xref: /openbmc/linux/arch/powerpc/Kconfig (revision 512dd354)
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 32BIT
8	bool
9	default y if PPC32
10
11config 64BIT
12	bool
13	default y if PPC64
14
15config LIVEPATCH_64
16	def_bool PPC64
17	depends on LIVEPATCH
18
19config MMU
20	bool
21	default y
22
23config ARCH_MMAP_RND_BITS_MAX
24	# On Book3S 64, the default virtual address space for 64-bit processes
25	# is 2^47 (128TB). As a maximum, allow randomisation to consume up to
26	# 32T of address space (2^45), which should ensure a reasonable gap
27	# between bottom-up and top-down allocations for applications that
28	# consume "normal" amounts of address space. Book3S 64 only supports 64K
29	# and 4K page sizes.
30	default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K)
31	default 33 if PPC_BOOK3S_64		     # 33 = 45 (32T) - 12 (4K)
32	#
33	# On all other 64-bit platforms (currently only Book3E), the virtual
34	# address space is 2^46 (64TB). Allow randomisation to consume up to 16T
35	# of address space (2^44). Only 4K page sizes are supported.
36	default 32 if 64BIT	# 32 = 44 (16T) - 12 (4K)
37	#
38	# For 32-bit, use the compat values, as they're the same.
39	default ARCH_MMAP_RND_COMPAT_BITS_MAX
40
41config ARCH_MMAP_RND_BITS_MIN
42	# Allow randomisation to consume up to 1GB of address space (2^30).
43	default 14 if 64BIT && PPC_64K_PAGES	# 14 = 30 (1GB) - 16 (64K)
44	default 18 if 64BIT			# 18 = 30 (1GB) - 12 (4K)
45	#
46	# For 32-bit, use the compat values, as they're the same.
47	default ARCH_MMAP_RND_COMPAT_BITS_MIN
48
49config ARCH_MMAP_RND_COMPAT_BITS_MAX
50	# Total virtual address space for 32-bit processes is 2^31 (2GB).
51	# Allow randomisation to consume up to 512MB of address space (2^29).
52	default 11 if PPC_256K_PAGES	# 11 = 29 (512MB) - 18 (256K)
53	default 13 if PPC_64K_PAGES	# 13 = 29 (512MB) - 16 (64K)
54	default 15 if PPC_16K_PAGES	# 15 = 29 (512MB) - 14 (16K)
55	default 17			# 17 = 29 (512MB) - 12 (4K)
56
57config ARCH_MMAP_RND_COMPAT_BITS_MIN
58	# Total virtual address space for 32-bit processes is 2^31 (2GB).
59	# Allow randomisation to consume up to 8MB of address space (2^23).
60	default 5 if PPC_256K_PAGES	#  5 = 23 (8MB) - 18 (256K)
61	default 7 if PPC_64K_PAGES	#  7 = 23 (8MB) - 16 (64K)
62	default 9 if PPC_16K_PAGES	#  9 = 23 (8MB) - 14 (16K)
63	default 11			# 11 = 23 (8MB) - 12 (4K)
64
65config NR_IRQS
66	int "Number of virtual interrupt numbers"
67	range 32 1048576
68	default "512"
69	help
70	  This defines the number of virtual interrupt numbers the kernel
71	  can manage. Virtual interrupt numbers are what you see in
72	  /proc/interrupts. If you configure your system to have too few,
73	  drivers will fail to load or worse - handle with care.
74
75config NMI_IPI
76	bool
77	depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR)
78	default y
79
80config PPC_WATCHDOG
81	bool
82	depends on HARDLOCKUP_DETECTOR
83	depends on HAVE_HARDLOCKUP_DETECTOR_ARCH
84	default y
85	help
86	  This is a placeholder when the powerpc hardlockup detector
87	  watchdog is selected (arch/powerpc/kernel/watchdog.c). It is
88	  selected via the generic lockup detector menu which is why we
89	  have no standalone config option for it here.
90
91config STACKTRACE_SUPPORT
92	bool
93	default y
94
95config LOCKDEP_SUPPORT
96	bool
97	default y
98
99config GENERIC_LOCKBREAK
100	bool
101	default y
102	depends on SMP && PREEMPTION && !PPC_QUEUED_SPINLOCKS
103
104config GENERIC_HWEIGHT
105	bool
106	default y
107
108config PPC
109	bool
110	default y
111	#
112	# Please keep this list sorted alphabetically.
113	#
114	select ARCH_32BIT_OFF_T if PPC32
115	select ARCH_DISABLE_KASAN_INLINE	if PPC_RADIX_MMU
116	select ARCH_ENABLE_MEMORY_HOTPLUG
117	select ARCH_ENABLE_MEMORY_HOTREMOVE
118	select ARCH_HAS_COPY_MC			if PPC64
119	select ARCH_HAS_CURRENT_STACK_POINTER
120	select ARCH_HAS_DEBUG_VIRTUAL
121	select ARCH_HAS_DEBUG_VM_PGTABLE
122	select ARCH_HAS_DEBUG_WX		if STRICT_KERNEL_RWX
123	select ARCH_HAS_DEVMEM_IS_ALLOWED
124	select ARCH_HAS_DMA_MAP_DIRECT 		if PPC_PSERIES
125	select ARCH_HAS_FORTIFY_SOURCE
126	select ARCH_HAS_GCOV_PROFILE_ALL
127	select ARCH_HAS_HUGEPD			if HUGETLB_PAGE
128	select ARCH_HAS_KCOV
129	select ARCH_HAS_MEMBARRIER_CALLBACKS
130	select ARCH_HAS_MEMBARRIER_SYNC_CORE
131	select ARCH_HAS_MEMREMAP_COMPAT_ALIGN	if PPC_64S_HASH_MMU
132	select ARCH_HAS_MMIOWB			if PPC64
133	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
134	select ARCH_HAS_PHYS_TO_DMA
135	select ARCH_HAS_PMEM_API
136	select ARCH_HAS_PTE_DEVMAP		if PPC_BOOK3S_64
