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=-5.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,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 5AD94C433DF for ; Sat, 16 May 2020 12:21:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3BDE0207F9 for ; Sat, 16 May 2020 12:21:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726259AbgEPMVM (ORCPT ); Sat, 16 May 2020 08:21:12 -0400 Received: from mga02.intel.com ([134.134.136.20]:40967 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726219AbgEPMVL (ORCPT ); Sat, 16 May 2020 08:21:11 -0400 IronPort-SDR: D7ST/xiMIg6iJLqYuhWeDdH92Yd6ichsYCVNsx51lKJPznBNn5QRNjqfeFKl0KyO83dwaI+Fdr o2XKGygB5GAw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 May 2020 05:21:11 -0700 IronPort-SDR: sqNFnfn6/3GsBFxZeUWVfwbPj2OofvafDAdeZ11Ok8vxej578NFxZvq23Fd0gA1Tzxr1IaqKgT iAlyWhPbOyxg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,398,1583222400"; d="scan'208";a="465047818" Received: from ebutchex-mobl1.ger.corp.intel.com ([10.249.40.79]) by fmsmga005.fm.intel.com with ESMTP; 16 May 2020 05:21:07 -0700 Message-ID: Subject: Re: [PATCH v12 00/18] Enable FSGSBASE instructions From: Jarkko Sakkinen To: Andi Kleen , Sasha Levin Cc: 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 Date: Sat, 16 May 2020 15:21:06 +0300 In-Reply-To: <20200515175550.GP3538@tassilo.jf.intel.com> References: <20200511045311.4785-1-sashal@kernel.org> <0186c22a8a6be1516df0703c421faaa581041774.camel@linux.intel.com> <20200515164013.GF29995@sasha-vm> <20200515175550.GP3538@tassilo.jf.intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.36.1-2 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 Fri, 2020-05-15 at 10:55 -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. > > -Andi Yup, totally. /Jarkko