| 1 | menu "Kernel hacking" |
| 2 | |
| 3 | source "lib/Kconfig.debug" |
| 4 | |
| 5 | config PPC_DISABLE_WERROR |
| 6 | bool "Don't build arch/powerpc code with -Werror" |
| 7 | default n |
| 8 | help |
| 9 | This option tells the compiler NOT to build the code under |
| 10 | arch/powerpc with the -Werror flag (which means warnings |
| 11 | are treated as errors). |
| 12 | |
| 13 | Only enable this if you are hitting a build failure in the |
| 14 | arch/powerpc code caused by a warning, and you don't feel |
| 15 | inclined to fix it. |
| 16 | |
| 17 | config PPC_WERROR |
| 18 | bool |
| 19 | depends on !PPC_DISABLE_WERROR |
| 20 | default y |
| 21 | |
| 22 | config PRINT_STACK_DEPTH |
| 23 | int "Stack depth to print" if DEBUG_KERNEL |
| 24 | default 64 |
| 25 | help |
| 26 | This option allows you to set the stack depth that the kernel |
| 27 | prints in stack traces. This can be useful if your display is |
| 28 | too small and stack traces cause important information to |
| 29 | scroll off the screen. |
| 30 | |
| 31 | config DEBUG_STACKOVERFLOW |
| 32 | bool "Check for stack overflows" |
| 33 | depends on DEBUG_KERNEL |
| 34 | help |
| 35 | This option will cause messages to be printed if free stack space |
| 36 | drops below a certain limit. |
| 37 | |
| 38 | config HCALL_STATS |
| 39 | bool "Hypervisor call instrumentation" |
| 40 | depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS |
| 41 | help |
| 42 | Adds code to keep track of the number of hypervisor calls made and |
| 43 | the amount of time spent in hypervisor calls. Wall time spent in |
| 44 | each call is always calculated, and if available CPU cycles spent |
| 45 | are also calculated. A directory named hcall_inst is added at the |
| 46 | root of the debugfs filesystem. Within the hcall_inst directory |
| 47 | are files that contain CPU specific call statistics. |
| 48 | |
| 49 | This option will add a small amount of overhead to all hypervisor |
| 50 | calls. |
| 51 | |
| 52 | config PPC_EMULATED_STATS |
| 53 | bool "Emulated instructions tracking" |
| 54 | depends on DEBUG_FS |
| 55 | help |
| 56 | Adds code to keep track of the number of instructions that are |
| 57 | emulated by the in-kernel emulator. Counters for the various classes |
| 58 | of emulated instructions are available under |
| 59 | powerpc/emulated_instructions/ in the root of the debugfs file |
| 60 | system. Optionally (controlled by |
| 61 | powerpc/emulated_instructions/do_warn in debugfs), rate-limited |
| 62 | warnings can be printed to the console when instructions are |
| 63 | emulated. |
| 64 | |
| 65 | config CODE_PATCHING_SELFTEST |
| 66 | bool "Run self-tests of the code-patching code." |
| 67 | depends on DEBUG_KERNEL |
| 68 | default n |
| 69 | |
| 70 | config FTR_FIXUP_SELFTEST |
| 71 | bool "Run self-tests of the feature-fixup code." |
| 72 | depends on DEBUG_KERNEL |
| 73 | default n |
| 74 | |
| 75 | config MSI_BITMAP_SELFTEST |
| 76 | bool "Run self-tests of the MSI bitmap code." |
| 77 | depends on DEBUG_KERNEL |
| 78 | default n |
| 79 | |
| 80 | config XMON |
| 81 | bool "Include xmon kernel debugger" |
| 82 | depends on DEBUG_KERNEL |
| 83 | help |
| 84 | Include in-kernel hooks for the xmon kernel monitor/debugger. |
| 85 | Unless you are intending to debug the kernel, say N here. |
| 86 | Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise |
| 87 | nothing will appear on the screen (xmon writes directly to the |
| 88 | framebuffer memory). |
| 89 | The cmdline option 'xmon' or 'xmon=early' will drop into xmon |
