Kselftest¶

The Linux kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small tests to exercise individual code paths in the kernel.

You can use LAVA to deploy a kernel with matching kselftest binaries and run these tests on both virtual and physical hardware.

This example job runs the arm64 kselftest on an ampereone server. The matching kselftest binaries are deployed as an overlay into the NFS root filesystem.

```yaml device_type: ampereone job_name: arm64-kselftest visibility: public priority: 27

timeouts: job: minutes: 120 connection: minutes: 2 actions: finalize: seconds: 60 power-off: seconds: 60

context: arch: arm64 extra_kernel_args: ' rw kvm-arm.mode=nvhe'

actions: - deploy: to: tftp kernel: url: https://storage.tuxsuite.com/public/ampere/ci/builds/3BgK8l8H3lwyccIe08ogX16JPj2/Image.gz compression: gz type: image nfsrootfs: url: https://storage.tuxboot.com/debian/20250722/trixie/arm64/rootfs.tar.xz compression: xz format: tar overlays: kselftest: url: https://storage.tuxsuite.com/public/ampere/ci/builds/3BgK8l8H3lwyccIe08ogX16JPj2/kselftest.tar.xz compression: xz format: tar path: /opt/kselftests/default-in-kernel/ modules: url: https://storage.tuxsuite.com/public/ampere/ci/builds/3BgK8l8H3lwyccIe08ogX16JPj2/modules.tar.xz compression: xz format: tar path: /usr/ os: debian timeout: minutes: 30

boot: method: grub commands: nfs auto_login: login_prompt: 'login:' username: root prompts:
- root@(.*):[/~]#
- '/ #' timeout: minutes: 30
test: definitions:
- from: url name: kselftest-arm64 path: automated/linux/kselftest/kselftest.yaml repository: https://github.com/Linaro/test-definitions/releases/download/2025.10.01/2025.10.tar.zst compression: zstd lava-signal: kmsg parameters: ENVIRONMENT: production KSELFTEST_PATH: /opt/kselftests/default-in-kernel SHARD_INDEX: 1 SHARD_NUMBER: 1 SKIPFILE: skipfile-lkft.yaml SKIP_INSTALL: 'true' TST_CMDFILES: arm64 timeout: minutes: 60 ```

See kselftest test definition for what each test parameter does.