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Currently the high-level xor code chunks up all operations into small units for only up to 1 + 4 vectors, and passes it to four different methods. This means the FPU/vector context is entered and left a lot for wide stripes, and a lot of indirect expensive indirect calls are performed. Switch to passing the entire gen_xor request to the low-level ops, and provide a macro to dispatch it to the existing helper. This reduce the number of indirect calls and FPU/vector context switches by a factor approaching nr_stripes / 4, and also reduces source and binary code size. Link: https://lkml.kernel.org/r/20260327061704.3707577-27-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Eric Biggers <ebiggers@kernel.org> Tested-by: Eric Biggers <ebiggers@kernel.org> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Andreas Larsson <andreas@gaisler.com> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com> Cc: Ard Biesheuvel <ardb@kernel.org> 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 S. Miller <davem@davemloft.net> 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: Jason A. Donenfeld <jason@zx2c4.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Li Nan <linan122@huawei.com> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Magnus Lindholm <linmag7@gmail.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Richard Henderson <richard.henderson@linaro.org> Cc: Richard Weinberger <richard@nod.at> Cc: Russell King <linux@armlinux.org.uk> Cc: Song Liu <song@kernel.org> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Ted Ts'o <tytso@mit.edu> 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>
23 lines
562 B
C
23 lines
562 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2001 Russell King
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*/
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#include <asm/neon.h>
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extern struct xor_block_template xor_block_arm4regs;
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extern struct xor_block_template xor_block_neon;
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void xor_gen_neon_inner(void *dest, void **srcs, unsigned int src_cnt,
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unsigned int bytes);
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static __always_inline void __init arch_xor_init(void)
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{
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xor_register(&xor_block_arm4regs);
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xor_register(&xor_block_8regs);
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xor_register(&xor_block_32regs);
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#ifdef CONFIG_KERNEL_MODE_NEON
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if (cpu_has_neon())
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xor_register(&xor_block_neon);
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#endif
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}
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