tree 0ed71f5570dba0a118ff42d4a8ba50f72fbbf8ff
parent 2cc14f52aeb78ce3f29677c2de1f06c0e91471ab
author Laurentiu Tudor <laurentiu.tudor@nxp.com> 1695741960 +0300
committer Joerg Roedel <jroedel@suse.de> 1701076966 +0100

iommu: Map reserved memory as cacheable if device is coherent

Check if the device is marked as DMA coherent in the DT and if so,
map its reserved memory as cacheable in the IOMMU.
This fixes the recently added IOMMU reserved memory support which
uses IOMMU_RESV_DIRECT without properly building the PROT for the
mapping.

Fixes: a5bf3cfce8cb ("iommu: Implement of_iommu_get_resv_regions()")
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20230926152600.8749-1-laurentiu.tudor@nxp.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>