ARM: 9480/1: entry: expand comment in __switch_tografted

As per discussion between the developers in the mail thread
linked, expand the comment in __switch_to so that readers
of the code understand what is going on.

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

45 files changed, 5634 insertions, 0 deletions

diff --git a/lib/raid/.kunitconfig b/lib/raid/.kunitconfig
new file mode 100644
index 000000000..351d22ed1
--- /dev/null
+++ b/lib/raid/.kunitconfig
@@ -0,0 +1,3 @@
+CONFIG_KUNIT=y
+CONFIG_BTRFS_FS=y
+CONFIG_XOR_KUNIT_TEST=y
diff --git a/lib/raid/Kconfig b/lib/raid/Kconfig
new file mode 100644
index 000000000..5ab2b0a7b
--- /dev/null
+++ b/lib/raid/Kconfig
@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config XOR_BLOCKS
+	tristate
+
+# selected by architectures that provide an optimized XOR implementation
+config XOR_BLOCKS_ARCH
+	depends on XOR_BLOCKS
+	default y if ALPHA
+	default y if ARM
+	default y if ARM64
+	default y if CPU_HAS_LSX		# loongarch
+	default y if ALTIVEC			# powerpc
+	default y if RISCV_ISA_V
+	default y if SPARC
+	default y if S390
+	default y if X86_32
+	default y if X86_64
+	bool
+
+config XOR_KUNIT_TEST
+	tristate "KUnit tests for xor_gen" if !KUNIT_ALL_TESTS
+	depends on KUNIT
+	depends on XOR_BLOCKS
+	default KUNIT_ALL_TESTS
+	help
+	  Unit tests for the XOR library functions.
+
+	  This is intended to help people writing architecture-specific
+	  optimized versions.  If unsure, say N.
diff --git a/lib/raid/Makefile b/lib/raid/Makefile
new file mode 100644
index 000000000..3540fe846
--- /dev/null
+++ b/lib/raid/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-y				+= xor/
diff --git a/lib/raid/xor/Makefile b/lib/raid/xor/Makefile
new file mode 100644
index 000000000..4d633dfd5
--- /dev/null
+++ b/lib/raid/xor/Makefile
@@ -0,0 +1,42 @@
+# SPDX-License-Identifier: GPL-2.0
+
+ccflags-y			+= -I $(src)
+
+obj-$(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
+
+ifeq ($(CONFIG_XOR_BLOCKS_ARCH),y)
+CFLAGS_xor-core.o		+= -I$(src)/$(SRCARCH)
+endif
+
+xor-$(CONFIG_ALPHA)		+= alpha/xor.o
+xor-$(CONFIG_ARM)		+= arm/xor.o
+ifeq ($(CONFIG_ARM),y)
+xor-$(CONFIG_KERNEL_MODE_NEON)	+= arm/xor-neon.o arm/xor-neon-glue.o
+endif
+xor-$(CONFIG_ARM64)		+= arm64/xor-neon.o arm64/xor-neon-glue.o
+xor-$(CONFIG_CPU_HAS_LSX)	+= loongarch/xor_simd.o
+xor-$(CONFIG_CPU_HAS_LSX)	+= loongarch/xor_simd_glue.o
+xor-$(CONFIG_ALTIVEC)		+= powerpc/xor_vmx.o powerpc/xor_vmx_glue.o
+xor-$(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-$(CONFIG_S390)		+= s390/xor.o
+xor-$(CONFIG_X86_32)		+= x86/xor-avx.o x86/xor-sse.o x86/xor-mmx.o
+xor-$(CONFIG_X86_64)		+= x86/xor-avx.o x86/xor-sse.o
+obj-y				+= tests/
+
+CFLAGS_arm/xor-neon.o		+= $(CC_FLAGS_FPU)
+CFLAGS_REMOVE_arm/xor-neon.o	+= $(CC_FLAGS_NO_FPU)
+
+CFLAGS_arm64/xor-neon.o		+= $(CC_FLAGS_FPU)
+CFLAGS_REMOVE_arm64/xor-neon.o	+= $(CC_FLAGS_NO_FPU)
+
+CFLAGS_powerpc/xor_vmx.o	+= -mhard-float -maltivec \
+				   $(call cc-option,-mabi=altivec) \
+				   -isystem $(shell $(CC) -print-file-name=include)
diff --git a/lib/raid/xor/alpha/xor.c b/lib/raid/xor/alpha/xor.c
new file mode 100644
index 000000000..a8f72f2dd
--- /dev/null
+++ b/lib/raid/xor/alpha/xor.c
@@ -0,0 +1,848 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Optimized XOR parity functions for alpha EV5 and EV6
+ */
+#include "xor_impl.h"
+#include "xor_arch.h"
+
+extern void
+xor_alpha_2(unsigned long bytes, unsigned long * __restrict p1,
+	    const unsigned long * __restrict p2);
+extern void
+xor_alpha_3(unsigned long bytes, unsigned long * __restrict p1,
+	    const unsigned long * __restrict p2,
+	    const unsigned long * __restrict p3);
+extern void
+xor_alpha_4(unsigned long bytes, unsigned long * __restrict p1,
+	    const unsigned long * __restrict p2,
+	    const unsigned long * __restrict p3,
+	    const unsigned long * __restrict p4);
+extern void
+xor_alpha_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);
+
+extern void
+xor_alpha_prefetch_2(unsigned long bytes, unsigned long * __restrict p1,
+		     const unsigned long * __restrict p2);
+extern void
+xor_alpha_prefetch_3(unsigned long bytes, unsigned long * __restrict p1,
+		     const unsigned long * __restrict p2,
+		     const unsigned long * __restrict p3);
+extern void
+xor_alpha_prefetch_4(unsigned long bytes, unsigned long * __restrict p1,
+		     const unsigned long * __restrict p2,
+		     const unsigned long * __restrict p3,
+		     const unsigned long * __restrict p4);
+extern void
+xor_alpha_prefetch_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("								\n\
+	.text							\n\
+	.align 3						\n\
+	.ent xor_alpha_2					\n\
+xor_alpha_2:							\n\
+	.prologue 0						\n\
+	srl $16, 6, $16						\n\
+	.align 4						\n\
+2:								\n\
+	ldq $0,0($17)						\n\
+	ldq $1,0($18)						\n\
+	ldq $2,8($17)						\n\
+	ldq $3,8($18)						\n\
+								\n\
+	ldq $4,16($17)						\n\
+	ldq $5,16($18)						\n\
+	ldq $6,24($17)						\n\
+	ldq $7,24($18)						\n\
+								\n\
+	ldq $19,32($17)						\n\
+	ldq $20,32($18)						\n\
+	ldq $21,40($17)						\n\
+	ldq $22,40($18)						\n\
+								\n\
+	ldq $23,48($17)						\n\
+	ldq $24,48($18)						\n\
+	ldq $25,56($17)						\n\
+	xor $0,$1,$0		# 7 cycles from $1 load		\n\
+								\n\
+	ldq $27,56($18)						\n\
+	xor $2,$3,$2						\n\
+	stq $0,0($17)						\n\
+	xor $4,$5,$4						\n\
+								\n\
+	stq $2,8($17)						\n\
+	xor $6,$7,$6						\n\
+	stq $4,16($17)						\n\
+	xor $19,$20,$19						\n\
+								\n\
+	stq $6,24($17)						\n\
+	xor $21,$22,$21						\n\
+	stq $19,32($17)						\n\
+	xor $23,$24,$23						\n\
+								\n\
+	stq $21,40($17)						\n\
+	xor $25,$27,$25						\n\
+	stq $23,48($17)						\n\
+	subq $16,1,$16						\n\
+								\n\
+	stq $25,56($17)						\n\
+	addq $17,64,$17						\n\
+	addq $18,64,$18						\n\
+	bgt $16,2b						\n\
+								\n\
+	ret							\n\
+	.end xor_alpha_2					\n\
+								\n\
+	.align 3						\n\
+	.ent xor_alpha_3					\n\
+xor_alpha_3:							\n\
+	.prologue 0						\n\
+	srl $16, 6, $16						\n\
+	.align 4						\n\
+3:								\n\
+	ldq $0,0($17)						\n\
+	ldq $1,0($18)						\n\
+	ldq $2,0($19)						\n\
+	ldq $3,8($17)						\n\
+								\n\
+	ldq $4,8($18)						\n\
+	ldq $6,16($17)						\n\
+	ldq $7,16($18)						\n\
+	ldq $21,24($17)						\n\
+								\n\
+	ldq $22,24($18)						\n\
+	ldq $24,32($17)						\n\
+	ldq $25,32($18)						\n\
+	ldq $5,8($19)						\n\
+								\n\
+	ldq $20,16($19)						\n\
+	ldq $23,24($19)						\n\
+	ldq $27,32($19)						\n\
+	nop							\n\
+								\n\
+	xor $0,$1,$1		# 8 cycles from $0 load		\n\
+	xor $3,$4,$4		# 6 cycles from $4 load		\n\
+	xor $6,$7,$7		# 6 cycles from $7 load		\n\
+	xor $21,$22,$22		# 5 cycles from $22 load	\n\
+								\n\
+	xor $1,$2,$2		# 9 cycles from $2 load		\n\
+	xor $24,$25,$25		# 5 cycles from $25 load	\n\
+	stq $2,0($17)						\n\
+	xor $4,$5,$5		# 6 cycles from $5 load		\n\
+								\n\
+	stq $5,8($17)						\n\
+	xor $7,$20,$20		# 7 cycles from $20 load	\n\
+	stq $20,16($17)						\n\
+	xor $22,$23,$23		# 7 cycles from $23 load	\n\
+								\n\
+	stq $23,24($17)						\n\
+	xor $25,$27,$27		# 7 cycles from $27 load	\n\
+	stq $27,32($17)						\n\
+	nop							\n\
+								\n\
+	ldq $0,40($17)						\n\
+	ldq $1,40($18)						\n\
+	ldq $3,48($17)						\n\
+	ldq $4,48($18)						\n\
+								\n\
+	ldq $6,56($17)						\n\
+	ldq $7,56($18)						\n\
+	ldq $2,40($19)						\n\
+	ldq $5,48($19)						\n\
+								\n\
+	ldq $20,56($19)						\n\
+	xor $0,$1,$1		# 4 cycles from $1 load		\n\
+	xor $3,$4,$4		# 5 cycles from $4 load		\n\
+	xor $6,$7,$7		# 5 cycles from $7 load		\n\
+								\n\
+	xor $1,$2,$2		# 4 cycles from $2 load		\n\
+	xor $4,$5,$5		# 5 cycles from $5 load		\n\
+	stq $2,40($17)						\n\
+	xor $7,$20,$20		# 4 cycles from $20 load	\n\
+								\n\
+	stq $5,48($17)						\n\
+	subq $16,1,$16						\n\
+	stq $20,56($17)						\n\
+	addq $19,64,$19						\n\
+								\n\
+	addq $18,64,$18						\n\
+	addq $17,64,$17						\n\
+	bgt $16,3b						\n\
+	ret							\n\
+	.end xor_alpha_3					\n\
+								\n\
+	.align 3						\n\
+	.ent xor_alpha_4					\n\
+xor_alpha_4:							\n\
+	.prologue 0						\n\
+	srl $16, 6, $16						\n\
+	.align 4						\n\
+4:								\n\
+	ldq $0,0($17)						\n\
+	ldq $1,0($18)						\n\
+	ldq $2,0($19)						\n\
+	ldq $3,0($20)						\n\
+								\n\
+	ldq $4,8($17)						\n\
+	ldq $5,8($18)						\n\
+	ldq $6,8($19)						\n\
+	ldq $7,8($20)						\n\
+								\n\
+	ldq $21,16($17)						\n\
+	ldq $22,16($18)						\n\
+	ldq $23,16($19)						\n\
+	ldq $24,16($20)						\n\
+								\n\
+	ldq $25,24($17)						\n\
+	xor $0,$1,$1		# 6 cycles from $1 load		\n\
+	ldq $27,24($18)						\n\
+	xor $2,$3,$3		# 6 cycles from $3 load		\n\
+								\n\
+	ldq $0,24($19)						\n\
+	xor $1,$3,$3						\n\
+	ldq $1,24($20)						\n\
+	xor $4,$5,$5		# 7 cycles from $5 load		\n\
+								\n\
+	stq $3,0($17)						\n\
+	xor $6,$7,$7						\n\
+	xor $21,$22,$22		# 7 cycles from $22 load	\n\
+	xor $5,$7,$7						\n\
+								\n\
+	stq $7,8($17)						\n\
+	xor $23,$24,$24		# 7 cycles from $24 load	\n\
+	ldq $2,32($17)						\n\
+	xor $22,$24,$24						\n\
+								\n\
+	ldq $3,32($18)						\n\
+	ldq $4,32($19)						\n\
+	ldq $5,32($20)						\n\
+	xor $25,$27,$27		# 8 cycles from $27 load	\n\
+								\n\
+	ldq $6,40($17)						\n\
+	ldq $7,40($18)						\n\
+	ldq $21,40($19)						\n\
+	ldq $22,40($20)						\n\
+								\n\
+	stq $24,16($17)						\n\
+	xor $0,$1,$1		# 9 cycles from $1 load		\n\
+	xor $2,$3,$3		# 5 cycles from $3 load		\n\
+	xor $27,$1,$1						\n\
+								\n\
+	stq $1,24($17)						\n\
+	xor $4,$5,$5		# 5 cycles from $5 load		\n\
+	ldq $23,48($17)						\n\
+	ldq $24,48($18)						\n\
+								\n\
+	ldq $25,48($19)						\n\
+	xor $3,$5,$5						\n\
+	ldq $27,48($20)						\n\
+	ldq $0,56($17)						\n\
+								\n\
+	ldq $1,56($18)						\n\
+	ldq $2,56($19)						\n\
+	xor $6,$7,$7		# 8 cycles from $6 load		\n\
+	ldq $3,56($20)						\n\
+								\n\
+	stq $5,32($17)						\n\
+	xor $21,$22,$22		# 8 cycles from $22 load	\n\
+	xor $7,$22,$22						\n\
+	xor $23,$24,$24		# 5 cycles from $24 load	\n\
+								\n\
+	stq $22,40($17)						\n\
+	xor $25,$27,$27		# 5 cycles from $27 load	\n\
+	xor $24,$27,$27						\n\
+	xor $0,$1,$1		# 5 cycles from $1 load		\n\
+								\n\
+	stq $27,48($17)						\n\
+	xor $2,$3,$3		# 4 cycles from $3 load		\n\
+	xor $1,$3,$3						\n\
+	subq $16,1,$16						\n\
+								\n\
+	stq $3,56($17)						\n\
+	addq $20,64,$20						\n\
+	addq $19,64,$19						\n\
+	addq $18,64,$18						\n\
+								\n\
+	addq $17,64,$17						\n\
+	bgt $16,4b						\n\
+	ret							\n\
+	.end xor_alpha_4					\n\
+								\n\
+	.align 3						\n\
+	.ent xor_alpha_5					\n\
+xor_alpha_5:							\n\
+	.prologue 0						\n\
+	srl $16, 6, $16						\n\
+	.align 4						\n\
+5:								\n\
+	ldq $0,0($17)						\n\
+	ldq $1,0($18)						\n\
+	ldq $2,0($19)						\n\
+	ldq $3,0($20)						\n\
+								\n\
+	ldq $4,0($21)						\n\
+	ldq $5,8($17)						\n\
+	ldq $6,8($18)						\n\
+	ldq $7,8($19)						\n\
+								\n\
+	ldq $22,8($20)						\n\
+	ldq $23,8($21)						\n\
+	ldq $24,16($17)						\n\
+	ldq $25,16($18)						\n\
+								\n\
+	ldq $27,16($19)						\n\
+	xor $0,$1,$1		# 6 cycles from $1 load		\n\
+	ldq $28,16($20)						\n\
+	xor $2,$3,$3		# 6 cycles from $3 load		\n\
+								\n\
+	ldq $0,16($21)						\n\
+	xor $1,$3,$3						\n\
+	ldq $1,24($17)						\n\
+	xor $3,$4,$4		# 7 cycles from $4 load		\n\
+								\n\
+	stq $4,0($17)						\n\
+	xor $5,$6,$6		# 7 cycles from $6 load		\n\
+	xor $7,$22,$22		# 7 cycles from $22 load	\n\
+	xor $6,$23,$23		# 7 cycles from $23 load	\n\
+								\n\
+	ldq $2,24($18)						\n\
+	xor $22,$23,$23						\n\
+	ldq $3,24($19)						\n\
+	xor $24,$25,$25		# 8 cycles from $25 load	\n\
+								\n\
+	stq $23,8($17)						\n\
+	xor $25,$27,$27		# 8 cycles from $27 load	\n\
+	ldq $4,24($20)						\n\
+	xor $28,$0,$0		# 7 cycles from $0 load		\n\
+								\n\
+	ldq $5,24($21)						\n\
+	xor $27,$0,$0						\n\
+	ldq $6,32($17)						\n\
+	ldq $7,32($18)						\n\
+								\n\
+	stq $0,16($17)						\n\
+	xor $1,$2,$2		# 6 cycles from $2 load		\n\
+	ldq $22,32($19)						\n\
+	xor $3,$4,$4		# 4 cycles from $4 load		\n\
+								\n\
+	ldq $23,32($20)						\n\
+	xor $2,$4,$4						\n\
+	ldq $24,32($21)						\n\
+	ldq $25,40($17)						\n\
+								\n\
+	ldq $27,40($18)						\n\
+	ldq $28,40($19)						\n\
+	ldq $0,40($20)						\n\
+	xor $4,$5,$5		# 7 cycles from $5 load		\n\
+								\n\
+	stq $5,24($17)						\n\
+	xor $6,$7,$7		# 7 cycles from $7 load		\n\
+	ldq $1,40($21)						\n\
+	ldq $2,48($17)						\n\
+								\n\
+	ldq $3,48($18)						\n\
+	xor $7,$22,$22		# 7 cycles from $22 load	\n\
+	ldq $4,48($19)						\n\
+	xor $23,$24,$24		# 6 cycles from $24 load	\n\
+								\n\
+	ldq $5,48($20)						\n\
+	xor $22,$24,$24						\n\
+	ldq $6,48($21)						\n\
+	xor $25,$27,$27		# 7 cycles from $27 load	\n\
+								\n\
+	stq $24,32($17)						\n\
+	xor $27,$28,$28		# 8 cycles from $28 load	\n\
+	ldq $7,56($17)						\n\
+	xor $0,$1,$1		# 6 cycles from $1 load		\n\
+								\n\
+	ldq $22,56($18)						\n\
+	ldq $23,56($19)						\n\
+	ldq $24,56($20)						\n\
+	ldq $25,56($21)						\n\
+								\n\
+	xor $28,$1,$1						\n\
+	xor $2,$3,$3		# 9 cycles from $3 load		\n\
+	xor $3,$4,$4		# 9 cycles from $4 load		\n\
+	xor $5,$6,$6		# 8 cycles from $6 load		\n\
+								\n\
+	stq $1,40($17)						\n\
+	xor $4,$6,$6						\n\
+	xor $7,$22,$22		# 7 cycles from $22 load	\n\
+	xor $23,$24,$24		# 6 cycles from $24 load	\n\
+								\n\
+	stq $6,48($17)						\n\
+	xor $22,$24,$24						\n\
+	subq $16,1,$16						\n\
+	xor $24,$25,$25		# 8 cycles from $25 load	\n\
+								\n\
+	stq $25,56($17)						\n\
+	addq $21,64,$21						\n\
+	addq $20,64,$20						\n\
+	addq $19,64,$19						\n\
+								\n\
+	addq $18,64,$18						\n\
+	addq $17,64,$17						\n\
+	bgt $16,5b						\n\
+	ret							\n\
+	.end xor_alpha_5					\n\
+								\n\
+	.align 3						\n\
+	.ent xor_alpha_prefetch_2				\n\
+xor_alpha_prefetch_2:						\n\
+	.prologue 0						\n\
+	srl $16, 6, $16						\n\
+								\n\
+	ldq $31, 0($17)						\n\
+	ldq $31, 0($18)						\n\
+								\n\
+	ldq $31, 64($17)					\n\
+	ldq $31, 64($18)					\n\
+								\n\
+	ldq $31, 128($17)					\n\
+	ldq $31, 128($18)					\n\
+								\n\
+	ldq $31, 192($17)					\n\
+	ldq $31, 192($18)					\n\
+	.align 4						\n\
+2:								\n\
+	ldq $0,0($17)						\n\
+	ldq $1,0($18)						\n\
+	ldq $2,8($17)						\n\
+	ldq $3,8($18)						\n\
+								\n\
+	ldq $4,16($17)						\n\
+	ldq $5,16($18)						\n\
+	ldq $6,24($17)						\n\
+	ldq $7,24($18)						\n\
+								\n\
+	ldq $19,32($17)						\n\
+	ldq $20,32($18)						\n\
+	ldq $21,40($17)						\n\
+	ldq $22,40($18)						\n\
+								\n\
+	ldq $23,48($17)						\n\
+	ldq $24,48($18)						\n\
+	ldq $25,56($17)						\n\
+	ldq $27,56($18)						\n\
+								\n\
+	ldq $31,256($17)					\n\
+	xor $0,$1,$0		# 8 cycles from $1 load		\n\
+	ldq $31,256($18)					\n\
+	xor $2,$3,$2						\n\
+								\n\
+	stq $0,0($17)						\n\
+	xor $4,$5,$4						\n\
+	stq $2,8($17)						\n\
+	xor $6,$7,$6						\n\
+								\n\
+	stq $4,16($17)						\n\
+	xor $19,$20,$19						\n\
+	stq $6,24($17)						\n\
+	xor $21,$22,$21						\n\
+								\n\
+	stq $19,32($17)						\n\
+	xor $23,$24,$23						\n\
+	stq $21,40($17)						\n\
+	xor $25,$27,$25						\n\
+								\n\
+	stq $23,48($17)						\n\
+	subq $16,1,$16						\n\
+	stq $25,56($17)						\n\
+	addq $17,64,$17						\n\
+								\n\
+	addq $18,64,$18						\n\
+	bgt $16,2b						\n\
+	ret							\n\
+	.end xor_alpha_prefetch_2				\n\
+								\n\
+	.align 3						\n\
+	.ent xor_alpha_prefetch_3				\n\
+xor_alpha_prefetch_3:						\n\
+	.prologue 0						\n\
+	srl $16, 6, $16						\n\
+								\n\
+	ldq $31, 0($17)						\n\
+	ldq $31, 0($18)						\n\
+	ldq $31, 0($19)						\n\
+								\n\
+	ldq $31, 64($17)					\n\
+	ldq $31, 64($18)					\n\
+	ldq $31, 64($19)					\n\
+								\n\
+	ldq $31, 128($17)					\n\
+	ldq $31, 128($18)					\n\
+	ldq $31, 128($19)					\n\
+								\n\
+	ldq $31, 192($17)					\n\
+	ldq $31, 192($18)					\n\
+	ldq $31, 192($19)					\n\
+	.align 4						\n\
+3:								\n\
+	ldq $0,0($17)						\n\
+	ldq $1,0($18)						\n\
+	ldq $2,0($19)						\n\
+	ldq $3,8($17)						\n\
+								\n\
+	ldq $4,8($18)						\n\
+	ldq $6,16($17)						\n\
+	ldq $7,16($18)						\n\
+	ldq $21,24($17)						\n\
+								\n\
+	ldq $22,24($18)						\n\
+	ldq $24,32($17)						\n\
+	ldq $25,32($18)						\n\
+	ldq $5,8($19)						\n\
+								\n\
+	ldq $20,16($19)						\n\
+	ldq $23,24($19)						\n\
+	ldq $27,32($19)						\n\
+	nop							\n\
+								\n\
+	xor $0,$1,$1		# 8 cycles from $0 load		\n\
+	xor $3,$4,$4		# 7 cycles from $4 load		\n\
+	xor $6,$7,$7		# 6 cycles from $7 load		\n\
+	xor $21,$22,$22		# 5 cycles from $22 load	\n\
+								\n\
+	xor $1,$2,$2		# 9 cycles from $2 load		\n\
+	xor $24,$25,$25		# 5 cycles from $25 load	\n\
+	stq $2,0($17)						\n\
+	xor $4,$5,$5		# 6 cycles from $5 load		\n\
+								\n\
+	stq $5,8($17)						\n\
