linux-kernel - Re: [PATCH 1/6] x86/bugs: Create single parameter for VERW based mitigations

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Message-ID: <0db4dd0a-61c7-4e04-ae8f-38d7e720ebe6@linux.intel.com>
Date: Wed, 9 Oct 2024 13:34:52 -0700
From: Daniel Sneddon <daniel.sneddon@...ux.intel.com>
To: "Kaplan, David" <David.Kaplan@....com>, Jonathan Corbet <corbet@....net>,
 Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...en8.de>,
 Peter Zijlstra <peterz@...radead.org>, Josh Poimboeuf <jpoimboe@...nel.org>,
 Ingo Molnar <mingo@...hat.com>, Dave Hansen <dave.hansen@...ux.intel.com>,
 "x86@...nel.org" <x86@...nel.org>
Cc: "hpa@...or.com" <hpa@...or.com>,
 "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "pawan.kumar.gupta@...ux.intel.com" <pawan.kumar.gupta@...ux.intel.com>
Subject: Re: [PATCH 1/6] x86/bugs: Create single parameter for VERW based
 mitigations

On 10/9/24 13:02, Kaplan, David wrote:
> [AMD Official Use Only - AMD Internal Distribution Only]
> 
>> -----Original Message-----
>> From: Daniel Sneddon <daniel.sneddon@...ux.intel.com>
>> Sent: Wednesday, October 9, 2024 2:44 PM
>> To: Kaplan, David <David.Kaplan@....com>; Jonathan Corbet
>> <corbet@....net>; Thomas Gleixner <tglx@...utronix.de>; Borislav Petkov
>> <bp@...en8.de>; Peter Zijlstra <peterz@...radead.org>; Josh Poimboeuf
>> <jpoimboe@...nel.org>; Ingo Molnar <mingo@...hat.com>; Dave Hansen
>> <dave.hansen@...ux.intel.com>; x86@...nel.org
>> Cc: hpa@...or.com; linux-doc@...r.kernel.org; linux-
>> kernel@...r.kernel.org; pawan.kumar.gupta@...ux.intel.com
>> Subject: Re: [PATCH 1/6] x86/bugs: Create single parameter for VERW based
>> mitigations
>>
>> Caution: This message originated from an External Source. Use proper
>> caution when opening attachments, clicking links, or responding.
>>
>>
>> On 10/9/24 09:39, Daniel Sneddon wrote:
>>>
>>>>>
>>>>> Are you suggesting a name change away from "clear_cpu_buffers" since
>>>>> it is clearly about the mitigation rather than the bug? I'm not sure
>>>>> there is a good common name for those 4 bugs that isn't about the
>>>>> mitigation, but I'm open to any suggestions.
>>>>>
>>>>
>>>> Yes, I think that would be better.  I wasn't sure on a name either.  In the
>> RFDS webpage I see it described as "similar to data sampling transient
>> execution attacks".  Perhaps something like that could be an umbrella term?
>>>>
>>
>> data sampling feels a little too generic. How about something like
>> microarch_data_sampling?
> 
> That's what MDS stands for right?  Might be too associated with that one issue.

Oops. Right. I'm so used to the acronym I can't even remember what it actually
stands for! :)

> 
> Maybe transient_data_sampling?
> 
That'll work! Thanks!
> --David Kaplan