linux-kernel - Re: [PATCH v5 1/1] x86/cpufeatures: Implement Predictive Store Forwarding control.

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Date:   Mon, 10 May 2021 15:34:01 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     "Saripalli, RK" <rsaripal@....com>, linux-kernel@...r.kernel.org,
        x86@...nel.org, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        Jonathan Corbet <corbet@....net>, bsd@...hat.com,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Andrea Arcangeli <aarcange@...hat.com>
Subject: Re: [PATCH v5 1/1] x86/cpufeatures: Implement Predictive Store
 Forwarding control.

On Tue, May 11, 2021 at 12:15:32AM +0200, Thomas Gleixner wrote:
> On Mon, May 10 2021 at 15:09, Kees Cook wrote:
> > On Mon, May 10, 2021 at 11:44:03PM +0200, Thomas Gleixner wrote:
> >> Kees, any opinions?
> >
> > I agree: if PSF is a subset of SSBD, there's no need for the additional
> > machinery.
> >
> > On a related topic, what happened to Andi's patch to switch the seccomp
> > defaults? I can't find it now...
> 
> You mean this one:
> 
>   https://lore.kernel.org/r/20200312231222.81861-1-andi@firstfloor.org
> 
> If so, then it has lacks a follow up.

Ah-ha, found it. I misremembered the author. :)
https://lore.kernel.org/lkml/20201104235054.5678-1-aarcange@redhat.com/

Specifically these two patches:
https://lore.kernel.org/lkml/20201104235054.5678-1-aarcange@redhat.com/
https://lore.kernel.org/lkml/20201105001406.13005-2-aarcange@redhat.com/


And, Thomas, while I have your attention, I'd really like this to go in
for -rc2, if you can snag it:
https://lore.kernel.org/lkml/20210419231741.4084415-1-keescook@chromium.org/

:)

Thanks!

-- 
Kees Cook