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Commit | Line | Data |
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14cf11af PM |
1 | menu "Kernel hacking" |
2 | ||
3 | source "lib/Kconfig.debug" | |
4 | ||
ff64208d PM |
5 | config DEBUG_STACKOVERFLOW |
6 | bool "Check for stack overflows" | |
304df8f7 | 7 | depends on DEBUG_KERNEL |
ff64208d PM |
8 | help |
9 | This option will cause messages to be printed if free stack space | |
10 | drops below a certain limit. | |
11 | ||
ff64208d PM |
12 | config DEBUG_STACK_USAGE |
13 | bool "Stack utilization instrumentation" | |
304df8f7 | 14 | depends on DEBUG_KERNEL |
ff64208d PM |
15 | help |
16 | Enables the display of the minimum amount of free stack which each | |
17 | task has ever had available in the sysrq-T and sysrq-P debug output. | |
18 | ||
19 | This option will slow down process creation somewhat. | |
20 | ||
88df6e90 BH |
21 | config DEBUG_PAGEALLOC |
22 | bool "Debug page memory allocations" | |
b0cb1a19 | 23 | depends on DEBUG_KERNEL && !HIBERNATION |
88df6e90 BH |
24 | help |
25 | Unmap pages from the kernel linear mapping after free_pages(). | |
26 | This results in a large slowdown, but helps to find certain types | |
27 | of memory corruptions. | |
28 | ||
29 | ||
57852a85 MK |
30 | config HCALL_STATS |
31 | bool "Hypervisor call instrumentation" | |
32 | depends on PPC_PSERIES && DEBUG_FS | |
33 | help | |
34 | Adds code to keep track of the number of hypervisor calls made and | |
3dde6ad8 | 35 | the amount of time spent in hypervisor calls. Wall time spent in |
57852a85 MK |
36 | each call is always calculated, and if available CPU cycles spent |
37 | are also calculated. A directory named hcall_inst is added at the | |
38 | root of the debugfs filesystem. Within the hcall_inst directory | |
39 | are files that contain CPU specific call statistics. | |
40 | ||
41 | This option will add a small amount of overhead to all hypervisor | |
42 | calls. | |
43 | ||
ae0dc736 ME |
44 | config CODE_PATCHING_SELFTEST |
45 | bool "Run self-tests of the code-patching code." | |
46 | depends on DEBUG_KERNEL | |
47 | default n | |
48 | ||
362e7701 ME |
49 | config FTR_FIXUP_SELFTEST |
50 | bool "Run self-tests of the feature-fixup code." | |
51 | depends on DEBUG_KERNEL | |
52 | default n | |
53 | ||
7e302869 ME |
54 | config MSI_BITMAP_SELFTEST |
55 | bool "Run self-tests of the MSI bitmap code." | |
56 | depends on DEBUG_KERNEL | |
57 | default n | |
58 | ||
14cf11af PM |
59 | config XMON |
60 | bool "Include xmon kernel debugger" | |
17ce452f | 61 | depends on DEBUG_KERNEL |
14cf11af PM |
62 | help |
63 | Include in-kernel hooks for the xmon kernel monitor/debugger. | |
64 | Unless you are intending to debug the kernel, say N here. | |
ff64208d PM |
65 | Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise |
66 | nothing will appear on the screen (xmon writes directly to the | |
67 | framebuffer memory). | |
68 | The cmdline option 'xmon' or 'xmon=early' will drop into xmon | |
69 | very early during boot. 'xmon=on' will just enable the xmon | |
70 | debugger hooks. 'xmon=off' will disable the debugger hooks | |
71 | if CONFIG_XMON_DEFAULT is set. | |
26c8af5f OH |
72 | xmon will print a backtrace on the very first invocation. |
73 | 'xmon=nobt' will disable this autobacktrace. | |
ff64208d PM |
74 | |
75 | config XMON_DEFAULT | |
76 | bool "Enable xmon by default" | |
77 | depends on XMON | |
78 | help | |
79 | xmon is normally disabled unless booted with 'xmon=on'. | |
80 | Use 'xmon=off' to disable xmon init during runtime. | |
81 | ||
e0426047 ME |
82 | config XMON_DISASSEMBLY |
83 | bool "Include disassembly support in xmon" | |
