OMG. Does Intel have broken speculative execution? "AMD ... does not allow memory references, including speculative references, that access higher privileged data when running in a lesser privileged mode when that access would result in a page fault." https://lkml.org/lkml/2017/12/27/2 …
Replying to @scarybeasts
Perhaps speculative execution can prefetch data from explict cache control instructions and leave a window of time where the CPU can snarf it and sequester it elsewhere before the page fault is triggered.
3:54 PM - 1 Jan 2018
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