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=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED 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 C78F2C46475 for ; Thu, 25 Oct 2018 23:31:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6B99A20834 for ; Thu, 25 Oct 2018 23:31:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="gAgHE6W4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6B99A20834 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org 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 S1727589AbeJZIGL (ORCPT ); Fri, 26 Oct 2018 04:06:11 -0400 Received: from mail-lf1-f65.google.com ([209.85.167.65]:39531 "EHLO mail-lf1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727487AbeJZIGL (ORCPT ); Fri, 26 Oct 2018 04:06:11 -0400 Received: by mail-lf1-f65.google.com with SMTP id p11-v6so8099789lfc.6 for ; Thu, 25 Oct 2018 16:31:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=yGqyb+mbavX105TSA1uDZY2XfkRuyiQ52+Ad7XUqfEc=; b=gAgHE6W4y0izmaWpJaxyP960z1gpPE9lsR0o9+EgZhR3v2A+MoHlAEys9Dg0VRbeDq Amey1B5mUStZb16sYc223Cly9uMYiLAhfZLsRdfI5QxXHiOTA3aPcngVp5iIrBn+6Amw C14oWJPDehamc/tRMBai+WHmpBZCHeP1mezDw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=yGqyb+mbavX105TSA1uDZY2XfkRuyiQ52+Ad7XUqfEc=; b=Bkp1fkXbWn+vfBFR6HNwCjn5RrXIjak8ye0ZW5A8Ay6RzAVWOvyC2HnfnjmtDHjgzB 4DmBtk/3a9A8kd34DiZi75G4y2Avme7leJ1V/L7/UMdEeXbK0cdBLT7pTNIemmbRwnZ7 A7wUNffak+0ap5YTDjW82he5qFDk0Gc8eloPDmqizr6m/qmaWnmHqH/gqnlu8mNYiWDx Z/OTaPCi0ZS2z0nTruu4D+Z/yO74XZd99GdqxdFkilPw4dxwZCCCLLcYgsjLkv/SsEyb oXggLVBurXqS93QQz/LXVm7GZeBiTFyLnrrqdyEE1FOWCvfxtMcJfYZoReTuYmRV9Shw KR2g== X-Gm-Message-State: AGRZ1gJ/ttrFW2/+0wcnp0WOCP9ovxCRTkTn73271Tx8fI5Mlgv+EZIZ QpnNcZMhXEEm9p1iZlr5IqXnDpYMhB6nwg== X-Google-Smtp-Source: AJdET5c9ndbFJRclSDS7s9sPD3UvjF6MEuQyzbS7jJs778k6PcfjBUqvnNmbjLAAhdbPKqPjGolpZA== X-Received: by 2002:a19:1019:: with SMTP id f25mr698213lfi.54.1540510291354; Thu, 25 Oct 2018 16:31:31 -0700 (PDT) Received: from mail-lf1-f54.google.com (mail-lf1-f54.google.com. [209.85.167.54]) by smtp.gmail.com with ESMTPSA id p1-v6sm1308090ljc.85.2018.10.25.16.31.30 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 25 Oct 2018 16:31:30 -0700 (PDT) Received: by mail-lf1-f54.google.com with SMTP id n3-v6so8117825lfe.7 for ; Thu, 25 Oct 2018 16:31:30 -0700 (PDT) X-Received: by 2002:a19:288c:: with SMTP id o134-v6mr760019lfo.124.1540510289737; Thu, 25 Oct 2018 16:31:29 -0700 (PDT) MIME-Version: 1.0 References: <20181023184234.14025-1-chang.seok.bae@intel.com> <20181023184234.14025-4-chang.seok.bae@intel.com> <20181024192137.GI6218@tassilo.jf.intel.com> In-Reply-To: From: Linus Torvalds Date: Thu, 25 Oct 2018 16:31:13 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [v3 03/12] x86/fsgsbase/64: Add intrinsics/macros for FSGSBASE instructions To: luto@kernel.org Cc: ak@linux.intel.com, chang.seok.bae@intel.com, Ingo Molnar , tglx@linutronix.de, Peter Anvin , dave.hansen@linux.intel.com, markus.t.metzger@intel.com, ravi.v.shankar@intel.com, Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 25, 2018 at 4:14 PM Andy Lutomirski wrote: > > On Wed, Oct 24, 2018 at 12:21 PM Andi Kleen wrote: > > > > BTW the other option would be to update the min-binutils requirement > > to 2.21 (currently it is 2.20) and then write it directly without .byte. > > I believe 2.21 added support for these instructions. > > > > (It's only a binutils requirement, don't need gcc support) > > I'd personally be fine with this. Linus? Thomas? Ingo? I always vote for "require modern tools" as long as it doesn't cause problems. binutils-2.21 is something like seven years old by now, but the real issue would be what versions distros are actually shipping. I don't want people to have to build their own binutils just to build a kernel. It's usually some ancient enterprise distro that is stuck on old versions. Anybody have any idea? Linus