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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
14cf11af PM |
2 | menu "Kernel hacking" |
3 | ||
4 | source "lib/Kconfig.debug" | |
5 | ||
ba55bd74 ME |
6 | config PPC_DISABLE_WERROR |
7 | bool "Don't build arch/powerpc code with -Werror" | |
8 | default n | |
9 | help | |
10 | This option tells the compiler NOT to build the code under | |
11 | arch/powerpc with the -Werror flag (which means warnings | |
12 | are treated as errors). | |
13 | ||
14 | Only enable this if you are hitting a build failure in the | |
15 | arch/powerpc code caused by a warning, and you don't feel | |
16 | inclined to fix it. | |
17 | ||
18 | config PPC_WERROR | |
19 | bool | |
20 | depends on !PPC_DISABLE_WERROR | |
21 | default y | |
22 | ||
c4d04be1 JB |
23 | config PRINT_STACK_DEPTH |
24 | int "Stack depth to print" if DEBUG_KERNEL | |
25 | default 64 | |
26 | help | |
27 | This option allows you to set the stack depth that the kernel | |
28 | prints in stack traces. This can be useful if your display is | |
29 | too small and stack traces cause important information to | |
30 | scroll off the screen. | |
31 | ||
57852a85 MK |
32 | config HCALL_STATS |
33 | bool "Hypervisor call instrumentation" | |
c8cd093a | 34 | depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS |
57852a85 MK |
35 | help |
36 | Adds code to keep track of the number of hypervisor calls made and | |
3dde6ad8 | 37 | the amount of time spent in hypervisor calls. Wall time spent in |
57852a85 MK |
38 | each call is always calculated, and if available CPU cycles spent |
39 | are also calculated. A directory named hcall_inst is added at the | |
40 | root of the debugfs filesystem. Within the hcall_inst directory | |
41 | are files that contain CPU specific call statistics. | |
42 | ||
43 | This option will add a small amount of overhead to all hypervisor | |
44 | calls. | |
45 | ||
80947e7c GU |
46 | config PPC_EMULATED_STATS |
47 | bool "Emulated instructions tracking" | |
48 | depends on DEBUG_FS | |
49 | help | |
50 | Adds code to keep track of the number of instructions that are | |
51 | emulated by the in-kernel emulator. Counters for the various classes | |
52 | of emulated instructions are available under | |
53 | powerpc/emulated_instructions/ in the root of the debugfs file | |
54 | system. Optionally (controlled by | |
55 | powerpc/emulated_instructions/do_warn in debugfs), rate-limited | |
56 | warnings can be printed to the console when instructions are | |
57 | emulated. | |
58 | ||
ae0dc736 | 59 | config CODE_PATCHING_SELFTEST |
759fb100 | 60 | bool "Run self-tests of the code-patching code" |
ae0dc736 ME |
61 | depends on DEBUG_KERNEL |
62 | default n | |
63 | ||
bfbfc8a4 ME |
64 | config JUMP_LABEL_FEATURE_CHECKS |
65 | bool "Enable use of jump label for cpu/mmu_has_feature()" | |
66 | depends on JUMP_LABEL | |
67 | default y | |
68 | help | |
69 | Selecting this options enables use of jump labels for some internal | |
70 | feature checks. This should generate more optimal code for those | |
71 | checks. | |
72 | ||
c812c7d8 AK |
73 | config JUMP_LABEL_FEATURE_CHECK_DEBUG |
74 | bool "Do extra check on feature fixup calls" | |
75 | depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS | |
76 | default n | |
77 | help | |
78 | This tries to catch incorrect usage of cpu_has_feature() and | |
79 | mmu_has_feature() in the code. | |
80 | ||
81 | If you don't know what this means, say N. | |
82 | ||
362e7701 | 83 | config FTR_FIXUP_SELFTEST |
759fb100 | 84 | bool "Run self-tests of the feature-fixup code" |
362e7701 ME |
85 | depends on DEBUG_KERNEL |
86 | default n | |
87 | ||
7e302869 | 88 | config MSI_BITMAP_SELFTEST |
759fb100 | 89 | bool "Run self-tests of the MSI bitmap code" |
7e302869 ME |
90 | depends on DEBUG_KERNEL |
91 | default n | |
92 | ||
9aa88188 MS |
93 | config PPC_IRQ_SOFT_MASK_DEBUG |
94 | bool "Include extra checks for powerpc irq soft masking" | |
95 | default n | |
