4 select ARCH_BINFMT_ELF_RANDOMIZE_PIE
5 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
6 select ARCH_HAVE_CUSTOM_GPIO_H
7 select ARCH_SUPPORTS_ATOMIC_RMW
8 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
9 select ARCH_WANT_IPC_PARSE_VERSION
10 select BUILDTIME_EXTABLE_SORT if MMU
11 select CPU_PM if (SUSPEND || CPU_IDLE)
12 select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
13 select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
14 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
15 select GENERIC_IRQ_PROBE
16 select GENERIC_IRQ_SHOW
17 select GENERIC_PCI_IOMAP
18 select GENERIC_SMP_IDLE_THREAD
19 select GENERIC_IDLE_POLL_SETUP
20 select GENERIC_STRNCPY_FROM_USER
21 select GENERIC_STRNLEN_USER
22 select HARDIRQS_SW_RESEND
23 select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
25 select HAVE_ARCH_SECCOMP_FILTER
26 select HAVE_ARCH_TRACEHOOK
28 select HAVE_C_RECORDMCOUNT
29 select HAVE_DEBUG_KMEMLEAK
30 select HAVE_DMA_API_DEBUG
32 select HAVE_DMA_CONTIGUOUS if MMU
33 select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
34 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
35 select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
36 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
37 select HAVE_GENERIC_DMA_COHERENT
38 select HAVE_GENERIC_HARDIRQS
39 select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
40 select HAVE_IDE if PCI || ISA || PCMCIA
41 select HAVE_IRQ_TIME_ACCOUNTING
42 select HAVE_KERNEL_GZIP
43 select HAVE_KERNEL_LZMA
44 select HAVE_KERNEL_LZO
46 select HAVE_KPROBES if !XIP_KERNEL
47 select HAVE_KRETPROBES if (HAVE_KPROBES)
49 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
50 select HAVE_PERF_EVENTS
51 select HAVE_REGS_AND_STACK_ACCESS_API
52 select HAVE_SYSCALL_TRACEPOINTS
55 select PERF_USE_VMALLOC
57 select SYS_SUPPORTS_APM_EMULATION
58 select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
59 select MODULES_USE_ELF_REL
60 select CLONE_BACKWARDS
61 select OLD_SIGSUSPEND3
63 select HAVE_CONTEXT_TRACKING
65 The ARM series is a line of low-power-consumption RISC chip designs
66 licensed by ARM Ltd and targeted at embedded applications and
67 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
68 manufactured, but legacy ARM-based PC hardware remains popular in
69 Europe. There is an ARM Linux project with a web page at
70 <http://www.arm.linux.org.uk/>.
72 config ARM_HAS_SG_CHAIN
75 config NEED_SG_DMA_LENGTH
78 config ARM_DMA_USE_IOMMU
80 select ARM_HAS_SG_CHAIN
81 select NEED_SG_DMA_LENGTH
85 config ARM_DMA_IOMMU_ALIGNMENT
86 int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
90 DMA mapping framework by default aligns all buffers to the smallest
91 PAGE_SIZE order which is greater than or equal to the requested buffer
92 size. This works well for buffers up to a few hundreds kilobytes, but
93 for larger buffers it just a waste of address space. Drivers which has
94 relatively small addressing window (like 64Mib) might run out of
95 virtual space with just a few allocations.
97 With this parameter you can specify the maximum PAGE_SIZE order for
98 DMA IOMMU buffers. Larger buffers will be aligned only to this
99 specified order. The order is expressed as a power of two multiplied
107 config MIGHT_HAVE_PCI
110 config SYS_SUPPORTS_APM_EMULATION
115 select GENERIC_ALLOCATOR
126 The Extended Industry Standard Architecture (EISA) bus was
127 developed as an open alternative to the IBM MicroChannel bus.
129 The EISA bus provided some of the features of the IBM MicroChannel
130 bus while maintaining backward compatibility with cards made for
131 the older ISA bus. The EISA bus saw limited use between 1988 and
132 1995 when it was made obsolete by the PCI bus.
134 Say Y here if you are building a kernel for an EISA-based machine.
141 config STACKTRACE_SUPPORT
145 config HAVE_LATENCYTOP_SUPPORT
150 config LOCKDEP_SUPPORT
154 config TRACE_IRQFLAGS_SUPPORT
158 config RWSEM_GENERIC_SPINLOCK
162 config RWSEM_XCHGADD_ALGORITHM
165 config ARCH_HAS_ILOG2_U32
168 config ARCH_HAS_ILOG2_U64
171 config ARCH_HAS_CPUFREQ
174 Internal node to signify that the ARCH has CPUFREQ support
175 and that the relevant menu configurations are displayed for
178 config GENERIC_HWEIGHT
182 config GENERIC_CALIBRATE_DELAY
186 config ARCH_MAY_HAVE_PC_FDC
192 config NEED_DMA_MAP_STATE
195 config ARCH_HAS_DMA_SET_COHERENT_MASK
198 config GENERIC_ISA_DMA
204 config NEED_RET_TO_USER
212 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
213 default DRAM_BASE if REMAP_VECTORS_TO_RAM
216 The base address of exception vectors. This must be two pages
219 config ARM_PATCH_PHYS_VIRT
220 bool "Patch physical to virtual translations at runtime" if EMBEDDED
222 depends on !XIP_KERNEL && MMU
223 depends on !ARCH_REALVIEW || !SPARSEMEM
225 Patch phys-to-virt and virt-to-phys translation functions at
226 boot and module load time according to the position of the
227 kernel in system memory.
229 This can only be used with non-XIP MMU kernels where the base
230 of physical memory is at a 16MB boundary.
232 Only disable this option if you know that you do not require
233 this feature (eg, building a kernel for a single machine) and
234 you need to shrink the kernel to the minimal size.
236 config NEED_MACH_GPIO_H
239 Select this when mach/gpio.h is required to provide special
240 definitions for this platform. The need for mach/gpio.h should
241 be avoided when possible.
243 config NEED_MACH_IO_H
246 Select this when mach/io.h is required to provide special
247 definitions for this platform. The need for mach/io.h should
248 be avoided when possible.
250 config NEED_MACH_MEMORY_H
253 Select this when mach/memory.h is required to provide special
254 definitions for this platform. The need for mach/memory.h should
255 be avoided when possible.
258 hex "Physical address of main memory" if MMU
259 depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
260 default DRAM_BASE if !MMU
262 Please provide the physical address corresponding to the
263 location of main memory in your system.
269 source "init/Kconfig"
271 source "kernel/Kconfig.freezer"
276 bool "MMU-based Paged Memory Management Support"
279 Select if you want MMU-based virtualised addressing space
280 support by paged memory management. If unsure, say 'Y'.
283 # The "ARM system type" choice list is ordered alphabetically by option
284 # text. Please add new entries in the option alphabetic order.
287 prompt "ARM system type"
288 default ARCH_VERSATILE if !MMU
289 default ARCH_MULTIPLATFORM if MMU
291 config ARCH_MULTIPLATFORM
292 bool "Allow multiple platforms to be selected"
294 select ARM_PATCH_PHYS_VIRT
297 select MULTI_IRQ_HANDLER
301 config ARCH_INTEGRATOR
302 bool "ARM Ltd. Integrator family"
303 select ARCH_HAS_CPUFREQ
306 select COMMON_CLK_VERSATILE
307 select GENERIC_CLOCKEVENTS
310 select MULTI_IRQ_HANDLER
311 select NEED_MACH_MEMORY_H
312 select PLAT_VERSATILE
314 select VERSATILE_FPGA_IRQ
316 Support for ARM's Integrator platform.
319 bool "ARM Ltd. RealView family"
