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Commit | Line | Data |
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d334a491 HY |
1 | /* |
2 | * APEI Generic Hardware Error Source support | |
3 | * | |
4 | * Generic Hardware Error Source provides a way to report platform | |
5 | * hardware errors (such as that from chipset). It works in so called | |
6 | * "Firmware First" mode, that is, hardware errors are reported to | |
7 | * firmware firstly, then reported to Linux by firmware. This way, | |
8 | * some non-standard hardware error registers or non-standard hardware | |
9 | * link can be checked by firmware to produce more hardware error | |
10 | * information for Linux. | |
11 | * | |
12 | * For more information about Generic Hardware Error Source, please | |
13 | * refer to ACPI Specification version 4.0, section 17.3.2.6 | |
14 | * | |
67eb2e99 | 15 | * Copyright 2010,2011 Intel Corp. |
d334a491 HY |
16 | * Author: Huang Ying <ying.huang@intel.com> |
17 | * | |
18 | * This program is free software; you can redistribute it and/or | |
19 | * modify it under the terms of the GNU General Public License version | |
20 | * 2 as published by the Free Software Foundation; | |
21 | * | |
22 | * This program is distributed in the hope that it will be useful, | |
23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | * GNU General Public License for more details. | |
d334a491 HY |
26 | */ |
27 | ||
28 | #include <linux/kernel.h> | |
020bf066 | 29 | #include <linux/moduleparam.h> |
d334a491 HY |
30 | #include <linux/init.h> |
31 | #include <linux/acpi.h> | |
32 | #include <linux/io.h> | |
33 | #include <linux/interrupt.h> | |
81e88fdc | 34 | #include <linux/timer.h> |
d334a491 HY |
35 | #include <linux/cper.h> |
36 | #include <linux/kdebug.h> | |
7ad6e943 HY |
37 | #include <linux/platform_device.h> |
38 | #include <linux/mutex.h> | |
32c361f5 | 39 | #include <linux/ratelimit.h> |
81e88fdc | 40 | #include <linux/vmalloc.h> |
67eb2e99 HY |
41 | #include <linux/irq_work.h> |
42 | #include <linux/llist.h> | |
43 | #include <linux/genalloc.h> | |
a654e5ee HY |
44 | #include <linux/pci.h> |
45 | #include <linux/aer.h> | |
44a69f61 | 46 | #include <linux/nmi.h> |
67e3bd66 TB |
47 | #include <linux/uuid.h> |
48 | #include <linux/ras.h> | |
40e06415 | 49 | |
87400177 | 50 | #include <acpi/actbl1.h> |
40e06415 | 51 | #include <acpi/ghes.h> |
9dae3d0d | 52 | #include <acpi/apei.h> |
81e88fdc | 53 | #include <asm/tlbflush.h> |
67e3bd66 | 54 | #include <ras/ras_event.h> |
d334a491 HY |
55 | |
56 | #include "apei-internal.h" | |
57 | ||
58 | #define GHES_PFX "GHES: " | |
59 | ||
60 | #define GHES_ESTATUS_MAX_SIZE 65536 | |
67eb2e99 HY |
61 | #define GHES_ESOURCE_PREALLOC_MAX_SIZE 65536 |
62 | ||
63 | #define GHES_ESTATUS_POOL_MIN_ALLOC_ORDER 3 | |
64 | ||
152cef40 HY |
65 | /* This is just an estimation for memory pool allocation */ |
66 | #define GHES_ESTATUS_CACHE_AVG_SIZE 512 | |
67 | ||
68 | #define GHES_ESTATUS_CACHES_SIZE 4 | |
69 | ||
70cb6e1d | 70 | #define GHES_ESTATUS_IN_CACHE_MAX_NSEC 10000000000ULL |
152cef40 HY |
71 | /* Prevent too many caches are allocated because of RCU */ |
72 | #define GHES_ESTATUS_CACHE_ALLOCED_MAX (GHES_ESTATUS_CACHES_SIZE * 3 / 2) | |
73 | ||
74 | #define GHES_ESTATUS_CACHE_LEN(estatus_len) \ | |
75 | (sizeof(struct ghes_estatus_cache) + (estatus_len)) | |
76 | #define GHES_ESTATUS_FROM_CACHE(estatus_cache) \ | |
0a00fd5e | 77 | ((struct acpi_hest_generic_status *) \ |
152cef40 HY |
78 | ((struct ghes_estatus_cache *)(estatus_cache) + 1)) |
79 | ||
67eb2e99 HY |
80 | #define GHES_ESTATUS_NODE_LEN(estatus_len) \ |
81 | (sizeof(struct ghes_estatus_node) + (estatus_len)) | |
88f074f4 | 82 | #define GHES_ESTATUS_FROM_NODE(estatus_node) \ |
0a00fd5e | 83 | ((struct acpi_hest_generic_status *) \ |
67eb2e99 | 84 | ((struct ghes_estatus_node *)(estatus_node) + 1)) |
d334a491 | 85 | |
87400177 TB |
86 | static inline bool is_hest_type_generic_v2(struct ghes *ghes) |
87 | { | |
88 | return ghes->generic->header.type == ACPI_HEST_TYPE_GENERIC_ERROR_V2; | |
89 | } | |
90 | ||
020bf066 PG |
91 | /* |
92 | * This driver isn't really modular, however for the time being, | |
93 | * continuing to use module_param is the easiest way to remain | |
94 | * compatible with existing boot arg use cases. | |
95 | */ | |
90ab5ee9 | 96 | bool ghes_disable; |
b6a95016 HY |
97 | module_param_named(disable, ghes_disable, bool, 0); |
98 | ||
d334a491 | 99 | /* |
81e88fdc HY |
100 | * All error sources notified with SCI shares one notifier function, |
101 | * so they need to be linked and checked one by one. This is applied | |
102 | * to NMI too. | |
d334a491 | 103 | * |
81e88fdc HY |
104 | * RCU is used for these lists, so ghes_list_mutex is only used for |
105 | * list changing, not for traversing. | |
d334a491 HY |
106 | */ |
107 | static LIST_HEAD(ghes_sci); | |
7ad6e943 | 108 | static DEFINE_MUTEX(ghes_list_mutex); |
d334a491 | 109 | |
81e88fdc HY |
110 | /* |
111 | * Because the memory area used to transfer hardware error information | |
112 | * from BIOS to Linux can be determined only in NMI, IRQ or timer | |
113 | * handler, but general ioremap can not be used in atomic context, so | |
114 | * a special version of atomic ioremap is implemented for that. | |
115 | */ | |
116 | ||
117 | /* | |
594c7255 TN |
118 | * Two virtual pages are used, one for IRQ/PROCESS context, the other for |
119 | * NMI context (optionally). | |
81e88fdc | 120 | */ |
594c7255 | 121 | #define GHES_IOREMAP_PAGES 2 |
594c7255 TN |
122 | #define GHES_IOREMAP_IRQ_PAGE(base) (base) |
123 | #define GHES_IOREMAP_NMI_PAGE(base) ((base) + PAGE_SIZE) | |
81e88fdc HY |
124 | |
125 | /* virtual memory area for atomic ioremap */ | |
126 | static struct vm_struct *ghes_ioremap_area; | |
127 | /* | |
128 | * These 2 spinlock is used to prevent atomic ioremap virtual memory | |
129 | * area from being mapped simultaneously. | |
130 | */ | |
131 | static DEFINE_RAW_SPINLOCK(ghes_ioremap_lock_nmi); | |
132 | static DEFINE_SPINLOCK(ghes_ioremap_lock_irq); | |
133 | ||
67eb2e99 HY |
134 | static struct gen_pool *ghes_estatus_pool; |
