Changes in Kbuild

08a36a48 - sched/vtime: Do not include header

Wed, 10 Apr 2024 15:09:48 +0000

sched/vtime: Do not include headerThere is no architecture-specific code or data leftthat generic needs to know about.Thus, avoid the inclusion of header.Signed-off-by: Alexander Gordeev Signed-off-by: Ingo Molnar Reviewed-by: Frederic Weisbecker Acked-by: Nicholas Piggin Link: https://lore.kernel.org/r/f7cd245668b9ae61a55184871aec494ec9199c4a.1712760275.git.agordeev@linux.ibm.com List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

efa1f850 - powerpc: remove

Sun, 06 Aug 2023 15:09:54 +0000

powerpc: remove All *.S files under arch/powerpc/ have been converted to include instead of .Remove .Signed-off-by: Masahiro Yamada Signed-off-by: Michael Ellerman Link: https://msgid.link/20230806150954.394189-3-masahiroy@kernel.org List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

a13408c2 - char/agp: introduce asm-generic/agp.h

Sun, 12 Feb 2023 08:46:11 +0000

char/agp: introduce asm-generic/agp.hThere are several architectures that duplicate definitions ofmap_page_into_agp(), unmap_page_from_agp() and flush_agp_cache().Define those in asm-generic/agp.h and use it instead of duplicatedper-architecture headers.Signed-off-by: Mike Rapoport (IBM) Signed-off-by: Arnd Bergmann List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

14b3c9d2 - powerpc/syscalls: switch to generic syscalltbl.sh

Mon, 01 Mar 2021 15:30:18 +0000

powerpc/syscalls: switch to generic syscalltbl.shMany architectures duplicate similar shell scripts.This commit converts powerpc to use scripts/syscalltbl.sh. This alsounifies syscall_table_32.h and syscall_table_c32.h.Signed-off-by: Masahiro Yamada Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210301153019.362742-1-masahiroy@kernel.org List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

87dbc209 - local64.h: make mandatory

Tue, 29 Dec 2020 23:14:49 +0000

local64.h: make mandatoryMake mandatory in include/asm-generic/Kbuild andremove all arch/*/include/asm/local64.h arch-specific files since theyonly #include .This fixes build errors on arch/c6x/ and arch/nios2/ forblock/blk-iocost.c.Build-tested on 21 of 25 arch-es. (tools problems on the others)Yes, we could even rename to and change all #includes to use instead.Link: https://lkml.kernel.org/r/20201227024446.17018-1-rdunlap@infradead.orgSigned-off-by: Randy Dunlap Suggested-by: Christoph Hellwig Reviewed-by: Masahiro Yamada Cc: Jens Axboe Cc: Ley Foon Tan Cc: Mark Salter Cc: Aurelien Jacquiot Cc: Peter Zijlstra Cc: Arnd Bergmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

aa65ff6b - powerpc/64s: Implement queued spinlocks and rwlocks

Fri, 24 Jul 2020 13:14:20 +0000

powerpc/64s: Implement queued spinlocks and rwlocksThese have shown significantly improved performance and fairness whenspinlock contention is moderate to high on very large systems.With this series including subsequent patches, on a 16 socket 1536thread POWER9, a stress test such as same-file open/close from allCPUs gets big speedups, 11620op/s aggregate with simple spinlocks vs384158op/s (33x faster), where the difference in throughput betweenthe fastest and slowest thread goes from 7x to 1.4x.Thanks to the fast path being identical in terms of atomics andbarriers (after a subsequent optimisation patch), single threadedperformance is not changed (no measurable difference).On smaller systems, performance and fairness seems to be generallyimproved. Using dbench on tmpfs as a test (that starts to run intokernel spinlock contention), a 2-socket OpenPOWER POWER9 system wastested with bare metal and KVM guest configurations. Results can befound here:https://github.com/linuxppc/issues/issues/305#issuecomment-663487453Observations are:- Queued spinlocks are equal when contention is insignificant, as expected and as measured with microbenchmarks.- When there is contention, on bare metal queued spinlocks have better throughput and max latency at all points.- When virtualised, queued spinlocks are slightly worse approaching peak throughput, but significantly better throughput and max latency at all points beyond peak, until queued spinlock maximum latency rises when clients are 2x vCPUs.The regressions haven't been analysed very well yet, there are a lotof things that can be tuned, particularly the paravirtualised locking,but the numbers already look like a good net win even on relativelysmall systems.Signed-off-by: Nicholas Piggin Acked-by: Peter Zijlstra (Intel) Acked-by: Waiman Long Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200724131423.1362108-4-npiggin@gmail.com List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

