linux-kernel - Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU

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Message-ID: <20121220002954.GA10405@jshin-Toonie>
Date:	Wed, 19 Dec 2012 18:29:54 -0600
From:	Jacob Shin <jacob.shin@....com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Borislav Petkov <bp@...en8.de>, Yinghai Lu <yinghai@...nel.org>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	"Yu, Fenghua" <fenghua.yu@...el.com>,
	"mingo@...nel.org" <mingo@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"linux-tip-commits@...r.kernel.org" 
	<linux-tip-commits@...r.kernel.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Stefano Stabellini <Stefano.Stabellini@...citrix.com>
Subject: Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update
 ucode on Intel's CPU

On Wed, Dec 19, 2012 at 04:24:09PM -0800, H. Peter Anvin wrote:
> On 12/19/2012 04:07 PM, Jacob Shin wrote:
> > 
> > From what I remember, accessing memory around the memory hole (not
> > just the HT hole, but e038000000 ~ 10000000000 on our mentioned system
> > ) generated prefetches because the memory hole was marked as WB in PAT.
> > 
> > I'll take a look at the system again, try the blanket MTRR covering
> > 0xe000000000 ~ 1TB, and talk to our BIOS guys.
> > 
> 
> Yes, but do they all #MC (as opposed to, say, fetching all FFs)?

Yes, MCE every time and it was fatal.

> 
> 	-hpa
> 
> 
> 

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