lkml.org 
[lkml]   [2018]   [Jan]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: Linux 4.15-rc7
    Hi!

    > Wasn't/Isn't the 4G/4G memory layout for 32 bits essentially KPTI?

    Good point. Is that still supported? Was it ever?

    Umm. I seem to recall that 4G/4G layout was out of tree but never
    merged.

    High Memory Support
    1. off (NOHIGHMEM)
    2. 4GB (HIGHMEM4G)
    > 3. 64GB (HIGHMEM64G)
    choice[1-3]: 3
    Memory split
    > 1. 3G/1G user/kernel split (VMSPLIT_3G) (NEW)
    2. 2G/2G user/kernel split (VMSPLIT_2G)
    3. 1G/3G user/kernel split (VMSPLIT_1G)
    choice[1-3?]:

    Does anyone have recent patches?

    Best regards,
    Pavel

    > On Thu, Jan 11, 2018 at 12:32 AM, Pavel Machek <pavel@ucw.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

    --
    (english) http://www.livejournal.com/~pavelmachek
    (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
    [unhandled content-type:application/pgp-signature]
    \
     
     \ /
      Last update: 2018-01-14 23:25    [W:2.650 / U:0.120 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site