Changes in Kbuild

b5fa903b - fprobe: Add fprobe_header encoding feature

Thu, 26 Dec 2024 05:14:17 +0000

fprobe: Add fprobe_header encoding featureFprobe store its data structure address and size on the fgraph return stackby __fprobe_header. But most 64bit architecture can combine those toone unsigned long value because 4 MSB in the kernel address are the same.With this encoding, fprobe can consume less space on ret_stack.This introduces asm/fprobe.h to define arch dependent encode/decodemacros. Note that since fprobe depends on CONFIG_HAVE_FUNCTION_GRAPH_FREGS,currently only arm64, loongarch, riscv, s390 and x86 are supported.Signed-off-by: Masami Hiramatsu (Google) Acked-by: Heiko Carstens # s390Cc: Catalin Marinas Cc: Alexei Starovoitov Cc: Florent Revest Cc: Martin KaFai Lau Cc: bpf Cc: Alexei Starovoitov Cc: Jiri Olsa Cc: Alan Maguire Cc: Mark Rutland Cc: Heiko Carstens Cc: Will Deacon Cc: Huacai Chen Cc: WANG Xuerui Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: Vasily Gorbik Cc: Alexander Gordeev Cc: Christian Borntraeger Cc: Sven Schnelle Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: x86@kernel.orgCc: "H. Peter Anvin" Cc: Arnd Bergmann Cc: Masami Hiramatsu Cc: Mathieu Desnoyers Link: https://lore.kernel.org/173519005783.391279.5307910947400277525.stgit@devnote2Signed-off-by: Steven Rostedt (Google) List of files: /linux-6.15/arch/riscv/include/asm/Kbuild

ab83647f - riscv: Add qspinlock support

Sun, 03 Nov 2024 14:51:53 +0000

riscv: Add qspinlock supportIn order to produce a generic kernel, a user can selectCONFIG_COMBO_SPINLOCKS which will fallback at runtime to the ticketspinlock implementation if Zabha or Ziccrse are not present.Note that we can't use alternatives here because the discovery ofextensions is done too late and we need to start with the qspinlockimplementation because the ticket spinlock implementation would pollutethe spinlock value, so let's use static keys.This is largely based on Guo's work and Leonardo reviews at [1].Link: https://lore.kernel.org/linux-riscv/20231225125847.2778638-1-guoren@kernel.org/ [1]Signed-off-by: Guo Ren Signed-off-by: Alexandre Ghiti Reviewed-by: Andrea Parri Link: https://lore.kernel.org/r/20241103145153.105097-14-alexghiti@rivosinc.comSigned-off-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/include/asm/Kbuild

46bcce50 - arch, mm: move definition of node_data to generic code

Wed, 07 Aug 2024 06:40:51 +0000

arch, mm: move definition of node_data to generic codeEvery architecture that supports NUMA defines node_data in the same way: struct pglist_data *node_data[MAX_NUMNODES];No reason to keep multiple copies of this definition and its forwarddeclarations, especially when such forward declaration is the only thingin include/asm/mmzone.h for many architectures.Add definition and declaration of node_data to generic code and droparchitecture-specific versions.Link: https://lkml.kernel.org/r/20240807064110.1003856-8-rppt@kernel.orgSigned-off-by: Mike Rapoport (Microsoft) Acked-by: David Hildenbrand Reviewed-by: Jonathan Cameron Acked-by: Davidlohr Bueso Tested-by: Zi Yan # for x86_64 and arm64Tested-by: Jonathan Cameron [arm64 + CXL via QEMU]Acked-by: Dan Williams Cc: Alexander Gordeev Cc: Andreas Larsson Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christophe Leroy Cc: Dave Hansen Cc: David S. Miller Cc: Greg Kroah-Hartman Cc: Heiko Carstens Cc: Huacai Chen Cc: Ingo Molnar Cc: Jiaxun Yang Cc: John Paul Adrian Glaubitz Cc: Jonathan Corbet Cc: Michael Ellerman Cc: Palmer Dabbelt Cc: Rafael J. Wysocki Cc: Rob Herring (Arm) Cc: Samuel Holland Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Will Deacon Signed-off-by: Andrew Morton List of files: /linux-6.15/arch/riscv/include/asm/Kbuild

