Add github action for kernel build and kselftest testing

Signed-off-by: Shreeya Patel <spatel@ciq.com>

Author: shreeya-patel98

.github/workflows/kernel-build-and-test-x86_64.yml

@@ -0,0 +1,60 @@
+name: Automated kernel build and test (x86_64)
+on: [push]
+
+permissions:
+  contents: read
+  actions: read
+
+jobs:
+  build:
+    name: Build x86_64
+    runs-on: kernel-build
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 1
+
+    # Host deps + KVM / FUSE validation
+    - name: Install host dependencies & verify KVM/FUSE
+      run: |
+        set -euxo pipefail
+        sudo apt-get update
+        sudo apt-get install -y fuse3 cpu-checker podman
+        sudo modprobe fuse # guarantee /dev/fuse
+        if ! sudo kvm-ok ; then
+          echo "::warning::KVM acceleration not available on this runner."
+        fi
+        if [ -e /dev/kvm ]; then
+          sudo chmod 0666 /dev/kvm
+        fi
+
+    # Kernel build inside CIQ builder
+    - name: Build kernel inside CIQ builder container
+      run: |
+        set -euxo pipefail
+        mkdir -p output
+        df -h
+        cat /proc/cpuinfo
+        podman run --rm --pull=always \
+          --privileged \
+          --device=/dev/fuse \
+          $([ -e /dev/kvm ] && echo "--device=/dev/kvm") \
+          -v "$PWD":/src \
+          -v "$PWD/output":/output \
+          --security-opt label=disable \
+          pulp.prod.ciq.dev/ciq/cicd/lts-images/builder \
+          build_kernel.sh -c lts-9.4-kernel-builder
+        sudo dmesg
+
+    # Artifacts: qcow2 + metadata
+    - name: Upload build artifacts
+      uses: actions/upload-artifact@v4
+      if: always()
+      with:
+        name: kernel-build-x86_64
+        path: |
+          output/*.qcow2
+          output/last_build_image.txt
+        retention-days: 7