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aa807b9f22
When porting a cma related usage from x86_64 server to arm64 server, the "cma=4G@4G" setup failed on arm64. The reason is arm64 and some other architectures have specific physical address limit for reserved cma area, like 4GB due to the device's need for 32 bit dma. Actually lots of platforms of those architectures don't have this device dma limit, but still have to obey it, and are not able to reserve a huge cma pool. This situation could be improved by honoring the user input cma physical address than the arch limit. As when users specify it, they already knows what the default is which probably can't suit them. Suggested-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Feng Tang <feng.tang@linux.alibaba.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Link: https://lore.kernel.org/r/20250612021417.44929-1-feng.tang@linux.alibaba.com |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
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.