1# SPDX-License-Identifier: GPL-2.0
2source "arch/powerpc/platforms/Kconfig.cputype"
3
4config CC_HAS_ELFV2
5	def_bool PPC64 && $(cc-option, -mabi=elfv2)
6
7config CC_HAS_PREFIXED
8	def_bool PPC64 && $(cc-option, -mcpu=power10 -mprefixed)
9
10config CC_HAS_PCREL
11	# Clang has a bug (https://github.com/llvm/llvm-project/issues/62372)
12	# where pcrel code is not generated if -msoft-float, -mno-altivec, or
13	# -mno-vsx options are also given. Without these options, fp/vec
14	# instructions are generated from regular kernel code. So Clang can't
15	# do pcrel yet.
16	def_bool PPC64 && CC_IS_GCC && $(cc-option, -mcpu=power10 -mpcrel)
17
18config 32BIT
19	bool
20	default y if PPC32
21
22config 64BIT
23	bool
24	default y if PPC64
25
26config LIVEPATCH_64
27	def_bool PPC64
28	depends on LIVEPATCH
29
30config MMU
31	bool
32	default y
33
34config ARCH_MMAP_RND_BITS_MAX
35	# On Book3S 64, the default virtual address space for 64-bit processes
36	# is 2^47 (128TB). As a maximum, allow randomisation to consume up to
37	# 32T of address space (2^45), which should ensure a reasonable gap
38	# between bottom-up and top-down allocations for applications that
39	# consume "normal" amounts of address space. Book3S 64 only supports 64K
40	# and 4K page sizes.
41	default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K)
42	default 33 if PPC_BOOK3S_64		     # 33 = 45 (32T) - 12 (4K)
43	#
44	# On all other 64-bit platforms (currently only Book3E), the virtual
45	# address space is 2^46 (64TB). Allow randomisation to consume up to 16T
46	# of address space (2^44). Only 4K page sizes are supported.
47	default 32 if 64BIT	# 32 = 44 (16T) - 12 (4K)
48	#
49	# For 32-bit, use the compat values, as they're the same.
50	default ARCH_MMAP_RND_COMPAT_BITS_MAX
51
52config ARCH_MMAP_RND_BITS_MIN
53	# Allow randomisation to consume up to 1GB of address space (2^30).
54	default 14 if 64BIT && PPC_64K_PAGES	# 14 = 30 (1GB) - 16 (64K)
55	default 18 if 64BIT			# 18 = 30 (1GB) - 12 (4K)
56	#
57	# For 32-bit, use the compat values, as they're the same.
58	default ARCH_MMAP_RND_COMPAT_BITS_MIN
59
60config ARCH_MMAP_RND_COMPAT_BITS_MAX
61	# Total virtual address space for 32-bit processes is 2^31 (2GB).
62	# Allow randomisation to consume up to 512MB of address space (2^29).
63	default 11 if PPC_256K_PAGES	# 11 = 29 (512MB) - 18 (256K)
64	default 13 if PPC_64K_PAGES	# 13 = 29 (512MB) - 16 (64K)
65	default 15 if PPC_16K_PAGES	# 15 = 29 (512MB) - 14 (16K)
66	default 17			# 17 = 29 (512MB) - 12 (4K)
67
68config ARCH_MMAP_RND_COMPAT_BITS_MIN
69	# Total virtual address space for 32-bit processes is 2^31 (2GB).
70	# Allow randomisation to consume up to 8MB of address space (2^23).
71	default 5 if PPC_256K_PAGES	#  5 = 23 (8MB) - 18 (256K)
72	default 7 if PPC_64K_PAGES	#  7 = 23 (8MB) - 16 (64K)
73	default 9 if PPC_16K_PAGES	#  9 = 23 (8MB) - 14 (16K)
74	default 11			# 11 = 23 (8MB) - 12 (4K)
75
76config NR_IRQS
77	int "Number of virtual interrupt numbers"
78	range 32 1048576
79	default "512"
80	help
81	  This defines the number of virtual interrupt numbers the kernel
82	  can manage. Virtual interrupt numbers are what you see in
83	  /proc/interrupts. If you configure your system to have too few,
84	  drivers will fail to load or worse - handle with care.
85
86config NMI_IPI
87	bool
88	depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR)
89	default y
90
91config PPC_WATCHDOG
92	bool
93	depends on HARDLOCKUP_DETECTOR_ARCH
94	default y
95	help
96	  This is a placeholder when the powerpc hardlockup detector
97	  watchdog is selected (arch/powerpc/kernel/watchdog.c). It is
98	  selected via the generic lockup detector menu which is why we
99	  have no standalone config option for it here.
100
101config STACKTRACE_SUPPORT
102	bool
103	default y
104
105config LOCKDEP_SUPPORT
106	bool
107	default y
108
109config GENERIC_LOCKBREAK
110	bool
111	default y
112	depends on SMP && PREEMPTION && !PPC_QUEUED_SPINLOCKS
113
114config GENERIC_HWEIGHT
115	bool
116	default y
117
118config PPC
119	bool
120	default y
121	#
122	# Please keep this list sorted alphabetically.
