From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Mon, 17 Mar 2008 23:37:17 +0000 (-0700)
Subject: xen: support sysenter/sysexit if hypervisor does
X-Git-Tag: v2.6.26-rc1~1065^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e2a81baf6604a2e08e10c7405b0349106f77c8af;p=pandora-kernel.git

xen: support sysenter/sysexit if hypervisor does

64-bit Xen supports sysenter for 32-bit guests, so support its
use.  (sysenter is faster than int $0x80 in 32-on-64.)

sysexit is still not supported, so we fake it up using iret.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

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