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 && !SOFTWARE_SUSPEND
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 "Include BDI-2000 user context switcher"
129 depends on DEBUG_KERNEL && PPC32
131 Include in-kernel support for the Abatron BDI2000 debugger.
132 Unless you are intending to debug the kernel with one of these
133 machines, say N here.
136 bool "Support for early boot text console (BootX or OpenFirmware only)"
139 Say Y here to see progress messages from the boot firmware in text
140 mode. Requires either BootX or Open Firmware.
142 config PPC_EARLY_DEBUG
143 bool "Early debugging (dangerous)"
146 prompt "Early debugging console"
147 depends on PPC_EARLY_DEBUG
149 Use the selected console for early debugging. Careful, if you
150 enable debugging for the wrong type of machine your kernel
153 config PPC_EARLY_DEBUG_LPAR
154 bool "LPAR HV Console"
155 depends on PPC_PSERIES
157 Select this to enable early debugging for a machine with a HVC
160 config PPC_EARLY_DEBUG_G5
162 depends on PPC_PMAC64
164 Select this to enable early debugging for Apple G5 machines.
166 config PPC_EARLY_DEBUG_RTAS_PANEL
170 Select this to enable early debugging via the RTAS panel.
172 config PPC_EARLY_DEBUG_RTAS_CONSOLE
175 select UDBG_RTAS_CONSOLE
177 Select this to enable early debugging via the RTAS console.
179 config PPC_EARLY_DEBUG_MAPLE
180 bool "Maple real mode"
183 Select this to enable early debugging for Maple.
185 config PPC_EARLY_DEBUG_ISERIES
186 bool "iSeries HV Console"
187 depends on PPC_ISERIES
189 Select this to enable early debugging for legacy iSeries. You need
190 to hit "Ctrl-x Ctrl-x" to see the messages on the console.
192 config PPC_EARLY_DEBUG_PAS_REALMODE
193 bool "PA Semi real mode"
194 depends on PPC_PASEMI
196 Select this to enable early debugging for PA Semi.
197 Output will be on UART0.
199 config PPC_EARLY_DEBUG_BEAT
200 bool "Beat HV Console"
201 depends on PPC_CELLEB
204 Select this to enable early debugging for Celleb with Beat.
206 config PPC_EARLY_DEBUG_44x
207 bool "Early serial debugging for IBM/AMCC 44x CPUs"
209 select PPC_UDBG_16550
211 Select this to enable early debugging for IBM 44x chips via the
216 config PPC_EARLY_DEBUG_44x_PHYSLOW
217 hex "Low 32 bits of early debug UART physical address"
218 depends PPC_EARLY_DEBUG_44x
221 config PPC_EARLY_DEBUG_44x_PHYSHIGH
222 hex "EPRN of early debug UART physical address"
223 depends PPC_EARLY_DEBUG_44x