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8668d80571
From chip design point of view, ATS support wasn't implemented in EP mode, but leaving ATS cap available for both of EP and RC mode is totally broken if servers active IOMMU and ATS support. Reports state the problem are: (1)When running the rk3588 in endpoint mode, with an Intel host with IOMMU enabled, the host side prints: DMAR: VT-d detected Invalidation Time-out Error: SID 0 (2)When running the rk3588 in endpoint mode, with an AMD host with IOMMU enabled, the host side prints: iommu ivhd0: AMD-Vi: Event logged [IOTLB_INV_TIMEOUT device=63:00.0 address=0x42b5b01a0] Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> Change-Id: I7763f304bb3b71c11a67579803b2531ab7538133
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.