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RAS: Add a Corrected Errors Collector

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Introduce a simple data structure for collecting correctable errors
along with accessors. More detailed description in the code itself.

The error decoding is done with the decoding chain now and
mce_first_notifier() gets to see the error first and the CEC decides
whether to log it and then the rest of the chain doesn't hear about it -
basically the main reason for the CE collector - or to continue running
the notifiers.

When the CEC hits the action threshold, it will try to soft-offine the
page containing the ECC and then the whole decoding chain gets to see
the error.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20170327093304.10683-5-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Borislav Petkov
2017-03-27 11:33:02 +02:00
committed by Ingo Molnar
parent e64edfcce9
commit 011d826111
10 changed files with 706 additions and 83 deletions
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9
arch/x86/include/asm/mce.h
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@@ -191,10 +191,11 @@ extern struct mca_config mca_cfg;
extern struct mca_msr_regs msr_ops;
enum mce_notifier_prios {
MCE_PRIO_SRAO = INT_MAX,
MCE_PRIO_EXTLOG = INT_MAX - 1,
MCE_PRIO_NFIT = INT_MAX - 2,
MCE_PRIO_EDAC = INT_MAX - 3,
MCE_PRIO_FIRST = INT_MAX,
MCE_PRIO_SRAO = INT_MAX - 1,
MCE_PRIO_EXTLOG = INT_MAX - 2,
MCE_PRIO_NFIT = INT_MAX - 3,
MCE_PRIO_EDAC = INT_MAX - 4,
MCE_PRIO_LOWEST = 0,
};