WIP compatibility testing

Author: aelovikov-intel

.github/workflows/sycl-linux-precommit.yml

@@ -231,3 +231,19 @@ jobs:
   #     toolchain_artifact: ${{ needs.build.outputs.toolchain_artifact }}
   #     toolchain_artifact_filename: ${{ needs.build.outputs.toolchain_artifact_filename }}
   #     toolchain_decompress_command: ${{ needs.build.outputs.toolchain_decompress_command }}
+
+  compatibility:
+    needs: [build, detect_changes]
+    if: ${{ always() && !cancelled() && needs.build.outputs.build_conclusion == 'success' }}
+    uses: ./.github/workflows/sycl-linux-run-tests.yml
+    with:
+      name: E2E Backward ABI compatibility
+      runner: '["Linux", "pvc"]'
+      image: ghcr.io/intel/llvm/sycl_e2e_binaries_6.1.0:nightly-2025-07-18
+      image_options: -u 1001 --device=/dev/dri -v /dev/dri/by-path:/dev/dri/by-path --privileged --cap-add SYS_ADMIN
+      target_devices: level_zero:gpu
+      repo_ref: nightly-2025-07-18
+      toolchain_artifact: ${{ needs.build.outputs.toolchain_artifact }}
+      toolchain_artifact_filename: ${{ needs.build.outputs.toolchain_artifact_filename }}
+      toolchain_decompress_command: ${{ needs.build.outputs.toolchain_decompress_command }}
+      e2e_testing_mode: 'run-only'

.github/workflows/sycl-linux-run-tests.yml

@@ -60,9 +60,10 @@ on:
 
       e2e_binaries_artifact:
         description: |
-          Must be set if `e2e_testing_mode` is equal to `run-only` and the
-          artifact must exist. Can be set in other modes resulting in artifact
-          upload.
+          When set in modes other than `run-only` results in artifact upload.
+          For `run-only` mode, if specified, means downloading pre-built
+          binaries from the artifact, otherwise they are expected to be part of
+          the container.
         type: string
         default: ''
         required: False

devops/actions/run-tests/e2e/action.yml

@@ -24,26 +24,34 @@ runs:
   using: "composite"
   steps:
   - name: Checkout E2E tests
+    if: ${{ inputs.testing_mode != 'run-only'  || inputs.binaries_artifact }}
     uses: actions/checkout@v4
     with:
       path: llvm
       ref: ${{ inputs.ref || github.sha }}
       sparse-checkout: |
         llvm/utils/lit
         sycl/test-e2e
-
   - name: Download E2E Binaries
-    if: inputs.testing_mode == 'run-only'
+    if: ${{ inputs.testing_mode == 'run-only'  && inputs.binaries_artifact != '' }}
     uses: actions/download-artifact@v4
     with:
       name: ${{ inputs.binaries_artifact }}
   - name: Extract E2E Binaries
-    if: inputs.testing_mode == 'run-only'
+    if: ${{ inputs.testing_mode == 'run-only'  && inputs.binaries_artifact != '' }}
     shell: bash
     run: |
       mkdir build-e2e
       tar -I 'zstd' -xf e2e_binaries.tar.zst -C build-e2e
 
+  - name: Extract E2E tests from container image
+    if: ${{ inputs.testing_mode == 'run-only'  && inputs.binaries_artifact == '' }}
+    shell: bash
+    run: |
+      mkdir build-e2e llvm
+      tar -I 'zstd' -xf /sycl-prebuilt/e2e_binaries.tar.zst -C build-e2e
+      tar -I 'zstd' -xf /sycl-prebuilt/e2e_sources.tar.zst -C llvm
+
   - name: Deduce E2E CMake options
     if: inputs.testing_mode != 'run-only'
     id: cmake_opts