1 source "arch/powerpc/platforms/Kconfig.cputype"
15 config ARCH_PHYS_ADDR_T_64BIT
16 def_bool PPC64 || PHYS_64BIT
18 config ARCH_DMA_ADDR_T_64BIT
19 def_bool ARCH_PHYS_ADDR_T_64BIT
25 config ARCH_MMAP_RND_BITS_MAX
26 # On Book3S 64, the default virtual address space for 64-bit processes
27 # is 2^47 (128TB). As a maximum, allow randomisation to consume up to
28 # 32T of address space (2^45), which should ensure a reasonable gap
29 # between bottom-up and top-down allocations for applications that
30 # consume "normal" amounts of address space. Book3S 64 only supports 64K
32 default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K)
33 default 33 if PPC_BOOK3S_64 # 33 = 45 (32T) - 12 (4K)
35 # On all other 64-bit platforms (currently only Book3E), the virtual
36 # address space is 2^46 (64TB). Allow randomisation to consume up to 16T
37 # of address space (2^44). Only 4K page sizes are supported.
38 default 32 if 64BIT # 32 = 44 (16T) - 12 (4K)
40 # For 32-bit, use the compat values, as they're the same.
41 default ARCH_MMAP_RND_COMPAT_BITS_MAX
43 config ARCH_MMAP_RND_BITS_MIN
44 # Allow randomisation to consume up to 1GB of address space (2^30).
45 default 14 if 64BIT && PPC_64K_PAGES # 14 = 30 (1GB) - 16 (64K)
46 default 18 if 64BIT # 18 = 30 (1GB) - 12 (4K)
48 # For 32-bit, use the compat values, as they're the same.
49 default ARCH_MMAP_RND_COMPAT_BITS_MIN
51 config ARCH_MMAP_RND_COMPAT_BITS_MAX
52 # Total virtual address space for 32-bit processes is 2^31 (2GB).
53 # Allow randomisation to consume up to 512MB of address space (2^29).
54 default 11 if PPC_256K_PAGES # 11 = 29 (512MB) - 18 (256K)
55 default 13 if PPC_64K_PAGES # 13 = 29 (512MB) - 16 (64K)
56 default 15 if PPC_16K_PAGES # 15 = 29 (512MB) - 14 (16K)
57 default 17 # 17 = 29 (512MB) - 12 (4K)
59 config ARCH_MMAP_RND_COMPAT_BITS_MIN
60 # Total virtual address space for 32-bit processes is 2^31 (2GB).
61 # Allow randomisation to consume up to 8MB of address space (2^23).
62 default 5 if PPC_256K_PAGES # 5 = 23 (8MB) - 18 (256K)
63 default 7 if PPC_64K_PAGES # 7 = 23 (8MB) - 16 (64K)
64 default 9 if PPC_16K_PAGES # 9 = 23 (8MB) - 14 (16K)
65 default 11 # 11 = 23 (8MB) - 12 (4K)
67 config HAVE_SETUP_PER_CPU_AREA
70 config NEED_PER_CPU_EMBED_FIRST_CHUNK
74 int "Number of virtual interrupt numbers"
78 This defines the number of virtual interrupt numbers the kernel
79 can manage. Virtual interrupt numbers are what you see in
80 /proc/interrupts. If you configure your system to have too few,
81 drivers will fail to load or worse - handle with care.
85 depends on SMP && (DEBUGGER || KEXEC_CORE)
88 config STACKTRACE_SUPPORT
92 config TRACE_IRQFLAGS_SUPPORT
96 config LOCKDEP_SUPPORT
100 config RWSEM_GENERIC_SPINLOCK
103 config RWSEM_XCHGADD_ALGORITHM
107 config GENERIC_LOCKBREAK
110 depends on SMP && PREEMPT
112 config ARCH_HAS_ILOG2_U32
116 config ARCH_HAS_ILOG2_U64
120 config GENERIC_HWEIGHT
124 config ARCH_HAS_DMA_SET_COHERENT_MASK
131 # Please keep this list sorted alphabetically.
