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.
38 config DEBUG_STACK_USAGE
39 bool "Stack utilization instrumentation"
40 depends on DEBUG_KERNEL
42 Enables the display of the minimum amount of free stack which each
43 task has ever had available in the sysrq-T and sysrq-P debug output.
45 This option will slow down process creation somewhat.
47 config DEBUG_PER_CPU_MAPS
48 bool "Debug access to per_cpu maps"
49 depends on DEBUG_KERNEL
53 Say Y to verify that the per_cpu map being accessed has
54 been setup. Adds a fair amount of code to kernel memory
55 and decreases performance.
60 bool "Hypervisor call instrumentation"
61 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
63 Adds code to keep track of the number of hypervisor calls made and
64 the amount of time spent in hypervisor calls. Wall time spent in
65 each call is always calculated, and if available CPU cycles spent
66 are also calculated. A directory named hcall_inst is added at the
67 root of the debugfs filesystem. Within the hcall_inst directory
68 are files that contain CPU specific call statistics.
70 This option will add a small amount of overhead to all hypervisor
73 config PPC_EMULATED_STATS
74 bool "Emulated instructions tracking"
77 Adds code to keep track of the number of instructions that are
78 emulated by the in-kernel emulator. Counters for the various classes
79 of emulated instructions are available under
80 powerpc/emulated_instructions/ in the root of the debugfs file
81 system. Optionally (controlled by
82 powerpc/emulated_instructions/do_warn in debugfs), rate-limited
83 warnings can be printed to the console when instructions are
86 config CODE_PATCHING_SELFTEST
87 bool "Run self-tests of the code-patching code."
88 depends on DEBUG_KERNEL
91 config FTR_FIXUP_SELFTEST
92 bool "Run self-tests of the feature-fixup code."
93 depends on DEBUG_KERNEL
96 config MSI_BITMAP_SELFTEST
97 bool "Run self-tests of the MSI bitmap code."
98 depends on DEBUG_KERNEL
102 bool "Include xmon kernel debugger"
103 depends on DEBUG_KERNEL
105 Include in-kernel hooks for the xmon kernel monitor/debugger.
106 Unless you are intending to debug the kernel, say N here.
107 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
108 nothing will appear on the screen (xmon writes directly to the
110 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
111 very early during boot. 'xmon=on' will just enable the xmon
112 debugger hooks. 'xmon=off' will disable the debugger hooks
113 if CONFIG_XMON_DEFAULT is set.
114 xmon will print a backtrace on the very first invocation.
115 'xmon=nobt' will disable this autobacktrace.
118 bool "Enable xmon by default"
121 xmon is normally disabled unless booted with 'xmon=on'.
122 Use 'xmon=off' to disable xmon init during runtime.
124 config XMON_DISASSEMBLY
125 bool "Include disassembly support in xmon"
129 Include support for disassembling in xmon. You probably want
130 to say Y here, unless you're building for a memory-constrained
135 depends on KGDB || XMON
139 bool "Expose hardware/virtual IRQ mapping via debugfs"
142 This option will show the mapping relationship between hardware irq
143 numbers and virtual irq numbers. The mapping is exposed via debugfs
144 in the file powerpc/virq_mapping.
146 If you don't know what this means you don't need it.
149 bool "Include BDI-2000 user context switcher"
150 depends on DEBUG_KERNEL && PPC32
152 Include in-kernel support for the Abatron BDI2000 debugger.
153 Unless you are intending to debug the kernel with one of these
154 machines, say N here.
157 bool "Support for early boot text console (BootX or OpenFirmware only)"
158 depends on PPC_OF && PPC_BOOK3S
160 Say Y here to see progress messages from the boot firmware in text
161 mode. Requires either BootX or Open Firmware.
163 config PPC_EARLY_DEBUG
164 bool "Early debugging (dangerous)"
165 # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
166 # mark, which doesn't work with current 440 KVM.
169 Say Y to enable some early debugging facilities that may be available
170 for your processor/board combination. Those facilities are hacks
171 intended to debug problems early during boot, this should not be
172 enabled in a production kernel.
