According to EA
Requiring Secure Boot provides us with features that we can leverage against cheats that attempt to infiltrate during the Windows boot process. It also lets the Battlefield Positive Play team use its own features and related dependent security features like TPM to combat other forms of cheating, the most relevant of which include:
- Kernel-Level Cheats and Rootkits
- Memory Manipulation and Injection
- Spoofing and Hardware ID Manipulation
- Virtual Machines and Emulation
- Tampering with Anti-Cheat Systems
It feels very anti-linux, and I don’t like it, but with a good number of hours in BF6 so far, I have yet to run into an obvious cheater so maybe it works.