xref: /openbmc/linux/arch/powerpc/Kconfig (revision e7f127b2)
1# SPDX-License-Identifier: GPL-2.0
2source "arch/powerpc/platforms/Kconfig.cputype"
3
4config 32BIT
5	bool
6	default y if PPC32
7
8config 64BIT
9	bool
10	default y if PPC64
11
12config MMU
13	bool
14	default y
15
16config ARCH_MMAP_RND_BITS_MAX
17	# On Book3S 64, the default virtual address space for 64-bit processes
18	# is 2^47 (128TB). As a maximum, allow randomisation to consume up to
19	# 32T of address space (2^45), which should ensure a reasonable gap
20	# between bottom-up and top-down allocations for applications that
21	# consume "normal" amounts of address space. Book3S 64 only supports 64K
22	# and 4K page sizes.
23	default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K)
24	default 33 if PPC_BOOK3S_64		     # 33 = 45 (32T) - 12 (4K)
25	#
26	# On all other 64-bit platforms (currently only Book3E), the virtual
27	# address space is 2^46 (64TB). Allow randomisation to consume up to 16T
28	# of address space (2^44). Only 4K page sizes are supported.
29	default 32 if 64BIT	# 32 = 44 (16T) - 12 (4K)
30	#
31	# For 32-bit, use the compat values, as they're the same.
32	default ARCH_MMAP_RND_COMPAT_BITS_MAX
33
34config ARCH_MMAP_RND_BITS_MIN
35	# Allow randomisation to consume up to 1GB of address space (2^30).
36	default 14 if 64BIT && PPC_64K_PAGES	# 14 = 30 (1GB) - 16 (64K)
37	default 18 if 64BIT			# 18 = 30 (1GB) - 12 (4K)
38	#
39	# For 32-bit, use the compat values, as they're the same.
40	default ARCH_MMAP_RND_COMPAT_BITS_MIN
41
42config ARCH_MMAP_RND_COMPAT_BITS_MAX
43	# Total virtual address space for 32-bit processes is 2^31 (2GB).
44	# Allow randomisation to consume up to 512MB of address space (2^29).
45	default 11 if PPC_256K_PAGES	# 11 = 29 (512MB) - 18 (256K)
46	default 13 if PPC_64K_PAGES	# 13 = 29 (512MB) - 16 (64K)
47	default 15 if PPC_16K_PAGES	# 15 = 29 (512MB) - 14 (16K)
48	default 17			# 17 = 29 (512MB) - 12 (4K)
49
50config ARCH_MMAP_RND_COMPAT_BITS_MIN
51	# Total virtual address space for 32-bit processes is 2^31 (2GB).
52	# Allow randomisation to consume up to 8MB of address space (2^23).
53	default 5 if PPC_256K_PAGES	#  5 = 23 (8MB) - 18 (256K)
54	default 7 if PPC_64K_PAGES	#  7 = 23 (8MB) - 16 (64K)
55	default 9 if PPC_16K_PAGES	#  9 = 23 (8MB) - 14 (16K)
56	default 11			# 11 = 23 (8MB) - 12 (4K)
57
58config NR_IRQS
59	int "Number of virtual interrupt numbers"
60	range 32 1048576
61	default "512"
62	help
63	  This defines the number of virtual interrupt numbers the kernel
64	  can manage. Virtual interrupt numbers are what you see in
65	  /proc/interrupts. If you configure your system to have too few,
66	  drivers will fail to load or worse - handle with care.
67
68config NMI_IPI
69	bool
70	depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR)
71	default y
72
73config PPC_WATCHDOG
74	bool
75	depends on HARDLOCKUP_DETECTOR
76	depends on HAVE_HARDLOCKUP_DETECTOR_ARCH
77	default y
78	help
79	  This is a placeholder when the powerpc hardlockup detector
80	  watchdog is selected (arch/powerpc/kernel/watchdog.c). It is
81	  selected via the generic lockup detector menu which is why we
82	  have no standalone config option for it here.
83
84config STACKTRACE_SUPPORT
85	bool
86	default y
87
88config LOCKDEP_SUPPORT
89	bool
90	default y
91
92config GENERIC_LOCKBREAK
93	bool
94	default y
95	depends on SMP && PREEMPTION
96
97config GENERIC_HWEIGHT
98	bool
99	default y
100
101config PPC
102	bool
103	default y
104	#
105	# Please keep this list sorted alphabetically.
