tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 VIRQ_DEBUG
118 bool "Expose hardware/virtual IRQ mapping via debugfs"
119 depends on DEBUG_FS
120 help
121 This option will show the mapping relationship between hardware irq
122 numbers and virtual irq numbers. The mapping is exposed via debugfs
123 in the file powerpc/virq_mapping.
124
125 If you don't know what this means you don't need it.
126
127config BDI_SWITCH
128 bool "Include BDI-2000 user context switcher"
129 depends on DEBUG_KERNEL && PPC32
130 help
131 Include in-kernel support for the Abatron BDI2000 debugger.
132 Unless you are intending to debug the kernel with one of these
133 machines, say N here.
134
135config BOOTX_TEXT
136 bool "Support for early boot text console (BootX or OpenFirmware only)"
137 depends on PPC_OF && PPC_BOOK3S
138 help
139 Say Y here to see progress messages from the boot firmware in text
140 mode. Requires either BootX or Open Firmware.
141
142config PPC_EARLY_DEBUG
143 bool "Early debugging (dangerous)"
144 # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
145 # mark, which doesn't work with current 440 KVM.
146 depends on !KVM
147 help
148 Say Y to enable some early debugging facilities that may be available
149 for your processor/board combination. Those facilities are hacks
150 intended to debug problems early during boot, this should not be
151 enabled in a production kernel.
152 Note that enabling this will also cause the kernel default log level
153 to be pushed to max automatically very early during boot
154
155choice
156 prompt "Early debugging console"
157 depends on PPC_EARLY_DEBUG
158 help
159 Use the selected console for early debugging. Careful, if you
160 enable debugging for the wrong type of machine your kernel
161 _will not boot_.
162
163config PPC_EARLY_DEBUG_LPAR
164 bool "LPAR HV Console"
165 depends on PPC_PSERIES
166 help
167 Select this to enable early debugging for a machine with a HVC
168 console on vterm 0.
169
170config PPC_EARLY_DEBUG_LPAR_HVSI
171 bool "LPAR HVSI Console"
172 depends on PPC_PSERIES
173 help
174 Select this to enable early debugging for a machine with a HVSI
175 console on a specified vterm.
176
177config PPC_EARLY_DEBUG_G5
178 bool "Apple G5"
179 depends on PPC_PMAC64
180 help
181 Select this to enable early debugging for Apple G5 machines.
182
183config PPC_EARLY_DEBUG_RTAS_PANEL
184 bool "RTAS Panel"
185 depends on PPC_RTAS
186 help
187 Select this to enable early debugging via the RTAS panel.
188
189config PPC_EARLY_DEBUG_RTAS_CONSOLE
190 bool "RTAS Console"
191 depends on PPC_RTAS
192 select UDBG_RTAS_CONSOLE
193 help
194 Select this to enable early debugging via the RTAS console.
195
196config PPC_EARLY_DEBUG_MAPLE
197 bool "Maple real mode"
198 depends on PPC_MAPLE
199 help
200 Select this to enable early debugging for Maple.
201
202config PPC_EARLY_DEBUG_ISERIES
203 bool "iSeries HV Console"
204 depends on PPC_ISERIES
205 help
206 Select this to enable early debugging for legacy iSeries. You need
207 to hit "Ctrl-x Ctrl-x" to see the messages on the console.
208
209config PPC_EARLY_DEBUG_PAS_REALMODE
210 bool "PA Semi real mode"
211 depends on PPC_PASEMI
212 help
213 Select this to enable early debugging for PA Semi.
214 Output will be on UART0.
215
216config PPC_EARLY_DEBUG_BEAT
217 bool "Beat HV Console"
218 depends on PPC_CELLEB
219 select PPC_UDBG_BEAT
220 help
221 Select this to enable early debugging for Celleb with Beat.
222
223config PPC_EARLY_DEBUG_44x
224 bool "Early serial debugging for IBM/AMCC 44x CPUs"
225 depends on 44x
226 help
227 Select this to enable early debugging for IBM 44x chips via the
228 inbuilt serial port. If you enable this, ensure you set
229 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
230
231config PPC_EARLY_DEBUG_40x
232 bool "Early serial debugging for IBM/AMCC 40x CPUs"
233 depends on 40x
234 help
235 Select this to enable early debugging for IBM 40x chips via the
236 inbuilt serial port. This works on chips with a 16550 compatible
237 UART. Xilinx chips with uartlite cannot use this option.
238
239config PPC_EARLY_DEBUG_CPM
240 bool "Early serial debugging for Freescale CPM-based serial ports"
241 depends on SERIAL_CPM
242 select PIN_TLB if PPC_8xx
243 help
244 Select this to enable early debugging for Freescale chips
245 using a CPM-based serial port. This assumes that the bootwrapper
246 has run, and set up the CPM in a particular way.
247
248config PPC_EARLY_DEBUG_USBGECKO
249 bool "Early debugging through the USB Gecko adapter"
250 depends on GAMECUBE_COMMON
251 select USBGECKO_UDBG
252 help
253 Select this to enable early debugging for Nintendo GameCube/Wii
254 consoles via an external USB Gecko adapter.
255
256config PPC_EARLY_DEBUG_WSP
257 bool "Early debugging via WSP's internal UART"
258 depends on PPC_WSP
259 select PPC_UDBG_16550
260
261endchoice
262
263config PPC_EARLY_DEBUG_HVSI_VTERMNO
264 hex "vterm number to use with early debug HVSI"
265 depends on PPC_EARLY_DEBUG_LPAR_HVSI
266 default "0x30000000"
267 help
268 You probably want 0x30000000 for your first serial port and
269 0x30000001 for your second one
270
271config PPC_EARLY_DEBUG_44x_PHYSLOW
272 hex "Low 32 bits of early debug UART physical address"
273 depends on PPC_EARLY_DEBUG_44x
274 default "0x40000200"
275 help
276 You probably want 0x40000200 for ebony boards and
277 0x40000300 for taishan
278
279config PPC_EARLY_DEBUG_44x_PHYSHIGH
280 hex "EPRN of early debug UART physical address"
281 depends on PPC_EARLY_DEBUG_44x
282 default "0x1"
283
284config PPC_EARLY_DEBUG_40x_PHYSADDR
285 hex "Early debug UART physical address"
286 depends on PPC_EARLY_DEBUG_40x
287 default "0xef600300"
288
289config PPC_EARLY_DEBUG_CPM_ADDR
290 hex "CPM UART early debug transmit descriptor address"
291 depends on PPC_EARLY_DEBUG_CPM
292 default "0xfa202008" if PPC_EP88XC
293 default "0xf0001ff8" if CPM2
294 default "0xff002008" if CPM1
295 help
296 This specifies the address of the transmit descriptor
297 used for early debug output. Because it is needed before
298 platform probing is done, all platforms selected must
299 share the same address.
300
301endmenu