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9b3a2be848
XIP has a history of being broken for long periods of time. In 2023, it was
broken for 18 months before getting fixed [1]. In 2024 it was 4 months [2].
And now it is broken again since commit a44fb57221 ("riscv: Add runtime
constant support"), 10 months ago.
These are clear signs that XIP feature is not being used.
I occasionally looked after XIP, but mostly because I was bored and had
nothing better to do.
Remove XIP support. Revert is possible if someone shows up complaining.
Link: https://lore.kernel.org/linux-riscv/20231212-customary-hardcover-e19462bf8e75@wendy/ [1]
Link: https://lore.kernel.org/linux-riscv/20240526110104.470429-1-namcao@linutronix.de/ [2]
Signed-off-by: Nam Cao <namcao@linutronix.de>
Cc: Frederik Haxel <haxel@fzi.de>
Cc: Vitaly Wool <vitaly.wool@konsulko.com>
Reviewed-by: Jisheng Zhang <jszhang@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20260202115403.2119218-1-namcao@linutronix.de
[pjw@kernel.org: updated to apply]
Signed-off-by: Paul Walmsley <pjw@kernel.org>
64 lines
2.0 KiB
C
64 lines
2.0 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 __ASSEMBLER__
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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 /* __ASSEMBLER__ */
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#if defined(CONFIG_STRICT_KERNEL_RWX)
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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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