Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1# SPDX-License-Identifier: GPL-2.0
2
3config PPC_DISABLE_WERROR
4 bool "Don't build arch/powerpc code with -Werror"
5 help
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).
9
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
12 inclined to fix it.
13
14config PPC_WERROR
15 bool
16 depends on !PPC_DISABLE_WERROR
17 default y
18
19config PRINT_STACK_DEPTH
20 int "Stack depth to print" if DEBUG_KERNEL
21 default 64
22 help
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.
27
28config HCALL_STATS
29 bool "Hypervisor call instrumentation"
30 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
31 help
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.
38
39 This option will add a small amount of overhead to all hypervisor
40 calls.
41
42config PPC_EMULATED_STATS
43 bool "Emulated instructions tracking"
44 depends on DEBUG_FS
45 help
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
53 emulated.
54
55config CODE_PATCHING_SELFTEST
56 bool "Run self-tests of the code-patching code"
57 depends on DEBUG_KERNEL
58
59config JUMP_LABEL_FEATURE_CHECKS
60 bool "Enable use of jump label for cpu/mmu_has_feature()"
61 depends on JUMP_LABEL
62 default y
63 help
64 Selecting this options enables use of jump labels for some internal
65 feature checks. This should generate more optimal code for those
66 checks.
67
68config JUMP_LABEL_FEATURE_CHECK_DEBUG
69 bool "Do extra check on feature fixup calls"
70 depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS
71 help
72 This tries to catch incorrect usage of cpu_has_feature() and
73 mmu_has_feature() in the code.
74
75 If you don't know what this means, say N.
76
77config FTR_FIXUP_SELFTEST
78 bool "Run self-tests of the feature-fixup code"
79 depends on DEBUG_KERNEL
80
81config MSI_BITMAP_SELFTEST
82 bool "Run self-tests of the MSI bitmap code"
83 depends on DEBUG_KERNEL
84
85config GUEST_STATE_BUFFER_TEST
86 def_tristate n
87 prompt "Enable Guest State Buffer unit tests"
88 depends on KUNIT
89 depends on KVM_BOOK3S_HV_POSSIBLE
90 default KUNIT_ALL_TESTS
91 help
92 The Guest State Buffer is a data format specified in the PAPR.
93 It is by hcalls to communicate the state of L2 guests between
94 the L1 and L0 hypervisors. Enable unit tests for the library
95 used to create and use guest state buffers.
96
97config PPC_IRQ_SOFT_MASK_DEBUG
98 bool "Include extra checks for powerpc irq soft masking"
99 depends on PPC64
100
101config PPC_RFI_SRR_DEBUG
102 bool "Include extra checks for RFI SRR register validity"
103 depends on PPC_BOOK3S_64
104
105config XMON
106 bool "Include xmon kernel debugger"
107 depends on DEBUG_KERNEL
108 select CONSOLE_POLL if SERIAL_CPM_CONSOLE
109 help
110 Include in-kernel hooks for the xmon kernel monitor/debugger.
111 Unless you are intending to debug the kernel, say N here.
112 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
113 nothing will appear on the screen (xmon writes directly to the
114 framebuffer memory).
115 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
116 very early during boot. 'xmon=on' will just enable the xmon
117 debugger hooks. 'xmon=off' will disable the debugger hooks
118 if CONFIG_XMON_DEFAULT is set.
119 xmon will print a backtrace on the very first invocation.
120 'xmon=nobt' will disable this autobacktrace.
121
122config XMON_DEFAULT
123 bool "Enable xmon by default"
124 depends on XMON
125 help
126 xmon is normally disabled unless booted with 'xmon=on'.
127 Use 'xmon=off' to disable xmon init during runtime.
128
129config XMON_DISASSEMBLY
130 bool "Include disassembly support in xmon"
131 depends on XMON
132 default y
133 help
134 Include support for disassembling in xmon. You probably want
135 to say Y here, unless you're building for a memory-constrained
136 system.
137
138config XMON_DEFAULT_RO_MODE
139 bool "Restrict xmon to read-only operations by default"
140 depends on XMON
141 default y
142 help
143 Operate xmon in read-only mode. The cmdline options 'xmon=rw' and
144 'xmon=ro' override this default.
