diff --git a/.github/workflows/xls-modules.yml b/.github/workflows/xls-modules.yml
new file mode 100644
index 00000000000..37e8a92a1a2
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+++ b/.github/workflows/xls-modules.yml
@@ -0,0 +1,54 @@
+# https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions
+# See also: https://github.com/marketplace/actions/bazel-action
+
+name: Continuous Integration
+on:
+  # Avoid triggering on pushes to /all/ open PR branches.
+  push:
+    branches:
+      - ci/dslx-dma-rebase-axi
+    paths-ignore:
+      # Do not trigger action when docs are updated.
+      - 'docs/**'
+  pull_request:
+    branches:
+      - main
+  # This lets us trigger manually from the UI.
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Bazel Build (opt)
+    runs-on:
+      labels: ubuntu-22.04-64core
+    timeout-minutes: 600
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Mount Bazel Cache
+        uses: actions/cache@v3
+        with:
+          path: "~/.cache/bazel"
+          # Create/use a cache called bazel-cache-22_04-<commit hash>
+          # and read the latest cache with prefix bazel-cache-22_04-
+          # if it doesn't already exist.
+          key: bazel-cache-22_04-${{ github.sha }}
+          restore-keys: bazel-cache-22_04-
+
+      - name: Install dependencies via apt
+        run: sudo apt-get install python3-distutils python3-dev python-is-python3 libtinfo5  build-essential liblapack-dev libblas-dev gfortran
+
+      - name: Install bazelisk
+        run: |
+          curl -LO "https://github.com/bazelbuild/bazelisk/releases/download/v1.19.0/bazelisk-linux-amd64"
+          mkdir -p "${GITHUB_WORKSPACE}/bin/"
+          mv bazelisk-linux-amd64 "${GITHUB_WORKSPACE}/bin/bazel"
+          chmod +x "${GITHUB_WORKSPACE}/bin/bazel"
+
+      - name: Bazel Build Tools (opt)
+        run: |
+          "${GITHUB_WORKSPACE}/bin/bazel" build -c opt --test_output=errors -- //xls/dslx:interpreter_main //xls/dslx/ir_convert:ir_converter_main //xls/tools:opt_main //xls/tools:codegen_main
+
+      - name: Bazel Test All (opt)
+        run: |
+          "${GITHUB_WORKSPACE}/bin/bazel" test -c opt --test_output=errors -- //xls/...