+	xor $7,$20,$20		# 7 cycles from $20 load	\n\
+	stq $20,16($17)						\n\
+	xor $22,$23,$23		# 7 cycles from $23 load	\n\
+								\n\
+	stq $23,24($17)						\n\
+	xor $25,$27,$27		# 7 cycles from $27 load	\n\
+	stq $27,32($17)						\n\
+	nop							\n\
+								\n\
+	ldq $0,40($17)						\n\
+	ldq $1,40($18)						\n\
+	ldq $3,48($17)						\n\
+	ldq $4,48($18)						\n\
+								\n\
+	ldq $6,56($17)						\n\
+	ldq $7,56($18)						\n\
+	ldq $2,40($19)						\n\
+	ldq $5,48($19)						\n\
+								\n\
+	ldq $20,56($19)						\n\
+	ldq $31,256($17)					\n\
+	ldq $31,256($18)					\n\
+	ldq $31,256($19)					\n\
+								\n\
+	xor $0,$1,$1		# 6 cycles from $1 load		\n\
+	xor $3,$4,$4		# 5 cycles from $4 load		\n\
+	xor $6,$7,$7		# 5 cycles from $7 load		\n\
+	xor $1,$2,$2		# 4 cycles from $2 load		\n\
+								\n\
+	xor $4,$5,$5		# 5 cycles from $5 load		\n\
+	xor $7,$20,$20		# 4 cycles from $20 load	\n\
+	stq $2,40($17)						\n\
+	subq $16,1,$16						\n\
+								\n\
+	stq $5,48($17)						\n\
+	addq $19,64,$19						\n\
+	stq $20,56($17)						\n\
+	addq $18,64,$18						\n\
+								\n\
+	addq $17,64,$17						\n\
+	bgt $16,3b						\n\
+	ret							\n\
+	.end xor_alpha_prefetch_3				\n\
+								\n\
+	.align 3						\n\
+	.ent xor_alpha_prefetch_4				\n\
+xor_alpha_prefetch_4:						\n\
+	.prologue 0						\n\
+	srl $16, 6, $16						\n\
+								\n\
+	ldq $31, 0($17)						\n\
+	ldq $31, 0($18)						\n\
+	ldq $31, 0($19)						\n\
+	ldq $31, 0($20)						\n\
+								\n\
+	ldq $31, 64($17)					\n\
+	ldq $31, 64($18)					\n\
+	ldq $31, 64($19)					\n\
+	ldq $31, 64($20)					\n\
+								\n\
+	ldq $31, 128($17)					\n\
+	ldq $31, 128($18)					\n\
+	ldq $31, 128($19)					\n\
+	ldq $31, 128($20)					\n\
+								\n\
+	ldq $31, 192($17)					\n\
+	ldq $31, 192($18)					\n\
+	ldq $31, 192($19)					\n\
+	ldq $31, 192($20)					\n\
+	.align 4						\n\
+4:								\n\
+	ldq $0,0($17)						\n\
+	ldq $1,0($18)						\n\
+	ldq $2,0($19)						\n\
+	ldq $3,0($20)						\n\
+								\n\
+	ldq $4,8($17)						\n\
+	ldq $5,8($18)						\n\
+	ldq $6,8($19)						\n\
+	ldq $7,8($20)						\n\
+								\n\
+	ldq $21,16($17)						\n\
+	ldq $22,16($18)						\n\
+	ldq $23,16($19)						\n\
+	ldq $24,16($20)						\n\
+								\n\
+	ldq $25,24($17)						\n\
+	xor $0,$1,$1		# 6 cycles from $1 load		\n\
+	ldq $27,24($18)						\n\
+	xor $2,$3,$3		# 6 cycles from $3 load		\n\
+								\n\
+	ldq $0,24($19)						\n\
+	xor $1,$3,$3						\n\
+	ldq $1,24($20)						\n\
+	xor $4,$5,$5		# 7 cycles from $5 load		\n\
+								\n\
+	stq $3,0($17)						\n\
+	xor $6,$7,$7						\n\
+	xor $21,$22,$22		# 7 cycles from $22 load	\n\
+	xor $5,$7,$7						\n\
+								\n\
+	stq $7,8($17)						\n\
+	xor $23,$24,$24		# 7 cycles from $24 load	\n\
+	ldq $2,32($17)						\n\
+	xor $22,$24,$24						\n\
+								\n\
+	ldq $3,32($18)						\n\
+	ldq $4,32($19)						\n\
+	ldq $5,32($20)						\n\
+	xor $25,$27,$27		# 8 cycles from $27 load	\n\
+								\n\
+	ldq $6,40($17)						\n\
+	ldq $7,40($18)						\n\
+	ldq $21,40($19)						\n\
+	ldq $22,40($20)						\n\
+								\n\
+	stq $24,16($17)						\n\
+	xor $0,$1,$1		# 9 cycles from $1 load		\n\
+	xor $2,$3,$3		# 5 cycles from $3 load		\n\
+	xor $27,$1,$1						\n\
+								\n\
+	stq $1,24($17)						\n\
+	xor $4,$5,$5		# 5 cycles from $5 load		\n\
+	ldq $23,48($17)						\n\
+	xor $3,$5,$5						\n\
+								\n\
+	ldq $24,48($18)						\n\
+	ldq $25,48($19)						\n\
+	ldq $27,48($20)						\n\
+	ldq $0,56($17)						\n\
+								\n\
+	ldq $1,56($18)						\n\
+	ldq $2,56($19)						\n\
+	ldq $3,56($20)						\n\
+	xor $6,$7,$7		# 8 cycles from $6 load		\n\
+								\n\
+	ldq $31,256($17)					\n\
+	xor $21,$22,$22		# 8 cycles from $22 load	\n\
+	ldq $31,256($18)					\n\
+	xor $7,$22,$22						\n\
+								\n\
+	ldq $31,256($19)					\n\
+	xor $23,$24,$24		# 6 cycles from $24 load	\n\
+	ldq $31,256($20)					\n\
+	xor $25,$27,$27		# 6 cycles from $27 load	\n\
+								\n\
+	stq $5,32($17)						\n\
+	xor $24,$27,$27						\n\
+	xor $0,$1,$1		# 7 cycles from $1 load		\n\
+	xor $2,$3,$3		# 6 cycles from $3 load		\n\
+								\n\
+	stq $22,40($17)						\n\
+	xor $1,$3,$3						\n\
+	stq $27,48($17)						\n\
+	subq $16,1,$16						\n\
+								\n\
+	stq $3,56($17)						\n\
+	addq $20,64,$20						\n\
+	addq $19,64,$19						\n\
+	addq $18,64,$18						\n\
+								\n\
+	addq $17,64,$17						\n\
+	bgt $16,4b						\n\
+	ret							\n\
+	.end xor_alpha_prefetch_4				\n\
+								\n\
+	.align 3						\n\
+	.ent xor_alpha_prefetch_5				\n\
+xor_alpha_prefetch_5:						\n\
+	.prologue 0						\n\
+	srl $16, 6, $16						\n\
+								\n\
+	ldq $31, 0($17)						\n\
+	ldq $31, 0($18)						\n\
+	ldq $31, 0($19)						\n\
+	ldq $31, 0($20)						\n\
+	ldq $31, 0($21)						\n\
+								\n\
+	ldq $31, 64($17)					\n\
+	ldq $31, 64($18)					\n\
+	ldq $31, 64($19)					\n\
+	ldq $31, 64($20)					\n\
+	ldq $31, 64($21)					\n\
+								\n\
+	ldq $31, 128($17)					\n\
+	ldq $31, 128($18)					\n\
+	ldq $31, 128($19)					\n\
+	ldq $31, 128($20)					\n\
+	ldq $31, 128($21)					\n\
+								\n\
+	ldq $31, 192($17)					\n\
+	ldq $31, 192($18)					\n\
+	ldq $31, 192($19)					\n\
+	ldq $31, 192($20)					\n\
+	ldq $31, 192($21)					\n\
+	.align 4						\n\
+5:								\n\
+	ldq $0,0($17)						\n\
+	ldq $1,0($18)						\n\
+	ldq $2,0($19)						\n\
+	ldq $3,0($20)						\n\
+								\n\
+	ldq $4,0($21)						\n\
+	ldq $5,8($17)						\n\
+	ldq $6,8($18)						\n\
+	ldq $7,8($19)						\n\
+								\n\
+	ldq $22,8($20)						\n\
+	ldq $23,8($21)						\n\
+	ldq $24,16($17)						\n\
+	ldq $25,16($18)						\n\
+								\n\
+	ldq $27,16($19)						\n\
+	xor $0,$1,$1		# 6 cycles from $1 load		\n\
+	ldq $28,16($20)						\n\
+	xor $2,$3,$3		# 6 cycles from $3 load		\n\
+								\n\
+	ldq $0,16($21)						\n\
+	xor $1,$3,$3						\n\
+	ldq $1,24($17)						\n\
+	xor $3,$4,$4		# 7 cycles from $4 load		\n\
+								\n\
+	stq $4,0($17)						\n\
+	xor $5,$6,$6		# 7 cycles from $6 load		\n\
+	xor $7,$22,$22		# 7 cycles from $22 load	\n\
+	xor $6,$23,$23		# 7 cycles from $23 load	\n\
+								\n\
+	ldq $2,24($18)						\n\
+	xor $22,$23,$23						\n\
+	ldq $3,24($19)						\n\
+	xor $24,$25,$25		# 8 cycles from $25 load	\n\
+								\n\
+	stq $23,8($17)						\n\
+	xor $25,$27,$27		# 8 cycles from $27 load	\n\
+	ldq $4,24($20)						\n\
+	xor $28,$0,$0		# 7 cycles from $0 load		\n\
+								\n\
+	ldq $5,24($21)						\n\
+	xor $27,$0,$0						\n\
+	ldq $6,32($17)						\n\
+	ldq $7,32($18)						\n\
+								\n\
+	stq $0,16($17)						\n\
+	xor $1,$2,$2		# 6 cycles from $2 load		\n\
+	ldq $22,32($19)						\n\
+	xor $3,$4,$4		# 4 cycles from $4 load		\n\
+								\n\
+	ldq $23,32($20)						\n\
+	xor $2,$4,$4						\n\
+	ldq $24,32($21)						\n\
+	ldq $25,40($17)						\n\
+								\n\
+	ldq $27,40($18)						\n\
+	ldq $28,40($19)						\n\
+	ldq $0,40($20)						\n\
+	xor $4,$5,$5		# 7 cycles from $5 load		\n\
+								\n\
+	stq $5,24($17)						\n\
+	xor $6,$7,$7		# 7 cycles from $7 load		\n\
+	ldq $1,40($21)						\n\
+	ldq $2,48($17)						\n\
+								\n\
+	ldq $3,48($18)						\n\
+	xor $7,$22,$22		# 7 cycles from $22 load	\n\
+	ldq $4,48($19)						\n\
+	xor $23,$24,$24		# 6 cycles from $24 load	\n\
+								\n\
+	ldq $5,48($20)						\n\
+	xor $22,$24,$24						\n\
+	ldq $6,48($21)						\n\
+	xor $25,$27,$27		# 7 cycles from $27 load	\n\
+								\n\
+	stq $24,32($17)						\n\
+	xor $27,$28,$28		# 8 cycles from $28 load	\n\
+	ldq $7,56($17)						\n\
+	xor $0,$1,$1		# 6 cycles from $1 load		\n\
+								\n\
+	ldq $22,56($18)						\n\
+	ldq $23,56($19)						\n\
+	ldq $24,56($20)						\n\
+	ldq $25,56($21)						\n\
+								\n\
+	ldq $31,256($17)					\n\
+	xor $28,$1,$1						\n\
+	ldq $31,256($18)					\n\
+	xor $2,$3,$3		# 9 cycles from $3 load		\n\
+								\n\
+	ldq $31,256($19)					\n\
+	xor $3,$4,$4		# 9 cycles from $4 load		\n\
+	ldq $31,256($20)					\n\
+	xor $5,$6,$6		# 8 cycles from $6 load		\n\
+								\n\
+	stq $1,40($17)						\n\
+	xor $4,$6,$6						\n\
+	xor $7,$22,$22		# 7 cycles from $22 load	\n\
+	xor $23,$24,$24		# 6 cycles from $24 load	\n\
+								\n\
+	stq $6,48($17)						\n\
+	xor $22,$24,$24						\n\
+	ldq $31,256($21)					\n\
+	xor $24,$25,$25		# 8 cycles from $25 load	\n\
+								\n\
+	stq $25,56($17)						\n\
+	subq $16,1,$16						\n\
+	addq $21,64,$21						\n\
+	addq $20,64,$20						\n\
+								\n\
+	addq $19,64,$19						\n\
+	addq $18,64,$18						\n\
+	addq $17,64,$17						\n\
+	bgt $16,5b						\n\
+								\n\
+	ret							\n\
+	.end xor_alpha_prefetch_5				\n\
+");
+
+DO_XOR_BLOCKS(alpha, xor_alpha_2, xor_alpha_3, xor_alpha_4, xor_alpha_5);
+
+struct xor_block_template xor_block_alpha = {
+	.name		= "alpha",
+	.xor_gen	= xor_gen_alpha,
+};
+
+DO_XOR_BLOCKS(alpha_prefetch, xor_alpha_prefetch_2, xor_alpha_prefetch_3,
+		xor_alpha_prefetch_4, xor_alpha_prefetch_5);
+
+struct xor_block_template xor_block_alpha_prefetch = {
+	.name		= "alpha prefetch",
+	.xor_gen	= xor_gen_alpha_prefetch,
+};
diff --git a/lib/raid/xor/alpha/xor_arch.h b/lib/raid/xor/alpha/xor_arch.h
new file mode 100644
index 000000000..0dcfea578
--- /dev/null
+++ b/lib/raid/xor/alpha/xor_arch.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <asm/special_insns.h>
+
+extern struct xor_block_template xor_block_alpha;
+extern struct xor_block_template xor_block_alpha_prefetch;
+
+/*
+ * Force the use of alpha_prefetch if EV6, as it is significantly faster in the
+ * cold cache case.
+ */
+static __always_inline void __init arch_xor_init(void)
+{
+	if (implver() == IMPLVER_EV6) {
+		xor_force(&xor_block_alpha_prefetch);
+	} else {
+		xor_register(&xor_block_8regs);
+		xor_register(&xor_block_32regs);
+		xor_register(&xor_block_alpha);
+		xor_register(&xor_block_alpha_prefetch);
+	}
+}
diff --git a/lib/raid/xor/arm/xor-neon-glue.c b/lib/raid/xor/arm/xor-neon-glue.c
new file mode 100644
index 000000000..cea39e019
--- /dev/null
+++ b/lib/raid/xor/arm/xor-neon-glue.c
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 2001 Russell King
+ */
+#include "xor_impl.h"
+#include "xor_arch.h"
+
+static void xor_gen_neon(void *dest, void **srcs, unsigned int src_cnt,
+		unsigned int bytes)
+{
+	kernel_neon_begin();
+	xor_gen_neon_inner(dest, srcs, src_cnt, bytes);
+	kernel_neon_end();
+}
+
+struct xor_block_template xor_block_neon = {
+	.name		= "neon",
+	.xor_gen	= xor_gen_neon,
+};
diff --git a/lib/raid/xor/arm/xor-neon.c b/lib/raid/xor/arm/xor-neon.c
new file mode 100644
index 000000000..23147e3a7
--- /dev/null
+++ b/lib/raid/xor/arm/xor-neon.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org>
+ */
+
+#include "xor_impl.h"
+#include "xor_arch.h"
+
+#ifndef __ARM_NEON__
+#error You should compile this file with '-march=armv7-a -mfloat-abi=softfp -mfpu=neon'
+#endif
+
+/*
+ * Pull in the reference implementations while instructing GCC (through
+ * -ftree-vectorize) to attempt to exploit implicit parallelism and emit
+ * NEON instructions. Clang does this by default at O2 so no pragma is
+ * needed.
+ */
+#ifdef CONFIG_CC_IS_GCC
+#pragma GCC optimize "tree-vectorize"
+#endif
+
+#define NO_TEMPLATE
+#include "../xor-8regs.c"
+
+__DO_XOR_BLOCKS(neon_inner, xor_8regs_2, xor_8regs_3, xor_8regs_4, xor_8regs_5);
diff --git a/lib/raid/xor/arm/xor.c b/lib/raid/xor/arm/xor.c
new file mode 100644
index 000000000..45139b6c5
--- /dev/null
+++ b/lib/raid/xor/arm/xor.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 2001 Russell King
+ */
+#include "xor_impl.h"
+#include "xor_arch.h"
+
+#define __XOR(a1, a2) a1 ^= a2
+
+#define GET_BLOCK_2(dst) \
+	__asm__("ldmia	%0, {%1, %2}" \
+		: "=r" (dst), "=r" (a1), "=r" (a2) \
+		: "0" (dst))
+
+#define GET_BLOCK_4(dst) \
+	__asm__("ldmia	%0, {%1, %2, %3, %4}" \
+		: "=r" (dst), "=r" (a1), "=r" (a2), "=r" (a3), "=r" (a4) \
+		: "0" (dst))
+
+#define XOR_BLOCK_2(src) \
+	__asm__("ldmia	%0!, {%1, %2}" \
+		: "=r" (src), "=r" (b1), "=r" (b2) \
+		: "0" (src)); \
+	__XOR(a1, b1); __XOR(a2, b2);
+
+#define XOR_BLOCK_4(src) \
+	__asm__("ldmia	%0!, {%1, %2, %3, %4}" \
+		: "=r" (src), "=r" (b1), "=r" (b2), "=r" (b3), "=r" (b4) \
+		: "0" (src)); \
+	__XOR(a1, b1); __XOR(a2, b2); __XOR(a3, b3); __XOR(a4, b4)
+
+#define PUT_BLOCK_2(dst) \
+	__asm__ __volatile__("stmia	%0!, {%2, %3}" \
+		: "=r" (dst) \
+		: "0" (dst), "r" (a1), "r" (a2))
+
+#define PUT_BLOCK_4(dst) \
+	__asm__ __volatile__("stmia	%0!, {%2, %3, %4, %5}" \
+		: "=r" (dst) \
+		: "0" (dst), "r" (a1), "r" (a2), "r" (a3), "r" (a4))
+
+static void
+xor_arm4regs_2(unsigned long bytes, unsigned long * __restrict p1,
+	       const unsigned long * __restrict p2)
+{
+	unsigned int lines = bytes / sizeof(unsigned long) / 4;
+	register unsigned int a1 __asm__("r4");
+	register unsigned int a2 __asm__("r5");
+	register unsigned int a3 __asm__("r6");
+	register unsigned int a4 __asm__("r10");
+	register unsigned int b1 __asm__("r8");
+	register unsigned int b2 __asm__("r9");
+	register unsigned int b3 __asm__("ip");
+	register unsigned int b4 __asm__("lr");
+
+	do {
+		GET_BLOCK_4(p1);
+		XOR_BLOCK_4(p2);
+		PUT_BLOCK_4(p1);
+	} while (--lines);
+}
+
+static void
+xor_arm4regs_3(unsigned long bytes, unsigned long * __restrict p1,
+	       const unsigned long * __restrict p2,
+	       const unsigned long * __restrict p3)
+{
+	unsigned int lines = bytes / sizeof(unsigned long) / 4;
+	register unsigned int a1 __asm__("r4");
+	register unsigned int a2 __asm__("r5");
+	register unsigned int a3 __asm__("r6");
+	register unsigned int a4 __asm__("r10");
+	register unsigned int b1 __asm__("r8");
+	register unsigned int b2 __asm__("r9");
+	register unsigned int b3 __asm__("ip");
+	register unsigned int b4 __asm__("lr");
+
+	do {
+		GET_BLOCK_4(p1);
+		XOR_BLOCK_4(p2);
+		XOR_BLOCK_4(p3);
+		PUT_BLOCK_4(p1);
+	} while (--lines);
+}
+
+static void
+xor_arm4regs_4(unsigned long bytes, unsigned long * __restrict p1,
+	       const unsigned long * __restrict p2,
+	       const unsigned long * __restrict p3,
+	       const unsigned long * __restrict p4)
+{
+	unsigned int lines = bytes / sizeof(unsigned long) / 2;
+	register unsigned int a1 __asm__("r8");
+	register unsigned int a2 __asm__("r9");
+	register unsigned int b1 __asm__("ip");
+	register unsigned int b2 __asm__("lr");
+
+	do {
+		GET_BLOCK_2(p1);
+		XOR_BLOCK_2(p2);
+		XOR_BLOCK_2(p3);
+		XOR_BLOCK_2(p4);
+		PUT_BLOCK_2(p1);
+	} while (--lines);
+}
+
+static void
+xor_arm4regs_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)
+{
+	unsigned int lines = bytes / sizeof(unsigned long) / 2;
+	register unsigned int a1 __asm__("r8");
+	register unsigned int a2 __asm__("r9");
+	register unsigned int b1 __asm__("ip");
+	register unsigned int b2 __asm__("lr");
+
+	do {
+		GET_BLOCK_2(p1);
+		XOR_BLOCK_2(p2);
+		XOR_BLOCK_2(p3);
+		XOR_BLOCK_2(p4);
+		XOR_BLOCK_2(p5);
+		PUT_BLOCK_2(p1);
+	} while (--lines);
+}
+
+DO_XOR_BLOCKS(arm4regs, xor_arm4regs_2, xor_arm4regs_3, xor_arm4regs_4,
+		xor_arm4regs_5);
+
+struct xor_block_template xor_block_arm4regs = {
+	.name		= "arm4regs",
+	.xor_gen	= xor_gen_arm4regs,
+};
diff --git a/lib/raid/xor/arm/xor_arch.h b/lib/raid/xor/arm/xor_arch.h
new file mode 100644
index 000000000..775ff835d
--- /dev/null
+++ b/lib/raid/xor/arm/xor_arch.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  Copyright (C) 2001 Russell King
+ */
+#include <asm/neon.h>
+
+extern struct xor_block_template xor_block_arm4regs;
+extern struct xor_block_template xor_block_neon;
+
+void xor_gen_neon_inner(void *dest, void **srcs, unsigned int src_cnt,
+		unsigned int bytes);
+
+static __always_inline void __init arch_xor_init(void)
+{
+	xor_register(&xor_block_arm4regs);
+	xor_register(&xor_block_8regs);
+	xor_register(&xor_block_32regs);
+#ifdef CONFIG_KERNEL_MODE_NEON
+	if (cpu_has_neon())
+		xor_register(&xor_block_neon);
+#endif
+}
diff --git a/lib/raid/xor/arm64/xor-neon-glue.c b/lib/raid/xor/arm64/xor-neon-glue.c
new file mode 100644
index 000000000..f0284f86f
--- /dev/null
+++ b/lib/raid/xor/arm64/xor-neon-glue.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Authors: Jackie Liu <liuyun01@kylinos.cn>
+ * Copyright (C) 2018,Tianjin KYLIN Information Technology Co., Ltd.
+ */
+
+#include <asm/simd.h>
+#include "xor_impl.h"
+#include "xor_arch.h"
+#include "xor-neon.h"
+
+#define XOR_TEMPLATE(_name)						\
+static void xor_gen_##_name(void *dest, void **srcs, unsigned int src_cnt, \
+		unsigned int bytes)					\
+{									\
+	scoped_ksimd()							\
+		xor_gen_##_name##_inner(dest, srcs, src_cnt, bytes);	\
+}									\
+									\
+struct xor_block_template xor_block_##_name = {				\
+	.name   	= __stringify(_name),				\
+	.xor_gen	= xor_gen_##_name,				\
+};
+
+XOR_TEMPLATE(neon);
+XOR_TEMPLATE(eor3);
diff --git a/lib/raid/xor/arm64/xor-neon.c b/lib/raid/xor/arm64/xor-neon.c
new file mode 100644
index 000000000..97ef3cb92
--- /dev/null
+++ b/lib/raid/xor/arm64/xor-neon.c
@@ -0,0 +1,312 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Authors: Jackie Liu <liuyun01@kylinos.cn>
+ * Copyright (C) 2018,Tianjin KYLIN Information Technology Co., Ltd.
