From: Zachary Amsden <zach@vmware.com>
Date: Tue, 13 Feb 2007 12:26:21 +0000 (+0100)
Subject: [PATCH] i386: iOPL handling for paravirt guests
X-Git-Tag: v2.6.21-rc1~184^2~70
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8b15114434998a78aa50f8559d69c7a400cff267;p=pandora-kernel.git

[PATCH] i386: iOPL handling for paravirt guests

I found a clever way to make the extra IOPL switching invisible to
non-paravirt compiles - since kernel_rpl is statically defined to be zero
there, and only non-zero rpl kernel have a problem restoring IOPL, as popf
does not restore IOPL flags unless run at CPL-0.

Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

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