137	select ARCH_HAS_PTE_SPECIAL
138	select ARCH_HAS_SCALED_CPUTIME		if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
139	select ARCH_HAS_SET_MEMORY
140	select ARCH_HAS_STRICT_KERNEL_RWX	if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION
141	select ARCH_HAS_STRICT_KERNEL_RWX	if PPC_85xx && !HIBERNATION && !RANDOMIZE_BASE
142	select ARCH_HAS_STRICT_MODULE_RWX	if ARCH_HAS_STRICT_KERNEL_RWX
143	select ARCH_HAS_SYSCALL_WRAPPER		if !SPU_BASE && !COMPAT
144	select ARCH_HAS_TICK_BROADCAST		if GENERIC_CLOCKEVENTS_BROADCAST
145	select ARCH_HAS_UACCESS_FLUSHCACHE
146	select ARCH_HAS_UBSAN_SANITIZE_ALL
147	select ARCH_HAVE_NMI_SAFE_CMPXCHG
148	select ARCH_KEEP_MEMBLOCK
149	select ARCH_MIGHT_HAVE_PC_PARPORT
150	select ARCH_MIGHT_HAVE_PC_SERIO
151	select ARCH_OPTIONAL_KERNEL_RWX		if ARCH_HAS_STRICT_KERNEL_RWX
152	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
153	select ARCH_SPLIT_ARG64			if PPC32
154	select ARCH_STACKWALK
155	select ARCH_SUPPORTS_ATOMIC_RMW
156	select ARCH_SUPPORTS_DEBUG_PAGEALLOC	if PPC_BOOK3S || PPC_8xx || 40x
157	select ARCH_USE_BUILTIN_BSWAP
158	select ARCH_USE_CMPXCHG_LOCKREF		if PPC64
159	select ARCH_USE_MEMTEST
160	select ARCH_USE_QUEUED_RWLOCKS		if PPC_QUEUED_SPINLOCKS
161	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
162	select ARCH_WANT_IPC_PARSE_VERSION
163	select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
164	select ARCH_WANT_LD_ORPHAN_WARN
165	select ARCH_WANTS_MODULES_DATA_IN_VMALLOC	if PPC_BOOK3S_32 || PPC_8xx
166	select ARCH_WEAK_RELEASE_ACQUIRE
167	select BINFMT_ELF
168	select BUILDTIME_TABLE_SORT
169	select CLONE_BACKWARDS
170	select CPUMASK_OFFSTACK			if NR_CPUS >= 8192
171	select DCACHE_WORD_ACCESS		if PPC64 && CPU_LITTLE_ENDIAN
172	select DMA_OPS_BYPASS			if PPC64
173	select DMA_OPS				if PPC64
174	select DYNAMIC_FTRACE			if FUNCTION_TRACER
175	select EDAC_ATOMIC_SCRUB
176	select EDAC_SUPPORT
177	select GENERIC_ATOMIC64			if PPC32
178	select GENERIC_CLOCKEVENTS_BROADCAST	if SMP
179	select GENERIC_CMOS_UPDATE
180	select GENERIC_CPU_AUTOPROBE
181	select GENERIC_CPU_VULNERABILITIES	if PPC_BARRIER_NOSPEC
182	select GENERIC_EARLY_IOREMAP
183	select GENERIC_GETTIMEOFDAY
184	select GENERIC_IRQ_SHOW
185	select GENERIC_IRQ_SHOW_LEVEL
186	select GENERIC_PCI_IOMAP		if PCI
187	select GENERIC_PTDUMP
188	select GENERIC_SMP_IDLE_THREAD
189	select GENERIC_TIME_VSYSCALL
190	select GENERIC_VDSO_TIME_NS
191	select HAVE_ARCH_AUDITSYSCALL
192	select HAVE_ARCH_HUGE_VMALLOC		if HAVE_ARCH_HUGE_VMAP
193	select HAVE_ARCH_HUGE_VMAP		if PPC_RADIX_MMU || PPC_8xx
194	select HAVE_ARCH_JUMP_LABEL
195	select HAVE_ARCH_JUMP_LABEL_RELATIVE
196	select HAVE_ARCH_KASAN			if PPC32 && PPC_PAGE_SHIFT <= 14
197	select HAVE_ARCH_KASAN			if PPC_RADIX_MMU
198	select HAVE_ARCH_KASAN			if PPC_BOOK3E_64
199	select HAVE_ARCH_KASAN_VMALLOC		if HAVE_ARCH_KASAN
200	select HAVE_ARCH_KCSAN            	if PPC_BOOK3S_64
201	select HAVE_ARCH_KFENCE			if ARCH_SUPPORTS_DEBUG_PAGEALLOC
202	select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
203	select HAVE_ARCH_KGDB
204	select HAVE_ARCH_MMAP_RND_BITS
205	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if COMPAT
206	select HAVE_ARCH_NVRAM_OPS
207	select HAVE_ARCH_SECCOMP_FILTER
208	select HAVE_ARCH_TRACEHOOK
209	select HAVE_ASM_MODVERSIONS
210	select HAVE_CONTEXT_TRACKING_USER
211	select HAVE_C_RECORDMCOUNT
212	select HAVE_DEBUG_KMEMLEAK
213	select HAVE_DEBUG_STACKOVERFLOW
214	select HAVE_DYNAMIC_FTRACE
215	select HAVE_DYNAMIC_FTRACE_WITH_ARGS	if MPROFILE_KERNEL || PPC32
216	select HAVE_DYNAMIC_FTRACE_WITH_REGS	if MPROFILE_KERNEL || PPC32
217	select HAVE_EBPF_JIT
218	select HAVE_EFFICIENT_UNALIGNED_ACCESS
219	select HAVE_FAST_GUP
220	select HAVE_FTRACE_MCOUNT_RECORD
221	select HAVE_FUNCTION_DESCRIPTORS	if PPC64_ELF_ABI_V1
222	select HAVE_FUNCTION_ERROR_INJECTION
223	select HAVE_FUNCTION_GRAPH_TRACER
224	select HAVE_FUNCTION_TRACER
225	select HAVE_GCC_PLUGINS			if GCC_VERSION >= 50200   # plugin support on gcc <= 5.1 is buggy on PPC
226	select HAVE_GENERIC_VDSO
227	select HAVE_HARDLOCKUP_DETECTOR_ARCH	if PPC_BOOK3S_64 && SMP
228	select HAVE_HARDLOCKUP_DETECTOR_PERF	if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH
229	select HAVE_HW_BREAKPOINT		if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
230	select HAVE_IOREMAP_PROT
231	select HAVE_IRQ_TIME_ACCOUNTING
232	select HAVE_KERNEL_GZIP
233	select HAVE_KERNEL_LZMA			if DEFAULT_UIMAGE
234	select HAVE_KERNEL_LZO			if DEFAULT_UIMAGE
235	select HAVE_KERNEL_XZ			if PPC_BOOK3S || 44x
236	select HAVE_KPROBES
237	select HAVE_KPROBES_ON_FTRACE
