| commit | b75fe4e5b869f8dbebd36df64a7fcda0c5b318ed | [log] [tgz] |
|---|---|---|
| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | Mon Sep 21 13:34:06 2009 -0700 |
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | Mon Sep 21 13:49:43 2009 -0700 |
| tree | cba533110e8514184ddc63ab2ea37c38dc8a1861 | |
| parent | 79b520e87e1214cfa107bdc8528b5d6c055a8b82 [diff] |
xen: check EFER for NX before setting up GDT mapping x86-64 assumes NX is available by default, so we need to explicitly check for it before using NX. Some first-generation Intel x86-64 processors didn't support NX, and even recent systems allow it to be disabled in BIOS. [ Impact: prevent Xen crash on NX-less 64-bit machines ] Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stable Kernel <stable@kernel.org>