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Konrad Dybcio
2b73b83cb8
On RPMh-based SoCs, the APPS SMMU advertizes support for cache-coherent pagetable walk via the IDR0 register. This however is not respected by the arm-smmu driver unless dma-coherent is set. Mark the node as dma-coherent to ensure this (and other) implementations take this coherency into account. Signed-off-by: Konrad Dybcio <quic_kdybcio@quicinc.com> Tested-by: Steev Klimaszewski <steev@kali.org> # Thinkpad X13s (sc8280xp) Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on sdm845-rb3 Link: https://lore.kernel.org/r/20240919-topic-apps_smmu_coherent-v1-4-5b3a8662403d@quicinc.com Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.