3db80c99 - riscv: convert to generic syscall table

Wed, 24 Apr 2024 07:14:39 +0000

riscv: convert to generic syscall tableThe uapi/asm/unistd_{32,64}.h and asm/syscall_table_{32,64}.h headers cannow be generated from scripts/syscall.tbl, which makes this consistentwith the other architectures that have their own syscall.tbl.riscv has two extra system call that gets added to scripts/syscall.tbl.The newstat and rlimit entries in the syscall_abis_64 line are for systemcalls that were part of the generic ABI when riscv64 got added but areno longer enabled by default for new architectures. Both riscv32 andriscv64 also implement memfd_secret, which is optional for allarchitectures.Unlike all the other 32-bit architectures, the time32 and stat64sets of syscalls are not enabled on riscv32.Both the user visible side of asm/unistd.h and the internal syscalltable in the kernel should have the same effective contents after this.Signed-off-by: Arnd Bergmann List of files: /linux-6.15/arch/riscv/include/asm/Kbuild

c9c0b0ba - RISC-V: Move to queued RW locks

Wed, 16 Mar 2022 23:11:33 +0000

RISC-V: Move to queued RW locksNow that we have fair spinlocks we can use the generic queued rwlocks,so we might as well do so.Reviewed-by: Arnd Bergmann Signed-off-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/include/asm/Kbuild

4922a3ea - RISC-V: Move to generic spinlocks

Wed, 16 Mar 2022 23:07:34 +0000

RISC-V: Move to generic spinlocksOur existing spinlocks aren't fair and replacing them has been on theTODO list for a long time. This moves to the recently-introduced ticketspinlocks, which are simple enough that they are likely to be correctand fast on the vast majority of extant implementations.This introduces a horrible hack that allows us to split out the spinlockconversion from the rwlock conversion. We have to do the spinlocksfirst because qrwlock needs fair spinlocks, but we don't want to pollutethe asm-generic code to support the generic spinlocks without qrwlocks.Thus we pollute the RISC-V code, but just until the next commit as it'sall going away.Reviewed-by: Arnd Bergmann Reviewed-by: Guo Ren Tested-by: Heiko Stuebner Tested-by: Conor Dooley Signed-off-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/include/asm/Kbuild

66bcd060 - parport_pc: Also enable driver for PCI systems

Mon, 14 Feb 2022 20:16:50 +0000

parport_pc: Also enable driver for PCI systemsNowadays PC-style parallel ports come in the form of PCI and PCIe optioncards and there are some combined parallel/serial option cards as wellthat we handle in the parport subsystem. There is nothing in particularthat would prevent them from being used in any system equipped with PCIor PCIe connectivity, except that we do not permit the PARPORT_PC configoption to be selected for platforms for which ARCH_MIGHT_HAVE_PC_PARPORThas not been set for.The only PCI platforms that actually can't make use of PC-style parallelport hardware are those newer PCIe systems that have no support for I/Ocycles in the host bridge, required by such parallel ports. Notably,this includes the s390 arch, which has port I/O accessors that causecompilation warnings (promoted to errors with `-Werror'), and there areother cases such as the POWER9 PHB4 device, though this one has variableport I/O accessors that depend on the particular system. Also it is notclear whether the serial port side of devices enabled by PARPORT_SERIALuses port I/O or MMIO. Finally Super I/O solutions are always eitherISA or platform devices.Make the PARPORT_PC option selectable also for PCI systems then, exceptfor the s390 arch, however limit the availability of PARPORT_PC_SUPERIOto platforms that enable ARCH_MIGHT_HAVE_PC_PARPORT. Update platformsaccordingly for the required header.Acked-by: Sudip Mukherjee Signed-off-by: Maciej W. Rozycki Link: https://lore.kernel.org/r/alpine.DEB.2.21.2202141955550.34636@angie.orcam.me.ukSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/arch/riscv/include/asm/Kbuild

