core: spmc: handle BTI/PAUTH info in SP manifest

Provide information to the SP whether BTI and PAUTH are enabled in
OP-TEE by updating the relevant DT node in the SP manifest.
This way the SP can detect if the required protection is not available.

Signed-off-by: Gabor Toth <gabor.toth2@arm.com>
Acked-by: Etienne Carriere <etienne.carriere@foss.st.com>

core/arch/arm/kernel/secure_partition.c

@@ -1411,6 +1411,22 @@ static TEE_Result handle_hw_features(void *fdt)
 			return res;
 	}
 
+	/* Modify the property only if it's already present */
+	if (!sp_dt_get_u32(fdt, node, "bti", &val)) {
+		res = fdt_setprop_u32(fdt, node, "bti",
+				      feat_bti_is_implemented());
+		if (res)
+			return res;
+	}
+
+	/* Modify the property only if it's already present */
+	if (!sp_dt_get_u32(fdt, node, "pauth", &val)) {
+		res = fdt_setprop_u32(fdt, node, "pauth",
+				      feat_pauth_is_implemented());
+		if (res)
+			return res;
+	}
+
 	return TEE_SUCCESS;
 }