mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 22:35:37 +07:00
b4fd5a0a92
Always inline asm inlines with variable operands for "i" constraints, since they won't compile if the compiler would decide to not inline them. Reported-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
144 lines
4.0 KiB
C
144 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Low level function for atomic operations
|
|
*
|
|
* Copyright IBM Corp. 1999, 2016
|
|
*/
|
|
|
|
#ifndef __ARCH_S390_ATOMIC_OPS__
|
|
#define __ARCH_S390_ATOMIC_OPS__
|
|
|
|
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
|
|
|
|
#define __ATOMIC_OP(op_name, op_type, op_string, op_barrier) \
|
|
static inline op_type op_name(op_type val, op_type *ptr) \
|
|
{ \
|
|
op_type old; \
|
|
\
|
|
asm volatile( \
|
|
op_string " %[old],%[val],%[ptr]\n" \
|
|
op_barrier \
|
|
: [old] "=d" (old), [ptr] "+Q" (*ptr) \
|
|
: [val] "d" (val) : "cc", "memory"); \
|
|
return old; \
|
|
} \
|
|
|
|
#define __ATOMIC_OPS(op_name, op_type, op_string) \
|
|
__ATOMIC_OP(op_name, op_type, op_string, "\n") \
|
|
__ATOMIC_OP(op_name##_barrier, op_type, op_string, "bcr 14,0\n")
|
|
|
|
__ATOMIC_OPS(__atomic_add, int, "laa")
|
|
__ATOMIC_OPS(__atomic_and, int, "lan")
|
|
__ATOMIC_OPS(__atomic_or, int, "lao")
|
|
__ATOMIC_OPS(__atomic_xor, int, "lax")
|
|
|
|
__ATOMIC_OPS(__atomic64_add, long, "laag")
|
|
__ATOMIC_OPS(__atomic64_and, long, "lang")
|
|
__ATOMIC_OPS(__atomic64_or, long, "laog")
|
|
__ATOMIC_OPS(__atomic64_xor, long, "laxg")
|
|
|
|
#undef __ATOMIC_OPS
|
|
#undef __ATOMIC_OP
|
|
|
|
#define __ATOMIC_CONST_OP(op_name, op_type, op_string, op_barrier) \
|
|
static __always_inline void op_name(op_type val, op_type *ptr) \
|
|
{ \
|
|
asm volatile( \
|
|
op_string " %[ptr],%[val]\n" \
|
|
op_barrier \
|
|
: [ptr] "+Q" (*ptr) : [val] "i" (val) : "cc", "memory");\
|
|
}
|
|
|
|
#define __ATOMIC_CONST_OPS(op_name, op_type, op_string) \
|
|
__ATOMIC_CONST_OP(op_name, op_type, op_string, "\n") \
|
|
__ATOMIC_CONST_OP(op_name##_barrier, op_type, op_string, "bcr 14,0\n")
|
|
|
|
__ATOMIC_CONST_OPS(__atomic_add_const, int, "asi")
|
|
__ATOMIC_CONST_OPS(__atomic64_add_const, long, "agsi")
|
|
|
|
#undef __ATOMIC_CONST_OPS
|
|
#undef __ATOMIC_CONST_OP
|
|
|
|
#else /* CONFIG_HAVE_MARCH_Z196_FEATURES */
|
|
|
|
#define __ATOMIC_OP(op_name, op_string) \
|
|
static inline int op_name(int val, int *ptr) \
|
|
{ \
|
|
int old, new; \
|
|
\
|
|
asm volatile( \
|
|
"0: lr %[new],%[old]\n" \
|
|
op_string " %[new],%[val]\n" \
|
|
" cs %[old],%[new],%[ptr]\n" \
|
|
" jl 0b" \
|
|
: [old] "=d" (old), [new] "=&d" (new), [ptr] "+Q" (*ptr)\
|
|
: [val] "d" (val), "0" (*ptr) : "cc", "memory"); \
|
|
return old; \
|
|
}
|
|
|
|
#define __ATOMIC_OPS(op_name, op_string) \
|
|
__ATOMIC_OP(op_name, op_string) \
|
|
__ATOMIC_OP(op_name##_barrier, op_string)
|
|
|
|
__ATOMIC_OPS(__atomic_add, "ar")
|
|
__ATOMIC_OPS(__atomic_and, "nr")
|
|
__ATOMIC_OPS(__atomic_or, "or")
|
|
__ATOMIC_OPS(__atomic_xor, "xr")
|
|
|
|
#undef __ATOMIC_OPS
|
|
|
|
#define __ATOMIC64_OP(op_name, op_string) \
|
|
static inline long op_name(long val, long *ptr) \
|
|
{ \
|
|
long old, new; \
|
|
\
|
|
asm volatile( \
|
|
"0: lgr %[new],%[old]\n" \
|
|
op_string " %[new],%[val]\n" \
|
|
" csg %[old],%[new],%[ptr]\n" \
|
|
" jl 0b" \
|
|
: [old] "=d" (old), [new] "=&d" (new), [ptr] "+Q" (*ptr)\
|
|
: [val] "d" (val), "0" (*ptr) : "cc", "memory"); \
|
|
return old; \
|
|
}
|
|
|
|
#define __ATOMIC64_OPS(op_name, op_string) \
|
|
__ATOMIC64_OP(op_name, op_string) \
|
|
__ATOMIC64_OP(op_name##_barrier, op_string)
|
|
|
|
__ATOMIC64_OPS(__atomic64_add, "agr")
|
|
__ATOMIC64_OPS(__atomic64_and, "ngr")
|
|
__ATOMIC64_OPS(__atomic64_or, "ogr")
|
|
__ATOMIC64_OPS(__atomic64_xor, "xgr")
|
|
|
|
#undef __ATOMIC64_OPS
|
|
|
|
#define __atomic_add_const(val, ptr) __atomic_add(val, ptr)
|
|
#define __atomic_add_const_barrier(val, ptr) __atomic_add(val, ptr)
|
|
#define __atomic64_add_const(val, ptr) __atomic64_add(val, ptr)
|
|
#define __atomic64_add_const_barrier(val, ptr) __atomic64_add(val, ptr)
|
|
|
|
#endif /* CONFIG_HAVE_MARCH_Z196_FEATURES */
|
|
|
|
static inline int __atomic_cmpxchg(int *ptr, int old, int new)
|
|
{
|
|
return __sync_val_compare_and_swap(ptr, old, new);
|
|
}
|
|
|
|
static inline int __atomic_cmpxchg_bool(int *ptr, int old, int new)
|
|
{
|
|
return __sync_bool_compare_and_swap(ptr, old, new);
|
|
}
|
|
|
|
static inline long __atomic64_cmpxchg(long *ptr, long old, long new)
|
|
{
|
|
return __sync_val_compare_and_swap(ptr, old, new);
|
|
}
|
|
|
|
static inline long __atomic64_cmpxchg_bool(long *ptr, long old, long new)
|
|
{
|
|
return __sync_bool_compare_and_swap(ptr, old, new);
|
|
}
|
|
|
|
#endif /* __ARCH_S390_ATOMIC_OPS__ */
|