Use ssh-agent with secret key to access saturn

.github/actions/prepare-rtl/action.yml

@@ -29,7 +29,9 @@ runs:
           sims/firesim/sim
           generators/gemmini/software/gemmini-rocc-tests
         key: ${{ inputs.group-key }}-${{ github.sha }}
-
+    - uses: webfactory/[email protected]
+      with:
+        ssh-private-key: ${{ secrets.SATURN_SECRET }}
     - name: Run RTL build if not cached
       run: |
         conda activate ${{ env.conda-env-name-no-time }}-$(date --date "${{ env.workflow-timestamp }}" +%Y%m%d)-${{ inputs.toolchain }}

.github/workflows/chipyard-full-flow.yml

@@ -77,6 +77,9 @@ jobs:
       - name: Setup repo copy
         run: |
           git clone $GITHUB_WORKSPACE ${{ env.REMOTE_WORK_DIR }}
+      - uses: webfactory/[email protected]
+        with:
+          ssh-private-key: ${{ secrets.SATURN_SECRET }}
       - name: Setup repo
         run: |
           cd ${{ env.REMOTE_WORK_DIR }}

.github/workflows/chipyard-run-tests.yml

@@ -115,8 +115,13 @@ jobs:
       - name: Create conda env
         uses: ./.github/actions/create-conda-env
       - name: Check commits of each submodule
+        uses: webfactory/[email protected]
+          with:
+            ssh-private-key: ${{ secrets.SATURN_SECRET }}
         run: |
             conda activate ${{ env.conda-env-name-no-time }}-$(date --date "${{ env.workflow-timestamp }}" +%Y%m%d)-riscv-tools
+            eval 'ssh-agent -s'
+            ssh-add - <<< "${{ secrets.SATURN_SECRET }}"
             .github/scripts/check-commit.sh
 
   documentation-check: