feat(trbe): add trbe under feature detection mechanism
This change adds "FEAT_TRBE" to be part of feature detection mechanism.
Previously feature enablement flags were of boolean type, containing
either 0 or 1. With the introduction of feature detection procedure
we now support three states for feature enablement build flags(0 to 2).
Accordingly, "ENABLE_TRBE_FOR_NS" flag is now modified from boolean
to numeric type to align with the feature detection.
Change-Id: I53d3bc8dc2f6eac63feef22dfd627f3a48480afc
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
diff --git a/docs/getting_started/build-options.rst b/docs/getting_started/build-options.rst
index 79159b7..26d5458 100644
--- a/docs/getting_started/build-options.rst
+++ b/docs/getting_started/build-options.rst
@@ -988,11 +988,12 @@
0 to 2, to align with the ``FEATURE_DETECTION`` mechanism. The default is 0
and it is automatically disabled when the target architecture is AArch32.
-- ``ENABLE_TRBE_FOR_NS``: This flag is used to enable access of trace buffer
+- ``ENABLE_TRBE_FOR_NS``: Numeric value to enable access of trace buffer
control registers from NS ELs, NS-EL2 or NS-EL1(when NS-EL2 is implemented
but unused) when FEAT_TRBE is implemented. TRBE is an optional architectural
- feature for AArch64. The default is 0 and it is automatically disabled when
- the target architecture is AArch32.
+ feature for AArch64. This flag can take the values 0 to 2, to align with the
+ ``FEATURE_DETECTION`` mechanism. The default is 0 and it is automatically
+ disabled when the target architecture is AArch32.
- ``ENABLE_SYS_REG_TRACE_FOR_NS``: Boolean option to enable trace system
registers access from NS ELs, NS-EL2 or NS-EL1 (when NS-EL2 is implemented