Changes in Kconfig

cf124696 - csky/vdso: Remove gettimeofday() and friends from VDSO

Thu, 10 Oct 2024 07:01:03 +0000

csky/vdso: Remove gettimeofday() and friends from VDSOThe time-related VDSO functionality was introduced in 2021 incommit 87f3248cdb9a ("csky: Reconstruct VDSO framework") andcommit 0d3b051adbb7 ("csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSO").However the corresponding aux-vector entry AT_SYSINFO_EHDR was neverwired up, making these functions impossible to test or use.The VDSO itself is kept as it also provides rt_sigreturn which isexposed differently to userspace.Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20241010-vdso-generic-base-v1-1-b64f0842d512@linutronix.de List of files: /linux-6.15/arch/csky/Kconfig

5800e77d - csky: Emulate one-byte cmpxchg

Wed, 27 Mar 2024 22:14:26 +0000

csky: Emulate one-byte cmpxchgUse the new cmpxchg_emu_u8() to emulate one-byte cmpxchg() on csky.[ paulmck: Apply kernel test robot feedback. ][ paulmck: Drop two-byte support per Arnd Bergmann feedback. ]Co-developed-by: Yujie Liu Signed-off-by: Yujie Liu Signed-off-by: Paul E. McKenney Tested-by: Yujie Liu Reviewed-by: Guo Ren Cc: Arnd Bergmann Cc: List of files: /linux-6.15/arch/csky/Kconfig

5394f1e9 - arch: define CONFIG_PAGE_SIZE_*KB on all architectures

Mon, 26 Feb 2024 16:14:13 +0000

arch: define CONFIG_PAGE_SIZE_*KB on all architecturesMost architectures only support a single hardcoded page size. In orderto ensure that each one of these sets the corresponding Kconfig symbols,change over the PAGE_SHIFT definition to the common one and allowonly the hardware page size to be selected.Acked-by: Guo Ren Acked-by: Heiko Carstens Acked-by: Stafford Horne Acked-by: Johannes Berg Acked-by: Geert Uytterhoeven Reviewed-by: Thomas Gleixner Signed-off-by: Arnd Bergmann List of files: /linux-6.15/arch/csky/Kconfig

8690bbcf - Introduce cpu_dcache_is_aliasing() across all architectures

Thu, 15 Feb 2024 14:46:32 +0000

Introduce cpu_dcache_is_aliasing() across all architecturesIntroduce a generic way to query whether the data cache is virtuallyaliased on all architectures. Its purpose is to ensure that subsystemswhich are incompatible with virtually aliased data caches (e.g. FS_DAX)can reliably query this.For data cache aliasing, there are three scenarios dependending on thearchitecture. Here is a breakdown based on my understanding:A) The data cache is always aliasing:* arc* csky* m68k (note: shared memory mappings are incoherent ? SHMLBA is missing there.)* sh* pariscB) The data cache aliasing is statically known or depends on querying CPU state at runtime:* arm (cache_is_vivt() || cache_is_vipt_aliasing())* mips (cpu_has_dc_aliases)* nios2 (NIOS2_DCACHE_SIZE > PAGE_SIZE)* sparc32 (vac_cache_size > PAGE_SIZE)* sparc64 (L1DCACHE_SIZE > PAGE_SIZE)* xtensa (DCACHE_WAY_SIZE > PAGE_SIZE)C) The data cache is never aliasing:* alpha* arm64 (aarch64)* hexagon* loongarch (but with incoherent write buffers, which are disabled since commit d23b7795 ("LoongArch: Change SHMLBA from SZ_64K to PAGE_SIZE"))* microblaze* openrisc* powerpc* riscv* s390* um* x86Require architectures in A) and B) to select ARCH_HAS_CPU_CACHE_ALIASING andimplement "cpu_dcache_is_aliasing()".Architectures in C) don't select ARCH_HAS_CPU_CACHE_ALIASING, and thuscpu_dcache_is_aliasing() simply evaluates to "false".Note that this leaves "cpu_icache_is_aliasing()" to be implemented as futurework. This would be useful to gate features like XIP on architectureswhich have aliasing CPU dcache-icache but not CPU dcache-dcache.Use "cpu_dcache" and "cpu_cache" rather than just "dcache" and "cache"to clarify that we really mean "CPU data cache" and "CPU cache" toeliminate any possible confusion with VFS "dentry cache" and "pagecache".Link: https://lore.kernel.org/lkml/20030910210416.GA24258@mail.jlokier.co.uk/Link: https://lkml.kernel.org/r/20240215144633.96437-9-mathieu.desnoyers@efficios.comFixes: d92576f1167c ("dax: does not work correctly with virtual aliasing caches")Signed-off-by: Mathieu Desnoyers Cc: Dan Williams Cc: Vishal Verma Cc: Dave Jiang Cc: Matthew Wilcox Cc: Arnd Bergmann Cc: Russell King Cc: Alasdair Kergon Cc: Christoph Hellwig Cc: Dave Chinner Cc: Heiko Carstens Cc: kernel test robot Cc: Michael Sclafani Cc: Mike Snitzer Cc: Mikulas Patocka Signed-off-by: Andrew Morton List of files: /linux-6.15/arch/csky/Kconfig

