From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/arm64/include/asm/jump_label.h | 53 +++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 arch/arm64/include/asm/jump_label.h (limited to 'arch/arm64/include/asm/jump_label.h') diff --git a/arch/arm64/include/asm/jump_label.h b/arch/arm64/include/asm/jump_label.h new file mode 100644 index 0000000000..48ddc0f45d --- /dev/null +++ b/arch/arm64/include/asm/jump_label.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2013 Huawei Ltd. + * Author: Jiang Liu + * + * Based on arch/arm/include/asm/jump_label.h + */ +#ifndef __ASM_JUMP_LABEL_H +#define __ASM_JUMP_LABEL_H + +#ifndef __ASSEMBLY__ + +#include +#include + +#define JUMP_LABEL_NOP_SIZE AARCH64_INSN_SIZE + +static __always_inline bool arch_static_branch(struct static_key * const key, + const bool branch) +{ + asm_volatile_goto( + "1: nop \n\t" + " .pushsection __jump_table, \"aw\" \n\t" + " .align 3 \n\t" + " .long 1b - ., %l[l_yes] - . \n\t" + " .quad %c0 - . \n\t" + " .popsection \n\t" + : : "i"(&((char *)key)[branch]) : : l_yes); + + return false; +l_yes: + return true; +} + +static __always_inline bool arch_static_branch_jump(struct static_key * const key, + const bool branch) +{ + asm_volatile_goto( + "1: b %l[l_yes] \n\t" + " .pushsection __jump_table, \"aw\" \n\t" + " .align 3 \n\t" + " .long 1b - ., %l[l_yes] - . \n\t" + " .quad %c0 - . \n\t" + " .popsection \n\t" + : : "i"(&((char *)key)[branch]) : : l_yes); + + return false; +l_yes: + return true; +} + +#endif /* __ASSEMBLY__ */ +#endif /* __ASM_JUMP_LABEL_H */ -- cgit v1.2.3