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[ Upstream commit3d68bbb81b] We need to save/restore the TCR/TTBR registers, since they are lost on power gate. Reviewed-by: Sven Peter <sven@svenpeter.dev> Signed-off-by: Hector Martin <marcan@marcan.st> Link: https://lore.kernel.org/r/20230113105029.26654-3-marcan@marcan.st Signed-off-by: Joerg Roedel <jroedel@suse.de> Stable-dep-of:cf5c1c87c2("iommu/dart: Fix apple_dart_device_group for PCI groups") Signed-off-by: Sasha Levin <sashal@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 Restructured Text 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.