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1menu "Kernel hacking"
2
3source "lib/Kconfig.debug"
4
5config PPC_DISABLE_WERROR
6 bool "Don't build arch/powerpc code with -Werror"
7 default n
8 help
9 This option tells the compiler NOT to build the code under
10 arch/powerpc with the -Werror flag (which means warnings
11 are treated as errors).
12
13 Only enable this if you are hitting a build failure in the
14 arch/powerpc code caused by a warning, and you don't feel
15 inclined to fix it.
16
17config PPC_WERROR
18 bool
19 depends on !PPC_DISABLE_WERROR
20 default y
21
22config PRINT_STACK_DEPTH
23 int "Stack depth to print" if DEBUG_KERNEL
24 default 64
25 help
26 This option allows you to set the stack depth that the kernel
27 prints in stack traces. This can be useful if your display is
28 too small and stack traces cause important information to
29 scroll off the screen.
30
31config DEBUG_STACKOVERFLOW
32 bool "Check for stack overflows"
33 depends on DEBUG_KERNEL
34 help
35 This option will cause messages to be printed if free stack space
36 drops below a certain limit.
37
38config HCALL_STATS
39 bool "Hypervisor call instrumentation"
40 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
41 help
42 Adds code to keep track of the number of hypervisor calls made and
43 the amount of time spent in hypervisor calls. Wall time spent in
44 each call is always calculated, and if available CPU cycles spent
45 are also calculated. A directory named hcall_inst is added at the
46 root of the debugfs filesystem. Within the hcall_inst directory
47 are files that contain CPU specific call statistics.
48
49 This option will add a small amount of overhead to all hypervisor
50 calls.
51
52config PPC_EMULATED_STATS
53 bool "Emulated instructions tracking"
54 depends on DEBUG_FS
55 help
56 Adds code to keep track of the number of instructions that are
57 emulated by the in-kernel emulator. Counters for the various classes
58 of emulated instructions are available under
59 powerpc/emulated_instructions/ in the root of the debugfs file
60 system. Optionally (controlled by
61 powerpc/emulated_instructions/do_warn in debugfs), rate-limited
62 warnings can be printed to the console when instructions are
63 emulated.
64
65config CODE_PATCHING_SELFTEST
66 bool "Run self-tests of the code-patching code."
67 depends on DEBUG_KERNEL
68 default n
69
70config FTR_FIXUP_SELFTEST
71 bool "Run self-tests of the feature-fixup code."
72 depends on DEBUG_KERNEL
73 default n
74
75config MSI_BITMAP_SELFTEST
76 bool "Run self-tests of the MSI bitmap code."
77 depends on DEBUG_KERNEL
78 default n
79
80config XMON
81 bool "Include xmon kernel debugger"
82 depends on DEBUG_KERNEL
83 help
84 Include in-kernel hooks for the xmon kernel monitor/debugger.
85 Unless you are intending to debug the kernel, say N here.
86 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
87 nothing will appear on the screen (xmon writes directly to the
88 framebuffer memory).
89 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
90 very early during boot. 'xmon=on' will just enable the xmon
91 debugger hooks. 'xmon=off' will disable the debugger hooks
92 if CONFIG_XMON_DEFAULT is set.
93 xmon will print a backtrace on the very first invocation.
94 'xmon=nobt' will disable this autobacktrace.
95
96config XMON_DEFAULT
97 bool "Enable xmon by default"
98 depends on XMON
99 help
100 xmon is normally disabled unless booted with 'xmon=on'.
101 Use 'xmon=off' to disable xmon init during runtime.
102
103config XMON_DISASSEMBLY
104 bool "Include disassembly support in xmon"
105 depends on XMON
106 default y
107 help
108 Include support for disassembling in xmon. You probably want
109 to say Y here, unless you're building for a memory-constrained
110 system.
