Re: [PATCH 4/4] selftest/arm64: Add MTE test config fragment
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From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2026-08-21 08:56:05
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On Thu, Aug 20, 2026 at 04:33:26PM +0100, Muhammad Usama Anjum wrote:
quoted hunk ↗ jump to hunk
The arm64 selftest collection has no Kconfig fragment, so kernels built with the selftest requirements are not guaranteed to provide the support used by the MTE tests. Add a fragment covering the userspace MTE and tagged-address ABIs, KSM and its sysfs interface, explicit HugeTLB mappings and their proc/sysctl interfaces, and tmpfs-backed file mappings. Do not request NUMA solely for the optional KSM merge_across_nodes. Signed-off-by: Muhammad Usama Anjum <redacted> --- tools/testing/selftests/arm64/mte/config | 8 ++++++++ 1 file changed, 8 insertions(+) create mode 100644 tools/testing/selftests/arm64/mte/configdiff --git a/tools/testing/selftests/arm64/mte/config b/tools/testing/selftests/arm64/mte/config new file mode 100644 index 0000000000000..8587ce70c294a --- /dev/null +++ b/tools/testing/selftests/arm64/mte/config@@ -0,0 +1,8 @@ +CONFIG_ARM64_MTE=y +CONFIG_ARM64_TAGGED_ADDR_ABI=y +CONFIG_HUGETLBFS=y +CONFIG_KSM=y +CONFIG_PROC_FS=y +CONFIG_SYSCTL=y
You may want CONFIG_PROC_SYSCTL.
+CONFIG_SYSFS=y +CONFIG_TMPFS=y
These are all covered by defconfig. Are these fragments still necessary? Or are they supposed to work on custom configs? If the latter EXPERT may be set, hence the PROC_SYSCTL above. You probably also need SHMEM. -- Catalin