From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BA4493FEB0A for ; Fri, 27 Mar 2026 17:50:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774633848; cv=none; b=KlECKdP569bRMtgduDgALiSzHkGkyjTfL4IXxWIs/aKYfxBg8Y51rznsCqRg/bkq87MSu5HpDipw7+ih9opbFKiFvFHUAyXqTVYtL1d60eEb4IuFQay5hk/Jm8KH+Xe+0VNfnYkbYXDSddBRRBOE2t6Lxqyl9Anw61MwaZrWyB4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774633848; c=relaxed/simple; bh=TQXt5MaDJPGXXVezmWACW5Ux+uIIaB0DlLGydCgVHlQ=; h=Date:To:From:Subject:Message-Id; b=Y1E/VrwhykCkjTdBryuFKAKOT20UbX+PaJfP1TbFw8GSlfkei/DcOWYoBgz2bE8m+wYG0ao9hWqfI9odAkUzeFwFJlF8JYXvdrYfXb9Lo2q7pp0ThwQQQTcj0soFcNpxodzRCdScE4OKLJSsKVcW6AIqHYtJ6HYzh8EWZ/x5ygk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=JrkhQs6c; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="JrkhQs6c" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8CD0DC19423; Fri, 27 Mar 2026 17:50:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1774633848; bh=TQXt5MaDJPGXXVezmWACW5Ux+uIIaB0DlLGydCgVHlQ=; h=Date:To:From:Subject:From; b=JrkhQs6c/SHdMc6fernAkl4/Gi+6gJpr/9PRiKGJwiLxfTahdOCoQkyaOcHOrFlfG 7hB7tC5YMa44FKP/lxOpgFUp/fVZ+PuL44NqR0iUhth5zsTVDwpgYKiHg3cyOM47gN YtiYfxpMzLehvxtOFYcD70p1zzs7SseRYDlrbmOU= Date: Fri, 27 Mar 2026 10:50:47 -0700 To: mm-commits@vger.kernel.org,hch@lst.de,akpm@linux-foundation.org From: Andrew Morton Subject: + s390-move-the-xor-code-to-lib-raid.patch added to mm-nonmm-unstable branch Message-Id: <20260327175048.8CD0DC19423@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: s390: move the XOR code to lib/raid/ has been added to the -mm mm-nonmm-unstable branch. Its filename is s390-move-the-xor-code-to-lib-raid.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/s390-move-the-xor-code-to-lib-raid.patch This patch will later appear in the mm-nonmm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Christoph Hellwig Subject: s390: move the XOR code to lib/raid/ Date: Fri, 27 Mar 2026 07:16:50 +0100 Move the optimized XOR into lib/raid and include it it in xor.ko instead of unconditionally building it into the main kernel image. Link: https://lkml.kernel.org/r/20260327061704.3707577-19-hch@lst.de Signed-off-by: Christoph Hellwig Acked-by: Heiko Carstens Cc: Albert Ou Cc: Alexander Gordeev Cc: Alexandre Ghiti Cc: Andreas Larsson Cc: Anton Ivanov Cc: Ard Biesheuvel Cc: Arnd Bergmann Cc: "Borislav Petkov (AMD)" Cc: Catalin Marinas Cc: Chris Mason Cc: Christian Borntraeger Cc: Dan Williams Cc: David S. Miller Cc: David Sterba Cc: Herbert Xu Cc: "H. Peter Anvin" Cc: Huacai Chen Cc: Ingo Molnar Cc: Jason A. Donenfeld Cc: Johannes Berg Cc: Li Nan Cc: Madhavan Srinivasan Cc: Magnus Lindholm Cc: Matt Turner Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Palmer Dabbelt Cc: Richard Henderson Cc: Richard Weinberger Cc: Russell King Cc: Song Liu Cc: Sven Schnelle Cc: Ted