diff options
| author | Robin Murphy <[email protected]> | 2020-09-22 15:16:48 +0100 |
|---|---|---|
| committer | Neil Armstrong <[email protected]> | 2020-10-30 10:08:08 +0100 |
| commit | 728da60da7c1ec1e21ae64648e376666de3c279c (patch) | |
| tree | da46f73386480cbb537fcfedcab4e229a902ce51 /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py | |
| parent | fa3bfa3527b31562dba28d49c0a18b722b42e226 (diff) | |
iommu/io-pgtable-arm: Support coherency for Mali LPAE
Midgard GPUs have ACE-Lite master interfaces which allows systems to
integrate them in an I/O-coherent manner. It seems that from the GPU's
viewpoint, the rest of the system is its outer shareable domain, and so
even when snoop signals are wired up, they are only emitted for outer
shareable accesses. As such, setting the TTBR_SHARE_OUTER bit does
indeed get coherent pagetable walks working nicely for the coherent
T620 in the Arm Juno SoC.
Signed-off-by: Robin Murphy <[email protected]>
Tested-by: Neil Armstrong <[email protected]>
Reviewed-by: Steven Price <[email protected]>
Acked-by: Will Deacon <[email protected]>
Signed-off-by: Neil Armstrong <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/8df778355378127ea7eccc9521d6427e3e48d4f2.1600780574.git.robin.murphy@arm.com
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py')
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