From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E9D00FD0640 for ; Wed, 11 Mar 2026 07:04:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=NDC4NgONmheom3VbSUYDu+rjZBRlrjecb6Ju0ev9UTM=; b=bK4skohiAO4Nbd 0jwSV8MsFHUzCJ7NJ20+m1aZbpbDiD7gHbfSPBccLp8JIwWEY0A9ijWQ8D5E79QRIwA9dFpQf6r9Z 49Im6hWK5s4G4hbv8Og7cUwzZUp/zHsoBfLQZYgno4pN+FBSOhZMwAuDubuuo9GyT44uUvQlLT/za Q03etufEaitggXAZi2yO8HQtf4WVHH1Ndrb0H/+bMz2N7FVbbv+JKp+t5l70RC4Nl4qY1kK2bdMG6 CXKtP0VuJjyo8vfhHyDb4Tr2YrEDn5gljIkNiKzuAKUQoUud3dWqLBto0WCSW/QwlHdkRp9of+4Yl nV0Sdiayx1TEVf+QjB7A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w0DcR-0000000Ay8E-3D2s; Wed, 11 Mar 2026 07:04:35 +0000 Received: from [212.243.42.10] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1w0DcK-0000000Ay6i-41SA; Wed, 11 Mar 2026 07:04:29 +0000 From: Christoph Hellwig To: Andrew Morton Cc: Richard Henderson , Matt Turner , Magnus Lindholm , Russell King , Catalin Marinas , Will Deacon , Huacai Chen , WANG Xuerui , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , "David S. Miller" , Andreas Larsson , Richard Weinberger , Anton Ivanov , Johannes Berg , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Herbert Xu , Dan Williams , Chris Mason , David Sterba , Arnd Bergmann , Song Liu , Yu Kuai , Li Nan , "Theodore Ts'o" , "Jason A. Donenfeld" , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-crypto@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-arch@vger.kernel.org, linux-raid@vger.kernel.org Subject: cleanup the RAID5 XOR library v2 Date: Wed, 11 Mar 2026 08:03:32 +0100 Message-ID: <20260311070416.972667-1-hch@lst.de> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Hi all, the XOR library used for the RAID5 parity is a bit of a mess right now. The main file sits in crypto/ despite not being cryptography and not using the crypto API, with the generic implementations sitting in include/asm-generic and the arch implementations sitting in an asm/ header in theory. The latter doesn't work for many cases, so architectures often build the code directly into the core kernel, or create another module for the architecture code. Changes this to a single module in lib/ that also contains the architecture optimizations, similar to the library work Eric Biggers has done for the CRC and crypto libraries later. After that it changes to better calling conventions that allow for smarter architecture implementations (although none is contained here yet), and uses static_call to avoid indirection function call overhead. A git tree is also available here: git://git.infradead.org/users/hch/misc.git xor-improvements Gitweb: https://git.infradead.org/?p=users/hch/misc.git;a=shortlog;h=refs/heads/xor-improvements Changes since v1: - use lockdep_assert_preemption_enabled() - improve the commit message for the initial um xor.h cleanup - further clean up the um arch specific header - add SPDX identifier to the new build system files - use bool for xor_forced - fix an incorrect printk level conversion from warn to info - include xor_impl.h in xor-neon.c - remove unused exports for riscv - simply move the sparc code instead of splititng it - simplify the makefile for the x86-specific implementations - remove stray references to xor_blocks in crypto/async_tx - rework __DO_XOR_BLOCKS to