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xor: move generic implementations out of asm-generic/xor.h

Browse Source 
Move the generic implementations from asm-generic/xor.h to
per-implementaion .c files in lib/raid.  This will build them
unconditionally even when an architecture forces a specific
implementation, but as we'll need at least one generic version for the
static_call optimization later on we'll pay that price.

Note that this would cause the second xor_block_8regs instance created by
arch/arm/lib/xor-neon.c to be generated instead of discarded as dead code,
so add a NO_TEMPLATE symbol to disable it for this case.

Link: https://lkml.kernel.org/r/20260327061704.3707577-11-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>
This commit is contained in:
Christoph Hellwig
2026-03-27 07:16:42 +01:00
committed by Andrew Morton
parent 35ebc4de10
commit c46928fdcf
7 changed files with 748 additions and 725 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm/lib/xor-neon.c
View File

@@ -26,8 +26,8 @@ MODULE_LICENSE("GPL");
#pragma GCC optimize "tree-vectorize"
#endif
#pragma GCC diagnostic ignored "-Wunused-variable"
#include <asm-generic/xor.h>
#define NO_TEMPLATE
#include "../../../lib/raid/xor/xor-8regs.c"
struct xor_block_template const xor_block_neon_inner = {
.name = "__inner_neon__",

727
include/asm-generic/xor.h
View File

@@ -5,726 +5,7 @@
* Generic optimized RAID-5 checksumming functions.
*/
#include <linux/prefetch.h>
static void
xor_8regs_2(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
long lines = bytes / (sizeof (long)) / 8;
do {
p1[0] ^= p2[0];
p1[1] ^= p2[1];
p1[2] ^= p2[2];
p1[3] ^= p2[3];
p1[4] ^= p2[4];
p1[5] ^= p2[5];
p1[6] ^= p2[6];
p1[7] ^= p2[7];
p1 += 8;
p2 += 8;
} while (--lines > 0);
}
static void
xor_8regs_3(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
long lines = bytes / (sizeof (long)) / 8;
do {
p1[0] ^= p2[0] ^ p3[0];
p1[1] ^= p2[1] ^ p3[1];
p1[2] ^= p2[2] ^ p3[2];
p1[3] ^= p2[3] ^ p3[3];
p1[4] ^= p2[4] ^ p3[4];
p1[5] ^= p2[5] ^ p3[5];
p1[6] ^= p2[6] ^ p3[6];
p1[7] ^= p2[7] ^ p3[7];
p1 += 8;
p2 += 8;
p3 += 8;
} while (--lines > 0);
}
static void
xor_8regs_4(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
long lines = bytes / (sizeof (long)) / 8;
do {
p1[0] ^= p2[0] ^ p3[0] ^ p4[0];
p1[1] ^= p2[1] ^ p3[1] ^ p4[1];
p1[2] ^= p2[2] ^ p3[2] ^ p4[2];
p1[3] ^= p2[3] ^ p3[3] ^ p4[3];
p1[4] ^= p2[4] ^ p3[4] ^ p4[4];
p1[5] ^= p2[5] ^ p3[5] ^ p4[5];
p1[6] ^= p2[6] ^ p3[6] ^ p4[6];
p1[7] ^= p2[7] ^ p3[7] ^ p4[7];
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
} while (--lines > 0);
}
static void
xor_8regs_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)
{
long lines = bytes / (sizeof (long)) / 8;
do {
p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0];
p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1];
p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2];
p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3];
p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4];
p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5];
p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6];
p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7];
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
p5 += 8;
} while (--lines > 0);
}
static void
xor_32regs_2(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
long lines = bytes / (sizeof (long)) / 8;
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
} while (--lines > 0);
}
static void
xor_32regs_3(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
long lines = bytes / (sizeof (long)) / 8;
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
} while (--lines > 0);
}
static void
xor_32regs_4(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
long lines = bytes / (sizeof (long)) / 8;
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
d0 ^= p4[0];
d1 ^= p4[1];
d2 ^= p4[2];
d3 ^= p4[3];
d4 ^= p4[4];
d5 ^= p4[5];
d6 ^= p4[6];
d7 ^= p4[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
} while (--lines > 0);
}
static void
xor_32regs_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)
{
long lines = bytes / (sizeof (long)) / 8;
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
d0 ^= p4[0];
d1 ^= p4[1];
d2 ^= p4[2];
d3 ^= p4[3];
d4 ^= p4[4];
d5 ^= p4[5];
d6 ^= p4[6];
d7 ^= p4[7];
d0 ^= p5[0];
d1 ^= p5[1];
d2 ^= p5[2];
