Re: [PATCH 8/8] board: add support for Qualcomm SA8155P-ADP board

[Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>]

Hi Stephan,

Stephan Gerhold <stephan@gerhold.net> writes:

[...]
>> +This approach ensures that U-Boot is booted in EL2 and it is possible
>> +to run virtualization software (like Xen or KVM) on the board. You
>> +must understand that this approach breaks Qualcomm's boot chain. You
>> +will not be able to call all subsequent loaders, so you will not be
>> +able to use fastboot for example. Use this approach only if you want
>> +to experiment with virtualization on SA8155P-ADP.
>> +
>> +We need to create ELF file from the u-boot binary. We can't use
>> +existing U-Boot ELF, because it does not include appended DTB
>> +file. Easiest way to do this is to use ``create_elf.py`` from the
>> +following repository: `qtestsign(lorc)
>> +<https://urldefense.com/v3/__https://github.com/lorc/qtestsign/tree/create_elf__;!!GF_29dbcQIUBPA!3iokDDZXQGZNS3GK2oGM-SU5Trj8ZSmx5FY-uvFKY0LDzDLh8LSVkBNS5r9QX-LGFKObs1tNmLdELls6iGQPZ3Aq$
>> [github[.]com]>`_: ::
>> +
>> +	$ python ../qtestsign/create_elf.py u-boot.bin 0x85710000 u-boot.mbn
>> +
>
> Have you tried using CONFIG_REMAKE_ELF in U-Boot? That should
> effectively do the same (build a new ELF based on u-boot.bin with the
> appended device tree). The Qualcomm DragonBoard 410c port is using that
> option to solve the same problem.

I didn't knew that there is a such option. Looks like this is exactly
what I need, thank you. I'll include this in the V2.

> But I'm glad to see that the ELF abstractions in qtestsign worked well
> for your purpose. :-)

Well, I was surprised that pyelf can parse ELF files but can't modify
them. So your tool come in handy. I was going to make a PR that adds
this create_elf.py script, but looks like we don't need it.

-- 
WBR, Volodymyr