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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
Mike Kravetz57852a82006-09-06 16:23:12 -070031config HCALL_STATS
32 bool "Hypervisor call instrumentation"
Anton Blanchardc8cd0932009-10-26 18:50:29 +000033 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
Mike Kravetz57852a82006-09-06 16:23:12 -070034 help
35 Adds code to keep track of the number of hypervisor calls made and
David Sterba3dde6ad2007-05-09 07:12:20 +020036 the amount of time spent in hypervisor calls. Wall time spent in
Mike Kravetz57852a82006-09-06 16:23:12 -070037 each call is always calculated, and if available CPU cycles spent
38 are also calculated. A directory named hcall_inst is added at the
39 root of the debugfs filesystem. Within the hcall_inst directory
40 are files that contain CPU specific call statistics.
41
42 This option will add a small amount of overhead to all hypervisor
43 calls.
44
Geert Uytterhoeven80947e72009-05-18 02:10:05 +000045config PPC_EMULATED_STATS
46 bool "Emulated instructions tracking"
47 depends on DEBUG_FS
48 help
49 Adds code to keep track of the number of instructions that are
50 emulated by the in-kernel emulator. Counters for the various classes
51 of emulated instructions are available under
52 powerpc/emulated_instructions/ in the root of the debugfs file
53 system. Optionally (controlled by
54 powerpc/emulated_instructions/do_warn in debugfs), rate-limited
55 warnings can be printed to the console when instructions are
56 emulated.
57
Michael Ellermanae0dc732008-06-24 11:32:32 +100058config CODE_PATCHING_SELFTEST
59 bool "Run self-tests of the code-patching code."
60 depends on DEBUG_KERNEL
61 default n
62
Michael Ellerman362e7702008-06-24 11:33:03 +100063config FTR_FIXUP_SELFTEST
64 bool "Run self-tests of the feature-fixup code."
65 depends on DEBUG_KERNEL
66 default n
67
Michael Ellerman7e302862008-08-06 09:10:01 +100068config MSI_BITMAP_SELFTEST
69 bool "Run self-tests of the MSI bitmap code."
70 depends on DEBUG_KERNEL
71 default n
72
Paul Mackerras14cf11a2005-09-26 16:04:21 +100073config XMON
74 bool "Include xmon kernel debugger"
Jason Wessel17ce4522008-07-23 11:30:15 -050075 depends on DEBUG_KERNEL
Paul Mackerras14cf11a2005-09-26 16:04:21 +100076 help
77 Include in-kernel hooks for the xmon kernel monitor/debugger.
78 Unless you are intending to debug the kernel, say N here.
Paul Mackerrasff642082005-10-10 22:15:52 +100079 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
80 nothing will appear on the screen (xmon writes directly to the
81 framebuffer memory).
82 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
83 very early during boot. 'xmon=on' will just enable the xmon
84 debugger hooks. 'xmon=off' will disable the debugger hooks
85 if CONFIG_XMON_DEFAULT is set.
Olaf Hering26c8af52006-09-08 16:29:21 +020086 xmon will print a backtrace on the very first invocation.
87 'xmon=nobt' will disable this autobacktrace.
Paul Mackerrasff642082005-10-10 22:15:52 +100088
89config XMON_DEFAULT
90 bool "Enable xmon by default"
91 depends on XMON
92 help
93 xmon is normally disabled unless booted with 'xmon=on'.
94 Use 'xmon=off' to disable xmon init during runtime.
95
Michael Ellermane0426042006-11-23 00:46:45 +010096config XMON_DISASSEMBLY
97 bool "Include disassembly support in xmon"
98 depends on XMON
99 default y
100 help
101 Include support for disassembling in xmon. You probably want
102 to say Y here, unless you're building for a memory-constrained
103 system.
104
Jason Wessel17ce4522008-07-23 11:30:15 -0500105config DEBUGGER
106 bool
107 depends on KGDB || XMON
108 default y
109
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000110config BDI_SWITCH
111 bool "Include BDI-2000 user context switcher"
Paul Mackerrasff642082005-10-10 22:15:52 +1000112 depends on DEBUG_KERNEL && PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000113 help
114 Include in-kernel support for the Abatron BDI2000 debugger.
115 Unless you are intending to debug the kernel with one of these
116 machines, say N here.
