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=-16.5 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,T_DKIMWL_WL_MED,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 D1224C04A6B for ; Mon, 6 May 2019 16:32:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9F60A20C01 for ; Mon, 6 May 2019 16:32:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="RgL6sD0q" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727459AbfEFQcD (ORCPT ); Mon, 6 May 2019 12:32:03 -0400 Received: from mail-ua1-f74.google.com ([209.85.222.74]:56307 "EHLO mail-ua1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727409AbfEFQcB (ORCPT ); Mon, 6 May 2019 12:32:01 -0400 Received: by mail-ua1-f74.google.com with SMTP id j14so236952ual.22 for ; Mon, 06 May 2019 09:32:00 -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=SWVsw2knEHBiqwTje+QZ95uhvJ0Eq8KQC+Uh3mHLIrs=; b=RgL6sD0qMVVBo2W6IqHUBM5jj9VtirOB0KEMhgfz8sMUxbZ1FQX2voyY3kT1G83YUB c2NHug1MaUbvaiT2/kwsYJcX1LID/13F0wNOf2AHICLEHy5XvFyjYislt0SYk+XJ6yKP 649zRPJ+NdSdXSoussFiI5QFPPYrqQUh3ojhtBNMt1d4e4tKjAnQkQjx5Eh1zuXQvQIM JcTGFQAzGxQj9nG+dHgIo2BfMYCnSXgaj1ghPhO7L6oN78p0fysyobcM96NyuviAQaqi YZLFqu1hahvJ559CgByQZZLzdRPUlocjvpj3Ingemtoy/aM5Di1UnW6jML/TVEYZ07jc pviA== 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=SWVsw2knEHBiqwTje+QZ95uhvJ0Eq8KQC+Uh3mHLIrs=; b=QVG4rU8DmBahYGwWAfZRNTcIjsDU8p+8spdnTGVmV/HvvVkHSfAoEwZCHTg+VYB6C9 N31LSOnLDBnnsauSocxuzf3RPfqg/CPGQYD2R1x8eCS5C7aicEo03/K7E+gU+uQ52lap 4wIdaU//igMXTImD6mcfDHruLvx/Xkb+R/8mfht8Az52yC6JT0wzjK3x2IH+MjCQfoaQ laGiA1Gau6bfXYPOkDKEnueC8VIzSlCQI+Vu1BFaOl+xM2XA0vWpW2mJbbXsekvbHUUh pjRFSPUo2qoiZz8q8qPUPHRhGNt8fc9Fwn6/hMwA4zhhJlrRAoOZhL24HQXWi13cW7l8 vgGQ== X-Gm-Message-State: APjAAAVVbz/yKuOXgkiH4xhYSa20zj/kD3juoD/bR1ay9pNiO3gxu2mn 1xy3JdfsVU6ocxXN5Q7GOZewhaxRirCL2iBr X-Google-Smtp-Source: APXvYqzqHfit8S9j9GkAK338RCzBXfh/l/pOO+ozkZWr4c4UHEKzTSoAg+io9ZiclURMXMIijYhqt5pgUoOVGv8c X-Received: by 2002:a67:f6c4:: with SMTP id v4mr13696595vso.182.1557160319808; Mon, 06 May 2019 09:31:59 -0700 (PDT) Date: Mon, 6 May 2019 18:31:03 +0200 In-Reply-To: Message-Id: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog Subject: [PATCH v15 17/17] selftests, arm64: add a selftest for passing tagged pointers to kernel From: Andrey Konovalov To: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Catalin Marinas , Vincenzo Frascino , Will Deacon , Mark Rutland , Andrew Morton , Greg Kroah-Hartman , Kees Cook , Yishai Hadas , Felix Kuehling , Alexander Deucher , Christian Koenig , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , Leon Romanovsky , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov 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 This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. This patch adds a simple test, that calls the uname syscall with a tagged user pointer as an argument. Without the kernel accepting tagged user pointers the test fails with EFAULT. Signed-off-by: Andrey Konovalov --- tools/testing/selftests/arm64/.gitignore | 1 + tools/testing/selftests/arm64/Makefile | 11 ++++++++++ .../testing/selftests/arm64/run_tags_test.sh | 12 +++++++++++ tools/testing/selftests/arm64/tags_test.c | 21 +++++++++++++++++++ 4 files changed, 45 insertions(+) create mode 100644 tools/testing/selftests/arm64/.gitignore create mode 100644 tools/testing/selftests/arm64/Makefile create mode 100755 tools/testing/selftests/arm64/run_tags_test.sh create mode 100644 tools/testing/selftests/arm64/tags_test.c diff --git a/tools/testing/selftests/arm64/.gitignore b/tools/testing/selftests/arm64/.gitignore new file mode 100644 index 000000000000..e8fae8d61ed6 --- /dev/null +++ b/tools/testing/selftests/arm64/.gitignore @@ -0,0 +1 @@ +tags_test diff --git a/tools/testing/selftests/arm64/Makefile b/tools/testing/selftests/arm64/Makefile new file mode 100644 index 000000000000..a61b2e743e99 --- /dev/null +++ b/tools/testing/selftests/arm64/Makefile @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0 + +# ARCH can be overridden by the user for cross compiling +ARCH ?= $(shell uname -m 2>/dev/null || echo not) + +ifneq (,$(filter $(ARCH),aarch64 arm64)) +TEST_GEN_PROGS := tags_test +TEST_PROGS := run_tags_test.sh +endif + +include ../lib.mk diff --git a/tools/testing/selftests/arm64/run_tags_test.sh b/tools/testing/selftests/arm64/run_tags_test.sh new file mode 100755 index 000000000000..745f11379930 --- /dev/null +++ b/tools/testing/selftests/arm64/run_tags_test.sh @@ -0,0 +1,12 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +echo "--------------------" +echo "running tags test" +echo "--------------------" +./tags_test +if [ $? -ne 0 ]; then + echo "[FAIL]" +else + echo "[PASS]" +fi diff --git a/tools/testing/selftests/arm64/tags_test.c b/tools/testing/selftests/arm64/tags_test.c new file mode 100644 index 000000000000..2bd1830a7ebe --- /dev/null +++ b/tools/testing/selftests/arm64/tags_test.c @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include +#include + +#define SHIFT_TAG(tag) ((uint64_t)(tag) << 56) +#define SET_TAG(ptr, tag) (((uint64_t)(ptr) & ~SHIFT_TAG(0xff)) | \ + SHIFT_TAG(tag)) + +int main(void) +{ + struct utsname *ptr = (struct utsname *)malloc(sizeof(*ptr)); + void *tagged_ptr = (void *)SET_TAG(ptr, 0x42); + int err = uname(tagged_ptr); + + free(ptr); + return err; +} -- 2.21.0.1020.gf2820cf01a-goog