Re: [RFC] spectre hardware-software cooperative mitigation

From: Alan Cox
Date: Fri Jan 18 2019 - 10:31:36 EST

> This is going to be a mammoth task. The alternatives are to continue
> as things are, which is a mess that cannot be cleaned up by either of
> (mutually exclusive) hardware or software alone.
> Thoughts and feedback appreciated.

You need to be talking to the JIT developers not asking here I think.
Speculative attacks in JIT environments is a topic an order of magnitude
or more complex than the kernel cases because there isn't even process
isolation between the JIT, JIT engin eand support logic.