Messages in this thread | | | Date | Wed, 16 May 2007 20:05:35 -0700 | From | "H. Peter Anvin" <> | Subject | Re: 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 |
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Linus Torvalds wrote: > > On Thu, 17 May 2007, Christian wrote: > >> Linus Torvalds wrote: >>> Can you check? The Nehemian (C3-2) should be model 9 or greater. >> Yes, it's a Nehemiah > > Ok. If so, we should blacklist both MCYRIXIII and MVIAC3_2, I suspect. > >> lola:~ # cat /proc/cpuinfo >> flags : fpu vme de pse tsc msr cx8 sep mtrr pge cmov pat mmx fxsr sse rng rng_en ace ace_en > > However, it does seem to *claim* to support "cx8" aka cmpxchg8b. What's up > with that?
It gets turned on by the code in arch/i386/kernel/cpu. It's just that the new code that Andi added runs during setup, i.e. in real mode, so *way* earlier than that.
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