Packages with the initramfs use flag

sys-firmware / intel-microcode : Intel IA32/IA64 microcode update data

  • install a small initramfs for use with CONFIG_MICROCODE_EARLY

sys-kernel / gentoo-kernel : Linux kernel built with Gentoo patches

  • Build initramfs along with the kernel.

sys-kernel / gentoo-kernel-bin : Pre-built Linux kernel with genpatches

  • Build initramfs along with the kernel.

sys-kernel / linux-firmware : Linux firmware files

  • Create and install initramfs for early microcode loading in /boot (only AMD for now)

sys-kernel / vanilla-kernel : Linux kernel built from vanilla upstream sources

  • Build initramfs along with the kernel.