Re: SMP possible with AMD CPUs?

Eric W. Biederman (ebiederm@xmission.com)
03 Aug 2001 01:07:42 -0600

Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

> > 3. The BIOS (apparently) doesn't setup the MTRR properly on both CPUs making
> mtrr bitch about a mismatch.
>
>
> The mtrr driver fixups should cure that - its a common bios bug.

There is some truth in that. But note AMD hasn't released all of the
documentation related to their MTRR's so we can't rely on linux fixing
all of those BIOS bugs. In this case it happens to be different
caching on the BIOS chip, from different cpus.

An interesting question is what is 0x1e in the AMD fixed mtrr's.

Eric
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