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=-7.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 29B11C433E0 for ; Fri, 15 May 2020 23:07:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 06B6920709 for ; Fri, 15 May 2020 23:07:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589584063; bh=vz66ht54cMc3RYpWc41W0EyO97eRJNrUFQiUdZuTX8Q=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=dGjS1dXRvlQkplzh5XDNet1sTm6DEcGXzqzjkDQGroxx0w2DCrM9GlR1RkfTL6Jfw A873/mwFt/xeEvGRpJbZHPdChUCxnI2vZ7RTHqz92wbcX166DSqfn1vIJ/iIAK/giR Li9Is8MZSxpeM2ayfJGa1KowXueyjyH8TWDGiPts= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727063AbgEOXHm (ORCPT ); Fri, 15 May 2020 19:07:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:47524 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726183AbgEOXHl (ORCPT ); Fri, 15 May 2020 19:07:41 -0400 Received: from localhost (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 54ACA205CB; Fri, 15 May 2020 23:07:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589584061; bh=vz66ht54cMc3RYpWc41W0EyO97eRJNrUFQiUdZuTX8Q=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ujca5DMsp5Ik4R1EtDjzKw0mhCv7WrtoYDRjqs8b0TI8lUUM8G7qPe/H4xd4N5O6X 96zYkBHO3RrHizOqBG4L9Y1HqKjiW8woLZdB34jcoLQS4XbP2i6JwBmVx4oU3uajml koXsISBbdfq/IR/lpp7X5NoGZQxP5tTjFiiI+p9o= Date: Fri, 15 May 2020 19:07:40 -0400 From: Sasha Levin To: Andi Kleen Cc: Jarkko Sakkinen , linux-kernel@vger.kernel.org, tglx@linutronix.de, bp@alien8.de, luto@kernel.org, hpa@zytor.com, dave.hansen@intel.com, tony.luck@intel.com, ravi.v.shankar@intel.com, chang.seok.bae@intel.com Subject: Re: [PATCH v12 00/18] Enable FSGSBASE instructions Message-ID: <20200515230740.GG29995@sasha-vm> References: <20200511045311.4785-1-sashal@kernel.org> <0186c22a8a6be1516df0703c421faaa581041774.camel@linux.intel.com> <20200515164013.GF29995@sasha-vm> <20200515175550.GP3538@tassilo.jf.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20200515175550.GP3538@tassilo.jf.intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 15, 2020 at 10:55:50AM -0700, Andi Kleen wrote: >> Indeed, we've seen a few hacks that basically just enable FSGSBASE: >> >> - https://github.com/oscarlab/graphene-sgx-driver >> - https://github.com/occlum/enable_rdfsbase >> >> And would very much like to get rid of them... > >These are insecure and open root holes without the patches >used here. It's sad that these hacks are being used alongside SGX on "secure" systems. -- Thanks, Sasha