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+# SPDX-License-Identifier: GPL-2.0
+
+config EARLY_PRINTK
+ def_bool y
+
+config DEBUG_ENTRY
+ bool "Debug low-level entry code"
+ depends on DEBUG_KERNEL
+ help
+ This option enables sanity checks in s390 low-level entry code.
+ Some of these sanity checks may slow down kernel entries and
+ exits or otherwise impact performance.
+
+ If unsure, say N.
+
+config CIO_INJECT
+ bool "CIO Inject interfaces"
+ depends on DEBUG_KERNEL && DEBUG_FS
+ help
+ This option provides a debugging facility to inject certain artificial events
+ and instruction responses to the CIO layer of Linux kernel. The newly created
+ debugfs user-interfaces will be at /sys/kernel/debug/s390/cio/*