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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 420DEC433EF for ; Tue, 5 Jul 2022 22:31:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232173AbiGEWbm (ORCPT ); Tue, 5 Jul 2022 18:31:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36500 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230001AbiGEWbk (ORCPT ); Tue, 5 Jul 2022 18:31:40 -0400 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 740A217058 for ; Tue, 5 Jul 2022 15:31:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1657060299; x=1688596299; h=message-id:subject:from:to:cc:date:in-reply-to: references:content-transfer-encoding:mime-version; bh=DZzT8f+uQNK5QnEykXG7AbT4bxjb/H97d5ERA9Tt41U=; b=ZS26EJXqp5f5L9n8TdQPk7md2O/3vR2yAS+oPAGnmW/SO7P31++cP/ZT h1A2FaAU5AVoxpOYXHFjabcd73Fvi+1jUihzd4ivwOmrzWSE9ozd7vIB0 N3cV+LmHHrNF0RLDmIsHnrAtG6iNLFGWrE00buP3eoRcLBStfqU60joJp iDPIP4J5+no9/XLocfrRFHtWqVlWXfwvcuMr39HzjbUfRGyh+vWg1frPV dw5MKfn6aPlU0erHOnOq3cxBHNAs5mYNdElvG4S56jafBvqelwuP+Fzu7 yupXap73PoMgCMs7Zo7TWYChVk/mYGZy/En0wA3e5haEuj2J5OxxtlSLp w==; X-IronPort-AV: E=McAfee;i="6400,9594,10399"; a="281096677" X-IronPort-AV: E=Sophos;i="5.92,248,1650956400"; d="scan'208";a="281096677" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jul 2022 15:31:39 -0700 X-IronPort-AV: E=Sophos;i="5.92,248,1650956400"; d="scan'208";a="590571865" Received: from atornero-mobl1.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.209.166.122]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jul 2022 15:31:34 -0700 Message-ID: <932869b757b384426ada376cd9791697353c2247.camel@intel.com> Subject: Re: [PATCH v8 1/5] x86/tdx: Add TDX Guest attestation interface driver From: Kai Huang To: Sathyanarayanan Kuppuswamy , Dave Hansen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org Cc: "H . Peter Anvin" , "Kirill A . Shutemov" , Tony Luck , Andi Kleen , Wander Lairson Costa , Isaku Yamahata , marcelo.cerri@canonical.com, tim.gardner@canonical.com, khalid.elmously@canonical.com, philip.cox@canonical.com, linux-kernel@vger.kernel.org Date: Wed, 06 Jul 2022 10:31:32 +1200 In-Reply-To: <74383158-460e-0cd1-94bc-faca5b8175ea@linux.intel.com> References: <20220609025220.2615197-1-sathyanarayanan.kuppuswamy@linux.intel.com> <20220609025220.2615197-2-sathyanarayanan.kuppuswamy@linux.intel.com> <0f6bedbb-14cc-bf93-5d9f-bfd2c49dc7b2@intel.com> <48b9d807-2d9e-016f-bada-906911d6ecb0@linux.intel.com> <331abea18e728061979301772a9d0d61543f59fb.camel@intel.com> <0b5884b8-9240-63b2-ca4c-20c86fd2e8c1@linux.intel.com> <8b6f3f9f-71c8-2b6f-20a3-5e9c259a1b9a@intel.com> <74383158-460e-0cd1-94bc-faca5b8175ea@linux.intel.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.44.2 (3.44.2-1.fc36) MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2022-07-05 at 14:21 -0700, Sathyanarayanan Kuppuswamy wrote: > SGX is a related feature. It also uses IOCTL approach for enclave provisi= oning. >=20 > arch/x86/kernel/cpu/sgx/ioctl.c SGX isn't a good example here. The IOCTLs are used to create enclaves, but= not for attestation. SGX attestation relies on enclave itself to get/verify th= e report, etc, so has no interaction with the kernel.