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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 STRICT_MM_TYPECHECKS
23	bool "Do extra type checking on mm types"
24	default n
25	help
26	  This option turns on extra type checking for some mm related types.
27
28	  If you don't know what this means, say N.
29
30config PRINT_STACK_DEPTH
31	int "Stack depth to print" if DEBUG_KERNEL
32	default 64
33	help
34	  This option allows you to set the stack depth that the kernel
35	  prints in stack traces. This can be useful if your display is
36	  too small and stack traces cause important information to
37	  scroll off the screen.
38
39config HCALL_STATS
40	bool "Hypervisor call instrumentation"
41	depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
42	help
43	  Adds code to keep track of the number of hypervisor calls made and
44	  the amount of time spent in hypervisor calls.  Wall time spent in
45	  each call is always calculated, and if available CPU cycles spent
46	  are also calculated.  A directory named hcall_inst is added at the
47	  root of the debugfs filesystem.  Within the hcall_inst directory
48	  are files that contain CPU specific call statistics.
49
50	  This option will add a small amount of overhead to all hypervisor
51	  calls.
52
53config PPC_EMULATED_STATS
54	bool "Emulated instructions tracking"
55	depends on DEBUG_FS
56	help
57	  Adds code to keep track of the number of instructions that are
58	  emulated by the in-kernel emulator. Counters for the various classes
59	  of emulated instructions are available under
60	  powerpc/emulated_instructions/ in the root of the debugfs file
61	  system. Optionally (controlled by
62	  powerpc/emulated_instructions/do_warn in debugfs), rate-limited
63	  warnings can be printed to the console when instructions are
64	  emulated.
65
66config CODE_PATCHING_SELFTEST
67	bool "Run self-tests of the code-patching code."
68	depends on DEBUG_KERNEL
69	default n
70
71config FTR_FIXUP_SELFTEST
72	bool "Run self-tests of the feature-fixup code."
73	depends on DEBUG_KERNEL
74	default n
75
76config MSI_BITMAP_SELFTEST
77	bool "Run self-tests of the MSI bitmap code."
78	depends on DEBUG_KERNEL
79	default n
80
81config XMON
82	bool "Include xmon kernel debugger"
83	depends on DEBUG_KERNEL
84	help
85	  Include in-kernel hooks for the xmon kernel monitor/debugger.
86	  Unless you are intending to debug the kernel, say N here.
87	  Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
88	  nothing will appear on the screen (xmon writes directly to the
89	  framebuffer memory).
90	  The cmdline option 'xmon' or 'xmon=early' will drop into xmon
91	  very early during boot. 'xmon=on' will just enable the xmon
92	  debugger hooks.  'xmon=off' will disable the debugger hooks
93	  if CONFIG_XMON_DEFAULT is set.
94	  xmon will print a backtrace on the very first invocation.
95	  'xmon=nobt' will disable this autobacktrace.
96
97config XMON_DEFAULT
98	bool "Enable xmon by default"
99	depends on XMON
100	help
101	  xmon is normally disabled unless booted with 'xmon=on'.
102	  Use 'xmon=off' to disable xmon init during runtime.
103
104config XMON_DISASSEMBLY
105	bool "Include disassembly support in xmon"
106	depends on XMON
107	default y
108	help
109	  Include support for disassembling in xmon. You probably want
110	  to say Y here, unless you're building for a memory-constrained
111	  system.
112
113config DEBUGGER
114	bool
115	depends on KGDB || XMON
116	default y
117
118config BDI_SWITCH
119	bool "Include BDI-2000 user context switcher"
120	depends on DEBUG_KERNEL && PPC32
121	help
122	  Include in-kernel support for the Abatron BDI2000 debugger.
123	  Unless you are intending to debug the kernel with one of these
124	  machines, say N here.
125
126config BOOTX_TEXT
127	bool "Support for early boot text console (BootX or OpenFirmware only)"
128	depends on PPC_BOOK3S
129	help
130	  Say Y here to see progress messages from the boot firmware in text
131	  mode. Requires either BootX or Open Firmware.
