Re: [PATCH] x86, MCE, AMD: detect the threshold at the initialization period

From: Borislav Petkov
Date: Tue Sep 30 2014 - 07:52:40 EST

On Thu, Sep 25, 2014 at 11:38:09AM +0800, Chen Yucong wrote:
> ADM64 APM Volume 2 (9.3.2 Error-Reporting Register Banks)documents
> that the size of threshold counter is implementation-dependent, and
> the implementations with less than 16 bits fill the most significant
> unimplemented bits with zeros. So THRESHOLD_MAX should be detected
> at the initialization period rather than a constant.
> On the other hand, Error Counter (ERRCT) is bits 47:32, and accordingly
> MASK_ERR_COUNT_HI should be 0x0000FFFF instead of 0x00000FFF.

All the families currently use 12 bits only, i.e. slice [43:32] so
there's no need for changing the current code. We'll address it when it
is actually needed.


Sent from a fat crate under my desk. Formatting is fine.
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