1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_ARM_JUMP_LABEL_H 3 #define _ASM_ARM_JUMP_LABEL_H 4 5 #ifndef __ASSEMBLY__ 6 7 #include <linux/types.h> 8 #include <asm/unified.h> 9 10 #define JUMP_LABEL_NOP_SIZE 4 11 12 static __always_inline bool arch_static_branch(struct static_key *key, bool branch) 13 { 14 asm goto("1:\n\t" 15 WASM(nop) "\n\t" 16 ".pushsection __jump_table, \"aw\"\n\t" 17 ".word 1b, %l[l_yes], %c0\n\t" 18 ".popsection\n\t" 19 : : "i" (&((char *)key)[branch]) : : l_yes); 20 21 return false; 22 l_yes: 23 return true; 24 } 25 26 static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch) 27 { 28 asm goto("1:\n\t" 29 WASM(b) " %l[l_yes]\n\t" 30 ".pushsection __jump_table, \"aw\"\n\t" 31 ".word 1b, %l[l_yes], %c0\n\t" 32 ".popsection\n\t" 33 : : "i" (&((char *)key)[branch]) : : l_yes); 34 35 return false; 36 l_yes: 37 return true; 38 } 39 40 typedef u32 jump_label_t; 41 42 struct jump_entry { 43 jump_label_t code; 44 jump_label_t target; 45 jump_label_t key; 46 }; 47 48 #endif /* __ASSEMBLY__ */ 49 #endif 50