Re: [PATCH 3/6] x86-mce: Clear CMCI enable on all claimed CMCI banks before reboot.

From: Tony Luck
Date: Thu Jul 10 2014 - 12:33:45 EST

On Thu, Jul 10, 2014 at 9:24 AM, Borislav Petkov <bp@xxxxxxxxx> wrote:
> I'm saying that because I'm assuming BIOS will clear those MSRs upon
> warm reset. If it doesn't, then we have a bigger problem.

We don't have to trust BIOS to do that. SDM section
"IA32_MCi_CTL2 MSRs" says:

After processor reset, IA32_MCi_CTL2 MSRs are zeroâed.

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