Commit | Line | Data |
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14cf11af PM |
1 | menu "Kernel hacking" |
2 | ||
3 | source "lib/Kconfig.debug" | |
4 | ||
c4d04be1 JB |
5 | config PRINT_STACK_DEPTH |
6 | int "Stack depth to print" if DEBUG_KERNEL | |
7 | default 64 | |
8 | help | |
9 | This option allows you to set the stack depth that the kernel | |
10 | prints in stack traces. This can be useful if your display is | |
11 | too small and stack traces cause important information to | |
12 | scroll off the screen. | |
13 | ||
ff64208d PM |
14 | config DEBUG_STACKOVERFLOW |
15 | bool "Check for stack overflows" | |
304df8f7 | 16 | depends on DEBUG_KERNEL |
ff64208d PM |
17 | help |
18 | This option will cause messages to be printed if free stack space | |
19 | drops below a certain limit. | |
20 | ||
ff64208d PM |
21 | config DEBUG_STACK_USAGE |
22 | bool "Stack utilization instrumentation" | |
304df8f7 | 23 | depends on DEBUG_KERNEL |
ff64208d PM |
24 | help |
25 | Enables the display of the minimum amount of free stack which each | |
26 | task has ever had available in the sysrq-T and sysrq-P debug output. | |
27 | ||
28 | This option will slow down process creation somewhat. | |
29 | ||
88df6e90 BH |
30 | config DEBUG_PAGEALLOC |
31 | bool "Debug page memory allocations" | |
b0cb1a19 | 32 | depends on DEBUG_KERNEL && !HIBERNATION |
88df6e90 BH |
33 | help |
34 | Unmap pages from the kernel linear mapping after free_pages(). | |
35 | This results in a large slowdown, but helps to find certain types | |
36 | of memory corruptions. | |
37 | ||
38 | ||
57852a85 MK |
39 | config HCALL_STATS |
40 | bool "Hypervisor call instrumentation" | |
41 | depends on PPC_PSERIES && DEBUG_FS | |
42 | help | |
43 | Adds code to keep track of the number of hypervisor calls made and | |
3dde6ad8 | 44 | the amount of time spent in hypervisor calls. Wall time spent in |
57852a85 MK |
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 | ||
ae0dc736 ME |
53 | config CODE_PATCHING_SELFTEST |
54 | bool "Run self-tests of the code-patching code." | |
55 | depends on DEBUG_KERNEL | |
56 | default n | |
57 | ||
362e7701 ME |
58 | config FTR_FIXUP_SELFTEST |
59 | bool "Run self-tests of the feature-fixup code." | |
60 | depends on DEBUG_KERNEL | |
61 | default n | |
62 | ||
7e302869 ME |
63 | config MSI_BITMAP_SELFTEST |
64 | bool "Run self-tests of the MSI bitmap code." | |
65 | depends on DEBUG_KERNEL | |
66 | default n | |
67 | ||
14cf11af PM |
68 | config XMON |
69 | bool "Include xmon kernel debugger" | |
17ce452f | 70 | depends on DEBUG_KERNEL |
14cf11af PM |
71 | help |
72 | Include in-kernel hooks for the xmon kernel monitor/debugger. | |
73 | Unless you are intending to debug the kernel, say N here. | |
ff64208d PM |
74 | Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise |
75 | nothing will appear on the screen (xmon writes directly to the | |
76 | framebuffer memory). | |
77 | The cmdline option 'xmon' or 'xmon=early' will drop into xmon | |
78 | very early during boot. 'xmon=on' will just enable the xmon | |
79 | debugger hooks. 'xmon=off' will disable the debugger hooks | |
80 | if CONFIG_XMON_DEFAULT is set. | |
26c8af5f OH |
81 | xmon will print a backtrace on the very first invocation. |
82 | 'xmon=nobt' will disable this autobacktrace. | |
ff64208d PM |
83 | |
84 | config XMON_DEFAULT | |
85 | bool "Enable xmon by default" | |
86 | depends on XMON | |
87 | help | |
88 | xmon is normally disabled unless booted with 'xmon=on'. | |
89 | Use 'xmon=off' to disable xmon init during runtime. | |
