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Date:	Wed, 19 Dec 2012 15:43:36 -0800
From:	"H. Peter Anvin" <>
To:	Yinghai Lu <>
CC:	Borislav Petkov <>, Jacob Shin <>,
	"H. Peter Anvin" <>,
	"Yu, Fenghua" <>,
	"" <>,
	"" <>,
	"" <>,
	Konrad Rzeszutek Wilk <>,
	Stefano Stabellini <>
Subject: Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update
 ucode on Intel's CPU

On 12/19/2012 03:40 PM, Yinghai Lu wrote:
> On Wed, Dec 19, 2012 at 3:22 PM, H. Peter Anvin <> wrote:
>> The other bit is that building the real kernel page tables iteratively
>> (ignoring the early page tables here) is safer, since the real page
>> table builder is fully aware of the memory map.  This means any
>> "spillover" from the early page tables gets minimized to regions where
>> there are data objects that have to be accessed early.  Since Yinghai
>> already had iterative page table building working, I don't see any
>> reason to not use that capability.
> that is v6, right?
> including that patch

No, that's just a different way to create the early page tables (and it 
doesn't solve anything, quite on the contrary.)  I'm talking about the 
strategy for creating the *permanent* page tables


H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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