From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.7 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 9AE597D90D for ; Wed, 28 Aug 2019 13:37:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726341AbfH1NhR (ORCPT ); Wed, 28 Aug 2019 09:37:17 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:40944 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726197AbfH1NhR (ORCPT ); Wed, 28 Aug 2019 09:37:17 -0400 Received: by atrey.karlin.mff.cuni.cz (Postfix, from userid 512) id C98C982573; Wed, 28 Aug 2019 15:37:00 +0200 (CEST) Date: Wed, 28 Aug 2019 15:37:13 +0200 From: Pavel Machek To: Borislav Petkov Cc: Pavel Machek , Thomas Gleixner , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Tom Lendacky , Andrew Cooper , Andrew Morton , Chen Yu , "H. Peter Anvin" , Ingo Molnar , Jonathan Corbet , Josh Poimboeuf , Juergen Gross , Kees Cook , "linux-doc@vger.kernel.org" , "linux-pm@vger.kernel.org" , Nathan Chancellor , Paolo Bonzini , "Rafael J. Wysocki" , "x86@kernel.org" Subject: Re: [PATCH 4.19 72/98] x86/CPU/AMD: Clear RDRAND CPUID bit on AMD family 15h/16h Message-ID: <20190828133713.GF8052@amd> References: <20190827113604.GB18218@amd> <20190828103113.GA14677@amd> <20190828114947.GC8052@amd> <20190828120024.GF4920@zn.tnic> <20190828120935.GD8052@amd> <20190828121628.GG4920@zn.tnic> <20190828122913.GE8052@amd> <20190828124621.GI4920@zn.tnic> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="KJY2Ze80yH5MUxol" Content-Disposition: inline In-Reply-To: <20190828124621.GI4920@zn.tnic> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org --KJY2Ze80yH5MUxol Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed 2019-08-28 14:46:21, Borislav Petkov wrote: > On Wed, Aug 28, 2019 at 02:29:13PM +0200, Pavel Machek wrote: > > This is not a way to have an inteligent conversation. >=20 > No, this *is* the way to keep the conversation sane, without veering > off into some absurd claims. >=20 > So, to cut to the chase: you can simply add "rdrand=3Dforce" to your > cmdline parameters and get back to using RDRAND. >=20 > And yet if you still feel this fix does not meet your expectations, > you were told already to either produce patches or who to contact. I'm > afraid complaining on this thread won't get you anywhere but that's your > call. No, this does not meet my expectations, it violates stable kernel rules, and will cause regression to some users, while better solution is known to be available. Best regards, Pavel --=20 DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany --KJY2Ze80yH5MUxol Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAl1mg4kACgkQMOfwapXb+vJ5lQCfe67ZQO1KqO+Emi7h3sVMu+RT SAEAn1oFIuqthMNyVQDSzzirRUHxxId7 =FeXY -----END PGP SIGNATURE----- --KJY2Ze80yH5MUxol--