123	#
124	select ARCH_32BIT_OFF_T if PPC32
125	select ARCH_DISABLE_KASAN_INLINE	if PPC_RADIX_MMU
126	select ARCH_DMA_DEFAULT_COHERENT	if !NOT_COHERENT_CACHE
127	select ARCH_ENABLE_MEMORY_HOTPLUG
128	select ARCH_ENABLE_MEMORY_HOTREMOVE
129	select ARCH_HAS_COPY_MC			if PPC64
130	select ARCH_HAS_CURRENT_STACK_POINTER
131	select ARCH_HAS_DEBUG_VIRTUAL
132	select ARCH_HAS_DEBUG_VM_PGTABLE
133	select ARCH_HAS_DEBUG_WX		if STRICT_KERNEL_RWX
134	select ARCH_HAS_DEVMEM_IS_ALLOWED
135	select ARCH_HAS_DMA_MAP_DIRECT 		if PPC_PSERIES
136	select ARCH_HAS_FORTIFY_SOURCE
137	select ARCH_HAS_GCOV_PROFILE_ALL
138	select ARCH_HAS_HUGEPD			if HUGETLB_PAGE
139	select ARCH_HAS_KCOV
140	select ARCH_HAS_MEMBARRIER_CALLBACKS
141	select ARCH_HAS_MEMBARRIER_SYNC_CORE
142	select ARCH_HAS_MEMREMAP_COMPAT_ALIGN	if PPC_64S_HASH_MMU
143	select ARCH_HAS_MMIOWB			if PPC64
144	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
145	select ARCH_HAS_PHYS_TO_DMA
146	select ARCH_HAS_PMEM_API
147	select ARCH_HAS_PTE_DEVMAP		if PPC_BOOK3S_64
148	select ARCH_HAS_PTE_SPECIAL
149	select ARCH_HAS_SCALED_CPUTIME		if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
150	select ARCH_HAS_SET_MEMORY
151	select ARCH_HAS_STRICT_KERNEL_RWX	if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION
152	select ARCH_HAS_STRICT_KERNEL_RWX	if PPC_85xx && !HIBERNATION && !RANDOMIZE_BASE
153	select ARCH_HAS_STRICT_MODULE_RWX	if ARCH_HAS_STRICT_KERNEL_RWX
154	select ARCH_HAS_SYSCALL_WRAPPER		if !SPU_BASE && !COMPAT
155	select ARCH_HAS_TICK_BROADCAST		if GENERIC_CLOCKEVENTS_BROADCAST
156	select ARCH_HAS_UACCESS_FLUSHCACHE
157	select ARCH_HAS_UBSAN_SANITIZE_ALL
158	select ARCH_HAVE_NMI_SAFE_CMPXCHG
159	select ARCH_KEEP_MEMBLOCK
160	select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE	if PPC_RADIX_MMU
161	select ARCH_MIGHT_HAVE_PC_PARPORT
162	select ARCH_MIGHT_HAVE_PC_SERIO
163	select ARCH_OPTIONAL_KERNEL_RWX		if ARCH_HAS_STRICT_KERNEL_RWX
164	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
165	select ARCH_SPLIT_ARG64			if PPC32
166	select ARCH_STACKWALK
167	select ARCH_SUPPORTS_ATOMIC_RMW
168	select ARCH_SUPPORTS_DEBUG_PAGEALLOC	if PPC_BOOK3S || PPC_8xx || 40x
169	select ARCH_USE_BUILTIN_BSWAP
170	select ARCH_USE_CMPXCHG_LOCKREF		if PPC64
171	select ARCH_USE_MEMTEST
172	select ARCH_USE_QUEUED_RWLOCKS		if PPC_QUEUED_SPINLOCKS
173	select ARCH_WANT_DEFAULT_BPF_JIT
174	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
175	select ARCH_WANT_IPC_PARSE_VERSION
176	select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
177	select ARCH_WANT_LD_ORPHAN_WARN
178	select ARCH_WANT_OPTIMIZE_DAX_VMEMMAP	if PPC_RADIX_MMU
179	select ARCH_WANTS_MODULES_DATA_IN_VMALLOC	if PPC_BOOK3S_32 || PPC_8xx
180	select ARCH_WEAK_RELEASE_ACQUIRE
181	select BINFMT_ELF
182	select BUILDTIME_TABLE_SORT
183	select CLONE_BACKWARDS
184	select CPUMASK_OFFSTACK			if NR_CPUS >= 8192
185	select DCACHE_WORD_ACCESS		if PPC64 && CPU_LITTLE_ENDIAN
186	select DMA_OPS_BYPASS			if PPC64
187	select DMA_OPS				if PPC64
188	select DYNAMIC_FTRACE			if FUNCTION_TRACER
189	select EDAC_ATOMIC_SCRUB
190	select EDAC_SUPPORT
191	select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if ARCH_USING_PATCHABLE_FUNCTION_ENTRY
192	select GENERIC_ATOMIC64			if PPC32
193	select GENERIC_CLOCKEVENTS_BROADCAST	if SMP
194	select GENERIC_CMOS_UPDATE
195	select GENERIC_CPU_AUTOPROBE
196	select GENERIC_CPU_VULNERABILITIES	if PPC_BARRIER_NOSPEC
197	select GENERIC_EARLY_IOREMAP
198	select GENERIC_GETTIMEOFDAY
199	select GENERIC_IDLE_POLL_SETUP
200	select GENERIC_IOREMAP
201	select GENERIC_IRQ_SHOW
202	select GENERIC_IRQ_SHOW_LEVEL
203	select GENERIC_PCI_IOMAP		if PCI
204	select GENERIC_PTDUMP
205	select GENERIC_SMP_IDLE_THREAD
206	select GENERIC_TIME_VSYSCALL
207	select GENERIC_VDSO_TIME_NS
208	select HAS_IOPORT			if PCI
209	select HAVE_ARCH_AUDITSYSCALL
210	select HAVE_ARCH_HUGE_VMALLOC		if HAVE_ARCH_HUGE_VMAP
211	select HAVE_ARCH_HUGE_VMAP		if PPC_RADIX_MMU || PPC_8xx
212	select HAVE_ARCH_JUMP_LABEL
213	select HAVE_ARCH_JUMP_LABEL_RELATIVE
214	select HAVE_ARCH_KASAN			if PPC32 && PPC_PAGE_SHIFT <= 14
215	select HAVE_ARCH_KASAN			if PPC_RADIX_MMU
216	select HAVE_ARCH_KASAN			if PPC_BOOK3E_64
217	select HAVE_ARCH_KASAN_VMALLOC		if HAVE_ARCH_KASAN
218	select HAVE_ARCH_KCSAN
219	select HAVE_ARCH_KFENCE			if ARCH_SUPPORTS_DEBUG_PAGEALLOC
220	select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
221	select HAVE_ARCH_WITHIN_STACK_FRAMES
222	select HAVE_ARCH_KGDB
223	select HAVE_ARCH_MMAP_RND_BITS
224	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if COMPAT
225	select HAVE_ARCH_NVRAM_OPS
226	select HAVE_ARCH_SECCOMP_FILTER
227	select HAVE_ARCH_TRACEHOOK
228	select HAVE_ASM_MODVERSIONS
229	select HAVE_CONTEXT_TRACKING_USER
230	select HAVE_C_RECORDMCOUNT
231	select HAVE_DEBUG_KMEMLEAK
232	select HAVE_DEBUG_STACKOVERFLOW
233	select HAVE_DYNAMIC_FTRACE
234	select HAVE_DYNAMIC_FTRACE_WITH_ARGS	if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32
235	select HAVE_DYNAMIC_FTRACE_WITH_REGS	if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32
236	select HAVE_EBPF_JIT
237	select HAVE_EFFICIENT_UNALIGNED_ACCESS
238	select HAVE_FAST_GUP
239	select HAVE_FTRACE_MCOUNT_RECORD
240	select HAVE_FUNCTION_DESCRIPTORS	if PPC64_ELF_ABI_V1
241	select HAVE_FUNCTION_ERROR_INJECTION
242	select HAVE_FUNCTION_GRAPH_TRACER
