diff options
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/Makefile | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/mce-internal.h | 10 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/mce-severity.c | 61 |
3 files changed, 72 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/Makefile b/arch/x86/kernel/cpu/mcheck/Makefile index 60ee182c6c52..45004faf67ea 100644 --- a/arch/x86/kernel/cpu/mcheck/Makefile +++ b/arch/x86/kernel/cpu/mcheck/Makefile @@ -1,5 +1,6 @@ obj-y = mce.o therm_throt.o +obj-$(CONFIG_X86_NEW_MCE) += mce-severity.o obj-$(CONFIG_X86_OLD_MCE) += k7.o p4.o p6.o obj-$(CONFIG_X86_ANCIENT_MCE) += winchip.o p5.o obj-$(CONFIG_X86_MCE_P4THERMAL) += mce_intel.o diff --git a/arch/x86/kernel/cpu/mcheck/mce-internal.h b/arch/x86/kernel/cpu/mcheck/mce-internal.h new file mode 100644 index 000000000000..f126b4ae7a25 --- /dev/null +++ b/arch/x86/kernel/cpu/mcheck/mce-internal.h @@ -0,0 +1,10 @@ +#include <asm/mce.h> + +enum severity_level { + MCE_NO_SEVERITY, + MCE_SOME_SEVERITY, + MCE_UC_SEVERITY, + MCE_PANIC_SEVERITY, +}; + +int mce_severity(struct mce *a, int tolerant, char **msg); diff --git a/arch/x86/kernel/cpu/mcheck/mce-severity.c b/arch/x86/kernel/cpu/mcheck/mce-severity.c new file mode 100644 index 000000000000..c189e89a89ae --- /dev/null +++ b/arch/x86/kernel/cpu/mcheck/mce-severity.c @@ -0,0 +1,61 @@ +/* + * MCE grading rules. + * Copyright 2008, 2009 Intel Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; version 2 + * of the License. + * + * Author: Andi Kleen + */ +#include <linux/kernel.h> +#include <asm/mce.h> + +#include "mce-internal.h" + +/* + * Grade an mce by severity. In general the most severe ones are processed + * first. Since there are quite a lot of combinations test the bits in a + * table-driven way. The rules are simply processed in order, first + * match wins. + */ + +static struct severity { + u64 mask; + u64 result; + unsigned char sev; + unsigned char mcgmask; + unsigned char mcgres; + char *msg; +} severities[] = { +#define SEV(s) .sev = MCE_ ## s ## _SEVERITY +#define BITCLR(x, s, m, r...) { .mask = x, .result = 0, SEV(s), .msg = m, ## r } +#define BITSET(x, s, m, r...) { .mask = x, .result = x, SEV(s), .msg = m, ## r } +#define MCGMASK(x, res, s, m, r...) \ + { .mcgmask = x, .mcgres = res, SEV(s), .msg = m, ## r } + BITCLR(MCI_STATUS_VAL, NO, "Invalid"), + BITCLR(MCI_STATUS_EN, NO, "Not enabled"), + BITSET(MCI_STATUS_PCC, PANIC, "Processor context corrupt"), + MCGMASK(MCG_STATUS_RIPV, 0, PANIC, "No restart IP"), + BITSET(MCI_STATUS_UC|MCI_STATUS_OVER, PANIC, "Overflowed uncorrected"), + BITSET(MCI_STATUS_UC, UC, "Uncorrected"), + BITSET(0, SOME, "No match") /* always matches. keep at end */ +}; + +int mce_severity(struct mce *a, int tolerant, char **msg) +{ + struct severity *s; + for (s = severities;; s++) { + if ((a->status & s->mask) != s->result) + continue; + if ((a->mcgstatus & s->mcgmask) != s->mcgres) + continue; + if (s->sev > MCE_NO_SEVERITY && (a->status & MCI_STATUS_UC) && + tolerant < 1) + return MCE_PANIC_SEVERITY; + if (msg) + *msg = s->msg; + return s->sev; + } +} |