arch/arm64/include/asm/kfence.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * arm64 KFENCE support.
   4  *
   5  * Copyright (C) 2020, Google LLC.
   6  */
   7
   8 #ifndef __ASM_KFENCE_H
   9 #define __ASM_KFENCE_H
  10
  11 #include <asm/set_memory.h>
  12
  13 static inline bool arch_kfence_init_pool(void) { return true; }
  14
  15 static inline bool kfence_protect_page(unsigned long addr, bool protect)
  16 {
  17         set_memory_valid(addr, 1, !protect);
  18
  19         return true;
  20 }
  21
  22 #ifdef CONFIG_KFENCE
  23 extern bool kfence_early_init;
  24 static inline bool arm64_kfence_can_set_direct_map(void)
  25 {
  26         return !kfence_early_init;
  27 }
  28 #else /* CONFIG_KFENCE */
  29 static inline bool arm64_kfence_can_set_direct_map(void) { return false; }
  30 #endif /* CONFIG_KFENCE */
  31
  32 #endif /* __ASM_KFENCE_H */