133 select ARCH_HAS_DEVMEM_IS_ALLOWED
134 select ARCH_HAS_DMA_SET_COHERENT_MASK
135 select ARCH_HAS_ELF_RANDOMIZE
136 select ARCH_HAS_GCOV_PROFILE_ALL
137 select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE
138 select ARCH_HAS_SG_CHAIN
139 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
140 select ARCH_HAS_UBSAN_SANITIZE_ALL
141 select ARCH_HAVE_NMI_SAFE_CMPXCHG
142 select ARCH_MIGHT_HAVE_PC_PARPORT
143 select ARCH_MIGHT_HAVE_PC_SERIO
144 select ARCH_SUPPORTS_ATOMIC_RMW
145 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
146 select ARCH_USE_BUILTIN_BSWAP
147 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
148 select ARCH_WANT_IPC_PARSE_VERSION
150 select BUILDTIME_EXTABLE_SORT
151 select CLONE_BACKWARDS
152 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
153 select EDAC_ATOMIC_SCRUB
155 select GENERIC_ATOMIC64 if PPC32
156 select GENERIC_CLOCKEVENTS
157 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
158 select GENERIC_CMOS_UPDATE
159 select GENERIC_CPU_AUTOPROBE
160 select GENERIC_IRQ_SHOW
161 select GENERIC_IRQ_SHOW_LEVEL
162 select GENERIC_SMP_IDLE_THREAD
163 select GENERIC_STRNCPY_FROM_USER
164 select GENERIC_STRNLEN_USER
165 select GENERIC_TIME_VSYSCALL_OLD
166 select HAVE_ARCH_AUDITSYSCALL
167 select HAVE_ARCH_JUMP_LABEL
168 select HAVE_ARCH_KGDB
169 select HAVE_ARCH_MMAP_RND_BITS
170 select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
171 select HAVE_ARCH_SECCOMP_FILTER
172 select HAVE_ARCH_TRACEHOOK
173 select HAVE_CBPF_JIT if !PPC64
174 select HAVE_CONTEXT_TRACKING if PPC64
175 select HAVE_DEBUG_KMEMLEAK
176 select HAVE_DEBUG_STACKOVERFLOW
177 select HAVE_DMA_API_DEBUG
178 select HAVE_DYNAMIC_FTRACE
179 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
180 select HAVE_EBPF_JIT if PPC64
181 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
182 select HAVE_FTRACE_MCOUNT_RECORD
183 select HAVE_FUNCTION_GRAPH_TRACER
184 select HAVE_FUNCTION_TRACER
185 select HAVE_GCC_PLUGINS
186 select HAVE_GENERIC_RCU_GUP
187 select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
189 select HAVE_IOREMAP_PROT
190 select HAVE_IRQ_EXIT_ON_IRQ_STACK
191 select HAVE_KERNEL_GZIP
193 select HAVE_KPROBES_ON_FTRACE
194 select HAVE_KRETPROBES
195 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
197 select HAVE_MEMBLOCK_NODE_MAP
198 select HAVE_MOD_ARCH_SPECIFIC
199 select HAVE_NMI if PERF_EVENTS
201 select HAVE_OPTPROBES if PPC64
202 select HAVE_PERF_EVENTS
203 select HAVE_PERF_EVENTS_NMI if PPC64
204 select HAVE_PERF_REGS
205 select HAVE_PERF_USER_STACK_DUMP
206 select HAVE_RCU_TABLE_FREE if SMP
207 select HAVE_REGS_AND_STACK_ACCESS_API
208 select HAVE_SYSCALL_TRACEPOINTS
209 select HAVE_VIRT_CPU_ACCOUNTING
211 select IRQ_FORCED_THREADING
212 select MODULES_USE_ELF_RELA
215 select OF_EARLY_FLATTREE
216 select OF_RESERVED_MEM
217 select OLD_SIGACTION if PPC32
218 select OLD_SIGSUSPEND
220 select SYSCTL_EXCEPTION_TRACE
221 select VIRT_TO_BUS if !PPC64
223 # Please keep this list sorted alphabetically.