135 | static unsigned long ghes_estatus_pool_size_request; | |
67eb2e99 | 136 | |
8f7c31f6 | 137 | static struct ghes_estatus_cache *ghes_estatus_caches[GHES_ESTATUS_CACHES_SIZE]; |
152cef40 HY |
138 | static atomic_t ghes_estatus_cache_alloced; |
139 | ||
652be8ea JZZ |
140 | static int ghes_panic_timeout __read_mostly = 30; |
141 | ||
81e88fdc HY |
142 | static int ghes_ioremap_init(void) |
143 | { | |
144 | ghes_ioremap_area = __get_vm_area(PAGE_SIZE * GHES_IOREMAP_PAGES, | |
145 | VM_IOREMAP, VMALLOC_START, VMALLOC_END); | |
146 | if (!ghes_ioremap_area) { | |
147 | pr_err(GHES_PFX "Failed to allocate virtual memory area for atomic ioremap.\n"); | |
148 | return -ENOMEM; | |
149 | } | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | static void ghes_ioremap_exit(void) | |
155 | { | |
156 | free_vm_area(ghes_ioremap_area); | |
157 | } | |
158 | ||
159 | static void __iomem *ghes_ioremap_pfn_nmi(u64 pfn) | |
160 | { | |
161 | unsigned long vaddr; | |
c46c9a74 TB |
162 | phys_addr_t paddr; |
163 | pgprot_t prot; | |
81e88fdc HY |
164 | |
165 | vaddr = (unsigned long)GHES_IOREMAP_NMI_PAGE(ghes_ioremap_area->addr); | |
c46c9a74 TB |
166 | |
167 | paddr = pfn << PAGE_SHIFT; | |
168 | prot = arch_apei_get_mem_attribute(paddr); | |
169 | ioremap_page_range(vaddr, vaddr + PAGE_SIZE, paddr, prot); | |
81e88fdc HY |
170 | |
171 | return (void __iomem *)vaddr; | |
172 | } | |
173 | ||
174 | static void __iomem *ghes_ioremap_pfn_irq(u64 pfn) | |
175 | { | |
8ece249a JZZ |
176 | unsigned long vaddr, paddr; |
177 | pgprot_t prot; | |
81e88fdc HY |
178 | |
179 | vaddr = (unsigned long)GHES_IOREMAP_IRQ_PAGE(ghes_ioremap_area->addr); | |
8ece249a JZZ |
180 | |
181 | paddr = pfn << PAGE_SHIFT; | |
182 | prot = arch_apei_get_mem_attribute(paddr); | |
183 | ||
184 | ioremap_page_range(vaddr, vaddr + PAGE_SIZE, paddr, prot); | |
81e88fdc HY |
185 | |
186 | return (void __iomem *)vaddr; | |
187 | } | |
188 | ||
189 | static void ghes_iounmap_nmi(void __iomem *vaddr_ptr) | |
190 | { | |
191 | unsigned long vaddr = (unsigned long __force)vaddr_ptr; | |
192 | void *base = ghes_ioremap_area->addr; | |
193 | ||
194 | BUG_ON(vaddr != (unsigned long)GHES_IOREMAP_NMI_PAGE(base)); | |
195 | unmap_kernel_range_noflush(vaddr, PAGE_SIZE); | |
594c7255 | 196 | arch_apei_flush_tlb_one(vaddr); |
81e88fdc HY |
197 | } |
198 | ||
199 | static void ghes_iounmap_irq(void __iomem *vaddr_ptr) | |
200 | { | |
201 | unsigned long vaddr = (unsigned long __force)vaddr_ptr; | |
202 | void *base = ghes_ioremap_area->addr; | |
203 | ||
204 | BUG_ON(vaddr != (unsigned long)GHES_IOREMAP_IRQ_PAGE(base)); | |
205 | unmap_kernel_range_noflush(vaddr, PAGE_SIZE); | |
594c7255 | 206 | arch_apei_flush_tlb_one(vaddr); |
81e88fdc HY |
207 | } |
208 | ||
67eb2e99 HY |
209 | static int ghes_estatus_pool_init(void) |
210 | { | |
211 | ghes_estatus_pool = gen_pool_create(GHES_ESTATUS_POOL_MIN_ALLOC_ORDER, -1); | |
212 | if (!ghes_estatus_pool) | |
213 | return -ENOMEM; | |
214 | return 0; | |
215 | } | |
216 | ||
217 | static void ghes_estatus_pool_free_chunk_page(struct gen_pool *pool, | |
218 | struct gen_pool_chunk *chunk, | |
219 | void *data) | |
220 | { | |
221 | free_page(chunk->start_addr); | |
222 | } | |
223 | ||
224 | static void ghes_estatus_pool_exit(void) | |
225 | { | |
226 | gen_pool_for_each_chunk(ghes_estatus_pool, | |
227 | ghes_estatus_pool_free_chunk_page, NULL); | |
228 | gen_pool_destroy(ghes_estatus_pool); | |
229 | } | |
230 | ||
231 | static int ghes_estatus_pool_expand(unsigned long len) | |
232 | { | |
233 | unsigned long i, pages, size, addr; | |
234 | int ret; | |
235 | ||
236 | ghes_estatus_pool_size_request += PAGE_ALIGN(len); | |
237 | size = gen_pool_size(ghes_estatus_pool); | |
238 | if (size >= ghes_estatus_pool_size_request) | |
239 | return 0; | |
240 | pages = (ghes_estatus_pool_size_request - size) / PAGE_SIZE; | |
241 | for (i = 0; i < pages; i++) { | |
242 | addr = __get_free_page(GFP_KERNEL); | |
243 | if (!addr) | |
244 | return -ENOMEM; | |
245 | ret = gen_pool_add(ghes_estatus_pool, addr, PAGE_SIZE, -1); | |
246 | if (ret) | |
247 | return ret; | |
248 | } | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
87400177 TB |
253 | static int map_gen_v2(struct ghes *ghes) |
254 | { | |
255 | return apei_map_generic_address(&ghes->generic_v2->read_ack_register); | |
256 | } | |
257 | ||
258 | static void unmap_gen_v2(struct ghes *ghes) | |
259 | { | |
260 | apei_unmap_generic_address(&ghes->generic_v2->read_ack_register); | |
261 | } | |
262 | ||
d334a491 HY |
263 | static struct ghes *ghes_new(struct acpi_hest_generic *generic) |
264 | { | |
265 | struct ghes *ghes; | |
266 | unsigned int error_block_length; | |
267 | int rc; | |
268 | ||
269 | ghes = kzalloc(sizeof(*ghes), GFP_KERNEL); | |
270 | if (!ghes) | |
271 | return ERR_PTR(-ENOMEM); | |
87400177 | 272 | |
d334a491 | 273 | ghes->generic = generic; |
87400177 TB |
274 | if (is_hest_type_generic_v2(ghes)) { |
275 | rc = map_gen_v2(ghes); | |
276 | if (rc) | |
277 | goto err_free; | |
278 | } | |
279 | ||
34ddeb03 | 280 | rc = apei_map_generic_address(&generic->error_status_address); |
d334a491 | 281 | if (rc) |
87400177 | 282 | goto err_unmap_read_ack_addr; |
d334a491 HY |
283 | error_block_length = generic->error_block_length; |
284 | if (error_block_length > GHES_ESTATUS_MAX_SIZE) { | |
285 | pr_warning(FW_WARN GHES_PFX | |
286 | "Error status block length is too long: %u for " | |
287 | "generic hardware error source: %d.\n", | |
288 | error_block_length, generic->header.source_id); | |
289 | error_block_length = GHES_ESTATUS_MAX_SIZE; | |
290 | } | |
291 | ghes->estatus = kmalloc(error_block_length, GFP_KERNEL); | |
292 | if (!ghes->estatus) { | |
293 | rc = -ENOMEM; | |
87400177 | 294 | goto err_unmap_status_addr; |
d334a491 HY |
295 | } |
296 | ||
297 | return ghes; | |
298 | ||
87400177 | 299 | err_unmap_status_addr: |
34ddeb03 | 300 | apei_unmap_generic_address(&generic->error_status_address); |
87400177 TB |
301 | err_unmap_read_ack_addr: |
302 | if (is_hest_type_generic_v2(ghes)) | |
303 | unmap_gen_v2(ghes); | |
d334a491 HY |
304 | err_free: |
305 | kfree(ghes); | |
306 | return ERR_PTR(rc); | |
