| 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 DEBUG_PAGEALLOC |
| bool "Debug page memory allocations" |
| depends on DEBUG_KERNEL && !SOFTWARE_SUSPEND |
| help |
| Unmap pages from the kernel linear mapping after free_pages(). |
| This results in a large slowdown, but helps to find certain types |
| of memory corruptions. |
| |
| |
| 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 calls. 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 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. |
| |
| config PPC_EARLY_DEBUG_44x |
| bool "Early serial debugging for IBM/AMCC 44x CPUs" |
| depends on 44x |
| select PPC_UDBG_16550 |
| help |
| Select this to enable early debugging for IBM 44x chips via the |
| inbuilt serial port. |
| |
| endchoice |
| |
| config PPC_EARLY_DEBUG_44x_PHYSLOW |
| hex "Low 32 bits of early debug UART physical address" |
| depends PPC_EARLY_DEBUG_44x |
| default "0x40000200" |
| |
| config PPC_EARLY_DEBUG_44x_PHYSHIGH |
| hex "EPRN of early debug UART physical address" |
| depends PPC_EARLY_DEBUG_44x |
| default "0x1" |
| |
| endmenu |