84 | depends on XMON | |
85 | default y | |
86 | help | |
87 | Include support for disassembling in xmon. You probably want | |
88 | to say Y here, unless you're building for a memory-constrained | |
89 | system. | |
90 | ||
17ce452f JW |
91 | config DEBUGGER |
92 | bool | |
93 | depends on KGDB || XMON | |
94 | default y | |
95 | ||
ff64208d PM |
96 | config IRQSTACKS |
97 | bool "Use separate kernel stacks when processing interrupts" | |
ff64208d PM |
98 | help |
99 | If you say Y here the kernel will use separate kernel stacks | |
100 | for handling hard and soft interrupts. This can help avoid | |
101 | overflowing the process kernel stacks. | |
14cf11af | 102 | |
60b332e7 ME |
103 | config VIRQ_DEBUG |
104 | bool "Expose hardware/virtual IRQ mapping via debugfs" | |
9c4cb825 | 105 | depends on DEBUG_FS |
60b332e7 ME |
106 | help |
107 | This option will show the mapping relationship between hardware irq | |
108 | numbers and virtual irq numbers. The mapping is exposed via debugfs | |
109 | in the file powerpc/virq_mapping. | |
110 | ||
111 | If you don't know what this means you don't need it. | |
112 | ||
14cf11af PM |
113 | config BDI_SWITCH |
114 | bool "Include BDI-2000 user context switcher" | |
ff64208d | 115 | depends on DEBUG_KERNEL && PPC32 |
14cf11af PM |
116 | help |
117 | Include in-kernel support for the Abatron BDI2000 debugger. | |
118 | Unless you are intending to debug the kernel with one of these | |
119 | machines, say N here. | |
120 | ||
121 | config BOOTX_TEXT | |
122 | bool "Support for early boot text console (BootX or OpenFirmware only)" | |
247537b9 | 123 | depends on PPC_OF && PPC_MULTIPLATFORM |
14cf11af PM |
124 | help |
125 | Say Y here to see progress messages from the boot firmware in text | |
126 | mode. Requires either BootX or Open Firmware. | |
127 | ||
485a2d54 ME |
128 | config PPC_EARLY_DEBUG |
129 | bool "Early debugging (dangerous)" | |
bbf45ba5 HB |
130 | # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water |
131 | # mark, which doesn't work with current 440 KVM. | |
132 | depends on !KVM | |
7ee17466 BH |
133 | help |
134 | Say Y to enable some early debugging facilities that may be available | |
135 | for your processor/board combination. Those facilities are hacks | |
136 | intended to debug problems early during boot, this should not be | |
137 | enabled in a production kernel. | |
138 | Note that enabling this will also cause the kernel default log level | |
139 | to be pushed to max automatically very early during boot | |
485a2d54 | 140 | |
296167ae | 141 | choice |
485a2d54 ME |
142 | prompt "Early debugging console" |
143 | depends on PPC_EARLY_DEBUG | |
296167ae | 144 | help |
485a2d54 ME |
145 | Use the selected console for early debugging. Careful, if you |
146 | enable debugging for the wrong type of machine your kernel | |
147 | _will not boot_. | |
296167ae ME |
148 | |
149 | config PPC_EARLY_DEBUG_LPAR | |
150 | bool "LPAR HV Console" | |
151 | depends on PPC_PSERIES | |
152 | help | |
153 | Select this to enable early debugging for a machine with a HVC | |
154 | console on vterm 0. | |
155 | ||
156 | config PPC_EARLY_DEBUG_G5 | |
157 | bool "Apple G5" | |
158 | depends on PPC_PMAC64 | |
159 | help | |
160 | Select this to enable early debugging for Apple G5 machines. | |
161 | ||
cc46bb98 | 162 | config PPC_EARLY_DEBUG_RTAS_PANEL |
296167ae ME |
163 | bool "RTAS Panel" |
164 | depends on PPC_RTAS | |
165 | help | |
166 | Select this to enable early debugging via the RTAS panel. | |
167 | ||
cc46bb98 ME |
168 | config PPC_EARLY_DEBUG_RTAS_CONSOLE |
169 | bool "RTAS Console" | |
170 | depends on PPC_RTAS | |
