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1da177e4 | 1 | /* |
1da177e4 | 2 | * Copyright (C) 2001 Dave Engebretsen IBM Corporation |
d9953105 | 3 | * |
1da177e4 LT |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
d9953105 | 8 | * |
1da177e4 LT |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
d9953105 | 13 | * |
1da177e4 LT |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
17 | */ | |
18 | ||
1da177e4 | 19 | #include <linux/sched.h> |
1da177e4 | 20 | #include <linux/interrupt.h> |
1da177e4 | 21 | #include <linux/irq.h> |
90128997 | 22 | #include <linux/of.h> |
55fc0c56 AB |
23 | #include <linux/fs.h> |
24 | #include <linux/reboot.h> | |
1da177e4 | 25 | |
1da177e4 LT |
26 | #include <asm/machdep.h> |
27 | #include <asm/rtas.h> | |
8c4f1f29 | 28 | #include <asm/firmware.h> |
1da177e4 | 29 | |
577830b0 | 30 | #include "pseries.h" |
c902be71 | 31 | |
1da177e4 LT |
32 | static unsigned char ras_log_buf[RTAS_ERROR_LOG_MAX]; |
33 | static DEFINE_SPINLOCK(ras_log_buf_lock); | |
34 | ||
d368514c AB |
35 | static char global_mce_data_buf[RTAS_ERROR_LOG_MAX]; |
36 | static DEFINE_PER_CPU(__u64, mce_data_buf); | |
1da177e4 | 37 | |
1da177e4 LT |
38 | static int ras_check_exception_token; |
39 | ||
40 | #define EPOW_SENSOR_TOKEN 9 | |
41 | #define EPOW_SENSOR_INDEX 0 | |
1da177e4 | 42 | |
b4af279a VP |
43 | /* EPOW events counter variable */ |
44 | static int num_epow_events; | |
45 | ||
b7d9eb39 | 46 | static irqreturn_t ras_hotplug_interrupt(int irq, void *dev_id); |
7d12e780 DH |
47 | static irqreturn_t ras_epow_interrupt(int irq, void *dev_id); |
48 | static irqreturn_t ras_error_interrupt(int irq, void *dev_id); | |
1da177e4 | 49 | |
0ebfff14 | 50 | |
1da177e4 LT |
51 | /* |
52 | * Initialize handlers for the set of interrupts caused by hardware errors | |
53 | * and power system events. | |
54 | */ | |
55 | static int __init init_ras_IRQ(void) | |
56 | { | |
57 | struct device_node *np; | |
58 | ||
1da177e4 LT |
59 | ras_check_exception_token = rtas_token("check-exception"); |
60 | ||
61 | /* Internal Errors */ | |
62 | np = of_find_node_by_path("/event-sources/internal-errors"); | |
63 | if (np != NULL) { | |
32c96f77 MN |
64 | request_event_sources_irqs(np, ras_error_interrupt, |
65 | "RAS_ERROR"); | |
1da177e4 LT |
66 | of_node_put(np); |
67 | } | |
68 | ||
b7d9eb39 JA |
69 | /* Hotplug Events */ |
70 | np = of_find_node_by_path("/event-sources/hot-plug-events"); | |
71 | if (np != NULL) { | |
e2d59152 ME |
72 | if (dlpar_workqueue_init() == 0) |
73 | request_event_sources_irqs(np, ras_hotplug_interrupt, | |
b7d9eb39 JA |
74 | "RAS_HOTPLUG"); |
75 | of_node_put(np); | |
76 | } | |
77 | ||
1da177e4 LT |
78 | /* EPOW Events */ |
79 | np = of_find_node_by_path("/event-sources/epow-events"); | |
80 | if (np != NULL) { | |
32c96f77 | 81 | request_event_sources_irqs(np, ras_epow_interrupt, "RAS_EPOW"); |
1da177e4 LT |
82 | of_node_put(np); |
83 | } | |
84 | ||
69ed3324 | 85 | return 0; |
1da177e4 | 86 | } |
8e83e905 | 87 | machine_subsys_initcall(pseries, init_ras_IRQ); |
1da177e4 | 88 | |
55fc0c56 AB |
89 | #define EPOW_SHUTDOWN_NORMAL 1 |
