From patchwork Wed Mar 20 14:51:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10863065 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3EA946C2 for ; Thu, 21 Mar 2019 08:24:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 252071FE8B for ; Thu, 21 Mar 2019 08:24:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 184A7283EE; Thu, 21 Mar 2019 08:24:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id DD9AA28AD3 for ; Thu, 21 Mar 2019 08:24:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DAB1489E7C; Thu, 21 Mar 2019 08:23:41 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pf1-x44a.google.com (mail-pf1-x44a.google.com [IPv6:2607:f8b0:4864:20::44a]) by gabe.freedesktop.org (Postfix) with ESMTPS id 87C1489F63 for ; Wed, 20 Mar 2019 14:52:50 +0000 (UTC) Received: by mail-pf1-x44a.google.com with SMTP id c15so2754908pfn.11 for ; Wed, 20 Mar 2019 07:52:50 -0700 (PDT) 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=SY+rnApq6/oVhWiUcTCOnBf6TcIl5V0rPtZOMhbp5Gs=; b=esViYCR43i8NhgwmdVDBS4ntpjs0d68HmJJa5l+6GTtGpo0FBVAi6m0bcEugKylk6t 7wa6cGqxZ1COEarCYAcGyTH7PyJGfMqC0vP2FgQpMEHu2G6cPcx92ObNkvQtRGONKnNk ch9NqACOESv0KjTZSDMG3ES54zwfbpC3ZCof6U3nAzKZjDlKwxn6imGXDTjywkvfQoEm HDsJMeo2oYMMiX6joq2Wv0Nx/8AtkSbbwxA4wrjIdwTeYB8ohID4b447eCKhG4a88lbi BFVLQ/A2/y1EZUXDXd1XGIR20VcuzAIk2seU8P61EbFpxKG7nWYtBK6jg/QjB3nM35N3 v01A== X-Gm-Message-State: APjAAAWBQv0iLb4RuE7DC0aRhlONwayCR/cIFueyAAM2huULVCCFfP6f v7klsT7Pbxwj9YRfBI418VijeR8CPq93wRic X-Google-Smtp-Source: APXvYqz6JBh3VPqVViw3H16uoW27hFqlC/o1l863wBn8e7Vx/uAhxhmqW+NafnSe+CxZM3eW2zA7LqhlL1qr07K2 X-Received: by 2002:a63:5117:: with SMTP id f23mr5792228pgb.3.1553093569898; Wed, 20 Mar 2019 07:52:49 -0700 (PDT) Date: Wed, 20 Mar 2019 15:51:34 +0100 In-Reply-To: Message-Id: <60757dd548eefd5cda129c73486dfac5e838084a.1553093421.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.225.g810b269d1ac-goog Subject: [PATCH v13 20/20] selftests, arm64: add a selftest for passing tagged pointers to kernel From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , Kees Cook , Kate Stewart , Greg Kroah-Hartman , Andrew Morton , Ingo Molnar , "Kirill A . Shutemov" , Shuah Khan , Vincenzo Frascino , Eric Dumazet , "David S. Miller" , Alexei Starovoitov , Daniel Borkmann , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , Alex Deucher , " =?utf-8?q?Christian_K=C3=B6ni?= =?utf-8?q?g?= " , "David (ChunMing) Zhou" , Yishai Hadas , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@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, linux-kernel@vger.kernel.org X-Mailman-Approved-At: Thu, 21 Mar 2019 08:23:39 +0000 X-Mailman-Original-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=SY+rnApq6/oVhWiUcTCOnBf6TcIl5V0rPtZOMhbp5Gs=; b=qoeAL/PTMnTmhgXnl3RGCTw81JMF7TMbNpbYC6F1pr3TGPdCwVaIeU85uj/B77baMA VAfUOVehMewxrlPBnMcvR10msEYwYWF8Hf58msk5Kne+FBqRyuY30tbXpt8IkSkZrha9 BopC5S+Fs8co9IFKm2kvowWttr/p77PwwjO1CLveVN2yF4PwY74t43GhYeQZYNqL2hkb Lb66rbH+aemh2G4/5BTzrD1WRMcmhL2lokvByiGUsVSSzbRXBf7wNtl5qMTt1G6arf7d 2SGd6xj3du+G5dFYrDQjaku3ogveIBZkyDoiC7RnaR7D3ZV5QwX7GQmkBx2mnQVW5OQ5 WLOg== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Brodsky , Chintan Pandya , Jacob Bramley , Ruben Ayrapetyan , Szabolcs Nagy , Andrey Konovalov , Lee Smith , Kostya Serebryany , Dmitry Vyukov , Ramana Radhakrishnan , Luc Van Oostenryck , Dave Martin , Evgeniy Stepanov Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP 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; +}