From: "H. Peter Anvin" <hpa@zytor.com>
To: Borislav Petkov <borislav.petkov@amd.com>
Cc: Jaswinder Singh Rajput <jaswinder@kernel.org>,
Ingo Molnar <mingo@elte.hu>, x86 maintainers <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -tip] x86: cpu/proc.c adding extended_cpuid_level for /proc/cpuinfo
Date: Tue, 12 May 2009 09:40:40 -0700 [thread overview]
Message-ID: <4A09A688.6080603@zytor.com> (raw)
In-Reply-To: <20090512141027.GA19143@aftab>
Borislav Petkov wrote:
>>>
>> 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
>
extended_cpuid_level should be motivated, but probably does make sense.
It hardly "completes" /proc/cpuinfo; especially if you consider that
there are at least three additional ranges in wide use (two used by a
single vendor only, and the third by virtualization software.)
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2009-05-12 16:42 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-12 7:14 [PATCH -tip] x86: cpu/proc.c adding extended_cpuid_level for /proc/cpuinfo Jaswinder Singh Rajput
2009-05-12 13:39 ` Borislav Petkov
2009-05-12 13:49 ` Jaswinder Singh Rajput
2009-05-12 14:10 ` Borislav Petkov
2009-05-12 16:40 ` H. Peter Anvin [this message]
2009-05-12 18:13 ` Borislav Petkov
2009-05-12 18:47 ` H. Peter Anvin
2009-05-12 19:49 ` Borislav Petkov
2009-06-05 19:20 ` Jaswinder Singh Rajput
2009-05-13 6:21 ` Andrew Morton
2009-05-13 8:03 ` Andi Kleen
2009-06-05 18:38 ` Jaswinder Singh Rajput
2009-06-05 20:55 ` H. Peter Anvin
2009-06-06 4:23 ` Jaswinder Singh Rajput
2009-06-10 16:40 ` Jaswinder Singh Rajput
2009-06-10 17:14 ` H. Peter Anvin
2009-06-10 17:42 ` Borislav Petkov
2009-06-10 17:48 ` H. Peter Anvin
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