243	select HAVE_FUNCTION_TRACER		if PPC64 || (PPC32 && CC_IS_GCC)
244	select HAVE_GCC_PLUGINS			if GCC_VERSION >= 50200   # plugin support on gcc <= 5.1 is buggy on PPC
245	select HAVE_GENERIC_VDSO
246	select HAVE_HARDLOCKUP_DETECTOR_ARCH	if PPC_BOOK3S_64 && SMP
247	select HAVE_HARDLOCKUP_DETECTOR_PERF	if PERF_EVENTS && HAVE_PERF_EVENTS_NMI
248	select HAVE_HW_BREAKPOINT		if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
249	select HAVE_IOREMAP_PROT
250	select HAVE_IRQ_TIME_ACCOUNTING
251	select HAVE_KERNEL_GZIP
252	select HAVE_KERNEL_LZMA			if DEFAULT_UIMAGE
253	select HAVE_KERNEL_LZO			if DEFAULT_UIMAGE
254	select HAVE_KERNEL_XZ			if PPC_BOOK3S || 44x
255	select HAVE_KPROBES
256	select HAVE_KPROBES_ON_FTRACE
257	select HAVE_KRETPROBES
258	select HAVE_LD_DEAD_CODE_DATA_ELIMINATION if HAVE_OBJTOOL_MCOUNT && (!ARCH_USING_PATCHABLE_FUNCTION_ENTRY || (!CC_IS_GCC || GCC_VERSION >= 110100))
259	select HAVE_LIVEPATCH			if HAVE_DYNAMIC_FTRACE_WITH_REGS
260	select HAVE_MOD_ARCH_SPECIFIC
261	select HAVE_NMI				if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
262	select HAVE_OPTPROBES
263	select HAVE_OBJTOOL			if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32
264	select HAVE_OBJTOOL_MCOUNT		if HAVE_OBJTOOL
265	select HAVE_PERF_EVENTS
266	select HAVE_PERF_EVENTS_NMI		if PPC64
267	select HAVE_PERF_REGS
268	select HAVE_PERF_USER_STACK_DUMP
269	select HAVE_REGS_AND_STACK_ACCESS_API
270	select HAVE_RELIABLE_STACKTRACE
271	select HAVE_RSEQ
272	select HAVE_SETUP_PER_CPU_AREA		if PPC64
273	select HAVE_SOFTIRQ_ON_OWN_STACK
274	select HAVE_STACKPROTECTOR		if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
275	select HAVE_STACKPROTECTOR		if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
276	select HAVE_STATIC_CALL			if PPC32
277	select HAVE_SYSCALL_TRACEPOINTS
278	select HAVE_VIRT_CPU_ACCOUNTING
279	select HAVE_VIRT_CPU_ACCOUNTING_GEN
280	select HOTPLUG_SMT			if HOTPLUG_CPU
281	select SMT_NUM_THREADS_DYNAMIC
282	select HUGETLB_PAGE_SIZE_VARIABLE	if PPC_BOOK3S_64 && HUGETLB_PAGE
283	select IOMMU_HELPER			if PPC64
284	select IRQ_DOMAIN
285	select IRQ_FORCED_THREADING
286	select KASAN_VMALLOC			if KASAN && MODULES
287	select LOCK_MM_AND_FIND_VMA
288	select MMU_GATHER_PAGE_SIZE
289	select MMU_GATHER_RCU_TABLE_FREE
290	select MMU_GATHER_MERGE_VMAS
291	select MMU_LAZY_TLB_SHOOTDOWN		if PPC_BOOK3S_64
292	select MODULES_USE_ELF_RELA
293	select NEED_DMA_MAP_STATE		if PPC64 || NOT_COHERENT_CACHE
294	select NEED_PER_CPU_EMBED_FIRST_CHUNK	if PPC64
295	select NEED_PER_CPU_PAGE_FIRST_CHUNK	if PPC64
296	select NEED_SG_DMA_LENGTH
297	select OF
298	select OF_EARLY_FLATTREE
299	select OLD_SIGACTION			if PPC32
300	select OLD_SIGSUSPEND
301	select PCI_DOMAINS			if PCI
302	select PCI_MSI_ARCH_FALLBACKS		if PCI_MSI
303	select PCI_SYSCALL			if PCI
304	select PPC_DAWR				if PPC64
305	select RTC_LIB
306	select SPARSE_IRQ
307	select STRICT_KERNEL_RWX if STRICT_MODULE_RWX
308	select SYSCTL_EXCEPTION_TRACE
309	select THREAD_INFO_IN_TASK
310	select TRACE_IRQFLAGS_SUPPORT
311	#
312	# Please keep this list sorted alphabetically.
313	#
314
315config PPC_BARRIER_NOSPEC
316	bool
317	default y
318	depends on PPC_BOOK3S_64 || PPC_E500
319
320config PPC_HAS_LBARX_LHARX
321	bool
322
323config EARLY_PRINTK
324	bool
325	default y
326
327config PANIC_TIMEOUT
328	int
329	default 180
330
331config COMPAT
332	bool "Enable support for 32bit binaries"
333	depends on PPC64
334	depends on !CC_IS_CLANG || CLANG_VERSION >= 120000
335	default y if !CPU_LITTLE_ENDIAN
336	select ARCH_WANT_OLD_COMPAT_IPC
337	select COMPAT_OLD_SIGACTION
338
339config SCHED_OMIT_FRAME_POINTER
340	bool
341	default y
342
343config ARCH_MAY_HAVE_PC_FDC
344	bool
345	default PCI
346
347config PPC_UDBG_16550
348	bool
349
350config GENERIC_TBSYNC
351	bool
352	default y if PPC32 && SMP
353
354config AUDIT_ARCH
355	bool
356	default y
357
358config GENERIC_BUG
359	bool
360	default y
361	depends on BUG
362
363config GENERIC_BUG_RELATIVE_POINTERS
364	def_bool y
365	depends on GENERIC_BUG
366
367config SYS_SUPPORTS_APM_EMULATION
368	default y if PMAC_APM_EMU
369	bool
370
371config EPAPR_BOOT
372	bool
373	help
374	  Used to allow a board to specify it wants an ePAPR compliant wrapper.
375
376config DEFAULT_UIMAGE
377	bool
378	help
379	  Used to allow a board to specify it wants a uImage built by default
380
381config ARCH_HIBERNATION_POSSIBLE
382	bool
383	default y
384
385config ARCH_SUSPEND_POSSIBLE
386	def_bool y
387	depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
388		   (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
389		   || 44x || 40x
390
391config ARCH_SUSPEND_NONZERO_CPU
392	def_bool y
393	depends on PPC_POWERNV || PPC_PSERIES
394
395config ARCH_HAS_ADD_PAGES
396	def_bool y
397	depends on ARCH_ENABLE_MEMORY_HOTPLUG
398
399config PPC_DCR_NATIVE
400	bool
401
402config PPC_DCR_MMIO
403	bool
404
405config PPC_DCR
406	bool
407	depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
408	default y
409
410config PPC_PCI_OF_BUS_MAP
411	bool "Use pci_to_OF_bus_map (deprecated)"
412	depends on PPC32
413	depends on PPC_PMAC || PPC_CHRP
414	help
415	  This option uses pci_to_OF_bus_map to map OF nodes to PCI devices, which
416	  restricts the system to only having 256 PCI buses. On CHRP it also causes
417	  the "pci-OF-bus-map" property to be created in the device tree.
