3 source "lib/Kconfig.debug"
5 config DEBUG_STACKOVERFLOW
6 bool "Check for stack overflows"
7 depends on DEBUG_KERNEL
9 This option will cause messages to be printed if free stack space
10 drops below a certain limit.
12 config DEBUG_STACK_USAGE
13 bool "Stack utilization instrumentation"
14 depends on DEBUG_KERNEL
16 Enables the display of the minimum amount of free stack which each
17 task has ever had available in the sysrq-T and sysrq-P debug output.
19 This option will slow down process creation somewhat.
21 config DEBUG_PAGEALLOC
22 bool "Debug page memory allocations"
23 depends on DEBUG_KERNEL && !HIBERNATION
25 Unmap pages from the kernel linear mapping after free_pages().
26 This results in a large slowdown, but helps to find certain types
27 of memory corruptions.
31 bool "Hypervisor call instrumentation"
32 depends on PPC_PSERIES && DEBUG_FS
34 Adds code to keep track of the number of hypervisor calls made and
35 the amount of time spent in hypervisor calls. Wall time spent in
36 each call is always calculated, and if available CPU cycles spent
37 are also calculated. A directory named hcall_inst is added at the
38 root of the debugfs filesystem. Within the hcall_inst directory
39 are files that contain CPU specific call statistics.
41 This option will add a small amount of overhead to all hypervisor
45 bool "Enable debugger hooks"
46 depends on DEBUG_KERNEL
48 Include in-kernel hooks for kernel debuggers. Unless you are
49 intending to debug the kernel, say N here.
52 bool "Include kgdb kernel debugger"
53 depends on DEBUGGER && (BROKEN || PPC_GEN550 || 4xx)
56 Include in-kernel hooks for kgdb, the Linux kernel source level
57 debugger. See <http://kgdb.sourceforge.net/> for more information.
58 Unless you are intending to debug the kernel, say N here.
80 bool "Enable serial console thru kgdb port"
81 depends on KGDB && 8xx || CPM2
83 If you enable this, all serial console messages will be sent
88 bool "Include xmon kernel debugger"
91 Include in-kernel hooks for the xmon kernel monitor/debugger.
92 Unless you are intending to debug the kernel, say N here.
93 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
94 nothing will appear on the screen (xmon writes directly to the
96 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
97 very early during boot. 'xmon=on' will just enable the xmon
98 debugger hooks. 'xmon=off' will disable the debugger hooks
99 if CONFIG_XMON_DEFAULT is set.
100 xmon will print a backtrace on the very first invocation.
101 'xmon=nobt' will disable this autobacktrace.
104 bool "Enable xmon by default"
107 xmon is normally disabled unless booted with 'xmon=on'.
108 Use 'xmon=off' to disable xmon init during runtime.
110 config XMON_DISASSEMBLY
111 bool "Include disassembly support in xmon"
115 Include support for disassembling in xmon. You probably want
116 to say Y here, unless you're building for a memory-constrained
120 bool "Use separate kernel stacks when processing interrupts"
123 If you say Y here the kernel will use separate kernel stacks
124 for handling hard and soft interrupts. This can help avoid
125 overflowing the process kernel stacks.
128 bool "Expose hardware/virtual IRQ mapping via debugfs"
129 depends on DEBUG_FS && PPC_MERGE
131 This option will show the mapping relationship between hardware irq
132 numbers and virtual irq numbers. The mapping is exposed via debugfs
133 in the file powerpc/virq_mapping.
135 If you don't know what this means you don't need it.
138 bool "Include BDI-2000 user context switcher"
139 depends on DEBUG_KERNEL && PPC32
141 Include in-kernel support for the Abatron BDI2000 debugger.
142 Unless you are intending to debug the kernel with one of these
143 machines, say N here.
146 bool "Support for early boot text console (BootX or OpenFirmware only)"
147 depends on PPC_OF && PPC_MULTIPLATFORM
149 Say Y here to see progress messages from the boot firmware in text
150 mode. Requires either BootX or Open Firmware.
