Han, Weidong
2009-Jun-12 05:15 UTC
[Xen-devel] [patch 1/2] Fix flush for SRTP and SIRTP set
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@intel.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel