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 | ||
ff64208d PM |
44 | config DEBUGGER |
45 | bool "Enable debugger hooks" | |
46 | depends on DEBUG_KERNEL | |
47 | help | |
48 | Include in-kernel hooks for kernel debuggers. Unless you are | |
49 | intending to debug the kernel, say N here. | |
50 | ||
14cf11af PM |
51 | config KGDB |
52 | bool "Include kgdb kernel debugger" | |
ff64208d | 53 | depends on DEBUGGER && (BROKEN || PPC_GEN550 || 4xx) |
14cf11af PM |
54 | select DEBUG_INFO |
55 | help | |
56 | Include in-kernel hooks for kgdb, the Linux kernel source level | |
57 | debugger. See <http://kgdb.sourceforge.net/> for more information. | |
58 | Unless you are intending to debug the kernel, say N here. | |
59 | ||
60 | choice | |
61 | prompt "Serial Port" | |
62 | depends on KGDB | |
63 | default KGDB_TTYS1 | |
64 | ||
65 | config KGDB_TTYS0 | |
66 | bool "ttyS0" | |
67 | ||
68 | config KGDB_TTYS1 | |
69 | bool "ttyS1" | |
70 | ||
71 | config KGDB_TTYS2 | |
72 | bool "ttyS2" | |
73 | ||
74 | config KGDB_TTYS3 | |
75 | bool "ttyS3" | |
76 | ||
77 | endchoice | |
78 | ||
79 | config KGDB_CONSOLE | |
80 | bool "Enable serial console thru kgdb port" | |
81 | depends on KGDB && 8xx || CPM2 | |
82 | help | |
83 | If you enable this, all serial console messages will be sent | |
84 | over the gdb stub. | |
85 | If unsure, say N. | |
86 | ||
87 | config XMON | |
88 | bool "Include xmon kernel debugger" | |
bbb68177 | 89 | depends on DEBUGGER |
14cf11af PM |
90 | help |
91 | Include in-kernel hooks for the xmon kernel monitor/debugger. | |
92 | Unless you are intending to debug the kernel, say N here. | |
ff64208d PM |
93 | Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise |
94 | nothing will appear on the screen (xmon writes directly to the | |
95 | framebuffer memory). | |
96 | The cmdline option 'xmon' or 'xmon=early' will drop into xmon | |
97 | very early during boot. 'xmon=on' will just enable the xmon | |
98 | debugger hooks. 'xmon=off' will disable the debugger hooks | |
99 | if CONFIG_XMON_DEFAULT is set. | |
26c8af5f OH |
100 | xmon will print a backtrace on the very first invocation. |
101 | 'xmon=nobt' will disable this autobacktrace. | |
ff64208d PM |
102 | |
103 | config XMON_DEFAULT | |
104 | bool "Enable xmon by default" | |
105 | depends on XMON | |
106 | help | |
107 | xmon is normally disabled unless booted with 'xmon=on'. | |
108 | Use 'xmon=off' to disable xmon init during runtime. | |
109 | ||
e0426047 ME |
110 | config XMON_DISASSEMBLY |
111 | bool "Include disassembly support in xmon" | |
112 | depends on XMON | |
113 | default y | |
114 | help | |
115 | Include support for disassembling in xmon. You probably want | |
116 | to say Y here, unless you're building for a memory-constrained | |
117 | system. | |
118 | ||
ff64208d PM |
119 | config IRQSTACKS |
120 | bool "Use separate kernel stacks when processing interrupts" | |
121 | depends on PPC64 | |
122 | help | |
123 | If you say Y here the kernel will use separate kernel stacks | |
124 | for handling hard and soft interrupts. This can help avoid | |
125 | overflowing the process kernel stacks. | |
14cf11af | 126 | |
60b332e7 ME |
127 | config VIRQ_DEBUG |
128 | bool "Expose hardware/virtual IRQ mapping via debugfs" | |
129 | depends on DEBUG_FS && PPC_MERGE | |
130 | help | |
131 | This option will show the mapping relationship between hardware irq | |
132 | numbers and virtual irq numbers. The mapping is exposed via debugfs | |
133 | in the file powerpc/virq_mapping. | |
134 | ||
135 | If you don't know what this means you don't need it. | |
136 | ||
14cf11af PM |
137 | config BDI_SWITCH |
138 | bool "Include BDI-2000 user context switcher" | |
ff64208d | 139 | depends on DEBUG_KERNEL && PPC32 |
14cf11af PM |
140 | help |
141 | Include in-kernel support for the Abatron BDI2000 debugger. | |
142 | Unless you are intending to debug the kernel with one of these | |
143 | machines, say N here. | |
144 | ||
145 | config BOOTX_TEXT | |
146 | bool "Support for early boot text console (BootX or OpenFirmware only)" | |
247537b9 | 147 | depends on PPC_OF && PPC_MULTIPLATFORM |
14cf11af PM |
148 | help |
149 | Say Y here to see progress messages from the boot firmware in text | |
150 | mode. Requires either BootX or Open Firmware. | |
151 | ||
485a2d54 ME |
152 | config PPC_EARLY_DEBUG |
153 | bool "Early debugging (dangerous)" | |
bbf45ba5 HB |
154 | # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water |
155 | # mark, which doesn't work with current 440 KVM. | |
156 | depends on !KVM | |
7ee17466 BH |
157 | help |
158 | Say Y to enable some early debugging facilities that may be available | |
159 | for your processor/board combination. Those facilities are hacks | |
160 | intended to debug problems early during boot, this should not be | |
