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| author | Jernej Skrabec <jernej.skrabec@gmail.com> | 2022-10-25 19:54:15 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-11-03 17:45:44 +0300 |
| commit | e563cc0c787c85a4d9def0a77078dc5d3f445e3d (patch) | |
| tree | d305926696372393c8c04c839a78a85b1be23a55 /init | |
| parent | 67a8a67f9eceb72e4c73d1d09ed9ab04f4b8e12d (diff) | |
| download | linux-e563cc0c787c85a4d9def0a77078dc5d3f445e3d.tar.xz | |
iommu/sun50i: Implement .iotlb_sync_map
Allocated iova ranges need to be invalidated immediately or otherwise
they might or might not work when used by master or CPU. This was
discovered when running video decoder conformity test with Cedrus. Some
videos were now and then decoded incorrectly and generated page faults.
According to vendor driver, it's enough to invalidate just start and end
TLB and PTW cache lines. Documentation says that neighbouring lines must
be invalidated too. Finally, when page fault occurs, that iova must be
invalidated the same way, according to documentation.
Fixes: 4100b8c229b3 ("iommu: Add Allwinner H6 IOMMU driver")
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20221025165415.307591-6-jernej.skrabec@gmail.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions