From: H. Peter Anvin <hpa@zytor.com>
Date: Mon, 4 Feb 2008 15:47:59 +0000 (+0100)
Subject: x86: cpuid: allow querying %ecx-sensitive CPUID levels
X-Git-Tag: v2.6.25-rc1~1057^2~56
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2347d933b158932cf2b8aeebae3e5cc16b200bd1;p=pandora-kernel.git

x86: cpuid: allow querying %ecx-sensitive CPUID levels

After /dev/*/cpuid was introduced, Intel changed the semantics of the
CPUID instruction to be sentitive to %ecx as well as %eax.  This patch
allows querying of %ecx-sensitive levels by placing the %ecx value in
the upper 32 bits of the file position (lower 32 bits always were used
for the %eax value.)

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

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