr = {.name = __stringify(val), .mode = 0644 }, \ | |
411 | .show = show_## val, \ | |
412 | .store = store_## val, \ | |
89b831ef JS |
413 | }; |
414 | ||
2903ee85 JS |
415 | RW_ATTR(interrupt_enable); |
416 | RW_ATTR(threshold_limit); | |
89b831ef JS |
417 | |
418 | static struct attribute *default_attrs[] = { | |
89b831ef JS |
419 | &threshold_limit.attr, |
420 | &error_count.attr, | |
d26ecc48 BP |
421 | NULL, /* possibly interrupt_enable if supported, see below */ |
422 | NULL, | |
89b831ef JS |
423 | }; |
424 | ||
1cb2a8e1 IM |
425 | #define to_block(k) container_of(k, struct threshold_block, kobj) |
426 | #define to_attr(a) container_of(a, struct threshold_attr, attr) | |
89b831ef JS |
427 | |
428 | static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf) | |
429 | { | |
95268664 | 430 | struct threshold_block *b = to_block(kobj); |
89b831ef JS |
431 | struct threshold_attr *a = to_attr(attr); |
432 | ssize_t ret; | |
1cb2a8e1 | 433 | |
89b831ef | 434 | ret = a->show ? a->show(b, buf) : -EIO; |
1cb2a8e1 | 435 | |
89b831ef JS |
436 | return ret; |
437 | } | |
438 | ||
439 | static ssize_t store(struct kobject *kobj, struct attribute *attr, | |
440 | const char *buf, size_t count) | |
441 | { | |
95268664 | 442 | struct threshold_block *b = to_block(kobj); |
89b831ef JS |
443 | struct threshold_attr *a = to_attr(attr); |
444 | ssize_t ret; | |
1cb2a8e1 | 445 | |
89b831ef | 446 | ret = a->store ? a->store(b, buf, count) : -EIO; |
1cb2a8e1 | 447 | |
89b831ef JS |
448 | return ret; |
449 | } | |
450 | ||
52cf25d0 | 451 | static const struct sysfs_ops threshold_ops = { |
1cb2a8e1 IM |
452 | .show = show, |
453 | .store = store, | |
89b831ef JS |
454 | }; |
455 | ||
456 | static struct kobj_type threshold_ktype = { | |
1cb2a8e1 IM |
457 | .sysfs_ops = &threshold_ops, |
458 | .default_attrs = default_attrs, | |
89b831ef JS |
459 | }; |
460 | ||
95268664 JS |
461 | static __cpuinit int allocate_threshold_blocks(unsigned int cpu, |
462 | unsigned int bank, | |
463 | unsigned int block, | |
464 | u32 address) | |
465 | { | |
95268664 | 466 | struct threshold_block *b = NULL; |
1cb2a8e1 IM |
467 | u32 low, high; |
468 | int err; | |
95268664 JS |
469 | |
470 | if ((bank >= NR_BANKS) || (block >= NR_BLOCKS)) | |
471 | return 0; | |
472 | ||
a6b6a14e | 473 | if (rdmsr_safe_on_cpu(cpu, address, &low, &high)) |
24ce0e96 | 474 | return 0; |
95268664 JS |
475 | |
476 | if (!(high & MASK_VALID_HI)) { | |
477 | if (block) | |
478 | goto recurse; | |
479 | else | |
480 | return 0; | |
481 | } | |
482 | ||
24ce0e96 JB |
483 | if (!(high & MASK_CNTP_HI) || |
484 | (high & MASK_LOCKED_HI)) | |
95268664 JS |
485 | goto recurse; |
486 | ||
487 | b = kzalloc(sizeof(struct threshold_block), GFP_KERNEL); | |
488 | if (!b) | |
489 | return -ENOMEM; | |
95268664 | 490 | |
1cb2a8e1 IM |
491 | b->block = block; |
492 | b->bank = bank; | |
493 | b->cpu = cpu; | |
494 | b->address = address; | |
495 | b->interrupt_enable = 0; | |
f227d430 | 496 | b->interrupt_capable = lvt_interrupt_supported(bank, high); |
1cb2a8e1 | 497 | b->threshold_limit = THRESHOLD_MAX; |
95268664 | 498 | |
d26ecc48 BP |
499 | if (b->interrupt_capable) |
500 | threshold_ktype.default_attrs[2] = &interrupt_enable.attr; | |
