Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 1 | menu "Kernel hacking" |
| 2 | |
| 3 | source "lib/Kconfig.debug" |
| 4 | |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 5 | config 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 | |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 12 | config 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 | |
Mike Kravetz | 57852a8 | 2006-09-06 16:23:12 -0700 | [diff] [blame] | 21 | config HCALL_STATS |
| 22 | bool "Hypervisor call instrumentation" |
| 23 | depends on PPC_PSERIES && DEBUG_FS |
| 24 | help |
| 25 | Adds code to keep track of the number of hypervisor calls made and |
| 26 | the amount of time spent in hypervisor callsr. Wall time spent in |
| 27 | each call is always calculated, and if available CPU cycles spent |
| 28 | are also calculated. A directory named hcall_inst is added at the |
| 29 | root of the debugfs filesystem. Within the hcall_inst directory |
| 30 | are files that contain CPU specific call statistics. |
| 31 | |
| 32 | This option will add a small amount of overhead to all hypervisor |
| 33 | calls. |
| 34 | |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 35 | config DEBUGGER |
| 36 | bool "Enable debugger hooks" |
| 37 | depends on DEBUG_KERNEL |
| 38 | help |
| 39 | Include in-kernel hooks for kernel debuggers. Unless you are |
| 40 | intending to debug the kernel, say N here. |
| 41 | |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 42 | config KGDB |
| 43 | bool "Include kgdb kernel debugger" |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 44 | depends on DEBUGGER && (BROKEN || PPC_GEN550 || 4xx) |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 45 | select DEBUG_INFO |
| 46 | help |
| 47 | Include in-kernel hooks for kgdb, the Linux kernel source level |
| 48 | debugger. See <http://kgdb.sourceforge.net/> for more information. |
| 49 | Unless you are intending to debug the kernel, say N here. |
| 50 | |
| 51 | choice |
| 52 | prompt "Serial Port" |
| 53 | depends on KGDB |
| 54 | default KGDB_TTYS1 |
| 55 | |
| 56 | config KGDB_TTYS0 |
| 57 | bool "ttyS0" |
| 58 | |
| 59 | config KGDB_TTYS1 |
| 60 | bool "ttyS1" |
| 61 | |
| 62 | config KGDB_TTYS2 |
| 63 | bool "ttyS2" |
| 64 | |
| 65 | config KGDB_TTYS3 |
| 66 | bool "ttyS3" |
| 67 | |
| 68 | endchoice |
| 69 | |
| 70 | config KGDB_CONSOLE |
| 71 | bool "Enable serial console thru kgdb port" |
| 72 | depends on KGDB && 8xx || CPM2 |
| 73 | help |
| 74 | If you enable this, all serial console messages will be sent |
| 75 | over the gdb stub. |
| 76 | If unsure, say N. |
| 77 | |
| 78 | config XMON |
| 79 | bool "Include xmon kernel debugger" |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 80 | depends on DEBUGGER && !PPC_ISERIES |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 81 | help |
| 82 | Include in-kernel hooks for the xmon kernel monitor/debugger. |
| 83 | Unless you are intending to debug the kernel, say N here. |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 84 | Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise |
| 85 | nothing will appear on the screen (xmon writes directly to the |
| 86 | framebuffer memory). |
| 87 | The cmdline option 'xmon' or 'xmon=early' will drop into xmon |
| 88 | very early during boot. 'xmon=on' will just enable the xmon |
| 89 | debugger hooks. 'xmon=off' will disable the debugger hooks |
| 90 | if CONFIG_XMON_DEFAULT is set. |
Olaf Hering | 26c8af5 | 2006-09-08 16:29:21 +0200 | [diff] [blame] | 91 | xmon will print a backtrace on the very first invocation. |
| 92 | 'xmon=nobt' will disable this autobacktrace. |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 93 | |
| 94 | config XMON_DEFAULT |
| 95 | bool "Enable xmon by default" |
| 96 | depends on XMON |
| 97 | help |
| 98 | xmon is normally disabled unless booted with 'xmon=on'. |
| 99 | Use 'xmon=off' to disable xmon init during runtime. |
| 100 | |
| 101 | config IRQSTACKS |
