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Date: Tue, 5 Dec 2017 10:34:08 +0100 (CET)
From: Thomas Gleixner <tglx@linutronix.de>
To: Andy Lutomirski <luto@kernel.org>
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Subject: Re: [patch 57/60] x86/mm/kpti: Add Kconfig
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References: <20171204140706.296109558@linutronix.de> <20171204150609.511885345@linutronix.de> <CALCETrVfasJMa_++EB-bFm_MzHAzKqvjRPsaBo2m8YTzRomkxg@mail.gmail.com> <alpine.DEB.2.20.1712041757110.1788@nanos>
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On Mon, 4 Dec 2017, Thomas Gleixner wrote:
> On Mon, 4 Dec 2017, Andy Lutomirski wrote:
> > On Mon, Dec 4, 2017 at 6:08 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
> > > --- a/security/Kconfig
> > > +++ b/security/Kconfig
> > > @@ -54,6 +54,16 @@ config SECURITY_NETWORK
> > >           implement socket and networking access controls.
> > >           If you are unsure how to answer this question, answer N.
> > >
> > > +config KERNEL_PAGE_TABLE_ISOLATION
> > > +       bool "Remove the kernel mapping in user mode"
> > > +       depends on X86_64 && JUMP_LABEL
> > 
> > select JUMP_LABEL perhaps?
> 
> Silly me. Yes.

Peter just pointed out that we switched everything to cpu_has() which is
using alternatives so jump label is not longer required at all.

Thanks,

	tglx