501 | else | |
502 | threshold_ktype.default_attrs[2] = NULL; | |
503 | ||
95268664 JS |
504 | INIT_LIST_HEAD(&b->miscj); |
505 | ||
1cb2a8e1 | 506 | if (per_cpu(threshold_banks, cpu)[bank]->blocks) { |
95268664 JS |
507 | list_add(&b->miscj, |
508 | &per_cpu(threshold_banks, cpu)[bank]->blocks->miscj); | |
1cb2a8e1 | 509 | } else { |
95268664 | 510 | per_cpu(threshold_banks, cpu)[bank]->blocks = b; |
1cb2a8e1 | 511 | } |
95268664 | 512 | |
542eb75a GKH |
513 | err = kobject_init_and_add(&b->kobj, &threshold_ktype, |
514 | per_cpu(threshold_banks, cpu)[bank]->kobj, | |
336d335a | 515 | (bank == 4 ? bank4_names(b) : th_names[bank])); |
95268664 JS |
516 | if (err) |
517 | goto out_free; | |
518 | recurse: | |
519 | if (!block) { | |
520 | address = (low & MASK_BLKPTR_LO) >> 21; | |
521 | if (!address) | |
522 | return 0; | |
523 | address += MCG_XBLK_ADDR; | |
1cb2a8e1 | 524 | } else { |
95268664 | 525 | ++address; |
1cb2a8e1 | 526 | } |
95268664 JS |
527 | |
528 | err = allocate_threshold_blocks(cpu, bank, ++block, address); | |
529 | if (err) | |
530 | goto out_free; | |
531 | ||
213eca7f GKH |
532 | if (b) |
533 | kobject_uevent(&b->kobj, KOBJ_ADD); | |
542eb75a | 534 | |
95268664 JS |
535 | return err; |
536 | ||
537 | out_free: | |
538 | if (b) { | |
38a382ae | 539 | kobject_put(&b->kobj); |
d9a5ac9e | 540 | list_del(&b->miscj); |
95268664 JS |
541 | kfree(b); |
542 | } | |
543 | return err; | |
544 | } | |
545 | ||
019f34fc BP |
546 | static __cpuinit int __threshold_add_blocks(struct threshold_bank *b) |
547 | { | |
548 | struct list_head *head = &b->blocks->miscj; | |
549 | struct threshold_block *pos = NULL; | |
550 | struct threshold_block *tmp = NULL; | |
551 | int err = 0; | |
552 | ||
553 | err = kobject_add(&b->blocks->kobj, b->kobj, b->blocks->kobj.name); | |
554 | if (err) | |
555 | return err; | |
556 | ||
557 | list_for_each_entry_safe(pos, tmp, head, miscj) { | |
558 | ||
559 | err = kobject_add(&pos->kobj, b->kobj, pos->kobj.name); | |
560 | if (err) { | |
561 | list_for_each_entry_safe_reverse(pos, tmp, head, miscj) | |
562 | kobject_del(&pos->kobj); | |
563 | ||
564 | return err; | |
565 | } | |
566 | } | |
567 | return err; | |
568 | } | |
569 | ||
95268664 | 570 | static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank) |
89b831ef | 571 | { |
d6126ef5 | 572 | struct device *dev = per_cpu(mce_device, cpu); |
019f34fc | 573 | struct amd_northbridge *nb = NULL; |
92e26e2a | 574 | struct threshold_bank *b = NULL; |
336d335a | 575 | const char *name = th_names[bank]; |
92e26e2a | 576 | int err = 0; |
95268664 | 577 | |
019f34fc | 578 | if (shared_bank[bank]) { |
019f34fc | 579 | nb = node_to_amd_nb(amd_get_nb_id(cpu)); |
019f34fc BP |
580 | |
581 | /* threshold descriptor already initialized on this node? */ | |
21c5e50e | 582 | if (nb && nb->bank4) { |
019f34fc BP |
583 | /* yes, use it */ |
584 | b = nb->bank4; | |
585 | err = kobject_add(b->kobj, &dev->kobj, name); | |
586 | if (err) | |
587 | goto out; | |
588 | ||
589 | per_cpu(threshold_banks, cpu)[bank] = b; | |
590 | atomic_inc(&b->cpus); | |
591 | ||
592 | err = __threshold_add_blocks(b); | |
593 | ||
594 | goto out; | |
595 | } | |
596 | } | |
597 | ||
