From patchwork Fri Apr 5 08:44:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dev Jain X-Patchwork-Id: 13618691 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 853E3145B15; Fri, 5 Apr 2024 08:49:46 +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=1712306988; cv=none; b=XFDUpOfcsYdpxywIUzvMXdvBrtfrrQv4+hgPQPDU/gyKwrL6vtQ0OUqQ5VehXxFH6O+AFvz8VwC1xMtXWQKkrcX8mKBFsVKdWHxnO+eSXJOjbAB0UOITmuLJrx8dvve3zMzbdCC5zeAyw3Bzw6y9jHuVin08JHhrimauxNm41bY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712306988; c=relaxed/simple; bh=vcqVHlwn7VRmRqz58IVnuSiGZzLv3I+cL/EHCDTSX7g=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=bHYQ1huMTQu6McY2nziuJQFLzSdb7WXu7bl6SqFj+bpjuesxZ5Ri1hJlRlfqOLuXuIO9mtKJ9hvyOo7njb2yMnlJRUmUFV/2vzscnEDGi9AOY61l8SexXc4Fowg8VZ2eRX/+mCmqZlKeWWV2sRa/YNE0LKYk/0tHJD/d/0M+o/g= 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 5817BFEC; Fri, 5 Apr 2024 01:50:16 -0700 (PDT) Received: from e116581.blr.arm.com (e116581.arm.com [10.162.43.7]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 34A6F3F64C; Fri, 5 Apr 2024 01:49:40 -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, Dev Jain Subject: [PATCH 0/4] A new selftests/ directory for arm compatibility testing Date: Fri, 5 Apr 2024 14:14:06 +0530 Message-Id: <20240405084410.256788-1-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 6.9.0-rc2, on Aarch64 platform. Testing remains to be done on Aaarch32. 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/elf/Makefile | 6 + tools/testing/selftests/arm/elf/parse_elf.c | 75 +++++ tools/testing/selftests/arm/mm/Makefile | 6 + tools/testing/selftests/arm/mm/compat_va.c | 94 +++++++ 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 ++ 14 files changed, 848 insertions(+) create mode 100644 tools/testing/selftests/arm/Makefile create mode 100644 tools/testing/selftests/arm/README 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/Makefile create mode 100644 tools/testing/selftests/arm/mm/compat_va.c 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