x86, nmi: IOCK error

Maciej W. Rozycki macro at orcam.me.uk
Sat Jan 8 18:09:45 EST 2022

On Tue, 23 Nov 2021, Muni Sekhar wrote:

> > Red Hat has a good article on the subject at
> > https://access.redhat.com/solutions/42261.
> NMI: IOCK error (debug interrupt?) for reason 60 on CPU 0.
> NMI: IOCK error (debug interrupt?) for reason 70 on CPU 0.
> What's the difference between reason 60 & reason 70? I was not able to
> find it in the above mentioned link.

 For any practical purpose the value of bit #4 in the NMI Status and 
Control Register does not matter as (in a compatible system) it merely 
toggles with every DRAM refresh cycle.



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