Re: [patch 1/2] x2apic: fix reserved APIC register accesses inprint_local_APIC()

From: Ingo Molnar
Date: Fri Sep 05 2008 - 12:04:44 EST



* Maciej W. Rozycki <macro@xxxxxxxxxxxxxx> wrote:

> On Wed, 3 Sep 2008, Suresh Siddha wrote:
>
> > from SDV Vol 3a Section 17.27.1
> >
> > The remote read delivery mode provided in the 82489DX and local APIC for
> > Pentium processors is not supported in the local APIC in the Pentium 4, Intel
> > Xeon, and P6 family processors.
> >
> > It looks like it is not supported (officially atleast) even in APIC bus
> > architectures. Only the Pentium integrated APIC seems to be the exception.
>
> Yeah, trust documentation and see where you'll get... ;)

hm, is the remote read debug output, now that it's not present in CPUs
made in the past 5 years or so, really that important?

Ingo
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