Arm backend: Add OOTB tests (#12392)

Signed-off-by: Tom Allsop <[email protected]>

Author: tom-arm

.github/workflows/trunk.yml

@@ -302,6 +302,37 @@ jobs:
           exit 1
         fi
 
+  test-arm-ootb-linux:
+    name: test-arm-ootb-linux
+    uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main
+    permissions:
+      id-token: write
+      contents: read
+    with:
+      runner: linux.2xlarge
+      docker-image: executorch-ubuntu-22.04-arm-sdk
+      submodules: 'recursive'
+      ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
+      timeout: 90
+      script: |
+        # The generic Linux job chooses to use base env, not the one setup by the image
+        CONDA_ENV=$(conda env list --json | jq -r ".envs | .[-1]")
+        conda activate "${CONDA_ENV}"
+
+        # Follow the steps required before running the notebooks
+        # Try to mirror these as closely as possible
+        source .ci/scripts/utils.sh
+        install_executorch "--use-pt-pinned-commit"
+
+        .ci/scripts/setup-arm-baremetal-tools.sh
+        source examples/arm/ethos-u-scratch/setup_path.sh
+
+        # Install requirements for converting notebooks
+        pip install notebook
+
+        # Run OOTB tests
+        backends/arm/test/test_arm_ootb.sh
+
   test-coreml-delegate:
     name: test-coreml-delegate
     uses: pytorch/test-infra/.github/workflows/macos_job.yml@main

backends/arm/test/test_arm_ootb.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+# Copyright 2025 Arm Limited and/or its affiliates.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+set -e
+
+run_ootb_tests_ethos_u() {
+    echo "$FUNCNAME: Running out-of-the-box tests for Arm Ethos-U"
+    jupyter nbconvert \
+        --to notebook \
+        --execute examples/arm/ethos_u_minimal_example.ipynb
+    echo "${FUNCNAME}: PASS"
+}
+
+run_ootb_tests_ethos_u