/* SPDX-License-Identifier: GPL-2.0-only */ /* * Interface for managing mitigations for Spectre vulnerabilities. * * Copyright (C) 2020 Google LLC * Author: Will Deacon <will@kernel.org> */ #ifndef __ASM_SPECTRE_H #define __ASM_SPECTRE_H #include <asm/cpufeature.h> /* Watch out, ordering is important here. */ enum mitigation_state { SPECTRE_UNAFFECTED, SPECTRE_MITIGATED, SPECTRE_VULNERABLE, }; struct task_struct; enum mitigation_state arm64_get_spectre_v2_state(void); bool has_spectre_v2(const struct arm64_cpu_capabilities *cap, int scope); void spectre_v2_enable_mitigation(const struct arm64_cpu_capabilities *__unused); enum mitigation_state arm64_get_spectre_v4_state(void); bool has_spectre_v4(const struct arm64_cpu_capabilities *cap, int scope); void spectre_v4_enable_mitigation(const struct arm64_cpu_capabilities *__unused); void spectre_v4_enable_task_mitigation(struct task_struct *tsk); #endif /* __ASM_SPECTRE_H */