106	#
107	select ARCH_32BIT_OFF_T if PPC32
108	select ARCH_ENABLE_MEMORY_HOTPLUG
109	select ARCH_ENABLE_MEMORY_HOTREMOVE
110	select ARCH_HAS_COPY_MC			if PPC64
111	select ARCH_HAS_DEBUG_VIRTUAL
112	select ARCH_HAS_DEBUG_VM_PGTABLE
113	select ARCH_HAS_DEBUG_WX		if STRICT_KERNEL_RWX
114	select ARCH_HAS_DEVMEM_IS_ALLOWED
115	select ARCH_HAS_DMA_MAP_DIRECT 		if PPC_PSERIES
116	select ARCH_HAS_ELF_RANDOMIZE
117	select ARCH_HAS_FORTIFY_SOURCE
118	select ARCH_HAS_GCOV_PROFILE_ALL
119	select ARCH_HAS_HUGEPD			if HUGETLB_PAGE
120	select ARCH_HAS_KCOV
121	select ARCH_HAS_MEMBARRIER_CALLBACKS
122	select ARCH_HAS_MEMBARRIER_SYNC_CORE
123	select ARCH_HAS_MEMREMAP_COMPAT_ALIGN	if PPC_64S_HASH_MMU
124	select ARCH_HAS_MMIOWB			if PPC64
125	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
126	select ARCH_HAS_PHYS_TO_DMA
127	select ARCH_HAS_PMEM_API
128	select ARCH_HAS_PTE_DEVMAP		if PPC_BOOK3S_64
129	select ARCH_HAS_PTE_SPECIAL
130	select ARCH_HAS_SCALED_CPUTIME		if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
131	select ARCH_HAS_SET_MEMORY
132	select ARCH_HAS_STRICT_KERNEL_RWX	if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION
133	select ARCH_HAS_STRICT_KERNEL_RWX	if FSL_BOOKE && !HIBERNATION && !RANDOMIZE_BASE
134	select ARCH_HAS_STRICT_MODULE_RWX	if ARCH_HAS_STRICT_KERNEL_RWX && !PPC_BOOK3S_32
135	select ARCH_HAS_TICK_BROADCAST		if GENERIC_CLOCKEVENTS_BROADCAST
136	select ARCH_HAS_UACCESS_FLUSHCACHE
137	select ARCH_HAS_UBSAN_SANITIZE_ALL
138	select ARCH_HAVE_NMI_SAFE_CMPXCHG
139	select ARCH_KEEP_MEMBLOCK
140	select ARCH_MIGHT_HAVE_PC_PARPORT
141	select ARCH_MIGHT_HAVE_PC_SERIO
142	select ARCH_OPTIONAL_KERNEL_RWX		if ARCH_HAS_STRICT_KERNEL_RWX
143	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
144	select ARCH_STACKWALK
145	select ARCH_SUPPORTS_ATOMIC_RMW
146	select ARCH_SUPPORTS_DEBUG_PAGEALLOC	if PPC_BOOK3S || PPC_8xx || 40x
147	select ARCH_USE_BUILTIN_BSWAP
148	select ARCH_USE_CMPXCHG_LOCKREF		if PPC64
149	select ARCH_USE_MEMTEST
150	select ARCH_USE_QUEUED_RWLOCKS		if PPC_QUEUED_SPINLOCKS
151	select ARCH_USE_QUEUED_SPINLOCKS	if PPC_QUEUED_SPINLOCKS
152	select ARCH_WANT_IPC_PARSE_VERSION
153	select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
154	select ARCH_WANT_LD_ORPHAN_WARN
155	select ARCH_WEAK_RELEASE_ACQUIRE
156	select BINFMT_ELF
157	select BUILDTIME_TABLE_SORT
158	select CLONE_BACKWARDS
159	select CPUMASK_OFFSTACK			if NR_CPUS >= 8192
160	select DCACHE_WORD_ACCESS		if PPC64 && CPU_LITTLE_ENDIAN
161	select DMA_OPS_BYPASS			if PPC64
162	select DMA_OPS				if PPC64
163	select DYNAMIC_FTRACE			if FUNCTION_TRACER
164	select EDAC_ATOMIC_SCRUB
165	select EDAC_SUPPORT
166	select GENERIC_ATOMIC64			if PPC32
167	select GENERIC_CLOCKEVENTS_BROADCAST	if SMP
168	select GENERIC_CMOS_UPDATE
169	select GENERIC_CPU_AUTOPROBE
170	select GENERIC_CPU_VULNERABILITIES	if PPC_BARRIER_NOSPEC
171	select GENERIC_EARLY_IOREMAP
172	select GENERIC_GETTIMEOFDAY
173	select GENERIC_IRQ_SHOW
174	select GENERIC_IRQ_SHOW_LEVEL
175	select GENERIC_PCI_IOMAP		if PCI
176	select GENERIC_PTDUMP
177	select GENERIC_SMP_IDLE_THREAD
178	select GENERIC_TIME_VSYSCALL
179	select GENERIC_VDSO_TIME_NS
180	select HAVE_ARCH_AUDITSYSCALL
181	select HAVE_ARCH_HUGE_VMALLOC		if HAVE_ARCH_HUGE_VMAP
182	select HAVE_ARCH_HUGE_VMAP		if PPC_RADIX_MMU || PPC_8xx
183	select HAVE_ARCH_JUMP_LABEL
184	select HAVE_ARCH_JUMP_LABEL_RELATIVE
185	select HAVE_ARCH_KASAN			if PPC32 && PPC_PAGE_SHIFT <= 14
186	select HAVE_ARCH_KASAN_VMALLOC		if PPC32 && PPC_PAGE_SHIFT <= 14
187	select HAVE_ARCH_KFENCE			if PPC_BOOK3S_32 || PPC_8xx || 40x
188	select HAVE_ARCH_KGDB
189	select HAVE_ARCH_MMAP_RND_BITS