| 90 | very early during boot. 'xmon=on' will just enable the xmon |
| 91 | debugger hooks. 'xmon=off' will disable the debugger hooks |
| 92 | if CONFIG_XMON_DEFAULT is set. |
| 93 | xmon will print a backtrace on the very first invocation. |
| 94 | 'xmon=nobt' will disable this autobacktrace. |
| 95 | |
| 96 | config XMON_DEFAULT |
| 97 | bool "Enable xmon by default" |
| 98 | depends on XMON |
| 99 | help |
| 100 | xmon is normally disabled unless booted with 'xmon=on'. |
| 101 | Use 'xmon=off' to disable xmon init during runtime. |
| 102 | |
| 103 | config XMON_DISASSEMBLY |
| 104 | bool "Include disassembly support in xmon" |
| 105 | depends on XMON |
| 106 | default y |
| 107 | help |
| 108 | Include support for disassembling in xmon. You probably want |
| 109 | to say Y here, unless you're building for a memory-constrained |
| 110 | system. |
| 111 | |
| 112 | config DEBUGGER |
| 113 | bool |
| 114 | depends on KGDB || XMON |
| 115 | default y |
| 116 | |
| 117 | config BDI_SWITCH |
| 118 | bool "Include BDI-2000 user context switcher" |
| 119 | depends on DEBUG_KERNEL && PPC32 |
| 120 | help |
| 121 | Include in-kernel support for the Abatron BDI2000 debugger. |
| 122 | Unless you are intending to debug the kernel with one of these |
| 123 | machines, say N here. |
| 124 | |
| 125 | config BOOTX_TEXT |
| 126 | bool "Support for early boot text console (BootX or OpenFirmware only)" |
| 127 | depends on PPC_OF && PPC_BOOK3S |
| 128 | help |
| 129 | Say Y here to see progress messages from the boot firmware in text |
| 130 | mode. Requires either BootX or Open Firmware. |
| 131 | |
| 132 | config PPC_EARLY_DEBUG |
| 133 | bool "Early debugging (dangerous)" |
| 134 | help |
| 135 | Say Y to enable some early debugging facilities that may be available |
| 136 | for your processor/board combination. Those facilities are hacks |
| 137 | intended to debug problems early during boot, this should not be |
| 138 | enabled in a production kernel. |
| 139 | Note that enabling this will also cause the kernel default log level |
| 140 | to be pushed to max automatically very early during boot |
| 141 | |
| 142 | choice |
| 143 | prompt "Early debugging console" |
| 144 | depends on PPC_EARLY_DEBUG |
| 145 | help |
| 146 | Use the selected console for early debugging. Careful, if you |
| 147 | enable debugging for the wrong type of machine your kernel |
| 148 | _will not boot_. |
| 149 | |
| 150 | config PPC_EARLY_DEBUG_LPAR |
| 151 | bool "LPAR HV Console" |
| 152 | depends on PPC_PSERIES |
| 153 | help |
| 154 | Select this to enable early debugging for a machine with a HVC |
| 155 | console on vterm 0. |
| 156 | |
| 157 | config PPC_EARLY_DEBUG_LPAR_HVSI |
| 158 | bool "LPAR HVSI Console" |
| 159 | depends on PPC_PSERIES |
| 160 | help |
| 161 | Select this to enable early debugging for a machine with a HVSI |
| 162 | console on a specified vterm. |
| 163 | |
| 164 | config PPC_EARLY_DEBUG_G5 |
| 165 | bool "Apple G5" |
| 166 | depends on PPC_PMAC64 |
| 167 | help |
| 168 | Select this to enable early debugging for Apple G5 machines. |
| 169 | |
| 170 | config PPC_EARLY_DEBUG_RTAS_PANEL |
| 171 | bool "RTAS Panel" |
| 172 | depends on PPC_RTAS |
| 173 | help |
| 174 | Select this to enable early debugging via the RTAS panel. |
| 175 | |
| 176 | config PPC_EARLY_DEBUG_RTAS_CONSOLE |
| 177 | bool "RTAS Console" |
| 178 | depends on PPC_RTAS |
| 179 | select UDBG_RTAS_CONSOLE |
| 180 | help |
| 181 | Select this to enable early debugging via the RTAS console. |
| 182 | |
| 183 | config PPC_EARLY_DEBUG_MAPLE |
