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From what I can see, the retpoline works on pre Skylake processors. I am guessing that Google might not be using Skylake+ processors and so their comments are n
by gavindean90 9y ago
From what I can see, the retpoline works on pre Skylake processors. I am guessing that Google might not be using Skylake+ processors and so their comments are not wrong for their equipment.
- cthalupa 9y agoNo, it's pretty specifically not about the Skylake issue - The retpoline not working on Skylake is fixed by IBRS, and is due to ret calls falling back to indirect prediction in deep stacks. vmexits and context switches are a very different thing than the deep stack ret calls.