238	select HAVE_KRETPROBES
239	select HAVE_LD_DEAD_CODE_DATA_ELIMINATION if HAVE_OBJTOOL_MCOUNT
240	select HAVE_LIVEPATCH			if HAVE_DYNAMIC_FTRACE_WITH_REGS
241	select HAVE_MOD_ARCH_SPECIFIC
242	select HAVE_NMI				if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
243	select HAVE_OPTPROBES
244	select HAVE_OBJTOOL			if PPC32 || MPROFILE_KERNEL
245	select HAVE_OBJTOOL_MCOUNT		if HAVE_OBJTOOL
246	select HAVE_PERF_EVENTS
247	select HAVE_PERF_EVENTS_NMI		if PPC64
248	select HAVE_PERF_REGS
249	select HAVE_PERF_USER_STACK_DUMP
250	select HAVE_REGS_AND_STACK_ACCESS_API
251	select HAVE_RELIABLE_STACKTRACE
252	select HAVE_RSEQ
253	select HAVE_SETUP_PER_CPU_AREA		if PPC64
254	select HAVE_SOFTIRQ_ON_OWN_STACK
255	select HAVE_STACKPROTECTOR		if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
256	select HAVE_STACKPROTECTOR		if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
257	select HAVE_STATIC_CALL			if PPC32
258	select HAVE_SYSCALL_TRACEPOINTS
259	select HAVE_VIRT_CPU_ACCOUNTING
260	select HAVE_VIRT_CPU_ACCOUNTING_GEN
261	select HUGETLB_PAGE_SIZE_VARIABLE	if PPC_BOOK3S_64 && HUGETLB_PAGE
262	select IOMMU_HELPER			if PPC64
263	select IRQ_DOMAIN
264	select IRQ_FORCED_THREADING
265	select KASAN_VMALLOC			if KASAN && MODULES
266	select MMU_GATHER_PAGE_SIZE
267	select MMU_GATHER_RCU_TABLE_FREE
268	select MMU_GATHER_MERGE_VMAS
269	select MODULES_USE_ELF_RELA
270	select NEED_DMA_MAP_STATE		if PPC64 || NOT_COHERENT_CACHE
271	select NEED_PER_CPU_EMBED_FIRST_CHUNK	if PPC64
272	select NEED_PER_CPU_PAGE_FIRST_CHUNK	if PPC64
273	select NEED_SG_DMA_LENGTH
274	select OF
275	select OF_DMA_DEFAULT_COHERENT		if !NOT_COHERENT_CACHE
276	select OF_EARLY_FLATTREE
277	select OLD_SIGACTION			if PPC32
278	select OLD_SIGSUSPEND
279	select PCI_DOMAINS			if PCI
280	select PCI_MSI_ARCH_FALLBACKS		if PCI_MSI
281	select PCI_SYSCALL			if PCI
282	select PPC_DAWR				if PPC64
283	select RTC_LIB
284	select SPARSE_IRQ
285	select STRICT_KERNEL_RWX if STRICT_MODULE_RWX
286	select SYSCTL_EXCEPTION_TRACE
287	select THREAD_INFO_IN_TASK
288	select TRACE_IRQFLAGS_SUPPORT
289	#
290	# Please keep this list sorted alphabetically.
291	#
292
293config PPC_LONG_DOUBLE_128
294	depends on PPC64 && ALTIVEC
295	def_bool $(success,test "$(shell,echo __LONG_DOUBLE_128__ | $(CC) -E -P -)" = 1)
296
297config PPC_BARRIER_NOSPEC
298	bool
299	default y
300	depends on PPC_BOOK3S_64 || PPC_E500
301
302config PPC_HAS_LBARX_LHARX
303	bool
304
305config EARLY_PRINTK
306	bool
307	default y
308
309config PANIC_TIMEOUT
310	int
311	default 180
312
313config COMPAT
314	bool "Enable support for 32bit binaries"
315	depends on PPC64
316	depends on !CC_IS_CLANG || CLANG_VERSION >= 120000
317	default y if !CPU_LITTLE_ENDIAN
318	select ARCH_WANT_OLD_COMPAT_IPC
319	select COMPAT_OLD_SIGACTION
320
321config SCHED_OMIT_FRAME_POINTER
322	bool
323	default y
324
325config ARCH_MAY_HAVE_PC_FDC
326	bool
327	default PCI
328
329config PPC_UDBG_16550
330	bool
331
332config GENERIC_TBSYNC
333	bool
334	default y if PPC32 && SMP
335
336config AUDIT_ARCH
337	bool
338	default y
339
340config GENERIC_BUG
341	bool
342	default y
343	depends on BUG
344
345config GENERIC_BUG_RELATIVE_POINTERS
346	def_bool y
347	depends on GENERIC_BUG
348
349config SYS_SUPPORTS_APM_EMULATION
350	default y if PMAC_APM_EMU
351	bool
352
353config EPAPR_BOOT
354	bool
355	help
356	  Used to allow a board to specify it wants an ePAPR compliant wrapper.
357
358config DEFAULT_UIMAGE
359	bool
360	help
361	  Used to allow a board to specify it wants a uImage built by default
362
363config ARCH_HIBERNATION_POSSIBLE
364	bool
365	default y
366
367config ARCH_SUSPEND_POSSIBLE
368	def_bool y
369	depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
370		   (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
371		   || 44x || 40x
372
373config ARCH_SUSPEND_NONZERO_CPU
374	def_bool y
375	depends on PPC_POWERNV || PPC_PSERIES
376
377config ARCH_HAS_ADD_PAGES
378	def_bool y
379	depends on ARCH_ENABLE_MEMORY_HOTPLUG
380
381config PPC_DCR_NATIVE
382	bool
383
384config PPC_DCR_MMIO
385	bool
386
387config PPC_DCR
388	bool
389	depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
390	default y
391
392config PPC_PCI_OF_BUS_MAP
393	bool "Use pci_to_OF_bus_map (deprecated)"
394	depends on PPC32
395	depends on PPC_PMAC || PPC_CHRP
396	help
397	  This option uses pci_to_OF_bus_map to map OF nodes to PCI devices, which
398	  restricts the system to only having 256 PCI buses. On CHRP it also causes
399	  the "pci-OF-bus-map" property to be created in the device tree.