161 | enabled in a production kernel. | |
162 | Note that enabling this will also cause the kernel default log level | |
163 | to be pushed to max automatically very early during boot | |
485a2d54 | 164 | |
296167ae | 165 | choice |
485a2d54 ME |
166 | prompt "Early debugging console" |
167 | depends on PPC_EARLY_DEBUG | |
296167ae | 168 | help |
485a2d54 ME |
169 | Use the selected console for early debugging. Careful, if you |
170 | enable debugging for the wrong type of machine your kernel | |
171 | _will not boot_. | |
296167ae ME |
172 | |
173 | config PPC_EARLY_DEBUG_LPAR | |
174 | bool "LPAR HV Console" | |
175 | depends on PPC_PSERIES | |
176 | help | |
177 | Select this to enable early debugging for a machine with a HVC | |
178 | console on vterm 0. | |
179 | ||
180 | config PPC_EARLY_DEBUG_G5 | |
181 | bool "Apple G5" | |
182 | depends on PPC_PMAC64 | |
183 | help | |
184 | Select this to enable early debugging for Apple G5 machines. | |
185 | ||
cc46bb98 | 186 | config PPC_EARLY_DEBUG_RTAS_PANEL |
296167ae ME |
187 | bool "RTAS Panel" |
188 | depends on PPC_RTAS | |
189 | help | |
190 | Select this to enable early debugging via the RTAS panel. | |
191 | ||
cc46bb98 ME |
192 | config PPC_EARLY_DEBUG_RTAS_CONSOLE |
193 | bool "RTAS Console" | |
194 | depends on PPC_RTAS | |
195 | select UDBG_RTAS_CONSOLE | |
196 | help | |
197 | Select this to enable early debugging via the RTAS console. | |
198 | ||
296167ae ME |
199 | config PPC_EARLY_DEBUG_MAPLE |
200 | bool "Maple real mode" | |
201 | depends on PPC_MAPLE | |
202 | help | |
203 | Select this to enable early debugging for Maple. | |
204 | ||
205 | config PPC_EARLY_DEBUG_ISERIES | |
206 | bool "iSeries HV Console" | |
207 | depends on PPC_ISERIES | |
208 | help | |
209 | Select this to enable early debugging for legacy iSeries. You need | |
210 | to hit "Ctrl-x Ctrl-x" to see the messages on the console. | |
211 | ||
39c870d5 OJ |
212 | config 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 | ||
c347b798 IK |
219 | config PPC_EARLY_DEBUG_BEAT |
220 | bool "Beat HV Console" | |
221 | depends on PPC_CELLEB | |
222 | select PPC_UDBG_BEAT | |
223 | help | |
224 | Select this to enable early debugging for Celleb with Beat. | |
225 | ||
d9b55a03 DG |
226 | config PPC_EARLY_DEBUG_44x |
227 | bool "Early serial debugging for IBM/AMCC 44x CPUs" | |
228 | depends on 44x | |
d9b55a03 DG |
229 | help |
230 | Select this to enable early debugging for IBM 44x chips via the | |
6bbc5476 HB |
231 | inbuilt serial port. If you enable this, ensure you set |
232 | PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. | |
d9b55a03 | 233 | |
9dae8afd BH |
234 | config PPC_EARLY_DEBUG_40x |
235 | bool "Early serial debugging for IBM/AMCC 40x CPUs" | |
236 | depends on 40x | |
237 | help | |
238 | Select this to enable early debugging for IBM 40x chips via the | |
239 | inbuilt serial port. This works on chips with a 16550 compatible | |
240 | UART. Xilinx chips with uartlite cannot use this option. | |
241 | ||
c374e00e SW |
242 | config PPC_EARLY_DEBUG_CPM |
243 | bool "Early serial debugging for Freescale CPM-based serial ports" | |
244 | depends on SERIAL_CPM | |
245 | select PIN_TLB if PPC_8xx | |
246 | help | |
247 | Select this to enable early debugging for Freescale chips | |
248 | using a CPM-based serial port. This assumes that the bootwrapper | |
249 | has run, and set up the CPM in a particular way. | |
250 | ||
296167ae ME |
251 | endchoice |
252 | ||
d9b55a03 DG |
253 | config PPC_EARLY_DEBUG_44x_PHYSLOW |
254 | hex "Low 32 bits of early debug UART physical address" | |
247537b9 | 255 | depends on PPC_EARLY_DEBUG_44x |
d9b55a03 | 256 | default "0x40000200" |
6bbc5476 HB |
257 | help |
258 | You probably want 0x40000200 for ebony boards and | |
259 | 0x40000300 for taishan | |
d9b55a03 DG |
260 | |
261 | config PPC_EARLY_DEBUG_44x_PHYSHIGH | |
262 | hex "EPRN of early debug UART physical address" | |
247537b9 | 263 | depends on PPC_EARLY_DEBUG_44x |
d9b55a03 DG |
264 | default "0x1" |
265 | ||
9dae8afd BH |
266 | config PPC_EARLY_DEBUG_40x_PHYSADDR |
267 | hex "Early debug UART physical address" | |
268 | depends on PPC_EARLY_DEBUG_40x | |
269 | default "0xef600300" | |
270 | ||
c374e00e SW |
271 | config PPC_EARLY_DEBUG_CPM_ADDR |
272 | hex "CPM UART early debug transmit descriptor address" | |
273 | depends on PPC_EARLY_DEBUG_CPM | |
15f8c604 | 274 | default "0xfa202008" if PPC_EP88XC |
c2dd3529 | 275 | default "0xf0001ff8" if CPM2 |
15f8c604 | 276 | default "0xff002008" if CPM1 |
c374e00e SW |
277 | help |
278 | This specifies the address of the transmit descriptor | |
279 | used for early debug output. Because it is needed before | |
280 | platform probing is done, all platforms selected must | |
281 | share the same address. | |
282 | ||
14cf11af | 283 | endmenu |