[Xen-devel] [PATCH] AMD IOMMU: Defer IO pagetable construction until device assignment

[Wei Wang2 <wei.wang2@xxxxxxx>]

During HVM domain creation, I/O page tables are filled by coping p2m
entries from p2m table, which is a useless step for non-passthru domain.
This patch defers I/O page table construction until the moment of device
assignment. In case that pci devices are never assigned or hot plugged,
the unnecessary duplication will be avoid. 

Wei

Signed-off-by: Wei Wang <wei.wang2@xxxxxxx>

-- 
AMD Saxony, Dresden, Germany
Operating System Research Center

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Attachment: defer_p2m.patch
Description: Text Data

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