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

[Dirk Behme <dirk.behme@xxxxxxxxxxxx>]

On 09.11.2016 13:14, Julien Grall wrote:
> 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.

Yes, correct, from general point of view :)

My question to Iurii is more focused to this concrete board, if there 
everything works fine, too. You know, sometimes the implementation on a 
board might have bugs while it should work well in theory ;)
So I'm just interested if everything works fine for him switching ATF to 
exit in EL2, or if additional fixes/patches are needed for this board.
Best regards

Dirk

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