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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 86C5DC433DB for ; Wed, 27 Jan 2021 13:32:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4BA20207B1 for ; Wed, 27 Jan 2021 13:32:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S313040AbhAZWep (ORCPT ); Tue, 26 Jan 2021 17:34:45 -0500 Received: from mga05.intel.com ([192.55.52.43]:26548 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729686AbhAZREy (ORCPT ); Tue, 26 Jan 2021 12:04:54 -0500 IronPort-SDR: yXWIS0fpg/ull7Tuiy5KHnxvdHdrk899Yw29l0p96mtu7fGzOXX6dS8vhfg2fBXjpDJH+li5Q7 oRhH2hzO6wAA== X-IronPort-AV: E=McAfee;i="6000,8403,9876"; a="264758277" X-IronPort-AV: E=Sophos;i="5.79,375,1602572400"; d="scan'208";a="264758277" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2021 09:03:25 -0800 IronPort-SDR: LAkPkzsUHe/EHQWwNtYjCTG7NiK7ch0BYgkP+6XfO9LWj3BDb4u5r1f+y+E5BBf35Hrb5XyonL 2zuAKGui4Sdg== X-IronPort-AV: E=Sophos;i="5.79,375,1602572400"; d="scan'208";a="369168525" Received: from ekfraser-mobl1.amr.corp.intel.com (HELO [10.209.173.94]) ([10.209.173.94]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2021 09:03:22 -0800 Subject: Re: [RFC PATCH v3 08/27] x86/sgx: Initialize virtual EPC driver even when SGX driver is disabled To: Kai Huang , linux-sgx@vger.kernel.org, kvm@vger.kernel.org, x86@kernel.org Cc: seanjc@google.com, jarkko@kernel.org, luto@kernel.org, haitao.huang@intel.com, pbonzini@redhat.com, bp@alien8.de, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com References: <5076ed2c486ac33bfd87dc0e17047a1673692b53.1611634586.git.kai.huang@intel.com> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <5076ed2c486ac33bfd87dc0e17047a1673692b53.1611634586.git.kai.huang@intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 1/26/21 1:31 AM, Kai Huang wrote: > Modify sgx_init() to always try to initialize the virtual EPC driver, > even if the bare-metal SGX driver is disabled. The bare-metal driver > might be disabled if SGX Launch Control is in locked mode, or not > supported in the hardware at all. This allows (non-Linux) guests that > support non-LC configurations to use SGX. One thing worth calling out *somewhere* (which is entirely my fault): "bare-metal" in the context of this patch set refers to true bare-metal, but *ALSO* covers the plain SGX driver running inside a guest. So, perhaps "bare-metal" isn't the best term to use. Again, my bad. Better nomenclature suggestions are welcome.