173 Note that enabling this will also cause the kernel default log level
174 to be pushed to max automatically very early during boot
177 prompt "Early debugging console"
178 depends on PPC_EARLY_DEBUG
180 Use the selected console for early debugging. Careful, if you
181 enable debugging for the wrong type of machine your kernel
184 config PPC_EARLY_DEBUG_LPAR
185 bool "LPAR HV Console"
186 depends on PPC_PSERIES
188 Select this to enable early debugging for a machine with a HVC
191 config PPC_EARLY_DEBUG_G5
193 depends on PPC_PMAC64
195 Select this to enable early debugging for Apple G5 machines.
197 config PPC_EARLY_DEBUG_RTAS_PANEL
201 Select this to enable early debugging via the RTAS panel.
203 config PPC_EARLY_DEBUG_RTAS_CONSOLE
206 select UDBG_RTAS_CONSOLE
208 Select this to enable early debugging via the RTAS console.
210 config PPC_EARLY_DEBUG_MAPLE
211 bool "Maple real mode"
214 Select this to enable early debugging for Maple.
216 config PPC_EARLY_DEBUG_ISERIES
217 bool "iSeries HV Console"
218 depends on PPC_ISERIES
220 Select this to enable early debugging for legacy iSeries. You need
221 to hit "Ctrl-x Ctrl-x" to see the messages on the console.
223 config PPC_EARLY_DEBUG_PAS_REALMODE
224 bool "PA Semi real mode"
225 depends on PPC_PASEMI
227 Select this to enable early debugging for PA Semi.
228 Output will be on UART0.
230 config PPC_EARLY_DEBUG_BEAT
231 bool "Beat HV Console"
232 depends on PPC_CELLEB
235 Select this to enable early debugging for Celleb with Beat.
237 config PPC_EARLY_DEBUG_44x
238 bool "Early serial debugging for IBM/AMCC 44x CPUs"
241 Select this to enable early debugging for IBM 44x chips via the
242 inbuilt serial port. If you enable this, ensure you set
243 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
245 config PPC_EARLY_DEBUG_40x
246 bool "Early serial debugging for IBM/AMCC 40x CPUs"
249 Select this to enable early debugging for IBM 40x chips via the
250 inbuilt serial port. This works on chips with a 16550 compatible
251 UART. Xilinx chips with uartlite cannot use this option.
253 config PPC_EARLY_DEBUG_CPM
254 bool "Early serial debugging for Freescale CPM-based serial ports"
255 depends on SERIAL_CPM
256 select PIN_TLB if PPC_8xx
258 Select this to enable early debugging for Freescale chips
259 using a CPM-based serial port. This assumes that the bootwrapper
260 has run, and set up the CPM in a particular way.
262 config PPC_EARLY_DEBUG_USBGECKO
263 bool "Early debugging through the USB Gecko adapter"
264 depends on GAMECUBE_COMMON
267 Select this to enable early debugging for Nintendo GameCube/Wii
268 consoles via an external USB Gecko adapter.
272 config PPC_EARLY_DEBUG_44x_PHYSLOW
273 hex "Low 32 bits of early debug UART physical address"
274 depends on PPC_EARLY_DEBUG_44x
277 You probably want 0x40000200 for ebony boards and
278 0x40000300 for taishan
280 config PPC_EARLY_DEBUG_44x_PHYSHIGH
281 hex "EPRN of early debug UART physical address"
282 depends on PPC_EARLY_DEBUG_44x
285 config PPC_EARLY_DEBUG_40x_PHYSADDR
286 hex "Early debug UART physical address"
287 depends on PPC_EARLY_DEBUG_40x
290 config PPC_EARLY_DEBUG_CPM_ADDR
291 hex "CPM UART early debug transmit descriptor address"
292 depends on PPC_EARLY_DEBUG_CPM
293 default "0xfa202008" if PPC_EP88XC
294 default "0xf0001ff8" if CPM2
295 default "0xff002008" if CPM1
297 This specifies the address of the transmit descriptor
298 used for early debug output. Because it is needed before
299 platform probing is done, all platforms selected must
300 share the same address.