xref: /openbmc/linux/arch/powerpc/Kconfig.debug (revision 588b48ca) 
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 HCALL_STATS
32	bool "Hypervisor call instrumentation"
33	depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
34	help
35	  Adds code to keep track of the number of hypervisor calls made and
36	  the amount of time spent in hypervisor calls.  Wall time spent in
37	  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
45config 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
58config CODE_PATCHING_SELFTEST
59	bool "Run self-tests of the code-patching code."
60	depends on DEBUG_KERNEL
61	default n
62
63config FTR_FIXUP_SELFTEST
64	bool "Run self-tests of the feature-fixup code."
65	depends on DEBUG_KERNEL
66	default n
67
68config MSI_BITMAP_SELFTEST
69	bool "Run self-tests of the MSI bitmap code."
70	depends on DEBUG_KERNEL
71	default n
72
73config XMON
74	bool "Include xmon kernel debugger"
75	depends on DEBUG_KERNEL
76	help
77	  Include in-kernel hooks for the xmon kernel monitor/debugger.
78	  Unless you are intending to debug the kernel, say N here.
79	  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.
86	  xmon will print a backtrace on the very first invocation.
87	  'xmon=nobt' will disable this autobacktrace.
88
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
96config 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
105config DEBUGGER
106	bool
107	depends on KGDB || XMON
108	default y
109
110config BDI_SWITCH
111	bool "Include BDI-2000 user context switcher"
112	depends on DEBUG_KERNEL && PPC32
113	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)"
120	depends on PPC_OF && PPC_BOOK3S
121	help
122	  Say Y here to see progress messages from the boot firmware in text
123	  mode. Requires either BootX or Open Firmware.
124
125config PPC_EARLY_DEBUG
126	bool "Early debugging (dangerous)"
127	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
134
135choice
136	prompt "Early debugging console"
137	depends on PPC_EARLY_DEBUG
138	help
139	  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_.
142
143config 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
150config 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
157config 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
164config 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
170config PPC_EARLY_DEBUG_RTAS_PANEL
171	bool "RTAS Panel"
172	depends on PPC_RTAS
173	help
174	  Select this to enable early debugging via the RTAS panel.
175
176config 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
183config 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
189config 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
196config 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
203config PPC_EARLY_DEBUG_44x
204	bool "Early serial debugging for IBM/AMCC 44x CPUs"
205	depends on 44x
206	help
207	  Select this to enable early debugging for IBM 44x chips via the
208	  inbuilt serial port.  If you enable this, ensure you set
209          PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
210
211config PPC_EARLY_DEBUG_40x
212	bool "Early serial debugging for IBM/AMCC 40x CPUs"
213	depends on 40x
214	help
215	  Select this to enable early debugging for IBM 40x chips via the
216	  inbuilt serial port. This works on chips with a 16550 compatible
217	  UART. Xilinx chips with uartlite cannot use this option.
218
219config PPC_EARLY_DEBUG_CPM
220	bool "Early serial debugging for Freescale CPM-based serial ports"
221	depends on SERIAL_CPM
222	select PIN_TLB if PPC_8xx
223	help
224	  Select this to enable early debugging for Freescale chips
225	  using a CPM-based serial port.  This assumes that the bootwrapper
226	  has run, and set up the CPM in a particular way.
227
228config PPC_EARLY_DEBUG_USBGECKO
229	bool "Early debugging through the USB Gecko adapter"
230	depends on GAMECUBE_COMMON
231	select USBGECKO_UDBG
232	help
233	  Select this to enable early debugging for Nintendo GameCube/Wii
234	  consoles via an external USB Gecko adapter.