132
133config PPC_EARLY_DEBUG
134	bool "Early debugging (dangerous)"
135	help
136	  Say Y to enable some early debugging facilities that may be available
137	  for your processor/board combination. Those facilities are hacks
138	  intended to debug problems early during boot, this should not be
139	  enabled in a production kernel.
140	  Note that enabling this will also cause the kernel default log level
141	  to be pushed to max automatically very early during boot
142
143choice
144	prompt "Early debugging console"
145	depends on PPC_EARLY_DEBUG
146	help
147	  Use the selected console for early debugging. Careful, if you
148	  enable debugging for the wrong type of machine your kernel
149	  _will not boot_.
150
151config PPC_EARLY_DEBUG_BOOTX
152	bool "BootX or OpenFirmware"
153	depends on BOOTX_TEXT
154	help
155	  Select this to enable early debugging for a machine using BootX
156	  or OpenFirmware.
157
158config PPC_EARLY_DEBUG_LPAR
159	bool "LPAR HV Console"
160	depends on PPC_PSERIES
161	help
162	  Select this to enable early debugging for a machine with a HVC
163	  console on vterm 0.
164
165config PPC_EARLY_DEBUG_LPAR_HVSI
166	bool "LPAR HVSI Console"
167	depends on PPC_PSERIES
168	help
169	  Select this to enable early debugging for a machine with a HVSI
170	  console on a specified vterm.
171
172config PPC_EARLY_DEBUG_G5
173	bool "Apple G5"
174	depends on PPC_PMAC64
175	help
176	  Select this to enable early debugging for Apple G5 machines.
177
178config PPC_EARLY_DEBUG_RTAS_PANEL
179	bool "RTAS Panel"
180	depends on PPC_RTAS
181	help
182	  Select this to enable early debugging via the RTAS panel.
183
184config PPC_EARLY_DEBUG_RTAS_CONSOLE
185	bool "RTAS Console"
186	depends on PPC_RTAS
187	select UDBG_RTAS_CONSOLE
188	help
189	  Select this to enable early debugging via the RTAS console.
190
191config PPC_EARLY_DEBUG_MAPLE
192	bool "Maple real mode"
193	depends on PPC_MAPLE
194	help
195	  Select this to enable early debugging for Maple.
196
197config PPC_EARLY_DEBUG_PAS_REALMODE
198	bool "PA Semi real mode"
199	depends on PPC_PASEMI
200	help
201	  Select this to enable early debugging for PA Semi.
202	  Output will be on UART0.
203
204config PPC_EARLY_DEBUG_44x
205	bool "Early serial debugging for IBM/AMCC 44x CPUs"
206	depends on 44x
207	help
208	  Select this to enable early debugging for IBM 44x chips via the
209	  inbuilt serial port.  If you enable this, ensure you set
210          PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
211
212config PPC_EARLY_DEBUG_40x
213	bool "Early serial debugging for IBM/AMCC 40x CPUs"
214	depends on 40x
215	help
216	  Select this to enable early debugging for IBM 40x chips via the
217	  inbuilt serial port. This works on chips with a 16550 compatible
218	  UART. Xilinx chips with uartlite cannot use this option.
219
220config PPC_EARLY_DEBUG_CPM
221	bool "Early serial debugging for Freescale CPM-based serial ports"
222	depends on SERIAL_CPM
223	select PIN_TLB if PPC_8xx
224	help
225	  Select this to enable early debugging for Freescale chips
226	  using a CPM-based serial port.  This assumes that the bootwrapper
227	  has run, and set up the CPM in a particular way.
228
229config PPC_EARLY_DEBUG_USBGECKO
230	bool "Early debugging through the USB Gecko adapter"
231	depends on GAMECUBE_COMMON
232	select USBGECKO_UDBG
233	help
234	  Select this to enable early debugging for Nintendo GameCube/Wii
235	  consoles via an external USB Gecko adapter.
