From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 12 Jan 2014 03:15:52 +0000 (-0800)
Subject: x86, fpu, amd: Clear exceptions in AMD FXSAVE workaround
X-Git-Tag: v3.13~19^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=26bef1318adc1b3a530ecc807ef99346db2aa8b0;p=pandora-kernel.git

x86, fpu, amd: Clear exceptions in AMD FXSAVE workaround

Before we do an EMMS in the AMD FXSAVE information leak workaround we
need to clear any pending exceptions, otherwise we trap with a
floating-point exception inside this code.

Reported-by: halfdog <me@halfdog.net>
Tested-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/CA%2B55aFxQnY_PCG_n4=0w-VG=YLXL-yr7oMxyy0WU2gCBAf3ydg@mail.gmail.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---

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