1# SPDX-License-Identifier: GPL-2.0 2 3config PPC_DISABLE_WERROR 4 bool "Don't build arch/powerpc code with -Werror" 5 help 6 This option tells the compiler NOT to build the code under 7 arch/powerpc with the -Werror flag (which means warnings 8 are treated as errors). 9 10 Only enable this if you are hitting a build failure in the 11 arch/powerpc code caused by a warning, and you don't feel 12 inclined to fix it. 13 14config PPC_WERROR 15 bool 16 depends on !PPC_DISABLE_WERROR 17 default y 18 19config PRINT_STACK_DEPTH 20 int "Stack depth to print" if DEBUG_KERNEL 21 default 64 22 help 23 This option allows you to set the stack depth that the kernel 24 prints in stack traces. This can be useful if your display is 25 too small and stack traces cause important information to 26 scroll off the screen. 27 28config HCALL_STATS 29 bool "Hypervisor call instrumentation" 30 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS 31 help 32 Adds code to keep track of the number of hypervisor calls made and 33 the amount of time spent in hypervisor calls. Wall time spent in 34 each call is always calculated, and if available CPU cycles spent 35 are also calculated. A directory named hcall_inst is added at the 36 root of the debugfs filesystem. Within the hcall_inst directory 37 are files that contain CPU specific call statistics. 38 39 This option will add a small amount of overhead to all hypervisor 40 calls. 41 42config PPC_EMULATED_STATS 43 bool "Emulated instructions tracking" 44 depends on DEBUG_FS 45 help 46 Adds code to keep track of the number of instructions that are 47 emulated by the in-kernel emulator. Counters for the various classes 48 of emulated instructions are available under 49 powerpc/emulated_instructions/ in the root of the debugfs file 50 system. Optionally (controlled by 51 powerpc/emulated_instructions/do_warn in debugfs), rate-limited 52 warnings can be printed to the console when instructions are 53 emulated. 54 55config CODE_PATCHING_SELFTEST 56 bool "Run self-tests of the code-patching code" 57 depends on DEBUG_KERNEL 58 59config JUMP_LABEL_FEATURE_CHECKS 60 bool "Enable use of jump label for cpu/mmu_has_feature()" 61 depends on JUMP_LABEL 62 default y 63 help 64 Selecting this options enables use of jump labels for some internal 65 feature checks. This should generate more optimal code for those 66 checks. 67 68config JUMP_LABEL_FEATURE_CHECK_DEBUG 69 bool "Do extra check on feature fixup calls" 70 depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS 71 help 72 This tries to catch incorrect usage of cpu_has_feature() and 73 mmu_has_feature() in the code. 74 75 If you don't know what this means, say N. 76 77config FTR_FIXUP_SELFTEST 78 bool "Run self-tests of the feature-fixup code" 79 depends on DEBUG_KERNEL 80 81config MSI_BITMAP_SELFTEST 82 bool "Run self-tests of the MSI bitmap code" 83 depends on DEBUG_KERNEL 84 85config PPC_IRQ_SOFT_MASK_DEBUG 86 bool "Include extra checks for powerpc irq soft masking" 87 88config XMON 89 bool "Include xmon kernel debugger" 90 depends on DEBUG_KERNEL 91 help 92 Include in-kernel hooks for the xmon kernel monitor/debugger. 93 Unless you are intending to debug the kernel, say N here. 94 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise 95 nothing will appear on the screen (xmon writes directly to the 96 framebuffer memory). 97 The cmdline option 'xmon' or 'xmon=early' will drop into xmon 98 very early during boot. 'xmon=on' will just enable the xmon 99 debugger hooks. 'xmon=off' will disable the debugger hooks 100 if CONFIG_XMON_DEFAULT is set. 101 xmon will print a backtrace on the very first invocation. 102 'xmon=nobt' will disable this autobacktrace. 103 104config XMON_DEFAULT 105 bool "Enable xmon by default" 106 depends on XMON 107 help 108 xmon is normally disabled unless booted with 'xmon=on'. 109 Use 'xmon=off' to disable xmon init during runtime. 110 111config XMON_DISASSEMBLY 112 bool "Include disassembly support in xmon" 113 depends on XMON 114 default y 115 help 116 Include support for disassembling in xmon. You probably want 117 to say Y here, unless you're building for a memory-constrained 118 system. 119 120config DEBUGGER 121 bool 122 depends on KGDB || XMON 123 default y 124 125config BDI_SWITCH 126 bool "Include BDI-2000 user context switcher" 127 depends on DEBUG_KERNEL && PPC32 128 help 129 Include in-kernel support for the Abatron BDI2000 debugger. 130 Unless you are intending to debug the kernel with one of these 131 machines, say N here. 132 133config BOOTX_TEXT 134 bool "Support for early boot text console (BootX or OpenFirmware only)" 135 depends on PPC_BOOK3S 136 help 137 Say Y here to see progress messages from the boot firmware in text 138 mode. Requires either BootX or Open Firmware. 139 140config PPC_EARLY_DEBUG 141 bool "Early debugging (dangerous)" 142 help 143 Say Y to enable some early debugging facilities that may be available 144 for your processor/board combination. Those facilities are hacks 145 intended to debug problems early during boot, this should not be 146 enabled in a production kernel. 147 Note that enabling this will also cause the kernel default log level 148 to be pushed to max automatically very early during boot 149 150choice 151 prompt "Early debugging console" 152 depends on PPC_EARLY_DEBUG 153 help 154 Use the selected console for early debugging. Careful, if you 155 enable debugging for the wrong type of machine your kernel 156 _will not boot_. 