tree c3f29ee274a0e6b70f7edfbbcadbd1bcea947d3b
parent 8a64b6fbdbbf32dafe84ff8d8c74a3a79f1ae169
author Werner Zeh <werner.zeh@siemens.com> 1549020771 +0100
committer Werner Zeh <werner.zeh@siemens.com> 1549348484 +0000

intel/apollolake: Add parameter to enable VTD in devicetree

The FSP has a parameter to enable or disable the VTD feature
(Intel's Virtualization Technology for Directed I/O). In current header
files for FSP-S (Apollo Lake and Gemini Lake) this parameter is set to
disabled per default. Therefore, if the FSP was not modified via BCT,
this feature is most likely disabled on all mainboards.

Add a chip parameter so that VTD can be enabled on mainboard level in
devicetree and therefore this feature can be activated if needed.

Change-Id: Ic0bfcf1719e1ccc678a932bf3d38c6dbce3556bc
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/31194
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>