1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_S390_EXPOLINE_H
3 #define _ASM_S390_EXPOLINE_H
4
5 #ifndef __ASSEMBLY__
6
7 #include <linux/types.h>
8 #include <asm/facility.h>
9
10 extern int nospec_disable;
11 extern int nobp;
12
13 static inline bool nobp_enabled(void)
14 {
15 if (__is_defined(__DECOMPRESSOR))
16 return false;
17 return nobp && test_facility(82);
18 }
19
20 void nospec_init_branches(void);
21 void nospec_auto_detect(void);
22 void nospec_revert(s32 *start, s32 *end);
23
24 static inline bool nospec_uses_trampoline(void)
25 {
26 return __is_defined(CC_USING_EXPOLINE) && !nospec_disable;
27 }
28
29 #ifdef CONFIG_EXPOLINE_EXTERN
30
31 void __s390_indirect_jump_r1(void);
32 void __s390_indirect_jump_r2(void);
33 void __s390_indirect_jump_r3(void);
34 void __s390_indirect_jump_r4(void);
35 void __s390_indirect_jump_r5(void);
36 void __s390_indirect_jump_r6(void);
37 void __s390_indirect_jump_r7(void);
38 void __s390_indirect_jump_r8(void);
39 void __s390_indirect_jump_r9(void);
40 void __s390_indirect_jump_r10(void);
41 void __s390_indirect_jump_r11(void);
42 void __s390_indirect_jump_r12(void);
43 void __s390_indirect_jump_r13(void);
44 void __s390_indirect_jump_r14(void);
45 void __s390_indirect_jump_r15(void);
46
47 #endif
48
49 #endif /* __ASSEMBLY__ */
50
51 #endif /* _ASM_S390_EXPOLINE_H */
52
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