Ts'o Cc: Vasily Gorbik Cc: WANG Xuerui Cc: Will Deacon Signed-off-by: Andrew Morton --- arch/s390/lib/Makefile | 2 arch/s390/lib/xor.c | 136 -------------------------------------- lib/raid/xor/Makefile | 1 lib/raid/xor/s390/xor.c | 134 +++++++++++++++++++++++++++++++++++++ 4 files changed, 136 insertions(+), 137 deletions(-) --- a/arch/s390/lib/Makefile~s390-move-the-xor-code-to-lib-raid +++ a/arch/s390/lib/Makefile @@ -5,7 +5,7 @@ lib-y += delay.o string.o uaccess.o find.o spinlock.o tishift.o lib-y += csum-partial.o -obj-y += mem.o xor.o +obj-y += mem.o lib-$(CONFIG_KPROBES) += probes.o lib-$(CONFIG_UPROBES) += probes.o obj-$(CONFIG_S390_KPROBES_SANITY_TEST) += test_kprobes_s390.o diff --git a/arch/s390/lib/xor.c a/arch/s390/lib/xor.c deleted file mode 100644 --- a/arch/s390/lib/xor.c +++ /dev/null @@ -1,136 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Optimized xor_block operation for RAID4/5 - * - * Copyright IBM Corp. 2016 - * Author(s): Martin Schwidefsky - */ - -#include -#include -#include -#include - -static void xor_xc_2(unsigned long bytes, unsigned long * __restrict p1, - const unsigned long * __restrict p2) -{ - asm volatile( - " aghi %0,-1\n" - " jm 3f\n" - " srlg 0,%0,8\n" - " ltgr 0,0\n" - " jz 1f\n" - "0: xc 0(256,%1),0(%2)\n" - " la %1,256(%1)\n" - " la %2,256(%2)\n" - " brctg 0,0b\n" - "1: exrl %0,2f\n" - " j 3f\n" - "2: xc 0(1,%1),0(%2)\n" - "3:" - : "+a" (bytes), "+a" (p1), "+a" (p2) - : : "0", "cc", "memory"); -} - -static void xor_xc_3(unsigned long bytes, unsigned long * __restrict p1, - const unsigned long * __restrict p2, - const unsigned long * __restrict p3) -{ - asm volatile( - " aghi %0,-1\n" - " jm 4f\n" - " srlg 0,%0,8\n" - " ltgr 0,0\n" - " jz 1f\n" - "0: xc 0(256,%1),0(%2)\n" - " xc 0(256,%1),0(%3)\n" - " la %1,256(%1)\n" - " la %2,256(%2)\n" - " la %3,256(%3)\n" - " brctg 0,0b\n" - "1: exrl %0,2f\n" - " exrl %0,3f\n" - " j 4f\n" - "2: xc 0(1,%1),0(%2)\n" - "3: xc 0(1,%1),0(%3)\n" - "4:" - : "+a" (bytes), "+a" (p1), "+a" (p2), "+a" (p3) - : : "0", "cc", "memory"); -} - -static void xor_xc_4(unsigned long bytes, unsigned long * __restrict p1, - const unsigned long * __restrict p2, - const unsigned long * __restrict p3, - const unsigned long * __restrict p4) -{ - asm volatile( - " aghi %0,-1\n" - " jm 5f\n" - " srlg 0,%0,8\n" - " ltgr 0,0\n" - " jz 1f\n" - "0: xc 0(256,%1),0(%2)\n" - " xc 0(256,%1),0(%3)\n" - " xc 0(256,%1),0(%4)\n" - " la %1,256(%1)\n" - " la %2,256(%2)\n" - " la %3,256(%3)\n" - " la %4,256(%4)\n" - " brctg 0,0b\n" - "1: exrl %0,2f\n" - " exrl %0,3f\n" - " exrl %0,4f\n" - " j 5f\n" - "2: xc 0(1,%1),0(%2)\n" - "3: xc 0(1,%1),0(%3)\n" - "4: xc 0(1,%1),0(%4)\n" - "5:" - : "+a" (bytes), "+a" (p1), "+a" (p2), "+a" (p3), "+a" (p4) - : : "0", "cc", "memory"); -} - -static void xor_xc_5(unsigned long bytes, unsigned long * __restrict