Changes in Kconfig

96942092d5e67c71af246fa3bc1422cdf80a5dc9 - vdso/treewide: Drop GENERIC_TIME_VSYSCALL

Tue, 19 May 2026 08:26:17 +0200

vdso/treewide: Drop GENERIC_TIME_VSYSCALLThis Kconfig symbol is not used anymore, remove it.Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://patch.msgid.link/20260519-vdso-generic_time_vsyscal-v1-3-5c2a5905d5f5@linutronix.de List of files: /linux/arch/arm/mm/Kconfig

7b338f6d4e3d6baa057e3505592a86f6410d68ed - vdso: Drop Kconfig GENERIC_VDSO_DATA_STORE

Tue, 26 Aug 2025 08:17:12 +0200

vdso: Drop Kconfig GENERIC_VDSO_DATA_STOREAll users of the generic vDSO library also use the generic vDSO datastore.Remove the now unnecessary Kconfig symbol.Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Acked-by: Catalin Marinas Link: https://lore.kernel.org/all/20250826-vdso-cleanups-v1-9-d9b65750e49f@linutronix.de List of files: /linux/arch/arm/mm/Kconfig

278f1c933c3fab6f249b995a1a13608246b76181 - vdso: Drop kconfig GENERIC_VDSO_32

Tue, 26 Aug 2025 08:17:10 +0200

vdso: Drop kconfig GENERIC_VDSO_32This configuration is never used.Remove it.Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250826-vdso-cleanups-v1-7-d9b65750e49f@linutronix.de List of files: /linux/arch/arm/mm/Kconfig

31e9fa2ba9ad64ef09eb4a8326e5cc8af3f6fa1d - arm: vdso: Switch to generic storage implementation

Tue, 04 Feb 2025 13:05:43 +0100

arm: vdso: Switch to generic storage implementationThe generic storage implementation provides the same features as thecustom one. However it can be shared between architectures, makingmaintenance easier.Co-developed-by: Nam Cao Signed-off-by: Nam Cao Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250204-vdso-store-rng-v3-11-13a4669dfc8c@linutronix.de List of files: /linux/arch/arm/mm/Kconfig

2560cffd2134c2e070dee369b37f6e55438087f9 - ARM: Delete ARM11MPCore (ARM11 ARMv6K SMP) support

Thu, 07 Dec 2023 14:33:35 +0100

ARM: Delete ARM11MPCore (ARM11 ARMv6K SMP) supportThis ARM11 SMP configuration was one of the first SMP configurationsthe ARM kernel supported, but it has the downside of odd DMA handling,odd cache tagging, and often (as of recent) completely broken cachehandling on the ARM RealView PB11MPCore test chips. To boot theplatform it was necessary to completely disable the cache.When it comes to the EB 11MPCore it is unclear if this ever worked.These reference designs are now the only ARMv6K SMP platforms.As only reference designs of purely academic interest remain, andsince the special-cased DMA and PMU code is hard to maintain anddoesn't really work, it is not really worth our time.Delete the ARM11MPCore support along with:- The special DMA quirk CONFIG_DMA_CACHE_RWFO that is only used on ARMv6K SMP, and we are the last ARMV6K system leaving the building and the cache handling is awkward, so good-bye.- The special PMU handling that was only used by ARM11MPCore.The following is left behind:- TIMER_OF_DECLARE(arm_twd_11mp, "arm,arm11mp-twd-timer", ...) in arch/arm/kernel/smp_twd.c, this is still in use by Marvell MMP3 arch/arm/boot/dts/marvell/mmp3.dtsi- IRQCHIP_DECLARE(arm11mp_gic, "arm,arm11mp-gic", ...) in drivers/irqchip/irq-gic.c, this is still in use by Marvell MMP3 arch/arm/boot/dts/marvell/mmp3.dtsi- A compatible for the arm11mpcore SCU, since this was mistakedly used for the Cortex-A9 version of RealView EB.These are unfortunate but will need to be kept around forcompatibility. New Marvell-specific compatibles should however probablybe added.Acked-by: Mark Rutland Reviewed-by: Arnd Bergmann Signed-off-by: Linus Walleij Acked-by: Liviu Dudau Link: https://lore.kernel.org/r/20231207-drop-11mpcore-v2-1-560b396f3bf5@linaro.orgSigned-off-by: Arnd Bergmann List of files: /linux/arch/arm/mm/Kconfig

e318b36ed37d241eb279382bde587eabf1892e34 - arm: update in-source documentation references