307 | } | |
308 | ||
309 | static void ghes_fini(struct ghes *ghes) | |
310 | { | |
311 | kfree(ghes->estatus); | |
34ddeb03 | 312 | apei_unmap_generic_address(&ghes->generic->error_status_address); |
87400177 TB |
313 | if (is_hest_type_generic_v2(ghes)) |
314 | unmap_gen_v2(ghes); | |
d334a491 HY |
315 | } |
316 | ||
d334a491 HY |
317 | static inline int ghes_severity(int severity) |
318 | { | |
319 | switch (severity) { | |
ad4ecef2 HY |
320 | case CPER_SEV_INFORMATIONAL: |
321 | return GHES_SEV_NO; | |
322 | case CPER_SEV_CORRECTED: | |
323 | return GHES_SEV_CORRECTED; | |
324 | case CPER_SEV_RECOVERABLE: | |
325 | return GHES_SEV_RECOVERABLE; | |
326 | case CPER_SEV_FATAL: | |
327 | return GHES_SEV_PANIC; | |
d334a491 | 328 | default: |
25985edc | 329 | /* Unknown, go panic */ |
ad4ecef2 | 330 | return GHES_SEV_PANIC; |
d334a491 HY |
331 | } |
332 | } | |
333 | ||
81e88fdc HY |
334 | static void ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len, |
335 | int from_phys) | |
d334a491 | 336 | { |
81e88fdc HY |
337 | void __iomem *vaddr; |
338 | unsigned long flags = 0; | |
339 | int in_nmi = in_nmi(); | |
340 | u64 offset; | |
341 | u32 trunk; | |
342 | ||
343 | while (len > 0) { | |
344 | offset = paddr - (paddr & PAGE_MASK); | |
345 | if (in_nmi) { | |
346 | raw_spin_lock(&ghes_ioremap_lock_nmi); | |
347 | vaddr = ghes_ioremap_pfn_nmi(paddr >> PAGE_SHIFT); | |
348 | } else { | |
349 | spin_lock_irqsave(&ghes_ioremap_lock_irq, flags); | |
350 | vaddr = ghes_ioremap_pfn_irq(paddr >> PAGE_SHIFT); | |
351 | } | |
352 | trunk = PAGE_SIZE - offset; | |
353 | trunk = min(trunk, len); | |
354 | if (from_phys) | |
355 | memcpy_fromio(buffer, vaddr + offset, trunk); | |
356 | else | |
357 | memcpy_toio(vaddr + offset, buffer, trunk); | |
358 | len -= trunk; | |
359 | paddr += trunk; | |
360 | buffer += trunk; | |
361 | if (in_nmi) { | |
362 | ghes_iounmap_nmi(vaddr); | |
363 | raw_spin_unlock(&ghes_ioremap_lock_nmi); | |
364 | } else { | |
365 | ghes_iounmap_irq(vaddr); | |
366 | spin_unlock_irqrestore(&ghes_ioremap_lock_irq, flags); | |
367 | } | |
368 | } | |
d334a491 HY |
369 | } |
370 | ||
371 | static int ghes_read_estatus(struct ghes *ghes, int silent) | |
372 | { | |
373 | struct acpi_hest_generic *g = ghes->generic; | |
374 | u64 buf_paddr; | |
375 | u32 len; | |
376 | int rc; | |
377 | ||
700130b4 | 378 | rc = apei_read(&buf_paddr, &g->error_status_address); |
d334a491 HY |
379 | if (rc) { |
380 | if (!silent && printk_ratelimit()) | |
381 | pr_warning(FW_WARN GHES_PFX | |
382 | "Failed to read error status block address for hardware error source: %d.\n", | |
383 | g->header.source_id); | |
384 | return -EIO; | |
385 | } | |
386 | if (!buf_paddr) | |
387 | return -ENOENT; | |
388 | ||
81e88fdc HY |
389 | ghes_copy_tofrom_phys(ghes->estatus, buf_paddr, |
390 | sizeof(*ghes->estatus), 1); | |
d334a491 HY |
391 | if (!ghes->estatus->block_status) |
392 | return -ENOENT; | |
393 | ||
394 | ghes->buffer_paddr = buf_paddr; | |
395 | ghes->flags |= GHES_TO_CLEAR; | |
396 | ||
397 | rc = -EIO; | |
88f074f4 | 398 | len = cper_estatus_len(ghes->estatus); |
d334a491 HY |
399 | if (len < sizeof(*ghes->estatus)) |
400 | goto err_read_block; | |
401 | if (len > ghes->generic->error_block_length) | |
402 | goto err_read_block; | |
88f074f4 | 403 | if (cper_estatus_check_header(ghes->estatus)) |
d334a491 | 404 | goto err_read_block; |
81e88fdc HY |
405 | ghes_copy_tofrom_phys(ghes->estatus + 1, |
406 | buf_paddr + sizeof(*ghes->estatus), | |
407 | len - sizeof(*ghes->estatus), 1); | |
88f074f4 | 408 | if (cper_estatus_check(ghes->estatus)) |
d334a491 HY |
409 | goto err_read_block; |
410 | rc = 0; | |
411 | ||
412 | err_read_block: | |
81e88fdc | 413 | if (rc && !silent && printk_ratelimit()) |
d334a491 HY |
414 | pr_warning(FW_WARN GHES_PFX |
415 | "Failed to read error status block!\n"); | |
416 | return rc; | |
417 | } | |
418 | ||
419 | static void ghes_clear_estatus(struct ghes *ghes) | |
420 | { | |
421 | ghes->estatus->block_status = 0; | |
422 | if (!(ghes->flags & GHES_TO_CLEAR)) | |
423 | return; | |
424 | ghes_copy_tofrom_phys(ghes->estatus, ghes->buffer_paddr, | |
425 | sizeof(ghes->estatus->block_status), 0); | |
426 | ghes->flags &= ~GHES_TO_CLEAR; | |
427 | } | |
428 | ||
0a00fd5e | 429 | static void ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, int sev) |
cf870c70 NR |
430 | { |
431 | #ifdef CONFIG_ACPI_APEI_MEMORY_FAILURE | |
432 | unsigned long pfn; | |
ca104edc | 433 | int flags = -1; |
cf870c70 | 434 | int sec_sev = ghes_severity(gdata->error_severity); |
244af8fc | 435 | struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata); |
cf870c70 | 436 | |
ca104edc CG |
437 | if (!(mem_err->validation_bits & CPER_MEM_VALID_PA)) |
438 | return; | |
439 | ||
440 | pfn = mem_err->physical_addr >> PAGE_SHIFT; | |
441 | if (!pfn_valid(pfn)) { | |
442 | pr_warn_ratelimited(FW_WARN GHES_PFX | |
443 | "Invalid address in generic error data: %#llx\n", | |
444 | mem_err->physical_addr); | |
445 | return; | |
cf870c70 | 446 | } |
ca104edc CG |
447 | |
448 | /* iff following two events can be handled properly by now */ | |
449 | if (sec_sev == GHES_SEV_CORRECTED && | |
450 | (gdata->flags & CPER_SEC_ERROR_THRESHOLD_EXCEEDED)) | |
451 | flags = MF_SOFT_OFFLINE; | |
452 | if (sev == GHES_SEV_RECOVERABLE && sec_sev == GHES_SEV_RECOVERABLE) | |
453 | flags = 0; | |
454 | ||
455 | if (flags != -1) | |
456 | memory_failure_queue(pfn, 0, flags); | |
cf870c70 NR |
457 | #endif |
458 | } | |
459 | ||
21480547 | 460 | static void ghes_do_proc(struct ghes *ghes, |
0a00fd5e | 461 | const struct acpi_hest_generic_status *estatus) |
d334a491 | 462 | { |
ba61ca4a | 463 | int sev, sec_sev; |
0a00fd5e | 464 | struct acpi_hest_generic_data *gdata; |
67e3bd66 TB |
465 | uuid_le sec_type; |
466 | uuid_le *fru_id = &NULL_UUID_LE; | |
467 | char *fru_text = ""; | |
d334a491 | 468 | |
67eb2e99 HY |
469 | sev = ghes_severity(estatus->error_severity); |
470 | apei_estatus_for_each_section(estatus, gdata) { | |
ba61ca4a | 471 | sec_sev = ghes_severity(gdata->error_severity); |
67e3bd66 TB |
472 | sec_type = *(uuid_le *)gdata->section_type; |