| 184 | bool "Maple real mode" |
| 185 | depends on PPC_MAPLE |
| 186 | help |
| 187 | Select this to enable early debugging for Maple. |
| 188 | |
| 189 | config PPC_EARLY_DEBUG_PAS_REALMODE |
| 190 | bool "PA Semi real mode" |
| 191 | depends on PPC_PASEMI |
| 192 | help |
| 193 | Select this to enable early debugging for PA Semi. |
| 194 | Output will be on UART0. |
| 195 | |
| 196 | config PPC_EARLY_DEBUG_BEAT |
| 197 | bool "Beat HV Console" |
| 198 | depends on PPC_CELLEB |
| 199 | select PPC_UDBG_BEAT |
| 200 | help |
| 201 | Select this to enable early debugging for Celleb with Beat. |
| 202 | |
| 203 | config PPC_EARLY_DEBUG_44x |
| 204 | bool "Early serial debugging for IBM/AMCC 44x CPUs" |
| 205 | # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water |
| 206 | # mark, which doesn't work with current 440 KVM. |
| 207 | depends on 44x && !KVM |
| 208 | help |
| 209 | Select this to enable early debugging for IBM 44x chips via the |
| 210 | inbuilt serial port. If you enable this, ensure you set |
| 211 | PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. |
| 212 | |
| 213 | config PPC_EARLY_DEBUG_40x |
| 214 | bool "Early serial debugging for IBM/AMCC 40x CPUs" |
| 215 | depends on 40x |
| 216 | help |
| 217 | Select this to enable early debugging for IBM 40x chips via the |
| 218 | inbuilt serial port. This works on chips with a 16550 compatible |
| 219 | UART. Xilinx chips with uartlite cannot use this option. |
| 220 | |
| 221 | config PPC_EARLY_DEBUG_CPM |
| 222 | bool "Early serial debugging for Freescale CPM-based serial ports" |
| 223 | depends on SERIAL_CPM |
| 224 | select PIN_TLB if PPC_8xx |
| 225 | help |
| 226 | Select this to enable early debugging for Freescale chips |
| 227 | using a CPM-based serial port. This assumes that the bootwrapper |
| 228 | has run, and set up the CPM in a particular way. |
| 229 | |
| 230 | config PPC_EARLY_DEBUG_USBGECKO |
| 231 | bool "Early debugging through the USB Gecko adapter" |
| 232 | depends on GAMECUBE_COMMON |
| 233 | select USBGECKO_UDBG |
| 234 | help |
| 235 | Select this to enable early debugging for Nintendo GameCube/Wii |
| 236 | consoles via an external USB Gecko adapter. |
| 237 | |
| 238 | config PPC_EARLY_DEBUG_WSP |
| 239 | bool "Early debugging via WSP's internal UART" |
| 240 | depends on PPC_WSP |
| 241 | select PPC_UDBG_16550 |
| 242 | |
| 243 | config PPC_EARLY_DEBUG_PS3GELIC |
| 244 | bool "Early debugging through the PS3 Ethernet port" |
| 245 | depends on PPC_PS3 |
| 246 | select PS3GELIC_UDBG |
| 247 | help |
| 248 | Select this to enable early debugging for the PlayStation3 via |
| 249 | UDP broadcasts sent out through the Ethernet port. |
| 250 | |
| 251 | config PPC_EARLY_DEBUG_OPAL_RAW |
| 252 | bool "OPAL raw console" |
| 253 | depends on HVC_OPAL |
| 254 | help |
| 255 | Select this to enable early debugging for the PowerNV platform |
| 256 | using a "raw" console |
| 257 | |
| 258 | config PPC_EARLY_DEBUG_OPAL_HVSI |
| 259 | bool "OPAL hvsi console" |
| 260 | depends on HVC_OPAL |
| 261 | help |
| 262 | Select this to enable early debugging for the PowerNV platform |
| 263 | using an "hvsi" console |
| 264 | |
| 265 | config PPC_EARLY_DEBUG_MEMCONS |
| 266 | bool "In memory console" |
| 267 | help |
| 268 | Select this to enable early debugging using an in memory console. |
| 269 | This console provides input and output buffers stored within the |
| 270 | kernel BSS and should be safe to select on any system. A debugger |
| 271 | can then be used to read kernel output or send input to the console. |
