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Loading IORT table from initrd can be used to fix severe firmware IORT defects temporarily before platform/BIOS vendor releases an upgraded BIOS binary. Moreover, it is very powerful to debug SMMU node/device probe, MSI allocation, stream id translation and IORT table from firmware. It is also very useful to enable SMMU and devices behind SMMU before firmware is ready. This patch adds ACPI_SIG_IORT to the table, which enables IORT from initrd to override which from firmware. Signed-off-by: Yang Shunyong <shunyong.yang@hxt-semitech.com> Acked-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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| README | ||
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.