[coreboot] kernel payload

[ron minnich]

neat! Do you have serial console or  just graphics?

We've been doing a lot of this linux payload stuff lately. I assume you can
recover from a bad image. If so, I'd recommend building a kernel with
kerneltiny config
(or whatever it's called -- tinykernel?), add back in console support of
your choice, set the command line in menuconfig for earlypintk=tty0 or
ttyS0,keep and boot it and see how far it gets. the kerneltiny configf can
get you to a 400K bzImage so it's worth the effort to start small and grow
it up -- that's how we've done it in my project at Google (not a chromeos
project, though I'll be talking about it this fall).

To give you an idea of just how far the tiny kernel stuff goes, it removes
all tests for uid != 0 and also all options to set uid to !0. This makes
sense in a firmware payload. There's a lot of space saving options in that
config and that's how you get a tiny kernel.

Once you get past this point you can then look at what initramfs to add. Or
maybe you are past that point, but let's talk. I've been doing this a lot
for the past year and I have probably made lots of mistakes I can help you
avoid ...

BTW, I'm looking for people to work with on a project embedding Linux and a
Go userland in flash, so if anyone out there wants to get involved, please,
we need your brains. see u-root.tk.



On Fri, May 5, 2017 at 11:02 AM Healer64 <Healer64 at protonmail.com> wrote:

> Yes, I currently have a grub payload that mostly works.
>
>
> Sent with ProtonMail <https://protonmail.com> Secure Email.
>
> -------- Original Message --------
> Subject: Re: [coreboot] kernel payload
> Local Time: May 5, 2017 11:25 AM
> UTC Time: May 5, 2017 5:25 PM
> From: rminnich at gmail.com
> To: Healer64 <Healer64 at protonmail.com>, coreboot at coreboot.org <
> coreboot at coreboot.org>
>
> OK, so you told me off-list it's an auron.
>
> Did you try the full build/boot cycle with an unmodified coreboot first?
>
>
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