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d87beb7492
When a PCI device has DMA quirks, we need to ensure that an upstream IOMMU knows about all possible aliases, since the presence of a DMA quirk does not preclude the device still also emitting transactions (e.g. MSIs) on its 'real' RID. Similarly, the rules for bridge aliasing are relatively complex, and some bridges may only take ownership of transactions under particular transient circumstances, leading again to multiple RIDs potentially being seen at the IOMMU for the given device. Take all this into account in the OF code by translating every RID produced by the alias walk, not just whichever one comes out last. Happily, this also makes things tidy enough that we can reduce the number of both total lines of code, and confusing levels of indirection, by pulling the "iommus"/"iommu-map" parsing helpers back in-line again. Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> |
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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.