111
112config DEBUGGER
113 bool
114 depends on KGDB || XMON
115 default y
116
117config BDI_SWITCH
118 bool "Include BDI-2000 user context switcher"
119 depends on DEBUG_KERNEL && PPC32
120 help
121 Include in-kernel support for the Abatron BDI2000 debugger.
122 Unless you are intending to debug the kernel with one of these
123 machines, say N here.
124
125config BOOTX_TEXT
126 bool "Support for early boot text console (BootX or OpenFirmware only)"
127 depends on PPC_OF && PPC_BOOK3S
128 help
129 Say Y here to see progress messages from the boot firmware in text
130 mode. Requires either BootX or Open Firmware.
131
132config PPC_EARLY_DEBUG
133 bool "Early debugging (dangerous)"
134 help
135 Say Y to enable some early debugging facilities that may be available
136 for your processor/board combination. Those facilities are hacks
137 intended to debug problems early during boot, this should not be
138 enabled in a production kernel.
139 Note that enabling this will also cause the kernel default log level
140 to be pushed to max automatically very early during boot
141
142choice
143 prompt "Early debugging console"
144 depends on PPC_EARLY_DEBUG
145 help
146 Use the selected console for early debugging. Careful, if you
147 enable debugging for the wrong type of machine your kernel
148 _will not boot_.
149
150config PPC_EARLY_DEBUG_LPAR
151 bool "LPAR HV Console"
152 depends on PPC_PSERIES
153 help
154 Select this to enable early debugging for a machine with a HVC
155 console on vterm 0.
156
157config PPC_EARLY_DEBUG_LPAR_HVSI
158 bool "LPAR HVSI Console"
159 depends on PPC_PSERIES
160 help
161 Select this to enable early debugging for a machine with a HVSI
162 console on a specified vterm.
163
164config PPC_EARLY_DEBUG_G5
165 bool "Apple G5"
166 depends on PPC_PMAC64
167 help
168 Select this to enable early debugging for Apple G5 machines.
169
170config PPC_EARLY_DEBUG_RTAS_PANEL
171 bool "RTAS Panel"
172 depends on PPC_RTAS
173 help
174 Select this to enable early debugging via the RTAS panel.
175
176config PPC_EARLY_DEBUG_RTAS_CONSOLE
177 bool "RTAS Console"
178 depends on PPC_RTAS
179 select UDBG_RTAS_CONSOLE
180 help
181 Select this to enable early debugging via the RTAS console.
182
183config PPC_EARLY_DEBUG_MAPLE
184 bool "Maple real mode"
185 depends on PPC_MAPLE
186 help
187 Select this to enable early debugging for Maple.
188
189config PPC_EARLY_DEBUG_PAS_REALMODE
190 bool "PA Semi real mode"
191 depends on PPC_PASEMI
192 help
193 Select this to enable early debugging for PA Semi.
194 Output will be on UART0.
195
196config PPC_EARLY_DEBUG_BEAT
197 bool "Beat HV Console"
198 depends on PPC_CELLEB
199 select PPC_UDBG_BEAT
200 help
201 Select this to enable early debugging for Celleb with Beat.
202
203config PPC_EARLY_DEBUG_44x
204 bool "Early serial debugging for IBM/AMCC 44x CPUs"
205 # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
206 # mark, which doesn't work with current 440 KVM.
207 depends on 44x && !KVM
208 help
209 Select this to enable early debugging for IBM 44x chips via the
210 inbuilt serial port. If you enable this, ensure you set
211 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
212
213config PPC_EARLY_DEBUG_40x
214 bool "Early serial debugging for IBM/AMCC 40x CPUs"
215 depends on 40x
216 help
217 Select this to enable early debugging for IBM 40x chips via the
218 inbuilt serial port. This works on chips with a 16550 compatible
219 UART. Xilinx chips with uartlite cannot use this option.
220
221config PPC_EARLY_DEBUG_CPM
222 bool "Early serial debugging for Freescale CPM-based serial ports"
223 depends on SERIAL_CPM
224 select PIN_TLB if PPC_8xx
225 help
226 Select this to enable early debugging for Freescale chips
227 using a CPM-based serial port. This assumes that the bootwrapper
228 has run, and set up the CPM in a particular way.
