tools: jailhouse: Do not dump console on enabling errors

We cannot reliably tell apart errors that happen before we call into the
hypervisor binary from those that happen after that. The latters may
have left some relevant messages in the console buffer, but the former
can make us dump confusing messages from a previous Jailhouse run.

Better let the user decide if the console content should be shown via an
explicit invocation of "jailhouse console".

Reported-and-suggested-by: Ralf Ramsauer <ralf.ramsauer@oth-regensburg.de>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

tools/jailhouse.c

@@ -234,10 +234,8 @@ static int enable(int argc, char *argv[])
 	fd = open_dev();
 
 	err = ioctl(fd, JAILHOUSE_ENABLE, config);
-	if (err) {
+	if (err)
 		perror("JAILHOUSE_ENABLE");
-		dump_console(fd, true);
-	}
 
 	close(fd);
 	free(config);