Messages in this thread | | | Date | Wed, 16 May 2007 18:10:13 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 |
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On Thu, 17 May 2007, Christian wrote: > > my small VIA C3_2 box does not boot with 2.6.22-rc1. > It even does not uncompress the kernel. > > The configuration as M386 M486 works. But M586 + MVIAC3_2 > does not work.
Ahh, from the EPIA HOWTO:
13.2. Is the C3 Pentium compatible?
Yes. But Samuel 2, Ezra, Ezra T C3 processors have a problem with the cmpxchg8b (i.e. CMOV) opcode. Nehemiah and Antaur processors are not affected.
However, that would imply that you don't have a VIA C3-2 (Nehamiah) at all, but the older original CyrixIII/VIA C3.
Can you check? The Nehemian (C3-2) should be model 9 or greater.
So afaik, you should use MCYRIXIII, and make _that_ be the one that disables the use of the cmpxchg8b instruction.
Can you please verify?
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