bb1f85d6 - riscv: switch to relative exception tables

Thu, 18 Nov 2021 11:22:51 +0000

riscv: switch to relative exception tablesSimilar as other architectures such as arm64, x86 and so on, useoffsets relative to the exception table entry values rather thanabsolute addresses for both the exception locationand the fixup.However, RISCV label difference will actually produce two relocations,a pair of R_RISCV_ADD32 and R_RISCV_SUB32. Take below simple code forexample:$ cat test.S.section .text1: nop.section __ex_table,"a" .balign 4 .long (1b - .).previous$ riscv64-linux-gnu-gcc -c test.S$ riscv64-linux-gnu-readelf -r test.oRelocation section '.rela__ex_table' at offset 0x100 contains 2 entries: Offset Info Type Sym. Value Sym. Name + Addend000000000000 000600000023 R_RISCV_ADD32 0000000000000000 .L1^B1 + 0000000000000 000500000027 R_RISCV_SUB32 0000000000000000 .L0 + 0The modpost will complain the R_RISCV_SUB32 relocation, so we need topatch modpost.c to skip this relocation for .rela__ex_table section.After this patch, the __ex_table section size of defconfig vmlinux isreduced from 7072 Bytes to 3536 Bytes.Signed-off-by: Jisheng Zhang Reviewed-by: Kefeng Wang Signed-off-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/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/riscv/include/asm/Kbuild

6262f661 - RISC-V: Add early ioremap support

Thu, 17 Sep 2020 22:37:11 +0000

RISC-V: Add early ioremap supportUEFI uses early IO or memory mappings for runtime services beforenormal ioremap() is usable. Add the necessary fixmap bindings andpmd mappings for generic ioremap support to work.Signed-off-by: Atish Patra Reviewed-by: Anup Patel Reviewed-by: Palmer Dabbelt Signed-off-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/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/riscv/include/asm/Kbuild

def3f7ce - asm-generic: Make dma-contiguous.h a mandatory include/asm header

Fri, 17 Jan 2020 07:48:17 +0000

asm-generic: Make dma-contiguous.h a mandatory include/asm headerdma-continuguous.h is generic for all architectures except arm32 which hasits own version.Similar change was done for msi.h by commit a1b39bae16a6("asm-generic: Make msi.h a mandatory include/asm header")Suggested-by: Christoph Hellwig Link: https://lore.kernel.org/linux-arm-kernel/20200117080446.GA8980@lst.de/T/#m92bb56b04161057635d4142e1b3b9b6b0a70122eSigned-off-by: Michal Simek Reviewed-by: Christoph Hellwig Acked-by: Thomas Gleixner Acked-by: Arnd Bergmann Acked-by: Paul Walmsley # for arch/riscv List of files: /linux-6.15/arch/riscv/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/riscv/include/asm/Kbuild

251a4488 - riscv: include generic support for MSI irqdomains

Mon, 20 May 2019 17:29:26 +0000

riscv: include generic support for MSI irqdomainsSome RISC-V systems include PCIe host controllers that support PCIemessage-signaled interrupts. For this to work on Linux, we need toenable PCI_MSI_IRQ_DOMAIN and define struct msi_alloc_info. Supportfor the latter is enabled by including the architecture-generic msi.hinclude.Signed-off-by: Wesley Terpstra [paul.walmsley@sifive.com: split initial patch into one arch/riscv patch and one drivers/pci patch]Signed-off-by: Paul Walmsley List of files: /linux-6.15/arch/riscv/include/asm/Kbuild

ad97f9df - riscv: add binfmt_flat support

Thu, 13 Jun 2019 07:09:03 +0000

riscv: add binfmt_flat supportJust use the generic definitions.Signed-off-by: Christoph Hellwig Signed-off-by: Greg Ungerer List of files: /linux-6.15/arch/riscv/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/riscv/include/asm/Kbuild

33ff99fb - arch: remove dangling asm-generic wrappers

Thu, 09 May 2019 07:59:34 +0000

arch: remove dangling asm-generic wrappersThese generic-y defines do not have the corresponding generic headerin include/asm-generic/, so they are definitely invalid.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/riscv/include/asm/Kbuild

df720961 - riscv: use asm-generic/extable.h

Mon, 15 Apr 2019 09:14:32 +0000

riscv: use asm-generic/extable.hSigned-off-by: Christoph Hellwig Signed-off-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/include/asm/Kbuild

b012980d - riscv/mmiowb: Hook up mmwiob() implementation to asm-generic code

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

riscv/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 for riscv, so that an mmiowb()is automatically issued from spin_unlock() if an I/O write was performedin the critical section.Reviewed-by: Palmer Dabbelt Acked-by: Linus Torvalds Signed-off-by: Will Deacon List of files: /linux-6.15/arch/riscv/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/riscv/include/asm/Kbuild