[Joel_Mckay]

Mitigates undetectable bleeding/contamination of information between parallel processes, cores, and or rowhammer etc.

Thus, writing a robust and secure OS may actually be possible by competent programmers in most compiled languages. Best of luck =3

[Rohansi]

But how does it accomplish that? And how can you guarantee it would solve those hardware issues?

[Joel_Mckay]

The memory areas would appear as ciphertext to other processes/unprivileged-cores in most cases even when hardware has glitched up. If you are asking how they specifically implemented the mmu <-> unreachable key handling outside the OS, that information was never public if I recall.

I've often pondered how it was really implemented too. Best of luck. =3

"Why Multi-Threaded Code Can Sometimes Misbehave (Weak Memory Concurrency)" (Computerphile)

https://www.youtube.com/watch?v=E3hvLz717zM