418
419	  If unsure, say "N".
420
421config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
422	depends on PPC32
423	depends on !PPC_PCI_OF_BUS_MAP
424	bool "Assign PCI bus numbers from zero individually for each PCI domain"
425	default y
426	help
427	  By default on PPC32 were PCI bus numbers unique across all PCI domains.
428	  So system could have only 256 PCI buses independently of available
429	  PCI domains. When this option is enabled then PCI bus numbers are
430	  PCI domain dependent and each PCI controller on own domain can have
431	  256 PCI buses, like it is on other Linux architectures.
432
433config PPC_OF_PLATFORM_PCI
434	bool
435	depends on PCI
436	depends on PPC64 # not supported on 32 bits yet
437
438config ARCH_SUPPORTS_UPROBES
439	def_bool y
440
441config PPC_ADV_DEBUG_REGS
442	bool
443	depends on 40x || BOOKE
444	default y
445
446config PPC_ADV_DEBUG_IACS
447	int
448	depends on PPC_ADV_DEBUG_REGS
449	default 4 if 44x
450	default 2
451
452config PPC_ADV_DEBUG_DACS
453	int
454	depends on PPC_ADV_DEBUG_REGS
455	default 2
456
457config PPC_ADV_DEBUG_DVCS
458	int
459	depends on PPC_ADV_DEBUG_REGS
460	default 2 if 44x
461	default 0
462
463config PPC_ADV_DEBUG_DAC_RANGE
464	bool
465	depends on PPC_ADV_DEBUG_REGS && 44x
466	default y
467
468config PPC_DAWR
469	bool
470
471config PGTABLE_LEVELS
472	int
473	default 2 if !PPC64
474	default 4
475
476source "arch/powerpc/sysdev/Kconfig"
477source "arch/powerpc/platforms/Kconfig"
478
479menu "Kernel options"
480
481config HIGHMEM
482	bool "High memory support"
483	depends on PPC32
484	select KMAP_LOCAL
485
486source "kernel/Kconfig.hz"
487
488config MATH_EMULATION
489	bool "Math emulation"
490	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
491	select PPC_FPU_REGS
492	help
493	  Some PowerPC chips designed for embedded applications do not have
494	  a floating-point unit and therefore do not implement the
495	  floating-point instructions in the PowerPC instruction set.  If you
496	  say Y here, the kernel will include code to emulate a floating-point
497	  unit, which will allow programs that use floating-point
498	  instructions to run.
499
500	  This is also useful to emulate missing (optional) instructions
501	  such as fsqrt on cores that do have an FPU but do not implement
502	  them (such as Freescale BookE).
503
504choice
505	prompt "Math emulation options"
506	default MATH_EMULATION_FULL
507	depends on MATH_EMULATION
508
509config MATH_EMULATION_FULL
510	bool "Emulate all the floating point instructions"
511	help
512	  Select this option will enable the kernel to support to emulate
513	  all the floating point instructions. If your SoC doesn't have
514	  a FPU, you should select this.
515
516config MATH_EMULATION_HW_UNIMPLEMENTED
517	bool "Just emulate the FPU unimplemented instructions"
518	help
519	  Select this if you know there does have a hardware FPU on your
520	  SoC, but some floating point instructions are not implemented by that.
521
522endchoice
523
524config PPC_TRANSACTIONAL_MEM
525	bool "Transactional Memory support for POWERPC"
526	depends on PPC_BOOK3S_64
527	depends on SMP
528	select ALTIVEC
529	select VSX
530	help
531	  Support user-mode Transactional Memory on POWERPC.
532
533config PPC_UV
534	bool "Ultravisor support"
535	depends on KVM_BOOK3S_HV_POSSIBLE
536	depends on DEVICE_PRIVATE
537	default n
538	help
539	  This option paravirtualizes the kernel to run in POWER platforms that
540	  supports the Protected Execution Facility (PEF). On such platforms,
541	  the ultravisor firmware runs at a privilege level above the
542	  hypervisor.
543
544	  If unsure, say "N".
545
546config LD_HEAD_STUB_CATCH
547	bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
548	depends on PPC64
549	help
550	  Very large kernels can cause linker branch stubs to be generated by
551	  code in head_64.S, which moves the head text sections out of their
552	  specified location. This option can work around the problem.
553
554	  If unsure, say "N".
555
556config MPROFILE_KERNEL
557	depends on PPC64_ELF_ABI_V2 && FUNCTION_TRACER
558	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -mlittle-endian) if CPU_LITTLE_ENDIAN
559	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -mbig-endian) if CPU_BIG_ENDIAN
560
561config ARCH_USING_PATCHABLE_FUNCTION_ENTRY
562	depends on FUNCTION_TRACER && (PPC32 || PPC64_ELF_ABI_V2)
563	depends on $(cc-option,-fpatchable-function-entry=2)
564	def_bool y if PPC32
565	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh $(CC) -mlittle-endian) if PPC64 && CPU_LITTLE_ENDIAN
566	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh $(CC) -mbig-endian) if PPC64 && CPU_BIG_ENDIAN
567
568config HOTPLUG_CPU
569	bool "Support for enabling/disabling CPUs"
570	depends on SMP && (PPC_PSERIES || \
571		PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
572	help
573	  Say Y here to be able to disable and re-enable individual
574	  CPUs at runtime on SMP machines.
575
576	  Say N if you are unsure.
577
578config INTERRUPT_SANITIZE_REGISTERS
579	bool "Clear gprs on interrupt arrival"
580	depends on PPC64 && ARCH_HAS_SYSCALL_WRAPPER
581	default PPC_BOOK3E_64 || PPC_PSERIES || PPC_POWERNV
582	help
583	  Reduce the influence of user register state on interrupt handlers and
584	  syscalls through clearing user state from registers before handling
585	  the exception.
