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The APM X-Gene PCIe root port does not support ACS at this point. However, the hardware provides isolation and source validation through the SMMU. The stream ID generated by the PCIe ports contain both the bus/device/ function number as well as the port ID in its 3 most significant bits. Turn on ACS but disable all the peer-to-peer features. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Alex Williamson <alex.williamson@redhat.com> Acked-by: Tanmay Inamdar <tinamdar@apm.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.