commit 925fda42f750bf6f2a8a103cd828de71b0769593
author Chris Kay <chris.kay@arm.com> Tue May 25 10:42:56 2021 +0100
committer Chris Kay <chris.kay@arm.com> Tue Oct 26 12:14:32 2021 +0100
tree bb5cf37dea36b22cc5a31f25d8730210725501ea
parent a5fde28f750574fe4105acd25563bca5fb0219b0

refactor(amu): conditionally compile auxiliary counter support

This change reduces preprocessor dependencies on the
`AMU_GROUP1_NR_COUNTERS` and `AMU_GROUP1_COUNTERS_MASK` definitions, as
these values will eventually be discovered dynamically.

In their stead, we introduce the `ENABLE_AMU_AUXILIARY_COUNTERS` build
option, which will enable support for dynamically detecting and
enabling auxiliary AMU counters.

This substantially reduces the amount of memory used by platforms that
know ahead of time that they do not have any auxiliary AMU counters.

Change-Id: I3d998aff44ed5489af4857e337e97634d06e3ea1
Signed-off-by: Chris Kay <chris.kay@arm.com>

Makefile

diff --git a/Makefile b/Makefile
index 814f98b..3aa0f9c 100644
--- a/Makefile
+++ b/Makefile
@@ -955,6 +955,7 @@
         DYN_DISABLE_AUTH \
         EL3_EXCEPTION_HANDLING \
         ENABLE_AMU \
+        ENABLE_AMU_AUXILIARY_COUNTERS \
         AMU_RESTRICT_COUNTERS \
         ENABLE_ASSERTIONS \
         ENABLE_MPAM_FOR_LOWER_ELS \
@@ -1056,6 +1057,7 @@
         DECRYPTION_SUPPORT_${DECRYPTION_SUPPORT} \
         DISABLE_MTPMU \
         ENABLE_AMU \
+        ENABLE_AMU_AUXILIARY_COUNTERS \
         AMU_RESTRICT_COUNTERS \
         ENABLE_ASSERTIONS \
         ENABLE_BTI \