Worked on the Dasharo/edk2 repository to deliver a targeted stability fix addressing TPM2 physical presence interactions within embedded systems firmware. Focused on the OvmfPkg level, the work involved updating the DxeTcg2PhysicalPresenceLib to ensure CPU caches flush correctly during TPM2 physical presence PPI engagement, which resolved persistent boot loops and improved PCR bank handling. This C-based system programming effort enhanced boot reliability and maintained TPM request integrity, directly strengthening the security posture of TPM-enabled deployments. The solution reduced field support cases by preventing TPM state inconsistencies, demonstrating a methodical approach to firmware development and low-level hardware interaction.