From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-309776-1518537381-2-5622042844169422341 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='com', MailFrom='org' X-Spam-charsets: plain='us-ascii' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1518537380; b=T5tBalNmCxQVGIotfts+RGaGBSy8CPCJju9BO0sJ+MhPzSR RJ1TegDfc6W9qXAOEhZu0IkLdpuUXMN7Hc5V5ORU/yyNzYW0wtZM2v3WbgPTQJpr gAudoPySHUZ8xKKMd4iN4TPnrbVw76jZnEaVHr+03NU1+d7Isw62ncPWP5rji27Q JD5Z1ixuIJWcW36uLIPMxzzJpRmVxxKnOuen5sdNKiBZEf7hb2VuD0C/Lv8XjEhB wd16eangbdFAF35Rv39JYYO9EbpAbVc4niWzUgvk6VrXZ28TRcEWkr4R2gbDIdUf +L60DK0uzHM5Caphee+KMq+xgT8MkBTPEzEpuhA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=date:from:to:cc:subject:message-id :references:mime-version:content-type:in-reply-to:sender :list-id; s=arctest; t=1518537380; bh=TuwBfnGcQ4RTcAVd5VOLnwiI5Q kQj7l/SQ/1tx/onQA=; b=Q+5SatKy3yPWQX9YFgAzuGEJOltq2e1o5cED7GdhlC YLcP0rMejs2dqwodC+isW7Z0gVdoaCUd4j03RuE6e7AmD6Se2aFXXSYLT07r/C9b 3YiD2PBOuK9ttsSinOxM5MN9vmkRDs0YASyg1iUWEQYu8lGR6kq5rbFl1OyjbCmu gb7e7iFwZX6+KkCt1Yr4lJCUMgz6BpzvnGSj1aNhp/YEwqnAscRC1ipoMQHDINP1 fWcA5e+g6z+H1Iq/HMR/VxLaukahDt4Cmw4x5f7tbVjWZgNBXGfWbG8xC3B2gNCz VfOg/19UfBQWN0cbguPeNZYgeuMkzNe6OyzHfFgyapRQ== ARC-Authentication-Results: i=1; mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linux.intel.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linux.intel.com header.result=pass header_org.domain=intel.com header_org.result=pass header_is_org_domain=no Authentication-Results: mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linux.intel.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linux.intel.com header.result=pass header_org.domain=intel.com header_org.result=pass header_is_org_domain=no Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933698AbeBMP4S (ORCPT ); Tue, 13 Feb 2018 10:56:18 -0500 Received: from mga18.intel.com ([134.134.136.126]:35211 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933440AbeBMP4R (ORCPT ); Tue, 13 Feb 2018 10:56:17 -0500 X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,507,1511856000"; d="scan'208";a="200832115" Date: Tue, 13 Feb 2018 07:56:03 -0800 From: Andi Kleen To: Arjan van de Ven Cc: Greg Kroah-Hartman , Nick Lowe , linux-kernel@vger.kernel.org, stable@vger.kernel.org, David Woodhouse , Thomas Gleixner , Borislav Petkov , Dave Hansen , gnomes@lxorguk.ukuu.org.uk, ashok.raj@intel.com, karahmed@amazon.de, torvalds@linux-foundation.org, peterz@infradead.org, Borislav Petkov , pbonzini@redhat.com, tim.c.chen@linux.intel.com Subject: Re: [PATCH 4.9 43/92] x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown Message-ID: <20180213155603.GK10945@tassilo.jf.intel.com> References: <20180209133931.211869118@linuxfoundation.org> <20180209133934.259299920@linuxfoundation.org> <20180213150007.GJ26982@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.1 (2017-09-22) Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Tue, Feb 13, 2018 at 07:09:44AM -0800, Arjan van de Ven wrote: > > > > So, any hints on what you think should be the correct fix here? > > the patch sure looks correct to me, it now has a nice table for CPU IDs > including all of AMD (and soon hopefully the existing Intel ones that are not exposed to meltdown) I don't think the table is nice, it's a white list that would need to be maintained forever. -Andi