| 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | |
| 3 | config EARLY_PRINTK |
| 4 | def_bool y |
| 5 | |
| 6 | config DEBUG_ENTRY |
| 7 | bool "Debug low-level entry code" |
| 8 | depends on DEBUG_KERNEL |
| 9 | help |
| 10 | This option enables sanity checks in s390 low-level entry code. |
| 11 | Some of these sanity checks may slow down kernel entries and |
| 12 | exits or otherwise impact performance. |
| 13 | |
| 14 | If unsure, say N. |
| 15 | |
| 16 | config STRICT_MM_TYPECHECKS |
| 17 | bool "Strict Memory Management Type Checks" |
| 18 | depends on DEBUG_KERNEL |
| 19 | help |
| 20 | Enable strict type checking for memory management types like pte_t |
| 21 | and pmd_t. This generates slightly worse code and should be used |
| 22 | for debug builds. |
| 23 | |
| 24 | If unsure, say N. |
| 25 | |
| 26 | config CIO_INJECT |
| 27 | bool "CIO Inject interfaces" |
| 28 | depends on DEBUG_KERNEL && DEBUG_FS |
| 29 | help |
| 30 | This option provides a debugging facility to inject certain artificial events |
| 31 | and instruction responses to the CIO layer of Linux kernel. The newly created |
| 32 | debugfs user-interfaces will be at /sys/kernel/debug/s390/cio/* |