linux-hardening - Re: [RFC PATCH v2 18/19] x86/mm: Add PKS table soft mode

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Date:   Mon, 30 Aug 2021 20:49:56 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Rick Edgecombe <rick.p.edgecombe@...el.com>, dave.hansen@...el.com,
        luto@...nel.org, peterz@...radead.org, x86@...nel.org,
        akpm@...ux-foundation.org, keescook@...omium.org,
        shakeelb@...gle.com, vbabka@...e.cz, rppt@...nel.org
Cc:     linux-mm@...ck.org, linux-hardening@...r.kernel.org,
        kernel-hardening@...ts.openwall.com, ira.weiny@...el.com,
        dan.j.williams@...el.com, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v2 18/19] x86/mm: Add PKS table soft mode

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

> +
>   	pty.legacy_count=
>   			[KNL] Number of legacy pty's. Overwrites compiled-in
>   			default number.


-- 
~Randy