Messages in this thread | | | Date | Thu, 10 Jan 2002 18:43:31 +0100 (CET) | From | Dave Jones <> | Subject | Re: initramfs programs (was [RFC] klibc requirements) |
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On Thu, 10 Jan 2002, H. Peter Anvin wrote:
> > (Also, some implementations allow for this string to be changed, > > some folks have it set to "PenguinPowered" and the likes 8-) > Sure, but if you do that you're *asking*, in a very literal way, for > your CPU to misidentified. In fact, a major reason for making this > string modifiable is due to certain vendors who hard-code CPUID strings > in their code.
Absolutely, no argument from me there.
> > Asides from the above issues, multiple CPUs have the same > > cpuid sometimes, meaning you have to check things like > > cache size as well (though most (all?) of these should > > end up with the same CONFIG_ option iirc, so this shouldn't > > be an issue -- you should check to be sure though) > Why -- if it doesn't change anything, all you're doing is making it > confusing when the next derivative appears. Remember that we *do* need, > as much as possible, to be forward compatible with future CPUs.
If every combination for a given cpuid translates to the same CONFIG_ option, fine. I'm just not sure from memory if thats the case or not. The various Celeron/PIII's for example, some have SSE, some don't. Assuming Intel cpuid xxx translates to CONFIG_PENTIUMIII would break if thats the case.
-- | Dave Jones. http://www.codemonkey.org.uk | SuSE Labs
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