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adfcf6e89b
Replace the static array of algorithms with a call to an architecture helper to register algorithms. This serves two purposes: it avoid having to register all algorithms in a single central place, and it removes the need for the priority field by just registering the algorithms that the architecture considers suitable for the currently running CPUs. [hch@lst.de: register avx512 after avx2] Link: https://lore.kernel.org/20260527074539.2292913-3-hch@lst.de Link: https://lore.kernel.org/20260518051804.462141-11-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Ard Biesheuvel <ardb@kernel.org> Tested-by: Ard Biesheuvel <ardb@kernel.org> # kunit only on arm64 Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Arnd Bergmann <arnd@arndb.de> Cc: "Borislav Petkov (AMD)" <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chris Mason <clm@fb.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: David Sterba <dsterba@suse.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Li Nan <linan122@huawei.com> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Song Liu <song@kernel.org> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: WANG Xuerui <kernel@xen0n.name> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2012 Intel Corporation
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* Copyright (C) 2017 Linaro Ltd. <ard.biesheuvel@linaro.org>
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*/
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#include <linux/mm.h>
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#include <linux/raid/pq.h>
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#include <asm/simd.h>
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#include "algos.h"
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#include "arm/neon.h"
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static void raid6_2data_recov_neon(int disks, size_t bytes, int faila,
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int failb, void **ptrs)
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{
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u8 *p, *q, *dp, *dq;
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const u8 *pbmul; /* P multiplier table for B data */
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const u8 *qmul; /* Q multiplier table (for both) */
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p = (u8 *)ptrs[disks - 2];
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q = (u8 *)ptrs[disks - 1];
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/*
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* Compute syndrome with zero for the missing data pages
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* Use the dead data pages as temporary storage for
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* delta p and delta q
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*/
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dp = (u8 *)ptrs[faila];
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ptrs[faila] = page_address(ZERO_PAGE(0));
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ptrs[disks - 2] = dp;
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dq = (u8 *)ptrs[failb];
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ptrs[failb] = page_address(ZERO_PAGE(0));
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ptrs[disks - 1] = dq;
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raid6_gen_syndrome(disks, bytes, ptrs);
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/* Restore pointer table */
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ptrs[faila] = dp;
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ptrs[failb] = dq;
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ptrs[disks - 2] = p;
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ptrs[disks - 1] = q;
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/* Now, pick the proper data tables */
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pbmul = raid6_vgfmul[raid6_gfexi[failb-faila]];
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qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila] ^
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raid6_gfexp[failb]]];
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scoped_ksimd()
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__raid6_2data_recov_neon(bytes, p, q, dp, dq, pbmul, qmul);
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}
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static void raid6_datap_recov_neon(int disks, size_t bytes, int faila,
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void **ptrs)
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{
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u8 *p, *q, *dq;
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const u8 *qmul; /* Q multiplier table */
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p = (u8 *)ptrs[disks - 2];
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q = (u8 *)ptrs[disks - 1];
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/*
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* Compute syndrome with zero for the missing data page
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* Use the dead data page as temporary storage for delta q
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*/
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dq = (u8 *)ptrs[faila];
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ptrs[faila] = page_address(ZERO_PAGE(0));
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ptrs[disks - 1] = dq;
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raid6_gen_syndrome(disks, bytes, ptrs);
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/* Restore pointer table */
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ptrs[faila] = dq;
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ptrs[disks - 1] = q;
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/* Now, pick the proper data tables */
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qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila]]];
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scoped_ksimd()
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__raid6_datap_recov_neon(bytes, p, q, dq, qmul);
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}
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const struct raid6_recov_calls raid6_recov_neon = {
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.data2 = raid6_2data_recov_neon,
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.datap = raid6_datap_recov_neon,
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.name = "neon",
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};
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