Marc Balmer <marc%msys.ch@localhost> writes: > No, once the securelevel is raised all games are final, the GPIO > configuration can not be changed anymore. That is on purpose. > > Whether that rule should be relaxed can be the topic of a discussion. I > could imagine a setting where in runlevel 0 you could specify that > certain pins remain changeable, even after the secure level had been raised. What's the rationale for GPIO direction being a security issue, vs viewing that as input/output ports? I can see that hooking up some things to gpio might want to be fixed, but that seems like an exceptional case, not the norm. So perhaps controllable should be default, with a lockdown ioctl for people who have a security reason to tie this to securelevel. Or perhaps I'm missing some obvious use case that's normal.
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