240 select COMPAT_BINFMT_ELF
241 select ARCH_WANT_OLD_COMPAT_IPC
242 select COMPAT_OLD_SIGACTION
244 config SYSVIPC_COMPAT
246 depends on COMPAT && SYSVIPC
249 # All PPC32s use generic nvram driver through ppc_md
254 config SCHED_OMIT_FRAME_POINTER
258 config ARCH_MAY_HAVE_PC_FDC
262 config PPC_UDBG_16550
266 config GENERIC_TBSYNC
268 default y if PPC32 && SMP
280 config SYS_SUPPORTS_APM_EMULATION
281 default y if PMAC_APM_EMU
287 Used to allow a board to specify it wants an ePAPR compliant wrapper.
290 config DEFAULT_UIMAGE
293 Used to allow a board to specify it wants a uImage built by default
296 config ARCH_HIBERNATION_POSSIBLE
300 config ARCH_SUSPEND_POSSIBLE
302 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
303 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
306 config PPC_DCR_NATIVE
316 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
319 config PPC_OF_PLATFORM_PCI
322 depends on PPC64 # not supported on 32 bits yet
325 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
326 depends on PPC32 || PPC_STD_MMU_64
329 config ARCH_SUPPORTS_UPROBES
332 config PPC_ADV_DEBUG_REGS
334 depends on 40x || BOOKE
337 config PPC_ADV_DEBUG_IACS
339 depends on PPC_ADV_DEBUG_REGS
343 config PPC_ADV_DEBUG_DACS
345 depends on PPC_ADV_DEBUG_REGS
348 config PPC_ADV_DEBUG_DVCS
350 depends on PPC_ADV_DEBUG_REGS
354 config PPC_ADV_DEBUG_DAC_RANGE
356 depends on PPC_ADV_DEBUG_REGS && 44x
359 config PPC_EMULATE_SSTEP
361 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
367 config PGTABLE_LEVELS
370 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
373 source "init/Kconfig"
375 source "kernel/Kconfig.freezer"
377 source "arch/powerpc/sysdev/Kconfig"
378 source "arch/powerpc/platforms/Kconfig"
380 menu "Kernel options"
383 bool "High memory support"
386 source kernel/Kconfig.hz
387 source kernel/Kconfig.preempt
388 source "fs/Kconfig.binfmt"
390 config HUGETLB_PAGE_SIZE_VARIABLE
392 depends on HUGETLB_PAGE
395 config MATH_EMULATION
396 bool "Math emulation"
397 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
399 Some PowerPC chips designed for embedded applications do not have
400 a floating-point unit and therefore do not implement the
401 floating-point instructions in the PowerPC instruction set. If you
402 say Y here, the kernel will include code to emulate a floating-point
403 unit, which will allow programs that use floating-point
406 This is also useful to emulate missing (optional) instructions
407 such as fsqrt on cores that do have an FPU but do not implement
408 them (such as Freescale BookE).
411 prompt "Math emulation options"
412 default MATH_EMULATION_FULL
413 depends on MATH_EMULATION
415 config MATH_EMULATION_FULL
416 bool "Emulate all the floating point instructions"
418 Select this option will enable the kernel to support to emulate
419 all the floating point instructions. If your SoC doesn't have
420 a FPU, you should select this.
