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

[Dirk Behme <dirk.behme@xxxxxxxxxxxx>]

On 10.11.2016 10:25, Iurii Mykhalskyi wrote:
> Hello Dirk,
>
> On Thu, Nov 10, 2016 at 8:54 AM, Dirk Behme <dirk.behme@xxxxxxxxxxxx
> <mailto:dirk.behme@xxxxxxxxxxxx>> wrote:
>
>     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.
>
>
> Looks like all basic functions working normally - I have successfully
> load linux & rootfs without any additional patches for linux kernel.

Ok, thanks for this info :)


> As you ok with this - I will create Salvator-X board related page on Xen
> wiki.
> But first of all, I will update yocto layer mentioned by Andrii with
> minimal setup, based on the latest Renesas & Xen releases.
> This should be helpful for easier out of box board setup.

Ack

Best regards

Dirk



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