#
# Copyright 2014, General Dynamics C4 Systems
#
# This software may be distributed and modified according to the terms of
# the GNU General Public License version 2. Note that NO WARRANTY is provided.
# See "LICENSE_GPLv2.txt" for details.
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* Intel VT-d (I/O MMU) support

Intel VT-d support in seL4 was tested for the following chipsets:
- Intel Q35 Express
- Intel 5500

On other chipsets with Intel VT-d support, seL4 might:
- complain and disable IOMMU support
- hang during bootstrapping
- have some weird behaviour during runtime

In any case, the workaround is to disable VT-d support, either:
- in the BIOS, or
- by including "disable_iommu" into the MultiBoot (e.g. GRUB) command line
  as described in the seL4 documentation