117
118config BOOTX_TEXT
119 bool "Support for early boot text console (BootX or OpenFirmware only)"
Benjamin Herrenschmidt28794d32009-03-10 17:53:27 +0000120 depends on PPC_OF && PPC_BOOK3S
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000121 help
122 Say Y here to see progress messages from the boot firmware in text
123 mode. Requires either BootX or Open Firmware.
124
Michael Ellerman485a2d52006-05-09 16:03:51 +1000125config PPC_EARLY_DEBUG
126 bool "Early debugging (dangerous)"
Benjamin Herrenschmidt7ee17462007-12-11 14:48:24 +1100127 help
128 Say Y to enable some early debugging facilities that may be available
129 for your processor/board combination. Those facilities are hacks
130 intended to debug problems early during boot, this should not be
131 enabled in a production kernel.
132 Note that enabling this will also cause the kernel default log level
133 to be pushed to max automatically very early during boot
Michael Ellerman485a2d52006-05-09 16:03:51 +1000134
Michael Ellerman296167a2006-01-11 11:54:09 +1100135choice
Michael Ellerman485a2d52006-05-09 16:03:51 +1000136 prompt "Early debugging console"
137 depends on PPC_EARLY_DEBUG
Michael Ellerman296167a2006-01-11 11:54:09 +1100138 help
Michael Ellerman485a2d52006-05-09 16:03:51 +1000139 Use the selected console for early debugging. Careful, if you
140 enable debugging for the wrong type of machine your kernel
141 _will not boot_.
Michael Ellerman296167a2006-01-11 11:54:09 +1100142
Alistair Popple071df942013-04-29 13:42:43 +1000143config PPC_EARLY_DEBUG_BOOTX
144 bool "BootX or OpenFirmware"
145 depends on BOOTX_TEXT
146 help
147 Select this to enable early debugging for a machine using BootX
148 or OpenFirmware.
149
Michael Ellerman296167a2006-01-11 11:54:09 +1100150config PPC_EARLY_DEBUG_LPAR
151 bool "LPAR HV Console"
152 depends on PPC_PSERIES
153 help
154 Select this to enable early debugging for a machine with a HVC
155 console on vterm 0.
156
Benjamin Herrenschmidt4d2bb3f2011-05-12 13:46:38 +1000157config PPC_EARLY_DEBUG_LPAR_HVSI
158 bool "LPAR HVSI Console"
159 depends on PPC_PSERIES
160 help
161 Select this to enable early debugging for a machine with a HVSI
162 console on a specified vterm.
163
Michael Ellerman296167a2006-01-11 11:54:09 +1100164config PPC_EARLY_DEBUG_G5
165 bool "Apple G5"
166 depends on PPC_PMAC64
167 help
168 Select this to enable early debugging for Apple G5 machines.
169
Michael Ellermancc46bb92006-06-23 18:20:16 +1000170config PPC_EARLY_DEBUG_RTAS_PANEL
Michael Ellerman296167a2006-01-11 11:54:09 +1100171 bool "RTAS Panel"
172 depends on PPC_RTAS
173 help
174 Select this to enable early debugging via the RTAS panel.
175
Michael Ellermancc46bb92006-06-23 18:20:16 +1000176config PPC_EARLY_DEBUG_RTAS_CONSOLE
177 bool "RTAS Console"
178 depends on PPC_RTAS
179 select UDBG_RTAS_CONSOLE
180 help
181 Select this to enable early debugging via the RTAS console.
182
Michael Ellerman296167a2006-01-11 11:54:09 +1100183config PPC_EARLY_DEBUG_MAPLE
184 bool "Maple real mode"
185 depends on PPC_MAPLE
186 help
187 Select this to enable early debugging for Maple.
188
Olof Johansson39c870d2007-02-04 16:36:49 -0600189config PPC_EARLY_DEBUG_PAS_REALMODE
190 bool "PA Semi real mode"
191 depends on PPC_PASEMI
192 help
193 Select this to enable early debugging for PA Semi.
194 Output will be on UART0.
195
Ishizaki Kouc347b792007-02-02 16:47:17 +0900196config PPC_EARLY_DEBUG_BEAT
197 bool "Beat HV Console"
198 depends on PPC_CELLEB
199 select PPC_UDBG_BEAT
200 help
201 Select this to enable early debugging for Celleb with Beat.
202
David Gibsond9b55a02007-05-08 12:59:31 +1000203config PPC_EARLY_DEBUG_44x
204 bool "Early serial debugging for IBM/AMCC 44x CPUs"
Benjamin Herrenschmidtb8bb9222011-09-19 17:44:48 +0000205 # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
206 # mark, which doesn't work with current 440 KVM.
