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 JUMP_LABEL_FEATURE_CHECKS 64 bool "Enable use of jump label for cpu/mmu_has_feature()" 65 depends on JUMP_LABEL 66 default y 67 help 68 Selecting this options enables use of jump labels for some internal 69 feature checks. This should generate more optimal code for those 70 checks. 71 72config JUMP_LABEL_FEATURE_CHECK_DEBUG 73 bool "Do extra check on feature fixup calls" 74 depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS 75 default n 76 help 77 This tries to catch incorrect usage of cpu_has_feature() and 78 mmu_has_feature() in the code. 79 80 If you don't know what this means, say N. 81 82config FTR_FIXUP_SELFTEST 83 bool "Run self-tests of the feature-fixup code" 84 depends on DEBUG_KERNEL 85 default n 86 87config MSI_BITMAP_SELFTEST 88 bool "Run self-tests of the MSI bitmap code" 89 depends on DEBUG_KERNEL 90 default n 91 92config XMON 93 bool "Include xmon kernel debugger" 94 depends on DEBUG_KERNEL 95 help 96 Include in-kernel hooks for the xmon kernel monitor/debugger. 97 Unless you are intending to debug the kernel, say N here. 98 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise 99 nothing will appear on the screen (xmon writes directly to the 100 framebuffer memory). 101 The cmdline option 'xmon' or 'xmon=early' will drop into xmon 102 very early during boot. 'xmon=on' will just enable the xmon 103 debugger hooks. 'xmon=off' will disable the debugger hooks 104 if CONFIG_XMON_DEFAULT is set. 105 xmon will print a backtrace on the very first invocation. 106 'xmon=nobt' will disable this autobacktrace. 107 108config XMON_DEFAULT 109 bool "Enable xmon by default" 110 depends on XMON 111 help 112 xmon is normally disabled unless booted with 'xmon=on'. 113 Use 'xmon=off' to disable xmon init during runtime. 114 115config XMON_DISASSEMBLY 116 bool "Include disassembly support in xmon" 117 depends on XMON 118 default y 119 help 120 Include support for disassembling in xmon. You probably want 121 to say Y here, unless you're building for a memory-constrained 122 system. 123 124config DEBUGGER 125 bool 126 depends on KGDB || XMON 127 default y 128 129config BDI_SWITCH 130 bool "Include BDI-2000 user context switcher" 131 depends on DEBUG_KERNEL && PPC32 132 help 133 Include in-kernel support for the Abatron BDI2000 debugger. 134 Unless you are intending to debug the kernel with one of these 135 machines, say N here. 136 137config BOOTX_TEXT 138 bool "Support for early boot text console (BootX or OpenFirmware only)" 139 depends on PPC_BOOK3S 140 help 141 Say Y here to see progress messages from the boot firmware in text 142 mode. Requires either BootX or Open Firmware. 143 144config PPC_EARLY_DEBUG 145 bool "Early debugging (dangerous)" 146 help 147 Say Y to enable some early debugging facilities that may be available 148 for your processor/board combination. Those facilities are hacks 149 intended to debug problems early during boot, this should not be 150 enabled in a production kernel. 151 Note that enabling this will also cause the kernel default log level 152 to be pushed to max automatically very early during boot 153 154choice 155 prompt "Early debugging console" 156 depends on PPC_EARLY_DEBUG 157 help 158 Use the selected console for early debugging. Careful, if you 159 enable debugging for the wrong type of machine your kernel 160 _will not boot_. 161 162config PPC_EARLY_DEBUG_BOOTX 163 bool "BootX or OpenFirmware" 164 depends on BOOTX_TEXT 165 help 166 Select this to enable early debugging for a machine using BootX 167 or OpenFirmware. 168 169config PPC_EARLY_DEBUG_LPAR 170 bool "LPAR HV Console" 171 depends on PPC_PSERIES && HVC_CONSOLE 172 help 173 Select this to enable early debugging for a machine with a HVC 174 console on vterm 0. 175 176config PPC_EARLY_DEBUG_LPAR_HVSI 177 bool "LPAR HVSI Console" 178 depends on PPC_PSERIES && HVC_CONSOLE 179 help 180 Select this to enable early debugging for a machine with a HVSI 181 console on a specified vterm. 182 183config PPC_EARLY_DEBUG_G5 184 bool "Apple G5" 185 depends on PPC_PMAC64 186 help 187 Select this to enable early debugging for Apple G5 machines. 188 189config PPC_EARLY_DEBUG_RTAS_PANEL 190 bool "RTAS Panel" 191 depends on PPC_RTAS 192 help 193 Select this to enable early debugging via the RTAS panel. 194 195config PPC_EARLY_DEBUG_RTAS_CONSOLE 196 bool "RTAS Console" 197 depends on PPC_RTAS 198 select UDBG_RTAS_CONSOLE 199 help 200 Select this to enable early debugging via the RTAS console. 201 202config PPC_EARLY_DEBUG_MAPLE 203 bool "Maple real mode" 204 depends on PPC_MAPLE 205 help 206 Select this to enable early debugging for Maple. 207 208config PPC_EARLY_DEBUG_PAS_REALMODE 209 bool "PA Semi real mode" 210 depends on PPC_PASEMI 211 help 212 Select this to enable early debugging for PA Semi. 213 Output will be on UART0. 214 215config PPC_EARLY_DEBUG_44x 216 bool "Early serial debugging for IBM/AMCC 44x CPUs" 217 depends on 44x 218 help 219 Select this to enable early debugging for IBM 44x chips via the 220 inbuilt serial port. If you enable this, ensure you set 221 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. 