KSP offers a way to pass options to processors, its done with the -P flag, for example:

-P plugin:com.google.devtools.ksp.symbol-processing:apoption=key=value

Since we don't have a dedicated attr for that and the existing kotlinc opts are not supporting -P it's impossible to pass those options to the KSP plugin.

We probably would want to allow declaring the options on both target and processor level.