207 depends on 44x && !KVM
David Gibsond9b55a02007-05-08 12:59:31 +1000208 help
209 Select this to enable early debugging for IBM 44x chips via the
Hugh Blemings6bbc5472007-12-21 15:39:28 +1100210 inbuilt serial port. If you enable this, ensure you set
211 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
David Gibsond9b55a02007-05-08 12:59:31 +1000212
Benjamin Herrenschmidt9dae8af2007-12-21 15:39:26 +1100213config PPC_EARLY_DEBUG_40x
214 bool "Early serial debugging for IBM/AMCC 40x CPUs"
215 depends on 40x
216 help
217 Select this to enable early debugging for IBM 40x chips via the
218 inbuilt serial port. This works on chips with a 16550 compatible
219 UART. Xilinx chips with uartlite cannot use this option.
220
Scott Woodc374e002007-07-16 11:43:43 -0500221config PPC_EARLY_DEBUG_CPM
222 bool "Early serial debugging for Freescale CPM-based serial ports"
223 depends on SERIAL_CPM
224 select PIN_TLB if PPC_8xx
225 help
226 Select this to enable early debugging for Freescale chips
227 using a CPM-based serial port. This assumes that the bootwrapper
228 has run, and set up the CPM in a particular way.
229
Albert Herranzd1d56f82009-12-12 06:31:51 +0000230config PPC_EARLY_DEBUG_USBGECKO
231 bool "Early debugging through the USB Gecko adapter"
232 depends on GAMECUBE_COMMON
233 select USBGECKO_UDBG
234 help
235 Select this to enable early debugging for Nintendo GameCube/Wii
236 consoles via an external USB Gecko adapter.
237
Hector Martinc26afe92011-08-31 06:32:26 +0000238config PPC_EARLY_DEBUG_PS3GELIC
239 bool "Early debugging through the PS3 Ethernet port"
240 depends on PPC_PS3
241 select PS3GELIC_UDBG
242 help
243 Select this to enable early debugging for the PlayStation3 via
244 UDP broadcasts sent out through the Ethernet port.
245
Benjamin Herrenschmidtdaea1172011-09-19 17:44:59 +0000246config PPC_EARLY_DEBUG_OPAL_RAW
247 bool "OPAL raw console"
248 depends on HVC_OPAL
249 help
250 Select this to enable early debugging for the PowerNV platform
251 using a "raw" console
252
253config PPC_EARLY_DEBUG_OPAL_HVSI
254 bool "OPAL hvsi console"
255 depends on HVC_OPAL
256 help
257 Select this to enable early debugging for the PowerNV platform
258 using an "hvsi" console
259
Alistair Popple30650232013-04-29 18:07:47 +0000260config PPC_EARLY_DEBUG_MEMCONS
261 bool "In memory console"
262 help
263 Select this to enable early debugging using an in memory console.
264 This console provides input and output buffers stored within the
265 kernel BSS and should be safe to select on any system. A debugger
266 can then be used to read kernel output or send input to the console.
Michael Ellerman296167a2006-01-11 11:54:09 +1100267endchoice
268
Alistair Popple30650232013-04-29 18:07:47 +0000269config PPC_MEMCONS_OUTPUT_SIZE
270 int "In memory console output buffer size"
271 depends on PPC_EARLY_DEBUG_MEMCONS
272 default 4096
273 help
274 Selects the size of the output buffer (in bytes) of the in memory
275 console.
276
277config PPC_MEMCONS_INPUT_SIZE
278 int "In memory console input buffer size"
279 depends on PPC_EARLY_DEBUG_MEMCONS
280 default 128
281 help
282 Selects the size of the input buffer (in bytes) of the in memory
283 console.
