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3b6bb5b705
Currently, the IPMMU/VMSA driver supports 32-bit I/O Virtual Addresses only, and thus sets io_pgtable_cfg.ias = 32. However, it doesn't force a 32-bit IOVA space through the IOMMU Domain Geometry. Hence if a device (e.g. SYS-DMAC) rightfully configures a 40-bit DMA mask, it will still be handed out a 40-bit IOVA, outside the 32-bit IOVA space, leading to out-of-bounds accesses of the PGD when mapping the IOVA. Force a 32-bit IOMMU Domain Geometry to fix this. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.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.