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Date: Tue, 31 Aug 2021 17:55:17 +0000
From: "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
To: "peterz@...radead.org" <peterz@...radead.org>, "keescook@...omium.org"
<keescook@...omium.org>, "rdunlap@...radead.org" <rdunlap@...radead.org>,
"rppt@...nel.org" <rppt@...nel.org>, "vbabka@...e.cz" <vbabka@...e.cz>,
"x86@...nel.org" <x86@...nel.org>, "akpm@...ux-foundation.org"
<akpm@...ux-foundation.org>, "Lutomirski, Andy" <luto@...nel.org>, "Hansen,
Dave" <dave.hansen@...el.com>, "shakeelb@...gle.com" <shakeelb@...gle.com>
CC: "Williams, Dan J" <dan.j.williams@...el.com>,
"linux-hardening@...r.kernel.org" <linux-hardening@...r.kernel.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org"
<linux-kernel@...r.kernel.org>, "kernel-hardening@...ts.openwall.com"
<kernel-hardening@...ts.openwall.com>, "Weiny, Ira" <ira.weiny@...el.com>
Subject: Re: [RFC PATCH v2 18/19] x86/mm: Add PKS table soft mode
On Mon, 2021-08-30 at 20:49 -0700, Randy Dunlap wrote:
> On 8/30/21 4:59 PM, Rick Edgecombe wrote:
> > diff --git a/Documentation/admin-guide/kernel-parameters.txt
> > b/Documentation/admin-guide/kernel-parameters.txt
> > index 7902fce7f1da..8bb290fee77f 100644
> > --- a/Documentation/admin-guide/kernel-parameters.txt
> > +++ b/Documentation/admin-guide/kernel-parameters.txt
> > @@ -4254,6 +4254,10 @@
> > nopti [X86-64]
> > Equivalent to pti=off
> >
> > + nopkstables [X86-64] Disable PKS page table protection
> > +
> > + pkstablessoft [X86-64] Warn instead of oops on pks tables
> > violations
>
> preferably PKS
>
Sure, thanks.
> > +
> > pty.legacy_count=
> > [KNL] Number of legacy pty's. Overwrites
> > compiled-in
> > default number.
>
>
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