Messages in this thread | | | Date | Mon, 08 Sep 2008 13:14:25 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [git pull] x86 fixes |
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Arjan van de Ven wrote: > > I'd lump all cpus that don't have cpuid in this bucket too (eg half the > 486es) simply because not having cpuid is painful in pretty much the > same way. >
Not really. Detecting CPUID is pretty trivial, and we just initialize the feature vector to zero if it isn't there.
>> - "modern 32-bit": PPro and better. Can take CMOV, MMX and TSC for >> granted. > > again makes sense; question is if it makes sense to take PSE and PAE > for granted as well (although PSE we can do runtime I suppose)
Well, PAE implies PSE. Unfortunately Intel released a series of Pentium-Ms without PAE support. We *should* be able to take PSE for granted, but there is Xen damage.
-hpa
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