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>
diff --git a/lib/extensions/amu/aarch64/amu_helpers.S b/lib/extensions/amu/aarch64/amu_helpers.S
index 9989abd..0f6d799 100644
--- a/lib/extensions/amu/aarch64/amu_helpers.S
+++ b/lib/extensions/amu/aarch64/amu_helpers.S
@@ -83,6 +83,7 @@
write AMEVCNTR03_EL0 /* index 3 */
endfunc amu_group0_cnt_write_internal
+#if ENABLE_AMU_AUXILIARY_COUNTERS
/*
* uint64_t amu_group1_cnt_read_internal(int idx);
*
@@ -217,6 +218,7 @@
write AMEVTYPER1E_EL0 /* index 14 */
write AMEVTYPER1F_EL0 /* index 15 */
endfunc amu_group1_set_evtype_internal
+#endif
/*
* Accessor functions for virtual offset registers added with FEAT_AMUv1p1
@@ -297,6 +299,7 @@
write AMEVCNTVOFF03_EL2 /* index 3 */
endfunc amu_group0_voffset_write_internal
+#if ENABLE_AMU_AUXILIARY_COUNTERS
/*
* uint64_t amu_group1_voffset_read_internal(int idx);
*
@@ -383,3 +386,4 @@
write AMEVCNTVOFF1E_EL2 /* index 14 */
write AMEVCNTVOFF1F_EL2 /* index 15 */
endfunc amu_group1_voffset_write_internal
+#endif