422 config MATH_EMULATION_HW_UNIMPLEMENTED
423 bool "Just emulate the FPU unimplemented instructions"
425 Select this if you know there does have a hardware FPU on your
426 SoC, but some floating point instructions are not implemented by that.
430 config PPC_TRANSACTIONAL_MEM
431 bool "Transactional Memory support for POWERPC"
432 depends on PPC_BOOK3S_64
438 Support user-mode Transactional Memory on POWERPC.
440 config DISABLE_MPROFILE_KERNEL
441 bool "Disable use of mprofile-kernel for kernel tracing"
442 depends on PPC64 && CPU_LITTLE_ENDIAN
445 Selecting this options disables use of the mprofile-kernel ABI for
446 kernel tracing. That will cause options such as live patching
447 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
450 If you have a toolchain which supports mprofile-kernel, then you can
451 disable this. Otherwise leave it enabled. If you're not sure, say
454 config MPROFILE_KERNEL
455 depends on PPC64 && CPU_LITTLE_ENDIAN
456 def_bool !DISABLE_MPROFILE_KERNEL
458 config USE_THIN_ARCHIVES
459 bool "Build the kernel using thin archives"
463 Build the kernel using thin archives.
464 If you're unsure say N.
470 bool "SWIOTLB support"
474 Support for IO bounce buffering for systems without an IOMMU.
475 This allows us to DMA to the full physical address space on
476 platforms where the size of a physical address is larger
477 than the bus address. Not all platforms support this.
480 bool "Support for enabling/disabling CPUs"
481 depends on SMP && (PPC_PSERIES || \
482 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
484 Say Y here to be able to disable and re-enable individual
485 CPUs at runtime on SMP machines.
487 Say N if you are unsure.
489 config ARCH_CPU_PROBE_RELEASE
491 depends on HOTPLUG_CPU
493 config ARCH_ENABLE_MEMORY_HOTPLUG
496 config ARCH_HAS_WALK_MEMORY
499 config ARCH_ENABLE_MEMORY_HOTREMOVE
502 config PPC64_SUPPORTS_MEMORY_FAILURE
503 bool "Add support for memory hwpoison"
504 depends on PPC_BOOK3S_64
505 default "y" if PPC_POWERNV
506 select ARCH_SUPPORTS_MEMORY_FAILURE
509 bool "kexec system call"
510 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
513 kexec is a system call that implements the ability to shutdown your
514 current kernel, and to start another kernel. It is like a reboot
515 but it is independent of the system firmware. And like a reboot
516 you can start any kernel with it, not just Linux.
518 The name comes from the similarity to the exec system call.
520 It is an ongoing process to be certain the hardware in a machine
521 is properly shutdown, so do not be surprised if this code does not
522 initially work for you. As of this writing the exact hardware
523 interface is strongly in flux, so no good recommendation can be
527 bool "kexec file based system call"
529 select HAVE_IMA_KEXEC
533 depends on CRYPTO_SHA256=y
535 This is a new version of the kexec system call. This call is
536 file based and takes in file descriptors as system call arguments
537 for kernel and initramfs as opposed to a list of segments as is the
538 case for the older kexec call.
541 bool "Build a relocatable kernel"
542 depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE))
543 select NONSTATIC_KERNEL
544 select MODULE_REL_CRCS if MODVERSIONS
546 This builds a kernel image that is capable of running at the
547 location the kernel is loaded at. For ppc32, there is no any
548 alignment restrictions, and this feature is a superset of
549 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
550 16k-aligned base address. The kernel is linked as a
551 position-independent executable (PIE) and contains dynamic relocations
552 which are processed early in the bootup process.
554 One use is for the kexec on panic case where the recovery kernel
555 must live at a different physical address than the primary
558 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
559 it has been loaded at and the compile time physical addresses
560 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
561 setting can still be useful to bootwrappers that need to know the
562 load address of the kernel (eg. u-boot/mkimage).
564 config RELOCATABLE_TEST
565 bool "Test relocatable kernel"
566 depends on (PPC64 && RELOCATABLE)
569 This runs the relocatable kernel at the address it was initially
570 loaded at, which tends to be non-zero and therefore test the
574 bool "Build a kdump crash kernel"
575 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
576 select RELOCATABLE if PPC64 || 44x || FSL_BOOKE
578 Build a kernel suitable for use as a kdump capture kernel.
579 The same kernel binary can be used as production kernel and dump
583 bool "Firmware-assisted dump"
584 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC_CORE
586 A robust mechanism to get reliable kernel crash dump with
587 assistance from firmware. This approach does not use kexec,
588 instead firmware assists in booting the kdump kernel
589 while preserving memory contents. Firmware-assisted dump
590 is meant to be a kdump replacement offering robustness and
591 speed not possible without system firmware assistance.
