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Re: [Xen-devel] mapping of memory below 16Mb
| To: | Jan Beulich <jbeulich@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] mapping of memory below 16Mb |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Thu, 24 Jan 2008 16:39:12 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Thu, 24 Jan 2008 08:39:56 -0800 |
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| Thread-topic: | [Xen-devel] mapping of memory below 16Mb |
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On 24/1/08 16:35, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: >> That's a dom0 issue. Xen itself does not proactively mess with the MTRRs. > > Yes and no: Yes in the sense that Dom0 could be given an alternative > hypercall to specify memory types. No in the sense that we already have > such a hypercall (setting the MTRRs) that would simply need to do > translation to PAT semantics rather than writing to the MTRR MSRs. If Linux is getting native PAT support, then we shouldn't need MTRR->PAT shimming code in Xen. And thank goodness for that! -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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