320 select ARCH_WANT_OPTIONAL_GPIOLIB
322 select ARM_TIMER_SP804
324 select COMMON_CLK_VERSATILE
325 select GENERIC_CLOCKEVENTS
326 select GPIO_PL061 if GPIOLIB
328 select NEED_MACH_MEMORY_H
329 select PLAT_VERSATILE
330 select PLAT_VERSATILE_CLCD
332 This enables support for ARM Ltd RealView boards.
334 config ARCH_VERSATILE
335 bool "ARM Ltd. Versatile family"
336 select ARCH_WANT_OPTIONAL_GPIOLIB
338 select ARM_TIMER_SP804
341 select GENERIC_CLOCKEVENTS
342 select HAVE_MACH_CLKDEV
344 select PLAT_VERSATILE
345 select PLAT_VERSATILE_CLCD
346 select PLAT_VERSATILE_CLOCK
347 select VERSATILE_FPGA_IRQ
349 This enables support for ARM Ltd Versatile board.
353 select ARCH_REQUIRE_GPIOLIB
357 select NEED_MACH_GPIO_H
358 select NEED_MACH_IO_H if PCCARD
360 select PINCTRL_AT91 if USE_OF
362 This enables support for systems based on Atmel
363 AT91RM9200 and AT91SAM9* processors.
366 bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
367 select ARCH_REQUIRE_GPIOLIB
372 select GENERIC_CLOCKEVENTS
373 select MULTI_IRQ_HANDLER
374 select NEED_MACH_MEMORY_H
377 Support for Cirrus Logic 711x/721x/731x based boards.
380 bool "Cortina Systems Gemini"
381 select ARCH_REQUIRE_GPIOLIB
382 select ARCH_USES_GETTIMEOFFSET
383 select NEED_MACH_GPIO_H
386 Support for the Cortina Systems Gemini family SoCs
390 select ARCH_USES_GETTIMEOFFSET
393 select NEED_MACH_IO_H
394 select NEED_MACH_MEMORY_H
397 This is an evaluation board for the StrongARM processor available
398 from Digital. It has limited hardware on-board, including an
399 Ethernet interface, two PCMCIA sockets, two serial ports and a
404 select ARCH_HAS_HOLES_MEMORYMODEL
405 select ARCH_REQUIRE_GPIOLIB
406 select ARCH_USES_GETTIMEOFFSET
411 select NEED_MACH_MEMORY_H
413 This enables support for the Cirrus EP93xx series of CPUs.
415 config ARCH_FOOTBRIDGE
419 select GENERIC_CLOCKEVENTS
421 select NEED_MACH_IO_H if !MMU
422 select NEED_MACH_MEMORY_H
424 Support for systems based on the DC21285 companion chip
425 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
428 bool "Hilscher NetX based"
432 select GENERIC_CLOCKEVENTS
434 This enables support for systems based on the Hilscher NetX Soc
439 select ARCH_SUPPORTS_MSI
441 select NEED_MACH_MEMORY_H
442 select NEED_RET_TO_USER
447 Support for Intel's IOP13XX (XScale) family of processors.
452 select ARCH_REQUIRE_GPIOLIB
454 select NEED_MACH_GPIO_H
455 select NEED_RET_TO_USER
459 Support for Intel's 80219 and IOP32X (XScale) family of
465 select ARCH_REQUIRE_GPIOLIB
467 select NEED_MACH_GPIO_H
468 select NEED_RET_TO_USER
472 Support for Intel's IOP33X (XScale) family of processors.
477 select ARCH_HAS_DMA_SET_COHERENT_MASK
478 select ARCH_SUPPORTS_BIG_ENDIAN
479 select ARCH_REQUIRE_GPIOLIB
482 select DMABOUNCE if PCI
483 select GENERIC_CLOCKEVENTS
484 select MIGHT_HAVE_PCI
485 select NEED_MACH_IO_H
486 select USB_EHCI_BIG_ENDIAN_MMIO
487 select USB_EHCI_BIG_ENDIAN_DESC
489 Support for Intel's IXP4XX (XScale) family of processors.
493 select ARCH_REQUIRE_GPIOLIB
495 select GENERIC_CLOCKEVENTS
496 select MIGHT_HAVE_PCI
499 select PLAT_ORION_LEGACY
500 select USB_ARCH_HAS_EHCI
503 Support for the Marvell Dove SoC 88AP510
506 bool "Marvell Kirkwood"
507 select ARCH_REQUIRE_GPIOLIB
509 select GENERIC_CLOCKEVENTS
513 select PINCTRL_KIRKWOOD
514 select PLAT_ORION_LEGACY
517 Support for the following Marvell Kirkwood series SoCs:
518 88F6180, 88F6192 and 88F6281.
521 bool "Marvell MV78xx0"
522 select ARCH_REQUIRE_GPIOLIB
524 select GENERIC_CLOCKEVENTS
526 select PLAT_ORION_LEGACY
529 Support for the following Marvell MV78xx0 series SoCs:
535 select ARCH_REQUIRE_GPIOLIB
537 select GENERIC_CLOCKEVENTS
539 select PLAT_ORION_LEGACY
542 Support for the following Marvell Orion 5x series SoCs:
543 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
544 Orion-2 (5281), Orion-1-90 (6183).
547 bool "Marvell PXA168/910/MMP2"
549 select ARCH_REQUIRE_GPIOLIB
551 select GENERIC_ALLOCATOR
552 select GENERIC_CLOCKEVENTS
555 select NEED_MACH_GPIO_H
560 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
563 bool "Micrel/Kendin KS8695"
564 select ARCH_REQUIRE_GPIOLIB
567 select GENERIC_CLOCKEVENTS
568 select NEED_MACH_MEMORY_H
570 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
571 System-on-Chip devices.
574 bool "Nuvoton W90X900 CPU"
575 select ARCH_REQUIRE_GPIOLIB
579 select GENERIC_CLOCKEVENTS
581 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
582 At present, the w90x900 has been renamed nuc900, regarding
583 the ARM series product line, you can login the following
584 link address to know more.
586 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
587 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
591 select ARCH_REQUIRE_GPIOLIB
596 select GENERIC_CLOCKEVENTS
599 select USB_ARCH_HAS_OHCI
602 Support for the NXP LPC32XX family of processors
605 bool "PXA2xx/PXA3xx-based"
607 select ARCH_HAS_CPUFREQ
609 select ARCH_REQUIRE_GPIOLIB
610 select ARM_CPU_SUSPEND if PM
614 select GENERIC_CLOCKEVENTS
617 select MULTI_IRQ_HANDLER
618 select NEED_MACH_GPIO_H
622 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
626 select ARCH_REQUIRE_GPIOLIB
628 select GENERIC_CLOCKEVENTS
631 Support for Qualcomm MSM/QSD based systems. This runs on the
632 apps processor of the MSM/QSD and depends on a shared memory
633 interface to the modem processor which runs the baseband
634 stack and controls some vital subsystems
635 (clock and power control, etc).
638 bool "Renesas SH-Mobile / R-Mobile"
640 select GENERIC_CLOCKEVENTS
641 select HAVE_ARM_SCU if SMP
642 select HAVE_ARM_TWD if LOCAL_TIMERS
644 select HAVE_MACH_CLKDEV
646 select MIGHT_HAVE_CACHE_L2X0
647 select MULTI_IRQ_HANDLER
648 select NEED_MACH_MEMORY_H
650 select PINCTRL if ARCH_WANT_OPTIONAL_GPIOLIB
651 select PM_GENERIC_DOMAINS if PM
654 Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
659 select ARCH_MAY_HAVE_PC_FDC
660 select ARCH_SPARSEMEM_ENABLE
661 select ARCH_USES_GETTIMEOFFSET
664 select HAVE_PATA_PLATFORM
666 select NEED_MACH_IO_H
667 select NEED_MACH_MEMORY_H
671 On the Acorn Risc-PC, Linux can support the internal IDE disk and
672 CD-ROM interface, serial and parallel port, and the floppy drive.
676 select ARCH_HAS_CPUFREQ
678 select ARCH_REQUIRE_GPIOLIB
679 select ARCH_SPARSEMEM_ENABLE
684 select GENERIC_CLOCKEVENTS
687 select NEED_MACH_GPIO_H
688 select NEED_MACH_MEMORY_H
691 Support for StrongARM 11x0 based boards.
694 bool "Samsung S3C24XX SoCs"
