Refactoring KPM support to check KPM status using CMD_ENABLE_KPM

kernel/core_hook.c

@@ -435,6 +435,12 @@ int ksu_handle_prctl(int option, unsigned long arg2, unsigned long arg3,
 		return 0;
 	}
 	#endif
+	if (arg2 == CMD_ENABLE_KPM) {
+    	bool KPM_Enabled = IS_ENABLED(CONFIG_KPM);
+    	if (copy_to_user((void __user *)arg3, &KPM_Enabled, sizeof(KPM_Enabled)))
+        	pr_info("KPM: copy_to_user() failed\n");
+    	return 0;
+	}
 
 	// all other cmds are for 'root manager'
 	if (!from_manager) {

kernel/ksu.h

@@ -23,6 +23,7 @@
 #define CMD_UID_SHOULD_UMOUNT 13
 #define CMD_IS_SU_ENABLED 14
 #define CMD_ENABLE_SU 15
+#define CMD_ENABLE_KPM 100
 
 #define EVENT_POST_FS_DATA 1
 #define EVENT_BOOT_COMPLETED 2