1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */
2dff9d3c2SDavid S. Miller #ifndef _ASM_SPARC_JUMP_LABEL_H
3dff9d3c2SDavid S. Miller #define _ASM_SPARC_JUMP_LABEL_H
4dff9d3c2SDavid S. Miller
555dd0df7SAnton Blanchard #ifndef __ASSEMBLY__
6dff9d3c2SDavid S. Miller
7dff9d3c2SDavid S. Miller #include <linux/types.h>
8dff9d3c2SDavid S. Miller
9dff9d3c2SDavid S. Miller #define JUMP_LABEL_NOP_SIZE 4
10dff9d3c2SDavid S. Miller
arch_static_branch(struct static_key * key,bool branch)1111276d53SPeter Zijlstra static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
12d430d3d7SJason Baron {
13*aaff74d8SLinus Torvalds asm goto("1:\n\t"
14d430d3d7SJason Baron "nop\n\t"
15d430d3d7SJason Baron "nop\n\t"
16d430d3d7SJason Baron ".pushsection __jump_table, \"aw\"\n\t"
17d430d3d7SJason Baron ".align 4\n\t"
18d430d3d7SJason Baron ".word 1b, %l[l_yes], %c0\n\t"
19d430d3d7SJason Baron ".popsection \n\t"
2011276d53SPeter Zijlstra : : "i" (&((char *)key)[branch]) : : l_yes);
2111276d53SPeter Zijlstra
2211276d53SPeter Zijlstra return false;
2311276d53SPeter Zijlstra l_yes:
2411276d53SPeter Zijlstra return true;
2511276d53SPeter Zijlstra }
2611276d53SPeter Zijlstra
arch_static_branch_jump(struct static_key * key,bool branch)2711276d53SPeter Zijlstra static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
2811276d53SPeter Zijlstra {
29*aaff74d8SLinus Torvalds asm goto("1:\n\t"
3011276d53SPeter Zijlstra "b %l[l_yes]\n\t"
3111276d53SPeter Zijlstra "nop\n\t"
3211276d53SPeter Zijlstra ".pushsection __jump_table, \"aw\"\n\t"
3311276d53SPeter Zijlstra ".align 4\n\t"
3411276d53SPeter Zijlstra ".word 1b, %l[l_yes], %c0\n\t"
3511276d53SPeter Zijlstra ".popsection \n\t"
3611276d53SPeter Zijlstra : : "i" (&((char *)key)[branch]) : : l_yes);
3711276d53SPeter Zijlstra
38d430d3d7SJason Baron return false;
39d430d3d7SJason Baron l_yes:
40d430d3d7SJason Baron return true;
41d430d3d7SJason Baron }
42dff9d3c2SDavid S. Miller
43dff9d3c2SDavid S. Miller typedef u32 jump_label_t;
44dff9d3c2SDavid S. Miller
45dff9d3c2SDavid S. Miller struct jump_entry {
46dff9d3c2SDavid S. Miller jump_label_t code;
47dff9d3c2SDavid S. Miller jump_label_t target;
48dff9d3c2SDavid S. Miller jump_label_t key;
49dff9d3c2SDavid S. Miller };
50dff9d3c2SDavid S. Miller
5155dd0df7SAnton Blanchard #endif /* __ASSEMBLY__ */
52dff9d3c2SDavid S. Miller #endif
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