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