linux-kernel - Re: [PATCH -tip] x86: cpu/proc.c adding extended_cpuid

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Message-ID: <20090512141027.GA19143@aftab>
Date:	Tue, 12 May 2009 16:10:27 +0200
From:	Borislav Petkov <borislav.petkov@....com>
To:	Jaswinder Singh Rajput <jaswinder@...nel.org>
CC:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -tip] x86: cpu/proc.c adding extended_cpuid_level for
	/proc/cpuinfo

On Tue, May 12, 2009 at 07:19:37PM +0530, Jaswinder Singh Rajput wrote:
> On Tue, 2009-05-12 at 15:39 +0200, Borislav Petkov wrote:
> > Hi,
> > 
> > On Tue, May 12, 2009 at 12:44:42PM +0530, Jaswinder Singh Rajput wrote:
> > > 
> > > Here are 2 patches for adding new field extended_cpuid_level, please
> > > choose PATCH whichever is more appropriate:
> > > 
> > > PATCH 1:
> > > Subject: [PATCH] x86: cpu/proc.c adding extended_cpuid_level for /proc/cpuinfo
> > > 
> > > extended_cpuid_level also gives useful information like cpuid_level
> > > and very useful for AMD processors.
> > > 
> > > Adding extended_cpuid_level in /proc/cpuinfo completes cpuid_level info.
> > 
> > and this is needed because... ?!
> > 
> 
> why we need cpuid_level ?

It is already visible in userspace. I think you've got an answer to a
very similar question already:

http://marc.info/?l=linux-kernel&m=124206571628464

-- 
Regards/Gruss,
Boris.

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