96 | ||
14cf11af PM |
97 | config XMON |
98 | bool "Include xmon kernel debugger" | |
17ce452f | 99 | depends on DEBUG_KERNEL |
14cf11af PM |
100 | help |
101 | Include in-kernel hooks for the xmon kernel monitor/debugger. | |
102 | Unless you are intending to debug the kernel, say N here. | |
ff64208d PM |
103 | Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise |
104 | nothing will appear on the screen (xmon writes directly to the | |
105 | framebuffer memory). | |
106 | The cmdline option 'xmon' or 'xmon=early' will drop into xmon | |
107 | very early during boot. 'xmon=on' will just enable the xmon | |
108 | debugger hooks. 'xmon=off' will disable the debugger hooks | |
109 | if CONFIG_XMON_DEFAULT is set. | |
26c8af5f OH |
110 | xmon will print a backtrace on the very first invocation. |
111 | 'xmon=nobt' will disable this autobacktrace. | |
ff64208d PM |
112 | |
113 | config XMON_DEFAULT | |
114 | bool "Enable xmon by default" | |
115 | depends on XMON | |
116 | help | |
117 | xmon is normally disabled unless booted with 'xmon=on'. | |
118 | Use 'xmon=off' to disable xmon init during runtime. | |
119 | ||
e0426047 ME |
120 | config XMON_DISASSEMBLY |
121 | bool "Include disassembly support in xmon" | |
122 | depends on XMON | |
123 | default y | |
124 | help | |
125 | Include support for disassembling in xmon. You probably want | |
126 | to say Y here, unless you're building for a memory-constrained | |
127 | system. | |
128 | ||
17ce452f JW |
129 | config DEBUGGER |
130 | bool | |
131 | depends on KGDB || XMON | |
132 | default y | |
133 | ||
14cf11af PM |
134 | config BDI_SWITCH |
135 | bool "Include BDI-2000 user context switcher" | |
ff64208d | 136 | depends on DEBUG_KERNEL && PPC32 |
14cf11af PM |
137 | help |
138 | Include in-kernel support for the Abatron BDI2000 debugger. | |
139 | Unless you are intending to debug the kernel with one of these | |
140 | machines, say N here. | |
141 | ||
142 | config BOOTX_TEXT | |
143 | bool "Support for early boot text console (BootX or OpenFirmware only)" | |
52d99627 | 144 | depends on PPC_BOOK3S |
14cf11af PM |
145 | help |
146 | Say Y here to see progress messages from the boot firmware in text | |
147 | mode. Requires either BootX or Open Firmware. | |
148 | ||
485a2d54 ME |
149 | config PPC_EARLY_DEBUG |
150 | bool "Early debugging (dangerous)" | |
7ee17466 BH |
151 | help |
152 | Say Y to enable some early debugging facilities that may be available | |
153 | for your processor/board combination. Those facilities are hacks | |
154 | intended to debug problems early during boot, this should not be | |
155 | enabled in a production kernel. | |
156 | Note that enabling this will also cause the kernel default log level | |
157 | to be pushed to max automatically very early during boot | |
485a2d54 | 158 | |
296167ae | 159 | choice |
485a2d54 ME |
160 | prompt "Early debugging console" |
161 | depends on PPC_EARLY_DEBUG | |
296167ae | 162 | help |
485a2d54 ME |
163 | Use the selected console for early debugging. Careful, if you |
164 | enable debugging for the wrong type of machine your kernel | |
165 | _will not boot_. | |
296167ae | 166 | |
071df942 AP |
167 | config PPC_EARLY_DEBUG_BOOTX |
168 | bool "BootX or OpenFirmware" | |
169 | depends on BOOTX_TEXT | |
170 | help | |
171 | Select this to enable early debugging for a machine using BootX | |
172 | or OpenFirmware. | |
173 | ||
296167ae ME |
174 | config PPC_EARLY_DEBUG_LPAR |
175 | bool "LPAR HV Console" | |
23697760 | 176 | depends on PPC_PSERIES && HVC_CONSOLE |
296167ae ME |
177 | help |
178 | Select this to enable early debugging for a machine with a HVC | |
179 | console on vterm 0. | |
180 | ||
4d2bb3f5 BH |
181 | config PPC_EARLY_DEBUG_LPAR_HVSI |
182 | bool "LPAR HVSI Console" | |
23697760 | 183 | depends on PPC_PSERIES && HVC_CONSOLE |
4d2bb3f5 BH |
184 | help |
185 | Select this to enable early debugging for a machine with a HVSI | |
186 | console on a specified vterm. | |
187 | ||
