YSK: If you use a TPM, new changes in SystemD and mkinicpio will cause most registers to change, be prepared

Target audience: If you rely on TPM registers 0-7,9,12-14 and expect a specific value from them, for example, LUKS unlock. Why it matters: Under normal circumstances, a TPM PCR-0 can go an entire lifetime without ever changing. It measures the built-in UEFI, and only a firmware update can potentially change it. Something like PCR-7 can only change...