695 select ARCH_HAS_CPUFREQ
696 select ARCH_REQUIRE_GPIOLIB
699 select GENERIC_CLOCKEVENTS
701 select HAVE_S3C2410_I2C if I2C
702 select HAVE_S3C2410_WATCHDOG if WATCHDOG
703 select HAVE_S3C_RTC if RTC_CLASS
704 select MULTI_IRQ_HANDLER
705 select NEED_MACH_GPIO_H
706 select NEED_MACH_IO_H
708 Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
709 and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
710 (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
711 Samsung SMDK2410 development board (and derivatives).
714 bool "Samsung S3C64XX"
715 select ARCH_HAS_CPUFREQ
716 select ARCH_REQUIRE_GPIOLIB
721 select GENERIC_CLOCKEVENTS
723 select HAVE_S3C2410_I2C if I2C
724 select HAVE_S3C2410_WATCHDOG if WATCHDOG
726 select NEED_MACH_GPIO_H
730 select S3C_GPIO_TRACK
731 select SAMSUNG_CLKSRC
732 select SAMSUNG_GPIOLIB_4BIT
733 select SAMSUNG_IRQ_VIC_TIMER
734 select USB_ARCH_HAS_OHCI
736 Samsung S3C64XX series based systems
739 bool "Samsung S5P6440 S5P6450"
743 select GENERIC_CLOCKEVENTS
745 select HAVE_S3C2410_I2C if I2C
746 select HAVE_S3C2410_WATCHDOG if WATCHDOG
747 select HAVE_S3C_RTC if RTC_CLASS
748 select NEED_MACH_GPIO_H
750 Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
754 bool "Samsung S5PC100"
755 select ARCH_REQUIRE_GPIOLIB
759 select GENERIC_CLOCKEVENTS
761 select HAVE_S3C2410_I2C if I2C
762 select HAVE_S3C2410_WATCHDOG if WATCHDOG
763 select HAVE_S3C_RTC if RTC_CLASS
764 select NEED_MACH_GPIO_H
766 Samsung S5PC100 series based systems
769 bool "Samsung S5PV210/S5PC110"
770 select ARCH_HAS_CPUFREQ
771 select ARCH_HAS_HOLES_MEMORYMODEL
772 select ARCH_SPARSEMEM_ENABLE
776 select GENERIC_CLOCKEVENTS
778 select HAVE_S3C2410_I2C if I2C
779 select HAVE_S3C2410_WATCHDOG if WATCHDOG
780 select HAVE_S3C_RTC if RTC_CLASS
781 select NEED_MACH_GPIO_H
782 select NEED_MACH_MEMORY_H
784 Samsung S5PV210/S5PC110 series based systems
787 bool "Samsung EXYNOS"
788 select ARCH_HAS_CPUFREQ
789 select ARCH_HAS_HOLES_MEMORYMODEL
790 select ARCH_SPARSEMEM_ENABLE
794 select GENERIC_CLOCKEVENTS
796 select HAVE_S3C2410_I2C if I2C
797 select HAVE_S3C2410_WATCHDOG if WATCHDOG
798 select HAVE_S3C_RTC if RTC_CLASS
799 select NEED_MACH_GPIO_H
800 select NEED_MACH_MEMORY_H
802 Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
806 select ARCH_USES_GETTIMEOFFSET
810 select NEED_MACH_MEMORY_H
815 Support for the StrongARM based Digital DNARD machine, also known
816 as "Shark" (<http://www.shark-linux.de/shark.html>).
819 bool "ST-Ericsson U300 Series"
821 select ARCH_REQUIRE_GPIOLIB
823 select ARM_PATCH_PHYS_VIRT
829 select GENERIC_CLOCKEVENTS
833 Support for ST-Ericsson U300 series mobile platforms.
837 select ARCH_HAS_HOLES_MEMORYMODEL
838 select ARCH_REQUIRE_GPIOLIB
840 select GENERIC_ALLOCATOR
841 select GENERIC_CLOCKEVENTS
842 select GENERIC_IRQ_CHIP
844 select NEED_MACH_GPIO_H
848 Support for TI's DaVinci platform.
853 select ARCH_HAS_CPUFREQ
854 select ARCH_HAS_HOLES_MEMORYMODEL
856 select ARCH_REQUIRE_GPIOLIB
859 select GENERIC_CLOCKEVENTS
860 select GENERIC_IRQ_CHIP
864 select NEED_MACH_IO_H if PCCARD
865 select NEED_MACH_MEMORY_H
867 Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
871 menu "Multiple platform selection"
872 depends on ARCH_MULTIPLATFORM
874 comment "CPU Core family selection"
877 bool "ARMv4 based platforms (FA526, StrongARM)"
878 depends on !ARCH_MULTI_V6_V7
879 select ARCH_MULTI_V4_V5
881 config ARCH_MULTI_V4T
882 bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
883 depends on !ARCH_MULTI_V6_V7
884 select ARCH_MULTI_V4_V5
887 bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
888 depends on !ARCH_MULTI_V6_V7
889 select ARCH_MULTI_V4_V5
891 config ARCH_MULTI_V4_V5
895 bool "ARMv6 based platforms (ARM11)"
896 select ARCH_MULTI_V6_V7
900 bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
902 select ARCH_MULTI_V6_V7
905 config ARCH_MULTI_V6_V7
908 config ARCH_MULTI_CPU_AUTO
909 def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
915 # This is sorted alphabetically by mach-* pathname. However, plat-*
916 # Kconfigs may be included either alphabetically (according to the
917 # plat- suffix) or along side the corresponding mach-* source.
919 source "arch/arm/mach-mvebu/Kconfig"
921 source "arch/arm/mach-at91/Kconfig"
923 source "arch/arm/mach-bcm/Kconfig"
925 source "arch/arm/mach-bcm2835/Kconfig"
927 source "arch/arm/mach-clps711x/Kconfig"
929 source "arch/arm/mach-cns3xxx/Kconfig"
931 source "arch/arm/mach-davinci/Kconfig"
933 source "arch/arm/mach-dove/Kconfig"
935 source "arch/arm/mach-ep93xx/Kconfig"
937 source "arch/arm/mach-footbridge/Kconfig"
939 source "arch/arm/mach-gemini/Kconfig"
941 source "arch/arm/mach-highbank/Kconfig"
943 source "arch/arm/mach-integrator/Kconfig"
945 source "arch/arm/mach-iop32x/Kconfig"
947 source "arch/arm/mach-iop33x/Kconfig"
949 source "arch/arm/mach-iop13xx/Kconfig"
951 source "arch/arm/mach-ixp4xx/Kconfig"
953 source "arch/arm/mach-kirkwood/Kconfig"
955 source "arch/arm/mach-ks8695/Kconfig"
957 source "arch/arm/mach-msm/Kconfig"
959 source "arch/arm/mach-mv78xx0/Kconfig"
961 source "arch/arm/mach-imx/Kconfig"
963 source "arch/arm/mach-mxs/Kconfig"
965 source "arch/arm/mach-netx/Kconfig"
967 source "arch/arm/mach-nomadik/Kconfig"
969 source "arch/arm/plat-omap/Kconfig"
971 source "arch/arm/mach-omap1/Kconfig"
973 source "arch/arm/mach-omap2/Kconfig"
975 source "arch/arm/mach-orion5x/Kconfig"
977 source "arch/arm/mach-picoxcell/Kconfig"
979 source "arch/arm/mach-pxa/Kconfig"
980 source "arch/arm/plat-pxa/Kconfig"
982 source "arch/arm/mach-mmp/Kconfig"
984 source "arch/arm/mach-realview/Kconfig"
986 source "arch/arm/mach-sa1100/Kconfig"
988 source "arch/arm/plat-samsung/Kconfig"
990 source "arch/arm/mach-socfpga/Kconfig"
992 source "arch/arm/mach-spear/Kconfig"
994 source "arch/arm/mach-s3c24xx/Kconfig"
997 source "arch/arm/mach-s3c64xx/Kconfig"
1000 source "arch/arm/mach-s5p64x0/Kconfig"
1002 source "arch/arm/mach-s5pc100/Kconfig"
1004 source "arch/arm/mach-s5pv210/Kconfig"
1006 source "arch/arm/mach-exynos/Kconfig"
1008 source "arch/arm/mach-shmobile/Kconfig"
1010 source "arch/arm/mach-sunxi/Kconfig"
1012 source "arch/arm/mach-prima2/Kconfig"
1014 source "arch/arm/mach-tegra/Kconfig"
1016 source "arch/arm/mach-u300/Kconfig"
1018 source "arch/arm/mach-ux500/Kconfig"
1020 source "arch/arm/mach-versatile/Kconfig"
1022 source "arch/arm/mach-vexpress/Kconfig"
1023 source "arch/arm/plat-versatile/Kconfig"
1025 source "arch/arm/mach-virt/Kconfig"
1027 source "arch/arm/mach-vt8500/Kconfig"
1029 source "arch/arm/mach-w90x900/Kconfig"
1031 source "arch/arm/mach-zynq/Kconfig"
1033 # Definitions to make life easier
1039 select GENERIC_CLOCKEVENTS
1045 select GENERIC_IRQ_CHIP
1048 config PLAT_ORION_LEGACY
1055 config PLAT_VERSATILE
1058 config ARM_TIMER_SP804
1061 select CLKSRC_OF if OF
1063 source arch/arm/mm/Kconfig
1067 default 16 if ARCH_EP93XX
1071 bool "Enable iWMMXt support" if !CPU_PJ4
1072 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1073 default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4
1075 Enable support for iWMMXt context switching at run time if
1076 running on a CPU that supports it.