596 bool "Distribute interrupts on all CPUs by default"
599 This option gives the kernel permission to distribute IRQs across
600 multiple CPUs. Saying N here will route all IRQs to the first
601 CPU. Generally saying Y is safe, although some problems have been
602 reported with SMP Power Macintoshes with this option enabled.
607 default y if SMP && PPC_PSERIES
613 depends on NEED_MULTIPLE_NODES
615 config USE_PERCPU_NUMA_NODE_ID
619 config HAVE_MEMORYLESS_NODES
623 config ARCH_SELECT_MEMORY_MODEL
627 config ARCH_FLATMEM_ENABLE
629 depends on (PPC64 && !NUMA) || PPC32
631 config ARCH_SPARSEMEM_ENABLE
634 select SPARSEMEM_VMEMMAP_ENABLE
636 config ARCH_SPARSEMEM_DEFAULT
638 depends on PPC_BOOK3S_64
640 config SYS_SUPPORTS_HUGETLBFS
643 config ILLEGAL_POINTER_VALUE
645 # This is roughly half way between the top of user space and the bottom
646 # of kernel space, which seems about as good as we can get.
647 default 0x5deadbeef0000000 if PPC64
652 config ARCH_MEMORY_PROBE
654 depends on MEMORY_HOTPLUG
656 # Some NUMA nodes have memory ranges that span
657 # other nodes. Even though a pfn is valid and
658 # between a node's start and end pfns, it may not
659 # reside on that node. See memmap_init_zone()
661 config NODES_SPAN_OTHER_NODES
663 depends on NEED_MULTIPLE_NODES
666 bool "Using standard binutils settings"
670 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
671 Note, that kernel will be able to run only those applications,
672 which had been compiled using binutils later than 2.17.50.0.3 with
673 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
674 the older binutils, you can patch them with a trivial patch, which
675 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
681 Select the kernel logical page size. Increasing the page size
682 will reduce software overhead at each page boundary, allow
683 hardware prefetch mechanisms to be more effective, and allow
684 larger dma transfers increasing IO efficiency and reducing
685 overhead. However the utilization of memory will increase.
686 For example, each cached file will using a multiple of the
687 page size to hold its contents and the difference between the
688 end of file and the end of page is wasted.
690 Some dedicated systems, such as software raid serving with
691 accelerated calculations, have shown significant increases.
693 If you configure a 64 bit kernel for 64k pages but the
694 processor does not support them, then the kernel will simulate
695 them with 4k pages, loading them on demand, but with the
696 reduced software overhead and larger internal fragmentation.
697 For the 32 bit kernel, a large page option will not be offered
698 unless it is supported by the configured processor.
700 If unsure, choose 4K_PAGES.
704 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
708 depends on 44x || PPC_8xx
712 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
713 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
715 config PPC_256K_PAGES
716 bool "256k page size"
717 depends on 44x && !STDBINUTILS
719 Make the page size 256k.
721 As the ELF standard only requires alignment to support page
722 sizes up to 64k, you will need to compile all of your user
723 space applications with a non-standard binutils settings
724 (see the STDBINUTILS description for details).
726 Say N unless you know what you are doing.
731 int "Thread shift" if EXPERT
733 default "15" if PPC_256K_PAGES
734 default "14" if PPC64
737 Used to define the stack size. The default is almost always what you
738 want. Only change this if you know what you are doing.