95268664 | 598 | b = kzalloc(sizeof(struct threshold_bank), GFP_KERNEL); |
89b831ef JS |
599 | if (!b) { |
600 | err = -ENOMEM; | |
601 | goto out; | |
602 | } | |
89b831ef | 603 | |
e032d807 | 604 | b->kobj = kobject_create_and_add(name, &dev->kobj); |
92e26e2a BP |
605 | if (!b->kobj) { |
606 | err = -EINVAL; | |
a521cf20 | 607 | goto out_free; |
92e26e2a | 608 | } |
95268664 | 609 | |
89b831ef | 610 | per_cpu(threshold_banks, cpu)[bank] = b; |
95268664 | 611 | |
019f34fc BP |
612 | if (shared_bank[bank]) { |
613 | atomic_set(&b->cpus, 1); | |
614 | ||
615 | /* nb is already initialized, see above */ | |
21c5e50e DB |
616 | if (nb) { |
617 | WARN_ON(nb->bank4); | |
618 | nb->bank4 = b; | |
619 | } | |
019f34fc BP |
620 | } |
621 | ||
26ab256e BP |
622 | err = allocate_threshold_blocks(cpu, bank, 0, |
623 | MSR_IA32_MC0_MISC + bank * 4); | |
92e26e2a BP |
624 | if (!err) |
625 | goto out; | |
95268664 | 626 | |
019f34fc | 627 | out_free: |
95268664 | 628 | kfree(b); |
019f34fc BP |
629 | |
630 | out: | |
89b831ef JS |
631 | return err; |
632 | } | |
633 | ||
634 | /* create dir/files for all valid threshold banks */ | |
635 | static __cpuinit int threshold_create_device(unsigned int cpu) | |
636 | { | |
2903ee85 | 637 | unsigned int bank; |
89b831ef JS |
638 | int err = 0; |
639 | ||
89b831ef | 640 | for (bank = 0; bank < NR_BANKS; ++bank) { |
5a96f4a5 | 641 | if (!(per_cpu(bank_map, cpu) & (1 << bank))) |
89b831ef JS |
642 | continue; |
643 | err = threshold_create_bank(cpu, bank); | |
644 | if (err) | |
0a17941e | 645 | return err; |
89b831ef | 646 | } |
0a17941e | 647 | |
89b831ef JS |
648 | return err; |
649 | } | |
650 | ||
be6b5a35 | 651 | static void deallocate_threshold_block(unsigned int cpu, |
95268664 JS |
652 | unsigned int bank) |
653 | { | |
654 | struct threshold_block *pos = NULL; | |
655 | struct threshold_block *tmp = NULL; | |
656 | struct threshold_bank *head = per_cpu(threshold_banks, cpu)[bank]; | |
657 | ||
658 | if (!head) | |
659 | return; | |
660 | ||
661 | list_for_each_entry_safe(pos, tmp, &head->blocks->miscj, miscj) { | |
38a382ae | 662 | kobject_put(&pos->kobj); |
95268664 JS |
663 | list_del(&pos->miscj); |
664 | kfree(pos); | |
665 | } | |
666 | ||
667 | kfree(per_cpu(threshold_banks, cpu)[bank]->blocks); | |
668 | per_cpu(threshold_banks, cpu)[bank]->blocks = NULL; | |
669 | } | |
670 | ||
019f34fc BP |
671 | static void __threshold_remove_blocks(struct threshold_bank *b) |
672 | { | |
673 | struct threshold_block *pos = NULL; | |
674 | struct threshold_block *tmp = NULL; | |
675 | ||
676 | kobject_del(b->kobj); | |
677 | ||
678 | list_for_each_entry_safe(pos, tmp, &b->blocks->miscj, miscj) | |
679 | kobject_del(&pos->kobj); | |
680 | } | |
681 | ||
be6b5a35 | 682 | static void threshold_remove_bank(unsigned int cpu, int bank) |
89b831ef | 683 | { |
019f34fc | 684 | struct amd_northbridge *nb; |
89b831ef | 685 | struct threshold_bank *b; |
89b831ef JS |
686 | |
687 | b = per_cpu(threshold_banks, cpu)[bank]; | |
688 | if (!b) | |
689 | return; | |
019f34fc | 690 | |
95268664 JS |
691 | if (!b->blocks) |
692 | goto free_out; | |
693 | ||
019f34fc BP |
694 | if (shared_bank[bank]) { |
695 | if (!atomic_dec_and_test(&b->cpus)) { | |
