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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/20241023162711.2579610-6-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Tested-by: kdevops <kdevops@lists.linux.dev> Cc: Andreas Larsson <andreas@gaisler.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: Brian Cain <bcain@quicinc.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Guo Ren <guoren@kernel.org> Cc: Helge Deller <deller@gmx.de> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Kent Overstreet <kent.overstreet@linux.dev> Cc: Liam R. Howlett <Liam.Howlett@Oracle.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Weinberger <richard@nod.at> Cc: Russell King <linux@armlinux.org.uk> Cc: Song Liu <song@kernel.org> Cc: Stafford Horne <shorne@gmail.com> Cc: Steven Rostedt (Google) <rostedt@goodmis.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Uladzislau Rezki (Sony) <urezki@gmail.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
63 lines
2 KiB
C
63 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2019 SiFive
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*/
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#ifndef _ASM_RISCV_SET_MEMORY_H
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#define _ASM_RISCV_SET_MEMORY_H
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#ifndef __ASSEMBLY__
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/*
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* Functions to change memory attributes.
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*/
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#ifdef CONFIG_MMU
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int set_memory_ro(unsigned long addr, int numpages);
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int set_memory_rw(unsigned long addr, int numpages);
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int set_memory_x(unsigned long addr, int numpages);
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int set_memory_nx(unsigned long addr, int numpages);
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int set_memory_rw_nx(unsigned long addr, int numpages);
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static __always_inline int set_kernel_memory(char *startp, char *endp,
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int (*set_memory)(unsigned long start,
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int num_pages))
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{
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unsigned long start = (unsigned long)startp;
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unsigned long end = (unsigned long)endp;
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int num_pages = PAGE_ALIGN(end - start) >> PAGE_SHIFT;
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return set_memory(start, num_pages);
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}
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#else
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static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; }
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static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; }
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static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
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static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; }
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static inline int set_memory_rw_nx(unsigned long addr, int numpages) { return 0; }
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static inline int set_kernel_memory(char *startp, char *endp,
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int (*set_memory)(unsigned long start,
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int num_pages))
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{
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return 0;
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}
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#endif
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int set_direct_map_invalid_noflush(struct page *page);
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int set_direct_map_default_noflush(struct page *page);
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int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid);
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bool kernel_page_present(struct page *page);
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#endif /* __ASSEMBLY__ */
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#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_XIP_KERNEL)
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#ifdef CONFIG_64BIT
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#define SECTION_ALIGN (1 << 21)
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#else
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#define SECTION_ALIGN (1 << 22)
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#endif
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#else /* !CONFIG_STRICT_KERNEL_RWX */
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#define SECTION_ALIGN L1_CACHE_BYTES
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#endif /* CONFIG_STRICT_KERNEL_RWX */
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#define PECOFF_SECTION_ALIGNMENT 0x1000
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#define PECOFF_FILE_ALIGNMENT 0x200
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#endif /* _ASM_RISCV_SET_MEMORY_H */
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