linux-kernel - Re: Geode LX boot fails after x86 microcode revision change

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Message-ID: <4EB9AAF1.4040103@zytor.com>
Date:	Tue, 08 Nov 2011 14:19:29 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Petkov, Borislav" <Borislav.Petkov@....com>
CC:	Borislav Petkov <bp@...64.org>, Daniel Drake <dsd@...top.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Geode LX boot fails after x86 microcode revision change

On 11/08/2011 02:13 PM, Petkov, Borislav wrote:
> 
> This could definitely explain why it hangs, the rdmsr_safe call is
>  in early_init_amd(), so it could really be too early for exception tables.
> 

Yes, it is.

> If so, then a family check is unavoidable.

Either that, or make changes so that we can handle exceptions earlier.
That would be useful for other reasons.

	-hpa
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