On Sun, Oct 03, 2021 at 04:09:56AM +0300, Dmitry Osipenko wrote: > 23.04.2021 19:32, Thierry Reding пишет: > > I've made corresponding changes in the proprietary bootloader, added a > > compatibility shim in U-Boot (which forwards information created by the > > proprietary bootloader to the kernel) and the attached patches to test > > this on Jetson TX1, Jetson TX2 and Jetson AGX Xavier. > > Could you please tell what downstream kernel does for coping with the > identity mappings in conjunction with the original proprietary bootloader? > > If there is some other method of passing mappings to kernel, could it be > supported by upstream? Putting burden on users to upgrade bootloader > feels a bit inconvenient.
It depends on the chip generation. As far as I know there have been several iterations. The earliest was to pass this information via a command-line option, but more recent versions use device tree to pass this information in a similar way as described here. However, these use non-standard DT bindings, so I don't think we can just implement them as-is. Thierry
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