1menu "Kernel hacking" 2 3source "lib/Kconfig.debug" 4 5config DEBUG_STACKOVERFLOW 6 bool "Check for stack overflows" 7 depends on DEBUG_KERNEL && PPC64 8 help 9 This option will cause messages to be printed if free stack space 10 drops below a certain limit. 11 12config DEBUG_STACK_USAGE 13 bool "Stack utilization instrumentation" 14 depends on DEBUG_KERNEL && PPC64 15 help 16 Enables the display of the minimum amount of free stack which each 17 task has ever had available in the sysrq-T and sysrq-P debug output. 18 19 This option will slow down process creation somewhat. 20 21config DEBUGGER 22 bool "Enable debugger hooks" 23 depends on DEBUG_KERNEL 24 help 25 Include in-kernel hooks for kernel debuggers. Unless you are 26 intending to debug the kernel, say N here. 27 28config KGDB 29 bool "Include kgdb kernel debugger" 30 depends on DEBUGGER && (BROKEN || PPC_GEN550 || 4xx) 31 select DEBUG_INFO 32 help 33 Include in-kernel hooks for kgdb, the Linux kernel source level 34 debugger. See <http://kgdb.sourceforge.net/> for more information. 35 Unless you are intending to debug the kernel, say N here. 36 37choice 38 prompt "Serial Port" 39 depends on KGDB 40 default KGDB_TTYS1 41 42config KGDB_TTYS0 43 bool "ttyS0" 44 45config KGDB_TTYS1 46 bool "ttyS1" 47 48config KGDB_TTYS2 49 bool "ttyS2" 50 51config KGDB_TTYS3 52 bool "ttyS3" 53 54endchoice 55 56config KGDB_CONSOLE 57 bool "Enable serial console thru kgdb port" 58 depends on KGDB && 8xx || CPM2 59 help 60 If you enable this, all serial console messages will be sent 61 over the gdb stub. 62 If unsure, say N. 63 64config XMON 65 bool "Include xmon kernel debugger" 66 depends on DEBUGGER && !PPC_ISERIES 67 help 68 Include in-kernel hooks for the xmon kernel monitor/debugger. 69 Unless you are intending to debug the kernel, say N here. 70 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise 71 nothing will appear on the screen (xmon writes directly to the 72 framebuffer memory). 73 The cmdline option 'xmon' or 'xmon=early' will drop into xmon 74 very early during boot. 'xmon=on' will just enable the xmon 75 debugger hooks. 'xmon=off' will disable the debugger hooks 76 if CONFIG_XMON_DEFAULT is set. 77 78config XMON_DEFAULT 79 bool "Enable xmon by default" 80 depends on XMON 81 help 82 xmon is normally disabled unless booted with 'xmon=on'. 83 Use 'xmon=off' to disable xmon init during runtime. 84 85config IRQSTACKS 86 bool "Use separate kernel stacks when processing interrupts" 87 depends on PPC64 88 help 89 If you say Y here the kernel will use separate kernel stacks 90 for handling hard and soft interrupts. This can help avoid 91 overflowing the process kernel stacks. 92 93config BDI_SWITCH 94 bool "Include BDI-2000 user context switcher" 95 depends on DEBUG_KERNEL && PPC32 96 help 97 Include in-kernel support for the Abatron BDI2000 debugger. 98 Unless you are intending to debug the kernel with one of these 99 machines, say N here. 100 101config BOOTX_TEXT 102 bool "Support for early boot text console (BootX or OpenFirmware only)" 103 depends PPC_OF && !PPC_ISERIES 104 help 105 Say Y here to see progress messages from the boot firmware in text 106 mode. Requires either BootX or Open Firmware. 107 108config SERIAL_TEXT_DEBUG 109 bool "Support for early boot texts over serial port" 110 depends on 4xx || LOPEC || MV64X60 || PPLUS || PRPMC800 || \ 111 PPC_GEN550 || PPC_MPC52xx 112 113choice 114 prompt "Early debugging (dangerous)" 115 bool 116 optional 117 help 118 Enable early debugging. Careful, if you enable debugging for the 119 wrong type of machine your kernel _will not boot_. 120 121config PPC_EARLY_DEBUG_LPAR 122 bool "LPAR HV Console" 123 depends on PPC_PSERIES 124 help 125 Select this to enable early debugging for a machine with a HVC 126 console on vterm 0. 127 128config PPC_EARLY_DEBUG_G5 129 bool "Apple G5" 130 depends on PPC_PMAC64 131 help 132 Select this to enable early debugging for Apple G5 machines. 133 134config PPC_EARLY_DEBUG_RTAS 135 bool "RTAS Panel" 136 depends on PPC_RTAS 137 help 138 Select this to enable early debugging via the RTAS panel. 139 140config PPC_EARLY_DEBUG_MAPLE 141 bool "Maple real mode" 142 depends on PPC_MAPLE 143 help 144 Select this to enable early debugging for Maple. 145 146config PPC_EARLY_DEBUG_ISERIES 147 bool "iSeries HV Console" 148 depends on PPC_ISERIES 149 help 150 Select this to enable early debugging for legacy iSeries. You need 151 to hit "Ctrl-x Ctrl-x" to see the messages on the console. 152 153endchoice 154 155endmenu 156