+ */
+
+#include <linux/cache.h>
+#include <asm/neon-intrinsics.h>
+#include "xor_impl.h"
+#include "xor_arch.h"
+#include "xor-neon.h"
+
+static void __xor_neon_2(unsigned long bytes, unsigned long * __restrict p1,
+		const unsigned long * __restrict p2)
+{
+	uint64_t *dp1 = (uint64_t *)p1;
+	uint64_t *dp2 = (uint64_t *)p2;
+
+	register uint64x2_t v0, v1, v2, v3;
+	long lines = bytes / (sizeof(uint64x2_t) * 4);
+
+	do {
+		/* p1 ^= p2 */
+		v0 = veorq_u64(vld1q_u64(dp1 +  0), vld1q_u64(dp2 +  0));
+		v1 = veorq_u64(vld1q_u64(dp1 +  2), vld1q_u64(dp2 +  2));
+		v2 = veorq_u64(vld1q_u64(dp1 +  4), vld1q_u64(dp2 +  4));
+		v3 = veorq_u64(vld1q_u64(dp1 +  6), vld1q_u64(dp2 +  6));
+
+		/* store */
+		vst1q_u64(dp1 +  0, v0);
+		vst1q_u64(dp1 +  2, v1);
+		vst1q_u64(dp1 +  4, v2);
+		vst1q_u64(dp1 +  6, v3);
+
+		dp1 += 8;
+		dp2 += 8;
+	} while (--lines > 0);
+}
+
+static void __xor_neon_3(unsigned long bytes, unsigned long * __restrict p1,
+		const unsigned long * __restrict p2,
+		const unsigned long * __restrict p3)
+{
+	uint64_t *dp1 = (uint64_t *)p1;
+	uint64_t *dp2 = (uint64_t *)p2;
+	uint64_t *dp3 = (uint64_t *)p3;
+
+	register uint64x2_t v0, v1, v2, v3;
+	long lines = bytes / (sizeof(uint64x2_t) * 4);
+
+	do {
+		/* p1 ^= p2 */
+		v0 = veorq_u64(vld1q_u64(dp1 +  0), vld1q_u64(dp2 +  0));
+		v1 = veorq_u64(vld1q_u64(dp1 +  2), vld1q_u64(dp2 +  2));
+		v2 = veorq_u64(vld1q_u64(dp1 +  4), vld1q_u64(dp2 +  4));
+		v3 = veorq_u64(vld1q_u64(dp1 +  6), vld1q_u64(dp2 +  6));
+
+		/* p1 ^= p3 */
+		v0 = veorq_u64(v0, vld1q_u64(dp3 +  0));
+		v1 = veorq_u64(v1, vld1q_u64(dp3 +  2));
+		v2 = veorq_u64(v2, vld1q_u64(dp3 +  4));
+		v3 = veorq_u64(v3, vld1q_u64(dp3 +  6));
+
+		/* store */
+		vst1q_u64(dp1 +  0, v0);
+		vst1q_u64(dp1 +  2, v1);
+		vst1q_u64(dp1 +  4, v2);
+		vst1q_u64(dp1 +  6, v3);
+
+		dp1 += 8;
+		dp2 += 8;
+		dp3 += 8;
+	} while (--lines > 0);
+}
+
+static void __xor_neon_4(unsigned long bytes, unsigned long * __restrict p1,
+		const unsigned long * __restrict p2,
+		const unsigned long * __restrict p3,
+		const unsigned long * __restrict p4)
+{
+	uint64_t *dp1 = (uint64_t *)p1;
+	uint64_t *dp2 = (uint64_t *)p2;
+	uint64_t *dp3 = (uint64_t *)p3;
+	uint64_t *dp4 = (uint64_t *)p4;
+
+	register uint64x2_t v0, v1, v2, v3;
+	long lines = bytes / (sizeof(uint64x2_t) * 4);
+
+	do {
+		/* p1 ^= p2 */
+		v0 = veorq_u64(vld1q_u64(dp1 +  0), vld1q_u64(dp2 +  0));
+		v1 = veorq_u64(vld1q_u64(dp1 +  2), vld1q_u64(dp2 +  2));
+		v2 = veorq_u64(vld1q_u64(dp1 +  4), vld1q_u64(dp2 +  4));
+		v3 = veorq_u64(vld1q_u64(dp1 +  6), vld1q_u64(dp2 +  6));
+
+		/* p1 ^= p3 */
+		v0 = veorq_u64(v0, vld1q_u64(dp3 +  0));
+		v1 = veorq_u64(v1, vld1q_u64(dp3 +  2));
+		v2 = veorq_u64(v2, vld1q_u64(dp3 +  4));
+		v3 = veorq_u64(v3, vld1q_u64(dp3 +  6));
+
+		/* p1 ^= p4 */
+		v0 = veorq_u64(v0, vld1q_u64(dp4 +  0));
+		v1 = veorq_u64(v1, vld1q_u64(dp4 +  2));
+		v2 = veorq_u64(v2, vld1q_u64(dp4 +  4));
+		v3 = veorq_u64(v3, vld1q_u64(dp4 +  6));
+
+		/* store */
+		vst1q_u64(dp1 +  0, v0);
+		vst1q_u64(dp1 +  2, v1);
+		vst1q_u64(dp1 +  4, v2);
+		vst1q_u64(dp1 +  6, v3);
+
+		dp1 += 8;
+		dp2 += 8;
+		dp3 += 8;
+		dp4 += 8;
+	} while (--lines > 0);
+}
+
+static void __xor_neon_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)
+{
+	uint64_t *dp1 = (uint64_t *)p1;
+	uint64_t *dp2 = (uint64_t *)p2;
+	uint64_t *dp3 = (uint64_t *)p3;
+	uint64_t *dp4 = (uint64_t *)p4;
+	uint64_t *dp5 = (uint64_t *)p5;
+
+	register uint64x2_t v0, v1, v2, v3;
+	long lines = bytes / (sizeof(uint64x2_t) * 4);
+
+	do {
+		/* p1 ^= p2 */
+		v0 = veorq_u64(vld1q_u64(dp1 +  0), vld1q_u64(dp2 +  0));
+		v1 = veorq_u64(vld1q_u64(dp1 +  2), vld1q_u64(dp2 +  2));
+		v2 = veorq_u64(vld1q_u64(dp1 +  4), vld1q_u64(dp2 +  4));
+		v3 = veorq_u64(vld1q_u64(dp1 +  6), vld1q_u64(dp2 +  6));
+
+		/* p1 ^= p3 */
+		v0 = veorq_u64(v0, vld1q_u64(dp3 +  0));
+		v1 = veorq_u64(v1, vld1q_u64(dp3 +  2));
+		v2 = veorq_u64(v2, vld1q_u64(dp3 +  4));
+		v3 = veorq_u64(v3, vld1q_u64(dp3 +  6));
+
+		/* p1 ^= p4 */
+		v0 = veorq_u64(v0, vld1q_u64(dp4 +  0));
+		v1 = veorq_u64(v1, vld1q_u64(dp4 +  2));
+		v2 = veorq_u64(v2, vld1q_u64(dp4 +  4));
+		v3 = veorq_u64(v3, vld1q_u64(dp4 +  6));
+
+		/* p1 ^= p5 */
+		v0 = veorq_u64(v0, vld1q_u64(dp5 +  0));
+		v1 = veorq_u64(v1, vld1q_u64(dp5 +  2));
+		v2 = veorq_u64(v2, vld1q_u64(dp5 +  4));
+		v3 = veorq_u64(v3, vld1q_u64(dp5 +  6));
+
+		/* store */
+		vst1q_u64(dp1 +  0, v0);
+		vst1q_u64(dp1 +  2, v1);
+		vst1q_u64(dp1 +  4, v2);
+		vst1q_u64(dp1 +  6, v3);
+
+		dp1 += 8;
+		dp2 += 8;
+		dp3 += 8;
+		dp4 += 8;
+		dp5 += 8;
+	} while (--lines > 0);
+}
+
+__DO_XOR_BLOCKS(neon_inner, __xor_neon_2, __xor_neon_3, __xor_neon_4,
+		__xor_neon_5);
+
+static inline uint64x2_t eor3(uint64x2_t p, uint64x2_t q, uint64x2_t r)
+{
+	uint64x2_t res;
+
+	asm(ARM64_ASM_PREAMBLE ".arch_extension sha3\n"
+	    "eor3 %0.16b, %1.16b, %2.16b, %3.16b"
+	    : "=w"(res) : "w"(p), "w"(q), "w"(r));
+	return res;
+}
+
+static void __xor_eor3_3(unsigned long bytes, unsigned long * __restrict p1,
+		const unsigned long * __restrict p2,
+		const unsigned long * __restrict p3)
+{
+	uint64_t *dp1 = (uint64_t *)p1;
+	uint64_t *dp2 = (uint64_t *)p2;
+	uint64_t *dp3 = (uint64_t *)p3;
+
+	register uint64x2_t v0, v1, v2, v3;
+	long lines = bytes / (sizeof(uint64x2_t) * 4);
+
+	do {
+		/* p1 ^= p2 ^ p3 */
+		v0 = eor3(vld1q_u64(dp1 + 0), vld1q_u64(dp2 + 0),
+			  vld1q_u64(dp3 + 0));
+		v1 = eor3(vld1q_u64(dp1 + 2), vld1q_u64(dp2 + 2),
+			  vld1q_u64(dp3 + 2));
+		v2 = eor3(vld1q_u64(dp1 + 4), vld1q_u64(dp2 + 4),
+			  vld1q_u64(dp3 + 4));
+		v3 = eor3(vld1q_u64(dp1 + 6), vld1q_u64(dp2 + 6),
+			  vld1q_u64(dp3 + 6));
+
+		/* store */
+		vst1q_u64(dp1 + 0, v0);
+		vst1q_u64(dp1 + 2, v1);
+		vst1q_u64(dp1 + 4, v2);
+		vst1q_u64(dp1 + 6, v3);
+
+		dp1 += 8;
+		dp2 += 8;
+		dp3 += 8;
+	} while (--lines > 0);
+}
+
+static void __xor_eor3_4(unsigned long bytes, unsigned long * __restrict p1,
+		const unsigned long * __restrict p2,
+		const unsigned long * __restrict p3,
+		const unsigned long * __restrict p4)
+{
+	uint64_t *dp1 = (uint64_t *)p1;
+	uint64_t *dp2 = (uint64_t *)p2;
+	uint64_t *dp3 = (uint64_t *)p3;
+	uint64_t *dp4 = (uint64_t *)p4;
+
+	register uint64x2_t v0, v1, v2, v3;
+	long lines = bytes / (sizeof(uint64x2_t) * 4);
+
+	do {
+		/* p1 ^= p2 ^ p3 */
+		v0 = eor3(vld1q_u64(dp1 + 0), vld1q_u64(dp2 + 0),
+			  vld1q_u64(dp3 + 0));
+		v1 = eor3(vld1q_u64(dp1 + 2), vld1q_u64(dp2 + 2),
+			  vld1q_u64(dp3 + 2));
+		v2 = eor3(vld1q_u64(dp1 + 4), vld1q_u64(dp2 + 4),
+			  vld1q_u64(dp3 + 4));
+		v3 = eor3(vld1q_u64(dp1 + 6), vld1q_u64(dp2 + 6),
+			  vld1q_u64(dp3 + 6));
+
+		/* p1 ^= p4 */
+		v0 = veorq_u64(v0, vld1q_u64(dp4 + 0));
+		v1 = veorq_u64(v1, vld1q_u64(dp4 + 2));
+		v2 = veorq_u64(v2, vld1q_u64(dp4 + 4));
+		v3 = veorq_u64(v3, vld1q_u64(dp4 + 6));
+
+		/* store */
+		vst1q_u64(dp1 + 0, v0);
+		vst1q_u64(dp1 + 2, v1);
+		vst1q_u64(dp1 + 4, v2);
+		vst1q_u64(dp1 + 6, v3);
+
+		dp1 += 8;
+		dp2 += 8;
+		dp3 += 8;
+		dp4 += 8;
+	} while (--lines > 0);
+}
+
+static void __xor_eor3_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)
+{
+	uint64_t *dp1 = (uint64_t *)p1;
+	uint64_t *dp2 = (uint64_t *)p2;
+	uint64_t *dp3 = (uint64_t *)p3;
+	uint64_t *dp4 = (uint64_t *)p4;
+	uint64_t *dp5 = (uint64_t *)p5;
+
+	register uint64x2_t v0, v1, v2, v3;
+	long lines = bytes / (sizeof(uint64x2_t) * 4);
+
+	do {
+		/* p1 ^= p2 ^ p3 */
+		v0 = eor3(vld1q_u64(dp1 + 0), vld1q_u64(dp2 + 0),
+			  vld1q_u64(dp3 + 0));
+		v1 = eor3(vld1q_u64(dp1 + 2), vld1q_u64(dp2 + 2),
+			  vld1q_u64(dp3 + 2));
+		v2 = eor3(vld1q_u64(dp1 + 4), vld1q_u64(dp2 + 4),
+			  vld1q_u64(dp3 + 4));
+		v3 = eor3(vld1q_u64(dp1 + 6), vld1q_u64(dp2 + 6),
+			  vld1q_u64(dp3 + 6));
+
+		/* p1 ^= p4 ^ p5 */
+		v0 = eor3(v0, vld1q_u64(dp4 + 0), vld1q_u64(dp5 + 0));
+		v1 = eor3(v1, vld1q_u64(dp4 + 2), vld1q_u64(dp5 + 2));
+		v2 = eor3(v2, vld1q_u64(dp4 + 4), vld1q_u64(dp5 + 4));
+		v3 = eor3(v3, vld1q_u64(dp4 + 6), vld1q_u64(dp5 + 6));
+
+		/* store */
+		vst1q_u64(dp1 + 0, v0);
+		vst1q_u64(dp1 + 2, v1);
+		vst1q_u64(dp1 + 4, v2);
+		vst1q_u64(dp1 + 6, v3);
+
+		dp1 += 8;
+		dp2 += 8;
+		dp3 += 8;
+		dp4 += 8;
+		dp5 += 8;
+	} while (--lines > 0);
+}
+
+__DO_XOR_BLOCKS(eor3_inner, __xor_neon_2, __xor_eor3_3, __xor_eor3_4,
+		__xor_eor3_5);
diff --git a/lib/raid/xor/arm64/xor-neon.h b/lib/raid/xor/arm64/xor-neon.h
new file mode 100644
index 000000000..514699ba8
--- /dev/null
+++ b/lib/raid/xor/arm64/xor-neon.h
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+void xor_gen_neon_inner(void *dest, void **srcs, unsigned int src_cnt,
+		unsigned int bytes);
+void xor_gen_eor3_inner(void *dest, void **srcs, unsigned int src_cnt,
+		unsigned int bytes);
diff --git a/lib/raid/xor/arm64/xor_arch.h b/lib/raid/xor/arm64/xor_arch.h
new file mode 100644
index 000000000..5dbb40319
--- /dev/null
+++ b/lib/raid/xor/arm64/xor_arch.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Authors: Jackie Liu <liuyun01@kylinos.cn>
+ * Copyright (C) 2018,Tianjin KYLIN Information Technology Co., Ltd.
+ */
+#include <asm/simd.h>
+
+extern struct xor_block_template xor_block_neon;
+extern struct xor_block_template xor_block_eor3;
+
+static __always_inline void __init arch_xor_init(void)
+{
+	xor_register(&xor_block_8regs);
+	xor_register(&xor_block_32regs);
+	if (cpu_has_neon()) {
+		if (cpu_have_named_feature(SHA3))
+			xor_register(&xor_block_eor3);
+		else
+			xor_register(&xor_block_neon);
+	}
+}
diff --git a/lib/raid/xor/loongarch/xor_arch.h b/lib/raid/xor/loongarch/xor_arch.h
new file mode 100644
index 000000000..fe5e8244f
--- /dev/null
+++ b/lib/raid/xor/loongarch/xor_arch.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2023 WANG Xuerui <git@xen0n.name>
+ */
+#include <asm/cpu-features.h>
+
+/*
+ * For grins, also test the generic routines.
+ *
+ * More importantly: it cannot be ruled out at this point of time, that some
+ * future (maybe reduced) models could run the vector algorithms slower than
+ * the scalar ones, maybe for errata or micro-op reasons. It may be
+ * appropriate to revisit this after one or two more uarch generations.
+ */
+
+extern struct xor_block_template xor_block_lsx;
+extern struct xor_block_template xor_block_lasx;
+
+static __always_inline void __init arch_xor_init(void)
+{
+	xor_register(&xor_block_8regs);
+	xor_register(&xor_block_8regs_p);
+	xor_register(&xor_block_32regs);
+	xor_register(&xor_block_32regs_p);
+#ifdef CONFIG_CPU_HAS_LSX
+	if (cpu_has_lsx)
+		xor_register(&xor_block_lsx);
+#endif
+#ifdef CONFIG_CPU_HAS_LASX
+	if (cpu_has_lasx)
+		xor_register(&xor_block_lasx);
+#endif
+}
diff --git a/lib/raid/xor/loongarch/xor_simd.c b/lib/raid/xor/loongarch/xor_simd.c
new file mode 100644
index 000000000..84cd24b72
--- /dev/null
+++ b/lib/raid/xor/loongarch/xor_simd.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * LoongArch SIMD XOR operations
+ *
+ * Copyright (C) 2023 WANG Xuerui <git@xen0n.name>
+ */
+
+#include "xor_simd.h"
+
+/*
+ * Process one cache line (64 bytes) per loop. This is assuming all future
+ * popular LoongArch cores are similar performance-characteristics-wise to the
+ * current models.
+ */
+#define LINE_WIDTH 64
+
+#ifdef CONFIG_CPU_HAS_LSX
+
+#define LD(reg, base, offset)	\
+	"vld $vr" #reg ", %[" #base "], " #offset "\n\t"
+#define ST(reg, base, offset)	\
+	"vst $vr" #reg ", %[" #base "], " #offset "\n\t"
+#define XOR(dj, k)	"vxor.v $vr" #dj ", $vr" #dj ", $vr" #k "\n\t"
+
+#define LD_INOUT_LINE(base)	\
+	LD(0, base, 0)		\
+	LD(1, base, 16)		\
+	LD(2, base, 32)		\
+	LD(3, base, 48)
+
+#define LD_AND_XOR_LINE(base)	\
+	LD(4, base, 0)		\
+	LD(5, base, 16)		\
+	LD(6, base, 32)		\
+	LD(7, base, 48)		\
+	XOR(0, 4)		\
+	XOR(1, 5)		\
+	XOR(2, 6)		\
+	XOR(3, 7)
+
+#define ST_LINE(base)		\
+	ST(0, base, 0)		\
+	ST(1, base, 16)		\
+	ST(2, base, 32)		\
+	ST(3, base, 48)
+
+#define XOR_FUNC_NAME(nr) __xor_lsx_##nr
+#include "xor_template.c"
+
+#undef LD
+#undef ST
+#undef XOR
+#undef LD_INOUT_LINE
+#undef LD_AND_XOR_LINE
+#undef ST_LINE
+#undef XOR_FUNC_NAME
+
+#endif /* CONFIG_CPU_HAS_LSX */
+
+#ifdef CONFIG_CPU_HAS_LASX
+
+#define LD(reg, base, offset)	\
+	"xvld $xr" #reg ", %[" #base "], " #offset "\n\t"
+#define ST(reg, base, offset)	\
+	"xvst $xr" #reg ", %[" #base "], " #offset "\n\t"
+#define XOR(dj, k)	"xvxor.v $xr" #dj ", $xr" #dj ", $xr" #k "\n\t"
+
+#define LD_INOUT_LINE(base)	\
+	LD(0, base, 0)		\
+	LD(1, base, 32)
+
+#define LD_AND_XOR_LINE(base)	\
+	LD(2, base, 0)		\
+	LD(3, base, 32)		\
+	XOR(0, 2)		\
+	XOR(1, 3)
+
+#define ST_LINE(base)		\
+	ST(0, base, 0)		\
+	ST(1, base, 32)
+
+#define XOR_FUNC_NAME(nr) __xor_lasx_##nr
+#include "xor_template.c"
+
+#undef LD
+#undef ST
+#undef XOR
+#undef LD_INOUT_LINE
+#undef LD_AND_XOR_LINE
+#undef ST_LINE
+#undef XOR_FUNC_NAME
+
+#endif /* CONFIG_CPU_HAS_LASX */
diff --git a/lib/raid/xor/loongarch/xor_simd.h b/lib/raid/xor/loongarch/xor_simd.h
new file mode 100644
index 000000000..f50f32514
--- /dev/null
+++ b/lib/raid/xor/loongarch/xor_simd.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Simple interface to link xor_simd.c and xor_simd_glue.c
+ *
+ * Separating these files ensures that no SIMD instructions are run outside of
+ * the kfpu critical section.
+ */
+
+#ifndef __LOONGARCH_LIB_XOR_SIMD_H
+#define __LOONGARCH_LIB_XOR_SIMD_H
+
+#ifdef CONFIG_CPU_HAS_LSX
+void __xor_lsx_2(unsigned long bytes, unsigned long * __restrict p1,
+		 const unsigned long * __restrict p2);
+void __xor_lsx_3(unsigned long bytes, unsigned long * __restrict p1,
+		 const unsigned long * __restrict p2, const unsigned long * __restrict p3);
+void __xor_lsx_4(unsigned long bytes, unsigned long * __restrict p1,
+		 const unsigned long * __restrict p2, const unsigned long * __restrict p3,
+		 const unsigned long * __restrict p4);
+void __xor_lsx_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);
+#endif /* CONFIG_CPU_HAS_LSX */
+
+#ifdef CONFIG_CPU_HAS_LASX
+void __xor_lasx_2(unsigned long bytes, unsigned long * __restrict p1,
+		  const unsigned long * __restrict p2);
+void __xor_lasx_3(unsigned long bytes, unsigned long * __restrict p1,
+		  const unsigned long * __restrict p2, const unsigned long * __restrict p3);
+void __xor_lasx_4(unsigned long bytes, unsigned long * __restrict p1,
+		  const unsigned long * __restrict p2, const unsigned long * __restrict p3,
+		  const unsigned long * __restrict p4);
+void __xor_lasx_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);
+#endif /* CONFIG_CPU_HAS_LASX */
+
+#endif /* __LOONGARCH_LIB_XOR_SIMD_H */
diff --git a/lib/raid/xor/loongarch/xor_simd_glue.c b/lib/raid/xor/loongarch/xor_simd_glue.c
new file mode 100644
index 000000000..7f324d924
--- /dev/null
+++ b/lib/raid/xor/loongarch/xor_simd_glue.c
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * LoongArch SIMD XOR operations
+ *
+ * Copyright (C) 2023 WANG Xuerui <git@xen0n.name>
+ */
+
+#include <linux/sched.h>
+#include <asm/fpu.h>
+#include "xor_impl.h"
+#include "xor_arch.h"
+#include "xor_simd.h"
+
+#define MAKE_XOR_GLUES(flavor)							\
+DO_XOR_BLOCKS(flavor##_inner, __xor_##flavor##_2, __xor_##flavor##_3,		\
+		__xor_##flavor##_4, __xor_##flavor##_5);			\
+										\
+static void xor_gen_##flavor(void *dest, void **srcs, unsigned int src_cnt,	\
+		unsigned int bytes)						\
+{										\
+	kernel_fpu_begin();							\
+	xor_gen_##flavor##_inner(dest, srcs, src_cnt, bytes);			\
+	kernel_fpu_end();							\
+}										\
+										\
+struct xor_block_template xor_block_##flavor = {				\
+	.name		= __stringify(flavor),					\
+	.xor_gen	= xor_gen_##flavor					\
+}
+
+#ifdef CONFIG_CPU_HAS_LSX
+MAKE_XOR_GLUES(lsx);
+#endif /* CONFIG_CPU_HAS_LSX */
+
+#ifdef CONFIG_CPU_HAS_LASX
+MAKE_XOR_GLUES(lasx);
+#endif /* CONFIG_CPU_HAS_LASX */
diff --git a/lib/raid/xor/loongarch/xor_template.c b/lib/raid/xor/loongarch/xor_template.c
new file mode 100644
index 000000000..0358ced7f
--- /dev/null
+++ b/lib/raid/xor/loongarch/xor_template.c
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2023 WANG Xuerui <git@xen0n.name>
+ *
+ * Template for XOR operations, instantiated in xor_simd.c.
+ *
+ * Expected preprocessor definitions:
+ *
+ * - LINE_WIDTH
+ * - XOR_FUNC_NAME(nr)
+ * - LD_INOUT_LINE(buf)
+ * - LD_AND_XOR_LINE(buf)
+ * - ST_LINE(buf)
+ */
+
+void XOR_FUNC_NAME(2)(unsigned long bytes,
+		      unsigned long * __restrict v1,
+		      const unsigned long * __restrict v2)
+{
+	unsigned long lines = bytes / LINE_WIDTH;
+
+	do {
+		__asm__ __volatile__ (
+			LD_INOUT_LINE(v1)
+			LD_AND_XOR_LINE(v2)
+			ST_LINE(v1)
+		: : [v1] "r"(v1), [v2] "r"(v2) : "memory"
+		);
+
+		v1 += LINE_WIDTH / sizeof(unsigned long);
+		v2 += LINE_WIDTH / sizeof(unsigned long);
+	} while (--lines > 0);
+}
+
+void XOR_FUNC_NAME(3)(unsigned long bytes,
+		      unsigned long * __restrict v1,
+		      const unsigned long * __restrict v2,
+		      const unsigned long * __restrict v3)
+{
+	unsigned long lines = bytes / LINE_WIDTH;
+
+	do {
+		__asm__ __volatile__ (
+			LD_INOUT_LINE(v1)
+			LD_AND_XOR_LINE(v2)
+			LD_AND_XOR_LINE(v3)
+			ST_LINE(v1)
+		: : [v1] "r"(v1), [v2] "r"(v2), [v3] "r"(v3) : "memory"
+		);
+
+		v1 += LINE_WIDTH / sizeof(unsigned long);
+		v2 += LINE_WIDTH / sizeof(unsigned long);
+		v3 += LINE_WIDTH / sizeof(unsigned long);
+	} while (--lines > 0);
+}
+
+void XOR_FUNC_NAME(4)(unsigned long bytes,
+		      unsigned long * __restrict v1,
+		      const unsigned long * __restrict v2,
+		      const unsigned long * __restrict v3,
+		      const unsigned long * __restrict v4)
+{
+	unsigned long lines = bytes / LINE_WIDTH;
+
+	do {
+		__asm__ __volatile__ (
+			LD_INOUT_LINE(v1)
+			LD_AND_XOR_LINE(v2)
+			LD_AND_XOR_LINE(v3)
+			LD_AND_XOR_LINE(v4)
+			ST_LINE(v1)
+		: : [v1] "r"(v1), [v2] "r"(v2), [v3] "r"(v3), [v4] "r"(v4)
+		: "memory"
+		);
+
+		v1 += LINE_WIDTH / sizeof(unsigned long);
+		v2 += LINE_WIDTH / sizeof(unsigned long);
+		v3 += LINE_WIDTH / sizeof(unsigned long);
+		v4 += LINE_WIDTH / sizeof(unsigned long);
+	} while (--lines > 0);
+}
+
+void XOR_FUNC_NAME(5)(unsigned long bytes,
+		      unsigned long * __restrict v1,
+		      const unsigned long * __restrict v2,
+		      const unsigned long * __restrict v3,
+		      const unsigned long * __restrict v4,
+		      const unsigned long * __restrict v5)
+{
+	unsigned long lines = bytes / LINE_WIDTH;
+
+	do {
+		__asm__ __volatile__ (
+			LD_INOUT_LINE(v1)
+			LD_AND_XOR_LINE(v2)
+			LD_AND_XOR_LINE(v3)
+			LD_AND_XOR_LINE(v4)
+			LD_AND_XOR_LINE(v5)
+			ST_LINE(v1)
+		: : [v1] "r"(v1), [v2] "r"(v2), [v3] "r"(v3), [v4] "r"(v4),
+		    [v5] "r"(v5) : "memory"
+		);
+
+		v1 += LINE_WIDTH / sizeof(unsigned long);
+		v2 += LINE_WIDTH / sizeof(unsigned long);
+		v3 += LINE_WIDTH / sizeof(unsigned long);
+		v4 += LINE_WIDTH / sizeof(unsigned long);
+		v5 += LINE_WIDTH / sizeof(unsigned long);
+	} while (--lines > 0);
+}
diff --git a/lib/raid/xor/powerpc/xor_arch.h b/lib/raid/xor/powerpc/xor_arch.h
new file mode 100644
index 000000000..3b00a4a2f
--- /dev/null
+++ b/lib/raid/xor/powerpc/xor_arch.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *
+ * Copyright (C) IBM Corporation, 2012
+ *
+ * Author: Anton Blanchard <anton@au.ibm.com>
+ */
+#include <asm/cpu_has_feature.h>
+
+extern struct xor_block_template xor_block_altivec;
+
+static __always_inline void __init arch_xor_init(void)
+{
+	xor_register(&xor_block_8regs);
+	xor_register(&xor_block_8regs_p);
+	xor_register(&xor_block_32regs);
+	xor_register(&xor_block_32regs_p);
+#ifdef CONFIG_ALTIVEC
+	if (cpu_has_feature(CPU_FTR_ALTIVEC))
+		xor_register(&xor_block_altivec);
+#endif
+}
diff --git a/lib/raid/xor/powerpc/xor_vmx.c b/lib/raid/xor/powerpc/xor_vmx.c
new file mode 100644
index 000000000..09bed98c1
--- /dev/null
+++ b/lib/raid/xor/powerpc/xor_vmx.c
@@ -0,0 +1,160 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ * Copyright (C) IBM Corporation, 2012
+ *
+ * Author: Anton Blanchard <anton@au.ibm.com>
+ */
+
+/*
+ * Sparse (as at v0.5.0) gets very, very confused by this file.