296167ae ME |
188 | config PPC_EARLY_DEBUG_G5 |
189 | bool "Apple G5" | |
190 | depends on PPC_PMAC64 | |
191 | help | |
192 | Select this to enable early debugging for Apple G5 machines. | |
193 | ||
cc46bb98 | 194 | config PPC_EARLY_DEBUG_RTAS_PANEL |
296167ae ME |
195 | bool "RTAS Panel" |
196 | depends on PPC_RTAS | |
197 | help | |
198 | Select this to enable early debugging via the RTAS panel. | |
199 | ||
cc46bb98 ME |
200 | config PPC_EARLY_DEBUG_RTAS_CONSOLE |
201 | bool "RTAS Console" | |
202 | depends on PPC_RTAS | |
203 | select UDBG_RTAS_CONSOLE | |
204 | help | |
205 | Select this to enable early debugging via the RTAS console. | |
206 | ||
296167ae ME |
207 | config PPC_EARLY_DEBUG_MAPLE |
208 | bool "Maple real mode" | |
209 | depends on PPC_MAPLE | |
210 | help | |
211 | Select this to enable early debugging for Maple. | |
212 | ||
39c870d5 OJ |
213 | config PPC_EARLY_DEBUG_PAS_REALMODE |
214 | bool "PA Semi real mode" | |
215 | depends on PPC_PASEMI | |
216 | help | |
217 | Select this to enable early debugging for PA Semi. | |
218 | Output will be on UART0. | |
219 | ||
d9b55a03 DG |
220 | config PPC_EARLY_DEBUG_44x |
221 | bool "Early serial debugging for IBM/AMCC 44x CPUs" | |
b2677b8d | 222 | depends on 44x |
d9b55a03 DG |
223 | help |
224 | Select this to enable early debugging for IBM 44x chips via the | |
6bbc5476 HB |
225 | inbuilt serial port. If you enable this, ensure you set |
226 | PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. | |
d9b55a03 | 227 | |
9dae8afd BH |
228 | config PPC_EARLY_DEBUG_40x |
229 | bool "Early serial debugging for IBM/AMCC 40x CPUs" | |
230 | depends on 40x | |
231 | help | |
232 | Select this to enable early debugging for IBM 40x chips via the | |
233 | inbuilt serial port. This works on chips with a 16550 compatible | |
234 | UART. Xilinx chips with uartlite cannot use this option. | |
235 | ||
c374e00e SW |
236 | config PPC_EARLY_DEBUG_CPM |
237 | bool "Early serial debugging for Freescale CPM-based serial ports" | |
238 | depends on SERIAL_CPM | |
c374e00e SW |
239 | help |
240 | Select this to enable early debugging for Freescale chips | |
241 | using a CPM-based serial port. This assumes that the bootwrapper | |
242 | has run, and set up the CPM in a particular way. | |
243 | ||
d1d56f8c AH |
244 | config PPC_EARLY_DEBUG_USBGECKO |
245 | bool "Early debugging through the USB Gecko adapter" | |
246 | depends on GAMECUBE_COMMON | |
247 | select USBGECKO_UDBG | |
248 | help | |
249 | Select this to enable early debugging for Nintendo GameCube/Wii | |
250 | consoles via an external USB Gecko adapter. | |
251 | ||
c26afe9e HM |
252 | config PPC_EARLY_DEBUG_PS3GELIC |
253 | bool "Early debugging through the PS3 Ethernet port" | |
254 | depends on PPC_PS3 | |
255 | select PS3GELIC_UDBG | |
256 | help | |
257 | Select this to enable early debugging for the PlayStation3 via | |
258 | UDP broadcasts sent out through the Ethernet port. | |
259 | ||
daea1175 BH |
260 | config PPC_EARLY_DEBUG_OPAL_RAW |
261 | bool "OPAL raw console" | |
262 | depends on HVC_OPAL | |
263 | help | |
264 | Select this to enable early debugging for the PowerNV platform | |
265 | using a "raw" console | |
266 | ||
267 | config PPC_EARLY_DEBUG_OPAL_HVSI | |
268 | bool "OPAL hvsi console" | |
269 | depends on HVC_OPAL | |
270 | help | |
271 | Select this to enable early debugging for the PowerNV platform | |
272 | using an "hvsi" console | |
273 | ||
30650239 AP |
274 | config PPC_EARLY_DEBUG_MEMCONS |
275 | bool "In memory console" | |
276 | help | |
277 | Select this to enable early debugging using an in memory console. | |
278 | This console provides input and output buffers stored within the | |
279 | kernel BSS and should be safe to select on any system. A debugger | |
280 | can then be used to read kernel output or send input to the console. | |
296167ae ME |
281 | endchoice |
282 | ||
30650239 AP |
283 | config PPC_MEMCONS_OUTPUT_SIZE |
284 | int "In memory console output buffer size" | |
