From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Tue, 8 Jul 2008 22:07:16 +0000 (-0700)
Subject: xen: implement Xen write_msr operation
X-Git-Tag: v2.6.27-rc1~955^2~1^20~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1153968a48e3ca3e2b7a437e8b82ec9e6f768e24;p=pandora-kernel.git

xen: implement Xen write_msr operation

64-bit uses MSRs for important things like the base for fs and
gs-prefixed addresses.  It's more efficient to use a hypercall to
update these, rather than go via the trap and emulate path.

Other MSR writes are just passed through; in an unprivileged domain
they do nothing, but it might be useful later.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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