Re: [PATCH 7/7] x86/mce: Clear Local MCE opt-in before kexec

From	Andy Lutomirski <luto@amacapital.net>
Newsgroups	linux.kernel
Subject	Re: [PATCH 7/7] x86/mce: Clear Local MCE opt-in before kexec
Date	2015-07-17 03:20 +0200
Message-ID	<pN2tH-7ap-7@gated-at.bofh.it> (permalink)
References	<pMM5z-ay-3@gated-at.bofh.it> <pMM5z-ay-5@gated-at.bofh.it> <pMM5z-ay-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Jul 16, 2015 at 12:44 AM, Borislav Petkov <bp@suse.de> wrote:
> From: Ashok Raj <ashok.raj@intel.com>
>
> kexec could boot a kernel that could be legacy with no knowledge of
> LMCE. Hence we should make sure we clear LMCE optin before kexec reboot.
>

What happens if an offline-but-not-unplugged CPU gets an MCE?  Or does
this code also clear CR4.MCE?

--Andy
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Re: [PATCH 7/7] x86/mce: Clear Local MCE opt-in before kexec Andy Lutomirski <luto@amacapital.net> - 2015-07-17 03:20 +0200

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