Add bootloader choice for safe vs full NVIDIA boot

iso/builder/smoketest.sh

@@ -26,6 +26,15 @@ echo ""
 
 KVER=$(uname -r)
 info "kernel: $KVER"
+NVIDIA_BOOT_MODE="safe"
+for arg in $(cat /proc/cmdline 2>/dev/null); do
+    case "$arg" in
+        bee.nvidia.mode=*)
+            NVIDIA_BOOT_MODE="${arg#*=}"
+            ;;
+    esac
+done
+info "nvidia boot mode: ${NVIDIA_BOOT_MODE}"
 
 # --- PATH & binaries ---
 echo "-- PATH & binaries --"
@@ -62,8 +71,10 @@ fi
 for mod in nvidia_modeset nvidia_uvm; do
     if /sbin/lsmod 2>/dev/null | grep -q "^$mod "; then
         ok "module loaded: $mod"
+    elif [ "${NVIDIA_BOOT_MODE}" = "full" ]; then
+        fail "module NOT loaded in full mode: $mod"
     else
-        warn "module not loaded at boot: $mod"
+        warn "module not loaded in safe mode: $mod"
     fi
 done
 
@@ -79,6 +90,8 @@ done
 
 if [ -e /dev/nvidia-uvm ]; then
     ok "/dev/nvidia-uvm exists"
+elif [ "${NVIDIA_BOOT_MODE}" = "full" ]; then
+    fail "/dev/nvidia-uvm missing in full mode"
 else
     warn "/dev/nvidia-uvm missing — CUDA stress path may be unavailable until loaded on demand"
 fi