Re: [Xen-devel] [PATCH] arm64:renesas: Introduce early console for Salvator-X board

[Julien Grall <julien.grall@xxxxxxx>]

Hello,

On 09/11/16 07:14, Dirk Behme wrote:
> On 08.11.2016 16:41, Iurii Mykhalskyi wrote:
> > Hello Dirk,
> >
> > I have made only single change - I recompile ATF to leave CPU in EL2
> > mode and reflash it.
>
> Yes, this is what I meant with 'modifying firmware' ;)
>
> You are loading Xen with U-Boot running in EL2, then?
>
> With this modification, do all other use cases still work? E.g. load and
> boot U-Boot and native Linux kernel without Xen?
Yes, when Linux is booting from EL2, it will drop to EL1 (see 
el2_setup). As Andre mentioned on the previous thread, U-boot is running 
at EL2 on various board (e.g pine64, juno).
Modifying the firmware was the right way to go as there is no solution 
go boot at EL2 from EL1.
Regards,

--
Julien Grall

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