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Commit | Line | Data |
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14cf11af PM |
1 | menu "Kernel hacking" |
2 | ||
3 | source "lib/Kconfig.debug" | |
4 | ||
ba55bd74 ME |
5 | config 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 | ||
17 | config PPC_WERROR | |
18 | bool | |
19 | depends on !PPC_DISABLE_WERROR | |
20 | default y | |
21 | ||
c4d04be1 JB |
22 | config 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 | ||
ff64208d PM |
31 | config DEBUG_STACKOVERFLOW |
32 | bool "Check for stack overflows" | |
304df8f7 | 33 | depends on DEBUG_KERNEL |
ff64208d PM |
34 | help |
35 | This option will cause messages to be printed if free stack space | |
36 | drops below a certain limit. | |
37 | ||
ff64208d PM |
38 | config DEBUG_STACK_USAGE |
39 | bool "Stack utilization instrumentation" | |
304df8f7 | 40 | depends on DEBUG_KERNEL |
ff64208d PM |
41 | help |
42 | Enables the display of the minimum amount of free stack which each | |
43 | task has ever had available in the sysrq-T and sysrq-P debug output. | |
44 | ||
45 | This option will slow down process creation somewhat. | |
46 | ||
57852a85 MK |
47 | config HCALL_STATS |
48 | bool "Hypervisor call instrumentation" | |
49 | depends on PPC_PSERIES && DEBUG_FS | |
50 | help | |
51 | Adds code to keep track of the number of hypervisor calls made and | |
3dde6ad8 | 52 | the amount of time spent in hypervisor calls. Wall time spent in |
57852a85 MK |
53 | each call is always calculated, and if available CPU cycles spent |
54 | are also calculated. A directory named hcall_inst is added at the | |
55 | root of the debugfs filesystem. Within the hcall_inst directory | |
56 | are files that contain CPU specific call statistics. | |
57 | ||
58 | This option will add a small amount of overhead to all hypervisor | |
59 | calls. | |
60 | ||
80947e7c GU |
61 | config PPC_EMULATED_STATS |
62 | bool "Emulated instructions tracking" | |
63 | depends on DEBUG_FS | |
64 | help | |
65 | Adds code to keep track of the number of instructions that are | |
66 | emulated by the in-kernel emulator. Counters for the various classes | |
67 | of emulated instructions are available under | |
68 | powerpc/emulated_instructions/ in the root of the debugfs file | |
69 | system. Optionally (controlled by | |
70 | powerpc/emulated_instructions/do_warn in debugfs), rate-limited | |
71 | warnings can be printed to the console when instructions are | |
72 | emulated. | |
73 | ||
ae0dc736 ME |
74 | config CODE_PATCHING_SELFTEST |
75 | bool "Run self-tests of the code-patching code." | |
76 | depends on DEBUG_KERNEL | |
77 | default n | |
78 | ||
362e7701 ME |
79 | config FTR_FIXUP_SELFTEST |
80 | bool "Run self-tests of the feature-fixup code." | |
81 | depends on DEBUG_KERNEL | |
82 | default n | |
83 | ||
7e302869 ME |
84 | config MSI_BITMAP_SELFTEST |
85 | bool "Run self-tests of the MSI bitmap code." | |
86 | depends on DEBUG_KERNEL | |
87 | default n | |
88 | ||
14cf11af PM |
89 | config XMON |
90 | bool "Include xmon kernel debugger" | |
17ce452f | 91 | depends on DEBUG_KERNEL |
14cf11af PM |
92 | help |
93 | Include in-kernel hooks for the xmon kernel monitor/debugger. | |
94 | Unless you are intending to debug the kernel, say N here. | |
ff64208d PM |
95 | Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise |
96 | nothing will appear on the screen (xmon writes directly to the | |
97 | framebuffer memory). | |
98 | The cmdline option 'xmon' or 'xmon=early' will drop into xmon | |
99 | very early during boot. 'xmon=on' will just enable the xmon | |
100 | debugger hooks. 'xmon=off' will disable the debugger hooks | |
101 | if CONFIG_XMON_DEFAULT is set. | |
26c8af5f OH |
102 | xmon will print a backtrace on the very first invocation. |
103 | 'xmon=nobt' will disable this autobacktrace. | |