d3 ^= p5[3];
d4 ^= p5[4];
d5 ^= p5[5];
d6 ^= p5[6];
d7 ^= p5[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
p5 += 8;
} while (--lines > 0);
}
static void
xor_8regs_p_2(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
do {
prefetchw(p1+8);
prefetch(p2+8);
once_more:
p1[0] ^= p2[0];
p1[1] ^= p2[1];
p1[2] ^= p2[2];
p1[3] ^= p2[3];
p1[4] ^= p2[4];
p1[5] ^= p2[5];
p1[6] ^= p2[6];
p1[7] ^= p2[7];
p1 += 8;
p2 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_8regs_p_3(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
do {
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
once_more:
p1[0] ^= p2[0] ^ p3[0];
p1[1] ^= p2[1] ^ p3[1];
p1[2] ^= p2[2] ^ p3[2];
p1[3] ^= p2[3] ^ p3[3];
p1[4] ^= p2[4] ^ p3[4];
p1[5] ^= p2[5] ^ p3[5];
p1[6] ^= p2[6] ^ p3[6];
p1[7] ^= p2[7] ^ p3[7];
p1 += 8;
p2 += 8;
p3 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_8regs_p_4(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
prefetch(p4);
do {
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
prefetch(p4+8);
once_more:
p1[0] ^= p2[0] ^ p3[0] ^ p4[0];
p1[1] ^= p2[1] ^ p3[1] ^ p4[1];
p1[2] ^= p2[2] ^ p3[2] ^ p4[2];
p1[3] ^= p2[3] ^ p3[3] ^ p4[3];
p1[4] ^= p2[4] ^ p3[4] ^ p4[4];
p1[5] ^= p2[5] ^ p3[5] ^ p4[5];
p1[6] ^= p2[6] ^ p3[6] ^ p4[6];
p1[7] ^= p2[7] ^ p3[7] ^ p4[7];
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_8regs_p_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)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
prefetch(p4);
prefetch(p5);
do {
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
prefetch(p4+8);
prefetch(p5+8);
once_more:
p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0];
p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1];
p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2];
p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3];
p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4];
p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5];
p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6];
p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7];
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
p5 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_32regs_p_2(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
prefetchw(p1+8);
prefetch(p2+8);
once_more:
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_32regs_p_3(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
once_more:
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_32regs_p_4(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
prefetch(p4);
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
prefetch(p4+8);
once_more:
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
d0 ^= p4[0];
d1 ^= p4[1];
d2 ^= p4[2];
d3 ^= p4[3];
d4 ^= p4[4];
d5 ^= p4[5];
d6 ^= p4[6];
d7 ^= p4[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_32regs_p_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)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
prefetch(p4);
prefetch(p5);
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
prefetch(p4+8);
prefetch(p5+8);
once_more:
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
d0 ^= p4[0];
d1 ^= p4[1];
d2 ^= p4[2];
d3 ^= p4[3];
d4 ^= p4[4];
d5 ^= p4[5];
d6 ^= p4[6];
d7 ^= p4[7];
d0 ^= p5[0];
d1 ^= p5[1];
d2 ^= p5[2];
d3 ^= p5[3];
d4 ^= p5[4];
d5 ^= p5[5];
d6 ^= p5[6];
d7 ^= p5[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
p5 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static struct xor_block_template xor_block_8regs = {
.name = "8regs",
.do_2 = xor_8regs_2,
.do_3 = xor_8regs_3,
.do_4 = xor_8regs_4,
.do_5 = xor_8regs_5,
};
static struct xor_block_template xor_block_32regs = {
.name = "32regs",
.do_2 = xor_32regs_2,
.do_3 = xor_32regs_3,
.do_4 = xor_32regs_4,
.do_5 = xor_32regs_5,
};
static struct xor_block_template xor_block_8regs_p __maybe_unused = {
.name = "8regs_prefetch",
.do_2 = xor_8regs_p_2,
.do_3 = xor_8regs_p_3,
.do_4 = xor_8regs_p_4,
.do_5 = xor_8regs_p_5,
};
static struct xor_block_template xor_block_32regs_p __maybe_unused = {
.name = "32regs_prefetch",
.do_2 = xor_32regs_p_2,
.do_3 = xor_32regs_p_3,
.do_4 = xor_32regs_p_4,
.do_5 = xor_32regs_p_5,
};
extern struct xor_block_template xor_block_8regs;
extern struct xor_block_template xor_block_32regs;
extern struct xor_block_template xor_block_8regs_p;
extern struct xor_block_template xor_block_32regs_p;

