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| author | Zong Li <zong.li@sifive.com> | 2020-03-10 00:55:36 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-03-26 09:24:30 -0700 |
| commit | d3ab332a5021235a74fd832a49c6a99404920d88 (patch) | |
| tree | ba42ec3402a210cf0ba0989696b3069ede5943bf /arch/riscv/include/asm | |
| parent | 9f40b6e77d2f888a8c0608036eb124cedb6d2434 (diff) | |
| download | linux-next-d3ab332a5021235a74fd832a49c6a99404920d88.tar.gz | |
riscv: add ARCH_HAS_SET_MEMORY support
Add set_memory_ro/rw/x/nx architecture hooks to change the page
attribution.
Use own set_memory.h rather than generic set_memory.h
(i.e. include/asm-generic/set_memory.h), because we want to add other
function prototypes here.
Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/include/asm')
| -rw-r--r-- | arch/riscv/include/asm/set_memory.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/set_memory.h b/arch/riscv/include/asm/set_memory.h new file mode 100644 index 000000000000..79a810f0f38b --- /dev/null +++ b/arch/riscv/include/asm/set_memory.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2019 SiFive + */ + +#ifndef _ASM_RISCV_SET_MEMORY_H +#define _ASM_RISCV_SET_MEMORY_H + +/* + * Functions to change memory attributes. + */ +#ifdef CONFIG_MMU +int set_memory_ro(unsigned long addr, int numpages); +int set_memory_rw(unsigned long addr, int numpages); +int set_memory_x(unsigned long addr, int numpages); +int set_memory_nx(unsigned long addr, int numpages); +#else +static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; } +static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; } +static inline int set_memory_x(unsigned long addr, int numpages) { return 0; } +static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; } +#endif + +#endif /* _ASM_RISCV_SET_MEMORY_H */ |