ff64208d PM |
104 | |
105 | config XMON_DEFAULT | |
106 | bool "Enable xmon by default" | |
107 | depends on XMON | |
108 | help | |
109 | xmon is normally disabled unless booted with 'xmon=on'. | |
110 | Use 'xmon=off' to disable xmon init during runtime. | |
111 | ||
e0426047 ME |
112 | config XMON_DISASSEMBLY |
113 | bool "Include disassembly support in xmon" | |
114 | depends on XMON | |
115 | default y | |
116 | help | |
117 | Include support for disassembling in xmon. You probably want | |
118 | to say Y here, unless you're building for a memory-constrained | |
119 | system. | |
120 | ||
17ce452f JW |
121 | config DEBUGGER |
122 | bool | |
123 | depends on KGDB || XMON | |
124 | default y | |
125 | ||
ff64208d PM |
126 | config IRQSTACKS |
127 | bool "Use separate kernel stacks when processing interrupts" | |
ff64208d PM |
128 | help |
129 | If you say Y here the kernel will use separate kernel stacks | |
130 | for handling hard and soft interrupts. This can help avoid | |
131 | overflowing the process kernel stacks. | |
14cf11af | 132 | |
60b332e7 ME |
133 | config VIRQ_DEBUG |
134 | bool "Expose hardware/virtual IRQ mapping via debugfs" | |
9c4cb825 | 135 | depends on DEBUG_FS |
60b332e7 ME |
136 | help |
137 | This option will show the mapping relationship between hardware irq | |
138 | numbers and virtual irq numbers. The mapping is exposed via debugfs | |
139 | in the file powerpc/virq_mapping. | |
140 | ||
141 | If you don't know what this means you don't need it. | |
142 | ||
14cf11af PM |
143 | config BDI_SWITCH |
144 | bool "Include BDI-2000 user context switcher" | |
ff64208d | 145 | depends on DEBUG_KERNEL && PPC32 |
14cf11af PM |
146 | help |
147 | Include in-kernel support for the Abatron BDI2000 debugger. | |
148 | Unless you are intending to debug the kernel with one of these | |
149 | machines, say N here. | |
150 | ||
151 | config BOOTX_TEXT | |
152 | bool "Support for early boot text console (BootX or OpenFirmware only)" | |
28794d34 | 153 | depends on PPC_OF && PPC_BOOK3S |
14cf11af PM |
154 | help |
155 | Say Y here to see progress messages from the boot firmware in text | |
156 | mode. Requires either BootX or Open Firmware. | |
157 | ||
485a2d54 ME |
158 | config PPC_EARLY_DEBUG |
159 | bool "Early debugging (dangerous)" | |
bbf45ba5 HB |
160 | # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water |
161 | # mark, which doesn't work with current 440 KVM. | |
162 | depends on !KVM | |
7ee17466 BH |
163 | help |
164 | Say Y to enable some early debugging facilities that may be available | |
165 | for your processor/board combination. Those facilities are hacks | |
166 | intended to debug problems early during boot, this should not be | |
167 | enabled in a production kernel. | |
168 | Note that enabling this will also cause the kernel default log level | |
169 | to be pushed to max automatically very early during boot | |
485a2d54 | 170 | |
296167ae | 171 | choice |
485a2d54 ME |
172 | prompt "Early debugging console" |
173 | depends on PPC_EARLY_DEBUG | |
296167ae | 174 | help |
485a2d54 ME |
175 | Use the selected console for early debugging. Careful, if you |
176 | enable debugging for the wrong type of machine your kernel | |
177 | _will not boot_. | |
296167ae ME |
178 | |
179 | config PPC_EARLY_DEBUG_LPAR | |
180 | bool "LPAR HV Console" | |
181 | depends on PPC_PSERIES | |
182 | help | |
183 | Select this to enable early debugging for a machine with a HVC | |
184 | console on vterm 0. | |
185 | ||
186 | config PPC_EARLY_DEBUG_G5 | |
187 | bool "Apple G5" | |
188 | depends on PPC_PMAC64 | |
189 | help | |
190 | Select this to enable early debugging for Apple G5 machines. | |
191 | ||
cc46bb98 | 192 | config PPC_EARLY_DEBUG_RTAS_PANEL |
296167ae ME |
193 | bool "RTAS Panel" |
194 | depends on PPC_RTAS | |
195 | help | |
