xtensa: allow hiding DSR errors

In some situations we know that DSR errors will occur. Add a flag to
not print them to the console, so that user doesn't treat them as an
issue.

Author: igrr

src/target/xtensa.c

@@ -617,19 +617,24 @@ int xtensa_core_status_check(struct target *target)
 	dsr = xtensa_dm_core_status_get(&xtensa->dbg_mod);
 	LOG_DEBUG("%s: DSR (%08X)", target_name(target), dsr);
 	if (dsr & OCDDSR_EXECBUSY) {
-		LOG_ERROR("%s: DSR (%08X) indicates target still busy!", target_name(target), dsr);
+		if (!xtensa->suppress_dsr_errors)
+			LOG_ERROR("%s: DSR (%08X) indicates target still busy!", target_name(
+					target), dsr);
 		needclear = 1;
 	}
 	if (dsr & OCDDSR_EXECEXCEPTION) {
-		LOG_ERROR("%s: DSR (%08X) indicates DIR instruction generated an exception!",
-			target_name(target),
-			dsr);
+		if (!xtensa->suppress_dsr_errors)
+			LOG_ERROR(
+				"%s: DSR (%08X) indicates DIR instruction generated an exception!",
+				target_name(target),
+				dsr);
 		needclear = 1;
 	}
 	if (dsr & OCDDSR_EXECOVERRUN) {
-		LOG_ERROR("%s: DSR (%08X) indicates DIR instruction generated an overrun!",
-			target_name(target),
-			dsr);
+		if (!xtensa->suppress_dsr_errors)
+			LOG_ERROR("%s: DSR (%08X) indicates DIR instruction generated an overrun!",
+				target_name(target),
+				dsr);
 		needclear = 1;
 	}
 	if (needclear) {

src/target/xtensa.h

@@ -289,6 +289,7 @@ struct xtensa {
 	struct xtensa_sw_breakpoint *sw_brps;
 	bool trace_active;
 	bool permissive_mode;
+	bool suppress_dsr_errors;
 };
 
 static inline struct xtensa *target_to_xtensa(struct target *target)