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" |
Kumar Gala | 304df8f | 2007-01-30 00:45:56 -0600 | [diff] [blame] | 7 | depends on DEBUG_KERNEL |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 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" |
Kumar Gala | 304df8f | 2007-01-30 00:45:56 -0600 | [diff] [blame] | 14 | depends on DEBUG_KERNEL |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 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 | |
Benjamin Herrenschmidt | 88df6e9 | 2007-04-12 15:30:22 +1000 | [diff] [blame] | 21 | config DEBUG_PAGEALLOC |
| 22 | bool "Debug page memory allocations" |
Rafael J. Wysocki | b0cb1a1 | 2007-07-29 23:24:36 +0200 | [diff] [blame] | 23 | depends on DEBUG_KERNEL && !HIBERNATION |
Benjamin Herrenschmidt | 88df6e9 | 2007-04-12 15:30:22 +1000 | [diff] [blame] | 24 | help |
| 25 | Unmap pages from the kernel linear mapping after free_pages(). |
| 26 | This results in a large slowdown, but helps to find certain types |
| 27 | of memory corruptions. |
| 28 | |
| 29 | |
Mike Kravetz | 57852a8 | 2006-09-06 16:23:12 -0700 | [diff] [blame] | 30 | config HCALL_STATS |
| 31 | bool "Hypervisor call instrumentation" |
| 32 | depends on PPC_PSERIES && DEBUG_FS |
| 33 | help |
| 34 | Adds code to keep track of the number of hypervisor calls made and |
David Sterba | 3dde6ad | 2007-05-09 07:12:20 +0200 | [diff] [blame] | 35 | the amount of time spent in hypervisor calls. Wall time spent in |
Mike Kravetz | 57852a8 | 2006-09-06 16:23:12 -0700 | [diff] [blame] | 36 | each call is always calculated, and if available CPU cycles spent |
| 37 | are also calculated. A directory named hcall_inst is added at the |
| 38 | root of the debugfs filesystem. Within the hcall_inst directory |
| 39 | are files that contain CPU specific call statistics. |
| 40 | |
| 41 | This option will add a small amount of overhead to all hypervisor |
| 42 | calls. |
| 43 | |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 44 | config DEBUGGER |
| 45 | bool "Enable debugger hooks" |
| 46 | depends on DEBUG_KERNEL |
| 47 | help |
| 48 | Include in-kernel hooks for kernel debuggers. Unless you are |
| 49 | intending to debug the kernel, say N here. |
| 50 | |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 51 | config KGDB |
| 52 | bool "Include kgdb kernel debugger" |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 53 | depends on DEBUGGER && (BROKEN || PPC_GEN550 || 4xx) |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 54 | select DEBUG_INFO |
| 55 | help |
| 56 | Include in-kernel hooks for kgdb, the Linux kernel source level |
| 57 | debugger. See <http://kgdb.sourceforge.net/> for more information. |
| 58 | Unless you are intending to debug the kernel, say N here. |
| 59 | |
Michael Ellerman | ae0dc73 | 2008-06-24 11:32:32 +1000 | [diff] [blame] | 60 | config CODE_PATCHING_SELFTEST |
| 61 | bool "Run self-tests of the code-patching code." |
| 62 | depends on DEBUG_KERNEL |
| 63 | default n |
| 64 | |
Michael Ellerman | 362e770 | 2008-06-24 11:33:03 +1000 | [diff] [blame] | 65 | config FTR_FIXUP_SELFTEST |
| 66 | bool "Run self-tests of the feature-fixup code." |
| 67 | depends on DEBUG_KERNEL |
| 68 | default n |
| 69 | |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 70 | choice |
| 71 | prompt "Serial Port" |
| 72 | depends on KGDB |
| 73 | default KGDB_TTYS1 |
| 74 | |
| 75 | config KGDB_TTYS0 |
| 76 | bool "ttyS0" |
| 77 | |
| 78 | config KGDB_TTYS1 |
| 79 | bool "ttyS1" |
| 80 | |
| 81 | config KGDB_TTYS2 |
| 82 | bool "ttyS2" |
| 83 | |
| 84 | config KGDB_TTYS3 |
| 85 | bool "ttyS3" |
| 86 | |
| 87 | endchoice |
| 88 | |
| 89 | config KGDB_CONSOLE |
| 90 | bool "Enable serial console thru kgdb port" |
| 91 | depends on KGDB && 8xx || CPM2 |
| 92 | help |
