mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-28 21:02:43 +01:00
Mike Rapoport (Microsoft)
0c6378a715
Add an API that will allow updates of the direct/linear map for a set of physically contiguous pages. It will be used in the following patches. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Mike Rapoport (Microsoft) <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]> Reviewed-by: Luis Chamberlain <[email protected]> Tested-by: kdevops <[email protected]> Cc: Andreas Larsson <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Ard Biesheuvel <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Borislav Petkov (AMD) <[email protected]> Cc: Brian Cain <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Christophe Leroy <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Dinh Nguyen <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Guo Ren <[email protected]> Cc: Helge Deller <[email protected]> Cc: Huacai Chen <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Johannes Berg <[email protected]> Cc: John Paul Adrian Glaubitz <[email protected]> Cc: Kent Overstreet <[email protected]> Cc: Liam R. Howlett <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Masami Hiramatsu (Google) <[email protected]> Cc: Matt Turner <[email protected]> Cc: Max Filippov <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Simek <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Russell King <[email protected]> Cc: Song Liu <[email protected]> Cc: Stafford Horne <[email protected]> Cc: Steven Rostedt (Google) <[email protected]> Cc: Suren Baghdasaryan <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Uladzislau Rezki (Sony) <[email protected]> Cc: Vineet Gupta <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
88 lines
2.1 KiB
C
88 lines
2.1 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 int set_direct_map_valid_noflush(struct page *page,
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unsigned nr, bool valid)
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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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