473 | ||
474 | if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID) | |
475 | fru_id = (uuid_le *)gdata->fru_id; | |
476 | ||
477 | if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT) | |
478 | fru_text = gdata->fru_text; | |
479 | ||
d334a491 HY |
480 | if (!uuid_le_cmp(*(uuid_le *)gdata->section_type, |
481 | CPER_SEC_PLATFORM_MEM)) { | |
244af8fc TB |
482 | struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata); |
483 | ||
21480547 MCC |
484 | ghes_edac_report_mem_error(ghes, sev, mem_err); |
485 | ||
9dae3d0d | 486 | arch_apei_report_mem_error(sev, mem_err); |
cf870c70 | 487 | ghes_handle_memory_failure(gdata, sev); |
ba61ca4a | 488 | } |
a654e5ee HY |
489 | #ifdef CONFIG_ACPI_APEI_PCIEAER |
490 | else if (!uuid_le_cmp(*(uuid_le *)gdata->section_type, | |
491 | CPER_SEC_PCIE)) { | |
244af8fc TB |
492 | struct cper_sec_pcie *pcie_err = acpi_hest_get_payload(gdata); |
493 | ||
a654e5ee HY |
494 | if (sev == GHES_SEV_RECOVERABLE && |
495 | sec_sev == GHES_SEV_RECOVERABLE && | |
496 | pcie_err->validation_bits & CPER_PCIE_VALID_DEVICE_ID && | |
497 | pcie_err->validation_bits & CPER_PCIE_VALID_AER_INFO) { | |
498 | unsigned int devfn; | |
499 | int aer_severity; | |
0ba98ec9 | 500 | |
a654e5ee HY |
501 | devfn = PCI_DEVFN(pcie_err->device_id.device, |
502 | pcie_err->device_id.function); | |
2458d66b | 503 | aer_severity = cper_severity_to_aer(gdata->error_severity); |
0ba98ec9 BD |
504 | |
505 | /* | |
506 | * If firmware reset the component to contain | |
507 | * the error, we must reinitialize it before | |
508 | * use, so treat it as a fatal AER error. | |
509 | */ | |
510 | if (gdata->flags & CPER_SEC_RESET) | |
511 | aer_severity = AER_FATAL; | |
512 | ||
a654e5ee HY |
513 | aer_recover_queue(pcie_err->device_id.segment, |
514 | pcie_err->device_id.bus, | |
37448adf LO |
515 | devfn, aer_severity, |
516 | (struct aer_capability_regs *) | |
517 | pcie_err->aer_info); | |
a654e5ee HY |
518 | } |
519 | ||
520 | } | |
521 | #endif | |
8fd366fb TB |
522 | else if (!uuid_le_cmp(sec_type, CPER_SEC_PROC_ARM)) { |
523 | struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata); | |
524 | ||
525 | log_arm_hw_error(err); | |
526 | } else { | |
67e3bd66 TB |
527 | void *err = acpi_hest_get_payload(gdata); |
528 | ||
529 | log_non_standard_event(&sec_type, fru_id, fru_text, | |
530 | sec_sev, err, | |
531 | gdata->error_data_length); | |
532 | } | |
d334a491 | 533 | } |
32c361f5 | 534 | } |
d334a491 | 535 | |
67eb2e99 HY |
536 | static void __ghes_print_estatus(const char *pfx, |
537 | const struct acpi_hest_generic *generic, | |
0a00fd5e | 538 | const struct acpi_hest_generic_status *estatus) |
32c361f5 | 539 | { |
5ba82ab5 HY |
540 | static atomic_t seqno; |
541 | unsigned int curr_seqno; | |
542 | char pfx_seq[64]; | |
543 | ||
32c361f5 | 544 | if (pfx == NULL) { |
67eb2e99 | 545 | if (ghes_severity(estatus->error_severity) <= |
32c361f5 | 546 | GHES_SEV_CORRECTED) |
5ba82ab5 | 547 | pfx = KERN_WARNING; |
32c361f5 | 548 | else |
5ba82ab5 | 549 | pfx = KERN_ERR; |
32c361f5 | 550 | } |
5ba82ab5 HY |
551 | curr_seqno = atomic_inc_return(&seqno); |
552 | snprintf(pfx_seq, sizeof(pfx_seq), "%s{%u}" HW_ERR, pfx, curr_seqno); | |
5588340d | 553 | printk("%s""Hardware error from APEI Generic Hardware Error Source: %d\n", |
5ba82ab5 | 554 | pfx_seq, generic->header.source_id); |
88f074f4 | 555 | cper_estatus_print(pfx_seq, estatus); |
5588340d HY |
556 | } |
557 | ||
152cef40 HY |
558 | static int ghes_print_estatus(const char *pfx, |
559 | const struct acpi_hest_generic *generic, | |
0a00fd5e | 560 | const struct acpi_hest_generic_status *estatus) |
5588340d HY |
561 | { |
562 | /* Not more than 2 messages every 5 seconds */ | |
67eb2e99 HY |
563 | static DEFINE_RATELIMIT_STATE(ratelimit_corrected, 5*HZ, 2); |
564 | static DEFINE_RATELIMIT_STATE(ratelimit_uncorrected, 5*HZ, 2); | |
565 | struct ratelimit_state *ratelimit; | |
5588340d | 566 | |
67eb2e99 HY |
567 | if (ghes_severity(estatus->error_severity) <= GHES_SEV_CORRECTED) |
568 | ratelimit = &ratelimit_corrected; | |
569 | else | |
570 | ratelimit = &ratelimit_uncorrected; | |
152cef40 | 571 | if (__ratelimit(ratelimit)) { |
67eb2e99 | 572 | __ghes_print_estatus(pfx, generic, estatus); |
152cef40 HY |
573 | return 1; |
574 | } | |
575 | return 0; | |
576 | } | |
577 | ||
578 | /* | |
579 | * GHES error status reporting throttle, to report more kinds of | |
580 | * errors, instead of just most frequently occurred errors. | |
581 | */ | |
0a00fd5e | 582 | static int ghes_estatus_cached(struct acpi_hest_generic_status *estatus) |
152cef40 HY |
583 | { |
584 | u32 len; | |
585 | int i, cached = 0; | |
586 | unsigned long long now; | |
587 | struct ghes_estatus_cache *cache; | |
0a00fd5e | 588 | struct acpi_hest_generic_status *cache_estatus; |
152cef40 | 589 | |
88f074f4 | 590 | len = cper_estatus_len(estatus); |
152cef40 HY |
591 | rcu_read_lock(); |
592 | for (i = 0; i < GHES_ESTATUS_CACHES_SIZE; i++) { | |
593 | cache = rcu_dereference(ghes_estatus_caches[i]); | |
594 | if (cache == NULL) | |
595 | continue; | |
596 | if (len != cache->estatus_len) | |
597 | continue; | |
598 | cache_estatus = GHES_ESTATUS_FROM_CACHE(cache); | |
599 | if (memcmp(estatus, cache_estatus, len)) | |
600 | continue; | |
601 | atomic_inc(&cache->count); | |
602 | now = sched_clock(); | |
603 | if (now - cache->time_in < GHES_ESTATUS_IN_CACHE_MAX_NSEC) | |
604 | cached = 1; | |
605 | break; | |
606 | } | |
607 | rcu_read_unlock(); | |
608 | return cached; | |
609 | } | |
610 | ||
611 | static struct ghes_estatus_cache *ghes_estatus_cache_alloc( | |
612 | struct acpi_hest_generic *generic, | |
0a00fd5e | 613 | struct acpi_hest_generic_status *estatus) |
152cef40 HY |
614 | { |
615 | int alloced; | |
616 | u32 len, cache_len; | |
617 | struct ghes_estatus_cache *cache; | |
0a00fd5e | 618 | struct acpi_hest_generic_status *cache_estatus; |
152cef40 HY |
619 | |
620 | alloced = atomic_add_return(1, &ghes_estatus_cache_alloced); | |
621 | if (alloced > GHES_ESTATUS_CACHE_ALLOCED_MAX) { | |
622 | atomic_dec(&ghes_estatus_cache_alloced); | |
623 | return NULL; | |
624 | } | |