145
146config DEBUGGER
147 bool
148 depends on KGDB || XMON
149 default y
150
151config BDI_SWITCH
152 bool "Include BDI-2000 user context switcher"
153 depends on DEBUG_KERNEL && PPC32
154 help
155 Include in-kernel support for the Abatron BDI2000 debugger.
156 Unless you are intending to debug the kernel with one of these
157 machines, say N here.
158
159config BOOTX_TEXT
160 bool "Support for early boot text console (BootX or OpenFirmware only)"
161 depends on PPC_BOOK3S
162 select FONT_SUN8x16
163 select FONT_SUPPORT
164 help
165 Say Y here to see progress messages from the boot firmware in text
166 mode. Requires either BootX or Open Firmware.
167
168config PPC_EARLY_DEBUG
169 bool "Early debugging (dangerous)"
170 help
171 Say Y to enable some early debugging facilities that may be available
172 for your processor/board combination. Those facilities are hacks
173 intended to debug problems early during boot, this should not be
174 enabled in a production kernel.
175 Note that enabling this will also cause the kernel default log level
176 to be pushed to max automatically very early during boot
177
178choice
179 prompt "Early debugging console"
180 depends on PPC_EARLY_DEBUG
181 help
182 Use the selected console for early debugging. Careful, if you
183 enable debugging for the wrong type of machine your kernel
184 _will not boot_.
185
186config PPC_EARLY_DEBUG_BOOTX
187 bool "BootX or OpenFirmware"
188 depends on BOOTX_TEXT
189 help
190 Select this to enable early debugging for a machine using BootX
191 or OpenFirmware.
192
193config PPC_EARLY_DEBUG_LPAR
194 bool "LPAR HV Console"
195 depends on PPC_PSERIES && HVC_CONSOLE
196 help
197 Select this to enable early debugging for a machine with a HVC
198 console on vterm 0.
199
200config PPC_EARLY_DEBUG_LPAR_HVSI
201 bool "LPAR HVSI Console"
202 depends on PPC_PSERIES && HVC_CONSOLE
203 help
204 Select this to enable early debugging for a machine with a HVSI
205 console on a specified vterm.
206
207config PPC_EARLY_DEBUG_G5
208 bool "Apple G5"
209 depends on PPC_PMAC64
210 help
211 Select this to enable early debugging for Apple G5 machines.
212
213config PPC_EARLY_DEBUG_RTAS_PANEL
214 bool "RTAS Panel"
215 depends on PPC_RTAS
216 help
217 Select this to enable early debugging via the RTAS panel.
218
219config PPC_EARLY_DEBUG_PAS_REALMODE
220 bool "PA Semi real mode"
221 depends on PPC_PASEMI
222 help
223 Select this to enable early debugging for PA Semi.
224 Output will be on UART0.
225
226config PPC_EARLY_DEBUG_44x
227 bool "Early serial debugging for IBM/AMCC 44x CPUs"
228 depends on 44x
229 help
230 Select this to enable early debugging for IBM 44x chips via the
231 inbuilt serial port. If you enable this, ensure you set
232 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
233
234config PPC_EARLY_DEBUG_CPM
235 bool "Early serial debugging for Freescale CPM-based serial ports"
236 depends on SERIAL_CPM=y
237 help
238 Select this to enable early debugging for Freescale chips
239 using a CPM-based serial port. This assumes that the bootwrapper
240 has run, and set up the CPM in a particular way.
241
242config PPC_EARLY_DEBUG_USBGECKO
243 bool "Early debugging through the USB Gecko adapter"
244 depends on GAMECUBE_COMMON
245 select USBGECKO_UDBG
246 help
247 Select this to enable early debugging for Nintendo GameCube/Wii
248 consoles via an external USB Gecko adapter.