586
587config PPC_QUEUED_SPINLOCKS
588	bool "Queued spinlocks" if EXPERT
589	depends on SMP
590	default PPC_BOOK3S_64
591	help
592	  Say Y here to use queued spinlocks which give better scalability and
593	  fairness on large SMP and NUMA systems without harming single threaded
594	  performance.
595
596config ARCH_CPU_PROBE_RELEASE
597	def_bool y
598	depends on HOTPLUG_CPU
599
600config PPC64_SUPPORTS_MEMORY_FAILURE
601	bool "Add support for memory hwpoison"
602	depends on PPC_BOOK3S_64
603	default "y" if PPC_POWERNV
604	select ARCH_SUPPORTS_MEMORY_FAILURE
605
606config ARCH_SUPPORTS_KEXEC
607	def_bool PPC_BOOK3S || PPC_E500 || (44x && !SMP)
608
609config ARCH_SUPPORTS_KEXEC_FILE
610	def_bool PPC64
611
612config ARCH_SUPPORTS_KEXEC_PURGATORY
613	def_bool y
614
615config ARCH_SELECTS_KEXEC_FILE
616	def_bool y
617	depends on KEXEC_FILE
618	select KEXEC_ELF
619	select HAVE_IMA_KEXEC if IMA
620
621config PPC64_BIG_ENDIAN_ELF_ABI_V2
622	# Option is available to BFD, but LLD does not support ELFv1 so this is
623	# always true there.
624	prompt "Build big-endian kernel using ELF ABI V2" if LD_IS_BFD && EXPERT
625	def_bool y
626	depends on PPC64 && CPU_BIG_ENDIAN
627	depends on CC_HAS_ELFV2
628	help
629	  This builds the kernel image using the "Power Architecture 64-Bit ELF
630	  V2 ABI Specification", which has a reduced stack overhead and faster
631	  function calls. This internal kernel ABI option does not affect
632          userspace compatibility.
633
634	  The V2 ABI is standard for 64-bit little-endian, but for big-endian
635	  it is less well tested by kernel and toolchain. However some distros
636	  build userspace this way, and it can produce a functioning kernel.
637
638config RELOCATABLE
639	bool "Build a relocatable kernel"
640	depends on PPC64 || (FLATMEM && (44x || PPC_85xx))
641	select NONSTATIC_KERNEL
642	help
643	  This builds a kernel image that is capable of running at the
644	  location the kernel is loaded at. For ppc32, there is no any
645	  alignment restrictions, and this feature is a superset of
646	  DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
647	  16k-aligned base address. The kernel is linked as a
648	  position-independent executable (PIE) and contains dynamic relocations
649	  which are processed early in the bootup process.
650
651	  One use is for the kexec on panic case where the recovery kernel
652	  must live at a different physical address than the primary
653	  kernel.
654
655	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
656	  it has been loaded at and the compile time physical addresses
657	  CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
658	  setting can still be useful to bootwrappers that need to know the
659	  load address of the kernel (eg. u-boot/mkimage).
660
661config RANDOMIZE_BASE
662	bool "Randomize the address of the kernel image"
663	depends on PPC_85xx && FLATMEM
664	depends on RELOCATABLE
665	help
666	  Randomizes the virtual address at which the kernel image is
667	  loaded, as a security feature that deters exploit attempts
668	  relying on knowledge of the location of kernel internals.
669
670	  If unsure, say Y.
671
672config RELOCATABLE_TEST
673	bool "Test relocatable kernel"
674	depends on (PPC64 && RELOCATABLE)
675	help
676	  This runs the relocatable kernel at the address it was initially
677	  loaded at, which tends to be non-zero and therefore test the
678	  relocation code.
679
680config ARCH_SUPPORTS_CRASH_DUMP
681	def_bool PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)
682
683config ARCH_SELECTS_CRASH_DUMP
684	def_bool y
685	depends on CRASH_DUMP
686	select RELOCATABLE if PPC64 || 44x || PPC_85xx
687
688config FA_DUMP
689	bool "Firmware-assisted dump"
690	depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
691	select CRASH_CORE
692	select CRASH_DUMP
693	help
694	  A robust mechanism to get reliable kernel crash dump with
695	  assistance from firmware. This approach does not use kexec,
696	  instead firmware assists in booting the capture kernel
697	  while preserving memory contents. Firmware-assisted dump
698	  is meant to be a kdump replacement offering robustness and
699	  speed not possible without system firmware assistance.
700
701	  If unsure, say "y". Only special kernels like petitboot may
702	  need to say "N" here.
703
704config PRESERVE_FA_DUMP
705	bool "Preserve Firmware-assisted dump"
706	depends on PPC64 && PPC_POWERNV && !FA_DUMP
707	help
708	  On a kernel with FA_DUMP disabled, this option helps to preserve
709	  crash data from a previously crash'ed kernel. Useful when the next
710	  memory preserving kernel boot would process this crash data.
711	  Petitboot kernel is the typical usecase for this option.
712
713config OPAL_CORE
714	bool "Export OPAL memory as /sys/firmware/opal/core"
715	depends on PPC64 && PPC_POWERNV
716	help
717	  This option uses the MPIPL support in firmware to provide an
718	  ELF core of OPAL memory after a crash. The ELF core is exported
719	  as /sys/firmware/opal/core file which is helpful in debugging
720	  OPAL crashes using GDB.
721
722config IRQ_ALL_CPUS
723	bool "Distribute interrupts on all CPUs by default"
724	depends on SMP
725	help
726	  This option gives the kernel permission to distribute IRQs across
727	  multiple CPUs.  Saying N here will route all IRQs to the first
728	  CPU.  Generally saying Y is safe, although some problems have been
729	  reported with SMP Power Macintoshes with this option enabled.
730
731config NUMA
732	bool "NUMA Memory Allocation and Scheduler Support"
733	depends on PPC64 && SMP
734	default y if PPC_PSERIES || PPC_POWERNV
735	select USE_PERCPU_NUMA_NODE_ID
736	help
737	  Enable NUMA (Non-Uniform Memory Access) support.
738
739	  The kernel will try to allocate memory used by a CPU on the
740	  local memory controller of the CPU and add some more
741	  NUMA awareness to the kernel.
742
743config NODES_SHIFT
744	int
745	default "8" if PPC64
746	default "4"
747	depends on NUMA
748
749config HAVE_MEMORYLESS_NODES
750	def_bool y
751	depends on NUMA
752
753config ARCH_SELECT_MEMORY_MODEL
754	def_bool y
755	depends on PPC64
756
757config ARCH_FLATMEM_ENABLE
758	def_bool y
759	depends on (PPC64 && !NUMA) || PPC32
760
761config ARCH_SPARSEMEM_ENABLE
762	def_bool y
763	depends on PPC64
764	select SPARSEMEM_VMEMMAP_ENABLE
765
766config ARCH_SPARSEMEM_DEFAULT
767	def_bool y
768	depends on PPC_BOOK3S_64
769
770config ILLEGAL_POINTER_VALUE
771	hex
772	# This is roughly half way between the top of user space and the bottom
773	# of kernel space, which seems about as good as we can get.