88f074f4 | 625 | len = cper_estatus_len(estatus); |
152cef40 HY |
626 | cache_len = GHES_ESTATUS_CACHE_LEN(len); |
627 | cache = (void *)gen_pool_alloc(ghes_estatus_pool, cache_len); | |
628 | if (!cache) { | |
629 | atomic_dec(&ghes_estatus_cache_alloced); | |
630 | return NULL; | |
631 | } | |
632 | cache_estatus = GHES_ESTATUS_FROM_CACHE(cache); | |
633 | memcpy(cache_estatus, estatus, len); | |
634 | cache->estatus_len = len; | |
635 | atomic_set(&cache->count, 0); | |
636 | cache->generic = generic; | |
637 | cache->time_in = sched_clock(); | |
638 | return cache; | |
639 | } | |
640 | ||
641 | static void ghes_estatus_cache_free(struct ghes_estatus_cache *cache) | |
642 | { | |
643 | u32 len; | |
644 | ||
88f074f4 | 645 | len = cper_estatus_len(GHES_ESTATUS_FROM_CACHE(cache)); |
152cef40 HY |
646 | len = GHES_ESTATUS_CACHE_LEN(len); |
647 | gen_pool_free(ghes_estatus_pool, (unsigned long)cache, len); | |
648 | atomic_dec(&ghes_estatus_cache_alloced); | |
649 | } | |
650 | ||
651 | static void ghes_estatus_cache_rcu_free(struct rcu_head *head) | |
652 | { | |
653 | struct ghes_estatus_cache *cache; | |
654 | ||
655 | cache = container_of(head, struct ghes_estatus_cache, rcu); | |
656 | ghes_estatus_cache_free(cache); | |
657 | } | |
658 | ||
659 | static void ghes_estatus_cache_add( | |
660 | struct acpi_hest_generic *generic, | |
0a00fd5e | 661 | struct acpi_hest_generic_status *estatus) |
152cef40 HY |
662 | { |
663 | int i, slot = -1, count; | |
664 | unsigned long long now, duration, period, max_period = 0; | |
665 | struct ghes_estatus_cache *cache, *slot_cache = NULL, *new_cache; | |
666 | ||
667 | new_cache = ghes_estatus_cache_alloc(generic, estatus); | |
668 | if (new_cache == NULL) | |
669 | return; | |
670 | rcu_read_lock(); | |
671 | now = sched_clock(); | |
672 | for (i = 0; i < GHES_ESTATUS_CACHES_SIZE; i++) { | |
673 | cache = rcu_dereference(ghes_estatus_caches[i]); | |
674 | if (cache == NULL) { | |
675 | slot = i; | |
676 | slot_cache = NULL; | |
677 | break; | |
678 | } | |
679 | duration = now - cache->time_in; | |
680 | if (duration >= GHES_ESTATUS_IN_CACHE_MAX_NSEC) { | |
681 | slot = i; | |
682 | slot_cache = cache; | |
683 | break; | |
684 | } | |
685 | count = atomic_read(&cache->count); | |
70cb6e1d LB |
686 | period = duration; |
687 | do_div(period, (count + 1)); | |
152cef40 HY |
688 | if (period > max_period) { |
689 | max_period = period; | |
690 | slot = i; | |
691 | slot_cache = cache; | |
692 | } | |
693 | } | |
694 | /* new_cache must be put into array after its contents are written */ | |
695 | smp_wmb(); | |
696 | if (slot != -1 && cmpxchg(ghes_estatus_caches + slot, | |
697 | slot_cache, new_cache) == slot_cache) { | |
698 | if (slot_cache) | |
699 | call_rcu(&slot_cache->rcu, ghes_estatus_cache_rcu_free); | |
700 | } else | |
701 | ghes_estatus_cache_free(new_cache); | |
702 | rcu_read_unlock(); | |
d334a491 HY |
703 | } |
704 | ||
87400177 TB |
705 | static int ghes_ack_error(struct acpi_hest_generic_v2 *gv2) |
706 | { | |
707 | int rc; | |
708 | u64 val = 0; | |
709 | ||
710 | rc = apei_read(&val, &gv2->read_ack_register); | |
711 | if (rc) | |
712 | return rc; | |
713 | ||
714 | val &= gv2->read_ack_preserve << gv2->read_ack_register.bit_offset; | |
715 | val |= gv2->read_ack_write << gv2->read_ack_register.bit_offset; | |
716 | ||
717 | return apei_write(val, &gv2->read_ack_register); | |
718 | } | |
719 | ||
652be8ea JZZ |
720 | static void __ghes_panic(struct ghes *ghes) |
721 | { | |
722 | __ghes_print_estatus(KERN_EMERG, ghes->generic, ghes->estatus); | |
723 | ||
724 | /* reboot to log the error! */ | |
725 | if (!panic_timeout) | |
726 | panic_timeout = ghes_panic_timeout; | |
727 | panic("Fatal hardware error!"); | |
728 | } | |
729 | ||
d334a491 HY |
730 | static int ghes_proc(struct ghes *ghes) |
731 | { | |
732 | int rc; | |
733 | ||
734 | rc = ghes_read_estatus(ghes, 0); | |
735 | if (rc) | |
736 | goto out; | |
652be8ea JZZ |
737 | |
738 | if (ghes_severity(ghes->estatus->error_severity) >= GHES_SEV_PANIC) { | |
739 | __ghes_panic(ghes); | |
740 | } | |
741 | ||
152cef40 HY |
742 | if (!ghes_estatus_cached(ghes->estatus)) { |
743 | if (ghes_print_estatus(NULL, ghes->generic, ghes->estatus)) | |
744 | ghes_estatus_cache_add(ghes->generic, ghes->estatus); | |
745 | } | |
21480547 | 746 | ghes_do_proc(ghes, ghes->estatus); |
87400177 TB |
747 | |
748 | /* | |
749 | * GHESv2 type HEST entries introduce support for error acknowledgment, | |
750 | * so only acknowledge the error if this support is present. | |
751 | */ | |
752 | if (is_hest_type_generic_v2(ghes)) { | |
753 | rc = ghes_ack_error(ghes->generic_v2); | |
754 | if (rc) | |
755 | return rc; | |
756 | } | |
d334a491 HY |
757 | out: |
758 | ghes_clear_estatus(ghes); | |
806487a8 | 759 | return rc; |
d334a491 HY |
760 | } |
761 | ||
81e88fdc HY |
762 | static void ghes_add_timer(struct ghes *ghes) |
763 | { | |
764 | struct acpi_hest_generic *g = ghes->generic; | |
765 | unsigned long expire; | |
766 | ||
767 | if (!g->notify.poll_interval) { | |
768 | pr_warning(FW_WARN GHES_PFX "Poll interval is 0 for generic hardware error source: %d, disabled.\n", | |
769 | g->header.source_id); | |
770 | return; | |
771 | } | |
772 | expire = jiffies + msecs_to_jiffies(g->notify.poll_interval); | |
773 | ghes->timer.expires = round_jiffies_relative(expire); | |
774 | add_timer(&ghes->timer); | |
775 | } | |
776 | ||
777 | static void ghes_poll_func(unsigned long data) | |
778 | { | |
779 | struct ghes *ghes = (void *)data; | |
780 | ||
781 | ghes_proc(ghes); | |
782 | if (!(ghes->flags & GHES_EXITING)) | |
783 | ghes_add_timer(ghes); | |
784 | } | |
785 | ||
786 | static irqreturn_t ghes_irq_func(int irq, void *data) | |
787 | { | |
788 | struct ghes *ghes = data; | |
789 | int rc; | |
790 | ||
791 | rc = ghes_proc(ghes); | |
792 | if (rc) | |
793 | return IRQ_NONE; | |
794 | ||
795 | return IRQ_HANDLED; | |
796 | } | |
797 | ||
d334a491 HY |
798 | static int ghes_notify_sci(struct notifier_block *this, |
799 | unsigned long event, void *data) | |
800 | { | |
801 | struct ghes *ghes; | |
802 | int ret = NOTIFY_DONE; | |
803 | ||
