blob: 1b8a9c905cf7f429e13be1ab97f809cd5a92aa80 [file] [log] [blame]
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001menu "Kernel hacking"
2
3source "lib/Kconfig.debug"
4
Michael Ellermanba55bd72009-06-09 20:48:51 +00005config 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
Johannes Bergc4d04be2008-11-20 03:24:07 +000022config 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
Paul Mackerrasff642082005-10-10 22:15:52 +100031config DEBUG_STACKOVERFLOW
32 bool "Check for stack overflows"
Kumar Gala304df8f2007-01-30 00:45:56 -060033 depends on DEBUG_KERNEL
Paul Mackerrasff642082005-10-10 22:15:52 +100034 help
35 This option will cause messages to be printed if free stack space
36 drops below a certain limit.
37
Mike Kravetz57852a82006-09-06 16:23:12 -070038config HCALL_STATS
39 bool "Hypervisor call instrumentation"
Anton Blanchardc8cd0932009-10-26 18:50:29 +000040 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
Mike Kravetz57852a82006-09-06 16:23:12 -070041 help
42 Adds code to keep track of the number of hypervisor calls made and
David Sterba3dde6ad2007-05-09 07:12:20 +020043 the amount of time spent in hypervisor calls. Wall time spent in
Mike Kravetz57852a82006-09-06 16:23:12 -070044 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
Geert Uytterhoeven80947e72009-05-18 02:10:05 +000052config 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
Michael Ellermanae0dc732008-06-24 11:32:32 +100065config CODE_PATCHING_SELFTEST
66 bool "Run self-tests of the code-patching code."
67 depends on DEBUG_KERNEL
68 default n
69
Michael Ellerman362e7702008-06-24 11:33:03 +100070config FTR_FIXUP_SELFTEST
71 bool "Run self-tests of the feature-fixup code."
72 depends on DEBUG_KERNEL
73 default n
74
Michael Ellerman7e302862008-08-06 09:10:01 +100075config MSI_BITMAP_SELFTEST
76 bool "Run self-tests of the MSI bitmap code."
77 depends on DEBUG_KERNEL
78 default n
79
Paul Mackerras14cf11a2005-09-26 16:04:21 +100080config XMON
81 bool "Include xmon kernel debugger"
Jason Wessel17ce4522008-07-23 11:30:15 -050082 depends on DEBUG_KERNEL
Paul Mackerras14cf11a2005-09-26 16:04:21 +100083 help
84 Include in-kernel hooks for the xmon kernel monitor/debugger.
85 Unless you are intending to debug the kernel, say N here.
Paul Mackerrasff642082005-10-10 22:15:52 +100086 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.
Olaf Hering26c8af52006-09-08 16:29:21 +020093 xmon will print a backtrace on the very first invocation.
94 'xmon=nobt' will disable this autobacktrace.
Paul Mackerrasff642082005-10-10 22:15:52 +100095
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
Michael Ellermane0426042006-11-23 00:46:45 +0100103config 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
Jason Wessel17ce4522008-07-23 11:30:15 -0500112config DEBUGGER
113 bool
114 depends on KGDB || XMON
115 default y
116
Michael Ellerman60b332e2007-08-28 18:47:57 +1000117config VIRQ_DEBUG
118 bool "Expose hardware/virtual IRQ mapping via debugfs"
Kumar Gala9c4cb822008-08-02 02:44:11 +1000119 depends on DEBUG_FS
Michael Ellerman60b332e2007-08-28 18:47:57 +1000120 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
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000127config BDI_SWITCH
128 bool "Include BDI-2000 user context switcher"
Paul Mackerrasff642082005-10-10 22:15:52 +1000129 depends on DEBUG_KERNEL && PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000130 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)"
Benjamin Herrenschmidt28794d32009-03-10 17:53:27 +0000137 depends on PPC_OF && PPC_BOOK3S
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000138 help
139 Say Y here to see progress messages from the boot firmware in text
140 mode. Requires either BootX or Open Firmware.
141
Michael Ellerman485a2d52006-05-09 16:03:51 +1000142config PPC_EARLY_DEBUG
143 bool "Early debugging (dangerous)"
Benjamin Herrenschmidt7ee17462007-12-11 14:48:24 +1100144 help
145 Say Y to enable some early debugging facilities that may be available
146 for your processor/board combination. Those facilities are hacks
147 intended to debug problems early during boot, this should not be
148 enabled in a production kernel.
149 Note that enabling this will also cause the kernel default log level
150 to be pushed to max automatically very early during boot
Michael Ellerman485a2d52006-05-09 16:03:51 +1000151
Michael Ellerman296167a2006-01-11 11:54:09 +1100152choice
Michael Ellerman485a2d52006-05-09 16:03:51 +1000153 prompt "Early debugging console"
154 depends on PPC_EARLY_DEBUG
Michael Ellerman296167a2006-01-11 11:54:09 +1100155 help
Michael Ellerman485a2d52006-05-09 16:03:51 +1000156 Use the selected console for early debugging. Careful, if you
157 enable debugging for the wrong type of machine your kernel
158 _will not boot_.