a050ba1e - mm/fault: convert remaining simple cases to lock_mm_and_find_vma()

Sat, 24 Jun 2023 17:55:38 +0000

mm/fault: convert remaining simple cases to lock_mm_and_find_vma()This does the simple pattern conversion of alpha, arc, csky, hexagon,loongarch, nios2, sh, sparc32, and xtensa to the lock_mm_and_find_vma()helper. They all have the regular fault handling pattern without oddspecial cases.The remaining architectures all have something that keeps us from astraightforward conversion: ia64 and parisc have stacks that can growboth up as well as down (and ia64 has special address region checks).And m68k, microblaze, openrisc, sparc64, and um end up having extrarules about only expanding the stack down a limited amount below theuser space stack pointer. That is something that x86 used to do too(long long ago), and it probably could just be skipped, but it stillmakes the conversion less than trivial.Note that this conversion was done manually and with the exception ofalpha without any build testing, because I have a fairly limited cross-building environment. The cases are all simple, and I went through thechanges several times, but...Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/csky/Kconfig

7202e979 - csky/smp: Switch to hotplug core state synchronization

Fri, 12 May 2023 21:07:35 +0000

csky/smp: Switch to hotplug core state synchronizationSwitch to the CPU hotplug core state tracking and synchronizationmechanim. No functional change intended.Signed-off-by: Thomas Gleixner Signed-off-by: Peter Zijlstra (Intel) Tested-by: Michael Kelley Tested-by: Oleksandr Natalenko Tested-by: Helge Deller # pariscTested-by: Guilherme G. Piccoli # Steam DeckLink: https://lore.kernel.org/r/20230512205256.747254502@linutronix.de List of files: /linux-6.15/arch/csky/Kconfig

4e7c8655 - csky: drop ARCH_FORCE_MAX_ORDER

Fri, 24 Mar 2023 05:22:23 +0000

csky: drop ARCH_FORCE_MAX_ORDERThe default value of ARCH_FORCE_MAX_ORDER matches the generic defaultdefined in the MM code, the architecture does not support huge pages, sothere is no need to keep ARCH_FORCE_MAX_ORDER option available.Drop it.Link: https://lkml.kernel.org/r/20230324052233.2654090-5-rppt@kernel.orgSigned-off-by: Mike Rapoport (IBM) Acked-by: Kirill A. Shutemov Reviewed-by: Zi Yan Cc: Arnd Bergmann Cc: Catalin Marinas Cc: Christophe Leroy Cc: David Miller Cc: Dinh Nguyen Cc: Geert Uytterhoeven Cc: Guo Ren Cc: John Paul Adrian Glaubitz Cc: Max Filippov Cc: Michael Ellerman Cc: Rich Felker Cc: "Russell King (Oracle)" Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton List of files: /linux-6.15/arch/csky/Kconfig

