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[ Upstream commitc0474a606e] When the Intel IOMMU is operating in the scalable mode, some information from the root and context table may be used to tag entries in the PASID cache. Software should invalidate the PASID-cache when changing root or context table entries. Suggested-by: Ashok Raj <ashok.raj@intel.com> Fixes:7373a8cc38("iommu/vt-d: Setup context and enable RID2PASID support") Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20210320025415.641201-4-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel <jroedel@suse.de> 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.