From patchwork Mon Jan 18 03:26:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kai Huang X-Patchwork-Id: 12026361 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 9415BC433E9 for ; Mon, 18 Jan 2021 03:28:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6B968224BD for ; Mon, 18 Jan 2021 03:28:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731621AbhARD2Q (ORCPT ); Sun, 17 Jan 2021 22:28:16 -0500 Received: from mga14.intel.com ([192.55.52.115]:9511 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731599AbhARD2E (ORCPT ); Sun, 17 Jan 2021 22:28:04 -0500 IronPort-SDR: Hw54pXySJkBHp0ta6ZO3AC4Oy95DgUzpXW8leZ+ylv9jCRvJwmMRQBrzNflsYchcDpkIuQfhnt 5BlKxhy0B9Kg== X-IronPort-AV: E=McAfee;i="6000,8403,9867"; a="177975336" X-IronPort-AV: E=Sophos;i="5.79,355,1602572400"; d="scan'208";a="177975336" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Jan 2021 19:27:15 -0800 IronPort-SDR: FUpiJ7pIQRFLgovY9Q/mB3ZzGPvR1PXhPIUTB7h6ntRvZWYNmahB2L8zK/QTkArAE5LwaaHBwO 8sA6I4bCbE5A== X-IronPort-AV: E=Sophos;i="5.79,355,1602572400"; d="scan'208";a="573150738" Received: from amrahman-mobl.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.252.142.253]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Jan 2021 19:27:12 -0800 From: Kai Huang To: linux-sgx@vger.kernel.org, kvm@vger.kernel.org, x86@kernel.org Cc: seanjc@google.com, jarkko@kernel.org, luto@kernel.org, dave.hansen@intel.com, haitao.huang@intel.com, pbonzini@redhat.com, bp@alien8.de, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, Kai Huang Subject: [RFC PATCH v2 04/26] x86/sgx: Add SGX_CHILD_PRESENT hardware error code Date: Mon, 18 Jan 2021 16:26:52 +1300 Message-Id: <9638853bc880d5699e01bdf14b37814e2b08065f.1610935432.git.kai.huang@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Sean Christopherson SGX virtualization requires to allocate "raw" EPC and use it as "virtual EPC" for SGX guest. Unlike EPC used by SGX driver, virtual EPC doesn't track how EPC pages are used in VM, e.g. (de)construction of enclaves, so it cannot guarantee EREMOVE success, e.g. it doesn't have a priori knowledge of which pages are SECS with non-zero child counts. Add SGX_CHILD_PRESENT for use by SGX virtualization to assert EREMOVE failures are expected, but only due to SGX_CHILD_PRESENT. Signed-off-by: Sean Christopherson Acked-by: Jarkko Sakkinen Signed-off-by: Kai Huang --- v1->v2: - Change title to reflect hardware error code. --- arch/x86/kernel/cpu/sgx/arch.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kernel/cpu/sgx/arch.h b/arch/x86/kernel/cpu/sgx/arch.h index dd7602c44c72..56b0f8ae3f92 100644 --- a/arch/x86/kernel/cpu/sgx/arch.h +++ b/arch/x86/kernel/cpu/sgx/arch.h @@ -26,12 +26,14 @@ * enum sgx_return_code - The return code type for ENCLS, ENCLU and ENCLV * %SGX_NOT_TRACKED: Previous ETRACK's shootdown sequence has not * been completed yet. + * %SGX_CHILD_PRESENT Enclave has child pages present in the EPC. * %SGX_INVALID_EINITTOKEN: EINITTOKEN is invalid and enclave signer's * public key does not match IA32_SGXLEPUBKEYHASH. * %SGX_UNMASKED_EVENT: An unmasked event, e.g. INTR, was received */ enum sgx_return_code { SGX_NOT_TRACKED = 11, + SGX_CHILD_PRESENT = 13, SGX_INVALID_EINITTOKEN = 16, SGX_UNMASKED_EVENT = 128, };