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1# SPDX-License-Identifier: GPL-2.0
2menu "Kernel hacking"
3
4source "lib/Kconfig.debug"
5
6config 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
18config PPC_WERROR
19 bool
20 depends on !PPC_DISABLE_WERROR
21 default y
22
23config 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
32config HCALL_STATS
33 bool "Hypervisor call instrumentation"
34 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
35 help
36 Adds code to keep track of the number of hypervisor calls made and
37 the amount of time spent in hypervisor calls. Wall time spent in
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
46config 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
59config CODE_PATCHING_SELFTEST
60 bool "Run self-tests of the code-patching code"
61 depends on DEBUG_KERNEL
62 default n
63
64config 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
73config 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
83config FTR_FIXUP_SELFTEST
84 bool "Run self-tests of the feature-fixup code"
85 depends on DEBUG_KERNEL
86 default n
87
88config MSI_BITMAP_SELFTEST
89 bool "Run self-tests of the MSI bitmap code"
90 depends on DEBUG_KERNEL
91 default n
92
93config PPC_IRQ_SOFT_MASK_DEBUG
94 bool "Include extra checks for powerpc irq soft masking"
95 default n
96
97config XMON
98 bool "Include xmon kernel debugger"
99 depends on DEBUG_KERNEL
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.
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.
110 xmon will print a backtrace on the very first invocation.
111 'xmon=nobt' will disable this autobacktrace.
112
113config 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
120config 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
129config DEBUGGER
130 bool
131 depends on KGDB || XMON
132 default y
133
134config BDI_SWITCH
135 bool "Include BDI-2000 user context switcher"
136 depends on DEBUG_KERNEL && PPC32
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
142config BOOTX_TEXT
143 bool "Support for early boot text console (BootX or OpenFirmware only)"
144 depends on PPC_BOOK3S
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
149config PPC_EARLY_DEBUG
150 bool "Early debugging (dangerous)"
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
158
159choice
160 prompt "Early debugging console"
161 depends on PPC_EARLY_DEBUG
162 help
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_.
166
167config 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
174config PPC_EARLY_DEBUG_LPAR
175 bool "LPAR HV Console"
176 depends on PPC_PSERIES && HVC_CONSOLE
177 help
178 Select this to enable early debugging for a machine with a HVC
179 console on vterm 0.
180
181config PPC_EARLY_DEBUG_LPAR_HVSI
182 bool "LPAR HVSI Console"
183 depends on PPC_PSERIES && HVC_CONSOLE
184 help
185 Select this to enable early debugging for a machine with a HVSI
186 console on a specified vterm.
187
188config 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
194config PPC_EARLY_DEBUG_RTAS_PANEL
195 bool "RTAS Panel"
196 depends on PPC_RTAS
197 help
198 Select this to enable early debugging via the RTAS panel.
199
200config 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
207config 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
213config 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
220config PPC_EARLY_DEBUG_44x
221 bool "Early serial debugging for IBM/AMCC 44x CPUs"
222 depends on 44x
223 help
224 Select this to enable early debugging for IBM 44x chips via the
225 inbuilt serial port. If you enable this, ensure you set
226 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
227
228config 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
236config PPC_EARLY_DEBUG_CPM
237 bool "Early serial debugging for Freescale CPM-based serial ports"
238 depends on SERIAL_CPM
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
244config 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
252config 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
260config 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
267config 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
274config 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.
281endchoice
282
283config 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
291config 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
299config PPC_EARLY_DEBUG_OPAL
300 def_bool y
301 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
302
303
304config 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
312config 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
320 On OPAL v2, this will be 0 for network console and 1 or 2 for
321 the machine built-in serial ports.
322
323config PPC_EARLY_DEBUG_44x_PHYSLOW
324 hex "Low 32 bits of early debug UART physical address"
325 depends on PPC_EARLY_DEBUG_44x
326 default "0x40000200"
327 help
328 You probably want 0x40000200 for ebony boards and
329 0x40000300 for taishan
330
331config PPC_EARLY_DEBUG_44x_PHYSHIGH
332 hex "EPRN of early debug UART physical address"
333 depends on PPC_EARLY_DEBUG_44x
334 default "0x1"
335
336config PPC_EARLY_DEBUG_40x_PHYSADDR
337 hex "Early debug UART physical address"
338 depends on PPC_EARLY_DEBUG_40x
339 default "0xef600300"
340
341config PPC_EARLY_DEBUG_CPM_ADDR
342 hex "CPM UART early debug transmit descriptor address"
343 depends on PPC_EARLY_DEBUG_CPM
344 default "0xfa202008" if PPC_EP88XC
345 default "0xf0001ff8" if CPM2
346 default "0xff002008" if CPM1
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
353config 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
362config PPC_PTDUMP
363 bool "Export kernel pagetable layout to userspace via debugfs"
364 depends on DEBUG_KERNEL && DEBUG_FS
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
373config PPC_HTDUMP
374 def_bool y
375 depends on PPC_PTDUMP && PPC_BOOK3S_64
376
377config 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
383endmenu
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