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=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 E311AC2BB55 for ; Thu, 16 Apr 2020 16:13:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BA084206E9 for ; Thu, 16 Apr 2020 16:13:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="sLxFQroY" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2506912AbgDPQN3 (ORCPT ); Thu, 16 Apr 2020 12:13:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53350 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S2506879AbgDPQNL (ORCPT ); Thu, 16 Apr 2020 12:13:11 -0400 Received: from mail-pf1-x449.google.com (mail-pf1-x449.google.com [IPv6:2607:f8b0:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CA372C061A0C for ; Thu, 16 Apr 2020 09:13:11 -0700 (PDT) Received: by mail-pf1-x449.google.com with SMTP id c62so3434776pfc.12 for ; Thu, 16 Apr 2020 09:13:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=SV1DVkULqNa+FuGbiBRMBHT4OnEsBDpzGAv6cWsD5ng=; b=sLxFQroYETeBwkC7GL2sYyxH2hNaeokGKsdeLtXjhCO6cOtPj2JOlGsmapVVPWTSK1 uZovYKEMjxeKiEqbJmm1N7h1ZuFNEWeqj4HZX6p71THvzQF8G9M+4JNKvHa1/tmuIfCm 6EVESi0OEnWDzNouoomBEUVi/Rq0z+KDY6RjRyGUB3tsfFtJuEFP+col35MQzcyIEv98 JSCbKVeCMC9JhoiaW1ka8ABAA/JedzZ9Vi0vS2OTLgQwsGeOmODa1mbGdE1L5+3CEz9R c0a2TlVnEXnb/0S7j/hvoXDbtLEn1ydd7L+LiJbescqWyWwpPatKM4QMw31dYxQHQmR6 pJZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=SV1DVkULqNa+FuGbiBRMBHT4OnEsBDpzGAv6cWsD5ng=; b=S0gvjPNr7hEPe4p4NNs2SAJDDe+hVaACnJmfOeq4UajM+WCE0OgGxceegaNSJFNubT IRwybk+o2z0+8g2Y5D5YgsvvqHkIuw+XiPHjldGGqT1thBk3O5sqFh40VrvOyUfoHDex Q/+sa0Tf7W2ometslhUy2LXD/g7f5VaRUJ6+oToljtkWPuO/AL2tCrKovv3g9KLTzQmg O8qSBNvJEcvnigY1apwjT8/qtpF6rkNqnmpOmRetnKn+sLTTPBGRYJDseMceiQIV2K4/ 0mIHGCNFyygnqjpBW8TGgU+CvmqFVLydRvdhXoAUr4PIWiXNKb83jWZB1YrTODomWJyi 0M4A== X-Gm-Message-State: AGi0PuajAIaRgVcvJNHcUGRDw9DCwPlfUEMAlZjFBM/1OZwFTeR7gD3V 8/5IFHczWGa+c9iPF3C7HBb5lSMm8G8RlhZ5n2g= X-Google-Smtp-Source: APiQypJNkpQBGKyIWPV2BtmwX/E/gHMUX9jAQmns+9eOAcaQtZAXVp0Bz90VtPtI2vifzdaZP44LMcdHl+FTfzmDINE= X-Received: by 2002:a63:ca41:: with SMTP id o1mr33386721pgi.419.1587053591236; Thu, 16 Apr 2020 09:13:11 -0700 (PDT) Date: Thu, 16 Apr 2020 09:12:42 -0700 In-Reply-To: <20200416161245.148813-1-samitolvanen@google.com> Message-Id: <20200416161245.148813-10-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20200416161245.148813-1-samitolvanen@google.com> X-Mailer: git-send-email 2.26.1.301.g55bc3eb7cb9-goog Subject: [PATCH v11 09/12] arm64: disable SCS for hypervisor code From: Sami Tolvanen To: Will Deacon , Catalin Marinas , James Morse , Steven Rostedt , Ard Biesheuvel , Mark Rutland , Masahiro Yamada , Michal Marek , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot Cc: Dave Martin , Kees Cook , Laura Abbott , Marc Zyngier , Masami Hiramatsu , Nick Desaulniers , Jann Horn , Miguel Ojeda , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Disable SCS for code that runs at a different exception level by adding __noscs to __hyp_text. Suggested-by: James Morse Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook Acked-by: Marc Zyngier --- arch/arm64/include/asm/kvm_hyp.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h index fe57f60f06a8..875b106c5d98 100644 --- a/arch/arm64/include/asm/kvm_hyp.h +++ b/arch/arm64/include/asm/kvm_hyp.h @@ -13,7 +13,7 @@ #include #include -#define __hyp_text __section(.hyp.text) notrace +#define __hyp_text __section(.hyp.text) notrace __noscs #define read_sysreg_elx(r,nvh,vh) \ ({ \ -- 2.26.1.301.g55bc3eb7cb9-goog