From patchwork Mon May 6 16:31:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10931447 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 8866F14DB for ; Mon, 6 May 2019 16:32:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 76666287EF for ; Mon, 6 May 2019 16:32:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 69D3928848; Mon, 6 May 2019 16:32:07 +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=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E3E91287EF for ; Mon, 6 May 2019 16:32:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727372AbfEFQcC (ORCPT ); Mon, 6 May 2019 12:32:02 -0400 Received: from mail-ua1-f74.google.com ([209.85.222.74]:32797 "EHLO mail-ua1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727432AbfEFQcB (ORCPT ); Mon, 6 May 2019 12:32:01 -0400 Received: by mail-ua1-f74.google.com with SMTP id h6so1555355uab.0 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=AZSrQcNRfkaFGnpi/8HSgSzVu0R+mTYgRRa0ik/pkYKRBQkyT/F1vRhmSU/jMPVOWQ RDjp65dNde+KN4tRBcknSwlDE7X9RhRgMN01sPAsnBJ2zhPV6L7G3/lVp47C3G2taNSE SjQ87+RrajuzyqHJvR0vgabweMNNiwKdzGZtkbbx8rRHNIHyzQeZh37UN6VfkoqZtX1S yTT94kFDwLkjgZH/xbeNiWHwQpaRu+GIqL+wFgCLTucHvabqthK+HUBtWwbInBtHkhZP yWqRzGwiFpR/ygB6ln3VXVdm/oHLvpnotmqli1ZOygr0sKOJ0fZn1EdizyDZfPznF847 y07w== X-Gm-Message-State: APjAAAWKwBgVDox4oCfIVh9noDrAG6sUX0TQcl3e++gAd9+6ANDniGFM 184zwm9PhfLWjI1MEkrcDuwNdBH2RSL/jBIp 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 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org 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; +}