Contributors: 12
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Peter Zijlstra |
166 |
72.17% |
1 |
7.69% |
| Mark Rutland |
18 |
7.83% |
2 |
15.38% |
| Andi Kleen |
16 |
6.96% |
1 |
7.69% |
| Uros Bizjak |
12 |
5.22% |
1 |
7.69% |
| Jeff Dike |
6 |
2.61% |
1 |
7.69% |
| H. Peter Anvin |
3 |
1.30% |
1 |
7.69% |
| Jeremy Fitzhardinge |
2 |
0.87% |
1 |
7.69% |
| Mathieu Desnoyers |
2 |
0.87% |
1 |
7.69% |
| Dmitriy Vyukov |
2 |
0.87% |
1 |
7.69% |
| Greg Kroah-Hartman |
1 |
0.43% |
1 |
7.69% |
| Christoph Lameter |
1 |
0.43% |
1 |
7.69% |
| Borislav Petkov |
1 |
0.43% |
1 |
7.69% |
| Total |
230 |
|
13 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_CMPXCHG_64_H
#define _ASM_X86_CMPXCHG_64_H
#define arch_cmpxchg64(ptr, o, n) \
({ \
BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
arch_cmpxchg((ptr), (o), (n)); \
})
#define arch_cmpxchg64_local(ptr, o, n) \
({ \
BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
arch_cmpxchg_local((ptr), (o), (n)); \
})
#define arch_try_cmpxchg64(ptr, po, n) \
({ \
BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
arch_try_cmpxchg((ptr), (po), (n)); \
})
union __u128_halves {
u128 full;
struct {
u64 low, high;
};
};
#define __arch_cmpxchg128(_ptr, _old, _new, _lock) \
({ \
union __u128_halves o = { .full = (_old), }, \
n = { .full = (_new), }; \
\
asm volatile(_lock "cmpxchg16b %[ptr]" \
: [ptr] "+m" (*(_ptr)), \
"+a" (o.low), "+d" (o.high) \
: "b" (n.low), "c" (n.high) \
: "memory"); \
\
o.full; \
})
static __always_inline u128 arch_cmpxchg128(volatile u128 *ptr, u128 old, u128 new)
{
return __arch_cmpxchg128(ptr, old, new, LOCK_PREFIX);
}
#define arch_cmpxchg128 arch_cmpxchg128
static __always_inline u128 arch_cmpxchg128_local(volatile u128 *ptr, u128 old, u128 new)
{
return __arch_cmpxchg128(ptr, old, new,);
}
#define arch_cmpxchg128_local arch_cmpxchg128_local
#define __arch_try_cmpxchg128(_ptr, _oldp, _new, _lock) \
({ \
union __u128_halves o = { .full = *(_oldp), }, \
n = { .full = (_new), }; \
bool ret; \
\
asm volatile(_lock "cmpxchg16b %[ptr]" \
CC_SET(e) \
: CC_OUT(e) (ret), \
[ptr] "+m" (*ptr), \
"+a" (o.low), "+d" (o.high) \
: "b" (n.low), "c" (n.high) \
: "memory"); \
\
if (unlikely(!ret)) \
*(_oldp) = o.full; \
\
likely(ret); \
})
static __always_inline bool arch_try_cmpxchg128(volatile u128 *ptr, u128 *oldp, u128 new)
{
return __arch_try_cmpxchg128(ptr, oldp, new, LOCK_PREFIX);
}
#define arch_try_cmpxchg128 arch_try_cmpxchg128
static __always_inline bool arch_try_cmpxchg128_local(volatile u128 *ptr, u128 *oldp, u128 new)
{
return __arch_try_cmpxchg128(ptr, oldp, new,);
}
#define arch_try_cmpxchg128_local arch_try_cmpxchg128_local
#define system_has_cmpxchg128() boot_cpu_has(X86_FEATURE_CX16)
#endif /* _ASM_X86_CMPXCHG_64_H */