diff --git a/scripts/common/platform.sh b/scripts/common/platform.sh
index 26823a6..b20f88f 100755
--- a/scripts/common/platform.sh
+++ b/scripts/common/platform.sh
@@ -9,7 +9,15 @@ ROOT_DIR="$(cd "${_PLATFORM_DIR}/../.." && pwd)"
 
 # Auto-detect platform if not set.
 if [[ -z "${PLATFORM:-}" ]]; then
-  if lspci 2>/dev/null | grep -qiE "XPU|Kunlun"; then
+  # Capture xpu-smi output first; piping it directly can trigger SIGPIPE under
+  # pipefail when grep -q exits early.
+  _XPU_SMI_OUT=""
+  if command -v xpu-smi >/dev/null 2>&1; then
+    _XPU_SMI_OUT=$(xpu-smi 2>/dev/null || true)
+  fi
+  if [[ -n "$_XPU_SMI_OUT" ]] && grep -qiE "P800|Kunlun" <<< "$_XPU_SMI_OUT"; then
+    PLATFORM="kunlun_p800"
+  elif lspci 2>/dev/null | grep -qiE "XPU|Kunlun"; then
     PLATFORM="kunlun_p800"
   elif command -v nvidia-smi >/dev/null 2>&1; then
     PLATFORM="nvidia_h200"
@@ -17,6 +25,7 @@ if [[ -z "${PLATFORM:-}" ]]; then
     echo "ERROR: Could not auto-detect PLATFORM. Set PLATFORM env var explicitly." >&2
     exit 1
   fi
+  unset _XPU_SMI_OUT
   echo "Auto-detected platform: ${PLATFORM}"
 fi