1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __ASM_LSE_H 3#define __ASM_LSE_H 4 5#include <asm/atomic_ll_sc.h> 6 7#ifdef CONFIG_ARM64_LSE_ATOMICS 8 9#define __LSE_PREAMBLE ".arch_extension lse\n" 10 11#include <linux/compiler_types.h> 12#include <linux/export.h> 13#include <linux/stringify.h> 14#include <asm/alternative.h> 15#include <asm/alternative-macros.h> 16#include <asm/atomic_lse.h> 17#include <asm/cpucaps.h> 18 19#define __lse_ll_sc_body(op, ...) \ 20({ \ 21 alternative_has_cap_likely(ARM64_HAS_LSE_ATOMICS) ? \ 22 __lse_##op(__VA_ARGS__) : \ 23 __ll_sc_##op(__VA_ARGS__); \ 24}) 25 26/* In-line patching at runtime */ 27#define ARM64_LSE_ATOMIC_INSN(llsc, lse) \ 28 ALTERNATIVE(llsc, __LSE_PREAMBLE lse, ARM64_HAS_LSE_ATOMICS) 29 30#else /* CONFIG_ARM64_LSE_ATOMICS */ 31 32#define __lse_ll_sc_body(op, ...) __ll_sc_##op(__VA_ARGS__) 33 34#define ARM64_LSE_ATOMIC_INSN(llsc, lse) llsc 35 36#endif /* CONFIG_ARM64_LSE_ATOMICS */ 37#endif /* __ASM_LSE_H */ 38