avoid (theoretical) out of bounds references - improve the kerneldoc API documentration for xor_gen() - spell the name of the srcs argument to xor_gen correctly in xor.h - add a kunit test, and a new random helper for it. Diffstat: arch/arm64/include/asm/xor.h | 73 -- arch/loongarch/include/asm/xor.h | 68 -- arch/loongarch/include/asm/xor_simd.h | 34 - arch/loongarch/lib/xor_simd_glue.c | 72 -- arch/powerpc/include/asm/xor.h | 47 - arch/powerpc/include/asm/xor_altivec.h | 22 arch/powerpc/lib/xor_vmx.h | 22 arch/powerpc/lib/xor_vmx_glue.c | 63 -- arch/riscv/include/asm/xor.h | 68 -- arch/s390/include/asm/xor.h | 21 arch/sparc/include/asm/xor.h | 9 arch/um/include/asm/xor.h | 24 arch/x86/include/asm/xor_64.h | 28 - b/arch/alpha/Kconfig | 1 b/arch/arm/Kconfig | 1 b/arch/arm/lib/Makefile | 5 b/arch/arm64/Kconfig | 1 b/arch/arm64/lib/Makefile | 6 b/arch/loongarch/Kconfig | 1 b/arch/loongarch/lib/Makefile | 2 b/arch/powerpc/Kconfig | 1 b/arch/powerpc/lib/Makefile | 5 b/arch/riscv/Kconfig | 1 b/arch/riscv/lib/Makefile | 1 b/arch/s390/Kconfig | 1 b/arch/s390/lib/Makefile | 2 b/arch/sparc/Kconfig | 1 b/arch/sparc/include/asm/asm-prototypes.h | 1 b/arch/sparc/lib/Makefile | 2 b/arch/um/Kconfig | 1 b/arch/x86/Kconfig | 1 b/crypto/Kconfig | 2 b/crypto/Makefile | 1 b/crypto/async_tx/async_xor.c | 34 - b/drivers/char/random.c | 26 - b/fs/btrfs/raid56.c | 27 - b/include/asm-generic/Kbuild | 1 b/include/linux/raid/xor.h | 27 - b/include/linux/random.h | 1 b/lib/Kconfig | 1 b/lib/Makefile | 2 b/lib/raid/Kconfig | 19 b/lib/raid/Makefile | 3 b/lib/raid/xor/Makefile | 43 + b/lib/raid/xor/alpha/xor.c | 46 - b/lib/raid/xor/alpha/xor_arch.h | 22 b/lib/raid/xor/arm/xor-neon-glue.c | 19 b/lib/raid/xor/arm/xor-neon.c | 22 b/lib/raid/xor/arm/xor.c | 105 ---- b/lib/raid/xor/arm/xor_arch.h | 22 b/lib/raid/xor/arm64/xor-neon-glue.c | 26 + b/lib/raid/xor/arm64/xor-neon.c | 94 +-- b/lib/raid/xor/arm64/xor-neon.h | 6 b/lib/raid/xor/arm64/xor_arch.h | 21 b/lib/raid/xor/loongarch/xor_arch.h | 33 + b/lib/raid/xor/loongarch/xor_simd_glue.c | 37 + b/lib/raid/xor/powerpc/xor_arch.h | 22 b/lib/raid/xor/powerpc/xor_vmx.c | 40 - b/lib/raid/xor/powerpc/xor_vmx.h | 10 b/lib/raid/xor/powerpc/xor_vmx_glue.c | 28 + b/lib/raid/xor/riscv/xor-glue.c | 25 + b/lib/raid/xor/riscv/xor.S | 4 b/lib/raid/xor/riscv/xor_arch.h | 17 b/lib/raid/xor/s390/xor.c | 15 b/lib/raid/xor/s390/xor_arch.h | 13 b/lib/raid/xor/sparc/xor-sparc32.c | 32 - b/lib/raid/xor/sparc/xor-sparc64-glue.c | 48 - b/lib/raid/xor/sparc/xor-sparc64.S | 10 b/lib/raid/xor/sparc/xor_arch.h | 35 + b/lib/raid/xor/tests/Makefile | 3 b/lib/raid/xor/tests/xor_kunit.c | 180 +++++++ b/lib/raid/xor/um/xor_arch.h | 2 b/lib/raid/xor/x86/xor-avx.c | 52 -- b/lib/raid/xor/x86/xor-mmx.c | 120 +--- b/lib/raid/xor/x86/xor-sse.c | 105 +--- b/lib/raid/xor/x86/xor_arch.h | 36 + b/lib/raid/xor/xor-32regs-prefetch.c | 267 ++++++++++ b/lib/raid/xor/xor-32regs.c | 217 ++++++++ b/lib/raid/xor/xor-8regs-prefetch.c | 146 +++++ b/lib/raid/xor/xor-8regs.c | 103 ++++ b/lib/raid/xor/xor-core.c | 191 +++++++ b/lib/raid/xor/xor_impl.h | 60 ++ crypto/xor.c | 174 ------- include/asm-generic/xor.h | 738 ------------------------------ 84 files changed, 1840 insertions(+), 2078 deletions(-) _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv