tools: add Arm FF-A mediator

Adds a new "ffa" value to the Enumeration "tee_type" to indicate if a
guest is trusted to use FF-A.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com>
Reviewed-by: Henry Wang <Henry.Wang@arm.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>

tools/include/libxl.h

@@ -292,6 +292,11 @@
  */
 #define LIBXL_HAVE_BUILDINFO_ARCH_ARM_TEE 1
 
+/*
+ * arch_arm.tee field in libxl_domain_build_info has ffa value.
+ */
+#define LIBXL_HAVE_BUILDINFO_ARCH_ARM_TEE_FFA 1
+
 /*
  * libxl_domain_build_info has the arch_arm.sve_vl field.
  */

tools/libs/light/libxl_arm.c

@@ -207,6 +207,9 @@ int libxl__arch_domain_prepare_config(libxl__gc *gc,
     case LIBXL_TEE_TYPE_OPTEE:
         config->arch.tee_type = XEN_DOMCTL_CONFIG_TEE_OPTEE;
         break;
+    case LIBXL_TEE_TYPE_FFA:
+        config->arch.tee_type = XEN_DOMCTL_CONFIG_TEE_FFA;
+        break;
     default:
         LOG(ERROR, "Unknown TEE type %d",
             d_config->b_info.tee);

tools/libs/light/libxl_types.idl

@@ -520,7 +520,8 @@ libxl_gic_version = Enumeration("gic_version", [
 
 libxl_tee_type = Enumeration("tee_type", [
     (0, "none"),
-    (1, "optee")
+    (1, "optee"),
+    (2, "ffa"),
     ], init_val = "LIBXL_TEE_TYPE_NONE")
 
 libxl_sve_type = Enumeration("sve_type", [