774	default 0x5deadbeef0000000 if PPC64
775	default 0
776
777config ARCH_MEMORY_PROBE
778	def_bool y
779	depends on MEMORY_HOTPLUG
780
781choice
782	prompt "Page size"
783	default PPC_64K_PAGES if PPC_BOOK3S_64
784	default PPC_4K_PAGES
785	help
786	  Select the kernel logical page size. Increasing the page size
787	  will reduce software overhead at each page boundary, allow
788	  hardware prefetch mechanisms to be more effective, and allow
789	  larger dma transfers increasing IO efficiency and reducing
790	  overhead. However the utilization of memory will increase.
791	  For example, each cached file will using a multiple of the
792	  page size to hold its contents and the difference between the
793	  end of file and the end of page is wasted.
794
795	  Some dedicated systems, such as software raid serving with
796	  accelerated calculations, have shown significant increases.
797
798	  If you configure a 64 bit kernel for 64k pages but the
799	  processor does not support them, then the kernel will simulate
800	  them with 4k pages, loading them on demand, but with the
801	  reduced software overhead and larger internal fragmentation.
802	  For the 32 bit kernel, a large page option will not be offered
803	  unless it is supported by the configured processor.
804
805	  If unsure, choose 4K_PAGES.
806
807config PPC_4K_PAGES
808	bool "4k page size"
809	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
810
811config PPC_16K_PAGES
812	bool "16k page size"
813	depends on 44x || PPC_8xx
814
815config PPC_64K_PAGES
816	bool "64k page size"
817	depends on 44x || PPC_BOOK3S_64
818	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
819
820config PPC_256K_PAGES
821	bool "256k page size (Requires non-standard binutils settings)"
822	depends on 44x && !PPC_47x
823	help
824	  Make the page size 256k.
825
826	  The kernel will only be able to run applications that have been
827	  compiled with '-zmax-page-size' set to 256K (the default is 64K) using
828	  binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE
829	  definition from 0x10000 to 0x40000 in older versions.
830
831endchoice
832
833config PAGE_SIZE_4KB
834	def_bool y
835	depends on PPC_4K_PAGES
836
837config PAGE_SIZE_16KB
838	def_bool y
839	depends on PPC_16K_PAGES
840
841config PAGE_SIZE_64KB
842	def_bool y
843	depends on PPC_64K_PAGES
844
845config PAGE_SIZE_256KB
846	def_bool y
847	depends on PPC_256K_PAGES
848
849config PPC_PAGE_SHIFT
850	int
851	default 18 if PPC_256K_PAGES
852	default 16 if PPC_64K_PAGES
853	default 14 if PPC_16K_PAGES
854	default 12
855
856config THREAD_SHIFT
857	int "Thread shift" if EXPERT
858	range 13 15
859	default "15" if PPC_256K_PAGES
860	default "15" if PPC_PSERIES || PPC_POWERNV
861	default "14" if PPC64
862	default "13"
863	help
864	  Used to define the stack size. The default is almost always what you
865	  want. Only change this if you know what you are doing.
866
867config DATA_SHIFT_BOOL
868	bool "Set custom data alignment"
869	depends on ADVANCED_OPTIONS
870	depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE
871	depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \
872		   PPC_85xx
873	help
874	  This option allows you to set the kernel data alignment. When
875	  RAM is mapped by blocks, the alignment needs to fit the size and
876	  number of possible blocks. The default should be OK for most configs.
877
878	  Say N here unless you know what you are doing.
879
880config DATA_SHIFT
881	int "Data shift" if DATA_SHIFT_BOOL
882	default 24 if STRICT_KERNEL_RWX && PPC64
883	range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
884	range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
885	range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_85xx
886	default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
887	default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
888	default 23 if STRICT_KERNEL_RWX && PPC_8xx
889	default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA
890	default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
891	default 24 if STRICT_KERNEL_RWX && PPC_85xx
892	default PPC_PAGE_SHIFT
893	help
894	  On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO.
895	  Smaller is the alignment, greater is the number of necessary DBATs.
896
897	  On 8xx, large pages (512kb or 8M) are used to map kernel linear
898	  memory. Aligning to 8M reduces TLB misses as only 8M pages are used
899	  in that case. If PIN_TLB is selected, it must be aligned to 8M as
900	  8M pages will be pinned.
901
902config ARCH_FORCE_MAX_ORDER
903	int "Order of maximal physically contiguous allocations"
904	range 7 8 if PPC64 && PPC_64K_PAGES
905	default "8" if PPC64 && PPC_64K_PAGES
906	range 12 12 if PPC64 && !PPC_64K_PAGES
907	default "12" if PPC64 && !PPC_64K_PAGES
908	range 8 10 if PPC32 && PPC_16K_PAGES
909	default "8" if PPC32 && PPC_16K_PAGES
910	range 6 10 if PPC32 && PPC_64K_PAGES
911	default "6" if PPC32 && PPC_64K_PAGES
912	range 4 10 if PPC32 && PPC_256K_PAGES
913	default "4" if PPC32 && PPC_256K_PAGES
914	range 10 12
915	default "10"
916	help
917	  The kernel page allocator limits the size of maximal physically
918	  contiguous allocations. The limit is called MAX_ORDER and it
919	  defines the maximal power of two of number of pages that can be
920	  allocated as a single contiguous block. This option allows
921	  overriding the default setting when ability to allocate very
922	  large blocks of physically contiguous memory is required.
923
924	  The page size is not necessarily 4KB.  For example, on 64-bit
925	  systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
926	  this in mind when choosing a value for this option.
927
928	  Don't change if unsure.
929
930config PPC_SUBPAGE_PROT
931	bool "Support setting protections for 4k subpages (subpage_prot syscall)"
932	default n
933	depends on PPC_64S_HASH_MMU && PPC_64K_PAGES
934	help
935	  This option adds support for system call to allow user programs
936	  to set access permissions (read/write, readonly, or no access)
937	  on the 4k subpages of each 64k page.