229
230config PPC_EARLY_DEBUG_USBGECKO
231 bool "Early debugging through the USB Gecko adapter"
232 depends on GAMECUBE_COMMON
233 select USBGECKO_UDBG
234 help
235 Select this to enable early debugging for Nintendo GameCube/Wii
236 consoles via an external USB Gecko adapter.
237
238config PPC_EARLY_DEBUG_WSP
239 bool "Early debugging via WSP's internal UART"
240 depends on PPC_WSP
241 select PPC_UDBG_16550
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
265endchoice
266
267config PPC_EARLY_DEBUG_OPAL
268 def_bool y
269 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
270
271
272config PPC_EARLY_DEBUG_HVSI_VTERMNO
273 hex "vterm number to use with early debug HVSI"
274 depends on PPC_EARLY_DEBUG_LPAR_HVSI
275 default "0x30000000"
276 help
277 You probably want 0x30000000 for your first serial port and
278 0x30000001 for your second one
279
280config PPC_EARLY_DEBUG_OPAL_VTERMNO
281 hex "vterm number to use with OPAL early debug"
282 depends on PPC_EARLY_DEBUG_OPAL
283 default "0"
284 help
285 This correspond to which /dev/hvcN you want to use for early
286 debug.
287
288 On OPAL v1 (takeover) this should always be 0
289 On OPAL v2, this will be 0 for network console and 1 or 2 for
290 the machine built-in serial ports.
291
292config PPC_EARLY_DEBUG_44x_PHYSLOW
293 hex "Low 32 bits of early debug UART physical address"
294 depends on PPC_EARLY_DEBUG_44x
295 default "0x40000200"
296 help
297 You probably want 0x40000200 for ebony boards and
298 0x40000300 for taishan
299
300config PPC_EARLY_DEBUG_44x_PHYSHIGH
301 hex "EPRN of early debug UART physical address"
302 depends on PPC_EARLY_DEBUG_44x
303 default "0x1"
304
305config PPC_EARLY_DEBUG_40x_PHYSADDR
306 hex "Early debug UART physical address"
307 depends on PPC_EARLY_DEBUG_40x
308 default "0xef600300"
309
310config PPC_EARLY_DEBUG_CPM_ADDR
311 hex "CPM UART early debug transmit descriptor address"
312 depends on PPC_EARLY_DEBUG_CPM
313 default "0xfa202008" if PPC_EP88XC
314 default "0xf0001ff8" if CPM2
315 default "0xff002008" if CPM1
316 help
317 This specifies the address of the transmit descriptor
318 used for early debug output. Because it is needed before
319 platform probing is done, all platforms selected must
320 share the same address.
321
322config STRICT_DEVMEM
323 def_bool y
324 prompt "Filter access to /dev/mem"
325 help
326 This option restricts access to /dev/mem. If this option is
327 disabled, you allow userspace access to all memory, including
328 kernel and userspace memory. Accidental memory access is likely
329 to be disastrous.
330 Memory access is required for experts who want to debug the kernel.
331
332 If you are unsure, say Y.
333
334endmenu
1menu "Kernel hacking"
2
3source "lib/Kconfig.debug"
4
5config PPC_DISABLE_WERROR
6 bool "Don't build arch/powerpc code with -Werror"
7 default n
8 help
9 This option tells the compiler NOT to build the code under
10 arch/powerpc with the -Werror flag (which means warnings
11 are treated as errors).
12
13 Only enable this if you are hitting a build failure in the
14 arch/powerpc code caused by a warning, and you don't feel
15 inclined to fix it.
