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