Libero SoC v2021.2 includes an update to the RTG4 Input pad timing model to improve an over-conservative timing margin. Prior to Libero SoC v2021.2, false violations may occur making timing closure more difficult. With this update, such false violations will be removed. Minor performance improvement may also be seen. No action is required for completed designs that have met timing across all corners. Ongoing or new designs are recommended to upgrade to Libero SoC v2021.2.