74c53b57 - csky: remove obsolete config CPU_TLB_SIZE

Thu, 30 Mar 2023 11:07:10 +0000

csky: remove obsolete config CPU_TLB_SIZECommit 9d35dc3006a9 ("csky: Revert mmu ASID mechanism") removes the onlyuse of CONFIG_CPU_TLB_SIZE. Since then, this config has no effect and canbe deleted.Remove the obsolete config CPU_TLB_SIZE.Signed-off-by: Lukas Bulwahn Signed-off-by: Guo Ren List of files: /linux-6.15/arch/csky/Kconfig

23baf831 - mm, treewide: redefine MAX_ORDER sanely

Wed, 15 Mar 2023 11:31:33 +0000

mm, treewide: redefine MAX_ORDER sanelyMAX_ORDER currently defined as number of orders page allocator supports:user can ask buddy allocator for page order between 0 and MAX_ORDER-1.This definition is counter-intuitive and lead to number of bugs all overthe kernel.Change the definition of MAX_ORDER to be inclusive: the range of ordersuser can ask from buddy allocator is 0..MAX_ORDER now.[kirill@shutemov.name: fix min() warning] Link: https://lkml.kernel.org/r/20230315153800.32wib3n5rickolvh@box[akpm@linux-foundation.org: fix another min_t warning][kirill@shutemov.name: fixups per Zi Yan] Link: https://lkml.kernel.org/r/20230316232144.b7ic4cif4kjiabws@box.shutemov.name[akpm@linux-foundation.org: fix underlining in docs] Link: https://lore.kernel.org/oe-kbuild-all/202303191025.VRCTk6mP-lkp@intel.com/Link: https://lkml.kernel.org/r/20230315113133.11326-11-kirill.shutemov@linux.intel.comSigned-off-by: Kirill A. Shutemov Reviewed-by: Michael Ellerman [powerpc]Cc: "Kirill A. Shutemov" Cc: Zi Yan Signed-off-by: Andrew Morton List of files: /linux-6.15/arch/csky/Kconfig

7e200490 - Revert "csky: Add support for restartable sequence"

Fri, 23 Jul 2021 16:16:00 +0000

Revert "csky: Add support for restartable sequence"This reverts commit 9866d141a0977ace974400bf1f793dfc163409ce.The csky rseq support has been merged without ever notifying the rseqmaintainers, and without any of the required asssembler glue in the rseqselftests, which means it is entirely untested.It is also derived from a non-upstream riscv patch which has known bugs.The assembly part of this revert should be carefully reviewed by thearchitecture maintainer because it touches code which has changed sincethe merge of the reverted patch.The rseq selftests assembly glue should be introduced at the same timeas the architecture rseq support. Without the presence of any test, Irecommend reverting rseq support from csky for now.Link: https://lore.kernel.org/lkml/1257037909.25426.1626705790861.JavaMail.zimbra@efficios.com/Signed-off-by: Mathieu Desnoyers Signed-off-by: Guo Ren Cc: Al Viro Cc: Linus Torvalds Cc: linux-csky@vger.kernel.org List of files: /linux-6.15/arch/csky/Kconfig

ce0ba954 - csky: Kconfig: Fix spelling mistake "Meory" -> "Memory"

Fri, 07 Oct 2022 20:16:48 +0000

csky: Kconfig: Fix spelling mistake "Meory" -> "Memory"There is a spelling mistake in a Kconfig option description. Fix it.Signed-off-by: Colin Ian King Signed-off-by: Guo Ren List of files: /linux-6.15/arch/csky/Kconfig

b203c67e - csky: add arch support current_stack_pointer

Sat, 22 Oct 2022 01:43:40 +0000

csky: add arch support current_stack_pointerTo follow the existing per-arch conventions, using "current_stack_pointer"to set sp.This will let it be used in non-arch places(like HARDENED_USERCOPY).Refer to the implementation of riscv commit fdecfea09328 ("riscv: Rename"sp_in_global" to "current_stack_pointer"").Link: https://lore.kernel.org/lkml/20220224060411.1855683-1-keescook@chromium.org/Signed-off-by: Tong Tiangen Signed-off-by: Guo Ren List of files: /linux-6.15/arch/csky/Kconfig

