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SubjectRe: [Fwd: CPU detection revamp (Request for comments)] wrote:
> Hi hpa,
> First test, the AMD K6-2.
> Also, look at the feature flags:
> before:
> flags : fpu vme de pse tsc msr mce cx8 sep mtrr pge mmx 3dnow
> after:
> features : fpu vme de pse tsc msr mce cx8 pge mmx syscall 3dnow
> Note, I lost MTRR & sep. This may be related to the stepping bug
> though. I'll recompile a kernel with the &15 fix, and see if that cures
> all.

The K6's don't support sysenter/sysexit. It really should have been
marked differently before. The early K6's used extended bit 10 to
indicate syscall/sysret capabality, but this version has some quirks
that make it pretty much unusable. Later K6's use extended bit 11 to
indicate syscall/sysret.


Brian Gerst
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