[SRU][F/J/L] [PATCH 0/1] enable Renesas RZ platform serial installer

[Andrea Righi]

On Mon, Aug 14, 2023 at 07:02:06AM -0600, Tim Gardner wrote:
> On 8/14/23 1:13 AM, Andrea Righi wrote:
> > BugLink: https://bugs.launchpad.net/bugs/2022361
> > 
> > [Impact]
> > 
> > The ubuntu installer does not work via serial ports for Renesas boards
> > like RZ/G2M-HiHope
> > (https://www.renesas.com/us/en/products/microcontrollers-microprocessors/rz-mpus/rzg2m-hihope-rzg2m-reference-board,
> > RZ/G2L, RZ/G2LC, RZ/G2UL SMARC Board
> > (https://renesas.info/wiki/RZ-G/RZ-G2L_SMARC).
> > 
> > The installation can be done using HDMI ports, but it would be nice to
> > support installation via serial port as well.
> > 
> > [Test case]
> > 
> > Try to install Ubuntu on a Renesas board.
> > 
> > [Fix]
> > 
> > Statically build SuperH SCI(F) serial port support (with earlyconsole).
> > 
> > [Regression potential]
> > 
> > Statically building an additional driver in the kernel can make the
> > kernel image bigger, potentially causing boot issues in small (arm64 /
> > armhf) platforms.
> > 
> > 
> 
> Why would we do this for kernels older then Lunar ? If a cloud developer is
> not vigilant, it will also affect the size of cloud images given the new
> annotations scheme (if the derivative includes from debian.master).

If anyone wants to install focal in those Renesas boards it requires
this change.

But your point is really valid, this should be applied only to generic,
now that the derivatives are all (almost) importing all the configs from
generic, it would be up to the individual maintainers of each cloud
kernel to turn this off in the specific cloud kernel annotations.

At the moment we don't have a way to say "do not propagate this config
to derivative kernels", I'm wondering if something like this might be
useful.

-Andrea