804 | rcu_read_lock(); | |
805 | list_for_each_entry_rcu(ghes, &ghes_sci, list) { | |
806 | if (!ghes_proc(ghes)) | |
807 | ret = NOTIFY_OK; | |
808 | } | |
809 | rcu_read_unlock(); | |
810 | ||
811 | return ret; | |
812 | } | |
813 | ||
44a69f61 TN |
814 | static struct notifier_block ghes_notifier_sci = { |
815 | .notifier_call = ghes_notify_sci, | |
816 | }; | |
817 | ||
c46c9a74 TB |
818 | #ifdef CONFIG_ACPI_APEI_SEA |
819 | static LIST_HEAD(ghes_sea); | |
820 | ||
821 | void ghes_notify_sea(void) | |
822 | { | |
823 | struct ghes *ghes; | |
824 | ||
825 | /* | |
826 | * synchronize_rcu() will wait for nmi_exit(), so no need to | |
827 | * rcu_read_lock(). | |
828 | */ | |
829 | list_for_each_entry_rcu(ghes, &ghes_sea, list) { | |
830 | ghes_proc(ghes); | |
831 | } | |
832 | } | |
833 | ||
834 | static void ghes_sea_add(struct ghes *ghes) | |
835 | { | |
836 | mutex_lock(&ghes_list_mutex); | |
837 | list_add_rcu(&ghes->list, &ghes_sea); | |
838 | mutex_unlock(&ghes_list_mutex); | |
839 | } | |
840 | ||
841 | static void ghes_sea_remove(struct ghes *ghes) | |
842 | { | |
843 | mutex_lock(&ghes_list_mutex); | |
844 | list_del_rcu(&ghes->list); | |
845 | mutex_unlock(&ghes_list_mutex); | |
846 | synchronize_rcu(); | |
847 | } | |
848 | #else /* CONFIG_ACPI_APEI_SEA */ | |
849 | static inline void ghes_sea_add(struct ghes *ghes) | |
850 | { | |
851 | pr_err(GHES_PFX "ID: %d, trying to add SEA notification which is not supported\n", | |
852 | ghes->generic->header.source_id); | |
853 | } | |
854 | ||
855 | static inline void ghes_sea_remove(struct ghes *ghes) | |
856 | { | |
857 | pr_err(GHES_PFX "ID: %d, trying to remove SEA notification which is not supported\n", | |
858 | ghes->generic->header.source_id); | |
859 | } | |
860 | #endif /* CONFIG_ACPI_APEI_SEA */ | |
861 | ||
44a69f61 TN |
862 | #ifdef CONFIG_HAVE_ACPI_APEI_NMI |
863 | /* | |
864 | * printk is not safe in NMI context. So in NMI handler, we allocate | |
865 | * required memory from lock-less memory allocator | |
866 | * (ghes_estatus_pool), save estatus into it, put them into lock-less | |
867 | * list (ghes_estatus_llist), then delay printk into IRQ context via | |
868 | * irq_work (ghes_proc_irq_work). ghes_estatus_size_request record | |
869 | * required pool size by all NMI error source. | |
870 | */ | |
871 | static struct llist_head ghes_estatus_llist; | |
872 | static struct irq_work ghes_proc_irq_work; | |
873 | ||
874 | /* | |
6fe9e7c2 JK |
875 | * NMI may be triggered on any CPU, so ghes_in_nmi is used for |
876 | * having only one concurrent reader. | |
44a69f61 | 877 | */ |
6fe9e7c2 | 878 | static atomic_t ghes_in_nmi = ATOMIC_INIT(0); |
44a69f61 TN |
879 | |
880 | static LIST_HEAD(ghes_nmi); | |
881 | ||
67eb2e99 HY |
882 | static void ghes_proc_in_irq(struct irq_work *irq_work) |
883 | { | |
46d12f0b | 884 | struct llist_node *llnode, *next; |
67eb2e99 | 885 | struct ghes_estatus_node *estatus_node; |
152cef40 | 886 | struct acpi_hest_generic *generic; |
0a00fd5e | 887 | struct acpi_hest_generic_status *estatus; |
67eb2e99 HY |
888 | u32 len, node_len; |
889 | ||
46d12f0b | 890 | llnode = llist_del_all(&ghes_estatus_llist); |
67eb2e99 HY |
891 | /* |
892 | * Because the time order of estatus in list is reversed, | |
893 | * revert it back to proper order. | |
894 | */ | |
8d21d4c9 | 895 | llnode = llist_reverse_order(llnode); |
67eb2e99 HY |
896 | while (llnode) { |
897 | next = llnode->next; | |
898 | estatus_node = llist_entry(llnode, struct ghes_estatus_node, | |
899 | llnode); | |
900 | estatus = GHES_ESTATUS_FROM_NODE(estatus_node); | |
88f074f4 | 901 | len = cper_estatus_len(estatus); |
67eb2e99 | 902 | node_len = GHES_ESTATUS_NODE_LEN(len); |
21480547 | 903 | ghes_do_proc(estatus_node->ghes, estatus); |
152cef40 HY |
904 | if (!ghes_estatus_cached(estatus)) { |
905 | generic = estatus_node->generic; | |
906 | if (ghes_print_estatus(NULL, generic, estatus)) | |
907 | ghes_estatus_cache_add(generic, estatus); | |
908 | } | |
67eb2e99 HY |
909 | gen_pool_free(ghes_estatus_pool, (unsigned long)estatus_node, |
910 | node_len); | |
911 | llnode = next; | |
912 | } | |
913 | } | |
914 | ||
46d12f0b HY |
915 | static void ghes_print_queued_estatus(void) |
916 | { | |
917 | struct llist_node *llnode; | |
918 | struct ghes_estatus_node *estatus_node; | |
919 | struct acpi_hest_generic *generic; | |
0a00fd5e | 920 | struct acpi_hest_generic_status *estatus; |
46d12f0b HY |
921 | u32 len, node_len; |
922 | ||
923 | llnode = llist_del_all(&ghes_estatus_llist); | |
924 | /* | |
925 | * Because the time order of estatus in list is reversed, | |
926 | * revert it back to proper order. | |
927 | */ | |
8d21d4c9 | 928 | llnode = llist_reverse_order(llnode); |
46d12f0b HY |
929 | while (llnode) { |
930 | estatus_node = llist_entry(llnode, struct ghes_estatus_node, | |
931 | llnode); | |
932 | estatus = GHES_ESTATUS_FROM_NODE(estatus_node); | |
88f074f4 | 933 | len = cper_estatus_len(estatus); |
46d12f0b HY |
934 | node_len = GHES_ESTATUS_NODE_LEN(len); |
935 | generic = estatus_node->generic; | |
936 | ghes_print_estatus(NULL, generic, estatus); | |
937 | llnode = llnode->next; | |
938 | } | |
939 | } | |
940 | ||
11568496 BP |
941 | /* Save estatus for further processing in IRQ context */ |
942 | static void __process_error(struct ghes *ghes) | |
943 | { | |
944 | #ifdef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG | |
945 | u32 len, node_len; | |
946 | struct ghes_estatus_node *estatus_node; | |
947 | struct acpi_hest_generic_status *estatus; | |
948 | ||
949 | if (ghes_estatus_cached(ghes->estatus)) | |
950 | return; | |
951 | ||
952 | len = cper_estatus_len(ghes->estatus); | |
953 | node_len = GHES_ESTATUS_NODE_LEN(len); | |
954 | ||
955 | estatus_node = (void *)gen_pool_alloc(ghes_estatus_pool, node_len); | |
956 | if (!estatus_node) | |
957 | return; | |
958 | ||
959 | estatus_node->ghes = ghes; | |
960 | estatus_node->generic = ghes->generic; | |
961 | estatus = GHES_ESTATUS_FROM_NODE(estatus_node); | |
962 | memcpy(estatus, ghes->estatus, len); | |
963 | llist_add(&estatus_node->llnode, &ghes_estatus_llist); | |
964 | #endif | |
965 | } | |
966 | ||
