[U-Boot] [PATCH 3/4] sunxi: Add default partition scheme

[Maxime Ripard]

Hi,

On Fri, Nov 17, 2017 at 03:20:03PM +0100, Alexander Graf wrote:
> 
> 
> On 17.11.17 14:04, Maxime Ripard wrote:
> > On Fri, Nov 17, 2017 at 12:21:49PM +0000, Andre Przywara wrote:
> >> Hi,
> >>
> >> On 17/11/17 08:27, Maxime Ripard wrote:
> >>>
> >>> I guess I also have a side question here. How do the installers deal
> >>> with the ESP partition? Would they create a new filesystem on it no
> >>> matter what, or are they a bit smarter than that?
> >>
> >> I would expect any installer to not mess with the ESP. After all the ESP
> >> belongs to the firmware, and multiboot (both multiple Linux versions as
> >> well as other OSes like Windows or BSD) is one main feature of the ESP.
> >>
> >> The only exception might be if the ESP is not formatted.
> >>
> >>> My actual question being what will happen if one stores the U-Boot
> >>> environment on that partition, and then runs an installer? Would the
> >>> environment be gone?
> >>
> >> I would say that the ESP is a perfect place for the environment. It's
> >> FAT and it belongs to firmware, so OSes are just expected to *add* their
> >> bootloaders, without touching any other file on it.
> > 
> > Ok, perfect then, thanks!
> 
> Please make sure to
> 
>   a) Format it as FAT and

That might be the toughest part :)

AFAIK, u-boot is not able to format any filesystem. We could just
flash a raw FAT filesystem though, but looking into it might help for
the environment discussion.

>   b) Mark it with the ESP GUID

That's easy thouh. What is this GUID?

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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