iommu/amd: flush IOTLB for specific domains only (v2)

[Joseph Salisbury]

Hello Arindam,

There is a bug report[0] that you created a patch[1] for a while back. 
However, the patch never landed in mainline.  There is a bug reporter in
Ubuntu[2] that is affected by this bug and is willing to test the
patch.  I attempted to build a test kernel with the patch, but it does
not apply to currently mainline cleanly.  Do you still think this patch
may resolve this bug?  If so, is there a version of your patch available
that will apply to current mainline?

Thanks,

Joe

[0] https://bugs.freedesktop.org/show_bug.cgi?id=101029
[1] https://patchwork.freedesktop.org/patch/157327/
[2] http://pad.lv/1747463