linux-kernel - Re: [RFC PATCH 00/16] PTI support for x86-32

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Date:   Wed, 17 Jan 2018 10:55:07 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Ingo Molnar <mingo@...nel.org>, "H . Peter Anvin" <hpa@...or.com>,
        x86@...nel.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Juergen Gross <jgross@...e.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...en8.de>, Jiri Kosina <jkosina@...e.cz>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Brian Gerst <brgerst@...il.com>,
        David Laight <David.Laight@...lab.com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        Eduardo Valentin <eduval@...zon.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Will Deacon <will.deacon@....com>, aliguori@...zon.com,
        daniel.gruss@...k.tugraz.at, hughd@...gle.com, keescook@...gle.com,
        Andrea Arcangeli <aarcange@...hat.com>,
        Waiman Long <llong@...hat.com>, jroedel@...e.de
Subject: Re: [RFC PATCH 00/16] PTI support for x86-32

Hi Thomas,

thanks for your review, I'll work in your suggestions for the next post.

On Tue, Jan 16, 2018 at 10:20:40PM +0100, Thomas Gleixner wrote:
> On Tue, 16 Jan 2018, Joerg Roedel wrote:

> >  16 files changed, 333 insertions(+), 123 deletions(-)
> 
> Impressively small and well done !

Thanks :)

> Can you please make that patch set against
> 
>    git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-pti-for-linus
> 
> so we immediately have it backportable for 4.14 stable? It's only a trivial
> conflict in pgtable.h, but we'd like to make the life of stable as simple
> as possible. They have enough headache with the pre 4.14 trees.

Sure, will do.

> We can pick some of the simple patches which make defines and inlines
> available out of the pile right away and apply them to x86/pti to shrink
> the amount of stuff you have to worry about.

This should be patches 4, 5, 7, 11, and I think 13 is also simple
enough. Feel free to take them, but I can also carry them forward if
needed.

Thanks,

	Joerg