fix(el3-spm): improve direct messaging validation
Perform additional validation of the source and destination
IDs of direct messages.
Additionally track the sender of a direct request to allow
validating the target of the corresponding direct response.
Signed-off-by: Marc Bonnici <marc.bonnici@arm.com>
Change-Id: I8d39d53a02b8333246f1500c79ba04f149459c16
diff --git a/services/std_svc/spm/el3_spmc/spmc.h b/services/std_svc/spm/el3_spmc/spmc.h
index 61afee3..13875b9 100644
--- a/services/std_svc/spm/el3_spmc/spmc.h
+++ b/services/std_svc/spm/el3_spmc/spmc.h
@@ -131,6 +131,9 @@
/* Track the current runtime model of the SP. */
enum sp_runtime_model rt_model;
+
+ /* Track the source partition ID to validate a direct response. */
+ uint16_t dir_req_origin_id;
};
/*