16
17config PPC_WERROR
18 bool
19 depends on !PPC_DISABLE_WERROR
20 default y
21
22config STRICT_MM_TYPECHECKS
23 bool "Do extra type checking on mm types"
24 default n
25 help
26 This option turns on extra type checking for some mm related types.
27
28 If you don't know what this means, say N.
29
30config PRINT_STACK_DEPTH
31 int "Stack depth to print" if DEBUG_KERNEL
32 default 64
33 help
34 This option allows you to set the stack depth that the kernel
35 prints in stack traces. This can be useful if your display is
36 too small and stack traces cause important information to
37 scroll off the screen.
38
39config HCALL_STATS
40 bool "Hypervisor call instrumentation"
41 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
42 help
43 Adds code to keep track of the number of hypervisor calls made and
44 the amount of time spent in hypervisor calls. Wall time spent in
45 each call is always calculated, and if available CPU cycles spent
46 are also calculated. A directory named hcall_inst is added at the
47 root of the debugfs filesystem. Within the hcall_inst directory
48 are files that contain CPU specific call statistics.
49
50 This option will add a small amount of overhead to all hypervisor
51 calls.
52
53config PPC_EMULATED_STATS
54 bool "Emulated instructions tracking"
55 depends on DEBUG_FS
56 help
57 Adds code to keep track of the number of instructions that are
58 emulated by the in-kernel emulator. Counters for the various classes
59 of emulated instructions are available under
60 powerpc/emulated_instructions/ in the root of the debugfs file
61 system. Optionally (controlled by
62 powerpc/emulated_instructions/do_warn in debugfs), rate-limited
63 warnings can be printed to the console when instructions are
64 emulated.
65
66config CODE_PATCHING_SELFTEST
67 bool "Run self-tests of the code-patching code"
68 depends on DEBUG_KERNEL
69 default n
70
71config FTR_FIXUP_SELFTEST
72 bool "Run self-tests of the feature-fixup code"
73 depends on DEBUG_KERNEL
74 default n
75
76config MSI_BITMAP_SELFTEST
77 bool "Run self-tests of the MSI bitmap code"
78 depends on DEBUG_KERNEL
79 default n
80
81config XMON
82 bool "Include xmon kernel debugger"
83 depends on DEBUG_KERNEL
84 help
85 Include in-kernel hooks for the xmon kernel monitor/debugger.
86 Unless you are intending to debug the kernel, say N here.
87 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
88 nothing will appear on the screen (xmon writes directly to the
89 framebuffer memory).
90 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
91 very early during boot. 'xmon=on' will just enable the xmon
92 debugger hooks. 'xmon=off' will disable the debugger hooks
93 if CONFIG_XMON_DEFAULT is set.
94 xmon will print a backtrace on the very first invocation.
95 'xmon=nobt' will disable this autobacktrace.
96
97config XMON_DEFAULT
98 bool "Enable xmon by default"
99 depends on XMON
100 help
101 xmon is normally disabled unless booted with 'xmon=on'.
102 Use 'xmon=off' to disable xmon init during runtime.
103
104config XMON_DISASSEMBLY
105 bool "Include disassembly support in xmon"
106 depends on XMON
107 default y
108 help
109 Include support for disassembling in xmon. You probably want
110 to say Y here, unless you're building for a memory-constrained
111 system.
112
113config DEBUGGER
114 bool
115 depends on KGDB || XMON
116 default y
117
118config BDI_SWITCH
119 bool "Include BDI-2000 user context switcher"
120 depends on DEBUG_KERNEL && PPC32
121 help
122 Include in-kernel support for the Abatron BDI2000 debugger.
123 Unless you are intending to debug the kernel with one of these
124 machines, say N here.
125
126config BOOTX_TEXT
127 bool "Support for early boot text console (BootX or OpenFirmware only)"
128 depends on PPC_BOOK3S
129 help
130 Say Y here to see progress messages from the boot firmware in text
131 mode. Requires either BootX or Open Firmware.
