From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 C9CB5C32789 for ; Tue, 6 Nov 2018 13:51:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9E6F52083D for ; Tue, 6 Nov 2018 13:51:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9E6F52083D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-sgx-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388427AbeKFXQw (ORCPT ); Tue, 6 Nov 2018 18:16:52 -0500 Received: from mga18.intel.com ([134.134.136.126]:29048 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388065AbeKFXQw (ORCPT ); Tue, 6 Nov 2018 18:16:52 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Nov 2018 05:51:32 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,472,1534834800"; d="scan'208";a="106322787" Received: from fhoeg-mobl.ger.corp.intel.com (HELO localhost) ([10.249.254.66]) by orsmga002.jf.intel.com with ESMTP; 06 Nov 2018 05:51:26 -0800 From: Jarkko Sakkinen To: x86@kernel.org, platform-driver-x86@vger.kernel.org, linux-sgx@vger.kernel.org Cc: dave.hansen@intel.com, sean.j.christopherson@intel.com, nhorman@redhat.com, npmccallum@redhat.com, serge.ayoun@intel.com, shay.katz-zamir@intel.com, haitao.huang@intel.com, andriy.shevchenko@linux.intel.com, tglx@linutronix.de, kai.svahn@intel.com, Jarkko Sakkinen , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)) Subject: [PATCH v16 12/22] x86/sgx: Add definitions for SGX's CPUID leaf and variable sub-leafs Date: Tue, 6 Nov 2018 15:45:51 +0200 Message-Id: <20181106134758.10572-13-jarkko.sakkinen@linux.intel.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181106134758.10572-1-jarkko.sakkinen@linux.intel.com> References: <20181106134758.10572-1-jarkko.sakkinen@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-sgx-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org Message-ID: <20181106134551.2q3DxJiFgifEQa-j1yYwFlBllhFdOiz17X1nMtfvjh4@z> SGX defines its own CPUID leaf, 0x12, along with a variable number of sub-leafs. Sub-leafs 0 and 1 are always available if SGX is supported and enumerate various SGX features, e.g. instruction sets and enclave capabilities. Sub-leafs 2+ are variable, both in their existence and in what they enumerate. Bits 3:0 of EAX report the sub-leaf type, with the remaining bits in EAX, EBX, ECX and EDX being type-specific. Currently, the only known sub-leaf type enumerates an EPC section. An EPC section is simply a range of EPC memory available to software. The "list" of varaible SGX sub-leafs is NULL-terminated, i.e. software is expected to query CPUID until an invalid sub-leaf is encountered. Signed-off-by: Jarkko Sakkinen Co-developed-by: Sean Christopherson Signed-off-by: Sean Christopherson --- arch/x86/include/asm/sgx_arch.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/x86/include/asm/sgx_arch.h b/arch/x86/include/asm/sgx_arch.h index d4c57154e6e6..188243e3eee1 100644 --- a/arch/x86/include/asm/sgx_arch.h +++ b/arch/x86/include/asm/sgx_arch.h @@ -11,6 +11,21 @@ #include #include +#define SGX_CPUID 0x12 +#define SGX_CPUID_FIRST_VARIABLE_SUB_LEAF 2 + +/** + * enum sgx_sub_leaf_types - SGX CPUID variable sub-leaf types + * %SGX_CPUID_SUB_LEAF_INVALID: Indicates this sub-leaf is invalid. + * %SGX_CPUID_SUB_LEAF_EPC_SECTION: Sub-leaf enumerates an EPC section. + * %SGX_CPUID_SUB_LEAF_TYPE_MASK: Mask for bits containing the type. + */ +enum sgx_sub_leaf_types { + SGX_CPUID_SUB_LEAF_INVALID = 0x0, + SGX_CPUID_SUB_LEAF_EPC_SECTION = 0x1, + SGX_CPUID_SUB_LEAF_TYPE_MASK = GENMASK(3, 0), +}; + /** * enum sgx_encls_leaves - ENCLS leaf functions * %SGX_ECREATE: Create an enclave. -- 2.19.1