Messages in this thread | | | Date | Wed, 17 Feb 2010 15:41:39 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 10/10] x86-32: panic on !CX8 && XMM |
| |
On 02/17/2010 03:00 PM, Yuhong Bao wrote: > >> NAK in the extreme. >> >> This is not how we deal with these kinds of stuff. If this really >> matters, we explicitly clear the CPU feature in the feature detect code. > Also, don't forget the NT4 CX8 bug with non-Intel/AMD/Cyrix vendors: > http://www.geoffchappell.com/studies/windows/km/cpu/cx8.htm > If a processor support SSE (or PAE or MMX for that matter), you can pretty much assume CX8 exists even if the feature bit is cleared because of this bug. >
Those kinds of things we *also* deal with by adjusting the CPU features in the detection code.
-hpa
| |