132
133config PPC_EARLY_DEBUG
134 bool "Early debugging (dangerous)"
135 help
136 Say Y to enable some early debugging facilities that may be available
137 for your processor/board combination. Those facilities are hacks
138 intended to debug problems early during boot, this should not be
139 enabled in a production kernel.
140 Note that enabling this will also cause the kernel default log level
141 to be pushed to max automatically very early during boot
142
143choice
144 prompt "Early debugging console"
145 depends on PPC_EARLY_DEBUG
146 help
147 Use the selected console for early debugging. Careful, if you
148 enable debugging for the wrong type of machine your kernel
149 _will not boot_.
150
151config PPC_EARLY_DEBUG_BOOTX
152 bool "BootX or OpenFirmware"
153 depends on BOOTX_TEXT
154 help
155 Select this to enable early debugging for a machine using BootX
156 or OpenFirmware.
157
158config PPC_EARLY_DEBUG_LPAR
159 bool "LPAR HV Console"
160 depends on PPC_PSERIES
161 help
162 Select this to enable early debugging for a machine with a HVC
163 console on vterm 0.
164
165config PPC_EARLY_DEBUG_LPAR_HVSI
166 bool "LPAR HVSI Console"
167 depends on PPC_PSERIES
168 help
169 Select this to enable early debugging for a machine with a HVSI
170 console on a specified vterm.
171
172config PPC_EARLY_DEBUG_G5
173 bool "Apple G5"
174 depends on PPC_PMAC64
175 help
176 Select this to enable early debugging for Apple G5 machines.
177
178config PPC_EARLY_DEBUG_RTAS_PANEL
179 bool "RTAS Panel"
180 depends on PPC_RTAS
181 help
182 Select this to enable early debugging via the RTAS panel.
183
184config PPC_EARLY_DEBUG_RTAS_CONSOLE
185 bool "RTAS Console"
186 depends on PPC_RTAS
187 select UDBG_RTAS_CONSOLE
188 help
189 Select this to enable early debugging via the RTAS console.
190
191config PPC_EARLY_DEBUG_MAPLE
192 bool "Maple real mode"
193 depends on PPC_MAPLE
194 help
195 Select this to enable early debugging for Maple.
196
197config PPC_EARLY_DEBUG_PAS_REALMODE
198 bool "PA Semi real mode"
199 depends on PPC_PASEMI
200 help
201 Select this to enable early debugging for PA Semi.
202 Output will be on UART0.
203
204config PPC_EARLY_DEBUG_44x
205 bool "Early serial debugging for IBM/AMCC 44x CPUs"
206 depends on 44x
207 help
208 Select this to enable early debugging for IBM 44x chips via the
209 inbuilt serial port. If you enable this, ensure you set
210 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
211
212config PPC_EARLY_DEBUG_40x
213 bool "Early serial debugging for IBM/AMCC 40x CPUs"
214 depends on 40x
215 help
216 Select this to enable early debugging for IBM 40x chips via the
217 inbuilt serial port. This works on chips with a 16550 compatible
218 UART. Xilinx chips with uartlite cannot use this option.
219
220config PPC_EARLY_DEBUG_CPM
221 bool "Early serial debugging for Freescale CPM-based serial ports"
222 depends on SERIAL_CPM
223 select PIN_TLB if PPC_8xx
224 help
225 Select this to enable early debugging for Freescale chips
226 using a CPM-based serial port. This assumes that the bootwrapper
227 has run, and set up the CPM in a particular way.
228
229config PPC_EARLY_DEBUG_USBGECKO
230 bool "Early debugging through the USB Gecko adapter"
231 depends on GAMECUBE_COMMON
232 select USBGECKO_UDBG
233 help
234 Select this to enable early debugging for Nintendo GameCube/Wii
235 consoles via an external USB Gecko adapter.
