[linux-2.6-block.git] / tools / arch / arm64 / include / asm / barrier.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _TOOLS_LINUX_ASM_AARCH64_BARRIER_H
#define _TOOLS_LINUX_ASM_AARCH64_BARRIER_H

/*
 * From tools/perf/perf-sys.h, last modified in:
 * f428ebd184c82a7914b2aa7e9f868918aaf7ea78 perf tools: Fix AAAAARGH64 memory barriers
 *
 * XXX: arch/arm64/include/asm/barrier.h in the kernel sources use dsb, is this
 * a case like for arm32 where we do things differently in userspace?
 */

#define mb()		asm volatile("dmb ish" ::: "memory")
#define wmb()		asm volatile("dmb ishst" ::: "memory")
#define rmb()		asm volatile("dmb ishld" ::: "memory")

#endif /* _TOOLS_LINUX_ASM_AARCH64_BARRIER_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
4f3db074 ACM	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 */