[PATCH v1 0/1] Fix booting kernels with ATAGS and extlinux

[Svyatoslav]

25 січня 2024 р. 16:12:36 GMT+02:00, Tom Rini <trini at konsulko.com> написав(-ла):
>On Thu, Jan 25, 2024 at 08:51:09AM +0200, Svyatoslav wrote:
>> 
>> 
>> 25 січня 2024 р. 08:29:54 GMT+02:00, Dan Carpenter <dan.carpenter at linaro.org> написав(-ла):
>> >On Wed, Jan 24, 2024 at 10:27:30PM +0200, Svyatoslav Ryhel wrote:
>> >> Currently, if boot with extlinux.conf and do not set the fdt
>> >> U-Boot will provide its own device tree. This behavior is
>> >> beneficial if the U-Boot device tree is in sync with Linux,
>> >> but it totally halts the booting of pre-dtb kernels (3.4 for
>> >> example) since it uses ATAGs. To fix this, pass `-` in the
>> >> fdt extlinux field as a signal that no tree should be used.
>> >
>> >Passing - doesn't seem like the most intuitive thing...  Is there a
>> >different argument we could use?
>> >
>> 
>> I agree that `-` is not the most intuitive argument,
>> but this is a way to implement a fix with the least
>> code posssible. To make this less obscure I have
>> adjusted documentation. 
>
>It's also how historically we do similar things. eg, "bootm
>$kernel_addr_r - $fdt_addr_r". My question is can we re-work this,
>cleanly, with guards around SUPPORT_PASSING_ATAGS to not increase size
>anywhere that doesn't need this legacy case.
>

Which behavior you propose?