1080 depends on CPU_XSCALE
1083 config MULTI_IRQ_HANDLER
1086 Allow each machine to specify it's own IRQ handler at run time.
1089 source "arch/arm/Kconfig-nommu"
1092 config PJ4B_ERRATA_4742
1093 bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
1094 depends on CPU_PJ4B && MACH_ARMADA_370
1097 When coming out of either a Wait for Interrupt (WFI) or a Wait for
1098 Event (WFE) IDLE states, a specific timing sensitivity exists between
1099 the retiring WFI/WFE instructions and the newly issued subsequent
1100 instructions. This sensitivity can result in a CPU hang scenario.
1102 The software must insert either a Data Synchronization Barrier (DSB)
1103 or Data Memory Barrier (DMB) command immediately after the WFI/WFE
1106 config ARM_ERRATA_326103
1107 bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
1110 Executing a SWP instruction to read-only memory does not set bit 11
1111 of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
1112 treat the access as a read, preventing a COW from occurring and
1113 causing the faulting task to livelock.
1115 config ARM_ERRATA_411920
1116 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1117 depends on CPU_V6 || CPU_V6K
1119 Invalidation of the Instruction Cache operation can
1120 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1121 It does not affect the MPCore. This option enables the ARM Ltd.
1122 recommended workaround.
1124 config ARM_ERRATA_430973
1125 bool "ARM errata: Stale prediction on replaced interworking branch"
1128 This option enables the workaround for the 430973 Cortex-A8
1129 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1130 interworking branch is replaced with another code sequence at the
1131 same virtual address, whether due to self-modifying code or virtual
1132 to physical address re-mapping, Cortex-A8 does not recover from the
1133 stale interworking branch prediction. This results in Cortex-A8
1134 executing the new code sequence in the incorrect ARM or Thumb state.
1135 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1136 and also flushes the branch target cache at every context switch.
1137 Note that setting specific bits in the ACTLR register may not be
1138 available in non-secure mode.
1140 config ARM_ERRATA_458693
1141 bool "ARM errata: Processor deadlock when a false hazard is created"
1143 depends on !ARCH_MULTIPLATFORM
1145 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1146 erratum. For very specific sequences of memory operations, it is
1147 possible for a hazard condition intended for a cache line to instead
1148 be incorrectly associated with a different cache line. This false
1149 hazard might then cause a processor deadlock. The workaround enables
1150 the L1 caching of the NEON accesses and disables the PLD instruction
1151 in the ACTLR register. Note that setting specific bits in the ACTLR
1152 register may not be available in non-secure mode.
1154 config ARM_ERRATA_460075
1155 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1157 depends on !ARCH_MULTIPLATFORM
1159 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1160 erratum. Any asynchronous access to the L2 cache may encounter a
1161 situation in which recent store transactions to the L2 cache are lost
1162 and overwritten with stale memory contents from external memory. The
1163 workaround disables the write-allocate mode for the L2 cache via the
1164 ACTLR register. Note that setting specific bits in the ACTLR register
1165 may not be available in non-secure mode.
1167 config ARM_ERRATA_742230
1168 bool "ARM errata: DMB operation may be faulty"
1169 depends on CPU_V7 && SMP
1170 depends on !ARCH_MULTIPLATFORM
1172 This option enables the workaround for the 742230 Cortex-A9
1173 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1174 between two write operations may not ensure the correct visibility
1175 ordering of the two writes. This workaround sets a specific bit in
1176 the diagnostic register of the Cortex-A9 which causes the DMB
1177 instruction to behave as a DSB, ensuring the correct behaviour of
1180 config ARM_ERRATA_742231
1181 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1182 depends on CPU_V7 && SMP
1183 depends on !ARCH_MULTIPLATFORM
1185 This option enables the workaround for the 742231 Cortex-A9
1186 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1187 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1188 accessing some data located in the same cache line, may get corrupted
1189 data due to bad handling of the address hazard when the line gets
1190 replaced from one of the CPUs at the same time as another CPU is
1191 accessing it. This workaround sets specific bits in the diagnostic
1192 register of the Cortex-A9 which reduces the linefill issuing
1193 capabilities of the processor.
1195 config PL310_ERRATA_588369
1196 bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
1197 depends on CACHE_L2X0
1199 The PL310 L2 cache controller implements three types of Clean &
1200 Invalidate maintenance operations: by Physical Address
1201 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1202 They are architecturally defined to behave as the execution of a
1203 clean operation followed immediately by an invalidate operation,
1204 both performing to the same memory location. This functionality
1205 is not correctly implemented in PL310 as clean lines are not
1206 invalidated as a result of these operations.
1208 config ARM_ERRATA_643719
1209 bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
1210 depends on CPU_V7 && SMP
1212 This option enables the workaround for the 643719 Cortex-A9 (prior to
1213 r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
1214 register returns zero when it should return one. The workaround
1215 corrects this value, ensuring cache maintenance operations which use
1216 it behave as intended and avoiding data corruption.
1218 config ARM_ERRATA_720789
1219 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1222 This option enables the workaround for the 720789 Cortex-A9 (prior to
1223 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1224 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1225 As a consequence of this erratum, some TLB entries which should be
1226 invalidated are not, resulting in an incoherency in the system page
1227 tables. The workaround changes the TLB flushing routines to invalidate
1228 entries regardless of the ASID.
1230 config PL310_ERRATA_727915
1231 bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
1232 depends on CACHE_L2X0
1234 PL310 implements the Clean & Invalidate by Way L2 cache maintenance
1235 operation (offset 0x7FC). This operation runs in background so that
1236 PL310 can handle normal accesses while it is in progress. Under very
1237 rare circumstances, due to this erratum, write data can be lost when
1238 PL310 treats a cacheable write transaction during a Clean &
1239 Invalidate by Way operation.
1241 config ARM_ERRATA_743622
1242 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1244 depends on !ARCH_MULTIPLATFORM
1246 This option enables the workaround for the 743622 Cortex-A9
1247 (r2p*) erratum. Under very rare conditions, a faulty
1248 optimisation in the Cortex-A9 Store Buffer may lead to data
1249 corruption. This workaround sets a specific bit in the diagnostic
1250 register of the Cortex-A9 which disables the Store Buffer
1251 optimisation, preventing the defect from occurring. This has no
1252 visible impact on the overall performance or power consumption of the
1255 config ARM_ERRATA_751472
1256 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1258 depends on !ARCH_MULTIPLATFORM
1260 This option enables the workaround for the 751472 Cortex-A9 (prior
1261 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1262 completion of a following broadcasted operation if the second
1263 operation is received by a CPU before the ICIALLUIS has completed,
1264 potentially leading to corrupted entries in the cache or TLB.
1266 config PL310_ERRATA_753970
1267 bool "PL310 errata: cache sync operation may be faulty"
1268 depends on CACHE_PL310
1270 This option enables the workaround for the 753970 PL310 (r3p0) erratum.
1272 Under some condition the effect of cache sync operation on
1273 the store buffer still remains when the operation completes.
1274 This means that the store buffer is always asked to drain and
1275 this prevents it from merging any further writes. The workaround
1276 is to replace the normal offset of cache sync operation (0x730)
1277 by another offset targeting an unmapped PL310 register 0x740.
1278 This has the same effect as the cache sync operation: store buffer
1279 drain and waiting for all buffers empty.
1281 config ARM_ERRATA_754322
1282 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1285 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1286 r3p*) erratum. A speculative memory access may cause a page table walk
1287 which starts prior to an ASID switch but completes afterwards. This
1288 can populate the micro-TLB with a stale entry which may be hit with
1289 the new ASID. This workaround places two dsb instructions in the mm
1290 switching code so that no page table walks can cross the ASID switch.
