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s390/zdtm: Also support z900 (debian)

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Debian is compiled for z900 - therefore we can't use the "laa"
instruction.

Fix this and replace "laa" by the older "cs" (compare and swap) loop.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
This commit is contained in:
Michael Holzheu 2017-07-14 15:41:13 +02:00 committed by Pavel Emelyanov
parent a04dc883cb
commit 9c94ed9669
1 changed files with 12 additions and 10 deletions
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22
test/zdtm/lib/arch/s390/include/asm/atomic.h
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@ -5,24 +5,26 @@
typedef uint32_t atomic_t;
#define __ATOMIC_OP(op_name, op_type, op_string, op_barrier) \
#define __ATOMIC_OP(op_name, op_type, op_string) \
static inline op_type op_name(op_type val, op_type *ptr) \
{ \
op_type old; \
op_type old, new; \
\
asm volatile( \
op_string " %[old],%[val],%[ptr]\n" \
op_barrier \
: [old] "=d" (old), [ptr] "+Q" (*ptr) \
: [val] "d" (val) : "cc", "memory"); \
"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_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_OP(op_name, op_type, op_string) \
__ATOMIC_OP(op_name##_barrier, op_type, op_string)
__ATOMIC_OPS(__atomic_add, uint32_t, "laa")
__ATOMIC_OPS(__atomic_add, uint32_t, "ar")
#undef __ATOMIC_OPS
#undef __ATOMIC_OP