From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DDE6DECDFAA for ; Mon, 16 Jul 2018 18:55:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A314F208FA for ; Mon, 16 Jul 2018 18:55:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A314F208FA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729840AbeGPTXt (ORCPT ); Mon, 16 Jul 2018 15:23:49 -0400 Received: from mga05.intel.com ([192.55.52.43]:14694 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728285AbeGPTXt (ORCPT ); Mon, 16 Jul 2018 15:23:49 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 Jul 2018 11:55:06 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,362,1526367600"; d="scan'208";a="73246163" Received: from acox1-desk1.ger.corp.intel.com ([10.252.0.209]) by orsmga001.jf.intel.com with ESMTP; 16 Jul 2018 11:55:04 -0700 Message-ID: <1531767303.4364.109.camel@linux.intel.com> Subject: Re: cpu_no_speculation omissions? From: Alan Cox To: Dave Hansen , Thomas Gleixner , Rich Felker Cc: x86@kernel.org, Ingo Molnar , "H. Peter Anvin" , David Woodhouse , LKML Date: Mon, 16 Jul 2018 19:55:03 +0100 In-Reply-To: <193fb2f5-8f6c-8fe6-298f-a6af4fae862a@linux.intel.com> References: <20180716160513.GA6080@brightrain.aerifal.cx> <193fb2f5-8f6c-8fe6-298f-a6af4fae862a@linux.intel.com> Organization: Intel Corporation Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.26.6 (3.26.6-1.fc27) Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2018-07-16 at 10:28 -0700, Dave Hansen wrote: > On 07/16/2018 09:56 AM, Thomas Gleixner wrote: > > On Mon, 16 Jul 2018, Rich Felker wrote: > > > At least the Centerton (late-generation Bonnell uarch) Atom > > > family is > > > omitted from the cpu_no_speculation table added by commit > > > fec9434a12f3 > > > to arch/x86/kernel/cpu/common.c. Is this intentional? Would a > > > patch > > > adding it and possibly other omissions be welcome? > > > > Probably. Dave? > > IIRC, Alan Cox was compiling a list on what is affected vs. not. He > would know way better than I. The pre Silvermont atom cores are in order. When I did the original list I didn't bother with all the 32bit cores as we didn't have any 32bit mitigations then. Alan