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

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Message-ID: <50D25AA9.3090306@zytor.com>
Date:	Wed, 19 Dec 2012 16:24:09 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Jacob Shin <jacob.shin@....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 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)?

	-hpa


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