2aa9c199 - KVM: Move x86's version of struct kvm_mmu_memory_cache to common code

Fri, 03 Jul 2020 02:35:38 +0000

KVM: Move x86's version of struct kvm_mmu_memory_cache to common codeMove x86's 'struct kvm_mmu_memory_cache' to common code in anticipationof moving the entire x86 implementation code to common KVM and reusingit for arm64 and MIPS. Add a new architecture specific asm/kvm_types.hto control the existence and parameters of the struct. The new headeris needed to avoid a chicken-and-egg problem with asm/kvm_host.h as allarchitectures define instances of the struct in their vCPU structs.Add an asm-generic version of kvm_types.h to avoid having empty files onPPC and s390 in the long term, and for arm64 and mips in the short term.Suggested-by: Christoffer Dall Reviewed-by: Ben Gardon Signed-off-by: Sean Christopherson Message-Id: <20200703023545.8771-15-sean.j.christopherson@intel.com>Signed-off-by: Paolo Bonzini List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

630f289b - asm-generic: make more kernel-space headers mandatory

Thu, 02 Apr 2020 04:03:12 +0000

asm-generic: make more kernel-space headers mandatoryChange a header to mandatory-y if both of the following are met:[1] At least one architecture (except um) specifies it as generic-y in arch/*/include/asm/Kbuild[2] Every architecture (except um) either has its own implementation (arch/*/include/asm/*.h) or specifies it as generic-y in arch/*/include/asm/KbuildThis commit was generated by the following shell script.----------------------------------->8-----------------------------------arches=$(cd arch; ls -1 | sed -e '/Kconfig/d' -e '/um/d')tmpfile=$(mktemp)grep "^mandatory-y +=" include/asm-generic/Kbuild > $tmpfilefind arch -path 'arch/*/include/asm/Kbuild' | xargs sed -n 's/^generic-y += $.*$/\1/p' | sort -u |while read headerdo mandatory=yes for arch in $arches do if ! grep -q "generic-y += $header" arch/$arch/include/asm/Kbuild && ! [ -f arch/$arch/include/asm/$header ]; then mandatory=no break fi done if [ "$mandatory" = yes ]; then echo "mandatory-y += $header" >> $tmpfile for arch in $arches do sed -i "/generic-y += $header/d" arch/$arch/include/asm/Kbuild done fidonesed -i '/^mandatory-y +=/d' include/asm-generic/KbuildLANG=C sort $tmpfile >> include/asm-generic/Kbuild----------------------------------->8-----------------------------------One obvious benefit is the diff stat: 25 files changed, 52 insertions(+), 557 deletions(-)It is tedious to list generic-y for each arch that needs it.So, mandatory-y works like a fallback default (by just wrappingasm-generic one) when arch does not have a specific headerimplementation.See the following commits:def3f7cefe4e81c296090e1722a76551142c227ca1b39bae16a62ce4aae02d958224f19316d98b24It is tedious to convert headers one by one, so I processed by a shellscript.Signed-off-by: Masahiro Yamada Signed-off-by: Andrew Morton Cc: Michal Simek Cc: Christoph Hellwig Cc: Arnd Bergmann Link: http://lkml.kernel.org/r/20200210175452.5030-1-masahiroy@kernel.orgSigned-off-by: Linus Torvalds List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

a1b39bae - asm-generic: Make msi.h a mandatory include/asm header

Fri, 25 Oct 2019 06:10:37 +0000

asm-generic: Make msi.h a mandatory include/asm headermsi.h is generic for all architectures except x86, which has its ownversion. Enabling MSI by adding msi.h to every architecture's Kbuild isjust an additional step which doesn't need to be done.Make msi.h mandatory in the asm-generic/Kbuild so we don't have to do itfor each architecture.Suggested-by: Christoph Hellwig Link: https://lore.kernel.org/r/c991669e29a79b1a8e28c3b4b3a125801a693de8.1571983829.git.michal.simek@xilinx.comTested-by: Paul Walmsley # build only, rv32/rv64Signed-off-by: Michal Simek Signed-off-by: Bjorn Helgaas Reviewed-by: Masahiro Yamada Acked-by: Waiman Long Acked-by: Paul Walmsley # arch/riscv List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

