From patchwork Mon Apr 22 07:07:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dev Jain X-Patchwork-Id: 791072 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 3AF5048787; Mon, 22 Apr 2024 07:08:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713769732; cv=none; b=Qdmx8XExlr72QMH5qtg/u/JAEgIjTbukkdMX4lCVqjXd8ARzk4+lch0wSDDMalNUv57VhUARbD3tId5+X2L1tbXDoZEH5scKngpA/pf3+JviJ2kbNLrKR3s48BI4cvpWyQ+FA48Lfm7bXWo+BpUux79jwfHhd028VoM4FcJASzQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713769732; c=relaxed/simple; bh=mOE8EdBV6YspiQJow9uP5iTbIrLKoWnuomt0yvOUewY=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=gjIDv+mCIFYqo5cEataHfq1+cTpZfwu0JuyfUsRVktJR/oqIUd1omPgM6EdSygCn8hz4AwiGkFsw6p9NfxPOdiIh0ZNMxaTe2jUrDOVlk0/+DcGU9YkPuqBGHjsRau8A/6UK8FqhUf9iNyrft3Lv+jTiSLSuqloiHxpiRLuPJ+k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com 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 AA92C339; Mon, 22 Apr 2024 00:09:13 -0700 (PDT) Received: from e116581.blr.arm.com (e116581.arm.com [10.162.41.8]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C55AA3F7BD; Mon, 22 Apr 2024 00:08:40 -0700 (PDT) From: Dev Jain To: shuah@kernel.org, linux-arm-kernel@lists.infradead.org Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Anshuman.Khandual@arm.com, suzuki.poulose@arm.com, ryan.roberts@arm.com, rob.herring@arm.com, Catalin.Marinas@arm.com, broonie@kernel.org, will@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk, Dev Jain Subject: [PATCH v2 0/4] A new selftests/ directory for arm compatibility testing Date: Mon, 22 Apr 2024 12:37:13 +0530 Message-Id: <20240422070717.2194201-1-dev.jain@arm.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This series introduces the selftests/arm directory, which tests 32 and 64-bit kernel compatibility with 32-bit ELFs running on the Aarch platform. The need for this bucket of tests is that 32 bit applications built on legacy ARM architecture must not break on the new Aarch64 platforms and the 64-bit kernel. The kernel must emulate the data structures, system calls and the registers according to Aarch32, when running a 32-bit process; this directory fills that testing requirement. One may find similarity between this directory and selftests/arm64; it is advisable to refer to that since a lot has been copied from there itself. The mm directory includes a test for checking 4GB limit of the virtual address space of a process. The signal directory contains two tests, following a common theme: mangle with arm_cpsr, dumped by the kernel to user space while invoking the signal handler; kernel must spot this illegal attempt and terminate the program by SEGV. The elf directory includes a test for checking the 32-bit status of the ELF. The series has been tested on 6.9-rc5, on Aarch64 platform. Testing remains to be done on Aaarch32. Changes in v2: - Formatting changes - Add .gitignore files and config file Dev Jain (4): selftests/arm: Add mm test selftests/arm: Add signal tests selftests/arm: Add elf test selftests: Add build infrastructure along with README tools/testing/selftests/Makefile | 1 + tools/testing/selftests/arm/Makefile | 57 ++++ tools/testing/selftests/arm/README | 31 +++ tools/testing/selftests/arm/config | 1 + tools/testing/selftests/arm/elf/.gitignore | 2 + tools/testing/selftests/arm/elf/Makefile | 6 + tools/testing/selftests/arm/elf/parse_elf.c | 74 +++++ tools/testing/selftests/arm/mm/.gitignore | 2 + tools/testing/selftests/arm/mm/Makefile | 6 + tools/testing/selftests/arm/mm/compat_va.c | 92 +++++++ tools/testing/selftests/arm/signal/.gitignore | 3 + tools/testing/selftests/arm/signal/Makefile | 30 ++ .../selftests/arm/signal/test_signals.c | 27 ++ .../selftests/arm/signal/test_signals.h | 74 +++++ .../selftests/arm/signal/test_signals_utils.c | 257 ++++++++++++++++++ .../selftests/arm/signal/test_signals_utils.h | 128 +++++++++ .../signal/testcases/mangle_cpsr_aif_bits.c | 33 +++ .../mangle_cpsr_invalid_compat_toggle.c | 29 ++ 18 files changed, 853 insertions(+) create mode 100644 tools/testing/selftests/arm/Makefile create mode 100644 tools/testing/selftests/arm/README create mode 100644 tools/testing/selftests/arm/config create mode 100644 tools/testing/selftests/arm/elf/.gitignore create mode 100644 tools/testing/selftests/arm/elf/Makefile create mode 100644 tools/testing/selftests/arm/elf/parse_elf.c create mode 100644 tools/testing/selftests/arm/mm/.gitignore create mode 100644 tools/testing/selftests/arm/mm/Makefile create mode 100644 tools/testing/selftests/arm/mm/compat_va.c create mode 100644 tools/testing/selftests/arm/signal/.gitignore create mode 100644 tools/testing/selftests/arm/signal/Makefile create mode 100644 tools/testing/selftests/arm/signal/test_signals.c create mode 100644 tools/testing/selftests/arm/signal/test_signals.h create mode 100644 tools/testing/selftests/arm/signal/test_signals_utils.c create mode 100644 tools/testing/selftests/arm/signal/test_signals_utils.h create mode 100644 tools/testing/selftests/arm/signal/testcases/mangle_cpsr_aif_bits.c create mode 100644 tools/testing/selftests/arm/signal/testcases/mangle_cpsr_invalid_compat_toggle.c