0192445c - arch: mm: rename FORCE_MAX_ZONEORDER to ARCH_FORCE_MAX_ORDER

Mon, 15 Aug 2022 14:39:59 +0000

arch: mm: rename FORCE_MAX_ZONEORDER to ARCH_FORCE_MAX_ORDERThis Kconfig option is used by individual arch to set its desiredMAX_ORDER. Rename it to reflect its actual use.Link: https://lkml.kernel.org/r/20220815143959.1511278-1-zi.yan@sent.comAcked-by: Mike Rapoport Signed-off-by: Zi Yan Acked-by: Guo Ren [csky]Acked-by: Arnd Bergmann Acked-by: Catalin Marinas [arm64]Acked-by: Huacai Chen [LoongArch]Acked-by: Michael Ellerman [powerpc]Cc: Vineet Gupta Cc: Taichi Sugaya Cc: Neil Armstrong Cc: Qin Jian Cc: Guo Ren Cc: Geert Uytterhoeven Cc: Thomas Bogendoerfer Cc: Dinh Nguyen Cc: Christophe Leroy Cc: Yoshinori Sato Cc: "David S. Miller" Cc: Chris Zankel Cc: Ley Foon Tan Signed-off-by: Andrew Morton List of files: /linux-6.15/arch/csky/Kconfig

7f8030ce - csky: Enable ARCH_INLINE_READ/WRITE/SPIN*

Sun, 24 Jul 2022 02:52:17 +0000

csky: Enable ARCH_INLINE_READ*/WRITE*/SPIN*Enable ARCH_INLINE_READ*/WRITE*/SPIN* when !PREEMPTION, it is copiedfrom arch/arm64. It could reduce procedure calls and improvesperformance.Signed-off-by: Guo Ren Signed-off-by: Guo Ren List of files: /linux-6.15/arch/csky/Kconfig

45e15c1a - csky: Add qspinlock support

Sun, 24 Jul 2022 01:32:34 +0000

csky: Add qspinlock supportEnable qspinlock by the requirements mentioned in a8ad07e5240c9("asm-generic: qspinlock: Indicate the use of mixed-size atomics").C-SKY only has "ldex/stex" for all atomic operations. So csky give astrong forward guarantee for "ldex/stex." That means when ldex grabbedthe cache line into $L1, it would block other cores from snooping theaddress with several cycles. The atomic_fetch_add & xchg16 has the sameforward guarantee level in C-SKY.Qspinlock has better code size and performance in a fast path.Signed-off-by: Guo Ren Signed-off-by: Guo Ren List of files: /linux-6.15/arch/csky/Kconfig

4e8bb4ba - csky: Add jump-label implementation

Mon, 18 Apr 2022 13:01:54 +0000

csky: Add jump-label implementationAdd jump-label implementation for static branchSigned-off-by: Guo Ren Signed-off-by: Guo Ren List of files: /linux-6.15/arch/csky/Kconfig

