3 ms·
My understanding was that the Spectre microcode patches give software a way to block speculative execution (via an MSR register) and to make the lfence instruct
by lower 9y ago
My understanding was that the Spectre microcode patches give software a way to block speculative execution (via an MSR register) and to make the lfence instruction also block speculative execution. So, software support will also be needed to make use of these features in defending against Spectre.
What's being measured here must be mainly the impact of the Meltdown fixes.
- KirinDave 9y agoAll they're measuring is the output of their "fixes". Intel has said at least twice that they consider their scope to be how to provide ways to mitigate spectre attacks.
- lower 9y agoWell, they're comparing kernel 3.10.0-693.11.6.el7.x86_64, which has the meltdown fixes, against 3.10.0-693.el7.x86_64, which does not.