| 93 | If you enable this, all serial console messages will be sent |
| 94 | over the gdb stub. |
| 95 | If unsure, say N. |
| 96 | |
| 97 | config XMON |
| 98 | bool "Include xmon kernel debugger" |
Stephen Rothwell | bbb6817 | 2006-11-30 11:44:09 +1100 | [diff] [blame] | 99 | depends on DEBUGGER |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 100 | help |
| 101 | Include in-kernel hooks for the xmon kernel monitor/debugger. |
| 102 | Unless you are intending to debug the kernel, say N here. |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 103 | Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise |
| 104 | nothing will appear on the screen (xmon writes directly to the |
| 105 | framebuffer memory). |
| 106 | The cmdline option 'xmon' or 'xmon=early' will drop into xmon |
| 107 | very early during boot. 'xmon=on' will just enable the xmon |
| 108 | debugger hooks. 'xmon=off' will disable the debugger hooks |
| 109 | if CONFIG_XMON_DEFAULT is set. |
Olaf Hering | 26c8af5 | 2006-09-08 16:29:21 +0200 | [diff] [blame] | 110 | xmon will print a backtrace on the very first invocation. |
| 111 | 'xmon=nobt' will disable this autobacktrace. |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 112 | |
| 113 | config XMON_DEFAULT |
| 114 | bool "Enable xmon by default" |
| 115 | depends on XMON |
| 116 | help |
| 117 | xmon is normally disabled unless booted with 'xmon=on'. |
| 118 | Use 'xmon=off' to disable xmon init during runtime. |
| 119 | |
Michael Ellerman | e042604 | 2006-11-23 00:46:45 +0100 | [diff] [blame] | 120 | config XMON_DISASSEMBLY |
| 121 | bool "Include disassembly support in xmon" |
| 122 | depends on XMON |
| 123 | default y |
| 124 | help |
| 125 | Include support for disassembling in xmon. You probably want |
| 126 | to say Y here, unless you're building for a memory-constrained |
| 127 | system. |
| 128 | |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 129 | config IRQSTACKS |
| 130 | bool "Use separate kernel stacks when processing interrupts" |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 131 | help |
| 132 | If you say Y here the kernel will use separate kernel stacks |
| 133 | for handling hard and soft interrupts. This can help avoid |
| 134 | overflowing the process kernel stacks. |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 135 | |
Michael Ellerman | 60b332e | 2007-08-28 18:47:57 +1000 | [diff] [blame] | 136 | config VIRQ_DEBUG |
| 137 | bool "Expose hardware/virtual IRQ mapping via debugfs" |
| 138 | depends on DEBUG_FS && PPC_MERGE |
| 139 | help |
| 140 | This option will show the mapping relationship between hardware irq |
| 141 | numbers and virtual irq numbers. The mapping is exposed via debugfs |
| 142 | in the file powerpc/virq_mapping. |
| 143 | |
| 144 | If you don't know what this means you don't need it. |
| 145 | |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 146 | config BDI_SWITCH |
| 147 | bool "Include BDI-2000 user context switcher" |
Paul Mackerras | ff64208 | 2005-10-10 22:15:52 +1000 | [diff] [blame] | 148 | depends on DEBUG_KERNEL && PPC32 |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 149 | help |
| 150 | Include in-kernel support for the Abatron BDI2000 debugger. |
| 151 | Unless you are intending to debug the kernel with one of these |
| 152 | machines, say N here. |
| 153 | |
| 154 | config BOOTX_TEXT |
| 155 | bool "Support for early boot text console (BootX or OpenFirmware only)" |
Adrian Bunk | 247537b | 2007-09-26 20:02:52 +0200 | [diff] [blame] | 156 | depends on PPC_OF && PPC_MULTIPLATFORM |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 157 | help |
| 158 | Say Y here to see progress messages from the boot firmware in text |
| 159 | mode. Requires either BootX or Open Firmware. |
| 160 | |