4
lib/raid/xor/Makefile
View File

@@ -3,3 +3,7 @@
obj-$(CONFIG_XOR_BLOCKS) += xor.o
xor-y += xor-core.o
xor-y += xor-8regs.o
xor-y += xor-32regs.o
xor-y += xor-8regs-prefetch.o
xor-y += xor-32regs-prefetch.o

268
lib/raid/xor/xor-32regs-prefetch.c Normal file
View File

@@ -0,0 +1,268 @@
// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/prefetch.h>
#include <linux/raid/xor_impl.h>
#include <asm-generic/xor.h>
static void
xor_32regs_p_2(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
prefetchw(p1+8);
prefetch(p2+8);
once_more:
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_32regs_p_3(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
once_more:
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_32regs_p_4(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
prefetch(p4);
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
prefetch(p4+8);
once_more:
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
d0 ^= p4[0];
d1 ^= p4[1];
d2 ^= p4[2];
d3 ^= p4[3];
d4 ^= p4[4];
d5 ^= p4[5];
d6 ^= p4[6];
d7 ^= p4[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_32regs_p_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)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
prefetch(p4);
prefetch(p5);
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
prefetch(p4+8);
prefetch(p5+8);
once_more:
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
d0 ^= p4[0];
d1 ^= p4[1];
d2 ^= p4[2];
d3 ^= p4[3];
d4 ^= p4[4];
d5 ^= p4[5];
d6 ^= p4[6];
d7 ^= p4[7];
d0 ^= p5[0];
d1 ^= p5[1];
d2 ^= p5[2];
d3 ^= p5[3];
d4 ^= p5[4];
d5 ^= p5[5];
d6 ^= p5[6];
d7 ^= p5[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
p5 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
struct xor_block_template xor_block_32regs_p = {
.name = "32regs_prefetch",
.do_2 = xor_32regs_p_2,
.do_3 = xor_32regs_p_3,
.do_4 = xor_32regs_p_4,
.do_5 = xor_32regs_p_5,
};

219
lib/raid/xor/xor-32regs.c Normal file
View File

@@ -0,0 +1,219 @@
// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/raid/xor_impl.h>
#include <asm-generic/xor.h>
static void
xor_32regs_2(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
long lines = bytes / (sizeof (long)) / 8;
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
} while (--lines > 0);
}
static void
xor_32regs_3(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
long lines = bytes / (sizeof (long)) / 8;
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
} while (--lines > 0);
}
static void
xor_32regs_4(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
long lines = bytes / (sizeof (long)) / 8;
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
d0 ^= p4[0];
d1 ^= p4[1];
d2 ^= p4[2];
d3 ^= p4[3];
d4 ^= p4[4];
d5 ^= p4[5];
d6 ^= p4[6];
d7 ^= p4[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
} while (--lines > 0);
}
static void
xor_32regs_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)
{
long lines = bytes / (sizeof (long)) / 8;
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
d0 ^= p4[0];
d1 ^= p4[1];
d2 ^= p4[2];
d3 ^= p4[3];
d4 ^= p4[4];
d5 ^= p4[5];
d6 ^= p4[6];
d7 ^= p4[7];
d0 ^= p5[0];
d1 ^= p5[1];
d2 ^= p5[2];
d3 ^= p5[3];
d4 ^= p5[4];
d5 ^= p5[5];
d6 ^= p5[6];
d7 ^= p5[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
p5 += 8;
} while (--lines > 0);
}
struct xor_block_template xor_block_32regs = {
.name = "32regs",
.do_2 = xor_32regs_2,
.do_3 = xor_32regs_3,
.do_4 = xor_32regs_4,
.do_5 = xor_32regs_5,
};

