arch/s390/include/asm/nospec-branch.h

   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 */