236
237config PPC_EARLY_DEBUG_PS3GELIC
238 bool "Early debugging through the PS3 Ethernet port"
239 depends on PPC_PS3
240 select PS3GELIC_UDBG
241 help
242 Select this to enable early debugging for the PlayStation3 via
243 UDP broadcasts sent out through the Ethernet port.
244
245config PPC_EARLY_DEBUG_OPAL_RAW
246 bool "OPAL raw console"
247 depends on HVC_OPAL
248 help
249 Select this to enable early debugging for the PowerNV platform
250 using a "raw" console
251
252config PPC_EARLY_DEBUG_OPAL_HVSI
253 bool "OPAL hvsi console"
254 depends on HVC_OPAL
255 help
256 Select this to enable early debugging for the PowerNV platform
257 using an "hvsi" console
258
259config PPC_EARLY_DEBUG_MEMCONS
260 bool "In memory console"
261 help
262 Select this to enable early debugging using an in memory console.
263 This console provides input and output buffers stored within the
264 kernel BSS and should be safe to select on any system. A debugger
265 can then be used to read kernel output or send input to the console.
266endchoice
267
268config PPC_MEMCONS_OUTPUT_SIZE
269 int "In memory console output buffer size"
270 depends on PPC_EARLY_DEBUG_MEMCONS
271 default 4096
272 help
273 Selects the size of the output buffer (in bytes) of the in memory
274 console.
275
276config PPC_MEMCONS_INPUT_SIZE
277 int "In memory console input buffer size"
278 depends on PPC_EARLY_DEBUG_MEMCONS
279 default 128
280 help
281 Selects the size of the input buffer (in bytes) of the in memory
282 console.
283
284config PPC_EARLY_DEBUG_OPAL
285 def_bool y
286 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
287
288
289config PPC_EARLY_DEBUG_HVSI_VTERMNO
290 hex "vterm number to use with early debug HVSI"
291 depends on PPC_EARLY_DEBUG_LPAR_HVSI
292 default "0x30000000"
293 help
294 You probably want 0x30000000 for your first serial port and
295 0x30000001 for your second one
296
297config PPC_EARLY_DEBUG_OPAL_VTERMNO
298 hex "vterm number to use with OPAL early debug"
299 depends on PPC_EARLY_DEBUG_OPAL
300 default "0"
301 help
302 This correspond to which /dev/hvcN you want to use for early
303 debug.
304
305 On OPAL v2, this will be 0 for network console and 1 or 2 for
306 the machine built-in serial ports.
307
308config PPC_EARLY_DEBUG_44x_PHYSLOW
309 hex "Low 32 bits of early debug UART physical address"
310 depends on PPC_EARLY_DEBUG_44x
311 default "0x40000200"
312 help
313 You probably want 0x40000200 for ebony boards and
314 0x40000300 for taishan
315
316config PPC_EARLY_DEBUG_44x_PHYSHIGH
317 hex "EPRN of early debug UART physical address"
318 depends on PPC_EARLY_DEBUG_44x
319 default "0x1"
320
321config PPC_EARLY_DEBUG_40x_PHYSADDR
322 hex "Early debug UART physical address"
323 depends on PPC_EARLY_DEBUG_40x
324 default "0xef600300"
325
326config PPC_EARLY_DEBUG_CPM_ADDR
327 hex "CPM UART early debug transmit descriptor address"
328 depends on PPC_EARLY_DEBUG_CPM
329 default "0xfa202008" if PPC_EP88XC
330 default "0xf0001ff8" if CPM2
331 default "0xff002008" if CPM1
332 help
333 This specifies the address of the transmit descriptor
334 used for early debug output. Because it is needed before
335 platform probing is done, all platforms selected must
336 share the same address.
337
338config FAIL_IOMMU
339 bool "Fault-injection capability for IOMMU"
340 depends on FAULT_INJECTION
341 help
342 Provide fault-injection capability for IOMMU. Each device can
343 be selectively enabled via the fail_iommu property.
344
345 If you are unsure, say N.
346
347endmenu