From patchwork Tue Sep 1 09:27:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amit Daniel Kachhap X-Patchwork-Id: 11747783 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BAC8B138A for ; Tue, 1 Sep 2020 09:27:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA05B2087D for ; Tue, 1 Sep 2020 09:27:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726112AbgIAJ1g (ORCPT ); Tue, 1 Sep 2020 05:27:36 -0400 Received: from foss.arm.com ([217.140.110.172]:39126 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726126AbgIAJ1f (ORCPT ); Tue, 1 Sep 2020 05:27:35 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9C8021045; Tue, 1 Sep 2020 02:27:34 -0700 (PDT) Received: from a077416.arm.com (unknown [10.57.6.112]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 071983F71F; Tue, 1 Sep 2020 02:27:31 -0700 (PDT) From: Amit Daniel Kachhap To: linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Shuah Khan , Catalin Marinas , Will Deacon , Vincenzo Frascino , Amit Daniel Kachhap Subject: [PATCH 0/6] kselftest: arm64/mte: Tests for user-space MTE Date: Tue, 1 Sep 2020 14:57:13 +0530 Message-Id: <20200901092719.9918-1-amit.kachhap@arm.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org These patch series adds below kselftests to test the user-space support for the ARMv8.5 Memory Tagging Extension present in arm64 tree [1]. 1) This test-case verifies that the memory allocated by kernel mmap interface can support tagged memory access. It first checks the presence of tags at address[56:59] and then proceeds with read and write. The pass criteria for this test is that tag fault exception should not happen. 2) This test-case crosses the valid memory to the invalid memory. In this memory area valid tags are not inserted so read and write should not pass. The pass criteria for this test is that tag fault exception should happen for all the illegal addresses. This test also verfies that PSTATE.TCO works properly. 3) This test-case verifies that the memory inherited by child process from parent process should have same tags copied. The pass criteria for this test is that tag fault exception should not happen. 4) This test checks different mmap flags with PROT_MTE memory protection. 5) This testcase checks that KSM should not merge pages containing different MTE tag values. However, if the tags are same then the pages may merge. This testcase uses the generic ksm sysfs interfaces to verify the MTE behaviour, so this testcase is not fullproof and may be impacted due to other load in the system. 6) Fifth test verifies that syscalls read/write etc works by considering that user pointer has valid/invalid allocation tags. To simplify the testing, a copy of the patchset on top of a recent linux tree can be found at [2]. Thanks, Amit Daniel [1]: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/mte [2]: http://linux-arm.org/git?p=linux-ak.git;a=shortlog;h=refs/heads/kselftest-mte-mainline-v1 Amit Daniel Kachhap (6): kselftest/arm64: Add utilities and a test to validate mte memory kselftest/arm64: Verify mte tag inclusion via prctl kselftest/arm64: Check forked child mte memory accessibility kselftest/arm64: Verify all different mmap MTE options kselftest/arm64: Verify KSM page merge for MTE pages kselftest/arm64: Check mte tagged user address in kernel tools/testing/selftests/arm64/Makefile | 2 +- tools/testing/selftests/arm64/mte/.gitignore | 6 + tools/testing/selftests/arm64/mte/Makefile | 29 ++ .../selftests/arm64/mte/check_buffer_fill.c | 476 ++++++++++++++++++ .../selftests/arm64/mte/check_child_memory.c | 195 +++++++ .../selftests/arm64/mte/check_ksm_options.c | 131 +++++ .../selftests/arm64/mte/check_mmap_options.c | 262 ++++++++++ .../arm64/mte/check_tags_inclusion.c | 183 +++++++ .../selftests/arm64/mte/check_user_mem.c | 118 +++++ .../selftests/arm64/mte/mte_common_util.c | 374 ++++++++++++++ .../selftests/arm64/mte/mte_common_util.h | 135 +++++ tools/testing/selftests/arm64/mte/mte_def.h | 26 + .../testing/selftests/arm64/mte/mte_helper.S | 116 +++++ 13 files changed, 2052 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/arm64/mte/.gitignore create mode 100644 tools/testing/selftests/arm64/mte/Makefile create mode 100644 tools/testing/selftests/arm64/mte/check_buffer_fill.c create mode 100644 tools/testing/selftests/arm64/mte/check_child_memory.c create mode 100644 tools/testing/selftests/arm64/mte/check_ksm_options.c create mode 100644 tools/testing/selftests/arm64/mte/check_mmap_options.c create mode 100644 tools/testing/selftests/arm64/mte/check_tags_inclusion.c create mode 100644 tools/testing/selftests/arm64/mte/check_user_mem.c create mode 100644 tools/testing/selftests/arm64/mte/mte_common_util.c create mode 100644 tools/testing/selftests/arm64/mte/mte_common_util.h create mode 100644 tools/testing/selftests/arm64/mte/mte_def.h create mode 100644 tools/testing/selftests/arm64/mte/mte_helper.S