1 # SPDX-License-Identifier: GPL-2.0
4 source "lib/Kconfig.debug"
6 config PPC_DISABLE_WERROR
7 bool "Don't build arch/powerpc code with -Werror"
10 This option tells the compiler NOT to build the code under
11 arch/powerpc with the -Werror flag (which means warnings
12 are treated as errors).
14 Only enable this if you are hitting a build failure in the
15 arch/powerpc code caused by a warning, and you don't feel
20 depends on !PPC_DISABLE_WERROR
23 config PRINT_STACK_DEPTH
24 int "Stack depth to print" if DEBUG_KERNEL
27 This option allows you to set the stack depth that the kernel
28 prints in stack traces. This can be useful if your display is
29 too small and stack traces cause important information to
30 scroll off the screen.
33 bool "Hypervisor call instrumentation"
34 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
36 Adds code to keep track of the number of hypervisor calls made and
37 the amount of time spent in hypervisor calls. Wall time spent in
38 each call is always calculated, and if available CPU cycles spent
39 are also calculated. A directory named hcall_inst is added at the
40 root of the debugfs filesystem. Within the hcall_inst directory
41 are files that contain CPU specific call statistics.
43 This option will add a small amount of overhead to all hypervisor
46 config PPC_EMULATED_STATS
47 bool "Emulated instructions tracking"
50 Adds code to keep track of the number of instructions that are
51 emulated by the in-kernel emulator. Counters for the various classes
52 of emulated instructions are available under
53 powerpc/emulated_instructions/ in the root of the debugfs file
54 system. Optionally (controlled by
55 powerpc/emulated_instructions/do_warn in debugfs), rate-limited
56 warnings can be printed to the console when instructions are
59 config CODE_PATCHING_SELFTEST
60 bool "Run self-tests of the code-patching code"
61 depends on DEBUG_KERNEL
64 config JUMP_LABEL_FEATURE_CHECKS
65 bool "Enable use of jump label for cpu/mmu_has_feature()"
69 Selecting this options enables use of jump labels for some internal
70 feature checks. This should generate more optimal code for those
73 config JUMP_LABEL_FEATURE_CHECK_DEBUG
74 bool "Do extra check on feature fixup calls"
75 depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS
78 This tries to catch incorrect usage of cpu_has_feature() and
79 mmu_has_feature() in the code.
81 If you don't know what this means, say N.
83 config FTR_FIXUP_SELFTEST
84 bool "Run self-tests of the feature-fixup code"
85 depends on DEBUG_KERNEL
88 config MSI_BITMAP_SELFTEST
89 bool "Run self-tests of the MSI bitmap code"
90 depends on DEBUG_KERNEL
94 bool "Include xmon kernel debugger"
95 depends on DEBUG_KERNEL
97 Include in-kernel hooks for the xmon kernel monitor/debugger.
98 Unless you are intending to debug the kernel, say N here.
99 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
100 nothing will appear on the screen (xmon writes directly to the
102 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
103 very early during boot. 'xmon=on' will just enable the xmon
104 debugger hooks. 'xmon=off' will disable the debugger hooks
105 if CONFIG_XMON_DEFAULT is set.
106 xmon will print a backtrace on the very first invocation.
107 'xmon=nobt' will disable this autobacktrace.
110 bool "Enable xmon by default"
113 xmon is normally disabled unless booted with 'xmon=on'.
114 Use 'xmon=off' to disable xmon init during runtime.
116 config XMON_DISASSEMBLY
117 bool "Include disassembly support in xmon"
121 Include support for disassembling in xmon. You probably want
122 to say Y here, unless you're building for a memory-constrained
127 depends on KGDB || XMON
131 bool "Include BDI-2000 user context switcher"
132 depends on DEBUG_KERNEL && PPC32
134 Include in-kernel support for the Abatron BDI2000 debugger.
135 Unless you are intending to debug the kernel with one of these
136 machines, say N here.
139 bool "Support for early boot text console (BootX or OpenFirmware only)"
140 depends on PPC_BOOK3S
142 Say Y here to see progress messages from the boot firmware in text
143 mode. Requires either BootX or Open Firmware.
145 config PPC_EARLY_DEBUG
146 bool "Early debugging (dangerous)"
148 Say Y to enable some early debugging facilities that may be available
149 for your processor/board combination. Those facilities are hacks
150 intended to debug problems early during boot, this should not be
151 enabled in a production kernel.
152 Note that enabling this will also cause the kernel default log level
153 to be pushed to max automatically very early during boot
156 prompt "Early debugging console"
157 depends on PPC_EARLY_DEBUG
159 Use the selected console for early debugging. Careful, if you
160 enable debugging for the wrong type of machine your kernel
163 config PPC_EARLY_DEBUG_BOOTX
164 bool "BootX or OpenFirmware"
165 depends on BOOTX_TEXT
167 Select this to enable early debugging for a machine using BootX
170 config PPC_EARLY_DEBUG_LPAR
171 bool "LPAR HV Console"
172 depends on PPC_PSERIES && HVC_CONSOLE
174 Select this to enable early debugging for a machine with a HVC
177 config PPC_EARLY_DEBUG_LPAR_HVSI
178 bool "LPAR HVSI Console"
179 depends on PPC_PSERIES && HVC_CONSOLE
181 Select this to enable early debugging for a machine with a HVSI
182 console on a specified vterm.
