[PATCH 13/27] loongarch: move the XOR code to lib/raid/

Christoph Hellwig
2026-03-11T07:07:44Z

Move the optimized XOR into lib/raid and include it it in xor.ko
instead of always building it into the main kernel image.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/loongarch/include/asm/xor.h | 24 ++----------
arch/loongarch/include/asm/xor_simd.h | 34 ----------------
arch/loongarch/lib/Makefile | 2 -
lib/raid/xor/Makefile | 2 +
.../lib => lib/raid/xor/loongarch}/xor_simd.c | 0
.../lib => lib/raid/xor/loongarch}/xor_simd.h | 0
.../raid/xor/loongarch}/xor_simd_glue.c | 39 +++++++++++--------
.../raid/xor/loongarch}/xor_template.c | 0
8 files changed, 27 insertions(+), 74 deletions(-)
delete mode 100644 arch/loongarch/include/asm/xor_simd.h
rename {arch/loongarch/lib => lib/raid/xor/loongarch}/xor_simd.c (100%)
rename {arch/loongarch/lib => lib/raid/xor/loongarch}/xor_simd.h (100%)
rename {arch/loongarch/lib => lib/raid/xor/loongarch}/xor_simd_glue.c (64%)
rename {arch/loongarch/lib => lib/raid/xor/loongarch}/xor_template.c (100%)

diff --git a/arch/loongarch/include/asm/xor.h b/arch/loongarch/include/asm/xor.h
index d17c0e3b047f..7e32f72f8b03 100644
--- a/arch/loongarch/include/asm/xor.h
+++ b/arch/loongarch/include/asm/xor.h
@@ -6,27 +6,6 @@
#define _ASM_LOONGARCH_XOR_H

#include <asm/cpu-features.h>
-#include <asm/xor_simd.h>
-
-#ifdef CONFIG_CPU_HAS_LSX
-static struct xor_block_template xor_block_lsx = {
- .name = "lsx",
- .do_2 = xor_lsx_2,
- .do_3 = xor_lsx_3,
- .do_4 = xor_lsx_4,
- .do_5 = xor_lsx_5,
-};
-#endif /* CONFIG_CPU_HAS_LSX */
-
-#ifdef CONFIG_CPU_HAS_LASX
-static struct xor_block_template xor_block_lasx = {
- .name = "lasx",
- .do_2 = xor_lasx_2,
- .do_3 = xor_lasx_3,
- .do_4 = xor_lasx_4,
- .do_5 = xor_lasx_5,
-};
-#endif /* CONFIG_CPU_HAS_LASX */

/*
* For grins, also test the generic routines.
@@ -38,6 +17,9 @@ static struct xor_block_template xor_block_lasx = {
*/
#include <asm-generic/xor.h>

+extern struct xor_block_template xor_block_lsx;
+extern struct xor_block_template xor_block_lasx;
+
#define arch_xor_init arch_xor_init
static __always_inline void __init arch_xor_init(void)
{
diff --git a/arch/loongarch/include/asm/xor_simd.h b/arch/loongarch/include/asm/xor_simd.h
deleted file mode 100644
index 471b96332f38..000000000000
--- a/arch/loongarch/include/asm/xor_simd.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * Copyright (C) 2023 WANG Xuerui <git@xen0n.name>
- */
-#ifndef _ASM_LOONGARCH_XOR_SIMD_H
-#define _ASM_LOONGARCH_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 /* _ASM_LOONGARCH_XOR_SIMD_H */
diff --git a/arch/loongarch/lib/Makefile b/arch/loongarch/lib/Makefile
index ccea3bbd4353..827a88529a42 100644
--- a/arch/loongarch/lib/Makefile
+++ b/arch/loongarch/lib/Makefile
@@ -8,6 +8,4 @@ lib-y += delay.o memset.o memcpy.o memmove.o \

obj-$(CONFIG_ARCH_SUPPORTS_INT128) += tishift.o

-obj-$(CONFIG_CPU_HAS_LSX) += xor_simd.o xor_simd_glue.o
-
obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o
diff --git a/lib/raid/xor/Makefile b/lib/raid/xor/Makefile
index 3c13851219e5..fafd131cef27 100644
--- a/lib/raid/xor/Makefile
+++ b/lib/raid/xor/Makefile
@@ -15,6 +15,8 @@ xor-$(CONFIG_KERNEL_MODE_NEON) += arm/xor-neon.o arm/xor-neon-glue.o
else
xor-$(CONFIG_KERNEL_MODE_NEON) += arm64/xor-neon.o arm64/xor-neon-glue.o
endif
+xor-$(CONFIG_CPU_HAS_LSX) += loongarch/xor_simd.o
+xor-$(CONFIG_CPU_HAS_LSX) += loongarch/xor_simd_glue.o

