1 # SPDX-License-Identifier: GPL-2.0
3 config PPC_DISABLE_WERROR
4 bool "Don't build arch/powerpc code with -Werror"
6 This option tells the compiler NOT to build the code under
7 arch/powerpc with the -Werror flag (which means warnings
8 are treated as errors).
10 Only enable this if you are hitting a build failure in the
11 arch/powerpc code caused by a warning, and you don't feel
16 depends on !PPC_DISABLE_WERROR
19 config PRINT_STACK_DEPTH
20 int "Stack depth to print" if DEBUG_KERNEL
23 This option allows you to set the stack depth that the kernel
24 prints in stack traces. This can be useful if your display is
25 too small and stack traces cause important information to
26 scroll off the screen.
29 bool "Hypervisor call instrumentation"
30 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
32 Adds code to keep track of the number of hypervisor calls made and
33 the amount of time spent in hypervisor calls. Wall time spent in
34 each call is always calculated, and if available CPU cycles spent
35 are also calculated. A directory named hcall_inst is added at the
36 root of the debugfs filesystem. Within the hcall_inst directory
37 are files that contain CPU specific call statistics.
39 This option will add a small amount of overhead to all hypervisor
42 config PPC_EMULATED_STATS
43 bool "Emulated instructions tracking"
46 Adds code to keep track of the number of instructions that are
47 emulated by the in-kernel emulator. Counters for the various classes
48 of emulated instructions are available under
49 powerpc/emulated_instructions/ in the root of the debugfs file
50 system. Optionally (controlled by
51 powerpc/emulated_instructions/do_warn in debugfs), rate-limited
52 warnings can be printed to the console when instructions are
55 config CODE_PATCHING_SELFTEST
56 bool "Run self-tests of the code-patching code"
57 depends on DEBUG_KERNEL
59 config JUMP_LABEL_FEATURE_CHECKS
60 bool "Enable use of jump label for cpu/mmu_has_feature()"
64 Selecting this options enables use of jump labels for some internal
65 feature checks. This should generate more optimal code for those
68 config JUMP_LABEL_FEATURE_CHECK_DEBUG
69 bool "Do extra check on feature fixup calls"
70 depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS
72 This tries to catch incorrect usage of cpu_has_feature() and
73 mmu_has_feature() in the code.
75 If you don't know what this means, say N.
77 config FTR_FIXUP_SELFTEST
78 bool "Run self-tests of the feature-fixup code"
79 depends on DEBUG_KERNEL
81 config MSI_BITMAP_SELFTEST
82 bool "Run self-tests of the MSI bitmap code"
83 depends on DEBUG_KERNEL
85 config PPC_IRQ_SOFT_MASK_DEBUG
86 bool "Include extra checks for powerpc irq soft masking"
89 config PPC_RFI_SRR_DEBUG
90 bool "Include extra checks for RFI SRR register validity"
91 depends on PPC_BOOK3S_64
94 bool "Include xmon kernel debugger"
95 depends on DEBUG_KERNEL
96 select CONSOLE_POLL if SERIAL_CPM_CONSOLE
98 Include in-kernel hooks for the xmon kernel monitor/debugger.
99 Unless you are intending to debug the kernel, say N here.
100 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
101 nothing will appear on the screen (xmon writes directly to the
103 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
104 very early during boot. 'xmon=on' will just enable the xmon
105 debugger hooks. 'xmon=off' will disable the debugger hooks
106 if CONFIG_XMON_DEFAULT is set.
107 xmon will print a backtrace on the very first invocation.
108 'xmon=nobt' will disable this autobacktrace.
111 bool "Enable xmon by default"
114 xmon is normally disabled unless booted with 'xmon=on'.
115 Use 'xmon=off' to disable xmon init during runtime.
117 config XMON_DISASSEMBLY
118 bool "Include disassembly support in xmon"
122 Include support for disassembling in xmon. You probably want
123 to say Y here, unless you're building for a memory-constrained
126 config XMON_DEFAULT_RO_MODE
127 bool "Restrict xmon to read-only operations by default"
131 Operate xmon in read-only mode. The cmdline options 'xmon=rw' and
132 'xmon=ro' override this default.