184 config PPC_EARLY_DEBUG_G5
186 depends on PPC_PMAC64
188 Select this to enable early debugging for Apple G5 machines.
190 config PPC_EARLY_DEBUG_RTAS_PANEL
194 Select this to enable early debugging via the RTAS panel.
196 config PPC_EARLY_DEBUG_RTAS_CONSOLE
199 select UDBG_RTAS_CONSOLE
201 Select this to enable early debugging via the RTAS console.
203 config PPC_EARLY_DEBUG_MAPLE
204 bool "Maple real mode"
207 Select this to enable early debugging for Maple.
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_44x
217 bool "Early serial debugging for IBM/AMCC 44x CPUs"
220 Select this to enable early debugging for IBM 44x chips via the
221 inbuilt serial port. If you enable this, ensure you set
222 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
224 config PPC_EARLY_DEBUG_40x
225 bool "Early serial debugging for IBM/AMCC 40x CPUs"
228 Select this to enable early debugging for IBM 40x chips via the
229 inbuilt serial port. This works on chips with a 16550 compatible
230 UART. Xilinx chips with uartlite cannot use this option.
232 config PPC_EARLY_DEBUG_CPM
233 bool "Early serial debugging for Freescale CPM-based serial ports"
234 depends on SERIAL_CPM
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_PS3GELIC
249 bool "Early debugging through the PS3 Ethernet port"
253 Select this to enable early debugging for the PlayStation3 via
254 UDP broadcasts sent out through the Ethernet port.
256 config PPC_EARLY_DEBUG_OPAL_RAW
257 bool "OPAL raw console"
260 Select this to enable early debugging for the PowerNV platform
261 using a "raw" console
263 config PPC_EARLY_DEBUG_OPAL_HVSI
264 bool "OPAL hvsi console"
267 Select this to enable early debugging for the PowerNV platform
268 using an "hvsi" console
270 config PPC_EARLY_DEBUG_MEMCONS
271 bool "In memory console"
273 Select this to enable early debugging using an in memory console.
274 This console provides input and output buffers stored within the
275 kernel BSS and should be safe to select on any system. A debugger
276 can then be used to read kernel output or send input to the console.
279 config PPC_MEMCONS_OUTPUT_SIZE
280 int "In memory console output buffer size"
281 depends on PPC_EARLY_DEBUG_MEMCONS
284 Selects the size of the output buffer (in bytes) of the in memory
287 config PPC_MEMCONS_INPUT_SIZE
288 int "In memory console input buffer size"
289 depends on PPC_EARLY_DEBUG_MEMCONS
292 Selects the size of the input buffer (in bytes) of the in memory
295 config PPC_EARLY_DEBUG_OPAL
297 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
300 config PPC_EARLY_DEBUG_HVSI_VTERMNO
301 hex "vterm number to use with early debug HVSI"
302 depends on PPC_EARLY_DEBUG_LPAR_HVSI
305 You probably want 0x30000000 for your first serial port and
306 0x30000001 for your second one
308 config PPC_EARLY_DEBUG_OPAL_VTERMNO
309 hex "vterm number to use with OPAL early debug"
310 depends on PPC_EARLY_DEBUG_OPAL
313 This correspond to which /dev/hvcN you want to use for early
316 On OPAL v2, this will be 0 for network console and 1 or 2 for
317 the machine built-in serial ports.
319 config PPC_EARLY_DEBUG_44x_PHYSLOW
320 hex "Low 32 bits of early debug UART physical address"
321 depends on PPC_EARLY_DEBUG_44x
324 You probably want 0x40000200 for ebony boards and
325 0x40000300 for taishan
327 config PPC_EARLY_DEBUG_44x_PHYSHIGH
328 hex "EPRN of early debug UART physical address"
329 depends on PPC_EARLY_DEBUG_44x
332 config PPC_EARLY_DEBUG_40x_PHYSADDR
333 hex "Early debug UART physical address"
334 depends on PPC_EARLY_DEBUG_40x
337 config PPC_EARLY_DEBUG_CPM_ADDR
338 hex "CPM UART early debug transmit descriptor address"
339 depends on PPC_EARLY_DEBUG_CPM
340 default "0xfa202008" if PPC_EP88XC
341 default "0xf0001ff8" if CPM2
342 default "0xff002008" if CPM1
344 This specifies the address of the transmit descriptor
345 used for early debug output. Because it is needed before
346 platform probing is done, all platforms selected must
347 share the same address.
350 bool "Fault-injection capability for IOMMU"
351 depends on FAULT_INJECTION
353 Provide fault-injection capability for IOMMU. Each device can
354 be selectively enabled via the fail_iommu property.
356 If you are unsure, say N.
359 bool "Export kernel pagetable layout to userspace via debugfs"
360 depends on DEBUG_KERNEL && DEBUG_FS
362 This option exports the state of the kernel pagetables to a
363 debugfs file. This is only useful for kernel developers who are
364 working in architecture specific areas of the kernel - probably
365 not a good idea to enable this feature in a production kernel.
367 If you are unsure, say N.
371 depends on PPC_PTDUMP && PPC_BOOK3S