1292 config ARM_ERRATA_754327
1293 bool "ARM errata: no automatic Store Buffer drain"
1294 depends on CPU_V7 && SMP
1296 This option enables the workaround for the 754327 Cortex-A9 (prior to
1297 r2p0) erratum. The Store Buffer does not have any automatic draining
1298 mechanism and therefore a livelock may occur if an external agent
1299 continuously polls a memory location waiting to observe an update.
1300 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1301 written polling loops from denying visibility of updates to memory.
1303 config ARM_ERRATA_364296
1304 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1305 depends on CPU_V6 && !SMP
1307 This options enables the workaround for the 364296 ARM1136
1308 r0p2 erratum (possible cache data corruption with
1309 hit-under-miss enabled). It sets the undocumented bit 31 in
1310 the auxiliary control register and the FI bit in the control
1311 register, thus disabling hit-under-miss without putting the
1312 processor into full low interrupt latency mode. ARM11MPCore
1315 config ARM_ERRATA_764369
1316 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1317 depends on CPU_V7 && SMP
1319 This option enables the workaround for erratum 764369
1320 affecting Cortex-A9 MPCore with two or more processors (all
1321 current revisions). Under certain timing circumstances, a data
1322 cache line maintenance operation by MVA targeting an Inner
1323 Shareable memory region may fail to proceed up to either the
1324 Point of Coherency or to the Point of Unification of the
1325 system. This workaround adds a DSB instruction before the
1326 relevant cache maintenance functions and sets a specific bit
1327 in the diagnostic control register of the SCU.
1329 config PL310_ERRATA_769419
1330 bool "PL310 errata: no automatic Store Buffer drain"
1331 depends on CACHE_L2X0
1333 On revisions of the PL310 prior to r3p2, the Store Buffer does
1334 not automatically drain. This can cause normal, non-cacheable
1335 writes to be retained when the memory system is idle, leading
1336 to suboptimal I/O performance for drivers using coherent DMA.
1337 This option adds a write barrier to the cpu_idle loop so that,
1338 on systems with an outer cache, the store buffer is drained
1341 config ARM_ERRATA_775420
1342 bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
1345 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
1346 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
1347 operation aborts with MMU exception, it might cause the processor
1348 to deadlock. This workaround puts DSB before executing ISB if
1349 an abort may occur on cache maintenance.
1351 config ARM_ERRATA_798181
1352 bool "ARM errata: TLBI/DSB failure on Cortex-A15"
1353 depends on CPU_V7 && SMP
1355 On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
1356 adequately shooting down all use of the old entries. This
1357 option enables the Linux kernel workaround for this erratum
1358 which sends an IPI to the CPUs that are running the same ASID
1359 as the one being invalidated.
1363 source "arch/arm/common/Kconfig"
1373 Find out whether you have ISA slots on your motherboard. ISA is the
1374 name of a bus system, i.e. the way the CPU talks to the other stuff
1375 inside your box. Other bus systems are PCI, EISA, MicroChannel
1376 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1377 newer boards don't support it. If you have ISA, say Y, otherwise N.
1379 # Select ISA DMA controller support
1384 # Select ISA DMA interface
1389 bool "PCI support" if MIGHT_HAVE_PCI
1391 Find out whether you have a PCI motherboard. PCI is the name of a
1392 bus system, i.e. the way the CPU talks to the other stuff inside
1393 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1394 VESA. If you have PCI, say Y, otherwise N.
1400 config PCI_NANOENGINE
1401 bool "BSE nanoEngine PCI support"
1402 depends on SA1100_NANOENGINE
1404 Enable PCI on the BSE nanoEngine board.
1409 # Select the host bridge type
1410 config PCI_HOST_VIA82C505
1412 depends on PCI && ARCH_SHARK
1415 config PCI_HOST_ITE8152
1417 depends on PCI && MACH_ARMCORE
1421 source "drivers/pci/Kconfig"
1423 source "drivers/pcmcia/Kconfig"
1427 menu "Kernel Features"
1432 This option should be selected by machines which have an SMP-
1435 The only effect of this option is to make the SMP-related
1436 options available to the user for configuration.
1439 bool "Symmetric Multi-Processing"
1440 depends on CPU_V6K || CPU_V7
1441 depends on GENERIC_CLOCKEVENTS
1444 select USE_GENERIC_SMP_HELPERS
1446 This enables support for systems with more than one CPU. If you have
1447 a system with only one CPU, like most personal computers, say N. If
1448 you have a system with more than one CPU, say Y.
1450 If you say N here, the kernel will run on single and multiprocessor
1451 machines, but will use only one CPU of a multiprocessor machine. If
1452 you say Y here, the kernel will run on many, but not all, single
1453 processor machines. On a single processor machine, the kernel will
1454 run faster if you say N here.
1456 See also <file:Documentation/x86/i386/IO-APIC.txt>,
1457 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1458 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1460 If you don't know what to do here, say N.
1463 bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1464 depends on SMP && !XIP_KERNEL
1467 SMP kernels contain instructions which fail on non-SMP processors.
1468 Enabling this option allows the kernel to modify itself to make
1469 these instructions safe. Disabling it allows about 1K of space
1472 If you don't know what to do here, say Y.
1474 config ARM_CPU_TOPOLOGY
1475 bool "Support cpu topology definition"
1476 depends on SMP && CPU_V7
1479 Support ARM cpu topology definition. The MPIDR register defines
1480 affinity between processors which is then used to describe the cpu
1481 topology of an ARM System.
1484 bool "Multi-core scheduler support"
1485 depends on ARM_CPU_TOPOLOGY
1487 Multi-core scheduler support improves the CPU scheduler's decision
1488 making when dealing with multi-core CPU chips at a cost of slightly
1489 increased overhead in some places. If unsure say N here.
1492 bool "SMT scheduler support"
1493 depends on ARM_CPU_TOPOLOGY
1495 Improves the CPU scheduler's decision making when dealing with
1496 MultiThreading at a cost of slightly increased overhead in some
1497 places. If unsure say N here.
1499 config DISABLE_CPU_SCHED_DOMAIN_BALANCE
1500 bool "(EXPERIMENTAL) Disable CPU level scheduler load-balancing"
1502 Disables scheduler load-balancing at CPU sched domain level.
1505 bool "(EXPERIMENTAL) Heterogenous multiprocessor scheduling"
1506 depends on DISABLE_CPU_SCHED_DOMAIN_BALANCE && SCHED_MC && FAIR_GROUP_SCHED && !SCHED_AUTOGROUP
1508 Experimental scheduler optimizations for heterogeneous platforms.
1509 Attempts to introspectively select task affinity to optimize power
1510 and performance. Basic support for multiple (>2) cpu types is in place,
1511 but it has only been tested with two types of cpus.
1512 There is currently no support for migration of task groups, hence
1513 !SCHED_AUTOGROUP. Furthermore, normal load-balancing must be disabled
1514 between cpus of different type (DISABLE_CPU_SCHED_DOMAIN_BALANCE).
1515 When turned on, this option adds sys/kernel/hmp directory which
1516 contains the following files:
1517 up_threshold - the load average threshold used for up migration
1519 down_threshold - the load average threshold used for down migration
1521 hmp_domains - a list of cpumasks for the present HMP domains,
1522 starting with the 'biggest' and ending with the
1524 Note that both the threshold files can be written at runtime to
1525 control scheduler behaviour.
1527 config SCHED_HMP_PRIO_FILTER
1528 bool "(EXPERIMENTAL) Filter HMP migrations by task priority"
1529 depends on SCHED_HMP
1531 Enables task priority based HMP migration filter. Any task with
1532 a NICE value above the threshold will always be on low-power cpus
1533 with less compute capacity.
1535 config SCHED_HMP_PRIO_FILTER_VAL
1536 int "NICE priority threshold"
1538 depends on SCHED_HMP_PRIO_FILTER
1540 config HMP_FAST_CPU_MASK
1541 string "HMP scheduler fast CPU mask"
1542 depends on SCHED_HMP
1544 Leave empty to use device tree information.
1545 Specify the cpuids of the fast CPUs in the system as a list string,
1546 e.g. cpuid 0+1 should be specified as 0-1.
1548 config HMP_SLOW_CPU_MASK
1549 string "HMP scheduler slow CPU mask"
1550 depends on SCHED_HMP
1552 Leave empty to use device tree information.
1553 Specify the cpuids of the slow CPUs in the system as a list string,
1554 e.g. cpuid 0+1 should be specified as 0-1.