249
250config PPC_EARLY_DEBUG_PS3GELIC
251 bool "Early debugging through the PS3 Ethernet port"
252 depends on PPC_PS3
253 help
254 Select this to enable early debugging for the PlayStation3 via
255 UDP broadcasts sent out through the Ethernet port.
256
257config PPC_EARLY_DEBUG_OPAL_RAW
258 bool "OPAL raw console"
259 depends on HVC_OPAL
260 help
261 Select this to enable early debugging for the PowerNV platform
262 using a "raw" console
263
264config PPC_EARLY_DEBUG_OPAL_HVSI
265 bool "OPAL hvsi console"
266 depends on HVC_OPAL
267 help
268 Select this to enable early debugging for the PowerNV platform
269 using an "hvsi" console
270
271config PPC_EARLY_DEBUG_MEMCONS
272 bool "In memory console"
273 help
274 Select this to enable early debugging using an in memory console.
275 This console provides input and output buffers stored within the
276 kernel BSS and should be safe to select on any system. A debugger
277 can then be used to read kernel output or send input to the console.
278
279config PPC_EARLY_DEBUG_16550
280 bool "Serial 16550"
281 depends on PPC_UDBG_16550
282 help
283 Select this to enable early debugging via Serial 16550 console
284endchoice
285
286config PPC_MEMCONS_OUTPUT_SIZE
287 int "In memory console output buffer size"
288 depends on PPC_EARLY_DEBUG_MEMCONS
289 default 4096
290 help
291 Selects the size of the output buffer (in bytes) of the in memory
292 console.
293
294config PPC_MEMCONS_INPUT_SIZE
295 int "In memory console input buffer size"
296 depends on PPC_EARLY_DEBUG_MEMCONS
297 default 128
298 help
299 Selects the size of the input buffer (in bytes) of the in memory
300 console.
301
302config PPC_EARLY_DEBUG_OPAL
303 def_bool y
304 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
305
306config PPC_EARLY_DEBUG_HVSI_VTERMNO
307 hex "vterm number to use with early debug HVSI"
308 depends on PPC_EARLY_DEBUG_LPAR_HVSI
309 default "0x30000000"
310 help
311 You probably want 0x30000000 for your first serial port and
312 0x30000001 for your second one
313
314config PPC_EARLY_DEBUG_OPAL_VTERMNO
315 hex "vterm number to use with OPAL early debug"
316 depends on PPC_EARLY_DEBUG_OPAL
317 default "0"
318 help
319 This correspond to which /dev/hvcN you want to use for early
320 debug.
321
322 On OPAL v2, this will be 0 for network console and 1 or 2 for
323 the machine built-in serial ports.
324
325config PPC_EARLY_DEBUG_44x_PHYSLOW
326 hex "Low 32 bits of early debug UART physical address"
327 depends on PPC_EARLY_DEBUG_44x
328 default "0x40000200"
329 help
330 You probably want 0x40000200 for ebony boards and
331 0x40000300 for taishan
332
333config PPC_EARLY_DEBUG_44x_PHYSHIGH
334 hex "EPRN of early debug UART physical address"
335 depends on PPC_EARLY_DEBUG_44x
336 default "0x1"
337
338config PPC_EARLY_DEBUG_CPM_ADDR
339 hex "CPM UART early debug transmit descriptor address"
340 depends on PPC_EARLY_DEBUG_CPM
341 default "0xfa202008" if PPC_EP88XC
342 default "0xf0001ff8" if CPM2
343 default "0xff002008" if CPM1
344 help
345 This specifies the address of the transmit descriptor
346 used for early debug output. Because it is needed before
347 platform probing is done, all platforms selected must
348 share the same address.
349
350config PPC_EARLY_DEBUG_16550_PHYSADDR
351 hex "Early debug Serial 16550 physical address"
352 depends on PPC_EARLY_DEBUG_16550
353
354config PPC_EARLY_DEBUG_16550_STRIDE
355 int "Early debug Serial 16550 stride"
356 depends on PPC_EARLY_DEBUG_16550
357 default 1
358
359config FAIL_IOMMU
360 bool "Fault-injection capability for IOMMU"
361 depends on FAULT_INJECTION
362 depends on PCI || IBMVIO
363 help
364 Provide fault-injection capability for IOMMU. Each device can
365 be selectively enabled via the fail_iommu property.
366
367 If you are unsure, say N.
368
369config KASAN_SHADOW_OFFSET
370 hex
371 depends on KASAN
372 default 0xe0000000 if PPC32
373 default 0xa80e000000000000 if PPC_BOOK3S_64
374 default 0xa8001c0000000000 if PPC_BOOK3E_64