linux-kernel - Re: Linux 4.15-rc7

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Message-ID: <9d4136d3-48b1-4187-c657-f5d7c8e80bb0@gmail.com>
Date:   Thu, 11 Jan 2018 16:06:11 +0200
From:   Nikolay Borisov <n.borisov.lkml@...il.com>
To:     Olivier Galibert <galibert@...ox.com>, 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



On 11.01.2018 13:29, Olivier Galibert wrote:
> Wasn't/Isn't the 4G/4G  memory layout for 32 bits essentially KPTI?

4g/4g was never accepted upstream

> 
>   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