Messages in this thread | | | Date | Mon, 12 Mar 2012 13:04:59 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 1/2] boot: ignore early NMIs |
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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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