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 "Use separate kernel stacks when processing interrupts"
141 If you say Y here the kernel will use separate kernel stacks
142 for handling hard and soft interrupts. This can help avoid
143 overflowing the process kernel stacks.
146 bool "Expose hardware/virtual IRQ mapping via debugfs"
149 This option will show the mapping relationship between hardware irq
150 numbers and virtual irq numbers. The mapping is exposed via debugfs
151 in the file powerpc/virq_mapping.
153 If you don't know what this means you don't need it.
156 bool "Include BDI-2000 user context switcher"
157 depends on DEBUG_KERNEL && PPC32
159 Include in-kernel support for the Abatron BDI2000 debugger.
160 Unless you are intending to debug the kernel with one of these
161 machines, say N here.
164 bool "Support for early boot text console (BootX or OpenFirmware only)"
165 depends on PPC_OF && PPC_BOOK3S
167 Say Y here to see progress messages from the boot firmware in text
168 mode. Requires either BootX or Open Firmware.
170 config PPC_EARLY_DEBUG
171 bool "Early debugging (dangerous)"
172 # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
173 # mark, which doesn't work with current 440 KVM.
176 Say Y to enable some early debugging facilities that may be available
177 for your processor/board combination. Those facilities are hacks
178 intended to debug problems early during boot, this should not be
179 enabled in a production kernel.
180 Note that enabling this will also cause the kernel default log level
181 to be pushed to max automatically very early during boot
184 prompt "Early debugging console"
185 depends on PPC_EARLY_DEBUG
187 Use the selected console for early debugging. Careful, if you
188 enable debugging for the wrong type of machine your kernel
191 config PPC_EARLY_DEBUG_LPAR
192 bool "LPAR HV Console"
193 depends on PPC_PSERIES
195 Select this to enable early debugging for a machine with a HVC
198 config PPC_EARLY_DEBUG_G5
200 depends on PPC_PMAC64
202 Select this to enable early debugging for Apple G5 machines.
204 config PPC_EARLY_DEBUG_RTAS_PANEL
208 Select this to enable early debugging via the RTAS panel.
210 config PPC_EARLY_DEBUG_RTAS_CONSOLE
213 select UDBG_RTAS_CONSOLE
215 Select this to enable early debugging via the RTAS console.
217 config PPC_EARLY_DEBUG_MAPLE
218 bool "Maple real mode"
221 Select this to enable early debugging for Maple.
223 config PPC_EARLY_DEBUG_ISERIES
224 bool "iSeries HV Console"
225 depends on PPC_ISERIES
227 Select this to enable early debugging for legacy iSeries. You need
228 to hit "Ctrl-x Ctrl-x" to see the messages on the console.
230 config PPC_EARLY_DEBUG_PAS_REALMODE
231 bool "PA Semi real mode"
232 depends on PPC_PASEMI
234 Select this to enable early debugging for PA Semi.
235 Output will be on UART0.
237 config PPC_EARLY_DEBUG_BEAT
238 bool "Beat HV Console"
239 depends on PPC_CELLEB
242 Select this to enable early debugging for Celleb with Beat.
244 config PPC_EARLY_DEBUG_44x
245 bool "Early serial debugging for IBM/AMCC 44x CPUs"
248 Select this to enable early debugging for IBM 44x chips via the
249 inbuilt serial port. If you enable this, ensure you set
250 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
252 config PPC_EARLY_DEBUG_40x
253 bool "Early serial debugging for IBM/AMCC 40x CPUs"
256 Select this to enable early debugging for IBM 40x chips via the
257 inbuilt serial port. This works on chips with a 16550 compatible
258 UART. Xilinx chips with uartlite cannot use this option.
260 config PPC_EARLY_DEBUG_CPM
261 bool "Early serial debugging for Freescale CPM-based serial ports"
262 depends on SERIAL_CPM
263 select PIN_TLB if PPC_8xx
265 Select this to enable early debugging for Freescale chips
266 using a CPM-based serial port. This assumes that the bootwrapper
267 has run, and set up the CPM in a particular way.
269 config PPC_EARLY_DEBUG_USBGECKO
270 bool "Early debugging through the USB Gecko adapter"
271 depends on GAMECUBE_COMMON
274 Select this to enable early debugging for Nintendo GameCube/Wii
275 consoles via an external USB Gecko adapter.
279 config PPC_EARLY_DEBUG_44x_PHYSLOW
280 hex "Low 32 bits of early debug UART physical address"
281 depends on PPC_EARLY_DEBUG_44x
284 You probably want 0x40000200 for ebony boards and
285 0x40000300 for taishan
287 config PPC_EARLY_DEBUG_44x_PHYSHIGH
288 hex "EPRN of early debug UART physical address"
289 depends on PPC_EARLY_DEBUG_44x
292 config PPC_EARLY_DEBUG_40x_PHYSADDR
293 hex "Early debug UART physical address"
294 depends on PPC_EARLY_DEBUG_40x
297 config PPC_EARLY_DEBUG_CPM_ADDR
298 hex "CPM UART early debug transmit descriptor address"
299 depends on PPC_EARLY_DEBUG_CPM
300 default "0xfa202008" if PPC_EP88XC
301 default "0xf0001ff8" if CPM2
302 default "0xff002008" if CPM1
304 This specifies the address of the transmit descriptor
305 used for early debug output. Because it is needed before
306 platform probing is done, all platforms selected must
307 share the same address.