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=-20.4 required=3.0 tests=BAYES_00,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, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 34A8EC4363A for ; Mon, 12 Oct 2020 20:45:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DDE7A208D5 for ; Mon, 12 Oct 2020 20:45:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="VScTU+0p" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730786AbgJLUo7 (ORCPT ); Mon, 12 Oct 2020 16:44:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40614 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387772AbgJLUo5 (ORCPT ); Mon, 12 Oct 2020 16:44:57 -0400 Received: from mail-wr1-x449.google.com (mail-wr1-x449.google.com [IPv6:2a00:1450:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1913CC0613D0 for ; Mon, 12 Oct 2020 13:44:57 -0700 (PDT) Received: by mail-wr1-x449.google.com with SMTP id 2so659188wrd.14 for ; Mon, 12 Oct 2020 13:44:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=DmclJkDR4Qm5lsb7ydlGYlEQZpzVsyh6HqffasVR3Wo=; b=VScTU+0p8eF/zz4mZQVMYdWWD2El/y9UVrnM21faQoYYGMWFZ2VUSWXIU0vkGt3PlD TvkWt//RfWPWv8xCXw2oZRawVUo60eqAx7JfH5k9aF2IUQ+E6pAcK7ip5SdfkUUa9x/z seWvaJPM588rFpLRJnEvw0/SeNL+kEmNvwsyA6hTP0vvnsGrXOF+Ohas26Wc47NS9aT1 bTRCoZMNCMV/C5Kz/4QQX8UnEIha6lWveun9Dm74BwLONEIlKC1PC3WnipGQroJ5A6Wj cumAdmN4RHm/2sLnehMU5qVMP8/rxAAU6pXJa/YgRIWk609bVyaxCpv0QfUpwRsktlLY 1mGQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=DmclJkDR4Qm5lsb7ydlGYlEQZpzVsyh6HqffasVR3Wo=; b=UC1K9bhbEquCxLJKyLhJsuUVulGx3HeskSZy2zldaTco36cdk2EasV80hyaS1dAKCE 3xhio9mH/eX+6NUHYhzYvlgK/HpJQWN0+gmLTjkvAjcbRwxW2f+Q97PdDK/haEMe8IqO e0EGNmeASGvZhKnO1mECzHrpdScv1pPDF46Qz0TUYa2NUACIlBVMSFAXSmq0XIDAA0th 8Q4lLLa3jepCs5+frUozqzrde4cSVO2f9G0UaAYiEeBEn9X1eZkEMsf57dtYI4fDQLQs YS3ecZb68ebqn7VjsSCcPbzUBrpA0rrJuynThbNi/dsFCX412K8kCk5wLGBVSkiknqrU 59sg== X-Gm-Message-State: AOAM532vs0TyfZxqPAzR73CBclNt5RIxjlQQe1wdnkbxFTRR5Blf66Un xKm6+VKdhGmkhLxIHE+k/LSvCWaIfj/s8SVr X-Google-Smtp-Source: ABdhPJyZct8Pt2l8Kp955U1QPIzytEc6BVLp0niDriGROF+h982d73KRu4GChhMiIEs9RcvNcCgK5kUILF6ICAUS Sender: "andreyknvl via sendgmr" X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:7220:84ff:fe09:7e9d]) (user=andreyknvl job=sendgmr) by 2002:a5d:5344:: with SMTP id t4mr12260918wrv.267.1602535495668; Mon, 12 Oct 2020 13:44:55 -0700 (PDT) Date: Mon, 12 Oct 2020 22:44:07 +0200 In-Reply-To: Message-Id: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.28.0.1011.ga647a8990f-goog Subject: [PATCH v5 01/40] arm64: Enable armv8.5-a asm-arch option From: Andrey Konovalov To: Catalin Marinas , Will Deacon Cc: Vincenzo Frascino , kasan-dev@googlegroups.com, Dmitry Vyukov , Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Elena Petrova , Branislav Rankov , Kevin Brodsky , Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vincenzo Frascino Hardware tag-based KASAN relies on Memory Tagging Extension (MTE) which is an armv8.5-a architecture extension. Enable the correct asm option when the compiler supports it in order to allow the usage of ALTERNATIVE()s with MTE instructions. Signed-off-by: Vincenzo Frascino Signed-off-by: Andrey Konovalov Reviewed-by: Catalin Marinas --- Change-Id: I172e15e4c189f073e4c14a10276b276092e76536 --- arch/arm64/Kconfig | 4 ++++ arch/arm64/Makefile | 5 +++++ 2 files changed, 9 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index e7450fbd0aa7..f27297ac70bf 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1600,6 +1600,9 @@ endmenu menu "ARMv8.5 architectural features" +config AS_HAS_ARMV8_5 + def_bool $(cc-option,-Wa$(comma)-march=armv8.5-a) + config ARM64_BTI bool "Branch Target Identification support" default y @@ -1676,6 +1679,7 @@ config ARM64_MTE bool "Memory Tagging Extension support" default y depends on ARM64_AS_HAS_MTE && ARM64_TAGGED_ADDR_ABI + depends on AS_HAS_ARMV8_5 select ARCH_USES_HIGH_VMA_FLAGS help Memory Tagging (part of the ARMv8.5 Extensions) provides diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index 130569f90c54..afcd61f7d2b0 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -94,6 +94,11 @@ ifeq ($(CONFIG_AS_HAS_ARMV8_4), y) asm-arch := armv8.4-a endif +ifeq ($(CONFIG_AS_HAS_ARMV8_5), y) +# make sure to pass the newest target architecture to -march. +asm-arch := armv8.5-a +endif + ifdef asm-arch KBUILD_CFLAGS += -Wa,-march=$(asm-arch) \ -DARM64_ASM_ARCH='"$(asm-arch)"' -- 2.28.0.1011.ga647a8990f-goog