3 config TRACE_IRQFLAGS_SUPPORT
7 source "lib/Kconfig.debug"
10 bool "Early printk" if EMBEDDED
11 depends on SYS_HAS_EARLY_PRINTK
14 This option enables special console drivers which allow the kernel
15 to print messages very early in the bootup process.
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.
24 bool "Built-in kernel command line"
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
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.
40 Most MIPS systems will normally expect 'N' here and rely upon
41 the command line from the firmware or the second-stage bootloader.
44 string "Default kernel command string"
45 depends on CMDLINE_BOOL
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.
56 For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE
59 config CMDLINE_OVERRIDE
60 bool "Built-in command line overrides firware arguments"
62 depends on CMDLINE_BOOL
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.
68 Normally, you will choose 'N' here.
70 config DEBUG_STACKOVERFLOW
71 bool "Check for stack overflows"
72 depends on DEBUG_KERNEL
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.
79 config DEBUG_STACK_USAGE
80 bool "Enable stack utilization instrumentation"
81 depends on DEBUG_KERNEL
83 Enables the display of the minimum amount of free stack which each
84 task has ever had available in the sysrq-T and sysrq-P debug output.
86 This option will slow down process creation somewhat.
88 config SMTC_IDLE_HOOK_DEBUG
89 bool "Enable additional debug checks before going into CPU idle loop"
90 depends on DEBUG_KERNEL && MIPS_MT_SMTC
92 This option enables Enable additional debug checks before going into
93 CPU idle loop. For details on these checks, see
94 arch/mips/kernel/smtc.c. This debugging option result in significant
95 overhead so should be disabled in production kernels.
98 bool "Corelis Debugger"
99 depends on SIBYTE_SB1xxx_SOC
102 Select compile flags that produce code that can be processed by the
103 Corelis mksym utility and UDB Emulator.
106 bool "Enable run-time debugging"
107 depends on DEBUG_KERNEL
109 If you say Y here, some debugging macros will do run-time checking.
110 If you say N here, those macros will mostly turn to no-ops. See
111 arch/mips/include/asm/debug.h for debugging macros.
115 bool "Enable compressed kernel support debugging"
116 depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT
119 If you want to add compressed kernel support to a new board, and the
120 board supports uart16550 compatible serial port, please select
121 SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to
124 If your board doesn't support uart16550 compatible serial port, you
125 can try to select SYS_SUPPORTS_ZBOOT and use the other methods to
126 debug it. for example, add a new serial port support just as
127 arch/mips/boot/compressed/uart-16550.c does.
129 After the compressed kernel support works, please disable this option
130 to reduce the kernel image size and speed up the booting procedure a
134 bool "Enable spinlock timing tests in debugfs"
138 Add several files to the debugfs to test spinlock speed.