chore(docs): explain what the plat_amu_aux_enables array does
Change-Id: I90f1bcaa8bec133d3be81785aea11948208ca0a5
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
diff --git a/docs/components/activity-monitors.rst b/docs/components/activity-monitors.rst
index 4c33d42..d25fcb1 100644
--- a/docs/components/activity-monitors.rst
+++ b/docs/components/activity-monitors.rst
@@ -21,7 +21,9 @@
As a security precaution, Trusted Firmware-A does not enable these by default.
Instead, platforms must configure their auxiliary counters through the
-``plat_amu_aux_enables`` platform hook.
+``plat_amu_aux_enables`` platform hook. This is a per-core array indexed with
+``plat_my_core_pos()``. A core's value will be written verbatim into
+``AMCNTENSET1_EL0``.
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