linux-kernel - Re: [PATCH 1/1] x86/pti: Fix kernel warnings for pti= and nopti cmdline options.

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Date:   Fri, 11 Aug 2023 17:15:37 -0700
From:   Sohil Mehta <sohil.mehta@...el.com>
To:     Dave Hansen <dave.hansen@...el.com>,
        Jo Van Bulck <jo.vanbulck@...kuleuven.be>,
        <linux-kernel@...r.kernel.org>, <dave.hansen@...ux.intel.com>,
        <luto@...nel.org>, <peterz@...radead.org>, <mingo@...hat.com>
CC:     <x86@...nel.org>, <bp@...en8.de>, <tglx@...utronix.de>,
        <hpa@...or.com>
Subject: Re: [PATCH 1/1] x86/pti: Fix kernel warnings for pti= and nopti
 cmdline options.

On 8/11/2023 5:08 PM, Dave Hansen wrote:
> It's worth *ZERO* hassle.  The docs say:
> 
>>         mitigations=
> ...
>>                         off
>>                                 Disable all optional CPU mitigations.  This
>>                                 improves system performance, but it may also
>>                                 expose users to several CPU vulnerabilities.
>>                                 Equivalent to: 
> ...
>>                                                nopti [X86,PPC]
> 
> That's 100% unambiguous.
> 

Ah! I missed that. Sorry about the trouble.