157 158config PPC_EARLY_DEBUG_BOOTX 159 bool "BootX or OpenFirmware" 160 depends on BOOTX_TEXT 161 help 162 Select this to enable early debugging for a machine using BootX 163 or OpenFirmware. 164 165config PPC_EARLY_DEBUG_LPAR 166 bool "LPAR HV Console" 167 depends on PPC_PSERIES && HVC_CONSOLE 168 help 169 Select this to enable early debugging for a machine with a HVC 170 console on vterm 0. 171 172config PPC_EARLY_DEBUG_LPAR_HVSI 173 bool "LPAR HVSI Console" 174 depends on PPC_PSERIES && HVC_CONSOLE 175 help 176 Select this to enable early debugging for a machine with a HVSI 177 console on a specified vterm. 178 179config PPC_EARLY_DEBUG_G5 180 bool "Apple G5" 181 depends on PPC_PMAC64 182 help 183 Select this to enable early debugging for Apple G5 machines. 184 185config PPC_EARLY_DEBUG_RTAS_PANEL 186 bool "RTAS Panel" 187 depends on PPC_RTAS 188 help 189 Select this to enable early debugging via the RTAS panel. 190 191config PPC_EARLY_DEBUG_RTAS_CONSOLE 192 bool "RTAS Console" 193 depends on PPC_RTAS 194 select UDBG_RTAS_CONSOLE 195 help 196 Select this to enable early debugging via the RTAS console. 197 198config PPC_EARLY_DEBUG_MAPLE 199 bool "Maple real mode" 200 depends on PPC_MAPLE 201 help 202 Select this to enable early debugging for Maple. 203 204config PPC_EARLY_DEBUG_PAS_REALMODE 205 bool "PA Semi real mode" 206 depends on PPC_PASEMI 207 help 208 Select this to enable early debugging for PA Semi. 209 Output will be on UART0. 210 211config PPC_EARLY_DEBUG_44x 212 bool "Early serial debugging for IBM/AMCC 44x CPUs" 213 depends on 44x 214 help 215 Select this to enable early debugging for IBM 44x chips via the 216 inbuilt serial port. If you enable this, ensure you set 217 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. 218 219config PPC_EARLY_DEBUG_40x 220 bool "Early serial debugging for IBM/AMCC 40x CPUs" 221 depends on 40x 222 help 223 Select this to enable early debugging for IBM 40x chips via the 224 inbuilt serial port. This works on chips with a 16550 compatible 225 UART. Xilinx chips with uartlite cannot use this option. 226 227config PPC_EARLY_DEBUG_CPM 228 bool "Early serial debugging for Freescale CPM-based serial ports" 229 depends on SERIAL_CPM 230 help 231 Select this to enable early debugging for Freescale chips 232 using a CPM-based serial port. This assumes that the bootwrapper 233 has run, and set up the CPM in a particular way. 234 235config PPC_EARLY_DEBUG_USBGECKO 236 bool "Early debugging through the USB Gecko adapter" 237 depends on GAMECUBE_COMMON 238 select USBGECKO_UDBG 239 help 240 Select this to enable early debugging for Nintendo GameCube/Wii 241 consoles via an external USB Gecko adapter. 242 243config 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 251config 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 258config 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 265config 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. 272endchoice 273 274config 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 282config 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 290config PPC_EARLY_DEBUG_OPAL 291 def_bool y 292 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI 293 294 295config 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 303config 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 v2, this will be 0 for network console and 1 or 2 for 312 the machine built-in serial ports. 313 314config PPC_EARLY_DEBUG_44x_PHYSLOW 315 hex "Low 32 bits of early debug UART physical address" 316 depends on PPC_EARLY_DEBUG_44x 317 default "0x40000200" 318 help 319 You probably want 0x40000200 for ebony boards and 320 0x40000300 for taishan 321 322config PPC_EARLY_DEBUG_44x_PHYSHIGH 323 hex "EPRN of early debug UART physical address" 324 depends on PPC_EARLY_DEBUG_44x 325 default "0x1" 326 327config PPC_EARLY_DEBUG_40x_PHYSADDR 328 hex "Early debug UART physical address" 329 depends on PPC_EARLY_DEBUG_40x 330 default "0xef600300" 331 332config PPC_EARLY_DEBUG_CPM_ADDR 333 hex "CPM UART early debug transmit descriptor address" 334 depends on PPC_EARLY_DEBUG_CPM 335 default "0xfa202008" if PPC_EP88XC 336 default "0xf0001ff8" if CPM2 337 default "0xff002008" if CPM1 338 help 339 This specifies the address of the transmit descriptor 340 used for early debug output. Because it is needed before 341 platform probing is done, all platforms selected must 342 share the same address. 343 344config FAIL_IOMMU 345 bool "Fault-injection capability for IOMMU" 346 depends on FAULT_INJECTION 347 help 348 Provide fault-injection capability for IOMMU. Each device can 349 be selectively enabled via the fail_iommu property. 350 351 If you are unsure, say N. 352 353config PPC_PTDUMP 354 bool "Export kernel pagetable layout to userspace via debugfs" 355 depends on DEBUG_KERNEL && DEBUG_FS 356 help 357 This option exports the state of the kernel pagetables to a 358 debugfs file. This is only useful for kernel developers who are 359 working in architecture specific areas of the kernel - probably 360 not a good idea to enable this feature in a production kernel. 361 362 If you are unsure, say N. 363 364config PPC_HTDUMP 365 def_bool y 366 depends on PPC_PTDUMP && PPC_BOOK3S_64 367 368config PPC_FAST_ENDIAN_SWITCH 369 bool "Deprecated fast endian-switch syscall" 370 depends on DEBUG_KERNEL && PPC_BOOK3S_64 371 help 372 If you're unsure what this is, say N. 373