AllowPeerUser= + AllowPeerGroup= to allow trivially simple access control
when invoked via socket as IPC services
+* systemd-tpm2-setup should probably have a factory reset logic, i.e. when some
+ kernel command line option is set we reset the TPM (equivalent of tpm2_clear
+ -c owner?).
+
+* systemd-tpm2-setup should support a mode where we refuse booting if the SRK
+ changed. (Must be opt-in, to not break systems which are supposed to be
+ migratable between PCs)
+
* when systemd-sysext learns mutable /usr/ (and systemd-confext mutable /etc/)
then allow them to store the result in a .v/ versioned subdir, for some basic
snapshot logic