1556 config HMP_VARIABLE_SCALE
1557 bool "Allows changing the load tracking scale through sysfs"
1558 depends on SCHED_HMP
1560 When turned on, this option exports the load average period value
1561 for the load tracking patches through sysfs.
1562 The values can be modified to change the rate of load accumulation
1563 used for HMP migration. 'load_avg_period_ms' is the time in ms to
1564 reach a load average of 0.5 for an idle task of 0 load average
1565 ratio which becomes 100% busy.
1566 For example, with load_avg_period_ms = 128 and up_threshold = 512,
1567 a running task with a load of 0 will be migrated to a bigger CPU after
1568 128ms, because after 128ms its load_avg_ratio is 0.5 and the real
1569 up_threshold is 0.5.
1570 This patch has the same behavior as changing the Y of the load
1571 average computation to
1572 (1002/1024)^(LOAD_AVG_PERIOD/load_avg_period_ms)
1573 but removes intermediate overflows in computation.
1575 config HMP_FREQUENCY_INVARIANT_SCALE
1576 bool "(EXPERIMENTAL) Frequency-Invariant Tracked Load for HMP"
1577 depends on SCHED_HMP && CPU_FREQ
1579 Scales the current load contribution in line with the frequency
1580 of the CPU that the task was executed on.
1581 In this version, we use a simple linear scale derived from the
1582 maximum frequency reported by CPUFreq.
1583 Restricting tracked load to be scaled by the CPU's frequency
1584 represents the consumption of possible compute capacity
1585 (rather than consumption of actual instantaneous capacity as
1586 normal) and allows the HMP migration's simple threshold
1587 migration strategy to interact more predictably with CPUFreq's
1588 asynchronous compute capacity changes.
1590 config SCHED_HMP_LITTLE_PACKING
1591 bool "Small task packing for HMP"
1592 depends on SCHED_HMP
1595 Allows the HMP Scheduler to pack small tasks into CPUs in the
1596 smallest HMP domain.
1597 Controlled by two sysfs files in sys/kernel/hmp.
1598 packing_enable: 1 to enable, 0 to disable packing. Default 1.
1599 packing_limit: runqueue load ratio where a RQ is considered
1600 to be full. Default is NICE_0_LOAD * 9/8.
1605 This option enables support for the ARM system coherency unit
1607 config HAVE_ARM_ARCH_TIMER
1608 bool "Architected timer support"
1610 select ARM_ARCH_TIMER
1612 This option enables support for the ARM architected timer
1617 select CLKSRC_OF if OF
1619 This options enables support for the ARM timer and watchdog unit
1622 bool "Multi-Cluster Power Management"
1623 depends on CPU_V7 && SMP
1625 This option provides the common power management infrastructure
1626 for (multi-)cluster based systems, such as big.LITTLE based
1630 bool "big.LITTLE support (Experimental)"
1631 depends on CPU_V7 && SMP
1634 This option enables support for the big.LITTLE architecture.
1637 bool "big.LITTLE switcher support"
1638 depends on BIG_LITTLE && MCPM && HOTPLUG_CPU
1640 select ARM_CPU_SUSPEND
1642 The big.LITTLE "switcher" provides the core functionality to
1643 transparently handle transition between a cluster of A15's
1644 and a cluster of A7's in a big.LITTLE system.
1646 config BL_SWITCHER_DUMMY_IF
1647 tristate "Simple big.LITTLE switcher user interface"
1648 depends on BL_SWITCHER && DEBUG_KERNEL
1650 This is a simple and dummy char dev interface to control
1651 the big.LITTLE switcher core code. It is meant for
1652 debugging purposes only.
1655 prompt "Memory split"
1658 Select the desired split between kernel and user memory.
1660 If you are not absolutely sure what you are doing, leave this
1664 bool "3G/1G user/kernel split"
1666 bool "2G/2G user/kernel split"
1668 bool "1G/3G user/kernel split"
1673 default 0x40000000 if VMSPLIT_1G
1674 default 0x80000000 if VMSPLIT_2G
1678 int "Maximum number of CPUs (2-32)"
1684 bool "Support for hot-pluggable CPUs"
1685 depends on SMP && HOTPLUG
1687 Say Y here to experiment with turning CPUs off and on. CPUs
1688 can be controlled through /sys/devices/system/cpu.
1691 bool "Support for the ARM Power State Coordination Interface (PSCI)"
1694 Say Y here if you want Linux to communicate with system firmware
1695 implementing the PSCI specification for CPU-centric power
1696 management operations described in ARM document number ARM DEN
1697 0022A ("Power State Coordination Interface System Software on
1701 bool "Use local timer interrupts"
1705 Enable support for local timers on SMP platforms, rather then the
1706 legacy IPI broadcast method. Local timers allows the system
1707 accounting to be spread across the timer interval, preventing a
1708 "thundering herd" at every timer tick.
1710 # The GPIO number here must be sorted by descending number. In case of
1711 # a multiplatform kernel, we just want the highest value required by the
1712 # selected platforms.
1715 default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1716 default 512 if SOC_OMAP5
1717 default 392 if ARCH_U8500
1718 default 352 if ARCH_VT8500
1719 default 288 if ARCH_SUNXI
1720 default 264 if MACH_H4700
1723 Maximum number of GPIOs in the system.
1725 If unsure, leave the default value.
1727 source kernel/Kconfig.preempt
1731 default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
1732 ARCH_S5PV210 || ARCH_EXYNOS4
1733 default AT91_TIMER_HZ if ARCH_AT91
1734 default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1738 def_bool HIGH_RES_TIMERS
1740 config THUMB2_KERNEL
1741 bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
1742 depends on CPU_V7 && !CPU_V6 && !CPU_V6K
1743 default y if CPU_THUMBONLY
1745 select ARM_ASM_UNIFIED
1748 By enabling this option, the kernel will be compiled in
1749 Thumb-2 mode. A compiler/assembler that understand the unified
1750 ARM-Thumb syntax is needed.
1754 config THUMB2_AVOID_R_ARM_THM_JUMP11
1755 bool "Work around buggy Thumb-2 short branch relocations in gas"
1756 depends on THUMB2_KERNEL && MODULES
1759 Various binutils versions can resolve Thumb-2 branches to
1760 locally-defined, preemptible global symbols as short-range "b.n"
1761 branch instructions.
1763 This is a problem, because there's no guarantee the final
1764 destination of the symbol, or any candidate locations for a
1765 trampoline, are within range of the branch. For this reason, the
1766 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1767 relocation in modules at all, and it makes little sense to add
1770 The symptom is that the kernel fails with an "unsupported
1771 relocation" error when loading some modules.
1773 Until fixed tools are available, passing
1774 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1775 code which hits this problem, at the cost of a bit of extra runtime
1776 stack usage in some cases.
1778 The problem is described in more detail at:
1779 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1781 Only Thumb-2 kernels are affected.
1783 Unless you are sure your tools don't have this problem, say Y.
1785 config ARM_ASM_UNIFIED
1789 bool "Use the ARM EABI to compile the kernel"
1791 This option allows for the kernel to be compiled using the latest
1792 ARM ABI (aka EABI). This is only useful if you are using a user
1793 space environment that is also compiled with EABI.
1795 Since there are major incompatibilities between the legacy ABI and
1796 EABI, especially with regard to structure member alignment, this
1797 option also changes the kernel syscall calling convention to
1798 disambiguate both ABIs and allow for backward compatibility support
1799 (selected with CONFIG_OABI_COMPAT).
1801 To use this you need GCC version 4.0.0 or later.
1804 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1805 depends on AEABI && !THUMB2_KERNEL
1808 This option preserves the old syscall interface along with the
1809 new (ARM EABI) one. It also provides a compatibility layer to
1810 intercept syscalls that have structure arguments which layout
1811 in memory differs between the legacy ABI and the new ARM EABI
1812 (only for non "thumb" binaries). This option adds a tiny
1813 overhead to all syscalls and produces a slightly larger kernel.
1814 If you know you'll be using only pure EABI user space then you
1815 can say N here. If this option is not selected and you attempt
1816 to execute a legacy ABI binary then the result will be
1817 UNPREDICTABLE (in fact it can be predicted that it won't work
1818 at all). If in doubt say Y.