400
401	  If unsure, say "N".
402
403config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
404	depends on PPC32
405	depends on !PPC_PCI_OF_BUS_MAP
406	bool "Assign PCI bus numbers from zero individually for each PCI domain"
407	default y
408	help
409	  By default on PPC32 were PCI bus numbers unique across all PCI domains.
410	  So system could have only 256 PCI buses independently of available
411	  PCI domains. When this option is enabled then PCI bus numbers are
412	  PCI domain dependent and each PCI controller on own domain can have
413	  256 PCI buses, like it is on other Linux architectures.
414
415config PPC_OF_PLATFORM_PCI
416	bool
417	depends on PCI
418	depends on PPC64 # not supported on 32 bits yet
419
420config ARCH_SUPPORTS_UPROBES
421	def_bool y
422
423config PPC_ADV_DEBUG_REGS
424	bool
425	depends on 40x || BOOKE
426	default y
427
428config PPC_ADV_DEBUG_IACS
429	int
430	depends on PPC_ADV_DEBUG_REGS
431	default 4 if 44x
432	default 2
433
434config PPC_ADV_DEBUG_DACS
435	int
436	depends on PPC_ADV_DEBUG_REGS
437	default 2
438
439config PPC_ADV_DEBUG_DVCS
440	int
441	depends on PPC_ADV_DEBUG_REGS
442	default 2 if 44x
443	default 0
444
445config PPC_ADV_DEBUG_DAC_RANGE
446	bool
447	depends on PPC_ADV_DEBUG_REGS && 44x
448	default y
449
450config PPC_DAWR
451	bool
452
453config PGTABLE_LEVELS
454	int
455	default 2 if !PPC64
456	default 4
457
458source "arch/powerpc/sysdev/Kconfig"
459source "arch/powerpc/platforms/Kconfig"
460
461menu "Kernel options"
462
463config HIGHMEM
464	bool "High memory support"
465	depends on PPC32
466	select KMAP_LOCAL
467
468source "kernel/Kconfig.hz"
469
470config MATH_EMULATION
471	bool "Math emulation"
472	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
473	select PPC_FPU_REGS
474	help
475	  Some PowerPC chips designed for embedded applications do not have
476	  a floating-point unit and therefore do not implement the
477	  floating-point instructions in the PowerPC instruction set.  If you
478	  say Y here, the kernel will include code to emulate a floating-point
479	  unit, which will allow programs that use floating-point
480	  instructions to run.
481
482	  This is also useful to emulate missing (optional) instructions
483	  such as fsqrt on cores that do have an FPU but do not implement
484	  them (such as Freescale BookE).
485
486choice
487	prompt "Math emulation options"
488	default MATH_EMULATION_FULL
489	depends on MATH_EMULATION
490
491config MATH_EMULATION_FULL
492	bool "Emulate all the floating point instructions"
493	help
494	  Select this option will enable the kernel to support to emulate
495	  all the floating point instructions. If your SoC doesn't have
496	  a FPU, you should select this.
497
498config MATH_EMULATION_HW_UNIMPLEMENTED
499	bool "Just emulate the FPU unimplemented instructions"
500	help
501	  Select this if you know there does have a hardware FPU on your
502	  SoC, but some floating point instructions are not implemented by that.
503
504endchoice
505
506config PPC_TRANSACTIONAL_MEM
507	bool "Transactional Memory support for POWERPC"
508	depends on PPC_BOOK3S_64
509	depends on SMP
510	select ALTIVEC
511	select VSX
512	help
513	  Support user-mode Transactional Memory on POWERPC.
514
515config PPC_UV
516	bool "Ultravisor support"
517	depends on KVM_BOOK3S_HV_POSSIBLE
518	depends on DEVICE_PRIVATE
519	default n
520	help
521	  This option paravirtualizes the kernel to run in POWER platforms that
522	  supports the Protected Execution Facility (PEF). On such platforms,
523	  the ultravisor firmware runs at a privilege level above the
524	  hypervisor.
525
526	  If unsure, say "N".
527
528config LD_HEAD_STUB_CATCH
529	bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
530	depends on PPC64
531	help
532	  Very large kernels can cause linker branch stubs to be generated by
533	  code in head_64.S, which moves the head text sections out of their
534	  specified location. This option can work around the problem.
535
536	  If unsure, say "N".
537
538config MPROFILE_KERNEL
539	depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER
540	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__)
541
542config HOTPLUG_CPU
543	bool "Support for enabling/disabling CPUs"
544	depends on SMP && (PPC_PSERIES || \
545		PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
546	help
547	  Say Y here to be able to disable and re-enable individual
548	  CPUs at runtime on SMP machines.
549
550	  Say N if you are unsure.
551
552config INTERRUPT_SANITIZE_REGISTERS
553	bool "Clear gprs on interrupt arrival"
554	depends on PPC64 && ARCH_HAS_SYSCALL_WRAPPER
555	default PPC_BOOK3E_64 || PPC_PSERIES || PPC_POWERNV
556	help
557	  Reduce the influence of user register state on interrupt handlers and
558	  syscalls through clearing user state from registers before handling
559	  the exception.
560
561config PPC_QUEUED_SPINLOCKS
562	bool "Queued spinlocks" if EXPERT
563	depends on SMP
564	default PPC_BOOK3S_64
565	help
566	  Say Y here to use queued spinlocks which give better scalability and
567	  fairness on large SMP and NUMA systems without harming single threaded
568	  performance.
569
570config ARCH_CPU_PROBE_RELEASE
571	def_bool y
572	depends on HOTPLUG_CPU
573
574config PPC64_SUPPORTS_MEMORY_FAILURE
575	bool "Add support for memory hwpoison"
576	depends on PPC_BOOK3S_64
577	default "y" if PPC_POWERNV
578	select ARCH_SUPPORTS_MEMORY_FAILURE
579
580config KEXEC
581	bool "kexec system call"
582	depends on PPC_BOOK3S || PPC_E500 || (44x && !SMP)
583	select KEXEC_CORE
584	help
585	  kexec is a system call that implements the ability to shutdown your
586	  current kernel, and to start another kernel.  It is like a reboot
587	  but it is independent of the system firmware.   And like a reboot
588	  you can start any kernel with it, not just Linux.
589
590	  The name comes from the similarity to the exec system call.
591
592	  It is an ongoing process to be certain the hardware in a machine
593	  is properly shutdown, so do not be surprised if this code does not
594	  initially work for you.  As of this writing the exact hardware
595	  interface is strongly in flux, so no good recommendation can be
596	  made.
