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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 FTR_FIXUP_SELFTEST
 64         bool "Run self-tests of the feature-fixup code."
 65         depends on DEBUG_KERNEL
 66         default n
 67 
 68 config MSI_BITMAP_SELFTEST
 69         bool "Run self-tests of the MSI bitmap code."
 70         depends on DEBUG_KERNEL
 71         default n
 72 
 73 config 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 
 89 config 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 
 96 config 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 
105 config DEBUGGER
106         bool
107         depends on KGDB || XMON
108         default y
109 
110 config 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 
118 config 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 
125 config 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 
135 choice
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 
143 config 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 
150 config 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 
157 config 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 
164 config 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 
170 config 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 
176 config 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 
183 config 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 
189 config 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 
196 config 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 
203 config PPC_EARLY_DEBUG_44x
204         bool "Early serial debugging for IBM/AMCC 44x CPUs"
205         # 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
208         help
209           Select this to enable early debugging for IBM 44x chips via the
210           inbuilt serial port.  If you enable this, ensure you set
211           PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
212 
213 config 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 
221 config 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 
230 config 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 
238 config 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 
246 config 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 
253 config 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 
260 config 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.
267 endchoice
268 
269 config 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 
277 config 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 
285 config PPC_EARLY_DEBUG_OPAL
286         def_bool y
287         depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
288 
289 
290 config 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 
298 config 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 v2, this will be 0 for network console and 1 or 2 for
307           the machine built-in serial ports.
308 
309 config PPC_EARLY_DEBUG_44x_PHYSLOW
310         hex "Low 32 bits of early debug UART physical address"
311         depends on PPC_EARLY_DEBUG_44x
312         default "0x40000200"
313         help
314           You probably want 0x40000200 for ebony boards and
315           0x40000300 for taishan
316 
317 config PPC_EARLY_DEBUG_44x_PHYSHIGH
318         hex "EPRN of early debug UART physical address"
319         depends on PPC_EARLY_DEBUG_44x
320         default "0x1"
321 
322 config PPC_EARLY_DEBUG_40x_PHYSADDR
323         hex "Early debug UART physical address"
324         depends on PPC_EARLY_DEBUG_40x
325         default "0xef600300"
326 
327 config PPC_EARLY_DEBUG_CPM_ADDR
328         hex "CPM UART early debug transmit descriptor address"
329         depends on PPC_EARLY_DEBUG_CPM
330         default "0xfa202008" if PPC_EP88XC
331         default "0xf0001ff8" if CPM2
332         default "0xff002008" if CPM1
333         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 
339 config STRICT_DEVMEM
340         def_bool y
341         prompt "Filter access to /dev/mem"
342         help
343           This option restricts access to /dev/mem.  If this option is
344           disabled, you allow userspace access to all memory, including
345           kernel and userspace memory. Accidental memory access is likely
346           to be disastrous.
347           Memory access is required for experts who want to debug the kernel.
348 
349           If you are unsure, say Y.
350 
351 config FAIL_IOMMU
352         bool "Fault-injection capability for IOMMU"
353         depends on FAULT_INJECTION
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 
360 endmenu

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