1820 config ARCH_HAS_HOLES_MEMORYMODEL
1823 config ARCH_SPARSEMEM_ENABLE
1826 config ARCH_SPARSEMEM_DEFAULT
1827 def_bool ARCH_SPARSEMEM_ENABLE
1829 config ARCH_SELECT_MEMORY_MODEL
1830 def_bool ARCH_SPARSEMEM_ENABLE
1832 config HAVE_ARCH_PFN_VALID
1833 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1836 bool "High Memory Support"
1839 The address space of ARM processors is only 4 Gigabytes large
1840 and it has to accommodate user address space, kernel address
1841 space as well as some memory mapped IO. That means that, if you
1842 have a large amount of physical memory and/or IO, not all of the
1843 memory can be "permanently mapped" by the kernel. The physical
1844 memory that is not permanently mapped is called "high memory".
1846 Depending on the selected kernel/user memory split, minimum
1847 vmalloc space and actual amount of RAM, you may not need this
1848 option which should result in a slightly faster kernel.
1853 bool "Allocate 2nd-level pagetables from highmem"
1856 config HW_PERF_EVENTS
1857 bool "Enable hardware performance counter support for perf events"
1858 depends on PERF_EVENTS
1861 Enable hardware performance counter support for perf events. If
1862 disabled, perf events will use software events only.
1864 config SYS_SUPPORTS_HUGETLBFS
1868 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
1874 config FORCE_MAX_ZONEORDER
1875 int "Maximum zone order" if ARCH_SHMOBILE
1876 range 11 64 if ARCH_SHMOBILE
1877 default "12" if SOC_AM33XX
1878 default "9" if SA1111
1881 The kernel memory allocator divides physically contiguous memory
1882 blocks into "zones", where each zone is a power of two number of
1883 pages. This option selects the largest power of two that the kernel
1884 keeps in the memory allocator. If you need to allocate very large
1885 blocks of physically contiguous memory, then you may need to
1886 increase this value.
1888 This config option is actually maximum order plus one. For example,
1889 a value of 11 means that the largest free memory block is 2^10 pages.
1891 config ALIGNMENT_TRAP
1893 depends on CPU_CP15_MMU
1894 default y if !ARCH_EBSA110
1895 select HAVE_PROC_CPU if PROC_FS
1897 ARM processors cannot fetch/store information which is not
1898 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1899 address divisible by 4. On 32-bit ARM processors, these non-aligned
1900 fetch/store instructions will be emulated in software if you say
1901 here, which has a severe performance impact. This is necessary for
1902 correct operation of some network protocols. With an IP-only
1903 configuration it is safe to say N, otherwise say Y.
1905 config UACCESS_WITH_MEMCPY
1906 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
1908 default y if CPU_FEROCEON
1910 Implement faster copy_to_user and clear_user methods for CPU
1911 cores where a 8-word STM instruction give significantly higher
1912 memory write throughput than a sequence of individual 32bit stores.
1914 A possible side effect is a slight increase in scheduling latency
1915 between threads sharing the same address space if they invoke
1916 such copy operations with large buffers.
1918 However, if the CPU data cache is using a write-allocate mode,
1919 this option is unlikely to provide any performance gain.
1923 prompt "Enable seccomp to safely compute untrusted bytecode"
1925 This kernel feature is useful for number crunching applications
1926 that may need to compute untrusted bytecode during their
1927 execution. By using pipes or other transports made available to
1928 the process as file descriptors supporting the read/write
1929 syscalls, it's possible to isolate those applications in
1930 their own address space using seccomp. Once seccomp is
1931 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1932 and the task is only allowed to execute a few safe syscalls
1933 defined by each seccomp mode.
1935 config CC_STACKPROTECTOR
1936 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1938 This option turns on the -fstack-protector GCC feature. This
1939 feature puts, at the beginning of functions, a canary value on
1940 the stack just before the return address, and validates
1941 the value just before actually returning. Stack based buffer
1942 overflows (that need to overwrite this return address) now also
1943 overwrite the canary, which gets detected and the attack is then
1944 neutralized via a kernel panic.
1945 This feature requires gcc version 4.2 or above.
1952 bool "Xen guest support on ARM (EXPERIMENTAL)"
1953 depends on ARM && AEABI && OF
1954 depends on CPU_V7 && !CPU_V6
1955 depends on !GENERIC_ATOMIC64
1958 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1965 bool "Flattened Device Tree support"
1968 select OF_EARLY_FLATTREE
1970 Include support for flattened device tree machine descriptions.
1973 bool "Support for the traditional ATAGS boot data passing" if USE_OF
1976 This is the traditional way of passing data to the kernel at boot
1977 time. If you are solely relying on the flattened device tree (or
1978 the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1979 to remove ATAGS support from your kernel binary. If unsure,
1982 config DEPRECATED_PARAM_STRUCT
1983 bool "Provide old way to pass kernel parameters"
1986 This was deprecated in 2001 and announced to live on for 5 years.
1987 Some old boot loaders still use this way.
1989 # Compressed boot loader in ROM. Yes, we really want to ask about
1990 # TEXT and BSS so we preserve their values in the config files.
1991 config ZBOOT_ROM_TEXT
1992 hex "Compressed ROM boot loader base address"
1995 The physical address at which the ROM-able zImage is to be
1996 placed in the target. Platforms which normally make use of
1997 ROM-able zImage formats normally set this to a suitable
1998 value in their defconfig file.
2000 If ZBOOT_ROM is not enabled, this has no effect.
2002 config ZBOOT_ROM_BSS
2003 hex "Compressed ROM boot loader BSS address"
2006 The base address of an area of read/write memory in the target
2007 for the ROM-able zImage which must be available while the
2008 decompressor is running. It must be large enough to hold the
2009 entire decompressed kernel plus an additional 128 KiB.
2010 Platforms which normally make use of ROM-able zImage formats
2011 normally set this to a suitable value in their defconfig file.
2013 If ZBOOT_ROM is not enabled, this has no effect.
2016 bool "Compressed boot loader in ROM/flash"
2017 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
2019 Say Y here if you intend to execute your compressed kernel image
2020 (zImage) directly from ROM or flash. If unsure, say N.
2023 prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
2024 depends on ZBOOT_ROM && ARCH_SH7372
2025 default ZBOOT_ROM_NONE
2027 Include experimental SD/MMC loading code in the ROM-able zImage.
2028 With this enabled it is possible to write the ROM-able zImage
2029 kernel image to an MMC or SD card and boot the kernel straight
2030 from the reset vector. At reset the processor Mask ROM will load
2031 the first part of the ROM-able zImage which in turn loads the
2032 rest the kernel image to RAM.
2034 config ZBOOT_ROM_NONE
2035 bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
2037 Do not load image from SD or MMC
2039 config ZBOOT_ROM_MMCIF
2040 bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
2042 Load image from MMCIF hardware block.
2044 config ZBOOT_ROM_SH_MOBILE_SDHI
2045 bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
2047 Load image from SDHI hardware block
2051 config ARM_APPENDED_DTB
2052 bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
2053 depends on OF && !ZBOOT_ROM
2055 With this option, the boot code will look for a device tree binary
2056 (DTB) appended to zImage
2057 (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
2059 This is meant as a backward compatibility convenience for those
2060 systems with a bootloader that can't be upgraded to accommodate
2061 the documented boot protocol using a device tree.
2063 Beware that there is very little in terms of protection against
2064 this option being confused by leftover garbage in memory that might
2065 look like a DTB header after a reboot if no actual DTB is appended
2066 to zImage. Do not leave this option active in a production kernel
2067 if you don't intend to always append a DTB. Proper passing of the
2068 location into r2 of a bootloader provided DTB is always preferable
2071 config ARM_ATAG_DTB_COMPAT
2072 bool "Supplement the appended DTB with traditional ATAG information"
2073 depends on ARM_APPENDED_DTB
2075 Some old bootloaders can't be updated to a DTB capable one, yet
2076 they provide ATAGs with memory configuration, the ramdisk address,
2077 the kernel cmdline string, etc. Such information is dynamically
2078 provided by the bootloader and can't always be stored in a static
2079 DTB. To allow a device tree enabled kernel to be used with such
2080 bootloaders, this option allows zImage to extract the information
2081 from the ATAG list and store it at run time into the appended DTB.
2084 prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
2085 default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
2087 config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
2088 bool "Use bootloader kernel arguments if available"
2090 Uses the command-line options passed by the boot loader instead of
2091 the device tree bootargs property. If the boot loader doesn't provide
2092 any, the device tree bootargs property will be used.
