linux-base

Any layer may contribute kernel command line arguments as fragments in its cmdline.d drop-in directory for this layer, ie static fragments in <layer-stem>.d/for/linux-base/cmdline.d/ and dynamic fragments written at build time to $LAYER_WORKDIR/for/linux-base/cmdline.d/, no later than preimage. See Drop-ins for Other Layers in the layer documentation for version-specific directories, precedence and ordering.

A fragment is a single line of whitespace separated arguments. -glob removes matching arguments contributed earlier (eg -fsck* removes fsck.repair=yes). +arg or arg appends an argument. The result is written to /etc/kernel/cmdline.