From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linutronix.de (146.0.238.70:993) by crypto-ml.lab.linutronix.de with IMAP4-SSL for ; 02 Mar 2019 19:22:34 -0000 Received: from mga17.intel.com ([192.55.52.151]) by Galois.linutronix.de with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1h0ADQ-0003Wf-Ug for speck@linutronix.de; Sat, 02 Mar 2019 20:22:33 +0100 Subject: [MODERATED] Re: [SPAM] Re: [patch V5 09/14] MDS basics 9 References: <20190227150939.605235753@linutronix.de> <20190227152037.818666801@linutronix.de> <20190301140415.pjv7qjellvqrlbw5@treble> <20190301164022.uxpvtuzwlfdylqri@treble> <20190301183914.y3kvjyneyncgwki7@treble> <20190301223859.GT14294@redhat.com> From: Dave Hansen Message-ID: Date: Sat, 2 Mar 2019 11:22:29 -0800 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/mixed; boundary="Nm4wRHl5yi5UKWBbqfoSGxMAUu6nUd3Xs"; protected-headers="v1" To: speck@linutronix.de List-ID: This is an OpenPGP/MIME encrypted message (RFC 4880 and 3156) --Nm4wRHl5yi5UKWBbqfoSGxMAUu6nUd3Xs Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 3/1/19 2:58 PM, speck for Thomas Gleixner wrote: > So the thing is that newer steppings are fixed vs. all of the issues. I= > surely hope that these have MDS_NO set in MSR_IA32_ARCH_CAPABILITIES. >=20 > If that's not the case, then we'll end up with stepping specific quirks= > which would be an utter mess. >=20 > Can anyone @Intel please answer this question? MDS_NO will be set on all unaffected processor steppings. We should not have to do any stepping-specific tweaks in the kernel. --Nm4wRHl5yi5UKWBbqfoSGxMAUu6nUd3Xs--