236
237config PPC_EARLY_DEBUG_PS3GELIC
238	bool "Early debugging through the PS3 Ethernet port"
239	depends on PPC_PS3
240	select PS3GELIC_UDBG
241	help
242	  Select this to enable early debugging for the PlayStation3 via
243	  UDP broadcasts sent out through the Ethernet port.
244
245config PPC_EARLY_DEBUG_OPAL_RAW
246	bool "OPAL raw console"
247	depends on HVC_OPAL
248	help
249	  Select this to enable early debugging for the PowerNV platform
250	  using a "raw" console
251
252config PPC_EARLY_DEBUG_OPAL_HVSI
253	bool "OPAL hvsi console"
254	depends on HVC_OPAL
255	help
256	  Select this to enable early debugging for the PowerNV platform
257	  using an "hvsi" console
258
259config PPC_EARLY_DEBUG_MEMCONS
260	bool "In memory console"
261	help
262	  Select this to enable early debugging using an in memory console.
263	  This console provides input and output buffers stored within the
264	  kernel BSS and should be safe to select on any system. A debugger
265	  can then be used to read kernel output or send input to the console.
266endchoice
267
268config PPC_MEMCONS_OUTPUT_SIZE
269	int "In memory console output buffer size"
270	depends on PPC_EARLY_DEBUG_MEMCONS
271	default 4096
272	help
273	  Selects the size of the output buffer (in bytes) of the in memory
274	  console.
275
276config PPC_MEMCONS_INPUT_SIZE
277	int "In memory console input buffer size"
278	depends on PPC_EARLY_DEBUG_MEMCONS
279	default 128
280	help
281	  Selects the size of the input buffer (in bytes) of the in memory
282	  console.
283
284config PPC_EARLY_DEBUG_OPAL
285	def_bool y
286	depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
287
288
289config 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
297config 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 v2, this will be 0 for network console and 1 or 2 for
306	  the machine built-in serial ports.
307
308config PPC_EARLY_DEBUG_44x_PHYSLOW
309	hex "Low 32 bits of early debug UART physical address"
310	depends on PPC_EARLY_DEBUG_44x
311	default "0x40000200"
312	help
313	  You probably want 0x40000200 for ebony boards and
314          0x40000300 for taishan
315
316config PPC_EARLY_DEBUG_44x_PHYSHIGH
317	hex "EPRN of early debug UART physical address"
318	depends on PPC_EARLY_DEBUG_44x
319	default "0x1"
320
321config PPC_EARLY_DEBUG_40x_PHYSADDR
322	hex "Early debug UART physical address"
323	depends on PPC_EARLY_DEBUG_40x
324	default "0xef600300"
325
326config PPC_EARLY_DEBUG_CPM_ADDR
327	hex "CPM UART early debug transmit descriptor address"
328	depends on PPC_EARLY_DEBUG_CPM
329	default "0xfa202008" if PPC_EP88XC
330	default "0xf0001ff8" if CPM2
331	default "0xff002008" if CPM1
332	help
333	  This specifies the address of the transmit descriptor
334	  used for early debug output.  Because it is needed before
335	  platform probing is done, all platforms selected must
336	  share the same address.
337
338config STRICT_DEVMEM
339	def_bool y
340	prompt "Filter access to /dev/mem"
341	help
342	  This option restricts access to /dev/mem.  If this option is
343	  disabled, you allow userspace access to all memory, including
344	  kernel and userspace memory. Accidental memory access is likely
345	  to be disastrous.
346	  Memory access is required for experts who want to debug the kernel.
347
348	  If you are unsure, say Y.
349
350config FAIL_IOMMU
351	bool "Fault-injection capability for IOMMU"
352	depends on FAULT_INJECTION
353	depends on PCI || IBMVIO
354	help
355	  Provide fault-injection capability for IOMMU. Each device can
356	  be selectively enabled via the fail_iommu property.
357
358	  If you are unsure, say N.
359
360endmenu
361