9c48f1c6 | 967 | static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs) |
81e88fdc | 968 | { |
6169ddf8 BP |
969 | struct ghes *ghes; |
970 | int sev, ret = NMI_DONE; | |
81e88fdc | 971 | |
6fe9e7c2 JK |
972 | if (!atomic_add_unless(&ghes_in_nmi, 1, 1)) |
973 | return ret; | |
974 | ||
81e88fdc HY |
975 | list_for_each_entry_rcu(ghes, &ghes_nmi, list) { |
976 | if (ghes_read_estatus(ghes, 1)) { | |
977 | ghes_clear_estatus(ghes); | |
978 | continue; | |
a545715d PB |
979 | } else { |
980 | ret = NMI_HANDLED; | |
81e88fdc | 981 | } |
6169ddf8 | 982 | |
81e88fdc | 983 | sev = ghes_severity(ghes->estatus->error_severity); |
652be8ea JZZ |
984 | if (sev >= GHES_SEV_PANIC) { |
985 | oops_begin(); | |
986 | ghes_print_queued_estatus(); | |
6169ddf8 | 987 | __ghes_panic(ghes); |
652be8ea | 988 | } |
6169ddf8 | 989 | |
81e88fdc HY |
990 | if (!(ghes->flags & GHES_TO_CLEAR)) |
991 | continue; | |
11568496 BP |
992 | |
993 | __process_error(ghes); | |
81e88fdc HY |
994 | ghes_clear_estatus(ghes); |
995 | } | |
11568496 | 996 | |
67eb2e99 | 997 | #ifdef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG |
a545715d PB |
998 | if (ret == NMI_HANDLED) |
999 | irq_work_queue(&ghes_proc_irq_work); | |
67eb2e99 | 1000 | #endif |
6fe9e7c2 | 1001 | atomic_dec(&ghes_in_nmi); |
81e88fdc HY |
1002 | return ret; |
1003 | } | |
1004 | ||
67eb2e99 HY |
1005 | static unsigned long ghes_esource_prealloc_size( |
1006 | const struct acpi_hest_generic *generic) | |
1007 | { | |
1008 | unsigned long block_length, prealloc_records, prealloc_size; | |
1009 | ||
1010 | block_length = min_t(unsigned long, generic->error_block_length, | |
1011 | GHES_ESTATUS_MAX_SIZE); | |
1012 | prealloc_records = max_t(unsigned long, | |
1013 | generic->records_to_preallocate, 1); | |
1014 | prealloc_size = min_t(unsigned long, block_length * prealloc_records, | |
1015 | GHES_ESOURCE_PREALLOC_MAX_SIZE); | |
1016 | ||
1017 | return prealloc_size; | |
1018 | } | |
1019 | ||
44a69f61 TN |
1020 | static void ghes_estatus_pool_shrink(unsigned long len) |
1021 | { | |
1022 | ghes_estatus_pool_size_request -= PAGE_ALIGN(len); | |
1023 | } | |
1024 | ||
1025 | static void ghes_nmi_add(struct ghes *ghes) | |
1026 | { | |
1027 | unsigned long len; | |
1028 | ||
1029 | len = ghes_esource_prealloc_size(ghes->generic); | |
1030 | ghes_estatus_pool_expand(len); | |
1031 | mutex_lock(&ghes_list_mutex); | |
1032 | if (list_empty(&ghes_nmi)) | |
1033 | register_nmi_handler(NMI_LOCAL, ghes_notify_nmi, 0, "ghes"); | |
1034 | list_add_rcu(&ghes->list, &ghes_nmi); | |
1035 | mutex_unlock(&ghes_list_mutex); | |
1036 | } | |
1037 | ||
1038 | static void ghes_nmi_remove(struct ghes *ghes) | |
1039 | { | |
1040 | unsigned long len; | |
1041 | ||
1042 | mutex_lock(&ghes_list_mutex); | |
1043 | list_del_rcu(&ghes->list); | |
1044 | if (list_empty(&ghes_nmi)) | |
1045 | unregister_nmi_handler(NMI_LOCAL, "ghes"); | |
1046 | mutex_unlock(&ghes_list_mutex); | |
1047 | /* | |
1048 | * To synchronize with NMI handler, ghes can only be | |
1049 | * freed after NMI handler finishes. | |
1050 | */ | |
1051 | synchronize_rcu(); | |
1052 | len = ghes_esource_prealloc_size(ghes->generic); | |
1053 | ghes_estatus_pool_shrink(len); | |
1054 | } | |
1055 | ||
1056 | static void ghes_nmi_init_cxt(void) | |
1057 | { | |
1058 | init_irq_work(&ghes_proc_irq_work, ghes_proc_in_irq); | |
1059 | } | |
1060 | #else /* CONFIG_HAVE_ACPI_APEI_NMI */ | |
1061 | static inline void ghes_nmi_add(struct ghes *ghes) | |
1062 | { | |
1063 | pr_err(GHES_PFX "ID: %d, trying to add NMI notification which is not supported!\n", | |
1064 | ghes->generic->header.source_id); | |
1065 | BUG(); | |
1066 | } | |
1067 | ||
1068 | static inline void ghes_nmi_remove(struct ghes *ghes) | |
1069 | { | |
1070 | pr_err(GHES_PFX "ID: %d, trying to remove NMI notification which is not supported!\n", | |
1071 | ghes->generic->header.source_id); | |
1072 | BUG(); | |
1073 | } | |
1074 | ||
1075 | static inline void ghes_nmi_init_cxt(void) | |
1076 | { | |
1077 | } | |
1078 | #endif /* CONFIG_HAVE_ACPI_APEI_NMI */ | |
1079 | ||
da095fd3 | 1080 | static int ghes_probe(struct platform_device *ghes_dev) |
d334a491 HY |
1081 | { |
1082 | struct acpi_hest_generic *generic; | |
1083 | struct ghes *ghes = NULL; | |
44a69f61 | 1084 | |
7ad6e943 | 1085 | int rc = -EINVAL; |
d334a491 | 1086 | |
1dd6b20e | 1087 | generic = *(struct acpi_hest_generic **)ghes_dev->dev.platform_data; |
d334a491 | 1088 | if (!generic->enabled) |
7ad6e943 | 1089 | return -ENODEV; |
d334a491 | 1090 | |
81e88fdc HY |
1091 | switch (generic->notify.type) { |
1092 | case ACPI_HEST_NOTIFY_POLLED: | |
1093 | case ACPI_HEST_NOTIFY_EXTERNAL: | |
1094 | case ACPI_HEST_NOTIFY_SCI: | |
44a69f61 | 1095 | break; |
c46c9a74 TB |
1096 | case ACPI_HEST_NOTIFY_SEA: |
1097 | if (!IS_ENABLED(CONFIG_ACPI_APEI_SEA)) { | |
1098 | pr_warn(GHES_PFX "Generic hardware error source: %d notified via SEA is not supported\n", | |
1099 | generic->header.source_id); | |
1100 | rc = -ENOTSUPP; | |
1101 | goto err; | |
1102 | } | |
1103 | break; | |
81e88fdc | 1104 | case ACPI_HEST_NOTIFY_NMI: |
44a69f61 TN |
1105 | if (!IS_ENABLED(CONFIG_HAVE_ACPI_APEI_NMI)) { |
1106 | pr_warn(GHES_PFX "Generic hardware error source: %d notified via NMI interrupt is not supported!\n", | |
1107 | generic->header.source_id); | |
1108 | goto err; | |
1109 | } | |
81e88fdc HY |
1110 | break; |
1111 | case ACPI_HEST_NOTIFY_LOCAL: | |
1112 | pr_warning(GHES_PFX "Generic hardware error source: %d notified via local interrupt is not supported!\n", | |
d334a491 HY |
1113 | generic->header.source_id); |
1114 | goto err; | |
81e88fdc HY |
1115 | default: |
1116 | pr_warning(FW_WARN GHES_PFX "Unknown notification type: %u for generic hardware error source: %d\n", | |
1117 | generic->notify.type, generic->header.source_id); | |
1118 | goto err; | |
d334a491 | 1119 | } |
81e88fdc HY |
1120 | |
1121 | rc = -EIO; | |
1122 | if (generic->error_block_length < | |
0a00fd5e | 1123 | sizeof(struct acpi_hest_generic_status)) { |
81e88fdc HY |
1124 | pr_warning(FW_BUG GHES_PFX "Invalid error block length: %u for generic hardware error source: %d\n", |