740 config FORCE_MAX_ZONEORDER
741 int "Maximum zone order"
742 range 8 9 if PPC64 && PPC_64K_PAGES
743 default "9" if PPC64 && PPC_64K_PAGES
744 range 13 13 if PPC64 && !PPC_64K_PAGES
745 default "13" if PPC64 && !PPC_64K_PAGES
746 range 9 64 if PPC32 && PPC_16K_PAGES
747 default "9" if PPC32 && PPC_16K_PAGES
748 range 7 64 if PPC32 && PPC_64K_PAGES
749 default "7" if PPC32 && PPC_64K_PAGES
750 range 5 64 if PPC32 && PPC_256K_PAGES
751 default "5" if PPC32 && PPC_256K_PAGES
755 The kernel memory allocator divides physically contiguous memory
756 blocks into "zones", where each zone is a power of two number of
757 pages. This option selects the largest power of two that the kernel
758 keeps in the memory allocator. If you need to allocate very large
759 blocks of physically contiguous memory, then you may need to
762 This config option is actually maximum order plus one. For example,
763 a value of 11 means that the largest free memory block is 2^10 pages.
765 The page size is not necessarily 4KB. For example, on 64-bit
766 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
767 this in mind when choosing a value for this option.
769 config PPC_SUBPAGE_PROT
770 bool "Support setting protections for 4k subpages"
771 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
773 This option adds support for a system call to allow user programs
774 to set access permissions (read/write, readonly, or no access)
775 on the 4k subpages of each 64k page.
777 config PPC_COPRO_BASE
782 bool "SMT (Hyperthreading) scheduler support"
783 depends on PPC64 && SMP
785 SMT scheduler support improves the CPU scheduler's decision making
786 when dealing with POWER5 cpus at a cost of slightly increased
787 overhead in some places. If unsure say N here.
789 config PPC_DENORMALISATION
790 bool "PowerPC denormalisation exception handling"
791 depends on PPC_BOOK3S_64
792 default "y" if PPC_POWERNV
794 Add support for handling denormalisation of single precision
795 values. Useful for bare metal only. If unsure say Y here.
798 bool "Default bootloader kernel arguments"
801 string "Initial kernel command string"
802 depends on CMDLINE_BOOL
803 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
805 On some platforms, there is currently no way for the boot loader to
806 pass arguments to the kernel. For these platforms, you can supply
807 some command-line options at build time by entering them here. In
808 most cases you will need to specify the root device here.
811 bool "Always use the default kernel command string"
812 depends on CMDLINE_BOOL
814 Always use the default kernel command string, even if the boot
815 loader passes other arguments to the kernel.
816 This is useful if you cannot or don't want to change the
817 command-line options your boot loader passes to the kernel.
820 string "Additional default image types"
822 List additional targets to be built by the bootwrapper here (separated
823 by spaces). This is useful for targets that depend of device tree
824 files in the .dts directory.
826 Targets in this list will be build as part of the default build
827 target, or when the user does a 'make zImage' or a
828 'make zImage.initrd'.
830 If unsure, leave blank
832 config ARCH_WANTS_FREEZER_CONTROL
836 source kernel/power/Kconfig
839 bool "Enable seccomp to safely compute untrusted bytecode"
843 This kernel feature is useful for number crunching applications
844 that may need to compute untrusted bytecode during their
845 execution. By using pipes or other transports made available to
846 the process as file descriptors supporting the read/write
847 syscalls, it's possible to isolate those applications in
848 their own address space using seccomp. Once seccomp is
849 enabled via /proc/<pid>/seccomp, it cannot be disabled
850 and the task is only allowed to execute a few safe syscalls
851 defined by each seccomp mode.
853 If unsure, say Y. Only embedded should say N here.
864 bool "Support for ISA-bus hardware"
868 Find out whether you have ISA slots on your motherboard. ISA is the
869 name of a bus system, i.e. the way the CPU talks to the other stuff
870 inside your box. If you have an Apple machine, say N here; if you
871 have an IBM RS/6000 or pSeries machine, say Y. If you have an
872 embedded board, consult your board documentation.
