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 XMON_DEFAULT_RO_MODE 121 bool "Restrict xmon to read-only operations by default" 122 depends on XMON 123 default y 124 help 125 Operate xmon in read-only mode. The cmdline options 'xmon=rw' and 126 'xmon=ro' override this default. 127 128config DEBUGGER 129 bool 130 depends on KGDB || XMON 131 default y 132 133config BDI_SWITCH 134 bool "Include BDI-2000 user context switcher" 135 depends on DEBUG_KERNEL && PPC32 136 help 137 Include in-kernel support for the Abatron BDI2000 debugger. 138 Unless you are intending to debug the kernel with one of these 139 machines, say N here. 140 141config BOOTX_TEXT 142 bool "Support for early boot text console (BootX or OpenFirmware only)" 143 depends on PPC_BOOK3S 144 help 145 Say Y here to see progress messages from the boot firmware in text 146 mode. Requires either BootX or Open Firmware. 147 148config PPC_EARLY_DEBUG 149 bool "Early debugging (dangerous)" 150 help 151 Say Y to enable some early debugging facilities that may be available 152 for your processor/board combination. Those facilities are hacks 153 intended to debug problems early during boot, this should not be 154 enabled in a production kernel. 155 Note that enabling this will also cause the kernel default log level 156 to be pushed to max automatically very early during boot 157 158choice 159 prompt "Early debugging console" 160 depends on PPC_EARLY_DEBUG 161 help 162 Use the selected console for early debugging. Careful, if you 163 enable debugging for the wrong type of machine your kernel 164 _will not boot_. 165 166config PPC_EARLY_DEBUG_BOOTX 167 bool "BootX or OpenFirmware" 168 depends on BOOTX_TEXT 169 help 170 Select this to enable early debugging for a machine using BootX 171 or OpenFirmware. 172 173config PPC_EARLY_DEBUG_LPAR 174 bool "LPAR HV Console" 175 depends on PPC_PSERIES && HVC_CONSOLE 176 help 177 Select this to enable early debugging for a machine with a HVC 178 console on vterm 0. 179 180config PPC_EARLY_DEBUG_LPAR_HVSI 181 bool "LPAR HVSI Console" 182 depends on PPC_PSERIES && HVC_CONSOLE 183 help 184 Select this to enable early debugging for a machine with a HVSI 185 console on a specified vterm. 186 187config PPC_EARLY_DEBUG_G5 188 bool "Apple G5" 189 depends on PPC_PMAC64 190 help 191 Select this to enable early debugging for Apple G5 machines. 192 193config PPC_EARLY_DEBUG_RTAS_PANEL 194 bool "RTAS Panel" 195 depends on PPC_RTAS 196 help 197 Select this to enable early debugging via the RTAS panel. 198 199config PPC_EARLY_DEBUG_RTAS_CONSOLE 200 bool "RTAS Console" 201 depends on PPC_RTAS 202 select UDBG_RTAS_CONSOLE 203 help 204 Select this to enable early debugging via the RTAS console. 205 206config PPC_EARLY_DEBUG_MAPLE 207 bool "Maple real mode" 208 depends on PPC_MAPLE 209 help 210 Select this to enable early debugging for Maple. 211 212config PPC_EARLY_DEBUG_PAS_REALMODE 213 bool "PA Semi real mode" 214 depends on PPC_PASEMI 215 help 216 Select this to enable early debugging for PA Semi. 217 Output will be on UART0. 218 219config PPC_EARLY_DEBUG_44x 220 bool "Early serial debugging for IBM/AMCC 44x CPUs" 221 depends on 44x 222 help 223 Select this to enable early debugging for IBM 44x chips via the 224 inbuilt serial port. If you enable this, ensure you set 225 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. 226 227config PPC_EARLY_DEBUG_40x 228 bool "Early serial debugging for IBM/AMCC 40x CPUs" 229 depends on 40x 230 help 231 Select this to enable early debugging for IBM 40x chips via the 232 inbuilt serial port. This works on chips with a 16550 compatible 233 UART. Xilinx chips with uartlite cannot use this option. 234 235config PPC_EARLY_DEBUG_CPM 236 bool "Early serial debugging for Freescale CPM-based serial ports" 237 depends on SERIAL_CPM 238 help 239 Select this to enable early debugging for Freescale chips 240 using a CPM-based serial port. This assumes that the bootwrapper 241 has run, and set up the CPM in a particular way. 242 243config PPC_EARLY_DEBUG_USBGECKO 244 bool "Early debugging through the USB Gecko adapter" 245 depends on GAMECUBE_COMMON 246 select USBGECKO_UDBG 247 help 248 Select this to enable early debugging for Nintendo GameCube/Wii 249 consoles via an external USB Gecko adapter. 