1125 | generic->error_block_length, | |
d334a491 HY |
1126 | generic->header.source_id); |
1127 | goto err; | |
1128 | } | |
1129 | ghes = ghes_new(generic); | |
1130 | if (IS_ERR(ghes)) { | |
1131 | rc = PTR_ERR(ghes); | |
1132 | ghes = NULL; | |
1133 | goto err; | |
1134 | } | |
21480547 MCC |
1135 | |
1136 | rc = ghes_edac_register(ghes, &ghes_dev->dev); | |
1137 | if (rc < 0) | |
1138 | goto err; | |
1139 | ||
81e88fdc HY |
1140 | switch (generic->notify.type) { |
1141 | case ACPI_HEST_NOTIFY_POLLED: | |
1142 | ghes->timer.function = ghes_poll_func; | |
1143 | ghes->timer.data = (unsigned long)ghes; | |
1144 | init_timer_deferrable(&ghes->timer); | |
1145 | ghes_add_timer(ghes); | |
1146 | break; | |
1147 | case ACPI_HEST_NOTIFY_EXTERNAL: | |
1148 | /* External interrupt vector is GSI */ | |
a98d4f64 WY |
1149 | rc = acpi_gsi_to_irq(generic->notify.vector, &ghes->irq); |
1150 | if (rc) { | |
81e88fdc HY |
1151 | pr_err(GHES_PFX "Failed to map GSI to IRQ for generic hardware error source: %d\n", |
1152 | generic->header.source_id); | |
21480547 | 1153 | goto err_edac_unreg; |
81e88fdc | 1154 | } |
a98d4f64 WY |
1155 | rc = request_irq(ghes->irq, ghes_irq_func, 0, "GHES IRQ", ghes); |
1156 | if (rc) { | |
81e88fdc HY |
1157 | pr_err(GHES_PFX "Failed to register IRQ for generic hardware error source: %d\n", |
1158 | generic->header.source_id); | |
21480547 | 1159 | goto err_edac_unreg; |
81e88fdc HY |
1160 | } |
1161 | break; | |
1162 | case ACPI_HEST_NOTIFY_SCI: | |
7ad6e943 | 1163 | mutex_lock(&ghes_list_mutex); |
d334a491 HY |
1164 | if (list_empty(&ghes_sci)) |
1165 | register_acpi_hed_notifier(&ghes_notifier_sci); | |
1166 | list_add_rcu(&ghes->list, &ghes_sci); | |
7ad6e943 | 1167 | mutex_unlock(&ghes_list_mutex); |
81e88fdc | 1168 | break; |
c46c9a74 TB |
1169 | case ACPI_HEST_NOTIFY_SEA: |
1170 | ghes_sea_add(ghes); | |
1171 | break; | |
81e88fdc | 1172 | case ACPI_HEST_NOTIFY_NMI: |
44a69f61 | 1173 | ghes_nmi_add(ghes); |
81e88fdc HY |
1174 | break; |
1175 | default: | |
1176 | BUG(); | |
d334a491 | 1177 | } |
7ad6e943 | 1178 | platform_set_drvdata(ghes_dev, ghes); |
d334a491 HY |
1179 | |
1180 | return 0; | |
21480547 MCC |
1181 | err_edac_unreg: |
1182 | ghes_edac_unregister(ghes); | |
d334a491 | 1183 | err: |
7ad6e943 | 1184 | if (ghes) { |
d334a491 | 1185 | ghes_fini(ghes); |
7ad6e943 HY |
1186 | kfree(ghes); |
1187 | } | |
d334a491 HY |
1188 | return rc; |
1189 | } | |
1190 | ||
b59bc2fb | 1191 | static int ghes_remove(struct platform_device *ghes_dev) |
d334a491 | 1192 | { |
7ad6e943 HY |
1193 | struct ghes *ghes; |
1194 | struct acpi_hest_generic *generic; | |
d334a491 | 1195 | |
7ad6e943 HY |
1196 | ghes = platform_get_drvdata(ghes_dev); |
1197 | generic = ghes->generic; | |
1198 | ||
81e88fdc | 1199 | ghes->flags |= GHES_EXITING; |
7ad6e943 | 1200 | switch (generic->notify.type) { |
81e88fdc HY |
1201 | case ACPI_HEST_NOTIFY_POLLED: |
1202 | del_timer_sync(&ghes->timer); | |
1203 | break; | |
1204 | case ACPI_HEST_NOTIFY_EXTERNAL: | |
1205 | free_irq(ghes->irq, ghes); | |
1206 | break; | |
7ad6e943 HY |
1207 | case ACPI_HEST_NOTIFY_SCI: |
1208 | mutex_lock(&ghes_list_mutex); | |
1209 | list_del_rcu(&ghes->list); | |
1210 | if (list_empty(&ghes_sci)) | |
1211 | unregister_acpi_hed_notifier(&ghes_notifier_sci); | |
1212 | mutex_unlock(&ghes_list_mutex); | |
1213 | break; | |
c46c9a74 TB |
1214 | case ACPI_HEST_NOTIFY_SEA: |
1215 | ghes_sea_remove(ghes); | |
1216 | break; | |
81e88fdc | 1217 | case ACPI_HEST_NOTIFY_NMI: |
44a69f61 | 1218 | ghes_nmi_remove(ghes); |
81e88fdc | 1219 | break; |
7ad6e943 HY |
1220 | default: |
1221 | BUG(); | |
1222 | break; | |
1223 | } | |
d334a491 | 1224 | |
7ad6e943 | 1225 | ghes_fini(ghes); |
21480547 MCC |
1226 | |
1227 | ghes_edac_unregister(ghes); | |
1228 | ||
7ad6e943 | 1229 | kfree(ghes); |
d334a491 | 1230 | |
7ad6e943 HY |
1231 | platform_set_drvdata(ghes_dev, NULL); |
1232 | ||
1233 | return 0; | |
d334a491 HY |
1234 | } |
1235 | ||
7ad6e943 HY |
1236 | static struct platform_driver ghes_platform_driver = { |
1237 | .driver = { | |
1238 | .name = "GHES", | |
7ad6e943 HY |
1239 | }, |
1240 | .probe = ghes_probe, | |
1241 | .remove = ghes_remove, | |
1242 | }; | |
1243 | ||
d334a491 HY |
1244 | static int __init ghes_init(void) |
1245 | { | |
81e88fdc HY |
1246 | int rc; |
1247 | ||
d334a491 HY |
1248 | if (acpi_disabled) |
1249 | return -ENODEV; | |
1250 | ||
1251 | if (hest_disable) { | |
1252 | pr_info(GHES_PFX "HEST is not enabled!\n"); | |
1253 | return -EINVAL; | |
1254 | } | |
1255 | ||
b6a95016 HY |
1256 | if (ghes_disable) { |
1257 | pr_info(GHES_PFX "GHES is not enabled!\n"); | |
1258 | return -EINVAL; | |
1259 | } | |
1260 | ||
44a69f61 | 1261 | ghes_nmi_init_cxt(); |
67eb2e99 | 1262 | |
81e88fdc HY |
1263 | rc = ghes_ioremap_init(); |
1264 | if (rc) | |
1265 | goto err; | |
1266 | ||
67eb2e99 | 1267 | rc = ghes_estatus_pool_init(); |
81e88fdc HY |
1268 | if (rc) |
1269 | goto err_ioremap_exit; | |
1270 | ||
152cef40 HY |
1271 | rc = ghes_estatus_pool_expand(GHES_ESTATUS_CACHE_AVG_SIZE * |
1272 | GHES_ESTATUS_CACHE_ALLOCED_MAX); | |
1273 | if (rc) | |
1274 | goto err_pool_exit; | |
1275 | ||
67eb2e99 HY |
1276 | rc = platform_driver_register(&ghes_platform_driver); |
1277 | if (rc) | |
1278 | goto err_pool_exit; | |
1279 | ||
9fb0bfe1 HY |
1280 | rc = apei_osc_setup(); |
1281 | if (rc == 0 && osc_sb_apei_support_acked) | |
1282 | pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit and WHEA _OSC.\n"); | |
1283 | else if (rc == 0 && !osc_sb_apei_support_acked) | |
1284 | pr_info(GHES_PFX "APEI firmware first mode is enabled by WHEA _OSC.\n"); | |
1285 | else if (rc && osc_sb_apei_support_acked) | |
1286 | pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit.\n"); | |
1287 | else | |
1288 | pr_info(GHES_PFX "Failed to enable APEI firmware first mode.\n"); | |
1289 | ||
81e88fdc | 1290 | return 0; |
67eb2e99 HY |
1291 | err_pool_exit: |
1292 | ghes_estatus_pool_exit(); | |
81e88fdc HY |
1293 | err_ioremap_exit: |
1294 | ghes_ioremap_exit(); | |
1295 | err: | |
1296 | return rc; | |
d334a491 | 1297 | } |
020bf066 | 1298 | device_initcall(ghes_init); |