stm32mp1: disable neon in sp_min
Disable use of Neon VFP support for platform stm32mp1 when
building with SP_MIN runtime services as these can conflict with
non-secure world use of NEON support. This is preferred over a
systematic backup/restore of NEON context when switching
between non-secure and secure worlds.
When NEON support is disabled, this is done for both BL2 and BL32 as
build process uses common libraries built once for both binaries.
Change-Id: I4e8808dcb6ef58fc839e6f85fd6e45cfbaa34be0
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
diff --git a/plat/st/stm32mp1/platform.mk b/plat/st/stm32mp1/platform.mk
index b0ba82a..9998236 100644
--- a/plat/st/stm32mp1/platform.mk
+++ b/plat/st/stm32mp1/platform.mk
@@ -16,6 +16,11 @@
$(eval $(call assert_boolean,PLAT_XLAT_TABLES_DYNAMIC))
$(eval $(call add_define,PLAT_XLAT_TABLES_DYNAMIC))
+ifeq ($(AARCH32_SP),sp_min)
+# Disable Neon support: sp_min runtime may conflict with non-secure world
+TF_CFLAGS += -mfloat-abi=soft
+endif
+
# Not needed for Cortex-A7
WORKAROUND_CVE_2017_5715:= 0