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Message-ID: <CAMFK0guEASKq1zS3S3u=e7TAAYTvmfWfWe5k+X+hKV6RTpyw_Q@mail.gmail.com>
Date: Thu, 11 Jan 2018 12:29:41 +0100
From: Olivier Galibert <galibert@...ox.com>
To: Pavel Machek <pavel@....cz>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
jikos@...e.cz
Subject: Re: Linux 4.15-rc7
Wasn't/Isn't the 4G/4G memory layout for 32 bits essentially KPTI?
OG.
On Thu, Jan 11, 2018 at 12:32 AM, Pavel Machek <pavel@....cz> wrote:
> Hi!
>
>> The one thing I want to do now that Meltdown and Spectre are public,
>> is to give a *big* shout-out to the x86 people, and Thomas Gleixner in
>> particular for really being on top of this. It's been one huge
>> annoyance, and honestly, Thomas really went over and beyond in this
>> whole mess. A lot of other people have obviously been involved too,
>
> As I understand it: KPTI prevents Meltdown attack on x86-64, but
> Spectre means even x86-64 is not expected to be safe?
>
> Ok, so Meltdown is public... And I still have some nice 32-bit
> machines I'd like to keep working.
>
> Proof of concept is out, https://github.com/IAIK/meltdown/ .
>
> Is anyone working on KPTI for x86-32? SLES11 should still be
> supported, and that should have x86-32 version; any chance SUSE can
> share some patches?
>
> Thanks,
> Pavel
> --
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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