190	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if COMPAT
191	select HAVE_ARCH_NVRAM_OPS
192	select HAVE_ARCH_SECCOMP_FILTER
193	select HAVE_ARCH_TRACEHOOK
194	select HAVE_ASM_MODVERSIONS
195	select HAVE_CONTEXT_TRACKING		if PPC64
196	select HAVE_C_RECORDMCOUNT
197	select HAVE_DEBUG_KMEMLEAK
198	select HAVE_DEBUG_STACKOVERFLOW
199	select HAVE_DYNAMIC_FTRACE
200	select HAVE_DYNAMIC_FTRACE_WITH_REGS	if MPROFILE_KERNEL || PPC32
201	select HAVE_EBPF_JIT
202	select HAVE_EFFICIENT_UNALIGNED_ACCESS	if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
203	select HAVE_FAST_GUP
204	select HAVE_FTRACE_MCOUNT_RECORD
205	select HAVE_FUNCTION_ERROR_INJECTION
206	select HAVE_FUNCTION_GRAPH_TRACER
207	select HAVE_FUNCTION_TRACER
208	select HAVE_GCC_PLUGINS			if GCC_VERSION >= 50200   # plugin support on gcc <= 5.1 is buggy on PPC
209	select HAVE_GENERIC_VDSO
210	select HAVE_HARDLOCKUP_DETECTOR_ARCH	if PPC_BOOK3S_64 && SMP
211	select HAVE_HARDLOCKUP_DETECTOR_PERF	if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH
212	select HAVE_HW_BREAKPOINT		if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
213	select HAVE_IOREMAP_PROT
214	select HAVE_IRQ_EXIT_ON_IRQ_STACK
215	select HAVE_IRQ_TIME_ACCOUNTING
216	select HAVE_KERNEL_GZIP
217	select HAVE_KERNEL_LZMA			if DEFAULT_UIMAGE
218	select HAVE_KERNEL_LZO			if DEFAULT_UIMAGE
219	select HAVE_KERNEL_XZ			if PPC_BOOK3S || 44x
220	select HAVE_KPROBES
221	select HAVE_KPROBES_ON_FTRACE
222	select HAVE_KRETPROBES
223	select HAVE_LD_DEAD_CODE_DATA_ELIMINATION
224	select HAVE_LIVEPATCH			if HAVE_DYNAMIC_FTRACE_WITH_REGS && PPC64
225	select HAVE_MOD_ARCH_SPECIFIC
226	select HAVE_NMI				if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
227	select HAVE_OPTPROBES
228	select HAVE_PERF_EVENTS
229	select HAVE_PERF_EVENTS_NMI		if PPC64
230	select HAVE_PERF_REGS
231	select HAVE_PERF_USER_STACK_DUMP
232	select HAVE_REGS_AND_STACK_ACCESS_API
233	select HAVE_RELIABLE_STACKTRACE
234	select HAVE_RSEQ
235	select HAVE_SETUP_PER_CPU_AREA		if PPC64
236	select HAVE_SOFTIRQ_ON_OWN_STACK
237	select HAVE_STACKPROTECTOR		if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
238	select HAVE_STACKPROTECTOR		if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
239	select HAVE_STATIC_CALL			if PPC32
240	select HAVE_SYSCALL_TRACEPOINTS
241	select HAVE_VIRT_CPU_ACCOUNTING
242	select HUGETLB_PAGE_SIZE_VARIABLE	if PPC_BOOK3S_64 && HUGETLB_PAGE
243	select IOMMU_HELPER			if PPC64
244	select IRQ_DOMAIN
245	select IRQ_FORCED_THREADING
246	select MMU_GATHER_PAGE_SIZE
247	select MMU_GATHER_RCU_TABLE_FREE
248	select MODULES_USE_ELF_RELA
249	select NEED_DMA_MAP_STATE		if PPC64 || NOT_COHERENT_CACHE
250	select NEED_PER_CPU_EMBED_FIRST_CHUNK	if PPC64
251	select NEED_PER_CPU_PAGE_FIRST_CHUNK	if PPC64
252	select NEED_SG_DMA_LENGTH
253	select OF
254	select OF_DMA_DEFAULT_COHERENT		if !NOT_COHERENT_CACHE
255	select OF_EARLY_FLATTREE
256	select OLD_SIGACTION			if PPC32
257	select OLD_SIGSUSPEND
258	select PCI_DOMAINS			if PCI
259	select PCI_MSI_ARCH_FALLBACKS		if PCI_MSI
260	select PCI_SYSCALL			if PCI
261	select PPC_DAWR				if PPC64
262	select RTC_LIB
263	select SPARSE_IRQ
264	select STRICT_KERNEL_RWX if STRICT_MODULE_RWX
265	select SYSCTL_EXCEPTION_TRACE
266	select THREAD_INFO_IN_TASK
267	select TRACE_IRQFLAGS_SUPPORT
268	select VIRT_TO_BUS			if !PPC64
269	#
270	# Please keep this list sorted alphabetically.
271	#
272
273config PPC_BARRIER_NOSPEC
274	bool
275	default y
276	depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E
277
278config EARLY_PRINTK
279	bool
280	default y
281
282config PANIC_TIMEOUT
283	int
284	default 180
285
286config COMPAT
287	bool "Enable support for 32bit binaries"