285 | depends on PPC_EARLY_DEBUG_MEMCONS | |
286 | default 4096 | |
287 | help | |
288 | Selects the size of the output buffer (in bytes) of the in memory | |
289 | console. | |
290 | ||
291 | config PPC_MEMCONS_INPUT_SIZE | |
292 | int "In memory console input buffer size" | |
293 | depends on PPC_EARLY_DEBUG_MEMCONS | |
294 | default 128 | |
295 | help | |
296 | Selects the size of the input buffer (in bytes) of the in memory | |
297 | console. | |
298 | ||
daea1175 BH |
299 | config PPC_EARLY_DEBUG_OPAL |
300 | def_bool y | |
301 | depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI | |
302 | ||
303 | ||
4d2bb3f5 BH |
304 | config PPC_EARLY_DEBUG_HVSI_VTERMNO |
305 | hex "vterm number to use with early debug HVSI" | |
306 | depends on PPC_EARLY_DEBUG_LPAR_HVSI | |
307 | default "0x30000000" | |
308 | help | |
309 | You probably want 0x30000000 for your first serial port and | |
310 | 0x30000001 for your second one | |
311 | ||
daea1175 BH |
312 | config PPC_EARLY_DEBUG_OPAL_VTERMNO |
313 | hex "vterm number to use with OPAL early debug" | |
314 | depends on PPC_EARLY_DEBUG_OPAL | |
315 | default "0" | |
316 | help | |
317 | This correspond to which /dev/hvcN you want to use for early | |
318 | debug. | |
319 | ||
daea1175 BH |
320 | On OPAL v2, this will be 0 for network console and 1 or 2 for |
321 | the machine built-in serial ports. | |
322 | ||
d9b55a03 DG |
323 | config PPC_EARLY_DEBUG_44x_PHYSLOW |
324 | hex "Low 32 bits of early debug UART physical address" | |
247537b9 | 325 | depends on PPC_EARLY_DEBUG_44x |
d9b55a03 | 326 | default "0x40000200" |
6bbc5476 HB |
327 | help |
328 | You probably want 0x40000200 for ebony boards and | |
329 | 0x40000300 for taishan | |
d9b55a03 DG |
330 | |
331 | config PPC_EARLY_DEBUG_44x_PHYSHIGH | |
332 | hex "EPRN of early debug UART physical address" | |
247537b9 | 333 | depends on PPC_EARLY_DEBUG_44x |
d9b55a03 DG |
334 | default "0x1" |
335 | ||
9dae8afd BH |
336 | config PPC_EARLY_DEBUG_40x_PHYSADDR |
337 | hex "Early debug UART physical address" | |
338 | depends on PPC_EARLY_DEBUG_40x | |
339 | default "0xef600300" | |
340 | ||
c374e00e SW |
341 | config PPC_EARLY_DEBUG_CPM_ADDR |
342 | hex "CPM UART early debug transmit descriptor address" | |
343 | depends on PPC_EARLY_DEBUG_CPM | |
15f8c604 | 344 | default "0xfa202008" if PPC_EP88XC |
c2dd3529 | 345 | default "0xf0001ff8" if CPM2 |
15f8c604 | 346 | default "0xff002008" if CPM1 |
c374e00e SW |
347 | help |
348 | This specifies the address of the transmit descriptor | |
349 | used for early debug output. Because it is needed before | |
350 | platform probing is done, all platforms selected must | |
351 | share the same address. | |
352 | ||
d6b9a81b AB |
353 | config FAIL_IOMMU |
354 | bool "Fault-injection capability for IOMMU" | |
355 | depends on FAULT_INJECTION | |
356 | help | |
357 | Provide fault-injection capability for IOMMU. Each device can | |
358 | be selectively enabled via the fail_iommu property. | |
359 | ||
360 | If you are unsure, say N. | |
361 | ||
8eb07b18 RG |
362 | config PPC_PTDUMP |
363 | bool "Export kernel pagetable layout to userspace via debugfs" | |
1c877f71 | 364 | depends on DEBUG_KERNEL && DEBUG_FS |
8eb07b18 RG |
365 | help |
366 | This option exports the state of the kernel pagetables to a | |
367 | debugfs file. This is only useful for kernel developers who are | |
368 | working in architecture specific areas of the kernel - probably | |
369 | not a good idea to enable this feature in a production kernel. | |
370 | ||
371 | If you are unsure, say N. | |
372 | ||
dd5ac03e ME |
373 | config PPC_HTDUMP |
374 | def_bool y | |
94d3084a | 375 | depends on PPC_PTDUMP && PPC_BOOK3S_64 |
dd5ac03e | 376 | |
727f1361 ME |
377 | config PPC_FAST_ENDIAN_SWITCH |
378 | bool "Deprecated fast endian-switch syscall" | |
379 | depends on DEBUG_KERNEL && PPC_BOOK3S_64 | |
380 | help | |
381 | If you're unsure what this is, say N. | |
382 | ||
14cf11af | 383 | endmenu |