menu "Kernel hacking" source "lib/Kconfig.debug" config DEBUG_STACKOVERFLOW	bool "Check for stack overflows"	depends on DEBUG_KERNEL	help	  This option will cause messages to be printed if free stack space	  drops below a certain limit. config DEBUG_STACK_USAGE	bool "Stack utilization instrumentation"	depends on DEBUG_KERNEL	help	  Enables the display of the minimum amount of free stack which each	  task has ever had available in the sysrq-T and sysrq-P debug output. 	  This option will slow down process creation somewhat. config HCALL_STATS	bool "Hypervisor call instrumentation"	depends on PPC_PSERIES && DEBUG_FS	help	  Adds code to keep track of the number of hypervisor calls made and	  the amount of time spent in hypervisor callsr.  Wall time spent in	  each call is always calculated, and if available CPU cycles spent	  are also calculated.  A directory named hcall_inst is added at the	  root of the debugfs filesystem.  Within the hcall_inst directory	  are files that contain CPU specific call statistics. 	  This option will add a small amount of overhead to all hypervisor	  calls. config DEBUGGER	bool "Enable debugger hooks"	depends on DEBUG_KERNEL	help	  Include in-kernel hooks for kernel debuggers. Unless you are	  intending to debug the kernel, say N here. config KGDB	bool "Include kgdb kernel debugger"	depends on DEBUGGER && (BROKEN || PPC_GEN550 || 4xx)	select DEBUG_INFO	help	  Include in-kernel hooks for kgdb, the Linux kernel source level	  debugger.  See <http://kgdb.sourceforge.net/> for more information.	  Unless you are intending to debug the kernel, say N here. choice	prompt "Serial Port"	depends on KGDB	default KGDB_TTYS1 config KGDB_TTYS0	bool "ttyS0" config KGDB_TTYS1	bool "ttyS1" config KGDB_TTYS2	bool "ttyS2" config KGDB_TTYS3	bool "ttyS3" endchoice config KGDB_CONSOLE	bool "Enable serial console thru kgdb port"	depends on KGDB && 8xx || CPM2	help	  If you enable this, all serial console messages will be sent	  over the gdb stub.	  If unsure, say N. config XMON	bool "Include xmon kernel debugger"	depends on DEBUGGER	help	  Include in-kernel hooks for the xmon kernel monitor/debugger.	  Unless you are intending to debug the kernel, say N here.	  Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise	  nothing will appear on the screen (xmon writes directly to the	  framebuffer memory).	  The cmdline option 'xmon' or 'xmon=early' will drop into xmon	  very early during boot. 'xmon=on' will just enable the xmon	  debugger hooks.  'xmon=off' will disable the debugger hooks	  if CONFIG_XMON_DEFAULT is set.	  xmon will print a backtrace on the very first invocation.	  'xmon=nobt' will disable this autobacktrace. config XMON_DEFAULT	bool "Enable xmon by default"	depends on XMON	help	  xmon is normally disabled unless booted with 'xmon=on'.	  Use 'xmon=off' to disable xmon init during runtime. config XMON_DISASSEMBLY	bool "Include disassembly support in xmon"	depends on XMON	default y	help	  Include support for disassembling in xmon. You probably want	  to say Y here, unless you're building for a memory-constrained	  system. config IRQSTACKS	bool "Use separate kernel stacks when processing interrupts"	depends on PPC64	help	  If you say Y here the kernel will use separate kernel stacks	  for handling hard and soft interrupts.  This can help avoid	  overflowing the process kernel stacks. config BDI_SWITCH	bool "Include BDI-2000 user context switcher"	depends on DEBUG_KERNEL && PPC32	help	  Include in-kernel support for the Abatron BDI2000 debugger.	  Unless you are intending to debug the kernel with one of these	  machines, say N here. config BOOTX_TEXT	bool "Support for early boot text console (BootX or OpenFirmware only)"	depends PPC_OF	help	  Say Y here to see progress messages from the boot firmware in text	  mode. Requires either BootX or Open Firmware. config SERIAL_TEXT_DEBUG	bool "Support for early boot texts over serial port"	depends on 4xx || LOPEC || MV64X60 || PPLUS || PRPMC800 || \		PPC_GEN550 || PPC_MPC52xx config PPC_EARLY_DEBUG	bool "Early debugging (dangerous)" choice	prompt "Early debugging console"	depends on PPC_EARLY_DEBUG	help	  Use the selected console for early debugging. Careful, if you	  enable debugging for the wrong type of machine your kernel	  _will not boot_. config PPC_EARLY_DEBUG_LPAR	bool "LPAR HV Console"	depends on PPC_PSERIES	help	  Select this to enable early debugging for a machine with a HVC	  console on vterm 0. config PPC_EARLY_DEBUG_G5	bool "Apple G5"	depends on PPC_PMAC64	help	  Select this to enable early debugging for Apple G5 machines. config PPC_EARLY_DEBUG_RTAS_PANEL	bool "RTAS Panel"	depends on PPC_RTAS	help	  Select this to enable early debugging via the RTAS panel. config PPC_EARLY_DEBUG_RTAS_CONSOLE	bool "RTAS Console"	depends on PPC_RTAS	select UDBG_RTAS_CONSOLE	help	  Select this to enable early debugging via the RTAS console. config PPC_EARLY_DEBUG_MAPLE	bool "Maple real mode"	depends on PPC_MAPLE	help	  Select this to enable early debugging for Maple. config PPC_EARLY_DEBUG_ISERIES	bool "iSeries HV Console"	depends on PPC_ISERIES	help	  Select this to enable early debugging for legacy iSeries. You need	  to hit "Ctrl-x Ctrl-x" to see the messages on the console. config PPC_EARLY_DEBUG_PAS_REALMODE	bool "PA Semi real mode"	depends on PPC_PASEMI	help	  Select this to enable early debugging for PA Semi.	  Output will be on UART0. config PPC_EARLY_DEBUG_BEAT	bool "Beat HV Console"	depends on PPC_CELLEB	select PPC_UDBG_BEAT	help	  Select this to enable early debugging for Celleb with Beat. endchoice endmenu