opal.c (b746e3e01e70d23ef53dcde1203ab78a1b7ac514) opal.c (6fcd6baa90aeec9dcbe30786e15c125bf50503b2)
1/*
2 * PowerNV OPAL high level interfaces
3 *
4 * Copyright 2011 IBM Corp.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version

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31#include <linux/console.h>
32#include <linux/sched/debug.h>
33
34#include <asm/machdep.h>
35#include <asm/opal.h>
36#include <asm/firmware.h>
37#include <asm/mce.h>
38#include <asm/imc-pmu.h>
1/*
2 * PowerNV OPAL high level interfaces
3 *
4 * Copyright 2011 IBM Corp.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version

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31#include <linux/console.h>
32#include <linux/sched/debug.h>
33
34#include <asm/machdep.h>
35#include <asm/opal.h>
36#include <asm/firmware.h>
37#include <asm/mce.h>
38#include <asm/imc-pmu.h>
39#include <asm/bug.h>
39
40#include "powernv.h"
41
42/* /sys/firmware/opal */
43struct kobject *opal_kobj;
44
45struct opal {
46 u64 base;

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420 recovered = 0;
421 } else if (evt->disposition == MCE_DISPOSITION_RECOVERED) {
422 /* Platform corrected itself */
423 recovered = 1;
424 } else if (evt->severity == MCE_SEV_FATAL) {
425 /* Fatal machine check */
426 pr_err("Machine check interrupt is fatal\n");
427 recovered = 0;
40
41#include "powernv.h"
42
43/* /sys/firmware/opal */
44struct kobject *opal_kobj;
45
46struct opal {
47 u64 base;

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421 recovered = 0;
422 } else if (evt->disposition == MCE_DISPOSITION_RECOVERED) {
423 /* Platform corrected itself */
424 recovered = 1;
425 } else if (evt->severity == MCE_SEV_FATAL) {
426 /* Fatal machine check */
427 pr_err("Machine check interrupt is fatal\n");
428 recovered = 0;
428 } else if ((evt->severity == MCE_SEV_ERROR_SYNC) &&
429 (user_mode(regs) && !is_global_init(current))) {
429 }
430
431 if (!recovered && evt->severity == MCE_SEV_ERROR_SYNC) {
430 /*
432 /*
431 * For now, kill the task if we have received exception when
432 * in userspace.
433 * Try to kill processes if we get a synchronous machine check
434 * (e.g., one caused by execution of this instruction). This
435 * will devolve into a panic if we try to kill init or are in
436 * an interrupt etc.
433 *
434 * TODO: Queue up this address for hwpoisioning later.
437 *
438 * TODO: Queue up this address for hwpoisioning later.
439 * TODO: This is not quite right for d-side machine
440 * checks ->nip is not necessarily the important
441 * address.
435 */
442 */
436 _exception(SIGBUS, regs, BUS_MCEERR_AR, regs->nip);
437 recovered = 1;
443 if ((user_mode(regs))) {
444 _exception(SIGBUS, regs, BUS_MCEERR_AR, regs->nip);
445 recovered = 1;
446 } else if (die_will_crash()) {
447 /*
448 * die() would kill the kernel, so better to go via
449 * the platform reboot code that will log the
450 * machine check.
451 */
452 recovered = 0;
453 } else {
454 die("Machine check", regs, SIGBUS);
455 recovered = 1;
456 }
438 }
457 }
458
439 return recovered;
440}
441
442void pnv_platform_error_reboot(struct pt_regs *regs, const char *msg)
443{
444 /*
445 * This is mostly taken from kernel/panic.c, but tries to do
446 * relatively minimal work. Don't use delay functions (TB may

--- 573 unchanged lines hidden --- 		459 return recovered;
460}
461
462void pnv_platform_error_reboot(struct pt_regs *regs, const char *msg)
463{
464 /*
465 * This is mostly taken from kernel/panic.c, but tries to do
466 * relatively minimal work. Don't use delay functions (TB may

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