146
lib/raid/xor/xor-8regs-prefetch.c Normal file
View File

@@ -0,0 +1,146 @@
// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/prefetch.h>
#include <linux/raid/xor_impl.h>
#include <asm-generic/xor.h>
static void
xor_8regs_p_2(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
do {
prefetchw(p1+8);
prefetch(p2+8);
once_more:
p1[0] ^= p2[0];
p1[1] ^= p2[1];
p1[2] ^= p2[2];
p1[3] ^= p2[3];
p1[4] ^= p2[4];
p1[5] ^= p2[5];
p1[6] ^= p2[6];
p1[7] ^= p2[7];
p1 += 8;
p2 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_8regs_p_3(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
do {
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
once_more:
p1[0] ^= p2[0] ^ p3[0];
p1[1] ^= p2[1] ^ p3[1];
p1[2] ^= p2[2] ^ p3[2];
p1[3] ^= p2[3] ^ p3[3];
p1[4] ^= p2[4] ^ p3[4];
p1[5] ^= p2[5] ^ p3[5];
p1[6] ^= p2[6] ^ p3[6];
p1[7] ^= p2[7] ^ p3[7];
p1 += 8;
p2 += 8;
p3 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_8regs_p_4(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
prefetch(p4);
do {
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
prefetch(p4+8);
once_more:
p1[0] ^= p2[0] ^ p3[0] ^ p4[0];
p1[1] ^= p2[1] ^ p3[1] ^ p4[1];
p1[2] ^= p2[2] ^ p3[2] ^ p4[2];
p1[3] ^= p2[3] ^ p3[3] ^ p4[3];
p1[4] ^= p2[4] ^ p3[4] ^ p4[4];
p1[5] ^= p2[5] ^ p3[5] ^ p4[5];
p1[6] ^= p2[6] ^ p3[6] ^ p4[6];
p1[7] ^= p2[7] ^ p3[7] ^ p4[7];
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_8regs_p_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)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
prefetch(p4);
prefetch(p5);
do {
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
prefetch(p4+8);
prefetch(p5+8);
once_more:
p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0];
p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1];
p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2];
p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3];
p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4];
p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5];
p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6];
p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7];
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
p5 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
struct xor_block_template xor_block_8regs_p = {
.name = "8regs_prefetch",
.do_2 = xor_8regs_p_2,
.do_3 = xor_8regs_p_3,
.do_4 = xor_8regs_p_4,
.do_5 = xor_8regs_p_5,
};

105
lib/raid/xor/xor-8regs.c Normal file
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@@ -0,0 +1,105 @@
// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/raid/xor_impl.h>
#include <asm-generic/xor.h>
static void
xor_8regs_2(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
long lines = bytes / (sizeof (long)) / 8;
do {
p1[0] ^= p2[0];
p1[1] ^= p2[1];
p1[2] ^= p2[2];
p1[3] ^= p2[3];
p1[4] ^= p2[4];
p1[5] ^= p2[5];
p1[6] ^= p2[6];
p1[7] ^= p2[7];
p1 += 8;
p2 += 8;
} while (--lines > 0);
}
static void
xor_8regs_3(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
long lines = bytes / (sizeof (long)) / 8;
do {
p1[0] ^= p2[0] ^ p3[0];
p1[1] ^= p2[1] ^ p3[1];
p1[2] ^= p2[2] ^ p3[2];
p1[3] ^= p2[3] ^ p3[3];
p1[4] ^= p2[4] ^ p3[4];
p1[5] ^= p2[5] ^ p3[5];
p1[6] ^= p2[6] ^ p3[6];
p1[7] ^= p2[7] ^ p3[7];
p1 += 8;
p2 += 8;
p3 += 8;
} while (--lines > 0);
}
static void
xor_8regs_4(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
long lines = bytes / (sizeof (long)) / 8;
do {
p1[0] ^= p2[0] ^ p3[0] ^ p4[0];
p1[1] ^= p2[1] ^ p3[1] ^ p4[1];
p1[2] ^= p2[2] ^ p3[2] ^ p4[2];
p1[3] ^= p2[3] ^ p3[3] ^ p4[3];
p1[4] ^= p2[4] ^ p3[4] ^ p4[4];
p1[5] ^= p2[5] ^ p3[5] ^ p4[5];
p1[6] ^= p2[6] ^ p3[6] ^ p4[6];
p1[7] ^= p2[7] ^ p3[7] ^ p4[7];
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
} while (--lines > 0);
}
static void
xor_8regs_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)
{
long lines = bytes / (sizeof (long)) / 8;
do {
p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0];
p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1];
p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2];
p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3];
p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4];
p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5];
p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6];
p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7];
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
p5 += 8;
} while (--lines > 0);
}
#ifndef NO_TEMPLATE
struct xor_block_template xor_block_8regs = {
.name = "8regs",
.do_2 = xor_8regs_2,
.do_3 = xor_8regs_3,
.do_4 = xor_8regs_4,
.do_5 = xor_8regs_5,
};
#endif /* NO_TEMPLATE */