265c3491 - powerpc: Add support for GENERIC_EARLY_IOREMAP

Thu, 12 Sep 2019 13:49:43 +0000

powerpc: Add support for GENERIC_EARLY_IOREMAPAdd support for GENERIC_EARLY_IOREMAP.Let's define 16 slots of 256Kbytes each for early ioremap.Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/412c7eaa6a373d8f82a3c3ee01e6a65a1a6589de.1568295907.git.christophe.leroy@c-s.fr List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

f5817191 - powerpc: use

Wed, 07 Aug 2019 15:07:52 +0000

powerpc: use The powerpc version of dma-mapping.h only contains a version ofget_arch_dma_ops that always return NULL. Replace it with theasm-generic version that does the same.Signed-off-by: Christoph Hellwig Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190807150752.17894-1-hch@lst.de List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

155e4db3 - asm-generic: Remove redundant arch-specific rules for simd.h

Thu, 01 Aug 2019 02:11:33 +0000

asm-generic: Remove redundant arch-specific rules for simd.hNow that simd.h is in include/asm-generic/Kbuild we don't needthe arch-specific Kbuild rules for them.Reported-by: Stephen Rothwell Fixes: 82cb54856874 ("asm-generic: make simd.h a mandatory...")Signed-off-by: Herbert Xu Acked-by: Ard Biesheuvel Acked-by: Arnd Bergmann List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

96ac6d43 - treewide: Add SPDX license identifier - Kbuild

Thu, 30 May 2019 12:03:44 +0000

treewide: Add SPDX license identifier - KbuildAdd SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any formThese files fall under the project license, GPL v2 only. The resulting SPDXlicense identifier is: GPL-2.0Reported-by: Masahiro Yamada Signed-off-by: Greg Kroah-Hartman Reviewed-by: Kate Stewart Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

626ddb2f - crypto: powerpc - convert to use crypto_simd_usable()

Sat, 13 Apr 2019 05:33:12 +0000

crypto: powerpc - convert to use crypto_simd_usable()Replace all calls to in_interrupt() in the PowerPC crypto code with!crypto_simd_usable(). This causes the crypto self-tests to test theno-SIMD code paths when CONFIG_CRYPTO_MANAGER_EXTRA_TESTS=y.The p8_ghash algorithm is currently failing and needs to be fixed, as itproduces the wrong digest when no-SIMD updates are mixed with SIMD ones.Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

420af155 - powerpc/mmiowb: Hook up mmwiob() implementation to asm-generic code

Fri, 22 Feb 2019 14:45:42 +0000

powerpc/mmiowb: Hook up mmwiob() implementation to asm-generic codeIn a bid to kill off explicit mmiowb() usage in driver code, hook upthe asm-generic mmiowb() tracking code but provide a definition ofarch_mmiowb_state() so that the tracking data can remain in the pacaas it does at presentThis replaces the existing (flawed) implementation.Acked-by: Michael Ellerman Acked-by: Linus Torvalds Signed-off-by: Will Deacon List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

fdcd06a8 - arch: Use asm-generic header for asm/mmiowb.h

Fri, 22 Feb 2019 12:49:41 +0000

arch: Use asm-generic header for asm/mmiowb.hHook up asm-generic/mmiowb.h to Kbuild for all architectures so that wecan subsequently include asm/mmiowb.h from core code.Cc: Masahiro Yamada Cc: Arnd Bergmann Acked-by: Linus Torvalds Signed-off-by: Will Deacon List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