288	depends on PPC64
289	depends on !CC_IS_CLANG || CLANG_VERSION >= 120000
290	default y if !CPU_LITTLE_ENDIAN
291	select ARCH_WANT_OLD_COMPAT_IPC
292	select COMPAT_OLD_SIGACTION
293
294config SYSVIPC_COMPAT
295	bool
296	depends on COMPAT && SYSVIPC
297	default y
298
299config SCHED_OMIT_FRAME_POINTER
300	bool
301	default y
302
303config ARCH_MAY_HAVE_PC_FDC
304	bool
305	default PCI
306
307config PPC_UDBG_16550
308	bool
309
310config GENERIC_TBSYNC
311	bool
312	default y if PPC32 && SMP
313
314config AUDIT_ARCH
315	bool
316	default y
317
318config GENERIC_BUG
319	bool
320	default y
321	depends on BUG
322
323config GENERIC_BUG_RELATIVE_POINTERS
324	def_bool y
325	depends on GENERIC_BUG
326
327config SYS_SUPPORTS_APM_EMULATION
328	default y if PMAC_APM_EMU
329	bool
330
331config EPAPR_BOOT
332	bool
333	help
334	  Used to allow a board to specify it wants an ePAPR compliant wrapper.
335
336config DEFAULT_UIMAGE
337	bool
338	help
339	  Used to allow a board to specify it wants a uImage built by default
340
341config ARCH_HIBERNATION_POSSIBLE
342	bool
343	default y
344
345config ARCH_SUSPEND_POSSIBLE
346	def_bool y
347	depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
348		   (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
349		   || 44x || 40x
350
351config ARCH_SUSPEND_NONZERO_CPU
352	def_bool y
353	depends on PPC_POWERNV || PPC_PSERIES
354
355config PPC_DCR_NATIVE
356	bool
357
358config PPC_DCR_MMIO
359	bool
360
361config PPC_DCR
362	bool
363	depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
364	default y
365
366config PPC_OF_PLATFORM_PCI
367	bool
368	depends on PCI
369	depends on PPC64 # not supported on 32 bits yet
370
371config ARCH_SUPPORTS_UPROBES
372	def_bool y
373
374config PPC_ADV_DEBUG_REGS
375	bool
376	depends on 40x || BOOKE
377	default y
378
379config PPC_ADV_DEBUG_IACS
380	int
381	depends on PPC_ADV_DEBUG_REGS
382	default 4 if 44x
383	default 2
384
385config PPC_ADV_DEBUG_DACS
386	int
387	depends on PPC_ADV_DEBUG_REGS
388	default 2
389
390config PPC_ADV_DEBUG_DVCS
391	int
392	depends on PPC_ADV_DEBUG_REGS
393	default 2 if 44x
394	default 0
395
396config PPC_ADV_DEBUG_DAC_RANGE
397	bool
398	depends on PPC_ADV_DEBUG_REGS && 44x
399	default y
400
401config PPC_DAWR
402	bool
403
404config PGTABLE_LEVELS
405	int
406	default 2 if !PPC64
407	default 4
408
409source "arch/powerpc/sysdev/Kconfig"
410source "arch/powerpc/platforms/Kconfig"
411
412menu "Kernel options"
413
414config HIGHMEM
415	bool "High memory support"
416	depends on PPC32
417	select KMAP_LOCAL
418
419source "kernel/Kconfig.hz"
420
421config MATH_EMULATION
422	bool "Math emulation"
423	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
424	select PPC_FPU_REGS
425	help
426	  Some PowerPC chips designed for embedded applications do not have
427	  a floating-point unit and therefore do not implement the
428	  floating-point instructions in the PowerPC instruction set.  If you
429	  say Y here, the kernel will include code to emulate a floating-point
430	  unit, which will allow programs that use floating-point
431	  instructions to run.
432
433	  This is also useful to emulate missing (optional) instructions
434	  such as fsqrt on cores that do have an FPU but do not implement
435	  them (such as Freescale BookE).
436
437choice
438	prompt "Math emulation options"
439	default MATH_EMULATION_FULL
440	depends on MATH_EMULATION
441
442config	MATH_EMULATION_FULL
443	bool "Emulate all the floating point instructions"
444	help
445	  Select this option will enable the kernel to support to emulate
446	  all the floating point instructions. If your SoC doesn't have
447	  a FPU, you should select this.
448
449config MATH_EMULATION_HW_UNIMPLEMENTED
450	bool "Just emulate the FPU unimplemented instructions"
451	help
452	  Select this if you know there does have a hardware FPU on your
453	  SoC, but some floating point instructions are not implemented by that.
454
455endchoice
456
457config PPC_TRANSACTIONAL_MEM
458	bool "Transactional Memory support for POWERPC"
459	depends on PPC_BOOK3S_64
460	depends on SMP
461	select ALTIVEC
462	select VSX
463	help
464	  Support user-mode Transactional Memory on POWERPC.
465
466config PPC_UV
467	bool "Ultravisor support"
468	depends on KVM_BOOK3S_HV_POSSIBLE
469	depends on DEVICE_PRIVATE
470	default n
471	help
472	  This option paravirtualizes the kernel to run in POWER platforms that
473	  supports the Protected Execution Facility (PEF). On such platforms,
474	  the ultravisor firmware runs at a privilege level above the
475	  hypervisor.
476
477	  If unsure, say "N".
478
479config LD_HEAD_STUB_CATCH
480	bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
481	depends on PPC64
482	help
483	  Very large kernels can cause linker branch stubs to be generated by
484	  code in head_64.S, which moves the head text sections out of their
485	  specified location. This option can work around the problem.
486
487	  If unsure, say "N".
488
489config MPROFILE_KERNEL
490	depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER
491	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__)
492
493config HOTPLUG_CPU
494	bool "Support for enabling/disabling CPUs"
495	depends on SMP && (PPC_PSERIES || \
496		PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
497	help
498	  Say Y here to be able to disable and re-enable individual
499	  CPUs at runtime on SMP machines.
500
501	  Say N if you are unsure.
502
503config PPC_QUEUED_SPINLOCKS
504	bool "Queued spinlocks" if EXPERT
505	depends on SMP
506	default PPC_BOOK3S_64
507	help
508	  Say Y here to use queued spinlocks which give better scalability and
509	  fairness on large SMP and NUMA systems without harming single threaded
510	  performance.
511
512config ARCH_CPU_PROBE_RELEASE
513	def_bool y
514	depends on HOTPLUG_CPU
515
516config PPC64_SUPPORTS_MEMORY_FAILURE
517	bool "Add support for memory hwpoison"
518	depends on PPC_BOOK3S_64
519	default "y" if PPC_POWERNV
520	select ARCH_SUPPORTS_MEMORY_FAILURE
521
522config KEXEC
523	bool "kexec system call"
524	depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
525	select KEXEC_CORE
526	help
527	  kexec is a system call that implements the ability to shutdown your
528	  current kernel, and to start another kernel.  It is like a reboot
529	  but it is independent of the system firmware.   And like a reboot
530	  you can start any kernel with it, not just Linux.
531
532	  The name comes from the similarity to the exec system call.
533
534	  It is an ongoing process to be certain the hardware in a machine
535	  is properly shutdown, so do not be surprised if this code does not
536	  initially work for you.  As of this writing the exact hardware
537	  interface is strongly in flux, so no good recommendation can be
538	  made.
539
540config KEXEC_FILE
541	bool "kexec file based system call"
542	select KEXEC_CORE
543	select HAVE_IMA_KEXEC if IMA
544	select BUILD_BIN2C
545	select KEXEC_ELF
546	depends on PPC64
547	depends on CRYPTO=y
548	depends on CRYPTO_SHA256=y
549	help
550	  This is a new version of the kexec system call. This call is
551	  file based and takes in file descriptors as system call arguments
552	  for kernel and initramfs as opposed to a list of segments as is the
553	  case for the older kexec call.
554
555config ARCH_HAS_KEXEC_PURGATORY
556	def_bool KEXEC_FILE
557
558config RELOCATABLE
559	bool "Build a relocatable kernel"
560	depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE))
561	select NONSTATIC_KERNEL
562	select MODULE_REL_CRCS if MODVERSIONS
563	help
564	  This builds a kernel image that is capable of running at the
565	  location the kernel is loaded at. For ppc32, there is no any
566	  alignment restrictions, and this feature is a superset of
567	  DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
568	  16k-aligned base address. The kernel is linked as a
569	  position-independent executable (PIE) and contains dynamic relocations
570	  which are processed early in the bootup process.