284
Benjamin Herrenschmidtdaea1172011-09-19 17:44:59 +0000285config PPC_EARLY_DEBUG_OPAL
286 def_bool y
287 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
288
289
Benjamin Herrenschmidt4d2bb3f2011-05-12 13:46:38 +1000290config PPC_EARLY_DEBUG_HVSI_VTERMNO
291 hex "vterm number to use with early debug HVSI"
292 depends on PPC_EARLY_DEBUG_LPAR_HVSI
293 default "0x30000000"
294 help
295 You probably want 0x30000000 for your first serial port and
296 0x30000001 for your second one
297
Benjamin Herrenschmidtdaea1172011-09-19 17:44:59 +0000298config PPC_EARLY_DEBUG_OPAL_VTERMNO
299 hex "vterm number to use with OPAL early debug"
300 depends on PPC_EARLY_DEBUG_OPAL
301 default "0"
302 help
303 This correspond to which /dev/hvcN you want to use for early
304 debug.
305
306 On OPAL v1 (takeover) this should always be 0
307 On OPAL v2, this will be 0 for network console and 1 or 2 for
308 the machine built-in serial ports.
309
David Gibsond9b55a02007-05-08 12:59:31 +1000310config PPC_EARLY_DEBUG_44x_PHYSLOW
311 hex "Low 32 bits of early debug UART physical address"
Adrian Bunk247537b2007-09-26 20:02:52 +0200312 depends on PPC_EARLY_DEBUG_44x
David Gibsond9b55a02007-05-08 12:59:31 +1000313 default "0x40000200"
Hugh Blemings6bbc5472007-12-21 15:39:28 +1100314 help
315 You probably want 0x40000200 for ebony boards and
316 0x40000300 for taishan
David Gibsond9b55a02007-05-08 12:59:31 +1000317
318config PPC_EARLY_DEBUG_44x_PHYSHIGH
319 hex "EPRN of early debug UART physical address"
Adrian Bunk247537b2007-09-26 20:02:52 +0200320 depends on PPC_EARLY_DEBUG_44x
David Gibsond9b55a02007-05-08 12:59:31 +1000321 default "0x1"
322
Benjamin Herrenschmidt9dae8af2007-12-21 15:39:26 +1100323config PPC_EARLY_DEBUG_40x_PHYSADDR
324 hex "Early debug UART physical address"
325 depends on PPC_EARLY_DEBUG_40x
326 default "0xef600300"
327
Scott Woodc374e002007-07-16 11:43:43 -0500328config PPC_EARLY_DEBUG_CPM_ADDR
329 hex "CPM UART early debug transmit descriptor address"
330 depends on PPC_EARLY_DEBUG_CPM
Scott Wood15f8c602007-09-28 14:06:16 -0500331 default "0xfa202008" if PPC_EP88XC
Laurent Pinchartc2dd3522008-04-10 17:01:59 +0200332 default "0xf0001ff8" if CPM2
Scott Wood15f8c602007-09-28 14:06:16 -0500333 default "0xff002008" if CPM1
Scott Woodc374e002007-07-16 11:43:43 -0500334 help
335 This specifies the address of the transmit descriptor
336 used for early debug output. Because it is needed before
337 platform probing is done, all platforms selected must
338 share the same address.
339
sukadev@linux.vnet.ibm.com1d54cf22011-08-30 09:19:17 +0000340config STRICT_DEVMEM
341 def_bool y
342 prompt "Filter access to /dev/mem"
343 help
344 This option restricts access to /dev/mem. If this option is
345 disabled, you allow userspace access to all memory, including
346 kernel and userspace memory. Accidental memory access is likely
347 to be disastrous.
348 Memory access is required for experts who want to debug the kernel.
349
350 If you are unsure, say Y.
351
Anton Blanchardd6b9a812012-06-24 18:26:17 +0000352config FAIL_IOMMU
353 bool "Fault-injection capability for IOMMU"
354 depends on FAULT_INJECTION
355 help
356 Provide fault-injection capability for IOMMU. Each device can
357 be selectively enabled via the fail_iommu property.
358
359 If you are unsure, say N.
360
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000361endmenu