On Thu, Jan 21, 2016 at 11:49 AM, Kitestramuort kitestramuort@autistici.org wrote:
On Thu, 21 Jan, 2016 at 4:08 PM, Aaron Durbin via coreboot coreboot@coreboot.org wrote:
You can always kexec() into your new kernel. The one sitting in flash can be smart enough to interrogate your boot media and determine what to load. Then just kexec().
This is very interesting. So basically I should build a minimal kernel with kexec support to launch the "normal" kernel living in /boot. But what exactly needs to be compiled in the payload kernel? I guess some hardware has to be initialised at this stage... Can I compile it 64bit? Is there any further documentation on this?
You'd need an initramfs along w/ your storage drivers for finding the boot device. You'd want to make your userspace smart enough such that you could potentially recover if you ever landed a bad kernel. In short, you'd need to duplicate what lilo or grub do depending how you want to convey all that boot information (and allow a chance at recovery).
I found something on the wiki https://www.coreboot.org/Board:tyan/s2891#LAB_payload
Thanks
-- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot