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=-16.7 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 2B094C433DB for ; Wed, 17 Feb 2021 22:28:03 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BD5B364E5F for ; Wed, 17 Feb 2021 22:28:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BD5B364E5F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id A34056B0070; Wed, 17 Feb 2021 17:27:59 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 9BAD66B0071; Wed, 17 Feb 2021 17:27:59 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 85D376B0072; Wed, 17 Feb 2021 17:27:59 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0091.hostedemail.com [216.40.44.91]) by kanga.kvack.org (Postfix) with ESMTP id 682A36B0070 for ; Wed, 17 Feb 2021 17:27:59 -0500 (EST) Received: from smtpin11.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 2B7731EF2 for ; Wed, 17 Feb 2021 22:27:59 +0000 (UTC) X-FDA: 77829198678.11.cap76_3605a5527650 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin11.hostedemail.com (Postfix) with ESMTP id C9782180F8B80 for ; Wed, 17 Feb 2021 22:27:58 +0000 (UTC) X-HE-Tag: cap76_3605a5527650 X-Filterd-Recvd-Size: 6049 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by imf50.hostedemail.com (Postfix) with ESMTP for ; Wed, 17 Feb 2021 22:27:57 +0000 (UTC) IronPort-SDR: n5RbR/v6gLj8XwJ3QFFAkRVJMoH7O18i53yc/So2ded0adt/NyHzpF5sl/Q7b1d1XonFF45qqF twMDeXtrrxWg== X-IronPort-AV: E=McAfee;i="6000,8403,9898"; a="170993972" X-IronPort-AV: E=Sophos;i="5.81,185,1610438400"; d="scan'208";a="170993972" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Feb 2021 14:27:54 -0800 IronPort-SDR: UasOZ4Vm829clIWNNXSN+1J06658brj+lwt08234KX7LQhAYHUl5liZsRjJzcKo4Q4L5yVS80t GIi7cXAjLRXw== X-IronPort-AV: E=Sophos;i="5.81,185,1610438400"; d="scan'208";a="400172581" Received: from yyu32-desk.sc.intel.com ([143.183.136.146]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Feb 2021 14:27:53 -0800 From: Yu-cheng Yu To: x86@kernel.org, "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Borislav Petkov , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V. Shankar" , Vedvyas Shanbhogue , Dave Martin , Weijiang Yang , Pengfei Xu , Haitao Huang Cc: Yu-cheng Yu Subject: [PATCH v21 03/26] x86/cpufeatures: Add CET CPU feature flags for Control-flow Enforcement Technology (CET) Date: Wed, 17 Feb 2021 14:27:07 -0800 Message-Id: <20210217222730.15819-4-yu-cheng.yu@intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20210217222730.15819-1-yu-cheng.yu@intel.com> References: <20210217222730.15819-1-yu-cheng.yu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add CPU feature flags for Control-flow Enforcement Technology (CET). CPUID.(EAX=3D7,ECX=3D0):ECX[bit 7] Shadow stack CPUID.(EAX=3D7,ECX=3D0):EDX[bit 20] Indirect Branch Tracking Signed-off-by: Yu-cheng Yu Reviewed-by: Kees Cook --- arch/x86/include/asm/cpufeatures.h | 2 ++ arch/x86/include/asm/disabled-features.h | 12 ++++++++++-- arch/x86/kernel/cpu/cpuid-deps.c | 2 ++ 3 files changed, 14 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cp= ufeatures.h index 84b887825f12..292fe87b26b3 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -345,6 +345,7 @@ #define X86_FEATURE_OSPKE (16*32+ 4) /* OS Protection Keys Enable */ #define X86_FEATURE_WAITPKG (16*32+ 5) /* UMONITOR/UMWAIT/TPAUSE Instru= ctions */ #define X86_FEATURE_AVX512_VBMI2 (16*32+ 6) /* Additional AVX512 Vector = Bit Manipulation Instructions */ +#define X86_FEATURE_SHSTK (16*32+ 7) /* Shadow Stack */ #define X86_FEATURE_GFNI (16*32+ 8) /* Galois Field New Instructions */ #define X86_FEATURE_VAES (16*32+ 9) /* Vector AES */ #define X86_FEATURE_VPCLMULQDQ (16*32+10) /* Carry-Less Multiplication = Double Quadword */ @@ -377,6 +378,7 @@ #define X86_FEATURE_TSXLDTRK (18*32+16) /* TSX Suspend Load Address Tra= cking */ #define X86_FEATURE_PCONFIG (18*32+18) /* Intel PCONFIG */ #define X86_FEATURE_ARCH_LBR (18*32+19) /* Intel ARCH LBR */ +#define X86_FEATURE_IBT (18*32+20) /* Indirect Branch Tracking */ #define X86_FEATURE_AVX512_FP16 (18*32+23) /* AVX512 FP16 */ #define X86_FEATURE_SPEC_CTRL (18*32+26) /* "" Speculation Control (IBR= S + IBPB) */ #define X86_FEATURE_INTEL_STIBP (18*32+27) /* "" Single Thread Indirect= Branch Predictors */ diff --git a/arch/x86/include/asm/disabled-features.h b/arch/x86/include/= asm/disabled-features.h index 7947cb1782da..a66e7f34b788 100644 --- a/arch/x86/include/asm/disabled-features.h +++ b/arch/x86/include/asm/disabled-features.h @@ -68,6 +68,14 @@ # define DISABLE_SGX (1 << (X86_FEATURE_SGX & 31)) #endif =20 +#ifdef CONFIG_X86_CET +#define DISABLE_SHSTK 0 +#define DISABLE_IBT 0 +#else +#define DISABLE_SHSTK (1 << (X86_FEATURE_SHSTK & 31)) +#define DISABLE_IBT (1 << (X86_FEATURE_IBT & 31)) +#endif + /* * Make sure to add features to the correct mask */ @@ -88,9 +96,9 @@ #define DISABLED_MASK14 0 #define DISABLED_MASK15 0 #define DISABLED_MASK16 (DISABLE_PKU|DISABLE_OSPKE|DISABLE_LA57|DISABLE_= UMIP| \ - DISABLE_ENQCMD) + DISABLE_ENQCMD|DISABLE_SHSTK) #define DISABLED_MASK17 0 -#define DISABLED_MASK18 0 +#define DISABLED_MASK18 (DISABLE_IBT) #define DISABLED_MASK_CHECK BUILD_BUG_ON_ZERO(NCAPINTS !=3D 19) =20 #endif /* _ASM_X86_DISABLED_FEATURES_H */ diff --git a/arch/x86/kernel/cpu/cpuid-deps.c b/arch/x86/kernel/cpu/cpuid= -deps.c index 42af31b64c2c..52d9a682a0e6 100644 --- a/arch/x86/kernel/cpu/cpuid-deps.c +++ b/arch/x86/kernel/cpu/cpuid-deps.c @@ -72,6 +72,8 @@ static const struct cpuid_dep cpuid_deps[] =3D { { X86_FEATURE_AVX512_FP16, X86_FEATURE_AVX512BW }, { X86_FEATURE_ENQCMD, X86_FEATURE_XSAVES }, { X86_FEATURE_PER_THREAD_MBA, X86_FEATURE_MBA }, + { X86_FEATURE_SHSTK, X86_FEATURE_XSAVES }, + { X86_FEATURE_IBT, X86_FEATURE_XSAVES }, {} }; =20 --=20 2.21.0