Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | menu "Kernel hacking" |
| 2 | |
Ralf Baechle | 192ef36 | 2006-07-07 14:07:18 +0100 | [diff] [blame] | 3 | config TRACE_IRQFLAGS_SUPPORT |
| 4 | bool |
| 5 | default y |
| 6 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | source "lib/Kconfig.debug" |
| 8 | |
Ralf Baechle | 4dd92e1 | 2009-12-17 01:57:30 +0000 | [diff] [blame] | 9 | config EARLY_PRINTK |
David Rientjes | 6a108a1 | 2011-01-20 14:44:16 -0800 | [diff] [blame] | 10 | bool "Early printk" if EXPERT |
Ralf Baechle | 4dd92e1 | 2009-12-17 01:57:30 +0000 | [diff] [blame] | 11 | depends on SYS_HAS_EARLY_PRINTK |
| 12 | default y |
| 13 | help |
| 14 | This option enables special console drivers which allow the kernel |
| 15 | to print messages very early in the bootup process. |
| 16 | |
| 17 | This is useful for kernel debugging when your machine crashes very |
| 18 | early before the console code is initialized. For normal operation, |
| 19 | it is not recommended because it looks ugly on some machines and |
| 20 | doesn't cooperate with an X server. You should normally say N here, |
| 21 | unless you want to debug such a crash. |
| 22 | |
Dmitri Vorobiev | 6acc7d4 | 2009-11-21 22:34:41 +0200 | [diff] [blame] | 23 | config CMDLINE_BOOL |
| 24 | bool "Built-in kernel command line" |
| 25 | default n |
| 26 | help |
| 27 | For most systems, it is firmware or second stage bootloader that |
| 28 | by default specifies the kernel command line options. However, |
| 29 | it might be necessary or advantageous to either override the |
| 30 | default kernel command line or add a few extra options to it. |
| 31 | For such cases, this option allows you to hardcode your own |
| 32 | command line options directly into the kernel. For that, you |
| 33 | should choose 'Y' here, and fill in the extra boot arguments |
| 34 | in CONFIG_CMDLINE. |
| 35 | |
| 36 | The built-in options will be concatenated to the default command |
| 37 | line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default |
| 38 | command line will be ignored and replaced by the built-in string. |
| 39 | |
| 40 | Most MIPS systems will normally expect 'N' here and rely upon |
| 41 | the command line from the firmware or the second-stage bootloader. |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | config CMDLINE |
| 44 | string "Default kernel command string" |
Dmitri Vorobiev | 6acc7d4 | 2009-11-21 22:34:41 +0200 | [diff] [blame] | 45 | depends on CMDLINE_BOOL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | default "" |
| 47 | help |
Jan Altenberg | 3e7f9b82 | 2007-01-25 20:46:14 +0100 | [diff] [blame] | 48 | On some platforms, there is currently no way for the boot loader to |
Dmitri Vorobiev | 6acc7d4 | 2009-11-21 22:34:41 +0200 | [diff] [blame] | 49 | pass arguments to the kernel. For these platforms, and for the cases |
| 50 | when you want to add some extra options to the command line or ignore |
| 51 | the default command line, you can supply some command-line options at |
| 52 | build time by entering them here. In other cases you can specify |
| 53 | kernel args so that you don't have to set them up in board prom |
| 54 | initialization routines. |
| 55 | |
| 56 | For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE |
| 57 | options. |
| 58 | |
| 59 | config CMDLINE_OVERRIDE |
| 60 | bool "Built-in command line overrides firware arguments" |
| 61 | default n |
| 62 | depends on CMDLINE_BOOL |
| 63 | help |
| 64 | By setting this option to 'Y' you will have your kernel ignore |
| 65 | command line arguments from firmware or second stage bootloader. |
| 66 | Instead, the built-in command line will be used exclusively. |
| 67 | |
| 68 | Normally, you will choose 'N' here. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
From: jiang.adam@gmail.com | 334c86c | 2010-08-27 18:32:06 +0900 | [diff] [blame] | 70 | config DEBUG_STACKOVERFLOW |
| 71 | bool "Check for stack overflows" |
| 72 | depends on DEBUG_KERNEL |
| 73 | help |
| 74 | This option will cause messages to be printed if free stack space |
| 75 | drops below a certain limit(2GB on MIPS). The debugging option |
| 76 | provides another way to check stack overflow happened on kernel mode |
| 77 | stack usually caused by nested interruption. |
| 78 | |
Ralf Baechle | 9349075a | 2007-07-05 17:39:48 +0100 | [diff] [blame] | 79 | config SMTC_IDLE_HOOK_DEBUG |
Ralf Baechle | c68644d | 2007-02-26 20:46:34 +0000 | [diff] [blame] | 80 | bool "Enable additional debug checks before going into CPU idle loop" |
| 81 | depends on DEBUG_KERNEL && MIPS_MT_SMTC |
| 82 | help |
| 83 | This option enables Enable additional debug checks before going into |
| 84 | CPU idle loop. For details on these checks, see |
| 85 | arch/mips/kernel/smtc.c. This debugging option result in significant |
| 86 | overhead so should be disabled in production kernels. |
| 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | config SB1XXX_CORELIS |
| 89 | bool "Corelis Debugger" |
| 90 | depends on SIBYTE_SB1xxx_SOC |
| 91 | select DEBUG_INFO |
| 92 | help |
| 93 | Select compile flags that produce code that can be processed by the |
| 94 | Corelis mksym utility and UDB Emulator. |
| 95 | |
| 96 | config RUNTIME_DEBUG |
| 97 | bool "Enable run-time debugging" |
| 98 | depends on DEBUG_KERNEL |
| 99 | help |
| 100 | If you say Y here, some debugging macros will do run-time checking. |
| 101 | If you say N here, those macros will mostly turn to no-ops. See |
Dmitri Vorobiev | 00ace20 | 2008-12-10 22:38:36 +0200 | [diff] [blame] | 102 | arch/mips/include/asm/debug.h for debugging macros. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | If unsure, say N. |
| 104 | |
Wu Zhangjin | f86a69b | 2010-01-31 20:39:40 +0800 | [diff] [blame] | 105 | config DEBUG_ZBOOT |
| 106 | bool "Enable compressed kernel support debugging" |
| 107 | depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT |
| 108 | default n |
| 109 | help |
| 110 | If you want to add compressed kernel support to a new board, and the |
| 111 | board supports uart16550 compatible serial port, please select |
| 112 | SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to |
| 113 | debug it. |
| 114 | |
| 115 | If your board doesn't support uart16550 compatible serial port, you |
| 116 | can try to select SYS_SUPPORTS_ZBOOT and use the other methods to |
| 117 | debug it. for example, add a new serial port support just as |
| 118 | arch/mips/boot/compressed/uart-16550.c does. |
| 119 | |
| 120 | After the compressed kernel support works, please disable this option |
| 121 | to reduce the kernel image size and speed up the booting procedure a |
| 122 | little. |
| 123 | |
David Daney | bba9076 | 2010-02-16 15:26:35 -0800 | [diff] [blame] | 124 | config SPINLOCK_TEST |
| 125 | bool "Enable spinlock timing tests in debugfs" |
| 126 | depends on DEBUG_FS |
| 127 | default n |
| 128 | help |
| 129 | Add several files to the debugfs to test spinlock speed. |
| 130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | endmenu |