| 272 | endchoice |
| 273 | |
| 274 | config PPC_MEMCONS_OUTPUT_SIZE |
| 275 | int "In memory console output buffer size" |
| 276 | depends on PPC_EARLY_DEBUG_MEMCONS |
| 277 | default 4096 |
| 278 | help |
| 279 | Selects the size of the output buffer (in bytes) of the in memory |
| 280 | console. |
| 281 | |
| 282 | config PPC_MEMCONS_INPUT_SIZE |
| 283 | int "In memory console input buffer size" |
| 284 | depends on PPC_EARLY_DEBUG_MEMCONS |
| 285 | default 128 |
| 286 | help |
| 287 | Selects the size of the input buffer (in bytes) of the in memory |
| 288 | console. |
| 289 | |
| 290 | config PPC_EARLY_DEBUG_OPAL |
| 291 | def_bool y |
| 292 | depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI |
| 293 | |
| 294 | |
| 295 | config PPC_EARLY_DEBUG_HVSI_VTERMNO |
| 296 | hex "vterm number to use with early debug HVSI" |
| 297 | depends on PPC_EARLY_DEBUG_LPAR_HVSI |
| 298 | default "0x30000000" |
| 299 | help |
| 300 | You probably want 0x30000000 for your first serial port and |
| 301 | 0x30000001 for your second one |
| 302 | |
| 303 | config PPC_EARLY_DEBUG_OPAL_VTERMNO |
| 304 | hex "vterm number to use with OPAL early debug" |
| 305 | depends on PPC_EARLY_DEBUG_OPAL |
| 306 | default "0" |
| 307 | help |
| 308 | This correspond to which /dev/hvcN you want to use for early |
| 309 | debug. |
| 310 | |
| 311 | On OPAL v1 (takeover) this should always be 0 |
| 312 | On OPAL v2, this will be 0 for network console and 1 or 2 for |
| 313 | the machine built-in serial ports. |
| 314 | |
| 315 | config PPC_EARLY_DEBUG_44x_PHYSLOW |
| 316 | hex "Low 32 bits of early debug UART physical address" |
| 317 | depends on PPC_EARLY_DEBUG_44x |
| 318 | default "0x40000200" |
| 319 | help |
| 320 | You probably want 0x40000200 for ebony boards and |
| 321 | 0x40000300 for taishan |
| 322 | |
| 323 | config PPC_EARLY_DEBUG_44x_PHYSHIGH |
| 324 | hex "EPRN of early debug UART physical address" |
| 325 | depends on PPC_EARLY_DEBUG_44x |
| 326 | default "0x1" |
| 327 | |
| 328 | config PPC_EARLY_DEBUG_40x_PHYSADDR |
| 329 | hex "Early debug UART physical address" |
| 330 | depends on PPC_EARLY_DEBUG_40x |
| 331 | default "0xef600300" |
| 332 | |
| 333 | config PPC_EARLY_DEBUG_CPM_ADDR |
| 334 | hex "CPM UART early debug transmit descriptor address" |
| 335 | depends on PPC_EARLY_DEBUG_CPM |
| 336 | default "0xfa202008" if PPC_EP88XC |
| 337 | default "0xf0001ff8" if CPM2 |
| 338 | default "0xff002008" if CPM1 |
| 339 | help |
| 340 | This specifies the address of the transmit descriptor |
| 341 | used for early debug output. Because it is needed before |
| 342 | platform probing is done, all platforms selected must |
| 343 | share the same address. |
| 344 | |
| 345 | config STRICT_DEVMEM |
| 346 | def_bool y |
| 347 | prompt "Filter access to /dev/mem" |
| 348 | help |
| 349 | This option restricts access to /dev/mem. If this option is |
| 350 | disabled, you allow userspace access to all memory, including |
| 351 | kernel and userspace memory. Accidental memory access is likely |
| 352 | to be disastrous. |
| 353 | Memory access is required for experts who want to debug the kernel. |
| 354 | |
| 355 | If you are unsure, say Y. |
| 356 | |
| 357 | config FAIL_IOMMU |
| 358 | bool "Fault-injection capability for IOMMU" |
| 359 | depends on FAULT_INJECTION |
| 360 | help |
| 361 | Provide fault-injection capability for IOMMU. Each device can |
| 362 | be selectively enabled via the fail_iommu property. |
| 363 | |
| 364 | If you are unsure, say N. |
| 365 | |
| 366 | endmenu |