Michael Ellerman296167a2006-01-11 11:54:09 +1100159
160config PPC_EARLY_DEBUG_LPAR
161 bool "LPAR HV Console"
162 depends on PPC_PSERIES
163 help
164 Select this to enable early debugging for a machine with a HVC
165 console on vterm 0.
166
Benjamin Herrenschmidt4d2bb3f2011-05-12 13:46:38 +1000167config PPC_EARLY_DEBUG_LPAR_HVSI
168 bool "LPAR HVSI Console"
169 depends on PPC_PSERIES
170 help
171 Select this to enable early debugging for a machine with a HVSI
172 console on a specified vterm.
173
Michael Ellerman296167a2006-01-11 11:54:09 +1100174config PPC_EARLY_DEBUG_G5
175 bool "Apple G5"
176 depends on PPC_PMAC64
177 help
178 Select this to enable early debugging for Apple G5 machines.
179
Michael Ellermancc46bb92006-06-23 18:20:16 +1000180config PPC_EARLY_DEBUG_RTAS_PANEL
Michael Ellerman296167a2006-01-11 11:54:09 +1100181 bool "RTAS Panel"
182 depends on PPC_RTAS
183 help
184 Select this to enable early debugging via the RTAS panel.
185
Michael Ellermancc46bb92006-06-23 18:20:16 +1000186config PPC_EARLY_DEBUG_RTAS_CONSOLE
187 bool "RTAS Console"
188 depends on PPC_RTAS
189 select UDBG_RTAS_CONSOLE
190 help
191 Select this to enable early debugging via the RTAS console.
192
Michael Ellerman296167a2006-01-11 11:54:09 +1100193config PPC_EARLY_DEBUG_MAPLE
194 bool "Maple real mode"
195 depends on PPC_MAPLE
196 help
197 Select this to enable early debugging for Maple.
198
199config PPC_EARLY_DEBUG_ISERIES
200 bool "iSeries HV Console"
201 depends on PPC_ISERIES
202 help
203 Select this to enable early debugging for legacy iSeries. You need
204 to hit "Ctrl-x Ctrl-x" to see the messages on the console.
205
Olof Johansson39c870d2007-02-04 16:36:49 -0600206config PPC_EARLY_DEBUG_PAS_REALMODE
207 bool "PA Semi real mode"
208 depends on PPC_PASEMI
209 help
210 Select this to enable early debugging for PA Semi.
211 Output will be on UART0.
212
Ishizaki Kouc347b792007-02-02 16:47:17 +0900213config PPC_EARLY_DEBUG_BEAT
214 bool "Beat HV Console"
215 depends on PPC_CELLEB
216 select PPC_UDBG_BEAT
217 help
218 Select this to enable early debugging for Celleb with Beat.
219
David Gibsond9b55a02007-05-08 12:59:31 +1000220config PPC_EARLY_DEBUG_44x
221 bool "Early serial debugging for IBM/AMCC 44x CPUs"
Benjamin Herrenschmidtb8bb9222011-09-19 17:44:48 +0000222 # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
223 # mark, which doesn't work with current 440 KVM.
224 depends on 44x && !KVM
David Gibsond9b55a02007-05-08 12:59:31 +1000225 help
226 Select this to enable early debugging for IBM 44x chips via the
Hugh Blemings6bbc5472007-12-21 15:39:28 +1100227 inbuilt serial port. If you enable this, ensure you set
228 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
David Gibsond9b55a02007-05-08 12:59:31 +1000229
Benjamin Herrenschmidt9dae8af2007-12-21 15:39:26 +1100230config PPC_EARLY_DEBUG_40x
231 bool "Early serial debugging for IBM/AMCC 40x CPUs"
232 depends on 40x
233 help
234 Select this to enable early debugging for IBM 40x chips via the
235 inbuilt serial port. This works on chips with a 16550 compatible
236 UART. Xilinx chips with uartlite cannot use this option.
237
Scott Woodc374e002007-07-16 11:43:43 -0500238config PPC_EARLY_DEBUG_CPM
239 bool "Early serial debugging for Freescale CPM-based serial ports"
240 depends on SERIAL_CPM
241 select PIN_TLB if PPC_8xx
242 help
243 Select this to enable early debugging for Freescale chips
244 using a CPM-based serial port. This assumes that the bootwrapper
245 has run, and set up the CPM in a particular way.
