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X-CSE-ConnectionGUID: 8G30G+8VSUq01nNeiW8PFA== X-CSE-MsgGUID: 7I2Nr7qUSC2E1yQhlFA2Jg== X-IronPort-AV: E=McAfee;i="6700,10204,11205"; a="13869858" X-IronPort-AV: E=Sophos;i="6.10,255,1719903600"; d="scan'208";a="13869858" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Sep 2024 15:34:29 -0700 X-CSE-ConnectionGUID: GkQYwE2zSGCUR6+Gzmr6og== X-CSE-MsgGUID: Z1pQXdaFSEOeXmt/13Fl/A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,255,1719903600"; d="scan'208";a="71855392" Received: from uaeoff-desk2.amr.corp.intel.com (HELO [10.124.221.107]) ([10.124.221.107]) by fmviesa010-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Sep 2024 15:34:29 -0700 Message-ID: Date: Tue, 24 Sep 2024 15:34:28 -0700 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/6] x86/bugs: Remove MDS command line To: Daniel Sneddon , Jonathan Corbet , Thomas Gleixner , Borislav Petkov , Peter Zijlstra , Josh Poimboeuf , Ingo Molnar , Dave Hansen , x86@kernel.org Cc: hpa@zytor.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, pawan.kumar.gupta@linux.intel.com References: <20240924223140.1054918-1-daniel.sneddon@linux.intel.com> <20240924223140.1054918-3-daniel.sneddon@linux.intel.com> Content-Language: en-US From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/24/24 15:31, Daniel Sneddon wrote: > - mds= [X86,INTEL,EARLY] > - Control mitigation for the Micro-architectural Data > - Sampling (MDS) vulnerability. As much as I'd love to remove old code, won't this surprise users if we just take this away? I suspect the _least_ we can do is warn folks if they use something that we recently ripped out. But the right thing is probably to keep the old one around for at least a while.