| commit | 18f23409909a9547ac7c149013286f36fcffa433 | |
| author | Robin Murphy <robin.murphy@arm.com> | |
| Tue, 25 Nov 2014 17:50:55 +0000 (25 17:50 +0000) | ||
| committer | Joerg Roedel <jroedel@suse.de> | |
| Tue, 2 Dec 2014 12:05:04 +0000 (2 13:05 +0100) | ||
| tree | 898b6a507099ba1e47184462bacb9c7990f4ca51 | treesnapshot (tar.gz zip) |
| parent | 0690cbd2e55a72a8eae557c389d1a136ed9fa142 | commitdiff |
iommu: Decouple iommu_map_sg from CPU page size
If the IOMMU supports pages smaller than the CPU page size, segments
which lie at offsets within the CPU page may be mapped based on the
finer-grained IOMMU page boundaries. This minimises the amount of
non-buffer memory between the CPU page boundary and the start of the
segment which must be mapped and therefore exposed to the device, and
brings the default iommu_map_sg implementation in line with
iommu_map/unmap with respect to alignment.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
If the IOMMU supports pages smaller than the CPU page size, segments
which lie at offsets within the CPU page may be mapped based on the
finer-grained IOMMU page boundaries. This minimises the amount of
non-buffer memory between the CPU page boundary and the start of the
segment which must be mapped and therefore exposed to the device, and
brings the default iommu_map_sg implementation in line with
iommu_map/unmap with respect to alignment.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
| drivers/iommu/iommu.c | diffblobblamehistory |