196 | Select this to enable early debugging via the RTAS panel. | |
197 | ||
cc46bb98 ME |
198 | config PPC_EARLY_DEBUG_RTAS_CONSOLE |
199 | bool "RTAS Console" | |
200 | depends on PPC_RTAS | |
201 | select UDBG_RTAS_CONSOLE | |
202 | help | |
203 | Select this to enable early debugging via the RTAS console. | |
204 | ||
296167ae ME |
205 | config PPC_EARLY_DEBUG_MAPLE |
206 | bool "Maple real mode" | |
207 | depends on PPC_MAPLE | |
208 | help | |
209 | Select this to enable early debugging for Maple. | |
210 | ||
211 | config PPC_EARLY_DEBUG_ISERIES | |
212 | bool "iSeries HV Console" | |
213 | depends on PPC_ISERIES | |
214 | help | |
215 | Select this to enable early debugging for legacy iSeries. You need | |
216 | to hit "Ctrl-x Ctrl-x" to see the messages on the console. | |
217 | ||
39c870d5 OJ |
218 | config PPC_EARLY_DEBUG_PAS_REALMODE |
219 | bool "PA Semi real mode" | |
220 | depends on PPC_PASEMI | |
221 | help | |
222 | Select this to enable early debugging for PA Semi. | |
223 | Output will be on UART0. | |
224 | ||
c347b798 IK |
225 | config PPC_EARLY_DEBUG_BEAT |
226 | bool "Beat HV Console" | |
227 | depends on PPC_CELLEB | |
228 | select PPC_UDBG_BEAT | |
229 | help | |
230 | Select this to enable early debugging for Celleb with Beat. | |
231 | ||
d9b55a03 DG |
232 | config PPC_EARLY_DEBUG_44x |
233 | bool "Early serial debugging for IBM/AMCC 44x CPUs" | |
234 | depends on 44x | |
d9b55a03 DG |
235 | help |
236 | Select this to enable early debugging for IBM 44x chips via the | |
6bbc5476 HB |
237 | inbuilt serial port. If you enable this, ensure you set |
238 | PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. | |
d9b55a03 | 239 | |
9dae8afd BH |
240 | config PPC_EARLY_DEBUG_40x |
241 | bool "Early serial debugging for IBM/AMCC 40x CPUs" | |
242 | depends on 40x | |
243 | help | |
244 | Select this to enable early debugging for IBM 40x chips via the | |
245 | inbuilt serial port. This works on chips with a 16550 compatible | |
246 | UART. Xilinx chips with uartlite cannot use this option. | |
247 | ||
c374e00e SW |
248 | config PPC_EARLY_DEBUG_CPM |
249 | bool "Early serial debugging for Freescale CPM-based serial ports" | |
250 | depends on SERIAL_CPM | |
251 | select PIN_TLB if PPC_8xx | |
252 | help | |
253 | Select this to enable early debugging for Freescale chips | |
254 | using a CPM-based serial port. This assumes that the bootwrapper | |
255 | has run, and set up the CPM in a particular way. | |
256 | ||
296167ae ME |
257 | endchoice |
258 | ||
d9b55a03 DG |
259 | config PPC_EARLY_DEBUG_44x_PHYSLOW |
260 | hex "Low 32 bits of early debug UART physical address" | |
247537b9 | 261 | depends on PPC_EARLY_DEBUG_44x |
d9b55a03 | 262 | default "0x40000200" |
6bbc5476 HB |
263 | help |
264 | You probably want 0x40000200 for ebony boards and | |
265 | 0x40000300 for taishan | |
d9b55a03 DG |
266 | |
267 | config PPC_EARLY_DEBUG_44x_PHYSHIGH | |
268 | hex "EPRN of early debug UART physical address" | |
247537b9 | 269 | depends on PPC_EARLY_DEBUG_44x |
d9b55a03 DG |
270 | default "0x1" |
271 | ||
9dae8afd BH |
272 | config PPC_EARLY_DEBUG_40x_PHYSADDR |
273 | hex "Early debug UART physical address" | |
274 | depends on PPC_EARLY_DEBUG_40x | |
275 | default "0xef600300" | |
276 | ||
c374e00e SW |
277 | config PPC_EARLY_DEBUG_CPM_ADDR |
278 | hex "CPM UART early debug transmit descriptor address" | |
279 | depends on PPC_EARLY_DEBUG_CPM | |
15f8c604 | 280 | default "0xfa202008" if PPC_EP88XC |
c2dd3529 | 281 | default "0xf0001ff8" if CPM2 |
15f8c604 | 282 | default "0xff002008" if CPM1 |
c374e00e SW |
283 | help |
284 | This specifies the address of the transmit descriptor | |
285 | used for early debug output. Because it is needed before | |
286 | platform probing is done, all platforms selected must | |
287 | share the same address. | |
288 | ||
14cf11af | 289 | endmenu |