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 GUEST_STATE_BUFFER_TEST 86 def_tristate n 87 prompt "Enable Guest State Buffer unit tests" 88 depends on KUNIT 89 depends on KVM_BOOK3S_HV_POSSIBLE 90 default KUNIT_ALL_TESTS 91 help 92 The Guest State Buffer is a data format specified in the PAPR. 93 It is by hcalls to communicate the state of L2 guests between 94 the L1 and L0 hypervisors. Enable unit tests for the library 95 used to create and use guest state buffers. 96 97config PPC_IRQ_SOFT_MASK_DEBUG 98 bool "Include extra checks for powerpc irq soft masking" 99 depends on PPC64 100 101config PPC_RFI_SRR_DEBUG 102 bool "Include extra checks for RFI SRR register validity" 103 depends on PPC_BOOK3S_64 104 105config XMON 106 bool "Include xmon kernel debugger" 107 depends on DEBUG_KERNEL 108 select CONSOLE_POLL if SERIAL_CPM_CONSOLE 109 help 110 Include in-kernel hooks for the xmon kernel monitor/debugger. 111 Unless you are intending to debug the kernel, say N here. 112 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise 113 nothing will appear on the screen (xmon writes directly to the 114 framebuffer memory). 115 The cmdline option 'xmon' or 'xmon=early' will drop into xmon 116 very early during boot. 'xmon=on' will just enable the xmon 117 debugger hooks. 'xmon=off' will disable the debugger hooks 118 if CONFIG_XMON_DEFAULT is set. 119 xmon will print a backtrace on the very first invocation. 120 'xmon=nobt' will disable this autobacktrace. 121 122config XMON_DEFAULT 123 bool "Enable xmon by default" 124 depends on XMON 125 help 126 xmon is normally disabled unless booted with 'xmon=on'. 127 Use 'xmon=off' to disable xmon init during runtime. 128 129config XMON_DISASSEMBLY 130 bool "Include disassembly support in xmon" 131 depends on XMON 132 default y 133 help 134 Include support for disassembling in xmon. You probably want 135 to say Y here, unless you're building for a memory-constrained 136 system. 137 138config XMON_DEFAULT_RO_MODE 139 bool "Restrict xmon to read-only operations by default" 140 depends on XMON 141 default y 142 help 143 Operate xmon in read-only mode. The cmdline options 'xmon=rw' and 144 'xmon=ro' override this default. 145 146config DEBUGGER 147 bool 148 depends on KGDB || XMON 149 default y 150 151config BDI_SWITCH 152 bool "Include BDI-2000 user context switcher" 153 depends on DEBUG_KERNEL && PPC32 154 help 155 Include in-kernel support for the Abatron BDI2000 debugger. 156 Unless you are intending to debug the kernel with one of these 157 machines, say N here. 158 159config BOOTX_TEXT 160 bool "Support for early boot text console (BootX or OpenFirmware only)" 161 depends on PPC_BOOK3S 162 select FONT_SUN8x16 163 select FONT_SUPPORT 164 help 165 Say Y here to see progress messages from the boot firmware in text 166 mode. Requires either BootX or Open Firmware. 167 168config PPC_EARLY_DEBUG 169 bool "Early debugging (dangerous)" 170 help 171 Say Y to enable some early debugging facilities that may be available 172 for your processor/board combination. Those facilities are hacks 173 intended to debug problems early during boot, this should not be 174 enabled in a production kernel. 175 Note that enabling this will also cause the kernel default log level 176 to be pushed to max automatically very early during boot 177 178choice 179 prompt "Early debugging console" 180 depends on PPC_EARLY_DEBUG 181 help 182 Use the selected console for early debugging. Careful, if you 183 enable debugging for the wrong type of machine your kernel 184 _will not boot_. 185 186config PPC_EARLY_DEBUG_BOOTX 187 bool "BootX or OpenFirmware" 188 depends on BOOTX_TEXT 189 help 190 Select this to enable early debugging for a machine using BootX 191 or OpenFirmware. 192 193config PPC_EARLY_DEBUG_LPAR 194 bool "LPAR HV Console" 195 depends on PPC_PSERIES && HVC_CONSOLE 196 help 197 Select this to enable early debugging for a machine with a HVC 198 console on vterm 0. 199 200config PPC_EARLY_DEBUG_LPAR_HVSI 201 bool "LPAR HVSI Console" 202 depends on PPC_PSERIES && HVC_CONSOLE 203 help 204 Select this to enable early debugging for a machine with a HVSI 205 console on a specified vterm. 206 207config PPC_EARLY_DEBUG_G5 208 bool "Apple G5" 209 depends on PPC_PMAC64 210 help 211 Select this to enable early debugging for Apple G5 machines. 212 213config PPC_EARLY_DEBUG_RTAS_PANEL 214 bool "RTAS Panel" 215 depends on PPC_RTAS 216 help 217 Select this to enable early debugging via the RTAS panel. 218 219config PPC_EARLY_DEBUG_RTAS_CONSOLE 220 bool "RTAS Console" 221 depends on PPC_RTAS 222 select UDBG_RTAS_CONSOLE 223 help 224 Select this to enable early debugging via the RTAS console. 225 226config PPC_EARLY_DEBUG_MAPLE 227 bool "Maple real mode" 228 depends on PPC_MAPLE 229 help 230 Select this to enable early debugging for Maple. 231 232config PPC_EARLY_DEBUG_PAS_REALMODE 233 bool "PA Semi real mode" 234 depends on PPC_PASEMI 235 help 236 Select this to enable early debugging for PA Semi. 237 Output will be on UART0. 