p1, - const unsigned long * __restrict p2, - const unsigned long * __restrict p3, - const unsigned long * __restrict p4, - const unsigned long * __restrict p5) -{ - asm volatile( - " aghi %0,-1\n" - " jm 6f\n" - " srlg 0,%0,8\n" - " ltgr 0,0\n" - " jz 1f\n" - "0: xc 0(256,%1),0(%2)\n" - " xc 0(256,%1),0(%3)\n" - " xc 0(256,%1),0(%4)\n" - " xc 0(256,%1),0(%5)\n" - " la %1,256(%1)\n" - " la %2,256(%2)\n" - " la %3,256(%3)\n" - " la %4,256(%4)\n" - " la %5,256(%5)\n" - " brctg 0,0b\n" - "1: exrl %0,2f\n" - " exrl %0,3f\n" - " exrl %0,4f\n" - " exrl %0,5f\n" - " j 6f\n" - "2: xc 0(1,%1),0(%2)\n" - "3: xc 0(1,%1),0(%3)\n" - "4: xc 0(1,%1),0(%4)\n" - "5: xc 0(1,%1),0(%5)\n" - "6:" - : "+a" (bytes), "+a" (p1), "+a" (p2), "+a" (p3), "+a" (p4), - "+a" (p5) - : : "0", "cc", "memory"); -} - -struct xor_block_template xor_block_xc = { - .name = "xc", - .do_2 = xor_xc_2, - .do_3 = xor_xc_3, - .do_4 = xor_xc_4, - .do_5 = xor_xc_5, -}; -EXPORT_SYMBOL(xor_block_xc); --- a/lib/raid/xor/Makefile~s390-move-the-xor-code-to-lib-raid +++ a/lib/raid/xor/Makefile @@ -20,6 +20,7 @@ xor-$(CONFIG_ALTIVEC) += powerpc/xor_vm xor-$(CONFIG_RISCV_ISA_V) += riscv/xor.o riscv/xor-glue.o xor-$(CONFIG_SPARC32) += sparc/xor-sparc32.o xor-$(CONFIG_SPARC64) += sparc/xor-sparc64.o sparc/xor-sparc64-glue.o +xor-$(CONFIG_S390) += s390/xor.o CFLAGS_arm/xor-neon.o += $(CC_FLAGS_FPU) diff --git a/lib/raid/xor/s390/xor.c a/lib/raid/xor/s390/xor.c new file mode 100664 --- /dev/null +++ a/lib/raid/xor/s390/xor.c @@ -0,0 +1,134 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Optimized xor_block operation for RAID4/5 + * + * Copyright IBM Corp. 2016 + * Author(s): Martin Schwidefsky + */ + +#include +#include +#include + +static void xor_xc_2(unsigned long bytes, unsigned long * __restrict p1, + const unsigned long * __restrict p2) +{ + asm volatile( + " aghi %0,-1\n" + " jm 3f\n" + " srlg 0,%0,8\n" + " ltgr 0,0\n" + " jz 1f\n" + "0: xc 0(256,%1),0(%2)\n" + " la %1,256(%1)\n" + " la %2,256(%2)\n" + " brctg 0,0b\n" + "1: exrl %0,2f\n" + " j 3f\n" + "2: xc 0(1,%1),0(%2)\n" + "3:" + : "+a" (bytes), "+a" (p1), "+a" (p2) + : : "0", "cc", "memory"); +} + +static void xor_xc_3(unsigned long bytes, unsigned long * __restrict p1, + const unsigned long * __restrict p2, + const unsigned long * __restrict p3) +{ + asm volatile( + " aghi %0,-1\n" + " jm 4f\n" + " srlg 0,%0,8\n" + " ltgr 0,0\n" + " jz 1f\n" + "0: xc 0(256,%1),0(%2)\n" + " xc 0(256,%1),0(%3)\n" + " la %1,256(%1)\n" + " la %2,256(%2)\n" + " la %3,256(%3)\n" + " brctg 0,0b\n" + "1: exrl %0,2f\n" + " exrl %0,3f\n" + " j 4f\n" + "2: xc 0(1,%1),0(%2)\n" + "3: xc 0(1,%1),0(%3)\n" + "4:" + : "+a" (bytes), "+a" (p1), "+a" (p2), "+a" (p3) + : : "0", "cc", "memory"); +} + +static void xor_xc_4(unsigned long bytes, unsigned long * __restrict p1, + const unsigned long * __restrict p2, + const