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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
09f05d85 RV |
2 | #ifndef _ASM_ARM_JUMP_LABEL_H |
3 | #define _ASM_ARM_JUMP_LABEL_H | |
4 | ||
55dd0df7 | 5 | #ifndef __ASSEMBLY__ |
09f05d85 RV |
6 | |
7 | #include <linux/types.h> | |
11276d53 | 8 | #include <asm/unified.h> |
09f05d85 RV |
9 | |
10 | #define JUMP_LABEL_NOP_SIZE 4 | |
11 | ||
11276d53 PZ |
12 | static __always_inline bool arch_static_branch(struct static_key *key, bool branch) |
13 | { | |
14 | asm_volatile_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 | } | |
09f05d85 | 25 | |
11276d53 | 26 | static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch) |
09f05d85 | 27 | { |
3f0116c3 | 28 | asm_volatile_goto("1:\n\t" |
11276d53 | 29 | WASM(b) " %l[l_yes]\n\t" |
09f05d85 RV |
30 | ".pushsection __jump_table, \"aw\"\n\t" |
31 | ".word 1b, %l[l_yes], %c0\n\t" | |
32 | ".popsection\n\t" | |
11276d53 | 33 | : : "i" (&((char *)key)[branch]) : : l_yes); |
09f05d85 RV |
34 | |
35 | return false; | |
36 | l_yes: | |
37 | return true; | |
38 | } | |
39 | ||
09f05d85 RV |
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 | ||
55dd0df7 | 48 | #endif /* __ASSEMBLY__ */ |
09f05d85 | 49 | #endif |