Thu, 04 May 2023 00:50:54 +0200

arm: update in-source documentation referencesThe Arm documentation has moved to Documentation/arch/arm; updatereferences within arch/arm to match.Cc: Russell King Cc: Alim Akhtar Cc: Patrice Chotard Cc: linux-doc@vger.kernel.orgCc: linux-arm-kernel@lists.infradead.orgCc: linux-arch@vger.kernel.orgSigned-off-by: Jonathan Corbet List of files: /linux/arch/arm/mm/Kconfig

252309adc81f529d42c8c90a4965866ec82cb6ad - ARM: Make CONFIG_CPU_V7 valid for 32bit ARMv8 implementations

Fri, 17 Mar 2023 20:50:25 +0100

ARM: Make CONFIG_CPU_V7 valid for 32bit ARMv8 implementationsARMv8 is a superset of ARMv7, and all the ARMv8 features arediscoverable with a set of ID registers. It means that we canuse CPU_V7 to guard ARMv8 features at compile time.This commit simply amends the CPU_V7 configuration symbol commentto reflect that CPU_V7 also covers ARMv8.Signed-off-by: Marc Zyngier Signed-off-by: Zaid Al-Bassam Tested-by: Florian Fainelli Link: https://lore.kernel.org/r/20230317195027.3746949-7-zalbassam@google.comSigned-off-by: Will Deacon List of files: /linux/arch/arm/mm/Kconfig

cfb1076d1549f6d500da65a4593a67cba19cb041 - ARM: 9288/1: Kconfigs: fix spelling & grammar

Tue, 24 Jan 2023 19:16:18 +0100

ARM: 9288/1: Kconfigs: fix spelling & grammarFix spelling (reported by codespell) and grammar in Arm Kconfig files.Signed-off-by: Randy Dunlap Cc: linux-arm-kernel@lists.infradead.orgCc: patches@armlinux.org.ukSigned-off-by: Russell King (Oracle) List of files: /linux/arch/arm/mm/Kconfig

2bf6204240fddb22cc4940b9e3f40c538390212e - ARM: 9212/1: domain: Modify Kconfig help text

Sun, 19 Jun 2022 21:40:16 +0200

ARM: 9212/1: domain: Modify Kconfig help textAfter the removal of set_fs() the reference to set_fs() is stale.Alter the helptext to reflect what the config option really does.Fixes: 8ac6f5d7f84b ("ARM: 9113/1: uaccess: remove set_fs() implementation")Acked-by: Arnd Bergmann Signed-off-by: Linus Walleij Signed-off-by: Russell King (Oracle) List of files: /linux/arch/arm/mm/Kconfig

5d6f52671e76ca2d55d74e676ac4c38ceb14a2d3 - ARM: rework endianess selection

Mon, 04 Apr 2022 11:52:31 +0200

ARM: rework endianess selectionChoosing big-endian vs little-endian kernels in Kconfig has not workedcorrectly since the introduction of CONFIG_ARCH_MULTIPLATFORM a longtime ago.The problems is that CONFIG_BIG_ENDIAN depends onARCH_SUPPORTS_BIG_ENDIAN, which can set by any one platformin the config, but would actually have to be supported by allof them.This was mostly ok for ARMv6/ARMv7 builds, since these are BE8 andtend to just work aside from problems in nonportable device drivers.For ARMv4/v5 machines, CONFIG_BIG_ENDIAN and CONFIG_ARCH_MULTIPLATFORMwere never set together, so this was disabled on all those machinesexcept for IXP4xx.As IXP4xx can now become part of ARCH_MULTIPLATFORM, it seems better toformalize this logic: all ARMv4/v5 platforms get an explicit dependencyon being either big-endian (ixp4xx) or little-endian (the rest). We maywant to fix ixp4xx in the future to support both, but it does not workin LE mode at the moment.For the ARMv6/v7 platforms, there are two ways this could be handled a) allow both modes only for platforms selecting 'ARCH_SUPPORTS_BIG_ENDIAN' today, but only LE mode for the others, given that these were added intentionally at some point. b) allow both modes everwhere, given that it was already possible to build that way by e.g. selecting ARCH_VIRT, and that the list is not an accurate reflection of which platforms may or may not work.Out of these, I picked b) because it seemed slighly more logicalto me.Signed-off-by: Arnd Bergmann List of files: /linux/arch/arm/mm/Kconfig

