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mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-09-04 20:19:47 +08:00

LoongArch: Handle fp, lsx, lasx and lbt assembly symbols

Like the other relevant symbols, export some fp, lsx, lasx and lbt
assembly symbols and put the function declarations in header files
rather than source files.

While at it, use "asmlinkage" for the other existing C prototypes
of assembly functions and also do not use the "extern" keyword with
function declarations according to the document coding-style.rst.

Cc: stable@vger.kernel.org # 6.6+
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Tiezhu Yang 2025-04-24 20:15:41 +08:00 committed by Huacai Chen
parent cc73cc6bcd
commit 2ef174b133
5 changed files with 37 additions and 37 deletions

View File

@ -22,22 +22,29 @@
struct sigcontext;
#define kernel_fpu_available() cpu_has_fpu
extern void kernel_fpu_begin(void);
extern void kernel_fpu_end(void);
extern void _init_fpu(unsigned int);
extern void _save_fp(struct loongarch_fpu *);
extern void _restore_fp(struct loongarch_fpu *);
void kernel_fpu_begin(void);
void kernel_fpu_end(void);
extern void _save_lsx(struct loongarch_fpu *fpu);
extern void _restore_lsx(struct loongarch_fpu *fpu);
extern void _init_lsx_upper(void);
extern void _restore_lsx_upper(struct loongarch_fpu *fpu);
asmlinkage void _init_fpu(unsigned int);
asmlinkage void _save_fp(struct loongarch_fpu *);
asmlinkage void _restore_fp(struct loongarch_fpu *);
asmlinkage int _save_fp_context(void __user *fpregs, void __user *fcc, void __user *csr);
asmlinkage int _restore_fp_context(void __user *fpregs, void __user *fcc, void __user *csr);
extern void _save_lasx(struct loongarch_fpu *fpu);
extern void _restore_lasx(struct loongarch_fpu *fpu);
extern void _init_lasx_upper(void);
extern void _restore_lasx_upper(struct loongarch_fpu *fpu);
asmlinkage void _save_lsx(struct loongarch_fpu *fpu);
asmlinkage void _restore_lsx(struct loongarch_fpu *fpu);
asmlinkage void _init_lsx_upper(void);
asmlinkage void _restore_lsx_upper(struct loongarch_fpu *fpu);
asmlinkage int _save_lsx_context(void __user *fpregs, void __user *fcc, void __user *fcsr);
asmlinkage int _restore_lsx_context(void __user *fpregs, void __user *fcc, void __user *fcsr);
asmlinkage void _save_lasx(struct loongarch_fpu *fpu);
asmlinkage void _restore_lasx(struct loongarch_fpu *fpu);
asmlinkage void _init_lasx_upper(void);
asmlinkage void _restore_lasx_upper(struct loongarch_fpu *fpu);
asmlinkage int _save_lasx_context(void __user *fpregs, void __user *fcc, void __user *fcsr);
asmlinkage int _restore_lasx_context(void __user *fpregs, void __user *fcc, void __user *fcsr);
static inline void enable_lsx(void);
static inline void disable_lsx(void);

View File

@ -12,9 +12,13 @@
#include <asm/loongarch.h>
#include <asm/processor.h>
extern void _init_lbt(void);
extern void _save_lbt(struct loongarch_lbt *);
extern void _restore_lbt(struct loongarch_lbt *);
asmlinkage void _init_lbt(void);
asmlinkage void _save_lbt(struct loongarch_lbt *);
asmlinkage void _restore_lbt(struct loongarch_lbt *);
asmlinkage int _save_lbt_context(void __user *regs, void __user *eflags);
asmlinkage int _restore_lbt_context(void __user *regs, void __user *eflags);
asmlinkage int _save_ftop_context(void __user *ftop);
asmlinkage int _restore_ftop_context(void __user *ftop);
static inline int is_lbt_enabled(void)
{