90 | ||
e0426047 ME |
91 | config XMON_DISASSEMBLY |
92 | bool "Include disassembly support in xmon" | |
93 | depends on XMON | |
94 | default y | |
95 | help | |
96 | Include support for disassembling in xmon. You probably want | |
97 | to say Y here, unless you're building for a memory-constrained | |
98 | system. | |
99 | ||
17ce452f JW |
100 | config DEBUGGER |
101 | bool | |
102 | depends on KGDB || XMON | |
103 | default y | |
104 | ||
ff64208d PM |
105 | config IRQSTACKS |
106 | bool "Use separate kernel stacks when processing interrupts" | |
ff64208d PM |
107 | help |
108 | If you say Y here the kernel will use separate kernel stacks | |
109 | for handling hard and soft interrupts. This can help avoid | |
110 | overflowing the process kernel stacks. | |
14cf11af | 111 | |
60b332e7 ME |
112 | config VIRQ_DEBUG |
113 | bool "Expose hardware/virtual IRQ mapping via debugfs" | |
9c4cb825 | 114 | depends on DEBUG_FS |
60b332e7 ME |
115 | help |
116 | This option will show the mapping relationship between hardware irq | |
117 | numbers and virtual irq numbers. The mapping is exposed via debugfs | |
118 | in the file powerpc/virq_mapping. | |
119 | ||
120 | If you don't know what this means you don't need it. | |
121 | ||
14cf11af PM |
122 | config BDI_SWITCH |
123 | bool "Include BDI-2000 user context switcher" | |
ff64208d | 124 | depends on DEBUG_KERNEL && PPC32 |
14cf11af PM |
125 | help |
126 | Include in-kernel support for the Abatron BDI2000 debugger. | |
127 | Unless you are intending to debug the kernel with one of these | |
128 | machines, say N here. | |
129 | ||
130 | config BOOTX_TEXT | |
131 | bool "Support for early boot text console (BootX or OpenFirmware only)" | |
247537b9 | 132 | depends on PPC_OF && PPC_MULTIPLATFORM |
14cf11af PM |
133 | help |
134 | Say Y here to see progress messages from the boot firmware in text | |
135 | mode. Requires either BootX or Open Firmware. | |
136 | ||
485a2d54 ME |
137 | config PPC_EARLY_DEBUG |
138 | bool "Early debugging (dangerous)" | |
bbf45ba5 HB |
139 | # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water |
140 | # mark, which doesn't work with current 440 KVM. | |
141 | depends on !KVM | |
7ee17466 BH |
142 | help |
143 | Say Y to enable some early debugging facilities that may be available | |
144 | for your processor/board combination. Those facilities are hacks | |
145 | intended to debug problems early during boot, this should not be | |
146 | enabled in a production kernel. | |
147 | Note that enabling this will also cause the kernel default log level | |
148 | to be pushed to max automatically very early during boot | |
485a2d54 | 149 | |
296167ae | 150 | choice |
485a2d54 ME |
151 | prompt "Early debugging console" |
152 | depends on PPC_EARLY_DEBUG | |
296167ae | 153 | help |
485a2d54 ME |
154 | Use the selected console for early debugging. Careful, if you |
155 | enable debugging for the wrong type of machine your kernel | |
156 | _will not boot_. | |
296167ae ME |
157 | |
158 | config 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 | ||
165 | config PPC_EARLY_DEBUG_G5 | |
166 | bool "Apple G5" | |
167 | depends on PPC_PMAC64 | |
168 | help | |
169 | Select this to enable early debugging for Apple G5 machines. | |
170 | ||
cc46bb98 | 171 | config PPC_EARLY_DEBUG_RTAS_PANEL |
296167ae ME |
172 | bool "RTAS Panel" |
173 | depends on PPC_RTAS | |
174 | help | |
175 | Select this to enable early debugging via the RTAS panel. | |
176 | ||
cc46bb98 ME |
177 | config PPC_EARLY_DEBUG_RTAS_CONSOLE |
178 | bool "RTAS Console" | |