235
236config PPC_EARLY_DEBUG_PS3GELIC
237	bool "Early debugging through the PS3 Ethernet port"
238	depends on PPC_PS3
239	select PS3GELIC_UDBG
240	help
241	  Select this to enable early debugging for the PlayStation3 via
242	  UDP broadcasts sent out through the Ethernet port.
243
244config PPC_EARLY_DEBUG_OPAL_RAW
245	bool "OPAL raw console"
246	depends on HVC_OPAL
247	help
248	  Select this to enable early debugging for the PowerNV platform
249	  using a "raw" console
250
251config PPC_EARLY_DEBUG_OPAL_HVSI
252	bool "OPAL hvsi console"
253	depends on HVC_OPAL
254	help
255	  Select this to enable early debugging for the PowerNV platform
256	  using an "hvsi" console
257
258config PPC_EARLY_DEBUG_MEMCONS
259	bool "In memory console"
260	help
261	  Select this to enable early debugging using an in memory console.
262	  This console provides input and output buffers stored within the
263	  kernel BSS and should be safe to select on any system. A debugger
264	  can then be used to read kernel output or send input to the console.
265endchoice
266
267config PPC_MEMCONS_OUTPUT_SIZE
268	int "In memory console output buffer size"
269	depends on PPC_EARLY_DEBUG_MEMCONS
270	default 4096
271	help
272	  Selects the size of the output buffer (in bytes) of the in memory
273	  console.
274
275config PPC_MEMCONS_INPUT_SIZE
276	int "In memory console input buffer size"
277	depends on PPC_EARLY_DEBUG_MEMCONS
278	default 128
279	help
280	  Selects the size of the input buffer (in bytes) of the in memory
281	  console.
282
283config PPC_EARLY_DEBUG_OPAL
284	def_bool y
285	depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
286
287
288config PPC_EARLY_DEBUG_HVSI_VTERMNO
289	hex "vterm number to use with early debug HVSI"
290	depends on PPC_EARLY_DEBUG_LPAR_HVSI
291	default "0x30000000"
292	help
293	  You probably want 0x30000000 for your first serial port and
294	  0x30000001 for your second one
295
296config PPC_EARLY_DEBUG_OPAL_VTERMNO
297	hex "vterm number to use with OPAL early debug"
298	depends on PPC_EARLY_DEBUG_OPAL
299	default "0"
300	help
301	  This correspond to which /dev/hvcN you want to use for early
302	  debug.
303
304	  On OPAL v2, this will be 0 for network console and 1 or 2 for
305	  the machine built-in serial ports.
306
307config PPC_EARLY_DEBUG_44x_PHYSLOW
308	hex "Low 32 bits of early debug UART physical address"
309	depends on PPC_EARLY_DEBUG_44x
310	default "0x40000200"
311	help
312	  You probably want 0x40000200 for ebony boards and
313          0x40000300 for taishan
314
315config PPC_EARLY_DEBUG_44x_PHYSHIGH
316	hex "EPRN of early debug UART physical address"
317	depends on PPC_EARLY_DEBUG_44x
318	default "0x1"
319
320config PPC_EARLY_DEBUG_40x_PHYSADDR
321	hex "Early debug UART physical address"
322	depends on PPC_EARLY_DEBUG_40x
323	default "0xef600300"
324
325config PPC_EARLY_DEBUG_CPM_ADDR
326	hex "CPM UART early debug transmit descriptor address"
327	depends on PPC_EARLY_DEBUG_CPM
328	default "0xfa202008" if PPC_EP88XC
329	default "0xf0001ff8" if CPM2
330	default "0xff002008" if CPM1
331	help
332	  This specifies the address of the transmit descriptor
333	  used for early debug output.  Because it is needed before
334	  platform probing is done, all platforms selected must
335	  share the same address.
336
337config STRICT_DEVMEM
338	def_bool y
339	prompt "Filter access to /dev/mem"
340	help
341	  This option restricts access to /dev/mem.  If this option is
342	  disabled, you allow userspace access to all memory, including
343	  kernel and userspace memory. Accidental memory access is likely
344	  to be disastrous.
345	  Memory access is required for experts who want to debug the kernel.
346
347	  If you are unsure, say Y.
348
349config FAIL_IOMMU
350	bool "Fault-injection capability for IOMMU"
351	depends on FAULT_INJECTION
352	help
353	  Provide fault-injection capability for IOMMU. Each device can
354	  be selectively enabled via the fail_iommu property.
355
356	  If you are unsure, say N.
357
358endmenu
359