arch/s390/include/asm/kasan.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_KASAN_H
   3 #define __ASM_KASAN_H
   4
   5 #include <asm/pgtable.h>
   6
   7 #ifdef CONFIG_KASAN
   8
   9 #define KASAN_SHADOW_SCALE_SHIFT 3
  10 #ifdef CONFIG_KASAN_S390_4_LEVEL_PAGING
  11 #define KASAN_SHADOW_SIZE                                                      \
  12         (_AC(1, UL) << (_REGION1_SHIFT - KASAN_SHADOW_SCALE_SHIFT))
  13 #else
  14 #define KASAN_SHADOW_SIZE                                                      \
  15         (_AC(1, UL) << (_REGION2_SHIFT - KASAN_SHADOW_SCALE_SHIFT))
  16 #endif
  17 #define KASAN_SHADOW_OFFSET     _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
  18 #define KASAN_SHADOW_START      KASAN_SHADOW_OFFSET
  19 #define KASAN_SHADOW_END        (KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
  20
  21 extern void kasan_early_init(void);
  22 extern void kasan_copy_shadow(pgd_t *dst);
  23 extern void kasan_free_early_identity(void);
  24 #else
  25 static inline void kasan_early_init(void) { }
  26 static inline void kasan_copy_shadow(pgd_t *dst) { }
  27 static inline void kasan_free_early_identity(void) { }
  28 #endif
  29
  30 #endif