On Wed, Jan 08, 2025 at 10:04:07AM -0700, Simon Glass wrote:
Hi Tom,
On Fri, 20 Dec 2024 at 13:48, Tom Rini trini@konsulko.com wrote:
On Fri, Dec 20, 2024 at 10:37:34AM -0700, Simon Glass wrote:
Hi Tom,
On Fri, 20 Dec 2024 at 10:23, Tom Rini trini@konsulko.com wrote:
On Fri, Dec 20, 2024 at 10:18:17AM -0700, Simon Glass wrote:
Hi Tom,
On Fri, 20 Dec 2024 at 07:56, Tom Rini trini@konsulko.com wrote:
On Thu, Dec 19, 2024 at 09:01:19PM -0700, Simon Glass wrote:
> The current localboot implementation assumes that a 'localcmd' > environment variable is provided, with the instructions to follow. This > may not be included, so provide a fallback in that case. > > Add a test image and test as well. > > Signed-off-by: Simon Glass sjg@chromium.org
This is a pretty niche feature, I had to dig around a bit to see how it's specified elsewhere (not really) and how it's used. And I think that based on how it's used, making up a bootcmd when localcmd is undefined is the wrong approach. It's the hook for "run what I defined in the environment", so if not set erroring back out seems appropriate.
Yes, but unfortunately it seems to be used and we should support it. The problem with scripts is that we don't know the boot device, etc, so it needs to be integrated into PXE. I did consider putting something in bootstd, but we only find out that it is requesting a localboot when actually running the extlinux bootmeth, so this is what I came up with.
It will be interesting to see if any other cases come up.
It would be helpful at this point I think if you can point to how the code for handling this case (the LOCALBOOT keyword followed by an integer) in other projects so that we can be compliant with what's expected, even if it's poorly documented.
Yes, it seems very hard to find anything at all.
The implementation in syslinux uses the BIOS to jump to a boot sector:
https://repo.or.cz/syslinux.git/blob/HEAD:/core/bios/localboot.c
I'm really not sure how it is supposed to work with a filesystem.
[1] is a usage of it for rpi
Yes, I did some searching on extlinux.conf and localboot and got a few hits on people using localcmd for when they need to run their own special thing, for various reasons, for example: https://stackoverflow.com/questions/54258960/applying-fdt-overlay-with-u-boo...
But other than that, even Gemini doesn't seems to have much idea.
I'm only half surprised it didn't make something up for it.
I've been quite amazed at its capabilities recently. I can mostly get good answers to quite complex questions and it is very fast now. I'm just waiting for when I can start using it for development.
Oh no, please no. We don't have a policy yet, but no "AI" created code, please.
I wonder who maintains the extlinux stuff. Do you have any idea? It would be nice to move it into a git tree and generate the spec from there.
I would say the syslinux project should be the authority unless they say otherwise.