Hi Simon, [...]
> > >>> > > >> > > > > > > Can we use the best-match compatible approach as expected by the new > > > 'make image.fit' in Linux? > > > > > > Filenames should be deprecated IMO. I am happy to help work on how to > > > do that if you agree. > > > > Hello Simon, > > > > It is the OS that creates boot options. The OS can determine the exact > > dtb file based on the compatible string and the kernel version once per > > kernel upgrade. This is much more efficient than doing the same on every > > boot. > > > > Replacing $fdtfile by a matching logic could make sense. But please > > consider the effect on boot time if have to read through more than 1000 > > arm64 dtbs with U-Boot's non-caching file-system drivers. > > The suggested option here is to use FIT, which is very fast at > scanning the files. Please see [1] > > Failing that, we could implement a way (in FIT) of specifying that the > FDT is in an external file. In that case FIT would become a mapping > from compatible strings to filenames. This is kind of irrelevant to FIT. This is how the efibootmgr configures the files it has to load. commit 76e8acce12fe, commit 53f6a5aa8626, and doc/develop/uefi/uefi.rst, Chapter Load file 2 protocol has enough information of how the initrd is implemented. What Heinrich is doing here is extending the existing code to load a DT Regards /Ilias > > Regards, > Simon > > [1] > https://github.com/open-source-firmware/flat-image-tree/blob/main/source/chapter3-usage.rst
