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For devices connecting to an ITS, the devices need to identify themself through a devid; this devid is represented in the IORT table in named component node [1] for platform devices, so this patch adds code that scans the IORT table to retrieve the devices devid. Add an IORT interface to collect ITS devices devid to carry out platform devices MSI mappings with IORT tables. [1]: https://static.docs.arm.com/den0049/b/DEN0049B_IO_Remapping_Table.pdf Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> [lorenzo.pieralisi@arm.com: rewrote commit log/dropped ITS changes] Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Ming Lei <ming.lei@canonical.com> Tested-by: Wei Xu <xuwei5@hisilicon.com> Tested-by: Sinan Kaya <okaya@codeaurora.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Tomasz Nowicki <tn@semihalf.com> Cc: Thomas Gleixner <tglx@linutronix.de>
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.