+ * Make it a bit simpler for it.
+ */
+#include "xor_impl.h"
+#if !defined(__CHECKER__)
+#include <altivec.h>
+#else
+#define vec_xor(a, b) a ^ b
+#define vector __attribute__((vector_size(16)))
+#endif
+
+#include "xor_vmx.h"
+
+typedef vector signed char unative_t;
+
+#define DEFINE(V)				\
+	unative_t *V = (unative_t *)V##_in;	\
+	unative_t V##_0, V##_1, V##_2, V##_3
+
+#define LOAD(V)			\
+	do {			\
+		V##_0 = V[0];	\
+		V##_1 = V[1];	\
+		V##_2 = V[2];	\
+		V##_3 = V[3];	\
+	} while (0)
+
+#define STORE(V)		\
+	do {			\
+		V[0] = V##_0;	\
+		V[1] = V##_1;	\
+		V[2] = V##_2;	\
+		V[3] = V##_3;	\
+	} while (0)
+
+#define XOR(V1, V2)					\
+	do {						\
+		V1##_0 = vec_xor(V1##_0, V2##_0);	\
+		V1##_1 = vec_xor(V1##_1, V2##_1);	\
+		V1##_2 = vec_xor(V1##_2, V2##_2);	\
+		V1##_3 = vec_xor(V1##_3, V2##_3);	\
+	} while (0)
+
+static void __xor_altivec_2(unsigned long bytes,
+		unsigned long * __restrict v1_in,
+		const unsigned long * __restrict v2_in)
+{
+	DEFINE(v1);
+	DEFINE(v2);
+	unsigned long lines = bytes / (sizeof(unative_t)) / 4;
+
+	do {
+		LOAD(v1);
+		LOAD(v2);
+		XOR(v1, v2);
+		STORE(v1);
+
+		v1 += 4;
+		v2 += 4;
+	} while (--lines > 0);
+}
+
+static void __xor_altivec_3(unsigned long bytes,
+		unsigned long * __restrict v1_in,
+		const unsigned long * __restrict v2_in,
+		const unsigned long * __restrict v3_in)
+{
+	DEFINE(v1);
+	DEFINE(v2);
+	DEFINE(v3);
+	unsigned long lines = bytes / (sizeof(unative_t)) / 4;
+
+	do {
+		LOAD(v1);
+		LOAD(v2);
+		LOAD(v3);
+		XOR(v1, v2);
+		XOR(v1, v3);
+		STORE(v1);
+
+		v1 += 4;
+		v2 += 4;
+		v3 += 4;
+	} while (--lines > 0);
+}
+
+static void __xor_altivec_4(unsigned long bytes,
+		unsigned long * __restrict v1_in,
+		const unsigned long * __restrict v2_in,
+		const unsigned long * __restrict v3_in,
+		const unsigned long * __restrict v4_in)
+{
+	DEFINE(v1);
+	DEFINE(v2);
+	DEFINE(v3);
+	DEFINE(v4);
+	unsigned long lines = bytes / (sizeof(unative_t)) / 4;
+
+	do {
+		LOAD(v1);
+		LOAD(v2);
+		LOAD(v3);
+		LOAD(v4);
+		XOR(v1, v2);
+		XOR(v3, v4);
+		XOR(v1, v3);
+		STORE(v1);
+
+		v1 += 4;
+		v2 += 4;
+		v3 += 4;
+		v4 += 4;
+	} while (--lines > 0);
+}
+
+static void __xor_altivec_5(unsigned long bytes,
+		unsigned long * __restrict v1_in,
+		const unsigned long * __restrict v2_in,
+		const unsigned long * __restrict v3_in,
+		const unsigned long * __restrict v4_in,
+		const unsigned long * __restrict v5_in)
+{
+	DEFINE(v1);
+	DEFINE(v2);
+	DEFINE(v3);
+	DEFINE(v4);
+	DEFINE(v5);
+	unsigned long lines = bytes / (sizeof(unative_t)) / 4;
+
+	do {
+		LOAD(v1);
+		LOAD(v2);
+		LOAD(v3);
+		LOAD(v4);
+		LOAD(v5);
+		XOR(v1, v2);
+		XOR(v3, v4);
+		XOR(v1, v5);
+		XOR(v1, v3);
+		STORE(v1);
+
+		v1 += 4;
+		v2 += 4;
+		v3 += 4;
+		v4 += 4;
+		v5 += 4;
+	} while (--lines > 0);
+}
+
+__DO_XOR_BLOCKS(altivec_inner, __xor_altivec_2, __xor_altivec_3,
+		__xor_altivec_4, __xor_altivec_5);
diff --git a/lib/raid/xor/powerpc/xor_vmx.h b/lib/raid/xor/powerpc/xor_vmx.h
new file mode 100644
index 000000000..1d26c1133
--- /dev/null
+++ b/lib/raid/xor/powerpc/xor_vmx.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Simple interface to link xor_vmx.c and xor_vmx_glue.c
+ *
+ * Separating these file ensures that no altivec instructions are run
+ * outside of the enable/disable altivec block.
+ */
+
+void xor_gen_altivec_inner(void *dest, void **srcs, unsigned int src_cnt,
+		unsigned int bytes);
diff --git a/lib/raid/xor/powerpc/xor_vmx_glue.c b/lib/raid/xor/powerpc/xor_vmx_glue.c
new file mode 100644
index 000000000..dbfbb5cad
--- /dev/null
+++ b/lib/raid/xor/powerpc/xor_vmx_glue.c
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Altivec XOR operations
+ *
+ * Copyright 2017 IBM Corp.
+ */
+
+#include <linux/preempt.h>
+#include <linux/sched.h>
+#include <asm/switch_to.h>
+#include "xor_impl.h"
+#include "xor_arch.h"
+#include "xor_vmx.h"
+
+static void xor_gen_altivec(void *dest, void **srcs, unsigned int src_cnt,
+		unsigned int bytes)
+{
+	preempt_disable();
+	enable_kernel_altivec();
+	xor_gen_altivec_inner(dest, srcs, src_cnt, bytes);
+	disable_kernel_altivec();
+	preempt_enable();
+}
+
+struct xor_block_template xor_block_altivec = {
+	.name		= "altivec",
+	.xor_gen	= xor_gen_altivec,
+};
diff --git a/lib/raid/xor/riscv/xor-glue.c b/lib/raid/xor/riscv/xor-glue.c
new file mode 100644
index 000000000..2e4c1b05d
--- /dev/null
+++ b/lib/raid/xor/riscv/xor-glue.c
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2021 SiFive
+ */
+
+#include <asm/vector.h>
+#include <asm/switch_to.h>
+#include <asm/asm-prototypes.h>
+#include "xor_impl.h"
+#include "xor_arch.h"
+
+DO_XOR_BLOCKS(vector_inner, xor_regs_2_, xor_regs_3_, xor_regs_4_, xor_regs_5_);
+
+static void xor_gen_vector(void *dest, void **srcs, unsigned int src_cnt,
+		unsigned int bytes)
+{
+	kernel_vector_begin();
+	xor_gen_vector_inner(dest, srcs, src_cnt, bytes);
+	kernel_vector_end();
+}
+
+struct xor_block_template xor_block_rvv = {
+	.name		= "rvv",
+	.xor_gen	= xor_gen_vector,
+};
diff --git a/lib/raid/xor/riscv/xor.S b/lib/raid/xor/riscv/xor.S
new file mode 100644
index 000000000..56fb7fc1e
--- /dev/null
+++ b/lib/raid/xor/riscv/xor.S
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2021 SiFive
+ */
+#include <linux/linkage.h>
+#include <linux/export.h>
+#include <asm/asm.h>
+
+SYM_FUNC_START(xor_regs_2_)
+	vsetvli a3, a0, e8, m8, ta, ma
+	vle8.v v0, (a1)
+	vle8.v v8, (a2)
+	sub a0, a0, a3
+	vxor.vv v16, v0, v8
+	add a2, a2, a3
+	vse8.v v16, (a1)
+	add a1, a1, a3
+	bnez a0, xor_regs_2_
+	ret
+SYM_FUNC_END(xor_regs_2_)
+
+SYM_FUNC_START(xor_regs_3_)
+	vsetvli a4, a0, e8, m8, ta, ma
+	vle8.v v0, (a1)
+	vle8.v v8, (a2)
+	sub a0, a0, a4
+	vxor.vv v0, v0, v8
+	vle8.v v16, (a3)
+	add a2, a2, a4
+	vxor.vv v16, v0, v16
+	add a3, a3, a4
+	vse8.v v16, (a1)
+	add a1, a1, a4
+	bnez a0, xor_regs_3_
+	ret
+SYM_FUNC_END(xor_regs_3_)
+
+SYM_FUNC_START(xor_regs_4_)
+	vsetvli a5, a0, e8, m8, ta, ma
+	vle8.v v0, (a1)
+	vle8.v v8, (a2)
+	sub a0, a0, a5
+	vxor.vv v0, v0, v8
+	vle8.v v16, (a3)
+	add a2, a2, a5
+	vxor.vv v0, v0, v16
+	vle8.v v24, (a4)
+	add a3, a3, a5
+	vxor.vv v16, v0, v24
+	add a4, a4, a5
+	vse8.v v16, (a1)
+	add a1, a1, a5
+	bnez a0, xor_regs_4_
+	ret
+SYM_FUNC_END(xor_regs_4_)
+
+SYM_FUNC_START(xor_regs_5_)
+	vsetvli a6, a0, e8, m8, ta, ma
+	vle8.v v0, (a1)
+	vle8.v v8, (a2)
+	sub a0, a0, a6
+	vxor.vv v0, v0, v8
+	vle8.v v16, (a3)
+	add a2, a2, a6
+	vxor.vv v0, v0, v16
+	vle8.v v24, (a4)
+	add a3, a3, a6
+	vxor.vv v0, v0, v24
+	vle8.v v8, (a5)
+	add a4, a4, a6
+	vxor.vv v16, v0, v8
+	add a5, a5, a6
+	vse8.v v16, (a1)
+	add a1, a1, a6
+	bnez a0, xor_regs_5_
+	ret
+SYM_FUNC_END(xor_regs_5_)
diff --git a/lib/raid/xor/riscv/xor_arch.h b/lib/raid/xor/riscv/xor_arch.h
new file mode 100644
index 000000000..9240857d7
--- /dev/null
+++ b/lib/raid/xor/riscv/xor_arch.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2021 SiFive
+ */
+#include <asm/vector.h>
+
+extern struct xor_block_template xor_block_rvv;
+
+static __always_inline void __init arch_xor_init(void)
+{
+	xor_register(&xor_block_8regs);
+	xor_register(&xor_block_32regs);
+#ifdef CONFIG_RISCV_ISA_V
+	if (has_vector())
+		xor_register(&xor_block_rvv);
+#endif
+}
diff --git a/lib/raid/xor/s390/xor.c b/lib/raid/xor/s390/xor.c
new file mode 100644
index 000000000..0c478678a
--- /dev/null
+++ b/lib/raid/xor/s390/xor.c
@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Optimized xor_block operation for RAID4/5
+ *
+ * Copyright IBM Corp. 2016
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#include <linux/types.h>
+#include "xor_impl.h"
+#include "xor_arch.h"
+
+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");
+}
+
+DO_XOR_BLOCKS(xc, xor_xc_2, xor_xc_3, xor_xc_4, xor_xc_5);
+
+struct xor_block_template xor_block_xc = {
+	.name		= "xc",
+	.xor_gen	= xor_gen_xc,
+};
diff --git a/lib/raid/xor/s390/xor_arch.h b/lib/raid/xor/s390/xor_arch.h
new file mode 100644
index 000000000..4a233ed2b
--- /dev/null
+++ b/lib/raid/xor/s390/xor_arch.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Optimited xor routines
+ *
+ * Copyright IBM Corp. 2016
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+extern struct xor_block_template xor_block_xc;
+
+static __always_inline void __init arch_xor_init(void)
+{
+	xor_force(&xor_block_xc);
+}
diff --git a/lib/raid/xor/sparc/xor-sparc32.c b/lib/raid/xor/sparc/xor-sparc32.c
new file mode 100644
index 000000000..fb37631e9
--- /dev/null
+++ b/lib/raid/xor/sparc/xor-sparc32.c
@@ -0,0 +1,252 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * High speed xor_block operation for RAID4/5 utilizing the
+ * ldd/std SPARC instructions.
+ *
+ * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz)
+ */
+#include "xor_impl.h"
+#include "xor_arch.h"
+
+static void
+sparc_2(unsigned long bytes, unsigned long * __restrict p1,
+	const unsigned long * __restrict p2)
+{
+	int lines = bytes / (sizeof (long)) / 8;
+
+	do {
+		__asm__ __volatile__(
+		  "ldd [%0 + 0x00], %%g2\n\t"
+		  "ldd [%0 + 0x08], %%g4\n\t"
+		  "ldd [%0 + 0x10], %%o0\n\t"
+		  "ldd [%0 + 0x18], %%o2\n\t"
+		  "ldd [%1 + 0x00], %%o4\n\t"
+		  "ldd [%1 + 0x08], %%l0\n\t"
+		  "ldd [%1 + 0x10], %%l2\n\t"
+		  "ldd [%1 + 0x18], %%l4\n\t"
+		  "xor %%g2, %%o4, %%g2\n\t"
+		  "xor %%g3, %%o5, %%g3\n\t"
+		  "xor %%g4, %%l0, %%g4\n\t"
+		  "xor %%g5, %%l1, %%g5\n\t"
+		  "xor %%o0, %%l2, %%o0\n\t"
+		  "xor %%o1, %%l3, %%o1\n\t"
+		  "xor %%o2, %%l4, %%o2\n\t"
+		  "xor %%o3, %%l5, %%o3\n\t"
+		  "std %%g2, [%0 + 0x00]\n\t"
+		  "std %%g4, [%0 + 0x08]\n\t"
+		  "std %%o0, [%0 + 0x10]\n\t"
+		  "std %%o2, [%0 + 0x18]\n"
+		:
+		: "r" (p1), "r" (p2)
+		: "g2", "g3", "g4", "g5",
+		  "o0", "o1", "o2", "o3", "o4", "o5",
+		  "l0", "l1", "l2", "l3", "l4", "l5");
+		p1 += 8;
+		p2 += 8;
+	} while (--lines > 0);
+}
+
+static void
+sparc_3(unsigned long bytes, unsigned long * __restrict p1,
+	const unsigned long * __restrict p2,
+	const unsigned long * __restrict p3)
+{
+	int lines = bytes / (sizeof (long)) / 8;
+
+	do {
+		__asm__ __volatile__(
+		  "ldd [%0 + 0x00], %%g2\n\t"
+		  "ldd [%0 + 0x08], %%g4\n\t"
+		  "ldd [%0 + 0x10], %%o0\n\t"
+		  "ldd [%0 + 0x18], %%o2\n\t"
+		  "ldd [%1 + 0x00], %%o4\n\t"
+		  "ldd [%1 + 0x08], %%l0\n\t"
+		  "ldd [%1 + 0x10], %%l2\n\t"
+		  "ldd [%1 + 0x18], %%l4\n\t"
+		  "xor %%g2, %%o4, %%g2\n\t"
+		  "xor %%g3, %%o5, %%g3\n\t"
+		  "ldd [%2 + 0x00], %%o4\n\t"
+		  "xor %%g4, %%l0, %%g4\n\t"
+		  "xor %%g5, %%l1, %%g5\n\t"
+		  "ldd [%2 + 0x08], %%l0\n\t"
+		  "xor %%o0, %%l2, %%o0\n\t"
+		  "xor %%o1, %%l3, %%o1\n\t"
+		  "ldd [%2 + 0x10], %%l2\n\t"
+		  "xor %%o2, %%l4, %%o2\n\t"
+		  "xor %%o3, %%l5, %%o3\n\t"
+		  "ldd [%2 + 0x18], %%l4\n\t"
+		  "xor %%g2, %%o4, %%g2\n\t"
+		  "xor %%g3, %%o5, %%g3\n\t"
+		  "xor %%g4, %%l0, %%g4\n\t"
+		  "xor %%g5, %%l1, %%g5\n\t"
+		  "xor %%o0, %%l2, %%o0\n\t"
+		  "xor %%o1, %%l3, %%o1\n\t"
+		  "xor %%o2, %%l4, %%o2\n\t"
+		  "xor %%o3, %%l5, %%o3\n\t"
+		  "std %%g2, [%0 + 0x00]\n\t"
+		  "std %%g4, [%0 + 0x08]\n\t"
+		  "std %%o0, [%0 + 0x10]\n\t"
+		  "std %%o2, [%0 + 0x18]\n"
+		:
+		: "r" (p1), "r" (p2), "r" (p3)
+		: "g2", "g3", "g4", "g5",
+		  "o0", "o1", "o2", "o3", "o4", "o5",
+		  "l0", "l1", "l2", "l3", "l4", "l5");
+		p1 += 8;
+		p2 += 8;
+		p3 += 8;
+	} while (--lines > 0);
+}
+
+static void
+sparc_4(unsigned long bytes, unsigned long * __restrict p1,
+	const unsigned long * __restrict p2,
+	const unsigned long * __restrict p3,
+	const unsigned long * __restrict p4)
+{
+	int lines = bytes / (sizeof (long)) / 8;
+
+	do {
+		__asm__ __volatile__(
+		  "ldd [%0 + 0x00], %%g2\n\t"
+		  "ldd [%0 + 0x08], %%g4\n\t"
+		  "ldd [%0 + 0x10], %%o0\n\t"
+		  "ldd [%0 + 0x18], %%o2\n\t"
+		  "ldd [%1 + 0x00], %%o4\n\t"
+		  "ldd [%1 + 0x08], %%l0\n\t"
+		  "ldd [%1 + 0x10], %%l2\n\t"
+		  "ldd [%1 + 0x18], %%l4\n\t"
+		  "xor %%g2, %%o4, %%g2\n\t"
+		  "xor %%g3, %%o5, %%g3\n\t"
+		  "ldd [%2 + 0x00], %%o4\n\t"
+		  "xor %%g4, %%l0, %%g4\n\t"
+		  "xor %%g5, %%l1, %%g5\n\t"
+		  "ldd [%2 + 0x08], %%l0\n\t"
+		  "xor %%o0, %%l2, %%o0\n\t"
+		  "xor %%o1, %%l3, %%o1\n\t"
+		  "ldd [%2 + 0x10], %%l2\n\t"
+		  "xor %%o2, %%l4, %%o2\n\t"
+		  "xor %%o3, %%l5, %%o3\n\t"
+		  "ldd [%2 + 0x18], %%l4\n\t"
+		  "xor %%g2, %%o4, %%g2\n\t"
+		  "xor %%g3, %%o5, %%g3\n\t"
+		  "ldd [%3 + 0x00], %%o4\n\t"
+		  "xor %%g4, %%l0, %%g4\n\t"
+		  "xor %%g5, %%l1, %%g5\n\t"
+		  "ldd [%3 + 0x08], %%l0\n\t"
+		  "xor %%o0, %%l2, %%o0\n\t"
+		  "xor %%o1, %%l3, %%o1\n\t"
+		  "ldd [%3 + 0x10], %%l2\n\t"
+		  "xor %%o2, %%l4, %%o2\n\t"
+		  "xor %%o3, %%l5, %%o3\n\t"
+		  "ldd [%3 + 0x18], %%l4\n\t"
+		  "xor %%g2, %%o4, %%g2\n\t"
+		  "xor %%g3, %%o5, %%g3\n\t"
+		  "xor %%g4, %%l0, %%g4\n\t"
+		  "xor %%g5, %%l1, %%g5\n\t"
+		  "xor %%o0, %%l2, %%o0\n\t"
+		  "xor %%o1, %%l3, %%o1\n\t"
+		  "xor %%o2, %%l4, %%o2\n\t"
+		  "xor %%o3, %%l5, %%o3\n\t"
+		  "std %%g2, [%0 + 0x00]\n\t"
+		  "std %%g4, [%0 + 0x08]\n\t"
+		  "std %%o0, [%0 + 0x10]\n\t"
+		  "std %%o2, [%0 + 0x18]\n"
+		:
+		: "r" (p1), "r" (p2), "r" (p3), "r" (p4)
+		: "g2", "g3", "g4", "g5",
+		  "o0", "o1", "o2", "o3", "o4", "o5",
+		  "l0", "l1", "l2", "l3", "l4", "l5");
+		p1 += 8;
+		p2 += 8;
+		p3 += 8;
+		p4 += 8;
+	} while (--lines > 0);
+}
+
+static void
+sparc_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)
+{
+	int lines = bytes / (sizeof (long)) / 8;
+
+	do {
+		__asm__ __volatile__(
+		  "ldd [%0 + 0x00], %%g2\n\t"
+		  "ldd [%0 + 0x08], %%g4\n\t"
+		  "ldd [%0 + 0x10], %%o0\n\t"
+		  "ldd [%0 + 0x18], %%o2\n\t"
+		  "ldd [%1 + 0x00], %%o4\n\t"
+		  "ldd [%1 + 0x08], %%l0\n\t"
+		  "ldd [%1 + 0x10], %%l2\n\t"
+		  "ldd [%1 + 0x18], %%l4\n\t"
+		  "xor %%g2, %%o4, %%g2\n\t"
+		  "xor %%g3, %%o5, %%g3\n\t"
+		  "ldd [%2 + 0x00], %%o4\n\t"
+		  "xor %%g4, %%l0, %%g4\n\t"
+		  "xor %%g5, %%l1, %%g5\n\t"
+		  "ldd [%2 + 0x08], %%l0\n\t"
+		  "xor %%o0, %%l2, %%o0\n\t"
+		  "xor %%o1, %%l3, %%o1\n\t"
+		  "ldd [%2 + 0x10], %%l2\n\t"
+		  "xor %%o2, %%l4, %%o2\n\t"
+		  "xor %%o3, %%l5, %%o3\n\t"
+		  "ldd [%2 + 0x18], %%l4\n\t"
+		  "xor %%g2, %%o4, %%g2\n\t"
+		  "xor %%g3, %%o5, %%g3\n\t"
+		  "ldd [%3 + 0x00], %%o4\n\t"
+		  "xor %%g4, %%l0, %%g4\n\t"
+		  "xor %%g5, %%l1, %%g5\n\t"
+		  "ldd [%3 + 0x08], %%l0\n\t"
+		  "xor %%o0, %%l2, %%o0\n\t"
+		  "xor %%o1, %%l3, %%o1\n\t"
+		  "ldd [%3 + 0x10], %%l2\n\t"
+		  "xor %%o2, %%l4, %%o2\n\t"
+		  "xor %%o3, %%l5, %%o3\n\t"
+		  "ldd [%3 + 0x18], %%l4\n\t"
+		  "xor %%g2, %%o4, %%g2\n\t"
+		  "xor %%g3, %%o5, %%g3\n\t"
+		  "ldd [%4 + 0x00], %%o4\n\t"
+		  "xor %%g4, %%l0, %%g4\n\t"
+		  "xor %%g5, %%l1, %%g5\n\t"
+		  "ldd [%4 + 0x08], %%l0\n\t"
+		  "xor %%o0, %%l2, %%o0\n\t"
+		  "xor %%o1, %%l3, %%o1\n\t"
+		  "ldd [%4 + 0x10], %%l2\n\t"
+		  "xor %%o2, %%l4, %%o2\n\t"
+		  "xor %%o3, %%l5, %%o3\n\t"
+		  "ldd [%4 + 0x18], %%l4\n\t"
+		  "xor %%g2, %%o4, %%g2\n\t"
+		  "xor %%g3, %%o5, %%g3\n\t"
+		  "xor %%g4, %%l0, %%g4\n\t"
+		  "xor %%g5, %%l1, %%g5\n\t"
+		  "xor %%o0, %%l2, %%o0\n\t"
+		  "xor %%o1, %%l3, %%o1\n\t"
+		  "xor %%o2, %%l4, %%o2\n\t"
+		  "xor %%o3, %%l5, %%o3\n\t"
+		  "std %%g2, [%0 + 0x00]\n\t"
+		  "std %%g4, [%0 + 0x08]\n\t"
+		  "std %%o0, [%0 + 0x10]\n\t"
+		  "std %%o2, [%0 + 0x18]\n"
+		:
+		: "r" (p1), "r" (p2), "r" (p3), "r" (p4), "r" (p5)
+		: "g2", "g3", "g4", "g5",
+		  "o0", "o1", "o2", "o3", "o4", "o5",
+		  "l0", "l1", "l2", "l3", "l4", "l5");
+		p1 += 8;
+		p2 += 8;
+		p3 += 8;
+		p4 += 8;
+		p5 += 8;
+	} while (--lines > 0);
+}
+
+DO_XOR_BLOCKS(sparc32, sparc_2, sparc_3, sparc_4, sparc_5);
+
+struct xor_block_template xor_block_SPARC = {
+	.name		= "SPARC",
+	.xor_gen	= xor_gen_sparc32,
+};
diff --git a/lib/raid/xor/sparc/xor-sparc64-glue.c b/lib/raid/xor/sparc/xor-sparc64-glue.c
new file mode 100644
index 000000000..a8a686e0d
--- /dev/null
+++ b/lib/raid/xor/sparc/xor-sparc64-glue.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * High speed xor_block operation for RAID4/5 utilizing the
+ * UltraSparc Visual Instruction Set and Niagara block-init
+ * twin-load instructions.