878 config NEED_DMA_MAP_STATE
879 def_bool (PPC64 || NOT_COHERENT_CACHE)
881 config NEED_SG_DMA_LENGTH
884 config GENERIC_ISA_DMA
886 depends on ISA_DMA_API
889 config PPC_INDIRECT_PCI
892 default y if 40x || 44x
906 select PPC_INDIRECT_PCI
912 depends on SUSPEND && (PPC_85xx || PPC_86xx)
914 Freescale MPC85xx/MPC86xx power management controller support
915 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
920 depends on SUSPEND && (44x || 40x)
922 PPC4xx Clock Power Management (CPM) support (suspend/resume).
923 It also enables support for two different idle states (idle-wait
930 bool "Freescale Local Bus support"
932 Enables reporting of errors from the Freescale local bus
933 controller. Also contains some common code used by
934 drivers for specific local bus peripherals.
938 depends on PPC_83xx || QUICC_ENGINE || CPM2
940 Freescale General-purpose Timers support
942 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
946 # Platforms that what PCI turned unconditionally just do select PCI
947 # in their config node. Platforms that want to choose at config
948 # time should select PPC_PCI_CHOICE
949 config PPC_PCI_CHOICE
953 bool "PCI support" if PPC_PCI_CHOICE
954 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
955 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
956 default PCI_QSPAN if !4xx && !CPM2 && 8xx
957 select GENERIC_PCI_IOMAP
959 Find out whether your system includes a PCI bus. PCI is the name of
960 a bus system, i.e. the way the CPU talks to the other stuff inside
961 your box. If you say Y here, the kernel will include drivers and
962 infrastructure code to support PCI bus devices.
972 depends on !4xx && !CPM2 && 8xx
975 Say Y here if you have a system based on a Motorola 8xx-series
976 embedded processor with a QSPAN PCI interface, otherwise say N.
980 depends on PCI && 8260
981 select PPC_INDIRECT_PCI
984 source "drivers/pci/Kconfig"
986 source "drivers/pcmcia/Kconfig"
993 tristate "RapidIO support"
994 depends on HAS_RAPIDIO || PCI
996 If you say Y here, the kernel will include drivers and
997 infrastructure code to support RapidIO interconnect devices.
1000 bool "Freescale Embedded SRIO Controller support"
1001 depends on RAPIDIO = y && HAS_RAPIDIO
1004 Include support for RapidIO controller on Freescale embedded
1005 processors (MPC8548, MPC8641, etc).
1007 source "drivers/rapidio/Kconfig"
1011 config NONSTATIC_KERNEL
1015 menu "Advanced setup"
1018 config ADVANCED_OPTIONS
1019 bool "Prompt for advanced kernel configuration options"
1021 This option will enable prompting for a variety of advanced kernel
1022 configuration options. These options can cause the kernel to not
1023 work if they are set incorrectly, but can be used to optimize certain
1024 aspects of kernel memory management.
1026 Unless you know what you are doing, say N here.
1028 comment "Default settings for advanced configuration options are used"
1029 depends on !ADVANCED_OPTIONS
1031 config LOWMEM_SIZE_BOOL
1032 bool "Set maximum low memory"
1033 depends on ADVANCED_OPTIONS
1035 This option allows you to set the maximum amount of memory which
1036 will be used as "low memory", that is, memory which the kernel can
1037 access directly, without having to set up a kernel virtual mapping.
1038 This can be useful in optimizing the layout of kernel virtual
1041 Say N here unless you know what you are doing.
1044 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1045 default "0x30000000"
1047 config LOWMEM_CAM_NUM_BOOL
1048 bool "Set number of CAMs to use to map low memory"
1049 depends on ADVANCED_OPTIONS && FSL_BOOKE
1051 This option allows you to set the maximum number of CAM slots that
1052 will be used to map low memory. There are a limited number of slots
1053 available and even more limited number that will fit in the L1 MMU.
1054 However, using more entries will allow mapping more low memory. This
1055 can be useful in optimizing the layout of kernel virtual memory.