571
572	  One use is for the kexec on panic case where the recovery kernel
573	  must live at a different physical address than the primary
574	  kernel.
575
576	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
577	  it has been loaded at and the compile time physical addresses
578	  CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
579	  setting can still be useful to bootwrappers that need to know the
580	  load address of the kernel (eg. u-boot/mkimage).
581
582config RANDOMIZE_BASE
583	bool "Randomize the address of the kernel image"
584	depends on (FSL_BOOKE && FLATMEM && PPC32)
585	depends on RELOCATABLE
586	help
587	  Randomizes the virtual address at which the kernel image is
588	  loaded, as a security feature that deters exploit attempts
589	  relying on knowledge of the location of kernel internals.
590
591	  If unsure, say Y.
592
593config RELOCATABLE_TEST
594	bool "Test relocatable kernel"
595	depends on (PPC64 && RELOCATABLE)
596	help
597	  This runs the relocatable kernel at the address it was initially
598	  loaded at, which tends to be non-zero and therefore test the
599	  relocation code.
600
601config CRASH_DUMP
602	bool "Build a dump capture kernel"
603	depends on PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP)
604	select RELOCATABLE if PPC64 || 44x || FSL_BOOKE
605	help
606	  Build a kernel suitable for use as a dump capture kernel.
607	  The same kernel binary can be used as production kernel and dump
608	  capture kernel.
609
610config FA_DUMP
611	bool "Firmware-assisted dump"
612	depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
613	select CRASH_CORE
614	select CRASH_DUMP
615	help
616	  A robust mechanism to get reliable kernel crash dump with
617	  assistance from firmware. This approach does not use kexec,
618	  instead firmware assists in booting the capture kernel
619	  while preserving memory contents. Firmware-assisted dump
620	  is meant to be a kdump replacement offering robustness and
621	  speed not possible without system firmware assistance.
622
623	  If unsure, say "y". Only special kernels like petitboot may
624	  need to say "N" here.
625
626config PRESERVE_FA_DUMP
627	bool "Preserve Firmware-assisted dump"
628	depends on PPC64 && PPC_POWERNV && !FA_DUMP
629	help
630	  On a kernel with FA_DUMP disabled, this option helps to preserve
631	  crash data from a previously crash'ed kernel. Useful when the next
632	  memory preserving kernel boot would process this crash data.
633	  Petitboot kernel is the typical usecase for this option.
634
635config OPAL_CORE
636	bool "Export OPAL memory as /sys/firmware/opal/core"
637	depends on PPC64 && PPC_POWERNV
638	help
639	  This option uses the MPIPL support in firmware to provide an
640	  ELF core of OPAL memory after a crash. The ELF core is exported
641	  as /sys/firmware/opal/core file which is helpful in debugging
642	  OPAL crashes using GDB.
643
644config IRQ_ALL_CPUS
645	bool "Distribute interrupts on all CPUs by default"
646	depends on SMP
647	help
648	  This option gives the kernel permission to distribute IRQs across
649	  multiple CPUs.  Saying N here will route all IRQs to the first
650	  CPU.  Generally saying Y is safe, although some problems have been
651	  reported with SMP Power Macintoshes with this option enabled.
652
653config NUMA
654	bool "NUMA Memory Allocation and Scheduler Support"
655	depends on PPC64 && SMP
656	default y if PPC_PSERIES || PPC_POWERNV
657	select USE_PERCPU_NUMA_NODE_ID
658	help
659	  Enable NUMA (Non-Uniform Memory Access) support.
660
661	  The kernel will try to allocate memory used by a CPU on the
662	  local memory controller of the CPU and add some more
663	  NUMA awareness to the kernel.
664
665config NODES_SHIFT
666	int
667	default "8" if PPC64
668	default "4"
669	depends on NUMA
670
671config HAVE_MEMORYLESS_NODES
672	def_bool y
673	depends on NUMA
674
675config ARCH_SELECT_MEMORY_MODEL
676	def_bool y
677	depends on PPC64
678
679config ARCH_FLATMEM_ENABLE
680	def_bool y
681	depends on (PPC64 && !NUMA) || PPC32
682
683config ARCH_SPARSEMEM_ENABLE
684	def_bool y
685	depends on PPC64
686	select SPARSEMEM_VMEMMAP_ENABLE
687
688config ARCH_SPARSEMEM_DEFAULT
689	def_bool y
690	depends on PPC_BOOK3S_64
691
692config ILLEGAL_POINTER_VALUE
693	hex
694	# This is roughly half way between the top of user space and the bottom
695	# of kernel space, which seems about as good as we can get.
696	default 0x5deadbeef0000000 if PPC64
697	default 0
698
699config ARCH_MEMORY_PROBE
700	def_bool y
701	depends on MEMORY_HOTPLUG
702
703choice
704	prompt "Page size"
705	default PPC_64K_PAGES if PPC_BOOK3S_64
706	default PPC_4K_PAGES
707	help
708	  Select the kernel logical page size. Increasing the page size
709	  will reduce software overhead at each page boundary, allow
710	  hardware prefetch mechanisms to be more effective, and allow
711	  larger dma transfers increasing IO efficiency and reducing
712	  overhead. However the utilization of memory will increase.
713	  For example, each cached file will using a multiple of the
714	  page size to hold its contents and the difference between the
715	  end of file and the end of page is wasted.
716
717	  Some dedicated systems, such as software raid serving with
718	  accelerated calculations, have shown significant increases.
719
720	  If you configure a 64 bit kernel for 64k pages but the
721	  processor does not support them, then the kernel will simulate
722	  them with 4k pages, loading them on demand, but with the
723	  reduced software overhead and larger internal fragmentation.