250 251config PPC_EARLY_DEBUG_PS3GELIC 252 bool "Early debugging through the PS3 Ethernet port" 253 depends on PPC_PS3 254 select PS3GELIC_UDBG 255 help 256 Select this to enable early debugging for the PlayStation3 via 257 UDP broadcasts sent out through the Ethernet port. 258 259config PPC_EARLY_DEBUG_OPAL_RAW 260 bool "OPAL raw console" 261 depends on HVC_OPAL 262 help 263 Select this to enable early debugging for the PowerNV platform 264 using a "raw" console 265 266config PPC_EARLY_DEBUG_OPAL_HVSI 267 bool "OPAL hvsi console" 268 depends on HVC_OPAL 269 help 270 Select this to enable early debugging for the PowerNV platform 271 using an "hvsi" console 272 273config PPC_EARLY_DEBUG_MEMCONS 274 bool "In memory console" 275 help 276 Select this to enable early debugging using an in memory console. 277 This console provides input and output buffers stored within the 278 kernel BSS and should be safe to select on any system. A debugger 279 can then be used to read kernel output or send input to the console. 280endchoice 281 282config PPC_MEMCONS_OUTPUT_SIZE 283 int "In memory console output buffer size" 284 depends on PPC_EARLY_DEBUG_MEMCONS 285 default 4096 286 help 287 Selects the size of the output buffer (in bytes) of the in memory 288 console. 289 290config PPC_MEMCONS_INPUT_SIZE 291 int "In memory console input buffer size" 292 depends on PPC_EARLY_DEBUG_MEMCONS 293 default 128 294 help 295 Selects the size of the input buffer (in bytes) of the in memory 296 console. 297 298config PPC_EARLY_DEBUG_OPAL 299 def_bool y 300 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI 301 302 303config PPC_EARLY_DEBUG_HVSI_VTERMNO 304 hex "vterm number to use with early debug HVSI" 305 depends on PPC_EARLY_DEBUG_LPAR_HVSI 306 default "0x30000000" 307 help 308 You probably want 0x30000000 for your first serial port and 309 0x30000001 for your second one 310 311config PPC_EARLY_DEBUG_OPAL_VTERMNO 312 hex "vterm number to use with OPAL early debug" 313 depends on PPC_EARLY_DEBUG_OPAL 314 default "0" 315 help 316 This correspond to which /dev/hvcN you want to use for early 317 debug. 318 319 On OPAL v2, this will be 0 for network console and 1 or 2 for 320 the machine built-in serial ports. 321 322config PPC_EARLY_DEBUG_44x_PHYSLOW 323 hex "Low 32 bits of early debug UART physical address" 324 depends on PPC_EARLY_DEBUG_44x 325 default "0x40000200" 326 help 327 You probably want 0x40000200 for ebony boards and 328 0x40000300 for taishan 329 330config PPC_EARLY_DEBUG_44x_PHYSHIGH 331 hex "EPRN of early debug UART physical address" 332 depends on PPC_EARLY_DEBUG_44x 333 default "0x1" 334 335config PPC_EARLY_DEBUG_40x_PHYSADDR 336 hex "Early debug UART physical address" 337 depends on PPC_EARLY_DEBUG_40x 338 default "0xef600300" 339 340config PPC_EARLY_DEBUG_CPM_ADDR 341 hex "CPM UART early debug transmit descriptor address" 342 depends on PPC_EARLY_DEBUG_CPM 343 default "0xfa202008" if PPC_EP88XC 344 default "0xf0001ff8" if CPM2 345 default "0xff002008" if CPM1 346 help 347 This specifies the address of the transmit descriptor 348 used for early debug output. Because it is needed before 349 platform probing is done, all platforms selected must 350 share the same address. 351 352config FAIL_IOMMU 353 bool "Fault-injection capability for IOMMU" 354 depends on FAULT_INJECTION 355 help 356 Provide fault-injection capability for IOMMU. Each device can 357 be selectively enabled via the fail_iommu property. 358 359 If you are unsure, say N. 360 361config PPC_PTDUMP 362 bool "Export kernel pagetable layout to userspace via debugfs" 363 depends on DEBUG_KERNEL && DEBUG_FS 364 help 365 This option exports the state of the kernel pagetables to a 366 debugfs file. This is only useful for kernel developers who are 367 working in architecture specific areas of the kernel - probably 368 not a good idea to enable this feature in a production kernel. 369 370 If you are unsure, say N. 371 372config PPC_DEBUG_WX 373 bool "Warn on W+X mappings at boot" 374 depends on PPC_PTDUMP 375 help 376 Generate a warning if any W+X mappings are found at boot. 377 378 This is useful for discovering cases where the kernel is leaving 379 W+X mappings after applying NX, as such mappings are a security risk. 380 381 Note that even if the check fails, your kernel is possibly 382 still fine, as W+X mappings are not a security hole in 383 themselves, what they do is that they make the exploitation 384 of other unfixed kernel bugs easier. 385 386 There is no runtime or memory usage effect of this option 387 once the kernel has booted up - it's a one time check. 388 389 If in doubt, say "Y". 390 391config PPC_FAST_ENDIAN_SWITCH 392 bool "Deprecated fast endian-switch syscall" 393 depends on DEBUG_KERNEL && PPC_BOOK3S_64 394 help 395 If you're unsure what this is, say N. 396 397config KASAN_SHADOW_OFFSET 398 hex 399 depends on KASAN 400 default 0xe0000000 401