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 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 38config 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 52config 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 65config CODE_PATCHING_SELFTEST 66 bool "Run self-tests of the code-patching code." 67 depends on DEBUG_KERNEL 68 default n 69 70config FTR_FIXUP_SELFTEST 71 bool "Run self-tests of the feature-fixup code." 72 depends on DEBUG_KERNEL 73 default n 74 75config MSI_BITMAP_SELFTEST 76 bool "Run self-tests of the MSI bitmap code." 77 depends on DEBUG_KERNEL 78 default n 79 80config 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 96config 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 103config 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 112config DEBUGGER 113 bool 114 depends on KGDB || XMON 115 default y 116 117config VIRQ_DEBUG 118 bool "Expose hardware/virtual IRQ mapping via debugfs" 119 depends on DEBUG_FS 120 help 121 This option will show the mapping relationship between hardware irq 122 numbers and virtual irq numbers. The mapping is exposed via debugfs 123 in the file powerpc/virq_mapping. 124 125 If you don't know what this means you don't need it. 126 127config BDI_SWITCH 128 bool "Include BDI-2000 user context switcher" 129 depends on DEBUG_KERNEL && PPC32 130 help 131 Include in-kernel support for the Abatron BDI2000 debugger. 132 Unless you are intending to debug the kernel with one of these 133 machines, say N here. 134 135config BOOTX_TEXT 136 bool "Support for early boot text console (BootX or OpenFirmware only)" 137 depends on PPC_OF && PPC_BOOK3S 138 help 139 Say Y here to see progress messages from the boot firmware in text 140 mode. Requires either BootX or Open Firmware. 141 142config PPC_EARLY_DEBUG 143 bool "Early debugging (dangerous)" 144 # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water 145 # mark, which doesn't work with current 440 KVM. 146 depends on !KVM 147 help 148 Say Y to enable some early debugging facilities that may be available 149 for your processor/board combination. Those facilities are hacks 150 intended to debug problems early during boot, this should not be 151 enabled in a production kernel. 152 Note that enabling this will also cause the kernel default log level 153 to be pushed to max automatically very early during boot 154 155choice 156 prompt "Early debugging console" 157 depends on PPC_EARLY_DEBUG 158 help 159 Use the selected console for early debugging. Careful, if you 160 enable debugging for the wrong type of machine your kernel 161 _will not boot_. 162 163config PPC_EARLY_DEBUG_LPAR 164 bool "LPAR HV Console" 165 depends on PPC_PSERIES 166 help 167 Select this to enable early debugging for a machine with a HVC 168 console on vterm 0. 169 170config PPC_EARLY_DEBUG_LPAR_HVSI 171 bool "LPAR HVSI Console" 172 depends on PPC_PSERIES 173 help 174 Select this to enable early debugging for a machine with a HVSI 175 console on a specified vterm. 176 177config PPC_EARLY_DEBUG_G5 178 bool "Apple G5" 179 depends on PPC_PMAC64 180 help 181 Select this to enable early debugging for Apple G5 machines. 182 183config PPC_EARLY_DEBUG_RTAS_PANEL 184 bool "RTAS Panel" 185 depends on PPC_RTAS 186 help 187 Select this to enable early debugging via the RTAS panel. 188 189config PPC_EARLY_DEBUG_RTAS_CONSOLE 190 bool "RTAS Console" 191 depends on PPC_RTAS 192 select UDBG_RTAS_CONSOLE 193 help 194 Select this to enable early debugging via the RTAS console. 195 196config PPC_EARLY_DEBUG_MAPLE 197 bool "Maple real mode" 198 depends on PPC_MAPLE 199 help 200 Select this to enable early debugging for Maple. 201 202config PPC_EARLY_DEBUG_ISERIES 203 bool "iSeries HV Console" 204 depends on PPC_ISERIES 205 help 206 Select this to enable early debugging for legacy iSeries. You need 207 to hit "Ctrl-x Ctrl-x" to see the messages on the console. 208 209config PPC_EARLY_DEBUG_PAS_REALMODE 210 bool "PA Semi real mode" 211 depends on PPC_PASEMI 212 help 213 Select this to enable early debugging for PA Semi. 214 Output will be on UART0. 215 216config PPC_EARLY_DEBUG_BEAT 217 bool "Beat HV Console" 218 depends on PPC_CELLEB 219 select PPC_UDBG_BEAT 220 help 221 Select this to enable early debugging for Celleb with Beat. 222 223config PPC_EARLY_DEBUG_44x 224 bool "Early serial debugging for IBM/AMCC 44x CPUs" 225 depends on 44x 226 help 227 Select this to enable early debugging for IBM 44x chips via the 228 inbuilt serial port. If you enable this, ensure you set 229 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. 230 231config PPC_EARLY_DEBUG_40x 232 bool "Early serial debugging for IBM/AMCC 40x CPUs" 233 depends on 40x 234 help 235 Select this to enable early debugging for IBM 40x chips via the 236 inbuilt serial port. This works on chips with a 16550 compatible 237 UART. Xilinx chips with uartlite cannot use this option. 238 239config PPC_EARLY_DEBUG_CPM 240 bool "Early serial debugging for Freescale CPM-based serial ports" 241 depends on SERIAL_CPM 242 select PIN_TLB if PPC_8xx 243 help 244 Select this to enable early debugging for Freescale chips 245 using a CPM-based serial port. This assumes that the bootwrapper 246 has run, and set up the CPM in a particular way. 247 248config PPC_EARLY_DEBUG_USBGECKO 249 bool "Early debugging through the USB Gecko adapter" 250 depends on GAMECUBE_COMMON 251 select USBGECKO_UDBG 252 help 253 Select this to enable early debugging for Nintendo GameCube/Wii 254 consoles via an external USB Gecko adapter. 255 256config PPC_EARLY_DEBUG_WSP 257 bool "Early debugging via WSP's internal UART" 258 depends on PPC_WSP 259 select PPC_UDBG_16550 260 261endchoice 262 263config PPC_EARLY_DEBUG_HVSI_VTERMNO 264 hex "vterm number to use with early debug HVSI" 265 depends on PPC_EARLY_DEBUG_LPAR_HVSI 266 default "0x30000000" 267 help 268 You probably want 0x30000000 for your first serial port and 269 0x30000001 for your second one 270 271config PPC_EARLY_DEBUG_44x_PHYSLOW 272 hex "Low 32 bits of early debug UART physical address" 273 depends on PPC_EARLY_DEBUG_44x 274 default "0x40000200" 275 help 276 You probably want 0x40000200 for ebony boards and 277 0x40000300 for taishan 278 279config PPC_EARLY_DEBUG_44x_PHYSHIGH 280 hex "EPRN of early debug UART physical address" 281 depends on PPC_EARLY_DEBUG_44x 282 default "0x1" 283 284config PPC_EARLY_DEBUG_40x_PHYSADDR 285 hex "Early debug UART physical address" 286 depends on PPC_EARLY_DEBUG_40x 287 default "0xef600300" 288 289config PPC_EARLY_DEBUG_CPM_ADDR 290 hex "CPM UART early debug transmit descriptor address" 291 depends on PPC_EARLY_DEBUG_CPM 292 default "0xfa202008" if PPC_EP88XC 293 default "0xf0001ff8" if CPM2 294 default "0xff002008" if CPM1 295 help 296 This specifies the address of the transmit descriptor 297 used for early debug output. Because it is needed before 298 platform probing is done, all platforms selected must 299 share the same address. 300 301endmenu 302