51 lines
1.0 KiB
C
51 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_SW64_JUMP_LABEL_H
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#define __ASM_SW64_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 SW64_INSN_SIZE
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static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
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{
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asm_volatile_goto("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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".quad 1b, %l[l_yes], %0\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, bool branch)
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{
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asm_volatile_goto("1: br %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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".quad 1b, %l[l_yes], %0\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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typedef u64 jump_label_t;
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struct jump_entry {
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jump_label_t code;
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jump_label_t target;
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jump_label_t key;
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};
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_SW64_JUMP_LABEL_H */
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