From patchwork Mon Feb 8 10:54:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Huang, Kai" X-Patchwork-Id: 12074943 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 DA008C433DB for ; Mon, 8 Feb 2021 10:59:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7644C64E7B for ; Mon, 8 Feb 2021 10:59:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232513AbhBHK5X (ORCPT ); Mon, 8 Feb 2021 05:57:23 -0500 Received: from mga12.intel.com ([192.55.52.136]:12408 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232768AbhBHKzR (ORCPT ); Mon, 8 Feb 2021 05:55:17 -0500 IronPort-SDR: EVi5Epjrh7LKnzQK2UIVMGdSZSaWcnRKU7z3xlvFInyEje8CtoS1gzKUnMD/Kd8uXFIaF8gzK5 RqFi/kYYYqtw== X-IronPort-AV: E=McAfee;i="6000,8403,9888"; a="160848439" X-IronPort-AV: E=Sophos;i="5.81,161,1610438400"; d="scan'208";a="160848439" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Feb 2021 02:54:30 -0800 IronPort-SDR: +wJPqe9YHzqc4+stkICHgYNTAX0B5MZUJPnz5waZi4L97shtKzGIonXs2sFSVXLKaccLkVcdz1 w20I20sH7OBg== X-IronPort-AV: E=Sophos;i="5.81,161,1610438400"; d="scan'208";a="374450958" Received: from jaeminha-mobl.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.251.11.62]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Feb 2021 02:54:26 -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, rick.p.edgecombe@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 v4 02/26] x86/cpufeatures: Add SGX1 and SGX2 sub-features Date: Mon, 8 Feb 2021 23:54:06 +1300 Message-Id: <3e7f24c8d5341f71df6f96fabe6c6ca564c90bcb.1612777752.git.kai.huang@intel.com> 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 SGX1 and SGX2 feature flags, via CPUID.0x12.0x0.EAX, as scattered features, since adding a new leaf for only two bits would be wasteful. As part of virtualizing SGX, KVM will expose the SGX CPUID leafs to its guest, and to do so correctly needs to query hardware and kernel support for SGX1 and SGX2. Signed-off-by: Sean Christopherson Signed-off-by: Kai Huang Acked-by: Dave Hansen --- v3->v4: - Refined the comments of SGX1/SGX2 bits, per comments from Dave, Paolo, Sean and Jarkko. - Moved this patch after the patch which moves SGX_LC to cpuid_deps[] table too. v2->v3: - Split moving SGX_LC to cpuid-deps table logic into separate patch. --- arch/x86/include/asm/cpufeatures.h | 2 ++ arch/x86/kernel/cpu/cpuid-deps.c | 2 ++ arch/x86/kernel/cpu/scattered.c | 2 ++ 3 files changed, 6 insertions(+) diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index 84b887825f12..0432e7303996 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -292,6 +292,8 @@ #define X86_FEATURE_FENCE_SWAPGS_KERNEL (11*32+ 5) /* "" LFENCE in kernel entry SWAPGS path */ #define X86_FEATURE_SPLIT_LOCK_DETECT (11*32+ 6) /* #AC for split lock */ #define X86_FEATURE_PER_THREAD_MBA (11*32+ 7) /* "" Per-thread Memory Bandwidth Allocation */ +#define X86_FEATURE_SGX1 (11*32+ 8) /* "" Basic SGX */ +#define X86_FEATURE_SGX2 (11*32+ 9) /* SGX Enclave Dynamic Memory Management (EDMM) */ /* Intel-defined CPU features, CPUID level 0x00000007:1 (EAX), word 12 */ #define X86_FEATURE_AVX512_BF16 (12*32+ 5) /* AVX512 BFLOAT16 instructions */ diff --git a/arch/x86/kernel/cpu/cpuid-deps.c b/arch/x86/kernel/cpu/cpuid-deps.c index d40f8e0a54ce..defda61f372d 100644 --- a/arch/x86/kernel/cpu/cpuid-deps.c +++ b/arch/x86/kernel/cpu/cpuid-deps.c @@ -73,6 +73,8 @@ static const struct cpuid_dep cpuid_deps[] = { { X86_FEATURE_ENQCMD, X86_FEATURE_XSAVES }, { X86_FEATURE_PER_THREAD_MBA, X86_FEATURE_MBA }, { X86_FEATURE_SGX_LC, X86_FEATURE_SGX }, + { X86_FEATURE_SGX1, X86_FEATURE_SGX }, + { X86_FEATURE_SGX2, X86_FEATURE_SGX1 }, {} }; diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c index 236924930bf0..fea0df867d18 100644 --- a/arch/x86/kernel/cpu/scattered.c +++ b/arch/x86/kernel/cpu/scattered.c @@ -36,6 +36,8 @@ static const struct cpuid_bit cpuid_bits[] = { { X86_FEATURE_CDP_L2, CPUID_ECX, 2, 0x00000010, 2 }, { X86_FEATURE_MBA, CPUID_EBX, 3, 0x00000010, 0 }, { X86_FEATURE_PER_THREAD_MBA, CPUID_ECX, 0, 0x00000010, 3 }, + { X86_FEATURE_SGX1, CPUID_EAX, 0, 0x00000012, 0 }, + { X86_FEATURE_SGX2, CPUID_EAX, 1, 0x00000012, 0 }, { X86_FEATURE_HW_PSTATE, CPUID_EDX, 7, 0x80000007, 0 }, { X86_FEATURE_CPB, CPUID_EDX, 9, 0x80000007, 0 }, { X86_FEATURE_PROC_FEEDBACK, CPUID_EDX, 11, 0x80000007, 0 },