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>

bl31/bl31.mk

diff --git a/bl31/bl31.mk b/bl31/bl31.mk
index 336ad2b..2f9dc65 100644
--- a/bl31/bl31.mk
+++ b/bl31/bl31.mk
@@ -150,6 +150,10 @@
 BL31_SOURCES		+=	lib/extensions/trf/aarch64/trf.c
 endif
 
+ifneq (${ENABLE_FEAT_FPMR},0)
+BL31_SOURCES		+=	lib/extensions/fpmr/fpmr.c
+endif
+
 ifeq (${WORKAROUND_CVE_2017_5715},1)
 BL31_SOURCES		+=	lib/cpus/aarch64/wa_cve_2017_5715_bpiall.S	\
 				lib/cpus/aarch64/wa_cve_2017_5715_mmu.S