3d923c5f - mm/mmap: drop ARCH_HAS_VM_GET_PAGE_PROT

Mon, 11 Jul 2022 07:06:00 +0000

mm/mmap: drop ARCH_HAS_VM_GET_PAGE_PROTNow all the platforms enable ARCH_HAS_GET_PAGE_PROT. They define andexport own vm_get_page_prot() whether custom or standardDECLARE_VM_GET_PAGE_PROT. Hence there is no need for default genericfallback for vm_get_page_prot(). Just drop this fallback and alsoARCH_HAS_GET_PAGE_PROT mechanism.Link: https://lkml.kernel.org/r/20220711070600.2378316-27-anshuman.khandual@arm.comSigned-off-by: Anshuman Khandual Reviewed-by: Geert Uytterhoeven Reviewed-by: Christoph Hellwig Reviewed-by: Christophe Leroy Acked-by: Geert Uytterhoeven Cc: Arnd Bergmann Cc: Brian Cain Cc: Catalin Marinas Cc: Christoph Hellwig Cc: Chris Zankel Cc: "David S. Miller" Cc: Dinh Nguyen Cc: Guo Ren Cc: Heiko Carstens Cc: Huacai Chen Cc: Ingo Molnar Cc: "James E.J. Bottomley" Cc: Jeff Dike Cc: Jonas Bonn Cc: Michael Ellerman Cc: Michal Simek Cc: Nicholas Piggin Cc: Palmer Dabbelt Cc: Paul Mackerras Cc: Paul Walmsley Cc: Richard Henderson Cc: Rich Felker Cc: Russell King Cc: Sam Ravnborg Cc: Stafford Horne Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Vineet Gupta Cc: WANG Xuerui Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton List of files: /linux-6.15/arch/csky/Kconfig

0d708360 - csky/mm: enable ARCH_HAS_VM_GET_PAGE_PROT

Mon, 11 Jul 2022 07:05:51 +0000

csky/mm: enable ARCH_HAS_VM_GET_PAGE_PROTThis enables ARCH_HAS_VM_GET_PAGE_PROT on the platform and exportsstandard vm_get_page_prot() implementation via DECLARE_VM_GET_PAGE_PROT,which looks up a private and static protection_map[] array. Subsequentlyall __SXXX and __PXXX macros can be dropped which are no longer needed.Link: https://lkml.kernel.org/r/20220711070600.2378316-18-anshuman.khandual@arm.comSigned-off-by: Anshuman Khandual Acked-by: Guo Ren Cc: Geert Uytterhoeven Cc: Arnd Bergmann Cc: Brian Cain Cc: Catalin Marinas Cc: Christophe Leroy Cc: Christoph Hellwig Cc: Christoph Hellwig Cc: Chris Zankel Cc: "David S. Miller" Cc: Dinh Nguyen Cc: Heiko Carstens Cc: Huacai Chen Cc: Ingo Molnar Cc: "James E.J. Bottomley" Cc: Jeff Dike Cc: Jonas Bonn Cc: Michael Ellerman Cc: Michal Simek Cc: Nicholas Piggin Cc: Palmer Dabbelt Cc: Paul Mackerras Cc: Paul Walmsley Cc: Richard Henderson Cc: Rich Felker Cc: Russell King Cc: Sam Ravnborg Cc: Stafford Horne Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Vineet Gupta Cc: WANG Xuerui Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton List of files: /linux-6.15/arch/csky/Kconfig

24a9c541 - context_tracking: Split user tracking Kconfig

Wed, 08 Jun 2022 14:40:24 +0000

context_tracking: Split user tracking KconfigContext tracking is going to be used not only to track user transitionsbut also idle/IRQs/NMIs. The user tracking part will then become aseparate feature. Prepare Kconfig for that.[ frederic: Apply Max Filippov feedback. ]Signed-off-by: Frederic Weisbecker Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Neeraj Upadhyay Cc: Uladzislau Rezki Cc: Joel Fernandes Cc: Boqun Feng Cc: Nicolas Saenz Julienne Cc: Marcelo Tosatti Cc: Xiongfeng Wang Cc: Yu Liao Cc: Phil Auld Cc: Paul GortmakerCc: Alex Belits Signed-off-by: Paul E. McKenney Reviewed-by: Nicolas Saenz Julienne Tested-by: Nicolas Saenz Julienne List of files: /linux-6.15/arch/csky/Kconfig

e4df2d5e - csky: Add C based string functions

Wed, 30 Mar 2022 12:07:14 +0000

csky: Add C based string functionsTry to access RAM with the largest bit width possible, but withoutdoing unaligned accesses.A further improvement could be to use multiple read and writes as theassembly version was trying to do.Tested on a BeagleV Starlight with a SiFive U74 core, where theimprovement is noticeable.Signed-off-by: Matteo Croce Co-developed-by: Guo Ren Signed-off-by: Guo Ren List of files: /linux-6.15/arch/csky/Kconfig