Contributors: 14
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Suresh B. Siddha |
264 |
51.46% |
2 |
8.70% |
| Linus Torvalds |
90 |
17.54% |
1 |
4.35% |
| H. Peter Anvin |
37 |
7.21% |
2 |
8.70% |
| Thomas Gleixner |
37 |
7.21% |
6 |
26.09% |
| Sebastian Andrzej Siewior |
27 |
5.26% |
1 |
4.35% |
| Petteri Aimonen |
13 |
2.53% |
1 |
4.35% |
| Ingo Molnar |
13 |
2.53% |
3 |
13.04% |
| Roland McGrath |
12 |
2.34% |
1 |
4.35% |
| Jiri Slaby |
6 |
1.17% |
1 |
4.35% |
| Masahiro Yamada |
5 |
0.97% |
1 |
4.35% |
| Eric Biggers |
4 |
0.78% |
1 |
4.35% |
| Borislav Petkov |
3 |
0.58% |
1 |
4.35% |
| Greg Kroah-Hartman |
1 |
0.19% |
1 |
4.35% |
| Peter Zijlstra |
1 |
0.19% |
1 |
4.35% |
| Total |
513 |
|
23 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __X86_KERNEL_FPU_LEGACY_H
#define __X86_KERNEL_FPU_LEGACY_H
#include <asm/fpu/types.h>
extern unsigned int mxcsr_feature_mask;
static inline void ldmxcsr(u32 mxcsr)
{
asm volatile("ldmxcsr %0" :: "m" (mxcsr));
}
/*
* Returns 0 on success or the trap number when the operation raises an
* exception.
*/
#define user_insn(insn, output, input...) \
({ \
int err; \
\
might_fault(); \
\
asm volatile(ASM_STAC "\n" \
"1: " #insn "\n" \
"2: " ASM_CLAC "\n" \
_ASM_EXTABLE_TYPE(1b, 2b, EX_TYPE_FAULT_MCE_SAFE) \
: [err] "=a" (err), output \
: "0"(0), input); \
err; \
})
#define kernel_insn_err(insn, output, input...) \
({ \
int err; \
asm volatile("1:" #insn "\n\t" \
"2:\n" \
_ASM_EXTABLE_TYPE_REG(1b, 2b, EX_TYPE_EFAULT_REG, %[err]) \
: [err] "=r" (err), output \
: "0"(0), input); \
err; \
})
#define kernel_insn(insn, output, input...) \
asm volatile("1:" #insn "\n\t" \
"2:\n" \
_ASM_EXTABLE_TYPE(1b, 2b, EX_TYPE_FPU_RESTORE) \
: output : input)
static inline int fnsave_to_user_sigframe(struct fregs_state __user *fx)
{
return user_insn(fnsave %[fx]; fwait, [fx] "=m" (*fx), "m" (*fx));
}
static inline int fxsave_to_user_sigframe(struct fxregs_state __user *fx)
{
if (IS_ENABLED(CONFIG_X86_32))
return user_insn(fxsave %[fx], [fx] "=m" (*fx), "m" (*fx));
else
return user_insn(fxsaveq %[fx], [fx] "=m" (*fx), "m" (*fx));
}
static inline void fxrstor(struct fxregs_state *fx)
{
if (IS_ENABLED(CONFIG_X86_32))
kernel_insn(fxrstor %[fx], "=m" (*fx), [fx] "m" (*fx));
else
kernel_insn(fxrstorq %[fx], "=m" (*fx), [fx] "m" (*fx));
}
static inline int fxrstor_safe(struct fxregs_state *fx)
{
if (IS_ENABLED(CONFIG_X86_32))
return kernel_insn_err(fxrstor %[fx], "=m" (*fx), [fx] "m" (*fx));
else
return kernel_insn_err(fxrstorq %[fx], "=m" (*fx), [fx] "m" (*fx));
}
static inline int fxrstor_from_user_sigframe(struct fxregs_state __user *fx)
{
if (IS_ENABLED(CONFIG_X86_32))
return user_insn(fxrstor %[fx], "=m" (*fx), [fx] "m" (*fx));
else
return user_insn(fxrstorq %[fx], "=m" (*fx), [fx] "m" (*fx));
}
static inline void frstor(struct fregs_state *fx)
{
kernel_insn(frstor %[fx], "=m" (*fx), [fx] "m" (*fx));
}
static inline int frstor_safe(struct fregs_state *fx)
{
return kernel_insn_err(frstor %[fx], "=m" (*fx), [fx] "m" (*fx));
}
static inline int frstor_from_user_sigframe(struct fregs_state __user *fx)
{
return user_insn(frstor %[fx], "=m" (*fx), [fx] "m" (*fx));
}
static inline void fxsave(struct fxregs_state *fx)
{
if (IS_ENABLED(CONFIG_X86_32))
asm volatile( "fxsave %[fx]" : [fx] "=m" (*fx));
else
asm volatile("fxsaveq %[fx]" : [fx] "=m" (*fx));
}
#endif