171 | select UDBG_RTAS_CONSOLE | |
172 | help | |
173 | Select this to enable early debugging via the RTAS console. | |
174 | ||
296167ae ME |
175 | config PPC_EARLY_DEBUG_MAPLE |
176 | bool "Maple real mode" | |
177 | depends on PPC_MAPLE | |
178 | help | |
179 | Select this to enable early debugging for Maple. | |
180 | ||
181 | config PPC_EARLY_DEBUG_ISERIES | |
182 | bool "iSeries HV Console" | |
183 | depends on PPC_ISERIES | |
184 | help | |
185 | Select this to enable early debugging for legacy iSeries. You need | |
186 | to hit "Ctrl-x Ctrl-x" to see the messages on the console. | |
187 | ||
39c870d5 OJ |
188 | config PPC_EARLY_DEBUG_PAS_REALMODE |
189 | bool "PA Semi real mode" | |
190 | depends on PPC_PASEMI | |
191 | help | |
192 | Select this to enable early debugging for PA Semi. | |
193 | Output will be on UART0. | |
194 | ||
c347b798 IK |
195 | config PPC_EARLY_DEBUG_BEAT |
196 | bool "Beat HV Console" | |
197 | depends on PPC_CELLEB | |
198 | select PPC_UDBG_BEAT | |
199 | help | |
200 | Select this to enable early debugging for Celleb with Beat. | |
201 | ||
d9b55a03 DG |
202 | config PPC_EARLY_DEBUG_44x |
203 | bool "Early serial debugging for IBM/AMCC 44x CPUs" | |
204 | depends on 44x | |
d9b55a03 DG |
205 | help |
206 | Select this to enable early debugging for IBM 44x chips via the | |
6bbc5476 HB |
207 | inbuilt serial port. If you enable this, ensure you set |
208 | PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. | |
d9b55a03 | 209 | |
9dae8afd BH |
210 | config PPC_EARLY_DEBUG_40x |
211 | bool "Early serial debugging for IBM/AMCC 40x CPUs" | |
212 | depends on 40x | |
213 | help | |
214 | Select this to enable early debugging for IBM 40x chips via the | |
215 | inbuilt serial port. This works on chips with a 16550 compatible | |
216 | UART. Xilinx chips with uartlite cannot use this option. | |
217 | ||
c374e00e SW |
218 | config PPC_EARLY_DEBUG_CPM |
219 | bool "Early serial debugging for Freescale CPM-based serial ports" | |
220 | depends on SERIAL_CPM | |
221 | select PIN_TLB if PPC_8xx | |
222 | help | |
223 | Select this to enable early debugging for Freescale chips | |
224 | using a CPM-based serial port. This assumes that the bootwrapper | |
225 | has run, and set up the CPM in a particular way. | |
226 | ||
296167ae ME |
227 | endchoice |
228 | ||
d9b55a03 DG |
229 | config PPC_EARLY_DEBUG_44x_PHYSLOW |
230 | hex "Low 32 bits of early debug UART physical address" | |
247537b9 | 231 | depends on PPC_EARLY_DEBUG_44x |
d9b55a03 | 232 | default "0x40000200" |
6bbc5476 HB |
233 | help |
234 | You probably want 0x40000200 for ebony boards and | |
235 | 0x40000300 for taishan | |
d9b55a03 DG |
236 | |
237 | config PPC_EARLY_DEBUG_44x_PHYSHIGH | |
238 | hex "EPRN of early debug UART physical address" | |
247537b9 | 239 | depends on PPC_EARLY_DEBUG_44x |
d9b55a03 DG |
240 | default "0x1" |
241 | ||
9dae8afd BH |
242 | config PPC_EARLY_DEBUG_40x_PHYSADDR |
243 | hex "Early debug UART physical address" | |
244 | depends on PPC_EARLY_DEBUG_40x | |
245 | default "0xef600300" | |
246 | ||
c374e00e SW |
247 | config PPC_EARLY_DEBUG_CPM_ADDR |
248 | hex "CPM UART early debug transmit descriptor address" | |
249 | depends on PPC_EARLY_DEBUG_CPM | |
15f8c604 | 250 | default "0xfa202008" if PPC_EP88XC |
c2dd3529 | 251 | default "0xf0001ff8" if CPM2 |
15f8c604 | 252 | default "0xff002008" if CPM1 |
c374e00e SW |
253 | help |
254 | This specifies the address of the transmit descriptor | |
255 | used for early debug output. Because it is needed before | |
256 | platform probing is done, all platforms selected must | |
257 | share the same address. | |
258 | ||
14cf11af | 259 | endmenu |