82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright 2017, Michael Ellerman, IBM Corporation.
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*/
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#ifndef _LINUX_SET_MEMORY_H_
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#define _LINUX_SET_MEMORY_H_
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#ifdef CONFIG_ARCH_HAS_SET_MEMORY
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#include <asm/set_memory.h>
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#else
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static inline int __must_check set_memory_ro(unsigned long addr, int numpages) { return 0; }
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static inline int __must_check set_memory_rw(unsigned long addr, int numpages) { return 0; }
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static inline int __must_check set_memory_x(unsigned long addr, int numpages) { return 0; }
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static inline int __must_check set_memory_nx(unsigned long addr, int numpages) { return 0; }
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#endif
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#ifndef set_memory_rox
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static inline int set_memory_rox(unsigned long addr, int numpages)
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{
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int ret = set_memory_ro(addr, numpages);
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if (ret)
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return ret;
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return set_memory_x(addr, numpages);
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}
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#endif
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#ifndef CONFIG_ARCH_HAS_SET_DIRECT_MAP
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static inline int set_direct_map_invalid_noflush(struct page *page)
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{
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return 0;
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}
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static inline int set_direct_map_default_noflush(struct page *page)
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{
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return 0;
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}
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static inline bool kernel_page_present(struct page *page)
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{
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return true;
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}
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#else /* CONFIG_ARCH_HAS_SET_DIRECT_MAP */
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/*
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* Some architectures, e.g. ARM64 can disable direct map modifications at
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* boot time. Let them overrive this query.
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*/
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#ifndef can_set_direct_map
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static inline bool can_set_direct_map(void)
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{
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return true;
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}
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#define can_set_direct_map can_set_direct_map
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#endif
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#endif /* CONFIG_ARCH_HAS_SET_DIRECT_MAP */
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#ifdef CONFIG_X86_64
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int set_mce_nospec(unsigned long pfn);
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int clear_mce_nospec(unsigned long pfn);
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#else
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static inline int set_mce_nospec(unsigned long pfn)
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{
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return 0;
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}
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static inline int clear_mce_nospec(unsigned long pfn)
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{
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return 0;
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}
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#endif
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#ifndef CONFIG_ARCH_HAS_MEM_ENCRYPT
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static inline int set_memory_encrypted(unsigned long addr, int numpages)
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{
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return 0;
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}
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static inline int set_memory_decrypted(unsigned long addr, int numpages)
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{
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return 0;
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}
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#endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */
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#endif /* _LINUX_SET_MEMORY_H_ */
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