diff --git a/Kernel/Arch/x86/Processor.h b/Kernel/Arch/x86/Processor.h
index d0246b9448..a1b6bf97e2 100644
--- a/Kernel/Arch/x86/Processor.h
+++ b/Kernel/Arch/x86/Processor.h
@@ -258,6 +258,8 @@ public:
 
     ALWAYS_INLINE ProcessorInfo& info() { return *m_info; }
 
+    u64 time_spent_idle() const;
+
     static bool is_smp_enabled();
 
     ALWAYS_INLINE static Processor& current()
diff --git a/Kernel/Arch/x86/common/Processor.cpp b/Kernel/Arch/x86/common/Processor.cpp
index 36913ad128..fb97ab0d65 100644
--- a/Kernel/Arch/x86/common/Processor.cpp
+++ b/Kernel/Arch/x86/common/Processor.cpp
@@ -1323,4 +1323,9 @@ void Processor::assume_context(Thread& thread, FlatPtr flags)
     VERIFY_NOT_REACHED();
 }
 
+u64 Processor::time_spent_idle() const
+{
+    return m_idle_thread->time_in_user() + m_idle_thread->time_in_kernel();
+}
+
 }