Root/
1 | menu "Kernel hacking" |
2 | |
3 | config TRACE_IRQFLAGS_SUPPORT |
4 | bool |
5 | default y |
6 | |
7 | source "lib/Kconfig.debug" |
8 | |
9 | config EARLY_PRINTK |
10 | bool "Early printk" if EMBEDDED |
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 | |
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 | |
43 | config CMDLINE |
44 | string "Default kernel command string" |
45 | depends on CMDLINE_BOOL |
46 | default "" |
47 | help |
48 | On some platforms, there is currently no way for the boot loader to |
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. |
69 | |
70 | config DEBUG_STACK_USAGE |
71 | bool "Enable stack utilization instrumentation" |
72 | depends on DEBUG_KERNEL |
73 | help |
74 | Enables the display of the minimum amount of free stack which each |
75 | task has ever had available in the sysrq-T and sysrq-P debug output. |
76 | |
77 | This option will slow down process creation somewhat. |
78 | |
79 | config SMTC_IDLE_HOOK_DEBUG |
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 | |
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 |
102 | arch/mips/include/asm/debug.h for debugging macros. |
103 | If unsure, say N. |
104 | |
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 | |
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 | |
131 | endmenu |
132 |
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