commit a57e18e4337b74ce3d133a18f07fa891f0fd5fa9
author Arvind Ram Prakash <arvind.ramprakash@arm.com> Mon Nov 11 14:32:37 2024 -0600
committer Arvind Ram Prakash <arvind.ramprakash@arm.com> Thu Dec 12 10:03:23 2024 -0600
tree 0a0ac4099cd2d41694160d5a20b82ff31658ac5c
parent e372c291532ef1c0644edbd9c1a1d6b2f167402c

feat(fpmr): disable FPMR trap

This patch enables support of FEAT_FPMR by enabling access
to FPMR register. It achieves it by setting the EnFPM bit of
SCR_EL3. This feature is currently enabled for NS world only.

Reference:
https://developer.arm.com/documentation/109697/2024_09/
Feature-descriptions/The-Armv9-5-architecture-extension?lang=en

Change-Id: I580c409b9b22f8ead0737502280fb9093a3d5dd2
Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>

make_helpers/arch_features.mk

diff --git a/make_helpers/arch_features.mk b/make_helpers/arch_features.mk
index 57609d5..a1db0b8 100644
--- a/make_helpers/arch_features.mk
+++ b/make_helpers/arch_features.mk
@@ -408,6 +408,9 @@
 # if FEAT_BRBE is implemented.
 ENABLE_BRBE_FOR_NS			?=	0
 
+# Flag to enable Floating point exception Mode Register Feature (FEAT_FPMR)
+ENABLE_FEAT_FPMR			?=	0
+
 #----
 # 9.3
 #----