arch/arm64/include/asm/spectre.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Interface for managing mitigations for Spectre vulnerabilities.
   4  *
   5  * Copyright (C) 2020 Google LLC
   6  * Author: Will Deacon <will@kernel.org>
   7  */
   8
   9 #ifndef __ASM_SPECTRE_H
  10 #define __ASM_SPECTRE_H
  11
  12 #include <asm/cpufeature.h>
  13
  14 /* Watch out, ordering is important here. */
  15 enum mitigation_state {
  16         SPECTRE_UNAFFECTED,
  17         SPECTRE_MITIGATED,
  18         SPECTRE_VULNERABLE,
  19 };
  20
  21 struct task_struct;
  22
  23 enum mitigation_state arm64_get_spectre_v2_state(void);
  24 bool has_spectre_v2(const struct arm64_cpu_capabilities *cap, int scope);
  25 void spectre_v2_enable_mitigation(const struct arm64_cpu_capabilities *__unused);
  26
  27 enum mitigation_state arm64_get_spectre_v4_state(void);
  28 bool has_spectre_v4(const struct arm64_cpu_capabilities *cap, int scope);
  29 void spectre_v4_enable_mitigation(const struct arm64_cpu_capabilities *__unused);
  30 void spectre_v4_enable_task_mitigation(struct task_struct *tsk);
  31
  32 #endif  /* __ASM_SPECTRE_H */