1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _TOOLS_LINUX_ASM_AARCH64_BARRIER_H
3 #define _TOOLS_LINUX_ASM_AARCH64_BARRIER_H
4 
5 /*
6  * From tools/perf/perf-sys.h, last modified in:
7  * f428ebd184c82a7914b2aa7e9f868918aaf7ea78 perf tools: Fix AAAAARGH64 memory barriers
8  *
9  * XXX: arch/arm64/include/asm/barrier.h in the kernel sources use dsb, is this
10  * a case like for arm32 where we do things differently in userspace?
11  */
12 
13 #define mb()		asm volatile("dmb ish" ::: "memory")
14 #define wmb()		asm volatile("dmb ishst" ::: "memory")
15 #define rmb()		asm volatile("dmb ishld" ::: "memory")
16 
17 #endif /* _TOOLS_LINUX_ASM_AARCH64_BARRIER_H */
18