724	  For the 32 bit kernel, a large page option will not be offered
725	  unless it is supported by the configured processor.
726
727	  If unsure, choose 4K_PAGES.
728
729config PPC_4K_PAGES
730	bool "4k page size"
731	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
732
733config PPC_16K_PAGES
734	bool "16k page size"
735	depends on 44x || PPC_8xx
736
737config PPC_64K_PAGES
738	bool "64k page size"
739	depends on 44x || PPC_BOOK3S_64
740	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
741
742config PPC_256K_PAGES
743	bool "256k page size (Requires non-standard binutils settings)"
744	depends on 44x && !PPC_47x
745	help
746	  Make the page size 256k.
747
748	  The kernel will only be able to run applications that have been
749	  compiled with '-zmax-page-size' set to 256K (the default is 64K) using
750	  binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE
751	  definition from 0x10000 to 0x40000 in older versions.
752
753endchoice
754
755config PPC_PAGE_SHIFT
756	int
757	default 18 if PPC_256K_PAGES
758	default 16 if PPC_64K_PAGES
759	default 14 if PPC_16K_PAGES
760	default 12
761
762config THREAD_SHIFT
763	int "Thread shift" if EXPERT
764	range 13 15
765	default "15" if PPC_256K_PAGES
766	default "14" if PPC64
767	default "14" if KASAN
768	default "13"
769	help
770	  Used to define the stack size. The default is almost always what you
771	  want. Only change this if you know what you are doing.
772
773config DATA_SHIFT_BOOL
774	bool "Set custom data alignment"
775	depends on ADVANCED_OPTIONS
776	depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE
777	depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \
778		   FSL_BOOKE
779	help
780	  This option allows you to set the kernel data alignment. When
781	  RAM is mapped by blocks, the alignment needs to fit the size and
782	  number of possible blocks. The default should be OK for most configs.
783
784	  Say N here unless you know what you are doing.
785
786config DATA_SHIFT
787	int "Data shift" if DATA_SHIFT_BOOL
788	default 24 if STRICT_KERNEL_RWX && PPC64
789	range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
790	range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
791	range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_FSL_BOOKE
792	default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
793	default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
794	default 23 if STRICT_KERNEL_RWX && PPC_8xx
795	default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA
796	default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
797	default 24 if STRICT_KERNEL_RWX && FSL_BOOKE
798	default PPC_PAGE_SHIFT
799	help
800	  On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO.
801	  Smaller is the alignment, greater is the number of necessary DBATs.
802
803	  On 8xx, large pages (512kb or 8M) are used to map kernel linear
804	  memory. Aligning to 8M reduces TLB misses as only 8M pages are used
805	  in that case. If PIN_TLB is selected, it must be aligned to 8M as
806	  8M pages will be pinned.
807
808config FORCE_MAX_ZONEORDER
809	int "Maximum zone order"
810	range 8 9 if PPC64 && PPC_64K_PAGES
811	default "9" if PPC64 && PPC_64K_PAGES
812	range 13 13 if PPC64 && !PPC_64K_PAGES
813	default "13" if PPC64 && !PPC_64K_PAGES
814	range 9 64 if PPC32 && PPC_16K_PAGES
815	default "9" if PPC32 && PPC_16K_PAGES
816	range 7 64 if PPC32 && PPC_64K_PAGES
817	default "7" if PPC32 && PPC_64K_PAGES
818	range 5 64 if PPC32 && PPC_256K_PAGES
819	default "5" if PPC32 && PPC_256K_PAGES
820	range 11 64
821	default "11"
822	help
823	  The kernel memory allocator divides physically contiguous memory
824	  blocks into "zones", where each zone is a power of two number of
825	  pages.  This option selects the largest power of two that the kernel
826	  keeps in the memory allocator.  If you need to allocate very large
827	  blocks of physically contiguous memory, then you may need to
828	  increase this value.
829
830	  This config option is actually maximum order plus one. For example,
831	  a value of 11 means that the largest free memory block is 2^10 pages.
832
833	  The page size is not necessarily 4KB.  For example, on 64-bit
834	  systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
835	  this in mind when choosing a value for this option.
836
837config PPC_SUBPAGE_PROT
838	bool "Support setting protections for 4k subpages (subpage_prot syscall)"
839	default n
840	depends on PPC_64S_HASH_MMU && PPC_64K_PAGES
841	help
842	  This option adds support for system call to allow user programs
843	  to set access permissions (read/write, readonly, or no access)
844	  on the 4k subpages of each 64k page.
845
846	  If unsure, say N here.
847
848config PPC_PROT_SAO_LPAR
849	bool "Support PROT_SAO mappings in LPARs"
850	depends on PPC_BOOK3S_64
851	help
852	  This option adds support for PROT_SAO mappings from userspace
853	  inside LPARs on supported CPUs.
854
855	  This may cause issues when performing guest migration from
856	  a CPU that supports SAO to one that does not.
857
858	  If unsure, say N here.
859
860config PPC_COPRO_BASE
861	bool
862
863config SCHED_SMT
864	bool "SMT (Hyperthreading) scheduler support"
865	depends on PPC64 && SMP
866	help
867	  SMT scheduler support improves the CPU scheduler's decision making
868	  when dealing with POWER5 cpus at a cost of slightly increased
869	  overhead in some places. If unsure say N here.
870
871config PPC_DENORMALISATION
872	bool "PowerPC denormalisation exception handling"
873	depends on PPC_BOOK3S_64
874	default "y" if PPC_POWERNV
875	help
876	  Add support for handling denormalisation of single precision
877	  values.  Useful for bare metal only.  If unsure say Y here.
878
879config CMDLINE
880	string "Initial kernel command string"
881	default ""
882	help
883	  On some platforms, there is currently no way for the boot loader to
884	  pass arguments to the kernel. For these platforms, you can supply
885	  some command-line options at build time by entering them here.  In
886	  most cases you will need to specify the root device here.
