From: Andreas Herrmann <herrmann.der.user@googlemail.com>
Date: Tue, 27 Apr 2010 10:13:48 +0000 (+0200)
Subject: x86, amd: Check X86_FEATURE_OSVW bit before accessing OSVW MSRs
X-Git-Tag: v2.6.34~12^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f01487119dda3d9f58c9729c7361ecc50a61c188;p=pandora-kernel.git

x86, amd: Check X86_FEATURE_OSVW bit before accessing OSVW MSRs

If host CPU is exposed to a guest the OSVW MSRs are not guaranteed
to be present and a GP fault occurs. Thus checking the feature flag is
essential.

Cc: <stable@kernel.org> # .32.x .33.x
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
LKML-Reference: <20100427101348.GC4489@alberich.amd.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---

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