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.
39 bool "Hypervisor call instrumentation"
40 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
42 Adds code to keep track of the number of hypervisor calls made and
43 the amount of time spent in hypervisor calls. Wall time spent in
44 each call is always calculated, and if available CPU cycles spent
45 are also calculated. A directory named hcall_inst is added at the
46 root of the debugfs filesystem. Within the hcall_inst directory
47 are files that contain CPU specific call statistics.
49 This option will add a small amount of overhead to all hypervisor
52 config PPC_EMULATED_STATS
53 bool "Emulated instructions tracking"
56 Adds code to keep track of the number of instructions that are
57 emulated by the in-kernel emulator. Counters for the various classes
58 of emulated instructions are available under
59 powerpc/emulated_instructions/ in the root of the debugfs file
60 system. Optionally (controlled by
61 powerpc/emulated_instructions/do_warn in debugfs), rate-limited
62 warnings can be printed to the console when instructions are
65 config CODE_PATCHING_SELFTEST
66 bool "Run self-tests of the code-patching code."
67 depends on DEBUG_KERNEL
70 config FTR_FIXUP_SELFTEST
71 bool "Run self-tests of the feature-fixup code."
72 depends on DEBUG_KERNEL
75 config MSI_BITMAP_SELFTEST
76 bool "Run self-tests of the MSI bitmap code."
77 depends on DEBUG_KERNEL
81 bool "Include xmon kernel debugger"
82 depends on DEBUG_KERNEL
84 Include in-kernel hooks for the xmon kernel monitor/debugger.
85 Unless you are intending to debug the kernel, say N here.
86 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
87 nothing will appear on the screen (xmon writes directly to the
89 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
90 very early during boot. 'xmon=on' will just enable the xmon
91 debugger hooks. 'xmon=off' will disable the debugger hooks
92 if CONFIG_XMON_DEFAULT is set.
93 xmon will print a backtrace on the very first invocation.
94 'xmon=nobt' will disable this autobacktrace.
97 bool "Enable xmon by default"
100 xmon is normally disabled unless booted with 'xmon=on'.
101 Use 'xmon=off' to disable xmon init during runtime.
103 config XMON_DISASSEMBLY
104 bool "Include disassembly support in xmon"
108 Include support for disassembling in xmon. You probably want
109 to say Y here, unless you're building for a memory-constrained
114 depends on KGDB || XMON
118 bool "Expose hardware/virtual IRQ mapping via debugfs"
121 This option will show the mapping relationship between hardware irq
122 numbers and virtual irq numbers. The mapping is exposed via debugfs
123 in the file powerpc/virq_mapping.
125 If you don't know what this means you don't need it.
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)"
137 depends on PPC_OF && PPC_BOOK3S
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)"
145 Say Y to enable some early debugging facilities that may be available
146 for your processor/board combination. Those facilities are hacks
147 intended to debug problems early during boot, this should not be
148 enabled in a production kernel.
149 Note that enabling this will also cause the kernel default log level
150 to be pushed to max automatically very early during boot
153 prompt "Early debugging console"
154 depends on PPC_EARLY_DEBUG
156 Use the selected console for early debugging. Careful, if you
157 enable debugging for the wrong type of machine your kernel
160 config PPC_EARLY_DEBUG_LPAR
161 bool "LPAR HV Console"
162 depends on PPC_PSERIES
164 Select this to enable early debugging for a machine with a HVC
167 config PPC_EARLY_DEBUG_LPAR_HVSI
168 bool "LPAR HVSI Console"
169 depends on PPC_PSERIES
171 Select this to enable early debugging for a machine with a HVSI
172 console on a specified vterm.
174 config PPC_EARLY_DEBUG_G5
176 depends on PPC_PMAC64
178 Select this to enable early debugging for Apple G5 machines.
180 config PPC_EARLY_DEBUG_RTAS_PANEL
184 Select this to enable early debugging via the RTAS panel.
186 config PPC_EARLY_DEBUG_RTAS_CONSOLE
189 select UDBG_RTAS_CONSOLE
191 Select this to enable early debugging via the RTAS console.
193 config PPC_EARLY_DEBUG_MAPLE
194 bool "Maple real mode"
197 Select this to enable early debugging for Maple.
199 config PPC_EARLY_DEBUG_PAS_REALMODE
200 bool "PA Semi real mode"
201 depends on PPC_PASEMI
203 Select this to enable early debugging for PA Semi.
204 Output will be on UART0.
206 config PPC_EARLY_DEBUG_BEAT
207 bool "Beat HV Console"
208 depends on PPC_CELLEB
211 Select this to enable early debugging for Celleb with Beat.
213 config PPC_EARLY_DEBUG_44x
214 bool "Early serial debugging for IBM/AMCC 44x CPUs"
215 # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
216 # mark, which doesn't work with current 440 KVM.
