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94a9921e2c
AMD IOMMU reserves the address range 0xfd00000000-0xffffffffff for the hypertransport protocol (HT) and has special meaning. Hence devices cannot use this address range for the DMA. However on some AMD platforms this HT range is shifted to the very top of the address space and new feature bit `HTRangeIgnore` is introduced. When this feature bit is on, IOMMU treats the GPA access to the legacy HT range as regular GPA access. Signed-off-by: Sairaj Kodilkar <sarunkod@amd.com> Reviewed-by: Vasant Hegde <vasant.hegde@amd.com> Link: https://lore.kernel.org/r/20250317055020.25214-1-sarunkod@amd.com Signed-off-by: Joerg Roedel <jroedel@suse.de> |
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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.