136 depends on KGDB || XMON
140 bool "Include BDI-2000 user context switcher"
141 depends on DEBUG_KERNEL && PPC32
143 Include in-kernel support for the Abatron BDI2000 debugger.
144 Unless you are intending to debug the kernel with one of these
145 machines, say N here.
148 bool "Support for early boot text console (BootX or OpenFirmware only)"
149 depends on PPC_BOOK3S
151 Say Y here to see progress messages from the boot firmware in text
152 mode. Requires either BootX or Open Firmware.
154 config PPC_EARLY_DEBUG
155 bool "Early debugging (dangerous)"
157 Say Y to enable some early debugging facilities that may be available
158 for your processor/board combination. Those facilities are hacks
159 intended to debug problems early during boot, this should not be
160 enabled in a production kernel.
161 Note that enabling this will also cause the kernel default log level
162 to be pushed to max automatically very early during boot
165 prompt "Early debugging console"
166 depends on PPC_EARLY_DEBUG
168 Use the selected console for early debugging. Careful, if you
169 enable debugging for the wrong type of machine your kernel
172 config PPC_EARLY_DEBUG_BOOTX
173 bool "BootX or OpenFirmware"
174 depends on BOOTX_TEXT
176 Select this to enable early debugging for a machine using BootX
179 config PPC_EARLY_DEBUG_LPAR
180 bool "LPAR HV Console"
181 depends on PPC_PSERIES && HVC_CONSOLE
183 Select this to enable early debugging for a machine with a HVC
186 config PPC_EARLY_DEBUG_LPAR_HVSI
187 bool "LPAR HVSI Console"
188 depends on PPC_PSERIES && HVC_CONSOLE
190 Select this to enable early debugging for a machine with a HVSI
191 console on a specified vterm.
193 config PPC_EARLY_DEBUG_G5
195 depends on PPC_PMAC64
197 Select this to enable early debugging for Apple G5 machines.
199 config PPC_EARLY_DEBUG_RTAS_PANEL
203 Select this to enable early debugging via the RTAS panel.
205 config PPC_EARLY_DEBUG_RTAS_CONSOLE
208 select UDBG_RTAS_CONSOLE
210 Select this to enable early debugging via the RTAS console.
212 config PPC_EARLY_DEBUG_MAPLE
213 bool "Maple real mode"
216 Select this to enable early debugging for Maple.
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_44x
226 bool "Early serial debugging for IBM/AMCC 44x CPUs"
229 Select this to enable early debugging for IBM 44x chips via the
230 inbuilt serial port. If you enable this, ensure you set
231 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
233 config PPC_EARLY_DEBUG_40x
234 bool "Early serial debugging for IBM/AMCC 40x CPUs"
237 Select this to enable early debugging for IBM 40x chips via the
238 inbuilt serial port. This works on chips with a 16550 compatible
241 config PPC_EARLY_DEBUG_CPM
242 bool "Early serial debugging for Freescale CPM-based serial ports"
243 depends on SERIAL_CPM
245 Select this to enable early debugging for Freescale chips
246 using a CPM-based serial port. This assumes that the bootwrapper
247 has run, and set up the CPM in a particular way.
249 config PPC_EARLY_DEBUG_USBGECKO
250 bool "Early debugging through the USB Gecko adapter"
251 depends on GAMECUBE_COMMON
254 Select this to enable early debugging for Nintendo GameCube/Wii
255 consoles via an external USB Gecko adapter.
257 config PPC_EARLY_DEBUG_PS3GELIC
258 bool "Early debugging through the PS3 Ethernet port"
262 Select this to enable early debugging for the PlayStation3 via
263 UDP broadcasts sent out through the Ethernet port.
265 config PPC_EARLY_DEBUG_OPAL_RAW
266 bool "OPAL raw console"
269 Select this to enable early debugging for the PowerNV platform
270 using a "raw" console
272 config PPC_EARLY_DEBUG_OPAL_HVSI
273 bool "OPAL hvsi console"
276 Select this to enable early debugging for the PowerNV platform
277 using an "hvsi" console
279 config PPC_EARLY_DEBUG_MEMCONS
280 bool "In memory console"
282 Select this to enable early debugging using an in memory console.
283 This console provides input and output buffers stored within the
284 kernel BSS and should be safe to select on any system. A debugger
285 can then be used to read kernel output or send input to the console.