222 223config PPC_EARLY_DEBUG_40x 224 bool "Early serial debugging for IBM/AMCC 40x CPUs" 225 depends on 40x 226 help 227 Select this to enable early debugging for IBM 40x chips via the 228 inbuilt serial port. This works on chips with a 16550 compatible 229 UART. Xilinx chips with uartlite cannot use this option. 230 231config PPC_EARLY_DEBUG_CPM 232 bool "Early serial debugging for Freescale CPM-based serial ports" 233 depends on SERIAL_CPM 234 help 235 Select this to enable early debugging for Freescale chips 236 using a CPM-based serial port. This assumes that the bootwrapper 237 has run, and set up the CPM in a particular way. 238 239config PPC_EARLY_DEBUG_USBGECKO 240 bool "Early debugging through the USB Gecko adapter" 241 depends on GAMECUBE_COMMON 242 select USBGECKO_UDBG 243 help 244 Select this to enable early debugging for Nintendo GameCube/Wii 245 consoles via an external USB Gecko adapter. 246 247config PPC_EARLY_DEBUG_PS3GELIC 248 bool "Early debugging through the PS3 Ethernet port" 249 depends on PPC_PS3 250 select PS3GELIC_UDBG 251 help 252 Select this to enable early debugging for the PlayStation3 via 253 UDP broadcasts sent out through the Ethernet port. 254 255config PPC_EARLY_DEBUG_OPAL_RAW 256 bool "OPAL raw console" 257 depends on HVC_OPAL 258 help 259 Select this to enable early debugging for the PowerNV platform 260 using a "raw" console 261 262config PPC_EARLY_DEBUG_OPAL_HVSI 263 bool "OPAL hvsi console" 264 depends on HVC_OPAL 265 help 266 Select this to enable early debugging for the PowerNV platform 267 using an "hvsi" console 268 269config PPC_EARLY_DEBUG_MEMCONS 270 bool "In memory console" 271 help 272 Select this to enable early debugging using an in memory console. 273 This console provides input and output buffers stored within the 274 kernel BSS and should be safe to select on any system. A debugger 275 can then be used to read kernel output or send input to the console. 276endchoice 277 278config PPC_MEMCONS_OUTPUT_SIZE 279 int "In memory console output buffer size" 280 depends on PPC_EARLY_DEBUG_MEMCONS 281 default 4096 282 help 283 Selects the size of the output buffer (in bytes) of the in memory 284 console. 285 286config PPC_MEMCONS_INPUT_SIZE 287 int "In memory console input buffer size" 288 depends on PPC_EARLY_DEBUG_MEMCONS 289 default 128 290 help 291 Selects the size of the input buffer (in bytes) of the in memory 292 console. 293 294config PPC_EARLY_DEBUG_OPAL 295 def_bool y 296 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI 297 298 299config PPC_EARLY_DEBUG_HVSI_VTERMNO 300 hex "vterm number to use with early debug HVSI" 301 depends on PPC_EARLY_DEBUG_LPAR_HVSI 302 default "0x30000000" 303 help 304 You probably want 0x30000000 for your first serial port and 305 0x30000001 for your second one 306 307config PPC_EARLY_DEBUG_OPAL_VTERMNO 308 hex "vterm number to use with OPAL early debug" 309 depends on PPC_EARLY_DEBUG_OPAL 310 default "0" 311 help 312 This correspond to which /dev/hvcN you want to use for early 313 debug. 314 315 On OPAL v2, this will be 0 for network console and 1 or 2 for 316 the machine built-in serial ports. 317 318config PPC_EARLY_DEBUG_44x_PHYSLOW 319 hex "Low 32 bits of early debug UART physical address" 320 depends on PPC_EARLY_DEBUG_44x 321 default "0x40000200" 322 help 323 You probably want 0x40000200 for ebony boards and 324 0x40000300 for taishan 325 326config PPC_EARLY_DEBUG_44x_PHYSHIGH 327 hex "EPRN of early debug UART physical address" 328 depends on PPC_EARLY_DEBUG_44x 329 default "0x1" 330 331config PPC_EARLY_DEBUG_40x_PHYSADDR 332 hex "Early debug UART physical address" 333 depends on PPC_EARLY_DEBUG_40x 334 default "0xef600300" 335 336config PPC_EARLY_DEBUG_CPM_ADDR 337 hex "CPM UART early debug transmit descriptor address" 338 depends on PPC_EARLY_DEBUG_CPM 339 default "0xfa202008" if PPC_EP88XC 340 default "0xf0001ff8" if CPM2 341 default "0xff002008" if CPM1 342 help 343 This specifies the address of the transmit descriptor 344 used for early debug output. Because it is needed before 345 platform probing is done, all platforms selected must 346 share the same address. 347 348config FAIL_IOMMU 349 bool "Fault-injection capability for IOMMU" 350 depends on FAULT_INJECTION 351 help 352 Provide fault-injection capability for IOMMU. Each device can 353 be selectively enabled via the fail_iommu property. 354 355 If you are unsure, say N. 356 357config PPC_PTDUMP 358 bool "Export kernel pagetable layout to userspace via debugfs" 359 depends on DEBUG_KERNEL && DEBUG_FS 360 help 361 This option exports the state of the kernel pagetables to a 362 debugfs file. This is only useful for kernel developers who are 363 working in architecture specific areas of the kernel - probably 364 not a good idea to enable this feature in a production kernel. 365 366 If you are unsure, say N. 367 368config PPC_HTDUMP 369 def_bool y 370 depends on PPC_PTDUMP && PPC_BOOK3S 371 372endmenu 373