938
939	  If unsure, say N here.
940
941config PPC_PROT_SAO_LPAR
942	bool "Support PROT_SAO mappings in LPARs"
943	depends on PPC_BOOK3S_64
944	help
945	  This option adds support for PROT_SAO mappings from userspace
946	  inside LPARs on supported CPUs.
947
948	  This may cause issues when performing guest migration from
949	  a CPU that supports SAO to one that does not.
950
951	  If unsure, say N here.
952
953config PPC_COPRO_BASE
954	bool
955
956config SCHED_SMT
957	bool "SMT (Hyperthreading) scheduler support"
958	depends on PPC64 && SMP
959	help
960	  SMT scheduler support improves the CPU scheduler's decision making
961	  when dealing with POWER5 cpus at a cost of slightly increased
962	  overhead in some places. If unsure say N here.
963
964config PPC_DENORMALISATION
965	bool "PowerPC denormalisation exception handling"
966	depends on PPC_BOOK3S_64
967	default "y" if PPC_POWERNV
968	help
969	  Add support for handling denormalisation of single precision
970	  values.  Useful for bare metal only.  If unsure say Y here.
971
972config CMDLINE
973	string "Initial kernel command string"
974	default ""
975	help
976	  On some platforms, there is currently no way for the boot loader to
977	  pass arguments to the kernel. For these platforms, you can supply
978	  some command-line options at build time by entering them here.  In
979	  most cases you will need to specify the root device here.
980
981choice
982	prompt "Kernel command line type" if CMDLINE != ""
983	default CMDLINE_FROM_BOOTLOADER
984
985config CMDLINE_FROM_BOOTLOADER
986	bool "Use bootloader kernel arguments if available"
987	help
988	  Uses the command-line options passed by the boot loader. If
989	  the boot loader doesn't provide any, the default kernel command
990	  string provided in CMDLINE will be used.
991
992config CMDLINE_EXTEND
993	bool "Extend bootloader kernel arguments"
994	help
995	  The command-line arguments provided by the boot loader will be
996	  appended to the default kernel command string.
997
998config CMDLINE_FORCE
999	bool "Always use the default kernel command string"
1000	help
1001	  Always use the default kernel command string, even if the boot
1002	  loader passes other arguments to the kernel.
1003	  This is useful if you cannot or don't want to change the
1004	  command-line options your boot loader passes to the kernel.
1005
1006endchoice
1007
1008config EXTRA_TARGETS
1009	string "Additional default image types"
1010	help
1011	  List additional targets to be built by the bootwrapper here (separated
1012	  by spaces).  This is useful for targets that depend of device tree
1013	  files in the .dts directory.
1014
1015	  Targets in this list will be build as part of the default build
1016	  target, or when the user does a 'make zImage' or a
1017	  'make zImage.initrd'.
1018
1019	  If unsure, leave blank
1020
1021config ARCH_WANTS_FREEZER_CONTROL
1022	def_bool y
1023	depends on ADB_PMU
1024
1025source "kernel/power/Kconfig"
1026
1027config PPC_MEM_KEYS
1028	prompt "PowerPC Memory Protection Keys"
1029	def_bool y
1030	depends on PPC_BOOK3S_64
1031	depends on PPC_64S_HASH_MMU
1032	select ARCH_USES_HIGH_VMA_FLAGS
1033	select ARCH_HAS_PKEYS
1034	help
1035	  Memory Protection Keys provides a mechanism for enforcing
1036	  page-based protections, but without requiring modification of the
1037	  page tables when an application changes protection domains.
1038
1039	  For details, see Documentation/core-api/protection-keys.rst
1040
1041	  If unsure, say y.
1042
1043config PPC_SECURE_BOOT
1044	prompt "Enable secure boot support"
1045	bool
1046	depends on PPC_POWERNV || PPC_PSERIES
1047	depends on IMA_ARCH_POLICY
1048	imply IMA_SECURE_AND_OR_TRUSTED_BOOT
1049	select PSERIES_PLPKS if PPC_PSERIES
1050	help
1051	  Systems with firmware secure boot enabled need to define security
1052	  policies to extend secure boot to the OS. This config allows a user
1053	  to enable OS secure boot on systems that have firmware support for
1054	  it. If in doubt say N.
1055
1056config PPC_SECVAR_SYSFS
1057	bool "Enable sysfs interface for POWER secure variables"
1058	default y
1059	depends on PPC_SECURE_BOOT
1060	depends on SYSFS
1061	help
1062	  POWER secure variables are managed and controlled by firmware.
1063	  These variables are exposed to userspace via sysfs to enable
1064	  read/write operations on these variables. Say Y if you have
1065	  secure boot enabled and want to expose variables to userspace.
1066
1067endmenu
1068
1069config ISA_DMA_API
1070	bool
1071	default PCI
1072
1073menu "Bus options"
1074
1075config ISA
1076	bool "Support for ISA-bus hardware"
1077	depends on PPC_CHRP
1078	select PPC_I8259
1079	help
1080	  Find out whether you have ISA slots on your motherboard.  ISA is the
1081	  name of a bus system, i.e. the way the CPU talks to the other stuff
1082	  inside your box.  If you have an Apple machine, say N here; if you
1083	  have an IBM RS/6000 or pSeries machine, say Y.  If you have an
1084	  embedded board, consult your board documentation.
1085
1086config GENERIC_ISA_DMA
1087	bool
1088	depends on ISA_DMA_API
1089	default y
1090
1091config PPC_INDIRECT_PCI
1092	bool
1093	depends on PCI
1094	default y if 40x || 44x
1095
1096config SBUS
1097	bool
1098
1099config FSL_SOC
1100	bool
1101
1102config FSL_PCI
1103	bool
1104	select ARCH_HAS_DMA_SET_MASK
1105	select PPC_INDIRECT_PCI
1106	select PCI_QUIRKS
1107
1108config FSL_PMC
1109	bool
1110	default y
1111	depends on SUSPEND && (PPC_85xx || PPC_86xx)
1112	help
1113	  Freescale MPC85xx/MPC86xx power management controller support
1114	  (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
1115
1116config PPC4xx_CPM
1117	bool
1118	default y
1119	depends on SUSPEND && (44x || 40x)
1120	help
1121	  PPC4xx Clock Power Management (CPM) support (suspend/resume).
1122	  It also enables support for two different idle states (idle-wait
1123	  and idle-doze).
1124
1125config 4xx_SOC
1126	bool
1127
1128config FSL_LBC
1129	bool "Freescale Local Bus support"
1130	help
1131	  Enables reporting of errors from the Freescale local bus
1132	  controller.  Also contains some common code used by
1133	  drivers for specific local bus peripherals.
