diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index c798e354..6bb870b1 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -87,15 +87,50 @@ jobs:
         uses: actions/checkout@v3
         with:
           fetch-depth: 0
-      - name: Get changed files
+      - name: Get changed cfg files
         id: cfg-files
-        uses: tj-actions/changed-files@v46
-        with:
-          files: |
-            ./KVM/qemu/*.cfg
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          BASE="${{ github.event.pull_request.base.sha }}"
+          HEAD="${{ github.event.pull_request.head.sha }}"
+          MERGE_BASE="$(git merge-base "${BASE}" "${HEAD}")"
+
+          echo "Base SHA: ${BASE}"
+          echo "Head SHA: ${HEAD}"
+          echo "Merge base: ${MERGE_BASE}"
+
+          # Include added, copied, modified, renamed, and type-changed cfg files; exclude deleted files.
+          git diff --name-only --diff-filter=ACMRT "${MERGE_BASE}" "${HEAD}" -- 'KVM/qemu/*.cfg' > changed_cfg_files.txt
+
+          echo "Changed cfg files:"
+          cat changed_cfg_files.txt || true
+
+          {
+            echo "all_changed_files<<EOF"
+            cat changed_cfg_files.txt
+            echo "EOF"
+          } >> "$GITHUB_OUTPUT"
+
+          if [ -s changed_cfg_files.txt ]; then
+            echo "any_changed=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "any_changed=false" >> "$GITHUB_OUTPUT"
+          fi
+
       - name: Set matrix
         id: set-matrix
-        run: echo matrix=$(python3 -c 'print("${{ steps.cfg-files.outputs.all_changed_files }}".split())') >> $GITHUB_OUTPUT
+        shell: bash
+        run: |
+          python3 - <<'PY' >> "$GITHUB_OUTPUT"
+          import json
+
+          with open("changed_cfg_files.txt", "r", encoding="utf-8") as f:
+              files = [line.strip() for line in f if line.strip()]
+
+          print(f"matrix={json.dumps(files)}")
+          PY
       - name: Check cfg files lint
         if: steps.cfg-files.outputs.any_changed == 'true'
         run: |
diff --git a/KVM/qemu/tdx_seam_module.cfg b/KVM/qemu/tdx_seam_module.cfg
index 49263b25..de4f533b 100644
--- a/KVM/qemu/tdx_seam_module.cfg
+++ b/KVM/qemu/tdx_seam_module.cfg
@@ -16,5 +16,5 @@
     cpu_model = host
     read_cmd = "cat /sys/module/kvm_intel/parameters/%s"
     rdmsr_cmd = "rdmsr 0xfe --bitfield 15:15"
-    tdx_module_pattern = "tdx: module initialized"
+    tdx_module_pattern = "tdx: TDX-Module initialized"
     tdx_negative_pattern = "No TDX module loaded by BIOS"