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53 lines
1.2 KiB
53 lines
1.2 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2013 Huawei Ltd. |
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* Author: Jiang Liu <[email protected]> |
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* |
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* Based on arch/arm/include/asm/jump_label.h |
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*/ |
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#ifndef __ASM_JUMP_LABEL_H |
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#define __ASM_JUMP_LABEL_H |
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#ifndef __ASSEMBLY__ |
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#include <linux/types.h> |
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#include <asm/insn.h> |
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#define JUMP_LABEL_NOP_SIZE AARCH64_INSN_SIZE |
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static __always_inline bool arch_static_branch(struct static_key *key, |
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bool branch) |
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{ |
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asm_volatile_goto( |
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"1: nop \n\t" |
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" .pushsection __jump_table, \"aw\" \n\t" |
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" .align 3 \n\t" |
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" .long 1b - ., %l[l_yes] - . \n\t" |
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" .quad %c0 - . \n\t" |
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" .popsection \n\t" |
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: : "i"(&((char *)key)[branch]) : : l_yes); |
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return false; |
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l_yes: |
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return true; |
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} |
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static __always_inline bool arch_static_branch_jump(struct static_key *key, |
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bool branch) |
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{ |
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asm_volatile_goto( |
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"1: b %l[l_yes] \n\t" |
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" .pushsection __jump_table, \"aw\" \n\t" |
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" .align 3 \n\t" |
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" .long 1b - ., %l[l_yes] - . \n\t" |
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" .quad %c0 - . \n\t" |
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" .popsection \n\t" |
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: : "i"(&((char *)key)[branch]) : : l_yes); |
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return false; |
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l_yes: |
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return true; |
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} |
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#endif /* __ASSEMBLY__ */ |
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#endif /* __ASM_JUMP_LABEL_H */
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