linux-kernel - Re: [GIT PULL] x86/urgent for v5.11-rc7

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Message-ID: <20210207175814.GF32127@zn.tnic>
Date:   Sun, 7 Feb 2021 18:58:14 +0100
From:   Borislav Petkov <bp@...e.de>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Dave Hansen <dave.hansen@...el.com>
Cc:     Steven Rostedt <rostedt@...dmis.org>, x86-ml <x86@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] x86/urgent for v5.11-rc7

On Sun, Feb 07, 2021 at 09:49:18AM -0800, Linus Torvalds wrote:
> On Sun, Feb 7, 2021 at 2:40 AM Borislav Petkov <bp@...e.de> wrote:
> >
> > - Disable CET instrumentation in the kernel so that gcc doesn't add
> > ENDBR64 to kernel code and thus confuse tracing.
> 
> So this is clearly the right thing to do for now, but I wonder if
> people have a plan for actually enabling CET and endbr at cpl0 at some
> point?

It probably is an item on some Intel manager's to-enable list. So far,
the CET enablement concentrates only on userspace but dhansen might know
more about future plans. CCed.

-- 
Regards/Gruss,
    Boris.

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