3 source "lib/Kconfig.debug"
5 config PPC_DISABLE_WERROR
6 bool "Don't build arch/powerpc code with -Werror"
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).
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
19 depends on !PPC_DISABLE_WERROR
22 config PRINT_STACK_DEPTH
23 int "Stack depth to print" if DEBUG_KERNEL
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.
31 config DEBUG_STACKOVERFLOW
32 bool "Check for stack overflows"
33 depends on DEBUG_KERNEL
35 This option will cause messages to be printed if free stack space
36 drops below a certain limit.
39 bool "Hypervisor call instrumentation"
40 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
42 Adds code to keep track of the number of hypervisor calls made and
43 the amount of time spent in hypervisor calls. Wall time spent in
44 each call is always calculated, and if available CPU cycles spent
45 are also calculated. A directory named hcall_inst is added at the
46 root of the debugfs filesystem. Within the hcall_inst directory
47 are files that contain CPU specific call statistics.
49 This option will add a small amount of overhead to all hypervisor
52 config PPC_EMULATED_STATS
53 bool "Emulated instructions tracking"
56 Adds code to keep track of the number of instructions that are
57 emulated by the in-kernel emulator. Counters for the various classes
58 of emulated instructions are available under
59 powerpc/emulated_instructions/ in the root of the debugfs file
60 system. Optionally (controlled by
61 powerpc/emulated_instructions/do_warn in debugfs), rate-limited
62 warnings can be printed to the console when instructions are
65 config CODE_PATCHING_SELFTEST
66 bool "Run self-tests of the code-patching code."
67 depends on DEBUG_KERNEL
70 config FTR_FIXUP_SELFTEST
71 bool "Run self-tests of the feature-fixup code."
72 depends on DEBUG_KERNEL
75 config MSI_BITMAP_SELFTEST
76 bool "Run self-tests of the MSI bitmap code."
77 depends on DEBUG_KERNEL
81 bool "Include xmon kernel debugger"
82 depends on DEBUG_KERNEL
84 Include in-kernel hooks for the xmon kernel monitor/debugger.
85 Unless you are intending to debug the kernel, say N here.
86 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
87 nothing will appear on the screen (xmon writes directly to the
89 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
90 very early during boot. 'xmon=on' will just enable the xmon
91 debugger hooks. 'xmon=off' will disable the debugger hooks
92 if CONFIG_XMON_DEFAULT is set.
93 xmon will print a backtrace on the very first invocation.
94 'xmon=nobt' will disable this autobacktrace.
97 bool "Enable xmon by default"
100 xmon is normally disabled unless booted with 'xmon=on'.
101 Use 'xmon=off' to disable xmon init during runtime.
103 config XMON_DISASSEMBLY
104 bool "Include disassembly support in xmon"
108 Include support for disassembling in xmon. You probably want
109 to say Y here, unless you're building for a memory-constrained
114 depends on KGDB || XMON
118 bool "Include BDI-2000 user context switcher"
119 depends on DEBUG_KERNEL && PPC32
121 Include in-kernel support for the Abatron BDI2000 debugger.
122 Unless you are intending to debug the kernel with one of these
123 machines, say N here.
126 bool "Support for early boot text console (BootX or OpenFirmware only)"
127 depends on PPC_OF && PPC_BOOK3S
129 Say Y here to see progress messages from the boot firmware in text
130 mode. Requires either BootX or Open Firmware.
132 config PPC_EARLY_DEBUG
133 bool "Early debugging (dangerous)"
135 Say Y to enable some early debugging facilities that may be available
136 for your processor/board combination. Those facilities are hacks
137 intended to debug problems early during boot, this should not be
138 enabled in a production kernel.
139 Note that enabling this will also cause the kernel default log level
140 to be pushed to max automatically very early during boot
143 prompt "Early debugging console"
144 depends on PPC_EARLY_DEBUG
146 Use the selected console for early debugging. Careful, if you
147 enable debugging for the wrong type of machine your kernel
150 config PPC_EARLY_DEBUG_BOOTX
151 bool "BootX or OpenFirmware"
152 depends on BOOTX_TEXT
154 Select this to enable early debugging for a machine using BootX
157 config PPC_EARLY_DEBUG_LPAR
158 bool "LPAR HV Console"
159 depends on PPC_PSERIES
161 Select this to enable early debugging for a machine with a HVC
164 config PPC_EARLY_DEBUG_LPAR_HVSI
165 bool "LPAR HVSI Console"
166 depends on PPC_PSERIES
168 Select this to enable early debugging for a machine with a HVSI
169 console on a specified vterm.
171 config PPC_EARLY_DEBUG_G5
173 depends on PPC_PMAC64
175 Select this to enable early debugging for Apple G5 machines.
177 config PPC_EARLY_DEBUG_RTAS_PANEL
181 Select this to enable early debugging via the RTAS panel.
183 config PPC_EARLY_DEBUG_RTAS_CONSOLE
186 select UDBG_RTAS_CONSOLE
188 Select this to enable early debugging via the RTAS console.
190 config PPC_EARLY_DEBUG_MAPLE
191 bool "Maple real mode"
194 Select this to enable early debugging for Maple.
196 config PPC_EARLY_DEBUG_PAS_REALMODE
197 bool "PA Semi real mode"
198 depends on PPC_PASEMI
200 Select this to enable early debugging for PA Semi.
201 Output will be on UART0.
203 config PPC_EARLY_DEBUG_BEAT
204 bool "Beat HV Console"
205 depends on PPC_CELLEB
208 Select this to enable early debugging for Celleb with Beat.
210 config PPC_EARLY_DEBUG_44x
211 bool "Early serial debugging for IBM/AMCC 44x CPUs"
212 # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
213 # mark, which doesn't work with current 440 KVM.
