162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * arm64 KFENCE support. 462306a36Sopenharmony_ci * 562306a36Sopenharmony_ci * Copyright (C) 2020, Google LLC. 662306a36Sopenharmony_ci */ 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#ifndef __ASM_KFENCE_H 962306a36Sopenharmony_ci#define __ASM_KFENCE_H 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ci#include <asm/set_memory.h> 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_cistatic inline bool arch_kfence_init_pool(void) { return true; } 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_cistatic inline bool kfence_protect_page(unsigned long addr, bool protect) 1662306a36Sopenharmony_ci{ 1762306a36Sopenharmony_ci set_memory_valid(addr, 1, !protect); 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci return true; 2062306a36Sopenharmony_ci} 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ci#ifdef CONFIG_KFENCE 2362306a36Sopenharmony_ciextern bool kfence_early_init; 2462306a36Sopenharmony_cistatic inline bool arm64_kfence_can_set_direct_map(void) 2562306a36Sopenharmony_ci{ 2662306a36Sopenharmony_ci return !kfence_early_init; 2762306a36Sopenharmony_ci} 2862306a36Sopenharmony_ci#else /* CONFIG_KFENCE */ 2962306a36Sopenharmony_cistatic inline bool arm64_kfence_can_set_direct_map(void) { return false; } 3062306a36Sopenharmony_ci#endif /* CONFIG_KFENCE */ 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ci#endif /* __ASM_KFENCE_H */ 33