| 102 | bool "Use separate kernel stacks when processing interrupts" |
| 103 | depends on PPC64 |
| 104 | help |
| 105 | If you say Y here the kernel will use separate kernel stacks |
| 106 | for handling hard and soft interrupts. This can help avoid |
| 107 | overflowing the process kernel stacks. |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 108 | |
| 109 | config BDI_SWITCH |
| 110 | bool "Include BDI-2000 user context switcher" |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 111 | depends on DEBUG_KERNEL && PPC32 |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 112 | help |
| 113 | Include in-kernel support for the Abatron BDI2000 debugger. |
| 114 | Unless you are intending to debug the kernel with one of these |
| 115 | machines, say N here. |
| 116 | |
| 117 | config BOOTX_TEXT |
| 118 | bool "Support for early boot text console (BootX or OpenFirmware only)" |
Stephen Rothwell | eeb2d21 | 2005-09-30 17:24:15 +1000 | [diff] [blame] | 119 | depends PPC_OF && !PPC_ISERIES |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 120 | help |
| 121 | Say Y here to see progress messages from the boot firmware in text |
| 122 | mode. Requires either BootX or Open Firmware. |
| 123 | |
| 124 | config SERIAL_TEXT_DEBUG |
| 125 | bool "Support for early boot texts over serial port" |
| 126 | depends on 4xx || LOPEC || MV64X60 || PPLUS || PRPMC800 || \ |
| 127 | PPC_GEN550 || PPC_MPC52xx |
| 128 | |
Michael Ellerman | 485a2d5 | 2006-05-09 16:03:51 +1000 | [diff] [blame] | 129 | config PPC_EARLY_DEBUG |
| 130 | bool "Early debugging (dangerous)" |
| 131 | |
Michael Ellerman | 296167a | 2006-01-11 11:54:09 +1100 | [diff] [blame] | 132 | choice |
Michael Ellerman | 485a2d5 | 2006-05-09 16:03:51 +1000 | [diff] [blame] | 133 | prompt "Early debugging console" |
| 134 | depends on PPC_EARLY_DEBUG |
Michael Ellerman | 296167a | 2006-01-11 11:54:09 +1100 | [diff] [blame] | 135 | help |
Michael Ellerman | 485a2d5 | 2006-05-09 16:03:51 +1000 | [diff] [blame] | 136 | Use the selected console for early debugging. Careful, if you |
| 137 | enable debugging for the wrong type of machine your kernel |
| 138 | _will not boot_. |
Michael Ellerman | 296167a | 2006-01-11 11:54:09 +1100 | [diff] [blame] | 139 | |
| 140 | config PPC_EARLY_DEBUG_LPAR |
| 141 | bool "LPAR HV Console" |
| 142 | depends on PPC_PSERIES |
| 143 | help |
| 144 | Select this to enable early debugging for a machine with a HVC |
| 145 | console on vterm 0. |
| 146 | |
| 147 | config PPC_EARLY_DEBUG_G5 |
| 148 | bool "Apple G5" |
| 149 | depends on PPC_PMAC64 |
| 150 | help |
| 151 | Select this to enable early debugging for Apple G5 machines. |
| 152 | |
Michael Ellerman | cc46bb9 | 2006-06-23 18:20:16 +1000 | [diff] [blame] | 153 | config PPC_EARLY_DEBUG_RTAS_PANEL |
Michael Ellerman | 296167a | 2006-01-11 11:54:09 +1100 | [diff] [blame] | 154 | bool "RTAS Panel" |
| 155 | depends on PPC_RTAS |
| 156 | help |
| 157 | Select this to enable early debugging via the RTAS panel. |
| 158 | |
Michael Ellerman | cc46bb9 | 2006-06-23 18:20:16 +1000 | [diff] [blame] | 159 | config PPC_EARLY_DEBUG_RTAS_CONSOLE |
| 160 | bool "RTAS Console" |
| 161 | depends on PPC_RTAS |
| 162 | select UDBG_RTAS_CONSOLE |
| 163 | help |
| 164 | Select this to enable early debugging via the RTAS console. |
| 165 | |
Michael Ellerman | 296167a | 2006-01-11 11:54:09 +1100 | [diff] [blame] | 166 | config PPC_EARLY_DEBUG_MAPLE |
| 167 | bool "Maple real mode" |
| 168 | depends on PPC_MAPLE |
| 169 | help |
| 170 | Select this to enable early debugging for Maple. |
| 171 | |
| 172 | config PPC_EARLY_DEBUG_ISERIES |
| 173 | bool "iSeries HV Console" |
| 174 | depends on PPC_ISERIES |
| 175 | help |
| 176 | Select this to enable early debugging for legacy iSeries. You need |
| 177 | to hit "Ctrl-x Ctrl-x" to see the messages on the console. |
| 178 | |
| 179 | endchoice |
| 180 | |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 181 | endmenu |