Kernel command-line parameters with UKI

With Unified Kernel Image (UKI), systemd-boot, specifically systemd-stub, handles the kernel command-line parameters. The UKI delivered by Red Hat includes the basic kernel command-line parameter console=tty0 console=ttyS0.

You can add additional kernel command-line parameters by using UKI add-ons. Alternatively, you can generate your own UKI to contain any arguments you require.

Important

Secure Boot revokes improperly signed UKIs and add-ons. These signatures can also alter Platform Configuration Register (PCR) measurements in the Trusted Platform Module (TPM), which can potentially affect boot sequence.