+ *
+ * Copyright (C) 1997, 1999 Jakub Jelinek (jj@ultra.linux.cz)
+ * Copyright (C) 2006 David S. Miller <davem@davemloft.net>
+ */
+
+#include "xor_impl.h"
+#include "xor_arch.h"
+
+void xor_vis_2(unsigned long bytes, unsigned long * __restrict p1,
+	       const unsigned long * __restrict p2);
+void xor_vis_3(unsigned long bytes, unsigned long * __restrict p1,
+	       const unsigned long * __restrict p2,
+	       const unsigned long * __restrict p3);
+void xor_vis_4(unsigned long bytes, unsigned long * __restrict p1,
+	       const unsigned long * __restrict p2,
+	       const unsigned long * __restrict p3,
+	       const unsigned long * __restrict p4);
+void xor_vis_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);
+
+/* XXX Ugh, write cheetah versions... -DaveM */
+
+DO_XOR_BLOCKS(vis, xor_vis_2, xor_vis_3, xor_vis_4, xor_vis_5);
+
+struct xor_block_template xor_block_VIS = {
+        .name		= "VIS",
+	.xor_gen	= xor_gen_vis,
+};
+
+void xor_niagara_2(unsigned long bytes, unsigned long * __restrict p1,
+		   const unsigned long * __restrict p2);
+void xor_niagara_3(unsigned long bytes, unsigned long * __restrict p1,
+		   const unsigned long * __restrict p2,
+		   const unsigned long * __restrict p3);
+void xor_niagara_4(unsigned long bytes, unsigned long * __restrict p1,
+		   const unsigned long * __restrict p2,
+		   const unsigned long * __restrict p3,
+		   const unsigned long * __restrict p4);
+void xor_niagara_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);
+
+DO_XOR_BLOCKS(niagara, xor_niagara_2, xor_niagara_3, xor_niagara_4,
+		xor_niagara_5);
+
+struct xor_block_template xor_block_niagara = {
+        .name		= "Niagara",
+	.xor_gen	= xor_gen_niagara,
+};
diff --git a/lib/raid/xor/sparc/xor-sparc64.S b/lib/raid/xor/sparc/xor-sparc64.S
new file mode 100644
index 000000000..a7b74d473
--- /dev/null
+++ b/lib/raid/xor/sparc/xor-sparc64.S
@@ -0,0 +1,636 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * High speed xor_block operation for RAID4/5 utilizing the
+ * UltraSparc Visual Instruction Set and Niagara store-init/twin-load.
+ *
+ * Copyright (C) 1997, 1999 Jakub Jelinek (jj@ultra.linux.cz)
+ * Copyright (C) 2006 David S. Miller <davem@davemloft.net>
+ */
+
+#include <linux/export.h>
+#include <linux/linkage.h>
+#include <asm/visasm.h>
+#include <asm/asi.h>
+#include <asm/dcu.h>
+#include <asm/spitfire.h>
+
+/*
+ *	Requirements:
+ *	!(((long)dest | (long)sourceN) & (64 - 1)) &&
+ *	!(len & 127) && len >= 256
+ */
+	.text
+
+	/* VIS versions. */
+ENTRY(xor_vis_2)
+	rd	%fprs, %o5
+	andcc	%o5, FPRS_FEF|FPRS_DU, %g0
+	be,pt	%icc, 0f
+	 sethi	%hi(VISenter), %g1
+	jmpl	%g1 + %lo(VISenter), %g7
+	 add	%g7, 8, %g7
+0:	wr	%g0, FPRS_FEF, %fprs
+	rd	%asi, %g1
+	wr	%g0, ASI_BLK_P, %asi
+	membar	#LoadStore|#StoreLoad|#StoreStore
+	sub	%o0, 128, %o0
+	ldda	[%o1] %asi, %f0
+	ldda	[%o2] %asi, %f16
+
+2:	ldda	[%o1 + 64] %asi, %f32
+	fxor	%f0, %f16, %f16
+	fxor	%f2, %f18, %f18
+	fxor	%f4, %f20, %f20
+	fxor	%f6, %f22, %f22
+	fxor	%f8, %f24, %f24
+	fxor	%f10, %f26, %f26
+	fxor	%f12, %f28, %f28
+	fxor	%f14, %f30, %f30
+	stda	%f16, [%o1] %asi
+	ldda	[%o2 + 64] %asi, %f48
+	ldda	[%o1 + 128] %asi, %f0
+	fxor	%f32, %f48, %f48
+	fxor	%f34, %f50, %f50
+	add	%o1, 128, %o1
+	fxor	%f36, %f52, %f52
+	add	%o2, 128, %o2
+	fxor	%f38, %f54, %f54
+	subcc	%o0, 128, %o0
+	fxor	%f40, %f56, %f56
+	fxor	%f42, %f58, %f58
+	fxor	%f44, %f60, %f60
+	fxor	%f46, %f62, %f62
+	stda	%f48, [%o1 - 64] %asi
+	bne,pt	%xcc, 2b
+	 ldda	[%o2] %asi, %f16
+
+	ldda	[%o1 + 64] %asi, %f32
+	fxor	%f0, %f16, %f16
+	fxor	%f2, %f18, %f18
+	fxor	%f4, %f20, %f20
+	fxor	%f6, %f22, %f22
+	fxor	%f8, %f24, %f24
+	fxor	%f10, %f26, %f26
+	fxor	%f12, %f28, %f28
+	fxor	%f14, %f30, %f30
+	stda	%f16, [%o1] %asi
+	ldda	[%o2 + 64] %asi, %f48
+	membar	#Sync
+	fxor	%f32, %f48, %f48
+	fxor	%f34, %f50, %f50
+	fxor	%f36, %f52, %f52
+	fxor	%f38, %f54, %f54
+	fxor	%f40, %f56, %f56
+	fxor	%f42, %f58, %f58
+	fxor	%f44, %f60, %f60
+	fxor	%f46, %f62, %f62
+	stda	%f48, [%o1 + 64] %asi
+	membar	#Sync|#StoreStore|#StoreLoad
+	wr	%g1, %g0, %asi
+	retl
+	  wr	%g0, 0, %fprs
+ENDPROC(xor_vis_2)
+
+ENTRY(xor_vis_3)
+	rd	%fprs, %o5
+	andcc	%o5, FPRS_FEF|FPRS_DU, %g0
+	be,pt	%icc, 0f
+	 sethi	%hi(VISenter), %g1
+	jmpl	%g1 + %lo(VISenter), %g7
+	 add	%g7, 8, %g7
+0:	wr	%g0, FPRS_FEF, %fprs
+	rd	%asi, %g1
+	wr	%g0, ASI_BLK_P, %asi
+	membar	#LoadStore|#StoreLoad|#StoreStore
+	sub	%o0, 64, %o0
+	ldda	[%o1] %asi, %f0
+	ldda	[%o2] %asi, %f16
+
+3:	ldda	[%o3] %asi, %f32
+	fxor	%f0, %f16, %f48
+	fxor	%f2, %f18, %f50
+	add	%o1, 64, %o1
+	fxor	%f4, %f20, %f52
+	fxor	%f6, %f22, %f54
+	add	%o2, 64, %o2
+	fxor	%f8, %f24, %f56
+	fxor	%f10, %f26, %f58
+	fxor	%f12, %f28, %f60
+	fxor	%f14, %f30, %f62
+	ldda	[%o1] %asi, %f0
+	fxor	%f48, %f32, %f48
+	fxor	%f50, %f34, %f50
+	fxor	%f52, %f36, %f52
+	fxor	%f54, %f38, %f54
+	add	%o3, 64, %o3
+	fxor	%f56, %f40, %f56
+	fxor	%f58, %f42, %f58
+	subcc	%o0, 64, %o0
+	fxor	%f60, %f44, %f60
+	fxor	%f62, %f46, %f62
+	stda	%f48, [%o1 - 64] %asi
+	bne,pt	%xcc, 3b
+	 ldda	[%o2] %asi, %f16
+
+	ldda	[%o3] %asi, %f32
+	fxor	%f0, %f16, %f48
+	fxor	%f2, %f18, %f50
+	fxor	%f4, %f20, %f52
+	fxor	%f6, %f22, %f54
+	fxor	%f8, %f24, %f56
+	fxor	%f10, %f26, %f58
+	fxor	%f12, %f28, %f60
+	fxor	%f14, %f30, %f62
+	membar	#Sync
+	fxor	%f48, %f32, %f48
+	fxor	%f50, %f34, %f50
+	fxor	%f52, %f36, %f52
+	fxor	%f54, %f38, %f54
+	fxor	%f56, %f40, %f56
+	fxor	%f58, %f42, %f58
+	fxor	%f60, %f44, %f60
+	fxor	%f62, %f46, %f62
+	stda	%f48, [%o1] %asi
+	membar	#Sync|#StoreStore|#StoreLoad
+	wr	%g1, %g0, %asi
+	retl
+	 wr	%g0, 0, %fprs
+ENDPROC(xor_vis_3)
+
+ENTRY(xor_vis_4)
+	rd	%fprs, %o5
+	andcc	%o5, FPRS_FEF|FPRS_DU, %g0
+	be,pt	%icc, 0f
+	 sethi	%hi(VISenter), %g1
+	jmpl	%g1 + %lo(VISenter), %g7
+	 add	%g7, 8, %g7
+0:	wr	%g0, FPRS_FEF, %fprs
+	rd	%asi, %g1
+	wr	%g0, ASI_BLK_P, %asi
+	membar	#LoadStore|#StoreLoad|#StoreStore
+	sub	%o0, 64, %o0
+	ldda	[%o1] %asi, %f0
+	ldda	[%o2] %asi, %f16
+
+4:	ldda	[%o3] %asi, %f32
+	fxor	%f0, %f16, %f16
+	fxor	%f2, %f18, %f18
+	add	%o1, 64, %o1
+	fxor	%f4, %f20, %f20
+	fxor	%f6, %f22, %f22
+	add	%o2, 64, %o2
+	fxor	%f8, %f24, %f24
+	fxor	%f10, %f26, %f26
+	fxor	%f12, %f28, %f28
+	fxor	%f14, %f30, %f30
+	ldda	[%o4] %asi, %f48
+	fxor	%f16, %f32, %f32
+	fxor	%f18, %f34, %f34
+	fxor	%f20, %f36, %f36
+	fxor	%f22, %f38, %f38
+	add	%o3, 64, %o3
+	fxor	%f24, %f40, %f40
+	fxor	%f26, %f42, %f42
+	fxor	%f28, %f44, %f44
+	fxor	%f30, %f46, %f46
+	ldda	[%o1] %asi, %f0
+	fxor	%f32, %f48, %f48
+	fxor	%f34, %f50, %f50
+	fxor	%f36, %f52, %f52
+	add	%o4, 64, %o4
+	fxor	%f38, %f54, %f54
+	fxor	%f40, %f56, %f56
+	fxor	%f42, %f58, %f58
+	subcc	%o0, 64, %o0
+	fxor	%f44, %f60, %f60
+	fxor	%f46, %f62, %f62
+	stda	%f48, [%o1 - 64] %asi
+	bne,pt	%xcc, 4b
+	 ldda	[%o2] %asi, %f16
+
+	ldda	[%o3] %asi, %f32
+	fxor	%f0, %f16, %f16
+	fxor	%f2, %f18, %f18
+	fxor	%f4, %f20, %f20
+	fxor	%f6, %f22, %f22
+	fxor	%f8, %f24, %f24
+	fxor	%f10, %f26, %f26
+	fxor	%f12, %f28, %f28
+	fxor	%f14, %f30, %f30
+	ldda	[%o4] %asi, %f48
+	fxor	%f16, %f32, %f32
+	fxor	%f18, %f34, %f34
+	fxor	%f20, %f36, %f36
+	fxor	%f22, %f38, %f38
+	fxor	%f24, %f40, %f40
+	fxor	%f26, %f42, %f42
+	fxor	%f28, %f44, %f44
+	fxor	%f30, %f46, %f46
+	membar	#Sync
+	fxor	%f32, %f48, %f48
+	fxor	%f34, %f50, %f50
+	fxor	%f36, %f52, %f52
+	fxor	%f38, %f54, %f54
+	fxor	%f40, %f56, %f56
+	fxor	%f42, %f58, %f58
+	fxor	%f44, %f60, %f60
+	fxor	%f46, %f62, %f62
+	stda	%f48, [%o1] %asi
+	membar	#Sync|#StoreStore|#StoreLoad
+	wr	%g1, %g0, %asi
+	retl
+	 wr	%g0, 0, %fprs
+ENDPROC(xor_vis_4)
+
+ENTRY(xor_vis_5)
+	save	%sp, -192, %sp
+	rd	%fprs, %o5
+	andcc	%o5, FPRS_FEF|FPRS_DU, %g0
+	be,pt	%icc, 0f
+	 sethi	%hi(VISenter), %g1
+	jmpl	%g1 + %lo(VISenter), %g7
+	 add	%g7, 8, %g7
+0:	wr	%g0, FPRS_FEF, %fprs
+	rd	%asi, %g1
+	wr	%g0, ASI_BLK_P, %asi
+	membar	#LoadStore|#StoreLoad|#StoreStore
+	sub	%i0, 64, %i0
+	ldda	[%i1] %asi, %f0
+	ldda	[%i2] %asi, %f16
+
+5:	ldda	[%i3] %asi, %f32
+	fxor	%f0, %f16, %f48
+	fxor	%f2, %f18, %f50
+	add	%i1, 64, %i1
+	fxor	%f4, %f20, %f52
+	fxor	%f6, %f22, %f54
+	add	%i2, 64, %i2
+	fxor	%f8, %f24, %f56
+	fxor	%f10, %f26, %f58
+	fxor	%f12, %f28, %f60
+	fxor	%f14, %f30, %f62
+	ldda	[%i4] %asi, %f16
+	fxor	%f48, %f32, %f48
+	fxor	%f50, %f34, %f50
+	fxor	%f52, %f36, %f52
+	fxor	%f54, %f38, %f54
+	add	%i3, 64, %i3
+	fxor	%f56, %f40, %f56
+	fxor	%f58, %f42, %f58
+	fxor	%f60, %f44, %f60
+	fxor	%f62, %f46, %f62
+	ldda	[%i5] %asi, %f32
+	fxor	%f48, %f16, %f48
+	fxor	%f50, %f18, %f50
+	add	%i4, 64, %i4
+	fxor	%f52, %f20, %f52
+	fxor	%f54, %f22, %f54
+	add	%i5, 64, %i5
+	fxor	%f56, %f24, %f56
+	fxor	%f58, %f26, %f58
+	fxor	%f60, %f28, %f60
+	fxor	%f62, %f30, %f62
+	ldda	[%i1] %asi, %f0
+	fxor	%f48, %f32, %f48
+	fxor	%f50, %f34, %f50
+	fxor	%f52, %f36, %f52
+	fxor	%f54, %f38, %f54
+	fxor	%f56, %f40, %f56
+	fxor	%f58, %f42, %f58
+	subcc	%i0, 64, %i0
+	fxor	%f60, %f44, %f60
+	fxor	%f62, %f46, %f62
+	stda	%f48, [%i1 - 64] %asi
+	bne,pt	%xcc, 5b
+	 ldda	[%i2] %asi, %f16
+
+	ldda	[%i3] %asi, %f32
+	fxor	%f0, %f16, %f48
+	fxor	%f2, %f18, %f50
+	fxor	%f4, %f20, %f52
+	fxor	%f6, %f22, %f54
+	fxor	%f8, %f24, %f56
+	fxor	%f10, %f26, %f58
+	fxor	%f12, %f28, %f60
+	fxor	%f14, %f30, %f62
+	ldda	[%i4] %asi, %f16
+	fxor	%f48, %f32, %f48
+	fxor	%f50, %f34, %f50
+	fxor	%f52, %f36, %f52
+	fxor	%f54, %f38, %f54
+	fxor	%f56, %f40, %f56
+	fxor	%f58, %f42, %f58
+	fxor	%f60, %f44, %f60
+	fxor	%f62, %f46, %f62
+	ldda	[%i5] %asi, %f32
+	fxor	%f48, %f16, %f48
+	fxor	%f50, %f18, %f50
+	fxor	%f52, %f20, %f52
+	fxor	%f54, %f22, %f54
+	fxor	%f56, %f24, %f56
+	fxor	%f58, %f26, %f58
+	fxor	%f60, %f28, %f60
+	fxor	%f62, %f30, %f62
+	membar	#Sync
+	fxor	%f48, %f32, %f48
+	fxor	%f50, %f34, %f50
+	fxor	%f52, %f36, %f52
+	fxor	%f54, %f38, %f54
+	fxor	%f56, %f40, %f56
+	fxor	%f58, %f42, %f58
+	fxor	%f60, %f44, %f60
+	fxor	%f62, %f46, %f62
+	stda	%f48, [%i1] %asi
+	membar	#Sync|#StoreStore|#StoreLoad
+	wr	%g1, %g0, %asi
+	wr	%g0, 0, %fprs
+	ret
+	 restore
+ENDPROC(xor_vis_5)
+
+	/* Niagara versions. */
+ENTRY(xor_niagara_2) /* %o0=bytes, %o1=dest, %o2=src */
+	save		%sp, -192, %sp
+	prefetch	[%i1], #n_writes
+	prefetch	[%i2], #one_read
+	rd		%asi, %g7
+	wr		%g0, ASI_BLK_INIT_QUAD_LDD_P, %asi
+	srlx		%i0, 6, %g1
+	mov		%i1, %i0
+	mov		%i2, %i1
+1:	ldda		[%i1 + 0x00] %asi, %i2	/* %i2/%i3 = src  + 0x00 */
+	ldda		[%i1 + 0x10] %asi, %i4	/* %i4/%i5 = src  + 0x10 */
+	ldda		[%i1 + 0x20] %asi, %g2	/* %g2/%g3 = src  + 0x20 */
+	ldda		[%i1 + 0x30] %asi, %l0	/* %l0/%l1 = src  + 0x30 */
+	prefetch	[%i1 + 0x40], #one_read
+	ldda		[%i0 + 0x00] %asi, %o0  /* %o0/%o1 = dest + 0x00 */
+	ldda		[%i0 + 0x10] %asi, %o2  /* %o2/%o3 = dest + 0x10 */
+	ldda		[%i0 + 0x20] %asi, %o4  /* %o4/%o5 = dest + 0x20 */
+	ldda		[%i0 + 0x30] %asi, %l2  /* %l2/%l3 = dest + 0x30 */
+	prefetch	[%i0 + 0x40], #n_writes
+	xor		%o0, %i2, %o0
+	xor		%o1, %i3, %o1
+	stxa		%o0, [%i0 + 0x00] %asi
+	stxa		%o1, [%i0 + 0x08] %asi
+	xor		%o2, %i4, %o2
+	xor		%o3, %i5, %o3
+	stxa		%o2, [%i0 + 0x10] %asi
+	stxa		%o3, [%i0 + 0x18] %asi
+	xor		%o4, %g2, %o4
+	xor		%o5, %g3, %o5
+	stxa		%o4, [%i0 + 0x20] %asi
+	stxa		%o5, [%i0 + 0x28] %asi
+	xor		%l2, %l0, %l2
+	xor		%l3, %l1, %l3
+	stxa		%l2, [%i0 + 0x30] %asi
+	stxa		%l3, [%i0 + 0x38] %asi
+	add		%i0, 0x40, %i0
+	subcc		%g1, 1, %g1
+	bne,pt		%xcc, 1b
+	 add		%i1, 0x40, %i1
+	membar		#Sync
+	wr		%g7, 0x0, %asi
+	ret
+	 restore
+ENDPROC(xor_niagara_2)
+
+ENTRY(xor_niagara_3) /* %o0=bytes, %o1=dest, %o2=src1, %o3=src2 */
+	save		%sp, -192, %sp
+	prefetch	[%i1], #n_writes
+	prefetch	[%i2], #one_read
+	prefetch	[%i3], #one_read
+	rd		%asi, %g7
+	wr		%g0, ASI_BLK_INIT_QUAD_LDD_P, %asi
+	srlx		%i0, 6, %g1
+	mov		%i1, %i0
+	mov		%i2, %i1
+	mov		%i3, %l7
+1:	ldda		[%i1 + 0x00] %asi, %i2	/* %i2/%i3 = src1 + 0x00 */
+	ldda		[%i1 + 0x10] %asi, %i4	/* %i4/%i5 = src1 + 0x10 */
+	ldda		[%l7 + 0x00] %asi, %g2	/* %g2/%g3 = src2 + 0x00 */
+	ldda		[%l7 + 0x10] %asi, %l0	/* %l0/%l1 = src2 + 0x10 */
+	ldda		[%i0 + 0x00] %asi, %o0  /* %o0/%o1 = dest + 0x00 */
+	ldda		[%i0 + 0x10] %asi, %o2  /* %o2/%o3 = dest + 0x10 */
+	xor		%g2, %i2, %g2
+	xor		%g3, %i3, %g3
+	xor		%o0, %g2, %o0
+	xor		%o1, %g3, %o1
+	stxa		%o0, [%i0 + 0x00] %asi
+	stxa		%o1, [%i0 + 0x08] %asi
+	ldda		[%i1 + 0x20] %asi, %i2	/* %i2/%i3 = src1 + 0x20 */
+	ldda		[%l7 + 0x20] %asi, %g2	/* %g2/%g3 = src2 + 0x20 */
+	ldda		[%i0 + 0x20] %asi, %o0	/* %o0/%o1 = dest + 0x20 */
+	xor		%l0, %i4, %l0
+	xor		%l1, %i5, %l1
+	xor		%o2, %l0, %o2
+	xor		%o3, %l1, %o3
+	stxa		%o2, [%i0 + 0x10] %asi
+	stxa		%o3, [%i0 + 0x18] %asi
+	ldda		[%i1 + 0x30] %asi, %i4	/* %i4/%i5 = src1 + 0x30 */
+	ldda		[%l7 + 0x30] %asi, %l0	/* %l0/%l1 = src2 + 0x30 */
+	ldda		[%i0 + 0x30] %asi, %o2	/* %o2/%o3 = dest + 0x30 */
+	prefetch	[%i1 + 0x40], #one_read
+	prefetch	[%l7 + 0x40], #one_read
+	prefetch	[%i0 + 0x40], #n_writes
+	xor		%g2, %i2, %g2
+	xor		%g3, %i3, %g3
+	xor		%o0, %g2, %o0
+	xor		%o1, %g3, %o1
+	stxa		%o0, [%i0 + 0x20] %asi
+	stxa		%o1, [%i0 + 0x28] %asi
+	xor		%l0, %i4, %l0
+	xor		%l1, %i5, %l1
+	xor		%o2, %l0, %o2
+	xor		%o3, %l1, %o3
+	stxa		%o2, [%i0 + 0x30] %asi
+	stxa		%o3, [%i0 + 0x38] %asi
+	add		%i0, 0x40, %i0
+	add		%i1, 0x40, %i1
+	subcc		%g1, 1, %g1
+	bne,pt		%xcc, 1b
+	 add		%l7, 0x40, %l7
+	membar		#Sync
+	wr		%g7, 0x0, %asi
+	ret
+	 restore
+ENDPROC(xor_niagara_3)
+
+ENTRY(xor_niagara_4) /* %o0=bytes, %o1=dest, %o2=src1, %o3=src2, %o4=src3 */
+	save		%sp, -192, %sp
+	prefetch	[%i1], #n_writes
+	prefetch	[%i2], #one_read
+	prefetch	[%i3], #one_read
+	prefetch	[%i4], #one_read
+	rd		%asi, %g7
+	wr		%g0, ASI_BLK_INIT_QUAD_LDD_P, %asi
+	srlx		%i0, 6, %g1
+	mov		%i1, %i0
+	mov		%i2, %i1
+	mov		%i3, %l7
+	mov		%i4, %l6
+1:	ldda		[%i1 + 0x00] %asi, %i2	/* %i2/%i3 = src1 + 0x00 */
+	ldda		[%l7 + 0x00] %asi, %i4	/* %i4/%i5 = src2 + 0x00 */
+	ldda		[%l6 + 0x00] %asi, %g2	/* %g2/%g3 = src3 + 0x00 */
+	ldda		[%i0 + 0x00] %asi, %l0	/* %l0/%l1 = dest + 0x00 */
+	xor		%i4, %i2, %i4
+	xor		%i5, %i3, %i5
+	ldda		[%i1 + 0x10] %asi, %i2	/* %i2/%i3 = src1 + 0x10 */
+	xor		%g2, %i4, %g2
+	xor		%g3, %i5, %g3
+	ldda		[%l7 + 0x10] %asi, %i4	/* %i4/%i5 = src2 + 0x10 */
+	xor		%l0, %g2, %l0
+	xor		%l1, %g3, %l1
+	stxa		%l0, [%i0 + 0x00] %asi
+	stxa		%l1, [%i0 + 0x08] %asi
+	ldda		[%l6 + 0x10] %asi, %g2	/* %g2/%g3 = src3 + 0x10 */
+	ldda		[%i0 + 0x10] %asi, %l0	/* %l0/%l1 = dest + 0x10 */
+
+	xor		%i4, %i2, %i4
+	xor		%i5, %i3, %i5
+	ldda		[%i1 + 0x20] %asi, %i2	/* %i2/%i3 = src1 + 0x20 */
+	xor		%g2, %i4, %g2
+	xor		%g3, %i5, %g3
+	ldda		[%l7 + 0x20] %asi, %i4	/* %i4/%i5 = src2 + 0x20 */
+	xor		%l0, %g2, %l0
+	xor		%l1, %g3, %l1
+	stxa		%l0, [%i0 + 0x10] %asi
+	stxa		%l1, [%i0 + 0x18] %asi
+	ldda		[%l6 + 0x20] %asi, %g2	/* %g2/%g3 = src3 + 0x20 */
+	ldda		[%i0 + 0x20] %asi, %l0	/* %l0/%l1 = dest + 0x20 */
+
+	xor		%i4, %i2, %i4
+	xor		%i5, %i3, %i5
+	ldda		[%i1 + 0x30] %asi, %i2	/* %i2/%i3 = src1 + 0x30 */
+	xor		%g2, %i4, %g2
+	xor		%g3, %i5, %g3
+	ldda		[%l7 + 0x30] %asi, %i4	/* %i4/%i5 = src2 + 0x30 */
+	xor		%l0, %g2, %l0
+	xor		%l1, %g3, %l1
+	stxa		%l0, [%i0 + 0x20] %asi
+	stxa		%l1, [%i0 + 0x28] %asi
+	ldda		[%l6 + 0x30] %asi, %g2	/* %g2/%g3 = src3 + 0x30 */
+	ldda		[%i0 + 0x30] %asi, %l0	/* %l0/%l1 = dest + 0x30 */
+
+	prefetch	[%i1 + 0x40], #one_read
+	prefetch	[%l7 + 0x40], #one_read
+	prefetch	[%l6 + 0x40], #one_read
