[Xen-devel] [PATCH] AMD IOMMU: Hanlde sibling device assignment correctly

[Wei Wang2 <wei.wang2@xxxxxxx>]

Devices on AMD IOMMU system share a same set of IO page tables if they
are indexed by a same device ID in device table. To prevent these
sibling devices from being assigned to different domains, a successful
device assignment requires all sibling devices are owned by  either
pciback or the target domain. This is a trial patch with minor
modifications in the common interface to handle this situation
correctly.  VTD code has also been slightly touched please let me know
if it breaks any VTD functionality. Thanks!

Wei

Signed-off-by: Wei Wang <wei.wang2@xxxxxxx>
-- 
AMD Saxony, Dresden, Germany
Operating System Research Center

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Attachment: device_assignment.patch
Description: Text Data

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