CLI: Using -bios AND -kernel

[Philippe Mathieu-Daudé]

Hi John / Paolo / Markus,

On 10/19/21 12:07, BALATON Zoltan wrote:
> On Tue, 19 Oct 2021, Christophe Leroy wrote:
>> Le 19/10/2021 à 11:39, Thomas Huth a écrit :
>>> On 19/10/2021 11.31, Christophe Leroy wrote:
[...]
>> I use the following command, but it does nothing, it stays in uboot
>> prompt as when I don't get a kernel argument
>>
>>     ~/qemu/build/qemu-system-ppc -M taihu -bios
>> ~/Téléchargements/u-boot.bin -serial null -serial mon:stdio -kernel
>> arch/powerpc/boot/uImage
> 
> I'm not sure using -bios and -kernel together makes sense, it probably
> starts u-boot in this case and you have to load and start the kernel
> from u-boot as you'd notmally do on a real machine. Alternatively you
> could use -kernel instead of -bios which then loads a kernel and starts
> it directly but not sure if it needs a firmware to work.
> 
> Ot I could be completely wrong as I don't know this machine and haven't
> tried it.

Usually -bios overwrites -kernel/-append cmdline options.
Having them accepted together is probably a configuration mistake,
and we should reject that (generically).

You guys have been working on the CLI recently, is there an easy
way to not allow such combination?

Thanks,

Phil.