From patchwork Tue Feb 8 00:45:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reinette Chatre X-Patchwork-Id: 12737998 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 8CDDFC4167E for ; Tue, 8 Feb 2022 01:07:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239268AbiBHBHE (ORCPT ); Mon, 7 Feb 2022 20:07:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344148AbiBHAqM (ORCPT ); Mon, 7 Feb 2022 19:46:12 -0500 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C2AC4C043188; Mon, 7 Feb 2022 16:46:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1644281171; x=1675817171; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=n2tussXbA+nZyavb3jVmHg8ajqL6ns6El7v3FjGaYE0=; b=NHd3R7iRcnnTWhcU9jv0jcVprRurgO1oE2TL9DPbhF0Hv9uz7iGU4TYy aelg3NT4kM/zbNXbxWQiGjLsFLMnyj2IuJgTTqY5qHJj3sFtFz8XQIL8B DH9dp9/lpKsqmcA0VDKJpF8SDq/RfQ8xy9QfnFka/hP+4wBmS/ZlngHYS xCsa3Am6K1ViMKoYrDiBY/ox3wNucKvj08TsAb8E3nNJvQGI2CNDzvVAv VCgpspePg2V3TrtPNQjyVI/Q7Bp/wo/nVtsNT8tjsDmKSBUUeqZEQa88I uX9XyKGyjNzWq94kWmf7Ryq4RZi7AE9npkACj8aOfpN9rQjmz9P+B/PT+ g==; X-IronPort-AV: E=McAfee;i="6200,9189,10251"; a="232407940" X-IronPort-AV: E=Sophos;i="5.88,351,1635231600"; d="scan'208";a="232407940" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Feb 2022 16:46:08 -0800 X-IronPort-AV: E=Sophos;i="5.88,351,1635231600"; d="scan'208";a="499389477" Received: from rchatre-ws.ostc.intel.com ([10.54.69.144]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Feb 2022 16:46:08 -0800 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 Cc: seanjc@google.com, kai.huang@intel.com, cathy.zhang@intel.com, cedric.xing@intel.com, haitao.huang@intel.com, mark.shanahan@intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org Subject: [PATCH V2 04/32] x86/sgx: Add wrapper for SGX2 EAUG function Date: Mon, 7 Feb 2022 16:45:26 -0800 Message-Id: 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. Signed-off-by: Reinette Chatre --- 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 */