From patchwork Tue Jan 26 09:31:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Huang, Kai" X-Patchwork-Id: 12045967 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=-16.8 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=ham 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 CDE84C433DB for ; Tue, 26 Jan 2021 09:33:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7EFA523109 for ; Tue, 26 Jan 2021 09:33:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731033AbhAZJdP (ORCPT ); Tue, 26 Jan 2021 04:33:15 -0500 Received: from mga03.intel.com ([134.134.136.65]:12818 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391225AbhAZJcS (ORCPT ); Tue, 26 Jan 2021 04:32:18 -0500 IronPort-SDR: vebnKTNKvDzO6ZAnim16Wt1+PpWy6SKYBth2iRyMJ+pxELA0rkrrIxnvxopUaQa3L4jmGTu2FP UXIsYuEimKoQ== X-IronPort-AV: E=McAfee;i="6000,8403,9875"; a="179954923" X-IronPort-AV: E=Sophos;i="5.79,375,1602572400"; d="scan'208";a="179954923" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2021 01:31:36 -0800 IronPort-SDR: MpCTkCaFaceQzYkWQcy3jJKRwwpD689TNWiFd++sKQlDhk83W8bRYnf3r4ZLHkbNJGOOtP0EWC 9RQr9KJEYolw== X-IronPort-AV: E=Sophos;i="5.79,375,1602572400"; d="scan'208";a="577747732" Received: from ravivisw-mobl1.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.254.124.51]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2021 01:31:32 -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 v3 12/27] x86/sgx: Add encls_faulted() helper Date: Tue, 26 Jan 2021 22:31:04 +1300 Message-Id: X-Mailer: git-send-email 2.29.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org From: Sean Christopherson Add a helper to extract the fault indicator from an encoded ENCLS return value. SGX virtualization will also need to detect ENCLS faults. Signed-off-by: Sean Christopherson Acked-by: Dave Hansen Signed-off-by: Kai Huang Acked-by: Jarkko Sakkinen --- v2->v3: - Changed commenting style for return value, per Jarkko. --- arch/x86/kernel/cpu/sgx/encls.h | 15 ++++++++++++++- arch/x86/kernel/cpu/sgx/ioctl.c | 2 +- 2 files changed, 15 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/cpu/sgx/encls.h b/arch/x86/kernel/cpu/sgx/encls.h index be5c49689980..3219d011ee28 100644 --- a/arch/x86/kernel/cpu/sgx/encls.h +++ b/arch/x86/kernel/cpu/sgx/encls.h @@ -40,6 +40,19 @@ } while (0); \ } +/* + * encls_faulted() - Check if an ENCLS leaf faulted given an error code + * @ret the return value of an ENCLS leaf function call + * + * Return: + * - true: ENCLS leaf faulted. + * - false: Otherwise. + */ +static inline bool encls_faulted(int ret) +{ + return ret & ENCLS_FAULT_FLAG; +} + /** * encls_failed() - Check if an ENCLS function failed * @ret: the return value of an ENCLS function call @@ -50,7 +63,7 @@ */ static inline bool encls_failed(int ret) { - if (ret & ENCLS_FAULT_FLAG) + if (encls_faulted(ret)) return ENCLS_TRAPNR(ret) != X86_TRAP_PF; return !!ret; diff --git a/arch/x86/kernel/cpu/sgx/ioctl.c b/arch/x86/kernel/cpu/sgx/ioctl.c index 90a5caf76939..e5977752c7be 100644 --- a/arch/x86/kernel/cpu/sgx/ioctl.c +++ b/arch/x86/kernel/cpu/sgx/ioctl.c @@ -568,7 +568,7 @@ static int sgx_encl_init(struct sgx_encl *encl, struct sgx_sigstruct *sigstruct, } } - if (ret & ENCLS_FAULT_FLAG) { + if (encls_faulted(ret)) { if (encls_failed(ret)) ENCLS_WARN(ret, "EINIT");