From patchwork Thu Jul 29 15:15:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 12408941 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18195C4338F for ; Thu, 29 Jul 2021 15:17:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EB49160F48 for ; Thu, 29 Jul 2021 15:17:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237212AbhG2PRm (ORCPT ); Thu, 29 Jul 2021 11:17:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:33778 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229864AbhG2PRm (ORCPT ); Thu, 29 Jul 2021 11:17:42 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 4CF4760F23; Thu, 29 Jul 2021 15:17:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1627571858; bh=PL8vnhHrPx6WNSFPgJipiTrV5cz4ofT9TlJsPYljmiw=; h=From:To:Cc:Subject:Date:From; b=TZbZm4wf7DH4abusehxZJbx3Dw22jebxp3WWnolDI6NIZw8U0yFVDd6Z6cBQwxtrK UrLoy8amOJZP8dwK2OlARXZ6HJc/DZ2u21O+BaGaj3gK+7TT+B4wnoP4bKgymCl/Yo hkuz3mZqQ59GDfYfBwttbbFp6aKcIgSsKABscOjEE4iXVTm83zGaoMDBtO4NMJUOfB vOEteizcfZRsgnKmAZQrA/4UCLZQeY09nzdGXV9WT7l4nAmA3JmHnnvf6lJt4PY/fa 9vzLBFmGVF83474Tp8hxLeseqM0o6v4zzAV5sTKogjA4XAtI+v6UYGOCyEvH52EUZk 5Cl9KqfQq6cJA== From: Mark Brown To: Catalin Marinas , Will Deacon , Shuah Khan Cc: Dave Martin , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, Mark Brown Subject: [PATCH v3 0/4] kselftest/arm64: Vector length configuration tests Date: Thu, 29 Jul 2021 16:15:14 +0100 Message-Id: <20210729151518.46388-1-broonie@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3010; h=from:subject; bh=PL8vnhHrPx6WNSFPgJipiTrV5cz4ofT9TlJsPYljmiw=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBhAsX72RqCtKvAZYQIAdFZX7IXpXKqBlIv1rq0Z6lf F/1dUYCJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCYQLF+wAKCRAk1otyXVSH0DjHB/ 47mtmXDGlVEA0oRazEBVGNra0evz6jdQ8YQnLP7ktEkGsiDYQ1huae1EB6+WKxCH9y1VHxIaY7JsXO LgM/PDkzR/2Pf9BtbIsalTvrkOw9/X3BMZvWEPG29R04l1xgtG2REgyTN9lECCJ0B4dCFtp3hru0cT 1j/0y53XU9DXZ0BnE9djEFsQ6ML0FFwZdLh2R9MmBnGCS4zQmIWxq/vxO5tqHTML0lb/YxJQ6+1ZOn ptR6uma8QwDtHTzx3GeaMMU69TBoLJZr5SBVMfszJHTq7B0G3fs6OJkmia3K+5GJ52AoqRhkRk58bu YO9A40KeNRJfGwLbH2frAxsdV673yZ X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Currently we don't have full automated tests for the vector length configuation ABIs offered for SVE, we have a helper binary for setting the vector length which can be used for manual tests and we use the prctl() interface to enumerate the vector lengths but don't actually verify that the vector lengths enumerated were set. This patch series provides a small helper which allows us to get the currently configured vector length using the RDVL instruction via either a library call or stdout of a process and then uses this to both add verification of enumerated vector lengths to our existing tests and also add a new test program which exercises both the prctl() and sysfs interfaces. In preparation for the forthcomng support for the Scalable Matrix Extension (SME) [1] which introduces a new vector length managed via a very similar hardware interface the helper and new test program are parameterised with the goal of allowing reuse for SME. [1] https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/scalable-matrix-extension-armv9-a-architecture v3: - Add BTI landing pads to the asm helper functions. - Clean up pipes used to talk to children. - Remove another unneeded include. - Make functions in the main executable static. - Match the newline when parsing vector length from the child. - Factor out the fscanf() and fclose() from parsing integers from file descriptors. - getauxval() returns unsigned long. v2: - Tweak log message on failure in sve-probe-vls. - Stylistic changes in vec-syscfg. - Flush stdout before forking in vec-syscfg. - Use EXIT_FAILURE. - Use fdopen() to get child output. - Replace a bunch of UNIX API usage with stdio. - Add a TODO list. - Verify that we're root before testing writes to /proc. Mark Brown (4): kselftest/arm64: Provide a helper binary and "library" for SVE RDVL kselftest/arm64: Validate vector lengths are set in sve-probe-vls kselftest/arm64: Add tests for SVE vector configuration kselftest/arm64: Add a TODO list for floating point tests tools/testing/selftests/arm64/fp/.gitignore | 2 + tools/testing/selftests/arm64/fp/Makefile | 11 +- tools/testing/selftests/arm64/fp/TODO | 3 + tools/testing/selftests/arm64/fp/rdvl-sve.c | 14 + tools/testing/selftests/arm64/fp/rdvl.S | 10 + tools/testing/selftests/arm64/fp/rdvl.h | 8 + .../selftests/arm64/fp/sve-probe-vls.c | 5 + tools/testing/selftests/arm64/fp/vec-syscfg.c | 594 ++++++++++++++++++ 8 files changed, 644 insertions(+), 3 deletions(-) create mode 100644 tools/testing/selftests/arm64/fp/TODO create mode 100644 tools/testing/selftests/arm64/fp/rdvl-sve.c create mode 100644 tools/testing/selftests/arm64/fp/rdvl.S create mode 100644 tools/testing/selftests/arm64/fp/rdvl.h create mode 100644 tools/testing/selftests/arm64/fp/vec-syscfg.c base-commit: ff1176468d368232b684f75e82563369208bc371