Michael Ellerman | 485a2d5 | 2006-05-09 16:03:51 +1000 | [diff] [blame] | 161 | config PPC_EARLY_DEBUG |
| 162 | bool "Early debugging (dangerous)" |
Hollis Blanchard | bbf45ba | 2008-04-16 23:28:09 -0500 | [diff] [blame] | 163 | # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water |
| 164 | # mark, which doesn't work with current 440 KVM. |
| 165 | depends on !KVM |
Benjamin Herrenschmidt | 7ee1746 | 2007-12-11 14:48:24 +1100 | [diff] [blame] | 166 | help |
| 167 | Say Y to enable some early debugging facilities that may be available |
| 168 | for your processor/board combination. Those facilities are hacks |
| 169 | intended to debug problems early during boot, this should not be |
| 170 | enabled in a production kernel. |
| 171 | Note that enabling this will also cause the kernel default log level |
| 172 | to be pushed to max automatically very early during boot |
Michael Ellerman | 485a2d5 | 2006-05-09 16:03:51 +1000 | [diff] [blame] | 173 | |
Michael Ellerman | 296167a | 2006-01-11 11:54:09 +1100 | [diff] [blame] | 174 | choice |
Michael Ellerman | 485a2d5 | 2006-05-09 16:03:51 +1000 | [diff] [blame] | 175 | prompt "Early debugging console" |
| 176 | depends on PPC_EARLY_DEBUG |
Michael Ellerman | 296167a | 2006-01-11 11:54:09 +1100 | [diff] [blame] | 177 | help |
Michael Ellerman | 485a2d5 | 2006-05-09 16:03:51 +1000 | [diff] [blame] | 178 | Use the selected console for early debugging. Careful, if you |
| 179 | enable debugging for the wrong type of machine your kernel |
| 180 | _will not boot_. |
Michael Ellerman | 296167a | 2006-01-11 11:54:09 +1100 | [diff] [blame] | 181 | |
| 182 | config PPC_EARLY_DEBUG_LPAR |
| 183 | bool "LPAR HV Console" |
| 184 | depends on PPC_PSERIES |
| 185 | help |
| 186 | Select this to enable early debugging for a machine with a HVC |
| 187 | console on vterm 0. |
| 188 | |
| 189 | config PPC_EARLY_DEBUG_G5 |
| 190 | bool "Apple G5" |
| 191 | depends on PPC_PMAC64 |
| 192 | help |
| 193 | Select this to enable early debugging for Apple G5 machines. |
| 194 | |
Michael Ellerman | cc46bb9 | 2006-06-23 18:20:16 +1000 | [diff] [blame] | 195 | config PPC_EARLY_DEBUG_RTAS_PANEL |
Michael Ellerman | 296167a | 2006-01-11 11:54:09 +1100 | [diff] [blame] | 196 | bool "RTAS Panel" |
| 197 | depends on PPC_RTAS |
| 198 | help |
| 199 | Select this to enable early debugging via the RTAS panel. |
| 200 | |
Michael Ellerman | cc46bb9 | 2006-06-23 18:20:16 +1000 | [diff] [blame] | 201 | config PPC_EARLY_DEBUG_RTAS_CONSOLE |
| 202 | bool "RTAS Console" |
| 203 | depends on PPC_RTAS |
| 204 | select UDBG_RTAS_CONSOLE |
| 205 | help |
| 206 | Select this to enable early debugging via the RTAS console. |
| 207 | |
Michael Ellerman | 296167a | 2006-01-11 11:54:09 +1100 | [diff] [blame] | 208 | config PPC_EARLY_DEBUG_MAPLE |
| 209 | bool "Maple real mode" |
| 210 | depends on PPC_MAPLE |
| 211 | help |
| 212 | Select this to enable early debugging for Maple. |
| 213 | |
| 214 | config PPC_EARLY_DEBUG_ISERIES |
| 215 | bool "iSeries HV Console" |
| 216 | depends on PPC_ISERIES |
| 217 | help |
| 218 | Select this to enable early debugging for legacy iSeries. You need |
| 219 | to hit "Ctrl-x Ctrl-x" to see the messages on the console. |
| 220 | |
Olof Johansson | 39c870d | 2007-02-04 16:36:49 -0600 | [diff] [blame] | 221 | config PPC_EARLY_DEBUG_PAS_REALMODE |
| 222 | bool "PA Semi real mode" |
| 223 | depends on PPC_PASEMI |
| 224 | help |
| 225 | Select this to enable early debugging for PA Semi. |
| 226 | Output will be on UART0. |
| 227 | |
Ishizaki Kou | c347b79 | 2007-02-02 16:47:17 +0900 | [diff] [blame] | 228 | config PPC_EARLY_DEBUG_BEAT |
| 229 | bool "Beat HV Console" |
| 230 | depends on PPC_CELLEB |
| 231 | select PPC_UDBG_BEAT |
| 232 | help |
| 233 | Select this to enable early debugging for Celleb with Beat. |
| 234 | |
