One of the unique benefits of the Coreboot open-source BIOS/firmware project is that it can support loading the Linux kernel directly after initializing the motherboard -- instead of using GRUB2/SeaBIOS, the Linux kernel can be included on the ROM chip. This isn't a new feature to Coreboot, but with a Git commit made today it's now easier to configure.
Support was added to Coreboot on Saturday that provides Kconfig options for Linux as a payload. Coreboot uses Kconfig (commonly known as the configuration system for the Linux kernel) as its method of configuring the open-source firmware's different options and support targets. The new Kconfig options that were added allow for users/developers to define the Linux kernel image, initrd, and any command-line parameters to be passed to the kernel.
The commit adding these kernel options to the Coreboot Kconfig system can be found via Gitweb
. For those wanting to learn more about Coreboot's different payload options, see this Wiki page