linux-kernel - Re: Avoid speculative indirect calls in kernel

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Date:   Sun, 7 Jan 2018 18:16:26 +0000
From:   "Woodhouse, David" <dwmw@...zon.co.uk>
To:     Ivan Ivanov <qmastery16@...il.com>, <kah.listaddress@...il.com>,
        "Dave Hansen" <dave.hansen@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Jon Masters" <jcm@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Alan Cox <gnomes@...rguk.ukuu.org.uk>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andi Kleen <andi@...stfloor.org>,
        Greg Kroah-Hartman <gregkh@...ux-foundation.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
        Jeff Law <law@...hat.com>, Nick Clifton <nickc@...hat.com>,
        <bp@...en8.de>
Subject: Re: Avoid speculative indirect calls in kernel

On Sun, 2018-01-07 at 21:01 +0300, Ivan Ivanov wrote:
> Make sure that your patches do not affect AMD CPU,
> because they are unaffected by Meltdown vulnerability
> for which this "30% slowdown Intel patch" is required

These patches *do* affect AMD CPUs, because they address one of the
issues for which AMD CPUs are also vulnerable.


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