214 depends on 44x && !KVM
216 Select this to enable early debugging for IBM 44x chips via the
217 inbuilt serial port. If you enable this, ensure you set
218 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
220 config PPC_EARLY_DEBUG_40x
221 bool "Early serial debugging for IBM/AMCC 40x CPUs"
224 Select this to enable early debugging for IBM 40x chips via the
225 inbuilt serial port. This works on chips with a 16550 compatible
226 UART. Xilinx chips with uartlite cannot use this option.
228 config PPC_EARLY_DEBUG_CPM
229 bool "Early serial debugging for Freescale CPM-based serial ports"
230 depends on SERIAL_CPM
231 select PIN_TLB if PPC_8xx
233 Select this to enable early debugging for Freescale chips
234 using a CPM-based serial port. This assumes that the bootwrapper
235 has run, and set up the CPM in a particular way.
237 config PPC_EARLY_DEBUG_USBGECKO
238 bool "Early debugging through the USB Gecko adapter"
239 depends on GAMECUBE_COMMON
242 Select this to enable early debugging for Nintendo GameCube/Wii
243 consoles via an external USB Gecko adapter.
245 config PPC_EARLY_DEBUG_WSP
246 bool "Early debugging via WSP's internal UART"
248 select PPC_UDBG_16550
250 config PPC_EARLY_DEBUG_PS3GELIC
251 bool "Early debugging through the PS3 Ethernet port"
255 Select this to enable early debugging for the PlayStation3 via
256 UDP broadcasts sent out through the Ethernet port.
258 config PPC_EARLY_DEBUG_OPAL_RAW
259 bool "OPAL raw console"
262 Select this to enable early debugging for the PowerNV platform
263 using a "raw" console
265 config PPC_EARLY_DEBUG_OPAL_HVSI
266 bool "OPAL hvsi console"
269 Select this to enable early debugging for the PowerNV platform
270 using an "hvsi" console
272 config PPC_EARLY_DEBUG_MEMCONS
273 bool "In memory console"
275 Select this to enable early debugging using an in memory console.
276 This console provides input and output buffers stored within the
277 kernel BSS and should be safe to select on any system. A debugger
278 can then be used to read kernel output or send input to the console.
281 config PPC_MEMCONS_OUTPUT_SIZE
282 int "In memory console output buffer size"
283 depends on PPC_EARLY_DEBUG_MEMCONS
286 Selects the size of the output buffer (in bytes) of the in memory
289 config PPC_MEMCONS_INPUT_SIZE
290 int "In memory console input buffer size"
291 depends on PPC_EARLY_DEBUG_MEMCONS
294 Selects the size of the input buffer (in bytes) of the in memory
297 config PPC_EARLY_DEBUG_OPAL
299 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
302 config PPC_EARLY_DEBUG_HVSI_VTERMNO
303 hex "vterm number to use with early debug HVSI"
304 depends on PPC_EARLY_DEBUG_LPAR_HVSI
307 You probably want 0x30000000 for your first serial port and
308 0x30000001 for your second one
310 config PPC_EARLY_DEBUG_OPAL_VTERMNO
311 hex "vterm number to use with OPAL early debug"
312 depends on PPC_EARLY_DEBUG_OPAL
315 This correspond to which /dev/hvcN you want to use for early
318 On OPAL v1 (takeover) this should always be 0
319 On OPAL v2, this will be 0 for network console and 1 or 2 for
320 the machine built-in serial ports.
322 config PPC_EARLY_DEBUG_44x_PHYSLOW
323 hex "Low 32 bits of early debug UART physical address"
324 depends on PPC_EARLY_DEBUG_44x
327 You probably want 0x40000200 for ebony boards and
328 0x40000300 for taishan
330 config PPC_EARLY_DEBUG_44x_PHYSHIGH
331 hex "EPRN of early debug UART physical address"
332 depends on PPC_EARLY_DEBUG_44x
335 config PPC_EARLY_DEBUG_40x_PHYSADDR
336 hex "Early debug UART physical address"
337 depends on PPC_EARLY_DEBUG_40x
340 config PPC_EARLY_DEBUG_CPM_ADDR
341 hex "CPM UART early debug transmit descriptor address"
342 depends on PPC_EARLY_DEBUG_CPM
343 default "0xfa202008" if PPC_EP88XC
344 default "0xf0001ff8" if CPM2
345 default "0xff002008" if CPM1
347 This specifies the address of the transmit descriptor
348 used for early debug output. Because it is needed before
349 platform probing is done, all platforms selected must
350 share the same address.
354 prompt "Filter access to /dev/mem"
356 This option restricts access to /dev/mem. If this option is
357 disabled, you allow userspace access to all memory, including
358 kernel and userspace memory. Accidental memory access is likely
360 Memory access is required for experts who want to debug the kernel.
362 If you are unsure, say Y.
365 bool "Fault-injection capability for IOMMU"
366 depends on FAULT_INJECTION
368 Provide fault-injection capability for IOMMU. Each device can
369 be selectively enabled via the fail_iommu property.
371 If you are unsure, say N.