feat(spm_mm): add support to save and restore fp regs
Add the support to save Nwd's floating point registers before switching
to SEL0 and then restore it after coming out of it. Emit a warning
message if SPM_MM is built with CTX_INCLUDE_FPREGS == 0
There is no need to save FP registers of SEL0 because secure partitions
run to completion.
This change is used to prevent context corruption if secure partition
enabled and Nwd decide to use floating point registers.
Signed-off-by: Nishant Sharma <nishant.sharma@arm.com>
Change-Id: I1eea16ea2311a4f00a806ea72c118752821b9abb
diff --git a/services/std_svc/spm/spm_mm/spm_mm.mk b/services/std_svc/spm/spm_mm/spm_mm.mk
index 78ef0c9..f6691c3 100644
--- a/services/std_svc/spm/spm_mm/spm_mm.mk
+++ b/services/std_svc/spm/spm_mm/spm_mm.mk
@@ -16,6 +16,9 @@
ifeq (${ENABLE_SME_FOR_NS},1)
$(error "Error: SPM_MM is not compatible with ENABLE_SME_FOR_NS")
endif
+ifeq (${CTX_INCLUDE_FPREGS},0)
+ $(warning "Warning: SPM_MM: CTX_INCLUDE_FPREGS is set to 0")
+endif
SPM_MM_SOURCES := $(addprefix services/std_svc/spm/spm_mm/, \
${ARCH}/spm_mm_shim_exceptions.S \