597
598config KEXEC_FILE
599	bool "kexec file based system call"
600	select KEXEC_CORE
601	select HAVE_IMA_KEXEC if IMA
602	select KEXEC_ELF
603	depends on PPC64
604	depends on CRYPTO=y
605	depends on CRYPTO_SHA256=y
606	help
607	  This is a new version of the kexec system call. This call is
608	  file based and takes in file descriptors as system call arguments
609	  for kernel and initramfs as opposed to a list of segments as is the
610	  case for the older kexec call.
611
612config ARCH_HAS_KEXEC_PURGATORY
613	def_bool KEXEC_FILE
614
615config PPC64_BIG_ENDIAN_ELF_ABI_V2
616	bool "Build big-endian kernel using ELF ABI V2 (EXPERIMENTAL)"
617	depends on PPC64 && CPU_BIG_ENDIAN
618	depends on CC_HAS_ELFV2
619	depends on LD_IS_BFD && LD_VERSION >= 22400
620	default n
621	help
622	  This builds the kernel image using the "Power Architecture 64-Bit ELF
623	  V2 ABI Specification", which has a reduced stack overhead and faster
624	  function calls. This internal kernel ABI option does not affect
625          userspace compatibility.
626
627	  The V2 ABI is standard for 64-bit little-endian, but for big-endian
628	  it is less well tested by kernel and toolchain. However some distros
629	  build userspace this way, and it can produce a functioning kernel.
630
631	  This requires GCC and binutils 2.24 or newer.
632
633config RELOCATABLE
634	bool "Build a relocatable kernel"
635	depends on PPC64 || (FLATMEM && (44x || PPC_85xx))
636	select NONSTATIC_KERNEL
637	help
638	  This builds a kernel image that is capable of running at the
639	  location the kernel is loaded at. For ppc32, there is no any
640	  alignment restrictions, and this feature is a superset of
641	  DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
642	  16k-aligned base address. The kernel is linked as a
643	  position-independent executable (PIE) and contains dynamic relocations
644	  which are processed early in the bootup process.
645
646	  One use is for the kexec on panic case where the recovery kernel
647	  must live at a different physical address than the primary
648	  kernel.
649
650	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
651	  it has been loaded at and the compile time physical addresses
652	  CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
653	  setting can still be useful to bootwrappers that need to know the
654	  load address of the kernel (eg. u-boot/mkimage).
655
656config RANDOMIZE_BASE
657	bool "Randomize the address of the kernel image"
658	depends on PPC_85xx && FLATMEM
659	depends on RELOCATABLE
660	help
661	  Randomizes the virtual address at which the kernel image is
662	  loaded, as a security feature that deters exploit attempts
663	  relying on knowledge of the location of kernel internals.
664
665	  If unsure, say Y.
666
667config RELOCATABLE_TEST
668	bool "Test relocatable kernel"
669	depends on (PPC64 && RELOCATABLE)
670	help
671	  This runs the relocatable kernel at the address it was initially
672	  loaded at, which tends to be non-zero and therefore test the
673	  relocation code.
674
675config CRASH_DUMP
676	bool "Build a dump capture kernel"
677	depends on PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)
678	select RELOCATABLE if PPC64 || 44x || PPC_85xx
679	help
680	  Build a kernel suitable for use as a dump capture kernel.
681	  The same kernel binary can be used as production kernel and dump
682	  capture kernel.
683
684config FA_DUMP
685	bool "Firmware-assisted dump"
686	depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
687	select CRASH_CORE
688	select CRASH_DUMP
689	help
690	  A robust mechanism to get reliable kernel crash dump with
691	  assistance from firmware. This approach does not use kexec,
692	  instead firmware assists in booting the capture kernel
693	  while preserving memory contents. Firmware-assisted dump
694	  is meant to be a kdump replacement offering robustness and
695	  speed not possible without system firmware assistance.
696
697	  If unsure, say "y". Only special kernels like petitboot may
698	  need to say "N" here.
699
700config PRESERVE_FA_DUMP
701	bool "Preserve Firmware-assisted dump"
702	depends on PPC64 && PPC_POWERNV && !FA_DUMP
703	help
704	  On a kernel with FA_DUMP disabled, this option helps to preserve
705	  crash data from a previously crash'ed kernel. Useful when the next
706	  memory preserving kernel boot would process this crash data.
707	  Petitboot kernel is the typical usecase for this option.
708
709config OPAL_CORE
710	bool "Export OPAL memory as /sys/firmware/opal/core"
711	depends on PPC64 && PPC_POWERNV
712	help
713	  This option uses the MPIPL support in firmware to provide an
714	  ELF core of OPAL memory after a crash. The ELF core is exported
715	  as /sys/firmware/opal/core file which is helpful in debugging
716	  OPAL crashes using GDB.
717
718config IRQ_ALL_CPUS
719	bool "Distribute interrupts on all CPUs by default"
720	depends on SMP
721	help
722	  This option gives the kernel permission to distribute IRQs across
723	  multiple CPUs.  Saying N here will route all IRQs to the first
724	  CPU.  Generally saying Y is safe, although some problems have been
725	  reported with SMP Power Macintoshes with this option enabled.
726
727config NUMA
728	bool "NUMA Memory Allocation and Scheduler Support"
729	depends on PPC64 && SMP
730	default y if PPC_PSERIES || PPC_POWERNV
731	select USE_PERCPU_NUMA_NODE_ID
732	help
733	  Enable NUMA (Non-Uniform Memory Access) support.
734
735	  The kernel will try to allocate memory used by a CPU on the
736	  local memory controller of the CPU and add some more
737	  NUMA awareness to the kernel.
738
739config NODES_SHIFT
740	int
741	default "8" if PPC64
742	default "4"
743	depends on NUMA
744
745config HAVE_MEMORYLESS_NODES
746	def_bool y
747	depends on NUMA
748
749config ARCH_SELECT_MEMORY_MODEL
750	def_bool y
751	depends on PPC64
752
753config ARCH_FLATMEM_ENABLE
754	def_bool y
755	depends on (PPC64 && !NUMA) || PPC32
756
757config ARCH_SPARSEMEM_ENABLE
758	def_bool y
759	depends on PPC64
760	select SPARSEMEM_VMEMMAP_ENABLE
761
762config ARCH_SPARSEMEM_DEFAULT
763	def_bool y
764	depends on PPC_BOOK3S_64
765
766config ILLEGAL_POINTER_VALUE
767	hex
768	# This is roughly half way between the top of user space and the bottom
769	# of kernel space, which seems about as good as we can get.