90 | #define EPOW_SHUTDOWN_ON_UPS 2 | |
91 | #define EPOW_SHUTDOWN_LOSS_OF_CRITICAL_FUNCTIONS 3 | |
92 | #define EPOW_SHUTDOWN_AMBIENT_TEMPERATURE_TOO_HIGH 4 | |
93 | ||
94 | static void handle_system_shutdown(char event_modifier) | |
95 | { | |
96 | switch (event_modifier) { | |
97 | case EPOW_SHUTDOWN_NORMAL: | |
b4af279a | 98 | pr_emerg("Power off requested\n"); |
1b7e0cbe | 99 | orderly_poweroff(true); |
55fc0c56 AB |
100 | break; |
101 | ||
102 | case EPOW_SHUTDOWN_ON_UPS: | |
b4af279a VP |
103 | pr_emerg("Loss of system power detected. System is running on" |
104 | " UPS/battery. Check RTAS error log for details\n"); | |
79872e35 | 105 | orderly_poweroff(true); |
55fc0c56 AB |
106 | break; |
107 | ||
108 | case EPOW_SHUTDOWN_LOSS_OF_CRITICAL_FUNCTIONS: | |
b4af279a VP |
109 | pr_emerg("Loss of system critical functions detected. Check" |
110 | " RTAS error log for details\n"); | |
1b7e0cbe | 111 | orderly_poweroff(true); |
55fc0c56 AB |
112 | break; |
113 | ||
114 | case EPOW_SHUTDOWN_AMBIENT_TEMPERATURE_TOO_HIGH: | |
b4af279a VP |
115 | pr_emerg("High ambient temperature detected. Check RTAS" |
116 | " error log for details\n"); | |
1b7e0cbe | 117 | orderly_poweroff(true); |
55fc0c56 AB |
118 | break; |
119 | ||
120 | default: | |
b4af279a | 121 | pr_err("Unknown power/cooling shutdown event (modifier = %d)\n", |
55fc0c56 AB |
122 | event_modifier); |
123 | } | |
124 | } | |
125 | ||
126 | struct epow_errorlog { | |
127 | unsigned char sensor_value; | |
128 | unsigned char event_modifier; | |
129 | unsigned char extended_modifier; | |
130 | unsigned char reserved; | |
131 | unsigned char platform_reason; | |
132 | }; | |
133 | ||
134 | #define EPOW_RESET 0 | |
135 | #define EPOW_WARN_COOLING 1 | |
136 | #define EPOW_WARN_POWER 2 | |
137 | #define EPOW_SYSTEM_SHUTDOWN 3 | |
138 | #define EPOW_SYSTEM_HALT 4 | |
139 | #define EPOW_MAIN_ENCLOSURE 5 | |
140 | #define EPOW_POWER_OFF 7 | |
141 | ||
e51df2c1 | 142 | static void rtas_parse_epow_errlog(struct rtas_error_log *log) |
55fc0c56 AB |
143 | { |
144 | struct pseries_errorlog *pseries_log; | |
145 | struct epow_errorlog *epow_log; | |
146 | char action_code; | |
147 | char modifier; | |
148 | ||
149 | pseries_log = get_pseries_errorlog(log, PSERIES_ELOG_SECT_ID_EPOW); | |
150 | if (pseries_log == NULL) | |
151 | return; | |
152 | ||
153 | epow_log = (struct epow_errorlog *)pseries_log->data; | |
154 | action_code = epow_log->sensor_value & 0xF; /* bottom 4 bits */ | |
155 | modifier = epow_log->event_modifier & 0xF; /* bottom 4 bits */ | |
156 | ||
157 | switch (action_code) { | |
158 | case EPOW_RESET: | |
b4af279a VP |
159 | if (num_epow_events) { |
160 | pr_info("Non critical power/cooling issue cleared\n"); | |
161 | num_epow_events--; | |
162 | } | |
55fc0c56 AB |
163 | break; |
164 | ||
165 | case EPOW_WARN_COOLING: | |
b4af279a VP |
166 | pr_info("Non-critical cooling issue detected. Check RTAS error" |
167 | " log for details\n"); | |
55fc0c56 AB |
168 | break; |
169 | ||
170 | case EPOW_WARN_POWER: | |
b4af279a VP |
171 | pr_info("Non-critical power issue detected. Check RTAS error" |
172 | " log for details\n"); | |
55fc0c56 AB |
