From patchwork Wed Apr 13 21:10:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reinette Chatre X-Patchwork-Id: 12812681 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 9E8E5C433F5 for ; Wed, 13 Apr 2022 21:11:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239084AbiDMVN3 (ORCPT ); Wed, 13 Apr 2022 17:13:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55230 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239005AbiDMVNG (ORCPT ); Wed, 13 Apr 2022 17:13:06 -0400 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4327F3A5C1; Wed, 13 Apr 2022 14:10:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1649884243; x=1681420243; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yhqYq03R1gOWee2UyUVLupzCQlollDEDnN5WKIJtgE8=; b=H3ZOpCI2gzjHrJlqWE3JJBoLkZojelprf/KvIeouAA9ma8zBpE9UUzZI eQaa3HgL6PIbIGdQL0JuvBKgNIRKXu/MuMVbsbiGUhLyQNiMw42s1arvz /MIbIXLgvD2AJjWmkP+/hiUSekG9kQtSAWzHbEl5rlTNmE/VUJSwgFVnW A2F6GTm/xnwCWnRNMzGGu/VNKBsH1W4RqDwzcCtjLmncU+tOuI8N6FSf/ pucpEzwusAj9alvnpcqC1QtrWNx7PdxJY+WtYvS2mhyQAA+IL/3bp3ynU x41qj5nYt5dSdi8oL+RGD09GdR013KCl8wkGCxPN5I+epR1T4fb8YOpth g==; X-IronPort-AV: E=McAfee;i="6400,9594,10316"; a="323219003" X-IronPort-AV: E=Sophos;i="5.90,257,1643702400"; d="scan'208";a="323219003" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Apr 2022 14:10:41 -0700 X-IronPort-AV: E=Sophos;i="5.90,257,1643702400"; d="scan'208";a="725054246" Received: from rchatre-ws.ostc.intel.com ([10.54.69.144]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Apr 2022 14:10:41 -0700 From: Reinette Chatre To: dave.hansen@linux.intel.com, jarkko@kernel.org, tglx@linutronix.de, bp@alien8.de, luto@kernel.org, mingo@redhat.com, linux-sgx@vger.kernel.org, x86@kernel.org, shuah@kernel.org, linux-kselftest@vger.kernel.org Cc: seanjc@google.com, kai.huang@intel.com, cathy.zhang@intel.com, cedric.xing@intel.com, haitao.huang@intel.com, mark.shanahan@intel.com, vijay.dhanraj@intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org Subject: [PATCH V4 04/31] x86/sgx: Add wrapper for SGX2 EAUG function Date: Wed, 13 Apr 2022 14:10:04 -0700 Message-Id: <62915f9ff84ae41f363a3a67a5a86ee4e0f6cc7e.1649878359.git.reinette.chatre@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org Add a wrapper for the EAUG ENCLS leaf function used to add a page to an initialized enclave. EAUG: 1) Stores all properties of the new enclave page in the SGX hardware's Enclave Page Cache Map (EPCM). 2) Sets the PENDING bit in the EPCM entry of the enclave page. This bit is cleared by the enclave by invoking ENCLU leaf function EACCEPT or EACCEPTCOPY. Access from within the enclave to the new enclave page is not possible until the PENDING bit is cleared. Reviewed-by: Jarkko Sakkinen Signed-off-by: Reinette Chatre --- Changes since V3: - Add Jarkko's Reviewed-by tag. Changes since V1: - Split original patch ("x86/sgx: Add wrappers for SGX2 functions") in three to introduce the SGX2 functions separately (Jarkko). - Rewrite commit message to include how the EPCM within the hardware is changed by the SGX2 function as well as any calling conditions (Jarkko). arch/x86/kernel/cpu/sgx/encls.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/kernel/cpu/sgx/encls.h b/arch/x86/kernel/cpu/sgx/encls.h index 7a1ecf704ec1..99004b02e2ed 100644 --- a/arch/x86/kernel/cpu/sgx/encls.h +++ b/arch/x86/kernel/cpu/sgx/encls.h @@ -227,4 +227,10 @@ static inline int __emodt(struct sgx_secinfo *secinfo, void *addr) return __encls_ret_2(EMODT, secinfo, addr); } +/* Zero a page of EPC memory and add it to an initialized enclave. */ +static inline int __eaug(struct sgx_pageinfo *pginfo, void *addr) +{ + return __encls_2(EAUG, pginfo, addr); +} + #endif /* _X86_ENCLS_H */