diff options
| author | Huacai Chen <chenhuacai@loongson.cn> | 2025-12-08 18:09:17 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2025-12-08 18:09:17 +0800 |
| commit | 48c7294775be0f17ffd8a7d5ef0df3ab5e696ab4 (patch) | |
| tree | 935a77c27b3f63d5b93f60ed2d9e13704b94c034 /arch/loongarch/lib | |
| parent | 14338e631afd6d4b2c2f8fb7deba786d86c40fad (diff) | |
LoongArch: Adjust user accessors for 32BIT/64BIT
Adjust user accessors for both 32BIT and 64BIT, including: get_user(),
put_user(), copy_user(), clear_user(), etc.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/lib')
| -rw-r--r-- | arch/loongarch/lib/clear_user.S | 22 | ||||
| -rw-r--r-- | arch/loongarch/lib/copy_user.S | 28 |
2 files changed, 31 insertions, 19 deletions
diff --git a/arch/loongarch/lib/clear_user.S b/arch/loongarch/lib/clear_user.S index 7a0db643b286..58c667dde882 100644 --- a/arch/loongarch/lib/clear_user.S +++ b/arch/loongarch/lib/clear_user.S @@ -13,11 +13,15 @@ #include <asm/unwind_hints.h> SYM_FUNC_START(__clear_user) +#ifdef CONFIG_32BIT + b __clear_user_generic +#else /* * Some CPUs support hardware unaligned access */ ALTERNATIVE "b __clear_user_generic", \ "b __clear_user_fast", CPU_FEATURE_UAL +#endif SYM_FUNC_END(__clear_user) EXPORT_SYMBOL(__clear_user) @@ -29,19 +33,20 @@ EXPORT_SYMBOL(__clear_user) * a1: size */ SYM_FUNC_START(__clear_user_generic) - beqz a1, 2f + beqz a1, 2f -1: st.b zero, a0, 0 - addi.d a0, a0, 1 - addi.d a1, a1, -1 - bgtz a1, 1b +1: st.b zero, a0, 0 + PTR_ADDI a0, a0, 1 + PTR_ADDI a1, a1, -1 + bgtz a1, 1b -2: move a0, a1 - jr ra +2: move a0, a1 + jr ra - _asm_extable 1b, 2b + _asm_extable 1b, 2b SYM_FUNC_END(__clear_user_generic) +#ifdef CONFIG_64BIT /* * unsigned long __clear_user_fast(void *addr, unsigned long size) * @@ -207,3 +212,4 @@ SYM_FUNC_START(__clear_user_fast) SYM_FUNC_END(__clear_user_fast) STACK_FRAME_NON_STANDARD __clear_user_fast +#endif diff --git a/arch/loongarch/lib/copy_user.S b/arch/loongarch/lib/copy_user.S index 095ce9181c6c..c7264b779f6e 100644 --- a/arch/loongarch/lib/copy_user.S +++ b/arch/loongarch/lib/copy_user.S @@ -13,11 +13,15 @@ #include <asm/unwind_hints.h> SYM_FUNC_START(__copy_user) +#ifdef CONFIG_32BIT + b __copy_user_generic +#else /* * Some CPUs support hardware unaligned access */ ALTERNATIVE "b __copy_user_generic", \ "b __copy_user_fast", CPU_FEATURE_UAL +#endif SYM_FUNC_END(__copy_user) EXPORT_SYMBOL(__copy_user) @@ -30,22 +34,23 @@ EXPORT_SYMBOL(__copy_user) * a2: n */ SYM_FUNC_START(__copy_user_generic) - beqz a2, 3f + beqz a2, 3f -1: ld.b t0, a1, 0 -2: st.b t0, a0, 0 - addi.d a0, a0, 1 - addi.d a1, a1, 1 - addi.d a2, a2, -1 - bgtz a2, 1b +1: ld.b t0, a1, 0 +2: st.b t0, a0, 0 + PTR_ADDI a0, a0, 1 + PTR_ADDI a1, a1, 1 + PTR_ADDI a2, a2, -1 + bgtz a2, 1b -3: move a0, a2 - jr ra +3: move a0, a2 + jr ra - _asm_extable 1b, 3b - _asm_extable 2b, 3b + _asm_extable 1b, 3b + _asm_extable 2b, 3b SYM_FUNC_END(__copy_user_generic) +#ifdef CONFIG_64BIT /* * unsigned long __copy_user_fast(void *to, const void *from, unsigned long n) * @@ -281,3 +286,4 @@ SYM_FUNC_START(__copy_user_fast) SYM_FUNC_END(__copy_user_fast) STACK_FRAME_NON_STANDARD __copy_user_fast +#endif |