152 config PPC_EARLY_DEBUG
153 bool "Early debugging (dangerous)"
155 Say Y to enable some early debugging facilities that may be available
156 for your processor/board combination. Those facilities are hacks
157 intended to debug problems early during boot, this should not be
158 enabled in a production kernel.
159 Note that enabling this will also cause the kernel default log level
160 to be pushed to max automatically very early during boot
163 prompt "Early debugging console"
164 depends on PPC_EARLY_DEBUG
166 Use the selected console for early debugging. Careful, if you
167 enable debugging for the wrong type of machine your kernel
170 config PPC_EARLY_DEBUG_LPAR
171 bool "LPAR HV Console"
172 depends on PPC_PSERIES
174 Select this to enable early debugging for a machine with a HVC
177 config PPC_EARLY_DEBUG_G5
179 depends on PPC_PMAC64
181 Select this to enable early debugging for Apple G5 machines.
183 config PPC_EARLY_DEBUG_RTAS_PANEL
187 Select this to enable early debugging via the RTAS panel.
189 config PPC_EARLY_DEBUG_RTAS_CONSOLE
192 select UDBG_RTAS_CONSOLE
194 Select this to enable early debugging via the RTAS console.
196 config PPC_EARLY_DEBUG_MAPLE
197 bool "Maple real mode"
200 Select this to enable early debugging for Maple.
202 config PPC_EARLY_DEBUG_ISERIES
203 bool "iSeries HV Console"
204 depends on PPC_ISERIES
206 Select this to enable early debugging for legacy iSeries. You need
207 to hit "Ctrl-x Ctrl-x" to see the messages on the console.
209 config PPC_EARLY_DEBUG_PAS_REALMODE
210 bool "PA Semi real mode"
211 depends on PPC_PASEMI
213 Select this to enable early debugging for PA Semi.
214 Output will be on UART0.
216 config PPC_EARLY_DEBUG_BEAT
217 bool "Beat HV Console"
218 depends on PPC_CELLEB
221 Select this to enable early debugging for Celleb with Beat.
223 config PPC_EARLY_DEBUG_44x
224 bool "Early serial debugging for IBM/AMCC 44x CPUs"
227 Select this to enable early debugging for IBM 44x chips via the
228 inbuilt serial port. If you enable this, ensure you set
229 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
231 config PPC_EARLY_DEBUG_40x
232 bool "Early serial debugging for IBM/AMCC 40x CPUs"
235 Select this to enable early debugging for IBM 40x chips via the
236 inbuilt serial port. This works on chips with a 16550 compatible
237 UART. Xilinx chips with uartlite cannot use this option.
239 config PPC_EARLY_DEBUG_CPM
240 bool "Early serial debugging for Freescale CPM-based serial ports"
241 depends on SERIAL_CPM
242 select PIN_TLB if PPC_8xx
244 Select this to enable early debugging for Freescale chips
245 using a CPM-based serial port. This assumes that the bootwrapper
246 has run, and set up the CPM in a particular way.
250 config PPC_EARLY_DEBUG_44x_PHYSLOW
251 hex "Low 32 bits of early debug UART physical address"
252 depends on PPC_EARLY_DEBUG_44x
255 You probably want 0x40000200 for ebony boards and
256 0x40000300 for taishan
258 config PPC_EARLY_DEBUG_44x_PHYSHIGH
259 hex "EPRN of early debug UART physical address"
260 depends on PPC_EARLY_DEBUG_44x
263 config PPC_EARLY_DEBUG_40x_PHYSADDR
264 hex "Early debug UART physical address"
265 depends on PPC_EARLY_DEBUG_40x
268 config PPC_EARLY_DEBUG_CPM_ADDR
269 hex "CPM UART early debug transmit descriptor address"
270 depends on PPC_EARLY_DEBUG_CPM
271 default "0xfa202008" if PPC_EP88XC
272 default "0xf0000008" if CPM2
273 default "0xff002008" if CPM1
275 This specifies the address of the transmit descriptor
276 used for early debug output. Because it is needed before
277 platform probing is done, all platforms selected must
278 share the same address.