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Sat, 17 Oct 2026 11:25:16 -0700 (PDT) Received: from localhost.localdomain ([2001:56a:78dc:9300:8846:761:63e4:6d67]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3acc46ecd32sm9241586a91.3.2026.10.17.11.25.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 17 Oct 2026 11:25:16 -0700 (PDT) From: Abdalla Eldoumani To: Catalin Marinas , Will Deacon , Shuah Khan Cc: Mark Brown , Mark Rutland , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Abdalla Eldoumani Subject: [PATCH 0/2] kselftest/arm64: vec-syscfg exit status and VL inheritance coverage Date: Sat, 17 Oct 2026 12:24:52 -0600 Message-ID: <20261017182455.1884-1-aamsdoumani@gmail.com> X-Mailer: git-send-email 2.49.0.windows.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261017_112518_219017_2C78CB8F X-CRM114-Status: GOOD ( 10.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Abdalla Eldoumani Two small changes to the vector length configuration test. The first makes vec-syscfg report failures through its exit status. It currently always exits 0, so a kernel that fails its checks still shows as passing in the kselftest runner. The second implements the "Test PR_SVE_VL_INHERIT after a double fork" item from the fp TODO list by also checking the VL in a grandchild, two fork() and exec() generations down. Tested under QEMU (-cpu max, -cpu max,sme=off and -cpu cortex-a57) on mainline (58161ead2, after v7.3-rc7). To check that the new test can fail, it was also run on a kernel modified to clear the inherit flag on exec(): the existing check passed, the new check failed for SVE and SME, and vec-syscfg exited 1. Assisted-by: LLM Abdalla Eldoumani (2): kselftest/arm64: Report test failures in vec-syscfg's exit status kselftest/arm64: Check that PR_SVE_VL_INHERIT survives a second exec tools/testing/selftests/arm64/fp/TODO | 1 - tools/testing/selftests/arm64/fp/vec-syscfg.c | 64 +++++++++++++++++-- 2 files changed, 60 insertions(+), 5 deletions(-) base-commit: 58161ead29e50d70a317ea26b472e0c7508e69da -- 2.49.0.windows.1