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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0A21C433EF for ; Fri, 26 Nov 2021 07:51:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353381AbhKZHyr (ORCPT ); Fri, 26 Nov 2021 02:54:47 -0500 Received: from szxga02-in.huawei.com ([45.249.212.188]:27299 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344718AbhKZHwn (ORCPT ); Fri, 26 Nov 2021 02:52:43 -0500 Received: from dggpemm500023.china.huawei.com (unknown [172.30.72.57]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4J0n2G2XNVzbj6t; Fri, 26 Nov 2021 15:49:26 +0800 (CST) Received: from dggpemm500001.china.huawei.com (7.185.36.107) by dggpemm500023.china.huawei.com (7.185.36.83) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Fri, 26 Nov 2021 15:49:04 +0800 Received: from localhost.localdomain.localdomain (10.175.113.25) by dggpemm500001.china.huawei.com (7.185.36.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Fri, 26 Nov 2021 15:49:04 +0800 From: Kefeng Wang To: Marco Elver , Catalin Marinas , Will Deacon , , CC: Kefeng Wang Subject: [PATCH] arm64: Enable KCSAN Date: Fri, 26 Nov 2021 16:00:08 +0800 Message-ID: <20211126080008.77202-1-wangkefeng.wang@huawei.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.113.25] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpemm500001.china.huawei.com (7.185.36.107) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch enables KCSAN for arm64, with updates to build rules to not use KCSAN for several incompatible compilation units. Tested selftest and kcsan_test, and all passed. Signed-off-by: Kefeng Wang --- Tested on Qemu with clang 13, based on 5.16-rc2. [ 0.221518] kcsan: enabled early [ 0.222422] kcsan: strict mode configured ... [ 5.839223] kcsan: selftest: 3/3 tests passed ... [ 517.895102] # kcsan: pass:24 fail:0 skip:0 total:24 [ 517.896393] # Totals: pass:168 fail:0 skip:0 total:168 [ 517.897502] ok 1 - kcsan arch/arm64/Kconfig | 1 + arch/arm64/kernel/vdso/Makefile | 1 + arch/arm64/kvm/hyp/nvhe/Makefile | 1 + 3 files changed, 3 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 4ff73299f8a9..0ac90875f71d 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -150,6 +150,7 @@ config ARM64 select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN select HAVE_ARCH_KASAN_SW_TAGS if HAVE_ARCH_KASAN select HAVE_ARCH_KASAN_HW_TAGS if (HAVE_ARCH_KASAN && ARM64_MTE) + select HAVE_ARCH_KCSAN select HAVE_ARCH_KFENCE select HAVE_ARCH_KGDB select HAVE_ARCH_MMAP_RND_BITS diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index 700767dfd221..60813497a381 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -32,6 +32,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS) $(GCC_PLUGINS_CFLAGS) \ $(CC_FLAGS_LTO) KASAN_SANITIZE := n +KCSAN_SANITIZE := n UBSAN_SANITIZE := n OBJECT_FILES_NON_STANDARD := y KCOV_INSTRUMENT := n diff --git a/arch/arm64/kvm/hyp/nvhe/Makefile b/arch/arm64/kvm/hyp/nvhe/Makefile index c3c11974fa3b..24b2c2425b38 100644 --- a/arch/arm64/kvm/hyp/nvhe/Makefile +++ b/arch/arm64/kvm/hyp/nvhe/Makefile @@ -89,6 +89,7 @@ KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) $(CC_FLAGS_CFI) # cause crashes. Just disable it. GCOV_PROFILE := n KASAN_SANITIZE := n +KCSAN_SANITIZE := n UBSAN_SANITIZE := n KCOV_INSTRUMENT := n -- 2.26.2