tree 8f3f3951c85aa3ecf8d450587990a4bbe348f7bf
parent 997409d3d0bd6894f33e31ced251c0fdf523aa14
author Jeremy Fitzhardinge <jeremy@goop.org> 1215554821 -0700
committer Ingo Molnar <mingo@elte.hu> 1216198966 +0200

xen64: add pvop for swapgs

swapgs is a no-op under Xen, because the hypervisor makes sure the
right version of %gs is current when switching between user and kernel
modes.  This means that the swapgs "implementation" can be inlined and
used when the stack is unsafe (usermode).  Unfortunately, it means
that disabling patching will result in a non-booting kernel...

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>