Sure valve can make Gamedroid a reality, but Valve seems to be on the side of not using KLA themselves.

And, again, Gamedroid != Linux and PS5's OS is not anything like normal BSD. In both cases (hypothetical Gamderoid and current Console OSes and Windows) the game companies are granted a controlled runtime environment. Linux will not support any effective KLA without a third party providing a blessed (all drivers must be signed, secure boot, etc) distro.

The reasons are:

* PITA to support different distros (although not infeasible). * Trivial for anyone to just write their own kernel module which your KLA is blind to. * Trivial to modify how your KLA driver hooks Linux to make it blind to the cheats.