770	default 0x5deadbeef0000000 if PPC64
771	default 0
772
773config ARCH_MEMORY_PROBE
774	def_bool y
775	depends on MEMORY_HOTPLUG
776
777choice
778	prompt "Page size"
779	default PPC_64K_PAGES if PPC_BOOK3S_64
780	default PPC_4K_PAGES
781	help
782	  Select the kernel logical page size. Increasing the page size
783	  will reduce software overhead at each page boundary, allow
784	  hardware prefetch mechanisms to be more effective, and allow
785	  larger dma transfers increasing IO efficiency and reducing
786	  overhead. However the utilization of memory will increase.
787	  For example, each cached file will using a multiple of the
788	  page size to hold its contents and the difference between the
789	  end of file and the end of page is wasted.
790
791	  Some dedicated systems, such as software raid serving with
792	  accelerated calculations, have shown significant increases.
793
794	  If you configure a 64 bit kernel for 64k pages but the
795	  processor does not support them, then the kernel will simulate
796	  them with 4k pages, loading them on demand, but with the
797	  reduced software overhead and larger internal fragmentation.
798	  For the 32 bit kernel, a large page option will not be offered
799	  unless it is supported by the configured processor.
800
801	  If unsure, choose 4K_PAGES.
802
803config PPC_4K_PAGES
804	bool "4k page size"
805	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
806
807config PPC_16K_PAGES
808	bool "16k page size"
809	depends on 44x || PPC_8xx
810
811config PPC_64K_PAGES
812	bool "64k page size"
813	depends on 44x || PPC_BOOK3S_64
814	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
815
816config PPC_256K_PAGES
817	bool "256k page size (Requires non-standard binutils settings)"
818	depends on 44x && !PPC_47x
819	help
820	  Make the page size 256k.
821
822	  The kernel will only be able to run applications that have been
823	  compiled with '-zmax-page-size' set to 256K (the default is 64K) using
824	  binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE
825	  definition from 0x10000 to 0x40000 in older versions.
826
827endchoice
828
829config PAGE_SIZE_4KB
830	def_bool y
831	depends on PPC_4K_PAGES
832
833config PAGE_SIZE_16KB
834	def_bool y
835	depends on PPC_16K_PAGES
836
837config PAGE_SIZE_64KB
838	def_bool y
839	depends on PPC_64K_PAGES
840
841config PAGE_SIZE_256KB
842	def_bool y
843	depends on PPC_256K_PAGES
844
845config PPC_PAGE_SHIFT
846	int
847	default 18 if PPC_256K_PAGES
848	default 16 if PPC_64K_PAGES
849	default 14 if PPC_16K_PAGES
850	default 12
851
852config THREAD_SHIFT
853	int "Thread shift" if EXPERT
854	range 13 15
855	default "15" if PPC_256K_PAGES
856	default "14" if PPC64
857	default "13"
858	help
859	  Used to define the stack size. The default is almost always what you
860	  want. Only change this if you know what you are doing.
861
862config DATA_SHIFT_BOOL
863	bool "Set custom data alignment"
864	depends on ADVANCED_OPTIONS
865	depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE
866	depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \
867		   PPC_85xx
868	help
869	  This option allows you to set the kernel data alignment. When
870	  RAM is mapped by blocks, the alignment needs to fit the size and
871	  number of possible blocks. The default should be OK for most configs.
872
873	  Say N here unless you know what you are doing.
874
875config DATA_SHIFT
876	int "Data shift" if DATA_SHIFT_BOOL
877	default 24 if STRICT_KERNEL_RWX && PPC64
878	range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
879	range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
880	range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_85xx
881	default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
882	default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
883	default 23 if STRICT_KERNEL_RWX && PPC_8xx
884	default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA
885	default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
886	default 24 if STRICT_KERNEL_RWX && PPC_85xx
887	default PPC_PAGE_SHIFT
888	help
889	  On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO.
890	  Smaller is the alignment, greater is the number of necessary DBATs.
891
892	  On 8xx, large pages (512kb or 8M) are used to map kernel linear
893	  memory. Aligning to 8M reduces TLB misses as only 8M pages are used
894	  in that case. If PIN_TLB is selected, it must be aligned to 8M as
895	  8M pages will be pinned.
896
897config ARCH_FORCE_MAX_ORDER
898	int "Maximum zone order"
899	range 8 9 if PPC64 && PPC_64K_PAGES
900	default "9" if PPC64 && PPC_64K_PAGES
901	range 13 13 if PPC64 && !PPC_64K_PAGES
902	default "13" if PPC64 && !PPC_64K_PAGES
903	range 9 64 if PPC32 && PPC_16K_PAGES
904	default "9" if PPC32 && PPC_16K_PAGES
905	range 7 64 if PPC32 && PPC_64K_PAGES
906	default "7" if PPC32 && PPC_64K_PAGES
907	range 5 64 if PPC32 && PPC_256K_PAGES
908	default "5" if PPC32 && PPC_256K_PAGES
909	range 11 64
910	default "11"
911	help
912	  The kernel memory allocator divides physically contiguous memory
913	  blocks into "zones", where each zone is a power of two number of
914	  pages.  This option selects the largest power of two that the kernel
915	  keeps in the memory allocator.  If you need to allocate very large
916	  blocks of physically contiguous memory, then you may need to
917	  increase this value.
918
919	  This config option is actually maximum order plus one. For example,
920	  a value of 11 means that the largest free memory block is 2^10 pages.
921
922	  The page size is not necessarily 4KB.  For example, on 64-bit
923	  systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
924	  this in mind when choosing a value for this option.
925
926config PPC_SUBPAGE_PROT
927	bool "Support setting protections for 4k subpages (subpage_prot syscall)"
928	default n
929	depends on PPC_64S_HASH_MMU && PPC_64K_PAGES
930	help
931	  This option adds support for system call to allow user programs
932	  to set access permissions (read/write, readonly, or no access)
933	  on the 4k subpages of each 64k page.
934
935	  If unsure, say N here.
936
937config PPC_PROT_SAO_LPAR
938	bool "Support PROT_SAO mappings in LPARs"
939	depends on PPC_BOOK3S_64
940	help
941	  This option adds support for PROT_SAO mappings from userspace
942	  inside LPARs on supported CPUs.
