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=-12.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 490D1C388F7 for ; Tue, 10 Nov 2020 22:12:12 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DB4FA20637 for ; Tue, 10 Nov 2020 22:12:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="HzxJDWjp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DB4FA20637 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 68F676B00AF; Tue, 10 Nov 2020 17:12:11 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 643F56B00B0; Tue, 10 Nov 2020 17:12:11 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 46A606B00B1; Tue, 10 Nov 2020 17:12:11 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0034.hostedemail.com [216.40.44.34]) by kanga.kvack.org (Postfix) with ESMTP id 14B7C6B00AF for ; Tue, 10 Nov 2020 17:12:11 -0500 (EST) Received: from smtpin06.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id B31981EF2 for ; Tue, 10 Nov 2020 22:12:10 +0000 (UTC) X-FDA: 77469907620.06.soup84_12006ff272f8 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin06.hostedemail.com (Postfix) with ESMTP id 92DE910045D19 for ; Tue, 10 Nov 2020 22:12:10 +0000 (UTC) X-HE-Tag: soup84_12006ff272f8 X-Filterd-Recvd-Size: 5162 Received: from mail-qv1-f73.google.com (mail-qv1-f73.google.com [209.85.219.73]) by imf33.hostedemail.com (Postfix) with ESMTP for ; Tue, 10 Nov 2020 22:12:09 +0000 (UTC) Received: by mail-qv1-f73.google.com with SMTP id s3so50974qve.13 for ; Tue, 10 Nov 2020 14:12:09 -0800 (PST) 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=d0luRNisG3KRkUWIJpA+kozZ7VZYZZ7aV9TEVeCXzwc=; b=HzxJDWjpBYBTx2nnzeaKR40IhBDGNp8//Q5g3+Yp8d8qaNxWMXc3C+4pVR31Fqn3xG fCKVwStNYBwd5N5fYGv0zlaIwWPFu+TBlPtIWMsEP6uSKlc0RDdsgWMDzgaDnld5lYPC hNvbDCdbNwFY5UNDA9qOkIQHMLKr+eaDpVgknzFtlhGsHay1WkNrzs5ZypWi9lsuJWKh omZpvEkEYE9CoCPW0+jFNFzoLp+kNp5DPHpUt7hzn9l3BjrggNZFNATTGFBlUXC3imBa tZo2pRjwpXd7khtzo/kg6/TokptyVi5r4cwYn2oxhHbLbXjTGtQZRkf62np7og6rShje jMCA== 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=d0luRNisG3KRkUWIJpA+kozZ7VZYZZ7aV9TEVeCXzwc=; b=qDESHWXnRCnGvMFOOFh5T9pYPPcSjBQgtWN712IH4mBnQ5HEiLg+X9C9M3sJEonAud NmU6EI2HyBhrSqptVLi+d1xzl9NDw5FzSQLm5Ha/lsWLYhzfSqlH2PrKH/7SDdI6ryGh Szi8iZnLynlAuQfXWKUCQeZZCX8pn96YGC+KhZnTAn9e90geSD8YV9f79ThkW+R8l1YF omQdFktSt9Tnpba9z6swv9duZwmqaY3Fv4rnikS3iEW0f3tWSNiPdkacBTtn6rPigDLZ 8xbjne4KWYQ9HiCHDjOKKWaLzh/ZCyatuEJuY6nmGwqjN6BvxfZFAyLwVJBSajSxEHqc wc8w== X-Gm-Message-State: AOAM530ssjuWV76qmC5XXApoOhIScCKaUVCn1MHYfmnpPeH4t1MrCHGJ x8MmzOiSNZnApdDP3Yu5MmEkRmNHIJwsaNXp X-Google-Smtp-Source: ABdhPJwpJeDUnREbb6gHaUPPYAcEUOobtengpR9kJKiWVhPyIavQao1BN6Cj2oA+Dzr1a/WdAfsYGMhCOnSInOLT X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:7220:84ff:fe09:7e9d]) (user=andreyknvl job=sendgmr) by 2002:a0c:90e4:: with SMTP id p91mr20380986qvp.61.1605046329251; Tue, 10 Nov 2020 14:12:09 -0800 (PST) Date: Tue, 10 Nov 2020 23:10:23 +0100 In-Reply-To: Message-Id: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.29.2.222.g5d2a92d10f8-goog Subject: [PATCH v9 26/44] arm64: Enable armv8.5-a asm-arch option From: Andrey Konovalov To: Catalin Marinas Cc: Will Deacon , Vincenzo Frascino , Dmitry Vyukov , Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Branislav Rankov , Kevin Brodsky , Andrew Morton , kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov Content-Type: text/plain; charset="UTF-8" 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: 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 25ead11074bf..c84a0e6b4650 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1591,6 +1591,9 @@ 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 @@ -1665,6 +1668,7 @@ 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 5789c2d18d43..50ad9cbccb51 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -100,6 +100,11 @@ 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)"' -- 2.29.2.222.g5d2a92d10f8-goog