From patchwork Sun Mar 26 06:20:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuppuswamy Sathyanarayanan X-Patchwork-Id: 13187998 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 18089C761AF for ; Sun, 26 Mar 2023 06:20:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231171AbjCZGUz (ORCPT ); Sun, 26 Mar 2023 02:20:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36366 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229523AbjCZGUw (ORCPT ); Sun, 26 Mar 2023 02:20:52 -0400 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F2A340FD; Sat, 25 Mar 2023 23:20:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679811650; x=1711347650; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=SyfK9Omb+5LaXVWXFJR8Lfqtv+Cz1gSgt2M7uXUhVTU=; b=ClIrJmaPqnX12vp81flHsSHXe3wNCvLm1I2ahsv9NkUID7H7LK2BLKPj gldNMmEvT59wSHRA7CVSrW9vD3RmOfJOINX3Gfu7IPmnhJrH6KNruWKRa 6v8YFrnBeVd4Hz8spp/XyPyJnjplS4wnXCcQw9Wi1W0ppGWSjAZHF1/Cv 1OiEmebFomAm7xK/zSraxFMWCdCVziMJlaa32iRD/bDEnBxx+cOibJbuN 6qBGcU/2o0JLVLZahnCgTIi9iswKhwWxzAskG3oZHxWnr81Nr+7st46MB TrXqnpfGJ4b828pASsbCgE+tOWEnmx2raodeV1M7/6gG5nQKGudWrc7fU g==; X-IronPort-AV: E=McAfee;i="6600,9927,10660"; a="341628530" X-IronPort-AV: E=Sophos;i="5.98,292,1673942400"; d="scan'208";a="341628530" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Mar 2023 23:20:50 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10660"; a="660510701" X-IronPort-AV: E=Sophos;i="5.98,292,1673942400"; d="scan'208";a="660510701" Received: from srivats1-mobl.amr.corp.intel.com (HELO skuppusw-desk1.amr.corp.intel.com) ([10.209.108.178]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Mar 2023 23:20:49 -0700 From: Kuppuswamy Sathyanarayanan To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, Shuah Khan , Jonathan Corbet Cc: "H . Peter Anvin" , Kuppuswamy Sathyanarayanan , "Kirill A . Shutemov" , Tony Luck , Wander Lairson Costa , Erdem Aktas , Guorui Yu , Du Fan , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v1 0/3] TDX Guest Quote generation support Date: Sat, 25 Mar 2023 23:20:36 -0700 Message-Id: <20230326062039.341479-1-sathyanarayanan.kuppuswamy@linux.intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Hi All, In TDX guest, the attestation process is used to verify the TDX guest trustworthiness to other entities before provisioning secrets to the guest. The TDX guest attestation process consists of two steps: 1. TDREPORT generation 2. Quote generation. The First step (TDREPORT generation) involves getting the TDX guest measurement data in the format of TDREPORT which is further used to validate the authenticity of the TDX guest. The second step involves sending the TDREPORT to a Quoting Enclave (QE) server to generate a remotely verifiable Quote. TDREPORT by design can only be verified on the local platform. To support remote verification of the TDREPORT, TDX leverages Intel SGX Quoting Enclave to verify the TDREPORT locally and convert it to a remotely verifiable Quote. Although attestation software can use communication methods like TCP/IP or vsock to send the TDREPORT to QE, not all platforms support these communication models. So TDX GHCI specification [1] defines a method for Quote generation via hypercalls. Please check the discussion from Google [2] and Alibaba [3] which clarifies the need for hypercall based Quote generation support. This patch set adds this support. Support for TDREPORT generation already exists in the TDX guest driver. This patchset extends the same driver to add the Quote generation support. Following are the details of the patch set: Patch 1/3 -> Adds event notification IRQ support. Patch 2/3 -> Adds Quote generation support. Patch 3/3 -> Adds selftest support for Quote generation feature. [1] https://cdrdv2.intel.com/v1/dl/getContent/726790, section titled "TDG.VP.VMCALL". [2] https://lore.kernel.org/lkml/CAAYXXYxxs2zy_978GJDwKfX5Hud503gPc8=1kQ-+JwG_kA79mg@mail.gmail.com/ [3] https://lore.kernel.org/lkml/a69faebb-11e8-b386-d591-dbd08330b008@linux.alibaba.com/ Kuppuswamy Sathyanarayanan (3): x86/tdx: Add TDX Guest event notify interrupt support virt: tdx-guest: Add Quote generation support selftests/tdx: Test GetQuote TDX attestation feature Documentation/virt/coco/tdx-guest.rst | 11 + arch/x86/coco/tdx/tdx.c | 203 +++++++++++++++ arch/x86/include/asm/tdx.h | 8 + drivers/virt/coco/tdx-guest/tdx-guest.c | 249 ++++++++++++++++++- include/uapi/linux/tdx-guest.h | 44 ++++ tools/testing/selftests/tdx/tdx_guest_test.c | 68 ++++- 6 files changed, 575 insertions(+), 8 deletions(-)