217 depends on 44x && !KVM
219 Select this to enable early debugging for IBM 44x chips via the
220 inbuilt serial port. If you enable this, ensure you set
221 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
223 config PPC_EARLY_DEBUG_40x
224 bool "Early serial debugging for IBM/AMCC 40x CPUs"
227 Select this to enable early debugging for IBM 40x chips via the
228 inbuilt serial port. This works on chips with a 16550 compatible
229 UART. Xilinx chips with uartlite cannot use this option.
231 config PPC_EARLY_DEBUG_CPM
232 bool "Early serial debugging for Freescale CPM-based serial ports"
233 depends on SERIAL_CPM
234 select PIN_TLB if PPC_8xx
236 Select this to enable early debugging for Freescale chips
237 using a CPM-based serial port. This assumes that the bootwrapper
238 has run, and set up the CPM in a particular way.
240 config PPC_EARLY_DEBUG_USBGECKO
241 bool "Early debugging through the USB Gecko adapter"
242 depends on GAMECUBE_COMMON
245 Select this to enable early debugging for Nintendo GameCube/Wii
246 consoles via an external USB Gecko adapter.
248 config PPC_EARLY_DEBUG_WSP
249 bool "Early debugging via WSP's internal UART"
251 select PPC_UDBG_16550
253 config PPC_EARLY_DEBUG_PS3GELIC
254 bool "Early debugging through the PS3 Ethernet port"
258 Select this to enable early debugging for the PlayStation3 via
259 UDP broadcasts sent out through the Ethernet port.
261 config PPC_EARLY_DEBUG_OPAL_RAW
262 bool "OPAL raw console"
265 Select this to enable early debugging for the PowerNV platform
266 using a "raw" console
268 config PPC_EARLY_DEBUG_OPAL_HVSI
269 bool "OPAL hvsi console"
272 Select this to enable early debugging for the PowerNV platform
273 using an "hvsi" console
277 config PPC_EARLY_DEBUG_OPAL
279 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
282 config PPC_EARLY_DEBUG_HVSI_VTERMNO
283 hex "vterm number to use with early debug HVSI"
284 depends on PPC_EARLY_DEBUG_LPAR_HVSI
287 You probably want 0x30000000 for your first serial port and
288 0x30000001 for your second one
290 config PPC_EARLY_DEBUG_OPAL_VTERMNO
291 hex "vterm number to use with OPAL early debug"
292 depends on PPC_EARLY_DEBUG_OPAL
295 This correspond to which /dev/hvcN you want to use for early
298 On OPAL v1 (takeover) this should always be 0
299 On OPAL v2, this will be 0 for network console and 1 or 2 for
300 the machine built-in serial ports.
302 config PPC_EARLY_DEBUG_44x_PHYSLOW
303 hex "Low 32 bits of early debug UART physical address"
304 depends on PPC_EARLY_DEBUG_44x
307 You probably want 0x40000200 for ebony boards and
308 0x40000300 for taishan
310 config PPC_EARLY_DEBUG_44x_PHYSHIGH
311 hex "EPRN of early debug UART physical address"
312 depends on PPC_EARLY_DEBUG_44x
315 config PPC_EARLY_DEBUG_40x_PHYSADDR
316 hex "Early debug UART physical address"
317 depends on PPC_EARLY_DEBUG_40x
320 config PPC_EARLY_DEBUG_CPM_ADDR
321 hex "CPM UART early debug transmit descriptor address"
322 depends on PPC_EARLY_DEBUG_CPM
323 default "0xfa202008" if PPC_EP88XC
324 default "0xf0001ff8" if CPM2
325 default "0xff002008" if CPM1
327 This specifies the address of the transmit descriptor
328 used for early debug output. Because it is needed before
329 platform probing is done, all platforms selected must
330 share the same address.
334 prompt "Filter access to /dev/mem"
336 This option restricts access to /dev/mem. If this option is
337 disabled, you allow userspace access to all memory, including
338 kernel and userspace memory. Accidental memory access is likely
340 Memory access is required for experts who want to debug the kernel.
342 If you are unsure, say Y.