unsigned long * __restrict p3, + const unsigned long * __restrict p4) +{ + asm volatile( + " aghi %0,-1\n" + " jm 5f\n" + " srlg 0,%0,8\n" + " ltgr 0,0\n" + " jz 1f\n" + "0: xc 0(256,%1),0(%2)\n" + " xc 0(256,%1),0(%3)\n" + " xc 0(256,%1),0(%4)\n" + " la %1,256(%1)\n" + " la %2,256(%2)\n" + " la %3,256(%3)\n" + " la %4,256(%4)\n" + " brctg 0,0b\n" + "1: exrl %0,2f\n" + " exrl %0,3f\n" + " exrl %0,4f\n" + " j 5f\n" + "2: xc 0(1,%1),0(%2)\n" + "3: xc 0(1,%1),0(%3)\n" + "4: xc 0(1,%1),0(%4)\n" + "5:" + : "+a" (bytes), "+a" (p1), "+a" (p2), "+a" (p3), "+a" (p4) + : : "0", "cc", "memory"); +} + +static void xor_xc_5(unsigned long bytes, unsigned long * __restrict p1, + const unsigned long * __restrict p2, + const unsigned long * __restrict p3, + const unsigned long * __restrict p4, + const unsigned long * __restrict p5) +{ + asm volatile( + " aghi %0,-1\n" + " jm 6f\n" + " srlg 0,%0,8\n" + " ltgr 0,0\n" + " jz 1f\n" + "0: xc 0(256,%1),0(%2)\n" + " xc 0(256,%1),0(%3)\n" + " xc 0(256,%1),0(%4)\n" + " xc 0(256,%1),0(%5)\n" + " la %1,256(%1)\n" + " la %2,256(%2)\n" + " la %3,256(%3)\n" + " la %4,256(%4)\n" + " la %5,256(%5)\n" + " brctg 0,0b\n" + "1: exrl %0,2f\n" + " exrl %0,3f\n" + " exrl %0,4f\n" + " exrl %0,5f\n" + " j 6f\n" + "2: xc 0(1,%1),0(%2)\n" + "3: xc 0(1,%1),0(%3)\n" + "4: xc 0(1,%1),0(%4)\n" + "5: xc 0(1,%1),0(%5)\n" + "6:" + : "+a" (bytes), "+a" (p1), "+a" (p2), "+a" (p3), "+a" (p4), + "+a" (p5) + : : "0", "cc", "memory"); +} + +struct xor_block_template xor_block_xc = { + .name = "xc", + .do_2 = xor_xc_2, + .do_3 = xor_xc_3, + .do_4 = xor_xc_4, + .do_5 = xor_xc_5, +}; _ Patches currently in -mm which might be from hch@lst.de are xor-assert-that-xor_blocks-is-not-call-from-interrupt-context.patch arm-xor-remove-in_interrupt-handling.patch arm64-xor-fix-conflicting-attributes-for-xor_block_template.patch um-xor-cleanup-xorh.patch xor-move-to-lib-raid.patch xor-small-cleanups.patch xor-cleanup-registration-and-probing.patch xor-split-xorh.patch xor-remove-macro-abuse-for-xor-implementation-registrations.patch xor-move-generic-implementations-out-of-asm-generic-xorh.patch alpha-move-the-xor-code-to-lib-raid.patch arm-move-the-xor-code-to-lib-raid.patch arm64-move-the-xor-code-to-lib-raid.patch loongarch-move-the-xor-code-to-lib-raid.patch powerpc-move-the-xor-code-to-lib-raid.patch riscv-move-the-xor-code-to-lib-raid.patch sparc-move-the-xor-code-to-lib-raid.patch s390-move-the-xor-code-to-lib-raid.patch x86-move-the-xor-code-to-lib-raid.patch xor-avoid-indirect-calls-for-arm64-optimized-ops.patch xor-make-xorko-self-contained-in-lib-raid.patch xor-add-a-better-public-api.patch xor-add-a-better-public-api-2.patch async_xor-use-xor_gen.patch btrfs-use-xor_gen.patch xor-pass-the-entire-operation-to-the-low-level-ops.patch xor-use-static_call-for-xor_gen.patch xor-add-a-kunit-test-case.patch