View File

@ -458,6 +458,7 @@ SYM_FUNC_START(_save_fp_context)
li.w a0, 0 # success
jr ra
SYM_FUNC_END(_save_fp_context)
EXPORT_SYMBOL_GPL(_save_fp_context)
/*
* a0: fpregs
@ -471,6 +472,7 @@ SYM_FUNC_START(_restore_fp_context)
li.w a0, 0 # success
jr ra
SYM_FUNC_END(_restore_fp_context)
EXPORT_SYMBOL_GPL(_restore_fp_context)
/*
* a0: fpregs
@ -484,6 +486,7 @@ SYM_FUNC_START(_save_lsx_context)
li.w a0, 0 # success
jr ra
SYM_FUNC_END(_save_lsx_context)
EXPORT_SYMBOL_GPL(_save_lsx_context)
/*
* a0: fpregs
@ -497,6 +500,7 @@ SYM_FUNC_START(_restore_lsx_context)
li.w a0, 0 # success
jr ra
SYM_FUNC_END(_restore_lsx_context)
EXPORT_SYMBOL_GPL(_restore_lsx_context)
/*
* a0: fpregs
@ -510,6 +514,7 @@ SYM_FUNC_START(_save_lasx_context)
li.w a0, 0 # success
jr ra
SYM_FUNC_END(_save_lasx_context)
EXPORT_SYMBOL_GPL(_save_lasx_context)
/*
* a0: fpregs
@ -523,6 +528,7 @@ SYM_FUNC_START(_restore_lasx_context)
li.w a0, 0 # success
jr ra
SYM_FUNC_END(_restore_lasx_context)
EXPORT_SYMBOL_GPL(_restore_lasx_context)
.L_fpu_fault:
li.w a0, -EFAULT # failure

View File

@ -90,6 +90,7 @@ SYM_FUNC_START(_save_lbt_context)
li.w a0, 0 # success
jr ra
SYM_FUNC_END(_save_lbt_context)
EXPORT_SYMBOL_GPL(_save_lbt_context)
/*
* a0: scr
@ -110,6 +111,7 @@ SYM_FUNC_START(_restore_lbt_context)
li.w a0, 0 # success
jr ra
SYM_FUNC_END(_restore_lbt_context)
EXPORT_SYMBOL_GPL(_restore_lbt_context)
/*
* a0: ftop
@ -120,6 +122,7 @@ SYM_FUNC_START(_save_ftop_context)
li.w a0, 0 # success
jr ra
SYM_FUNC_END(_save_ftop_context)
EXPORT_SYMBOL_GPL(_save_ftop_context)
/*
* a0: ftop
@ -150,6 +153,7 @@ SYM_FUNC_START(_restore_ftop_context)
li.w a0, 0 # success
jr ra
SYM_FUNC_END(_restore_ftop_context)
EXPORT_SYMBOL_GPL(_restore_ftop_context)
.L_lbt_fault:
li.w a0, -EFAULT # failure

View File

@ -51,27 +51,6 @@
#define lock_lbt_owner() ({ preempt_disable(); pagefault_disable(); })
#define unlock_lbt_owner() ({ pagefault_enable(); preempt_enable(); })
/* Assembly functions to move context to/from the FPU */
extern asmlinkage int
_save_fp_context(void __user *fpregs, void __user *fcc, void __user *csr);
extern asmlinkage int
_restore_fp_context(void __user *fpregs, void __user *fcc, void __user *csr);
extern asmlinkage int
_save_lsx_context(void __user *fpregs, void __user *fcc, void __user *fcsr);
extern asmlinkage int
_restore_lsx_context(void __user *fpregs, void __user *fcc, void __user *fcsr);
extern asmlinkage int
_save_lasx_context(void __user *fpregs, void __user *fcc, void __user *fcsr);
extern asmlinkage int
_restore_lasx_context(void __user *fpregs, void __user *fcc, void __user *fcsr);
#ifdef CONFIG_CPU_HAS_LBT
extern asmlinkage int _save_lbt_context(void __user *regs, void __user *eflags);
extern asmlinkage int _restore_lbt_context(void __user *regs, void __user *eflags);
extern asmlinkage int _save_ftop_context(void __user *ftop);
extern asmlinkage int _restore_ftop_context(void __user *ftop);
#endif
struct rt_sigframe {
struct siginfo rs_info;
struct ucontext rs_uctx;