887
888choice
889	prompt "Kernel command line type" if CMDLINE != ""
890	default CMDLINE_FROM_BOOTLOADER
891
892config CMDLINE_FROM_BOOTLOADER
893	bool "Use bootloader kernel arguments if available"
894	help
895	  Uses the command-line options passed by the boot loader. If
896	  the boot loader doesn't provide any, the default kernel command
897	  string provided in CMDLINE will be used.
898
899config CMDLINE_EXTEND
900	bool "Extend bootloader kernel arguments"
901	help
902	  The command-line arguments provided by the boot loader will be
903	  appended to the default kernel command string.
904
905config CMDLINE_FORCE
906	bool "Always use the default kernel command string"
907	help
908	  Always use the default kernel command string, even if the boot
909	  loader passes other arguments to the kernel.
910	  This is useful if you cannot or don't want to change the
911	  command-line options your boot loader passes to the kernel.
912
913endchoice
914
915config EXTRA_TARGETS
916	string "Additional default image types"
917	help
918	  List additional targets to be built by the bootwrapper here (separated
919	  by spaces).  This is useful for targets that depend of device tree
920	  files in the .dts directory.
921
922	  Targets in this list will be build as part of the default build
923	  target, or when the user does a 'make zImage' or a
924	  'make zImage.initrd'.
925
926	  If unsure, leave blank
927
928config ARCH_WANTS_FREEZER_CONTROL
929	def_bool y
930	depends on ADB_PMU
931
932source "kernel/power/Kconfig"
933
934config PPC_MEM_KEYS
935	prompt "PowerPC Memory Protection Keys"
936	def_bool y
937	depends on PPC_BOOK3S_64
938	depends on PPC_64S_HASH_MMU
939	select ARCH_USES_HIGH_VMA_FLAGS
940	select ARCH_HAS_PKEYS
941	help
942	  Memory Protection Keys provides a mechanism for enforcing
943	  page-based protections, but without requiring modification of the
944	  page tables when an application changes protection domains.
945
946	  For details, see Documentation/core-api/protection-keys.rst
947
948	  If unsure, say y.
949
950config PPC_SECURE_BOOT
951	prompt "Enable secure boot support"
952	bool
953	depends on PPC_POWERNV || PPC_PSERIES
954	depends on IMA_ARCH_POLICY
955	imply IMA_SECURE_AND_OR_TRUSTED_BOOT
956	help
957	  Systems with firmware secure boot enabled need to define security
958	  policies to extend secure boot to the OS. This config allows a user
959	  to enable OS secure boot on systems that have firmware support for
960	  it. If in doubt say N.
961
962config PPC_SECVAR_SYSFS
963	bool "Enable sysfs interface for POWER secure variables"
964	default y
965	depends on PPC_SECURE_BOOT
966	depends on SYSFS
967	help
968	  POWER secure variables are managed and controlled by firmware.
969	  These variables are exposed to userspace via sysfs to enable
970	  read/write operations on these variables. Say Y if you have
971	  secure boot enabled and want to expose variables to userspace.
972
973config PPC_RTAS_FILTER
974	bool "Enable filtering of RTAS syscalls"
975	default y
976	depends on PPC_RTAS
977	help
978	  The RTAS syscall API has security issues that could be used to
979	  compromise system integrity. This option enforces restrictions on the
980	  RTAS calls and arguments passed by userspace programs to mitigate
981	  these issues.
982
983	  Say Y unless you know what you are doing and the filter is causing
984	  problems for you.
985
986endmenu
987
988config ISA_DMA_API
989	bool
990	default PCI
991
992menu "Bus options"
993
994config ISA
995	bool "Support for ISA-bus hardware"
996	depends on PPC_CHRP
997	select PPC_I8259
998	help
999	  Find out whether you have ISA slots on your motherboard.  ISA is the
1000	  name of a bus system, i.e. the way the CPU talks to the other stuff
1001	  inside your box.  If you have an Apple machine, say N here; if you
1002	  have an IBM RS/6000 or pSeries machine, say Y.  If you have an
1003	  embedded board, consult your board documentation.
1004
1005config GENERIC_ISA_DMA
1006	bool
1007	depends on ISA_DMA_API
1008	default y
1009
1010config PPC_INDIRECT_PCI
1011	bool
1012	depends on PCI
1013	default y if 40x || 44x
1014
1015config SBUS
1016	bool
1017
1018config FSL_SOC
1019	bool
1020
1021config FSL_PCI
1022	bool
1023	select ARCH_HAS_DMA_SET_MASK
1024	select PPC_INDIRECT_PCI
1025	select PCI_QUIRKS
1026
1027config FSL_PMC
1028	bool
1029	default y
1030	depends on SUSPEND && (PPC_85xx || PPC_86xx)
1031	help
1032	  Freescale MPC85xx/MPC86xx power management controller support
1033	  (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
1034
1035config PPC4xx_CPM
1036	bool
1037	default y
1038	depends on SUSPEND && (44x || 40x)
1039	help
1040	  PPC4xx Clock Power Management (CPM) support (suspend/resume).
1041	  It also enables support for two different idle states (idle-wait
1042	  and idle-doze).
1043
1044config 4xx_SOC
1045	bool
1046
1047config FSL_LBC
1048	bool "Freescale Local Bus support"
1049	help
1050	  Enables reporting of errors from the Freescale local bus
1051	  controller.  Also contains some common code used by
1052	  drivers for specific local bus peripherals.
1053
1054config FSL_GTM
1055	bool
1056	depends on PPC_83xx || QUICC_ENGINE || CPM2
1057	help
1058	  Freescale General-purpose Timers support
1059
1060config PCI_8260
1061	bool
1062	depends on PCI && 8260
1063	select PPC_INDIRECT_PCI
1064	default y
1065
1066config FSL_RIO
1067	bool "Freescale Embedded SRIO Controller support"
1068	depends on RAPIDIO = y && HAVE_RAPIDIO
1069	default "n"
1070	help
1071	  Include support for RapidIO controller on Freescale embedded
1072	  processors (MPC8548, MPC8641, etc).
