linux-kernel - Re: [RFC] spectre hardware-software cooperative mitigation

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Message-ID: <20190118150706.7b1b9e31@alans-desktop>
Date:   Fri, 18 Jan 2019 15:07:06 +0000
From:   Alan Cox <gnomes@...rguk.ukuu.org.uk>
To:     Luke Kenneth Casson Leighton <lkcl@...l.net>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] spectre hardware-software cooperative mitigation

> 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.

Alan