[Xen-devel] [patch 1/2] Fix flush for SRTP and SIRTP set

["Han, Weidong" <weidong.han@xxxxxxxxx>]

SRTP (Set Root Table Pointer) operation must be set before enable or re-enable 
DMA remapping. And after set it, software must globally invalidate the 
context-cache and then globally invalidate the IOTLB. This is required to 
ensure hardware uses only the remapping structures referenced by the new 
root-table pointer, and not stale cached entries. Similarly, SIRTP (Set 
Interrupt Remap Table Pointer) operation must be set before enable or re-enable 
Interrupt remapping, and after set it, software must globally invalidate the 
interrupt entry cache. 
        
This patch adds global context and iotlb flush after set root entry, and 
globally flushs interrupt entry cache before enabling Interrupt remapping. And 
remove the iommu_flush_all in iommu_resume becuase it becomes redundant after 
adds flush for SRTP in init_vtd_hw.

Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>

Attachment: flush.patch
Description: flush.patch

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