RE: [RFC PATCH 00/16] PTI support for x86-32

[David Laight]

From: Nadav Amit
> Sent: 21 January 2018 23:46
> 
> I wanted to see whether segments protection can be a replacement for PTI
> (yes, excluding SMEP emulation), or whether speculative execution âignoresâ
> limit checks, similarly to the way paging protection is skipped.

That's made me remember something about segment limits applying in 64bit mode.
I really can't remember the details at all.
I'm sure it had something to do with one of the VM implementations restricting
memory accesses.

	David