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diff --git a/doc/cpu_supplement/general.t b/doc/cpu_supplement/general.t
index deca4de3b3..9c952a7e97 100644
--- a/doc/cpu_supplement/general.t
+++ b/doc/cpu_supplement/general.t
@@ -362,6 +362,18 @@ provide the following two functions
counter values.
@end itemize
+@section Interrupt Profiling
+
+The RTEMS profiling needs support by the CPU port for the interrupt entry and
+exit times. In case profiling is enabled via the RTEMS build configuration
+option @code{--enable-profiling} (in this case the pre-processor symbol
+@code{RTEMS_PROFILING} is defined) the CPU port may provide data for the
+interrupt entry and exit times of the outer-most interrupt. The CPU port can
+feed interrupt entry and exit times with the
+@code{_Profiling_Outer_most_interrupt_entry_and_exit()} function
+(@code{#include <rtems/score/profiling.h>}). For an example please have a look
+at @code{cpukit/score/cpu/arm/arm_exc_interrupt.S}.
+
@c
@c
@c