179 | depends on PPC_RTAS | |
180 | select UDBG_RTAS_CONSOLE | |
181 | help | |
182 | Select this to enable early debugging via the RTAS console. | |
183 | ||
296167ae ME |
184 | config PPC_EARLY_DEBUG_MAPLE |
185 | bool "Maple real mode" | |
186 | depends on PPC_MAPLE | |
187 | help | |
188 | Select this to enable early debugging for Maple. | |
189 | ||
190 | config PPC_EARLY_DEBUG_ISERIES | |
191 | bool "iSeries HV Console" | |
192 | depends on PPC_ISERIES | |
193 | help | |
194 | Select this to enable early debugging for legacy iSeries. You need | |
195 | to hit "Ctrl-x Ctrl-x" to see the messages on the console. | |
196 | ||
39c870d5 OJ |
197 | config 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 | ||
c347b798 IK |
204 | config PPC_EARLY_DEBUG_BEAT |
205 | bool "Beat HV Console" | |
206 | depends on PPC_CELLEB | |
207 | select PPC_UDBG_BEAT | |
208 | help | |
209 | Select this to enable early debugging for Celleb with Beat. | |
210 | ||
d9b55a03 DG |
211 | config PPC_EARLY_DEBUG_44x |
212 | bool "Early serial debugging for IBM/AMCC 44x CPUs" | |
213 | depends on 44x | |
d9b55a03 DG |
214 | help |
215 | Select this to enable early debugging for IBM 44x chips via the | |
6bbc5476 HB |
216 | inbuilt serial port. If you enable this, ensure you set |
217 | PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. | |
d9b55a03 | 218 | |
9dae8afd BH |
219 | config PPC_EARLY_DEBUG_40x |
220 | bool "Early serial debugging for IBM/AMCC 40x CPUs" | |
221 | depends on 40x | |
222 | help | |
223 | Select this to enable early debugging for IBM 40x chips via the | |
224 | inbuilt serial port. This works on chips with a 16550 compatible | |
225 | UART. Xilinx chips with uartlite cannot use this option. | |
226 | ||
c374e00e SW |
227 | config PPC_EARLY_DEBUG_CPM |
228 | bool "Early serial debugging for Freescale CPM-based serial ports" | |
229 | depends on SERIAL_CPM | |
230 | select PIN_TLB if PPC_8xx | |
231 | help | |
232 | Select this to enable early debugging for Freescale chips | |
233 | using a CPM-based serial port. This assumes that the bootwrapper | |
234 | has run, and set up the CPM in a particular way. | |
235 | ||
296167ae ME |
236 | endchoice |
237 | ||
d9b55a03 DG |
238 | config PPC_EARLY_DEBUG_44x_PHYSLOW |
239 | hex "Low 32 bits of early debug UART physical address" | |
247537b9 | 240 | depends on PPC_EARLY_DEBUG_44x |
d9b55a03 | 241 | default "0x40000200" |
6bbc5476 HB |
242 | help |
243 | You probably want 0x40000200 for ebony boards and | |
244 | 0x40000300 for taishan | |
d9b55a03 DG |
245 | |
246 | config PPC_EARLY_DEBUG_44x_PHYSHIGH | |
247 | hex "EPRN of early debug UART physical address" | |
247537b9 | 248 | depends on PPC_EARLY_DEBUG_44x |
d9b55a03 DG |
249 | default "0x1" |
250 | ||
9dae8afd BH |
251 | config PPC_EARLY_DEBUG_40x_PHYSADDR |
252 | hex "Early debug UART physical address" | |
253 | depends on PPC_EARLY_DEBUG_40x | |
254 | default "0xef600300" | |
255 | ||
c374e00e SW |
256 | config PPC_EARLY_DEBUG_CPM_ADDR |
257 | hex "CPM UART early debug transmit descriptor address" | |
258 | depends on PPC_EARLY_DEBUG_CPM | |
15f8c604 | 259 | default "0xfa202008" if PPC_EP88XC |
c2dd3529 | 260 | default "0xf0001ff8" if CPM2 |
15f8c604 | 261 | default "0xff002008" if CPM1 |
c374e00e SW |
262 | help |
263 | This specifies the address of the transmit descriptor | |
264 | used for early debug output. Because it is needed before | |
265 | platform probing is done, all platforms selected must | |
266 | share the same address. | |
267 | ||
14cf11af | 268 | endmenu |