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Linux/arch/powerpc/Kconfig.debug

  1 menu "Kernel hacking"
  2 
  3 source "lib/Kconfig.debug"
  4 
  5 config 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 
 17 config PPC_WERROR
 18         bool
 19         depends on !PPC_DISABLE_WERROR
 20         default y
 21 
 22 config 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 
 31 config 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 
 45 config 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 
 58 config CODE_PATCHING_SELFTEST
 59         bool "Run self-tests of the code-patching code"
 60         depends on DEBUG_KERNEL
 61         default n
 62 
 63 config JUMP_LABEL_FEATURE_CHECKS
 64         bool "Enable use of jump label for cpu/mmu_has_feature()"
 65         depends on JUMP_LABEL
 66         default y
 67         help
 68           Selecting this options enables use of jump labels for some internal
 69           feature checks. This should generate more optimal code for those
 70           checks.
 71 
 72 config JUMP_LABEL_FEATURE_CHECK_DEBUG
 73         bool "Do extra check on feature fixup calls"
 74         depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS
 75         default n
 76         help
 77           This tries to catch incorrect usage of cpu_has_feature() and
 78           mmu_has_feature() in the code.
 79 
 80           If you don't know what this means, say N.
 81 
 82 config FTR_FIXUP_SELFTEST
 83         bool "Run self-tests of the feature-fixup code"
 84         depends on DEBUG_KERNEL
 85         default n
 86 
 87 config MSI_BITMAP_SELFTEST
 88         bool "Run self-tests of the MSI bitmap code"
 89         depends on DEBUG_KERNEL
 90         default n
 91 
 92 config XMON
 93         bool "Include xmon kernel debugger"
 94         depends on DEBUG_KERNEL
 95         help
 96           Include in-kernel hooks for the xmon kernel monitor/debugger.
 97           Unless you are intending to debug the kernel, say N here.
 98           Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
 99           nothing will appear on the screen (xmon writes directly to the
100           framebuffer memory).
101           The cmdline option 'xmon' or 'xmon=early' will drop into xmon
102           very early during boot. 'xmon=on' will just enable the xmon
103           debugger hooks.  'xmon=off' will disable the debugger hooks
104           if CONFIG_XMON_DEFAULT is set.
105           xmon will print a backtrace on the very first invocation.
106           'xmon=nobt' will disable this autobacktrace.
107 
108 config XMON_DEFAULT
109         bool "Enable xmon by default"
110         depends on XMON
111         help
112           xmon is normally disabled unless booted with 'xmon=on'.
113           Use 'xmon=off' to disable xmon init during runtime.
114 
115 config XMON_DISASSEMBLY
116         bool "Include disassembly support in xmon"
117         depends on XMON
118         default y
119         help
120           Include support for disassembling in xmon. You probably want
121           to say Y here, unless you're building for a memory-constrained
122           system.
123 
124 config DEBUGGER
125         bool
126         depends on KGDB || XMON
127         default y
128 
129 config BDI_SWITCH
130         bool "Include BDI-2000 user context switcher"
131         depends on DEBUG_KERNEL && PPC32
132         help
133           Include in-kernel support for the Abatron BDI2000 debugger.
134           Unless you are intending to debug the kernel with one of these
135           machines, say N here.
136 
137 config BOOTX_TEXT
138         bool "Support for early boot text console (BootX or OpenFirmware only)"
139         depends on PPC_BOOK3S
140         help
141           Say Y here to see progress messages from the boot firmware in text
142           mode. Requires either BootX or Open Firmware.
143 
144 config PPC_EARLY_DEBUG
145         bool "Early debugging (dangerous)"
146         help
147           Say Y to enable some early debugging facilities that may be available
148           for your processor/board combination. Those facilities are hacks
149           intended to debug problems early during boot, this should not be
150           enabled in a production kernel.
151           Note that enabling this will also cause the kernel default log level
152           to be pushed to max automatically very early during boot
153 
154 choice
155         prompt "Early debugging console"
156         depends on PPC_EARLY_DEBUG
157         help
158           Use the selected console for early debugging. Careful, if you
159           enable debugging for the wrong type of machine your kernel
160           _will not boot_.
161 
162 config PPC_EARLY_DEBUG_BOOTX
163         bool "BootX or OpenFirmware"
164         depends on BOOTX_TEXT
165         help
166           Select this to enable early debugging for a machine using BootX
167           or OpenFirmware.
168 
169 config PPC_EARLY_DEBUG_LPAR
170         bool "LPAR HV Console"
171         depends on PPC_PSERIES && HVC_CONSOLE
172         help
173           Select this to enable early debugging for a machine with a HVC
174           console on vterm 0.
175 
176 config PPC_EARLY_DEBUG_LPAR_HVSI
177         bool "LPAR HVSI Console"
178         depends on PPC_PSERIES && HVC_CONSOLE
179         help
180           Select this to enable early debugging for a machine with a HVSI
181           console on a specified vterm.