1073
1074endmenu
1075
1076config NONSTATIC_KERNEL
1077	bool
1078
1079menu "Advanced setup"
1080	depends on PPC32
1081
1082config ADVANCED_OPTIONS
1083	bool "Prompt for advanced kernel configuration options"
1084	help
1085	  This option will enable prompting for a variety of advanced kernel
1086	  configuration options.  These options can cause the kernel to not
1087	  work if they are set incorrectly, but can be used to optimize certain
1088	  aspects of kernel memory management.
1089
1090	  Unless you know what you are doing, say N here.
1091
1092comment "Default settings for advanced configuration options are used"
1093	depends on !ADVANCED_OPTIONS
1094
1095config LOWMEM_SIZE_BOOL
1096	bool "Set maximum low memory"
1097	depends on ADVANCED_OPTIONS
1098	help
1099	  This option allows you to set the maximum amount of memory which
1100	  will be used as "low memory", that is, memory which the kernel can
1101	  access directly, without having to set up a kernel virtual mapping.
1102	  This can be useful in optimizing the layout of kernel virtual
1103	  memory.
1104
1105	  Say N here unless you know what you are doing.
1106
1107config LOWMEM_SIZE
1108	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1109	default "0x30000000"
1110
1111config LOWMEM_CAM_NUM_BOOL
1112	bool "Set number of CAMs to use to map low memory"
1113	depends on ADVANCED_OPTIONS && FSL_BOOKE
1114	help
1115	  This option allows you to set the maximum number of CAM slots that
1116	  will be used to map low memory.  There are a limited number of slots
1117	  available and even more limited number that will fit in the L1 MMU.
1118	  However, using more entries will allow mapping more low memory.  This
1119	  can be useful in optimizing the layout of kernel virtual memory.
1120
1121	  Say N here unless you know what you are doing.
1122
1123config LOWMEM_CAM_NUM
1124	depends on FSL_BOOKE
1125	int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1126	default 3 if !STRICT_KERNEL_RWX
1127	default 9 if DATA_SHIFT >= 24
1128	default 12 if DATA_SHIFT >= 22
1129	default 15
1130
1131config DYNAMIC_MEMSTART
1132	bool "Enable page aligned dynamic load address for kernel"
1133	depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
1134	select NONSTATIC_KERNEL
1135	help
1136	  This option enables the kernel to be loaded at any page aligned
1137	  physical address. The kernel creates a mapping from KERNELBASE to
1138	  the address where the kernel is loaded. The page size here implies
1139	  the TLB page size of the mapping for kernel on the particular platform.
1140	  Please refer to the init code for finding the TLB page size.
1141
1142	  DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1143	  kernel image, where the only restriction is the page aligned kernel
1144	  load address. When this option is enabled, the compile time physical
1145	  address CONFIG_PHYSICAL_START is ignored.
1146
1147	  This option is overridden by CONFIG_RELOCATABLE
1148
1149config PAGE_OFFSET_BOOL
1150	bool "Set custom page offset address"
1151	depends on ADVANCED_OPTIONS
1152	help
1153	  This option allows you to set the kernel virtual address at which
1154	  the kernel will map low memory.  This can be useful in optimizing
1155	  the virtual memory layout of the system.
1156
1157	  Say N here unless you know what you are doing.
1158
1159config PAGE_OFFSET
1160	hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1161	default "0xc0000000"
1162
1163config KERNEL_START_BOOL
1164	bool "Set custom kernel base address"
1165	depends on ADVANCED_OPTIONS
1166	help
1167	  This option allows you to set the kernel virtual address at which
1168	  the kernel will be loaded.  Normally this should match PAGE_OFFSET
1169	  however there are times (like kdump) that one might not want them
1170	  to be the same.
1171
1172	  Say N here unless you know what you are doing.
1173
1174config KERNEL_START
1175	hex "Virtual address of kernel base" if KERNEL_START_BOOL
1176	default PAGE_OFFSET if PAGE_OFFSET_BOOL
1177	default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1178	default "0xc0000000"
1179
1180config PHYSICAL_START_BOOL
1181	bool "Set physical address where the kernel is loaded"
1182	depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1183	help
1184	  This gives the physical address where the kernel is loaded.
1185
1186	  Say N here unless you know what you are doing.
1187
1188config PHYSICAL_START
1189	hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1190	default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL
1191	default "0x00000000"
1192
1193config PHYSICAL_ALIGN
1194	hex
1195	default "0x04000000" if FSL_BOOKE
1196	help
1197	  This value puts the alignment restrictions on physical address
1198	  where kernel is loaded and run from. Kernel is compiled for an
1199	  address which meets above alignment restriction.
1200
1201config TASK_SIZE_BOOL
1202	bool "Set custom user task size"
1203	depends on ADVANCED_OPTIONS
1204	help
1205	  This option allows you to set the amount of virtual address space
1206	  allocated to user tasks.  This can be useful in optimizing the
1207	  virtual memory layout of the system.
1208
1209	  Say N here unless you know what you are doing.
1210
1211config TASK_SIZE
1212	hex "Size of user task space" if TASK_SIZE_BOOL
1213	default "0x80000000" if PPC_8xx
1214	default "0xb0000000" if PPC_BOOK3S_32
1215	default "0xc0000000"
1216endmenu
1217
1218if PPC64
1219# This value must have zeroes in the bottom 60 bits otherwise lots will break
1220config PAGE_OFFSET
1221	hex
1222	default "0xc000000000000000"
1223config KERNEL_START
1224	hex
1225	default "0xc000000000000000"
1226config PHYSICAL_START
1227	hex
1228	default "0x00000000"
1229endif
1230
1231config	ARCH_RANDOM
1232	def_bool n
1233
1234config PPC_LIB_RHEAP
1235	bool
1236
1237source "arch/powerpc/kvm/Kconfig"
1238
1239source "kernel/livepatch/Kconfig"
1240