tree 5071c3eb86544af5e798ec134d2d2a6b957c1dff
parent 33f5b5ea25d3034479eef509ad08e999dcd86369
author Aditya Basu <mitthu@google.com> 1566003603 -0400
committer Barret Rhoden <brho@cs.berkeley.edu> 1566232749 -0400

iommu: add support for iotlb shootdowns and write-buffer flushing

* Add fields to struct iommu which are set during initialization
* Add the necessary functions
* Will also need another function to perform global iotlb flushes
* Also look into Queue Invalidation (QI) for device IOTLBs. Currently we
  do not allow device IOTLBs to be populated. For device IOTLBs we need
  to set the TRANS_TYPE to 0x01.

Signed-off-by: Aditya Basu <mitthu@google.com>
Signed-off-by: Barret Rhoden <brho@cs.berkeley.edu>