From patchwork Fri Mar 4 09:34:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 12768843 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 4AD9BC433EF for ; Fri, 4 Mar 2022 09:38:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239087AbiCDJiv (ORCPT ); Fri, 4 Mar 2022 04:38:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53890 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238275AbiCDJhq (ORCPT ); Fri, 4 Mar 2022 04:37:46 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9EF201A8C95; Fri, 4 Mar 2022 01:36:16 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 0E3E5B827B1; Fri, 4 Mar 2022 09:36:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7C985C340F1; Fri, 4 Mar 2022 09:36:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1646386573; bh=hVi53zxhpZZwfLO+QSjSvU5hkK9i3hr9I45N4lSNasI=; h=From:To:Cc:Subject:Date:From; b=a/QlWblvp5nbCk0pW27X8PXtdW6OZFJvy2k0QHBEP0OHn3Rq6dIW8Ef+mgBRgbias XJMgTvrb/hYG0mAiseTuy+HabUHMozGx/Slb0S2J5l9FRLF+j/4TFWllBME27JnHiY imLhzJEMBynIs9EdMJfLTSsaJUYnCcU6SBfjKzzSaEUmkaNJfz7W6KoPpPppAQKGwK Y9WB9P9J7IOk+HSAcu1ZGl65u6F4WjO3iboYlAdWxUY0p2ZjbgeZPJUmKeD/UPgOF9 BJUSPvcj4VLMfqoGwU2kB30rtIrhWF5CHmYqz/WOfq8cyfP3XE5k6z0ydHxh1wHFET 3EQX6kfh505Mw== From: Jarkko Sakkinen To: linux-sgx@vger.kernel.org Cc: Nathaniel McCallum , Reinette Chatre , Dave Hansen , Jarkko Sakkinen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), "H. Peter Anvin" , linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)) Subject: [RFC PATCH v2.1 01/30] x86/sgx: Add short descriptions to ENCLS wrappers Date: Fri, 4 Mar 2022 11:34:55 +0200 Message-Id: <20220304093524.397485-1-jarkko@kernel.org> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org From: Reinette Chatre The SGX ENCLS instruction uses EAX to specify an SGX function and may require additional registers, depending on the SGX function. ENCLS invokes the specified privileged SGX function for managing and debugging enclaves. Macros are used to wrap the ENCLS functionality and several wrappers are used to wrap the macros to make the different SGX functions accessible in the code. The wrappers of the supported SGX functions are cryptic. Add short descriptions of each as a comment. Suggested-by: Dave Hansen Signed-off-by: Reinette Chatre --- arch/x86/kernel/cpu/sgx/encls.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/x86/kernel/cpu/sgx/encls.h b/arch/x86/kernel/cpu/sgx/encls.h index fa04a73daf9c..0e22fa8f77c5 100644 --- a/arch/x86/kernel/cpu/sgx/encls.h +++ b/arch/x86/kernel/cpu/sgx/encls.h @@ -136,57 +136,71 @@ static inline bool encls_failed(int ret) ret; \ }) +/* Initialize an EPC page into an SGX Enclave Control Structure (SECS) page. */ static inline int __ecreate(struct sgx_pageinfo *pginfo, void *secs) { return __encls_2(ECREATE, pginfo, secs); } +/* Hash a 256 byte region of an enclave page to SECS:MRENCLAVE. */ static inline int __eextend(void *secs, void *addr) { return __encls_2(EEXTEND, secs, addr); } +/* + * Associate an EPC page to an enclave either as a REG or TCS page + * populated with the provided data. + */ static inline int __eadd(struct sgx_pageinfo *pginfo, void *addr) { return __encls_2(EADD, pginfo, addr); } +/* Finalize enclave build, initialize enclave for user code execution. */ static inline int __einit(void *sigstruct, void *token, void *secs) { return __encls_ret_3(EINIT, sigstruct, secs, token); } +/* Disassociate EPC page from its enclave and mark it as unused. */ static inline int __eremove(void *addr) { return __encls_ret_1(EREMOVE, addr); } +/* Copy data to an EPC page belonging to a debug enclave. */ static inline int __edbgwr(void *addr, unsigned long *data) { return __encls_2(EDGBWR, *data, addr); } +/* Copy data from an EPC page belonging to a debug enclave. */ static inline int __edbgrd(void *addr, unsigned long *data) { return __encls_1_1(EDGBRD, *data, addr); } +/* Track that software has completed the required TLB address clears. */ static inline int __etrack(void *addr) { return __encls_ret_1(ETRACK, addr); } +/* Load, verify, and unblock an EPC page. */ static inline int __eldu(struct sgx_pageinfo *pginfo, void *addr, void *va) { return __encls_ret_3(ELDU, pginfo, addr, va); } +/* Make EPC page inaccessible to enclave, ready to be written to memory. */ static inline int __eblock(void *addr) { return __encls_ret_1(EBLOCK, addr); } +/* Initialize an EPC page into a Version Array (VA) page. */ static inline int __epa(void *addr) { unsigned long rbx = SGX_PAGE_TYPE_VA; @@ -194,6 +208,7 @@ static inline int __epa(void *addr) return __encls_2(EPA, rbx, addr); } +/* Invalidate an EPC page and write it out to main memory. */ static inline int __ewb(struct sgx_pageinfo *pginfo, void *addr, void *va) {