173 | break; |
174 | ||
175 | case EPOW_SYSTEM_SHUTDOWN: | |
176 | handle_system_shutdown(epow_log->event_modifier); | |
177 | break; | |
178 | ||
179 | case EPOW_SYSTEM_HALT: | |
b4af279a VP |
180 | pr_emerg("Critical power/cooling issue detected. Check RTAS" |
181 | " error log for details. Powering off.\n"); | |
1b7e0cbe | 182 | orderly_poweroff(true); |
55fc0c56 AB |
183 | break; |
184 | ||
185 | case EPOW_MAIN_ENCLOSURE: | |
186 | case EPOW_POWER_OFF: | |
b4af279a VP |
187 | pr_emerg("System about to lose power. Check RTAS error log " |
188 | " for details. Powering off immediately.\n"); | |
55fc0c56 AB |
189 | emergency_sync(); |
190 | kernel_power_off(); | |
191 | break; | |
192 | ||
193 | default: | |
b4af279a | 194 | pr_err("Unknown power/cooling event (action code = %d)\n", |
55fc0c56 AB |
195 | action_code); |
196 | } | |
b4af279a VP |
197 | |
198 | /* Increment epow events counter variable */ | |
199 | if (action_code != EPOW_RESET) | |
200 | num_epow_events++; | |
55fc0c56 AB |
201 | } |
202 | ||
b7d9eb39 JA |
203 | static irqreturn_t ras_hotplug_interrupt(int irq, void *dev_id) |
204 | { | |
205 | struct pseries_errorlog *pseries_log; | |
206 | struct pseries_hp_errorlog *hp_elog; | |
207 | ||
208 | spin_lock(&ras_log_buf_lock); | |
209 | ||
210 | rtas_call(ras_check_exception_token, 6, 1, NULL, | |
211 | RTAS_VECTOR_EXTERNAL_INTERRUPT, virq_to_hw(irq), | |
212 | RTAS_HOTPLUG_EVENTS, 0, __pa(&ras_log_buf), | |
213 | rtas_get_error_log_max()); | |
214 | ||
215 | pseries_log = get_pseries_errorlog((struct rtas_error_log *)ras_log_buf, | |
216 | PSERIES_ELOG_SECT_ID_HOTPLUG); | |
217 | hp_elog = (struct pseries_hp_errorlog *)pseries_log->data; | |
218 | ||
219 | /* | |
220 | * Since PCI hotplug is not currently supported on pseries, put PCI | |
221 | * hotplug events on the ras_log_buf to be handled by rtas_errd. | |
222 | */ | |
223 | if (hp_elog->resource == PSERIES_HP_ELOG_RESOURCE_MEM || | |
224 | hp_elog->resource == PSERIES_HP_ELOG_RESOURCE_CPU) | |
225 | queue_hotplug_event(hp_elog, NULL, NULL); | |
226 | else | |
227 | log_error(ras_log_buf, ERR_TYPE_RTAS_LOG, 0); | |
228 | ||
229 | spin_unlock(&ras_log_buf_lock); | |
230 | return IRQ_HANDLED; | |
231 | } | |
232 | ||
55fc0c56 | 233 | /* Handle environmental and power warning (EPOW) interrupts. */ |
7d12e780 | 234 | static irqreturn_t ras_epow_interrupt(int irq, void *dev_id) |
1da177e4 | 235 | { |
55fc0c56 AB |
236 | int status; |
237 | int state; | |
1da177e4 LT |
238 | int critical; |
239 | ||
1c2cb594 TH |
240 | status = rtas_get_sensor_fast(EPOW_SENSOR_TOKEN, EPOW_SENSOR_INDEX, |
241 | &state); | |
1da177e4 LT |
242 | |
243 | if (state > 3) | |
55fc0c56 | 244 | critical = 1; /* Time Critical */ |
1da177e4 LT |
245 | else |
246 | critical = 0; | |
247 | ||
248 | spin_lock(&ras_log_buf_lock); | |
249 | ||
250 | status = rtas_call(ras_check_exception_token, 6, 1, NULL, | |
b08e281b | 251 | RTAS_VECTOR_EXTERNAL_INTERRUPT, |
476eb491 | 252 | virq_to_hw(irq), |
6f43747f | 253 | RTAS_EPOW_WARNING, |
1da177e4 LT |
254 | critical, __pa(&ras_log_buf), |
255 | rtas_get_error_log_max()); | |
256 | ||
1da177e4 LT |
