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 “ignores” > 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