943
944	  This may cause issues when performing guest migration from
945	  a CPU that supports SAO to one that does not.
946
947	  If unsure, say N here.
948
949config PPC_COPRO_BASE
950	bool
951
952config SCHED_SMT
953	bool "SMT (Hyperthreading) scheduler support"
954	depends on PPC64 && SMP
955	help
956	  SMT scheduler support improves the CPU scheduler's decision making
957	  when dealing with POWER5 cpus at a cost of slightly increased
958	  overhead in some places. If unsure say N here.
959
960config PPC_DENORMALISATION
961	bool "PowerPC denormalisation exception handling"
962	depends on PPC_BOOK3S_64
963	default "y" if PPC_POWERNV
964	help
965	  Add support for handling denormalisation of single precision
966	  values.  Useful for bare metal only.  If unsure say Y here.
967
968config CMDLINE
969	string "Initial kernel command string"
970	default ""
971	help
972	  On some platforms, there is currently no way for the boot loader to
973	  pass arguments to the kernel. For these platforms, you can supply
974	  some command-line options at build time by entering them here.  In
975	  most cases you will need to specify the root device here.
976
977choice
978	prompt "Kernel command line type" if CMDLINE != ""
979	default CMDLINE_FROM_BOOTLOADER
980
981config CMDLINE_FROM_BOOTLOADER
982	bool "Use bootloader kernel arguments if available"
983	help
984	  Uses the command-line options passed by the boot loader. If
985	  the boot loader doesn't provide any, the default kernel command
986	  string provided in CMDLINE will be used.
987
988config CMDLINE_EXTEND
989	bool "Extend bootloader kernel arguments"
990	help
991	  The command-line arguments provided by the boot loader will be
992	  appended to the default kernel command string.
993
994config CMDLINE_FORCE
995	bool "Always use the default kernel command string"
996	help
997	  Always use the default kernel command string, even if the boot
998	  loader passes other arguments to the kernel.
999	  This is useful if you cannot or don't want to change the
1000	  command-line options your boot loader passes to the kernel.
1001
1002endchoice
1003
1004config EXTRA_TARGETS
1005	string "Additional default image types"
1006	help
1007	  List additional targets to be built by the bootwrapper here (separated
1008	  by spaces).  This is useful for targets that depend of device tree
1009	  files in the .dts directory.
1010
1011	  Targets in this list will be build as part of the default build
1012	  target, or when the user does a 'make zImage' or a
1013	  'make zImage.initrd'.
1014
1015	  If unsure, leave blank
1016
1017config ARCH_WANTS_FREEZER_CONTROL
1018	def_bool y
1019	depends on ADB_PMU
1020
1021source "kernel/power/Kconfig"
1022
1023config PPC_MEM_KEYS
1024	prompt "PowerPC Memory Protection Keys"
1025	def_bool y
1026	depends on PPC_BOOK3S_64
1027	depends on PPC_64S_HASH_MMU
1028	select ARCH_USES_HIGH_VMA_FLAGS
1029	select ARCH_HAS_PKEYS
1030	help
1031	  Memory Protection Keys provides a mechanism for enforcing
1032	  page-based protections, but without requiring modification of the
1033	  page tables when an application changes protection domains.
1034
1035	  For details, see Documentation/core-api/protection-keys.rst
1036
1037	  If unsure, say y.
1038
1039config PPC_SECURE_BOOT
1040	prompt "Enable secure boot support"
1041	bool
1042	depends on PPC_POWERNV || PPC_PSERIES
1043	depends on IMA_ARCH_POLICY
1044	imply IMA_SECURE_AND_OR_TRUSTED_BOOT
1045	select PSERIES_PLPKS if PPC_PSERIES
1046	help
1047	  Systems with firmware secure boot enabled need to define security
1048	  policies to extend secure boot to the OS. This config allows a user
1049	  to enable OS secure boot on systems that have firmware support for
1050	  it. If in doubt say N.
1051
1052config PPC_SECVAR_SYSFS
1053	bool "Enable sysfs interface for POWER secure variables"
1054	default y
1055	depends on PPC_SECURE_BOOT
1056	depends on SYSFS
1057	help
1058	  POWER secure variables are managed and controlled by firmware.
1059	  These variables are exposed to userspace via sysfs to enable
1060	  read/write operations on these variables. Say Y if you have
1061	  secure boot enabled and want to expose variables to userspace.
1062
1063endmenu
1064
1065config ISA_DMA_API
1066	bool
1067	default PCI
1068
1069menu "Bus options"
1070
1071config ISA
1072	bool "Support for ISA-bus hardware"
1073	depends on PPC_CHRP
1074	select PPC_I8259
1075	help
1076	  Find out whether you have ISA slots on your motherboard.  ISA is the
1077	  name of a bus system, i.e. the way the CPU talks to the other stuff
1078	  inside your box.  If you have an Apple machine, say N here; if you
1079	  have an IBM RS/6000 or pSeries machine, say Y.  If you have an
1080	  embedded board, consult your board documentation.
1081
1082config GENERIC_ISA_DMA
1083	bool
1084	depends on ISA_DMA_API
1085	default y
1086
1087config PPC_INDIRECT_PCI
1088	bool
1089	depends on PCI
1090	default y if 40x || 44x
1091
1092config SBUS
1093	bool
1094
1095config FSL_SOC
1096	bool
1097
1098config FSL_PCI
1099	bool
1100	select ARCH_HAS_DMA_SET_MASK
1101	select PPC_INDIRECT_PCI
1102	select PCI_QUIRKS
1103
1104config FSL_PMC
1105	bool
1106	default y
1107	depends on SUSPEND && (PPC_85xx || PPC_86xx)
1108	help
1109	  Freescale MPC85xx/MPC86xx power management controller support
1110	  (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
1111
1112config PPC4xx_CPM
1113	bool
1114	default y
1115	depends on SUSPEND && (44x || 40x)
1116	help
1117	  PPC4xx Clock Power Management (CPM) support (suspend/resume).
1118	  It also enables support for two different idle states (idle-wait
1119	  and idle-doze).
1120
1121config 4xx_SOC
1122	bool
1123
1124config FSL_LBC
1125	bool "Freescale Local Bus support"
1126	help
1127	  Enables reporting of errors from the Freescale local bus
1128	  controller.  Also contains some common code used by
1129	  drivers for specific local bus peripherals.