9c0e6a89b592f4c4e4d769dbc22d399ab0685159 - Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Thu, 24 Mar 2022 01:35:57 +0100

Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-armPull ARM updates from Russell King: "Updates for IRQ stacks and virtually mapped stack support, and ftrace: - Support for IRQ and vmap'ed stacks This covers all the work related to implementing IRQ stacks and vmap'ed stacks for all 32-bit ARM systems that are currently supported by the Linux kernel, including RiscPC and Footbridge. It has been submitted for review in four different waves: - IRQ stacks support for v7 SMP systems [0] - vmap'ed stacks support for v7 SMP systems[1] - extending support for both IRQ stacks and vmap'ed stacks for all remaining configurations, including v6/v7 SMP multiplatform kernels and uniprocessor configurations including v7-M [2] - fixes and updates in [3] - ftrace fixes and cleanups Make all flavors of ftrace available on all builds, regardless of ISA choice, unwinder choice or compiler [4]: - use ADD not POP where possible - fix a couple of Thumb2 related issues - enable HAVE_FUNCTION_GRAPH_FP_TEST for robustness - enable the graph tracer with the EABI unwinder - avoid clobbering frame pointer registers to make Clang happy - Fixes for the above"[0] https://lore.kernel.org/linux-arm-kernel/20211115084732.3704393-1-ardb@kernel.org/[1] https://lore.kernel.org/linux-arm-kernel/20211122092816.2865873-1-ardb@kernel.org/[2] https://lore.kernel.org/linux-arm-kernel/20211206164659.1495084-1-ardb@kernel.org/[3] https://lore.kernel.org/linux-arm-kernel/20220124174744.1054712-1-ardb@kernel.org/[4] https://lore.kernel.org/linux-arm-kernel/20220203082204.1176734-1-ardb@kernel.org/* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (62 commits) ARM: fix building NOMMU ARMv4/v5 kernels ARM: unwind: only permit stack switch when unwinding call_with_stack() ARM: Revert "unwind: dump exception stack from calling frame" ARM: entry: fix unwinder problems caused by IRQ stacks ARM: unwind: set frame.pc correctly for current-thread unwinding ARM: 9184/1: return_address: disable again for CONFIG_ARM_UNWIND=y ARM: 9183/1: unwind: avoid spurious warnings on bogus code addresses Revert "ARM: 9144/1: forbid ftrace with clang and thumb2_kernel" ARM: mach-bcm: disable ftrace in SMC invocation routines ARM: cacheflush: avoid clobbering the frame pointer ARM: kprobes: treat R7 as the frame pointer register in Thumb2 builds ARM: ftrace: enable the graph tracer with the EABI unwinder ARM: unwind: track location of LR value in stack frame ARM: ftrace: enable HAVE_FUNCTION_GRAPH_FP_TEST ARM: ftrace: avoid unnecessary literal loads ARM: ftrace: avoid redundant loads or clobbering IP ARM: ftrace: use trampolines to keep .init.text in branching range ARM: ftrace: use ADD not POP to counter PUSH at entry ARM: ftrace: ensure that ADR takes the Thumb bit into account ARM: make get_current() and __my_cpu_offset() __always_inline ... List of files: /linux/arch/arm/mm/Kconfig

b9baf5c8c5c356757f4f9d8180b5e9d234065bc3 - ARM: Spectre-BHB workaround

Thu, 10 Feb 2022 17:05:45 +0100

ARM: Spectre-BHB workaroundWorkaround the Spectre BHB issues for Cortex-A15, Cortex-A57,Cortex-A72, Cortex-A73 and Cortex-A75. We also include Brahma B15 aswell to be safe, which is affected by Spectre V2 in the same ways asCortex-A15.Reviewed-by: Catalin Marinas Signed-off-by: Russell King (Oracle) List of files: /linux/arch/arm/mm/Kconfig