+	prefetch	[%i0 + 0x40], #n_writes
+
+	xor		%i4, %i2, %i4
+	xor		%i5, %i3, %i5
+	xor		%g2, %i4, %g2
+	xor		%g3, %i5, %g3
+	xor		%l0, %g2, %l0
+	xor		%l1, %g3, %l1
+	stxa		%l0, [%i0 + 0x30] %asi
+	stxa		%l1, [%i0 + 0x38] %asi
+
+	add		%i0, 0x40, %i0
+	add		%i1, 0x40, %i1
+	add		%l7, 0x40, %l7
+	subcc		%g1, 1, %g1
+	bne,pt		%xcc, 1b
+	 add		%l6, 0x40, %l6
+	membar		#Sync
+	wr		%g7, 0x0, %asi
+	ret
+	 restore
+ENDPROC(xor_niagara_4)
+
+ENTRY(xor_niagara_5) /* %o0=bytes, %o1=dest, %o2=src1, %o3=src2, %o4=src3, %o5=src4 */
+	save		%sp, -192, %sp
+	prefetch	[%i1], #n_writes
+	prefetch	[%i2], #one_read
+	prefetch	[%i3], #one_read
+	prefetch	[%i4], #one_read
+	prefetch	[%i5], #one_read
+	rd		%asi, %g7
+	wr		%g0, ASI_BLK_INIT_QUAD_LDD_P, %asi
+	srlx		%i0, 6, %g1
+	mov		%i1, %i0
+	mov		%i2, %i1
+	mov		%i3, %l7
+	mov		%i4, %l6
+	mov		%i5, %l5
+1:	ldda		[%i1 + 0x00] %asi, %i2	/* %i2/%i3 = src1 + 0x00 */
+	ldda		[%l7 + 0x00] %asi, %i4	/* %i4/%i5 = src2 + 0x00 */
+	ldda		[%l6 + 0x00] %asi, %g2	/* %g2/%g3 = src3 + 0x00 */
+	ldda		[%l5 + 0x00] %asi, %l0	/* %l0/%l1 = src4 + 0x00 */
+	ldda		[%i0 + 0x00] %asi, %l2	/* %l2/%l3 = dest + 0x00 */
+	xor		%i4, %i2, %i4
+	xor		%i5, %i3, %i5
+	ldda		[%i1 + 0x10] %asi, %i2	/* %i2/%i3 = src1 + 0x10 */
+	xor		%g2, %i4, %g2
+	xor		%g3, %i5, %g3
+	ldda		[%l7 + 0x10] %asi, %i4	/* %i4/%i5 = src2 + 0x10 */
+	xor		%l0, %g2, %l0
+	xor		%l1, %g3, %l1
+	ldda		[%l6 + 0x10] %asi, %g2	/* %g2/%g3 = src3 + 0x10 */
+	xor		%l2, %l0, %l2
+	xor		%l3, %l1, %l3
+	stxa		%l2, [%i0 + 0x00] %asi
+	stxa		%l3, [%i0 + 0x08] %asi
+	ldda		[%l5 + 0x10] %asi, %l0	/* %l0/%l1 = src4 + 0x10 */
+	ldda		[%i0 + 0x10] %asi, %l2	/* %l2/%l3 = dest + 0x10 */
+
+	xor		%i4, %i2, %i4
+	xor		%i5, %i3, %i5
+	ldda		[%i1 + 0x20] %asi, %i2	/* %i2/%i3 = src1 + 0x20 */
+	xor		%g2, %i4, %g2
+	xor		%g3, %i5, %g3
+	ldda		[%l7 + 0x20] %asi, %i4	/* %i4/%i5 = src2 + 0x20 */
+	xor		%l0, %g2, %l0
+	xor		%l1, %g3, %l1
+	ldda		[%l6 + 0x20] %asi, %g2	/* %g2/%g3 = src3 + 0x20 */
+	xor		%l2, %l0, %l2
+	xor		%l3, %l1, %l3
+	stxa		%l2, [%i0 + 0x10] %asi
+	stxa		%l3, [%i0 + 0x18] %asi
+	ldda		[%l5 + 0x20] %asi, %l0	/* %l0/%l1 = src4 + 0x20 */
+	ldda		[%i0 + 0x20] %asi, %l2	/* %l2/%l3 = dest + 0x20 */
+
+	xor		%i4, %i2, %i4
+	xor		%i5, %i3, %i5
+	ldda		[%i1 + 0x30] %asi, %i2	/* %i2/%i3 = src1 + 0x30 */
+	xor		%g2, %i4, %g2
+	xor		%g3, %i5, %g3
+	ldda		[%l7 + 0x30] %asi, %i4	/* %i4/%i5 = src2 + 0x30 */
+	xor		%l0, %g2, %l0
+	xor		%l1, %g3, %l1
+	ldda		[%l6 + 0x30] %asi, %g2	/* %g2/%g3 = src3 + 0x30 */
+	xor		%l2, %l0, %l2
+	xor		%l3, %l1, %l3
+	stxa		%l2, [%i0 + 0x20] %asi
+	stxa		%l3, [%i0 + 0x28] %asi
+	ldda		[%l5 + 0x30] %asi, %l0	/* %l0/%l1 = src4 + 0x30 */
+	ldda		[%i0 + 0x30] %asi, %l2	/* %l2/%l3 = dest + 0x30 */
+
+	prefetch	[%i1 + 0x40], #one_read
+	prefetch	[%l7 + 0x40], #one_read
+	prefetch	[%l6 + 0x40], #one_read
+	prefetch	[%l5 + 0x40], #one_read
+	prefetch	[%i0 + 0x40], #n_writes
+
+	xor		%i4, %i2, %i4
+	xor		%i5, %i3, %i5
+	xor		%g2, %i4, %g2
+	xor		%g3, %i5, %g3
+	xor		%l0, %g2, %l0
+	xor		%l1, %g3, %l1
+	xor		%l2, %l0, %l2
+	xor		%l3, %l1, %l3
+	stxa		%l2, [%i0 + 0x30] %asi
+	stxa		%l3, [%i0 + 0x38] %asi
+
+	add		%i0, 0x40, %i0
+	add		%i1, 0x40, %i1
+	add		%l7, 0x40, %l7
+	add		%l6, 0x40, %l6
+	subcc		%g1, 1, %g1
+	bne,pt		%xcc, 1b
+	 add		%l5, 0x40, %l5
+	membar		#Sync
+	wr		%g7, 0x0, %asi
+	ret
+	 restore
+ENDPROC(xor_niagara_5)
diff --git a/lib/raid/xor/sparc/xor_arch.h b/lib/raid/xor/sparc/xor_arch.h
new file mode 100644
index 000000000..af288abe4
--- /dev/null
+++ b/lib/raid/xor/sparc/xor_arch.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 1997, 1999 Jakub Jelinek (jj@ultra.linux.cz)
+ * Copyright (C) 2006 David S. Miller <davem@davemloft.net>
+ */
+#if defined(__sparc__) && defined(__arch64__)
+#include <asm/spitfire.h>
+
+extern struct xor_block_template xor_block_VIS;
+extern struct xor_block_template xor_block_niagara;
+
+static __always_inline void __init arch_xor_init(void)
+{
+	/* Force VIS for everything except Niagara.  */
+	if (tlb_type == hypervisor &&
+	    (sun4v_chip_type == SUN4V_CHIP_NIAGARA1 ||
+	     sun4v_chip_type == SUN4V_CHIP_NIAGARA2 ||
+	     sun4v_chip_type == SUN4V_CHIP_NIAGARA3 ||
+	     sun4v_chip_type == SUN4V_CHIP_NIAGARA4 ||
+	     sun4v_chip_type == SUN4V_CHIP_NIAGARA5))
+		xor_force(&xor_block_niagara);
+	else
+		xor_force(&xor_block_VIS);
+}
+#else /* sparc64 */
+
+extern struct xor_block_template xor_block_SPARC;
+
+static __always_inline void __init arch_xor_init(void)
+{
+	xor_register(&xor_block_8regs);
+	xor_register(&xor_block_32regs);
+	xor_register(&xor_block_SPARC);
+}
+#endif /* !sparc64 */
diff --git a/lib/raid/xor/tests/Makefile b/lib/raid/xor/tests/Makefile
new file mode 100644
index 000000000..661e8f6ff
--- /dev/null
+++ b/lib/raid/xor/tests/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-$(CONFIG_XOR_KUNIT_TEST) += xor_kunit.o
diff --git a/lib/raid/xor/tests/xor_kunit.c b/lib/raid/xor/tests/xor_kunit.c
new file mode 100644
index 000000000..0c2a3a420
--- /dev/null
+++ b/lib/raid/xor/tests/xor_kunit.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Unit test the XOR library functions.
+ *
+ * Copyright 2024 Google LLC
+ * Copyright 2026 Christoph Hellwig
+ *
+ * Based on the CRC tests by Eric Biggers <ebiggers@google.com>.
+ */
+#include <kunit/test.h>
+#include <linux/prandom.h>
+#include <linux/string_choices.h>
+#include <linux/vmalloc.h>
+#include <linux/raid/xor.h>
+
+#define XOR_KUNIT_SEED			42
+#define XOR_KUNIT_MAX_BYTES		16384
+#define XOR_KUNIT_MAX_BUFFERS		64
+#define XOR_KUNIT_NUM_TEST_ITERS	1000
+
+static struct rnd_state rng;
+static void *test_buffers[XOR_KUNIT_MAX_BUFFERS];
+static void *test_dest;
+static void *test_ref;
+static size_t test_buflen;
+
+static u32 rand32(void)
+{
+	return prandom_u32_state(&rng);
+}
+
+/* Reference implementation using dumb byte-wise XOR */
+static void xor_ref(void *dest, void **srcs, unsigned int src_cnt,
+		unsigned int bytes)
+{
+	unsigned int off, idx;
+	u8 *d = dest;
+
+	for (off = 0; off < bytes; off++) {
+		for (idx = 0; idx < src_cnt; idx++) {
+			u8 *src = srcs[idx];
+
+			d[off] ^= src[off];
+		}
+	}
+}
+
+/* Generate a random length that is a multiple of 512. */
+static unsigned int random_length(unsigned int max_length)
+{
+	return round_up((rand32() % max_length) + 1, 512);
+}
+
+/* Generate a random alignment that is a multiple of 64. */
+static unsigned int random_alignment(unsigned int max_alignment)
+{
+	return ((rand32() % max_alignment) + 1) & ~63;
+}
+
+static void xor_generate_random_data(void)
+{
+	int i;
+
+	prandom_bytes_state(&rng, test_dest, test_buflen);
+	memcpy(test_ref, test_dest, test_buflen);
+	for (i = 0; i < XOR_KUNIT_MAX_BUFFERS; i++)
+		prandom_bytes_state(&rng, test_buffers[i], test_buflen);
+}
+
+/* Test that xor_gen gives the same result as a reference implementation. */
+static void xor_test(struct kunit *test)
+{
+	void *aligned_buffers[XOR_KUNIT_MAX_BUFFERS];
+	size_t i;
+
+	for (i = 0; i < XOR_KUNIT_NUM_TEST_ITERS; i++) {
+		unsigned int nr_buffers =
+			(rand32() % XOR_KUNIT_MAX_BUFFERS) + 1;
+		unsigned int len = random_length(XOR_KUNIT_MAX_BYTES);
+		unsigned int max_alignment, align = 0;
+		void *buffers;
+
+		if (rand32() % 8 == 0)
+			/* Refresh the data occasionally. */
+			xor_generate_random_data();
+
+		/*
+		 * If we're not using the entire buffer size, inject randomize
+		 * alignment into the buffer.
+		 */
+		max_alignment = XOR_KUNIT_MAX_BYTES - len;
+		if (max_alignment == 0) {
+			buffers = test_buffers;
+		} else if (rand32() % 2 == 0) {
+			/* Use random alignments mod 64 */
+			int j;
+
+			for (j = 0; j < nr_buffers; j++)
+				aligned_buffers[j] = test_buffers[j] +
+					random_alignment(max_alignment);
+			buffers = aligned_buffers;
+			align = random_alignment(max_alignment);
+		} else {
+			/* Go up to the guard page, to catch buffer overreads */
+			int j;
+
+			align = test_buflen - len;
+			for (j = 0; j < nr_buffers; j++)
+				aligned_buffers[j] = test_buffers[j] + align;
+			buffers = aligned_buffers;
+		}
+
+		/*
+		 * Compute the XOR, and verify that it equals the XOR computed
+		 * by a simple byte-at-a-time reference implementation.
+		 */
+		xor_ref(test_ref + align, buffers, nr_buffers, len);
+		xor_gen(test_dest + align, buffers, nr_buffers, len);
+		KUNIT_EXPECT_MEMEQ_MSG(test, test_ref + align,
+				test_dest + align, len,
+				"Wrong result with buffers=%u, len=%u, unaligned=%s, at_end=%s",
+				nr_buffers, len,
+				str_yes_no(max_alignment),
+				str_yes_no(align + len == test_buflen));
+	}
+}
+
+static struct kunit_case xor_test_cases[] = {
+	KUNIT_CASE(xor_test),
+	{},
+};
+
+static int xor_suite_init(struct kunit_suite *suite)
+{
+	int i;
+
+	/*
+	 * Allocate the test buffer using vmalloc() with a page-aligned length
+	 * so that it is immediately followed by a guard page.  This allows
+	 * buffer overreads to be detected, even in assembly code.
+	 */
+	test_buflen = round_up(XOR_KUNIT_MAX_BYTES, PAGE_SIZE);
+	test_ref = vmalloc(test_buflen);
+	if (!test_ref)
+		return -ENOMEM;
+	test_dest = vmalloc(test_buflen);
+	if (!test_dest)
+		goto out_free_ref;
+	for (i = 0; i < XOR_KUNIT_MAX_BUFFERS; i++) {
+		test_buffers[i] = vmalloc(test_buflen);
+		if (!test_buffers[i])
+			goto out_free_buffers;
+	}
+
+	prandom_seed_state(&rng, XOR_KUNIT_SEED);
+	xor_generate_random_data();
+	return 0;
+
+out_free_buffers:
+	while (--i >= 0)
+		vfree(test_buffers[i]);
+	vfree(test_dest);
+out_free_ref:
+	vfree(test_ref);
+	return -ENOMEM;
+}
+
+static void xor_suite_exit(struct kunit_suite *suite)
+{
+	int i;
+
+	vfree(test_ref);
+	vfree(test_dest);
+	for (i = 0; i < XOR_KUNIT_MAX_BUFFERS; i++)
+		vfree(test_buffers[i]);
+}
+
+static struct kunit_suite xor_test_suite = {
+	.name		= "xor",
+	.test_cases	= xor_test_cases,
+	.suite_init	= xor_suite_init,
+	.suite_exit	= xor_suite_exit,
+};
+kunit_test_suite(xor_test_suite);
+
+MODULE_DESCRIPTION("Unit test for the XOR library functions");
+MODULE_LICENSE("GPL");
diff --git a/lib/raid/xor/um/xor_arch.h b/lib/raid/xor/um/xor_arch.h
new file mode 100644
index 000000000..a33e57a26
--- /dev/null
+++ b/lib/raid/xor/um/xor_arch.h
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <../x86/xor_arch.h>
diff --git a/lib/raid/xor/x86/xor-avx.c b/lib/raid/xor/x86/xor-avx.c
new file mode 100644
index 000000000..f7777d7aa
--- /dev/null
+++ b/lib/raid/xor/x86/xor-avx.c
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Optimized XOR parity functions for AVX
+ *
+ * Copyright (C) 2012 Intel Corporation
+ * Author: Jim Kukunas <james.t.kukunas@linux.intel.com>
+ *
+ * Based on Ingo Molnar and Zach Brown's respective MMX and SSE routines
+ */
+#include <linux/compiler.h>
+#include <asm/fpu/api.h>
+#include "xor_impl.h"
+#include "xor_arch.h"
+
+#define BLOCK4(i) \
+		BLOCK(32 * i, 0) \
+		BLOCK(32 * (i + 1), 1) \
+		BLOCK(32 * (i + 2), 2) \
+		BLOCK(32 * (i + 3), 3)
+
+#define BLOCK16() \
+		BLOCK4(0) \
+		BLOCK4(4) \
+		BLOCK4(8) \
+		BLOCK4(12)
+
+static void xor_avx_2(unsigned long bytes, unsigned long * __restrict p0,
+		      const unsigned long * __restrict p1)
+{
+	unsigned long lines = bytes >> 9;
+
+	while (lines--) {
+#undef BLOCK
+#define BLOCK(i, reg) \
+do { \
+	asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p1[i / sizeof(*p1)])); \
+	asm volatile("vxorps %0, %%ymm" #reg ", %%ymm"  #reg : : \
+		"m" (p0[i / sizeof(*p0)])); \
+	asm volatile("vmovdqa %%ymm" #reg ", %0" : \
+		"=m" (p0[i / sizeof(*p0)])); \
+} while (0);
+
+		BLOCK16()
+
+		p0 = (unsigned long *)((uintptr_t)p0 + 512);
+		p1 = (unsigned long *)((uintptr_t)p1 + 512);
+	}
+}
+
+static void xor_avx_3(unsigned long bytes, unsigned long * __restrict p0,
+		      const unsigned long * __restrict p1,
+		      const unsigned long * __restrict p2)
+{
+	unsigned long lines = bytes >> 9;
+
+	while (lines--) {
+#undef BLOCK
+#define BLOCK(i, reg) \
+do { \
+	asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p2[i / sizeof(*p2)])); \
+	asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
+		"m" (p1[i / sizeof(*p1)])); \
+	asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
+		"m" (p0[i / sizeof(*p0)])); \
+	asm volatile("vmovdqa %%ymm" #reg ", %0" : \
+		"=m" (p0[i / sizeof(*p0)])); \
+} while (0);
+
+		BLOCK16()
+
+		p0 = (unsigned long *)((uintptr_t)p0 + 512);
+		p1 = (unsigned long *)((uintptr_t)p1 + 512);
+		p2 = (unsigned long *)((uintptr_t)p2 + 512);
+	}
+}
+
+static void xor_avx_4(unsigned long bytes, unsigned long * __restrict p0,
+		      const unsigned long * __restrict p1,
+		      const unsigned long * __restrict p2,
+		      const unsigned long * __restrict p3)
+{
+	unsigned long lines = bytes >> 9;
+
+	while (lines--) {
+#undef BLOCK
+#define BLOCK(i, reg) \
+do { \
+	asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p3[i / sizeof(*p3)])); \
+	asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
+		"m" (p2[i / sizeof(*p2)])); \
+	asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
+		"m" (p1[i / sizeof(*p1)])); \
+	asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
+		"m" (p0[i / sizeof(*p0)])); \
+	asm volatile("vmovdqa %%ymm" #reg ", %0" : \
+		"=m" (p0[i / sizeof(*p0)])); \
+} while (0);
+
+		BLOCK16();
+
+		p0 = (unsigned long *)((uintptr_t)p0 + 512);
+		p1 = (unsigned long *)((uintptr_t)p1 + 512);
+		p2 = (unsigned long *)((uintptr_t)p2 + 512);
+		p3 = (unsigned long *)((uintptr_t)p3 + 512);
+	}
+}
+
+static void xor_avx_5(unsigned long bytes, unsigned long * __restrict p0,
+	     const unsigned long * __restrict p1,
+	     const unsigned long * __restrict p2,
+	     const unsigned long * __restrict p3,
+	     const unsigned long * __restrict p4)
+{
+	unsigned long lines = bytes >> 9;
+
+	while (lines--) {
+#undef BLOCK
+#define BLOCK(i, reg) \
+do { \
+	asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p4[i / sizeof(*p4)])); \
+	asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
+		"m" (p3[i / sizeof(*p3)])); \
+	asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
+		"m" (p2[i / sizeof(*p2)])); \
+	asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
+		"m" (p1[i / sizeof(*p1)])); \
+	asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
+		"m" (p0[i / sizeof(*p0)])); \
+	asm volatile("vmovdqa %%ymm" #reg ", %0" : \
+		"=m" (p0[i / sizeof(*p0)])); \
+} while (0);
+
+		BLOCK16()
+
+		p0 = (unsigned long *)((uintptr_t)p0 + 512);
+		p1 = (unsigned long *)((uintptr_t)p1 + 512);
+		p2 = (unsigned long *)((uintptr_t)p2 + 512);
+		p3 = (unsigned long *)((uintptr_t)p3 + 512);
+		p4 = (unsigned long *)((uintptr_t)p4 + 512);
+	}
+}
+
+DO_XOR_BLOCKS(avx_inner, xor_avx_2, xor_avx_3, xor_avx_4, xor_avx_5);
+
+static void xor_gen_avx(void *dest, void **srcs, unsigned int src_cnt,
+			unsigned int bytes)
+{
+	kernel_fpu_begin();
+	xor_gen_avx_inner(dest, srcs, src_cnt, bytes);
+	kernel_fpu_end();
+}
+
+struct xor_block_template xor_block_avx = {
+	.name		= "avx",
+	.xor_gen	= xor_gen_avx,
+};
diff --git a/lib/raid/xor/x86/xor-mmx.c b/lib/raid/xor/x86/xor-mmx.c
new file mode 100644
index 000000000..63a8b0444
--- /dev/null
+++ b/lib/raid/xor/x86/xor-mmx.c
@@ -0,0 +1,515 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Optimized XOR parity functions for MMX.
