ci: common kernel build and embed ksud (#127)

.github/workflows/ksud.yml

@@ -0,0 +1,52 @@
+name: Build ksud
+on:
+  workflow_call:
+    inputs:
+      target:
+        required: true
+        type: string
+      use_cache:
+        required: false
+        type: boolean
+        default: true
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up cargo cache
+      if: inputs.use_cache == true
+      uses: actions/cache@v3
+      continue-on-error: false
+      with:
+        path: |
+          ~/.cargo/bin/
+          ~/.cargo/registry/index/
+          ~/.cargo/registry/cache/
+          ~/.cargo/git/db/
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+        restore-keys: ${{ runner.os }}-cargo-
+
+    - name: Set up ksud build cache
+      if: inputs.use_cache == true
+      uses: actions/cache@v3
+      continue-on-error: false
+      with:
+        path: ./userspace/ksud/target/
+        key: ${{ runner.os }}-ksud-${{ hashFiles('**/Cargo.lock') }}-${{ inputs.target }}
+        restore-keys: ${{ runner.os }}-ksud-
+
+    - name: Build ksud
+      uses: actions-rs/cargo@v1
+      with:
+        use-cross: true
+        command: build
+        args: --target ${{ inputs.target }} --release --manifest-path ./userspace/ksud/Cargo.toml
+
+    - name: Upload ksud artifact
+      uses: actions/upload-artifact@v3
+      with:
+        name: ksud-${{ inputs.target }}
+        path: ./userspace/ksud/target/**/release/ksud
+