Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965602AbeAJPVU (ORCPT + 1 other); Wed, 10 Jan 2018 10:21:20 -0500 Received: from smtp-fw-4101.amazon.com ([72.21.198.25]:35421 "EHLO smtp-fw-4101.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965006AbeAJPVT (ORCPT ); Wed, 10 Jan 2018 10:21:19 -0500 X-Amazon-filename: smime.p7s X-IronPort-AV: E=Sophos;i="5.46,340,1511827200"; d="p7s'?scan'208";a="702701366" Message-ID: <1515597637.22302.185.camel@amazon.co.uk> Subject: Re: [PATCH v3 3/3] x86/retpoline: Convert generic specific retpolines to use RETPOLINE_GENERIC To: Tom Lendacky , "tglx@linutronix.de" , "andi@firstfloor.org" CC: "linux-kernel@vger.kernel.org" , "peterz@infradead.org" , "tim.c.chen@linux.intel.com" , "torvalds@linux-foundation.org" , "ak@linux.intel.com" , "x86@kernel.org" , "luto@kernel.org" , "pjt@google.com" , "dave.hansen@intel.com" , "jikos@kernel.org" , "gregkh@linux-foundation.org" In-Reply-To: <1e4e8acb-7f21-aa13-5c0c-5dccb2c4c8e4@amd.com> References: <20180110022831.29826-1-andi@firstfloor.org> <20180110022831.29826-4-andi@firstfloor.org> <1515590133.22302.148.camel@amazon.co.uk> <1515595594.22302.170.camel@amazon.co.uk> <1e4e8acb-7f21-aa13-5c0c-5dccb2c4c8e4@amd.com> Face: 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 Organization: Amazon Content-Type: multipart/signed; micalg=sha-256; protocol="application/x-pkcs7-signature"; boundary="=-sV6tposggBfCQzvWdf/6" Date: Wed, 10 Jan 2018 15:20:37 +0000 X-Mailer: Evolution 3.18.5.2-0ubuntu3.2 MIME-Version: 1.0 From: "Woodhouse, David" X-Evolution-Source: 1481217574.17989.4@uc8d3ff76b9bc5848a9cc Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: --=-sV6tposggBfCQzvWdf/6 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2018-01-10 at 09:18 -0600, Tom Lendacky wrote: >=20 > Ok, hence my caveat on the underflow in the reply.=C2=A0 If it's to elimi= nate > userspace addresses, then yes, it needs to be applied for AMD as well. >=20 > In that case maybe the comments in arch/x86/entry/entry_{32,64}.S need to > be updated since they only talk about underflow. I think we're dropping that patch anyway. qv=C2=B9. 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