9dd78194a3722fa6712192cdd4f7032d45112a9a - ARM: report Spectre v2 status through sysfs

Fri, 11 Feb 2022 17:45:54 +0100

ARM: report Spectre v2 status through sysfsAs per other architectures, add support for reporting the Spectrevulnerability status via sysfs CPU.Acked-by: Catalin Marinas Signed-off-by: Russell King (Oracle) List of files: /linux/arch/arm/mm/Kconfig

7b9896c352073156a325c3bb0dc4c46e06e2a468 - ARM: percpu: add SMP_ON_UP support

Thu, 25 Nov 2021 10:26:44 +0100

ARM: percpu: add SMP_ON_UP supportPermit the use of the TPIDRPRW system register for carrying the per-CPUoffset in generic SMP configurations that also target non-SMP capableARMv6 cores. This uses the SMP_ON_UP code patching framework to turn allTPIDRPRW accesses into reads/writes of entry #0 in the __per_cpu_offsetarray.While at it, switch over some existing direct TPIDRPRW accesses in asmcode to invocations of a new helper that is patched in the same way whennecessary.Note that CPU_V6+SMP without SMP_ON_UP results in a kernel that does notboot on v6 CPUs without SMP extensions, so add this dependency toKconfig as well.Acked-by: Linus Walleij Acked-by: Nicolas Pitre Signed-off-by: Ard Biesheuvel Tested-by: Marc Zyngier Tested-by: Vladimir Murzin # ARMv7M List of files: /linux/arch/arm/mm/Kconfig

8b5bd5adf9e6d073e538e2e9de810f2f25379c3b - ARM: 9137/1: disallow CONFIG_THUMB with ARMv4

Mon, 18 Oct 2021 16:30:07 +0200

ARM: 9137/1: disallow CONFIG_THUMB with ARMv4We can currently build a multi-cpu enabled kernel that allows both ARMv4and ARMv5 CPUs, and also supports THUMB mode in user space.However, returning to user space in this configuration with the usr_retmacro requires the use of the 'bx' instruction, which is refused bythe assembler:arch/arm/kernel/entry-armv.S: Assembler messages:arch/arm/kernel/entry-armv.S:937: Error: selected processor does not support `bx lr' in ARM modearch/arm/kernel/entry-armv.S:960: Error: selected processor does not support `bx lr' in ARM modearch/arm/kernel/entry-armv.S:1003: Error: selected processor does not support `bx lr' in ARM mode:2:2: note: instruction requires: armv4t bx lrWhile it would be possible to handle this correctly in principle, doing soseems to not be worth it, if we can simply avoid the problem by enforcingthat a kernel supporting both ARMv4 and a later CPU architecture cannotrun THUMB binaries.This turned up while build-testing with clang; for some reason,gcc never triggered the problem.Reviewed-by: Nick Desaulniers Reviewed-by: Ard Biesheuvel Signed-off-by: Arnd Bergmann Signed-off-by: Russell King (Oracle) List of files: /linux/arch/arm/mm/Kconfig

345dac33f58894a56d17b92a41be10e16585ceff - ARM: 9136/1: ARMv7-M uses BE-8, not BE-32

Mon, 18 Oct 2021 16:30:06 +0200

ARM: 9136/1: ARMv7-M uses BE-8, not BE-32When configuring the kernel for big-endian, we set either BE-8 or BE-32based on the CPU architecture level. Until linux-4.4, we did not haveany ARMv7-M platform allowing big-endian builds, but now i.MX/Vybridis in that category, adn we get a build error because of this:arch/arm/kernel/module-plts.c: In function 'get_module_plt':arch/arm/kernel/module-plts.c:60:46: error: implicit declaration of function '__opcode_to_mem_thumb32' [-Werror=implicit-function-declaration]This comes down to picking the wrong default, ARMv7-M uses BE8like ARMv7-A does. Changing the default gets the kernel to compileand presumably works.https://lore.kernel.org/all/1455804123-2526139-2-git-send-email-arnd@arndb.de/Tested-by: Vladimir Murzin Signed-off-by: Arnd Bergmann Signed-off-by: Russell King (Oracle) List of files: /linux/arch/arm/mm/Kconfig