+ *
+ * Copyright (C) 1998 Ingo Molnar.
+ */
+#include <asm/fpu/api.h>
+#include "xor_impl.h"
+#include "xor_arch.h"
+
+#define LD(x, y)	"       movq   8*("#x")(%1), %%mm"#y"   ;\n"
+#define ST(x, y)	"       movq %%mm"#y",   8*("#x")(%1)   ;\n"
+#define XO1(x, y)	"       pxor   8*("#x")(%2), %%mm"#y"   ;\n"
+#define XO2(x, y)	"       pxor   8*("#x")(%3), %%mm"#y"   ;\n"
+#define XO3(x, y)	"       pxor   8*("#x")(%4), %%mm"#y"   ;\n"
+#define XO4(x, y)	"       pxor   8*("#x")(%5), %%mm"#y"   ;\n"
+
+static void
+xor_pII_mmx_2(unsigned long bytes, unsigned long * __restrict p1,
+	      const unsigned long * __restrict p2)
+{
+	unsigned long lines = bytes >> 7;
+
+	asm volatile(
+#undef BLOCK
+#define BLOCK(i)				\
+	LD(i, 0)				\
+		LD(i + 1, 1)			\
+			LD(i + 2, 2)		\
+				LD(i + 3, 3)	\
+	XO1(i, 0)				\
+	ST(i, 0)				\
+		XO1(i+1, 1)			\
+		ST(i+1, 1)			\
+			XO1(i + 2, 2)		\
+			ST(i + 2, 2)		\
+				XO1(i + 3, 3)	\
+				ST(i + 3, 3)
+
+	" .align 32			;\n"
+	" 1:                            ;\n"
+
+	BLOCK(0)
+	BLOCK(4)
+	BLOCK(8)
+	BLOCK(12)
+
+	"       addl $128, %1         ;\n"
+	"       addl $128, %2         ;\n"
+	"       decl %0               ;\n"
+	"       jnz 1b                ;\n"
+	: "+r" (lines),
+	  "+r" (p1), "+r" (p2)
+	:
+	: "memory");
+}
+
+static void
+xor_pII_mmx_3(unsigned long bytes, unsigned long * __restrict p1,
+	      const unsigned long * __restrict p2,
+	      const unsigned long * __restrict p3)
+{
+	unsigned long lines = bytes >> 7;
+
+	asm volatile(
+#undef BLOCK
+#define BLOCK(i)				\
+	LD(i, 0)				\
+		LD(i + 1, 1)			\
+			LD(i + 2, 2)		\
+				LD(i + 3, 3)	\
+	XO1(i, 0)				\
+		XO1(i + 1, 1)			\
+			XO1(i + 2, 2)		\
+				XO1(i + 3, 3)	\
+	XO2(i, 0)				\
+	ST(i, 0)				\
+		XO2(i + 1, 1)			\
+		ST(i + 1, 1)			\
+			XO2(i + 2, 2)		\
+			ST(i + 2, 2)		\
+				XO2(i + 3, 3)	\
+				ST(i + 3, 3)
+
+	" .align 32			;\n"
+	" 1:                            ;\n"
+
+	BLOCK(0)
+	BLOCK(4)
+	BLOCK(8)
+	BLOCK(12)
+
+	"       addl $128, %1         ;\n"
+	"       addl $128, %2         ;\n"
+	"       addl $128, %3         ;\n"
+	"       decl %0               ;\n"
+	"       jnz 1b                ;\n"
+	: "+r" (lines),
+	  "+r" (p1), "+r" (p2), "+r" (p3)
+	:
+	: "memory");
+}
+
+static void
+xor_pII_mmx_4(unsigned long bytes, unsigned long * __restrict p1,
+	      const unsigned long * __restrict p2,
+	      const unsigned long * __restrict p3,
+	      const unsigned long * __restrict p4)
+{
+	unsigned long lines = bytes >> 7;
+
+	asm volatile(
+#undef BLOCK
+#define BLOCK(i)				\
+	LD(i, 0)				\
+		LD(i + 1, 1)			\
+			LD(i + 2, 2)		\
+				LD(i + 3, 3)	\
+	XO1(i, 0)				\
+		XO1(i + 1, 1)			\
+			XO1(i + 2, 2)		\
+				XO1(i + 3, 3)	\
+	XO2(i, 0)				\
+		XO2(i + 1, 1)			\
+			XO2(i + 2, 2)		\
+				XO2(i + 3, 3)	\
+	XO3(i, 0)				\
+	ST(i, 0)				\
+		XO3(i + 1, 1)			\
+		ST(i + 1, 1)			\
+			XO3(i + 2, 2)		\
+			ST(i + 2, 2)		\
+				XO3(i + 3, 3)	\
+				ST(i + 3, 3)
+
+	" .align 32			;\n"
+	" 1:                            ;\n"
+
+	BLOCK(0)
+	BLOCK(4)
+	BLOCK(8)
+	BLOCK(12)
+
+	"       addl $128, %1         ;\n"
+	"       addl $128, %2         ;\n"
+	"       addl $128, %3         ;\n"
+	"       addl $128, %4         ;\n"
+	"       decl %0               ;\n"
+	"       jnz 1b                ;\n"
+	: "+r" (lines),
+	  "+r" (p1), "+r" (p2), "+r" (p3), "+r" (p4)
+	:
+	: "memory");
+}
+
+
+static void
+xor_pII_mmx_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)
+{
+	unsigned long lines = bytes >> 7;
+
+	/* Make sure GCC forgets anything it knows about p4 or p5,
+	   such that it won't pass to the asm volatile below a
+	   register that is shared with any other variable.  That's
+	   because we modify p4 and p5 there, but we can't mark them
+	   as read/write, otherwise we'd overflow the 10-asm-operands
+	   limit of GCC < 3.1.  */
+	asm("" : "+r" (p4), "+r" (p5));
+
+	asm volatile(
+#undef BLOCK
+#define BLOCK(i)				\
+	LD(i, 0)				\
+		LD(i + 1, 1)			\
+			LD(i + 2, 2)		\
+				LD(i + 3, 3)	\
+	XO1(i, 0)				\
+		XO1(i + 1, 1)			\
+			XO1(i + 2, 2)		\
+				XO1(i + 3, 3)	\
+	XO2(i, 0)				\
+		XO2(i + 1, 1)			\
+			XO2(i + 2, 2)		\
+				XO2(i + 3, 3)	\
+	XO3(i, 0)				\
+		XO3(i + 1, 1)			\
+			XO3(i + 2, 2)		\
+				XO3(i + 3, 3)	\
+	XO4(i, 0)				\
+	ST(i, 0)				\
+		XO4(i + 1, 1)			\
+		ST(i + 1, 1)			\
+			XO4(i + 2, 2)		\
+			ST(i + 2, 2)		\
+				XO4(i + 3, 3)	\
+				ST(i + 3, 3)
+
+	" .align 32			;\n"
+	" 1:                            ;\n"
+
+	BLOCK(0)
+	BLOCK(4)
+	BLOCK(8)
+	BLOCK(12)
+
+	"       addl $128, %1         ;\n"
+	"       addl $128, %2         ;\n"
+	"       addl $128, %3         ;\n"
+	"       addl $128, %4         ;\n"
+	"       addl $128, %5         ;\n"
+	"       decl %0               ;\n"
+	"       jnz 1b                ;\n"
+	: "+r" (lines),
+	  "+r" (p1), "+r" (p2), "+r" (p3)
+	: "r" (p4), "r" (p5)
+	: "memory");
+
+	/* p4 and p5 were modified, and now the variables are dead.
+	   Clobber them just to be sure nobody does something stupid
+	   like assuming they have some legal value.  */
+	asm("" : "=r" (p4), "=r" (p5));
+}
+
+#undef LD
+#undef XO1
+#undef XO2
+#undef XO3
+#undef XO4
+#undef ST
+#undef BLOCK
+
+static void
+xor_p5_mmx_2(unsigned long bytes, unsigned long * __restrict p1,
+	     const unsigned long * __restrict p2)
+{
+	unsigned long lines = bytes >> 6;
+
+	asm volatile(
+	" .align 32	             ;\n"
+	" 1:                         ;\n"
+	"       movq   (%1), %%mm0   ;\n"
+	"       movq  8(%1), %%mm1   ;\n"
+	"       pxor   (%2), %%mm0   ;\n"
+	"       movq 16(%1), %%mm2   ;\n"
+	"       movq %%mm0,   (%1)   ;\n"
+	"       pxor  8(%2), %%mm1   ;\n"
+	"       movq 24(%1), %%mm3   ;\n"
+	"       movq %%mm1,  8(%1)   ;\n"
+	"       pxor 16(%2), %%mm2   ;\n"
+	"       movq 32(%1), %%mm4   ;\n"
+	"       movq %%mm2, 16(%1)   ;\n"
+	"       pxor 24(%2), %%mm3   ;\n"
+	"       movq 40(%1), %%mm5   ;\n"
+	"       movq %%mm3, 24(%1)   ;\n"
+	"       pxor 32(%2), %%mm4   ;\n"
+	"       movq 48(%1), %%mm6   ;\n"
+	"       movq %%mm4, 32(%1)   ;\n"
+	"       pxor 40(%2), %%mm5   ;\n"
+	"       movq 56(%1), %%mm7   ;\n"
+	"       movq %%mm5, 40(%1)   ;\n"
+	"       pxor 48(%2), %%mm6   ;\n"
+	"       pxor 56(%2), %%mm7   ;\n"
+	"       movq %%mm6, 48(%1)   ;\n"
+	"       movq %%mm7, 56(%1)   ;\n"
+
+	"       addl $64, %1         ;\n"
+	"       addl $64, %2         ;\n"
+	"       decl %0              ;\n"
+	"       jnz 1b               ;\n"
+	: "+r" (lines),
+	  "+r" (p1), "+r" (p2)
+	:
+	: "memory");
+}
+
+static void
+xor_p5_mmx_3(unsigned long bytes, unsigned long * __restrict p1,
+	     const unsigned long * __restrict p2,
+	     const unsigned long * __restrict p3)
+{
+	unsigned long lines = bytes >> 6;
+
+	asm volatile(
+	" .align 32,0x90             ;\n"
+	" 1:                         ;\n"
+	"       movq   (%1), %%mm0   ;\n"
+	"       movq  8(%1), %%mm1   ;\n"
+	"       pxor   (%2), %%mm0   ;\n"
+	"       movq 16(%1), %%mm2   ;\n"
+	"       pxor  8(%2), %%mm1   ;\n"
+	"       pxor   (%3), %%mm0   ;\n"
+	"       pxor 16(%2), %%mm2   ;\n"
+	"       movq %%mm0,   (%1)   ;\n"
+	"       pxor  8(%3), %%mm1   ;\n"
+	"       pxor 16(%3), %%mm2   ;\n"
+	"       movq 24(%1), %%mm3   ;\n"
+	"       movq %%mm1,  8(%1)   ;\n"
+	"       movq 32(%1), %%mm4   ;\n"
+	"       movq 40(%1), %%mm5   ;\n"
+	"       pxor 24(%2), %%mm3   ;\n"
+	"       movq %%mm2, 16(%1)   ;\n"
+	"       pxor 32(%2), %%mm4   ;\n"
+	"       pxor 24(%3), %%mm3   ;\n"
+	"       pxor 40(%2), %%mm5   ;\n"
+	"       movq %%mm3, 24(%1)   ;\n"
+	"       pxor 32(%3), %%mm4   ;\n"
+	"       pxor 40(%3), %%mm5   ;\n"
+	"       movq 48(%1), %%mm6   ;\n"
+	"       movq %%mm4, 32(%1)   ;\n"
+	"       movq 56(%1), %%mm7   ;\n"
+	"       pxor 48(%2), %%mm6   ;\n"
+	"       movq %%mm5, 40(%1)   ;\n"
+	"       pxor 56(%2), %%mm7   ;\n"
+	"       pxor 48(%3), %%mm6   ;\n"
+	"       pxor 56(%3), %%mm7   ;\n"
+	"       movq %%mm6, 48(%1)   ;\n"
+	"       movq %%mm7, 56(%1)   ;\n"
+
+	"       addl $64, %1         ;\n"
+	"       addl $64, %2         ;\n"
+	"       addl $64, %3         ;\n"
+	"       decl %0              ;\n"
+	"       jnz 1b               ;\n"
+	: "+r" (lines),
+	  "+r" (p1), "+r" (p2), "+r" (p3)
+	:
+	: "memory" );
+}
+
+static void
+xor_p5_mmx_4(unsigned long bytes, unsigned long * __restrict p1,
+	     const unsigned long * __restrict p2,
+	     const unsigned long * __restrict p3,
+	     const unsigned long * __restrict p4)
+{
+	unsigned long lines = bytes >> 6;
+
+	asm volatile(
+	" .align 32,0x90             ;\n"
+	" 1:                         ;\n"
+	"       movq   (%1), %%mm0   ;\n"
+	"       movq  8(%1), %%mm1   ;\n"
+	"       pxor   (%2), %%mm0   ;\n"
+	"       movq 16(%1), %%mm2   ;\n"
+	"       pxor  8(%2), %%mm1   ;\n"
+	"       pxor   (%3), %%mm0   ;\n"
+	"       pxor 16(%2), %%mm2   ;\n"
+	"       pxor  8(%3), %%mm1   ;\n"
+	"       pxor   (%4), %%mm0   ;\n"
+	"       movq 24(%1), %%mm3   ;\n"
+	"       pxor 16(%3), %%mm2   ;\n"
+	"       pxor  8(%4), %%mm1   ;\n"
+	"       movq %%mm0,   (%1)   ;\n"
+	"       movq 32(%1), %%mm4   ;\n"
+	"       pxor 24(%2), %%mm3   ;\n"
+	"       pxor 16(%4), %%mm2   ;\n"
+	"       movq %%mm1,  8(%1)   ;\n"
+	"       movq 40(%1), %%mm5   ;\n"
+	"       pxor 32(%2), %%mm4   ;\n"
+	"       pxor 24(%3), %%mm3   ;\n"
+	"       movq %%mm2, 16(%1)   ;\n"
+	"       pxor 40(%2), %%mm5   ;\n"
+	"       pxor 32(%3), %%mm4   ;\n"
+	"       pxor 24(%4), %%mm3   ;\n"
+	"       movq %%mm3, 24(%1)   ;\n"
+	"       movq 56(%1), %%mm7   ;\n"
+	"       movq 48(%1), %%mm6   ;\n"
+	"       pxor 40(%3), %%mm5   ;\n"
+	"       pxor 32(%4), %%mm4   ;\n"
+	"       pxor 48(%2), %%mm6   ;\n"
+	"       movq %%mm4, 32(%1)   ;\n"
+	"       pxor 56(%2), %%mm7   ;\n"
+	"       pxor 40(%4), %%mm5   ;\n"
+	"       pxor 48(%3), %%mm6   ;\n"
+	"       pxor 56(%3), %%mm7   ;\n"
+	"       movq %%mm5, 40(%1)   ;\n"
+	"       pxor 48(%4), %%mm6   ;\n"
+	"       pxor 56(%4), %%mm7   ;\n"
+	"       movq %%mm6, 48(%1)   ;\n"
+	"       movq %%mm7, 56(%1)   ;\n"
+
+	"       addl $64, %1         ;\n"
+	"       addl $64, %2         ;\n"
+	"       addl $64, %3         ;\n"
+	"       addl $64, %4         ;\n"
+	"       decl %0              ;\n"
+	"       jnz 1b               ;\n"
+	: "+r" (lines),
+	  "+r" (p1), "+r" (p2), "+r" (p3), "+r" (p4)
+	:
+	: "memory");
+}
+
+static void
+xor_p5_mmx_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)
+{
+	unsigned long lines = bytes >> 6;
+
+	/* Make sure GCC forgets anything it knows about p4 or p5,
+	   such that it won't pass to the asm volatile below a
+	   register that is shared with any other variable.  That's
+	   because we modify p4 and p5 there, but we can't mark them
+	   as read/write, otherwise we'd overflow the 10-asm-operands
+	   limit of GCC < 3.1.  */
+	asm("" : "+r" (p4), "+r" (p5));
+
+	asm volatile(
+	" .align 32,0x90             ;\n"
+	" 1:                         ;\n"
+	"       movq   (%1), %%mm0   ;\n"
+	"       movq  8(%1), %%mm1   ;\n"
+	"       pxor   (%2), %%mm0   ;\n"
+	"       pxor  8(%2), %%mm1   ;\n"
+	"       movq 16(%1), %%mm2   ;\n"
+	"       pxor   (%3), %%mm0   ;\n"
+	"       pxor  8(%3), %%mm1   ;\n"
+	"       pxor 16(%2), %%mm2   ;\n"
+	"       pxor   (%4), %%mm0   ;\n"
+	"       pxor  8(%4), %%mm1   ;\n"
+	"       pxor 16(%3), %%mm2   ;\n"
+	"       movq 24(%1), %%mm3   ;\n"
+	"       pxor   (%5), %%mm0   ;\n"
+	"       pxor  8(%5), %%mm1   ;\n"
+	"       movq %%mm0,   (%1)   ;\n"
+	"       pxor 16(%4), %%mm2   ;\n"
+	"       pxor 24(%2), %%mm3   ;\n"
+	"       movq %%mm1,  8(%1)   ;\n"
+	"       pxor 16(%5), %%mm2   ;\n"
+	"       pxor 24(%3), %%mm3   ;\n"
+	"       movq 32(%1), %%mm4   ;\n"
+	"       movq %%mm2, 16(%1)   ;\n"
+	"       pxor 24(%4), %%mm3   ;\n"
+	"       pxor 32(%2), %%mm4   ;\n"
+	"       movq 40(%1), %%mm5   ;\n"
+	"       pxor 24(%5), %%mm3   ;\n"
+	"       pxor 32(%3), %%mm4   ;\n"
+	"       pxor 40(%2), %%mm5   ;\n"
+	"       movq %%mm3, 24(%1)   ;\n"
+	"       pxor 32(%4), %%mm4   ;\n"
+	"       pxor 40(%3), %%mm5   ;\n"
+	"       movq 48(%1), %%mm6   ;\n"
+	"       movq 56(%1), %%mm7   ;\n"
+	"       pxor 32(%5), %%mm4   ;\n"
+	"       pxor 40(%4), %%mm5   ;\n"
+	"       pxor 48(%2), %%mm6   ;\n"
+	"       pxor 56(%2), %%mm7   ;\n"
+	"       movq %%mm4, 32(%1)   ;\n"
+	"       pxor 48(%3), %%mm6   ;\n"
+	"       pxor 56(%3), %%mm7   ;\n"
+	"       pxor 40(%5), %%mm5   ;\n"
+	"       pxor 48(%4), %%mm6   ;\n"
+	"       pxor 56(%4), %%mm7   ;\n"
+	"       movq %%mm5, 40(%1)   ;\n"
+	"       pxor 48(%5), %%mm6   ;\n"
+	"       pxor 56(%5), %%mm7   ;\n"
+	"       movq %%mm6, 48(%1)   ;\n"
+	"       movq %%mm7, 56(%1)   ;\n"
+
+	"       addl $64, %1         ;\n"
+	"       addl $64, %2         ;\n"
+	"       addl $64, %3         ;\n"
+	"       addl $64, %4         ;\n"
+	"       addl $64, %5         ;\n"
+	"       decl %0              ;\n"
+	"       jnz 1b               ;\n"
+	: "+r" (lines),
+	  "+r" (p1), "+r" (p2), "+r" (p3)
+	: "r" (p4), "r" (p5)
+	: "memory");
+
+	/* p4 and p5 were modified, and now the variables are dead.
+	   Clobber them just to be sure nobody does something stupid
+	   like assuming they have some legal value.  */
+	asm("" : "=r" (p4), "=r" (p5));
+}
+
+DO_XOR_BLOCKS(pII_mmx_inner, xor_pII_mmx_2, xor_pII_mmx_3, xor_pII_mmx_4,
+		xor_pII_mmx_5);
+
+static void xor_gen_pII_mmx(void *dest, void **srcs, unsigned int src_cnt,
+		unsigned int bytes)
+{
+	kernel_fpu_begin();
+	xor_gen_pII_mmx_inner(dest, srcs, src_cnt, bytes);
+	kernel_fpu_end();
+}
+
+struct xor_block_template xor_block_pII_mmx = {
+	.name		= "pII_mmx",
+	.xor_gen	= xor_gen_pII_mmx,
+};
+
+DO_XOR_BLOCKS(p5_mmx_inner, xor_p5_mmx_2, xor_p5_mmx_3, xor_p5_mmx_4,
+		xor_p5_mmx_5);
+
+static void xor_gen_p5_mmx(void *dest, void **srcs, unsigned int src_cnt,
+		unsigned int bytes)
+{
+	kernel_fpu_begin();
+	xor_gen_p5_mmx_inner(dest, srcs, src_cnt, bytes);
+	kernel_fpu_end();
+}
+
+struct xor_block_template xor_block_p5_mmx = {
+	.name		= "p5_mmx",
+	.xor_gen	= xor_gen_p5_mmx,
+};
diff --git a/lib/raid/xor/x86/xor-sse.c b/lib/raid/xor/x86/xor-sse.c
new file mode 100644
index 000000000..c6626ecae
--- /dev/null
+++ b/lib/raid/xor/x86/xor-sse.c
@@ -0,0 +1,459 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Optimized XOR parity functions for SSE.
+ *
+ * Cache avoiding checksumming functions utilizing KNI instructions
+ * Copyright (C) 1999 Zach Brown (with obvious credit due Ingo)
+ *
+ * Based on
+ * High-speed RAID5 checksumming functions utilizing SSE instructions.
+ * Copyright (C) 1998 Ingo Molnar.
+ *
+ * x86-64 changes / gcc fixes from Andi Kleen.
+ * Copyright 2002 Andi Kleen, SuSE Labs.
