Messages in this thread | | | Date | Sun, 26 Oct 2008 17:34:58 -0700 | From | Arjan van de Ven <> | Subject | Re: PAT and MTRRs |
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On Sun, 26 Oct 2008 17:21:41 -0700 "H. Peter Anvin" <hpa@zytor.com> wrote:
> Arjan van de Ven wrote: > > > > PAT can't make memory cachable that the MTRR's have as uncachable. > > What PAT *can* do is, within an MTRR, do fine grained mapping... > > > > Now, if it wasn't for the braindamage called ACPI and SMM, we could > have cleared the MTRR settings and just used PAT... >
yeah.. one thing we need to investigate is if we can set the default "no mtrr coverage" value to cached (and also.. to check we don't set that to uncached if the bios had it set to cached..)
-- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for ape savings, visit http://www.lesswatts.org
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