89a0b011fa7258e44b5e720c4057f47c84c1d0c6 - ARM: 9091/1: Revert "mm: qsd8x50: Fix incorrect permission faults"

Thu, 03 Jun 2021 14:27:35 +0200

ARM: 9091/1: Revert "mm: qsd8x50: Fix incorrect permission faults"This reverts commit e220ba60223a9d63e70217e5b112160df8c21cea.The VERIFY_PERMISSION_FAULT is introduced since 2009 but noone use it, just revert it and clean unused comment.Signed-off-by: Kefeng Wang Signed-off-by: Russell King List of files: /linux/arch/arm/mm/Kconfig

cc6111375cec44890218e5be654884f8b7bfc566 - ARM: drop efm32 platform

Fri, 15 Jan 2021 16:51:24 +0100

ARM: drop efm32 platformI didn't touch this code since it served as a platform to introduceARMv7-M support to Linux. The only known machine that runs Linux has only4 MiB of RAM (that originally only exists to hold the display's framebuffer).There are no known users and no further use foreseeable, so drop thecode.Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20210115155130.185010-2-u.kleine-koenig@pengutronix.de'Signed-off-by: Arnd Bergmann List of files: /linux/arch/arm/mm/Kconfig

28187dc8ebd938d574edfc6d9e0f9c51c21ff3f4 - ARM: 9025/1: Kconfig: CPU_BIG_ENDIAN depends on !LD_IS_LLD

Tue, 17 Nov 2020 00:46:39 +0100

ARM: 9025/1: Kconfig: CPU_BIG_ENDIAN depends on !LD_IS_LLDLLD does not yet support any big endian architectures. Make this confignon-selectable when using LLD until LLD is fixed.Link: https://github.com/ClangBuiltLinux/linux/issues/965Signed-off-by: Nick Desaulniers Tested-by: Nathan Chancellor Reviewed-by: Nathan Chancellor Reported-by: kbuild test robot Signed-off-by: Russell King List of files: /linux/arch/arm/mm/Kconfig

38206c24ab09b4f4c2a57de5c1af0bb2e69cf5b6 - Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Thu, 05 Dec 2019 20:38:40 +0100

Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/socPull ARM SoC platform updates from Olof Johansson: "Most of these are for MMP (seeing a bunch of cleanups and refactorings for the first time in a while), and for OMAP (a bunch of cleanups and added support for voltage controller on OMAP4430)"* tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (51 commits) ARM: OMAP2+: Add missing put_device() call in omapdss_init_of() OMAP2: fixup doc comments in omap_device ARM: OMAP1: drop duplicated dependency on ARCH_OMAP1 ARM: ASPEED: update default ARCH_NR_GPIO for ARCH_ASPEED ARM: imx: use generic function to exit coherency ARM: tegra: Use WFE for power-gating on Tegra30 ARM: tegra: Fix FLOW_CTLR_HALT register clobbering by tegra_resume() ARM: exynos: Enable exynos-asv driver for ARCH_EXYNOS ARM: s3c: Rename s5p_usb_phy functions ARM: s3c: Rename s3c64xx_spi_setname() function ARM: imx: Add serial number support for i.MX6/7 SoCs ARM: imx: Drop imx_anatop_usb_chrg_detect_disable() arm64: Introduce config for S32 ARM: hisi: drop useless depend on ARCH_MULTI_V7 arm64: realtek: Select reset controller ARM: shmobile: rcar-gen2: Drop legacy DT clock support ARM: OMAP2+: Remove duplicated include from pmic-cpcap.c ARM: OMAP1: ams-delta FIQ: Fix a typo ("Initiaize") MAINTAINERS: Add logicpd-som-lv and logicpd-torpedo to OMAP TREE ARM: OMAP2+: pdata-quirks: drop TI_ST/KIM support ... List of files: /linux/arch/arm/mm/Kconfig