46ad0840 - locking/rwsem: Remove arch specific rwsem files

Fri, 22 Mar 2019 14:30:06 +0000

locking/rwsem: Remove arch specific rwsem filesAs the generic rwsem-xadd code is using the appropriate acquire andrelease versions of the atomic operations, the arch specific rwsem.hfiles will not be that much faster than the generic code as long as theatomic functions are properly implemented. So we can remove those archspecific rwsem.h and stop building asm/rwsem.h to reduce maintenanceeffort.Currently, only x86, alpha and ia64 have implemented architecturespecific fast paths. I don't have access to alpha and ia64 systems fortesting, but they are legacy systems that are not likely to be updatedto the latest kernel anyway.By using a rwsem microbenchmark, the total locking rates on a 4-socket56-core 112-thread x86-64 system before and after the patch were asfollows (mixed means equal # of read and write locks): Before Patch After Patch # of Threads wlock rlock mixed wlock rlock mixed ------------ ----- ----- ----- ----- ----- ----- 1 29,201 30,143 29,458 28,615 30,172 29,201 2 6,807 13,299 1,171 7,725 15,025 1,804 4 6,504 12,755 1,520 7,127 14,286 1,345 8 6,762 13,412 764 6,826 13,652 726 16 6,693 15,408 662 6,599 15,938 626 32 6,145 15,286 496 5,549 15,487 511 64 5,812 15,495 60 5,858 15,572 60There were some run-to-run variations for the multi-thread tests. Forx86-64, using the generic C code fast path seems to be a little bitfaster than the assembly version with low lock contention. Looking atthe assembly version of the fast paths, there are assembly to/from Ccode wrappers that save and restore all the callee-clobbered registers(7 registers on x86-64). The assembly generated from the generic Ccode doesn't need to do that. That may explain the slight performancegain here.The generic asm rwsem.h can also be merged into kernel/locking/rwsem.hwith no code change as no other code other than those underkernel/locking needs to access the internal rwsem macros and functions.Signed-off-by: Waiman Long Signed-off-by: Peter Zijlstra (Intel) Acked-by: Linus Torvalds Cc: Andrew Morton Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Davidlohr Bueso Cc: H. Peter Anvin Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Tim Chen Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.orgCc: linux-c6x-dev@linux-c6x.orgCc: linux-m68k@lists.linux-m68k.orgCc: linux-riscv@lists.infradead.orgCc: linux-um@lists.infradead.orgCc: linux-xtensa@linux-xtensa.orgCc: linuxppc-dev@lists.ozlabs.orgCc: nios2-dev@lists.rocketboards.orgCc: openrisc@lists.librecores.orgCc: uclinux-h8-devel@lists.sourceforge.jpLink: https://lkml.kernel.org/r/20190322143008.21313-2-longman@redhat.comSigned-off-by: Ingo Molnar List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

7cbbbb8b - kbuild: warn redundant generic-y

Sun, 17 Mar 2019 02:01:08 +0000

kbuild: warn redundant generic-yThe generic-y is redundant under the following condition: - arch has its own implementation - the same header is added to generated-y - the same header is added to mandatory-yIf a redundant generic-y is found, the warning like follows is displayed: scripts/Makefile.asm-generic:20: redundant generic-y found in arch/arm/include/asm/Kbuild: timex.hI fixed up arch Kbuild files found by this.Suggested-by: Sam Ravnborg Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

ab66dcc7 - powerpc: generate uapi header and system call table files

Mon, 17 Dec 2018 10:40:36 +0000

powerpc: generate uapi header and system call table filesSystem call table generation script must be run to gener-ate unistd_32/64.h and syscall_table_32/64/c32/spu.h files.This patch will have changes which will invokes the script.This patch will generate unistd_32/64.h and syscall_table-_32/64/c32/spu.h files by the syscall table generationscript invoked by parisc/Makefile and the generated filesagainst the removed files must be identical.The generated uapi header file will be included in uapi/-asm/unistd.h and generated system call table header filewill be included by kernel/systbl.S file.Signed-off-by: Firoz Khan Signed-off-by: Michael Ellerman List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild

e0af0c16 - arch: Remove clkdev.h asm-generic from Kbuild

Tue, 02 Jan 2018 23:50:06 +0000

arch: Remove clkdev.h asm-generic from KbuildNow that every architecture is using the generic clkdev.h fileand we no longer include asm/clkdev.h anywhere in the tree, wecan remove it.Cc: Russell King Acked-by: Arnd Bergmann Cc: Acked-by: Geert Uytterhoeven [m68k]Signed-off-by: Stephen Boyd List of files: /linux-6.15/arch/powerpc/include/asm/Kbuild