1134
1135config FSL_GTM
1136	bool
1137	depends on PPC_83xx || QUICC_ENGINE || CPM2
1138	help
1139	  Freescale General-purpose Timers support
1140
1141config FSL_RIO
1142	bool "Freescale Embedded SRIO Controller support"
1143	depends on RAPIDIO = y && HAVE_RAPIDIO
1144	default "n"
1145	help
1146	  Include support for RapidIO controller on Freescale embedded
1147	  processors (MPC8548, MPC8641, etc).
1148
1149endmenu
1150
1151config NONSTATIC_KERNEL
1152	bool
1153
1154menu "Advanced setup"
1155	depends on PPC32
1156
1157config ADVANCED_OPTIONS
1158	bool "Prompt for advanced kernel configuration options"
1159	help
1160	  This option will enable prompting for a variety of advanced kernel
1161	  configuration options.  These options can cause the kernel to not
1162	  work if they are set incorrectly, but can be used to optimize certain
1163	  aspects of kernel memory management.
1164
1165	  Unless you know what you are doing, say N here.
1166
1167comment "Default settings for advanced configuration options are used"
1168	depends on !ADVANCED_OPTIONS
1169
1170config LOWMEM_SIZE_BOOL
1171	bool "Set maximum low memory"
1172	depends on ADVANCED_OPTIONS
1173	help
1174	  This option allows you to set the maximum amount of memory which
1175	  will be used as "low memory", that is, memory which the kernel can
1176	  access directly, without having to set up a kernel virtual mapping.
1177	  This can be useful in optimizing the layout of kernel virtual
1178	  memory.
1179
1180	  Say N here unless you know what you are doing.
1181
1182config LOWMEM_SIZE
1183	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1184	default "0x30000000"
1185
1186config LOWMEM_CAM_NUM_BOOL
1187	bool "Set number of CAMs to use to map low memory"
1188	depends on ADVANCED_OPTIONS && PPC_85xx
1189	help
1190	  This option allows you to set the maximum number of CAM slots that
1191	  will be used to map low memory.  There are a limited number of slots
1192	  available and even more limited number that will fit in the L1 MMU.
1193	  However, using more entries will allow mapping more low memory.  This
1194	  can be useful in optimizing the layout of kernel virtual memory.
1195
1196	  Say N here unless you know what you are doing.
1197
1198config LOWMEM_CAM_NUM
1199	depends on PPC_85xx
1200	int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1201	default 3 if !STRICT_KERNEL_RWX
1202	default 9 if DATA_SHIFT >= 24
1203	default 12 if DATA_SHIFT >= 22
1204	default 15
1205
1206config DYNAMIC_MEMSTART
1207	bool "Enable page aligned dynamic load address for kernel"
1208	depends on ADVANCED_OPTIONS && FLATMEM && (PPC_85xx || 44x)
1209	select NONSTATIC_KERNEL
1210	help
1211	  This option enables the kernel to be loaded at any page aligned
1212	  physical address. The kernel creates a mapping from KERNELBASE to
1213	  the address where the kernel is loaded. The page size here implies
1214	  the TLB page size of the mapping for kernel on the particular platform.
1215	  Please refer to the init code for finding the TLB page size.
1216
1217	  DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1218	  kernel image, where the only restriction is the page aligned kernel
1219	  load address. When this option is enabled, the compile time physical
1220	  address CONFIG_PHYSICAL_START is ignored.
1221
1222	  This option is overridden by CONFIG_RELOCATABLE
1223
1224config PAGE_OFFSET_BOOL
1225	bool "Set custom page offset address"
1226	depends on ADVANCED_OPTIONS
1227	help
1228	  This option allows you to set the kernel virtual address at which
1229	  the kernel will map low memory.  This can be useful in optimizing
1230	  the virtual memory layout of the system.
1231
1232	  Say N here unless you know what you are doing.
1233
1234config PAGE_OFFSET
1235	hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1236	default "0xc0000000"
1237
1238config KERNEL_START_BOOL
1239	bool "Set custom kernel base address"
1240	depends on ADVANCED_OPTIONS
1241	help
1242	  This option allows you to set the kernel virtual address at which
1243	  the kernel will be loaded.  Normally this should match PAGE_OFFSET
1244	  however there are times (like kdump) that one might not want them
1245	  to be the same.
1246
1247	  Say N here unless you know what you are doing.
1248
1249config KERNEL_START
1250	hex "Virtual address of kernel base" if KERNEL_START_BOOL
1251	default PAGE_OFFSET if PAGE_OFFSET_BOOL
1252	default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1253	default "0xc0000000"
1254
1255config PHYSICAL_START_BOOL
1256	bool "Set physical address where the kernel is loaded"
1257	depends on ADVANCED_OPTIONS && FLATMEM && PPC_85xx
1258	help
1259	  This gives the physical address where the kernel is loaded.
1260
1261	  Say N here unless you know what you are doing.
1262
1263config PHYSICAL_START
1264	hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1265	default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL
1266	default "0x00000000"
1267
1268config PHYSICAL_ALIGN
1269	hex
1270	default "0x04000000" if PPC_85xx
1271	help
1272	  This value puts the alignment restrictions on physical address
1273	  where kernel is loaded and run from. Kernel is compiled for an
1274	  address which meets above alignment restriction.
1275
1276config TASK_SIZE_BOOL
1277	bool "Set custom user task size"
1278	depends on ADVANCED_OPTIONS
1279	help
1280	  This option allows you to set the amount of virtual address space
1281	  allocated to user tasks.  This can be useful in optimizing the
1282	  virtual memory layout of the system.
1283
1284	  Say N here unless you know what you are doing.
1285
1286config TASK_SIZE
1287	hex "Size of user task space" if TASK_SIZE_BOOL
1288	default "0x80000000" if PPC_8xx
1289	default "0xb0000000" if PPC_BOOK3S_32
1290	default "0xc0000000"
1291endmenu
1292
1293if PPC64
1294# This value must have zeroes in the bottom 60 bits otherwise lots will break
1295config PAGE_OFFSET
1296	hex
1297	default "0xc000000000000000"
1298config KERNEL_START
1299	hex
1300	default "0xc000000000000000"
1301config PHYSICAL_START
1302	hex
1303	default "0x00000000"
1304endif
1305
1306config PPC_LIB_RHEAP
1307	bool
1308
1309source "arch/powerpc/kvm/Kconfig"
1310
1311source "kernel/livepatch/Kconfig"
1312