257 | log_error(ras_log_buf, ERR_TYPE_RTAS_LOG, 0); |
258 | ||
55fc0c56 AB |
259 | rtas_parse_epow_errlog((struct rtas_error_log *)ras_log_buf); |
260 | ||
1da177e4 LT |
261 | spin_unlock(&ras_log_buf_lock); |
262 | return IRQ_HANDLED; | |
263 | } | |
264 | ||
265 | /* | |
266 | * Handle hardware error interrupts. | |
267 | * | |
268 | * RTAS check-exception is called to collect data on the exception. If | |
269 | * the error is deemed recoverable, we log a warning and return. | |
270 | * For nonrecoverable errors, an error is logged and we stop all processing | |
271 | * as quickly as possible in order to prevent propagation of the failure. | |
272 | */ | |
7d12e780 | 273 | static irqreturn_t ras_error_interrupt(int irq, void *dev_id) |
1da177e4 LT |
274 | { |
275 | struct rtas_error_log *rtas_elog; | |
cc8b5263 | 276 | int status; |
1da177e4 LT |
277 | int fatal; |
278 | ||
279 | spin_lock(&ras_log_buf_lock); | |
280 | ||
281 | status = rtas_call(ras_check_exception_token, 6, 1, NULL, | |
b08e281b | 282 | RTAS_VECTOR_EXTERNAL_INTERRUPT, |
476eb491 | 283 | virq_to_hw(irq), |
cc8b5263 | 284 | RTAS_INTERNAL_ERROR, 1 /* Time Critical */, |
1da177e4 LT |
285 | __pa(&ras_log_buf), |
286 | rtas_get_error_log_max()); | |
287 | ||
288 | rtas_elog = (struct rtas_error_log *)ras_log_buf; | |
289 | ||
a08a53ea GK |
290 | if (status == 0 && |
291 | rtas_error_severity(rtas_elog) >= RTAS_SEVERITY_ERROR_SYNC) | |
1da177e4 LT |
292 | fatal = 1; |
293 | else | |
294 | fatal = 0; | |
295 | ||
296 | /* format and print the extended information */ | |
297 | log_error(ras_log_buf, ERR_TYPE_RTAS_LOG, fatal); | |
298 | ||
299 | if (fatal) { | |
b4af279a VP |
300 | pr_emerg("Fatal hardware error detected. Check RTAS error" |
301 | " log for details. Powering off immediately\n"); | |
cc8b5263 AB |
302 | emergency_sync(); |
303 | kernel_power_off(); | |
1da177e4 | 304 | } else { |
b4af279a | 305 | pr_err("Recoverable hardware error detected\n"); |
1da177e4 LT |
306 | } |
307 | ||
308 | spin_unlock(&ras_log_buf_lock); | |
309 | return IRQ_HANDLED; | |
310 | } | |
311 | ||
d368514c AB |
312 | /* |
313 | * Some versions of FWNMI place the buffer inside the 4kB page starting at | |
314 | * 0x7000. Other versions place it inside the rtas buffer. We check both. | |
315 | */ | |
316 | #define VALID_FWNMI_BUFFER(A) \ | |
317 | ((((A) >= 0x7000) && ((A) < 0x7ff0)) || \ | |
318 | (((A) >= rtas.base) && ((A) < (rtas.base + rtas.size - 16)))) | |
319 | ||
320 | /* | |
321 | * Get the error information for errors coming through the | |
1da177e4 LT |
322 | * FWNMI vectors. The pt_regs' r3 will be updated to reflect |
323 | * the actual r3 if possible, and a ptr to the error log entry | |
324 | * will be returned if found. | |
325 | * | |
d368514c AB |
326 | * If the RTAS error is not of the extended type, then we put it in a per |
327 | * cpu 64bit buffer. If it is the extended type we use global_mce_data_buf. | |
328 | * | |
329 | * The global_mce_data_buf does not have any locks or protection around it, | |
1da177e4 LT |
330 | * if a second machine check comes in, or a system reset is done |