2094 config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
2095 bool "Extend with bootloader kernel arguments"
2097 The command-line arguments provided by the boot loader will be
2098 appended to the the device tree bootargs property.
2103 string "Default kernel command string"
2106 On some architectures (EBSA110 and CATS), there is currently no way
2107 for the boot loader to pass arguments to the kernel. For these
2108 architectures, you should supply some command-line options at build
2109 time by entering them here. As a minimum, you should specify the
2110 memory size and the root device (e.g., mem=64M root=/dev/nfs).
2113 prompt "Kernel command line type" if CMDLINE != ""
2114 default CMDLINE_FROM_BOOTLOADER
2117 config CMDLINE_FROM_BOOTLOADER
2118 bool "Use bootloader kernel arguments if available"
2120 Uses the command-line options passed by the boot loader. If
2121 the boot loader doesn't provide any, the default kernel command
2122 string provided in CMDLINE will be used.
2124 config CMDLINE_EXTEND
2125 bool "Extend bootloader kernel arguments"
2127 The command-line arguments provided by the boot loader will be
2128 appended to the default kernel command string.
2130 config CMDLINE_FORCE
2131 bool "Always use the default kernel command string"
2133 Always use the default kernel command string, even if the boot
2134 loader passes other arguments to the kernel.
2135 This is useful if you cannot or don't want to change the
2136 command-line options your boot loader passes to the kernel.
2140 bool "Kernel Execute-In-Place from ROM"
2141 depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
2143 Execute-In-Place allows the kernel to run from non-volatile storage
2144 directly addressable by the CPU, such as NOR flash. This saves RAM
2145 space since the text section of the kernel is not loaded from flash
2146 to RAM. Read-write sections, such as the data section and stack,
2147 are still copied to RAM. The XIP kernel is not compressed since
2148 it has to run directly from flash, so it will take more space to
2149 store it. The flash address used to link the kernel object files,
2150 and for storing it, is configuration dependent. Therefore, if you
2151 say Y here, you must know the proper physical address where to
2152 store the kernel image depending on your own flash memory usage.
2154 Also note that the make target becomes "make xipImage" rather than
2155 "make zImage" or "make Image". The final kernel binary to put in
2156 ROM memory will be arch/arm/boot/xipImage.
2160 config XIP_PHYS_ADDR
2161 hex "XIP Kernel Physical Location"
2162 depends on XIP_KERNEL
2163 default "0x00080000"
2165 This is the physical address in your flash memory the kernel will
2166 be linked for and stored to. This address is dependent on your
2170 bool "Kexec system call (EXPERIMENTAL)"
2171 depends on (!SMP || PM_SLEEP_SMP)
2173 kexec is a system call that implements the ability to shutdown your
2174 current kernel, and to start another kernel. It is like a reboot
2175 but it is independent of the system firmware. And like a reboot
2176 you can start any kernel with it, not just Linux.
2178 It is an ongoing process to be certain the hardware in a machine
2179 is properly shutdown, so do not be surprised if this code does not
2180 initially work for you. It may help to enable device hotplugging
2184 bool "Export atags in procfs"
2185 depends on ATAGS && KEXEC
2188 Should the atags used to boot the kernel be exported in an "atags"
2189 file in procfs. Useful with kexec.
2192 bool "Build kdump crash kernel (EXPERIMENTAL)"
2194 Generate crash dump after being started by kexec. This should
2195 be normally only set in special crash dump kernels which are
2196 loaded in the main kernel with kexec-tools into a specially
2197 reserved region and then later executed after a crash by
2198 kdump/kexec. The crash dump kernel must be compiled to a
2199 memory address not used by the main kernel
2201 For more details see Documentation/kdump/kdump.txt
2203 config AUTO_ZRELADDR
2204 bool "Auto calculation of the decompressed kernel image address"
2205 depends on !ZBOOT_ROM && !ARCH_U300
2207 ZRELADDR is the physical address where the decompressed kernel
2208 image will be placed. If AUTO_ZRELADDR is selected, the address
2209 will be determined at run-time by masking the current IP with
2210 0xf8000000. This assumes the zImage being placed in the first 128MB
2211 from start of memory.
2215 menu "CPU Power Management"
2218 source "drivers/cpufreq/Kconfig"
2223 Internal configuration node for common cpufreq on Samsung SoC
2225 config CPU_FREQ_S3C24XX
2226 bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
2227 depends on ARCH_S3C24XX && CPU_FREQ
2230 This enables the CPUfreq driver for the Samsung S3C24XX family
2233 For details, take a look at <file:Documentation/cpu-freq>.
2237 config CPU_FREQ_S3C24XX_PLL
2238 bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
2239 depends on CPU_FREQ_S3C24XX
2241 Compile in support for changing the PLL frequency from the
2242 S3C24XX series CPUfreq driver. The PLL takes time to settle
2243 after a frequency change, so by default it is not enabled.
2245 This also means that the PLL tables for the selected CPU(s) will
2246 be built which may increase the size of the kernel image.
2248 config CPU_FREQ_S3C24XX_DEBUG
2249 bool "Debug CPUfreq Samsung driver core"
2250 depends on CPU_FREQ_S3C24XX
2252 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
2254 config CPU_FREQ_S3C24XX_IODEBUG
2255 bool "Debug CPUfreq Samsung driver IO timing"
2256 depends on CPU_FREQ_S3C24XX
2258 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
2260 config CPU_FREQ_S3C24XX_DEBUGFS
2261 bool "Export debugfs for CPUFreq"
2262 depends on CPU_FREQ_S3C24XX && DEBUG_FS
2264 Export status information via debugfs.
2268 source "drivers/cpuidle/Kconfig"
2272 menu "Floating point emulation"
2274 comment "At least one emulation must be selected"
2277 bool "NWFPE math emulation"
2278 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
2280 Say Y to include the NWFPE floating point emulator in the kernel.
2281 This is necessary to run most binaries. Linux does not currently
2282 support floating point hardware so you need to say Y here even if
2283 your machine has an FPA or floating point co-processor podule.
2285 You may say N here if you are going to load the Acorn FPEmulator
2286 early in the bootup.
2289 bool "Support extended precision"
2290 depends on FPE_NWFPE
2292 Say Y to include 80-bit support in the kernel floating-point
2293 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2294 Note that gcc does not generate 80-bit operations by default,
2295 so in most cases this option only enlarges the size of the
2296 floating point emulator without any good reason.
2298 You almost surely want to say N here.
2301 bool "FastFPE math emulation (EXPERIMENTAL)"
2302 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
2304 Say Y here to include the FAST floating point emulator in the kernel.
2305 This is an experimental much faster emulator which now also has full
2306 precision for the mantissa. It does not support any exceptions.
2307 It is very simple, and approximately 3-6 times faster than NWFPE.
2309 It should be sufficient for most programs. It may be not suitable
2310 for scientific calculations, but you have to check this for yourself.
2311 If you do not feel you need a faster FP emulation you should better
2315 bool "VFP-format floating point maths"
2316 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2318 Say Y to include VFP support code in the kernel. This is needed
2319 if your hardware includes a VFP unit.
2321 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2322 release notes and additional status information.
2324 Say N if your target does not have VFP hardware.
2332 bool "Advanced SIMD (NEON) Extension support"
2333 depends on VFPv3 && CPU_V7
2335 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2340 menu "Userspace binary formats"
2342 source "fs/Kconfig.binfmt"
2345 tristate "RISC OS personality"
2348 Say Y here to include the kernel code necessary if you want to run
2349 Acorn RISC OS/Arthur binaries under Linux. This code is still very
2350 experimental; if this sounds frightening, say N and sleep in peace.
2351 You can also say M here to compile this support as a module (which
2352 will be called arthur).
2356 menu "Power management options"
2358 source "kernel/power/Kconfig"
2360 config ARCH_SUSPEND_POSSIBLE
2361 depends on !ARCH_S5PC100
2362 depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2363 CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
2366 config ARM_CPU_SUSPEND
2371 source "net/Kconfig"
2373 source "drivers/Kconfig"
2377 source "arch/arm/Kconfig.debug"
2379 source "security/Kconfig"
2381 source "crypto/Kconfig"
2383 source "lib/Kconfig"
2385 source "arch/arm/kvm/Kconfig"