1057 Say N here unless you know what you are doing.
1059 config LOWMEM_CAM_NUM
1060 depends on FSL_BOOKE
1061 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1064 config DYNAMIC_MEMSTART
1065 bool "Enable page aligned dynamic load address for kernel"
1066 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
1067 select NONSTATIC_KERNEL
1069 This option enables the kernel to be loaded at any page aligned
1070 physical address. The kernel creates a mapping from KERNELBASE to
1071 the address where the kernel is loaded. The page size here implies
1072 the TLB page size of the mapping for kernel on the particular platform.
1073 Please refer to the init code for finding the TLB page size.
1075 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1076 kernel image, where the only restriction is the page aligned kernel
1077 load address. When this option is enabled, the compile time physical
1078 address CONFIG_PHYSICAL_START is ignored.
1080 This option is overridden by CONFIG_RELOCATABLE
1082 config PAGE_OFFSET_BOOL
1083 bool "Set custom page offset address"
1084 depends on ADVANCED_OPTIONS
1086 This option allows you to set the kernel virtual address at which
1087 the kernel will map low memory. This can be useful in optimizing
1088 the virtual memory layout of the system.
1090 Say N here unless you know what you are doing.
1093 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1094 default "0xc0000000"
1096 config KERNEL_START_BOOL
1097 bool "Set custom kernel base address"
1098 depends on ADVANCED_OPTIONS
1100 This option allows you to set the kernel virtual address at which
1101 the kernel will be loaded. Normally this should match PAGE_OFFSET
1102 however there are times (like kdump) that one might not want them
1105 Say N here unless you know what you are doing.
1108 hex "Virtual address of kernel base" if KERNEL_START_BOOL
1109 default PAGE_OFFSET if PAGE_OFFSET_BOOL
1110 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1111 default "0xc0000000"
1113 config PHYSICAL_START_BOOL
1114 bool "Set physical address where the kernel is loaded"
1115 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1117 This gives the physical address where the kernel is loaded.
1119 Say N here unless you know what you are doing.
1121 config PHYSICAL_START
1122 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1123 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1124 default "0x00000000"
1126 config PHYSICAL_ALIGN
1128 default "0x04000000" if FSL_BOOKE
1130 This value puts the alignment restrictions on physical address
1131 where kernel is loaded and run from. Kernel is compiled for an
1132 address which meets above alignment restriction.
1134 config TASK_SIZE_BOOL
1135 bool "Set custom user task size"
1136 depends on ADVANCED_OPTIONS
1138 This option allows you to set the amount of virtual address space
1139 allocated to user tasks. This can be useful in optimizing the
1140 virtual memory layout of the system.
1142 Say N here unless you know what you are doing.
1145 hex "Size of user task space" if TASK_SIZE_BOOL
1146 default "0x80000000" if PPC_8xx
1147 default "0xc0000000"
1149 config CONSISTENT_SIZE_BOOL
1150 bool "Set custom consistent memory pool size"
1151 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1153 This option allows you to set the size of the
1154 consistent memory pool. This pool of virtual memory
1155 is used to make consistent memory allocations.
1157 config CONSISTENT_SIZE
1158 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1159 default "0x00200000" if NOT_COHERENT_CACHE
1162 bool "Pinned Kernel TLBs (860 ONLY)"
1163 depends on ADVANCED_OPTIONS && 8xx
1166 bool "Pinned TLB for IMMR"
1172 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1175 default "0xc000000000000000"
1178 default "0xc000000000000000"
1179 config PHYSICAL_START
1181 default "0x00000000"
1187 source "net/Kconfig"
1189 source "drivers/Kconfig"
1193 source "lib/Kconfig"
1195 source "arch/powerpc/Kconfig.debug"
1197 source "security/Kconfig"
1201 depends on COMPAT && KEYS
1204 source "crypto/Kconfig"
1206 config PPC_LIB_RHEAP
1209 source "arch/powerpc/kvm/Kconfig"
1211 source "kernel/livepatch/Kconfig"