Re: [PATCH 1/2] boot: ignore early NMIs

[H. Peter Anvin]

On 03/12/2012 01:01 PM, Eric W. Biederman wrote:
> 
> The basic problem is which source do we block this at?  How many
> sources are their?  And architecturally last I looked x86 no longer
> has a NMI disable EFI and similar systems want to get away without
> a CMOS legacy clock because designers so often get them wrong.
> 

On all processors which have an LAPIC you can block all NMI sources at
the LAPIC.  I think it's safe to assume that if you don't have an LAPIC
-- an ancient system by now -- you have port 70h.

	-hpa

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