+ */
+#include <asm/fpu/api.h>
+#include "xor_impl.h"
+#include "xor_arch.h"
+
+#ifdef CONFIG_X86_32
+/* reduce register pressure */
+# define XOR_CONSTANT_CONSTRAINT "i"
+#else
+# define XOR_CONSTANT_CONSTRAINT "re"
+#endif
+
+#define OFFS(x)		"16*("#x")"
+#define PF_OFFS(x)	"256+16*("#x")"
+#define PF0(x)		"	prefetchnta "PF_OFFS(x)"(%[p1])		;\n"
+#define LD(x, y)	"	movaps "OFFS(x)"(%[p1]), %%xmm"#y"	;\n"
+#define ST(x, y)	"	movaps %%xmm"#y", "OFFS(x)"(%[p1])	;\n"
+#define PF1(x)		"	prefetchnta "PF_OFFS(x)"(%[p2])		;\n"
+#define PF2(x)		"	prefetchnta "PF_OFFS(x)"(%[p3])		;\n"
+#define PF3(x)		"	prefetchnta "PF_OFFS(x)"(%[p4])		;\n"
+#define PF4(x)		"	prefetchnta "PF_OFFS(x)"(%[p5])		;\n"
+#define XO1(x, y)	"	xorps "OFFS(x)"(%[p2]), %%xmm"#y"	;\n"
+#define XO2(x, y)	"	xorps "OFFS(x)"(%[p3]), %%xmm"#y"	;\n"
+#define XO3(x, y)	"	xorps "OFFS(x)"(%[p4]), %%xmm"#y"	;\n"
+#define XO4(x, y)	"	xorps "OFFS(x)"(%[p5]), %%xmm"#y"	;\n"
+#define NOP(x)
+
+#define BLK64(pf, op, i)				\
+		pf(i)					\
+		op(i, 0)				\
+			op(i + 1, 1)			\
+				op(i + 2, 2)		\
+					op(i + 3, 3)
+
+static void
+xor_sse_2(unsigned long bytes, unsigned long * __restrict p1,
+	  const unsigned long * __restrict p2)
+{
+	unsigned long lines = bytes >> 8;
+
+	asm volatile(
+#undef BLOCK
+#define BLOCK(i)					\
+		LD(i, 0)				\
+			LD(i + 1, 1)			\
+		PF1(i)					\
+				PF1(i + 2)		\
+				LD(i + 2, 2)		\
+					LD(i + 3, 3)	\
+		PF0(i + 4)				\
+				PF0(i + 6)		\
+		XO1(i, 0)				\
+			XO1(i + 1, 1)			\
+				XO1(i + 2, 2)		\
+					XO1(i + 3, 3)	\
+		ST(i, 0)				\
+			ST(i + 1, 1)			\
+				ST(i + 2, 2)		\
+					ST(i + 3, 3)	\
+
+
+		PF0(0)
+				PF0(2)
+
+	" .align 32			;\n"
+	" 1:                            ;\n"
+
+		BLOCK(0)
+		BLOCK(4)
+		BLOCK(8)
+		BLOCK(12)
+
+	"       add %[inc], %[p1]       ;\n"
+	"       add %[inc], %[p2]       ;\n"
+	"       dec %[cnt]              ;\n"
+	"       jnz 1b                  ;\n"
+	: [cnt] "+r" (lines),
+	  [p1] "+r" (p1), [p2] "+r" (p2)
+	: [inc] XOR_CONSTANT_CONSTRAINT (256UL)
+	: "memory");
+}
+
+static void
+xor_sse_2_pf64(unsigned long bytes, unsigned long * __restrict p1,
+	       const unsigned long * __restrict p2)
+{
+	unsigned long lines = bytes >> 8;
+
+	asm volatile(
+#undef BLOCK
+#define BLOCK(i)			\
+		BLK64(PF0, LD, i)	\
+		BLK64(PF1, XO1, i)	\
+		BLK64(NOP, ST, i)	\
+
+	" .align 32			;\n"
+	" 1:                            ;\n"
+
+		BLOCK(0)
+		BLOCK(4)
+		BLOCK(8)
+		BLOCK(12)
+
+	"       add %[inc], %[p1]       ;\n"
+	"       add %[inc], %[p2]       ;\n"
+	"       dec %[cnt]              ;\n"
+	"       jnz 1b                  ;\n"
+	: [cnt] "+r" (lines),
+	  [p1] "+r" (p1), [p2] "+r" (p2)
+	: [inc] XOR_CONSTANT_CONSTRAINT (256UL)
+	: "memory");
+}
+
+static void
+xor_sse_3(unsigned long bytes, unsigned long * __restrict p1,
+	  const unsigned long * __restrict p2,
+	  const unsigned long * __restrict p3)
+{
+	unsigned long lines = bytes >> 8;
+
+	asm volatile(
+#undef BLOCK
+#define BLOCK(i) \
+		PF1(i)					\
+				PF1(i + 2)		\
+		LD(i, 0)				\
+			LD(i + 1, 1)			\
+				LD(i + 2, 2)		\
+					LD(i + 3, 3)	\
+		PF2(i)					\
+				PF2(i + 2)		\
+		PF0(i + 4)				\
+				PF0(i + 6)		\
+		XO1(i, 0)				\
+			XO1(i + 1, 1)			\
+				XO1(i + 2, 2)		\
+					XO1(i + 3, 3)	\
+		XO2(i, 0)				\
+			XO2(i + 1, 1)			\
+				XO2(i + 2, 2)		\
+					XO2(i + 3, 3)	\
+		ST(i, 0)				\
+			ST(i + 1, 1)			\
+				ST(i + 2, 2)		\
+					ST(i + 3, 3)	\
+
+
+		PF0(0)
+				PF0(2)
+
+	" .align 32			;\n"
+	" 1:                            ;\n"
+
+		BLOCK(0)
+		BLOCK(4)
+		BLOCK(8)
+		BLOCK(12)
+
+	"       add %[inc], %[p1]       ;\n"
+	"       add %[inc], %[p2]       ;\n"
+	"       add %[inc], %[p3]       ;\n"
+	"       dec %[cnt]              ;\n"
+	"       jnz 1b                  ;\n"
+	: [cnt] "+r" (lines),
+	  [p1] "+r" (p1), [p2] "+r" (p2), [p3] "+r" (p3)
+	: [inc] XOR_CONSTANT_CONSTRAINT (256UL)
+	: "memory");
+}
+
+static void
+xor_sse_3_pf64(unsigned long bytes, unsigned long * __restrict p1,
+	       const unsigned long * __restrict p2,
+	       const unsigned long * __restrict p3)
+{
+	unsigned long lines = bytes >> 8;
+
+	asm volatile(
+#undef BLOCK
+#define BLOCK(i)			\
+		BLK64(PF0, LD, i)	\
+		BLK64(PF1, XO1, i)	\
+		BLK64(PF2, XO2, i)	\
+		BLK64(NOP, ST, i)	\
+
+	" .align 32			;\n"
+	" 1:                            ;\n"
+
+		BLOCK(0)
+		BLOCK(4)
+		BLOCK(8)
+		BLOCK(12)
+
+	"       add %[inc], %[p1]       ;\n"
+	"       add %[inc], %[p2]       ;\n"
+	"       add %[inc], %[p3]       ;\n"
+	"       dec %[cnt]              ;\n"
+	"       jnz 1b                  ;\n"
+	: [cnt] "+r" (lines),
+	  [p1] "+r" (p1), [p2] "+r" (p2), [p3] "+r" (p3)
+	: [inc] XOR_CONSTANT_CONSTRAINT (256UL)
+	: "memory");
+}
+
+static void
+xor_sse_4(unsigned long bytes, unsigned long * __restrict p1,
+	  const unsigned long * __restrict p2,
+	  const unsigned long * __restrict p3,
+	  const unsigned long * __restrict p4)
+{
+	unsigned long lines = bytes >> 8;
+
+	asm volatile(
+#undef BLOCK
+#define BLOCK(i) \
+		PF1(i)					\
+				PF1(i + 2)		\
+		LD(i, 0)				\
+			LD(i + 1, 1)			\
+				LD(i + 2, 2)		\
+					LD(i + 3, 3)	\
+		PF2(i)					\
+				PF2(i + 2)		\
+		XO1(i, 0)				\
+			XO1(i + 1, 1)			\
+				XO1(i + 2, 2)		\
+					XO1(i + 3, 3)	\
+		PF3(i)					\
+				PF3(i + 2)		\
+		PF0(i + 4)				\
+				PF0(i + 6)		\
+		XO2(i, 0)				\
+			XO2(i + 1, 1)			\
+				XO2(i + 2, 2)		\
+					XO2(i + 3, 3)	\
+		XO3(i, 0)				\
+			XO3(i + 1, 1)			\
+				XO3(i + 2, 2)		\
+					XO3(i + 3, 3)	\
+		ST(i, 0)				\
+			ST(i + 1, 1)			\
+				ST(i + 2, 2)		\
+					ST(i + 3, 3)	\
+
+
+		PF0(0)
+				PF0(2)
+
+	" .align 32			;\n"
+	" 1:                            ;\n"
+
+		BLOCK(0)
+		BLOCK(4)
+		BLOCK(8)
+		BLOCK(12)
+
+	"       add %[inc], %[p1]       ;\n"
+	"       add %[inc], %[p2]       ;\n"
+	"       add %[inc], %[p3]       ;\n"
+	"       add %[inc], %[p4]       ;\n"
+	"       dec %[cnt]              ;\n"
+	"       jnz 1b                  ;\n"
+	: [cnt] "+r" (lines), [p1] "+r" (p1),
+	  [p2] "+r" (p2), [p3] "+r" (p3), [p4] "+r" (p4)
+	: [inc] XOR_CONSTANT_CONSTRAINT (256UL)
+	: "memory");
+}
+
+static void
+xor_sse_4_pf64(unsigned long bytes, unsigned long * __restrict p1,
+	       const unsigned long * __restrict p2,
+	       const unsigned long * __restrict p3,
+	       const unsigned long * __restrict p4)
+{
+	unsigned long lines = bytes >> 8;
+
+	asm volatile(
+#undef BLOCK
+#define BLOCK(i)			\
+		BLK64(PF0, LD, i)	\
+		BLK64(PF1, XO1, i)	\
+		BLK64(PF2, XO2, i)	\
+		BLK64(PF3, XO3, i)	\
+		BLK64(NOP, ST, i)	\
+
+	" .align 32			;\n"
+	" 1:                            ;\n"
+
+		BLOCK(0)
+		BLOCK(4)
+		BLOCK(8)
+		BLOCK(12)
+
+	"       add %[inc], %[p1]       ;\n"
+	"       add %[inc], %[p2]       ;\n"
+	"       add %[inc], %[p3]       ;\n"
+	"       add %[inc], %[p4]       ;\n"
+	"       dec %[cnt]              ;\n"
+	"       jnz 1b                  ;\n"
+	: [cnt] "+r" (lines), [p1] "+r" (p1),
+	  [p2] "+r" (p2), [p3] "+r" (p3), [p4] "+r" (p4)
+	: [inc] XOR_CONSTANT_CONSTRAINT (256UL)
+	: "memory");
+}
+
+static void
+xor_sse_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)
+{
+	unsigned long lines = bytes >> 8;
+
+	asm volatile(
+#undef BLOCK
+#define BLOCK(i) \
+		PF1(i)					\
+				PF1(i + 2)		\
+		LD(i, 0)				\
+			LD(i + 1, 1)			\
+				LD(i + 2, 2)		\
+					LD(i + 3, 3)	\
+		PF2(i)					\
+				PF2(i + 2)		\
+		XO1(i, 0)				\
+			XO1(i + 1, 1)			\
+				XO1(i + 2, 2)		\
+					XO1(i + 3, 3)	\
+		PF3(i)					\
+				PF3(i + 2)		\
+		XO2(i, 0)				\
+			XO2(i + 1, 1)			\
+				XO2(i + 2, 2)		\
+					XO2(i + 3, 3)	\
+		PF4(i)					\
+				PF4(i + 2)		\
+		PF0(i + 4)				\
+				PF0(i + 6)		\
+		XO3(i, 0)				\
+			XO3(i + 1, 1)			\
+				XO3(i + 2, 2)		\
+					XO3(i + 3, 3)	\
+		XO4(i, 0)				\
+			XO4(i + 1, 1)			\
+				XO4(i + 2, 2)		\
+					XO4(i + 3, 3)	\
+		ST(i, 0)				\
+			ST(i + 1, 1)			\
+				ST(i + 2, 2)		\
+					ST(i + 3, 3)	\
+
+
+		PF0(0)
+				PF0(2)
+
+	" .align 32			;\n"
+	" 1:                            ;\n"
+
+		BLOCK(0)
+		BLOCK(4)
+		BLOCK(8)
+		BLOCK(12)
+
+	"       add %[inc], %[p1]       ;\n"
+	"       add %[inc], %[p2]       ;\n"
+	"       add %[inc], %[p3]       ;\n"
+	"       add %[inc], %[p4]       ;\n"
+	"       add %[inc], %[p5]       ;\n"
+	"       dec %[cnt]              ;\n"
+	"       jnz 1b                  ;\n"
+	: [cnt] "+r" (lines), [p1] "+r" (p1), [p2] "+r" (p2),
+	  [p3] "+r" (p3), [p4] "+r" (p4), [p5] "+r" (p5)
+	: [inc] XOR_CONSTANT_CONSTRAINT (256UL)
+	: "memory");
+}
+
+static void
+xor_sse_5_pf64(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)
+{
+	unsigned long lines = bytes >> 8;
+
+	asm volatile(
+#undef BLOCK
+#define BLOCK(i)			\
+		BLK64(PF0, LD, i)	\
+		BLK64(PF1, XO1, i)	\
+		BLK64(PF2, XO2, i)	\
+		BLK64(PF3, XO3, i)	\
+		BLK64(PF4, XO4, i)	\
+		BLK64(NOP, ST, i)	\
+
+	" .align 32			;\n"
+	" 1:                            ;\n"
+
+		BLOCK(0)
+		BLOCK(4)
+		BLOCK(8)
+		BLOCK(12)
+
+	"       add %[inc], %[p1]       ;\n"
+	"       add %[inc], %[p2]       ;\n"
+	"       add %[inc], %[p3]       ;\n"
+	"       add %[inc], %[p4]       ;\n"
+	"       add %[inc], %[p5]       ;\n"
+	"       dec %[cnt]              ;\n"
+	"       jnz 1b                  ;\n"
+	: [cnt] "+r" (lines), [p1] "+r" (p1), [p2] "+r" (p2),
+	  [p3] "+r" (p3), [p4] "+r" (p4), [p5] "+r" (p5)
+	: [inc] XOR_CONSTANT_CONSTRAINT (256UL)
+	: "memory");
+}
+
+DO_XOR_BLOCKS(sse_inner, xor_sse_2, xor_sse_3, xor_sse_4, xor_sse_5);
+
+static void xor_gen_sse(void *dest, void **srcs, unsigned int src_cnt,
+			unsigned int bytes)
+{
+	kernel_fpu_begin();
+	xor_gen_sse_inner(dest, srcs, src_cnt, bytes);
+	kernel_fpu_end();
+}
+
+struct xor_block_template xor_block_sse = {
+	.name		= "sse",
+	.xor_gen	= xor_gen_sse,
+};
+
+DO_XOR_BLOCKS(sse_pf64_inner, xor_sse_2_pf64, xor_sse_3_pf64, xor_sse_4_pf64,
+		xor_sse_5_pf64);
+
+static void xor_gen_sse_pf64(void *dest, void **srcs, unsigned int src_cnt,
+			unsigned int bytes)
+{
+	kernel_fpu_begin();
+	xor_gen_sse_pf64_inner(dest, srcs, src_cnt, bytes);
+	kernel_fpu_end();
+}
+
+struct xor_block_template xor_block_sse_pf64 = {
+	.name		= "prefetch64-sse",
+	.xor_gen	= xor_gen_sse_pf64,
+};
diff --git a/lib/raid/xor/x86/xor_arch.h b/lib/raid/xor/x86/xor_arch.h
new file mode 100644
index 000000000..99fe85a21
--- /dev/null
+++ b/lib/raid/xor/x86/xor_arch.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#include <asm/cpufeature.h>
+
+extern struct xor_block_template xor_block_pII_mmx;
+extern struct xor_block_template xor_block_p5_mmx;
+extern struct xor_block_template xor_block_sse;
+extern struct xor_block_template xor_block_sse_pf64;
+extern struct xor_block_template xor_block_avx;
+
+/*
+ * When SSE is available, use it as it can write around L2.  We may also be able
+ * to load into the L1 only depending on how the cpu deals with a load to a line
+ * that is being prefetched.
+ *
+ * When AVX2 is available, force using it as it is better by all measures.
+ *
+ * 32-bit without MMX can fall back to the generic routines.
+ */
+static __always_inline void __init arch_xor_init(void)
+{
+	if (boot_cpu_has(X86_FEATURE_AVX) &&
+	    boot_cpu_has(X86_FEATURE_OSXSAVE)) {
+		xor_force(&xor_block_avx);
+	} else if (IS_ENABLED(CONFIG_X86_64) || boot_cpu_has(X86_FEATURE_XMM)) {
+		xor_register(&xor_block_sse);
+		xor_register(&xor_block_sse_pf64);
+	} else if (boot_cpu_has(X86_FEATURE_MMX)) {
+		xor_register(&xor_block_pII_mmx);
+		xor_register(&xor_block_p5_mmx);
+	} else {
+		xor_register(&xor_block_8regs);
+		xor_register(&xor_block_8regs_p);
+		xor_register(&xor_block_32regs);
+		xor_register(&xor_block_32regs_p);
+	}
+}
diff --git a/lib/raid/xor/xor-32regs-prefetch.c b/lib/raid/xor/xor-32regs-prefetch.c
new file mode 100644
index 000000000..ade2a7d8c
--- /dev/null
+++ b/lib/raid/xor/xor-32regs-prefetch.c
@@ -0,0 +1,267 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include <linux/prefetch.h>
+#include "xor_impl.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;
+}
+
+DO_XOR_BLOCKS(32regs_p, xor_32regs_p_2, xor_32regs_p_3, xor_32regs_p_4,
+		xor_32regs_p_5);
+
+struct xor_block_template xor_block_32regs_p = {
+	.name		= "32regs_prefetch",
+	.xor_gen	= xor_gen_32regs_p,
+};
diff --git a/lib/raid/xor/xor-32regs.c b/lib/raid/xor/xor-32regs.c
new file mode 100644
index 000000000..acb4a10d1
--- /dev/null
+++ b/lib/raid/xor/xor-32regs.c
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "xor_impl.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);
+}
+
+DO_XOR_BLOCKS(32regs, xor_32regs_2, xor_32regs_3, xor_32regs_4, xor_32regs_5);
+
+struct xor_block_template xor_block_32regs = {
+	.name		= "32regs",
+	.xor_gen	= xor_gen_32regs,
+};
diff --git a/lib/raid/xor/xor-8regs-prefetch.c b/lib/raid/xor/xor-8regs-prefetch.c
new file mode 100644
index 000000000..451527a95
--- /dev/null
+++ b/lib/raid/xor/xor-8regs-prefetch.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include <linux/prefetch.h>
+#include "xor_impl.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;
+}
+
+
+DO_XOR_BLOCKS(8regs_p, xor_8regs_p_2, xor_8regs_p_3, xor_8regs_p_4,
+		xor_8regs_p_5);
+
+struct xor_block_template xor_block_8regs_p = {
+	.name		= "8regs_prefetch",
+	.xor_gen	= xor_gen_8regs_p,
+};
diff --git a/lib/raid/xor/xor-8regs.c b/lib/raid/xor/xor-8regs.c
new file mode 100644
index 000000000..1edaed8ac
--- /dev/null
+++ b/lib/raid/xor/xor-8regs.c
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "xor_impl.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
+DO_XOR_BLOCKS(8regs, xor_8regs_2, xor_8regs_3, xor_8regs_4, xor_8regs_5);
+
+struct xor_block_template xor_block_8regs = {
+	.name		= "8regs",
+	.xor_gen	= xor_gen_8regs,
+};
+#endif /* NO_TEMPLATE */
diff --git a/lib/raid/xor/xor-core.c b/lib/raid/xor/xor-core.c
new file mode 100644
index 000000000..bd4e6e434
--- /dev/null
+++ b/lib/raid/xor/xor-core.c
@@ -0,0 +1,193 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000,
+ * Ingo Molnar, Matti Aarnio, Jakub Jelinek, Richard Henderson.
+ *
+ * Dispatch optimized XOR parity functions.
+ */
+
+#include <linux/module.h>
+#include <linux/gfp.h>
+#include <linux/raid/xor.h>
+#include <linux/jiffies.h>
+#include <linux/preempt.h>
+#include <linux/static_call.h>
+#include "xor_impl.h"
+
+DEFINE_STATIC_CALL_NULL(xor_gen_impl, *xor_block_8regs.xor_gen);
+
+/**
+ * xor_gen - generate RAID-style XOR information
+ * @dest:	destination vector
+ * @srcs:	source vectors
+ * @src_cnt:	number of source vectors
+ * @bytes:	length in bytes of each vector
+ *
+ * Performs bit-wise XOR operation into @dest for each of the @src_cnt vectors
+ * in @srcs for a length of @bytes bytes.  @src_cnt must be non-zero, and the
+ * memory pointed to by @dest and each member of @srcs must be at least 64-byte
+ * aligned.  @bytes must be non-zero and a multiple of 512.
+ *
+ * Note: for typical RAID uses, @dest either needs to be zeroed, or filled with
+ * the first disk, which then needs to be removed from @srcs.
+ */
+void xor_gen(void *dest, void **srcs, unsigned int src_cnt, unsigned int bytes)
+{
+	WARN_ON_ONCE(!in_task() || irqs_disabled() || softirq_count());
+	WARN_ON_ONCE(bytes == 0);
+	WARN_ON_ONCE(bytes & 511);
+
+	static_call(xor_gen_impl)(dest, srcs, src_cnt, bytes);
+}
+EXPORT_SYMBOL(xor_gen);
+
+/* Set of all registered templates.  */
+static struct xor_block_template *__initdata template_list;
+static struct xor_block_template *forced_template;
+
+/**
+ * xor_register - register a XOR template
+ * @tmpl:	template to register
+ *
+ * Register a XOR implementation with the core.  Registered implementations
+ * will be measured by a trivial benchmark, and the fastest one is chosen
+ * unless an implementation is forced using xor_force().
+ */
+void __init xor_register(struct xor_block_template *tmpl)
+{
+	tmpl->next = template_list;
+	template_list = tmpl;
+}
+
+/**
+ * xor_force - force use of a XOR template
+ * @tmpl:	template to register
+ *
+ * Register a XOR implementation with the core and force using it.  Forcing
+ * an implementation will make the core ignore any template registered using
+ * xor_register(), or any previous implementation forced using xor_force().
+ */
+void __init xor_force(struct xor_block_template *tmpl)
+{
+	forced_template = tmpl;
+}
+
+#define BENCH_SIZE	4096
+#define REPS		800U
+
+static void __init
+do_xor_speed(struct xor_block_template *tmpl, void *b1, void *b2)
+{
+	int speed;
+	unsigned long reps;
+	ktime_t min, start, t0;
+	void *srcs[1] = { b2 };
+
+	preempt_disable();
+
+	reps = 0;
+	t0 = ktime_get();
+	/* delay start until time has advanced */
+	while ((start = ktime_get()) == t0)
+		cpu_relax();
+	do {
+		mb(); /* prevent loop optimization */
+		tmpl->xor_gen(b1, srcs, 1, BENCH_SIZE);
+		mb();
+	} while (reps++ < REPS || (t0 = ktime_get()) == start);
+	min = ktime_sub(t0, start);
+
+	preempt_enable();
+
+	// bytes/ns == GB/s, multiply by 1000 to get MB/s [not MiB/s]
+	speed = (1000 * reps * BENCH_SIZE) / (unsigned int)ktime_to_ns(min);
+	tmpl->speed = speed;
+
+	pr_info("   %-16s: %5d MB/sec\n", tmpl->name, speed);
+}
+
+static int __init calibrate_xor_blocks(void)
+{
+	void *b1, *b2;
+	struct xor_block_template *f, *fastest;
+
+	if (forced_template)
+		return 0;
+
+	b1 = (void *) __get_free_pages(GFP_KERNEL, 2);
+	if (!b1) {
+		pr_warn("xor: Yikes!  No memory available.\n");
+		return -ENOMEM;
+	}
+	b2 = b1 + 2*PAGE_SIZE + BENCH_SIZE;
+
+	pr_info("xor: measuring software checksum speed\n");
+	fastest = template_list;
+	for (f = template_list; f; f = f->next) {
+		do_xor_speed(f, b1, b2);
+		if (f->speed > fastest->speed)
+			fastest = f;
+	}
+	static_call_update(xor_gen_impl, fastest->xor_gen);
+	pr_info("xor: using function: %s (%d MB/sec)\n",
+	       fastest->name, fastest->speed);
+
+	free_pages((unsigned long)b1, 2);
+	return 0;
+}
+
+#ifdef CONFIG_XOR_BLOCKS_ARCH
+#include "xor_arch.h" /* $SRCARCH/xor_arch.h */
+#else
+static void __init arch_xor_init(void)
+{
+	xor_register(&xor_block_8regs);
+	xor_register(&xor_block_8regs_p);
+	xor_register(&xor_block_32regs);
+	xor_register(&xor_block_32regs_p);
+}
+#endif /* CONFIG_XOR_BLOCKS_ARCH */
+
+static int __init xor_init(void)
+{
+	arch_xor_init();
+
+	/*
+	 * If this arch/cpu has a short-circuited selection, don't loop through
+	 * all the possible functions, just use the best one.
+	 */
+	if (forced_template) {
+		pr_info("xor: automatically using best checksumming function   %-10s\n",
+			forced_template->name);
+		static_call_update(xor_gen_impl, forced_template->xor_gen);
+		return 0;
+	}
+
+#ifdef MODULE
+	return calibrate_xor_blocks();
+#else
+	/*
+	 * Pick the first template as the temporary default until calibration
+	 * happens.
+	 */
+	static_call_update(xor_gen_impl, template_list->xor_gen);
+	return 0;
+#endif
+}
+
+static __exit void xor_exit(void)
+{
+}
+
+MODULE_DESCRIPTION("RAID-5 checksumming functions");
+MODULE_LICENSE("GPL");
+
+/*
+ * When built-in we must register the default template before md, but we don't
+ * want calibration to run that early as that would delay the boot process.
+ */
+#ifndef MODULE
+__initcall(calibrate_xor_blocks);
+#endif
+core_initcall(xor_init);
+module_exit(xor_exit);
diff --git a/lib/raid/xor/xor_impl.h b/lib/raid/xor/xor_impl.h
new file mode 100644
index 000000000..09ae2916f
--- /dev/null
+++ b/lib/raid/xor/xor_impl.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _XOR_IMPL_H
+#define _XOR_IMPL_H
+
+#include <linux/init.h>
+#include <linux/minmax.h>
+
+struct xor_block_template {
+	struct xor_block_template *next;
+	const char *name;
+	int speed;
+	void (*xor_gen)(void *dest, void **srcs, unsigned int src_cnt,
+			unsigned int bytes);
+};
+
+#define __DO_XOR_BLOCKS(_name, _handle1, _handle2, _handle3, _handle4)	\
+void								\
+xor_gen_##_name(void *dest, void **srcs, unsigned int src_cnt,		\
+		unsigned int bytes)					\
+{									\
+	unsigned int src_off = 0;					\
+									\
+	while (src_cnt > 0) {						\
+		unsigned int this_cnt = min(src_cnt, 4);		\
+									\
+		if (this_cnt == 1)					\
+			_handle1(bytes, dest, srcs[src_off]);		\
+		else if (this_cnt == 2)					\
+			_handle2(bytes, dest, srcs[src_off],		\
+				srcs[src_off + 1]);			\
+		else if (this_cnt == 3)					\
+			_handle3(bytes, dest, srcs[src_off],		\
+				srcs[src_off + 1], srcs[src_off + 2]);	\
+		else							\
+			_handle4(bytes, dest, srcs[src_off],		\
+				srcs[src_off + 1], srcs[src_off + 2],	\
+				srcs[src_off + 3]);			\
+									\
+		src_cnt -= this_cnt;					\
+		src_off += this_cnt;					\
+	}								\
+}
+
+#define DO_XOR_BLOCKS(_name, _handle1, _handle2, _handle3, _handle4)	\
+	static __DO_XOR_BLOCKS(_name, _handle1, _handle2, _handle3, _handle4)
+
+/* generic implementations */
+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;
+
+void __init xor_register(struct xor_block_template *tmpl);
+void __init xor_force(struct xor_block_template *tmpl);
+
+#endif /* _XOR_IMPL_H */