1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_S390_FUTEX_H
3 #define _ASM_S390_FUTEX_H
5 #include <linux/uaccess.h>
6 #include <linux/futex.h>
7 #include <asm/mmu_context.h>
10 #define __futex_atomic_op(insn, ret, oldval, newval, uaddr, oparg) \
15 "2: cs %1,%2,0(%6)\n" \
19 EX_TABLE(0b,4b) EX_TABLE(2b,4b) EX_TABLE(3b,4b) \
20 : "=d" (ret), "=&d" (oldval), "=&d" (newval), \
22 : "0" (-EFAULT), "d" (oparg), "a" (uaddr), \
25 static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
28 int oldval = 0, newval, ret;
31 old_fs = enable_sacf_uaccess();
34 __futex_atomic_op("lr %2,%5\n",
35 ret, oldval, newval, uaddr, oparg);
38 __futex_atomic_op("lr %2,%1\nar %2,%5\n",
39 ret, oldval, newval, uaddr, oparg);
42 __futex_atomic_op("lr %2,%1\nor %2,%5\n",
43 ret, oldval, newval, uaddr, oparg);
46 __futex_atomic_op("lr %2,%1\nnr %2,%5\n",
47 ret, oldval, newval, uaddr, oparg);
50 __futex_atomic_op("lr %2,%1\nxr %2,%5\n",
51 ret, oldval, newval, uaddr, oparg);
56 disable_sacf_uaccess(old_fs);
64 static inline int futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
65 u32 oldval, u32 newval)
70 old_fs = enable_sacf_uaccess();
76 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
77 : "=d" (ret), "+d" (oldval), "=m" (*uaddr)
78 : "0" (-EFAULT), "d" (newval), "a" (uaddr), "m" (*uaddr)
80 disable_sacf_uaccess(old_fs);
85 #endif /* _ASM_S390_FUTEX_H */