288 config PPC_MEMCONS_OUTPUT_SIZE
289 int "In memory console output buffer size"
290 depends on PPC_EARLY_DEBUG_MEMCONS
293 Selects the size of the output buffer (in bytes) of the in memory
296 config PPC_MEMCONS_INPUT_SIZE
297 int "In memory console input buffer size"
298 depends on PPC_EARLY_DEBUG_MEMCONS
301 Selects the size of the input buffer (in bytes) of the in memory
304 config PPC_EARLY_DEBUG_OPAL
306 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
309 config PPC_EARLY_DEBUG_HVSI_VTERMNO
310 hex "vterm number to use with early debug HVSI"
311 depends on PPC_EARLY_DEBUG_LPAR_HVSI
314 You probably want 0x30000000 for your first serial port and
315 0x30000001 for your second one
317 config PPC_EARLY_DEBUG_OPAL_VTERMNO
318 hex "vterm number to use with OPAL early debug"
319 depends on PPC_EARLY_DEBUG_OPAL
322 This correspond to which /dev/hvcN you want to use for early
325 On OPAL v2, this will be 0 for network console and 1 or 2 for
326 the machine built-in serial ports.
328 config PPC_EARLY_DEBUG_44x_PHYSLOW
329 hex "Low 32 bits of early debug UART physical address"
330 depends on PPC_EARLY_DEBUG_44x
333 You probably want 0x40000200 for ebony boards and
334 0x40000300 for taishan
336 config PPC_EARLY_DEBUG_44x_PHYSHIGH
337 hex "EPRN of early debug UART physical address"
338 depends on PPC_EARLY_DEBUG_44x
341 config PPC_EARLY_DEBUG_40x_PHYSADDR
342 hex "Early debug UART physical address"
343 depends on PPC_EARLY_DEBUG_40x
346 config PPC_EARLY_DEBUG_CPM_ADDR
347 hex "CPM UART early debug transmit descriptor address"
348 depends on PPC_EARLY_DEBUG_CPM
349 default "0xfa202008" if PPC_EP88XC
350 default "0xf0001ff8" if CPM2
351 default "0xff002008" if CPM1
353 This specifies the address of the transmit descriptor
354 used for early debug output. Because it is needed before
355 platform probing is done, all platforms selected must
356 share the same address.
359 bool "Fault-injection capability for IOMMU"
360 depends on FAULT_INJECTION
361 depends on PCI || IBMVIO
363 Provide fault-injection capability for IOMMU. Each device can
364 be selectively enabled via the fail_iommu property.
366 If you are unsure, say N.
369 bool "Export kernel pagetable layout to userspace via debugfs"
370 depends on DEBUG_KERNEL && DEBUG_FS
372 This option exports the state of the kernel pagetables to a
373 debugfs file. This is only useful for kernel developers who are
374 working in architecture specific areas of the kernel - probably
375 not a good idea to enable this feature in a production kernel.
377 If you are unsure, say N.
380 bool "Warn on W+X mappings at boot"
381 depends on PPC_PTDUMP && STRICT_KERNEL_RWX
383 Generate a warning if any W+X mappings are found at boot.
385 This is useful for discovering cases where the kernel is leaving
386 W+X mappings after applying NX, as such mappings are a security risk.
388 Note that even if the check fails, your kernel is possibly
389 still fine, as W+X mappings are not a security hole in
390 themselves, what they do is that they make the exploitation
391 of other unfixed kernel bugs easier.
393 There is no runtime or memory usage effect of this option
394 once the kernel has booted up - it's a one time check.
396 If in doubt, say "Y".
398 config PPC_FAST_ENDIAN_SWITCH
399 bool "Deprecated fast endian-switch syscall"
400 depends on DEBUG_KERNEL && PPC_BOOK3S_64
402 If you're unsure what this is, say N.
404 config KASAN_SHADOW_OFFSET