Messages in this thread |  | | Date | Thu, 16 Nov 2000 01:56:09 +0100 (MET) | From | Mikael Pettersson <> | Subject | Re: New bluesmoke patch available, implements MCE-without-MCA support |
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On 15 Nov 2000, H. Peter Anvin wrote:
>This implements support for MCE on chips which don't support MCA (in >addition to enabling MCA for non-Intel chips, like Athlon, which >supports MCA.) > >I would appreciate it if people who have chips with MCE but no MCA -- >this includes older AMD chips and some Cyrix chips at the very least >-- would please be so kind and try this out.
I have a K6-III which announces MCE but not MCA, so I was going to test this on that machine.
However, both the K6-III manual and the K6 BIOS guide state quite clearly that the K6 family only has a "stub" MCE implementation. The MCE capability is announced, there are two MCE-related MSRs, and there is a CR4.MCE flag, but none of it actually _does_ anything.
The new CPU detection code should probably clear FEATURE_MCE for K6 CPUs. (We might consider it an AMD bug, but in their defense, they do state that the stub implementation was done for "compatibility" reasons.)
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