182 
183 config PPC_EARLY_DEBUG_G5
184         bool "Apple G5"
185         depends on PPC_PMAC64
186         help
187           Select this to enable early debugging for Apple G5 machines.
188 
189 config PPC_EARLY_DEBUG_RTAS_PANEL
190         bool "RTAS Panel"
191         depends on PPC_RTAS
192         help
193           Select this to enable early debugging via the RTAS panel.
194 
195 config PPC_EARLY_DEBUG_RTAS_CONSOLE
196         bool "RTAS Console"
197         depends on PPC_RTAS
198         select UDBG_RTAS_CONSOLE
199         help
200           Select this to enable early debugging via the RTAS console.
201 
202 config PPC_EARLY_DEBUG_MAPLE
203         bool "Maple real mode"
204         depends on PPC_MAPLE
205         help
206           Select this to enable early debugging for Maple.
207 
208 config PPC_EARLY_DEBUG_PAS_REALMODE
209         bool "PA Semi real mode"
210         depends on PPC_PASEMI
211         help
212           Select this to enable early debugging for PA Semi.
213           Output will be on UART0.
214 
215 config PPC_EARLY_DEBUG_44x
216         bool "Early serial debugging for IBM/AMCC 44x CPUs"
217         depends on 44x
218         help
219           Select this to enable early debugging for IBM 44x chips via the
220           inbuilt serial port.  If you enable this, ensure you set
221           PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
222 
223 config PPC_EARLY_DEBUG_40x
224         bool "Early serial debugging for IBM/AMCC 40x CPUs"
225         depends on 40x
226         help
227           Select this to enable early debugging for IBM 40x chips via the
228           inbuilt serial port. This works on chips with a 16550 compatible
229           UART. Xilinx chips with uartlite cannot use this option.
230 
231 config PPC_EARLY_DEBUG_CPM
232         bool "Early serial debugging for Freescale CPM-based serial ports"
233         depends on SERIAL_CPM
234         help
235           Select this to enable early debugging for Freescale chips
236           using a CPM-based serial port.  This assumes that the bootwrapper
237           has run, and set up the CPM in a particular way.
238 
239 config PPC_EARLY_DEBUG_USBGECKO
240         bool "Early debugging through the USB Gecko adapter"
241         depends on GAMECUBE_COMMON
242         select USBGECKO_UDBG
243         help
244           Select this to enable early debugging for Nintendo GameCube/Wii
245           consoles via an external USB Gecko adapter.
246 
247 config PPC_EARLY_DEBUG_PS3GELIC
248         bool "Early debugging through the PS3 Ethernet port"
249         depends on PPC_PS3
250         select PS3GELIC_UDBG
251         help
252           Select this to enable early debugging for the PlayStation3 via
253           UDP broadcasts sent out through the Ethernet port.
254 
255 config PPC_EARLY_DEBUG_OPAL_RAW
256         bool "OPAL raw console"
257         depends on HVC_OPAL
258         help
259           Select this to enable early debugging for the PowerNV platform
260           using a "raw" console
261 
262 config PPC_EARLY_DEBUG_OPAL_HVSI
263         bool "OPAL hvsi console"
264         depends on HVC_OPAL
265         help
266           Select this to enable early debugging for the PowerNV platform
267           using an "hvsi" console
268 
269 config PPC_EARLY_DEBUG_MEMCONS
270         bool "In memory console"
271         help
272           Select this to enable early debugging using an in memory console.
273           This console provides input and output buffers stored within the
274           kernel BSS and should be safe to select on any system. A debugger
275           can then be used to read kernel output or send input to the console.
276 endchoice
277 
278 config PPC_MEMCONS_OUTPUT_SIZE
279         int "In memory console output buffer size"
280         depends on PPC_EARLY_DEBUG_MEMCONS
281         default 4096
282         help
283           Selects the size of the output buffer (in bytes) of the in memory
284           console.
285 
286 config PPC_MEMCONS_INPUT_SIZE
287         int "In memory console input buffer size"
288         depends on PPC_EARLY_DEBUG_MEMCONS
289         default 128
290         help
291           Selects the size of the input buffer (in bytes) of the in memory
292           console.
293 
294 config PPC_EARLY_DEBUG_OPAL
295         def_bool y
296         depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
297 
298 
299 config PPC_EARLY_DEBUG_HVSI_VTERMNO
300         hex "vterm number to use with early debug HVSI"
301         depends on PPC_EARLY_DEBUG_LPAR_HVSI
302         default "0x30000000"
303         help
304           You probably want 0x30000000 for your first serial port and
305           0x30000001 for your second one
306 
307 config PPC_EARLY_DEBUG_OPAL_VTERMNO
308         hex "vterm number to use with OPAL early debug"
309         depends on PPC_EARLY_DEBUG_OPAL
310         default "0"
311         help
312           This correspond to which /dev/hvcN you want to use for early
313           debug.
314 
315           On OPAL v2, this will be 0 for network console and 1 or 2 for
316           the machine built-in serial ports.
317 
318 config PPC_EARLY_DEBUG_44x_PHYSLOW
319         hex "Low 32 bits of early debug UART physical address"
320         depends on PPC_EARLY_DEBUG_44x
321         default "0x40000200"
322         help
323           You probably want 0x40000200 for ebony boards and
324           0x40000300 for taishan
325 
326 config PPC_EARLY_DEBUG_44x_PHYSHIGH
327         hex "EPRN of early debug UART physical address"
328         depends on PPC_EARLY_DEBUG_44x
329         default "0x1"
330 
331 config PPC_EARLY_DEBUG_40x_PHYSADDR
332         hex "Early debug UART physical address"
333         depends on PPC_EARLY_DEBUG_40x
334         default "0xef600300"
335 
336 config PPC_EARLY_DEBUG_CPM_ADDR
337         hex "CPM UART early debug transmit descriptor address"
338         depends on PPC_EARLY_DEBUG_CPM
339         default "0xfa202008" if PPC_EP88XC
340         default "0xf0001ff8" if CPM2
341         default "0xff002008" if CPM1
342         help
343           This specifies the address of the transmit descriptor
344           used for early debug output.  Because it is needed before
345           platform probing is done, all platforms selected must
346           share the same address.
347 
348 config FAIL_IOMMU
349         bool "Fault-injection capability for IOMMU"
350         depends on FAULT_INJECTION
351         help
352           Provide fault-injection capability for IOMMU. Each device can
353           be selectively enabled via the fail_iommu property.
354 
355           If you are unsure, say N.
356 
357 endmenu

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