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.
48 bool "Hypervisor call instrumentation"
49 depends on PPC_PSERIES && DEBUG_FS
51 Adds code to keep track of the number of hypervisor calls made and
52 the amount of time spent in hypervisor calls. Wall time spent in
53 each call is always calculated, and if available CPU cycles spent
54 are also calculated. A directory named hcall_inst is added at the
55 root of the debugfs filesystem. Within the hcall_inst directory
56 are files that contain CPU specific call statistics.
58 This option will add a small amount of overhead to all hypervisor
61 config PPC_EMULATED_STATS
62 bool "Emulated instructions tracking"
65 Adds code to keep track of the number of instructions that are
66 emulated by the in-kernel emulator. Counters for the various classes
67 of emulated instructions are available under
68 powerpc/emulated_instructions/ in the root of the debugfs file
69 system. Optionally (controlled by
70 powerpc/emulated_instructions/do_warn in debugfs), rate-limited
71 warnings can be printed to the console when instructions are
74 config CODE_PATCHING_SELFTEST
75 bool "Run self-tests of the code-patching code."
76 depends on DEBUG_KERNEL
79 config FTR_FIXUP_SELFTEST
80 bool "Run self-tests of the feature-fixup code."
81 depends on DEBUG_KERNEL
84 config MSI_BITMAP_SELFTEST
85 bool "Run self-tests of the MSI bitmap code."
86 depends on DEBUG_KERNEL
90 bool "Include xmon kernel debugger"
91 depends on DEBUG_KERNEL
93 Include in-kernel hooks for the xmon kernel monitor/debugger.
94 Unless you are intending to debug the kernel, say N here.
95 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
96 nothing will appear on the screen (xmon writes directly to the
98 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
99 very early during boot. 'xmon=on' will just enable the xmon
100 debugger hooks. 'xmon=off' will disable the debugger hooks
101 if CONFIG_XMON_DEFAULT is set.
102 xmon will print a backtrace on the very first invocation.
103 'xmon=nobt' will disable this autobacktrace.
106 bool "Enable xmon by default"
109 xmon is normally disabled unless booted with 'xmon=on'.
110 Use 'xmon=off' to disable xmon init during runtime.
112 config XMON_DISASSEMBLY
113 bool "Include disassembly support in xmon"
117 Include support for disassembling in xmon. You probably want
118 to say Y here, unless you're building for a memory-constrained
123 depends on KGDB || XMON
127 bool "Use separate kernel stacks when processing interrupts"
129 If you say Y here the kernel will use separate kernel stacks
130 for handling hard and soft interrupts. This can help avoid
131 overflowing the process kernel stacks.
134 bool "Expose hardware/virtual IRQ mapping via debugfs"
137 This option will show the mapping relationship between hardware irq
138 numbers and virtual irq numbers. The mapping is exposed via debugfs
139 in the file powerpc/virq_mapping.
141 If you don't know what this means you don't need it.
144 bool "Include BDI-2000 user context switcher"
145 depends on DEBUG_KERNEL && PPC32
147 Include in-kernel support for the Abatron BDI2000 debugger.
148 Unless you are intending to debug the kernel with one of these
149 machines, say N here.
152 bool "Support for early boot text console (BootX or OpenFirmware only)"
153 depends on PPC_OF && PPC_BOOK3S
155 Say Y here to see progress messages from the boot firmware in text
156 mode. Requires either BootX or Open Firmware.
158 config PPC_EARLY_DEBUG
159 bool "Early debugging (dangerous)"
160 # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
161 # mark, which doesn't work with current 440 KVM.
164 Say Y to enable some early debugging facilities that may be available
165 for your processor/board combination. Those facilities are hacks
166 intended to debug problems early during boot, this should not be
167 enabled in a production kernel.
168 Note that enabling this will also cause the kernel default log level
169 to be pushed to max automatically very early during boot
172 prompt "Early debugging console"
173 depends on PPC_EARLY_DEBUG
175 Use the selected console for early debugging. Careful, if you
176 enable debugging for the wrong type of machine your kernel
179 config PPC_EARLY_DEBUG_LPAR
180 bool "LPAR HV Console"
181 depends on PPC_PSERIES
183 Select this to enable early debugging for a machine with a HVC
186 config PPC_EARLY_DEBUG_G5
188 depends on PPC_PMAC64
190 Select this to enable early debugging for Apple G5 machines.
192 config PPC_EARLY_DEBUG_RTAS_PANEL
196 Select this to enable early debugging via the RTAS panel.
198 config PPC_EARLY_DEBUG_RTAS_CONSOLE
201 select UDBG_RTAS_CONSOLE
203 Select this to enable early debugging via the RTAS console.
205 config PPC_EARLY_DEBUG_MAPLE
206 bool "Maple real mode"
209 Select this to enable early debugging for Maple.
211 config PPC_EARLY_DEBUG_ISERIES
212 bool "iSeries HV Console"
213 depends on PPC_ISERIES
215 Select this to enable early debugging for legacy iSeries. You need
216 to hit "Ctrl-x Ctrl-x" to see the messages on the console.
218 config PPC_EARLY_DEBUG_PAS_REALMODE
219 bool "PA Semi real mode"
220 depends on PPC_PASEMI
222 Select this to enable early debugging for PA Semi.
223 Output will be on UART0.
225 config PPC_EARLY_DEBUG_BEAT
226 bool "Beat HV Console"
227 depends on PPC_CELLEB
230 Select this to enable early debugging for Celleb with Beat.
232 config PPC_EARLY_DEBUG_44x
233 bool "Early serial debugging for IBM/AMCC 44x CPUs"
236 Select this to enable early debugging for IBM 44x chips via the
237 inbuilt serial port. If you enable this, ensure you set
238 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
240 config PPC_EARLY_DEBUG_40x
241 bool "Early serial debugging for IBM/AMCC 40x CPUs"
244 Select this to enable early debugging for IBM 40x chips via the
245 inbuilt serial port. This works on chips with a 16550 compatible
246 UART. Xilinx chips with uartlite cannot use this option.
248 config PPC_EARLY_DEBUG_CPM
249 bool "Early serial debugging for Freescale CPM-based serial ports"
250 depends on SERIAL_CPM
251 select PIN_TLB if PPC_8xx
253 Select this to enable early debugging for Freescale chips
254 using a CPM-based serial port. This assumes that the bootwrapper
255 has run, and set up the CPM in a particular way.
259 config PPC_EARLY_DEBUG_44x_PHYSLOW
260 hex "Low 32 bits of early debug UART physical address"
261 depends on PPC_EARLY_DEBUG_44x
264 You probably want 0x40000200 for ebony boards and
265 0x40000300 for taishan
267 config PPC_EARLY_DEBUG_44x_PHYSHIGH
268 hex "EPRN of early debug UART physical address"
269 depends on PPC_EARLY_DEBUG_44x
272 config PPC_EARLY_DEBUG_40x_PHYSADDR
273 hex "Early debug UART physical address"
274 depends on PPC_EARLY_DEBUG_40x
277 config PPC_EARLY_DEBUG_CPM_ADDR
278 hex "CPM UART early debug transmit descriptor address"
279 depends on PPC_EARLY_DEBUG_CPM
280 default "0xfa202008" if PPC_EP88XC
281 default "0xf0001ff8" if CPM2
282 default "0xff002008" if CPM1
284 This specifies the address of the transmit descriptor
285 used for early debug output. Because it is needed before
286 platform probing is done, all platforms selected must
287 share the same address.