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The SMMUv3 architecture permits caching of data structures deemed to be "reachable" by the SMU, which includes STEs marked as invalid. When transitioning an STE to a bypass/fault configuration at init or detach time, we mistakenly elide the CMDQ_OP_CFGI_STE operation in some cases, therefore potentially leaving the old STE state cached in the SMMU. This patch fixes the problem by ensuring that we perform the CMDQ_OP_CFGI_STE operation irrespective of the validity of the previous STE. Reviewed-by: Robin Murphy <robin.murphy@arm.com> Reported-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.