331 | * before we have logged the error, then we will get corruption in the | |
332 | * error log. This is preferable over holding off on calling | |
333 | * ibm,nmi-interlock which would result in us checkstopping if a | |
334 | * second machine check did come in. | |
335 | */ | |
336 | static struct rtas_error_log *fwnmi_get_errinfo(struct pt_regs *regs) | |
337 | { | |
1da177e4 | 338 | unsigned long *savep; |
d368514c | 339 | struct rtas_error_log *h, *errhdr = NULL; |
1da177e4 | 340 | |
ee1dd1e3 MS |
341 | /* Mask top two bits */ |
342 | regs->gpr[3] &= ~(0x3UL << 62); | |
343 | ||
d368514c | 344 | if (!VALID_FWNMI_BUFFER(regs->gpr[3])) { |
f0e939ae | 345 | printk(KERN_ERR "FWNMI: corrupt r3 0x%016lx\n", regs->gpr[3]); |
d368514c AB |
346 | return NULL; |
347 | } | |
348 | ||
349 | savep = __va(regs->gpr[3]); | |
350 | regs->gpr[3] = savep[0]; /* restore original r3 */ | |
351 | ||
352 | /* If it isn't an extended log we can use the per cpu 64bit buffer */ | |
353 | h = (struct rtas_error_log *)&savep[1]; | |
a08a53ea | 354 | if (!rtas_error_extended(h)) { |
69111bac CL |
355 | memcpy(this_cpu_ptr(&mce_data_buf), h, sizeof(__u64)); |
356 | errhdr = (struct rtas_error_log *)this_cpu_ptr(&mce_data_buf); | |
1da177e4 | 357 | } else { |
a08a53ea | 358 | int len, error_log_length; |
d368514c | 359 | |
a08a53ea GK |
360 | error_log_length = 8 + rtas_error_extended_log_length(h); |
361 | len = max_t(int, error_log_length, RTAS_ERROR_LOG_MAX); | |
d368514c AB |
362 | memset(global_mce_data_buf, 0, RTAS_ERROR_LOG_MAX); |
363 | memcpy(global_mce_data_buf, h, len); | |
364 | errhdr = (struct rtas_error_log *)global_mce_data_buf; | |
1da177e4 | 365 | } |
d368514c | 366 | |
1da177e4 LT |
367 | return errhdr; |
368 | } | |
369 | ||
370 | /* Call this when done with the data returned by FWNMI_get_errinfo. | |
371 | * It will release the saved data area for other CPUs in the | |
372 | * partition to receive FWNMI errors. | |
373 | */ | |
374 | static void fwnmi_release_errinfo(void) | |
375 | { | |
376 | int ret = rtas_call(rtas_token("ibm,nmi-interlock"), 0, 1, NULL); | |
377 | if (ret != 0) | |
d368514c | 378 | printk(KERN_ERR "FWNMI: nmi-interlock failed: %d\n", ret); |
1da177e4 LT |
379 | } |
380 | ||
c902be71 | 381 | int pSeries_system_reset_exception(struct pt_regs *regs) |
1da177e4 | 382 | { |
bded0706 NP |
383 | #ifdef __LITTLE_ENDIAN__ |
384 | /* | |
385 | * Some firmware byteswaps SRR registers and gives incorrect SRR1. Try | |
386 | * to detect the bad SRR1 pattern here. Flip the NIP back to correct | |
387 | * endian for reporting purposes. Unfortunately the MSR can't be fixed, | |
388 | * so clear it. It will be missing MSR_RI so we won't try to recover. | |
389 | */ | |
390 | if ((be64_to_cpu(regs->msr) & | |
391 | (MSR_LE|MSR_RI|MSR_DR|MSR_IR|MSR_ME|MSR_PR| | |
392 | MSR_ILE|MSR_HV|MSR_SF)) == (MSR_DR|MSR_SF)) { | |
393 | regs->nip = be64_to_cpu((__be64)regs->nip); | |
394 | regs->msr = 0; | |
395 | } | |
396 | #endif | |
397 | ||
1da177e4 LT |
398 | if (fwnmi_active) { |
399 | struct rtas_error_log *errhdr = fwnmi_get_errinfo(regs); | |
400 | if (errhdr) { | |
401 | /* XXX Should look at FWNMI information */ | |