238 239config PPC_EARLY_DEBUG_44x 240 bool "Early serial debugging for IBM/AMCC 44x CPUs" 241 depends on 44x 242 help 243 Select this to enable early debugging for IBM 44x chips via the 244 inbuilt serial port. If you enable this, ensure you set 245 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. 246 247config PPC_EARLY_DEBUG_CPM 248 bool "Early serial debugging for Freescale CPM-based serial ports" 249 depends on SERIAL_CPM=y 250 help 251 Select this to enable early debugging for Freescale chips 252 using a CPM-based serial port. This assumes that the bootwrapper 253 has run, and set up the CPM in a particular way. 254 255config PPC_EARLY_DEBUG_USBGECKO 256 bool "Early debugging through the USB Gecko adapter" 257 depends on GAMECUBE_COMMON 258 select USBGECKO_UDBG 259 help 260 Select this to enable early debugging for Nintendo GameCube/Wii 261 consoles via an external USB Gecko adapter. 262 263config PPC_EARLY_DEBUG_PS3GELIC 264 bool "Early debugging through the PS3 Ethernet port" 265 depends on PPC_PS3 266 help 267 Select this to enable early debugging for the PlayStation3 via 268 UDP broadcasts sent out through the Ethernet port. 269 270config PPC_EARLY_DEBUG_OPAL_RAW 271 bool "OPAL raw console" 272 depends on HVC_OPAL 273 help 274 Select this to enable early debugging for the PowerNV platform 275 using a "raw" console 276 277config PPC_EARLY_DEBUG_OPAL_HVSI 278 bool "OPAL hvsi console" 279 depends on HVC_OPAL 280 help 281 Select this to enable early debugging for the PowerNV platform 282 using an "hvsi" console 283 284config PPC_EARLY_DEBUG_MEMCONS 285 bool "In memory console" 286 help 287 Select this to enable early debugging using an in memory console. 288 This console provides input and output buffers stored within the 289 kernel BSS and should be safe to select on any system. A debugger 290 can then be used to read kernel output or send input to the console. 291 292config PPC_EARLY_DEBUG_16550 293 bool "Serial 16550" 294 depends on PPC_UDBG_16550 295 help 296 Select this to enable early debugging via Serial 16550 console 297endchoice 298 299config PPC_MEMCONS_OUTPUT_SIZE 300 int "In memory console output buffer size" 301 depends on PPC_EARLY_DEBUG_MEMCONS 302 default 4096 303 help 304 Selects the size of the output buffer (in bytes) of the in memory 305 console. 306 307config PPC_MEMCONS_INPUT_SIZE 308 int "In memory console input buffer size" 309 depends on PPC_EARLY_DEBUG_MEMCONS 310 default 128 311 help 312 Selects the size of the input buffer (in bytes) of the in memory 313 console. 314 315config PPC_EARLY_DEBUG_OPAL 316 def_bool y 317 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI 318 319config PPC_EARLY_DEBUG_HVSI_VTERMNO 320 hex "vterm number to use with early debug HVSI" 321 depends on PPC_EARLY_DEBUG_LPAR_HVSI 322 default "0x30000000" 323 help 324 You probably want 0x30000000 for your first serial port and 325 0x30000001 for your second one 326 327config PPC_EARLY_DEBUG_OPAL_VTERMNO 328 hex "vterm number to use with OPAL early debug" 329 depends on PPC_EARLY_DEBUG_OPAL 330 default "0" 331 help 332 This correspond to which /dev/hvcN you want to use for early 333 debug. 334 335 On OPAL v2, this will be 0 for network console and 1 or 2 for 336 the machine built-in serial ports. 337 338config PPC_EARLY_DEBUG_44x_PHYSLOW 339 hex "Low 32 bits of early debug UART physical address" 340 depends on PPC_EARLY_DEBUG_44x 341 default "0x40000200" 342 help 343 You probably want 0x40000200 for ebony boards and 344 0x40000300 for taishan 345 346config PPC_EARLY_DEBUG_44x_PHYSHIGH 347 hex "EPRN of early debug UART physical address" 348 depends on PPC_EARLY_DEBUG_44x 349 default "0x1" 350 351config PPC_EARLY_DEBUG_CPM_ADDR 352 hex "CPM UART early debug transmit descriptor address" 353 depends on PPC_EARLY_DEBUG_CPM 354 default "0xfa202008" if PPC_EP88XC 355 default "0xf0001ff8" if CPM2 356 default "0xff002008" if CPM1 357 help 358 This specifies the address of the transmit descriptor 359 used for early debug output. Because it is needed before 360 platform probing is done, all platforms selected must 361 share the same address. 362 363config PPC_EARLY_DEBUG_16550_PHYSADDR 364 hex "Early debug Serial 16550 physical address" 365 depends on PPC_EARLY_DEBUG_16550 366 367config PPC_EARLY_DEBUG_16550_STRIDE 368 int "Early debug Serial 16550 stride" 369 depends on PPC_EARLY_DEBUG_16550 370 default 1 371 372config FAIL_IOMMU 373 bool "Fault-injection capability for IOMMU" 374 depends on FAULT_INJECTION 375 depends on PCI || IBMVIO 376 help 377 Provide fault-injection capability for IOMMU. Each device can 378 be selectively enabled via the fail_iommu property. 379 380 If you are unsure, say N. 381 382config PPC_FAST_ENDIAN_SWITCH 383 bool "Deprecated fast endian-switch syscall" 384 depends on DEBUG_KERNEL && PPC_BOOK3S_64 385 help 386 If you're unsure what this is, say N. 387 388config KASAN_SHADOW_OFFSET 389 hex 390 depends on KASAN 391 default 0xe0000000 if PPC32 392 default 0xa80e000000000000 if PPC_BOOK3S_64 393 default 0xa8001c0000000000 if PPC_BOOK3E_64 394