> From: Paul Durrant [mailto:paul.durr...@citrix.com] > Sent: Thursday, September 20, 2018 10:12 PM > > Commit 43d1622b "vtd: add lookup_page method to iommu_ops" added a > lookup method in to the VT-d IOMMU implementation. In some cases (such > as > when shared EPT is in operation) that function simply passes back an > identity MFN (i.e. an MFN with the same value as the DFN that was passed > in), but this doesn't actually make a lot of sense. If, for instance, > shared EPT is used then really the function should be doing a P2M lookup > since DFN space will be identical to GFN space. > > In practice there are no current callers of the lookup_page method and, > when PV-IOMMU support is added, the method will not be called if either > shared EPT is in operation or iommu_passthrough is set, so this patch > simply fails the method with -EOPNOTSUPP in those cases. > > Signed-off-by: Paul Durrant <paul.durr...@citrix.com>
Acked-by: Kevin Tian <kevin.t...@intel.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