402 | } | |
403 | fwnmi_release_errinfo(); | |
404 | } | |
102c05e8 NP |
405 | |
406 | if (smp_handle_nmi_ipi(regs)) | |
407 | return 1; | |
408 | ||
c902be71 | 409 | return 0; /* need to perform reset */ |
1da177e4 LT |
410 | } |
411 | ||
412 | /* | |
413 | * See if we can recover from a machine check exception. | |
414 | * This is only called on power4 (or above) and only via | |
415 | * the Firmware Non-Maskable Interrupts (fwnmi) handler | |
416 | * which provides the error analysis for us. | |
417 | * | |
418 | * Return 1 if corrected (or delivered a signal). | |
419 | * Return 0 if there is nothing we can do. | |
420 | */ | |
d47d1d8a | 421 | static int recover_mce(struct pt_regs *regs, struct rtas_error_log *err) |
1da177e4 | 422 | { |
d47d1d8a | 423 | int recovered = 0; |
a08a53ea | 424 | int disposition = rtas_error_disposition(err); |
1da177e4 | 425 | |
d47d1d8a AB |
426 | if (!(regs->msr & MSR_RI)) { |
427 | /* If MSR_RI isn't set, we cannot recover */ | |
428 | recovered = 0; | |
429 | ||
a08a53ea | 430 | } else if (disposition == RTAS_DISP_FULLY_RECOVERED) { |
1da177e4 | 431 | /* Platform corrected itself */ |
d47d1d8a AB |
432 | recovered = 1; |
433 | ||
a08a53ea | 434 | } else if (disposition == RTAS_DISP_LIMITED_RECOVERY) { |
d47d1d8a AB |
435 | /* Platform corrected itself but could be degraded */ |
436 | printk(KERN_ERR "MCE: limited recovery, system may " | |
437 | "be degraded\n"); | |
438 | recovered = 1; | |
439 | ||
440 | } else if (user_mode(regs) && !is_global_init(current) && | |
a08a53ea | 441 | rtas_error_severity(err) == RTAS_SEVERITY_ERROR_SYNC) { |
d47d1d8a AB |
442 | |
443 | /* | |
444 | * If we received a synchronous error when in userspace | |
445 | * kill the task. Firmware may report details of the fail | |
446 | * asynchronously, so we can't rely on the target and type | |
447 | * fields being valid here. | |
448 | */ | |
449 | printk(KERN_ERR "MCE: uncorrectable error, killing task " | |
450 | "%s:%d\n", current->comm, current->pid); | |
451 | ||
452 | _exception(SIGBUS, regs, BUS_MCEERR_AR, regs->nip); | |
453 | recovered = 1; | |
1da177e4 LT |
454 | } |
455 | ||
3f9793e6 | 456 | log_error((char *)err, ERR_TYPE_RTAS_LOG, 0); |
1da177e4 | 457 | |
d47d1d8a | 458 | return recovered; |
1da177e4 LT |
459 | } |
460 | ||
461 | /* | |
462 | * Handle a machine check. | |
463 | * | |
464 | * Note that on Power 4 and beyond Firmware Non-Maskable Interrupts (fwnmi) | |
465 | * should be present. If so the handler which called us tells us if the | |
466 | * error was recovered (never true if RI=0). | |
467 | * | |
468 | * On hardware prior to Power 4 these exceptions were asynchronous which | |
469 | * means we can't tell exactly where it occurred and so we can't recover. | |
470 | */ | |
471 | int pSeries_machine_check_exception(struct pt_regs *regs) | |
472 | { | |
473 | struct rtas_error_log *errp; | |
474 | ||
475 | if (fwnmi_active) { | |
476 | errp = fwnmi_get_errinfo(regs); | |
477 | fwnmi_release_errinfo(); | |
478 | if (errp && recover_mce(regs, errp)) | |
479 | return 1; | |
480 | } | |
481 | ||
482 | return 0; | |
483 | } |