CFLAGS_arm/xor-neon.o += $(CC_FLAGS_FPU)
diff --git a/arch/loongarch/lib/xor_simd.c b/lib/raid/xor/loongarch/xor_simd.c
similarity index 100%
rename from arch/loongarch/lib/xor_simd.c
rename to lib/raid/xor/loongarch/xor_simd.c
diff --git a/arch/loongarch/lib/xor_simd.h b/lib/raid/xor/loongarch/xor_simd.h
similarity index 100%
rename from arch/loongarch/lib/xor_simd.h
rename to lib/raid/xor/loongarch/xor_simd.h
diff --git a/arch/loongarch/lib/xor_simd_glue.c b/lib/raid/xor/loongarch/xor_simd_glue.c
similarity index 64%
rename from arch/loongarch/lib/xor_simd_glue.c
rename to lib/raid/xor/loongarch/xor_simd_glue.c
index 393f689dbcf6..11fa3b47ba83 100644
--- a/arch/loongarch/lib/xor_simd_glue.c
+++ b/lib/raid/xor/loongarch/xor_simd_glue.c
@@ -5,24 +5,23 @@
* Copyright (C) 2023 WANG Xuerui <git@xen0n.name>
*/

-#include <linux/export.h>
#include <linux/sched.h>
+#include <linux/raid/xor_impl.h>
#include <asm/fpu.h>
-#include <asm/xor_simd.h>
+#include <asm/xor.h>
#include "xor_simd.h"

#define MAKE_XOR_GLUE_2(flavor) \
-void xor_##flavor##_2(unsigned long bytes, unsigned long * __restrict p1, \
+static void xor_##flavor##_2(unsigned long bytes, unsigned long * __restrict p1,\
const unsigned long * __restrict p2) \
{ \
kernel_fpu_begin(); \
__xor_##flavor##_2(bytes, p1, p2); \
kernel_fpu_end(); \
} \
-EXPORT_SYMBOL_GPL(xor_##flavor##_2)

#define MAKE_XOR_GLUE_3(flavor) \
-void xor_##flavor##_3(unsigned long bytes, unsigned long * __restrict p1, \
+static void xor_##flavor##_3(unsigned long bytes, unsigned long * __restrict p1,\
const unsigned long * __restrict p2, \
const unsigned long * __restrict p3) \
{ \
@@ -30,10 +29,9 @@ void xor_##flavor##_3(unsigned long bytes, unsigned long * __restrict p1, \
__xor_##flavor##_3(bytes, p1, p2, p3); \
kernel_fpu_end(); \
} \
-EXPORT_SYMBOL_GPL(xor_##flavor##_3)

#define MAKE_XOR_GLUE_4(flavor) \
-void xor_##flavor##_4(unsigned long bytes, unsigned long * __restrict p1, \
+static void xor_##flavor##_4(unsigned long bytes, unsigned long * __restrict p1,\
const unsigned long * __restrict p2, \
const unsigned long * __restrict p3, \
const unsigned long * __restrict p4) \
@@ -42,10 +40,9 @@ void xor_##flavor##_4(unsigned long bytes, unsigned long * __restrict p1, \
__xor_##flavor##_4(bytes, p1, p2, p3, p4); \
kernel_fpu_end(); \
} \
-EXPORT_SYMBOL_GPL(xor_##flavor##_4)

#define MAKE_XOR_GLUE_5(flavor) \
-void xor_##flavor##_5(unsigned long bytes, unsigned long * __restrict p1, \
+static void xor_##flavor##_5(unsigned long bytes, unsigned long * __restrict p1,\
const unsigned long * __restrict p2, \
const unsigned long * __restrict p3, \
const unsigned long * __restrict p4, \
@@ -55,18 +52,26 @@ void xor_##flavor##_5(unsigned long bytes, unsigned long * __restrict p1, \
__xor_##flavor##_5(bytes, p1, p2, p3, p4, p5); \
kernel_fpu_end(); \
} \
-EXPORT_SYMBOL_GPL(xor_##flavor##_5)

-#define MAKE_XOR_GLUES(flavor) \
- MAKE_XOR_GLUE_2(flavor); \
- MAKE_XOR_GLUE_3(flavor); \
- MAKE_XOR_GLUE_4(flavor); \
- MAKE_XOR_GLUE_5(flavor)
+#define MAKE_XOR_GLUES(flavor) \
+ MAKE_XOR_GLUE_2(flavor); \
+ MAKE_XOR_GLUE_3(flavor); \
+ MAKE_XOR_GLUE_4(flavor); \
+ MAKE_XOR_GLUE_5(flavor); \
+ \
+struct xor_block_template xor_block_##flavor = { \
+ .name = __stringify(flavor), \
+ .do_2 = xor_##flavor##_2, \
+ .do_3 = xor_##flavor##_3, \
+ .do_4 = xor_##flavor##_4, \
+ .do_5 = xor_##flavor##_5, \
+}
+

#ifdef CONFIG_CPU_HAS_LSX
MAKE_XOR_GLUES(lsx);
-#endif
+#endif /* CONFIG_CPU_HAS_LSX */

#ifdef CONFIG_CPU_HAS_LASX
MAKE_XOR_GLUES(lasx);
-#endif
+#endif /* CONFIG_CPU_HAS_LASX */
diff --git a/arch/loongarch/lib/xor_template.c b/lib/raid/xor/loongarch/xor_template.c
similarity index 100%
rename from arch/loongarch/lib/xor_template.c
rename to lib/raid/xor/loongarch/xor_template.c