Messages in this thread | | | From | David Laight <> | Subject | RE: [RFC PATCH 00/16] PTI support for x86-32 | Date | Mon, 22 Jan 2018 09:55:31 +0000 |
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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
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