696 | __threshold_remove_blocks(b); | |
697 | per_cpu(threshold_banks, cpu)[bank] = NULL; | |
698 | return; | |
699 | } else { | |
700 | /* | |
701 | * the last CPU on this node using the shared bank is | |
702 | * going away, remove that bank now. | |
703 | */ | |
704 | nb = node_to_amd_nb(amd_get_nb_id(cpu)); | |
705 | nb->bank4 = NULL; | |
706 | } | |
707 | } | |
708 | ||
95268664 JS |
709 | deallocate_threshold_block(cpu, bank); |
710 | ||
711 | free_out: | |
8735728e | 712 | kobject_del(b->kobj); |
38a382ae | 713 | kobject_put(b->kobj); |
95268664 JS |
714 | kfree(b); |
715 | per_cpu(threshold_banks, cpu)[bank] = NULL; | |
89b831ef JS |
716 | } |
717 | ||
be6b5a35 | 718 | static void threshold_remove_device(unsigned int cpu) |
89b831ef | 719 | { |
2903ee85 | 720 | unsigned int bank; |
89b831ef JS |
721 | |
722 | for (bank = 0; bank < NR_BANKS; ++bank) { | |
5a96f4a5 | 723 | if (!(per_cpu(bank_map, cpu) & (1 << bank))) |
89b831ef JS |
724 | continue; |
725 | threshold_remove_bank(cpu, bank); | |
726 | } | |
89b831ef JS |
727 | } |
728 | ||
89b831ef | 729 | /* get notified when a cpu comes on/off */ |
1cb2a8e1 IM |
730 | static void __cpuinit |
731 | amd_64_threshold_cpu_callback(unsigned long action, unsigned int cpu) | |
89b831ef | 732 | { |
89b831ef JS |
733 | switch (action) { |
734 | case CPU_ONLINE: | |
8bb78442 | 735 | case CPU_ONLINE_FROZEN: |
89b831ef | 736 | threshold_create_device(cpu); |
89b831ef JS |
737 | break; |
738 | case CPU_DEAD: | |
8bb78442 | 739 | case CPU_DEAD_FROZEN: |
89b831ef JS |
740 | threshold_remove_device(cpu); |
741 | break; | |
742 | default: | |
743 | break; | |
744 | } | |
89b831ef JS |
745 | } |
746 | ||
89b831ef JS |
747 | static __init int threshold_init_device(void) |
748 | { | |
2903ee85 | 749 | unsigned lcpu = 0; |
89b831ef | 750 | |
89b831ef JS |
751 | /* to hit CPUs online before the notifier is up */ |
752 | for_each_online_cpu(lcpu) { | |
fff2e89f | 753 | int err = threshold_create_device(lcpu); |
1cb2a8e1 | 754 | |
89b831ef | 755 | if (err) |
fff2e89f | 756 | return err; |
89b831ef | 757 | } |
8735728e | 758 | threshold_cpu_callback = amd_64_threshold_cpu_callback; |
1cb2a8e1 | 759 | |
fff2e89f | 760 | return 0; |
89b831ef | 761 | } |
a8fccdb0 LJ |
762 | /* |
763 | * there are 3 funcs which need to be _initcalled in a logic sequence: | |
764 | * 1. xen_late_init_mcelog | |
765 | * 2. mcheck_init_device | |
766 | * 3. threshold_init_device | |
767 | * | |
768 | * xen_late_init_mcelog must register xen_mce_chrdev_device before | |
769 | * native mce_chrdev_device registration if running under xen platform; | |
770 | * | |
771 | * mcheck_init_device should be inited before threshold_init_device to | |
772 | * initialize mce_device, otherwise a NULL ptr dereference will cause panic. | |
773 | * | |
774 | * so we use following _initcalls | |
775 | * 1. device_initcall(xen_late_init_mcelog); | |
776 | * 2. device_initcall_sync(mcheck_init_device); | |
777 | * 3. late_initcall(threshold_init_device); | |
778 | * | |
779 | * when running under xen, the initcall order is 1,2,3; | |
780 | * on baremetal, we skip 1 and we do only 2 and 3. | |
781 | */ | |
782 | late_initcall(threshold_init_device); |