246
Albert Herranzd1d56f82009-12-12 06:31:51 +0000247config PPC_EARLY_DEBUG_USBGECKO
248 bool "Early debugging through the USB Gecko adapter"
249 depends on GAMECUBE_COMMON
250 select USBGECKO_UDBG
251 help
252 Select this to enable early debugging for Nintendo GameCube/Wii
253 consoles via an external USB Gecko adapter.
254
Jack Millera0496d42011-04-14 22:32:08 +0000255config PPC_EARLY_DEBUG_WSP
256 bool "Early debugging via WSP's internal UART"
257 depends on PPC_WSP
258 select PPC_UDBG_16550
259
Hector Martinc26afe92011-08-31 06:32:26 +0000260config PPC_EARLY_DEBUG_PS3GELIC
261 bool "Early debugging through the PS3 Ethernet port"
262 depends on PPC_PS3
263 select PS3GELIC_UDBG
264 help
265 Select this to enable early debugging for the PlayStation3 via
266 UDP broadcasts sent out through the Ethernet port.
267
Benjamin Herrenschmidtdaea1172011-09-19 17:44:59 +0000268config PPC_EARLY_DEBUG_OPAL_RAW
269 bool "OPAL raw console"
270 depends on HVC_OPAL
271 help
272 Select this to enable early debugging for the PowerNV platform
273 using a "raw" console
274
275config PPC_EARLY_DEBUG_OPAL_HVSI
276 bool "OPAL hvsi console"
277 depends on HVC_OPAL
278 help
279 Select this to enable early debugging for the PowerNV platform
280 using an "hvsi" console
281
Michael Ellerman296167a2006-01-11 11:54:09 +1100282endchoice
283
Benjamin Herrenschmidtdaea1172011-09-19 17:44:59 +0000284config PPC_EARLY_DEBUG_OPAL
285 def_bool y
286 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
287
288
Benjamin Herrenschmidt4d2bb3f2011-05-12 13:46:38 +1000289config PPC_EARLY_DEBUG_HVSI_VTERMNO
290 hex "vterm number to use with early debug HVSI"
291 depends on PPC_EARLY_DEBUG_LPAR_HVSI
292 default "0x30000000"
293 help
294 You probably want 0x30000000 for your first serial port and
295 0x30000001 for your second one
296
Benjamin Herrenschmidtdaea1172011-09-19 17:44:59 +0000297config PPC_EARLY_DEBUG_OPAL_VTERMNO
298 hex "vterm number to use with OPAL early debug"
299 depends on PPC_EARLY_DEBUG_OPAL
300 default "0"
301 help
302 This correspond to which /dev/hvcN you want to use for early
303 debug.
304
305 On OPAL v1 (takeover) this should always be 0
306 On OPAL v2, this will be 0 for network console and 1 or 2 for
307 the machine built-in serial ports.
308
David Gibsond9b55a02007-05-08 12:59:31 +1000309config PPC_EARLY_DEBUG_44x_PHYSLOW
310 hex "Low 32 bits of early debug UART physical address"
Adrian Bunk247537b2007-09-26 20:02:52 +0200311 depends on PPC_EARLY_DEBUG_44x
David Gibsond9b55a02007-05-08 12:59:31 +1000312 default "0x40000200"
Hugh Blemings6bbc5472007-12-21 15:39:28 +1100313 help
314 You probably want 0x40000200 for ebony boards and
315 0x40000300 for taishan
David Gibsond9b55a02007-05-08 12:59:31 +1000316
317config PPC_EARLY_DEBUG_44x_PHYSHIGH
318 hex "EPRN of early debug UART physical address"
Adrian Bunk247537b2007-09-26 20:02:52 +0200319 depends on PPC_EARLY_DEBUG_44x
David Gibsond9b55a02007-05-08 12:59:31 +1000320 default "0x1"
321
Benjamin Herrenschmidt9dae8af2007-12-21 15:39:26 +1100322config PPC_EARLY_DEBUG_40x_PHYSADDR
323 hex "Early debug UART physical address"
324 depends on PPC_EARLY_DEBUG_40x
325 default "0xef600300"
326
Scott Woodc374e002007-07-16 11:43:43 -0500327config PPC_EARLY_DEBUG_CPM_ADDR
328 hex "CPM UART early debug transmit descriptor address"
329 depends on PPC_EARLY_DEBUG_CPM
Scott Wood15f8c602007-09-28 14:06:16 -0500330 default "0xfa202008" if PPC_EP88XC
Laurent Pinchartc2dd3522008-04-10 17:01:59 +0200331 default "0xf0001ff8" if CPM2
Scott Wood15f8c602007-09-28 14:06:16 -0500332 default "0xff002008" if CPM1
Scott Woodc374e002007-07-16 11:43:43 -0500333 help
334 This specifies the address of the transmit descriptor
335 used for early debug output. Because it is needed before
336 platform probing is done, all platforms selected must
337 share the same address.
338
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000339endmenu