1130
1131config FSL_GTM
1132	bool
1133	depends on PPC_83xx || QUICC_ENGINE || CPM2
1134	help
1135	  Freescale General-purpose Timers support
1136
1137config PCI_8260
1138	bool
1139	depends on PCI && 8260
1140	select PPC_INDIRECT_PCI
1141	default y
1142
1143config FSL_RIO
1144	bool "Freescale Embedded SRIO Controller support"
1145	depends on RAPIDIO = y && HAVE_RAPIDIO
1146	default "n"
1147	help
1148	  Include support for RapidIO controller on Freescale embedded
1149	  processors (MPC8548, MPC8641, etc).
1150
1151endmenu
1152
1153config NONSTATIC_KERNEL
1154	bool
1155
1156menu "Advanced setup"
1157	depends on PPC32
1158
1159config ADVANCED_OPTIONS
1160	bool "Prompt for advanced kernel configuration options"
1161	help
1162	  This option will enable prompting for a variety of advanced kernel
1163	  configuration options.  These options can cause the kernel to not
1164	  work if they are set incorrectly, but can be used to optimize certain
1165	  aspects of kernel memory management.
1166
1167	  Unless you know what you are doing, say N here.
1168
1169comment "Default settings for advanced configuration options are used"
1170	depends on !ADVANCED_OPTIONS
1171
1172config LOWMEM_SIZE_BOOL
1173	bool "Set maximum low memory"
1174	depends on ADVANCED_OPTIONS
1175	help
1176	  This option allows you to set the maximum amount of memory which
1177	  will be used as "low memory", that is, memory which the kernel can
1178	  access directly, without having to set up a kernel virtual mapping.
1179	  This can be useful in optimizing the layout of kernel virtual
1180	  memory.
1181
1182	  Say N here unless you know what you are doing.
1183
1184config LOWMEM_SIZE
1185	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1186	default "0x30000000"
1187
1188config LOWMEM_CAM_NUM_BOOL
1189	bool "Set number of CAMs to use to map low memory"
1190	depends on ADVANCED_OPTIONS && PPC_85xx
1191	help
1192	  This option allows you to set the maximum number of CAM slots that
1193	  will be used to map low memory.  There are a limited number of slots
1194	  available and even more limited number that will fit in the L1 MMU.
1195	  However, using more entries will allow mapping more low memory.  This
1196	  can be useful in optimizing the layout of kernel virtual memory.
1197
1198	  Say N here unless you know what you are doing.
1199
1200config LOWMEM_CAM_NUM
1201	depends on PPC_85xx
1202	int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1203	default 3 if !STRICT_KERNEL_RWX
1204	default 9 if DATA_SHIFT >= 24
1205	default 12 if DATA_SHIFT >= 22
1206	default 15
1207
1208config DYNAMIC_MEMSTART
1209	bool "Enable page aligned dynamic load address for kernel"
1210	depends on ADVANCED_OPTIONS && FLATMEM && (PPC_85xx || 44x)
1211	select NONSTATIC_KERNEL
1212	help
1213	  This option enables the kernel to be loaded at any page aligned
1214	  physical address. The kernel creates a mapping from KERNELBASE to
1215	  the address where the kernel is loaded. The page size here implies
1216	  the TLB page size of the mapping for kernel on the particular platform.
1217	  Please refer to the init code for finding the TLB page size.
1218
1219	  DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1220	  kernel image, where the only restriction is the page aligned kernel
1221	  load address. When this option is enabled, the compile time physical
1222	  address CONFIG_PHYSICAL_START is ignored.
1223
1224	  This option is overridden by CONFIG_RELOCATABLE
1225
1226config PAGE_OFFSET_BOOL
1227	bool "Set custom page offset address"
1228	depends on ADVANCED_OPTIONS
1229	help
1230	  This option allows you to set the kernel virtual address at which
1231	  the kernel will map low memory.  This can be useful in optimizing
1232	  the virtual memory layout of the system.
1233
1234	  Say N here unless you know what you are doing.
1235
1236config PAGE_OFFSET
1237	hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1238	default "0xc0000000"
1239
1240config KERNEL_START_BOOL
1241	bool "Set custom kernel base address"
1242	depends on ADVANCED_OPTIONS
1243	help
1244	  This option allows you to set the kernel virtual address at which
1245	  the kernel will be loaded.  Normally this should match PAGE_OFFSET
1246	  however there are times (like kdump) that one might not want them
1247	  to be the same.
1248
1249	  Say N here unless you know what you are doing.
1250
1251config KERNEL_START
1252	hex "Virtual address of kernel base" if KERNEL_START_BOOL
1253	default PAGE_OFFSET if PAGE_OFFSET_BOOL
1254	default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1255	default "0xc0000000"
1256
1257config PHYSICAL_START_BOOL
1258	bool "Set physical address where the kernel is loaded"
1259	depends on ADVANCED_OPTIONS && FLATMEM && PPC_85xx
1260	help
1261	  This gives the physical address where the kernel is loaded.
1262
1263	  Say N here unless you know what you are doing.
1264
1265config PHYSICAL_START
1266	hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1267	default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL
1268	default "0x00000000"
1269
1270config PHYSICAL_ALIGN
1271	hex
1272	default "0x04000000" if PPC_85xx
1273	help
1274	  This value puts the alignment restrictions on physical address
1275	  where kernel is loaded and run from. Kernel is compiled for an
1276	  address which meets above alignment restriction.
1277
1278config TASK_SIZE_BOOL
1279	bool "Set custom user task size"
1280	depends on ADVANCED_OPTIONS
1281	help
1282	  This option allows you to set the amount of virtual address space
1283	  allocated to user tasks.  This can be useful in optimizing the
1284	  virtual memory layout of the system.
1285
1286	  Say N here unless you know what you are doing.
1287
1288config TASK_SIZE
1289	hex "Size of user task space" if TASK_SIZE_BOOL
1290	default "0x80000000" if PPC_8xx
1291	default "0xb0000000" if PPC_BOOK3S_32
1292	default "0xc0000000"
1293endmenu
1294
1295if PPC64
1296# This value must have zeroes in the bottom 60 bits otherwise lots will break
1297config PAGE_OFFSET
1298	hex
1299	default "0xc000000000000000"
1300config KERNEL_START
1301	hex
1302	default "0xc000000000000000"
1303config PHYSICAL_START
1304	hex
1305	default "0x00000000"
1306endif
1307
1308config PPC_LIB_RHEAP
1309	bool
1310
1311source "arch/powerpc/kvm/Kconfig"
1312
1313source "kernel/livepatch/Kconfig"
1314