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=-10.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 49C52C433DB for ; Fri, 5 Mar 2021 17:46:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 15FFF650A4 for ; Fri, 5 Mar 2021 17:46:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229576AbhCERpd (ORCPT ); Fri, 5 Mar 2021 12:45:33 -0500 Received: from mga18.intel.com ([134.134.136.126]:54731 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229582AbhCERpH (ORCPT ); Fri, 5 Mar 2021 12:45:07 -0500 IronPort-SDR: AmyNlOqGXt3PIXnKjw/DWr0Lu52G6TlKpOcU3DIwipZQ1UhNXWAToi6ycUgUKpj1VZOeds/USY 6363DE7bdXzw== X-IronPort-AV: E=McAfee;i="6000,8403,9914"; a="175319806" X-IronPort-AV: E=Sophos;i="5.81,225,1610438400"; d="scan'208";a="175319806" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2021 09:45:07 -0800 IronPort-SDR: 2mL8NavIvwPjIY4yUi/58xPWUm2NyMEn55vffISZmeTbWzrjdlDJEve2WC0DolZPkGJi6Cr6ko FOlV947p3TpQ== X-IronPort-AV: E=Sophos;i="5.81,225,1610438400"; d="scan'208";a="508138962" Received: from gmschinx-mobl1.amr.corp.intel.com (HELO [10.212.191.102]) ([10.212.191.102]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2021 09:45:06 -0800 From: Dave Hansen Subject: Re: [RFC PATCH v6 14/25] x86/sgx: Move provisioning device creation out of SGX driver 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, rick.p.edgecombe@intel.com, haitao.huang@intel.com, pbonzini@redhat.com, bp@alien8.de, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com References: <684c77211acfa1b162d8fbcf507b17d84da5ac11.1614338774.git.kai.huang@intel.com> 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: <684c77211acfa1b162d8fbcf507b17d84da5ac11.1614338774.git.kai.huang@intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org On 2/26/21 4:15 AM, Kai Huang wrote: > From: Sean Christopherson > > And extract sgx_set_attribute() out of sgx_ioc_enclave_provision() and > export it as symbol for KVM to use. > > Provisioning key is sensitive. SGX driver only allows to create enclave > which can access provisioning key when enclave creator has permission to > open /dev/sgx_provision. It should apply to VM as well, as provisioning > key is platform specific, thus unrestricted VM can also potentially > compromise provisioning key. > > Move provisioning device creation out of sgx_drv_init() to sgx_init() as > preparation for adding SGX virtualization support, so that even SGX > driver is not enabled due to flexible launch control is not available, > SGX virtualization can still be enabled, and use it to restrict VM's > capability of being able to access provisioning key. > > Signed-off-by: Sean Christopherson > Reviewed-by: Jarkko Sakkinen > Signed-off-by: Kai Huang Acked-by: Dave Hansen