1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright 2017, Michael Ellerman, IBM Corporation. 4 */ 5#ifndef _LINUX_SET_MEMORY_H_ 6#define _LINUX_SET_MEMORY_H_ 7 8#ifdef CONFIG_ARCH_HAS_SET_MEMORY 9#include <asm/set_memory.h> 10#else 11static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; } 12static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; } 13static inline int set_memory_x(unsigned long addr, int numpages) { return 0; } 14static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; } 15#endif 16 17#ifndef set_memory_rox 18static inline int set_memory_rox(unsigned long addr, int numpages) 19{ 20 int ret = set_memory_ro(addr, numpages); 21 if (ret) 22 return ret; 23 return set_memory_x(addr, numpages); 24} 25#endif 26 27#ifndef CONFIG_ARCH_HAS_SET_DIRECT_MAP 28static inline int set_direct_map_invalid_noflush(struct page *page) 29{ 30 return 0; 31} 32static inline int set_direct_map_default_noflush(struct page *page) 33{ 34 return 0; 35} 36 37static inline bool kernel_page_present(struct page *page) 38{ 39 return true; 40} 41#else /* CONFIG_ARCH_HAS_SET_DIRECT_MAP */ 42/* 43 * Some architectures, e.g. ARM64 can disable direct map modifications at 44 * boot time. Let them overrive this query. 45 */ 46#ifndef can_set_direct_map 47static inline bool can_set_direct_map(void) 48{ 49 return true; 50} 51#define can_set_direct_map can_set_direct_map 52#endif 53#endif /* CONFIG_ARCH_HAS_SET_DIRECT_MAP */ 54 55#ifdef CONFIG_X86_64 56int set_mce_nospec(unsigned long pfn); 57int clear_mce_nospec(unsigned long pfn); 58#else 59static inline int set_mce_nospec(unsigned long pfn) 60{ 61 return 0; 62} 63static inline int clear_mce_nospec(unsigned long pfn) 64{ 65 return 0; 66} 67#endif 68 69#ifndef CONFIG_ARCH_HAS_MEM_ENCRYPT 70static inline int set_memory_encrypted(unsigned long addr, int numpages) 71{ 72 return 0; 73} 74 75static inline int set_memory_decrypted(unsigned long addr, int numpages) 76{ 77 return 0; 78} 79#endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */ 80 81#endif /* _LINUX_SET_MEMORY_H_ */ 82