David Gibson | d9b55a0 | 2007-05-08 12:59:31 +1000 | [diff] [blame] | 235 | config PPC_EARLY_DEBUG_44x |
| 236 | bool "Early serial debugging for IBM/AMCC 44x CPUs" |
| 237 | depends on 44x |
David Gibson | d9b55a0 | 2007-05-08 12:59:31 +1000 | [diff] [blame] | 238 | help |
| 239 | Select this to enable early debugging for IBM 44x chips via the |
Hugh Blemings | 6bbc547 | 2007-12-21 15:39:28 +1100 | [diff] [blame] | 240 | inbuilt serial port. If you enable this, ensure you set |
| 241 | PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. |
David Gibson | d9b55a0 | 2007-05-08 12:59:31 +1000 | [diff] [blame] | 242 | |
Benjamin Herrenschmidt | 9dae8af | 2007-12-21 15:39:26 +1100 | [diff] [blame] | 243 | config PPC_EARLY_DEBUG_40x |
| 244 | bool "Early serial debugging for IBM/AMCC 40x CPUs" |
| 245 | depends on 40x |
| 246 | help |
| 247 | Select this to enable early debugging for IBM 40x chips via the |
| 248 | inbuilt serial port. This works on chips with a 16550 compatible |
| 249 | UART. Xilinx chips with uartlite cannot use this option. |
| 250 | |
Scott Wood | c374e00 | 2007-07-16 11:43:43 -0500 | [diff] [blame] | 251 | config PPC_EARLY_DEBUG_CPM |
| 252 | bool "Early serial debugging for Freescale CPM-based serial ports" |
| 253 | depends on SERIAL_CPM |
| 254 | select PIN_TLB if PPC_8xx |
| 255 | help |
| 256 | Select this to enable early debugging for Freescale chips |
| 257 | using a CPM-based serial port. This assumes that the bootwrapper |
| 258 | has run, and set up the CPM in a particular way. |
| 259 | |
Michael Ellerman | 296167a | 2006-01-11 11:54:09 +1100 | [diff] [blame] | 260 | endchoice |
| 261 | |
David Gibson | d9b55a0 | 2007-05-08 12:59:31 +1000 | [diff] [blame] | 262 | config PPC_EARLY_DEBUG_44x_PHYSLOW |
| 263 | hex "Low 32 bits of early debug UART physical address" |
Adrian Bunk | 247537b | 2007-09-26 20:02:52 +0200 | [diff] [blame] | 264 | depends on PPC_EARLY_DEBUG_44x |
David Gibson | d9b55a0 | 2007-05-08 12:59:31 +1000 | [diff] [blame] | 265 | default "0x40000200" |
Hugh Blemings | 6bbc547 | 2007-12-21 15:39:28 +1100 | [diff] [blame] | 266 | help |
| 267 | You probably want 0x40000200 for ebony boards and |
| 268 | 0x40000300 for taishan |
David Gibson | d9b55a0 | 2007-05-08 12:59:31 +1000 | [diff] [blame] | 269 | |
| 270 | config PPC_EARLY_DEBUG_44x_PHYSHIGH |
| 271 | hex "EPRN of early debug UART physical address" |
Adrian Bunk | 247537b | 2007-09-26 20:02:52 +0200 | [diff] [blame] | 272 | depends on PPC_EARLY_DEBUG_44x |
David Gibson | d9b55a0 | 2007-05-08 12:59:31 +1000 | [diff] [blame] | 273 | default "0x1" |
| 274 | |
Benjamin Herrenschmidt | 9dae8af | 2007-12-21 15:39:26 +1100 | [diff] [blame] | 275 | config PPC_EARLY_DEBUG_40x_PHYSADDR |
| 276 | hex "Early debug UART physical address" |
| 277 | depends on PPC_EARLY_DEBUG_40x |
| 278 | default "0xef600300" |
| 279 | |
Scott Wood | c374e00 | 2007-07-16 11:43:43 -0500 | [diff] [blame] | 280 | config PPC_EARLY_DEBUG_CPM_ADDR |
| 281 | hex "CPM UART early debug transmit descriptor address" |
| 282 | depends on PPC_EARLY_DEBUG_CPM |
Scott Wood | 15f8c60 | 2007-09-28 14:06:16 -0500 | [diff] [blame] | 283 | default "0xfa202008" if PPC_EP88XC |
Laurent Pinchart | c2dd352 | 2008-04-10 17:01:59 +0200 | [diff] [blame] | 284 | default "0xf0001ff8" if CPM2 |
Scott Wood | 15f8c60 | 2007-09-28 14:06:16 -0500 | [diff] [blame] | 285 | default "0xff002008" if CPM1 |
Scott Wood | c374e00 | 2007-07-16 11:43:43 -0500 | [diff] [blame] | 286 | help |
| 287 | This specifies the address of the transmit descriptor |
| 288 | used for early debug output. Because it is needed before |
| 289 | platform probing is done, all platforms selected must |
| 290 | share the same address. |
| 291 | |
Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame] | 292 | endmenu |